diff options
Diffstat (limited to 'fs/jfs/jfs_xtree.c')
| -rw-r--r-- | fs/jfs/jfs_xtree.c | 428 |
1 files changed, 212 insertions, 216 deletions
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c index acc97c46d8a..1543906a2e0 100644 --- a/fs/jfs/jfs_xtree.c +++ b/fs/jfs/jfs_xtree.c @@ -16,7 +16,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* - * jfs_xtree.c: extent allocation descriptor B+-tree manager + * jfs_xtree.c: extent allocation descriptor B+-tree manager */ #include <linux/fs.h> @@ -32,30 +32,30 @@ /* * xtree local flag */ -#define XT_INSERT 0x00000001 +#define XT_INSERT 0x00000001 /* - * xtree key/entry comparison: extent offset + * xtree key/entry comparison: extent offset * * return: - * -1: k < start of extent - * 0: start_of_extent <= k <= end_of_extent - * 1: k > end_of_extent + * -1: k < start of extent + * 0: start_of_extent <= k <= end_of_extent + * 1: k > end_of_extent */ #define XT_CMP(CMP, K, X, OFFSET64)\ {\ - OFFSET64 = offsetXAD(X);\ - (CMP) = ((K) >= OFFSET64 + lengthXAD(X)) ? 1 :\ - ((K) < OFFSET64) ? -1 : 0;\ + OFFSET64 = offsetXAD(X);\ + (CMP) = ((K) >= OFFSET64 + lengthXAD(X)) ? 1 :\ + ((K) < OFFSET64) ? -1 : 0;\ } /* write a xad entry */ #define XT_PUTENTRY(XAD, FLAG, OFF, LEN, ADDR)\ {\ - (XAD)->flag = (FLAG);\ - XADoffset((XAD), (OFF));\ - XADlength((XAD), (LEN));\ - XADaddress((XAD), (ADDR));\ + (XAD)->flag = (FLAG);\ + XADoffset((XAD), (OFF));\ + XADlength((XAD), (LEN));\ + XADaddress((XAD), (ADDR));\ } #define XT_PAGE(IP, MP) BT_PAGE(IP, MP, xtpage_t, i_xtroot) @@ -76,13 +76,13 @@ MP = NULL;\ RC = -EIO;\ }\ - }\ + }\ } /* for consistency */ #define XT_PUTPAGE(MP) BT_PUTPAGE(MP) -#define XT_GETSEARCH(IP, LEAF, BN, MP, P, INDEX) \ +#define XT_GETSEARCH(IP, LEAF, BN, MP, P, INDEX) \ BT_GETSEARCH(IP, LEAF, BN, MP, xtpage_t, P, INDEX, i_xtroot) /* xtree entry parameter descriptor */ struct xtsplit { @@ -97,7 +97,7 @@ struct xtsplit { /* - * statistics + * statistics */ #ifdef CONFIG_JFS_STATISTICS static struct { @@ -136,7 +136,7 @@ static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * fp); #endif /* _STILL_TO_PORT */ /* - * xtLookup() + * xtLookup() * * function: map a single page into a physical extent; */ @@ -179,7 +179,7 @@ int xtLookup(struct inode *ip, s64 lstart, } /* - * compute the physical extent covering logical extent + * compute the physical extent covering logical extent * * N.B. search may have failed (e.g., hole in sparse file), * and returned the index of the next entry. @@ -220,27 +220,27 @@ int xtLookup(struct inode *ip, s64 lstart, /* - * xtLookupList() + * xtLookupList() * * function: map a single logical extent into a list of physical extent; * * parameter: - * struct inode *ip, - * struct lxdlist *lxdlist, lxd list (in) - * struct xadlist *xadlist, xad list (in/out) - * int flag) + * struct inode *ip, + * struct lxdlist *lxdlist, lxd list (in) + * struct xadlist *xadlist, xad list (in/out) + * int flag) * * coverage of lxd by xad under assumption of * . lxd's are ordered and disjoint. * . xad's are ordered and disjoint. * * return: - * 0: success + * 0: success * * note: a page being written (even a single byte) is backed fully, - * except the last page which is only backed with blocks - * required to cover the last byte; - * the extent backing a page is fully contained within an xad; + * except the last page which is only backed with blocks + * required to cover the last byte; + * the extent backing a page is fully contained within an xad; */ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist, struct xadlist * xadlist, int flag) @@ -284,7 +284,7 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist, return rc; /* - * compute the physical extent covering logical extent + * compute the physical extent covering logical extent * * N.B. search may have failed (e.g., hole in sparse file), * and returned the index of the next entry. @@ -343,7 +343,7 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist, if (lstart >= size) goto mapend; - /* compare with the current xad */ + /* compare with the current xad */ goto compare1; } /* lxd is covered by xad */ @@ -430,7 +430,7 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist, /* * lxd is partially covered by xad */ - else { /* (xend < lend) */ + else { /* (xend < lend) */ /* * get next xad @@ -477,22 +477,22 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist, /* - * xtSearch() + * xtSearch() * - * function: search for the xad entry covering specified offset. + * function: search for the xad entry covering specified offset. * * parameters: - * ip - file object; - * xoff - extent offset; - * nextp - address of next extent (if any) for search miss - * cmpp - comparison result: - * btstack - traverse stack; - * flag - search process flag (XT_INSERT); + * ip - file object; + * xoff - extent offset; + * nextp - address of next extent (if any) for search miss + * cmpp - comparison result: + * btstack - traverse stack; + * flag - search process flag (XT_INSERT); * * returns: - * btstack contains (bn, index) of search path traversed to the entry. - * *cmpp is set to result of comparison with the entry returned. - * the page containing the entry is pinned at exit. + * btstack contains (bn, index) of search path traversed to the entry. + * *cmpp is set to result of comparison with the entry returned. + * the page containing the entry is pinned at exit. */ static int xtSearch(struct inode *ip, s64 xoff, s64 *nextp, int *cmpp, struct btstack * btstack, int flag) @@ -517,7 +517,7 @@ static int xtSearch(struct inode *ip, s64 xoff, s64 *nextp, btstack->nsplit = 0; /* - * search down tree from root: + * search down tree from root: * * between two consecutive entries of <Ki, Pi> and <Kj, Pj> of * internal page, child page Pi contains entry with k, Ki <= K < Kj. @@ -642,7 +642,7 @@ static int xtSearch(struct inode *ip, s64 xoff, s64 *nextp, XT_CMP(cmp, xoff, &p->xad[index], t64); if (cmp == 0) { /* - * search hit + * search hit */ /* search hit - leaf page: * return the entry found @@ -692,7 +692,7 @@ static int xtSearch(struct inode *ip, s64 xoff, s64 *nextp, } /* - * search miss + * search miss * * base is the smallest index with key (Kj) greater than * search key (K) and may be zero or maxentry index. @@ -773,22 +773,22 @@ static int xtSearch(struct inode *ip, s64 xoff, s64 *nextp, } /* - * xtInsert() + * xtInsert() * * function: * * parameter: - * tid - transaction id; - * ip - file object; - * xflag - extent flag (XAD_NOTRECORDED): - * xoff - extent offset; - * xlen - extent length; - * xaddrp - extent address pointer (in/out): - * if (*xaddrp) - * caller allocated data extent at *xaddrp; - * else - * allocate data extent and return its xaddr; - * flag - + * tid - transaction id; + * ip - file object; + * xflag - extent flag (XAD_NOTRECORDED): + * xoff - extent offset; + * xlen - extent length; + * xaddrp - extent address pointer (in/out): + * if (*xaddrp) + * caller allocated data extent at *xaddrp; + * else + * allocate data extent and return its xaddr; + * flag - * * return: */ @@ -813,7 +813,7 @@ int xtInsert(tid_t tid, /* transaction id */ jfs_info("xtInsert: nxoff:0x%lx nxlen:0x%x", (ulong) xoff, xlen); /* - * search for the entry location at which to insert: + * search for the entry location at which to insert: * * xtFastSearch() and xtSearch() both returns (leaf page * pinned, index at which to insert). @@ -853,13 +853,13 @@ int xtInsert(tid_t tid, /* transaction id */ } /* - * insert entry for new extent + * insert entry for new extent */ xflag |= XAD_NEW; /* - * if the leaf page is full, split the page and - * propagate up the router entry for the new page from split + * if the leaf page is full, split the page and + * propagate up the router entry for the new page from split * * The xtSplitUp() will insert the entry and unpin the leaf page. */ @@ -886,7 +886,7 @@ int xtInsert(tid_t tid, /* transaction id */ } /* - * insert the new entry into the leaf page + * insert the new entry into the leaf page */ /* * acquire a transaction lock on the leaf page; @@ -930,16 +930,16 @@ int xtInsert(tid_t tid, /* transaction id */ /* - * xtSplitUp() + * xtSplitUp() * * function: - * split full pages as propagating insertion up