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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 */ | |
98fa15f3 | 18 | #include <linux/numa.h> |
bdabad3e CC |
19 | |
20 | #include <net/sock.h> | |
21 | ||
22 | #include "qrtr.h" | |
23 | ||
194ccc88 BA |
24 | #define QRTR_PROTO_VER_1 1 |
25 | #define QRTR_PROTO_VER_2 3 | |
bdabad3e CC |
26 | |
27 | /* auto-bind range */ | |
28 | #define QRTR_MIN_EPH_SOCKET 0x4000 | |
29 | #define QRTR_MAX_EPH_SOCKET 0x7fff | |
30 | ||
bdabad3e | 31 | /** |
194ccc88 | 32 | * struct qrtr_hdr_v1 - (I|R)PCrouter packet header version 1 |
bdabad3e CC |
33 | * @version: protocol version |
34 | * @type: packet type; one of QRTR_TYPE_* | |
35 | * @src_node_id: source node | |
36 | * @src_port_id: source port | |
37 | * @confirm_rx: boolean; whether a resume-tx packet should be send in reply | |
38 | * @size: length of packet, excluding this header | |
39 | * @dst_node_id: destination node | |
40 | * @dst_port_id: destination port | |
41 | */ | |
194ccc88 | 42 | struct qrtr_hdr_v1 { |
bdabad3e CC |
43 | __le32 version; |
44 | __le32 type; | |
45 | __le32 src_node_id; | |
46 | __le32 src_port_id; | |
47 | __le32 confirm_rx; | |
48 | __le32 size; | |
49 | __le32 dst_node_id; | |
50 | __le32 dst_port_id; | |
51 | } __packed; | |
52 | ||
194ccc88 BA |
53 | /** |
54 | * struct qrtr_hdr_v2 - (I|R)PCrouter packet header later versions | |
55 | * @version: protocol version | |
56 | * @type: packet type; one of QRTR_TYPE_* | |
57 | * @flags: bitmask of QRTR_FLAGS_* | |
58 | * @optlen: length of optional header data | |
59 | * @size: length of packet, excluding this header and optlen | |
60 | * @src_node_id: source node | |
61 | * @src_port_id: source port | |
62 | * @dst_node_id: destination node | |
63 | * @dst_port_id: destination port | |
64 | */ | |
65 | struct qrtr_hdr_v2 { | |
66 | u8 version; | |
67 | u8 type; | |
68 | u8 flags; | |
69 | u8 optlen; | |
70 | __le32 size; | |
71 | __le16 src_node_id; | |
72 | __le16 src_port_id; | |
73 | __le16 dst_node_id; | |
74 | __le16 dst_port_id; | |
75 | }; | |
76 | ||
77 | #define QRTR_FLAGS_CONFIRM_RX BIT(0) | |
78 | ||
f507a9b6 BA |
79 | struct qrtr_cb { |
80 | u32 src_node; | |
81 | u32 src_port; | |
82 | u32 dst_node; | |
83 | u32 dst_port; | |
84 | ||
85 | u8 type; | |
86 | u8 confirm_rx; | |
87 | }; | |
88 | ||
194ccc88 BA |
89 | #define QRTR_HDR_MAX_SIZE max_t(size_t, sizeof(struct qrtr_hdr_v1), \ |
90 | sizeof(struct qrtr_hdr_v2)) | |
bdabad3e CC |
91 | |
92 | struct qrtr_sock { | |
93 | /* WARNING: sk must be the first member */ | |
94 | struct sock sk; | |
95 | struct sockaddr_qrtr us; | |
96 | struct sockaddr_qrtr peer; | |
97 | }; | |
98 | ||
99 | static inline struct qrtr_sock *qrtr_sk(struct sock *sk) | |
100 | { | |
101 | BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0); | |
102 | return container_of(sk, struct qrtr_sock, sk); | |
103 | } | |
104 | ||
98fa15f3 | 105 | static unsigned int qrtr_local_nid = NUMA_NO_NODE; |
bdabad3e CC |
106 | |
107 | /* for node ids */ | |
108 | static RADIX_TREE(qrtr_nodes, GFP_KERNEL); | |
109 | /* broadcast list */ | |
110 | static LIST_HEAD(qrtr_all_nodes); | |
111 | /* lock for qrtr_nodes, qrtr_all_nodes and node reference */ | |
112 | static DEFINE_MUTEX(qrtr_node_lock); | |
113 | ||
114 | /* local port allocation management */ | |
115 | static DEFINE_IDR(qrtr_ports); | |
116 | static DEFINE_MUTEX(qrtr_port_lock); | |
117 | ||
118 | /** | |
119 | * struct qrtr_node - endpoint node | |
120 | * @ep_lock: lock for endpoint management and callbacks | |
121 | * @ep: endpoint | |
122 | * @ref: reference count for node | |
123 | * @nid: node id | |
124 | * @rx_queue: receive queue | |
125 | * @work: scheduled work struct for recv work | |
126 | * @item: list item for broadcast list | |
127 | */ | |
128 | struct qrtr_node { | |
129 | struct mutex ep_lock; | |
130 | struct qrtr_endpoint *ep; | |
131 | struct kref ref; | |
132 | unsigned int nid; | |
133 | ||
134 | struct sk_buff_head rx_queue; | |
135 | struct work_struct work; | |
136 | struct list_head item; | |
137 | }; | |
138 | ||
e7044482 BA |
139 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
140 | int type, struct sockaddr_qrtr *from, | |
141 | struct sockaddr_qrtr *to); | |
142 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, | |
143 | int type, struct sockaddr_qrtr *from, | |
144 | struct sockaddr_qrtr *to); | |
8acc8ee4 | 145 | |
bdabad3e CC |
146 | /* Release node resources and free the node. |
147 | * | |
148 | * Do not call directly, use qrtr_node_release. To be used with | |
