2 * An implementation of the Acorn Econet and AUN protocols.
3 * Philip Blundell <philb@gnu.org>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
12 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
18 #include <linux/socket.h>
19 #include <linux/sockios.h>
21 #include <linux/errno.h>
22 #include <linux/interrupt.h>
23 #include <linux/if_ether.h>
24 #include <linux/netdevice.h>
25 #include <linux/inetdevice.h>
26 #include <linux/route.h>
27 #include <linux/inet.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/wireless.h>
31 #include <linux/skbuff.h>
32 #include <linux/udp.h>
33 #include <linux/vmalloc.h>
35 #include <net/inet_common.h>
36 #include <linux/stat.h>
37 #include <linux/init.h>
38 #include <linux/if_ec.h>
41 #include <linux/spinlock.h>
42 #include <linux/rcupdate.h>
43 #include <linux/bitops.h>
44 #include <linux/mutex.h>
46 #include <asm/uaccess.h>
47 #include <asm/system.h>
49 static const struct proto_ops econet_ops;
50 static struct hlist_head econet_sklist;
51 static DEFINE_RWLOCK(econet_lock);
52 static DEFINE_MUTEX(econet_mutex);
54 /* Since there are only 256 possible network numbers (or fewer, depends
55 how you count) it makes sense to use a simple lookup table. */
56 static struct net_device *net2dev_map[256];
58 #define EC_PORT_IP 0xd2
60 #ifdef CONFIG_ECONET_AUNUDP
61 static DEFINE_SPINLOCK(aun_queue_lock);
62 static struct socket *udpsock;
63 #define AUN_PORT 0x8000
68 unsigned char code; /* AUN magic protocol byte */
75 static unsigned long aun_seq;
77 /* Queue of packets waiting to be transmitted. */
78 static struct sk_buff_head aun_queue;
79 static struct timer_list ab_cleanup_timer;
81 #endif /* CONFIG_ECONET_AUNUDP */
83 /* Per-packet information */
86 struct sockaddr_ec sec;
87 unsigned long cookie; /* Supplied by user. */
88 #ifdef CONFIG_ECONET_AUNUDP
90 unsigned long seq; /* Sequencing */
91 unsigned long timeout; /* Timeout */
92 unsigned long start; /* jiffies */
94 #ifdef CONFIG_ECONET_NATIVE
95 void (*sent)(struct sk_buff *, int result);
99 static void econet_remove_socket(struct hlist_head *list, struct sock *sk)
101 write_lock_bh(&econet_lock);
102 sk_del_node_init(sk);
103 write_unlock_bh(&econet_lock);
106 static void econet_insert_socket(struct hlist_head *list, struct sock *sk)
108 write_lock_bh(&econet_lock);
109 sk_add_node(sk, list);
110 write_unlock_bh(&econet_lock);
114 * Pull a packet from our receive queue and hand it to the user.
115 * If necessary we block.
118 static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
119 struct msghdr *msg, size_t len, int flags)
121 struct sock *sk = sock->sk;
126 msg->msg_namelen = sizeof(struct sockaddr_ec);
128 mutex_lock(&econet_mutex);
131 * Call the generic datagram receiver. This handles all sorts
132 * of horrible races and re-entrancy so we can forget about it
133 * in the protocol layers.
135 * Now it will return ENETDOWN, if device have just gone down,
136 * but then it will block.
139 skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err);
142 * An error occurred so return it. Because skb_recv_datagram()
143 * handles the blocking we don't see and worry about blocking
151 * You lose any data beyond the buffer you gave. If it worries a
152 * user program they can ask the device for its MTU anyway.
159 msg->msg_flags|=MSG_TRUNC;
162 /* We can't use skb_copy_datagram here */
163 err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
166 sk->sk_stamp = skb->tstamp;
169 memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
172 * Free or return the buffer as appropriate. Again this
173 * hides all the races and re-entrancy issues from us.