the tree + * split full pages as propagating insertion up the tree * * parameter: - * tid - transaction id; - * ip - file object; - * split - entry parameter descriptor; - * btstack - traverse stack from xtSearch() + * tid - transaction id; + * ip - file object; + * split - entry parameter descriptor; + * btstack - traverse stack from xtSearch() * * return: */ @@ -1199,22 +1199,22 @@ xtSplitUp(tid_t tid, /* - * xtSplitPage() + * xtSplitPage() * * function: - * split a full non-root page into - * original/split/left page and new right page - * i.e., the original/split page remains as left page. + * split a full non-root page into + * original/split/left page and new right page + * i.e., the original/split page remains as left page. * * parameter: - * int tid, - * struct inode *ip, - * struct xtsplit *split, - * struct metapage **rmpp, - * u64 *rbnp, + * int tid, + * struct inode *ip, + * struct xtsplit *split, + * struct metapage **rmpp, + * u64 *rbnp, * * return: - * Pointer to page in which to insert or NULL on error. + * Pointer to page in which to insert or NULL on error. */ static int xtSplitPage(tid_t tid, struct inode *ip, @@ -1248,9 +1248,9 @@ xtSplitPage(tid_t tid, struct inode *ip, rbn = addressPXD(pxd); /* Allocate blocks to quota. */ - if (DQUOT_ALLOC_BLOCK(ip, lengthPXD(pxd))) { - rc = -EDQUOT; - goto clean_up; + if (DQUOT_ALLOC_BLOCK(ip, lengthPXD(pxd))) { + rc = -EDQUOT; + goto clean_up; } quota_allocation += lengthPXD(pxd); @@ -1304,7 +1304,7 @@ xtSplitPage(tid_t tid, struct inode *ip, skip = split->index; /* - * sequential append at tail (after last entry of last page) + * sequential append at tail (after last entry of last page) * * if splitting the last page on a level because of appending * a entry to it (skip is maxentry), it's likely that the access is @@ -1342,7 +1342,7 @@ xtSplitPage(tid_t tid, struct inode *ip, } /* - * non-sequential insert (at possibly middle page) + * non-sequential insert (at possibly middle page) */ /* @@ -1465,25 +1465,24 @@ xtSplitPage(tid_t tid, struct inode *ip, /* - * xtSplitRoot() + * xtSplitRoot() * * function: - * split the full root page into - * original/root/split page and new right page - * i.e., root remains fixed in tree anchor (inode) and - * the root is copied to a single new right child page - * since root page << non-root page, and - * the split root page contains a single entry for the - * new right child page. + * split the full root page into original/root/split page and new + * right page + * i.e., root remains fixed in tree anchor (inode) and the root is + * copied to a single new right child page since root page << + * non-root page, and the split root page contains a single entry + * for the new right child page. * * parameter: - * int tid, - * struct inode *ip, - * struct xtsplit *split, - * struct metapage **rmpp) + * int tid, + * struct inode *ip, + * struct xtsplit *split, + * struct metapage **rmpp) * * return: - * Pointer to page in which to insert or NULL on error. + * Pointer to page in which to insert or NULL on error. */ static int xtSplitRoot(tid_t tid, @@ -1505,7 +1504,7 @@ xtSplitRoot(tid_t tid, INCREMENT(xtStat.split); /* - * allocate a single (right) child page + * allocate a single (right) child page */ pxdlist = split->pxdlist; pxd = &pxdlist->pxd[pxdlist->npxd]; @@ -1573,7 +1572,7 @@ xtSplitRoot(tid_t tid, } /* - * reset the root + * reset the root * * init root with the single entry for the new right page * set the 1st entry offset to 0, which force the left-most key @@ -1610,7 +1609,7 @@ xtSplitRoot(tid_t tid, /* - * xtExtend() + * xtExtend() * * function: extend in-place; * @@ -1677,7 +1676,7 @@ int xtExtend(tid_t tid, /* transaction id */ goto extendOld; /* - * extent overflow: insert entry for new extent + * extent overflow: insert entry for new extent */ //insertNew: xoff = offsetXAD(xad) + MAXXLEN; @@ -1685,8 +1684,8 @@ int xtExtend(tid_t tid, /* transaction id */ nextindex = le16_to_cpu(p->header.nextindex); /* - * if the leaf page is full, insert the new entry and - * propagate up the router entry for the new page from split + * if