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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
36static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
37u16 iwpm_ulib_version = IWPM_UABI_VERSION_MIN;
38static int iwpm_user_pid = IWPM_PID_UNDEFINED;
39static atomic_t echo_nlmsg_seq;
40
41/**
42 * iwpm_valid_pid - Check if the userspace iwarp port mapper pid is valid
43 *
44 * Returns true if the pid is greater than zero, otherwise returns false
45 */
46int iwpm_valid_pid(void)
47{
48 return iwpm_user_pid > 0;
49}
50
51/**
52 * iwpm_register_pid - Send a netlink query to userspace
53 * to get the iwarp port mapper pid
54 * @pm_msg: Contains driver info to send to the userspace port mapper
55 * @nl_client: The index of the netlink client
56 *
57 * nlmsg attributes:
58 * [IWPM_NLA_REG_PID_SEQ]
59 * [IWPM_NLA_REG_IF_NAME]
60 * [IWPM_NLA_REG_IBDEV_NAME]
61 * [IWPM_NLA_REG_ULIB_NAME]
62 */
63int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
64{
65 struct sk_buff *skb = NULL;
66 struct iwpm_nlmsg_request *nlmsg_request = NULL;
67 struct nlmsghdr *nlh;
68 u32 msg_seq;
69 const char *err_str = "";
70 int ret = -EINVAL;
71
72 if (iwpm_check_registration(nl_client, IWPM_REG_VALID) ||
73 iwpm_user_pid == IWPM_PID_UNAVAILABLE)
74 return 0;
75 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client);
76 if (!skb) {
77 err_str = "Unable to create a nlmsg";
78 goto pid_query_error;
79 }
80 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
81 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
82 if (!nlmsg_request) {
83 err_str = "Unable to allocate netlink request";
84 goto pid_query_error;
85 }
86 msg_seq = atomic_read(&echo_nlmsg_seq);
87
88 /* fill in the pid request message */
89 err_str = "Unable to put attribute of the nlmsg";
90 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ);
91 if (ret)
92 goto pid_query_error;
93 ret = ibnl_put_attr(skb, nlh, IFNAMSIZ,
94 pm_msg->if_name, IWPM_NLA_REG_IF_NAME);
95 if (ret)
96 goto pid_query_error;
97 ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE,
98 pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME);
99 if (ret)
100 goto pid_query_error;
101 ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE,
102 (char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME);
103 if (ret)
104 goto pid_query_error;
105
106 nlmsg_end(skb, nlh);
107
108 pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n",
109 __func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name);
110
111 ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
112 if (ret) {
113 skb = NULL; /* skb is freed in the netlink send-op handling */
114 iwpm_user_pid = IWPM_PID_UNAVAILABLE;
115 err_str = "Unable to send a nlmsg";
116 goto pid_query_error;
117 }
118 nlmsg_request->req_buffer = pm_msg;
119 ret = iwpm_wait_complete_req(nlmsg_request);
120 return ret;
121pid_query_error:
122 pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
123 dev_kfree_skb(skb);
124 if (nlmsg_request)
125 iwpm_free_nlmsg_request(&nlmsg_request->kref);
126 return ret;
127}
128
129/**
130 * iwpm_add_mapping - Send a netlink add mapping request to
131 * the userspace port mapper
132 * @pm_msg: Contains the local ip/tcp address info to send
133 * @nl_client: The index of the netlink client
134 *
135 * nlmsg attributes:
136 * [IWPM_NLA_MANAGE_MAPPING_SEQ]
137 * [IWPM_NLA_MANAGE_ADDR]
138 * [IWPM_NLA_MANAGE_FLAGS]
139 *
140 * If the request is successful, the pm_msg stores
141 * the port mapper response (mapped address info)
142 */
143int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
144{
145 struct sk_buff *skb = NULL;
146 struct iwpm_nlmsg_request *nlmsg_request = NULL;
147 struct nlmsghdr *nlh;
148 u32 msg_seq;
149 const char *err_str = "";
150 int ret = -EINVAL;
151
152 if (!iwpm_valid_pid())
153 return 0;
154 if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
155 err_str = "Unregistered port mapper client";
156 goto add_mapping_error;
157 }
158 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client);
159 if (!skb) {
160 err_str = "Unable to create a nlmsg";
161 goto add_mapping_error;
162 }
163 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
164 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
165 if (!nlmsg_request) {
166 err_str = "Unable to allocate netlink request";
167 goto add_mapping_error;
168 }
169 msg_seq = atomic_read(&echo_nlmsg_seq);
170 /* fill in the add mapping message */
171 err_str = "Unable to put attribute of the nlmsg";
172 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
173 IWPM_NLA_MANAGE_MAPPING_SEQ);
174 if (ret)
175 goto add_mapping_error;
176 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
177 &pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR);
178 if (ret)
179 goto add_mapping_error;
180
181 /* If flags are required and we're not V4, then return a quiet error */
182 if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
183 ret = -EINVAL;
184 goto add_mapping_error_nowarn;
185 }
186 if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
187 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
188 IWPM_NLA_MANAGE_FLAGS);
189 if (ret)
190 goto add_mapping_error;
191 }
192
193 nlmsg_end(skb, nlh);
194 nlmsg_request->req_buffer = pm_msg;
195
196 ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
197 if (ret) {
198 skb = NULL; /* skb is freed in the netlink send-op handling */
199 iwpm_user_pid = IWPM_PID_UNDEFINED;
200 err_str = "Unable to send a nlmsg";
201 goto add_mapping_error;
202 }
203 ret = iwpm_wait_complete_req(nlmsg_request);
204 return ret;
205add_mapping_error:
206 pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
207add_mapping_error_nowarn:
208 dev_kfree_skb(skb);
209 if (nlmsg_request)
210 iwpm_free_nlmsg_request(&nlmsg_request->kref);
211 return ret;
212}
213
214/**
215 * iwpm_add_and_query_mapping - Process the port mapper response to
216 * iwpm_add_and_query_mapping request
217 * @pm_msg: Contains the local ip/tcp address info to send
218 * @nl_client: The index of the netlink client
219 *
220 * nlmsg attributes:
221 * [IWPM_NLA_QUERY_MAPPING_SEQ]
222 * [IWPM_NLA_QUERY_LOCAL_ADDR]
223 * [IWPM_NLA_QUERY_REMOTE_ADDR]
224 * [IWPM_NLA_QUERY_FLAGS]
225 */
226int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
227{
228 struct sk_buff *skb = NULL;
229 struct iwpm_nlmsg_request *nlmsg_request = NULL;
230 struct nlmsghdr *nlh;
231 u32 msg_seq;
232 const char *err_str = "";
233 int ret = -EINVAL;
234
235 if (!iwpm_valid_pid())
236 return 0;
237 if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
238 err_str = "Unregistered port mapper client";
239 goto query_mapping_error;
240 }
241 ret = -ENOMEM;
242 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client);
243 if (!skb) {
244 err_str = "Unable to create a nlmsg";
245 goto query_mapping_error;
246 }
247 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
248 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq,
249 nl_client, GFP_KERNEL);
250 if (!nlmsg_request) {
251 err_str = "Unable to allocate netlink request";
