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.h>
17 #include <linux/time.h> /* struct timeval */
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 struct sk_buff *alloc_tx(struct atm_vcc *vcc, unsigned int size)
68 struct sock *sk = sk_atm(vcc);
70 if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
71 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
72 sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
75 while (!(skb = alloc_skb(size, GFP_KERNEL)))
77 pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
78 atomic_add(skb->truesize, &sk->sk_wmem_alloc);
82 static void vcc_sock_destruct(struct sock *sk)
84 if (atomic_read(&sk->sk_rmem_alloc))
85 printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
86 __func__, atomic_read(&sk->sk_rmem_alloc));
88 if (atomic_read(&sk->sk_wmem_alloc))
89 printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
90 __func__, atomic_read(&sk->sk_wmem_alloc));
93 static void vcc_def_wakeup(struct sock *sk)
98 wq = rcu_dereference(sk->sk_wq);
99 if (wq_has_sleeper(wq))
104 static inline int vcc_writable(struct sock *sk)
106 struct atm_vcc *vcc = atm_sk(sk);
108 return (vcc->qos.txtp.max_sdu +
109 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
112 static void vcc_write_space(struct sock *sk)
114 struct socket_wq *wq;
118 if (vcc_writable(sk)) {
119 wq = rcu_dereference(sk->sk_wq);
120 if (wq_has_sleeper(wq))
121 wake_up_interruptible(&wq->wait);
123 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
129 static struct proto vcc_proto = {
131 .owner = THIS_MODULE,
132 .obj_size = sizeof(struct atm_vcc),
135 int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
141 if (sock->type == SOCK_STREAM)
143 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto);
146 sock_init_data(sock, sk);
147 sk->sk_state_change = vcc_def_wakeup;
148 sk->sk_write_space = vcc_write_space;
152 memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
153 memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
154 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
155 atomic_set(&sk->sk_wmem_alloc, 1);
156 atomic_set(&sk->sk_rmem_alloc, 0);
159 vcc->push_oam = NULL;
160 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
161 vcc->atm_options = vcc->aal_options = 0;
162 sk->sk_destruct = vcc_sock_destruct;
166 static void vcc_destroy_socket(struct sock *sk)
168 struct atm_vcc *vcc = atm_sk(sk);
171 set_bit(ATM_VF_CLOSE, &vcc->flags);
172 clear_bit(ATM_VF_READY, &vcc->flags);
174 if (vcc->dev->ops->close)
175 vcc->dev->ops->close(vcc);
177 vcc->push(vcc, NULL); /* atmarpd has no push */
179 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
180 atm_return(vcc, skb->truesize);
184 module_put(vcc->dev->ops->owner);
185 atm_dev_put(vcc->dev);
188 vcc_remove_socket(sk);
191 int vcc_release(struct socket *sock)
193 struct sock *sk = sock->sk;
197 vcc_destroy_socket(sock->sk);
205 void vcc_release_async(struct atm_vcc *vcc, int reply)
207 struct sock *sk = sk_atm(vcc);
209 set_bit(ATM_VF_CLOSE, &vcc->flags);
210 sk->sk_shutdown |= RCV_SHUTDOWN;
212 clear_bit(ATM_VF_WAITING, &vcc->flags);
213 sk->sk_state_change(sk);
215 EXPORT_SYMBOL(vcc_release_async);
217 void vcc_process_recv_queue(struct atm_vcc *vcc)
219 struct sk_buff_head queue, *rq;
220 struct sk_buff *skb, *tmp;
223 __skb_queue_head_init(&queue);
224 rq = &sk_atm(vcc)->sk_receive_queue;
226 spin_lock_irqsave(&rq->lock, flags);
227 skb_queue_splice_init(rq, &queue);
228 spin_unlock_irqrestore(&rq->lock, flags);
230 skb_queue_walk_safe(&queue, skb, tmp) {
231 __skb_unlink(skb, &queue);
235 EXPORT_SYMBOL(vcc_process_recv_queue);
237 void atm_dev_signal_change(struct atm_dev *dev, char signal)
239 pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n",
240 __func__, signal, dev, dev->number, dev->signal);
242 /* atm driver sending invalid signal */
243 WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND);
245 if (dev->signal == signal)
246 return; /* no change */
248 dev->signal = signal;
250 atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev);
252 EXPORT_SYMBOL(atm_dev_signal_change);
254 void atm_dev_release_vccs(struct atm_dev *dev)
258 write_lock_irq(&vcc_sklist_lock);
259 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
260 struct hlist_head *head = &vcc_hash[i];
261 struct hlist_node *node, *tmp;
265 sk_for_each_safe(s, node, tmp, head) {
267 if (vcc->dev == dev) {
268 vcc_release_async(vcc, -EPIPE);
