2 * Copyright (c) 2015, Sony Mobile Communications Inc.
3 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 and
7 * only version 2 as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 #include <linux/module.h>
15 #include <linux/netlink.h>
16 #include <linux/qrtr.h>
17 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
23 #define QRTR_PROTO_VER 1
26 #define QRTR_MIN_EPH_SOCKET 0x4000
27 #define QRTR_MAX_EPH_SOCKET 0x7fff
33 QRTR_TYPE_NEW_SERVER = 4,
34 QRTR_TYPE_DEL_SERVER = 5,
35 QRTR_TYPE_DEL_CLIENT = 6,
36 QRTR_TYPE_RESUME_TX = 7,
42 * struct qrtr_hdr - (I|R)PCrouter packet header
43 * @version: protocol version
44 * @type: packet type; one of QRTR_TYPE_*
45 * @src_node_id: source node
46 * @src_port_id: source port
47 * @confirm_rx: boolean; whether a resume-tx packet should be send in reply
48 * @size: length of packet, excluding this header
49 * @dst_node_id: destination node
50 * @dst_port_id: destination port
63 #define QRTR_HDR_SIZE sizeof(struct qrtr_hdr)
64 #define QRTR_NODE_BCAST ((unsigned int)-1)
65 #define QRTR_PORT_CTRL ((unsigned int)-2)
68 /* WARNING: sk must be the first member */
70 struct sockaddr_qrtr us;
71 struct sockaddr_qrtr peer;
74 static inline struct qrtr_sock *qrtr_sk(struct sock *sk)
76 BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0);
77 return container_of(sk, struct qrtr_sock, sk);
80 static unsigned int qrtr_local_nid = -1;
83 static RADIX_TREE(qrtr_nodes, GFP_KERNEL);
85 static LIST_HEAD(qrtr_all_nodes);
86 /* lock for qrtr_nodes, qrtr_all_nodes and node reference */
87 static DEFINE_MUTEX(qrtr_node_lock);
89 /* local port allocation management */
90 static DEFINE_IDR(qrtr_ports);
91 static DEFINE_MUTEX(qrtr_port_lock);
94 * struct qrtr_node - endpoint node
95 * @ep_lock: lock for endpoint management and callbacks
97 * @ref: reference count for node
99 * @rx_queue: receive queue
100 * @work: scheduled work struct for recv work
101 * @item: list item for broadcast list
104 struct mutex ep_lock;
105 struct qrtr_endpoint *ep;
109 struct sk_buff_head rx_queue;
110 struct work_struct work;
111 struct list_head item;
114 /* Release node resources and free the node.
116 * Do not call directly, use qrtr_node_release. To be used with
117 * kref_put_mutex. As such, the node mutex is expected to be locked on call.
119 static void __qrtr_node_release(struct kref *kref)
121 struct qrtr_node *node = container_of(kref, struct qrtr_node, ref);
123 if (node->nid != QRTR_EP_NID_AUTO)
124 radix_tree_delete(&qrtr_nodes, node->nid);
126 list_del(&node->item);
127 mutex_unlock(&qrtr_node_lock);
129 cancel_work_sync(&node->work);
130 skb_queue_purge(&node->rx_queue);
134 /* Increment reference to node. */
135 static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node)
138 kref_get(&node->ref);
142 /* Decrement reference to node and release as necessary. */
143 static void qrtr_node_release(struct qrtr_node *node)
147 kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock);
150 /* Pass an outgoing packet socket buffer to the endpoint driver. */
151 static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb)
155 mutex_lock(&node->ep_lock);
157 rc = node->ep->xmit(node->ep, skb);
160 mutex_unlock(&node->ep_lock);
165 /* Lookup node by id.
167 * callers must release with qrtr_node_release()
169 static struct qrtr_node *qrtr_node_lookup(unsigned int nid)
171 struct qrtr_node *node;
173 mutex_lock(&qrtr_node_lock);
174 node = radix_tree_lookup(&qrtr_nodes, nid);
175 node = qrtr_node_acquire(node);
176 mutex_unlock(&qrtr_node_lock);
181 /* Assign node id to node.
183 * This is mostly useful for automatic node id assignment, based on
184 * the source id in the incoming packet.
