File: [Development] / xfs-cmds / xfsprogs / repair / dinode.c (download)
Revision 1.32, Fri Sep 5 04:10:53 2008 UTC (9 years, 1 month ago) by bnaujok.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.31: +5 -0
lines
Check for invalid di_size in xfs_repair
Merge of master-melb:xfs-cmds:32051a by kenmcd.
Check for invalid inode di_size
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/*
* Copyright (c) 2000-2005 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 "dir.h"
#include "dir2.h"
#include "dinode.h"
#include "scan.h"
#include "versions.h"
#include "attr_repair.h"
#include "bmap.h"
#include "threads.h"
/*
* inode clearing routines
*/
/*
* return the offset into the inode where the attribute fork starts
*/
/* ARGSUSED */
int
calc_attr_offset(xfs_mount_t *mp, xfs_dinode_t *dino)
{
xfs_dinode_core_t *dinoc = &dino->di_core;
int offset = ((__psint_t) &dino->di_u)
- (__psint_t)dino;
/*
* don't worry about alignment when calculating offset
* because the data fork is already 8-byte aligned
*/
switch (dinoc->di_format) {
case XFS_DINODE_FMT_DEV:
offset += sizeof(xfs_dev_t);
break;
case XFS_DINODE_FMT_LOCAL:
offset += INT_GET(dinoc->di_size, ARCH_CONVERT);
break;
case XFS_DINODE_FMT_EXTENTS:
offset += INT_GET(dinoc->di_nextents, ARCH_CONVERT) * sizeof(xfs_bmbt_rec_32_t);
break;
case XFS_DINODE_FMT_BTREE:
offset += INT_GET(dino->di_u.di_bmbt.bb_numrecs, ARCH_CONVERT) * sizeof(xfs_bmbt_rec_32_t);
break;
default:
do_error(_("Unknown inode format.\n"));
abort();
break;
}
return(offset);
}
/* ARGSUSED */
int
clear_dinode_attr(xfs_mount_t *mp, xfs_dinode_t *dino, xfs_ino_t ino_num)
{
xfs_dinode_core_t *dinoc = &dino->di_core;
ASSERT(dinoc->di_forkoff != 0);
if (!no_modify)
fprintf(stderr, _("clearing inode %llu attributes\n"),
(unsigned long long)ino_num);
else
fprintf(stderr, _("would have cleared inode %llu attributes\n"),
(unsigned long long)ino_num);
if (INT_GET(dinoc->di_anextents, ARCH_CONVERT) != 0) {
if (no_modify)
return(1);
dinoc->di_anextents = 0;
}
if (dinoc->di_aformat != XFS_DINODE_FMT_EXTENTS) {
if (no_modify)
return(1);
dinoc->di_aformat = XFS_DINODE_FMT_EXTENTS;
}
/* get rid of the fork by clearing forkoff */
/* Originally, when the attr repair code was added, the fork was cleared
* by turning it into shortform status. This meant clearing the
* hdr.totsize/count fields and also changing aformat to LOCAL
* (vs EXTENTS). Over various fixes, the aformat and forkoff have
* been updated to not show an attribute fork at all, however.
* It could be possible that resetting totsize/count are not needed,
* but just to be safe, leave it in for now.
*/
if (!no_modify) {
xfs_attr_shortform_t *asf = (xfs_attr_shortform_t *)
XFS_DFORK_APTR(dino);
INT_SET(asf->hdr.totsize, ARCH_CONVERT,
sizeof(xfs_attr_sf_hdr_t));
INT_SET(asf->hdr.count, ARCH_CONVERT, 0);
dinoc->di_forkoff = 0; /* got to do this after asf is set */
}
/*
* always returns 1 since the fork gets zapped
*/
return(1);
}
/* ARGSUSED */
int
clear_dinode_core(xfs_dinode_core_t *dinoc, xfs_ino_t ino_num)
{
int dirty = 0;
if (INT_GET(dinoc->di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC) {
dirty = 1;
if (no_modify)
return(1);
INT_SET(dinoc->di_magic, ARCH_CONVERT, XFS_DINODE_MAGIC);
}
if (!XFS_DINODE_GOOD_VERSION(dinoc->di_version) ||
(!fs_inode_nlink && dinoc->di_version > XFS_DINODE_VERSION_1)) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_version = (fs_inode_nlink) ? XFS_DINODE_VERSION_2
: XFS_DINODE_VERSION_1;
}
if (INT_GET(dinoc->di_mode, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_mode = 0;
}
if (INT_GET(dinoc->di_flags, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_flags = 0;
}
if (INT_GET(dinoc->di_dmevmask, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_dmevmask = 0;
}
if (dinoc->di_forkoff != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_forkoff = 0;
}
if (dinoc->di_format != XFS_DINODE_FMT_EXTENTS) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_format = XFS_DINODE_FMT_EXTENTS;
}
if (dinoc->di_aformat != XFS_DINODE_FMT_EXTENTS) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_aformat = XFS_DINODE_FMT_EXTENTS;
}
if (INT_GET(dinoc->di_size, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_size = 0;
}
if (INT_GET(dinoc->di_nblocks, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_nblocks = 0;
}
if (INT_GET(dinoc->di_onlink, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_onlink = 0;
}
if (INT_GET(dinoc->di_nextents, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_nextents = 0;
}
if (INT_GET(dinoc->di_anextents, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_anextents = 0;
}
if (dinoc->di_version > XFS_DINODE_VERSION_1 &&
INT_GET(dinoc->di_nlink, ARCH_CONVERT) != 0) {
dirty = 1;
if (no_modify)
return(1);
dinoc->di_nlink = 0;
}
return(dirty);
}
/* ARGSUSED */
int
clear_dinode_unlinked(xfs_mount_t *mp, xfs_dinode_t *dino)
{
if (dino->di_next_unlinked != NULLAGINO) {
if (!no_modify)
dino->di_next_unlinked = NULLAGINO;
return(1);
}
return(0);
}
/*
* this clears the unlinked list too so it should not be called
* until after the agi unlinked lists are walked in phase 3.
* returns > zero if the inode has been altered while being cleared
*/
int
clear_dinode(xfs_mount_t *mp, xfs_dinode_t *dino, xfs_ino_t ino_num)
{
int dirty;
dirty = clear_dinode_core(&dino->di_core, ino_num);
dirty += clear_dinode_unlinked(mp, dino);
/* and clear the forks */
if (dirty && !no_modify)
memset(&dino->di_u, 0, XFS_LITINO(mp));
return(dirty);
}
/*
* misc. inode-related utility routines
*/
/*
* verify_ag_bno is heavily used. In the common case, it
* performs just two number of compares
*/
static __inline int
verify_ag_bno(xfs_sb_t *sbp,
xfs_agnumber_t agno,
xfs_agblock_t agbno)
{
if (agno < (sbp->sb_agcount - 1)) {
if (agbno >= sbp->sb_agblocks) {
return 1; /* bad */
}
return 0; /* good */
}
if (agno == (sbp->sb_agcount - 1)) {
if (agbno >=
(sbp->sb_dblocks -
(sbp->sb_agcount-1) *
sbp->sb_agblocks)) {
return 1; /* bad */
}
return 0; /* good */
}
return 1; /* bad */
}
/*
* returns 0 if inode number is valid, 1 if bogus
*/
int
verify_inum(xfs_mount_t *mp,
xfs_ino_t ino)
{
xfs_agnumber_t agno;
xfs_agino_t agino;
xfs_agblock_t agbno;
xfs_sb_t *sbp = &mp->m_sb;;
/* range check ag #, ag block. range-checking offset is pointless */
agno = XFS_INO_TO_AGNO(mp, ino);
agino = XFS_INO_TO_AGINO(mp, ino);
agbno = XFS_AGINO_TO_AGBNO(mp, agino);
if (agbno == 0)
return 1;
if (ino == 0 || ino == NULLFSINO)
return(1);
if (ino != XFS_AGINO_TO_INO(mp, agno, agino))
return(1);
return verify_ag_bno(sbp, agno, agbno);
}
/*
* have a separate routine to ensure that we don't accidentally
* lose illegally set bits in the agino by turning it into an FSINO
* to feed to the above routine
*/
int
verify_aginum(xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t agino)
{
xfs_agblock_t agbno;
xfs_sb_t *sbp = &mp->m_sb;;
/* range check ag #, ag block. range-checking offset is pointless */
if (agino == 0 || agino == NULLAGINO)
return(1);
/*
* agino's can't be too close to NULLAGINO because the min blocksize
* is 9 bits and at most 1 bit of that gets used for the inode offset
* so if the agino gets shifted by the # of offset bits and compared
* to the legal agbno values, a bogus agino will be too large. there
* will be extra bits set at the top that shouldn't be set.
*/
agbno = XFS_AGINO_TO_AGBNO(mp, agino);
if (agbno == 0)
return 1;
return verify_ag_bno(sbp, agno, agbno);
}
/*
* return 1 if block number is good, 0 if out of range
*/
int
verify_dfsbno(xfs_mount_t *mp,
xfs_dfsbno_t fsbno)
{
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_sb_t *sbp = &mp->m_sb;;
/* range check ag #, ag block. range-checking offset is pointless */
agno = XFS_FSB_TO_AGNO(mp, fsbno);
agbno = XFS_FSB_TO_AGBNO(mp, fsbno);
return verify_ag_bno(sbp, agno, agbno) == 0;
}
#define XR_DFSBNORANGE_VALID 0
#define XR_DFSBNORANGE_BADSTART 1
#define XR_DFSBNORANGE_BADEND 2
#define XR_DFSBNORANGE_OVERFLOW 3
static __inline int
verify_dfsbno_range(xfs_mount_t *mp,
xfs_dfsbno_t fsbno,
xfs_dfilblks_t count)
{
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_sb_t *sbp = &mp->m_sb;;
/* the start and end blocks better be in the same allocation group */
agno = XFS_FSB_TO_AGNO(mp, fsbno);
if (agno != XFS_FSB_TO_AGNO(mp, fsbno + count - 1)) {
return XR_DFSBNORANGE_OVERFLOW;
}
agbno = XFS_FSB_TO_AGBNO(mp, fsbno);
if (verify_ag_bno(sbp, agno, agbno)) {
return XR_DFSBNORANGE_BADSTART;
}
agbno = XFS_FSB_TO_AGBNO(mp, fsbno + count - 1);
if (verify_ag_bno(sbp, agno, agbno)) {
return XR_DFSBNORANGE_BADEND;
}
return (XR_DFSBNORANGE_VALID);
}
int
verify_agbno(xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agblock_t agbno)
{
xfs_sb_t *sbp = &mp->m_sb;;
/* range check ag #, ag block. range-checking offset is pointless */
return verify_ag_bno(sbp, agno, agbno) == 0;
}
/*
* return address of block fblock if it's within the range described
* by the extent list. Otherwise, returns a null address.