the leaf page is full, insert the new entry and + * propagate up the router entry for the new page from split * * The xtSplitUp() will insert the entry and unpin the leaf page. */ @@ -1731,7 +1730,7 @@ int xtExtend(tid_t tid, /* transaction id */ } } /* - * insert the new entry into the leaf page + * insert the new entry into the leaf page */ else { /* insert the new entry: mark the entry NEW */ @@ -1771,11 +1770,11 @@ int xtExtend(tid_t tid, /* transaction id */ #ifdef _NOTYET /* - * xtTailgate() + * xtTailgate() * * function: split existing 'tail' extent - * (split offset >= start offset of tail extent), and - * relocate and extend the split tail half; + * (split offset >= start offset of tail extent), and + * relocate and extend the split tail half; * * note: existing extent may or may not have been committed. * caller is responsible for pager buffer cache update, and @@ -1804,7 +1803,7 @@ int xtTailgate(tid_t tid, /* transaction id */ /* printf("xtTailgate: nxoff:0x%lx nxlen:0x%x nxaddr:0x%lx\n", - (ulong)xoff, xlen, (ulong)xaddr); + (ulong)xoff, xlen, (ulong)xaddr); */ /* there must exist extent to be tailgated */ @@ -1842,18 +1841,18 @@ printf("xtTailgate: nxoff:0x%lx nxlen:0x%x nxaddr:0x%lx\n", xad = &p->xad[index]; /* printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n", - (ulong)offsetXAD(xad), lengthXAD(xad), (ulong)addressXAD(xad)); + (ulong)offsetXAD(xad), lengthXAD(xad), (ulong)addressXAD(xad)); */ if ((llen = xoff - offsetXAD(xad)) == 0) goto updateOld; /* - * partially replace extent: insert entry for new extent + * partially replace extent: insert entry for new extent */ //insertNew: /* - * if the leaf page is full, insert the new entry and - * propagate up the router entry for the new page from split + * if the leaf page is full, insert the new entry and + * propagate up the router entry for the new page from split * * The xtSplitUp() will insert the entry and unpin the leaf page. */ @@ -1898,7 +1897,7 @@ printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n", } } /* - * insert the new entry into the leaf page + * insert the new entry into the leaf page */ else { /* insert the new entry: mark the entry NEW */ @@ -1955,17 +1954,17 @@ printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n", #endif /* _NOTYET */ /* - * xtUpdate() + * xtUpdate() * * function: update XAD; * - * update extent for allocated_but_not_recorded or - * compressed extent; + * update extent for allocated_but_not_recorded or + * compressed extent; * * parameter: - * nxad - new XAD; - * logical extent of the specified XAD must be completely - * contained by an existing XAD; + * nxad - new XAD; + * logical extent of the specified XAD must be completely + * contained by an existing XAD; */ int xtUpdate(tid_t tid, struct inode *ip, xad_t * nxad) { /* new XAD */ @@ -2416,19 +2415,19 @@ printf("xtUpdate.updateLeft.split p:0x%p\n", p); /* - * xtAppend() + * xtAppend() * * function: grow in append mode from contiguous region specified ; * * parameter: - * tid - transaction id; - * ip - file object; - * xflag - extent flag: - * xoff - extent offset; - * maxblocks - max extent length; - * xlen - extent length (in/out); - * xaddrp - extent address pointer (in/out): - * flag - + * tid - transaction id; + * ip - file object; + * xflag - extent flag: + * xoff - extent offset; + * maxblocks - max extent length; + * xlen - extent length (in/out); + * xaddrp - extent address pointer (in/out): + * flag - * * return: */ @@ -2460,7 +2459,7 @@ int xtAppend(tid_t tid, /* transaction id */ (ulong) xoff, maxblocks, xlen, (ulong) xaddr); /* - * search for the entry location at which to insert: + * search for the entry location at which to insert: * * xtFastSearch() and xtSearch() both returns (leaf page * pinned, index at which to insert). @@ -2482,13 +2481,13 @@ int xtAppend(tid_t tid, /* transaction id */ xlen = min(xlen, (int)(next - xoff)); //insert: /* - * insert entry for new extent + * insert entry for new extent */ xflag |= XAD_NEW; /* - * if the leaf page is full, split the page and - * propagate up the router entry for the new page