149 | * kref_put_mutex. As such, the node mutex is expected to be locked on call. | |
150 | */ | |
151 | static void __qrtr_node_release(struct kref *kref) | |
152 | { | |
153 | struct qrtr_node *node = container_of(kref, struct qrtr_node, ref); | |
154 | ||
155 | if (node->nid != QRTR_EP_NID_AUTO) | |
156 | radix_tree_delete(&qrtr_nodes, node->nid); | |
157 | ||
158 | list_del(&node->item); | |
159 | mutex_unlock(&qrtr_node_lock); | |
160 | ||
161 | skb_queue_purge(&node->rx_queue); | |
162 | kfree(node); | |
163 | } | |
164 | ||
165 | /* Increment reference to node. */ | |
166 | static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node) | |
167 | { | |
168 | if (node) | |
169 | kref_get(&node->ref); | |
170 | return node; | |
171 | } | |
172 | ||
173 | /* Decrement reference to node and release as necessary. */ | |
174 | static void qrtr_node_release(struct qrtr_node *node) | |
175 | { | |
176 | if (!node) | |
177 | return; | |
178 | kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock); | |
179 | } | |
180 | ||
181 | /* Pass an outgoing packet socket buffer to the endpoint driver. */ | |
e7044482 BA |
182 | static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
183 | int type, struct sockaddr_qrtr *from, | |
184 | struct sockaddr_qrtr *to) | |
bdabad3e | 185 | { |
194ccc88 | 186 | struct qrtr_hdr_v1 *hdr; |
e7044482 | 187 | size_t len = skb->len; |
bdabad3e CC |
188 | int rc = -ENODEV; |
189 | ||
194ccc88 BA |
190 | hdr = skb_push(skb, sizeof(*hdr)); |
191 | hdr->version = cpu_to_le32(QRTR_PROTO_VER_1); | |
e7044482 BA |
192 | hdr->type = cpu_to_le32(type); |
193 | hdr->src_node_id = cpu_to_le32(from->sq_node); | |
194 | hdr->src_port_id = cpu_to_le32(from->sq_port); | |
d27e77a3 AKN |
195 | if (to->sq_port == QRTR_PORT_CTRL) { |
196 | hdr->dst_node_id = cpu_to_le32(node->nid); | |
197 | hdr->dst_port_id = cpu_to_le32(QRTR_NODE_BCAST); | |
198 | } else { | |
199 | hdr->dst_node_id = cpu_to_le32(to->sq_node); | |
200 | hdr->dst_port_id = cpu_to_le32(to->sq_port); | |
201 | } | |
e7044482 BA |
202 | |
203 | hdr->size = cpu_to_le32(len); | |
204 | hdr->confirm_rx = 0; | |
205 | ||
206 | skb_put_padto(skb, ALIGN(len, 4)); | |
207 | ||
bdabad3e CC |
208 | mutex_lock(&node->ep_lock); |
209 | if (node->ep) | |
210 | rc = node->ep->xmit(node->ep, skb); | |
211 | else | |
212 | kfree_skb(skb); | |
213 | mutex_unlock(&node->ep_lock); | |
214 | ||
215 | return rc; | |
216 | } | |
217 | ||
218 | /* Lookup node by id. | |
219 | * | |
220 | * callers must release with qrtr_node_release() | |
221 | */ | |
222 | static struct qrtr_node *qrtr_node_lookup(unsigned int nid) | |
223 | { | |
224 | struct qrtr_node *node; | |
225 | ||
226 | mutex_lock(&qrtr_node_lock); | |
227 | node = radix_tree_lookup(&qrtr_nodes, nid); | |
228 | node = qrtr_node_acquire(node); | |
229 | mutex_unlock(&qrtr_node_lock); | |
230 | ||
231 | return node; | |
232 | } | |
233 | ||
234 | /* Assign node id to node. | |
235 | * | |
236 | * This is mostly useful for automatic node id assignment, based on | |
237 | * the source id in the incoming packet. | |
238 | */ | |
239 | static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid) | |
240 | { | |
241 | if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO) | |
242 | return; | |
243 | ||
244 | mutex_lock(&qrtr_node_lock); | |
245 | radix_tree_insert(&qrtr_nodes, nid, node); | |
246 | node->nid = nid; | |
247 | mutex_unlock(&qrtr_node_lock); | |
248 | } | |
249 | ||
250 | /** | |
251 | * qrtr_endpoint_post() - post incoming data | |
252 | * @ep: endpoint handle | |
253 | * @data: data pointer | |
254 | * @len: size of data in bytes | |
255 | * | |
256 | * Return: 0 on success; negative error code on failure | |
257 | */ | |
258 | int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len) | |
259 | { | |
260 | struct qrtr_node *node = ep->node; | |
194ccc88 BA |
261 | const struct qrtr_hdr_v1 *v1; |
262 | const struct qrtr_hdr_v2 *v2; | |
bdabad3e | 263 | struct sk_buff *skb; |
f507a9b6 | 264 | struct qrtr_cb *cb; |
bdabad3e | 265 | unsigned int size; |
bdabad3e | 266 | unsigned int ver; |
194ccc88 | 267 | size_t hdrlen; |
bdabad3e | 268 | |
194ccc88 | 269 | if (len & 3) |
bdabad3e CC |
270 | return -EINVAL; |
271 | ||
272 | skb = netdev_alloc_skb(NULL, len); | |
273 | if (!skb) | |
274 | return -ENOMEM; | |
275 | ||
f507a9b6 | 276 | cb = (struct qrtr_cb *)skb->cb; |
f507a9b6 | 277 | |
194ccc88 BA |
278 | /* Version field in v1 is little endian, so this works for both cases */ |
279 | ver = *(u8*)data; | |
280 | ||
281 | switch (ver) { | |
