fs/cifs: keep guid when assigning fid to fileinfo

When we open a durable handle we give a Globally Unique
Identifier (GUID) to the server which we must keep for later reference
e.g. when reopening persistent handles on reconnection.

Without this the GUID generated for a new persistent handle was lost and
16 zero bytes were used instead on re-opening.

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 5ed591d7fff3..91e53df4e420 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -541,6 +541,7 @@ smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
                                       &fid->purge_cache);
         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
+        memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 }
 
 static void