CIFS: reconnect thread reschedule itself
In case of error, smb2_reconnect_server reschedule itself with a delay, to avoid being too aggressive. Signed-off-by: Germano Percossi <germano.percossi@citrix.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> CC: Stable <stable@vger.kernel.org> Signed-off-by: Steve French <smfrench@gmail.com>
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@ -2181,6 +2181,9 @@ void smb2_reconnect_server(struct work_struct *work)
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struct cifs_tcon *tcon, *tcon2;
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struct list_head tmp_list;
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int tcon_exist = false;
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int rc;
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int resched = false;
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/* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
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mutex_lock(&server->reconnect_mutex);
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@ -2208,13 +2211,18 @@ void smb2_reconnect_server(struct work_struct *work)
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spin_unlock(&cifs_tcp_ses_lock);
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list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
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if (!smb2_reconnect(SMB2_INTERNAL_CMD, tcon))
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rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
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if (!rc)
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cifs_reopen_persistent_handles(tcon);
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else
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resched = true;
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list_del_init(&tcon->rlist);
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cifs_put_tcon(tcon);
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}
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cifs_dbg(FYI, "Reconnecting tcons finished\n");
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if (resched)
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queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
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mutex_unlock(&server->reconnect_mutex);
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/* now we can safely release srv struct */
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