From 561f7d17390d00444e6cd0b02b7516c91528082e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:53:59 +1100 Subject: [XFS] split up xfs_btree_init_cursor xfs_btree_init_cursor contains close to little shared code for the different btrees and will get even more non-common code in the future. Split it up into one routine per btree type. Because xfs_btree_dup_cursor needs to call the init routine for a generic btree cursor add a new btree operation vector that contains a dup_cursor method that initializes a new cursor based on an existing one. The btree operations vector is based on an idea and code from Dave Chinner and will grow more entries later during this series. SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32176a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_ialloc.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index aad8c5da38a..11bb169561c 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -335,8 +335,7 @@ xfs_ialloc_ag_alloc( /* * Insert records describing the new inode chunk into the btree. */ - cur = xfs_btree_init_cursor(args.mp, tp, agbp, agno, - XFS_BTNUM_INO, (xfs_inode_t *)0, 0); + cur = xfs_inobt_init_cursor(args.mp, tp, agbp, agno); for (thisino = newino; thisino < newino + newlen; thisino += XFS_INODES_PER_CHUNK) { @@ -676,8 +675,7 @@ nextag: */ agno = tagno; *IO_agbp = NULL; - cur = xfs_btree_init_cursor(mp, tp, agbp, be32_to_cpu(agi->agi_seqno), - XFS_BTNUM_INO, (xfs_inode_t *)0, 0); + cur = xfs_inobt_init_cursor(mp, tp, agbp, be32_to_cpu(agi->agi_seqno)); /* * If pagino is 0 (this is the root inode allocation) use newino. * This must work because we've just allocated some. @@ -1022,8 +1020,7 @@ xfs_difree( /* * Initialize the cursor. */ - cur = xfs_btree_init_cursor(mp, tp, agbp, agno, XFS_BTNUM_INO, - (xfs_inode_t *)0, 0); + cur = xfs_inobt_init_cursor(mp, tp, agbp, agno); #ifdef DEBUG if (cur->bc_nlevels == 1) { int freecount = 0; @@ -1259,8 +1256,7 @@ xfs_dilocate( #endif /* DEBUG */ return error; } - cur = xfs_btree_init_cursor(mp, tp, agbp, agno, XFS_BTNUM_INO, - (xfs_inode_t *)0, 0); + cur = xfs_inobt_init_cursor(mp, tp, agbp, agno); if ((error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i))) { #ifdef DEBUG xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: " -- cgit v1.2.3-70-g09d2 From 637aa50f461b8ea6b1e8bf9877b0d13d00085043 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:55:45 +1100 Subject: [XFS] implement generic xfs_btree_increment From: Dave Chinner Because this is the first major generic btree routine this patch includes some infrastrucure, first a few routines to deal with a btree block that can be either in short or long form, second xfs_btree_read_buf_block, which is the new central routine to read a btree block given a cursor, and third the new xfs_btree_ptr_addr routine to calculate the address for a given btree pointer record. [hch: split out from bigger patch and minor adaptions] SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32190a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 12 +-- fs/xfs/xfs_alloc_btree.c | 99 +-------------------- fs/xfs/xfs_alloc_btree.h | 6 -- fs/xfs/xfs_bmap.c | 4 +- fs/xfs/xfs_bmap_btree.c | 88 +----------------- fs/xfs/xfs_bmap_btree.h | 1 - fs/xfs/xfs_btree.c | 222 ++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 10 +++ fs/xfs/xfs_ialloc.c | 14 +-- fs/xfs/xfs_ialloc_btree.c | 99 +-------------------- fs/xfs/xfs_ialloc_btree.h | 6 -- fs/xfs/xfs_itable.c | 6 +- 12 files changed, 262 insertions(+), 305 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 69833eb1de4..b8bb694b7da 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -818,7 +818,7 @@ xfs_alloc_ag_vextent_near( XFS_WANT_CORRUPTED_GOTO(i == 1, error0); if (ltlen >= args->minlen) break; - if ((error = xfs_alloc_increment(cnt_cur, 0, &i))) + if ((error = xfs_btree_increment(cnt_cur, 0, &i))) goto error0; } while (i); ASSERT(ltlen >= args->minlen); @@ -828,7 +828,7 @@ xfs_alloc_ag_vextent_near( i = cnt_cur->bc_ptrs[0]; for (j = 1, blen = 0, bdiff = 0; !error && j && (blen < args->maxlen || bdiff > 0); - error = xfs_alloc_increment(cnt_cur, 0, &j)) { + error = xfs_btree_increment(cnt_cur, 0, &j)) { /* * For each entry, decide if it's better than * the previous best entry. @@ -938,7 +938,7 @@ xfs_alloc_ag_vextent_near( * Increment the cursor, so we will point at the entry just right * of the leftward entry if any, or to the leftmost entry. */ - if ((error = xfs_alloc_increment(bno_cur_gt, 0, &i))) + if ((error = xfs_btree_increment(bno_cur_gt, 0, &i))) goto error0; if (!i) { /* @@ -977,7 +977,7 @@ xfs_alloc_ag_vextent_near( args->minlen, >bnoa, >lena); if (gtlena >= args->minlen) break; - if ((error = xfs_alloc_increment(bno_cur_gt, 0, &i))) + if ((error = xfs_btree_increment(bno_cur_gt, 0, &i))) goto error0; if (!i) { xfs_btree_del_cursor(bno_cur_gt, @@ -1066,7 +1066,7 @@ xfs_alloc_ag_vextent_near( /* * Fell off the right end. */ - if ((error = xfs_alloc_increment( + if ((error = xfs_btree_increment( bno_cur_gt, 0, &i))) goto error0; if (!i) { @@ -1548,7 +1548,7 @@ xfs_free_ag_extent( * Look for a neighboring block on the right (higher block numbers) * that is contiguous with this space. */ - if ((error = xfs_alloc_increment(bno_cur, 0, &haveright))) + if ((error = xfs_btree_increment(bno_cur, 0, &haveright))) goto error0; if (haveright) { /* diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index 9e2421c31a3..febc2d5ea29 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -303,7 +303,7 @@ xfs_alloc_delrec( */ i = xfs_btree_lastrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_increment(tcur, level, &i))) + if ((error = xfs_btree_increment(tcur, level, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); i = xfs_btree_lastrec(tcur, level); @@ -517,7 +517,7 @@ xfs_alloc_delrec( * us, increment the cursor at that level. */ else if (level + 1 < cur->bc_nlevels && - (error = xfs_alloc_increment(cur, level + 1, &i))) + (error = xfs_btree_increment(cur, level + 1, &i))) return error; /* * Fix up the number of records in the surviving block. @@ -1134,7 +1134,7 @@ xfs_alloc_lookup( int i; cur->bc_ptrs[0] = keyno; - if ((error = xfs_alloc_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 1); *stat = 1; @@ -1570,7 +1570,7 @@ xfs_alloc_rshift( return error; i = xfs_btree_lastrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_increment(tcur, level, &i)) || + if ((error = xfs_btree_increment(tcur, level, &i)) || (error = xfs_alloc_updkey(tcur, rkp, level + 1))) goto error0; xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); @@ -1942,97 +1942,6 @@ xfs_alloc_get_rec( return 0; } -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_alloc_increment( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level in btree, 0 is leaf */ - int *stat) /* success/failure */ -{ - xfs_alloc_block_t *block; /* btree block */ - xfs_buf_t *bp; /* tree block buffer */ - int error; /* error return value */ - int lev; /* btree level */ - - ASSERT(level < cur->bc_nlevels); - /* - * Read-ahead to the right at this level. - */ - xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA); - /* - * Get a pointer to the btree block. - */ - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_ALLOC_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, bp))) - return error; -#endif - /* - * Increment the ptr at this level. If we're still in the block - * then we're done. - */ - if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) { - *stat = 1; - return 0; - } - /* - * If we just went off the right edge of the tree, return failure. - */ - if (be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK) { - *stat = 0; - return 0; - } - /* - * March up the tree incrementing pointers. - * Stop when we don't go off the right edge of a block. - */ - for (lev = level + 1; lev < cur->bc_nlevels; lev++) { - bp = cur->bc_bufs[lev]; - block = XFS_BUF_TO_ALLOC_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, lev, bp))) - return error; -#endif - if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs)) - break; - /* - * Read-ahead the right block, we're going to read it - * in the next loop. - */ - xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA); - } - /* - * If we went off the root then we are seriously confused. - */ - ASSERT(lev < cur->bc_nlevels); - /* - * Now walk back down the tree, fixing up the cursor's buffer - * pointers and key numbers. - */ - for (bp = cur->bc_bufs[lev], block = XFS_BUF_TO_ALLOC_BLOCK(bp); - lev > level; ) { - xfs_agblock_t agbno; /* block number of btree block */ - - agbno = be32_to_cpu(*XFS_ALLOC_PTR_ADDR(block, cur->bc_ptrs[lev], cur)); - if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp, - cur->bc_private.a.agno, agbno, 0, &bp, - XFS_ALLOC_BTREE_REF))) - return error; - lev--; - xfs_btree_setbuf(cur, lev, bp); - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - if ((error = xfs_btree_check_sblock(cur, block, lev, bp))) - return error; - cur->bc_ptrs[lev] = 1; - } - *stat = 1; - return 0; -} - /* * Insert the current record at the point referenced by cur. * The cursor may be inconsistent on return if splits have been done. diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 60735384a4c..643cfabbf67 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -113,12 +113,6 @@ extern int xfs_alloc_delete(struct xfs_btree_cur *cur, int *stat); extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno, xfs_extlen_t *len, int *stat); -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -extern int xfs_alloc_increment(struct xfs_btree_cur *cur, int level, int *stat); - /* * Insert the current record at the point referenced by cur. * The cursor may be inconsistent on return if splits have been done. diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index a84d0c30b48..4b1ec44c80a 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -1646,7 +1646,7 @@ xfs_bmap_add_extent_unwritten_real( PREV.br_blockcount - new->br_blockcount, oldext))) goto done; - if ((error = xfs_bmbt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto done; if ((error = xfs_bmbt_update(cur, new->br_startoff, new->br_startblock, @@ -3253,7 +3253,7 @@ xfs_bmap_del_extent( got.br_startblock, temp, got.br_state))) goto done; - if ((error = xfs_bmbt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto done; cur->bc_rec.b = new; error = xfs_bmbt_insert(cur, &i); diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index a71010abf6e..2d29a4980cf 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -254,7 +254,7 @@ xfs_bmbt_delrec( if (rbno != NULLFSBLOCK) { i = xfs_btree_lastrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_bmbt_increment(tcur, level, &i))) { + if ((error = xfs_btree_increment(tcur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -445,7 +445,7 @@ xfs_bmbt_delrec( cur->bc_bufs[level] = lbp; cur->bc_ptrs[level] += lrecs; cur->bc_ra[level] = 0; - } else if ((error = xfs_bmbt_increment(cur, level + 1, &i))) { + } else if ((error = xfs_btree_increment(cur, level + 1, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -929,7 +929,7 @@ xfs_bmbt_lookup( if (dir == XFS_LOOKUP_GE && keyno > be16_to_cpu(block->bb_numrecs) && be64_to_cpu(block->bb_rightsib) != NULLDFSBNO) { cur->bc_ptrs[0] = keyno; - if ((error = xfs_bmbt_increment(cur, 0, &i))) { + if ((error = xfs_btree_increment(cur, 0, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); return error; } @@ -1202,7 +1202,7 @@ xfs_bmbt_rshift( } i = xfs_btree_lastrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_bmbt_increment(tcur, level, &i))) { + if ((error = xfs_btree_increment(tcur, level, &i))) { XFS_BMBT_TRACE_CURSOR(tcur, ERROR); goto error1; } @@ -1760,86 +1760,6 @@ xfs_bmbt_disk_get_startoff( XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; } -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_bmbt_increment( - xfs_btree_cur_t *cur, - int level, - int *stat) /* success/failure */ -{ - xfs_bmbt_block_t *block; - xfs_buf_t *bp; - int error; /* error return value */ - xfs_fsblock_t fsbno; - int lev; - xfs_mount_t *mp; - xfs_trans_t *tp; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGI(cur, level); - ASSERT(level < cur->bc_nlevels); - - xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA); - block = xfs_bmbt_get_block(cur, level, &bp); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, block, level, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } -#endif - if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - if (be64_to_cpu(block->bb_rightsib) == NULLDFSBNO) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - for (lev = level + 1; lev < cur->bc_nlevels; lev++) { - block = xfs_bmbt_get_block(cur, lev, &bp); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } -#endif - if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs)) - break; - xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA); - } - if (lev == cur->bc_nlevels) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - tp = cur->bc_tp; - mp = cur->bc_mp; - for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) { - fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur)); - if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp, - XFS_BMAP_BTREE_REF))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - lev--; - xfs_btree_setbuf(cur, lev, bp); - block = XFS_BUF_TO_BMBT_BLOCK(bp); - if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - cur->bc_ptrs[lev] = 1; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; -} - /* * Insert the current record at the point referenced by cur. * diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index 5628d89cea4..a45be38d9a3 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -251,7 +251,6 @@ extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s); extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); -extern int xfs_bmbt_increment(struct xfs_btree_cur *, int, int *); extern int xfs_bmbt_insert(struct xfs_btree_cur *, int *); extern void xfs_bmbt_log_block(struct xfs_btree_cur *, struct xfs_buf *, int); extern void xfs_bmbt_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int, diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 4aec7c7d5ba..e9ab86b7990 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -35,6 +35,7 @@ #include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_btree.h" +#include "xfs_btree_trace.h" #include "xfs_ialloc.h" #include "xfs_error.h" @@ -949,3 +950,224 @@ xfs_btree_setbuf( cur->bc_ra[lev] |= XFS_BTCUR_RIGHTRA; } } + +STATIC int +xfs_btree_ptr_is_null( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr) +{ + if (cur->bc_flags & XFS_BTREE_LONG_PTRS) + return be64_to_cpu(ptr->l) == NULLFSBLOCK; + else + return be32_to_cpu(ptr->s) == NULLAGBLOCK; +} + +/* + * Get/set/init sibling pointers + */ +STATIC void +xfs_btree_get_sibling( + struct xfs_btree_cur *cur, + struct xfs_btree_block *block, + union xfs_btree_ptr *ptr, + int lr) +{ + ASSERT(lr == XFS_BB_LEFTSIB || lr == XFS_BB_RIGHTSIB); + + if (cur->bc_flags & XFS_BTREE_LONG_PTRS) { + if (lr == XFS_BB_RIGHTSIB) + ptr->l = block->bb_u.l.bb_rightsib; + else + ptr->l = block->bb_u.l.bb_leftsib; + } else { + if (lr == XFS_BB_RIGHTSIB) + ptr->s = block->bb_u.s.bb_rightsib; + else + ptr->s = block->bb_u.s.bb_leftsib; + } +} + +STATIC xfs_daddr_t +xfs_btree_ptr_to_daddr( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr) +{ + if (cur->bc_flags & XFS_BTREE_LONG_PTRS) { + ASSERT(be64_to_cpu(ptr->l) != NULLFSBLOCK); + + return XFS_FSB_TO_DADDR(cur->bc_mp, be64_to_cpu(ptr->l)); + } else { + ASSERT(cur->bc_private.a.agno != NULLAGNUMBER); + ASSERT(be32_to_cpu(ptr->s) != NULLAGBLOCK); + + return XFS_AGB_TO_DADDR(cur->bc_mp, cur->bc_private.a.agno, + be32_to_cpu(ptr->s)); + } +} + +STATIC void +xfs_btree_set_refs( + struct xfs_btree_cur *cur, + struct xfs_buf *bp) +{ + switch (cur->bc_btnum) { + case XFS_BTNUM_BNO: + case XFS_BTNUM_CNT: + XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_MAP, XFS_ALLOC_BTREE_REF); + break; + case XFS_BTNUM_INO: + XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_INOMAP, XFS_INO_BTREE_REF); + break; + case XFS_BTNUM_BMAP: + XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_MAP, XFS_BMAP_BTREE_REF); + break; + default: + ASSERT(0); + } +} + +/* + * Read in the buffer at the given ptr and return the buffer and + * the block pointer within the buffer. + */ +STATIC int +xfs_btree_read_buf_block( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr, + int level, + int flags, + struct xfs_btree_block **block, + struct xfs_buf **bpp) +{ + struct xfs_mount *mp = cur->bc_mp; + xfs_daddr_t d; + int error; + + /* need to sort out how callers deal with failures first */ + ASSERT(!(flags & XFS_BUF_TRYLOCK)); + + d = xfs_btree_ptr_to_daddr(cur, ptr); + error = xfs_trans_read_buf(mp, cur->bc_tp, mp->m_ddev_targp, d, + mp->m_bsize, flags, bpp); + if (error) + return error; + + ASSERT(*bpp != NULL); + ASSERT(!XFS_BUF_GETERROR(*bpp)); + + xfs_btree_set_refs(cur, *bpp); + *block = XFS_BUF_TO_BLOCK(*bpp); + + error = xfs_btree_check_block(cur, *block, level, *bpp); + if (error) + xfs_trans_brelse(cur->bc_tp, *bpp); + return error; +} + +/* + * Increment cursor by one record at the level. + * For nonzero levels the leaf-ward information is untouched. + */ +int /* error */ +xfs_btree_increment( + struct xfs_btree_cur *cur, + int level, + int *stat) /* success/failure */ +{ + struct xfs_btree_block *block; + union xfs_btree_ptr ptr; + struct xfs_buf *bp; + int error; /* error return value */ + int lev; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGI(cur, level); + + ASSERT(level < cur->bc_nlevels); + + /* Read-ahead to the right at this level. */ + xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA); + + /* Get a pointer to the btree block. */ + block = xfs_btree_get_block(cur, level, &bp); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, level, bp); + if (error) + goto error0; +#endif + + /* We're done if we remain in the block after the increment. */ + if (++cur->bc_ptrs[level] <= xfs_btree_get_numrecs(block)) + goto out1; + + /* Fail if we just went off the right edge of the tree. */ + xfs_btree_get_sibling(cur, block, &ptr, XFS_BB_RIGHTSIB); + if (xfs_btree_ptr_is_null(cur, &ptr)) + goto out0; + + XFS_BTREE_STATS_INC(cur, increment); + + /* + * March up the tree incrementing pointers. + * Stop when we don't go off the right edge of a block. + */ + for (lev = level + 1; lev < cur->bc_nlevels; lev++) { + block = xfs_btree_get_block(cur, lev, &bp); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, lev, bp); + if (error) + goto error0; +#endif + + if (++cur->bc_ptrs[lev] <= xfs_btree_get_numrecs(block)) + break; + + /* Read-ahead the right block for the next loop. */ + xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA); + } + + /* + * If we went off the root then we are either seriously + * confused or have the tree root in an inode. + */ + if (lev == cur->bc_nlevels) { + if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) + goto out0; + ASSERT(0); + error = EFSCORRUPTED; + goto error0; + } + ASSERT(lev < cur->bc_nlevels); + + /* + * Now walk back down the tree, fixing up the cursor's buffer + * pointers and key numbers. + */ + for (block = xfs_btree_get_block(cur, lev, &bp); lev > level; ) { + union xfs_btree_ptr *ptrp; + + ptrp = xfs_btree_ptr_addr(cur, cur->bc_ptrs[lev], block); + error = xfs_btree_read_buf_block(cur, ptrp, --lev, + 0, &block, &bp); + if (error) + goto error0; + + xfs_btree_setbuf(cur, lev, bp); + cur->bc_ptrs[lev] = 1; + } +out1: + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 1; + return 0; + +out0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 0; + return 0; + +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index 593f82b01b6..f5a4b8ec4cd 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -502,9 +502,19 @@ xfs_btree_setbuf( struct xfs_buf *bp); /* new buffer to set */ +/* + * Common btree core entry points. + */ +int xfs_btree_increment(struct xfs_btree_cur *, int, int *); + /* * Helpers. */ +static inline int xfs_btree_get_numrecs(struct xfs_btree_block *block) +{ + return be16_to_cpu(block->bb_numrecs); +} + static inline int xfs_btree_get_level(struct xfs_btree_block *block) { return be16_to_cpu(block->bb_level); diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 11bb169561c..3a8f0670e07 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -695,7 +695,7 @@ nextag: goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); freecount += rec.ir_freecount; - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto error0; } while (i == 1); @@ -753,7 +753,7 @@ nextag: /* * Search right with cur, go forward 1 record. */ - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto error1; doneright = !i; if (!doneright) { @@ -835,7 +835,7 @@ nextag: * further right. */ else { - if ((error = xfs_inobt_increment(cur, 0, + if ((error = xfs_btree_increment(cur, 0, &i))) goto error1; doneright = !i; @@ -890,7 +890,7 @@ nextag: XFS_WANT_CORRUPTED_GOTO(i == 1, error0); if (rec.ir_freecount > 0) break; - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); } @@ -924,7 +924,7 @@ nextag: goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); freecount += rec.ir_freecount; - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto error0; } while (i == 1); ASSERT(freecount == be32_to_cpu(agi->agi_freecount) || @@ -1033,7 +1033,7 @@ xfs_difree( goto error0; if (i) { freecount += rec.ir_freecount; - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto error0; } } while (i == 1); @@ -1138,7 +1138,7 @@ xfs_difree( goto error0; if (i) { freecount += rec.ir_freecount; - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) goto error0; } } while (i == 1); diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index fc6db94492d..41717da6369 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -253,7 +253,7 @@ xfs_inobt_delrec( */ i = xfs_btree_lastrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_inobt_increment(tcur, level, &i))) + if ((error = xfs_btree_increment(tcur, level, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); i = xfs_btree_lastrec(tcur, level); @@ -463,7 +463,7 @@ xfs_inobt_delrec( * us, increment the cursor at that level. */ else if (level + 1 < cur->bc_nlevels && - (error = xfs_alloc_increment(cur, level + 1, &i))) + (error = xfs_btree_increment(cur, level + 1, &i))) return error; /* * Fix up the number of records in the surviving block. @@ -1014,7 +1014,7 @@ xfs_inobt_lookup( int i; cur->bc_ptrs[0] = keyno; - if ((error = xfs_inobt_increment(cur, 0, &i))) + if ((error = xfs_btree_increment(cur, 0, &i))) return error; ASSERT(i == 1); *stat = 1; @@ -1443,7 +1443,7 @@ xfs_inobt_rshift( if ((error = xfs_btree_dup_cursor(cur, &tcur))) return error; xfs_btree_lastrec(tcur, level); - if ((error = xfs_inobt_increment(tcur, level, &i)) || + if ((error = xfs_btree_increment(tcur, level, &i)) || (error = xfs_inobt_updkey(tcur, rkp, level + 1))) { xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); return error; @@ -1820,97 +1820,6 @@ xfs_inobt_get_rec( return 0; } -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_inobt_increment( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level in btree, 0 is leaf */ - int *stat) /* success/failure */ -{ - xfs_inobt_block_t *block; /* btree block */ - xfs_buf_t *bp; /* buffer containing btree block */ - int error; /* error return value */ - int lev; /* btree level */ - - ASSERT(level < cur->bc_nlevels); - /* - * Read-ahead to the right at this level. - */ - xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA); - /* - * Get a pointer to the btree block. - */ - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, bp))) - return error; -#endif - /* - * Increment the ptr at this level. If we're still in the block - * then we're done. - */ - if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) { - *stat = 1; - return 0; - } - /* - * If we just went off the right edge of the tree, return failure. - */ - if (be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK) { - *stat = 0; - return 0; - } - /* - * March up the tree incrementing pointers. - * Stop when we don't go off the right edge of a block. - */ - for (lev = level + 1; lev < cur->bc_nlevels; lev++) { - bp = cur->bc_bufs[lev]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, lev, bp))) - return error; -#endif - if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs)) - break; - /* - * Read-ahead the right block, we're going to read it - * in the next loop. - */ - xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA); - } - /* - * If we went off the root then we are seriously confused. - */ - ASSERT(lev < cur->bc_nlevels); - /* - * Now walk back down the tree, fixing up the cursor's buffer - * pointers and key numbers. - */ - for (bp = cur->bc_bufs[lev], block = XFS_BUF_TO_INOBT_BLOCK(bp); - lev > level; ) { - xfs_agblock_t agbno; /* block number of btree block */ - - agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, cur->bc_ptrs[lev], cur)); - if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp, - cur->bc_private.a.agno, agbno, 0, &bp, - XFS_INO_BTREE_REF))) - return error; - lev--; - xfs_btree_setbuf(cur, lev, bp); - block = XFS_BUF_TO_INOBT_BLOCK(bp); - if ((error = xfs_btree_check_sblock(cur, block, lev, bp))) - return error; - cur->bc_ptrs[lev] = 1; - } - *stat = 1; - return 0; -} - /* * Insert the current record at the point referenced by cur. * The cursor may be inconsistent on return if splits have been done. diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index eea409349eb..07fed62bcb7 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -135,12 +135,6 @@ extern int xfs_inobt_delete(struct xfs_btree_cur *cur, int *stat); extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino, __int32_t *fcnt, xfs_inofree_t *free, int *stat); -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -extern int xfs_inobt_increment(struct xfs_btree_cur *cur, int level, int *stat); - /* * Insert the current record at the point referenced by cur. * The cursor may be inconsistent on return if splits have been done. diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index a5f02f0e4c2..42a214b8df9 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -471,7 +471,7 @@ xfs_bulkstat( * In any case, increment to the next record. */ if (!error) - error = xfs_inobt_increment(cur, 0, &tmp); + error = xfs_btree_increment(cur, 0, &tmp); } else { /* * Start of ag. Lookup the first inode chunk. @@ -538,7 +538,7 @@ xfs_bulkstat( * Set agino to after this chunk and bump the cursor. */ agino = gino + XFS_INODES_PER_CHUNK; - error = xfs_inobt_increment(cur, 0, &tmp); + error = xfs_btree_increment(cur, 0, &tmp); cond_resched(); } /* @@ -885,7 +885,7 @@ xfs_inumbers( bufidx = 0; } if (left) { - error = xfs_inobt_increment(cur, 0, &tmp); + error = xfs_btree_increment(cur, 0, &tmp); if (error) { xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); cur = NULL; -- cgit v1.2.3-70-g09d2 From 8df4da4a0a642d3a016028c0d922bcb4d5a4a6d7 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:55:58 +1100 Subject: [XFS] implement generic xfs_btree_decrement From: Dave Chinner [hch: split out from bigger patch and minor adaptions] SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32191a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 12 +++--- fs/xfs/xfs_alloc_btree.c | 98 ++++------------------------------------------ fs/xfs/xfs_alloc_btree.h | 6 --- fs/xfs/xfs_bmap.c | 14 +++---- fs/xfs/xfs_bmap_btree.c | 90 ++++-------------------------------------- fs/xfs/xfs_bmap_btree.h | 1 - fs/xfs/xfs_btree.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 1 + fs/xfs/xfs_ialloc.c | 4 +- fs/xfs/xfs_ialloc_btree.c | 98 ++++------------------------------------------ fs/xfs/xfs_ialloc_btree.h | 6 --- 11 files changed, 137 insertions(+), 292 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index b8bb694b7da..7ca6903e235 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -961,7 +961,7 @@ xfs_alloc_ag_vextent_near( args->minlen, <bnoa, <lena); if (ltlena >= args->minlen) break; - if ((error = xfs_alloc_decrement(bno_cur_lt, 0, &i))) + if ((error = xfs_btree_decrement(bno_cur_lt, 0, &i))) goto error0; if (!i) { xfs_btree_del_cursor(bno_cur_lt, @@ -1162,7 +1162,7 @@ xfs_alloc_ag_vextent_near( /* * Fell off the left end. */ - if ((error = xfs_alloc_decrement( + if ((error = xfs_btree_decrement( bno_cur_lt, 0, &i))) goto error0; if (!i) { @@ -1321,7 +1321,7 @@ xfs_alloc_ag_vextent_size( bestflen = flen; bestfbno = fbno; for (;;) { - if ((error = xfs_alloc_decrement(cnt_cur, 0, &i))) + if ((error = xfs_btree_decrement(cnt_cur, 0, &i))) goto error0; if (i == 0) break; @@ -1416,7 +1416,7 @@ xfs_alloc_ag_vextent_small( xfs_extlen_t flen; int i; - if ((error = xfs_alloc_decrement(ccur, 0, &i))) + if ((error = xfs_btree_decrement(ccur, 0, &i))) goto error0; if (i) { if ((error = xfs_alloc_get_rec(ccur, &fbno, &flen, &i))) @@ -1607,7 +1607,7 @@ xfs_free_ag_extent( /* * Move the by-block cursor back to the left neighbor. */ - if ((error = xfs_alloc_decrement(bno_cur, 0, &i))) + if ((error = xfs_btree_decrement(bno_cur, 0, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); #ifdef DEBUG @@ -1653,7 +1653,7 @@ xfs_free_ag_extent( * Back up the by-block cursor to the left neighbor, and * update its length. */ - if ((error = xfs_alloc_decrement(bno_cur, 0, &i))) + if ((error = xfs_btree_decrement(bno_cur, 0, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); nbno = ltbno; diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index febc2d5ea29..6b45481ad5b 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -256,7 +256,7 @@ xfs_alloc_delrec( xfs_btree_setbuf(cur, level, NULL); cur->bc_nlevels--; } else if (level > 0 && - (error = xfs_alloc_decrement(cur, level, &i))) + (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; return 0; @@ -272,7 +272,7 @@ xfs_alloc_delrec( * the minimum, we're done. */ if (numrecs >= XFS_ALLOC_BLOCK_MINRECS(level, cur)) { - if (level > 0 && (error = xfs_alloc_decrement(cur, level, &i))) + if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; return 0; @@ -336,7 +336,7 @@ xfs_alloc_delrec( xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); if (level > 0 && - (error = xfs_alloc_decrement(cur, level, + (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; @@ -352,7 +352,7 @@ xfs_alloc_delrec( if (lbno != NULLAGBLOCK) { i = xfs_btree_firstrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_decrement(tcur, level, &i))) + if ((error = xfs_btree_decrement(tcur, level, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); } @@ -368,7 +368,7 @@ xfs_alloc_delrec( */ i = xfs_btree_firstrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_decrement(tcur, level, &i))) + if ((error = xfs_btree_decrement(tcur, level, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); xfs_btree_firstrec(tcur, level); @@ -468,7 +468,7 @@ xfs_alloc_delrec( * Just return. This is probably a logic error, but it's not fatal. */ else { - if (level > 0 && (error = xfs_alloc_decrement(cur, level, &i))) + if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; return 0; @@ -1779,90 +1779,6 @@ xfs_alloc_updkey( * Externally visible routines. */ -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_alloc_decrement( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level in btree, 0 is leaf */ - int *stat) /* success/failure */ -{ - xfs_alloc_block_t *block; /* btree block */ - int error; /* error return value */ - int lev; /* btree level */ - - ASSERT(level < cur->bc_nlevels); - /* - * Read-ahead to the left at this level. - */ - xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA); - /* - * Decrement the ptr at this level. If we're still in the block - * then we're done. - */ - if (--cur->bc_ptrs[level] > 0) { - *stat = 1; - return 0; - } - /* - * Get a pointer to the btree block. - */ - block = XFS_BUF_TO_ALLOC_BLOCK(cur->bc_bufs[level]); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, - cur->bc_bufs[level]))) - return error; -#endif - /* - * If we just went off the left edge of the tree, return failure. - */ - if (be32_to_cpu(block->bb_leftsib) == NULLAGBLOCK) { - *stat = 0; - return 0; - } - /* - * March up the tree decrementing pointers. - * Stop when we don't go off the left edge of a block. - */ - for (lev = level + 1; lev < cur->bc_nlevels; lev++) { - if (--cur->bc_ptrs[lev] > 0) - break; - /* - * Read-ahead the left block, we're going to read it - * in the next loop. - */ - xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA); - } - /* - * If we went off the root then we are seriously confused. - */ - ASSERT(lev < cur->bc_nlevels); - /* - * Now walk back down the tree, fixing up the cursor's buffer - * pointers and key numbers. - */ - for (block = XFS_BUF_TO_ALLOC_BLOCK(cur->bc_bufs[lev]); lev > level; ) { - xfs_agblock_t agbno; /* block number of btree block */ - xfs_buf_t *bp; /* buffer pointer for block */ - - agbno = be32_to_cpu(*XFS_ALLOC_PTR_ADDR(block, cur->bc_ptrs[lev], cur)); - if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp, - cur->bc_private.a.agno, agbno, 0, &bp, - XFS_ALLOC_BTREE_REF))) - return error; - lev--; - xfs_btree_setbuf(cur, lev, bp); - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - if ((error = xfs_btree_check_sblock(cur, block, lev, bp))) - return error; - cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs); - } - *stat = 1; - return 0; -} - /* * Delete the record pointed to by cur. * The cursor refers to the place where the record was (could be inserted) @@ -1889,7 +1805,7 @@ xfs_alloc_delete( if (i == 0) { for (level = 1; level < cur->bc_nlevels; level++) { if (cur->bc_ptrs[level] == 0) { - if ((error = xfs_alloc_decrement(cur, level, &i))) + if ((error = xfs_btree_decrement(cur, level, &i))) return error; break; } diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 643cfabbf67..b59d7fc78fe 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -94,12 +94,6 @@ typedef struct xfs_btree_sblock xfs_alloc_block_t; #define XFS_ALLOC_PTR_ADDR(bb,i,cur) \ XFS_BTREE_PTR_ADDR(xfs_alloc, bb, i, XFS_ALLOC_BLOCK_MAXRECS(1, cur)) -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -extern int xfs_alloc_decrement(struct xfs_btree_cur *cur, int level, int *stat); - /* * Delete the record pointed to by cur. * The cursor refers to the place where the record was (could be inserted) diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 4b1ec44c80a..bdbab54948f 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -820,7 +820,7 @@ xfs_bmap_add_extent_delay_real( if ((error = xfs_bmbt_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, @@ -1381,13 +1381,13 @@ xfs_bmap_add_extent_unwritten_real( if ((error = xfs_bmbt_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_bmbt_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, @@ -1430,7 +1430,7 @@ xfs_bmap_add_extent_unwritten_real( if ((error = xfs_bmbt_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, @@ -1473,7 +1473,7 @@ xfs_bmap_add_extent_unwritten_real( if ((error = xfs_bmbt_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_bmbt_update(cur, new->br_startoff, @@ -1556,7 +1556,7 @@ xfs_bmap_add_extent_unwritten_real( PREV.br_blockcount - new->br_blockcount, oldext))) goto done; - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; if (xfs_bmbt_update(cur, LEFT.br_startoff, LEFT.br_startblock, @@ -2108,7 +2108,7 @@ xfs_bmap_add_extent_hole_real( if ((error = xfs_bmbt_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_decrement(cur, 0, &i))) + if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_bmbt_update(cur, left.br_startoff, diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 2d29a4980cf..7b5181d34a5 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -203,7 +203,7 @@ xfs_bmbt_delrec( XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } - if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) { + if (level > 0 && (error = xfs_btree_decrement(cur, level, &j))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -216,7 +216,7 @@ xfs_bmbt_delrec( goto error0; } if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) { - if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &j))) { + if (level > 0 && (error = xfs_btree_decrement(cur, level, &j))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -237,7 +237,7 @@ xfs_bmbt_delrec( XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } - if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) { + if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -282,7 +282,7 @@ xfs_bmbt_delrec( xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); tcur = NULL; if (level > 0) { - if ((error = xfs_bmbt_decrement(cur, + if ((error = xfs_btree_decrement(cur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); @@ -298,7 +298,7 @@ xfs_bmbt_delrec( if (lbno != NULLFSBLOCK) { i = xfs_btree_firstrec(tcur, level); XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_bmbt_decrement(tcur, level, &i))) { + if ((error = xfs_btree_decrement(tcur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -311,7 +311,7 @@ xfs_bmbt_delrec( /* * decrement to last in block */ - if ((error = xfs_bmbt_decrement(tcur, level, &i))) { + if ((error = xfs_btree_decrement(tcur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -383,7 +383,7 @@ xfs_bmbt_delrec( } lrecs = be16_to_cpu(left->bb_numrecs); } else { - if (level > 0 && (error = xfs_bmbt_decrement(cur, level, &i))) { + if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); goto error0; } @@ -1486,80 +1486,6 @@ xfs_bmdr_to_bmbt( memcpy(tpp, fpp, sizeof(*fpp) * dmxr); } -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_bmbt_decrement( - xfs_btree_cur_t *cur, - int level, - int *stat) /* success/failure */ -{ - xfs_bmbt_block_t *block; - xfs_buf_t *bp; - int error; /* error return value */ - xfs_fsblock_t fsbno; - int lev; - xfs_mount_t *mp; - xfs_trans_t *tp; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGI(cur, level); - ASSERT(level < cur->bc_nlevels); - - xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA); - - if (--cur->bc_ptrs[level] > 0) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - block = xfs_bmbt_get_block(cur, level, &bp); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, block, level, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } -#endif - if (be64_to_cpu(block->bb_leftsib) == NULLDFSBNO) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - for (lev = level + 1; lev < cur->bc_nlevels; lev++) { - if (--cur->bc_ptrs[lev] > 0) - break; - xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA); - } - if (lev == cur->bc_nlevels) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - tp = cur->bc_tp; - mp = cur->bc_mp; - for (block = xfs_bmbt_get_block(cur, lev, &bp); lev > level; ) { - fsbno = be64_to_cpu(*XFS_BMAP_PTR_IADDR(block, cur->bc_ptrs[lev], cur)); - if ((error = xfs_btree_read_bufl(mp, tp, fsbno, 0, &bp, - XFS_BMAP_BTREE_REF))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - lev--; - xfs_btree_setbuf(cur, lev, bp); - block = XFS_BUF_TO_BMBT_BLOCK(bp); - if ((error = xfs_btree_check_lblock(cur, block, lev, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs); - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; -} - /* * Delete the record pointed to by cur. */ @@ -1582,7 +1508,7 @@ xfs_bmbt_delete( if (i == 0) { for (level = 1; level < cur->bc_nlevels; level++) { if (cur->bc_ptrs[level] == 0) { - if ((error = xfs_bmbt_decrement(cur, level, + if ((error = xfs_btree_decrement(cur, level, &i))) { XFS_BMBT_TRACE_CURSOR(cur, ERROR); return error; diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index a45be38d9a3..1e0f1d10505 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -237,7 +237,6 @@ typedef struct xfs_btree_lblock xfs_bmbt_block_t; * Prototypes for xfs_bmap.c to call. */ extern void xfs_bmdr_to_bmbt(xfs_bmdr_block_t *, int, xfs_bmbt_block_t *, int); -extern int xfs_bmbt_decrement(struct xfs_btree_cur *, int, int *); extern int xfs_bmbt_delete(struct xfs_btree_cur *, int *); extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); extern xfs_bmbt_block_t *xfs_bmbt_get_block(struct xfs_btree_cur *cur, diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index e9ab86b7990..3d561f8f78d 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -1171,3 +1171,102 @@ error0: XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); return error; } + +/* + * Decrement cursor by one record at the level. + * For nonzero levels the leaf-ward information is untouched. + */ +int /* error */ +xfs_btree_decrement( + struct xfs_btree_cur *cur, + int level, + int *stat) /* success/failure */ +{ + struct xfs_btree_block *block; + xfs_buf_t *bp; + int error; /* error return value */ + int lev; + union xfs_btree_ptr ptr; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGI(cur, level); + + ASSERT(level < cur->bc_nlevels); + + /* Read-ahead to the left at this level. */ + xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA); + + /* We're done if we remain in the block after the decrement. */ + if (--cur->bc_ptrs[level] > 0) + goto out1; + + /* Get a pointer to the btree block. */ + block = xfs_btree_get_block(cur, level, &bp); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, level, bp); + if (error) + goto error0; +#endif + + /* Fail if we just went off the left edge of the tree. */ + xfs_btree_get_sibling(cur, block, &ptr, XFS_BB_LEFTSIB); + if (xfs_btree_ptr_is_null(cur, &ptr)) + goto out0; + + XFS_BTREE_STATS_INC(cur, decrement); + + /* + * March up the tree decrementing pointers. + * Stop when we don't go off the left edge of a block. + */ + for (lev = level + 1; lev < cur->bc_nlevels; lev++) { + if (--cur->bc_ptrs[lev] > 0) + break; + /* Read-ahead the left block for the next loop. */ + xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA); + } + + /* + * If we went off the root then we are seriously confused. + * or the root of the tree is in an inode. + */ + if (lev == cur->bc_nlevels) { + if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) + goto out0; + ASSERT(0); + error = EFSCORRUPTED; + goto error0; + } + ASSERT(lev < cur->bc_nlevels); + + /* + * Now walk back down the tree, fixing up the cursor's buffer + * pointers and key numbers. + */ + for (block = xfs_btree_get_block(cur, lev, &bp); lev > level; ) { + union xfs_btree_ptr *ptrp; + + ptrp = xfs_btree_ptr_addr(cur, cur->bc_ptrs[lev], block); + error = xfs_btree_read_buf_block(cur, ptrp, --lev, + 0, &block, &bp); + if (error) + goto error0; + xfs_btree_setbuf(cur, lev, bp); + cur->bc_ptrs[lev] = xfs_btree_get_numrecs(block); + } +out1: + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 1; + return 0; + +out0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 0; + return 0; + +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} + diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index f5a4b8ec4cd..52b2da6ab32 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -506,6 +506,7 @@ xfs_btree_setbuf( * Common btree core entry points. */ int xfs_btree_increment(struct xfs_btree_cur *, int, int *); +int xfs_btree_decrement(struct xfs_btree_cur *, int, int *); /* * Helpers. