1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, Sony Mobile Communications Inc.
4 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
6 #include <linux/module.h>
7 #include <linux/netlink.h>
8 #include <linux/qrtr.h>
9 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
10 #include <linux/numa.h>
16 #define QRTR_PROTO_VER_1 1
17 #define QRTR_PROTO_VER_2 3
20 #define QRTR_MIN_EPH_SOCKET 0x4000
21 #define QRTR_MAX_EPH_SOCKET 0x7fff
24 * struct qrtr_hdr_v1 - (I|R)PCrouter packet header version 1
25 * @version: protocol version
26 * @type: packet type; one of QRTR_TYPE_*
27 * @src_node_id: source node
28 * @src_port_id: source port
29 * @confirm_rx: boolean; whether a resume-tx packet should be send in reply
30 * @size: length of packet, excluding this header
31 * @dst_node_id: destination node
32 * @dst_port_id: destination port
46 * struct qrtr_hdr_v2 - (I|R)PCrouter packet header later versions
47 * @version: protocol version
48 * @type: packet type; one of QRTR_TYPE_*
49 * @flags: bitmask of QRTR_FLAGS_*
50 * @optlen: length of optional header data
51 * @size: length of packet, excluding this header and optlen
52 * @src_node_id: source node
53 * @src_port_id: source port
54 * @dst_node_id: destination node
55 * @dst_port_id: destination port
69 #define QRTR_FLAGS_CONFIRM_RX BIT(0)
81 #define QRTR_HDR_MAX_SIZE max_t(size_t, sizeof(struct qrtr_hdr_v1), \
82 sizeof(struct qrtr_hdr_v2))
85 /* WARNING: sk must be the first member */
87 struct sockaddr_qrtr us;
88 struct sockaddr_qrtr peer;
91 static inline struct qrtr_sock *qrtr_sk(struct sock *sk)
93 BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0);
94 return container_of(sk, struct qrtr_sock, sk);
97 static unsigned int qrtr_local_nid = NUMA_NO_NODE;
100 static RADIX_TREE(qrtr_nodes, GFP_KERNEL);
102 static LIST_HEAD(qrtr_all_nodes);
103 /* lock for qrtr_nodes, qrtr_all_nodes and node reference */
104 static DEFINE_MUTEX(qrtr_node_lock);
106 /* local port allocation management */
107 static DEFINE_IDR(qrtr_ports);
108 static DEFINE_MUTEX(qrtr_port_lock);
111 * struct qrtr_node - endpoint node
112 * @ep_lock: lock for endpoint management and callbacks
114 * @ref: reference count for node
116 * @rx_queue: receive queue
117 * @work: scheduled work struct for recv work
118 * @item: list item for broadcast list
121 struct mutex ep_lock;
122 struct qrtr_endpoint *ep;
126 struct sk_buff_head rx_queue;
127 struct work_struct work;
128 struct list_head item;
131 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb,
132 int type, struct sockaddr_qrtr *from,
133 struct sockaddr_qrtr *to);
134 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb,
135 int type, struct sockaddr_qrtr *from,
136 struct sockaddr_qrtr *to);
138 /* Release node resources and free the node.
140 * Do not call directly, use qrtr_node_release. To be used with
141 * kref_put_mutex. As such, the node mutex is expected to be locked on call.
143 static void __qrtr_node_release(struct kref *kref)
145 struct qrtr_node *node = container_of(kref, struct qrtr_node, ref);
147 if (node->nid != QRTR_EP_NID_AUTO)
148 radix_tree_delete(&qrtr_nodes, node->nid);
150 list_del(&node->item);
151 mutex_unlock(&qrtr_node_lock);
153 cancel_work_sync(&node->work);
154 skb_queue_purge(&node->rx_queue);
158 /* Increment reference to node. */
159 static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node)
162 kref_get(&node->ref);
166 /* Decrement reference to node and release as necessary. */
167 static void qrtr_node_release(struct qrtr_node *node)
171 kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock);
174 /* Pass an outgoing packet socket buffer to the endpoint driver. */
175 static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb,
176 int type, struct sockaddr_qrtr *from,
177 struct sockaddr_qrtr *to)
179 struct qrtr_hdr_v1 *hdr;
180 size_t len = skb->len;
183 hdr = skb_push(skb, sizeof(*hdr));
184 hdr->version = cpu_to_le32(QRTR_PROTO_VER_1);
185 hdr->type = cpu_to_le32(type);
186 hdr->src_node_id = cpu_to_le32(from->sq_node);
187 hdr->src_port_id = cpu_to_le32(from->sq_port);
188 if (to->sq_port == QRTR_PORT_CTRL) {
189 hdr->dst_node_id = cpu_to_le32(node->nid);
190 hdr->dst_port_id = cpu_to_le32(QRTR_PORT_CTRL);
192 hdr->dst_node_id = cpu_to_le32(to->sq_node);
193 hdr->dst_port_id = cpu_to_le32(to->sq_port);
196 hdr->size = cpu_to_le32(len);
199 rc = skb_put_padto(skb, ALIGN(len, 4) + sizeof(*hdr));
202 mutex_lock(&node->ep_lock);
205 rc = node->ep->xmit(node->ep, skb);
208 mutex_unlock(&node->ep_lock);
213 /* Lookup node by id.
