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kernel / pub / scm / linux / kernel / git / cem / xfsprogs-dev / refs/heads/libxfs-commit-script / . / repair / scan.c
blob: 9c9be68939c4bbf8e9d735671f2716345b63de42 [file] [log] [blame]
/*
* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <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 "scan.h"
#include "versions.h"
#include "bmap.h"
#include "progress.h"
#include "threads.h"
static xfs_mount_t *mp = NULL;
/*
* Variables to validate AG header values against the manual count
* from the btree traversal.
*/
struct aghdr_cnts {
xfs_agnumber_t agno;
xfs_extlen_t agffreeblks;
xfs_extlen_t agflongest;
__uint64_t agfbtreeblks;
__uint32_t agicount;
__uint32_t agifreecount;
__uint64_t fdblocks;
__uint64_t icount;
__uint64_t ifreecount;
__uint32_t fibtfreecount;
};
void
set_mp(xfs_mount_t *mpp)
{
libxfs_bcache_purge();
mp = mpp;
}
static void
scan_sbtree(
xfs_agblock_t root,
int nlevels,
xfs_agnumber_t agno,
int suspect,
void (*func)(struct xfs_btree_block *block,
int level,
xfs_agblock_t bno,
xfs_agnumber_t agno,
int suspect,
int isroot,
__uint32_t magic,
void *priv),
int isroot,
__uint32_t magic,
void *priv,
const struct xfs_buf_ops *ops)
{
xfs_buf_t *bp;
bp = libxfs_readbuf(mp->m_dev, XFS_AGB_TO_DADDR(mp, agno, root),
XFS_FSB_TO_BB(mp, 1), 0, ops);
if (!bp) {
do_error(_("can't read btree block %d/%d\n"), agno, root);
return;
}
if (bp->b_error == EFSBADCRC || bp->b_error == EFSCORRUPTED) {
do_warn(_("btree block %d/%d is suspect, error %d\n"),
agno, root, bp->b_error);
suspect = 1;
}
(*func)(XFS_BUF_TO_BLOCK(bp), nlevels - 1, root, agno, suspect,
isroot, magic, priv);
libxfs_putbuf(bp);
}
/*
* returns 1 on bad news (inode needs to be cleared), 0 on good
*/
int
scan_lbtree(
xfs_fsblock_t root,
int nlevels,
int (*func)(struct xfs_btree_block *block,
int level,
int type,
int whichfork,
xfs_fsblock_t bno,
xfs_ino_t ino,
xfs_rfsblock_t *tot,
__uint64_t *nex,
blkmap_t **blkmapp,
bmap_cursor_t *bm_cursor,
int isroot,
int check_dups,
int *dirty,
__uint64_t magic),
int type,
int whichfork,
xfs_ino_t ino,
xfs_rfsblock_t *tot,
__uint64_t *nex,
blkmap_t **blkmapp,
bmap_cursor_t *bm_cursor,
int isroot,
int check_dups,
__uint64_t magic,
const struct xfs_buf_ops *ops)
{
xfs_buf_t *bp;
int err;
int dirty = 0;
bool badcrc = false;
bp = libxfs_readbuf(mp->m_dev, XFS_FSB_TO_DADDR(mp, root),
XFS_FSB_TO_BB(mp, 1), 0, ops);
if (!bp) {
do_error(_("can't read btree block %d/%d\n"),
XFS_FSB_TO_AGNO(mp, root),
XFS_FSB_TO_AGBNO(mp, root));
return(1);
}
/*
* only check for bad CRC here - caller will determine if there
* is a corruption or not and whether it got corrected and so needs
* writing back. CRC errors always imply we need to write the block.
*/
if (bp->b_error == EFSBADCRC) {
do_warn(_("btree block %d/%d is suspect, error %d\n"),
XFS_FSB_TO_AGNO(mp, root),
XFS_FSB_TO_AGBNO(mp, root), bp->b_error);
badcrc = true;
}
err = (*func)(XFS_BUF_TO_BLOCK(bp), nlevels - 1,
type, whichfork, root, ino, tot, nex, blkmapp,
bm_cursor, isroot, check_dups, &dirty,
magic);
ASSERT(dirty == 0 || (dirty && !no_modify));
if ((dirty || badcrc) && !no_modify)
libxfs_writebuf(bp, 0);
else
libxfs_putbuf(bp);
return(err);
}
int
scan_bmapbt(
struct xfs_btree_block *block,
int level,
int type,
int whichfork,
xfs_fsblock_t bno,
xfs_ino_t ino,
xfs_rfsblock_t *tot,
__uint64_t *nex,
blkmap_t **blkmapp,
bmap_cursor_t *bm_cursor,
int isroot,
int check_dups,
int *dirty,
__uint64_t magic)
{
int i;
int err;
xfs_bmbt_ptr_t *pp;
xfs_bmbt_key_t *pkey;
xfs_bmbt_rec_t *rp;
xfs_fileoff_t first_key;
xfs_fileoff_t last_key;
char *forkname = get_forkname(whichfork);
int numrecs;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
int state;
/*
* unlike the ag freeblock btrees, if anything looks wrong
* in an inode bmap tree, just bail. it's possible that
* we'll miss a case where the to-be-toasted inode and
* another inode are claiming the same block but that's
* highly unlikely.
*/
if (be32_to_cpu(block->bb_magic) != magic) {
do_warn(
_("bad magic # %#x in inode %" PRIu64 " (%s fork) bmbt block %" PRIu64 "\n"),
be32_to_cpu(block->bb_magic), ino, forkname, bno);
return(1);
}
if (be16_to_cpu(block->bb_level) != level) {
do_warn(
_("expected level %d got %d in inode %" PRIu64 ", (%s fork) bmbt block %" PRIu64 "\n"),
level, be16_to_cpu(block->bb_level),
ino, forkname, bno);
return(1);
}
if (magic == XFS_BMAP_CRC_MAGIC) {
/* verify owner */
if (be64_to_cpu(block->bb_u.l.bb_owner) != ino) {
do_warn(
_("expected owner inode %" PRIu64 ", got %llu, bmbt block %" PRIu64 "\n"),
ino, be64_to_cpu(block->bb_u.l.bb_owner), bno);
return 1;
}
/* verify block number */
if (be64_to_cpu(block->bb_u.l.bb_blkno) !=
XFS_FSB_TO_DADDR(mp, bno)) {
do_warn(
_("expected block %" PRIu64 ", got %llu, bmbt block %" PRIu64 "\n"),
XFS_FSB_TO_DADDR(mp, bno),
be64_to_cpu(block->bb_u.l.bb_blkno), bno);
return 1;
}
/* verify uuid */
if (platform_uuid_compare(&block->bb_u.l.bb_uuid,
&mp->m_sb.sb_uuid) != 0) {
do_warn(
_("wrong FS UUID, bmbt block %" PRIu64 "\n"),
bno);
return 1;
}
}
if (check_dups == 0) {
/*
* check sibling pointers. if bad we have a conflict
* between the sibling pointers and the child pointers
* in the parent block. blow out the inode if that happens
*/
if (bm_cursor->level[level].fsbno != NULLFSBLOCK) {
/*
* this is not the first block on this level
* so the cursor for this level has recorded the
* values for this's block left-sibling.