273 write_unlock_irq(&vcc_sklist_lock);
275 EXPORT_SYMBOL(atm_dev_release_vccs);
277 static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
281 if (!tp->traffic_class)
285 max_sdu = ATM_CELL_SIZE-1;
288 max_sdu = ATM_MAX_AAL34_PDU;
291 pr_warning("AAL problems ... (%d)\n", aal);
294 max_sdu = ATM_MAX_AAL5_PDU;
297 tp->max_sdu = max_sdu;
298 else if (tp->max_sdu > max_sdu)
301 tp->max_cdv = ATM_MAX_CDV;
305 static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
307 struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)];
308 struct hlist_node *node;
310 struct atm_vcc *walk;
312 sk_for_each(s, node, head) {
314 if (walk->dev != vcc->dev)
316 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
317 walk->vci == vci && ((walk->qos.txtp.traffic_class !=
318 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
319 (walk->qos.rxtp.traffic_class != ATM_NONE &&
320 vcc->qos.rxtp.traffic_class != ATM_NONE)))
324 /* allow VCCs with same VPI/VCI iff they don't collide on
325 TX/RX (but we may refuse such sharing for other reasons,
326 e.g. if protocol requires to have both channels) */
331 static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
333 static short p; /* poor man's per-device cache */
339 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
340 err = check_ci(vcc, *vpi, *vci);
343 /* last scan may have left values out of bounds for current device */
344 if (*vpi != ATM_VPI_ANY)
346 else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
348 if (*vci != ATM_VCI_ANY)
350 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
355 if (!check_ci(vcc, p, c)) {
360 if (*vci == ATM_VCI_ANY) {
362 if (c >= 1 << vcc->dev->ci_range.vci_bits)
365 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
366 *vpi == ATM_VPI_ANY) {
368 if (p >= 1 << vcc->dev->ci_range.vpi_bits)
371 } while (old_p != p || old_c != c);
375 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
378 struct sock *sk = sk_atm(vcc);
381 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
382 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
383 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
385 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
388 if (!try_module_get(dev->ops->owner))
391 write_lock_irq(&vcc_sklist_lock);
392 if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
393 (error = find_ci(vcc, &vpi, &vci))) {
394 write_unlock_irq(&vcc_sklist_lock);
395 goto fail_module_put;
399 __vcc_insert_socket(sk);
400 write_unlock_irq(&vcc_sklist_lock);
401 switch (vcc->qos.aal) {
403 error = atm_init_aal0(vcc);
404 vcc->stats = &dev->stats.aal0;
407 error = atm_init_aal34(vcc);
408 vcc->stats = &dev->stats.aal34;
411 /* ATM_AAL5 is also used in the "0 for default" case */
412 vcc->qos.aal = ATM_AAL5;
415 error = atm_init_aal5(vcc);
416 vcc->stats = &dev->stats.aal5;
422 error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal);
424 error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal);
427 pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
428 pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
429 vcc->qos.txtp.traffic_class,
430 vcc->qos.txtp.min_pcr,
431 vcc->qos.txtp.max_pcr,
432 vcc->qos.txtp.max_sdu);
433 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
434 vcc->qos.rxtp.traffic_class,
435 vcc->qos.rxtp.min_pcr,
436 vcc->qos.rxtp.max_pcr,
437 vcc->qos.rxtp.max_sdu);
439 if (dev->ops->open) {
440 error = dev->ops->open(vcc);
447 vcc_remove_socket(sk);
449 module_put(dev->ops->owner);
450 /* ensure we get dev module ref count correct */
455 int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
458 struct atm_vcc *vcc = ATM_SD(sock);
461 pr_debug("(vpi %d, vci %d)\n", vpi, vci);
462 if (sock->state == SS_CONNECTED)
464 if (sock->state != SS_UNCONNECTED)
469 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
470 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
472 if (test_bit(ATM_VF_PARTIAL, &vcc->flags))
474 pr_debug("(TX: cl %d,bw %d-%d,sdu %d; "
475 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
476 vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr,
477 vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu,
478 vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr,
479 vcc->qos.rxtp.max_pcr, vcc->qos.rxtp.max_sdu,
480 vcc->qos.aal == ATM_AAL5 ? "" :
481 vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ",
482 vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
