exportfs: add FILEID_INVALID to indicate invalid fid_type

This commit adds FILEID_INVALID = 0xff in fid_type to
indicate invalid fid_type

It avoids using magic number 255

Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Vivek Trivedi <vtrivedi018@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/fhandle.c b/fs/fhandle.c
index f775bfdd6e4a..26f12b95702a 100644
--- a/fs/fhandle.c
+++ b/fs/fhandle.c
@@ -52,7 +52,7 @@ static long do_sys_name_to_handle(struct path *path,
         handle_bytes = handle_dwords * sizeof(u32);
         handle->handle_bytes = handle_bytes;
         if ((handle->handle_bytes > f_handle.handle_bytes) ||
-            (retval == 255) || (retval == -ENOSPC)) {
+            (retval == FILEID_INVALID) || (retval == -ENOSPC)) {
                 /* As per old exportfs_encode_fh documentation
                  * we could return ENOSPC to indicate overflow
                  * But file system returned 255 always. So handle