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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.c: TIPC bearer code | |
c4307285 | 3 | * |
35c55c98 | 4 | * Copyright (c) 1996-2006, 2013-2016, 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 | 38 | #include "core.h" |
b97bf3fd | 39 | #include "bearer.h" |
0655f6a8 | 40 | #include "link.h" |
b97bf3fd | 41 | #include "discover.h" |
35c55c98 | 42 | #include "monitor.h" |
1da46568 | 43 | #include "bcast.h" |
49cc66ea | 44 | #include "netlink.h" |
b97bf3fd | 45 | |
a29a194a | 46 | #define MAX_ADDR_STR 60 |
b97bf3fd | 47 | |
ef72a7e0 | 48 | static struct tipc_media * const media_info_array[] = { |
5702dbab JPM |
49 | ð_media_info, |
50 | #ifdef CONFIG_TIPC_MEDIA_IB | |
51 | &ib_media_info, | |
d0f91938 EH |
52 | #endif |
53 | #ifdef CONFIG_TIPC_MEDIA_UDP | |
54 | &udp_media_info, | |
5702dbab JPM |
55 | #endif |
56 | NULL | |
57 | }; | |
b97bf3fd | 58 | |
1a90632d | 59 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
3a777ff8 | 60 | |
b97bf3fd | 61 | /** |
5c216e1d | 62 | * tipc_media_find - locates specified media object by name |
b97bf3fd | 63 | */ |
358a0d1c | 64 | struct tipc_media *tipc_media_find(const char *name) |
b97bf3fd | 65 | { |
b97bf3fd PL |
66 | u32 i; |
67 | ||
ef72a7e0 JPM |
68 | for (i = 0; media_info_array[i] != NULL; i++) { |
69 | if (!strcmp(media_info_array[i]->name, name)) | |
5702dbab | 70 | break; |
b97bf3fd | 71 | } |
ef72a7e0 | 72 | return media_info_array[i]; |
b97bf3fd PL |
73 | } |
74 | ||
c79be454 AS |
75 | /** |
76 | * media_find_id - locates specified media object by type identifier | |
77 | */ | |
358a0d1c | 78 | static struct tipc_media *media_find_id(u8 type) |
c79be454 AS |
79 | { |
80 | u32 i; | |
81 | ||
ef72a7e0 JPM |
82 | for (i = 0; media_info_array[i] != NULL; i++) { |
83 | if (media_info_array[i]->type_id == type) | |
5702dbab | 84 | break; |
c79be454 | 85 | } |
ef72a7e0 | 86 | return media_info_array[i]; |
b97bf3fd PL |
87 | } |
88 | ||
89 | /** | |
4323add6 | 90 | * tipc_media_addr_printf - record media address in print buffer |
b97bf3fd | 91 | */ |
dc1aed37 | 92 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
b97bf3fd | 93 | { |
c61b666e | 94 | char addr_str[MAX_ADDR_STR]; |
1a90632d | 95 | struct tipc_media *m; |
dc1aed37 | 96 | int ret; |
b97bf3fd | 97 | |
1a90632d | 98 | m = media_find_id(a->media_id); |
b97bf3fd | 99 | |
1a90632d JPM |
100 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
101 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); | |
c61b666e | 102 | else { |
c61b666e | 103 | u32 i; |
b97bf3fd | 104 | |
941787b8 | 105 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
3d749a6a | 106 | for (i = 0; i < sizeof(a->value); i++) |
941787b8 | 107 | ret += scnprintf(buf - ret, len + ret, |
dc1aed37 | 108 | "-%02x", a->value[i]); |
b97bf3fd PL |
109 | } |
110 | } | |
111 | ||
b97bf3fd PL |
112 | /** |
113 | * bearer_name_validate - validate & (optionally) deconstruct bearer name | |
2c53040f BH |
114 | * @name: ptr to bearer name string |
115 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) | |
c4307285 | 116 | * |
b97bf3fd PL |
117 | * Returns 1 if bearer name is valid, otherwise 0. |
118 | */ | |
c4307285 | 119 | static int bearer_name_validate(const char *name, |
f19765f4 | 120 | struct tipc_bearer_names *name_parts) |
b97bf3fd PL |
121 | { |
122 | char name_copy[TIPC_MAX_BEARER_NAME]; | |
123 | char *media_name; | |
124 | char *if_name; | |
125 | u32 media_len; | |
126 | u32 if_len; | |
127 | ||
128 | /* copy bearer name & ensure length is OK */ | |
b97bf3fd PL |
129 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
130 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ | |
131 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); | |
132 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) | |
133 | return 0; | |
134 | ||
135 | /* ensure all component parts of bearer name are present */ | |
b97bf3fd | 136 | media_name = name_copy; |
2db9983a AS |
137 | if_name = strchr(media_name, ':'); |
138 | if (if_name == NULL) | |
b97bf3fd PL |
139 | return 0; |
140 | *(if_name++) = 0; | |
141 | media_len = if_name - media_name; | |
142 | if_len = strlen(if_name) + 1; | |
143 | ||
144 | /* validate component parts of bearer name */ | |
c4307285 | 145 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
fc073938 | 146 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
b97bf3fd PL |
147 | return 0; |
148 | ||
149 | /* return bearer name components, if necessary */ | |
b97bf3fd PL |
150 | if (name_parts) { |
151 | strcpy(name_parts->media_name, media_name); | |
