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 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb);
115 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb);
117 /* Release node resources and free the node.
119 * Do not call directly, use qrtr_node_release. To be used with
120 * kref_put_mutex. As such, the node mutex is expected to be locked on call.
122 static void __qrtr_node_release(struct kref *kref)
124 struct qrtr_node *node = container_of(kref, struct qrtr_node, ref);
126 if (node->nid != QRTR_EP_NID_AUTO)
127 radix_tree_delete(&qrtr_nodes, node->nid);
129 list_del(&node->item);
130 mutex_unlock(&qrtr_node_lock);
132 skb_queue_purge(&node->rx_queue);
136 /* Increment reference to node. */
137 static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node)
140 kref_get(&node->ref);
144 /* Decrement reference to node and release as necessary. */
145 static void qrtr_node_release(struct qrtr_node *node)
149 kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock);
152 /* Pass an outgoing packet socket buffer to the endpoint driver. */
153 static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb)
157 mutex_lock(&node->ep_lock);
159 rc = node->ep->xmit(node->ep, skb);
162 mutex_unlock(&node->ep_lock);
167 /* Lookup node by id.
169 * callers must release with qrtr_node_release()
171 static struct qrtr_node *qrtr_node_lookup(unsigned int nid)
173 struct qrtr_node *node;
175 mutex_lock(&qrtr_node_lock);
176 node = radix_tree_lookup(&qrtr_nodes, nid);
177 node = qrtr_node_acquire(node);
178 mutex_unlock(&qrtr_node_lock);
183 /* Assign node id to node.
185 * This is mostly useful for automatic node id assignment, based on
186 * the source id in the incoming packet.
188 static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
190 if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO)
193 mutex_lock(&qrtr_node_lock);
194 radix_tree_insert(&qrtr_nodes, nid, node);
196 mutex_unlock(&qrtr_node_lock);
200 * qrtr_endpoint_post() - post incoming data
201 * @ep: endpoint handle
202 * @data: data pointer
203 * @len: size of data in bytes
205 * Return: 0 on success; negative error code on failure
207 int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
209 struct qrtr_node *node = ep->node;
210 const struct qrtr_hdr *phdr = data;
218 if (len < QRTR_HDR_SIZE || len & 3)
221 ver = le32_to_cpu(phdr->version);
222 size = le32_to_cpu(phdr->size);
223 type = le32_to_cpu(phdr->type);
224 dst = le32_to_cpu(phdr->dst_port_id);
226 psize = (size + 3) & ~3;
228 if (ver != QRTR_PROTO_VER)
231 if (len != psize + QRTR_HDR_SIZE)
234 if (dst != QRTR_PORT_CTRL && type != QRTR_TYPE_DATA)
237 skb = netdev_alloc_skb(NULL, len);
241 skb_reset_transport_header(skb);
242 skb_put_data(skb, data, len);
244 skb_queue_tail(&node->rx_queue, skb);
245 schedule_work(&node->work);
249 EXPORT_SYMBOL_GPL(qrtr_endpoint_post);
251 static struct sk_buff *qrtr_alloc_ctrl_packet(u32 type, size_t pkt_len,
252 u32 src_node, u32 dst_node)
254 struct qrtr_hdr *hdr;
257 skb = alloc_skb(QRTR_HDR_SIZE + pkt_len, GFP_KERNEL);
260 skb_reset_transport_header(skb);
262 hdr = skb_put(skb, QRTR_HDR_SIZE);
263 hdr->version = cpu_to_le32(QRTR_PROTO_VER);
264 hdr->type = cpu_to_le32(type);
265 hdr->src_node_id = cpu_to_le32(src_node);
266 hdr->src_port_id = cpu_to_le32(QRTR_PORT_CTRL);
267 hdr->confirm_rx = cpu_to_le32(0);
268 hdr->size = cpu_to_le32(pkt_len);
269 hdr->dst_node_id = cpu_to_le32(dst_node);
