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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 | ||
73f0c11d | 153 | cancel_work_sync(&node->work); |
bdabad3e CC |
154 | skb_queue_purge(&node->rx_queue); |
155 | kfree(node); | |
156 | } | |
157 | ||
158 | /* Increment reference to node. */ | |
159 | static struct qrtr_node *qrtr_node_acquire(struct qrtr_node *node) | |
160 | { | |
161 | if (node) | |
162 | kref_get(&node->ref); | |
163 | return node; | |
164 | } | |
165 | ||
166 | /* Decrement reference to node and release as necessary. */ | |
167 | static void qrtr_node_release(struct qrtr_node *node) | |
168 | { | |
169 | if (!node) | |
170 | return; | |
171 | kref_put_mutex(&node->ref, __qrtr_node_release, &qrtr_node_lock); | |
172 | } | |
173 | ||
174 | /* Pass an outgoing packet socket buffer to the endpoint driver. */ | |
e7044482 BA |
175 | static int qrtr_node_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
176 | int type, struct sockaddr_qrtr *from, | |
177 | struct sockaddr_qrtr *to) | |
bdabad3e | 178 | { |
194ccc88 | 179 | struct qrtr_hdr_v1 *hdr; |
e7044482 | 180 | size_t len = skb->len; |
bdabad3e CC |
181 | int rc = -ENODEV; |
182 | ||
194ccc88 BA |
183 | hdr = skb_push(skb, sizeof(*hdr)); |
184 | hdr->version = cpu_to_le32(QRTR_PROTO_VER_1); | |
e7044482 BA |
185 | hdr->type = cpu_to_le32(type); |
186 | hdr->src_node_id = cpu_to_le32(from->sq_node); | |
187 | hdr->src_port_id = cpu_to_le32(from->sq_port); | |
d27e77a3 AKN |
188 | if (to->sq_port == QRTR_PORT_CTRL) { |
189 | hdr->dst_node_id = cpu_to_le32(node->nid); | |
190 | hdr->dst_port_id = cpu_to_le32(QRTR_NODE_BCAST); | |
191 | } else { | |
192 | hdr->dst_node_id = cpu_to_le32(to->sq_node); | |
193 | hdr->dst_port_id = cpu_to_le32(to->sq_port); | |
194 | } | |
e7044482 BA |
195 | |
196 | hdr->size = cpu_to_le32(len); | |
197 | hdr->confirm_rx = 0; | |
198 | ||
ce57785b | 199 | skb_put_padto(skb, ALIGN(len, 4) + sizeof(*hdr)); |
e7044482 | 200 | |
bdabad3e CC |
201 | mutex_lock(&node->ep_lock); |
202 | if (node->ep) | |
203 | rc = node->ep->xmit(node->ep, skb); | |
204 | else | |
205 | kfree_skb(skb); | |
206 | mutex_unlock(&node->ep_lock); | |
207 | ||
208 | return rc; | |
209 | } | |
210 | ||
211 | /* Lookup node by id. | |
212 | * | |
213 | * callers must release with qrtr_node_release() | |
214 | */ | |
215 | static struct qrtr_node *qrtr_node_lookup(unsigned int nid) | |
216 | { | |
217 | struct qrtr_node *node; | |
218 | ||
219 | mutex_lock(&qrtr_node_lock); | |
220 | node = radix_tree_lookup(&qrtr_nodes, nid); | |
221 | node = qrtr_node_acquire(node); | |
222 | mutex_unlock(&qrtr_node_lock); | |
223 | ||
224 | return node; | |
225 | } | |
226 | ||
227 | /* Assign node id to node. | |
228 | * | |
229 | * This is mostly useful for automatic node id assignment, based on | |
230 | * the source id in the incoming packet. | |
231 | */ | |
232 | static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid) | |
233 | { | |