178 skb_free_datagram(sk, skb);
180 mutex_unlock(&econet_mutex);
185 * Bind an Econet socket.
188 static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
190 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
192 struct econet_sock *eo;
198 if (addr_len < sizeof(struct sockaddr_ec) ||
199 sec->sec_family != AF_ECONET)
202 mutex_lock(&econet_mutex);
208 eo->port = sec->port;
209 eo->station = sec->addr.station;
210 eo->net = sec->addr.net;
212 mutex_unlock(&econet_mutex);
217 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
219 * Queue a transmit result for the user to be told about.
222 static void tx_result(struct sock *sk, unsigned long cookie, int result)
224 struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
226 struct sockaddr_ec *sec;
230 printk(KERN_DEBUG "ec: memory squeeze, transmit result dropped.\n");
234 eb = (struct ec_cb *)&skb->cb;
235 sec = (struct sockaddr_ec *)&eb->sec;
236 memset(sec, 0, sizeof(struct sockaddr_ec));
237 sec->cookie = cookie;
238 sec->type = ECTYPE_TRANSMIT_STATUS | result;
239 sec->sec_family = AF_ECONET;
241 if (sock_queue_rcv_skb(sk, skb) < 0)
246 #ifdef CONFIG_ECONET_NATIVE
248 * Called by the Econet hardware driver when a packet transmit
249 * has completed. Tell the user.
252 static void ec_tx_done(struct sk_buff *skb, int result)
254 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
255 tx_result(skb->sk, eb->cookie, result);
260 * Send a packet. We have to work out which device it's going out on
261 * and hence whether to use real Econet or the UDP emulation.
264 static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
265 struct msghdr *msg, size_t len)
267 struct sock *sk = sock->sk;
268 struct sockaddr_ec *saddr=(struct sockaddr_ec *)msg->msg_name;
269 struct net_device *dev;
272 unsigned char port, cb;
273 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
277 #ifdef CONFIG_ECONET_AUNUDP
278 struct msghdr udpmsg;
281 struct sockaddr_in udpdest;
282 __kernel_size_t size;
291 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
295 * Get and verify the address.
298 mutex_lock(&econet_mutex);
300 if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) {
301 mutex_unlock(&econet_mutex);
304 addr.station = saddr->addr.station;
305 addr.net = saddr->addr.net;
309 /* Look for a device with the right network number. */
310 dev = net2dev_map[addr.net];
312 /* If not directly reachable, use some default */
314 dev = net2dev_map[0];
315 /* No interfaces at all? */
317 mutex_unlock(&econet_mutex);
322 if (dev->type == ARPHRD_ECONET) {
323 /* Real hardware Econet. We're not worthy etc. */
324 #ifdef CONFIG_ECONET_NATIVE
325 unsigned short proto = 0;
328 if (len + 15 > dev->mtu) {
329 mutex_unlock(&econet_mutex);
335 skb = sock_alloc_send_skb(sk, len+LL_ALLOCATED_SPACE(dev),
336 msg->msg_flags & MSG_DONTWAIT, &err);
340 skb_reserve(skb, LL_RESERVED_SPACE(dev));
341 skb_reset_network_header(skb);
343 eb = (struct ec_cb *)&skb->cb;
345 eb->cookie = saddr->cookie;
347 eb->sent = ec_tx_done;
350 res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len);
354 struct ec_framehdr *fh;
355 /* Poke in our control byte and
356 port number. Hack, hack. */
