+// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 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.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
*/
+#include "libxfs_priv.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_trans.h"
+#include "xfs_bmap.h"
+#include "xfs_dir2.h"
+#include "xfs_dir2_priv.h"
+#include "xfs_errortag.h"
+#include "xfs_trace.h"
+
+const struct xfs_name xfs_name_dotdot = {
+ .name = (const unsigned char *)"..",
+ .len = 2,
+ .type = XFS_DIR3_FT_DIR,
+};
/*
- * XFS v2 directory implmentation.
- * Top-level and utility routines.
+ * Convert inode mode to directory entry filetype
*/
+unsigned char
+xfs_mode_to_ftype(
+ int mode)
+{
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ return XFS_DIR3_FT_REG_FILE;
+ case S_IFDIR:
+ return XFS_DIR3_FT_DIR;
+ case S_IFCHR:
+ return XFS_DIR3_FT_CHRDEV;
+ case S_IFBLK:
+ return XFS_DIR3_FT_BLKDEV;
+ case S_IFIFO:
+ return XFS_DIR3_FT_FIFO;
+ case S_IFSOCK:
+ return XFS_DIR3_FT_SOCK;
+ case S_IFLNK:
+ return XFS_DIR3_FT_SYMLINK;
+ default:
+ return XFS_DIR3_FT_UNKNOWN;
+ }
+}
+
+/*
+ * ASCII case-insensitive (ie. A-Z) support for directories that was
+ * used in IRIX.
+ */
+xfs_dahash_t
+xfs_ascii_ci_hashname(
+ const struct xfs_name *name)
+{
+ xfs_dahash_t hash;
+ int i;
+
+ for (i = 0, hash = 0; i < name->len; i++)
+ hash = xfs_ascii_ci_xfrm(name->name[i]) ^ rol32(hash, 7);
+
+ return hash;
+}
+
+enum xfs_dacmp
+xfs_ascii_ci_compname(
+ struct xfs_da_args *args,
+ const unsigned char *name,
+ int len)
+{
+ enum xfs_dacmp result;
+ int i;
+
+ if (args->namelen != len)
+ return XFS_CMP_DIFFERENT;
+
+ result = XFS_CMP_EXACT;
+ for (i = 0; i < len; i++) {
+ if (args->name[i] == name[i])
+ continue;
+ if (xfs_ascii_ci_xfrm(args->name[i]) !=
+ xfs_ascii_ci_xfrm(name[i]))
+ return XFS_CMP_DIFFERENT;
+ result = XFS_CMP_CASE;
+ }
+
+ return result;
+}
+
+int
+xfs_da_mount(
+ struct xfs_mount *mp)
+{
+ struct xfs_da_geometry *dageo;
+
+
+ ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
+ ASSERT(xfs_dir2_dirblock_bytes(&mp->m_sb) <= XFS_MAX_BLOCKSIZE);
+
+ mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry),
+ KM_MAYFAIL);
+ mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry),
+ KM_MAYFAIL);
+ if (!mp->m_dir_geo || !mp->m_attr_geo) {
+ kmem_free(mp->m_dir_geo);
+ kmem_free(mp->m_attr_geo);
+ return -ENOMEM;
+ }
+
+ /* set up directory geometry */
+ dageo = mp->m_dir_geo;
+ dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog;
+ dageo->fsblog = mp->m_sb.sb_blocklog;
+ dageo->blksize = xfs_dir2_dirblock_bytes(&mp->m_sb);
+ dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog;
+ if (xfs_has_crc(mp)) {
+ dageo->node_hdr_size = sizeof(struct xfs_da3_node_hdr);
+ dageo->leaf_hdr_size = sizeof(struct xfs_dir3_leaf_hdr);
+ dageo->free_hdr_size = sizeof(struct xfs_dir3_free_hdr);
+ dageo->data_entry_offset =
+ sizeof(struct xfs_dir3_data_hdr);
+ } else {
+ dageo->node_hdr_size = sizeof(struct xfs_da_node_hdr);
+ dageo->leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr);
+ dageo->free_hdr_size = sizeof(struct xfs_dir2_free_hdr);
+ dageo->data_entry_offset =
+ sizeof(struct xfs_dir2_data_hdr);
+ }
+ dageo->leaf_max_ents = (dageo->blksize - dageo->leaf_hdr_size) /
+ sizeof(struct xfs_dir2_leaf_entry);
+ dageo->free_max_bests = (dageo->blksize - dageo->free_hdr_size) /
+ sizeof(xfs_dir2_data_off_t);
+
+ dageo->data_first_offset = dageo->data_entry_offset +
+ xfs_dir2_data_entsize(mp, 1) +
+ xfs_dir2_data_entsize(mp, 2);
-#include <xfs.h>
+ /*
+ * Now we've set up the block conversion variables, we can calculate the
+ * segment block constants using the geometry structure.