*/
if (bno != bm_cursor->level[level].right_fsbno) {
do_warn(
_("bad fwd (right) sibling pointer (saw %" PRIu64 " parent block says %" PRIu64 ")\n"
"\tin inode %" PRIu64 " (%s fork) bmap btree block %" PRIu64 "\n"),
bm_cursor->level[level].right_fsbno,
bno, ino, forkname,
bm_cursor->level[level].fsbno);
return(1);
}
if (be64_to_cpu(block->bb_u.l.bb_leftsib) !=
bm_cursor->level[level].fsbno) {
do_warn(
_("bad back (left) sibling pointer (saw %llu parent block says %" PRIu64 ")\n"
"\tin inode %" PRIu64 " (%s fork) bmap btree block %" PRIu64 "\n"),
(unsigned long long)
be64_to_cpu(block->bb_u.l.bb_leftsib),
bm_cursor->level[level].fsbno,
ino, forkname, bno);
return(1);
}
} else {
/*
* This is the first or only block on this level.
* Check that the left sibling pointer is NULL
*/
if (be64_to_cpu(block->bb_u.l.bb_leftsib) != NULLFSBLOCK) {
do_warn(
_("bad back (left) sibling pointer (saw %llu should be NULL (0))\n"
"\tin inode %" PRIu64 " (%s fork) bmap btree block %" PRIu64 "\n"),
(unsigned long long)
be64_to_cpu(block->bb_u.l.bb_leftsib),
ino, forkname, bno);
return(1);
}
}
/*
* update cursor block pointers to reflect this block
*/
bm_cursor->level[level].fsbno = bno;
bm_cursor->level[level].left_fsbno =
be64_to_cpu(block->bb_u.l.bb_leftsib);
bm_cursor->level[level].right_fsbno =
be64_to_cpu(block->bb_u.l.bb_rightsib);
agno = XFS_FSB_TO_AGNO(mp, bno);
agbno = XFS_FSB_TO_AGBNO(mp, bno);
pthread_mutex_lock(&ag_locks[agno].lock);
state = get_bmap(agno, agbno);
switch (state) {
case XR_E_UNKNOWN:
case XR_E_FREE1:
case XR_E_FREE:
set_bmap(agno, agbno, XR_E_INUSE);
break;
case XR_E_FS_MAP:
case XR_E_INUSE:
/*
* we'll try and continue searching here since
* the block looks like it's been claimed by file
* to store user data, a directory to store directory
* data, or the space allocation btrees but since
* we made it here, the block probably
* contains btree data.
*/
set_bmap(agno, agbno, XR_E_MULT);
do_warn(
_("inode 0x%" PRIx64 "bmap block 0x%" PRIx64 " claimed, state is %d\n"),
ino, bno, state);
break;
case XR_E_MULT:
case XR_E_INUSE_FS:
set_bmap(agno, agbno, XR_E_MULT);
do_warn(
_("inode 0x%" PRIx64 " bmap block 0x%" PRIx64 " claimed, state is %d\n"),
ino, bno, state);
/*
* if we made it to here, this is probably a bmap block
* that is being used by *another* file as a bmap block
* so the block will be valid. Both files should be
* trashed along with any other file that impinges on
* any blocks referenced by either file. So we
* continue searching down this btree to mark all
* blocks duplicate
*/
break;
case XR_E_BAD_STATE:
default:
do_warn(
_("bad state %d, inode %" PRIu64 " bmap block 0x%" PRIx64 "\n"),
state, ino, bno);
break;
}
pthread_mutex_unlock(&ag_locks[agno].lock);
} else {
/*
* attribute fork for realtime files is in the regular
* filesystem
*/
if (type != XR_INO_RTDATA || whichfork != XFS_DATA_FORK) {
if (search_dup_extent(XFS_FSB_TO_AGNO(mp, bno),
XFS_FSB_TO_AGBNO(mp, bno),
XFS_FSB_TO_AGBNO(mp, bno) + 1))
return(1);
} else {
if (search_rt_dup_extent(mp, bno))
return(1);
}
}
(*tot)++;
numrecs = be16_to_cpu(block->bb_numrecs);
if (level == 0) {
if (numrecs > mp->m_bmap_dmxr[0] || (isroot == 0 && numrecs <
mp->m_bmap_dmnr[0])) {
do_warn(
_("inode %" PRIu64 " bad # of bmap records (%u, min - %u, max - %u)\n"),
ino, numrecs, mp->m_bmap_dmnr[0],
mp->m_bmap_dmxr[0]);
return(1);
}
rp = XFS_BMBT_REC_ADDR(mp, block, 1);
*nex += numrecs;
/*
* 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) {
err = process_bmbt_reclist(mp, rp, &numrecs, type, ino,
tot, blkmapp, &first_key,
&last_key, whichfork);
if (err)
return 1;
/*
* check that key ordering is monotonically increasing.
* if the last_key value in the cursor is set to
* NULLFILEOFF, then we know this is the first block
* on the leaf level and we shouldn't check the
* last_key value.
*/
if (first_key <= bm_cursor->level[level].last_key &&
bm_cursor->level[level].last_key !=
NULLFILEOFF) {
do_warn(
_("out-of-order bmap key (file offset) in inode %" PRIu64 ", %s fork, fsbno %" PRIu64 "\n"),
ino, forkname, bno);
return(1);
}
/*
* update cursor keys to reflect this block.
* don't have to check if last_key is > first_key
* since that gets checked by process_bmbt_reclist.
*/
bm_cursor->level[level].first_key = first_key;
bm_cursor->level[level].last_key = last_key;
return 0;
} else {
return scan_bmbt_reclist(mp, rp, &numrecs, type, ino,
tot, whichfork);
}
}
if (numrecs > mp->m_bmap_dmxr[1] || (isroot == 0 && numrecs <
mp->m_bmap_dmnr[1])) {
do_warn(
_("inode %" PRIu64 " bad # of bmap records (%u, min - %u, max - %u)\n"),
ino, numrecs, mp->m_bmap_dmnr[1], mp->m_bmap_dmxr[1]);
return(1);
}
pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
pkey = XFS_BMBT_KEY_ADDR(mp, block, 1);
last_key = NULLFILEOFF;
for (i = 0, err = 0; i < numrecs; i++) {
/*
* XXX - if we were going to fix up the interior btree nodes,
* 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, be64_to_cpu(pp[i]))) {
do_warn(
_("bad bmap btree ptr 0x%llx in ino %" PRIu64 "\n"),
(unsigned long long) be64_to_cpu(pp[i]), ino);
return(1);
}
err = scan_lbtree(be64_to_cpu(pp[i]), level, scan_bmapbt,
type, whichfork, ino, tot, nex, blkmapp,
bm_cursor, 0, check_dups, magic,
&xfs_bmbt_buf_ops);
if (err)
return(1);
/*
* fix key (offset) mismatches between the first key
* in the child block (as recorded in the cursor) and the
* key in the interior node referencing the child block.
