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xfs: introduce xfs_validate_stripe_geometry()

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Introduce a common helper to consolidate stripe validation process.
Also make kernel code xfs_validate_sb_common() use it first.

Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Gao Xiang 2020-12-03 16:42:01 -08:00 committed by Darrick J. Wong
parent 237d7887ae
commit 7bc1fea9d3
2 changed files with 69 additions and 11 deletions
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77
fs/xfs/libxfs/xfs_sb.c
View file

@ -360,21 +360,18 @@ xfs_validate_sb_common(
}
}
if (sbp->sb_unit) {
if (!xfs_sb_version_hasdalign(sbp) ||
sbp->sb_unit > sbp->sb_width ||
(sbp->sb_width % sbp->sb_unit) != 0) {
xfs_notice(mp, "SB stripe unit sanity check failed");
return -EFSCORRUPTED;
}
} else if (xfs_sb_version_hasdalign(sbp)) {
/*
* Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign)
* would imply the image is corrupted.
*/
if (!!sbp->sb_unit ^ xfs_sb_version_hasdalign(sbp)) {
xfs_notice(mp, "SB stripe alignment sanity check failed");
return -EFSCORRUPTED;
} else if (sbp->sb_width) {
xfs_notice(mp, "SB stripe width sanity check failed");
return -EFSCORRUPTED;
}
if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit),
XFS_FSB_TO_B(mp, sbp->sb_width), 0, false))
return -EFSCORRUPTED;
if (xfs_sb_version_hascrc(&mp->m_sb) &&
sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
@ -1206,3 +1203,61 @@ xfs_sb_get_secondary(
*bpp = bp;
return 0;
}
/*
* sunit, swidth, sectorsize(optional with 0) should be all in bytes,
* so users won't be confused by values in error messages.
*/
bool
xfs_validate_stripe_geometry(
struct xfs_mount *mp,
__s64 sunit,
__s64 swidth,
int sectorsize,
bool silent)
{
if (swidth > INT_MAX) {
if (!silent)
xfs_notice(mp,
"stripe width (%lld) is too large", swidth);
return false;
}
if (sunit > swidth) {
if (!silent)
xfs_notice(mp,
"stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth);
return false;
}
if (sectorsize && (int)sunit % sectorsize) {
if (!silent)
xfs_notice(mp,
"stripe unit (%lld) must be a multiple of the sector size (%d)",
sunit, sectorsize);
return false;
}
if (sunit && !swidth) {
if (!silent)
xfs_notice(mp,
"invalid stripe unit (%lld) and stripe width of 0", sunit);
return false;
}
if (!sunit && swidth) {
if (!silent)
xfs_notice(mp,
"invalid stripe width (%lld) and stripe unit of 0", swidth);
return false;
}
if (sunit && (int)swidth % (int)sunit) {
if (!silent)
xfs_notice(mp,
"stripe width (%lld) must be a multiple of the stripe unit (%lld)",
swidth, sunit);
return false;
}
return true;
}

3
fs/xfs/libxfs/xfs_sb.h
View file

@ -42,4 +42,7 @@ extern int xfs_sb_get_secondary(struct xfs_mount *mp,
struct xfs_trans *tp, xfs_agnumber_t agno,
struct xfs_buf **bpp);
extern bool xfs_validate_stripe_geometry(struct xfs_mount *mp,
__s64 sunit, __s64 swidth, int sectorsize, bool silent);
#endif /* __XFS_SB_H__ */