Google Git
Sign in
kernel / pub / scm / fs / xfs / xfsprogs-dev / refs/heads/repair-speedup-20090908 / . / repair / dir.c
blob: 6e0d54b9e096eace7e54c7e36f6ac63b245e69a4 [file] [log] [blame]
/*
* Copyright (c) 2000-2002,2005 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 <libxfs.h>
#include "avl.h"
#include "globals.h"
#include "agheader.h"
#include "incore.h"
#include "protos.h"
#include "err_protos.h"
#include "dinode.h"
#include "dir.h"
#include "bmap.h"
#if XFS_DIR_LEAF_MAPSIZE >= XFS_ATTR_LEAF_MAPSIZE
#define XR_DA_LEAF_MAPSIZE XFS_DIR_LEAF_MAPSIZE
#else
#define XR_DA_LEAF_MAPSIZE XFS_ATTR_LEAF_MAPSIZE
#endif
typedef struct da_hole_map {
int lost_holes;
int num_holes;
struct {
int base;
int size;
} hentries[XR_DA_LEAF_MAPSIZE];
} da_hole_map_t;
/*
* takes a name and length (name need not be null-terminated)
* and returns 1 if the name contains a '/' or a \0, returns 0
* otherwise
*/
int
namecheck(char *name, int length)
{
char *c;
int i;
ASSERT(length < MAXNAMELEN);
for (c = name, i = 0; i < length; i++, c++) {
if (*c == '/' || *c == '\0')
return(1);
}
return(0);
}
/*
* this routine performs inode discovery and tries to fix things
* in place. available redundancy -- inode data size should match
* used directory space in inode. returns number of valid directory
* entries. a non-zero return value means the directory is bogus
* and should be blasted.
*/
/* ARGSUSED */
int
process_shortform_dir(
xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dip,
int ino_discovery,
int *dino_dirty, /* out - 1 if dinode buffer dirty? */
xfs_ino_t *parent, /* out - NULLFSINO if entry doesn't exist */
char *dirname, /* directory pathname */
int *repair) /* out - 1 if dir was fixed up */
{
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sf_entry, *next_sfe, *tmp_sfe;
xfs_ino_t lino;
int max_size;
__int64_t ino_dir_size;
int num_entries;
int ino_off;
int namelen;
int i;
int junkit;
int tmp_len;
int tmp_elen;
int bad_sfnamelen;
ino_tree_node_t *irec_p;
char name[MAXNAMELEN + 1];
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_shortform_dir - inode %llu\n", ino);
#endif
sf = (xfs_dir_shortform_t *)XFS_DFORK_DPTR(dip);
max_size = XFS_DFORK_DSIZE(dip, mp);
num_entries = sf->hdr.count;
ino_dir_size = be64_to_cpu(dip->di_core.di_size);
*repair = 0;
ASSERT(ino_dir_size <= max_size);
/*
* check for bad entry count
*/
if (num_entries * sizeof(xfs_dir_sf_entry_t) + sizeof(xfs_dir_sf_hdr_t)
> max_size || num_entries == 0)
num_entries = 0xFF;
/*
* run through entries, stop at first bad entry, don't need
* to check for .. since that's encoded in its own field
*/
sf_entry = next_sfe = &sf->list[0];
for (i = 0; i < num_entries && ino_dir_size >
(__psint_t)next_sfe - (__psint_t)sf; i++) {
tmp_sfe = NULL;
sf_entry = next_sfe;
junkit = 0;
bad_sfnamelen = 0;
xfs_dir_sf_get_dirino(&sf_entry->inumber, &lino);
/*
* if entry points to self, junk it since only '.' or '..'
* should do that and shortform dirs don't contain either
* entry. if inode number is invalid, trash entry.
* if entry points to special inodes, trash it.
* if inode is unknown but number is valid,
* add it to the list of uncertain inodes. don't
* have to worry about an entry pointing to a
* deleted lost+found inode because the entry was
* deleted at the same time that the inode was cleared.
*/
if (lino == ino) {
junkit = 1;
} else if (verify_inum(mp, lino)) {
/*
* junk the entry, mark lino as NULL since it's bad
*/
do_warn(
_("invalid inode number %llu in directory %llu\n"), lino, ino);
lino = NULLFSINO;
junkit = 1;
} else if (lino == mp->m_sb.sb_rbmino) {
do_warn(
_("entry in shortform dir %llu references rt bitmap inode %llu\n"),
ino, lino);
junkit = 1;
} else if (lino == mp->m_sb.sb_rsumino) {
do_warn(
_("entry in shortform dir %llu references rt summary inode %llu\n"),
ino, lino);
junkit = 1;
} else if (lino == mp->m_sb.sb_uquotino) {
do_warn(
_("entry in shortform dir %llu references user quota inode %llu\n"),
ino, lino);
junkit = 1;
} else if (lino == mp->m_sb.sb_gquotino) {
do_warn(
_("entry in shortform dir %llu references group quota inode %llu\n"),
ino, lino);
junkit = 1;
} else if ((irec_p = find_inode_rec(XFS_INO_TO_AGNO(mp, lino),
XFS_INO_TO_AGINO(mp, lino))) != NULL) {
/*
* if inode is marked free and we're in inode
* discovery mode, leave the entry alone for now.
* if the inode turns out to be used, we'll figure
* that out when we scan it. If the inode really
* is free, we'll hit this code again in phase 4
* after we've finished inode discovery and blow
* out the entry then.
*/
ino_off = XFS_INO_TO_AGINO(mp, lino) -
irec_p->ino_startnum;
ASSERT(is_inode_confirmed(irec_p, ino_off));
if (!ino_discovery && is_inode_free(irec_p, ino_off)) {
do_warn(
_("entry references free inode %llu in shortform directory %llu\n"),
lino, ino);
junkit = 1;
}
} else if (ino_discovery) {
/*
* put the inode on the uncertain list. we'll
* pull the inode off the list and check it later.
* if the inode turns out be bogus, we'll delete
* this entry in phase 6.
*/
add_inode_uncertain(mp, lino, 0);
} else {
/*
* blow the entry out. we know about all
* undiscovered entries now (past inode discovery
* phase) so this is clearly a bogus entry.
*/
do_warn(
_("entry references non-existent inode %llu in shortform dir %llu\n"),
lino, ino);
junkit = 1;
}
namelen = sf_entry->namelen;
if (namelen == 0) {
/*
* if we're really lucky, this is
* the last entry in which case we
* can use the dir size to set the
* namelen value. otherwise, forget
* it because we're not going to be
* able to find the next entry.
*/
bad_sfnamelen = 1;
if (i == num_entries - 1) {
namelen = ino_dir_size -
((__psint_t) &sf_entry->name[0] -
(__psint_t) sf);
if (!no_modify) {
do_warn(
_("zero length entry in shortform dir %llu, resetting to %d\n"),
ino, namelen);
sf_entry->namelen = namelen;
} else {
do_warn(
_("zero length entry in shortform dir %llu, would set to %d\n"),
ino, namelen);
}
} else {
do_warn(
_("zero length entry in shortform dir %llu, "),
ino);
if (!no_modify)
do_warn(_("junking %d entries\n"),
num_entries - i);
else
do_warn(_("would junk %d entries\n"),
num_entries - i);
/*
* don't process the rest of the directory,
* break out of processing looop
*/
break;
}
} else if ((__psint_t) sf_entry - (__psint_t) sf +
+ xfs_dir_sf_entsize_byentry(sf_entry)
> ino_dir_size) {
bad_sfnamelen = 1;
if (i == num_entries - 1) {
namelen = ino_dir_size -
((__psint_t) &sf_entry->name[0] -
(__psint_t) sf);
do_warn(
_("size of last entry overflows space left in in shortform dir %llu, "),
ino);
if (!no_modify) {
do_warn(_("resetting to %d\n"),
namelen);
sf_entry->namelen = namelen;
*dino_dirty = 1;
} else {
do_warn(_("would reset to %d\n"),
namelen);
}
} else {
do_warn(
_("size of entry #%d overflows space left in in shortform dir %llu\n"),
i, ino);
if (!no_modify) {
if (i == num_entries - 1)
do_warn(
_("junking entry #%d\n"),
i);
else
do_warn(
_("junking %d entries\n"),
num_entries - i);
} else {
if (i == num_entries - 1)
do_warn(
_("would junk entry #%d\n"),
i);
else
do_warn(
_("would junk %d entries\n"),
num_entries - i);
}
break;
}
}
/*
* check for illegal chars in name.
* no need to check for bad length because
* the length value is stored in a byte
* so it can't be too big, it can only wrap
*/
if (namecheck((char *)&sf_entry->name[0], namelen)) {
/*
* junk entry
*/
do_warn(
_("entry contains illegal character in shortform dir %llu\n"),
ino);
junkit = 1;
}
/*
* junk the entry by copying up the rest of the
* fork over the current entry and decrementing
* the entry count. if we're in no_modify mode,
* just issue the warning instead. then continue
* the loop with the next_sfe pointer set to the
* correct place in the fork and other counters
* properly set to reflect the deletion if it
* happened.
*/
if (junkit) {
memmove(name, sf_entry->name, namelen);
name[namelen] = '\0';
if (!no_modify) {
tmp_elen = xfs_dir_sf_entsize_byentry(sf_entry);
be64_add_cpu(&dip->di_core.di_size, -tmp_elen);
ino_dir_size -= tmp_elen;
tmp_sfe = (xfs_dir_sf_entry_t *)
((__psint_t) sf_entry + tmp_elen);
tmp_len = max_size - ((__psint_t) tmp_sfe
- (__psint_t) sf);
memmove(sf_entry, tmp_sfe, tmp_len);
sf->hdr.count -= 1;
num_entries--;
memset((void *)((__psint_t)sf_entry + tmp_len),
0, tmp_elen);
/*
* reset the tmp value to the current
* pointer so we'll process the entry
* we just moved up
*/
tmp_sfe = sf_entry;
/*
* WARNING: drop the index i by one
* so it matches the decremented count
* for accurate comparisons later
*/
i--;
*dino_dirty = 1;
*repair = 1;
do_warn(
_("junking entry \"%s\" in directory inode %llu\n"),
name, ino);
} else {
do_warn(
_("would have junked entry \"%s\" in directory inode %llu\n"),
name, ino);
}
}
/*
* go onto next entry unless we've just junked an
* entry in which the current entry pointer points
* to an unprocessed entry. have to take into zero-len
* entries into account in no modify mode since we
* calculate size based on next_sfe.