186 static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
188 if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO)
191 mutex_lock(&qrtr_node_lock);
192 radix_tree_insert(&qrtr_nodes, nid, node);
194 mutex_unlock(&qrtr_node_lock);
198 * qrtr_endpoint_post() - post incoming data
199 * @ep: endpoint handle
200 * @data: data pointer
201 * @len: size of data in bytes
203 * Return: 0 on success; negative error code on failure
205 int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
207 struct qrtr_node *node = ep->node;
208 const struct qrtr_hdr *phdr = data;
216 if (len < QRTR_HDR_SIZE || len & 3)
219 ver = le32_to_cpu(phdr->version);
220 size = le32_to_cpu(phdr->size);
221 type = le32_to_cpu(phdr->type);
222 dst = le32_to_cpu(phdr->dst_port_id);
224 psize = (size + 3) & ~3;
226 if (ver != QRTR_PROTO_VER)
229 if (len != psize + QRTR_HDR_SIZE)
232 if (dst != QRTR_PORT_CTRL && type != QRTR_TYPE_DATA)
235 skb = __netdev_alloc_skb(NULL, len, GFP_ATOMIC | __GFP_NOWARN);
239 skb_reset_transport_header(skb);
240 memcpy(skb_put(skb, len), data, len);
242 skb_queue_tail(&node->rx_queue, skb);
243 schedule_work(&node->work);
247 EXPORT_SYMBOL_GPL(qrtr_endpoint_post);
249 /* Allocate and construct a resume-tx packet. */
250 static struct sk_buff *qrtr_alloc_resume_tx(u32 src_node,
251 u32 dst_node, u32 port)
253 const int pkt_len = 20;
254 struct qrtr_hdr *hdr;
258 skb = alloc_skb(QRTR_HDR_SIZE + pkt_len, GFP_KERNEL);
261 skb_reset_transport_header(skb);
263 hdr = (struct qrtr_hdr *)skb_put(skb, QRTR_HDR_SIZE);
264 hdr->version = cpu_to_le32(QRTR_PROTO_VER);
265 hdr->type = cpu_to_le32(QRTR_TYPE_RESUME_TX);
266 hdr->src_node_id = cpu_to_le32(src_node);
267 hdr->src_port_id = cpu_to_le32(QRTR_PORT_CTRL);
268 hdr->confirm_rx = cpu_to_le32(0);
269 hdr->size = cpu_to_le32(pkt_len);
270 hdr->dst_node_id = cpu_to_le32(dst_node);
271 hdr->dst_port_id = cpu_to_le32(QRTR_PORT_CTRL);
273 buf = (__le32 *)skb_put(skb, pkt_len);
274 memset(buf, 0, pkt_len);
275 buf[0] = cpu_to_le32(QRTR_TYPE_RESUME_TX);
276 buf[1] = cpu_to_le32(src_node);
277 buf[2] = cpu_to_le32(port);
282 static struct qrtr_sock *qrtr_port_lookup(int port);
283 static void qrtr_port_put(struct qrtr_sock *ipc);
285 /* Handle and route a received packet.
287 * This will auto-reply with resume-tx packet as necessary.
289 static void qrtr_node_rx_work(struct work_struct *work)
291 struct qrtr_node *node = container_of(work, struct qrtr_node, work);
294 while ((skb = skb_dequeue(&node->rx_queue)) != NULL) {
295 const struct qrtr_hdr *phdr;
296 u32 dst_node, dst_port;
297 struct qrtr_sock *ipc;
301 phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
302 src_node = le32_to_cpu(phdr->src_node_id);
303 dst_node = le32_to_cpu(phdr->dst_node_id);
304 dst_port = le32_to_cpu(phdr->dst_port_id);
305 confirm = !!phdr->confirm_rx;
307 qrtr_node_assign(node, src_node);
309 ipc = qrtr_port_lookup(dst_port);
313 if (sock_queue_rcv_skb(&ipc->sk, skb))
320 skb = qrtr_alloc_resume_tx(dst_node, node->nid, dst_port);
323 if (qrtr_node_enqueue(node, skb))
330 * qrtr_endpoint_register() - register a new endpoint
331 * @ep: endpoint to register
332 * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment
333 * Return: 0 on success; negative error code on failure
335 * The specified endpoint must have the xmit function pointer set on call.