252 goto query_mapping_error;
253 }
254 msg_seq = atomic_read(&echo_nlmsg_seq);
255
256 /* fill in the query message */
257 err_str = "Unable to put attribute of the nlmsg";
258 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
259 IWPM_NLA_QUERY_MAPPING_SEQ);
260 if (ret)
261 goto query_mapping_error;
262 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
263 &pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR);
264 if (ret)
265 goto query_mapping_error;
266 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
267 &pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR);
268 if (ret)
269 goto query_mapping_error;
270
271 /* If flags are required and we're not V4, then return a quite error */
272 if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
273 ret = -EINVAL;
274 goto query_mapping_error_nowarn;
275 }
276 if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
277 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
278 IWPM_NLA_QUERY_FLAGS);
279 if (ret)
280 goto query_mapping_error;
281 }
282
283 nlmsg_end(skb, nlh);
284 nlmsg_request->req_buffer = pm_msg;
285
286 ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
287 if (ret) {
288 skb = NULL; /* skb is freed in the netlink send-op handling */
289 err_str = "Unable to send a nlmsg";
290 goto query_mapping_error;
291 }
292 ret = iwpm_wait_complete_req(nlmsg_request);
293 return ret;
294query_mapping_error:
295 pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
296query_mapping_error_nowarn:
297 dev_kfree_skb(skb);
298 if (nlmsg_request)
299 iwpm_free_nlmsg_request(&nlmsg_request->kref);
300 return ret;
301}
302
303/**
304 * iwpm_remove_mapping - Send a netlink remove mapping request
305 * to the userspace port mapper
306 *
307 * @local_addr: Local ip/tcp address to remove
308 * @nl_client: The index of the netlink client
309 *
310 * nlmsg attributes:
311 * [IWPM_NLA_MANAGE_MAPPING_SEQ]
312 * [IWPM_NLA_MANAGE_ADDR]
313 */
314int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
315{
316 struct sk_buff *skb = NULL;
317 struct nlmsghdr *nlh;
318 u32 msg_seq;
319 const char *err_str = "";
320 int ret = -EINVAL;
321
322 if (!iwpm_valid_pid())
323 return 0;
324 if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
325 err_str = "Unregistered port mapper client";
326 goto remove_mapping_error;
327 }
328 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client);
329 if (!skb) {
330 ret = -ENOMEM;
331 err_str = "Unable to create a nlmsg";
332 goto remove_mapping_error;
333 }
334 msg_seq = atomic_read(&echo_nlmsg_seq);
335 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
336 err_str = "Unable to put attribute of the nlmsg";
337 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
338 IWPM_NLA_MANAGE_MAPPING_SEQ);
339 if (ret)
340 goto remove_mapping_error;
341 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
342 local_addr, IWPM_NLA_MANAGE_ADDR);
343 if (ret)
344 goto remove_mapping_error;
345
346 nlmsg_end(skb, nlh);
347
348 ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
349 if (ret) {
350 skb = NULL; /* skb is freed in the netlink send-op handling */
351 iwpm_user_pid = IWPM_PID_UNDEFINED;
352 err_str = "Unable to send a nlmsg";
353 goto remove_mapping_error;
354 }
355 iwpm_print_sockaddr(local_addr,
356 "remove_mapping: Local sockaddr:");
357 return 0;
358remove_mapping_error:
359 pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
360 if (skb)
361 dev_kfree_skb_any(skb);
362 return ret;
363}
364
365/* netlink attribute policy for the received response to register pid request */
366static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = {
367 [IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 },
368 [IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING,
369 .len = IWPM_DEVNAME_SIZE - 1 },
370 [IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING,
371 .len = IWPM_ULIBNAME_SIZE - 1 },
372 [IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 },
373 [IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 }
374};
375
376/**
377 * iwpm_register_pid_cb - Process the port mapper response to
378 * iwpm_register_pid query
379 * @skb: The socket buffer
380 * @cb: Contains the received message (payload and netlink header)
381 *
382 * If successful, the function receives the userspace port mapper pid
383 * which is used in future communication with the port mapper
384 */
385int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
386{
387 struct iwpm_nlmsg_request *nlmsg_request = NULL;
388 struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX];
389 struct iwpm_dev_data *pm_msg;
390 char *dev_name, *iwpm_name;
391 u32 msg_seq;
392 u8 nl_client;
393 u16 iwpm_version;
394 const char *msg_type = "Register Pid response";
395
396 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX,
397 resp_reg_policy, nltb, msg_type))
398 return -EINVAL;
399
400 msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_SEQ]);
401 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
402 if (!nlmsg_request) {
403 pr_info("%s: Could not find a matching request (seq = %u)\n",
404 __func__, msg_seq);
405 return -EINVAL;
406 }
407 pm_msg = nlmsg_request->req_buffer;
408 nl_client = nlmsg_request->nl_client;
409 dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]);
410 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]);
411 iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]);
412
413 /* check device name, ulib name and version */
414 if (strcmp(pm_msg->dev_name, dev_name) ||
415 strcmp(iwpm_ulib_name, iwpm_name) ||
416 iwpm_version < IWPM_UABI_VERSION_MIN) {
417
418 pr_info("%s: Incorrect info (dev = %s name = %s version = %u)\n",
419 __func__, dev_name, iwpm_name, iwpm_version);
420 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
421 goto register_pid_response_exit;
422 }
423 iwpm_user_pid = cb->nlh->nlmsg_pid;
424 iwpm_ulib_version = iwpm_version;
425 if (iwpm_ulib_version < IWPM_UABI_VERSION)
426 pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
427 __func__, iwpm_user_pid);
428 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
429 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
430 __func__, iwpm_user_pid);
431 iwpm_set_registration(nl_client, IWPM_REG_VALID);
432register_pid_response_exit:
433 nlmsg_request->request_done = 1;
434 /* always for found nlmsg_request */
435 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
436 barrier();
437 up(&nlmsg_request->sem);
438 return 0;
439}
440
441/* netlink attribute policy for the received response to add mapping request */
442static const struct nla_policy resp_add_policy[IWPM_NLA_RMANAGE_MAPPING_MAX] = {
443 [IWPM_NLA_RMANAGE_MAPPING_SEQ] = { .type = NLA_U32 },
444 [IWPM_NLA_RMANAGE_ADDR] = {
445 .len = sizeof(struct sockaddr_storage) },
446 [IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR] = {
447 .len = sizeof(struct sockaddr_storage) },
448 [IWPM_NLA_RMANAGE_MAPPING_ERR] = { .type = NLA_U16 }
449};
450
451/**
452 * iwpm_add_mapping_cb - Process the port mapper response to
453 * iwpm_add_mapping request