*/
next_sfe = (tmp_sfe == NULL)
? (xfs_dir_sf_entry_t *) ((__psint_t) sf_entry
+ ((!bad_sfnamelen)
? xfs_dir_sf_entsize_byentry(sf_entry)
: sizeof(xfs_dir_sf_entry_t) - 1
+ namelen))
: tmp_sfe;
}
/* sync up sizes and entry counts */
if (sf->hdr.count != i) {
if (no_modify) {
do_warn(
_("would have corrected entry count in directory %llu from %d to %d\n"),
ino, sf->hdr.count, i);
} else {
do_warn(
_("corrected entry count in directory %llu, was %d, now %d\n"),
ino, sf->hdr.count, i);
sf->hdr.count = i;
*dino_dirty = 1;
*repair = 1;
}
}
if ((__psint_t) next_sfe - (__psint_t) sf != ino_dir_size) {
if (no_modify) {
do_warn(
_("would have corrected directory %llu size from %lld to %lld\n"),
ino, (__int64_t) ino_dir_size,
(__int64_t)((__psint_t) next_sfe - (__psint_t) sf));
} else {
do_warn(
_("corrected directory %llu size, was %lld, now %lld\n"),
ino, (__int64_t) ino_dir_size,
(__int64_t)((__psint_t) next_sfe - (__psint_t) sf));
dip->di_core.di_size = cpu_to_be64((__psint_t)next_sfe
- (__psint_t)sf);
*dino_dirty = 1;
*repair = 1;
}
}
/*
* check parent (..) entry
*/
xfs_dir_sf_get_dirino(&sf->hdr.parent, parent);
/*
* if parent entry is bogus, null it out. we'll fix it later .
*/
if (verify_inum(mp, *parent)) {
*parent = NULLFSINO;
do_warn(
_("bogus .. inode number (%llu) in directory inode %llu, "),
*parent, ino);
if (!no_modify) {
do_warn(_("clearing inode number\n"));
xfs_dir_sf_put_dirino(parent, &sf->hdr.parent);
*dino_dirty = 1;
*repair = 1;
} else {
do_warn(_("would clear inode number\n"));
}
} else if (ino == mp->m_sb.sb_rootino && ino != *parent) {
/*
* root directories must have .. == .
*/
if (!no_modify) {
do_warn(
_("corrected root directory %llu .. entry, was %llu, now %llu\n"),
ino, *parent, ino);
*parent = ino;
xfs_dir_sf_put_dirino(parent, &sf->hdr.parent);
*dino_dirty = 1;
*repair = 1;
} else {
do_warn(
_("would have corrected root directory %llu .. entry from %llu to %llu\n"),
ino, *parent, ino);
}
} else if (ino == *parent && ino != mp->m_sb.sb_rootino) {
/*
* likewise, non-root directories can't have .. pointing
* to .
*/
*parent = NULLFSINO;
do_warn(_("bad .. entry in dir ino %llu, points to self, "),
ino);
if (!no_modify) {
do_warn(_("clearing inode number\n"));
xfs_dir_sf_put_dirino(parent, &sf->hdr.parent);
*dino_dirty = 1;
*repair = 1;
} else {
do_warn(_("would clear inode number\n"));
}
}
return(0);
}
/*
* freespace map for directory leaf blocks (1 bit per byte)
* 1 == used, 0 == free
*/
size_t ts_dir_freemap_size = sizeof(da_freemap_t) * DA_BMAP_SIZE;
void
init_da_freemap(da_freemap_t *dir_freemap)
{
memset(dir_freemap, 0, sizeof(da_freemap_t) * DA_BMAP_SIZE);
}
/*
* sets directory freemap, returns 1 if there is a conflict
* returns 0 if everything's good. the range [start, stop) is set.
* right now, we just use the static array since only one directory
* block will be processed at once even though the interface allows
* you to pass in arbitrary da_freemap_t array's.
*
* Within a char, the lowest bit of the char represents the byte with
* the smallest address
*/
int
set_da_freemap(xfs_mount_t *mp, da_freemap_t *map, int start, int stop)
{
const da_freemap_t mask = 0x1;
int i;
if (start > stop) {
/*
* allow == relation since [x, x) claims 1 byte
*/
do_warn(_("bad range claimed [%d, %d) in da block\n"),
start, stop);
return(1);
}
if (stop > mp->m_sb.sb_blocksize) {
do_warn(
_("byte range end [%d %d) in da block larger than blocksize %d\n"),
start, stop, mp->m_sb.sb_blocksize);
return(1);
}
for (i = start; i < stop; i ++) {
if (map[i / NBBY] & (mask << i % NBBY)) {
do_warn(_("multiply claimed byte %d in da block\n"), i);
return(1);
}
map[i / NBBY] |= (mask << i % NBBY);
}
return(0);
}
/*
* returns 0 if holemap is consistent with reality (as expressed by
* the da_freemap_t). returns 1 if there's a conflict.
*/
int
verify_da_freemap(xfs_mount_t *mp, da_freemap_t *map, da_hole_map_t *holes,
xfs_ino_t ino, xfs_dablk_t da_bno)
{
int i, j, start, len;
const da_freemap_t mask = 0x1;
for (i = 0; i < XFS_DIR_LEAF_MAPSIZE; i++) {
if (holes->hentries[i].size == 0)
continue;
start = holes->hentries[i].base;
len = holes->hentries[i].size;
if (start >= mp->m_sb.sb_blocksize ||
start + len > mp->m_sb.sb_blocksize) {
do_warn(
_("hole (start %d, len %d) out of range, block %d, dir ino %llu\n"),
start, len, da_bno, ino);
return(1);
}
for (j = start; j < start + len; j++) {
if ((map[j / NBBY] & (mask << (j % NBBY))) != 0) {
/*
* bad news -- hole claims a used byte is free
*/
do_warn(
_("hole claims used byte %d, block %d, dir ino %llu\n"),
j, da_bno, ino);
return(1);
}
}
}
return(0);
}
void
process_da_freemap(xfs_mount_t *mp, da_freemap_t *map, da_hole_map_t *holes)
{
int i, j, in_hole, start, length, smallest, num_holes;
const da_freemap_t mask = 0x1;
num_holes = in_hole = start = length = 0;
for (i = 0; i < mp->m_sb.sb_blocksize; i++) {
if ((map[i / NBBY] & (mask << (i % NBBY))) == 0) {
/*
* byte is free (unused)
*/
if (in_hole == 1)
continue;
/*
* start of a new hole
*/
in_hole = 1;
start = i;
} else {
/*
* byte is used
*/
if (in_hole == 0)
continue;
/*
* end of a hole
*/
in_hole = 0;
/*
* if the hole disappears, throw it away
*/
length = i - start;
if (length <= 0)
continue;
num_holes++;
for (smallest = j = 0; j < XR_DA_LEAF_MAPSIZE; j++) {
if (holes->hentries[j].size <
holes->hentries[smallest].size)
smallest = j;
}
if (length > holes->hentries[smallest].size) {
holes->hentries[smallest].base = start;
holes->hentries[smallest].size = length;
}
}
}
/*
* see if we have a big hole at the end
*/
if (in_hole == 1) {
/*
* duplicate of hole placement code above
*/
length = i - start;
if (length > 0) {
num_holes++;
for (smallest = j = 0; j < XR_DA_LEAF_MAPSIZE; j++) {
if (holes->hentries[j].size <
holes->hentries[smallest].size)
smallest = j;
}
if (length > holes->hentries[smallest].size) {
holes->hentries[smallest].base = start;
holes->hentries[smallest].size = length;
}
}
}
holes->lost_holes = MAX(num_holes - XR_DA_LEAF_MAPSIZE, 0);
holes->num_holes = num_holes;
return;
}
/*
* returns 1 if the hole info doesn't match, 0 if it does
*/
/* ARGSUSED */
int
compare_da_freemaps(xfs_mount_t *mp, da_hole_map_t *holemap,
da_hole_map_t *block_hmap, int entries,
xfs_ino_t ino, xfs_dablk_t da_bno)
{
int i, k, res, found;
res = 0;
/*
* we chop holemap->lost_holes down to being two-valued
* value (1 or 0) for the test because the filesystem
* value is two-valued
*/
if ((holemap->lost_holes > 0 ? 1 : 0) != block_hmap->lost_holes) {
if (verbose) {
do_warn(
_("- derived hole value %d, saw %d, block %d, dir ino %llu\n"),
holemap->lost_holes, block_hmap->lost_holes,
da_bno, ino);
res = 1;
} else
return(1);
}
for (i = 0; i < entries; i++) {
for (found = k = 0; k < entries; k++) {
if (holemap->hentries[i].base ==
block_hmap->hentries[k].base
&& holemap->hentries[i].size ==
block_hmap->hentries[k].size)
found = 1;
}
if (!found) {
if (verbose) {
do_warn(
_("- derived hole (base %d, size %d) in block %d, dir inode %llu not found\n"),
holemap->hentries[i].base,
holemap->hentries[i].size,
da_bno, ino);
res = 1;
} else
return(1);
}
}
return(res);
}
#if 0
void
test(xfs_mount_t *mp)
{
int i = 0;
da_hole_map_t holemap;
init_da_freemap(dir_freemap);
memset(&holemap, 0, sizeof(da_hole_map_t));
set_da_freemap(mp, dir_freemap, 0, 50);
set_da_freemap(mp, dir_freemap, 100, 126);
set_da_freemap(mp, dir_freemap, 126, 129);
set_da_freemap(mp, dir_freemap, 130, 131);
set_da_freemap(mp, dir_freemap, 150, 160);
process_da_freemap(mp, dir_freemap, &holemap);
return;
}
#endif
/*
* walk tree from root to the left-most leaf block reading in
* blocks and setting up cursor. passes back file block number of the
* left-most leaf block if successful (bno). returns 1 if successful,
* 0 if unsuccessful.
