shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 02:50:49 +09:00
Code Issues Packages Projects Releases Wiki Activity

cifs: do not poll server interfaces too regularly

Browse Source 
commit 072a28c890 upstream.

We have the server interface list hanging off the tcon
structure today for reasons unknown. So each tcon which is
connected to a file server can query them separately,
which is really unnecessary. To avoid this, in the query
function, we will check the time of last update of the
interface list, and avoid querying the server if it is
within a certain range.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shyam Prasad N
2023-03-08 12:11:31 +00:00
committed by Greg Kroah-Hartman
parent a163106b6d
commit ee1767a12e
1 changed files with 14 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
fs/cifs/smb2ops.c
View File

@@ -530,6 +530,14 @@ parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
p = buf;
spin_lock(&ses->iface_lock);
/* do not query too frequently, this time with lock held */
if (ses->iface_last_update &&
time_before(jiffies, ses->iface_last_update +
(SMB_INTERFACE_POLL_INTERVAL * HZ))) {
spin_unlock(&ses->iface_lock);
return 0;
}
/*
* Go through iface_list and do kref_put to remove
* any unused ifaces. ifaces in use will be removed
@@ -696,6 +704,12 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_
struct network_interface_info_ioctl_rsp *out_buf = NULL;
struct cifs_ses *ses = tcon->ses;
/* do not query too frequently */
if (ses->iface_last_update &&
time_before(jiffies, ses->iface_last_update +
(SMB_INTERFACE_POLL_INTERVAL * HZ)))
return 0;
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_QUERY_NETWORK_INTERFACE_INFO,
NULL /* no data input */, 0 /* no data input */,