?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
staging: wilc1000: rename pstrMessage in wilc_mq_recv
[linux-2.6/btrfs-unstable.git] / net / tipc / bearer.c
blob802ffad3200da61405b348314b9b48eb11580583
1 /*
2 * net/tipc/bearer.c: TIPC bearer code
3 *
4 * Copyright (c) 1996-2006, 2013-2014, Ericsson AB
5 * Copyright (c) 2004-2006, 2010-2013, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
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.
19 *
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
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include <net/sock.h>
38 #include "core.h"
39 #include "bearer.h"
40 #include "link.h"
41 #include "discover.h"
42 #include "bcast.h"
43
44 #define MAX_ADDR_STR 60
45
46 static struct tipc_media * const media_info_array[] = {
47 &eth_media_info,
48 #ifdef CONFIG_TIPC_MEDIA_IB
49 &ib_media_info,
50 #endif
51 #ifdef CONFIG_TIPC_MEDIA_UDP
52 &udp_media_info,
53 #endif
54 NULL
55 };
56
57 static const struct nla_policy
58 tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
59 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
60 [TIPC_NLA_BEARER_NAME] = {
61 .type = NLA_STRING,
62 .len = TIPC_MAX_BEARER_NAME
63 },
64 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
65 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
66 };
67
68 static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
69 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
70 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
71 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
72 };
73
74 static void bearer_disable(struct net *net, struct tipc_bearer *b);
75
76 /**
77 * tipc_media_find - locates specified media object by name
78 */
79 struct tipc_media *tipc_media_find(const char *name)
80 {
81 u32 i;
82
83 for (i = 0; media_info_array[i] != NULL; i++) {
84 if (!strcmp(media_info_array[i]->name, name))
85 break;
86 }
87 return media_info_array[i];
88 }
89
90 /**
91 * media_find_id - locates specified media object by type identifier
92 */
93 static struct tipc_media *media_find_id(u8 type)
94 {
95 u32 i;
96
97 for (i = 0; media_info_array[i] != NULL; i++) {
98 if (media_info_array[i]->type_id == type)
99 break;
100 }
101 return media_info_array[i];
102 }
103
104 /**
105 * tipc_media_addr_printf - record media address in print buffer
106 */
107 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
108 {
109 char addr_str[MAX_ADDR_STR];
110 struct tipc_media *m;
111 int ret;
112
113 m = media_find_id(a->media_id);
114
115 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
116 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
117 else {
118 u32 i;
119
120 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
121 for (i = 0; i < sizeof(a->value); i++)
122 ret += scnprintf(buf - ret, len + ret,
123 "-%02x", a->value[i]);
124 }
125 }
126
127 /**
128 * bearer_name_validate - validate & (optionally) deconstruct bearer name
129 * @name: ptr to bearer name string
130 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
131 *
132 * Returns 1 if bearer name is valid, otherwise 0.