282 | case QRTR_PROTO_VER_1: | |
283 | v1 = data; | |
284 | hdrlen = sizeof(*v1); | |
285 | ||
286 | cb->type = le32_to_cpu(v1->type); | |
287 | cb->src_node = le32_to_cpu(v1->src_node_id); | |
288 | cb->src_port = le32_to_cpu(v1->src_port_id); | |
289 | cb->confirm_rx = !!v1->confirm_rx; | |
290 | cb->dst_node = le32_to_cpu(v1->dst_node_id); | |
291 | cb->dst_port = le32_to_cpu(v1->dst_port_id); | |
292 | ||
293 | size = le32_to_cpu(v1->size); | |
294 | break; | |
295 | case QRTR_PROTO_VER_2: | |
296 | v2 = data; | |
297 | hdrlen = sizeof(*v2) + v2->optlen; | |
298 | ||
299 | cb->type = v2->type; | |
300 | cb->confirm_rx = !!(v2->flags & QRTR_FLAGS_CONFIRM_RX); | |
301 | cb->src_node = le16_to_cpu(v2->src_node_id); | |
302 | cb->src_port = le16_to_cpu(v2->src_port_id); | |
303 | cb->dst_node = le16_to_cpu(v2->dst_node_id); | |
304 | cb->dst_port = le16_to_cpu(v2->dst_port_id); | |
305 | ||
306 | if (cb->src_port == (u16)QRTR_PORT_CTRL) | |
307 | cb->src_port = QRTR_PORT_CTRL; | |
308 | if (cb->dst_port == (u16)QRTR_PORT_CTRL) | |
309 | cb->dst_port = QRTR_PORT_CTRL; | |
310 | ||
311 | size = le32_to_cpu(v2->size); | |
312 | break; | |
313 | default: | |
314 | pr_err("qrtr: Invalid version %d\n", ver); | |
315 | goto err; | |
316 | } | |
317 | ||
318 | if (len != ALIGN(size, 4) + hdrlen) | |
319 | goto err; | |
320 | ||
321 | if (cb->dst_port != QRTR_PORT_CTRL && cb->type != QRTR_TYPE_DATA) | |
322 | goto err; | |
323 | ||
324 | skb_put_data(skb, data + hdrlen, size); | |
bdabad3e CC |
325 | |
326 | skb_queue_tail(&node->rx_queue, skb); | |
327 | schedule_work(&node->work); | |
328 | ||
329 | return 0; | |
194ccc88 BA |
330 | |
331 | err: | |
332 | kfree_skb(skb); | |
333 | return -EINVAL; | |
334 | ||
bdabad3e CC |
335 | } |
336 | EXPORT_SYMBOL_GPL(qrtr_endpoint_post); | |
337 | ||
1a7959c7 BA |
338 | /** |
339 | * qrtr_alloc_ctrl_packet() - allocate control packet skb | |
340 | * @pkt: reference to qrtr_ctrl_pkt pointer | |
341 | * | |
342 | * Returns newly allocated sk_buff, or NULL on failure | |
343 | * | |
344 | * This function allocates a sk_buff large enough to carry a qrtr_ctrl_pkt and | |
345 | * on success returns a reference to the control packet in @pkt. | |
346 | */ | |
347 | static struct sk_buff *qrtr_alloc_ctrl_packet(struct qrtr_ctrl_pkt **pkt) | |
bdabad3e | 348 | { |
1a7959c7 | 349 | const int pkt_len = sizeof(struct qrtr_ctrl_pkt); |
bdabad3e | 350 | struct sk_buff *skb; |
bdabad3e | 351 | |
194ccc88 | 352 | skb = alloc_skb(QRTR_HDR_MAX_SIZE + pkt_len, GFP_KERNEL); |
bdabad3e CC |
353 | if (!skb) |
354 | return NULL; | |
bdabad3e | 355 | |
194ccc88 | 356 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
1a7959c7 | 357 | *pkt = skb_put_zero(skb, pkt_len); |
1784473b BA |
358 | |
359 | return skb; | |
360 | } | |
361 | ||
bdabad3e CC |
362 | static struct qrtr_sock *qrtr_port_lookup(int port); |
363 | static void qrtr_port_put(struct qrtr_sock *ipc); | |
364 | ||
365 | /* Handle and route a received packet. | |
366 | * | |
367 | * This will auto-reply with resume-tx packet as necessary. | |
368 | */ | |
369 | static void qrtr_node_rx_work(struct work_struct *work) | |
370 | { | |
371 | struct qrtr_node *node = container_of(work, struct qrtr_node, work); | |
1a7959c7 | 372 | struct qrtr_ctrl_pkt *pkt; |
e7044482 BA |
373 | struct sockaddr_qrtr dst; |
374 | struct sockaddr_qrtr src; | |
bdabad3e CC |
375 | struct sk_buff *skb; |
376 | ||
377 | while ((skb = skb_dequeue(&node->rx_queue)) != NULL) { | |
bdabad3e | 378 | struct qrtr_sock *ipc; |
f507a9b6 | 379 | struct qrtr_cb *cb; |
bdabad3e CC |
380 | int confirm; |
381 | ||
f507a9b6 BA |
382 | cb = (struct qrtr_cb *)skb->cb; |
383 | src.sq_node = cb->src_node; | |
384 | src.sq_port = cb->src_port; | |
385 | dst.sq_node = cb->dst_node; | |
386 | dst.sq_port = cb->dst_port; | |
387 | confirm = !!cb->confirm_rx; | |
bdabad3e | 388 | |
f507a9b6 | 389 | qrtr_node_assign(node, cb->src_node); |
e7044482 | 390 | |
f507a9b6 | 391 | ipc = qrtr_port_lookup(cb->dst_port); |
bdabad3e CC |
392 | if (!ipc) { |
393 | kfree_skb(skb); | |
394 | } else { | |
395 | if (sock_queue_rcv_skb(&ipc->sk, skb)) | |
396 | kfree_skb(skb); | |
397 | ||
398 | qrtr_port_put(ipc); | |
399 | } | |
400 | ||
401 | if (confirm) { | |
1a7959c7 | 402 | skb = qrtr_alloc_ctrl_packet(&pkt); |
bdabad3e CC |
403 | if (!skb) |
404 | break; | |
e7044482 | 405 | |
1a7959c7 BA |
406 | pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX); |
407 | pkt->client.node = cpu_to_le32(dst.sq_node); | |
408 | pkt->client.port = cpu_to_le32(dst.sq_port); | |