*/
int
traverse_int_dablock(xfs_mount_t *mp,
da_bt_cursor_t *da_cursor,
xfs_dablk_t *rbno,
int whichfork)
{
xfs_dablk_t bno;
int i;
xfs_da_intnode_t *node;
xfs_dfsbno_t fsbno;
xfs_buf_t *bp;
/*
* traverse down left-side of tree until we hit the
* left-most leaf block setting up the btree cursor along
* the way.
*/
bno = 0;
i = -1;
node = NULL;
da_cursor->active = 0;
do {
/*
* read in each block along the way and set up cursor
*/
fsbno = blkmap_get(da_cursor->blkmap, bno);
if (fsbno == NULLDFSBNO)
goto error_out;
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, fsbno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
if (whichfork == XFS_DATA_FORK)
do_warn(_("can't read block %u (fsbno %llu) "
"for directory inode %llu\n"),
bno, fsbno, da_cursor->ino);
else
do_warn(_("can't read block %u (fsbno %llu) "
"for attrbute fork of inode %llu\n"),
bno, fsbno, da_cursor->ino);
goto error_out;
}
node = (xfs_da_intnode_t *)XFS_BUF_PTR(bp);
if (be16_to_cpu(node->hdr.info.magic) != XFS_DA_NODE_MAGIC) {
do_warn(_("bad dir/attr magic number in inode %llu, "
"file bno = %u, fsbno = %llu\n"),
da_cursor->ino, bno, fsbno);
libxfs_putbuf(bp);
goto error_out;
}
if (be16_to_cpu(node->hdr.count) >
mp->m_dir_node_ents) {
do_warn(_("bad record count in inode %llu, "
"count = %d, max = %d\n"),
da_cursor->ino,
be16_to_cpu(node->hdr.count),
mp->m_dir_node_ents);
libxfs_putbuf(bp);
goto error_out;
}
/*
* maintain level counter
*/
if (i == -1)
i = da_cursor->active = be16_to_cpu(node->hdr.level);
else {
if (be16_to_cpu(node->hdr.level) == i - 1) {
i--;
} else {
if (whichfork == XFS_DATA_FORK)
do_warn(_("bad directory btree for "
"directory inode %llu\n"),
da_cursor->ino);
else
do_warn(_("bad attribute fork btree "
"for inode %llu\n"),
da_cursor->ino);
libxfs_putbuf(bp);
goto error_out;
}
}
da_cursor->level[i].hashval = be32_to_cpu(
node->btree[0].hashval);
da_cursor->level[i].bp = bp;
da_cursor->level[i].bno = bno;
da_cursor->level[i].index = 0;
#ifdef XR_DIR_TRACE
da_cursor->level[i].n = XFS_BUF_TO_DA_INTNODE(bp);
#endif
/*
* set up new bno for next level down
*/
bno = be32_to_cpu(node->btree[0].before);
} while (node != NULL && i > 1);
/*
* now return block number and get out
*/
*rbno = da_cursor->level[0].bno = bno;
return(1);
error_out:
while (i > 1 && i <= da_cursor->active) {
libxfs_putbuf(da_cursor->level[i].bp);
i++;
}
return(0);
}
/*
* blow out buffer for this level and all the rest above as well
* if error == 0, we are not expecting to encounter any unreleased
* buffers (e.g. if we do, it's a mistake). if error == 1, we're
* in an error-handling case so unreleased buffers may exist.
*/
void
release_da_cursor_int(xfs_mount_t *mp,
da_bt_cursor_t *cursor,
int prev_level,
int error)
{
int level = prev_level + 1;
if (cursor->level[level].bp != NULL) {
if (!error) {
do_warn(_("release_da_cursor_int got unexpected "
"non-null bp, dabno = %u\n"),
cursor->level[level].bno);
}
ASSERT(error != 0);
libxfs_putbuf(cursor->level[level].bp);
cursor->level[level].bp = NULL;
}
if (level < cursor->active)
release_da_cursor_int(mp, cursor, level, error);
return;
}
void
release_da_cursor(xfs_mount_t *mp,
da_bt_cursor_t *cursor,
int prev_level)
{
release_da_cursor_int(mp, cursor, prev_level, 0);
}
void
err_release_da_cursor(xfs_mount_t *mp,
da_bt_cursor_t *cursor,
int prev_level)
{
release_da_cursor_int(mp, cursor, prev_level, 1);
}
/*
* like traverse_int_dablock only it does far less checking
* and doesn't maintain the cursor. Just gets you to the
* leftmost block in the directory. returns the fsbno
* of that block if successful, NULLDFSBNO if not.
*/
xfs_dfsbno_t
get_first_dblock_fsbno(xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dino)
{
xfs_dablk_t bno;
int i;
xfs_da_intnode_t *node;
xfs_dfsbno_t fsbno;
xfs_buf_t *bp;
/*
* traverse down left-side of tree until we hit the
* left-most leaf block setting up the btree cursor along
* the way.
*/
bno = 0;
i = -1;
node = NULL;
fsbno = get_bmapi(mp, dino, ino, bno, XFS_DATA_FORK);
if (fsbno == NULLDFSBNO) {
do_warn(_("bmap of block #%u of inode %llu failed\n"),
bno, ino);
return(fsbno);
}
if (be64_to_cpu(dino->di_core.di_size) <= XFS_LBSIZE(mp))
return(fsbno);
do {
/*
* walk down left side of btree, release buffers as you
* go. if the root block is a leaf (single-level btree),
* just return it.
*
*/
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, fsbno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
do_warn(_("can't read block %u (fsbno %llu) "
"for directory inode %llu\n"),
bno, fsbno, ino);
return(NULLDFSBNO);
}
node = (xfs_da_intnode_t *)XFS_BUF_PTR(bp);
if (XFS_DA_NODE_MAGIC !=
be16_to_cpu(node->hdr.info.magic)) {
do_warn(_("bad dir/attr magic number in inode %llu, "
"file bno = %u, fsbno = %llu\n"),
ino, bno, fsbno);
libxfs_putbuf(bp);
return(NULLDFSBNO);
}
if (i == -1)
i = be16_to_cpu(node->hdr.level);
bno = be32_to_cpu(node->btree[0].before);
libxfs_putbuf(bp);
fsbno = get_bmapi(mp, dino, ino, bno, XFS_DATA_FORK);
if (fsbno == NULLDFSBNO) {
do_warn(_("bmap of block #%u of inode %llu failed\n"),
bno, ino);
return(NULLDFSBNO);
}
i--;
} while(i > 0);
return(fsbno);
}
/*
* make sure that all entries in all blocks along the right side of
* of the tree are used and hashval's are consistent. level is the
* level of the descendent block. returns 0 if good (even if it had
* to be fixed up), and 1 if bad. The right edge of the tree is
* technically a block boundary. this routine should be used then
* instead of verify_da_path().
*/
int
verify_final_da_path(xfs_mount_t *mp,
da_bt_cursor_t *cursor,
const int p_level)
{
xfs_da_intnode_t *node;
xfs_dahash_t hashval;
int bad = 0;
int entry;
int this_level = p_level + 1;
#ifdef XR_DIR_TRACE
fprintf(stderr, "in verify_final_da_path, this_level = %d\n",
this_level);
#endif
/*
* the index should point to the next "unprocessed" entry
* in the block which should be the final (rightmost) entry
*/
entry = cursor->level[this_level].index;
node = (xfs_da_intnode_t *)XFS_BUF_PTR(cursor->level[this_level].bp);
/*
* check internal block consistency on this level -- ensure
* that all entries are used, encountered and expected hashvals
* match, etc.
*/
if (entry != be16_to_cpu(node->hdr.count) - 1) {
do_warn(_("directory/attribute block used/count "
"inconsistency - %d/%hu\n"),
entry, be16_to_cpu(node->hdr.count));
bad++;
}
/*
* hash values monotonically increasing ???
*/
if (cursor->level[this_level].hashval >=
be32_to_cpu(node->btree[entry].hashval)) {
do_warn(_("directory/attribute block hashvalue inconsistency, "
"expected > %u / saw %u\n"),
cursor->level[this_level].hashval,
be32_to_cpu(node->btree[entry].hashval));
bad++;
}
if (be32_to_cpu(node->hdr.info.forw) != 0) {
do_warn(_("bad directory/attribute forward block pointer, "
"expected 0, saw %u\n"),
be32_to_cpu(node->hdr.info.forw));
bad++;
}
if (bad) {
do_warn(_("bad directory block in dir ino %llu\n"),
cursor->ino);
return(1);
}
/*
* keep track of greatest block # -- that gets
* us the length of the directory
*/
if (cursor->level[this_level].bno > cursor->greatest_bno)
cursor->greatest_bno = cursor->level[this_level].bno;
/*
* ok, now check descendant block number against this level
*/
if (cursor->level[p_level].bno != be32_to_cpu(
node->btree[entry].before)) {
#ifdef XR_DIR_TRACE
fprintf(stderr, "bad directory btree pointer, child bno should "
"be %d, block bno is %d, hashval is %u\n",
be16_to_cpu(node->btree[entry].before),
cursor->level[p_level].bno,
cursor->level[p_level].hashval);
fprintf(stderr, "verify_final_da_path returns 1 (bad) #1a\n");
#endif
return(1);
}
if (cursor->level[p_level].hashval != be32_to_cpu(
node->btree[entry].hashval)) {
if (!no_modify) {
do_warn(_("correcting bad hashval in non-leaf "
"dir/attr block\n\tin (level %d) in "
"inode %llu.\n"),
this_level, cursor->ino);
node->btree[entry].hashval = cpu_to_be32(
cursor->level[p_level].hashval);
cursor->level[this_level].dirty++;
} else {
do_warn(_("would correct bad hashval in non-leaf "
"dir/attr block\n\tin (level %d) in "
"inode %llu.\n"),
this_level, cursor->ino);
}
}
/*
* Note: squirrel hashval away _before_ releasing the
* buffer, preventing a use-after-free problem.