133 */
134 static int bearer_name_validate(const char *name,
135 struct tipc_bearer_names *name_parts)
136 {
137 char name_copy[TIPC_MAX_BEARER_NAME];
138 char *media_name;
139 char *if_name;
140 u32 media_len;
141 u32 if_len;
142
143 /* copy bearer name & ensure length is OK */
144 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
145 /* need above in case non-Posix strncpy() doesn't pad with nulls */
146 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
147 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
148 return 0;
149
150 /* ensure all component parts of bearer name are present */
151 media_name = name_copy;
152 if_name = strchr(media_name, ':');
153 if (if_name == NULL)
154 return 0;
155 *(if_name++) = 0;
156 media_len = if_name - media_name;
157 if_len = strlen(if_name) + 1;
158
159 /* validate component parts of bearer name */
160 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
161 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
162 return 0;
163
164 /* return bearer name components, if necessary */
165 if (name_parts) {
166 strcpy(name_parts->media_name, media_name);
167 strcpy(name_parts->if_name, if_name);
168 }
169 return 1;
170 }
171
172 /**
173 * tipc_bearer_find - locates bearer object with matching bearer name
174 */
175 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
176 {
177 struct tipc_net *tn = net_generic(net, tipc_net_id);
178 struct tipc_bearer *b;
179 u32 i;
180
181 for (i = 0; i < MAX_BEARERS; i++) {
182 b = rtnl_dereference(tn->bearer_list[i]);
183 if (b && (!strcmp(b->name, name)))
184 return b;
185 }
186 return NULL;
187 }
188
189 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
190 {
191 struct tipc_net *tn = net_generic(net, tipc_net_id);
192 struct tipc_bearer *b;
193
194 rcu_read_lock();
195 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
196 if (b)
197 tipc_disc_add_dest(b->link_req);
198 rcu_read_unlock();
199 }
200
201 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
202 {
203 struct tipc_net *tn = net_generic(net, tipc_net_id);
204 struct tipc_bearer *b;
205
206 rcu_read_lock();
207 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
208 if (b)
209 tipc_disc_remove_dest(b->link_req);
210 rcu_read_unlock();
211 }
212
213 /**
214 * tipc_enable_bearer - enable bearer with the given name
215 */
216 static int tipc_enable_bearer(struct net *net, const char *name,
217 u32 disc_domain, u32 priority,
218 struct nlattr *attr[])
219 {
220 struct tipc_net *tn = net_generic(net, tipc_net_id);
221 struct tipc_bearer *b;
222 struct tipc_media *m;
223 struct tipc_bearer_names b_names;
224 char addr_string[16];
225 u32 bearer_id;
226 u32 with_this_prio;
227 u32 i;
228 int res = -EINVAL;
229
230 if (!tn->own_addr) {
231 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
232 name);
233 return -ENOPROTOOPT;
234 }
235 if (!bearer_name_validate(name, &b_names)) {
236 pr_warn("Bearer <%s> rejected, illegal name\n", name);
237 return -EINVAL;