152 | strcpy(name_parts->if_name, if_name); | |
153 | } | |
154 | return 1; | |
155 | } | |
156 | ||
157 | /** | |
5c216e1d | 158 | * tipc_bearer_find - locates bearer object with matching bearer name |
b97bf3fd | 159 | */ |
7f9f95d9 | 160 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
b97bf3fd | 161 | { |
7f9f95d9 | 162 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 163 | struct tipc_bearer *b; |
b97bf3fd PL |
164 | u32 i; |
165 | ||
3874ccbb | 166 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
167 | b = rtnl_dereference(tn->bearer_list[i]); |
168 | if (b && (!strcmp(b->name, name))) | |
169 | return b; | |
b97bf3fd | 170 | } |
1fc54d8f | 171 | return NULL; |
b97bf3fd PL |
172 | } |
173 | ||
7f9f95d9 | 174 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 175 | { |
7f9f95d9 | 176 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 177 | struct tipc_bearer *b; |
7a2f7d18 YX |
178 | |
179 | rcu_read_lock(); | |
1a90632d JPM |
180 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
181 | if (b) | |
182 | tipc_disc_add_dest(b->link_req); | |
7a2f7d18 | 183 | rcu_read_unlock(); |
b97bf3fd PL |
184 | } |
185 | ||
7f9f95d9 | 186 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
b97bf3fd | 187 | { |
7f9f95d9 | 188 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 189 | struct tipc_bearer *b; |
7a2f7d18 YX |
190 | |
191 | rcu_read_lock(); | |
1a90632d JPM |
192 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
193 | if (b) | |
194 | tipc_disc_remove_dest(b->link_req); | |
7a2f7d18 | 195 | rcu_read_unlock(); |
b97bf3fd PL |
196 | } |
197 | ||
b97bf3fd PL |
198 | /** |
199 | * tipc_enable_bearer - enable bearer with the given name | |
c4307285 | 200 | */ |
9ab15465 | 201 | static int tipc_enable_bearer(struct net *net, const char *name, |
d0f91938 EH |
202 | u32 disc_domain, u32 priority, |
203 | struct nlattr *attr[]) | |
b97bf3fd | 204 | { |
7f9f95d9 | 205 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d JPM |
206 | struct tipc_bearer *b; |
207 | struct tipc_media *m; | |
f19765f4 | 208 | struct tipc_bearer_names b_names; |
4e801fa1 | 209 | struct sk_buff *skb; |
b97bf3fd PL |
210 | char addr_string[16]; |
211 | u32 bearer_id; | |
212 | u32 with_this_prio; | |
213 | u32 i; | |
214 | int res = -EINVAL; | |
215 | ||
34747539 | 216 | if (!tn->own_addr) { |
2cf8aa19 EH |
217 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
218 | name); | |
b97bf3fd | 219 | return -ENOPROTOOPT; |
a10bd924 | 220 | } |
f19765f4 | 221 | if (!bearer_name_validate(name, &b_names)) { |
2cf8aa19 | 222 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
16cb4b33 | 223 | return -EINVAL; |
a10bd924 | 224 | } |
66e019a6 | 225 | if (tipc_addr_domain_valid(disc_domain) && |
34747539 YX |
226 | (disc_domain != tn->own_addr)) { |
227 | if (tipc_in_scope(disc_domain, tn->own_addr)) { | |
228 | disc_domain = tn->own_addr & TIPC_CLUSTER_MASK; | |
66e019a6 | 229 | res = 0; /* accept any node in own cluster */ |
34747539 | 230 | } else if (in_own_cluster_exact(net, disc_domain)) |
66e019a6 AS |
231 | res = 0; /* accept specified node in own cluster */ |
232 | } | |
233 | if (res) { | |
2cf8aa19 EH |
234 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
235 | name); | |
a10bd924 AS |
236 | return -EINVAL; |
237 | } | |
9efde4a0 | 238 | if ((priority > TIPC_MAX_LINK_PRI) && |
a10bd924 | 239 | (priority != TIPC_MEDIA_LINK_PRI)) { |
2cf8aa19 | 240 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
b97bf3fd | 241 | return -EINVAL; |
a10bd924 | 242 | } |
b97bf3fd | 243 | |
1a90632d JPM |
244 | m = tipc_media_find(b_names.media_name); |
245 | if (!m) { | |
2cf8aa19 EH |
246 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
247 | name, b_names.media_name); | |
7216cd94 | 248 | return -EINVAL; |
b97bf3fd | 249 | } |
16cb4b33 PL |
250 | |
251 | if (priority == TIPC_MEDIA_LINK_PRI) | |
1a90632d | 252 | priority = m->priority; |
b97bf3fd PL |
253 | |
254 | restart: | |
255 | bearer_id = MAX_BEARERS; | |
256 | with_this_prio = 1; | |
257 | for (i = MAX_BEARERS; i-- != 0; ) { | |
1a90632d JPM |
258 | b = rtnl_dereference(tn->bearer_list[i]); |
259 | if (!b) { | |
b97bf3fd PL |
260 | bearer_id = i; |
261 | continue; | |
262 | } | |
1a90632d | 263 | if (!strcmp(name, b->name)) { |
2cf8aa19 EH |
264 | pr_warn("Bearer <%s> rejected, already enabled\n", |
265 | name); | |
7216cd94 | 266 | return -EINVAL; |
b97bf3fd | 267 | } |
1a90632d | 268 | if ((b->priority == priority) && |
b97bf3fd PL |
269 | (++with_this_prio > 2)) { |
270 | if (priority-- == 0) { | |
2cf8aa19 EH |
271 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
