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7db7d9f3 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7a79d717 | 2 | /* Copyright (C) 2014-2019 B.A.T.M.A.N. contributors: |
c5caf4ef LL |
3 | * |
4 | * Linus Lüssing | |
c5caf4ef LL |
5 | */ |
6 | ||
c5caf4ef | 7 | #include "multicast.h" |
1e2c2a4f SE |
8 | #include "main.h" |
9 | ||
10 | #include <linux/atomic.h> | |
9c936e3f | 11 | #include <linux/bitops.h> |
8a4023c5 | 12 | #include <linux/bug.h> |
1e2c2a4f SE |
13 | #include <linux/byteorder/generic.h> |
14 | #include <linux/errno.h> | |
15 | #include <linux/etherdevice.h> | |
b92b94ac | 16 | #include <linux/gfp.h> |
bd2a979e | 17 | #include <linux/icmpv6.h> |
687937ab | 18 | #include <linux/if_bridge.h> |
1e2c2a4f | 19 | #include <linux/if_ether.h> |
bd2a979e | 20 | #include <linux/igmp.h> |
1e2c2a4f | 21 | #include <linux/in.h> |
bd2a979e | 22 | #include <linux/in6.h> |
5c506802 | 23 | #include <linux/inetdevice.h> |
1e2c2a4f SE |
24 | #include <linux/ip.h> |
25 | #include <linux/ipv6.h> | |
cbebd363 | 26 | #include <linux/jiffies.h> |
72f7b2de | 27 | #include <linux/kernel.h> |
7c124391 | 28 | #include <linux/kref.h> |
1e2c2a4f | 29 | #include <linux/list.h> |
2c72d655 | 30 | #include <linux/lockdep.h> |
1e2c2a4f | 31 | #include <linux/netdevice.h> |
53dd9a68 | 32 | #include <linux/netlink.h> |
687937ab | 33 | #include <linux/printk.h> |
1e2c2a4f SE |
34 | #include <linux/rculist.h> |
35 | #include <linux/rcupdate.h> | |
4e3e823b | 36 | #include <linux/seq_file.h> |
1e2c2a4f SE |
37 | #include <linux/skbuff.h> |
38 | #include <linux/slab.h> | |
39 | #include <linux/spinlock.h> | |
40 | #include <linux/stddef.h> | |
41 | #include <linux/string.h> | |
42 | #include <linux/types.h> | |
cbebd363 | 43 | #include <linux/workqueue.h> |
1e2c2a4f | 44 | #include <net/addrconf.h> |
53dd9a68 | 45 | #include <net/genetlink.h> |
687937ab LL |
46 | #include <net/if_inet6.h> |
47 | #include <net/ip.h> | |
1e2c2a4f | 48 | #include <net/ipv6.h> |
53dd9a68 LL |
49 | #include <net/netlink.h> |
50 | #include <net/sock.h> | |
fec149f5 | 51 | #include <uapi/linux/batadv_packet.h> |
53dd9a68 | 52 | #include <uapi/linux/batman_adv.h> |
1e2c2a4f | 53 | |
4e3e823b LL |
54 | #include "hard-interface.h" |
55 | #include "hash.h" | |
ba412080 | 56 | #include "log.h" |
53dd9a68 | 57 | #include "netlink.h" |
32e72744 | 58 | #include "send.h" |
53dd9a68 | 59 | #include "soft-interface.h" |
c5caf4ef | 60 | #include "translation-table.h" |
1f8dce49 | 61 | #include "tvlv.h" |
c5caf4ef | 62 | |
cbebd363 LL |
63 | static void batadv_mcast_mla_update(struct work_struct *work); |
64 | ||
65 | /** | |
7e9a8c2c | 66 | * batadv_mcast_start_timer() - schedule the multicast periodic worker |
cbebd363 LL |
67 | * @bat_priv: the bat priv with all the soft interface information |
68 | */ | |
69 | static void batadv_mcast_start_timer(struct batadv_priv *bat_priv) | |
70 | { | |
71 | queue_delayed_work(batadv_event_workqueue, &bat_priv->mcast.work, | |
72 | msecs_to_jiffies(BATADV_MCAST_WORK_PERIOD)); | |
73 | } | |
74 | ||
6bc45440 LL |
75 | /** |
76 | * batadv_mcast_has_bridge() - check whether the soft-iface is bridged | |
77 | * @bat_priv: the bat priv with all the soft interface information | |
78 | * | |
79 | * Checks whether there is a bridge on top of our soft interface. | |
80 | * | |
81 | * Return: true if there is a bridge, false otherwise. | |
82 | */ | |
83 | static bool batadv_mcast_has_bridge(struct batadv_priv *bat_priv) | |
84 | { | |
85 | struct net_device *upper = bat_priv->soft_iface; | |
86 | ||
87 | rcu_read_lock(); | |
88 | do { | |
89 | upper = netdev_master_upper_dev_get_rcu(upper); | |
90 | } while (upper && !(upper->priv_flags & IFF_EBRIDGE)); | |
91 | rcu_read_unlock(); | |
92 | ||
93 | return upper; | |
94 | } | |
95 | ||
96 | /** | |
97 | * batadv_mcast_mla_flags_get() - get the new multicast flags | |
98 | * @bat_priv: the bat priv with all the soft interface information | |
99 | * | |
100 | * Return: A set of flags for the current/next TVLV, querier and | |
101 | * bridge state. | |
102 | */ | |
103 | static struct batadv_mcast_mla_flags | |
104 | batadv_mcast_mla_flags_get(struct batadv_priv *bat_priv) | |
105 | { | |
106 | struct net_device *dev = bat_priv->soft_iface; | |
107 | struct batadv_mcast_querier_state *qr4, *qr6; | |
108 | struct batadv_mcast_mla_flags mla_flags; | |
109 | ||
110 | memset(&mla_flags, 0, sizeof(mla_flags)); | |
111 | mla_flags.enabled = 1; | |
112 | ||
113 | if (!batadv_mcast_has_bridge(bat_priv)) | |
114 | return mla_flags; | |
115 | ||
116 | mla_flags.bridged = 1; | |
117 | qr4 = &mla_flags.querier_ipv4; | |
118 | qr6 = &mla_flags.querier_ipv6; | |
119 | ||
120 | if (!IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)) | |
121 | pr_warn_once("No bridge IGMP snooping compiled - multicast optimizations disabled\n"); | |
122 | ||
123 | qr4->exists = br_multicast_has_querier_anywhere(dev, ETH_P_IP); | |
124 | qr4->shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IP); | |
125 | ||
126 | qr6->exists = br_multicast_has_querier_anywhere(dev, ETH_P_IPV6); | |
127 | qr6->shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IPV6); | |
128 | ||
129 | mla_flags.tvlv_flags |= BATADV_MCAST_WANT_ALL_UNSNOOPABLES; | |
130 | ||
131 | /* 1) If no querier exists at all, then multicast listeners on | |
132 | * our local TT clients behind the bridge will keep silent. | |
133 | * 2) If the selected querier is on one of our local TT clients, | |
134 | * behind the bridge, then this querier might shadow multicast | |
135 | * listeners on our local TT clients, behind this bridge. | |
136 | * | |
137 | * In both cases, we will signalize other batman nodes that | |
138 | * we need all multicast traffic of the according protocol. | |
139 | */ | |
140 | if (!qr4->exists || qr4->shadowing) | |
141 | mla_flags.tvlv_flags |= BATADV_MCAST_WANT_ALL_IPV4; | |
142 | ||
143 | if (!qr6->exists || qr6->shadowing) | |
144 | mla_flags.tvlv_flags |= BATADV_MCAST_WANT_ALL_IPV6; | |
145 | ||
146 | return mla_flags; | |
147 | } | |
148 | ||
687937ab | 149 | /** |
7e9a8c2c | 150 | * batadv_mcast_get_bridge() - get the bridge on top of the softif if it exists |
687937ab LL |
151 | * @soft_iface: netdev struct of the mesh interface |
152 | * | |
153 | * If the given soft interface has a bridge on top then the refcount | |
154 | * of the according net device is increased. | |
155 | * | |
156 | * Return: NULL if no such bridge exists. Otherwise the net device of the | |
157 | * bridge. | |
158 | */ | |
159 | static struct net_device *batadv_mcast_get_bridge(struct net_device *soft_iface) | |
160 | { | |
161 | struct net_device *upper = soft_iface; | |
162 | ||
163 | rcu_read_lock(); | |
164 | do { | |
165 | upper = netdev_master_upper_dev_get_rcu(upper); | |
166 | } while (upper && !(upper->priv_flags & IFF_EBRIDGE)); | |
167 | ||
168 | if (upper) | |
169 | dev_hold(upper); | |
170 | rcu_read_unlock(); | |
171 | ||
172 | return upper; | |
173 | } | |
174 | ||
6b253603 | 175 | /** |
5c506802 LL |
176 | * batadv_mcast_mla_is_duplicate() - check whether an address is in a list |
177 | * @mcast_addr: the multicast address to check | |
178 | * @mcast_list: the list with multicast addresses to search in | |
6b253603 | 179 | * |
5c506802 LL |
180 | * Return: true if the given address is already in the given list. |
181 | * Otherwise returns false. | |
6b253603 | 182 | */ |
5c506802 LL |
183 | static bool batadv_mcast_mla_is_duplicate(u8 *mcast_addr, |
184 | struct hlist_head *mcast_list) | |
6b253603 | 185 | { |
5c506802 | 186 | struct batadv_hw_addr *mcast_entry; |
6b253603 | 187 | |
5c506802 LL |
188 | hlist_for_each_entry(mcast_entry, mcast_list, list) |
189 | if (batadv_compare_eth(mcast_entry->addr, mcast_addr)) | |
190 | return true; | |
191 | ||
192 | return false; | |
6b253603 LL |
193 | } |
194 | ||
195 | /** | |
5c506802 LL |
196 | * batadv_mcast_mla_softif_get_ipv4() - get softif IPv4 multicast listeners |
197 | * @dev: the device to collect multicast addresses from | |
198 | * @mcast_list: a list to put found addresses into | |
199 | * @flags: flags indicating the new multicast state | |
6b253603 | 200 | * |
5c506802 LL |
201 | * Collects multicast addresses of IPv4 multicast listeners residing |
202 | * on this kernel on the given soft interface, dev, in | |
203 | * the given mcast_list. In general, multicast listeners provided by | |
204 | * your multicast receiving applications run directly on this node. | |
205 | * | |
206 | * Return: -ENOMEM on memory allocation error or the number of | |
207 | * items added to the mcast_list otherwise. | |
6b253603 | 208 | */ |
5c506802 LL |
209 | static int |
210 | batadv_mcast_mla_softif_get_ipv4(struct net_device *dev, | |
211 | struct hlist_head *mcast_list, | |
212 | struct batadv_mcast_mla_flags *flags) | |
6b253603 | 213 | { |
5c506802 LL |
214 | struct batadv_hw_addr *new; |
215 | struct in_device *in_dev; | |
216 | u8 mcast_addr[ETH_ALEN]; | |
217 | struct ip_mc_list *pmc; | |
218 | int ret = 0; | |
219 | ||
220 | if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_IPV4) | |
221 | return 0; | |
222 | ||
223 | rcu_read_lock(); | |
6b253603 | 224 | |
5c506802 LL |
225 | in_dev = __in_dev_get_rcu(dev); |
226 | if (!in_dev) { | |
227 | rcu_read_unlock(); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | for (pmc = rcu_dereference(in_dev->mc_list); pmc; | |
232 | pmc = rcu_dereference(pmc->next_rcu)) { | |
390dcd48 LL |
233 | if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES && |
234 | ipv4_is_local_multicast(pmc->multiaddr)) | |
235 | continue; | |
236 | ||
5c506802 LL |
237 | ip_eth_mc_map(pmc->multiaddr, mcast_addr); |
238 | ||
239 | if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list)) | |
240 | continue; | |
241 | ||
242 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
