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Merge tag 'mfd-fixes-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
[linux-2.6-block.git] / drivers / infiniband / core / iwpm_msg.c
CommitLineData
30dc5e63
TN		 1/*
2 * Copyright (c) 2014 Intel Corporation. All rights reserved.
3 * Copyright (c) 2014 Chelsio, Inc. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#include "iwpm_util.h"
35
ec04847c 36static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
30dc5e63
TN		 37static int iwpm_ulib_version = 3;
38static int iwpm_user_pid = IWPM_PID_UNDEFINED;
39static atomic_t echo_nlmsg_seq;
40
41int iwpm_valid_pid(void)
42{
43 return iwpm_user_pid > 0;
44}
45EXPORT_SYMBOL(iwpm_valid_pid);
46
47/*
48 * iwpm_register_pid - Send a netlink query to user space
49 * for the iwarp port mapper pid
50 *
51 * nlmsg attributes:
52 * [IWPM_NLA_REG_PID_SEQ]
53 * [IWPM_NLA_REG_IF_NAME]
54 * [IWPM_NLA_REG_IBDEV_NAME]
55 * [IWPM_NLA_REG_ULIB_NAME]
56 */
57int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
58{
59 struct sk_buff *skb = NULL;
60 struct iwpm_nlmsg_request *nlmsg_request = NULL;
61 struct nlmsghdr *nlh;
62 u32 msg_seq;
63 const char *err_str = "";
64 int ret = -EINVAL;
65
66 if (!iwpm_valid_client(nl_client)) {
67 err_str = "Invalid port mapper client";
68 goto pid_query_error;
69 }
a7f2f24c
TN		 70 if (iwpm_check_registration(nl_client, IWPM_REG_VALID) ||
71 iwpm_user_pid == IWPM_PID_UNAVAILABLE)
30dc5e63
TN		 72 return 0;
73 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client);
74 if (!skb) {
75 err_str = "Unable to create a nlmsg";
76 goto pid_query_error;
77 }
78 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
79 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
80 if (!nlmsg_request) {
81 err_str = "Unable to allocate netlink request";
82 goto pid_query_error;
83 }
84 msg_seq = atomic_read(&echo_nlmsg_seq);
85
86 /* fill in the pid request message */
87 err_str = "Unable to put attribute of the nlmsg";
88 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ);
89 if (ret)
90 goto pid_query_error;
b493d91d 91 ret = ibnl_put_attr(skb, nlh, IFNAMSIZ,
dafb5587 92 pm_msg->if_name, IWPM_NLA_REG_IF_NAME);
30dc5e63
TN		 93 if (ret)
94 goto pid_query_error;
95 ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE,
96 pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME);
97 if (ret)
98 goto pid_query_error;
99 ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE,
100 (char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME);
101 if (ret)
102 goto pid_query_error;
103
104 pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n",
105 __func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name);
106
107 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
108 if (ret) {
109 skb = NULL; /* skb is freed in the netlink send-op handling */
30dc5e63
TN		 110 iwpm_user_pid = IWPM_PID_UNAVAILABLE;
111 err_str = "Unable to send a nlmsg";
112 goto pid_query_error;
113 }
114 nlmsg_request->req_buffer = pm_msg;
115 ret = iwpm_wait_complete_req(nlmsg_request);
116 return ret;
117pid_query_error:
118 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
119 if (skb)
120 dev_kfree_skb(skb);
121 if (nlmsg_request)
122 iwpm_free_nlmsg_request(&nlmsg_request->kref);
123 return ret;
124}
125EXPORT_SYMBOL(iwpm_register_pid);
126
127/*
128 * iwpm_add_mapping - Send a netlink add mapping message
129 * to the port mapper
130 * nlmsg attributes:
131 * [IWPM_NLA_MANAGE_MAPPING_SEQ]
132 * [IWPM_NLA_MANAGE_ADDR]
133 */
134int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
135{
136 struct sk_buff *skb = NULL;
137 struct iwpm_nlmsg_request *nlmsg_request = NULL;
138 struct nlmsghdr *nlh;
139 u32 msg_seq;
140 const char *err_str = "";
141 int ret = -EINVAL;
142
143 if (!iwpm_valid_client(nl_client)) {
144 err_str = "Invalid port mapper client";
145 goto add_mapping_error;
146 }
a7f2f24c
TN		 147 if (!iwpm_valid_pid())
148 return 0;
149 if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
30dc5e63
TN		 150 err_str = "Unregistered port mapper client";
151 goto add_mapping_error;
152 }
30dc5e63
TN		 153 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client);
154 if (!skb) {
155 err_str = "Unable to create a nlmsg";
156 goto add_mapping_error;
157 }
158 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
159 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
160 if (!nlmsg_request) {