270 hdr->dst_port_id = cpu_to_le32(QRTR_PORT_CTRL);
275 /* Allocate and construct a resume-tx packet. */
276 static struct sk_buff *qrtr_alloc_resume_tx(u32 src_node,
277 u32 dst_node, u32 port)
279 const int pkt_len = 20;
283 skb = qrtr_alloc_ctrl_packet(QRTR_TYPE_RESUME_TX, pkt_len,
288 buf = skb_put_zero(skb, pkt_len);
289 buf[0] = cpu_to_le32(QRTR_TYPE_RESUME_TX);
290 buf[1] = cpu_to_le32(src_node);
291 buf[2] = cpu_to_le32(port);
296 /* Allocate and construct a BYE message to signal remote termination */
297 static struct sk_buff *qrtr_alloc_local_bye(u32 src_node)
299 const int pkt_len = 20;
303 skb = qrtr_alloc_ctrl_packet(QRTR_TYPE_BYE, pkt_len,
304 src_node, qrtr_local_nid);
308 buf = skb_put_zero(skb, pkt_len);
309 buf[0] = cpu_to_le32(QRTR_TYPE_BYE);
314 static struct sk_buff *qrtr_alloc_del_client(struct sockaddr_qrtr *sq)
316 const int pkt_len = 20;
320 skb = qrtr_alloc_ctrl_packet(QRTR_TYPE_DEL_CLIENT, pkt_len,
321 sq->sq_node, QRTR_NODE_BCAST);
325 buf = skb_put_zero(skb, pkt_len);
326 buf[0] = cpu_to_le32(QRTR_TYPE_DEL_CLIENT);
327 buf[1] = cpu_to_le32(sq->sq_node);
328 buf[2] = cpu_to_le32(sq->sq_port);
333 static struct qrtr_sock *qrtr_port_lookup(int port);
334 static void qrtr_port_put(struct qrtr_sock *ipc);
336 /* Handle and route a received packet.
338 * This will auto-reply with resume-tx packet as necessary.
340 static void qrtr_node_rx_work(struct work_struct *work)
342 struct qrtr_node *node = container_of(work, struct qrtr_node, work);
345 while ((skb = skb_dequeue(&node->rx_queue)) != NULL) {
346 const struct qrtr_hdr *phdr;
347 u32 dst_node, dst_port;
348 struct qrtr_sock *ipc;
352 phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
353 src_node = le32_to_cpu(phdr->src_node_id);
354 dst_node = le32_to_cpu(phdr->dst_node_id);
355 dst_port = le32_to_cpu(phdr->dst_port_id);
356 confirm = !!phdr->confirm_rx;
358 qrtr_node_assign(node, src_node);
360 ipc = qrtr_port_lookup(dst_port);
364 if (sock_queue_rcv_skb(&ipc->sk, skb))
371 skb = qrtr_alloc_resume_tx(dst_node, node->nid, dst_port);
374 if (qrtr_node_enqueue(node, skb))
381 * qrtr_endpoint_register() - register a new endpoint
382 * @ep: endpoint to register
383 * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment
384 * Return: 0 on success; negative error code on failure
386 * The specified endpoint must have the xmit function pointer set on call.
388 int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid)
390 struct qrtr_node *node;
392 if (!ep || !ep->xmit)
395 node = kzalloc(sizeof(*node), GFP_KERNEL);
399 INIT_WORK(&node->work, qrtr_node_rx_work);
400 kref_init(&node->ref);
401 mutex_init(&node->ep_lock);
402 skb_queue_head_init(&node->rx_queue);
403 node->nid = QRTR_EP_NID_AUTO;
406 qrtr_node_assign(node, nid);
408 mutex_lock(&qrtr_node_lock);
409 list_add(&node->item, &qrtr_all_nodes);
410 mutex_unlock(&qrtr_node_lock);
415 EXPORT_SYMBOL_GPL(qrtr_endpoint_register);
418 * qrtr_endpoint_unregister - unregister endpoint
419 * @ep: endpoint to unregister
421 void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)
423 struct qrtr_node *node = ep->node;
426 mutex_lock(&node->ep_lock);
428 mutex_unlock(&node->ep_lock);
430 /* Notify the local controller about the event */
431 skb = qrtr_alloc_local_bye(node->nid);
433 qrtr_local_enqueue(NULL, skb);
435 qrtr_node_release(node);
438 EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister);
440 /* Lookup socket by port.