215 * callers must release with qrtr_node_release()
217 static struct qrtr_node *qrtr_node_lookup(unsigned int nid)
219 struct qrtr_node *node;
221 mutex_lock(&qrtr_node_lock);
222 node = radix_tree_lookup(&qrtr_nodes, nid);
223 node = qrtr_node_acquire(node);
224 mutex_unlock(&qrtr_node_lock);
229 /* Assign node id to node.
231 * This is mostly useful for automatic node id assignment, based on
232 * the source id in the incoming packet.
234 static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
236 if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO)
239 mutex_lock(&qrtr_node_lock);
240 radix_tree_insert(&qrtr_nodes, nid, node);
242 mutex_unlock(&qrtr_node_lock);
246 * qrtr_endpoint_post() - post incoming data
247 * @ep: endpoint handle
248 * @data: data pointer
249 * @len: size of data in bytes
251 * Return: 0 on success; negative error code on failure
253 int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
255 struct qrtr_node *node = ep->node;
256 const struct qrtr_hdr_v1 *v1;
257 const struct qrtr_hdr_v2 *v2;
264 if (len == 0 || len & 3)
267 skb = __netdev_alloc_skb(NULL, len, GFP_ATOMIC | __GFP_NOWARN);
271 cb = (struct qrtr_cb *)skb->cb;
273 /* Version field in v1 is little endian, so this works for both cases */
277 case QRTR_PROTO_VER_1:
278 if (len < sizeof(*v1))
281 hdrlen = sizeof(*v1);
283 cb->type = le32_to_cpu(v1->type);
284 cb->src_node = le32_to_cpu(v1->src_node_id);
285 cb->src_port = le32_to_cpu(v1->src_port_id);
286 cb->confirm_rx = !!v1->confirm_rx;
287 cb->dst_node = le32_to_cpu(v1->dst_node_id);
288 cb->dst_port = le32_to_cpu(v1->dst_port_id);
290 size = le32_to_cpu(v1->size);
292 case QRTR_PROTO_VER_2:
293 if (len < sizeof(*v2))
296 hdrlen = sizeof(*v2) + v2->optlen;
299 cb->confirm_rx = !!(v2->flags & QRTR_FLAGS_CONFIRM_RX);
300 cb->src_node = le16_to_cpu(v2->src_node_id);
301 cb->src_port = le16_to_cpu(v2->src_port_id);
302 cb->dst_node = le16_to_cpu(v2->dst_node_id);
303 cb->dst_port = le16_to_cpu(v2->dst_port_id);
305 if (cb->src_port == (u16)QRTR_PORT_CTRL)
306 cb->src_port = QRTR_PORT_CTRL;
307 if (cb->dst_port == (u16)QRTR_PORT_CTRL)
308 cb->dst_port = QRTR_PORT_CTRL;
310 size = le32_to_cpu(v2->size);
313 pr_err("qrtr: Invalid version %d\n", ver);
317 if (!size || len != ALIGN(size, 4) + hdrlen)
320 if (cb->dst_port != QRTR_PORT_CTRL && cb->type != QRTR_TYPE_DATA)
323 skb_put_data(skb, data + hdrlen, size);
325 skb_queue_tail(&node->rx_queue, skb);
326 schedule_work(&node->work);
335 EXPORT_SYMBOL_GPL(qrtr_endpoint_post);
338 * qrtr_alloc_ctrl_packet() - allocate control packet skb
339 * @pkt: reference to qrtr_ctrl_pkt pointer
341 * Returns newly allocated sk_buff, or NULL on failure
343 * This function allocates a sk_buff large enough to carry a qrtr_ctrl_pkt and
344 * on success returns a reference to the control packet in @pkt.
