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bdabad3e CC |
1 | /* |
2 | * Copyright (c) 2015, Sony Mobile Communications Inc. | |
3 | * Copyright (c) 2013, The Linux Foundation. All rights reserved. | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | */ | |
14 | #include <linux/module.h> | |
15 | #include <linux/netlink.h> | |
16 | #include <linux/qrtr.h> | |
17 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
18 | ||
19 | #include <net/sock.h> | |
20 | ||
21 | #include "qrtr.h" | |
22 | ||
194ccc88 BA |
23 | #define QRTR_PROTO_VER_1 1 |
24 | #define QRTR_PROTO_VER_2 3 | |
bdabad3e CC |
25 | |
26 | /* auto-bind range */ | |
27 | #define QRTR_MIN_EPH_SOCKET 0x4000 | |
28 | #define QRTR_MAX_EPH_SOCKET 0x7fff | |
29 | ||
bdabad3e | 30 | /** |
194ccc88 | 31 | * struct qrtr_hdr_v1 - (I|R)PCrouter packet header version 1 |
bdabad3e CC |
32 | * @version: protocol version |
33 | * @type: packet type; one of QRTR_TYPE_* | |
34 | * @src_node_id: source node | |
35 | * @src_port_id: source port | |
36 | * @confirm_rx: boolean; whether a resume-tx packet should be send in reply | |
37 | * @size: length of packet, excluding this header | |
38 | * @dst_node_id: destination node | |
39 | * @dst_port_id: destination port | |
40 | */ | |
194ccc88 | 41 | struct qrtr_hdr_v1 { |
bdabad3e CC |
42 | __le32 version; |
43 | __le32 type; | |
44 | __le32 src_node_id; | |
45 | __le32 src_port_id; | |
46 | __le32 confirm_rx; | |
47 | __le32 size; | |
48 | __le32 dst_node_id; | |
49 | __le32 dst_port_id; | |
50 | } __packed; | |
51 | ||
194ccc88 BA |
52 | /** |
53 | * struct qrtr_hdr_v2 - (I|R)PCrouter packet header later versions | |
54 | * @version: protocol version | |
55 | * @type: packet type; one of QRTR_TYPE_* | |
56 | * @flags: bitmask of QRTR_FLAGS_* | |
57 | * @optlen: length of optional header data | |
58 | * @size: length of packet, excluding this header and optlen | |
59 | * @src_node_id: source node | |
60 | * @src_port_id: source port | |
61 | * @dst_node_id: destination node | |
62 | * @dst_port_id: destination port | |
63 | */ | |
64 | struct qrtr_hdr_v2 { | |
65 | u8 version; | |
66 | u8 type; | |
67 | u8 flags; | |
68 | u8 optlen; | |
69 | __le32 size; | |
70 | __le16 src_node_id; | |
71 | __le16 src_port_id; | |
72 | __le16 dst_node_id; | |
73 | __le16 dst_port_id; | |
74 | }; | |
75 | ||
76 | #define QRTR_FLAGS_CONFIRM_RX BIT(0) | |
77 | ||
f507a9b6 BA |
78 | struct qrtr_cb { |
79 | u32 src_node; | |
80 | u32 src_port; | |
81 | u32 dst_node; | |
82 | u32 dst_port; | |
83 | ||
84 | u8 type; | |
85 | u8 confirm_rx; | |
86 | }; | |
87 | ||
194ccc88 BA |
88 | #define QRTR_HDR_MAX_SIZE max_t(size_t, sizeof(struct qrtr_hdr_v1), \ |
89 | sizeof(struct qrtr_hdr_v2)) | |
bdabad3e CC |
90 | |
91 | struct qrtr_sock { | |
92 | /* WARNING: sk must be the first member */ | |
93 | struct sock sk; | |
94 | struct sockaddr_qrtr us; | |
95 | struct sockaddr_qrtr peer; | |
96 | }; | |
97 | ||
98 | static inline struct qrtr_sock *qrtr_sk(struct sock *sk) | |
99 | { | |
100 | BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0); | |
101 | return container_of(sk, struct qrtr_sock, sk); | |
102 | } | |
103 | ||
104 | static unsigned int qrtr_local_nid = -1; | |
105 | ||
106 | /* for node ids */ | |
107 | static RADIX_TREE(qrtr_nodes, GFP_KERNEL); | |
108 | /* broadcast list */ | |
109 | static LIST_HEAD(qrtr_all_nodes); | |
110 | /* lock for qrtr_nodes, qrtr_all_nodes and node reference */ | |
111 | static DEFINE_MUTEX(qrtr_node_lock); | |
112 | ||
113 | /* local port allocation management */ | |
114 | static DEFINE_IDR(qrtr_ports); | |
115 | static DEFINE_MUTEX(qrtr_port_lock); | |
116 | ||
117 | /** | |
118 | * struct qrtr_node - endpoint node | |
119 | * @ep_lock: lock for endpoint management and callbacks | |
120 | * @ep: endpoint | |
121 | * @ref: reference count for node | |
122 | * @nid: node id | |
123 | * @rx_queue: receive queue | |
124 | * @work: scheduled work struct for recv work | |
125 | * @item: list item for broadcast list | |
126 | */ | |
127 | struct qrtr_node { | |
128 | struct mutex ep_lock; | |
129 | struct qrtr_endpoint *ep; | |
130 | struct kref ref; | |
131 | unsigned int nid; | |
132 | ||
133 | struct sk_buff_head rx_queue; | |
134 | struct work_struct work; | |
135 | struct list_head item; | |
136 | }; | |
137 | ||
e7044482 BA |
138 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
139 | int type, struct sockaddr_qrtr *from, | |
140 | struct sockaddr_qrtr *to); | |
141 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, | |
