Commit | Line | Data |
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97fb5e8d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
bdabad3e CC |
2 | /* |
3 | * Copyright (c) 2015, Sony Mobile Communications Inc. | |
4 | * Copyright (c) 2013, The Linux Foundation. All rights reserved. | |
bdabad3e CC |
5 | */ |
6 | #include <linux/module.h> | |
7 | #include <linux/netlink.h> | |
8 | #include <linux/qrtr.h> | |
9 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
98fa15f3 | 10 | #include <linux/numa.h> |
bdabad3e CC |
11 | |
12 | #include <net/sock.h> | |
13 | ||
14 | #include "qrtr.h" | |
15 | ||
194ccc88 BA |
16 | #define QRTR_PROTO_VER_1 1 |
17 | #define QRTR_PROTO_VER_2 3 | |
bdabad3e CC |
18 | |
19 | /* auto-bind range */ | |
20 | #define QRTR_MIN_EPH_SOCKET 0x4000 | |
21 | #define QRTR_MAX_EPH_SOCKET 0x7fff | |
22 | ||
bdabad3e | 23 | /** |
194ccc88 | 24 | * struct qrtr_hdr_v1 - (I|R)PCrouter packet header version 1 |
bdabad3e CC |
25 | * @version: protocol version |
26 | * @type: packet type; one of QRTR_TYPE_* | |
27 | * @src_node_id: source node | |
28 | * @src_port_id: source port | |
29 | * @confirm_rx: boolean; whether a resume-tx packet should be send in reply | |
30 | * @size: length of packet, excluding this header | |
31 | * @dst_node_id: destination node | |
32 | * @dst_port_id: destination port | |
33 | */ | |
194ccc88 | 34 | struct qrtr_hdr_v1 { |
bdabad3e CC |
35 | __le32 version; |
36 | __le32 type; | |
37 | __le32 src_node_id; | |
38 | __le32 src_port_id; | |
39 | __le32 confirm_rx; | |
40 | __le32 size; | |
41 | __le32 dst_node_id; | |
42 | __le32 dst_port_id; | |
43 | } __packed; | |
44 | ||
194ccc88 BA |
45 | /** |
46 | * struct qrtr_hdr_v2 - (I|R)PCrouter packet header later versions | |
47 | * @version: protocol version | |
48 | * @type: packet type; one of QRTR_TYPE_* | |
49 | * @flags: bitmask of QRTR_FLAGS_* | |
50 | * @optlen: length of optional header data | |
51 | * @size: length of packet, excluding this header and optlen | |
52 | * @src_node_id: source node | |
53 | * @src_port_id: source port | |
54 | * @dst_node_id: destination node | |
55 | * @dst_port_id: destination port | |
56 | */ | |
57 | struct qrtr_hdr_v2 { | |
58 | u8 version; | |
59 | u8 type; | |
60 | u8 flags; | |
61 | u8 optlen; | |
62 | __le32 size; | |
63 | __le16 src_node_id; | |
64 | __le16 src_port_id; | |
65 | __le16 dst_node_id; | |
66 | __le16 dst_port_id; | |
67 | }; | |
68 | ||
69 | #define QRTR_FLAGS_CONFIRM_RX BIT(0) | |
70 | ||
f507a9b6 BA |
71 | struct qrtr_cb { |
72 | u32 src_node; | |
73 | u32 src_port; | |
74 | u32 dst_node; | |
75 | u32 dst_port; | |
76 | ||
77 | u8 type; | |
78 | u8 confirm_rx; | |
79 | }; | |
80 | ||
194ccc88 BA |
81 | #define QRTR_HDR_MAX_SIZE max_t(size_t, sizeof(struct qrtr_hdr_v1), \ |
82 | sizeof(struct qrtr_hdr_v2)) | |
bdabad3e CC |
83 | |
84 | struct qrtr_sock { | |
85 | /* WARNING: sk must be the first member */ | |
86 | struct sock sk; | |
87 | struct sockaddr_qrtr us; | |
88 | struct sockaddr_qrtr peer; | |
89 | }; | |
90 | ||
91 | static inline struct qrtr_sock *qrtr_sk(struct sock *sk) | |
92 | { | |
93 | BUILD_BUG_ON(offsetof(struct qrtr_sock, sk) != 0); | |
94 | return container_of(sk, struct qrtr_sock, sk); | |
95 | } | |
96 | ||
98fa15f3 | 97 | static unsigned int qrtr_local_nid = NUMA_NO_NODE; |
bdabad3e CC |
98 | |
99 | /* for node ids */ | |
100 | static RADIX_TREE(qrtr_nodes, GFP_KERNEL); | |
101 | /* broadcast list */ | |
102 | static LIST_HEAD(qrtr_all_nodes); | |
103 | /* lock for qrtr_nodes, qrtr_all_nodes and node reference */ | |
104 | static DEFINE_MUTEX(qrtr_node_lock); | |
105 | ||
106 | /* local port allocation management */ | |
107 | static DEFINE_IDR(qrtr_ports); | |
108 | static DEFINE_MUTEX(qrtr_port_lock); | |
109 | ||
110 | /** | |
111 | * struct qrtr_node - endpoint node | |
112 | * @ep_lock: lock for endpoint management and callbacks | |
113 | * @ep: endpoint | |
114 | * @ref: reference count for node | |
115 | * @nid: node id | |
116 | * @rx_queue: receive queue | |
117 | * @work: scheduled work struct for recv work | |
118 | * @item: list item for broadcast list | |
119 | */ | |
120 | struct qrtr_node { | |
121 | struct mutex ep_lock; | |
122 | struct qrtr_endpoint *ep; | |
123 | struct kref ref; | |
124 | unsigned int nid; | |
125 | ||
126 | struct sk_buff_head rx_queue; | |
127 | struct work_struct work; | |
128 | struct list_head item; | |