243 | if (!new) { | |
244 | ret = -ENOMEM; | |
245 | break; | |
246 | } | |
247 | ||
248 | ether_addr_copy(new->addr, mcast_addr); | |
249 | hlist_add_head(&new->list, mcast_list); | |
250 | ret++; | |
251 | } | |
252 | rcu_read_unlock(); | |
253 | ||
254 | return ret; | |
6b253603 LL |
255 | } |
256 | ||
c5caf4ef | 257 | /** |
5c506802 | 258 | * batadv_mcast_mla_softif_get_ipv6() - get softif IPv6 multicast listeners |
c5caf4ef LL |
259 | * @dev: the device to collect multicast addresses from |
260 | * @mcast_list: a list to put found addresses into | |
6bc45440 | 261 | * @flags: flags indicating the new multicast state |
c5caf4ef | 262 | * |
5c506802 | 263 | * Collects multicast addresses of IPv6 multicast listeners residing |
687937ab LL |
264 | * on this kernel on the given soft interface, dev, in |
265 | * the given mcast_list. In general, multicast listeners provided by | |
266 | * your multicast receiving applications run directly on this node. | |
267 | * | |
62fe710f | 268 | * Return: -ENOMEM on memory allocation error or the number of |
c5caf4ef LL |
269 | * items added to the mcast_list otherwise. |
270 | */ | |
5c506802 | 271 | #if IS_ENABLED(CONFIG_IPV6) |
6bc45440 | 272 | static int |
5c506802 LL |
273 | batadv_mcast_mla_softif_get_ipv6(struct net_device *dev, |
274 | struct hlist_head *mcast_list, | |
275 | struct batadv_mcast_mla_flags *flags) | |
c5caf4ef | 276 | { |
c5caf4ef | 277 | struct batadv_hw_addr *new; |
5c506802 LL |
278 | struct inet6_dev *in6_dev; |
279 | u8 mcast_addr[ETH_ALEN]; | |
280 | struct ifmcaddr6 *pmc6; | |
c5caf4ef LL |
281 | int ret = 0; |
282 | ||
5c506802 LL |
283 | if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_IPV6) |
284 | return 0; | |
285 | ||
286 | rcu_read_lock(); | |
287 | ||
288 | in6_dev = __in6_dev_get(dev); | |
289 | if (!in6_dev) { | |
290 | rcu_read_unlock(); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | read_lock_bh(&in6_dev->lock); | |
295 | for (pmc6 = in6_dev->mc_list; pmc6; pmc6 = pmc6->next) { | |
296 | if (IPV6_ADDR_MC_SCOPE(&pmc6->mca_addr) < | |
297 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
6b253603 LL |
298 | continue; |
299 | ||
390dcd48 LL |
300 | if (flags->tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES && |
301 | ipv6_addr_is_ll_all_nodes(&pmc6->mca_addr)) | |
302 | continue; | |
303 | ||
5c506802 LL |
304 | ipv6_eth_mc_map(&pmc6->mca_addr, mcast_addr); |
305 | ||
306 | if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list)) | |
6b253603 LL |
307 | continue; |
308 | ||
c5caf4ef LL |
309 | new = kmalloc(sizeof(*new), GFP_ATOMIC); |
310 | if (!new) { | |
311 | ret = -ENOMEM; | |
312 | break; | |
313 | } | |
314 | ||
5c506802 | 315 | ether_addr_copy(new->addr, mcast_addr); |
c5caf4ef LL |
316 | hlist_add_head(&new->list, mcast_list); |
317 | ret++; | |
318 | } | |
5c506802 LL |
319 | read_unlock_bh(&in6_dev->lock); |
320 | rcu_read_unlock(); | |
c5caf4ef LL |
321 | |
322 | return ret; | |
323 | } | |
5c506802 LL |
324 | #else |
325 | static inline int | |
326 | batadv_mcast_mla_softif_get_ipv6(struct net_device *dev, | |
327 | struct hlist_head *mcast_list, | |
328 | struct batadv_mcast_mla_flags *flags) | |
329 | { | |
330 | return 0; | |
331 | } | |
332 | #endif | |
c5caf4ef LL |
333 | |
334 | /** | |
5c506802 LL |
335 | * batadv_mcast_mla_softif_get() - get softif multicast listeners |
336 | * @dev: the device to collect multicast addresses from | |
337 | * @mcast_list: a list to put found addresses into | |
338 | * @flags: flags indicating the new multicast state | |
c5caf4ef | 339 | * |
5c506802 LL |
340 | * Collects multicast addresses of multicast listeners residing |
341 | * on this kernel on the given soft interface, dev, in | |
342 | * the given mcast_list. In general, multicast listeners provided by | |
343 | * your multicast receiving applications run directly on this node. | |
344 | * | |
345 | * If there is a bridge interface on top of dev, collects from that one | |
346 | * instead. Just like with IP addresses and routes, multicast listeners | |
347 | * will(/should) register to the bridge interface instead of an | |
348 | * enslaved bat0. | |
349 | * | |
350 | * Return: -ENOMEM on memory allocation error or the number of | |
351 | * items added to the mcast_list otherwise. | |
c5caf4ef | 352 | */ |
5c506802 LL |
353 | static int |
354 | batadv_mcast_mla_softif_get(struct net_device *dev, | |
355 | struct hlist_head *mcast_list, | |
356 | struct batadv_mcast_mla_flags *flags) | |
c5caf4ef | 357 | { |
5c506802 LL |
358 | struct net_device *bridge = batadv_mcast_get_bridge(dev); |
359 | int ret4, ret6 = 0; | |
c5caf4ef | 360 | |
5c506802 LL |
361 | if (bridge) |
362 | dev = bridge; | |
c5caf4ef | 363 | |
5c506802 LL |
364 | ret4 = batadv_mcast_mla_softif_get_ipv4(dev, mcast_list, flags); |
365 | if (ret4 < 0) | |
366 | goto out; | |
367 | ||
368 | ret6 = batadv_mcast_mla_softif_get_ipv6(dev, mcast_list, flags); | |
369 | if (ret6 < 0) { | |
370 | ret4 = 0; | |
371 | goto out; | |
372 | } | |
373 | ||
374 | out: | |
375 | if (bridge) | |
376 | dev_put(bridge); | |
377 | ||
378 | return ret4 + ret6; | |
c5caf4ef LL |
379 | } |
380 | ||
687937ab | 381 | /** |
7e9a8c2c | 382 | * batadv_mcast_mla_br_addr_cpy() - copy a bridge multicast address |
687937ab LL |
383 | * @dst: destination to write to - a multicast MAC address |
384 | * @src: source to read from - a multicast IP address | |
385 | * | |
386 | * Converts a given multicast IPv4/IPv6 address from a bridge | |
387 | * to its matching multicast MAC address and copies it into the given | |
388 | * destination buffer. | |
389 | * | |
390 | * Caller needs to make sure the destination buffer can hold | |
391 | * at least ETH_ALEN bytes. | |
392 | */ | |
393 | static void batadv_mcast_mla_br_addr_cpy(char *dst, const struct br_ip *src) | |
394 | { | |
395 | if (src->proto == htons(ETH_P_IP)) | |
396 | ip_eth_mc_map(src->u.ip4, dst); | |
397 | #if IS_ENABLED(CONFIG_IPV6) | |
398 | else if (src->proto == htons(ETH_P_IPV6)) | |
399 | ipv6_eth_mc_map(&src->u.ip6, dst); | |
400 | #endif | |
401 | else | |
402 | eth_zero_addr(dst); | |
403 | } | |
404 | ||
405 | /** | |
7e9a8c2c | 406 | * batadv_mcast_mla_bridge_get() - get bridged-in multicast listeners |
687937ab LL |
407 | * @dev: a bridge slave whose bridge to collect multicast addresses from |
408 | * @mcast_list: a list to put found addresses into | |
6bc45440 | 409 | * @flags: flags indicating the new multicast state |
687937ab LL |
410 | * |
411 | * Collects multicast addresses of multicast listeners residing | |
412 | * on foreign, non-mesh devices which we gave access to our mesh via | |
413 | * a bridge on top of the given soft interface, dev, in the given | |
414 | * mcast_list. | |
415 | * | |
416 | * Return: -ENOMEM on memory allocation error or the number of | |
417 | * items added to the mcast_list otherwise. | |
418 | */ | |
6bc45440 LL |
419 | static int batadv_mcast_mla_bridge_get(struct net_device *dev, |
420 | struct hlist_head *mcast_list, | |
421 | struct batadv_mcast_mla_flags *flags) | |
687937ab LL |
422 | { |
423 | struct list_head bridge_mcast_list = LIST_HEAD_INIT(bridge_mcast_list); | |
424 | struct br_ip_list *br_ip_entry, *tmp; | |
390dcd48 | 425 | u8 tvlv_flags = flags->tvlv_flags; |
687937ab LL |
426 | struct batadv_hw_addr *new; |
427 | u8 mcast_addr[ETH_ALEN]; | |
428 | int ret; | |
429 | ||
430 | /* we don't need to detect these devices/listeners, the IGMP/MLD | |
431 | * snooping code of the Linux bridge already does that for us | |
432 | */ | |
433 | ret = br_multicast_list_adjacent(dev, &bridge_mcast_list); | |
434 | if (ret < 0) | |
435 | goto out; | |
436 | ||
437 | list_for_each_entry(br_ip_entry, &bridge_mcast_list, list) { | |
390dcd48 LL |
438 | if (br_ip_entry->addr.proto == htons(ETH_P_IP)) { |
439 | if (tvlv_flags & BATADV_MCAST_WANT_ALL_IPV4) | |
440 | continue; | |
6b253603 | 441 | |
390dcd48 LL |
442 | if (tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES && |
443 | ipv4_is_local_multicast(br_ip_entry->addr.u.ip4)) | |
444 | continue; | |
445 | } | |
446 | ||
447 | #if IS_ENABLED(CONFIG_IPV6) | |
448 | if (br_ip_entry->addr.proto == htons(ETH_P_IPV6)) { | |
449 | if (tvlv_flags & BATADV_MCAST_WANT_ALL_IPV6) | |
450 | continue; | |
451 | ||
452 | if (tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES && | |
453 | ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.u.ip6)) | |
454 | continue; | |
455 | } | |
456 | #endif | |
6b253603 | 457 | |
687937ab LL |
458 | batadv_mcast_mla_br_addr_cpy(mcast_addr, &br_ip_entry->addr); |
459 | if (batadv_mcast_mla_is_duplicate(mcast_addr, mcast_list)) | |
460 | continue; | |
461 | ||
462 | new = kmalloc(sizeof(*new), GFP_ATOMIC); | |
463 | if (!new) { | |
464 | ret = -ENOMEM; | |
465 | break; | |
466 | } | |
467 | ||
468 | ether_addr_copy(new->addr, mcast_addr); | |
469 | hlist_add_head(&new->list, mcast_list); | |
470 | } | |
471 | ||
472 | out: | |
473 | list_for_each_entry_safe(br_ip_entry, tmp, &bridge_mcast_list, list) { | |
474 | list_del(&br_ip_entry->list); | |
475 | kfree(br_ip_entry); | |
476 | } | |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
c5caf4ef | 481 | /** |
7e9a8c2c | 482 | * batadv_mcast_mla_list_free() - free a list of multicast addresses |
c5caf4ef LL |
483 | * @mcast_list: the list to free |
484 | * | |
485 | * Removes and frees all items in the given mcast_list. | |
486 | */ | |
b7769763 | 487 | static void batadv_mcast_mla_list_free(struct hlist_head *mcast_list) |
c5caf4ef LL |
488 | { |
489 | struct batadv_hw_addr *mcast_entry; | |
490 | struct hlist_node *tmp; | |
491 | ||
492 | hlist_for_each_entry_safe(mcast_entry, tmp, mcast_list, list) { | |
493 | hlist_del(&mcast_entry->list); | |
494 | kfree(mcast_entry); | |
495 | } | |
496 | } | |
497 | ||
498 | /** | |
