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Commit | Line | Data |
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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 | 67 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
32b395a1 MY |
68 | static int __mld2_query_bugs[] __attribute__((__unused__)) = { |
69 | BUILD_BUG_ON_ZERO(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
70 | BUILD_BUG_ON_ZERO(offsetof(struct mld2_report, mld2r_grec) % 4), | |
71 | BUILD_BUG_ON_ZERO(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); | |
c7ea20c9 HL |
98 | static int __ipv6_dev_mc_inc(struct net_device *dev, |
99 | const struct in6_addr *addr, unsigned int mode); | |
1da177e4 | 100 | |
1da177e4 | 101 | #define MLD_QRV_DEFAULT 2 |
89225d1c DB |
102 | /* RFC3810, 9.2. Query Interval */ |
103 | #define MLD_QI_DEFAULT (125 * HZ) | |
104 | /* RFC3810, 9.3. Query Response Interval */ | |
105 | #define MLD_QRI_DEFAULT (10 * HZ) | |
1da177e4 | 106 | |
9fd07841 DB |
107 | /* RFC3810, 8.1 Query Version Distinctions */ |
108 | #define MLD_V1_QUERY_LEN 24 | |
109 | #define MLD_V2_QUERY_LEN_MIN 28 | |
110 | ||
6f4353d8 | 111 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 112 | |
ab32ea5d | 113 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
2f711939 | 114 | int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT; |
1da177e4 LT |
115 | |
116 | /* | |
117 | * socket join on multicast group | |
118 | */ | |
119 | ||
456b61bc ED |
120 | #define for_each_pmc_rcu(np, pmc) \ |
121 | for (pmc = rcu_dereference(np->ipv6_mc_list); \ | |
122 | pmc != NULL; \ | |
123 | pmc = rcu_dereference(pmc->next)) | |
124 | ||
fc4eba58 HFS |
125 | static int unsolicited_report_interval(struct inet6_dev *idev) |
126 | { | |
127 | int iv; | |
128 | ||
6c567b78 | 129 | if (mld_in_v1_mode(idev)) |
fc4eba58 HFS |
130 | iv = idev->cnf.mldv1_unsolicited_report_interval; |
131 | else | |
132 | iv = idev->cnf.mldv2_unsolicited_report_interval; | |
133 | ||
134 | return iv > 0 ? iv : 1; | |
135 | } | |
136 | ||
c7ea20c9 HL |
137 | static int __ipv6_sock_mc_join(struct sock *sk, int ifindex, |
138 | const struct in6_addr *addr, unsigned int mode) | |
1da177e4 LT |
139 | { |
140 | struct net_device *dev = NULL; | |
141 | struct ipv6_mc_socklist *mc_lst; | |
142 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 143 | struct net *net = sock_net(sk); |
1da177e4 LT |
144 | int err; |
145 | ||
46a4dee0 MC |
146 | ASSERT_RTNL(); |
147 | ||
1da177e4 LT |
148 | if (!ipv6_addr_is_multicast(addr)) |
149 | return -EINVAL; | |
150 | ||
456b61bc ED |
151 | rcu_read_lock(); |
152 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
153 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
154 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 155 | rcu_read_unlock(); |
c9e3e8b6 DS |
156 | return -EADDRINUSE; |
157 | } | |
158 | } | |
456b61bc | 159 | rcu_read_unlock(); |
c9e3e8b6 | 160 | |
1da177e4 LT |
161 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
162 | ||
63159f29 | 163 | if (!mc_lst) |
1da177e4 LT |
164 | return -ENOMEM; |
165 | ||
166 | mc_lst->next = NULL; | |
4e3fd7a0 | 167 | mc_lst->addr = *addr; |
1da177e4 LT |
168 | |
169 | if (ifindex == 0) { | |
170 | struct rt6_info *rt; | |
b75cc8f9 | 171 | rt = rt6_lookup(net, addr, NULL, 0, NULL, 0); |
1da177e4 | 172 | if (rt) { |
d1918542 | 173 | dev = rt->dst.dev; |
94e187c0 | 174 | ip6_rt_put(rt); |
1da177e4 LT |
175 | } |
176 | } else | |
414b6c94 | 177 | dev = __dev_get_by_index(net, ifindex); |
1da177e4 | 178 | |
63159f29 | 179 | if (!dev) { |
1da177e4 LT |
180 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
181 | return -ENODEV; | |
182 | } | |
183 | ||
184 | mc_lst->ifindex = dev->ifindex; | |
c7ea20c9 | 185 | mc_lst->sfmode = mode; |
196433c5 | 186 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
187 | mc_lst->sflist = NULL; |
188 | ||
189 | /* | |
190 | * now add/increase the group membership on the device | |
191 | */ | |
192 | ||
c7ea20c9 | 193 | err = __ipv6_dev_mc_inc(dev, addr, mode); |
1da177e4 LT |
194 | |
195 | if (err) { | |
196 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
1da177e4 LT |
197 | return err; |
198 | } | |
199 | ||
1da177e4 | 200 | mc_lst->next = np->ipv6_mc_list; |
456b61bc | 201 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
1da177e4 | 202 | |
46a4dee0 MC |
203 | return 0; |
204 | } | |
c7ea20c9 HL |
205 | |
206 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) | |
207 | { | |
208 | return __ipv6_sock_mc_join(sk, ifindex, addr, MCAST_EXCLUDE); | |
209 | } | |
46a4dee0 | 210 | EXPORT_SYMBOL(ipv6_sock_mc_join); |
1da177e4 | 211 | |
c7ea20c9 HL |
212 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, |
213 | const struct in6_addr *addr, unsigned int mode) | |
214 | { | |
215 | return __ipv6_sock_mc_join(sk, ifindex, addr, mode); | |
216 | } | |
217 | ||
1da177e4 LT |
218 | /* |
219 | * socket leave on multicast group | |
220 | */ | |
54ff9ef3 | 221 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
222 | { |
223 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
224 | struct ipv6_mc_socklist *mc_lst; |
225 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 226 | struct net *net = sock_net(sk); |
1da177e4 | 227 | |
46a4dee0 MC |
228 | ASSERT_RTNL(); |
229 | ||
a858d64b LW |
230 | if (!ipv6_addr_is_multicast(addr)) |
231 | return -EINVAL; | |
232 | ||
456b61bc | 233 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 234 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 235 | lnk = &mc_lst->next) { |
1da177e4 LT |
236 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
237 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
238 | struct net_device *dev; | |
239 | ||
240 | *lnk = mc_lst->next; | |
1da177e4 | 241 | |
414b6c94 | 242 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
53b24b8f | 243 | if (dev) { |
96b52e61 | 244 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 245 | |
acd6e00b | 246 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 247 | if (idev) |
1da177e4 | 248 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
249 | } else |
250 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 | 251 | |
456b61bc | 252 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 253 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
254 | return 0; |
255 | } | |
256 | } | |
1da177e4 | 257 | |
9951f036 | 258 | return -EADDRNOTAVAIL; |
1da177e4 | 259 | } |
46a4dee0 | 260 | EXPORT_SYMBOL(ipv6_sock_mc_drop); |
1da177e4 | 261 | |
96b52e61 ED |
262 | /* called with rcu_read_lock() */ |
263 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 264 | const struct in6_addr *group, |
96b52e61 | 265 | int ifindex) |
1da177e4 LT |
266 | { |
267 | struct net_device *dev = NULL; | |
268 | struct inet6_dev *idev = NULL; | |
269 | ||
270 | if (ifindex == 0) { | |
b75cc8f9 | 271 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, NULL, 0); |
1da177e4 | 272 | |
1da177e4 | 273 | if (rt) { |
d1918542 | 274 | dev = rt->dst.dev; |
94e187c0 | 275 | ip6_rt_put(rt); |
1da177e4 LT |
276 | } |
277 | } else | |
96b52e61 | 278 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
279 | |
280 | if (!dev) | |
96b52e61 ED |
281 | return NULL; |
282 | idev = __in6_dev_get(dev); | |
448eb71f | 283 | if (!idev) |
8a22c99a | 284 | return NULL; |
1da177e4 | 285 | read_lock_bh(&idev->lock); |
96b52e61 ED |
286 | if (idev->dead) { |
287 | read_unlock_bh(&idev->lock); | |
288 | return NULL; | |
289 | } | |
1da177e4 LT |
290 | return idev; |
291 | } | |
292 | ||
8651be8f | 293 | void __ipv6_sock_mc_close(struct sock *sk) |
1da177e4 LT |
294 | { |
295 | struct ipv6_pinfo *np = inet6_sk(sk); | |
296 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 297 | struct net *net = sock_net(sk); |
1da177e4 | 298 | |
8651be8f | 299 | ASSERT_RTNL(); |
0e1efe9d | 300 | |
b5350916 | 301 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
302 | struct net_device *dev; |
303 | ||
304 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 305 | |
414b6c94 | 306 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 307 | if (dev) { |
96b52e61 | 308 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 309 | |
acd6e00b | 310 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 311 | if (idev) |
1da177e4 | 312 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
313 | } else |
314 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 315 | |
456b61bc | 316 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 317 | kfree_rcu(mc_lst, rcu); |
1da177e4 | 318 | } |
8651be8f WC |
319 | } |
320 | ||
321 | void ipv6_sock_mc_close(struct sock *sk) | |
322 | { | |
323 | struct ipv6_pinfo *np = inet6_sk(sk); | |
324 | ||
325 | if (!rcu_access_pointer(np->ipv6_mc_list)) | |
326 | return; | |
327 | rtnl_lock(); | |
328 | __ipv6_sock_mc_close(sk); | |
a9ed4a29 | 329 | rtnl_unlock(); |
1da177e4 LT |
330 | } |
331 | ||
332 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
333 | struct group_source_req *pgsr) | |
334 | { | |
335 | struct in6_addr *source, *group; | |
336 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
337 | struct inet6_dev *idev; |
338 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
339 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 340 | struct net *net = sock_net(sk); |
1da177e4 | 341 | int i, j, rv; |
c9e3e8b6 | 342 | int leavegroup = 0; |
5ab4a6c8 | 343 | int pmclocked = 0; |
1da177e4 LT |
344 | int err; |
345 | ||
1da177e4 LT |
346 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
347 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
348 | ||
349 | if (!ipv6_addr_is_multicast(group)) | |
350 | return -EINVAL; | |
351 | ||
96b52e61 ED |
352 | rcu_read_lock(); |
353 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
354 | if (!idev) { | |
355 | rcu_read_unlock(); | |
1da177e4 | 356 | return -ENODEV; |
96b52e61 | 357 | } |
1da177e4 LT |
358 | |
359 | err = -EADDRNOTAVAIL; | |
360 | ||
456b61bc | 361 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
362 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
363 | continue; | |
364 | if (ipv6_addr_equal(&pmc->addr, group)) | |
365 | break; | |
366 | } | |
917f2f10 DS |
367 | if (!pmc) { /* must have a prior join */ |
368 | err = -EINVAL; | |
1da177e4 | 369 | goto done; |
917f2f10 | 370 | } |
1da177e4 LT |
371 | /* if a source filter was set, must be the same mode as before */ |
372 | if (pmc->sflist) { | |
917f2f10 DS |
373 | if (pmc->sfmode != omode) { |
374 | err = -EINVAL; | |
1da177e4 | 375 | goto done; |
917f2f10 | 376 | } |
1da177e4 LT |
377 | } else if (pmc->sfmode != omode) { |
378 | /* allow mode switches for empty-set filters */ | |
379 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
380 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
381 | pmc->sfmode = omode; | |
382 | } | |
383 | ||
96b52e61 | 384 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
385 | pmclocked = 1; |
386 | ||
1da177e4 LT |
387 | psl = pmc->sflist; |
388 | if (!add) { | |
389 | if (!psl) | |
917f2f10 | 390 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 391 | rv = !0; |
67ba4152 | 392 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 393 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
394 | if (rv == 0) |
395 | break; | |
396 | } | |
397 | if (rv) /* source not found */ | |
917f2f10 | 398 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 399 | |
c9e3e8b6 DS |
400 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
401 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
402 | leavegroup = 1; | |
403 | goto done; | |
404 | } | |
405 | ||
1da177e4 LT |
406 | /* update the interface filter */ |
407 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
408 | ||
67ba4152 | 409 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
410 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
411 | psl->sl_count--; | |
412 | err = 0; | |
413 | goto done; | |
414 | } | |
415 | /* else, add a new source to the filter */ | |
416 | ||
417 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
418 | err = -ENOBUFS; | |
419 | goto done; | |
420 | } | |
421 | if (!psl || psl->sl_count == psl->sl_max) { | |
422 | struct ip6_sf_socklist *newpsl; | |
423 | int count = IP6_SFBLOCK; | |
424 | ||
425 | if (psl) | |
426 | count += psl->sl_max; | |
8b3a7005 | 427 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
428 | if (!newpsl) { |
429 | err = -ENOBUFS; | |
430 | goto done; | |
431 | } | |
432 | newpsl->sl_max = count; | |
433 | newpsl->sl_count = count - IP6_SFBLOCK; | |
434 | if (psl) { | |
67ba4152 | 435 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
436 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
437 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
438 | } | |
439 | pmc->sflist = psl = newpsl; | |
440 | } | |
441 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 442 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 443 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
444 | if (rv == 0) /* There is an error in the address. */ |
445 | goto done; | |
1da177e4 | 446 | } |
67ba4152 | 447 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