483 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
485 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
486 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
488 if (likely(itf != ATM_ITF_ANY)) {
489 dev = try_then_request_module(atm_dev_lookup(itf),
490 "atm-device-%d", itf);
493 mutex_lock(&atm_dev_mutex);
494 if (!list_empty(&atm_devs)) {
495 dev = list_entry(atm_devs.next,
496 struct atm_dev, dev_list);
499 mutex_unlock(&atm_dev_mutex);
503 error = __vcc_connect(vcc, dev, vpi, vci);
508 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
509 set_bit(ATM_VF_PARTIAL, &vcc->flags);
510 if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags))
511 sock->state = SS_CONNECTED;
515 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
516 size_t size, int flags)
518 struct sock *sk = sock->sk;
521 int copied, error = -EINVAL;
523 if (sock->state != SS_CONNECTED)
526 /* only handle MSG_DONTWAIT and MSG_PEEK */
527 if (flags & ~(MSG_DONTWAIT | MSG_PEEK))
531 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
532 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
533 !test_bit(ATM_VF_READY, &vcc->flags))
536 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
543 msg->msg_flags |= MSG_TRUNC;
546 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
549 sock_recv_ts_and_drops(msg, sk, skb);
551 if (!(flags & MSG_PEEK)) {
552 pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc),
554 atm_return(vcc, skb->truesize);
557 skb_free_datagram(sk, skb);
561 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
564 struct sock *sk = sock->sk;
569 const void __user *buff;
573 if (sock->state != SS_CONNECTED) {
581 if (m->msg_iovlen != 1) {
582 error = -ENOSYS; /* fix this later @@@ */
585 buff = m->msg_iov->iov_base;
586 size = m->msg_iov->iov_len;
588 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
589 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
590 !test_bit(ATM_VF_READY, &vcc->flags)) {
592 send_sig(SIGPIPE, current, 0);
599 if (size < 0 || size > vcc->qos.txtp.max_sdu) {
604 eff = (size+3) & ~3; /* align to word boundary */
605 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
607 while (!(skb = alloc_tx(vcc, eff))) {
608 if (m->msg_flags & MSG_DONTWAIT) {
613 if (signal_pending(current)) {
614 error = -ERESTARTSYS;
617 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
618 test_bit(ATM_VF_CLOSE, &vcc->flags) ||
619 !test_bit(ATM_VF_READY, &vcc->flags)) {
621 send_sig(SIGPIPE, current, 0);
624 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
626 finish_wait(sk_sleep(sk), &wait);
629 skb->dev = NULL; /* for paths shared with net_device interfaces */
630 ATM_SKB(skb)->atm_options = vcc->atm_options;
631 if (copy_from_user(skb_put(skb, size), buff, size)) {
637 memset(skb->data + size, 0, eff-size);
638 error = vcc->dev->ops->send(vcc, skb);
639 error = error ? error : size;
645 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
647 struct sock *sk = sock->sk;
651 sock_poll_wait(file, sk_sleep(sk), wait);
656 /* exceptional events */
660 if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
661 test_bit(ATM_VF_CLOSE, &vcc->flags))
665 if (!skb_queue_empty(&sk->sk_receive_queue))
666 mask |= POLLIN | POLLRDNORM;
669 if (sock->state == SS_CONNECTING &&
670 test_bit(ATM_VF_WAITING, &vcc->flags))
673 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
675 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
680 static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
685 * Don't let the QoS change the already connected AAL type nor the
688 if (qos->aal != vcc->qos.aal ||
689 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
690 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
692 error = adjust_tp(&qos->txtp, qos->aal);
694 error = adjust_tp(&qos->rxtp, qos->aal);
697 if (!vcc->dev->ops->change_qos)
699 if (sk_atm(vcc)->sk_family == AF_ATMPVC)
700 return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET);
701 return svc_change_qos(vcc, qos);
704 static int check_tp(const struct atm_trafprm *tp)
706 /* @@@ Should be merged with adjust_tp */
707 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS)
709 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
712 if (tp->min_pcr == ATM_MAX_PCR)
714 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
715 tp->min_pcr > tp->max_pcr)
718 * We allow pcr to be outside [min_pcr,max_pcr], because later
719 * adjustment may still push it in the valid range.