129 | }; | |
130 | ||
e7044482 BA |
131 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
132 | int type, struct sockaddr_qrtr *from, | |
133 | struct sockaddr_qrtr *to); | |
134 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, | |
135 | int type, struct sockaddr_qrtr *from, | |
136 | struct sockaddr_qrtr *to); | |
8acc8ee4 | 137 | |
bdabad3e CC |
138 | /* Release node resources and free the node. |
139 | * | |
140 | * Do not call directly, use qrtr_node_release. To be used with | |
141 | * kref_put_mutex. As such, the node mutex is expected to be locked on call. | |
142 | */ | |
143 | static void __qrtr_node_release(struct kref *kref) | |
144 | { | |
145 | struct qrtr_node *node = container_of(kref, struct qrtr_node, ref); | |
146 | ||
147 | if (node->nid != QRTR_EP_NID_AUTO) | |
148 | radix_tree_delete(&qrtr_nodes, node->nid); | |
149 | ||
150 | list_del(&node->item); | |
151 | mutex_unlock(&qrtr_node_lock); | |
152 | ||
153 | skb_queue_purge(&node->rx_queue); | |
154 | kfree(node); | |
155 | } | |
156 | ||
157 | /* Increment reference to node. */ | |
158 | static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node) | |
159 | { | |
160 | if (node) | |
161 | kref_get(&node->ref); | |
162 | return node; | |
163 | } | |
164 | ||
165 | /* Decrement reference to node and release as necessary. */ | |
166 | static void qrtr_node_release(struct qrtr_node *node) | |
167 | { | |
168 | if (!node) | |
169 | return; | |
170 | kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock); | |
171 | } | |
172 | ||
173 | /* Pass an outgoing packet socket buffer to the endpoint driver. */ | |
e7044482 BA |
174 | static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
175 | int type, struct sockaddr_qrtr *from, | |
176 | struct sockaddr_qrtr *to) | |
bdabad3e | 177 | { |
194ccc88 | 178 | struct qrtr_hdr_v1 *hdr; |
e7044482 | 179 | size_t len = skb->len; |
bdabad3e CC |
180 | int rc = -ENODEV; |
181 | ||
194ccc88 BA |
182 | hdr = skb_push(skb, sizeof(*hdr)); |
183 | hdr->version = cpu_to_le32(QRTR_PROTO_VER_1); | |
e7044482 BA |
184 | hdr->type = cpu_to_le32(type); |
185 | hdr->src_node_id = cpu_to_le32(from->sq_node); | |
186 | hdr->src_port_id = cpu_to_le32(from->sq_port); | |
d27e77a3 AKN |
187 | if (to->sq_port == QRTR_PORT_CTRL) { |
188 | hdr->dst_node_id = cpu_to_le32(node->nid); | |
189 | hdr->dst_port_id = cpu_to_le32(QRTR_NODE_BCAST); | |
190 | } else { | |
191 | hdr->dst_node_id = cpu_to_le32(to->sq_node); | |
192 | hdr->dst_port_id = cpu_to_le32(to->sq_port); | |
193 | } | |
e7044482 BA |
194 | |
195 | hdr->size = cpu_to_le32(len); | |
196 | hdr->confirm_rx = 0; | |
197 | ||
198 | skb_put_padto(skb, ALIGN(len, 4)); | |
199 | ||
bdabad3e CC |
200 | mutex_lock(&node->ep_lock); |
201 | if (node->ep) | |
202 | rc = node->ep->xmit(node->ep, skb); | |
203 | else | |
204 | kfree_skb(skb); | |
205 | mutex_unlock(&node->ep_lock); | |
206 | ||
207 | return rc; | |
208 | } | |
209 | ||
210 | /* Lookup node by id. | |
211 | * | |
212 | * callers must release with qrtr_node_release() | |
213 | */ | |
214 | static struct qrtr_node *qrtr_node_lookup(unsigned int nid) | |
215 | { | |
216 | struct qrtr_node *node; | |
217 | ||
218 | mutex_lock(&qrtr_node_lock); | |
219 | node = radix_tree_lookup(&qrtr_nodes, nid); | |
220 | node = qrtr_node_acquire(node); | |
221 | mutex_unlock(&qrtr_node_lock); | |
222 | ||
223 | return node; | |
224 | } | |
225 | ||
226 | /* Assign node id to node. | |
227 | * | |
228 | * This is mostly useful for automatic node id assignment, based on | |
229 | * the source id in the incoming packet. | |
230 | */ | |
231 | static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid) | |
232 | { | |
233 | if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO) | |
234 | return; | |
235 | ||
236 | mutex_lock(&qrtr_node_lock); | |
237 | radix_tree_insert(&qrtr_nodes, nid, node); | |
238 | node->nid = nid; | |
239 | mutex_unlock(&qrtr_node_lock); | |
240 | } | |
241 | ||
242 | /** | |
243 | * qrtr_endpoint_post() - post incoming data | |
244 | * @ep: endpoint handle | |
245 | * @data: data pointer | |
246 | * @len: size of data in bytes | |
247 | * | |
248 | * Return: 0 on success; negative error code on failure | |
249 | */ | |
250 | int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len) | |
251 | { | |
252 | struct qrtr_node *node = ep->node; | |
194ccc88 BA |
253 | const struct qrtr_hdr_v1 *v1; |