7e9a8c2c | 499 | * batadv_mcast_mla_tt_retract() - clean up multicast listener announcements |
c5caf4ef LL |
500 | * @bat_priv: the bat priv with all the soft interface information |
501 | * @mcast_list: a list of addresses which should _not_ be removed | |
502 | * | |
503 | * Retracts the announcement of any multicast listener from the | |
504 | * translation table except the ones listed in the given mcast_list. | |
505 | * | |
506 | * If mcast_list is NULL then all are retracted. | |
507 | */ | |
508 | static void batadv_mcast_mla_tt_retract(struct batadv_priv *bat_priv, | |
509 | struct hlist_head *mcast_list) | |
510 | { | |
511 | struct batadv_hw_addr *mcast_entry; | |
512 | struct hlist_node *tmp; | |
513 | ||
514 | hlist_for_each_entry_safe(mcast_entry, tmp, &bat_priv->mcast.mla_list, | |
515 | list) { | |
516 | if (mcast_list && | |
517 | batadv_mcast_mla_is_duplicate(mcast_entry->addr, | |
518 | mcast_list)) | |
519 | continue; | |
520 | ||
521 | batadv_tt_local_remove(bat_priv, mcast_entry->addr, | |
522 | BATADV_NO_FLAGS, | |
523 | "mcast TT outdated", false); | |
524 | ||
525 | hlist_del(&mcast_entry->list); | |
526 | kfree(mcast_entry); | |
527 | } | |
528 | } | |
529 | ||
530 | /** | |
7e9a8c2c | 531 | * batadv_mcast_mla_tt_add() - add multicast listener announcements |
c5caf4ef LL |
532 | * @bat_priv: the bat priv with all the soft interface information |
533 | * @mcast_list: a list of addresses which are going to get added | |
534 | * | |
535 | * Adds multicast listener announcements from the given mcast_list to the | |
536 | * translation table if they have not been added yet. | |
537 | */ | |
538 | static void batadv_mcast_mla_tt_add(struct batadv_priv *bat_priv, | |
539 | struct hlist_head *mcast_list) | |
540 | { | |
541 | struct batadv_hw_addr *mcast_entry; | |
542 | struct hlist_node *tmp; | |
543 | ||
544 | if (!mcast_list) | |
545 | return; | |
546 | ||
547 | hlist_for_each_entry_safe(mcast_entry, tmp, mcast_list, list) { | |
548 | if (batadv_mcast_mla_is_duplicate(mcast_entry->addr, | |
549 | &bat_priv->mcast.mla_list)) | |
550 | continue; | |
551 | ||
552 | if (!batadv_tt_local_add(bat_priv->soft_iface, | |
553 | mcast_entry->addr, BATADV_NO_FLAGS, | |
554 | BATADV_NULL_IFINDEX, BATADV_NO_MARK)) | |
555 | continue; | |
556 | ||
557 | hlist_del(&mcast_entry->list); | |
558 | hlist_add_head(&mcast_entry->list, &bat_priv->mcast.mla_list); | |
559 | } | |
560 | } | |
561 | ||
72f7b2de | 562 | /** |
7e9a8c2c SE |
563 | * batadv_mcast_querier_log() - debug output regarding the querier status on |
564 | * link | |
72f7b2de LL |
565 | * @bat_priv: the bat priv with all the soft interface information |
566 | * @str_proto: a string for the querier protocol (e.g. "IGMP" or "MLD") | |
567 | * @old_state: the previous querier state on our link | |
568 | * @new_state: the new querier state on our link | |
569 | * | |
570 | * Outputs debug messages to the logging facility with log level 'mcast' | |
571 | * regarding changes to the querier status on the link which are relevant | |
572 | * to our multicast optimizations. | |
573 | * | |
574 | * Usually this is about whether a querier appeared or vanished in | |
575 | * our mesh or whether the querier is in the suboptimal position of being | |
576 | * behind our local bridge segment: Snooping switches will directly | |
577 | * forward listener reports to the querier, therefore batman-adv and | |
578 | * the bridge will potentially not see these listeners - the querier is | |
579 | * potentially shadowing listeners from us then. | |
580 | * | |
581 | * This is only interesting for nodes with a bridge on top of their | |
582 | * soft interface. | |
583 | */ | |
584 | static void | |
585 | batadv_mcast_querier_log(struct batadv_priv *bat_priv, char *str_proto, | |
586 | struct batadv_mcast_querier_state *old_state, | |
587 | struct batadv_mcast_querier_state *new_state) | |
588 | { | |
589 | if (!old_state->exists && new_state->exists) | |
590 | batadv_info(bat_priv->soft_iface, "%s Querier appeared\n", | |
591 | str_proto); | |
592 | else if (old_state->exists && !new_state->exists) | |
593 | batadv_info(bat_priv->soft_iface, | |
594 | "%s Querier disappeared - multicast optimizations disabled\n", | |
595 | str_proto); | |
6bc45440 | 596 | else if (!bat_priv->mcast.mla_flags.bridged && !new_state->exists) |
72f7b2de LL |
597 | batadv_info(bat_priv->soft_iface, |
598 | "No %s Querier present - multicast optimizations disabled\n", | |
599 | str_proto); | |
600 | ||
601 | if (new_state->exists) { | |
602 | if ((!old_state->shadowing && new_state->shadowing) || | |
603 | (!old_state->exists && new_state->shadowing)) | |
604 | batadv_dbg(BATADV_DBG_MCAST, bat_priv, | |
605 | "%s Querier is behind our bridged segment: Might shadow listeners\n", | |
606 | str_proto); | |
607 | else if (old_state->shadowing && !new_state->shadowing) | |
608 | batadv_dbg(BATADV_DBG_MCAST, bat_priv, | |
609 | "%s Querier is not behind our bridged segment\n", | |
610 | str_proto); | |
611 | } | |
612 | } | |
613 | ||
614 | /** | |
7e9a8c2c SE |
615 | * batadv_mcast_bridge_log() - debug output for topology changes in bridged |
616 | * setups | |
72f7b2de | 617 | * @bat_priv: the bat priv with all the soft interface information |
6bc45440 | 618 | * @new_flags: flags indicating the new multicast state |
72f7b2de LL |
619 | * |
620 | * If no bridges are ever used on this node, then this function does nothing. | |
621 | * | |
622 | * Otherwise this function outputs debug information to the 'mcast' log level | |
623 | * which might be relevant to our multicast optimizations. | |
624 | * | |
625 | * More precisely, it outputs information when a bridge interface is added or | |
626 | * removed from a soft interface. And when a bridge is present, it further | |
627 | * outputs information about the querier state which is relevant for the | |
628 | * multicast flags this node is going to set. | |
629 | */ | |
630 | static void | |
6bc45440 LL |
631 | batadv_mcast_bridge_log(struct batadv_priv *bat_priv, |
632 | struct batadv_mcast_mla_flags *new_flags) | |
72f7b2de | 633 | { |
6bc45440 LL |
634 | struct batadv_mcast_mla_flags *old_flags = &bat_priv->mcast.mla_flags; |
635 | ||
636 | if (!old_flags->bridged && new_flags->bridged) | |
72f7b2de LL |
637 | batadv_dbg(BATADV_DBG_MCAST, bat_priv, |
638 | "Bridge added: Setting Unsnoopables(U)-flag\n"); | |
6bc45440 | 639 | else if (old_flags->bridged && !new_flags->bridged) |
72f7b2de LL |
640 | batadv_dbg(BATADV_DBG_MCAST, bat_priv, |
641 | "Bridge removed: Unsetting Unsnoopables(U)-flag\n"); | |
642 | ||
6bc45440 | 643 | if (new_flags->bridged) { |
72f7b2de | 644 | batadv_mcast_querier_log(bat_priv, "IGMP", |
6bc45440 LL |
645 | &old_flags->querier_ipv4, |
646 | &new_flags->querier_ipv4); | |
72f7b2de | 647 | batadv_mcast_querier_log(bat_priv, "MLD", |
6bc45440 LL |
648 | &old_flags->querier_ipv6, |
649 | &new_flags->querier_ipv6); | |
72f7b2de LL |
650 | } |
651 | } | |
652 | ||
653 | /** | |
7e9a8c2c | 654 | * batadv_mcast_flags_logs() - output debug information about mcast flag changes |
72f7b2de | 655 | * @bat_priv: the bat priv with all the soft interface information |
6bc45440 | 656 | * @flags: TVLV flags indicating the new multicast state |
72f7b2de | 657 | * |
6bc45440 LL |
658 | * Whenever the multicast TVLV flags this nodes announces change this notifies |
659 | * userspace via the 'mcast' log level. | |
72f7b2de LL |
660 | */ |
661 | static void batadv_mcast_flags_log(struct batadv_priv *bat_priv, u8 flags) | |
662 | { | |
6bc45440 LL |
663 | bool old_enabled = bat_priv->mcast.mla_flags.enabled; |
664 | u8 old_flags = bat_priv->mcast.mla_flags.tvlv_flags; | |
72f7b2de LL |
665 | char str_old_flags[] = "[...]"; |
666 | ||
667 | sprintf(str_old_flags, "[%c%c%c]", | |
668 | (old_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.', | |
669 | (old_flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.', | |
670 | (old_flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.'); | |
671 | ||
672 | batadv_dbg(BATADV_DBG_MCAST, bat_priv, | |
673 | "Changing multicast flags from '%s' to '[%c%c%c]'\n", | |
6bc45440 | 674 | old_enabled ? str_old_flags : "<undefined>", |
72f7b2de LL |
675 | (flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.', |
676 | (flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.', | |
677 | (flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.'); | |
678 | } | |
679 | ||
60432d75 | 680 | /** |
6bc45440 | 681 | * batadv_mcast_mla_flags_update() - update multicast flags |
60432d75 | 682 | * @bat_priv: the bat priv with all the soft interface information |
6bc45440 | 683 | * @flags: flags indicating the new multicast state |
60432d75 LL |
684 | * |
685 | * Updates the own multicast tvlv with our current multicast related settings, | |
686 | * capabilities and inabilities. | |
60432d75 | 687 | */ |
6bc45440 LL |
688 | static void |
689 | batadv_mcast_mla_flags_update(struct batadv_priv *bat_priv, | |
690 | struct batadv_mcast_mla_flags *flags) | |
60432d75 LL |
691 | { |
692 | struct batadv_tvlv_mcast_data mcast_data; | |
60432d75 | 693 | |
6bc45440 LL |
694 | if (!memcmp(flags, &bat_priv->mcast.mla_flags, sizeof(*flags))) |
695 | return; | |
72f7b2de | 696 | |
6bc45440 LL |
697 | batadv_mcast_bridge_log(bat_priv, flags); |
698 | batadv_mcast_flags_log(bat_priv, flags->tvlv_flags); | |
72f7b2de | 699 | |
6bc45440 LL |
700 | mcast_data.flags = flags->tvlv_flags; |
701 | memset(mcast_data.reserved, 0, sizeof(mcast_data.reserved)); | |
72f7b2de | 702 | |
6bc45440 LL |
703 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_MCAST, 2, |
704 | &mcast_data, sizeof(mcast_data)); | |
60432d75 | 705 | |
6bc45440 | 706 | bat_priv->mcast.mla_flags = *flags; |
60432d75 LL |
707 | } |
708 | ||
c5caf4ef | 709 | /** |
7e9a8c2c | 710 | * __batadv_mcast_mla_update() - update the own MLAs |