409 | ||
e7044482 BA |
410 | if (qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, |
411 | &dst, &src)) | |
bdabad3e CC |
412 | break; |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | /** | |
418 | * qrtr_endpoint_register() - register a new endpoint | |
419 | * @ep: endpoint to register | |
420 | * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment | |
421 | * Return: 0 on success; negative error code on failure | |
422 | * | |
423 | * The specified endpoint must have the xmit function pointer set on call. | |
424 | */ | |
425 | int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid) | |
426 | { | |
427 | struct qrtr_node *node; | |
428 | ||
429 | if (!ep || !ep->xmit) | |
430 | return -EINVAL; | |
431 | ||
432 | node = kzalloc(sizeof(*node), GFP_KERNEL); | |
433 | if (!node) | |
434 | return -ENOMEM; | |
435 | ||
436 | INIT_WORK(&node->work, qrtr_node_rx_work); | |
437 | kref_init(&node->ref); | |
438 | mutex_init(&node->ep_lock); | |
439 | skb_queue_head_init(&node->rx_queue); | |
440 | node->nid = QRTR_EP_NID_AUTO; | |
441 | node->ep = ep; | |
442 | ||
443 | qrtr_node_assign(node, nid); | |
444 | ||
445 | mutex_lock(&qrtr_node_lock); | |
446 | list_add(&node->item, &qrtr_all_nodes); | |
447 | mutex_unlock(&qrtr_node_lock); | |
448 | ep->node = node; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | EXPORT_SYMBOL_GPL(qrtr_endpoint_register); | |
453 | ||
454 | /** | |
455 | * qrtr_endpoint_unregister - unregister endpoint | |
456 | * @ep: endpoint to unregister | |
457 | */ | |
458 | void qrtr_endpoint_unregister(struct qrtr_endpoint *ep) | |
459 | { | |
460 | struct qrtr_node *node = ep->node; | |
e7044482 BA |
461 | struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL}; |
462 | struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL}; | |
1a7959c7 | 463 | struct qrtr_ctrl_pkt *pkt; |
8acc8ee4 | 464 | struct sk_buff *skb; |
bdabad3e CC |
465 | |
466 | mutex_lock(&node->ep_lock); | |
467 | node->ep = NULL; | |
468 | mutex_unlock(&node->ep_lock); | |
469 | ||
8acc8ee4 | 470 | /* Notify the local controller about the event */ |
1a7959c7 BA |
471 | skb = qrtr_alloc_ctrl_packet(&pkt); |
472 | if (skb) { | |
473 | pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE); | |
e7044482 | 474 | qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst); |
1a7959c7 | 475 | } |
8acc8ee4 | 476 | |
bdabad3e CC |
477 | qrtr_node_release(node); |
478 | ep->node = NULL; | |
479 | } | |
480 | EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister); | |
481 | ||
482 | /* Lookup socket by port. | |
483 | * | |
484 | * Callers must release with qrtr_port_put() | |
485 | */ | |
486 | static struct qrtr_sock *qrtr_port_lookup(int port) | |
487 | { | |
488 | struct qrtr_sock *ipc; | |
489 | ||
490 | if (port == QRTR_PORT_CTRL) | |
491 | port = 0; | |
492 | ||
493 | mutex_lock(&qrtr_port_lock); | |
494 | ipc = idr_find(&qrtr_ports, port); | |
495 | if (ipc) | |
496 | sock_hold(&ipc->sk); | |
497 | mutex_unlock(&qrtr_port_lock); | |
498 | ||
499 | return ipc; | |
500 | } | |
501 | ||
502 | /* Release acquired socket. */ | |
503 | static void qrtr_port_put(struct qrtr_sock *ipc) | |
504 | { | |
505 | sock_put(&ipc->sk); | |
506 | } | |
507 | ||
508 | /* Remove port assignment. */ | |
509 | static void qrtr_port_remove(struct qrtr_sock *ipc) | |
510 | { | |
1a7959c7 | 511 | struct qrtr_ctrl_pkt *pkt; |
1784473b | 512 | struct sk_buff *skb; |
bdabad3e | 513 | int port = ipc->us.sq_port; |
e7044482 BA |
514 | struct sockaddr_qrtr to; |
515 | ||
516 | to.sq_family = AF_QIPCRTR; | |
517 | to.sq_node = QRTR_NODE_BCAST; | |
518 | to.sq_port = QRTR_PORT_CTRL; | |
bdabad3e | 519 | |
1a7959c7 | 520 | skb = qrtr_alloc_ctrl_packet(&pkt); |
1784473b | 521 | if (skb) { |
1a7959c7 BA |
522 | pkt->cmd = cpu_to_le32(QRTR_TYPE_DEL_CLIENT); |
523 | pkt->client.node = cpu_to_le32(ipc->us.sq_node); | |
524 | pkt->client.port = cpu_to_le32(ipc->us.sq_port); | |
525 | ||
1784473b | 526 | skb_set_owner_w(skb, &ipc->sk); |
e7044482 BA |
527 | qrtr_bcast_enqueue(NULL, skb, QRTR_TYPE_DEL_CLIENT, &ipc->us, |
528 | &to); | |
1784473b BA |
529 | } |
530 | ||
bdabad3e CC |
531 | if (port == QRTR_PORT_CTRL) |
532 | port = 0; | |
533 | ||
534 | __sock_put(&ipc->sk); | |
535 | ||
536 | mutex_lock(&qrtr_port_lock); | |
537 | idr_remove(&qrtr_ports, port); | |
538 | mutex_unlock(&qrtr_port_lock); | |
539 | } | |
540 | ||
541 | /* Assign port number to socket. | |
542 | * | |
543 | * Specify port in the integer pointed to by port, and it will be adjusted | |
544 | * on return as necesssary. | |