*/
/* ARGSUSED */
xfs_dfsbno_t
get_bmbt_reclist(
xfs_mount_t *mp,
xfs_bmbt_rec_t *rp,
int numrecs,
xfs_dfiloff_t fblock)
{
int i;
xfs_bmbt_irec_t irec;
for (i = 0; i < numrecs; i++, rp++) {
libxfs_bmbt_disk_get_all(rp, &irec);
if (irec.br_startoff >= fblock &&
irec.br_startoff + irec.br_blockcount < fblock)
return (irec.br_startblock + fblock - irec.br_startoff);
}
return(NULLDFSBNO);
}
static int
process_rt_rec(
xfs_mount_t *mp,
xfs_bmbt_irec_t *irec,
xfs_ino_t ino,
xfs_drfsbno_t *tot,
int check_dups)
{
xfs_dfsbno_t b;
xfs_drtbno_t ext;
int state;
int pwe; /* partially-written extent */
/*
* check numeric validity of the extent
*/
if (irec->br_startblock >= mp->m_sb.sb_rblocks) {
do_warn(_("inode %llu - bad rt extent start block number "
"%llu, offset %llu\n"), ino,
irec->br_startblock, irec->br_startoff);
return 1;
}
if (irec->br_startblock + irec->br_blockcount - 1 >= mp->m_sb.sb_rblocks) {
do_warn(_("inode %llu - bad rt extent last block number %llu, "
"offset %llu\n"), ino, irec->br_startblock +
irec->br_blockcount - 1, irec->br_startoff);
return 1;
}
if (irec->br_startblock + irec->br_blockcount - 1 < irec->br_startblock) {
do_warn(_("inode %llu - bad rt extent overflows - start %llu, "
"end %llu, offset %llu\n"), ino,
irec->br_startblock, irec->br_startblock +
irec->br_blockcount - 1, irec->br_startoff);
return 1;
}
/*
* verify that the blocks listed in the record
* are multiples of an extent
*/
if (XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) == 0 &&
(irec->br_startblock % mp->m_sb.sb_rextsize != 0 ||
irec->br_blockcount % mp->m_sb.sb_rextsize != 0)) {
do_warn(_("malformed rt inode extent [%llu %llu] (fs rtext "
"size = %u)\n"), irec->br_startblock,
irec->br_blockcount, mp->m_sb.sb_rextsize);
return 1;
}
/*
* set the appropriate number of extents
*/
for (b = irec->br_startblock; b < irec->br_startblock +
irec->br_blockcount; b += mp->m_sb.sb_rextsize) {
ext = (xfs_drtbno_t) b / mp->m_sb.sb_rextsize;
pwe = XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb) &&
irec->br_state == XFS_EXT_UNWRITTEN &&
(b % mp->m_sb.sb_rextsize != 0);
if (check_dups == 1) {
if (search_rt_dup_extent(mp, ext) && !pwe) {
do_warn(_("data fork in rt ino %llu claims "
"dup rt extent, off - %llu, "
"start - %llu, count %llu\n"),
ino, irec->br_startoff,
irec->br_startblock,
irec->br_blockcount);
return 1;
}
continue;
}
state = get_rtbno_state(mp, ext);
switch (state) {
case XR_E_FREE:
case XR_E_UNKNOWN:
set_rtbno_state(mp, ext, XR_E_INUSE);
break;
case XR_E_BAD_STATE:
do_error(_("bad state in rt block map %llu\n"),
ext);
case XR_E_FS_MAP:
case XR_E_INO:
case XR_E_INUSE_FS:
do_error(_("data fork in rt inode %llu found "
"metadata block %llu in rt bmap\n"),
ino, ext);
case XR_E_INUSE:
if (pwe)
break;
case XR_E_MULT:
set_rtbno_state(mp, ext, XR_E_MULT);
do_warn(_("data fork in rt inode %llu claims "
"used rt block %llu\n"),
ino, ext);
return 1;
case XR_E_FREE1:
default:
do_error(_("illegal state %d in rt block map "
"%llu\n"), state, b);
}
}
/*
* bump up the block counter
*/
*tot += irec->br_blockcount;
return 0;
}
/*
* return 1 if inode should be cleared, 0 otherwise
* if check_dups should be set to 1, that implies that
* the primary purpose of this call is to see if the
* file overlaps with any duplicate extents (in the
* duplicate extent list).
*/
/* ARGSUSED */
int
process_bmbt_reclist_int(
xfs_mount_t *mp,
xfs_bmbt_rec_t *rp,
int numrecs,
int type,
xfs_ino_t ino,
xfs_drfsbno_t *tot,
blkmap_t **blkmapp,
xfs_dfiloff_t *first_key,
xfs_dfiloff_t *last_key,
int check_dups,
int whichfork)
{
xfs_bmbt_irec_t irec;
xfs_dfilblks_t cp = 0; /* prev count */
xfs_dfsbno_t sp = 0; /* prev start */
xfs_dfiloff_t op = 0; /* prev offset */
xfs_dfsbno_t b;
char *ftype;
char *forkname;
int i;
int state;
xfs_dfsbno_t e;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_agnumber_t locked_agno = -1;
int error = 1;
if (whichfork == XFS_DATA_FORK)
forkname = _("data");
else
forkname = _("attr");
if (type == XR_INO_RTDATA)
ftype = _("real-time");
else
ftype = _("regular");
for (i = 0; i < numrecs; i++, rp++) {
libxfs_bmbt_disk_get_all(rp, &irec);
if (i == 0)
*last_key = *first_key = irec.br_startoff;
else
*last_key = irec.br_startoff;
if (i > 0 && op + cp > irec.br_startoff) {
do_warn(_("bmap rec out of order, inode %llu entry %d "
"[o s c] [%llu %llu %llu], %d [%llu %llu %llu]\n"),
ino, i, irec.br_startoff, irec.br_startblock,
irec.br_blockcount, i - 1, op, sp, cp);
goto done;
}
op = irec.br_startoff;
cp = irec.br_blockcount;
sp = irec.br_startblock;
/*
* check numeric validity of the extent
*/
if (irec.br_blockcount == 0) {
do_warn(_("zero length extent (off = %llu, fsbno = "
"%llu) in ino %llu\n"), irec.br_startoff,
irec.br_startblock, ino);
goto done;
}
if (type == XR_INO_RTDATA && whichfork == XFS_DATA_FORK) {
/*
* realtime bitmaps don't use AG locks, so returning
* immediately is fine for this code path.
*/
if (process_rt_rec(mp, &irec, ino, tot, check_dups))
return 1;
/*
* skip rest of loop processing since that'irec.br_startblock
* all for regular file forks and attr forks
*/
continue;
}
/*
* regular file data fork or attribute fork
*/
switch (verify_dfsbno_range(mp, irec.br_startblock,
irec.br_blockcount)) {
case XR_DFSBNORANGE_VALID:
break;
case XR_DFSBNORANGE_BADSTART:
do_warn(_("inode %llu - bad extent starting "
"block number %llu, offset %llu\n"),
ino, irec.br_startblock,
irec.br_startoff);
goto done;
case XR_DFSBNORANGE_BADEND:
do_warn(_("inode %llu - bad extent last block "
"number %llu, offset %llu\n"), ino,
irec.br_startblock + irec.br_blockcount
- 1, irec.br_startoff);
goto done;
case XR_DFSBNORANGE_OVERFLOW:
do_warn(_("inode %llu - bad extent overflows - "
"start %llu, end %llu, offset %llu\n"),
ino, irec.br_startblock,
irec.br_startblock + irec.br_blockcount
- 1, irec.br_startoff);
goto done;
}
if (irec.br_startoff >= fs_max_file_offset) {
do_warn(_("inode %llu - extent offset too large - "
"start %llu, count %llu, offset %llu\n"),
ino, irec.br_startblock, irec.br_blockcount,
irec.br_startoff);
goto done;
}
if (blkmapp && *blkmapp)
blkmap_set_ext(blkmapp, irec.br_startoff,
irec.br_startblock, irec.br_blockcount);
/*
* Profiling shows that the following loop takes the
* most time in all of xfs_repair.
*/
agno = XFS_FSB_TO_AGNO(mp, irec.br_startblock);
agbno = XFS_FSB_TO_AGBNO(mp, irec.br_startblock);
e = irec.br_startblock + irec.br_blockcount;
if (agno != locked_agno) {
if (locked_agno != -1)
pthread_mutex_unlock(&ag_locks[locked_agno]);
pthread_mutex_lock(&ag_locks[agno]);
locked_agno = agno;
}
if (check_dups) {
/*
* if we're just checking the bmap for dups,
* return if we find one, otherwise, continue
* checking each entry without setting the
* block bitmap
*/
for (b = irec.br_startblock; b < e; b++, agbno++) {
if (search_dup_extent(mp, agno, agbno)) {
do_warn(_("%s fork in ino %llu claims "
"dup extent, off - %llu, "
"start - %llu, cnt %llu\n"),
forkname, ino, irec.br_startoff,
irec.br_startblock,
irec.br_blockcount);
goto done;
}
}
*tot += irec.br_blockcount;
continue;
}
for (b = irec.br_startblock; b < e; b++, agbno++) {
/*
* Process in chunks of 16 (XR_BB_UNIT/XR_BB)
* for common XR_E_UNKNOWN to XR_E_INUSE transition
*/
if (((agbno & XR_BB_MASK) == 0) && ((irec.br_startblock + irec.br_blockcount - b) >= (XR_BB_UNIT/XR_BB))) {
if (ba_bmap[agno][agbno>>XR_BB] == XR_E_UNKNOWN_LL) {
ba_bmap[agno][agbno>>XR_BB] = XR_E_INUSE_LL;
agbno += (XR_BB_UNIT/XR_BB) - 1;
b += (XR_BB_UNIT/XR_BB) - 1;
continue;
}
}
state = get_agbno_state(mp, agno, agbno);
switch (state) {
case XR_E_FREE:
case XR_E_FREE1:
do_warn(_("%s fork in ino %llu claims free "
"block %llu\n"),
forkname, ino, (__uint64_t) b);
/* fall through ... */
case XR_E_UNKNOWN:
set_agbno_state(mp, agno, agbno, XR_E_INUSE);
break;
case XR_E_BAD_STATE:
do_error(_("bad state in block map %llu\n"), b);
case XR_E_FS_MAP:
case XR_E_INO:
case XR_E_INUSE_FS:
do_warn(_("%s fork in inode %llu claims "
"metadata block %llu\n"),
forkname, ino, (__uint64_t) b);
goto done;
case XR_E_INUSE:
case XR_E_MULT:
set_agbno_state(mp, agno, agbno, XR_E_MULT);
do_warn(_("%s fork in %s inode %llu claims "
"used block %llu\n"),
forkname, ftype, ino, (__uint64_t) b);
goto done;
default:
do_error(_("illegal state %d in block map %llu\n"),
state, b);
}
}
*tot += irec.br_blockcount;
}
error = 0;
done:
if (locked_agno != -1)
pthread_mutex_unlock(&ag_locks[locked_agno]);
return error;
}
/*
* return 1 if inode should be cleared, 0 otherwise, sets block bitmap
* as a side-effect
*/
int
process_bmbt_reclist(
xfs_mount_t *mp,
xfs_bmbt_rec_32_t *rp,
int numrecs,
int type,
xfs_ino_t ino,
xfs_drfsbno_t *tot,
blkmap_t **blkmapp,
xfs_dfiloff_t *first_key,
xfs_dfiloff_t *last_key,
int whichfork)
{
return(process_bmbt_reclist_int(mp, (xfs_bmbt_rec_t *)rp, numrecs, type,
ino, tot, blkmapp, first_key, last_key,
0, whichfork));
}
/*
* return 1 if inode should be cleared, 0 otherwise, does not set
* block bitmap
*/
int
scan_bmbt_reclist(
xfs_mount_t *mp,
xfs_bmbt_rec_32_t *rp,
int numrecs,
int type,
xfs_ino_t ino,
xfs_drfsbno_t *tot,
int whichfork)
{
xfs_dfiloff_t first_key = 0;
xfs_dfiloff_t last_key = 0;
return(process_bmbt_reclist_int(mp, (xfs_bmbt_rec_t *)rp, numrecs, type,
ino, tot, NULL, &first_key, &last_key,
1, whichfork));
}
/*
* these two are meant for routines that read and work with inodes
* one at a time where the inodes may be in any order (like walking
* the unlinked lists to look for inodes). the caller is responsible
* for writing/releasing the buffer.