*
* fixes cases where entries have been shifted between
* child blocks but the parent hasn't been updated. We
* don't have to worry about the key values in the cursor
* not being set since we only look at the key values of
* our child and those are guaranteed to be set by the
* call to scan_lbtree() above.
*/
if (check_dups == 0 && be64_to_cpu(pkey[i].br_startoff) !=
bm_cursor->level[level-1].first_key) {
if (!no_modify) {
do_warn(
_("correcting bt key (was %llu, now %" PRIu64 ") in inode %" PRIu64 "\n"
"\t\t%s fork, btree block %" PRIu64 "\n"),
(unsigned long long)
be64_to_cpu(pkey[i].br_startoff),
bm_cursor->level[level-1].first_key,
ino,
forkname, bno);
*dirty = 1;
pkey[i].br_startoff = cpu_to_be64(
bm_cursor->level[level-1].first_key);
} else {
do_warn(
_("bad btree key (is %llu, should be %" PRIu64 ") in inode %" PRIu64 "\n"
"\t\t%s fork, btree block %" PRIu64 "\n"),
(unsigned long long)
be64_to_cpu(pkey[i].br_startoff),
bm_cursor->level[level-1].first_key,
ino, forkname, bno);
}
}
}
/*
* If we're the last node at our level, check that the last child
* block's forward sibling pointer is NULL.
*/
if (check_dups == 0 &&
bm_cursor->level[level].right_fsbno == NULLFSBLOCK &&
bm_cursor->level[level - 1].right_fsbno != NULLFSBLOCK) {
do_warn(
_("bad fwd (right) sibling pointer (saw %" PRIu64 " should be NULLFSBLOCK)\n"
"\tin inode %" PRIu64 " (%s fork) bmap btree block %" PRIu64 "\n"),
bm_cursor->level[level - 1].right_fsbno,
ino, forkname, bm_cursor->level[level - 1].fsbno);
return(1);
}
/*
* update cursor keys to reflect this block
*/
if (check_dups == 0) {
bm_cursor->level[level].first_key =
be64_to_cpu(pkey[0].br_startoff);
bm_cursor->level[level].last_key =
be64_to_cpu(pkey[numrecs - 1].br_startoff);
}
return(0);
}
static void
scan_allocbt(
struct xfs_btree_block *block,
int level,
xfs_agblock_t bno,
xfs_agnumber_t agno,
int suspect,
int isroot,
__uint32_t magic,
void *priv)
{
struct aghdr_cnts *agcnts = priv;
const char *name;
int i;
xfs_alloc_ptr_t *pp;
xfs_alloc_rec_t *rp;
int hdr_errors = 0;
int numrecs;
int state;
xfs_extlen_t lastcount = 0;
xfs_agblock_t lastblock = 0;
switch (magic) {
case XFS_ABTB_CRC_MAGIC:
case XFS_ABTB_MAGIC:
name = "bno";
break;
case XFS_ABTC_CRC_MAGIC:
case XFS_ABTC_MAGIC:
name = "cnt";
break;
default:
name = "(unknown)";
assert(0);
break;
}
if (be32_to_cpu(block->bb_magic) != magic) {
do_warn(_("bad magic # %#x in bt%s block %d/%d\n"),
be32_to_cpu(block->bb_magic), name, agno, bno);
hdr_errors++;
if (suspect)
return;
}
/*
* All freespace btree blocks except the roots are freed for a
* fully used filesystem, thus they are counted towards the
* free data block counter.
*/
if (!isroot) {
agcnts->agfbtreeblks++;
agcnts->fdblocks++;
}
if (be16_to_cpu(block->bb_level) != level) {
do_warn(_("expected level %d got %d in bt%s block %d/%d\n"),
level, be16_to_cpu(block->bb_level), name, agno, bno);
hdr_errors++;
if (suspect)
return;
}
/*
* check for btree blocks multiply claimed
*/
state = get_bmap(agno, bno);
if (state != XR_E_UNKNOWN) {
set_bmap(agno, bno, XR_E_MULT);
do_warn(
_("%s freespace btree block claimed (state %d), agno %d, bno %d, suspect %d\n"),
name, state, agno, bno, suspect);
return;
}
set_bmap(agno, bno, XR_E_FS_MAP);
numrecs = be16_to_cpu(block->bb_numrecs);
if (level == 0) {
if (numrecs > mp->m_alloc_mxr[0]) {
numrecs = mp->m_alloc_mxr[0];
hdr_errors++;
}
if (isroot == 0 && numrecs < mp->m_alloc_mnr[0]) {
numrecs = mp->m_alloc_mnr[0];
hdr_errors++;
}
if (hdr_errors) {
do_warn(
_("bad btree nrecs (%u, min=%u, max=%u) in bt%s block %u/%u\n"),
be16_to_cpu(block->bb_numrecs),
mp->m_alloc_mnr[0], mp->m_alloc_mxr[0],
name, agno, bno);
suspect++;
}
rp = XFS_ALLOC_REC_ADDR(mp, block, 1);
for (i = 0; i < numrecs; i++) {
xfs_agblock_t b, end;
xfs_extlen_t len, blen;
b = be32_to_cpu(rp[i].ar_startblock);
len = be32_to_cpu(rp[i].ar_blockcount);
end = b + len;
if (b == 0 || !verify_agbno(mp, agno, b)) {
do_warn(
_("invalid start block %u in record %u of %s btree block %u/%u\n"),
b, i, name, agno, bno);
continue;
}
if (len == 0 || !verify_agbno(mp, agno, end - 1)) {
do_warn(
_("invalid length %u in record %u of %s btree block %u/%u\n"),
len, i, name, agno, bno);
continue;
}
if (magic == XFS_ABTB_MAGIC ||
magic == XFS_ABTB_CRC_MAGIC) {
if (b <= lastblock) {
do_warn(_(
"out-of-order bno btree record %d (%u %u) block %u/%u\n"),
i, b, len, agno, bno);
} else {
lastblock = b;
}
} else {
agcnts->fdblocks += len;
agcnts->agffreeblks += len;
if (len > agcnts->agflongest)
agcnts->agflongest = len;
if (len < lastcount) {
do_warn(_(
"out-of-order cnt btree record %d (%u %u) block %u/%u\n"),
i, b, len, agno, bno);
} else {
lastcount = len;
}
}
for ( ; b < end; b += blen) {
state = get_bmap_ext(agno, b, end, &blen);
switch (state) {
case XR_E_UNKNOWN:
set_bmap(agno, b, XR_E_FREE1);
break;
case XR_E_FREE1:
/*
* no warning messages -- we'll catch
* FREE1 blocks later
*/
if (magic == XFS_ABTC_MAGIC ||
magic == XFS_ABTC_CRC_MAGIC) {
set_bmap_ext(agno, b, blen,
XR_E_FREE);
break;
}
default:
do_warn(
_("block (%d,%d-%d) multiply claimed by %s space tree, state - %d\n"),
agno, b, b + blen - 1,
name, state);
break;
}
}
}
return;
}
/*
* interior record
*/
pp = XFS_ALLOC_PTR_ADDR(mp, block, 1, mp->m_alloc_mxr[1]);
if (numrecs > mp->m_alloc_mxr[1]) {
numrecs = mp->m_alloc_mxr[1];
hdr_errors++;
}
if (isroot == 0 && numrecs < mp->m_alloc_mnr[1]) {
numrecs = mp->m_alloc_mnr[1];
hdr_errors++;
}
/*
* don't pass bogus tree flag down further if this block
* looked ok. bail out if two levels in a row look bad.
