]>
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); | |
e99e88a9 | 78 | static void igmp6_timer_handler(struct timer_list *t); |
1da177e4 | 79 | |
e99e88a9 KC |
80 | static void mld_gq_timer_expire(struct timer_list *t); |
81 | static void mld_ifc_timer_expire(struct timer_list *t); | |
1da177e4 LT |
82 | static void mld_ifc_event(struct inet6_dev *idev); |
83 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
1666d49e | 84 | static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); |
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 | ||
54ff9ef3 | 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 | ||
46a4dee0 MC |
143 | ASSERT_RTNL(); |
144 | ||
1da177e4 LT |
145 | if (!ipv6_addr_is_multicast(addr)) |
146 | return -EINVAL; | |
147 | ||
456b61bc ED |
148 | rcu_read_lock(); |
149 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
150 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
151 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 152 | rcu_read_unlock(); |
c9e3e8b6 DS |
153 | return -EADDRINUSE; |
154 | } | |
155 | } | |
456b61bc | 156 | rcu_read_unlock(); |
c9e3e8b6 | 157 | |
1da177e4 LT |
158 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
159 | ||
63159f29 | 160 | if (!mc_lst) |
1da177e4 LT |
161 | return -ENOMEM; |
162 | ||
163 | mc_lst->next = NULL; | |
4e3fd7a0 | 164 | mc_lst->addr = *addr; |
1da177e4 LT |
165 | |
166 | if (ifindex == 0) { | |
167 | struct rt6_info *rt; | |
b8ad0cbc | 168 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 | 169 | if (rt) { |
d1918542 | 170 | dev = rt->dst.dev; |
94e187c0 | 171 | ip6_rt_put(rt); |
1da177e4 LT |
172 | } |
173 | } else | |
414b6c94 | 174 | dev = __dev_get_by_index(net, ifindex); |
1da177e4 | 175 | |
63159f29 | 176 | if (!dev) { |
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) { | |
193 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
1da177e4 LT |
194 | return err; |
195 | } | |
196 | ||
1da177e4 | 197 | mc_lst->next = np->ipv6_mc_list; |
456b61bc | 198 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
1da177e4 | 199 | |
46a4dee0 MC |
200 | return 0; |
201 | } | |
46a4dee0 | 202 | EXPORT_SYMBOL(ipv6_sock_mc_join); |
1da177e4 LT |
203 | |
204 | /* | |
205 | * socket leave on multicast group | |
206 | */ | |
54ff9ef3 | 207 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
208 | { |
209 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
210 | struct ipv6_mc_socklist *mc_lst; |
211 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 212 | struct net *net = sock_net(sk); |
1da177e4 | 213 | |
46a4dee0 MC |
214 | ASSERT_RTNL(); |
215 | ||
a858d64b LW |
216 | if (!ipv6_addr_is_multicast(addr)) |
217 | return -EINVAL; | |
218 | ||
456b61bc | 219 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 220 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 221 | lnk = &mc_lst->next) { |
1da177e4 LT |
222 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
223 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
224 | struct net_device *dev; | |
225 | ||
226 | *lnk = mc_lst->next; | |
1da177e4 | 227 | |
414b6c94 | 228 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
53b24b8f | 229 | if (dev) { |
96b52e61 | 230 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 231 | |
acd6e00b | 232 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 233 | if (idev) |
1da177e4 | 234 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
235 | } else |
236 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 | 237 | |
456b61bc | 238 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 239 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
240 | return 0; |
241 | } | |
242 | } | |
1da177e4 | 243 | |
9951f036 | 244 | return -EADDRNOTAVAIL; |
1da177e4 | 245 | } |
46a4dee0 | 246 | EXPORT_SYMBOL(ipv6_sock_mc_drop); |
1da177e4 | 247 | |
96b52e61 ED |
248 | /* called with rcu_read_lock() */ |
249 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 250 | const struct in6_addr *group, |
96b52e61 | 251 | int ifindex) |
1da177e4 LT |
252 | { |
253 | struct net_device *dev = NULL; | |
254 | struct inet6_dev *idev = NULL; | |
255 | ||
256 | if (ifindex == 0) { | |
96b52e61 | 257 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 258 | |
1da177e4 | 259 | if (rt) { |
d1918542 | 260 | dev = rt->dst.dev; |
94e187c0 | 261 | ip6_rt_put(rt); |
1da177e4 LT |
262 | } |
263 | } else | |
96b52e61 | 264 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
265 | |
266 | if (!dev) | |
96b52e61 ED |
267 | return NULL; |
268 | idev = __in6_dev_get(dev); | |
448eb71f | 269 | if (!idev) |
8a22c99a | 270 | return NULL; |
1da177e4 | 271 | read_lock_bh(&idev->lock); |
96b52e61 ED |
272 | if (idev->dead) { |
273 | read_unlock_bh(&idev->lock); | |
274 | return NULL; | |
275 | } | |
1da177e4 LT |
276 | return idev; |
277 | } | |
278 | ||
8651be8f | 279 | void __ipv6_sock_mc_close(struct sock *sk) |
1da177e4 LT |
280 | { |
281 | struct ipv6_pinfo *np = inet6_sk(sk); | |
282 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 283 | struct net *net = sock_net(sk); |
1da177e4 | 284 | |
8651be8f | 285 | ASSERT_RTNL(); |
0e1efe9d | 286 | |
b5350916 | 287 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
288 | struct net_device *dev; |
289 | ||
290 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 291 | |
414b6c94 | 292 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 293 | if (dev) { |
96b52e61 | 294 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 295 | |
acd6e00b | 296 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 297 | if (idev) |
1da177e4 | 298 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
299 | } else |
300 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 301 | |
456b61bc | 302 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 303 | kfree_rcu(mc_lst, rcu); |
1da177e4 | 304 | } |
8651be8f WC |
305 | } |
306 | ||
307 | void ipv6_sock_mc_close(struct sock *sk) | |
308 | { | |
309 | struct ipv6_pinfo *np = inet6_sk(sk); | |
310 | ||
311 | if (!rcu_access_pointer(np->ipv6_mc_list)) | |
312 | return; | |
313 | rtnl_lock(); | |
314 | __ipv6_sock_mc_close(sk); | |
a9ed4a29 | 315 | rtnl_unlock(); |
1da177e4 LT |
316 | } |
317 | ||
318 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
319 | struct group_source_req *pgsr) | |
320 | { | |
321 | struct in6_addr *source, *group; | |
322 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
323 | struct inet6_dev *idev; |
324 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
325 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 326 | struct net *net = sock_net(sk); |
1da177e4 | 327 | int i, j, rv; |
c9e3e8b6 | 328 | int leavegroup = 0; |
5ab4a6c8 | 329 | int pmclocked = 0; |
1da177e4 LT |
330 | int err; |
331 | ||
1da177e4 LT |
332 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
333 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
334 | ||
335 | if (!ipv6_addr_is_multicast(group)) | |
336 | return -EINVAL; | |
337 | ||
96b52e61 ED |
338 | rcu_read_lock(); |
339 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
340 | if (!idev) { | |
341 | rcu_read_unlock(); | |
1da177e4 | 342 | return -ENODEV; |
96b52e61 | 343 | } |
1da177e4 LT |
344 | |
345 | err = -EADDRNOTAVAIL; | |
346 | ||
456b61bc | 347 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
348 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
349 | continue; | |
350 | if (ipv6_addr_equal(&pmc->addr, group)) | |
351 | break; | |
352 | } | |
917f2f10 DS |
353 | if (!pmc) { /* must have a prior join */ |
354 | err = -EINVAL; | |
1da177e4 | 355 | goto done; |
917f2f10 | 356 | } |
1da177e4 LT |
357 | /* if a source filter was set, must be the same mode as before */ |
358 | if (pmc->sflist) { | |
917f2f10 DS |
359 | if (pmc->sfmode != omode) { |
360 | err = -EINVAL; | |
1da177e4 | 361 | goto done; |
917f2f10 | 362 | } |
1da177e4 LT |
363 | } else if (pmc->sfmode != omode) { |
364 | /* allow mode switches for empty-set filters */ | |
365 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
366 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
367 | pmc->sfmode = omode; | |
368 | } | |
369 | ||
96b52e61 | 370 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
371 | pmclocked = 1; |
372 | ||
1da177e4 LT |
373 | psl = pmc->sflist; |
374 | if (!add) { | |
375 | if (!psl) | |
917f2f10 | 376 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 377 | rv = !0; |
67ba4152 | 378 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 379 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
380 | if (rv == 0) |
381 | break; | |
382 | } | |
383 | if (rv) /* source not found */ | |
917f2f10 | 384 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 385 | |
c9e3e8b6 DS |
386 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
387 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
388 | leavegroup = 1; | |
389 | goto done; | |
390 | } | |
391 | ||
1da177e4 LT |
392 | /* update the interface filter */ |
393 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
394 | ||
67ba4152 | 395 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
396 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
397 | psl->sl_count--; | |
398 | err = 0; | |
399 | goto done; | |
400 | } | |
401 | /* else, add a new source to the filter */ | |
402 | ||
403 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
404 | err = -ENOBUFS; | |
405 | goto done; | |
406 | } | |
407 | if (!psl || psl->sl_count == psl->sl_max) { | |
408 | struct ip6_sf_socklist *newpsl; | |
409 | int count = IP6_SFBLOCK; | |
410 | ||
411 | if (psl) | |
412 | count += psl->sl_max; | |
8b3a7005 | 413 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
414 | if (!newpsl) { |
415 | err = -ENOBUFS; | |
416 | goto done; | |
417 | } | |
418 | newpsl->sl_max = count; | |
419 | newpsl->sl_count = count - IP6_SFBLOCK; | |
420 | if (psl) { | |
67ba4152 | 421 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
422 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
423 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
424 | } | |
425 | pmc->sflist = psl = newpsl; | |
426 | } | |
427 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 428 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 429 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
430 | if (rv == 0) /* There is an error in the address. */ |
431 | goto done; | |
1da177e4 | 432 | } |
67ba4152 | 433 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
434 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
435 | psl->sl_addr[i] = *source; | |
436 | psl->sl_count++; | |
437 | err = 0; | |
438 | /* update the interface list */ | |
439 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
440 | done: | |
5ab4a6c8 | 441 | if (pmclocked) |
96b52e61 | 442 | write_unlock(&pmc->sflock); |
1da177e4 | 443 | read_unlock_bh(&idev->lock); |
96b52e61 | 444 | rcu_read_unlock(); |
c9e3e8b6 | 445 | if (leavegroup) |
54ff9ef3 | 446 | err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); |
1da177e4 LT |
447 | return err; |
448 | } | |
449 | ||
450 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
451 | { | |
b71d1d42 | 452 | const struct in6_addr *group; |
1da177e4 | 453 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
454 | struct inet6_dev *idev; |
455 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
456 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 457 | struct net *net = sock_net(sk); |
9951f036 | 458 | int leavegroup = 0; |
1da177e4 LT |
459 | int i, err; |
460 | ||
461 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
462 | ||
463 | if (!ipv6_addr_is_multicast(group)) | |
464 | return -EINVAL; | |
465 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
466 | gsf->gf_fmode != MCAST_EXCLUDE) | |
467 | return -EINVAL; | |
468 | ||
96b52e61 ED |
469 | rcu_read_lock(); |
470 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 471 | |
96b52e61 ED |
472 | if (!idev) { |
473 | rcu_read_unlock(); | |
1da177e4 | 474 | return -ENODEV; |
96b52e61 | 475 | } |
1da177e4 | 476 | |
9c05989b | 477 | err = 0; |
5ab4a6c8 | 478 | |
9951f036 DS |
479 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
480 | leavegroup = 1; | |
481 | goto done; | |
482 | } | |
483 | ||
456b61bc | 484 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
485 | if (pmc->ifindex != gsf->gf_interface) |
486 | continue; | |
487 | if (ipv6_addr_equal(&pmc->addr, group)) | |
488 | break; | |
489 | } | |
917f2f10 DS |
490 | if (!pmc) { /* must have a prior join */ |
491 | err = -EINVAL; | |
1da177e4 | 492 | goto done; |
917f2f10 | 493 | } |
1da177e4 | 494 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
495 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
496 | GFP_ATOMIC); | |
1da177e4 LT |
497 | if (!newpsl) { |
498 | err = -ENOBUFS; | |
499 | goto done; | |
500 | } | |
