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0b61f8a407
linux-brain/fs/xfs/scrub/agheader.c
Dave Chinner 0b61f8a407 xfs: convert to SPDX license tags 
Remove the verbose license text from XFS files and replace them
with SPDX tags. This does not change the license of any of the code,
merely refers to the common, up-to-date license files in LICENSES/

This change was mostly scripted. fs/xfs/Makefile and
fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected
and modified by the following command:

for f in `git grep -l "GNU General" fs/xfs/` ; do
	echo $f
	cat $f | awk -f hdr.awk > $f.new
	mv -f $f.new $f
done

And the hdr.awk script that did the modification (including
detecting the difference between GPL-2.0 and GPL-2.0+ licenses)
is as follows:

$ cat hdr.awk
BEGIN {
	hdr = 1.0
	tag = "GPL-2.0"
	str = ""
}

/^ \* This program is free software/ {
	hdr = 2.0;
	next
}

/any later version./ {
	tag = "GPL-2.0+"
	next
}

/^ \*\// {
	if (hdr > 0.0) {
		print "// SPDX-License-Identifier: " tag
		print str
		print $0
		str=""
		hdr = 0.0
		next
	}
	print $0
	next
}

/^ \* / {
	if (hdr > 1.0)
		next
	if (hdr > 0.0) {
		if (str != "")
			str = str "\n"
		str = str $0
		next
	}
	print $0
	next
}

/^ \*/ {
	if (hdr > 0.0)
		next
	print $0
	next
}

// {
	if (hdr > 0.0) {
		if (str != "")
			str = str "\n"
		str = str $0
		next
	}
	print $0
}

