1 /* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
5 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
7 #include <linux/module.h>
8 #include <linux/kmod.h>
9 #include <linux/net.h> /* struct socket, struct proto_ops */
10 #include <linux/atm.h> /* ATM stuff */
11 #include <linux/atmdev.h>
12 #include <linux/socket.h> /* SOL_SOCKET */
13 #include <linux/errno.h> /* error codes */
14 #include <linux/capability.h>
16 #include <linux/sched/signal.h>
17 #include <linux/time64.h> /* 64-bit time for seconds */
18 #include <linux/skbuff.h>
19 #include <linux/bitops.h>
20 #include <linux/init.h>
21 #include <linux/slab.h>
22 #include <net/sock.h> /* struct sock */
23 #include <linux/uaccess.h>
24 #include <linux/poll.h>
26 #include <linux/atomic.h>
28 #include "resources.h" /* atm_find_dev */
29 #include "common.h" /* prototypes */
30 #include "protocols.h" /* atm_init_<transport> */
31 #include "addr.h" /* address registry */
32 #include "signaling.h" /* for WAITING and sigd_attach */
34 struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
35 EXPORT_SYMBOL(vcc_hash);
37 DEFINE_RWLOCK(vcc_sklist_lock);
38 EXPORT_SYMBOL(vcc_sklist_lock);
40 static ATOMIC_NOTIFIER_HEAD(atm_dev_notify_chain);
42 static void __vcc_insert_socket(struct sock *sk)
44 struct atm_vcc *vcc = atm_sk(sk);
45 struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)];
46 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
47 sk_add_node(sk, head);
50 void vcc_insert_socket(struct sock *sk)
52 write_lock_irq(&vcc_sklist_lock);
53 __vcc_insert_socket(sk);
54 write_unlock_irq(&vcc_sklist_lock);
56 EXPORT_SYMBOL(vcc_insert_socket);
58 static void vcc_remove_socket(struct sock *sk)
60 write_lock_irq(&vcc_sklist_lock);
62 write_unlock_irq(&vcc_sklist_lock);
65 static bool vcc_tx_ready(struct atm_vcc *vcc, unsigned int size)
67 struct sock *sk = sk_atm(vcc);
69 if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
70 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
71 sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
77 static void vcc_sock_destruct(struct sock *sk)
79 if (atomic_read(&sk->sk_rmem_alloc))
80 printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
81 __func__, atomic_read(&sk->sk_rmem_alloc));
83 if (refcount_read(&sk->sk_wmem_alloc))
84 printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
85 __func__, refcount_read(&sk->sk_wmem_alloc));
88 static void vcc_def_wakeup(struct sock *sk)
93 wq = rcu_dereference(sk->sk_wq);
94 if (skwq_has_sleeper(wq))
99 static inline int vcc_writable(struct sock *sk)
101 struct atm_vcc *vcc = atm_sk(sk);
103 return (vcc->qos.txtp.max_sdu +
104 refcount_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
107 static void vcc_write_space(struct sock *sk)
109 struct socket_wq *wq;
113 if (vcc_writable(sk)) {
114 wq = rcu_dereference(sk->sk_wq);
115 if (skwq_has_sleeper(wq))
116 wake_up_interruptible(&wq->wait);
118 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
124 static void vcc_release_cb(struct sock *sk)
126 struct atm_vcc *vcc = atm_sk(sk);
129 vcc->release_cb(vcc);
132 static struct proto vcc_proto = {
134 .owner = THIS_MODULE,
135 .obj_size = sizeof(struct atm_vcc),
136 .release_cb = vcc_release_cb,
139 int vcc_create(struct net *net, struct socket *sock, int protocol, int family, int kern)
145 if (sock->type == SOCK_STREAM)
147 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto, kern);
150 sock_init_data(sock, sk);
151 sk->sk_state_change = vcc_def_wakeup;
152 sk->sk_write_space = vcc_write_space;
156 memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
157 memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
158 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
159 refcount_set(&sk->sk_wmem_alloc, 1);
160 atomic_set(&sk->sk_rmem_alloc, 0);
164 vcc->push_oam = NULL;
165 vcc->release_cb = NULL;
166 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
167 vcc->atm_options = vcc->aal_options = 0;
168 sk->sk_destruct = vcc_sock_destruct;
172 static void vcc_destroy_socket(struct sock *sk)
174 struct atm_vcc *vcc = atm_sk(sk);
177 set_bit(ATM_VF_CLOSE, &vcc->flags);
178 clear_bit(ATM_VF_READY, &vcc->flags);
180 if (vcc->dev->ops->close)
181 vcc->dev->ops->close(vcc);
183 vcc->push(vcc, NULL); /* atmarpd has no push */
184 module_put(vcc->owner);
186 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
187 atm_return(vcc, skb->truesize);
191 module_put(vcc->dev->ops->owner);
192 atm_dev_put(vcc->dev);
195 vcc_remove_socket(sk);
198 int vcc_release(struct socket *sock)
200 struct sock *sk = sock->sk;
204 vcc_destroy_socket(sock->sk);
212 void vcc_release_async(struct atm_vcc *vcc, int reply)
214 struct sock *sk = sk_atm(vcc);
216 set_bit(ATM_VF_CLOSE, &vcc->flags);
217 sk->sk_shutdown |= RCV_SHUTDOWN;
219 clear_bit(ATM_VF_WAITING, &vcc->flags);
220 sk->sk_state_change(sk);
222 EXPORT_SYMBOL(vcc_release_async);
224 void vcc_process_recv_queue(struct atm_vcc *vcc)
226 struct sk_buff_head queue, *rq;
