Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Multicast support for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1ab1457c | 8 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | /* Changes: | |
17 | * | |
18 | * yoshfuji : fix format of router-alert option | |
19 | * YOSHIFUJI Hideaki @USAGI: | |
20 | * Fixed source address for MLD message based on | |
21 | * <draft-ietf-magma-mld-source-05.txt>. | |
22 | * YOSHIFUJI Hideaki @USAGI: | |
23 | * - Ignore Queries for invalid addresses. | |
24 | * - MLD for link-local addresses. | |
25 | * David L Stevens <dlstevens@us.ibm.com>: | |
26 | * - MLDv2 support | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/errno.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/times.h> | |
37 | #include <linux/net.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/in6.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/if_arp.h> | |
42 | #include <linux/route.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9d4a0314 | 47 | #include <linux/pkt_sched.h> |
6e7cb837 | 48 | #include <net/mld.h> |
1da177e4 LT |
49 | |
50 | #include <linux/netfilter.h> | |
51 | #include <linux/netfilter_ipv6.h> | |
52 | ||
457c4cbc | 53 | #include <net/net_namespace.h> |
1da177e4 LT |
54 | #include <net/sock.h> |
55 | #include <net/snmp.h> | |
56 | ||
57 | #include <net/ipv6.h> | |
58 | #include <net/protocol.h> | |
59 | #include <net/if_inet6.h> | |
60 | #include <net/ndisc.h> | |
61 | #include <net/addrconf.h> | |
62 | #include <net/ip6_route.h> | |
1ed8516f | 63 | #include <net/inet_common.h> |
1da177e4 LT |
64 | |
65 | #include <net/ip6_checksum.h> | |
66 | ||
6e7cb837 YH |
67 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
68 | static void *__mld2_query_bugs[] __attribute__((__unused__)) = { | |
69 | BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
70 | BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4), | |
71 | BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4) | |
1da177e4 LT |
72 | }; |
73 | ||
74 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
75 | ||
1da177e4 LT |
76 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
77 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
78 | static void igmp6_timer_handler(unsigned long data); | |
79 | ||
80 | static void mld_gq_timer_expire(unsigned long data); | |
81 | static void mld_ifc_timer_expire(unsigned long data); | |
82 | static void mld_ifc_event(struct inet6_dev *idev); | |
83 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
b71d1d42 | 84 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr); |
1da177e4 | 85 | static void mld_clear_delrec(struct inet6_dev *idev); |
6c567b78 | 86 | static bool mld_in_v1_mode(const struct inet6_dev *idev); |
1da177e4 LT |
87 | static int sf_setstate(struct ifmcaddr6 *pmc); |
88 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
89 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
b71d1d42 ED |
90 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
91 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 | 92 | int delta); |
b71d1d42 ED |
93 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
94 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
95 | int delta); |
96 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
97 | struct inet6_dev *idev); | |
98 | ||
1da177e4 | 99 | #define MLD_QRV_DEFAULT 2 |
89225d1c DB |
100 | /* RFC3810, 9.2. Query Interval */ |
101 | #define MLD_QI_DEFAULT (125 * HZ) | |
102 | /* RFC3810, 9.3. Query Response Interval */ | |
103 | #define MLD_QRI_DEFAULT (10 * HZ) | |
1da177e4 | 104 | |
9fd07841 DB |
105 | /* RFC3810, 8.1 Query Version Distinctions */ |
106 | #define MLD_V1_QUERY_LEN 24 | |
107 | #define MLD_V2_QUERY_LEN_MIN 28 | |
108 | ||
6f4353d8 | 109 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 110 | |
ab32ea5d | 111 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
2f711939 | 112 | int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT; |
1da177e4 LT |
113 | |
114 | /* | |
115 | * socket join on multicast group | |
116 | */ | |
117 | ||
456b61bc ED |
118 | #define for_each_pmc_rcu(np, pmc) \ |
119 | for (pmc = rcu_dereference(np->ipv6_mc_list); \ | |
120 | pmc != NULL; \ | |
121 | pmc = rcu_dereference(pmc->next)) | |
122 | ||
fc4eba58 HFS |
123 | static int unsolicited_report_interval(struct inet6_dev *idev) |
124 | { | |
125 | int iv; | |
126 | ||
6c567b78 | 127 | if (mld_in_v1_mode(idev)) |
fc4eba58 HFS |
128 | iv = idev->cnf.mldv1_unsolicited_report_interval; |
129 | else | |
130 | iv = idev->cnf.mldv2_unsolicited_report_interval; | |
131 | ||
132 | return iv > 0 ? iv : 1; | |
133 | } | |
134 | ||
9acd9f3a | 135 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
136 | { |
137 | struct net_device *dev = NULL; | |
138 | struct ipv6_mc_socklist *mc_lst; | |
139 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 140 | struct net *net = sock_net(sk); |
1da177e4 LT |
141 | int err; |
142 | ||
143 | if (!ipv6_addr_is_multicast(addr)) | |
144 | return -EINVAL; | |
145 | ||
456b61bc ED |
146 | rcu_read_lock(); |
147 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
148 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
149 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 150 | rcu_read_unlock(); |
c9e3e8b6 DS |
151 | return -EADDRINUSE; |
152 | } | |
153 | } | |
456b61bc | 154 | rcu_read_unlock(); |
c9e3e8b6 | 155 | |
1da177e4 LT |
156 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
157 | ||
158 | if (mc_lst == NULL) | |
159 | return -ENOMEM; | |
160 | ||
161 | mc_lst->next = NULL; | |
4e3fd7a0 | 162 | mc_lst->addr = *addr; |
1da177e4 | 163 | |
a9ed4a29 | 164 | rtnl_lock(); |
1da177e4 LT |
165 | if (ifindex == 0) { |
166 | struct rt6_info *rt; | |
b8ad0cbc | 167 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 | 168 | if (rt) { |
d1918542 | 169 | dev = rt->dst.dev; |
94e187c0 | 170 | ip6_rt_put(rt); |
1da177e4 LT |
171 | } |
172 | } else | |
414b6c94 | 173 | dev = __dev_get_by_index(net, ifindex); |
1da177e4 LT |
174 | |
175 | if (dev == NULL) { | |
a9ed4a29 | 176 | rtnl_unlock(); |
1da177e4 LT |
177 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
178 | return -ENODEV; | |
179 | } | |
180 | ||
181 | mc_lst->ifindex = dev->ifindex; | |
182 | mc_lst->sfmode = MCAST_EXCLUDE; | |
196433c5 | 183 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
184 | mc_lst->sflist = NULL; |
185 | ||
186 | /* | |
187 | * now add/increase the group membership on the device | |
188 | */ | |
189 | ||
190 | err = ipv6_dev_mc_inc(dev, addr); | |
191 | ||
192 | if (err) { | |
a9ed4a29 | 193 | rtnl_unlock(); |
1da177e4 | 194 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
1da177e4 LT |
195 | return err; |
196 | } | |
197 | ||
1da177e4 | 198 | mc_lst->next = np->ipv6_mc_list; |
456b61bc | 199 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
1da177e4 | 200 | |
a9ed4a29 | 201 | rtnl_unlock(); |
1da177e4 LT |
202 | |
203 | return 0; | |
204 | } | |
205 | ||
206 | /* | |
207 | * socket leave on multicast group | |
208 | */ | |
9acd9f3a | 209 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
210 | { |
211 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
212 | struct ipv6_mc_socklist *mc_lst; |
213 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 214 | struct net *net = sock_net(sk); |
1da177e4 | 215 | |
a858d64b LW |
216 | if (!ipv6_addr_is_multicast(addr)) |
217 | return -EINVAL; | |
218 | ||
a9ed4a29 | 219 | rtnl_lock(); |
456b61bc | 220 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 221 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 222 | lnk = &mc_lst->next) { |
1da177e4 LT |
223 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
224 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
225 | struct net_device *dev; | |
226 | ||
227 | *lnk = mc_lst->next; | |
1da177e4 | 228 | |
414b6c94 | 229 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
b8ad0cbc | 230 | if (dev != NULL) { |
96b52e61 | 231 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 232 | |
acd6e00b | 233 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 234 | if (idev) |
1da177e4 | 235 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
236 | } else |
237 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 SD |
238 | rtnl_unlock(); |
239 | ||
456b61bc | 240 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 241 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
242 | return 0; |
243 | } | |
244 | } | |
a9ed4a29 | 245 | rtnl_unlock(); |
1da177e4 | 246 | |
9951f036 | 247 | return -EADDRNOTAVAIL; |
1da177e4 LT |
248 | } |
249 | ||
96b52e61 ED |
250 | /* called with rcu_read_lock() */ |
251 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 252 | const struct in6_addr *group, |
96b52e61 | 253 | int ifindex) |
1da177e4 LT |
254 | { |
255 | struct net_device *dev = NULL; | |
256 | struct inet6_dev *idev = NULL; | |
257 | ||
258 | if (ifindex == 0) { | |
96b52e61 | 259 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 260 | |
1da177e4 | 261 | if (rt) { |
d1918542 | 262 | dev = rt->dst.dev; |
94e187c0 | 263 | ip6_rt_put(rt); |
1da177e4 LT |
264 | } |
265 | } else | |
96b52e61 | 266 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
267 | |
268 | if (!dev) | |
96b52e61 ED |
269 | return NULL; |
270 | idev = __in6_dev_get(dev); | |
448eb71f | 271 | if (!idev) |
8a22c99a | 272 | return NULL; |
1da177e4 | 273 | read_lock_bh(&idev->lock); |
96b52e61 ED |
274 | if (idev->dead) { |
275 | read_unlock_bh(&idev->lock); | |
276 | return NULL; | |
277 | } | |
1da177e4 LT |
278 | return idev; |
279 | } | |
280 | ||
281 | void ipv6_sock_mc_close(struct sock *sk) | |
282 | { | |
283 | struct ipv6_pinfo *np = inet6_sk(sk); | |
284 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 285 | struct net *net = sock_net(sk); |
1da177e4 | 286 | |
0e1efe9d ED |
287 | if (!rcu_access_pointer(np->ipv6_mc_list)) |
288 | return; | |
289 | ||
a9ed4a29 | 290 | rtnl_lock(); |
b5350916 | 291 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
292 | struct net_device *dev; |
293 | ||
294 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 295 | |
414b6c94 | 296 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 297 | if (dev) { |
96b52e61 | 298 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 299 | |
acd6e00b | 300 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 301 | if (idev) |
1da177e4 | 302 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
303 | } else |
304 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 305 | |
456b61bc | 306 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 307 | kfree_rcu(mc_lst, rcu); |
456b61bc | 308 | |
1da177e4 | 309 | } |
a9ed4a29 | 310 | rtnl_unlock(); |
1da177e4 LT |
311 | } |
312 | ||
313 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
314 | struct group_source_req *pgsr) | |
315 | { | |
316 | struct in6_addr *source, *group; | |
317 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
318 | struct inet6_dev *idev; |
319 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
320 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 321 | struct net *net = sock_net(sk); |
1da177e4 | 322 | int i, j, rv; |
c9e3e8b6 | 323 | int leavegroup = 0; |
5ab4a6c8 | 324 | int pmclocked = 0; |
1da177e4 LT |
325 | int err; |
326 | ||
1da177e4 LT |
327 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
328 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
329 | ||
330 | if (!ipv6_addr_is_multicast(group)) | |
331 | return -EINVAL; | |
332 | ||
96b52e61 ED |
333 | rcu_read_lock(); |
334 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
335 | if (!idev) { | |
336 | rcu_read_unlock(); | |
1da177e4 | 337 | return -ENODEV; |
96b52e61 | 338 | } |
1da177e4 LT |
339 | |
340 | err = -EADDRNOTAVAIL; | |
341 | ||
456b61bc | 342 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
343 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
344 | continue; | |
345 | if (ipv6_addr_equal(&pmc->addr, group)) | |
346 | break; | |
347 | } | |
917f2f10 DS |
348 | if (!pmc) { /* must have a prior join */ |
349 | err = -EINVAL; | |
1da177e4 | 350 | goto done; |
917f2f10 | 351 | } |
1da177e4 LT |
352 | /* if a source filter was set, must be the same mode as before */ |
353 | if (pmc->sflist) { | |
917f2f10 DS |
354 | if (pmc->sfmode != omode) { |
355 | err = -EINVAL; | |
1da177e4 | 356 | goto done; |
917f2f10 | 357 | } |
1da177e4 LT |
358 | } else if (pmc->sfmode != omode) { |
359 | /* allow mode switches for empty-set filters */ | |
360 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
361 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
362 | pmc->sfmode = omode; | |
363 | } | |
364 | ||
96b52e61 | 365 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
