xfs: allow reading of already-locked remote symbolic link

Expose the readlink variant that doesn't take the inode lock so that
the scrubber can inspect symlink contents.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

fs/xfs/xfs_symlink.c

@@ -43,8 +43,8 @@
 #include "xfs_log.h"
 
 /* ----- Kernel only functions below ----- */
-STATIC int
-xfs_readlink_bmap(
+int
+xfs_readlink_bmap_ilocked(
 	struct xfs_inode	*ip,
 	char			*link)
 {
@@ -153,7 +153,7 @@ xfs_readlink(
 	}
 
 
-	error = xfs_readlink_bmap(ip, link);
+	error = xfs_readlink_bmap_ilocked(ip, link);
 
  out:
 	xfs_iunlock(ip, XFS_ILOCK_SHARED);