Loading...
Note: File does not exist in v3.1.
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 = %u)\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 = %u)\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 = %u)\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 = %u)\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: The socket buffer
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 = %u)\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 %d. 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: The socket buffer
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
532 */
533static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = {
534 [IWPM_NLA_RQUERY_MAPPING_SEQ] = { .type = NLA_U32 },
535 [IWPM_NLA_RQUERY_LOCAL_ADDR] = {
536 .len = sizeof(struct sockaddr_storage) },
537 [IWPM_NLA_RQUERY_REMOTE_ADDR] = {
538 .len = sizeof(struct sockaddr_storage) },
539 [IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = {
540 .len = sizeof(struct sockaddr_storage) },
541 [IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = {
542 .len = sizeof(struct sockaddr_storage) },
543 [IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 }
544};
545
546/**
547 * iwpm_add_and_query_mapping_cb - Process the port mapper response to
548 * iwpm_add_and_query_mapping request
549 * @skb: The socket buffer
550 * @cb: Contains the received message (payload and netlink header)
551 */
552int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
553 struct netlink_callback *cb)
554{
555 struct iwpm_sa_data *pm_msg;
556 struct iwpm_nlmsg_request *nlmsg_request = NULL;
557 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
558 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
559 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
560 const char *msg_type;
561 u32 msg_seq;
562 u16 err_code;
563
564 msg_type = "Query Mapping response";
565 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
566 resp_query_policy, nltb, msg_type))
567 return -EINVAL;
568 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
569
570 msg_seq = nla_get_u32(nltb[IWPM_NLA_RQUERY_MAPPING_SEQ]);
571 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
572 if (!nlmsg_request) {
573 pr_info("%s: Could not find a matching request (seq = %u)\n",
574 __func__, msg_seq);
575 return -EINVAL;
576 }
577 pm_msg = nlmsg_request->req_buffer;
578 local_sockaddr = (struct sockaddr_storage *)
579 nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
580 remote_sockaddr = (struct sockaddr_storage *)
581 nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
582 mapped_loc_sockaddr = (struct sockaddr_storage *)
583 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
584 mapped_rem_sockaddr = (struct sockaddr_storage *)
585 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
586
587 err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]);
588 if (err_code == IWPM_REMOTE_QUERY_REJECT) {
589 pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n",
590 __func__, cb->nlh->nlmsg_pid, msg_seq);
591 nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT;
592 }
593 if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) ||
594 iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) {
595 pr_info("%s: Incorrect local sockaddr\n", __func__);
596 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
597 goto query_mapping_response_exit;
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 nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
604 goto query_mapping_response_exit;
605 }
606 memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr,
607 sizeof(*mapped_loc_sockaddr));
608 memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr,
609 sizeof(*mapped_rem_sockaddr));
610
611 iwpm_print_sockaddr(&pm_msg->loc_addr,
612 "query_mapping: Local sockaddr:");
613 iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
614 "query_mapping: Mapped local sockaddr:");
615 iwpm_print_sockaddr(&pm_msg->rem_addr,
616 "query_mapping: Remote sockaddr:");
617 iwpm_print_sockaddr(&pm_msg->mapped_rem_addr,
618 "query_mapping: Mapped remote sockaddr:");
619query_mapping_response_exit:
620 nlmsg_request->request_done = 1;
621 /* always for found request */
622 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
623 barrier();
624 up(&nlmsg_request->sem);
625 return 0;
626}
627
628/**
629 * iwpm_remote_info_cb - Process remote connecting peer address info, which
630 * the port mapper has received from the connecting peer
631 * @skb: The socket buffer