272 | name); | |
7216cd94 | 273 | return -EINVAL; |
b97bf3fd | 274 | } |
2cf8aa19 EH |
275 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
276 | name, priority + 1, priority); | |
b97bf3fd PL |
277 | goto restart; |
278 | } | |
279 | } | |
280 | if (bearer_id >= MAX_BEARERS) { | |
2cf8aa19 EH |
281 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
282 | name, MAX_BEARERS); | |
7216cd94 | 283 | return -EINVAL; |
b97bf3fd PL |
284 | } |
285 | ||
1a90632d JPM |
286 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
287 | if (!b) | |
7216cd94 YX |
288 | return -ENOMEM; |
289 | ||
1a90632d JPM |
290 | strcpy(b->name, name); |
291 | b->media = m; | |
292 | res = m->enable_media(net, b, attr); | |
b97bf3fd | 293 | if (res) { |
2cf8aa19 EH |
294 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
295 | name, -res); | |
7216cd94 | 296 | return -EINVAL; |
b97bf3fd PL |
297 | } |
298 | ||
1a90632d JPM |
299 | b->identity = bearer_id; |
300 | b->tolerance = m->tolerance; | |
301 | b->window = m->window; | |
302 | b->domain = disc_domain; | |
303 | b->net_plane = bearer_id + 'A'; | |
304 | b->priority = priority; | |
3a777ff8 | 305 | |
4e801fa1 | 306 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
3a777ff8 | 307 | if (res) { |
1a90632d | 308 | bearer_disable(net, b); |
2cf8aa19 EH |
309 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
310 | name); | |
7216cd94 | 311 | return -EINVAL; |
3a777ff8 | 312 | } |
3874ccbb | 313 | |
1a90632d | 314 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
4e801fa1 JPM |
315 | if (skb) |
316 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); | |
35c55c98 JPM |
317 | |
318 | if (tipc_mon_create(net, bearer_id)) | |
319 | return -ENOMEM; | |
320 | ||
2cf8aa19 EH |
321 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
322 | name, | |
323 | tipc_addr_string_fill(addr_string, disc_domain), priority); | |
b97bf3fd PL |
324 | return res; |
325 | } | |
326 | ||
327 | /** | |
512137ee | 328 | * tipc_reset_bearer - Reset all links established over this bearer |
b97bf3fd | 329 | */ |
1a90632d | 330 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 331 | { |
1a90632d JPM |
332 | pr_info("Resetting bearer <%s>\n", b->name); |
333 | tipc_node_delete_links(net, b->identity); | |
334 | tipc_disc_reset(net, b); | |
0e35fd5e | 335 | return 0; |
b97bf3fd PL |
336 | } |
337 | ||
1fc07f3e JPM |
338 | /* tipc_bearer_reset_all - reset all links on all bearers |
339 | */ | |
340 | void tipc_bearer_reset_all(struct net *net) | |
341 | { | |
342 | struct tipc_net *tn = tipc_net(net); | |
343 | struct tipc_bearer *b; | |
344 | int i; | |
345 | ||
346 | for (i = 0; i < MAX_BEARERS; i++) { | |
347 | b = rcu_dereference_rtnl(tn->bearer_list[i]); | |
348 | if (b) | |
349 | tipc_reset_bearer(net, b); | |
350 | } | |
351 | } | |
352 | ||
b97bf3fd | 353 | /** |
617d3c7a | 354 | * bearer_disable |
c4307285 | 355 | * |
7216cd94 | 356 | * Note: This routine assumes caller holds RTNL lock. |
b97bf3fd | 357 | */ |
1a90632d | 358 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
b97bf3fd | 359 | { |
5b7066c3 JPM |
360 | struct tipc_net *tn = tipc_net(net); |
361 | int bearer_id = b->identity; | |
3874ccbb | 362 | |
1a90632d JPM |
363 | pr_info("Disabling bearer <%s>\n", b->name); |
364 | b->media->disable_media(b); | |
5b7066c3 | 365 | tipc_node_delete_links(net, bearer_id); |
1a90632d JPM |
366 | RCU_INIT_POINTER(b->media_ptr, NULL); |
367 | if (b->link_req) | |
368 | tipc_disc_delete(b->link_req); | |
5b7066c3 | 369 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
1a90632d | 370 | kfree_rcu(b, rcu); |
35c55c98 | 371 | tipc_mon_delete(net, bearer_id); |
b97bf3fd PL |
372 | } |
373 | ||
d0f91938 EH |
374 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
375 | struct nlattr *attr[]) | |
e4d050cb YX |
376 | { |
377 | struct net_device *dev; | |
378 | char *driver_name = strchr((const char *)b->name, ':') + 1; | |
379 | ||
380 | /* Find device with specified name */ | |
7f9f95d9 | 381 | dev = dev_get_by_name(net, driver_name); |
e4d050cb YX |
382 | if (!dev) |
383 | return -ENODEV; | |
384 | ||
38504c28 | 385 | /* Associate TIPC bearer with L2 bearer */ |
2231c5af | 386 | rcu_assign_pointer(b->media_ptr, dev); |
38504c28 | 387 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
e4d050cb YX |
388 | memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len); |
389 | b->bcast_addr.media_id = b->media->type_id; | |
390 | b->bcast_addr.broadcast = 1; | |
391 | b->mtu = dev->mtu; | |
38504c28 | 392 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
e4d050cb YX |
393 | rcu_assign_pointer(dev->tipc_ptr, b); |
