[CIFS] Allow disabling CIFS Unix Extensions as mount option

Previously the only way to do this was to umount all mounts to that server,
turn off a proc setting (/proc/fs/cifs/LinuxExtensionsEnabled).

Fixes Samba bugzilla bug number: 4582 (and also 2008)

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 0a7813175a27..b98742fc3b5a 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -281,7 +281,9 @@ struct cifsTconInfo {
         FILE_SYSTEM_UNIX_INFO fsUnixInfo;
         unsigned retry:1;
         unsigned nocase:1;
-        /* BB add field for back pointer to sb struct? */
+        unsigned unix_ext:1; /* if off disable Linux extensions to CIFS protocol
+                                for this mount even if server would support */
+        /* BB add field for back pointer to sb struct(s)? */
 };
 
 /*