from split + * if the leaf page is full, split the page and + * propagate up the router entry for the new page from split * * The xtSplitUp() will insert the entry and unpin the leaf page. */ @@ -2545,7 +2544,7 @@ int xtAppend(tid_t tid, /* transaction id */ return 0; /* - * insert the new entry into the leaf page + * insert the new entry into the leaf page */ insertLeaf: /* @@ -2589,17 +2588,17 @@ int xtAppend(tid_t tid, /* transaction id */ /* - TBD for defragmentaion/reorganization - * - * xtDelete() + * xtDelete() * * function: - * delete the entry with the specified key. + * delete the entry with the specified key. * - * N.B.: whole extent of the entry is assumed to be deleted. + * N.B.: whole extent of the entry is assumed to be deleted. * * parameter: * * return: - * ENOENT: if the entry is not found. + * ENOENT: if the entry is not found. * * exception: */ @@ -2665,10 +2664,10 @@ int xtDelete(tid_t tid, struct inode *ip, s64 xoff, s32 xlen, int flag) /* - TBD for defragmentaion/reorganization - * - * xtDeleteUp() + * xtDeleteUp() * * function: - * free empty pages as propagating deletion up the tree + * free empty pages as propagating deletion up the tree * * parameter: * @@ -2815,15 +2814,15 @@ xtDeleteUp(tid_t tid, struct inode *ip, /* - * NAME: xtRelocate() + * NAME: xtRelocate() * - * FUNCTION: relocate xtpage or data extent of regular file; - * This function is mainly used by defragfs utility. + * FUNCTION: relocate xtpage or data extent of regular file; + * This function is mainly used by defragfs utility. * - * NOTE: This routine does not have the logic to handle - * uncommitted allocated extent. The caller should call - * txCommit() to commit all the allocation before call - * this routine. + * NOTE: This routine does not have the logic to handle + * uncommitted allocated extent. The caller should call + * txCommit() to commit all the allocation before call + * this routine. */ int xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ @@ -2865,8 +2864,8 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ xtype, (ulong) xoff, xlen, (ulong) oxaddr, (ulong) nxaddr); /* - * 1. get and validate the parent xtpage/xad entry - * covering the source extent to be relocated; + * 1. get and validate the parent xtpage/xad entry + * covering the source extent to be relocated; */ if (xtype == DATAEXT) { /* search in leaf entry */ @@ -2910,7 +2909,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ jfs_info("xtRelocate: parent xad entry validated."); /* - * 2. relocate the extent + * 2. relocate the extent */ if (xtype == DATAEXT) { /* if the extent is allocated-but-not-recorded @@ -2923,7 +2922,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ XT_PUTPAGE(pmp); /* - * cmRelocate() + * cmRelocate() * * copy target data pages to be relocated; * @@ -2945,8 +2944,8 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ pno = offset >> CM_L2BSIZE; npages = (nbytes + (CM_BSIZE - 1)) >> CM_L2BSIZE; /* - npages = ((offset + nbytes - 1) >> CM_L2BSIZE) - - (offset >> CM_L2BSIZE) + 1; + npages = ((offset + nbytes - 1) >> CM_L2BSIZE) - + (offset >> CM_L2BSIZE) + 1; */ sxaddr = oxaddr; dxaddr = nxaddr; @@ -2981,7 +2980,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ XT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index); jfs_info("xtRelocate: target data extent relocated."); - } else { /* (xtype == XTPAGE) */ + } else { /* (xtype == XTPAGE) */ /* * read in the target xtpage from the source extent; @@ -3026,16 +3025,14 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ */ if (lmp) { BT_MARK_DIRTY(lmp, ip); - tlck = - txLock(tid, ip, lmp, tlckXTREE | tlckRELINK); + tlck = txLock(tid, ip, lmp, tlckXTREE | tlckRELINK); lp->header.next = cpu_to_le64(nxaddr); XT_PUTPAGE(lmp); } if (rmp) { BT_MARK_DIRTY(rmp, ip); - tlck = - txLock(tid, ip, rmp, tlckXTREE | tlckRELINK); + tlck = txLock(tid, ip, rmp, tlckXTREE | tlckRELINK); rp->header.prev = cpu_to_le64(nxaddr); XT_PUTPAGE(rmp); } @@ -3062,7 +3059,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ * scan may be skipped by commit() and logredo(); */ BT_MARK_DIRTY(mp, ip); - /* tlckNEW