*/
xfs_buf_t *
get_agino_buf(xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t agino,
xfs_dinode_t **dipp)
{
ino_tree_node_t *irec;
xfs_buf_t *bp;
int size;
if ((irec = find_inode_rec(agno, agino)) == NULL)
return(NULL);
size = XFS_FSB_TO_BB(mp, MAX(1, XFS_INODES_PER_CHUNK/inodes_per_block));
bp = libxfs_readbuf(mp->m_dev, XFS_AGB_TO_DADDR(mp, agno,
XFS_AGINO_TO_AGBNO(mp, irec->ino_startnum)), size, 0);
if (!bp) {
do_warn(_("cannot read inode (%u/%u), disk block %lld\n"),
agno, irec->ino_startnum,
XFS_AGB_TO_DADDR(mp, agno,
XFS_AGINO_TO_AGBNO(mp, irec->ino_startnum)));
return(NULL);
}
*dipp = XFS_MAKE_IPTR(mp, bp, agino -
XFS_OFFBNO_TO_AGINO(mp, XFS_AGINO_TO_AGBNO(mp,
irec->ino_startnum),
0));
return(bp);
}
/*
* these next routines return the filesystem blockno of the
* block containing the block "bno" in the file whose bmap
* tree (or extent list) is rooted by "rootblock".
*
* the next routines are utility routines for the third
* routine, get_bmapi().
*/
/* ARGSUSED */
xfs_dfsbno_t
getfunc_extlist(xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dip,
xfs_dfiloff_t bno,
int whichfork)
{
xfs_bmbt_irec_t irec;
xfs_dfsbno_t final_fsbno = NULLDFSBNO;
xfs_bmbt_rec_t *rootblock = (xfs_bmbt_rec_t *)
XFS_DFORK_PTR(dip, whichfork);
xfs_extnum_t nextents = XFS_DFORK_NEXTENTS(dip, whichfork);
int i;
for (i = 0; i < nextents; i++) {
libxfs_bmbt_disk_get_all(rootblock + i, &irec);
if (irec.br_startoff <= bno &&
bno < irec.br_startoff + irec.br_blockcount) {
final_fsbno = bno - irec.br_startoff + irec.br_startblock;
break;
}
}
return(final_fsbno);
}
xfs_dfsbno_t
getfunc_btree(xfs_mount_t *mp,
xfs_ino_t ino,
xfs_dinode_t *dip,
xfs_dfiloff_t bno,
int whichfork)
{
int i;
#ifdef DEBUG
int prev_level;
#endif
int found;
xfs_bmbt_rec_t *rec;
xfs_bmbt_irec_t irec;
xfs_bmbt_ptr_t *pp;
xfs_bmbt_key_t *key;
xfs_bmdr_key_t *rkey;
xfs_bmdr_ptr_t *rp;
xfs_dfsbno_t fsbno;
xfs_buf_t *bp;
xfs_dfsbno_t final_fsbno = NULLDFSBNO;
xfs_bmbt_block_t *block;
xfs_bmdr_block_t *rootblock = (xfs_bmdr_block_t *)
XFS_DFORK_PTR(dip, whichfork);
ASSERT(rootblock->bb_level != 0);
/*
* deal with root block, it's got a slightly different
* header structure than interior nodes. We know that
* a btree should have at least 2 levels otherwise it
* would be an extent list.
*/
rkey = XFS_BTREE_KEY_ADDR(
XFS_DFORK_SIZE(dip, mp, whichfork),
xfs_bmdr, rootblock, 1,
XFS_BTREE_BLOCK_MAXRECS(XFS_DFORK_SIZE(dip,
mp, whichfork),
xfs_bmdr, 1));
rp = XFS_BTREE_PTR_ADDR(
XFS_DFORK_SIZE(dip, mp, whichfork),
xfs_bmdr, rootblock, 1,
XFS_BTREE_BLOCK_MAXRECS(XFS_DFORK_SIZE(dip,
mp, whichfork),
xfs_bmdr, 1));
for (found = -1, i = 0; i < rootblock->bb_numrecs - 1; i++) {
if (rkey[i].br_startoff <= bno
&& bno < rkey[i+1].br_startoff) {
found = i;
break;
}
}
if (i == rootblock->bb_numrecs - 1 && bno >= rkey[i].br_startoff)
found = i;
ASSERT(found != -1);
fsbno = INT_GET(rp[found], ARCH_CONVERT);
ASSERT(verify_dfsbno(mp, fsbno));
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, fsbno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
do_error(_("cannot read bmap block %llu\n"), fsbno);
return(NULLDFSBNO);
}
block = XFS_BUF_TO_BMBT_BLOCK(bp);
/*
* ok, now traverse any interior btree nodes
*/
#ifdef DEBUG
prev_level = INT_GET(block->bb_level, ARCH_CONVERT);
#endif
while (INT_GET(block->bb_level, ARCH_CONVERT) > 0) {
#ifdef DEBUG
ASSERT(INT_GET(block->bb_level, ARCH_CONVERT) < prev_level);
prev_level = INT_GET(block->bb_level, ARCH_CONVERT);
#endif
if (INT_GET(block->bb_numrecs, ARCH_CONVERT) >
mp->m_bmap_dmxr[1]) {
do_warn(_("# of bmap records in inode %llu exceeds max "
"(%u, max - %u)\n"),
ino, INT_GET(block->bb_numrecs, ARCH_CONVERT),
mp->m_bmap_dmxr[1]);
libxfs_putbuf(bp);
return(NULLDFSBNO);
}
if (verbose && INT_GET(block->bb_numrecs, ARCH_CONVERT) <
mp->m_bmap_dmnr[1]) {
do_warn(_("- # of bmap records in inode %llu less than "
"minimum (%u, min - %u), proceeding ...\n"),
ino, INT_GET(block->bb_numrecs, ARCH_CONVERT),
mp->m_bmap_dmnr[1]);
}
key = XFS_BTREE_KEY_ADDR(mp->m_sb.sb_blocksize,
xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]);
pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize,
xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]);
for ( found = -1, i = 0;
i < INT_GET(block->bb_numrecs, ARCH_CONVERT) - 1;
i++) {
if (INT_GET(key[i].br_startoff, ARCH_CONVERT) <= bno &&
bno < INT_GET(key[i+1].br_startoff, ARCH_CONVERT)) {
found = i;
break;
}
}
if (i == INT_GET(block->bb_numrecs, ARCH_CONVERT) - 1 &&
bno >= INT_GET(key[i].br_startoff, ARCH_CONVERT))
found = i;
ASSERT(found != -1);
fsbno = INT_GET(pp[found], ARCH_CONVERT);
ASSERT(verify_dfsbno(mp, fsbno));
/*
* release current btree block and read in the
* next btree block to be traversed
*/
libxfs_putbuf(bp);
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, fsbno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp) {
do_error(_("cannot read bmap block %llu\n"), fsbno);
return(NULLDFSBNO);
}
block = XFS_BUF_TO_BMBT_BLOCK(bp);
}
/*
* current block must be a leaf block
*/
ASSERT(INT_GET(block->bb_level, ARCH_CONVERT) == 0);
if (INT_GET(block->bb_numrecs, ARCH_CONVERT) > mp->m_bmap_dmxr[0]) {
do_warn(_("# of bmap records in inode %llu greater than "
"maximum (%u, max - %u)\n"),
ino, INT_GET(block->bb_numrecs, ARCH_CONVERT),
mp->m_bmap_dmxr[0]);
libxfs_putbuf(bp);
return(NULLDFSBNO);
}
if (verbose && INT_GET(block->bb_numrecs, ARCH_CONVERT) <
mp->m_bmap_dmnr[0])
do_warn(_("- # of bmap records in inode %llu less than minimum "
"(%u, min - %u), continuing...\n"),
ino, INT_GET(block->bb_numrecs, ARCH_CONVERT),
mp->m_bmap_dmnr[0]);
rec = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, block, 1,
mp->m_bmap_dmxr[0]);
for (i = 0; i < INT_GET(block->bb_numrecs, ARCH_CONVERT); i++) {
libxfs_bmbt_disk_get_all(rec + i, &irec);
if (irec.br_startoff <= bno &&
bno < irec.br_startoff + irec.br_blockcount) {
final_fsbno = bno - irec.br_startoff + irec.br_startblock;
break;
}
}
libxfs_putbuf(bp);
if (final_fsbno == NULLDFSBNO)
do_warn(_("could not map block %llu\n"), bno);
return(final_fsbno);
}
/*
* this could be smarter. maybe we should have an open inode
* routine that would get the inode buffer and return back
* an inode handle. I'm betting for the moment that this
* is used only by the directory and attribute checking code
* and that the avl tree find and buffer cache search are
* relatively cheap. If they're too expensive, we'll just
* have to fix this and add an inode handle to the da btree
* cursor.