142 | int type, struct sockaddr_qrtr *from, | |
143 | struct sockaddr_qrtr *to); | |
8acc8ee4 | 144 | |
bdabad3e CC |
145 | /* Release node resources and free the node. |
146 | * | |
147 | * Do not call directly, use qrtr_node_release. To be used with | |
148 | * kref_put_mutex. As such, the node mutex is expected to be locked on call. | |
149 | */ | |
150 | static void __qrtr_node_release(struct kref *kref) | |
151 | { | |
152 | struct qrtr_node *node = container_of(kref, struct qrtr_node, ref); | |
153 | ||
154 | if (node->nid != QRTR_EP_NID_AUTO) | |
155 | radix_tree_delete(&qrtr_nodes, node->nid); | |
156 | ||
157 | list_del(&node->item); | |
158 | mutex_unlock(&qrtr_node_lock); | |
159 | ||
160 | skb_queue_purge(&node->rx_queue); | |
161 | kfree(node); | |
162 | } | |
163 | ||
164 | /* Increment reference to node. */ | |
165 | static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node) | |
166 | { | |
167 | if (node) | |
168 | kref_get(&node->ref); | |
169 | return node; | |
170 | } | |
171 | ||
172 | /* Decrement reference to node and release as necessary. */ | |
173 | static void qrtr_node_release(struct qrtr_node *node) | |
174 | { | |
175 | if (!node) | |
176 | return; | |
177 | kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock); | |
178 | } | |
179 | ||
180 | /* Pass an outgoing packet socket buffer to the endpoint driver. */ | |
e7044482 BA |
181 | static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
182 | int type, struct sockaddr_qrtr *from, | |
183 | struct sockaddr_qrtr *to) | |
bdabad3e | 184 | { |
194ccc88 | 185 | struct qrtr_hdr_v1 *hdr; |
e7044482 | 186 | size_t len = skb->len; |
bdabad3e CC |
187 | int rc = -ENODEV; |
188 | ||
194ccc88 BA |
189 | hdr = skb_push(skb, sizeof(*hdr)); |
190 | hdr->version = cpu_to_le32(QRTR_PROTO_VER_1); | |
e7044482 BA |
191 | hdr->type = cpu_to_le32(type); |
192 | hdr->src_node_id = cpu_to_le32(from->sq_node); | |
193 | hdr->src_port_id = cpu_to_le32(from->sq_port); | |
194 | hdr->dst_node_id = cpu_to_le32(to->sq_node); | |
195 | hdr->dst_port_id = cpu_to_le32(to->sq_port); | |
196 | ||
197 | hdr->size = cpu_to_le32(len); | |
198 | hdr->confirm_rx = 0; | |
199 | ||
200 | skb_put_padto(skb, ALIGN(len, 4)); | |
201 | ||
bdabad3e CC |
202 | mutex_lock(&node->ep_lock); |
203 | if (node->ep) | |
204 | rc = node->ep->xmit(node->ep, skb); | |
205 | else | |
206 | kfree_skb(skb); | |
207 | mutex_unlock(&node->ep_lock); | |
208 | ||
209 | return rc; | |
210 | } | |
211 | ||
212 | /* Lookup node by id. | |
213 | * | |
214 | * callers must release with qrtr_node_release() | |
215 | */ | |
216 | static struct qrtr_node *qrtr_node_lookup(unsigned int nid) | |
217 | { | |
218 | struct qrtr_node *node; | |
219 | ||
220 | mutex_lock(&qrtr_node_lock); | |
221 | node = radix_tree_lookup(&qrtr_nodes, nid); | |
222 | node = qrtr_node_acquire(node); | |
223 | mutex_unlock(&qrtr_node_lock); | |
224 | ||
225 | return node; | |
226 | } | |
227 | ||
228 | /* Assign node id to node. | |
229 | * | |
230 | * This is mostly useful for automatic node id assignment, based on | |
231 | * the source id in the incoming packet. | |
232 | */ | |
233 | static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid) | |
234 | { | |
235 | if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO) | |
236 | return; | |
237 | ||
238 | mutex_lock(&qrtr_node_lock); | |
239 | radix_tree_insert(&qrtr_nodes, nid, node); | |
240 | node->nid = nid; | |
241 | mutex_unlock(&qrtr_node_lock); | |
242 | } | |
243 | ||
244 | /** | |
245 | * qrtr_endpoint_post() - post incoming data | |
246 | * @ep: endpoint handle | |
247 | * @data: data pointer | |
248 | * @len: size of data in bytes | |
249 | * | |
250 | * Return: 0 on success; negative error code on failure | |
251 | */ | |
252 | int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len) | |
253 | { | |
254 | struct qrtr_node *node = ep->node; | |
194ccc88 BA |
255 | const struct qrtr_hdr_v1 *v1; |
256 | const struct qrtr_hdr_v2 *v2; | |
bdabad3e | 257 | struct sk_buff *skb; |
f507a9b6 | 258 | struct qrtr_cb *cb; |
bdabad3e | 259 | unsigned int size; |
bdabad3e | 260 | unsigned int ver; |
194ccc88 | 261 | size_t hdrlen; |
bdabad3e | 262 | |
194ccc88 | 263 | if (len & 3) |
bdabad3e CC |
264 | return -EINVAL; |
265 | ||
266 | skb = netdev_alloc_skb(NULL, len); | |
267 | if (!skb) | |
268 | return -ENOMEM; | |
269 | ||
f507a9b6 | 270 | cb = (struct qrtr_cb *)skb->cb; |
f507a9b6 | 271 | |
194ccc88 BA |
272 | /* Version field in v1 is little endian, so this works for both cases */ |
273 | ver = *(u8*)data; | |
