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xfs: consolidate & clarify mount sanity checks 

Pavol pointed out that there is one silent error case in the mount
path, and that others are rather uninformative.

I've taken Pavol's suggested patch and extended it a bit to also:

* fix a message which says "turned off" but actually errors out
* consolidate the vaguely differentiated "SB sanity check [12]"
  messages, and hexdump the superblock for analysis

Original-patch-by: Pavol Gono <Pavol.Gono@siemens.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Eric Sandeen 2011-05-20 21:52:17 +00:00 committed by Alex Elder
parent e163cbde98
commit c0e090ced2
2 changed files with 18 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/xfs/xfs_fs.h
View File

@ -249,6 +249,11 @@ typedef struct xfs_fsop_resblks {
#define XFS_MAX_LOG_BYTES \
((2 * 1024 * 1024 * 1024ULL) - XFS_MIN_LOG_BYTES)
/* Used for sanity checks on superblock */
#define XFS_MAX_DBLOCKS(s) ((xfs_drfsbno_t)(s)->sb_agcount * (s)->sb_agblocks)
#define XFS_MIN_DBLOCKS(s) ((xfs_drfsbno_t)((s)->sb_agcount - 1) * \
(s)->sb_agblocks + XFS_MIN_AG_BLOCKS)
/*
* Structures for XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG & XFS_IOC_FSGROWFSRT
*/

33
fs/xfs/xfs_mount.c
View File

@ -348,7 +348,7 @@ xfs_mount_validate_sb(
}
/*
* More sanity checking. These were stolen directly from
* More sanity checking. Most of these were stolen directly from
* xfs_repair.
*/
if (unlikely(
@ -371,23 +371,13 @@ xfs_mount_validate_sb(
(sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
(sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
(sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
(sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */))) {
(sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) ||
sbp->sb_dblocks == 0 ||
sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) {
if (loud)
xfs_warn(mp, "SB sanity check 1 failed");
return XFS_ERROR(EFSCORRUPTED);
}
/*
* Sanity check AG count, size fields against data size field
*/
if (unlikely(
sbp->sb_dblocks == 0 ||
sbp->sb_dblocks >
(xfs_drfsbno_t)sbp->sb_agcount * sbp->sb_agblocks ||
sbp->sb_dblocks < (xfs_drfsbno_t)(sbp->sb_agcount - 1) *
sbp->sb_agblocks + XFS_MIN_AG_BLOCKS)) {
if (loud)
xfs_warn(mp, "SB sanity check 2 failed");
XFS_CORRUPTION_ERROR("SB sanity check failed",
XFS_ERRLEVEL_LOW, mp, sbp);
return XFS_ERROR(EFSCORRUPTED);
}
@ -864,7 +854,8 @@ xfs_update_alignment(xfs_mount_t *mp)
if ((BBTOB(mp->m_dalign) & mp->m_blockmask) ||
(BBTOB(mp->m_swidth) & mp->m_blockmask)) {
if (mp->m_flags & XFS_MOUNT_RETERR) {
xfs_warn(mp, "alignment check 1 failed");
xfs_warn(mp, "alignment check failed: "
"(sunit/swidth vs. blocksize)");
return XFS_ERROR(EINVAL);
}
mp->m_dalign = mp->m_swidth = 0;
@ -875,6 +866,8 @@ xfs_update_alignment(xfs_mount_t *mp)
mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign);
if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) {
if (mp->m_flags & XFS_MOUNT_RETERR) {
xfs_warn(mp, "alignment check failed: "
"(sunit/swidth vs. ag size)");
return XFS_ERROR(EINVAL);
}
xfs_warn(mp,
@ -889,8 +882,8 @@ xfs_update_alignment(xfs_mount_t *mp)
mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth);
} else {
if (mp->m_flags & XFS_MOUNT_RETERR) {
xfs_warn(mp,
"stripe alignment turned off: sunit(%d) less than bsize(%d)",
xfs_warn(mp, "alignment check failed: "
"sunit(%d) less than bsize(%d)",
mp->m_dalign,
mp->m_blockmask +1);
return XFS_ERROR(EINVAL);