xref: /openbmc/linux/net/qrtr/af_qrtr.c (revision 32118bdc9471f6d28dbf3d55b2bf0f912be0c62b)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2015, Sony Mobile Communications Inc.
4  * Copyright (c) 2013, The Linux Foundation. All rights reserved.
5  */
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/spinlock.h>
11 #include <linux/wait.h>
12 
13 #include <net/sock.h>
14 
15 #include "qrtr.h"
16 
17 #define QRTR_PROTO_VER_1 1
18 #define QRTR_PROTO_VER_2 3
19 
20 /* auto-bind range */
21 #define QRTR_MIN_EPH_SOCKET 0x4000
22 #define QRTR_MAX_EPH_SOCKET 0x7fff
23 #define QRTR_EPH_PORT_RANGE \
24 		XA_LIMIT(QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET)
25 
26 /**
27  * struct qrtr_hdr_v1 - (I|R)PCrouter packet header version 1
28  * @version: protocol version
29  * @type: packet type; one of QRTR_TYPE_*
30  * @src_node_id: source node
31  * @src_port_id: source port
32  * @confirm_rx: boolean; whether a resume-tx packet should be send in reply
33  * @size: length of packet, excluding this header
34  * @dst_node_id: destination node
35  * @dst_port_id: destination port
36  */
37 struct qrtr_hdr_v1 {
38 	__le32 version;
39 	__le32 type;
40 	__le32 src_node_id;
41 	__le32 src_port_id;
42 	__le32 confirm_rx;
43 	__le32 size;
44 	__le32 dst_node_id;
45 	__le32 dst_port_id;
46 } __packed;
47 
48 /**
49  * struct qrtr_hdr_v2 - (I|R)PCrouter packet header later versions
50  * @version: protocol version
51  * @type: packet type; one of QRTR_TYPE_*
52  * @flags: bitmask of QRTR_FLAGS_*
53  * @optlen: length of optional header data
54  * @size: length of packet, excluding this header and optlen
55  * @src_node_id: source node
56  * @src_port_id: source port
57  * @dst_node_id: destination node
58  * @dst_port_id: destination port
59  */
60 struct qrtr_hdr_v2 {
61 	u8 version;
62 	u8 type;
63 	u8 flags;
64 	u8 optlen;
65 	__le32 size;
66 	__le16 src_node_id;
67 	__le16 src_port_id;
68 	__le16 dst_node_id;
69 	__le16 dst_port_id;
70 };
71 
72 #define QRTR_FLAGS_CONFIRM_RX	BIT(0)
73 
74 struct qrtr_cb {
75 	u32 src_node;
76 	u32 src_port;
77 	u32 dst_node;
78 	u32 dst_port;
79 
80 	u8 type;
81 	u8 confirm_rx;
82 };
83 
84 #define QRTR_HDR_MAX_SIZE max_t(size_t, sizeof(struct qrtr_hdr_v1), \
85 					sizeof(struct qrtr_hdr_v2))
86 
87 struct qrtr_sock {
88 	/* WARNING: sk must be the first member */
89 	struct sock sk;
90 	struct sockaddr_qrtr us;
91 	struct sockaddr_qrtr peer;
92 };
93 
94 static inline struct qrtr_sock *qrtr_sk(struct sock *sk)
95 {
96 	BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0);
97 	return container_of(sk, struct qrtr_sock, sk);
98 }
99 
100 static unsigned int qrtr_local_nid = 1;
101 
102 /* for node ids */
103 static RADIX_TREE(qrtr_nodes, GFP_ATOMIC);
104 static DEFINE_SPINLOCK(qrtr_nodes_lock);
105 /* broadcast list */
106 static LIST_HEAD(qrtr_all_nodes);
107 /* lock for qrtr_all_nodes and node reference */
108 static DEFINE_MUTEX(qrtr_node_lock);
109 
110 /* local port allocation management */
111 static DEFINE_XARRAY_ALLOC(qrtr_ports);
112 
113 /**
114  * struct qrtr_node - endpoint node
115  * @ep_lock: lock for endpoint management and callbacks
116  * @ep: endpoint
117  * @ref: reference count for node
118  * @nid: node id
119  * @qrtr_tx_flow: tree of qrtr_tx_flow, keyed by node << 32 | port
120  * @qrtr_tx_lock: lock for qrtr_tx_flow inserts
121  * @rx_queue: receive queue
122  * @item: list item for broadcast list
123  */
124 struct qrtr_node {
125 	struct mutex ep_lock;
126 	struct qrtr_endpoint *ep;
127 	struct kref ref;
128 	unsigned int nid;
129 
130 	struct radix_tree_root qrtr_tx_flow;
131 	struct mutex qrtr_tx_lock; /* for qrtr_tx_flow */
132 
133 	struct sk_buff_head rx_queue;
134 	struct list_head item;
135 };
136 
137 /**
138  * struct qrtr_tx_flow - tx flow control
139  * @resume_tx: waiters for a resume tx from the remote
140  * @pending: number of waiting senders
141  * @tx_failed: indicates that a message with confirm_rx flag was lost
142  */
143 struct qrtr_tx_flow {
144 	struct wait_queue_head resume_tx;
145 	int pending;
146 	int tx_failed;
147 };
148 
149 #define QRTR_TX_FLOW_HIGH	10
150 #define QRTR_TX_FLOW_LOW	5
151 
152 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb,
153 			      int type, struct sockaddr_qrtr *from,
154 			      struct sockaddr_qrtr *to);
155 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb,
156 			      int type, struct sockaddr_qrtr *from,
157 			      struct sockaddr_qrtr *to);
158 static struct qrtr_sock *qrtr_port_lookup(int port);
159 static void qrtr_port_put(struct qrtr_sock *ipc);
160 
161 /* Release node resources and free the node.
162  *
163  * Do not call directly, use qrtr_node_release.  To be used with
164  * kref_put_mutex.  As such, the node mutex is expected to be locked on call.