274 | ||
275 | switch (ver) { | |
276 | case QRTR_PROTO_VER_1: | |
277 | v1 = data; | |
278 | hdrlen = sizeof(*v1); | |
279 | ||
280 | cb->type = le32_to_cpu(v1->type); | |
281 | cb->src_node = le32_to_cpu(v1->src_node_id); | |
282 | cb->src_port = le32_to_cpu(v1->src_port_id); | |
283 | cb->confirm_rx = !!v1->confirm_rx; | |
284 | cb->dst_node = le32_to_cpu(v1->dst_node_id); | |
285 | cb->dst_port = le32_to_cpu(v1->dst_port_id); | |
286 | ||
287 | size = le32_to_cpu(v1->size); | |
288 | break; | |
289 | case QRTR_PROTO_VER_2: | |
290 | v2 = data; | |
291 | hdrlen = sizeof(*v2) + v2->optlen; | |
292 | ||
293 | cb->type = v2->type; | |
294 | cb->confirm_rx = !!(v2->flags & QRTR_FLAGS_CONFIRM_RX); | |
295 | cb->src_node = le16_to_cpu(v2->src_node_id); | |
296 | cb->src_port = le16_to_cpu(v2->src_port_id); | |
297 | cb->dst_node = le16_to_cpu(v2->dst_node_id); | |
298 | cb->dst_port = le16_to_cpu(v2->dst_port_id); | |
299 | ||
300 | if (cb->src_port == (u16)QRTR_PORT_CTRL) | |
301 | cb->src_port = QRTR_PORT_CTRL; | |
302 | if (cb->dst_port == (u16)QRTR_PORT_CTRL) | |
303 | cb->dst_port = QRTR_PORT_CTRL; | |
304 | ||
305 | size = le32_to_cpu(v2->size); | |
306 | break; | |
307 | default: | |
308 | pr_err("qrtr: Invalid version %d\n", ver); | |
309 | goto err; | |
310 | } | |
311 | ||
312 | if (len != ALIGN(size, 4) + hdrlen) | |
313 | goto err; | |
314 | ||
315 | if (cb->dst_port != QRTR_PORT_CTRL && cb->type != QRTR_TYPE_DATA) | |
316 | goto err; | |
317 | ||
318 | skb_put_data(skb, data + hdrlen, size); | |
bdabad3e CC |
319 | |
320 | skb_queue_tail(&node->rx_queue, skb); | |
321 | schedule_work(&node->work); | |
322 | ||
323 | return 0; | |
194ccc88 BA |
324 | |
325 | err: | |
326 | kfree_skb(skb); | |
327 | return -EINVAL; | |
328 | ||
bdabad3e CC |
329 | } |
330 | EXPORT_SYMBOL_GPL(qrtr_endpoint_post); | |
331 | ||
1a7959c7 BA |
332 | /** |
333 | * qrtr_alloc_ctrl_packet() - allocate control packet skb | |
334 | * @pkt: reference to qrtr_ctrl_pkt pointer | |
335 | * | |
336 | * Returns newly allocated sk_buff, or NULL on failure | |
337 | * | |
338 | * This function allocates a sk_buff large enough to carry a qrtr_ctrl_pkt and | |
339 | * on success returns a reference to the control packet in @pkt. | |
340 | */ | |
341 | static struct sk_buff *qrtr_alloc_ctrl_packet(struct qrtr_ctrl_pkt **pkt) | |
bdabad3e | 342 | { |
1a7959c7 | 343 | const int pkt_len = sizeof(struct qrtr_ctrl_pkt); |
bdabad3e | 344 | struct sk_buff *skb; |
bdabad3e | 345 | |
194ccc88 | 346 | skb = alloc_skb(QRTR_HDR_MAX_SIZE + pkt_len, GFP_KERNEL); |
bdabad3e CC |
347 | if (!skb) |
348 | return NULL; | |
bdabad3e | 349 | |
194ccc88 | 350 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
1a7959c7 | 351 | *pkt = skb_put_zero(skb, pkt_len); |
1784473b BA |
352 | |
353 | return skb; | |
354 | } | |
355 | ||
bdabad3e CC |
356 | static struct qrtr_sock *qrtr_port_lookup(int port); |
357 | static void qrtr_port_put(struct qrtr_sock *ipc); | |
358 | ||
359 | /* Handle and route a received packet. | |
360 | * | |
361 | * This will auto-reply with resume-tx packet as necessary. | |
362 | */ | |
363 | static void qrtr_node_rx_work(struct work_struct *work) | |
364 | { | |
365 | struct qrtr_node *node = container_of(work, struct qrtr_node, work); | |
1a7959c7 | 366 | struct qrtr_ctrl_pkt *pkt; |
e7044482 BA |
367 | struct sockaddr_qrtr dst; |
368 | struct sockaddr_qrtr src; | |
bdabad3e CC |
369 | struct sk_buff *skb; |
370 | ||
371 | while ((skb = skb_dequeue(&node->rx_queue)) != NULL) { | |
bdabad3e | 372 | struct qrtr_sock *ipc; |
f507a9b6 | 373 | struct qrtr_cb *cb; |
bdabad3e CC |
374 | int confirm; |
375 | ||
f507a9b6 BA |
376 | cb = (struct qrtr_cb *)skb->cb; |
377 | src.sq_node = cb->src_node; | |
378 | src.sq_port = cb->src_port; | |
379 | dst.sq_node = cb->dst_node; | |
380 | dst.sq_port = cb->dst_port; | |
381 | confirm = !!cb->confirm_rx; | |
bdabad3e | 382 | |
f507a9b6 | 383 | qrtr_node_assign(node, cb->src_node); |
e7044482 | 384 | |
f507a9b6 | 385 | ipc = qrtr_port_lookup(cb->dst_port); |
bdabad3e CC |
386 | if (!ipc) { |
387 | kfree_skb(skb); | |
388 | } else { | |
389 | if (sock_queue_rcv_skb(&ipc->sk, skb)) | |
390 | kfree_skb(skb); | |
391 | ||
392 | qrtr_port_put(ipc); | |
393 | } | |
394 | ||
395 | if (confirm) { | |
1a7959c7 | 396 | skb = qrtr_alloc_ctrl_packet(&pkt); |
bdabad3e CC |
397 | if (!skb) |
398 | break; | |
e7044482 | 399 | |
1a7959c7 BA |
400 | pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX); |
401 | pkt->client.node = cpu_to_le32(dst.sq_node); | |