234 | if (node->nid != QRTR_EP_NID_AUTO || nid == QRTR_EP_NID_AUTO) | |
235 | return; | |
236 | ||
237 | mutex_lock(&qrtr_node_lock); | |
238 | radix_tree_insert(&qrtr_nodes, nid, node); | |
239 | node->nid = nid; | |
240 | mutex_unlock(&qrtr_node_lock); | |
241 | } | |
242 | ||
243 | /** | |
244 | * qrtr_endpoint_post() - post incoming data | |
245 | * @ep: endpoint handle | |
246 | * @data: data pointer | |
247 | * @len: size of data in bytes | |
248 | * | |
249 | * Return: 0 on success; negative error code on failure | |
250 | */ | |
251 | int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len) | |
252 | { | |
253 | struct qrtr_node *node = ep->node; | |
194ccc88 BA |
254 | const struct qrtr_hdr_v1 *v1; |
255 | const struct qrtr_hdr_v2 *v2; | |
bdabad3e | 256 | struct sk_buff *skb; |
f507a9b6 | 257 | struct qrtr_cb *cb; |
bdabad3e | 258 | unsigned int size; |
bdabad3e | 259 | unsigned int ver; |
194ccc88 | 260 | size_t hdrlen; |
bdabad3e | 261 | |
194ccc88 | 262 | if (len & 3) |
bdabad3e CC |
263 | return -EINVAL; |
264 | ||
265 | skb = netdev_alloc_skb(NULL, len); | |
266 | if (!skb) | |
267 | return -ENOMEM; | |
268 | ||
f507a9b6 | 269 | cb = (struct qrtr_cb *)skb->cb; |
f507a9b6 | 270 | |
194ccc88 BA |
271 | /* Version field in v1 is little endian, so this works for both cases */ |
272 | ver = *(u8*)data; | |
273 | ||
274 | switch (ver) { | |
275 | case QRTR_PROTO_VER_1: | |
276 | v1 = data; | |
277 | hdrlen = sizeof(*v1); | |
278 | ||
279 | cb->type = le32_to_cpu(v1->type); | |
280 | cb->src_node = le32_to_cpu(v1->src_node_id); | |
281 | cb->src_port = le32_to_cpu(v1->src_port_id); | |
282 | cb->confirm_rx = !!v1->confirm_rx; | |
283 | cb->dst_node = le32_to_cpu(v1->dst_node_id); | |
284 | cb->dst_port = le32_to_cpu(v1->dst_port_id); | |
285 | ||
286 | size = le32_to_cpu(v1->size); | |
287 | break; | |
288 | case QRTR_PROTO_VER_2: | |
289 | v2 = data; | |
290 | hdrlen = sizeof(*v2) + v2->optlen; | |
291 | ||
292 | cb->type = v2->type; | |
293 | cb->confirm_rx = !!(v2->flags & QRTR_FLAGS_CONFIRM_RX); | |
294 | cb->src_node = le16_to_cpu(v2->src_node_id); | |
295 | cb->src_port = le16_to_cpu(v2->src_port_id); | |
296 | cb->dst_node = le16_to_cpu(v2->dst_node_id); | |
297 | cb->dst_port = le16_to_cpu(v2->dst_port_id); | |
298 | ||
299 | if (cb->src_port == (u16)QRTR_PORT_CTRL) | |
300 | cb->src_port = QRTR_PORT_CTRL; | |
301 | if (cb->dst_port == (u16)QRTR_PORT_CTRL) | |
302 | cb->dst_port = QRTR_PORT_CTRL; | |
303 | ||
304 | size = le32_to_cpu(v2->size); | |
305 | break; | |
306 | default: | |
307 | pr_err("qrtr: Invalid version %d\n", ver); | |
308 | goto err; | |
309 | } | |
310 | ||
311 | if (len != ALIGN(size, 4) + hdrlen) | |
312 | goto err; | |
313 | ||
314 | if (cb->dst_port != QRTR_PORT_CTRL && cb->type != QRTR_TYPE_DATA) | |
315 | goto err; | |
316 | ||
317 | skb_put_data(skb, data + hdrlen, size); | |
bdabad3e CC |
318 | |
319 | skb_queue_tail(&node->rx_queue, skb); | |
320 | schedule_work(&node->work); | |