545 | * | |
546 | * Port may be: | |
547 | * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET] | |
548 | * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN | |
549 | * >QRTR_MIN_EPH_SOCKET: Specified; available to all | |
550 | */ | |
551 | static int qrtr_port_assign(struct qrtr_sock *ipc, int *port) | |
552 | { | |
553 | int rc; | |
554 | ||
555 | mutex_lock(&qrtr_port_lock); | |
556 | if (!*port) { | |
557 | rc = idr_alloc(&qrtr_ports, ipc, | |
558 | QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1, | |
559 | GFP_ATOMIC); | |
560 | if (rc >= 0) | |
561 | *port = rc; | |
562 | } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) { | |
563 | rc = -EACCES; | |
564 | } else if (*port == QRTR_PORT_CTRL) { | |
565 | rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC); | |
566 | } else { | |
567 | rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC); | |
568 | if (rc >= 0) | |
569 | *port = rc; | |
570 | } | |
571 | mutex_unlock(&qrtr_port_lock); | |
572 | ||
573 | if (rc == -ENOSPC) | |
574 | return -EADDRINUSE; | |
575 | else if (rc < 0) | |
576 | return rc; | |
577 | ||
578 | sock_hold(&ipc->sk); | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
b24844b1 BA |
583 | /* Reset all non-control ports */ |
584 | static void qrtr_reset_ports(void) | |
585 | { | |
586 | struct qrtr_sock *ipc; | |
587 | int id; | |
588 | ||
589 | mutex_lock(&qrtr_port_lock); | |
590 | idr_for_each_entry(&qrtr_ports, ipc, id) { | |
591 | /* Don't reset control port */ | |
592 | if (id == 0) | |
593 | continue; | |
594 | ||
595 | sock_hold(&ipc->sk); | |
596 | ipc->sk.sk_err = ENETRESET; | |
ae85bfa8 | 597 | ipc->sk.sk_error_report(&ipc->sk); |
b24844b1 BA |
598 | sock_put(&ipc->sk); |
599 | } | |
600 | mutex_unlock(&qrtr_port_lock); | |
601 | } | |
602 | ||
bdabad3e CC |
603 | /* Bind socket to address. |
604 | * | |
605 | * Socket should be locked upon call. | |
606 | */ | |
607 | static int __qrtr_bind(struct socket *sock, | |
608 | const struct sockaddr_qrtr *addr, int zapped) | |
609 | { | |
610 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
611 | struct sock *sk = sock->sk; | |
612 | int port; | |
613 | int rc; | |
614 | ||
615 | /* rebinding ok */ | |
616 | if (!zapped && addr->sq_port == ipc->us.sq_port) | |
617 | return 0; | |
618 | ||
619 | port = addr->sq_port; | |
620 | rc = qrtr_port_assign(ipc, &port); | |
621 | if (rc) | |
622 | return rc; | |
623 | ||
624 | /* unbind previous, if any */ | |
625 | if (!zapped) | |
626 | qrtr_port_remove(ipc); | |
627 | ipc->us.sq_port = port; | |
628 | ||
629 | sock_reset_flag(sk, SOCK_ZAPPED); | |
630 | ||
b24844b1 BA |
631 | /* Notify all open ports about the new controller */ |
632 | if (port == QRTR_PORT_CTRL) | |
633 | qrtr_reset_ports(); | |
634 | ||
bdabad3e CC |
635 | return 0; |
636 | } | |
637 | ||
638 | /* Auto bind to an ephemeral port. */ | |
639 | static int qrtr_autobind(struct socket *sock) | |
640 | { | |
641 | struct sock *sk = sock->sk; | |
642 | struct sockaddr_qrtr addr; | |
643 | ||
644 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
645 | return 0; | |
646 | ||
647 | addr.sq_family = AF_QIPCRTR; | |
648 | addr.sq_node = qrtr_local_nid; | |
649 | addr.sq_port = 0; | |
650 | ||
651 | return __qrtr_bind(sock, &addr, 1); | |
652 | } | |
653 | ||
654 | /* Bind socket to specified sockaddr. */ | |
655 | static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
656 | { | |
657 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
658 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
659 | struct sock *sk = sock->sk; | |
660 | int rc; | |
661 | ||
662 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
663 | return -EINVAL; | |
664 | ||
665 | if (addr->sq_node != ipc->us.sq_node) | |
666 | return -EINVAL; | |
667 | ||
668 | lock_sock(sk); | |
669 | rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED)); | |
670 | release_sock(sk); | |
671 | ||
672 | return rc; | |
673 | } | |
674 | ||
675 | /* Queue packet to local peer socket. */ | |
e7044482 BA |
676 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
677 | int type, struct sockaddr_qrtr *from, | |
678 | struct sockaddr_qrtr *to) | |
bdabad3e | 679 | { |
bdabad3e | 680 | struct qrtr_sock *ipc; |
f507a9b6 | 681 | struct qrtr_cb *cb; |
bdabad3e | 682 | |
e7044482 | 683 | ipc = qrtr_port_lookup(to->sq_port); |
bdabad3e CC |
684 | if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */ |
685 | kfree_skb(skb); | |
686 | return -ENODEV; | |
687 | } | |
688 | ||
f507a9b6 BA |
689 | cb = (struct qrtr_cb *)skb->cb; |