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 3a8f0670e07..d36b42bf3ff 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -739,7 +739,7 @@ nextag: /* * Search left with tcur, back up 1 record. */ - if ((error = xfs_inobt_decrement(tcur, 0, &i))) + if ((error = xfs_btree_decrement(tcur, 0, &i))) goto error1; doneleft = !i; if (!doneleft) { @@ -815,7 +815,7 @@ nextag: * further left. */ if (useleft) { - if ((error = xfs_inobt_decrement(tcur, 0, + if ((error = xfs_btree_decrement(tcur, 0, &i))) goto error1; doneleft = !i; diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 41717da6369..9099a32f997 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -205,7 +205,7 @@ xfs_inobt_delrec( cur->bc_bufs[level] = NULL; cur->bc_nlevels--; } else if (level > 0 && - (error = xfs_inobt_decrement(cur, level, &i))) + (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; return 0; @@ -222,7 +222,7 @@ xfs_inobt_delrec( */ if (numrecs >= XFS_INOBT_BLOCK_MINRECS(level, cur)) { if (level > 0 && - (error = xfs_inobt_decrement(cur, level, &i))) + (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; return 0; @@ -286,7 +286,7 @@ xfs_inobt_delrec( xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); if (level > 0 && - (error = xfs_inobt_decrement(cur, level, + (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; @@ -301,7 +301,7 @@ xfs_inobt_delrec( rrecs = be16_to_cpu(right->bb_numrecs); if (lbno != NULLAGBLOCK) { xfs_btree_firstrec(tcur, level); - if ((error = xfs_inobt_decrement(tcur, level, &i))) + if ((error = xfs_btree_decrement(tcur, level, &i))) goto error0; } } @@ -315,7 +315,7 @@ xfs_inobt_delrec( * previous block. */ xfs_btree_firstrec(tcur, level); - if ((error = xfs_inobt_decrement(tcur, level, &i))) + if ((error = xfs_btree_decrement(tcur, level, &i))) goto error0; xfs_btree_firstrec(tcur, level); /* @@ -414,7 +414,7 @@ xfs_inobt_delrec( * Just return. This is probably a logic error, but it's not fatal. */ else { - if (level > 0 && (error = xfs_inobt_decrement(cur, level, &i))) + if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) return error; *stat = 1; return 0; @@ -1655,90 +1655,6 @@ xfs_inobt_updkey( * Externally visible routines. */ -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_inobt_decrement( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level in btree, 0 is leaf */ - int *stat) /* success/failure */ -{ - xfs_inobt_block_t *block; /* btree block */ - int error; - int lev; /* btree level */ - - ASSERT(level < cur->bc_nlevels); - /* - * Read-ahead to the left at this level. - */ - xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA); - /* - * Decrement the ptr at this level. If we're still in the block - * then we're done. - */ - if (--cur->bc_ptrs[level] > 0) { - *stat = 1; - return 0; - } - /* - * Get a pointer to the btree block. - */ - block = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[level]); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, - cur->bc_bufs[level]))) - return error; -#endif - /* - * If we just went off the left edge of the tree, return failure. - */ - if (be32_to_cpu(block->bb_leftsib) == NULLAGBLOCK) { - *stat = 0; - return 0; - } - /* - * March up the tree decrementing pointers. - * Stop when we don't go off the left edge of a block. - */ - for (lev = level + 1; lev < cur->bc_nlevels; lev++) { - if (--cur->bc_ptrs[lev] > 0) - break; - /* - * Read-ahead the left block, we're going to read it - * in the next loop. - */ - xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA); - } - /* - * If we went off the root then we are seriously confused. - */ - ASSERT(lev < cur->bc_nlevels); - /* - * Now walk back down the tree, fixing up the cursor's buffer - * pointers and key numbers. - */ - for (block = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[lev]); lev > level; ) { - xfs_agblock_t agbno; /* block number of btree block */ - xfs_buf_t *bp; /* buffer containing btree block */ - - agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, cur->bc_ptrs[lev], cur)); - if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp, - cur->bc_private.a.agno, agbno, 0, &bp, - XFS_INO_BTREE_REF))) - return error; - lev--; - xfs_btree_setbuf(cur, lev, bp); - block = XFS_BUF_TO_INOBT_BLOCK(bp); - if ((error = xfs_btree_check_sblock(cur, block, lev, bp))) - return error; - cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs); - } - *stat = 1; - return 0; -} - /* * Delete the record pointed to by cur. * The cursor refers to the place where the record was (could be inserted) @@ -1765,7 +1681,7 @@ xfs_inobt_delete( if (i == 0) { for (level = 1; level < cur->bc_nlevels; level++) { if (cur->bc_ptrs[level] == 0) { - if ((error = xfs_inobt_decrement(cur, level, &i))) + if ((error = xfs_btree_decrement(cur, level, &i))) return error; break; } diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 07fed62bcb7..84554595d28 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -116,12 +116,6 @@ typedef struct xfs_btree_sblock xfs_inobt_block_t; (XFS_BTREE_PTR_ADDR(xfs_inobt, bb, \ i, XFS_INOBT_BLOCK_MAXRECS(1, cur))) -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -extern int xfs_inobt_decrement(struct xfs_btree_cur *cur, int level, int *stat); - /* * Delete the record pointed to by cur. * The cursor refers to the place where the record was (could be inserted) -- cgit v1.2.3-70-g09d2 From fe033cc848489851f0c7de48f0b1bab5d744ad8a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:56:09 +1100 Subject: [XFS] implement generic xfs_btree_lookup From: Dave Chinner [hch: split out from bigger patch and minor adaptions] SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32192a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 48 +++++++ fs/xfs/xfs_alloc_btree.c | 312 +++++++--------------------------------------- fs/xfs/xfs_alloc_btree.h | 20 --- fs/xfs/xfs_bmap.c | 29 +++++ fs/xfs/xfs_bmap_btree.c | 197 +++++------------------------ fs/xfs/xfs_bmap_btree.h | 4 - fs/xfs/xfs_btree.c | 219 ++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 11 ++ fs/xfs/xfs_ialloc.c | 53 ++++++++ fs/xfs/xfs_ialloc.h | 15 +++ fs/xfs/xfs_ialloc_btree.c | 294 ++++++------------------------------------- fs/xfs/xfs_ialloc_btree.h | 20 --- 12 files changed, 487 insertions(+), 735 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 7ca6903e235..6bda0ae26c2 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -89,6 +89,54 @@ STATIC int xfs_alloc_ag_vextent_small(xfs_alloc_arg_t *, * Internal functions. */ +/* + * Lookup the record equal to [bno, len] in the btree given by cur. + */ +STATIC int /* error */ +xfs_alloc_lookup_eq( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len, /* length of extent */ + int *stat) /* success/failure */ +{ + cur->bc_rec.a.ar_startblock = bno; + cur->bc_rec.a.ar_blockcount = len; + return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); +} + +/* + * Lookup the first record greater than or equal to [bno, len] + * in the btree given by cur. + */ +STATIC int /* error */ +xfs_alloc_lookup_ge( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len, /* length of extent */ + int *stat) /* success/failure */ +{ + cur->bc_rec.a.ar_startblock = bno; + cur->bc_rec.a.ar_blockcount = len; + return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); +} + +/* + * Lookup the first record less than or equal to [bno, len] + * in the btree given by cur. + */ +STATIC int /* error */ +xfs_alloc_lookup_le( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len, /* length of extent */ + int *stat) /* success/failure */ +{ + cur->bc_rec.a.ar_startblock = bno; + cur->bc_rec.a.ar_blockcount = len; + return xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat); +} + + /* * Compute aligned version of the found extent. * Takes alignment and min length into account. diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index 6b45481ad5b..b81fbf1216e 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -937,223 +937,6 @@ xfs_alloc_log_recs( xfs_trans_log_buf(cur->bc_tp, bp, first, last); } -/* - * Lookup the record. The cursor is made to point to it, based on dir. - * Return 0 if can't find any such record, 1 for success. - */ -STATIC int /* error */ -xfs_alloc_lookup( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_lookup_t dir, /* <=, ==, or >= */ - int *stat) /* success/failure */ -{ - xfs_agblock_t agbno; /* a.g. relative btree block number */ - xfs_agnumber_t agno; /* allocation group number */ - xfs_alloc_block_t *block=NULL; /* current btree block */ - int diff; /* difference for the current key */ - int error; /* error return value */ - int keyno=0; /* current key number */ - int level; /* level in the btree */ - xfs_mount_t *mp; /* file system mount point */ - - XFS_STATS_INC(xs_abt_lookup); - /* - * Get the allocation group header, and the root block number. - */ - mp = cur->bc_mp; - - { - xfs_agf_t *agf; /* a.g. freespace header */ - - agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); - agno = be32_to_cpu(agf->agf_seqno); - agbno = be32_to_cpu(agf->agf_roots[cur->bc_btnum]); - } - /* - * Iterate over each level in the btree, starting at the root. - * For each level above the leaves, find the key we need, based - * on the lookup record, then follow the corresponding block - * pointer down to the next level. - */ - for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) { - xfs_buf_t *bp; /* buffer pointer for btree block */ - xfs_daddr_t d; /* disk address of btree block */ - - /* - * Get the disk address we're looking for. - */ - d = XFS_AGB_TO_DADDR(mp, agno, agbno); - /* - * If the old buffer at this level is for a different block, - * throw it away, otherwise just use it. - */ - bp = cur->bc_bufs[level]; - if (bp && XFS_BUF_ADDR(bp) != d) - bp = NULL; - if (!bp) { - /* - * Need to get a new buffer. Read it, then - * set it in the cursor, releasing the old one. - */ - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, agno, - agbno, 0, &bp, XFS_ALLOC_BTREE_REF))) - return error; - xfs_btree_setbuf(cur, level, bp); - /* - * Point to the btree block, now that we have the buffer - */ - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - if ((error = xfs_btree_check_sblock(cur, block, level, - bp))) - return error; - } else - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - /* - * If we already had a key match at a higher level, we know - * we need to use the first entry in this block. - */ - if (diff == 0) - keyno = 1; - /* - * Otherwise we need to search this block. Do a binary search. - */ - else { - int high; /* high entry number */ - xfs_alloc_key_t *kkbase=NULL;/* base of keys in block */ - xfs_alloc_rec_t *krbase=NULL;/* base of records in block */ - int low; /* low entry number */ - - /* - * Get a pointer to keys or records. - */ - if (level > 0) - kkbase = XFS_ALLOC_KEY_ADDR(block, 1, cur); - else - krbase = XFS_ALLOC_REC_ADDR(block, 1, cur); - /* - * Set low and high entry numbers, 1-based. - */ - low = 1; - if (!(high = be16_to_cpu(block->bb_numrecs))) { - /* - * If the block is empty, the tree must - * be an empty leaf. - */ - ASSERT(level == 0 && cur->bc_nlevels == 1); - cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE; - *stat = 0; - return 0; - } - /* - * Binary search the block. - */ - while (low <= high) { - xfs_extlen_t blockcount; /* key value */ - xfs_agblock_t startblock; /* key value */ - - XFS_STATS_INC(xs_abt_compare); - /* - * keyno is average of low and high. - */ - keyno = (low + high) >> 1; - /* - * Get startblock & blockcount. - */ - if (level > 0) { - xfs_alloc_key_t *kkp; - - kkp = kkbase + keyno - 1; - startblock = be32_to_cpu(kkp->ar_startblock); - blockcount = be32_to_cpu(kkp->ar_blockcount); - } else { - xfs_alloc_rec_t *krp; - - krp = krbase + keyno - 1; - startblock = be32_to_cpu(krp->ar_startblock); - blockcount = be32_to_cpu(krp->ar_blockcount); - } - /* - * Compute difference to get next direction. - */ - if (cur->bc_btnum == XFS_BTNUM_BNO) - diff = (int)startblock - - (int)cur->bc_rec.a.ar_startblock; - else if (!(diff = (int)blockcount - - (int)cur->bc_rec.a.ar_blockcount)) - diff = (int)startblock - - (int)cur->bc_rec.a.ar_startblock; - /* - * Less than, move right. - */ - if (diff < 0) - low = keyno + 1; - /* - * Greater than, move left. - */ - else if (diff > 0) - high = keyno - 1; - /* - * Equal, we're done. - */ - else - break; - } - } - /* - * If there are more levels, set up for the next level - * by getting the block number and filling in the cursor. - */ - if (level > 0) { - /* - * If we moved left, need the previous key number, - * unless there isn't one. - */ - if (diff > 0 && --keyno < 1) - keyno = 1; - agbno = be32_to_cpu(*XFS_ALLOC_PTR_ADDR(block, keyno, cur)); -#ifdef DEBUG - if ((error = xfs_btree_check_sptr(cur, agbno, level))) - return error; -#endif - cur->bc_ptrs[level] = keyno; - } - } - /* - * Done with the search. - * See if we need to adjust the results. - */ - if (dir != XFS_LOOKUP_LE && diff < 0) { - keyno++; - /* - * If ge search and we went off the end of the block, but it's - * not the last block, we're in the wrong block. - */ - if (dir == XFS_LOOKUP_GE && - keyno > be16_to_cpu(block->bb_numrecs) && - be32_to_cpu(block->bb_rightsib) != NULLAGBLOCK) { - int i; - - cur->bc_ptrs[0] = keyno; - if ((error = xfs_btree_increment(cur, 0, &i))) - return error; - XFS_WANT_CORRUPTED_RETURN(i == 1); - *stat = 1; - return 0; - } - } - else if (dir == XFS_LOOKUP_LE && diff > 0) - keyno--; - cur->bc_ptrs[0] = keyno; - /* - * Return if we succeeded or not. - */ - if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs)) - *stat = 0; - else - *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0)); - return 0; -} - /* * Move 1 record left from cur/level if possible. * Update cur to reflect the new path. @@ -1918,53 +1701,6 @@ xfs_alloc_insert( return 0; } -/* - * Lookup the record equal to [bno, len] in the btree given by cur. - */ -int /* error */ -xfs_alloc_lookup_eq( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agblock_t bno, /* starting block of extent */ - xfs_extlen_t len, /* length of extent */ - int *stat) /* success/failure */ -{ - cur->bc_rec.a.ar_startblock = bno; - cur->bc_rec.a.ar_blockcount = len; - return xfs_alloc_lookup(cur, XFS_LOOKUP_EQ, stat); -} - -/* - * Lookup the first record greater than or equal to [bno, len] - * in the btree given by cur. - */ -int /* error */ -xfs_alloc_lookup_ge( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agblock_t bno, /* starting block of extent */ - xfs_extlen_t len, /* length of extent */ - int *stat) /* success/failure */ -{ - cur->bc_rec.a.ar_startblock = bno; - cur->bc_rec.a.ar_blockcount = len; - return xfs_alloc_lookup(cur, XFS_LOOKUP_GE, stat); -} - -/* - * Lookup the first record less than or equal to [bno, len] - * in the btree given by cur. - */ -int /* error */ -xfs_alloc_lookup_le( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agblock_t bno, /* starting block of extent */ - xfs_extlen_t len, /* length of extent */ - int *stat) /* success/failure */ -{ - cur->bc_rec.a.ar_startblock = bno; - cur->bc_rec.a.ar_blockcount = len; - return xfs_alloc_lookup(cur, XFS_LOOKUP_LE, stat); -} - /* * Update the record referred to by cur, to the value given by [bno, len]. * This either works (return 0) or gets an EFSCORRUPTED error. @@ -2052,6 +1788,51 @@ xfs_allocbt_get_maxrecs( return cur->bc_mp->m_alloc_mxr[level != 0]; } +STATIC void +xfs_allocbt_init_key_from_rec( + union xfs_btree_key *key, + union xfs_btree_rec *rec) +{ + ASSERT(rec->alloc.ar_startblock != 0); + + key->alloc.ar_startblock = rec->alloc.ar_startblock; + key->alloc.ar_blockcount = rec->alloc.ar_blockcount; +} + +STATIC void +xfs_allocbt_init_ptr_from_cur( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr) +{ + struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); + + ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno)); + ASSERT(agf->agf_roots[cur->bc_btnum] != 0); + + ptr->s = agf->agf_roots[cur->bc_btnum]; +} + +STATIC __int64_t +xfs_allocbt_key_diff( + struct xfs_btree_cur *cur, + union xfs_btree_key *key) +{ + xfs_alloc_rec_incore_t *rec = &cur->bc_rec.a; + xfs_alloc_key_t *kp = &key->alloc; + __int64_t diff; + + if (cur->bc_btnum == XFS_BTNUM_BNO) { + return (__int64_t)be32_to_cpu(kp->ar_startblock) - + rec->ar_startblock; + } + + diff = (__int64_t)be32_to_cpu(kp->ar_blockcount) - rec->ar_blockcount; + if (diff) + return diff; + + return (__int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock; +} + #ifdef XFS_BTREE_TRACE ktrace_t *xfs_allocbt_trace_buf; @@ -2124,6 +1905,9 @@ static const struct xfs_btree_ops xfs_allocbt_ops = { .dup_cursor = xfs_allocbt_dup_cursor, .get_maxrecs = xfs_allocbt_get_maxrecs, + .init_key_from_rec = xfs_allocbt_init_key_from_rec, + .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur, + .key_diff = xfs_allocbt_key_diff, #ifdef XFS_BTREE_TRACE .trace_enter = xfs_allocbt_trace_enter, diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index b59d7fc78fe..aa110ff4feb 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -113,26 +113,6 @@ extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno, */ extern int xfs_alloc_insert(struct xfs_btree_cur *cur, int *stat); -/* - * Lookup the record equal to [bno, len] in the btree given by cur. - */ -extern int xfs_alloc_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len, int *stat); - -/* - * Lookup the first record greater than or equal to [bno, len] - * in the btree given by cur. - */ -extern int xfs_alloc_lookup_ge(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len, int *stat); - -/* - * Lookup the first record less than or equal to [bno, len] - * in the btree given by cur. - */ -extern int xfs_alloc_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len, int *stat); - /* * Update the record referred to by cur, to the value given by [bno, len]. * This either works (return 0) or gets an EFSCORRUPTED error. diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index bdbab54948f..1296b4102e9 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -402,6 +402,35 @@ xfs_bmap_disk_count_leaves( * Bmap internal routines. */ +STATIC int /* error */ +xfs_bmbt_lookup_eq( + struct xfs_btree_cur *cur, + xfs_fileoff_t off, + xfs_fsblock_t bno, + xfs_filblks_t len, + int *stat) /* success/failure */ +{ + cur->bc_rec.b.br_startoff = off; + cur->bc_rec.b.br_startblock = bno; + cur->bc_rec.b.br_blockcount = len; + return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); +} + +STATIC int /* error */ +xfs_bmbt_lookup_ge( + struct xfs_btree_cur *cur, + xfs_fileoff_t off, + xfs_fsblock_t bno, + xfs_filblks_t len, + int *stat) /* success/failure */ +{ + cur->bc_rec.b.br_startoff = off; + cur->bc_rec.b.br_startblock = bno; + cur->bc_rec.b.br_blockcount = len; + return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); +} + + /* * Called from xfs_bmap_add_attrfork to handle btree format files. */ diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 7b5181d34a5..8403d154ae0 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -812,146 +812,6 @@ xfs_bmbt_log_ptrs( XFS_BMBT_TRACE_CURSOR(cur, EXIT); } -/* - * Lookup the record. The cursor is made to point to it, based on dir. - */ -STATIC int /* error */ -xfs_bmbt_lookup( - xfs_btree_cur_t *cur, - xfs_lookup_t dir, - int *stat) /* success/failure */ -{ - xfs_bmbt_block_t *block=NULL; - xfs_buf_t *bp; - xfs_daddr_t d; - xfs_sfiloff_t diff; - int error; /* error return value */ - xfs_fsblock_t fsbno=0; - int high; - int i; - int keyno=0; - xfs_bmbt_key_t *kkbase=NULL; - xfs_bmbt_key_t *kkp; - xfs_bmbt_rec_t *krbase=NULL; - xfs_bmbt_rec_t *krp; - int level; - int low; - xfs_mount_t *mp; - xfs_bmbt_ptr_t *pp; - xfs_bmbt_irec_t *rp; - xfs_fileoff_t startoff; - xfs_trans_t *tp; - - XFS_STATS_INC(xs_bmbt_lookup); - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGI(cur, (int)dir); - tp = cur->bc_tp; - mp = cur->bc_mp; - rp = &cur->bc_rec.b; - for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) { - if (level < cur->bc_nlevels - 1) { - d = XFS_FSB_TO_DADDR(mp, fsbno); - bp = cur->bc_bufs[level]; - if (bp && XFS_BUF_ADDR(bp) != d) - bp = NULL; - if (!bp) { - if ((error = xfs_btree_read_bufl(mp, tp, fsbno, - 0, &bp, XFS_BMAP_BTREE_REF))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - xfs_btree_setbuf(cur, level, bp); - block = XFS_BUF_TO_BMBT_BLOCK(bp); - if ((error = xfs_btree_check_lblock(cur, block, - level, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - } else - block = XFS_BUF_TO_BMBT_BLOCK(bp); - } else - block = xfs_bmbt_get_block(cur, level, &bp); - if (diff == 0) - keyno = 1; - else { - if (level > 0) - kkbase = XFS_BMAP_KEY_IADDR(block, 1, cur); - else - krbase = XFS_BMAP_REC_IADDR(block, 1, cur); - low = 1; - if (!(high = be16_to_cpu(block->bb_numrecs))) { - ASSERT(level == 0); - cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE; - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - while (low <= high) { - XFS_STATS_INC(xs_bmbt_compare); - keyno = (low + high) >> 1; - if (level > 0) { - kkp = kkbase + keyno - 1; - startoff = be64_to_cpu(kkp->br_startoff); - } else { - krp = krbase + keyno - 1; - startoff = xfs_bmbt_disk_get_startoff(krp); - } - diff = (xfs_sfiloff_t) - (startoff - rp->br_startoff); - if (diff < 0) - low = keyno + 1; - else if (diff > 0) - high = keyno - 1; - else - break; - } - } - if (level > 0) { - if (diff > 0 && --keyno < 1) - keyno = 1; - pp = XFS_BMAP_PTR_IADDR(block, keyno, cur); - fsbno = be64_to_cpu(*pp); -#ifdef DEBUG - if ((error = xfs_btree_check_lptr(cur, fsbno, level))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } -#endif - cur->bc_ptrs[level] = keyno; - } - } - if (dir != XFS_LOOKUP_LE && diff < 0) { - keyno++; - /* - * If ge search and we went off the end of the block, but it's - * not the last block, we're in the wrong block. - */ - if (dir == XFS_LOOKUP_GE && keyno > be16_to_cpu(block->bb_numrecs) && - be64_to_cpu(block->bb_rightsib) != NULLDFSBNO) { - cur->bc_ptrs[0] = keyno; - if ((error = xfs_btree_increment(cur, 0, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - XFS_WANT_CORRUPTED_RETURN(i == 1); - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - } - else if (dir == XFS_LOOKUP_LE && diff > 0) - keyno--; - cur->bc_ptrs[0] = keyno; - if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs)) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - } else { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0)); - } - return 0; -} - /* * Move 1 record left from cur/level if possible. * Update cur to reflect the new path. @@ -1809,34 +1669,6 @@ xfs_bmbt_log_recs( XFS_BMBT_TRACE_CURSOR(cur, EXIT); } -int /* error */ -xfs_bmbt_lookup_eq( - xfs_btree_cur_t *cur, - xfs_fileoff_t off, - xfs_fsblock_t bno, - xfs_filblks_t len, - int *stat) /* success/failure */ -{ - cur->bc_rec.b.br_startoff = off; - cur->bc_rec.b.br_startblock = bno; - cur->bc_rec.b.br_blockcount = len; - return xfs_bmbt_lookup(cur, XFS_LOOKUP_EQ, stat); -} - -int /* error */ -xfs_bmbt_lookup_ge( - xfs_btree_cur_t *cur, - xfs_fileoff_t off, - xfs_fsblock_t bno, - xfs_filblks_t len, - int *stat) /* success/failure */ -{ - cur->bc_rec.b.br_startoff = off; - cur->bc_rec.b.br_startblock = bno; - cur->bc_rec.b.br_blockcount = len; - return xfs_bmbt_lookup(cur, XFS_LOOKUP_GE, stat); -} - /* * Give the bmap btree a new root block. Copy the old broot contents * down into a real block and make the broot point to it. @@ -2269,6 +2101,32 @@ xfs_bmbt_get_maxrecs( return XFS_BMAP_BLOCK_IMAXRECS(level, cur); } +STATIC void +xfs_bmbt_init_key_from_rec( + union xfs_btree_key *key, + union xfs_btree_rec *rec) +{ + key->bmbt.br_startoff = + cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); +} + +STATIC void +xfs_bmbt_init_ptr_from_cur( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr) +{ + ptr->l = 0; +} + +STATIC __int64_t +xfs_bmbt_key_diff( + struct xfs_btree_cur *cur, + union xfs_btree_key *key) +{ + return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - + cur->bc_rec.b.br_startoff; +} + #ifdef XFS_BTREE_TRACE ktrace_t *xfs_bmbt_trace_buf; @@ -2360,6 +2218,9 @@ static const struct xfs_btree_ops xfs_bmbt_ops = { .dup_cursor = xfs_bmbt_dup_cursor, .get_maxrecs = xfs_bmbt_get_maxrecs, + .init_key_from_rec = xfs_bmbt_init_key_from_rec, + .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, + .key_diff = xfs_bmbt_key_diff, #ifdef XFS_BTREE_TRACE .trace_enter = xfs_bmbt_trace_enter, diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index 1e0f1d10505..d04198cdc4b 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -254,10 +254,6 @@ extern int xfs_bmbt_insert(struct xfs_btree_cur *, int *); extern void xfs_bmbt_log_block(struct xfs_btree_cur *, struct xfs_buf *, int); extern void xfs_bmbt_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int, int); -extern int xfs_bmbt_lookup_eq(struct xfs_btree_cur *, xfs_fileoff_t, - xfs_fsblock_t, xfs_filblks_t, int *); -extern int xfs_bmbt_lookup_ge(struct xfs_btree_cur *, xfs_fileoff_t, - xfs_fsblock_t, xfs_filblks_t, int *); /* * Give the bmap btree a new root block. Copy the old broot contents diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 3d561f8f78d..41912a01bec 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -1270,3 +1270,222 @@ error0: return error; } + +STATIC int +xfs_btree_lookup_get_block( + struct xfs_btree_cur *cur, /* btree cursor */ + int level, /* level in the btree */ + union xfs_btree_ptr *pp, /* ptr to btree block */ + struct xfs_btree_block **blkp) /* return btree block */ +{ + struct xfs_buf *bp; /* buffer pointer for btree block */ + int error = 0; + + /* special case the root block if in an inode */ + if ((cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) && + (level == cur->bc_nlevels - 1)) { + *blkp = xfs_btree_get_iroot(cur); + return 0; + } + + /* + * If the old buffer at this level for the disk address we are + * looking for re-use it. + * + * Otherwise throw it away and get a new one. + */ + bp = cur->bc_bufs[level]; + if (bp && XFS_BUF_ADDR(bp) == xfs_btree_ptr_to_daddr(cur, pp)) { + *blkp = XFS_BUF_TO_BLOCK(bp); + return 0; + } + + error = xfs_btree_read_buf_block(cur, pp, level, 0, blkp, &bp); + if (error) + return error; + + xfs_btree_setbuf(cur, level, bp); + return 0; +} + +/* + * Get current search key. For level 0 we don't actually have a key + * structure so we make one up from the record. For all other levels + * we just return the right key. + */ +STATIC union xfs_btree_key * +xfs_lookup_get_search_key( + struct xfs_btree_cur *cur, + int level, + int keyno, + struct xfs_btree_block *block, + union xfs_btree_key *kp) +{ + if (level == 0) { + cur->bc_ops->init_key_from_rec(kp, + xfs_btree_rec_addr(cur, keyno, block)); + return kp; + } + + return xfs_btree_key_addr(cur, keyno, block); +} + +/* + * Lookup the record. The cursor is made to point to it, based on dir. + * Return 0 if can't find any such record, 1 for success. + */ +int /* error */ +xfs_btree_lookup( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_lookup_t dir, /* <=, ==, or >= */ + int *stat) /* success/failure */ +{ + struct xfs_btree_block *block; /* current btree block */ + __int64_t diff; /* difference for the current key */ + int error; /* error return value */ + int keyno; /* current key number */ + int level; /* level in the btree */ + union xfs_btree_ptr *pp; /* ptr to btree block */ + union xfs_btree_ptr ptr; /* ptr to btree block */ + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGI(cur, dir); + + XFS_BTREE_STATS_INC(cur, lookup); + + block = NULL; + keyno = 0; + + /* initialise start pointer from cursor */ + cur->bc_ops->init_ptr_from_cur(cur, &ptr); + pp = &ptr; + + /* + * Iterate over each level in the btree, starting at the root. + * For each level above the leaves, find the key we need, based + * on the lookup record, then follow the corresponding block + * pointer down to the next level. + */ + for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) { + /* Get the block we need to do the lookup on. */ + error = xfs_btree_lookup_get_block(cur, level, pp, &block); + if (error) + goto error0; + + if (diff == 0) { + /* + * If we already had a key match at a higher level, we + * know we need to use the first entry in this block. + */ + keyno = 1; + } else { + /* Otherwise search this block. Do a binary search. */ + + int high; /* high entry number */ + int low; /* low entry number */ + + /* Set low and high entry numbers, 1-based. */ + low = 1; + high = xfs_btree_get_numrecs(block); + if (!high) { + /* Block is empty, must be an empty leaf. */ + ASSERT(level == 0 && cur->bc_nlevels == 1); + + cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE; + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 0; + return 0; + } + + /* Binary search the block. */ + while (low <= high) { + union xfs_btree_key key; + union xfs_btree_key *kp; + + XFS_BTREE_STATS_INC(cur, compare); + + /* keyno is average of low and high. */ + keyno = (low + high) >> 1; + + /* Get current search key */ + kp = xfs_lookup_get_search_key(cur, level, + keyno, block, &key); + + /* + * Compute difference to get next direction: + * - less than, move right + * - greater than, move left + * - equal, we're done + */ + diff = cur->bc_ops->key_diff(cur, kp); + if (diff < 0) + low = keyno + 1; + else if (diff > 0) + high = keyno - 1; + else + break; + } + } + + /* + * If there are more levels, set up for the next level + * by getting the block number and filling in the cursor. + */ + if (level > 0) { + /* + * If we moved left, need the previous key number, + * unless there isn't one. + */ + if (diff > 0 && --keyno < 1) + keyno = 1; + pp = xfs_btree_ptr_addr(cur, keyno, block); + +#ifdef DEBUG + error = xfs_btree_check_ptr(cur, pp, 0, level); + if (error) + goto error0; +#endif + cur->bc_ptrs[level] = keyno; + } + } + + /* Done with the search. See if we need to adjust the results. */ + if (dir != XFS_LOOKUP_LE && diff < 0) { + keyno++; + /* + * If ge search and we went off the end of the block, but it's + * not the last block, we're in the wrong block. + */ + xfs_btree_get_sibling(cur, block, &ptr, XFS_BB_RIGHTSIB); + if (dir == XFS_LOOKUP_GE && + keyno > xfs_btree_get_numrecs(block) && + !xfs_btree_ptr_is_null(cur, &ptr)) { + int i; + + cur->bc_ptrs[0] = keyno; + error = xfs_btree_increment(cur, 0, &i); + if (error) + goto error0; + XFS_WANT_CORRUPTED_RETURN(i == 1); + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 1; + return 0; + } + } else if (dir == XFS_LOOKUP_LE && diff > 0) + keyno--; + cur->bc_ptrs[0] = keyno; + + /* Return if we succeeded or not. */ + if (keyno == 0 || keyno > xfs_btree_get_numrecs(block)) + *stat = 0; + else if (dir != XFS_LOOKUP_EQ || diff == 0) + *stat = 1; + else + *stat = 0; + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + return 0; + +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index 52b2da6ab32..c151175a5fd 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -190,6 +190,16 @@ struct xfs_btree_ops { /* records in block/level */ int (*get_maxrecs)(struct xfs_btree_cur *cur, int level); + /* init values of btree structures */ + void (*init_key_from_rec)(union xfs_btree_key *key, + union xfs_btree_rec *rec); + void (*init_ptr_from_cur)(struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr); + + /* difference between key value and cursor value */ + __int64_t (*key_diff)(struct xfs_btree_cur *cur, + union xfs_btree_key *key); + /* btree tracing */ #ifdef XFS_BTREE_TRACE void (*trace_enter)(struct xfs_btree_cur *, const char *, @@ -507,6 +517,7 @@ xfs_btree_setbuf( */ int xfs_btree_increment(struct xfs_btree_cur *, int, int *); int xfs_btree_decrement(struct xfs_btree_cur *, int, int *); +int xfs_btree_lookup(struct xfs_btree_cur *, xfs_lookup_t, int *); /* * Helpers. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index d36b42bf3ff..bbf537f64c4 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -118,6 +118,59 @@ xfs_ialloc_cluster_alignment( return 1; } +/* + * Lookup the record equal to ino in the btree given by cur. + */ +STATIC int /* error */ +xfs_inobt_lookup_eq( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agino_t ino, /* starting inode of chunk */ + __int32_t fcnt, /* free inode count */ + xfs_inofree_t free, /* free inode mask */ + int *stat) /* success/failure */ +{ + cur->bc_rec.i.ir_startino = ino; + cur->bc_rec.i.ir_freecount = fcnt; + cur->bc_rec.i.ir_free = free; + return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); +} + +/* + * Lookup the first record greater than or equal to ino + * in the btree given by cur. + */ +int /* error */ +xfs_inobt_lookup_ge( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agino_t ino, /* starting inode of chunk */ + __int32_t fcnt, /* free inode count */ + xfs_inofree_t free, /* free inode mask */ + int *stat) /* success/failure */ +{ + cur->bc_rec.i.ir_startino = ino; + cur->bc_rec.i.ir_freecount = fcnt; + cur->bc_rec.i.ir_free = free; + return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); +} + +/* + * Lookup the first record less than or equal to ino + * in the btree given by cur. + */ +int /* error */ +xfs_inobt_lookup_le( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agino_t ino, /* starting inode of chunk */ + __int32_t fcnt, /* free inode count */ + xfs_inofree_t free, /* free inode mask */ + int *stat) /* success/failure */ +{ + cur->bc_rec.i.ir_startino = ino; + cur->bc_rec.i.ir_freecount = fcnt; + cur->bc_rec.i.ir_free = free; + return xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat); +} + /* * Allocate new inodes in the allocation group specified by agbp. * Return 0 for success, else error code. diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h index 4e30ec1d13b..4026578bc26 100644 --- a/fs/xfs/xfs_ialloc.h +++ b/fs/xfs/xfs_ialloc.h @@ -154,6 +154,21 @@ xfs_ialloc_pagi_init( struct xfs_trans *tp, /* transaction pointer */ xfs_agnumber_t agno); /* allocation group number */ +/* + * Lookup the first record greater than or equal to ino + * in the btree given by cur. + */ +int xfs_inobt_lookup_ge(struct xfs_btree_cur *cur, xfs_agino_t ino, + __int32_t fcnt, xfs_inofree_t free, int *stat); + +/* + * Lookup the first record less than or equal to ino + * in the btree given by cur. + */ +int xfs_inobt_lookup_le(struct xfs_btree_cur *cur, xfs_agino_t ino, + __int32_t fcnt, xfs_inofree_t free, int *stat); + + #endif /* __KERNEL__ */ #endif /* __XFS_IALLOC_H__ */ diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 9099a32f997..161c3b2e245 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -828,212 +828,6 @@ xfs_inobt_log_recs( xfs_trans_log_buf(cur->bc_tp, bp, first, last); } -/* - * Lookup the record. The cursor is made to point to it, based on dir. - * Return 0 if can't find any such record, 1 for success. - */ -STATIC int /* error */ -xfs_inobt_lookup( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_lookup_t dir, /* <=, ==, or >= */ - int *stat) /* success/failure */ -{ - xfs_agblock_t agbno; /* a.g. relative btree block number */ - xfs_agnumber_t agno; /* allocation group number */ - xfs_inobt_block_t *block=NULL; /* current btree block */ - __int64_t diff; /* difference for the current key */ - int error; /* error return value */ - int keyno=0; /* current key number */ - int level; /* level in the btree */ - xfs_mount_t *mp; /* file system mount point */ - - /* - * Get the allocation group header, and the root block number. - */ - mp = cur->bc_mp; - { - xfs_agi_t *agi; /* a.g. inode header */ - - agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp); - agno = be32_to_cpu(agi->agi_seqno); - agbno = be32_to_cpu(agi->agi_root); - } - /* - * Iterate over each level in the btree, starting at the root. - * For each level above the leaves, find the key we need, based - * on the lookup record, then follow the corresponding block - * pointer down to the next level. - */ - for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) { - xfs_buf_t *bp; /* buffer pointer for btree block */ - xfs_daddr_t d; /* disk address of btree block */ - - /* - * Get the disk address we're looking for. - */ - d = XFS_AGB_TO_DADDR(mp, agno, agbno); - /* - * If the old buffer at this level is for a different block, - * throw it away, otherwise just use it. - */ - bp = cur->bc_bufs[level]; - if (bp && XFS_BUF_ADDR(bp) != d) - bp = NULL; - if (!bp) { - /* - * Need to get a new buffer. Read it, then - * set it in the cursor, releasing the old one. - */ - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - agno, agbno, 0, &bp, XFS_INO_BTREE_REF))) - return error; - xfs_btree_setbuf(cur, level, bp); - /* - * Point to the btree block, now that we have the buffer - */ - block = XFS_BUF_TO_INOBT_BLOCK(bp); - if ((error = xfs_btree_check_sblock(cur, block, level, - bp))) - return error; - } else - block = XFS_BUF_TO_INOBT_BLOCK(bp); - /* - * If we already had a key match at a higher level, we know - * we need to use the first entry in this block. - */ - if (diff == 0) - keyno = 1; - /* - * Otherwise we need to search this block. Do a binary search. - */ - else { - int high; /* high entry number */ - xfs_inobt_key_t *kkbase=NULL;/* base of keys in block */ - xfs_inobt_rec_t *krbase=NULL;/* base of records in block */ - int low; /* low entry number */ - - /* - * Get a pointer to keys or records. - */ - if (level > 0) - kkbase = XFS_INOBT_KEY_ADDR(block, 1, cur); - else - krbase = XFS_INOBT_REC_ADDR(block, 1, cur); - /* - * Set low and high entry numbers, 1-based. - */ - low = 1; - if (!