*/
hashval = be32_to_cpu(node->btree[entry].hashval);
/*
* release/write buffer
*/
ASSERT(cursor->level[this_level].dirty == 0 ||
(cursor->level[this_level].dirty && !no_modify));
if (cursor->level[this_level].dirty && !no_modify)
libxfs_writebuf(cursor->level[this_level].bp, 0);
else
libxfs_putbuf(cursor->level[this_level].bp);
cursor->level[this_level].bp = NULL;
/*
* bail out if this is the root block (top of tree)
*/
if (this_level >= cursor->active) {
#ifdef XR_DIR_TRACE
fprintf(stderr, "verify_final_da_path returns 0 (ok)\n");
#endif
return(0);
}
/*
* set hashvalue to correctly reflect the now-validated
* last entry in this block and continue upwards validation
*/
cursor->level[this_level].hashval = hashval;
return(verify_final_da_path(mp, cursor, this_level));
}
/*
* Verifies the path from a descendant block up to the root.
* Should be called when the descendant level traversal hits
* a block boundary before crossing the boundary (reading in a new
* block).
*
* the directory/attr btrees work differently to the other fs btrees.
* each interior block contains records that are <hashval, bno>
* pairs. The bno is a file bno, not a filesystem bno. The last
* hashvalue in the block <bno> will be <hashval>. BUT unlike
* the freespace btrees, the *last* value in each block gets
* propagated up the tree instead of the first value in each block.
* that is, the interior records point to child blocks and the *greatest*
* hash value contained by the child block is the one the block above
* uses as the key for the child block.
*
* level is the level of the descendent block. returns 0 if good,
* and 1 if bad. The descendant block may be a leaf block.
*
* the invariant here is that the values in the cursor for the
* levels beneath this level (this_level) and the cursor index
* for this level *must* be valid.
*
* that is, the hashval/bno info is accurate for all
* DESCENDANTS and match what the node[index] information
* for the current index in the cursor for this level.
*
* the index values in the cursor for the descendant level
* are allowed to be off by one as they will reflect the
* next entry at those levels to be processed.
*
* the hashvalue for the current level can't be set until
* we hit the last entry in the block so, it's garbage
* until set by this routine.
*
* bno and bp for the current block/level are always valid
* since they have to be set so we can get a buffer for the
* block.
*/
int
verify_da_path(xfs_mount_t *mp,
da_bt_cursor_t *cursor,
const int p_level)
{
xfs_da_intnode_t *node;
xfs_da_intnode_t *newnode;
xfs_dfsbno_t fsbno;
xfs_dablk_t dabno;
xfs_buf_t *bp;
int bad;
int entry;
int this_level = p_level + 1;
/*
* index is currently set to point to the entry that
* should be processed now in this level.
*/
entry = cursor->level[this_level].index;
node = (xfs_da_intnode_t *)XFS_BUF_PTR(cursor->level[this_level].bp);
/*
* if this block is out of entries, validate this
* block and move on to the next block.
* and update cursor value for said level
*/
if (entry >= be16_to_cpu(node->hdr.count)) {
/*
* update the hash value for this level before
* validating it. bno value should be ok since
* it was set when the block was first read in.
*/
cursor->level[this_level].hashval =
be32_to_cpu(node->btree[entry - 1].hashval);
/*
* keep track of greatest block # -- that gets
* us the length of the directory
*/
if (cursor->level[this_level].bno > cursor->greatest_bno)
cursor->greatest_bno = cursor->level[this_level].bno;
/*
* validate the path for the current used-up block
* before we trash it
*/
if (verify_da_path(mp, cursor, this_level))
return(1);
/*
* ok, now get the next buffer and check sibling pointers
*/
dabno = be32_to_cpu(node->hdr.info.forw);
ASSERT(dabno != 0);
fsbno = blkmap_get(cursor->blkmap, dabno);
if (fsbno == NULLDFSBNO) {
do_warn(_("can't get map info for block %u "
"of directory inode %llu\n"),
dabno, cursor->ino);
return(1);
}
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, fsbno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
do_warn(_("can't read block %u (%llu) "
"for directory inode %llu\n"),
dabno, fsbno, cursor->ino);
return(1);
}
newnode = (xfs_da_intnode_t *)XFS_BUF_PTR(bp);
/*
* verify magic number and back pointer, sanity-check
* entry count, verify level
*/
bad = 0;
if (XFS_DA_NODE_MAGIC != be16_to_cpu(newnode->hdr.info.magic)) {
do_warn(_("bad magic number %x in block %u (%llu) "
"for directory inode %llu\n"),
be16_to_cpu(newnode->hdr.info.magic),
dabno, fsbno, cursor->ino);
bad++;
}
if (be32_to_cpu(newnode->hdr.info.back) !=
cursor->level[this_level].bno) {
do_warn(_("bad back pointer in block %u (%llu) "
"for directory inode %llu\n"),
dabno, fsbno, cursor->ino);
bad++;
}
if (be16_to_cpu(newnode->hdr.count) > mp->m_dir_node_ents) {
do_warn(_("entry count %d too large in block %u (%llu) "
"for directory inode %llu\n"),
be16_to_cpu(newnode->hdr.count),
dabno, fsbno, cursor->ino);
bad++;
}
if (be16_to_cpu(newnode->hdr.level) != this_level) {
do_warn(_("bad level %d in block %u (%llu) "
"for directory inode %llu\n"),
be16_to_cpu(newnode->hdr.level),
dabno, fsbno, cursor->ino);
bad++;
}
if (bad) {
#ifdef XR_DIR_TRACE
fprintf(stderr, "verify_da_path returns 1 (bad) #4\n");
#endif
libxfs_putbuf(bp);
return(1);
}
/*
* update cursor, write out the *current* level if
* required. don't write out the descendant level
*/
ASSERT(cursor->level[this_level].dirty == 0 ||
(cursor->level[this_level].dirty && !no_modify));
if (cursor->level[this_level].dirty && !no_modify)
libxfs_writebuf(cursor->level[this_level].bp, 0);
else
libxfs_putbuf(cursor->level[this_level].bp);
cursor->level[this_level].bp = bp;
cursor->level[this_level].dirty = 0;
cursor->level[this_level].bno = dabno;
cursor->level[this_level].hashval =
be32_to_cpu(newnode->btree[0].hashval);
#ifdef XR_DIR_TRACE
cursor->level[this_level].n = newnode;
#endif
node = newnode;
entry = cursor->level[this_level].index = 0;
}
/*
* ditto for block numbers
*/
if (cursor->level[p_level].bno !=
be32_to_cpu(node->btree[entry].before)) {
#ifdef XR_DIR_TRACE
fprintf(stderr, "bad directory btree pointer, child bno "
"should be %d, block bno is %d, hashval is %u\n",
be32_to_cpu(node->btree[entry].before),
cursor->level[p_level].bno,
cursor->level[p_level].hashval);
fprintf(stderr, "verify_da_path returns 1 (bad) #1a\n");
#endif
return(1);
}
/*
* ok, now validate last hashvalue in the descendant
* block against the hashval in the current entry
*/
if (cursor->level[p_level].hashval !=
be32_to_cpu(node->btree[entry].hashval)) {
if (!no_modify) {
do_warn(_("correcting bad hashval in interior "
"dir/attr block\n\tin (level %d) in "
"inode %llu.\n"),
this_level, cursor->ino);
node->btree[entry].hashval = cpu_to_be32(
cursor->level[p_level].hashval);
cursor->level[this_level].dirty++;
} else {
do_warn(_("would correct bad hashval in interior "
"dir/attr block\n\tin (level %d) in "
"inode %llu.\n"),
this_level, cursor->ino);
}
}
/*
* increment index for this level to point to next entry
* (which should point to the next descendant block)
*/
cursor->level[this_level].index++;
#ifdef XR_DIR_TRACE
fprintf(stderr, "verify_da_path returns 0 (ok)\n");
#endif
return(0);
}
size_t ts_dirbuf_size = 64*1024;
/*
* called by both node dir and leaf dir processing routines
* validates all contents *but* the sibling pointers (forw/back)
* and the magic number.
*
* returns 0 if the directory is ok or has been brought to the
* stage that it can be fixed up later (in phase 6),
* 1 if it has to be junked.
*
* Right now we fix a lot of things (TBD == to be deleted).
*
* incorrect . entries - inode # is corrected
* entries with mismatched hashvalue/name strings - hashvalue reset
* entries whose hashvalues are out-of-order - entry marked TBD
* .. entries with invalid inode numbers - entry marked TBD
* entries with invalid inode numbers - entry marked TBD
* multiple . entries - all but the first entry are marked TBD
* zero-length entries - entry is deleted
* entries with an out-of-bounds name index ptr - entry is deleted
*
* entries marked TBD have the first character of the name (which
* lives in the heap) have the first character in the name set
* to '/' -- an illegal value.
*
* entries deleted right here are deleted by blowing away the entry
* (but leaving the heap untouched). any space that was used
* by the deleted entry will be reclaimed by the block freespace
* (da_freemap) processing code.
