summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_dir.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/xfs/xfs_dir.c')
-rw-r--r--fs/xfs/xfs_dir.c1217
1 files changed, 0 insertions, 1217 deletions
diff --git a/fs/xfs/xfs_dir.c b/fs/xfs/xfs_dir.c
deleted file mode 100644
index 9cc702a839a..00000000000
--- a/fs/xfs/xfs_dir.c
+++ /dev/null
@@ -1,1217 +0,0 @@
-/*
- * Copyright (c) 2000-2001,2005 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
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_types.h"
-#include "xfs_log.h"
-#include "xfs_inum.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_dir.h"
-#include "xfs_dir2.h"
-#include "xfs_dmapi.h"
-#include "xfs_mount.h"
-#include "xfs_da_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_alloc.h"
-#include "xfs_btree.h"
-#include "xfs_dir_sf.h"
-#include "xfs_dir2_sf.h"
-#include "xfs_attr_sf.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_bmap.h"
-#include "xfs_dir_leaf.h"
-#include "xfs_error.h"
-
-/*
- * xfs_dir.c
- *
- * Provide the external interfaces to manage directories.
- */
-
-/*========================================================================
- * Function prototypes for the kernel.
- *========================================================================*/
-
-/*
- * Functions for the dirops interfaces.
- */
-static void xfs_dir_mount(struct xfs_mount *mp);
-
-static int xfs_dir_isempty(struct xfs_inode *dp);
-
-static int xfs_dir_init(struct xfs_trans *trans,
- struct xfs_inode *dir,
- struct xfs_inode *parent_dir);
-
-static int xfs_dir_createname(struct xfs_trans *trans,
- struct xfs_inode *dp,
- char *name_string,
- int name_len,
- xfs_ino_t inode_number,
- xfs_fsblock_t *firstblock,
- xfs_bmap_free_t *flist,
- xfs_extlen_t total);
-
-static int xfs_dir_lookup(struct xfs_trans *tp,
- struct xfs_inode *dp,
- char *name_string,
- int name_length,
- xfs_ino_t *inode_number);
-
-static int xfs_dir_removename(struct xfs_trans *trans,
- struct xfs_inode *dp,
- char *name_string,
- int name_length,
- xfs_ino_t ino,
- xfs_fsblock_t *firstblock,
- xfs_bmap_free_t *flist,
- xfs_extlen_t total);
-
-static int xfs_dir_getdents(struct xfs_trans *tp,
- struct xfs_inode *dp,
- struct uio *uiop,
- int *eofp);
-
-static int xfs_dir_replace(struct xfs_trans *tp,
- struct xfs_inode *dp,
- char *name_string,
- int name_length,
- xfs_ino_t inode_number,
- xfs_fsblock_t *firstblock,
- xfs_bmap_free_t *flist,
- xfs_extlen_t total);
-
-static int xfs_dir_canenter(struct xfs_trans *tp,
- struct xfs_inode *dp,
- char *name_string,
- int name_length);
-
-static int xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp,
- xfs_dinode_t *dip);
-
-xfs_dirops_t xfsv1_dirops = {
- .xd_mount = xfs_dir_mount,
- .xd_isempty = xfs_dir_isempty,
- .xd_init = xfs_dir_init,
- .xd_createname = xfs_dir_createname,
- .xd_lookup = xfs_dir_lookup,
- .xd_removename = xfs_dir_removename,
- .xd_getdents = xfs_dir_getdents,
- .xd_replace = xfs_dir_replace,
- .xd_canenter = xfs_dir_canenter,
- .xd_shortform_validate_ondisk = xfs_dir_shortform_validate_ondisk,
- .xd_shortform_to_single = xfs_dir_shortform_to_leaf,
-};
-
-/*
- * Internal routines when dirsize == XFS_LBSIZE(mp).
- */
-STATIC int xfs_dir_leaf_lookup(xfs_da_args_t *args);
-STATIC int xfs_dir_leaf_removename(xfs_da_args_t *args, int *number_entries,
- int *total_namebytes);
-STATIC int xfs_dir_leaf_getdents(xfs_trans_t *trans, xfs_inode_t *dp,
- uio_t *uio, int *eofp,
- xfs_dirent_t *dbp,
- xfs_dir_put_t put);
-STATIC int xfs_dir_leaf_replace(xfs_da_args_t *args);
-
-/*
- * Internal routines when dirsize > XFS_LBSIZE(mp).
- */
-STATIC int xfs_dir_node_addname(xfs_da_args_t *args);
-STATIC int xfs_dir_node_lookup(xfs_da_args_t *args);
-STATIC int xfs_dir_node_removename(xfs_da_args_t *args);
-STATIC int xfs_dir_node_getdents(xfs_trans_t *trans, xfs_inode_t *dp,
- uio_t *uio, int *eofp,
- xfs_dirent_t *dbp,
- xfs_dir_put_t put);
-STATIC int xfs_dir_node_replace(xfs_da_args_t *args);
-
-#if defined(XFS_DIR_TRACE)
-ktrace_t *xfs_dir_trace_buf;
-#endif
-
-
-/*========================================================================
- * Overall external interface routines.