632 * @cb: Contains the received message (payload and netlink header)
633 *
634 * Stores the IPv4/IPv6 address info in a hash table
635 */
636int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
637{
638 struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
639 struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
640 struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
641 struct iwpm_remote_info *rem_info;
642 const char *msg_type;
643 u8 nl_client;
644 int ret = -EINVAL;
645
646 msg_type = "Remote Mapping info";
647 if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
648 resp_query_policy, nltb, msg_type))
649 return ret;
650
651 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
652 if (!iwpm_valid_client(nl_client)) {
653 pr_info("%s: Invalid port mapper client = %u\n",
654 __func__, nl_client);
655 return ret;
656 }
657 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
658
659 local_sockaddr = (struct sockaddr_storage *)
660 nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
661 remote_sockaddr = (struct sockaddr_storage *)
662 nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
663 mapped_loc_sockaddr = (struct sockaddr_storage *)
664 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
665 mapped_rem_sockaddr = (struct sockaddr_storage *)
666 nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
667
668 if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
669 mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
670 pr_info("%s: Sockaddr family doesn't match the requested one\n",
671 __func__);
672 return ret;
673 }
674 rem_info = kzalloc(sizeof(struct iwpm_remote_info), GFP_ATOMIC);
675 if (!rem_info) {
676 ret = -ENOMEM;
677 return ret;
678 }
679 memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr,
680 sizeof(struct sockaddr_storage));
681 memcpy(&rem_info->remote_sockaddr, remote_sockaddr,
682 sizeof(struct sockaddr_storage));
683 memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr,
684 sizeof(struct sockaddr_storage));
685 rem_info->nl_client = nl_client;
686
687 iwpm_add_remote_info(rem_info);
688
689 iwpm_print_sockaddr(local_sockaddr,
690 "remote_info: Local sockaddr:");
691 iwpm_print_sockaddr(mapped_loc_sockaddr,
692 "remote_info: Mapped local sockaddr:");
693 iwpm_print_sockaddr(remote_sockaddr,
694 "remote_info: Remote sockaddr:");
695 iwpm_print_sockaddr(mapped_rem_sockaddr,
696 "remote_info: Mapped remote sockaddr:");
697 return ret;
698}
699
700/* netlink attribute policy for the received request for mapping info */
701static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
702 [IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING,
703 .len = IWPM_ULIBNAME_SIZE - 1 },
704 [IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 }
705};
706
707/**
708 * iwpm_mapping_info_cb - Process a notification that the userspace
709 * port mapper daemon is started
710 * @skb: The socket buffer
711 * @cb: Contains the received message (payload and netlink header)
712 *
713 * Using the received port mapper pid, send all the local mapping
714 * info records to the userspace port mapper
715 */
716int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
717{
718 struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX];
719 const char *msg_type = "Mapping Info response";
720 u8 nl_client;
721 char *iwpm_name;
722 u16 iwpm_version;
723 int ret = -EINVAL;
724
725 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX,
726 resp_mapinfo_policy, nltb, msg_type)) {
727 pr_info("%s: Unable to parse nlmsg\n", __func__);
728 return ret;
729 }
730 iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]);
731 iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]);
732 if (strcmp(iwpm_ulib_name, iwpm_name) ||
733 iwpm_version < IWPM_UABI_VERSION_MIN) {
734 pr_info("%s: Invalid port mapper name = %s version = %u\n",
735 __func__, iwpm_name, iwpm_version);
736 return ret;
737 }
738 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
739 if (!iwpm_valid_client(nl_client)) {
740 pr_info("%s: Invalid port mapper client = %u\n",
741 __func__, nl_client);
742 return ret;
743 }
744 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
745 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
746 iwpm_user_pid = cb->nlh->nlmsg_pid;
747
748 if (iwpm_ulib_version < IWPM_UABI_VERSION)
749 pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
750 __func__, iwpm_user_pid);
751
752 if (!iwpm_mapinfo_available())
753 return 0;
754 pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
755 __func__, iwpm_user_pid);