*
* if two entries claim the same space in the heap (say, due to
* bad entry name index pointers), we lose the directory. We could
* try harder to fix this but it'll do for now.
*/
/* ARGSUSED */
int
process_leaf_dir_block(
xfs_mount_t *mp,
xfs_dir_leafblock_t *leaf,
xfs_dablk_t da_bno,
xfs_ino_t ino,
xfs_dahash_t last_hashval, /* last hashval encountered */
int ino_discovery,
blkmap_t *blkmap,
int *dot,
int *dotdot,
xfs_ino_t *parent,
int *buf_dirty, /* is buffer dirty? */
xfs_dahash_t *next_hashval) /* greatest hashval in block */
{
xfs_ino_t lino;
xfs_dir_leaf_entry_t *entry;
xfs_dir_leaf_entry_t *s_entry;
xfs_dir_leaf_entry_t *d_entry;
xfs_dir_leafblock_t *new_leaf;
char *first_byte;
xfs_dir_leaf_name_t *namest;
ino_tree_node_t *irec_p;
int num_entries;
xfs_dahash_t hashval;
int i;
int nm_illegal;
int bytes;
int start;
int stop;
int res = 0;
int ino_off;
int first_used;
int bytes_used;
int reset_holes;
int zero_len_entries;
char fname[MAXNAMELEN + 1];
da_hole_map_t holemap;
da_hole_map_t bholemap;
unsigned char *dir_freemap = ts_dir_freemap();
#ifdef XR_DIR_TRACE
fprintf(stderr, "\tprocess_leaf_dir_block - ino %llu\n", ino);
#endif
/*
* clear static dir block freespace bitmap
*/
init_da_freemap(dir_freemap);
*buf_dirty = 0;
first_used = mp->m_sb.sb_blocksize;
zero_len_entries = 0;
bytes_used = 0;
i = stop = sizeof(xfs_dir_leaf_hdr_t);
if (set_da_freemap(mp, dir_freemap, 0, stop)) {
do_warn(
_("directory block header conflicts with used space in directory inode %llu\n"),
ino);
return(1);
}
/*
* verify structure: monotonically increasing hash value for
* all leaf entries, indexes for all entries must be within
* this fs block (trivially true for 64K blocks). also track
* used space so we can check the freespace map. check for
* zero-length entries. for now, if anything's wrong, we
* junk the directory and we'll pick up no-longer referenced
* inodes on a later pass.
*/
for (i = 0, entry = &leaf->entries[0];
i < be16_to_cpu(leaf->hdr.count);
i++, entry++) {
/*
* check that the name index isn't out of bounds
* if it is, delete the entry since we can't
* grab the inode #.
*/
if (be16_to_cpu(entry->nameidx) >=
mp->m_sb.sb_blocksize) {
if (!no_modify) {
*buf_dirty = 1;
if (be16_to_cpu(leaf->hdr.count) > 1) {
do_warn(
_("nameidx %d for entry #%d, bno %d, ino %llu > fs blocksize, deleting entry\n"),
be16_to_cpu(entry->nameidx),
i, da_bno, ino);
ASSERT(be16_to_cpu(leaf->hdr.count) > i);
bytes = (be16_to_cpu(leaf->hdr.count) - i) *
sizeof(xfs_dir_leaf_entry_t);
/*
* compress table unless we're
* only dealing with 1 entry
* (the last one) in which case
* just zero it.
*/
if (bytes >
sizeof(xfs_dir_leaf_entry_t)) {
memmove(entry, entry + 1,
bytes);
memset((void *)
((__psint_t) entry + bytes), 0,
sizeof(xfs_dir_leaf_entry_t));
} else {
memset(entry, 0,
sizeof(xfs_dir_leaf_entry_t));
}
/*
* sync vars to match smaller table.
* don't have to worry about freespace
* map since we haven't set it for
* this entry yet.
*/
be16_add_cpu(&leaf->hdr.count, -1);
i--;
entry--;
} else {
do_warn(
_("nameidx %d, entry #%d, bno %d, ino %llu > fs blocksize, marking entry bad\n"),
be16_to_cpu(entry->nameidx),
i, da_bno, ino);
entry->nameidx = cpu_to_be16(
mp->m_sb.sb_blocksize -
sizeof(xfs_dir_leaf_name_t));
namest = xfs_dir_leaf_namestruct(leaf,
be16_to_cpu(entry->nameidx));
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino,
&namest->inumber);
namest->name[0] = '/';
}
} else {
do_warn(
_("nameidx %d, entry #%d, bno %d, ino %llu > fs blocksize, would delete entry\n"),
be16_to_cpu(entry->nameidx),
i, da_bno, ino);
}
continue;
}
/*
* inode processing -- make sure the inode
* is in our tree or we add it to the uncertain
* list if the inode # is valid. if namelen is 0,
* we can still try for the inode as long as nameidx
* is ok.
*/
namest = xfs_dir_leaf_namestruct(leaf,
be16_to_cpu(entry->nameidx));
xfs_dir_sf_get_dirino(&namest->inumber, &lino);
/*
* we may have to blow out an entry because of bad
* inode numbers. do NOT touch the name until after
* we've computed the hashvalue and done a namecheck()
* on the name.
*/
if (!ino_discovery && lino == NULLFSINO) {
/*
* don't do a damned thing. We already
* found this (or did it ourselves) during
* phase 3.
*/
} else if (verify_inum(mp, lino)) {
/*
* bad inode number. clear the inode
* number and the entry will get removed
* later. We don't trash the directory
* since it's still structurally intact.
*/
do_warn(
_("invalid ino number %llu in dir ino %llu, entry #%d, bno %d\n"),
lino, ino, i, da_bno);
if (!no_modify) {
do_warn(
_("\tclearing ino number in entry %d...\n"),
i);
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("\twould clear ino number in entry %d...\n"),
i);
}
} else if (lino == mp->m_sb.sb_rbmino) {
do_warn(
_("entry #%d, bno %d in directory %llu references realtime bitmap inode %llu\n"),
i, da_bno, ino, lino);
if (!no_modify) {
do_warn(
_("\tclearing ino number in entry %d...\n"),
i);
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("\twould clear ino number in entry %d...\n"),
i);
}
} else if (lino == mp->m_sb.sb_rsumino) {
do_warn(
_("entry #%d, bno %d in directory %llu references realtime summary inode %llu\n"),
i, da_bno, ino, lino);
if (!no_modify) {
do_warn(
_("\tclearing ino number in entry %d...\n"), i);
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("\twould clear ino number in entry %d...\n"),
i);
}
} else if (lino == mp->m_sb.sb_uquotino) {
do_warn(
_("entry #%d, bno %d in directory %llu references user quota inode %llu\n"),
i, da_bno, ino, lino);
if (!no_modify) {
do_warn(
_("\tclearing ino number in entry %d...\n"),
i);
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("\twould clear ino number in entry %d...\n"),
i);
}
} else if (lino == mp->m_sb.sb_gquotino) {
do_warn(
_("entry #%d, bno %d in directory %llu references group quota inode %llu\n"),
i, da_bno, ino, lino);
if (!no_modify) {
do_warn(
_("\tclearing ino number in entry %d...\n"),
i);
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("\twould clear ino number in entry %d...\n"),
i);
}
} else if ((irec_p = find_inode_rec(
XFS_INO_TO_AGNO(mp, lino),
XFS_INO_TO_AGINO(mp, lino))) != NULL) {
/*
* inode recs should have only confirmed
* inodes in them
*/
ino_off = XFS_INO_TO_AGINO(mp, lino) -
irec_p->ino_startnum;
ASSERT(is_inode_confirmed(irec_p, ino_off));
/*
* if inode is marked free and we're in inode
* discovery mode, leave the entry alone for now.
* if the inode turns out to be used, we'll figure
* that out when we scan it. If the inode really
* is free, we'll hit this code again in phase 4
* after we've finished inode discovery and blow
* out the entry then.
*/
if (!ino_discovery && is_inode_free(irec_p, ino_off)) {
if (!no_modify) {
do_warn(
_("entry references free inode %llu in directory %llu, will clear entry\n"),
lino, ino);
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino,
&namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("entry references free inode %llu in directory %llu, would clear entry\n"),
lino, ino);
}
}
} else if (ino_discovery) {
add_inode_uncertain(mp, lino, 0);
} else {
do_warn(
_("bad ino number %llu in dir ino %llu, entry #%d, bno %d\n"),
lino, ino, i, da_bno);
if (!no_modify) {
do_warn(_("clearing inode number...\n"));
lino = NULLFSINO;
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(_("would clear inode number...\n"));
}
}
/*
* if we have a zero-length entry, trash it.
* we may lose the inode (chunk) if we don't
* finish the repair successfully and the inode
* isn't mentioned anywhere else (like in the inode
* tree) but the alternative is to risk losing the
* entire directory by trying to use the next byte
* to turn the entry into a 1-char entry. That's
* probably a safe bet but if it didn't work, we'd
* lose the entire directory the way we currently do
* things. (Maybe we should change that later :-).
*/
if (entry->namelen == 0) {
*buf_dirty = 1;
if (be16_to_cpu(leaf->hdr.count) > 1) {
do_warn(
_("entry #%d, dir inode %llu, has zero-len name, deleting entry\n"),
i, ino);
ASSERT(be16_to_cpu(leaf->hdr.count) > i);
bytes = (be16_to_cpu(leaf->hdr.count) - i) *
sizeof(xfs_dir_leaf_entry_t);
/*
* compress table unless we're
* only dealing with 1 entry
* (the last one) in which case
* just zero it.