501 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 502 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
503 | struct sockaddr_in6 *psin6; |
504 | ||
505 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
506 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
507 | } | |
508 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
509 | newpsl->sl_count, newpsl->sl_addr, 0); | |
510 | if (err) { | |
511 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
512 | goto done; | |
513 | } | |
8713dbf0 | 514 | } else { |
1da177e4 | 515 | newpsl = NULL; |
8713dbf0 YZ |
516 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
517 | } | |
5ab4a6c8 | 518 | |
96b52e61 | 519 | write_lock(&pmc->sflock); |
1da177e4 LT |
520 | psl = pmc->sflist; |
521 | if (psl) { | |
522 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
523 | psl->sl_count, psl->sl_addr, 0); | |
524 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
525 | } else | |
526 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
527 | pmc->sflist = newpsl; | |
528 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 529 | write_unlock(&pmc->sflock); |
917f2f10 | 530 | err = 0; |
1da177e4 LT |
531 | done: |
532 | read_unlock_bh(&idev->lock); | |
96b52e61 | 533 | rcu_read_unlock(); |
9951f036 DS |
534 | if (leavegroup) |
535 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
536 | return err; |
537 | } | |
538 | ||
539 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
540 | struct group_filter __user *optval, int __user *optlen) | |
541 | { | |
542 | int err, i, count, copycount; | |
b71d1d42 | 543 | const struct in6_addr *group; |
1da177e4 LT |
544 | struct ipv6_mc_socklist *pmc; |
545 | struct inet6_dev *idev; | |
1da177e4 LT |
546 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
547 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 548 | struct net *net = sock_net(sk); |
1da177e4 LT |
549 | |
550 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
551 | ||
552 | if (!ipv6_addr_is_multicast(group)) | |
553 | return -EINVAL; | |
554 | ||
96b52e61 ED |
555 | rcu_read_lock(); |
556 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 557 | |
96b52e61 ED |
558 | if (!idev) { |
559 | rcu_read_unlock(); | |
1da177e4 | 560 | return -ENODEV; |
96b52e61 | 561 | } |
1da177e4 LT |
562 | |
563 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
564 | /* changes to the ipv6_mc_list require the socket lock and |
565 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
566 | * so reading the list is safe. |
567 | */ | |
1da177e4 | 568 | |
456b61bc | 569 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
570 | if (pmc->ifindex != gsf->gf_interface) |
571 | continue; | |
572 | if (ipv6_addr_equal(group, &pmc->addr)) | |
573 | break; | |
574 | } | |
575 | if (!pmc) /* must have a prior join */ | |
576 | goto done; | |
577 | gsf->gf_fmode = pmc->sfmode; | |
578 | psl = pmc->sflist; | |
579 | count = psl ? psl->sl_count : 0; | |
580 | read_unlock_bh(&idev->lock); | |
96b52e61 | 581 | rcu_read_unlock(); |
1da177e4 LT |
582 | |
583 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
584 | gsf->gf_numsrc = count; | |
585 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
586 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
587 | return -EFAULT; | |
588 | } | |
f7ed925c WC |
589 | /* changes to psl require the socket lock, and a write lock |
590 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 591 | */ |
67ba4152 | 592 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
593 | struct sockaddr_in6 *psin6; |
594 | struct sockaddr_storage ss; | |
595 | ||
596 | psin6 = (struct sockaddr_in6 *)&ss; | |
597 | memset(&ss, 0, sizeof(ss)); | |
598 | psin6->sin6_family = AF_INET6; | |
599 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 600 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
601 | return -EFAULT; |
602 | } | |
603 | return 0; | |
604 | done: | |
605 | read_unlock_bh(&idev->lock); | |
96b52e61 | 606 | rcu_read_unlock(); |
1da177e4 LT |
607 | return err; |
608 | } | |
609 | ||
a50feda5 ED |
610 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
611 | const struct in6_addr *src_addr) | |
1da177e4 LT |
612 | { |
613 | struct ipv6_pinfo *np = inet6_sk(sk); | |
614 | struct ipv6_mc_socklist *mc; | |
615 | struct ip6_sf_socklist *psl; | |
a50feda5 | 616 | bool rv = true; |
1da177e4 | 617 | |
456b61bc ED |
618 | rcu_read_lock(); |
619 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
620 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
621 | break; | |
622 | } | |
623 | if (!mc) { | |
456b61bc | 624 | rcu_read_unlock(); |
a50feda5 | 625 | return true; |
1da177e4 | 626 | } |
5ab4a6c8 | 627 | read_lock(&mc->sflock); |
1da177e4 LT |
628 | psl = mc->sflist; |
629 | if (!psl) { | |
630 | rv = mc->sfmode == MCAST_EXCLUDE; | |
631 | } else { | |
632 | int i; | |
633 | ||
67ba4152 | 634 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
635 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
636 | break; | |
637 | } | |
638 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 639 | rv = false; |
1da177e4 | 640 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 641 | rv = false; |
1da177e4 | 642 | } |
5ab4a6c8 | 643 | read_unlock(&mc->sflock); |
456b61bc | 644 | rcu_read_unlock(); |
1da177e4 LT |
645 | |
646 | return rv; | |
647 | } | |
648 | ||
1da177e4 LT |
649 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
650 | { | |
651 | struct net_device *dev = mc->idev->dev; | |
652 | char buf[MAX_ADDR_LEN]; | |
653 | ||
ec16ef22 YH |
654 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
655 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
656 | return; | |
657 | ||
1da177e4 LT |
658 | spin_lock_bh(&mc->mca_lock); |
659 | if (!(mc->mca_flags&MAF_LOADED)) { | |
660 | mc->mca_flags |= MAF_LOADED; | |
661 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 662 | dev_mc_add(dev, buf); |
1da177e4 LT |
663 | } |
664 | spin_unlock_bh(&mc->mca_lock); | |
665 | ||
666 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
667 | return; | |
668 | ||
6c567b78 | 669 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
670 | igmp6_join_group(mc); |
671 | return; | |
672 | } | |
673 | /* else v2 */ | |
674 | ||
675 | mc->mca_crcount = mc->idev->mc_qrv; | |
676 | mld_ifc_event(mc->idev); | |
677 | } | |
678 | ||
679 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
680 | { | |
681 | struct net_device *dev = mc->idev->dev; | |
682 | char buf[MAX_ADDR_LEN]; | |
683 | ||
ec16ef22 YH |
684 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
685 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
686 | return; | |
687 | ||
1da177e4 LT |
688 | spin_lock_bh(&mc->mca_lock); |
689 | if (mc->mca_flags&MAF_LOADED) { | |
690 | mc->mca_flags &= ~MAF_LOADED; | |
691 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 692 | dev_mc_del(dev, buf); |
1da177e4 LT |
693 | } |
694 | ||
1da177e4 | 695 | spin_unlock_bh(&mc->mca_lock); |
1666d49e HL |
696 | if (mc->mca_flags & MAF_NOREPORT) |
697 | return; | |
1da177e4 LT |
698 | |
699 | if (!mc->idev->dead) | |
700 | igmp6_leave_group(mc); | |
701 | ||
702 | spin_lock_bh(&mc->mca_lock); | |
703 | if (del_timer(&mc->mca_timer)) | |
d3981bc6 | 704 | refcount_dec(&mc->mca_refcnt); |
1da177e4 LT |
705 | spin_unlock_bh(&mc->mca_lock); |
706 | } | |
707 | ||
708 | /* | |
709 | * deleted ifmcaddr6 manipulation | |
710 | */ | |
711 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
712 | { | |
713 | struct ifmcaddr6 *pmc; | |
714 | ||
715 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
716 | * are actually used. In particular, the refcnt and users are not | |
717 | * used for management of the delete list. Using the same structure | |
718 | * for deleted items allows change reports to use common code with | |
719 | * non-deleted or query-response MCA's. | |
720 | */ | |
0c600eda | 721 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
722 | if (!pmc) |
723 | return; | |
0c600eda | 724 | |
1da177e4 LT |
725 | spin_lock_bh(&im->mca_lock); |
726 | spin_lock_init(&pmc->mca_lock); | |
727 | pmc->idev = im->idev; | |
728 | in6_dev_hold(idev); | |
729 | pmc->mca_addr = im->mca_addr; | |
730 | pmc->mca_crcount = idev->mc_qrv; | |
731 | pmc->mca_sfmode = im->mca_sfmode; | |
732 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
733 | struct ip6_sf_list *psf; | |
734 | ||
735 | pmc->mca_tomb = im->mca_tomb; | |
736 | pmc->mca_sources = im->mca_sources; | |
737 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 738 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
739 | psf->sf_crcount = pmc->mca_crcount; |
740 | } | |
741 | spin_unlock_bh(&im->mca_lock); | |
742 | ||
6457d26b | 743 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
744 | pmc->next = idev->mc_tomb; |
745 | idev->mc_tomb = pmc; | |
6457d26b | 746 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
747 | } |
748 | ||
1666d49e | 749 | static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) |
1da177e4 LT |
750 | { |
751 | struct ifmcaddr6 *pmc, *pmc_prev; | |
1666d49e HL |
752 | struct ip6_sf_list *psf; |
753 | struct in6_addr *pmca = &im->mca_addr; | |
1da177e4 | 754 | |
6457d26b | 755 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 756 | pmc_prev = NULL; |
67ba4152 | 757 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
758 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
759 | break; | |
760 | pmc_prev = pmc; | |
761 | } | |
762 | if (pmc) { | |
763 | if (pmc_prev) | |
764 | pmc_prev->next = pmc->next; | |
765 | else | |
766 | idev->mc_tomb = pmc->next; | |
767 | } | |
6457d26b SH |
768 | spin_unlock_bh(&idev->mc_lock); |
769 | ||
1666d49e | 770 | spin_lock_bh(&im->mca_lock); |
1da177e4 | 771 | if (pmc) { |
1666d49e HL |
772 | im->idev = pmc->idev; |
773 | im->mca_crcount = idev->mc_qrv; | |
774 | im->mca_sfmode = pmc->mca_sfmode; | |
775 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
776 | im->mca_tomb = pmc->mca_tomb; | |
777 | im->mca_sources = pmc->mca_sources; | |
778 | for (psf = im->mca_sources; psf; psf = psf->sf_next) | |
779 | psf->sf_crcount = im->mca_crcount; | |
1da177e4 LT |
780 | } |
781 | in6_dev_put(pmc->idev); | |
9c8bb163 | 782 | kfree(pmc); |
1da177e4 | 783 | } |
1666d49e | 784 | spin_unlock_bh(&im->mca_lock); |
1da177e4 LT |
785 | } |
786 | ||
787 | static void mld_clear_delrec(struct inet6_dev *idev) | |
788 | { | |
789 | struct ifmcaddr6 *pmc, *nextpmc; | |
790 | ||
6457d26b | 791 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
792 | pmc = idev->mc_tomb; |
793 | idev->mc_tomb = NULL; | |
6457d26b | 794 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
795 | |
796 | for (; pmc; pmc = nextpmc) { | |
797 | nextpmc = pmc->next; | |
798 | ip6_mc_clear_src(pmc); | |
799 | in6_dev_put(pmc->idev); | |
800 | kfree(pmc); | |
801 | } | |
802 | ||
803 | /* clear dead sources, too */ | |
804 | read_lock_bh(&idev->lock); | |
67ba4152 | 805 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
806 | struct ip6_sf_list *psf, *psf_next; |
807 | ||
808 | spin_lock_bh(&pmc->mca_lock); | |
809 | psf = pmc->mca_tomb; | |
810 | pmc->mca_tomb = NULL; | |
811 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 812 | for (; psf; psf = psf_next) { |
1da177e4 LT |
813 | psf_next = psf->sf_next; |
814 | kfree(psf); | |
815 | } | |
816 | } | |
817 | read_unlock_bh(&idev->lock); | |
818 | } | |
819 | ||
1691c63e WC |
820 | static void mca_get(struct ifmcaddr6 *mc) |
821 | { | |
d3981bc6 | 822 | refcount_inc(&mc->mca_refcnt); |
1691c63e WC |
823 | } |
824 | ||
825 | static void ma_put(struct ifmcaddr6 *mc) | |
826 | { | |
d3981bc6 | 827 | if (refcount_dec_and_test(&mc->mca_refcnt)) { |
1691c63e WC |
828 | in6_dev_put(mc->idev); |
829 | kfree(mc); | |
830 | } | |
831 | } | |
832 | ||
833 | static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev, | |
834 | const struct in6_addr *addr) | |
835 | { | |
836 | struct ifmcaddr6 *mc; | |
837 | ||
838 | mc = kzalloc(sizeof(*mc), GFP_ATOMIC); | |
63159f29 | 839 | if (!mc) |
1691c63e WC |
840 | return NULL; |
841 | ||
e99e88a9 | 842 | timer_setup(&mc->mca_timer, igmp6_timer_handler, 0); |
1691c63e WC |
843 | |
844 | mc->mca_addr = *addr; | |
845 | mc->idev = idev; /* reference taken by caller */ | |
846 | mc->mca_users = 1; | |
847 | /* mca_stamp should be updated upon changes */ | |
848 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
d3981bc6 | 849 | refcount_set(&mc->mca_refcnt, 1); |
1691c63e WC |
850 | spin_lock_init(&mc->mca_lock); |
851 | ||
852 | /* initial mode is (EX, empty) */ | |
853 | mc->mca_sfmode = MCAST_EXCLUDE; | |
854 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
855 | ||
856 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
857 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