346 static struct sk_buff *qrtr_alloc_ctrl_packet(struct qrtr_ctrl_pkt **pkt)
348 const int pkt_len = sizeof(struct qrtr_ctrl_pkt);
351 skb = alloc_skb(QRTR_HDR_MAX_SIZE + pkt_len, GFP_KERNEL);
355 skb_reserve(skb, QRTR_HDR_MAX_SIZE);
356 *pkt = skb_put_zero(skb, pkt_len);
361 static struct qrtr_sock *qrtr_port_lookup(int port);
362 static void qrtr_port_put(struct qrtr_sock *ipc);
364 /* Handle and route a received packet.
366 * This will auto-reply with resume-tx packet as necessary.
368 static void qrtr_node_rx_work(struct work_struct *work)
370 struct qrtr_node *node = container_of(work, struct qrtr_node, work);
371 struct qrtr_ctrl_pkt *pkt;
372 struct sockaddr_qrtr dst;
373 struct sockaddr_qrtr src;
376 while ((skb = skb_dequeue(&node->rx_queue)) != NULL) {
377 struct qrtr_sock *ipc;
381 cb = (struct qrtr_cb *)skb->cb;
382 src.sq_node = cb->src_node;
383 src.sq_port = cb->src_port;
384 dst.sq_node = cb->dst_node;
385 dst.sq_port = cb->dst_port;
386 confirm = !!cb->confirm_rx;
388 qrtr_node_assign(node, cb->src_node);
390 ipc = qrtr_port_lookup(cb->dst_port);
394 if (sock_queue_rcv_skb(&ipc->sk, skb))
401 skb = qrtr_alloc_ctrl_packet(&pkt);
405 pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX);
406 pkt->client.node = cpu_to_le32(dst.sq_node);
407 pkt->client.port = cpu_to_le32(dst.sq_port);
409 if (qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX,
417 * qrtr_endpoint_register() - register a new endpoint
418 * @ep: endpoint to register
419 * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment
420 * Return: 0 on success; negative error code on failure
422 * The specified endpoint must have the xmit function pointer set on call.
424 int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid)
426 struct qrtr_node *node;
428 if (!ep || !ep->xmit)
431 node = kzalloc(sizeof(*node), GFP_KERNEL);
435 INIT_WORK(&node->work, qrtr_node_rx_work);
436 kref_init(&node->ref);
437 mutex_init(&node->ep_lock);
438 skb_queue_head_init(&node->rx_queue);
439 node->nid = QRTR_EP_NID_AUTO;
442 qrtr_node_assign(node, nid);
444 mutex_lock(&qrtr_node_lock);
445 list_add(&node->item, &qrtr_all_nodes);
446 mutex_unlock(&qrtr_node_lock);
451 EXPORT_SYMBOL_GPL(qrtr_endpoint_register);
454 * qrtr_endpoint_unregister - unregister endpoint
455 * @ep: endpoint to unregister
457 void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)
459 struct qrtr_node *node = ep->node;
460 struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL};
461 struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL};
462 struct qrtr_ctrl_pkt *pkt;
465 mutex_lock(&node->ep_lock);
467 mutex_unlock(&node->ep_lock);
469 /* Notify the local controller about the event */
470 skb = qrtr_alloc_ctrl_packet(&pkt);
472 pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE);
473 qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst);
476 qrtr_node_release(node);
479 EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister);
481 /* Lookup socket by port.