337 int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid)
339 struct qrtr_node *node;
341 if (!ep || !ep->xmit)
344 node = kzalloc(sizeof(*node), GFP_KERNEL);
348 INIT_WORK(&node->work, qrtr_node_rx_work);
349 kref_init(&node->ref);
350 mutex_init(&node->ep_lock);
351 skb_queue_head_init(&node->rx_queue);
352 node->nid = QRTR_EP_NID_AUTO;
355 qrtr_node_assign(node, nid);
357 mutex_lock(&qrtr_node_lock);
358 list_add(&node->item, &qrtr_all_nodes);
359 mutex_unlock(&qrtr_node_lock);
364 EXPORT_SYMBOL_GPL(qrtr_endpoint_register);
367 * qrtr_endpoint_unregister - unregister endpoint
368 * @ep: endpoint to unregister
370 void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)
372 struct qrtr_node *node = ep->node;
374 mutex_lock(&node->ep_lock);
376 mutex_unlock(&node->ep_lock);
378 qrtr_node_release(node);
381 EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister);
383 /* Lookup socket by port.
385 * Callers must release with qrtr_port_put()
387 static struct qrtr_sock *qrtr_port_lookup(int port)
389 struct qrtr_sock *ipc;
391 if (port == QRTR_PORT_CTRL)
394 mutex_lock(&qrtr_port_lock);
395 ipc = idr_find(&qrtr_ports, port);
398 mutex_unlock(&qrtr_port_lock);
403 /* Release acquired socket. */
404 static void qrtr_port_put(struct qrtr_sock *ipc)
409 /* Remove port assignment. */
410 static void qrtr_port_remove(struct qrtr_sock *ipc)
412 int port = ipc->us.sq_port;
414 if (port == QRTR_PORT_CTRL)
417 __sock_put(&ipc->sk);
419 mutex_lock(&qrtr_port_lock);
420 idr_remove(&qrtr_ports, port);
421 mutex_unlock(&qrtr_port_lock);
424 /* Assign port number to socket.
426 * Specify port in the integer pointed to by port, and it will be adjusted
427 * on return as necesssary.
430 * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET]
431 * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN
432 * >QRTR_MIN_EPH_SOCKET: Specified; available to all
434 static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
438 mutex_lock(&qrtr_port_lock);
440 rc = idr_alloc(&qrtr_ports, ipc,
441 QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1,
445 } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
447 } else if (*port == QRTR_PORT_CTRL) {
448 rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC);
450 rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC);
454 mutex_unlock(&qrtr_port_lock);
466 /* Bind socket to address.
468 * Socket should be locked upon call.
470 static int __qrtr_bind(struct socket *sock,
471 const struct sockaddr_qrtr *addr, int zapped)
473 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
474 struct sock *sk = sock->sk;
479 if (!zapped && addr->sq_port == ipc->us.sq_port)
482 port = addr->sq_port;
483 rc = qrtr_port_assign(ipc, &port);
487 /* unbind previous, if any */
489 qrtr_port_remove(ipc);
490 ipc->us.sq_port = port;
492 sock_reset_flag(sk, SOCK_ZAPPED);
497 /* Auto bind to an ephemeral port. */
498 static int qrtr_autobind(struct socket *sock)
500 struct sock *sk = sock->sk;
501 struct sockaddr_qrtr addr;
503 if (!sock_flag(sk, SOCK_ZAPPED))
506 addr.sq_family = AF_QIPCRTR;
507 addr.sq_node = qrtr_local_nid;
510 return __qrtr_bind(sock, &addr, 1);
513 /* Bind socket to specified sockaddr. */
514 static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len)
516 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
517 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
518 struct sock *sk = sock->sk;
521 if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