357 fh = (struct ec_framehdr *)(skb->data);
360 if (sock->type != SOCK_DGRAM) {
361 skb_reset_tail_pointer(skb);
366 /* Copy the data. Returns -EFAULT on error */
367 err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
368 skb->protocol = proto;
370 skb->priority = sk->sk_priority;
375 if (!(dev->flags & IFF_UP))
384 mutex_unlock(&econet_mutex);
395 mutex_unlock(&econet_mutex);
400 #ifdef CONFIG_ECONET_AUNUDP
401 /* AUN virtual Econet. */
403 if (udpsock == NULL) {
404 mutex_unlock(&econet_mutex);
405 return -ENETDOWN; /* No socket - can't send */
413 /* Make up a UDP datagram and hand it off to some higher intellect. */
415 memset(&udpdest, 0, sizeof(udpdest));
416 udpdest.sin_family = AF_INET;
417 udpdest.sin_port = htons(AUN_PORT);
419 /* At the moment we use the stupid Acorn scheme of Econet address
420 y.x maps to IP a.b.c.x. This should be replaced with something
421 more flexible and more aware of subnet masks. */
423 struct in_device *idev;
424 unsigned long network = 0;
427 idev = __in_dev_get_rcu(dev);
430 network = ntohl(idev->ifa_list->ifa_address) &
431 0xffffff00; /* !!! */
434 udpdest.sin_addr.s_addr = htonl(network | addr.station);
437 memset(&ah, 0, sizeof(ah));
440 ah.code = 2; /* magic */
442 /* tack our header on the front of the iovec */
443 size = sizeof(struct aunhdr);
444 iov[0].iov_base = (void *)&ah;
445 iov[0].iov_len = size;
447 userbuf = vmalloc(len);
448 if (userbuf == NULL) {
453 iov[1].iov_base = userbuf;
454 iov[1].iov_len = len;
455 err = memcpy_fromiovec(userbuf, msg->msg_iov, len);
459 /* Get a skbuff (no data, just holds our cb information) */
460 if ((skb = sock_alloc_send_skb(sk, 0,
461 msg->msg_flags & MSG_DONTWAIT,
465 eb = (struct ec_cb *)&skb->cb;
467 eb->cookie = saddr->cookie;
468 eb->timeout = (5*HZ);
471 eb->seq = (aun_seq++);
474 skb_queue_tail(&aun_queue, skb);
476 udpmsg.msg_name = (void *)&udpdest;
477 udpmsg.msg_namelen = sizeof(udpdest);
478 udpmsg.msg_iov = &iov[0];
479 udpmsg.msg_iovlen = 2;
480 udpmsg.msg_control = NULL;
481 udpmsg.msg_controllen = 0;
484 oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */
485 err = sock_sendmsg(udpsock, &udpmsg, size);
494 mutex_unlock(&econet_mutex);
500 * Look up the address of a socket.
503 static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
504 int *uaddr_len, int peer)
507 struct econet_sock *eo;
508 struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
513 memset(sec, 0, sizeof(*sec));
514 mutex_lock(&econet_mutex);
519 sec->sec_family = AF_ECONET;
520 sec->port = eo->port;
521 sec->addr.station = eo->station;
522 sec->addr.net = eo->net;
524 mutex_unlock(&econet_mutex);
526 *uaddr_len = sizeof(*sec);
530 static void econet_destroy_timer(unsigned long data)
532 struct sock *sk=(struct sock *)data;
534 if (!sk_has_allocations(sk)) {
539 sk->sk_timer.expires = jiffies + 10 * HZ;
540 add_timer(&sk->sk_timer);
541 printk(KERN_DEBUG "econet socket destroy delayed\n");
545 * Close an econet socket.
548 static int econet_release(struct socket *sock)
552 mutex_lock(&econet_mutex);
558 econet_remove_socket(&econet_sklist, sk);
561 * Now the socket is dead. No more input will appear.