227 struct sk_buff *skb, *tmp;
230 __skb_queue_head_init(&queue);
231 rq = &sk_atm(vcc)->sk_receive_queue;
233 spin_lock_irqsave(&rq->lock, flags);
234 skb_queue_splice_init(rq, &queue);
235 spin_unlock_irqrestore(&rq->lock, flags);
237 skb_queue_walk_safe(&queue, skb, tmp) {
238 __skb_unlink(skb, &queue);
242 EXPORT_SYMBOL(vcc_process_recv_queue);
244 void atm_dev_signal_change(struct atm_dev *dev, char signal)
246 pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n",
247 __func__, signal, dev, dev->number, dev->signal);
249 /* atm driver sending invalid signal */
250 WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND);
252 if (dev->signal == signal)
253 return; /* no change */
255 dev->signal = signal;
257 atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev);
259 EXPORT_SYMBOL(atm_dev_signal_change);
261 void atm_dev_release_vccs(struct atm_dev *dev)
265 write_lock_irq(&vcc_sklist_lock);
266 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
267 struct hlist_head *head = &vcc_hash[i];
268 struct hlist_node *tmp;
272 sk_for_each_safe(s, tmp, head) {
274 if (vcc->dev == dev) {
275 vcc_release_async(vcc, -EPIPE);
280 write_unlock_irq(&vcc_sklist_lock);
282 EXPORT_SYMBOL(atm_dev_release_vccs);
284 static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
288 if (!tp->traffic_class)
292 max_sdu = ATM_CELL_SIZE-1;
295 max_sdu = ATM_MAX_AAL34_PDU;
298 pr_warn("AAL problems ... (%d)\n", aal);
301 max_sdu = ATM_MAX_AAL5_PDU;
304 tp->max_sdu = max_sdu;
305 else if (tp->max_sdu > max_sdu)
308 tp->max_cdv = ATM_MAX_CDV;
312 static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
314 struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)];
316 struct atm_vcc *walk;
318 sk_for_each(s, head) {
320 if (walk->dev != vcc->dev)
322 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
323 walk->vci == vci && ((walk->qos.txtp.traffic_class !=
324 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
325 (walk->qos.rxtp.traffic_class != ATM_NONE &&
326 vcc->qos.rxtp.traffic_class != ATM_NONE)))
330 /* allow VCCs with same VPI/VCI iff they don't collide on
331 TX/RX (but we may refuse such sharing for other reasons,
332 e.g. if protocol requires to have both channels) */
337 static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
339 static short p; /* poor man's per-device cache */
345 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
346 err = check_ci(vcc, *vpi, *vci);
349 /* last scan may have left values out of bounds for current device */
350 if (*vpi != ATM_VPI_ANY)
352 else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
354 if (*vci != ATM_VCI_ANY)
356 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
361 if (!check_ci(vcc, p, c)) {
366 if (*vci == ATM_VCI_ANY) {
368 if (c >= 1 << vcc->dev->ci_range.vci_bits)
371 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
372 *vpi == ATM_VPI_ANY) {
374 if (p >= 1 << vcc->dev->ci_range.vpi_bits)
377 } while (old_p != p || old_c != c);
381 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
384 struct sock *sk = sk_atm(vcc);
387 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
388 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
389 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
391 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
394 if (!try_module_get(dev->ops->owner))
397 write_lock_irq(&vcc_sklist_lock);
398 if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
399 (error = find_ci(vcc, &vpi, &vci))) {
400 write_unlock_irq(&vcc_sklist_lock);
401 goto fail_module_put;
405 __vcc_insert_socket(sk);
406 write_unlock_irq(&vcc_sklist_lock);
407 switch (vcc->qos.aal) {
409 error = atm_init_aal0(vcc);
410 vcc->stats = &dev->stats.aal0;
413 error = atm_init_aal34(vcc);
414 vcc->stats = &dev->stats.aal34;
417 /* ATM_AAL5 is also used in the "0 for default" case */
418 vcc->qos.aal = ATM_AAL5;
421 error = atm_init_aal5(vcc);
422 vcc->stats = &dev->stats.aal5;
428 error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal);
430 error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal);
433 pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
434 pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
435 vcc->qos.txtp.traffic_class,
436 vcc->qos.txtp.min_pcr,
437 vcc->qos.txtp.max_pcr,
438 vcc->qos.txtp.max_sdu);
439 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
440 vcc->qos.rxtp.traffic_class,
441 vcc->qos.rxtp.min_pcr,
442 vcc->qos.rxtp.max_pcr,
443 vcc->qos.rxtp.max_sdu);
445 if (dev->ops->open) {
446 error = dev->ops->open(vcc);
453 vcc_remove_socket(sk);
455 module_put(dev->ops->owner);
456 /* ensure we get dev module ref count correct */
461 int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
464 struct atm_vcc *vcc = ATM_SD(sock);
467 pr_debug("(vpi %d, vci %d)\n", vpi, vci);
468 if (sock->state == SS_CONNECTED)
470 if (sock->state != SS_UNCONNECTED)
475 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