321 | ||
322 | return 0; | |
194ccc88 BA |
323 | |
324 | err: | |
325 | kfree_skb(skb); | |
326 | return -EINVAL; | |
327 | ||
bdabad3e CC |
328 | } |
329 | EXPORT_SYMBOL_GPL(qrtr_endpoint_post); | |
330 | ||
1a7959c7 BA |
331 | /** |
332 | * qrtr_alloc_ctrl_packet() - allocate control packet skb | |
333 | * @pkt: reference to qrtr_ctrl_pkt pointer | |
334 | * | |
335 | * Returns newly allocated sk_buff, or NULL on failure | |
336 | * | |
337 | * This function allocates a sk_buff large enough to carry a qrtr_ctrl_pkt and | |
338 | * on success returns a reference to the control packet in @pkt. | |
339 | */ | |
340 | static struct sk_buff *qrtr_alloc_ctrl_packet(struct qrtr_ctrl_pkt **pkt) | |
bdabad3e | 341 | { |
1a7959c7 | 342 | const int pkt_len = sizeof(struct qrtr_ctrl_pkt); |
bdabad3e | 343 | struct sk_buff *skb; |
bdabad3e | 344 | |
194ccc88 | 345 | skb = alloc_skb(QRTR_HDR_MAX_SIZE + pkt_len, GFP_KERNEL); |
bdabad3e CC |
346 | if (!skb) |
347 | return NULL; | |
bdabad3e | 348 | |
194ccc88 | 349 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
1a7959c7 | 350 | *pkt = skb_put_zero(skb, pkt_len); |
1784473b BA |
351 | |
352 | return skb; | |
353 | } | |
354 | ||
bdabad3e CC |
355 | static struct qrtr_sock *qrtr_port_lookup(int port); |
356 | static void qrtr_port_put(struct qrtr_sock *ipc); | |
357 | ||
358 | /* Handle and route a received packet. | |
359 | * | |
360 | * This will auto-reply with resume-tx packet as necessary. | |
361 | */ | |
362 | static void qrtr_node_rx_work(struct work_struct *work) | |
363 | { | |
364 | struct qrtr_node *node = container_of(work, struct qrtr_node, work); | |
365 | struct sk_buff *skb; | |
366 | ||
367 | while ((skb = skb_dequeue(&node->rx_queue)) != NULL) { | |
bdabad3e | 368 | struct qrtr_sock *ipc; |
cb6530b9 | 369 | struct qrtr_cb *cb = (struct qrtr_cb *)skb->cb; |
bdabad3e | 370 | |
f507a9b6 | 371 | qrtr_node_assign(node, cb->src_node); |
e7044482 | 372 | |
f507a9b6 | 373 | ipc = qrtr_port_lookup(cb->dst_port); |
bdabad3e CC |
374 | if (!ipc) { |
375 | kfree_skb(skb); | |
376 | } else { | |
377 | if (sock_queue_rcv_skb(&ipc->sk, skb)) | |
378 | kfree_skb(skb); | |
379 | ||
380 | qrtr_port_put(ipc); | |
381 | } | |
bdabad3e CC |
382 | } |
383 | } | |
384 | ||
385 | /** | |
386 | * qrtr_endpoint_register() - register a new endpoint | |
387 | * @ep: endpoint to register | |
388 | * @nid: desired node id; may be QRTR_EP_NID_AUTO for auto-assignment | |
389 | * Return: 0 on success; negative error code on failure | |
390 | * | |
391 | * The specified endpoint must have the xmit function pointer set on call. | |
392 | */ | |
393 | int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid) | |
394 | { | |
395 | struct qrtr_node *node; | |
396 | ||
397 | if (!ep || !ep->xmit) | |
398 | return -EINVAL; | |
399 | ||
400 | node = kzalloc(sizeof(*node), GFP_KERNEL); | |
401 | if (!node) | |
402 | return -ENOMEM; | |
403 | ||
404 | INIT_WORK(&node->work, qrtr_node_rx_work); | |
