Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
0655f6a8 | 4 | * Copyright (c) 1996-2006, 2013-2014, Ericsson AB |
e4d050cb | 5 | * Copyright (c) 2004-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
7f9f95d9 | 37 | #include <net/sock.h> |
b97bf3fd PL |
38 | #include "core.h" |
39 | #include "config.h" | |
b97bf3fd | 40 | #include "bearer.h" |
0655f6a8 | 41 | #include "link.h" |
b97bf3fd | 42 | #include "discover.h" |
1da46568 | 43 | #include "bcast.h" |
b97bf3fd | 44 | |
a29a194a | 45 | #define MAX_ADDR_STR 60 |
b97bf3fd | 46 | |
ef72a7e0 | 47 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
48 | ð_media_info, |
49 | #ifdef CONFIG_TIPC_MEDIA_IB | |
50 | &ib_media_info, | |
51 | #endif | |
52 | NULL | |
53 | }; | |
b97bf3fd | 54 | |
0655f6a8 RA |
55 | static const struct nla_policy |
56 | tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = { | |
57 | [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC }, | |
58 | [TIPC_NLA_BEARER_NAME] = { | |
59 | .type = NLA_STRING, | |
60 | .len = TIPC_MAX_BEARER_NAME | |
61 | }, | |
62 | [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED }, | |
63 | [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 } | |
64 | }; | |
65 | ||
46f15c67 RA |
66 | static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = { |
67 | [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC }, | |
68 | [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING }, | |
69 | [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED } | |
70 | }; | |
71 | ||
f2f9800d YX |
72 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr, |
73 | bool shutting_down); | |
3a777ff8 | 74 | |
b97bf3fd | 75 | /** |
5c216e1d | 76 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 77 | */ |
358a0d1c | 78 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 79 | { |
b97bf3fd PL |
80 | u32 i; |
81 | ||
ef72a7e0 JPM |
82 | for (i = 0; media_info_array[i] != NULL; i++) { |
83 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 84 | break; |
b97bf3fd | 85 | } |
ef72a7e0 | 86 | return media_info_array[i]; |
b97bf3fd PL |
87 | } |
88 | ||
c79be454 AS |
89 | /** |
90 | * media_find_id - locates specified media object by type identifier | |
91 | */ | |
358a0d1c | 92 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
93 | { |
94 | u32 i; | |
95 | ||
ef72a7e0 JPM |
96 | for (i = 0; media_info_array[i] != NULL; i++) { |
97 | if (media_info_array[i]->type_id == type) | |
5702dbab | 98 | break; |
c79be454 | 99 | } |
ef72a7e0 | 100 | return media_info_array[i]; |
b97bf3fd PL |
101 | } |
102 | ||
103 | /** | |
4323add6 | 104 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 105 | */ |
dc1aed37 | 106 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 107 | { |
c61b666e | 108 | char addr_str[MAX_ADDR_STR]; |
358a0d1c | 109 | struct tipc_media *m_ptr; |
dc1aed37 | 110 | int ret; |
b97bf3fd | 111 | |
3d749a6a | 112 | m_ptr = media_find_id(a->media_id); |
b97bf3fd | 113 | |
c61b666e | 114 | if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str))) |
dc1aed37 | 115 | ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str); |
c61b666e | 116 | else { |
c61b666e | 117 | u32 i; |
b97bf3fd | 118 | |
dc1aed37 | 119 | ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 120 | for (i = 0; i < sizeof(a->value); i++) |
dc1aed37 EH |
121 | ret += tipc_snprintf(buf - ret, len + ret, |
122 | "-%02x", a->value[i]); | |
b97bf3fd PL |
123 | } |
124 | } | |
125 | ||
126 | /** | |
4323add6 | 127 | * tipc_media_get_names - record names of registered media in buffer |
b97bf3fd | 128 | */ |
4323add6 | 129 | struct sk_buff *tipc_media_get_names(void) |
b97bf3fd PL |
130 | { |
131 | struct sk_buff *buf; | |
b97bf3fd PL |
132 | int i; |
133 | ||
4323add6 | 134 | buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME)); |
b97bf3fd PL |
135 | if (!buf) |
136 | return NULL; | |
137 | ||
ef72a7e0 | 138 | for (i = 0; media_info_array[i] != NULL; i++) { |
a31abe8d | 139 | tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME, |
ef72a7e0 JPM |
140 | media_info_array[i]->name, |
141 | strlen(media_info_array[i]->name) + 1); | |
b97bf3fd | 142 | } |
b97bf3fd PL |
143 | return buf; |
144 | } | |
145 | ||
146 | /** | |
147 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
148 | * @name: ptr to bearer name string |
149 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 150 | * |
b97bf3fd PL |
151 | * Returns 1 if bearer name is valid, otherwise 0. |
152 | */ | |
c4307285 | 153 | static int bearer_name_validate(const char *name, |