END { }
$

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-06 14:17:53 -07:00

901 lines
25 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_defer.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_inode.h"
#include "xfs_alloc.h"
#include "xfs_ialloc.h"
#include "xfs_rmap.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
/* Superblock */
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_superblock_xref(
struct xfs_scrub_context *sc,
struct xfs_buf *bp)
{
struct xfs_owner_info oinfo;
struct xfs_mount *mp = sc->mp;
xfs_agnumber_t agno = sc->sm->sm_agno;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_SB_BLOCK(mp);
error = xfs_scrub_ag_init(sc, agno, &sc->sa);
if (!xfs_scrub_xref_process_error(sc, agno, agbno, &error))
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
xfs_scrub_xref_is_not_shared(sc, agbno, 1);
/* scrub teardown will take care of sc->sa for us */
}
/*
* Scrub the filesystem superblock.
*
* Note: We do /not/ attempt to check AG 0's superblock. Mount is
* responsible for validating all the geometry information in sb 0, so
* if the filesystem is capable of initiating online scrub, then clearly
* sb 0 is ok and we can use its information to check everything else.
*/
int
xfs_scrub_superblock(
struct xfs_scrub_context *sc)
{
struct xfs_mount *mp = sc->mp;
struct xfs_buf *bp;
struct xfs_dsb *sb;
xfs_agnumber_t agno;
uint32_t v2_ok;
__be32 features_mask;
int error;
__be16 vernum_mask;
agno = sc->sm->sm_agno;
if (agno == 0)
return 0;
error = xfs_sb_read_secondary(mp, sc->tp, agno, &bp);
/*
* The superblock verifier can return several different error codes
* if it thinks the superblock doesn't look right. For a mount these
* would all get bounced back to userspace, but if we're here then the
* fs mounted successfully, which means that this secondary superblock
* is simply incorrect. Treat all these codes the same way we treat
* any corruption.
*/
switch (error) {
case -EINVAL: /* also -EWRONGFS */
case -ENOSYS:
case -EFBIG:
error = -EFSCORRUPTED;
default:
break;
}
if (!xfs_scrub_process_error(sc, agno, XFS_SB_BLOCK(mp), &error))
return error;
sb = XFS_BUF_TO_SBP(bp);
/*
* Verify the geometries match. Fields that are permanently
* set by mkfs are checked; fields that can be updated later
* (and are not propagated to backup superblocks) are preen
* checked.
*/
if (sb->sb_blocksize != cpu_to_be32(mp->m_sb.sb_blocksize))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_dblocks != cpu_to_be64(mp->m_sb.sb_dblocks))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_rblocks != cpu_to_be64(mp->m_sb.sb_rblocks))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_rextents != cpu_to_be64(mp->m_sb.sb_rextents))
xfs_scrub_block_set_corrupt(sc, bp);
if (!uuid_equal(&sb->sb_uuid, &mp->m_sb.sb_uuid))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_logstart != cpu_to_be64(mp->m_sb.sb_logstart))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_rootino != cpu_to_be64(mp->m_sb.sb_rootino))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_rbmino != cpu_to_be64(mp->m_sb.sb_rbmino))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_rsumino != cpu_to_be64(mp->m_sb.sb_rsumino))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_rextsize != cpu_to_be32(mp->m_sb.sb_rextsize))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_agblocks != cpu_to_be32(mp->m_sb.sb_agblocks))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_agcount != cpu_to_be32(mp->m_sb.sb_agcount))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_rbmblocks != cpu_to_be32(mp->m_sb.sb_rbmblocks))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_logblocks != cpu_to_be32(mp->m_sb.sb_logblocks))
xfs_scrub_block_set_corrupt(sc, bp);
/* Check sb_versionnum bits that are set at mkfs time. */
vernum_mask = cpu_to_be16(~XFS_SB_VERSION_OKBITS |
XFS_SB_VERSION_NUMBITS |
XFS_SB_VERSION_ALIGNBIT |