165  */
166 static void __qrtr_node_release(struct kref *kref)
167 {
168 	struct qrtr_node *node = container_of(kref, struct qrtr_node, ref);
169 	struct radix_tree_iter iter;
170 	struct qrtr_tx_flow *flow;
171 	unsigned long flags;
172 	void __rcu **slot;
173 
174 	spin_lock_irqsave(&qrtr_nodes_lock, flags);
175 	/* If the node is a bridge for other nodes, there are possibly
176 	 * multiple entries pointing to our released node, delete them all.
177 	 */
178 	radix_tree_for_each_slot(slot, &qrtr_nodes, &iter, 0) {
179 		if (*slot == node)
180 			radix_tree_iter_delete(&qrtr_nodes, &iter, slot);
181 	}
182 	spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
183 
184 	list_del(&node->item);
185 	mutex_unlock(&qrtr_node_lock);
186 
187 	skb_queue_purge(&node->rx_queue);
188 
189 	/* Free tx flow counters */
190 	radix_tree_for_each_slot(slot, &node->qrtr_tx_flow, &iter, 0) {
191 		flow = *slot;
192 		radix_tree_iter_delete(&node->qrtr_tx_flow, &iter, slot);
193 		kfree(flow);
194 	}
195 	kfree(node);
196 }
197 
198 /* Increment reference to node. */
199 static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node)
200 {
201 	if (node)
202 		kref_get(&node->ref);
203 	return node;
204 }
205 
206 /* Decrement reference to node and release as necessary. */
207 static void qrtr_node_release(struct qrtr_node *node)
208 {
209 	if (!node)
210 		return;
211 	kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock);
212 }
213 
214 /**
215  * qrtr_tx_resume() - reset flow control counter
216  * @node:	qrtr_node that the QRTR_TYPE_RESUME_TX packet arrived on
217  * @skb:	resume_tx packet
218  */
219 static void qrtr_tx_resume(struct qrtr_node *node, struct sk_buff *skb)
220 {
221 	struct qrtr_ctrl_pkt *pkt = (struct qrtr_ctrl_pkt *)skb->data;
222 	u64 remote_node = le32_to_cpu(pkt->client.node);
223 	u32 remote_port = le32_to_cpu(pkt->client.port);
224 	struct qrtr_tx_flow *flow;
225 	unsigned long key;
226 
227 	key = remote_node << 32 | remote_port;
228 
229 	rcu_read_lock();
230 	flow = radix_tree_lookup(&node->qrtr_tx_flow, key);
231 	rcu_read_unlock();
232 	if (flow) {
233 		spin_lock(&flow->resume_tx.lock);
234 		flow->pending = 0;
235 		spin_unlock(&flow->resume_tx.lock);
236 		wake_up_interruptible_all(&flow->resume_tx);
237 	}
238 
239 	consume_skb(skb);
240 }
241 
242 /**
243  * qrtr_tx_wait() - flow control for outgoing packets
244  * @node:	qrtr_node that the packet is to be send to
245  * @dest_node:	node id of the destination
246  * @dest_port:	port number of the destination
247  * @type:	type of message
248  *
249  * The flow control scheme is based around the low and high "watermarks". When
250  * the low watermark is passed the confirm_rx flag is set on the outgoing
251  * message, which will trigger the remote to send a control message of the type
252  * QRTR_TYPE_RESUME_TX to reset the counter. If the high watermark is hit
253  * further transmision should be paused.
254  *
255  * Return: 1 if confirm_rx should be set, 0 otherwise or errno failure
256  */
257 static int qrtr_tx_wait(struct qrtr_node *node, int dest_node, int dest_port,
258 			int type)
259 {
260 	unsigned long key = (u64)dest_node << 32 | dest_port;
261 	struct qrtr_tx_flow *flow;
262 	int confirm_rx = 0;
263 	int ret;
264 
265 	/* Never set confirm_rx on non-data packets */
266 	if (type != QRTR_TYPE_DATA)
267 		return 0;
268 
269 	mutex_lock(&node->qrtr_tx_lock);
270 	flow = radix_tree_lookup(&node->qrtr_tx_flow, key);
271 	if (!flow) {
272 		flow = kzalloc(sizeof(*flow), GFP_KERNEL);
273 		if (flow) {
274 			init_waitqueue_head(&flow->resume_tx);
275 			if (radix_tree_insert(&node->qrtr_tx_flow, key, flow)) {
276 				kfree(flow);
277 				flow = NULL;
278 			}
279 		}
280 	}
281 	mutex_unlock(&node->qrtr_tx_lock);
282 
283 	/* Set confirm_rx if we where unable to find and allocate a flow */
284 	if (!flow)
285 		return 1;
286 
287 	spin_lock_irq(&flow->resume_tx.lock);
288 	ret = wait_event_interruptible_locked_irq(flow->resume_tx,
289 						  flow->pending < QRTR_TX_FLOW_HIGH ||
290 						  flow->tx_failed ||
291 						  !node->ep);
292 	if (ret < 0) {
293 		confirm_rx = ret;
294 	} else if (!node->ep) {
295 		confirm_rx = -EPIPE;
296 	} else if (flow->tx_failed) {
297 		flow->tx_failed = 0;
298 		confirm_rx = 1;
299 	} else {
300 		flow->pending++;
301 		confirm_rx = flow->pending == QRTR_TX_FLOW_LOW;
302 	}
303 	spin_unlock_irq(&flow->resume_tx.lock);
304 
305 	return confirm_rx;
306 }
307 
308 /**
309  * qrtr_tx_flow_failed() - flag that tx of confirm_rx flagged messages failed
310  * @node:	qrtr_node that the packet is to be send to
311  * @dest_node:	node id of the destination
312  * @dest_port:	port number of the destination
313  *
314  * Signal that the transmission of a message with confirm_rx flag failed. The
315  * flow's "pending" counter will keep incrementing towards QRTR_TX_FLOW_HIGH,
316  * at which point transmission would stall forever waiting for the resume TX
317  * message associated with the dropped confirm_rx message.