(high = be16_to_cpu(block->bb_numrecs))) { - /* - * If the block is empty, the tree must - * be an empty leaf. - */ - ASSERT(level == 0 && cur->bc_nlevels == 1); - cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE; - *stat = 0; - return 0; - } - /* - * Binary search the block. - */ - while (low <= high) { - xfs_agino_t startino; /* key value */ - - /* - * keyno is average of low and high. - */ - keyno = (low + high) >> 1; - /* - * Get startino. - */ - if (level > 0) { - xfs_inobt_key_t *kkp; - - kkp = kkbase + keyno - 1; - startino = be32_to_cpu(kkp->ir_startino); - } else { - xfs_inobt_rec_t *krp; - - krp = krbase + keyno - 1; - startino = be32_to_cpu(krp->ir_startino); - } - /* - * Compute difference to get next direction. - */ - diff = (__int64_t) - startino - cur->bc_rec.i.ir_startino; - /* - * Less than, move right. - */ - if (diff < 0) - low = keyno + 1; - /* - * Greater than, move left. - */ - else if (diff > 0) - high = keyno - 1; - /* - * Equal, we're done. - */ - else - break; - } - } - /* - * If there are more levels, set up for the next level - * by getting the block number and filling in the cursor. - */ - if (level > 0) { - /* - * If we moved left, need the previous key number, - * unless there isn't one. - */ - if (diff > 0 && --keyno < 1) - keyno = 1; - agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, keyno, cur)); -#ifdef DEBUG - if ((error = xfs_btree_check_sptr(cur, agbno, level))) - return error; -#endif - cur->bc_ptrs[level] = keyno; - } - } - /* - * Done with the search. - * See if we need to adjust the results. - */ - if (dir != XFS_LOOKUP_LE && diff < 0) { - keyno++; - /* - * If ge search and we went off the end of the block, but it's - * not the last block, we're in the wrong block. - */ - if (dir == XFS_LOOKUP_GE && - keyno > be16_to_cpu(block->bb_numrecs) && - be32_to_cpu(block->bb_rightsib) != NULLAGBLOCK) { - int i; - - cur->bc_ptrs[0] = keyno; - if ((error = xfs_btree_increment(cur, 0, &i))) - return error; - ASSERT(i == 1); - *stat = 1; - return 0; - } - } - else if (dir == XFS_LOOKUP_LE && diff > 0) - keyno--; - cur->bc_ptrs[0] = keyno; - /* - * Return if we succeeded or not. - */ - if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs)) - *stat = 0; - else - *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0)); - return 0; -} - /* * Move 1 record left from cur/level if possible. * Update cur to reflect the new path. @@ -1797,59 +1591,6 @@ xfs_inobt_insert( return 0; } -/* - * Lookup the record equal to ino in the btree given by cur. - */ -int /* error */ -xfs_inobt_lookup_eq( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free, /* free inode mask */ - int *stat) /* success/failure */ -{ - cur->bc_rec.i.ir_startino = ino; - cur->bc_rec.i.ir_freecount = fcnt; - cur->bc_rec.i.ir_free = free; - return xfs_inobt_lookup(cur, XFS_LOOKUP_EQ, stat); -} - -/* - * Lookup the first record greater than or equal to ino - * in the btree given by cur. - */ -int /* error */ -xfs_inobt_lookup_ge( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free, /* free inode mask */ - int *stat) /* success/failure */ -{ - cur->bc_rec.i.ir_startino = ino; - cur->bc_rec.i.ir_freecount = fcnt; - cur->bc_rec.i.ir_free = free; - return xfs_inobt_lookup(cur, XFS_LOOKUP_GE, stat); -} - -/* - * Lookup the first record less than or equal to ino - * in the btree given by cur. - */ -int /* error */ -xfs_inobt_lookup_le( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free, /* free inode mask */ - int *stat) /* success/failure */ -{ - cur->bc_rec.i.ir_startino = ino; - cur->bc_rec.i.ir_freecount = fcnt; - cur->bc_rec.i.ir_free = free; - return xfs_inobt_lookup(cur, XFS_LOOKUP_LE, stat); -} - /* * Update the record referred to by cur, to the value given * by [ino, fcnt, free]. @@ -1918,6 +1659,38 @@ xfs_inobt_get_maxrecs( return cur->bc_mp->m_inobt_mxr[level != 0]; } +STATIC void +xfs_inobt_init_key_from_rec( + union xfs_btree_key *key, + union xfs_btree_rec *rec) +{ + key->inobt.ir_startino = rec->inobt.ir_startino; +} + +/* + * intial value of ptr for lookup + */ +STATIC void +xfs_inobt_init_ptr_from_cur( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr) +{ + struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp); + + ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno)); + + ptr->s = agi->agi_root; +} + +STATIC __int64_t +xfs_inobt_key_diff( + struct xfs_btree_cur *cur, + union xfs_btree_key *key) +{ + return (__int64_t)be32_to_cpu(key->inobt.ir_startino) - + cur->bc_rec.i.ir_startino; +} + #ifdef XFS_BTREE_TRACE ktrace_t *xfs_inobt_trace_buf; @@ -1990,6 +1763,9 @@ static const struct xfs_btree_ops xfs_inobt_ops = { .dup_cursor = xfs_inobt_dup_cursor, .get_maxrecs = xfs_inobt_get_maxrecs, + .init_key_from_rec = xfs_inobt_init_key_from_rec, + .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur, + .key_diff = xfs_inobt_key_diff, #ifdef XFS_BTREE_TRACE .trace_enter = xfs_inobt_trace_enter, diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 84554595d28..674b459521f 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -135,26 +135,6 @@ extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino, */ extern int xfs_inobt_insert(struct xfs_btree_cur *cur, int *stat); -/* - * Lookup the record equal to ino in the btree given by cur. - */ -extern int xfs_inobt_lookup_eq(struct xfs_btree_cur *cur, xfs_agino_t ino, - __int32_t fcnt, xfs_inofree_t free, int *stat); - -/* - * Lookup the first record greater than or equal to ino - * in the btree given by cur. - */ -extern int xfs_inobt_lookup_ge(struct xfs_btree_cur *cur, xfs_agino_t ino, - __int32_t fcnt, xfs_inofree_t free, int *stat); - -/* - * Lookup the first record less than or equal to ino - * in the btree given by cur. - */ -extern int xfs_inobt_lookup_le(struct xfs_btree_cur *cur, xfs_agino_t ino, - __int32_t fcnt, xfs_inofree_t free, int *stat); - /* * Update the record referred to by cur, to the value given * by [ino, fcnt, free]. -- cgit v1.2.3-70-g09d2 From 278d0ca14e889c3932a05d1a68675252a12b3466 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:56:32 +1100 Subject: [XFS] implement generic xfs_btree_update From: Dave Chinner The most complicated part here is the lastrec tracking for the alloc btree. Most logic is in the update_lastrec method which has to do some hopefully good enough dirty magic to maintain it. [hch: split out from bigger patch and a rework of the lastrec logic] SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32194a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 17 +++++++ fs/xfs/xfs_alloc_btree.c | 106 +++++++++++++++------------------------- fs/xfs/xfs_alloc_btree.h | 7 --- fs/xfs/xfs_bmap.c | 18 +++++++ fs/xfs/xfs_bmap_btree.c | 45 ----------------- fs/xfs/xfs_bmap_btree.h | 2 - fs/xfs/xfs_btree.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 14 ++++++ fs/xfs/xfs_ialloc.c | 20 ++++++++ fs/xfs/xfs_ialloc_btree.c | 52 -------------------- fs/xfs/xfs_ialloc_btree.h | 8 --- 11 files changed, 228 insertions(+), 182 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 6bda0ae26c2..875e1bae194 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -136,6 +136,23 @@ xfs_alloc_lookup_le( return xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat); } +/* + * Update the record referred to by cur to the value given + * by [bno, len]. + * This either works (return 0) or gets an EFSCORRUPTED error. + */ +STATIC int /* error */ +xfs_alloc_update( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len) /* length of extent */ +{ + union xfs_btree_rec rec; + + rec.alloc.ar_startblock = cpu_to_be32(bno); + rec.alloc.ar_blockcount = cpu_to_be32(len); + return xfs_btree_update(cur, &rec); +} /* * Compute aligned version of the found extent. diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index 28c6a698f56..c5c32999b81 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -1661,83 +1661,50 @@ xfs_alloc_insert( return 0; } +STATIC struct xfs_btree_cur * +xfs_allocbt_dup_cursor( + struct xfs_btree_cur *cur) +{ + return xfs_allocbt_init_cursor(cur->bc_mp, cur->bc_tp, + cur->bc_private.a.agbp, cur->bc_private.a.agno, + cur->bc_btnum); +} + /* - * Update the record referred to by cur, to the value given by [bno, len]. - * This either works (return 0) or gets an EFSCORRUPTED error. + * Update the longest extent in the AGF */ -int /* error */ -xfs_alloc_update( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agblock_t bno, /* starting block of extent */ - xfs_extlen_t len) /* length of extent */ +STATIC void +xfs_allocbt_update_lastrec( + struct xfs_btree_cur *cur, + struct xfs_btree_block *block, + union xfs_btree_rec *rec, + int ptr, + int reason) { - xfs_alloc_block_t *block; /* btree block to update */ - int error; /* error return value */ - int ptr; /* current record number (updating) */ + struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); + xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno); + __be32 len; - ASSERT(len > 0); - /* - * Pick up the a.g. freelist struct and the current block. - */ - block = XFS_BUF_TO_ALLOC_BLOCK(cur->bc_bufs[0]); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, 0, cur->bc_bufs[0]))) - return error; -#endif - /* - * Get the address of the rec to be updated. - */ - ptr = cur->bc_ptrs[0]; - { - xfs_alloc_rec_t *rp; /* pointer to updated record */ + ASSERT(cur->bc_btnum == XFS_BTNUM_CNT); - rp = XFS_ALLOC_REC_ADDR(block, ptr, cur); + switch (reason) { + case LASTREC_UPDATE: /* - * Fill in the new contents and log them. + * If this is the last leaf block and it's the last record, + * then update the size of the longest extent in the AG. */ - rp->ar_startblock = cpu_to_be32(bno); - rp->ar_blockcount = cpu_to_be32(len); - xfs_alloc_log_recs(cur, cur->bc_bufs[0], ptr, ptr); - } - /* - * If it's the by-size btree and it's the last leaf block and - * it's the last record... then update the size of the longest - * extent in the a.g., which we cache in the a.g. freelist header. - */ - if (cur->bc_btnum == XFS_BTNUM_CNT && - be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK && - ptr == be16_to_cpu(block->bb_numrecs)) { - xfs_agf_t *agf; /* a.g. freespace header */ - xfs_agnumber_t seqno; - - agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); - seqno = be32_to_cpu(agf->agf_seqno); - cur->bc_mp->m_perag[seqno].pagf_longest = len; - agf->agf_longest = cpu_to_be32(len); - xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, - XFS_AGF_LONGEST); - } - /* - * Updating first record in leaf. Pass new key value up to our parent. - */ - if (ptr == 1) { - xfs_alloc_key_t key; /* key containing [bno, len] */ - - key.ar_startblock = cpu_to_be32(bno); - key.ar_blockcount = cpu_to_be32(len); - if ((error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, 1))) - return error; + if (ptr != xfs_btree_get_numrecs(block)) + return; + len = rec->alloc.ar_blockcount; + break; + default: + ASSERT(0); + return; } - return 0; -} -STATIC struct xfs_btree_cur * -xfs_allocbt_dup_cursor( - struct xfs_btree_cur *cur) -{ - return xfs_allocbt_init_cursor(cur->bc_mp, cur->bc_tp, - cur->bc_private.a.agbp, cur->bc_private.a.agno, - cur->bc_btnum); + agf->agf_longest = len; + cur->bc_mp->m_perag[seqno].pagf_longest = be32_to_cpu(len); + xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, XFS_AGF_LONGEST); } STATIC int @@ -1864,6 +1831,7 @@ static const struct xfs_btree_ops xfs_allocbt_ops = { .key_len = sizeof(xfs_alloc_key_t), .dup_cursor = xfs_allocbt_dup_cursor, + .update_lastrec = xfs_allocbt_update_lastrec, .get_maxrecs = xfs_allocbt_get_maxrecs, .init_key_from_rec = xfs_allocbt_init_key_from_rec, .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur, @@ -1902,6 +1870,8 @@ xfs_allocbt_init_cursor( cur->bc_blocklog = mp->m_sb.sb_blocklog; cur->bc_ops = &xfs_allocbt_ops; + if (btnum == XFS_BTNUM_CNT) + cur->bc_flags = XFS_BTREE_LASTREC_UPDATE; cur->bc_private.a.agbp = agbp; cur->bc_private.a.agno = agno; diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index aa110ff4feb..81e2f360781 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -113,13 +113,6 @@ extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno, */ extern int xfs_alloc_insert(struct xfs_btree_cur *cur, int *stat); -/* - * Update the record referred to by cur, to the value given by [bno, len]. - * This either works (return 0) or gets an EFSCORRUPTED error. - */ -extern int xfs_alloc_update(struct xfs_btree_cur *cur, xfs_agblock_t bno, - xfs_extlen_t len); - extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 1296b4102e9..7d6c4ace805 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -430,6 +430,24 @@ xfs_bmbt_lookup_ge( return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); } +/* +* Update the record referred to by cur to the value given + * by [off, bno, len, state]. + * This either works (return 0) or gets an EFSCORRUPTED error. + */ +STATIC int +xfs_bmbt_update( + struct xfs_btree_cur *cur, + xfs_fileoff_t off, + xfs_fsblock_t bno, + xfs_filblks_t len, + xfs_exntst_t state) +{ + union xfs_btree_rec rec; + + xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); + return xfs_btree_update(cur, &rec); +} /* * Called from xfs_bmap_add_attrfork to handle btree format files. diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 0a56257b7fd..99200a9898f 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -1963,51 +1963,6 @@ xfs_bmbt_to_bmdr( memcpy(tpp, fpp, sizeof(*fpp) * dmxr); } -/* - * Update the record to the passed values. - */ -int -xfs_bmbt_update( - xfs_btree_cur_t *cur, - xfs_fileoff_t off, - xfs_fsblock_t bno, - xfs_filblks_t len, - xfs_exntst_t state) -{ - xfs_bmbt_block_t *block; - xfs_buf_t *bp; - int error; - xfs_bmbt_key_t key; - int ptr; - xfs_bmbt_rec_t *rp; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGFFFI(cur, (xfs_dfiloff_t)off, (xfs_dfsbno_t)bno, - (xfs_dfilblks_t)len, (int)state); - block = xfs_bmbt_get_block(cur, 0, &bp); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, block, 0, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } -#endif - ptr = cur->bc_ptrs[0]; - rp = XFS_BMAP_REC_IADDR(block, ptr, cur); - xfs_bmbt_disk_set_allf(rp, off, bno, len, state); - xfs_bmbt_log_recs(cur, bp, ptr, ptr); - if (ptr > 1) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - return 0; - } - key.br_startoff = cpu_to_be64(off); - if ((error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, 1))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - return 0; -} - /* * Check extent records, which have just been read, for * any bit in the extent flag field. ASSERT on debug diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index d04198cdc4b..6bfd62ec54f 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -274,8 +274,6 @@ extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o, xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); extern void xfs_bmbt_to_bmdr(xfs_bmbt_block_t *, int, xfs_bmdr_block_t *, int); -extern int xfs_bmbt_update(struct xfs_btree_cur *, xfs_fileoff_t, - xfs_fsblock_t, xfs_filblks_t, xfs_exntst_t); extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_inode *, int); diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 1459a2b9a72..205272f282d 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -988,6 +988,30 @@ xfs_btree_get_sibling( } } +/* + * Return true if ptr is the last record in the btree and + * we need to track updateѕ to this record. The decision + * will be further refined in the update_lastrec method. + */ +STATIC int +xfs_btree_is_lastrec( + struct xfs_btree_cur *cur, + struct xfs_btree_block *block, + int level) +{ + union xfs_btree_ptr ptr; + + if (level > 0) + return 0; + if (!(cur->bc_flags & XFS_BTREE_LASTREC_UPDATE)) + return 0; + + xfs_btree_get_sibling(cur, block, &ptr, XFS_BB_RIGHTSIB); + if (!xfs_btree_ptr_is_null(cur, &ptr)) + return 0; + return 1; +} + STATIC xfs_daddr_t xfs_btree_ptr_to_daddr( struct xfs_btree_cur *cur, @@ -1079,6 +1103,20 @@ xfs_btree_copy_keys( memcpy(dst_key, src_key, numkeys * cur->bc_ops->key_len); } +/* + * Copy records from one btree block to another. + */ +STATIC void +xfs_btree_copy_recs( + struct xfs_btree_cur *cur, + union xfs_btree_rec *dst_rec, + union xfs_btree_rec *src_rec, + int numrecs) +{ + ASSERT(numrecs >= 0); + memcpy(dst_rec, src_rec, numrecs * cur->bc_ops->rec_len); +} + /* * Log key values from the btree block. */ @@ -1104,6 +1142,26 @@ xfs_btree_log_keys( XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); } +/* + * Log record values from the btree block. + */ +STATIC void +xfs_btree_log_recs( + struct xfs_btree_cur *cur, + struct xfs_buf *bp, + int first, + int last) +{ + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGBII(cur, bp, first, last); + + xfs_trans_log_buf(cur->bc_tp, bp, + xfs_btree_rec_offset(cur, first), + xfs_btree_rec_offset(cur, last + 1) - 1); + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); +} + /* * Increment cursor by one record at the level. * For nonzero levels the leaf-ward information is untouched. @@ -1576,3 +1634,66 @@ xfs_btree_updkey( XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); return 0; } + +/* + * Update the record referred to by cur to the value in the + * given record. This either works (return 0) or gets an + * EFSCORRUPTED error. + */ +int +xfs_btree_update( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec) +{ + struct xfs_btree_block *block; + struct xfs_buf *bp; + int error; + int ptr; + union xfs_btree_rec *rp; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGR(cur, rec); + + /* Pick up the current block. */ + block = xfs_btree_get_block(cur, 0, &bp); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, 0, bp); + if (error) + goto error0; +#endif + /* Get the address of the rec to be updated. */ + ptr = cur->bc_ptrs[0]; + rp = xfs_btree_rec_addr(cur, ptr, block); + + /* Fill in the new contents and log them. */ + xfs_btree_copy_recs(cur, rp, rec, 1); + xfs_btree_log_recs(cur, bp, ptr, ptr); + + /* + * If we are tracking the last record in the tree and + * we are at the far right edge of the tree, update it. + */ + if (xfs_btree_is_lastrec(cur, block, 0)) { + cur->bc_ops->update_lastrec(cur, block, rec, + ptr, LASTREC_UPDATE); + } + + /* Updating first rec in leaf. Pass new key value up to our parent. */ + if (ptr == 1) { + union xfs_btree_key key; + + cur->bc_ops->init_key_from_rec(&key, rec); + error = xfs_btree_updkey(cur, &key, 1); + if (error) + goto error0; + } + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + return 0; + +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} + diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index ac3f527b0ac..c3bfa5556c1 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -187,6 +187,12 @@ struct xfs_btree_ops { /* cursor operations */ struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *); + /* update last record information */ + void (*update_lastrec)(struct xfs_btree_cur *cur, + struct xfs_btree_block *block, + union xfs_btree_rec *rec, + int ptr, int reason); + /* records in block/level */ int (*get_maxrecs)(struct xfs_btree_cur *cur, int level); @@ -220,6 +226,12 @@ struct xfs_btree_ops { #endif }; +/* + * Reasons for the update_lastrec method to be called. + */ +#define LASTREC_UPDATE 0 + + /* * Btree cursor structure. * This collects all information needed by the btree code in one place. @@ -264,6 +276,7 @@ typedef struct xfs_btree_cur /* cursor flags */ #define XFS_BTREE_LONG_PTRS (1<<0) /* pointers are 64bits long */ #define XFS_BTREE_ROOT_IN_INODE (1<<1) /* root may be variable size */ +#define XFS_BTREE_LASTREC_UPDATE (1<<2) /* track last rec externally */ #define XFS_BTREE_NOERROR 0 @@ -519,6 +532,7 @@ int xfs_btree_increment(struct xfs_btree_cur *, int, int *); int xfs_btree_decrement(struct xfs_btree_cur *, int, int *); int xfs_btree_lookup(struct xfs_btree_cur *, xfs_lookup_t, int *); int xfs_btree_updkey(struct xfs_btree_cur *, union xfs_btree_key *, int); +int xfs_btree_update(struct xfs_btree_cur *, union xfs_btree_rec *); /* * Helpers. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index bbf537f64c4..138651afd44 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -171,6 +171,26 @@ xfs_inobt_lookup_le( return xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat); } +/* + * Update the record referred to by cur to the value given + * by [ino, fcnt, free]. + * This either works (return 0) or gets an EFSCORRUPTED error. + */ +STATIC int /* error */ +xfs_inobt_update( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agino_t ino, /* starting inode of chunk */ + __int32_t fcnt, /* free inode count */ + xfs_inofree_t free) /* free inode mask */ +{ + union xfs_btree_rec rec; + + rec.inobt.ir_startino = cpu_to_be32(ino); + rec.inobt.ir_freecount = cpu_to_be32(fcnt); + rec.inobt.ir_free = cpu_to_be64(free); + return xfs_btree_update(cur, &rec); +} + /* * Allocate new inodes in the allocation group specified by agbp. * Return 0 for success, else error code. diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index cd8bb519cb5..d080a6833a8 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -1551,58 +1551,6 @@ xfs_inobt_insert( return 0; } -/* - * Update the record referred to by cur, to the value given - * by [ino, fcnt, free]. - * This either works (return 0) or gets an EFSCORRUPTED error. - */ -int /* error */ -xfs_inobt_update( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free) /* free inode mask */ -{ - xfs_inobt_block_t *block; /* btree block to update */ - xfs_buf_t *bp; /* buffer containing btree block */ - int error; /* error return value */ - int ptr; /* current record number (updating) */ - xfs_inobt_rec_t *rp; /* pointer to updated record */ - - /* - * Pick up the current block. - */ - bp = cur->bc_bufs[0]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, 0, bp))) - return error; -#endif - /* - * Get the address of the rec to be updated. - */ - ptr = cur->bc_ptrs[0]; - rp = XFS_INOBT_REC_ADDR(block, ptr, cur); - /* - * Fill in the new contents and log them. - */ - rp->ir_startino = cpu_to_be32(ino); - rp->ir_freecount = cpu_to_be32(fcnt); - rp->ir_free = cpu_to_be64(free); - xfs_inobt_log_recs(cur, bp, ptr, ptr); - /* - * Updating first record in leaf. Pass new key value up to our parent. - */ - if (ptr == 1) { - xfs_inobt_key_t key; /* key containing [ino] */ - - key.ir_startino = cpu_to_be32(ino); - if ((error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, 1))) - return error; - } - return 0; -} - STATIC struct xfs_btree_cur * xfs_inobt_dup_cursor( struct xfs_btree_cur *cur) diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 674b459521f..7f77549e82a 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -135,14 +135,6 @@ extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino, */ extern int xfs_inobt_insert(struct xfs_btree_cur *cur, int *stat); -/* - * Update the record referred to by cur, to the value given - * by [ino, fcnt, free]. - * This either works (return 0) or gets an EFSCORRUPTED error. - */ -extern int xfs_inobt_update(struct xfs_btree_cur *cur, xfs_agino_t ino, - __int32_t fcnt, xfs_inofree_t free); - extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t); -- cgit v1.2.3-70-g09d2 From 4b22a57188d87e873346b73c227607715be96399 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:57:40 +1100 Subject: [XFS] implement generic xfs_btree_insert/insrec Make the btree insert code generic. Based on a patch from David Chinner with lots of changes to follow the original btree implementations more closely. While this loses some of the generic helper routines for inserting/moving/removing records it also solves some of the one off bugs in the original code and makes it easier to verify. SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32202a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 10 +- fs/xfs/xfs_alloc_btree.c | 339 ++++--------------------------------------- fs/xfs/xfs_alloc_btree.h | 6 - fs/xfs/xfs_bmap.c | 20 +-- fs/xfs/xfs_bmap_btree.c | 308 +++++++-------------------------------- fs/xfs/xfs_bmap_btree.h | 1 - fs/xfs/xfs_btree.c | 362 ++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 11 ++ fs/xfs/xfs_ialloc.c | 2 +- fs/xfs/xfs_ialloc_btree.c | 302 +++----------------------------------- fs/xfs/xfs_ialloc_btree.h | 6 - 11 files changed, 494 insertions(+), 873 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 875e1bae194..a983824c12b 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -408,7 +408,7 @@ xfs_alloc_fixup_trees( if ((error = xfs_alloc_lookup_eq(cnt_cur, nfbno1, nflen1, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 0); - if ((error = xfs_alloc_insert(cnt_cur, &i))) + if ((error = xfs_btree_insert(cnt_cur, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 1); } @@ -416,7 +416,7 @@ xfs_alloc_fixup_trees( if ((error = xfs_alloc_lookup_eq(cnt_cur, nfbno2, nflen2, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 0); - if ((error = xfs_alloc_insert(cnt_cur, &i))) + if ((error = xfs_btree_insert(cnt_cur, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 1); } @@ -444,7 +444,7 @@ xfs_alloc_fixup_trees( if ((error = xfs_alloc_lookup_eq(bno_cur, nfbno2, nflen2, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 0); - if ((error = xfs_alloc_insert(bno_cur, &i))) + if ((error = xfs_btree_insert(bno_cur, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 1); } @@ -1756,7 +1756,7 @@ xfs_free_ag_extent( else { nbno = bno; nlen = len; - if ((error = xfs_alloc_insert(bno_cur, &i))) + if ((error = xfs_btree_insert(bno_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); } @@ -1768,7 +1768,7 @@ xfs_free_ag_extent( if ((error = xfs_alloc_lookup_eq(cnt_cur, nbno, nlen, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 0, error0); - if ((error = xfs_alloc_insert(cnt_cur, &i))) + if ((error = xfs_btree_insert(cnt_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); xfs_btree_del_cursor(cnt_cur, XFS_BTREE_NOERROR); diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index f21a3e9cc3d..818adca77fc 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -582,256 +582,6 @@ error0: return error; } -/* - * Insert one record/level. Return information to the caller - * allowing the next level up to proceed if necessary. - */ -STATIC int /* error */ -xfs_alloc_insrec( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level to insert record at */ - xfs_agblock_t *bnop, /* i/o: block number inserted */ - xfs_alloc_rec_t *recp, /* i/o: record data inserted */ - xfs_btree_cur_t **curp, /* output: new cursor replacing cur */ - int *stat) /* output: success/failure */ -{ - xfs_agf_t *agf; /* allocation group freelist header */ - xfs_alloc_block_t *block; /* btree block record/key lives in */ - xfs_buf_t *bp; /* buffer for block */ - int error; /* error return value */ - int i; /* loop index */ - xfs_alloc_key_t key; /* key value being inserted */ - xfs_alloc_key_t *kp; /* pointer to btree keys */ - xfs_agblock_t nbno; /* block number of allocated block */ - xfs_btree_cur_t *ncur; /* new cursor to be used at next lvl */ - xfs_alloc_key_t nkey; /* new key value, from split */ - xfs_alloc_rec_t nrec; /* new record value, for caller */ - int numrecs; - int optr; /* old ptr value */ - xfs_alloc_ptr_t *pp; /* pointer to btree addresses */ - int ptr; /* index in btree block for this rec */ - xfs_alloc_rec_t *rp; /* pointer to btree records */ - - ASSERT(be32_to_cpu(recp->ar_blockcount) > 0); - - /* - * GCC doesn't understand the (arguably complex) control flow in - * this function and complains about uninitialized structure fields - * without this. - */ - memset(&nrec, 0, sizeof(nrec)); - - /* - * If we made it to the root level, allocate a new root block - * and we're done. - */ - if (level >= cur->bc_nlevels) { - XFS_STATS_INC(xs_abt_insrec); - if ((error = xfs_btree_new_root(cur, &i))) - return error; - *bnop = NULLAGBLOCK; - *stat = i; - return 0; - } - /* - * Make a key out of the record data to be inserted, and save it. - */ - key.ar_startblock = recp->ar_startblock; - key.ar_blockcount = recp->ar_blockcount; - optr = ptr = cur->bc_ptrs[level]; - /* - * If we're off the left edge, return failure. - */ - if (ptr == 0) { - *stat = 0; - return 0; - } - XFS_STATS_INC(xs_abt_insrec); - /* - * Get pointers to the btree buffer and block. - */ - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - numrecs = be16_to_cpu(block->bb_numrecs); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, bp))) - return error; - /* - * Check that the new entry is being inserted in the right place. - */ - if (ptr <= numrecs) { - if (level == 0) { - rp = XFS_ALLOC_REC_ADDR(block, ptr, cur); - xfs_btree_check_rec(cur->bc_btnum, recp, rp); - } else { - kp = XFS_ALLOC_KEY_ADDR(block, ptr, cur); - xfs_btree_check_key(cur->bc_btnum, &key, kp); - } - } -#endif - nbno = NULLAGBLOCK; - ncur = NULL; - /* - * If the block is full, we can't insert the new entry until we - * make the block un-full. - */ - if (numrecs == XFS_ALLOC_BLOCK_MAXRECS(level, cur)) { - /* - * First, try shifting an entry to the right neighbor. - */ - if ((error = xfs_btree_rshift(cur, level, &i))) - return error; - if (i) { - /* nothing */ - } - /* - * Next, try shifting an entry to the left neighbor. - */ - else { - if ((error = xfs_btree_lshift(cur, level, &i))) - return error; - if (i) - optr = ptr = cur->bc_ptrs[level]; - else { - union xfs_btree_ptr bno = { .s = cpu_to_be32(nbno) }; - /* - * Next, try splitting the current block in - * half. If this works we have to re-set our - * variables because we could be in a - * different block now. - */ - if ((error = xfs_btree_split(cur, level, &bno, - (union xfs_btree_key *)&nkey, - &ncur, &i))) - return error; - nbno = be32_to_cpu(bno.s); - if (i) { - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_ALLOC_BLOCK(bp); -#ifdef DEBUG - if ((error = - xfs_btree_check_sblock(cur, - block, level, bp))) - return error; -#endif - ptr = cur->bc_ptrs[level]; - nrec.ar_startblock = nkey.ar_startblock; - nrec.ar_blockcount = nkey.ar_blockcount; - } - /* - * Otherwise the insert fails. - */ - else { - *stat = 0; - return 0; - } - } - } - } - /* - * At this point we know there's room for our new entry in the block - * we're pointing at. - */ - numrecs = be16_to_cpu(block->bb_numrecs); - if (level > 0) { - /* - * It's a non-leaf entry. Make a hole for the new data - * in the key and ptr regions of the block. - */ - kp = XFS_ALLOC_KEY_ADDR(block, 1, cur); - pp = XFS_ALLOC_PTR_ADDR(block, 1, cur); -#ifdef DEBUG - for (i = numrecs; i >= ptr; i--) { - if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(pp[i - 1]), level))) - return error; - } -#endif - memmove(&kp[ptr], &kp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*kp)); - memmove(&pp[ptr], &pp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*pp)); -#ifdef DEBUG - if ((error = xfs_btree_check_sptr(cur, *bnop, level))) - return error; -#endif - /* - * Now stuff the new data in, bump numrecs and log the new data. - */ - kp[ptr - 1] = key; - pp[ptr - 1] = cpu_to_be32(*bnop); - numrecs++; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_alloc_log_keys(cur, bp, ptr, numrecs); - xfs_alloc_log_ptrs(cur, bp, ptr, numrecs); -#ifdef DEBUG - if (ptr < numrecs) - xfs_btree_check_key(cur->bc_btnum, kp + ptr - 1, - kp + ptr); -#endif - } else { - /* - * It's a leaf entry. Make a hole for the new record. - */ - rp = XFS_ALLOC_REC_ADDR(block, 1, cur); - memmove(&rp[ptr], &rp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*rp)); - /* - * Now stuff the new record in, bump numrecs - * and log the new data. - */ - rp[ptr - 1] = *recp; - numrecs++; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_alloc_log_recs(cur, bp, ptr, numrecs); -#ifdef DEBUG - if (ptr < numrecs) - xfs_btree_check_rec(cur->bc_btnum, rp + ptr - 1, - rp + ptr); -#endif - } - /* - * Log the new number of records in the btree header. - */ - xfs_alloc_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS); - /* - * If we inserted at the start of a block, update the parents' keys. - */ - if (optr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, level + 1))) - return error; - /* - * Look to see if the longest extent in the allocation group - * needs to be updated. - */ - - agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); - if (level == 0 && - cur->bc_btnum == XFS_BTNUM_CNT && - be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK && - be32_to_cpu(recp->ar_blockcount) > be32_to_cpu(agf->agf_longest)) { - /* - * If this is a leaf in the by-size btree and there - * is no right sibling block and this block is bigger - * than the previous longest block, update it. - */ - agf->agf_longest = recp->ar_blockcount; - cur->bc_mp->m_perag[be32_to_cpu(agf->agf_seqno)].pagf_longest - = be32_to_cpu(recp->ar_blockcount); - xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, - XFS_AGF_LONGEST); - } - /* - * Return the new block number, if any. - * If there is one, give back a record value and a cursor too. - */ - *bnop = nbno; - if (nbno != NULLAGBLOCK) { - *recp = nrec; - *curp = ncur; - } - *stat = 1; - return 0; -} - /* * Log header fields from a btree block. */ @@ -1019,65 +769,6 @@ xfs_alloc_get_rec( return 0; } -/* - * Insert the current record at the point referenced by cur. - * The cursor may be inconsistent on return if splits have been done. - */ -int /* error */ -xfs_alloc_insert( - xfs_btree_cur_t *cur, /* btree cursor */ - int *stat) /* success/failure */ -{ - int error; /* error return value */ - int i; /* result value, 0 for failure */ - int level; /* current level number in btree */ - xfs_agblock_t nbno; /* new block number (split result) */ - xfs_btree_cur_t *ncur; /* new cursor (split result) */ - xfs_alloc_rec_t nrec; /* record being inserted this level */ - xfs_btree_cur_t *pcur; /* previous level's cursor */ - - level = 0; - nbno = NULLAGBLOCK; - nrec.ar_startblock = cpu_to_be32(cur->bc_rec.a.ar_startblock); - nrec.ar_blockcount = cpu_to_be32(cur->bc_rec.a.ar_blockcount); - ncur = NULL; - pcur = cur; - /* - * Loop going up the tree, starting at the leaf level. - * Stop when we don't get a split block, that must mean that - * the insert is finished with this level. - */ - do { - /* - * Insert nrec/nbno into this level of the tree. - * Note if we fail, nbno will be null. - */ - if ((error = xfs_alloc_insrec(pcur, level++, &nbno, &nrec, &ncur, - &i))) { - if (pcur != cur) - xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR); - return error; - } - /* - * See if the cursor we just used is trash. - * Can't trash the caller's cursor, but otherwise we should - * if ncur is a new cursor or we're about to be done. - */ - if (pcur != cur && (ncur || nbno == NULLAGBLOCK)) { - cur->bc_nlevels = pcur->bc_nlevels; - xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR); - } - /* - * If we got a new cursor, switch to it. - */ - if (ncur) { - pcur = ncur; - ncur = NULL; - } - } while (nbno != NULLAGBLOCK); - *stat = i; - return 0; -} STATIC struct xfs_btree_cur * xfs_allocbt_dup_cursor( @@ -1170,6 +861,12 @@ xfs_allocbt_update_lastrec( return; len = rec->alloc.ar_blockcount; break; + case LASTREC_INSREC: + if (be32_to_cpu(rec->alloc.ar_blockcount) <= + be32_to_cpu(agf->agf_longest)) + return; + len = rec->alloc.ar_blockcount; + break; default: ASSERT(0); return; @@ -1199,6 +896,28 @@ xfs_allocbt_init_key_from_rec( key->alloc.ar_blockcount = rec->alloc.ar_blockcount; } +STATIC void +xfs_allocbt_init_rec_from_key( + union xfs_btree_key *key, + union xfs_btree_rec *rec) +{ + ASSERT(key->alloc.ar_startblock != 0); + + rec->alloc.ar_startblock = key->alloc.ar_startblock; + rec->alloc.ar_blockcount = key->alloc.ar_blockcount; +} + +STATIC void +xfs_allocbt_init_rec_from_cur( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec) +{ + ASSERT(cur->bc_rec.a.ar_startblock != 0); + + rec->alloc.ar_startblock = cpu_to_be32(cur->bc_rec.a.ar_startblock); + rec->alloc.ar_blockcount = cpu_to_be32(cur->bc_rec.a.ar_blockcount); +} + STATIC void xfs_allocbt_init_ptr_from_cur( struct xfs_btree_cur *cur, @@ -1309,6 +1028,8 @@ static const struct xfs_btree_ops xfs_allocbt_ops = { .update_lastrec = xfs_allocbt_update_lastrec, .get_maxrecs = xfs_allocbt_get_maxrecs, .init_key_from_rec = xfs_allocbt_init_key_from_rec, + .init_rec_from_key = xfs_allocbt_init_rec_from_key, + .init_rec_from_cur = xfs_allocbt_init_rec_from_cur, .