394 | return 0; | |
395 | } | |
396 | ||
38504c28 | 397 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
e4d050cb | 398 | * |
282b3a05 | 399 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
e4d050cb YX |
400 | */ |
401 | void tipc_disable_l2_media(struct tipc_bearer *b) | |
402 | { | |
2231c5af YX |
403 | struct net_device *dev; |
404 | ||
405 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); | |
e4d050cb | 406 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
f1c8d8cb | 407 | synchronize_net(); |
e4d050cb YX |
408 | dev_put(dev); |
409 | } | |
410 | ||
411 | /** | |
38504c28 | 412 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
5b7066c3 | 413 | * @skb: the packet to be sent |
1a90632d | 414 | * @b: the bearer through which the packet is to be sent |
e4d050cb YX |
415 | * @dest: peer destination address |
416 | */ | |
7214bcf8 | 417 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
1da46568 | 418 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
e4d050cb | 419 | { |
2231c5af | 420 | struct net_device *dev; |
e4d050cb | 421 | int delta; |
5b7066c3 | 422 | void *tipc_ptr; |
2231c5af YX |
423 | |
424 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); | |
425 | if (!dev) | |
426 | return 0; | |
e4d050cb | 427 | |
5b7066c3 | 428 | /* Send RESET message even if bearer is detached from device */ |
66d95b67 | 429 | tipc_ptr = rcu_dereference_rtnl(dev->tipc_ptr); |
5b7066c3 JPM |
430 | if (unlikely(!tipc_ptr && !msg_is_reset(buf_msg(skb)))) |
431 | goto drop; | |
432 | ||
7214bcf8 | 433 | delta = dev->hard_header_len - skb_headroom(skb); |
e4d050cb | 434 | if ((delta > 0) && |
5b7066c3 JPM |
435 | pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) |
436 | goto drop; | |
e4d050cb | 437 | |
7214bcf8 JPM |
438 | skb_reset_network_header(skb); |
439 | skb->dev = dev; | |
440 | skb->protocol = htons(ETH_P_TIPC); | |
441 | dev_hard_header(skb, dev, ETH_P_TIPC, dest->value, | |
442 | dev->dev_addr, skb->len); | |
443 | dev_queue_xmit(skb); | |
e4d050cb | 444 | return 0; |
5b7066c3 JPM |
445 | drop: |
446 | kfree_skb(skb); | |
447 | return 0; | |
e4d050cb YX |
448 | } |
449 | ||
959e1781 JPM |
450 | int tipc_bearer_mtu(struct net *net, u32 bearer_id) |
451 | { | |
452 | int mtu = 0; | |
453 | struct tipc_bearer *b; | |
454 | ||
455 | rcu_read_lock(); | |
456 | b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]); | |
457 | if (b) | |
458 | mtu = b->mtu; | |
459 | rcu_read_unlock(); | |
460 | return mtu; | |
461 | } | |
462 | ||
60852d67 JPM |
463 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
464 | */ | |
465 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, | |
466 | struct sk_buff *skb, | |
467 | struct tipc_media_addr *dest) | |
468 | { | |
469 | struct tipc_net *tn = tipc_net(net); | |
470 | struct tipc_bearer *b; | |
471 | ||
472 | rcu_read_lock(); | |
473 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
474 | if (likely(b)) | |
475 | b->media->send_msg(net, skb, b, dest); | |
4e801fa1 JPM |
476 | else |
477 | kfree_skb(skb); | |
60852d67 | 478 | rcu_read_unlock(); |
60852d67 JPM |
479 | } |
480 | ||
af9b028e JPM |
481 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
482 | */ | |
483 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, | |
484 | struct sk_buff_head *xmitq, | |
485 | struct tipc_media_addr *dst) | |
486 | { | |
487 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
488 | struct tipc_bearer *b; | |
489 | struct sk_buff *skb, *tmp; | |
490 | ||
491 | if (skb_queue_empty(xmitq)) | |
492 | return; | |
493 | ||
494 | rcu_read_lock(); | |
495 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
4e801fa1 JPM |
496 | if (unlikely(!b)) |
497 | __skb_queue_purge(xmitq); | |
498 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
499 | __skb_dequeue(xmitq); | |
500 | b->media->send_msg(net, skb, b, dst); | |
b06b281e JPM |
501 | } |
502 | rcu_read_unlock(); | |
503 | } | |
504 | ||
505 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations | |
506 | */ | |
507 | void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, | |
508 | struct sk_buff_head *xmitq) | |
509 | { | |
510 | struct tipc_net *tn = tipc_net(net); | |
511 | int net_id = tn->net_id; | |
512 | struct tipc_bearer *b; | |
513 | struct sk_buff *skb, *tmp; | |
514 | struct tipc_msg *hdr; | |
515 | ||
516 | rcu_read_lock(); | |
517 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); | |
4e801fa1 JPM |
518 | if (unlikely(!b)) |
519 | __skb_queue_purge(xmitq); | |
520 | skb_queue_walk_safe(xmitq, skb, tmp) { | |
521 | hdr = buf_msg(skb); | |
522 | msg_set_non_seq(hdr, 1); | |