318  * Work around this by marking the flow as having a failed transmission and
319  * cause the next transmission attempt to be sent with the confirm_rx.
320  */
321 static void qrtr_tx_flow_failed(struct qrtr_node *node, int dest_node,
322 				int dest_port)
323 {
324 	unsigned long key = (u64)dest_node << 32 | dest_port;
325 	struct qrtr_tx_flow *flow;
326 
327 	rcu_read_lock();
328 	flow = radix_tree_lookup(&node->qrtr_tx_flow, key);
329 	rcu_read_unlock();
330 	if (flow) {
331 		spin_lock_irq(&flow->resume_tx.lock);
332 		flow->tx_failed = 1;
333 		spin_unlock_irq(&flow->resume_tx.lock);
334 	}
335 }
336 
337 /* Pass an outgoing packet socket buffer to the endpoint driver. */
338 static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb,
339 			     int type, struct sockaddr_qrtr *from,
340 			     struct sockaddr_qrtr *to)
341 {
342 	struct qrtr_hdr_v1 *hdr;
343 	size_t len = skb->len;
344 	int rc, confirm_rx;
345 
346 	confirm_rx = qrtr_tx_wait(node, to->sq_node, to->sq_port, type);
347 	if (confirm_rx < 0) {
348 		kfree_skb(skb);
349 		return confirm_rx;
350 	}
351 
352 	hdr = skb_push(skb, sizeof(*hdr));
353 	hdr->version = cpu_to_le32(QRTR_PROTO_VER_1);
354 	hdr->type = cpu_to_le32(type);
355 	hdr->src_node_id = cpu_to_le32(from->sq_node);
356 	hdr->src_port_id = cpu_to_le32(from->sq_port);
357 	if (to->sq_port == QRTR_PORT_CTRL) {
358 		hdr->dst_node_id = cpu_to_le32(node->nid);
359 		hdr->dst_port_id = cpu_to_le32(QRTR_PORT_CTRL);
360 	} else {
361 		hdr->dst_node_id = cpu_to_le32(to->sq_node);
362 		hdr->dst_port_id = cpu_to_le32(to->sq_port);
363 	}
364 
365 	hdr->size = cpu_to_le32(len);
366 	hdr->confirm_rx = !!confirm_rx;
367 
368 	rc = skb_put_padto(skb, ALIGN(len, 4) + sizeof(*hdr));
369 
370 	if (!rc) {
371 		mutex_lock(&node->ep_lock);
372 		rc = -ENODEV;
373 		if (node->ep)
374 			rc = node->ep->xmit(node->ep, skb);
375 		else
376 			kfree_skb(skb);
377 		mutex_unlock(&node->ep_lock);
378 	}
379 	/* Need to ensure that a subsequent message carries the otherwise lost
380 	 * confirm_rx flag if we dropped this one */
381 	if (rc && confirm_rx)
382 		qrtr_tx_flow_failed(node, to->sq_node, to->sq_port);
383 
384 	return rc;
385 }
386 
387 /* Lookup node by id.
388  *
389  * callers must release with qrtr_node_release()
390  */
391 static struct qrtr_node *qrtr_node_lookup(unsigned int nid)
392 {
393 	struct qrtr_node *node;
394 	unsigned long flags;
395 
396 	mutex_lock(&qrtr_node_lock);
397 	spin_lock_irqsave(&qrtr_nodes_lock, flags);
398 	node = radix_tree_lookup(&qrtr_nodes, nid);
399 	node = qrtr_node_acquire(node);
400 	spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
401 	mutex_unlock(&qrtr_node_lock);
402 
403 	return node;
404 }
405 
406 /* Assign node id to node.
407  *
408  * This is mostly useful for automatic node id assignment, based on
409  * the source id in the incoming packet.
410  */
411 static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
412 {
413 	unsigned long flags;
414 
415 	if (nid == QRTR_EP_NID_AUTO)
416 		return;
417 
418 	spin_lock_irqsave(&qrtr_nodes_lock, flags);
419 	radix_tree_insert(&qrtr_nodes, nid, node);
420 	if (node->nid == QRTR_EP_NID_AUTO)
421 		node->nid = nid;
422 	spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
423 }
424 
425 /**
426  * qrtr_endpoint_post() - post incoming data
427  * @ep: endpoint handle
428  * @data: data pointer
429  * @len: size of data in bytes
430  *
431  * Return: 0 on success; negative error code on failure
432  */
433 int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
434 {
435 	struct qrtr_node *node = ep->node;
436 	const struct qrtr_hdr_v1 *v1;
437 	const struct qrtr_hdr_v2 *v2;
438 	struct qrtr_sock *ipc;
439 	struct sk_buff *skb;
440 	struct qrtr_cb *cb;
441 	size_t size;
442 	unsigned int ver;
443 	size_t hdrlen;
444 
445 	if (len == 0 || len & 3)
446 		return -EINVAL;
447 
448 	skb = __netdev_alloc_skb(NULL, len, GFP_ATOMIC | __GFP_NOWARN);
449 	if (!skb)
450 		return -ENOMEM;
451 
452 	cb = (struct qrtr_cb *)skb->cb;
453 
454 	/* Version field in v1 is little endian, so this works for both cases */
455 	ver = *(u8*)data;
456 
457 	switch (ver) {
458 	case QRTR_PROTO_VER_1:
459 		if (len < sizeof(*v1))
460 			goto err;
461 		v1 = data;
462 		hdrlen = sizeof(*v1);
463 
464 		cb->type = le32_to_cpu(v1->type);
465 		cb->src_node = le32_to_cpu(v1->src_node_id);
466 		cb->src_port = le32_to_cpu(v1->src_port_id);
467 		cb->confirm_rx = !!v1->confirm_rx;
468 		cb->dst_node = le32_to_cpu(v1->dst_node_id);
469 		cb->dst_port = le32_to_cpu(v1->dst_port_id);
470 
471 		size = le32_to_cpu(v1->size);
472 		break;
473 	case QRTR_PROTO_VER_2:
474 		if (len < sizeof(*v2))
475 			goto err;
476 		v2 = data;
477 		hdrlen = sizeof(*v2) + v2->optlen;
478 
479 		cb->type = v2->type;
480 		cb->confirm_rx = !!(v2->flags & QRTR_FLAGS_CONFIRM_RX);
481 		cb->src_node = le16_to_cpu(v2->src_node_id);
482 		cb->src_port = le16_to_cpu(v2->src_port_id);
