+static void sock_shutdown(struct nbd_device *lo, int lock)
+{
+ /* Forcibly shutdown the socket causing all listeners
+ * to error
+ *
+ * FIXME: This code is duplicated from sys_shutdown, but
+ * there should be a more generic interface rather than
+ * calling socket ops directly here */
+ if (lock)
+ mutex_lock(&lo->tx_lock);
+ if (lo->sock) {
+ printk(KERN_WARNING "%s: shutting down socket\n",
+ lo->disk->disk_name);
+ kernel_sock_shutdown(lo->sock, SHUT_RDWR);
+ lo->sock = NULL;
+ }
+ if (lock)
+ mutex_unlock(&lo->tx_lock);
+}
+
+static void nbd_xmit_timeout(unsigned long arg)
+{
+ struct task_struct *task = (struct task_struct *)arg;
+
+ printk(KERN_WARNING "nbd: killing hung xmit (%s, pid: %d)\n",
+ task->comm, task->pid);
+ force_sig(SIGKILL, task);
+}
+