- *========================================================================*/
-
-xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
-
-/*
- * One-time startup routine called from xfs_init().
- */
-void
-xfs_dir_startup(void)
-{
- xfs_dir_hash_dot = xfs_da_hashname(".", 1);
- xfs_dir_hash_dotdot = xfs_da_hashname("..", 2);
-}
-
-/*
- * Initialize directory-related fields in the mount structure.
- */
-static void
-xfs_dir_mount(xfs_mount_t *mp)
-{
- uint shortcount, leafcount, count;
-
- mp->m_dirversion = 1;
- if (!(mp->m_flags & XFS_MOUNT_ATTR2)) {
- shortcount = (mp->m_attroffset -
- (uint)sizeof(xfs_dir_sf_hdr_t)) /
- (uint)sizeof(xfs_dir_sf_entry_t);
- leafcount = (XFS_LBSIZE(mp) -
- (uint)sizeof(xfs_dir_leaf_hdr_t)) /
- ((uint)sizeof(xfs_dir_leaf_entry_t) +
- (uint)sizeof(xfs_dir_leaf_name_t));
- } else {
- shortcount = (XFS_BMDR_SPACE_CALC(MINABTPTRS) -
- (uint)sizeof(xfs_dir_sf_hdr_t)) /
- (uint)sizeof(xfs_dir_sf_entry_t);
- leafcount = (XFS_LBSIZE(mp) -
- (uint)sizeof(xfs_dir_leaf_hdr_t)) /
- ((uint)sizeof(xfs_dir_leaf_entry_t) +
- (uint)sizeof(xfs_dir_leaf_name_t));
- }
- count = shortcount > leafcount ? shortcount : leafcount;
- mp->m_dircook_elog = xfs_da_log2_roundup(count + 1);
- ASSERT(mp->m_dircook_elog <= mp->m_sb.sb_blocklog);
- mp->m_dir_node_ents = mp->m_attr_node_ents =
- (XFS_LBSIZE(mp) - (uint)sizeof(xfs_da_node_hdr_t)) /
- (uint)sizeof(xfs_da_node_entry_t);
- mp->m_dir_magicpct = (XFS_LBSIZE(mp) * 37) / 100;
- mp->m_dirblksize = mp->m_sb.sb_blocksize;
- mp->m_dirblkfsbs = 1;
-}
-
-/*
- * Return 1 if directory contains only "." and "..".
- */
-static int
-xfs_dir_isempty(xfs_inode_t *dp)
-{
- xfs_dir_sf_hdr_t *hdr;
-
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
- if (dp->i_d.di_size == 0)
- return(1);
- if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp))
- return(0);
- hdr = (xfs_dir_sf_hdr_t *)dp->i_df.if_u1.if_data;
- return(hdr->count == 0);
-}
-
-/*
- * Initialize a directory with its "." and ".." entries.
- */
-static int
-xfs_dir_init(xfs_trans_t *trans, xfs_inode_t *dir, xfs_inode_t *parent_dir)
-{
- xfs_da_args_t args;
- int error;
-
- memset((char *)&args, 0, sizeof(args));
- args.dp = dir;
- args.trans = trans;
-
- ASSERT((dir->i_d.di_mode & S_IFMT) == S_IFDIR);
- if ((error = xfs_dir_ino_validate(trans->t_mountp, parent_dir->i_ino)))
- return error;
-
- return(xfs_dir_shortform_create(&args, parent_dir->i_ino));
-}
-
-/*
- * Generic handler routine to add a name to a directory.
- * Transitions directory from shortform to Btree as necessary.
- */
-static int /* error */
-xfs_dir_createname(xfs_trans_t *trans, xfs_inode_t *dp, char *name,
- int namelen, xfs_ino_t inum, xfs_fsblock_t *firstblock,
- xfs_bmap_free_t *flist, xfs_extlen_t total)
-{
- xfs_da_args_t args;
- int retval, newsize, done;
-
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
-
- if ((retval = xfs_dir_ino_validate(trans->t_mountp, inum)))
- return (retval);
-
- XFS_STATS_INC(xs_dir_create);
- /*
- * Fill in the arg structure for this request.
- */
- args.name = name;
- args.namelen = namelen;
- args.hashval = xfs_da_hashname(name, namelen);
- args.inumber = inum;
- args.dp = dp;
- args.firstblock = firstblock;
- args.flist = flist;
- args.total = total;
- args.whichfork = XFS_DATA_FORK;
- args.trans = trans;
- args.justcheck = 0;
- args.addname = args.oknoent = 1;
-
- /*
- * Decide on what work routines to call based on the inode size.