*/
if (bytes > sizeof(xfs_dir_leaf_entry_t)) {
memmove(entry, entry + 1, bytes);
memset((void *)((__psint_t) entry +
bytes), 0,
sizeof(xfs_dir_leaf_entry_t));
} else {
memset(entry, 0,
sizeof(xfs_dir_leaf_entry_t));
}
/*
* sync vars to match smaller table.
* don't have to worry about freespace
* map since we haven't set it for
* this entry yet.
*/
be16_add_cpu(&leaf->hdr.count, -1);
i--;
entry--;
} else {
/*
* if it's the only entry, preserve the
* inode number for now
*/
do_warn(
_("entry #%d, dir inode %llu, has zero-len name, marking entry bad\n"),
i, ino);
entry->nameidx = cpu_to_be16(
mp->m_sb.sb_blocksize -
sizeof(xfs_dir_leaf_name_t));
namest = xfs_dir_leaf_namestruct(leaf,
be16_to_cpu(entry->nameidx));
xfs_dir_sf_put_dirino(&lino, &namest->inumber);
namest->name[0] = '/';
}
} else if (be16_to_cpu(entry->nameidx) + entry->namelen >
XFS_LBSIZE(mp)) {
do_warn(
_("bad size, entry #%d in dir inode %llu, block %u -- entry overflows block\n"),
i, ino, da_bno);
return(1);
}
start = (__psint_t)&leaf->entries[i] - (__psint_t)leaf;;
stop = start + sizeof(xfs_dir_leaf_entry_t);
if (set_da_freemap(mp, dir_freemap, start, stop)) {
do_warn(
_("dir entry slot %d in block %u conflicts with used space in dir inode %llu\n"),
i, da_bno, ino);
return(1);
}
/*
* check if the name is legal. if so, then
* check that the name and hashvalues match.
*
* if the name is illegal, we don't check the
* hashvalue computed from it. we just make
* sure that the hashvalue in the entry is
* monotonically increasing wrt to the previous
* entry.
*
* Note that we do NOT have to check the length
* because the length is stored in a one-byte
* unsigned int which max's out at MAXNAMELEN
* making it impossible for the stored length
* value to be out of range.
*/
memmove(fname, namest->name, entry->namelen);
fname[entry->namelen] = '\0';
hashval = libxfs_da_hashname((uchar_t *) fname, entry->namelen);
/*
* only complain about illegal names in phase 3 (when
* inode discovery is turned on). Otherwise, we'd complain
* a lot during phase 4. If the name is illegal, leave
* the hash value in that entry alone.
*/
nm_illegal = namecheck(fname, entry->namelen);
if (ino_discovery && nm_illegal) {
/*
* junk the entry, illegal name
*/
if (!no_modify) {
do_warn(
_("illegal name \"%s\" in directory inode %llu, entry will be cleared\n"),
fname, ino);
namest->name[0] = '/';
*buf_dirty = 1;
} else {
do_warn(
_("illegal name \"%s\" in directory inode %llu, entry would be cleared\n"),
fname, ino);
}
} else if (!nm_illegal &&
be32_to_cpu(entry->hashval) != hashval) {
/*
* try resetting the hashvalue to the correct
* value for the string, if the string has been
* corrupted, too, that will get picked up next
*/
do_warn(_("\tmismatched hash value for entry \"%s\"\n"),
fname);
if (!no_modify) {
do_warn(
_("\t\tin directory inode %llu. resetting hash value.\n"),
ino);
entry->hashval = cpu_to_be32(hashval);
*buf_dirty = 1;
} else {
do_warn(
_("\t\tin directory inode %llu. would reset hash value.\n"),
ino);
}
}
/*
* now we can mark entries with NULLFSINO's bad
*/
if (!no_modify && lino == NULLFSINO) {
namest->name[0] = '/';
*buf_dirty = 1;
}
/*
* regardless of whether the entry has or hasn't been
* marked for deletion, the hash value ordering must
* be maintained.
*/
if (be32_to_cpu(entry->hashval) < last_hashval) {
/*
* blow out the entry -- set hashval to sane value
* and set the first character in the string to
* the illegal value '/'. Reset the hash value
* to the last hashvalue so that verify_da_path
* will fix up the interior pointers correctly.
* the entry will be deleted later (by routines
* that need only the entry #). We keep the
* inode number in the entry so we can attach
* the inode to the orphanage later.
*/
do_warn(_("\tbad hash ordering for entry \"%s\"\n"),
fname);
if (!no_modify) {
do_warn(
_("\t\tin directory inode %llu. will clear entry\n"),
ino);
entry->hashval = cpu_to_be32(last_hashval);
namest->name[0] = '/';
*buf_dirty = 1;
} else {
do_warn(
_("\t\tin directory inode %llu. would clear entry\n"),
ino);
}
}
*next_hashval = last_hashval = be32_to_cpu(entry->hashval);
/*
* if heap data conflicts with something,
* blow it out and skip the rest of the loop
*/
if (set_da_freemap(mp, dir_freemap, be16_to_cpu(entry->nameidx),
be16_to_cpu(entry->nameidx)
+ sizeof(xfs_dir_leaf_name_t)
+ entry->namelen - 1)) {
do_warn(
_("name \"%s\" (block %u, slot %d) conflicts with used space in dir inode %llu\n"),
fname, da_bno, i, ino);
if (!no_modify) {
entry->namelen = 0;
*buf_dirty = 1;
do_warn(
_("will clear entry \"%s\" (#%d) in directory inode %llu\n"),
fname, i, ino);
} else {
do_warn(
_("would clear entry \"%s\" (#%d)in directory inode %llu\n"),
fname, i, ino);
}
continue;
}
/*
* keep track of heap stats (first byte used, total bytes used)
*/
if (be16_to_cpu(entry->nameidx) < first_used)
first_used = be16_to_cpu(entry->nameidx);
bytes_used += entry->namelen;
/*
* special . or .. entry processing
*/
if (entry->namelen == 2 && namest->name[0] == '.' &&
namest->name[1] == '.') {
/*
* the '..' case
*/
if (!*dotdot) {
(*dotdot)++;
*parent = lino;
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_leaf_dir_block found .. entry (parent) = %llu\n", lino);
#endif
/*
* what if .. == .? legal only in
* the root inode. blow out entry
* and set parent to NULLFSINO otherwise.
*/
if (ino == lino &&
ino != mp->m_sb.sb_rootino) {
*parent = NULLFSINO;
do_warn(
_("bad .. entry in dir ino %llu, points to self"),
ino);
if (!no_modify) {
do_warn(
_("will clear entry\n"));
namest->name[0] = '/';
*buf_dirty = 1;
} else {
do_warn(
_("would clear entry\n"));
}
} else if (ino != lino &&
ino == mp->m_sb.sb_rootino) {
/*
* we have to make sure that . == ..
* in the root inode
*/
if (!no_modify) {
do_warn(
_("correcting .. entry in root inode %llu, was %llu\n"),
ino, *parent);
xfs_dir_sf_put_dirino(
&ino, &namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_("bad .. entry (%llu) in root inode %llu should be %llu\n"),
*parent,
ino, ino);
}
}
} else {
/*
* can't fix the directory unless we know
* which .. entry is the right one. Both
* have valid inode numbers, match the hash
* value and the hash values are ordered
* properly or we wouldn't be here. So
* since both seem equally valid, trash
* this one.
*/
if (!no_modify) {
do_warn(
_("multiple .. entries in directory inode %llu, will clear second entry\n"),
ino);
namest->name[0] = '/';
*buf_dirty = 1;
} else {
do_warn(
_("multiple .. entries in directory inode %llu, would clear second entry\n"),
ino);
}
}
} else if (entry->namelen == 1 && namest->name[0] == '.') {
/*
* the '.' case
*/
if (!*dot) {
(*dot)++;
if (lino != ino) {
if (!no_modify) {
do_warn(
_(". in directory inode %llu has wrong value (%llu), fixing entry...\n"),
ino, lino);
xfs_dir_sf_put_dirino(&ino,
&namest->inumber);
*buf_dirty = 1;
} else {
do_warn(
_(". in directory inode %llu has wrong value (%llu)\n"),
ino, lino);
}
}
} else {
do_warn(
_("multiple . entries in directory inode %llu\n"),
ino);
/*
* mark entry as to be junked.
*/
if (!no_modify) {
do_warn(
_("will clear one . entry in directory inode %llu\n"),
ino);
namest->name[0] = '/';
*buf_dirty = 1;
} else {
do_warn(
_("would clear one . entry in directory inode %llu\n"),
ino);
}
}
} else {
/*
* all the rest -- make sure only . references self
*/
if (lino == ino) {
do_warn(
_("entry \"%s\" in directory inode %llu points to self, "),
fname, ino);
if (!no_modify) {
do_warn(_("will clear entry\n"));
namest->name[0] = '/';
*buf_dirty = 1;
} else {
do_warn(_("would clear entry\n"));
}
}
}
}
/*
* compare top of heap values and reset as required. if the
* holes flag is set, don't reset first_used unless it's
* pointing to used bytes. we're being conservative here
* since the block will get compacted anyhow by the kernel.
*/
if ((leaf->hdr.holes == 0 &&
first_used != be16_to_cpu(leaf->hdr.firstused)) ||
be16_to_cpu(leaf->hdr.firstused) > first_used) {
if (!no_modify) {
if (verbose)
do_warn(
_("- resetting first used heap value from %d to %d in block %u of dir ino %llu\n"),
be16_to_cpu(leaf->hdr.firstused),
first_used, da_bno, ino);
leaf->hdr.firstused = cpu_to_be16(first_used);
*buf_dirty = 1;
} else {
if (verbose)
do_warn(
_("- would reset first used value from %d to %d in block %u of dir ino %llu\n"),
be16_to_cpu(leaf->hdr.firstused),
first_used, da_bno, ino);
}
}
if (bytes_used != be16_to_cpu(leaf->hdr.namebytes)) {
if (!no_modify) {
if (verbose)
do_warn(
_("- resetting namebytes cnt from %d to %d in block %u of dir inode %llu\n"),
be16_to_cpu(leaf->hdr.namebytes),
bytes_used, da_bno, ino);
leaf->hdr.namebytes = cpu_to_be16(bytes_used);
*buf_dirty = 1;
} else {
if (verbose)
do_warn(
_("- would reset namebytes cnt from %d to %d in block %u of dir inode %llu\n"),
be16_to_cpu(leaf->hdr.namebytes),
bytes_used, da_bno, ino);
}
}
/*
* If the hole flag is not set, then we know that there can
* be no lost holes. If the hole flag is set, then it's ok
* if the on-disk holemap doesn't describe everything as long
* as what it does describe doesn't conflict with reality.