448 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
449 | psl->sl_addr[i] = *source; | |
450 | psl->sl_count++; | |
451 | err = 0; | |
452 | /* update the interface list */ | |
453 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
454 | done: | |
5ab4a6c8 | 455 | if (pmclocked) |
96b52e61 | 456 | write_unlock(&pmc->sflock); |
1da177e4 | 457 | read_unlock_bh(&idev->lock); |
96b52e61 | 458 | rcu_read_unlock(); |
c9e3e8b6 | 459 | if (leavegroup) |
54ff9ef3 | 460 | err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); |
1da177e4 LT |
461 | return err; |
462 | } | |
463 | ||
464 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
465 | { | |
b71d1d42 | 466 | const struct in6_addr *group; |
1da177e4 | 467 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
468 | struct inet6_dev *idev; |
469 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
470 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 471 | struct net *net = sock_net(sk); |
9951f036 | 472 | int leavegroup = 0; |
1da177e4 LT |
473 | int i, err; |
474 | ||
475 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
476 | ||
477 | if (!ipv6_addr_is_multicast(group)) | |
478 | return -EINVAL; | |
479 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
480 | gsf->gf_fmode != MCAST_EXCLUDE) | |
481 | return -EINVAL; | |
482 | ||
96b52e61 ED |
483 | rcu_read_lock(); |
484 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 485 | |
96b52e61 ED |
486 | if (!idev) { |
487 | rcu_read_unlock(); | |
1da177e4 | 488 | return -ENODEV; |
96b52e61 | 489 | } |
1da177e4 | 490 | |
9c05989b | 491 | err = 0; |
5ab4a6c8 | 492 | |
9951f036 DS |
493 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
494 | leavegroup = 1; | |
495 | goto done; | |
496 | } | |
497 | ||
456b61bc | 498 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
499 | if (pmc->ifindex != gsf->gf_interface) |
500 | continue; | |
501 | if (ipv6_addr_equal(&pmc->addr, group)) | |
502 | break; | |
503 | } | |
917f2f10 DS |
504 | if (!pmc) { /* must have a prior join */ |
505 | err = -EINVAL; | |
1da177e4 | 506 | goto done; |
917f2f10 | 507 | } |
1da177e4 | 508 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
509 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
510 | GFP_ATOMIC); | |
1da177e4 LT |
511 | if (!newpsl) { |
512 | err = -ENOBUFS; | |
513 | goto done; | |
514 | } | |
515 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 516 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
517 | struct sockaddr_in6 *psin6; |
518 | ||
519 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
520 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
521 | } | |
522 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
523 | newpsl->sl_count, newpsl->sl_addr, 0); | |
524 | if (err) { | |
525 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
526 | goto done; | |
527 | } | |
8713dbf0 | 528 | } else { |
1da177e4 | 529 | newpsl = NULL; |
8713dbf0 YZ |
530 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
531 | } | |
5ab4a6c8 | 532 | |
96b52e61 | 533 | write_lock(&pmc->sflock); |
1da177e4 LT |
534 | psl = pmc->sflist; |
535 | if (psl) { | |
536 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
537 | psl->sl_count, psl->sl_addr, 0); | |
538 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
539 | } else | |
540 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
541 | pmc->sflist = newpsl; | |
542 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 543 | write_unlock(&pmc->sflock); |
917f2f10 | 544 | err = 0; |
1da177e4 LT |
545 | done: |
546 | read_unlock_bh(&idev->lock); | |
96b52e61 | 547 | rcu_read_unlock(); |
9951f036 DS |
548 | if (leavegroup) |
549 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
550 | return err; |
551 | } | |
552 | ||
553 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
554 | struct group_filter __user *optval, int __user *optlen) | |
555 | { | |
556 | int err, i, count, copycount; | |
b71d1d42 | 557 | const struct in6_addr *group; |
1da177e4 LT |
558 | struct ipv6_mc_socklist *pmc; |
559 | struct inet6_dev *idev; | |
1da177e4 LT |
560 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
561 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 562 | struct net *net = sock_net(sk); |
1da177e4 LT |
563 | |
564 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
565 | ||
566 | if (!ipv6_addr_is_multicast(group)) | |
567 | return -EINVAL; | |
568 | ||
96b52e61 ED |
569 | rcu_read_lock(); |
570 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 571 | |
96b52e61 ED |
572 | if (!idev) { |
573 | rcu_read_unlock(); | |
1da177e4 | 574 | return -ENODEV; |
96b52e61 | 575 | } |
1da177e4 LT |
576 | |
577 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
578 | /* changes to the ipv6_mc_list require the socket lock and |
579 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
580 | * so reading the list is safe. |
581 | */ | |
1da177e4 | 582 | |
456b61bc | 583 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
584 | if (pmc->ifindex != gsf->gf_interface) |
585 | continue; | |
586 | if (ipv6_addr_equal(group, &pmc->addr)) | |
587 | break; | |
588 | } | |
589 | if (!pmc) /* must have a prior join */ | |
590 | goto done; | |
591 | gsf->gf_fmode = pmc->sfmode; | |
592 | psl = pmc->sflist; | |
593 | count = psl ? psl->sl_count : 0; | |
594 | read_unlock_bh(&idev->lock); | |
96b52e61 | 595 | rcu_read_unlock(); |
1da177e4 LT |
596 | |
597 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
598 | gsf->gf_numsrc = count; | |
599 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
600 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
601 | return -EFAULT; | |
602 | } | |
f7ed925c WC |
603 | /* changes to psl require the socket lock, and a write lock |
604 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 605 | */ |
67ba4152 | 606 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
607 | struct sockaddr_in6 *psin6; |
608 | struct sockaddr_storage ss; | |
609 | ||
610 | psin6 = (struct sockaddr_in6 *)&ss; | |
611 | memset(&ss, 0, sizeof(ss)); | |
612 | psin6->sin6_family = AF_INET6; | |
613 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 614 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
615 | return -EFAULT; |
616 | } | |
617 | return 0; | |
618 | done: | |
619 | read_unlock_bh(&idev->lock); | |
96b52e61 | 620 | rcu_read_unlock(); |
1da177e4 LT |
621 | return err; |
622 | } | |
623 | ||
a50feda5 ED |
624 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
625 | const struct in6_addr *src_addr) | |
1da177e4 LT |
626 | { |
627 | struct ipv6_pinfo *np = inet6_sk(sk); | |
628 | struct ipv6_mc_socklist *mc; | |
629 | struct ip6_sf_socklist *psl; | |
a50feda5 | 630 | bool rv = true; |
1da177e4 | 631 | |
456b61bc ED |
632 | rcu_read_lock(); |
633 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
634 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
635 | break; | |
636 | } | |
637 | if (!mc) { | |
456b61bc | 638 | rcu_read_unlock(); |
15033f04 | 639 | return np->mc_all; |
1da177e4 | 640 | } |
5ab4a6c8 | 641 | read_lock(&mc->sflock); |
1da177e4 LT |
642 | psl = mc->sflist; |
643 | if (!psl) { | |
644 | rv = mc->sfmode == MCAST_EXCLUDE; | |
645 | } else { | |
646 | int i; | |
647 | ||
67ba4152 | 648 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
649 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
650 | break; | |
651 | } | |
652 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 653 | rv = false; |
1da177e4 | 654 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 655 | rv = false; |
1da177e4 | 656 | } |
5ab4a6c8 | 657 | read_unlock(&mc->sflock); |
456b61bc | 658 | rcu_read_unlock(); |
1da177e4 LT |
659 | |
660 | return rv; | |
661 | } | |
662 | ||
0ae0d60a | 663 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
1da177e4 LT |
664 | { |
665 | struct net_device *dev = mc->idev->dev; | |
666 | char buf[MAX_ADDR_LEN]; | |
667 | ||
ec16ef22 YH |
668 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
669 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
670 | return; | |
671 | ||
1da177e4 LT |
672 | spin_lock_bh(&mc->mca_lock); |
673 | if (!(mc->mca_flags&MAF_LOADED)) { | |
674 | mc->mca_flags |= MAF_LOADED; | |
675 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 676 | dev_mc_add(dev, buf); |
1da177e4 LT |
677 | } |
678 | spin_unlock_bh(&mc->mca_lock); | |
679 | ||
680 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
681 | return; | |
682 | ||
6c567b78 | 683 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
684 | igmp6_join_group(mc); |
685 | return; | |
686 | } | |
687 | /* else v2 */ | |
688 | ||
c7ea20c9 HL |
689 | /* Based on RFC3810 6.1, for newly added INCLUDE SSM, we |
690 | * should not send filter-mode change record as the mode | |
691 | * should be from IN() to IN(A). | |
692 | */ | |
0ae0d60a | 693 | if (mc->mca_sfmode == MCAST_EXCLUDE) |
c7ea20c9 HL |
694 | mc->mca_crcount = mc->idev->mc_qrv; |
695 | ||
1da177e4 LT |
696 | mld_ifc_event(mc->idev); |
697 | } | |
698 | ||
699 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
700 | { | |
701 | struct net_device *dev = mc->idev->dev; | |
702 | char buf[MAX_ADDR_LEN]; | |
703 | ||
ec16ef22 YH |
704 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
705 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
706 | return; | |
707 | ||
1da177e4 LT |
708 | spin_lock_bh(&mc->mca_lock); |
709 | if (mc->mca_flags&MAF_LOADED) { | |
710 | mc->mca_flags &= ~MAF_LOADED; | |
711 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 712 | dev_mc_del(dev, buf); |
1da177e4 LT |
713 | } |
714 | ||
1da177e4 | 715 | spin_unlock_bh(&mc->mca_lock); |
1666d49e HL |
716 | if (mc->mca_flags & MAF_NOREPORT) |
717 | return; | |
1da177e4 LT |
718 | |
719 | if (!mc->idev->dead) | |
720 | igmp6_leave_group(mc); | |
721 | ||
722 | spin_lock_bh(&mc->mca_lock); | |
723 | if (del_timer(&mc->mca_timer)) | |
d3981bc6 | 724 | refcount_dec(&mc->mca_refcnt); |
1da177e4 LT |
725 | spin_unlock_bh(&mc->mca_lock); |
726 | } | |
727 | ||
728 | /* | |
729 | * deleted ifmcaddr6 manipulation | |
730 | */ | |
731 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
732 | { | |
733 | struct ifmcaddr6 *pmc; | |
734 | ||
735 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
736 | * are actually used. In particular, the refcnt and users are not | |
737 | * used for management of the delete list. Using the same structure | |
738 | * for deleted items allows change reports to use common code with | |
739 | * non-deleted or query-response MCA's. | |
740 | */ | |
0c600eda | 741 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
742 | if (!pmc) |
743 | return; | |
0c600eda | 744 | |
1da177e4 LT |
745 | spin_lock_bh(&im->mca_lock); |
746 | spin_lock_init(&pmc->mca_lock); | |
747 | pmc->idev = im->idev; | |
748 | in6_dev_hold(idev); | |
749 | pmc->mca_addr = im->mca_addr; | |
750 | pmc->mca_crcount = idev->mc_qrv; | |
751 | pmc->mca_sfmode = im->mca_sfmode; | |
752 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
753 | struct ip6_sf_list *psf; | |
754 | ||
755 | pmc->mca_tomb = im->mca_tomb; | |
756 | pmc->mca_sources = im->mca_sources; | |
757 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 758 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
759 | psf->sf_crcount = pmc->mca_crcount; |
760 | } | |
761 | spin_unlock_bh(&im->mca_lock); | |
762 | ||
6457d26b | 763 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
764 | pmc->next = idev->mc_tomb; |
765 | idev->mc_tomb = pmc; | |
6457d26b | 766 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
767 | } |
768 | ||
1666d49e | 769 | static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) |
1da177e4 LT |
770 | { |
771 | struct ifmcaddr6 *pmc, *pmc_prev; | |
1666d49e HL |
772 | struct ip6_sf_list *psf; |
773 | struct in6_addr *pmca = &im->mca_addr; | |
1da177e4 | 774 | |
6457d26b | 775 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 776 | pmc_prev = NULL; |
67ba4152 | 777 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
778 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
779 | break; | |
780 | pmc_prev = pmc; | |
781 | } | |
782 | if (pmc) { | |
783 | if (pmc_prev) | |
784 | pmc_prev->next = pmc->next; | |
785 | else | |
786 | idev->mc_tomb = pmc->next; | |
787 | } | |
6457d26b SH |
788 | spin_unlock_bh(&idev->mc_lock); |
789 | ||
1666d49e | 790 | spin_lock_bh(&im->mca_lock); |
1da177e4 | 791 | if (pmc) { |
1666d49e | 792 | im->idev = pmc->idev; |
08d3ffcc | 793 | if (im->mca_sfmode == MCAST_INCLUDE) { |
1666d49e HL |
794 | im->mca_tomb = pmc->mca_tomb; |
795 | im->mca_sources = pmc->mca_sources; | |
796 | for (psf = im->mca_sources; psf; psf = psf->sf_next) | |
c7ea20c9 HL |
797 | psf->sf_crcount = idev->mc_qrv; |
798 | } else { | |
799 | im->mca_crcount = idev->mc_qrv; | |
1da177e4 LT |
800 | } |
801 | in6_dev_put(pmc->idev); | |
9c8bb163 | 802 | kfree(pmc); |
1da177e4 | 803 | } |
1666d49e | 804 | spin_unlock_bh(&im->mca_lock); |
1da177e4 LT |
805 | } |
806 | ||
807 | static void mld_clear_delrec(struct inet6_dev *idev) | |
808 | { | |
809 | struct ifmcaddr6 *pmc, *nextpmc; | |
810 | ||
6457d26b | 811 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