454 * @skb: The socket buffer
455 * @cb: Contains the received message (payload and netlink header)
456 */
457int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
458{
459 struct iwpm_sa_data *pm_msg;
460 struct iwpm_nlmsg_request *nlmsg_request = NULL;
461 struct nlattr *nltb[IWPM_NLA_RMANAGE_MAPPING_MAX];
462 struct sockaddr_storage *local_sockaddr;
463 struct sockaddr_storage *mapped_sockaddr;
464 const char *msg_type;
465 u32 msg_seq;
466
467 msg_type = "Add Mapping response";
468 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RMANAGE_MAPPING_MAX,
469 resp_add_policy, nltb, msg_type))
470 return -EINVAL;
471
472 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
473
474 msg_seq = nla_get_u32(nltb[IWPM_NLA_RMANAGE_MAPPING_SEQ]);
475 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
476 if (!nlmsg_request) {
477 pr_info("%s: Could not find a matching request (seq = %u)\n",
478 __func__, msg_seq);
479 return -EINVAL;
480 }
481 pm_msg = nlmsg_request->req_buffer;
482 local_sockaddr = (struct sockaddr_storage *)
483 nla_data(nltb[IWPM_NLA_RMANAGE_ADDR]);
484 mapped_sockaddr = (struct sockaddr_storage *)
485 nla_data(nltb[IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR]);
486
487 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) {
488 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
489 goto add_mapping_response_exit;
490 }
491 if (mapped_sockaddr->ss_family != local_sockaddr->ss_family) {
492 pr_info("%s: Sockaddr family doesn't match the requested one\n",
493 __func__);
494 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
495 goto add_mapping_response_exit;
496 }
497 memcpy(&pm_msg->mapped_loc_addr, mapped_sockaddr,
498 sizeof(*mapped_sockaddr));
499 iwpm_print_sockaddr(&pm_msg->loc_addr,
500 "add_mapping: Local sockaddr:");
501 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
502 "add_mapping: Mapped local sockaddr:");
503
504add_mapping_response_exit:
505 nlmsg_request->request_done = 1;
506 /* always for found request */
507 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
508 barrier();
509 up(&nlmsg_request->sem);
510 return 0;
511}
512
513/* netlink attribute policy for the response to add and query mapping request
514 * and response with remote address info
515 */
516static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = {
517 [IWPM_NLA_RQUERY_MAPPING_SEQ] = { .type = NLA_U32 },
518 [IWPM_NLA_RQUERY_LOCAL_ADDR] = {
519 .len = sizeof(struct sockaddr_storage) },
520 [IWPM_NLA_RQUERY_REMOTE_ADDR] = {
521 .len = sizeof(struct sockaddr_storage) },
522 [IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = {
523 .len = sizeof(struct sockaddr_storage) },
524 [IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = {
525 .len = sizeof(struct sockaddr_storage) },
526 [IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 }
527};
528
529/**
530 * iwpm_add_and_query_mapping_cb - Process the port mapper response to
531 * iwpm_add_and_query_mapping request
532 * @skb: The socket buffer
533 * @cb: Contains the received message (payload and netlink header)
534 */
535int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
536 struct netlink_callback *cb)
537{
538 struct iwpm_sa_data *pm_msg;
539 struct iwpm_nlmsg_request *nlmsg_request = NULL;
540 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
541 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
542 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
543 const char *msg_type;
544 u32 msg_seq;
545 u16 err_code;
546
547 msg_type = "Query Mapping response";
548 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
549 resp_query_policy, nltb, msg_type))
550 return -EINVAL;
551 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
552
553 msg_seq = nla_get_u32(nltb[IWPM_NLA_RQUERY_MAPPING_SEQ]);
554 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
555 if (!nlmsg_request) {
556 pr_info("%s: Could not find a matching request (seq = %u)\n",
557 __func__, msg_seq);
558 return -EINVAL;
559 }
560 pm_msg = nlmsg_request->req_buffer;
561 local_sockaddr = (struct sockaddr_storage *)
562 nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
563 remote_sockaddr = (struct sockaddr_storage *)
564 nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
565 mapped_loc_sockaddr = (struct sockaddr_storage *)
566 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
567 mapped_rem_sockaddr = (struct sockaddr_storage *)
568 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
569
570 err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]);
571 if (err_code == IWPM_REMOTE_QUERY_REJECT) {
572 pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n",
573 __func__, cb->nlh->nlmsg_pid, msg_seq);
574 nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT;
575 }
576 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) ||
577 iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) {
578 pr_info("%s: Incorrect local sockaddr\n", __func__);
579 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
580 goto query_mapping_response_exit;
581 }
582 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
583 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
584 pr_info("%s: Sockaddr family doesn't match the requested one\n",
585 __func__);
586 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
587 goto query_mapping_response_exit;
588 }
589 memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr,
590 sizeof(*mapped_loc_sockaddr));
591 memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr,
592 sizeof(*mapped_rem_sockaddr));
593
594 iwpm_print_sockaddr(&pm_msg->loc_addr,
595 "query_mapping: Local sockaddr:");
596 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
597 "query_mapping: Mapped local sockaddr:");
598 iwpm_print_sockaddr(&pm_msg->rem_addr,
599 "query_mapping: Remote sockaddr:");
600 iwpm_print_sockaddr(&pm_msg->mapped_rem_addr,
601 "query_mapping: Mapped remote sockaddr:");
602query_mapping_response_exit:
603 nlmsg_request->request_done = 1;
604 /* always for found request */
605 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
606 barrier();
607 up(&nlmsg_request->sem);
608 return 0;
609}
610
611/**
612 * iwpm_remote_info_cb - Process remote connecting peer address info, which
613 * the port mapper has received from the connecting peer
614 * @skb: The socket buffer
615 * @cb: Contains the received message (payload and netlink header)
616 *
617 * Stores the IPv4/IPv6 address info in a hash table
618 */
619int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
620{
621 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
622 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
623 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
624 struct iwpm_remote_info *rem_info;
625 const char *msg_type;
626 u8 nl_client;
627 int ret = -EINVAL;
628
629 msg_type = "Remote Mapping info";
630 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
631 resp_query_policy, nltb, msg_type))
632 return ret;
633
634 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