564 sk->sk_state_change(sk); /* It is useless. Just for sanity. */
570 skb_queue_purge(&sk->sk_receive_queue);
572 if (sk_has_allocations(sk)) {
573 sk->sk_timer.data = (unsigned long)sk;
574 sk->sk_timer.expires = jiffies + HZ;
575 sk->sk_timer.function = econet_destroy_timer;
576 add_timer(&sk->sk_timer);
584 mutex_unlock(&econet_mutex);
588 static struct proto econet_proto = {
590 .owner = THIS_MODULE,
591 .obj_size = sizeof(struct econet_sock),
595 * Create an Econet socket
598 static int econet_create(struct net *net, struct socket *sock, int protocol)
601 struct econet_sock *eo;
604 if (net != &init_net)
605 return -EAFNOSUPPORT;
607 /* Econet only provides datagram services. */
608 if (sock->type != SOCK_DGRAM)
609 return -ESOCKTNOSUPPORT;
611 sock->state = SS_UNCONNECTED;
614 sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto);
619 sock->ops = &econet_ops;
620 sock_init_data(sock, sk);
623 sock_reset_flag(sk, SOCK_ZAPPED);
624 sk->sk_family = PF_ECONET;
627 econet_insert_socket(&econet_sklist, sk);
634 * Handle Econet specific ioctls
637 static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
640 struct ec_device *edev;
641 struct net_device *dev;
642 struct sockaddr_ec *sec;
646 * Fetch the caller's info block into kernel space
649 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
652 if ((dev = dev_get_by_name(&init_net, ifr.ifr_name)) == NULL)
655 sec = (struct sockaddr_ec *)&ifr.ifr_addr;
657 mutex_lock(&econet_mutex);
662 if (!capable(CAP_NET_ADMIN))
667 /* Magic up a new one. */
668 edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL);
675 net2dev_map[edev->net] = NULL;
676 edev->station = sec->addr.station;
677 edev->net = sec->addr.net;
678 net2dev_map[sec->addr.net] = dev;
680 net2dev_map[0] = dev;
689 memset(sec, 0, sizeof(struct sockaddr_ec));
690 sec->addr.station = edev->station;
691 sec->addr.net = edev->net;
692 sec->sec_family = AF_ECONET;
694 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
703 mutex_unlock(&econet_mutex);
711 * Handle generic ioctls
714 static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
716 struct sock *sk = sock->sk;
717 void __user *argp = (void __user *)arg;
721 return sock_get_timestamp(sk, argp);
724 return sock_get_timestampns(sk, argp);
728 return ec_dev_ioctl(sock, cmd, argp);
738 static struct net_proto_family econet_family_ops = {
740 .create = econet_create,
741 .owner = THIS_MODULE,
744 static const struct proto_ops econet_ops = {
746 .owner = THIS_MODULE,
747 .release = econet_release,
749 .connect = sock_no_connect,
750 .socketpair = sock_no_socketpair,
751 .accept = sock_no_accept,
752 .getname = econet_getname,
753 .poll = datagram_poll,
754 .ioctl = econet_ioctl,
755 .listen = sock_no_listen,
756 .shutdown = sock_no_shutdown,
757 .setsockopt = sock_no_setsockopt,
758 .getsockopt = sock_no_getsockopt,
759 .sendmsg = econet_sendmsg,
760 .recvmsg = econet_recvmsg,
761 .mmap = sock_no_mmap,
762 .sendpage = sock_no_sendpage,
765 #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
767 * Find the listening socket, if any, for the given data.
770 static struct sock *ec_listening_socket(unsigned char port, unsigned char
771 station, unsigned char net)
774 struct hlist_node *node;
776 sk_for_each(sk, node, &econet_sklist) {
777 struct econet_sock *opt = ec_sk(sk);
778 if ((opt->port == port || opt->port == 0) &&
779 (opt->station == station || opt->station == 0) &&
780 (opt->net == net || opt->net == 0))
789 * Queue a received packet for a socket.
