From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Provide a way to calculate the highest hash value of a leaf1 block.
This will be used by the directory scrubbing code to check the sanity
of hashes in leaf1 directory blocks.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_dir2_node.c | 28 ++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_dir2_priv.h | 2 ++
2 files changed, 30 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index bbd1238..15c1881 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -524,6 +524,34 @@ xfs_dir2_free_hdr_check(
#endif /* DEBUG */
/*
+ * Return the last hash value in the leaf1.
+ * Stale entries are ok.
+ */
+xfs_dahash_t /* hash value */
+xfs_dir2_leaf1_lasthash(
+ struct xfs_inode *dp,
+ struct xfs_buf *bp, /* leaf buffer */
+ int *count) /* count of entries in leaf */
+{
+ struct xfs_dir2_leaf *leaf = bp->b_addr;
+ struct xfs_dir2_leaf_entry *ents;
+ struct xfs_dir3_icleaf_hdr leafhdr;
+
+ dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
+
+ ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC ||
+ leafhdr.magic == XFS_DIR3_LEAF1_MAGIC);
+
+ if (count)
+ *count = leafhdr.count;
+ if (!leafhdr.count)
+ return 0;
+
+ ents = dp->d_ops->leaf_ents_p(leaf);
+ return be32_to_cpu(ents[leafhdr.count - 1].hashval);
+}
+
+/*
* Return the last hash value in the leaf.
* Stale entries are ok.
*/
diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index 576f2d2..c09bca1 100644
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -95,6 +95,8 @@ extern bool xfs_dir3_leaf_check_int(struct xfs_mount *mp, struct xfs_inode *dp,
/* xfs_dir2_node.c */
extern int xfs_dir2_leaf_to_node(struct xfs_da_args *args,
struct xfs_buf *lbp);
+extern xfs_dahash_t xfs_dir2_leaf1_lasthash(struct xfs_inode *dp,
+ struct xfs_buf *bp, int *count);
extern xfs_dahash_t xfs_dir2_leafn_lasthash(struct xfs_inode *dp,
struct xfs_buf *bp, int *count);
extern int xfs_dir2_leafn_lookup_int(struct xfs_buf *bp,
--
To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