635 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
636
637 local_sockaddr = (struct sockaddr_storage *)
638 nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
639 remote_sockaddr = (struct sockaddr_storage *)
640 nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
641 mapped_loc_sockaddr = (struct sockaddr_storage *)
642 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
643 mapped_rem_sockaddr = (struct sockaddr_storage *)
644 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
645
646 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
647 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
648 pr_info("%s: Sockaddr family doesn't match the requested one\n",
649 __func__);
650 return ret;
651 }
652 rem_info = kzalloc(sizeof(struct iwpm_remote_info), GFP_ATOMIC);
653 if (!rem_info) {
654 ret = -ENOMEM;
655 return ret;
656 }
657 memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr,
658 sizeof(struct sockaddr_storage));
659 memcpy(&rem_info->remote_sockaddr, remote_sockaddr,
660 sizeof(struct sockaddr_storage));
661 memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr,
662 sizeof(struct sockaddr_storage));
663 rem_info->nl_client = nl_client;
664
665 iwpm_add_remote_info(rem_info);
666
667 iwpm_print_sockaddr(local_sockaddr,
668 "remote_info: Local sockaddr:");
669 iwpm_print_sockaddr(mapped_loc_sockaddr,
670 "remote_info: Mapped local sockaddr:");
671 iwpm_print_sockaddr(remote_sockaddr,
672 "remote_info: Remote sockaddr:");
673 iwpm_print_sockaddr(mapped_rem_sockaddr,
674 "remote_info: Mapped remote sockaddr:");
675 return ret;
676}
677
678/* netlink attribute policy for the received request for mapping info */
679static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
680 [IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING,
681 .len = IWPM_ULIBNAME_SIZE - 1 },
682 [IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 }
683};
684
685/**
686 * iwpm_mapping_info_cb - Process a notification that the userspace
687 * port mapper daemon is started
688 * @skb: The socket buffer
689 * @cb: Contains the received message (payload and netlink header)
690 *
691 * Using the received port mapper pid, send all the local mapping
692 * info records to the userspace port mapper
693 */
694int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
695{
696 struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX];
697 const char *msg_type = "Mapping Info response";
698 u8 nl_client;
699 char *iwpm_name;
700 u16 iwpm_version;
701 int ret = -EINVAL;
702
703 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX,
704 resp_mapinfo_policy, nltb, msg_type)) {
705 pr_info("%s: Unable to parse nlmsg\n", __func__);
706 return ret;
707 }
708 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]);
709 iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]);
710 if (strcmp(iwpm_ulib_name, iwpm_name) ||
711 iwpm_version < IWPM_UABI_VERSION_MIN) {
712 pr_info("%s: Invalid port mapper name = %s version = %u\n",
713 __func__, iwpm_name, iwpm_version);
714 return ret;
715 }
716 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
717 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
718 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
719 iwpm_user_pid = cb->nlh->nlmsg_pid;
720
721 if (iwpm_ulib_version < IWPM_UABI_VERSION)
722 pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
723 __func__, iwpm_user_pid);
724
725 if (!iwpm_mapinfo_available())
726 return 0;
727 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
728 __func__, iwpm_user_pid);
729 ret = iwpm_send_mapinfo(nl_client, iwpm_user_pid);
730 return ret;
731}
732
733/* netlink attribute policy for the received mapping info ack */
734static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = {
735 [IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 },
736 [IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 },
737 [IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 }
738};
739
740/**
741 * iwpm_ack_mapping_info_cb - Process the port mapper ack for
742 * the provided local mapping info records
743 * @skb: The socket buffer
744 * @cb: Contains the received message (payload and netlink header)
745 */
746int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
747{
748 struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX];
749 u32 mapinfo_send, mapinfo_ack;
750 const char *msg_type = "Mapping Info Ack";
751
752 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX,
753 ack_mapinfo_policy, nltb, msg_type))
754 return -EINVAL;
755 mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]);
756 mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]);
757 if (mapinfo_ack != mapinfo_send)
758 pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n",
759 __func__, mapinfo_send, mapinfo_ack);
760 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
761 return 0;
762}
763
764/* netlink attribute policy for the received port mapper error message */
765static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = {
766 [IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 },
767 [IWPM_NLA_ERR_CODE] = { .type = NLA_U16 },
768};
769
770/**
771 * iwpm_mapping_error_cb - Process port mapper notification for error
772 *
773 * @skb: The socket buffer
774 * @cb: Contains the received message (payload and netlink header)
775 */
776int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
777{
778 struct iwpm_nlmsg_request *nlmsg_request = NULL;
779 int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
780 struct nlattr *nltb[IWPM_NLA_ERR_MAX];
781 u32 msg_seq;
782 u16 err_code;
783 const char *msg_type = "Mapping Error Msg";
784
785 if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX,
786 map_error_policy, nltb, msg_type))
787 return -EINVAL;
788
789 msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]);
790 err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]);
791 pr_info("%s: Received msg seq = %u err code = %u client = %d\n",
792 __func__, msg_seq, err_code, nl_client);
793 /* look for nlmsg_request */
794 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
795 if (!nlmsg_request) {
796 /* not all errors have associated requests */
797 pr_debug("Could not find matching req (seq = %u)\n", msg_seq);
798 return 0;
799 }
800 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
801 nlmsg_request->err_code = err_code;
802 nlmsg_request->request_done = 1;
803 /* always for found request */
804 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
805 barrier();
806 up(&nlmsg_request->sem);
807 return 0;
808}
809
810/* netlink attribute policy for the received hello request */
811static const struct nla_policy hello_policy[IWPM_NLA_HELLO_MAX] = {
812 [IWPM_NLA_HELLO_ABI_VERSION] = { .type = NLA_U16 }
813};
814
815/**
816 * iwpm_hello_cb - Process a hello message from iwpmd
817 *
818 * @skb: The socket buffer
819 * @cb: Contains the received message (payload and netlink header)
820 *
821 * Using the received port mapper pid, send the kernel's abi_version
822 * after adjusting it to support the iwpmd version.