402 | pkt->client.port = cpu_to_le32(dst.sq_port); | |
403 | ||
e7044482 BA |
404 | if (qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, |
405 | &dst, &src)) | |
bdabad3e CC |
406 | break; |
407 | } | |
408 | } | |
409 | } | |
410 | ||
411 | /** | |
412 | * qrtr_endpoint_register() - register a new endpoint | |
413 | * @ep: endpoint to register | |
414 | * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment | |
415 | * Return: 0 on success; negative error code on failure | |
416 | * | |
417 | * The specified endpoint must have the xmit function pointer set on call. | |
418 | */ | |
419 | int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid) | |
420 | { | |
421 | struct qrtr_node *node; | |
422 | ||
423 | if (!ep || !ep->xmit) | |
424 | return -EINVAL; | |
425 | ||
426 | node = kzalloc(sizeof(*node), GFP_KERNEL); | |
427 | if (!node) | |
428 | return -ENOMEM; | |
429 | ||
430 | INIT_WORK(&node->work, qrtr_node_rx_work); | |
431 | kref_init(&node->ref); | |
432 | mutex_init(&node->ep_lock); | |
433 | skb_queue_head_init(&node->rx_queue); | |
434 | node->nid = QRTR_EP_NID_AUTO; | |
435 | node->ep = ep; | |
436 | ||
437 | qrtr_node_assign(node, nid); | |
438 | ||
439 | mutex_lock(&qrtr_node_lock); | |
440 | list_add(&node->item, &qrtr_all_nodes); | |
441 | mutex_unlock(&qrtr_node_lock); | |
442 | ep->node = node; | |
443 | ||
444 | return 0; | |
445 | } | |
446 | EXPORT_SYMBOL_GPL(qrtr_endpoint_register); | |
447 | ||
448 | /** | |
449 | * qrtr_endpoint_unregister - unregister endpoint | |
450 | * @ep: endpoint to unregister | |
451 | */ | |
452 | void qrtr_endpoint_unregister(struct qrtr_endpoint *ep) | |
453 | { | |
454 | struct qrtr_node *node = ep->node; | |
e7044482 BA |
455 | struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL}; |
456 | struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL}; | |
1a7959c7 | 457 | struct qrtr_ctrl_pkt *pkt; |
8acc8ee4 | 458 | struct sk_buff *skb; |
bdabad3e CC |
459 | |
460 | mutex_lock(&node->ep_lock); | |
461 | node->ep = NULL; | |
462 | mutex_unlock(&node->ep_lock); | |
463 | ||
8acc8ee4 | 464 | /* Notify the local controller about the event */ |
1a7959c7 BA |
465 | skb = qrtr_alloc_ctrl_packet(&pkt); |
466 | if (skb) { | |
467 | pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE); | |
e7044482 | 468 | qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst); |
1a7959c7 | 469 | } |
8acc8ee4 | 470 | |
bdabad3e CC |
471 | qrtr_node_release(node); |
472 | ep->node = NULL; | |
473 | } | |
474 | EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister); | |
475 | ||
476 | /* Lookup socket by port. | |
477 | * | |
478 | * Callers must release with qrtr_port_put() | |
479 | */ | |
480 | static struct qrtr_sock *qrtr_port_lookup(int port) | |
481 | { | |
482 | struct qrtr_sock *ipc; | |
483 | ||
484 | if (port == QRTR_PORT_CTRL) | |
485 | port = 0; | |
486 | ||
487 | mutex_lock(&qrtr_port_lock); | |
488 | ipc = idr_find(&qrtr_ports, port); | |
489 | if (ipc) | |
490 | sock_hold(&ipc->sk); | |
491 | mutex_unlock(&qrtr_port_lock); | |
492 | ||
493 | return ipc; | |
494 | } | |
495 | ||
496 | /* Release acquired socket. */ | |
497 | static void qrtr_port_put(struct qrtr_sock *ipc) | |
498 | { | |
499 | sock_put(&ipc->sk); | |
500 | } | |
501 | ||
502 | /* Remove port assignment. */ | |
503 | static void qrtr_port_remove(struct qrtr_sock *ipc) | |
504 | { | |
1a7959c7 | 505 | struct qrtr_ctrl_pkt *pkt; |
1784473b | 506 | struct sk_buff *skb; |
bdabad3e | 507 | int port = ipc->us.sq_port; |
e7044482 BA |
508 | struct sockaddr_qrtr to; |
509 | ||
510 | to.sq_family = AF_QIPCRTR; | |
511 | to.sq_node = QRTR_NODE_BCAST; | |
512 | to.sq_port = QRTR_PORT_CTRL; | |
bdabad3e | 513 | |
1a7959c7 | 514 | skb = qrtr_alloc_ctrl_packet(&pkt); |
1784473b | 515 | if (skb) { |
1a7959c7 BA |
516 | pkt->cmd = cpu_to_le32(QRTR_TYPE_DEL_CLIENT); |
517 | pkt->client.node = cpu_to_le32(ipc->us.sq_node); | |
518 | pkt->client.port = cpu_to_le32(ipc->us.sq_port); | |
519 | ||
1784473b | 520 | skb_set_owner_w(skb, &ipc->sk); |
e7044482 BA |
521 | qrtr_bcast_enqueue(NULL, skb, QRTR_TYPE_DEL_CLIENT, &ipc->us, |
522 | &to); | |
1784473b BA |
523 | } |
524 | ||
bdabad3e CC |
525 | if (port == QRTR_PORT_CTRL) |
526 | port = 0; | |
527 | ||
528 | __sock_put(&ipc->sk); | |
529 | ||
530 | mutex_lock(&qrtr_port_lock); | |
531 | idr_remove(&qrtr_ports, port); | |
532 | mutex_unlock(&qrtr_port_lock); | |
533 | } | |
534 | ||
535 | /* Assign port number to socket. | |
536 | * | |
537 | * Specify port in the integer pointed to by port, and it will be adjusted | |