405 | kref_init(&node->ref); | |
406 | mutex_init(&node->ep_lock); | |
407 | skb_queue_head_init(&node->rx_queue); | |
408 | node->nid = QRTR_EP_NID_AUTO; | |
409 | node->ep = ep; | |
410 | ||
411 | qrtr_node_assign(node, nid); | |
412 | ||
413 | mutex_lock(&qrtr_node_lock); | |
414 | list_add(&node->item, &qrtr_all_nodes); | |
415 | mutex_unlock(&qrtr_node_lock); | |
416 | ep->node = node; | |
417 | ||
418 | return 0; | |
419 | } | |
420 | EXPORT_SYMBOL_GPL(qrtr_endpoint_register); | |
421 | ||
422 | /** | |
423 | * qrtr_endpoint_unregister - unregister endpoint | |
424 | * @ep: endpoint to unregister | |
425 | */ | |
426 | void qrtr_endpoint_unregister(struct qrtr_endpoint *ep) | |
427 | { | |
428 | struct qrtr_node *node = ep->node; | |
e7044482 BA |
429 | struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL}; |
430 | struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL}; | |
1a7959c7 | 431 | struct qrtr_ctrl_pkt *pkt; |
8acc8ee4 | 432 | struct sk_buff *skb; |
bdabad3e CC |
433 | |
434 | mutex_lock(&node->ep_lock); | |
435 | node->ep = NULL; | |
436 | mutex_unlock(&node->ep_lock); | |
437 | ||
8acc8ee4 | 438 | /* Notify the local controller about the event */ |
1a7959c7 BA |
439 | skb = qrtr_alloc_ctrl_packet(&pkt); |
440 | if (skb) { | |
441 | pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE); | |
e7044482 | 442 | qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst); |
1a7959c7 | 443 | } |
8acc8ee4 | 444 | |
bdabad3e CC |
445 | qrtr_node_release(node); |
446 | ep->node = NULL; | |
447 | } | |
448 | EXPORT_SYMBOL_GPL(qrtr_endpoint_unregister); | |
449 | ||
450 | /* Lookup socket by port. | |
451 | * | |
452 | * Callers must release with qrtr_port_put() | |
453 | */ | |
454 | static struct qrtr_sock *qrtr_port_lookup(int port) | |
455 | { | |
456 | struct qrtr_sock *ipc; | |
457 | ||
458 | if (port == QRTR_PORT_CTRL) | |
459 | port = 0; | |
460 | ||
461 | mutex_lock(&qrtr_port_lock); | |
462 | ipc = idr_find(&qrtr_ports, port); | |
463 | if (ipc) | |
464 | sock_hold(&ipc->sk); | |
465 | mutex_unlock(&qrtr_port_lock); | |
466 | ||
467 | return ipc; | |
468 | } | |
469 | ||
470 | /* Release acquired socket. */ | |
471 | static void qrtr_port_put(struct qrtr_sock *ipc) | |
472 | { | |
473 | sock_put(&ipc->sk); | |
474 | } | |
475 | ||
476 | /* Remove port assignment. */ | |
477 | static void qrtr_port_remove(struct qrtr_sock *ipc) | |
478 | { | |
1a7959c7 | 479 | struct qrtr_ctrl_pkt *pkt; |
1784473b | 480 | struct sk_buff *skb; |
bdabad3e | 481 | int port = ipc->us.sq_port; |
e7044482 BA |
482 | struct sockaddr_qrtr to; |
483 | ||
484 | to.sq_family = AF_QIPCRTR; | |
485 | to.sq_node = QRTR_NODE_BCAST; | |
486 | to.sq_port = QRTR_PORT_CTRL; | |
bdabad3e | 487 | |
1a7959c7 | 488 | skb = qrtr_alloc_ctrl_packet(&pkt); |
1784473b | 489 | if (skb) { |
1a7959c7 BA |
490 | pkt->cmd = cpu_to_le32(QRTR_TYPE_DEL_CLIENT); |
491 | pkt->client.node = cpu_to_le32(ipc->us.sq_node); | |