161 err_str = "Unable to allocate netlink request";
162 goto add_mapping_error;
163 }
164 msg_seq = atomic_read(&echo_nlmsg_seq);
165 /* fill in the add mapping message */
166 err_str = "Unable to put attribute of the nlmsg";
167 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
168 IWPM_NLA_MANAGE_MAPPING_SEQ);
169 if (ret)
170 goto add_mapping_error;
171 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
172 &pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR);
173 if (ret)
174 goto add_mapping_error;
175 nlmsg_request->req_buffer = pm_msg;
176
177 ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
178 if (ret) {
179 skb = NULL; /* skb is freed in the netlink send-op handling */
180 iwpm_user_pid = IWPM_PID_UNDEFINED;
181 err_str = "Unable to send a nlmsg";
182 goto add_mapping_error;
183 }
184 ret = iwpm_wait_complete_req(nlmsg_request);
185 return ret;
186add_mapping_error:
187 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
188 if (skb)
189 dev_kfree_skb(skb);
190 if (nlmsg_request)
191 iwpm_free_nlmsg_request(&nlmsg_request->kref);
192 return ret;
193}
194EXPORT_SYMBOL(iwpm_add_mapping);
195
196/*
197 * iwpm_add_and_query_mapping - Send a netlink add and query
198 * mapping message to the port mapper
199 * nlmsg attributes:
200 * [IWPM_NLA_QUERY_MAPPING_SEQ]
201 * [IWPM_NLA_QUERY_LOCAL_ADDR]
202 * [IWPM_NLA_QUERY_REMOTE_ADDR]
203 */
204int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
205{
206 struct sk_buff *skb = NULL;
207 struct iwpm_nlmsg_request *nlmsg_request = NULL;
208 struct nlmsghdr *nlh;
209 u32 msg_seq;
210 const char *err_str = "";
211 int ret = -EINVAL;
212
213 if (!iwpm_valid_client(nl_client)) {
214 err_str = "Invalid port mapper client";
215 goto query_mapping_error;
216 }
a7f2f24c
TN		 217 if (!iwpm_valid_pid())
218 return 0;
219 if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
30dc5e63
TN		 220 err_str = "Unregistered port mapper client";
221 goto query_mapping_error;
222 }
30dc5e63
TN		 223 ret = -ENOMEM;
224 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client);
225 if (!skb) {
226 err_str = "Unable to create a nlmsg";
227 goto query_mapping_error;
228 }
229 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
230 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq,
231 nl_client, GFP_KERNEL);
232 if (!nlmsg_request) {
233 err_str = "Unable to allocate netlink request";
234 goto query_mapping_error;
235 }
236 msg_seq = atomic_read(&echo_nlmsg_seq);
237
238 /* fill in the query message */
239 err_str = "Unable to put attribute of the nlmsg";
240 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
241 IWPM_NLA_QUERY_MAPPING_SEQ);
242 if (ret)
243 goto query_mapping_error;
244 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
245 &pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR);
246 if (ret)
247 goto query_mapping_error;
248 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
249 &pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR);
250 if (ret)
251 goto query_mapping_error;
252 nlmsg_request->req_buffer = pm_msg;
253
254 ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
255 if (ret) {
256 skb = NULL; /* skb is freed in the netlink send-op handling */
257 err_str = "Unable to send a nlmsg";
258 goto query_mapping_error;
259 }
260 ret = iwpm_wait_complete_req(nlmsg_request);
261 return ret;
262query_mapping_error:
263 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
264 if (skb)
265 dev_kfree_skb(skb);
266 if (nlmsg_request)
267 iwpm_free_nlmsg_request(&nlmsg_request->kref);
268 return ret;
269}
270EXPORT_SYMBOL(iwpm_add_and_query_mapping);
271
272/*
273 * iwpm_remove_mapping - Send a netlink remove mapping message
274 * to the port mapper
275 * nlmsg attributes:
276 * [IWPM_NLA_MANAGE_MAPPING_SEQ]
277 * [IWPM_NLA_MANAGE_ADDR]
278 */
279int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
280{
281 struct sk_buff *skb = NULL;
282 struct nlmsghdr *nlh;
283 u32 msg_seq;
284 const char *err_str = "";
285 int ret = -EINVAL;
286
287 if (!iwpm_valid_client(nl_client)) {
288 err_str = "Invalid port mapper client";
289 goto remove_mapping_error;
290 }
a7f2f24c
TN		 291 if (!iwpm_valid_pid())
292 return 0;
293 if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
30dc5e63
TN		 294 err_str = "Unregistered port mapper client";
295 goto remove_mapping_error;
296 }
30dc5e63
TN		 297 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client);
298 if (!skb) {