523 | msg_set_mc_netid(hdr, net_id); | |
524 | __skb_dequeue(xmitq); | |
525 | b->media->send_msg(net, skb, b, &b->bcast_addr); | |
af9b028e JPM |
526 | } |
527 | rcu_read_unlock(); | |
528 | } | |
529 | ||
6e967adf YX |
530 | /** |
531 | * tipc_l2_rcv_msg - handle incoming TIPC message from an interface | |
532 | * @buf: the received packet | |
533 | * @dev: the net device that the packet was received on | |
534 | * @pt: the packet_type structure which was used to register this handler | |
535 | * @orig_dev: the original receive net device in case the device is a bond | |
536 | * | |
537 | * Accept only packets explicitly sent to this node, or broadcast packets; | |
538 | * ignores packets sent using interface multicast, and traffic sent to other | |
539 | * nodes (which can happen if interface is running in promiscuous mode). | |
540 | */ | |
4e801fa1 | 541 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
6e967adf YX |
542 | struct packet_type *pt, struct net_device *orig_dev) |
543 | { | |
1a90632d | 544 | struct tipc_bearer *b; |
6e967adf | 545 | |
6e967adf | 546 | rcu_read_lock(); |
1a90632d | 547 | b = rcu_dereference_rtnl(dev->tipc_ptr); |
4e801fa1 JPM |
548 | if (likely(b && (skb->pkt_type <= PACKET_BROADCAST))) { |
549 | skb->next = NULL; | |
550 | tipc_rcv(dev_net(dev), skb, b); | |
551 | rcu_read_unlock(); | |
552 | return NET_RX_SUCCESS; | |
6e967adf YX |
553 | } |
554 | rcu_read_unlock(); | |
4e801fa1 | 555 | kfree_skb(skb); |
6e967adf YX |
556 | return NET_RX_DROP; |
557 | } | |
558 | ||
559 | /** | |
560 | * tipc_l2_device_event - handle device events from network device | |
561 | * @nb: the context of the notification | |
562 | * @evt: the type of event | |
563 | * @ptr: the net device that the event was on | |
564 | * | |
565 | * This function is called by the Ethernet driver in case of link | |
566 | * change event. | |
567 | */ | |
568 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, | |
569 | void *ptr) | |
570 | { | |
6e967adf | 571 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
c93d3baa | 572 | struct net *net = dev_net(dev); |
5b7066c3 | 573 | struct tipc_net *tn = tipc_net(net); |
1a90632d | 574 | struct tipc_bearer *b; |
5b7066c3 | 575 | int i; |
6e967adf | 576 | |
1a90632d | 577 | b = rtnl_dereference(dev->tipc_ptr); |
5b7066c3 JPM |
578 | if (!b) { |
579 | for (i = 0; i < MAX_BEARERS; b = NULL, i++) { | |
580 | b = rtnl_dereference(tn->bearer_list[i]); | |
581 | if (b && (b->media_ptr == dev)) | |
582 | break; | |
583 | } | |
584 | } | |
1a90632d | 585 | if (!b) |
6e967adf | 586 | return NOTIFY_DONE; |
6e967adf | 587 | |
1a90632d | 588 | b->mtu = dev->mtu; |
6e967adf YX |
589 | |
590 | switch (evt) { | |
591 | case NETDEV_CHANGE: | |
592 | if (netif_carrier_ok(dev)) | |
593 | break; | |
5b7066c3 JPM |
594 | case NETDEV_UP: |
595 | rcu_assign_pointer(dev->tipc_ptr, b); | |
596 | break; | |
282b3a05 | 597 | case NETDEV_GOING_DOWN: |
5b7066c3 JPM |
598 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
599 | synchronize_net(); | |
600 | tipc_reset_bearer(net, b); | |
601 | break; | |
6e967adf | 602 | case NETDEV_CHANGEMTU: |
1a90632d | 603 | tipc_reset_bearer(net, b); |
a21a584d | 604 | break; |
6e967adf | 605 | case NETDEV_CHANGEADDR: |
1a90632d | 606 | b->media->raw2addr(b, &b->addr, |
5b7066c3 | 607 | (char *)dev->dev_addr); |
1a90632d | 608 | tipc_reset_bearer(net, b); |
6e967adf YX |
609 | break; |
610 | case NETDEV_UNREGISTER: | |
611 | case NETDEV_CHANGENAME: | |
1a90632d | 612 | bearer_disable(dev_net(dev), b); |
6e967adf YX |
613 | break; |
614 | } | |
6e967adf YX |
615 | return NOTIFY_OK; |
616 | } | |
617 | ||
618 | static struct packet_type tipc_packet_type __read_mostly = { | |
184593c7 | 619 | .type = htons(ETH_P_TIPC), |
6e967adf YX |
620 | .func = tipc_l2_rcv_msg, |
621 | }; | |
622 | ||
623 | static struct notifier_block notifier = { | |
624 | .notifier_call = tipc_l2_device_event, | |
625 | .priority = 0, | |
626 | }; | |
627 | ||
628 | int tipc_bearer_setup(void) | |
629 | { | |
970122fd YX |
630 | int err; |
631 | ||
632 | err = register_netdevice_notifier(¬ifier); | |
633 | if (err) | |
634 | return err; | |
6e967adf | 635 | dev_add_pack(&tipc_packet_type); |
970122fd | 636 | return 0; |
6e967adf YX |
637 | } |
638 | ||
639 | void tipc_bearer_cleanup(void) | |
640 | { | |
641 | unregister_netdevice_notifier(¬ifier); | |
642 | dev_remove_pack(&tipc_packet_type); | |
643 | } | |
b97bf3fd | 644 | |
f2f9800d | 645 | void tipc_bearer_stop(struct net *net) |
b97bf3fd | 646 | { |
7f9f95d9 | 647 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1a90632d | 648 | struct tipc_bearer *b; |