init xtlck->lwm.offset = XTENTRYSTART; */ + /* tlckNEW init xtlck->lwm.offset = XTENTRYSTART; */ tlck = txLock(tid, ip, mp, tlckXTREE | tlckNEW); xtlck = (struct xtlock *) & tlck->lock; @@ -3084,7 +3081,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ } /* - * 3. acquire maplock for the source extent to be freed; + * 3. acquire maplock for the source extent to be freed; * * acquire a maplock saving the src relocated extent address; * to free of the extent at commit time; @@ -3105,7 +3102,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ * is no buffer associated with this lock since the buffer * has been redirected to the target location. */ - else /* (xtype == XTPAGE) */ + else /* (xtype == XTPAGE) */ tlck = txMaplock(tid, ip, tlckMAP | tlckRELOCATE); pxdlock = (struct pxd_lock *) & tlck->lock; @@ -3115,7 +3112,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ pxdlock->index = 1; /* - * 4. update the parent xad entry for relocation; + * 4. update the parent xad entry for relocation; * * acquire tlck for the parent entry with XAD_NEW as entry * update which will write LOG_REDOPAGE and update bmap for @@ -3143,22 +3140,22 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad, /* old XAD */ /* - * xtSearchNode() + * xtSearchNode() * - * function: search for the internal xad entry covering specified extent. - * This function is mainly used by defragfs utility. + * function: search for the internal xad entry covering specified extent. + * This function is mainly used by defragfs utility. * * parameters: - * ip - file object; - * xad - extent to find; - * cmpp - comparison result: - * btstack - traverse stack; - * flag - search process flag; + * ip - file object; + * xad - extent to find; + * cmpp - comparison result: + * btstack - traverse stack; + * flag - search process flag; * * returns: - * btstack contains (bn, index) of search path traversed to the entry. - * *cmpp is set to result of comparison with the entry returned. - * the page containing the entry is pinned at exit. + * btstack contains (bn, index) of search path traversed to the entry. + * *cmpp is set to result of comparison with the entry returned. + * the page containing the entry is pinned at exit. */ static int xtSearchNode(struct inode *ip, xad_t * xad, /* required XAD entry */ int *cmpp, struct btstack * btstack, int flag) @@ -3181,7 +3178,7 @@ static int xtSearchNode(struct inode *ip, xad_t * xad, /* required XAD entry */ xaddr = addressXAD(xad); /* - * search down tree from root: + * search down tree from root: * * between two consecutive entries of <Ki, Pi> and <Kj, Pj> of * internal page, child page Pi contains entry with k, Ki <= K < Kj. @@ -3217,7 +3214,7 @@ static int xtSearchNode(struct inode *ip, xad_t * xad, /* required XAD entry */ XT_CMP(cmp, xoff, &p->xad[index], t64); if (cmp == 0) { /* - * search hit + * search hit * * verify for exact match; */ @@ -3245,7 +3242,7 @@ static int xtSearchNode(struct inode *ip, xad_t * xad, /* required XAD entry */ } /* - * search miss - non-leaf page: + * search miss - non-leaf page: * * base is the smallest index with key (Kj) greater than * search key (K) and may be zero or maxentry index. @@ -3268,15 +3265,15 @@ static int xtSearchNode(struct inode *ip, xad_t * xad, /* required XAD entry */ /* - * xtRelink() + * xtRelink() * * function: - * link around a freed page. + * link around a freed page. * * Parameter: - * int tid, - * struct inode *ip, - * xtpage_t *p) + * int tid, + * struct inode *ip, + * xtpage_t *p) * * returns: */ @@ -3338,7 +3335,7 @@ static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * p) /* - * xtInitRoot() + * xtInitRoot() * * initialize file root (inline in inode) */ @@ -3385,42 +3382,42 @@ void xtInitRoot(tid_t tid, struct inode *ip) #define MAX_TRUNCATE_LEAVES 50 /* - * xtTruncate() + * xtTruncate() * * function: - * traverse for truncation logging backward bottom up; - * terminate at the last extent entry at the current subtree - * root page covering new down size. - * truncation may occur within the last extent entry. + * traverse for truncation