538 | * on return as necesssary. | |
539 | * | |
540 | * Port may be: | |
541 | * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET] | |
542 | * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN | |
543 | * >QRTR_MIN_EPH_SOCKET: Specified; available to all | |
544 | */ | |
545 | static int qrtr_port_assign(struct qrtr_sock *ipc, int *port) | |
546 | { | |
547 | int rc; | |
548 | ||
549 | mutex_lock(&qrtr_port_lock); | |
550 | if (!*port) { | |
551 | rc = idr_alloc(&qrtr_ports, ipc, | |
552 | QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1, | |
553 | GFP_ATOMIC); | |
554 | if (rc >= 0) | |
555 | *port = rc; | |
556 | } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) { | |
557 | rc = -EACCES; | |
558 | } else if (*port == QRTR_PORT_CTRL) { | |
559 | rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC); | |
560 | } else { | |
561 | rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC); | |
562 | if (rc >= 0) | |
563 | *port = rc; | |
564 | } | |
565 | mutex_unlock(&qrtr_port_lock); | |
566 | ||
567 | if (rc == -ENOSPC) | |
568 | return -EADDRINUSE; | |
569 | else if (rc < 0) | |
570 | return rc; | |
571 | ||
572 | sock_hold(&ipc->sk); | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
b24844b1 BA |
577 | /* Reset all non-control ports */ |
578 | static void qrtr_reset_ports(void) | |
579 | { | |
580 | struct qrtr_sock *ipc; | |
581 | int id; | |
582 | ||
583 | mutex_lock(&qrtr_port_lock); | |
584 | idr_for_each_entry(&qrtr_ports, ipc, id) { | |
585 | /* Don't reset control port */ | |
586 | if (id == 0) | |
587 | continue; | |
588 | ||
589 | sock_hold(&ipc->sk); | |
590 | ipc->sk.sk_err = ENETRESET; | |
ae85bfa8 | 591 | ipc->sk.sk_error_report(&ipc->sk); |
b24844b1 BA |
592 | sock_put(&ipc->sk); |
593 | } | |
594 | mutex_unlock(&qrtr_port_lock); | |
595 | } | |
596 | ||
bdabad3e CC |
597 | /* Bind socket to address. |
598 | * | |
599 | * Socket should be locked upon call. | |
600 | */ | |
601 | static int __qrtr_bind(struct socket *sock, | |
602 | const struct sockaddr_qrtr *addr, int zapped) | |
603 | { | |
604 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
605 | struct sock *sk = sock->sk; | |
606 | int port; | |
607 | int rc; | |
608 | ||
609 | /* rebinding ok */ | |
610 | if (!zapped && addr->sq_port == ipc->us.sq_port) | |
611 | return 0; | |
612 | ||
613 | port = addr->sq_port; | |
614 | rc = qrtr_port_assign(ipc, &port); | |
615 | if (rc) | |
616 | return rc; | |
617 | ||
618 | /* unbind previous, if any */ | |
619 | if (!zapped) | |
620 | qrtr_port_remove(ipc); | |
621 | ipc->us.sq_port = port; | |
622 | ||
623 | sock_reset_flag(sk, SOCK_ZAPPED); | |
624 | ||
b24844b1 BA |
625 | /* Notify all open ports about the new controller */ |
626 | if (port == QRTR_PORT_CTRL) | |
627 | qrtr_reset_ports(); | |
628 | ||
bdabad3e CC |
629 | return 0; |
630 | } | |
631 | ||
632 | /* Auto bind to an ephemeral port. */ | |
633 | static int qrtr_autobind(struct socket *sock) | |
634 | { | |
635 | struct sock *sk = sock->sk; | |
636 | struct sockaddr_qrtr addr; | |
637 | ||
638 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
639 | return 0; | |
640 | ||
641 | addr.sq_family = AF_QIPCRTR; | |
642 | addr.sq_node = qrtr_local_nid; | |
643 | addr.sq_port = 0; | |
644 | ||
645 | return __qrtr_bind(sock, &addr, 1); | |
646 | } | |
647 | ||
648 | /* Bind socket to specified sockaddr. */ | |
649 | static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
650 | { | |
651 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
652 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
653 | struct sock *sk = sock->sk; | |
654 | int rc; | |
655 | ||
656 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
657 | return -EINVAL; | |
658 | ||
659 | if (addr->sq_node != ipc->us.sq_node) | |
660 | return -EINVAL; | |
661 | ||
662 | lock_sock(sk); | |
663 | rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED)); | |
664 | release_sock(sk); | |
665 | ||
666 | return rc; | |
667 | } | |
668 | ||
669 | /* Queue packet to local peer socket. */ | |
e7044482 BA |
670 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
671 | int type, struct sockaddr_qrtr *from, | |
672 | struct sockaddr_qrtr *to) | |
bdabad3e | 673 | { |
bdabad3e | 674 | struct qrtr_sock *ipc; |
f507a9b6 | 675 | struct qrtr_cb *cb; |
bdabad3e | 676 | |
e7044482 | 677 | ipc = qrtr_port_lookup(to->sq_port); |
bdabad3e CC |
678 | if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */ |
679 | kfree_skb(skb); | |
680 | return -ENODEV; | |
681 | } | |