f19765f4 | 154 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
155 | { |
156 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
157 | char *media_name; | |
158 | char *if_name; | |
159 | u32 media_len; | |
160 | u32 if_len; | |
161 | ||
162 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
163 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
164 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
165 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
166 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
167 | return 0; | |
168 | ||
169 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 170 | media_name = name_copy; |
2db9983a AS |
171 | if_name = strchr(media_name, ':'); |
172 | if (if_name == NULL) | |
b97bf3fd PL |
173 | return 0; |
174 | *(if_name++) = 0; | |
175 | media_len = if_name - media_name; | |
176 | if_len = strlen(if_name) + 1; | |
177 | ||
178 | /* validate component parts of bearer name */ | |
c4307285 | 179 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 180 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
181 | return 0; |
182 | ||
183 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
184 | if (name_parts) { |
185 | strcpy(name_parts->media_name, media_name); | |
186 | strcpy(name_parts->if_name, if_name); | |
187 | } | |
188 | return 1; | |
189 | } | |
190 | ||
191 | /** | |
5c216e1d | 192 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 193 | */ |
7f9f95d9 | 194 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 195 | { |
7f9f95d9 | 196 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 197 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
198 | u32 i; |
199 | ||
3874ccbb | 200 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 201 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 202 | if (b_ptr && (!strcmp(b_ptr->name, name))) |
b97bf3fd PL |
203 | return b_ptr; |
204 | } | |
1fc54d8f | 205 | return NULL; |
b97bf3fd PL |
206 | } |
207 | ||
208 | /** | |
4323add6 | 209 | * tipc_bearer_get_names - record names of bearers in buffer |
b97bf3fd | 210 | */ |
7f9f95d9 | 211 | struct sk_buff *tipc_bearer_get_names(struct net *net) |
b97bf3fd | 212 | { |
7f9f95d9 | 213 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd | 214 | struct sk_buff *buf; |
ef72a7e0 | 215 | struct tipc_bearer *b; |
b97bf3fd PL |
216 | int i, j; |
217 | ||
4323add6 | 218 | buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME)); |
b97bf3fd PL |
219 | if (!buf) |
220 | return NULL; | |
221 | ||
ef72a7e0 | 222 | for (i = 0; media_info_array[i] != NULL; i++) { |
b97bf3fd | 223 | for (j = 0; j < MAX_BEARERS; j++) { |
7f9f95d9 | 224 | b = rtnl_dereference(tn->bearer_list[j]); |
3874ccbb YX |
225 | if (!b) |
226 | continue; | |
f47de12b | 227 | if (b->media == media_info_array[i]) { |
c4307285 | 228 | tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME, |
ef72a7e0 JPM |
229 | b->name, |
230 | strlen(b->name) + 1); | |
b97bf3fd PL |
231 | } |
232 | } | |
233 | } | |
b97bf3fd PL |
234 | return buf; |
235 | } | |
236 | ||
7f9f95d9 | 237 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 238 | { |
7f9f95d9 | 239 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
240 | struct tipc_bearer *b_ptr; |
241 | ||
242 | rcu_read_lock(); | |
7f9f95d9 | 243 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 244 | if (b_ptr) { |
7f9f95d9 | 245 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true); |
7a2f7d18 YX |
246 | tipc_disc_add_dest(b_ptr->link_req); |
247 | } | |
248 | rcu_read_unlock(); | |
b97bf3fd PL |
249 | } |
250 | ||
7f9f95d9 | 251 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 252 | { |
7f9f95d9 | 253 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
254 | struct tipc_bearer *b_ptr; |
255 | ||
256 | rcu_read_lock(); | |
7f9f95d9 | 257 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 258 | if (b_ptr) { |
7f9f95d9 | 259 | tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false); |
7a2f7d18 YX |
260 | tipc_disc_remove_dest(b_ptr->link_req); |
261 | } | |
262 | rcu_read_unlock(); | |
b97bf3fd PL |
263 | } |
264 | ||
b97bf3fd PL |
265 | /** |
266 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 267 | */ |
c93d3baa YX |
268 | int tipc_enable_bearer(struct net *net, const char *name, u32 disc_domain, |
269 | u32 priority) | |
b97bf3fd | 270 | { |
7f9f95d9 | 271 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2d627b92 | 272 | struct tipc_bearer *b_ptr; |
358a0d1c | 273 | struct tipc_media *m_ptr; |
f19765f4 | 274 | struct tipc_bearer_names b_names; |