792 static int ec_queue_packet(struct sock *sk, struct sk_buff *skb,
793 unsigned char stn, unsigned char net,
794 unsigned char cb, unsigned char port)
796 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
797 struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec;
799 memset(sec, 0, sizeof(struct sockaddr_ec));
800 sec->sec_family = AF_ECONET;
801 sec->type = ECTYPE_PACKET_RECEIVED;
805 sec->addr.station = stn;
807 return sock_queue_rcv_skb(sk, skb);
811 #ifdef CONFIG_ECONET_AUNUDP
813 * Send an AUN protocol response.
816 static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb)
818 struct sockaddr_in sin = {
819 .sin_family = AF_INET,
820 .sin_port = htons(AUN_PORT),
821 .sin_addr = {.s_addr = addr}
823 struct aunhdr ah = {.code = code, .cb = cb, .handle = seq};
824 struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)};
825 struct msghdr udpmsg;
827 udpmsg.msg_name = (void *)&sin;
828 udpmsg.msg_namelen = sizeof(sin);
829 udpmsg.msg_control = NULL;
830 udpmsg.msg_controllen = 0;
833 kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah));
838 * Handle incoming AUN packets. Work out if anybody wants them,
839 * and send positive or negative acknowledgements as appropriate.
842 static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len)
844 struct iphdr *ip = ip_hdr(skb);
845 unsigned char stn = ntohl(ip->saddr) & 0xff;
846 struct dst_entry *dst = skb_dst(skb);
847 struct ec_device *edev = NULL;
849 struct sk_buff *newskb;
852 edev = dst->dev->ec_ptr;
857 if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL)
858 goto bad; /* Nobody wants it */
860 newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15,
864 printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n");
865 /* Send nack and hope sender tries again */
869 memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1),
870 len - sizeof(struct aunhdr));
872 if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port))
874 /* Socket is bankrupt. */
879 aun_send_response(ip->saddr, ah->handle, 3, 0);
883 aun_send_response(ip->saddr, ah->handle, 4, 0);
887 * Handle incoming AUN transmit acknowledgements. If the sequence
888 * number matches something in our backlog then kill it and tell
889 * the user. If the remote took too long to reply then we may have
890 * dropped the packet already.
893 static void aun_tx_ack(unsigned long seq, int result)
899 spin_lock_irqsave(&aun_queue_lock, flags);
900 skb_queue_walk(&aun_queue, skb) {
901 eb = (struct ec_cb *)&skb->cb;
905 spin_unlock_irqrestore(&aun_queue_lock, flags);
906 printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq);
910 tx_result(skb->sk, eb->cookie, result);
911 skb_unlink(skb, &aun_queue);
912 spin_unlock_irqrestore(&aun_queue_lock, flags);
917 * Deal with received AUN frames - sort out what type of thing it is
918 * and hand it to the right function.
921 static void aun_data_available(struct sock *sk, int slen)
930 while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) {
931 if (err == -EAGAIN) {
932 printk(KERN_ERR "AUN: no data available?!");
935 printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err);
938 data = skb_transport_header(skb) + sizeof(struct udphdr);
939 ah = (struct aunhdr *)data;
940 len = skb->len - sizeof(struct udphdr);
946 aun_incoming(skb, ah, len);
949 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK);
952 aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING);
955 /* This isn't quite right yet. */
957 aun_send_response(ip->saddr, ah->handle, 6, ah->cb);
961 printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]);
964 skb_free_datagram(sk, skb);
968 * Called by the timer to manage the AUN transmit queue. If a packet
969 * was sent to a dead or nonexistent host then we will never get an
