diff mbox series

[5.9,070/757] smb3: do not try to cache root directory if dir leases not supported

Message ID 20201027135453.831501205@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Oct. 27, 2020, 1:45 p.m. UTC 
From: Steve French <stfrench@microsoft.com>

commit 3c6e65e679182d55779ef6f8582f0945af4319b0 upstream.

To servers which do not support directory leases (e.g. Samba)
it is wasteful to try to open_shroot (ie attempt to cache the
root directory handle).  Skip attempt to open_shroot when
server does not indicate support for directory leases.

Cuts the number of requests on mount from 17 to 15, and
cuts the number of requests on stat of the root directory
from 4 to 3.

Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org> # v5.1+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/cifs/connect.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3595,7 +3595,10 @@  cifs_get_tcon(struct cifs_ses *ses, stru
 	 */
 	tcon->retry = volume_info->retry;
 	tcon->nocase = volume_info->nocase;
-	tcon->nohandlecache = volume_info->nohandlecache;
+	if (ses->server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING)
+		tcon->nohandlecache = volume_info->nohandlecache;
+	else
+		tcon->nohandlecache = 1;
 	tcon->nodelete = volume_info->nodelete;
 	tcon->local_lease = volume_info->local_lease;
 	INIT_LIST_HEAD(&tcon->pending_opens);