366 | pmclocked = 1; |
367 | ||
1da177e4 LT |
368 | psl = pmc->sflist; |
369 | if (!add) { | |
370 | if (!psl) | |
917f2f10 | 371 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 372 | rv = !0; |
67ba4152 | 373 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 374 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
375 | if (rv == 0) |
376 | break; | |
377 | } | |
378 | if (rv) /* source not found */ | |
917f2f10 | 379 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 380 | |
c9e3e8b6 DS |
381 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
382 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
383 | leavegroup = 1; | |
384 | goto done; | |
385 | } | |
386 | ||
1da177e4 LT |
387 | /* update the interface filter */ |
388 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
389 | ||
67ba4152 | 390 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
391 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
392 | psl->sl_count--; | |
393 | err = 0; | |
394 | goto done; | |
395 | } | |
396 | /* else, add a new source to the filter */ | |
397 | ||
398 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
399 | err = -ENOBUFS; | |
400 | goto done; | |
401 | } | |
402 | if (!psl || psl->sl_count == psl->sl_max) { | |
403 | struct ip6_sf_socklist *newpsl; | |
404 | int count = IP6_SFBLOCK; | |
405 | ||
406 | if (psl) | |
407 | count += psl->sl_max; | |
8b3a7005 | 408 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
409 | if (!newpsl) { |
410 | err = -ENOBUFS; | |
411 | goto done; | |
412 | } | |
413 | newpsl->sl_max = count; | |
414 | newpsl->sl_count = count - IP6_SFBLOCK; | |
415 | if (psl) { | |
67ba4152 | 416 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
417 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
418 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
419 | } | |
420 | pmc->sflist = psl = newpsl; | |
421 | } | |
422 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 423 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 424 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
425 | if (rv == 0) /* There is an error in the address. */ |
426 | goto done; | |
1da177e4 | 427 | } |
67ba4152 | 428 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
429 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
430 | psl->sl_addr[i] = *source; | |
431 | psl->sl_count++; | |
432 | err = 0; | |
433 | /* update the interface list */ | |
434 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
435 | done: | |
5ab4a6c8 | 436 | if (pmclocked) |
96b52e61 | 437 | write_unlock(&pmc->sflock); |
1da177e4 | 438 | read_unlock_bh(&idev->lock); |
96b52e61 | 439 | rcu_read_unlock(); |
c9e3e8b6 DS |
440 | if (leavegroup) |
441 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
442 | return err; |
443 | } | |
444 | ||
445 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
446 | { | |
b71d1d42 | 447 | const struct in6_addr *group; |
1da177e4 | 448 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
449 | struct inet6_dev *idev; |
450 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
451 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 452 | struct net *net = sock_net(sk); |
9951f036 | 453 | int leavegroup = 0; |
1da177e4 LT |
454 | int i, err; |
455 | ||
456 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
457 | ||
458 | if (!ipv6_addr_is_multicast(group)) | |
459 | return -EINVAL; | |
460 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
461 | gsf->gf_fmode != MCAST_EXCLUDE) | |
462 | return -EINVAL; | |
463 | ||
96b52e61 ED |
464 | rcu_read_lock(); |
465 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 466 | |
96b52e61 ED |
467 | if (!idev) { |
468 | rcu_read_unlock(); | |
1da177e4 | 469 | return -ENODEV; |
96b52e61 | 470 | } |
1da177e4 | 471 | |
9c05989b | 472 | err = 0; |
5ab4a6c8 | 473 | |
9951f036 DS |
474 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
475 | leavegroup = 1; | |
476 | goto done; | |
477 | } | |
478 | ||
456b61bc | 479 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
480 | if (pmc->ifindex != gsf->gf_interface) |
481 | continue; | |
482 | if (ipv6_addr_equal(&pmc->addr, group)) | |
483 | break; | |
484 | } | |
917f2f10 DS |
485 | if (!pmc) { /* must have a prior join */ |
486 | err = -EINVAL; | |
1da177e4 | 487 | goto done; |
917f2f10 | 488 | } |
1da177e4 | 489 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
490 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
491 | GFP_ATOMIC); | |
1da177e4 LT |
492 | if (!newpsl) { |
493 | err = -ENOBUFS; | |
494 | goto done; | |
495 | } | |
496 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 497 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
498 | struct sockaddr_in6 *psin6; |
499 | ||
500 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
501 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
502 | } | |
503 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
504 | newpsl->sl_count, newpsl->sl_addr, 0); | |
505 | if (err) { | |
506 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
507 | goto done; | |
508 | } | |
8713dbf0 | 509 | } else { |
1da177e4 | 510 | newpsl = NULL; |
8713dbf0 YZ |
511 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
512 | } | |
5ab4a6c8 | 513 | |
96b52e61 | 514 | write_lock(&pmc->sflock); |
1da177e4 LT |
515 | psl = pmc->sflist; |
516 | if (psl) { | |
517 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
518 | psl->sl_count, psl->sl_addr, 0); | |
519 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
520 | } else | |
521 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
522 | pmc->sflist = newpsl; | |
523 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 524 | write_unlock(&pmc->sflock); |
917f2f10 | 525 | err = 0; |
1da177e4 LT |
526 | done: |
527 | read_unlock_bh(&idev->lock); | |
96b52e61 | 528 | rcu_read_unlock(); |
9951f036 DS |
529 | if (leavegroup) |
530 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
531 | return err; |
532 | } | |
533 | ||
534 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
535 | struct group_filter __user *optval, int __user *optlen) | |
536 | { | |
537 | int err, i, count, copycount; | |
b71d1d42 | 538 | const struct in6_addr *group; |
1da177e4 LT |
539 | struct ipv6_mc_socklist *pmc; |
540 | struct inet6_dev *idev; | |
1da177e4 LT |
541 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
542 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 543 | struct net *net = sock_net(sk); |
1da177e4 LT |
544 | |
545 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
546 | ||
547 | if (!ipv6_addr_is_multicast(group)) | |
548 | return -EINVAL; | |
549 | ||
96b52e61 ED |
550 | rcu_read_lock(); |
551 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 552 | |
96b52e61 ED |
553 | if (!idev) { |
554 | rcu_read_unlock(); | |
1da177e4 | 555 | return -ENODEV; |
96b52e61 | 556 | } |
1da177e4 LT |
557 | |
558 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
559 | /* changes to the ipv6_mc_list require the socket lock and |
560 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
561 | * so reading the list is safe. |
562 | */ | |
1da177e4 | 563 | |
456b61bc | 564 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
565 | if (pmc->ifindex != gsf->gf_interface) |
566 | continue; | |
567 | if (ipv6_addr_equal(group, &pmc->addr)) | |
568 | break; | |
569 | } | |
570 | if (!pmc) /* must have a prior join */ | |
571 | goto done; | |
572 | gsf->gf_fmode = pmc->sfmode; | |
573 | psl = pmc->sflist; | |
574 | count = psl ? psl->sl_count : 0; | |
575 | read_unlock_bh(&idev->lock); | |
96b52e61 | 576 | rcu_read_unlock(); |
1da177e4 LT |
577 | |
578 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
579 | gsf->gf_numsrc = count; | |
580 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
581 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
582 | return -EFAULT; | |
583 | } | |
f7ed925c WC |
584 | /* changes to psl require the socket lock, and a write lock |
585 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 586 | */ |
67ba4152 | 587 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
588 | struct sockaddr_in6 *psin6; |
589 | struct sockaddr_storage ss; | |
590 | ||
591 | psin6 = (struct sockaddr_in6 *)&ss; | |
592 | memset(&ss, 0, sizeof(ss)); | |
593 | psin6->sin6_family = AF_INET6; | |
594 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 595 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
596 | return -EFAULT; |
597 | } | |
598 | return 0; | |
599 | done: | |
600 | read_unlock_bh(&idev->lock); | |
96b52e61 | 601 | rcu_read_unlock(); |
1da177e4 LT |
602 | return err; |
603 | } | |
604 | ||
a50feda5 ED |
605 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
606 | const struct in6_addr *src_addr) | |
1da177e4 LT |
607 | { |
608 | struct ipv6_pinfo *np = inet6_sk(sk); | |
609 | struct ipv6_mc_socklist *mc; | |
610 | struct ip6_sf_socklist *psl; | |
a50feda5 | 611 | bool rv = true; |
1da177e4 | 612 | |
456b61bc ED |
613 | rcu_read_lock(); |
614 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
615 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
616 | break; | |
617 | } | |
618 | if (!mc) { | |
456b61bc | 619 | rcu_read_unlock(); |
a50feda5 | 620 | return true; |
1da177e4 | 621 | } |
5ab4a6c8 | 622 | read_lock(&mc->sflock); |
1da177e4 LT |
623 | psl = mc->sflist; |
624 | if (!psl) { | |
625 | rv = mc->sfmode == MCAST_EXCLUDE; | |
626 | } else { | |
627 | int i; | |
628 | ||
67ba4152 | 629 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
630 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
631 | break; | |
632 | } | |
633 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 634 | rv = false; |
1da177e4 | 635 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 636 | rv = false; |
1da177e4 | 637 | } |
5ab4a6c8 | 638 | read_unlock(&mc->sflock); |
456b61bc | 639 | rcu_read_unlock(); |
1da177e4 LT |
640 | |
641 | return rv; | |
642 | } | |
643 | ||
644 | static void ma_put(struct ifmcaddr6 *mc) | |
645 | { | |
646 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
647 | in6_dev_put(mc->idev); | |
648 | kfree(mc); | |
649 | } | |
650 | } | |
651 | ||
652 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
653 | { | |
654 | struct net_device *dev = mc->idev->dev; | |
655 | char buf[MAX_ADDR_LEN]; | |
656 | ||
ec16ef22 YH |
657 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
658 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
659 | return; | |
660 | ||
1da177e4 LT |
661 | spin_lock_bh(&mc->mca_lock); |
662 | if (!(mc->mca_flags&MAF_LOADED)) { | |
663 | mc->mca_flags |= MAF_LOADED; | |
664 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 665 | dev_mc_add(dev, buf); |
1da177e4 LT |
666 | } |
667 | spin_unlock_bh(&mc->mca_lock); | |
668 | ||
669 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
670 | return; | |
671 | ||
6c567b78 | 672 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
673 | igmp6_join_group(mc); |
674 | return; | |
675 | } | |
676 | /* else v2 */ | |
677 | ||
678 | mc->mca_crcount = mc->idev->mc_qrv; | |
679 | mld_ifc_event(mc->idev); | |
680 | } | |
681 | ||
682 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
683 | { | |
684 | struct net_device *dev = mc->idev->dev; | |
685 | char buf[MAX_ADDR_LEN]; | |
686 | ||
ec16ef22 YH |
687 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
688 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
689 | return; | |
690 | ||
1da177e4 LT |
691 | spin_lock_bh(&mc->mca_lock); |
692 | if (mc->mca_flags&MAF_LOADED) { | |
693 | mc->mca_flags &= ~MAF_LOADED; | |
694 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 695 | dev_mc_del(dev, buf); |
1da177e4 LT |
696 | } |
697 | ||
698 | if (mc->mca_flags & MAF_NOREPORT) | |
699 | goto done; | |
700 | spin_unlock_bh(&mc->mca_lock); | |
701 | ||
702 | if (!mc->idev->dead) | |
703 | igmp6_leave_group(mc); | |
704 | ||
705 | spin_lock_bh(&mc->mca_lock); | |
706 | if (del_timer(&mc->mca_timer)) | |
707 | atomic_dec(&mc->mca_refcnt); | |
708 | done: | |
709 | ip6_mc_clear_src(mc); | |
710 | spin_unlock_bh(&mc->mca_lock); | |
711 | } | |
712 | ||
713 | /* | |
714 | * deleted ifmcaddr6 manipulation | |
715 | */ | |
716 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
717 | { | |
718 | struct ifmcaddr6 *pmc; | |
719 | ||
720 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
721 | * are actually used. In particular, the refcnt and users are not | |
722 | * used for management of the delete list. Using the same structure | |
723 | * for deleted items allows change reports to use common code with | |
724 | * non-deleted or query-response MCA's. | |
725 | */ | |
