Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Multicast support for IPv6 | |
1ab1457c | 4 | * Linux INET6 implementation |
1da177e4 LT |
5 | * |
6 | * Authors: | |
1ab1457c | 7 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 8 | * |
1ab1457c | 9 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
10 | */ |
11 | ||
12 | /* Changes: | |
13 | * | |
14 | * yoshfuji : fix format of router-alert option | |
15 | * YOSHIFUJI Hideaki @USAGI: | |
16 | * Fixed source address for MLD message based on | |
17 | * <draft-ietf-magma-mld-source-05.txt>. | |
18 | * YOSHIFUJI Hideaki @USAGI: | |
19 | * - Ignore Queries for invalid addresses. | |
20 | * - MLD for link-local addresses. | |
21 | * David L Stevens <dlstevens@us.ibm.com>: | |
22 | * - MLDv2 support | |
23 | */ | |
24 | ||
1da177e4 LT |
25 | #include <linux/module.h> |
26 | #include <linux/errno.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/socket.h> | |
30 | #include <linux/sockios.h> | |
31 | #include <linux/jiffies.h> | |
32 | #include <linux/times.h> | |
33 | #include <linux/net.h> | |
34 | #include <linux/in.h> | |
35 | #include <linux/in6.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/if_arp.h> | |
38 | #include <linux/route.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/proc_fs.h> | |
41 | #include <linux/seq_file.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
9d4a0314 | 43 | #include <linux/pkt_sched.h> |
6e7cb837 | 44 | #include <net/mld.h> |
1da177e4 LT |
45 | |
46 | #include <linux/netfilter.h> | |
47 | #include <linux/netfilter_ipv6.h> | |
48 | ||
457c4cbc | 49 | #include <net/net_namespace.h> |
1da177e4 LT |
50 | #include <net/sock.h> |
51 | #include <net/snmp.h> | |
52 | ||
53 | #include <net/ipv6.h> | |
54 | #include <net/protocol.h> | |
55 | #include <net/if_inet6.h> | |
56 | #include <net/ndisc.h> | |
57 | #include <net/addrconf.h> | |
58 | #include <net/ip6_route.h> | |
1ed8516f | 59 | #include <net/inet_common.h> |
1da177e4 LT |
60 | |
61 | #include <net/ip6_checksum.h> | |
62 | ||
6e7cb837 | 63 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
32b395a1 MY |
64 | static int __mld2_query_bugs[] __attribute__((__unused__)) = { |
65 | BUILD_BUG_ON_ZERO(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
66 | BUILD_BUG_ON_ZERO(offsetof(struct mld2_report, mld2r_grec) % 4), | |
67 | BUILD_BUG_ON_ZERO(offsetof(struct mld2_grec, grec_mca) % 4) | |
1da177e4 LT |
68 | }; |
69 | ||
70 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
71 | ||
1da177e4 LT |
72 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
73 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
e99e88a9 | 74 | static void igmp6_timer_handler(struct timer_list *t); |
1da177e4 | 75 | |
e99e88a9 KC |
76 | static void mld_gq_timer_expire(struct timer_list *t); |
77 | static void mld_ifc_timer_expire(struct timer_list *t); | |
1da177e4 LT |
78 | static void mld_ifc_event(struct inet6_dev *idev); |
79 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
1666d49e | 80 | static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); |
1da177e4 | 81 | static void mld_clear_delrec(struct inet6_dev *idev); |
6c567b78 | 82 | static bool mld_in_v1_mode(const struct inet6_dev *idev); |
1da177e4 LT |
83 | static int sf_setstate(struct ifmcaddr6 *pmc); |
84 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
85 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
b71d1d42 ED |
86 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
87 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 | 88 | int delta); |
b71d1d42 ED |
89 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
90 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
91 | int delta); |
92 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
93 | struct inet6_dev *idev); | |
c7ea20c9 HL |
94 | static int __ipv6_dev_mc_inc(struct net_device *dev, |
95 | const struct in6_addr *addr, unsigned int mode); | |
1da177e4 | 96 | |
1da177e4 | 97 | #define MLD_QRV_DEFAULT 2 |
89225d1c DB |
98 | /* RFC3810, 9.2. Query Interval */ |
99 | #define MLD_QI_DEFAULT (125 * HZ) | |
100 | /* RFC3810, 9.3. Query Response Interval */ | |
101 | #define MLD_QRI_DEFAULT (10 * HZ) | |
1da177e4 | 102 | |
9fd07841 DB |
103 | /* RFC3810, 8.1 Query Version Distinctions */ |
104 | #define MLD_V1_QUERY_LEN 24 | |
105 | #define MLD_V2_QUERY_LEN_MIN 28 | |
106 | ||
6f4353d8 | 107 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 108 | |
ab32ea5d | 109 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
2f711939 | 110 | int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT; |
1da177e4 LT |
111 | |
112 | /* | |
113 | * socket join on multicast group | |
114 | */ | |
115 | ||
456b61bc ED |
116 | #define for_each_pmc_rcu(np, pmc) \ |
117 | for (pmc = rcu_dereference(np->ipv6_mc_list); \ | |
118 | pmc != NULL; \ | |
119 | pmc = rcu_dereference(pmc->next)) | |
120 | ||
fc4eba58 HFS |
121 | static int unsolicited_report_interval(struct inet6_dev *idev) |
122 | { | |
123 | int iv; | |
124 | ||
6c567b78 | 125 | if (mld_in_v1_mode(idev)) |
fc4eba58 HFS |
126 | iv = idev->cnf.mldv1_unsolicited_report_interval; |
127 | else | |
128 | iv = idev->cnf.mldv2_unsolicited_report_interval; | |
129 | ||
130 | return iv > 0 ? iv : 1; | |
131 | } | |
132 | ||
c7ea20c9 HL |
133 | static int __ipv6_sock_mc_join(struct sock *sk, int ifindex, |
134 | const struct in6_addr *addr, unsigned int mode) | |
1da177e4 LT |
135 | { |
136 | struct net_device *dev = NULL; | |
137 | struct ipv6_mc_socklist *mc_lst; | |
138 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 139 | struct net *net = sock_net(sk); |
1da177e4 LT |
140 | int err; |
141 | ||
46a4dee0 MC |
142 | ASSERT_RTNL(); |
143 | ||
1da177e4 LT |
144 | if (!ipv6_addr_is_multicast(addr)) |
145 | return -EINVAL; | |
146 | ||
456b61bc ED |
147 | rcu_read_lock(); |
148 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
149 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
150 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 151 | rcu_read_unlock(); |
c9e3e8b6 DS |
152 | return -EADDRINUSE; |
153 | } | |
154 | } | |
456b61bc | 155 | rcu_read_unlock(); |
c9e3e8b6 | 156 | |
1da177e4 LT |
157 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
158 | ||
63159f29 | 159 | if (!mc_lst) |
1da177e4 LT |
160 | return -ENOMEM; |
161 | ||
162 | mc_lst->next = NULL; | |
4e3fd7a0 | 163 | mc_lst->addr = *addr; |
1da177e4 LT |
164 | |
165 | if (ifindex == 0) { | |
166 | struct rt6_info *rt; | |
b75cc8f9 | 167 | rt = rt6_lookup(net, addr, NULL, 0, NULL, 0); |
1da177e4 | 168 | if (rt) { |
d1918542 | 169 | dev = rt->dst.dev; |
94e187c0 | 170 | ip6_rt_put(rt); |
1da177e4 LT |
171 | } |
172 | } else | |
414b6c94 | 173 | dev = __dev_get_by_index(net, ifindex); |
1da177e4 | 174 | |
63159f29 | 175 | if (!dev) { |
1da177e4 LT |
176 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
177 | return -ENODEV; | |
178 | } | |
179 | ||
180 | mc_lst->ifindex = dev->ifindex; | |
c7ea20c9 | 181 | mc_lst->sfmode = mode; |
196433c5 | 182 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
183 | mc_lst->sflist = NULL; |
184 | ||
185 | /* | |
186 | * now add/increase the group membership on the device | |
187 | */ | |
188 | ||
c7ea20c9 | 189 | err = __ipv6_dev_mc_inc(dev, addr, mode); |
1da177e4 LT |
190 | |
191 | if (err) { | |
192 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
1da177e4 LT |
193 | return err; |
194 | } | |
195 | ||
1da177e4 | 196 | mc_lst->next = np->ipv6_mc_list; |
456b61bc | 197 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
1da177e4 | 198 | |
46a4dee0 MC |
199 | return 0; |
200 | } | |
c7ea20c9 HL |
201 | |
202 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) | |
203 | { | |
204 | return __ipv6_sock_mc_join(sk, ifindex, addr, MCAST_EXCLUDE); | |
205 | } | |
46a4dee0 | 206 | EXPORT_SYMBOL(ipv6_sock_mc_join); |
1da177e4 | 207 | |
c7ea20c9 HL |
208 | int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex, |
209 | const struct in6_addr *addr, unsigned int mode) | |
210 | { | |
211 | return __ipv6_sock_mc_join(sk, ifindex, addr, mode); | |
212 | } | |
213 | ||
1da177e4 LT |
214 | /* |
215 | * socket leave on multicast group | |
216 | */ | |
54ff9ef3 | 217 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
218 | { |
219 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
220 | struct ipv6_mc_socklist *mc_lst; |
221 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 222 | struct net *net = sock_net(sk); |
1da177e4 | 223 | |
46a4dee0 MC |
224 | ASSERT_RTNL(); |
225 | ||
a858d64b LW |
226 | if (!ipv6_addr_is_multicast(addr)) |
227 | return -EINVAL; | |
228 | ||
456b61bc | 229 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 230 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 231 | lnk = &mc_lst->next) { |
1da177e4 LT |
232 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
233 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
234 | struct net_device *dev; | |
235 | ||
236 | *lnk = mc_lst->next; | |
1da177e4 | 237 | |
414b6c94 | 238 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
53b24b8f | 239 | if (dev) { |
96b52e61 | 240 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 241 | |
acd6e00b | 242 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 243 | if (idev) |
1da177e4 | 244 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
245 | } else |
246 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 | 247 | |
456b61bc | 248 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 249 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
250 | return 0; |
251 | } | |
252 | } | |
1da177e4 | 253 | |
9951f036 | 254 | return -EADDRNOTAVAIL; |
1da177e4 | 255 | } |
46a4dee0 | 256 | EXPORT_SYMBOL(ipv6_sock_mc_drop); |
1da177e4 | 257 | |
96b52e61 ED |
258 | /* called with rcu_read_lock() */ |
259 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 260 | const struct in6_addr *group, |
96b52e61 | 261 | int ifindex) |
1da177e4 LT |
262 | { |
263 | struct net_device *dev = NULL; | |
264 | struct inet6_dev *idev = NULL; | |
265 | ||
266 | if (ifindex == 0) { | |
b75cc8f9 | 267 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, NULL, 0); |
1da177e4 | 268 | |
1da177e4 | 269 | if (rt) { |
d1918542 | 270 | dev = rt->dst.dev; |
94e187c0 | 271 | ip6_rt_put(rt); |
1da177e4 LT |
272 | } |
273 | } else | |
96b52e61 | 274 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
275 | |
276 | if (!dev) | |
96b52e61 ED |
277 | return NULL; |
278 | idev = __in6_dev_get(dev); | |
448eb71f | 279 | if (!idev) |
8a22c99a | 280 | return NULL; |
1da177e4 | 281 | read_lock_bh(&idev->lock); |
96b52e61 ED |
282 | if (idev->dead) { |
283 | read_unlock_bh(&idev->lock); | |
284 | return NULL; | |
285 | } | |
1da177e4 LT |
286 | return idev; |
287 | } | |
288 | ||
8651be8f | 289 | void __ipv6_sock_mc_close(struct sock *sk) |
1da177e4 LT |
290 | { |
291 | struct ipv6_pinfo *np = inet6_sk(sk); | |
292 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 293 | struct net *net = sock_net(sk); |
1da177e4 | 294 | |
8651be8f | 295 | ASSERT_RTNL(); |
0e1efe9d | 296 | |
b5350916 | 297 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
298 | struct net_device *dev; |
299 | ||
300 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 301 | |
414b6c94 | 302 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 303 | if (dev) { |
96b52e61 | 304 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 305 | |
acd6e00b | 306 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 307 | if (idev) |