b97bf3fd PL |
649 | u32 i; |
650 | ||
b97bf3fd | 651 | for (i = 0; i < MAX_BEARERS; i++) { |
1a90632d JPM |
652 | b = rtnl_dereference(tn->bearer_list[i]); |
653 | if (b) { | |
654 | bearer_disable(net, b); | |
7f9f95d9 | 655 | tn->bearer_list[i] = NULL; |
3874ccbb | 656 | } |
b97bf3fd | 657 | } |
b97bf3fd | 658 | } |
0655f6a8 | 659 | |
35b9dd76 | 660 | /* Caller should hold rtnl_lock to protect the bearer */ |
d8182804 | 661 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
f2f67390 | 662 | struct tipc_bearer *bearer, int nlflags) |
35b9dd76 RA |
663 | { |
664 | void *hdr; | |
665 | struct nlattr *attrs; | |
666 | struct nlattr *prop; | |
667 | ||
bfb3e5dd | 668 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 669 | nlflags, TIPC_NL_BEARER_GET); |
35b9dd76 RA |
670 | if (!hdr) |
671 | return -EMSGSIZE; | |
672 | ||
673 | attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER); | |
674 | if (!attrs) | |
675 | goto msg_full; | |
676 | ||
677 | if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name)) | |
678 | goto attr_msg_full; | |
679 | ||
680 | prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP); | |
681 | if (!prop) | |
682 | goto prop_msg_full; | |
683 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority)) | |
684 | goto prop_msg_full; | |
685 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance)) | |
686 | goto prop_msg_full; | |
687 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window)) | |
688 | goto prop_msg_full; | |
689 | ||
690 | nla_nest_end(msg->skb, prop); | |
691 | nla_nest_end(msg->skb, attrs); | |
692 | genlmsg_end(msg->skb, hdr); | |
693 | ||
694 | return 0; | |
695 | ||
696 | prop_msg_full: | |
697 | nla_nest_cancel(msg->skb, prop); | |
698 | attr_msg_full: | |
699 | nla_nest_cancel(msg->skb, attrs); | |
700 | msg_full: | |
701 | genlmsg_cancel(msg->skb, hdr); | |
702 | ||
703 | return -EMSGSIZE; | |
704 | } | |
705 | ||
706 | int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
707 | { | |
708 | int err; | |
709 | int i = cb->args[0]; | |
710 | struct tipc_bearer *bearer; | |
711 | struct tipc_nl_msg msg; | |
7f9f95d9 YX |
712 | struct net *net = sock_net(skb->sk); |
713 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
35b9dd76 RA |
714 | |
715 | if (i == MAX_BEARERS) | |
716 | return 0; | |
717 | ||
718 | msg.skb = skb; | |
719 | msg.portid = NETLINK_CB(cb->skb).portid; | |
720 | msg.seq = cb->nlh->nlmsg_seq; | |
721 | ||
722 | rtnl_lock(); | |
723 | for (i = 0; i < MAX_BEARERS; i++) { | |
7f9f95d9 | 724 | bearer = rtnl_dereference(tn->bearer_list[i]); |
35b9dd76 RA |
725 | if (!bearer) |
726 | continue; | |
727 | ||
f2f67390 | 728 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
35b9dd76 RA |
729 | if (err) |
730 | break; | |
731 | } | |
732 | rtnl_unlock(); | |
733 | ||
734 | cb->args[0] = i; | |
735 | return skb->len; | |
736 | } | |
737 | ||
738 | int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info) | |
739 | { | |
740 | int err; | |
741 | char *name; | |
742 | struct sk_buff *rep; | |
743 | struct tipc_bearer *bearer; | |
744 | struct tipc_nl_msg msg; | |
745 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
7f9f95d9 | 746 | struct net *net = genl_info_net(info); |
35b9dd76 RA |
747 | |
748 | if (!info->attrs[TIPC_NLA_BEARER]) | |
749 | return -EINVAL; | |
750 | ||
751 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
752 | info->attrs[TIPC_NLA_BEARER], | |
753 | tipc_nl_bearer_policy); | |
754 | if (err) | |
755 | return err; | |
756 | ||
757 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
758 | return -EINVAL; | |
759 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
760 | ||
761 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
762 | if (!rep) | |
763 | return -ENOMEM; | |
764 | ||
765 | msg.skb = rep; | |
766 | msg.portid = info->snd_portid; | |
767 | msg.seq = info->snd_seq; | |
768 | ||
769 | rtnl_lock(); | |
7f9f95d9 | 770 | bearer = tipc_bearer_find(net, name); |
35b9dd76 RA |
771 | if (!bearer) { |
772 | err = -EINVAL; | |
773 | goto err_out; | |
774 | } | |
775 | ||
f2f67390 | 776 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
35b9dd76 RA |
777 | if (err) |
778 | goto err_out; | |
779 | rtnl_unlock(); | |
780 | ||
781 | return genlmsg_reply(rep, info); | |
782 | err_out: | |
783 | rtnl_unlock(); | |
784 | nlmsg_free(rep); | |
785 | ||
786 | return err; | |
787 | } | |
788 | ||
0655f6a8 RA |
789 | int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info) |
790 | { | |
791 | int err; | |
792 | char *name; | |
793 | struct tipc_bearer *bearer; | |