682 | ||
f507a9b6 BA |
683 | cb = (struct qrtr_cb *)skb->cb; |
684 | cb->src_node = from->sq_node; | |
685 | cb->src_port = from->sq_port; | |
e7044482 | 686 | |
bdabad3e CC |
687 | if (sock_queue_rcv_skb(&ipc->sk, skb)) { |
688 | qrtr_port_put(ipc); | |
689 | kfree_skb(skb); | |
690 | return -ENOSPC; | |
691 | } | |
692 | ||
693 | qrtr_port_put(ipc); | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | /* Queue packet for broadcast. */ | |
e7044482 BA |
699 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
700 | int type, struct sockaddr_qrtr *from, | |
701 | struct sockaddr_qrtr *to) | |
bdabad3e CC |
702 | { |
703 | struct sk_buff *skbn; | |
704 | ||
705 | mutex_lock(&qrtr_node_lock); | |
706 | list_for_each_entry(node, &qrtr_all_nodes, item) { | |
707 | skbn = skb_clone(skb, GFP_KERNEL); | |
708 | if (!skbn) | |
709 | break; | |
710 | skb_set_owner_w(skbn, skb->sk); | |
e7044482 | 711 | qrtr_node_enqueue(node, skbn, type, from, to); |
bdabad3e CC |
712 | } |
713 | mutex_unlock(&qrtr_node_lock); | |
714 | ||
e7044482 | 715 | qrtr_local_enqueue(node, skb, type, from, to); |
bdabad3e CC |
716 | |
717 | return 0; | |
718 | } | |
719 | ||
720 | static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) | |
721 | { | |
722 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
e7044482 BA |
723 | int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *, int, |
724 | struct sockaddr_qrtr *, struct sockaddr_qrtr *); | |
bdabad3e CC |
725 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); |
726 | struct sock *sk = sock->sk; | |
727 | struct qrtr_node *node; | |
bdabad3e CC |
728 | struct sk_buff *skb; |
729 | size_t plen; | |
e7044482 | 730 | u32 type = QRTR_TYPE_DATA; |
bdabad3e CC |
731 | int rc; |
732 | ||
733 | if (msg->msg_flags & ~(MSG_DONTWAIT)) | |
734 | return -EINVAL; | |
735 | ||
736 | if (len > 65535) | |
737 | return -EMSGSIZE; | |
738 | ||
739 | lock_sock(sk); | |
740 | ||
741 | if (addr) { | |
742 | if (msg->msg_namelen < sizeof(*addr)) { | |
743 | release_sock(sk); | |
744 | return -EINVAL; | |
745 | } | |
746 | ||
747 | if (addr->sq_family != AF_QIPCRTR) { | |
748 | release_sock(sk); | |
749 | return -EINVAL; | |
750 | } | |
751 | ||
752 | rc = qrtr_autobind(sock); | |
753 | if (rc) { | |
754 | release_sock(sk); | |
755 | return rc; | |
756 | } | |
757 | } else if (sk->sk_state == TCP_ESTABLISHED) { | |
758 | addr = &ipc->peer; | |
759 | } else { | |
760 | release_sock(sk); | |
761 | return -ENOTCONN; | |
762 | } | |
763 | ||
764 | node = NULL; | |
765 | if (addr->sq_node == QRTR_NODE_BCAST) { | |
766 | enqueue_fn = qrtr_bcast_enqueue; | |
767 | } else if (addr->sq_node == ipc->us.sq_node) { | |
768 | enqueue_fn = qrtr_local_enqueue; | |
769 | } else { | |
770 | enqueue_fn = qrtr_node_enqueue; | |
771 | node = qrtr_node_lookup(addr->sq_node); | |
772 | if (!node) { | |
773 | release_sock(sk); | |
774 | return -ECONNRESET; | |
775 | } | |
776 | } | |
777 | ||
778 | plen = (len + 3) & ~3; | |
194ccc88 | 779 | skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE, |
bdabad3e CC |
780 | msg->msg_flags & MSG_DONTWAIT, &rc); |
781 | if (!skb) | |
782 | goto out_node; | |
783 | ||
194ccc88 | 784 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
bdabad3e | 785 | |
e7044482 | 786 | rc = memcpy_from_msg(skb_put(skb, len), msg, len); |
bdabad3e CC |
787 | if (rc) { |
788 | kfree_skb(skb); | |
789 | goto out_node; | |
790 | } | |
791 | ||
bdabad3e CC |
792 | if (ipc->us.sq_port == QRTR_PORT_CTRL) { |
793 | if (len < 4) { | |
794 | rc = -EINVAL; | |
795 | kfree_skb(skb); | |
796 | goto out_node; | |
797 | } | |
798 | ||
799 | /* control messages already require the type as 'command' */ | |
e7044482 BA |
800 | skb_copy_bits(skb, 0, &type, 4); |
801 | type = le32_to_cpu(type); | |
bdabad3e CC |
802 | } |
803 | ||
e7044482 | 804 | rc = enqueue_fn(node, skb, type, &ipc->us, addr); |
bdabad3e CC |
805 | if (rc >= 0) |
806 | rc = len; | |
807 | ||
808 | out_node: | |
809 | qrtr_node_release(node); | |
810 | release_sock(sk); | |
811 | ||
812 | return rc; | |
813 | } | |
814 | ||
815 | static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, | |
816 | size_t size, int flags) | |
817 | { | |
818 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
bdabad3e CC |
819 | struct sock *sk = sock->sk; |
820 | struct sk_buff *skb; | |
f507a9b6 | 821 | struct qrtr_cb *cb; |
bdabad3e CC |
822 | int copied, rc; |
823 | ||
824 | lock_sock(sk); | |
825 | ||
826 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
827 | release_sock(sk); | |