823 */
824int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb)
825{
826 struct nlattr *nltb[IWPM_NLA_HELLO_MAX];
827 const char *msg_type = "Hello request";
828 u8 nl_client;
829 u16 abi_version;
830 int ret = -EINVAL;
831
832 if (iwpm_parse_nlmsg(cb, IWPM_NLA_HELLO_MAX, hello_policy, nltb,
833 msg_type)) {
834 pr_info("%s: Unable to parse nlmsg\n", __func__);
835 return ret;
836 }
837 abi_version = nla_get_u16(nltb[IWPM_NLA_HELLO_ABI_VERSION]);
838 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
839 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
840 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
841 iwpm_ulib_version = min_t(u16, IWPM_UABI_VERSION, abi_version);
842 pr_debug("Using ABI version %u\n", iwpm_ulib_version);
843 iwpm_user_pid = cb->nlh->nlmsg_pid;
844 ret = iwpm_send_hello(nl_client, iwpm_user_pid, iwpm_ulib_version);
845 return ret;
846}
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
36static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
37u16 iwpm_ulib_version = IWPM_UABI_VERSION_MIN;
38static int iwpm_user_pid = IWPM_PID_UNDEFINED;
39static atomic_t echo_nlmsg_seq;
40
41/**
42 * iwpm_valid_pid - Check if the userspace iwarp port mapper pid is valid
43 *
44 * Returns true if the pid is greater than zero, otherwise returns false
45 */
46int iwpm_valid_pid(void)
47{
48 return iwpm_user_pid > 0;
49}
50
51/**
52 * iwpm_register_pid - Send a netlink query to userspace
53 * to get the iwarp port mapper pid
54 * @pm_msg: Contains driver info to send to the userspace port mapper
55 * @nl_client: The index of the netlink client
56 *
57 * nlmsg attributes:
58 * [IWPM_NLA_REG_PID_SEQ]
59 * [IWPM_NLA_REG_IF_NAME]
60 * [IWPM_NLA_REG_IBDEV_NAME]
61 * [IWPM_NLA_REG_ULIB_NAME]
62 */
63int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
64{
65 struct sk_buff *skb = NULL;
66 struct iwpm_nlmsg_request *nlmsg_request = NULL;
67 struct nlmsghdr *nlh;
68 u32 msg_seq;
69 const char *err_str = "";
70 int ret = -EINVAL;
71
72 if (!iwpm_valid_client(nl_client)) {
73 err_str = "Invalid port mapper client";
74 goto pid_query_error;
75 }
76 if (iwpm_check_registration(nl_client, IWPM_REG_VALID) ||
77 iwpm_user_pid == IWPM_PID_UNAVAILABLE)
78 return 0;
79 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client);
80 if (!skb) {
81 err_str = "Unable to create a nlmsg";
82 goto pid_query_error;
83 }
84 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
85 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
86 if (!nlmsg_request) {
87 err_str = "Unable to allocate netlink request";
88 goto pid_query_error;
89 }
90 msg_seq = atomic_read(&echo_nlmsg_seq);
91
92 /* fill in the pid request message */
93 err_str = "Unable to put attribute of the nlmsg";
94 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ);
95 if (ret)
96 goto pid_query_error;
97 ret = ibnl_put_attr(skb, nlh, IFNAMSIZ,
98 pm_msg->if_name, IWPM_NLA_REG_IF_NAME);
99 if (ret)
100 goto pid_query_error;
101 ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE,
102 pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME);
103 if (ret)
104 goto pid_query_error;
105 ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE,
106 (char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME);
107 if (ret)
108 goto pid_query_error;
109
110 nlmsg_end(skb, nlh);
111
112 pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n",
113 __func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name);
114
115 ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
116 if (ret) {
117 skb = NULL; /* skb is freed in the netlink send-op handling */
118 iwpm_user_pid = IWPM_PID_UNAVAILABLE;
119 err_str = "Unable to send a nlmsg";
120 goto pid_query_error;
121 }
122 nlmsg_request->req_buffer = pm_msg;
123 ret = iwpm_wait_complete_req(nlmsg_request);
124 return ret;
125pid_query_error:
126 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
127 dev_kfree_skb(skb);
128 if (nlmsg_request)
129 iwpm_free_nlmsg_request(&nlmsg_request->kref);
130 return ret;
131}
132
133/**
134 * iwpm_add_mapping - Send a netlink add mapping request to
135 * the userspace port mapper
136 * @pm_msg: Contains the local ip/tcp address info to send
137 * @nl_client: The index of the netlink client
138 *
139 * nlmsg attributes:
140 * [IWPM_NLA_MANAGE_MAPPING_SEQ]
141 * [IWPM_NLA_MANAGE_ADDR]
142 * [IWPM_NLA_MANAGE_FLAGS]
143 *
144 * If the request is successful, the pm_msg stores
145 * the port mapper response (mapped address info)
146 */
147int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
148{
149 struct sk_buff *skb = NULL;
150 struct iwpm_nlmsg_request *nlmsg_request = NULL;
151 struct nlmsghdr *nlh;
152 u32 msg_seq;
153 const char *err_str = "";
154 int ret = -EINVAL;
155
156 if (!iwpm_valid_client(nl_client)) {
157 err_str = "Invalid port mapper client";
158 goto add_mapping_error;
159 }
160 if (!iwpm_valid_pid())
161 return 0;
162 if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
163 err_str = "Unregistered port mapper client";
164 goto add_mapping_error;
165 }
166 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client);
167 if (!skb) {
168 err_str = "Unable to create a nlmsg";
169 goto add_mapping_error;
170 }
171 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
172 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
173 if (!nlmsg_request) {
174 err_str = "Unable to allocate netlink request";
175 goto add_mapping_error;
176 }
177 msg_seq = atomic_read(&echo_nlmsg_seq);
178 /* fill in the add mapping message */
179 err_str = "Unable to put attribute of the nlmsg";
180 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
181 IWPM_NLA_MANAGE_MAPPING_SEQ);
182 if (ret)
183 goto add_mapping_error;
184 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
185 &pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR);
186 if (ret)
187 goto add_mapping_error;
188
189 /* If flags are required and we're not V4, then return a quiet error */
190 if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
191 ret = -EINVAL;
192 goto add_mapping_error_nowarn;
193 }
194 if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
195 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
196 IWPM_NLA_MANAGE_FLAGS);
197 if (ret)
198 goto add_mapping_error;
199 }
200
201 nlmsg_end(skb, nlh);
202 nlmsg_request->req_buffer = pm_msg;
203
204 ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
205 if (ret) {
206 skb = NULL; /* skb is freed in the netlink send-op handling */
207 iwpm_user_pid = IWPM_PID_UNDEFINED;
208 err_str = "Unable to send a nlmsg";
209 goto add_mapping_error;
210 }
211 ret = iwpm_wait_complete_req(nlmsg_request);
212 return ret;
213add_mapping_error:
214 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
215add_mapping_error_nowarn:
216 dev_kfree_skb(skb);
217 if (nlmsg_request)
218 iwpm_free_nlmsg_request(&nlmsg_request->kref);
219 return ret;
220}
221
222/**
223 * iwpm_add_and_query_mapping - Process the port mapper response to
224 * iwpm_add_and_query_mapping request
225 * @pm_msg: Contains the local ip/tcp address info to send
226 * @nl_client: The index of the netlink client
227 *
228 * nlmsg attributes:
229 * [IWPM_NLA_QUERY_MAPPING_SEQ]
230 * [IWPM_NLA_QUERY_LOCAL_ADDR]
231 * [IWPM_NLA_QUERY_REMOTE_ADDR]
232 * [IWPM_NLA_QUERY_FLAGS]
233 */
234int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
235{
236 struct sk_buff *skb = NULL;
237 struct iwpm_nlmsg_request *nlmsg_request = NULL;
238 struct nlmsghdr *nlh;
239 u32 msg_seq;
240 const char *err_str = "";
241 int ret = -EINVAL;
242
243 if (!iwpm_valid_client(nl_client)) {
244 err_str = "Invalid port mapper client";
245 goto query_mapping_error;
246 }
247 if (!iwpm_valid_pid())