476 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
478 if (test_bit(ATM_VF_PARTIAL, &vcc->flags))
480 pr_debug("(TX: cl %d,bw %d-%d,sdu %d; "
481 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
482 vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr,
483 vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu,
484 vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr,
485 vcc->qos.rxtp.max_pcr, vcc->qos.rxtp.max_sdu,
486 vcc->qos.aal == ATM_AAL5 ? "" :
487 vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ",
488 vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
489 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
491 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
492 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
494 if (likely(itf != ATM_ITF_ANY)) {
495 dev = try_then_request_module(atm_dev_lookup(itf),
496 "atm-device-%d", itf);
499 mutex_lock(&atm_dev_mutex);
500 if (!list_empty(&atm_devs)) {
501 dev = list_entry(atm_devs.next,
502 struct atm_dev, dev_list);
505 mutex_unlock(&atm_dev_mutex);
509 error = __vcc_connect(vcc, dev, vpi, vci);
514 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
515 set_bit(ATM_VF_PARTIAL, &vcc->flags);
516 if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags))
517 sock->state = SS_CONNECTED;
521 int vcc_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
524 struct sock *sk = sock->sk;
527 int copied, error = -EINVAL;
529 if (sock->state != SS_CONNECTED)
532 /* only handle MSG_DONTWAIT and MSG_PEEK */
533 if (flags & ~(MSG_DONTWAIT | MSG_PEEK))
537 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
538 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
539 !test_bit(ATM_VF_READY, &vcc->flags))
542 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
549 msg->msg_flags |= MSG_TRUNC;
552 error = skb_copy_datagram_msg(skb, 0, msg, copied);
555 sock_recv_ts_and_drops(msg, sk, skb);
557 if (!(flags & MSG_PEEK)) {
558 pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc),
560 atm_return(vcc, skb->truesize);
563 skb_free_datagram(sk, skb);
567 int vcc_sendmsg(struct socket *sock, struct msghdr *m, size_t size)
569 struct sock *sk = sock->sk;
576 if (sock->state != SS_CONNECTED) {
585 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
586 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
587 !test_bit(ATM_VF_READY, &vcc->flags)) {
589 send_sig(SIGPIPE, current, 0);
596 if (size > vcc->qos.txtp.max_sdu) {
601 eff = (size+3) & ~3; /* align to word boundary */
602 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
604 while (!vcc_tx_ready(vcc, eff)) {
605 if (m->msg_flags & MSG_DONTWAIT) {
610 if (signal_pending(current)) {
611 error = -ERESTARTSYS;
614 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
615 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
616 !test_bit(ATM_VF_READY, &vcc->flags)) {
618 send_sig(SIGPIPE, current, 0);
621 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
623 finish_wait(sk_sleep(sk), &wait);
627 skb = alloc_skb(eff, GFP_KERNEL);
632 pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
633 atm_account_tx(vcc, skb);
635 skb->dev = NULL; /* for paths shared with net_device interfaces */
636 if (!copy_from_iter_full(skb_put(skb, size), size, &m->msg_iter)) {
642 memset(skb->data + size, 0, eff-size);
643 error = vcc->dev->ops->send(vcc, skb);
644 error = error ? error : size;
650 __poll_t vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
652 struct sock *sk = sock->sk;
656 sock_poll_wait(file, sock, wait);
661 /* exceptional events */
665 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
666 test_bit(ATM_VF_CLOSE, &vcc->flags))
670 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
671 mask |= EPOLLIN | EPOLLRDNORM;
674 if (sock->state == SS_CONNECTING &&
675 test_bit(ATM_VF_WAITING, &vcc->flags))
678 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
680 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
685 static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
690 * Don't let the QoS change the already connected AAL type nor the
693 if (qos->aal != vcc->qos.aal ||
694 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
695 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
697 error = adjust_tp(&qos->txtp, qos->aal);
699 error = adjust_tp(&qos->rxtp, qos->aal);
702 if (!vcc->dev->ops->change_qos)
704 if (sk_atm(vcc)->sk_family == AF_ATMPVC)
705 return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET);
706 return svc_change_qos(vcc, qos);
709 static int check_tp(const struct atm_trafprm *tp)
711 /* @@@ Should be merged with adjust_tp */
712 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS)
714 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
717 if (tp->min_pcr == ATM_MAX_PCR)
719 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
720 tp->min_pcr > tp->max_pcr)
723 * We allow pcr to be outside [min_pcr,max_pcr], because later
724 * adjustment may still push it in the valid range.