254 | const struct qrtr_hdr_v2 *v2; | |
bdabad3e | 255 | struct sk_buff *skb; |
f507a9b6 | 256 | struct qrtr_cb *cb; |
bdabad3e | 257 | unsigned int size; |
bdabad3e | 258 | unsigned int ver; |
194ccc88 | 259 | size_t hdrlen; |
bdabad3e | 260 | |
194ccc88 | 261 | if (len & 3) |
bdabad3e CC |
262 | return -EINVAL; |
263 | ||
264 | skb = netdev_alloc_skb(NULL, len); | |
265 | if (!skb) | |
266 | return -ENOMEM; | |
267 | ||
f507a9b6 | 268 | cb = (struct qrtr_cb *)skb->cb; |
f507a9b6 | 269 | |
194ccc88 BA |
270 | /* Version field in v1 is little endian, so this works for both cases */ |
271 | ver = *(u8*)data; | |
272 | ||
273 | switch (ver) { | |
274 | case QRTR_PROTO_VER_1: | |
275 | v1 = data; | |
276 | hdrlen = sizeof(*v1); | |
277 | ||
278 | cb->type = le32_to_cpu(v1->type); | |
279 | cb->src_node = le32_to_cpu(v1->src_node_id); | |
280 | cb->src_port = le32_to_cpu(v1->src_port_id); | |
281 | cb->confirm_rx = !!v1->confirm_rx; | |
282 | cb->dst_node = le32_to_cpu(v1->dst_node_id); | |
283 | cb->dst_port = le32_to_cpu(v1->dst_port_id); | |
284 | ||
285 | size = le32_to_cpu(v1->size); | |
286 | break; | |
287 | case QRTR_PROTO_VER_2: | |
288 | v2 = data; | |
289 | hdrlen = sizeof(*v2) + v2->optlen; | |
290 | ||
291 | cb->type = v2->type; | |
292 | cb->confirm_rx = !!(v2->flags & QRTR_FLAGS_CONFIRM_RX); | |
293 | cb->src_node = le16_to_cpu(v2->src_node_id); | |
294 | cb->src_port = le16_to_cpu(v2->src_port_id); | |
295 | cb->dst_node = le16_to_cpu(v2->dst_node_id); | |
296 | cb->dst_port = le16_to_cpu(v2->dst_port_id); | |
297 | ||
298 | if (cb->src_port == (u16)QRTR_PORT_CTRL) | |
299 | cb->src_port = QRTR_PORT_CTRL; | |
300 | if (cb->dst_port == (u16)QRTR_PORT_CTRL) | |
301 | cb->dst_port = QRTR_PORT_CTRL; | |
302 | ||
303 | size = le32_to_cpu(v2->size); | |
304 | break; | |
305 | default: | |
306 | pr_err("qrtr: Invalid version %d\n", ver); | |
307 | goto err; | |
308 | } | |
309 | ||
310 | if (len != ALIGN(size, 4) + hdrlen) | |
311 | goto err; | |
312 | ||
313 | if (cb->dst_port != QRTR_PORT_CTRL && cb->type != QRTR_TYPE_DATA) | |
314 | goto err; | |
315 | ||
316 | skb_put_data(skb, data + hdrlen, size); | |
bdabad3e CC |
317 | |
318 | skb_queue_tail(&node->rx_queue, skb); | |
319 | schedule_work(&node->work); | |
320 | ||
321 | return 0; | |
194ccc88 BA |
322 | |
323 | err: | |
324 | kfree_skb(skb); | |
325 | return -EINVAL; | |
326 | ||
bdabad3e CC |
327 | } |
328 | EXPORT_SYMBOL_GPL(qrtr_endpoint_post); | |
329 | ||
1a7959c7 BA |
330 | /** |
331 | * qrtr_alloc_ctrl_packet() - allocate control packet skb | |
332 | * @pkt: reference to qrtr_ctrl_pkt pointer | |
333 | * | |
334 | * Returns newly allocated sk_buff, or NULL on failure | |
335 | * | |
336 | * This function allocates a sk_buff large enough to carry a qrtr_ctrl_pkt and | |
337 | * on success returns a reference to the control packet in @pkt. | |
338 | */ | |
339 | static struct sk_buff *qrtr_alloc_ctrl_packet(struct qrtr_ctrl_pkt **pkt) | |
bdabad3e | 340 | { |
1a7959c7 | 341 | const int pkt_len = sizeof(struct qrtr_ctrl_pkt); |
bdabad3e | 342 | struct sk_buff *skb; |
bdabad3e | 343 | |
194ccc88 | 344 | skb = alloc_skb(QRTR_HDR_MAX_SIZE + pkt_len, GFP_KERNEL); |
bdabad3e CC |
345 | if (!skb) |
346 | return NULL; | |
bdabad3e | 347 | |
194ccc88 | 348 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
1a7959c7 | 349 | *pkt = skb_put_zero(skb, pkt_len); |
1784473b BA |
350 | |
351 | return skb; | |
352 | } | |
353 | ||
bdabad3e CC |
354 | static struct qrtr_sock *qrtr_port_lookup(int port); |
355 | static void qrtr_port_put(struct qrtr_sock *ipc); | |
356 | ||
357 | /* Handle and route a received packet. | |
358 | * | |
359 | * This will auto-reply with resume-tx packet as necessary. | |
360 | */ | |
361 | static void qrtr_node_rx_work(struct work_struct *work) | |
362 | { | |
363 | struct qrtr_node *node = container_of(work, struct qrtr_node, work); | |
1a7959c7 | 364 | struct qrtr_ctrl_pkt *pkt; |
e7044482 BA |
365 | struct sockaddr_qrtr dst; |
366 | struct sockaddr_qrtr src; | |
bdabad3e CC |
367 | struct sk_buff *skb; |
368 | ||
369 | while ((skb = skb_dequeue(&node->rx_queue)) != NULL) { | |
bdabad3e | 370 | struct qrtr_sock *ipc; |
f507a9b6 | 371 | struct qrtr_cb *cb; |
bdabad3e CC |
372 | int confirm; |
373 | ||
f507a9b6 BA |
374 | cb = (struct qrtr_cb *)skb->cb; |
375 | src.sq_node = cb->src_node; | |
376 | src.sq_port = cb->src_port; | |
377 | dst.sq_node = cb->dst_node; | |