812 | pmc = idev->mc_tomb; |
813 | idev->mc_tomb = NULL; | |
6457d26b | 814 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
815 | |
816 | for (; pmc; pmc = nextpmc) { | |
817 | nextpmc = pmc->next; | |
818 | ip6_mc_clear_src(pmc); | |
819 | in6_dev_put(pmc->idev); | |
820 | kfree(pmc); | |
821 | } | |
822 | ||
823 | /* clear dead sources, too */ | |
824 | read_lock_bh(&idev->lock); | |
67ba4152 | 825 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
826 | struct ip6_sf_list *psf, *psf_next; |
827 | ||
828 | spin_lock_bh(&pmc->mca_lock); | |
829 | psf = pmc->mca_tomb; | |
830 | pmc->mca_tomb = NULL; | |
831 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 832 | for (; psf; psf = psf_next) { |
1da177e4 LT |
833 | psf_next = psf->sf_next; |
834 | kfree(psf); | |
835 | } | |
836 | } | |
837 | read_unlock_bh(&idev->lock); | |
838 | } | |
839 | ||
1691c63e WC |
840 | static void mca_get(struct ifmcaddr6 *mc) |
841 | { | |
d3981bc6 | 842 | refcount_inc(&mc->mca_refcnt); |
1691c63e WC |
843 | } |
844 | ||
845 | static void ma_put(struct ifmcaddr6 *mc) | |
846 | { | |
d3981bc6 | 847 | if (refcount_dec_and_test(&mc->mca_refcnt)) { |
1691c63e WC |
848 | in6_dev_put(mc->idev); |
849 | kfree(mc); | |
850 | } | |
851 | } | |
852 | ||
853 | static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev, | |
c7ea20c9 HL |
854 | const struct in6_addr *addr, |
855 | unsigned int mode) | |
1691c63e WC |
856 | { |
857 | struct ifmcaddr6 *mc; | |
858 | ||
859 | mc = kzalloc(sizeof(*mc), GFP_ATOMIC); | |
63159f29 | 860 | if (!mc) |
1691c63e WC |
861 | return NULL; |
862 | ||
e99e88a9 | 863 | timer_setup(&mc->mca_timer, igmp6_timer_handler, 0); |
1691c63e WC |
864 | |
865 | mc->mca_addr = *addr; | |
866 | mc->idev = idev; /* reference taken by caller */ | |
867 | mc->mca_users = 1; | |
868 | /* mca_stamp should be updated upon changes */ | |
869 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
d3981bc6 | 870 | refcount_set(&mc->mca_refcnt, 1); |
1691c63e WC |
871 | spin_lock_init(&mc->mca_lock); |
872 | ||
c7ea20c9 HL |
873 | mc->mca_sfmode = mode; |
874 | mc->mca_sfcount[mode] = 1; | |
1691c63e WC |
875 | |
876 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
877 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
878 | mc->mca_flags |= MAF_NOREPORT; | |
879 | ||
880 | return mc; | |
881 | } | |
1da177e4 LT |
882 | |
883 | /* | |
884 | * device multicast group inc (add if not found) | |
885 | */ | |
c7ea20c9 HL |
886 | static int __ipv6_dev_mc_inc(struct net_device *dev, |
887 | const struct in6_addr *addr, unsigned int mode) | |
1da177e4 LT |
888 | { |
889 | struct ifmcaddr6 *mc; | |
890 | struct inet6_dev *idev; | |
891 | ||
a9ed4a29 SD |
892 | ASSERT_RTNL(); |
893 | ||
96b52e61 | 894 | /* we need to take a reference on idev */ |
1da177e4 LT |
895 | idev = in6_dev_get(dev); |
896 | ||
63159f29 | 897 | if (!idev) |
1da177e4 LT |
898 | return -EINVAL; |
899 | ||
900 | write_lock_bh(&idev->lock); | |
901 | if (idev->dead) { | |
902 | write_unlock_bh(&idev->lock); | |
903 | in6_dev_put(idev); | |
904 | return -ENODEV; | |
905 | } | |
906 | ||
907 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
908 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
909 | mc->mca_users++; | |
910 | write_unlock_bh(&idev->lock); | |
c7ea20c9 | 911 | ip6_mc_add_src(idev, &mc->mca_addr, mode, 0, NULL, 0); |
1da177e4 LT |
912 | in6_dev_put(idev); |
913 | return 0; | |
914 | } | |
915 | } | |
916 | ||
c7ea20c9 | 917 | mc = mca_alloc(idev, addr, mode); |
1691c63e | 918 | if (!mc) { |
1da177e4 LT |
919 | write_unlock_bh(&idev->lock); |
920 | in6_dev_put(idev); | |
921 | return -ENOMEM; | |
922 | } | |
923 | ||
1da177e4 LT |
924 | mc->next = idev->mc_list; |
925 | idev->mc_list = mc; | |
1691c63e WC |
926 | |
927 | /* Hold this for the code below before we unlock, | |
928 | * it is already exposed via idev->mc_list. | |
929 | */ | |
930 | mca_get(mc); | |
1da177e4 LT |
931 | write_unlock_bh(&idev->lock); |
932 | ||
1666d49e | 933 | mld_del_delrec(idev, mc); |
0ae0d60a | 934 | igmp6_group_added(mc); |
1da177e4 LT |
935 | ma_put(mc); |
936 | return 0; | |
937 | } | |
938 | ||
c7ea20c9 HL |
939 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
940 | { | |
941 | return __ipv6_dev_mc_inc(dev, addr, MCAST_EXCLUDE); | |
942 | } | |
4effd28c | 943 | EXPORT_SYMBOL(ipv6_dev_mc_inc); |
c7ea20c9 | 944 | |
1da177e4 LT |
945 | /* |
946 | * device multicast group del | |
947 | */ | |
9acd9f3a | 948 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
949 | { |
950 | struct ifmcaddr6 *ma, **map; | |
951 | ||
a9ed4a29 SD |
952 | ASSERT_RTNL(); |
953 | ||
1da177e4 | 954 | write_lock_bh(&idev->lock); |
67ba4152 | 955 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
956 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
957 | if (--ma->mca_users == 0) { | |
958 | *map = ma->next; | |
959 | write_unlock_bh(&idev->lock); | |
960 | ||
961 | igmp6_group_dropped(ma); | |
1666d49e | 962 | ip6_mc_clear_src(ma); |
1da177e4 LT |
963 | |
964 | ma_put(ma); | |
965 | return 0; | |
966 | } | |
967 | write_unlock_bh(&idev->lock); | |
968 | return 0; | |
969 | } | |
970 | } | |
971 | write_unlock_bh(&idev->lock); | |
972 | ||
973 | return -ENOENT; | |
974 | } | |
975 | ||
9acd9f3a | 976 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 977 | { |
96b52e61 | 978 | struct inet6_dev *idev; |
1da177e4 LT |
979 | int err; |
980 | ||
414b6c94 | 981 | ASSERT_RTNL(); |
1da177e4 | 982 | |
96b52e61 ED |
983 | idev = __in6_dev_get(dev); |
984 | if (!idev) | |
985 | err = -ENODEV; | |
986 | else | |
987 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
988 | |
989 | return err; | |
990 | } | |
4effd28c | 991 | EXPORT_SYMBOL(ipv6_dev_mc_dec); |
1da177e4 | 992 | |
1da177e4 LT |
993 | /* |
994 | * check if the interface/address pair is valid | |
995 | */ | |
a50feda5 ED |
996 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
997 | const struct in6_addr *src_addr) | |
1da177e4 LT |
998 | { |
999 | struct inet6_dev *idev; | |
1000 | struct ifmcaddr6 *mc; | |
a50feda5 | 1001 | bool rv = false; |
1da177e4 | 1002 | |
96b52e61 ED |
1003 | rcu_read_lock(); |
1004 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
1005 | if (idev) { |
1006 | read_lock_bh(&idev->lock); | |
67ba4152 | 1007 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
1008 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
1009 | break; | |
1010 | } | |
1011 | if (mc) { | |
1012 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
1013 | struct ip6_sf_list *psf; | |
1014 | ||
1015 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 1016 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1017 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
1018 | break; | |
1019 | } | |
1020 | if (psf) | |
1021 | rv = psf->sf_count[MCAST_INCLUDE] || | |
1022 | psf->sf_count[MCAST_EXCLUDE] != | |
1023 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
1024 | else | |
67ba4152 | 1025 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
1026 | spin_unlock_bh(&mc->mca_lock); |
1027 | } else | |
a50feda5 | 1028 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
1029 | } |
1030 | read_unlock_bh(&idev->lock); | |
1da177e4 | 1031 | } |
96b52e61 | 1032 | rcu_read_unlock(); |
1da177e4 LT |
1033 | return rv; |
1034 | } | |
1035 | ||
1036 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1037 | { | |
63862b5b | 1038 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
1039 | |
1040 | idev->mc_gq_running = 1; | |
1041 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1042 | in6_dev_hold(idev); | |
1043 | } | |
1044 | ||
b4af8def DB |
1045 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
1046 | { | |
1047 | idev->mc_gq_running = 0; | |
1048 | if (del_timer(&idev->mc_gq_timer)) | |
1049 | __in6_dev_put(idev); | |
1050 | } | |
1051 | ||
c2cef4e8 | 1052 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1053 | { |
63862b5b | 1054 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1055 | |
1056 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1057 | in6_dev_hold(idev); | |
1058 | } | |
1059 | ||
b4af8def DB |
1060 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1061 | { | |
1062 | idev->mc_ifc_count = 0; | |
1063 | if (del_timer(&idev->mc_ifc_timer)) | |
1064 | __in6_dev_put(idev); | |
1065 | } | |
1066 | ||
c2cef4e8 | 1067 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1068 | { |
63862b5b | 1069 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1070 | |
1071 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1072 | in6_dev_hold(idev); | |
1073 | } | |
1074 | ||
b4af8def DB |
1075 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1076 | { | |
1077 | if (del_timer(&idev->mc_dad_timer)) | |
1078 | __in6_dev_put(idev); | |
1079 | } | |
1080 | ||
1da177e4 LT |
1081 | /* |
1082 | * IGMP handling (alias multicast ICMPv6 messages) | |
1083 | */ | |
1084 | ||
1085 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1086 | { | |
1087 | unsigned long delay = resptime; | |
1088 | ||
1089 | /* Do not start timer for these addresses */ | |
1090 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1091 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1092 | return; | |
1093 | ||
1094 | if (del_timer(&ma->mca_timer)) { | |
d3981bc6 | 1095 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
1096 | delay = ma->mca_timer.expires - jiffies; |
1097 | } | |
1098 | ||
cc7f7ab7 | 1099 | if (delay >= resptime) |
63862b5b | 1100 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1101 | |
1da177e4 LT |
1102 | ma->mca_timer.expires = jiffies + delay; |
1103 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
d3981bc6 | 1104 | refcount_inc(&ma->mca_refcnt); |
1da177e4 LT |
1105 | ma->mca_flags |= MAF_TIMER_RUNNING; |
1106 | } | |
1107 | ||
5ab4a6c8 | 1108 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1109 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1110 | const struct in6_addr *srcs) | |
1da177e4 LT |
1111 | { |
1112 | struct ip6_sf_list *psf; | |
1113 | int i, scount; | |
1114 | ||
1115 | scount = 0; | |
67ba4152 | 1116 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1117 | if (scount == nsrcs) |
1118 | break; | |
67ba4152 | 1119 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1120 | /* skip inactive filters */ |
e05c4ad3 | 1121 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1122 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1123 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1124 | break; |
5ab4a6c8 DS |
1125 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1126 | scount++; | |
1127 | break; | |
1128 | } | |
1129 | } | |
1130 | } | |
1131 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1132 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1133 | return false; |
1134 | return true; | |
5ab4a6c8 DS |
1135 | } |
1136 | ||
a50feda5 ED |
1137 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1138 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1139 | { |
1140 | struct ip6_sf_list *psf; | |
1141 | int i, scount; | |
1142 | ||
1143 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1144 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1145 | ||
1146 | /* mark INCLUDE-mode sources */ | |
1147 | ||
1148 | scount = 0; | |
67ba4152 | 1149 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1150 | if (scount == nsrcs) |
1151 | break; | |
67ba4152 | 1152 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1153 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1154 | psf->sf_gsresp = 1; | |
1155 | scount++; | |
1156 | break; | |
1157 | } | |
5ab4a6c8 DS |
1158 | } |
1159 | } | |
1160 | if (!scount) { | |
1161 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1162 | return false; |
1da177e4 | 1163 | } |
5ab4a6c8 | 1164 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1165 | return true; |
1da177e4 LT |
1166 | } |
1167 | ||
58c0ecfd DB |
1168 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1169 | { | |
1170 | /* Normally, both are 0 here. If enforcement to a particular is | |
1171 | * being used, individual device enforcement will have a lower | |
1172 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1173 | */ | |
1174 | ||
1175 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1176 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1177 | else | |
1178 | return idev->cnf.force_mld_version; | |
1179 | } | |
1180 | ||
1181 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1182 | { | |
1183 | return mld_force_mld_version(idev) == 2; | |
1184 | } | |
1185 | ||
1186 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1187 | { | |
1188 | return mld_force_mld_version(idev) == 1; | |
1189 | } | |
1190 | ||
6c567b78 DB |
1191 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1192 | { | |
58c0ecfd DB |
1193 | if (mld_in_v2_mode_only(idev)) |
1194 | return false; | |
1195 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1196 | return true; |
1197 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1198 | return true; | |
1199 | ||
1200 | return false; | |
1201 | } | |
1202 | ||
89225d1c DB |
1203 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1204 | { | |