492 | pkt->client.port = cpu_to_le32(ipc->us.sq_port); | |
493 | ||
1784473b | 494 | skb_set_owner_w(skb, &ipc->sk); |
e7044482 BA |
495 | qrtr_bcast_enqueue(NULL, skb, QRTR_TYPE_DEL_CLIENT, &ipc->us, |
496 | &to); | |
1784473b BA |
497 | } |
498 | ||
bdabad3e CC |
499 | if (port == QRTR_PORT_CTRL) |
500 | port = 0; | |
501 | ||
502 | __sock_put(&ipc->sk); | |
503 | ||
504 | mutex_lock(&qrtr_port_lock); | |
505 | idr_remove(&qrtr_ports, port); | |
506 | mutex_unlock(&qrtr_port_lock); | |
507 | } | |
508 | ||
509 | /* Assign port number to socket. | |
510 | * | |
511 | * Specify port in the integer pointed to by port, and it will be adjusted | |
512 | * on return as necesssary. | |
513 | * | |
514 | * Port may be: | |
515 | * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET] | |
516 | * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN | |
517 | * >QRTR_MIN_EPH_SOCKET: Specified; available to all | |
518 | */ | |
519 | static int qrtr_port_assign(struct qrtr_sock *ipc, int *port) | |
520 | { | |
521 | int rc; | |
522 | ||
523 | mutex_lock(&qrtr_port_lock); | |
524 | if (!*port) { | |
525 | rc = idr_alloc(&qrtr_ports, ipc, | |
526 | QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET + 1, | |
527 | GFP_ATOMIC); | |
528 | if (rc >= 0) | |
529 | *port = rc; | |
530 | } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) { | |
531 | rc = -EACCES; | |
532 | } else if (*port == QRTR_PORT_CTRL) { | |
533 | rc = idr_alloc(&qrtr_ports, ipc, 0, 1, GFP_ATOMIC); | |
534 | } else { | |
535 | rc = idr_alloc(&qrtr_ports, ipc, *port, *port + 1, GFP_ATOMIC); | |
536 | if (rc >= 0) | |
537 | *port = rc; | |
538 | } | |
539 | mutex_unlock(&qrtr_port_lock); | |
540 | ||
541 | if (rc == -ENOSPC) | |
542 | return -EADDRINUSE; | |
543 | else if (rc < 0) | |
544 | return rc; | |
545 | ||
546 | sock_hold(&ipc->sk); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
b24844b1 BA |
551 | /* Reset all non-control ports */ |
552 | static void qrtr_reset_ports(void) | |
553 | { | |
554 | struct qrtr_sock *ipc; | |
555 | int id; | |
556 | ||
557 | mutex_lock(&qrtr_port_lock); | |
558 | idr_for_each_entry(&qrtr_ports, ipc, id) { | |
559 | /* Don't reset control port */ | |
560 | if (id == 0) | |
561 | continue; | |
562 | ||
563 | sock_hold(&ipc->sk); | |
564 | ipc->sk.sk_err = ENETRESET; | |
ae85bfa8 | 565 | ipc->sk.sk_error_report(&ipc->sk); |
b24844b1 BA |
566 | sock_put(&ipc->sk); |
567 | } | |
568 | mutex_unlock(&qrtr_port_lock); | |
569 | } | |
570 | ||
bdabad3e CC |
571 | /* Bind socket to address. |
572 | * | |
573 | * Socket should be locked upon call. | |
574 | */ | |
575 | static int __qrtr_bind(struct socket *sock, | |
576 | const struct sockaddr_qrtr *addr, int zapped) | |
577 | { | |
578 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
579 | struct sock *sk = sock->sk; | |
580 | int port; | |
581 | int rc; | |
582 | ||
583 | /* rebinding ok */ | |
584 | if (!zapped && addr->sq_port == ipc->us.sq_port) | |
585 | return 0; | |
586 | ||
