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xfs: have buffer verifier functions report failing address

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Modify each function that checks the contents of a metadata buffer to
return the instruction address of the failing test so that we can report
more precise failure errors to the log.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-01-08 10:51:03 -08:00
parent 31ca03c92c
commit a6a781a58b
21 changed files with 323 additions and 275 deletions
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22
fs/xfs/libxfs/xfs_ialloc.c
View file

@ -2491,7 +2491,7 @@ xfs_check_agi_unlinked(
#define xfs_check_agi_unlinked(agi)
#endif
static bool
static xfs_failaddr_t
xfs_agi_verify(
struct xfs_buf *bp)
{
@ -2500,28 +2500,28 @@ xfs_agi_verify(
if (xfs_sb_version_hascrc(&mp->m_sb)) {
if (!uuid_equal(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid))
return false;
return __this_address;
if (!xfs_log_check_lsn(mp,
be64_to_cpu(XFS_BUF_TO_AGI(bp)->agi_lsn)))
return false;
return __this_address;
}
/*
* Validate the magic number of the agi block.
*/
if (agi->agi_magicnum != cpu_to_be32(XFS_AGI_MAGIC))
return false;
return __this_address;
if (!XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)))
return false;
return __this_address;
if (be32_to_cpu(agi->agi_level) < 1 ||
be32_to_cpu(agi->agi_level) > XFS_BTREE_MAXLEVELS)
return false;
return __this_address;
if (xfs_sb_version_hasfinobt(&mp->m_sb) &&
(be32_to_cpu(agi->agi_free_level) < 1 ||
be32_to_cpu(agi->agi_free_level) > XFS_BTREE_MAXLEVELS))
return false;
return __this_address;
/*
* during growfs operations, the perag is not fully initialised,
@ -2530,10 +2530,10 @@ xfs_agi_verify(
* so we can detect and avoid this problem.
*/
if (bp->b_pag && be32_to_cpu(agi->agi_seqno) != bp->b_pag->pag_agno)
return false;
return __this_address;
xfs_check_agi_unlinked(agi);
return true;
return NULL;
}
static void
@ -2545,7 +2545,7 @@ xfs_agi_read_verify(
if (xfs_sb_version_hascrc(&mp->m_sb) &&
!xfs_buf_verify_cksum(bp, XFS_AGI_CRC_OFF))
xfs_verifier_error(bp, -EFSBADCRC);
else if (XFS_TEST_ERROR(!xfs_agi_verify(bp), mp,
else if (XFS_TEST_ERROR(xfs_agi_verify(bp), mp,
XFS_ERRTAG_IALLOC_READ_AGI))
xfs_verifier_error(bp, -EFSCORRUPTED);
}
@ -2557,7 +2557,7 @@ xfs_agi_write_verify(
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_buf_log_item *bip = bp->b_fspriv;
if (!xfs_agi_verify(bp)) {
if (xfs_agi_verify(bp)) {
xfs_verifier_error(bp, -EFSCORRUPTED);
return;
}