b97bf3fd PL |
275 | char addr_string[16]; |
276 | u32 bearer_id; | |
277 | u32 with_this_prio; | |
278 | u32 i; | |
279 | int res = -EINVAL; | |
280 | ||
b58343f9 | 281 | if (!tipc_own_addr) { |
2cf8aa19 EH |
282 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
283 | name); | |
b97bf3fd | 284 | return -ENOPROTOOPT; |
a10bd924 | 285 | } |
f19765f4 | 286 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 287 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 288 | return -EINVAL; |
a10bd924 | 289 | } |
66e019a6 AS |
290 | if (tipc_addr_domain_valid(disc_domain) && |
291 | (disc_domain != tipc_own_addr)) { | |
292 | if (tipc_in_scope(disc_domain, tipc_own_addr)) { | |
293 | disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK; | |
294 | res = 0; /* accept any node in own cluster */ | |
336ebf5b | 295 | } else if (in_own_cluster_exact(disc_domain)) |
66e019a6 AS |
296 | res = 0; /* accept specified node in own cluster */ |
297 | } | |
298 | if (res) { | |
2cf8aa19 EH |
299 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
300 | name); | |
a10bd924 AS |
301 | return -EINVAL; |
302 | } | |
9efde4a0 | 303 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 304 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 305 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 306 | return -EINVAL; |
a10bd924 | 307 | } |
b97bf3fd | 308 | |
f19765f4 | 309 | m_ptr = tipc_media_find(b_names.media_name); |
b97bf3fd | 310 | if (!m_ptr) { |
2cf8aa19 EH |
311 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
312 | name, b_names.media_name); | |
7216cd94 | 313 | return -EINVAL; |
b97bf3fd | 314 | } |
16cb4b33 PL |
315 | |
316 | if (priority == TIPC_MEDIA_LINK_PRI) | |
b97bf3fd PL |
317 | priority = m_ptr->priority; |
318 | ||
319 | restart: | |
320 | bearer_id = MAX_BEARERS; | |
321 | with_this_prio = 1; | |
322 | for (i = MAX_BEARERS; i-- != 0; ) { | |
7f9f95d9 | 323 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 324 | if (!b_ptr) { |
b97bf3fd PL |
325 | bearer_id = i; |
326 | continue; | |
327 | } | |
3874ccbb | 328 | if (!strcmp(name, b_ptr->name)) { |
2cf8aa19 EH |
329 | pr_warn("Bearer <%s> rejected, already enabled\n", |
330 | name); | |
7216cd94 | 331 | return -EINVAL; |
b97bf3fd | 332 | } |
3874ccbb | 333 | if ((b_ptr->priority == priority) && |
b97bf3fd PL |
334 | (++with_this_prio > 2)) { |
335 | if (priority-- == 0) { | |
2cf8aa19 EH |
336 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
337 | name); | |
7216cd94 | 338 | return -EINVAL; |
b97bf3fd | 339 | } |
2cf8aa19 EH |
340 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
341 | name, priority + 1, priority); | |
b97bf3fd PL |
342 | goto restart; |
343 | } | |
344 | } | |
345 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
346 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
347 | name, MAX_BEARERS); | |
7216cd94 | 348 | return -EINVAL; |
b97bf3fd PL |
349 | } |
350 | ||
3874ccbb | 351 | b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC); |
7216cd94 YX |
352 | if (!b_ptr) |
353 | return -ENOMEM; | |
354 | ||
2d627b92 | 355 | strcpy(b_ptr->name, name); |
e4d050cb | 356 | b_ptr->media = m_ptr; |
7f9f95d9 | 357 | res = m_ptr->enable_media(net, b_ptr); |
b97bf3fd | 358 | if (res) { |
2cf8aa19 EH |
359 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
360 | name, -res); | |
7216cd94 | 361 | return -EINVAL; |
b97bf3fd PL |
362 | } |
363 | ||
364 | b_ptr->identity = bearer_id; | |
5c216e1d AS |
365 | b_ptr->tolerance = m_ptr->tolerance; |
366 | b_ptr->window = m_ptr->window; | |
a21a584d | 367 | b_ptr->domain = disc_domain; |
b97bf3fd | 368 | b_ptr->net_plane = bearer_id + 'A'; |
b97bf3fd | 369 | b_ptr->priority = priority; |
3a777ff8 | 370 | |
c93d3baa | 371 | res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr); |
3a777ff8 | 372 | if (res) { |
f2f9800d | 373 | bearer_disable(net, b_ptr, false); |
2cf8aa19 EH |
374 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
375 | name); | |
7216cd94 | 376 | return -EINVAL; |
3a777ff8 | 377 | } |
3874ccbb | 378 | |
7f9f95d9 | 379 | rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr); |
3874ccbb | 380 | |
2cf8aa19 EH |
381 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
382 | name, | |
383 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
384 | return res; |
385 | } | |
386 | ||
387 | /** | |
512137ee | 388 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 389 | */ |
c93d3baa | 390 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr) |
b97bf3fd | 391 | { |