483 * Callers must release with qrtr_port_put()
485 static struct qrtr_sock *qrtr_port_lookup(int port)
487 struct qrtr_sock *ipc;
489 if (port == QRTR_PORT_CTRL)
492 mutex_lock(&qrtr_port_lock);
493 ipc = idr_find(&qrtr_ports, port);
496 mutex_unlock(&qrtr_port_lock);
501 /* Release acquired socket. */
502 static void qrtr_port_put(struct qrtr_sock *ipc)
507 /* Remove port assignment. */
508 static void qrtr_port_remove(struct qrtr_sock *ipc)
510 struct qrtr_ctrl_pkt *pkt;
512 int port = ipc->us.sq_port;
513 struct sockaddr_qrtr to;
515 to.sq_family = AF_QIPCRTR;
516 to.sq_node = QRTR_NODE_BCAST;
517 to.sq_port = QRTR_PORT_CTRL;
519 skb = qrtr_alloc_ctrl_packet(&pkt);
521 pkt->cmd = cpu_to_le32(QRTR_TYPE_DEL_CLIENT);
522 pkt->client.node = cpu_to_le32(ipc->us.sq_node);
523 pkt->client.port = cpu_to_le32(ipc->us.sq_port);
525 skb_set_owner_w(skb, &ipc->sk);
526 qrtr_bcast_enqueue(NULL, skb, QRTR_TYPE_DEL_CLIENT, &ipc->us,
530 if (port == QRTR_PORT_CTRL)
533 __sock_put(&ipc->sk);
535 mutex_lock(&qrtr_port_lock);
536 idr_remove(&qrtr_ports, port);
537 mutex_unlock(&qrtr_port_lock);
540 /* Assign port number to socket.
542 * Specify port in the integer pointed to by port, and it will be adjusted
543 * on return as necesssary.
546 * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET]
547 * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN
548 * >QRTR_MIN_EPH_SOCKET: Specified; available to all
550 static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
555 mutex_lock(&qrtr_port_lock);
557 min_port = QRTR_MIN_EPH_SOCKET;
558 rc = idr_alloc_u32(&qrtr_ports, ipc, &min_port, QRTR_MAX_EPH_SOCKET, GFP_ATOMIC);
561 } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
563 } else if (*port == QRTR_PORT_CTRL) {
565 rc = idr_alloc_u32(&qrtr_ports, ipc, &min_port, 0, GFP_ATOMIC);
568 rc = idr_alloc_u32(&qrtr_ports, ipc, &min_port, *port, GFP_ATOMIC);
572 mutex_unlock(&qrtr_port_lock);
584 /* Reset all non-control ports */
585 static void qrtr_reset_ports(void)
587 struct qrtr_sock *ipc;
590 mutex_lock(&qrtr_port_lock);
591 idr_for_each_entry(&qrtr_ports, ipc, id) {
592 /* Don't reset control port */
597 ipc->sk.sk_err = ENETRESET;
598 ipc->sk.sk_error_report(&ipc->sk);
601 mutex_unlock(&qrtr_port_lock);
604 /* Bind socket to address.
606 * Socket should be locked upon call.
608 static int __qrtr_bind(struct socket *sock,
609 const struct sockaddr_qrtr *addr, int zapped)
611 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
612 struct sock *sk = sock->sk;
617 if (!zapped && addr->sq_port == ipc->us.sq_port)
620 port = addr->sq_port;
621 rc = qrtr_port_assign(ipc, &port);
625 /* unbind previous, if any */
627 qrtr_port_remove(ipc);
628 ipc->us.sq_port = port;
630 sock_reset_flag(sk, SOCK_ZAPPED);
632 /* Notify all open ports about the new controller */
633 if (port == QRTR_PORT_CTRL)
639 /* Auto bind to an ephemeral port. */
640 static int qrtr_autobind(struct socket *sock)
642 struct sock *sk = sock->sk;
643 struct sockaddr_qrtr addr;
645 if (!sock_flag(sk, SOCK_ZAPPED))
648 addr.sq_family = AF_QIPCRTR;
649 addr.sq_node = qrtr_local_nid;
652 return __qrtr_bind(sock, &addr, 1);
655 /* Bind socket to specified sockaddr. */
656 static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len)
658 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
659 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
660 struct sock *sk = sock->sk;
663 if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
666 if (addr->sq_node != ipc->us.sq_node)
670 rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED));
676 /* Queue packet to local peer socket. */
677 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb,