XFS_SB_VERSION_DALIGNBIT |
XFS_SB_VERSION_SHAREDBIT |
XFS_SB_VERSION_LOGV2BIT |
XFS_SB_VERSION_SECTORBIT |
XFS_SB_VERSION_EXTFLGBIT |
XFS_SB_VERSION_DIRV2BIT);
if ((sb->sb_versionnum & vernum_mask) !=
(cpu_to_be16(mp->m_sb.sb_versionnum) & vernum_mask))
xfs_scrub_block_set_corrupt(sc, bp);
/* Check sb_versionnum bits that can be set after mkfs time. */
vernum_mask = cpu_to_be16(XFS_SB_VERSION_ATTRBIT |
XFS_SB_VERSION_NLINKBIT |
XFS_SB_VERSION_QUOTABIT);
if ((sb->sb_versionnum & vernum_mask) !=
(cpu_to_be16(mp->m_sb.sb_versionnum) & vernum_mask))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_sectsize != cpu_to_be16(mp->m_sb.sb_sectsize))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_inodesize != cpu_to_be16(mp->m_sb.sb_inodesize))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_inopblock != cpu_to_be16(mp->m_sb.sb_inopblock))
xfs_scrub_block_set_corrupt(sc, bp);
if (memcmp(sb->sb_fname, mp->m_sb.sb_fname, sizeof(sb->sb_fname)))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_blocklog != mp->m_sb.sb_blocklog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_sectlog != mp->m_sb.sb_sectlog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_inodelog != mp->m_sb.sb_inodelog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_inopblog != mp->m_sb.sb_inopblog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_agblklog != mp->m_sb.sb_agblklog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_rextslog != mp->m_sb.sb_rextslog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_imax_pct != mp->m_sb.sb_imax_pct)
xfs_scrub_block_set_preen(sc, bp);
/*
* Skip the summary counters since we track them in memory anyway.
* sb_icount, sb_ifree, sb_fdblocks, sb_frexents
*/
if (sb->sb_uquotino != cpu_to_be64(mp->m_sb.sb_uquotino))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_gquotino != cpu_to_be64(mp->m_sb.sb_gquotino))
xfs_scrub_block_set_preen(sc, bp);
/*
* Skip the quota flags since repair will force quotacheck.
* sb_qflags
*/
if (sb->sb_flags != mp->m_sb.sb_flags)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_shared_vn != mp->m_sb.sb_shared_vn)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_inoalignmt != cpu_to_be32(mp->m_sb.sb_inoalignmt))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_unit != cpu_to_be32(mp->m_sb.sb_unit))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_width != cpu_to_be32(mp->m_sb.sb_width))
xfs_scrub_block_set_preen(sc, bp);
if (sb->sb_dirblklog != mp->m_sb.sb_dirblklog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_logsectlog != mp->m_sb.sb_logsectlog)
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_logsectsize != cpu_to_be16(mp->m_sb.sb_logsectsize))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_logsunit != cpu_to_be32(mp->m_sb.sb_logsunit))
xfs_scrub_block_set_corrupt(sc, bp);
/* Do we see any invalid bits in sb_features2? */
if (!xfs_sb_version_hasmorebits(&mp->m_sb)) {
if (sb->sb_features2 != 0)
xfs_scrub_block_set_corrupt(sc, bp);
} else {
v2_ok = XFS_SB_VERSION2_OKBITS;
if (XFS_SB_VERSION_NUM(&mp->m_sb) >= XFS_SB_VERSION_5)
v2_ok |= XFS_SB_VERSION2_CRCBIT;
if (!!(sb->sb_features2 & cpu_to_be32(~v2_ok)))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_features2 != sb->sb_bad_features2)
xfs_scrub_block_set_preen(sc, bp);
}
/* Check sb_features2 flags that are set at mkfs time. */
features_mask = cpu_to_be32(XFS_SB_VERSION2_LAZYSBCOUNTBIT |
XFS_SB_VERSION2_PROJID32BIT |
XFS_SB_VERSION2_CRCBIT |
XFS_SB_VERSION2_FTYPE);
if ((sb->sb_features2 & features_mask) !=
(cpu_to_be32(mp->m_sb.sb_features2) & features_mask))
xfs_scrub_block_set_corrupt(sc, bp);
/* Check sb_features2 flags that can be set after mkfs time. */
features_mask = cpu_to_be32(XFS_SB_VERSION2_ATTR2BIT);
if ((sb->sb_features2 & features_mask) !=
(cpu_to_be32(mp->m_sb.sb_features2) & features_mask))
xfs_scrub_block_set_corrupt(sc, bp);