238 }
239 if (tipc_addr_domain_valid(disc_domain) &&
240 (disc_domain != tn->own_addr)) {
241 if (tipc_in_scope(disc_domain, tn->own_addr)) {
242 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
243 res = 0; /* accept any node in own cluster */
244 } else if (in_own_cluster_exact(net, disc_domain))
245 res = 0; /* accept specified node in own cluster */
246 }
247 if (res) {
248 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
249 name);
250 return -EINVAL;
251 }
252 if ((priority > TIPC_MAX_LINK_PRI) &&
253 (priority != TIPC_MEDIA_LINK_PRI)) {
254 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
255 return -EINVAL;
256 }
257
258 m = tipc_media_find(b_names.media_name);
259 if (!m) {
260 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
261 name, b_names.media_name);
262 return -EINVAL;
263 }
264
265 if (priority == TIPC_MEDIA_LINK_PRI)
266 priority = m->priority;
267
268 restart:
269 bearer_id = MAX_BEARERS;
270 with_this_prio = 1;
271 for (i = MAX_BEARERS; i-- != 0; ) {
272 b = rtnl_dereference(tn->bearer_list[i]);
273 if (!b) {
274 bearer_id = i;
275 continue;
276 }
277 if (!strcmp(name, b->name)) {
278 pr_warn("Bearer <%s> rejected, already enabled\n",
279 name);
280 return -EINVAL;
281 }
282 if ((b->priority == priority) &&
283 (++with_this_prio > 2)) {
284 if (priority-- == 0) {
285 pr_warn("Bearer <%s> rejected, duplicate priority\n",
286 name);
287 return -EINVAL;
288 }
289 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
290 name, priority + 1, priority);
291 goto restart;
292 }
293 }
294 if (bearer_id >= MAX_BEARERS) {
295 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
296 name, MAX_BEARERS);
297 return -EINVAL;
298 }
299
300 b = kzalloc(sizeof(*b), GFP_ATOMIC);
301 if (!b)
302 return -ENOMEM;
303
304 strcpy(b->name, name);
305 b->media = m;
306 res = m->enable_media(net, b, attr);
307 if (res) {
308 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
309 name, -res);
310 return -EINVAL;
311 }
312
313 b->identity = bearer_id;
314 b->tolerance = m->tolerance;
315 b->window = m->window;
316 b->domain = disc_domain;
317 b->net_plane = bearer_id + 'A';
318 b->priority = priority;
319
320 res = tipc_disc_create(net, b, &b->bcast_addr);
321 if (res) {
322 bearer_disable(net, b);
323 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
324 name);
325 return -EINVAL;
326 }
327
328 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
329
330 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
331 name,
332 tipc_addr_string_fill(addr_string, disc_domain), priority);
333 return res;
334 }
335
336 /**
337 * tipc_reset_bearer - Reset all links established over this bearer
338 */
339 static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
340 {
341 pr_info("Resetting bearer <%s>\n", b->name);
342 tipc_node_delete_links(net, b->identity);
343 tipc_disc_reset(net, b);
344 return 0;
345 }
346
347 /**
348 * bearer_disable
349 *
350 * Note: This routine assumes caller holds RTNL lock.