587 | port = addr->sq_port; | |
588 | rc = qrtr_port_assign(ipc, &port); | |
589 | if (rc) | |
590 | return rc; | |
591 | ||
592 | /* unbind previous, if any */ | |
593 | if (!zapped) | |
594 | qrtr_port_remove(ipc); | |
595 | ipc->us.sq_port = port; | |
596 | ||
597 | sock_reset_flag(sk, SOCK_ZAPPED); | |
598 | ||
b24844b1 BA |
599 | /* Notify all open ports about the new controller */ |
600 | if (port == QRTR_PORT_CTRL) | |
601 | qrtr_reset_ports(); | |
602 | ||
bdabad3e CC |
603 | return 0; |
604 | } | |
605 | ||
606 | /* Auto bind to an ephemeral port. */ | |
607 | static int qrtr_autobind(struct socket *sock) | |
608 | { | |
609 | struct sock *sk = sock->sk; | |
610 | struct sockaddr_qrtr addr; | |
611 | ||
612 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
613 | return 0; | |
614 | ||
615 | addr.sq_family = AF_QIPCRTR; | |
616 | addr.sq_node = qrtr_local_nid; | |
617 | addr.sq_port = 0; | |
618 | ||
619 | return __qrtr_bind(sock, &addr, 1); | |
620 | } | |
621 | ||
622 | /* Bind socket to specified sockaddr. */ | |
623 | static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len) | |
624 | { | |
625 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr); | |
626 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); | |
627 | struct sock *sk = sock->sk; | |
628 | int rc; | |
629 | ||
630 | if (len < sizeof(*addr) || addr->sq_family != AF_QIPCRTR) | |
631 | return -EINVAL; | |
632 | ||
633 | if (addr->sq_node != ipc->us.sq_node) | |
634 | return -EINVAL; | |
635 | ||
636 | lock_sock(sk); | |
637 | rc = __qrtr_bind(sock, addr, sock_flag(sk, SOCK_ZAPPED)); | |
638 | release_sock(sk); | |
639 | ||
640 | return rc; | |
641 | } | |
642 | ||
643 | /* Queue packet to local peer socket. */ | |
e7044482 BA |
644 | static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
645 | int type, struct sockaddr_qrtr *from, | |
646 | struct sockaddr_qrtr *to) | |
bdabad3e | 647 | { |
bdabad3e | 648 | struct qrtr_sock *ipc; |
f507a9b6 | 649 | struct qrtr_cb *cb; |
bdabad3e | 650 | |
e7044482 | 651 | ipc = qrtr_port_lookup(to->sq_port); |
bdabad3e CC |
652 | if (!ipc || &ipc->sk == skb->sk) { /* do not send to self */ |
653 | kfree_skb(skb); | |
654 | return -ENODEV; | |
655 | } | |
656 | ||
f507a9b6 BA |
657 | cb = (struct qrtr_cb *)skb->cb; |
658 | cb->src_node = from->sq_node; | |
659 | cb->src_port = from->sq_port; | |
e7044482 | 660 | |
bdabad3e CC |
661 | if (sock_queue_rcv_skb(&ipc->sk, skb)) { |
662 | qrtr_port_put(ipc); | |
663 | kfree_skb(skb); | |
664 | return -ENOSPC; | |
665 | } | |
666 | ||
667 | qrtr_port_put(ipc); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | /* Queue packet for broadcast. */ | |
e7044482 BA |
673 | static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb, |
674 | int type, struct sockaddr_qrtr *from, | |
675 | struct sockaddr_qrtr *to) | |
bdabad3e CC |
676 | { |
677 | struct sk_buff *skbn; | |
678 | ||
679 | mutex_lock(&qrtr_node_lock); | |