442 * Callers must release with qrtr_port_put()
444 static struct qrtr_sock *qrtr_port_lookup(int port)
446 struct qrtr_sock *ipc;
448 if (port == QRTR_PORT_CTRL)
451 mutex_lock(&qrtr_port_lock);
452 ipc = idr_find(&qrtr_ports, port);
455 mutex_unlock(&qrtr_port_lock);
460 /* Release acquired socket. */
461 static void qrtr_port_put(struct qrtr_sock *ipc)
466 /* Remove port assignment. */
467 static void qrtr_port_remove(struct qrtr_sock *ipc)
470 int port = ipc->us.sq_port;
472 skb = qrtr_alloc_del_client(&ipc->us);
474 skb_set_owner_w(skb, &ipc->sk);
475 qrtr_bcast_enqueue(NULL, skb);
478 if (port == QRTR_PORT_CTRL)
481 __sock_put(&ipc->sk);
483 mutex_lock(&qrtr_port_lock);
484 idr_remove(&qrtr_ports, port);
485 mutex_unlock(&qrtr_port_lock);
488 /* Assign port number to socket.
490 * Specify port in the integer pointed to by port, and it will be adjusted
491 * on return as necesssary.
494 * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET]
495 * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN
496 * >QRTR_MIN_EPH_SOCKET: Specified; available to all
498 static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
502 mutex_lock(&qrtr_port_lock);
504 rc = idr_alloc(&qrtr_ports, ipc,
505 QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1,
509 } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
511 } else if (*port == QRTR_PORT_CTRL) {
512 rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC);
514 rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC);
518 mutex_unlock(&qrtr_port_lock);
530 /* Reset all non-control ports */
531 static void qrtr_reset_ports(void)
533 struct qrtr_sock *ipc;
536 mutex_lock(&qrtr_port_lock);
537 idr_for_each_entry(&qrtr_ports, ipc, id) {
538 /* Don't reset control port */
543 ipc->sk.sk_err = ENETRESET;
544 wake_up_interruptible(sk_sleep(&ipc->sk));
547 mutex_unlock(&qrtr_port_lock);
550 /* Bind socket to address.
552 * Socket should be locked upon call.
554 static int __qrtr_bind(struct socket *sock,
555 const struct sockaddr_qrtr *addr, int zapped)
557 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
558 struct sock *sk = sock->sk;
563 if (!zapped && addr->sq_port == ipc->us.sq_port)
566 port = addr->sq_port;
567 rc = qrtr_port_assign(ipc, &port);
571 /* unbind previous, if any */
573 qrtr_port_remove(ipc);
574 ipc->us.sq_port = port;
576 sock_reset_flag(sk, SOCK_ZAPPED);
578 /* Notify all open ports about the new controller */
579 if (port == QRTR_PORT_CTRL)
585 /* Auto bind to an ephemeral port. */
586 static int qrtr_autobind(struct socket *sock)
588 struct sock *sk = sock->sk;
589 struct sockaddr_qrtr addr;
591 if (!sock_flag(sk, SOCK_ZAPPED))
594 addr.sq_family = AF_QIPCRTR;
595 addr.sq_node = qrtr_local_nid;
598 return __qrtr_bind(sock, &addr, 1);
601 /* Bind socket to specified sockaddr. */
602 static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len)
604 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
605 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
606 struct sock *sk = sock->sk;
609 if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
612 if (addr->sq_node != ipc->us.sq_node)
616 rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED));
622 /* Queue packet to local peer socket. */
623 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb)
625 const struct qrtr_hdr *phdr;
626 struct qrtr_sock *ipc;
628 phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
630 ipc = qrtr_port_lookup(le32_to_cpu(phdr->dst_port_id));
631 if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */
636 if (sock_queue_rcv_skb(&ipc->sk, skb)) {