299 ret = -ENOMEM;
300 err_str = "Unable to create a nlmsg";
301 goto remove_mapping_error;
302 }
303 msg_seq = atomic_read(&echo_nlmsg_seq);
304 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
305 err_str = "Unable to put attribute of the nlmsg";
306 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
307 IWPM_NLA_MANAGE_MAPPING_SEQ);
308 if (ret)
309 goto remove_mapping_error;
310 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
311 local_addr, IWPM_NLA_MANAGE_ADDR);
312 if (ret)
313 goto remove_mapping_error;
314
315 ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
316 if (ret) {
317 skb = NULL; /* skb is freed in the netlink send-op handling */
318 iwpm_user_pid = IWPM_PID_UNDEFINED;
319 err_str = "Unable to send a nlmsg";
320 goto remove_mapping_error;
321 }
322 iwpm_print_sockaddr(local_addr,
323 "remove_mapping: Local sockaddr:");
324 return 0;
325remove_mapping_error:
326 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
327 if (skb)
328 dev_kfree_skb_any(skb);
329 return ret;
330}
331EXPORT_SYMBOL(iwpm_remove_mapping);
332
333/* netlink attribute policy for the received response to register pid request */
334static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = {
335 [IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 },
336 [IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING,
337 .len = IWPM_DEVNAME_SIZE - 1 },
338 [IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING,
339 .len = IWPM_ULIBNAME_SIZE - 1 },
340 [IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 },
341 [IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 }
342};
343
344/*
345 * iwpm_register_pid_cb - Process a port mapper response to
346 * iwpm_register_pid()
347 */
348int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
349{
350 struct iwpm_nlmsg_request *nlmsg_request = NULL;
351 struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX];
352 struct iwpm_dev_data *pm_msg;
353 char *dev_name, *iwpm_name;
354 u32 msg_seq;
355 u8 nl_client;
356 u16 iwpm_version;
357 const char *msg_type = "Register Pid response";
358
359 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX,
360 resp_reg_policy, nltb, msg_type))
361 return -EINVAL;
362
363 msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_SEQ]);
364 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
365 if (!nlmsg_request) {
366 pr_info("%s: Could not find a matching request (seq = %u)\n",
367 __func__, msg_seq);
368 return -EINVAL;
369 }
370 pm_msg = nlmsg_request->req_buffer;
371 nl_client = nlmsg_request->nl_client;
372 dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]);
373 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]);
374 iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]);
375
376 /* check device name, ulib name and version */
377 if (strcmp(pm_msg->dev_name, dev_name) ||
378 strcmp(iwpm_ulib_name, iwpm_name) ||
379 iwpm_version != iwpm_ulib_version) {
380
381 pr_info("%s: Incorrect info (dev = %s name = %s version = %d)\n",
382 __func__, dev_name, iwpm_name, iwpm_version);
383 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
384 goto register_pid_response_exit;
385 }
386 iwpm_user_pid = cb->nlh->nlmsg_pid;
387 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
388 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
389 __func__, iwpm_user_pid);
390 if (iwpm_valid_client(nl_client))
a7f2f24c 391 iwpm_set_registration(nl_client, IWPM_REG_VALID);
30dc5e63
TN		 392register_pid_response_exit:
393 nlmsg_request->request_done = 1;
394 /* always for found nlmsg_request */
395 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
396 barrier();
dafb5587 397 up(&nlmsg_request->sem);
30dc5e63
TN		 398 return 0;
399}
400EXPORT_SYMBOL(iwpm_register_pid_cb);
401
402/* netlink attribute policy for the received response to add mapping request */
403static const struct nla_policy resp_add_policy[IWPM_NLA_RMANAGE_MAPPING_MAX] = {
404 [IWPM_NLA_MANAGE_MAPPING_SEQ] = { .type = NLA_U32 },
405 [IWPM_NLA_MANAGE_ADDR] = { .len = sizeof(struct sockaddr_storage) },
406 [IWPM_NLA_MANAGE_MAPPED_LOC_ADDR] = { .len = sizeof(struct sockaddr_storage) },
407 [IWPM_NLA_RMANAGE_MAPPING_ERR] = { .type = NLA_U16 }
408};
409
410/*
411 * iwpm_add_mapping_cb - Process a port mapper response to
412 * iwpm_add_mapping()
413 */
414int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
415{
416 struct iwpm_sa_data *pm_msg;