*/
if (hdr_errors) {
do_warn(
_("bad btree nrecs (%u, min=%u, max=%u) in bt%s block %u/%u\n"),
be16_to_cpu(block->bb_numrecs),
mp->m_alloc_mnr[1], mp->m_alloc_mxr[1],
name, agno, bno);
if (suspect)
return;
suspect++;
} else if (suspect) {
suspect = 0;
}
for (i = 0; i < numrecs; i++) {
xfs_agblock_t bno = be32_to_cpu(pp[i]);
/*
* XXX - put sibling detection right here.
* we know our sibling chain is good. So as we go,
* we check the entry before and after each entry.
* If either of the entries references a different block,
* check the sibling pointer. If there's a sibling
* pointer mismatch, try and extract as much data
* as possible.
*/
if (bno != 0 && verify_agbno(mp, agno, bno)) {
switch (magic) {
case XFS_ABTB_CRC_MAGIC:
case XFS_ABTB_MAGIC:
scan_sbtree(bno, level, agno, suspect,
scan_allocbt, 0, magic, priv,
&xfs_allocbt_buf_ops);
break;
case XFS_ABTC_CRC_MAGIC:
case XFS_ABTC_MAGIC:
scan_sbtree(bno, level, agno, suspect,
scan_allocbt, 0, magic, priv,
&xfs_allocbt_buf_ops);
break;
}
}
}
}
static int
scan_single_ino_chunk(
xfs_agnumber_t agno,
xfs_inobt_rec_t *rp,
int suspect)
{
xfs_ino_t lino;
xfs_agino_t ino;
xfs_agblock_t agbno;
int j;
int nfree;
int off;
int state;
ino_tree_node_t *ino_rec, *first_rec, *last_rec;
ino = be32_to_cpu(rp->ir_startino);
off = XFS_AGINO_TO_OFFSET(mp, ino);
agbno = XFS_AGINO_TO_AGBNO(mp, ino);
lino = XFS_AGINO_TO_INO(mp, agno, ino);
/*
* on multi-block block chunks, all chunks start
* at the beginning of the block. with multi-chunk
* blocks, all chunks must start on 64-inode boundaries
* since each block can hold N complete chunks. if
* fs has aligned inodes, all chunks must start
* at a fs_ino_alignment*N'th agbno. skip recs
* with badly aligned starting inodes.
*/
if (ino == 0 ||
(inodes_per_block <= XFS_INODES_PER_CHUNK && off != 0) ||
(inodes_per_block > XFS_INODES_PER_CHUNK &&
off % XFS_INODES_PER_CHUNK != 0) ||
(fs_aligned_inodes && fs_ino_alignment &&
agbno % fs_ino_alignment != 0)) {
do_warn(
_("badly aligned inode rec (starting inode = %" PRIu64 ")\n"),
lino);
suspect++;
}
/*
* verify numeric validity of inode chunk first
* before inserting into a tree. don't have to
* worry about the overflow case because the
* starting ino number of a chunk can only get
* within 255 inodes of max (NULLAGINO). if it
* gets closer, the agino number will be illegal
* as the agbno will be too large.
*/
if (verify_aginum(mp, agno, ino)) {
do_warn(
_("bad starting inode # (%" PRIu64 " (0x%x 0x%x)) in ino rec, skipping rec\n"),
lino, agno, ino);
return ++suspect;
}
if (verify_aginum(mp, agno,
ino + XFS_INODES_PER_CHUNK - 1)) {
do_warn(
_("bad ending inode # (%" PRIu64 " (0x%x 0x%zx)) in ino rec, skipping rec\n"),
lino + XFS_INODES_PER_CHUNK - 1,
agno,
ino + XFS_INODES_PER_CHUNK - 1);
return ++suspect;
}
/*
* set state of each block containing inodes
*/
if (off == 0 && !suspect) {
for (j = 0;
j < XFS_INODES_PER_CHUNK;
j += mp->m_sb.sb_inopblock) {
agbno = XFS_AGINO_TO_AGBNO(mp, ino + j);
state = get_bmap(agno, agbno);
if (state == XR_E_UNKNOWN) {
set_bmap(agno, agbno, XR_E_INO);
} else if (state == XR_E_INUSE_FS && agno == 0 &&
ino + j >= first_prealloc_ino &&
ino + j < last_prealloc_ino) {
set_bmap(agno, agbno, XR_E_INO);
} else {
do_warn(
_("inode chunk claims used block, inobt block - agno %d, bno %d, inopb %d\n"),
agno, agbno, mp->m_sb.sb_inopblock);
/*
* XXX - maybe should mark
* block a duplicate
*/
return ++suspect;
}
}
}
/*
* ensure only one avl entry per chunk
*/
find_inode_rec_range(mp, agno, ino, ino + XFS_INODES_PER_CHUNK,
&first_rec, &last_rec);
if (first_rec != NULL) {
/*
* this chunk overlaps with one (or more)
* already in the tree
*/
do_warn(
_("inode rec for ino %" PRIu64 " (%d/%d) overlaps existing rec (start %d/%d)\n"),
lino, agno, ino, agno, first_rec->ino_startnum);
suspect++;
/*
* if the 2 chunks start at the same place,
* then we don't have to put this one
* in the uncertain list. go to the next one.
*/
if (first_rec->ino_startnum == ino)
return suspect;
}
nfree = 0;
/*
* now mark all the inodes as existing and free or used.