512137ee | 392 | pr_info("Resetting bearer <%s>\n", b_ptr->name); |
f2f9800d | 393 | tipc_link_reset_list(net, b_ptr->identity); |
c93d3baa | 394 | tipc_disc_reset(net, b_ptr); |
0e35fd5e | 395 | return 0; |
b97bf3fd PL |
396 | } |
397 | ||
398 | /** | |
617d3c7a | 399 | * bearer_disable |
c4307285 | 400 | * |
7216cd94 | 401 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 402 | */ |
f2f9800d YX |
403 | static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr, |
404 | bool shutting_down) | |
b97bf3fd | 405 | { |
7f9f95d9 | 406 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb YX |
407 | u32 i; |
408 | ||
2cf8aa19 | 409 | pr_info("Disabling bearer <%s>\n", b_ptr->name); |
4babbaa8 | 410 | b_ptr->media->disable_media(b_ptr); |
d4cca39d | 411 | |
f2f9800d | 412 | tipc_link_delete_list(net, b_ptr->identity, shutting_down); |
a8304529 YX |
413 | if (b_ptr->link_req) |
414 | tipc_disc_delete(b_ptr->link_req); | |
3874ccbb YX |
415 | |
416 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 YX |
417 | if (b_ptr == rtnl_dereference(tn->bearer_list[i])) { |
418 | RCU_INIT_POINTER(tn->bearer_list[i], NULL); | |
3874ccbb YX |
419 | break; |
420 | } | |
421 | } | |
f8322dfc | 422 | kfree_rcu(b_ptr, rcu); |
b97bf3fd PL |
423 | } |
424 | ||
f2f9800d | 425 | int tipc_disable_bearer(struct net *net, const char *name) |
b97bf3fd | 426 | { |
2d627b92 | 427 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
428 | int res; |
429 | ||
7f9f95d9 | 430 | b_ptr = tipc_bearer_find(net, name); |
ccc901ee | 431 | if (b_ptr == NULL) { |
2cf8aa19 | 432 | pr_warn("Attempt to disable unknown bearer <%s>\n", name); |
ccc901ee | 433 | res = -EINVAL; |
28cc937e | 434 | } else { |
f2f9800d | 435 | bearer_disable(net, b_ptr, false); |
28cc937e AS |
436 | res = 0; |
437 | } | |
b97bf3fd PL |
438 | return res; |
439 | } | |
440 | ||
7f9f95d9 | 441 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b) |
e4d050cb YX |
442 | { |
443 | struct net_device *dev; | |
444 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
445 | ||
446 | /* Find device with specified name */ | |
7f9f95d9 | 447 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
448 | if (!dev) |
449 | return -ENODEV; | |
450 | ||
38504c28 | 451 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 452 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 453 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
454 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
455 | b->bcast_addr.media_id = b->media->type_id; | |
456 | b->bcast_addr.broadcast = 1; | |
457 | b->mtu = dev->mtu; | |
38504c28 | 458 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
459 | rcu_assign_pointer(dev->tipc_ptr, b); |
460 | return 0; | |
461 | } | |
462 | ||
38504c28 | 463 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 464 | * |
38504c28 | 465 | * Mark L2 bearer as inactive so that incoming buffers are thrown away, |
e4d050cb YX |
466 | * then get worker thread to complete bearer cleanup. (Can't do cleanup |
467 | * here because cleanup code needs to sleep and caller holds spinlocks.) | |
468 | */ | |
469 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
470 | { | |
2231c5af YX |
471 | struct net_device *dev; |
472 | ||
473 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
474 | RCU_INIT_POINTER(b->media_ptr, NULL); | |
e4d050cb | 475 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 476 | synchronize_net(); |
e4d050cb YX |
477 | dev_put(dev); |
478 | } | |
479 | ||
480 | /** | |
38504c28 | 481 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
e4d050cb | 482 | * @buf: the packet to be sent |
963a1855 | 483 | * @b_ptr: the bearer through which the packet is to be sent |
e4d050cb YX |
484 | * @dest: peer destination address |
485 | */ | |
1da46568 YX |
486 | int tipc_l2_send_msg(struct net *net, struct sk_buff *buf, |
487 | struct tipc_bearer *b, struct tipc_media_addr *dest) | |
e4d050cb YX |
488 | { |
489 | struct sk_buff *clone; | |
2231c5af | 490 | struct net_device *dev; |
e4d050cb | 491 | int delta; |
2231c5af YX |
492 | |
493 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
494 | if (!dev) | |
495 | return 0; | |
e4d050cb YX |
496 | |
497 | clone = skb_clone(buf, GFP_ATOMIC); | |
498 | if (!clone) | |
499 | return 0; | |
500 | ||
501 | delta = dev->hard_header_len - skb_headroom(buf); | |
502 | if ((delta > 0) && | |
503 | pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) { | |
504 | kfree_skb(clone); | |
505 | return 0; | |
506 | } | |
507 | ||
508 | skb_reset_network_header(clone); | |