351 */
352 static void bearer_disable(struct net *net, struct tipc_bearer *b)
353 {
354 struct tipc_net *tn = net_generic(net, tipc_net_id);
355 u32 i;
356
357 pr_info("Disabling bearer <%s>\n", b->name);
358 b->media->disable_media(b);
359
360 tipc_node_delete_links(net, b->identity);
361 RCU_INIT_POINTER(b->media_ptr, NULL);
362 if (b->link_req)
363 tipc_disc_delete(b->link_req);
364
365 for (i = 0; i < MAX_BEARERS; i++) {
366 if (b == rtnl_dereference(tn->bearer_list[i])) {
367 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
368 break;
369 }
370 }
371 kfree_rcu(b, rcu);
372 }
373
374 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
375 struct nlattr *attr[])
376 {
377 struct net_device *dev;
378 char *driver_name = strchr((const char *)b->name, ':') + 1;
379
380 /* Find device with specified name */
381 dev = dev_get_by_name(net, driver_name);
382 if (!dev)
383 return -ENODEV;
384
385 /* Associate TIPC bearer with L2 bearer */
386 rcu_assign_pointer(b->media_ptr, dev);
387 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
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;
392 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
393 rcu_assign_pointer(dev->tipc_ptr, b);
394 return 0;
395 }
396
397 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
398 *
399 * Mark L2 bearer as inactive so that incoming buffers are thrown away
400 */
401 void tipc_disable_l2_media(struct tipc_bearer *b)
402 {
403 struct net_device *dev;
404
405 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
406 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
407 synchronize_net();
408 dev_put(dev);
409 }
410
411 /**
412 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
413 * @buf: the packet to be sent
414 * @b: the bearer through which the packet is to be sent
415 * @dest: peer destination address
416 */
417 int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
418 struct tipc_bearer *b, struct tipc_media_addr *dest)
419 {
420 struct net_device *dev;
421 int delta;
422
423 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
424 if (!dev)
425 return 0;
426
427 delta = dev->hard_header_len - skb_headroom(skb);
428 if ((delta > 0) &&
429 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
430 kfree_skb(skb);
431 return 0;
432 }
433
434 skb_reset_network_header(skb);
435 skb->dev = dev;
436 skb->protocol = htons(ETH_P_TIPC);
437 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
438 dev->dev_addr, skb->len);
439 dev_queue_xmit(skb);
440 return 0;
441 }
442
443 int tipc_bearer_mtu(struct net *net, u32 bearer_id)
444 {
445 int mtu = 0;
446 struct tipc_bearer *b;
447
448 rcu_read_lock();
449 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
450 if (b)
451 mtu = b->mtu;
452 rcu_read_unlock();
453 return mtu;
454 }
455
456 /* tipc_bearer_xmit_skb - sends buffer to destination over bearer
457 */
458 void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
459 struct sk_buff *skb,
460 struct tipc_media_addr *dest)
461 {
462 struct tipc_net *tn = tipc_net(net);
463 struct tipc_bearer *b;
464
465 rcu_read_lock();
466 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
467 if (likely(b))
468 b->media->send_msg(net, skb, b, dest);
469 rcu_read_unlock();
470 }
471
472 /* tipc_bearer_xmit() -send buffer to destination over bearer
473 */
474 void tipc_bearer_xmit(struct net *net, u32 bearer_id,
475 struct sk_buff_head *xmitq,
476 struct tipc_media_addr *dst)
477 {
478 struct tipc_net *tn = net_generic(net, tipc_net_id);
479 struct tipc_bearer *b;
480 struct sk_buff *skb, *tmp;
481
482 if (skb_queue_empty(xmitq))
483 return;
484
485 rcu_read_lock();
486 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
487 if (likely(b)) {
488 skb_queue_walk_safe(xmitq, skb, tmp) {
489 __skb_dequeue(xmitq);
490 b->media->send_msg(net, skb, b, dst);
491 }
492 }
493 rcu_read_unlock();
494 }
495
496 /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
497 */
498 void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
499 struct sk_buff_head *xmitq)
500 {
501 struct tipc_net *tn = tipc_net(net);
502 int net_id = tn->net_id;
503 struct tipc_bearer *b;
504 struct sk_buff *skb, *tmp;
505 struct tipc_msg *hdr;
506
507 rcu_read_lock();
508 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
509 if (likely(b)) {
510 skb_queue_walk_safe(xmitq, skb, tmp) {
511 hdr = buf_msg(skb);
512 msg_set_non_seq(hdr, 1);
513 msg_set_mc_netid(hdr, net_id);
514 __skb_dequeue(xmitq);
515 b->media->send_msg(net, skb, b, &b->bcast_addr);
516 }
517 }
518 rcu_read_unlock();
519 }
520
521 /**
522 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
523 * @buf: the received packet
524 * @dev: the net device that the packet was received on
525 * @pt: the packet_type structure which was used to register this handler
526 * @orig_dev: the original receive net device in case the device is a bond
527 *
528 * Accept only packets explicitly sent to this node, or broadcast packets;
529 * ignores packets sent using interface multicast, and traffic sent to other
530 * nodes (which can happen if interface is running in promiscuous mode).
531 */
532 static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
533 struct packet_type *pt, struct net_device *orig_dev)
534 {
535 struct tipc_bearer *b;
536
537 rcu_read_lock();
538 b = rcu_dereference_rtnl(dev->tipc_ptr);
539 if (likely(b)) {
540 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
541 buf->next = NULL;
542 tipc_rcv(dev_net(dev), buf, b);
543 rcu_read_unlock();
544 return NET_RX_SUCCESS;
545 }
546 }
547 rcu_read_unlock();
548
549 kfree_skb(buf);
550 return NET_RX_DROP;
551 }
552
553 /**
554 * tipc_l2_device_event - handle device events from network device
555 * @nb: the context of the notification
556 * @evt: the type of event
557 * @ptr: the net device that the event was on
558 *
559 * This function is called by the Ethernet driver in case of link
560 * change event.