417 struct iwpm_nlmsg_request *nlmsg_request = NULL;
418 struct nlattr *nltb[IWPM_NLA_RMANAGE_MAPPING_MAX];
419 struct sockaddr_storage *local_sockaddr;
420 struct sockaddr_storage *mapped_sockaddr;
421 const char *msg_type;
422 u32 msg_seq;
423
424 msg_type = "Add Mapping response";
425 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RMANAGE_MAPPING_MAX,
426 resp_add_policy, nltb, msg_type))
427 return -EINVAL;
428
429 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
430
431 msg_seq = nla_get_u32(nltb[IWPM_NLA_MANAGE_MAPPING_SEQ]);
432 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
433 if (!nlmsg_request) {
434 pr_info("%s: Could not find a matching request (seq = %u)\n",
435 __func__, msg_seq);
436 return -EINVAL;
437 }
438 pm_msg = nlmsg_request->req_buffer;
439 local_sockaddr = (struct sockaddr_storage *)
440 nla_data(nltb[IWPM_NLA_MANAGE_ADDR]);
441 mapped_sockaddr = (struct sockaddr_storage *)
442 nla_data(nltb[IWPM_NLA_MANAGE_MAPPED_LOC_ADDR]);
443
444 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) {
445 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
446 goto add_mapping_response_exit;
447 }
448 if (mapped_sockaddr->ss_family != local_sockaddr->ss_family) {
449 pr_info("%s: Sockaddr family doesn't match the requested one\n",
450 __func__);
451 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
452 goto add_mapping_response_exit;
453 }
454 memcpy(&pm_msg->mapped_loc_addr, mapped_sockaddr,
455 sizeof(*mapped_sockaddr));
456 iwpm_print_sockaddr(&pm_msg->loc_addr,
457 "add_mapping: Local sockaddr:");
458 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
459 "add_mapping: Mapped local sockaddr:");
460
461add_mapping_response_exit:
462 nlmsg_request->request_done = 1;
463 /* always for found request */
464 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
465 barrier();
dafb5587 466 up(&nlmsg_request->sem);
30dc5e63
TN		 467 return 0;
468}
469EXPORT_SYMBOL(iwpm_add_mapping_cb);
470
6eec1774
TN		 471/* netlink attribute policy for the response to add and query mapping request
472 * and response with remote address info */
30dc5e63
TN		 473static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = {
474 [IWPM_NLA_QUERY_MAPPING_SEQ] = { .type = NLA_U32 },
475 [IWPM_NLA_QUERY_LOCAL_ADDR] = { .len = sizeof(struct sockaddr_storage) },
476 [IWPM_NLA_QUERY_REMOTE_ADDR] = { .len = sizeof(struct sockaddr_storage) },
477 [IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = { .len = sizeof(struct sockaddr_storage) },
478 [IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = { .len = sizeof(struct sockaddr_storage) },
479 [IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 }
480};
481
482/*
483 * iwpm_add_and_query_mapping_cb - Process a port mapper response to
484 * iwpm_add_and_query_mapping()
485 */
486int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
487 struct netlink_callback *cb)
488{
489 struct iwpm_sa_data *pm_msg;
490 struct iwpm_nlmsg_request *nlmsg_request = NULL;
491 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
492 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
493 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
494 const char *msg_type;
495 u32 msg_seq;
496 u16 err_code;
497
498 msg_type = "Query Mapping response";
499 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
500 resp_query_policy, nltb, msg_type))
501 return -EINVAL;
502 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
503
504 msg_seq = nla_get_u32(nltb[IWPM_NLA_QUERY_MAPPING_SEQ]);
505 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
506 if (!nlmsg_request) {
507 pr_info("%s: Could not find a matching request (seq = %u)\n",
508 __func__, msg_seq);
0270be78 509 return -EINVAL;
30dc5e63
TN		 510 }
511 pm_msg = nlmsg_request->req_buffer;
512 local_sockaddr = (struct sockaddr_storage *)
513 nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]);
514 remote_sockaddr = (struct sockaddr_storage *)
515 nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]);
516 mapped_loc_sockaddr = (struct sockaddr_storage *)
517 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
518 mapped_rem_sockaddr = (struct sockaddr_storage *)
519 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
520
521 err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]);
522 if (err_code == IWPM_REMOTE_QUERY_REJECT) {
523 pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n",
524 __func__, cb->nlh->nlmsg_pid, msg_seq);