0c600eda | 726 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
727 | if (!pmc) |
728 | return; | |
0c600eda | 729 | |
1da177e4 LT |
730 | spin_lock_bh(&im->mca_lock); |
731 | spin_lock_init(&pmc->mca_lock); | |
732 | pmc->idev = im->idev; | |
733 | in6_dev_hold(idev); | |
734 | pmc->mca_addr = im->mca_addr; | |
735 | pmc->mca_crcount = idev->mc_qrv; | |
736 | pmc->mca_sfmode = im->mca_sfmode; | |
737 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
738 | struct ip6_sf_list *psf; | |
739 | ||
740 | pmc->mca_tomb = im->mca_tomb; | |
741 | pmc->mca_sources = im->mca_sources; | |
742 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 743 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
744 | psf->sf_crcount = pmc->mca_crcount; |
745 | } | |
746 | spin_unlock_bh(&im->mca_lock); | |
747 | ||
6457d26b | 748 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
749 | pmc->next = idev->mc_tomb; |
750 | idev->mc_tomb = pmc; | |
6457d26b | 751 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
752 | } |
753 | ||
b71d1d42 | 754 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca) |
1da177e4 LT |
755 | { |
756 | struct ifmcaddr6 *pmc, *pmc_prev; | |
757 | struct ip6_sf_list *psf, *psf_next; | |
758 | ||
6457d26b | 759 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 760 | pmc_prev = NULL; |
67ba4152 | 761 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
762 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
763 | break; | |
764 | pmc_prev = pmc; | |
765 | } | |
766 | if (pmc) { | |
767 | if (pmc_prev) | |
768 | pmc_prev->next = pmc->next; | |
769 | else | |
770 | idev->mc_tomb = pmc->next; | |
771 | } | |
6457d26b SH |
772 | spin_unlock_bh(&idev->mc_lock); |
773 | ||
1da177e4 | 774 | if (pmc) { |
67ba4152 | 775 | for (psf = pmc->mca_tomb; psf; psf = psf_next) { |
1da177e4 LT |
776 | psf_next = psf->sf_next; |
777 | kfree(psf); | |
778 | } | |
779 | in6_dev_put(pmc->idev); | |
780 | kfree(pmc); | |
781 | } | |
782 | } | |
783 | ||
784 | static void mld_clear_delrec(struct inet6_dev *idev) | |
785 | { | |
786 | struct ifmcaddr6 *pmc, *nextpmc; | |
787 | ||
6457d26b | 788 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
789 | pmc = idev->mc_tomb; |
790 | idev->mc_tomb = NULL; | |
6457d26b | 791 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
792 | |
793 | for (; pmc; pmc = nextpmc) { | |
794 | nextpmc = pmc->next; | |
795 | ip6_mc_clear_src(pmc); | |
796 | in6_dev_put(pmc->idev); | |
797 | kfree(pmc); | |
798 | } | |
799 | ||
800 | /* clear dead sources, too */ | |
801 | read_lock_bh(&idev->lock); | |
67ba4152 | 802 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
803 | struct ip6_sf_list *psf, *psf_next; |
804 | ||
805 | spin_lock_bh(&pmc->mca_lock); | |
806 | psf = pmc->mca_tomb; | |
807 | pmc->mca_tomb = NULL; | |
808 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 809 | for (; psf; psf = psf_next) { |
1da177e4 LT |
810 | psf_next = psf->sf_next; |
811 | kfree(psf); | |
812 | } | |
813 | } | |
814 | read_unlock_bh(&idev->lock); | |
815 | } | |
816 | ||
817 | ||
818 | /* | |
819 | * device multicast group inc (add if not found) | |
820 | */ | |
9acd9f3a | 821 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
822 | { |
823 | struct ifmcaddr6 *mc; | |
824 | struct inet6_dev *idev; | |
825 | ||
a9ed4a29 SD |
826 | ASSERT_RTNL(); |
827 | ||
96b52e61 | 828 | /* we need to take a reference on idev */ |
1da177e4 LT |
829 | idev = in6_dev_get(dev); |
830 | ||
831 | if (idev == NULL) | |
832 | return -EINVAL; | |
833 | ||
834 | write_lock_bh(&idev->lock); | |
835 | if (idev->dead) { | |
836 | write_unlock_bh(&idev->lock); | |
837 | in6_dev_put(idev); | |
838 | return -ENODEV; | |
839 | } | |
840 | ||
841 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
842 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
843 | mc->mca_users++; | |
844 | write_unlock_bh(&idev->lock); | |
845 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
846 | NULL, 0); | |
847 | in6_dev_put(idev); | |
848 | return 0; | |
849 | } | |
850 | } | |
851 | ||
852 | /* | |
853 | * not found: create a new one. | |
854 | */ | |
855 | ||
0c600eda | 856 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
857 | |
858 | if (mc == NULL) { | |
859 | write_unlock_bh(&idev->lock); | |
860 | in6_dev_put(idev); | |
861 | return -ENOMEM; | |
862 | } | |
863 | ||
b24b8a24 | 864 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 | 865 | |
4e3fd7a0 | 866 | mc->mca_addr = *addr; |
96b52e61 | 867 | mc->idev = idev; /* (reference taken) */ |
1da177e4 LT |
868 | mc->mca_users = 1; |
869 | /* mca_stamp should be updated upon changes */ | |
870 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
871 | atomic_set(&mc->mca_refcnt, 2); | |
872 | spin_lock_init(&mc->mca_lock); | |
873 | ||
874 | /* initial mode is (EX, empty) */ | |
875 | mc->mca_sfmode = MCAST_EXCLUDE; | |
876 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
877 | ||
878 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
879 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
880 | mc->mca_flags |= MAF_NOREPORT; | |
881 | ||
882 | mc->next = idev->mc_list; | |
883 | idev->mc_list = mc; | |
884 | write_unlock_bh(&idev->lock); | |
885 | ||
886 | mld_del_delrec(idev, &mc->mca_addr); | |
887 | igmp6_group_added(mc); | |
888 | ma_put(mc); | |
889 | return 0; | |
890 | } | |
891 | ||
892 | /* | |
893 | * device multicast group del | |
894 | */ | |
9acd9f3a | 895 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
896 | { |
897 | struct ifmcaddr6 *ma, **map; | |
898 | ||
a9ed4a29 SD |
899 | ASSERT_RTNL(); |
900 | ||
1da177e4 | 901 | write_lock_bh(&idev->lock); |
67ba4152 | 902 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
903 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
904 | if (--ma->mca_users == 0) { | |
905 | *map = ma->next; | |
906 | write_unlock_bh(&idev->lock); | |
907 | ||
908 | igmp6_group_dropped(ma); | |
909 | ||
910 | ma_put(ma); | |
911 | return 0; | |
912 | } | |
913 | write_unlock_bh(&idev->lock); | |
914 | return 0; | |
915 | } | |
916 | } | |
917 | write_unlock_bh(&idev->lock); | |
918 | ||
919 | return -ENOENT; | |
920 | } | |
921 | ||
9acd9f3a | 922 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 923 | { |
96b52e61 | 924 | struct inet6_dev *idev; |
1da177e4 LT |
925 | int err; |
926 | ||
414b6c94 | 927 | ASSERT_RTNL(); |
1da177e4 | 928 | |
96b52e61 ED |
929 | idev = __in6_dev_get(dev); |
930 | if (!idev) | |
931 | err = -ENODEV; | |
932 | else | |
933 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
934 | |
935 | return err; | |
936 | } | |
937 | ||
1da177e4 LT |
938 | /* |
939 | * check if the interface/address pair is valid | |
940 | */ | |
a50feda5 ED |
941 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
942 | const struct in6_addr *src_addr) | |
1da177e4 LT |
943 | { |
944 | struct inet6_dev *idev; | |
945 | struct ifmcaddr6 *mc; | |
a50feda5 | 946 | bool rv = false; |
1da177e4 | 947 | |
96b52e61 ED |
948 | rcu_read_lock(); |
949 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
950 | if (idev) { |
951 | read_lock_bh(&idev->lock); | |
67ba4152 | 952 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
953 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
954 | break; | |
955 | } | |
956 | if (mc) { | |
957 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
958 | struct ip6_sf_list *psf; | |
959 | ||
960 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 961 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
962 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
963 | break; | |
964 | } | |
965 | if (psf) | |
966 | rv = psf->sf_count[MCAST_INCLUDE] || | |
967 | psf->sf_count[MCAST_EXCLUDE] != | |
968 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
969 | else | |
67ba4152 | 970 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
971 | spin_unlock_bh(&mc->mca_lock); |
972 | } else | |
a50feda5 | 973 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
974 | } |
975 | read_unlock_bh(&idev->lock); | |
1da177e4 | 976 | } |
96b52e61 | 977 | rcu_read_unlock(); |
1da177e4 LT |
978 | return rv; |
979 | } | |
980 | ||
981 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
982 | { | |
63862b5b | 983 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
984 | |
985 | idev->mc_gq_running = 1; | |
986 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
987 | in6_dev_hold(idev); | |
988 | } | |
989 | ||
b4af8def DB |
990 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
991 | { | |
992 | idev->mc_gq_running = 0; | |
993 | if (del_timer(&idev->mc_gq_timer)) | |
994 | __in6_dev_put(idev); | |
995 | } | |
996 | ||
c2cef4e8 | 997 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 998 | { |
63862b5b | 999 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1000 | |
1001 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1002 | in6_dev_hold(idev); | |
1003 | } | |
1004 | ||
b4af8def DB |
1005 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1006 | { | |
1007 | idev->mc_ifc_count = 0; | |
1008 | if (del_timer(&idev->mc_ifc_timer)) | |
1009 | __in6_dev_put(idev); | |
1010 | } | |
1011 | ||
c2cef4e8 | 1012 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1013 | { |
63862b5b | 1014 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1015 | |
1016 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1017 | in6_dev_hold(idev); | |
1018 | } | |
1019 | ||
b4af8def DB |
1020 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1021 | { | |
1022 | if (del_timer(&idev->mc_dad_timer)) | |
1023 | __in6_dev_put(idev); | |
1024 | } | |
1025 | ||
1da177e4 LT |
1026 | /* |
1027 | * IGMP handling (alias multicast ICMPv6 messages) | |
1028 | */ | |
1029 | ||
1030 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1031 | { | |
1032 | unsigned long delay = resptime; | |
1033 | ||
1034 | /* Do not start timer for these addresses */ | |
1035 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1036 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1037 | return; | |
1038 | ||
1039 | if (del_timer(&ma->mca_timer)) { | |
1040 | atomic_dec(&ma->mca_refcnt); | |
1041 | delay = ma->mca_timer.expires - jiffies; | |
1042 | } | |
1043 | ||
cc7f7ab7 | 1044 | if (delay >= resptime) |
63862b5b | 1045 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1046 | |
1da177e4 LT |
1047 | ma->mca_timer.expires = jiffies + delay; |
1048 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1049 | atomic_inc(&ma->mca_refcnt); | |
1050 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1051 | } | |
1052 | ||
5ab4a6c8 | 1053 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1054 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1055 | const struct in6_addr *srcs) | |
1da177e4 LT |
1056 | { |
1057 | struct ip6_sf_list *psf; | |
1058 | int i, scount; | |
1059 | ||
1060 | scount = 0; | |
67ba4152 | 1061 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1062 | if (scount == nsrcs) |
1063 | break; | |
67ba4152 | 1064 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1065 | /* skip inactive filters */ |
e05c4ad3 | 1066 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1067 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1068 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1069 | break; |
5ab4a6c8 DS |
1070 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1071 | scount++; | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | } | |
1076 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1077 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1078 | return false; |
1079 | return true; | |
5ab4a6c8 DS |
1080 | } |
1081 | ||
a50feda5 ED |
1082 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1083 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1084 | { |
1085 | struct ip6_sf_list *psf; | |
1086 | int i, scount; | |
1087 | ||
1088 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1089 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1090 | ||
1091 | /* mark INCLUDE-mode sources */ | |
1092 | ||
1093 | scount = 0; | |
67ba4152 | 1094 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1095 | if (scount == nsrcs) |
1096 | break; | |
67ba4152 | 1097 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1098 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1099 | psf->sf_gsresp = 1; | |
1100 | scount++; | |
1101 | break; | |
1102 | } | |
5ab4a6c8 DS |
1103 | } |
1104 | } | |
1105 | if (!scount) { | |
1106 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1107 | return false; |
1da177e4 | 1108 | } |
5ab4a6c8 | 1109 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1110 | return true; |
1da177e4 LT |
1111 | } |
1112 | ||
58c0ecfd DB |
1113 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1114 | { | |