*
* caller is responsible for checking doubly referenced blocks
* and references to holes
*/
xfs_dfsbno_t
get_bmapi(xfs_mount_t *mp, xfs_dinode_t *dino_p,
xfs_ino_t ino_num, xfs_dfiloff_t bno, int whichfork)
{
xfs_dfsbno_t fsbno;
switch (XFS_DFORK_FORMAT(dino_p, whichfork)) {
case XFS_DINODE_FMT_EXTENTS:
fsbno = getfunc_extlist(mp, ino_num, dino_p, bno, whichfork);
break;
case XFS_DINODE_FMT_BTREE:
fsbno = getfunc_btree(mp, ino_num, dino_p, bno, whichfork);
break;
case XFS_DINODE_FMT_LOCAL:
do_error(_("get_bmapi() called for local inode %llu\n"),
ino_num);
fsbno = NULLDFSBNO;
break;
default:
/*
* shouldn't happen
*/
do_error(_("bad inode format for inode %llu\n"), ino_num);
fsbno = NULLDFSBNO;
}
return(fsbno);
}
/*
* higher level inode processing stuff starts here:
* first, one utility routine for each type of inode
*/
/*
* return 1 if inode should be cleared, 0 otherwise
*/
/* ARGSUSED */
int
process_btinode(
xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t ino,
xfs_dinode_t *dip,
int type,
int *dirty,
xfs_drfsbno_t *tot,
__uint64_t *nex,
blkmap_t **blkmapp,
int whichfork,
int check_dups)
{
xfs_bmdr_block_t *dib;
xfs_dfiloff_t last_key;
xfs_dfiloff_t first_key = 0;
xfs_ino_t lino;
xfs_bmbt_ptr_t *pp;
xfs_bmbt_key_t *pkey;
char *forkname;
int i;
int level;
int numrecs;
bmap_cursor_t cursor;
dib = (xfs_bmdr_block_t *)XFS_DFORK_PTR(dip, whichfork);
lino = XFS_AGINO_TO_INO(mp, agno, ino);
*tot = 0;
*nex = 0;
if (whichfork == XFS_DATA_FORK)
forkname = _("data");
else
forkname = _("attr");
level = INT_GET(dib->bb_level, ARCH_CONVERT);
numrecs = INT_GET(dib->bb_numrecs, ARCH_CONVERT);
if ((level == 0) || (level > XFS_BM_MAXLEVELS(mp, whichfork))) {
/*
* XXX - if we were going to fix up the inode,
* we'd try to treat the fork as an interior
* node and see if we could get an accurate
* level value from one of the blocks pointed
* to by the pointers in the fork. For now
* though, we just bail (and blow out the inode).
*/
do_warn(_("bad level %d in inode %llu bmap btree root block\n"),
level, XFS_AGINO_TO_INO(mp, agno, ino));
return(1);
}
if (numrecs == 0) {
do_warn(_("bad numrecs 0 in inode %llu bmap btree root block\n"),
XFS_AGINO_TO_INO(mp, agno, ino));
return(1);
}
/*
* use bmdr/dfork_dsize since the root block is in the data fork
*/
if (XFS_BMDR_SPACE_CALC(numrecs) > ((whichfork == XFS_DATA_FORK) ?
XFS_DFORK_DSIZE(dip, mp) :
XFS_DFORK_ASIZE(dip, mp))) {
do_warn(
_("indicated size of %s btree root (%d bytes) greater than space in "
"inode %llu %s fork\n"),
forkname, XFS_BMDR_SPACE_CALC(numrecs), lino, forkname);
return(1);
}
init_bm_cursor(&cursor, level + 1);
pp = XFS_BTREE_PTR_ADDR(
XFS_DFORK_SIZE(dip, mp, whichfork),
xfs_bmdr, dib, 1,
XFS_BTREE_BLOCK_MAXRECS(
XFS_DFORK_SIZE(dip, mp, whichfork),
xfs_bmdr, 0));
pkey = XFS_BTREE_KEY_ADDR(
XFS_DFORK_SIZE(dip, mp, whichfork),
xfs_bmdr, dib, 1,
XFS_BTREE_BLOCK_MAXRECS(
XFS_DFORK_SIZE(dip, mp, whichfork),
xfs_bmdr, 0));
last_key = NULLDFILOFF;
for (i = 0; i < numrecs; i++) {
/*
* XXX - if we were going to do more to fix up the inode
* btree, we'd do it right here. For now, if there's a
* problem, we'll bail out and presumably clear the inode.
*/
if (!verify_dfsbno(mp, INT_GET(pp[i], ARCH_CONVERT))) {
do_warn(_("bad bmap btree ptr 0x%llx in ino %llu\n"),
INT_GET(pp[i], ARCH_CONVERT), lino);
return(1);
}
if (scan_lbtree((xfs_dfsbno_t)INT_GET(pp[i], ARCH_CONVERT),
level, scanfunc_bmap, type, whichfork,
lino, tot, nex, blkmapp, &cursor,
1, check_dups))
return(1);
/*
* fix key (offset) mismatches between the keys in root
* block records and the first key of each child block.
* fixes cases where entries have been shifted between
* blocks but the parent hasn't been updated
*/
if (check_dups == 0 &&
cursor.level[level-1].first_key !=
INT_GET(pkey[i].br_startoff, ARCH_CONVERT)) {
if (!no_modify) {
do_warn(
_("correcting key in bmbt root (was %llu, now %llu) in inode "
"%llu %s fork\n"),
INT_GET(pkey[i].br_startoff,
ARCH_CONVERT),
cursor.level[level-1].first_key,
XFS_AGINO_TO_INO(mp, agno, ino),
forkname);
*dirty = 1;
INT_SET(pkey[i].br_startoff, ARCH_CONVERT,
cursor.level[level-1].first_key);
} else {
do_warn(
_("bad key in bmbt root (is %llu, would reset to %llu) in inode "
"%llu %s fork\n"),
INT_GET(pkey[i].br_startoff,
ARCH_CONVERT),
cursor.level[level-1].first_key,
XFS_AGINO_TO_INO(mp, agno, ino),
forkname);
}
}
/*
* make sure that keys are in ascending order. blow out
* inode if the ordering doesn't hold
*/
if (check_dups == 0) {
if (last_key != NULLDFILOFF && last_key >=
cursor.level[level-1].first_key) {
do_warn(
_("out of order bmbt root key %llu in inode %llu %s fork\n"),
first_key,
XFS_AGINO_TO_INO(mp, agno, ino),
forkname);
return(1);
}
last_key = cursor.level[level-1].first_key;
}
}
/*
* Check that the last child block's forward sibling pointer
* is NULL.
*/
if (check_dups == 0 &&
cursor.level[0].right_fsbno != NULLDFSBNO) {
do_warn(
_("bad fwd (right) sibling pointer (saw %llu should be NULLDFSBNO)\n"),
cursor.level[0].right_fsbno);
do_warn(
_("\tin inode %u (%s fork) bmap btree block %llu\n"),
XFS_AGINO_TO_INO(mp, agno, ino), forkname,
cursor.level[0].fsbno);
return(1);
}
return(0);
}
/*
* return 1 if inode should be cleared, 0 otherwise
*/
/* ARGSUSED */
int
process_exinode(
xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t ino,
xfs_dinode_t *dip,
int type,
int *dirty,
xfs_drfsbno_t *tot,
__uint64_t *nex,
blkmap_t **blkmapp,
int whichfork,
int check_dups)
{
xfs_ino_t lino;
xfs_bmbt_rec_32_t *rp;
xfs_dfiloff_t first_key;
xfs_dfiloff_t last_key;
lino = XFS_AGINO_TO_INO(mp, agno, ino);
rp = (xfs_bmbt_rec_32_t *)XFS_DFORK_PTR(dip, whichfork);
*tot = 0;
*nex = XFS_DFORK_NEXTENTS(dip, whichfork);
/*
* XXX - if we were going to fix up the btree record,
* we'd do it right here. For now, if there's a problem,
* we'll bail out and presumably clear the inode.
*/
if (check_dups == 0)
return(process_bmbt_reclist(mp, rp, *nex, type, lino,
tot, blkmapp, &first_key, &last_key,
whichfork));
else
return(scan_bmbt_reclist(mp, rp, *nex, type, lino, tot,
whichfork));
}
/*
* return 1 if inode should be cleared, 0 otherwise
*/
/* ARGSUSED */
int
process_lclinode(
xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t ino,
xfs_dinode_t *dip,
int type,
int *dirty,
xfs_drfsbno_t *tot,
__uint64_t *nex,
blkmap_t **blkmapp,
int whichfork,
int check_dups)
{
xfs_attr_shortform_t *asf;
xfs_dinode_core_t *dic;
xfs_ino_t lino;
*tot = 0;
*nex = 0; /* local inodes have 0 extents */
dic = &dip->di_core;
lino = XFS_AGINO_TO_INO(mp, agno, ino);
if (whichfork == XFS_DATA_FORK &&
INT_GET(dic->di_size, ARCH_CONVERT) >
XFS_DFORK_DSIZE(dip, mp)) {
do_warn(
_("local inode %llu data fork is too large (size = %lld, max = %d)\n"),
lino, INT_GET(dic->di_size, ARCH_CONVERT),
XFS_DFORK_DSIZE(dip, mp));
return(1);
} else if (whichfork == XFS_ATTR_FORK) {
asf = (xfs_attr_shortform_t *)
XFS_DFORK_APTR(dip);
if (INT_GET(asf->hdr.totsize, ARCH_CONVERT) >
XFS_DFORK_ASIZE(dip, mp)) {
do_warn(
_("local inode %llu attr fork too large (size %d, max = %d)\n"),
lino, INT_GET(asf->hdr.totsize, ARCH_CONVERT),
XFS_DFORK_ASIZE(dip, mp));
return(1);
}
if (INT_GET(asf->hdr.totsize, ARCH_CONVERT) <
sizeof(xfs_attr_sf_hdr_t)) {
do_warn(
_("local inode %llu attr too small (size = %d, min size = %d)\n"),
lino, INT_GET(asf->hdr.totsize, ARCH_CONVERT),
sizeof(xfs_attr_sf_hdr_t));
return(1);
}
}
return(0);
}
int
process_symlink_extlist(xfs_mount_t *mp, xfs_ino_t lino, xfs_dinode_t *dino)
{
xfs_dfiloff_t expected_offset;
xfs_bmbt_rec_t *rp;
xfs_bmbt_irec_t irec;
int numrecs;
int i;
int max_blocks;
int whichfork = XFS_DATA_FORK;
if (INT_GET(dino->di_core.di_size, ARCH_CONVERT) <=
XFS_DFORK_SIZE(dino, mp, whichfork)) {
if (dino->di_core.di_format == XFS_DINODE_FMT_LOCAL) {
return(0);
} else {
do_warn(
_("mismatch between format (%d) and size (%lld) in symlink ino %llu\n"),
dino->di_core.di_format,
INT_GET(dino->di_core.di_size, ARCH_CONVERT),
lino);
return(1);
}
} else if (dino->di_core.di_format == XFS_DINODE_FMT_LOCAL) {
do_warn(
_("mismatch between format (%d) and size (%lld) in symlink inode %llu\n"),
dino->di_core.di_format,
INT_GET(dino->di_core.di_size, ARCH_CONVERT),
lino);
return(1);
}
rp = (xfs_bmbt_rec_t *)XFS_DFORK_PTR(dino, whichfork);
numrecs = XFS_DFORK_NEXTENTS(dino, whichfork);
/*
* the max # of extents in a symlink inode is equal to the
* number of max # of blocks required to store the symlink
*/
if (numrecs > max_symlink_blocks) {
do_warn(
_("bad number of extents (%d) in symlink %llu data fork\n"),
numrecs, lino);
return(1);
}
max_blocks = max_symlink_blocks;
expected_offset = 0;
for (i = 0; numrecs > 0; i++, numrecs--) {
libxfs_bmbt_disk_get_all(rp, &irec);
if (irec.br_startoff != expected_offset) {
do_warn(
_("bad extent #%d offset (%llu) in symlink %llu data fork\n"),
i, irec.br_startoff, lino);
return(1);
}
if (irec.br_blockcount == 0 || irec.br_blockcount > max_blocks) {
do_warn(
_("bad extent #%d count (%llu) in symlink %llu data fork\n"),
i, irec.br_blockcount, lino);
return(1);
}
max_blocks -= irec.br_blockcount;
expected_offset += irec.br_blockcount;
}
return(0);
}
/*
* takes a name and length and returns 1 if the name contains
* a \0, returns 0 otherwise
*/
int
null_check(char *name, int length)
{
int i;
ASSERT(length < MAXPATHLEN);
for (i = 0; i < length; i++, name++) {
if (*name == '\0')
return(1);
}
return(0);
}
/*
* like usual, returns 0 if everything's ok and 1 if something's
* bogus
*/
int
process_symlink(
xfs_mount_t *mp,
xfs_ino_t lino,
xfs_dinode_t *dino,
blkmap_t *blkmap)
{
xfs_dfsbno_t fsbno;
xfs_dinode_core_t *dinoc = &dino->di_core;
xfs_buf_t *bp = NULL;
char *symlink, *cptr, *buf_data;
int i, size, amountdone;
char data[MAXPATHLEN];
/*
* check size against kernel symlink limits. we know
* size is consistent with inode storage format -- e.g.