525 nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT;
526 }
527 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) ||
528 iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) {
529 pr_info("%s: Incorrect local sockaddr\n", __func__);
530 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
531 goto query_mapping_response_exit;
532 }
533 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
534 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
535 pr_info("%s: Sockaddr family doesn't match the requested one\n",
536 __func__);
537 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
538 goto query_mapping_response_exit;
539 }
540 memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr,
541 sizeof(*mapped_loc_sockaddr));
542 memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr,
543 sizeof(*mapped_rem_sockaddr));
544
545 iwpm_print_sockaddr(&pm_msg->loc_addr,
546 "query_mapping: Local sockaddr:");
547 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
548 "query_mapping: Mapped local sockaddr:");
549 iwpm_print_sockaddr(&pm_msg->rem_addr,
550 "query_mapping: Remote sockaddr:");
551 iwpm_print_sockaddr(&pm_msg->mapped_rem_addr,
552 "query_mapping: Mapped remote sockaddr:");
553query_mapping_response_exit:
554 nlmsg_request->request_done = 1;
555 /* always for found request */
556 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
557 barrier();
dafb5587 558 up(&nlmsg_request->sem);
30dc5e63
TN		 559 return 0;
560}
561EXPORT_SYMBOL(iwpm_add_and_query_mapping_cb);
562
6eec1774
TN		 563/*
564 * iwpm_remote_info_cb - Process a port mapper message, containing
565 * the remote connecting peer address info
566 */
567int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
568{
569 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
570 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
571 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
572 struct iwpm_remote_info *rem_info;
573 const char *msg_type;
574 u8 nl_client;
575 int ret = -EINVAL;
576
577 msg_type = "Remote Mapping info";
578 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
579 resp_query_policy, nltb, msg_type))
580 return ret;
581
582 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
583 if (!iwpm_valid_client(nl_client)) {
584 pr_info("%s: Invalid port mapper client = %d\n",
585 __func__, nl_client);
586 return ret;
587 }
588 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
589
590 local_sockaddr = (struct sockaddr_storage *)
591 nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]);
592 remote_sockaddr = (struct sockaddr_storage *)
593 nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]);
594 mapped_loc_sockaddr = (struct sockaddr_storage *)
595 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
596 mapped_rem_sockaddr = (struct sockaddr_storage *)
597 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
598
599 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
600 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
601 pr_info("%s: Sockaddr family doesn't match the requested one\n",
602 __func__);
603 return ret;
604 }
605 rem_info = kzalloc(sizeof(struct iwpm_remote_info), GFP_ATOMIC);
606 if (!rem_info) {
607 pr_err("%s: Unable to allocate a remote info\n", __func__);
608 ret = -ENOMEM;
609 return ret;
610 }
611 memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr,
612 sizeof(struct sockaddr_storage));
613 memcpy(&rem_info->remote_sockaddr, remote_sockaddr,
614 sizeof(struct sockaddr_storage));
615 memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr,
616 sizeof(struct sockaddr_storage));
617 rem_info->nl_client = nl_client;
618
619 iwpm_add_remote_info(rem_info);
620
621 iwpm_print_sockaddr(local_sockaddr,
622 "remote_info: Local sockaddr:");
623 iwpm_print_sockaddr(mapped_loc_sockaddr,
624 "remote_info: Mapped local sockaddr:");
625 iwpm_print_sockaddr(remote_sockaddr,
626 "remote_info: Remote sockaddr:");
627 iwpm_print_sockaddr(mapped_rem_sockaddr,
628 "remote_info: Mapped remote sockaddr:");
629 return ret;
630}
631EXPORT_SYMBOL(iwpm_remote_info_cb);
632
30dc5e63
TN		 633/* netlink attribute policy for the received request for mapping info */
634static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
635 [IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING,
636 .len = IWPM_ULIBNAME_SIZE - 1 },
637 [IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 }
638};
639
640/*