1205 | /* RFC3810, relevant sections: | |
1206 | * - 9.1. Robustness Variable | |
1207 | * - 9.2. Query Interval | |
1208 | * - 9.3. Query Response Interval | |
1209 | * - 9.12. Older Version Querier Present Timeout | |
1210 | */ | |
1211 | unsigned long switchback; | |
1212 | ||
1213 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1214 | ||
1215 | idev->mc_v1_seen = jiffies + switchback; | |
1216 | } | |
1217 | ||
1218 | static void mld_update_qrv(struct inet6_dev *idev, | |
1219 | const struct mld2_query *mlh2) | |
1220 | { | |
1221 | /* RFC3810, relevant sections: | |
1222 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1223 | * - 9.1. Robustness Variable | |
1224 | */ | |
1225 | ||
1226 | /* The value of the Robustness Variable MUST NOT be zero, | |
1227 | * and SHOULD NOT be one. Catch this here if we ever run | |
1228 | * into such a case in future. | |
1229 | */ | |
2f711939 | 1230 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1231 | WARN_ON(idev->mc_qrv == 0); |
1232 | ||
1233 | if (mlh2->mld2q_qrv > 0) | |
1234 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1235 | ||
2f711939 | 1236 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1237 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1238 | idev->mc_qrv, min_qrv); |
1239 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1240 | } |
1241 | } | |
1242 | ||
1243 | static void mld_update_qi(struct inet6_dev *idev, | |
1244 | const struct mld2_query *mlh2) | |
1245 | { | |
1246 | /* RFC3810, relevant sections: | |
1247 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1248 | * - 9.2. Query Interval | |
1249 | * - 9.12. Older Version Querier Present Timeout | |
1250 | * (the [Query Interval] in the last Query received) | |
1251 | */ | |
1252 | unsigned long mc_qqi; | |
1253 | ||
1254 | if (mlh2->mld2q_qqic < 128) { | |
1255 | mc_qqi = mlh2->mld2q_qqic; | |
1256 | } else { | |
1257 | unsigned long mc_man, mc_exp; | |
1258 | ||
1259 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1260 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1261 | ||
1262 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1263 | } | |
1264 | ||
1265 | idev->mc_qi = mc_qqi * HZ; | |
1266 | } | |
1267 | ||
1268 | static void mld_update_qri(struct inet6_dev *idev, | |
1269 | const struct mld2_query *mlh2) | |
1270 | { | |
1271 | /* RFC3810, relevant sections: | |
1272 | * - 5.1.3. Maximum Response Code | |
1273 | * - 9.3. Query Response Interval | |
1274 | */ | |
e3f5b170 | 1275 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1276 | } |
1277 | ||
2b7c121f | 1278 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
35f7aa53 | 1279 | unsigned long *max_delay, bool v1_query) |
2b7c121f DB |
1280 | { |
1281 | unsigned long mldv1_md; | |
1282 | ||
1283 | /* Ignore v1 queries */ | |
1284 | if (mld_in_v2_mode_only(idev)) | |
1285 | return -EINVAL; | |
1286 | ||
2b7c121f | 1287 | mldv1_md = ntohs(mld->mld_maxdelay); |
35f7aa53 DB |
1288 | |
1289 | /* When in MLDv1 fallback and a MLDv2 router start-up being | |
1290 | * unaware of current MLDv1 operation, the MRC == MRD mapping | |
1291 | * only works when the exponential algorithm is not being | |
1292 | * used (as MLDv1 is unaware of such things). | |
1293 | * | |
1294 | * According to the RFC author, the MLDv2 implementations | |
1295 | * he's aware of all use a MRC < 32768 on start up queries. | |
1296 | * | |
1297 | * Thus, should we *ever* encounter something else larger | |
1298 | * than that, just assume the maximum possible within our | |
1299 | * reach. | |
1300 | */ | |
1301 | if (!v1_query) | |
1302 | mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT); | |
1303 | ||
2b7c121f DB |
1304 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); |
1305 | ||
35f7aa53 DB |
1306 | /* MLDv1 router present: we need to go into v1 mode *only* |
1307 | * when an MLDv1 query is received as per section 9.12. of | |
1308 | * RFC3810! And we know from RFC2710 section 3.7 that MLDv1 | |
1309 | * queries MUST be of exactly 24 octets. | |
1310 | */ | |
1311 | if (v1_query) | |
1312 | mld_set_v1_mode(idev); | |
2b7c121f DB |
1313 | |
1314 | /* cancel MLDv2 report timer */ | |
b4af8def | 1315 | mld_gq_stop_timer(idev); |
2b7c121f | 1316 | /* cancel the interface change timer */ |
b4af8def | 1317 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1318 | /* clear deleted report items */ |
1319 | mld_clear_delrec(idev); | |
1320 | ||
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1325 | unsigned long *max_delay) | |
1326 | { | |
2b7c121f DB |
1327 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); |
1328 | ||
1329 | mld_update_qrv(idev, mld); | |
1330 | mld_update_qi(idev, mld); | |
1331 | mld_update_qri(idev, mld); | |
1332 | ||
1333 | idev->mc_maxdelay = *max_delay; | |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
96b52e61 | 1338 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1339 | int igmp6_event_query(struct sk_buff *skb) |
1340 | { | |
97300b5f | 1341 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1342 | struct ifmcaddr6 *ma; |
b71d1d42 | 1343 | const struct in6_addr *group; |
1da177e4 LT |
1344 | unsigned long max_delay; |
1345 | struct inet6_dev *idev; | |
6e7cb837 | 1346 | struct mld_msg *mld; |
1da177e4 LT |
1347 | int group_type; |
1348 | int mark = 0; | |
2b7c121f | 1349 | int len, err; |
1da177e4 LT |
1350 | |
1351 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1352 | return -EINVAL; | |
1353 | ||
1354 | /* compute payload length excluding extension headers */ | |
0660e03f | 1355 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1356 | len -= skb_network_header_len(skb); |
1da177e4 | 1357 | |
e940f5d6 HL |
1358 | /* RFC3810 6.2 |
1359 | * Upon reception of an MLD message that contains a Query, the node | |
1360 | * checks if the source address of the message is a valid link-local | |
1361 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1362 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1363 | * packet. If any of these checks fails, the packet is dropped. | |
1364 | */ | |
1365 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1366 | ipv6_hdr(skb)->hop_limit != 1 || | |
1367 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1368 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1369 | return -EINVAL; |
1370 | ||
96b52e61 | 1371 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1372 | if (!idev) |
1da177e4 LT |
1373 | return 0; |
1374 | ||
6e7cb837 YH |
1375 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1376 | group = &mld->mld_mca; | |
1da177e4 LT |
1377 | group_type = ipv6_addr_type(group); |
1378 | ||
1379 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1380 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1381 | return -EINVAL; |
1da177e4 | 1382 | |
35f7aa53 DB |
1383 | if (len < MLD_V1_QUERY_LEN) { |
1384 | return -EINVAL; | |
1385 | } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) { | |
1386 | err = mld_process_v1(idev, mld, &max_delay, | |
1387 | len == MLD_V1_QUERY_LEN); | |
2b7c121f DB |
1388 | if (err < 0) |
1389 | return err; | |
9fd07841 | 1390 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1391 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1392 | sizeof(struct icmp6hdr); |
89225d1c | 1393 | |
96b52e61 | 1394 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1395 | return -EINVAL; |
96b52e61 | 1396 | |
9c70220b | 1397 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1398 | |
2b7c121f DB |
1399 | err = mld_process_v2(idev, mlh2, &max_delay); |
1400 | if (err < 0) | |
1401 | return err; | |
89225d1c | 1402 | |
1da177e4 | 1403 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1404 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1405 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1406 | |
1da177e4 | 1407 | mld_gq_start_timer(idev); |
1da177e4 LT |
1408 | return 0; |
1409 | } | |
1410 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1411 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1412 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1413 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1414 | return -EINVAL; |
96b52e61 | 1415 | |
9c70220b | 1416 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1417 | mark = 1; |
1418 | } | |
35f7aa53 | 1419 | } else { |
1da177e4 | 1420 | return -EINVAL; |
35f7aa53 | 1421 | } |
1da177e4 LT |
1422 | |
1423 | read_lock_bh(&idev->lock); | |
1424 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1425 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1426 | spin_lock_bh(&ma->mca_lock); |
1427 | igmp6_group_queried(ma, max_delay); | |
1428 | spin_unlock_bh(&ma->mca_lock); | |
1429 | } | |
1430 | } else { | |
67ba4152 | 1431 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1432 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1433 | continue; |
1434 | spin_lock_bh(&ma->mca_lock); | |
1435 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1436 | /* gsquery <- gsquery && mark */ | |
1437 | if (!mark) | |
1438 | ma->mca_flags &= ~MAF_GSQUERY; | |
1439 | } else { | |
1440 | /* gsquery <- mark */ | |
1441 | if (mark) | |
1442 | ma->mca_flags |= MAF_GSQUERY; | |
1443 | else | |
1444 | ma->mca_flags &= ~MAF_GSQUERY; | |
1445 | } | |
5ab4a6c8 | 1446 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1447 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1448 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1449 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1450 | break; |
1da177e4 LT |
1451 | } |
1452 | } | |
1453 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1454 | |
1455 | return 0; | |
1456 | } | |
1457 | ||
96b52e61 | 1458 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1459 | int igmp6_event_report(struct sk_buff *skb) |
1460 | { | |
1461 | struct ifmcaddr6 *ma; | |
1da177e4 | 1462 | struct inet6_dev *idev; |
6e7cb837 | 1463 | struct mld_msg *mld; |
1da177e4 LT |
1464 | int addr_type; |
1465 | ||
1466 | /* Our own report looped back. Ignore it. */ | |
1467 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1468 | return 0; | |
1469 | ||
24c69275 DS |
1470 | /* send our report if the MC router may not have heard this report */ |
1471 | if (skb->pkt_type != PACKET_MULTICAST && | |
1472 | skb->pkt_type != PACKET_BROADCAST) | |
1473 | return 0; | |
1474 | ||
6e7cb837 | 1475 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1476 | return -EINVAL; |
1477 | ||
6e7cb837 | 1478 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1479 | |
1480 | /* Drop reports with not link local source */ | |
0660e03f | 1481 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1482 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1483 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1484 | return -EINVAL; | |
1485 | ||
96b52e61 | 1486 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1487 | if (!idev) |
1da177e4 LT |
1488 | return -ENODEV; |
1489 | ||
1490 | /* | |
1491 | * Cancel the timer for this group | |
1492 | */ | |
1493 | ||
1494 | read_lock_bh(&idev->lock); | |
67ba4152 | 1495 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1496 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1497 | spin_lock(&ma->mca_lock); |
1498 | if (del_timer(&ma->mca_timer)) | |
d3981bc6 | 1499 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
1500 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); |
1501 | spin_unlock(&ma->mca_lock); | |
1502 | break; | |
1503 | } | |
1504 | } | |
1505 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1506 | return 0; |
1507 | } | |
1508 | ||
a50feda5 ED |
1509 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1510 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1511 | { |
1512 | switch (type) { | |
1513 | case MLD2_MODE_IS_INCLUDE: | |
1514 | case MLD2_MODE_IS_EXCLUDE: | |
1515 | if (gdeleted || sdeleted) | |
a50feda5 | 1516 | return false; |
5ab4a6c8 DS |
1517 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1518 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1519 | return true; |
5ab4a6c8 DS |
1520 | /* don't include if this source is excluded |
1521 | * in all filters | |
1522 | */ | |
1523 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1524 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1525 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1526 | psf->sf_count[MCAST_EXCLUDE]; | |
1527 | } | |
a50feda5 | 1528 | return false; |
1da177e4 LT |
1529 | case MLD2_CHANGE_TO_INCLUDE: |
1530 | if (gdeleted || sdeleted) | |
a50feda5 | 1531 | return false; |
1da177e4 LT |
1532 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1533 | case MLD2_CHANGE_TO_EXCLUDE: | |
1534 | if (gdeleted || sdeleted) | |
a50feda5 | 1535 | return false; |
1da177e4 LT |
1536 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1537 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1538 | return false; |
1da177e4 LT |
1539 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1540 | psf->sf_count[MCAST_EXCLUDE]; | |
1541 | case MLD2_ALLOW_NEW_SOURCES: | |
1542 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1543 | return false; |
1da177e4 LT |