858 | mc->mca_flags |= MAF_NOREPORT; | |
859 | ||
860 | return mc; | |
861 | } | |
1da177e4 LT |
862 | |
863 | /* | |
864 | * device multicast group inc (add if not found) | |
865 | */ | |
9acd9f3a | 866 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
867 | { |
868 | struct ifmcaddr6 *mc; | |
869 | struct inet6_dev *idev; | |
870 | ||
a9ed4a29 SD |
871 | ASSERT_RTNL(); |
872 | ||
96b52e61 | 873 | /* we need to take a reference on idev */ |
1da177e4 LT |
874 | idev = in6_dev_get(dev); |
875 | ||
63159f29 | 876 | if (!idev) |
1da177e4 LT |
877 | return -EINVAL; |
878 | ||
879 | write_lock_bh(&idev->lock); | |
880 | if (idev->dead) { | |
881 | write_unlock_bh(&idev->lock); | |
882 | in6_dev_put(idev); | |
883 | return -ENODEV; | |
884 | } | |
885 | ||
886 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
887 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
888 | mc->mca_users++; | |
889 | write_unlock_bh(&idev->lock); | |
890 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
891 | NULL, 0); | |
892 | in6_dev_put(idev); | |
893 | return 0; | |
894 | } | |
895 | } | |
896 | ||
1691c63e WC |
897 | mc = mca_alloc(idev, addr); |
898 | if (!mc) { | |
1da177e4 LT |
899 | write_unlock_bh(&idev->lock); |
900 | in6_dev_put(idev); | |
901 | return -ENOMEM; | |
902 | } | |
903 | ||
1da177e4 LT |
904 | mc->next = idev->mc_list; |
905 | idev->mc_list = mc; | |
1691c63e WC |
906 | |
907 | /* Hold this for the code below before we unlock, | |
908 | * it is already exposed via idev->mc_list. | |
909 | */ | |
910 | mca_get(mc); | |
1da177e4 LT |
911 | write_unlock_bh(&idev->lock); |
912 | ||
1666d49e | 913 | mld_del_delrec(idev, mc); |
1da177e4 LT |
914 | igmp6_group_added(mc); |
915 | ma_put(mc); | |
916 | return 0; | |
917 | } | |
918 | ||
919 | /* | |
920 | * device multicast group del | |
921 | */ | |
9acd9f3a | 922 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
923 | { |
924 | struct ifmcaddr6 *ma, **map; | |
925 | ||
a9ed4a29 SD |
926 | ASSERT_RTNL(); |
927 | ||
1da177e4 | 928 | write_lock_bh(&idev->lock); |
67ba4152 | 929 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
930 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
931 | if (--ma->mca_users == 0) { | |
932 | *map = ma->next; | |
933 | write_unlock_bh(&idev->lock); | |
934 | ||
935 | igmp6_group_dropped(ma); | |
1666d49e | 936 | ip6_mc_clear_src(ma); |
1da177e4 LT |
937 | |
938 | ma_put(ma); | |
939 | return 0; | |
940 | } | |
941 | write_unlock_bh(&idev->lock); | |
942 | return 0; | |
943 | } | |
944 | } | |
945 | write_unlock_bh(&idev->lock); | |
946 | ||
947 | return -ENOENT; | |
948 | } | |
949 | ||
9acd9f3a | 950 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 951 | { |
96b52e61 | 952 | struct inet6_dev *idev; |
1da177e4 LT |
953 | int err; |
954 | ||
414b6c94 | 955 | ASSERT_RTNL(); |
1da177e4 | 956 | |
96b52e61 ED |
957 | idev = __in6_dev_get(dev); |
958 | if (!idev) | |
959 | err = -ENODEV; | |
960 | else | |
961 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
962 | |
963 | return err; | |
964 | } | |
965 | ||
1da177e4 LT |
966 | /* |
967 | * check if the interface/address pair is valid | |
968 | */ | |
a50feda5 ED |
969 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
970 | const struct in6_addr *src_addr) | |
1da177e4 LT |
971 | { |
972 | struct inet6_dev *idev; | |
973 | struct ifmcaddr6 *mc; | |
a50feda5 | 974 | bool rv = false; |
1da177e4 | 975 | |
96b52e61 ED |
976 | rcu_read_lock(); |
977 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
978 | if (idev) { |
979 | read_lock_bh(&idev->lock); | |
67ba4152 | 980 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
981 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
982 | break; | |
983 | } | |
984 | if (mc) { | |
985 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
986 | struct ip6_sf_list *psf; | |
987 | ||
988 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 989 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
990 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
991 | break; | |
992 | } | |
993 | if (psf) | |
994 | rv = psf->sf_count[MCAST_INCLUDE] || | |
995 | psf->sf_count[MCAST_EXCLUDE] != | |
996 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
997 | else | |
67ba4152 | 998 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
999 | spin_unlock_bh(&mc->mca_lock); |
1000 | } else | |
a50feda5 | 1001 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
1002 | } |
1003 | read_unlock_bh(&idev->lock); | |
1da177e4 | 1004 | } |
96b52e61 | 1005 | rcu_read_unlock(); |
1da177e4 LT |
1006 | return rv; |
1007 | } | |
1008 | ||
1009 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1010 | { | |
63862b5b | 1011 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
1012 | |
1013 | idev->mc_gq_running = 1; | |
1014 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1015 | in6_dev_hold(idev); | |
1016 | } | |
1017 | ||
b4af8def DB |
1018 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
1019 | { | |
1020 | idev->mc_gq_running = 0; | |
1021 | if (del_timer(&idev->mc_gq_timer)) | |
1022 | __in6_dev_put(idev); | |
1023 | } | |
1024 | ||
c2cef4e8 | 1025 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1026 | { |
63862b5b | 1027 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1028 | |
1029 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1030 | in6_dev_hold(idev); | |
1031 | } | |
1032 | ||
b4af8def DB |
1033 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1034 | { | |
1035 | idev->mc_ifc_count = 0; | |
1036 | if (del_timer(&idev->mc_ifc_timer)) | |
1037 | __in6_dev_put(idev); | |
1038 | } | |
1039 | ||
c2cef4e8 | 1040 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1041 | { |
63862b5b | 1042 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1043 | |
1044 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1045 | in6_dev_hold(idev); | |
1046 | } | |
1047 | ||
b4af8def DB |
1048 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1049 | { | |
1050 | if (del_timer(&idev->mc_dad_timer)) | |
1051 | __in6_dev_put(idev); | |
1052 | } | |
1053 | ||
1da177e4 LT |
1054 | /* |
1055 | * IGMP handling (alias multicast ICMPv6 messages) | |
1056 | */ | |
1057 | ||
1058 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1059 | { | |
1060 | unsigned long delay = resptime; | |
1061 | ||
1062 | /* Do not start timer for these addresses */ | |
1063 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1064 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1065 | return; | |
1066 | ||
1067 | if (del_timer(&ma->mca_timer)) { | |
d3981bc6 | 1068 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
1069 | delay = ma->mca_timer.expires - jiffies; |
1070 | } | |
1071 | ||
cc7f7ab7 | 1072 | if (delay >= resptime) |
63862b5b | 1073 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1074 | |
1da177e4 LT |
1075 | ma->mca_timer.expires = jiffies + delay; |
1076 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
d3981bc6 | 1077 | refcount_inc(&ma->mca_refcnt); |
1da177e4 LT |
1078 | ma->mca_flags |= MAF_TIMER_RUNNING; |
1079 | } | |
1080 | ||
5ab4a6c8 | 1081 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1082 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1083 | const struct in6_addr *srcs) | |
1da177e4 LT |
1084 | { |
1085 | struct ip6_sf_list *psf; | |
1086 | int i, scount; | |
1087 | ||
1088 | scount = 0; | |
67ba4152 | 1089 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1090 | if (scount == nsrcs) |
1091 | break; | |
67ba4152 | 1092 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1093 | /* skip inactive filters */ |
e05c4ad3 | 1094 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1095 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1096 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1097 | break; |
5ab4a6c8 DS |
1098 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1099 | scount++; | |
1100 | break; | |
1101 | } | |
1102 | } | |
1103 | } | |
1104 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1105 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1106 | return false; |
1107 | return true; | |
5ab4a6c8 DS |
1108 | } |
1109 | ||
a50feda5 ED |
1110 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1111 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1112 | { |
1113 | struct ip6_sf_list *psf; | |
1114 | int i, scount; | |
1115 | ||
1116 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1117 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1118 | ||
1119 | /* mark INCLUDE-mode sources */ | |
1120 | ||
1121 | scount = 0; | |
67ba4152 | 1122 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1123 | if (scount == nsrcs) |
1124 | break; | |
67ba4152 | 1125 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1126 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1127 | psf->sf_gsresp = 1; | |
1128 | scount++; | |
1129 | break; | |
1130 | } | |
5ab4a6c8 DS |
1131 | } |
1132 | } | |
1133 | if (!scount) { | |
1134 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1135 | return false; |
1da177e4 | 1136 | } |
5ab4a6c8 | 1137 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1138 | return true; |
1da177e4 LT |
1139 | } |
1140 | ||
58c0ecfd DB |
1141 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1142 | { | |
1143 | /* Normally, both are 0 here. If enforcement to a particular is | |
1144 | * being used, individual device enforcement will have a lower | |
1145 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1146 | */ | |
1147 | ||
1148 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1149 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1150 | else | |
1151 | return idev->cnf.force_mld_version; | |
1152 | } | |
1153 | ||
1154 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1155 | { | |
1156 | return mld_force_mld_version(idev) == 2; | |
1157 | } | |
1158 | ||
1159 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1160 | { | |
1161 | return mld_force_mld_version(idev) == 1; | |
1162 | } | |
1163 | ||
6c567b78 DB |
1164 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1165 | { | |
58c0ecfd DB |
1166 | if (mld_in_v2_mode_only(idev)) |
1167 | return false; | |
1168 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1169 | return true; |
1170 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1171 | return true; | |
1172 | ||
1173 | return false; | |
1174 | } | |
1175 | ||
89225d1c DB |
1176 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1177 | { | |
1178 | /* RFC3810, relevant sections: | |
1179 | * - 9.1. Robustness Variable | |
1180 | * - 9.2. Query Interval | |
1181 | * - 9.3. Query Response Interval | |
1182 | * - 9.12. Older Version Querier Present Timeout | |
1183 | */ | |
1184 | unsigned long switchback; | |
1185 | ||
1186 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1187 | ||
1188 | idev->mc_v1_seen = jiffies + switchback; | |
1189 | } | |
1190 | ||
1191 | static void mld_update_qrv(struct inet6_dev *idev, | |
1192 | const struct mld2_query *mlh2) | |
1193 | { | |
1194 | /* RFC3810, relevant sections: | |
1195 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1196 | * - 9.1. Robustness Variable | |
1197 | */ | |
1198 | ||
1199 | /* The value of the Robustness Variable MUST NOT be zero, | |
1200 | * and SHOULD NOT be one. Catch this here if we ever run | |
1201 | * into such a case in future. | |
1202 | */ | |
2f711939 | 1203 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1204 | WARN_ON(idev->mc_qrv == 0); |
1205 | ||
1206 | if (mlh2->mld2q_qrv > 0) | |
1207 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1208 | ||
2f711939 | 1209 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1210 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1211 | idev->mc_qrv, min_qrv); |
1212 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1213 | } |
1214 | } | |
1215 | ||
1216 | static void mld_update_qi(struct inet6_dev *idev, | |
1217 | const struct mld2_query *mlh2) | |
1218 | { | |
1219 | /* RFC3810, relevant sections: | |
1220 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1221 | * - 9.2. Query Interval | |
1222 | * - 9.12. Older Version Querier Present Timeout | |
1223 | * (the [Query Interval] in the last Query received) | |
1224 | */ | |
1225 | unsigned long mc_qqi; | |
1226 | ||
1227 | if (mlh2->mld2q_qqic < 128) { | |
1228 | mc_qqi = mlh2->mld2q_qqic; | |
1229 | } else { | |
1230 | unsigned long mc_man, mc_exp; | |
1231 | ||
1232 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1233 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1234 | ||
1235 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1236 | } | |
1237 | ||
1238 | idev->mc_qi = mc_qqi * HZ; | |
1239 | } | |
1240 | ||
1241 | static void mld_update_qri(struct inet6_dev *idev, | |
1242 | const struct mld2_query *mlh2) | |
1243 | { | |