678 int type, struct sockaddr_qrtr *from,
679 struct sockaddr_qrtr *to)
681 struct qrtr_sock *ipc;
684 ipc = qrtr_port_lookup(to->sq_port);
685 if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */
690 cb = (struct qrtr_cb *)skb->cb;
691 cb->src_node = from->sq_node;
692 cb->src_port = from->sq_port;
694 if (sock_queue_rcv_skb(&ipc->sk, skb)) {
705 /* Queue packet for broadcast. */
706 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb,
707 int type, struct sockaddr_qrtr *from,
708 struct sockaddr_qrtr *to)
710 struct sk_buff *skbn;
712 mutex_lock(&qrtr_node_lock);
713 list_for_each_entry(node, &qrtr_all_nodes, item) {
714 skbn = skb_clone(skb, GFP_KERNEL);
717 skb_set_owner_w(skbn, skb->sk);
718 qrtr_node_enqueue(node, skbn, type, from, to);
720 mutex_unlock(&qrtr_node_lock);
722 qrtr_local_enqueue(NULL, skb, type, from, to);
727 static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
729 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
730 int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *, int,
731 struct sockaddr_qrtr *, struct sockaddr_qrtr *);
732 __le32 qrtr_type = cpu_to_le32(QRTR_TYPE_DATA);
733 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
734 struct sock *sk = sock->sk;
735 struct qrtr_node *node;
741 if (msg->msg_flags & ~(MSG_DONTWAIT))
750 if (msg->msg_namelen < sizeof(*addr)) {
755 if (addr->sq_family != AF_QIPCRTR) {
760 rc = qrtr_autobind(sock);
765 } else if (sk->sk_state == TCP_ESTABLISHED) {
773 if (addr->sq_node == QRTR_NODE_BCAST) {
774 if (addr->sq_port != QRTR_PORT_CTRL &&
775 qrtr_local_nid != QRTR_NODE_BCAST) {
779 enqueue_fn = qrtr_bcast_enqueue;
780 } else if (addr->sq_node == ipc->us.sq_node) {
781 enqueue_fn = qrtr_local_enqueue;
783 node = qrtr_node_lookup(addr->sq_node);
788 enqueue_fn = qrtr_node_enqueue;
791 plen = (len + 3) & ~3;
792 skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE,
793 msg->msg_flags & MSG_DONTWAIT, &rc);
799 skb_reserve(skb, QRTR_HDR_MAX_SIZE);
801 rc = memcpy_from_msg(skb_put(skb, len), msg, len);
807 if (ipc->us.sq_port == QRTR_PORT_CTRL) {
814 /* control messages already require the type as 'command' */
815 skb_copy_bits(skb, 0, &qrtr_type, 4);
818 type = le32_to_cpu(qrtr_type);
819 rc = enqueue_fn(node, skb, type, &ipc->us, addr);
824 qrtr_node_release(node);
830 static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg,
831 size_t size, int flags)
833 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
834 struct sock *sk = sock->sk;
841 if (sock_flag(sk, SOCK_ZAPPED)) {
843 return -EADDRNOTAVAIL;
846 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
847 flags & MSG_DONTWAIT, &rc);
856 msg->msg_flags |= MSG_TRUNC;
859 rc = skb_copy_datagram_msg(skb, 0, msg, copied);
865 /* There is an anonymous 2-byte hole after sq_family,
866 * make sure to clear it.
868 memset(addr, 0, sizeof(*addr));
870 cb = (struct qrtr_cb *)skb->cb;
871 addr->sq_family = AF_QIPCRTR;
872 addr->sq_node = cb->src_node;
873 addr->sq_port = cb->src_port;
874 msg->msg_namelen = sizeof(*addr);
878 skb_free_datagram(sk, skb);
884 static int qrtr_connect(struct socket *sock, struct sockaddr *saddr,
887 DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
888 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
889 struct sock *sk = sock->sk;
892 if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
897 sk->sk_state = TCP_CLOSE;
898 sock->state = SS_UNCONNECTED;
900 rc = qrtr_autobind(sock);
907 sock->state = SS_CONNECTED;
908 sk->sk_state = TCP_ESTABLISHED;
915 static int qrtr_getname(struct socket *sock, struct sockaddr *saddr,
918 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
919 struct sockaddr_qrtr qaddr;
