![Arnd Bergmann](/assets/img/avatar_default.png)
commitfd29f7af75
upstream. A harmless warning just got introduced: fs/xfs/libxfs/xfs_dir2.h:40:8: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers] Removing the 'const' modifier avoids the warning and has no other effect. Fixes:1fc4d33fed
("xfs: replace xfs_mode_to_ftype table with switch statement") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
742 lines
18 KiB
C
742 lines
18 KiB
C
/*
|
|
* 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_format.h"
|
|
#include "xfs_log_format.h"
|
|
#include "xfs_trans_resv.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_defer.h"
|
|
#include "xfs_da_format.h"
|
|
#include "xfs_da_btree.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_trans.h"
|
|
#include "xfs_inode_item.h"
|
|
#include "xfs_bmap.h"
|
|
#include "xfs_dir2.h"
|
|
#include "xfs_dir2_priv.h"
|
|
#include "xfs_error.h"
|
|
#include "xfs_trace.h"
|
|
|
|
struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR };
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
STATIC xfs_dahash_t
|
|
xfs_ascii_ci_hashname(
|
|
struct xfs_name *name)
|
|
{
|
|
xfs_dahash_t hash;
|
|
int i;
|
|
|
|
for (i = 0, hash = 0; i < name->len; i++)
|
|
hash = tolower(name->name[i]) ^ rol32(hash, 7);
|
|
|
|
return hash;
|
|
}
|
|
|
|
STATIC 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 (tolower(args->name[i]) != tolower(name[i]))
|
|
return XFS_CMP_DIFFERENT;
|
|
result = XFS_CMP_CASE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static struct xfs_nameops xfs_ascii_ci_nameops = {
|
|
.hashname = xfs_ascii_ci_hashname,
|
|
.compname = xfs_ascii_ci_compname,
|
|
};
|
|
|
|
int
|
|
xfs_da_mount(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_da_geometry *dageo;
|
|
int nodehdr_size;
|
|
|
|
|
|
ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
|
|
ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <=
|
|
XFS_MAX_BLOCKSIZE);
|
|
|
|
mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL);
|
|
mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL);
|
|
|
|
nodehdr_size = mp->m_dir_inode_ops->node_hdr_size;
|
|
mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry),
|
|
KM_SLEEP | KM_MAYFAIL);
|
|
mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry),
|
|
KM_SLEEP | 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 = 1 << dageo->blklog;
|
|
dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog;
|
|
|
|
/*
|
|
* 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 - nodehdr_size) /
|
|
(uint)sizeof(xfs_da_node_entry_t);
|
|
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_ents = (dageo->blksize - nodehdr_size) /
|
|
(uint)sizeof(xfs_da_node_entry_t);
|
|
dageo->magicpct = (dageo->blksize * 37) / 100;
|
|
|
|
if (xfs_sb_version_hasasciici(&mp->m_sb))
|
|
mp->m_dirnameops = &xfs_ascii_ci_nameops;
|
|
else
|
|
mp->m_dirnameops = &xfs_default_nameops;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
xfs_da_unmount(
|
|
struct xfs_mount *mp)
|
|
{
|
|
kmem_free(mp->m_dir_geo);
|
|
kmem_free(mp->m_attr_geo);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if directory contains only "." and "..".
|
|
*/
|
|
int
|
|
xfs_dir_isempty(
|
|
xfs_inode_t *dp)
|
|
{
|
|
xfs_dir2_sf_hdr_t *sfp;
|
|
|
|
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
|
|
if (dp->i_d.di_size == 0) /* might happen during shutdown. */
|
|
return 1;
|
|
if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp))
|
|
return 0;
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
return !sfp->count;
|
|
}
|
|
|
|
/*
|
|
* Validate a given inode number.