690 | cb->src_node = from->sq_node; | |
691 | cb->src_port = from->sq_port; | |
e7044482 | 692 | |
bdabad3e CC |
693 | if (sock_queue_rcv_skb(&ipc->sk, skb)) { |
694 | qrtr_port_put(ipc); | |
695 | kfree_skb(skb); | |
696 | return -ENOSPC; | |
697 | } | |
698 | ||
699 | qrtr_port_put(ipc); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | /* Queue packet for broadcast. */ | |
e7044482 BA |
705 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
706 | int type, struct sockaddr_qrtr *from, | |
707 | struct sockaddr_qrtr *to) | |
bdabad3e CC |
708 | { |
709 | struct sk_buff *skbn; | |
710 | ||
711 | mutex_lock(&qrtr_node_lock); | |
712 | list_for_each_entry(node, &qrtr_all_nodes, item) { | |
713 | skbn = skb_clone(skb, GFP_KERNEL); | |
714 | if (!skbn) | |
715 | break; | |
716 | skb_set_owner_w(skbn, skb->sk); | |
e7044482 | 717 | qrtr_node_enqueue(node, skbn, type, from, to); |
bdabad3e CC |
718 | } |
719 | mutex_unlock(&qrtr_node_lock); | |
720 | ||
e7044482 | 721 | qrtr_local_enqueue(node, skb, type, from, to); |
bdabad3e CC |
722 | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) | |
727 | { | |
728 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
e7044482 BA |
729 | int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *, int, |
730 | struct sockaddr_qrtr *, struct sockaddr_qrtr *); | |
bdabad3e CC |
731 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); |
732 | struct sock *sk = sock->sk; | |
733 | struct qrtr_node *node; | |
bdabad3e CC |
734 | struct sk_buff *skb; |
735 | size_t plen; | |
e7044482 | 736 | u32 type = QRTR_TYPE_DATA; |
bdabad3e CC |
737 | int rc; |
738 | ||
739 | if (msg->msg_flags & ~(MSG_DONTWAIT)) | |
740 | return -EINVAL; | |
741 | ||
742 | if (len > 65535) | |
743 | return -EMSGSIZE; | |
744 | ||
745 | lock_sock(sk); | |
746 | ||
747 | if (addr) { | |
748 | if (msg->msg_namelen < sizeof(*addr)) { | |
749 | release_sock(sk); | |
750 | return -EINVAL; | |
751 | } | |
752 | ||
753 | if (addr->sq_family != AF_QIPCRTR) { | |
754 | release_sock(sk); | |
755 | return -EINVAL; | |
756 | } | |
757 | ||
758 | rc = qrtr_autobind(sock); | |
759 | if (rc) { | |
760 | release_sock(sk); | |
761 | return rc; | |
762 | } | |
763 | } else if (sk->sk_state == TCP_ESTABLISHED) { | |
764 | addr = &ipc->peer; | |
765 | } else { | |
766 | release_sock(sk); | |
767 | return -ENOTCONN; | |
768 | } | |
769 | ||
770 | node = NULL; | |
771 | if (addr->sq_node == QRTR_NODE_BCAST) { | |
772 | enqueue_fn = qrtr_bcast_enqueue; | |
fdf5fd39 AKN |
773 | if (addr->sq_port != QRTR_PORT_CTRL) { |
774 | release_sock(sk); | |
775 | return -ENOTCONN; | |
776 | } | |
bdabad3e CC |
777 | } else if (addr->sq_node == ipc->us.sq_node) { |
778 | enqueue_fn = qrtr_local_enqueue; | |
779 | } else { | |
780 | enqueue_fn = qrtr_node_enqueue; | |
781 | node = qrtr_node_lookup(addr->sq_node); | |
782 | if (!node) { | |
783 | release_sock(sk); | |
784 | return -ECONNRESET; | |
785 | } | |
786 | } | |
787 | ||
788 | plen = (len + 3) & ~3; | |
194ccc88 | 789 | skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE, |
bdabad3e CC |
790 | msg->msg_flags & MSG_DONTWAIT, &rc); |
791 | if (!skb) | |
792 | goto out_node; | |
793 | ||
194ccc88 | 794 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
bdabad3e | 795 | |
e7044482 | 796 | rc = memcpy_from_msg(skb_put(skb, len), msg, len); |
bdabad3e CC |
797 | if (rc) { |
798 | kfree_skb(skb); | |
799 | goto out_node; | |
800 | } | |
801 | ||
bdabad3e CC |
802 | if (ipc->us.sq_port == QRTR_PORT_CTRL) { |
803 | if (len < 4) { | |
804 | rc = -EINVAL; | |
805 | kfree_skb(skb); | |
806 | goto out_node; | |
807 | } | |
808 | ||
809 | /* control messages already require the type as 'command' */ | |
e7044482 BA |
810 | skb_copy_bits(skb, 0, &type, 4); |
811 | type = le32_to_cpu(type); | |
bdabad3e CC |
812 | } |
813 | ||
e7044482 | 814 | rc = enqueue_fn(node, skb, type, &ipc->us, addr); |
bdabad3e CC |
815 | if (rc >= 0) |
816 | rc = len; | |
817 | ||
818 | out_node: | |
819 | qrtr_node_release(node); | |
820 | release_sock(sk); | |
821 | ||
822 | return rc; | |
823 | } | |
824 | ||
825 | static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, | |
826 | size_t size, int flags) | |
827 | { | |
828 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
bdabad3e CC |
829 | struct sock *sk = sock->sk; |
830 | struct sk_buff *skb; | |
f507a9b6 | 831 | struct qrtr_cb *cb; |
bdabad3e CC |
832 | int copied, rc; |
833 | ||
834 | lock_sock(sk); | |
835 | ||
836 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
837 | release_sock(sk); | |