1244 | /* RFC3810, relevant sections: | |
1245 | * - 5.1.3. Maximum Response Code | |
1246 | * - 9.3. Query Response Interval | |
1247 | */ | |
e3f5b170 | 1248 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1249 | } |
1250 | ||
2b7c121f | 1251 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
35f7aa53 | 1252 | unsigned long *max_delay, bool v1_query) |
2b7c121f DB |
1253 | { |
1254 | unsigned long mldv1_md; | |
1255 | ||
1256 | /* Ignore v1 queries */ | |
1257 | if (mld_in_v2_mode_only(idev)) | |
1258 | return -EINVAL; | |
1259 | ||
2b7c121f | 1260 | mldv1_md = ntohs(mld->mld_maxdelay); |
35f7aa53 DB |
1261 | |
1262 | /* When in MLDv1 fallback and a MLDv2 router start-up being | |
1263 | * unaware of current MLDv1 operation, the MRC == MRD mapping | |
1264 | * only works when the exponential algorithm is not being | |
1265 | * used (as MLDv1 is unaware of such things). | |
1266 | * | |
1267 | * According to the RFC author, the MLDv2 implementations | |
1268 | * he's aware of all use a MRC < 32768 on start up queries. | |
1269 | * | |
1270 | * Thus, should we *ever* encounter something else larger | |
1271 | * than that, just assume the maximum possible within our | |
1272 | * reach. | |
1273 | */ | |
1274 | if (!v1_query) | |
1275 | mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT); | |
1276 | ||
2b7c121f DB |
1277 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); |
1278 | ||
35f7aa53 DB |
1279 | /* MLDv1 router present: we need to go into v1 mode *only* |
1280 | * when an MLDv1 query is received as per section 9.12. of | |
1281 | * RFC3810! And we know from RFC2710 section 3.7 that MLDv1 | |
1282 | * queries MUST be of exactly 24 octets. | |
1283 | */ | |
1284 | if (v1_query) | |
1285 | mld_set_v1_mode(idev); | |
2b7c121f DB |
1286 | |
1287 | /* cancel MLDv2 report timer */ | |
b4af8def | 1288 | mld_gq_stop_timer(idev); |
2b7c121f | 1289 | /* cancel the interface change timer */ |
b4af8def | 1290 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1291 | /* clear deleted report items */ |
1292 | mld_clear_delrec(idev); | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1298 | unsigned long *max_delay) | |
1299 | { | |
2b7c121f DB |
1300 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); |
1301 | ||
1302 | mld_update_qrv(idev, mld); | |
1303 | mld_update_qi(idev, mld); | |
1304 | mld_update_qri(idev, mld); | |
1305 | ||
1306 | idev->mc_maxdelay = *max_delay; | |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | ||
96b52e61 | 1311 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1312 | int igmp6_event_query(struct sk_buff *skb) |
1313 | { | |
97300b5f | 1314 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1315 | struct ifmcaddr6 *ma; |
b71d1d42 | 1316 | const struct in6_addr *group; |
1da177e4 LT |
1317 | unsigned long max_delay; |
1318 | struct inet6_dev *idev; | |
6e7cb837 | 1319 | struct mld_msg *mld; |
1da177e4 LT |
1320 | int group_type; |
1321 | int mark = 0; | |
2b7c121f | 1322 | int len, err; |
1da177e4 LT |
1323 | |
1324 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | /* compute payload length excluding extension headers */ | |
0660e03f | 1328 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1329 | len -= skb_network_header_len(skb); |
1da177e4 | 1330 | |
e940f5d6 HL |
1331 | /* RFC3810 6.2 |
1332 | * Upon reception of an MLD message that contains a Query, the node | |
1333 | * checks if the source address of the message is a valid link-local | |
1334 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1335 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1336 | * packet. If any of these checks fails, the packet is dropped. | |
1337 | */ | |
1338 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1339 | ipv6_hdr(skb)->hop_limit != 1 || | |
1340 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1341 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1342 | return -EINVAL; |
1343 | ||
96b52e61 | 1344 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1345 | if (!idev) |
1da177e4 LT |
1346 | return 0; |
1347 | ||
6e7cb837 YH |
1348 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1349 | group = &mld->mld_mca; | |
1da177e4 LT |
1350 | group_type = ipv6_addr_type(group); |
1351 | ||
1352 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1353 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1354 | return -EINVAL; |
1da177e4 | 1355 | |
35f7aa53 DB |
1356 | if (len < MLD_V1_QUERY_LEN) { |
1357 | return -EINVAL; | |
1358 | } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) { | |
1359 | err = mld_process_v1(idev, mld, &max_delay, | |
1360 | len == MLD_V1_QUERY_LEN); | |
2b7c121f DB |
1361 | if (err < 0) |
1362 | return err; | |
9fd07841 | 1363 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1364 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1365 | sizeof(struct icmp6hdr); |
89225d1c | 1366 | |
96b52e61 | 1367 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1368 | return -EINVAL; |
96b52e61 | 1369 | |
9c70220b | 1370 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1371 | |
2b7c121f DB |
1372 | err = mld_process_v2(idev, mlh2, &max_delay); |
1373 | if (err < 0) | |
1374 | return err; | |
89225d1c | 1375 | |
1da177e4 | 1376 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1377 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1378 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1379 | |
1da177e4 | 1380 | mld_gq_start_timer(idev); |
1da177e4 LT |
1381 | return 0; |
1382 | } | |
1383 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1384 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1385 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1386 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1387 | return -EINVAL; |
96b52e61 | 1388 | |
9c70220b | 1389 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1390 | mark = 1; |
1391 | } | |
35f7aa53 | 1392 | } else { |
1da177e4 | 1393 | return -EINVAL; |
35f7aa53 | 1394 | } |
1da177e4 LT |
1395 | |
1396 | read_lock_bh(&idev->lock); | |
1397 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1398 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1399 | spin_lock_bh(&ma->mca_lock); |
1400 | igmp6_group_queried(ma, max_delay); | |
1401 | spin_unlock_bh(&ma->mca_lock); | |
1402 | } | |
1403 | } else { | |
67ba4152 | 1404 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1405 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1406 | continue; |
1407 | spin_lock_bh(&ma->mca_lock); | |
1408 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1409 | /* gsquery <- gsquery && mark */ | |
1410 | if (!mark) | |
1411 | ma->mca_flags &= ~MAF_GSQUERY; | |
1412 | } else { | |
1413 | /* gsquery <- mark */ | |
1414 | if (mark) | |
1415 | ma->mca_flags |= MAF_GSQUERY; | |
1416 | else | |
1417 | ma->mca_flags &= ~MAF_GSQUERY; | |
1418 | } | |
5ab4a6c8 | 1419 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1420 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1421 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1422 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1423 | break; |
1da177e4 LT |
1424 | } |
1425 | } | |
1426 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1427 | |
1428 | return 0; | |
1429 | } | |
1430 | ||
96b52e61 | 1431 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1432 | int igmp6_event_report(struct sk_buff *skb) |
1433 | { | |
1434 | struct ifmcaddr6 *ma; | |
1da177e4 | 1435 | struct inet6_dev *idev; |
6e7cb837 | 1436 | struct mld_msg *mld; |
1da177e4 LT |
1437 | int addr_type; |
1438 | ||
1439 | /* Our own report looped back. Ignore it. */ | |
1440 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1441 | return 0; | |
1442 | ||
24c69275 DS |
1443 | /* send our report if the MC router may not have heard this report */ |
1444 | if (skb->pkt_type != PACKET_MULTICAST && | |
1445 | skb->pkt_type != PACKET_BROADCAST) | |
1446 | return 0; | |
1447 | ||
6e7cb837 | 1448 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1449 | return -EINVAL; |
1450 | ||
6e7cb837 | 1451 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1452 | |
1453 | /* Drop reports with not link local source */ | |
0660e03f | 1454 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1455 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1456 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1457 | return -EINVAL; | |
1458 | ||
96b52e61 | 1459 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1460 | if (!idev) |
1da177e4 LT |
1461 | return -ENODEV; |
1462 | ||
1463 | /* | |
1464 | * Cancel the timer for this group | |
1465 | */ | |
1466 | ||
1467 | read_lock_bh(&idev->lock); | |
67ba4152 | 1468 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1469 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1470 | spin_lock(&ma->mca_lock); |
1471 | if (del_timer(&ma->mca_timer)) | |
d3981bc6 | 1472 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
1473 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); |
1474 | spin_unlock(&ma->mca_lock); | |
1475 | break; | |
1476 | } | |
1477 | } | |
1478 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1479 | return 0; |
1480 | } | |
1481 | ||
a50feda5 ED |
1482 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1483 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1484 | { |
1485 | switch (type) { | |
1486 | case MLD2_MODE_IS_INCLUDE: | |
1487 | case MLD2_MODE_IS_EXCLUDE: | |
1488 | if (gdeleted || sdeleted) | |
a50feda5 | 1489 | return false; |
5ab4a6c8 DS |
1490 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1491 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1492 | return true; |
5ab4a6c8 DS |
1493 | /* don't include if this source is excluded |
1494 | * in all filters | |
1495 | */ | |
1496 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1497 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1498 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1499 | psf->sf_count[MCAST_EXCLUDE]; | |
1500 | } | |
a50feda5 | 1501 | return false; |
1da177e4 LT |
1502 | case MLD2_CHANGE_TO_INCLUDE: |
1503 | if (gdeleted || sdeleted) | |
a50feda5 | 1504 | return false; |
1da177e4 LT |
1505 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1506 | case MLD2_CHANGE_TO_EXCLUDE: | |
1507 | if (gdeleted || sdeleted) | |
a50feda5 | 1508 | return false; |
1da177e4 LT |
1509 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1510 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1511 | return false; |
1da177e4 LT |
1512 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1513 | psf->sf_count[MCAST_EXCLUDE]; | |
1514 | case MLD2_ALLOW_NEW_SOURCES: | |
1515 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1516 | return false; |
1da177e4 LT |
1517 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1518 | case MLD2_BLOCK_OLD_SOURCES: | |
1519 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1520 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1521 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1522 | } | |
a50feda5 | 1523 | return false; |
1da177e4 LT |
1524 | } |
1525 | ||
1526 | static int | |
1527 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1528 | { | |
1529 | struct ip6_sf_list *psf; | |
1530 | int scount = 0; | |
1531 | ||
67ba4152 | 1532 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1533 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1534 | continue; | |
1535 | scount++; | |
1536 | } | |
1537 | return scount; | |
1538 | } | |
1539 | ||
2576f17d YH |
1540 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1541 | struct net_device *dev, | |
1542 | const struct in6_addr *saddr, | |
1543 | const struct in6_addr *daddr, | |
1544 | int proto, int len) | |
1545 | { | |
1546 | struct ipv6hdr *hdr; | |
1547 | ||
1548 | skb->protocol = htons(ETH_P_IPV6); | |
1549 | skb->dev = dev; | |
1550 | ||
1551 | skb_reset_network_header(skb); | |
1552 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1553 | hdr = ipv6_hdr(skb); | |
1554 | ||
1555 | ip6_flow_hdr(hdr, 0, 0); | |
1556 | ||
1557 | hdr->payload_len = htons(len); | |
1558 | hdr->nexthdr = proto; | |
1559 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1560 | ||
1561 | hdr->saddr = *saddr; | |
1562 | hdr->daddr = *daddr; | |
1563 | } | |
1564 | ||
4c672e4b | 1565 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu) |
1da177e4 | 1566 | { |
8965779d | 1567 | struct net_device *dev = idev->dev; |
c346dca1 | 1568 | struct net *net = dev_net(dev); |
b8ad0cbc | 1569 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1570 | struct sk_buff *skb; |
1571 | struct mld2_report *pmr; | |
1572 | struct in6_addr addr_buf; | |
d7aabf22 | 1573 | const struct in6_addr *saddr; |
a7ae1992 HX |
1574 | int hlen = LL_RESERVED_SPACE(dev); |
1575 | int tlen = dev->needed_tailroom; | |
