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