c5caf4ef LL |
711 | * @bat_priv: the bat priv with all the soft interface information |
712 | * | |
60432d75 LL |
713 | * Updates the own multicast listener announcements in the translation |
714 | * table as well as the own, announced multicast tvlv container. | |
cbebd363 LL |
715 | * |
716 | * Note that non-conflicting reads and writes to bat_priv->mcast.mla_list | |
717 | * in batadv_mcast_mla_tt_retract() and batadv_mcast_mla_tt_add() are | |
718 | * ensured by the non-parallel execution of the worker this function | |
719 | * belongs to. | |
c5caf4ef | 720 | */ |
cbebd363 | 721 | static void __batadv_mcast_mla_update(struct batadv_priv *bat_priv) |
c5caf4ef LL |
722 | { |
723 | struct net_device *soft_iface = bat_priv->soft_iface; | |
724 | struct hlist_head mcast_list = HLIST_HEAD_INIT; | |
6bc45440 | 725 | struct batadv_mcast_mla_flags flags; |
c5caf4ef LL |
726 | int ret; |
727 | ||
6bc45440 | 728 | flags = batadv_mcast_mla_flags_get(bat_priv); |
c5caf4ef | 729 | |
6bc45440 | 730 | ret = batadv_mcast_mla_softif_get(soft_iface, &mcast_list, &flags); |
c5caf4ef LL |
731 | if (ret < 0) |
732 | goto out; | |
733 | ||
6bc45440 | 734 | ret = batadv_mcast_mla_bridge_get(soft_iface, &mcast_list, &flags); |
687937ab LL |
735 | if (ret < 0) |
736 | goto out; | |
737 | ||
6bc45440 | 738 | spin_lock(&bat_priv->mcast.mla_lock); |
c5caf4ef LL |
739 | batadv_mcast_mla_tt_retract(bat_priv, &mcast_list); |
740 | batadv_mcast_mla_tt_add(bat_priv, &mcast_list); | |
6bc45440 LL |
741 | batadv_mcast_mla_flags_update(bat_priv, &flags); |
742 | spin_unlock(&bat_priv->mcast.mla_lock); | |
c5caf4ef LL |
743 | |
744 | out: | |
b7769763 | 745 | batadv_mcast_mla_list_free(&mcast_list); |
c5caf4ef LL |
746 | } |
747 | ||
cbebd363 | 748 | /** |
7e9a8c2c | 749 | * batadv_mcast_mla_update() - update the own MLAs |
cbebd363 LL |
750 | * @work: kernel work struct |
751 | * | |
752 | * Updates the own multicast listener announcements in the translation | |
753 | * table as well as the own, announced multicast tvlv container. | |
754 | * | |
755 | * In the end, reschedules the work timer. | |
756 | */ | |
757 | static void batadv_mcast_mla_update(struct work_struct *work) | |
758 | { | |
759 | struct delayed_work *delayed_work; | |
760 | struct batadv_priv_mcast *priv_mcast; | |
761 | struct batadv_priv *bat_priv; | |
762 | ||
763 | delayed_work = to_delayed_work(work); | |
764 | priv_mcast = container_of(delayed_work, struct batadv_priv_mcast, work); | |
765 | bat_priv = container_of(priv_mcast, struct batadv_priv, mcast); | |
766 | ||
767 | __batadv_mcast_mla_update(bat_priv); | |
768 | batadv_mcast_start_timer(bat_priv); | |
769 | } | |
770 | ||
bd2a979e | 771 | /** |
7e9a8c2c | 772 | * batadv_mcast_is_report_ipv4() - check for IGMP reports |
bd2a979e LL |
773 | * @skb: the ethernet frame destined for the mesh |
774 | * | |
775 | * This call might reallocate skb data. | |
776 | * | |
777 | * Checks whether the given frame is a valid IGMP report. | |
778 | * | |
779 | * Return: If so then true, otherwise false. | |
780 | */ | |
781 | static bool batadv_mcast_is_report_ipv4(struct sk_buff *skb) | |
782 | { | |
ba5ea614 | 783 | if (ip_mc_check_igmp(skb) < 0) |
bd2a979e LL |
784 | return false; |
785 | ||
786 | switch (igmp_hdr(skb)->type) { | |
787 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
788 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
789 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
790 | return true; | |
791 | } | |
792 | ||
793 | return false; | |
794 | } | |
795 | ||
ab49886e | 796 | /** |
7e9a8c2c SE |
797 | * batadv_mcast_forw_mode_check_ipv4() - check for optimized forwarding |
798 | * potential | |
ab49886e LL |
799 | * @bat_priv: the bat priv with all the soft interface information |
800 | * @skb: the IPv4 packet to check | |
801 | * @is_unsnoopable: stores whether the destination is snoopable | |
802 | * | |
803 | * Checks whether the given IPv4 packet has the potential to be forwarded with a | |
804 | * mode more optimal than classic flooding. | |
805 | * | |
62fe710f SE |
806 | * Return: If so then 0. Otherwise -EINVAL or -ENOMEM in case of memory |
807 | * allocation failure. | |
ab49886e LL |
808 | */ |
809 | static int batadv_mcast_forw_mode_check_ipv4(struct batadv_priv *bat_priv, | |
810 | struct sk_buff *skb, | |
811 | bool *is_unsnoopable) | |
812 | { | |
813 | struct iphdr *iphdr; | |
814 | ||
815 | /* We might fail due to out-of-memory -> drop it */ | |
816 | if (!pskb_may_pull(skb, sizeof(struct ethhdr) + sizeof(*iphdr))) | |
817 | return -ENOMEM; | |
818 | ||
bd2a979e LL |
819 | if (batadv_mcast_is_report_ipv4(skb)) |
820 | return -EINVAL; | |
821 | ||
ab49886e LL |
822 | iphdr = ip_hdr(skb); |
823 | ||
824 | /* TODO: Implement Multicast Router Discovery (RFC4286), | |
825 | * then allow scope > link local, too | |
826 | */ | |
827 | if (!ipv4_is_local_multicast(iphdr->daddr)) | |
828 | return -EINVAL; | |
829 | ||
830 | /* link-local multicast listeners behind a bridge are | |
831 | * not snoopable (see RFC4541, section 2.1.2.2) | |
832 | */ | |
833 | *is_unsnoopable = true; | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
bd2a979e | 838 | /** |
7e9a8c2c | 839 | * batadv_mcast_is_report_ipv6() - check for MLD reports |
bd2a979e LL |
840 | * @skb: the ethernet frame destined for the mesh |
841 | * | |
842 | * This call might reallocate skb data. | |
843 | * | |
844 | * Checks whether the given frame is a valid MLD report. | |
845 | * | |
846 | * Return: If so then true, otherwise false. | |
847 | */ | |
848 | static bool batadv_mcast_is_report_ipv6(struct sk_buff *skb) | |
849 | { | |
ba5ea614 | 850 | if (ipv6_mc_check_mld(skb) < 0) |
bd2a979e LL |
851 | return false; |
852 | ||
853 | switch (icmp6_hdr(skb)->icmp6_type) { | |
854 | case ICMPV6_MGM_REPORT: | |
855 | case ICMPV6_MLD2_REPORT: | |
856 | return true; | |
857 | } | |
858 | ||
859 | return false; | |
860 | } | |
861 | ||
1d8ab8d3 | 862 | /** |
7e9a8c2c SE |
863 | * batadv_mcast_forw_mode_check_ipv6() - check for optimized forwarding |
864 | * potential | |
1d8ab8d3 LL |
865 | * @bat_priv: the bat priv with all the soft interface information |
866 | * @skb: the IPv6 packet to check | |
ab49886e | 867 | * @is_unsnoopable: stores whether the destination is snoopable |
1d8ab8d3 LL |
868 | * |
869 | * Checks whether the given IPv6 packet has the potential to be forwarded with a | |
870 | * mode more optimal than classic flooding. | |
871 | * | |
62fe710f | 872 | * Return: If so then 0. Otherwise -EINVAL is or -ENOMEM if we are out of memory |
1d8ab8d3 LL |
873 | */ |
874 | static int batadv_mcast_forw_mode_check_ipv6(struct batadv_priv *bat_priv, | |
ab49886e LL |
875 | struct sk_buff *skb, |
876 | bool *is_unsnoopable) | |
1d8ab8d3 LL |
877 | { |
878 | struct ipv6hdr *ip6hdr; | |
879 | ||
880 | /* We might fail due to out-of-memory -> drop it */ | |
881 | if (!pskb_may_pull(skb, sizeof(struct ethhdr) + sizeof(*ip6hdr))) | |
882 | return -ENOMEM; | |
883 | ||
bd2a979e LL |
884 | if (batadv_mcast_is_report_ipv6(skb)) |
885 | return -EINVAL; | |
886 | ||
1d8ab8d3 LL |
887 | ip6hdr = ipv6_hdr(skb); |
888 | ||
889 | /* TODO: Implement Multicast Router Discovery (RFC4286), | |
890 | * then allow scope > link local, too | |
891 | */ | |
892 | if (IPV6_ADDR_MC_SCOPE(&ip6hdr->daddr) != IPV6_ADDR_SCOPE_LINKLOCAL) | |
893 | return -EINVAL; | |
894 | ||
895 | /* link-local-all-nodes multicast listeners behind a bridge are | |
896 | * not snoopable (see RFC4541, section 3, paragraph 3) | |
897 | */ | |
898 | if (ipv6_addr_is_ll_all_nodes(&ip6hdr->daddr)) | |
ab49886e | 899 | *is_unsnoopable = true; |
1d8ab8d3 LL |
900 | |
901 | return 0; | |
902 | } | |
903 | ||
904 | /** | |
7e9a8c2c | 905 | * batadv_mcast_forw_mode_check() - check for optimized forwarding potential |
1d8ab8d3 LL |
906 | * @bat_priv: the bat priv with all the soft interface information |
907 | * @skb: the multicast frame to check | |
ab49886e | 908 | * @is_unsnoopable: stores whether the destination is snoopable |
1d8ab8d3 LL |
909 | * |
910 | * Checks whether the given multicast ethernet frame has the potential to be | |
911 | * forwarded with a mode more optimal than classic flooding. | |
912 | * | |
62fe710f | 913 | * Return: If so then 0. Otherwise -EINVAL is or -ENOMEM if we are out of memory |
1d8ab8d3 LL |
914 | */ |
915 | static int batadv_mcast_forw_mode_check(struct batadv_priv *bat_priv, | |
ab49886e LL |
916 | struct sk_buff *skb, |
917 | bool *is_unsnoopable) | |
1d8ab8d3 LL |
918 | { |
919 | struct ethhdr *ethhdr = eth_hdr(skb); | |
920 | ||
921 | if (!atomic_read(&bat_priv->multicast_mode)) | |
922 | return -EINVAL; | |
923 | ||
1d8ab8d3 | 924 | switch (ntohs(ethhdr->h_proto)) { |
ab49886e LL |
925 | case ETH_P_IP: |
926 | return batadv_mcast_forw_mode_check_ipv4(bat_priv, skb, | |
927 | is_unsnoopable); | |
1d8ab8d3 | 928 | case ETH_P_IPV6: |
c1bacea0 SE |
929 | if (!IS_ENABLED(CONFIG_IPV6)) |
930 | return -EINVAL; | |
931 | ||
ab49886e LL |
932 | return batadv_mcast_forw_mode_check_ipv6(bat_priv, skb, |
933 | is_unsnoopable); | |
1d8ab8d3 LL |
934 | default: |
935 | return -EINVAL; | |
936 | } | |
937 | } | |
938 | ||
4c8755d6 | 939 | /** |
7e9a8c2c | 940 | * batadv_mcast_forw_want_all_ip_count() - count nodes with unspecific mcast |
6d030de8 | 941 | * interest |
4c8755d6 LL |
942 | * @bat_priv: the bat priv with all the soft interface information |
943 | * @ethhdr: ethernet header of a packet | |
944 | * | |
62fe710f | 945 | * Return: the number of nodes which want all IPv4 multicast traffic if the |
4c8755d6 LL |
946 | * given ethhdr is from an IPv4 packet or the number of nodes which want all |
947 | * IPv6 traffic if it matches an IPv6 packet. | |
948 | */ | |
949 | static int batadv_mcast_forw_want_all_ip_count(struct batadv_priv *bat_priv, | |
950 | struct ethhdr *ethhdr) | |