* the inode is structurally ok so we don't have to check
* for that
*/
if (INT_GET(dinoc->di_size, ARCH_CONVERT) >= MAXPATHLEN) {
do_warn(_("symlink in inode %llu too long (%lld chars)\n"),
lino, INT_GET(dinoc->di_size, ARCH_CONVERT));
return(1);
}
/*
* have to check symlink component by component.
* get symlink contents into data area
*/
symlink = &data[0];
if (INT_GET(dinoc->di_size, ARCH_CONVERT)
<= XFS_DFORK_DSIZE(dino, mp)) {
/*
* local symlink, just copy the symlink out of the
* inode into the data area
*/
memmove(symlink, (char *)XFS_DFORK_DPTR(dino),
INT_GET(dinoc->di_size, ARCH_CONVERT));
} else {
/*
* stored in a meta-data file, have to bmap one block
* at a time and copy the symlink into the data area
*/
i = size = amountdone = 0;
cptr = symlink;
while (amountdone < INT_GET(dinoc->di_size, ARCH_CONVERT)) {
fsbno = blkmap_get(blkmap, i);
if (fsbno != NULLDFSBNO)
bp = libxfs_readbuf(mp->m_dev,
XFS_FSB_TO_DADDR(mp, fsbno),
XFS_FSB_TO_BB(mp, 1), 0);
if (!bp || fsbno == NULLDFSBNO) {
do_warn(
_("cannot read inode %llu, file block %d, disk block %llu\n"),
lino, i, fsbno);
return(1);
}
buf_data = (char *)XFS_BUF_PTR(bp);
size = MIN(INT_GET(dinoc->di_size, ARCH_CONVERT)
- amountdone, (int)XFS_FSB_TO_BB(mp, 1)*BBSIZE);
memmove(cptr, buf_data, size);
cptr += size;
amountdone += size;
i++;
libxfs_putbuf(bp);
}
}
data[INT_GET(dinoc->di_size, ARCH_CONVERT)] = '\0';
/*
* check for nulls
*/
if (null_check(symlink, (int) INT_GET(dinoc->di_size, ARCH_CONVERT))) {
do_warn(
_("found illegal null character in symlink inode %llu\n"),
lino);
return(1);
}
/*
* check for any component being too long
*/
if (INT_GET(dinoc->di_size, ARCH_CONVERT) >= MAXNAMELEN) {
cptr = strchr(symlink, '/');
while (cptr != NULL) {
if (cptr - symlink >= MAXNAMELEN) {
do_warn(
_("component of symlink in inode %llu too long\n"),
lino);
return(1);
}
symlink = cptr + 1;
cptr = strchr(symlink, '/');
}
if (strlen(symlink) >= MAXNAMELEN) {
do_warn(
_("component of symlink in inode %llu too long\n"),
lino);
return(1);
}
}
return(0);
}
/*
* called to process the set of misc inode special inode types
* that have no associated data storage (fifos, pipes, devices, etc.).
*/
static int
process_misc_ino_types(xfs_mount_t *mp,
xfs_dinode_t *dino,
xfs_ino_t lino,
int type)
{
/*
* disallow mountpoint inodes until such time as the
* kernel actually allows them to be created (will
* probably require a superblock version rev, sigh).
*/
if (type == XR_INO_MOUNTPOINT) {
do_warn(_("inode %llu has bad inode type (IFMNT)\n"), lino);
return(1);
}
/*
* must also have a zero size
*/
if (be64_to_cpu(dino->di_core.di_size) != 0) {
switch (type) {
case XR_INO_CHRDEV:
do_warn(_("size of character device inode %llu != 0 "
"(%lld bytes)\n"), lino,
be64_to_cpu(dino->di_core.di_size));
break;
case XR_INO_BLKDEV:
do_warn(_("size of block device inode %llu != 0 "
"(%lld bytes)\n"), lino,
be64_to_cpu(dino->di_core.di_size));
break;
case XR_INO_SOCK:
do_warn(_("size of socket inode %llu != 0 "
"(%lld bytes)\n"), lino,
be64_to_cpu(dino->di_core.di_size));
break;
case XR_INO_FIFO:
do_warn(_("size of fifo inode %llu != 0 "
"(%lld bytes)\n"), lino,
be64_to_cpu(dino->di_core.di_size));
break;
default:
do_warn(_("Internal error - process_misc_ino_types, "
"illegal type %d\n"), type);
abort();
}
return(1);
}
return(0);
}
static __inline int
process_misc_ino_types_blocks(xfs_drfsbno_t totblocks, xfs_ino_t lino, int type)
{
/*
* you can not enforce all misc types have zero data fork blocks
* by checking dino->di_core.di_nblocks because atotblocks (attribute
* blocks) are part of nblocks. We must check this later when atotblocks
* has been calculated or by doing a simple check that anExtents == 0.
* We must also guarantee that totblocks is 0. Thus nblocks checking
* will be done later in process_dinode_int for misc types.
*/
if (totblocks != 0) {
switch (type) {
case XR_INO_CHRDEV:
do_warn(
_("size of character device inode %llu != 0 (%llu blocks)\n"),
lino, totblocks);
break;
case XR_INO_BLKDEV:
do_warn(
_("size of block device inode %llu != 0 (%llu blocks)\n"),
lino, totblocks);
break;
case XR_INO_SOCK:
do_warn(
_("size of socket inode %llu != 0 (%llu blocks)\n"),
lino, totblocks);
break;
case XR_INO_FIFO:
do_warn(
_("size of fifo inode %llu != 0 (%llu blocks)\n"),
lino, totblocks);
break;
default:
return(0);
}
return(1);
}
return (0);
}
static inline int
dinode_fmt(
xfs_dinode_core_t *dinoc)
{
return be16_to_cpu(dinoc->di_mode) & S_IFMT;
}
static inline void
change_dinode_fmt(
xfs_dinode_core_t *dinoc,
int new_fmt)
{
int mode = be16_to_cpu(dinoc->di_mode);
ASSERT((new_fmt & ~S_IFMT) == 0);
mode &= ~S_IFMT;
mode |= new_fmt;
dinoc->di_mode = cpu_to_be16(mode);
}
static int
check_dinode_mode_format(
xfs_dinode_core_t *dinoc)
{
if ((uchar_t)dinoc->di_format >= XFS_DINODE_FMT_UUID)
return -1; /* FMT_UUID is not used */
switch (dinode_fmt(dinoc)) {
case S_IFIFO:
case S_IFCHR:
case S_IFBLK:
case S_IFSOCK:
return (dinoc->di_format != XFS_DINODE_FMT_DEV) ? -1 : 0;
case S_IFDIR:
return (dinoc->di_format < XFS_DINODE_FMT_LOCAL ||
dinoc->di_format > XFS_DINODE_FMT_BTREE) ? -1 : 0;
case S_IFREG:
return (dinoc->di_format < XFS_DINODE_FMT_EXTENTS ||
dinoc->di_format > XFS_DINODE_FMT_BTREE) ? -1 : 0;
case S_IFLNK:
return (dinoc->di_format < XFS_DINODE_FMT_LOCAL ||
dinoc->di_format > XFS_DINODE_FMT_EXTENTS) ? -1 : 0;
default: ;
}
return 0; /* invalid modes are checked elsewhere */
}
/*
* If inode is a superblock inode, does type check to make sure is it valid.
* Returns 0 if it's valid, non-zero if it needs to be cleared.