+ */
+ dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET);
+ dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET);
+ dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET);
+ dageo->node_ents = (dageo->blksize - dageo->node_hdr_size) /
+ (uint)sizeof(xfs_da_node_entry_t);
+ dageo->max_extents = (XFS_DIR2_MAX_SPACES * XFS_DIR2_SPACE_SIZE) >>
+ mp->m_sb.sb_blocklog;
+ dageo->magicpct = (dageo->blksize * 37) / 100;
+ /* set up attribute geometry - single fsb only */
+ dageo = mp->m_attr_geo;
+ dageo->blklog = mp->m_sb.sb_blocklog;
+ dageo->fsblog = mp->m_sb.sb_blocklog;
+ dageo->blksize = 1 << dageo->blklog;
+ dageo->fsbcount = 1;
+ dageo->node_hdr_size = mp->m_dir_geo->node_hdr_size;
+ dageo->node_ents = (dageo->blksize - dageo->node_hdr_size) /
+ (uint)sizeof(xfs_da_node_entry_t);
+
+ if (xfs_has_large_extent_counts(mp))
+ dageo->max_extents = XFS_MAX_EXTCNT_ATTR_FORK_LARGE;
+ else
+ dageo->max_extents = XFS_MAX_EXTCNT_ATTR_FORK_SMALL;
+
+ dageo->magicpct = (dageo->blksize * 37) / 100;
+ return 0;
+}
+
+void
+xfs_da_unmount(
+ struct xfs_mount *mp)
+{
+ kmem_free(mp->m_dir_geo);
+ kmem_free(mp->m_attr_geo);
+}
/*
- * Initialize directory-related fields in the mount structure.
+ * Return 1 if directory contains only "." and "..".
*/
-void
-xfs_dir2_mount(
- xfs_mount_t *mp) /* filesystem mount point */
+int
+xfs_dir_isempty(
+ xfs_inode_t *dp)
{
- mp->m_dirversion = 2;
- ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <=
- XFS_MAX_BLOCKSIZE);
- mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog);
- mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog;
- mp->m_dirdatablk = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_DATA_FIRSTDB(mp));
- mp->m_dirleafblk = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_LEAF_FIRSTDB(mp));
- mp->m_dirfreeblk = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_FREE_FIRSTDB(mp));
- mp->m_da_node_ents =
- (mp->m_dirblksize - (uint)sizeof(xfs_da_node_hdr_t)) /
- (uint)sizeof(xfs_da_node_entry_t);
- mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100;
+ xfs_dir2_sf_hdr_t *sfp;
+
+ ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
+ if (dp->i_disk_size == 0) /* might happen during shutdown. */
+ return 1;
+ if (dp->i_disk_size > xfs_inode_data_fork_size(dp))
+ return 0;
+ sfp = dp->i_df.if_data;
+ return !sfp->count;
+}
+
+/*
+ * Validate a given inode number.
+ */
+int
+xfs_dir_ino_validate(
+ xfs_mount_t *mp,
+ xfs_ino_t ino)
+{
+ bool ino_ok = xfs_verify_dir_ino(mp, ino);
+
+ if (XFS_IS_CORRUPT(mp, !ino_ok) ||
+ XFS_TEST_ERROR(false, mp, XFS_ERRTAG_DIR_INO_VALIDATE)) {
+ xfs_warn(mp, "Invalid inode number 0x%Lx",
+ (unsigned long long) ino);
+ return -EFSCORRUPTED;
+ }
+ return 0;
}
/*
* Initialize a directory with its "." and ".." entries.