*/
reset_holes = 0;
bholemap.lost_holes = leaf->hdr.holes;
for (i = 0; i < XFS_DIR_LEAF_MAPSIZE; i++) {
bholemap.hentries[i].base = be16_to_cpu(leaf->hdr.freemap[i].base);
bholemap.hentries[i].size = be16_to_cpu(leaf->hdr.freemap[i].size);
}
/*
* Ok, now set up our own freespace list
* (XFS_DIR_LEAF_MAPSIZE (3) * biggest regions)
* and see if they match what's in the block
*/
memset(&holemap, 0, sizeof(da_hole_map_t));
process_da_freemap(mp, dir_freemap, &holemap);
if (zero_len_entries) {
reset_holes = 1;
} else if (leaf->hdr.holes == 0) {
if (holemap.lost_holes > 0) {
if (verbose)
do_warn(
_("- found unexpected lost holes in block %u, dir inode %llu\n"),
da_bno, ino);
reset_holes = 1;
} else if (compare_da_freemaps(mp, &holemap, &bholemap,
XFS_DIR_LEAF_MAPSIZE, ino, da_bno)) {
if (verbose)
do_warn(
_("- hole info non-optimal in block %u, dir inode %llu\n"),
da_bno, ino);
reset_holes = 1;
}
} else if (verify_da_freemap(mp, dir_freemap, &holemap, ino, da_bno)) {
if (verbose)
do_warn(
_("- hole info incorrect in block %u, dir inode %llu\n"),
da_bno, ino);
reset_holes = 1;
}
if (reset_holes) {
/*
* have to reset block hole info
*/
if (verbose) {
do_warn(
_("- existing hole info for block %d, dir inode %llu (base, size) - \n"),
da_bno, ino);
do_warn("- \t");
for (i = 0; i < XFS_DIR_LEAF_MAPSIZE; i++) {
do_warn(
"- (%d, %d) ", bholemap.hentries[i].base,
bholemap.hentries[i].size);
}
do_warn(_("- holes flag = %d\n"), bholemap.lost_holes);
}
if (!no_modify) {
if (verbose)
do_warn(
_("- compacting block %u in dir inode %llu\n"),
da_bno, ino);
new_leaf = (xfs_dir_leafblock_t *) ts_dirbuf();
/*
* copy leaf block header
*/
memmove(&new_leaf->hdr, &leaf->hdr,
sizeof(xfs_dir_leaf_hdr_t));
/*
* reset count in case we have some zero length entries
* that are being junked
*/
num_entries = 0;
first_used = XFS_LBSIZE(mp);
first_byte = (char *) new_leaf
+ (__psint_t) XFS_LBSIZE(mp);
/*
* copy entry table and pack names starting from the end
* of the block
*/
for (i = 0, s_entry = &leaf->entries[0],
d_entry = &new_leaf->entries[0];
i < be16_to_cpu(leaf->hdr.count);
i++, s_entry++) {
/*
* skip zero-length entries
*/
if (s_entry->namelen == 0)
continue;
bytes = sizeof(xfs_dir_leaf_name_t)
+ s_entry->namelen - 1;
if ((__psint_t) first_byte - bytes <
sizeof(xfs_dir_leaf_entry_t)
+ (__psint_t) d_entry) {
do_warn(
_("not enough space in block %u of dir inode %llu for all entries\n"),
da_bno, ino);
break;
}
first_used -= bytes;
first_byte -= bytes;
d_entry->nameidx = cpu_to_be16(first_used);
d_entry->hashval = s_entry->hashval;
d_entry->namelen = s_entry->namelen;
d_entry->pad2 = 0;
memmove(first_byte, (char *)leaf +
be16_to_cpu(s_entry->nameidx), bytes);
num_entries++;
d_entry++;
}
ASSERT((char *) first_byte >= (char *) d_entry);
ASSERT(first_used <= XFS_LBSIZE(mp));
/*
* zero space between end of table and top of heap
*/
memset(d_entry, 0, (__psint_t) first_byte
- (__psint_t) d_entry);
/*
* reset header info
*/
if (num_entries != be16_to_cpu(new_leaf->hdr.count))
new_leaf->hdr.count = cpu_to_be16(num_entries);
new_leaf->hdr.firstused = cpu_to_be16(first_used);
new_leaf->hdr.holes = 0;
new_leaf->hdr.pad1 = 0;
new_leaf->hdr.freemap[0].base = cpu_to_be16(
(__psint_t) d_entry - (__psint_t) new_leaf);
new_leaf->hdr.freemap[0].size = cpu_to_be16(
(__psint_t) first_byte - (__psint_t) d_entry);
ASSERT(be16_to_cpu(new_leaf->hdr.freemap[0].base) < first_used);
ASSERT(be16_to_cpu(new_leaf->hdr.freemap[0].base) ==
(__psint_t) (&new_leaf->entries[0])
- (__psint_t) new_leaf
+ i * sizeof(xfs_dir_leaf_entry_t));
ASSERT(be16_to_cpu(new_leaf->hdr.freemap[0].base) < XFS_LBSIZE(mp));
ASSERT(be16_to_cpu(new_leaf->hdr.freemap[0].size) < XFS_LBSIZE(mp));
ASSERT(be16_to_cpu(new_leaf->hdr.freemap[0].base) +
be16_to_cpu(new_leaf->hdr.freemap[0].size) == first_used);
new_leaf->hdr.freemap[1].base = 0;
new_leaf->hdr.freemap[1].size = 0;
new_leaf->hdr.freemap[2].base = 0;
new_leaf->hdr.freemap[2].size = 0;
/*
* final step, copy block back
*/
memmove(leaf, new_leaf, mp->m_sb.sb_blocksize);
*buf_dirty = 1;
} else {
if (verbose)
do_warn(
_("- would compact block %u in dir inode %llu\n"),
da_bno, ino);
}
}
#if 0
if (!no_modify) {
/*
* now take care of deleting or marking the entries with
* zero-length namelen's
*/
junk_zerolen_dir_leaf_entries(mp, leaf, ino, buf_dirty);
}
#endif
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_leaf_dir_block returns %d\n", res);
#endif
return((res > 0) ? 1 : 0);
}
/*
* returns 0 if the directory is ok, 1 if it has to be junked.
*/
int
process_leaf_dir_level(xfs_mount_t *mp,
da_bt_cursor_t *da_cursor,
int ino_discovery,
int *repair,
int *dot,
int *dotdot,
xfs_ino_t *parent)
{
xfs_dir_leafblock_t *leaf;
xfs_buf_t *bp;
xfs_ino_t ino;
xfs_dfsbno_t dev_bno;
xfs_dablk_t da_bno;
xfs_dablk_t prev_bno;
int res = 0;
int buf_dirty = 0;
xfs_daddr_t bd_addr;
xfs_dahash_t current_hashval = 0;
xfs_dahash_t greatest_hashval;
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_leaf_dir_level - ino %llu\n", da_cursor->ino);
#endif
*repair = 0;
da_bno = da_cursor->level[0].bno;
ino = da_cursor->ino;
prev_bno = 0;
do {
dev_bno = blkmap_get(da_cursor->blkmap, da_bno);
/*
* directory code uses 0 as the NULL block pointer
* since 0 is the root block and no directory block
* pointer can point to the root block of the btree
*/
ASSERT(da_bno != 0);
if (dev_bno == NULLDFSBNO) {
do_warn(
_("can't map block %u for directory inode %llu\n"),
da_bno, ino);
goto error_out;
}
bd_addr = (xfs_daddr_t)XFS_FSB_TO_DADDR(mp, dev_bno);
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, dev_bno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
do_warn(
_("can't read file block %u (fsbno %llu, daddr %lld) "
"for directory inode %llu\n"),
da_bno, dev_bno, (__int64_t) bd_addr, ino);
goto error_out;
}
leaf = (xfs_dir_leafblock_t *)XFS_BUF_PTR(bp);
/*
* check magic number for leaf directory btree block
*/
if (XFS_DIR_LEAF_MAGIC !=
be16_to_cpu(leaf->hdr.info.magic)) {
do_warn(
_("bad directory leaf magic # %#x for dir ino %llu\n"),
be16_to_cpu(leaf->hdr.info.magic),
ino);
libxfs_putbuf(bp);
goto error_out;
}
/*
* keep track of greatest block # -- that gets
* us the length of the directory
*/
if (da_bno > da_cursor->greatest_bno)
da_cursor->greatest_bno = da_bno;
buf_dirty = 0;
/*
* for each block, process the block, verify its path,
* then get next block. update cursor values along the way
*/
if (process_leaf_dir_block(mp, leaf, da_bno, ino,
current_hashval, ino_discovery,
da_cursor->blkmap, dot, dotdot, parent,
&buf_dirty, &greatest_hashval)) {
libxfs_putbuf(bp);
goto error_out;
}
/*
* index can be set to hdr.count so match the
* indexes of the interior blocks -- which at the
* end of the block will point to 1 after the final
* real entry in the block
*/
da_cursor->level[0].hashval = greatest_hashval;
da_cursor->level[0].bp = bp;
da_cursor->level[0].bno = da_bno;
da_cursor->level[0].index = be16_to_cpu(leaf->hdr.count);
da_cursor->level[0].dirty = buf_dirty;
if (be32_to_cpu(leaf->hdr.info.back) != prev_bno) {
do_warn(_("bad sibling back pointer for directory "
"block %u in directory inode %llu\n"),
da_bno, ino);
libxfs_putbuf(bp);
goto error_out;
}
prev_bno = da_bno;
da_bno = be32_to_cpu(leaf->hdr.info.forw);
if (da_bno != 0)
if (verify_da_path(mp, da_cursor, 0)) {
libxfs_putbuf(bp);
goto error_out;
}
current_hashval = greatest_hashval;
ASSERT(buf_dirty == 0 || (buf_dirty && !no_modify));
if (buf_dirty && !no_modify) {
*repair = 1;
libxfs_writebuf(bp, 0);
}
else
libxfs_putbuf(bp);
} while (da_bno != 0 && res == 0);
if (verify_final_da_path(mp, da_cursor, 0)) {
/*
* verify the final path up (right-hand-side) if still ok
*/
do_warn(_("bad hash path in directory %llu\n"), da_cursor->ino);
goto error_out;
}
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_leaf_dir_level returns %d (%s)\n",
res, ((res) ? "bad" : "ok"));
#endif
/*
* redundant but just for testing
*/
release_da_cursor(mp, da_cursor, 0);
return(res);
error_out:
/*
* release all buffers holding interior btree blocks
*/
err_release_da_cursor(mp, da_cursor, 0);
return(1);
}
/*
* a node directory is a true btree directory -- where the directory
* has gotten big enough that it is represented as a non-trivial (e.g.
