cifs: disable serverino if server doesn't support it

A recent regression when dealing with older servers. This bug was
introduced when we made serverino the default...

When the server can't provide inode numbers, disable it for the mount.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 18afe57b24611748e35377e95de5130c53a5a625..b6a47b32f21ecc557f61737d70a078742254005d 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -513,9 +513,12 @@ int cifs_get_inode_info(struct inode **pinode,
                                        cifs_sb->mnt_cifs_flags &
                                                CIFS_MOUNT_MAP_SPECIAL_CHR);
                        if (rc1) {
-                               /* BB EOPNOSUPP disable SERVER_INUM? */
                                cFYI(1, ("GetSrvInodeNum rc %d", rc1));
                                fattr.cf_uniqueid = iunique(sb, ROOT_I);
+                               /* disable serverino if call not supported */
+                               if (rc1 == -EINVAL)
+                                       cifs_sb->mnt_cifs_flags &=
+                                                       ~CIFS_MOUNT_SERVER_INUM;
                        }
                } else {
                        fattr.cf_uniqueid = iunique(sb, ROOT_I);