if (!xfs_sb_version_hascrc(&mp->m_sb)) {
/* all v5 fields must be zero */
if (memchr_inv(&sb->sb_features_compat, 0,
sizeof(struct xfs_dsb) -
offsetof(struct xfs_dsb, sb_features_compat)))
xfs_scrub_block_set_corrupt(sc, bp);
} else {
/* Check compat flags; all are set at mkfs time. */
features_mask = cpu_to_be32(XFS_SB_FEAT_COMPAT_UNKNOWN);
if ((sb->sb_features_compat & features_mask) !=
(cpu_to_be32(mp->m_sb.sb_features_compat) & features_mask))
xfs_scrub_block_set_corrupt(sc, bp);
/* Check ro compat flags; all are set at mkfs time. */
features_mask = cpu_to_be32(XFS_SB_FEAT_RO_COMPAT_UNKNOWN |
XFS_SB_FEAT_RO_COMPAT_FINOBT |
XFS_SB_FEAT_RO_COMPAT_RMAPBT |
XFS_SB_FEAT_RO_COMPAT_REFLINK);
if ((sb->sb_features_ro_compat & features_mask) !=
(cpu_to_be32(mp->m_sb.sb_features_ro_compat) &
features_mask))
xfs_scrub_block_set_corrupt(sc, bp);
/* Check incompat flags; all are set at mkfs time. */
features_mask = cpu_to_be32(XFS_SB_FEAT_INCOMPAT_UNKNOWN |
XFS_SB_FEAT_INCOMPAT_FTYPE |
XFS_SB_FEAT_INCOMPAT_SPINODES |
XFS_SB_FEAT_INCOMPAT_META_UUID);
if ((sb->sb_features_incompat & features_mask) !=
(cpu_to_be32(mp->m_sb.sb_features_incompat) &
features_mask))
xfs_scrub_block_set_corrupt(sc, bp);
/* Check log incompat flags; all are set at mkfs time. */
features_mask = cpu_to_be32(XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN);
if ((sb->sb_features_log_incompat & features_mask) !=
(cpu_to_be32(mp->m_sb.sb_features_log_incompat) &
features_mask))
xfs_scrub_block_set_corrupt(sc, bp);
/* Don't care about sb_crc */
if (sb->sb_spino_align != cpu_to_be32(mp->m_sb.sb_spino_align))
xfs_scrub_block_set_corrupt(sc, bp);
if (sb->sb_pquotino != cpu_to_be64(mp->m_sb.sb_pquotino))
xfs_scrub_block_set_preen(sc, bp);
/* Don't care about sb_lsn */
}
if (xfs_sb_version_hasmetauuid(&mp->m_sb)) {
/* The metadata UUID must be the same for all supers */
if (!uuid_equal(&sb->sb_meta_uuid, &mp->m_sb.sb_meta_uuid))
xfs_scrub_block_set_corrupt(sc, bp);
}
/* Everything else must be zero. */
if (memchr_inv(sb + 1, 0,
BBTOB(bp->b_length) - sizeof(struct xfs_dsb)))
xfs_scrub_block_set_corrupt(sc, bp);
xfs_scrub_superblock_xref(sc, bp);
return error;
}
/* AGF */
/* Tally freespace record lengths. */
STATIC int
xfs_scrub_agf_record_bno_lengths(
struct xfs_btree_cur *cur,
struct xfs_alloc_rec_incore *rec,
void *priv)
{
xfs_extlen_t *blocks = priv;
(*blocks) += rec->ar_blockcount;
return 0;
}
/* Check agf_freeblks */
static inline void
xfs_scrub_agf_xref_freeblks(
struct xfs_scrub_context *sc)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
xfs_extlen_t blocks = 0;
int error;
if (!sc->sa.bno_cur)
return;
error = xfs_alloc_query_all(sc->sa.bno_cur,
xfs_scrub_agf_record_bno_lengths, &blocks);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur))
return;
if (blocks != be32_to_cpu(agf->agf_freeblks))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Cross reference the AGF with the cntbt (freespace by length btree) */
static inline void
xfs_scrub_agf_xref_cntbt(
struct xfs_scrub_context *sc)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
xfs_agblock_t agbno;
xfs_extlen_t blocks;
int have;
int error;
if (!sc->sa.cnt_cur)
return;
/* Any freespace at all? */
error = xfs_alloc_lookup_le(sc->sa.cnt_cur, 0, -1U, &have);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.cnt_cur))
return;
if (!have) {
if (agf->agf_freeblks != be32_to_cpu(0))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
return;
}
/* Check agf_longest */
error = xfs_alloc_get_rec(sc->sa.cnt_cur, &agbno, &blocks, &have);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.cnt_cur))
return;
if (!have || blocks != be32_to_cpu(agf->agf_longest))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Check the btree block counts in the AGF against the btrees. */
STATIC void
xfs_scrub_agf_xref_btreeblks(
struct xfs_scrub_context *sc)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