- */
- done = 0;
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
- newsize = XFS_DIR_SF_ENTSIZE_BYNAME(args.namelen);
- if ((dp->i_d.di_size + newsize) <= XFS_IFORK_DSIZE(dp)) {
- retval = xfs_dir_shortform_addname(&args);
- done = 1;
- } else {
- if (total == 0)
- return XFS_ERROR(ENOSPC);
- retval = xfs_dir_shortform_to_leaf(&args);
- done = retval != 0;
- }
- }
- if (!done && xfs_bmap_one_block(dp, XFS_DATA_FORK)) {
- retval = xfs_dir_leaf_addname(&args);
- done = retval != ENOSPC;
- if (!done) {
- if (total == 0)
- return XFS_ERROR(ENOSPC);
- retval = xfs_dir_leaf_to_node(&args);
- done = retval != 0;
- }
- }
- if (!done) {
- retval = xfs_dir_node_addname(&args);
- }
- return(retval);
-}
-
-/*
- * Generic handler routine to check if a name can be added to a directory,
- * without adding any blocks to the directory.
- */
-static int /* error */
-xfs_dir_canenter(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen)
-{
- xfs_da_args_t args;
- int retval, newsize;
-
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
- /*
- * Fill in the arg structure for this request.
- */
- args.name = name;
- args.namelen = namelen;
- args.hashval = xfs_da_hashname(name, namelen);
- args.inumber = 0;
- args.dp = dp;
- args.firstblock = NULL;
- args.flist = NULL;
- args.total = 0;
- args.whichfork = XFS_DATA_FORK;
- args.trans = trans;
- args.justcheck = args.addname = args.oknoent = 1;
-
- /*
- * Decide on what work routines to call based on the inode size.
- */
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
- newsize = XFS_DIR_SF_ENTSIZE_BYNAME(args.namelen);
- if ((dp->i_d.di_size + newsize) <= XFS_IFORK_DSIZE(dp))
- retval = 0;
- else
- retval = XFS_ERROR(ENOSPC);
- } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) {
- retval = xfs_dir_leaf_addname(&args);
- } else {
- retval = xfs_dir_node_addname(&args);
- }
- return(retval);
-}
-
-/*
- * Generic handler routine to remove a name from a directory.
- * Transitions directory from Btree to shortform as necessary.
- */
-static int /* error */
-xfs_dir_removename(xfs_trans_t *trans, xfs_inode_t *dp, char *name,
- int namelen, xfs_ino_t ino, xfs_fsblock_t *firstblock,
- xfs_bmap_free_t *flist, xfs_extlen_t total)
-{
- xfs_da_args_t args;
- int count, totallen, newsize, retval;
-
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
- XFS_STATS_INC(xs_dir_remove);
- /*
- * Fill in the arg structure for this request.
- */
- args.name = name;
- args.namelen = namelen;
- args.hashval = xfs_da_hashname(name, namelen);
- args.inumber = ino;
- args.dp = dp;
- args.firstblock = firstblock;
- args.flist = flist;
- args.total = total;
- args.whichfork = XFS_DATA_FORK;
- args.trans = trans;
- args.justcheck = args.addname = args.oknoent = 0;
-
- /*
- * Decide on what work routines to call based on the inode size.
- */
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
- retval = xfs_dir_shortform_removename(&args);
- } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) {
- retval = xfs_dir_leaf_removename(&args, &count, &totallen);
- if (retval == 0) {
- newsize = XFS_DIR_SF_ALLFIT(count, totallen);
- if (newsize <= XFS_IFORK_DSIZE(dp)) {
- retval = xfs_dir_leaf_to_shortform(&args);
- }
- }
- } else {
- retval = xfs_dir_node_removename(&args);
- }
- return(retval);
-}
-
-static int /* error */
-xfs_dir_lookup(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen,
- xfs_ino_t *inum)
-{
- xfs_da_args_t args;
- int retval;
-
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
-
- XFS_STATS_INC(xs_dir_lookup);
- /*
- * Fill in the arg structure for this request.
- */
- args.name = name;
- args.namelen = namelen;
- args.hashval = xfs_da_hashname(name, namelen);
- args.inumber = 0;
- args.dp = dp;
- args.firstblock = NULL;
- args.flist = NULL;
- args.total = 0;
- args.whichfork = XFS_DATA_FORK;
- args.trans = trans;
- args.justcheck = args.addname = 0;
- args.oknoent = 1;
-
- /*
- * Decide on what work routines to call based on the inode size.
- */
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
- retval = xfs_dir_shortform_lookup(&args);
- } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) {
- retval = xfs_dir_leaf_lookup(&args);
- } else {
- retval = xfs_dir_node_lookup(&args);
- }
- if (retval == EEXIST)
- retval = 0;
- *inum = args.inumber;
- return(retval);
-}
-
-/*
- * Implement readdir.
- */
-static int /* error */
-xfs_dir_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp)
-{
- xfs_dirent_t *dbp;
- int alignment, retval;
- xfs_dir_put_t put;
-
- XFS_STATS_INC(xs_dir_getdents);
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
-
- /*
- * If our caller has given us a single contiguous memory buffer,
- * just work directly within that buffer. If it's in user memory,
- * lock it down first.