1544 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1545 | case MLD2_BLOCK_OLD_SOURCES: | |
1546 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1547 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1548 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1549 | } | |
a50feda5 | 1550 | return false; |
1da177e4 LT |
1551 | } |
1552 | ||
1553 | static int | |
1554 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1555 | { | |
1556 | struct ip6_sf_list *psf; | |
1557 | int scount = 0; | |
1558 | ||
67ba4152 | 1559 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1560 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1561 | continue; | |
1562 | scount++; | |
1563 | } | |
1564 | return scount; | |
1565 | } | |
1566 | ||
2576f17d YH |
1567 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1568 | struct net_device *dev, | |
1569 | const struct in6_addr *saddr, | |
1570 | const struct in6_addr *daddr, | |
1571 | int proto, int len) | |
1572 | { | |
1573 | struct ipv6hdr *hdr; | |
1574 | ||
1575 | skb->protocol = htons(ETH_P_IPV6); | |
1576 | skb->dev = dev; | |
1577 | ||
1578 | skb_reset_network_header(skb); | |
1579 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1580 | hdr = ipv6_hdr(skb); | |
1581 | ||
1582 | ip6_flow_hdr(hdr, 0, 0); | |
1583 | ||
1584 | hdr->payload_len = htons(len); | |
1585 | hdr->nexthdr = proto; | |
1586 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1587 | ||
1588 | hdr->saddr = *saddr; | |
1589 | hdr->daddr = *daddr; | |
1590 | } | |
1591 | ||
4c672e4b | 1592 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu) |
1da177e4 | 1593 | { |
8965779d | 1594 | struct net_device *dev = idev->dev; |
c346dca1 | 1595 | struct net *net = dev_net(dev); |
b8ad0cbc | 1596 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1597 | struct sk_buff *skb; |
1598 | struct mld2_report *pmr; | |
1599 | struct in6_addr addr_buf; | |
d7aabf22 | 1600 | const struct in6_addr *saddr; |
a7ae1992 HX |
1601 | int hlen = LL_RESERVED_SPACE(dev); |
1602 | int tlen = dev->needed_tailroom; | |
4c672e4b | 1603 | unsigned int size = mtu + hlen + tlen; |
1da177e4 LT |
1604 | int err; |
1605 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1606 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1607 | IPV6_TLV_PADN, 0 }; | |
1608 | ||
1609 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1610 | /* limit our allocations to order-0 page */ |
1611 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1612 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1613 | |
cfcabdcc | 1614 | if (!skb) |
1da177e4 LT |
1615 | return NULL; |
1616 | ||
9d4a0314 | 1617 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1618 | skb_reserve(skb, hlen); |
1837b2e2 | 1619 | skb_tailroom_reserve(skb, mtu, tlen); |
1da177e4 | 1620 | |
8965779d | 1621 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1622 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1623 | * use unspecified address as the source address |
1da177e4 LT |
1624 | * when a valid link-local address is not available. |
1625 | */ | |
d7aabf22 YH |
1626 | saddr = &in6addr_any; |
1627 | } else | |
1628 | saddr = &addr_buf; | |
1da177e4 | 1629 | |
2576f17d | 1630 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 | 1631 | |
59ae1d12 | 1632 | skb_put_data(skb, ra, sizeof(ra)); |
1da177e4 | 1633 | |
27a884dc | 1634 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1635 | skb_put(skb, sizeof(*pmr)); |
1636 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1637 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1638 | pmr->mld2r_resv1 = 0; | |
1639 | pmr->mld2r_cksum = 0; | |
1640 | pmr->mld2r_resv2 = 0; | |
1641 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1642 | return skb; |
1643 | } | |
1644 | ||
1645 | static void mld_sendpack(struct sk_buff *skb) | |
1646 | { | |
0660e03f | 1647 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1648 | struct mld2_report *pmr = |
1649 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1650 | int payload_len, mldlen; |
96b52e61 | 1651 | struct inet6_dev *idev; |
c346dca1 | 1652 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1653 | int err; |
4c9483b2 | 1654 | struct flowi6 fl6; |
adf30907 | 1655 | struct dst_entry *dst; |
1da177e4 | 1656 | |
96b52e61 ED |
1657 | rcu_read_lock(); |
1658 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1659 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1660 | ||
29a3cad5 SH |
1661 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1662 | sizeof(*pip6); | |
1663 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1664 | pip6->payload_len = htons(payload_len); |
1665 | ||
6e7cb837 YH |
1666 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1667 | IPPROTO_ICMPV6, | |
1668 | csum_partial(skb_transport_header(skb), | |
1669 | mldlen, 0)); | |
41927178 | 1670 | |
4c9483b2 | 1671 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1672 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1673 | skb->dev->ifindex); | |
12fd84f4 | 1674 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1675 | |
452edd59 DM |
1676 | err = 0; |
1677 | if (IS_ERR(dst)) { | |
1678 | err = PTR_ERR(dst); | |
1679 | dst = NULL; | |
1680 | } | |
adf30907 | 1681 | skb_dst_set(skb, dst); |
41927178 YH |
1682 | if (err) |
1683 | goto err_out; | |
1684 | ||
7026b1dd | 1685 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
29a26a56 | 1686 | net, net->ipv6.igmp_sk, skb, NULL, skb->dev, |
13206b6b | 1687 | dst_output); |
41927178 | 1688 | out: |
1da177e4 | 1689 | if (!err) { |
43a43b60 HFS |
1690 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1691 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
43a43b60 HFS |
1692 | } else { |
1693 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1694 | } | |
1da177e4 | 1695 | |
96b52e61 | 1696 | rcu_read_unlock(); |
41927178 YH |
1697 | return; |
1698 | ||
1699 | err_out: | |
1700 | kfree_skb(skb); | |
1701 | goto out; | |
1da177e4 LT |
1702 | } |
1703 | ||
1704 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1705 | { | |
fab10fe3 | 1706 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1707 | } |
1708 | ||
1709 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
b9b312a7 | 1710 | int type, struct mld2_grec **ppgr, unsigned int mtu) |
1da177e4 | 1711 | { |
1da177e4 LT |
1712 | struct mld2_report *pmr; |
1713 | struct mld2_grec *pgr; | |
1714 | ||
b9b312a7 ED |
1715 | if (!skb) { |
1716 | skb = mld_newpack(pmc->idev, mtu); | |
1717 | if (!skb) | |
1718 | return NULL; | |
1719 | } | |
4df864c1 | 1720 | pgr = skb_put(skb, sizeof(struct mld2_grec)); |
1da177e4 LT |
1721 | pgr->grec_type = type; |
1722 | pgr->grec_auxwords = 0; | |
1723 | pgr->grec_nsrcs = 0; | |
1724 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1725 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1726 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1727 | *ppgr = pgr; |
1728 | return skb; | |
1729 | } | |
1730 | ||
4c672e4b | 1731 | #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0) |
1da177e4 LT |
1732 | |
1733 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1734 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1735 | { |
8965779d AW |
1736 | struct inet6_dev *idev = pmc->idev; |
1737 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1738 | struct mld2_report *pmr; |
1739 | struct mld2_grec *pgr = NULL; | |
1740 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1741 | int scount, stotal, first, isquery, truncate; |
b9b312a7 | 1742 | unsigned int mtu; |
1da177e4 LT |
1743 | |
1744 | if (pmc->mca_flags & MAF_NOREPORT) | |
1745 | return skb; | |
1746 | ||
b9b312a7 ED |
1747 | mtu = READ_ONCE(dev->mtu); |
1748 | if (mtu < IPV6_MIN_MTU) | |
1749 | return skb; | |
1750 | ||
1da177e4 LT |
1751 | isquery = type == MLD2_MODE_IS_INCLUDE || |
1752 | type == MLD2_MODE_IS_EXCLUDE; | |
1753 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1754 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1755 | ||
5ab4a6c8 DS |
1756 | stotal = scount = 0; |
1757 | ||
1da177e4 LT |
1758 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1759 | ||
5ab4a6c8 DS |
1760 | if (!*psf_list) |
1761 | goto empty_source; | |
1762 | ||
9c70220b | 1763 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1764 | |
1765 | /* EX and TO_EX get a fresh packet, if needed */ | |
1766 | if (truncate) { | |
6e7cb837 | 1767 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1768 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1769 | if (skb) | |
1770 | mld_sendpack(skb); | |
b9b312a7 | 1771 | skb = mld_newpack(idev, mtu); |
1da177e4 LT |
1772 | } |
1773 | } | |
1774 | first = 1; | |
1da177e4 | 1775 | psf_prev = NULL; |
67ba4152 | 1776 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1777 | struct in6_addr *psrc; |
1778 | ||
1779 | psf_next = psf->sf_next; | |
1780 | ||
c7ea20c9 | 1781 | if (!is_in(pmc, psf, type, gdeleted, sdeleted) && !crsend) { |
1da177e4 LT |
1782 | psf_prev = psf; |
1783 | continue; | |
1784 | } | |
1785 | ||
a052517a HL |
1786 | /* Based on RFC3810 6.1. Should not send source-list change |
1787 | * records when there is a filter mode change. | |
1788 | */ | |
1789 | if (((gdeleted && pmc->mca_sfmode == MCAST_EXCLUDE) || | |
1790 | (!gdeleted && pmc->mca_crcount)) && | |
1791 | (type == MLD2_ALLOW_NEW_SOURCES || | |
1792 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) | |
1793 | goto decrease_sf_crcount; | |
1794 | ||
1da177e4 LT |
1795 | /* clear marks on query responses */ |
1796 | if (isquery) | |
1797 | psf->sf_gsresp = 0; | |
1798 | ||
1799 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1800 | first*sizeof(struct mld2_grec)) { | |
1801 | if (truncate && !first) | |
1802 | break; /* truncate these */ | |
1803 | if (pgr) | |
1804 | pgr->grec_nsrcs = htons(scount); | |
1805 | if (skb) | |
1806 | mld_sendpack(skb); | |
b9b312a7 | 1807 | skb = mld_newpack(idev, mtu); |
1da177e4 LT |
1808 | first = 1; |
1809 | scount = 0; | |
1810 | } | |
1811 | if (first) { | |
b9b312a7 | 1812 | skb = add_grhead(skb, pmc, type, &pgr, mtu); |
1da177e4 LT |
1813 | first = 0; |
1814 | } | |
cc63f70b AD |
1815 | if (!skb) |
1816 | return NULL; | |
4df864c1 | 1817 | psrc = skb_put(skb, sizeof(*psrc)); |
1da177e4 | 1818 | *psrc = psf->sf_addr; |
5ab4a6c8 | 1819 | scount++; stotal++; |
1da177e4 LT |
1820 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1821 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
a052517a | 1822 | decrease_sf_crcount: |
1da177e4 LT |
1823 | psf->sf_crcount--; |
1824 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1825 | if (psf_prev) | |
1826 | psf_prev->sf_next = psf->sf_next; | |
1827 | else | |
1828 | *psf_list = psf->sf_next; | |
1829 | kfree(psf); | |
1830 | continue; | |
1831 | } | |
1832 | } | |
1833 | psf_prev = psf; | |
1834 | } | |
5ab4a6c8 DS |
1835 | |
1836 | empty_source: | |
1837 | if (!stotal) { | |
1838 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1839 | type == MLD2_BLOCK_OLD_SOURCES) | |
1840 | return skb; | |
6a7cc418 | 1841 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1842 | /* make sure we have room for group header */ |
1843 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1844 | mld_sendpack(skb); | |
1845 | skb = NULL; /* add_grhead will get a new one */ | |
1846 | } | |
b9b312a7 | 1847 | skb = add_grhead(skb, pmc, type, &pgr, mtu); |
5ab4a6c8 DS |
1848 | } |
1849 | } | |
1da177e4 LT |
1850 | if (pgr) |
1851 | pgr->grec_nsrcs = htons(scount); | |
1852 | ||
1853 | if (isquery) | |
1854 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1855 | return skb; | |
1856 | } | |
1857 | ||
1858 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1859 | { | |
1860 | struct sk_buff *skb = NULL; | |
1861 | int type; | |
1862 | ||
8965779d | 1863 | read_lock_bh(&idev->lock); |
1da177e4 | 1864 | if (!pmc) { |
67ba4152 | 1865 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1866 | if (pmc->mca_flags & MAF_NOREPORT) |
1867 | continue; | |
1868 | spin_lock_bh(&pmc->mca_lock); | |
1869 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1870 | type = MLD2_MODE_IS_EXCLUDE; | |
1871 | else | |
1872 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1873 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1874 | spin_unlock_bh(&pmc->mca_lock); |
1875 | } | |
1da177e4 LT |
1876 | } else { |
1877 | spin_lock_bh(&pmc->mca_lock); | |
1878 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1879 | type = MLD2_MODE_IS_EXCLUDE; | |
1880 | else | |
1881 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1882 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1883 | spin_unlock_bh(&pmc->mca_lock); |
1884 | } | |
8965779d | 1885 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1886 | if (skb) |
1887 | mld_sendpack(skb); | |
1888 | } | |
1889 | ||
1890 | /* | |
1891 | * remove zero-count source records from a source filter list | |
1892 | */ | |
1893 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1894 | { | |
1895 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1896 | ||
1897 | psf_prev = NULL; | |
67ba4152 | 1898 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1899 | psf_next = psf->sf_next; |
1900 | if (psf->sf_crcount == 0) { | |