794 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 | 795 | struct net *net = sock_net(skb->sk); |
0655f6a8 RA |
796 | |
797 | if (!info->attrs[TIPC_NLA_BEARER]) | |
798 | return -EINVAL; | |
799 | ||
800 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
801 | info->attrs[TIPC_NLA_BEARER], | |
802 | tipc_nl_bearer_policy); | |
803 | if (err) | |
804 | return err; | |
805 | ||
806 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
807 | return -EINVAL; | |
808 | ||
809 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
810 | ||
811 | rtnl_lock(); | |
7f9f95d9 | 812 | bearer = tipc_bearer_find(net, name); |
0655f6a8 RA |
813 | if (!bearer) { |
814 | rtnl_unlock(); | |
815 | return -EINVAL; | |
816 | } | |
817 | ||
b1c29f6b | 818 | bearer_disable(net, bearer); |
0655f6a8 RA |
819 | rtnl_unlock(); |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info) | |
825 | { | |
826 | int err; | |
827 | char *bearer; | |
828 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
9ab15465 RA |
829 | struct net *net = sock_net(skb->sk); |
830 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
0655f6a8 RA |
831 | u32 domain; |
832 | u32 prio; | |
833 | ||
834 | prio = TIPC_MEDIA_LINK_PRI; | |
34747539 | 835 | domain = tn->own_addr & TIPC_CLUSTER_MASK; |
0655f6a8 RA |
836 | |
837 | if (!info->attrs[TIPC_NLA_BEARER]) | |
838 | return -EINVAL; | |
839 | ||
840 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
841 | info->attrs[TIPC_NLA_BEARER], | |
842 | tipc_nl_bearer_policy); | |
843 | if (err) | |
844 | return err; | |
845 | ||
846 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
847 | return -EINVAL; | |
848 | ||
849 | bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
850 | ||
851 | if (attrs[TIPC_NLA_BEARER_DOMAIN]) | |
852 | domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]); | |
853 | ||
854 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
855 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
856 | ||
857 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
858 | props); | |
859 | if (err) | |
860 | return err; | |
861 | ||
862 | if (props[TIPC_NLA_PROP_PRIO]) | |
863 | prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
864 | } | |
865 | ||
866 | rtnl_lock(); | |
d0f91938 | 867 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
0655f6a8 RA |
868 | if (err) { |
869 | rtnl_unlock(); | |
870 | return err; | |
871 | } | |
872 | rtnl_unlock(); | |
873 | ||
874 | return 0; | |
875 | } | |
315c00bc RA |
876 | |
877 | int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info) | |
878 | { | |
879 | int err; | |
880 | char *name; | |
881 | struct tipc_bearer *b; | |
882 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
c3d6fb85 | 883 | struct net *net = sock_net(skb->sk); |
315c00bc RA |
884 | |
885 | if (!info->attrs[TIPC_NLA_BEARER]) | |
886 | return -EINVAL; | |
887 | ||
888 | err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX, | |
889 | info->attrs[TIPC_NLA_BEARER], | |
890 | tipc_nl_bearer_policy); | |
891 | if (err) | |
892 | return err; | |
893 | ||
894 | if (!attrs[TIPC_NLA_BEARER_NAME]) | |
895 | return -EINVAL; | |
896 | name = nla_data(attrs[TIPC_NLA_BEARER_NAME]); | |
897 | ||
898 | rtnl_lock(); | |
7f9f95d9 | 899 | b = tipc_bearer_find(net, name); |
315c00bc RA |
900 | if (!b) { |
901 | rtnl_unlock(); | |
902 | return -EINVAL; | |
903 | } | |
904 | ||
905 | if (attrs[TIPC_NLA_BEARER_PROP]) { | |
906 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
907 | ||
908 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP], | |
909 | props); | |
910 | if (err) { | |
911 | rtnl_unlock(); | |
912 | return err; | |
913 | } | |
914 | ||
915 | if (props[TIPC_NLA_PROP_TOL]) | |
916 | b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
917 | if (props[TIPC_NLA_PROP_PRIO]) | |
918 | b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
919 | if (props[TIPC_NLA_PROP_WIN]) | |
920 | b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
921 | } | |
922 | rtnl_unlock(); | |
923 | ||
924 | return 0; | |
925 | } | |
46f15c67 | 926 | |
d8182804 | 927 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
f2f67390 | 928 | struct tipc_media *media, int nlflags) |
46f15c67 RA |
929 | { |
930 | void *hdr; | |
931 | struct nlattr *attrs; | |
932 | struct nlattr *prop; | |
933 | ||
bfb3e5dd | 934 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
f2f67390 | 935 | nlflags, TIPC_NL_MEDIA_GET); |
46f15c67 RA |
936 | if (!hdr) |
937 | return -EMSGSIZE; | |
938 | ||
939 | attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA); | |
940 | if (!attrs) | |
941 | goto msg_full; | |
942 | ||