1da177e4 | 308 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
309 | } else |
310 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 311 | |
456b61bc | 312 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 313 | kfree_rcu(mc_lst, rcu); |
1da177e4 | 314 | } |
8651be8f WC |
315 | } |
316 | ||
317 | void ipv6_sock_mc_close(struct sock *sk) | |
318 | { | |
319 | struct ipv6_pinfo *np = inet6_sk(sk); | |
320 | ||
321 | if (!rcu_access_pointer(np->ipv6_mc_list)) | |
322 | return; | |
323 | rtnl_lock(); | |
324 | __ipv6_sock_mc_close(sk); | |
a9ed4a29 | 325 | rtnl_unlock(); |
1da177e4 LT |
326 | } |
327 | ||
328 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
329 | struct group_source_req *pgsr) | |
330 | { | |
331 | struct in6_addr *source, *group; | |
332 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
333 | struct inet6_dev *idev; |
334 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
335 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 336 | struct net *net = sock_net(sk); |
1da177e4 | 337 | int i, j, rv; |
c9e3e8b6 | 338 | int leavegroup = 0; |
5ab4a6c8 | 339 | int pmclocked = 0; |
1da177e4 LT |
340 | int err; |
341 | ||
1da177e4 LT |
342 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
343 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
344 | ||
345 | if (!ipv6_addr_is_multicast(group)) | |
346 | return -EINVAL; | |
347 | ||
96b52e61 ED |
348 | rcu_read_lock(); |
349 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
350 | if (!idev) { | |
351 | rcu_read_unlock(); | |
1da177e4 | 352 | return -ENODEV; |
96b52e61 | 353 | } |
1da177e4 LT |
354 | |
355 | err = -EADDRNOTAVAIL; | |
356 | ||
456b61bc | 357 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
358 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
359 | continue; | |
360 | if (ipv6_addr_equal(&pmc->addr, group)) | |
361 | break; | |
362 | } | |
917f2f10 DS |
363 | if (!pmc) { /* must have a prior join */ |
364 | err = -EINVAL; | |
1da177e4 | 365 | goto done; |
917f2f10 | 366 | } |
1da177e4 LT |
367 | /* if a source filter was set, must be the same mode as before */ |
368 | if (pmc->sflist) { | |
917f2f10 DS |
369 | if (pmc->sfmode != omode) { |
370 | err = -EINVAL; | |
1da177e4 | 371 | goto done; |
917f2f10 | 372 | } |
1da177e4 LT |
373 | } else if (pmc->sfmode != omode) { |
374 | /* allow mode switches for empty-set filters */ | |
375 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
376 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
377 | pmc->sfmode = omode; | |
378 | } | |
379 | ||
96b52e61 | 380 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
381 | pmclocked = 1; |
382 | ||
1da177e4 LT |
383 | psl = pmc->sflist; |
384 | if (!add) { | |
385 | if (!psl) | |
917f2f10 | 386 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 387 | rv = !0; |
67ba4152 | 388 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 389 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
390 | if (rv == 0) |
391 | break; | |
392 | } | |
393 | if (rv) /* source not found */ | |
917f2f10 | 394 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 395 | |
c9e3e8b6 DS |
396 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
397 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
398 | leavegroup = 1; | |
399 | goto done; | |
400 | } | |
401 | ||
1da177e4 LT |
402 | /* update the interface filter */ |
403 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
404 | ||
67ba4152 | 405 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
406 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
407 | psl->sl_count--; | |
408 | err = 0; | |
409 | goto done; | |
410 | } | |
411 | /* else, add a new source to the filter */ | |
412 | ||
413 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
414 | err = -ENOBUFS; | |
415 | goto done; | |
416 | } | |
417 | if (!psl || psl->sl_count == psl->sl_max) { | |
418 | struct ip6_sf_socklist *newpsl; | |
419 | int count = IP6_SFBLOCK; | |
420 | ||
421 | if (psl) | |
422 | count += psl->sl_max; | |
8b3a7005 | 423 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
424 | if (!newpsl) { |
425 | err = -ENOBUFS; | |
426 | goto done; | |
427 | } | |
428 | newpsl->sl_max = count; | |
429 | newpsl->sl_count = count - IP6_SFBLOCK; | |
430 | if (psl) { | |
67ba4152 | 431 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
432 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
433 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
434 | } | |
435 | pmc->sflist = psl = newpsl; | |
436 | } | |
437 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 438 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 439 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
440 | if (rv == 0) /* There is an error in the address. */ |
441 | goto done; | |
1da177e4 | 442 | } |
67ba4152 | 443 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
444 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
445 | psl->sl_addr[i] = *source; | |
446 | psl->sl_count++; | |
447 | err = 0; | |
448 | /* update the interface list */ | |
449 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
450 | done: | |
5ab4a6c8 | 451 | if (pmclocked) |
96b52e61 | 452 | write_unlock(&pmc->sflock); |
1da177e4 | 453 | read_unlock_bh(&idev->lock); |
96b52e61 | 454 | rcu_read_unlock(); |
c9e3e8b6 | 455 | if (leavegroup) |
54ff9ef3 | 456 | err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); |
1da177e4 LT |
457 | return err; |
458 | } | |
459 | ||
460 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
461 | { | |
b71d1d42 | 462 | const struct in6_addr *group; |
1da177e4 | 463 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
464 | struct inet6_dev *idev; |
465 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
466 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 467 | struct net *net = sock_net(sk); |
9951f036 | 468 | int leavegroup = 0; |
1da177e4 LT |
469 | int i, err; |
470 | ||
471 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
472 | ||
473 | if (!ipv6_addr_is_multicast(group)) | |
474 | return -EINVAL; | |
475 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
476 | gsf->gf_fmode != MCAST_EXCLUDE) | |
477 | return -EINVAL; | |
478 | ||
96b52e61 ED |
479 | rcu_read_lock(); |
480 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 481 | |
96b52e61 ED |
482 | if (!idev) { |
483 | rcu_read_unlock(); | |
1da177e4 | 484 | return -ENODEV; |
96b52e61 | 485 | } |
1da177e4 | 486 | |
9c05989b | 487 | err = 0; |
5ab4a6c8 | 488 | |
9951f036 DS |
489 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
490 | leavegroup = 1; | |
491 | goto done; | |
492 | } | |
493 | ||
456b61bc | 494 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
495 | if (pmc->ifindex != gsf->gf_interface) |
496 | continue; | |
497 | if (ipv6_addr_equal(&pmc->addr, group)) | |
498 | break; | |
499 | } | |
917f2f10 DS |
500 | if (!pmc) { /* must have a prior join */ |
501 | err = -EINVAL; | |
1da177e4 | 502 | goto done; |
917f2f10 | 503 | } |
1da177e4 | 504 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
505 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
506 | GFP_ATOMIC); | |
1da177e4 LT |
507 | if (!newpsl) { |
508 | err = -ENOBUFS; | |
509 | goto done; | |
510 | } | |
511 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 512 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
513 | struct sockaddr_in6 *psin6; |
514 | ||
515 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
516 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
517 | } | |
518 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
519 | newpsl->sl_count, newpsl->sl_addr, 0); | |
520 | if (err) { | |
521 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
522 | goto done; | |
523 | } | |
8713dbf0 | 524 | } else { |
1da177e4 | 525 | newpsl = NULL; |
8713dbf0 YZ |
526 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
527 | } | |
5ab4a6c8 | 528 | |
96b52e61 | 529 | write_lock(&pmc->sflock); |
1da177e4 LT |
530 | psl = pmc->sflist; |
531 | if (psl) { | |
532 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
533 | psl->sl_count, psl->sl_addr, 0); | |
534 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
535 | } else | |
536 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
537 | pmc->sflist = newpsl; | |
538 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 539 | write_unlock(&pmc->sflock); |
917f2f10 | 540 | err = 0; |
1da177e4 LT |
541 | done: |
542 | read_unlock_bh(&idev->lock); | |
96b52e61 | 543 | rcu_read_unlock(); |
9951f036 DS |
544 | if (leavegroup) |
545 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
546 | return err; |
547 | } | |
548 | ||
549 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
550 | struct group_filter __user *optval, int __user *optlen) | |
551 | { | |
552 | int err, i, count, copycount; | |
b71d1d42 | 553 | const struct in6_addr *group; |
1da177e4 LT |
554 | struct ipv6_mc_socklist *pmc; |
555 | struct inet6_dev *idev; | |
1da177e4 LT |
556 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
557 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 558 | struct net *net = sock_net(sk); |
1da177e4 LT |
559 | |
560 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
561 | ||
562 | if (!ipv6_addr_is_multicast(group)) | |
563 | return -EINVAL; | |
564 | ||
96b52e61 ED |
565 | rcu_read_lock(); |
566 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 567 | |
96b52e61 ED |
568 | if (!idev) { |
569 | rcu_read_unlock(); | |
1da177e4 | 570 | return -ENODEV; |
96b52e61 | 571 | } |
1da177e4 LT |
572 | |
573 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
574 | /* changes to the ipv6_mc_list require the socket lock and |
575 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
576 | * so reading the list is safe. |
577 | */ | |
1da177e4 | 578 | |
456b61bc | 579 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
580 | if (pmc->ifindex != gsf->gf_interface) |
581 | continue; | |
582 | if (ipv6_addr_equal(group, &pmc->addr)) | |
583 | break; | |
584 | } | |
585 | if (!pmc) /* must have a prior join */ | |
586 | goto done; | |
587 | gsf->gf_fmode = pmc->sfmode; | |
588 | psl = pmc->sflist; | |
589 | count = psl ? psl->sl_count : 0; | |
590 | read_unlock_bh(&idev->lock); | |
96b52e61 | 591 | rcu_read_unlock(); |
1da177e4 LT |
592 | |
593 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
594 | gsf->gf_numsrc = count; | |
595 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
596 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
597 | return -EFAULT; | |
598 | } | |
f7ed925c WC |
599 | /* changes to psl require the socket lock, and a write lock |
600 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 601 | */ |
67ba4152 | 602 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
603 | struct sockaddr_in6 *psin6; |
604 | struct sockaddr_storage ss; | |
605 | ||
606 | psin6 = (struct sockaddr_in6 *)&ss; | |
607 | memset(&ss, 0, sizeof(ss)); | |
608 | psin6->sin6_family = AF_INET6; | |
609 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 610 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
611 | return -EFAULT; |
612 | } | |
613 | return 0; | |
614 | done: | |
615 | read_unlock_bh(&idev->lock); | |
96b52e61 | 616 | rcu_read_unlock(); |
1da177e4 LT |
617 | return err; |
618 | } | |
619 | ||
a50feda5 ED |
620 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
621 | const struct in6_addr *src_addr) | |
1da177e4 LT |
622 | { |
623 | struct ipv6_pinfo *np = inet6_sk(sk); | |
624 | struct ipv6_mc_socklist *mc; | |