- */
- alignment = sizeof(xfs_off_t) - 1;
- if ((uio->uio_iovcnt == 1) &&
- (((__psint_t)uio->uio_iov[0].iov_base & alignment) == 0) &&
- ((uio->uio_iov[0].iov_len & alignment) == 0)) {
- dbp = NULL;
- put = xfs_dir_put_dirent64_direct;
- } else {
- dbp = kmem_alloc(sizeof(*dbp) + MAXNAMELEN, KM_SLEEP);
- put = xfs_dir_put_dirent64_uio;
- }
-
- /*
- * Decide on what work routines to call based on the inode size.
- */
- *eofp = 0;
-
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
- retval = xfs_dir_shortform_getdents(dp, uio, eofp, dbp, put);
- } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) {
- retval = xfs_dir_leaf_getdents(trans, dp, uio, eofp, dbp, put);
- } else {
- retval = xfs_dir_node_getdents(trans, dp, uio, eofp, dbp, put);
- }
- if (dbp != NULL)
- kmem_free(dbp, sizeof(*dbp) + MAXNAMELEN);
-
- return(retval);
-}
-
-static int /* error */
-xfs_dir_replace(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen,
- xfs_ino_t inum, xfs_fsblock_t *firstblock,
- xfs_bmap_free_t *flist, xfs_extlen_t total)
-{
- xfs_da_args_t args;
- int retval;
-
- ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
-
- if ((retval = xfs_dir_ino_validate(trans->t_mountp, inum)))
- return retval;
-
- /*
- * Fill in the arg structure for this request.
- */
- args.name = name;
- args.namelen = namelen;
- args.hashval = xfs_da_hashname(name, namelen);
- args.inumber = inum;
- args.dp = dp;
- args.firstblock = firstblock;
- args.flist = flist;
- args.total = total;
- args.whichfork = XFS_DATA_FORK;
- args.trans = trans;
- args.justcheck = args.addname = args.oknoent = 0;
-
- /*
- * Decide on what work routines to call based on the inode size.
- */
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
- retval = xfs_dir_shortform_replace(&args);
- } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) {
- retval = xfs_dir_leaf_replace(&args);
- } else {
- retval = xfs_dir_node_replace(&args);
- }
-
- return(retval);
-}
-
-static int
-xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp, xfs_dinode_t *dp)
-{
- xfs_ino_t ino;
- int namelen_sum;
- int count;
- xfs_dir_shortform_t *sf;
- xfs_dir_sf_entry_t *sfe;
- int i;
-
-
-
- if ((INT_GET(dp->di_core.di_mode, ARCH_CONVERT) & S_IFMT) != S_IFDIR) {
- return 0;
- }
- if (INT_GET(dp->di_core.di_format, ARCH_CONVERT) != XFS_DINODE_FMT_LOCAL) {
- return 0;
- }
- if (INT_GET(dp->di_core.di_size, ARCH_CONVERT) < sizeof(sf->hdr)) {
- xfs_fs_cmn_err(CE_WARN, mp, "Invalid shortform size: dp 0x%p",
- dp);
- return 1;
- }
- sf = (xfs_dir_shortform_t *)(&dp->di_u.di_dirsf);
- ino = XFS_GET_DIR_INO8(sf->hdr.parent);
- if (xfs_dir_ino_validate(mp, ino))
- return 1;
-
- count = sf->hdr.count;
- if ((count < 0) || ((count * 10) > XFS_LITINO(mp))) {
- xfs_fs_cmn_err(CE_WARN, mp,
- "Invalid shortform count: dp 0x%p", dp);
- return(1);
- }
-
- if (count == 0) {
- return 0;
- }
-
- namelen_sum = 0;
- sfe = &sf->list[0];
- for (i = sf->hdr.count - 1; i >= 0; i--) {
- ino = XFS_GET_DIR_INO8(sfe->inumber);
- xfs_dir_ino_validate(mp, ino);
- if (sfe->namelen >= XFS_LITINO(mp)) {
- xfs_fs_cmn_err(CE_WARN, mp,
- "Invalid shortform namelen: dp 0x%p", dp);
- return 1;
- }
- namelen_sum += sfe->namelen;
- sfe = XFS_DIR_SF_NEXTENTRY(sfe);
- }
- if (namelen_sum >= XFS_LITINO(mp)) {
- xfs_fs_cmn_err(CE_WARN, mp,
- "Invalid shortform namelen: dp 0x%p", dp);
- return 1;
- }
-
- return 0;
-}
-
-/*========================================================================
- * External routines when dirsize == XFS_LBSIZE(dp->i_mount).
- *========================================================================*/
-
-/*
- * Add a name to the leaf directory structure
- * This is the external routine.
- */
-int
-xfs_dir_leaf_addname(xfs_da_args_t *args)
-{
- int index, retval;
- xfs_dabuf_t *bp;
-
- retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
- XFS_DATA_FORK);
- if (retval)
- return(retval);
- ASSERT(bp != NULL);
-
- retval = xfs_dir_leaf_lookup_int(bp, args, &index);
- if (retval == ENOENT)
- retval = xfs_dir_leaf_add(bp, args, index);
- xfs_da_buf_done(bp);
- return(retval);
-}
-
-/*
- * Remove a name from the leaf directory structure
- * This is the external routine.