248 return 0;
249 if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
250 err_str = "Unregistered port mapper client";
251 goto query_mapping_error;
252 }
253 ret = -ENOMEM;
254 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client);
255 if (!skb) {
256 err_str = "Unable to create a nlmsg";
257 goto query_mapping_error;
258 }
259 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
260 nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq,
261 nl_client, GFP_KERNEL);
262 if (!nlmsg_request) {
263 err_str = "Unable to allocate netlink request";
264 goto query_mapping_error;
265 }
266 msg_seq = atomic_read(&echo_nlmsg_seq);
267
268 /* fill in the query message */
269 err_str = "Unable to put attribute of the nlmsg";
270 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
271 IWPM_NLA_QUERY_MAPPING_SEQ);
272 if (ret)
273 goto query_mapping_error;
274 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
275 &pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR);
276 if (ret)
277 goto query_mapping_error;
278 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
279 &pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR);
280 if (ret)
281 goto query_mapping_error;
282
283 /* If flags are required and we're not V4, then return a quite error */
284 if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
285 ret = -EINVAL;
286 goto query_mapping_error_nowarn;
287 }
288 if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
289 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
290 IWPM_NLA_QUERY_FLAGS);
291 if (ret)
292 goto query_mapping_error;
293 }
294
295 nlmsg_end(skb, nlh);
296 nlmsg_request->req_buffer = pm_msg;
297
298 ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
299 if (ret) {
300 skb = NULL; /* skb is freed in the netlink send-op handling */
301 err_str = "Unable to send a nlmsg";
302 goto query_mapping_error;
303 }
304 ret = iwpm_wait_complete_req(nlmsg_request);
305 return ret;
306query_mapping_error:
307 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
308query_mapping_error_nowarn:
309 dev_kfree_skb(skb);
310 if (nlmsg_request)
311 iwpm_free_nlmsg_request(&nlmsg_request->kref);
312 return ret;
313}
314
315/**
316 * iwpm_remove_mapping - Send a netlink remove mapping request
317 * to the userspace port mapper
318 *
319 * @local_addr: Local ip/tcp address to remove
320 * @nl_client: The index of the netlink client
321 *
322 * nlmsg attributes:
323 * [IWPM_NLA_MANAGE_MAPPING_SEQ]
324 * [IWPM_NLA_MANAGE_ADDR]
325 */
326int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
327{
328 struct sk_buff *skb = NULL;
329 struct nlmsghdr *nlh;
330 u32 msg_seq;
331 const char *err_str = "";
332 int ret = -EINVAL;
333
334 if (!iwpm_valid_client(nl_client)) {
335 err_str = "Invalid port mapper client";
336 goto remove_mapping_error;
337 }
338 if (!iwpm_valid_pid())
339 return 0;
340 if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
341 err_str = "Unregistered port mapper client";
342 goto remove_mapping_error;
343 }
344 skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client);
345 if (!skb) {
346 ret = -ENOMEM;
347 err_str = "Unable to create a nlmsg";
348 goto remove_mapping_error;
349 }
350 msg_seq = atomic_read(&echo_nlmsg_seq);
351 nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
352 err_str = "Unable to put attribute of the nlmsg";
353 ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
354 IWPM_NLA_MANAGE_MAPPING_SEQ);
355 if (ret)
356 goto remove_mapping_error;
357 ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
358 local_addr, IWPM_NLA_MANAGE_ADDR);
359 if (ret)
360 goto remove_mapping_error;
361
362 nlmsg_end(skb, nlh);
363
364 ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
365 if (ret) {
366 skb = NULL; /* skb is freed in the netlink send-op handling */
367 iwpm_user_pid = IWPM_PID_UNDEFINED;
368 err_str = "Unable to send a nlmsg";
369 goto remove_mapping_error;
370 }
371 iwpm_print_sockaddr(local_addr,
372 "remove_mapping: Local sockaddr:");
373 return 0;
374remove_mapping_error:
375 pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
376 if (skb)
377 dev_kfree_skb_any(skb);
378 return ret;
379}
380
381/* netlink attribute policy for the received response to register pid request */
382static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = {
383 [IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 },
384 [IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING,
385 .len = IWPM_DEVNAME_SIZE - 1 },
386 [IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING,
387 .len = IWPM_ULIBNAME_SIZE - 1 },
388 [IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 },
389 [IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 }
390};
391
392/**
393 * iwpm_register_pid_cb - Process the port mapper response to
394 * iwpm_register_pid query
395 * @skb:
396 * @cb: Contains the received message (payload and netlink header)
397 *
398 * If successful, the function receives the userspace port mapper pid
399 * which is used in future communication with the port mapper
400 */
401int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
402{
403 struct iwpm_nlmsg_request *nlmsg_request = NULL;
404 struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX];
405 struct iwpm_dev_data *pm_msg;
406 char *dev_name, *iwpm_name;
407 u32 msg_seq;
408 u8 nl_client;
409 u16 iwpm_version;
410 const char *msg_type = "Register Pid response";
411
412 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX,
413 resp_reg_policy, nltb, msg_type))
414 return -EINVAL;
415
416 msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_SEQ]);
417 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
418 if (!nlmsg_request) {
419 pr_info("%s: Could not find a matching request (seq = %u)\n",
420 __func__, msg_seq);
421 return -EINVAL;
422 }
423 pm_msg = nlmsg_request->req_buffer;
424 nl_client = nlmsg_request->nl_client;
425 dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]);
426 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]);
427 iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]);
428
429 /* check device name, ulib name and version */
430 if (strcmp(pm_msg->dev_name, dev_name) ||
431 strcmp(iwpm_ulib_name, iwpm_name) ||
432 iwpm_version < IWPM_UABI_VERSION_MIN) {
433
434 pr_info("%s: Incorrect info (dev = %s name = %s version = %d)\n",
435 __func__, dev_name, iwpm_name, iwpm_version);
436 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
437 goto register_pid_response_exit;
438 }
439 iwpm_user_pid = cb->nlh->nlmsg_pid;
440 iwpm_ulib_version = iwpm_version;
441 if (iwpm_ulib_version < IWPM_UABI_VERSION)
442 pr_warn_once("%s: Down level iwpmd/pid %u. Continuing...",
443 __func__, iwpm_user_pid);
444 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
445 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
446 __func__, iwpm_user_pid);
447 if (iwpm_valid_client(nl_client))
448 iwpm_set_registration(nl_client, IWPM_REG_VALID);
449register_pid_response_exit:
450 nlmsg_request->request_done = 1;
451 /* always for found nlmsg_request */
452 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
453 barrier();
454 up(&nlmsg_request->sem);
455 return 0;
456}
457
458/* netlink attribute policy for the received response to add mapping request */
459static const struct nla_policy resp_add_policy[IWPM_NLA_RMANAGE_MAPPING_MAX] = {
460 [IWPM_NLA_RMANAGE_MAPPING_SEQ] = { .type = NLA_U32 },
461 [IWPM_NLA_RMANAGE_ADDR] = {
462 .len = sizeof(struct sockaddr_storage) },
463 [IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR] = {
464 .len = sizeof(struct sockaddr_storage) },
465 [IWPM_NLA_RMANAGE_MAPPING_ERR] = { .type = NLA_U16 }
466};
467
468/**