625 | struct ip6_sf_socklist *psl; | |
a50feda5 | 626 | bool rv = true; |
1da177e4 | 627 | |
456b61bc ED |
628 | rcu_read_lock(); |
629 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
630 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
631 | break; | |
632 | } | |
633 | if (!mc) { | |
456b61bc | 634 | rcu_read_unlock(); |
15033f04 | 635 | return np->mc_all; |
1da177e4 | 636 | } |
5ab4a6c8 | 637 | read_lock(&mc->sflock); |
1da177e4 LT |
638 | psl = mc->sflist; |
639 | if (!psl) { | |
640 | rv = mc->sfmode == MCAST_EXCLUDE; | |
641 | } else { | |
642 | int i; | |
643 | ||
67ba4152 | 644 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
645 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
646 | break; | |
647 | } | |
648 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 649 | rv = false; |
1da177e4 | 650 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 651 | rv = false; |
1da177e4 | 652 | } |
5ab4a6c8 | 653 | read_unlock(&mc->sflock); |
456b61bc | 654 | rcu_read_unlock(); |
1da177e4 LT |
655 | |
656 | return rv; | |
657 | } | |
658 | ||
0ae0d60a | 659 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
1da177e4 LT |
660 | { |
661 | struct net_device *dev = mc->idev->dev; | |
662 | char buf[MAX_ADDR_LEN]; | |
663 | ||
ec16ef22 YH |
664 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
665 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
666 | return; | |
667 | ||
1da177e4 LT |
668 | spin_lock_bh(&mc->mca_lock); |
669 | if (!(mc->mca_flags&MAF_LOADED)) { | |
670 | mc->mca_flags |= MAF_LOADED; | |
671 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 672 | dev_mc_add(dev, buf); |
1da177e4 LT |
673 | } |
674 | spin_unlock_bh(&mc->mca_lock); | |
675 | ||
676 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
677 | return; | |
678 | ||
6c567b78 | 679 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
680 | igmp6_join_group(mc); |
681 | return; | |
682 | } | |
683 | /* else v2 */ | |
684 | ||
c7ea20c9 HL |
685 | /* Based on RFC3810 6.1, for newly added INCLUDE SSM, we |
686 | * should not send filter-mode change record as the mode | |
687 | * should be from IN() to IN(A). | |
688 | */ | |
0ae0d60a | 689 | if (mc->mca_sfmode == MCAST_EXCLUDE) |
c7ea20c9 HL |
690 | mc->mca_crcount = mc->idev->mc_qrv; |
691 | ||
1da177e4 LT |
692 | mld_ifc_event(mc->idev); |
693 | } | |
694 | ||
695 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
696 | { | |
697 | struct net_device *dev = mc->idev->dev; | |
698 | char buf[MAX_ADDR_LEN]; | |
699 | ||
ec16ef22 YH |
700 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
701 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
702 | return; | |
703 | ||
1da177e4 LT |
704 | spin_lock_bh(&mc->mca_lock); |
705 | if (mc->mca_flags&MAF_LOADED) { | |
706 | mc->mca_flags &= ~MAF_LOADED; | |
707 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 708 | dev_mc_del(dev, buf); |
1da177e4 LT |
709 | } |
710 | ||
1da177e4 | 711 | spin_unlock_bh(&mc->mca_lock); |
1666d49e HL |
712 | if (mc->mca_flags & MAF_NOREPORT) |
713 | return; | |
1da177e4 LT |
714 | |
715 | if (!mc->idev->dead) | |
716 | igmp6_leave_group(mc); | |
717 | ||
718 | spin_lock_bh(&mc->mca_lock); | |
719 | if (del_timer(&mc->mca_timer)) | |
d3981bc6 | 720 | refcount_dec(&mc->mca_refcnt); |
1da177e4 LT |
721 | spin_unlock_bh(&mc->mca_lock); |
722 | } | |
723 | ||
724 | /* | |
725 | * deleted ifmcaddr6 manipulation | |
726 | */ | |
727 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
728 | { | |
729 | struct ifmcaddr6 *pmc; | |
730 | ||
731 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
732 | * are actually used. In particular, the refcnt and users are not | |
733 | * used for management of the delete list. Using the same structure | |
734 | * for deleted items allows change reports to use common code with | |
735 | * non-deleted or query-response MCA's. | |
736 | */ | |
0c600eda | 737 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
738 | if (!pmc) |
739 | return; | |
0c600eda | 740 | |
1da177e4 LT |
741 | spin_lock_bh(&im->mca_lock); |
742 | spin_lock_init(&pmc->mca_lock); | |
743 | pmc->idev = im->idev; | |
744 | in6_dev_hold(idev); | |
745 | pmc->mca_addr = im->mca_addr; | |
746 | pmc->mca_crcount = idev->mc_qrv; | |
747 | pmc->mca_sfmode = im->mca_sfmode; | |
748 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
749 | struct ip6_sf_list *psf; | |
750 | ||
751 | pmc->mca_tomb = im->mca_tomb; | |
752 | pmc->mca_sources = im->mca_sources; | |
753 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 754 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
755 | psf->sf_crcount = pmc->mca_crcount; |
756 | } | |
757 | spin_unlock_bh(&im->mca_lock); | |
758 | ||
6457d26b | 759 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
760 | pmc->next = idev->mc_tomb; |
761 | idev->mc_tomb = pmc; | |
6457d26b | 762 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
763 | } |
764 | ||
1666d49e | 765 | static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) |
1da177e4 LT |
766 | { |
767 | struct ifmcaddr6 *pmc, *pmc_prev; | |
1666d49e HL |
768 | struct ip6_sf_list *psf; |
769 | struct in6_addr *pmca = &im->mca_addr; | |
1da177e4 | 770 | |
6457d26b | 771 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 772 | pmc_prev = NULL; |
67ba4152 | 773 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
774 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
775 | break; | |
776 | pmc_prev = pmc; | |
777 | } | |
778 | if (pmc) { | |
779 | if (pmc_prev) | |
780 | pmc_prev->next = pmc->next; | |
781 | else | |
782 | idev->mc_tomb = pmc->next; | |
783 | } | |
6457d26b SH |
784 | spin_unlock_bh(&idev->mc_lock); |
785 | ||
1666d49e | 786 | spin_lock_bh(&im->mca_lock); |
1da177e4 | 787 | if (pmc) { |
1666d49e | 788 | im->idev = pmc->idev; |
08d3ffcc | 789 | if (im->mca_sfmode == MCAST_INCLUDE) { |
a84d0164 ED |
790 | swap(im->mca_tomb, pmc->mca_tomb); |
791 | swap(im->mca_sources, pmc->mca_sources); | |
1666d49e | 792 | for (psf = im->mca_sources; psf; psf = psf->sf_next) |
c7ea20c9 HL |
793 | psf->sf_crcount = idev->mc_qrv; |
794 | } else { | |
795 | im->mca_crcount = idev->mc_qrv; | |
1da177e4 LT |
796 | } |
797 | in6_dev_put(pmc->idev); | |
a84d0164 | 798 | ip6_mc_clear_src(pmc); |
9c8bb163 | 799 | kfree(pmc); |
1da177e4 | 800 | } |
1666d49e | 801 | spin_unlock_bh(&im->mca_lock); |
1da177e4 LT |
802 | } |
803 | ||
804 | static void mld_clear_delrec(struct inet6_dev *idev) | |
805 | { | |
806 | struct ifmcaddr6 *pmc, *nextpmc; | |
807 | ||
6457d26b | 808 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
809 | pmc = idev->mc_tomb; |
810 | idev->mc_tomb = NULL; | |
6457d26b | 811 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
812 | |
813 | for (; pmc; pmc = nextpmc) { | |
814 | nextpmc = pmc->next; | |
815 | ip6_mc_clear_src(pmc); | |
816 | in6_dev_put(pmc->idev); | |
817 | kfree(pmc); | |
818 | } | |
819 | ||
820 | /* clear dead sources, too */ | |
821 | read_lock_bh(&idev->lock); | |
67ba4152 | 822 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
823 | struct ip6_sf_list *psf, *psf_next; |
824 | ||
825 | spin_lock_bh(&pmc->mca_lock); | |
826 | psf = pmc->mca_tomb; | |
827 | pmc->mca_tomb = NULL; | |
828 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 829 | for (; psf; psf = psf_next) { |
1da177e4 LT |
830 | psf_next = psf->sf_next; |
831 | kfree(psf); | |
832 | } | |
833 | } | |
834 | read_unlock_bh(&idev->lock); | |
835 | } | |
836 | ||
1691c63e WC |
837 | static void mca_get(struct ifmcaddr6 *mc) |
838 | { | |
d3981bc6 | 839 | refcount_inc(&mc->mca_refcnt); |
1691c63e WC |
840 | } |
841 | ||
842 | static void ma_put(struct ifmcaddr6 *mc) | |
843 | { | |
d3981bc6 | 844 | if (refcount_dec_and_test(&mc->mca_refcnt)) { |
1691c63e WC |
845 | in6_dev_put(mc->idev); |
846 | kfree(mc); | |
847 | } | |
848 | } | |
849 | ||
850 | static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev, | |
c7ea20c9 HL |
851 | const struct in6_addr *addr, |
852 | unsigned int mode) | |
1691c63e WC |
853 | { |
854 | struct ifmcaddr6 *mc; | |
855 | ||
856 | mc = kzalloc(sizeof(*mc), GFP_ATOMIC); | |
63159f29 | 857 | if (!mc) |
1691c63e WC |
858 | return NULL; |
859 | ||
e99e88a9 | 860 | timer_setup(&mc->mca_timer, igmp6_timer_handler, 0); |
1691c63e WC |
861 | |
862 | mc->mca_addr = *addr; | |
863 | mc->idev = idev; /* reference taken by caller */ | |
864 | mc->mca_users = 1; | |
865 | /* mca_stamp should be updated upon changes */ | |
866 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
d3981bc6 | 867 | refcount_set(&mc->mca_refcnt, 1); |
1691c63e WC |
868 | spin_lock_init(&mc->mca_lock); |
869 | ||
c7ea20c9 HL |
870 | mc->mca_sfmode = mode; |
871 | mc->mca_sfcount[mode] = 1; | |
1691c63e WC |
872 | |
873 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
874 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
875 | mc->mca_flags |= MAF_NOREPORT; | |
876 | ||
877 | return mc; | |
878 | } | |
1da177e4 LT |
879 | |
880 | /* | |
881 | * device multicast group inc (add if not found) | |
882 | */ | |
c7ea20c9 HL |
883 | static int __ipv6_dev_mc_inc(struct net_device *dev, |
884 | const struct in6_addr *addr, unsigned int mode) | |
1da177e4 LT |
885 | { |
886 | struct ifmcaddr6 *mc; | |
887 | struct inet6_dev *idev; | |
888 | ||
a9ed4a29 SD |
889 | ASSERT_RTNL(); |
890 | ||
96b52e61 | 891 | /* we need to take a reference on idev */ |
1da177e4 LT |
892 | idev = in6_dev_get(dev); |
893 | ||
63159f29 | 894 | if (!idev) |
1da177e4 LT |
895 | return -EINVAL; |
896 | ||
897 | write_lock_bh(&idev->lock); | |
898 | if (idev->dead) { | |
899 | write_unlock_bh(&idev->lock); | |
900 | in6_dev_put(idev); | |
901 | return -ENODEV; | |
902 | } | |
903 | ||
904 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
905 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
906 | mc->mca_users++; | |
907 | write_unlock_bh(&idev->lock); | |
c7ea20c9 | 908 | ip6_mc_add_src(idev, &mc->mca_addr, mode, 0, NULL, 0); |
1da177e4 LT |
909 | in6_dev_put(idev); |
910 | return 0; | |
911 | } | |
912 | } | |
913 | ||
c7ea20c9 | 914 | mc = mca_alloc(idev, addr, mode); |
1691c63e | 915 | if (!mc) { |
1da177e4 LT |
916 | write_unlock_bh(&idev->lock); |
917 | in6_dev_put(idev); | |
918 | return -ENOMEM; | |
919 | } | |
920 | ||
1da177e4 LT |
921 | mc->next = idev->mc_list; |
922 | idev->mc_list = mc; | |
1691c63e WC |
923 | |
924 | /* Hold this for the code below before we unlock, | |
925 | * it is already exposed via idev->mc_list. | |
926 | */ | |
927 | mca_get(mc); | |
1da177e4 LT |
928 | write_unlock_bh(&idev->lock); |
929 | ||
1666d49e | 930 | mld_del_delrec(idev, mc); |
0ae0d60a | 931 | igmp6_group_added(mc); |
1da177e4 LT |
932 | ma_put(mc); |
933 | return 0; | |
934 | } | |
935 | ||
c7ea20c9 HL |
936 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
937 | { | |
938 | return __ipv6_dev_mc_inc(dev, addr, MCAST_EXCLUDE); | |
939 | } | |
4effd28c | 940 | EXPORT_SYMBOL(ipv6_dev_mc_inc); |
c7ea20c9 | 941 | |
1da177e4 LT |
942 | /* |
943 | * device multicast group del | |
944 | */ | |
9acd9f3a | 945 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
946 | { |
947 | struct ifmcaddr6 *ma, **map; | |
948 | ||
a9ed4a29 SD |
949 | ASSERT_RTNL(); |
950 | ||
1da177e4 | 951 | write_lock_bh(&idev->lock); |
67ba4152 | 952 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
953 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
954 | if (--ma->mca_users == 0) { | |
955 | *map = ma->next; | |
956 | write_unlock_bh(&idev->lock); | |
957 | ||
958 | igmp6_group_dropped(ma); | |