483 		cb->dst_node = le16_to_cpu(v2->dst_node_id);
484 		cb->dst_port = le16_to_cpu(v2->dst_port_id);
485 
486 		if (cb->src_port == (u16)QRTR_PORT_CTRL)
487 			cb->src_port = QRTR_PORT_CTRL;
488 		if (cb->dst_port == (u16)QRTR_PORT_CTRL)
489 			cb->dst_port = QRTR_PORT_CTRL;
490 
491 		size = le32_to_cpu(v2->size);
492 		break;
493 	default:
494 		pr_err("qrtr: Invalid version %d\n", ver);
495 		goto err;
496 	}
497 
498 	if (!size || len != ALIGN(size, 4) + hdrlen)
499 		goto err;
500 
501 	if (cb->dst_port != QRTR_PORT_CTRL && cb->type != QRTR_TYPE_DATA &&
502 	    cb->type != QRTR_TYPE_RESUME_TX)
503 		goto err;
504 
505 	skb_put_data(skb, data + hdrlen, size);
506 
507 	qrtr_node_assign(node, cb->src_node);
508 
509 	if (cb->type == QRTR_TYPE_NEW_SERVER) {
510 		/* Remote node endpoint can bridge other distant nodes */
511 		const struct qrtr_ctrl_pkt *pkt;
512 
513 		if (size < sizeof(*pkt))
514 			goto err;
515 
516 		pkt = data + hdrlen;
517 		qrtr_node_assign(node, le32_to_cpu(pkt->server.node));
518 	}
519 
520 	if (cb->type == QRTR_TYPE_RESUME_TX) {
521 		qrtr_tx_resume(node, skb);
522 	} else {
523 		ipc = qrtr_port_lookup(cb->dst_port);
524 		if (!ipc)
525 			goto err;
526 
527 		if (sock_queue_rcv_skb(&ipc->sk, skb)) {
528 			qrtr_port_put(ipc);
529 			goto err;
530 		}
531 
532 		qrtr_port_put(ipc);
533 	}
534 
535 	return 0;
536 
537 err:
538 	kfree_skb(skb);
539 	return -EINVAL;
540 
541 }
542 EXPORT_SYMBOL_GPL(qrtr_endpoint_post);
543 
544 /**
545  * qrtr_alloc_ctrl_packet() - allocate control packet skb
546  * @pkt: reference to qrtr_ctrl_pkt pointer
547  * @flags: the type of memory to allocate
548  *
549  * Returns newly allocated sk_buff, or NULL on failure
550  *
551  * This function allocates a sk_buff large enough to carry a qrtr_ctrl_pkt and
552  * on success returns a reference to the control packet in @pkt.
553  */
554 static struct sk_buff *qrtr_alloc_ctrl_packet(struct qrtr_ctrl_pkt **pkt,
555 					      gfp_t flags)
556 {
557 	const int pkt_len = sizeof(struct qrtr_ctrl_pkt);
558 	struct sk_buff *skb;
559 
560 	skb = alloc_skb(QRTR_HDR_MAX_SIZE + pkt_len, flags);
561 	if (!skb)
562 		return NULL;
563 
564 	skb_reserve(skb, QRTR_HDR_MAX_SIZE);
565 	*pkt = skb_put_zero(skb, pkt_len);
566 
567 	return skb;
568 }
569 
570 /**
571  * qrtr_endpoint_register() - register a new endpoint
572  * @ep: endpoint to register
573  * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment
574  * Return: 0 on success; negative error code on failure
575  *
576  * The specified endpoint must have the xmit function pointer set on call.
577  */
578 int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid)
579 {
580 	struct qrtr_node *node;
581 
582 	if (!ep || !ep->xmit)
583 		return -EINVAL;
584 
585 	node = kzalloc(sizeof(*node), GFP_KERNEL);
586 	if (!node)
587 		return -ENOMEM;
588 
589 	kref_init(&node->ref);
590 	mutex_init(&node->ep_lock);
591 	skb_queue_head_init(&node->rx_queue);
592 	node->nid = QRTR_EP_NID_AUTO;
593 	node->ep = ep;
594 
595 	INIT_RADIX_TREE(&node->qrtr_tx_flow, GFP_KERNEL);
596 	mutex_init(&node->qrtr_tx_lock);
597 
598 	qrtr_node_assign(node, nid);
599 
600 	mutex_lock(&qrtr_node_lock);
601 	list_add(&node->item, &qrtr_all_nodes);
602 	mutex_unlock(&qrtr_node_lock);
603 	ep->node = node;
604 
605 	return 0;
606 }
607 EXPORT_SYMBOL_GPL(qrtr_endpoint_register);
608 
609 /**
610  * qrtr_endpoint_unregister - unregister endpoint
611  * @ep: endpoint to unregister
612  */
613 void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)
614 {
615 	struct qrtr_node *node = ep->node;
616 	struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL};
617 	struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL};
618 	struct radix_tree_iter iter;
619 	struct qrtr_ctrl_pkt *pkt;
620 	struct qrtr_tx_flow *flow;
621 	struct sk_buff *skb;
622 	unsigned long flags;
623 	void __rcu **slot;
624 
625 	mutex_lock(&node->ep_lock);
626 	node->ep = NULL;
627 	mutex_unlock(&node->ep_lock);
628 
629 	/* Notify the local controller about the event */
630 	spin_lock_irqsave(&qrtr_nodes_lock, flags);
631 	radix_tree_for_each_slot(slot, &qrtr_nodes, &iter, 0) {
632 		if (*slot != node)
633 			continue;
634 		src.sq_node = iter.index;
635 		skb = qrtr_alloc_ctrl_packet(&pkt, GFP_ATOMIC);
636 		if (skb) {
637 			pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE);
638 			qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst);
639 		}
640 	}
641 	spin_unlock_irqrestore(&qrtr_nodes_lock, flags);
642 
643 	/* Wake up any transmitters waiting for resume-tx from the node */
644 	mutex_lock(&node->qrtr_tx_lock);
645 	radix_tree_for_each_slot(slot, &node->qrtr_tx_flow, &iter, 0) {
646 		flow = *slot;
647 		wake_up_interruptible_all(&flow->resume_tx);
648 	}
649 	mutex_unlock(&node->qrtr_tx_lock);
650 
651 	qrtr_node_release(node);
652 	ep->node = NULL;
653 }
654 EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister);
655 
656 /* Lookup socket by port.