680 | list_for_each_entry(node, &qrtr_all_nodes, item) { | |
681 | skbn = skb_clone(skb, GFP_KERNEL); | |
682 | if (!skbn) | |
683 | break; | |
684 | skb_set_owner_w(skbn, skb->sk); | |
e7044482 | 685 | qrtr_node_enqueue(node, skbn, type, from, to); |
bdabad3e CC |
686 | } |
687 | mutex_unlock(&qrtr_node_lock); | |
688 | ||
e7044482 | 689 | qrtr_local_enqueue(node, skb, type, from, to); |
bdabad3e CC |
690 | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) | |
695 | { | |
696 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
e7044482 BA |
697 | int (*enqueue_fn)(struct qrtr_node *, struct sk_buff *, int, |
698 | struct sockaddr_qrtr *, struct sockaddr_qrtr *); | |
8f5e2451 | 699 | __le32 qrtr_type = cpu_to_le32(QRTR_TYPE_DATA); |
bdabad3e CC |
700 | struct qrtr_sock *ipc = qrtr_sk(sock->sk); |
701 | struct sock *sk = sock->sk; | |
702 | struct qrtr_node *node; | |
bdabad3e CC |
703 | struct sk_buff *skb; |
704 | size_t plen; | |
7036e621 | 705 | u32 type; |
bdabad3e CC |
706 | int rc; |
707 | ||
708 | if (msg->msg_flags & ~(MSG_DONTWAIT)) | |
709 | return -EINVAL; | |
710 | ||
711 | if (len > 65535) | |
712 | return -EMSGSIZE; | |
713 | ||
714 | lock_sock(sk); | |
715 | ||
716 | if (addr) { | |
717 | if (msg->msg_namelen < sizeof(*addr)) { | |
718 | release_sock(sk); | |
719 | return -EINVAL; | |
720 | } | |
721 | ||
722 | if (addr->sq_family != AF_QIPCRTR) { | |
723 | release_sock(sk); | |
724 | return -EINVAL; | |
725 | } | |
726 | ||
727 | rc = qrtr_autobind(sock); | |
728 | if (rc) { | |
729 | release_sock(sk); | |
730 | return rc; | |
731 | } | |
732 | } else if (sk->sk_state == TCP_ESTABLISHED) { | |
733 | addr = &ipc->peer; | |
734 | } else { | |
735 | release_sock(sk); | |
736 | return -ENOTCONN; | |
737 | } | |
738 | ||
739 | node = NULL; | |
740 | if (addr->sq_node == QRTR_NODE_BCAST) { | |
741 | enqueue_fn = qrtr_bcast_enqueue; | |
fdf5fd39 AKN |
742 | if (addr->sq_port != QRTR_PORT_CTRL) { |
743 | release_sock(sk); | |
744 | return -ENOTCONN; | |
745 | } | |
bdabad3e CC |
746 | } else if (addr->sq_node == ipc->us.sq_node) { |
747 | enqueue_fn = qrtr_local_enqueue; | |
748 | } else { | |
749 | enqueue_fn = qrtr_node_enqueue; | |
750 | node = qrtr_node_lookup(addr->sq_node); | |
751 | if (!node) { | |
752 | release_sock(sk); | |
753 | return -ECONNRESET; | |
754 | } | |
755 | } | |
756 | ||
757 | plen = (len + 3) & ~3; | |
194ccc88 | 758 | skb = sock_alloc_send_skb(sk, plen + QRTR_HDR_MAX_SIZE, |
bdabad3e CC |
759 | msg->msg_flags & MSG_DONTWAIT, &rc); |
760 | if (!skb) | |
761 | goto out_node; | |
762 | ||
194ccc88 | 763 | skb_reserve(skb, QRTR_HDR_MAX_SIZE); |
bdabad3e | 764 | |
e7044482 | 765 | rc = memcpy_from_msg(skb_put(skb, len), msg, len); |
bdabad3e CC |
766 | if (rc) { |
767 | kfree_skb(skb); | |
768 | goto out_node; | |
769 | } | |
770 | ||
bdabad3e CC |
771 | if (ipc->us.sq_port == QRTR_PORT_CTRL) { |
772 | if (len < 4) { | |
773 | rc = -EINVAL; | |
774 | kfree_skb(skb); | |
775 | goto out_node; | |
776 | } | |