- */
-STATIC int
-xfs_dir_leaf_removename(xfs_da_args_t *args, int *count, int *totallen)
-{
- xfs_dir_leafblock_t *leaf;
- int index, retval;
- xfs_dabuf_t *bp;
-
- retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
- XFS_DATA_FORK);
- if (retval)
- return(retval);
- ASSERT(bp != NULL);
- leaf = bp->data;
- ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR_LEAF_MAGIC);
- retval = xfs_dir_leaf_lookup_int(bp, args, &index);
- if (retval == EEXIST) {
- (void)xfs_dir_leaf_remove(args->trans, bp, index);
- *count = INT_GET(leaf->hdr.count, ARCH_CONVERT);
- *totallen = INT_GET(leaf->hdr.namebytes, ARCH_CONVERT);
- retval = 0;
- }
- xfs_da_buf_done(bp);
- return(retval);
-}
-
-/*
- * Look up a name in a leaf directory structure.
- * This is the external routine.
- */
-STATIC int
-xfs_dir_leaf_lookup(xfs_da_args_t *args)
-{
- int index, retval;
- xfs_dabuf_t *bp;
-
- retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
- XFS_DATA_FORK);
- if (retval)
- return(retval);
- ASSERT(bp != NULL);
- retval = xfs_dir_leaf_lookup_int(bp, args, &index);
- xfs_da_brelse(args->trans, bp);
- return(retval);
-}
-
-/*
- * Copy out directory entries for getdents(), for leaf directories.
- */
-STATIC int
-xfs_dir_leaf_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio,
- int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put)
-{
- xfs_dabuf_t *bp;
- int retval, eob;
-
- retval = xfs_da_read_buf(dp->i_transp, dp, 0, -1, &bp, XFS_DATA_FORK);
- if (retval)
- return(retval);
- ASSERT(bp != NULL);
- retval = xfs_dir_leaf_getdents_int(bp, dp, 0, uio, &eob, dbp, put, -1);
- xfs_da_brelse(trans, bp);
- *eofp = (eob == 0);
- return(retval);
-}
-
-/*
- * Look up a name in a leaf directory structure, replace the inode number.
- * This is the external routine.
- */
-STATIC int
-xfs_dir_leaf_replace(xfs_da_args_t *args)
-{
- int index, retval;
- xfs_dabuf_t *bp;
- xfs_ino_t inum;
- xfs_dir_leafblock_t *leaf;
- xfs_dir_leaf_entry_t *entry;
- xfs_dir_leaf_name_t *namest;
-
- inum = args->inumber;
- retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
- XFS_DATA_FORK);
- if (retval)
- return(retval);
- ASSERT(bp != NULL);
- retval = xfs_dir_leaf_lookup_int(bp, args, &index);
- if (retval == EEXIST) {
- leaf = bp->data;
- entry = &leaf->entries[index];
- namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT));
- /* XXX - replace assert? */
- XFS_DIR_SF_PUT_DIRINO(&inum, &namest->inumber);
- xfs_da_log_buf(args->trans, bp,
- XFS_DA_LOGRANGE(leaf, namest, sizeof(namest->inumber)));
- xfs_da_buf_done(bp);
- retval = 0;
- } else
- xfs_da_brelse(args->trans, bp);
- return(retval);
-}
-
-
-/*========================================================================
- * External routines when dirsize > XFS_LBSIZE(mp).
- *========================================================================*/
-
-/*
- * Add a name to a Btree-format directory.
- *
- * This will involve walking down the Btree, and may involve splitting
- * leaf nodes and even splitting intermediate nodes up to and including
- * the root node (a special case of an intermediate node).
- */
-STATIC int
-xfs_dir_node_addname(xfs_da_args_t *args)
-{
- xfs_da_state_t *state;
- xfs_da_state_blk_t *blk;
- int retval, error;
-
- /*
- * Fill in bucket of arguments/results/context to carry around.
- */
- state = xfs_da_state_alloc();
- state->args = args;
- state->mp = args->dp->i_mount;
- state->blocksize = state->mp->m_sb.sb_blocksize;
- state->node_ents = state->mp->m_dir_node_ents;
-
- /*
- * Search to see if name already exists, and get back a pointer
- * to where it should go.
- */
- error = xfs_da_node_lookup_int(state, &retval);
- if (error)
- retval = error;
- if (retval != ENOENT)
- goto error;
- blk = &state->path.blk[ state->path.active-1 ];
- ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC);
- retval = xfs_dir_leaf_add(blk->bp, args, blk->index);
- if (retval == 0) {
- /*
- * Addition succeeded, update Btree hashvals.
- */
- if (!args->justcheck)
- xfs_da_fixhashpath(state, &state->path);
- } else {
- /*
- * Addition failed, split as many Btree elements as required.
- */
- if (args->total == 0) {
- ASSERT(retval == ENOSPC);
- goto error;
- }
- retval = xfs_da_split(state);
- }
-error:
- xfs_da_state_free(state);
-
- return(retval);
-}
-
-/*
- * Remove a name from a B-tree directory.