838 | return -EADDRNOTAVAIL; | |
839 | } | |
840 | ||
841 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
842 | flags & MSG_DONTWAIT, &rc); | |
843 | if (!skb) { | |
844 | release_sock(sk); | |
845 | return rc; | |
846 | } | |
847 | ||
f507a9b6 | 848 | copied = skb->len; |
bdabad3e CC |
849 | if (copied > size) { |
850 | copied = size; | |
851 | msg->msg_flags |= MSG_TRUNC; | |
852 | } | |
853 | ||
f507a9b6 | 854 | rc = skb_copy_datagram_msg(skb, 0, msg, copied); |
bdabad3e CC |
855 | if (rc < 0) |
856 | goto out; | |
857 | rc = copied; | |
858 | ||
859 | if (addr) { | |
f507a9b6 | 860 | cb = (struct qrtr_cb *)skb->cb; |
bdabad3e | 861 | addr->sq_family = AF_QIPCRTR; |
f507a9b6 BA |
862 | addr->sq_node = cb->src_node; |
863 | addr->sq_port = cb->src_port; | |
bdabad3e CC |
864 | msg->msg_namelen = sizeof(*addr); |
865 | } | |
866 | ||
867 | out: | |
868 | skb_free_datagram(sk, skb); | |
869 | release_sock(sk); | |
870 | ||
871 | return rc; | |
872 | } | |
873 | ||
874 | static int qrtr_connect(struct socket *sock, struct sockaddr *saddr, | |
875 | int len, int flags) | |
876 | { | |
877 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
878 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
879 | struct sock *sk = sock->sk; | |
880 | int rc; | |
881 | ||
882 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
883 | return -EINVAL; | |
884 | ||
885 | lock_sock(sk); | |
886 | ||
887 | sk->sk_state = TCP_CLOSE; | |
888 | sock->state = SS_UNCONNECTED; | |
889 | ||
890 | rc = qrtr_autobind(sock); | |
891 | if (rc) { | |
892 | release_sock(sk); | |
893 | return rc; | |
894 | } | |
895 | ||
896 | ipc->peer = *addr; | |
897 | sock->state = SS_CONNECTED; | |
898 | sk->sk_state = TCP_ESTABLISHED; | |
899 | ||
900 | release_sock(sk); | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static int qrtr_getname(struct socket *sock, struct sockaddr *saddr, | |
9b2c45d4 | 906 | int peer) |
bdabad3e CC |
907 | { |
908 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
909 | struct sockaddr_qrtr qaddr; | |
910 | struct sock *sk = sock->sk; | |
911 | ||
912 | lock_sock(sk); | |
913 | if (peer) { | |
914 | if (sk->sk_state != TCP_ESTABLISHED) { | |
915 | release_sock(sk); | |
916 | return -ENOTCONN; | |
917 | } | |
918 | ||
919 | qaddr = ipc->peer; | |
920 | } else { | |
921 | qaddr = ipc->us; | |
922 | } | |
923 | release_sock(sk); | |
924 | ||
bdabad3e CC |
925 | qaddr.sq_family = AF_QIPCRTR; |
926 | ||
927 | memcpy(saddr, &qaddr, sizeof(qaddr)); | |
928 | ||
9b2c45d4 | 929 | return sizeof(qaddr); |
bdabad3e CC |
930 | } |
931 | ||
932 | static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
933 | { | |
934 | void __user *argp = (void __user *)arg; | |
935 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
936 | struct sock *sk = sock->sk; | |
937 | struct sockaddr_qrtr *sq; | |
938 | struct sk_buff *skb; | |
939 | struct ifreq ifr; | |
940 | long len = 0; | |
941 | int rc = 0; | |
942 | ||
943 | lock_sock(sk); | |
944 | ||
945 | switch (cmd) { | |
946 | case TIOCOUTQ: | |
947 | len = sk->sk_sndbuf - sk_wmem_alloc_get(sk); | |
948 | if (len < 0) | |
949 | len = 0; | |
950 | rc = put_user(len, (int __user *)argp); | |
951 | break; | |
952 | case TIOCINQ: | |
953 | skb = skb_peek(&sk->sk_receive_queue); | |
954 | if (skb) | |
f507a9b6 | 955 | len = skb->len; |
bdabad3e CC |
956 | rc = put_user(len, (int __user *)argp); |
957 | break; | |
958 | case SIOCGIFADDR: | |
959 | if (copy_from_user(&ifr, argp, sizeof(ifr))) { | |
960 | rc = -EFAULT; | |
961 | break; | |
962 | } | |
963 | ||
964 | sq = (struct sockaddr_qrtr *)&ifr.ifr_addr; | |
965 | *sq = ipc->us; | |
966 | if (copy_to_user(argp, &ifr, sizeof(ifr))) { | |
967 | rc = -EFAULT; | |
968 | break; | |
969 | } | |
970 | break; | |
bdabad3e CC |
971 | case SIOCADDRT: |
972 | case SIOCDELRT: | |
973 | case SIOCSIFADDR: | |
974 | case SIOCGIFDSTADDR: | |
975 | case SIOCSIFDSTADDR: | |
976 | case SIOCGIFBRDADDR: | |
977 | case SIOCSIFBRDADDR: | |
978 | case SIOCGIFNETMASK: | |
979 | case SIOCSIFNETMASK: | |
980 | rc = -EINVAL; | |
981 | break; | |
982 | default: | |
983 | rc = -ENOIOCTLCMD; | |
984 | break; | |
985 | } | |
986 | ||
987 | release_sock(sk); | |
988 | ||
989 | return rc; | |
990 | } | |
991 | ||
992 | static int qrtr_release(struct socket *sock) | |
993 | { | |
994 | struct sock *sk = sock->sk; | |
995 | struct qrtr_sock *ipc; | |
996 | ||
997 | if (!sk) | |
998 | return 0; | |
999 | ||
1000 | lock_sock(sk); | |
1001 | ||
1002 | ipc = qrtr_sk(sk); | |
1003 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1004 | if (!sock_flag(sk, SOCK_DEAD)) | |