378 | dst.sq_port = cb->dst_port; | |
379 | confirm = !!cb->confirm_rx; | |
bdabad3e | 380 | |
f507a9b6 | 381 | qrtr_node_assign(node, cb->src_node); |
e7044482 | 382 | |
f507a9b6 | 383 | ipc = qrtr_port_lookup(cb->dst_port); |
bdabad3e CC |
384 | if (!ipc) { |
385 | kfree_skb(skb); | |
386 | } else { | |
387 | if (sock_queue_rcv_skb(&ipc->sk, skb)) | |
388 | kfree_skb(skb); | |
389 | ||
390 | qrtr_port_put(ipc); | |
391 | } | |
392 | ||
393 | if (confirm) { | |
1a7959c7 | 394 | skb = qrtr_alloc_ctrl_packet(&pkt); |
bdabad3e CC |
395 | if (!skb) |
396 | break; | |
e7044482 | 397 | |
1a7959c7 BA |
398 | pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX); |
399 | pkt->client.node = cpu_to_le32(dst.sq_node); | |
400 | pkt->client.port = cpu_to_le32(dst.sq_port); | |
401 | ||
e7044482 BA |
402 | if (qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, |
403 | &dst, &src)) | |
bdabad3e CC |
404 | break; |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | /** | |
410 | * qrtr_endpoint_register() - register a new endpoint | |
411 | * @ep: endpoint to register | |
412 | * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment | |
413 | * Return: 0 on success; negative error code on failure | |
414 | * | |
415 | * The specified endpoint must have the xmit function pointer set on call. | |
416 | */ | |
417 | int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid) | |
418 | { | |
419 | struct qrtr_node *node; | |
420 | ||
421 | if (!ep || !ep->xmit) | |
422 | return -EINVAL; | |
423 | ||
424 | node = kzalloc(sizeof(*node), GFP_KERNEL); | |
425 | if (!node) | |
426 | return -ENOMEM; | |
427 | ||
428 | INIT_WORK(&node->work, qrtr_node_rx_work); | |
429 | kref_init(&node->ref); | |
430 | mutex_init(&node->ep_lock); | |
431 | skb_queue_head_init(&node->rx_queue); | |
432 | node->nid = QRTR_EP_NID_AUTO; | |
433 | node->ep = ep; | |
434 | ||
435 | qrtr_node_assign(node, nid); | |
436 | ||
437 | mutex_lock(&qrtr_node_lock); | |
438 | list_add(&node->item, &qrtr_all_nodes); | |
439 | mutex_unlock(&qrtr_node_lock); | |
440 | ep->node = node; | |
441 | ||
442 | return 0; | |
443 | } | |
444 | EXPORT_SYMBOL_GPL(qrtr_endpoint_register); | |
445 | ||
446 | /** | |
447 | * qrtr_endpoint_unregister - unregister endpoint | |
448 | * @ep: endpoint to unregister | |
449 | */ | |
450 | void qrtr_endpoint_unregister(struct qrtr_endpoint *ep) | |
451 | { | |
452 | struct qrtr_node *node = ep->node; | |
e7044482 BA |
453 | struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL}; |
454 | struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL}; | |
1a7959c7 | 455 | struct qrtr_ctrl_pkt *pkt; |
8acc8ee4 | 456 | struct sk_buff *skb; |
bdabad3e CC |
457 | |
458 | mutex_lock(&node->ep_lock); | |
459 | node->ep = NULL; | |
460 | mutex_unlock(&node->ep_lock); | |
461 | ||
8acc8ee4 | 462 | /* Notify the local controller about the event */ |
1a7959c7 BA |
463 | skb = qrtr_alloc_ctrl_packet(&pkt); |
464 | if (skb) { | |
465 | pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE); | |
e7044482 | 466 | qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst); |
1a7959c7 | 467 | } |
8acc8ee4 | 468 | |
bdabad3e CC |
469 | qrtr_node_release(node); |
470 | ep->node = NULL; | |
471 | } | |
472 | EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister); | |
473 | ||
474 | /* Lookup socket by port. | |
475 | * | |
476 | * Callers must release with qrtr_port_put() | |
477 | */ | |
478 | static struct qrtr_sock *qrtr_port_lookup(int port) | |
479 | { | |
480 | struct qrtr_sock *ipc; | |
481 | ||
482 | if (port == QRTR_PORT_CTRL) | |
483 | port = 0; | |
484 | ||
485 | mutex_lock(&qrtr_port_lock); | |
486 | ipc = idr_find(&qrtr_ports, port); | |
487 | if (ipc) | |
488 | sock_hold(&ipc->sk); | |
489 | mutex_unlock(&qrtr_port_lock); | |
490 | ||
491 | return ipc; | |
492 | } | |
493 | ||
494 | /* Release acquired socket. */ | |
495 | static void qrtr_port_put(struct qrtr_sock *ipc) | |
496 | { | |
497 | sock_put(&ipc->sk); | |
498 | } | |
499 | ||
500 | /* Remove port assignment. */ | |
501 | static void qrtr_port_remove(struct qrtr_sock *ipc) | |
502 | { | |
1a7959c7 | 503 | struct qrtr_ctrl_pkt *pkt; |
1784473b | 504 | struct sk_buff *skb; |
bdabad3e | 505 | int port = ipc->us.sq_port; |
e7044482 BA |
506 | struct sockaddr_qrtr to; |
507 | ||
508 | to.sq_family = AF_QIPCRTR; | |
509 | to.sq_node = QRTR_NODE_BCAST; | |
510 | to.sq_port = QRTR_PORT_CTRL; | |