* if the tree is suspect, put them into the uncertain
* inode tree.
*/
if (!suspect) {
if (XFS_INOBT_IS_FREE_DISK(rp, 0)) {
nfree++;
ino_rec = set_inode_free_alloc(mp, agno, ino);
} else {
ino_rec = set_inode_used_alloc(mp, agno, ino);
}
for (j = 1; j < XFS_INODES_PER_CHUNK; j++) {
if (XFS_INOBT_IS_FREE_DISK(rp, j)) {
nfree++;
set_inode_free(ino_rec, j);
} else {
set_inode_used(ino_rec, j);
}
}
} else {
for (j = 0; j < XFS_INODES_PER_CHUNK; j++) {
if (XFS_INOBT_IS_FREE_DISK(rp, j)) {
nfree++;
add_aginode_uncertain(mp, agno, ino + j, 1);
} else {
add_aginode_uncertain(mp, agno, ino + j, 0);
}
}
}
if (nfree != be32_to_cpu(rp->ir_freecount)) {
do_warn(_("ir_freecount/free mismatch, inode "
"chunk %d/%u, freecount %d nfree %d\n"),
agno, ino, be32_to_cpu(rp->ir_freecount), nfree);
}
return suspect;
}
static int
scan_single_finobt_chunk(
xfs_agnumber_t agno,
xfs_inobt_rec_t *rp,
int suspect)
{
xfs_ino_t lino;
xfs_agino_t ino;
xfs_agblock_t agbno;
int j;
int nfree;
int off;
int state;
ino_tree_node_t *first_rec, *last_rec, *ino_rec;
ino = be32_to_cpu(rp->ir_startino);
off = XFS_AGINO_TO_OFFSET(mp, ino);
agbno = XFS_AGINO_TO_AGBNO(mp, ino);
lino = XFS_AGINO_TO_INO(mp, agno, ino);
/*
* on multi-block block chunks, all chunks start at the beginning of the
* block. with multi-chunk blocks, all chunks must start on 64-inode
* boundaries since each block can hold N complete chunks. if fs has
* aligned inodes, all chunks must start at a fs_ino_alignment*N'th
* agbno. skip recs with badly aligned starting inodes.
*/
if (ino == 0 ||
(inodes_per_block <= XFS_INODES_PER_CHUNK && off != 0) ||
(inodes_per_block > XFS_INODES_PER_CHUNK &&
off % XFS_INODES_PER_CHUNK != 0) ||
(fs_aligned_inodes && fs_ino_alignment &&
agbno % fs_ino_alignment != 0)) {
do_warn(
_("badly aligned finobt inode rec (starting inode = %" PRIu64 ")\n"),
lino);
suspect++;
}
/*
* verify numeric validity of inode chunk first before inserting into a
* tree. don't have to worry about the overflow case because the
* starting ino number of a chunk can only get within 255 inodes of max
* (NULLAGINO). if it gets closer, the agino number will be illegal as
* the agbno will be too large.
*/
if (verify_aginum(mp, agno, ino)) {
do_warn(
_("bad starting inode # (%" PRIu64 " (0x%x 0x%x)) in finobt rec, skipping rec\n"),
lino, agno, ino);
return ++suspect;
}
if (verify_aginum(mp, agno,
ino + XFS_INODES_PER_CHUNK - 1)) {
do_warn(
_("bad ending inode # (%" PRIu64 " (0x%x 0x%zx)) in finobt rec, skipping rec\n"),
lino + XFS_INODES_PER_CHUNK - 1,
agno,
ino + XFS_INODES_PER_CHUNK - 1);
return ++suspect;
}
/*
* cross check state of each block containing inodes referenced by the
* finobt against what we have already scanned from the alloc inobt.
*/
if (off == 0 && !suspect) {
for (j = 0;
j < XFS_INODES_PER_CHUNK;
j += mp->m_sb.sb_inopblock) {
agbno = XFS_AGINO_TO_AGBNO(mp, ino + j);
state = get_bmap(agno, agbno);
if (state == XR_E_INO) {
continue;
} else if ((state == XR_E_UNKNOWN) ||
(state == XR_E_INUSE_FS && agno == 0 &&
ino + j >= first_prealloc_ino &&
ino + j < last_prealloc_ino)) {
do_warn(
_("inode chunk claims untracked block, finobt block - agno %d, bno %d, inopb %d\n"),
agno, agbno, mp->m_sb.sb_inopblock);
set_bmap(agno, agbno, XR_E_INO);
suspect++;
} else {
do_warn(
_("inode chunk claims used block, finobt block - agno %d, bno %d, inopb %d\n"),
agno, agbno, mp->m_sb.sb_inopblock);
return ++suspect;
}
}
}
/*
* ensure we have an incore entry for each chunk
*/
find_inode_rec_range(mp, agno, ino, ino + XFS_INODES_PER_CHUNK,
&first_rec, &last_rec);
if (first_rec) {
if (suspect)
return suspect;
/*
* verify consistency between finobt record and incore state
*/
if (first_rec->ino_startnum != ino) {
do_warn(
_("finobt rec for ino %" PRIu64 " (%d/%u) does not match existing rec (%d/%d)\n"),
lino, agno, ino, agno, first_rec->ino_startnum);
return ++suspect;
}
nfree = 0;
for (j = 0; j < XFS_INODES_PER_CHUNK; j++) {
int isfree = XFS_INOBT_IS_FREE_DISK(rp, j);
if (isfree)
nfree++;
/*
* inode allocation state should be consistent between
* the inobt and finobt
*/
if (!suspect &&
isfree != is_inode_free(first_rec, j))
suspect++;
}
goto check_freecount;
}
/*
* the finobt contains a record that the previous alloc inobt scan never
* found. insert the inodes into the appropriate tree.
*/
do_warn(_("undiscovered finobt record, ino %" PRIu64 " (%d/%u)\n"),
lino, agno, ino);
if (!suspect) {
/*
* inodes previously inserted into the uncertain tree should be
* superceded by these when the uncertain tree is processed
*/
nfree = 0;
if (XFS_INOBT_IS_FREE_DISK(rp, 0)) {
nfree++;
ino_rec = set_inode_free_alloc(mp, agno, ino);
} else {
ino_rec = set_inode_used_alloc(mp, agno, ino);
}
for (j = 1; j < XFS_INODES_PER_CHUNK; j++) {
if (XFS_INOBT_IS_FREE_DISK(rp, j)) {
nfree++;
set_inode_free(ino_rec, j);
} else {
set_inode_used(ino_rec, j);
}
}
} else {
/*
* this should handle the case where the inobt scan may have
* already added uncertain inodes
*/
nfree = 0;
for (j = 0; j < XFS_INODES_PER_CHUNK; j++) {
if (XFS_INOBT_IS_FREE_DISK(rp, j)) {
add_aginode_uncertain(mp, agno, ino + j, 1);
nfree++;
} else {
add_aginode_uncertain(mp, agno, ino + j, 0);
}
}
}
check_freecount:
/*
* Verify that the record freecount matches the actual number of free
* inodes counted in the record. Don't increment 'suspect' here, since
* we have already verified the allocation state of the individual
* inodes against the in-core state. This will have already incremented
* 'suspect' if something is wrong. If suspect hasn't been set at this
* point, these warnings mean that we have a simple freecount
* inconsistency or a stray finobt record (as opposed to a broader tree
* corruption). Issue a warning and continue the scan. The final btree
* reconstruction will correct this naturally.