logging backward bottom up; + * terminate at the last extent entry at the current subtree + * root page covering new down size. + * truncation may occur within the last extent entry. * * parameter: - * int tid, - * struct inode *ip, - * s64 newsize, - * int type) {PWMAP, PMAP, WMAP; DELETE, TRUNCATE} + * int tid, + * struct inode *ip, + * s64 newsize, + * int type) {PWMAP, PMAP, WMAP; DELETE, TRUNCATE} * * return: * * note: - * PWMAP: - * 1. truncate (non-COMMIT_NOLINK file) - * by jfs_truncate() or jfs_open(O_TRUNC): - * xtree is updated; + * PWMAP: + * 1. truncate (non-COMMIT_NOLINK file) + * by jfs_truncate() or jfs_open(O_TRUNC): + * xtree is updated; * 2. truncate index table of directory when last entry removed - * map update via tlock at commit time; - * PMAP: + * map update via tlock at commit time; + * PMAP: * Call xtTruncate_pmap instead - * WMAP: - * 1. remove (free zero link count) on last reference release - * (pmap has been freed at commit zero link count); - * 2. truncate (COMMIT_NOLINK file, i.e., tmp file): - * xtree is updated; - * map update directly at truncation time; + * WMAP: + * 1. remove (free zero link count) on last reference release + * (pmap has been freed at commit zero link count); + * 2. truncate (COMMIT_NOLINK file, i.e., tmp file): + * xtree is updated; + * map update directly at truncation time; * - * if (DELETE) - * no LOG_NOREDOPAGE is required (NOREDOFILE is sufficient); - * else if (TRUNCATE) - * must write LOG_NOREDOPAGE for deleted index page; + * if (DELETE) + * no LOG_NOREDOPAGE is required (NOREDOFILE is sufficient); + * else if (TRUNCATE) + * must write LOG_NOREDOPAGE for deleted index page; * * pages may already have been tlocked by anonymous transactions * during file growth (i.e., write) before truncation; @@ -3493,7 +3490,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) * retained in the new sized file. * if type is PMAP, the data and index pages are NOT * freed, and the data and index blocks are NOT freed - * from working map. + * from working map. * (this will allow continued access of data/index of * temporary file (zerolink count file truncated to zero-length)). */ @@ -3542,7 +3539,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) goto getChild; /* - * leaf page + * leaf page */ freed = 0; @@ -3916,7 +3913,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) } /* - * internal page: go down to child page of current entry + * internal page: go down to child page of current entry */ getChild: /* save current parent entry for the child page */ @@ -3965,7 +3962,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) /* - * xtTruncate_pmap() + * xtTruncate_pmap() * * function: * Perform truncate to zero lenghth for deleted file, leaving the @@ -3974,9 +3971,9 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) * is committed to disk. * * parameter: - * tid_t tid, - * struct inode *ip, - * s64 committed_size) + * tid_t tid, + * struct inode *ip, + * s64 committed_size) * * return: new committed size * @@ -4050,7 +4047,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size) } /* - * leaf page + * leaf page */ if (++locked_leaves > MAX_TRUNCATE_LEAVES) { @@ -4062,7 +4059,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size) xoff = offsetXAD(xad); xlen = lengthXAD(xad); XT_PUTPAGE(mp); - return (xoff + xlen) << JFS_SBI(ip->i_sb)->l2bsize; + return (xoff + xlen) << JFS_SBI(ip->i_sb)->l2bsize; } tlck = txLock(tid, ip, mp, tlckXTREE); tlck->type = tlckXTREE | tlckFREE; @@ -4099,8 +4096,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size) */ tlck = txLock(tid, ip, mp, tlckXTREE); xtlck = (struct xtlock *) & tlck->lock; - xtlck->hwm.offset = - le16_to_cpu(p->header.nextindex) - 1; + xtlck->hwm.offset = le16_to_cpu(p->header.nextindex) - 1; tlck->type = tlckXTREE | tlckFREE; XT_PUTPAGE(mp); @@ -4118,7 +4114,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size) else index--; /* - * internal page: go down to child page of current entry + * internal page: go down to child page of current entry */ getChild: /* save current parent entry for the child page */ |