1666d49e | 959 | ip6_mc_clear_src(ma); |
1da177e4 LT |
960 | |
961 | ma_put(ma); | |
962 | return 0; | |
963 | } | |
964 | write_unlock_bh(&idev->lock); | |
965 | return 0; | |
966 | } | |
967 | } | |
968 | write_unlock_bh(&idev->lock); | |
969 | ||
970 | return -ENOENT; | |
971 | } | |
972 | ||
9acd9f3a | 973 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 974 | { |
96b52e61 | 975 | struct inet6_dev *idev; |
1da177e4 LT |
976 | int err; |
977 | ||
414b6c94 | 978 | ASSERT_RTNL(); |
1da177e4 | 979 | |
96b52e61 ED |
980 | idev = __in6_dev_get(dev); |
981 | if (!idev) | |
982 | err = -ENODEV; | |
983 | else | |
984 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
985 | |
986 | return err; | |
987 | } | |
4effd28c | 988 | EXPORT_SYMBOL(ipv6_dev_mc_dec); |
1da177e4 | 989 | |
1da177e4 LT |
990 | /* |
991 | * check if the interface/address pair is valid | |
992 | */ | |
a50feda5 ED |
993 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
994 | const struct in6_addr *src_addr) | |
1da177e4 LT |
995 | { |
996 | struct inet6_dev *idev; | |
997 | struct ifmcaddr6 *mc; | |
a50feda5 | 998 | bool rv = false; |
1da177e4 | 999 | |
96b52e61 ED |
1000 | rcu_read_lock(); |
1001 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
1002 | if (idev) { |
1003 | read_lock_bh(&idev->lock); | |
67ba4152 | 1004 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
1005 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
1006 | break; | |
1007 | } | |
1008 | if (mc) { | |
1009 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
1010 | struct ip6_sf_list *psf; | |
1011 | ||
1012 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 1013 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1014 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
1015 | break; | |
1016 | } | |
1017 | if (psf) | |
1018 | rv = psf->sf_count[MCAST_INCLUDE] || | |
1019 | psf->sf_count[MCAST_EXCLUDE] != | |
1020 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
1021 | else | |
67ba4152 | 1022 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
1023 | spin_unlock_bh(&mc->mca_lock); |
1024 | } else | |
a50feda5 | 1025 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
1026 | } |
1027 | read_unlock_bh(&idev->lock); | |
1da177e4 | 1028 | } |
96b52e61 | 1029 | rcu_read_unlock(); |
1da177e4 LT |
1030 | return rv; |
1031 | } | |
1032 | ||
1033 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1034 | { | |
63862b5b | 1035 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
1036 | |
1037 | idev->mc_gq_running = 1; | |
1038 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1039 | in6_dev_hold(idev); | |
1040 | } | |
1041 | ||
b4af8def DB |
1042 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
1043 | { | |
1044 | idev->mc_gq_running = 0; | |
1045 | if (del_timer(&idev->mc_gq_timer)) | |
1046 | __in6_dev_put(idev); | |
1047 | } | |
1048 | ||
c2cef4e8 | 1049 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1050 | { |
63862b5b | 1051 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1052 | |
1053 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1054 | in6_dev_hold(idev); | |
1055 | } | |
1056 | ||
b4af8def DB |
1057 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1058 | { | |
1059 | idev->mc_ifc_count = 0; | |
1060 | if (del_timer(&idev->mc_ifc_timer)) | |
1061 | __in6_dev_put(idev); | |
1062 | } | |
1063 | ||
c2cef4e8 | 1064 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1065 | { |
63862b5b | 1066 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1067 | |
1068 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1069 | in6_dev_hold(idev); | |
1070 | } | |
1071 | ||
b4af8def DB |
1072 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1073 | { | |
1074 | if (del_timer(&idev->mc_dad_timer)) | |
1075 | __in6_dev_put(idev); | |
1076 | } | |
1077 | ||
1da177e4 LT |
1078 | /* |
1079 | * IGMP handling (alias multicast ICMPv6 messages) | |
1080 | */ | |
1081 | ||
1082 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1083 | { | |
1084 | unsigned long delay = resptime; | |
1085 | ||
1086 | /* Do not start timer for these addresses */ | |
1087 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1088 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1089 | return; | |
1090 | ||
1091 | if (del_timer(&ma->mca_timer)) { | |
d3981bc6 | 1092 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
1093 | delay = ma->mca_timer.expires - jiffies; |
1094 | } | |
1095 | ||
cc7f7ab7 | 1096 | if (delay >= resptime) |
63862b5b | 1097 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1098 | |
1da177e4 LT |
1099 | ma->mca_timer.expires = jiffies + delay; |
1100 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
d3981bc6 | 1101 | refcount_inc(&ma->mca_refcnt); |
1da177e4 LT |
1102 | ma->mca_flags |= MAF_TIMER_RUNNING; |
1103 | } | |
1104 | ||
5ab4a6c8 | 1105 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1106 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1107 | const struct in6_addr *srcs) | |
1da177e4 LT |
1108 | { |
1109 | struct ip6_sf_list *psf; | |
1110 | int i, scount; | |
1111 | ||
1112 | scount = 0; | |
67ba4152 | 1113 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1114 | if (scount == nsrcs) |
1115 | break; | |
67ba4152 | 1116 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1117 | /* skip inactive filters */ |
e05c4ad3 | 1118 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1119 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1120 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1121 | break; |
5ab4a6c8 DS |
1122 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1123 | scount++; | |
1124 | break; | |
1125 | } | |
1126 | } | |
1127 | } | |
1128 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1129 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1130 | return false; |
1131 | return true; | |
5ab4a6c8 DS |
1132 | } |
1133 | ||
a50feda5 ED |
1134 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1135 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1136 | { |
1137 | struct ip6_sf_list *psf; | |
1138 | int i, scount; | |
1139 | ||
1140 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1141 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1142 | ||
1143 | /* mark INCLUDE-mode sources */ | |
1144 | ||
1145 | scount = 0; | |
67ba4152 | 1146 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1147 | if (scount == nsrcs) |
1148 | break; | |
67ba4152 | 1149 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1150 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1151 | psf->sf_gsresp = 1; | |
1152 | scount++; | |
1153 | break; | |
1154 | } | |
5ab4a6c8 DS |
1155 | } |
1156 | } | |
1157 | if (!scount) { | |
1158 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1159 | return false; |
1da177e4 | 1160 | } |
5ab4a6c8 | 1161 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1162 | return true; |
1da177e4 LT |
1163 | } |
1164 | ||
58c0ecfd DB |
1165 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1166 | { | |
1167 | /* Normally, both are 0 here. If enforcement to a particular is | |
1168 | * being used, individual device enforcement will have a lower | |
1169 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1170 | */ | |
1171 | ||
1172 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1173 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1174 | else | |
1175 | return idev->cnf.force_mld_version; | |
1176 | } | |
1177 | ||
1178 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1179 | { | |
1180 | return mld_force_mld_version(idev) == 2; | |
1181 | } | |
1182 | ||
1183 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1184 | { | |
1185 | return mld_force_mld_version(idev) == 1; | |
1186 | } | |
1187 | ||
6c567b78 DB |
1188 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1189 | { | |
58c0ecfd DB |
1190 | if (mld_in_v2_mode_only(idev)) |
1191 | return false; | |
1192 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1193 | return true; |
1194 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1195 | return true; | |
1196 | ||
1197 | return false; | |
1198 | } | |
1199 | ||
89225d1c DB |
1200 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1201 | { | |
1202 | /* RFC3810, relevant sections: | |
1203 | * - 9.1. Robustness Variable | |
1204 | * - 9.2. Query Interval | |
1205 | * - 9.3. Query Response Interval | |
1206 | * - 9.12. Older Version Querier Present Timeout | |
1207 | */ | |
1208 | unsigned long switchback; | |
1209 | ||
1210 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1211 | ||
1212 | idev->mc_v1_seen = jiffies + switchback; | |
1213 | } | |
1214 | ||
1215 | static void mld_update_qrv(struct inet6_dev *idev, | |
1216 | const struct mld2_query *mlh2) | |
1217 | { | |
1218 | /* RFC3810, relevant sections: | |
1219 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1220 | * - 9.1. Robustness Variable | |
1221 | */ | |
1222 | ||
1223 | /* The value of the Robustness Variable MUST NOT be zero, | |
1224 | * and SHOULD NOT be one. Catch this here if we ever run | |
1225 | * into such a case in future. | |
1226 | */ | |
2f711939 | 1227 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1228 | WARN_ON(idev->mc_qrv == 0); |
1229 | ||
1230 | if (mlh2->mld2q_qrv > 0) | |
1231 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1232 | ||
2f711939 | 1233 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1234 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1235 | idev->mc_qrv, min_qrv); |
1236 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1237 | } |
1238 | } | |
1239 | ||
1240 | static void mld_update_qi(struct inet6_dev *idev, | |
1241 | const struct mld2_query *mlh2) | |
1242 | { | |
1243 | /* RFC3810, relevant sections: | |
1244 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1245 | * - 9.2. Query Interval | |
1246 | * - 9.12. Older Version Querier Present Timeout | |
1247 | * (the [Query Interval] in the last Query received) | |
1248 | */ | |
1249 | unsigned long mc_qqi; | |
1250 | ||
1251 | if (mlh2->mld2q_qqic < 128) { | |
1252 | mc_qqi = mlh2->mld2q_qqic; | |
1253 | } else { | |
1254 | unsigned long mc_man, mc_exp; | |
1255 | ||
1256 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1257 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1258 | ||
1259 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1260 | } | |
1261 | ||
1262 | idev->mc_qi = mc_qqi * HZ; | |
1263 | } | |
1264 | ||
1265 | static void mld_update_qri(struct inet6_dev *idev, | |
1266 | const struct mld2_query *mlh2) | |
1267 | { | |
1268 | /* RFC3810, relevant sections: | |
1269 | * - 5.1.3. Maximum Response Code | |
1270 | * - 9.3. Query Response Interval | |
1271 | */ | |
e3f5b170 | 1272 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1273 | } |
1274 | ||
2b7c121f | 1275 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
35f7aa53 | 1276 | unsigned long *max_delay, bool v1_query) |
2b7c121f DB |
1277 | { |
1278 | unsigned long mldv1_md; | |
1279 | ||
1280 | /* Ignore v1 queries */ | |
1281 | if (mld_in_v2_mode_only(idev)) | |
1282 | return -EINVAL; | |
1283 | ||
2b7c121f | 1284 | mldv1_md = ntohs(mld->mld_maxdelay); |
35f7aa53 DB |
1285 | |
1286 | /* When in MLDv1 fallback and a MLDv2 router start-up being | |
1287 | * unaware of current MLDv1 operation, the MRC == MRD mapping | |
1288 | * only works when the exponential algorithm is not being | |
1289 | * used (as MLDv1 is unaware of such things). | |
1290 | * | |
1291 | * According to the RFC author, the MLDv2 implementations | |