- *
- * This will involve walking down the Btree, and may involve joining
- * leaf nodes and even joining intermediate nodes up to and including
- * the root node (a special case of an intermediate node).
- */
-STATIC int
-xfs_dir_node_removename(xfs_da_args_t *args)
-{
- xfs_da_state_t *state;
- xfs_da_state_blk_t *blk;
- int retval, error;
-
- state = xfs_da_state_alloc();
- state->args = args;
- state->mp = args->dp->i_mount;
- state->blocksize = state->mp->m_sb.sb_blocksize;
- state->node_ents = state->mp->m_dir_node_ents;
-
- /*
- * Search to see if name exists, and get back a pointer to it.
- */
- error = xfs_da_node_lookup_int(state, &retval);
- if (error)
- retval = error;
- if (retval != EEXIST) {
- xfs_da_state_free(state);
- return(retval);
- }
-
- /*
- * Remove the name and update the hashvals in the tree.
- */
- blk = &state->path.blk[ state->path.active-1 ];
- ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC);
- retval = xfs_dir_leaf_remove(args->trans, blk->bp, blk->index);
- xfs_da_fixhashpath(state, &state->path);
-
- /*
- * Check to see if the tree needs to be collapsed.
- */
- error = 0;
- if (retval) {
- error = xfs_da_join(state);
- }
-
- xfs_da_state_free(state);
- if (error)
- return(error);
- return(0);
-}
-
-/*
- * Look up a filename in a int directory.
- * Use an internal routine to actually do all the work.
- */
-STATIC int
-xfs_dir_node_lookup(xfs_da_args_t *args)
-{
- xfs_da_state_t *state;
- int retval, error, i;
-
- state = xfs_da_state_alloc();
- state->args = args;
- state->mp = args->dp->i_mount;
- state->blocksize = state->mp->m_sb.sb_blocksize;
- state->node_ents = state->mp->m_dir_node_ents;
-
- /*
- * Search to see if name exists,
- * and get back a pointer to it.
- */
- error = xfs_da_node_lookup_int(state, &retval);
- if (error) {
- retval = error;
- }
-
- /*
- * If not in a transaction, we have to release all the buffers.
- */
- for (i = 0; i < state->path.active; i++) {
- xfs_da_brelse(args->trans, state->path.blk[i].bp);
- state->path.blk[i].bp = NULL;
- }
-
- xfs_da_state_free(state);
- return(retval);
-}
-
-STATIC int
-xfs_dir_node_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio,
- int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put)
-{
- xfs_da_intnode_t *node;
- xfs_da_node_entry_t *btree;
- xfs_dir_leafblock_t *leaf = NULL;
- xfs_dablk_t bno, nextbno;
- xfs_dahash_t cookhash;
- xfs_mount_t *mp;
- int error, eob, i;
- xfs_dabuf_t *bp;
- xfs_daddr_t nextda;
-
- /*
- * Pick up our context.
- */
- mp = dp->i_mount;
- bp = NULL;
- bno = XFS_DA_COOKIE_BNO(mp, uio->uio_offset);
- cookhash = XFS_DA_COOKIE_HASH(mp, uio->uio_offset);
-
- xfs_dir_trace_g_du("node: start", dp, uio);
-
- /*
- * Re-find our place, even if we're confused about what our place is.
- *
- * First we check the block number from the magic cookie, it is a
- * cache of where we ended last time. If we find a leaf block, and
- * the starting hashval in that block is less than our desired
- * hashval, then we run with it.
- */
- if (bno > 0) {
- error = xfs_da_read_buf(trans, dp, bno, -2, &bp, XFS_DATA_FORK);
- if ((error != 0) && (error != EFSCORRUPTED))
- return(error);
- if (bp)
- leaf = bp->data;
- if (bp && be16_to_cpu(leaf->hdr.info.magic) != XFS_DIR_LEAF_MAGIC) {
- xfs_dir_trace_g_dub("node: block not a leaf",
- dp, uio, bno);
- xfs_da_brelse(trans, bp);
- bp = NULL;
- }
- if (bp && INT_GET(leaf->entries[0].hashval, ARCH_CONVERT) > cookhash) {
- xfs_dir_trace_g_dub("node: leaf hash too large",
- dp, uio, bno);
- xfs_da_brelse(trans, bp);
- bp = NULL;
- }
- if (bp &&
- cookhash > INT_GET(leaf->entries[INT_GET(leaf->hdr.count, ARCH_CONVERT) - 1].hashval, ARCH_CONVERT)) {
- xfs_dir_trace_g_dub("node: leaf hash too small",
- dp, uio, bno);
- xfs_da_brelse(trans, bp);
- bp = NULL;
- }
- }
-
- /*
- * If we did not find a leaf block from the blockno in the cookie,
- * or we there was no blockno in the cookie (eg: first time thru),
- * the we start at the top of the Btree and re-find our hashval.