*/
-int /* error */
-xfs_dir2_init(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- xfs_inode_t *pdp) /* incore parent directory inode */
+int
+xfs_dir_init(
+ xfs_trans_t *tp,
+ xfs_inode_t *dp,
+ xfs_inode_t *pdp)
{
- xfs_da_args_t args; /* operation arguments */
- int error; /* error return value */
-
- bzero((char *)&args, sizeof(args));
- args.dp = dp;
- args.trans = tp;
- ASSERT((dp->i_d.di_mode & IFMT) == IFDIR);
- if ((error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino))) {
+ struct xfs_da_args *args;
+ int error;
+
+ ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
+ error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino);
+ if (error)
return error;
- }
- return xfs_dir2_sf_create(&args, pdp->i_ino);
+
+ args = kmem_zalloc(sizeof(*args), KM_NOFS);
+ if (!args)
+ return -ENOMEM;
+
+ args->geo = dp->i_mount->m_dir_geo;
+ args->dp = dp;
+ args->trans = tp;
+ error = xfs_dir2_sf_create(args, pdp->i_ino);
+ kmem_free(args);
+ return error;
}
/*
- Enter a name in a directory.
+ * Enter a name in a directory, or check for available space.
+ * If inum is 0, only the available space test is performed.
*/
-STATIC int /* error */
-xfs_dir2_createname(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- char *name, /* new entry name */
- int namelen, /* new entry name length */
+int
+xfs_dir_createname(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ const struct xfs_name *name,
xfs_ino_t inum, /* new entry inode number */
- xfs_fsblock_t *first, /* bmap's firstblock */
- xfs_bmap_free_t *flist, /* bmap's freeblock list */
xfs_extlen_t total) /* bmap's total block count */
{
- xfs_da_args_t args; /* operation arguments */
- int rval; /* return value */
- int v; /* type-checking value */
+ struct xfs_da_args *args;
+ int rval;
+ bool v;
- ASSERT((dp->i_d.di_mode & IFMT) == IFDIR);
- if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) {
- return rval;
+ ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
+
+ if (inum) {
+ rval = xfs_dir_ino_validate(tp->t_mountp, inum);
+ if (rval)
+ return rval;
+ XFS_STATS_INC(dp->i_mount, xs_dir_create);
}
- XFS_STATS_INC(xfsstats.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 = first;
- args.flist = flist;
- args.total = total;
- args.whichfork = XFS_DATA_FORK;
- args.trans = tp;
- args.justcheck = 0;
- 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)
- rval = xfs_dir2_sf_addname(&args);
- else if ((rval = xfs_dir2_isblock(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_block_addname(&args);
- else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_leaf_addname(&args);
+
+ args = kmem_zalloc(sizeof(*args), KM_NOFS);
+ if (!args)
+ return -ENOMEM;
+
+ args->geo = dp->i_mount->m_dir_geo;
+ args->name = name->name;
+ args->namelen = name->len;
+ args->filetype = name->type;
+ args->hashval = xfs_dir2_hashname(dp->i_mount, name);
+ args->inumber = inum;
+ args->dp = dp;
+ args->total = total;
+ args->whichfork = XFS_DATA_FORK;
+ args->trans = tp;
+ args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
+ if (!inum)
+ args->op_flags |= XFS_DA_OP_JUSTCHECK;
+
+ if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
+ rval = xfs_dir2_sf_addname(args);
+ goto out_free;
+ }
+
+ rval = xfs_dir2_isblock(args, &v);
+ if (rval)
+ goto out_free;
+ if (v) {
+ rval = xfs_dir2_block_addname(args);
+ goto out_free;
+ }
+
+ rval = xfs_dir2_isleaf(args, &v);
+ if (rval)
+ goto out_free;
+ if (v)
+ rval = xfs_dir2_leaf_addname(args);
else
- rval = xfs_dir2_node_addname(&args);
+ rval = xfs_dir2_node_addname(args);
+
+out_free:
+ kmem_free(args);
return rval;
}
+/*
+ * If doing a CI lookup and case-insensitive match, dup actual name into
+ * args.value. Return EEXIST for success (ie. name found) or an error.
+ */
+int
+xfs_dir_cilookup_result(
+ struct xfs_da_args *args,
+ const unsigned char *name,
+ int len)
+{
+ if (args->cmpresult == XFS_CMP_DIFFERENT)
+ return -ENOENT;
+ if (args->cmpresult != XFS_CMP_CASE ||
+ !(args->op_flags & XFS_DA_OP_CILOOKUP))
+ return -EEXIST;
+
+ args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL);
+ if (!args->value)
+ return -ENOMEM;
+
+ memcpy(args->value, name, len);
+ args->valuelen = len;
+ return -EEXIST;
+}
+
/*
* Lookup a name in a directory, give back the inode number.