561 */
562 static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
563 void *ptr)
564 {
565 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
566 struct net *net = dev_net(dev);
567 struct tipc_bearer *b;
568
569 b = rtnl_dereference(dev->tipc_ptr);
570 if (!b)
571 return NOTIFY_DONE;
572
573 b->mtu = dev->mtu;
574
575 switch (evt) {
576 case NETDEV_CHANGE:
577 if (netif_carrier_ok(dev))
578 break;
579 case NETDEV_GOING_DOWN:
580 case NETDEV_CHANGEMTU:
581 tipc_reset_bearer(net, b);
582 break;
583 case NETDEV_CHANGEADDR:
584 b->media->raw2addr(b, &b->addr,
585 (char *)dev->dev_addr);
586 tipc_reset_bearer(net, b);
587 break;
588 case NETDEV_UNREGISTER:
589 case NETDEV_CHANGENAME:
590 bearer_disable(dev_net(dev), b);
591 break;
592 }
593 return NOTIFY_OK;
594 }
595
596 static struct packet_type tipc_packet_type __read_mostly = {
597 .type = htons(ETH_P_TIPC),
598 .func = tipc_l2_rcv_msg,
599 };
600
601 static struct notifier_block notifier = {
602 .notifier_call = tipc_l2_device_event,
603 .priority = 0,
604 };
605
606 int tipc_bearer_setup(void)
607 {
608 int err;
609
610 err = register_netdevice_notifier(&notifier);
611 if (err)
612 return err;
613 dev_add_pack(&tipc_packet_type);
614 return 0;
615 }
616
617 void tipc_bearer_cleanup(void)
618 {
619 unregister_netdevice_notifier(&notifier);
620 dev_remove_pack(&tipc_packet_type);
621 }
622
623 void tipc_bearer_stop(struct net *net)
624 {
625 struct tipc_net *tn = net_generic(net, tipc_net_id);
626 struct tipc_bearer *b;
627 u32 i;
628
629 for (i = 0; i < MAX_BEARERS; i++) {
630 b = rtnl_dereference(tn->bearer_list[i]);
631 if (b) {
632 bearer_disable(net, b);
633 tn->bearer_list[i] = NULL;
634 }
635 }
636 }
637
638 /* Caller should hold rtnl_lock to protect the bearer */
639 static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
640 struct tipc_bearer *bearer, int nlflags)
641 {
642 void *hdr;
643 struct nlattr *attrs;
644 struct nlattr *prop;
645
646 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
647 nlflags, TIPC_NL_BEARER_GET);
648 if (!hdr)
649 return -EMSGSIZE;
650
651 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
652 if (!attrs)
653 goto msg_full;
654
655 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
656 goto attr_msg_full;
657
658 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
659 if (!prop)
660 goto prop_msg_full;
661 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
662 goto prop_msg_full;
663 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
664 goto prop_msg_full;
665 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
666 goto prop_msg_full;
667
668 nla_nest_end(msg->skb, prop);
669 nla_nest_end(msg->skb, attrs);
670 genlmsg_end(msg->skb, hdr);
671
672 return 0;
673
674 prop_msg_full:
675 nla_nest_cancel(msg->skb, prop);
676 attr_msg_full:
677 nla_nest_cancel(msg->skb, attrs);
678 msg_full:
679 genlmsg_cancel(msg->skb, hdr);
680
681 return -EMSGSIZE;
682 }
683
684 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
685 {
686 int err;
687 int i = cb->args[0];
688 struct tipc_bearer *bearer;
689 struct tipc_nl_msg msg;
690 struct net *net = sock_net(skb->sk);
691 struct tipc_net *tn = net_generic(net, tipc_net_id);
692
693 if (i == MAX_BEARERS)
694 return 0;
695
696 msg.skb = skb;
697 msg.portid = NETLINK_CB(cb->skb).portid;
698 msg.seq = cb->nlh->nlmsg_seq;
699
700 rtnl_lock();
701 for (i = 0; i < MAX_BEARERS; i++) {
702 bearer = rtnl_dereference(tn->bearer_list[i]);
703 if (!bearer)
704 continue;
705
706 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
707 if (err)
708 break;
709 }
710 rtnl_unlock();
711
712 cb->args[0] = i;
713 return skb->len;
714 }
715
716 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
717 {
718 int err;
719 char *name;
720 struct sk_buff *rep;
721 struct tipc_bearer *bearer;
722 struct tipc_nl_msg msg;
723 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
724 struct net *net = genl_info_net(info);
725
726 if (!info->attrs[TIPC_NLA_BEARER])
727 return -EINVAL;
728
729 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