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur, .key_diff = xfs_allocbt_key_diff, diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 81e2f360781..2e340ef8025 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -107,12 +107,6 @@ extern int xfs_alloc_delete(struct xfs_btree_cur *cur, int *stat); extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno, xfs_extlen_t *len, int *stat); -/* - * Insert the current record at the point referenced by cur. - * The cursor may be inconsistent on return if splits have been done. - */ -extern int xfs_alloc_insert(struct xfs_btree_cur *cur, int *stat); - extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 315bc291268..85e2e8b9cf4 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -977,7 +977,7 @@ xfs_bmap_add_extent_delay_real( goto done; XFS_WANT_CORRUPTED_GOTO(i == 0, done); cur->bc_rec.b.br_state = XFS_EXT_NORM; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -1053,7 +1053,7 @@ xfs_bmap_add_extent_delay_real( goto done; XFS_WANT_CORRUPTED_GOTO(i == 0, done); cur->bc_rec.b.br_state = XFS_EXT_NORM; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -1143,7 +1143,7 @@ xfs_bmap_add_extent_delay_real( goto done; XFS_WANT_CORRUPTED_GOTO(i == 0, done); cur->bc_rec.b.br_state = XFS_EXT_NORM; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -1198,7 +1198,7 @@ xfs_bmap_add_extent_delay_real( goto done; XFS_WANT_CORRUPTED_GOTO(i == 0, done); cur->bc_rec.b.br_state = XFS_EXT_NORM; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -1651,7 +1651,7 @@ xfs_bmap_add_extent_unwritten_real( oldext))) goto done; cur->bc_rec.b = *new; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -1741,7 +1741,7 @@ xfs_bmap_add_extent_unwritten_real( goto done; XFS_WANT_CORRUPTED_GOTO(i == 0, done); cur->bc_rec.b.br_state = XFS_EXT_NORM; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -1789,7 +1789,7 @@ xfs_bmap_add_extent_unwritten_real( cur->bc_rec.b = PREV; cur->bc_rec.b.br_blockcount = new->br_startoff - PREV.br_startoff; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); /* @@ -1804,7 +1804,7 @@ xfs_bmap_add_extent_unwritten_real( XFS_WANT_CORRUPTED_GOTO(i == 0, done); /* new middle extent - newext */ cur->bc_rec.b.br_state = new->br_state; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -2264,7 +2264,7 @@ xfs_bmap_add_extent_hole_real( goto done; XFS_WANT_CORRUPTED_GOTO(i == 0, done); cur->bc_rec.b.br_state = new->br_state; - if ((error = xfs_bmbt_insert(cur, &i))) + if ((error = xfs_btree_insert(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); } @@ -3303,7 +3303,7 @@ xfs_bmap_del_extent( if ((error = xfs_btree_increment(cur, 0, &i))) goto done; cur->bc_rec.b = new; - error = xfs_bmbt_insert(cur, &i); + error = xfs_btree_insert(cur, &i); if (error && error != ENOSPC) goto done; /* diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 204f276aeaa..2b15df32b7d 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -456,198 +456,6 @@ error0: return error; } -/* - * Insert one record/level. Return information to the caller - * allowing the next level up to proceed if necessary. - */ -STATIC int /* error */ -xfs_bmbt_insrec( - xfs_btree_cur_t *cur, - int level, - xfs_fsblock_t *bnop, - xfs_bmbt_rec_t *recp, - xfs_btree_cur_t **curp, - int *stat) /* no-go/done/continue */ -{ - xfs_bmbt_block_t *block; /* bmap btree block */ - xfs_buf_t *bp; /* buffer for block */ - int error; /* error return value */ - int i; /* loop index */ - xfs_bmbt_key_t key; /* bmap btree key */ - xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */ - int logflags; /* inode logging flags */ - xfs_fsblock_t nbno; /* new block number */ - struct xfs_btree_cur *ncur; /* new btree cursor */ - __uint64_t startoff; /* new btree key value */ - xfs_bmbt_rec_t nrec; /* new record count */ - int optr; /* old key/record index */ - xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */ - int ptr; /* key/record index */ - xfs_bmbt_rec_t *rp=NULL; /* pointer to bmap btree rec */ - int numrecs; - - ASSERT(level < cur->bc_nlevels); - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGIFR(cur, level, *bnop, recp); - ncur = NULL; - key.br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(recp)); - optr = ptr = cur->bc_ptrs[level]; - if (ptr == 0) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - XFS_STATS_INC(xs_bmbt_insrec); - block = xfs_bmbt_get_block(cur, level, &bp); - numrecs = be16_to_cpu(block->bb_numrecs); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, block, level, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - if (ptr <= numrecs) { - if (level == 0) { - rp = XFS_BMAP_REC_IADDR(block, ptr, cur); - xfs_btree_check_rec(XFS_BTNUM_BMAP, recp, rp); - } else { - kp = XFS_BMAP_KEY_IADDR(block, ptr, cur); - xfs_btree_check_key(XFS_BTNUM_BMAP, &key, kp); - } - } -#endif - nbno = NULLFSBLOCK; - if (numrecs == XFS_BMAP_BLOCK_IMAXRECS(level, cur)) { - if (numrecs < XFS_BMAP_BLOCK_DMAXRECS(level, cur)) { - /* - * A root block, that can be made bigger. - */ - xfs_iroot_realloc(cur->bc_private.b.ip, 1, - cur->bc_private.b.whichfork); - block = xfs_bmbt_get_block(cur, level, &bp); - } else if (level == cur->bc_nlevels - 1) { - if ((error = xfs_btree_new_iroot(cur, &logflags, stat)) || - *stat == 0) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, - logflags); - block = xfs_bmbt_get_block(cur, level, &bp); - } else { - if ((error = xfs_btree_rshift(cur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - if (i) { - /* nothing */ - } else { - if ((error = xfs_btree_lshift(cur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - if (i) { - optr = ptr = cur->bc_ptrs[level]; - } else { - union xfs_btree_ptr bno = { .l = cpu_to_be64(nbno) }; - union xfs_btree_key skey; - if ((error = xfs_btree_split(cur, level, - &bno, &skey, &ncur, - &i))) { - XFS_BMBT_TRACE_CURSOR(cur, - ERROR); - return error; - } - nbno = be64_to_cpu(bno.l); - startoff = be64_to_cpu(skey.bmbt.br_startoff); - if (i) { - block = xfs_bmbt_get_block( - cur, level, &bp); -#ifdef DEBUG - if ((error = - xfs_btree_check_lblock(cur, - block, level, bp))) { - XFS_BMBT_TRACE_CURSOR( - cur, ERROR); - return error; - } -#endif - ptr = cur->bc_ptrs[level]; - xfs_bmbt_disk_set_allf(&nrec, - startoff, 0, 0, - XFS_EXT_NORM); - } else { - XFS_BMBT_TRACE_CURSOR(cur, - EXIT); - *stat = 0; - return 0; - } - } - } - } - } - numrecs = be16_to_cpu(block->bb_numrecs); - if (level > 0) { - kp = XFS_BMAP_KEY_IADDR(block, 1, cur); - pp = XFS_BMAP_PTR_IADDR(block, 1, cur); -#ifdef DEBUG - for (i = numrecs; i >= ptr; i--) { - if ((error = xfs_btree_check_lptr_disk(cur, pp[i - 1], - level))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - } -#endif - memmove(&kp[ptr], &kp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*kp)); - memmove(&pp[ptr], &pp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*pp)); -#ifdef DEBUG - if ((error = xfs_btree_check_lptr(cur, *bnop, level))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } -#endif - kp[ptr - 1] = key; - pp[ptr - 1] = cpu_to_be64(*bnop); - numrecs++; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_bmbt_log_keys(cur, bp, ptr, numrecs); - xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs); - } else { - rp = XFS_BMAP_REC_IADDR(block, 1, cur); - memmove(&rp[ptr], &rp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*rp)); - rp[ptr - 1] = *recp; - numrecs++; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_bmbt_log_recs(cur, bp, ptr, numrecs); - } - xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS); -#ifdef DEBUG - if (ptr < numrecs) { - if (level == 0) - xfs_btree_check_rec(XFS_BTNUM_BMAP, rp + ptr - 1, - rp + ptr); - else - xfs_btree_check_key(XFS_BTNUM_BMAP, kp + ptr - 1, - kp + ptr); - } -#endif - if (optr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, level + 1))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - *bnop = nbno; - if (nbno != NULLFSBLOCK) { - *recp = nrec; - *curp = ncur; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; -} - STATIC int xfs_bmbt_killroot( xfs_btree_cur_t *cur) @@ -1059,67 +867,6 @@ xfs_bmbt_disk_get_startoff( XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; } -/* - * Insert the current record at the point referenced by cur. - * - * A multi-level split of the tree on insert will invalidate the original - * cursor. All callers of this function should assume that the cursor is - * no longer valid and revalidate it. - */ -int /* error */ -xfs_bmbt_insert( - xfs_btree_cur_t *cur, - int *stat) /* success/failure */ -{ - int error; /* error return value */ - int i; - int level; - xfs_fsblock_t nbno; - xfs_btree_cur_t *ncur; - xfs_bmbt_rec_t nrec; - xfs_btree_cur_t *pcur; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - level = 0; - nbno = NULLFSBLOCK; - xfs_bmbt_disk_set_all(&nrec, &cur->bc_rec.b); - ncur = NULL; - pcur = cur; - do { - if ((error = xfs_bmbt_insrec(pcur, level++, &nbno, &nrec, &ncur, - &i))) { - if (pcur != cur) - xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR); - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if (pcur != cur && (ncur || nbno == NULLFSBLOCK)) { - cur->bc_nlevels = pcur->bc_nlevels; - cur->bc_private.b.allocated += - pcur->bc_private.b.allocated; - pcur->bc_private.b.allocated = 0; - ASSERT((cur->bc_private.b.firstblock != NULLFSBLOCK) || - XFS_IS_REALTIME_INODE(cur->bc_private.b.ip)); - cur->bc_private.b.firstblock = - pcur->bc_private.b.firstblock; - ASSERT(cur->bc_private.b.flist == - pcur->bc_private.b.flist); - xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR); - } - if (ncur) { - pcur = ncur; - ncur = NULL; - } - } while (nbno != NULLFSBLOCK); - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = i; - return 0; -error0: - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; -} - /* * Log fields from the btree block header. */ @@ -1450,6 +1197,21 @@ xfs_bmbt_dup_cursor( return new; } +STATIC void +xfs_bmbt_update_cursor( + struct xfs_btree_cur *src, + struct xfs_btree_cur *dst) +{ + ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || + (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); + ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); + + dst->bc_private.b.allocated += src->bc_private.b.allocated; + dst->bc_private.b.firstblock = src->bc_private.b.firstblock; + + src->bc_private.b.allocated = 0; +} + STATIC int xfs_bmbt_alloc_block( struct xfs_btree_cur *cur, @@ -1544,6 +1306,23 @@ xfs_bmbt_get_maxrecs( return XFS_BMAP_BLOCK_IMAXRECS(level, cur); } +/* + * Get the maximum records we could store in the on-disk format. + * + * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but + * for the root node this checks the available space in the dinode fork + * so that we can resize the in-memory buffer to match it. After a + * resize to the maximum size this function returns the same value + * as xfs_bmbt_get_maxrecs for the root node, too. + */ +STATIC int +xfs_bmbt_get_dmaxrecs( + struct xfs_btree_cur *cur, + int level) +{ + return XFS_BMAP_BLOCK_DMAXRECS(level, cur); +} + STATIC void xfs_bmbt_init_key_from_rec( union xfs_btree_key *key, @@ -1553,6 +1332,25 @@ xfs_bmbt_init_key_from_rec( cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); } +STATIC void +xfs_bmbt_init_rec_from_key( + union xfs_btree_key *key, + union xfs_btree_rec *rec) +{ + ASSERT(key->bmbt.br_startoff != 0); + + xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), + 0, 0, XFS_EXT_NORM); +} + +STATIC void +xfs_bmbt_init_rec_from_cur( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec) +{ + xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); +} + STATIC void xfs_bmbt_init_ptr_from_cur( struct xfs_btree_cur *cur, @@ -1660,9 +1458,13 @@ static const struct xfs_btree_ops xfs_bmbt_ops = { .key_len = sizeof(xfs_bmbt_key_t), .dup_cursor = xfs_bmbt_dup_cursor, + .update_cursor = xfs_bmbt_update_cursor, .alloc_block = xfs_bmbt_alloc_block, .get_maxrecs = xfs_bmbt_get_maxrecs, + .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, .init_key_from_rec = xfs_bmbt_init_key_from_rec, + .init_rec_from_key = xfs_bmbt_init_rec_from_key, + .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, .key_diff = xfs_bmbt_key_diff, diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index 26fd8ace3e7..703fe2e3434 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -250,7 +250,6 @@ extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s); extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); -extern int xfs_bmbt_insert(struct xfs_btree_cur *, int *); extern void xfs_bmbt_log_block(struct xfs_btree_cur *, struct xfs_buf *, int); extern void xfs_bmbt_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int, int); diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 3b6e01dea66..36477aae77d 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -963,6 +963,17 @@ xfs_btree_ptr_is_null( return be32_to_cpu(ptr->s) == NULLAGBLOCK; } +STATIC void +xfs_btree_set_ptr_null( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *ptr) +{ + if (cur->bc_flags & XFS_BTREE_LONG_PTRS) + ptr->l = cpu_to_be64(NULLFSBLOCK); + else + ptr->s = cpu_to_be32(NULLAGBLOCK); +} + /* * Get/set/init sibling pointers */ @@ -2697,3 +2708,354 @@ out0: *stat = 0; return 0; } + +STATIC int +xfs_btree_make_block_unfull( + struct xfs_btree_cur *cur, /* btree cursor */ + int level, /* btree level */ + int numrecs,/* # of recs in block */ + int *oindex,/* old tree index */ + int *index, /* new tree index */ + union xfs_btree_ptr *nptr, /* new btree ptr */ + struct xfs_btree_cur **ncur, /* new btree cursor */ + union xfs_btree_rec *nrec, /* new record */ + int *stat) +{ + union xfs_btree_key key; /* new btree key value */ + int error = 0; + + if ((cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) && + level == cur->bc_nlevels - 1) { + struct xfs_inode *ip = cur->bc_private.b.ip; + + if (numrecs < cur->bc_ops->get_dmaxrecs(cur, level)) { + /* A root block that can be made bigger. */ + + xfs_iroot_realloc(ip, 1, cur->bc_private.b.whichfork); + } else { + /* A root block that needs replacing */ + int logflags = 0; + + error = xfs_btree_new_iroot(cur, &logflags, stat); + if (error || *stat == 0) + return error; + + xfs_trans_log_inode(cur->bc_tp, ip, logflags); + } + + return 0; + } + + /* First, try shifting an entry to the right neighbor. */ + error = xfs_btree_rshift(cur, level, stat); + if (error || *stat) + return error; + + /* Next, try shifting an entry to the left neighbor. */ + error = xfs_btree_lshift(cur, level, stat); + if (error) + return error; + + if (*stat) { + *oindex = *index = cur->bc_ptrs[level]; + return 0; + } + + /* + * Next, try splitting the current block in half. + * + * If this works we have to re-set our variables because we + * could be in a different block now. + */ + error = xfs_btree_split(cur, level, nptr, &key, ncur, stat); + if (error || *stat == 0) + return error; + + + *index = cur->bc_ptrs[level]; + cur->bc_ops->init_rec_from_key(&key, nrec); + return 0; +} + +/* + * Insert one record/level. Return information to the caller + * allowing the next level up to proceed if necessary. + */ +STATIC int +xfs_btree_insrec( + struct xfs_btree_cur *cur, /* btree cursor */ + int level, /* level to insert record at */ + union xfs_btree_ptr *ptrp, /* i/o: block number inserted */ + union xfs_btree_rec *recp, /* i/o: record data inserted */ + struct xfs_btree_cur **curp, /* output: new cursor replacing cur */ + int *stat) /* success/failure */ +{ + struct xfs_btree_block *block; /* btree block */ + struct xfs_buf *bp; /* buffer for block */ + union xfs_btree_key key; /* btree key */ + union xfs_btree_ptr nptr; /* new block ptr */ + struct xfs_btree_cur *ncur; /* new btree cursor */ + union xfs_btree_rec nrec; /* new record count */ + int optr; /* old key/record index */ + int ptr; /* key/record index */ + int numrecs;/* number of records */ + int error; /* error return value */ +#ifdef DEBUG + int i; +#endif + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGIPR(cur, level, *ptrp, recp); + + ncur = NULL; + + /* + * If we have an external root pointer, and we've made it to the + * root level, allocate a new root block and we're done. + */ + if (!(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) && + (level >= cur->bc_nlevels)) { + error = xfs_btree_new_root(cur, stat); + xfs_btree_set_ptr_null(cur, ptrp); + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + return error; + } + + /* If we're off the left edge, return failure. */ + ptr = cur->bc_ptrs[level]; + if (ptr == 0) { + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 0; + return 0; + } + + /* Make a key out of the record data to be inserted, and save it. */ + cur->bc_ops->init_key_from_rec(&key, recp); + + optr = ptr; + + XFS_BTREE_STATS_INC(cur, insrec); + + /* Get pointers to the btree buffer and block. */ + block = xfs_btree_get_block(cur, level, &bp); + numrecs = xfs_btree_get_numrecs(block); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, level, bp); + if (error) + goto error0; + + /* Check that the new entry is being inserted in the right place. */ + if (ptr <= numrecs) { + if (level == 0) { + xfs_btree_check_rec(cur->bc_btnum, recp, + xfs_btree_rec_addr(cur, ptr, block)); + } else { + xfs_btree_check_key(cur->bc_btnum, &key, + xfs_btree_key_addr(cur, ptr, block)); + } + } +#endif + + /* + * If the block is full, we can't insert the new entry until we + * make the block un-full. + */ + xfs_btree_set_ptr_null(cur, &nptr); + if (numrecs == cur->bc_ops->get_maxrecs(cur, level)) { + error = xfs_btree_make_block_unfull(cur, level, numrecs, + &optr, &ptr, &nptr, &ncur, &nrec, stat); + if (error || *stat == 0) + goto error0; + } + + /* + * The current block may have changed if the block was + * previously full and we have just made space in it. + */ + block = xfs_btree_get_block(cur, level, &bp); + numrecs = xfs_btree_get_numrecs(block); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, level, bp); + if (error) + return error; +#endif + + /* + * At this point we know there's room for our new entry in the block + * we're pointing at. + */ + XFS_BTREE_STATS_ADD(cur, moves, numrecs - ptr + 1); + + if (level > 0) { + /* It's a nonleaf. make a hole in the keys and ptrs */ + union xfs_btree_key *kp; + union xfs_btree_ptr *pp; + + kp = xfs_btree_key_addr(cur, ptr, block); + pp = xfs_btree_ptr_addr(cur, ptr, block); + +#ifdef DEBUG + for (i = numrecs - ptr; i >= 0; i--) { + error = xfs_btree_check_ptr(cur, pp, i, level); + if (error) + return error; + } +#endif + + xfs_btree_shift_keys(cur, kp, 1, numrecs - ptr + 1); + xfs_btree_shift_ptrs(cur, pp, 1, numrecs - ptr + 1); + +#ifdef DEBUG + error = xfs_btree_check_ptr(cur, ptrp, 0, level); + if (error) + goto error0; +#endif + + /* Now put the new data in, bump numrecs and log it. */ + xfs_btree_copy_keys(cur, kp, &key, 1); + xfs_btree_copy_ptrs(cur, pp, ptrp, 1); + numrecs++; + xfs_btree_set_numrecs(block, numrecs); + xfs_btree_log_ptrs(cur, bp, ptr, numrecs); + xfs_btree_log_keys(cur, bp, ptr, numrecs); +#ifdef DEBUG + if (ptr < numrecs) { + xfs_btree_check_key(cur->bc_btnum, kp, + xfs_btree_key_addr(cur, ptr + 1, block)); + } +#endif + } else { + /* It's a leaf. make a hole in the records */ + union xfs_btree_rec *rp; + + rp = xfs_btree_rec_addr(cur, ptr, block); + + xfs_btree_shift_recs(cur, rp, 1, numrecs - ptr + 1); + + /* Now put the new data in, bump numrecs and log it. */ + xfs_btree_copy_recs(cur, rp, recp, 1); + xfs_btree_set_numrecs(block, ++numrecs); + xfs_btree_log_recs(cur, bp, ptr, numrecs); +#ifdef DEBUG + if (ptr < numrecs) { + xfs_btree_check_rec(cur->bc_btnum, rp, + xfs_btree_rec_addr(cur, ptr + 1, block)); + } +#endif + } + + /* Log the new number of records in the btree header. */ + xfs_btree_log_block(cur, bp, XFS_BB_NUMRECS); + + /* If we inserted at the start of a block, update the parents' keys. */ + if (optr == 1) { + error = xfs_btree_updkey(cur, &key, level + 1); + if (error) + goto error0; + } + + /* + * If we are tracking the last record in the tree and + * we are at the far right edge of the tree, update it. + */ + if (xfs_btree_is_lastrec(cur, block, level)) { + cur->bc_ops->update_lastrec(cur, block, recp, + ptr, LASTREC_INSREC); + } + + /* + * Return the new block number, if any. + * If there is one, give back a record value and a cursor too. + */ + *ptrp = nptr; + if (!xfs_btree_ptr_is_null(cur, &nptr)) { + *recp = nrec; + *curp = ncur; + } + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 1; + return 0; + +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} + +/* + * Insert the record at the point referenced by cur. + * + * A multi-level split of the tree on insert will invalidate the original + * cursor. All callers of this function should assume that the cursor is + * no longer valid and revalidate it. + */ +int +xfs_btree_insert( + struct xfs_btree_cur *cur, + int *stat) +{ + int error; /* error return value */ + int i; /* result value, 0 for failure */ + int level; /* current level number in btree */ + union xfs_btree_ptr nptr; /* new block number (split result) */ + struct xfs_btree_cur *ncur; /* new cursor (split result) */ + struct xfs_btree_cur *pcur; /* previous level's cursor */ + union xfs_btree_rec rec; /* record to insert */ + + level = 0; + ncur = NULL; + pcur = cur; + + xfs_btree_set_ptr_null(cur, &nptr); + cur->bc_ops->init_rec_from_cur(cur, &rec); + + /* + * Loop going up the tree, starting at the leaf level. + * Stop when we don't get a split block, that must mean that + * the insert is finished with this level. + */ + do { + /* + * Insert nrec/nptr into this level of the tree. + * Note if we fail, nptr will be null. + */ + error = xfs_btree_insrec(pcur, level, &nptr, &rec, &ncur, &i); + if (error) { + if (pcur != cur) + xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR); + goto error0; + } + + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + level++; + + /* + * See if the cursor we just used is trash. + * Can't trash the caller's cursor, but otherwise we should + * if ncur is a new cursor or we're about to be done. + */ + if (pcur != cur && + (ncur || xfs_btree_ptr_is_null(cur, &nptr))) { + /* Save the state from the cursor before we trash it */ + if (cur->bc_ops->update_cursor) + cur->bc_ops->update_cursor(pcur, cur); + cur->bc_nlevels = pcur->bc_nlevels; + xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR); + } + /* If we got a new cursor, switch to it. */ + if (ncur) { + pcur = ncur; + ncur = NULL; + } + } while (!xfs_btree_ptr_is_null(cur, &nptr)); + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = i; + return 0; +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index 21eec863f00..6f03871f599 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -186,6 +186,8 @@ struct xfs_btree_ops { /* cursor operations */ struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *); + void (*update_cursor)(struct xfs_btree_cur *src, + struct xfs_btree_cur *dst); /* update btree root pointer */ void (*set_root)(struct xfs_btree_cur *cur, @@ -206,9 +208,16 @@ struct xfs_btree_ops { /* records in block/level */ int (*get_maxrecs)(struct xfs_btree_cur *cur, int level); + /* records on disk. Matter for the root in inode case. */ + int (*get_dmaxrecs)(struct xfs_btree_cur *cur, int level); + /* init values of btree structures */ void (*init_key_from_rec)(union xfs_btree_key *key, union xfs_btree_rec *rec); + void (*init_rec_from_key)(union xfs_btree_key *key, + union xfs_btree_rec *rec); + void (*init_rec_from_cur)(struct xfs_btree_cur *cur, + union xfs_btree_rec *rec); void (*init_ptr_from_cur)(struct xfs_btree_cur *cur, union xfs_btree_ptr *ptr); @@ -240,6 +249,7 @@ struct xfs_btree_ops { * Reasons for the update_lastrec method to be called. */ #define LASTREC_UPDATE 0 +#define LASTREC_INSREC 1 /* @@ -549,6 +559,7 @@ int xfs_btree_split(struct xfs_btree_cur *, int, union xfs_btree_ptr *, union xfs_btree_key *, struct xfs_btree_cur **, int *); int xfs_btree_new_root(struct xfs_btree_cur *, int *); int xfs_btree_new_iroot(struct xfs_btree_cur *, int *, int *); +int xfs_btree_insert(struct xfs_btree_cur *, int *); /* * Helpers. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 138651afd44..b68e73bb17c 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -418,7 +418,7 @@ xfs_ialloc_ag_alloc( return error; } ASSERT(i == 0); - if ((error = xfs_inobt_insert(cur, &i))) { + if ((error = xfs_btree_insert(cur, &i))) { xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); return error; } diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 7ba3c7bb398..8f66e272056 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -514,228 +514,6 @@ error0: return error; } -/* - * Insert one record/level. Return information to the caller - * allowing the next level up to proceed if necessary. - */ -STATIC int /* error */ -xfs_inobt_insrec( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level to insert record at */ - xfs_agblock_t *bnop, /* i/o: block number inserted */ - xfs_inobt_rec_t *recp, /* i/o: record data inserted */ - xfs_btree_cur_t **curp, /* output: new cursor replacing cur */ - int *stat) /* success/failure */ -{ - xfs_inobt_block_t *block; /* btree block record/key lives in */ - xfs_buf_t *bp; /* buffer for block */ - int error; /* error return value */ - int i; /* loop index */ - xfs_inobt_key_t key; /* key value being inserted */ - xfs_inobt_key_t *kp=NULL; /* pointer to btree keys */ - xfs_agblock_t nbno; /* block number of allocated block */ - xfs_btree_cur_t *ncur; /* new cursor to be used at next lvl */ - xfs_inobt_key_t nkey; /* new key value, from split */ - xfs_inobt_rec_t nrec; /* new record value, for caller */ - int numrecs; - int optr; /* old ptr value */ - xfs_inobt_ptr_t *pp; /* pointer to btree addresses */ - int ptr; /* index in btree block for this rec */ - xfs_inobt_rec_t *rp=NULL; /* pointer to btree records */ - - /* - * GCC doesn't understand the (arguably complex) control flow in - * this function and complains about uninitialized structure fields - * without this. - */ - memset(&nrec, 0, sizeof(nrec)); - - /* - * If we made it to the root level, allocate a new root block - * and we're done. - */ - if (level >= cur->bc_nlevels) { - error = xfs_btree_new_root(cur, &i); - *bnop = NULLAGBLOCK; - *stat = i; - return error; - } - /* - * Make a key out of the record data to be inserted, and save it. - */ - key.ir_startino = recp->ir_startino; - optr = ptr = cur->bc_ptrs[level]; - /* - * If we're off the left edge, return failure. - */ - if (ptr == 0) { - *stat = 0; - return 0; - } - /* - * Get pointers to the btree buffer and block. - */ - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); - numrecs = be16_to_cpu(block->bb_numrecs); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, bp))) - return error; - /* - * Check that the new entry is being inserted in the right place. - */ - if (ptr <= numrecs) { - if (level == 0) { - rp = XFS_INOBT_REC_ADDR(block, ptr, cur); - xfs_btree_check_rec(cur->bc_btnum, recp, rp); - } else { - kp = XFS_INOBT_KEY_ADDR(block, ptr, cur); - xfs_btree_check_key(cur->bc_btnum, &key, kp); - } - } -#endif - nbno = NULLAGBLOCK; - ncur = NULL; - /* - * If the block is full, we can't insert the new entry until we - * make the block un-full. - */ - if (numrecs == XFS_INOBT_BLOCK_MAXRECS(level, cur)) { - /* - * First, try shifting an entry to the right neighbor. - */ - if ((error = xfs_btree_rshift(cur, level, &i))) - return error; - if (i) { - /* nothing */ - } - /* - * Next, try shifting an entry to the left neighbor. - */ - else { - if ((error = xfs_btree_lshift(cur, level, &i))) - return error; - if (i) { - optr = ptr = cur->bc_ptrs[level]; - } else { - union xfs_btree_ptr bno = { .s = cpu_to_be32(nbno) }; - /* - * Next, try splitting the current block - * in half. If this works we have to - * re-set our variables because - * we could be in a different block now. - */ - if ((error = xfs_btree_split(cur, level, &bno, - (union xfs_btree_key *)&nkey, - &ncur, &i))) - return error; - nbno = be32_to_cpu(bno.s); - if (i) { - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, - block, level, bp))) - return error; -#endif - ptr = cur->bc_ptrs[level]; - nrec.ir_startino = nkey.ir_startino; - } else { - /* - * Otherwise the insert fails. - */ - *stat = 0; - return 0; - } - } - } - } - /* - * At this point we know there's room for our new entry in the block - * we're pointing at. - */ - numrecs = be16_to_cpu(block->bb_numrecs); - if (level > 0) { - /* - * It's a non-leaf entry. Make a hole for the new data - * in the key and ptr regions of the block. - */ - kp = XFS_INOBT_KEY_ADDR(block, 1, cur); - pp = XFS_INOBT_PTR_ADDR(block, 1, cur); -#ifdef DEBUG - for (i = numrecs; i >= ptr; i--) { - if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(pp[i - 1]), level))) - return error; - } -#endif - memmove(&kp[ptr], &kp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*kp)); - memmove(&pp[ptr], &pp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*pp)); - /* - * Now stuff the new data in, bump numrecs and log the new data. - */ -#ifdef DEBUG - if ((error = xfs_btree_check_sptr(cur, *bnop, level))) - return error; -#endif - kp[ptr - 1] = key; - pp[ptr - 1] = cpu_to_be32(*bnop); - numrecs++; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_inobt_log_keys(cur, bp, ptr, numrecs); - xfs_inobt_log_ptrs(cur, bp, ptr, numrecs); - } else { - /* - * It's a leaf entry. Make a hole for the new record. - */ - rp = XFS_INOBT_REC_ADDR(block, 1, cur); - memmove(&rp[ptr], &rp[ptr - 1], - (numrecs - ptr + 1) * sizeof(*rp)); - /* - * Now stuff the new record in, bump numrecs - * and log the new data. - */ - rp[ptr - 1] = *recp; - numrecs++; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_inobt_log_recs(cur, bp, ptr, numrecs); - } - /* - * Log the new number of records in the btree header. - */ - xfs_inobt_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS); -#ifdef DEBUG - /* - * Check that the key/record is in the right place, now. - */ - if (ptr < numrecs) { - if (level == 0) - xfs_btree_check_rec(cur->bc_btnum, rp + ptr - 1, - rp + ptr); - else - xfs_btree_check_key(cur->bc_btnum, kp + ptr - 1, - kp + ptr); - } -#endif - /* - * If we inserted at the start of a block, update the parents' keys. - */ - if (optr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)&key, level + 1))) - return error; - /* - * Return the new block number, if any. - * If there is one, give back a record value and a cursor too. - */ - *bnop = nbno; - if (nbno != NULLAGBLOCK) { - *recp = nrec; - *curp = ncur; - } - *stat = 1; - return 0; -} - /* * Log header fields from a btree block. */ @@ -912,66 +690,6 @@ xfs_inobt_get_rec( return 0; } -/* - * Insert the current record at the point referenced by cur. - * The cursor may be inconsistent on return if splits have been done. - */ -int /* error */ -xfs_inobt_insert( - xfs_btree_cur_t *cur, /* btree cursor */ - int *stat) /* success/failure */ -{ - int error; /* error return value */ - int i; /* result value, 0 for failure */ - int level; /* current level number in btree */ - xfs_agblock_t nbno; /* new block number (split result) */ - xfs_btree_cur_t *ncur; /* new cursor (split result) */ - xfs_inobt_rec_t nrec; /* record being inserted this level */ - xfs_btree_cur_t *pcur; /* previous level's cursor */ - - level = 0; - nbno = NULLAGBLOCK; - nrec.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino); - nrec.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount); - nrec.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free); - ncur = NULL; - pcur = cur; - /* - * Loop going up the tree, starting at the leaf level. - * Stop when we don't get a split block, that must mean that - * the insert is finished with this level. - */ - do { - /* - * Insert nrec/nbno into this level of the tree. - * Note if we fail, nbno will be null. - */ - if ((error = xfs_inobt_insrec(pcur, level++, &nbno, &nrec, &ncur, - &i))) { - if (pcur != cur) - xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR); - return error; - } - /* - * See if the cursor we just used is trash. - * Can't trash the caller's cursor, but otherwise we should - * if ncur is a new cursor or we're about to be done. - */ - if (pcur != cur && (ncur || nbno == NULLAGBLOCK)) { - cur->bc_nlevels = pcur->bc_nlevels; - xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR); - } - /* - * If we got a new cursor, switch to it. - */ - if (ncur) { - pcur = ncur; - ncur = NULL; - } - } while (nbno != NULLAGBLOCK); - *stat = i; - return 0; -} STATIC struct xfs_btree_cur * xfs_inobt_dup_cursor( @@ -1053,6 +771,24 @@ xfs_inobt_init_key_from_rec( key->inobt.ir_startino = rec->inobt.ir_startino; } +STATIC void +xfs_inobt_init_rec_from_key( + union xfs_btree_key *key, + union xfs_btree_rec *rec) +{ + rec->inobt.ir_startino = key->inobt.ir_startino; +} + +STATIC void +xfs_inobt_init_rec_from_cur( + struct xfs_btree_cur *cur, + union xfs_btree_rec *rec) +{ + rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino); + rec->inobt.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount); + rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free); +} + /* * intial value of ptr for lookup */ @@ -1152,6 +888,8 @@ static const struct xfs_btree_ops xfs_inobt_ops = { .alloc_block = xfs_inobt_alloc_block, .get_maxrecs = xfs_inobt_get_maxrecs, .init_key_from_rec = xfs_inobt_init_key_from_rec, + .init_rec_from_key = xfs_inobt_init_rec_from_key, + .init_rec_from_cur = xfs_inobt_init_rec_from_cur, .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur, .key_diff = xfs_inobt_key_diff, diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 7f77549e82a..c9cbc4f2168 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -129,12 +129,6 @@ extern int xfs_inobt_delete(struct xfs_btree_cur *cur, int *stat); extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino, __int32_t *fcnt, xfs_inofree_t *free, int *stat); -/* - * Insert the current record at the point referenced by cur. - * The cursor may be inconsistent on return if splits have been done. - */ -extern int xfs_inobt_insert(struct xfs_btree_cur *cur, int *stat); - extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t); -- cgit v1.2.3-70-g09d2 From 91cca5df9bc85efdabfa645f51d54259ed09f4bf Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:58:01 +1100 Subject: [XFS] implement generic xfs_btree_delete/delrec Make the btree delete code generic. Based on a patch from David Chinner with lots of changes to follow the original btree implementations more closely. While this loses some of the generic helper routines for inserting/moving/removing records it also solves some of the one off bugs in the original code and makes it easier to verify. SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32205a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 14 +- fs/xfs/xfs_alloc_btree.c | 744 ++++------------------------------------------ fs/xfs/xfs_alloc_btree.h | 7 - fs/xfs/xfs_bmap.c | 14 +- fs/xfs/xfs_bmap_btree.c | 525 +------------------------------- fs/xfs/xfs_bmap_btree.h | 3 - fs/xfs/xfs_btree.c | 593 ++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 5 + fs/xfs/xfs_ialloc.c | 4 +- fs/xfs/xfs_ialloc_btree.c | 646 +++------------------------------------- fs/xfs/xfs_ialloc_btree.h | 7 - 11 files changed, 723 insertions(+), 1839 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index a983824c12b..e9c70249d2c 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -398,7 +398,7 @@ xfs_alloc_fixup_trees( /* * Delete the entry from the by-size btree. */ - if ((error = xfs_alloc_delete(cnt_cur, &i))) + if ((error = xfs_btree_delete(cnt_cur, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 1); /* @@ -427,7 +427,7 @@ xfs_alloc_fixup_trees( /* * No remaining freespace, just delete the by-block tree entry. */ - if ((error = xfs_alloc_delete(bno_cur, &i))) + if ((error = xfs_btree_delete(bno_cur, &i))) return error; XFS_WANT_CORRUPTED_RETURN(i == 1); } else { @@ -1651,7 +1651,7 @@ xfs_free_ag_extent( if ((error = xfs_alloc_lookup_eq(cnt_cur, ltbno, ltlen, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_delete(cnt_cur, &i))) + if ((error = xfs_btree_delete(cnt_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); /* @@ -1660,13 +1660,13 @@ xfs_free_ag_extent( if ((error = xfs_alloc_lookup_eq(cnt_cur, gtbno, gtlen, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_delete(cnt_cur, &i))) + if ((error = xfs_btree_delete(cnt_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); /* * Delete the old by-block entry for the right block. */ - if ((error = xfs_alloc_delete(bno_cur, &i))) + if ((error = xfs_btree_delete(bno_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); /* @@ -1711,7 +1711,7 @@ xfs_free_ag_extent( if ((error = xfs_alloc_lookup_eq(cnt_cur, ltbno, ltlen, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_delete(cnt_cur, &i))) + if ((error = xfs_btree_delete(cnt_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); /* @@ -1737,7 +1737,7 @@ xfs_free_ag_extent( if ((error = xfs_alloc_lookup_eq(cnt_cur, gtbno, gtlen, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_alloc_delete(cnt_cur, &i))) + if ((error = xfs_btree_delete(cnt_cur, &i))) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); /* diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index f124ddd91c0..d256b51f913 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -40,691 +40,6 @@ #include "xfs_alloc.h" #include "xfs_error.h" -/* - * Prototypes for internal functions. - */ - -STATIC void xfs_alloc_log_block(xfs_trans_t *, xfs_buf_t *, int); -STATIC void xfs_alloc_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int); -STATIC void xfs_alloc_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int); -STATIC void xfs_alloc_log_recs(xfs_btree_cur_t *, xfs_buf_t *, int, int); - -/* - * Internal functions. - */ - -/* - * Single level of the xfs_alloc_delete record deletion routine. - * Delete record pointed to by cur/level. - * Remove the record from its block then rebalance the tree. - * Return 0 for error, 1 for done, 2 to go on to the next level. - */ -STATIC int /* error */ -xfs_alloc_delrec( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level removing record from */ - int *stat) /* fail/done/go-on */ -{ - xfs_agf_t *agf; /* allocation group freelist header */ - xfs_alloc_block_t *block; /* btree block record/key lives in */ - xfs_agblock_t bno; /* btree block number */ - xfs_buf_t *bp; /* buffer for block */ - int error; /* error return value */ - int i; /* loop index */ - xfs_alloc_key_t key; /* kp points here if block is level 0 */ - xfs_agblock_t lbno; /* left block's block number */ - xfs_buf_t *lbp; /* left block's buffer pointer */ - xfs_alloc_block_t *left; /* left btree block */ - xfs_alloc_key_t *lkp=NULL; /* left block key pointer */ - xfs_alloc_ptr_t *lpp=NULL; /* left block address pointer */ - int lrecs=0; /* number of records in left block */ - xfs_alloc_rec_t *lrp; /* left block record pointer */ - xfs_mount_t *mp; /* mount structure */ - int ptr; /* index in btree block for this rec */ - xfs_agblock_t rbno; /* right block's block number */ - xfs_buf_t *rbp; /* right block's buffer pointer */ - xfs_alloc_block_t *right; /* right btree block */ - xfs_alloc_key_t *rkp; /* right block key pointer */ - xfs_alloc_ptr_t *rpp; /* right block address pointer */ - int rrecs=0; /* number of records in right block */ - int numrecs; - xfs_alloc_rec_t *rrp; /* right block record pointer */ - xfs_btree_cur_t *tcur; /* temporary btree cursor */ - - /* - * Get the index of the entry being deleted, check for nothing there. - */ - ptr = cur->bc_ptrs[level]; - if (ptr == 0) { - *stat = 0; - return 0; - } - /* - * Get the buffer & block containing the record or key/ptr. - */ - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_ALLOC_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, bp))) - return error; -#endif - /* - * Fail if we're off the end of the block. - */ - numrecs = be16_to_cpu(block->bb_numrecs); - if (ptr > numrecs) { - *stat = 0; - return 0; - } - XFS_STATS_INC(xs_abt_delrec); - /* - * It's a nonleaf. Excise the key and ptr being deleted, by - * sliding the entries past them down one. - * Log the changed areas of the block. - */ - if (level > 0) { - lkp = XFS_ALLOC_KEY_ADDR(block, 1, cur); - lpp = XFS_ALLOC_PTR_ADDR(block, 1, cur); -#ifdef DEBUG - for (i = ptr; i < numrecs; i++) { - if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(lpp[i]), level))) - return error; - } -#endif - if (ptr < numrecs) { - memmove(&lkp[ptr - 1], &lkp[ptr], - (numrecs - ptr) * sizeof(*lkp)); - memmove(&lpp[ptr - 1], &lpp[ptr], - (numrecs - ptr) * sizeof(*lpp)); - xfs_alloc_log_ptrs(cur, bp, ptr, numrecs - 1); - xfs_alloc_log_keys(cur, bp, ptr, numrecs - 1); - } - } - /* - * It's a leaf. Excise the record being deleted, by sliding the - * entries past it down one. Log the changed areas of the block. - */ - else { - lrp = XFS_ALLOC_REC_ADDR(block, 1, cur); - if (ptr < numrecs) { - memmove(&lrp[ptr - 1], &lrp[ptr], - (numrecs - ptr) * sizeof(*lrp)); - xfs_alloc_log_recs(cur, bp, ptr, numrecs - 1); - } - /* - * If it's the first record in the block, we'll need a key - * structure to pass up to the next level (updkey). - */ - if (ptr == 1) { - key.ar_startblock = lrp->ar_startblock; - key.ar_blockcount = lrp->ar_blockcount; - lkp = &key; - } - } - /* - * Decrement and log the number of entries in the block. - */ - numrecs--; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_alloc_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS); - /* - * See if the longest free extent in the allocation group was - * changed by this operation. True if it's the by-size btree, and - * this is the leaf level, and there is no right sibling block, - * and this was the last record. - */ - agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); - mp = cur->bc_mp; - - if (level == 0 && - cur->bc_btnum == XFS_BTNUM_CNT && - be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK && - ptr > numrecs) { - ASSERT(ptr == numrecs + 1); - /* - * There are still records in the block. Grab the size - * from the last one. - */ - if (numrecs) { - rrp = XFS_ALLOC_REC_ADDR(block, numrecs, cur); - agf->agf_longest = rrp->ar_blockcount; - } - /* - * No free extents left. - */ - else - agf->agf_longest = 0; - mp->m_perag[be32_to_cpu(agf->agf_seqno)].pagf_longest = - be32_to_cpu(agf->agf_longest); - xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, - XFS_AGF_LONGEST); - } - /* - * Is this the root level? If so, we're almost done. - */ - if (level == cur->bc_nlevels - 1) { - /* - * If this is the root level, - * and there's only one entry left, - * and it's NOT the leaf level, - * then we can get rid of this level. - */ - if (numrecs == 1 && level > 0) { - /* - * lpp is still set to the first pointer in the block. - * Make it the new root of the btree. - */ - bno = be32_to_cpu(agf->agf_roots[cur->bc_btnum]); - agf->agf_roots[cur->bc_btnum] = *lpp; - be32_add_cpu(&agf->agf_levels[cur->bc_btnum], -1); - mp->m_perag[be32_to_cpu(agf->agf_seqno)].pagf_levels[cur->bc_btnum]--; - /* - * Put this buffer/block on the ag's freelist. - */ - error = xfs_alloc_put_freelist(cur->bc_tp, - cur->bc_private.a.agbp, NULL, bno, 1); - if (error) - return error; - /* - * Since blocks move to the free list without the - * coordination used in xfs_bmap_finish, we can't allow - * block to be available for reallocation and - * non-transaction writing (user data) until we know - * that the transaction that moved it to the free list - * is permanently on disk. We track the blocks by - * declaring these blocks as "busy"; the busy list is - * maintained on a per-ag basis and each transaction - * records which entries should be removed when the - * iclog commits to disk. If a busy block is - * allocated, the iclog is pushed up to the LSN - * that freed the block. - */ - xfs_alloc_mark_busy(cur->bc_tp, - be32_to_cpu(agf->agf_seqno), bno, 1); - - xfs_trans_agbtree_delta(cur->bc_tp, -1); - xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, - XFS_AGF_ROOTS | XFS_AGF_LEVELS); - /* - * Update the cursor so there's one fewer level. - */ - xfs_btree_setbuf(cur, level, NULL); - cur->bc_nlevels--; - } else if (level > 0 && - (error = xfs_btree_decrement(cur, level, &i))) - return error; - *stat = 1; - return 0; - } - /* - * If we deleted the leftmost entry in the block, update the - * key values above us in the tree. - */ - if (ptr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)lkp, level + 1))) - return error; - /* - * If the number of records remaining in the block is at least - * the minimum, we're done. - */ - if (numrecs >= XFS_ALLOC_BLOCK_MINRECS(level, cur)) { - if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) - return error; - *stat = 1; - return 0; - } - /* - * Otherwise, we have to move some records around to keep the - * tree balanced. Look at the left and right sibling blocks to - * see if we can re-balance by moving only one record. - */ - rbno = be32_to_cpu(block->bb_rightsib); - lbno = be32_to_cpu(block->bb_leftsib); - bno = NULLAGBLOCK; - ASSERT(rbno != NULLAGBLOCK || lbno != NULLAGBLOCK); - /* - * Duplicate the cursor so our btree manipulations here won't - * disrupt the next level up. - */ - if ((error = xfs_btree_dup_cursor(cur, &tcur))) - return error; - /* - * If there's a right sibling, see if it's ok to shift an entry - * out of it. - */ - if (rbno != NULLAGBLOCK) { - /* - * Move the temp cursor to the last entry in the next block. - * Actually any entry but the first would suffice. - */ - i = xfs_btree_lastrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_btree_increment(tcur, level, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - i = xfs_btree_lastrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - /* - * Grab a pointer to the block. - */ - rbp = tcur->bc_bufs[level]; - right = XFS_BUF_TO_ALLOC_BLOCK(rbp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, right, level, rbp))) - goto error0; -#endif - /* - * Grab the current block number, for future use. - */ - bno = be32_to_cpu(right->bb_leftsib); - /* - * If right block is full enough so that removing one entry - * won't make it too empty, and left-shifting an entry out - * of right to us works, we're done. - */ - if (be16_to_cpu(right->bb_numrecs) - 1 >= - XFS_ALLOC_BLOCK_MINRECS(level, cur)) { - if ((error = xfs_btree_lshift(tcur, level, &i))) - goto error0; - if (i) { - ASSERT(be16_to_cpu(block->bb_numrecs) >= - XFS_ALLOC_BLOCK_MINRECS(level, cur)); - xfs_btree_del_cursor(tcur, - XFS_BTREE_NOERROR); - if (level > 0 && - (error = xfs_btree_decrement(cur, level, - &i))) - return error; - *stat = 1; - return 0; - } - } - /* - * Otherwise, grab the number of records in right for - * future reference, and fix up the temp cursor to point - * to our block again (last record). - */ - rrecs = be16_to_cpu(right->bb_numrecs); - if (lbno != NULLAGBLOCK) { - i = xfs_btree_firstrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_btree_decrement(tcur, level, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - } - } - /* - * If there's a left sibling, see if it's ok to shift an entry - * out of it. - */ - if (lbno != NULLAGBLOCK) { - /* - * Move the temp cursor to the first entry in the - * previous block. - */ - i = xfs_btree_firstrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_btree_decrement(tcur, level, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - xfs_btree_firstrec(tcur, level); - /* - * Grab a pointer to the block. - */ - lbp = tcur->bc_bufs[level]; - left = XFS_BUF_TO_ALLOC_BLOCK(lbp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, left, level, lbp))) - goto error0; -#endif - /* - * Grab the current block number, for future use. - */ - bno = be32_to_cpu(left->bb_rightsib); - /* - * If left block is full enough so that removing one entry - * won't make it too empty, and right-shifting an entry out - * of left to us works, we're done. - */ - if (be16_to_cpu(left->bb_numrecs) - 1 >= - XFS_ALLOC_BLOCK_MINRECS(level, cur)) { - if ((error = xfs_btree_rshift(tcur, level, &i))) - goto error0; - if (i) { - ASSERT(be16_to_cpu(block->bb_numrecs) >= - XFS_ALLOC_BLOCK_MINRECS(level, cur)); - xfs_btree_del_cursor(tcur, - XFS_BTREE_NOERROR); - if (level == 0) - cur->bc_ptrs[0]++; - *stat = 1; - return 0; - } - } - /* - * Otherwise, grab the number of records in right for - * future reference. - */ - lrecs = be16_to_cpu(left->bb_numrecs); - } - /* - * Delete the temp cursor, we're done with it. - */ - xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); - /* - * If here, we need to do a join to keep the tree balanced. - */ - ASSERT(bno != NULLAGBLOCK); - /* - * See if we can join with the left neighbor block. - */ - if (lbno != NULLAGBLOCK && - lrecs + numrecs <= XFS_ALLOC_BLOCK_MAXRECS(level, cur)) { - /* - * Set "right" to be the starting block, - * "left" to be the left neighbor. - */ - rbno = bno; - right = block; - rrecs = be16_to_cpu(right->bb_numrecs); - rbp = bp; - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - cur->bc_private.a.agno, lbno, 0, &lbp, - XFS_ALLOC_BTREE_REF))) - return error; - left = XFS_BUF_TO_ALLOC_BLOCK(lbp); - lrecs = be16_to_cpu(left->bb_numrecs); - if ((error = xfs_btree_check_sblock(cur, left, level, lbp))) - return error; - } - /* - * If that won't work, see if we can join with the right neighbor block. - */ - else if (rbno != NULLAGBLOCK && - rrecs + numrecs <= XFS_ALLOC_BLOCK_MAXRECS(level, cur)) { - /* - * Set "left" to be the starting block, - * "right" to be the right neighbor. - */ - lbno = bno; - left = block; - lrecs = be16_to_cpu(left->bb_numrecs); - lbp = bp; - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - cur->bc_private.a.agno, rbno, 0, &rbp, - XFS_ALLOC_BTREE_REF))) - return error; - right = XFS_BUF_TO_ALLOC_BLOCK(rbp); - rrecs = be16_to_cpu(right->bb_numrecs); - if ((error = xfs_btree_check_sblock(cur, right, level, rbp))) - return error; - } - /* - * Otherwise, we can't fix the imbalance. - * Just return. This is probably a logic error, but it's not fatal. - */ - else { - if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) - return error; - *stat = 1; - return 0; - } - /* - * We're now going to join "left" and "right" by moving all the stuff - * in "right" to "left" and deleting "right". - */ - if (level > 0) { - /* - * It's a non-leaf. Move keys and pointers. - */ - lkp = XFS_ALLOC_KEY_ADDR(left, lrecs + 1, cur); - lpp = XFS_ALLOC_PTR_ADDR(left, lrecs + 1, cur); - rkp = XFS_ALLOC_KEY_ADDR(right, 1, cur); - rpp = XFS_ALLOC_PTR_ADDR(right, 1, cur); -#ifdef DEBUG - for (i = 0; i < rrecs; i++) { - if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i]), level))) - return error; - } -#endif - memcpy(lkp, rkp, rrecs * sizeof(*lkp)); - memcpy(lpp, rpp, rrecs * sizeof(*lpp)); - xfs_alloc_log_keys(cur, lbp, lrecs + 1, lrecs + rrecs); - xfs_alloc_log_ptrs(cur, lbp, lrecs + 1, lrecs + rrecs); - } else { - /* - * It's a leaf. Move records. - */ - lrp = XFS_ALLOC_REC_ADDR(left, lrecs + 1, cur); - rrp = XFS_ALLOC_REC_ADDR(right, 1, cur); - memcpy(lrp, rrp, rrecs * sizeof(*lrp)); - xfs_alloc_log_recs(cur, lbp, lrecs + 1, lrecs + rrecs); - } - /* - * If we joined with the left neighbor, set the buffer in the - * cursor to the left block, and fix up the index. - */ - if (bp != lbp) { - xfs_btree_setbuf(cur, level, lbp); - cur->bc_ptrs[level] += lrecs; - } - /* - * If we joined with the right neighbor and there's a level above - * us, increment the cursor at that level. - */ - else if (level + 1 < cur->bc_nlevels && - (error = xfs_btree_increment(cur, level + 1, &i))) - return error; - /* - * Fix up the number of records in the surviving block. - */ - lrecs += rrecs; - left->bb_numrecs = cpu_to_be16(lrecs); - /* - * Fix up the right block pointer in the surviving block, and log it. - */ - left->bb_rightsib = right->bb_rightsib; - xfs_alloc_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB); - /* - * If there is a right sibling now, make it point to the - * remaining block. - */ - if (be32_to_cpu(left->bb_rightsib) != NULLAGBLOCK) { - xfs_alloc_block_t *rrblock; - xfs_buf_t *rrbp; - - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - cur->bc_private.a.agno, be32_to_cpu(left->bb_rightsib), 0, - &rrbp, XFS_ALLOC_BTREE_REF))) - return error; - rrblock = XFS_BUF_TO_ALLOC_BLOCK(rrbp); - if ((error = xfs_btree_check_sblock(cur, rrblock, level, rrbp))) - return error; - rrblock->bb_leftsib = cpu_to_be32(lbno); - xfs_alloc_log_block(cur->bc_tp, rrbp, XFS_BB_LEFTSIB); - } - /* - * Free the deleting block by putting it on the freelist. - */ - error = xfs_alloc_put_freelist(cur->bc_tp, - cur->bc_private.a.agbp, NULL, rbno, 1); - if (error) - return error; - /* - * Since blocks move to the free list without the coordination - * used in xfs_bmap_finish, we can't allow block to be available - * for reallocation and non-transaction writing (user data) - * until we know that the transaction that moved it to the free - * list is permanently on disk. We track the blocks by declaring - * these blocks as "busy"; the busy list is maintained on a - * per-ag basis and each transaction records which entries - * should be removed when the iclog commits to disk. If a - * busy block is allocated, the iclog is pushed up to the - * LSN that freed the block. - */ - xfs_alloc_mark_busy(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1); - xfs_trans_agbtree_delta(cur->bc_tp, -1); - - /* - * Adjust the current level's cursor so that we're left referring - * to the right node, after we're done. - * If this leaves the ptr value 0 our caller will fix it up. - */ - if (level > 0) - cur->bc_ptrs[level]--; - /* - * Return value means the next level up has something to do. - */ - *stat = 2; - return 0; - -error0: - xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); - return error; -} - -/* - * Log header fields from a btree block. - */ -STATIC void -xfs_alloc_log_block( - xfs_trans_t *tp, /* transaction pointer */ - xfs_buf_t *bp, /* buffer containing btree block */ - int fields) /* mask of fields: XFS_BB_... */ -{ - int first; /* first byte offset logged */ - int last; /* last byte offset logged */ - static const short offsets[] = { /* table of offsets */ - offsetof(xfs_alloc_block_t, bb_magic), - offsetof(xfs_alloc_block_t, bb_level), - offsetof(xfs_alloc_block_t, bb_numrecs), - offsetof(xfs_alloc_block_t, bb_leftsib), - offsetof(xfs_alloc_block_t, bb_rightsib), - sizeof(xfs_alloc_block_t) - }; - - xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first, &last); - xfs_trans_log_buf(tp, bp, first, last); -} - -/* - * Log keys from a btree block (nonleaf). - */ -STATIC void -xfs_alloc_log_keys( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_buf_t *bp, /* buffer containing btree block */ - int kfirst, /* index of first key to log */ - int klast) /* index of last key to log */ -{ - xfs_alloc_block_t *block; /* btree block to log from */ - int first; /* first byte offset logged */ - xfs_alloc_key_t *kp; /* key pointer in btree block */ - int last; /* last byte offset logged */ - - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - kp = XFS_ALLOC_KEY_ADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(cur->bc_tp, bp, first, last); -} - -/* - * Log block pointer fields from a btree block (nonleaf). - */ -STATIC void -xfs_alloc_log_ptrs( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_buf_t *bp, /* buffer containing btree block */ - int pfirst, /* index of first pointer to log */ - int plast) /* index of last pointer to log */ -{ - xfs_alloc_block_t *block; /* btree block to log from */ - int first; /* first byte offset logged */ - int last; /* last byte offset logged */ - xfs_alloc_ptr_t *pp; /* block-pointer pointer in btree blk */ - - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - pp = XFS_ALLOC_PTR_ADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(cur->bc_tp, bp, first, last); -} - -/* - * Log records from a btree block (leaf). - */ -STATIC void -xfs_alloc_log_recs( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_buf_t *bp, /* buffer containing btree block */ - int rfirst, /* index of first record to log */ - int rlast) /* index of last record to log */ -{ - xfs_alloc_block_t *block; /* btree block to log from */ - int first; /* first byte offset logged */ - int last; /* last byte offset logged */ - xfs_alloc_rec_t *rp; /* record pointer for btree block */ - - - block = XFS_BUF_TO_ALLOC_BLOCK(bp); - rp = XFS_ALLOC_REC_ADDR(block, 1, cur); -#ifdef DEBUG - { - xfs_agf_t *agf; - xfs_alloc_rec_t *p; - - agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); - for (p = &rp[rfirst - 1]; p <= &rp[rlast - 1]; p++) - ASSERT(be32_to_cpu(p->ar_startblock) + - be32_to_cpu(p->ar_blockcount) <= - be32_to_cpu(agf->agf_length)); - } -#endif - first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(cur->bc_tp, bp, first, last); -} - - -/* - * Externally visible routines. - */ - -/* - * Delete the record pointed to by cur. - * The cursor refers to the place where the record was (could be inserted) - * when the operation returns. - */ -int /* error */ -xfs_alloc_delete( - xfs_btree_cur_t *cur, /* btree cursor */ - int *stat) /* success/failure */ -{ - int error; /* error return value */ - int i; /* result code */ - int level; /* btree level */ - - /* - * Go up the tree, starting at leaf level. - * If 2 is returned then a join was done; go to the next level. - * Otherwise we are done. - */ - for (level = 0, i = 2; i == 2; level++) { - if ((error = xfs_alloc_delrec(cur, level, &i))) - return error; - } - if (i == 0) { - for (level = 1; level < cur->bc_nlevels; level++) { - if (cur->bc_ptrs[level] == 0) { - if ((error = xfs_btree_decrement(cur, level, &i))) - return error; - break; - } - } - } - *stat = i; - return 0; -} /* * Get the data from the pointed-to record. @@ -879,6 +194,7 @@ xfs_allocbt_update_lastrec( struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno); __be32 len; + int numrecs; ASSERT(cur->bc_btnum == XFS_BTNUM_CNT); @@ -897,6 +213,22 @@ xfs_allocbt_update_lastrec( be32_to_cpu(agf->agf_longest)) return; len = rec->alloc.ar_blockcount; + break; + case LASTREC_DELREC: + numrecs = xfs_btree_get_numrecs(block); + if (ptr <= numrecs) + return; + ASSERT(ptr == numrecs + 1); + + if (numrecs) { + xfs_alloc_rec_t *rrp; + + rrp = XFS_ALLOC_REC_ADDR(block, numrecs, cur); + len = rrp->ar_blockcount; + } else { + len = 0; + } + break; default: ASSERT(0); @@ -908,6 +240,14 @@ xfs_allocbt_update_lastrec( xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, XFS_AGF_LONGEST); } +STATIC int +xfs_allocbt_get_minrecs( + struct xfs_btree_cur *cur, + int level) +{ + return cur->bc_mp->m_alloc_mnr[level != 0]; +} + STATIC int xfs_allocbt_get_maxrecs( struct xfs_btree_cur *cur, @@ -983,6 +323,38 @@ xfs_allocbt_key_diff( return (__int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock; } +STATIC int +xfs_allocbt_kill_root( + struct xfs_btree_cur *cur, + struct xfs_buf *bp, + int level, + union xfs_btree_ptr *newroot) +{ + int error; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_STATS_INC(cur, killroot); + + /* + * Update the root pointer, decreasing the level by 1 and then + * free the old root. + */ + xfs_allocbt_set_root(cur, newroot, -1); + error = xfs_allocbt_free_block(cur, bp); + if (error) { + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; + } + + XFS_BTREE_STATS_INC(cur, free); + + xfs_btree_setbuf(cur, level, NULL); + cur->bc_nlevels--; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + return 0; +} + #ifdef XFS_BTREE_TRACE ktrace_t *xfs_allocbt_trace_buf; @@ -1055,9 +427,11 @@ static const struct xfs_btree_ops xfs_allocbt_ops = { .dup_cursor = xfs_allocbt_dup_cursor, .set_root = xfs_allocbt_set_root, + .kill_root = xfs_allocbt_kill_root, .alloc_block = xfs_allocbt_alloc_block, .free_block = xfs_allocbt_free_block, .update_lastrec = xfs_allocbt_update_lastrec, + .get_minrecs = xfs_allocbt_get_minrecs, .get_maxrecs = xfs_allocbt_get_maxrecs, .init_key_from_rec = xfs_allocbt_init_key_from_rec, .init_rec_from_key = xfs_allocbt_init_rec_from_key, diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 2e340ef8025..8d2e3ec21fd 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -94,13 +94,6 @@ typedef struct xfs_btree_sblock xfs_alloc_block_t; #define XFS_ALLOC_PTR_ADDR(bb,i,cur) \ XFS_BTREE_PTR_ADDR(xfs_alloc, bb, i, XFS_ALLOC_BLOCK_MAXRECS(1, cur)) -/* - * Delete the record pointed to by cur. - * The cursor refers to the place where the record was (could be inserted) - * when the operation returns. - */ -extern int xfs_alloc_delete(struct xfs_btree_cur *cur, int *stat); - /* * Get the data from the pointed-to record. */ diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 85e2e8b9cf4..74761ca2c63 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -864,7 +864,7 @@ xfs_bmap_add_extent_delay_real( RIGHT.br_blockcount, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_btree_decrement(cur, 0, &i))) @@ -1425,13 +1425,13 @@ xfs_bmap_add_extent_unwritten_real( RIGHT.br_blockcount, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_btree_decrement(cur, 0, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_btree_decrement(cur, 0, &i))) @@ -1474,7 +1474,7 @@ xfs_bmap_add_extent_unwritten_real( &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_btree_decrement(cur, 0, &i))) @@ -1517,7 +1517,7 @@ xfs_bmap_add_extent_unwritten_real( RIGHT.br_blockcount, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_btree_decrement(cur, 0, &i))) @@ -2152,7 +2152,7 @@ xfs_bmap_add_extent_hole_real( right.br_blockcount, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); if ((error = xfs_btree_decrement(cur, 0, &i))) @@ -3216,7 +3216,7 @@ xfs_bmap_del_extent( flags |= XFS_ILOG_FEXT(whichfork); break; } - if ((error = xfs_bmbt_delete(cur, &i))) + if ((error = xfs_btree_delete(cur, &i))) goto done; XFS_WANT_CORRUPTED_GOTO(i == 1, done); break; diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 6b7774ebc26..5b8030561d7 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -44,14 +44,6 @@ #include "xfs_error.h" #include "xfs_quota.h" -/* - * Prototypes for internal btree functions. - */ - - -STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int); -STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int); - #undef EXIT #define ENTRY XBT_ENTRY @@ -80,453 +72,6 @@ STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int); #define XFS_BMBT_TRACE_CURSOR(c,s) \ XFS_BTREE_TRACE_CURSOR(c,s) - -/* - * Internal functions. - */ - -/* - * Delete record pointed to by cur/level. - */ -STATIC int /* error */ -xfs_bmbt_delrec( - xfs_btree_cur_t *cur, - int level, - int *stat) /* success/failure */ -{ - xfs_bmbt_block_t *block; /* bmap btree block */ - xfs_fsblock_t bno; /* fs-relative block number */ - xfs_buf_t *bp; /* buffer for block */ - int error; /* error return value */ - int i; /* loop counter */ - int j; /* temp state */ - xfs_bmbt_key_t key; /* bmap btree key */ - xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */ - xfs_fsblock_t lbno; /* left sibling block number */ - xfs_buf_t *lbp; /* left buffer pointer */ - xfs_bmbt_block_t *left; /* left btree block */ - xfs_bmbt_key_t *lkp; /* left btree key */ - xfs_bmbt_ptr_t *lpp; /* left address pointer */ - int lrecs=0; /* left record count */ - xfs_bmbt_rec_t *lrp; /* left record pointer */ - xfs_mount_t *mp; /* file system mount point */ - xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */ - int ptr; /* key/record index */ - xfs_fsblock_t rbno; /* right sibling block number */ - xfs_buf_t *rbp; /* right buffer pointer */ - xfs_bmbt_block_t *right; /* right btree block */ - xfs_bmbt_key_t *rkp; /* right btree key */ - xfs_bmbt_rec_t *rp; /* pointer to bmap btree rec */ - xfs_bmbt_ptr_t *rpp; /* right address pointer */ - xfs_bmbt_block_t *rrblock; /* right-right btree block */ - xfs_buf_t *rrbp; /* right-right buffer pointer */ - int rrecs=0; /* right record count */ - xfs_bmbt_rec_t *rrp; /* right record pointer */ - xfs_btree_cur_t *tcur; /* temporary btree cursor */ - int numrecs; /* temporary numrec count */ - int numlrecs, numrrecs; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGI(cur, level); - ptr = cur->bc_ptrs[level]; - tcur = NULL; - if (ptr == 0) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - block = xfs_bmbt_get_block(cur, level, &bp); - numrecs = be16_to_cpu(block->bb_numrecs); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, block, level, bp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } -#endif - if (ptr > numrecs) { - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 0; - return 0; - } - XFS_STATS_INC(xs_bmbt_delrec); - if (level > 0) { - kp = XFS_BMAP_KEY_IADDR(block, 1, cur); - pp = XFS_BMAP_PTR_IADDR(block, 1, cur); -#ifdef DEBUG - for (i = ptr; i < numrecs; i++) { - if ((error = xfs_btree_check_lptr_disk(cur, pp[i], level))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - } -#endif - if (ptr < numrecs) { - memmove(&kp[ptr - 1], &kp[ptr], - (numrecs - ptr) * sizeof(*kp)); - memmove(&pp[ptr - 1], &pp[ptr], - (numrecs - ptr) * sizeof(*pp)); - xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1); - xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1); - } - } else { - rp = XFS_BMAP_REC_IADDR(block, 1, cur); - if (ptr < numrecs) { - memmove(&rp[ptr - 1], &rp[ptr], - (numrecs - ptr) * sizeof(*rp)); - xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1); - } - if (ptr == 1) { - key.br_startoff = - cpu_to_be64(xfs_bmbt_disk_get_startoff(rp)); - kp = &key; - } - } - numrecs--; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS); - /* - * We're at the root level. - * First, shrink the root block in-memory. - * Try to get rid of the next level down. - * If we can't then there's nothing left to do. - */ - if (level == cur->bc_nlevels - 1) { - xfs_iroot_realloc(cur->bc_private.b.ip, -1, - cur->bc_private.b.whichfork); - if ((error = xfs_btree_kill_iroot(cur))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - if (level > 0 && (error = xfs_btree_decrement(cur, level, &j))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - if (ptr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)kp, level + 1))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) { - if (level > 0 && (error = xfs_btree_decrement(cur, level, &j))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - rbno = be64_to_cpu(block->bb_rightsib); - lbno = be64_to_cpu(block->bb_leftsib); - /* - * One child of root, need to get a chance to copy its contents - * into the root and delete it. Can't go up to next level, - * there's nothing to delete there. - */ - if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK && - level == cur->bc_nlevels - 2) { - if ((error = xfs_btree_kill_iroot(cur))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK); - if ((error = xfs_btree_dup_cursor(cur, &tcur))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - bno = NULLFSBLOCK; - if (rbno != NULLFSBLOCK) { - i = xfs_btree_lastrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_btree_increment(tcur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - i = xfs_btree_lastrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - rbp = tcur->bc_bufs[level]; - right = XFS_BUF_TO_BMBT_BLOCK(rbp); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } -#endif - bno = be64_to_cpu(right->bb_leftsib); - if (be16_to_cpu(right->bb_numrecs) - 1 >= - XFS_BMAP_BLOCK_IMINRECS(level, cur)) { - if ((error = xfs_btree_lshift(tcur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - if (i) { - ASSERT(be16_to_cpu(block->bb_numrecs) >= - XFS_BMAP_BLOCK_IMINRECS(level, tcur)); - xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); - tcur = NULL; - if (level > 0) { - if ((error = xfs_btree_decrement(cur, - level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, - ERROR); - goto error0; - } - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - } - rrecs = be16_to_cpu(right->bb_numrecs); - if (lbno != NULLFSBLOCK) { - i = xfs_btree_firstrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_btree_decrement(tcur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - } - } - if (lbno != NULLFSBLOCK) { - i = xfs_btree_firstrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - /* - * decrement to last in block - */ - if ((error = xfs_btree_decrement(tcur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - i = xfs_btree_firstrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - lbp = tcur->bc_bufs[level]; - left = XFS_BUF_TO_BMBT_BLOCK(lbp); -#ifdef DEBUG - if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } -#endif - bno = be64_to_cpu(left->bb_rightsib); - if (be16_to_cpu(left->bb_numrecs) - 1 >= - XFS_BMAP_BLOCK_IMINRECS(level, cur)) { - if ((error = xfs_btree_rshift(tcur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - if (i) { - ASSERT(be16_to_cpu(block->bb_numrecs) >= - XFS_BMAP_BLOCK_IMINRECS(level, tcur)); - xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); - tcur = NULL; - if (level == 0) - cur->bc_ptrs[0]++; - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - } - lrecs = be16_to_cpu(left->bb_numrecs); - } - xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); - tcur = NULL; - mp = cur->bc_mp; - ASSERT(bno != NULLFSBLOCK); - if (lbno != NULLFSBLOCK && - lrecs + be16_to_cpu(block->bb_numrecs) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) { - rbno = bno; - right = block; - rbp = bp; - if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp, - XFS_BMAP_BTREE_REF))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - left = XFS_BUF_TO_BMBT_BLOCK(lbp); - if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - } else if (rbno != NULLFSBLOCK && - rrecs + be16_to_cpu(block->bb_numrecs) <= - XFS_BMAP_BLOCK_IMAXRECS(level, cur)) { - lbno = bno; - left = block; - lbp = bp; - if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp, - XFS_BMAP_BTREE_REF))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - right = XFS_BUF_TO_BMBT_BLOCK(rbp); - if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - lrecs = be16_to_cpu(left->bb_numrecs); - } else { - if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 1; - return 0; - } - numlrecs = be16_to_cpu(left->bb_numrecs); - numrrecs = be16_to_cpu(right->bb_numrecs); - if (level > 0) { - lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur); - lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur); - rkp = XFS_BMAP_KEY_IADDR(right, 1, cur); - rpp = XFS_BMAP_PTR_IADDR(right, 1, cur); -#ifdef DEBUG - for (i = 0; i < numrrecs; i++) { - if ((error = xfs_btree_check_lptr_disk(cur, rpp[i], level))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - } -#endif - memcpy(lkp, rkp, numrrecs * sizeof(*lkp)); - memcpy(lpp, rpp, numrrecs * sizeof(*lpp)); - xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs); - xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs); - } else { - lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur); - rrp = XFS_BMAP_REC_IADDR(right, 1, cur); - memcpy(lrp, rrp, numrrecs * sizeof(*lrp)); - xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs); - } - be16_add_cpu(&left->bb_numrecs, numrrecs); - left->bb_rightsib = right->bb_rightsib; - xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS); - if (be64_to_cpu(left->bb_rightsib) != NULLDFSBNO) { - if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, - be64_to_cpu(left->bb_rightsib), - 0, &rrbp, XFS_BMAP_BTREE_REF))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp); - if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - rrblock->bb_leftsib = cpu_to_be64(lbno); - xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB); - } - xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1, - cur->bc_private.b.flist, mp); - cur->bc_private.b.ip->i_d.di_nblocks--; - xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE); - XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip, - XFS_TRANS_DQ_BCOUNT, -1L); - xfs_trans_binval(cur->bc_tp, rbp); - if (bp != lbp) { - cur->bc_bufs[level] = lbp; - cur->bc_ptrs[level] += lrecs; - cur->bc_ra[level] = 0; - } else if ((error = xfs_btree_increment(cur, level + 1, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - goto error0; - } - if (level > 0) - cur->bc_ptrs[level]--; - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = 2; - return 0; - -error0: - if (tcur) - xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); - return error; -} - -/* - * Log key values from the btree block. - */ -STATIC void -xfs_bmbt_log_keys( - xfs_btree_cur_t *cur, - xfs_buf_t *bp, - int kfirst, - int klast) -{ - xfs_trans_t *tp; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast); - tp = cur->bc_tp; - if (bp) { - xfs_bmbt_block_t *block; - int first; - xfs_bmbt_key_t *kp; - int last; - - block = XFS_BUF_TO_BMBT_BLOCK(bp); - kp = XFS_BMAP_KEY_DADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(tp, bp, first, last); - } else { - xfs_inode_t *ip; - - ip = cur->bc_private.b.ip; - xfs_trans_log_inode(tp, ip, - XFS_ILOG_FBROOT(cur->bc_private.b.whichfork)); - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); -} - -/* - * Log pointer values from the btree block. - */ -STATIC void -xfs_bmbt_log_ptrs( - xfs_btree_cur_t *cur, - xfs_buf_t *bp, - int pfirst, - int plast) -{ - xfs_trans_t *tp; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast); - tp = cur->bc_tp; - if (bp) { - xfs_bmbt_block_t *block; - int first; - int last; - xfs_bmbt_ptr_t *pp; - - block = XFS_BUF_TO_BMBT_BLOCK(bp); - pp = XFS_BMAP_PTR_DADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(tp, bp, first, last); - } else { - xfs_inode_t *ip; - - ip = cur->bc_private.b.ip; - xfs_trans_log_inode(tp, ip, - XFS_ILOG_FBROOT(cur->bc_private.b.whichfork)); - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); -} - /* * Determine the extent state. */ @@ -575,42 +120,6 @@ xfs_bmdr_to_bmbt( memcpy(tpp, fpp, sizeof(*fpp) * dmxr); } -/* - * Delete the record pointed to by cur. - */ -int /* error */ -xfs_bmbt_delete( - xfs_btree_cur_t *cur, - int *stat) /* success/failure */ -{ - int error; /* error return value */ - int i; - int level; - - XFS_BMBT_TRACE_CURSOR(cur, ENTRY); - for (level = 0, i = 2; i == 2; level++) { - if ((error = xfs_bmbt_delrec(cur, level, &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - } - if (i == 0) { - for (level = 1; level < cur->bc_nlevels; level++) { - if (cur->bc_ptrs[level] == 0) { - if ((error = xfs_btree_decrement(cur, level, - &i))) { - XFS_BMBT_TRACE_CURSOR(cur, ERROR); - return error; - } - break; - } - } - } - XFS_BMBT_TRACE_CURSOR(cur, EXIT); - *stat = i; - return 0; -} - /* * Convert a compressed bmap extent record to an uncompressed form. * This code must be in sync with the routines xfs_bmbt_get_startoff, @@ -664,31 +173,6 @@ xfs_bmbt_get_all( __xfs_bmbt_get_all(r->l0, r->l1, s); } -/* - * Get the block pointer for the given level of the cursor. - * Fill in the buffer pointer, if applicable. - */ -xfs_bmbt_block_t * -xfs_bmbt_get_block( - xfs_btree_cur_t *cur, - int level, - xfs_buf_t **bpp) -{ - xfs_ifork_t *ifp; - xfs_bmbt_block_t *rval; - - if (level < cur->bc_nlevels - 1) { - *bpp = cur->bc_bufs[level]; - rval = XFS_BUF_TO_BMBT_BLOCK(*bpp); - } else { - *bpp = NULL; - ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, - cur->bc_private.b.whichfork); - rval = ifp->if_broot; - } - return rval; -} - /* * Extract the blockcount field from an in memory bmap extent record. */ @@ -1225,6 +709,14 @@ xfs_bmbt_free_block( return 0; } +STATIC int +xfs_bmbt_get_minrecs( + struct xfs_btree_cur *cur, + int level) +{ + return XFS_BMAP_BLOCK_IMINRECS(level, cur); +} + STATIC int xfs_bmbt_get_maxrecs( struct xfs_btree_cur *cur, @@ -1389,6 +881,7 @@ static const struct xfs_btree_ops xfs_bmbt_ops = { .alloc_block = xfs_bmbt_alloc_block, .free_block = xfs_bmbt_free_block, .get_maxrecs = xfs_bmbt_get_maxrecs, + .get_minrecs = xfs_bmbt_get_minrecs, .