641 * iwpm_mapping_info_cb - Process a port mapper request for mapping info
642 */
643int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
644{
645 struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX];
646 const char *msg_type = "Mapping Info response";
30dc5e63
TN		 647 u8 nl_client;
648 char *iwpm_name;
649 u16 iwpm_version;
650 int ret = -EINVAL;
651
652 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX,
653 resp_mapinfo_policy, nltb, msg_type)) {
654 pr_info("%s: Unable to parse nlmsg\n", __func__);
655 return ret;
656 }
657 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]);
658 iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]);
659 if (strcmp(iwpm_ulib_name, iwpm_name) ||
660 iwpm_version != iwpm_ulib_version) {
661 pr_info("%s: Invalid port mapper name = %s version = %d\n",
662 __func__, iwpm_name, iwpm_version);
663 return ret;
664 }
665 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
666 if (!iwpm_valid_client(nl_client)) {
667 pr_info("%s: Invalid port mapper client = %d\n",
668 __func__, nl_client);
669 return ret;
670 }
a7f2f24c 671 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
30dc5e63 672 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
a7f2f24c 673 iwpm_user_pid = cb->nlh->nlmsg_pid;
30dc5e63
TN		 674 if (!iwpm_mapinfo_available())
675 return 0;
30dc5e63 676 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
a7f2f24c
TN		 677 __func__, iwpm_user_pid);
678 ret = iwpm_send_mapinfo(nl_client, iwpm_user_pid);
30dc5e63
TN		 679 return ret;
680}
681EXPORT_SYMBOL(iwpm_mapping_info_cb);
682
683/* netlink attribute policy for the received mapping info ack */
684static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = {
685 [IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 },
686 [IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 },
687 [IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 }
688};
689
690/*
691 * iwpm_ack_mapping_info_cb - Process a port mapper ack for
692 * the provided mapping info records
693 */
694int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
695{
696 struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX];
697 u32 mapinfo_send, mapinfo_ack;
698 const char *msg_type = "Mapping Info Ack";
699
700 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX,
701 ack_mapinfo_policy, nltb, msg_type))
702 return -EINVAL;
703 mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]);
704 mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]);
705 if (mapinfo_ack != mapinfo_send)
706 pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n",
707 __func__, mapinfo_send, mapinfo_ack);
708 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
709 return 0;
710}
711EXPORT_SYMBOL(iwpm_ack_mapping_info_cb);
712
713/* netlink attribute policy for the received port mapper error message */
714static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = {
715 [IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 },
716 [IWPM_NLA_ERR_CODE] = { .type = NLA_U16 },
717};
718
719/*
720 * iwpm_mapping_error_cb - Process a port mapper error message
721 */
722int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
723{
724 struct iwpm_nlmsg_request *nlmsg_request = NULL;
725 int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
726 struct nlattr *nltb[IWPM_NLA_ERR_MAX];
727 u32 msg_seq;
728 u16 err_code;
729 const char *msg_type = "Mapping Error Msg";
730
731 if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX,
732 map_error_policy, nltb, msg_type))
733 return -EINVAL;
734
735 msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]);
736 err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]);
737 pr_info("%s: Received msg seq = %u err code = %u client = %d\n",
738 __func__, msg_seq, err_code, nl_client);
739 /* look for nlmsg_request */
740 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
741 if (!nlmsg_request) {
742 /* not all errors have associated requests */
743 pr_debug("Could not find matching req (seq = %u)\n", msg_seq);
744 return 0;
745 }
746 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
747 nlmsg_request->err_code = err_code;
748 nlmsg_request->request_done = 1;
749 /* always for found request */
750 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
751 barrier();
dafb5587 752 up(&nlmsg_request->sem);
30dc5e63
TN		 753 return 0;
754}
755EXPORT_SYMBOL(iwpm_mapping_error_cb);
Linux 6.x block layer and io_uring tree(s)