*/
if (nfree != be32_to_cpu(rp->ir_freecount)) {
do_warn(
_("finobt ir_freecount/free mismatch, inode chunk %d/%u, freecount %d nfree %d\n"),
agno, ino, be32_to_cpu(rp->ir_freecount), nfree);
}
if (!nfree) {
do_warn(
_("finobt record with no free inodes, inode chunk %d/%u\n"), agno, ino);
}
return suspect;
}
/*
* this one walks the inode btrees sucking the info there into
* the incore avl tree. We try and rescue corrupted btree records
* to minimize our chances of losing inodes. Inode info from potentially
* corrupt sources could be bogus so rather than put the info straight
* into the tree, instead we put it on a list and try and verify the
* info in the next phase by examining what's on disk. At that point,
* we'll be able to figure out what's what and stick the corrected info
* into the tree. We do bail out at some point and give up on a subtree
* so as to avoid walking randomly all over the ag.
*
* Note that it's also ok if the free/inuse info wrong, we can correct
* that when we examine the on-disk inode. The important thing is to
* get the start and alignment of the inode chunks right. Those chunks
* that we aren't sure about go into the uncertain list.
*/
static void
scan_inobt(
struct xfs_btree_block *block,
int level,
xfs_agblock_t bno,
xfs_agnumber_t agno,
int suspect,
int isroot,
__uint32_t magic,
void *priv)
{
struct aghdr_cnts *agcnts = priv;
int i;
int numrecs;
int state;
xfs_inobt_ptr_t *pp;
xfs_inobt_rec_t *rp;
int hdr_errors;
hdr_errors = 0;
if (be32_to_cpu(block->bb_magic) != magic) {
do_warn(_("bad magic # %#x in inobt block %d/%d\n"),
be32_to_cpu(block->bb_magic), agno, bno);
hdr_errors++;
bad_ino_btree = 1;
if (suspect)
return;
}
if (be16_to_cpu(block->bb_level) != level) {
do_warn(_("expected level %d got %d in inobt block %d/%d\n"),
level, be16_to_cpu(block->bb_level), agno, bno);
hdr_errors++;
bad_ino_btree = 1;
if (suspect)
return;
}
/*
* check for btree blocks multiply claimed, any unknown/free state
* is ok in the bitmap block.
*/
state = get_bmap(agno, bno);
switch (state) {
case XR_E_UNKNOWN:
case XR_E_FREE1:
case XR_E_FREE:
set_bmap(agno, bno, XR_E_FS_MAP);
break;
default:
set_bmap(agno, bno, XR_E_MULT);
do_warn(
_("inode btree block claimed (state %d), agno %d, bno %d, suspect %d\n"),
state, agno, bno, suspect);
}
numrecs = be16_to_cpu(block->bb_numrecs);
/*
* leaf record in btree
*/
if (level == 0) {
/* check for trashed btree block */
if (numrecs > mp->m_inobt_mxr[0]) {
numrecs = mp->m_inobt_mxr[0];
hdr_errors++;
}
if (isroot == 0 && numrecs < mp->m_inobt_mnr[0]) {
numrecs = mp->m_inobt_mnr[0];
hdr_errors++;
}
if (hdr_errors) {
bad_ino_btree = 1;
do_warn(_("dubious inode btree block header %d/%d\n"),
agno, bno);
suspect++;
}
rp = XFS_INOBT_REC_ADDR(mp, block, 1);
/*
* step through the records, each record points to
* a chunk of inodes. The start of inode chunks should
* be block-aligned. Each inode btree rec should point
* to the start of a block of inodes or the start of a group
* of INODES_PER_CHUNK (64) inodes. off is the offset into
* the block. skip processing of bogus records.
*/
for (i = 0; i < numrecs; i++) {
if (magic == XFS_IBT_MAGIC ||
magic == XFS_IBT_CRC_MAGIC) {
agcnts->agicount += XFS_INODES_PER_CHUNK;
agcnts->icount += XFS_INODES_PER_CHUNK;
agcnts->agifreecount +=
be32_to_cpu(rp[i].ir_freecount);
agcnts->ifreecount +=
be32_to_cpu(rp[i].ir_freecount);
suspect = scan_single_ino_chunk(agno, &rp[i],
suspect);
} else {
/*
* the finobt tracks records with free inodes,
* so only the free inode count is expected to be
* consistent with the agi
*/
agcnts->fibtfreecount +=
be32_to_cpu(rp[i].ir_freecount);
suspect = scan_single_finobt_chunk(agno, &rp[i],
suspect);
}
}
if (suspect)
bad_ino_btree = 1;
return;
}
/*
* interior record, continue on
*/
if (numrecs > mp->m_inobt_mxr[1]) {
numrecs = mp->m_inobt_mxr[1];
hdr_errors++;
}
if (isroot == 0 && numrecs < mp->m_inobt_mnr[1]) {
numrecs = mp->m_inobt_mnr[1];
hdr_errors++;
}
pp = XFS_INOBT_PTR_ADDR(mp, block, 1, mp->m_inobt_mxr[1]);
/*
* don't pass bogus tree flag down further if this block
* looked ok. bail out if two levels in a row look bad.