756 ret = iwpm_send_mapinfo(nl_client, iwpm_user_pid);
757 return ret;
758}
759
760/* netlink attribute policy for the received mapping info ack */
761static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = {
762 [IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 },
763 [IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 },
764 [IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 }
765};
766
767/**
768 * iwpm_ack_mapping_info_cb - Process the port mapper ack for
769 * the provided local mapping info records
770 * @skb: The socket buffer
771 * @cb: Contains the received message (payload and netlink header)
772 */
773int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
774{
775 struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX];
776 u32 mapinfo_send, mapinfo_ack;
777 const char *msg_type = "Mapping Info Ack";
778
779 if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX,
780 ack_mapinfo_policy, nltb, msg_type))
781 return -EINVAL;
782 mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]);
783 mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]);
784 if (mapinfo_ack != mapinfo_send)
785 pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n",
786 __func__, mapinfo_send, mapinfo_ack);
787 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
788 return 0;
789}
790
791/* netlink attribute policy for the received port mapper error message */
792static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = {
793 [IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 },
794 [IWPM_NLA_ERR_CODE] = { .type = NLA_U16 },
795};
796
797/**
798 * iwpm_mapping_error_cb - Process port mapper notification for error
799 *
800 * @skb: The socket buffer
801 * @cb: Contains the received message (payload and netlink header)
802 */
803int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
804{
805 struct iwpm_nlmsg_request *nlmsg_request = NULL;
806 int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
807 struct nlattr *nltb[IWPM_NLA_ERR_MAX];
808 u32 msg_seq;
809 u16 err_code;
810 const char *msg_type = "Mapping Error Msg";
811
812 if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX,
813 map_error_policy, nltb, msg_type))
814 return -EINVAL;
815
816 msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]);
817 err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]);
818 pr_info("%s: Received msg seq = %u err code = %u client = %d\n",
819 __func__, msg_seq, err_code, nl_client);
820 /* look for nlmsg_request */
821 nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
822 if (!nlmsg_request) {
823 /* not all errors have associated requests */
824 pr_debug("Could not find matching req (seq = %u)\n", msg_seq);
825 return 0;
826 }
827 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
828 nlmsg_request->err_code = err_code;
829 nlmsg_request->request_done = 1;
830 /* always for found request */
831 kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
832 barrier();
833 up(&nlmsg_request->sem);
834 return 0;
835}
836
837/* netlink attribute policy for the received hello request */
838static const struct nla_policy hello_policy[IWPM_NLA_HELLO_MAX] = {
839 [IWPM_NLA_HELLO_ABI_VERSION] = { .type = NLA_U16 }
840};
841
842/**
843 * iwpm_hello_cb - Process a hello message from iwpmd
844 *
845 * @skb: The socket buffer
846 * @cb: Contains the received message (payload and netlink header)
847 *
848 * Using the received port mapper pid, send the kernel's abi_version
849 * after adjusting it to support the iwpmd version.
850 */
851int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb)
852{
853 struct nlattr *nltb[IWPM_NLA_HELLO_MAX];
854 const char *msg_type = "Hello request";
855 u8 nl_client;
856 u16 abi_version;
857 int ret = -EINVAL;
858
859 if (iwpm_parse_nlmsg(cb, IWPM_NLA_HELLO_MAX, hello_policy, nltb,
860 msg_type)) {
861 pr_info("%s: Unable to parse nlmsg\n", __func__);
862 return ret;
863 }
864 abi_version = nla_get_u16(nltb[IWPM_NLA_HELLO_ABI_VERSION]);
865 nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
866 if (!iwpm_valid_client(nl_client)) {
867 pr_info("%s: Invalid port mapper client = %u\n",
868 __func__, nl_client);
869 return ret;
870 }
871 iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
872 atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
873 iwpm_ulib_version = min_t(u16, IWPM_UABI_VERSION, abi_version);
874 pr_debug("Using ABI version %u\n", iwpm_ulib_version);
875 iwpm_user_pid = cb->nlh->nlmsg_pid;
876 ret = iwpm_send_hello(nl_client, iwpm_user_pid, iwpm_ulib_version);
877 return ret;
878}