1115 | /* Normally, both are 0 here. If enforcement to a particular is | |
1116 | * being used, individual device enforcement will have a lower | |
1117 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1118 | */ | |
1119 | ||
1120 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1121 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1122 | else | |
1123 | return idev->cnf.force_mld_version; | |
1124 | } | |
1125 | ||
1126 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1127 | { | |
1128 | return mld_force_mld_version(idev) == 2; | |
1129 | } | |
1130 | ||
1131 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1132 | { | |
1133 | return mld_force_mld_version(idev) == 1; | |
1134 | } | |
1135 | ||
6c567b78 DB |
1136 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1137 | { | |
58c0ecfd DB |
1138 | if (mld_in_v2_mode_only(idev)) |
1139 | return false; | |
1140 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1141 | return true; |
1142 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1143 | return true; | |
1144 | ||
1145 | return false; | |
1146 | } | |
1147 | ||
89225d1c DB |
1148 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1149 | { | |
1150 | /* RFC3810, relevant sections: | |
1151 | * - 9.1. Robustness Variable | |
1152 | * - 9.2. Query Interval | |
1153 | * - 9.3. Query Response Interval | |
1154 | * - 9.12. Older Version Querier Present Timeout | |
1155 | */ | |
1156 | unsigned long switchback; | |
1157 | ||
1158 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1159 | ||
1160 | idev->mc_v1_seen = jiffies + switchback; | |
1161 | } | |
1162 | ||
1163 | static void mld_update_qrv(struct inet6_dev *idev, | |
1164 | const struct mld2_query *mlh2) | |
1165 | { | |
1166 | /* RFC3810, relevant sections: | |
1167 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1168 | * - 9.1. Robustness Variable | |
1169 | */ | |
1170 | ||
1171 | /* The value of the Robustness Variable MUST NOT be zero, | |
1172 | * and SHOULD NOT be one. Catch this here if we ever run | |
1173 | * into such a case in future. | |
1174 | */ | |
2f711939 | 1175 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1176 | WARN_ON(idev->mc_qrv == 0); |
1177 | ||
1178 | if (mlh2->mld2q_qrv > 0) | |
1179 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1180 | ||
2f711939 | 1181 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1182 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1183 | idev->mc_qrv, min_qrv); |
1184 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1185 | } |
1186 | } | |
1187 | ||
1188 | static void mld_update_qi(struct inet6_dev *idev, | |
1189 | const struct mld2_query *mlh2) | |
1190 | { | |
1191 | /* RFC3810, relevant sections: | |
1192 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1193 | * - 9.2. Query Interval | |
1194 | * - 9.12. Older Version Querier Present Timeout | |
1195 | * (the [Query Interval] in the last Query received) | |
1196 | */ | |
1197 | unsigned long mc_qqi; | |
1198 | ||
1199 | if (mlh2->mld2q_qqic < 128) { | |
1200 | mc_qqi = mlh2->mld2q_qqic; | |
1201 | } else { | |
1202 | unsigned long mc_man, mc_exp; | |
1203 | ||
1204 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1205 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1206 | ||
1207 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1208 | } | |
1209 | ||
1210 | idev->mc_qi = mc_qqi * HZ; | |
1211 | } | |
1212 | ||
1213 | static void mld_update_qri(struct inet6_dev *idev, | |
1214 | const struct mld2_query *mlh2) | |
1215 | { | |
1216 | /* RFC3810, relevant sections: | |
1217 | * - 5.1.3. Maximum Response Code | |
1218 | * - 9.3. Query Response Interval | |
1219 | */ | |
e3f5b170 | 1220 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1221 | } |
1222 | ||
2b7c121f DB |
1223 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
1224 | unsigned long *max_delay) | |
1225 | { | |
1226 | unsigned long mldv1_md; | |
1227 | ||
1228 | /* Ignore v1 queries */ | |
1229 | if (mld_in_v2_mode_only(idev)) | |
1230 | return -EINVAL; | |
1231 | ||
1232 | /* MLDv1 router present */ | |
1233 | mldv1_md = ntohs(mld->mld_maxdelay); | |
1234 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); | |
1235 | ||
1236 | mld_set_v1_mode(idev); | |
1237 | ||
1238 | /* cancel MLDv2 report timer */ | |
b4af8def | 1239 | mld_gq_stop_timer(idev); |
2b7c121f | 1240 | /* cancel the interface change timer */ |
b4af8def | 1241 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1242 | /* clear deleted report items */ |
1243 | mld_clear_delrec(idev); | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1249 | unsigned long *max_delay) | |
1250 | { | |
1251 | /* hosts need to stay in MLDv1 mode, discard MLDv2 queries */ | |
1252 | if (mld_in_v1_mode(idev)) | |
1253 | return -EINVAL; | |
1254 | ||
1255 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); | |
1256 | ||
1257 | mld_update_qrv(idev, mld); | |
1258 | mld_update_qi(idev, mld); | |
1259 | mld_update_qri(idev, mld); | |
1260 | ||
1261 | idev->mc_maxdelay = *max_delay; | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
96b52e61 | 1266 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1267 | int igmp6_event_query(struct sk_buff *skb) |
1268 | { | |
97300b5f | 1269 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1270 | struct ifmcaddr6 *ma; |
b71d1d42 | 1271 | const struct in6_addr *group; |
1da177e4 LT |
1272 | unsigned long max_delay; |
1273 | struct inet6_dev *idev; | |
6e7cb837 | 1274 | struct mld_msg *mld; |
1da177e4 LT |
1275 | int group_type; |
1276 | int mark = 0; | |
2b7c121f | 1277 | int len, err; |
1da177e4 LT |
1278 | |
1279 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1280 | return -EINVAL; | |
1281 | ||
1282 | /* compute payload length excluding extension headers */ | |
0660e03f | 1283 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1284 | len -= skb_network_header_len(skb); |
1da177e4 | 1285 | |
e940f5d6 HL |
1286 | /* RFC3810 6.2 |
1287 | * Upon reception of an MLD message that contains a Query, the node | |
1288 | * checks if the source address of the message is a valid link-local | |
1289 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1290 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1291 | * packet. If any of these checks fails, the packet is dropped. | |
1292 | */ | |
1293 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1294 | ipv6_hdr(skb)->hop_limit != 1 || | |
1295 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1296 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1297 | return -EINVAL; |
1298 | ||
96b52e61 | 1299 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1300 | if (idev == NULL) |
1301 | return 0; | |
1302 | ||
6e7cb837 YH |
1303 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1304 | group = &mld->mld_mca; | |
1da177e4 LT |
1305 | group_type = ipv6_addr_type(group); |
1306 | ||
1307 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1308 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1309 | return -EINVAL; |
1da177e4 | 1310 | |
9fd07841 | 1311 | if (len == MLD_V1_QUERY_LEN) { |
2b7c121f DB |
1312 | err = mld_process_v1(idev, mld, &max_delay); |
1313 | if (err < 0) | |
1314 | return err; | |
9fd07841 | 1315 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1316 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1317 | sizeof(struct icmp6hdr); |
89225d1c | 1318 | |
96b52e61 | 1319 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1320 | return -EINVAL; |
96b52e61 | 1321 | |
9c70220b | 1322 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1323 | |
2b7c121f DB |
1324 | err = mld_process_v2(idev, mlh2, &max_delay); |
1325 | if (err < 0) | |
1326 | return err; | |
89225d1c | 1327 | |
1da177e4 | 1328 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1329 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1330 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1331 | |
1da177e4 | 1332 | mld_gq_start_timer(idev); |
1da177e4 LT |
1333 | return 0; |
1334 | } | |
1335 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1336 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1337 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1338 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1339 | return -EINVAL; |
96b52e61 | 1340 | |
9c70220b | 1341 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1342 | mark = 1; |
1343 | } | |
96b52e61 | 1344 | } else |
1da177e4 | 1345 | return -EINVAL; |
1da177e4 LT |
1346 | |
1347 | read_lock_bh(&idev->lock); | |
1348 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1349 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1350 | spin_lock_bh(&ma->mca_lock); |
1351 | igmp6_group_queried(ma, max_delay); | |
1352 | spin_unlock_bh(&ma->mca_lock); | |
1353 | } | |
1354 | } else { | |
67ba4152 | 1355 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1356 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1357 | continue; |
1358 | spin_lock_bh(&ma->mca_lock); | |
1359 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1360 | /* gsquery <- gsquery && mark */ | |
1361 | if (!mark) | |
1362 | ma->mca_flags &= ~MAF_GSQUERY; | |
1363 | } else { | |
1364 | /* gsquery <- mark */ | |
1365 | if (mark) | |
1366 | ma->mca_flags |= MAF_GSQUERY; | |
1367 | else | |
1368 | ma->mca_flags &= ~MAF_GSQUERY; | |
1369 | } | |
5ab4a6c8 | 1370 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1371 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1372 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1373 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1374 | break; |
1da177e4 LT |
1375 | } |
1376 | } | |
1377 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1378 | |
1379 | return 0; | |
1380 | } | |
1381 | ||
96b52e61 | 1382 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1383 | int igmp6_event_report(struct sk_buff *skb) |
1384 | { | |
1385 | struct ifmcaddr6 *ma; | |
1da177e4 | 1386 | struct inet6_dev *idev; |
6e7cb837 | 1387 | struct mld_msg *mld; |
1da177e4 LT |
1388 | int addr_type; |
1389 | ||
1390 | /* Our own report looped back. Ignore it. */ | |
1391 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1392 | return 0; | |
1393 | ||
24c69275 DS |
1394 | /* send our report if the MC router may not have heard this report */ |
1395 | if (skb->pkt_type != PACKET_MULTICAST && | |
1396 | skb->pkt_type != PACKET_BROADCAST) | |
1397 | return 0; | |
1398 | ||
6e7cb837 | 1399 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1400 | return -EINVAL; |
1401 | ||
6e7cb837 | 1402 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1403 | |
1404 | /* Drop reports with not link local source */ | |
0660e03f | 1405 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1406 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1407 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1408 | return -EINVAL; | |
1409 | ||
96b52e61 | 1410 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1411 | if (idev == NULL) |
1412 | return -ENODEV; | |
1413 | ||
1414 | /* | |
1415 | * Cancel the timer for this group | |
1416 | */ | |
1417 | ||
1418 | read_lock_bh(&idev->lock); | |
67ba4152 | 1419 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1420 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1421 | spin_lock(&ma->mca_lock); |
1422 | if (del_timer(&ma->mca_timer)) | |
1423 | atomic_dec(&ma->mca_refcnt); | |
1424 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1425 | spin_unlock(&ma->mca_lock); | |
1426 | break; | |
1427 | } | |
1428 | } | |
1429 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1430 | return 0; |
1431 | } | |
1432 | ||
a50feda5 ED |
1433 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1434 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1435 | { |
1436 | switch (type) { | |
1437 | case MLD2_MODE_IS_INCLUDE: | |
1438 | case MLD2_MODE_IS_EXCLUDE: | |
1439 | if (gdeleted || sdeleted) | |
a50feda5 | 1440 | return false; |
5ab4a6c8 DS |
1441 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1442 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1443 | return true; |
5ab4a6c8 DS |
1444 | /* don't include if this source is excluded |
1445 | * in all filters | |
1446 | */ | |
1447 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1448 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1449 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1450 | psf->sf_count[MCAST_EXCLUDE]; | |
1451 | } | |
a50feda5 | 1452 | return false; |
1da177e4 LT |
1453 | case MLD2_CHANGE_TO_INCLUDE: |
1454 | if (gdeleted || sdeleted) | |
a50feda5 | 1455 | return false; |
1da177e4 LT |
1456 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1457 | case MLD2_CHANGE_TO_EXCLUDE: | |
