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cifs: do not disable interface polling on failure

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commit 42ca547b13a20e7cbb04fbdf8d5f089ac4bb35b7 upstream.

When a server has multichannel enabled, we keep polling the server
for interfaces periodically. However, when this query fails, we
disable the polling. This can be problematic as it takes away the
chance for the server to start advertizing again.

This change reschedules the delayed work, even if the current call
failed. That way, multichannel sessions can recover.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.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
2025-06-02 22:37:17 +05:30
committed by Greg Kroah-Hartman
parent 58021a32f2
commit 202d7e8389
2 changed files with 6 additions and 9 deletions
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6
fs/smb/client/connect.c
View File

@@ -132,13 +132,9 @@ static void smb2_query_server_interfaces(struct work_struct *work)
rc = server->ops->query_server_interfaces(xid, tcon, false);
free_xid(xid);
if (rc) {
if (rc == -EOPNOTSUPP)
return;
if (rc)
cifs_dbg(FYI, "%s: failed to query server interfaces: %d\n",
__func__, rc);
}
queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
(SMB_INTERFACE_POLL_INTERVAL * HZ));

9
fs/smb/client/smb2pdu.c
View File

@@ -437,6 +437,10 @@ skip_sess_setup:
free_xid(xid);
ses->flags &= ~CIFS_SES_FLAGS_PENDING_QUERY_INTERFACES;
/* regardless of rc value, setup polling */
queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
(SMB_INTERFACE_POLL_INTERVAL * HZ));
mutex_unlock(&ses->session_mutex);
if (rc == -EOPNOTSUPP && ses->chan_count > 1) {
@@ -457,11 +461,8 @@ skip_sess_setup:
if (ses->chan_max > ses->chan_count &&
ses->iface_count &&
!SERVER_IS_CHAN(server)) {
if (ses->chan_count == 1) {
if (ses->chan_count == 1)
cifs_server_dbg(VFS, "supports multichannel now\n");
queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
(SMB_INTERFACE_POLL_INTERVAL * HZ));
}
cifs_try_adding_channels(ses);
}