1292 | * he's aware of all use a MRC < 32768 on start up queries. | |
1293 | * | |
1294 | * Thus, should we *ever* encounter something else larger | |
1295 | * than that, just assume the maximum possible within our | |
1296 | * reach. | |
1297 | */ | |
1298 | if (!v1_query) | |
1299 | mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT); | |
1300 | ||
2b7c121f DB |
1301 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); |
1302 | ||
35f7aa53 DB |
1303 | /* MLDv1 router present: we need to go into v1 mode *only* |
1304 | * when an MLDv1 query is received as per section 9.12. of | |
1305 | * RFC3810! And we know from RFC2710 section 3.7 that MLDv1 | |
1306 | * queries MUST be of exactly 24 octets. | |
1307 | */ | |
1308 | if (v1_query) | |
1309 | mld_set_v1_mode(idev); | |
2b7c121f DB |
1310 | |
1311 | /* cancel MLDv2 report timer */ | |
b4af8def | 1312 | mld_gq_stop_timer(idev); |
2b7c121f | 1313 | /* cancel the interface change timer */ |
b4af8def | 1314 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1315 | /* clear deleted report items */ |
1316 | mld_clear_delrec(idev); | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1322 | unsigned long *max_delay) | |
1323 | { | |
2b7c121f DB |
1324 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); |
1325 | ||
1326 | mld_update_qrv(idev, mld); | |
1327 | mld_update_qi(idev, mld); | |
1328 | mld_update_qri(idev, mld); | |
1329 | ||
1330 | idev->mc_maxdelay = *max_delay; | |
1331 | ||
1332 | return 0; | |
1333 | } | |
1334 | ||
96b52e61 | 1335 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1336 | int igmp6_event_query(struct sk_buff *skb) |
1337 | { | |
97300b5f | 1338 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1339 | struct ifmcaddr6 *ma; |
b71d1d42 | 1340 | const struct in6_addr *group; |
1da177e4 LT |
1341 | unsigned long max_delay; |
1342 | struct inet6_dev *idev; | |
6e7cb837 | 1343 | struct mld_msg *mld; |
1da177e4 LT |
1344 | int group_type; |
1345 | int mark = 0; | |
2b7c121f | 1346 | int len, err; |
1da177e4 LT |
1347 | |
1348 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1349 | return -EINVAL; | |
1350 | ||
1351 | /* compute payload length excluding extension headers */ | |
0660e03f | 1352 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1353 | len -= skb_network_header_len(skb); |
1da177e4 | 1354 | |
e940f5d6 HL |
1355 | /* RFC3810 6.2 |
1356 | * Upon reception of an MLD message that contains a Query, the node | |
1357 | * checks if the source address of the message is a valid link-local | |
1358 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1359 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1360 | * packet. If any of these checks fails, the packet is dropped. | |
1361 | */ | |
1362 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1363 | ipv6_hdr(skb)->hop_limit != 1 || | |
1364 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1365 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1366 | return -EINVAL; |
1367 | ||
96b52e61 | 1368 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1369 | if (!idev) |
1da177e4 LT |
1370 | return 0; |
1371 | ||
6e7cb837 YH |
1372 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1373 | group = &mld->mld_mca; | |
1da177e4 LT |
1374 | group_type = ipv6_addr_type(group); |
1375 | ||
1376 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1377 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1378 | return -EINVAL; |
1da177e4 | 1379 | |
35f7aa53 DB |
1380 | if (len < MLD_V1_QUERY_LEN) { |
1381 | return -EINVAL; | |
1382 | } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) { | |
1383 | err = mld_process_v1(idev, mld, &max_delay, | |
1384 | len == MLD_V1_QUERY_LEN); | |
2b7c121f DB |
1385 | if (err < 0) |
1386 | return err; | |
9fd07841 | 1387 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1388 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1389 | sizeof(struct icmp6hdr); |
89225d1c | 1390 | |
96b52e61 | 1391 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1392 | return -EINVAL; |
96b52e61 | 1393 | |
9c70220b | 1394 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1395 | |
2b7c121f DB |
1396 | err = mld_process_v2(idev, mlh2, &max_delay); |
1397 | if (err < 0) | |
1398 | return err; | |
89225d1c | 1399 | |
1da177e4 | 1400 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1401 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1402 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1403 | |
1da177e4 | 1404 | mld_gq_start_timer(idev); |
1da177e4 LT |
1405 | return 0; |
1406 | } | |
1407 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1408 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1409 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1410 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1411 | return -EINVAL; |
96b52e61 | 1412 | |
9c70220b | 1413 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1414 | mark = 1; |
1415 | } | |
35f7aa53 | 1416 | } else { |
1da177e4 | 1417 | return -EINVAL; |
35f7aa53 | 1418 | } |
1da177e4 LT |
1419 | |
1420 | read_lock_bh(&idev->lock); | |
1421 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1422 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1423 | spin_lock_bh(&ma->mca_lock); |
1424 | igmp6_group_queried(ma, max_delay); | |
1425 | spin_unlock_bh(&ma->mca_lock); | |
1426 | } | |
1427 | } else { | |
67ba4152 | 1428 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1429 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1430 | continue; |
1431 | spin_lock_bh(&ma->mca_lock); | |
1432 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1433 | /* gsquery <- gsquery && mark */ | |
1434 | if (!mark) | |
1435 | ma->mca_flags &= ~MAF_GSQUERY; | |
1436 | } else { | |
1437 | /* gsquery <- mark */ | |
1438 | if (mark) | |
1439 | ma->mca_flags |= MAF_GSQUERY; | |
1440 | else | |
1441 | ma->mca_flags &= ~MAF_GSQUERY; | |
1442 | } | |
5ab4a6c8 | 1443 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1444 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1445 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1446 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1447 | break; |
1da177e4 LT |
1448 | } |
1449 | } | |
1450 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1451 | |
1452 | return 0; | |
1453 | } | |
1454 | ||
96b52e61 | 1455 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1456 | int igmp6_event_report(struct sk_buff *skb) |
1457 | { | |
1458 | struct ifmcaddr6 *ma; | |
1da177e4 | 1459 | struct inet6_dev *idev; |
6e7cb837 | 1460 | struct mld_msg *mld; |
1da177e4 LT |
1461 | int addr_type; |
1462 | ||
1463 | /* Our own report looped back. Ignore it. */ | |
1464 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1465 | return 0; | |
1466 | ||
24c69275 DS |
1467 | /* send our report if the MC router may not have heard this report */ |
1468 | if (skb->pkt_type != PACKET_MULTICAST && | |
1469 | skb->pkt_type != PACKET_BROADCAST) | |
1470 | return 0; | |
1471 | ||
6e7cb837 | 1472 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1473 | return -EINVAL; |
1474 | ||
6e7cb837 | 1475 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1476 | |
1477 | /* Drop reports with not link local source */ | |
0660e03f | 1478 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1479 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1480 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1481 | return -EINVAL; | |
1482 | ||
96b52e61 | 1483 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1484 | if (!idev) |
1da177e4 LT |
1485 | return -ENODEV; |
1486 | ||
1487 | /* | |
1488 | * Cancel the timer for this group | |
1489 | */ | |
1490 | ||
1491 | read_lock_bh(&idev->lock); | |
67ba4152 | 1492 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1493 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1494 | spin_lock(&ma->mca_lock); |
1495 | if (del_timer(&ma->mca_timer)) | |
d3981bc6 | 1496 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
1497 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); |
1498 | spin_unlock(&ma->mca_lock); | |
1499 | break; | |
1500 | } | |
1501 | } | |
1502 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1503 | return 0; |
1504 | } | |
1505 | ||
a50feda5 ED |
1506 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1507 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1508 | { |
1509 | switch (type) { | |
1510 | case MLD2_MODE_IS_INCLUDE: | |
1511 | case MLD2_MODE_IS_EXCLUDE: | |
1512 | if (gdeleted || sdeleted) | |
a50feda5 | 1513 | return false; |
5ab4a6c8 DS |
1514 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1515 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1516 | return true; |
5ab4a6c8 DS |
1517 | /* don't include if this source is excluded |
1518 | * in all filters | |
1519 | */ | |
1520 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1521 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1522 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1523 | psf->sf_count[MCAST_EXCLUDE]; | |
1524 | } | |
a50feda5 | 1525 | return false; |
1da177e4 LT |
1526 | case MLD2_CHANGE_TO_INCLUDE: |
1527 | if (gdeleted || sdeleted) | |
a50feda5 | 1528 | return false; |
1da177e4 LT |
1529 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1530 | case MLD2_CHANGE_TO_EXCLUDE: | |
1531 | if (gdeleted || sdeleted) | |
a50feda5 | 1532 | return false; |
1da177e4 LT |
1533 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1534 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1535 | return false; |
1da177e4 LT |
1536 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1537 | psf->sf_count[MCAST_EXCLUDE]; | |
1538 | case MLD2_ALLOW_NEW_SOURCES: | |
1539 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1540 | return false; |
1da177e4 LT |
1541 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1542 | case MLD2_BLOCK_OLD_SOURCES: | |
1543 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1544 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1545 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1546 | } | |
a50feda5 | 1547 | return false; |
1da177e4 LT |
1548 | } |
1549 | ||
1550 | static int | |
1551 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1552 | { | |
1553 | struct ip6_sf_list *psf; | |
1554 | int scount = 0; | |
1555 | ||
67ba4152 | 1556 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1557 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1558 | continue; | |
1559 | scount++; | |
1560 | } | |
1561 | return scount; | |
1562 | } | |
1563 | ||
2576f17d YH |
1564 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1565 | struct net_device *dev, | |
1566 | const struct in6_addr *saddr, | |
1567 | const struct in6_addr *daddr, | |
1568 | int proto, int len) | |
1569 | { | |
1570 | struct ipv6hdr *hdr; | |
1571 | ||
1572 | skb->protocol = htons(ETH_P_IPV6); | |
1573 | skb->dev = dev; | |
1574 | ||
1575 | skb_reset_network_header(skb); | |
1576 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1577 | hdr = ipv6_hdr(skb); | |
1578 | ||
1579 | ip6_flow_hdr(hdr, 0, 0); | |
1580 | ||
1581 | hdr->payload_len = htons(len); | |
1582 | hdr->nexthdr = proto; | |
1583 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1584 | ||
1585 | hdr->saddr = *saddr; | |
1586 | hdr->daddr = *daddr; | |
1587 | } | |
1588 | ||
4c672e4b | 1589 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu) |
1da177e4 | 1590 | { |
8965779d | 1591 | struct net_device *dev = idev->dev; |
