diff options
author | Brian Foster <bfoster@redhat.com> | 2019-02-07 10:45:48 -0800 |
---|---|---|
committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-11 16:07:01 -0800 |
commit | 8764f98351fa561296f70c3435a5cb1eb6272c39 (patch) | |
tree | a4f94adf68453c5b24d14a98377448ed490a64cc | |
parent | 39708c20ab51337c3eb282a824eb0aaff7ebe2e1 (diff) | |
download | linux-8764f98351fa561296f70c3435a5cb1eb6272c39.tar.bz2 |
xfs: factor xfs_da3_blkinfo verification into common helper
With the verifier magic value helper in place, we've left a bit more
duplicate code across the verifiers that involve struct
xfs_da3_blkinfo. This includes the da node, xattr leaf and dir leaf
verifiers, all of which perform similar checks for v4 and v5
filesystems.
Create a common helper to verify an xfs_da3_blkinfo structure,
taking care to only access v5 fields where appropriate, and refactor
the aforementioned verifiers to use the helper. No functional
changes.
Signed-off-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>
-rw-r--r-- | fs/xfs/libxfs/xfs_attr_leaf.c | 16 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_da_btree.c | 44 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_da_format.h | 3 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_dir2_leaf.c | 17 |
4 files changed, 43 insertions, 37 deletions
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c index f164f296f1b8..0c92987f57fc 100644 --- a/fs/xfs/libxfs/xfs_attr_leaf.c +++ b/fs/xfs/libxfs/xfs_attr_leaf.c @@ -245,22 +245,14 @@ xfs_attr3_leaf_verify( struct xfs_attr_leaf_entry *entries; uint32_t end; /* must be 32bit - see below */ int i; + xfs_failaddr_t fa; xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf); - if (!xfs_verify_magic(bp, leaf->hdr.info.magic)) - return __this_address; - - if (xfs_sb_version_hascrc(&mp->m_sb)) { - struct xfs_da3_node_hdr *hdr3 = bp->b_addr; + fa = xfs_da3_blkinfo_verify(bp, bp->b_addr); + if (fa) + return fa; - if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_meta_uuid)) - return __this_address; - if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn) - return __this_address; - if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->info.lsn))) - return __this_address; - } /* * In recovery there is a transient state where count == 0 is valid * because we may have transitioned an empty shortform attr to a leaf diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c index e02d2f407e12..eb2cee428f26 100644 --- a/fs/xfs/libxfs/xfs_da_btree.c +++ b/fs/xfs/libxfs/xfs_da_btree.c @@ -116,6 +116,34 @@ xfs_da_state_free(xfs_da_state_t *state) kmem_zone_free(xfs_da_state_zone, state); } +/* + * Verify an xfs_da3_blkinfo structure. Note that the da3 fields are only + * accessible on v5 filesystems. This header format is common across da node, + * attr leaf and dir leaf blocks. + */ +xfs_failaddr_t +xfs_da3_blkinfo_verify( + struct xfs_buf *bp, + struct xfs_da3_blkinfo *hdr3) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_da_blkinfo *hdr = &hdr3->hdr; + + if (!xfs_verify_magic(bp, hdr->magic)) + return __this_address; + + if (xfs_sb_version_hascrc(&mp->m_sb)) { + if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) + return __this_address; + if (be64_to_cpu(hdr3->blkno) != bp->b_bn) + return __this_address; + if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) + return __this_address; + } + + return 0; +} + static xfs_failaddr_t xfs_da3_node_verify( struct xfs_buf *bp) @@ -124,24 +152,16 @@ xfs_da3_node_verify( struct xfs_da_intnode *hdr = bp->b_addr; struct xfs_da3_icnode_hdr ichdr; const struct xfs_dir_ops *ops; + xfs_failaddr_t fa; ops = xfs_dir_get_ops(mp, NULL); ops->node_hdr_from_disk(&ichdr, hdr); - if (!xfs_verify_magic(bp, hdr->hdr.info.magic)) - return __this_address; + fa = xfs_da3_blkinfo_verify(bp, bp->b_addr); + if (fa) + return fa; - if (xfs_sb_version_hascrc(&mp->m_sb)) { - struct xfs_da3_node_hdr *hdr3 = bp->b_addr; - - if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_meta_uuid)) - return __this_address; - if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn) - return __this_address; - if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->info.lsn))) - return __this_address; - } if (ichdr.level == 0) return __this_address; if (ichdr.level > XFS_DA_NODE_MAXDEPTH) diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h index 5d5bf3bffc78..ae654e06b2fb 100644 --- a/fs/xfs/libxfs/xfs_da_format.h +++ b/fs/xfs/libxfs/xfs_da_format.h @@ -869,4 +869,7 @@ static inline unsigned int xfs_dir2_dirblock_bytes(struct xfs_sb *sbp) return 1 << (sbp->sb_blocklog + sbp->sb_dirblklog); } +xfs_failaddr_t xfs_da3_blkinfo_verify(struct xfs_buf *bp, + struct xfs_da3_blkinfo *hdr3); + #endif /* __XFS_DA_FORMAT_H__ */ diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c index dee0fd333d9d..094028b7b162 100644 --- a/fs/xfs/libxfs/xfs_dir2_leaf.c +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c @@ -146,20 +146,11 @@ xfs_dir3_leaf_verify( { struct xfs_mount *mp = bp->b_target->bt_mount; struct xfs_dir2_leaf *leaf = bp->b_addr; + xfs_failaddr_t fa; - if (!xfs_verify_magic(bp, leaf->hdr.info.magic)) - return __this_address; - - if (xfs_sb_version_hascrc(&mp->m_sb)) { - struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; - - if (!uuid_equal(&leaf3->info.uuid, &mp->m_sb.sb_meta_uuid)) - return __this_address; - if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) - return __this_address; - if (!xfs_log_check_lsn(mp, be64_to_cpu(leaf3->info.lsn))) - return __this_address; - } + fa = xfs_da3_blkinfo_verify(bp, bp->b_addr); + if (fa) + return fa; return xfs_dir3_leaf_check_int(mp, NULL, NULL, leaf); } |