920 struct sock *sk = sock->sk;
924 if (sk->sk_state != TCP_ESTABLISHED) {
935 qaddr.sq_family = AF_QIPCRTR;
937 memcpy(saddr, &qaddr, sizeof(qaddr));
939 return sizeof(qaddr);
942 static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
944 void __user *argp = (void __user *)arg;
945 struct qrtr_sock *ipc = qrtr_sk(sock->sk);
946 struct sock *sk = sock->sk;
947 struct sockaddr_qrtr *sq;
957 len = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
960 rc = put_user(len, (int __user *)argp);
963 skb = skb_peek(&sk->sk_receive_queue);
966 rc = put_user(len, (int __user *)argp);
969 if (copy_from_user(&ifr, argp, sizeof(ifr))) {
974 sq = (struct sockaddr_qrtr *)&ifr.ifr_addr;
976 if (copy_to_user(argp, &ifr, sizeof(ifr))) {
1002 static int qrtr_release(struct socket *sock)
1004 struct sock *sk = sock->sk;
1005 struct qrtr_sock *ipc;
1013 sk->sk_shutdown = SHUTDOWN_MASK;
1014 if (!sock_flag(sk, SOCK_DEAD))
1015 sk->sk_state_change(sk);
1017 sock_set_flag(sk, SOCK_DEAD);
1021 if (!sock_flag(sk, SOCK_ZAPPED))
1022 qrtr_port_remove(ipc);
1024 skb_queue_purge(&sk->sk_receive_queue);
1032 static const struct proto_ops qrtr_proto_ops = {
1033 .owner = THIS_MODULE,
1034 .family = AF_QIPCRTR,
1036 .connect = qrtr_connect,
1037 .socketpair = sock_no_socketpair,
1038 .accept = sock_no_accept,
1039 .listen = sock_no_listen,
1040 .sendmsg = qrtr_sendmsg,
1041 .recvmsg = qrtr_recvmsg,
1042 .getname = qrtr_getname,
1043 .ioctl = qrtr_ioctl,
1044 .gettstamp = sock_gettstamp,
1045 .poll = datagram_poll,
1046 .shutdown = sock_no_shutdown,
1047 .setsockopt = sock_no_setsockopt,
1048 .getsockopt = sock_no_getsockopt,
1049 .release = qrtr_release,
1050 .mmap = sock_no_mmap,
1051 .sendpage = sock_no_sendpage,
1054 static struct proto qrtr_proto = {
1056 .owner = THIS_MODULE,
1057 .obj_size = sizeof(struct qrtr_sock),
1060 static int qrtr_create(struct net *net, struct socket *sock,
1061 int protocol, int kern)
1063 struct qrtr_sock *ipc;
1066 if (sock->type != SOCK_DGRAM)
1069 sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern);
1073 sock_set_flag(sk, SOCK_ZAPPED);
1075 sock_init_data(sock, sk);
1076 sock->ops = &qrtr_proto_ops;
1079 ipc->us.sq_family = AF_QIPCRTR;
1080 ipc->us.sq_node = qrtr_local_nid;
1081 ipc->us.sq_port = 0;
1086 static const struct nla_policy qrtr_policy[IFA_MAX + 1] = {
1087 [IFA_LOCAL] = { .type = NLA_U32 },
1090 static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1091 struct netlink_ext_ack *extack)
1093 struct nlattr *tb[IFA_MAX + 1];
1094 struct ifaddrmsg *ifm;
1097 if (!netlink_capable(skb, CAP_NET_ADMIN))
1100 if (!netlink_capable(skb, CAP_SYS_ADMIN))
1105 rc = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
1106 qrtr_policy, extack);
1110 ifm = nlmsg_data(nlh);
1114 qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]);
1118 static const struct net_proto_family qrtr_family = {
1119 .owner = THIS_MODULE,
1120 .family = AF_QIPCRTR,
1121 .create = qrtr_create,
1124 static int __init qrtr_proto_init(void)
1128 rc = proto_register(&qrtr_proto, 1);
1132 rc = sock_register(&qrtr_family);
1134 proto_unregister(&qrtr_proto);
1138 rc = rtnl_register_module(THIS_MODULE, PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, 0);
1140 sock_unregister(qrtr_family.family);
1141 proto_unregister(&qrtr_proto);
1146 postcore_initcall(qrtr_proto_init);
1148 static void __exit qrtr_proto_fini(void)
1150 rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR);
1151 sock_unregister(qrtr_family.family);
1152 proto_unregister(&qrtr_proto);
1154 module_exit(qrtr_proto_fini);
1156 MODULE_DESCRIPTION("Qualcomm IPC-router driver");
1157 MODULE_LICENSE("GPL v2");
1158 MODULE_ALIAS_NETPROTO(PF_QIPCRTR);