1901 | if (psf_prev) | |
1902 | psf_prev->sf_next = psf->sf_next; | |
1903 | else | |
1904 | *ppsf = psf->sf_next; | |
1905 | kfree(psf); | |
1906 | } else | |
1907 | psf_prev = psf; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | static void mld_send_cr(struct inet6_dev *idev) | |
1912 | { | |
1913 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1914 | struct sk_buff *skb = NULL; | |
1915 | int type, dtype; | |
1916 | ||
1917 | read_lock_bh(&idev->lock); | |
6457d26b | 1918 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1919 | |
1920 | /* deleted MCA's */ | |
1921 | pmc_prev = NULL; | |
67ba4152 | 1922 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1923 | pmc_next = pmc->next; |
1924 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1925 | type = MLD2_BLOCK_OLD_SOURCES; | |
1926 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1927 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1928 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1929 | } |
1930 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1931 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1932 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1933 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1934 | } |
5ab4a6c8 | 1935 | pmc->mca_crcount--; |
1da177e4 LT |
1936 | if (pmc->mca_crcount == 0) { |
1937 | mld_clear_zeros(&pmc->mca_tomb); | |
1938 | mld_clear_zeros(&pmc->mca_sources); | |
1939 | } | |
1940 | } | |
1941 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1942 | !pmc->mca_sources) { | |
1943 | if (pmc_prev) | |
1944 | pmc_prev->next = pmc_next; | |
1945 | else | |
1946 | idev->mc_tomb = pmc_next; | |
1947 | in6_dev_put(pmc->idev); | |
1948 | kfree(pmc); | |
1949 | } else | |
1950 | pmc_prev = pmc; | |
1951 | } | |
6457d26b | 1952 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1953 | |
1954 | /* change recs */ | |
67ba4152 | 1955 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1956 | spin_lock_bh(&pmc->mca_lock); |
1957 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1958 | type = MLD2_BLOCK_OLD_SOURCES; | |
1959 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1960 | } else { | |
1961 | type = MLD2_ALLOW_NEW_SOURCES; | |
1962 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1963 | } | |
6a7cc418 FL |
1964 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1965 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1966 | |
1967 | /* filter mode changes */ | |
1968 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1969 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1970 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1971 | else | |
1972 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1973 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1974 | pmc->mca_crcount--; |
1da177e4 LT |
1975 | } |
1976 | spin_unlock_bh(&pmc->mca_lock); | |
1977 | } | |
1978 | read_unlock_bh(&idev->lock); | |
1979 | if (!skb) | |
1980 | return; | |
1981 | (void) mld_sendpack(skb); | |
1982 | } | |
1983 | ||
1984 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1985 | { | |
c346dca1 | 1986 | struct net *net = dev_net(dev); |
b8ad0cbc | 1987 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1988 | struct inet6_dev *idev; |
1ab1457c | 1989 | struct sk_buff *skb; |
6e7cb837 | 1990 | struct mld_msg *hdr; |
d7aabf22 | 1991 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1992 | struct in6_addr addr_buf; |
a7ae1992 HX |
1993 | int hlen = LL_RESERVED_SPACE(dev); |
1994 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1995 | int err, len, payload_len, full_len; |
1996 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1997 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1998 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1999 | struct flowi6 fl6; |
adf30907 | 2000 | struct dst_entry *dst; |
1da177e4 | 2001 | |
f3ee4010 YH |
2002 | if (type == ICMPV6_MGM_REDUCTION) |
2003 | snd_addr = &in6addr_linklocal_allrouters; | |
2004 | else | |
2005 | snd_addr = addr; | |
1da177e4 LT |
2006 | |
2007 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
2008 | payload_len = len + sizeof(ra); | |
2009 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
2010 | ||
edf391ff NH |
2011 | rcu_read_lock(); |
2012 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
2013 | IPSTATS_MIB_OUT, full_len); | |
2014 | rcu_read_unlock(); | |
2015 | ||
a7ae1992 | 2016 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 | 2017 | |
63159f29 | 2018 | if (!skb) { |
a11d206d | 2019 | rcu_read_lock(); |
3bd653c8 | 2020 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
2021 | IPSTATS_MIB_OUTDISCARDS); |
2022 | rcu_read_unlock(); | |
1da177e4 LT |
2023 | return; |
2024 | } | |
9d4a0314 | 2025 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 2026 | skb_reserve(skb, hlen); |
1da177e4 | 2027 | |
95c385b4 | 2028 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 2029 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 2030 | * use unspecified address as the source address |
1da177e4 LT |
2031 | * when a valid link-local address is not available. |
2032 | */ | |
d7aabf22 YH |
2033 | saddr = &in6addr_any; |
2034 | } else | |
2035 | saddr = &addr_buf; | |
1da177e4 | 2036 | |
2576f17d | 2037 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 | 2038 | |
59ae1d12 | 2039 | skb_put_data(skb, ra, sizeof(ra)); |
1da177e4 | 2040 | |
b080db58 | 2041 | hdr = skb_put_zero(skb, sizeof(struct mld_msg)); |
6e7cb837 | 2042 | hdr->mld_type = type; |
4e3fd7a0 | 2043 | hdr->mld_mca = *addr; |
1da177e4 | 2044 | |
6e7cb837 YH |
2045 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
2046 | IPPROTO_ICMPV6, | |
2047 | csum_partial(hdr, len, 0)); | |
1da177e4 | 2048 | |
96b52e61 ED |
2049 | rcu_read_lock(); |
2050 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 2051 | |
4c9483b2 | 2052 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
2053 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
2054 | skb->dev->ifindex); | |
12fd84f4 | 2055 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
2056 | if (IS_ERR(dst)) { |
2057 | err = PTR_ERR(dst); | |
41927178 | 2058 | goto err_out; |
452edd59 | 2059 | } |
41927178 | 2060 | |
adf30907 | 2061 | skb_dst_set(skb, dst); |
29a26a56 EB |
2062 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
2063 | net, sk, skb, NULL, skb->dev, | |
13206b6b | 2064 | dst_output); |
41927178 | 2065 | out: |
1da177e4 | 2066 | if (!err) { |
5c5d244b | 2067 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 2068 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
1da177e4 | 2069 | } else |
3bd653c8 | 2070 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 2071 | |
96b52e61 | 2072 | rcu_read_unlock(); |
1da177e4 | 2073 | return; |
41927178 YH |
2074 | |
2075 | err_out: | |
2076 | kfree_skb(skb); | |
2077 | goto out; | |
1da177e4 LT |
2078 | } |
2079 | ||
6a7cc418 | 2080 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 2081 | { |
6a7cc418 FL |
2082 | struct sk_buff *skb; |
2083 | struct ifmcaddr6 *pmc; | |
2084 | int type; | |
2085 | ||
2086 | if (mld_in_v1_mode(idev)) | |
2087 | return; | |
2088 | ||
2089 | skb = NULL; | |
2090 | read_lock_bh(&idev->lock); | |
67ba4152 | 2091 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2092 | spin_lock_bh(&pmc->mca_lock); |
2093 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2094 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2095 | else | |
c7ea20c9 | 2096 | type = MLD2_ALLOW_NEW_SOURCES; |
6a7cc418 FL |
2097 | skb = add_grec(skb, pmc, type, 0, 0, 1); |
2098 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2099 | } |
6a7cc418 FL |
2100 | read_unlock_bh(&idev->lock); |
2101 | if (skb) | |
2102 | mld_sendpack(skb); | |
b173ee48 HFS |
2103 | } |
2104 | ||
2105 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2106 | { | |
2107 | idev->mc_dad_count = idev->mc_qrv; | |
2108 | if (idev->mc_dad_count) { | |
6a7cc418 | 2109 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2110 | idev->mc_dad_count--; |
2111 | if (idev->mc_dad_count) | |
6c6da928 HL |
2112 | mld_dad_start_timer(idev, |
2113 | unsolicited_report_interval(idev)); | |
b173ee48 HFS |
2114 | } |
2115 | } | |
2116 | ||
e99e88a9 | 2117 | static void mld_dad_timer_expire(struct timer_list *t) |
b173ee48 | 2118 | { |
e99e88a9 | 2119 | struct inet6_dev *idev = from_timer(idev, t, mc_dad_timer); |
b173ee48 | 2120 | |
6a7cc418 | 2121 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2122 | if (idev->mc_dad_count) { |
2123 | idev->mc_dad_count--; | |
2124 | if (idev->mc_dad_count) | |
6c6da928 HL |
2125 | mld_dad_start_timer(idev, |
2126 | unsolicited_report_interval(idev)); | |
b173ee48 | 2127 | } |
9260d3e1 | 2128 | in6_dev_put(idev); |
b173ee48 HFS |
2129 | } |
2130 | ||
1da177e4 | 2131 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2132 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2133 | { |
2134 | struct ip6_sf_list *psf, *psf_prev; | |
2135 | int rv = 0; | |
2136 | ||
2137 | psf_prev = NULL; | |
67ba4152 | 2138 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2139 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2140 | break; | |
2141 | psf_prev = psf; | |
2142 | } | |
2143 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2144 | /* source filter not found, or count wrong => bug */ | |
2145 | return -ESRCH; | |
2146 | } | |
2147 | psf->sf_count[sfmode]--; | |
2148 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2149 | struct inet6_dev *idev = pmc->idev; | |
2150 | ||
2151 | /* no more filters for this source */ | |
2152 | if (psf_prev) | |
2153 | psf_prev->sf_next = psf->sf_next; | |
2154 | else | |
2155 | pmc->mca_sources = psf->sf_next; | |
2156 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2157 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2158 | psf->sf_crcount = idev->mc_qrv; |
2159 | psf->sf_next = pmc->mca_tomb; | |
2160 | pmc->mca_tomb = psf; | |
2161 | rv = 1; | |
2162 | } else | |
2163 | kfree(psf); | |
2164 | } | |
2165 | return rv; | |
2166 | } | |
2167 | ||
b71d1d42 ED |
2168 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2169 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2170 | int delta) |
2171 | { | |
2172 | struct ifmcaddr6 *pmc; | |
2173 | int changerec = 0; | |
2174 | int i, err; | |
2175 | ||
2176 | if (!idev) | |
2177 | return -ENODEV; | |
2178 | read_lock_bh(&idev->lock); | |
67ba4152 | 2179 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2180 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2181 | break; | |
2182 | } | |
2183 | if (!pmc) { | |
2184 | /* MCA not found?? bug */ | |
2185 | read_unlock_bh(&idev->lock); | |
2186 | return -ESRCH; | |
2187 | } | |
2188 | spin_lock_bh(&pmc->mca_lock); | |
2189 | sf_markstate(pmc); | |
2190 | if (!delta) { | |
2191 | if (!pmc->mca_sfcount[sfmode]) { | |
2192 | spin_unlock_bh(&pmc->mca_lock); | |
2193 | read_unlock_bh(&idev->lock); | |
2194 | return -EINVAL; | |
2195 | } | |
2196 | pmc->mca_sfcount[sfmode]--; | |
2197 | } | |
2198 | err = 0; | |
67ba4152 | 2199 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2200 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2201 | ||
2202 | changerec |= rv > 0; | |
2203 | if (!err && rv < 0) | |
2204 | err = rv; | |
2205 | } | |
2206 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2207 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2208 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2209 | struct ip6_sf_list *psf; | |
2210 | ||
2211 | /* filter mode change */ | |
2212 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2213 | pmc->mca_crcount = idev->mc_qrv; | |
2214 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2215 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2216 | psf->sf_crcount = 0; |
2217 | mld_ifc_event(pmc->idev); | |
2218 | } else if (sf_setstate(pmc) || changerec) | |
2219 | mld_ifc_event(pmc->idev); | |
2220 | spin_unlock_bh(&pmc->mca_lock); | |
2221 | read_unlock_bh(&idev->lock); | |
2222 | return err; | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * Add multicast single-source filter to the interface list | |
2227 | */ | |
2228 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2229 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2230 | { |
2231 | struct ip6_sf_list *psf, *psf_prev; | |
2232 | ||
2233 | psf_prev = NULL; | |
67ba4152 | 2234 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2235 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2236 | break; | |
2237 | psf_prev = psf; | |
2238 | } | |
2239 | if (!psf) { | |
0c600eda | 2240 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2241 | if (!psf) |
2242 | return -ENOBUFS; | |
0c600eda | 2243 | |
1da177e4 LT |
2244 | psf->sf_addr = *psfsrc; |
2245 | if (psf_prev) { | |
2246 | psf_prev->sf_next = psf; | |
2247 | } else | |
2248 | pmc->mca_sources = psf; | |
2249 | } | |
2250 | psf->sf_count[sfmode]++; | |
2251 | return 0; | |
2252 | } | |
2253 | ||
2254 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2255 | { | |
2256 | struct ip6_sf_list *psf; | |
2257 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2258 | ||