* has more than just a root block) btree.
*
* Note that if we run into any problems, we trash the
* directory. Even if it's the root directory,
* we'll be able to traverse all the disconnected
* subtrees later (phase 6).
*
* one day, if we actually fix things, we'll set repair to 1 to
* indicate that we have or that we should.
*
* dirname can be set to NULL if the name is unknown (or to
* the string representation of the inode)
*
* returns 0 if things are ok, 1 if bad (directory needs to be junked)
*/
/* ARGSUSED */
int
process_node_dir(
xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dip,
int ino_discovery,
blkmap_t *blkmap,
int *dot,
int *dotdot,
xfs_ino_t *parent, /* out - parent ino # or NULLFSINO */
char *dirname,
int *repair)
{
xfs_dablk_t bno;
int error = 0;
da_bt_cursor_t da_cursor;
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_node_dir - ino %llu\n", ino);
#endif
*repair = *dot = *dotdot = 0;
*parent = NULLFSINO;
/*
* try again -- traverse down left-side of tree until we hit
* the left-most leaf block setting up the btree cursor along
* the way. Then walk the leaf blocks left-to-right, calling
* a parent-verification routine each time we traverse a block.
*/
memset(&da_cursor, 0, sizeof(da_bt_cursor_t));
da_cursor.active = 0;
da_cursor.type = 0;
da_cursor.ino = ino;
da_cursor.dip = dip;
da_cursor.greatest_bno = 0;
da_cursor.blkmap = blkmap;
/*
* now process interior node
*/
error = traverse_int_dablock(mp, &da_cursor, &bno, XFS_DATA_FORK);
if (error == 0)
return(1);
/*
* now pass cursor and bno into leaf-block processing routine
* the leaf dir level routine checks the interior paths
* up to the root including the final right-most path.
*/
error = process_leaf_dir_level(mp, &da_cursor, ino_discovery,
repair, dot, dotdot, parent);
if (error)
return(1);
/*
* sanity check inode size
*/
if (be64_to_cpu(dip->di_core.di_size) <
(da_cursor.greatest_bno + 1) * mp->m_sb.sb_blocksize) {
if ((xfs_fsize_t) da_cursor.greatest_bno
* mp->m_sb.sb_blocksize > UINT_MAX) {
do_warn(
_("out of range internal directory block numbers (inode %llu)\n"),
ino);
return(1);
}
do_warn(
_("setting directory inode (%llu) size to %llu bytes, was %lld bytes\n"),
ino, (xfs_dfiloff_t) (da_cursor.greatest_bno + 1)
* mp->m_sb.sb_blocksize,
be64_to_cpu(dip->di_core.di_size));
dip->di_core.di_size = cpu_to_be64((da_cursor.greatest_bno + 1)
* mp->m_sb.sb_blocksize);
}
return(0);
}
/*
* a leaf directory is one where the directory is too big for
* the inode data fork but is small enough to fit into one
* directory btree block (filesystem block) outside the inode
*
* returns NULLFSINO if the directory is cannot be salvaged
* and the .. ino if things are ok (even if the directory had
* to be altered to make it ok).
*
* dirname can be set to NULL if the name is unknown (or to
* the string representation of the inode)
*
* returns 0 if things are ok, 1 if bad (directory needs to be junked)
*/
/* ARGSUSED */
int
process_leaf_dir(
xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dip,
int ino_discovery,
int *dino_dirty,
blkmap_t *blkmap,
int *dot, /* out - 1 if there is a dot, else 0 */
int *dotdot, /* out - 1 if there's a dotdot, else 0 */
xfs_ino_t *parent, /* out - parent ino # or NULLFSINO */
char *dirname, /* in - directory pathname */
int *repair) /* out - 1 if something was fixed */
{
xfs_dir_leafblock_t *leaf;
xfs_dahash_t next_hashval;
xfs_dfsbno_t bno;
xfs_buf_t *bp;
int buf_dirty = 0;
#ifdef XR_DIR_TRACE
fprintf(stderr, "process_leaf_dir - ino %llu\n", ino);
#endif
*repair = *dot = *dotdot = 0;
*parent = NULLFSINO;
bno = blkmap_get(blkmap, 0);
if (bno == NULLDFSBNO) {
do_warn(_("block 0 for directory inode %llu is missing\n"),
ino);
return(1);
}
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, bno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
do_warn(_("can't read block 0 for directory inode %llu\n"),
ino);
return(1);
}
/*
* verify leaf block
*/
leaf = (xfs_dir_leafblock_t *)XFS_BUF_PTR(bp);
/*
* check magic number for leaf directory btree block
*/
if (be16_to_cpu(leaf->hdr.info.magic) != XFS_DIR_LEAF_MAGIC) {
do_warn(_("bad directory leaf magic # %#x for dir ino %llu\n"),
be16_to_cpu(leaf->hdr.info.magic), ino);
libxfs_putbuf(bp);
return(1);
}
if (process_leaf_dir_block(mp, leaf, 0, ino, 0, ino_discovery, blkmap,
dot, dotdot, parent, &buf_dirty, &next_hashval)) {
/*
* the block is bad. lose the directory.
* XXX - later, we should try and just lose
* the block without losing the entire directory
*/
ASSERT(*dotdot == 0 || (*dotdot == 1 && *parent != NULLFSINO));
libxfs_putbuf(bp);
return(1);
}
/*
* check sibling pointers in leaf block (above doesn't do it)
*/
if (leaf->hdr.info.forw || leaf->hdr.info.back) {
if (!no_modify) {
do_warn(_("clearing forw/back pointers for "
"directory inode %llu\n"), ino);
buf_dirty = 1;
leaf->hdr.info.forw = 0;
leaf->hdr.info.back = 0;
} else {
do_warn(_("would clear forw/back pointers for "
"directory inode %llu\n"), ino);
}
}
ASSERT(buf_dirty == 0 || (buf_dirty && !no_modify));
if (buf_dirty && !no_modify)
libxfs_writebuf(bp, 0);
else
libxfs_putbuf(bp);
return(0);
}
/*
* returns 1 if things are bad (directory needs to be junked)
* and 0 if things are ok. If ino_discovery is 1, add unknown
* inodes to uncertain inode list.
*/
int
process_dir(
xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dip,
int ino_discovery,
int *dino_dirty,
char *dirname,
xfs_ino_t *parent,
blkmap_t *blkmap)
{
int dot;
int dotdot;
int repair = 0;
int res = 0;
*parent = NULLFSINO;
dot = dotdot = 0;
/*
* branch off depending on the type of inode. This routine
* is only called ONCE so all the subordinate routines will
* fix '.' and junk '..' if they're bogus.
*/
if (be64_to_cpu(dip->di_core.di_size) <= XFS_DFORK_DSIZE(dip, mp)) {
dot = 1;
dotdot = 1;
if (process_shortform_dir(mp, ino, dip, ino_discovery,
dino_dirty, parent, dirname, &repair))
res = 1;
} else if (be64_to_cpu(dip->di_core.di_size) <= XFS_LBSIZE(mp)) {
if (process_leaf_dir(mp, ino, dip, ino_discovery,
dino_dirty, blkmap, &dot, &dotdot,
parent, dirname, &repair))
res = 1;
} else {
if (process_node_dir(mp, ino, dip, ino_discovery,
blkmap, &dot, &dotdot,
parent, dirname, &repair))
res = 1;
}
/*
* bad . entries in all directories will be fixed up in phase 6
*/
if (dot == 0)
do_warn(_("no . entry for directory %llu\n"), ino);
/*
* shortform dirs always have a .. entry. .. for all longform
* directories will get fixed in phase 6. .. for other shortform
* dirs also get fixed there. .. for a shortform root was
* fixed in place since we know what it should be
*/
if (dotdot == 0 && ino != mp->m_sb.sb_rootino) {
do_warn(_("no .. entry for directory %llu\n"), ino);
} else if (dotdot == 0 && ino == mp->m_sb.sb_rootino) {
do_warn(_("no .. entry for root directory %llu\n"), ino);
need_root_dotdot = 1;
}
#ifdef XR_DIR_TRACE
fprintf(stderr, "(process_dir), parent of %llu is %llu\n", ino, parent);
#endif
return(res);
}