4c672e4b | 1576 | unsigned int size = mtu + hlen + tlen; |
1da177e4 LT |
1577 | int err; |
1578 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1579 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1580 | IPV6_TLV_PADN, 0 }; | |
1581 | ||
1582 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1583 | /* limit our allocations to order-0 page */ |
1584 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1585 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1586 | |
cfcabdcc | 1587 | if (!skb) |
1da177e4 LT |
1588 | return NULL; |
1589 | ||
9d4a0314 | 1590 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1591 | skb_reserve(skb, hlen); |
1837b2e2 | 1592 | skb_tailroom_reserve(skb, mtu, tlen); |
1da177e4 | 1593 | |
8965779d | 1594 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1595 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1596 | * use unspecified address as the source address |
1da177e4 LT |
1597 | * when a valid link-local address is not available. |
1598 | */ | |
d7aabf22 YH |
1599 | saddr = &in6addr_any; |
1600 | } else | |
1601 | saddr = &addr_buf; | |
1da177e4 | 1602 | |
2576f17d | 1603 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 | 1604 | |
59ae1d12 | 1605 | skb_put_data(skb, ra, sizeof(ra)); |
1da177e4 | 1606 | |
27a884dc | 1607 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1608 | skb_put(skb, sizeof(*pmr)); |
1609 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1610 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1611 | pmr->mld2r_resv1 = 0; | |
1612 | pmr->mld2r_cksum = 0; | |
1613 | pmr->mld2r_resv2 = 0; | |
1614 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1615 | return skb; |
1616 | } | |
1617 | ||
1618 | static void mld_sendpack(struct sk_buff *skb) | |
1619 | { | |
0660e03f | 1620 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1621 | struct mld2_report *pmr = |
1622 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1623 | int payload_len, mldlen; |
96b52e61 | 1624 | struct inet6_dev *idev; |
c346dca1 | 1625 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1626 | int err; |
4c9483b2 | 1627 | struct flowi6 fl6; |
adf30907 | 1628 | struct dst_entry *dst; |
1da177e4 | 1629 | |
96b52e61 ED |
1630 | rcu_read_lock(); |
1631 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1632 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1633 | ||
29a3cad5 SH |
1634 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1635 | sizeof(*pip6); | |
1636 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1637 | pip6->payload_len = htons(payload_len); |
1638 | ||
6e7cb837 YH |
1639 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1640 | IPPROTO_ICMPV6, | |
1641 | csum_partial(skb_transport_header(skb), | |
1642 | mldlen, 0)); | |
41927178 | 1643 | |
4c9483b2 | 1644 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1645 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1646 | skb->dev->ifindex); | |
12fd84f4 | 1647 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1648 | |
452edd59 DM |
1649 | err = 0; |
1650 | if (IS_ERR(dst)) { | |
1651 | err = PTR_ERR(dst); | |
1652 | dst = NULL; | |
1653 | } | |
adf30907 | 1654 | skb_dst_set(skb, dst); |
41927178 YH |
1655 | if (err) |
1656 | goto err_out; | |
1657 | ||
edf391ff NH |
1658 | payload_len = skb->len; |
1659 | ||
7026b1dd | 1660 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
29a26a56 | 1661 | net, net->ipv6.igmp_sk, skb, NULL, skb->dev, |
13206b6b | 1662 | dst_output); |
41927178 | 1663 | out: |
1da177e4 | 1664 | if (!err) { |
43a43b60 HFS |
1665 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1666 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
43a43b60 HFS |
1667 | } else { |
1668 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1669 | } | |
1da177e4 | 1670 | |
96b52e61 | 1671 | rcu_read_unlock(); |
41927178 YH |
1672 | return; |
1673 | ||
1674 | err_out: | |
1675 | kfree_skb(skb); | |
1676 | goto out; | |
1da177e4 LT |
1677 | } |
1678 | ||
1679 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1680 | { | |
fab10fe3 | 1681 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
b9b312a7 | 1685 | int type, struct mld2_grec **ppgr, unsigned int mtu) |
1da177e4 | 1686 | { |
1da177e4 LT |
1687 | struct mld2_report *pmr; |
1688 | struct mld2_grec *pgr; | |
1689 | ||
b9b312a7 ED |
1690 | if (!skb) { |
1691 | skb = mld_newpack(pmc->idev, mtu); | |
1692 | if (!skb) | |
1693 | return NULL; | |
1694 | } | |
4df864c1 | 1695 | pgr = skb_put(skb, sizeof(struct mld2_grec)); |
1da177e4 LT |
1696 | pgr->grec_type = type; |
1697 | pgr->grec_auxwords = 0; | |
1698 | pgr->grec_nsrcs = 0; | |
1699 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1700 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1701 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1702 | *ppgr = pgr; |
1703 | return skb; | |
1704 | } | |
1705 | ||
4c672e4b | 1706 | #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0) |
1da177e4 LT |
1707 | |
1708 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1709 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1710 | { |
8965779d AW |
1711 | struct inet6_dev *idev = pmc->idev; |
1712 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1713 | struct mld2_report *pmr; |
1714 | struct mld2_grec *pgr = NULL; | |
1715 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1716 | int scount, stotal, first, isquery, truncate; |
b9b312a7 | 1717 | unsigned int mtu; |
1da177e4 LT |
1718 | |
1719 | if (pmc->mca_flags & MAF_NOREPORT) | |
1720 | return skb; | |
1721 | ||
b9b312a7 ED |
1722 | mtu = READ_ONCE(dev->mtu); |
1723 | if (mtu < IPV6_MIN_MTU) | |
1724 | return skb; | |
1725 | ||
1da177e4 LT |
1726 | isquery = type == MLD2_MODE_IS_INCLUDE || |
1727 | type == MLD2_MODE_IS_EXCLUDE; | |
1728 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1729 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1730 | ||
5ab4a6c8 DS |
1731 | stotal = scount = 0; |
1732 | ||
1da177e4 LT |
1733 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1734 | ||
5ab4a6c8 DS |
1735 | if (!*psf_list) |
1736 | goto empty_source; | |
1737 | ||
9c70220b | 1738 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1739 | |
1740 | /* EX and TO_EX get a fresh packet, if needed */ | |
1741 | if (truncate) { | |
6e7cb837 | 1742 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1743 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1744 | if (skb) | |
1745 | mld_sendpack(skb); | |
b9b312a7 | 1746 | skb = mld_newpack(idev, mtu); |
1da177e4 LT |
1747 | } |
1748 | } | |
1749 | first = 1; | |
1da177e4 | 1750 | psf_prev = NULL; |
67ba4152 | 1751 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1752 | struct in6_addr *psrc; |
1753 | ||
1754 | psf_next = psf->sf_next; | |
1755 | ||
1756 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1757 | psf_prev = psf; | |
1758 | continue; | |
1759 | } | |
1760 | ||
a052517a HL |
1761 | /* Based on RFC3810 6.1. Should not send source-list change |
1762 | * records when there is a filter mode change. | |
1763 | */ | |
1764 | if (((gdeleted && pmc->mca_sfmode == MCAST_EXCLUDE) || | |
1765 | (!gdeleted && pmc->mca_crcount)) && | |
1766 | (type == MLD2_ALLOW_NEW_SOURCES || | |
1767 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) | |
1768 | goto decrease_sf_crcount; | |
1769 | ||
1da177e4 LT |
1770 | /* clear marks on query responses */ |
1771 | if (isquery) | |
1772 | psf->sf_gsresp = 0; | |
1773 | ||
1774 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1775 | first*sizeof(struct mld2_grec)) { | |
1776 | if (truncate && !first) | |
1777 | break; /* truncate these */ | |
1778 | if (pgr) | |
1779 | pgr->grec_nsrcs = htons(scount); | |
1780 | if (skb) | |
1781 | mld_sendpack(skb); | |
b9b312a7 | 1782 | skb = mld_newpack(idev, mtu); |
1da177e4 LT |
1783 | first = 1; |
1784 | scount = 0; | |
1785 | } | |
1786 | if (first) { | |
b9b312a7 | 1787 | skb = add_grhead(skb, pmc, type, &pgr, mtu); |
1da177e4 LT |
1788 | first = 0; |
1789 | } | |
cc63f70b AD |
1790 | if (!skb) |
1791 | return NULL; | |
4df864c1 | 1792 | psrc = skb_put(skb, sizeof(*psrc)); |
1da177e4 | 1793 | *psrc = psf->sf_addr; |
5ab4a6c8 | 1794 | scount++; stotal++; |
1da177e4 LT |
1795 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1796 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
a052517a | 1797 | decrease_sf_crcount: |
1da177e4 LT |
1798 | psf->sf_crcount--; |
1799 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1800 | if (psf_prev) | |
1801 | psf_prev->sf_next = psf->sf_next; | |
1802 | else | |
1803 | *psf_list = psf->sf_next; | |
1804 | kfree(psf); | |
1805 | continue; | |
1806 | } | |
1807 | } | |
1808 | psf_prev = psf; | |
1809 | } | |
5ab4a6c8 DS |
1810 | |
1811 | empty_source: | |
1812 | if (!stotal) { | |
1813 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1814 | type == MLD2_BLOCK_OLD_SOURCES) | |
1815 | return skb; | |
6a7cc418 | 1816 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1817 | /* make sure we have room for group header */ |
1818 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1819 | mld_sendpack(skb); | |
1820 | skb = NULL; /* add_grhead will get a new one */ | |
1821 | } | |
b9b312a7 | 1822 | skb = add_grhead(skb, pmc, type, &pgr, mtu); |
5ab4a6c8 DS |
1823 | } |
1824 | } | |
1da177e4 LT |
1825 | if (pgr) |
1826 | pgr->grec_nsrcs = htons(scount); | |
1827 | ||
1828 | if (isquery) | |
1829 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1830 | return skb; | |
1831 | } | |
1832 | ||
1833 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1834 | { | |
1835 | struct sk_buff *skb = NULL; | |
1836 | int type; | |
1837 | ||
8965779d | 1838 | read_lock_bh(&idev->lock); |
1da177e4 | 1839 | if (!pmc) { |
67ba4152 | 1840 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1841 | if (pmc->mca_flags & MAF_NOREPORT) |
1842 | continue; | |
1843 | spin_lock_bh(&pmc->mca_lock); | |
1844 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1845 | type = MLD2_MODE_IS_EXCLUDE; | |
1846 | else | |
1847 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1848 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1849 | spin_unlock_bh(&pmc->mca_lock); |
1850 | } | |
1da177e4 LT |
1851 | } else { |
1852 | spin_lock_bh(&pmc->mca_lock); | |
1853 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1854 | type = MLD2_MODE_IS_EXCLUDE; | |
1855 | else | |
1856 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1857 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1858 | spin_unlock_bh(&pmc->mca_lock); |
1859 | } | |
8965779d | 1860 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1861 | if (skb) |
1862 | mld_sendpack(skb); | |
1863 | } | |
1864 | ||
1865 | /* | |
1866 | * remove zero-count source records from a source filter list | |
1867 | */ | |
1868 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1869 | { | |
1870 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1871 | ||
1872 | psf_prev = NULL; | |
67ba4152 | 1873 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1874 | psf_next = psf->sf_next; |
1875 | if (psf->sf_crcount == 0) { | |
1876 | if (psf_prev) | |
1877 | psf_prev->sf_next = psf->sf_next; | |
1878 | else | |
1879 | *ppsf = psf->sf_next; | |
1880 | kfree(psf); | |
1881 | } else | |
1882 | psf_prev = psf; | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | static void mld_send_cr(struct inet6_dev *idev) | |
1887 | { | |
1888 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1889 | struct sk_buff *skb = NULL; | |
1890 | int type, dtype; | |
1891 | ||
1892 | read_lock_bh(&idev->lock); | |
6457d26b | 1893 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1894 | |
1895 | /* deleted MCA's */ | |
1896 | pmc_prev = NULL; | |
67ba4152 | 1897 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1898 | pmc_next = pmc->next; |
1899 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1900 | type = MLD2_BLOCK_OLD_SOURCES; | |
1901 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1902 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1903 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1904 | } |
1905 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1906 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1907 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1908 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1909 | } |
5ab4a6c8 | 1910 | pmc->mca_crcount--; |
1da177e4 LT |
1911 | if (pmc->mca_crcount == 0) { |
1912 | mld_clear_zeros(&pmc->mca_tomb); | |
1913 | mld_clear_zeros(&pmc->mca_sources); | |
1914 | } | |
1915 | } | |
1916 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1917 | !pmc->mca_sources) { | |
1918 | if (pmc_prev) | |
1919 | pmc_prev->next = pmc_next; | |
1920 | else | |
1921 | idev->mc_tomb = pmc_next; | |
1922 | in6_dev_put(pmc->idev); | |
1923 | kfree(pmc); | |
1924 | } else | |
