Commit 3c6e65e6 authored Oct 21, 2020 by Steve French

smb3: do not try to cache root directory if dir leases not supported



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+

parent 3c3317da

fs/cifs/connect.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -3608,7 +3608,10 @@ cifs_get_tcon(struct cifs_ses ses, struct smb_vol volume_info)
		*/
		tcon->retry = volume_info->retry;
		tcon->nocase = volume_info->nocase;
		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);

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