469 * iwpm_add_mapping_cb - Process the port mapper response to
470 * iwpm_add_mapping request
471 * @skb:
472 * @cb: Contains the received message (payload and netlink header)
473 */
474int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
475{
476 struct iwpm_sa_data *pm_msg;
477 struct iwpm_nlmsg_request *nlmsg_request = NULL;
478 struct nlattr *nltb[IWPM_NLA_RMANAGE_MAPPING_MAX];
479 struct sockaddr_storage *local_sockaddr;
480 struct sockaddr_storage *mapped_sockaddr;
481 const char *msg_type;
482 u32 msg_seq;
483
484 msg_type = "Add Mapping response";
485 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RMANAGE_MAPPING_MAX,
486 resp_add_policy, nltb, msg_type))
487 return -EINVAL;
488
489 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
490
491 msg_seq = nla_get_u32(nltb[IWPM_NLA_RMANAGE_MAPPING_SEQ]);
492 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
493 if (!nlmsg_request) {
494 pr_info("%s: Could not find a matching request (seq = %u)\n",
495 __func__, msg_seq);
496 return -EINVAL;
497 }
498 pm_msg = nlmsg_request->req_buffer;
499 local_sockaddr = (struct sockaddr_storage *)
500 nla_data(nltb[IWPM_NLA_RMANAGE_ADDR]);
501 mapped_sockaddr = (struct sockaddr_storage *)
502 nla_data(nltb[IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR]);
503
504 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) {
505 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
506 goto add_mapping_response_exit;
507 }
508 if (mapped_sockaddr->ss_family != local_sockaddr->ss_family) {
509 pr_info("%s: Sockaddr family doesn't match the requested one\n",
510 __func__);
511 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
512 goto add_mapping_response_exit;
513 }
514 memcpy(&pm_msg->mapped_loc_addr, mapped_sockaddr,
515 sizeof(*mapped_sockaddr));
516 iwpm_print_sockaddr(&pm_msg->loc_addr,
517 "add_mapping: Local sockaddr:");
518 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
519 "add_mapping: Mapped local sockaddr:");
520
521add_mapping_response_exit:
522 nlmsg_request->request_done = 1;
523 /* always for found request */
524 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
525 barrier();
526 up(&nlmsg_request->sem);
527 return 0;
528}
529
530/* netlink attribute policy for the response to add and query mapping request
531 * and response with remote address info */
532static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = {
533 [IWPM_NLA_RQUERY_MAPPING_SEQ] = { .type = NLA_U32 },
534 [IWPM_NLA_RQUERY_LOCAL_ADDR] = {
535 .len = sizeof(struct sockaddr_storage) },
536 [IWPM_NLA_RQUERY_REMOTE_ADDR] = {
537 .len = sizeof(struct sockaddr_storage) },
538 [IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = {
539 .len = sizeof(struct sockaddr_storage) },
540 [IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = {
541 .len = sizeof(struct sockaddr_storage) },
542 [IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 }
543};
544
545/**
546 * iwpm_add_and_query_mapping_cb - Process the port mapper response to
547 * iwpm_add_and_query_mapping request
548 * @skb:
549 * @cb: Contains the received message (payload and netlink header)
550 */
551int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
552 struct netlink_callback *cb)
553{
554 struct iwpm_sa_data *pm_msg;
555 struct iwpm_nlmsg_request *nlmsg_request = NULL;
556 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
557 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
558 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
559 const char *msg_type;
560 u32 msg_seq;
561 u16 err_code;
562
563 msg_type = "Query Mapping response";
564 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
565 resp_query_policy, nltb, msg_type))
566 return -EINVAL;
567 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
568
569 msg_seq = nla_get_u32(nltb[IWPM_NLA_RQUERY_MAPPING_SEQ]);
570 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
571 if (!nlmsg_request) {
572 pr_info("%s: Could not find a matching request (seq = %u)\n",
573 __func__, msg_seq);
574 return -EINVAL;
575 }
576 pm_msg = nlmsg_request->req_buffer;
577 local_sockaddr = (struct sockaddr_storage *)
578 nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
579 remote_sockaddr = (struct sockaddr_storage *)
580 nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
581 mapped_loc_sockaddr = (struct sockaddr_storage *)
582 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
583 mapped_rem_sockaddr = (struct sockaddr_storage *)
584 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
585
586 err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]);
587 if (err_code == IWPM_REMOTE_QUERY_REJECT) {
588 pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n",
589 __func__, cb->nlh->nlmsg_pid, msg_seq);
590 nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT;
591 }
592 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) ||
593 iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) {
594 pr_info("%s: Incorrect local sockaddr\n", __func__);
595 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
596 goto query_mapping_response_exit;
597 }
598 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
599 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
600 pr_info("%s: Sockaddr family doesn't match the requested one\n",
601 __func__);
602 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
603 goto query_mapping_response_exit;
604 }
605 memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr,
606 sizeof(*mapped_loc_sockaddr));
607 memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr,
608 sizeof(*mapped_rem_sockaddr));
609
610 iwpm_print_sockaddr(&pm_msg->loc_addr,
611 "query_mapping: Local sockaddr:");
612 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
613 "query_mapping: Mapped local sockaddr:");
614 iwpm_print_sockaddr(&pm_msg->rem_addr,
615 "query_mapping: Remote sockaddr:");
616 iwpm_print_sockaddr(&pm_msg->mapped_rem_addr,
617 "query_mapping: Mapped remote sockaddr:");
618query_mapping_response_exit:
619 nlmsg_request->request_done = 1;
620 /* always for found request */
621 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
622 barrier();
623 up(&nlmsg_request->sem);
624 return 0;
625}
626
627/**
628 * iwpm_remote_info_cb - Process remote connecting peer address info, which
629 * the port mapper has received from the connecting peer
630 * @skb:
631 * @cb: Contains the received message (payload and netlink header)
632 *
633 * Stores the IPv4/IPv6 address info in a hash table
634 */
635int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
636{
637 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
638 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
639 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
640 struct iwpm_remote_info *rem_info;
641 const char *msg_type;
642 u8 nl_client;
643 int ret = -EINVAL;
644
645 msg_type = "Remote Mapping info";
646 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
647 resp_query_policy, nltb, msg_type))
648 return ret;
649
650 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
651 if (!iwpm_valid_client(nl_client)) {
652 pr_info("%s: Invalid port mapper client = %d\n",
653 __func__, nl_client);
654 return ret;
655 }
656 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
657
658 local_sockaddr = (struct sockaddr_storage *)
659 nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
660 remote_sockaddr = (struct sockaddr_storage *)
661 nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
662 mapped_loc_sockaddr = (struct sockaddr_storage *)
663 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
664 mapped_rem_sockaddr = (struct sockaddr_storage *)
665 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
