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xfs: improve the code that checks recovered extent-free intent items

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The code that validates recovered extent-free intent items is kind of a
mess -- it doesn't use the standard xfs type validators, and it doesn't
check for things that it should.  Fix the validator function to use the
standard validation helpers and look for more types of obvious errors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2020-11-29 16:33:38 -08:00
parent 3c15df3de0
commit 7396c7fbe0
1 changed files with 6 additions and 7 deletions
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13
fs/xfs/xfs_extfree_item.c
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@ -584,14 +584,13 @@ xfs_efi_validate_ext(
struct xfs_mount *mp,
struct xfs_extent *extp)
{
xfs_fsblock_t startblock_fsb;
if (extp->ext_start + extp->ext_len <= extp->ext_start)
return false;
startblock_fsb = XFS_BB_TO_FSB(mp,
XFS_FSB_TO_DADDR(mp, extp->ext_start));
if (startblock_fsb == 0 ||
extp->ext_len == 0 ||
startblock_fsb >= mp->m_sb.sb_dblocks ||
extp->ext_len >= mp->m_sb.sb_agblocks)
if (!xfs_verify_fsbno(mp, extp->ext_start))
return false;
if (!xfs_verify_fsbno(mp, extp->ext_start + extp->ext_len - 1))
return false;
return true;