647 /* Queue packet for broadcast. */
648 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb)
650 struct sk_buff *skbn;
652 mutex_lock(&qrtr_node_lock);
653 list_for_each_entry(node, &qrtr_all_nodes, item) {
654 skbn = skb_clone(skb, GFP_KERNEL);
657 skb_set_owner_w(skbn, skb->sk);
658 qrtr_node_enqueue(node, skbn);
660 mutex_unlock(&qrtr_node_lock);
662 qrtr_local_enqueue(node, skb);
667 static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
669 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
670 int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *);
671 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
672 struct sock *sk = sock->sk;
673 struct qrtr_node *node;
674 struct qrtr_hdr *hdr;
679 if (msg->msg_flags & ~(MSG_DONTWAIT))
688 if (msg->msg_namelen < sizeof(*addr)) {
693 if (addr->sq_family != AF_QIPCRTR) {
698 rc = qrtr_autobind(sock);
703 } else if (sk->sk_state == TCP_ESTABLISHED) {
711 if (addr->sq_node == QRTR_NODE_BCAST) {
712 enqueue_fn = qrtr_bcast_enqueue;
713 } else if (addr->sq_node == ipc->us.sq_node) {
714 enqueue_fn = qrtr_local_enqueue;
716 enqueue_fn = qrtr_node_enqueue;
717 node = qrtr_node_lookup(addr->sq_node);
724 plen = (len + 3) & ~3;
725 skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_SIZE,
726 msg->msg_flags & MSG_DONTWAIT, &rc);
730 skb_reset_transport_header(skb);
731 skb_put(skb, len + QRTR_HDR_SIZE);
733 hdr = (struct qrtr_hdr *)skb_transport_header(skb);
734 hdr->version = cpu_to_le32(QRTR_PROTO_VER);
735 hdr->src_node_id = cpu_to_le32(ipc->us.sq_node);
736 hdr->src_port_id = cpu_to_le32(ipc->us.sq_port);
737 hdr->confirm_rx = cpu_to_le32(0);
738 hdr->size = cpu_to_le32(len);
739 hdr->dst_node_id = cpu_to_le32(addr->sq_node);
740 hdr->dst_port_id = cpu_to_le32(addr->sq_port);
742 rc = skb_copy_datagram_from_iter(skb, QRTR_HDR_SIZE,
743 &msg->msg_iter, len);
750 rc = skb_pad(skb, plen - len);
753 skb_put(skb, plen - len);
756 if (ipc->us.sq_port == QRTR_PORT_CTRL) {
763 /* control messages already require the type as 'command' */
764 skb_copy_bits(skb, QRTR_HDR_SIZE, &hdr->type, 4);
766 hdr->type = cpu_to_le32(QRTR_TYPE_DATA);
769 rc = enqueue_fn(node, skb);
774 qrtr_node_release(node);
780 static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg,
781 size_t size, int flags)
783 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
784 const struct qrtr_hdr *phdr;
785 struct sock *sk = sock->sk;
791 if (sock_flag(sk, SOCK_ZAPPED)) {
793 return -EADDRNOTAVAIL;
796 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
797 flags & MSG_DONTWAIT, &rc);
803 phdr = (const struct qrtr_hdr *)skb_transport_header(skb);
804 copied = le32_to_cpu(phdr->size);
807 msg->msg_flags |= MSG_TRUNC;
810 rc = skb_copy_datagram_msg(skb, QRTR_HDR_SIZE, msg, copied);
816 addr->sq_family = AF_QIPCRTR;
817 addr->sq_node = le32_to_cpu(phdr->src_node_id);
818 addr->sq_port = le32_to_cpu(phdr->src_port_id);
819 msg->msg_namelen = sizeof(*addr);
823 skb_free_datagram(sk, skb);
829 static int qrtr_connect(struct socket *sock, struct sockaddr *saddr,
832 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
833 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
834 struct sock *sk = sock->sk;
837 if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
842 sk->sk_state = TCP_CLOSE;
843 sock->state = SS_UNCONNECTED;
845 rc = qrtr_autobind(sock);
852 sock->state = SS_CONNECTED;
853 sk->sk_state = TCP_ESTABLISHED;
860 static int qrtr_getname(struct socket *sock, struct sockaddr *saddr,
863 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