509 | clone->dev = dev; | |
510 | clone->protocol = htons(ETH_P_TIPC); | |
511 | dev_hard_header(clone, dev, ETH_P_TIPC, dest->value, | |
512 | dev->dev_addr, clone->len); | |
513 | dev_queue_xmit(clone); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | /* tipc_bearer_send- sends buffer to destination over bearer | |
518 | * | |
519 | * IMPORTANT: | |
520 | * The media send routine must not alter the buffer being passed in | |
521 | * as it may be needed for later retransmission! | |
522 | */ | |
7f9f95d9 | 523 | void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf, |
e4d050cb YX |
524 | struct tipc_media_addr *dest) |
525 | { | |
7f9f95d9 | 526 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7a2f7d18 YX |
527 | struct tipc_bearer *b_ptr; |
528 | ||
529 | rcu_read_lock(); | |
7f9f95d9 | 530 | b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
7a2f7d18 | 531 | if (likely(b_ptr)) |
1da46568 | 532 | b_ptr->media->send_msg(net, buf, b_ptr, dest); |
7a2f7d18 | 533 | rcu_read_unlock(); |
e4d050cb YX |
534 | } |
535 | ||
6e967adf YX |
536 | /** |
537 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
538 | * @buf: the received packet | |
539 | * @dev: the net device that the packet was received on | |
540 | * @pt: the packet_type structure which was used to register this handler | |
541 | * @orig_dev: the original receive net device in case the device is a bond | |
542 | * | |
543 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
544 | * ignores packets sent using interface multicast, and traffic sent to other | |
545 | * nodes (which can happen if interface is running in promiscuous mode). | |
546 | */ | |
547 | static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev, | |
548 | struct packet_type *pt, struct net_device *orig_dev) | |
549 | { | |
550 | struct tipc_bearer *b_ptr; | |
551 | ||
6e967adf | 552 | rcu_read_lock(); |
ca07fb07 | 553 | b_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
6e967adf YX |
554 | if (likely(b_ptr)) { |
555 | if (likely(buf->pkt_type <= PACKET_BROADCAST)) { | |
556 | buf->next = NULL; | |
c93d3baa | 557 | tipc_rcv(dev_net(dev), buf, b_ptr); |
6e967adf YX |
558 | rcu_read_unlock(); |
559 | return NET_RX_SUCCESS; | |
560 | } | |
561 | } | |
562 | rcu_read_unlock(); | |
563 | ||
564 | kfree_skb(buf); | |
565 | return NET_RX_DROP; | |
566 | } | |
567 | ||
568 | /** | |
569 | * tipc_l2_device_event - handle device events from network device | |
570 | * @nb: the context of the notification | |
571 | * @evt: the type of event | |
572 | * @ptr: the net device that the event was on | |
573 | * | |
574 | * This function is called by the Ethernet driver in case of link | |
575 | * change event. | |
576 | */ | |
577 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
578 | void *ptr) | |
579 | { | |
6e967adf | 580 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa YX |
581 | struct net *net = dev_net(dev); |
582 | struct tipc_bearer *b_ptr; | |
6e967adf | 583 | |
ca07fb07 YX |
584 | b_ptr = rtnl_dereference(dev->tipc_ptr); |
585 | if (!b_ptr) | |
6e967adf | 586 | return NOTIFY_DONE; |
6e967adf YX |
587 | |
588 | b_ptr->mtu = dev->mtu; | |
589 | ||
590 | switch (evt) { | |
591 | case NETDEV_CHANGE: | |
592 | if (netif_carrier_ok(dev)) | |
593 | break; | |
594 | case NETDEV_DOWN: | |
595 | case NETDEV_CHANGEMTU: | |
c93d3baa | 596 | tipc_reset_bearer(net, b_ptr); |
a21a584d | 597 | break; |
6e967adf | 598 | case NETDEV_CHANGEADDR: |
38504c28 | 599 | b_ptr->media->raw2addr(b_ptr, &b_ptr->addr, |
a21a584d | 600 | (char *)dev->dev_addr); |
c93d3baa | 601 | tipc_reset_bearer(net, b_ptr); |
6e967adf YX |
602 | break; |
603 | case NETDEV_UNREGISTER: | |
604 | case NETDEV_CHANGENAME: | |
f2f9800d | 605 | bearer_disable(dev_net(dev), b_ptr, false); |
6e967adf YX |
606 | break; |
607 | } | |
6e967adf YX |
608 | return NOTIFY_OK; |
609 | } | |
610 | ||
611 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 612 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
613 | .func = tipc_l2_rcv_msg, |
614 | }; | |
615 | ||
616 | static struct notifier_block notifier = { | |
617 | .notifier_call = tipc_l2_device_event, | |
618 | .priority = 0, | |
619 | }; | |
620 | ||
621 | int tipc_bearer_setup(void) | |
622 | { | |
970122fd YX |
623 | int err; |
624 | ||
625 | err = register_netdevice_notifier(¬ifier); | |
626 | if (err) | |
627 | return err; | |
6e967adf | 628 | dev_add_pack(&tipc_packet_type); |
970122fd | 629 | return 0; |
6e967adf YX |
630 | } |
631 | ||
632 | void tipc_bearer_cleanup(void) | |