730 info->attrs[TIPC_NLA_BEARER],
731 tipc_nl_bearer_policy);
732 if (err)
733 return err;
734
735 if (!attrs[TIPC_NLA_BEARER_NAME])
736 return -EINVAL;
737 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
738
739 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
740 if (!rep)
741 return -ENOMEM;
742
743 msg.skb = rep;
744 msg.portid = info->snd_portid;
745 msg.seq = info->snd_seq;
746
747 rtnl_lock();
748 bearer = tipc_bearer_find(net, name);
749 if (!bearer) {
750 err = -EINVAL;
751 goto err_out;
752 }
753
754 err = __tipc_nl_add_bearer(&msg, bearer, 0);
755 if (err)
756 goto err_out;
757 rtnl_unlock();
758
759 return genlmsg_reply(rep, info);
760 err_out:
761 rtnl_unlock();
762 nlmsg_free(rep);
763
764 return err;
765 }
766
767 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
768 {
769 int err;
770 char *name;
771 struct tipc_bearer *bearer;
772 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
773 struct net *net = sock_net(skb->sk);
774
775 if (!info->attrs[TIPC_NLA_BEARER])
776 return -EINVAL;
777
778 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
779 info->attrs[TIPC_NLA_BEARER],
780 tipc_nl_bearer_policy);
781 if (err)
782 return err;
783
784 if (!attrs[TIPC_NLA_BEARER_NAME])
785 return -EINVAL;
786
787 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
788
789 rtnl_lock();
790 bearer = tipc_bearer_find(net, name);
791 if (!bearer) {
792 rtnl_unlock();
793 return -EINVAL;
794 }
795
796 bearer_disable(net, bearer);
797 rtnl_unlock();
798
799 return 0;
800 }
801
802 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
803 {
804 int err;
805 char *bearer;
806 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
807 struct net *net = sock_net(skb->sk);
808 struct tipc_net *tn = net_generic(net, tipc_net_id);
809 u32 domain;
810 u32 prio;
811
812 prio = TIPC_MEDIA_LINK_PRI;
813 domain = tn->own_addr & TIPC_CLUSTER_MASK;
814
815 if (!info->attrs[TIPC_NLA_BEARER])
816 return -EINVAL;
817
818 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
819 info->attrs[TIPC_NLA_BEARER],
820 tipc_nl_bearer_policy);
821 if (err)
822 return err;
823
824 if (!attrs[TIPC_NLA_BEARER_NAME])
825 return -EINVAL;
826
827 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
828
829 if (attrs[TIPC_NLA_BEARER_DOMAIN])
830 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
831
832 if (attrs[TIPC_NLA_BEARER_PROP]) {
833 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
834
835 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
836 props);
837 if (err)
838 return err;
839
840 if (props[TIPC_NLA_PROP_PRIO])
841 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
842 }
843
844 rtnl_lock();
845 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
846 if (err) {
847 rtnl_unlock();
848 return err;
849 }
850 rtnl_unlock();
851
852 return 0;
853 }
854
855 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
856 {
857 int err;
858 char *name;
859 struct tipc_bearer *b;
860 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
861 struct net *net = sock_net(skb->sk);
862
863 if (!info->attrs[TIPC_NLA_BEARER])
864 return -EINVAL;
865
866 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
867 info->attrs[TIPC_NLA_BEARER],
868 tipc_nl_bearer_policy);
869 if (err)
870 return err;
871
872 if (!attrs[TIPC_NLA_BEARER_NAME])
873 return -EINVAL;
874 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
875
876 rtnl_lock();
877 b = tipc_bearer_find(net, name);
878 if (!b) {
879 rtnl_unlock();
880 return -EINVAL;
881 }
882
883 if (attrs[TIPC_NLA_BEARER_PROP]) {
884 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
885
886 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
887 props);
888 if (err) {
889 rtnl_unlock();
890 return err;
891 }
892
893 if (props[TIPC_NLA_PROP_TOL])
894 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
895 if (props[TIPC_NLA_PROP_PRIO])
896 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
897 if (props[TIPC_NLA_PROP_WIN])
898 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
899 }
900 rtnl_unlock();
901
902 return 0;
903 }