951 | { | |
952 | switch (ntohs(ethhdr->h_proto)) { | |
953 | case ETH_P_IP: | |
954 | return atomic_read(&bat_priv->mcast.num_want_all_ipv4); | |
955 | case ETH_P_IPV6: | |
956 | return atomic_read(&bat_priv->mcast.num_want_all_ipv6); | |
957 | default: | |
958 | /* we shouldn't be here... */ | |
959 | return 0; | |
960 | } | |
961 | } | |
962 | ||
1d8ab8d3 | 963 | /** |
7e9a8c2c | 964 | * batadv_mcast_forw_tt_node_get() - get a multicast tt node |
1d8ab8d3 LL |
965 | * @bat_priv: the bat priv with all the soft interface information |
966 | * @ethhdr: the ether header containing the multicast destination | |
967 | * | |
62fe710f | 968 | * Return: an orig_node matching the multicast address provided by ethhdr |
1d8ab8d3 LL |
969 | * via a translation table lookup. This increases the returned nodes refcount. |
970 | */ | |
971 | static struct batadv_orig_node * | |
972 | batadv_mcast_forw_tt_node_get(struct batadv_priv *bat_priv, | |
973 | struct ethhdr *ethhdr) | |
974 | { | |
f8fb3419 LL |
975 | return batadv_transtable_search(bat_priv, NULL, ethhdr->h_dest, |
976 | BATADV_NO_FLAGS); | |
1d8ab8d3 LL |
977 | } |
978 | ||
4c8755d6 | 979 | /** |
7e9a8c2c | 980 | * batadv_mcast_forw_ipv4_node_get() - get a node with an ipv4 flag |
4c8755d6 LL |
981 | * @bat_priv: the bat priv with all the soft interface information |
982 | * | |
62fe710f | 983 | * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 flag set and |
4c8755d6 LL |
984 | * increases its refcount. |
985 | */ | |
986 | static struct batadv_orig_node * | |
987 | batadv_mcast_forw_ipv4_node_get(struct batadv_priv *bat_priv) | |
988 | { | |
989 | struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; | |
990 | ||
991 | rcu_read_lock(); | |
992 | hlist_for_each_entry_rcu(tmp_orig_node, | |
993 | &bat_priv->mcast.want_all_ipv4_list, | |
994 | mcast_want_all_ipv4_node) { | |
7c124391 | 995 | if (!kref_get_unless_zero(&tmp_orig_node->refcount)) |
4c8755d6 LL |
996 | continue; |
997 | ||
998 | orig_node = tmp_orig_node; | |
999 | break; | |
1000 | } | |
1001 | rcu_read_unlock(); | |
1002 | ||
1003 | return orig_node; | |
1004 | } | |
1005 | ||
1006 | /** | |
7e9a8c2c | 1007 | * batadv_mcast_forw_ipv6_node_get() - get a node with an ipv6 flag |
4c8755d6 LL |
1008 | * @bat_priv: the bat priv with all the soft interface information |
1009 | * | |
62fe710f | 1010 | * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV6 flag set |
4c8755d6 LL |
1011 | * and increases its refcount. |
1012 | */ | |
1013 | static struct batadv_orig_node * | |
1014 | batadv_mcast_forw_ipv6_node_get(struct batadv_priv *bat_priv) | |
1015 | { | |
1016 | struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; | |
1017 | ||
1018 | rcu_read_lock(); | |
1019 | hlist_for_each_entry_rcu(tmp_orig_node, | |
1020 | &bat_priv->mcast.want_all_ipv6_list, | |
1021 | mcast_want_all_ipv6_node) { | |
7c124391 | 1022 | if (!kref_get_unless_zero(&tmp_orig_node->refcount)) |
4c8755d6 LL |
1023 | continue; |
1024 | ||
1025 | orig_node = tmp_orig_node; | |
1026 | break; | |
1027 | } | |
1028 | rcu_read_unlock(); | |
1029 | ||
1030 | return orig_node; | |
1031 | } | |
1032 | ||
1033 | /** | |
7e9a8c2c | 1034 | * batadv_mcast_forw_ip_node_get() - get a node with an ipv4/ipv6 flag |
4c8755d6 LL |
1035 | * @bat_priv: the bat priv with all the soft interface information |
1036 | * @ethhdr: an ethernet header to determine the protocol family from | |
1037 | * | |
62fe710f | 1038 | * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 or |
4c8755d6 LL |
1039 | * BATADV_MCAST_WANT_ALL_IPV6 flag, depending on the provided ethhdr, set and |
1040 | * increases its refcount. | |
1041 | */ | |
1042 | static struct batadv_orig_node * | |
1043 | batadv_mcast_forw_ip_node_get(struct batadv_priv *bat_priv, | |
1044 | struct ethhdr *ethhdr) | |
1045 | { | |
1046 | switch (ntohs(ethhdr->h_proto)) { | |
1047 | case ETH_P_IP: | |
1048 | return batadv_mcast_forw_ipv4_node_get(bat_priv); | |
1049 | case ETH_P_IPV6: | |
1050 | return batadv_mcast_forw_ipv6_node_get(bat_priv); | |
1051 | default: | |
1052 | /* we shouldn't be here... */ | |
1053 | return NULL; | |
1054 | } | |
1055 | } | |
1056 | ||
ab49886e | 1057 | /** |
7e9a8c2c | 1058 | * batadv_mcast_forw_unsnoop_node_get() - get a node with an unsnoopable flag |
ab49886e LL |
1059 | * @bat_priv: the bat priv with all the soft interface information |
1060 | * | |
62fe710f | 1061 | * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag |
ab49886e LL |
1062 | * set and increases its refcount. |
1063 | */ | |
1064 | static struct batadv_orig_node * | |
1065 | batadv_mcast_forw_unsnoop_node_get(struct batadv_priv *bat_priv) | |
1066 | { | |
1067 | struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; | |
1068 | ||
1069 | rcu_read_lock(); | |
1070 | hlist_for_each_entry_rcu(tmp_orig_node, | |
1071 | &bat_priv->mcast.want_all_unsnoopables_list, | |
1072 | mcast_want_all_unsnoopables_node) { | |
7c124391 | 1073 | if (!kref_get_unless_zero(&tmp_orig_node->refcount)) |
ab49886e LL |
1074 | continue; |
1075 | ||
1076 | orig_node = tmp_orig_node; | |
1077 | break; | |
1078 | } | |
1079 | rcu_read_unlock(); | |
1080 | ||
1081 | return orig_node; | |
1082 | } | |
1083 | ||
1d8ab8d3 | 1084 | /** |
7e9a8c2c | 1085 | * batadv_mcast_forw_mode() - check on how to forward a multicast packet |
1d8ab8d3 LL |
1086 | * @bat_priv: the bat priv with all the soft interface information |
1087 | * @skb: The multicast packet to check | |
1088 | * @orig: an originator to be set to forward the skb to | |
1089 | * | |
62fe710f | 1090 | * Return: the forwarding mode as enum batadv_forw_mode and in case of |
1d8ab8d3 LL |
1091 | * BATADV_FORW_SINGLE set the orig to the single originator the skb |
1092 | * should be forwarded to. | |
1093 | */ | |
1094 | enum batadv_forw_mode | |
1095 | batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, | |
1096 | struct batadv_orig_node **orig) | |
1097 | { | |
4c8755d6 | 1098 | int ret, tt_count, ip_count, unsnoop_count, total_count; |
ab49886e | 1099 | bool is_unsnoopable = false; |
32e72744 | 1100 | unsigned int mcast_fanout; |
1d8ab8d3 | 1101 | struct ethhdr *ethhdr; |
1d8ab8d3 | 1102 | |
ab49886e | 1103 | ret = batadv_mcast_forw_mode_check(bat_priv, skb, &is_unsnoopable); |
1d8ab8d3 LL |
1104 | if (ret == -ENOMEM) |
1105 | return BATADV_FORW_NONE; | |
1106 | else if (ret < 0) | |
1107 | return BATADV_FORW_ALL; | |
1108 | ||
1109 | ethhdr = eth_hdr(skb); | |
1110 | ||
1111 | tt_count = batadv_tt_global_hash_count(bat_priv, ethhdr->h_dest, | |
1112 | BATADV_NO_FLAGS); | |
4c8755d6 | 1113 | ip_count = batadv_mcast_forw_want_all_ip_count(bat_priv, ethhdr); |
ab49886e LL |
1114 | unsnoop_count = !is_unsnoopable ? 0 : |
1115 | atomic_read(&bat_priv->mcast.num_want_all_unsnoopables); | |
1116 | ||
4c8755d6 | 1117 | total_count = tt_count + ip_count + unsnoop_count; |
1d8ab8d3 | 1118 | |
ab49886e | 1119 | switch (total_count) { |
1d8ab8d3 | 1120 | case 1: |
ab49886e LL |
1121 | if (tt_count) |
1122 | *orig = batadv_mcast_forw_tt_node_get(bat_priv, ethhdr); | |
4c8755d6 LL |
1123 | else if (ip_count) |
1124 | *orig = batadv_mcast_forw_ip_node_get(bat_priv, ethhdr); | |
ab49886e LL |
1125 | else if (unsnoop_count) |
1126 | *orig = batadv_mcast_forw_unsnoop_node_get(bat_priv); | |
1127 | ||
1d8ab8d3 LL |
1128 | if (*orig) |
1129 | return BATADV_FORW_SINGLE; | |
1130 | ||
1131 | /* fall through */ | |
1132 | case 0: | |
1133 | return BATADV_FORW_NONE; | |
1134 | default: | |
32e72744 LL |
1135 | mcast_fanout = atomic_read(&bat_priv->multicast_fanout); |
1136 | ||
1137 | if (!unsnoop_count && total_count <= mcast_fanout) | |
1138 | return BATADV_FORW_SOME; | |
1139 | } | |
1140 | ||
1141 | return BATADV_FORW_ALL; | |
1142 | } | |
1143 | ||
1144 | /** | |
1145 | * batadv_mcast_forw_tt() - forwards a packet to multicast listeners | |
1146 | * @bat_priv: the bat priv with all the soft interface information | |
1147 | * @skb: the multicast packet to transmit | |
1148 | * @vid: the vlan identifier | |
1149 | * | |
1150 | * Sends copies of a frame with multicast destination to any multicast | |
1151 | * listener registered in the translation table. A transmission is performed | |
1152 | * via a batman-adv unicast packet for each such destination node. | |
1153 | * | |
1154 | * Return: NET_XMIT_DROP on memory allocation failure, NET_XMIT_SUCCESS | |
1155 | * otherwise. | |
1156 | */ | |
1157 | static int | |
1158 | batadv_mcast_forw_tt(struct batadv_priv *bat_priv, struct sk_buff *skb, | |
1159 | unsigned short vid) | |
1160 | { | |
1161 | int ret = NET_XMIT_SUCCESS; | |
1162 | struct sk_buff *newskb; | |
1163 | ||
1164 | struct batadv_tt_orig_list_entry *orig_entry; | |
1165 | ||
1166 | struct batadv_tt_global_entry *tt_global; | |
1167 | const u8 *addr = eth_hdr(skb)->h_dest; | |
1168 | ||
1169 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
1170 | if (!tt_global) | |
1171 | goto out; | |
1172 | ||
1173 | rcu_read_lock(); | |
1174 | hlist_for_each_entry_rcu(orig_entry, &tt_global->orig_list, list) { | |
1175 | newskb = skb_copy(skb, GFP_ATOMIC); | |
1176 | if (!newskb) { | |
1177 | ret = NET_XMIT_DROP; | |
1178 | break; | |
1179 | } | |
1180 | ||
1181 | batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0, | |
1182 | orig_entry->orig_node, vid); | |
1183 | } | |
1184 | rcu_read_unlock(); | |
1185 | ||
1186 | batadv_tt_global_entry_put(tt_global); | |
1187 | ||
1188 | out: | |
1189 | return ret; | |
1190 | } | |
1191 | ||
1192 | /** | |
1193 | * batadv_mcast_forw_want_all_ipv4() - forward to nodes with want-all-ipv4 | |
1194 | * @bat_priv: the bat priv with all the soft interface information | |
1195 | * @skb: the multicast packet to transmit | |
1196 | * @vid: the vlan identifier | |
1197 | * | |
1198 | * Sends copies of a frame with multicast destination to any node with a | |