bdabad3e | 511 | |
1a7959c7 | 512 | skb = qrtr_alloc_ctrl_packet(&pkt); |
1784473b | 513 | if (skb) { |
1a7959c7 BA |
514 | pkt->cmd = cpu_to_le32(QRTR_TYPE_DEL_CLIENT); |
515 | pkt->client.node = cpu_to_le32(ipc->us.sq_node); | |
516 | pkt->client.port = cpu_to_le32(ipc->us.sq_port); | |
517 | ||
1784473b | 518 | skb_set_owner_w(skb, &ipc->sk); |
e7044482 BA |
519 | qrtr_bcast_enqueue(NULL, skb, QRTR_TYPE_DEL_CLIENT, &ipc->us, |
520 | &to); | |
1784473b BA |
521 | } |
522 | ||
bdabad3e CC |
523 | if (port == QRTR_PORT_CTRL) |
524 | port = 0; | |
525 | ||
526 | __sock_put(&ipc->sk); | |
527 | ||
528 | mutex_lock(&qrtr_port_lock); | |
529 | idr_remove(&qrtr_ports, port); | |
530 | mutex_unlock(&qrtr_port_lock); | |
531 | } | |
532 | ||
533 | /* Assign port number to socket. | |
534 | * | |
535 | * Specify port in the integer pointed to by port, and it will be adjusted | |
536 | * on return as necesssary. | |
537 | * | |
538 | * Port may be: | |
539 | * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET] | |
540 | * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN | |
541 | * >QRTR_MIN_EPH_SOCKET: Specified; available to all | |
542 | */ | |
543 | static int qrtr_port_assign(struct qrtr_sock *ipc, int *port) | |
544 | { | |
545 | int rc; | |
546 | ||
547 | mutex_lock(&qrtr_port_lock); | |
548 | if (!*port) { | |
549 | rc = idr_alloc(&qrtr_ports, ipc, | |
550 | QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1, | |
551 | GFP_ATOMIC); | |
552 | if (rc >= 0) | |
553 | *port = rc; | |
554 | } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) { | |
555 | rc = -EACCES; | |
556 | } else if (*port == QRTR_PORT_CTRL) { | |
557 | rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC); | |
558 | } else { | |
559 | rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC); | |
560 | if (rc >= 0) | |
561 | *port = rc; | |
562 | } | |
563 | mutex_unlock(&qrtr_port_lock); | |
564 | ||
565 | if (rc == -ENOSPC) | |
566 | return -EADDRINUSE; | |
567 | else if (rc < 0) | |
568 | return rc; | |
569 | ||
570 | sock_hold(&ipc->sk); | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
b24844b1 BA |
575 | /* Reset all non-control ports */ |
576 | static void qrtr_reset_ports(void) | |
577 | { | |
578 | struct qrtr_sock *ipc; | |
579 | int id; | |
580 | ||
581 | mutex_lock(&qrtr_port_lock); | |
582 | idr_for_each_entry(&qrtr_ports, ipc, id) { | |
583 | /* Don't reset control port */ | |
584 | if (id == 0) | |
585 | continue; | |
586 | ||
587 | sock_hold(&ipc->sk); | |
588 | ipc->sk.sk_err = ENETRESET; | |
ae85bfa8 | 589 | ipc->sk.sk_error_report(&ipc->sk); |
b24844b1 BA |
590 | sock_put(&ipc->sk); |
591 | } | |
592 | mutex_unlock(&qrtr_port_lock); | |
593 | } | |
594 | ||
bdabad3e CC |
595 | /* Bind socket to address. |
596 | * | |
597 | * Socket should be locked upon call. | |
598 | */ | |
599 | static int __qrtr_bind(struct socket *sock, | |
600 | const struct sockaddr_qrtr *addr, int zapped) | |
601 | { | |
602 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
603 | struct sock *sk = sock->sk; | |
604 | int port; | |
605 | int rc; | |
606 | ||
607 | /* rebinding ok */ | |
608 | if (!zapped && addr->sq_port == ipc->us.sq_port) | |
609 | return 0; | |
610 | ||
611 | port = addr->sq_port; | |
612 | rc = qrtr_port_assign(ipc, &port); | |
613 | if (rc) | |
614 | return rc; | |
615 | ||
616 | /* unbind previous, if any */ | |
617 | if (!zapped) | |
618 | qrtr_port_remove(ipc); | |
619 | ipc->us.sq_port = port; | |
620 | ||
621 | sock_reset_flag(sk, SOCK_ZAPPED); | |
622 | ||
b24844b1 BA |
623 | /* Notify all open ports about the new controller */ |
624 | if (port == QRTR_PORT_CTRL) | |
625 | qrtr_reset_ports(); | |
626 | ||
bdabad3e CC |
627 | return 0; |
628 | } | |
629 | ||
630 | /* Auto bind to an ephemeral port. */ | |
631 | static int qrtr_autobind(struct socket *sock) | |
632 | { | |
633 | struct sock *sk = sock->sk; | |
634 | struct sockaddr_qrtr addr; | |
635 | ||
636 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
637 | return 0; | |
638 | ||
639 | addr.sq_family = AF_QIPCRTR; | |
640 | addr.sq_node = qrtr_local_nid; | |
641 | addr.sq_port = 0; | |
642 | ||
643 | return __qrtr_bind(sock, &addr, 1); | |
644 | } | |
645 | ||
646 | /* Bind socket to specified sockaddr. */ | |
647 | static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
648 | { | |
649 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