633 | { | |
634 | unregister_netdevice_notifier(¬ifier); | |
635 | dev_remove_pack(&tipc_packet_type); | |
636 | } | |
b97bf3fd | 637 | |
f2f9800d | 638 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 639 | { |
7f9f95d9 | 640 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3874ccbb | 641 | struct tipc_bearer *b_ptr; |
b97bf3fd PL |
642 | u32 i; |
643 | ||
b97bf3fd | 644 | for (i = 0; i < MAX_BEARERS; i++) { |
7f9f95d9 | 645 | b_ptr = rtnl_dereference(tn->bearer_list[i]); |
f47de12b | 646 | if (b_ptr) { |
f2f9800d | 647 | bearer_disable(net, b_ptr, true); |
7f9f95d9 | 648 | tn->bearer_list[i] = NULL; |
3874ccbb | 649 | } |
b97bf3fd | 650 | } |
b97bf3fd | 651 | } |
0655f6a8 | 652 | |
35b9dd76 | 653 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 RA |
654 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
655 | struct tipc_bearer *bearer) | |
35b9dd76 RA |
656 | { |
657 | void *hdr; | |
658 | struct nlattr *attrs; | |
659 | struct nlattr *prop; | |
660 | ||
661 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, | |
662 | NLM_F_MULTI, TIPC_NL_BEARER_GET); | |
663 | if (!hdr) | |
664 | return -EMSGSIZE; | |
665 | ||
666 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
667 | if (!attrs) | |
668 | goto msg_full; | |
669 | ||
670 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
671 | goto attr_msg_full; | |
672 | ||
673 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
674 | if (!prop) | |
675 | goto prop_msg_full; | |
676 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
677 | goto prop_msg_full; | |
678 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
679 | goto prop_msg_full; | |
680 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
681 | goto prop_msg_full; | |
682 | ||
683 | nla_nest_end(msg->skb, prop); | |
684 | nla_nest_end(msg->skb, attrs); | |
685 | genlmsg_end(msg->skb, hdr); | |
686 | ||
687 | return 0; | |
688 | ||
689 | prop_msg_full: | |
690 | nla_nest_cancel(msg->skb, prop); | |
691 | attr_msg_full: | |
692 | nla_nest_cancel(msg->skb, attrs); | |
693 | msg_full: | |
694 | genlmsg_cancel(msg->skb, hdr); | |
695 | ||
696 | return -EMSGSIZE; | |
697 | } | |
698 | ||
699 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
700 | { | |
701 | int err; | |
702 | int i = cb->args[0]; | |
703 | struct tipc_bearer *bearer; | |
704 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
705 | struct net *net = sock_net(skb->sk); |
706 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
707 | |
708 | if (i == MAX_BEARERS) | |
709 | return 0; | |
710 | ||
711 | msg.skb = skb; | |
712 | msg.portid = NETLINK_CB(cb->skb).portid; | |
713 | msg.seq = cb->nlh->nlmsg_seq; | |
714 | ||
715 | rtnl_lock(); | |
716 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 717 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
718 | if (!bearer) |
719 | continue; | |
720 | ||
721 | err = __tipc_nl_add_bearer(&msg, bearer); | |
722 | if (err) | |
723 | break; | |
724 | } | |
725 | rtnl_unlock(); | |
726 | ||
727 | cb->args[0] = i; | |
728 | return skb->len; | |
729 | } | |
730 | ||
731 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
732 | { | |
733 | int err; | |
734 | char *name; | |
735 | struct sk_buff *rep; | |
736 | struct tipc_bearer *bearer; | |
737 | struct tipc_nl_msg msg; | |
738 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 739 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
740 | |
741 | if (!info->attrs[TIPC_NLA_BEARER]) | |
742 | return -EINVAL; | |
743 | ||
744 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
745 | info->attrs[TIPC_NLA_BEARER], | |
746 | tipc_nl_bearer_policy); | |
747 | if (err) | |
748 | return err; | |
749 | ||
750 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
751 | return -EINVAL; | |
752 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
753 | ||
754 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
755 | if (!rep) | |
756 | return -ENOMEM; | |
757 | ||
758 | msg.skb = rep; | |
759 | msg.portid = info->snd_portid; | |
760 | msg.seq = info->snd_seq; | |
761 | ||
762 | rtnl_lock(); | |
7f9f95d9 | 763 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
764 | if (!bearer) { |
765 | err = -EINVAL; | |
766 | goto err_out; | |
767 | } | |
768 | ||
769 | err = __tipc_nl_add_bearer(&msg, bearer); | |
770 | if (err) | |
771 | goto err_out; | |
772 | rtnl_unlock(); | |
773 | ||
774 | return genlmsg_reply(rep, info); | |
775 | err_out: | |
776 | rtnl_unlock(); | |
777 | nlmsg_free(rep); | |
778 | ||
779 | return err; | |
780 | } | |