657  *
658  * Callers must release with qrtr_port_put()
659  */
660 static struct qrtr_sock *qrtr_port_lookup(int port)
661 {
662 	struct qrtr_sock *ipc;
663 
664 	if (port == QRTR_PORT_CTRL)
665 		port = 0;
666 
667 	rcu_read_lock();
668 	ipc = xa_load(&qrtr_ports, port);
669 	if (ipc)
670 		sock_hold(&ipc->sk);
671 	rcu_read_unlock();
672 
673 	return ipc;
674 }
675 
676 /* Release acquired socket. */
677 static void qrtr_port_put(struct qrtr_sock *ipc)
678 {
679 	sock_put(&ipc->sk);
680 }
681 
682 /* Remove port assignment. */
683 static void qrtr_port_remove(struct qrtr_sock *ipc)
684 {
685 	struct qrtr_ctrl_pkt *pkt;
686 	struct sk_buff *skb;
687 	int port = ipc->us.sq_port;
688 	struct sockaddr_qrtr to;
689 
690 	to.sq_family = AF_QIPCRTR;
691 	to.sq_node = QRTR_NODE_BCAST;
692 	to.sq_port = QRTR_PORT_CTRL;
693 
694 	skb = qrtr_alloc_ctrl_packet(&pkt, GFP_KERNEL);
695 	if (skb) {
696 		pkt->cmd = cpu_to_le32(QRTR_TYPE_DEL_CLIENT);
697 		pkt->client.node = cpu_to_le32(ipc->us.sq_node);
698 		pkt->client.port = cpu_to_le32(ipc->us.sq_port);
699 
700 		skb_set_owner_w(skb, &ipc->sk);
701 		qrtr_bcast_enqueue(NULL, skb, QRTR_TYPE_DEL_CLIENT, &ipc->us,
702 				   &to);
703 	}
704 
705 	if (port == QRTR_PORT_CTRL)
706 		port = 0;
707 
708 	__sock_put(&ipc->sk);
709 
710 	xa_erase(&qrtr_ports, port);
711 
712 	/* Ensure that if qrtr_port_lookup() did enter the RCU read section we
713 	 * wait for it to up increment the refcount */
714 	synchronize_rcu();
715 }
716 
717 /* Assign port number to socket.
718  *
719  * Specify port in the integer pointed to by port, and it will be adjusted
720  * on return as necesssary.
721  *
722  * Port may be:
723  *   0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET]
724  *   <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN
725  *   >QRTR_MIN_EPH_SOCKET: Specified; available to all
726  */
727 static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
728 {
729 	int rc;
730 
731 	if (!*port) {
732 		rc = xa_alloc(&qrtr_ports, port, ipc, QRTR_EPH_PORT_RANGE,
733 				GFP_KERNEL);
734 	} else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
735 		rc = -EACCES;
736 	} else if (*port == QRTR_PORT_CTRL) {
737 		rc = xa_insert(&qrtr_ports, 0, ipc, GFP_KERNEL);
738 	} else {
739 		rc = xa_insert(&qrtr_ports, *port, ipc, GFP_KERNEL);
740 	}
741 
742 	if (rc == -EBUSY)
743 		return -EADDRINUSE;
744 	else if (rc < 0)
745 		return rc;
746 
747 	sock_hold(&ipc->sk);
748 
749 	return 0;
750 }
751 
752 /* Reset all non-control ports */
753 static void qrtr_reset_ports(void)
754 {
755 	struct qrtr_sock *ipc;
756 	unsigned long index;
757 
758 	rcu_read_lock();
759 	xa_for_each_start(&qrtr_ports, index, ipc, 1) {
760 		sock_hold(&ipc->sk);
761 		ipc->sk.sk_err = ENETRESET;
762 		sk_error_report(&ipc->sk);
763 		sock_put(&ipc->sk);
764 	}
765 	rcu_read_unlock();
766 }
767 
768 /* Bind socket to address.
769  *
770  * Socket should be locked upon call.