1458 | if (gdeleted || sdeleted) | |
a50feda5 | 1459 | return false; |
1da177e4 LT |
1460 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1461 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1462 | return false; |
1da177e4 LT |
1463 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1464 | psf->sf_count[MCAST_EXCLUDE]; | |
1465 | case MLD2_ALLOW_NEW_SOURCES: | |
1466 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1467 | return false; |
1da177e4 LT |
1468 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1469 | case MLD2_BLOCK_OLD_SOURCES: | |
1470 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1471 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1472 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1473 | } | |
a50feda5 | 1474 | return false; |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | static int | |
1478 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1479 | { | |
1480 | struct ip6_sf_list *psf; | |
1481 | int scount = 0; | |
1482 | ||
67ba4152 | 1483 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1484 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1485 | continue; | |
1486 | scount++; | |
1487 | } | |
1488 | return scount; | |
1489 | } | |
1490 | ||
2576f17d YH |
1491 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1492 | struct net_device *dev, | |
1493 | const struct in6_addr *saddr, | |
1494 | const struct in6_addr *daddr, | |
1495 | int proto, int len) | |
1496 | { | |
1497 | struct ipv6hdr *hdr; | |
1498 | ||
1499 | skb->protocol = htons(ETH_P_IPV6); | |
1500 | skb->dev = dev; | |
1501 | ||
1502 | skb_reset_network_header(skb); | |
1503 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1504 | hdr = ipv6_hdr(skb); | |
1505 | ||
1506 | ip6_flow_hdr(hdr, 0, 0); | |
1507 | ||
1508 | hdr->payload_len = htons(len); | |
1509 | hdr->nexthdr = proto; | |
1510 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1511 | ||
1512 | hdr->saddr = *saddr; | |
1513 | hdr->daddr = *daddr; | |
1514 | } | |
1515 | ||
8965779d | 1516 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size) |
1da177e4 | 1517 | { |
8965779d | 1518 | struct net_device *dev = idev->dev; |
c346dca1 | 1519 | struct net *net = dev_net(dev); |
b8ad0cbc | 1520 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1521 | struct sk_buff *skb; |
1522 | struct mld2_report *pmr; | |
1523 | struct in6_addr addr_buf; | |
d7aabf22 | 1524 | const struct in6_addr *saddr; |
a7ae1992 HX |
1525 | int hlen = LL_RESERVED_SPACE(dev); |
1526 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1527 | int err; |
1528 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1529 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1530 | IPV6_TLV_PADN, 0 }; | |
1531 | ||
1532 | /* we assume size > sizeof(ra) here */ | |
a7ae1992 | 1533 | size += hlen + tlen; |
72e09ad1 ED |
1534 | /* limit our allocations to order-0 page */ |
1535 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1536 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1537 | |
cfcabdcc | 1538 | if (!skb) |
1da177e4 LT |
1539 | return NULL; |
1540 | ||
9d4a0314 | 1541 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1542 | skb_reserve(skb, hlen); |
1da177e4 | 1543 | |
8965779d | 1544 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1545 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1546 | * use unspecified address as the source address |
1da177e4 LT |
1547 | * when a valid link-local address is not available. |
1548 | */ | |
d7aabf22 YH |
1549 | saddr = &in6addr_any; |
1550 | } else | |
1551 | saddr = &addr_buf; | |
1da177e4 | 1552 | |
2576f17d | 1553 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1554 | |
1555 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1556 | ||
27a884dc | 1557 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1558 | skb_put(skb, sizeof(*pmr)); |
1559 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1560 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1561 | pmr->mld2r_resv1 = 0; | |
1562 | pmr->mld2r_cksum = 0; | |
1563 | pmr->mld2r_resv2 = 0; | |
1564 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1565 | return skb; |
1566 | } | |
1567 | ||
1568 | static void mld_sendpack(struct sk_buff *skb) | |
1569 | { | |
0660e03f | 1570 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1571 | struct mld2_report *pmr = |
1572 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1573 | int payload_len, mldlen; |
96b52e61 | 1574 | struct inet6_dev *idev; |
c346dca1 | 1575 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1576 | int err; |
4c9483b2 | 1577 | struct flowi6 fl6; |
adf30907 | 1578 | struct dst_entry *dst; |
1da177e4 | 1579 | |
96b52e61 ED |
1580 | rcu_read_lock(); |
1581 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1582 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1583 | ||
29a3cad5 SH |
1584 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1585 | sizeof(*pip6); | |
1586 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1587 | pip6->payload_len = htons(payload_len); |
1588 | ||
6e7cb837 YH |
1589 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1590 | IPPROTO_ICMPV6, | |
1591 | csum_partial(skb_transport_header(skb), | |
1592 | mldlen, 0)); | |
41927178 | 1593 | |
4c9483b2 | 1594 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1595 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1596 | skb->dev->ifindex); | |
12fd84f4 | 1597 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1598 | |
452edd59 DM |
1599 | err = 0; |
1600 | if (IS_ERR(dst)) { | |
1601 | err = PTR_ERR(dst); | |
1602 | dst = NULL; | |
1603 | } | |
adf30907 | 1604 | skb_dst_set(skb, dst); |
41927178 YH |
1605 | if (err) |
1606 | goto err_out; | |
1607 | ||
edf391ff NH |
1608 | payload_len = skb->len; |
1609 | ||
b2e0b385 | 1610 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1611 | dst_output); |
1612 | out: | |
1da177e4 | 1613 | if (!err) { |
43a43b60 HFS |
1614 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1615 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
1616 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); | |
1617 | } else { | |
1618 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1619 | } | |
1da177e4 | 1620 | |
96b52e61 | 1621 | rcu_read_unlock(); |
41927178 YH |
1622 | return; |
1623 | ||
1624 | err_out: | |
1625 | kfree_skb(skb); | |
1626 | goto out; | |
1da177e4 LT |
1627 | } |
1628 | ||
1629 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1630 | { | |
fab10fe3 | 1631 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1632 | } |
1633 | ||
1634 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1635 | int type, struct mld2_grec **ppgr) | |
1636 | { | |
1637 | struct net_device *dev = pmc->idev->dev; | |
1638 | struct mld2_report *pmr; | |
1639 | struct mld2_grec *pgr; | |
1640 | ||
1641 | if (!skb) | |
8965779d | 1642 | skb = mld_newpack(pmc->idev, dev->mtu); |
1da177e4 LT |
1643 | if (!skb) |
1644 | return NULL; | |
1645 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1646 | pgr->grec_type = type; | |
1647 | pgr->grec_auxwords = 0; | |
1648 | pgr->grec_nsrcs = 0; | |
1649 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1650 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1651 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1652 | *ppgr = pgr; |
1653 | return skb; | |
1654 | } | |
1655 | ||
1656 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1657 | skb_tailroom(skb)) : 0) | |
1658 | ||
1659 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1660 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1661 | { |
8965779d AW |
1662 | struct inet6_dev *idev = pmc->idev; |
1663 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1664 | struct mld2_report *pmr; |
1665 | struct mld2_grec *pgr = NULL; | |
1666 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1667 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1668 | |
1669 | if (pmc->mca_flags & MAF_NOREPORT) | |
1670 | return skb; | |
1671 | ||
1672 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1673 | type == MLD2_MODE_IS_EXCLUDE; | |
1674 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1675 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1676 | ||
5ab4a6c8 DS |
1677 | stotal = scount = 0; |
1678 | ||
1da177e4 LT |
1679 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1680 | ||
5ab4a6c8 DS |
1681 | if (!*psf_list) |
1682 | goto empty_source; | |
1683 | ||
9c70220b | 1684 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1685 | |
1686 | /* EX and TO_EX get a fresh packet, if needed */ | |
1687 | if (truncate) { | |
6e7cb837 | 1688 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1689 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1690 | if (skb) | |
1691 | mld_sendpack(skb); | |
8965779d | 1692 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1693 | } |
1694 | } | |
1695 | first = 1; | |
1da177e4 | 1696 | psf_prev = NULL; |
67ba4152 | 1697 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1698 | struct in6_addr *psrc; |
1699 | ||
1700 | psf_next = psf->sf_next; | |
1701 | ||
1702 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1703 | psf_prev = psf; | |
1704 | continue; | |
1705 | } | |
1706 | ||
1707 | /* clear marks on query responses */ | |
1708 | if (isquery) | |
1709 | psf->sf_gsresp = 0; | |
1710 | ||
1711 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1712 | first*sizeof(struct mld2_grec)) { | |
1713 | if (truncate && !first) | |
1714 | break; /* truncate these */ | |
1715 | if (pgr) | |
1716 | pgr->grec_nsrcs = htons(scount); | |
1717 | if (skb) | |
1718 | mld_sendpack(skb); | |
8965779d | 1719 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1720 | first = 1; |
1721 | scount = 0; | |
1722 | } | |
1723 | if (first) { | |
1724 | skb = add_grhead(skb, pmc, type, &pgr); | |
1725 | first = 0; | |
1726 | } | |
cc63f70b AD |
1727 | if (!skb) |
1728 | return NULL; | |
1da177e4 LT |
1729 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1730 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1731 | scount++; stotal++; |
1da177e4 LT |
1732 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1733 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1734 | psf->sf_crcount--; | |
1735 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1736 | if (psf_prev) | |
1737 | psf_prev->sf_next = psf->sf_next; | |
1738 | else | |
1739 | *psf_list = psf->sf_next; | |
1740 | kfree(psf); | |
1741 | continue; | |
1742 | } | |
1743 | } | |
1744 | psf_prev = psf; | |
1745 | } | |
5ab4a6c8 DS |
1746 | |
1747 | empty_source: | |
1748 | if (!stotal) { | |
1749 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1750 | type == MLD2_BLOCK_OLD_SOURCES) | |
1751 | return skb; | |
6a7cc418 | 1752 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1753 | /* make sure we have room for group header */ |
1754 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1755 | mld_sendpack(skb); | |
1756 | skb = NULL; /* add_grhead will get a new one */ | |
1757 | } | |
1758 | skb = add_grhead(skb, pmc, type, &pgr); | |
1759 | } | |
1760 | } | |
1da177e4 LT |
1761 | if (pgr) |
1762 | pgr->grec_nsrcs = htons(scount); | |
1763 | ||
1764 | if (isquery) | |
1765 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1766 | return skb; | |
1767 | } | |
1768 | ||
1769 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1770 | { | |
1771 | struct sk_buff *skb = NULL; | |
1772 | int type; | |
1773 | ||
8965779d | 1774 | read_lock_bh(&idev->lock); |
1da177e4 | 1775 | if (!pmc) { |
67ba4152 | 1776 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1777 | if (pmc->mca_flags & MAF_NOREPORT) |
1778 | continue; | |
1779 | spin_lock_bh(&pmc->mca_lock); | |
1780 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1781 | type = MLD2_MODE_IS_EXCLUDE; | |
1782 | else | |
1783 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1784 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1785 | spin_unlock_bh(&pmc->mca_lock); |
1786 | } | |
1da177e4 LT |
1787 | } else { |
1788 | spin_lock_bh(&pmc->mca_lock); | |
1789 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1790 | type = MLD2_MODE_IS_EXCLUDE; | |
1791 | else | |
1792 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1793 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1794 | spin_unlock_bh(&pmc->mca_lock); |
1795 | } | |
8965779d | 1796 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1797 | if (skb) |
1798 | mld_sendpack(skb); | |
1799 | } | |
1800 | ||
1801 | /* | |
1802 | * remove zero-count source records from a source filter list | |
1803 | */ | |
1804 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1805 | { | |