943 | if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name)) | |
944 | goto attr_msg_full; | |
945 | ||
946 | prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP); | |
947 | if (!prop) | |
948 | goto prop_msg_full; | |
949 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority)) | |
950 | goto prop_msg_full; | |
951 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance)) | |
952 | goto prop_msg_full; | |
953 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window)) | |
954 | goto prop_msg_full; | |
955 | ||
956 | nla_nest_end(msg->skb, prop); | |
957 | nla_nest_end(msg->skb, attrs); | |
958 | genlmsg_end(msg->skb, hdr); | |
959 | ||
960 | return 0; | |
961 | ||
962 | prop_msg_full: | |
963 | nla_nest_cancel(msg->skb, prop); | |
964 | attr_msg_full: | |
965 | nla_nest_cancel(msg->skb, attrs); | |
966 | msg_full: | |
967 | genlmsg_cancel(msg->skb, hdr); | |
968 | ||
969 | return -EMSGSIZE; | |
970 | } | |
971 | ||
972 | int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
973 | { | |
974 | int err; | |
975 | int i = cb->args[0]; | |
976 | struct tipc_nl_msg msg; | |
977 | ||
978 | if (i == MAX_MEDIA) | |
979 | return 0; | |
980 | ||
981 | msg.skb = skb; | |
982 | msg.portid = NETLINK_CB(cb->skb).portid; | |
983 | msg.seq = cb->nlh->nlmsg_seq; | |
984 | ||
985 | rtnl_lock(); | |
986 | for (; media_info_array[i] != NULL; i++) { | |
f2f67390 ND |
987 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
988 | NLM_F_MULTI); | |
46f15c67 RA |
989 | if (err) |
990 | break; | |
991 | } | |
992 | rtnl_unlock(); | |
993 | ||
994 | cb->args[0] = i; | |
995 | return skb->len; | |
996 | } | |
997 | ||
998 | int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info) | |
999 | { | |
1000 | int err; | |
1001 | char *name; | |
1002 | struct tipc_nl_msg msg; | |
1003 | struct tipc_media *media; | |
1004 | struct sk_buff *rep; | |
1005 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1006 | ||
1007 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1008 | return -EINVAL; | |
1009 | ||
1010 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1011 | info->attrs[TIPC_NLA_MEDIA], | |
1012 | tipc_nl_media_policy); | |
1013 | if (err) | |
1014 | return err; | |
1015 | ||
1016 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1017 | return -EINVAL; | |
1018 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1019 | ||
1020 | rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
1021 | if (!rep) | |
1022 | return -ENOMEM; | |
1023 | ||
1024 | msg.skb = rep; | |
1025 | msg.portid = info->snd_portid; | |
1026 | msg.seq = info->snd_seq; | |
1027 | ||
1028 | rtnl_lock(); | |
1029 | media = tipc_media_find(name); | |
1030 | if (!media) { | |
1031 | err = -EINVAL; | |
1032 | goto err_out; | |
1033 | } | |
1034 | ||
f2f67390 | 1035 | err = __tipc_nl_add_media(&msg, media, 0); |
46f15c67 RA |
1036 | if (err) |
1037 | goto err_out; | |
1038 | rtnl_unlock(); | |
1039 | ||
1040 | return genlmsg_reply(rep, info); | |
1041 | err_out: | |
1042 | rtnl_unlock(); | |
1043 | nlmsg_free(rep); | |
1044 | ||
1045 | return err; | |
1046 | } | |
1e55417d RA |
1047 | |
1048 | int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info) | |
1049 | { | |
1050 | int err; | |
1051 | char *name; | |
1052 | struct tipc_media *m; | |
1053 | struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1]; | |
1054 | ||
1055 | if (!info->attrs[TIPC_NLA_MEDIA]) | |
1056 | return -EINVAL; | |
1057 | ||
1058 | err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX, | |
1059 | info->attrs[TIPC_NLA_MEDIA], | |
1060 | tipc_nl_media_policy); | |
1061 | ||
1062 | if (!attrs[TIPC_NLA_MEDIA_NAME]) | |
1063 | return -EINVAL; | |
1064 | name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]); | |
1065 | ||
1066 | rtnl_lock(); | |
1067 | m = tipc_media_find(name); | |
1068 | if (!m) { | |
1069 | rtnl_unlock(); | |
1070 | return -EINVAL; | |
1071 | } | |
1072 | ||
1073 | if (attrs[TIPC_NLA_MEDIA_PROP]) { | |
1074 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
1075 | ||
1076 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP], | |
1077 | props); | |
1078 | if (err) { | |
1079 | rtnl_unlock(); | |
1080 | return err; | |
1081 | } | |
1082 | ||
1083 | if (props[TIPC_NLA_PROP_TOL]) | |
1084 | m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]); | |
1085 | if (props[TIPC_NLA_PROP_PRIO]) | |
1086 | m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]); | |
1087 | if (props[TIPC_NLA_PROP_WIN]) | |
1088 | m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
1089 | } | |
1090 | rtnl_unlock(); | |
1091 | ||
1092 | return 0; | |
1093 | } |