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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-07 10:37:13 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-11 16:07:01 -0800 |
| commit | 7d36c19538d38f9ff6b93d2a3d23ee879b076dc6 (patch) | |
| tree | fe8bf04bddb297059e7db80126f9db0bb63a31e2 | |
| parent | 5837f62592ef7c07859a1b1a6e82030d85869f0f (diff) | |
| download | lwn-7d36c19538d38f9ff6b93d2a3d23ee879b076dc6.tar.gz lwn-7d36c19538d38f9ff6b93d2a3d23ee879b076dc6.zip | |
xfs: add xfs_verify_agino_or_null helper
Add a new helper to check that a per-AG inode pointer is either null or
points somewhere valid within that AG.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | fs/xfs/libxfs/xfs_inode_buf.c | 3 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_types.c | 13 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_types.h | 2 | ||||
| -rw-r--r-- | fs/xfs/scrub/agheader.c | 8 |
4 files changed, 19 insertions, 7 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index 09d9c8cfa4a0..82c4374acb4c 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -99,8 +99,7 @@ xfs_inode_buf_verify( unlinked_ino = be32_to_cpu(dip->di_next_unlinked); di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) && xfs_dinode_good_version(mp, dip->di_version) && - (unlinked_ino == NULLAGINO || - xfs_verify_agino(mp, agno, unlinked_ino)); + xfs_verify_agino_or_null(mp, agno, unlinked_ino); if (unlikely(XFS_TEST_ERROR(!di_ok, mp, XFS_ERRTAG_ITOBP_INOTOBP))) { if (readahead) { diff --git a/fs/xfs/libxfs/xfs_types.c b/fs/xfs/libxfs/xfs_types.c index 451608b5a37b..de310712dd6d 100644 --- a/fs/xfs/libxfs/xfs_types.c +++ b/fs/xfs/libxfs/xfs_types.c @@ -116,6 +116,19 @@ xfs_verify_agino( } /* + * Verify that an AG inode number pointer neither points outside the AG + * nor points at static metadata, or is NULLAGINO. + */ +bool +xfs_verify_agino_or_null( + struct xfs_mount *mp, + xfs_agnumber_t agno, + xfs_agino_t agino) +{ + return agino == NULLAGINO || xfs_verify_agino(mp, agno, agino); +} + +/* * Verify that an FS inode number pointer neither points outside the * filesystem nor points at static AG metadata. */ diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index 704b4f308780..c5a25403b4db 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -183,6 +183,8 @@ void xfs_agino_range(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t *first, xfs_agino_t *last); bool xfs_verify_agino(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t agino); +bool xfs_verify_agino_or_null(struct xfs_mount *mp, xfs_agnumber_t agno, + xfs_agino_t agino); bool xfs_verify_ino(struct xfs_mount *mp, xfs_ino_t ino); bool xfs_internal_inum(struct xfs_mount *mp, xfs_ino_t ino); bool xfs_verify_dir_ino(struct xfs_mount *mp, xfs_ino_t ino); diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c index 90955ab1e895..9d4e8293d37e 100644 --- a/fs/xfs/scrub/agheader.c +++ b/fs/xfs/scrub/agheader.c @@ -864,19 +864,17 @@ xchk_agi( /* Check inode pointers */ agino = be32_to_cpu(agi->agi_newino); - if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino)) + if (!xfs_verify_agino_or_null(mp, agno, agino)) xchk_block_set_corrupt(sc, sc->sa.agi_bp); agino = be32_to_cpu(agi->agi_dirino); - if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino)) + if (!xfs_verify_agino_or_null(mp, agno, agino)) xchk_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)) + if (!xfs_verify_agino_or_null(mp, agno, agino)) xchk_block_set_corrupt(sc, sc->sa.agi_bp); } |