67ba4152 | 2259 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2260 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2261 | psf->sf_oldin = mca_xcount == | |
2262 | psf->sf_count[MCAST_EXCLUDE] && | |
2263 | !psf->sf_count[MCAST_INCLUDE]; | |
2264 | } else | |
2265 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2266 | } | |
2267 | ||
2268 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2269 | { | |
7add2a43 | 2270 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2271 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2272 | int qrv = pmc->idev->mc_qrv; | |
2273 | int new_in, rv; | |
2274 | ||
2275 | rv = 0; | |
67ba4152 | 2276 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2277 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2278 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2279 | !psf->sf_count[MCAST_INCLUDE]; | |
2280 | } else | |
2281 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2282 | if (new_in) { |
2283 | if (!psf->sf_oldin) { | |
e80e28b6 | 2284 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2285 | |
67ba4152 IM |
2286 | for (dpsf = pmc->mca_tomb; dpsf; |
2287 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2288 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2289 | &psf->sf_addr)) | |
2290 | break; | |
2291 | prev = dpsf; | |
2292 | } | |
2293 | if (dpsf) { | |
2294 | if (prev) | |
2295 | prev->sf_next = dpsf->sf_next; | |
2296 | else | |
2297 | pmc->mca_tomb = dpsf->sf_next; | |
2298 | kfree(dpsf); | |
2299 | } | |
2300 | psf->sf_crcount = qrv; | |
2301 | rv++; | |
2302 | } | |
2303 | } else if (psf->sf_oldin) { | |
2304 | psf->sf_crcount = 0; | |
2305 | /* | |
2306 | * add or update "delete" records if an active filter | |
2307 | * is now inactive | |
2308 | */ | |
67ba4152 | 2309 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2310 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2311 | &psf->sf_addr)) | |
2312 | break; | |
2313 | if (!dpsf) { | |
5d55354f | 2314 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2315 | if (!dpsf) |
2316 | continue; | |
2317 | *dpsf = *psf; | |
2318 | /* pmc->mca_lock held by callers */ | |
2319 | dpsf->sf_next = pmc->mca_tomb; | |
2320 | pmc->mca_tomb = dpsf; | |
2321 | } | |
2322 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2323 | rv++; |
2324 | } | |
2325 | } | |
2326 | return rv; | |
2327 | } | |
2328 | ||
2329 | /* | |
2330 | * Add multicast source filter list to the interface list | |
2331 | */ | |
b71d1d42 ED |
2332 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2333 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2334 | int delta) |
2335 | { | |
2336 | struct ifmcaddr6 *pmc; | |
2337 | int isexclude; | |
2338 | int i, err; | |
2339 | ||
2340 | if (!idev) | |
2341 | return -ENODEV; | |
2342 | read_lock_bh(&idev->lock); | |
67ba4152 | 2343 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2344 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2345 | break; | |
2346 | } | |
2347 | if (!pmc) { | |
2348 | /* MCA not found?? bug */ | |
2349 | read_unlock_bh(&idev->lock); | |
2350 | return -ESRCH; | |
2351 | } | |
2352 | spin_lock_bh(&pmc->mca_lock); | |
2353 | ||
2354 | sf_markstate(pmc); | |
2355 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2356 | if (!delta) | |
2357 | pmc->mca_sfcount[sfmode]++; | |
2358 | err = 0; | |
67ba4152 | 2359 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2360 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2361 | if (err) |
2362 | break; | |
2363 | } | |
2364 | if (err) { | |
2365 | int j; | |
2366 | ||
2367 | if (!delta) | |
2368 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2369 | for (j = 0; j < i; j++) |
78d50217 | 2370 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2371 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2372 | struct ip6_sf_list *psf; |
2373 | ||
2374 | /* filter mode change */ | |
2375 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2376 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2377 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2378 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2379 | /* else no filters; keep old mode for reports */ | |
2380 | ||
2381 | pmc->mca_crcount = idev->mc_qrv; | |
2382 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2383 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2384 | psf->sf_crcount = 0; |
2385 | mld_ifc_event(idev); | |
2386 | } else if (sf_setstate(pmc)) | |
2387 | mld_ifc_event(idev); | |
2388 | spin_unlock_bh(&pmc->mca_lock); | |
2389 | read_unlock_bh(&idev->lock); | |
2390 | return err; | |
2391 | } | |
2392 | ||
2393 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2394 | { | |
2395 | struct ip6_sf_list *psf, *nextpsf; | |
2396 | ||
67ba4152 | 2397 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2398 | nextpsf = psf->sf_next; |
2399 | kfree(psf); | |
2400 | } | |
2401 | pmc->mca_tomb = NULL; | |
67ba4152 | 2402 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2403 | nextpsf = psf->sf_next; |
2404 | kfree(psf); | |
2405 | } | |
2406 | pmc->mca_sources = NULL; | |
2407 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2408 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2409 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2410 | } | |
2411 | ||
2412 | ||
2413 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2414 | { | |
2415 | unsigned long delay; | |
2416 | ||
2417 | if (ma->mca_flags & MAF_NOREPORT) | |
2418 | return; | |
2419 | ||
2420 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2421 | ||
63862b5b | 2422 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2423 | |
2424 | spin_lock_bh(&ma->mca_lock); | |
2425 | if (del_timer(&ma->mca_timer)) { | |
d3981bc6 | 2426 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
2427 | delay = ma->mca_timer.expires - jiffies; |
2428 | } | |
2429 | ||
2430 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
d3981bc6 | 2431 | refcount_inc(&ma->mca_refcnt); |
1da177e4 LT |
2432 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; |
2433 | spin_unlock_bh(&ma->mca_lock); | |
2434 | } | |
2435 | ||
2436 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2437 | struct inet6_dev *idev) | |
2438 | { | |
2439 | int err; | |
2440 | ||
dc012f36 | 2441 | write_lock_bh(&iml->sflock); |
cfcabdcc | 2442 | if (!iml->sflist) { |
1da177e4 | 2443 | /* any-source empty exclude case */ |
dc012f36 ED |
2444 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); |
2445 | } else { | |
2446 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2447 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2448 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2449 | iml->sflist = NULL; | |
1da177e4 | 2450 | } |
dc012f36 | 2451 | write_unlock_bh(&iml->sflock); |
1da177e4 LT |
2452 | return err; |
2453 | } | |
2454 | ||
2455 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2456 | { | |
6c567b78 | 2457 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2458 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2459 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2460 | ICMPV6_MGM_REDUCTION); | |
2461 | } else { | |
2462 | mld_add_delrec(ma->idev, ma); | |
2463 | mld_ifc_event(ma->idev); | |
2464 | } | |
2465 | } | |
2466 | ||
e99e88a9 | 2467 | static void mld_gq_timer_expire(struct timer_list *t) |
1da177e4 | 2468 | { |
e99e88a9 | 2469 | struct inet6_dev *idev = from_timer(idev, t, mc_gq_timer); |
1da177e4 LT |
2470 | |
2471 | idev->mc_gq_running = 0; | |
2472 | mld_send_report(idev, NULL); | |
9260d3e1 | 2473 | in6_dev_put(idev); |
1da177e4 LT |
2474 | } |
2475 | ||
e99e88a9 | 2476 | static void mld_ifc_timer_expire(struct timer_list *t) |
1da177e4 | 2477 | { |
e99e88a9 | 2478 | struct inet6_dev *idev = from_timer(idev, t, mc_ifc_timer); |
1da177e4 LT |
2479 | |
2480 | mld_send_cr(idev); | |
2481 | if (idev->mc_ifc_count) { | |
2482 | idev->mc_ifc_count--; | |
2483 | if (idev->mc_ifc_count) | |
6c6da928 HL |
2484 | mld_ifc_start_timer(idev, |
2485 | unsolicited_report_interval(idev)); | |
1da177e4 | 2486 | } |
9260d3e1 | 2487 | in6_dev_put(idev); |
1da177e4 LT |
2488 | } |
2489 | ||
2490 | static void mld_ifc_event(struct inet6_dev *idev) | |
2491 | { | |
6c567b78 | 2492 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2493 | return; |
2494 | idev->mc_ifc_count = idev->mc_qrv; | |
2495 | mld_ifc_start_timer(idev, 1); | |
2496 | } | |
2497 | ||
e99e88a9 | 2498 | static void igmp6_timer_handler(struct timer_list *t) |
1da177e4 | 2499 | { |
e99e88a9 | 2500 | struct ifmcaddr6 *ma = from_timer(ma, t, mca_timer); |
1da177e4 | 2501 | |
6c567b78 | 2502 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2503 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2504 | else | |
2505 | mld_send_report(ma->idev, ma); | |
2506 | ||
2507 | spin_lock(&ma->mca_lock); | |
2508 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2509 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2510 | spin_unlock(&ma->mca_lock); | |
2511 | ma_put(ma); | |
2512 | } | |
2513 | ||
75c78500 MS |
2514 | /* Device changing type */ |
2515 | ||
2516 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2517 | { | |
2518 | struct ifmcaddr6 *i; | |
2519 | ||
2520 | /* Install multicast list, except for all-nodes (already installed) */ | |
2521 | ||
2522 | read_lock_bh(&idev->lock); | |
2523 | for (i = idev->mc_list; i; i = i->next) | |
2524 | igmp6_group_dropped(i); | |
2525 | read_unlock_bh(&idev->lock); | |
2526 | } | |
2527 | ||
2528 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2529 | { | |
2530 | ipv6_mc_up(idev); | |
2531 | } | |
2532 | ||
1da177e4 LT |
2533 | /* Device going down */ |
2534 | ||
2535 | void ipv6_mc_down(struct inet6_dev *idev) | |
2536 | { | |
2537 | struct ifmcaddr6 *i; | |
2538 | ||
2539 | /* Withdraw multicast list */ | |
2540 | ||
2541 | read_lock_bh(&idev->lock); | |
1da177e4 | 2542 | |
67ba4152 | 2543 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 | 2544 | igmp6_group_dropped(i); |
1da177e4 | 2545 | |
1666d49e HL |
2546 | /* Should stop timer after group drop. or we will |
2547 | * start timer again in mld_ifc_event() | |
2548 | */ | |
2549 | mld_ifc_stop_timer(idev); | |
2550 | mld_gq_stop_timer(idev); | |
2551 | mld_dad_stop_timer(idev); | |
2552 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2553 | } |
2554 | ||
2f711939 HFS |
2555 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2556 | { | |
2557 | idev->mc_qrv = sysctl_mld_qrv; | |
2558 | idev->mc_qi = MLD_QI_DEFAULT; | |
2559 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2560 | idev->mc_v1_seen = 0; | |
2561 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2562 | } | |
1da177e4 LT |
2563 | |
2564 | /* Device going up */ | |
2565 | ||
2566 | void ipv6_mc_up(struct inet6_dev *idev) | |
2567 | { | |
2568 | struct ifmcaddr6 *i; | |
2569 | ||
2570 | /* Install multicast list, except for all-nodes (already installed) */ | |
2571 | ||
2572 | read_lock_bh(&idev->lock); | |
2f711939 | 2573 | ipv6_mc_reset(idev); |
1666d49e HL |
2574 | for (i = idev->mc_list; i; i = i->next) { |
2575 | mld_del_delrec(idev, i); | |
0ae0d60a | 2576 | igmp6_group_added(i); |
1666d49e | 2577 | } |
1da177e4 LT |
2578 | read_unlock_bh(&idev->lock); |
2579 | } | |
2580 | ||
2581 | /* IPv6 device initialization. */ | |
2582 | ||
2583 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2584 | { | |
1da177e4 | 2585 | write_lock_bh(&idev->lock); |
6457d26b | 2586 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2587 | idev->mc_gq_running = 0; |
e99e88a9 | 2588 | timer_setup(&idev->mc_gq_timer, mld_gq_timer_expire, 0); |
1da177e4 LT |
2589 | idev->mc_tomb = NULL; |
2590 | idev->mc_ifc_count = 0; | |
e99e88a9 KC |
2591 | timer_setup(&idev->mc_ifc_timer, mld_ifc_timer_expire, 0); |
2592 | timer_setup(&idev->mc_dad_timer, mld_dad_timer_expire, 0); | |
2f711939 | 2593 | ipv6_mc_reset(idev); |
1da177e4 | 2594 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2595 | } |
2596 | ||
2597 | /* | |
2598 | * Device is about to be destroyed: clean up. | |
2599 | */ | |
2600 | ||
2601 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2602 | { | |
2603 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2604 | |
2605 | /* Deactivate timers */ | |
2606 | ipv6_mc_down(idev); | |
1666d49e | 2607 | mld_clear_delrec(idev); |
1da177e4 LT |
2608 | |
2609 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2610 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2611 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2612 | * fail. | |
2613 | */ | |
f3ee4010 | 2614 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2615 | |
f3ee4010 YH |
2616 | if (idev->cnf.forwarding) |
2617 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2618 | |
2619 | write_lock_bh(&idev->lock); | |
2620 | while ((i = idev->mc_list) != NULL) { | |
2621 | idev->mc_list = i->next; | |
1da177e4 | 2622 | |
1666d49e | 2623 | write_unlock_bh(&idev->lock); |
1da177e4 | 2624 | ma_put(i); |
1da177e4 LT |
2625 | write_lock_bh(&idev->lock); |
2626 | } | |
2627 | write_unlock_bh(&idev->lock); | |
2628 | } | |
2629 | ||
382ed724 VY |
2630 | static void ipv6_mc_rejoin_groups(struct inet6_dev *idev) |
2631 | { | |
2632 | struct ifmcaddr6 *pmc; | |