*/
if (suspect && !hdr_errors)
suspect = 0;
if (hdr_errors) {
bad_ino_btree = 1;
if (suspect)
return;
else suspect++;
}
for (i = 0; i < numrecs; i++) {
if (be32_to_cpu(pp[i]) != 0 && verify_agbno(mp, agno,
be32_to_cpu(pp[i])))
scan_sbtree(be32_to_cpu(pp[i]), level, agno,
suspect, scan_inobt, 0, magic, priv,
&xfs_inobt_buf_ops);
}
}
static void
scan_freelist(
xfs_agf_t *agf,
struct aghdr_cnts *agcnts)
{
xfs_buf_t *agflbuf;
xfs_agnumber_t agno;
xfs_agblock_t bno;
int count;
int i;
__be32 *freelist;
agno = be32_to_cpu(agf->agf_seqno);
if (XFS_SB_BLOCK(mp) != XFS_AGFL_BLOCK(mp) &&
XFS_AGF_BLOCK(mp) != XFS_AGFL_BLOCK(mp) &&
XFS_AGI_BLOCK(mp) != XFS_AGFL_BLOCK(mp))
set_bmap(agno, XFS_AGFL_BLOCK(mp), XR_E_FS_MAP);
if (be32_to_cpu(agf->agf_flcount) == 0)
return;
agflbuf = libxfs_readbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
XFS_FSS_TO_BB(mp, 1), 0, &xfs_agfl_buf_ops);
if (!agflbuf) {
do_abort(_("can't read agfl block for ag %d\n"), agno);
return;
}
if (agflbuf->b_error == EFSBADCRC)
do_warn(_("agfl has bad CRC for ag %d\n"), agno);
freelist = XFS_BUF_TO_AGFL_BNO(mp, agflbuf);
i = be32_to_cpu(agf->agf_flfirst);
if (no_modify) {
/* agf values not fixed in verify_set_agf, so recheck */
if (be32_to_cpu(agf->agf_flfirst) >= XFS_AGFL_SIZE(mp) ||
be32_to_cpu(agf->agf_fllast) >= XFS_AGFL_SIZE(mp)) {
do_warn(_("agf %d freelist blocks bad, skipping "
"freelist scan\n"), i);
return;
}
}
count = 0;
for (;;) {
bno = be32_to_cpu(freelist[i]);
if (verify_agbno(mp, agno, bno))
set_bmap(agno, bno, XR_E_FREE);
else
do_warn(_("bad agbno %u in agfl, agno %d\n"),
bno, agno);
count++;
if (i == be32_to_cpu(agf->agf_fllast))
break;
if (++i == XFS_AGFL_SIZE(mp))
i = 0;
}
if (count != be32_to_cpu(agf->agf_flcount)) {
do_warn(_("freeblk count %d != flcount %d in ag %d\n"), count,
be32_to_cpu(agf->agf_flcount), agno);
}
agcnts->fdblocks += count;
libxfs_putbuf(agflbuf);
}
static void
validate_agf(
struct xfs_agf *agf,
xfs_agnumber_t agno,
struct aghdr_cnts *agcnts)
{
xfs_agblock_t bno;
__uint32_t magic;
bno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_BNO]);
if (bno != 0 && verify_agbno(mp, agno, bno)) {
magic = xfs_sb_version_hascrc(&mp->m_sb) ? XFS_ABTB_CRC_MAGIC
: XFS_ABTB_MAGIC;
scan_sbtree(bno, be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]),
agno, 0, scan_allocbt, 1, magic, agcnts,
&xfs_allocbt_buf_ops);
} else {
do_warn(_("bad agbno %u for btbno root, agno %d\n"),
bno, agno);
}
bno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_CNT]);
if (bno != 0 && verify_agbno(mp, agno, bno)) {
magic = xfs_sb_version_hascrc(&mp->m_sb) ? XFS_ABTC_CRC_MAGIC
: XFS_ABTC_MAGIC;
scan_sbtree(bno, be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]),
agno, 0, scan_allocbt, 1, magic, agcnts,
&xfs_allocbt_buf_ops);
} else {
do_warn(_("bad agbno %u for btbcnt root, agno %d\n"),
bno, agno);
}
if (be32_to_cpu(agf->agf_freeblks) != agcnts->agffreeblks) {
do_warn(_("agf_freeblks %u, counted %u in ag %u\n"),
be32_to_cpu(agf->agf_freeblks), agcnts->agffreeblks, agno);
}
if (be32_to_cpu(agf->agf_longest) != agcnts->agflongest) {
do_warn(_("agf_longest %u, counted %u in ag %u\n"),
be32_to_cpu(agf->agf_longest), agcnts->agflongest, agno);
}
if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
be32_to_cpu(agf->agf_btreeblks) != agcnts->agfbtreeblks) {
do_warn(_("agf_btreeblks %u, counted %" PRIu64 " in ag %u\n"),
be32_to_cpu(agf->agf_btreeblks), agcnts->agfbtreeblks, agno);
}
}
static void
validate_agi(
struct xfs_agi *agi,
xfs_agnumber_t agno,
struct aghdr_cnts *agcnts)
{
xfs_agblock_t bno;
int i;
__uint32_t magic;
bno = be32_to_cpu(agi->agi_root);
if (bno != 0 && verify_agbno(mp, agno, bno)) {
magic = xfs_sb_version_hascrc(&mp->m_sb) ? XFS_IBT_CRC_MAGIC
: XFS_IBT_MAGIC;
scan_sbtree(bno, be32_to_cpu(agi->agi_level),
agno, 0, scan_inobt, 1, magic, agcnts,
&xfs_inobt_buf_ops);
} else {
do_warn(_("bad agbno %u for inobt root, agno %d\n"),
be32_to_cpu(agi->agi_root), agno);
}
if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
bno = be32_to_cpu(agi->agi_free_root);
if (bno != 0 && verify_agbno(mp, agno, bno)) {
magic = xfs_sb_version_hascrc(&mp->m_sb) ?
XFS_FIBT_CRC_MAGIC : XFS_FIBT_MAGIC;
scan_sbtree(bno, be32_to_cpu(agi->agi_free_level),
agno, 0, scan_inobt, 1, magic, agcnts,
&xfs_inobt_buf_ops);
} else {
do_warn(_("bad agbno %u for finobt root, agno %d\n"),
be32_to_cpu(agi->agi_free_root), agno);
}
}
if (be32_to_cpu(agi->agi_count) != agcnts->agicount) {
do_warn(_("agi_count %u, counted %u in ag %u\n"),
be32_to_cpu(agi->agi_count), agcnts->agicount, agno);
}
if (be32_to_cpu(agi->agi_freecount) != agcnts->agifreecount) {
do_warn(_("agi_freecount %u, counted %u in ag %u\n"),
be32_to_cpu(agi->agi_freecount), agcnts->agifreecount, agno);
}
if (xfs_sb_version_hasfinobt(&mp->m_sb) &&
be32_to_cpu(agi->agi_freecount) != agcnts->fibtfreecount) {
do_warn(_("agi_freecount %u, counted %u in ag %u finobt\n"),
be32_to_cpu(agi->agi_freecount), agcnts->fibtfreecount,
agno);
}
for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) {
xfs_agino_t agino = be32_to_cpu(agi->agi_unlinked[i]);
if (agino != NULLAGINO) {
do_warn(
_("agi unlinked bucket %d is %u in ag %u (inode=%" PRIu64 ")\n"),
i, agino, agno,
XFS_AGINO_TO_INO(mp, agno, agino));
}
}
}
/*
* Scan an AG for obvious corruption.