1199 | * BATADV_MCAST_WANT_ALL_IPV4 flag set. A transmission is performed via a | |
1200 | * batman-adv unicast packet for each such destination node. | |
1201 | * | |
1202 | * Return: NET_XMIT_DROP on memory allocation failure, NET_XMIT_SUCCESS | |
1203 | * otherwise. | |
1204 | */ | |
1205 | static int | |
1206 | batadv_mcast_forw_want_all_ipv4(struct batadv_priv *bat_priv, | |
1207 | struct sk_buff *skb, unsigned short vid) | |
1208 | { | |
1209 | struct batadv_orig_node *orig_node; | |
1210 | int ret = NET_XMIT_SUCCESS; | |
1211 | struct sk_buff *newskb; | |
1212 | ||
1213 | rcu_read_lock(); | |
1214 | hlist_for_each_entry_rcu(orig_node, | |
1215 | &bat_priv->mcast.want_all_ipv4_list, | |
1216 | mcast_want_all_ipv4_node) { | |
1217 | newskb = skb_copy(skb, GFP_ATOMIC); | |
1218 | if (!newskb) { | |
1219 | ret = NET_XMIT_DROP; | |
1220 | break; | |
1221 | } | |
1222 | ||
1223 | batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0, | |
1224 | orig_node, vid); | |
1225 | } | |
1226 | rcu_read_unlock(); | |
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | /** | |
1231 | * batadv_mcast_forw_want_all_ipv6() - forward to nodes with want-all-ipv6 | |
1232 | * @bat_priv: the bat priv with all the soft interface information | |
1233 | * @skb: The multicast packet to transmit | |
1234 | * @vid: the vlan identifier | |
1235 | * | |
1236 | * Sends copies of a frame with multicast destination to any node with a | |
1237 | * BATADV_MCAST_WANT_ALL_IPV6 flag set. A transmission is performed via a | |
1238 | * batman-adv unicast packet for each such destination node. | |
1239 | * | |
1240 | * Return: NET_XMIT_DROP on memory allocation failure, NET_XMIT_SUCCESS | |
1241 | * otherwise. | |
1242 | */ | |
1243 | static int | |
1244 | batadv_mcast_forw_want_all_ipv6(struct batadv_priv *bat_priv, | |
1245 | struct sk_buff *skb, unsigned short vid) | |
1246 | { | |
1247 | struct batadv_orig_node *orig_node; | |
1248 | int ret = NET_XMIT_SUCCESS; | |
1249 | struct sk_buff *newskb; | |
1250 | ||
1251 | rcu_read_lock(); | |
1252 | hlist_for_each_entry_rcu(orig_node, | |
1253 | &bat_priv->mcast.want_all_ipv6_list, | |
1254 | mcast_want_all_ipv6_node) { | |
1255 | newskb = skb_copy(skb, GFP_ATOMIC); | |
1256 | if (!newskb) { | |
1257 | ret = NET_XMIT_DROP; | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0, | |
1262 | orig_node, vid); | |
1d8ab8d3 | 1263 | } |
32e72744 LL |
1264 | rcu_read_unlock(); |
1265 | return ret; | |
1266 | } | |
1267 | ||
1268 | /** | |
1269 | * batadv_mcast_forw_want_all() - forward packet to nodes in a want-all list | |
1270 | * @bat_priv: the bat priv with all the soft interface information | |
1271 | * @skb: the multicast packet to transmit | |
1272 | * @vid: the vlan identifier | |
1273 | * | |
1274 | * Sends copies of a frame with multicast destination to any node with a | |
1275 | * BATADV_MCAST_WANT_ALL_IPV4 or BATADV_MCAST_WANT_ALL_IPV6 flag set. A | |
1276 | * transmission is performed via a batman-adv unicast packet for each such | |
1277 | * destination node. | |
1278 | * | |
1279 | * Return: NET_XMIT_DROP on memory allocation failure or if the protocol family | |
1280 | * is neither IPv4 nor IPv6. NET_XMIT_SUCCESS otherwise. | |
1281 | */ | |
1282 | static int | |
1283 | batadv_mcast_forw_want_all(struct batadv_priv *bat_priv, | |
1284 | struct sk_buff *skb, unsigned short vid) | |
1285 | { | |
1286 | switch (ntohs(eth_hdr(skb)->h_proto)) { | |
1287 | case ETH_P_IP: | |
1288 | return batadv_mcast_forw_want_all_ipv4(bat_priv, skb, vid); | |
1289 | case ETH_P_IPV6: | |
1290 | return batadv_mcast_forw_want_all_ipv6(bat_priv, skb, vid); | |
1291 | default: | |
1292 | /* we shouldn't be here... */ | |
1293 | return NET_XMIT_DROP; | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | /** | |
1298 | * batadv_mcast_forw_send() - send packet to any detected multicast recpient | |
1299 | * @bat_priv: the bat priv with all the soft interface information | |
1300 | * @skb: the multicast packet to transmit | |
1301 | * @vid: the vlan identifier | |
1302 | * | |
1303 | * Sends copies of a frame with multicast destination to any node that signaled | |
1304 | * interest in it, that is either via the translation table or the according | |
1305 | * want-all flags. A transmission is performed via a batman-adv unicast packet | |
1306 | * for each such destination node. | |
1307 | * | |
1308 | * The given skb is consumed/freed. | |
1309 | * | |
1310 | * Return: NET_XMIT_DROP on memory allocation failure or if the protocol family | |
1311 | * is neither IPv4 nor IPv6. NET_XMIT_SUCCESS otherwise. | |
1312 | */ | |
1313 | int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb, | |
1314 | unsigned short vid) | |
1315 | { | |
1316 | int ret; | |
1317 | ||
1318 | ret = batadv_mcast_forw_tt(bat_priv, skb, vid); | |
1319 | if (ret != NET_XMIT_SUCCESS) { | |
1320 | kfree_skb(skb); | |
1321 | return ret; | |
1322 | } | |
1323 | ||
1324 | ret = batadv_mcast_forw_want_all(bat_priv, skb, vid); | |
1325 | if (ret != NET_XMIT_SUCCESS) { | |
1326 | kfree_skb(skb); | |
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | consume_skb(skb); | |
1331 | return ret; | |
1d8ab8d3 LL |
1332 | } |
1333 | ||
ab49886e | 1334 | /** |
7e9a8c2c | 1335 | * batadv_mcast_want_unsnoop_update() - update unsnoop counter and list |
ab49886e LL |
1336 | * @bat_priv: the bat priv with all the soft interface information |
1337 | * @orig: the orig_node which multicast state might have changed of | |
1338 | * @mcast_flags: flags indicating the new multicast state | |
1339 | * | |
1340 | * If the BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag of this originator, | |
1341 | * orig, has toggled then this method updates counter and list accordingly. | |
8a4023c5 LL |
1342 | * |
1343 | * Caller needs to hold orig->mcast_handler_lock. | |
ab49886e LL |
1344 | */ |
1345 | static void batadv_mcast_want_unsnoop_update(struct batadv_priv *bat_priv, | |
1346 | struct batadv_orig_node *orig, | |
6b5e971a | 1347 | u8 mcast_flags) |
ab49886e | 1348 | { |
8a4023c5 LL |
1349 | struct hlist_node *node = &orig->mcast_want_all_unsnoopables_node; |
1350 | struct hlist_head *head = &bat_priv->mcast.want_all_unsnoopables_list; | |
1351 | ||
5274cd68 SE |
1352 | lockdep_assert_held(&orig->mcast_handler_lock); |
1353 | ||
ab49886e LL |
1354 | /* switched from flag unset to set */ |
1355 | if (mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES && | |
1356 | !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)) { | |
1357 | atomic_inc(&bat_priv->mcast.num_want_all_unsnoopables); | |
1358 | ||
1359 | spin_lock_bh(&bat_priv->mcast.want_lists_lock); | |
8a4023c5 LL |
1360 | /* flag checks above + mcast_handler_lock prevents this */ |
1361 | WARN_ON(!hlist_unhashed(node)); | |
1362 | ||
1363 | hlist_add_head_rcu(node, head); | |
ab49886e LL |
1364 | spin_unlock_bh(&bat_priv->mcast.want_lists_lock); |
1365 | /* switched from flag set to unset */ | |
1366 | } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) && | |
1367 | orig->mcast_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) { | |
1368 | atomic_dec(&bat_priv->mcast.num_want_all_unsnoopables); | |
1369 | ||
1370 | spin_lock_bh(&bat_priv->mcast.want_lists_lock); | |
8a4023c5 LL |
1371 | /* flag checks above + mcast_handler_lock prevents this */ |
1372 | WARN_ON(hlist_unhashed(node)); | |
1373 | ||
1374 | hlist_del_init_rcu(node); | |
ab49886e LL |
1375 | spin_unlock_bh(&bat_priv->mcast.want_lists_lock); |
1376 | } | |
1377 | } | |
1378 | ||
4c8755d6 | 1379 | /** |
7e9a8c2c | 1380 | * batadv_mcast_want_ipv4_update() - update want-all-ipv4 counter and list |
4c8755d6 LL |
1381 | * @bat_priv: the bat priv with all the soft interface information |
1382 | * @orig: the orig_node which multicast state might have changed of | |
1383 | * @mcast_flags: flags indicating the new multicast state | |
1384 | * | |
1385 | * If the BATADV_MCAST_WANT_ALL_IPV4 flag of this originator, orig, has | |
1386 | * toggled then this method updates counter and list accordingly. | |
8a4023c5 LL |
1387 | * |
1388 | * Caller needs to hold orig->mcast_handler_lock. | |
4c8755d6 LL |
1389 | */ |
1390 | static void batadv_mcast_want_ipv4_update(struct batadv_priv *bat_priv, | |
1391 | struct batadv_orig_node *orig, | |
6b5e971a | 1392 | u8 mcast_flags) |
4c8755d6 | 1393 | { |
8a4023c5 LL |
1394 | struct hlist_node *node = &orig->mcast_want_all_ipv4_node; |
1395 | struct hlist_head *head = &bat_priv->mcast.want_all_ipv4_list; | |
1396 | ||
5274cd68 SE |
1397 | lockdep_assert_held(&orig->mcast_handler_lock); |
1398 | ||
4c8755d6 LL |
1399 | /* switched from flag unset to set */ |
1400 | if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV4 && | |
1401 | !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4)) { | |
1402 | atomic_inc(&bat_priv->mcast.num_want_all_ipv4); | |
1403 | ||
1404 | spin_lock_bh(&bat_priv->mcast.want_lists_lock); | |
8a4023c5 LL |
1405 | /* flag checks above + mcast_handler_lock prevents this */ |
1406 | WARN_ON(!hlist_unhashed(node)); | |
1407 | ||
1408 | hlist_add_head_rcu(node, head); | |
4c8755d6 LL |
1409 | spin_unlock_bh(&bat_priv->mcast.want_lists_lock); |
1410 | /* switched from flag set to unset */ | |
1411 | } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) && | |
1412 | orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) { | |
1413 | atomic_dec(&bat_priv->mcast.num_want_all_ipv4); | |
1414 | ||
1415 | spin_lock_bh(&bat_priv->mcast.want_lists_lock); | |
8a4023c5 LL |
1416 | /* flag checks above + mcast_handler_lock prevents this */ |
1417 | WARN_ON(hlist_unhashed(node)); | |
1418 | ||
1419 | hlist_del_init_rcu(node); | |
4c8755d6 LL |
1420 | spin_unlock_bh(&bat_priv->mcast.want_lists_lock); |
1421 | } | |
1422 | } | |
1423 | ||
1424 | /** | |
7e9a8c2c | 1425 | * batadv_mcast_want_ipv6_update() - update want-all-ipv6 counter and list |