2633 | ||
2634 | ASSERT_RTNL(); | |
2635 | ||
2636 | if (mld_in_v1_mode(idev)) { | |
2637 | read_lock_bh(&idev->lock); | |
2638 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) | |
2639 | igmp6_join_group(pmc); | |
2640 | read_unlock_bh(&idev->lock); | |
2641 | } else | |
2642 | mld_send_report(idev, NULL); | |
2643 | } | |
2644 | ||
2645 | static int ipv6_mc_netdev_event(struct notifier_block *this, | |
2646 | unsigned long event, | |
2647 | void *ptr) | |
2648 | { | |
2649 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
2650 | struct inet6_dev *idev = __in6_dev_get(dev); | |
2651 | ||
2652 | switch (event) { | |
2653 | case NETDEV_RESEND_IGMP: | |
2654 | if (idev) | |
2655 | ipv6_mc_rejoin_groups(idev); | |
2656 | break; | |
2657 | default: | |
2658 | break; | |
2659 | } | |
2660 | ||
2661 | return NOTIFY_DONE; | |
2662 | } | |
2663 | ||
2664 | static struct notifier_block igmp6_netdev_notifier = { | |
2665 | .notifier_call = ipv6_mc_netdev_event, | |
2666 | }; | |
2667 | ||
1da177e4 LT |
2668 | #ifdef CONFIG_PROC_FS |
2669 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2670 | struct seq_net_private p; |
1da177e4 LT |
2671 | struct net_device *dev; |
2672 | struct inet6_dev *idev; | |
2673 | }; | |
2674 | ||
2675 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2676 | ||
2677 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2678 | { | |
2679 | struct ifmcaddr6 *im = NULL; | |
2680 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2681 | struct net *net = seq_file_net(seq); |
1da177e4 | 2682 | |
7562f876 | 2683 | state->idev = NULL; |
ce81b76a | 2684 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2685 | struct inet6_dev *idev; |
ce81b76a | 2686 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2687 | if (!idev) |
2688 | continue; | |
2689 | read_lock_bh(&idev->lock); | |
2690 | im = idev->mc_list; | |
2691 | if (im) { | |
2692 | state->idev = idev; | |
2693 | break; | |
2694 | } | |
2695 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2696 | } |
2697 | return im; | |
2698 | } | |
2699 | ||
2700 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2701 | { | |
2702 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2703 | ||
2704 | im = im->next; | |
2705 | while (!im) { | |
53b24b8f | 2706 | if (likely(state->idev)) |
1da177e4 | 2707 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2708 | |
2709 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2710 | if (!state->dev) { |
2711 | state->idev = NULL; | |
2712 | break; | |
2713 | } | |
ce81b76a | 2714 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2715 | if (!state->idev) |
2716 | continue; | |
2717 | read_lock_bh(&state->idev->lock); | |
2718 | im = state->idev->mc_list; | |
2719 | } | |
2720 | return im; | |
2721 | } | |
2722 | ||
2723 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2724 | { | |
2725 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2726 | if (im) | |
2727 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2728 | --pos; | |
2729 | return pos ? NULL : im; | |
2730 | } | |
2731 | ||
2732 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2733 | __acquires(RCU) |
1da177e4 | 2734 | { |
ce81b76a | 2735 | rcu_read_lock(); |
1da177e4 LT |
2736 | return igmp6_mc_get_idx(seq, *pos); |
2737 | } | |
2738 | ||
2739 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2740 | { | |
ce81b76a ED |
2741 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2742 | ||
1da177e4 LT |
2743 | ++*pos; |
2744 | return im; | |
2745 | } | |
2746 | ||
2747 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2748 | __releases(RCU) |
1da177e4 LT |
2749 | { |
2750 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2751 | |
53b24b8f | 2752 | if (likely(state->idev)) { |
1da177e4 | 2753 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2754 | state->idev = NULL; |
2755 | } | |
2756 | state->dev = NULL; | |
ce81b76a | 2757 | rcu_read_unlock(); |
1da177e4 LT |
2758 | } |
2759 | ||
2760 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2761 | { | |
2762 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2763 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2764 | ||
2765 | seq_printf(seq, | |
4b7a4274 | 2766 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2767 | state->dev->ifindex, state->dev->name, |
b071195d | 2768 | &im->mca_addr, |
1da177e4 LT |
2769 | im->mca_users, im->mca_flags, |
2770 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2771 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2772 | return 0; | |
2773 | } | |
2774 | ||
56b3d975 | 2775 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2776 | .start = igmp6_mc_seq_start, |
2777 | .next = igmp6_mc_seq_next, | |
2778 | .stop = igmp6_mc_seq_stop, | |
2779 | .show = igmp6_mc_seq_show, | |
2780 | }; | |
2781 | ||
1da177e4 | 2782 | struct igmp6_mcf_iter_state { |
b8ad0cbc | 2783 | struct seq_net_private p; |
1da177e4 LT |
2784 | struct net_device *dev; |
2785 | struct inet6_dev *idev; | |
2786 | struct ifmcaddr6 *im; | |
2787 | }; | |
2788 | ||
2789 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2790 | ||
2791 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2792 | { | |
2793 | struct ip6_sf_list *psf = NULL; | |
2794 | struct ifmcaddr6 *im = NULL; | |
2795 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2796 | struct net *net = seq_file_net(seq); |
1da177e4 | 2797 | |
7562f876 PE |
2798 | state->idev = NULL; |
2799 | state->im = NULL; | |
ce81b76a | 2800 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2801 | struct inet6_dev *idev; |
ce81b76a | 2802 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2803 | if (unlikely(idev == NULL)) |
2804 | continue; | |
2805 | read_lock_bh(&idev->lock); | |
2806 | im = idev->mc_list; | |
53b24b8f | 2807 | if (likely(im)) { |
1da177e4 LT |
2808 | spin_lock_bh(&im->mca_lock); |
2809 | psf = im->mca_sources; | |
53b24b8f | 2810 | if (likely(psf)) { |
1da177e4 LT |
2811 | state->im = im; |
2812 | state->idev = idev; | |
2813 | break; | |
2814 | } | |
2815 | spin_unlock_bh(&im->mca_lock); | |
2816 | } | |
2817 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2818 | } |
2819 | return psf; | |
2820 | } | |
2821 | ||
2822 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2823 | { | |
2824 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2825 | ||
2826 | psf = psf->sf_next; | |
2827 | while (!psf) { | |
2828 | spin_unlock_bh(&state->im->mca_lock); | |
2829 | state->im = state->im->next; | |
2830 | while (!state->im) { | |
53b24b8f | 2831 | if (likely(state->idev)) |
1da177e4 | 2832 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2833 | |
2834 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2835 | if (!state->dev) { |
2836 | state->idev = NULL; | |
2837 | goto out; | |
2838 | } | |
ce81b76a | 2839 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2840 | if (!state->idev) |
2841 | continue; | |
2842 | read_lock_bh(&state->idev->lock); | |
2843 | state->im = state->idev->mc_list; | |
2844 | } | |
2845 | if (!state->im) | |
2846 | break; | |
2847 | spin_lock_bh(&state->im->mca_lock); | |
2848 | psf = state->im->mca_sources; | |
2849 | } | |
2850 | out: | |
2851 | return psf; | |
2852 | } | |
2853 | ||
2854 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2855 | { | |
2856 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2857 | if (psf) | |
2858 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2859 | --pos; | |
2860 | return pos ? NULL : psf; | |
2861 | } | |
2862 | ||
2863 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2864 | __acquires(RCU) |
1da177e4 | 2865 | { |
ce81b76a | 2866 | rcu_read_lock(); |
1da177e4 LT |
2867 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2868 | } | |
2869 | ||
2870 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2871 | { | |
2872 | struct ip6_sf_list *psf; | |
2873 | if (v == SEQ_START_TOKEN) | |
2874 | psf = igmp6_mcf_get_first(seq); | |
2875 | else | |
2876 | psf = igmp6_mcf_get_next(seq, v); | |
2877 | ++*pos; | |
2878 | return psf; | |
2879 | } | |
2880 | ||
2881 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2882 | __releases(RCU) |
1da177e4 LT |
2883 | { |
2884 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
53b24b8f | 2885 | if (likely(state->im)) { |
1da177e4 LT |
2886 | spin_unlock_bh(&state->im->mca_lock); |
2887 | state->im = NULL; | |
2888 | } | |
53b24b8f | 2889 | if (likely(state->idev)) { |
1da177e4 | 2890 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2891 | state->idev = NULL; |
2892 | } | |
2893 | state->dev = NULL; | |
ce81b76a | 2894 | rcu_read_unlock(); |
1da177e4 LT |
2895 | } |
2896 | ||
2897 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2898 | { | |
2899 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2900 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2901 | ||
2902 | if (v == SEQ_START_TOKEN) { | |
1744bea1 | 2903 | seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n"); |
1da177e4 LT |
2904 | } else { |
2905 | seq_printf(seq, | |
4b7a4274 | 2906 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2907 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2908 | &state->im->mca_addr, |
2909 | &psf->sf_addr, | |
1da177e4 LT |
2910 | psf->sf_count[MCAST_INCLUDE], |
2911 | psf->sf_count[MCAST_EXCLUDE]); | |
2912 | } | |
2913 | return 0; | |
2914 | } | |
2915 | ||
56b3d975 | 2916 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2917 | .start = igmp6_mcf_seq_start, |
2918 | .next = igmp6_mcf_seq_next, | |
2919 | .stop = igmp6_mcf_seq_stop, | |
2920 | .show = igmp6_mcf_seq_show, | |
2921 | }; | |
2922 | ||
2c8c1e72 | 2923 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2924 | { |
2925 | int err; | |
2926 | ||
2927 | err = -ENOMEM; | |
c3506372 CH |
2928 | if (!proc_create_net("igmp6", 0444, net->proc_net, &igmp6_mc_seq_ops, |
2929 | sizeof(struct igmp6_mc_iter_state))) | |
ea82edf7 | 2930 | goto out; |
c3506372 CH |
2931 | if (!proc_create_net("mcfilter6", 0444, net->proc_net, |
2932 | &igmp6_mcf_seq_ops, | |
2933 | sizeof(struct igmp6_mcf_iter_state))) | |
ea82edf7 DL |
2934 | goto out_proc_net_igmp6; |
2935 | ||
2936 | err = 0; | |
2937 | out: | |
2938 | return err; | |
2939 | ||
2940 | out_proc_net_igmp6: | |
ece31ffd | 2941 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2942 | goto out; |
2943 | } | |
2944 | ||
2c8c1e72 | 2945 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2946 | { |
ece31ffd G |
2947 | remove_proc_entry("mcfilter6", net->proc_net); |
2948 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2949 | } |
2950 | #else | |
2c8c1e72 | 2951 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2952 | { |
2953 | return 0; | |
2954 | } | |
2c8c1e72 | 2955 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2956 | { |
ea82edf7 | 2957 | } |
1da177e4 LT |
2958 | #endif |
2959 | ||
2c8c1e72 | 2960 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2961 | { |
1da177e4 LT |
2962 | int err; |
2963 | ||
1ed8516f DL |
2964 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2965 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2966 | if (err < 0) { |
f3213831 | 2967 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2968 | err); |
b8ad0cbc | 2969 | goto out; |
1da177e4 LT |
2970 | } |
2971 | ||
1ed8516f | 2972 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2973 | |
93a714d6 MC |
2974 | err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6, |
2975 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
2976 | if (err < 0) { | |
2977 | pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n", | |
2978 | err); | |
2979 | goto out_sock_create; | |
2980 | } | |
2981 | ||
ea82edf7 DL |
2982 | err = igmp6_proc_init(net); |
2983 | if (err) | |
93a714d6 MC |
2984 | goto out_sock_create_autojoin; |
2985 | ||
2986 | return 0; | |
b8ad0cbc | 2987 | |
93a714d6 MC |
2988 | out_sock_create_autojoin: |
2989 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); | |
b8ad0cbc | 2990 | out_sock_create: |
1ed8516f | 2991 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 MC |
2992 | out: |
2993 | return err; | |
1da177e4 LT |
2994 | } |
2995 | ||
2c8c1e72 | 2996 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2997 | { |
1ed8516f | 2998 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 | 2999 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); |
ea82edf7 | 3000 | igmp6_proc_exit(net); |
1da177e4 | 3001 | } |
b8ad0cbc DL |
3002 | |
3003 | static struct pernet_operations igmp6_net_ops = { | |
3004 | .init = igmp6_net_init, | |
3005 | .exit = igmp6_net_exit, | |
3006 | }; | |
3007 | ||
3008 | int __init igmp6_init(void) | |
3009 | { | |
3010 | return register_pernet_subsys(&igmp6_net_ops); | |
3011 | } | |
3012 | ||
382ed724 VY |
3013 | int __init igmp6_late_init(void) |
3014 | { | |
3015 | return register_netdevice_notifier(&igmp6_netdev_notifier); | |
3016 | } | |
3017 | ||
b8ad0cbc DL |
3018 | void igmp6_cleanup(void) |
3019 | { | |
3020 | unregister_pernet_subsys(&igmp6_net_ops); | |
3021 | } | |
382ed724 VY |
3022 | |
3023 | void igmp6_late_cleanup(void) | |
3024 | { | |
3025 | unregister_netdevice_notifier(&igmp6_netdev_notifier); | |
3026 | } |