524 if (addr->sq_node != ipc->us.sq_node)
528 rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED));
534 /* Queue packet to local peer socket. */
535 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb)
537 const struct qrtr_hdr *phdr;
538 struct qrtr_sock *ipc;
540 phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
542 ipc = qrtr_port_lookup(le32_to_cpu(phdr->dst_port_id));
543 if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */
548 if (sock_queue_rcv_skb(&ipc->sk, skb)) {
559 /* Queue packet for broadcast. */
560 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb)
562 struct sk_buff *skbn;
564 mutex_lock(&qrtr_node_lock);
565 list_for_each_entry(node, &qrtr_all_nodes, item) {
566 skbn = skb_clone(skb, GFP_KERNEL);
569 skb_set_owner_w(skbn, skb->sk);
570 qrtr_node_enqueue(node, skbn);
572 mutex_unlock(&qrtr_node_lock);
574 qrtr_local_enqueue(NULL, skb);
579 static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
581 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
582 int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *);
583 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
584 struct sock *sk = sock->sk;
585 struct qrtr_node *node;
586 struct qrtr_hdr *hdr;
591 if (msg->msg_flags & ~(MSG_DONTWAIT))
600 if (msg->msg_namelen < sizeof(*addr)) {
605 if (addr->sq_family != AF_QIPCRTR) {
610 rc = qrtr_autobind(sock);
615 } else if (sk->sk_state == TCP_ESTABLISHED) {
623 if (addr->sq_node == QRTR_NODE_BCAST) {
624 if (addr->sq_port != QRTR_PORT_CTRL &&
625 qrtr_local_nid != QRTR_NODE_BCAST) {
629 enqueue_fn = qrtr_bcast_enqueue;
630 } else if (addr->sq_node == ipc->us.sq_node) {
631 enqueue_fn = qrtr_local_enqueue;
633 node = qrtr_node_lookup(addr->sq_node);
638 enqueue_fn = qrtr_node_enqueue;
641 plen = (len + 3) & ~3;
642 skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_SIZE,
643 msg->msg_flags & MSG_DONTWAIT, &rc);
647 skb_reset_transport_header(skb);
648 skb_put(skb, len + QRTR_HDR_SIZE);
650 hdr = (struct qrtr_hdr *)skb_transport_header(skb);
651 hdr->version = cpu_to_le32(QRTR_PROTO_VER);
652 hdr->src_node_id = cpu_to_le32(ipc->us.sq_node);
653 hdr->src_port_id = cpu_to_le32(ipc->us.sq_port);
654 hdr->confirm_rx = cpu_to_le32(0);
655 hdr->size = cpu_to_le32(len);
656 hdr->dst_node_id = cpu_to_le32(addr->sq_node);
657 hdr->dst_port_id = cpu_to_le32(addr->sq_port);
659 rc = skb_copy_datagram_from_iter(skb, QRTR_HDR_SIZE,
660 &msg->msg_iter, len);
667 skb_pad(skb, plen - len);
668 skb_put(skb, plen - len);
671 if (ipc->us.sq_port == QRTR_PORT_CTRL) {
678 /* control messages already require the type as 'command' */
679 skb_copy_bits(skb, QRTR_HDR_SIZE, &hdr->type, 4);
681 hdr->type = cpu_to_le32(QRTR_TYPE_DATA);
684 rc = enqueue_fn(node, skb);
689 qrtr_node_release(node);
695 static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg,
696 size_t size, int flags)
698 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
699 const struct qrtr_hdr *phdr;
700 struct sock *sk = sock->sk;
706 if (sock_flag(sk, SOCK_ZAPPED)) {
708 return -EADDRNOTAVAIL;
711 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
712 flags & MSG_DONTWAIT, &rc);
718 phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
719 copied = le32_to_cpu(phdr->size);
722 msg->msg_flags |= MSG_TRUNC;
725 rc = skb_copy_datagram_msg(skb, QRTR_HDR_SIZE, msg, copied);
731 /* There is an anonymous 2-byte hole after sq_family,
732 * make sure to clear it.