666
667 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
668 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
669 pr_info("%s: Sockaddr family doesn't match the requested one\n",
670 __func__);
671 return ret;
672 }
673 rem_info = kzalloc(sizeof(struct iwpm_remote_info), GFP_ATOMIC);
674 if (!rem_info) {
675 ret = -ENOMEM;
676 return ret;
677 }
678 memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr,
679 sizeof(struct sockaddr_storage));
680 memcpy(&rem_info->remote_sockaddr, remote_sockaddr,
681 sizeof(struct sockaddr_storage));
682 memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr,
683 sizeof(struct sockaddr_storage));
684 rem_info->nl_client = nl_client;
685
686 iwpm_add_remote_info(rem_info);
687
688 iwpm_print_sockaddr(local_sockaddr,
689 "remote_info: Local sockaddr:");
690 iwpm_print_sockaddr(mapped_loc_sockaddr,
691 "remote_info: Mapped local sockaddr:");
692 iwpm_print_sockaddr(remote_sockaddr,
693 "remote_info: Remote sockaddr:");
694 iwpm_print_sockaddr(mapped_rem_sockaddr,
695 "remote_info: Mapped remote sockaddr:");
696 return ret;
697}
698
699/* netlink attribute policy for the received request for mapping info */
700static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
701 [IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING,
702 .len = IWPM_ULIBNAME_SIZE - 1 },
703 [IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 }
704};
705
706/**
707 * iwpm_mapping_info_cb - Process a notification that the userspace
708 * port mapper daemon is started
709 * @skb:
710 * @cb: Contains the received message (payload and netlink header)
711 *
712 * Using the received port mapper pid, send all the local mapping
713 * info records to the userspace port mapper
714 */
715int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
716{
717 struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX];
718 const char *msg_type = "Mapping Info response";
719 u8 nl_client;
720 char *iwpm_name;
721 u16 iwpm_version;
722 int ret = -EINVAL;
723
724 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX,
725 resp_mapinfo_policy, nltb, msg_type)) {
726 pr_info("%s: Unable to parse nlmsg\n", __func__);
727 return ret;
728 }
729 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]);
730 iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]);
731 if (strcmp(iwpm_ulib_name, iwpm_name) ||
732 iwpm_version < IWPM_UABI_VERSION_MIN) {
733 pr_info("%s: Invalid port mapper name = %s version = %d\n",
734 __func__, iwpm_name, iwpm_version);
735 return ret;
736 }
737 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
738 if (!iwpm_valid_client(nl_client)) {
739 pr_info("%s: Invalid port mapper client = %d\n",
740 __func__, nl_client);
741 return ret;
742 }
743 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
744 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
745 iwpm_user_pid = cb->nlh->nlmsg_pid;
746
747 if (iwpm_ulib_version < IWPM_UABI_VERSION)
748 pr_warn_once("%s: Down level iwpmd/pid %u. Continuing...",
749 __func__, iwpm_user_pid);
750
751 if (!iwpm_mapinfo_available())
752 return 0;
753 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
754 __func__, iwpm_user_pid);
755 ret = iwpm_send_mapinfo(nl_client, iwpm_user_pid);
756 return ret;
757}
758
759/* netlink attribute policy for the received mapping info ack */
760static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = {
761 [IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 },
762 [IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 },
763 [IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 }
764};
765
766/**
767 * iwpm_ack_mapping_info_cb - Process the port mapper ack for
768 * the provided local mapping info records
769 * @skb:
770 * @cb: Contains the received message (payload and netlink header)
771 */
772int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
773{
774 struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX];
775 u32 mapinfo_send, mapinfo_ack;
776 const char *msg_type = "Mapping Info Ack";
777
778 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX,
779 ack_mapinfo_policy, nltb, msg_type))
780 return -EINVAL;
781 mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]);
782 mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]);
783 if (mapinfo_ack != mapinfo_send)
784 pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n",
785 __func__, mapinfo_send, mapinfo_ack);
786 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
787 return 0;
788}
789
790/* netlink attribute policy for the received port mapper error message */
791static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = {
792 [IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 },
793 [IWPM_NLA_ERR_CODE] = { .type = NLA_U16 },
794};
795
796/**
797 * iwpm_mapping_error_cb - Process port mapper notification for error
798 *
799 * @skb:
800 * @cb: Contains the received message (payload and netlink header)
801 */
802int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
803{
804 struct iwpm_nlmsg_request *nlmsg_request = NULL;
805 int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
806 struct nlattr *nltb[IWPM_NLA_ERR_MAX];
807 u32 msg_seq;
808 u16 err_code;
809 const char *msg_type = "Mapping Error Msg";
810
811 if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX,
812 map_error_policy, nltb, msg_type))
813 return -EINVAL;
814
815 msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]);
816 err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]);
817 pr_info("%s: Received msg seq = %u err code = %u client = %d\n",
818 __func__, msg_seq, err_code, nl_client);
819 /* look for nlmsg_request */
820 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
821 if (!nlmsg_request) {
822 /* not all errors have associated requests */
823 pr_debug("Could not find matching req (seq = %u)\n", msg_seq);
824 return 0;
825 }
826 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
827 nlmsg_request->err_code = err_code;
828 nlmsg_request->request_done = 1;
829 /* always for found request */
830 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
831 barrier();
832 up(&nlmsg_request->sem);
833 return 0;
834}
835
836/* netlink attribute policy for the received hello request */
837static const struct nla_policy hello_policy[IWPM_NLA_HELLO_MAX] = {
838 [IWPM_NLA_HELLO_ABI_VERSION] = { .type = NLA_U16 }
839};
840
841/**
842 * iwpm_hello_cb - Process a hello message from iwpmd
843 *
844 * @skb:
845 * @cb: Contains the received message (payload and netlink header)
846 *
847 * Using the received port mapper pid, send the kernel's abi_version
848 * after adjusting it to support the iwpmd version.
849 */
850int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb)
851{
852 struct nlattr *nltb[IWPM_NLA_HELLO_MAX];
853 const char *msg_type = "Hello request";
854 u8 nl_client;
855 u16 abi_version;
856 int ret = -EINVAL;
857
858 if (iwpm_parse_nlmsg(cb, IWPM_NLA_HELLO_MAX, hello_policy, nltb,
859 msg_type)) {
860 pr_info("%s: Unable to parse nlmsg\n", __func__);
861 return ret;
862 }
863 abi_version = nla_get_u16(nltb[IWPM_NLA_HELLO_ABI_VERSION]);
864 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
865 if (!iwpm_valid_client(nl_client)) {
866 pr_info("%s: Invalid port mapper client = %d\n",
867 __func__, nl_client);
868 return ret;
869 }
870 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
871 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
872 iwpm_ulib_version = min_t(u16, IWPM_UABI_VERSION, abi_version);
873 pr_debug("Using ABI version %u\n", iwpm_ulib_version);
874 iwpm_user_pid = cb->nlh->nlmsg_pid;
875 ret = iwpm_send_hello(nl_client, iwpm_user_pid, iwpm_ulib_version);
876 return ret;
877}