771  */
772 static int __qrtr_bind(struct socket *sock,
773 		       const struct sockaddr_qrtr *addr, int zapped)
774 {
775 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);
776 	struct sock *sk = sock->sk;
777 	int port;
778 	int rc;
779 
780 	/* rebinding ok */
781 	if (!zapped && addr->sq_port == ipc->us.sq_port)
782 		return 0;
783 
784 	port = addr->sq_port;
785 	rc = qrtr_port_assign(ipc, &port);
786 	if (rc)
787 		return rc;
788 
789 	/* unbind previous, if any */
790 	if (!zapped)
791 		qrtr_port_remove(ipc);
792 	ipc->us.sq_port = port;
793 
794 	sock_reset_flag(sk, SOCK_ZAPPED);
795 
796 	/* Notify all open ports about the new controller */
797 	if (port == QRTR_PORT_CTRL)
798 		qrtr_reset_ports();
799 
800 	return 0;
801 }
802 
803 /* Auto bind to an ephemeral port. */
804 static int qrtr_autobind(struct socket *sock)
805 {
806 	struct sock *sk = sock->sk;
807 	struct sockaddr_qrtr addr;
808 
809 	if (!sock_flag(sk, SOCK_ZAPPED))
810 		return 0;
811 
812 	addr.sq_family = AF_QIPCRTR;
813 	addr.sq_node = qrtr_local_nid;
814 	addr.sq_port = 0;
815 
816 	return __qrtr_bind(sock, &addr, 1);
817 }
818 
819 /* Bind socket to specified sockaddr. */
820 static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len)
821 {
822 	DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
823 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);
824 	struct sock *sk = sock->sk;
825 	int rc;
826 
827 	if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
828 		return -EINVAL;
829 
830 	if (addr->sq_node != ipc->us.sq_node)
831 		return -EINVAL;
832 
833 	lock_sock(sk);
834 	rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED));
835 	release_sock(sk);
836 
837 	return rc;
838 }
839 
840 /* Queue packet to local peer socket. */
841 static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb,
842 			      int type, struct sockaddr_qrtr *from,
843 			      struct sockaddr_qrtr *to)
844 {
845 	struct qrtr_sock *ipc;
846 	struct qrtr_cb *cb;
847 
848 	ipc = qrtr_port_lookup(to->sq_port);
849 	if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */
850 		if (ipc)
851 			qrtr_port_put(ipc);
852 		kfree_skb(skb);
853 		return -ENODEV;
854 	}
855 
856 	cb = (struct qrtr_cb *)skb->cb;
857 	cb->src_node = from->sq_node;
858 	cb->src_port = from->sq_port;
859 
860 	if (sock_queue_rcv_skb(&ipc->sk, skb)) {
861 		qrtr_port_put(ipc);
862 		kfree_skb(skb);
863 		return -ENOSPC;
864 	}
865 
866 	qrtr_port_put(ipc);
867 
868 	return 0;
869 }
870 
871 /* Queue packet for broadcast. */
872 static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb,
873 			      int type, struct sockaddr_qrtr *from,
874 			      struct sockaddr_qrtr *to)
875 {
876 	struct sk_buff *skbn;
877 
878 	mutex_lock(&qrtr_node_lock);
879 	list_for_each_entry(node, &qrtr_all_nodes, item) {
880 		skbn = skb_clone(skb, GFP_KERNEL);
881 		if (!skbn)
882 			break;
883 		skb_set_owner_w(skbn, skb->sk);
884 		qrtr_node_enqueue(node, skbn, type, from, to);
885 	}
886 	mutex_unlock(&qrtr_node_lock);
887 
888 	qrtr_local_enqueue(NULL, skb, type, from, to);
889 
890 	return 0;
891 }
892 
893 static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
894 {
895 	DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
896 	int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *, int,
897 			  struct sockaddr_qrtr *, struct sockaddr_qrtr *);
898 	__le32 qrtr_type = cpu_to_le32(QRTR_TYPE_DATA);
899 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);
900 	struct sock *sk = sock->sk;
901 	struct qrtr_node *node;
902 	struct sk_buff *skb;
903 	size_t plen;
904 	u32 type;
905 	int rc;
906 
907 	if (msg->msg_flags & ~(MSG_DONTWAIT))
908 		return -EINVAL;
909 
910 	if (len > 65535)
911 		return -EMSGSIZE;
912 
913 	lock_sock(sk);
914 
915 	if (addr) {
916 		if (msg->msg_namelen < sizeof(*addr)) {
917 			release_sock(sk);
918 			return -EINVAL;
919 		}
920 
921 		if (addr->sq_family != AF_QIPCRTR) {
922 			release_sock(sk);
923 			return -EINVAL;
924 		}
925 
926 		rc = qrtr_autobind(sock);
927 		if (rc) {
928 			release_sock(sk);
929 			return rc;
930 		}
931 	} else if (sk->sk_state == TCP_ESTABLISHED) {
932 		addr = &ipc->peer;
933 	} else {
934 		release_sock(sk);
935 		return -ENOTCONN;
936 	}
937 
938 	node = NULL;
939 	if (addr->sq_node == QRTR_NODE_BCAST) {
940 		if (addr->sq_port != QRTR_PORT_CTRL &&
941 		    qrtr_local_nid != QRTR_NODE_BCAST) {
942 			release_sock(sk);
943 			return -ENOTCONN;
944 		}
945 		enqueue_fn = qrtr_bcast_enqueue;
946 	} else if (addr->sq_node == ipc->us.sq_node) {