734 memset(addr, 0, sizeof(*addr));
736 addr->sq_family = AF_QIPCRTR;
737 addr->sq_node = le32_to_cpu(phdr->src_node_id);
738 addr->sq_port = le32_to_cpu(phdr->src_port_id);
739 msg->msg_namelen = sizeof(*addr);
743 skb_free_datagram(sk, skb);
749 static int qrtr_connect(struct socket *sock, struct sockaddr *saddr,
752 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
753 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
754 struct sock *sk = sock->sk;
757 if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
762 sk->sk_state = TCP_CLOSE;
763 sock->state = SS_UNCONNECTED;
765 rc = qrtr_autobind(sock);
772 sock->state = SS_CONNECTED;
773 sk->sk_state = TCP_ESTABLISHED;
780 static int qrtr_getname(struct socket *sock, struct sockaddr *saddr,
783 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
784 struct sockaddr_qrtr qaddr;
785 struct sock *sk = sock->sk;
789 if (sk->sk_state != TCP_ESTABLISHED) {
800 *len = sizeof(qaddr);
801 qaddr.sq_family = AF_QIPCRTR;
803 memcpy(saddr, &qaddr, sizeof(qaddr));
808 static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
810 void __user *argp = (void __user *)arg;
811 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
812 struct sock *sk = sock->sk;
813 struct sockaddr_qrtr *sq;
823 len = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
826 rc = put_user(len, (int __user *)argp);
829 skb = skb_peek(&sk->sk_receive_queue);
831 len = skb->len - QRTR_HDR_SIZE;
832 rc = put_user(len, (int __user *)argp);
835 if (copy_from_user(&ifr, argp, sizeof(ifr))) {
840 sq = (struct sockaddr_qrtr *)&ifr.ifr_addr;
842 if (copy_to_user(argp, &ifr, sizeof(ifr))) {
848 rc = sock_get_timestamp(sk, argp);
871 static int qrtr_release(struct socket *sock)
873 struct sock *sk = sock->sk;
874 struct qrtr_sock *ipc;
882 sk->sk_shutdown = SHUTDOWN_MASK;
883 if (!sock_flag(sk, SOCK_DEAD))
884 sk->sk_state_change(sk);
886 sock_set_flag(sk, SOCK_DEAD);
889 if (!sock_flag(sk, SOCK_ZAPPED))
890 qrtr_port_remove(ipc);
892 skb_queue_purge(&sk->sk_receive_queue);
900 static const struct proto_ops qrtr_proto_ops = {
901 .owner = THIS_MODULE,
902 .family = AF_QIPCRTR,
904 .connect = qrtr_connect,
905 .socketpair = sock_no_socketpair,
906 .accept = sock_no_accept,
907 .listen = sock_no_listen,
908 .sendmsg = qrtr_sendmsg,
909 .recvmsg = qrtr_recvmsg,
910 .getname = qrtr_getname,
912 .poll = datagram_poll,
913 .shutdown = sock_no_shutdown,
914 .setsockopt = sock_no_setsockopt,
915 .getsockopt = sock_no_getsockopt,
916 .release = qrtr_release,
917 .mmap = sock_no_mmap,
918 .sendpage = sock_no_sendpage,
921 static struct proto qrtr_proto = {
923 .owner = THIS_MODULE,
924 .obj_size = sizeof(struct qrtr_sock),
927 static int qrtr_create(struct net *net, struct socket *sock,
928 int protocol, int kern)
930 struct qrtr_sock *ipc;
933 if (sock->type != SOCK_DGRAM)
936 sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern);
940 sock_set_flag(sk, SOCK_ZAPPED);
942 sock_init_data(sock, sk);
943 sock->ops = &qrtr_proto_ops;
946 ipc->us.sq_family = AF_QIPCRTR;
947 ipc->us.sq_node = qrtr_local_nid;
953 static const struct nla_policy qrtr_policy[IFA_MAX + 1] = {
954 [IFA_LOCAL] = { .type = NLA_U32 },
957 static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
959 struct nlattr *tb[IFA_MAX + 1];
960 struct ifaddrmsg *ifm;
963 if (!netlink_capable(skb, CAP_NET_ADMIN))
966 if (!netlink_capable(skb, CAP_SYS_ADMIN))
971 rc = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, qrtr_policy);
975 ifm = nlmsg_data(nlh);
979 qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]);
983 static const struct net_proto_family qrtr_family = {
984 .owner = THIS_MODULE,
985 .family = AF_QIPCRTR,
986 .create = qrtr_create,
989 static int __init qrtr_proto_init(void)
993 rc = proto_register(&qrtr_proto, 1);
997 rc = sock_register(&qrtr_family);
999 proto_unregister(&qrtr_proto);
1003 rtnl_register(PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, NULL);
1007 module_init(qrtr_proto_init);
1009 static void __exit qrtr_proto_fini(void)
1011 rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR);
1012 sock_unregister(qrtr_family.family);
1013 proto_unregister(&qrtr_proto);
1015 module_exit(qrtr_proto_fini);
1017 MODULE_DESCRIPTION("Qualcomm IPC-router driver");
1018 MODULE_LICENSE("GPL v2");