828 | return -EADDRNOTAVAIL; | |
829 | } | |
830 | ||
831 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
832 | flags & MSG_DONTWAIT, &rc); | |
833 | if (!skb) { | |
834 | release_sock(sk); | |
835 | return rc; | |
836 | } | |
837 | ||
f507a9b6 | 838 | copied = skb->len; |
bdabad3e CC |
839 | if (copied > size) { |
840 | copied = size; | |
841 | msg->msg_flags |= MSG_TRUNC; | |
842 | } | |
843 | ||
f507a9b6 | 844 | rc = skb_copy_datagram_msg(skb, 0, msg, copied); |
bdabad3e CC |
845 | if (rc < 0) |
846 | goto out; | |
847 | rc = copied; | |
848 | ||
849 | if (addr) { | |
f507a9b6 | 850 | cb = (struct qrtr_cb *)skb->cb; |
bdabad3e | 851 | addr->sq_family = AF_QIPCRTR; |
f507a9b6 BA |
852 | addr->sq_node = cb->src_node; |
853 | addr->sq_port = cb->src_port; | |
bdabad3e CC |
854 | msg->msg_namelen = sizeof(*addr); |
855 | } | |
856 | ||
857 | out: | |
858 | skb_free_datagram(sk, skb); | |
859 | release_sock(sk); | |
860 | ||
861 | return rc; | |
862 | } | |
863 | ||
864 | static int qrtr_connect(struct socket *sock, struct sockaddr *saddr, | |
865 | int len, int flags) | |
866 | { | |
867 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
868 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
869 | struct sock *sk = sock->sk; | |
870 | int rc; | |
871 | ||
872 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
873 | return -EINVAL; | |
874 | ||
875 | lock_sock(sk); | |
876 | ||
877 | sk->sk_state = TCP_CLOSE; | |
878 | sock->state = SS_UNCONNECTED; | |
879 | ||
880 | rc = qrtr_autobind(sock); | |
881 | if (rc) { | |
882 | release_sock(sk); | |
883 | return rc; | |
884 | } | |
885 | ||
886 | ipc->peer = *addr; | |
887 | sock->state = SS_CONNECTED; | |
888 | sk->sk_state = TCP_ESTABLISHED; | |
889 | ||
890 | release_sock(sk); | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static int qrtr_getname(struct socket *sock, struct sockaddr *saddr, | |
9b2c45d4 | 896 | int peer) |
bdabad3e CC |
897 | { |
898 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
899 | struct sockaddr_qrtr qaddr; | |
900 | struct sock *sk = sock->sk; | |
901 | ||
902 | lock_sock(sk); | |
903 | if (peer) { | |
904 | if (sk->sk_state != TCP_ESTABLISHED) { | |
905 | release_sock(sk); | |
906 | return -ENOTCONN; | |
907 | } | |
908 | ||
909 | qaddr = ipc->peer; | |
910 | } else { | |
911 | qaddr = ipc->us; | |
912 | } | |
913 | release_sock(sk); | |
914 | ||
bdabad3e CC |
915 | qaddr.sq_family = AF_QIPCRTR; |
916 | ||
917 | memcpy(saddr, &qaddr, sizeof(qaddr)); | |
918 | ||
9b2c45d4 | 919 | return sizeof(qaddr); |
bdabad3e CC |
920 | } |
921 | ||
922 | static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
923 | { | |
924 | void __user *argp = (void __user *)arg; | |
925 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
926 | struct sock *sk = sock->sk; | |
927 | struct sockaddr_qrtr *sq; | |
928 | struct sk_buff *skb; | |
929 | struct ifreq ifr; | |
930 | long len = 0; | |
931 | int rc = 0; | |
932 | ||
933 | lock_sock(sk); | |
934 | ||
935 | switch (cmd) { | |
936 | case TIOCOUTQ: | |
937 | len = sk->sk_sndbuf - sk_wmem_alloc_get(sk); | |
938 | if (len < 0) | |
939 | len = 0; | |
940 | rc = put_user(len, (int __user *)argp); | |
941 | break; | |
942 | case TIOCINQ: | |
943 | skb = skb_peek(&sk->sk_receive_queue); | |
944 | if (skb) | |
f507a9b6 | 945 | len = skb->len; |
bdabad3e CC |
946 | rc = put_user(len, (int __user *)argp); |
947 | break; | |
948 | case SIOCGIFADDR: | |
949 | if (copy_from_user(&ifr, argp, sizeof(ifr))) { | |
950 | rc = -EFAULT; | |
951 | break; | |
952 | } | |
953 | ||
954 | sq = (struct sockaddr_qrtr *)&ifr.ifr_addr; | |
955 | *sq = ipc->us; | |
956 | if (copy_to_user(argp, &ifr, sizeof(ifr))) { | |
957 | rc = -EFAULT; | |
958 | break; | |
959 | } | |
960 | break; | |
961 | case SIOCGSTAMP: | |
962 | rc = sock_get_timestamp(sk, argp); | |
963 | break; | |
964 | case SIOCADDRT: | |
965 | case SIOCDELRT: | |
966 | case SIOCSIFADDR: | |
967 | case SIOCGIFDSTADDR: | |
968 | case SIOCSIFDSTADDR: | |
969 | case SIOCGIFBRDADDR: | |
970 | case SIOCSIFBRDADDR: | |
971 | case SIOCGIFNETMASK: | |
972 | case SIOCSIFNETMASK: | |
973 | rc = -EINVAL; | |
974 | break; | |
975 | default: | |
976 | rc = -ENOIOCTLCMD; | |
977 | break; | |
978 | } | |
979 | ||
980 | release_sock(sk); | |
981 | ||
982 | return rc; | |
983 | } | |
984 | ||
985 | static int qrtr_release(struct socket *sock) | |
986 | { | |
987 | struct sock *sk = sock->sk; | |
988 | struct qrtr_sock *ipc; | |
989 | ||
990 | if (!sk) | |
991 | return 0; | |
992 | ||
993 | lock_sock(sk); | |
994 | ||