947 		enqueue_fn = qrtr_local_enqueue;
948 	} else {
949 		node = qrtr_node_lookup(addr->sq_node);
950 		if (!node) {
951 			release_sock(sk);
952 			return -ECONNRESET;
953 		}
954 		enqueue_fn = qrtr_node_enqueue;
955 	}
956 
957 	plen = (len + 3) & ~3;
958 	skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE,
959 				  msg->msg_flags & MSG_DONTWAIT, &rc);
960 	if (!skb) {
961 		rc = -ENOMEM;
962 		goto out_node;
963 	}
964 
965 	skb_reserve(skb, QRTR_HDR_MAX_SIZE);
966 
967 	rc = memcpy_from_msg(skb_put(skb, len), msg, len);
968 	if (rc) {
969 		kfree_skb(skb);
970 		goto out_node;
971 	}
972 
973 	if (ipc->us.sq_port == QRTR_PORT_CTRL) {
974 		if (len < 4) {
975 			rc = -EINVAL;
976 			kfree_skb(skb);
977 			goto out_node;
978 		}
979 
980 		/* control messages already require the type as 'command' */
981 		skb_copy_bits(skb, 0, &qrtr_type, 4);
982 	}
983 
984 	type = le32_to_cpu(qrtr_type);
985 	rc = enqueue_fn(node, skb, type, &ipc->us, addr);
986 	if (rc >= 0)
987 		rc = len;
988 
989 out_node:
990 	qrtr_node_release(node);
991 	release_sock(sk);
992 
993 	return rc;
994 }
995 
996 static int qrtr_send_resume_tx(struct qrtr_cb *cb)
997 {
998 	struct sockaddr_qrtr remote = { AF_QIPCRTR, cb->src_node, cb->src_port };
999 	struct sockaddr_qrtr local = { AF_QIPCRTR, cb->dst_node, cb->dst_port };
1000 	struct qrtr_ctrl_pkt *pkt;
1001 	struct qrtr_node *node;
1002 	struct sk_buff *skb;
1003 	int ret;
1004 
1005 	node = qrtr_node_lookup(remote.sq_node);
1006 	if (!node)
1007 		return -EINVAL;
1008 
1009 	skb = qrtr_alloc_ctrl_packet(&pkt, GFP_KERNEL);
1010 	if (!skb)
1011 		return -ENOMEM;
1012 
1013 	pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX);
1014 	pkt->client.node = cpu_to_le32(cb->dst_node);
1015 	pkt->client.port = cpu_to_le32(cb->dst_port);
1016 
1017 	ret = qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, &local, &remote);
1018 
1019 	qrtr_node_release(node);
1020 
1021 	return ret;
1022 }
1023 
1024 static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg,
1025 			size_t size, int flags)
1026 {
1027 	DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name);
1028 	struct sock *sk = sock->sk;
1029 	struct sk_buff *skb;
1030 	struct qrtr_cb *cb;
1031 	int copied, rc;
1032 
1033 	lock_sock(sk);
1034 
1035 	if (sock_flag(sk, SOCK_ZAPPED)) {
1036 		release_sock(sk);
1037 		return -EADDRNOTAVAIL;
1038 	}
1039 
1040 	skb = skb_recv_datagram(sk, flags, &rc);
1041 	if (!skb) {
1042 		release_sock(sk);
1043 		return rc;
1044 	}
1045 	cb = (struct qrtr_cb *)skb->cb;
1046 
1047 	copied = skb->len;
1048 	if (copied > size) {
1049 		copied = size;
1050 		msg->msg_flags |= MSG_TRUNC;
1051 	}
1052 
1053 	rc = skb_copy_datagram_msg(skb, 0, msg, copied);
1054 	if (rc < 0)
1055 		goto out;
1056 	rc = copied;
1057 
1058 	if (addr) {
1059 		/* There is an anonymous 2-byte hole after sq_family,
1060 		 * make sure to clear it.
1061 		 */
1062 		memset(addr, 0, sizeof(*addr));
1063 
1064 		addr->sq_family = AF_QIPCRTR;
1065 		addr->sq_node = cb->src_node;
1066 		addr->sq_port = cb->src_port;
1067 		msg->msg_namelen = sizeof(*addr);
1068 	}
1069 
1070 out:
1071 	if (cb->confirm_rx)
1072 		qrtr_send_resume_tx(cb);
1073 
1074 	skb_free_datagram(sk, skb);
1075 	release_sock(sk);
1076 
1077 	return rc;
1078 }
1079 
1080 static int qrtr_connect(struct socket *sock, struct sockaddr *saddr,
1081 			int len, int flags)
1082 {
1083 	DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
1084 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);
1085 	struct sock *sk = sock->sk;
1086 	int rc;
1087 
1088 	if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR)
1089 		return -EINVAL;
1090 
1091 	lock_sock(sk);
1092 
1093 	sk->sk_state = TCP_CLOSE;
1094 	sock->state = SS_UNCONNECTED;
1095 
1096 	rc = qrtr_autobind(sock);
1097 	if (rc) {
1098 		release_sock(sk);
1099 		return rc;
1100 	}
1101 
1102 	ipc->peer = *addr;
1103 	sock->state = SS_CONNECTED;
1104 	sk->sk_state = TCP_ESTABLISHED;
1105 
1106 	release_sock(sk);
1107 
1108 	return 0;
1109 }
1110 
1111 static int qrtr_getname(struct socket *sock, struct sockaddr *saddr,
1112 			int peer)
1113 {
1114 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);
1115 	struct sockaddr_qrtr qaddr;
1116 	struct sock *sk = sock->sk;
1117 
1118 	lock_sock(sk);
1119 	if (peer) {
1120 		if (sk->sk_state != TCP_ESTABLISHED) {
1121 			release_sock(sk);
1122 			return -ENOTCONN;
1123 		}
1124 
1125 		qaddr = ipc->peer;
1126 	} else {
1127 		qaddr = ipc->us;
1128 	}
1129 	release_sock(sk);
1130 
1131 	qaddr.sq_family = AF_QIPCRTR;