650 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
651 | struct sock *sk = sock->sk; | |
652 | int rc; | |
653 | ||
654 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
655 | return -EINVAL; | |
656 | ||
657 | if (addr->sq_node != ipc->us.sq_node) | |
658 | return -EINVAL; | |
659 | ||
660 | lock_sock(sk); | |
661 | rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED)); | |
662 | release_sock(sk); | |
663 | ||
664 | return rc; | |
665 | } | |
666 | ||
667 | /* Queue packet to local peer socket. */ | |
e7044482 BA |
668 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
669 | int type, struct sockaddr_qrtr *from, | |
670 | struct sockaddr_qrtr *to) | |
bdabad3e | 671 | { |
bdabad3e | 672 | struct qrtr_sock *ipc; |
f507a9b6 | 673 | struct qrtr_cb *cb; |
bdabad3e | 674 | |
e7044482 | 675 | ipc = qrtr_port_lookup(to->sq_port); |
bdabad3e CC |
676 | if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */ |
677 | kfree_skb(skb); | |
678 | return -ENODEV; | |
679 | } | |
680 | ||
f507a9b6 BA |
681 | cb = (struct qrtr_cb *)skb->cb; |
682 | cb->src_node = from->sq_node; | |
683 | cb->src_port = from->sq_port; | |
e7044482 | 684 | |
bdabad3e CC |
685 | if (sock_queue_rcv_skb(&ipc->sk, skb)) { |
686 | qrtr_port_put(ipc); | |
687 | kfree_skb(skb); | |
688 | return -ENOSPC; | |
689 | } | |
690 | ||
691 | qrtr_port_put(ipc); | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | /* Queue packet for broadcast. */ | |
e7044482 BA |
697 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
698 | int type, struct sockaddr_qrtr *from, | |
699 | struct sockaddr_qrtr *to) | |
bdabad3e CC |
700 | { |
701 | struct sk_buff *skbn; | |
702 | ||
703 | mutex_lock(&qrtr_node_lock); | |
704 | list_for_each_entry(node, &qrtr_all_nodes, item) { | |
705 | skbn = skb_clone(skb, GFP_KERNEL); | |
706 | if (!skbn) | |
707 | break; | |
708 | skb_set_owner_w(skbn, skb->sk); | |
e7044482 | 709 | qrtr_node_enqueue(node, skbn, type, from, to); |
bdabad3e CC |
710 | } |
711 | mutex_unlock(&qrtr_node_lock); | |
712 | ||
e7044482 | 713 | qrtr_local_enqueue(node, skb, type, from, to); |
bdabad3e CC |
714 | |
715 | return 0; | |
716 | } | |
717 | ||
718 | static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) | |
719 | { | |
720 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
e7044482 BA |
721 | int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *, int, |
722 | struct sockaddr_qrtr *, struct sockaddr_qrtr *); | |
8f5e2451 | 723 | __le32 qrtr_type = cpu_to_le32(QRTR_TYPE_DATA); |
bdabad3e CC |
724 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); |
725 | struct sock *sk = sock->sk; | |
726 | struct qrtr_node *node; | |
bdabad3e CC |
727 | struct sk_buff *skb; |
728 | size_t plen; | |
7036e621 | 729 | u32 type; |
bdabad3e CC |
730 | int rc; |
731 | ||
732 | if (msg->msg_flags & ~(MSG_DONTWAIT)) | |
733 | return -EINVAL; | |
734 | ||
735 | if (len > 65535) | |
736 | return -EMSGSIZE; | |
737 | ||
738 | lock_sock(sk); | |
739 | ||
740 | if (addr) { | |
741 | if (msg->msg_namelen < sizeof(*addr)) { | |
742 | release_sock(sk); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
746 | if (addr->sq_family != AF_QIPCRTR) { | |
747 | release_sock(sk); | |
748 | return -EINVAL; | |
749 | } | |
750 | ||
751 | rc = qrtr_autobind(sock); | |
752 | if (rc) { | |
753 | release_sock(sk); | |
754 | return rc; | |
755 | } | |
756 | } else if (sk->sk_state == TCP_ESTABLISHED) { | |
757 | addr = &ipc->peer; | |
758 | } else { | |
759 | release_sock(sk); | |
760 | return -ENOTCONN; | |
761 | } | |
762 | ||
763 | node = NULL; | |
764 | if (addr->sq_node == QRTR_NODE_BCAST) { | |
765 | enqueue_fn = qrtr_bcast_enqueue; | |
fdf5fd39 AKN |
766 | if (addr->sq_port != QRTR_PORT_CTRL) { |
767 | release_sock(sk); | |
768 | return -ENOTCONN; | |
769 | } | |
bdabad3e CC |
770 | } else if (addr->sq_node == ipc->us.sq_node) { |
771 | enqueue_fn = qrtr_local_enqueue; | |
772 | } else { | |
773 | enqueue_fn = qrtr_node_enqueue; | |
774 | node = qrtr_node_lookup(addr->sq_node); | |
775 | if (!node) { | |
776 | release_sock(sk); | |
777 | return -ECONNRESET; | |
778 | } | |
779 | } | |
780 | ||
781 | plen = (len + 3) & ~3; | |
194ccc88 | 782 | skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE, |
bdabad3e CC |
783 | msg->msg_flags & MSG_DONTWAIT, &rc); |
784 | if (!skb) | |
785 | goto out_node; | |
786 | ||
194ccc88 | 787 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