1005 | sk->sk_state_change(sk); | |
1006 | ||
1007 | sock_set_flag(sk, SOCK_DEAD); | |
1008 | sock->sk = NULL; | |
1009 | ||
1010 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
1011 | qrtr_port_remove(ipc); | |
1012 | ||
1013 | skb_queue_purge(&sk->sk_receive_queue); | |
1014 | ||
1015 | release_sock(sk); | |
1016 | sock_put(sk); | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | static const struct proto_ops qrtr_proto_ops = { | |
1022 | .owner = THIS_MODULE, | |
1023 | .family = AF_QIPCRTR, | |
1024 | .bind = qrtr_bind, | |
1025 | .connect = qrtr_connect, | |
1026 | .socketpair = sock_no_socketpair, | |
1027 | .accept = sock_no_accept, | |
1028 | .listen = sock_no_listen, | |
1029 | .sendmsg = qrtr_sendmsg, | |
1030 | .recvmsg = qrtr_recvmsg, | |
1031 | .getname = qrtr_getname, | |
1032 | .ioctl = qrtr_ioctl, | |
c7cbdbf2 | 1033 | .gettstamp = sock_gettstamp, |
a11e1d43 | 1034 | .poll = datagram_poll, |
bdabad3e CC |
1035 | .shutdown = sock_no_shutdown, |
1036 | .setsockopt = sock_no_setsockopt, | |
1037 | .getsockopt = sock_no_getsockopt, | |
1038 | .release = qrtr_release, | |
1039 | .mmap = sock_no_mmap, | |
1040 | .sendpage = sock_no_sendpage, | |
1041 | }; | |
1042 | ||
1043 | static struct proto qrtr_proto = { | |
1044 | .name = "QIPCRTR", | |
1045 | .owner = THIS_MODULE, | |
1046 | .obj_size = sizeof(struct qrtr_sock), | |
1047 | }; | |
1048 | ||
1049 | static int qrtr_create(struct net *net, struct socket *sock, | |
1050 | int protocol, int kern) | |
1051 | { | |
1052 | struct qrtr_sock *ipc; | |
1053 | struct sock *sk; | |
1054 | ||
1055 | if (sock->type != SOCK_DGRAM) | |
1056 | return -EPROTOTYPE; | |
1057 | ||
1058 | sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern); | |
1059 | if (!sk) | |
1060 | return -ENOMEM; | |
1061 | ||
1062 | sock_set_flag(sk, SOCK_ZAPPED); | |
1063 | ||
1064 | sock_init_data(sock, sk); | |
1065 | sock->ops = &qrtr_proto_ops; | |
1066 | ||
1067 | ipc = qrtr_sk(sk); | |
1068 | ipc->us.sq_family = AF_QIPCRTR; | |
1069 | ipc->us.sq_node = qrtr_local_nid; | |
1070 | ipc->us.sq_port = 0; | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | static const struct nla_policy qrtr_policy[IFA_MAX + 1] = { | |
1076 | [IFA_LOCAL] = { .type = NLA_U32 }, | |
1077 | }; | |
1078 | ||
c21ef3e3 DA |
1079 | static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, |
1080 | struct netlink_ext_ack *extack) | |
bdabad3e CC |
1081 | { |
1082 | struct nlattr *tb[IFA_MAX + 1]; | |
1083 | struct ifaddrmsg *ifm; | |
1084 | int rc; | |
1085 | ||
1086 | if (!netlink_capable(skb, CAP_NET_ADMIN)) | |
1087 | return -EPERM; | |
1088 | ||
1089 | if (!netlink_capable(skb, CAP_SYS_ADMIN)) | |
1090 | return -EPERM; | |
1091 | ||
1092 | ASSERT_RTNL(); | |
1093 | ||
8cb08174 JB |
1094 | rc = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
1095 | qrtr_policy, extack); | |
bdabad3e CC |
1096 | if (rc < 0) |
1097 | return rc; | |
1098 | ||
1099 | ifm = nlmsg_data(nlh); | |
1100 | if (!tb[IFA_LOCAL]) | |
1101 | return -EINVAL; | |
1102 | ||
1103 | qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]); | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | static const struct net_proto_family qrtr_family = { | |
1108 | .owner = THIS_MODULE, | |
1109 | .family = AF_QIPCRTR, | |
1110 | .create = qrtr_create, | |
1111 | }; | |
1112 | ||
1113 | static int __init qrtr_proto_init(void) | |
1114 | { | |
1115 | int rc; | |
1116 | ||
1117 | rc = proto_register(&qrtr_proto, 1); | |
1118 | if (rc) | |
1119 | return rc; | |
1120 | ||
1121 | rc = sock_register(&qrtr_family); | |
1122 | if (rc) { | |
1123 | proto_unregister(&qrtr_proto); | |
1124 | return rc; | |
1125 | } | |
1126 | ||
c1c502b5 FW |
1127 | rc = rtnl_register_module(THIS_MODULE, PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, 0); |
1128 | if (rc) { | |
1129 | sock_unregister(qrtr_family.family); | |
1130 | proto_unregister(&qrtr_proto); | |
1131 | } | |
bdabad3e | 1132 | |
c1c502b5 | 1133 | return rc; |
bdabad3e | 1134 | } |
b7e732fa | 1135 | postcore_initcall(qrtr_proto_init); |
bdabad3e CC |
1136 | |
1137 | static void __exit qrtr_proto_fini(void) | |
1138 | { | |
1139 | rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR); | |
1140 | sock_unregister(qrtr_family.family); | |
1141 | proto_unregister(&qrtr_proto); | |
1142 | } | |
1143 | module_exit(qrtr_proto_fini); | |
1144 | ||
1145 | MODULE_DESCRIPTION("Qualcomm IPC-router driver"); | |
1146 | MODULE_LICENSE("GPL v2"); | |
77ac725e | 1147 | MODULE_ALIAS_NETPROTO(PF_QIPCRTR); |