1132 
1133 	memcpy(saddr, &qaddr, sizeof(qaddr));
1134 
1135 	return sizeof(qaddr);
1136 }
1137 
1138 static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1139 {
1140 	void __user *argp = (void __user *)arg;
1141 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);
1142 	struct sock *sk = sock->sk;
1143 	struct sockaddr_qrtr *sq;
1144 	struct sk_buff *skb;
1145 	struct ifreq ifr;
1146 	long len = 0;
1147 	int rc = 0;
1148 
1149 	lock_sock(sk);
1150 
1151 	switch (cmd) {
1152 	case TIOCOUTQ:
1153 		len = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1154 		if (len < 0)
1155 			len = 0;
1156 		rc = put_user(len, (int __user *)argp);
1157 		break;
1158 	case TIOCINQ:
1159 		skb = skb_peek(&sk->sk_receive_queue);
1160 		if (skb)
1161 			len = skb->len;
1162 		rc = put_user(len, (int __user *)argp);
1163 		break;
1164 	case SIOCGIFADDR:
1165 		if (get_user_ifreq(&ifr, NULL, argp)) {
1166 			rc = -EFAULT;
1167 			break;
1168 		}
1169 
1170 		sq = (struct sockaddr_qrtr *)&ifr.ifr_addr;
1171 		*sq = ipc->us;
1172 		if (put_user_ifreq(&ifr, argp)) {
1173 			rc = -EFAULT;
1174 			break;
1175 		}
1176 		break;
1177 	case SIOCADDRT:
1178 	case SIOCDELRT:
1179 	case SIOCSIFADDR:
1180 	case SIOCGIFDSTADDR:
1181 	case SIOCSIFDSTADDR:
1182 	case SIOCGIFBRDADDR:
1183 	case SIOCSIFBRDADDR:
1184 	case SIOCGIFNETMASK:
1185 	case SIOCSIFNETMASK:
1186 		rc = -EINVAL;
1187 		break;
1188 	default:
1189 		rc = -ENOIOCTLCMD;
1190 		break;
1191 	}
1192 
1193 	release_sock(sk);
1194 
1195 	return rc;
1196 }
1197 
1198 static int qrtr_release(struct socket *sock)
1199 {
1200 	struct sock *sk = sock->sk;
1201 	struct qrtr_sock *ipc;
1202 
1203 	if (!sk)
1204 		return 0;
1205 
1206 	lock_sock(sk);
1207 
1208 	ipc = qrtr_sk(sk);
1209 	sk->sk_shutdown = SHUTDOWN_MASK;
1210 	if (!sock_flag(sk, SOCK_DEAD))
1211 		sk->sk_state_change(sk);
1212 
1213 	sock_set_flag(sk, SOCK_DEAD);
1214 	sock_orphan(sk);
1215 	sock->sk = NULL;
1216 
1217 	if (!sock_flag(sk, SOCK_ZAPPED))
1218 		qrtr_port_remove(ipc);
1219 
1220 	skb_queue_purge(&sk->sk_receive_queue);
1221 
1222 	release_sock(sk);
1223 	sock_put(sk);
1224 
1225 	return 0;
1226 }
1227 
1228 static const struct proto_ops qrtr_proto_ops = {
1229 	.owner		= THIS_MODULE,
1230 	.family		= AF_QIPCRTR,
1231 	.bind		= qrtr_bind,
1232 	.connect	= qrtr_connect,
1233 	.socketpair	= sock_no_socketpair,
1234 	.accept		= sock_no_accept,
1235 	.listen		= sock_no_listen,
1236 	.sendmsg	= qrtr_sendmsg,
1237 	.recvmsg	= qrtr_recvmsg,
1238 	.getname	= qrtr_getname,
1239 	.ioctl		= qrtr_ioctl,
1240 	.gettstamp	= sock_gettstamp,
1241 	.poll		= datagram_poll,
1242 	.shutdown	= sock_no_shutdown,
1243 	.release	= qrtr_release,
1244 	.mmap		= sock_no_mmap,
1245 	.sendpage	= sock_no_sendpage,
1246 };
1247 
1248 static struct proto qrtr_proto = {
1249 	.name		= "QIPCRTR",
1250 	.owner		= THIS_MODULE,
1251 	.obj_size	= sizeof(struct qrtr_sock),
1252 };
1253 
1254 static int qrtr_create(struct net *net, struct socket *sock,
1255 		       int protocol, int kern)
1256 {
1257 	struct qrtr_sock *ipc;
1258 	struct sock *sk;
1259 
1260 	if (sock->type != SOCK_DGRAM)
1261 		return -EPROTOTYPE;
1262 
1263 	sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern);
1264 	if (!sk)
1265 		return -ENOMEM;
1266 
1267 	sock_set_flag(sk, SOCK_ZAPPED);
1268 
1269 	sock_init_data(sock, sk);
1270 	sock->ops = &qrtr_proto_ops;
1271 
1272 	ipc = qrtr_sk(sk);
1273 	ipc->us.sq_family = AF_QIPCRTR;
1274 	ipc->us.sq_node = qrtr_local_nid;
1275 	ipc->us.sq_port = 0;
1276 
1277 	return 0;
1278 }
1279 
1280 static const struct net_proto_family qrtr_family = {
1281 	.owner	= THIS_MODULE,
1282 	.family	= AF_QIPCRTR,
1283 	.create	= qrtr_create,
1284 };
1285 
1286 static int __init qrtr_proto_init(void)
1287 {
1288 	int rc;
1289 
1290 	rc = proto_register(&qrtr_proto, 1);
1291 	if (rc)
1292 		return rc;
1293 
1294 	rc = sock_register(&qrtr_family);
1295 	if (rc)
1296 		goto err_proto;
1297 
1298 	rc = qrtr_ns_init();
1299 	if (rc)
1300 		goto err_sock;
1301 
1302 	return 0;
1303 
1304 err_sock:
1305 	sock_unregister(qrtr_family.family);
1306 err_proto:
1307 	proto_unregister(&qrtr_proto);
1308 	return rc;
1309 }
1310 postcore_initcall(qrtr_proto_init);
1311 
1312 static void __exit qrtr_proto_fini(void)
1313 {
1314 	qrtr_ns_remove();
1315 	sock_unregister(qrtr_family.family);
1316 	proto_unregister(&qrtr_proto);
1317 }
1318 module_exit(qrtr_proto_fini);
1319 
1320 MODULE_DESCRIPTION("Qualcomm IPC-router driver");
1321 MODULE_LICENSE("GPL v2");
1322 MODULE_ALIAS_NETPROTO(PF_QIPCRTR);
1323