1806 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1807 | ||
1808 | psf_prev = NULL; | |
67ba4152 | 1809 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1810 | psf_next = psf->sf_next; |
1811 | if (psf->sf_crcount == 0) { | |
1812 | if (psf_prev) | |
1813 | psf_prev->sf_next = psf->sf_next; | |
1814 | else | |
1815 | *ppsf = psf->sf_next; | |
1816 | kfree(psf); | |
1817 | } else | |
1818 | psf_prev = psf; | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | static void mld_send_cr(struct inet6_dev *idev) | |
1823 | { | |
1824 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1825 | struct sk_buff *skb = NULL; | |
1826 | int type, dtype; | |
1827 | ||
1828 | read_lock_bh(&idev->lock); | |
6457d26b | 1829 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1830 | |
1831 | /* deleted MCA's */ | |
1832 | pmc_prev = NULL; | |
67ba4152 | 1833 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1834 | pmc_next = pmc->next; |
1835 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1836 | type = MLD2_BLOCK_OLD_SOURCES; | |
1837 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1838 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1839 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1840 | } |
1841 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1842 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1843 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1844 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1845 | } |
5ab4a6c8 | 1846 | pmc->mca_crcount--; |
1da177e4 LT |
1847 | if (pmc->mca_crcount == 0) { |
1848 | mld_clear_zeros(&pmc->mca_tomb); | |
1849 | mld_clear_zeros(&pmc->mca_sources); | |
1850 | } | |
1851 | } | |
1852 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1853 | !pmc->mca_sources) { | |
1854 | if (pmc_prev) | |
1855 | pmc_prev->next = pmc_next; | |
1856 | else | |
1857 | idev->mc_tomb = pmc_next; | |
1858 | in6_dev_put(pmc->idev); | |
1859 | kfree(pmc); | |
1860 | } else | |
1861 | pmc_prev = pmc; | |
1862 | } | |
6457d26b | 1863 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1864 | |
1865 | /* change recs */ | |
67ba4152 | 1866 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1867 | spin_lock_bh(&pmc->mca_lock); |
1868 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1869 | type = MLD2_BLOCK_OLD_SOURCES; | |
1870 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1871 | } else { | |
1872 | type = MLD2_ALLOW_NEW_SOURCES; | |
1873 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1874 | } | |
6a7cc418 FL |
1875 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1876 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1877 | |
1878 | /* filter mode changes */ | |
1879 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1880 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1881 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1882 | else | |
1883 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1884 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1885 | pmc->mca_crcount--; |
1da177e4 LT |
1886 | } |
1887 | spin_unlock_bh(&pmc->mca_lock); | |
1888 | } | |
1889 | read_unlock_bh(&idev->lock); | |
1890 | if (!skb) | |
1891 | return; | |
1892 | (void) mld_sendpack(skb); | |
1893 | } | |
1894 | ||
1895 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1896 | { | |
c346dca1 | 1897 | struct net *net = dev_net(dev); |
b8ad0cbc | 1898 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1899 | struct inet6_dev *idev; |
1ab1457c | 1900 | struct sk_buff *skb; |
6e7cb837 | 1901 | struct mld_msg *hdr; |
d7aabf22 | 1902 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1903 | struct in6_addr addr_buf; |
a7ae1992 HX |
1904 | int hlen = LL_RESERVED_SPACE(dev); |
1905 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1906 | int err, len, payload_len, full_len; |
1907 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1908 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1909 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1910 | struct flowi6 fl6; |
adf30907 | 1911 | struct dst_entry *dst; |
1da177e4 | 1912 | |
f3ee4010 YH |
1913 | if (type == ICMPV6_MGM_REDUCTION) |
1914 | snd_addr = &in6addr_linklocal_allrouters; | |
1915 | else | |
1916 | snd_addr = addr; | |
1da177e4 LT |
1917 | |
1918 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1919 | payload_len = len + sizeof(ra); | |
1920 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1921 | ||
edf391ff NH |
1922 | rcu_read_lock(); |
1923 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1924 | IPSTATS_MIB_OUT, full_len); | |
1925 | rcu_read_unlock(); | |
1926 | ||
a7ae1992 | 1927 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 LT |
1928 | |
1929 | if (skb == NULL) { | |
a11d206d | 1930 | rcu_read_lock(); |
3bd653c8 | 1931 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1932 | IPSTATS_MIB_OUTDISCARDS); |
1933 | rcu_read_unlock(); | |
1da177e4 LT |
1934 | return; |
1935 | } | |
9d4a0314 | 1936 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1937 | skb_reserve(skb, hlen); |
1da177e4 | 1938 | |
95c385b4 | 1939 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1940 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1941 | * use unspecified address as the source address |
1da177e4 LT |
1942 | * when a valid link-local address is not available. |
1943 | */ | |
d7aabf22 YH |
1944 | saddr = &in6addr_any; |
1945 | } else | |
1946 | saddr = &addr_buf; | |
1da177e4 | 1947 | |
2576f17d | 1948 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1949 | |
1950 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1951 | ||
6e7cb837 YH |
1952 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1953 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1954 | hdr->mld_type = type; | |
4e3fd7a0 | 1955 | hdr->mld_mca = *addr; |
1da177e4 | 1956 | |
6e7cb837 YH |
1957 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1958 | IPPROTO_ICMPV6, | |
1959 | csum_partial(hdr, len, 0)); | |
1da177e4 | 1960 | |
96b52e61 ED |
1961 | rcu_read_lock(); |
1962 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 1963 | |
4c9483b2 | 1964 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
1965 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1966 | skb->dev->ifindex); | |
12fd84f4 | 1967 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
1968 | if (IS_ERR(dst)) { |
1969 | err = PTR_ERR(dst); | |
41927178 | 1970 | goto err_out; |
452edd59 | 1971 | } |
41927178 | 1972 | |
adf30907 | 1973 | skb_dst_set(skb, dst); |
b2e0b385 | 1974 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1975 | dst_output); |
1976 | out: | |
1da177e4 | 1977 | if (!err) { |
5c5d244b | 1978 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 1979 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1980 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 1981 | } else |
3bd653c8 | 1982 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1983 | |
96b52e61 | 1984 | rcu_read_unlock(); |
1da177e4 | 1985 | return; |
41927178 YH |
1986 | |
1987 | err_out: | |
1988 | kfree_skb(skb); | |
1989 | goto out; | |
1da177e4 LT |
1990 | } |
1991 | ||
6a7cc418 | 1992 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 1993 | { |
6a7cc418 FL |
1994 | struct sk_buff *skb; |
1995 | struct ifmcaddr6 *pmc; | |
1996 | int type; | |
1997 | ||
1998 | if (mld_in_v1_mode(idev)) | |
1999 | return; | |
2000 | ||
2001 | skb = NULL; | |
2002 | read_lock_bh(&idev->lock); | |
67ba4152 | 2003 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2004 | spin_lock_bh(&pmc->mca_lock); |
2005 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2006 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2007 | else | |
2008 | type = MLD2_CHANGE_TO_INCLUDE; | |
2009 | skb = add_grec(skb, pmc, type, 0, 0, 1); | |
2010 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2011 | } |
6a7cc418 FL |
2012 | read_unlock_bh(&idev->lock); |
2013 | if (skb) | |
2014 | mld_sendpack(skb); | |
b173ee48 HFS |
2015 | } |
2016 | ||
2017 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2018 | { | |
2019 | idev->mc_dad_count = idev->mc_qrv; | |
2020 | if (idev->mc_dad_count) { | |
6a7cc418 | 2021 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2022 | idev->mc_dad_count--; |
2023 | if (idev->mc_dad_count) | |
2024 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | static void mld_dad_timer_expire(unsigned long data) | |
2029 | { | |
2030 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2031 | ||
6a7cc418 | 2032 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2033 | if (idev->mc_dad_count) { |
2034 | idev->mc_dad_count--; | |
2035 | if (idev->mc_dad_count) | |
2036 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2037 | } | |
9260d3e1 | 2038 | in6_dev_put(idev); |
b173ee48 HFS |
2039 | } |
2040 | ||
1da177e4 | 2041 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2042 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2043 | { |
2044 | struct ip6_sf_list *psf, *psf_prev; | |
2045 | int rv = 0; | |
2046 | ||
2047 | psf_prev = NULL; | |
67ba4152 | 2048 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2049 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2050 | break; | |
2051 | psf_prev = psf; | |
2052 | } | |
2053 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2054 | /* source filter not found, or count wrong => bug */ | |
2055 | return -ESRCH; | |
2056 | } | |
2057 | psf->sf_count[sfmode]--; | |
2058 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2059 | struct inet6_dev *idev = pmc->idev; | |
2060 | ||
2061 | /* no more filters for this source */ | |
2062 | if (psf_prev) | |
2063 | psf_prev->sf_next = psf->sf_next; | |
2064 | else | |
2065 | pmc->mca_sources = psf->sf_next; | |
2066 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2067 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2068 | psf->sf_crcount = idev->mc_qrv; |
2069 | psf->sf_next = pmc->mca_tomb; | |
2070 | pmc->mca_tomb = psf; | |
2071 | rv = 1; | |
2072 | } else | |
2073 | kfree(psf); | |
2074 | } | |
2075 | return rv; | |
2076 | } | |
2077 | ||
b71d1d42 ED |
2078 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2079 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2080 | int delta) |
2081 | { | |
2082 | struct ifmcaddr6 *pmc; | |
2083 | int changerec = 0; | |
2084 | int i, err; | |
2085 | ||
2086 | if (!idev) | |
2087 | return -ENODEV; | |
2088 | read_lock_bh(&idev->lock); | |
67ba4152 | 2089 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2090 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2091 | break; | |
2092 | } | |
2093 | if (!pmc) { | |
2094 | /* MCA not found?? bug */ | |
2095 | read_unlock_bh(&idev->lock); | |
2096 | return -ESRCH; | |
2097 | } | |
2098 | spin_lock_bh(&pmc->mca_lock); | |
2099 | sf_markstate(pmc); | |
2100 | if (!delta) { | |
2101 | if (!pmc->mca_sfcount[sfmode]) { | |
2102 | spin_unlock_bh(&pmc->mca_lock); | |
2103 | read_unlock_bh(&idev->lock); | |
2104 | return -EINVAL; | |
2105 | } | |
2106 | pmc->mca_sfcount[sfmode]--; | |
2107 | } | |
2108 | err = 0; | |
67ba4152 | 2109 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2110 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2111 | ||
2112 | changerec |= rv > 0; | |
2113 | if (!err && rv < 0) | |
2114 | err = rv; | |
2115 | } | |
2116 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2117 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2118 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2119 | struct ip6_sf_list *psf; | |
2120 | ||
2121 | /* filter mode change */ | |
2122 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2123 | pmc->mca_crcount = idev->mc_qrv; | |
2124 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2125 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2126 | psf->sf_crcount = 0; |
2127 | mld_ifc_event(pmc->idev); | |
2128 | } else if (sf_setstate(pmc) || changerec) | |
2129 | mld_ifc_event(pmc->idev); | |
2130 | spin_unlock_bh(&pmc->mca_lock); | |
2131 | read_unlock_bh(&idev->lock); | |
2132 | return err; | |
2133 | } | |
2134 | ||
2135 | /* | |
2136 | * Add multicast single-source filter to the interface list | |
2137 | */ | |
2138 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2139 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2140 | { |
2141 | struct ip6_sf_list *psf, *psf_prev; | |
2142 | ||
2143 | psf_prev = NULL; | |
67ba4152 | 2144 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2145 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2146 | break; | |
2147 | psf_prev = psf; | |
2148 | } | |
2149 | if (!psf) { | |
0c600eda | 2150 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2151 | if (!psf) |
2152 | return -ENOBUFS; | |
0c600eda | 2153 | |
1da177e4 LT |