+ * If ci_name is not NULL, returns the actual name in ci_name if it differs
+ * to name, or ci_name->name is set to NULL for an exact match.
*/
-STATIC int /* error */
-xfs_dir2_lookup(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- char *name, /* lookup name */
- int namelen, /* lookup name length */
- xfs_ino_t *inum) /* out: inode number */
+
+int
+xfs_dir_lookup(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ const struct xfs_name *name,
+ xfs_ino_t *inum, /* out: inode number */
+ struct xfs_name *ci_name) /* out: actual name if CI match */
{
- xfs_da_args_t args; /* operation arguments */
- int rval; /* return value */
- int v; /* type-checking value */
+ struct xfs_da_args *args;
+ int rval;
+ bool v;
+ int lock_mode;
+
+ ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
+ XFS_STATS_INC(dp->i_mount, xs_dir_lookup);
- ASSERT((dp->i_d.di_mode & IFMT) == IFDIR);
- if (namelen >= MAXNAMELEN) {
- return XFS_ERROR(EINVAL);
- }
- XFS_STATS_INC(xfsstats.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 = tp;
- args.justcheck = args.addname = 0;
- args.oknoent = 1;
/*
- * Decide on what work routines to call based on the inode size.
+ * We need to use KM_NOFS here so that lockdep will not throw false
+ * positive deadlock warnings on a non-transactional lookup path. It is
+ * safe to recurse into inode recalim in that case, but lockdep can't
+ * easily be taught about it. Hence KM_NOFS avoids having to add more
+ * lockdep Doing this avoids having to add a bunch of lockdep class
+ * annotations into the reclaim path for the ilock.
*/
- if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
- rval = xfs_dir2_sf_lookup(&args);
- else if ((rval = xfs_dir2_isblock(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_block_lookup(&args);
- else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_leaf_lookup(&args);
+ args = kmem_zalloc(sizeof(*args), KM_NOFS);
+ args->geo = dp->i_mount->m_dir_geo;
+ args->name = name->name;
+ args->namelen = name->len;
+ args->filetype = name->type;
+ args->hashval = xfs_dir2_hashname(dp->i_mount, name);
+ args->dp = dp;
+ args->whichfork = XFS_DATA_FORK;
+ args->trans = tp;
+ args->op_flags = XFS_DA_OP_OKNOENT;
+ if (ci_name)
+ args->op_flags |= XFS_DA_OP_CILOOKUP;
+
+ lock_mode = xfs_ilock_data_map_shared(dp);
+ if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
+ rval = xfs_dir2_sf_lookup(args);
+ goto out_check_rval;
+ }
+
+ rval = xfs_dir2_isblock(args, &v);
+ if (rval)
+ goto out_free;
+ if (v) {
+ rval = xfs_dir2_block_lookup(args);
+ goto out_check_rval;
+ }
+
+ rval = xfs_dir2_isleaf(args, &v);
+ if (rval)
+ goto out_free;
+ if (v)
+ rval = xfs_dir2_leaf_lookup(args);
else
- rval = xfs_dir2_node_lookup(&args);
- if (rval == EEXIST)
+ rval = xfs_dir2_node_lookup(args);
+
+out_check_rval:
+ if (rval == -EEXIST)
rval = 0;
- if (rval == 0)
- *inum = args.inumber;
+ if (!rval) {
+ *inum = args->inumber;
+ if (ci_name) {
+ ci_name->name = args->value;
+ ci_name->len = args->valuelen;
+ }
+ }
+out_free:
+ xfs_iunlock(dp, lock_mode);
+ kmem_free(args);
return rval;
}
/*
* Remove an entry from a directory.