struct xfs_mount *mp = sc->mp;
xfs_agblock_t blocks;
xfs_agblock_t btreeblks;
int error;
/* Check agf_rmap_blocks; set up for agf_btreeblks check */
if (sc->sa.rmap_cur) {
error = xfs_btree_count_blocks(sc->sa.rmap_cur, &blocks);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.rmap_cur))
return;
btreeblks = blocks - 1;
if (blocks != be32_to_cpu(agf->agf_rmap_blocks))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
} else {
btreeblks = 0;
}
/*
* No rmap cursor; we can't xref if we have the rmapbt feature.
* We also can't do it if we're missing the free space btree cursors.
*/
if ((xfs_sb_version_hasrmapbt(&mp->m_sb) && !sc->sa.rmap_cur) ||
!sc->sa.bno_cur || !sc->sa.cnt_cur)
return;
/* Check agf_btreeblks */
error = xfs_btree_count_blocks(sc->sa.bno_cur, &blocks);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.bno_cur))
return;
btreeblks += blocks - 1;
error = xfs_btree_count_blocks(sc->sa.cnt_cur, &blocks);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.cnt_cur))
return;
btreeblks += blocks - 1;
if (btreeblks != be32_to_cpu(agf->agf_btreeblks))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Check agf_refcount_blocks against tree size */
static inline void
xfs_scrub_agf_xref_refcblks(
struct xfs_scrub_context *sc)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
xfs_agblock_t blocks;
int error;
if (!sc->sa.refc_cur)
return;
error = xfs_btree_count_blocks(sc->sa.refc_cur, &blocks);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.refc_cur))
return;
if (blocks != be32_to_cpu(agf->agf_refcount_blocks))
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agf_xref(
struct xfs_scrub_context *sc)
{
struct xfs_owner_info oinfo;
struct xfs_mount *mp = sc->mp;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_AGF_BLOCK(mp);
error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
if (error)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_agf_xref_freeblks(sc);
xfs_scrub_agf_xref_cntbt(sc);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
xfs_scrub_agf_xref_btreeblks(sc);
xfs_scrub_xref_is_not_shared(sc, agbno, 1);
xfs_scrub_agf_xref_refcblks(sc);
/* scrub teardown will take care of sc->sa for us */
}
/* Scrub the AGF. */
int
xfs_scrub_agf(
struct xfs_scrub_context *sc)
{
struct xfs_mount *mp = sc->mp;
struct xfs_agf *agf;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_agblock_t eoag;
xfs_agblock_t agfl_first;
xfs_agblock_t agfl_last;
xfs_agblock_t agfl_count;
xfs_agblock_t fl_count;
int level;
int error = 0;
agno = sc->sa.agno = sc->sm->sm_agno;
error = xfs_scrub_ag_read_headers(sc, agno, &sc->sa.agi_bp,
&sc->sa.agf_bp, &sc->sa.agfl_bp);
if (!xfs_scrub_process_error(sc, agno, XFS_AGF_BLOCK(sc->mp), &error))
goto out;
xfs_scrub_buffer_recheck(sc, sc->sa.agf_bp);
agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
/* Check the AG length */
eoag = be32_to_cpu(agf->agf_length);
if (eoag != xfs_ag_block_count(mp, agno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
/* Check the AGF btree roots and levels */
agbno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_BNO]);
if (!xfs_verify_agbno(mp, agno, agbno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
agbno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_CNT]);
if (!xfs_verify_agbno(mp, agno, agbno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
level = be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]);
if (level <= 0 || level > XFS_BTREE_MAXLEVELS)
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
level = be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]);
if (level <= 0 || level > XFS_BTREE_MAXLEVELS)
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
agbno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_RMAP]);
if (!xfs_verify_agbno(mp, agno, agbno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
level = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]);