1925 | pmc_prev = pmc; | |
1926 | } | |
6457d26b | 1927 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1928 | |
1929 | /* change recs */ | |
67ba4152 | 1930 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1931 | spin_lock_bh(&pmc->mca_lock); |
1932 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1933 | type = MLD2_BLOCK_OLD_SOURCES; | |
1934 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1935 | } else { | |
1936 | type = MLD2_ALLOW_NEW_SOURCES; | |
1937 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1938 | } | |
6a7cc418 FL |
1939 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1940 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1941 | |
1942 | /* filter mode changes */ | |
1943 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1944 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1945 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1946 | else | |
1947 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1948 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1949 | pmc->mca_crcount--; |
1da177e4 LT |
1950 | } |
1951 | spin_unlock_bh(&pmc->mca_lock); | |
1952 | } | |
1953 | read_unlock_bh(&idev->lock); | |
1954 | if (!skb) | |
1955 | return; | |
1956 | (void) mld_sendpack(skb); | |
1957 | } | |
1958 | ||
1959 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1960 | { | |
c346dca1 | 1961 | struct net *net = dev_net(dev); |
b8ad0cbc | 1962 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1963 | struct inet6_dev *idev; |
1ab1457c | 1964 | struct sk_buff *skb; |
6e7cb837 | 1965 | struct mld_msg *hdr; |
d7aabf22 | 1966 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1967 | struct in6_addr addr_buf; |
a7ae1992 HX |
1968 | int hlen = LL_RESERVED_SPACE(dev); |
1969 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1970 | int err, len, payload_len, full_len; |
1971 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1972 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1973 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1974 | struct flowi6 fl6; |
adf30907 | 1975 | struct dst_entry *dst; |
1da177e4 | 1976 | |
f3ee4010 YH |
1977 | if (type == ICMPV6_MGM_REDUCTION) |
1978 | snd_addr = &in6addr_linklocal_allrouters; | |
1979 | else | |
1980 | snd_addr = addr; | |
1da177e4 LT |
1981 | |
1982 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1983 | payload_len = len + sizeof(ra); | |
1984 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1985 | ||
edf391ff NH |
1986 | rcu_read_lock(); |
1987 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1988 | IPSTATS_MIB_OUT, full_len); | |
1989 | rcu_read_unlock(); | |
1990 | ||
a7ae1992 | 1991 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 | 1992 | |
63159f29 | 1993 | if (!skb) { |
a11d206d | 1994 | rcu_read_lock(); |
3bd653c8 | 1995 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1996 | IPSTATS_MIB_OUTDISCARDS); |
1997 | rcu_read_unlock(); | |
1da177e4 LT |
1998 | return; |
1999 | } | |
9d4a0314 | 2000 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 2001 | skb_reserve(skb, hlen); |
1da177e4 | 2002 | |
95c385b4 | 2003 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 2004 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 2005 | * use unspecified address as the source address |
1da177e4 LT |
2006 | * when a valid link-local address is not available. |
2007 | */ | |
d7aabf22 YH |
2008 | saddr = &in6addr_any; |
2009 | } else | |
2010 | saddr = &addr_buf; | |
1da177e4 | 2011 | |
2576f17d | 2012 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 | 2013 | |
59ae1d12 | 2014 | skb_put_data(skb, ra, sizeof(ra)); |
1da177e4 | 2015 | |
b080db58 | 2016 | hdr = skb_put_zero(skb, sizeof(struct mld_msg)); |
6e7cb837 | 2017 | hdr->mld_type = type; |
4e3fd7a0 | 2018 | hdr->mld_mca = *addr; |
1da177e4 | 2019 | |
6e7cb837 YH |
2020 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
2021 | IPPROTO_ICMPV6, | |
2022 | csum_partial(hdr, len, 0)); | |
1da177e4 | 2023 | |
96b52e61 ED |
2024 | rcu_read_lock(); |
2025 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 2026 | |
4c9483b2 | 2027 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
2028 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
2029 | skb->dev->ifindex); | |
12fd84f4 | 2030 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
2031 | if (IS_ERR(dst)) { |
2032 | err = PTR_ERR(dst); | |
41927178 | 2033 | goto err_out; |
452edd59 | 2034 | } |
41927178 | 2035 | |
adf30907 | 2036 | skb_dst_set(skb, dst); |
29a26a56 EB |
2037 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
2038 | net, sk, skb, NULL, skb->dev, | |
13206b6b | 2039 | dst_output); |
41927178 | 2040 | out: |
1da177e4 | 2041 | if (!err) { |
5c5d244b | 2042 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 2043 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
1da177e4 | 2044 | } else |
3bd653c8 | 2045 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 2046 | |
96b52e61 | 2047 | rcu_read_unlock(); |
1da177e4 | 2048 | return; |
41927178 YH |
2049 | |
2050 | err_out: | |
2051 | kfree_skb(skb); | |
2052 | goto out; | |
1da177e4 LT |
2053 | } |
2054 | ||
6a7cc418 | 2055 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 2056 | { |
6a7cc418 FL |
2057 | struct sk_buff *skb; |
2058 | struct ifmcaddr6 *pmc; | |
2059 | int type; | |
2060 | ||
2061 | if (mld_in_v1_mode(idev)) | |
2062 | return; | |
2063 | ||
2064 | skb = NULL; | |
2065 | read_lock_bh(&idev->lock); | |
67ba4152 | 2066 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2067 | spin_lock_bh(&pmc->mca_lock); |
2068 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2069 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2070 | else | |
2071 | type = MLD2_CHANGE_TO_INCLUDE; | |
2072 | skb = add_grec(skb, pmc, type, 0, 0, 1); | |
2073 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2074 | } |
6a7cc418 FL |
2075 | read_unlock_bh(&idev->lock); |
2076 | if (skb) | |
2077 | mld_sendpack(skb); | |
b173ee48 HFS |
2078 | } |
2079 | ||
2080 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2081 | { | |
2082 | idev->mc_dad_count = idev->mc_qrv; | |
2083 | if (idev->mc_dad_count) { | |
6a7cc418 | 2084 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2085 | idev->mc_dad_count--; |
2086 | if (idev->mc_dad_count) | |
2087 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2088 | } | |
2089 | } | |
2090 | ||
e99e88a9 | 2091 | static void mld_dad_timer_expire(struct timer_list *t) |
b173ee48 | 2092 | { |
e99e88a9 | 2093 | struct inet6_dev *idev = from_timer(idev, t, mc_dad_timer); |
b173ee48 | 2094 | |
6a7cc418 | 2095 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2096 | if (idev->mc_dad_count) { |
2097 | idev->mc_dad_count--; | |
2098 | if (idev->mc_dad_count) | |
2099 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2100 | } | |
9260d3e1 | 2101 | in6_dev_put(idev); |
b173ee48 HFS |
2102 | } |
2103 | ||
1da177e4 | 2104 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2105 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2106 | { |
2107 | struct ip6_sf_list *psf, *psf_prev; | |
2108 | int rv = 0; | |
2109 | ||
2110 | psf_prev = NULL; | |
67ba4152 | 2111 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2112 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2113 | break; | |
2114 | psf_prev = psf; | |
2115 | } | |
2116 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2117 | /* source filter not found, or count wrong => bug */ | |
2118 | return -ESRCH; | |
2119 | } | |
2120 | psf->sf_count[sfmode]--; | |
2121 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2122 | struct inet6_dev *idev = pmc->idev; | |
2123 | ||
2124 | /* no more filters for this source */ | |
2125 | if (psf_prev) | |
2126 | psf_prev->sf_next = psf->sf_next; | |
2127 | else | |
2128 | pmc->mca_sources = psf->sf_next; | |
2129 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2130 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2131 | psf->sf_crcount = idev->mc_qrv; |
2132 | psf->sf_next = pmc->mca_tomb; | |
2133 | pmc->mca_tomb = psf; | |
2134 | rv = 1; | |
2135 | } else | |
2136 | kfree(psf); | |
2137 | } | |
2138 | return rv; | |
2139 | } | |
2140 | ||
b71d1d42 ED |
2141 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2142 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2143 | int delta) |
2144 | { | |
2145 | struct ifmcaddr6 *pmc; | |
2146 | int changerec = 0; | |
2147 | int i, err; | |
2148 | ||
2149 | if (!idev) | |
2150 | return -ENODEV; | |
2151 | read_lock_bh(&idev->lock); | |
67ba4152 | 2152 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2153 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2154 | break; | |
2155 | } | |
2156 | if (!pmc) { | |
2157 | /* MCA not found?? bug */ | |
2158 | read_unlock_bh(&idev->lock); | |
2159 | return -ESRCH; | |
2160 | } | |
2161 | spin_lock_bh(&pmc->mca_lock); | |
2162 | sf_markstate(pmc); | |
2163 | if (!delta) { | |
2164 | if (!pmc->mca_sfcount[sfmode]) { | |
2165 | spin_unlock_bh(&pmc->mca_lock); | |
2166 | read_unlock_bh(&idev->lock); | |
2167 | return -EINVAL; | |
2168 | } | |
2169 | pmc->mca_sfcount[sfmode]--; | |
2170 | } | |
2171 | err = 0; | |
67ba4152 | 2172 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2173 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2174 | ||
2175 | changerec |= rv > 0; | |
2176 | if (!err && rv < 0) | |
2177 | err = rv; | |
2178 | } | |
2179 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2180 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2181 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2182 | struct ip6_sf_list *psf; | |
2183 | ||
2184 | /* filter mode change */ | |
2185 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2186 | pmc->mca_crcount = idev->mc_qrv; | |
2187 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2188 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2189 | psf->sf_crcount = 0; |
2190 | mld_ifc_event(pmc->idev); | |
2191 | } else if (sf_setstate(pmc) || changerec) | |
2192 | mld_ifc_event(pmc->idev); | |
2193 | spin_unlock_bh(&pmc->mca_lock); | |
2194 | read_unlock_bh(&idev->lock); | |
2195 | return err; | |
2196 | } | |
2197 | ||
2198 | /* | |
2199 | * Add multicast single-source filter to the interface list | |
2200 | */ | |
2201 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2202 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2203 | { |
2204 | struct ip6_sf_list *psf, *psf_prev; | |
2205 | ||
2206 | psf_prev = NULL; | |
67ba4152 | 2207 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2208 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2209 | break; | |
2210 | psf_prev = psf; | |
2211 | } | |
2212 | if (!psf) { | |
0c600eda | 2213 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2214 | if (!psf) |
2215 | return -ENOBUFS; | |
0c600eda | 2216 | |
1da177e4 LT |
2217 | psf->sf_addr = *psfsrc; |
2218 | if (psf_prev) { | |
2219 | psf_prev->sf_next = psf; | |
2220 | } else | |
2221 | pmc->mca_sources = psf; | |
2222 | } | |
2223 | psf->sf_count[sfmode]++; | |
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2228 | { | |
2229 | struct ip6_sf_list *psf; | |
2230 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2231 | ||
67ba4152 | 2232 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2233 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2234 | psf->sf_oldin = mca_xcount == | |
2235 | psf->sf_count[MCAST_EXCLUDE] && | |
2236 | !psf->sf_count[MCAST_INCLUDE]; | |
2237 | } else | |
2238 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2239 | } | |
2240 | ||
2241 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2242 | { | |
7add2a43 | 2243 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2244 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2245 | int qrv = pmc->idev->mc_qrv; | |
2246 | int new_in, rv; | |
2247 | ||
2248 | rv = 0; | |
67ba4152 | 2249 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2250 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2251 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2252 | !psf->sf_count[MCAST_INCLUDE]; | |
2253 | } else | |
2254 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2255 | if (new_in) { |
2256 | if (!psf->sf_oldin) { | |
e80e28b6 | 2257 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2258 | |
67ba4152 IM |
2259 | for (dpsf = pmc->mca_tomb; dpsf; |
2260 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2261 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2262 | &psf->sf_addr)) | |
2263 | break; | |
2264 | prev = dpsf; | |
2265 | } | |
2266 | if (dpsf) { | |
2267 | if (prev) | |
2268 | prev->sf_next = dpsf->sf_next; | |
2269 | else | |
2270 | pmc->mca_tomb = dpsf->sf_next; | |
2271 | kfree(dpsf); | |
2272 | } | |
2273 | psf->sf_crcount = qrv; | |
2274 | rv++; | |
2275 | } | |
2276 | } else if (psf->sf_oldin) { | |