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, .init_key_from_rec = xfs_bmbt_init_key_from_rec, .init_rec_from_key = xfs_bmbt_init_rec_from_key, diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index 703fe2e3434..952ab395f79 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -237,10 +237,7 @@ typedef struct xfs_btree_lblock xfs_bmbt_block_t; * Prototypes for xfs_bmap.c to call. */ extern void xfs_bmdr_to_bmbt(xfs_bmdr_block_t *, int, xfs_bmbt_block_t *, int); -extern int xfs_bmbt_delete(struct xfs_btree_cur *, int *); extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); -extern xfs_bmbt_block_t *xfs_bmbt_get_block(struct xfs_btree_cur *cur, - int, struct xfs_buf **bpp); extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r); extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r); extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r); diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 75a8a7b00df..28cc7681834 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -3171,3 +3171,596 @@ out0: XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); return 0; } + +STATIC int +xfs_btree_dec_cursor( + struct xfs_btree_cur *cur, + int level, + int *stat) +{ + int error; + int i; + + if (level > 0) { + error = xfs_btree_decrement(cur, level, &i); + if (error) + return error; + } + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 1; + return 0; +} + +/* + * Single level of the btree record deletion routine. + * Delete record pointed to by cur/level. + * Remove the record from its block then rebalance the tree. + * Return 0 for error, 1 for done, 2 to go on to the next level. + */ +STATIC int /* error */ +xfs_btree_delrec( + struct xfs_btree_cur *cur, /* btree cursor */ + int level, /* level removing record from */ + int *stat) /* fail/done/go-on */ +{ + struct xfs_btree_block *block; /* btree block */ + union xfs_btree_ptr cptr; /* current block ptr */ + struct xfs_buf *bp; /* buffer for block */ + int error; /* error return value */ + int i; /* loop counter */ + union xfs_btree_key key; /* storage for keyp */ + union xfs_btree_key *keyp = &key; /* passed to the next level */ + union xfs_btree_ptr lptr; /* left sibling block ptr */ + struct xfs_buf *lbp; /* left buffer pointer */ + struct xfs_btree_block *left; /* left btree block */ + int lrecs = 0; /* left record count */ + int ptr; /* key/record index */ + union xfs_btree_ptr rptr; /* right sibling block ptr */ + struct xfs_buf *rbp; /* right buffer pointer */ + struct xfs_btree_block *right; /* right btree block */ + struct xfs_btree_block *rrblock; /* right-right btree block */ + struct xfs_buf *rrbp; /* right-right buffer pointer */ + int rrecs = 0; /* right record count */ + struct xfs_btree_cur *tcur; /* temporary btree cursor */ + int numrecs; /* temporary numrec count */ + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_TRACE_ARGI(cur, level); + + tcur = NULL; + + /* Get the index of the entry being deleted, check for nothing there. */ + ptr = cur->bc_ptrs[level]; + if (ptr == 0) { + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 0; + return 0; + } + + /* Get the buffer & block containing the record or key/ptr. */ + block = xfs_btree_get_block(cur, level, &bp); + numrecs = xfs_btree_get_numrecs(block); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, level, bp); + if (error) + goto error0; +#endif + + /* Fail if we're off the end of the block. */ + if (ptr > numrecs) { + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 0; + return 0; + } + + XFS_BTREE_STATS_INC(cur, delrec); + XFS_BTREE_STATS_ADD(cur, moves, numrecs - ptr); + + /* Excise the entries being deleted. */ + if (level > 0) { + /* It's a nonleaf. operate on keys and ptrs */ + union xfs_btree_key *lkp; + union xfs_btree_ptr *lpp; + + lkp = xfs_btree_key_addr(cur, ptr + 1, block); + lpp = xfs_btree_ptr_addr(cur, ptr + 1, block); + +#ifdef DEBUG + for (i = 0; i < numrecs - ptr; i++) { + error = xfs_btree_check_ptr(cur, lpp, i, level); + if (error) + goto error0; + } +#endif + + if (ptr < numrecs) { + xfs_btree_shift_keys(cur, lkp, -1, numrecs - ptr); + xfs_btree_shift_ptrs(cur, lpp, -1, numrecs - ptr); + xfs_btree_log_keys(cur, bp, ptr, numrecs - 1); + xfs_btree_log_ptrs(cur, bp, ptr, numrecs - 1); + } + + /* + * If it's the first record in the block, we'll need to pass a + * key up to the next level (updkey). + */ + if (ptr == 1) + keyp = xfs_btree_key_addr(cur, 1, block); + } else { + /* It's a leaf. operate on records */ + if (ptr < numrecs) { + xfs_btree_shift_recs(cur, + xfs_btree_rec_addr(cur, ptr + 1, block), + -1, numrecs - ptr); + xfs_btree_log_recs(cur, bp, ptr, numrecs - 1); + } + + /* + * If it's the first record in the block, we'll need a key + * structure to pass up to the next level (updkey). + */ + if (ptr == 1) { + cur->bc_ops->init_key_from_rec(&key, + xfs_btree_rec_addr(cur, 1, block)); + keyp = &key; + } + } + + /* + * Decrement and log the number of entries in the block. + */ + xfs_btree_set_numrecs(block, --numrecs); + xfs_btree_log_block(cur, bp, XFS_BB_NUMRECS); + + /* + * If we are tracking the last record in the tree and + * we are at the far right edge of the tree, update it. + */ + if (xfs_btree_is_lastrec(cur, block, level)) { + cur->bc_ops->update_lastrec(cur, block, NULL, + ptr, LASTREC_DELREC); + } + + /* + * We're at the root level. First, shrink the root block in-memory. + * Try to get rid of the next level down. If we can't then there's + * nothing left to do. + */ + if (level == cur->bc_nlevels - 1) { + if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) { + xfs_iroot_realloc(cur->bc_private.b.ip, -1, + cur->bc_private.b.whichfork); + + error = xfs_btree_kill_iroot(cur); + if (error) + goto error0; + + error = xfs_btree_dec_cursor(cur, level, stat); + if (error) + goto error0; + *stat = 1; + return 0; + } + + /* + * If this is the root level, and there's only one entry left, + * and it's NOT the leaf level, then we can get rid of this + * level. + */ + if (numrecs == 1 && level > 0) { + union xfs_btree_ptr *pp; + /* + * pp is still set to the first pointer in the block. + * Make it the new root of the btree. + */ + pp = xfs_btree_ptr_addr(cur, 1, block); + error = cur->bc_ops->kill_root(cur, bp, level, pp); + if (error) + goto error0; + } else if (level > 0) { + error = xfs_btree_dec_cursor(cur, level, stat); + if (error) + goto error0; + } + *stat = 1; + return 0; + } + + /* + * If we deleted the leftmost entry in the block, update the + * key values above us in the tree. + */ + if (ptr == 1) { + error = xfs_btree_updkey(cur, keyp, level + 1); + if (error) + goto error0; + } + + /* + * If the number of records remaining in the block is at least + * the minimum, we're done. + */ + if (numrecs >= cur->bc_ops->get_minrecs(cur, level)) { + error = xfs_btree_dec_cursor(cur, level, stat); + if (error) + goto error0; + return 0; + } + + /* + * Otherwise, we have to move some records around to keep the + * tree balanced. Look at the left and right sibling blocks to + * see if we can re-balance by moving only one record. + */ + xfs_btree_get_sibling(cur, block, &rptr, XFS_BB_RIGHTSIB); + xfs_btree_get_sibling(cur, block, &lptr, XFS_BB_LEFTSIB); + + if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) { + /* + * One child of root, need to get a chance to copy its contents + * into the root and delete it. Can't go up to next level, + * there's nothing to delete there. + */ + if (xfs_btree_ptr_is_null(cur, &rptr) && + xfs_btree_ptr_is_null(cur, &lptr) && + level == cur->bc_nlevels - 2) { + error = xfs_btree_kill_iroot(cur); + if (!error) + error = xfs_btree_dec_cursor(cur, level, stat); + if (error) + goto error0; + return 0; + } + } + + ASSERT(!xfs_btree_ptr_is_null(cur, &rptr) || + !xfs_btree_ptr_is_null(cur, &lptr)); + + /* + * Duplicate the cursor so our btree manipulations here won't + * disrupt the next level up. + */ + error = xfs_btree_dup_cursor(cur, &tcur); + if (error) + goto error0; + + /* + * If there's a right sibling, see if it's ok to shift an entry + * out of it. + */ + if (!xfs_btree_ptr_is_null(cur, &rptr)) { + /* + * Move the temp cursor to the last entry in the next block. + * Actually any entry but the first would suffice. + */ + i = xfs_btree_lastrec(tcur, level); + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + + error = xfs_btree_increment(tcur, level, &i); + if (error) + goto error0; + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + + i = xfs_btree_lastrec(tcur, level); + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + + /* Grab a pointer to the block. */ + right = xfs_btree_get_block(tcur, level, &rbp); +#ifdef DEBUG + error = xfs_btree_check_block(tcur, right, level, rbp); + if (error) + goto error0; +#endif + /* Grab the current block number, for future use. */ + xfs_btree_get_sibling(tcur, right, &cptr, XFS_BB_LEFTSIB); + + /* + * If right block is full enough so that removing one entry + * won't make it too empty, and left-shifting an entry out + * of right to us works, we're done. + */ + if (xfs_btree_get_numrecs(right) - 1 >= + cur->bc_ops->get_minrecs(tcur, level)) { + error = xfs_btree_lshift(tcur, level, &i); + if (error) + goto error0; + if (i) { + ASSERT(xfs_btree_get_numrecs(block) >= + cur->bc_ops->get_minrecs(tcur, level)); + + xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); + tcur = NULL; + + error = xfs_btree_dec_cursor(cur, level, stat); + if (error) + goto error0; + return 0; + } + } + + /* + * Otherwise, grab the number of records in right for + * future reference, and fix up the temp cursor to point + * to our block again (last record). + */ + rrecs = xfs_btree_get_numrecs(right); + if (!xfs_btree_ptr_is_null(cur, &lptr)) { + i = xfs_btree_firstrec(tcur, level); + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + + error = xfs_btree_decrement(tcur, level, &i); + if (error) + goto error0; + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + } + } + + /* + * If there's a left sibling, see if it's ok to shift an entry + * out of it. + */ + if (!xfs_btree_ptr_is_null(cur, &lptr)) { + /* + * Move the temp cursor to the first entry in the + * previous block. + */ + i = xfs_btree_firstrec(tcur, level); + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + + error = xfs_btree_decrement(tcur, level, &i); + if (error) + goto error0; + i = xfs_btree_firstrec(tcur, level); + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + + /* Grab a pointer to the block. */ + left = xfs_btree_get_block(tcur, level, &lbp); +#ifdef DEBUG + error = xfs_btree_check_block(cur, left, level, lbp); + if (error) + goto error0; +#endif + /* Grab the current block number, for future use. */ + xfs_btree_get_sibling(tcur, left, &cptr, XFS_BB_RIGHTSIB); + + /* + * If left block is full enough so that removing one entry + * won't make it too empty, and right-shifting an entry out + * of left to us works, we're done. + */ + if (xfs_btree_get_numrecs(left) - 1 >= + cur->bc_ops->get_minrecs(tcur, level)) { + error = xfs_btree_rshift(tcur, level, &i); + if (error) + goto error0; + if (i) { + ASSERT(xfs_btree_get_numrecs(block) >= + cur->bc_ops->get_minrecs(tcur, level)); + xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); + tcur = NULL; + if (level == 0) + cur->bc_ptrs[0]++; + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = 1; + return 0; + } + } + + /* + * Otherwise, grab the number of records in right for + * future reference. + */ + lrecs = xfs_btree_get_numrecs(left); + } + + /* Delete the temp cursor, we're done with it. */ + xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); + tcur = NULL; + + /* If here, we need to do a join to keep the tree balanced. */ + ASSERT(!xfs_btree_ptr_is_null(cur, &cptr)); + + if (!xfs_btree_ptr_is_null(cur, &lptr) && + lrecs + xfs_btree_get_numrecs(block) <= + cur->bc_ops->get_maxrecs(cur, level)) { + /* + * Set "right" to be the starting block, + * "left" to be the left neighbor. + */ + rptr = cptr; + right = block; + rbp = bp; + error = xfs_btree_read_buf_block(cur, &lptr, level, + 0, &left, &lbp); + if (error) + goto error0; + + /* + * If that won't work, see if we can join with the right neighbor block. + */ + } else if (!xfs_btree_ptr_is_null(cur, &rptr) && + rrecs + xfs_btree_get_numrecs(block) <= + cur->bc_ops->get_maxrecs(cur, level)) { + /* + * Set "left" to be the starting block, + * "right" to be the right neighbor. + */ + lptr = cptr; + left = block; + lbp = bp; + error = xfs_btree_read_buf_block(cur, &rptr, level, + 0, &right, &rbp); + if (error) + goto error0; + + /* + * Otherwise, we can't fix the imbalance. + * Just return. This is probably a logic error, but it's not fatal. + */ + } else { + error = xfs_btree_dec_cursor(cur, level, stat); + if (error) + goto error0; + return 0; + } + + rrecs = xfs_btree_get_numrecs(right); + lrecs = xfs_btree_get_numrecs(left); + + /* + * We're now going to join "left" and "right" by moving all the stuff + * in "right" to "left" and deleting "right". + */ + XFS_BTREE_STATS_ADD(cur, moves, rrecs); + if (level > 0) { + /* It's a non-leaf. Move keys and pointers. */ + union xfs_btree_key *lkp; /* left btree key */ + union xfs_btree_ptr *lpp; /* left address pointer */ + union xfs_btree_key *rkp; /* right btree key */ + union xfs_btree_ptr *rpp; /* right address pointer */ + + lkp = xfs_btree_key_addr(cur, lrecs + 1, left); + lpp = xfs_btree_ptr_addr(cur, lrecs + 1, left); + rkp = xfs_btree_key_addr(cur, 1, right); + rpp = xfs_btree_ptr_addr(cur, 1, right); +#ifdef DEBUG + for (i = 1; i < rrecs; i++) { + error = xfs_btree_check_ptr(cur, rpp, i, level); + if (error) + goto error0; + } +#endif + xfs_btree_copy_keys(cur, lkp, rkp, rrecs); + xfs_btree_copy_ptrs(cur, lpp, rpp, rrecs); + + xfs_btree_log_keys(cur, lbp, lrecs + 1, lrecs + rrecs); + xfs_btree_log_ptrs(cur, lbp, lrecs + 1, lrecs + rrecs); + } else { + /* It's a leaf. Move records. */ + union xfs_btree_rec *lrp; /* left record pointer */ + union xfs_btree_rec *rrp; /* right record pointer */ + + lrp = xfs_btree_rec_addr(cur, lrecs + 1, left); + rrp = xfs_btree_rec_addr(cur, 1, right); + + xfs_btree_copy_recs(cur, lrp, rrp, rrecs); + xfs_btree_log_recs(cur, lbp, lrecs + 1, lrecs + rrecs); + } + + XFS_BTREE_STATS_INC(cur, join); + + /* + * Fix up the the number of records and right block pointer in the + * surviving block, and log it. + */ + xfs_btree_set_numrecs(left, lrecs + rrecs); + xfs_btree_get_sibling(cur, right, &cptr, XFS_BB_RIGHTSIB), + xfs_btree_set_sibling(cur, left, &cptr, XFS_BB_RIGHTSIB); + xfs_btree_log_block(cur, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB); + + /* If there is a right sibling, point it to the remaining block. */ + xfs_btree_get_sibling(cur, left, &cptr, XFS_BB_RIGHTSIB); + if (!xfs_btree_ptr_is_null(cur, &cptr)) { + error = xfs_btree_read_buf_block(cur, &cptr, level, + 0, &rrblock, &rrbp); + if (error) + goto error0; + xfs_btree_set_sibling(cur, rrblock, &lptr, XFS_BB_LEFTSIB); + xfs_btree_log_block(cur, rrbp, XFS_BB_LEFTSIB); + } + + /* Free the deleted block. */ + error = cur->bc_ops->free_block(cur, rbp); + if (error) + goto error0; + XFS_BTREE_STATS_INC(cur, free); + + /* + * If we joined with the left neighbor, set the buffer in the + * cursor to the left block, and fix up the index. + */ + if (bp != lbp) { + cur->bc_bufs[level] = lbp; + cur->bc_ptrs[level] += lrecs; + cur->bc_ra[level] = 0; + } + /* + * If we joined with the right neighbor and there's a level above + * us, increment the cursor at that level. + */ + else if ((cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) || + (level + 1 < cur->bc_nlevels)) { + error = xfs_btree_increment(cur, level + 1, &i); + if (error) + goto error0; + } + + /* + * Readjust the ptr at this level if it's not a leaf, since it's + * still pointing at the deletion point, which makes the cursor + * inconsistent. If this makes the ptr 0, the caller fixes it up. + * We can't use decrement because it would change the next level up. + */ + if (level > 0) + cur->bc_ptrs[level]--; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + /* Return value means the next level up has something to do. */ + *stat = 2; + return 0; + +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + if (tcur) + xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); + return error; +} + +/* + * Delete the record pointed to by cur. + * The cursor refers to the place where the record was (could be inserted) + * when the operation returns. + */ +int /* error */ +xfs_btree_delete( + struct xfs_btree_cur *cur, + int *stat) /* success/failure */ +{ + int error; /* error return value */ + int level; + int i; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + + /* + * Go up the tree, starting at leaf level. + * + * If 2 is returned then a join was done; go to the next level. + * Otherwise we are done. + */ + for (level = 0, i = 2; i == 2; level++) { + error = xfs_btree_delrec(cur, level, &i); + if (error) + goto error0; + } + + if (i == 0) { + for (level = 1; level < cur->bc_nlevels; level++) { + if (cur->bc_ptrs[level] == 0) { + error = xfs_btree_decrement(cur, level, &i); + if (error) + goto error0; + break; + } + } + } + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + *stat = i; + return 0; +error0: + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; +} diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index ff2552febba..06ef792e0aa 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -192,6 +192,8 @@ struct xfs_btree_ops { /* update btree root pointer */ void (*set_root)(struct xfs_btree_cur *cur, union xfs_btree_ptr *nptr, int level_change); + int (*kill_root)(struct xfs_btree_cur *cur, struct xfs_buf *bp, + int level, union xfs_btree_ptr *newroot); /* block allocation / freeing */ int (*alloc_block)(struct xfs_btree_cur *cur, @@ -207,6 +209,7 @@ struct xfs_btree_ops { int ptr, int reason); /* records in block/level */ + int (*get_minrecs)(struct xfs_btree_cur *cur, int level); int (*get_maxrecs)(struct xfs_btree_cur *cur, int level); /* records on disk. Matter for the root in inode case. */ @@ -251,6 +254,7 @@ struct xfs_btree_ops { */ #define LASTREC_UPDATE 0 #define LASTREC_INSREC 1 +#define LASTREC_DELREC 2 /* @@ -562,6 +566,7 @@ int xfs_btree_new_root(struct xfs_btree_cur *, int *); int xfs_btree_new_iroot(struct xfs_btree_cur *, int *, int *); int xfs_btree_kill_iroot(struct xfs_btree_cur *); int xfs_btree_insert(struct xfs_btree_cur *, int *); +int xfs_btree_delete(struct xfs_btree_cur *, int *); /* * Helpers. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index b68e73bb17c..f13f59b13cc 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -1168,8 +1168,8 @@ xfs_difree( xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, -ilen); xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -(ilen - 1)); - if ((error = xfs_inobt_delete(cur, &i))) { - cmn_err(CE_WARN, "xfs_difree: xfs_inobt_delete returned an error %d on %s.\n", + if ((error = xfs_btree_delete(cur, &i))) { + cmn_err(CE_WARN, "xfs_difree: xfs_btree_delete returned an error %d on %s.\n", error, mp->m_fsname); goto error0; } diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 90f1d4ee772..6c0a07d1fed 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -40,611 +40,6 @@ #include "xfs_alloc.h" #include "xfs_error.h" -STATIC void xfs_inobt_log_block(xfs_trans_t *, xfs_buf_t *, int); -STATIC void xfs_inobt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int); -STATIC void xfs_inobt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int); -STATIC void xfs_inobt_log_recs(xfs_btree_cur_t *, xfs_buf_t *, int, int); - -/* - * Single level of the xfs_inobt_delete record deletion routine. - * Delete record pointed to by cur/level. - * Remove the record from its block then rebalance the tree. - * Return 0 for error, 1 for done, 2 to go on to the next level. - */ -STATIC int /* error */ -xfs_inobt_delrec( - xfs_btree_cur_t *cur, /* btree cursor */ - int level, /* level removing record from */ - int *stat) /* fail/done/go-on */ -{ - xfs_buf_t *agbp; /* buffer for a.g. inode header */ - xfs_mount_t *mp; /* mount structure */ - xfs_agi_t *agi; /* allocation group inode header */ - xfs_inobt_block_t *block; /* btree block record/key lives in */ - xfs_agblock_t bno; /* btree block number */ - xfs_buf_t *bp; /* buffer for block */ - int error; /* error return value */ - int i; /* loop index */ - xfs_inobt_key_t key; /* kp points here if block is level 0 */ - xfs_inobt_key_t *kp = NULL; /* pointer to btree keys */ - xfs_agblock_t lbno; /* left block's block number */ - xfs_buf_t *lbp; /* left block's buffer pointer */ - xfs_inobt_block_t *left; /* left btree block */ - xfs_inobt_key_t *lkp; /* left block key pointer */ - xfs_inobt_ptr_t *lpp; /* left block address pointer */ - int lrecs = 0; /* number of records in left block */ - xfs_inobt_rec_t *lrp; /* left block record pointer */ - xfs_inobt_ptr_t *pp = NULL; /* pointer to btree addresses */ - int ptr; /* index in btree block for this rec */ - xfs_agblock_t rbno; /* right block's block number */ - xfs_buf_t *rbp; /* right block's buffer pointer */ - xfs_inobt_block_t *right; /* right btree block */ - xfs_inobt_key_t *rkp; /* right block key pointer */ - xfs_inobt_rec_t *rp; /* pointer to btree records */ - xfs_inobt_ptr_t *rpp; /* right block address pointer */ - int rrecs = 0; /* number of records in right block */ - int numrecs; - xfs_inobt_rec_t *rrp; /* right block record pointer */ - xfs_btree_cur_t *tcur; /* temporary btree cursor */ - - mp = cur->bc_mp; - - /* - * Get the index of the entry being deleted, check for nothing there. - */ - ptr = cur->bc_ptrs[level]; - if (ptr == 0) { - *stat = 0; - return 0; - } - - /* - * Get the buffer & block containing the record or key/ptr. - */ - bp = cur->bc_bufs[level]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, level, bp))) - return error; -#endif - /* - * Fail if we're off the end of the block. - */ - - numrecs = be16_to_cpu(block->bb_numrecs); - if (ptr > numrecs) { - *stat = 0; - return 0; - } - /* - * It's a nonleaf. Excise the key and ptr being deleted, by - * sliding the entries past them down one. - * Log the changed areas of the block. - */ - if (level > 0) { - kp = XFS_INOBT_KEY_ADDR(block, 1, cur); - pp = XFS_INOBT_PTR_ADDR(block, 1, cur); -#ifdef DEBUG - for (i = ptr; i < numrecs; i++) { - if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(pp[i]), level))) - return error; - } -#endif - if (ptr < numrecs) { - memmove(&kp[ptr - 1], &kp[ptr], - (numrecs - ptr) * sizeof(*kp)); - memmove(&pp[ptr - 1], &pp[ptr], - (numrecs - ptr) * sizeof(*kp)); - xfs_inobt_log_keys(cur, bp, ptr, numrecs - 1); - xfs_inobt_log_ptrs(cur, bp, ptr, numrecs - 1); - } - } - /* - * It's a leaf. Excise the record being deleted, by sliding the - * entries past it down one. Log the changed areas of the block. - */ - else { - rp = XFS_INOBT_REC_ADDR(block, 1, cur); - if (ptr < numrecs) { - memmove(&rp[ptr - 1], &rp[ptr], - (numrecs - ptr) * sizeof(*rp)); - xfs_inobt_log_recs(cur, bp, ptr, numrecs - 1); - } - /* - * If it's the first record in the block, we'll need a key - * structure to pass up to the next level (updkey). - */ - if (ptr == 1) { - key.ir_startino = rp->ir_startino; - kp = &key; - } - } - /* - * Decrement and log the number of entries in the block. - */ - numrecs--; - block->bb_numrecs = cpu_to_be16(numrecs); - xfs_inobt_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS); - /* - * Is this the root level? If so, we're almost done. - */ - if (level == cur->bc_nlevels - 1) { - /* - * If this is the root level, - * and there's only one entry left, - * and it's NOT the leaf level, - * then we can get rid of this level. - */ - if (numrecs == 1 && level > 0) { - agbp = cur->bc_private.a.agbp; - agi = XFS_BUF_TO_AGI(agbp); - /* - * pp is still set to the first pointer in the block. - * Make it the new root of the btree. - */ - bno = be32_to_cpu(agi->agi_root); - agi->agi_root = *pp; - be32_add_cpu(&agi->agi_level, -1); - /* - * Free the block. - */ - if ((error = xfs_free_extent(cur->bc_tp, - XFS_AGB_TO_FSB(mp, cur->bc_private.a.agno, bno), 1))) - return error; - xfs_trans_binval(cur->bc_tp, bp); - xfs_ialloc_log_agi(cur->bc_tp, agbp, - XFS_AGI_ROOT | XFS_AGI_LEVEL); - /* - * Update the cursor so there's one fewer level. - */ - cur->bc_bufs[level] = NULL; - cur->bc_nlevels--; - } else if (level > 0 && - (error = xfs_btree_decrement(cur, level, &i))) - return error; - *stat = 1; - return 0; - } - /* - * If we deleted the leftmost entry in the block, update the - * key values above us in the tree. - */ - if (ptr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)kp, level + 1))) - return error; - /* - * If the number of records remaining in the block is at least - * the minimum, we're done. - */ - if (numrecs >= XFS_INOBT_BLOCK_MINRECS(level, cur)) { - if (level > 0 && - (error = xfs_btree_decrement(cur, level, &i))) - return error; - *stat = 1; - return 0; - } - /* - * Otherwise, we have to move some records around to keep the - * tree balanced. Look at the left and right sibling blocks to - * see if we can re-balance by moving only one record. - */ - rbno = be32_to_cpu(block->bb_rightsib); - lbno = be32_to_cpu(block->bb_leftsib); - bno = NULLAGBLOCK; - ASSERT(rbno != NULLAGBLOCK || lbno != NULLAGBLOCK); - /* - * Duplicate the cursor so our btree manipulations here won't - * disrupt the next level up. - */ - if ((error = xfs_btree_dup_cursor(cur, &tcur))) - return error; - /* - * If there's a right sibling, see if it's ok to shift an entry - * out of it. - */ - if (rbno != NULLAGBLOCK) { - /* - * Move the temp cursor to the last entry in the next block. - * Actually any entry but the first would suffice. - */ - i = xfs_btree_lastrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - if ((error = xfs_btree_increment(tcur, level, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - i = xfs_btree_lastrec(tcur, level); - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - /* - * Grab a pointer to the block. - */ - rbp = tcur->bc_bufs[level]; - right = XFS_BUF_TO_INOBT_BLOCK(rbp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, right, level, rbp))) - goto error0; -#endif - /* - * Grab the current block number, for future use. - */ - bno = be32_to_cpu(right->bb_leftsib); - /* - * If right block is full enough so that removing one entry - * won't make it too empty, and left-shifting an entry out - * of right to us works, we're done. - */ - if (be16_to_cpu(right->bb_numrecs) - 1 >= - XFS_INOBT_BLOCK_MINRECS(level, cur)) { - if ((error = xfs_btree_lshift(tcur, level, &i))) - goto error0; - if (i) { - ASSERT(be16_to_cpu(block->bb_numrecs) >= - XFS_INOBT_BLOCK_MINRECS(level, cur)); - xfs_btree_del_cursor(tcur, - XFS_BTREE_NOERROR); - if (level > 0 && - (error = xfs_btree_decrement(cur, level, - &i))) - return error; - *stat = 1; - return 0; - } - } - /* - * Otherwise, grab the number of records in right for - * future reference, and fix up the temp cursor to point - * to our block again (last record). - */ - rrecs = be16_to_cpu(right->bb_numrecs); - if (lbno != NULLAGBLOCK) { - xfs_btree_firstrec(tcur, level); - if ((error = xfs_btree_decrement(tcur, level, &i))) - goto error0; - } - } - /* - * If there's a left sibling, see if it's ok to shift an entry - * out of it. - */ - if (lbno != NULLAGBLOCK) { - /* - * Move the temp cursor to the first entry in the - * previous block. - */ - xfs_btree_firstrec(tcur, level); - if ((error = xfs_btree_decrement(tcur, level, &i))) - goto error0; - xfs_btree_firstrec(tcur, level); - /* - * Grab a pointer to the block. - */ - lbp = tcur->bc_bufs[level]; - left = XFS_BUF_TO_INOBT_BLOCK(lbp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, left, level, lbp))) - goto error0; -#endif - /* - * Grab the current block number, for future use. - */ - bno = be32_to_cpu(left->bb_rightsib); - /* - * If left block is full enough so that removing one entry - * won't make it too empty, and right-shifting an entry out - * of left to us works, we're done. - */ - if (be16_to_cpu(left->bb_numrecs) - 1 >= - XFS_INOBT_BLOCK_MINRECS(level, cur)) { - if ((error = xfs_btree_rshift(tcur, level, &i))) - goto error0; - if (i) { - ASSERT(be16_to_cpu(block->bb_numrecs) >= - XFS_INOBT_BLOCK_MINRECS(level, cur)); - xfs_btree_del_cursor(tcur, - XFS_BTREE_NOERROR); - if (level == 0) - cur->bc_ptrs[0]++; - *stat = 1; - return 0; - } - } - /* - * Otherwise, grab the number of records in right for - * future reference. - */ - lrecs = be16_to_cpu(left->bb_numrecs); - } - /* - * Delete the temp cursor, we're done with it. - */ - xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); - /* - * If here, we need to do a join to keep the tree balanced. - */ - ASSERT(bno != NULLAGBLOCK); - /* - * See if we can join with the left neighbor block. - */ - if (lbno != NULLAGBLOCK && - lrecs + numrecs <= XFS_INOBT_BLOCK_MAXRECS(level, cur)) { - /* - * Set "right" to be the starting block, - * "left" to be the left neighbor. - */ - rbno = bno; - right = block; - rrecs = be16_to_cpu(right->bb_numrecs); - rbp = bp; - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - cur->bc_private.a.agno, lbno, 0, &lbp, - XFS_INO_BTREE_REF))) - return error; - left = XFS_BUF_TO_INOBT_BLOCK(lbp); - lrecs = be16_to_cpu(left->bb_numrecs); - if ((error = xfs_btree_check_sblock(cur, left, level, lbp))) - return error; - } - /* - * If that won't work, see if we can join with the right neighbor block. - */ - else if (rbno != NULLAGBLOCK && - rrecs + numrecs <= XFS_INOBT_BLOCK_MAXRECS(level, cur)) { - /* - * Set "left" to be the starting block, - * "right" to be the right neighbor. - */ - lbno = bno; - left = block; - lrecs = be16_to_cpu(left->bb_numrecs); - lbp = bp; - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - cur->bc_private.a.agno, rbno, 0, &rbp, - XFS_INO_BTREE_REF))) - return error; - right = XFS_BUF_TO_INOBT_BLOCK(rbp); - rrecs = be16_to_cpu(right->bb_numrecs); - if ((error = xfs_btree_check_sblock(cur, right, level, rbp))) - return error; - } - /* - * Otherwise, we can't fix the imbalance. - * Just return. This is probably a logic error, but it's not fatal. - */ - else { - if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) - return error; - *stat = 1; - return 0; - } - /* - * We're now going to join "left" and "right" by moving all the stuff - * in "right" to "left" and deleting "right". - */ - if (level > 0) { - /* - * It's a non-leaf. Move keys and pointers. - */ - lkp = XFS_INOBT_KEY_ADDR(left, lrecs + 1, cur); - lpp = XFS_INOBT_PTR_ADDR(left, lrecs + 1, cur); - rkp = XFS_INOBT_KEY_ADDR(right, 1, cur); - rpp = XFS_INOBT_PTR_ADDR(right, 1, cur); -#ifdef DEBUG - for (i = 0; i < rrecs; i++) { - if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i]), level))) - return error; - } -#endif - memcpy(lkp, rkp, rrecs * sizeof(*lkp)); - memcpy(lpp, rpp, rrecs * sizeof(*lpp)); - xfs_inobt_log_keys(cur, lbp, lrecs + 1, lrecs + rrecs); - xfs_inobt_log_ptrs(cur, lbp, lrecs + 1, lrecs + rrecs); - } else { - /* - * It's a leaf. Move records. - */ - lrp = XFS_INOBT_REC_ADDR(left, lrecs + 1, cur); - rrp = XFS_INOBT_REC_ADDR(right, 1, cur); - memcpy(lrp, rrp, rrecs * sizeof(*lrp)); - xfs_inobt_log_recs(cur, lbp, lrecs + 1, lrecs + rrecs); - } - /* - * If we joined with the left neighbor, set the buffer in the - * cursor to the left block, and fix up the index. - */ - if (bp != lbp) { - xfs_btree_setbuf(cur, level, lbp); - cur->bc_ptrs[level] += lrecs; - } - /* - * If we joined with the right neighbor and there's a level above - * us, increment the cursor at that level. - */ - else if (level + 1 < cur->bc_nlevels && - (error = xfs_btree_increment(cur, level + 1, &i))) - return error; - /* - * Fix up the number of records in the surviving block. - */ - lrecs += rrecs; - left->bb_numrecs = cpu_to_be16(lrecs); - /* - * Fix up the right block pointer in the surviving block, and log it. - */ - left->bb_rightsib = right->bb_rightsib; - xfs_inobt_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB); - /* - * If there is a right sibling now, make it point to the - * remaining block. - */ - if (be32_to_cpu(left->bb_rightsib) != NULLAGBLOCK) { - xfs_inobt_block_t *rrblock; - xfs_buf_t *rrbp; - - if ((error = xfs_btree_read_bufs(mp, cur->bc_tp, - cur->bc_private.a.agno, be32_to_cpu(left->bb_rightsib), 0, - &rrbp, XFS_INO_BTREE_REF))) - return error; - rrblock = XFS_BUF_TO_INOBT_BLOCK(rrbp); - if ((error = xfs_btree_check_sblock(cur, rrblock, level, rrbp))) - return error; - rrblock->bb_leftsib = cpu_to_be32(lbno); - xfs_inobt_log_block(cur->bc_tp, rrbp, XFS_BB_LEFTSIB); - } - /* - * Free the deleting block. - */ - if ((error = xfs_free_extent(cur->bc_tp, XFS_AGB_TO_FSB(mp, - cur->bc_private.a.agno, rbno), 1))) - return error; - xfs_trans_binval(cur->bc_tp, rbp); - /* - * Readjust the ptr at this level if it's not a leaf, since it's - * still pointing at the deletion point, which makes the cursor - * inconsistent. If this makes the ptr 0, the caller fixes it up. - * We can't use decrement because it would change the next level up. - */ - if (level > 0) - cur->bc_ptrs[level]--; - /* - * Return value means the next level up has something to do. - */ - *stat = 2; - return 0; - -error0: - xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); - return error; -} - -/* - * Log header fields from a btree block. - */ -STATIC void -xfs_inobt_log_block( - xfs_trans_t *tp, /* transaction pointer */ - xfs_buf_t *bp, /* buffer containing btree block */ - int fields) /* mask of fields: XFS_BB_... */ -{ - int first; /* first byte offset logged */ - int last; /* last byte offset logged */ - static const short offsets[] = { /* table of offsets */ - offsetof(xfs_inobt_block_t, bb_magic), - offsetof(xfs_inobt_block_t, bb_level), - offsetof(xfs_inobt_block_t, bb_numrecs), - offsetof(xfs_inobt_block_t, bb_leftsib), - offsetof(xfs_inobt_block_t, bb_rightsib), - sizeof(xfs_inobt_block_t) - }; - - xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first, &last); - xfs_trans_log_buf(tp, bp, first, last); -} - -/* - * Log keys from a btree block (nonleaf). - */ -STATIC void -xfs_inobt_log_keys( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_buf_t *bp, /* buffer containing btree block */ - int kfirst, /* index of first key to log */ - int klast) /* index of last key to log */ -{ - xfs_inobt_block_t *block; /* btree block to log from */ - int first; /* first byte offset logged */ - xfs_inobt_key_t *kp; /* key pointer in btree block */ - int last; /* last byte offset logged */ - - block = XFS_BUF_TO_INOBT_BLOCK(bp); - kp = XFS_INOBT_KEY_ADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(cur->bc_tp, bp, first, last); -} - -/* - * Log block pointer fields from a btree block (nonleaf). - */ -STATIC void -xfs_inobt_log_ptrs( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_buf_t *bp, /* buffer containing btree block */ - int pfirst, /* index of first pointer to log */ - int plast) /* index of last pointer to log */ -{ - xfs_inobt_block_t *block; /* btree block to log from */ - int first; /* first byte offset logged */ - int last; /* last byte offset logged */ - xfs_inobt_ptr_t *pp; /* block-pointer pointer in btree blk */ - - block = XFS_BUF_TO_INOBT_BLOCK(bp); - pp = XFS_INOBT_PTR_ADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(cur->bc_tp, bp, first, last); -} - -/* - * Log records from a btree block (leaf). - */ -STATIC void -xfs_inobt_log_recs( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_buf_t *bp, /* buffer containing btree block */ - int rfirst, /* index of first record to log */ - int rlast) /* index of last record to log */ -{ - xfs_inobt_block_t *block; /* btree block to log from */ - int first; /* first byte offset logged */ - int last; /* last byte offset logged */ - xfs_inobt_rec_t *rp; /* record pointer for btree block */ - - block = XFS_BUF_TO_INOBT_BLOCK(bp); - rp = XFS_INOBT_REC_ADDR(block, 1, cur); - first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block); - last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block); - xfs_trans_log_buf(cur->bc_tp, bp, first, last); -} - - -/* - * Externally visible routines. - */ - -/* - * Delete the record pointed to by cur. - * The cursor refers to the place where the record was (could be inserted) - * when the operation returns. - */ -int /* error */ -xfs_inobt_delete( - xfs_btree_cur_t *cur, /* btree cursor */ - int *stat) /* success/failure */ -{ - int error; - int i; /* result code */ - int level; /* btree level */ - - /* - * Go up the tree, starting at leaf level. - * If 2 is returned then a join was done; go to the next level. - * Otherwise we are done. - */ - for (level = 0, i = 2; i == 2; level++) { - if ((error = xfs_inobt_delrec(cur, level, &i))) - return error; - } - if (i == 0) { - for (level = 1; level < cur->bc_nlevels; level++) { - if (cur->bc_ptrs[level] == 0) { - if ((error = xfs_btree_decrement(cur, level, &i))) - return error; - break; - } - } - } - *stat = i; - return 0; -} - /* * Get the data from the pointed-to record. @@ -690,6 +85,13 @@ xfs_inobt_get_rec( return 0; } +STATIC int +xfs_inobt_get_minrecs( + struct xfs_btree_cur *cur, + int level) +{ + return cur->bc_mp->m_inobt_mnr[level != 0]; +} STATIC struct xfs_btree_cur * xfs_inobt_dup_cursor( @@ -829,6 +231,38 @@ xfs_inobt_key_diff( cur->bc_rec.i.ir_startino; } +STATIC int +xfs_inobt_kill_root( + struct xfs_btree_cur *cur, + struct xfs_buf *bp, + int level, + union xfs_btree_ptr *newroot) +{ + int error; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); + XFS_BTREE_STATS_INC(cur, killroot); + + /* + * Update the root pointer, decreasing the level by 1 and then + * free the old root. + */ + xfs_inobt_set_root(cur, newroot, -1); + error = xfs_inobt_free_block(cur, bp); + if (error) { + XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); + return error; + } + + XFS_BTREE_STATS_INC(cur, free); + + cur->bc_bufs[level] = NULL; + cur->bc_nlevels--; + + XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); + return 0; +} + #ifdef XFS_BTREE_TRACE ktrace_t *xfs_inobt_trace_buf; @@ -901,8 +335,10 @@ static const struct xfs_btree_ops xfs_inobt_ops = { .dup_cursor = xfs_inobt_dup_cursor, .set_root = xfs_inobt_set_root, + .kill_root = xfs_inobt_kill_root, .alloc_block = xfs_inobt_alloc_block, .free_block = xfs_inobt_free_block, + .get_minrecs = xfs_inobt_get_minrecs, .get_maxrecs = xfs_inobt_get_maxrecs, .init_key_from_rec = xfs_inobt_init_key_from_rec, .init_rec_from_key = xfs_inobt_init_rec_from_key, diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index c9cbc4f2168..3eff3b6e5fa 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -116,13 +116,6 @@ typedef struct xfs_btree_sblock xfs_inobt_block_t; (XFS_BTREE_PTR_ADDR(xfs_inobt, bb, \ i, XFS_INOBT_BLOCK_MAXRECS(1, cur))) -/* - * Delete the record pointed to by cur. - * The cursor refers to the place where the record was (could be inserted) - * when the operation returns. - */ -extern int xfs_inobt_delete(struct xfs_btree_cur *cur, int *stat); - /* * Get the data from the pointed-to record. */ -- cgit v1.2.3-70-g09d2 From 8cc938fe4237e50bea4aa557ed53b06de2319d49 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:58:11 +1100 Subject: [XFS] implement generic xfs_btree_get_rec Not really much reason to make it generic given that it's so small, but this is the last non-method in xfs_alloc_btree.c and xfs_ialloc_btree.c, so it makes the whole btree implementation more structured. SGI-PV: 985583 SGI-Modid: xfs-linux-melb:xfs-kern:32206a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc.c | 21 +++++++++++++++++++++ fs/xfs/xfs_alloc_btree.c | 44 -------------------------------------------- fs/xfs/xfs_alloc_btree.h | 6 ------ fs/xfs/xfs_btree.c | 41 +++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_btree.h | 1 + fs/xfs/xfs_ialloc.c | 23 +++++++++++++++++++++++ fs/xfs/xfs_ialloc.h | 5 +++++ fs/xfs/xfs_ialloc_btree.c | 44 -------------------------------------------- fs/xfs/xfs_ialloc_btree.h | 7 ------- 9 files changed, 91 insertions(+), 101 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index e9c70249d2c..54fa69e2776 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -154,6 +154,27 @@ xfs_alloc_update( return xfs_btree_update(cur, &rec); } +/* + * Get the data from the pointed-to record. + */ +STATIC int /* error */ +xfs_alloc_get_rec( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t *bno, /* output: starting block of extent */ + xfs_extlen_t *len, /* output: length of extent */ + int *stat) /* output: success/failure */ +{ + union xfs_btree_rec *rec; + int error; + + error = xfs_btree_get_rec(cur, &rec, stat); + if (!error && *stat == 1) { + *bno = be32_to_cpu(rec->alloc.ar_startblock); + *len = be32_to_cpu(rec->alloc.ar_blockcount); + } + return error; +} + /* * Compute aligned version of the found extent. * Takes alignment and min length into account. diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index d256b51f913..4d44f03858b 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -41,50 +41,6 @@ #include "xfs_error.h" -/* - * Get the data from the pointed-to record. - */ -int /* error */ -xfs_alloc_get_rec( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agblock_t *bno, /* output: starting block of extent */ - xfs_extlen_t *len, /* output: length of extent */ - int *stat) /* output: success/failure */ -{ - xfs_alloc_block_t *block; /* btree block */ -#ifdef DEBUG - int error; /* error return value */ -#endif - int ptr; /* record number */ - - ptr = cur->bc_ptrs[0]; - block = XFS_BUF_TO_ALLOC_BLOCK(cur->bc_bufs[0]); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, 0, cur->bc_bufs[0]))) - return error; -#endif - /* - * Off the right end or left end, return failure. - */ - if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) { - *stat = 0; - return 0; - } - /* - * Point to the record and extract its data. - */ - { - xfs_alloc_rec_t *rec; /* record data */ - - rec = XFS_ALLOC_REC_ADDR(block, ptr, cur); - *bno = be32_to_cpu(rec->ar_startblock); - *len = be32_to_cpu(rec->ar_blockcount); - } - *stat = 1; - return 0; -} - - STATIC struct xfs_btree_cur * xfs_allocbt_dup_cursor( struct xfs_btree_cur *cur) diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 8d2e3ec21fd..22f1d709af7 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -94,12 +94,6 @@ typedef struct xfs_btree_sblock xfs_alloc_block_t; #define XFS_ALLOC_PTR_ADDR(bb,i,cur) \ XFS_BTREE_PTR_ADDR(xfs_alloc, bb, i, XFS_ALLOC_BLOCK_MAXRECS(1, cur)) -/* - * Get the data from the pointed-to record. - */ -extern int xfs_alloc_get_rec(struct xfs_btree_cur *cur, xfs_agblock_t *bno, - xfs_extlen_t *len, int *stat); - extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 28cc7681834..8503ed5d10a 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -3764,3 +3764,44 @@ error0: XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); return error; } + +/* + * Get the data from the pointed-to record. + */ +int /* error */ +xfs_btree_get_rec( + struct xfs_btree_cur *cur, /* btree cursor */ + union xfs_btree_rec **recp, /* output: btree record */ + int *stat) /* output: success/failure */ +{ + struct xfs_btree_block *block; /* btree block */ + struct xfs_buf *bp; /* buffer pointer */ + int ptr; /* record number */ +#ifdef DEBUG + int error; /* error return value */ +#endif + + ptr = cur->bc_ptrs[0]; + block = xfs_btree_get_block(cur, 0, &bp); + +#ifdef DEBUG + error = xfs_btree_check_block(cur, block, 0, bp); + if (error) + return error; +#endif + + /* + * Off the right end or left end, return failure. + */ + if (ptr > xfs_btree_get_numrecs(block) || ptr <= 0) { + *stat = 0; + return 0; + } + + /* + * Point to the record and extract its data. + */ + *recp = xfs_btree_rec_addr(cur, ptr, block); + *stat = 1; + return 0; +} diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index 06ef792e0aa..cee3684d871 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -567,6 +567,7 @@ int xfs_btree_new_iroot(struct xfs_btree_cur *, int *, int *); int xfs_btree_kill_iroot(struct xfs_btree_cur *); int xfs_btree_insert(struct xfs_btree_cur *, int *); int xfs_btree_delete(struct xfs_btree_cur *, int *); +int xfs_btree_get_rec(struct xfs_btree_cur *, union xfs_btree_rec **, int *); /* * Helpers. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index f13f59b13cc..c8a56c52964 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -191,6 +191,29 @@ xfs_inobt_update( return xfs_btree_update(cur, &rec); } +/* + * Get the data from the pointed-to record. + */ +int /* error */ +xfs_inobt_get_rec( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agino_t *ino, /* output: starting inode of chunk */ + __int32_t *fcnt, /* output: number of free inodes */ + xfs_inofree_t *free, /* output: free inode mask */ + int *stat) /* output: success/failure */ +{ + union xfs_btree_rec *rec; + int error; + + error = xfs_btree_get_rec(cur, &rec, stat); + if (!error && *stat == 1) { + *ino = be32_to_cpu(rec->inobt.ir_startino); + *fcnt = be32_to_cpu(rec->inobt.ir_freecount); + *free = be64_to_cpu(rec->inobt.ir_free); + } + return error; +} + /* * Allocate new inodes in the allocation group specified by agbp. * Return 0 for success, else error code. diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h index 4026578bc26..c5745f6d94e 100644 --- a/fs/xfs/xfs_ialloc.h +++ b/fs/xfs/xfs_ialloc.h @@ -168,6 +168,11 @@ int xfs_inobt_lookup_ge(struct xfs_btree_cur *cur, xfs_agino_t ino, int xfs_inobt_lookup_le(struct xfs_btree_cur *cur, xfs_agino_t ino, __int32_t fcnt, xfs_inofree_t free, int *stat); +/* + * Get the data from the pointed-to record. + */ +extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino, + __int32_t *fcnt, xfs_inofree_t *free, int *stat); #endif /* __KERNEL__ */ diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 6c0a07d1fed..9f4e33c945c 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -41,50 +41,6 @@ #include "xfs_error.h" -/* - * Get the data from the pointed-to record. - */ -int /* error */ -xfs_inobt_get_rec( - xfs_btree_cur_t *cur, /* btree cursor */ - xfs_agino_t *ino, /* output: starting inode of chunk */ - __int32_t *fcnt, /* output: number of free inodes */ - xfs_inofree_t *free, /* output: free inode mask */ - int *stat) /* output: success/failure */ -{ - xfs_inobt_block_t *block; /* btree block */ - xfs_buf_t *bp; /* buffer containing btree block */ -#ifdef DEBUG - int error; /* error return value */ -#endif - int ptr; /* record number */ - xfs_inobt_rec_t *rec; /* record data */ - - bp = cur->bc_bufs[0]; - ptr = cur->bc_ptrs[0]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, 0, bp))) - return error; -#endif - /* - * Off the right end or left end, return failure. - */ - if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) { - *stat = 0; - return 0; - } - /* - * Point to the record and extract its data. - */ - rec = XFS_INOBT_REC_ADDR(block, ptr, cur); - *ino = be32_to_cpu(rec->ir_startino); - *fcnt = be32_to_cpu(rec->ir_freecount); - *free = be64_to_cpu(rec->ir_free); - *stat = 1; - return 0; -} - STATIC int xfs_inobt_get_minrecs( struct xfs_btree_cur *cur, diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 3eff3b6e5fa..ff7406b4bac 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -116,13 +116,6 @@ typedef struct xfs_btree_sblock xfs_inobt_block_t; (XFS_BTREE_PTR_ADDR(xfs_inobt, bb, \ i, XFS_INOBT_BLOCK_MAXRECS(1, cur))) -/* - * Get the data from the pointed-to record. - */ -extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_agino_t *ino, - __int32_t *fcnt, xfs_inofree_t *free, int *stat); - - extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t); -- cgit v1.2.3-70-g09d2 From 5e1be0fb1a3950597aeda448698e85b0595a2e92 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:37 +1100 Subject: [XFS] factor out xfs_read_agi helper Add a helper to read the AGI header and perform basic verification. Based on hunks from a larger patch from Dave Chinner. (First sent on Juli 23rd) Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_ag.h | 3 ++ fs/xfs/xfs_ialloc.c | 101 +++++++++++++++++++++++++++++------------------ fs/xfs/xfs_inode.c | 57 +++----------------------- fs/xfs/xfs_log_recover.c | 72 ++++++++++++--------------------- 4 files changed, 98 insertions(+), 135 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 2bfd8632914..f4a315390c6 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -142,6 +142,9 @@ typedef struct xfs_agi { #define XFS_AGI_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGI_DADDR(mp)) #define XFS_BUF_TO_AGI(bp) ((xfs_agi_t *)XFS_BUF_PTR(bp)) +extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp, + xfs_agnumber_t agno, struct xfs_buf **bpp); + /* * The third a.g. block contains the a.g. freelist, an array * of block pointers to blocks owned by the allocation btree code. diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index c8a56c52964..efb65fea203 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -1462,70 +1462,95 @@ xfs_ialloc_log_agi( xfs_trans_log_buf(tp, bp, first, last); } +#ifdef DEBUG +STATIC void +xfs_check_agi_unlinked( + struct xfs_agi *agi) +{ + int i; + + for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) + ASSERT(agi->agi_unlinked[i]); +} +#else +#define xfs_check_agi_unlinked(agi) +#endif + /* * Read in the allocation group header (inode allocation section) */ int -xfs_ialloc_read_agi( - xfs_mount_t *mp, /* file system mount structure */ - xfs_trans_t *tp, /* transaction pointer */ - xfs_agnumber_t agno, /* allocation group number */ - xfs_buf_t **bpp) /* allocation group hdr buf */ +xfs_read_agi( + struct xfs_mount *mp, /* file system mount structure */ + struct xfs_trans *tp, /* transaction pointer */ + xfs_agnumber_t agno, /* allocation group number */ + struct xfs_buf **bpp) /* allocation group hdr buf */ { - xfs_agi_t *agi; /* allocation group header */ - int agi_ok; /* agi is consistent */ - xfs_buf_t *bp; /* allocation group hdr buf */ - xfs_perag_t *pag; /* per allocation group data */ - int error; + struct xfs_agi *agi; /* allocation group header */ + int agi_ok; /* agi is consistent */ + int error; ASSERT(agno != NULLAGNUMBER); - error = xfs_trans_read_buf( - mp, tp, mp->m_ddev_targp, + + error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0, &bp); + XFS_FSS_TO_BB(mp, 1), 0, bpp); if (error) return error; - ASSERT(bp && !XFS_BUF_GETERROR(bp)); + + ASSERT(*bpp && !XFS_BUF_GETERROR(*bpp)); + agi = XFS_BUF_TO_AGI(*bpp); /* * Validate the magic number of the agi block. */ - agi = XFS_BUF_TO_AGI(bp); - agi_ok = - be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && - XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); + agi_ok = be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && + XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)) && + be32_to_cpu(agi->agi_seqno) == agno; if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI, XFS_RANDOM_IALLOC_READ_AGI))) { - XFS_CORRUPTION_ERROR("xfs_ialloc_read_agi", XFS_ERRLEVEL_LOW, + XFS_CORRUPTION_ERROR("xfs_read_agi", XFS_ERRLEVEL_LOW, mp, agi); - xfs_trans_brelse(tp, bp); + xfs_trans_brelse(tp, *bpp); return XFS_ERROR(EFSCORRUPTED); } + + XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_AGI, XFS_AGI_REF); + + xfs_check_agi_unlinked(agi); + return 0; +} + +int +xfs_ialloc_read_agi( + struct xfs_mount *mp, /* file system mount structure */ + struct xfs_trans *tp, /* transaction pointer */ + xfs_agnumber_t agno, /* allocation group number */ + struct xfs_buf **bpp) /* allocation group hdr buf */ +{ + struct xfs_agi *agi; /* allocation group header */ + struct xfs_perag *pag; /* per allocation group data */ + int error; + + error = xfs_read_agi(mp, tp, agno, bpp); + if (error) + return error; + + agi = XFS_BUF_TO_AGI(*bpp); pag = &mp->m_perag[agno]; + if (!pag->pagi_init) { pag->pagi_freecount = be32_to_cpu(agi->agi_freecount); pag->pagi_count = be32_to_cpu(agi->agi_count); pag->pagi_init = 1; - } else { - /* - * It's possible for these to be out of sync if - * we are in the middle of a forced shutdown. - */ - ASSERT(pag->pagi_freecount == be32_to_cpu(agi->agi_freecount) || - XFS_FORCED_SHUTDOWN(mp)); - } - -#ifdef DEBUG - { - int i; - - for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) - ASSERT(agi->agi_unlinked[i]); } -#endif - XFS_BUF_SET_VTYPE_REF(bp, B_FS_AGI, XFS_AGI_REF); - *bpp = bp; + /* + * It's possible for these to be out of sync if + * we are in the middle of a forced shutdown. + */ + ASSERT(pag->pagi_freecount == be32_to_cpu(agi->agi_freecount) || + XFS_FORCED_SHUTDOWN(mp)); return 0; } diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index b9771004706..46b0526acd4 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1843,13 +1843,10 @@ xfs_iunlink( xfs_dinode_t *dip; xfs_buf_t *agibp; xfs_buf_t *ibp; - xfs_agnumber_t agno; - xfs_daddr_t agdaddr; xfs_agino_t agino; short bucket_index; int offset; int error; - int agi_ok; ASSERT(ip->i_d.di_nlink == 0); ASSERT(ip->i_d.di_mode != 0); @@ -1857,31 +1854,15 @@ xfs_iunlink( mp = tp->t_mountp; - agno = XFS_INO_TO_AGNO(mp, ip->i_ino); - agdaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)); - /* * Get the agi buffer first. It ensures lock ordering * on the list. */ - error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, agdaddr, - XFS_FSS_TO_BB(mp, 1), 0, &agibp); + error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp); if (error) return error; - - /* - * Validate the magic number of the agi block. - */ agi = XFS_BUF_TO_AGI(agibp); - agi_ok = - be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && - XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); - if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IUNLINK, - XFS_RANDOM_IUNLINK))) { - XFS_CORRUPTION_ERROR("xfs_iunlink", XFS_ERRLEVEL_LOW, mp, agi); - xfs_trans_brelse(tp, agibp); - return XFS_ERROR(EFSCORRUPTED); - } + /* * Get the index into the agi hash table for the * list this inode will go on. @@ -1941,7 +1922,6 @@ xfs_iunlink_remove( xfs_buf_t *agibp; xfs_buf_t *ibp; xfs_agnumber_t agno; - xfs_daddr_t agdaddr; xfs_agino_t agino; xfs_agino_t next_agino; xfs_buf_t *last_ibp; @@ -1949,45 +1929,20 @@ xfs_iunlink_remove( short bucket_index; int offset, last_offset = 0; int error; - int agi_ok; - /* - * First pull the on-disk inode from the AGI unlinked list. - */ mp = tp->t_mountp; - agno = XFS_INO_TO_AGNO(mp, ip->i_ino); - agdaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)); /* * Get the agi buffer first. It ensures lock ordering * on the list. */ - error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, agdaddr, - XFS_FSS_TO_BB(mp, 1), 0, &agibp); - if (error) { - cmn_err(CE_WARN, - "xfs_iunlink_remove: xfs_trans_read_buf() returned an error %d on %s. Returning error.", - error, mp->m_fsname); + error = xfs_read_agi(mp, tp, agno, &agibp); + if (error) return error; - } - /* - * Validate the magic number of the agi block. - */ + agi = XFS_BUF_TO_AGI(agibp); - agi_ok = - be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && - XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); - if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IUNLINK_REMOVE, - XFS_RANDOM_IUNLINK_REMOVE))) { - XFS_CORRUPTION_ERROR("xfs_iunlink_remove", XFS_ERRLEVEL_LOW, - mp, agi); - xfs_trans_brelse(tp, agibp); - cmn_err(CE_WARN, - "xfs_iunlink_remove: XFS_TEST_ERROR() returned an error on %s. Returning EFSCORRUPTED.", - mp->m_fsname); - return XFS_ERROR(EFSCORRUPTED); - } + /* * Get the index into the agi hash table for the * list this inode will go on. diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index b411d494731..b552676ca5c 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -3117,19 +3117,16 @@ xlog_recover_clear_agi_bucket( int error; tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET); - error = xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), 0, 0, 0); - if (!error) - error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, - XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0, &agibp); + error = xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), + 0, 0, 0); if (error) goto out_abort; - error = EINVAL; - agi = XFS_BUF_TO_AGI(agibp); - if (be32_to_cpu(agi->agi_magicnum) != XFS_AGI_MAGIC) + error = xfs_read_agi(mp, tp, agno, &agibp); + if (error) goto out_abort; + agi = XFS_BUF_TO_AGI(agibp); agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO); offset = offsetof(xfs_agi_t, agi_unlinked) + (sizeof(xfs_agino_t) * bucket); @@ -3190,16 +3187,17 @@ xlog_recover_process_iunlinks( /* * Find the agi for this ag. */ - agibp = xfs_buf_read(mp->m_ddev_targp, - XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0); - if (XFS_BUF_ISERROR(agibp)) { - xfs_ioerror_alert("xlog_recover_process_iunlinks(#1)", - log->l_mp, agibp, - XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp))); + error = xfs_read_agi(mp, NULL, agno, &agibp); + if (error) { + /* + * AGI is b0rked. Don't process it. + * + * We should probably mark the filesystem as corrupt + * after we've recovered all the ag's we can.... + */ + continue; } agi = XFS_BUF_TO_AGI(agibp); - ASSERT(XFS_AGI_MAGIC == be32_to_cpu(agi->agi_magicnum)); for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) { @@ -3278,22 +3276,12 @@ xlog_recover_process_iunlinks( /* * Reacquire the agibuffer and continue around - * the loop. + * the loop. This should never fail as we know + * the buffer was good earlier on. */ - agibp = xfs_buf_read(mp->m_ddev_targp, - XFS_AG_DADDR(mp, agno, - XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0); - if (XFS_BUF_ISERROR(agibp)) { - xfs_ioerror_alert( - "xlog_recover_process_iunlinks(#2)", - log->l_mp, agibp, - XFS_AG_DADDR(mp, agno, - XFS_AGI_DADDR(mp))); - } + error = xfs_read_agi(mp, NULL, agno, &agibp); + ASSERT(error == 0); agi = XFS_BUF_TO_AGI(agibp); - ASSERT(XFS_AGI_MAGIC == be32_to_cpu( - agi->agi_magicnum)); } } @@ -3980,11 +3968,9 @@ xlog_recover_check_summary( { xfs_mount_t *mp; xfs_agf_t *agfp; - xfs_agi_t *agip; xfs_buf_t *agfbp; xfs_buf_t *agibp; xfs_daddr_t agfdaddr; - xfs_daddr_t agidaddr; xfs_buf_t *sbbp; #ifdef XFS_LOUD_RECOVERY xfs_sb_t *sbp; @@ -3993,6 +3979,7 @@ xlog_recover_check_summary( __uint64_t freeblks; __uint64_t itotal; __uint64_t ifree; + int error; mp = log->l_mp; @@ -4016,21 +4003,14 @@ xlog_recover_check_summary( be32_to_cpu(agfp->agf_flcount); xfs_buf_relse(agfbp); - agidaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)); - agibp = xfs_buf_read(mp->m_ddev_targp, agidaddr, - XFS_FSS_TO_BB(mp, 1), 0); - if (XFS_BUF_ISERROR(agibp)) { - xfs_ioerror_alert("xlog_recover_check_summary(agi)", - mp, agibp, agidaddr); - } - agip = XFS_BUF_TO_AGI(agibp); - ASSERT(XFS_AGI_MAGIC == be32_to_cpu(agip->agi_magicnum)); - ASSERT(XFS_AGI_GOOD_VERSION(be32_to_cpu(agip->agi_versionnum))); - ASSERT(be32_to_cpu(agip->agi_seqno) == agno); + error = xfs_read_agi(mp, NULL, agno, &agibp); + if (!error) { + struct xfs_agi *agi = XFS_BUF_TO_AGI(agibp); - itotal += be32_to_cpu(agip->agi_count); - ifree += be32_to_cpu(agip->agi_freecount); - xfs_buf_relse(agibp); + itotal += be32_to_cpu(agi->agi_count); + ifree += be32_to_cpu(agi->agi_freecount); + xfs_buf_relse(agibp); + } } sbbp = xfs_getsb(mp, 0); -- cgit v1.2.3-70-g09d2 From d42f08f61c5e7f0ed4c6b6df4c9987ddb85ec66e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:38 +1100 Subject: [XFS] kill xfs_ialloc_log_di xfs_ialloc_log_di is only used to log the full inode core + di_next_unlinked. That means all the offset magic is not nessecary and we can simply use xfs_trans_log_buf directly. Also add a comment describing what we should do here instead. (First sent on October 7th) Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_dinode.h | 34 ------------------------ fs/xfs/xfs_ialloc.c | 75 +++++++---------------------------------------------- 2 files changed, 10 insertions(+), 99 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h index d7cf392cc85..10f9204b81e 100644 --- a/fs/xfs/xfs_dinode.h +++ b/fs/xfs/xfs_dinode.h @@ -105,40 +105,6 @@ typedef struct xfs_dinode #define XFS_MAXLINK ((1U << 31) - 1U) #define XFS_MAXLINK_1 65535U -/* - * Bit names for logging disk inodes only - */ -#define XFS_DI_MAGIC 0x0000001 -#define XFS_DI_MODE 0x0000002 -#define XFS_DI_VERSION 0x0000004 -#define XFS_DI_FORMAT 0x0000008 -#define XFS_DI_ONLINK 0x0000010 -#define XFS_DI_UID 0x0000020 -#define XFS_DI_GID 0x0000040 -#define XFS_DI_NLINK 0x0000080 -#define XFS_DI_PROJID 0x0000100 -#define XFS_DI_PAD 0x0000200 -#define XFS_DI_ATIME 0x0000400 -#define XFS_DI_MTIME 0x0000800 -#define XFS_DI_CTIME 0x0001000 -#define XFS_DI_SIZE 0x0002000 -#define XFS_DI_NBLOCKS 0x0004000 -#define XFS_DI_EXTSIZE 0x0008000 -#define XFS_DI_NEXTENTS 0x0010000 -#define XFS_DI_NAEXTENTS 0x0020000 -#define XFS_DI_FORKOFF 0x0040000 -#define XFS_DI_AFORMAT 0x0080000 -#define XFS_DI_DMEVMASK 0x0100000 -#define XFS_DI_DMSTATE 0x0200000 -#define XFS_DI_FLAGS 0x0400000 -#define XFS_DI_GEN 0x0800000 -#define XFS_DI_NEXT_UNLINKED 0x1000000 -#define XFS_DI_U 0x2000000 -#define XFS_DI_A 0x4000000 -#define XFS_DI_NUM_BITS 27 -#define XFS_DI_ALL_BITS ((1 << XFS_DI_NUM_BITS) - 1) -#define XFS_DI_CORE_BITS (XFS_DI_ALL_BITS & ~(XFS_DI_U|XFS_DI_A)) - /* * Values for di_format */ diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index efb65fea203..86d463ee7b9 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -41,68 +41,6 @@ #include "xfs_error.h" #include "xfs_bmap.h" -/* - * Log specified fields for the inode given by bp and off. - */ -STATIC void -xfs_ialloc_log_di( - xfs_trans_t *tp, /* transaction pointer */ - xfs_buf_t *bp, /* inode buffer */ - int off, /* index of inode in buffer */ - int fields) /* bitmask of fields to log */ -{ - int first; /* first byte number */ - int ioffset; /* off in bytes */ - int last; /* last byte number */ - xfs_mount_t *mp; /* mount point structure */ - static const short offsets[] = { /* field offsets */ - /* keep in sync with bits */ - offsetof(xfs_dinode_core_t, di_magic), - offsetof(xfs_dinode_core_t, di_mode), - offsetof(xfs_dinode_core_t, di_version), - offsetof(xfs_dinode_core_t, di_format), - offsetof(xfs_dinode_core_t, di_onlink), - offsetof(xfs_dinode_core_t, di_uid), - offsetof(xfs_dinode_core_t, di_gid), - offsetof(xfs_dinode_core_t, di_nlink), - offsetof(xfs_dinode_core_t, di_projid), - offsetof(xfs_dinode_core_t, di_pad), - offsetof(xfs_dinode_core_t, di_atime), - offsetof(xfs_dinode_core_t, di_mtime), - offsetof(xfs_dinode_core_t, di_ctime), - offsetof(xfs_dinode_core_t, di_size), - offsetof(xfs_dinode_core_t, di_nblocks), - offsetof(xfs_dinode_core_t, di_extsize), - offsetof(xfs_dinode_core_t, di_nextents), - offsetof(xfs_dinode_core_t, di_anextents), - offsetof(xfs_dinode_core_t, di_forkoff), - offsetof(xfs_dinode_core_t, di_aformat), - offsetof(xfs_dinode_core_t, di_dmevmask), - offsetof(xfs_dinode_core_t, di_dmstate), - offsetof(xfs_dinode_core_t, di_flags), - offsetof(xfs_dinode_core_t, di_gen), - offsetof(xfs_dinode_t, di_next_unlinked), - offsetof(xfs_dinode_t, di_u), - offsetof(xfs_dinode_t, di_a), - sizeof(xfs_dinode_t) - }; - - - ASSERT(offsetof(xfs_dinode_t, di_core) == 0); - ASSERT((fields & (XFS_DI_U|XFS_DI_A)) == 0); - mp = tp->t_mountp; - /* - * Get the inode-relative first and last bytes for these fields - */ - xfs_btree_offsets(fields, offsets, XFS_DI_NUM_BITS, &first, &last); - /* - * Convert to buffer offsets and log it. - */ - ioffset = off << mp->m_sb.sb_inodelog; - first += ioffset; - last += ioffset; - xfs_trans_log_buf(tp, bp, first, last); -} /* * Allocation group level functions. @@ -406,18 +344,25 @@ xfs_ialloc_ag_alloc( XFS_BUF_LOCK); ASSERT(fbuf); ASSERT(!XFS_BUF_GETERROR(fbuf)); + /* - * Set initial values for the inodes in this buffer. + * Initialize all inodes in this buffer and then log them. + * + * XXX: It would be much better if we had just one transaction to + * log a whole cluster of inodes instead of all the indivdual + * transactions causing a lot of log traffic. */ xfs_biozero(fbuf, 0, ninodes << args.mp->m_sb.sb_inodelog); for (i = 0; i < ninodes; i++) { + int ioffset = i << args.mp->m_sb.sb_inodelog; + uint isize = sizeof(xfs_dinode_t) + sizeof(__be32); + free = XFS_MAKE_IPTR(args.mp, fbuf, i); free->di_core.di_magic = cpu_to_be16(XFS_DINODE_MAGIC); free->di_core.di_version = version; free->di_core.di_gen = cpu_to_be32(gen); free->di_next_unlinked = cpu_to_be32(NULLAGINO); - xfs_ialloc_log_di(tp, fbuf, i, - XFS_DI_CORE_BITS | XFS_DI_NEXT_UNLINKED); + xfs_trans_log_buf(tp, fbuf, ioffset, ioffset + isize - 1); } xfs_trans_inode_alloc_buf(tp, fbuf); } -- cgit v1.2.3-70-g09d2 From 81591fe2db19d0fc1ec2aaaa6a790a5ab97ac3ab Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:39 +1100 Subject: [XFS] kill xfs_dinode_core_t Now that we have a separate xfs_icdinode_t for the in-core inode which gets logged there is no need anymore for the xfs_dinode vs xfs_dinode_core split - the fact that part of the structure gets logged through the inode log item and a small part not can better be described in a comment. All sizeof operations on the dinode_core either really wanted the icdinode and are switched to that one, or had already added the size of the agi unlinked list pointer. Later both will be replaced with helpers once we get the larger CRC-enabled dinode. Removing the data and attribute fork unions also has the advantage that xfs_dinode.h doesn't need to pull in every header under the sun. While we're at it also add some more comments describing the dinode structure. (First sent on October 7th) Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_dinode.h | 104 +++++++++++++++++++++++------------------------ fs/xfs/xfs_dir2_sf.h | 7 ---- fs/xfs/xfs_ialloc.c | 8 ++-- fs/xfs/xfs_inode.c | 85 +++++++++++++++++++------------------- fs/xfs/xfs_inode.h | 7 ++-- fs/xfs/xfs_inode_item.c | 2 +- fs/xfs/xfs_itable.c | 20 ++++----- fs/xfs/xfs_log_recover.c | 29 ++++++------- fs/xfs/xfs_mount.c | 3 +- 9 files changed, 124 insertions(+), 141 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h index 10f9204b81e..0b7ebf922af 100644 --- a/fs/xfs/xfs_dinode.h +++ b/fs/xfs/xfs_dinode.h @@ -18,32 +18,32 @@ #ifndef __XFS_DINODE_H__ #define __XFS_DINODE_H__ -struct xfs_buf; -struct xfs_mount; - #define XFS_DINODE_VERSION_1 1 #define XFS_DINODE_VERSION_2 2 #define XFS_DINODE_GOOD_VERSION(v) \ (((v) == XFS_DINODE_VERSION_1 || (v) == XFS_DINODE_VERSION_2)) #define XFS_DINODE_MAGIC 0x494e /* 'IN' */ -/* - * Disk inode structure. - * This is just the header; the inode is expanded to fill a variable size - * with the last field expanding. It is split into the core and "other" - * because we only need the core part in the in-core inode. - */ typedef struct xfs_timestamp { __be32 t_sec; /* timestamp seconds */ __be32 t_nsec; /* timestamp nanoseconds */ } xfs_timestamp_t; /* - * Note: Coordinate changes to this structure with the XFS_DI_* #defines - * below, the offsets table in xfs_ialloc_log_di() and struct xfs_icdinode - * in xfs_inode.h. + * On-disk inode structure. + * + * This is just the header or "dinode core", the inode is expanded to fill a + * variable size the leftover area split into a data and an attribute fork. + * The format of the data and attribute fork depends on the format of the + * inode as indicated by di_format and di_aformat. To access the data and + * attribute use the XFS_DFORK_PTR, XFS_DFORK_DPTR, and XFS_DFORK_PTR macros + * below. + * + * There is a very similar struct icdinode in xfs_inode which matches the + * layout of the first 96 bytes of this structure, but is kept in native + * format instead of big endian. */ -typedef struct xfs_dinode_core { +typedef struct xfs_dinode { __be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */ __be16 di_mode; /* mode and type of file */ __u8 di_version; /* inode version */ @@ -69,33 +69,12 @@ typedef struct xfs_dinode_core { __be16 di_dmstate; /* DMIG state info */ __be16 di_flags; /* random flags, XFS_DIFLAG_... */ __be32 di_gen; /* generation number */ -} xfs_dinode_core_t; -#define DI_MAX_FLUSH 0xffff + /* di_next_unlinked is the only non-core field in the old dinode */ + __be32 di_next_unlinked;/* agi unlinked list ptr */ +} __attribute__((packed)) xfs_dinode_t; -typedef struct xfs_dinode -{ - xfs_dinode_core_t di_core; - /* - * In adding anything between the core and the union, be - * sure to update the macros like XFS_LITINO below. - */ - __be32 di_next_unlinked;/* agi unlinked list ptr */ - union { - xfs_bmdr_block_t di_bmbt; /* btree root block */ - xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */ - xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */ - char di_c[1]; /* local contents */ - __be32 di_dev; /* device for S_IFCHR/S_IFBLK */ - uuid_t di_muuid; /* mount point value */ - char di_symlink[1]; /* local symbolic link */ - } di_u; - union { - xfs_bmdr_block_t di_abmbt; /* btree root block */ - xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */ - xfs_attr_shortform_t di_attrsf; /* shortform attribute list */ - } di_a; -} xfs_dinode_t; +#define DI_MAX_FLUSH 0xffff /* * The 32 bit link count in the inode theoretically maxes out at UINT_MAX. @@ -108,14 +87,12 @@ typedef struct xfs_dinode /* * Values for di_format */ -typedef enum xfs_dinode_fmt -{ - XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */ - XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */ - /* LNK: di_symlink */ - XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */ - XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */ - XFS_DINODE_FMT_UUID /* MNT: di_uuid */ +typedef enum xfs_dinode_fmt { + XFS_DINODE_FMT_DEV, /* xfs_dev_t */ + XFS_DINODE_FMT_LOCAL, /* bulk data */ + XFS_DINODE_FMT_EXTENTS, /* struct xfs_bmbt_rec */ + XFS_DINODE_FMT_BTREE, /* struct xfs_bmdr_block */ + XFS_DINODE_FMT_UUID /* uuid_t */ } xfs_dinode_fmt_t; /* @@ -136,8 +113,8 @@ typedef enum xfs_dinode_fmt /* * Inode data & attribute fork sizes, per inode. */ -#define XFS_DFORK_Q(dip) ((dip)->di_core.di_forkoff != 0) -#define XFS_DFORK_BOFF(dip) ((int)((dip)->di_core.di_forkoff << 3)) +#define XFS_DFORK_Q(dip) ((dip)->di_forkoff != 0) +#define XFS_DFORK_BOFF(dip) ((int)((dip)->di_forkoff << 3)) #define XFS_DFORK_DSIZE(dip,mp) \ (XFS_DFORK_Q(dip) ? \ @@ -152,22 +129,41 @@ typedef enum xfs_dinode_fmt XFS_DFORK_DSIZE(dip, mp) : \ XFS_DFORK_ASIZE(dip, mp)) -#define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c) +/* + * Return pointers to the data or attribute forks. + */ +#define XFS_DFORK_DPTR(dip) \ + ((char *)(dip) + sizeof(struct xfs_dinode)) #define XFS_DFORK_APTR(dip) \ - ((dip)->di_u.di_c + XFS_DFORK_BOFF(dip)) + (XFS_DFORK_DPTR(dip) + XFS_DFORK_BOFF(dip)) #define XFS_DFORK_PTR(dip,w) \ ((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip)) + #define XFS_DFORK_FORMAT(dip,w) \ ((w) == XFS_DATA_FORK ? \ - (dip)->di_core.di_format : \ - (dip)->di_core.di_aformat) + (dip)->di_format : \ + (dip)->di_aformat) #define XFS_DFORK_NEXTENTS(dip,w) \ ((w) == XFS_DATA_FORK ? \ - be32_to_cpu((dip)->di_core.di_nextents) : \ - be16_to_cpu((dip)->di_core.di_anextents)) + be32_to_cpu((dip)->di_nextents) : \ + be16_to_cpu((dip)->di_anextents)) #define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp)) +/* + * For block and character special files the 32bit dev_t is stored at the + * beginning of the data fork. + */ +static inline xfs_dev_t xfs_dinode_get_rdev(struct xfs_dinode *dip) +{ + return be32_to_cpu(*(__be32 *)XFS_DFORK_DPTR(dip)); +} + +static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) +{ + *(__be32 *)XFS_DFORK_DPTR(dip) = cpu_to_be32(rdev); +} + /* * Values for di_flags * There should be a one-to-one correspondence between these flags and the diff --git a/fs/xfs/xfs_dir2_sf.h b/fs/xfs/xfs_dir2_sf.h index deecc9d238f..6ac44b550d3 100644 --- a/fs/xfs/xfs_dir2_sf.h +++ b/fs/xfs/xfs_dir2_sf.h @@ -33,13 +33,6 @@ struct xfs_inode; struct xfs_mount; struct xfs_trans; -/* - * Maximum size of a shortform directory. - */ -#define XFS_DIR2_SF_MAX_SIZE \ - (XFS_DINODE_MAX_SIZE - (uint)sizeof(xfs_dinode_core_t) - \ - (uint)sizeof(xfs_agino_t)) - /* * Inode number stored as 8 8-bit values. */ diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 86d463ee7b9..47e94288fcb 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -355,12 +355,12 @@ xfs_ialloc_ag_alloc( xfs_biozero(fbuf, 0, ninodes << args.mp->m_sb.sb_inodelog); for (i = 0; i < ninodes; i++) { int ioffset = i << args.mp->m_sb.sb_inodelog; - uint isize = sizeof(xfs_dinode_t) + sizeof(__be32); + uint isize = sizeof(struct xfs_dinode); free = XFS_MAKE_IPTR(args.mp, fbuf, i); - free->di_core.di_magic = cpu_to_be16(XFS_DINODE_MAGIC); - free->di_core.di_version = version; - free->di_core.di_gen = cpu_to_be32(gen); + free->di_magic = cpu_to_be16(XFS_DINODE_MAGIC); + free->di_version = version; + free->di_gen = cpu_to_be32(gen); free->di_next_unlinked = cpu_to_be32(NULLAGINO); xfs_trans_log_buf(tp, fbuf, ioffset, ioffset + isize - 1); } diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 46b0526acd4..1d2912dc522 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -174,8 +174,8 @@ xfs_imap_to_bp( dip = (xfs_dinode_t *)xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog)); - di_ok = be16_to_cpu(dip->di_core.di_magic) == XFS_DINODE_MAGIC && - XFS_DINODE_GOOD_VERSION(dip->di_core.di_version); + di_ok = be16_to_cpu(dip->di_magic) == XFS_DINODE_MAGIC && + XFS_DINODE_GOOD_VERSION(dip->di_version); if (unlikely(XFS_TEST_ERROR(!di_ok, mp, XFS_ERRTAG_ITOBP_INOTOBP, XFS_RANDOM_ITOBP_INOTOBP))) { @@ -191,7 +191,7 @@ xfs_imap_to_bp( "daddr %lld #%d (magic=%x)", XFS_BUFTARG_NAME(mp->m_ddev_targp), (unsigned long long)imap->im_blkno, i, - be16_to_cpu(dip->di_core.di_magic)); + be16_to_cpu(dip->di_magic)); #endif xfs_trans_brelse(tp, bp); return XFS_ERROR(EFSCORRUPTED); @@ -350,26 +350,26 @@ xfs_iformat( XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); error = 0; - if (unlikely(be32_to_cpu(dip->di_core.di_nextents) + - be16_to_cpu(dip->di_core.di_anextents) > - be64_to_cpu(dip->di_core.di_nblocks))) { + if (unlikely(be32_to_cpu(dip->di_nextents) + + be16_to_cpu(dip->di_anextents) > + be64_to_cpu(dip->di_nblocks))) { xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, "corrupt dinode %Lu, extent total = %d, nblocks = %Lu.", (unsigned long long)ip->i_ino, - (int)(be32_to_cpu(dip->di_core.di_nextents) + - be16_to_cpu(dip->di_core.di_anextents)), + (int)(be32_to_cpu(dip->di_nextents) + + be16_to_cpu(dip->di_anextents)), (unsigned long long) - be64_to_cpu(dip->di_core.di_nblocks)); + be64_to_cpu(dip->di_nblocks)); XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW, ip->i_mount, dip); return XFS_ERROR(EFSCORRUPTED); } - if (unlikely(dip->di_core.di_forkoff > ip->i_mount->m_sb.sb_inodesize)) { + if (unlikely(dip->di_forkoff > ip->i_mount->m_sb.sb_inodesize)) { xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, "corrupt dinode %Lu, forkoff = 0x%x.", (unsigned long long)ip->i_ino, - dip->di_core.di_forkoff); + dip->di_forkoff); XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW, ip->i_mount, dip); return XFS_ERROR(EFSCORRUPTED); @@ -380,25 +380,25 @@ xfs_iformat( case S_IFCHR: case S_IFBLK: case S_IFSOCK: - if (unlikely(dip->di_core.di_format != XFS_DINODE_FMT_DEV)) { + if (unlikely(dip->di_format != XFS_DINODE_FMT_DEV)) { XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW, ip->i_mount, dip); return XFS_ERROR(EFSCORRUPTED); } ip->i_d.di_size = 0; ip->i_size = 0; - ip->i_df.if_u2.if_rdev = be32_to_cpu(dip->di_u.di_dev); + ip->i_df.if_u2.if_rdev = xfs_dinode_get_rdev(dip); break; case S_IFREG: case S_IFLNK: case S_IFDIR: - switch (dip->di_core.di_format) { + switch (dip->di_format) { case XFS_DINODE_FMT_LOCAL: /* * no local regular files yet */ - if (unlikely((be16_to_cpu(dip->di_core.di_mode) & S_IFMT) == S_IFREG)) { + if (unlikely((be16_to_cpu(dip->di_mode) & S_IFMT) == S_IFREG)) { xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, "corrupt inode %Lu " "(local format for regular file).", @@ -409,7 +409,7 @@ xfs_iformat( return XFS_ERROR(EFSCORRUPTED); } - di_size = be64_to_cpu(dip->di_core.di_size); + di_size = be64_to_cpu(dip->di_size); if (unlikely(di_size > XFS_DFORK_DSIZE(dip, ip->i_mount))) { xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, "corrupt inode %Lu " @@ -451,7 +451,7 @@ xfs_iformat( ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); ip->i_afp->if_ext_max = XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); - switch (dip->di_core.di_aformat) { + switch (dip->di_aformat) { case XFS_DINODE_FMT_LOCAL: atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip); size = be16_to_cpu(atp->hdr.totsize); @@ -663,7 +663,7 @@ xfs_iformat_btree( void xfs_dinode_from_disk( xfs_icdinode_t *to, - xfs_dinode_core_t *from) + xfs_dinode_t *from) { to->di_magic = be16_to_cpu(from->di_magic); to->di_mode = be16_to_cpu(from->di_mode); @@ -697,7 +697,7 @@ xfs_dinode_from_disk( void xfs_dinode_to_disk( - xfs_dinode_core_t *to, + xfs_dinode_t *to, xfs_icdinode_t *from) { to->di_magic = cpu_to_be16(from->di_magic); @@ -784,9 +784,7 @@ uint xfs_dic2xflags( xfs_dinode_t *dip) { - xfs_dinode_core_t *dic = &dip->di_core; - - return _xfs_dic2xflags(be16_to_cpu(dic->di_flags)) | + return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) | (XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0); } @@ -905,12 +903,12 @@ xfs_iread( * If we got something that isn't an inode it means someone * (nfs or dmi) has a stale handle. */ - if (be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC) { + if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC) { #ifdef DEBUG xfs_fs_cmn_err(CE_ALERT, mp, "xfs_iread: " - "dip->di_core.di_magic (0x%x) != " + "dip->di_magic (0x%x) != " "XFS_DINODE_MAGIC (0x%x)", - be16_to_cpu(dip->di_core.di_magic), + be16_to_cpu(dip->di_magic), XFS_DINODE_MAGIC); #endif /* DEBUG */ error = XFS_ERROR(EINVAL); @@ -924,8 +922,8 @@ xfs_iread( * specific information. * Otherwise, just get the truly permanent information. */ - if (dip->di_core.di_mode) { - xfs_dinode_from_disk(&ip->i_d, &dip->di_core); + if (dip->di_mode) { + xfs_dinode_from_disk(&ip->i_d, dip); error = xfs_iformat(ip, dip); if (error) { #ifdef DEBUG @@ -936,10 +934,10 @@ xfs_iread( goto out_brelse; } } else { - ip->i_d.di_magic = be16_to_cpu(dip->di_core.di_magic); - ip->i_d.di_version = dip->di_core.di_version; - ip->i_d.di_gen = be32_to_cpu(dip->di_core.di_gen); - ip->i_d.di_flushiter = be16_to_cpu(dip->di_core.di_flushiter); + ip->i_d.di_magic = be16_to_cpu(dip->di_magic); + ip->i_d.di_version = dip->di_version; + ip->i_d.di_gen = be32_to_cpu(dip->di_gen); + ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter); /* * Make sure to pull in the mode here as well in * case the inode is released without being used. @@ -2295,7 +2293,7 @@ xfs_ifree( * This is a temporary hack that would require a proper fix * in the future. */ - dip->di_core.di_mode = 0; + dip->di_mode = 0; if (delete) { xfs_ifree_cluster(ip, tp, first_ino); @@ -2909,15 +2907,16 @@ xfs_iflush_fork( case XFS_DINODE_FMT_DEV: if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) { ASSERT(whichfork == XFS_DATA_FORK); - dip->di_u.di_dev = cpu_to_be32(ip->i_df.if_u2.if_rdev); + xfs_dinode_put_rdev(dip, ip->i_df.if_u2.if_rdev); } break; case XFS_DINODE_FMT_UUID: if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) { ASSERT(whichfork == XFS_DATA_FORK); - memcpy(&dip->di_u.di_muuid, &ip->i_df.if_u2.if_uuid, - sizeof(uuid_t)); + memcpy(XFS_DFORK_DPTR(dip), + &ip->i_df.if_u2.if_uuid, + sizeof(uuid_t)); } break; @@ -3295,11 +3294,11 @@ xfs_iflush_int( */ xfs_synchronize_atime(ip); - if (XFS_TEST_ERROR(be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC, + if (XFS_TEST_ERROR(be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC, mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) { xfs_cmn_err(XFS_PTAG_IFLUSH, CE_ALERT, mp, "xfs_iflush: Bad inode %Lu magic number 0x%x, ptr 0x%p", - ip->i_ino, be16_to_cpu(dip->di_core.di_magic), dip); + ip->i_ino, be16_to_cpu(dip->di_magic), dip); goto corrupt_out; } if (XFS_TEST_ERROR(ip->i_d.di_magic != XFS_DINODE_MAGIC, @@ -3362,7 +3361,7 @@ xfs_iflush_int( * because if the inode is dirty at all the core must * be. */ - xfs_dinode_to_disk(&dip->di_core, &ip->i_d); + xfs_dinode_to_disk(dip, &ip->i_d); /* Wrap, we never let the log put out DI_MAX_FLUSH */ if (ip->i_d.di_flushiter == DI_MAX_FLUSH) @@ -3382,7 +3381,7 @@ xfs_iflush_int( * Convert it back. */ ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1); - dip->di_core.di_onlink = cpu_to_be16(ip->i_d.di_nlink); + dip->di_onlink = cpu_to_be16(ip->i_d.di_nlink); } else { /* * The superblock version has already been bumped, @@ -3390,12 +3389,12 @@ xfs_iflush_int( * format permanent. */ ip->i_d.di_version = XFS_DINODE_VERSION_2; - dip->di_core.di_version = XFS_DINODE_VERSION_2; + dip->di_version = XFS_DINODE_VERSION_2; ip->i_d.di_onlink = 0; - dip->di_core.di_onlink = 0; + dip->di_onlink = 0; memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); - memset(&(dip->di_core.di_pad[0]), 0, - sizeof(dip->di_core.di_pad)); + memset(&(dip->di_pad[0]), 0, + sizeof(dip->di_pad)); ASSERT(ip->i_d.di_projid == 0); } } diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index ea691c738f2..705083a8ffa 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -19,7 +19,6 @@ #define __XFS_INODE_H__ struct xfs_dinode; -struct xfs_dinode_core; struct xfs_inode; /* @@ -112,7 +111,7 @@ typedef struct xfs_ictimestamp { } xfs_ictimestamp_t; /* - * NOTE: This structure must be kept identical to struct xfs_dinode_core + * NOTE: This structure must be kept identical to struct xfs_dinode * in xfs_dinode.h except for the endianess annotations. */ typedef struct xfs_icdinode { @@ -553,8 +552,8 @@ int xfs_itobp(struct xfs_mount *, struct xfs_trans *, struct xfs_inode *, struct xfs_dinode **, struct xfs_buf **, xfs_daddr_t, uint, uint); void xfs_dinode_from_disk(struct xfs_icdinode *, - struct xfs_dinode_core *); -void xfs_dinode_to_disk(struct xfs_dinode_core *, + struct xfs_dinode *); +void xfs_dinode_to_disk(struct xfs_dinode *, struct xfs_icdinode *); void xfs_idestroy_fork(struct xfs_inode *, int); void xfs_idata_realloc(struct xfs_inode *, int, int); diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index aa9bf05060c..27f18c15e16 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -281,7 +281,7 @@ xfs_inode_item_format( xfs_mark_inode_dirty_sync(ip); vecp->i_addr = (xfs_caddr_t)&ip->i_d; - vecp->i_len = sizeof(xfs_dinode_core_t); + vecp->i_len = sizeof(struct xfs_icdinode); XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ICORE); vecp++; nvecs++; diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 