|
|
*/
|
|
int
|
|
xfs_dir_ino_validate(
|
|
xfs_mount_t *mp,
|
|
xfs_ino_t ino)
|
|
{
|
|
xfs_agblock_t agblkno;
|
|
xfs_agino_t agino;
|
|
xfs_agnumber_t agno;
|
|
int ino_ok;
|
|
int ioff;
|
|
|
|
agno = XFS_INO_TO_AGNO(mp, ino);
|
|
agblkno = XFS_INO_TO_AGBNO(mp, ino);
|
|
ioff = XFS_INO_TO_OFFSET(mp, ino);
|
|
agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff);
|
|
ino_ok =
|
|
agno < mp->m_sb.sb_agcount &&
|
|
agblkno < mp->m_sb.sb_agblocks &&
|
|
agblkno != 0 &&
|
|
ioff < (1 << mp->m_sb.sb_inopblog) &&
|
|
XFS_AGINO_TO_INO(mp, agno, agino) == ino;
|
|
if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE,
|
|
XFS_RANDOM_DIR_INO_VALIDATE))) {
|
|
xfs_warn(mp, "Invalid inode number 0x%Lx",
|
|
(unsigned long long) ino);
|
|
XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialize a directory with its "." and ".." entries.
|
|
*/
|
|
int
|
|
xfs_dir_init(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *dp,
|
|
xfs_inode_t *pdp)
|
|
{
|
|
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;
|
|
|
|
args = kmem_zalloc(sizeof(*args), KM_SLEEP | 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, or check for available space.
|
|
* If inum is 0, only the available space test is performed.
|
|
*/
|
|
int
|
|
xfs_dir_createname(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *dp,
|
|
struct xfs_name *name,
|
|
xfs_ino_t inum, /* new entry inode number */
|
|
xfs_fsblock_t *first, /* bmap's firstblock */
|
|
struct xfs_defer_ops *dfops, /* bmap's freeblock list */
|
|
xfs_extlen_t total) /* bmap's total block count */
|
|
{
|
|
struct xfs_da_args *args;
|
|
int rval;
|
|
int v; /* type-checking value */
|
|
|
|
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);
|
|
}
|
|
|
|
args = kmem_zalloc(sizeof(*args), KM_SLEEP | 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 = dp->i_mount->m_dirnameops->hashname(name);
|
|
args->inumber = inum;
|
|
args->dp = dp;
|
|
args->firstblock = first;
|
|
args->dfops = dfops;
|
|
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_d.di_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);
|
|
|
|
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.
|
|
*/
|
|
|
|
int
|
|
xfs_dir_lookup(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *dp,
|
|
struct xfs_name *name,
|
|
xfs_ino_t *inum, /* out: inode number */
|
|
struct xfs_name *ci_name) /* out: actual name if CI match */
|
|
{
|
|
struct xfs_da_args *args;
|
|
int rval;
|
|
int v; /* type-checking value */
|
|
int lock_mode;
|
|
|
|
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
|
|
XFS_STATS_INC(dp->i_mount, xs_dir_lookup);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
|
|
args->geo = dp->i_mount->m_dir_geo;
|
|
args->name = name->name;
|
|
args->namelen = name->len;
|
|
args->filetype = name->type;
|
|
args->hashval = dp->i_mount->m_dirnameops->hashname(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_d.di_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);
|
|
|
|
out_check_rval:
|
|
if (rval == -EEXIST)
|
|
rval = 0;
|
|
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.
|
|
*/
|
|
int
|
|
xfs_dir_removename(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *dp,
|
|
struct xfs_name *name,
|
|
xfs_ino_t ino,
|
|
xfs_fsblock_t *first, /* bmap's firstblock */
|
|
struct xfs_defer_ops *dfops, /* bmap's freeblock list */
|
|
xfs_extlen_t total) /* bmap's total block count */
|
|
{
|
|
struct xfs_da_args *args;
|
|
int rval;
|
|
int v; /* type-checking value */
|
|
|
|
ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
|
|
XFS_STATS_INC(dp->i_mount, xs_dir_remove);
|
|
|
|
args = kmem_zalloc(sizeof(*args), KM_SLEEP | 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 = dp->i_mount->m_dirnameops->hashname(name);
|
|
args->inumber = ino;
|
|
args->dp = dp;
|
|
args->firstblock = first;
|
|
args->dfops = dfops;
|
|
args->total = total;
|
|
args->whichfork = XFS_DATA_FORK;
|
|
args->trans = tp;
|
|
|
|
if (dp->i_d.di_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);
|
|
out_free:
|
|
kmem_free(args);
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
* Replace the inode number of a directory entry.