- */
- if (bp == NULL) {
- xfs_dir_trace_g_du("node: start at root" , dp, uio);
- bno = 0;
- for (;;) {
- error = xfs_da_read_buf(trans, dp, bno, -1, &bp,
- XFS_DATA_FORK);
- if (error)
- return(error);
- if (bp == NULL)
- return(XFS_ERROR(EFSCORRUPTED));
- node = bp->data;
- if (be16_to_cpu(node->hdr.info.magic) != XFS_DA_NODE_MAGIC)
- break;
- btree = &node->btree[0];
- xfs_dir_trace_g_dun("node: node detail", dp, uio, node);
- for (i = 0; i < be16_to_cpu(node->hdr.count); btree++, i++) {
- if (be32_to_cpu(btree->hashval) >= cookhash) {
- bno = be32_to_cpu(btree->before);
- break;
- }
- }
- if (i == be16_to_cpu(node->hdr.count)) {
- xfs_da_brelse(trans, bp);
- xfs_dir_trace_g_du("node: hash beyond EOF",
- dp, uio);
- uio->uio_offset = XFS_DA_MAKE_COOKIE(mp, 0, 0,
- XFS_DA_MAXHASH);
- *eofp = 1;
- return(0);
- }
- xfs_dir_trace_g_dub("node: going to block",
- dp, uio, bno);
- xfs_da_brelse(trans, bp);
- }
- }
- ASSERT(cookhash != XFS_DA_MAXHASH);
-
- /*
- * We've dropped down to the (first) leaf block that contains the
- * hashval we are interested in. Continue rolling upward thru the
- * leaf blocks until we fill up our buffer.
- */
- for (;;) {
- leaf = bp->data;
- if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_DIR_LEAF_MAGIC)) {
- xfs_dir_trace_g_dul("node: not a leaf", dp, uio, leaf);
- xfs_da_brelse(trans, bp);
- XFS_CORRUPTION_ERROR("xfs_dir_node_getdents(1)",
- XFS_ERRLEVEL_LOW, mp, leaf);
- return XFS_ERROR(EFSCORRUPTED);
- }
- xfs_dir_trace_g_dul("node: leaf detail", dp, uio, leaf);
- if ((nextbno = be32_to_cpu(leaf->hdr.info.forw))) {
- nextda = xfs_da_reada_buf(trans, dp, nextbno,
- XFS_DATA_FORK);
- } else
- nextda = -1;
- error = xfs_dir_leaf_getdents_int(bp, dp, bno, uio, &eob, dbp,
- put, nextda);
- xfs_da_brelse(trans, bp);
- bno = nextbno;
- if (eob) {
- xfs_dir_trace_g_dub("node: E-O-B", dp, uio, bno);
- *eofp = 0;
- return(error);
- }
- if (bno == 0)
- break;
- error = xfs_da_read_buf(trans, dp, bno, nextda, &bp,
- XFS_DATA_FORK);
- if (error)
- return(error);
- if (unlikely(bp == NULL)) {
- XFS_ERROR_REPORT("xfs_dir_node_getdents(2)",
- XFS_ERRLEVEL_LOW, mp);
- return(XFS_ERROR(EFSCORRUPTED));
- }
- }
- *eofp = 1;
- xfs_dir_trace_g_du("node: E-O-F", dp, uio);
- return(0);
-}
-
-/*
- * Look up a filename in an int directory, replace the inode number.
- * Use an internal routine to actually do the lookup.
- */
-STATIC int
-xfs_dir_node_replace(xfs_da_args_t *args)
-{
- xfs_da_state_t *state;
- xfs_da_state_blk_t *blk;
- xfs_dir_leafblock_t *leaf;
- xfs_dir_leaf_entry_t *entry;
- xfs_dir_leaf_name_t *namest;
- xfs_ino_t inum;
- int retval, error, i;
- xfs_dabuf_t *bp;
-
- state = xfs_da_state_alloc();
- state->args = args;
- state->mp = args->dp->i_mount;
- state->blocksize = state->mp->m_sb.sb_blocksize;
- state->node_ents = state->mp->m_dir_node_ents;
- inum = args->inumber;
-
- /*
- * Search to see if name exists,
- * and get back a pointer to it.
- */
- error = xfs_da_node_lookup_int(state, &retval);
- if (error) {
- retval = error;
- }
-
- if (retval == EEXIST) {
- blk = &state->path.blk[state->path.active - 1];
- ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC);
- bp = blk->bp;
- leaf = bp->data;
- entry = &leaf->entries[blk->index];
- namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT));
- /* XXX - replace assert ? */
- XFS_DIR_SF_PUT_DIRINO(&inum, &namest->inumber);
- xfs_da_log_buf(args->trans, bp,
- XFS_DA_LOGRANGE(leaf, namest, sizeof(namest->inumber)));
- xfs_da_buf_done(bp);
- blk->bp = NULL;
- retval = 0;
- } else {
- i = state->path.active - 1;
- xfs_da_brelse(args->trans, state->path.blk[i].bp);
- state->path.blk[i].bp = NULL;
- }
- for (i = 0; i < state->path.active - 1; i++) {
- xfs_da_brelse(args->trans, state->path.blk[i].bp);
- state->path.blk[i].bp = NULL;
- }
-
- xfs_da_state_free(state);
- return(retval);
-}
-
-#if defined(XFS_DIR_TRACE)
-/*
- * Add a trace buffer entry for an inode and a uio.