35118032a5d..b3578cdc33d 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -125,13 +125,9 @@ STATIC void xfs_bulkstat_one_dinode( xfs_mount_t *mp, /* mount point for filesystem */ xfs_ino_t ino, /* inode number to get data for */ - xfs_dinode_t *dip, /* dinode inode pointer */ + xfs_dinode_t *dic, /* dinode inode pointer */ xfs_bstat_t *buf) /* return buffer */ { - xfs_dinode_core_t *dic; /* dinode core info pointer */ - - dic = &dip->di_core; - /* * The inode format changed when we moved the link count and * made it 32 bits long. If this is an old format inode, @@ -162,7 +158,7 @@ xfs_bulkstat_one_dinode( buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec); buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec); buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec); - buf->bs_xflags = xfs_dic2xflags(dip); + buf->bs_xflags = xfs_dic2xflags(dic); buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog; buf->bs_extents = be32_to_cpu(dic->di_nextents); buf->bs_gen = be32_to_cpu(dic->di_gen); @@ -173,7 +169,7 @@ xfs_bulkstat_one_dinode( switch (dic->di_format) { case XFS_DINODE_FMT_DEV: - buf->bs_rdev = be32_to_cpu(dip->di_u.di_dev); + buf->bs_rdev = xfs_dinode_get_rdev(dic); buf->bs_blksize = BLKDEV_IOSIZE; buf->bs_blocks = 0; break; @@ -287,19 +283,19 @@ xfs_bulkstat_use_dinode( * to disk yet. This is a temporary hack that would require a proper * fix in the future. */ - if (be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC || - !XFS_DINODE_GOOD_VERSION(dip->di_core.di_version) || - !dip->di_core.di_mode) + if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC || + !XFS_DINODE_GOOD_VERSION(dip->di_version) || + !dip->di_mode) return 0; if (flags & BULKSTAT_FG_QUICK) { *dipp = dip; return 1; } /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */ - aformat = dip->di_core.di_aformat; + aformat = dip->di_aformat; if ((XFS_DFORK_Q(dip) == 0) || (aformat == XFS_DINODE_FMT_LOCAL) || - (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_core.di_anextents)) { + (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_anextents)) { *dipp = dip; return 1; } diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 9abb96a7674..4099618f5fa 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2320,7 +2320,7 @@ xlog_recover_do_inode_trans( * Make sure the place we're flushing out to really looks * like an inode! */ - if (unlikely(be16_to_cpu(dip->di_core.di_magic) != XFS_DINODE_MAGIC)) { + if (unlikely(be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC)) { xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode magic number, dino ptr = 0x%p, dino bp = 0x%p, ino = %Ld", @@ -2343,12 +2343,12 @@ xlog_recover_do_inode_trans( } /* Skip replay when the on disk inode is newer than the log one */ - if (dicp->di_flushiter < be16_to_cpu(dip->di_core.di_flushiter)) { + if (dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { /* * Deal with the wrap case, DI_MAX_FLUSH is less * than smaller numbers */ - if (be16_to_cpu(dip->di_core.di_flushiter) == DI_MAX_FLUSH && + if (be16_to_cpu(dip->di_flushiter) == DI_MAX_FLUSH && dicp->di_flushiter < (DI_MAX_FLUSH >> 1)) { /* do nothing */ } else { @@ -2408,7 +2408,7 @@ xlog_recover_do_inode_trans( error = EFSCORRUPTED; goto error; } - if (unlikely(item->ri_buf[1].i_len > sizeof(xfs_dinode_core_t))) { + if (unlikely(item->ri_buf[1].i_len > sizeof(struct xfs_icdinode))) { XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(7)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); @@ -2420,23 +2420,24 @@ xlog_recover_do_inode_trans( } /* The core is in in-core format */ - xfs_dinode_to_disk(&dip->di_core, - (xfs_icdinode_t *)item->ri_buf[1].i_addr); + xfs_dinode_to_disk(dip, (xfs_icdinode_t *)item->ri_buf[1].i_addr); /* the rest is in on-disk format */ - if (item->ri_buf[1].i_len > sizeof(xfs_dinode_core_t)) { - memcpy((xfs_caddr_t) dip + sizeof(xfs_dinode_core_t), - item->ri_buf[1].i_addr + sizeof(xfs_dinode_core_t), - item->ri_buf[1].i_len - sizeof(xfs_dinode_core_t)); + if (item->ri_buf[1].i_len > sizeof(struct xfs_icdinode)) { + memcpy((xfs_caddr_t) dip + sizeof(struct xfs_icdinode), + item->ri_buf[1].i_addr + sizeof(struct xfs_icdinode), + item->ri_buf[1].i_len - sizeof(struct xfs_icdinode)); } fields = in_f->ilf_fields; switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) { case XFS_ILOG_DEV: - dip->di_u.di_dev = cpu_to_be32(in_f->ilf_u.ilfu_rdev); + xfs_dinode_put_rdev(dip, in_f->ilf_u.ilfu_rdev); break; case XFS_ILOG_UUID: - dip->di_u.di_muuid = in_f->ilf_u.ilfu_uuid; + memcpy(XFS_DFORK_DPTR(dip), + &in_f->ilf_u.ilfu_uuid, + sizeof(uuid_t)); break; } @@ -2452,12 +2453,12 @@ xlog_recover_do_inode_trans( switch (fields & XFS_ILOG_DFORK) { case XFS_ILOG_DDATA: case XFS_ILOG_DEXT: - memcpy(&dip->di_u, src, len); + memcpy(XFS_DFORK_DPTR(dip), src, len); break; case XFS_ILOG_DBROOT: xfs_bmbt_to_bmdr(mp, (struct xfs_btree_block *)src, len, - &dip->di_u.di_bmbt, + (xfs_bmdr_block_t *)XFS_DFORK_DPTR(dip), XFS_DFORK_DSIZE(dip, mp)); break; diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 177976dfea0..3f999b1c038 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -575,8 +575,7 @@ xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp) mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT; mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1; mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog; - mp->m_litino = sbp->sb_inodesize - - ((uint)sizeof(xfs_dinode_core_t) + (uint)sizeof(xfs_agino_t)); + mp->m_litino = sbp->sb_inodesize - sizeof(struct xfs_dinode); mp->m_blockmask = sbp->sb_blocksize - 1; mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG; mp->m_blockwmask = mp->m_blockwsize - 1; -- cgit v1.2.3-70-g09d2 From 51ce16d519da0bc3c548e0facef7cb3aab1ac8cc Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:39 +1100 Subject: [XFS] kill XFS_DINODE_VERSION_ defines These names don't add any value at all over just using the numerical values. (First sent on October 9th) Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/linux-2.6/xfs_ioctl.c | 2 +- fs/xfs/xfs_dinode.h | 7 ++----- fs/xfs/xfs_ialloc.c | 4 ++-- fs/xfs/xfs_inode.c | 17 ++++++++--------- fs/xfs/xfs_inode_item.c | 7 +++---- fs/xfs/xfs_itable.c | 2 +- fs/xfs/xfs_utils.c | 6 +++--- 7 files changed, 20 insertions(+), 25 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index d5970599953..534b175f3a4 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -1131,7 +1131,7 @@ xfs_ioctl_setattr( * the superblock version number since projids didn't * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. */ - if (ip->i_d.di_version == XFS_DINODE_VERSION_1) + if (ip->i_d.di_version == 1) xfs_bump_ino_vers2(tp, ip); } diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h index 0b7ebf922af..162e8726df5 100644 --- a/fs/xfs/xfs_dinode.h +++ b/fs/xfs/xfs_dinode.h @@ -18,11 +18,8 @@ #ifndef __XFS_DINODE_H__ #define __XFS_DINODE_H__ -#define XFS_DINODE_VERSION_1 1 -#define XFS_DINODE_VERSION_2 2 -#define XFS_DINODE_GOOD_VERSION(v) \ - (((v) == XFS_DINODE_VERSION_1 || (v) == XFS_DINODE_VERSION_2)) -#define XFS_DINODE_MAGIC 0x494e /* 'IN' */ +#define XFS_DINODE_MAGIC 0x494e /* 'IN' */ +#define XFS_DINODE_GOOD_VERSION(v) (((v) == 1 || (v) == 2)) typedef struct xfs_timestamp { __be32 t_sec; /* timestamp seconds */ diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 47e94288fcb..16eda31fe79 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -321,9 +321,9 @@ xfs_ialloc_ag_alloc( * able to use the file system. */ if (xfs_sb_version_hasnlink(&args.mp->m_sb)) - version = XFS_DINODE_VERSION_2; + version = 2; else - version = XFS_DINODE_VERSION_1; + version = 1; /* * Seed the new inode cluster with a random generation number. This diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 1d2912dc522..083395cd675 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -965,7 +965,7 @@ xfs_iread( * the new format. We don't change the version number so that we * can distinguish this from a real new format inode. */ - if (ip->i_d.di_version == XFS_DINODE_VERSION_1) { + if (ip->i_d.di_version == 1) { ip->i_d.di_nlink = ip->i_d.di_onlink; ip->i_d.di_onlink = 0; ip->i_d.di_projid = 0; @@ -1139,8 +1139,8 @@ xfs_ialloc( * here rather than here and in the flush/logging code. */ if (xfs_sb_version_hasnlink(&tp->t_mountp->m_sb) && - ip->i_d.di_version == XFS_DINODE_VERSION_1) { - ip->i_d.di_version = XFS_DINODE_VERSION_2; + ip->i_d.di_version == 1) { + ip->i_d.di_version = 2; /* * We've already zeroed the old link count, the projid field, * and the pad field. @@ -1150,7 +1150,7 @@ xfs_ialloc( /* * Project ids won't be stored on disk if we are using a version 1 inode. */ - if ((prid != 0) && (ip->i_d.di_version == XFS_DINODE_VERSION_1)) + if ((prid != 0) && (ip->i_d.di_version == 1)) xfs_bump_ino_vers2(tp, ip); if (pip && XFS_INHERIT_GID(pip)) { @@ -3373,9 +3373,8 @@ xfs_iflush_int( * convert back to the old inode format. If the superblock version * has been updated, then make the conversion permanent. */ - ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1 || - xfs_sb_version_hasnlink(&mp->m_sb)); - if (ip->i_d.di_version == XFS_DINODE_VERSION_1) { + ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb)); + if (ip->i_d.di_version == 1) { if (!xfs_sb_version_hasnlink(&mp->m_sb)) { /* * Convert it back. @@ -3388,8 +3387,8 @@ xfs_iflush_int( * so just make the conversion to the new inode * format permanent. */ - ip->i_d.di_version = XFS_DINODE_VERSION_2; - dip->di_version = XFS_DINODE_VERSION_2; + ip->i_d.di_version = 2; + dip->di_version = 2; ip->i_d.di_onlink = 0; dip->di_onlink = 0; memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 27f18c15e16..c43118148e6 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -296,9 +296,8 @@ xfs_inode_item_format( * has a new version number, then we don't bother converting back. */ mp = ip->i_mount; - ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1 || - xfs_sb_version_hasnlink(&mp->m_sb)); - if (ip->i_d.di_version == XFS_DINODE_VERSION_1) { + ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb)); + if (ip->i_d.di_version == 1) { if (!xfs_sb_version_hasnlink(&mp->m_sb)) { /* * Convert it back. @@ -311,7 +310,7 @@ xfs_inode_item_format( * so just make the conversion to the new inode * format permanent. */ - ip->i_d.di_version = XFS_DINODE_VERSION_2; + ip->i_d.di_version = 2; ip->i_d.di_onlink = 0; memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); } diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index b3578cdc33d..2cf16f4695e 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -139,7 +139,7 @@ xfs_bulkstat_one_dinode( * the new format. We don't change the version number so that we * can distinguish this from a real new format inode. */ - if (dic->di_version == XFS_DINODE_VERSION_1) { + if (dic->di_version == 1) { buf->bs_nlink = be16_to_cpu(dic->di_onlink); buf->bs_projid = 0; } else { diff --git a/fs/xfs/xfs_utils.c b/fs/xfs/xfs_utils.c index 771144932ab..fcc2285d03e 100644 --- a/fs/xfs/xfs_utils.c +++ b/fs/xfs/xfs_utils.c @@ -274,9 +274,9 @@ xfs_bump_ino_vers2( xfs_mount_t *mp; ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); - ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1); + ASSERT(ip->i_d.di_version == 1); - ip->i_d.di_version = XFS_DINODE_VERSION_2; + ip->i_d.di_version = 2; ip->i_d.di_onlink = 0; memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); mp = tp->t_mountp; @@ -308,7 +308,7 @@ xfs_bumplink( ASSERT(ip->i_d.di_nlink > 0); ip->i_d.di_nlink++; inc_nlink(VFS_I(ip)); - if ((ip->i_d.di_version == XFS_DINODE_VERSION_1) && + if ((ip->i_d.di_version == 1) && (ip->i_d.di_nlink > XFS_MAXLINK_1)) { /* * The inode has increased its number of links beyond -- cgit v1.2.3-70-g09d2 From a1941895034cda2bffa23ba845607c82138ccf52 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:40 +1100 Subject: [XFS] remove dead code for old inode item recovery We have removed the support for old-style inode items a while ago and xlog_recover_do_inode_trans is now only called for XFS_LI_INODE items. That means we can remove the call to xfs_imap there and with it the XFS_IMAP_LOOKUP that is set by all other callers. We can also mark xfs_imap static now. (First sent on October 21st) Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_ialloc.c | 3 +-- fs/xfs/xfs_inode.c | 5 ++--- fs/xfs/xfs_inode.h | 3 +-- fs/xfs/xfs_log_recover.c | 32 ++++++-------------------------- 4 files changed, 10 insertions(+), 33 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 16eda31fe79..0ce56d6a492 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -1262,8 +1262,7 @@ xfs_dilocate( #endif /* DEBUG */ return XFS_ERROR(EINVAL); } - if ((mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) || - !(flags & XFS_IMAP_LOOKUP)) { + if ((mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp))) { offset = XFS_INO_TO_OFFSET(mp, ino); ASSERT(offset < mp->m_sb.sb_inopblock); *bno = XFS_AGB_TO_FSB(mp, agno, agbno); diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 1d5c28b144a..663ff9e517f 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -237,7 +237,7 @@ xfs_inotobp( int error; imap.im_blkno = 0; - error = xfs_imap(mp, tp, ino, &imap, imap_flags | XFS_IMAP_LOOKUP); + error = xfs_imap(mp, tp, ino, &imap, imap_flags); if (error) return error; @@ -868,8 +868,7 @@ xfs_iread( * Get pointers to the on-disk inode and the buffer containing it. */ imap.im_blkno = bno; - error = xfs_imap(mp, tp, ip->i_ino, &imap, - XFS_IMAP_LOOKUP | imap_flags); + error = xfs_imap(mp, tp, ip->i_ino, &imap, imap_flags); if (error) goto out_destroy_inode; diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index ec8b539439d..db1f6884072 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -159,8 +159,7 @@ typedef struct xfs_icdinode { /* * Flags for xfs_inotobp, xfs_imap() and xfs_dilocate(). */ -#define XFS_IMAP_LOOKUP 0x1 -#define XFS_IMAP_BULKSTAT 0x2 +#define XFS_IMAP_BULKSTAT 0x1 /* * Fork handling. diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 48bdfa4dc29..bf8573b5a7d 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2245,7 +2245,6 @@ xlog_recover_do_inode_trans( xfs_inode_log_format_t *in_f; xfs_mount_t *mp; xfs_buf_t *bp; - xfs_imap_t imap; xfs_dinode_t *dip; xfs_ino_t ino; int len; @@ -2273,48 +2272,29 @@ xlog_recover_do_inode_trans( } ino = in_f->ilf_ino; mp = log->l_mp; - if (ITEM_TYPE(item) == XFS_LI_INODE) { - imap.im_blkno = (xfs_daddr_t)in_f->ilf_blkno; - imap.im_len = in_f->ilf_len; - imap.im_boffset = in_f->ilf_boffset; - } else { - /* - * It's an old inode format record. We don't know where - * its cluster is located on disk, and we can't allow - * xfs_imap() to figure it out because the inode btrees - * are not ready to be used. Therefore do not pass the - * XFS_IMAP_LOOKUP flag to xfs_imap(). This will give - * us only the single block in which the inode lives - * rather than its cluster, so we must make sure to - * invalidate the buffer when we write it out below. - */ - imap.im_blkno = 0; - error = xfs_imap(log->l_mp, NULL, ino, &imap, 0); - if (error) - goto error; - } /* * Inode buffers can be freed, look out for it, * and do not replay the inode. */ - if (xlog_check_buffer_cancelled(log, imap.im_blkno, imap.im_len, 0)) { + if (xlog_check_buffer_cancelled(log, in_f->ilf_blkno, + in_f->ilf_len, 0)) { error = 0; goto error; } - bp = xfs_buf_read_flags(mp->m_ddev_targp, imap.im_blkno, imap.im_len, - XFS_BUF_LOCK); + bp = xfs_buf_read_flags(mp->m_ddev_targp, in_f->ilf_blkno, + in_f->ilf_len, XFS_BUF_LOCK); if (XFS_BUF_ISERROR(bp)) { xfs_ioerror_alert("xlog_recover_do..(read#2)", mp, - bp, imap.im_blkno); + bp, in_f->ilf_blkno); error = XFS_BUF_GETERROR(bp); xfs_buf_relse(bp); goto error; } error = 0; ASSERT(in_f->ilf_fields & XFS_ILOG_CORE); - dip = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); + dip = (xfs_dinode_t *)xfs_buf_offset(bp, in_f->ilf_boffset); /* * Make sure the place we're flushing out to really looks -- cgit v1.2.3-70-g09d2 From 94e1b69d1abd108d306e926c3012ec89e481c0da Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:41 +1100 Subject: [XFS] merge xfs_imap into xfs_dilocate xfs_imap is the only caller of xfs_dilocate and doesn't add any significant value. Merge the two functions and document the various cases we have for inode cluster lookup in the new xfs_imap. Also remove the unused im_agblkno and im_ioffset fields from struct xfs_imap while we're at it. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_ialloc.c | 129 +++++++++++++++++++++++++++++++++------------------- fs/xfs/xfs_ialloc.h | 10 ++-- fs/xfs/xfs_imap.h | 7 --- fs/xfs/xfs_inode.c | 60 +----------------------- fs/xfs/xfs_inode.h | 2 +- 5 files changed, 88 insertions(+), 120 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 0ce56d6a492..348ac30174c 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -40,6 +40,7 @@ #include "xfs_rtalloc.h" #include "xfs_error.h" #include "xfs_bmap.h" +#include "xfs_imap.h" /* @@ -1196,36 +1197,28 @@ error0: } /* - * Return the location of the inode in bno/off, for mapping it into a buffer. + * Return the location of the inode in imap, for mapping it into a buffer. */ -/*ARGSUSED*/ int -xfs_dilocate( - xfs_mount_t *mp, /* file system mount structure */ - xfs_trans_t *tp, /* transaction pointer */ +xfs_imap( + xfs_mount_t *mp, /* file system mount structure */ + xfs_trans_t *tp, /* transaction pointer */ xfs_ino_t ino, /* inode to locate */ - xfs_fsblock_t *bno, /* output: block containing inode */ - int *len, /* output: num blocks in inode cluster */ - int *off, /* output: index in block of inode */ - uint flags) /* flags concerning inode lookup */ + struct xfs_imap *imap, /* location map structure */ + uint flags) /* flags for inode btree lookup */ { xfs_agblock_t agbno; /* block number of inode in the alloc group */ - xfs_buf_t *agbp; /* agi buffer */ xfs_agino_t agino; /* inode number within alloc group */ xfs_agnumber_t agno; /* allocation group number */ int blks_per_cluster; /* num blocks per inode cluster */ xfs_agblock_t chunk_agbno; /* first block in inode chunk */ - xfs_agino_t chunk_agino; /* first agino in inode chunk */ - __int32_t chunk_cnt; /* count of free inodes in chunk */ - xfs_inofree_t chunk_free; /* mask of free inodes in chunk */ xfs_agblock_t cluster_agbno; /* first block in inode cluster */ - xfs_btree_cur_t *cur; /* inode btree cursor */ int error; /* error code */ - int i; /* temp state */ int offset; /* index of inode in its buffer */ int offset_agbno; /* blks from chunk start to inode */ ASSERT(ino != NULLFSINO); + /* * Split up the inode number into its parts. */ @@ -1240,20 +1233,20 @@ xfs_dilocate( return XFS_ERROR(EINVAL); if (agno >= mp->m_sb.sb_agcount) { xfs_fs_cmn_err(CE_ALERT, mp, - "xfs_dilocate: agno (%d) >= " + "xfs_imap: agno (%d) >= " "mp->m_sb.sb_agcount (%d)", agno, mp->m_sb.sb_agcount); } if (agbno >= mp->m_sb.sb_agblocks) { xfs_fs_cmn_err(CE_ALERT, mp, - "xfs_dilocate: agbno (0x%llx) >= " + "xfs_imap: agbno (0x%llx) >= " "mp->m_sb.sb_agblocks (0x%lx)", (unsigned long long) agbno, (unsigned long) mp->m_sb.sb_agblocks); } if (ino != XFS_AGINO_TO_INO(mp, agno, agino)) { xfs_fs_cmn_err(CE_ALERT, mp, - "xfs_dilocate: ino (0x%llx) != " + "xfs_imap: ino (0x%llx) != " "XFS_AGINO_TO_INO(mp, agno, agino) " "(0x%llx)", ino, XFS_AGINO_TO_INO(mp, agno, agino)); @@ -1262,63 +1255,89 @@ xfs_dilocate( #endif /* DEBUG */ return XFS_ERROR(EINVAL); } - if ((mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp))) { + + /* + * If the inode cluster size is the same as the blocksize or + * smaller we get to the buffer by simple arithmetics. + */ + if (XFS_INODE_CLUSTER_SIZE(mp) <= mp->m_sb.sb_blocksize) { offset = XFS_INO_TO_OFFSET(mp, ino); ASSERT(offset < mp->m_sb.sb_inopblock); - *bno = XFS_AGB_TO_FSB(mp, agno, agbno); - *off = offset; - *len = 1; + + imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, agbno); + imap->im_len = XFS_FSB_TO_BB(mp, 1); + imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog); return 0; } + blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_blocklog; - if (*bno != NULLFSBLOCK) { + + /* + * If we get a block number passed from bulkstat we can use it to + * find the buffer easily. + */ + if (imap->im_blkno) { offset = XFS_INO_TO_OFFSET(mp, ino); ASSERT(offset < mp->m_sb.sb_inopblock); - cluster_agbno = XFS_FSB_TO_AGBNO(mp, *bno); - *off = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) + - offset; - *len = blks_per_cluster; + + cluster_agbno = XFS_DADDR_TO_AGBNO(mp, imap->im_blkno); + offset += (agbno - cluster_agbno) * mp->m_sb.sb_inopblock; + + imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster); + imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog); return 0; } + + /* + * If the inode chunks are aligned then use simple maths to + * find the location. Otherwise we have to do a btree + * lookup to find the location. + */ if (mp->m_inoalign_mask) { offset_agbno = agbno & mp->m_inoalign_mask; chunk_agbno = agbno - offset_agbno; } else { + xfs_btree_cur_t *cur; /* inode btree cursor */ + xfs_agino_t chunk_agino; /* first agino in inode chunk */ + __int32_t chunk_cnt; /* count of free inodes in chunk */ + xfs_inofree_t chunk_free; /* mask of free inodes in chunk */ + xfs_buf_t *agbp; /* agi buffer */ + int i; /* temp state */ + down_read(&mp->m_peraglock); error = xfs_ialloc_read_agi(mp, tp, agno, &agbp); up_read(&mp->m_peraglock); if (error) { -#ifdef DEBUG - xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: " + xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " "xfs_ialloc_read_agi() returned " "error %d, agno %d", error, agno); -#endif /* DEBUG */ return error; } + cur = xfs_inobt_init_cursor(mp, tp, agbp, agno); - if ((error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i))) { -#ifdef DEBUG - xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: " + error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i); + if (error) { + xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " "xfs_inobt_lookup_le() failed"); -#endif /* DEBUG */ goto error0; } - if ((error = xfs_inobt_get_rec(cur, &chunk_agino, &chunk_cnt, - &chunk_free, &i))) { -#ifdef DEBUG - xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: " + + error = xfs_inobt_get_rec(cur, &chunk_agino, &chunk_cnt, + &chunk_free, &i); + if (error) { + xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " "xfs_inobt_get_rec() failed"); -#endif /* DEBUG */ goto error0; } if (i == 0) { #ifdef DEBUG - xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: " + xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " "xfs_inobt_get_rec() failed"); #endif /* DEBUG */ error = XFS_ERROR(EINVAL); } + error0: xfs_trans_brelse(tp, agbp); xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); if (error) @@ -1326,19 +1345,35 @@ xfs_dilocate( chunk_agbno = XFS_AGINO_TO_AGBNO(mp, chunk_agino); offset_agbno = agbno - chunk_agbno; } + ASSERT(agbno >= chunk_agbno); cluster_agbno = chunk_agbno + ((offset_agbno / blks_per_cluster) * blks_per_cluster); offset = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) + XFS_INO_TO_OFFSET(mp, ino); - *bno = XFS_AGB_TO_FSB(mp, agno, cluster_agbno); - *off = offset; - *len = blks_per_cluster; + + imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, cluster_agbno); + imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster); + imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog); + + /* + * If the inode number maps to a block outside the bounds + * of the file system then return NULL rather than calling + * read_buf and panicing when we get an error from the + * driver. + */ + if ((imap->im_blkno + imap->im_len) > + XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) { + xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " + "(imap->im_blkno (0x%llx) + imap->im_len (0x%llx)) > " + " XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) (0x%llx)", + (unsigned long long) imap->im_blkno, + (unsigned long long) imap->im_len, + XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)); + return XFS_ERROR(EINVAL); + } + return 0; -error0: - xfs_trans_brelse(tp, agbp); - xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); - return error; } /* diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h index ccf554a6e0a..50f558a4e0a 100644 --- a/fs/xfs/xfs_ialloc.h +++ b/fs/xfs/xfs_ialloc.h @@ -20,6 +20,7 @@ struct xfs_buf; struct xfs_dinode; +struct xfs_imap; struct xfs_mount; struct xfs_trans; @@ -104,17 +105,14 @@ xfs_difree( xfs_ino_t *first_ino); /* first inode in deleted cluster */ /* - * Return the location of the inode in bno/len/off, - * for mapping it into a buffer. + * Return the location of the inode in imap, for mapping it into a buffer. */ int -xfs_dilocate( +xfs_imap( struct xfs_mount *mp, /* file system mount structure */ struct xfs_trans *tp, /* transaction pointer */ xfs_ino_t ino, /* inode to locate */ - xfs_fsblock_t *bno, /* output: block containing inode */ - int *len, /* output: num blocks in cluster*/ - int *off, /* output: index in block of inode */ + struct xfs_imap *imap, /* location map structure */ uint flags); /* flags for inode btree lookup */ /* diff --git a/fs/xfs/xfs_imap.h b/fs/xfs/xfs_imap.h index f9ce62890ea..08690005739 100644 --- a/fs/xfs/xfs_imap.h +++ b/fs/xfs/xfs_imap.h @@ -25,14 +25,7 @@ typedef struct xfs_imap { xfs_daddr_t im_blkno; /* starting BB of inode chunk */ uint im_len; /* length in BBs of inode chunk */ - xfs_agblock_t im_agblkno; /* logical block of inode chunk in ag */ - ushort im_ioffset; /* inode offset in block in "inodes" */ ushort im_boffset; /* inode offset in block in bytes */ } xfs_imap_t; -struct xfs_mount; -struct xfs_trans; -int xfs_imap(struct xfs_mount *, struct xfs_trans *, xfs_ino_t, - xfs_imap_t *, uint); - #endif /* __XFS_IMAP_H__ */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 663ff9e517f..bf528b725ae 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -266,7 +266,7 @@ xfs_inotobp( * in once, thus we can use the mapping information stored in the inode * rather than calling xfs_imap(). This allows us to avoid the overhead * of looking at the inode btree for small block file systems - * (see xfs_dilocate()). + * (see xfs_imap()). */ int xfs_itobp( @@ -2508,64 +2508,6 @@ xfs_idata_realloc( ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork)); } - - - -/* - * Map inode to disk block and offset. - * - * mp -- the mount point structure for the current file system - * tp -- the current transaction - * ino -- the inode number of the inode to be located - * imap -- this structure is filled in with the information necessary - * to retrieve the given inode from disk - * flags -- flags to pass to xfs_dilocate indicating whether or not - * lookups in the inode btree were OK or not - */ -int -xfs_imap( - xfs_mount_t *mp, - xfs_trans_t *tp, - xfs_ino_t ino, - xfs_imap_t *imap, - uint flags) -{ - xfs_fsblock_t fsbno; - int len; - int off; - int error; - - fsbno = imap->im_blkno ? - XFS_DADDR_TO_FSB(mp, imap->im_blkno) : NULLFSBLOCK; - error = xfs_dilocate(mp, tp, ino, &fsbno, &len, &off, flags); - if (error) - return error; - - imap->im_blkno = XFS_FSB_TO_DADDR(mp, fsbno); - imap->im_len = XFS_FSB_TO_BB(mp, len); - imap->im_agblkno = XFS_FSB_TO_AGBNO(mp, fsbno); - imap->im_ioffset = (ushort)off; - imap->im_boffset = (ushort)(off << mp->m_sb.sb_inodelog); - - /* - * If the inode number maps to a block outside the bounds - * of the file system then return NULL rather than calling - * read_buf and panicing when we get an error from the - * driver. - */ - if ((imap->im_blkno + imap->im_len) > - XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) { - xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " - "(imap->im_blkno (0x%llx) + imap->im_len (0x%llx)) > " - " XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) (0x%llx)", - (unsigned long long) imap->im_blkno, - (unsigned long long) imap->im_len, - XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)); - return EINVAL; - } - return 0; -} - void xfs_idestroy_fork( xfs_inode_t *ip, diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index db1f6884072..0a9ad1c56a8 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -157,7 +157,7 @@ typedef struct xfs_icdinode { #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */ /* - * Flags for xfs_inotobp, xfs_imap() and xfs_dilocate(). + * Flags for xfs_inotobp and xfs_imap(). */ #define XFS_IMAP_BULKSTAT 0x1 -- cgit v1.2.3-70-g09d2 From 92bfc6e7c4eabbbd15e7d6d49123b296d05dcfd1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:41 +1100 Subject: [XFS] embededd struct xfs_imap into xfs_inode Most uses of struct xfs_imap are to map and inode to a buffer. To avoid copying around the inode location information we should just embedd a strcut xfs_imap into the xfs_inode. To make sure it doesn't bloat an inode the im_len is changed to a ushort, which is fine as that's what the users exepect anyway. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_ialloc.c | 1 - fs/xfs/xfs_imap.h | 31 ------------------------------ fs/xfs/xfs_inode.c | 49 ++++++++++++++++++------------------------------ fs/xfs/xfs_inode.h | 14 +++++++++++--- fs/xfs/xfs_inode_item.c | 6 +++--- fs/xfs/xfs_itable.c | 2 +- fs/xfs/xfs_log_recover.c | 1 - 7 files changed, 33 insertions(+), 71 deletions(-) delete mode 100644 fs/xfs/xfs_imap.h (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 348ac30174c..4f4557262d9 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -40,7 +40,6 @@ #include "xfs_rtalloc.h" #include "xfs_error.h" #include "xfs_bmap.h" -#include "xfs_imap.h" /* diff --git a/fs/xfs/xfs_imap.h b/fs/xfs/xfs_imap.h deleted file mode 100644 index 08690005739..00000000000 --- a/fs/xfs/xfs_imap.h +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Copyright (c) 2000,2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __XFS_IMAP_H__ -#define __XFS_IMAP_H__ - -/* - * This is the structure passed to xfs_imap() to map - * an inode number to its on disk location. - */ -typedef struct xfs_imap { - xfs_daddr_t im_blkno; /* starting BB of inode chunk */ - uint im_len; /* length in BBs of inode chunk */ - ushort im_boffset; /* inode offset in block in bytes */ -} xfs_imap_t; - -#endif /* __XFS_IMAP_H__ */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index bf528b725ae..72dc7a87a14 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -23,7 +23,6 @@ #include "xfs_bit.h" #include "xfs_log.h" #include "xfs_inum.h" -#include "xfs_imap.h" #include "xfs_trans.h" #include "xfs_trans_priv.h" #include "xfs_sb.h" @@ -134,7 +133,7 @@ STATIC int xfs_imap_to_bp( xfs_mount_t *mp, xfs_trans_t *tp, - xfs_imap_t *imap, + struct xfs_imap *imap, xfs_buf_t **bpp, uint buf_flags, uint imap_flags) @@ -232,7 +231,7 @@ xfs_inotobp( int *offset, uint imap_flags) { - xfs_imap_t imap; + struct xfs_imap imap; xfs_buf_t *bp; int error; @@ -277,17 +276,12 @@ xfs_itobp( xfs_buf_t **bpp, uint buf_flags) { - xfs_imap_t imap; xfs_buf_t *bp; int error; - ASSERT(ip->i_blkno != 0); + ASSERT(ip->i_imap.im_blkno != 0); - imap.im_blkno = ip->i_blkno; - imap.im_len = ip->i_len; - imap.im_boffset = ip->i_boffset; - - error = xfs_imap_to_bp(mp, tp, &imap, &bp, buf_flags, 0); + error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &bp, buf_flags, 0); if (error) return error; @@ -298,7 +292,7 @@ xfs_itobp( return EAGAIN; } - *dipp = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); + *dipp = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); *bpp = bp; return 0; } @@ -799,9 +793,7 @@ xfs_inode_alloc( /* initialise the xfs inode */ ip->i_ino = ino; ip->i_mount = mp; - ip->i_blkno = 0; - ip->i_len = 0; - ip->i_boffset =0; + memset(&ip->i_imap, 0, sizeof(struct xfs_imap)); ip->i_afp = NULL; memset(&ip->i_df, 0, sizeof(xfs_ifork_t)); ip->i_flags = 0; @@ -857,7 +849,6 @@ xfs_iread( xfs_buf_t *bp; xfs_dinode_t *dip; xfs_inode_t *ip; - xfs_imap_t imap; int error; ip = xfs_inode_alloc(mp, ino); @@ -865,26 +856,22 @@ xfs_iread( return ENOMEM; /* - * Get pointers to the on-disk inode and the buffer containing it. + * Fill in the location information in the in-core inode. */ - imap.im_blkno = bno; - error = xfs_imap(mp, tp, ip->i_ino, &imap, imap_flags); + ip->i_imap.im_blkno = bno; + error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, imap_flags); if (error) goto out_destroy_inode; + ASSERT(bno == 0 || bno == ip->i_imap.im_blkno); /* - * Fill in the fields in the inode that will be used to - * map the inode to its buffer from now on. + * Get pointers to the on-disk inode and the buffer containing it. */ - ip->i_blkno = imap.im_blkno; - ip->i_len = imap.im_len; - ip->i_boffset = imap.im_boffset; - ASSERT(bno == 0 || bno == imap.im_blkno); - - error = xfs_imap_to_bp(mp, tp, &imap, &bp, XFS_BUF_LOCK, imap_flags); + error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &bp, + XFS_BUF_LOCK, imap_flags); if (error) goto out_destroy_inode; - dip = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset); + dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); /* * If we got something that isn't an inode it means someone @@ -1872,7 +1859,7 @@ xfs_iunlink( ASSERT(be32_to_cpu(dip->di_next_unlinked) == NULLAGINO); /* both on-disk, don't endian flip twice */ dip->di_next_unlinked = agi->agi_unlinked[bucket_index]; - offset = ip->i_boffset + + offset = ip->i_imap.im_boffset + offsetof(xfs_dinode_t, di_next_unlinked); xfs_trans_inode_buf(tp, ibp); xfs_trans_log_buf(tp, ibp, offset, @@ -1958,7 +1945,7 @@ xfs_iunlink_remove( ASSERT(next_agino != 0); if (next_agino != NULLAGINO) { dip->di_next_unlinked = cpu_to_be32(NULLAGINO); - offset = ip->i_boffset + + offset = ip->i_imap.im_boffset + offsetof(xfs_dinode_t, di_next_unlinked); xfs_trans_inode_buf(tp, ibp); xfs_trans_log_buf(tp, ibp, offset, @@ -2021,7 +2008,7 @@ xfs_iunlink_remove( ASSERT(next_agino != agino); if (next_agino != NULLAGINO) { dip->di_next_unlinked = cpu_to_be32(NULLAGINO); - offset = ip->i_boffset + + offset = ip->i_imap.im_boffset + offsetof(xfs_dinode_t, di_next_unlinked); xfs_trans_inode_buf(tp, ibp); xfs_trans_log_buf(tp, ibp, offset, @@ -3201,7 +3188,7 @@ xfs_iflush_int( } /* set *dip = inode's place in the buffer */ - dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_boffset); + dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset); /* * Clear i_update_core before copying out the data. diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 0a9ad1c56a8..d5c3aa1b18e 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -82,6 +82,16 @@ typedef struct xfs_ifork { } if_u2; } xfs_ifork_t; +/* + * Inode location information. Stored in the inode and passed to + * xfs_imap_to_bp() to get a buffer and dinode for a given inode. + */ +struct xfs_imap { + xfs_daddr_t im_blkno; /* starting BB of inode chunk */ + ushort im_len; /* length in BBs of inode chunk */ + ushort im_boffset; /* inode offset in block in bytes */ +}; + /* * This is the xfs in-core inode structure. * Most of the on-disk inode is embedded in the i_d field. @@ -238,9 +248,7 @@ typedef struct xfs_inode { /* Inode location stuff */ xfs_ino_t i_ino; /* inode number (agno/agino)*/ - xfs_daddr_t i_blkno; /* blkno of inode buffer */ - ushort i_len; /* len of inode buffer */ - ushort i_boffset; /* off of inode in buffer */ + struct xfs_imap i_imap; /* location for xfs_imap() */ /* Extent information. */ xfs_ifork_t *i_afp; /* attribute fork pointer */ diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index c43118148e6..977c4aec587 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -942,9 +942,9 @@ xfs_inode_item_init( iip->ili_format.ilf_type = XFS_LI_INODE; iip->ili_format.ilf_ino = ip->i_ino; - iip->ili_format.ilf_blkno = ip->i_blkno; - iip->ili_format.ilf_len = ip->i_len; - iip->ili_format.ilf_boffset = ip->i_boffset; + iip->ili_format.ilf_blkno = ip->i_imap.im_blkno; + iip->ili_format.ilf_len = ip->i_imap.im_len; + iip->ili_format.ilf_boffset = ip->i_imap.im_boffset; } /* diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 2cf16f4695e..4315ce642b4 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -69,7 +69,7 @@ xfs_bulkstat_one_iget( } ASSERT(ip != NULL); - ASSERT(ip->i_blkno != (xfs_daddr_t)0); + ASSERT(ip->i_imap.im_blkno != 0); dic = &ip->i_d; diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index bf8573b5a7d..ce6e907bec6 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -36,7 +36,6 @@ #include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_inode_item.h" -#include "xfs_imap.h" #include "xfs_alloc.h" #include "xfs_ialloc.h" #include "xfs_log_priv.h" -- cgit v1.2.3-70-g09d2 From b48d8d64377f39913663a06f4757f3b8c6fc6d87 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 14:23:41 +1100 Subject: [XFS] kill the XFS_IMAP_BULKSTAT flag Just pass down the XFS_IGET_* flags all the way down to xfs_imap instead of translating them mid-way. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Niv Sardi --- fs/xfs/xfs_ialloc.c | 2 +- fs/xfs/xfs_iget.c | 3 +-- fs/xfs/xfs_inode.c | 4 ++-- fs/xfs/xfs_inode.h | 5 ----- fs/xfs/xfs_itable.c | 2 +- 5 files changed, 5 insertions(+), 11 deletions(-) (limited to 'fs/xfs/xfs_ialloc.c') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 4f4557262d9..e6ebbaeb4dc 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -1228,7 +1228,7 @@ xfs_imap( ino != XFS_AGINO_TO_INO(mp, agno, agino)) { #ifdef DEBUG /* no diagnostics for bulkstat, ino comes from userspace */ - if (flags & XFS_IMAP_BULKSTAT) + if (flags & XFS_IGET_BULKSTAT) return XFS_ERROR(EINVAL); if (agno >= mp->m_sb.sb_agcount) { xfs_fs_cmn_err(CE_ALERT, mp, diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index bf4dc5eb4cf..d60522a73a1 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -159,8 +159,7 @@ xfs_iget_cache_miss( * Read the disk inode attributes into a new inode structure and get * a new vnode for it. This should also initialize i_ino and i_mount. */ - error = xfs_iread(mp, tp, ino, &ip, bno, - (flags & XFS_IGET_BULKSTAT) ? XFS_IMAP_BULKSTAT : 0); + error = xfs_iread(mp, tp, ino, &ip, bno, flags); if (error) return error; diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 72dc7a87a14..4290760473f 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -136,7 +136,7 @@ xfs_imap_to_bp( struct xfs_imap *imap, xfs_buf_t **bpp, uint buf_flags, - uint imap_flags) + uint iget_flags) { int error; int i; @@ -178,7 +178,7 @@ xfs_imap_to_bp( if (unlikely(XFS_TEST_ERROR(!di_ok, mp, XFS_ERRTAG_ITOBP_INOTOBP, XFS_RANDOM_ITOBP_INOTOBP))) { - if (imap_flags & XFS_IMAP_BULKSTAT) { + if (iget_flags & XFS_IGET_BULKSTAT) { xfs_trans_brelse(tp, bp); return XFS_ERROR(EINVAL); } diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index d5c3aa1b18e..49e609c39d7 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -166,11 +166,6 @@ typedef struct xfs_icdinode { #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */ -/* - * Flags for xfs_inotobp and xfs_imap(). - */ -#define XFS_IMAP_BULKSTAT 0x1 - /* * Fork handling. */ diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 4315ce642b4..d4c0de86012 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -595,7 +595,7 @@ xfs_bulkstat( error = xfs_inotobp(mp, NULL, ino, &dip, &bp, &offset, - XFS_IMAP_BULKSTAT); + XFS_IGET_BULKSTAT); if (!error) clustidx = offset / mp->m_sb.sb_inodesize; -- cgit v1.2.3-70-g09d2