*/
-STATIC int /* error */
-xfs_dir2_removename(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- char *name, /* name of entry to remove */
- int namelen, /* name length of entry to remove */
- xfs_ino_t ino, /* inode number of entry to remove */
- xfs_fsblock_t *first, /* bmap's firstblock */
- xfs_bmap_free_t *flist, /* bmap's freeblock list */
- xfs_extlen_t total) /* bmap's total block count */
+int
+xfs_dir_removename(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ struct xfs_name *name,
+ xfs_ino_t ino,
+ xfs_extlen_t total) /* bmap's total block count */
{
- xfs_da_args_t args; /* operation arguments */
- int rval; /* return value */
- int v; /* type-checking value */
+ struct xfs_da_args *args;
+ int rval;
+ bool v;
- ASSERT((dp->i_d.di_mode & IFMT) == IFDIR);
- XFS_STATS_INC(xfsstats.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 = first;
- args.flist = flist;
- args.total = total;
- args.whichfork = XFS_DATA_FORK;
- args.trans = tp;
- 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)
- rval = xfs_dir2_sf_removename(&args);
- else if ((rval = xfs_dir2_isblock(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_block_removename(&args);
- else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_leaf_removename(&args);
+ ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
+ XFS_STATS_INC(dp->i_mount, xs_dir_remove);
+
+ args = kmem_zalloc(sizeof(*args), KM_NOFS);
+ if (!args)
+ return -ENOMEM;
+
+ args->geo = dp->i_mount->m_dir_geo;
+ args->name = name->name;
+ args->namelen = name->len;
+ args->filetype = name->type;
+ args->hashval = xfs_dir2_hashname(dp->i_mount, name);
+ args->inumber = ino;
+ args->dp = dp;
+ args->total = total;
+ args->whichfork = XFS_DATA_FORK;
+ args->trans = tp;
+
+ if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
+ rval = xfs_dir2_sf_removename(args);
+ goto out_free;
+ }
+
+ rval = xfs_dir2_isblock(args, &v);
+ if (rval)
+ goto out_free;
+ if (v) {
+ rval = xfs_dir2_block_removename(args);
+ goto out_free;
+ }
+
+ rval = xfs_dir2_isleaf(args, &v);
+ if (rval)
+ goto out_free;
+ if (v)
+ rval = xfs_dir2_leaf_removename(args);
else
- rval = xfs_dir2_node_removename(&args);
+ rval = xfs_dir2_node_removename(args);
+out_free:
+ kmem_free(args);
return rval;
}
/*
* Replace the inode number of a directory entry.
*/
-STATIC int /* error */
-xfs_dir2_replace(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- char *name, /* name of entry to replace */
- int namelen, /* name length of entry to replace */
- xfs_ino_t inum, /* new inode number */
- xfs_fsblock_t *first, /* bmap's firstblock */
- xfs_bmap_free_t *flist, /* bmap's freeblock list */
- xfs_extlen_t total) /* bmap's total block count */
+int
+xfs_dir_replace(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ const struct xfs_name *name, /* name of entry to replace */
+ xfs_ino_t inum, /* new inode number */
+ xfs_extlen_t total) /* bmap's total block count */
{
- xfs_da_args_t args; /* operation arguments */
- int rval; /* return value */
- int v; /* type-checking value */
+ struct xfs_da_args *args;
+ int rval;
+ bool v;
- ASSERT((dp->i_d.di_mode & IFMT) == IFDIR);
- if (namelen >= MAXNAMELEN) {
- return XFS_ERROR(EINVAL);
- }
- if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum))) {
+ ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
+
+ rval = xfs_dir_ino_validate(tp->t_mountp, inum);
+ if (rval)
return rval;
+
+ args = kmem_zalloc(sizeof(*args), KM_NOFS);
+ if (!args)
+ return -ENOMEM;
+
+ args->geo = dp->i_mount->m_dir_geo;
+ args->name = name->name;
+ args->namelen = name->len;
+ args->filetype = name->type;
+ args->hashval = xfs_dir2_hashname(dp->i_mount, name);
+ args->inumber = inum;
+ args->dp = dp;
+ args->total = total;
+ args->whichfork = XFS_DATA_FORK;
+ args->trans = tp;
+
+ if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
+ rval = xfs_dir2_sf_replace(args);
+ goto out_free;
}
- /*
- * 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 = first;
- args.flist = flist;
- args.total = total;
- args.whichfork = XFS_DATA_FORK;
- args.trans = tp;
- 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)
- rval = xfs_dir2_sf_replace(&args);
- else if ((rval = xfs_dir2_isblock(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_block_replace(&args);
- else if ((rval = xfs_dir2_isleaf(tp, dp, &v))) {
- return rval;
- } else if (v)
- rval = xfs_dir2_leaf_replace(&args);
+
+ rval = xfs_dir2_isblock(args, &v);
+ if (rval)
+ goto out_free;
+ if (v) {
+ rval = xfs_dir2_block_replace(args);
+ goto out_free;
+ }
+
+ rval = xfs_dir2_isleaf(args, &v);
+ if (rval)
+ goto out_free;
+ if (v)
+ rval = xfs_dir2_leaf_replace(args);
else
- rval = xfs_dir2_node_replace(&args);
+ rval = xfs_dir2_node_replace(args);
+out_free:
+ kmem_free(args);
return rval;
}
+/*
+ * See if this entry can be added to the directory without allocating space.