bdabad3e | 788 | |
e7044482 | 789 | rc = memcpy_from_msg(skb_put(skb, len), msg, len); |
bdabad3e CC |
790 | if (rc) { |
791 | kfree_skb(skb); | |
792 | goto out_node; | |
793 | } | |
794 | ||
bdabad3e CC |
795 | if (ipc->us.sq_port == QRTR_PORT_CTRL) { |
796 | if (len < 4) { | |
797 | rc = -EINVAL; | |
798 | kfree_skb(skb); | |
799 | goto out_node; | |
800 | } | |
801 | ||
802 | /* control messages already require the type as 'command' */ | |
8f5e2451 | 803 | skb_copy_bits(skb, 0, &qrtr_type, 4); |
bdabad3e CC |
804 | } |
805 | ||
7036e621 | 806 | type = le32_to_cpu(qrtr_type); |
e7044482 | 807 | rc = enqueue_fn(node, skb, type, &ipc->us, addr); |
bdabad3e CC |
808 | if (rc >= 0) |
809 | rc = len; | |
810 | ||
811 | out_node: | |
812 | qrtr_node_release(node); | |
813 | release_sock(sk); | |
814 | ||
815 | return rc; | |
816 | } | |
817 | ||
818 | static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, | |
819 | size_t size, int flags) | |
820 | { | |
821 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
bdabad3e CC |
822 | struct sock *sk = sock->sk; |
823 | struct sk_buff *skb; | |
f507a9b6 | 824 | struct qrtr_cb *cb; |
bdabad3e CC |
825 | int copied, rc; |
826 | ||
827 | lock_sock(sk); | |
828 | ||
829 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
830 | release_sock(sk); | |
831 | return -EADDRNOTAVAIL; | |
832 | } | |
833 | ||
834 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
835 | flags & MSG_DONTWAIT, &rc); | |
836 | if (!skb) { | |
837 | release_sock(sk); | |
838 | return rc; | |
839 | } | |
840 | ||
f507a9b6 | 841 | copied = skb->len; |
bdabad3e CC |
842 | if (copied > size) { |
843 | copied = size; | |
844 | msg->msg_flags |= MSG_TRUNC; | |
845 | } | |
846 | ||
f507a9b6 | 847 | rc = skb_copy_datagram_msg(skb, 0, msg, copied); |
bdabad3e CC |
848 | if (rc < 0) |
849 | goto out; | |
850 | rc = copied; | |
851 | ||
852 | if (addr) { | |
f507a9b6 | 853 | cb = (struct qrtr_cb *)skb->cb; |
bdabad3e | 854 | addr->sq_family = AF_QIPCRTR; |
f507a9b6 BA |
855 | addr->sq_node = cb->src_node; |
856 | addr->sq_port = cb->src_port; | |
bdabad3e CC |
857 | msg->msg_namelen = sizeof(*addr); |
858 | } | |
859 | ||
860 | out: | |
861 | skb_free_datagram(sk, skb); | |
862 | release_sock(sk); | |
863 | ||
864 | return rc; | |
865 | } | |
866 | ||
867 | static int qrtr_connect(struct socket *sock, struct sockaddr *saddr, | |
868 | int len, int flags) | |
869 | { | |
870 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
871 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
872 | struct sock *sk = sock->sk; | |
873 | int rc; | |
874 | ||
875 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
876 | return -EINVAL; | |
877 | ||
878 | lock_sock(sk); | |
879 | ||
880 | sk->sk_state = TCP_CLOSE; | |
881 | sock->state = SS_UNCONNECTED; | |
882 | ||
883 | rc = qrtr_autobind(sock); | |
884 | if (rc) { | |
885 | release_sock(sk); | |
886 | return rc; | |
887 | } | |
888 | ||
889 | ipc->peer = *addr; | |
890 | sock->state = SS_CONNECTED; | |
891 | sk->sk_state = TCP_ESTABLISHED; | |
892 | ||
893 | release_sock(sk); | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | static int qrtr_getname(struct socket *sock, struct sockaddr *saddr, | |
9b2c45d4 | 899 | int peer) |
bdabad3e CC |
900 | { |
901 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
902 | struct sockaddr_qrtr qaddr; | |
903 | struct sock *sk = sock->sk; | |
904 | ||
905 | lock_sock(sk); | |
906 | if (peer) { | |
907 | if (sk->sk_state != TCP_ESTABLISHED) { | |
908 | release_sock(sk); | |
909 | return -ENOTCONN; | |
910 | } | |
911 | ||
912 | qaddr = ipc->peer; | |
913 | } else { | |
914 | qaddr = ipc->us; | |
915 | } | |
916 | release_sock(sk); | |
917 | ||
bdabad3e CC |
918 | qaddr.sq_family = AF_QIPCRTR; |
919 | ||
920 | memcpy(saddr, &qaddr, sizeof(qaddr)); | |
921 | ||
9b2c45d4 | 922 | return sizeof(qaddr); |
bdabad3e CC |
923 | } |
924 | ||
925 | static int qrtr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
926 | { | |
927 | void __user *argp = (void __user *)arg; | |
928 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
929 | struct sock *sk = sock->sk; | |
930 | struct sockaddr_qrtr *sq; | |
931 | struct sk_buff *skb; | |
932 | struct ifreq ifr; | |
933 | long len = 0; | |
934 | int rc = 0; | |
935 | ||
936 | lock_sock(sk); | |
937 | ||
938 | switch (cmd) { | |
939 | case TIOCOUTQ: | |