2277 | psf->sf_crcount = 0; | |
2278 | /* | |
2279 | * add or update "delete" records if an active filter | |
2280 | * is now inactive | |
2281 | */ | |
67ba4152 | 2282 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2283 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2284 | &psf->sf_addr)) | |
2285 | break; | |
2286 | if (!dpsf) { | |
5d55354f | 2287 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2288 | if (!dpsf) |
2289 | continue; | |
2290 | *dpsf = *psf; | |
2291 | /* pmc->mca_lock held by callers */ | |
2292 | dpsf->sf_next = pmc->mca_tomb; | |
2293 | pmc->mca_tomb = dpsf; | |
2294 | } | |
2295 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2296 | rv++; |
2297 | } | |
2298 | } | |
2299 | return rv; | |
2300 | } | |
2301 | ||
2302 | /* | |
2303 | * Add multicast source filter list to the interface list | |
2304 | */ | |
b71d1d42 ED |
2305 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2306 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2307 | int delta) |
2308 | { | |
2309 | struct ifmcaddr6 *pmc; | |
2310 | int isexclude; | |
2311 | int i, err; | |
2312 | ||
2313 | if (!idev) | |
2314 | return -ENODEV; | |
2315 | read_lock_bh(&idev->lock); | |
67ba4152 | 2316 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2317 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2318 | break; | |
2319 | } | |
2320 | if (!pmc) { | |
2321 | /* MCA not found?? bug */ | |
2322 | read_unlock_bh(&idev->lock); | |
2323 | return -ESRCH; | |
2324 | } | |
2325 | spin_lock_bh(&pmc->mca_lock); | |
2326 | ||
2327 | sf_markstate(pmc); | |
2328 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2329 | if (!delta) | |
2330 | pmc->mca_sfcount[sfmode]++; | |
2331 | err = 0; | |
67ba4152 | 2332 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2333 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2334 | if (err) |
2335 | break; | |
2336 | } | |
2337 | if (err) { | |
2338 | int j; | |
2339 | ||
2340 | if (!delta) | |
2341 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2342 | for (j = 0; j < i; j++) |
78d50217 | 2343 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2344 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2345 | struct ip6_sf_list *psf; |
2346 | ||
2347 | /* filter mode change */ | |
2348 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2349 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2350 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2351 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2352 | /* else no filters; keep old mode for reports */ | |
2353 | ||
2354 | pmc->mca_crcount = idev->mc_qrv; | |
2355 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2356 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2357 | psf->sf_crcount = 0; |
2358 | mld_ifc_event(idev); | |
2359 | } else if (sf_setstate(pmc)) | |
2360 | mld_ifc_event(idev); | |
2361 | spin_unlock_bh(&pmc->mca_lock); | |
2362 | read_unlock_bh(&idev->lock); | |
2363 | return err; | |
2364 | } | |
2365 | ||
2366 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2367 | { | |
2368 | struct ip6_sf_list *psf, *nextpsf; | |
2369 | ||
67ba4152 | 2370 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2371 | nextpsf = psf->sf_next; |
2372 | kfree(psf); | |
2373 | } | |
2374 | pmc->mca_tomb = NULL; | |
67ba4152 | 2375 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2376 | nextpsf = psf->sf_next; |
2377 | kfree(psf); | |
2378 | } | |
2379 | pmc->mca_sources = NULL; | |
2380 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2381 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2382 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2383 | } | |
2384 | ||
2385 | ||
2386 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2387 | { | |
2388 | unsigned long delay; | |
2389 | ||
2390 | if (ma->mca_flags & MAF_NOREPORT) | |
2391 | return; | |
2392 | ||
2393 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2394 | ||
63862b5b | 2395 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2396 | |
2397 | spin_lock_bh(&ma->mca_lock); | |
2398 | if (del_timer(&ma->mca_timer)) { | |
d3981bc6 | 2399 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
2400 | delay = ma->mca_timer.expires - jiffies; |
2401 | } | |
2402 | ||
2403 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
d3981bc6 | 2404 | refcount_inc(&ma->mca_refcnt); |
1da177e4 LT |
2405 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; |
2406 | spin_unlock_bh(&ma->mca_lock); | |
2407 | } | |
2408 | ||
2409 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2410 | struct inet6_dev *idev) | |
2411 | { | |
2412 | int err; | |
2413 | ||
f7ed925c | 2414 | /* callers have the socket lock and rtnl lock |
5ab4a6c8 DS |
2415 | * so no other readers or writers of iml or its sflist |
2416 | */ | |
cfcabdcc | 2417 | if (!iml->sflist) { |
1da177e4 LT |
2418 | /* any-source empty exclude case */ |
2419 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2420 | } | |
2421 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2422 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2423 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2424 | iml->sflist = NULL; | |
2425 | return err; | |
2426 | } | |
2427 | ||
2428 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2429 | { | |
6c567b78 | 2430 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2431 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2432 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2433 | ICMPV6_MGM_REDUCTION); | |
2434 | } else { | |
2435 | mld_add_delrec(ma->idev, ma); | |
2436 | mld_ifc_event(ma->idev); | |
2437 | } | |
2438 | } | |
2439 | ||
e99e88a9 | 2440 | static void mld_gq_timer_expire(struct timer_list *t) |
1da177e4 | 2441 | { |
e99e88a9 | 2442 | struct inet6_dev *idev = from_timer(idev, t, mc_gq_timer); |
1da177e4 LT |
2443 | |
2444 | idev->mc_gq_running = 0; | |
2445 | mld_send_report(idev, NULL); | |
9260d3e1 | 2446 | in6_dev_put(idev); |
1da177e4 LT |
2447 | } |
2448 | ||
e99e88a9 | 2449 | static void mld_ifc_timer_expire(struct timer_list *t) |
1da177e4 | 2450 | { |
e99e88a9 | 2451 | struct inet6_dev *idev = from_timer(idev, t, mc_ifc_timer); |
1da177e4 LT |
2452 | |
2453 | mld_send_cr(idev); | |
2454 | if (idev->mc_ifc_count) { | |
2455 | idev->mc_ifc_count--; | |
2456 | if (idev->mc_ifc_count) | |
2457 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2458 | } | |
9260d3e1 | 2459 | in6_dev_put(idev); |
1da177e4 LT |
2460 | } |
2461 | ||
2462 | static void mld_ifc_event(struct inet6_dev *idev) | |
2463 | { | |
6c567b78 | 2464 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2465 | return; |
2466 | idev->mc_ifc_count = idev->mc_qrv; | |
2467 | mld_ifc_start_timer(idev, 1); | |
2468 | } | |
2469 | ||
e99e88a9 | 2470 | static void igmp6_timer_handler(struct timer_list *t) |
1da177e4 | 2471 | { |
e99e88a9 | 2472 | struct ifmcaddr6 *ma = from_timer(ma, t, mca_timer); |
1da177e4 | 2473 | |
6c567b78 | 2474 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2475 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2476 | else | |
2477 | mld_send_report(ma->idev, ma); | |
2478 | ||
2479 | spin_lock(&ma->mca_lock); | |
2480 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2481 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2482 | spin_unlock(&ma->mca_lock); | |
2483 | ma_put(ma); | |
2484 | } | |
2485 | ||
75c78500 MS |
2486 | /* Device changing type */ |
2487 | ||
2488 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2489 | { | |
2490 | struct ifmcaddr6 *i; | |
2491 | ||
2492 | /* Install multicast list, except for all-nodes (already installed) */ | |
2493 | ||
2494 | read_lock_bh(&idev->lock); | |
2495 | for (i = idev->mc_list; i; i = i->next) | |
2496 | igmp6_group_dropped(i); | |
2497 | read_unlock_bh(&idev->lock); | |
2498 | } | |
2499 | ||
2500 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2501 | { | |
2502 | ipv6_mc_up(idev); | |
2503 | } | |
2504 | ||
1da177e4 LT |
2505 | /* Device going down */ |
2506 | ||
2507 | void ipv6_mc_down(struct inet6_dev *idev) | |
2508 | { | |
2509 | struct ifmcaddr6 *i; | |
2510 | ||
2511 | /* Withdraw multicast list */ | |
2512 | ||
2513 | read_lock_bh(&idev->lock); | |
1da177e4 | 2514 | |
67ba4152 | 2515 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 | 2516 | igmp6_group_dropped(i); |
1da177e4 | 2517 | |
1666d49e HL |
2518 | /* Should stop timer after group drop. or we will |
2519 | * start timer again in mld_ifc_event() | |
2520 | */ | |
2521 | mld_ifc_stop_timer(idev); | |
2522 | mld_gq_stop_timer(idev); | |
2523 | mld_dad_stop_timer(idev); | |
2524 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2525 | } |
2526 | ||
2f711939 HFS |
2527 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2528 | { | |
2529 | idev->mc_qrv = sysctl_mld_qrv; | |
2530 | idev->mc_qi = MLD_QI_DEFAULT; | |
2531 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2532 | idev->mc_v1_seen = 0; | |
2533 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2534 | } | |
1da177e4 LT |
2535 | |
2536 | /* Device going up */ | |
2537 | ||
2538 | void ipv6_mc_up(struct inet6_dev *idev) | |
2539 | { | |
2540 | struct ifmcaddr6 *i; | |
2541 | ||
2542 | /* Install multicast list, except for all-nodes (already installed) */ | |
2543 | ||
2544 | read_lock_bh(&idev->lock); | |
2f711939 | 2545 | ipv6_mc_reset(idev); |
1666d49e HL |
2546 | for (i = idev->mc_list; i; i = i->next) { |
2547 | mld_del_delrec(idev, i); | |
1da177e4 | 2548 | igmp6_group_added(i); |
1666d49e | 2549 | } |
1da177e4 LT |
2550 | read_unlock_bh(&idev->lock); |
2551 | } | |
2552 | ||
2553 | /* IPv6 device initialization. */ | |
2554 | ||
2555 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2556 | { | |
1da177e4 | 2557 | write_lock_bh(&idev->lock); |
6457d26b | 2558 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2559 | idev->mc_gq_running = 0; |
e99e88a9 | 2560 | timer_setup(&idev->mc_gq_timer, mld_gq_timer_expire, 0); |
1da177e4 LT |
2561 | idev->mc_tomb = NULL; |
2562 | idev->mc_ifc_count = 0; | |
e99e88a9 KC |
2563 | timer_setup(&idev->mc_ifc_timer, mld_ifc_timer_expire, 0); |
2564 | timer_setup(&idev->mc_dad_timer, mld_dad_timer_expire, 0); | |
2f711939 | 2565 | ipv6_mc_reset(idev); |
1da177e4 | 2566 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2567 | } |
2568 | ||
2569 | /* | |
2570 | * Device is about to be destroyed: clean up. | |
2571 | */ | |
2572 | ||
2573 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2574 | { | |
2575 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2576 | |
2577 | /* Deactivate timers */ | |
2578 | ipv6_mc_down(idev); | |
1666d49e | 2579 | mld_clear_delrec(idev); |
1da177e4 LT |
2580 | |
2581 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2582 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2583 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2584 | * fail. | |
2585 | */ | |
f3ee4010 | 2586 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2587 | |
f3ee4010 YH |
2588 | if (idev->cnf.forwarding) |
2589 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2590 | |
2591 | write_lock_bh(&idev->lock); | |
2592 | while ((i = idev->mc_list) != NULL) { | |
2593 | idev->mc_list = i->next; | |
1da177e4 | 2594 | |
1666d49e | 2595 | write_unlock_bh(&idev->lock); |
1da177e4 | 2596 | ma_put(i); |
1da177e4 LT |
2597 | write_lock_bh(&idev->lock); |
2598 | } | |
2599 | write_unlock_bh(&idev->lock); | |
2600 | } | |
2601 | ||
382ed724 VY |
2602 | static void ipv6_mc_rejoin_groups(struct inet6_dev *idev) |
2603 | { | |
2604 | struct ifmcaddr6 *pmc; | |
2605 | ||
2606 | ASSERT_RTNL(); | |
2607 | ||
2608 | if (mld_in_v1_mode(idev)) { | |
2609 | read_lock_bh(&idev->lock); | |
2610 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) | |
2611 | igmp6_join_group(pmc); | |
2612 | read_unlock_bh(&idev->lock); | |
2613 | } else | |
2614 | mld_send_report(idev, NULL); | |
2615 | } | |
2616 | ||
2617 | static int ipv6_mc_netdev_event(struct notifier_block *this, | |
2618 | unsigned long event, | |
2619 | void *ptr) | |
2620 | { | |
2621 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
2622 | struct inet6_dev *idev = __in6_dev_get(dev); | |
2623 | ||
2624 | switch (event) { | |
2625 | case NETDEV_RESEND_IGMP: | |
2626 | if (idev) | |
2627 | ipv6_mc_rejoin_groups(idev); | |
2628 | break; | |
2629 | default: | |
2630 | break; | |
2631 | } | |
2632 | ||
2633 | return NOTIFY_DONE; | |
2634 | } | |
2635 | ||
2636 | static struct notifier_block igmp6_netdev_notifier = { | |
2637 | .notifier_call = ipv6_mc_netdev_event, | |
2638 | }; | |
2639 | ||
1da177e4 LT |
2640 | #ifdef CONFIG_PROC_FS |
2641 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2642 | struct seq_net_private p; |
1da177e4 LT |
2643 | struct net_device *dev; |
2644 | struct inet6_dev *idev; | |
2645 | }; | |