+ */
+int
+xfs_dir_canenter(
+ xfs_trans_t *tp,
+ xfs_inode_t *dp,
+ struct xfs_name *name) /* name of entry to add */
+{
+ return xfs_dir_createname(tp, dp, name, 0, 0);
+}
+
/*
* Utility routines.
*/
/*
* Add a block to the directory.
- * This routine is for data and free blocks, not leaf/node blocks
- * which are handled by xfs_da_grow_inode.
+ *
+ * This routine is for data and free blocks, not leaf/node blocks which are
+ * handled by xfs_da_grow_inode.
*/
-int /* error */
+int
xfs_dir2_grow_inode(
- xfs_da_args_t *args, /* operation arguments */
- int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */
- xfs_dir2_db_t *dbp) /* out: block number added */
+ struct xfs_da_args *args,
+ int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */
+ xfs_dir2_db_t *dbp) /* out: block number added */
{
- xfs_fileoff_t bno; /* directory offset of new block */
- int count; /* count of filesystem blocks */
- xfs_inode_t *dp; /* incore directory inode */
- int error; /* error return value */
- int got; /* blocks actually mapped */
- int i; /* temp mapping index */
- xfs_bmbt_irec_t map; /* single structure for bmap */
- int mapi; /* mapping index */
- xfs_bmbt_irec_t *mapp; /* bmap mapping structure(s) */
- xfs_mount_t *mp; /* filesystem mount point */
- int nmap; /* number of bmap entries */
- xfs_trans_t *tp; /* transaction pointer */
-
- xfs_dir2_trace_args_s("grow_inode", args, space);
- dp = args->dp;
- tp = args->trans;
- mp = dp->i_mount;
+ struct xfs_inode *dp = args->dp;
+ struct xfs_mount *mp = dp->i_mount;
+ xfs_fileoff_t bno; /* directory offset of new block */
+ int count; /* count of filesystem blocks */
+ int error;
+
+ trace_xfs_dir2_grow_inode(args, space);
+
/*
* Set lowest possible block in the space requested.
*/
bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE);
- count = mp->m_dirblkfsbs;
- /*
- * Find the first hole for our block.
- */
- if ((error = xfs_bmap_first_unused(tp, dp, count, &bno, XFS_DATA_FORK))) {
- return error;
- }
- nmap = 1;
- ASSERT(args->firstblock != NULL);
- /*
- * Try mapping the new block contiguously (one extent).
- */
- if ((error = xfs_bmapi(tp, dp, bno, count,
- XFS_BMAPI_WRITE|XFS_BMAPI_METADATA|XFS_BMAPI_CONTIG,
- args->firstblock, args->total, &map, &nmap,
- args->flist))) {
+ count = args->geo->fsbcount;
+
+ error = xfs_da_grow_inode_int(args, &bno, count);
+ if (error)
return error;
- }
- ASSERT(nmap <= 1);
- /*
- * Got it in 1.
- */
- if (nmap == 1) {
- mapp = ↦
- mapi = 1;
- }
- /*
- * Didn't work and this is a multiple-fsb directory block.
- * Try again with contiguous flag turned on.
- */
- else if (nmap == 0 && count > 1) {
- xfs_fileoff_t b; /* current file offset */
- /*
- * Space for maximum number of mappings.
- */
- mapp = kmem_alloc(sizeof(*mapp) * count, KM_SLEEP);
- /*
- * Iterate until we get to the end of our block.
- */
- for (b = bno, mapi = 0; b < bno + count; ) {
- int c; /* current fsb count */
-
- /*
- * Can't map more than MAX_NMAP at once.
- */
- nmap = MIN(XFS_BMAP_MAX_NMAP, count);
- c = (int)(bno + count - b);
- if ((error = xfs_bmapi(tp, dp, b, c,
- XFS_BMAPI_WRITE|XFS_BMAPI_METADATA,
- args->firstblock, args->total,
- &mapp[mapi], &nmap, args->flist))) {
- kmem_free(mapp, sizeof(*mapp) * count);
- return error;
- }
- if (nmap < 1)
- break;
- /*
- * Add this bunch into our table, go to the next offset.