- */
-void
-xfs_dir_trace_g_du(char *where, xfs_inode_t *dp, uio_t *uio)
-{
- xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DU, where,
- (void *)dp, (void *)dp->i_mount,
- (void *)((unsigned long)(uio->uio_offset >> 32)),
- (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)),
- (void *)(unsigned long)uio->uio_resid,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL);
-}
-
-/*
- * Add a trace buffer entry for an inode and a uio.
- */
-void
-xfs_dir_trace_g_dub(char *where, xfs_inode_t *dp, uio_t *uio, xfs_dablk_t bno)
-{
- xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUB, where,
- (void *)dp, (void *)dp->i_mount,
- (void *)((unsigned long)(uio->uio_offset >> 32)),
- (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)),
- (void *)(unsigned long)uio->uio_resid,
- (void *)(unsigned long)bno,
- NULL, NULL, NULL, NULL, NULL, NULL);
-}
-
-/*
- * Add a trace buffer entry for an inode and a uio.
- */
-void
-xfs_dir_trace_g_dun(char *where, xfs_inode_t *dp, uio_t *uio,
- xfs_da_intnode_t *node)
-{
- int last = be16_to_cpu(node->hdr.count) - 1;
-
- xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUN, where,
- (void *)dp, (void *)dp->i_mount,
- (void *)((unsigned long)(uio->uio_offset >> 32)),
- (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)),
- (void *)(unsigned long)uio->uio_resid,
- (void *)(unsigned long)be32_to_cpu(node->hdr.info.forw),
- (void *)(unsigned long)
- be16_to_cpu(node->hdr.count),
- (void *)(unsigned long)
- be32_to_cpu(node->btree[0].hashval),
- (void *)(unsigned long)
- be32_to_cpu(node->btree[last].hashval),
- NULL, NULL, NULL);
-}
-
-/*
- * Add a trace buffer entry for an inode and a uio.
- */
-void
-xfs_dir_trace_g_dul(char *where, xfs_inode_t *dp, uio_t *uio,
- xfs_dir_leafblock_t *leaf)
-{
- int last = INT_GET(leaf->hdr.count, ARCH_CONVERT) - 1;
-
- xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUL, where,
- (void *)dp, (void *)dp->i_mount,
- (void *)((unsigned long)(uio->uio_offset >> 32)),
- (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)),
- (void *)(unsigned long)uio->uio_resid,
- (void *)(unsigned long)be32_to_cpu(leaf->hdr.info.forw),
- (void *)(unsigned long)
- INT_GET(leaf->hdr.count, ARCH_CONVERT),
- (void *)(unsigned long)
- INT_GET(leaf->entries[0].hashval, ARCH_CONVERT),
- (void *)(unsigned long)
- INT_GET(leaf->entries[last].hashval, ARCH_CONVERT),
- NULL, NULL, NULL);
-}
-
-/*
- * Add a trace buffer entry for an inode and a uio.
- */
-void
-xfs_dir_trace_g_due(char *where, xfs_inode_t *dp, uio_t *uio,
- xfs_dir_leaf_entry_t *entry)
-{
- xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUE, where,
- (void *)dp, (void *)dp->i_mount,
- (void *)((unsigned long)(uio->uio_offset >> 32)),
- (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)),
- (void *)(unsigned long)uio->uio_resid,
- (void *)(unsigned long)
- INT_GET(entry->hashval, ARCH_CONVERT),
- NULL, NULL, NULL, NULL, NULL, NULL);
-}
-
-/*
- * Add a trace buffer entry for an inode and a uio.
- */
-void
-xfs_dir_trace_g_duc(char *where, xfs_inode_t *dp, uio_t *uio, xfs_off_t cookie)
-{
- xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUC, where,
- (void *)dp, (void *)dp->i_mount,
- (void *)((unsigned long)(uio->uio_offset >> 32)),
- (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)),
- (void *)(unsigned long)uio->uio_resid,
- (void *)((unsigned long)(cookie >> 32)),
- (void *)((unsigned long)(cookie & 0xFFFFFFFF)),
- NULL, NULL, NULL, NULL, NULL);
-}
-
-/*
- * Add a trace buffer entry for the arguments given to the routine,
- * generic form.
- */
-void
-xfs_dir_trace_enter(int type, char *where,
- void * a0, void * a1,
- void * a2, void * a3,
- void * a4, void * a5,
- void * a6, void * a7,
- void * a8, void * a9,
- void * a10, void * a11)
-{
- ASSERT(xfs_dir_trace_buf);
- ktrace_enter(xfs_dir_trace_buf, (void *)(unsigned long)type,
- (void *)where,
- (void *)a0, (void *)a1, (void *)a2,
- (void *)a3, (void *)a4, (void *)a5,
- (void *)a6, (void *)a7, (void *)a8,
- (void *)a9, (void *)a10, (void *)a11,
- NULL, NULL);
-}
-#endif /* XFS_DIR_TRACE */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-08 01:07:54 +0000