c346dca1 | 1592 | struct net *net = dev_net(dev); |
b8ad0cbc | 1593 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1594 | struct sk_buff *skb; |
1595 | struct mld2_report *pmr; | |
1596 | struct in6_addr addr_buf; | |
d7aabf22 | 1597 | const struct in6_addr *saddr; |
a7ae1992 HX |
1598 | int hlen = LL_RESERVED_SPACE(dev); |
1599 | int tlen = dev->needed_tailroom; | |
4c672e4b | 1600 | unsigned int size = mtu + hlen + tlen; |
1da177e4 LT |
1601 | int err; |
1602 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1603 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1604 | IPV6_TLV_PADN, 0 }; | |
1605 | ||
1606 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1607 | /* limit our allocations to order-0 page */ |
1608 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1609 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1610 | |
cfcabdcc | 1611 | if (!skb) |
1da177e4 LT |
1612 | return NULL; |
1613 | ||
9d4a0314 | 1614 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1615 | skb_reserve(skb, hlen); |
1837b2e2 | 1616 | skb_tailroom_reserve(skb, mtu, tlen); |
1da177e4 | 1617 | |
8965779d | 1618 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1619 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1620 | * use unspecified address as the source address |
1da177e4 LT |
1621 | * when a valid link-local address is not available. |
1622 | */ | |
d7aabf22 YH |
1623 | saddr = &in6addr_any; |
1624 | } else | |
1625 | saddr = &addr_buf; | |
1da177e4 | 1626 | |
2576f17d | 1627 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 | 1628 | |
59ae1d12 | 1629 | skb_put_data(skb, ra, sizeof(ra)); |
1da177e4 | 1630 | |
27a884dc | 1631 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1632 | skb_put(skb, sizeof(*pmr)); |
1633 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1634 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1635 | pmr->mld2r_resv1 = 0; | |
1636 | pmr->mld2r_cksum = 0; | |
1637 | pmr->mld2r_resv2 = 0; | |
1638 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1639 | return skb; |
1640 | } | |
1641 | ||
1642 | static void mld_sendpack(struct sk_buff *skb) | |
1643 | { | |
0660e03f | 1644 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1645 | struct mld2_report *pmr = |
1646 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1647 | int payload_len, mldlen; |
96b52e61 | 1648 | struct inet6_dev *idev; |
c346dca1 | 1649 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1650 | int err; |
4c9483b2 | 1651 | struct flowi6 fl6; |
adf30907 | 1652 | struct dst_entry *dst; |
1da177e4 | 1653 | |
96b52e61 ED |
1654 | rcu_read_lock(); |
1655 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1656 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1657 | ||
29a3cad5 SH |
1658 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1659 | sizeof(*pip6); | |
1660 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1661 | pip6->payload_len = htons(payload_len); |
1662 | ||
6e7cb837 YH |
1663 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1664 | IPPROTO_ICMPV6, | |
1665 | csum_partial(skb_transport_header(skb), | |
1666 | mldlen, 0)); | |
41927178 | 1667 | |
4c9483b2 | 1668 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1669 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1670 | skb->dev->ifindex); | |
12fd84f4 | 1671 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1672 | |
452edd59 DM |
1673 | err = 0; |
1674 | if (IS_ERR(dst)) { | |
1675 | err = PTR_ERR(dst); | |
1676 | dst = NULL; | |
1677 | } | |
adf30907 | 1678 | skb_dst_set(skb, dst); |
41927178 YH |
1679 | if (err) |
1680 | goto err_out; | |
1681 | ||
7026b1dd | 1682 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
29a26a56 | 1683 | net, net->ipv6.igmp_sk, skb, NULL, skb->dev, |
13206b6b | 1684 | dst_output); |
41927178 | 1685 | out: |
1da177e4 | 1686 | if (!err) { |
43a43b60 HFS |
1687 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1688 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
43a43b60 HFS |
1689 | } else { |
1690 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1691 | } | |
1da177e4 | 1692 | |
96b52e61 | 1693 | rcu_read_unlock(); |
41927178 YH |
1694 | return; |
1695 | ||
1696 | err_out: | |
1697 | kfree_skb(skb); | |
1698 | goto out; | |
1da177e4 LT |
1699 | } |
1700 | ||
1701 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1702 | { | |
fab10fe3 | 1703 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1704 | } |
1705 | ||
1706 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
b9b312a7 | 1707 | int type, struct mld2_grec **ppgr, unsigned int mtu) |
1da177e4 | 1708 | { |
1da177e4 LT |
1709 | struct mld2_report *pmr; |
1710 | struct mld2_grec *pgr; | |
1711 | ||
b9b312a7 ED |
1712 | if (!skb) { |
1713 | skb = mld_newpack(pmc->idev, mtu); | |
1714 | if (!skb) | |
1715 | return NULL; | |
1716 | } | |
4df864c1 | 1717 | pgr = skb_put(skb, sizeof(struct mld2_grec)); |
1da177e4 LT |
1718 | pgr->grec_type = type; |
1719 | pgr->grec_auxwords = 0; | |
1720 | pgr->grec_nsrcs = 0; | |
1721 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1722 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1723 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1724 | *ppgr = pgr; |
1725 | return skb; | |
1726 | } | |
1727 | ||
4c672e4b | 1728 | #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0) |
1da177e4 LT |
1729 | |
1730 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1731 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1732 | { |
8965779d AW |
1733 | struct inet6_dev *idev = pmc->idev; |
1734 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1735 | struct mld2_report *pmr; |
1736 | struct mld2_grec *pgr = NULL; | |
1737 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1738 | int scount, stotal, first, isquery, truncate; |
b9b312a7 | 1739 | unsigned int mtu; |
1da177e4 LT |
1740 | |
1741 | if (pmc->mca_flags & MAF_NOREPORT) | |
1742 | return skb; | |
1743 | ||
b9b312a7 ED |
1744 | mtu = READ_ONCE(dev->mtu); |
1745 | if (mtu < IPV6_MIN_MTU) | |
1746 | return skb; | |
1747 | ||
1da177e4 LT |
1748 | isquery = type == MLD2_MODE_IS_INCLUDE || |
1749 | type == MLD2_MODE_IS_EXCLUDE; | |
1750 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1751 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1752 | ||
5ab4a6c8 DS |
1753 | stotal = scount = 0; |
1754 | ||
1da177e4 LT |
1755 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1756 | ||
5ab4a6c8 DS |
1757 | if (!*psf_list) |
1758 | goto empty_source; | |
1759 | ||
9c70220b | 1760 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1761 | |
1762 | /* EX and TO_EX get a fresh packet, if needed */ | |
1763 | if (truncate) { | |
6e7cb837 | 1764 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1765 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1766 | if (skb) | |
1767 | mld_sendpack(skb); | |
b9b312a7 | 1768 | skb = mld_newpack(idev, mtu); |
1da177e4 LT |
1769 | } |
1770 | } | |
1771 | first = 1; | |
1da177e4 | 1772 | psf_prev = NULL; |
67ba4152 | 1773 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1774 | struct in6_addr *psrc; |
1775 | ||
1776 | psf_next = psf->sf_next; | |
1777 | ||
c7ea20c9 | 1778 | if (!is_in(pmc, psf, type, gdeleted, sdeleted) && !crsend) { |
1da177e4 LT |
1779 | psf_prev = psf; |
1780 | continue; | |
1781 | } | |
1782 | ||
a052517a HL |
1783 | /* Based on RFC3810 6.1. Should not send source-list change |
1784 | * records when there is a filter mode change. | |
1785 | */ | |
1786 | if (((gdeleted && pmc->mca_sfmode == MCAST_EXCLUDE) || | |
1787 | (!gdeleted && pmc->mca_crcount)) && | |
1788 | (type == MLD2_ALLOW_NEW_SOURCES || | |
1789 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) | |
1790 | goto decrease_sf_crcount; | |
1791 | ||
1da177e4 LT |
1792 | /* clear marks on query responses */ |
1793 | if (isquery) | |
1794 | psf->sf_gsresp = 0; | |
1795 | ||
1796 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1797 | first*sizeof(struct mld2_grec)) { | |
1798 | if (truncate && !first) | |
1799 | break; /* truncate these */ | |
1800 | if (pgr) | |
1801 | pgr->grec_nsrcs = htons(scount); | |
1802 | if (skb) | |
1803 | mld_sendpack(skb); | |
b9b312a7 | 1804 | skb = mld_newpack(idev, mtu); |
1da177e4 LT |
1805 | first = 1; |
1806 | scount = 0; | |
1807 | } | |
1808 | if (first) { | |
b9b312a7 | 1809 | skb = add_grhead(skb, pmc, type, &pgr, mtu); |
1da177e4 LT |
1810 | first = 0; |
1811 | } | |
cc63f70b AD |
1812 | if (!skb) |
1813 | return NULL; | |
4df864c1 | 1814 | psrc = skb_put(skb, sizeof(*psrc)); |
1da177e4 | 1815 | *psrc = psf->sf_addr; |
5ab4a6c8 | 1816 | scount++; stotal++; |
1da177e4 LT |
1817 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1818 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
a052517a | 1819 | decrease_sf_crcount: |
1da177e4 LT |
1820 | psf->sf_crcount--; |
1821 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1822 | if (psf_prev) | |
1823 | psf_prev->sf_next = psf->sf_next; | |
1824 | else | |
1825 | *psf_list = psf->sf_next; | |
1826 | kfree(psf); | |
1827 | continue; | |
1828 | } | |
1829 | } | |
1830 | psf_prev = psf; | |
1831 | } | |
5ab4a6c8 DS |
1832 | |
1833 | empty_source: | |
1834 | if (!stotal) { | |
1835 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1836 | type == MLD2_BLOCK_OLD_SOURCES) | |
1837 | return skb; | |
6a7cc418 | 1838 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1839 | /* make sure we have room for group header */ |
1840 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1841 | mld_sendpack(skb); | |
1842 | skb = NULL; /* add_grhead will get a new one */ | |
1843 | } | |
b9b312a7 | 1844 | skb = add_grhead(skb, pmc, type, &pgr, mtu); |
5ab4a6c8 DS |
1845 | } |
1846 | } | |
1da177e4 LT |
1847 | if (pgr) |
1848 | pgr->grec_nsrcs = htons(scount); | |
1849 | ||
1850 | if (isquery) | |
1851 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1852 | return skb; | |
1853 | } | |
1854 | ||
1855 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1856 | { | |
1857 | struct sk_buff *skb = NULL; | |
1858 | int type; | |
1859 | ||
8965779d | 1860 | read_lock_bh(&idev->lock); |
1da177e4 | 1861 | if (!pmc) { |
67ba4152 | 1862 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1863 | if (pmc->mca_flags & MAF_NOREPORT) |
1864 | continue; | |
1865 | spin_lock_bh(&pmc->mca_lock); | |
1866 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1867 | type = MLD2_MODE_IS_EXCLUDE; | |
1868 | else | |
1869 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1870 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1871 | spin_unlock_bh(&pmc->mca_lock); |
1872 | } | |
1da177e4 LT |
1873 | } else { |
1874 | spin_lock_bh(&pmc->mca_lock); | |
1875 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1876 | type = MLD2_MODE_IS_EXCLUDE; | |
1877 | else | |
1878 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1879 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1880 | spin_unlock_bh(&pmc->mca_lock); |
1881 | } | |
8965779d | 1882 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1883 | if (skb) |
1884 | mld_sendpack(skb); | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * remove zero-count source records from a source filter list | |
1889 | */ | |
1890 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1891 | { | |
1892 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1893 | ||
1894 | psf_prev = NULL; | |
67ba4152 | 1895 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1896 | psf_next = psf->sf_next; |
1897 | if (psf->sf_crcount == 0) { | |