- */
- mapi += nmap;
- b = mapp[mapi - 1].br_startoff +
- mapp[mapi - 1].br_blockcount;
- }
- }
- /*
- * Didn't work.
- */
- else {
- mapi = 0;
- mapp = NULL;
- }
- /*
- * See how many fsb's we got.
- */
- for (i = 0, got = 0; i < mapi; i++)
- got += mapp[i].br_blockcount;
- /*
- * Didn't get enough fsb's, or the first/last block's are wrong.
- */
- if (got != count || mapp[0].br_startoff != bno ||
- mapp[mapi - 1].br_startoff + mapp[mapi - 1].br_blockcount !=
- bno + count) {
- if (mapp != &map)
- kmem_free(mapp, sizeof(*mapp) * count);
- return XFS_ERROR(ENOSPC);
- }
- /*
- * Done with the temporary mapping table.
- */
- if (mapp != &map)
- kmem_free(mapp, sizeof(*mapp) * count);
- *dbp = XFS_DIR2_DA_TO_DB(mp, (xfs_dablk_t)bno);
+ *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno);
+
/*
* Update file's size if this is the data space and it grew.
*/
xfs_fsize_t size; /* directory file (data) size */
size = XFS_FSB_TO_B(mp, bno + count);
- if (size > dp->i_d.di_size) {
- dp->i_d.di_size = size;
- xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
+ if (size > dp->i_disk_size) {
+ dp->i_disk_size = size;
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
}
}
return 0;
/*
* See if the directory is a single-block form directory.
*/
-int /* error */
+int
xfs_dir2_isblock(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- int *vp) /* out: 1 is block, 0 is not block */
+ struct xfs_da_args *args,
+ bool *isblock)
{
- xfs_fileoff_t last; /* last file offset */
- xfs_mount_t *mp; /* filesystem mount point */
- int rval; /* return value */
+ struct xfs_mount *mp = args->dp->i_mount;
+ xfs_fileoff_t eof;
+ int error;
- mp = dp->i_mount;
- if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) {
- return rval;
- }
- rval = XFS_FSB_TO_B(mp, last) == mp->m_dirblksize;
- ASSERT(rval == 0 || dp->i_d.di_size == mp->m_dirblksize);
- *vp = rval;
+ error = xfs_bmap_last_offset(args->dp, &eof, XFS_DATA_FORK);
+ if (error)
+ return error;
+
+ *isblock = false;
+ if (XFS_FSB_TO_B(mp, eof) != args->geo->blksize)
+ return 0;
+
+ *isblock = true;
+ if (XFS_IS_CORRUPT(mp, args->dp->i_disk_size != args->geo->blksize))
+ return -EFSCORRUPTED;
return 0;
}
/*
* See if the directory is a single-leaf form directory.
*/
-int /* error */
+int
xfs_dir2_isleaf(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_inode_t *dp, /* incore directory inode */
- int *vp) /* out: 1 is leaf, 0 is not leaf */
+ struct xfs_da_args *args,
+ bool *isleaf)
{
- xfs_fileoff_t last; /* last file offset */
- xfs_mount_t *mp; /* filesystem mount point */
- int rval; /* return value */
+ xfs_fileoff_t eof;
+ int error;
- mp = dp->i_mount;
- if ((rval = xfs_bmap_last_offset(tp, dp, &last, XFS_DATA_FORK))) {
- return rval;
- }
- *vp = last == mp->m_dirleafblk + (1 << mp->m_sb.sb_dirblklog);
+ error = xfs_bmap_last_offset(args->dp, &eof, XFS_DATA_FORK);
+ if (error)
+ return error;
+
+ *isleaf = false;
+ if (eof != args->geo->leafblk + args->geo->fsbcount)
+ return 0;
+
+ *isleaf = true;
return 0;
}
*/
int
xfs_dir2_shrink_inode(
- xfs_da_args_t *args, /* operation arguments */
- xfs_dir2_db_t db, /* directory block number */
- xfs_dabuf_t *bp) /* block's buffer */
+ struct xfs_da_args *args,
+ xfs_dir2_db_t db,
+ struct xfs_buf *bp)
{
- xfs_fileoff_t bno; /* directory file offset */
- xfs_dablk_t da; /* directory file offset */
- int done; /* bunmap is finished */
- xfs_inode_t *dp; /* incore directory inode */
- int error; /* error return value */
- xfs_mount_t *mp; /* filesystem mount point */
- xfs_trans_t *tp; /* transaction pointer */
-
- xfs_dir2_trace_args_db("shrink_inode", args, db, bp);
+ xfs_fileoff_t bno; /* directory file offset */
+ xfs_dablk_t da; /* directory file offset */
+ int done; /* bunmap is finished */
+ struct xfs_inode *dp;
+ int error;
+ struct xfs_mount *mp;
+ struct xfs_trans *tp;
+
+ trace_xfs_dir2_shrink_inode(args, db);
+
dp = args->dp;
mp = dp->i_mount;
tp = args->trans;
- da = XFS_DIR2_DB_TO_DA(mp, db);
- /*
- * Unmap the fsblock(s).