729 static int check_qos(const struct atm_qos *qos)
733 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
735 if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
736 qos->txtp.traffic_class && qos->rxtp.traffic_class &&
737 qos->txtp.traffic_class != ATM_ANYCLASS &&
738 qos->rxtp.traffic_class != ATM_ANYCLASS)
740 error = check_tp(&qos->txtp);
743 return check_tp(&qos->rxtp);
746 int vcc_setsockopt(struct socket *sock, int level, int optname,
747 char __user *optval, unsigned int optlen)
753 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
762 if (copy_from_user(&qos, optval, sizeof(qos)))
764 error = check_qos(&qos);
767 if (sock->state == SS_CONNECTED)
768 return atm_change_qos(vcc, &qos);
769 if (sock->state != SS_UNCONNECTED)
772 set_bit(ATM_VF_HASQOS, &vcc->flags);
776 if (get_user(value, (unsigned long __user *)optval))
779 vcc->atm_options |= ATM_ATMOPT_CLP;
781 vcc->atm_options &= ~ATM_ATMOPT_CLP;
784 if (level == SOL_SOCKET)
788 if (!vcc->dev || !vcc->dev->ops->setsockopt)
790 return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen);
793 int vcc_getsockopt(struct socket *sock, int level, int optname,
794 char __user *optval, int __user *optlen)
799 if (get_user(len, optlen))
801 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
807 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
809 return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos))
812 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0,
813 (unsigned long __user *)optval) ? -EFAULT : 0;
816 struct sockaddr_atmpvc pvc;
818 if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
820 memset(&pvc, 0, sizeof(pvc));
821 pvc.sap_family = AF_ATMPVC;
822 pvc.sap_addr.itf = vcc->dev->number;
823 pvc.sap_addr.vpi = vcc->vpi;
824 pvc.sap_addr.vci = vcc->vci;
825 return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0;
828 if (level == SOL_SOCKET)
832 if (!vcc->dev || !vcc->dev->ops->getsockopt)
834 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
837 int register_atmdevice_notifier(struct notifier_block *nb)
839 return atomic_notifier_chain_register(&atm_dev_notify_chain, nb);
841 EXPORT_SYMBOL_GPL(register_atmdevice_notifier);
843 void unregister_atmdevice_notifier(struct notifier_block *nb)
845 atomic_notifier_chain_unregister(&atm_dev_notify_chain, nb);
847 EXPORT_SYMBOL_GPL(unregister_atmdevice_notifier);
849 static int __init atm_init(void)
853 error = proto_register(&vcc_proto, 0);
856 error = atmpvc_init();
858 pr_err("atmpvc_init() failed with %d\n", error);
859 goto out_unregister_vcc_proto;
861 error = atmsvc_init();
863 pr_err("atmsvc_init() failed with %d\n", error);
864 goto out_atmpvc_exit;
866 error = atm_proc_init();
868 pr_err("atm_proc_init() failed with %d\n", error);
869 goto out_atmsvc_exit;
871 error = atm_sysfs_init();
873 pr_err("atm_sysfs_init() failed with %d\n", error);
874 goto out_atmproc_exit;
884 out_unregister_vcc_proto:
885 proto_unregister(&vcc_proto);
889 static void __exit atm_exit(void)
895 proto_unregister(&vcc_proto);
898 subsys_initcall(atm_init);
900 module_exit(atm_exit);
902 MODULE_LICENSE("GPL");
903 MODULE_ALIAS_NETPROTO(PF_ATMPVC);
904 MODULE_ALIAS_NETPROTO(PF_ATMSVC);