1898 | if (psf_prev) | |
1899 | psf_prev->sf_next = psf->sf_next; | |
1900 | else | |
1901 | *ppsf = psf->sf_next; | |
1902 | kfree(psf); | |
1903 | } else | |
1904 | psf_prev = psf; | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | static void mld_send_cr(struct inet6_dev *idev) | |
1909 | { | |
1910 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1911 | struct sk_buff *skb = NULL; | |
1912 | int type, dtype; | |
1913 | ||
1914 | read_lock_bh(&idev->lock); | |
6457d26b | 1915 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1916 | |
1917 | /* deleted MCA's */ | |
1918 | pmc_prev = NULL; | |
67ba4152 | 1919 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1920 | pmc_next = pmc->next; |
1921 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1922 | type = MLD2_BLOCK_OLD_SOURCES; | |
1923 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1924 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1925 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1926 | } |
1927 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1928 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1929 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1930 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1931 | } |
5ab4a6c8 | 1932 | pmc->mca_crcount--; |
1da177e4 LT |
1933 | if (pmc->mca_crcount == 0) { |
1934 | mld_clear_zeros(&pmc->mca_tomb); | |
1935 | mld_clear_zeros(&pmc->mca_sources); | |
1936 | } | |
1937 | } | |
1938 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1939 | !pmc->mca_sources) { | |
1940 | if (pmc_prev) | |
1941 | pmc_prev->next = pmc_next; | |
1942 | else | |
1943 | idev->mc_tomb = pmc_next; | |
1944 | in6_dev_put(pmc->idev); | |
1945 | kfree(pmc); | |
1946 | } else | |
1947 | pmc_prev = pmc; | |
1948 | } | |
6457d26b | 1949 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1950 | |
1951 | /* change recs */ | |
67ba4152 | 1952 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1953 | spin_lock_bh(&pmc->mca_lock); |
1954 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1955 | type = MLD2_BLOCK_OLD_SOURCES; | |
1956 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1957 | } else { | |
1958 | type = MLD2_ALLOW_NEW_SOURCES; | |
1959 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1960 | } | |
6a7cc418 FL |
1961 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1962 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1963 | |
1964 | /* filter mode changes */ | |
1965 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1966 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1967 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1968 | else | |
1969 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1970 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1971 | pmc->mca_crcount--; |
1da177e4 LT |
1972 | } |
1973 | spin_unlock_bh(&pmc->mca_lock); | |
1974 | } | |
1975 | read_unlock_bh(&idev->lock); | |
1976 | if (!skb) | |
1977 | return; | |
1978 | (void) mld_sendpack(skb); | |
1979 | } | |
1980 | ||
1981 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1982 | { | |
c346dca1 | 1983 | struct net *net = dev_net(dev); |
b8ad0cbc | 1984 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1985 | struct inet6_dev *idev; |
1ab1457c | 1986 | struct sk_buff *skb; |
6e7cb837 | 1987 | struct mld_msg *hdr; |
d7aabf22 | 1988 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1989 | struct in6_addr addr_buf; |
a7ae1992 HX |
1990 | int hlen = LL_RESERVED_SPACE(dev); |
1991 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1992 | int err, len, payload_len, full_len; |
1993 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1994 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1995 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1996 | struct flowi6 fl6; |
adf30907 | 1997 | struct dst_entry *dst; |
1da177e4 | 1998 | |
f3ee4010 YH |
1999 | if (type == ICMPV6_MGM_REDUCTION) |
2000 | snd_addr = &in6addr_linklocal_allrouters; | |
2001 | else | |
2002 | snd_addr = addr; | |
1da177e4 LT |
2003 | |
2004 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
2005 | payload_len = len + sizeof(ra); | |
2006 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
2007 | ||
edf391ff NH |
2008 | rcu_read_lock(); |
2009 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
2010 | IPSTATS_MIB_OUT, full_len); | |
2011 | rcu_read_unlock(); | |
2012 | ||
a7ae1992 | 2013 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 | 2014 | |
63159f29 | 2015 | if (!skb) { |
a11d206d | 2016 | rcu_read_lock(); |
3bd653c8 | 2017 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
2018 | IPSTATS_MIB_OUTDISCARDS); |
2019 | rcu_read_unlock(); | |
1da177e4 LT |
2020 | return; |
2021 | } | |
9d4a0314 | 2022 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 2023 | skb_reserve(skb, hlen); |
1da177e4 | 2024 | |
95c385b4 | 2025 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 2026 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 2027 | * use unspecified address as the source address |
1da177e4 LT |
2028 | * when a valid link-local address is not available. |
2029 | */ | |
d7aabf22 YH |
2030 | saddr = &in6addr_any; |
2031 | } else | |
2032 | saddr = &addr_buf; | |
1da177e4 | 2033 | |
2576f17d | 2034 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 | 2035 | |
59ae1d12 | 2036 | skb_put_data(skb, ra, sizeof(ra)); |
1da177e4 | 2037 | |
b080db58 | 2038 | hdr = skb_put_zero(skb, sizeof(struct mld_msg)); |
6e7cb837 | 2039 | hdr->mld_type = type; |
4e3fd7a0 | 2040 | hdr->mld_mca = *addr; |
1da177e4 | 2041 | |
6e7cb837 YH |
2042 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
2043 | IPPROTO_ICMPV6, | |
2044 | csum_partial(hdr, len, 0)); | |
1da177e4 | 2045 | |
96b52e61 ED |
2046 | rcu_read_lock(); |
2047 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 2048 | |
4c9483b2 | 2049 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
2050 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
2051 | skb->dev->ifindex); | |
12fd84f4 | 2052 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
2053 | if (IS_ERR(dst)) { |
2054 | err = PTR_ERR(dst); | |
41927178 | 2055 | goto err_out; |
452edd59 | 2056 | } |
41927178 | 2057 | |
adf30907 | 2058 | skb_dst_set(skb, dst); |
29a26a56 EB |
2059 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
2060 | net, sk, skb, NULL, skb->dev, | |
13206b6b | 2061 | dst_output); |
41927178 | 2062 | out: |
1da177e4 | 2063 | if (!err) { |
5c5d244b | 2064 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 2065 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
1da177e4 | 2066 | } else |
3bd653c8 | 2067 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 2068 | |
96b52e61 | 2069 | rcu_read_unlock(); |
1da177e4 | 2070 | return; |
41927178 YH |
2071 | |
2072 | err_out: | |
2073 | kfree_skb(skb); | |
2074 | goto out; | |
1da177e4 LT |
2075 | } |
2076 | ||
6a7cc418 | 2077 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 2078 | { |
6a7cc418 FL |
2079 | struct sk_buff *skb; |
2080 | struct ifmcaddr6 *pmc; | |
2081 | int type; | |
2082 | ||
2083 | if (mld_in_v1_mode(idev)) | |
2084 | return; | |
2085 | ||
2086 | skb = NULL; | |
2087 | read_lock_bh(&idev->lock); | |
67ba4152 | 2088 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2089 | spin_lock_bh(&pmc->mca_lock); |
2090 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2091 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2092 | else | |
c7ea20c9 | 2093 | type = MLD2_ALLOW_NEW_SOURCES; |
6a7cc418 FL |
2094 | skb = add_grec(skb, pmc, type, 0, 0, 1); |
2095 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2096 | } |
6a7cc418 FL |
2097 | read_unlock_bh(&idev->lock); |
2098 | if (skb) | |
2099 | mld_sendpack(skb); | |
b173ee48 HFS |
2100 | } |
2101 | ||
2102 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2103 | { | |
2104 | idev->mc_dad_count = idev->mc_qrv; | |
2105 | if (idev->mc_dad_count) { | |
6a7cc418 | 2106 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2107 | idev->mc_dad_count--; |
2108 | if (idev->mc_dad_count) | |
6c6da928 HL |
2109 | mld_dad_start_timer(idev, |
2110 | unsolicited_report_interval(idev)); | |
b173ee48 HFS |
2111 | } |
2112 | } | |
2113 | ||
e99e88a9 | 2114 | static void mld_dad_timer_expire(struct timer_list *t) |
b173ee48 | 2115 | { |
e99e88a9 | 2116 | struct inet6_dev *idev = from_timer(idev, t, mc_dad_timer); |
b173ee48 | 2117 | |
6a7cc418 | 2118 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2119 | if (idev->mc_dad_count) { |
2120 | idev->mc_dad_count--; | |
2121 | if (idev->mc_dad_count) | |
6c6da928 HL |
2122 | mld_dad_start_timer(idev, |
2123 | unsolicited_report_interval(idev)); | |
b173ee48 | 2124 | } |
9260d3e1 | 2125 | in6_dev_put(idev); |
b173ee48 HFS |
2126 | } |
2127 | ||
1da177e4 | 2128 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2129 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2130 | { |
2131 | struct ip6_sf_list *psf, *psf_prev; | |
2132 | int rv = 0; | |
2133 | ||
2134 | psf_prev = NULL; | |
67ba4152 | 2135 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2136 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2137 | break; | |
2138 | psf_prev = psf; | |
2139 | } | |
2140 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2141 | /* source filter not found, or count wrong => bug */ | |
2142 | return -ESRCH; | |
2143 | } | |
2144 | psf->sf_count[sfmode]--; | |
2145 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2146 | struct inet6_dev *idev = pmc->idev; | |
2147 | ||
2148 | /* no more filters for this source */ | |
2149 | if (psf_prev) | |
2150 | psf_prev->sf_next = psf->sf_next; | |
2151 | else | |
2152 | pmc->mca_sources = psf->sf_next; | |
2153 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2154 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2155 | psf->sf_crcount = idev->mc_qrv; |
2156 | psf->sf_next = pmc->mca_tomb; | |
2157 | pmc->mca_tomb = psf; | |
2158 | rv = 1; | |
2159 | } else | |
2160 | kfree(psf); | |
2161 | } | |
2162 | return rv; | |
2163 | } | |
2164 | ||
b71d1d42 ED |
2165 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2166 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2167 | int delta) |
2168 | { | |
2169 | struct ifmcaddr6 *pmc; | |
2170 | int changerec = 0; | |
2171 | int i, err; | |
2172 | ||
2173 | if (!idev) | |
2174 | return -ENODEV; | |
2175 | read_lock_bh(&idev->lock); | |
67ba4152 | 2176 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2177 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2178 | break; | |
2179 | } | |
2180 | if (!pmc) { | |
2181 | /* MCA not found?? bug */ | |
2182 | read_unlock_bh(&idev->lock); | |
2183 | return -ESRCH; | |
2184 | } | |
2185 | spin_lock_bh(&pmc->mca_lock); | |
2186 | sf_markstate(pmc); | |
2187 | if (!delta) { | |
2188 | if (!pmc->mca_sfcount[sfmode]) { | |
2189 | spin_unlock_bh(&pmc->mca_lock); | |
2190 | read_unlock_bh(&idev->lock); | |
2191 | return -EINVAL; | |
2192 | } | |
2193 | pmc->mca_sfcount[sfmode]--; | |
2194 | } | |
2195 | err = 0; | |
67ba4152 | 2196 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2197 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2198 | ||
2199 | changerec |= rv > 0; | |
2200 | if (!err && rv < 0) | |
2201 | err = rv; | |
2202 | } | |
2203 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2204 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2205 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2206 | struct ip6_sf_list *psf; | |
2207 | ||
2208 | /* filter mode change */ | |