2646 | ||
2647 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2648 | ||
2649 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2650 | { | |
2651 | struct ifmcaddr6 *im = NULL; | |
2652 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2653 | struct net *net = seq_file_net(seq); |
1da177e4 | 2654 | |
7562f876 | 2655 | state->idev = NULL; |
ce81b76a | 2656 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2657 | struct inet6_dev *idev; |
ce81b76a | 2658 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2659 | if (!idev) |
2660 | continue; | |
2661 | read_lock_bh(&idev->lock); | |
2662 | im = idev->mc_list; | |
2663 | if (im) { | |
2664 | state->idev = idev; | |
2665 | break; | |
2666 | } | |
2667 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2668 | } |
2669 | return im; | |
2670 | } | |
2671 | ||
2672 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2673 | { | |
2674 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2675 | ||
2676 | im = im->next; | |
2677 | while (!im) { | |
53b24b8f | 2678 | if (likely(state->idev)) |
1da177e4 | 2679 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2680 | |
2681 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2682 | if (!state->dev) { |
2683 | state->idev = NULL; | |
2684 | break; | |
2685 | } | |
ce81b76a | 2686 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2687 | if (!state->idev) |
2688 | continue; | |
2689 | read_lock_bh(&state->idev->lock); | |
2690 | im = state->idev->mc_list; | |
2691 | } | |
2692 | return im; | |
2693 | } | |
2694 | ||
2695 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2696 | { | |
2697 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2698 | if (im) | |
2699 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2700 | --pos; | |
2701 | return pos ? NULL : im; | |
2702 | } | |
2703 | ||
2704 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2705 | __acquires(RCU) |
1da177e4 | 2706 | { |
ce81b76a | 2707 | rcu_read_lock(); |
1da177e4 LT |
2708 | return igmp6_mc_get_idx(seq, *pos); |
2709 | } | |
2710 | ||
2711 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2712 | { | |
ce81b76a ED |
2713 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2714 | ||
1da177e4 LT |
2715 | ++*pos; |
2716 | return im; | |
2717 | } | |
2718 | ||
2719 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2720 | __releases(RCU) |
1da177e4 LT |
2721 | { |
2722 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2723 | |
53b24b8f | 2724 | if (likely(state->idev)) { |
1da177e4 | 2725 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2726 | state->idev = NULL; |
2727 | } | |
2728 | state->dev = NULL; | |
ce81b76a | 2729 | rcu_read_unlock(); |
1da177e4 LT |
2730 | } |
2731 | ||
2732 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2733 | { | |
2734 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2735 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2736 | ||
2737 | seq_printf(seq, | |
4b7a4274 | 2738 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2739 | state->dev->ifindex, state->dev->name, |
b071195d | 2740 | &im->mca_addr, |
1da177e4 LT |
2741 | im->mca_users, im->mca_flags, |
2742 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2743 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2744 | return 0; | |
2745 | } | |
2746 | ||
56b3d975 | 2747 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2748 | .start = igmp6_mc_seq_start, |
2749 | .next = igmp6_mc_seq_next, | |
2750 | .stop = igmp6_mc_seq_stop, | |
2751 | .show = igmp6_mc_seq_show, | |
2752 | }; | |
2753 | ||
2754 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2755 | { | |
b8ad0cbc DL |
2756 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2757 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2758 | } |
2759 | ||
9a32144e | 2760 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2761 | .owner = THIS_MODULE, |
2762 | .open = igmp6_mc_seq_open, | |
2763 | .read = seq_read, | |
2764 | .llseek = seq_lseek, | |
b8ad0cbc | 2765 | .release = seq_release_net, |
1da177e4 LT |
2766 | }; |
2767 | ||
2768 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2769 | struct seq_net_private p; |
1da177e4 LT |
2770 | struct net_device *dev; |
2771 | struct inet6_dev *idev; | |
2772 | struct ifmcaddr6 *im; | |
2773 | }; | |
2774 | ||
2775 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2776 | ||
2777 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2778 | { | |
2779 | struct ip6_sf_list *psf = NULL; | |
2780 | struct ifmcaddr6 *im = NULL; | |
2781 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2782 | struct net *net = seq_file_net(seq); |
1da177e4 | 2783 | |
7562f876 PE |
2784 | state->idev = NULL; |
2785 | state->im = NULL; | |
ce81b76a | 2786 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2787 | struct inet6_dev *idev; |
ce81b76a | 2788 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2789 | if (unlikely(idev == NULL)) |
2790 | continue; | |
2791 | read_lock_bh(&idev->lock); | |
2792 | im = idev->mc_list; | |
53b24b8f | 2793 | if (likely(im)) { |
1da177e4 LT |
2794 | spin_lock_bh(&im->mca_lock); |
2795 | psf = im->mca_sources; | |
53b24b8f | 2796 | if (likely(psf)) { |
1da177e4 LT |
2797 | state->im = im; |
2798 | state->idev = idev; | |
2799 | break; | |
2800 | } | |
2801 | spin_unlock_bh(&im->mca_lock); | |
2802 | } | |
2803 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2804 | } |
2805 | return psf; | |
2806 | } | |
2807 | ||
2808 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2809 | { | |
2810 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2811 | ||
2812 | psf = psf->sf_next; | |
2813 | while (!psf) { | |
2814 | spin_unlock_bh(&state->im->mca_lock); | |
2815 | state->im = state->im->next; | |
2816 | while (!state->im) { | |
53b24b8f | 2817 | if (likely(state->idev)) |
1da177e4 | 2818 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2819 | |
2820 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2821 | if (!state->dev) { |
2822 | state->idev = NULL; | |
2823 | goto out; | |
2824 | } | |
ce81b76a | 2825 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2826 | if (!state->idev) |
2827 | continue; | |
2828 | read_lock_bh(&state->idev->lock); | |
2829 | state->im = state->idev->mc_list; | |
2830 | } | |
2831 | if (!state->im) | |
2832 | break; | |
2833 | spin_lock_bh(&state->im->mca_lock); | |
2834 | psf = state->im->mca_sources; | |
2835 | } | |
2836 | out: | |
2837 | return psf; | |
2838 | } | |
2839 | ||
2840 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2841 | { | |
2842 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2843 | if (psf) | |
2844 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2845 | --pos; | |
2846 | return pos ? NULL : psf; | |
2847 | } | |
2848 | ||
2849 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2850 | __acquires(RCU) |
1da177e4 | 2851 | { |
ce81b76a | 2852 | rcu_read_lock(); |
1da177e4 LT |
2853 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2854 | } | |
2855 | ||
2856 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2857 | { | |
2858 | struct ip6_sf_list *psf; | |
2859 | if (v == SEQ_START_TOKEN) | |
2860 | psf = igmp6_mcf_get_first(seq); | |
2861 | else | |
2862 | psf = igmp6_mcf_get_next(seq, v); | |
2863 | ++*pos; | |
2864 | return psf; | |
2865 | } | |
2866 | ||
2867 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2868 | __releases(RCU) |
1da177e4 LT |
2869 | { |
2870 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
53b24b8f | 2871 | if (likely(state->im)) { |
1da177e4 LT |
2872 | spin_unlock_bh(&state->im->mca_lock); |
2873 | state->im = NULL; | |
2874 | } | |
53b24b8f | 2875 | if (likely(state->idev)) { |
1da177e4 | 2876 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2877 | state->idev = NULL; |
2878 | } | |
2879 | state->dev = NULL; | |
ce81b76a | 2880 | rcu_read_unlock(); |
1da177e4 LT |
2881 | } |
2882 | ||
2883 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2884 | { | |
2885 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2886 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2887 | ||
2888 | if (v == SEQ_START_TOKEN) { | |
1744bea1 | 2889 | seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n"); |
1da177e4 LT |
2890 | } else { |
2891 | seq_printf(seq, | |
4b7a4274 | 2892 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2893 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2894 | &state->im->mca_addr, |
2895 | &psf->sf_addr, | |
1da177e4 LT |
2896 | psf->sf_count[MCAST_INCLUDE], |
2897 | psf->sf_count[MCAST_EXCLUDE]); | |
2898 | } | |
2899 | return 0; | |
2900 | } | |
2901 | ||
56b3d975 | 2902 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2903 | .start = igmp6_mcf_seq_start, |
2904 | .next = igmp6_mcf_seq_next, | |
2905 | .stop = igmp6_mcf_seq_stop, | |
2906 | .show = igmp6_mcf_seq_show, | |
2907 | }; | |
2908 | ||
2909 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2910 | { | |
b8ad0cbc DL |
2911 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2912 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2913 | } |
2914 | ||
9a32144e | 2915 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2916 | .owner = THIS_MODULE, |
2917 | .open = igmp6_mcf_seq_open, | |
2918 | .read = seq_read, | |
2919 | .llseek = seq_lseek, | |
b8ad0cbc | 2920 | .release = seq_release_net, |
1da177e4 | 2921 | }; |
ea82edf7 | 2922 | |
2c8c1e72 | 2923 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2924 | { |
2925 | int err; | |
2926 | ||
2927 | err = -ENOMEM; | |
d4beaa66 | 2928 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2929 | goto out; |
d4beaa66 G |
2930 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2931 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2932 | goto out_proc_net_igmp6; |
2933 | ||
2934 | err = 0; | |
2935 | out: | |
2936 | return err; | |
2937 | ||
2938 | out_proc_net_igmp6: | |
ece31ffd | 2939 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2940 | goto out; |
2941 | } | |
2942 | ||
2c8c1e72 | 2943 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2944 | { |
ece31ffd G |
2945 | remove_proc_entry("mcfilter6", net->proc_net); |
2946 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2947 | } |
2948 | #else | |
2c8c1e72 | 2949 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2950 | { |
2951 | return 0; | |
2952 | } | |
2c8c1e72 | 2953 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2954 | { |
ea82edf7 | 2955 | } |
1da177e4 LT |
2956 | #endif |
2957 | ||
2c8c1e72 | 2958 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2959 | { |
1da177e4 LT |
2960 | int err; |
2961 | ||
1ed8516f DL |
2962 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2963 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2964 | if (err < 0) { |
f3213831 | 2965 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2966 | err); |
b8ad0cbc | 2967 | goto out; |
1da177e4 LT |
2968 | } |
2969 | ||
1ed8516f | 2970 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2971 | |
93a714d6 MC |
2972 | err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6, |
2973 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
2974 | if (err < 0) { | |
2975 | pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n", | |
2976 | err); | |
2977 | goto out_sock_create; | |
2978 | } | |
2979 | ||
ea82edf7 DL |
2980 | err = igmp6_proc_init(net); |
2981 | if (err) | |
93a714d6 MC |
2982 | goto out_sock_create_autojoin; |
2983 | ||
2984 | return 0; | |
b8ad0cbc | 2985 | |
93a714d6 MC |
2986 | out_sock_create_autojoin: |
2987 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); | |
b8ad0cbc | 2988 | out_sock_create: |
1ed8516f | 2989 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 MC |
2990 | out: |
2991 | return err; | |
1da177e4 LT |
2992 | } |
2993 | ||
2c8c1e72 | 2994 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2995 | { |
1ed8516f | 2996 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 | 2997 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); |
ea82edf7 | 2998 | igmp6_proc_exit(net); |
1da177e4 | 2999 | } |
b8ad0cbc DL |
3000 | |
3001 | static struct pernet_operations igmp6_net_ops = { | |
3002 | .init = igmp6_net_init, | |
3003 | .exit = igmp6_net_exit, | |
3004 | }; | |
3005 | ||
3006 | int __init igmp6_init(void) | |
3007 | { | |
3008 | return register_pernet_subsys(&igmp6_net_ops); | |
3009 | } | |
3010 | ||
382ed724 VY |
3011 | int __init igmp6_late_init(void) |
3012 | { | |
3013 | return register_netdevice_notifier(&igmp6_netdev_notifier); | |
3014 | } | |
3015 | ||
b8ad0cbc DL |
3016 | void igmp6_cleanup(void) |
3017 | { | |
3018 | unregister_pernet_subsys(&igmp6_net_ops); | |
3019 | } | |
382ed724 VY |
3020 | |
3021 | void igmp6_late_cleanup(void) | |
3022 | { | |
3023 | unregister_netdevice_notifier(&igmp6_netdev_notifier); | |
3024 | } |