724 static int check_qos(const struct atm_qos *qos)
728 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
730 if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
731 qos->txtp.traffic_class && qos->rxtp.traffic_class &&
732 qos->txtp.traffic_class != ATM_ANYCLASS &&
733 qos->rxtp.traffic_class != ATM_ANYCLASS)
735 error = check_tp(&qos->txtp);
738 return check_tp(&qos->rxtp);
741 int vcc_setsockopt(struct socket *sock, int level, int optname,
742 char __user *optval, unsigned int optlen)
748 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
757 if (copy_from_user(&qos, optval, sizeof(qos)))
759 error = check_qos(&qos);
762 if (sock->state == SS_CONNECTED)
763 return atm_change_qos(vcc, &qos);
764 if (sock->state != SS_UNCONNECTED)
767 set_bit(ATM_VF_HASQOS, &vcc->flags);
771 if (get_user(value, (unsigned long __user *)optval))
774 vcc->atm_options |= ATM_ATMOPT_CLP;
776 vcc->atm_options &= ~ATM_ATMOPT_CLP;
779 if (level == SOL_SOCKET)
783 if (!vcc->dev || !vcc->dev->ops->setsockopt)
785 return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen);
788 int vcc_getsockopt(struct socket *sock, int level, int optname,
789 char __user *optval, int __user *optlen)
794 if (get_user(len, optlen))
796 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
802 if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
804 return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos))
807 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0,
808 (unsigned long __user *)optval) ? -EFAULT : 0;
811 struct sockaddr_atmpvc pvc;
813 if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
815 pvc.sap_family = AF_ATMPVC;
816 pvc.sap_addr.itf = vcc->dev->number;
817 pvc.sap_addr.vpi = vcc->vpi;
818 pvc.sap_addr.vci = vcc->vci;
819 return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0;
822 if (level == SOL_SOCKET)
826 if (!vcc->dev || !vcc->dev->ops->getsockopt)
828 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
831 int register_atmdevice_notifier(struct notifier_block *nb)
833 return atomic_notifier_chain_register(&atm_dev_notify_chain, nb);
835 EXPORT_SYMBOL_GPL(register_atmdevice_notifier);
837 void unregister_atmdevice_notifier(struct notifier_block *nb)
839 atomic_notifier_chain_unregister(&atm_dev_notify_chain, nb);
841 EXPORT_SYMBOL_GPL(unregister_atmdevice_notifier);
843 static int __init atm_init(void)
847 error = proto_register(&vcc_proto, 0);
850 error = atmpvc_init();
852 pr_err("atmpvc_init() failed with %d\n", error);
853 goto out_unregister_vcc_proto;
855 error = atmsvc_init();
857 pr_err("atmsvc_init() failed with %d\n", error);
858 goto out_atmpvc_exit;
860 error = atm_proc_init();
862 pr_err("atm_proc_init() failed with %d\n", error);
863 goto out_atmsvc_exit;
865 error = atm_sysfs_init();
867 pr_err("atm_sysfs_init() failed with %d\n", error);
868 goto out_atmproc_exit;
878 out_unregister_vcc_proto:
879 proto_unregister(&vcc_proto);
883 static void __exit atm_exit(void)
889 proto_unregister(&vcc_proto);
892 subsys_initcall(atm_init);
894 module_exit(atm_exit);
896 MODULE_LICENSE("GPL");
897 MODULE_ALIAS_NETPROTO(PF_ATMPVC);
898 MODULE_ALIAS_NETPROTO(PF_ATMSVC);