904
905 static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
906 struct tipc_media *media, int nlflags)
907 {
908 void *hdr;
909 struct nlattr *attrs;
910 struct nlattr *prop;
911
912 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
913 nlflags, TIPC_NL_MEDIA_GET);
914 if (!hdr)
915 return -EMSGSIZE;
916
917 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
918 if (!attrs)
919 goto msg_full;
920
921 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
922 goto attr_msg_full;
923
924 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
925 if (!prop)
926 goto prop_msg_full;
927 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
928 goto prop_msg_full;
929 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
930 goto prop_msg_full;
931 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
932 goto prop_msg_full;
933
934 nla_nest_end(msg->skb, prop);
935 nla_nest_end(msg->skb, attrs);
936 genlmsg_end(msg->skb, hdr);
937
938 return 0;
939
940 prop_msg_full:
941 nla_nest_cancel(msg->skb, prop);
942 attr_msg_full:
943 nla_nest_cancel(msg->skb, attrs);
944 msg_full:
945 genlmsg_cancel(msg->skb, hdr);
946
947 return -EMSGSIZE;
948 }
949
950 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
951 {
952 int err;
953 int i = cb->args[0];
954 struct tipc_nl_msg msg;
955
956 if (i == MAX_MEDIA)
957 return 0;
958
959 msg.skb = skb;
960 msg.portid = NETLINK_CB(cb->skb).portid;
961 msg.seq = cb->nlh->nlmsg_seq;
962
963 rtnl_lock();
964 for (; media_info_array[i] != NULL; i++) {
965 err = __tipc_nl_add_media(&msg, media_info_array[i],
966 NLM_F_MULTI);
967 if (err)
968 break;
969 }
970 rtnl_unlock();
971
972 cb->args[0] = i;
973 return skb->len;
974 }
975
976 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
977 {
978 int err;
979 char *name;
980 struct tipc_nl_msg msg;
981 struct tipc_media *media;
982 struct sk_buff *rep;
983 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
984
985 if (!info->attrs[TIPC_NLA_MEDIA])
986 return -EINVAL;
987
988 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
989 info->attrs[TIPC_NLA_MEDIA],
990 tipc_nl_media_policy);
991 if (err)
992 return err;
993
994 if (!attrs[TIPC_NLA_MEDIA_NAME])
995 return -EINVAL;
996 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
997
998 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
999 if (!rep)
1000 return -ENOMEM;
1001
1002 msg.skb = rep;
1003 msg.portid = info->snd_portid;
1004 msg.seq = info->snd_seq;
1005
1006 rtnl_lock();
1007 media = tipc_media_find(name);
1008 if (!media) {
1009 err = -EINVAL;
1010 goto err_out;
1011 }
1012
1013 err = __tipc_nl_add_media(&msg, media, 0);
1014 if (err)
1015 goto err_out;
1016 rtnl_unlock();
1017
1018 return genlmsg_reply(rep, info);
1019 err_out:
1020 rtnl_unlock();
1021 nlmsg_free(rep);
1022
1023 return err;
1024 }
1025
1026 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1027 {
1028 int err;
1029 char *name;
1030 struct tipc_media *m;
1031 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1032
1033 if (!info->attrs[TIPC_NLA_MEDIA])
1034 return -EINVAL;
1035
1036 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1037 info->attrs[TIPC_NLA_MEDIA],
1038 tipc_nl_media_policy);
1039
1040 if (!attrs[TIPC_NLA_MEDIA_NAME])
1041 return -EINVAL;
1042 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1043
1044 rtnl_lock();
1045 m = tipc_media_find(name);
1046 if (!m) {
1047 rtnl_unlock();
1048 return -EINVAL;
1049 }
1050
1051 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1052 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1053
1054 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1055 props);
1056 if (err) {
1057 rtnl_unlock();
1058 return err;
1059 }
1060
1061 if (props[TIPC_NLA_PROP_TOL])
1062 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1063 if (props[TIPC_NLA_PROP_PRIO])
1064 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1065 if (props[TIPC_NLA_PROP_WIN])
1066 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1067 }
1068 rtnl_unlock();
1069
1070 return 0;
1071 }
(deprecated) Btrfs devel tree