995 | ipc = qrtr_sk(sk); | |
996 | sk->sk_shutdown = SHUTDOWN_MASK; | |
997 | if (!sock_flag(sk, SOCK_DEAD)) | |
998 | sk->sk_state_change(sk); | |
999 | ||
1000 | sock_set_flag(sk, SOCK_DEAD); | |
1001 | sock->sk = NULL; | |
1002 | ||
1003 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
1004 | qrtr_port_remove(ipc); | |
1005 | ||
1006 | skb_queue_purge(&sk->sk_receive_queue); | |
1007 | ||
1008 | release_sock(sk); | |
1009 | sock_put(sk); | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | static const struct proto_ops qrtr_proto_ops = { | |
1015 | .owner = THIS_MODULE, | |
1016 | .family = AF_QIPCRTR, | |
1017 | .bind = qrtr_bind, | |
1018 | .connect = qrtr_connect, | |
1019 | .socketpair = sock_no_socketpair, | |
1020 | .accept = sock_no_accept, | |
1021 | .listen = sock_no_listen, | |
1022 | .sendmsg = qrtr_sendmsg, | |
1023 | .recvmsg = qrtr_recvmsg, | |
1024 | .getname = qrtr_getname, | |
1025 | .ioctl = qrtr_ioctl, | |
a11e1d43 | 1026 | .poll = datagram_poll, |
bdabad3e CC |
1027 | .shutdown = sock_no_shutdown, |
1028 | .setsockopt = sock_no_setsockopt, | |
1029 | .getsockopt = sock_no_getsockopt, | |
1030 | .release = qrtr_release, | |
1031 | .mmap = sock_no_mmap, | |
1032 | .sendpage = sock_no_sendpage, | |
1033 | }; | |
1034 | ||
1035 | static struct proto qrtr_proto = { | |
1036 | .name = "QIPCRTR", | |
1037 | .owner = THIS_MODULE, | |
1038 | .obj_size = sizeof(struct qrtr_sock), | |
1039 | }; | |
1040 | ||
1041 | static int qrtr_create(struct net *net, struct socket *sock, | |
1042 | int protocol, int kern) | |
1043 | { | |
1044 | struct qrtr_sock *ipc; | |
1045 | struct sock *sk; | |
1046 | ||
1047 | if (sock->type != SOCK_DGRAM) | |
1048 | return -EPROTOTYPE; | |
1049 | ||
1050 | sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern); | |
1051 | if (!sk) | |
1052 | return -ENOMEM; | |
1053 | ||
1054 | sock_set_flag(sk, SOCK_ZAPPED); | |
1055 | ||
1056 | sock_init_data(sock, sk); | |
1057 | sock->ops = &qrtr_proto_ops; | |
1058 | ||
1059 | ipc = qrtr_sk(sk); | |
1060 | ipc->us.sq_family = AF_QIPCRTR; | |
1061 | ipc->us.sq_node = qrtr_local_nid; | |
1062 | ipc->us.sq_port = 0; | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static const struct nla_policy qrtr_policy[IFA_MAX + 1] = { | |
1068 | [IFA_LOCAL] = { .type = NLA_U32 }, | |
1069 | }; | |
1070 | ||
c21ef3e3 DA |
1071 | static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, |
1072 | struct netlink_ext_ack *extack) | |
bdabad3e CC |
1073 | { |
1074 | struct nlattr *tb[IFA_MAX + 1]; | |
1075 | struct ifaddrmsg *ifm; | |
1076 | int rc; | |
1077 | ||
1078 | if (!netlink_capable(skb, CAP_NET_ADMIN)) | |
1079 | return -EPERM; | |
1080 | ||
1081 | if (!netlink_capable(skb, CAP_SYS_ADMIN)) | |
1082 | return -EPERM; | |
1083 | ||
1084 | ASSERT_RTNL(); | |
1085 | ||
c21ef3e3 | 1086 | rc = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, qrtr_policy, extack); |
bdabad3e CC |
1087 | if (rc < 0) |
1088 | return rc; | |
1089 | ||
1090 | ifm = nlmsg_data(nlh); | |
1091 | if (!tb[IFA_LOCAL]) | |
1092 | return -EINVAL; | |
1093 | ||
1094 | qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]); | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static const struct net_proto_family qrtr_family = { | |
1099 | .owner = THIS_MODULE, | |
1100 | .family = AF_QIPCRTR, | |
1101 | .create = qrtr_create, | |
1102 | }; | |
1103 | ||
1104 | static int __init qrtr_proto_init(void) | |
1105 | { | |
1106 | int rc; | |
1107 | ||
1108 | rc = proto_register(&qrtr_proto, 1); | |
1109 | if (rc) | |
1110 | return rc; | |
1111 | ||
1112 | rc = sock_register(&qrtr_family); | |
1113 | if (rc) { | |
1114 | proto_unregister(&qrtr_proto); | |
1115 | return rc; | |
1116 | } | |
1117 | ||
c1c502b5 FW |
1118 | rc = rtnl_register_module(THIS_MODULE, PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, 0); |
1119 | if (rc) { | |
1120 | sock_unregister(qrtr_family.family); | |
1121 | proto_unregister(&qrtr_proto); | |
1122 | } | |
bdabad3e | 1123 | |
c1c502b5 | 1124 | return rc; |
bdabad3e | 1125 | } |
b7e732fa | 1126 | postcore_initcall(qrtr_proto_init); |
bdabad3e CC |
1127 | |
1128 | static void __exit qrtr_proto_fini(void) | |
1129 | { | |
1130 | rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR); | |
1131 | sock_unregister(qrtr_family.family); | |
1132 | proto_unregister(&qrtr_proto); | |
1133 | } | |
1134 | module_exit(qrtr_proto_fini); | |
1135 | ||
1136 | MODULE_DESCRIPTION("Qualcomm IPC-router driver"); | |
1137 | MODULE_LICENSE("GPL v2"); | |
77ac725e | 1138 | MODULE_ALIAS_NETPROTO(PF_QIPCRTR); |