781 | ||
0655f6a8 RA |
782 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
783 | { | |
784 | int err; | |
785 | char *name; | |
786 | struct tipc_bearer *bearer; | |
787 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
f2f9800d | 788 | struct net *net = genl_info_net(info); |
0655f6a8 RA |
789 | |
790 | if (!info->attrs[TIPC_NLA_BEARER]) | |
791 | return -EINVAL; | |
792 | ||
793 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
794 | info->attrs[TIPC_NLA_BEARER], | |
795 | tipc_nl_bearer_policy); | |
796 | if (err) | |
797 | return err; | |
798 | ||
799 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
800 | return -EINVAL; | |
801 | ||
802 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
803 | ||
804 | rtnl_lock(); | |
7f9f95d9 | 805 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
806 | if (!bearer) { |
807 | rtnl_unlock(); | |
808 | return -EINVAL; | |
809 | } | |
810 | ||
f2f9800d | 811 | bearer_disable(net, bearer, false); |
0655f6a8 RA |
812 | rtnl_unlock(); |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
818 | { | |
c93d3baa | 819 | struct net *net = genl_info_net(info); |
0655f6a8 RA |
820 | int err; |
821 | char *bearer; | |
822 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
823 | u32 domain; | |
824 | u32 prio; | |
825 | ||
826 | prio = TIPC_MEDIA_LINK_PRI; | |
827 | domain = tipc_own_addr & TIPC_CLUSTER_MASK; | |
828 | ||
829 | if (!info->attrs[TIPC_NLA_BEARER]) | |
830 | return -EINVAL; | |
831 | ||
832 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
833 | info->attrs[TIPC_NLA_BEARER], | |
834 | tipc_nl_bearer_policy); | |
835 | if (err) | |
836 | return err; | |
837 | ||
838 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
839 | return -EINVAL; | |
840 | ||
841 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
842 | ||
843 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
844 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
845 | ||
846 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
847 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
848 | ||
849 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
850 | props); | |
851 | if (err) | |
852 | return err; | |
853 | ||
854 | if (props[TIPC_NLA_PROP_PRIO]) | |
855 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
856 | } | |
857 | ||
858 | rtnl_lock(); | |
c93d3baa | 859 | err = tipc_enable_bearer(net, bearer, domain, prio); |
0655f6a8 RA |
860 | if (err) { |
861 | rtnl_unlock(); | |
862 | return err; | |
863 | } | |
864 | rtnl_unlock(); | |
865 | ||
866 | return 0; | |
867 | } | |
315c00bc RA |
868 | |
869 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
870 | { | |
871 | int err; | |
872 | char *name; | |
873 | struct tipc_bearer *b; | |
874 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 875 | struct net *net = genl_info_net(info); |
315c00bc RA |
876 | |
877 | if (!info->attrs[TIPC_NLA_BEARER]) | |
878 | return -EINVAL; | |
879 | ||
880 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
881 | info->attrs[TIPC_NLA_BEARER], | |
882 | tipc_nl_bearer_policy); | |
883 | if (err) | |
884 | return err; | |
885 | ||
886 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
887 | return -EINVAL; | |
888 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
889 | ||
890 | rtnl_lock(); | |
7f9f95d9 | 891 | b = tipc_bearer_find(net, name); |
315c00bc RA |
892 | if (!b) { |
893 | rtnl_unlock(); | |
894 | return -EINVAL; | |
895 | } | |
896 | ||
897 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
898 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
899 | ||
900 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
901 | props); | |
902 | if (err) { | |
903 | rtnl_unlock(); | |
904 | return err; | |
905 | } | |
906 | ||
907 | if (props[TIPC_NLA_PROP_TOL]) | |
908 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
909 | if (props[TIPC_NLA_PROP_PRIO]) | |
910 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
911 | if (props[TIPC_NLA_PROP_WIN]) | |
912 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
913 | } | |
914 | rtnl_unlock(); | |
915 | ||
916 | return 0; | |
917 | } | |
46f15c67 | 918 | |
d8182804 RA |
919 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
920 | struct tipc_media *media) | |
46f15c67 RA |
921 | { |
922 | void *hdr; | |
923 | struct nlattr *attrs; | |
924 | struct nlattr *prop; | |
925 | ||
926 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family, | |
927 | NLM_F_MULTI, TIPC_NL_MEDIA_GET); | |
928 | if (!hdr) | |
929 | return -EMSGSIZE; | |