if (level <= 0 || level > XFS_BTREE_MAXLEVELS)
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
}
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
agbno = be32_to_cpu(agf->agf_refcount_root);
if (!xfs_verify_agbno(mp, agno, agbno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
level = be32_to_cpu(agf->agf_refcount_level);
if (level <= 0 || level > XFS_BTREE_MAXLEVELS)
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
}
/* Check the AGFL counters */
agfl_first = be32_to_cpu(agf->agf_flfirst);
agfl_last = be32_to_cpu(agf->agf_fllast);
agfl_count = be32_to_cpu(agf->agf_flcount);
if (agfl_last > agfl_first)
fl_count = agfl_last - agfl_first + 1;
else
fl_count = xfs_agfl_size(mp) - agfl_first + agfl_last + 1;
if (agfl_count != 0 && fl_count != agfl_count)
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
xfs_scrub_agf_xref(sc);
out:
return error;
}
/* AGFL */
struct xfs_scrub_agfl_info {
struct xfs_owner_info oinfo;
unsigned int sz_entries;
unsigned int nr_entries;
xfs_agblock_t *entries;
struct xfs_scrub_context *sc;
};
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agfl_block_xref(
struct xfs_scrub_context *sc,
xfs_agblock_t agbno,
struct xfs_owner_info *oinfo)
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, oinfo);
xfs_scrub_xref_is_not_shared(sc, agbno, 1);
}
/* Scrub an AGFL block. */
STATIC int
xfs_scrub_agfl_block(
struct xfs_mount *mp,
xfs_agblock_t agbno,
void *priv)
{
struct xfs_scrub_agfl_info *sai = priv;
struct xfs_scrub_context *sc = sai->sc;
xfs_agnumber_t agno = sc->sa.agno;
if (xfs_verify_agbno(mp, agno, agbno) &&
sai->nr_entries < sai->sz_entries)
sai->entries[sai->nr_entries++] = agbno;
else
xfs_scrub_block_set_corrupt(sc, sc->sa.agfl_bp);
xfs_scrub_agfl_block_xref(sc, agbno, priv);
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return XFS_BTREE_QUERY_RANGE_ABORT;
return 0;
}
static int
xfs_scrub_agblock_cmp(
const void *pa,
const void *pb)
{
const xfs_agblock_t *a = pa;
const xfs_agblock_t *b = pb;
return (int)*a - (int)*b;
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agfl_xref(
struct xfs_scrub_context *sc)
{
struct xfs_owner_info oinfo;
struct xfs_mount *mp = sc->mp;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_AGFL_BLOCK(mp);
error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
if (error)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
xfs_scrub_xref_is_not_shared(sc, agbno, 1);
/*
* Scrub teardown will take care of sc->sa for us. Leave sc->sa
* active so that the agfl block xref can use it too.
*/
}
/* Scrub the AGFL. */
int
xfs_scrub_agfl(
struct xfs_scrub_context *sc)
{
struct xfs_scrub_agfl_info sai;
struct xfs_agf *agf;
xfs_agnumber_t agno;
unsigned int agflcount;
unsigned int i;
int error;
agno = sc->sa.agno = sc->sm->sm_agno;
error = xfs_scrub_ag_read_headers(sc, agno, &sc->sa.agi_bp,
&sc->sa.agf_bp, &sc->sa.agfl_bp);
if (!xfs_scrub_process_error(sc, agno, XFS_AGFL_BLOCK(sc->mp), &error))
goto out;
if (!sc->sa.agf_bp)
return -EFSCORRUPTED;
xfs_scrub_buffer_recheck(sc, sc->sa.agfl_bp);
xfs_scrub_agfl_xref(sc);
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
goto out;
/* Allocate buffer to ensure uniqueness of AGFL entries. */
agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
agflcount = be32_to_cpu(agf->agf_flcount);
if (agflcount > xfs_agfl_size(sc->mp)) {
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
goto out;
}
memset(&sai, 0, sizeof(sai));
sai.sc = sc;
sai.sz_entries = agflcount;
sai.entries = kmem_zalloc(sizeof(xfs_agblock_t) * agflcount,
KM_MAYFAIL);
if (!sai.entries) {
error = -ENOMEM;
goto out;
}
/* Check the blocks in the AGFL. */
xfs_rmap_ag_owner(&sai.oinfo, XFS_RMAP_OWN_AG);
error = xfs_agfl_walk(sc->mp, XFS_BUF_TO_AGF(sc->sa.agf_bp),
sc->sa.agfl_bp, xfs_scrub_agfl_block, &sai);
if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
error = 0;