864 struct sockaddr_qrtr qaddr;
865 struct sock *sk = sock->sk;
869 if (sk->sk_state != TCP_ESTABLISHED) {
880 *len = sizeof(qaddr);
881 qaddr.sq_family = AF_QIPCRTR;
883 memcpy(saddr, &qaddr, sizeof(qaddr));
888 static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
890 void __user *argp = (void __user *)arg;
891 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
892 struct sock *sk = sock->sk;
893 struct sockaddr_qrtr *sq;
903 len = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
906 rc = put_user(len, (int __user *)argp);
909 skb = skb_peek(&sk->sk_receive_queue);
911 len = skb->len - QRTR_HDR_SIZE;
912 rc = put_user(len, (int __user *)argp);
915 if (copy_from_user(&ifr, argp, sizeof(ifr))) {
920 sq = (struct sockaddr_qrtr *)&ifr.ifr_addr;
922 if (copy_to_user(argp, &ifr, sizeof(ifr))) {
928 rc = sock_get_timestamp(sk, argp);
951 static int qrtr_release(struct socket *sock)
953 struct sock *sk = sock->sk;
954 struct qrtr_sock *ipc;
962 sk->sk_shutdown = SHUTDOWN_MASK;
963 if (!sock_flag(sk, SOCK_DEAD))
964 sk->sk_state_change(sk);
966 sock_set_flag(sk, SOCK_DEAD);
969 if (!sock_flag(sk, SOCK_ZAPPED))
970 qrtr_port_remove(ipc);
972 skb_queue_purge(&sk->sk_receive_queue);
980 static const struct proto_ops qrtr_proto_ops = {
981 .owner = THIS_MODULE,
982 .family = AF_QIPCRTR,
984 .connect = qrtr_connect,
985 .socketpair = sock_no_socketpair,
986 .accept = sock_no_accept,
987 .listen = sock_no_listen,
988 .sendmsg = qrtr_sendmsg,
989 .recvmsg = qrtr_recvmsg,
990 .getname = qrtr_getname,
992 .poll = datagram_poll,
993 .shutdown = sock_no_shutdown,
994 .setsockopt = sock_no_setsockopt,
995 .getsockopt = sock_no_getsockopt,
996 .release = qrtr_release,
997 .mmap = sock_no_mmap,
998 .sendpage = sock_no_sendpage,
1001 static struct proto qrtr_proto = {
1003 .owner = THIS_MODULE,
1004 .obj_size = sizeof(struct qrtr_sock),
1007 static int qrtr_create(struct net *net, struct socket *sock,
1008 int protocol, int kern)
1010 struct qrtr_sock *ipc;
1013 if (sock->type != SOCK_DGRAM)
1016 sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern);
1020 sock_set_flag(sk, SOCK_ZAPPED);
1022 sock_init_data(sock, sk);
1023 sock->ops = &qrtr_proto_ops;
1026 ipc->us.sq_family = AF_QIPCRTR;
1027 ipc->us.sq_node = qrtr_local_nid;
1028 ipc->us.sq_port = 0;
1033 static const struct nla_policy qrtr_policy[IFA_MAX + 1] = {
1034 [IFA_LOCAL] = { .type = NLA_U32 },
1037 static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1038 struct netlink_ext_ack *extack)
1040 struct nlattr *tb[IFA_MAX + 1];
1041 struct ifaddrmsg *ifm;
1044 if (!netlink_capable(skb, CAP_NET_ADMIN))
1047 if (!netlink_capable(skb, CAP_SYS_ADMIN))
1052 rc = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, qrtr_policy, extack);
1056 ifm = nlmsg_data(nlh);
1060 qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]);
1064 static const struct net_proto_family qrtr_family = {
1065 .owner = THIS_MODULE,
1066 .family = AF_QIPCRTR,
1067 .create = qrtr_create,
1070 static int __init qrtr_proto_init(void)
1074 rc = proto_register(&qrtr_proto, 1);
1078 rc = sock_register(&qrtr_family);
1080 proto_unregister(&qrtr_proto);
1084 rtnl_register(PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, NULL);
1088 module_init(qrtr_proto_init);
1090 static void __exit qrtr_proto_fini(void)
1092 rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR);
1093 sock_unregister(qrtr_family.family);
1094 proto_unregister(&qrtr_proto);
1096 module_exit(qrtr_proto_fini);
1098 MODULE_DESCRIPTION("Qualcomm IPC-router driver");
1099 MODULE_LICENSE("GPL v2");