4c8755d6 LL |
1426 | * @bat_priv: the bat priv with all the soft interface information |
1427 | * @orig: the orig_node which multicast state might have changed of | |
1428 | * @mcast_flags: flags indicating the new multicast state | |
1429 | * | |
1430 | * If the BATADV_MCAST_WANT_ALL_IPV6 flag of this originator, orig, has | |
1431 | * toggled then this method updates counter and list accordingly. | |
8a4023c5 LL |
1432 | * |
1433 | * Caller needs to hold orig->mcast_handler_lock. | |
4c8755d6 LL |
1434 | */ |
1435 | static void batadv_mcast_want_ipv6_update(struct batadv_priv *bat_priv, | |
1436 | struct batadv_orig_node *orig, | |
6b5e971a | 1437 | u8 mcast_flags) |
4c8755d6 | 1438 | { |
8a4023c5 LL |
1439 | struct hlist_node *node = &orig->mcast_want_all_ipv6_node; |
1440 | struct hlist_head *head = &bat_priv->mcast.want_all_ipv6_list; | |
1441 | ||
5274cd68 SE |
1442 | lockdep_assert_held(&orig->mcast_handler_lock); |
1443 | ||
4c8755d6 LL |
1444 | /* switched from flag unset to set */ |
1445 | if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV6 && | |
1446 | !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6)) { | |
1447 | atomic_inc(&bat_priv->mcast.num_want_all_ipv6); | |
1448 | ||
1449 | spin_lock_bh(&bat_priv->mcast.want_lists_lock); | |
8a4023c5 LL |
1450 | /* flag checks above + mcast_handler_lock prevents this */ |
1451 | WARN_ON(!hlist_unhashed(node)); | |
1452 | ||
1453 | hlist_add_head_rcu(node, head); | |
4c8755d6 LL |
1454 | spin_unlock_bh(&bat_priv->mcast.want_lists_lock); |
1455 | /* switched from flag set to unset */ | |
1456 | } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) && | |
1457 | orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) { | |
1458 | atomic_dec(&bat_priv->mcast.num_want_all_ipv6); | |
1459 | ||
1460 | spin_lock_bh(&bat_priv->mcast.want_lists_lock); | |
8a4023c5 LL |
1461 | /* flag checks above + mcast_handler_lock prevents this */ |
1462 | WARN_ON(hlist_unhashed(node)); | |
1463 | ||
1464 | hlist_del_init_rcu(node); | |
4c8755d6 LL |
1465 | spin_unlock_bh(&bat_priv->mcast.want_lists_lock); |
1466 | } | |
1467 | } | |
1468 | ||
60432d75 | 1469 | /** |
7e9a8c2c | 1470 | * batadv_mcast_tvlv_ogm_handler() - process incoming multicast tvlv container |
60432d75 LL |
1471 | * @bat_priv: the bat priv with all the soft interface information |
1472 | * @orig: the orig_node of the ogm | |
1473 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
1474 | * @tvlv_value: tvlv buffer containing the multicast data | |
1475 | * @tvlv_value_len: tvlv buffer length | |
1476 | */ | |
bd2a979e LL |
1477 | static void batadv_mcast_tvlv_ogm_handler(struct batadv_priv *bat_priv, |
1478 | struct batadv_orig_node *orig, | |
1479 | u8 flags, | |
1480 | void *tvlv_value, | |
1481 | u16 tvlv_value_len) | |
60432d75 LL |
1482 | { |
1483 | bool orig_mcast_enabled = !(flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND); | |
6b5e971a | 1484 | u8 mcast_flags = BATADV_NO_FLAGS; |
60432d75 | 1485 | |
8a4023c5 | 1486 | if (orig_mcast_enabled && tvlv_value && |
825ffe1f | 1487 | tvlv_value_len >= sizeof(mcast_flags)) |
6b5e971a | 1488 | mcast_flags = *(u8 *)tvlv_value; |
8a4023c5 | 1489 | |
f26e4e98 LL |
1490 | if (!orig_mcast_enabled) { |
1491 | mcast_flags |= BATADV_MCAST_WANT_ALL_IPV4; | |
1492 | mcast_flags |= BATADV_MCAST_WANT_ALL_IPV6; | |
1493 | } | |
1494 | ||
8a4023c5 | 1495 | spin_lock_bh(&orig->mcast_handler_lock); |
60432d75 | 1496 | |
60432d75 | 1497 | if (orig_mcast_enabled && |
9c936e3f | 1498 | !test_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities)) { |
9c936e3f | 1499 | set_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities); |
60432d75 | 1500 | } else if (!orig_mcast_enabled && |
f26e4e98 | 1501 | test_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities)) { |
9c936e3f | 1502 | clear_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capabilities); |
60432d75 LL |
1503 | } |
1504 | ||
9c936e3f | 1505 | set_bit(BATADV_ORIG_CAPA_HAS_MCAST, &orig->capa_initialized); |
60432d75 | 1506 | |
ab49886e | 1507 | batadv_mcast_want_unsnoop_update(bat_priv, orig, mcast_flags); |
4c8755d6 LL |
1508 | batadv_mcast_want_ipv4_update(bat_priv, orig, mcast_flags); |
1509 | batadv_mcast_want_ipv6_update(bat_priv, orig, mcast_flags); | |
ab49886e | 1510 | |
60432d75 | 1511 | orig->mcast_flags = mcast_flags; |
8a4023c5 | 1512 | spin_unlock_bh(&orig->mcast_handler_lock); |
60432d75 LL |
1513 | } |
1514 | ||
1515 | /** | |
7e9a8c2c | 1516 | * batadv_mcast_init() - initialize the multicast optimizations structures |
60432d75 LL |
1517 | * @bat_priv: the bat priv with all the soft interface information |
1518 | */ | |
1519 | void batadv_mcast_init(struct batadv_priv *bat_priv) | |
1520 | { | |
bd2a979e LL |
1521 | batadv_tvlv_handler_register(bat_priv, batadv_mcast_tvlv_ogm_handler, |
1522 | NULL, BATADV_TVLV_MCAST, 2, | |
60432d75 | 1523 | BATADV_TVLV_HANDLER_OGM_CIFNOTFND); |
cbebd363 LL |
1524 | |
1525 | INIT_DELAYED_WORK(&bat_priv->mcast.work, batadv_mcast_mla_update); | |
1526 | batadv_mcast_start_timer(bat_priv); | |
60432d75 LL |
1527 | } |
1528 | ||
dc1cbd14 | 1529 | #ifdef CONFIG_BATMAN_ADV_DEBUGFS |
4e3e823b | 1530 | /** |
7e9a8c2c | 1531 | * batadv_mcast_flags_print_header() - print own mcast flags to debugfs table |
4e3e823b LL |
1532 | * @bat_priv: the bat priv with all the soft interface information |
1533 | * @seq: debugfs table seq_file struct | |
1534 | * | |
1535 | * Prints our own multicast flags including a more specific reason why | |
1536 | * they are set, that is prints the bridge and querier state too, to | |
1537 | * the debugfs table specified via @seq. | |
1538 | */ | |
1539 | static void batadv_mcast_flags_print_header(struct batadv_priv *bat_priv, | |
1540 | struct seq_file *seq) | |
1541 | { | |
6bc45440 | 1542 | struct batadv_mcast_mla_flags *mla_flags = &bat_priv->mcast.mla_flags; |
4e3e823b | 1543 | char querier4, querier6, shadowing4, shadowing6; |
6bc45440 LL |
1544 | bool bridged = mla_flags->bridged; |
1545 | u8 flags = mla_flags->tvlv_flags; | |
4e3e823b LL |
1546 | |
1547 | if (bridged) { | |
6bc45440 LL |
1548 | querier4 = mla_flags->querier_ipv4.exists ? '.' : '4'; |
1549 | querier6 = mla_flags->querier_ipv6.exists ? '.' : '6'; | |
1550 | shadowing4 = mla_flags->querier_ipv4.shadowing ? '4' : '.'; | |
1551 | shadowing6 = mla_flags->querier_ipv6.shadowing ? '6' : '.'; | |
4e3e823b LL |
1552 | } else { |
1553 | querier4 = '?'; | |
1554 | querier6 = '?'; | |
1555 | shadowing4 = '?'; | |
1556 | shadowing6 = '?'; | |
1557 | } | |
1558 | ||
1559 | seq_printf(seq, "Multicast flags (own flags: [%c%c%c])\n", | |
1560 | (flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.', | |
1561 | (flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.', | |
1562 | (flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.'); | |
1563 | seq_printf(seq, "* Bridged [U]\t\t\t\t%c\n", bridged ? 'U' : '.'); | |
1564 | seq_printf(seq, "* No IGMP/MLD Querier [4/6]:\t\t%c/%c\n", | |
1565 | querier4, querier6); | |
1566 | seq_printf(seq, "* Shadowing IGMP/MLD Querier [4/6]:\t%c/%c\n", | |
1567 | shadowing4, shadowing6); | |
1568 | seq_puts(seq, "-------------------------------------------\n"); | |
1569 | seq_printf(seq, " %-10s %s\n", "Originator", "Flags"); | |
1570 | } | |
1571 | ||
1572 | /** | |
7e9a8c2c | 1573 | * batadv_mcast_flags_seq_print_text() - print the mcast flags of other nodes |
4e3e823b LL |
1574 | * @seq: seq file to print on |
1575 | * @offset: not used | |
1576 | * | |
1577 | * This prints a table of (primary) originators and their according | |
1578 | * multicast flags, including (in the header) our own. | |
1579 | * | |
1580 | * Return: always 0 | |
1581 | */ | |
1582 | int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset) | |
1583 | { | |
1584 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1585 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
1586 | struct batadv_hard_iface *primary_if; | |
1587 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
1588 | struct batadv_orig_node *orig_node; | |
1589 | struct hlist_head *head; | |
1590 | u8 flags; | |
1591 | u32 i; | |
1592 | ||
1593 | primary_if = batadv_seq_print_text_primary_if_get(seq); | |
1594 | if (!primary_if) | |
1595 | return 0; | |
1596 | ||
1597 | batadv_mcast_flags_print_header(bat_priv, seq); | |
1598 | ||
1599 | for (i = 0; i < hash->size; i++) { | |
1600 | head = &hash->table[i]; | |
1601 | ||
1602 | rcu_read_lock(); | |
1603 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
1604 | if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST, | |
1605 | &orig_node->capa_initialized)) | |
1606 | continue; | |
1607 | ||
1608 | if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST, | |
1609 | &orig_node->capabilities)) { | |
1610 | seq_printf(seq, "%pM -\n", orig_node->orig); | |
1611 | continue; | |
1612 | } | |
1613 | ||
1614 | flags = orig_node->mcast_flags; | |
1615 | ||
1616 | seq_printf(seq, "%pM [%c%c%c]\n", orig_node->orig, | |
1617 | (flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) | |
1618 | ? 'U' : '.', | |
1619 | (flags & BATADV_MCAST_WANT_ALL_IPV4) | |
1620 | ? '4' : '.', | |
1621 | (flags & BATADV_MCAST_WANT_ALL_IPV6) | |
1622 | ? '6' : '.'); | |
1623 | } | |
1624 | rcu_read_unlock(); | |
1625 | } | |
1626 | ||
1627 | batadv_hardif_put(primary_if); | |
1628 | ||
1629 | return 0; | |
1630 | } | |
dc1cbd14 | 1631 | #endif |
4e3e823b | 1632 | |
53dd9a68 LL |
1633 | /** |
1634 | * batadv_mcast_mesh_info_put() - put multicast info into a netlink message | |
1635 | * @msg: buffer for the message | |
1636 | * @bat_priv: the bat priv with all the soft interface information | |
1637 | * | |
1638 | * Return: 0 or error code. | |
1639 | */ | |
1640 | int batadv_mcast_mesh_info_put(struct sk_buff *msg, | |