goto out_free;
}
if (error)
goto out_free;
if (agflcount != sai.nr_entries) {
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
goto out_free;
}
/* Sort entries, check for duplicates. */
sort(sai.entries, sai.nr_entries, sizeof(sai.entries[0]),
xfs_scrub_agblock_cmp, NULL);
for (i = 1; i < sai.nr_entries; i++) {
if (sai.entries[i] == sai.entries[i - 1]) {
xfs_scrub_block_set_corrupt(sc, sc->sa.agf_bp);
break;
}
}
out_free:
kmem_free(sai.entries);
out:
return error;
}
/* AGI */
/* Check agi_count/agi_freecount */
static inline void
xfs_scrub_agi_xref_icounts(
struct xfs_scrub_context *sc)
{
struct xfs_agi *agi = XFS_BUF_TO_AGI(sc->sa.agi_bp);
xfs_agino_t icount;
xfs_agino_t freecount;
int error;
if (!sc->sa.ino_cur)
return;
error = xfs_ialloc_count_inodes(sc->sa.ino_cur, &icount, &freecount);
if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.ino_cur))
return;
if (be32_to_cpu(agi->agi_count) != icount ||
be32_to_cpu(agi->agi_freecount) != freecount)
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agi_bp);
}
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agi_xref(
struct xfs_scrub_context *sc)
{
struct xfs_owner_info oinfo;
struct xfs_mount *mp = sc->mp;
xfs_agblock_t agbno;
int error;
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
agbno = XFS_AGI_BLOCK(mp);
error = xfs_scrub_ag_btcur_init(sc, &sc->sa);
if (error)
return;
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_scrub_agi_xref_icounts(sc);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
xfs_scrub_xref_is_not_shared(sc, agbno, 1);
/* scrub teardown will take care of sc->sa for us */
}
/* Scrub the AGI. */
int
xfs_scrub_agi(
struct xfs_scrub_context *sc)
{
struct xfs_mount *mp = sc->mp;
struct xfs_agi *agi;
xfs_agnumber_t agno;
xfs_agblock_t agbno;
xfs_agblock_t eoag;
xfs_agino_t agino;
xfs_agino_t first_agino;
xfs_agino_t last_agino;
xfs_agino_t icount;
int i;
int level;
int error = 0;
agno = sc->sa.agno = sc->sm->sm_agno;
error = xfs_scrub_ag_read_headers(sc, agno, &sc->sa.agi_bp,
&sc->sa.agf_bp, &sc->sa.agfl_bp);
if (!xfs_scrub_process_error(sc, agno, XFS_AGI_BLOCK(sc->mp), &error))
goto out;
xfs_scrub_buffer_recheck(sc, sc->sa.agi_bp);
agi = XFS_BUF_TO_AGI(sc->sa.agi_bp);
/* Check the AG length */
eoag = be32_to_cpu(agi->agi_length);
if (eoag != xfs_ag_block_count(mp, agno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
/* Check btree roots and levels */
agbno = be32_to_cpu(agi->agi_root);
if (!xfs_verify_agbno(mp, agno, agbno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
level = be32_to_cpu(agi->agi_level);
if (level <= 0 || level > XFS_BTREE_MAXLEVELS)
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
agbno = be32_to_cpu(agi->agi_free_root);
if (!xfs_verify_agbno(mp, agno, agbno))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
level = be32_to_cpu(agi->agi_free_level);
if (level <= 0 || level > XFS_BTREE_MAXLEVELS)
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
}
/* Check inode counters */
xfs_ialloc_agino_range(mp, agno, &first_agino, &last_agino);
icount = be32_to_cpu(agi->agi_count);
if (icount > last_agino - first_agino + 1 ||
icount < be32_to_cpu(agi->agi_freecount))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
/* Check inode pointers */
agino = be32_to_cpu(agi->agi_newino);
if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
agino = be32_to_cpu(agi->agi_dirino);
if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
/* Check unlinked inode buckets */
for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) {
agino = be32_to_cpu(agi->agi_unlinked[i]);
if (agino == NULLAGINO)
continue;
if (!xfs_verify_agino(mp, agno, agino))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
}
if (agi->agi_pad32 != cpu_to_be32(0))
xfs_scrub_block_set_corrupt(sc, sc->sa.agi_bp);
xfs_scrub_agi_xref(sc);
out:
return error;
}
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