970 * acknowledgement back. After a few seconds we need to spot this and
974 static void ab_cleanup(unsigned long h)
976 struct sk_buff *skb, *n;
979 spin_lock_irqsave(&aun_queue_lock, flags);
980 skb_queue_walk_safe(&aun_queue, skb, n) {
981 struct ec_cb *eb = (struct ec_cb *)&skb->cb;
982 if ((jiffies - eb->start) > eb->timeout) {
983 tx_result(skb->sk, eb->cookie,
984 ECTYPE_TRANSMIT_NOT_PRESENT);
985 skb_unlink(skb, &aun_queue);
989 spin_unlock_irqrestore(&aun_queue_lock, flags);
991 mod_timer(&ab_cleanup_timer, jiffies + (HZ*2));
994 static int __init aun_udp_initialise(void)
997 struct sockaddr_in sin;
999 skb_queue_head_init(&aun_queue);
1000 spin_lock_init(&aun_queue_lock);
1001 setup_timer(&ab_cleanup_timer, ab_cleanup, 0);
1002 ab_cleanup_timer.expires = jiffies + (HZ*2);
1003 add_timer(&ab_cleanup_timer);
1005 memset(&sin, 0, sizeof(sin));
1006 sin.sin_port = htons(AUN_PORT);
1008 /* We can count ourselves lucky Acorn machines are too dim to
1010 if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0)
1012 printk("AUN: socket error %d\n", -error);
1016 udpsock->sk->sk_reuse = 1;
1017 udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it
1020 error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin,
1024 printk("AUN: bind error %d\n", -error);
1028 udpsock->sk->sk_data_ready = aun_data_available;
1033 sock_release(udpsock);
1039 #ifdef CONFIG_ECONET_NATIVE
1042 * Receive an Econet frame from a device.
1045 static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1047 struct ec_framehdr *hdr;
1049 struct ec_device *edev = dev->ec_ptr;
1051 if (!net_eq(dev_net(dev), &init_net))
1054 if (skb->pkt_type == PACKET_OTHERHOST)
1060 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1063 if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
1066 hdr = (struct ec_framehdr *) skb->data;
1068 /* First check for encapsulated IP */
1069 if (hdr->port == EC_PORT_IP) {
1070 skb->protocol = htons(ETH_P_IP);
1071 skb_pull(skb, sizeof(struct ec_framehdr));
1073 return NET_RX_SUCCESS;
1076 sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
1080 if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb,
1084 return NET_RX_SUCCESS;
1091 static struct packet_type econet_packet_type __read_mostly = {
1092 .type = cpu_to_be16(ETH_P_ECONET),
1096 static void econet_hw_initialise(void)
1098 dev_add_pack(&econet_packet_type);
1103 static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data)
1105 struct net_device *dev = (struct net_device *)data;
1106 struct ec_device *edev;
1108 if (!net_eq(dev_net(dev), &init_net))
1112 case NETDEV_UNREGISTER:
1113 /* A device has gone down - kill any data we hold for it. */
1117 if (net2dev_map[0] == dev)
1118 net2dev_map[0] = NULL;
1119 net2dev_map[edev->net] = NULL;
1129 static struct notifier_block econet_netdev_notifier = {
1130 .notifier_call =econet_notifier,
1133 static void __exit econet_proto_exit(void)
1135 #ifdef CONFIG_ECONET_AUNUDP
1136 del_timer(&ab_cleanup_timer);
1138 sock_release(udpsock);
1140 unregister_netdevice_notifier(&econet_netdev_notifier);
1141 #ifdef CONFIG_ECONET_NATIVE
1142 dev_remove_pack(&econet_packet_type);
1144 sock_unregister(econet_family_ops.family);
1145 proto_unregister(&econet_proto);
1148 static int __init econet_proto_init(void)
1150 int err = proto_register(&econet_proto, 0);
1154 sock_register(&econet_family_ops);
1155 #ifdef CONFIG_ECONET_AUNUDP
1156 spin_lock_init(&aun_queue_lock);
1157 aun_udp_initialise();
1159 #ifdef CONFIG_ECONET_NATIVE
1160 econet_hw_initialise();
1162 register_netdevice_notifier(&econet_netdev_notifier);
1167 module_init(econet_proto_init);
1168 module_exit(econet_proto_exit);
1170 MODULE_LICENSE("GPL");
1171 MODULE_ALIAS_NETPROTO(PF_ECONET);