*/
static void
scan_ag(
work_queue_t *wq,
xfs_agnumber_t agno,
void *arg)
{
struct aghdr_cnts *agcnts = arg;
struct xfs_agf *agf;
struct xfs_buf *agfbuf = NULL;
int agf_dirty = 0;
struct xfs_agi *agi;
struct xfs_buf *agibuf = NULL;
int agi_dirty = 0;
struct xfs_sb *sb = NULL;
struct xfs_buf *sbbuf = NULL;
int sb_dirty = 0;
int status;
char *objname = NULL;
sb = (struct xfs_sb *)calloc(BBTOB(XFS_FSS_TO_BB(mp, 1)), 1);
if (!sb) {
do_error(_("can't allocate memory for superblock\n"));
return;
}
sbbuf = libxfs_readbuf(mp->m_dev, XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
XFS_FSS_TO_BB(mp, 1), 0, &xfs_sb_buf_ops);
if (!sbbuf) {
objname = _("root superblock");
goto out_free_sb;
}
libxfs_sb_from_disk(sb, XFS_BUF_TO_SBP(sbbuf));
libxfs_sb_quota_from_disk(sb);
agfbuf = libxfs_readbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
XFS_FSS_TO_BB(mp, 1), 0, &xfs_agf_buf_ops);
if (!agfbuf) {
objname = _("agf block");
goto out_free_sbbuf;
}
agf = XFS_BUF_TO_AGF(agfbuf);
agibuf = libxfs_readbuf(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
XFS_FSS_TO_BB(mp, 1), 0, &xfs_agi_buf_ops);
if (!agibuf) {
objname = _("agi block");
goto out_free_agfbuf;
}
agi = XFS_BUF_TO_AGI(agibuf);
/* fix up bad ag headers */
status = verify_set_agheader(mp, sbbuf, sb, agf, agi, agno);
if (status & XR_AG_SB_SEC) {
if (!no_modify)
sb_dirty = 1;
/*
* clear bad sector bit because we don't want
* to skip further processing. we just want to
* ensure that we write out the modified sb buffer.
*/
status &= ~XR_AG_SB_SEC;
}
if (status & XR_AG_SB) {
if (!no_modify) {
do_warn(_("reset bad sb for ag %d\n"), agno);
sb_dirty = 1;
} else {
do_warn(_("would reset bad sb for ag %d\n"), agno);
}
}
if (status & XR_AG_AGF) {
if (!no_modify) {
do_warn(_("reset bad agf for ag %d\n"), agno);
agf_dirty = 1;
} else {
do_warn(_("would reset bad agf for ag %d\n"), agno);
}
}
if (status & XR_AG_AGI) {
if (!no_modify) {
do_warn(_("reset bad agi for ag %d\n"), agno);
agi_dirty = 1;
} else {
do_warn(_("would reset bad agi for ag %d\n"), agno);
}
}
if (status && no_modify) {
do_warn(_("bad uncorrected agheader %d, skipping ag...\n"),
agno);
goto out_free_agibuf;
}
scan_freelist(agf, agcnts);
validate_agf(agf, agno, agcnts);
validate_agi(agi, agno, agcnts);
ASSERT(agi_dirty == 0 || (agi_dirty && !no_modify));
ASSERT(agf_dirty == 0 || (agf_dirty && !no_modify));
ASSERT(sb_dirty == 0 || (sb_dirty && !no_modify));
/*
* Only pay attention to CRC/verifier errors if we can correct them.
* Note that we can get uncorrected EFSCORRUPTED errors here because
* the verifier will flag on out of range values that we can't correct
* until phase 5 when we have all the information necessary to rebuild
* the freespace/inode btrees. We can correct bad CRC errors
* immediately, though.
*/
if (!no_modify) {
agi_dirty += (agibuf->b_error == EFSBADCRC);
agf_dirty += (agfbuf->b_error == EFSBADCRC);
sb_dirty += (sbbuf->b_error == EFSBADCRC);
}
if (agi_dirty && !no_modify)
libxfs_writebuf(agibuf, 0);
else
libxfs_putbuf(agibuf);
if (agf_dirty && !no_modify)
libxfs_writebuf(agfbuf, 0);
else
libxfs_putbuf(agfbuf);
if (sb_dirty && !no_modify) {
if (agno == 0)
memcpy(&mp->m_sb, sb, sizeof(xfs_sb_t));
libxfs_sb_to_disk(XFS_BUF_TO_SBP(sbbuf), sb);
libxfs_writebuf(sbbuf, 0);
} else
libxfs_putbuf(sbbuf);
free(sb);
PROG_RPT_INC(prog_rpt_done[agno], 1);
#ifdef XR_INODE_TRACE
print_inode_list(i);
#endif
return;
out_free_agibuf:
libxfs_putbuf(agibuf);
out_free_agfbuf:
libxfs_putbuf(agfbuf);
out_free_sbbuf:
libxfs_putbuf(sbbuf);
out_free_sb:
free(sb);
if (objname)
do_error(_("can't get %s for ag %d\n"), objname, agno);
}
#define SCAN_THREADS 32
void
scan_ags(
struct xfs_mount *mp,
int scan_threads)
{
struct aghdr_cnts *agcnts;
__uint64_t fdblocks = 0;
__uint64_t icount = 0;
__uint64_t ifreecount = 0;
xfs_agnumber_t i;
work_queue_t wq;
agcnts = malloc(mp->m_sb.sb_agcount * sizeof(*agcnts));
if (!agcnts) {
do_abort(_("no memory for ag header counts\n"));
return;
}
memset(agcnts, 0, mp->m_sb.sb_agcount * sizeof(*agcnts));
create_work_queue(&wq, mp, scan_threads);
for (i = 0; i < mp->m_sb.sb_agcount; i++)
queue_work(&wq, scan_ag, i, &agcnts[i]);
destroy_work_queue(&wq);
/* tally up the counts */
for (i = 0; i < mp->m_sb.sb_agcount; i++) {
fdblocks += agcnts[i].fdblocks;
icount += agcnts[i].icount;
ifreecount += agcnts[i].ifreecount;
}
free(agcnts);
/*
* Validate that our manual counts match the superblock.
*/
if (mp->m_sb.sb_icount != icount) {
do_warn(_("sb_icount %" PRIu64 ", counted %" PRIu64 "\n"),
mp->m_sb.sb_icount, icount);
}
if (mp->m_sb.sb_ifree != ifreecount) {
do_warn(_("sb_ifree %" PRIu64 ", counted %" PRIu64 "\n"),
mp->m_sb.sb_ifree, ifreecount);
}
if (mp->m_sb.sb_fdblocks != fdblocks) {
do_warn(_("sb_fdblocks %" PRIu64 ", counted %" PRIu64 "\n"),
mp->m_sb.sb_fdblocks, fdblocks);
}
}