2154 | psf->sf_addr = *psfsrc; |
2155 | if (psf_prev) { | |
2156 | psf_prev->sf_next = psf; | |
2157 | } else | |
2158 | pmc->mca_sources = psf; | |
2159 | } | |
2160 | psf->sf_count[sfmode]++; | |
2161 | return 0; | |
2162 | } | |
2163 | ||
2164 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2165 | { | |
2166 | struct ip6_sf_list *psf; | |
2167 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2168 | ||
67ba4152 | 2169 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2170 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2171 | psf->sf_oldin = mca_xcount == | |
2172 | psf->sf_count[MCAST_EXCLUDE] && | |
2173 | !psf->sf_count[MCAST_INCLUDE]; | |
2174 | } else | |
2175 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2176 | } | |
2177 | ||
2178 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2179 | { | |
7add2a43 | 2180 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2181 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2182 | int qrv = pmc->idev->mc_qrv; | |
2183 | int new_in, rv; | |
2184 | ||
2185 | rv = 0; | |
67ba4152 | 2186 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2187 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2188 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2189 | !psf->sf_count[MCAST_INCLUDE]; | |
2190 | } else | |
2191 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2192 | if (new_in) { |
2193 | if (!psf->sf_oldin) { | |
e80e28b6 | 2194 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2195 | |
67ba4152 IM |
2196 | for (dpsf = pmc->mca_tomb; dpsf; |
2197 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2198 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2199 | &psf->sf_addr)) | |
2200 | break; | |
2201 | prev = dpsf; | |
2202 | } | |
2203 | if (dpsf) { | |
2204 | if (prev) | |
2205 | prev->sf_next = dpsf->sf_next; | |
2206 | else | |
2207 | pmc->mca_tomb = dpsf->sf_next; | |
2208 | kfree(dpsf); | |
2209 | } | |
2210 | psf->sf_crcount = qrv; | |
2211 | rv++; | |
2212 | } | |
2213 | } else if (psf->sf_oldin) { | |
2214 | psf->sf_crcount = 0; | |
2215 | /* | |
2216 | * add or update "delete" records if an active filter | |
2217 | * is now inactive | |
2218 | */ | |
67ba4152 | 2219 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2220 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2221 | &psf->sf_addr)) | |
2222 | break; | |
2223 | if (!dpsf) { | |
5d55354f | 2224 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2225 | if (!dpsf) |
2226 | continue; | |
2227 | *dpsf = *psf; | |
2228 | /* pmc->mca_lock held by callers */ | |
2229 | dpsf->sf_next = pmc->mca_tomb; | |
2230 | pmc->mca_tomb = dpsf; | |
2231 | } | |
2232 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2233 | rv++; |
2234 | } | |
2235 | } | |
2236 | return rv; | |
2237 | } | |
2238 | ||
2239 | /* | |
2240 | * Add multicast source filter list to the interface list | |
2241 | */ | |
b71d1d42 ED |
2242 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2243 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2244 | int delta) |
2245 | { | |
2246 | struct ifmcaddr6 *pmc; | |
2247 | int isexclude; | |
2248 | int i, err; | |
2249 | ||
2250 | if (!idev) | |
2251 | return -ENODEV; | |
2252 | read_lock_bh(&idev->lock); | |
67ba4152 | 2253 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2254 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2255 | break; | |
2256 | } | |
2257 | if (!pmc) { | |
2258 | /* MCA not found?? bug */ | |
2259 | read_unlock_bh(&idev->lock); | |
2260 | return -ESRCH; | |
2261 | } | |
2262 | spin_lock_bh(&pmc->mca_lock); | |
2263 | ||
2264 | sf_markstate(pmc); | |
2265 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2266 | if (!delta) | |
2267 | pmc->mca_sfcount[sfmode]++; | |
2268 | err = 0; | |
67ba4152 | 2269 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2270 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2271 | if (err) |
2272 | break; | |
2273 | } | |
2274 | if (err) { | |
2275 | int j; | |
2276 | ||
2277 | if (!delta) | |
2278 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2279 | for (j = 0; j < i; j++) |
78d50217 | 2280 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2281 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2282 | struct ip6_sf_list *psf; |
2283 | ||
2284 | /* filter mode change */ | |
2285 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2286 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2287 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2288 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2289 | /* else no filters; keep old mode for reports */ | |
2290 | ||
2291 | pmc->mca_crcount = idev->mc_qrv; | |
2292 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2293 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2294 | psf->sf_crcount = 0; |
2295 | mld_ifc_event(idev); | |
2296 | } else if (sf_setstate(pmc)) | |
2297 | mld_ifc_event(idev); | |
2298 | spin_unlock_bh(&pmc->mca_lock); | |
2299 | read_unlock_bh(&idev->lock); | |
2300 | return err; | |
2301 | } | |
2302 | ||
2303 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2304 | { | |
2305 | struct ip6_sf_list *psf, *nextpsf; | |
2306 | ||
67ba4152 | 2307 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2308 | nextpsf = psf->sf_next; |
2309 | kfree(psf); | |
2310 | } | |
2311 | pmc->mca_tomb = NULL; | |
67ba4152 | 2312 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2313 | nextpsf = psf->sf_next; |
2314 | kfree(psf); | |
2315 | } | |
2316 | pmc->mca_sources = NULL; | |
2317 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2318 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2319 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2320 | } | |
2321 | ||
2322 | ||
2323 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2324 | { | |
2325 | unsigned long delay; | |
2326 | ||
2327 | if (ma->mca_flags & MAF_NOREPORT) | |
2328 | return; | |
2329 | ||
2330 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2331 | ||
63862b5b | 2332 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2333 | |
2334 | spin_lock_bh(&ma->mca_lock); | |
2335 | if (del_timer(&ma->mca_timer)) { | |
2336 | atomic_dec(&ma->mca_refcnt); | |
2337 | delay = ma->mca_timer.expires - jiffies; | |
2338 | } | |
2339 | ||
2340 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2341 | atomic_inc(&ma->mca_refcnt); | |
2342 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2343 | spin_unlock_bh(&ma->mca_lock); | |
2344 | } | |
2345 | ||
2346 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2347 | struct inet6_dev *idev) | |
2348 | { | |
2349 | int err; | |
2350 | ||
f7ed925c | 2351 | /* callers have the socket lock and rtnl lock |
5ab4a6c8 DS |
2352 | * so no other readers or writers of iml or its sflist |
2353 | */ | |
cfcabdcc | 2354 | if (!iml->sflist) { |
1da177e4 LT |
2355 | /* any-source empty exclude case */ |
2356 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2357 | } | |
2358 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2359 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2360 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2361 | iml->sflist = NULL; | |
2362 | return err; | |
2363 | } | |
2364 | ||
2365 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2366 | { | |
6c567b78 | 2367 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2368 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2369 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2370 | ICMPV6_MGM_REDUCTION); | |
2371 | } else { | |
2372 | mld_add_delrec(ma->idev, ma); | |
2373 | mld_ifc_event(ma->idev); | |
2374 | } | |
2375 | } | |
2376 | ||
2377 | static void mld_gq_timer_expire(unsigned long data) | |
2378 | { | |
2379 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2380 | ||
2381 | idev->mc_gq_running = 0; | |
2382 | mld_send_report(idev, NULL); | |
9260d3e1 | 2383 | in6_dev_put(idev); |
1da177e4 LT |
2384 | } |
2385 | ||
2386 | static void mld_ifc_timer_expire(unsigned long data) | |
2387 | { | |
2388 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2389 | ||
2390 | mld_send_cr(idev); | |
2391 | if (idev->mc_ifc_count) { | |
2392 | idev->mc_ifc_count--; | |
2393 | if (idev->mc_ifc_count) | |
2394 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2395 | } | |
9260d3e1 | 2396 | in6_dev_put(idev); |
1da177e4 LT |
2397 | } |
2398 | ||
2399 | static void mld_ifc_event(struct inet6_dev *idev) | |
2400 | { | |
6c567b78 | 2401 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2402 | return; |
2403 | idev->mc_ifc_count = idev->mc_qrv; | |
2404 | mld_ifc_start_timer(idev, 1); | |
2405 | } | |
2406 | ||
2407 | ||
2408 | static void igmp6_timer_handler(unsigned long data) | |
2409 | { | |
2410 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2411 | ||
6c567b78 | 2412 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2413 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2414 | else | |
2415 | mld_send_report(ma->idev, ma); | |
2416 | ||
2417 | spin_lock(&ma->mca_lock); | |
2418 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2419 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2420 | spin_unlock(&ma->mca_lock); | |
2421 | ma_put(ma); | |
2422 | } | |
2423 | ||
75c78500 MS |
2424 | /* Device changing type */ |
2425 | ||
2426 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2427 | { | |
2428 | struct ifmcaddr6 *i; | |
2429 | ||
2430 | /* Install multicast list, except for all-nodes (already installed) */ | |
2431 | ||
2432 | read_lock_bh(&idev->lock); | |
2433 | for (i = idev->mc_list; i; i = i->next) | |
2434 | igmp6_group_dropped(i); | |
2435 | read_unlock_bh(&idev->lock); | |
2436 | } | |
2437 | ||
2438 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2439 | { | |
2440 | ipv6_mc_up(idev); | |
2441 | } | |
2442 | ||
1da177e4 LT |
2443 | /* Device going down */ |
2444 | ||
2445 | void ipv6_mc_down(struct inet6_dev *idev) | |
2446 | { | |
2447 | struct ifmcaddr6 *i; | |
2448 | ||
2449 | /* Withdraw multicast list */ | |
2450 | ||
2451 | read_lock_bh(&idev->lock); | |
b4af8def DB |
2452 | mld_ifc_stop_timer(idev); |
2453 | mld_gq_stop_timer(idev); | |
2454 | mld_dad_stop_timer(idev); | |
1da177e4 | 2455 | |
67ba4152 | 2456 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2457 | igmp6_group_dropped(i); |
2458 | read_unlock_bh(&idev->lock); | |
2459 | ||
2460 | mld_clear_delrec(idev); | |
2461 | } | |
2462 | ||
2f711939 HFS |
2463 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2464 | { | |
2465 | idev->mc_qrv = sysctl_mld_qrv; | |
2466 | idev->mc_qi = MLD_QI_DEFAULT; | |
2467 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2468 | idev->mc_v1_seen = 0; | |
2469 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2470 | } | |
1da177e4 LT |
2471 | |
2472 | /* Device going up */ | |
2473 | ||
2474 | void ipv6_mc_up(struct inet6_dev *idev) | |
2475 | { | |
2476 | struct ifmcaddr6 *i; | |
2477 | ||
2478 | /* Install multicast list, except for all-nodes (already installed) */ | |
2479 | ||
2480 | read_lock_bh(&idev->lock); | |
2f711939 | 2481 | ipv6_mc_reset(idev); |
67ba4152 | 2482 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2483 | igmp6_group_added(i); |
2484 | read_unlock_bh(&idev->lock); | |
2485 | } | |
2486 | ||
2487 | /* IPv6 device initialization. */ | |
2488 | ||
2489 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2490 | { | |
1da177e4 | 2491 | write_lock_bh(&idev->lock); |
6457d26b | 2492 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2493 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2494 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2495 | (unsigned long)idev); | |
1da177e4 LT |
2496 | idev->mc_tomb = NULL; |
2497 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2498 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2499 | (unsigned long)idev); | |
b173ee48 HFS |
2500 | setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire, |
2501 | (unsigned long)idev); | |
2f711939 | 2502 | ipv6_mc_reset(idev); |
1da177e4 | 2503 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2504 | } |
2505 | ||
2506 | /* | |
2507 | * Device is about to be destroyed: clean up. | |
2508 | */ | |
2509 | ||
2510 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2511 | { | |
2512 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2513 | |
2514 | /* Deactivate timers */ | |
2515 | ipv6_mc_down(idev); | |
2516 | ||
2517 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2518 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2519 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2520 | * fail. | |
2521 | */ | |
f3ee4010 | 2522 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2523 | |
f3ee4010 YH |
2524 | if (idev->cnf.forwarding) |
