xfs: repair extended attributes

If the extended attributes look bad, try to sift through the rubble to
find whatever keys/values we can, zap the attr tree, and re-add the
values.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/xfs/scrub/attr.h b/fs/xfs/scrub/attr.h
index 13a1d2e8424d..b2d758953300 100644
--- a/fs/xfs/scrub/attr.h
+++ b/fs/xfs/scrub/attr.h
@@ -37,6 +37,16 @@ xchk_xattr_valuebuf(
 	return ab->buf;
 }
 
+/* A place to store attribute names. */
+static inline unsigned char *
+xchk_xattr_namebuf(
+	struct xfs_scrub	*sc)
+{
+	struct xchk_xattr_buf	*ab = sc->buf;
+
+	return (unsigned char *)ab->buf + ab->sz - XATTR_NAME_MAX - 1;
+}
+
 /* A bitmap of space usage computed by walking an attr leaf block. */
 static inline unsigned long *
 xchk_xattr_usedmap(