|
|
*/
|
|
int
|
|
xfs_dir_replace(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *dp,
|
|
struct xfs_name *name, /* name of entry to replace */
|
|
xfs_ino_t inum, /* new inode number */
|
|
xfs_fsblock_t *first, /* bmap's firstblock */
|
|
struct xfs_defer_ops *dfops, /* bmap's freeblock list */
|
|
xfs_extlen_t total) /* bmap's total block count */
|
|
{
|
|
struct xfs_da_args *args;
|
|
int rval;
|
|
int v; /* type-checking value */
|
|
|
|
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_SLEEP | 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 = dp->i_mount->m_dirnameops->hashname(name);
|
|
args->inumber = inum;
|
|
args->dp = dp;
|
|
args->firstblock = first;
|
|
args->dfops = dfops;
|
|
args->total = total;
|
|
args->whichfork = XFS_DATA_FORK;
|
|
args->trans = tp;
|
|
|
|
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
|
|
rval = xfs_dir2_sf_replace(args);
|
|
goto out_free;
|
|
}
|
|
|
|
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);
|
|
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, NULL, NULL, 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.
|
|
*/
|
|
int
|
|
xfs_dir2_grow_inode(
|
|
struct xfs_da_args *args,
|
|
int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */
|
|
xfs_dir2_db_t *dbp) /* out: block number added */
|
|
{
|
|
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 = args->geo->fsbcount;
|
|
|
|
error = xfs_da_grow_inode_int(args, &bno, count);
|
|
if (error)
|
|
return error;
|
|
|
|
*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.
|
|
*/
|
|
if (space == XFS_DIR2_DATA_SPACE) {
|
|
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(args->trans, dp, XFS_ILOG_CORE);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* See if the directory is a single-block form directory.
|
|
*/
|
|
int
|
|
xfs_dir2_isblock(
|
|
struct xfs_da_args *args,
|
|
int *vp) /* out: 1 is block, 0 is not block */
|
|
{
|
|
xfs_fileoff_t last; /* last file offset */
|
|
int rval;
|
|
|
|
if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK)))
|
|
return rval;
|
|
rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize;
|
|
if (rval != 0 && args->dp->i_d.di_size != args->geo->blksize)
|
|
return -EFSCORRUPTED;
|
|
*vp = rval;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* See if the directory is a single-leaf form directory.
|
|
*/
|
|
int
|
|
xfs_dir2_isleaf(
|
|
struct xfs_da_args *args,
|
|
int *vp) /* out: 1 is block, 0 is not block */
|
|
{
|
|
xfs_fileoff_t last; /* last file offset */
|
|
int rval;
|
|
|
|
if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK)))
|
|
return rval;
|
|
*vp = last == args->geo->leafblk + args->geo->fsbcount;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Remove the given block from the directory.
|
|
* This routine is used for data and free blocks, leaf/node are done
|
|
* by xfs_da_shrink_inode.
|
|
*/
|
|
int
|
|
xfs_dir2_shrink_inode(
|
|
xfs_da_args_t *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;
|
|
int error;
|
|
xfs_mount_t *mp;
|
|
xfs_trans_t *tp;
|
|
|
|
trace_xfs_dir2_shrink_inode(args, db);
|
|
|
|
dp = args->dp;
|
|
mp = dp->i_mount;
|
|
tp = args->trans;
|
|
da = xfs_dir2_db_to_da(args->geo, db);
|
|
|
|
/* Unmap the fsblock(s). */
|
|
error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0,
|
|
args->firstblock, args->dfops, &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.
|
|
*/
|
|
return error;
|
|
}
|
|
ASSERT(done);
|
|
/*
|
|
* Invalidate the buffer from the transaction.
|
|
*/
|
|
xfs_trans_binval(tp, bp);
|
|
/*
|
|
* If it's not a data block, we're done.
|
|
*/
|
|
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(args->geo, db + 1, 0))
|
|
return 0;
|
|
bno = da;
|
|
if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) {
|
|
/*
|
|
* This can't really happen unless there's kernel corruption.
|
|
*/
|
|
return error;
|
|
}
|
|
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);
|
|
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
|
|
return 0;
|
|
}
|