940 | len = sk->sk_sndbuf - sk_wmem_alloc_get(sk); | |
941 | if (len < 0) | |
942 | len = 0; | |
943 | rc = put_user(len, (int __user *)argp); | |
944 | break; | |
945 | case TIOCINQ: | |
946 | skb = skb_peek(&sk->sk_receive_queue); | |
947 | if (skb) | |
f507a9b6 | 948 | len = skb->len; |
bdabad3e CC |
949 | rc = put_user(len, (int __user *)argp); |
950 | break; | |
951 | case SIOCGIFADDR: | |
952 | if (copy_from_user(&ifr, argp, sizeof(ifr))) { | |
953 | rc = -EFAULT; | |
954 | break; | |
955 | } | |
956 | ||
957 | sq = (struct sockaddr_qrtr *)&ifr.ifr_addr; | |
958 | *sq = ipc->us; | |
959 | if (copy_to_user(argp, &ifr, sizeof(ifr))) { | |
960 | rc = -EFAULT; | |
961 | break; | |
962 | } | |
963 | break; | |
bdabad3e CC |
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, | |
c7cbdbf2 | 1026 | .gettstamp = sock_gettstamp, |
a11e1d43 | 1027 | .poll = datagram_poll, |
bdabad3e CC |
1028 | .shutdown = sock_no_shutdown, |
1029 | .setsockopt = sock_no_setsockopt, | |
1030 | .getsockopt = sock_no_getsockopt, | |
1031 | .release = qrtr_release, | |
1032 | .mmap = sock_no_mmap, | |
1033 | .sendpage = sock_no_sendpage, | |
1034 | }; | |
1035 | ||
1036 | static struct proto qrtr_proto = { | |
1037 | .name = "QIPCRTR", | |
1038 | .owner = THIS_MODULE, | |
1039 | .obj_size = sizeof(struct qrtr_sock), | |
1040 | }; | |
1041 | ||
1042 | static int qrtr_create(struct net *net, struct socket *sock, | |
1043 | int protocol, int kern) | |
1044 | { | |
1045 | struct qrtr_sock *ipc; | |
1046 | struct sock *sk; | |
1047 | ||
1048 | if (sock->type != SOCK_DGRAM) | |
1049 | return -EPROTOTYPE; | |
1050 | ||
1051 | sk = sk_alloc(net, AF_QIPCRTR, GFP_KERNEL, &qrtr_proto, kern); | |
1052 | if (!sk) | |
1053 | return -ENOMEM; | |
1054 | ||
1055 | sock_set_flag(sk, SOCK_ZAPPED); | |
1056 | ||
1057 | sock_init_data(sock, sk); | |
1058 | sock->ops = &qrtr_proto_ops; | |
1059 | ||
1060 | ipc = qrtr_sk(sk); | |
1061 | ipc->us.sq_family = AF_QIPCRTR; | |
1062 | ipc->us.sq_node = qrtr_local_nid; | |
1063 | ipc->us.sq_port = 0; | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | static const struct nla_policy qrtr_policy[IFA_MAX + 1] = { | |
1069 | [IFA_LOCAL] = { .type = NLA_U32 }, | |
1070 | }; | |
1071 | ||
c21ef3e3 DA |
1072 | static int qrtr_addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, |
1073 | struct netlink_ext_ack *extack) | |
bdabad3e CC |
1074 | { |
1075 | struct nlattr *tb[IFA_MAX + 1]; | |
1076 | struct ifaddrmsg *ifm; | |
1077 | int rc; | |
1078 | ||
1079 | if (!netlink_capable(skb, CAP_NET_ADMIN)) | |
1080 | return -EPERM; | |
1081 | ||
1082 | if (!netlink_capable(skb, CAP_SYS_ADMIN)) | |
1083 | return -EPERM; | |
1084 | ||
1085 | ASSERT_RTNL(); | |
1086 | ||
8cb08174 JB |
1087 | rc = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
1088 | qrtr_policy, extack); | |
bdabad3e CC |
1089 | if (rc < 0) |
1090 | return rc; | |
1091 | ||
1092 | ifm = nlmsg_data(nlh); | |
1093 | if (!tb[IFA_LOCAL]) | |
1094 | return -EINVAL; | |
1095 | ||
1096 | qrtr_local_nid = nla_get_u32(tb[IFA_LOCAL]); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | static const struct net_proto_family qrtr_family = { | |
1101 | .owner = THIS_MODULE, | |
1102 | .family = AF_QIPCRTR, | |
1103 | .create = qrtr_create, | |
1104 | }; | |
1105 | ||
1106 | static int __init qrtr_proto_init(void) | |
1107 | { | |
1108 | int rc; | |
1109 | ||
1110 | rc = proto_register(&qrtr_proto, 1); | |
1111 | if (rc) | |
1112 | return rc; | |
1113 | ||
1114 | rc = sock_register(&qrtr_family); | |
1115 | if (rc) { | |
1116 | proto_unregister(&qrtr_proto); | |
1117 | return rc; | |
1118 | } | |
1119 | ||
c1c502b5 FW |
1120 | rc = rtnl_register_module(THIS_MODULE, PF_QIPCRTR, RTM_NEWADDR, qrtr_addr_doit, NULL, 0); |
1121 | if (rc) { | |
1122 | sock_unregister(qrtr_family.family); | |
1123 | proto_unregister(&qrtr_proto); | |
1124 | } | |
bdabad3e | 1125 | |
c1c502b5 | 1126 | return rc; |
bdabad3e | 1127 | } |
b7e732fa | 1128 | postcore_initcall(qrtr_proto_init); |
bdabad3e CC |
1129 | |
1130 | static void __exit qrtr_proto_fini(void) | |
1131 | { | |
1132 | rtnl_unregister(PF_QIPCRTR, RTM_NEWADDR); | |
1133 | sock_unregister(qrtr_family.family); | |
1134 | proto_unregister(&qrtr_proto); | |
1135 | } | |
1136 | module_exit(qrtr_proto_fini); | |
1137 | ||
1138 | MODULE_DESCRIPTION("Qualcomm IPC-router driver"); | |
1139 | MODULE_LICENSE("GPL v2"); | |
77ac725e | 1140 | MODULE_ALIAS_NETPROTO(PF_QIPCRTR); |