930 | ||
931 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
932 | if (!attrs) | |
933 | goto msg_full; | |
934 | ||
935 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
936 | goto attr_msg_full; | |
937 | ||
938 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
939 | if (!prop) | |
940 | goto prop_msg_full; | |
941 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
942 | goto prop_msg_full; | |
943 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
944 | goto prop_msg_full; | |
945 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
946 | goto prop_msg_full; | |
947 | ||
948 | nla_nest_end(msg->skb, prop); | |
949 | nla_nest_end(msg->skb, attrs); | |
950 | genlmsg_end(msg->skb, hdr); | |
951 | ||
952 | return 0; | |
953 | ||
954 | prop_msg_full: | |
955 | nla_nest_cancel(msg->skb, prop); | |
956 | attr_msg_full: | |
957 | nla_nest_cancel(msg->skb, attrs); | |
958 | msg_full: | |
959 | genlmsg_cancel(msg->skb, hdr); | |
960 | ||
961 | return -EMSGSIZE; | |
962 | } | |
963 | ||
964 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
965 | { | |
966 | int err; | |
967 | int i = cb->args[0]; | |
968 | struct tipc_nl_msg msg; | |
969 | ||
970 | if (i == MAX_MEDIA) | |
971 | return 0; | |
972 | ||
973 | msg.skb = skb; | |
974 | msg.portid = NETLINK_CB(cb->skb).portid; | |
975 | msg.seq = cb->nlh->nlmsg_seq; | |
976 | ||
977 | rtnl_lock(); | |
978 | for (; media_info_array[i] != NULL; i++) { | |
979 | err = __tipc_nl_add_media(&msg, media_info_array[i]); | |
980 | if (err) | |
981 | break; | |
982 | } | |
983 | rtnl_unlock(); | |
984 | ||
985 | cb->args[0] = i; | |
986 | return skb->len; | |
987 | } | |
988 | ||
989 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
990 | { | |
991 | int err; | |
992 | char *name; | |
993 | struct tipc_nl_msg msg; | |
994 | struct tipc_media *media; | |
995 | struct sk_buff *rep; | |
996 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
997 | ||
998 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
999 | return -EINVAL; | |
1000 | ||
1001 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1002 | info->attrs[TIPC_NLA_MEDIA], | |
1003 | tipc_nl_media_policy); | |
1004 | if (err) | |
1005 | return err; | |
1006 | ||
1007 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1008 | return -EINVAL; | |
1009 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1010 | ||
1011 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1012 | if (!rep) | |
1013 | return -ENOMEM; | |
1014 | ||
1015 | msg.skb = rep; | |
1016 | msg.portid = info->snd_portid; | |
1017 | msg.seq = info->snd_seq; | |
1018 | ||
1019 | rtnl_lock(); | |
1020 | media = tipc_media_find(name); | |
1021 | if (!media) { | |
1022 | err = -EINVAL; | |
1023 | goto err_out; | |
1024 | } | |
1025 | ||
1026 | err = __tipc_nl_add_media(&msg, media); | |
1027 | if (err) | |
1028 | goto err_out; | |
1029 | rtnl_unlock(); | |
1030 | ||
1031 | return genlmsg_reply(rep, info); | |
1032 | err_out: | |
1033 | rtnl_unlock(); | |
1034 | nlmsg_free(rep); | |
1035 | ||
1036 | return err; | |
1037 | } | |
1e55417d RA |
1038 | |
1039 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1040 | { | |
1041 | int err; | |
1042 | char *name; | |
1043 | struct tipc_media *m; | |
1044 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1045 | ||
1046 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1047 | return -EINVAL; | |
1048 | ||
1049 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1050 | info->attrs[TIPC_NLA_MEDIA], | |
1051 | tipc_nl_media_policy); | |
1052 | ||
1053 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1054 | return -EINVAL; | |
1055 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1056 | ||
1057 | rtnl_lock(); | |
1058 | m = tipc_media_find(name); | |
1059 | if (!m) { | |
1060 | rtnl_unlock(); | |
1061 | return -EINVAL; | |
1062 | } | |
1063 | ||
1064 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1065 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1066 | ||
1067 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1068 | props); | |
1069 | if (err) { | |
1070 | rtnl_unlock(); | |
1071 | return err; | |
1072 | } | |
1073 | ||
1074 | if (props[TIPC_NLA_PROP_TOL]) | |
1075 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1076 | if (props[TIPC_NLA_PROP_PRIO]) | |
1077 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1078 | if (props[TIPC_NLA_PROP_WIN]) | |
1079 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1080 | } | |
1081 | rtnl_unlock(); | |
1082 | ||
1083 | return 0; | |
1084 | } |