1641 | struct batadv_priv *bat_priv) | |
1642 | { | |
6bc45440 | 1643 | u32 flags = bat_priv->mcast.mla_flags.tvlv_flags; |
53dd9a68 LL |
1644 | u32 flags_priv = BATADV_NO_FLAGS; |
1645 | ||
6bc45440 | 1646 | if (bat_priv->mcast.mla_flags.bridged) { |
53dd9a68 LL |
1647 | flags_priv |= BATADV_MCAST_FLAGS_BRIDGED; |
1648 | ||
6bc45440 | 1649 | if (bat_priv->mcast.mla_flags.querier_ipv4.exists) |
53dd9a68 | 1650 | flags_priv |= BATADV_MCAST_FLAGS_QUERIER_IPV4_EXISTS; |
6bc45440 | 1651 | if (bat_priv->mcast.mla_flags.querier_ipv6.exists) |
53dd9a68 | 1652 | flags_priv |= BATADV_MCAST_FLAGS_QUERIER_IPV6_EXISTS; |
6bc45440 | 1653 | if (bat_priv->mcast.mla_flags.querier_ipv4.shadowing) |
53dd9a68 | 1654 | flags_priv |= BATADV_MCAST_FLAGS_QUERIER_IPV4_SHADOWING; |
6bc45440 | 1655 | if (bat_priv->mcast.mla_flags.querier_ipv6.shadowing) |
53dd9a68 LL |
1656 | flags_priv |= BATADV_MCAST_FLAGS_QUERIER_IPV6_SHADOWING; |
1657 | } | |
1658 | ||
1659 | if (nla_put_u32(msg, BATADV_ATTR_MCAST_FLAGS, flags) || | |
1660 | nla_put_u32(msg, BATADV_ATTR_MCAST_FLAGS_PRIV, flags_priv)) | |
1661 | return -EMSGSIZE; | |
1662 | ||
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * batadv_mcast_flags_dump_entry() - dump one entry of the multicast flags table | |
1668 | * to a netlink socket | |
1669 | * @msg: buffer for the message | |
1670 | * @portid: netlink port | |
d2d489b7 | 1671 | * @cb: Control block containing additional options |
53dd9a68 LL |
1672 | * @orig_node: originator to dump the multicast flags of |
1673 | * | |
1674 | * Return: 0 or error code. | |
1675 | */ | |
1676 | static int | |
d2d489b7 SE |
1677 | batadv_mcast_flags_dump_entry(struct sk_buff *msg, u32 portid, |
1678 | struct netlink_callback *cb, | |
53dd9a68 LL |
1679 | struct batadv_orig_node *orig_node) |
1680 | { | |
1681 | void *hdr; | |
1682 | ||
d2d489b7 SE |
1683 | hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq, |
1684 | &batadv_netlink_family, NLM_F_MULTI, | |
1685 | BATADV_CMD_GET_MCAST_FLAGS); | |
53dd9a68 LL |
1686 | if (!hdr) |
1687 | return -ENOBUFS; | |
1688 | ||
d2d489b7 SE |
1689 | genl_dump_check_consistent(cb, hdr); |
1690 | ||
53dd9a68 LL |
1691 | if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, |
1692 | orig_node->orig)) { | |
1693 | genlmsg_cancel(msg, hdr); | |
1694 | return -EMSGSIZE; | |
1695 | } | |
1696 | ||
1697 | if (test_bit(BATADV_ORIG_CAPA_HAS_MCAST, | |
1698 | &orig_node->capabilities)) { | |
1699 | if (nla_put_u32(msg, BATADV_ATTR_MCAST_FLAGS, | |
1700 | orig_node->mcast_flags)) { | |
1701 | genlmsg_cancel(msg, hdr); | |
1702 | return -EMSGSIZE; | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | genlmsg_end(msg, hdr); | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | /** | |
1711 | * batadv_mcast_flags_dump_bucket() - dump one bucket of the multicast flags | |
1712 | * table to a netlink socket | |
1713 | * @msg: buffer for the message | |
1714 | * @portid: netlink port | |
d2d489b7 SE |
1715 | * @cb: Control block containing additional options |
1716 | * @hash: hash to dump | |
1717 | * @bucket: bucket index to dump | |
53dd9a68 LL |
1718 | * @idx_skip: How many entries to skip |
1719 | * | |
1720 | * Return: 0 or error code. | |
1721 | */ | |
1722 | static int | |
d2d489b7 SE |
1723 | batadv_mcast_flags_dump_bucket(struct sk_buff *msg, u32 portid, |
1724 | struct netlink_callback *cb, | |
1725 | struct batadv_hashtable *hash, | |
1726 | unsigned int bucket, long *idx_skip) | |
53dd9a68 LL |
1727 | { |
1728 | struct batadv_orig_node *orig_node; | |
1729 | long idx = 0; | |
1730 | ||
d2d489b7 SE |
1731 | spin_lock_bh(&hash->list_locks[bucket]); |
1732 | cb->seq = atomic_read(&hash->generation) << 1 | 1; | |
1733 | ||
1734 | hlist_for_each_entry(orig_node, &hash->table[bucket], hash_entry) { | |
53dd9a68 LL |
1735 | if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST, |
1736 | &orig_node->capa_initialized)) | |
1737 | continue; | |
1738 | ||
1739 | if (idx < *idx_skip) | |
1740 | goto skip; | |
1741 | ||
d2d489b7 SE |
1742 | if (batadv_mcast_flags_dump_entry(msg, portid, cb, orig_node)) { |
1743 | spin_unlock_bh(&hash->list_locks[bucket]); | |
53dd9a68 LL |
1744 | *idx_skip = idx; |
1745 | ||
1746 | return -EMSGSIZE; | |
1747 | } | |
1748 | ||
1749 | skip: | |
1750 | idx++; | |
1751 | } | |
d2d489b7 | 1752 | spin_unlock_bh(&hash->list_locks[bucket]); |
53dd9a68 LL |
1753 | |
1754 | return 0; | |
1755 | } | |
1756 | ||
1757 | /** | |
1758 | * __batadv_mcast_flags_dump() - dump multicast flags table to a netlink socket | |
1759 | * @msg: buffer for the message | |
1760 | * @portid: netlink port | |
d2d489b7 | 1761 | * @cb: Control block containing additional options |
53dd9a68 LL |
1762 | * @bat_priv: the bat priv with all the soft interface information |
1763 | * @bucket: current bucket to dump | |
1764 | * @idx: index in current bucket to the next entry to dump | |
1765 | * | |
1766 | * Return: 0 or error code. | |
1767 | */ | |
1768 | static int | |
d2d489b7 SE |
1769 | __batadv_mcast_flags_dump(struct sk_buff *msg, u32 portid, |
1770 | struct netlink_callback *cb, | |
53dd9a68 LL |
1771 | struct batadv_priv *bat_priv, long *bucket, long *idx) |
1772 | { | |
1773 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
1774 | long bucket_tmp = *bucket; | |
53dd9a68 LL |
1775 | long idx_tmp = *idx; |
1776 | ||
1777 | while (bucket_tmp < hash->size) { | |
d2d489b7 SE |
1778 | if (batadv_mcast_flags_dump_bucket(msg, portid, cb, hash, |
1779 | *bucket, &idx_tmp)) | |
53dd9a68 LL |
1780 | break; |
1781 | ||
1782 | bucket_tmp++; | |
1783 | idx_tmp = 0; | |
1784 | } | |
1785 | ||
1786 | *bucket = bucket_tmp; | |
1787 | *idx = idx_tmp; | |
1788 | ||
1789 | return msg->len; | |
1790 | } | |
1791 | ||
1792 | /** | |
1793 | * batadv_mcast_netlink_get_primary() - get primary interface from netlink | |
1794 | * callback | |
1795 | * @cb: netlink callback structure | |
1796 | * @primary_if: the primary interface pointer to return the result in | |
1797 | * | |
1798 | * Return: 0 or error code. | |
1799 | */ | |
1800 | static int | |
1801 | batadv_mcast_netlink_get_primary(struct netlink_callback *cb, | |
1802 | struct batadv_hard_iface **primary_if) | |
1803 | { | |
1804 | struct batadv_hard_iface *hard_iface = NULL; | |
1805 | struct net *net = sock_net(cb->skb->sk); | |
1806 | struct net_device *soft_iface; | |
1807 | struct batadv_priv *bat_priv; | |
1808 | int ifindex; | |
1809 | int ret = 0; | |
1810 | ||
1811 | ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); | |
1812 | if (!ifindex) | |
1813 | return -EINVAL; | |
1814 | ||
1815 | soft_iface = dev_get_by_index(net, ifindex); | |
1816 | if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { | |
1817 | ret = -ENODEV; | |
1818 | goto out; | |
1819 | } | |
1820 | ||
1821 | bat_priv = netdev_priv(soft_iface); | |
1822 | ||
1823 | hard_iface = batadv_primary_if_get_selected(bat_priv); | |
1824 | if (!hard_iface || hard_iface->if_status != BATADV_IF_ACTIVE) { | |
1825 | ret = -ENOENT; | |
1826 | goto out; | |
1827 | } | |
1828 | ||
1829 | out: | |
1830 | if (soft_iface) | |
1831 | dev_put(soft_iface); | |
1832 | ||
1833 | if (!ret && primary_if) | |
1834 | *primary_if = hard_iface; | |
65cc02a8 | 1835 | else if (hard_iface) |
53dd9a68 LL |
1836 | batadv_hardif_put(hard_iface); |
1837 | ||
1838 | return ret; | |
1839 | } | |
1840 | ||
1841 | /** | |
1842 | * batadv_mcast_flags_dump() - dump multicast flags table to a netlink socket | |
1843 | * @msg: buffer for the message | |
1844 | * @cb: callback structure containing arguments | |
1845 | * | |
1846 | * Return: message length. | |
1847 | */ | |
1848 | int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb) | |
1849 | { | |
1850 | struct batadv_hard_iface *primary_if = NULL; | |
1851 | int portid = NETLINK_CB(cb->skb).portid; | |
1852 | struct batadv_priv *bat_priv; | |
1853 | long *bucket = &cb->args[0]; | |
1854 | long *idx = &cb->args[1]; | |
1855 | int ret; | |
1856 | ||
1857 | ret = batadv_mcast_netlink_get_primary(cb, &primary_if); | |
1858 | if (ret) | |
1859 | return ret; | |
1860 | ||
1861 | bat_priv = netdev_priv(primary_if->soft_iface); | |
d2d489b7 | 1862 | ret = __batadv_mcast_flags_dump(msg, portid, cb, bat_priv, bucket, idx); |
53dd9a68 LL |
1863 | |
1864 | batadv_hardif_put(primary_if); | |
1865 | return ret; | |
1866 | } | |
1867 | ||
c5caf4ef | 1868 | /** |
7e9a8c2c | 1869 | * batadv_mcast_free() - free the multicast optimizations structures |
c5caf4ef LL |
1870 | * @bat_priv: the bat priv with all the soft interface information |
1871 | */ | |
1872 | void batadv_mcast_free(struct batadv_priv *bat_priv) | |
1873 | { | |
cbebd363 LL |
1874 | cancel_delayed_work_sync(&bat_priv->mcast.work); |
1875 | ||
bd2a979e LL |
1876 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_MCAST, 2); |
1877 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST, 2); | |
60432d75 | 1878 | |
cbebd363 | 1879 | /* safely calling outside of worker, as worker was canceled above */ |
c5caf4ef LL |
1880 | batadv_mcast_mla_tt_retract(bat_priv, NULL); |
1881 | } | |
60432d75 LL |
1882 | |
1883 | /** | |
7e9a8c2c | 1884 | * batadv_mcast_purge_orig() - reset originator global mcast state modifications |
60432d75 LL |
1885 | * @orig: the originator which is going to get purged |
1886 | */ | |
1887 | void batadv_mcast_purge_orig(struct batadv_orig_node *orig) | |
1888 | { | |
1889 | struct batadv_priv *bat_priv = orig->bat_priv; | |
1890 | ||
8a4023c5 LL |
1891 | spin_lock_bh(&orig->mcast_handler_lock); |
1892 | ||
ab49886e | 1893 | batadv_mcast_want_unsnoop_update(bat_priv, orig, BATADV_NO_FLAGS); |
4c8755d6 LL |
1894 | batadv_mcast_want_ipv4_update(bat_priv, orig, BATADV_NO_FLAGS); |
1895 | batadv_mcast_want_ipv6_update(bat_priv, orig, BATADV_NO_FLAGS); | |
8a4023c5 LL |
1896 | |
1897 | spin_unlock_bh(&orig->mcast_handler_lock); | |
60432d75 | 1898 | } |