[PATCH 6.18 584/752] xfs: remove xfs_attr_leaf_hasname

Sasha Levin
2026-02-28T17:56:36Z

From: Christoph Hellwig <hch@lst.de>

[ Upstream commit 3a65ea768b8094e4699e72f9ab420eb9e0f3f568 ]

The calling convention of xfs_attr_leaf_hasname() is problematic, because
it returns a NULL buffer when xfs_attr3_leaf_read fails, a valid buffer
when xfs_attr3_leaf_lookup_int returns -ENOATTR or -EEXIST, and a
non-NULL buffer pointer for an already released buffer when
xfs_attr3_leaf_lookup_int fails with other error values.

Fix this by simply open coding xfs_attr_leaf_hasname in the callers, so
that the buffer release code is done by each caller of
xfs_attr3_leaf_read.

Cc: stable@vger.kernel.org # v5.19+
Fixes: 07120f1abdff ("xfs: Add xfs_has_attr and subroutines")
Reported-by: Mark Tinguely <mark.tinguely@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/xfs/libxfs/xfs_attr.c | 75 +++++++++++++---------------------------
1 file changed, 24 insertions(+), 51 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 8c04acd30d489..b88e65c7e45de 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -50,7 +50,6 @@ STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args);
*/
STATIC int xfs_attr_leaf_get(xfs_da_args_t *args);
STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args);
-STATIC int xfs_attr_leaf_hasname(struct xfs_da_args *args, struct xfs_buf **bp);

/*
* Internal routines when attribute list is more than one block.
@@ -979,11 +978,12 @@ xfs_attr_lookup(
return error;

if (xfs_attr_is_leaf(dp)) {
- error = xfs_attr_leaf_hasname(args, &bp);
-
- if (bp)
- xfs_trans_brelse(args->trans, bp);
-
+ error = xfs_attr3_leaf_read(args->trans, args->dp, args->owner,
+ 0, &bp);
+ if (error)
+ return error;
+ error = xfs_attr3_leaf_lookup_int(bp, args);
+ xfs_trans_brelse(args->trans, bp);
return error;
}

@@ -1222,27 +1222,6 @@ xfs_attr_shortform_addname(
* External routines when attribute list is one block
*========================================================================*/

-/*
- * Return EEXIST if attr is found, or ENOATTR if not
- */
-STATIC int
-xfs_attr_leaf_hasname(
- struct xfs_da_args *args,
- struct xfs_buf **bp)
-{
- int error = 0;
-
- error = xfs_attr3_leaf_read(args->trans, args->dp, args->owner, 0, bp);
- if (error)
- return error;
-
- error = xfs_attr3_leaf_lookup_int(*bp, args);
- if (error != -ENOATTR && error != -EEXIST)
- xfs_trans_brelse(args->trans, *bp);
-
- return error;
-}
-
/*
* Remove a name from the leaf attribute list structure
*
@@ -1253,25 +1232,22 @@ STATIC int
xfs_attr_leaf_removename(
struct xfs_da_args *args)
{
- struct xfs_inode *dp;
- struct xfs_buf *bp;
+ struct xfs_inode *dp = args->dp;
int error, forkoff;
+ struct xfs_buf *bp;

trace_xfs_attr_leaf_removename(args);

- /*
- * Remove the attribute.
- */
- dp = args->dp;
-
- error = xfs_attr_leaf_hasname(args, &bp);
- if (error == -ENOATTR) {
+ error = xfs_attr3_leaf_read(args->trans, args->dp, args->owner, 0, &bp);
+ if (error)
+ return error;
+ error = xfs_attr3_leaf_lookup_int(bp, args);
+ if (error != -EEXIST) {
xfs_trans_brelse(args->trans, bp);
- if (args->op_flags & XFS_DA_OP_RECOVERY)
+ if (error == -ENOATTR && (args->op_flags & XFS_DA_OP_RECOVERY))
return 0;
return error;
- } else if (error != -EEXIST)
- return error;
+ }

xfs_attr3_leaf_remove(bp, args);

@@ -1295,23 +1271,20 @@ xfs_attr_leaf_removename(
* Returns 0 on successful retrieval, otherwise an error.
*/
STATIC int
-xfs_attr_leaf_get(xfs_da_args_t *args)
+xfs_attr_leaf_get(
+ struct xfs_da_args *args)
{
- struct xfs_buf *bp;
- int error;
+ struct xfs_buf *bp;
+ int error;

trace_xfs_attr_leaf_get(args);

- error = xfs_attr_leaf_hasname(args, &bp);
-
- if (error == -ENOATTR) {
- xfs_trans_brelse(args->trans, bp);
- return error;
- } else if (error != -EEXIST)
+ error = xfs_attr3_leaf_read(args->trans, args->dp, args->owner, 0, &bp);
+ if (error)
return error;
-
-
- error = xfs_attr3_leaf_getvalue(bp, args);
+ error = xfs_attr3_leaf_lookup_int(bp, args);
+ if (error == -EEXIST)
+ error = xfs_attr3_leaf_getvalue(bp, args);
xfs_trans_brelse(args->trans, bp);
return error;
}
--
2.51.0