- */
- if ((error = xfs_bunmapi(tp, dp, da, mp->m_dirblkfsbs,
- XFS_BMAPI_METADATA, 0, args->firstblock, args->flist,
- &done))) {
+ da = xfs_dir2_db_to_da(args->geo, db);
+
+ /* Unmap the fsblock(s). */
+ error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, &done);
+ if (error) {
/*
- * ENOSPC actually can happen if we're in a removename with
- * no space reservation, and the resulting block removal
- * would cause a bmap btree split or conversion from extents
- * to btree. This can only happen for un-fragmented
- * directory blocks, since you need to be punching out
- * the middle of an extent.
- * In this case we need to leave the block in the file,
- * and not binval it.
- * So the block has to be in a consistent empty state
- * and appropriately logged.
- * We don't free up the buffer, the caller can tell it
- * hasn't happened since it got an error back.
+ * ENOSPC actually can happen if we're in a removename with no
+ * space reservation, and the resulting block removal would
+ * cause a bmap btree split or conversion from extents to btree.
+ * This can only happen for un-fragmented directory blocks,
+ * since you need to be punching out the middle of an extent.
+ * In this case we need to leave the block in the file, and not
+ * binval it. So the block has to be in a consistent empty
+ * state and appropriately logged. We don't free up the buffer,
+ * the caller can tell it hasn't happened since it got an error
+ * back.
*/
return error;
}
/*
* Invalidate the buffer from the transaction.
*/
- xfs_da_binval(tp, bp);
+ xfs_trans_binval(tp, bp);
/*
* If it's not a data block, we're done.
*/
- if (db >= XFS_DIR2_LEAF_FIRSTDB(mp))
+ if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET))
return 0;
/*
* If the block isn't the last one in the directory, we're done.
*/
- if (dp->i_d.di_size > XFS_DIR2_DB_OFF_TO_BYTE(mp, db + 1, 0))
+ if (dp->i_disk_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0))
return 0;
bno = da;
if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) {
*/
return error;
}
- if (db == mp->m_dirdatablk)
+ if (db == args->geo->datablk)
ASSERT(bno == 0);
else
ASSERT(bno > 0);
/*
* Set the size to the new last block.
*/
- dp->i_d.di_size = XFS_FSB_TO_B(mp, bno);
+ dp->i_disk_size = XFS_FSB_TO_B(mp, bno);
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
return 0;
}
+
+/* Returns true if the directory entry name is valid. */
+bool
+xfs_dir2_namecheck(
+ const void *name,
+ size_t length)
+{
+ /*
+ * MAXNAMELEN includes the trailing null, but (name/length) leave it
+ * out, so use >= for the length check.
+ */
+ if (length >= MAXNAMELEN)
+ return false;
+
+ /* There shouldn't be any slashes or nulls here */
+ return !memchr(name, '/', length) && !memchr(name, 0, length);
+}
+
+xfs_dahash_t
+xfs_dir2_hashname(
+ struct xfs_mount *mp,
+ const struct xfs_name *name)
+{
+ if (unlikely(xfs_has_asciici(mp)))
+ return xfs_ascii_ci_hashname(name);
+ return xfs_da_hashname(name->name, name->len);
+}
+
+enum xfs_dacmp
+xfs_dir2_compname(
+ struct xfs_da_args *args,
+ const unsigned char *name,
+ int len)
+{
+ if (unlikely(xfs_has_asciici(args->dp->i_mount)))
+ return xfs_ascii_ci_compname(args, name, len);
+ return xfs_da_compname(args, name, len);
+}
projects / thirdparty / xfsprogs-dev.git / blobdiff