2525 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2526 | |
2527 | write_lock_bh(&idev->lock); | |
2528 | while ((i = idev->mc_list) != NULL) { | |
2529 | idev->mc_list = i->next; | |
2530 | write_unlock_bh(&idev->lock); | |
2531 | ||
2532 | igmp6_group_dropped(i); | |
2533 | ma_put(i); | |
2534 | ||
2535 | write_lock_bh(&idev->lock); | |
2536 | } | |
2537 | write_unlock_bh(&idev->lock); | |
2538 | } | |
2539 | ||
2540 | #ifdef CONFIG_PROC_FS | |
2541 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2542 | struct seq_net_private p; |
1da177e4 LT |
2543 | struct net_device *dev; |
2544 | struct inet6_dev *idev; | |
2545 | }; | |
2546 | ||
2547 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2548 | ||
2549 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2550 | { | |
2551 | struct ifmcaddr6 *im = NULL; | |
2552 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2553 | struct net *net = seq_file_net(seq); |
1da177e4 | 2554 | |
7562f876 | 2555 | state->idev = NULL; |
ce81b76a | 2556 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2557 | struct inet6_dev *idev; |
ce81b76a | 2558 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2559 | if (!idev) |
2560 | continue; | |
2561 | read_lock_bh(&idev->lock); | |
2562 | im = idev->mc_list; | |
2563 | if (im) { | |
2564 | state->idev = idev; | |
2565 | break; | |
2566 | } | |
2567 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2568 | } |
2569 | return im; | |
2570 | } | |
2571 | ||
2572 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2573 | { | |
2574 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2575 | ||
2576 | im = im->next; | |
2577 | while (!im) { | |
ce81b76a | 2578 | if (likely(state->idev != NULL)) |
1da177e4 | 2579 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2580 | |
2581 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2582 | if (!state->dev) { |
2583 | state->idev = NULL; | |
2584 | break; | |
2585 | } | |
ce81b76a | 2586 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2587 | if (!state->idev) |
2588 | continue; | |
2589 | read_lock_bh(&state->idev->lock); | |
2590 | im = state->idev->mc_list; | |
2591 | } | |
2592 | return im; | |
2593 | } | |
2594 | ||
2595 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2596 | { | |
2597 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2598 | if (im) | |
2599 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2600 | --pos; | |
2601 | return pos ? NULL : im; | |
2602 | } | |
2603 | ||
2604 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2605 | __acquires(RCU) |
1da177e4 | 2606 | { |
ce81b76a | 2607 | rcu_read_lock(); |
1da177e4 LT |
2608 | return igmp6_mc_get_idx(seq, *pos); |
2609 | } | |
2610 | ||
2611 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2612 | { | |
ce81b76a ED |
2613 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2614 | ||
1da177e4 LT |
2615 | ++*pos; |
2616 | return im; | |
2617 | } | |
2618 | ||
2619 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2620 | __releases(RCU) |
1da177e4 LT |
2621 | { |
2622 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2623 | |
1da177e4 LT |
2624 | if (likely(state->idev != NULL)) { |
2625 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2626 | state->idev = NULL; |
2627 | } | |
2628 | state->dev = NULL; | |
ce81b76a | 2629 | rcu_read_unlock(); |
1da177e4 LT |
2630 | } |
2631 | ||
2632 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2633 | { | |
2634 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2635 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2636 | ||
2637 | seq_printf(seq, | |
4b7a4274 | 2638 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2639 | state->dev->ifindex, state->dev->name, |
b071195d | 2640 | &im->mca_addr, |
1da177e4 LT |
2641 | im->mca_users, im->mca_flags, |
2642 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2643 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2644 | return 0; | |
2645 | } | |
2646 | ||
56b3d975 | 2647 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2648 | .start = igmp6_mc_seq_start, |
2649 | .next = igmp6_mc_seq_next, | |
2650 | .stop = igmp6_mc_seq_stop, | |
2651 | .show = igmp6_mc_seq_show, | |
2652 | }; | |
2653 | ||
2654 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2655 | { | |
b8ad0cbc DL |
2656 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2657 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2658 | } |
2659 | ||
9a32144e | 2660 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2661 | .owner = THIS_MODULE, |
2662 | .open = igmp6_mc_seq_open, | |
2663 | .read = seq_read, | |
2664 | .llseek = seq_lseek, | |
b8ad0cbc | 2665 | .release = seq_release_net, |
1da177e4 LT |
2666 | }; |
2667 | ||
2668 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2669 | struct seq_net_private p; |
1da177e4 LT |
2670 | struct net_device *dev; |
2671 | struct inet6_dev *idev; | |
2672 | struct ifmcaddr6 *im; | |
2673 | }; | |
2674 | ||
2675 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2676 | ||
2677 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2678 | { | |
2679 | struct ip6_sf_list *psf = NULL; | |
2680 | struct ifmcaddr6 *im = NULL; | |
2681 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2682 | struct net *net = seq_file_net(seq); |
1da177e4 | 2683 | |
7562f876 PE |
2684 | state->idev = NULL; |
2685 | state->im = NULL; | |
ce81b76a | 2686 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2687 | struct inet6_dev *idev; |
ce81b76a | 2688 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2689 | if (unlikely(idev == NULL)) |
2690 | continue; | |
2691 | read_lock_bh(&idev->lock); | |
2692 | im = idev->mc_list; | |
2693 | if (likely(im != NULL)) { | |
2694 | spin_lock_bh(&im->mca_lock); | |
2695 | psf = im->mca_sources; | |
2696 | if (likely(psf != NULL)) { | |
2697 | state->im = im; | |
2698 | state->idev = idev; | |
2699 | break; | |
2700 | } | |
2701 | spin_unlock_bh(&im->mca_lock); | |
2702 | } | |
2703 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2704 | } |
2705 | return psf; | |
2706 | } | |
2707 | ||
2708 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2709 | { | |
2710 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2711 | ||
2712 | psf = psf->sf_next; | |
2713 | while (!psf) { | |
2714 | spin_unlock_bh(&state->im->mca_lock); | |
2715 | state->im = state->im->next; | |
2716 | while (!state->im) { | |
ce81b76a | 2717 | if (likely(state->idev != NULL)) |
1da177e4 | 2718 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2719 | |
2720 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2721 | if (!state->dev) { |
2722 | state->idev = NULL; | |
2723 | goto out; | |
2724 | } | |
ce81b76a | 2725 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2726 | if (!state->idev) |
2727 | continue; | |
2728 | read_lock_bh(&state->idev->lock); | |
2729 | state->im = state->idev->mc_list; | |
2730 | } | |
2731 | if (!state->im) | |
2732 | break; | |
2733 | spin_lock_bh(&state->im->mca_lock); | |
2734 | psf = state->im->mca_sources; | |
2735 | } | |
2736 | out: | |
2737 | return psf; | |
2738 | } | |
2739 | ||
2740 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2741 | { | |
2742 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2743 | if (psf) | |
2744 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2745 | --pos; | |
2746 | return pos ? NULL : psf; | |
2747 | } | |
2748 | ||
2749 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2750 | __acquires(RCU) |
1da177e4 | 2751 | { |
ce81b76a | 2752 | rcu_read_lock(); |
1da177e4 LT |
2753 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2754 | } | |
2755 | ||
2756 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2757 | { | |
2758 | struct ip6_sf_list *psf; | |
2759 | if (v == SEQ_START_TOKEN) | |
2760 | psf = igmp6_mcf_get_first(seq); | |
2761 | else | |
2762 | psf = igmp6_mcf_get_next(seq, v); | |
2763 | ++*pos; | |
2764 | return psf; | |
2765 | } | |
2766 | ||
2767 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2768 | __releases(RCU) |
1da177e4 LT |
2769 | { |
2770 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2771 | if (likely(state->im != NULL)) { | |
2772 | spin_unlock_bh(&state->im->mca_lock); | |
2773 | state->im = NULL; | |
2774 | } | |
2775 | if (likely(state->idev != NULL)) { | |
2776 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2777 | state->idev = NULL; |
2778 | } | |
2779 | state->dev = NULL; | |
ce81b76a | 2780 | rcu_read_unlock(); |
1da177e4 LT |
2781 | } |
2782 | ||
2783 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2784 | { | |
2785 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2786 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2787 | ||
2788 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2789 | seq_printf(seq, |
1da177e4 | 2790 | "%3s %6s " |
9343e79a | 2791 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2792 | "Device", "Multicast Address", |
2793 | "Source Address", "INC", "EXC"); | |
2794 | } else { | |
2795 | seq_printf(seq, | |
4b7a4274 | 2796 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2797 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2798 | &state->im->mca_addr, |
2799 | &psf->sf_addr, | |
1da177e4 LT |
2800 | psf->sf_count[MCAST_INCLUDE], |
2801 | psf->sf_count[MCAST_EXCLUDE]); | |
2802 | } | |
2803 | return 0; | |
2804 | } | |
2805 | ||
56b3d975 | 2806 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2807 | .start = igmp6_mcf_seq_start, |
2808 | .next = igmp6_mcf_seq_next, | |
2809 | .stop = igmp6_mcf_seq_stop, | |
2810 | .show = igmp6_mcf_seq_show, | |
2811 | }; | |
2812 | ||
2813 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2814 | { | |
b8ad0cbc DL |
2815 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2816 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2817 | } |
2818 | ||
9a32144e | 2819 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2820 | .owner = THIS_MODULE, |
2821 | .open = igmp6_mcf_seq_open, | |
2822 | .read = seq_read, | |
2823 | .llseek = seq_lseek, | |
b8ad0cbc | 2824 | .release = seq_release_net, |
1da177e4 | 2825 | }; |
ea82edf7 | 2826 | |
2c8c1e72 | 2827 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2828 | { |
2829 | int err; | |
2830 | ||
2831 | err = -ENOMEM; | |
d4beaa66 | 2832 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2833 | goto out; |
d4beaa66 G |
2834 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2835 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2836 | goto out_proc_net_igmp6; |
2837 | ||
2838 | err = 0; | |
2839 | out: | |
2840 | return err; | |
2841 | ||
2842 | out_proc_net_igmp6: | |
ece31ffd | 2843 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2844 | goto out; |
2845 | } | |
2846 | ||
2c8c1e72 | 2847 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2848 | { |
ece31ffd G |
2849 | remove_proc_entry("mcfilter6", net->proc_net); |
2850 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2851 | } |
2852 | #else | |
2c8c1e72 | 2853 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2854 | { |
2855 | return 0; | |
2856 | } | |
2c8c1e72 | 2857 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2858 | { |
ea82edf7 | 2859 | } |
1da177e4 LT |
2860 | #endif |
2861 | ||
2c8c1e72 | 2862 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2863 | { |
1da177e4 LT |
2864 | int err; |
2865 | ||
1ed8516f DL |
2866 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2867 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2868 | if (err < 0) { |
f3213831 | 2869 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2870 | err); |
b8ad0cbc | 2871 | goto out; |
1da177e4 LT |
2872 | } |
2873 | ||
1ed8516f | 2874 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2875 | |
ea82edf7 DL |
2876 | err = igmp6_proc_init(net); |
2877 | if (err) | |
b8ad0cbc | 2878 | goto out_sock_create; |
b8ad0cbc DL |
2879 | out: |
2880 | return err; | |
2881 | ||
2882 | out_sock_create: | |
1ed8516f | 2883 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
b8ad0cbc | 2884 | goto out; |
1da177e4 LT |
2885 | } |
2886 | ||
2c8c1e72 | 2887 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2888 | { |
1ed8516f | 2889 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
ea82edf7 | 2890 | igmp6_proc_exit(net); |
1da177e4 | 2891 | } |
b8ad0cbc DL |
2892 | |
2893 | static struct pernet_operations igmp6_net_ops = { | |
2894 | .init = igmp6_net_init, | |
2895 | .exit = igmp6_net_exit, | |
2896 | }; | |
2897 | ||
2898 | int __init igmp6_init(void) | |
2899 | { | |
2900 | return register_pernet_subsys(&igmp6_net_ops); | |
2901 | } | |
2902 | ||
2903 | void igmp6_cleanup(void) | |
2904 | { | |
2905 | unregister_pernet_subsys(&igmp6_net_ops); | |
2906 | } |