777 | ||
778 | /* control messages already require the type as 'command' */ | |
8f5e2451 | 779 | skb_copy_bits(skb, 0, &qrtr_type, 4); |
bdabad3e CC |
780 | } |
781 | ||
7036e621 | 782 | type = le32_to_cpu(qrtr_type); |
e7044482 | 783 | rc = enqueue_fn(node, skb, type, &ipc->us, addr); |
bdabad3e CC |
784 | if (rc >= 0) |
785 | rc = len; | |
786 | ||
787 | out_node: | |
788 | qrtr_node_release(node); | |
789 | release_sock(sk); | |
790 | ||
791 | return rc; | |
792 | } | |
793 | ||
cb6530b9 BA |
794 | static int qrtr_send_resume_tx(struct qrtr_cb *cb) |
795 | { | |
796 | struct sockaddr_qrtr remote = { AF_QIPCRTR, cb->src_node, cb->src_port }; | |
797 | struct sockaddr_qrtr local = { AF_QIPCRTR, cb->dst_node, cb->dst_port }; | |
798 | struct qrtr_ctrl_pkt *pkt; | |
799 | struct qrtr_node *node; | |
800 | struct sk_buff *skb; | |
801 | int ret; | |
802 | ||
803 | node = qrtr_node_lookup(remote.sq_node); | |
804 | if (!node) | |
805 | return -EINVAL; | |
806 | ||
807 | skb = qrtr_alloc_ctrl_packet(&pkt); | |
808 | if (!skb) | |
809 | return -ENOMEM; | |
810 | ||
811 | pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX); | |
812 | pkt->client.node = cpu_to_le32(cb->dst_node); | |
813 | pkt->client.port = cpu_to_le32(cb->dst_port); | |
814 | ||
815 | ret = qrtr_node_enqueue(node, skb, QRTR_TYPE_RESUME_TX, &local, &remote); | |
816 | ||
817 | qrtr_node_release(node); | |
818 | ||
819 | return ret; | |
820 | } | |
821 | ||
bdabad3e CC |
822 | static int qrtr_recvmsg(struct socket *sock, struct msghdr *msg, |
823 | size_t size, int flags) | |
824 | { | |
825 | DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, msg->msg_name); | |
bdabad3e CC |
826 | struct sock *sk = sock->sk; |
827 | struct sk_buff *skb; | |
f507a9b6 | 828 | struct qrtr_cb *cb; |
bdabad3e CC |
829 | int copied, rc; |
830 | ||
831 | lock_sock(sk); | |
832 | ||
833 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
834 | release_sock(sk); | |
835 | return -EADDRNOTAVAIL; | |
836 | } | |
837 | ||
838 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
839 | flags & MSG_DONTWAIT, &rc); | |
840 | if (!skb) { | |
841 | release_sock(sk); | |
842 | return rc; | |
843 | } | |
cb6530b9 | 844 | cb = (struct qrtr_cb *)skb->cb; |
bdabad3e | 845 | |
f507a9b6 | 846 | copied = skb->len; |
bdabad3e CC |
847 | if (copied > size) { |
848 | copied = size; | |
849 | msg->msg_flags |= MSG_TRUNC; | |
850 | } | |
851 | ||
f507a9b6 | 852 | rc = skb_copy_datagram_msg(skb, 0, msg, copied); |
bdabad3e CC |
853 | if (rc < 0) |
854 | goto out; | |
855 | rc = copied; | |
856 | ||
857 | if (addr) { | |
858 | addr->sq_family = AF_QIPCRTR; | |
f507a9b6 BA |
859 | addr->sq_node = cb->src_node; |
860 | addr->sq_port = cb->src_port; | |
bdabad3e CC |
861 | msg->msg_namelen = sizeof(*addr); |
862 | } | |
863 | ||
864 | out: | |
cb6530b9 BA |
865 | if (cb->confirm_rx) |
866 | qrtr_send_resume_tx(cb); | |
867 | ||
bdabad3e CC |
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); |