*/
static int
process_check_sb_inodes(
xfs_mount_t *mp,
xfs_dinode_core_t *dinoc,
xfs_ino_t lino,
int *type,
int *dirty)
{
if (lino == mp->m_sb.sb_rootino) {
if (*type != XR_INO_DIR) {
do_warn(_("root inode %llu has bad type 0x%x\n"),
lino, dinode_fmt(dinoc));
*type = XR_INO_DIR;
if (!no_modify) {
do_warn(_("resetting to directory\n"));
change_dinode_fmt(dinoc, S_IFDIR);
*dirty = 1;
} else
do_warn(_("would reset to directory\n"));
}
return 0;
}
if (lino == mp->m_sb.sb_uquotino) {
if (*type != XR_INO_DATA) {
do_warn(_("user quota inode %llu has bad type 0x%x\n"),
lino, dinode_fmt(dinoc));
mp->m_sb.sb_uquotino = NULLFSINO;
return 1;
}
return 0;
}
if (lino == mp->m_sb.sb_gquotino) {
if (*type != XR_INO_DATA) {
do_warn(_("group quota inode %llu has bad type 0x%x\n"),
lino, dinode_fmt(dinoc));
mp->m_sb.sb_gquotino = NULLFSINO;
return 1;
}
return 0;
}
if (lino == mp->m_sb.sb_rsumino) {
if (*type != XR_INO_RTSUM) {
do_warn(_("realtime summary inode %llu has bad type 0x%x, "),
lino, dinode_fmt(dinoc));
if (!no_modify) {
do_warn(_("resetting to regular file\n"));
change_dinode_fmt(dinoc, S_IFREG);
*dirty = 1;
} else {
do_warn(_("would reset to regular file\n"));
}
}
if (mp->m_sb.sb_rblocks == 0 && dinoc->di_nextents != 0) {
do_warn(_("bad # of extents (%u) for realtime summary inode %llu\n"),
be32_to_cpu(dinoc->di_nextents), lino);
return 1;
}
return 0;
}
if (lino == mp->m_sb.sb_rbmino) {
if (*type != XR_INO_RTBITMAP) {
do_warn(_("realtime bitmap inode %llu has bad type 0x%x, "),
lino, dinode_fmt(dinoc));
if (!no_modify) {
do_warn(_("resetting to regular file\n"));
change_dinode_fmt(dinoc, S_IFREG);
*dirty = 1;
} else {
do_warn(_("would reset to regular file\n"));
}
}
if (mp->m_sb.sb_rblocks == 0 && dinoc->di_nextents != 0) {
do_warn(_("bad # of extents (%u) for realtime bitmap inode %llu\n"),
be32_to_cpu(dinoc->di_nextents), lino);
return 1;
}
return 0;
}
return 0;
}
/*
* general size/consistency checks:
*
* if the size <= size of the data fork, directories must be
* local inodes unlike regular files which would be extent inodes.
* all the other mentioned types have to have a zero size value.
*
* if the size and format don't match, get out now rather than
* risk trying to process a non-existent extents or btree
* type data fork.
*/
static int
process_check_inode_sizes(
xfs_mount_t *mp,
xfs_dinode_t *dino,
xfs_ino_t lino,
int type)
{
xfs_dinode_core_t *dinoc = &dino->di_core;
xfs_fsize_t size = be64_to_cpu(dinoc->di_size);
switch (type) {
case XR_INO_DIR:
if (size <= XFS_DFORK_DSIZE(dino, mp) &&
dinoc->di_format != XFS_DINODE_FMT_LOCAL) {
do_warn(_("mismatch between format (%d) and size "
"(%lld) in directory ino %llu\n"),
dinoc->di_format, size, lino);
return 1;
}
if (size > XFS_DIR2_LEAF_OFFSET) {
do_warn(_("directory inode %llu has bad size %lld\n"),
lino, size);
return 1;
}
break;
case XR_INO_SYMLINK:
if (process_symlink_extlist(mp, lino, dino)) {
do_warn(_("bad data fork in symlink %llu\n"), lino);
return 1;
}
break;
case XR_INO_CHRDEV: /* fall through to FIFO case ... */
case XR_INO_BLKDEV: /* fall through to FIFO case ... */
case XR_INO_SOCK: /* fall through to FIFO case ... */
case XR_INO_MOUNTPOINT: /* fall through to FIFO case ... */
case XR_INO_FIFO:
if (process_misc_ino_types(mp, dino, lino, type))
return 1;
break;
case XR_INO_RTDATA:
/*
* if we have no realtime blocks, any inode claiming
* to be a real-time file is bogus
*/
if (mp->m_sb.sb_rblocks == 0) {
do_warn(_("found inode %llu claiming to be a "
"real-time file\n"), lino);
return 1;
}
break;
case XR_INO_RTBITMAP:
if (size != (__int64_t)mp->m_sb.sb_rbmblocks *
mp->m_sb.sb_blocksize) {
do_warn(_("realtime bitmap inode %llu has bad size "
"%lld (should be %lld)\n"),
lino, size, (__int64_t) mp->m_sb.sb_rbmblocks *
mp->m_sb.sb_blocksize);
return 1;
}
break;
case XR_INO_RTSUM:
if (size != mp->m_rsumsize) {
do_warn(_("realtime summary inode %llu has bad size "
"%lld (should be %d)\n"),
lino, size, mp->m_rsumsize);
return 1;
}
break;
default:
break;
}
return 0;
}
/*
* check for illegal values of forkoff
*/
static int
process_check_inode_forkoff(
xfs_mount_t *mp,
xfs_dinode_core_t *dinoc,
xfs_ino_t lino)
{
if (dinoc->di_forkoff == 0)
return 0;
switch (dinoc->di_format) {
case XFS_DINODE_FMT_DEV:
if (dinoc->di_forkoff != (roundup(sizeof(xfs_dev_t), 8) >> 3)) {
do_warn(_("bad attr fork offset %d in dev inode %llu, "
"should be %d\n"), dinoc->di_forkoff, lino,
(int)(roundup(sizeof(xfs_dev_t), 8) >> 3));
return 1;
}
break;
case XFS_DINODE_FMT_LOCAL: /* fall through ... */
case XFS_DINODE_FMT_EXTENTS: /* fall through ... */
case XFS_DINODE_FMT_BTREE:
if (dinoc->di_forkoff >= (XFS_LITINO(mp) >> 3)) {
do_warn(_("bad attr fork offset %d in inode %llu, "
"max=%d\n"), dinoc->di_forkoff, lino,
XFS_LITINO(mp) >> 3);
return 1;
}
break;
default:
do_error(_("unexpected inode format %d\n"), dinoc->di_format);
break;
}
return 0;
}
/*
* Updates the inodes block and extent counts if they are wrong
*/
static int
process_inode_blocks_and_extents(
xfs_dinode_core_t *dinoc,
xfs_drfsbno_t nblocks,
__uint64_t nextents,
__uint64_t anextents,
xfs_ino_t lino,
int *dirty)
{
if (nblocks != be64_to_cpu(dinoc->di_nblocks)) {
if (!no_modify) {
do_warn(_("correcting nblocks for inode %llu, "
"was %llu - counted %llu\n"), lino,
be64_to_cpu(dinoc->di_nblocks), nblocks);
dinoc->di_nblocks = cpu_to_be64(nblocks);
*dirty = 1;
} else {
do_warn(_("bad nblocks %llu for inode %llu, "
"would reset to %llu\n"),
be64_to_cpu(dinoc->di_nblocks), lino, nblocks);
}
}
if (nextents > MAXEXTNUM) {
do_warn(_("too many data fork extents (%llu) in inode %llu\n"),
nextents, lino);
return 1;
}
if (nextents != be32_to_cpu(dinoc->di_nextents)) {
if (!no_modify) {
do_warn(_("correcting nextents for inode %llu, "
"was %d - counted %llu\n"), lino,
be32_to_cpu(dinoc->di_nextents), nextents);
dinoc->di_nextents = cpu_to_be32(nextents);
*dirty = 1;
} else {
do_warn(_("bad nextents %d for inode %llu, would reset "
"to %llu\n"), be32_to_cpu(dinoc->di_nextents),
lino, nextents);
}
}
if (anextents > MAXAEXTNUM) {
do_warn(_("too many attr fork extents (%llu) in inode %llu\n"),
anextents, lino);
return 1;
}
if (anextents != be16_to_cpu(dinoc->di_anextents)) {
if (!no_modify) {
do_warn(_("correcting anextents for inode %llu, "
"was %d - counted %llu\n"), lino,
be16_to_cpu(dinoc->di_anextents), anextents);
dinoc->di_anextents = cpu_to_be16(anextents);
*dirty = 1;
} else {
do_warn(_("bad anextents %d for inode %llu, would reset"
" to %llu\n"), be16_to_cpu(dinoc->di_anextents),
lino, anextents);
}
}
return 0;
}
/*
* check data fork -- if it's bad, clear the inode
*/
static int
process_inode_data_fork(
xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t ino,
xfs_dinode_t *dino,
int type,
int *dirty,
xfs_drfsbno_t *totblocks,
__uint64_t *nextents,
blkmap_t **dblkmap,
int check_dups)
{
xfs_dinode_core_t *dinoc = &dino->di_core;
xfs_ino_t lino = XFS_AGINO_TO_INO(mp, agno, ino);
int err = 0;
*nextents = be32_to_cpu(dinoc->di_nextents);
if (*nextents > be64_to_cpu(dinoc->di_nblocks) ||
*nextents > XFS_MAX_INCORE_EXTENTS)
*nextents = 1;
if (dinoc->di_format != XFS_DINODE_FMT_LOCAL && type != XR_INO_RTDATA)
*dblkmap = blkmap_alloc(*nextents);
*nextents = 0;
switch (dinoc->di_format) {
case XFS_DINODE_FMT_LOCAL:
err = process_lclinode(mp, agno, ino, dino, type, dirty,
totblocks, nextents, dblkmap, XFS_DATA_FORK,
check_dups);
break;
case XFS_DINODE_FMT_EXTENTS:
err = process_exinode(mp, agno, ino, dino, type, dirty,
totblocks, nextents, dblkmap, XFS_DATA_FORK,
check_dups);
break;
case XFS_DINODE_FMT_BTREE:
err = process_btinode(mp, agno, ino, dino, type, dirty,
totblocks, nextents, dblkmap, XFS_DATA_FORK,
check_dups);
break;
case XFS_DINODE_FMT_DEV: /* fall through */
err = 0;
break;
default:
do_error(_("unknown format %d, ino %llu (mode = %d)\n"),
dinoc->di_format, lino, be16_to_cpu(dinoc->di_mode));
}
if (err) {
do_warn(_("bad data fork in inode %llu\n"), lino);
if (!no_modify) {
*dirty += clear_dinode(mp, dino, lino);
ASSERT(*dirty > 0);
}
return 1;
}
if (check_dups) {
/*
* if check_dups was non-zero, we have to
* re-process data fork to set bitmap since the
* bitmap wasn't set the first time through
*/
switch (dinoc->di_format) {
case XFS_DINODE_FMT_LOCAL:
err = process_lclinode(mp, agno, ino, dino, type,
dirty, totblocks, nextents, dblkmap,
XFS_DATA_FORK, 0);
break;
case XFS_DINODE_FMT_EXTENTS:
err = process_exinode(mp, agno, ino, dino, type,
dirty, totblocks, nextents, dblkmap,
XFS_DATA_FORK, 0);
break;
case XFS_DINODE_FMT_BTREE:
err = process_btinode(mp, agno, ino, dino, type,
dirty, totblocks, nextents, dblkmap,
XFS_DATA_FORK, 0);
break;
case XFS_DINODE_FMT_DEV: /* fall through */
err = 0;
break;
default:
do_error(_("unknown format %d, ino %llu (mode = %d)\n"),
dinoc->di_format, lino,
be16_to_cpu(dinoc->di_mode));
}
if (no_modify && err != 0)
return 1;
ASSERT(err == 0);
}
return 0;
}
/*
* Process extended attribute fork in inode
*/
static int
process_inode_attr_fork(
xfs_mount_t *mp,
xfs_agnumber_t agno,
xfs_agino_t ino,
xfs_dinode_t *dino,
int type,
int *dirty,
xfs_drfsbno_t *atotblocks,
__uint64_t *anextents,
int check_dups,
int extra_attr_check,
int *retval)
{
xfs_dinode_core_t *dinoc = &dino->di_core;
xfs_ino_t lino = XFS_AGINO_TO_INO(mp, agno, ino);
blkmap_t *ablkmap = NULL;
int repair = 0;
int err;
if (!XFS_DFORK_Q(dino)) {
*anextents = 0;
if (dinoc->di_aformat != XFS_DINODE_FMT_EXTENTS) {
do_warn(_("bad attribute format %d in inode %llu, "),
dinoc->di_aformat, lino);
if (!no_modify) {
do_warn(_("resetting value\n"));
dinoc->di_aformat = XFS_DINODE_FMT_EXTENTS;
*dirty = 1;
} else
do_warn(_("would reset value\n"));
}
return 0;
}
*anextents = be16_to_cpu(dinoc->di_anextents);
if (*anextents > be64_to_cpu(dinoc->di_nblocks) ||
*anextents > XFS_MAX_INCORE_EXTENTS)
*anextents = 1;
switch (dinoc->di_aformat) {
case XFS_DINODE_FMT_LOCAL:
*anextents = 0;
err = process_lclinode(mp, agno, ino, dino, type, dirty,
atotblocks, anextents, &ablkmap,
XFS_ATTR_FORK, check_dups);
break;
case XFS_DINODE_FMT_EXTENTS:
ablkmap = blkmap_alloc(*anextents);
*anextents = 0;
err = process_exinode(mp, agno, ino, dino, type, dirty,
atotblocks, anextents, &ablkmap,
XFS_ATTR_FORK, check_dups);
break;
case XFS_DINODE_FMT_BTREE:
ablkmap = blkmap_alloc(*anextents);
*anextents = 0;
err = process_btinode(mp, agno, ino, dino, type, dirty,
atotblocks, anextents, &ablkmap,
XFS_ATTR_FORK, check_dups);
break;
default:
do_warn(_("illegal attribute format %d, ino %llu\n"),
dinoc->di_aformat, lino);
err = 1;
break;
}
if (err) {
/*
* clear the attribute fork if necessary. we can't
* clear the inode because we've already put the
* inode space info into the blockmap.
*
* XXX - put the inode onto the "move it" list and
* log the the attribute scrubbing
*/
do_warn(_("bad attribute fork in inode %llu"), lino);
if (!no_modify) {
if (delete_attr_ok) {
do_warn(_(", clearing attr fork\n"));
*dirty += clear_dinode_attr(mp, dino, lino);
dinoc->di_aformat = XFS_DINODE_FMT_LOCAL;
} else {
do_warn("\n");
*dirty += clear_dinode(mp, dino, lino);
}
ASSERT(*dirty > 0);
} else {
do_warn(_(", would clear attr fork\n"));
}
*atotblocks = 0;
*anextents = 0;
blkmap_free(ablkmap);
*retval = 1;
return delete_attr_ok ? 0 : 1;
}
if (check_dups) {
switch (dinoc->di_aformat) {
case XFS_DINODE_FMT_LOCAL:
err = process_lclinode(mp, agno, ino, dino,
type, dirty, atotblocks, anextents,
&ablkmap, XFS_ATTR_FORK, 0);
break;
case XFS_DINODE_FMT_EXTENTS:
err = process_exinode(mp, agno, ino, dino,
type, dirty, atotblocks, anextents,
&ablkmap, XFS_ATTR_FORK, 0);
break;
case XFS_DINODE_FMT_BTREE:
err = process_btinode(mp, agno, ino, dino,
type, dirty, atotblocks, anextents,
&ablkmap, XFS_ATTR_FORK, 0);
break;
default:
do_error(_("illegal attribute fmt %d, ino %llu\n"),
dinoc->di_aformat, lino);
}
if (no_modify && err != 0) {
blkmap_free(ablkmap);
return 1;
}
ASSERT(err == 0);
}
/*
* do attribute semantic-based consistency checks now
*/
/* get this only in phase 3, not in both phase 3 and 4 */
if (extra_attr_check &&
process_attributes(mp, lino, dino, ablkmap, &repair)) {
do_warn(_("problem with attribute contents in inode %llu\n"),
lino);
if (!repair) {
/* clear attributes if not done already */
if (!no_modify) {
*dirty += clear_dinode_attr(mp, dino, lino);
dinoc->di_aformat = XFS_DINODE_FMT_LOCAL;
} else {
do_warn(_("would clear attr fork\n"));
}
*atotblocks = 0;
*anextents = 0;
}
else {
*dirty = 1; /* it's been repaired */
}
}
blkmap_free(ablkmap);
return 0;
}
/*
* check nlinks feature, if it's a version 1 inode,
* just leave nlinks alone. even if it's set wrong,
* it'll be reset when read in.
*/
static int
process_check_inode_nlink_version(
xfs_dinode_core_t *dinoc,
xfs_ino_t lino)
{
int dirty = 0;
if (dinoc->di_version > XFS_DINODE_VERSION_1 && !fs_inode_nlink) {
/*
* do we have a fs/inode version mismatch with a valid
* version 2 inode here that has to stay version 2 or
* lose links?
*/
if (be32_to_cpu(dinoc->di_nlink) > XFS_MAXLINK_1) {
/*
* yes. are nlink inodes allowed?
*/
if (fs_inode_nlink_allowed) {
/*
* yes, update status variable which will
* cause sb to be updated later.
*/
fs_inode_nlink = 1;
do_warn(_("version 2 inode %llu claims > %u links, "),
lino, XFS_MAXLINK_1);
if (!no_modify) {
do_warn(_("updating superblock "
"version number\n"));
} else {
do_warn(_("would update superblock "
"version number\n"));
}
} else {
/*
* no, have to convert back to onlinks
* even if we lose some links
*/
do_warn(_("WARNING: version 2 inode %llu "
"claims > %u links, "),
lino, XFS_MAXLINK_1);
if (!no_modify) {
do_warn(_("converting back to version 1,\n"
"this may destroy %d links\n"),
be32_to_cpu(dinoc->di_nlink) -
XFS_MAXLINK_1);
dinoc->di_version = XFS_DINODE_VERSION_1;
dinoc->di_nlink = cpu_to_be32(XFS_MAXLINK_1);
dinoc->di_onlink = cpu_to_be16(XFS_MAXLINK_1);
dirty = 1;
} else {
do_warn(_("would convert back to version 1,\n"
"\tthis might destroy %d links\n"),
be32_to_cpu(dinoc->di_nlink) -
XFS_MAXLINK_1);
}
}
} else {
/*
* do we have a v2 inode that we could convert back
* to v1 without losing any links? if we do and
* we have a mismatch between superblock bits and the
* version bit, alter the version bit in this case.
*
* the case where we lost links was handled above.
*/
do_warn(_("found version 2 inode %llu, "), lino);
if (!no_modify) {
do_warn(_("converting back to version 1\n"));
dinoc->di_version = XFS_DINODE_VERSION_1;
dinoc->di_onlink = cpu_to_be16(
be32_to_cpu(dinoc->di_nlink));
dirty = 1;
} else {
do_warn(_("would convert back to version 1\n"));
}
}
}
/*
* ok, if it's still a version 2 inode, it's going
* to stay a version 2 inode. it should have a zero
* onlink field, so clear it.
*/
if (dinoc->di_version > XFS_DINODE_VERSION_1 &&
dinoc->di_onlink != 0 && fs_inode_nlink > 0) {
if (!no_modify) {
do_warn(_("clearing obsolete nlink field in "
"version 2 inode %llu, was %d, now 0\n"),
lino, be16_to_cpu(dinoc->di_onlink));
dinoc->di_onlink = 0;
dirty = 1;
} else {
do_warn(_("would clear obsolete nlink field in "
"version 2 inode %llu, currently %d\n"),
lino, be16_to_cpu(dinoc->di_onlink));
}
}
return dirty;
}
/*
* returns 0 if the inode is ok, 1 if the inode is corrupt
* check_dups can be set to 1 *only* when called by the
* first pass of the duplicate block checking of phase 4.
* *dirty is set > 0 if the dinode has been altered and
* needs to be written out.
*
* for detailed, info, look at process_dinode() comments.
*/
/* ARGSUSED */
int
process_dinode_int(xfs_mount_t *mp,
xfs_dinode_t *dino,
xfs_agnumber_t agno,
xfs_agino_t ino,
int was_free, /* 1 if inode is currently free */
int *dirty, /* out == > 0 if inode is now dirty */
int *used, /* out == 1 if inode is in use */
int verify_mode, /* 1 == verify but don't modify inode */
int uncertain, /* 1 == inode is uncertain */
int ino_discovery, /* 1 == check dirs for unknown inodes */
int check_dups, /* 1 == check if inode claims
* duplicate blocks */
int extra_attr_check, /* 1 == do attribute format and value checks */
int *isa_dir, /* out == 1 if inode is a directory */
xfs_ino_t *parent) /* out -- parent if ino is a dir */
{
xfs_drfsbno_t totblocks = 0;
xfs_drfsbno_t atotblocks = 0;
xfs_dinode_core_t *dinoc;
int di_mode;
int type;
int retval = 0;
__uint64_t nextents;
__uint64_t anextents;
xfs_ino_t lino;
const int is_free = 0;
const int is_used = 1;
blkmap_t *dblkmap = NULL;
*dirty = *isa_dir = 0;
*used = is_used;
type = XR_INO_UNKNOWN;
dinoc = &dino->di_core;
lino = XFS_AGINO_TO_INO(mp, agno, ino);
di_mode = be16_to_cpu(dinoc->di_mode);
/*
* if in verify mode, don't modify the inode.
*
* if correcting, reset stuff that has known values
*
* if in uncertain mode, be silent on errors since we're
* trying to find out if these are inodes as opposed
* to assuming that they are. Just return the appropriate
* return code in that case.
*
* If uncertain is set, verify_mode MUST be set.
*/
ASSERT(uncertain == 0 || verify_mode != 0);
if (be16_to_cpu(dinoc->di_magic) != XFS_DINODE_MAGIC) {
retval = 1;
if (!uncertain)
do_warn(_("bad magic number 0x%x on inode %llu%c"),
be16_to_cpu(dinoc->di_magic), lino,
verify_mode ? '\n' : ',');
if (!verify_mode) {
if (!no_modify) {
do_warn(_(" resetting magic number\n"));
dinoc->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
*dirty = 1;
} else
do_warn(_(" would reset magic number\n"));
}
}
if (!XFS_DINODE_GOOD_VERSION(dinoc->di_version) ||
(!fs_inode_nlink && dinoc->di_version > XFS_DINODE_VERSION_1)) {
retval = 1;
if (!uncertain)
do_warn(_("bad version number 0x%x on inode %llu%c"),
dinoc->di_version, lino,
verify_mode ? '\n' : ',');
if (!verify_mode) {
if (!no_modify) {
do_warn(_(" resetting version number\n"));
dinoc->di_version = (fs_inode_nlink) ?
XFS_DINODE_VERSION_2 :
XFS_DINODE_VERSION_1;
*dirty = 1;
} else
do_warn(_(" would reset version number\n"));
}
}
/*
* blow out of here if the inode size is < 0
*/
if ((xfs_fsize_t)be64_to_cpu(dinoc->di_size) < 0) {
if (!uncertain)
do_warn(_("bad (negative) size %lld on inode %llu\n"),
be64_to_cpu(dinoc->di_size), lino);
if (verify_mode)
return 1;
goto clear_bad_out;
}
/*
* if not in verify mode, check to sii if the inode and imap
* agree that the inode is free
*/
if (!verify_mode && di_mode == 0) {
/*
* was_free value is not meaningful if we're in verify mode
*/
if (was_free) {
/*
* easy case, inode free -- inode and map agree, clear
* it just in case to ensure that format, etc. are
* set correctly
*/
if (!no_modify)
*dirty += clear_dinode(mp, dino, lino);
*used = is_free;
return 0;
}
/*
* the inode looks free but the map says it's in use.
* clear the inode just to be safe and mark the inode
* free.
*/
do_warn(_("imap claims a free inode %llu is in use, "), lino);
if (!no_modify) {
do_warn(_("correcting imap and clearing inode\n"));
*dirty += clear_dinode(mp, dino, lino);
retval = 1;
} else
do_warn(_("would correct imap and clear inode\n"));
*used = is_free;
return retval;
}
/*
* because of the lack of any write ordering guarantee, it's
* possible that the core got updated but the forks didn't.
* so rather than be ambitious (and probably incorrect),
* if there's an inconsistency, we get conservative and
* just pitch the file. blow off checking formats of
* free inodes since technically any format is legal
* as we reset the inode when we re-use it.
*/
if (di_mode != 0 && check_dinode_mode_format(dinoc) != 0) {
if (!uncertain)
do_warn(_("bad inode format in inode %llu\n"), lino);
if (verify_mode)
return 1;
goto clear_bad_out;
}
if (verify_mode)
return retval;
/*
* clear the next unlinked field if necessary on a good
* inode only during phase 4 -- when checking for inodes
* referencing duplicate blocks. then it's safe because
* we've done the inode discovery and have found all the inodes
* we're going to find. check_dups is set to 1 only during
* phase 4. Ugly.
*/
if (check_dups && !no_modify)
*dirty += clear_dinode_unlinked(mp, dino);
/* set type and map type info */
switch (di_mode & S_IFMT) {
case S_IFDIR:
type = XR_INO_DIR;
*isa_dir = 1;
break;
case S_IFREG:
if (be16_to_cpu(dinoc->di_flags) & XFS_DIFLAG_REALTIME)
type = XR_INO_RTDATA;
else if (lino == mp->m_sb.sb_rbmino)
type = XR_INO_RTBITMAP;
else if (lino == mp->m_sb.sb_rsumino)
type = XR_INO_RTSUM;
else
type = XR_INO_DATA;
break;
case S_IFLNK:
type = XR_INO_SYMLINK;
break;
case S_IFCHR:
type = XR_INO_CHRDEV;
break;
case S_IFBLK:
type = XR_INO_BLKDEV;
break;
case S_IFSOCK:
type = XR_INO_SOCK;
break;
case S_IFIFO:
type = XR_INO_FIFO;
break;
default:
do_warn(_("bad inode type %#o inode %llu\n"),
di_mode & S_IFMT, lino);
goto clear_bad_out;
}
/*
* type checks for superblock inodes
*/
if (process_check_sb_inodes(mp, dinoc, lino, &type, dirty) != 0)
goto clear_bad_out;
/*
* only regular files with REALTIME or EXTSIZE flags set can have
* extsize set, or directories with EXTSZINHERIT.
*/
if (be32_to_cpu(dinoc->di_extsize) != 0) {
if ((type == XR_INO_RTDATA) ||
(type == XR_INO_DIR && (be16_to_cpu(dinoc->di_flags) &
XFS_DIFLAG_EXTSZINHERIT)) ||
(type == XR_INO_DATA && (be16_to_cpu(dinoc->di_flags) &
XFS_DIFLAG_EXTSIZE))) {
/* s'okay */ ;
} else {
do_warn(_("bad non-zero extent size %u for "
"non-realtime/extsize inode %llu, "),
be32_to_cpu(dinoc->di_extsize), lino);
if (!no_modify) {
do_warn(_("resetting to zero\n"));
dinoc->di_extsize = 0;
*dirty = 1;
} else
do_warn(_("would reset to zero\n"));
}
}
/*
* general size/consistency checks:
*/
if (process_check_inode_sizes(mp, dino, lino, type) != 0)
goto clear_bad_out;
/*
* check for illegal values of forkoff
*/
if (process_check_inode_forkoff(mp, dinoc, lino) != 0)
goto clear_bad_out;
/*
* check data fork -- if it's bad, clear the inode
*/
if (process_inode_data_fork(mp, agno, ino, dino, type, dirty,
&totblocks, &nextents, &dblkmap, check_dups) != 0)
goto bad_out;
/*
* check attribute fork if necessary. attributes are
* always stored in the regular filesystem.
*/
if (process_inode_attr_fork(mp, agno, ino, dino, type, dirty,
&atotblocks, &anextents, check_dups, extra_attr_check,
&retval))
goto bad_out;
/*
* enforce totblocks is 0 for misc types
*/
if (process_misc_ino_types_blocks(totblocks, lino, type))
goto clear_bad_out;
/*
* correct space counters if required
*/
if (process_inode_blocks_and_extents(dinoc, totblocks + atotblocks,
nextents, anextents, lino, dirty) != 0)
goto clear_bad_out;
/*
* do any semantic type-based checking here
*/
switch (type) {
case XR_INO_DIR:
if (xfs_sb_version_hasdirv2(&mp->m_sb) ?
process_dir2(mp, lino, dino, ino_discovery,
dirty, "", parent, dblkmap) :
process_dir(mp, lino, dino, ino_discovery,
dirty, "", parent, dblkmap)) {
do_warn(_("problem with directory contents in "
"inode %llu\n"), lino);
goto clear_bad_out;
}
break;
case XR_INO_SYMLINK:
if (process_symlink(mp, lino, dino, dblkmap) != 0) {
do_warn(_("problem with symbolic link in inode %llu\n"),
lino);
goto clear_bad_out;
}
break;
default:
break;
}
if (dblkmap)
blkmap_free(dblkmap);
/*
* check nlinks feature, if it's a version 1 inode,
* just leave nlinks alone. even if it's set wrong,
* it'll be reset when read in.
*/
*dirty = process_check_inode_nlink_version(dinoc, lino);
return retval;
clear_bad_out:
if (!no_modify) {
*dirty += clear_dinode(mp, dino, lino);
ASSERT(*dirty > 0);
}
bad_out:
*used = is_free;
*isa_dir = 0;
if (dblkmap)
blkmap_free(dblkmap);
return 1;
}
/*
* returns 1 if inode is used, 0 if free.
* performs any necessary salvaging actions.
* note that we leave the generation count alone
* because nothing we could set it to would be
* guaranteed to be correct so the best guess for
* the correct value is just to leave it alone.
*
* The trick is detecting empty files. For those,
* the core and the forks should all be in the "empty"
* or zero-length state -- a zero or possibly minimum length
* (in the case of dirs) extent list -- although inline directories
* and symlinks might be handled differently. So it should be
* possible to sanity check them against each other.
*
* If the forks are an empty extent list though, then forget it.
* The file is toast anyway since we can't recover its storage.
*
* Parameters:
* Ins:
* mp -- mount structure
* dino -- pointer to on-disk inode structure
* agno/ino -- inode numbers
* free -- whether the map thinks the inode is free (1 == free)
* ino_discovery -- whether we should examine directory
* contents to discover new inodes
* check_dups -- whether we should check to see if the
* inode references duplicate blocks
* if so, we compare the inode's claimed
* blocks against the contents of the
* duplicate extent list but we don't
* set the bitmap. If not, we set the
* bitmap and try and detect multiply
* claimed blocks using the bitmap.
* Outs:
* dirty -- whether we changed the inode (1 == yes)
* used -- 1 if the inode is used, 0 if free. In no modify
* mode, whether the inode should be used or free
* isa_dir -- 1 if the inode is a directory, 0 if not. In
* no modify mode, if the inode would be a dir or not.
*
* Return value -- 0 if the inode is good, 1 if it is/was corrupt
*/
int
process_dinode(
xfs_mount_t *mp,
xfs_dinode_t *dino,
xfs_agnumber_t agno,
xfs_agino_t ino,
int was_free,
int *dirty,
int *used,
int ino_discovery,
int check_dups,
int extra_attr_check,
int *isa_dir,
xfs_ino_t *parent)
{
const int verify_mode = 0;
const int uncertain = 0;
#ifdef XR_INODE_TRACE
fprintf(stderr, "processing inode %d/%d\n", agno, ino);
#endif
return process_dinode_int(mp, dino, agno, ino, was_free, dirty, used,
verify_mode, uncertain, ino_discovery,
check_dups, extra_attr_check, isa_dir, parent);
}
/*
* a more cursory check, check inode core, *DON'T* check forks
* this basically just verifies whether the inode is an inode
* and whether or not it has been totally trashed. returns 0
* if the inode passes the cursory sanity check, 1 otherwise.
*/
int
verify_dinode(
xfs_mount_t *mp,
xfs_dinode_t *dino,
xfs_agnumber_t agno,
xfs_agino_t ino)
{
xfs_ino_t parent;
int used = 0;
int dirty = 0;
int isa_dir = 0;
const int verify_mode = 1;
const int check_dups = 0;
const int ino_discovery = 0;
const int uncertain = 0;
return process_dinode_int(mp, dino, agno, ino, 0, &dirty, &used,
verify_mode, uncertain, ino_discovery,
check_dups, 0, &isa_dir, &parent);
}
/*
* like above only for inode on the uncertain list. it sets
* the uncertain flag which makes process_dinode_int quieter.
* returns 0 if the inode passes the cursory sanity check, 1 otherwise.
*/
int
verify_uncertain_dinode(
xfs_mount_t *mp,
xfs_dinode_t *dino,
xfs_agnumber_t agno,
xfs_agino_t ino)
{
xfs_ino_t parent;
int used = 0;
int dirty = 0;
int isa_dir = 0;
const int verify_mode = 1;
const int check_dups = 0;
const int ino_discovery = 0;
const int uncertain = 1;
return process_dinode_int(mp, dino, agno, ino, 0, &dirty, &used,
verify_mode, uncertain, ino_discovery,
check_dups, 0, &isa_dir, &parent);
}
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