2209 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2210 | pmc->mca_crcount = idev->mc_qrv; | |
2211 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2212 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2213 | psf->sf_crcount = 0; |
2214 | mld_ifc_event(pmc->idev); | |
2215 | } else if (sf_setstate(pmc) || changerec) | |
2216 | mld_ifc_event(pmc->idev); | |
2217 | spin_unlock_bh(&pmc->mca_lock); | |
2218 | read_unlock_bh(&idev->lock); | |
2219 | return err; | |
2220 | } | |
2221 | ||
2222 | /* | |
2223 | * Add multicast single-source filter to the interface list | |
2224 | */ | |
2225 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2226 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2227 | { |
2228 | struct ip6_sf_list *psf, *psf_prev; | |
2229 | ||
2230 | psf_prev = NULL; | |
67ba4152 | 2231 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2232 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2233 | break; | |
2234 | psf_prev = psf; | |
2235 | } | |
2236 | if (!psf) { | |
0c600eda | 2237 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2238 | if (!psf) |
2239 | return -ENOBUFS; | |
0c600eda | 2240 | |
1da177e4 LT |
2241 | psf->sf_addr = *psfsrc; |
2242 | if (psf_prev) { | |
2243 | psf_prev->sf_next = psf; | |
2244 | } else | |
2245 | pmc->mca_sources = psf; | |
2246 | } | |
2247 | psf->sf_count[sfmode]++; | |
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2252 | { | |
2253 | struct ip6_sf_list *psf; | |
2254 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2255 | ||
67ba4152 | 2256 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2257 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2258 | psf->sf_oldin = mca_xcount == | |
2259 | psf->sf_count[MCAST_EXCLUDE] && | |
2260 | !psf->sf_count[MCAST_INCLUDE]; | |
2261 | } else | |
2262 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2263 | } | |
2264 | ||
2265 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2266 | { | |
7add2a43 | 2267 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2268 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2269 | int qrv = pmc->idev->mc_qrv; | |
2270 | int new_in, rv; | |
2271 | ||
2272 | rv = 0; | |
67ba4152 | 2273 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2274 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2275 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2276 | !psf->sf_count[MCAST_INCLUDE]; | |
2277 | } else | |
2278 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2279 | if (new_in) { |
2280 | if (!psf->sf_oldin) { | |
e80e28b6 | 2281 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2282 | |
67ba4152 IM |
2283 | for (dpsf = pmc->mca_tomb; dpsf; |
2284 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2285 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2286 | &psf->sf_addr)) | |
2287 | break; | |
2288 | prev = dpsf; | |
2289 | } | |
2290 | if (dpsf) { | |
2291 | if (prev) | |
2292 | prev->sf_next = dpsf->sf_next; | |
2293 | else | |
2294 | pmc->mca_tomb = dpsf->sf_next; | |
2295 | kfree(dpsf); | |
2296 | } | |
2297 | psf->sf_crcount = qrv; | |
2298 | rv++; | |
2299 | } | |
2300 | } else if (psf->sf_oldin) { | |
2301 | psf->sf_crcount = 0; | |
2302 | /* | |
2303 | * add or update "delete" records if an active filter | |
2304 | * is now inactive | |
2305 | */ | |
67ba4152 | 2306 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2307 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2308 | &psf->sf_addr)) | |
2309 | break; | |
2310 | if (!dpsf) { | |
5d55354f | 2311 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2312 | if (!dpsf) |
2313 | continue; | |
2314 | *dpsf = *psf; | |
2315 | /* pmc->mca_lock held by callers */ | |
2316 | dpsf->sf_next = pmc->mca_tomb; | |
2317 | pmc->mca_tomb = dpsf; | |
2318 | } | |
2319 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2320 | rv++; |
2321 | } | |
2322 | } | |
2323 | return rv; | |
2324 | } | |
2325 | ||
2326 | /* | |
2327 | * Add multicast source filter list to the interface list | |
2328 | */ | |
b71d1d42 ED |
2329 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2330 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2331 | int delta) |
2332 | { | |
2333 | struct ifmcaddr6 *pmc; | |
2334 | int isexclude; | |
2335 | int i, err; | |
2336 | ||
2337 | if (!idev) | |
2338 | return -ENODEV; | |
2339 | read_lock_bh(&idev->lock); | |
67ba4152 | 2340 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2341 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2342 | break; | |
2343 | } | |
2344 | if (!pmc) { | |
2345 | /* MCA not found?? bug */ | |
2346 | read_unlock_bh(&idev->lock); | |
2347 | return -ESRCH; | |
2348 | } | |
2349 | spin_lock_bh(&pmc->mca_lock); | |
2350 | ||
2351 | sf_markstate(pmc); | |
2352 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2353 | if (!delta) | |
2354 | pmc->mca_sfcount[sfmode]++; | |
2355 | err = 0; | |
67ba4152 | 2356 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2357 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2358 | if (err) |
2359 | break; | |
2360 | } | |
2361 | if (err) { | |
2362 | int j; | |
2363 | ||
2364 | if (!delta) | |
2365 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2366 | for (j = 0; j < i; j++) |
78d50217 | 2367 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2368 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2369 | struct ip6_sf_list *psf; |
2370 | ||
2371 | /* filter mode change */ | |
2372 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2373 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2374 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2375 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2376 | /* else no filters; keep old mode for reports */ | |
2377 | ||
2378 | pmc->mca_crcount = idev->mc_qrv; | |
2379 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2380 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2381 | psf->sf_crcount = 0; |
2382 | mld_ifc_event(idev); | |
2383 | } else if (sf_setstate(pmc)) | |
2384 | mld_ifc_event(idev); | |
2385 | spin_unlock_bh(&pmc->mca_lock); | |
2386 | read_unlock_bh(&idev->lock); | |
2387 | return err; | |
2388 | } | |
2389 | ||
2390 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2391 | { | |
2392 | struct ip6_sf_list *psf, *nextpsf; | |
2393 | ||
67ba4152 | 2394 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2395 | nextpsf = psf->sf_next; |
2396 | kfree(psf); | |
2397 | } | |
2398 | pmc->mca_tomb = NULL; | |
67ba4152 | 2399 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2400 | nextpsf = psf->sf_next; |
2401 | kfree(psf); | |
2402 | } | |
2403 | pmc->mca_sources = NULL; | |
2404 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2405 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2406 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2407 | } | |
2408 | ||
2409 | ||
2410 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2411 | { | |
2412 | unsigned long delay; | |
2413 | ||
2414 | if (ma->mca_flags & MAF_NOREPORT) | |
2415 | return; | |
2416 | ||
2417 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2418 | ||
63862b5b | 2419 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2420 | |
2421 | spin_lock_bh(&ma->mca_lock); | |
2422 | if (del_timer(&ma->mca_timer)) { | |
d3981bc6 | 2423 | refcount_dec(&ma->mca_refcnt); |
1da177e4 LT |
2424 | delay = ma->mca_timer.expires - jiffies; |
2425 | } | |
2426 | ||
2427 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
d3981bc6 | 2428 | refcount_inc(&ma->mca_refcnt); |
1da177e4 LT |
2429 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; |
2430 | spin_unlock_bh(&ma->mca_lock); | |
2431 | } | |
2432 | ||
2433 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2434 | struct inet6_dev *idev) | |
2435 | { | |
2436 | int err; | |
2437 | ||
dc012f36 | 2438 | write_lock_bh(&iml->sflock); |
cfcabdcc | 2439 | if (!iml->sflist) { |
1da177e4 | 2440 | /* any-source empty exclude case */ |
dc012f36 ED |
2441 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); |
2442 | } else { | |
2443 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2444 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2445 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2446 | iml->sflist = NULL; | |
1da177e4 | 2447 | } |
dc012f36 | 2448 | write_unlock_bh(&iml->sflock); |
1da177e4 LT |
2449 | return err; |
2450 | } | |
2451 | ||
2452 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2453 | { | |
6c567b78 | 2454 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2455 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2456 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2457 | ICMPV6_MGM_REDUCTION); | |
2458 | } else { | |
2459 | mld_add_delrec(ma->idev, ma); | |
2460 | mld_ifc_event(ma->idev); | |
2461 | } | |
2462 | } | |
2463 | ||
e99e88a9 | 2464 | static void mld_gq_timer_expire(struct timer_list *t) |
1da177e4 | 2465 | { |
e99e88a9 | 2466 | struct inet6_dev *idev = from_timer(idev, t, mc_gq_timer); |
1da177e4 LT |
2467 | |
2468 | idev->mc_gq_running = 0; | |
2469 | mld_send_report(idev, NULL); | |
9260d3e1 | 2470 | in6_dev_put(idev); |
1da177e4 LT |
2471 | } |
2472 | ||
e99e88a9 | 2473 | static void mld_ifc_timer_expire(struct timer_list *t) |
1da177e4 | 2474 | { |
e99e88a9 | 2475 | struct inet6_dev *idev = from_timer(idev, t, mc_ifc_timer); |
1da177e4 LT |
2476 | |
2477 | mld_send_cr(idev); | |
2478 | if (idev->mc_ifc_count) { | |
2479 | idev->mc_ifc_count--; | |
2480 | if (idev->mc_ifc_count) | |
6c6da928 HL |
2481 | mld_ifc_start_timer(idev, |
2482 | unsolicited_report_interval(idev)); | |
1da177e4 | 2483 | } |
9260d3e1 | 2484 | in6_dev_put(idev); |
1da177e4 LT |
2485 | } |
2486 | ||
2487 | static void mld_ifc_event(struct inet6_dev *idev) | |
2488 | { | |
6c567b78 | 2489 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2490 | return; |
2491 | idev->mc_ifc_count = idev->mc_qrv; | |
2492 | mld_ifc_start_timer(idev, 1); | |
2493 | } | |
2494 | ||
e99e88a9 | 2495 | static void igmp6_timer_handler(struct timer_list *t) |
1da177e4 | 2496 | { |
e99e88a9 | 2497 | struct ifmcaddr6 *ma = from_timer(ma, t, mca_timer); |
1da177e4 | 2498 | |
6c567b78 | 2499 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2500 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2501 | else | |
2502 | mld_send_report(ma->idev, ma); | |
2503 | ||
2504 | spin_lock(&ma->mca_lock); | |
2505 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2506 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2507 | spin_unlock(&ma->mca_lock); | |
2508 | ma_put(ma); | |
2509 | } | |
2510 | ||
75c78500 MS |
2511 | /* Device changing type */ |
2512 | ||
2513 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2514 | { | |
2515 | struct ifmcaddr6 *i; | |
2516 | ||
2517 | /* Install multicast list, except for all-nodes (already installed) */ | |
2518 | ||
2519 | read_lock_bh(&idev->lock); | |
2520 | for (i = idev->mc_list; i; i = i->next) | |
2521 | igmp6_group_dropped(i); | |
2522 | read_unlock_bh(&idev->lock); | |
2523 | } | |
2524 | ||
2525 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2526 | { | |
2527 | ipv6_mc_up(idev); | |
2528 | } | |
2529 | ||
1da177e4 LT |
2530 | /* Device going down */ |
2531 | ||
2532 | void ipv6_mc_down(struct inet6_dev *idev) | |
2533 | { | |
2534 | struct ifmcaddr6 *i; | |
2535 | ||
2536 | /* Withdraw multicast list */ | |
2537 | ||
2538 | read_lock_bh(&idev->lock); | |
1da177e4 | 2539 | |
67ba4152 | 2540 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 | 2541 | igmp6_group_dropped(i); |
1da177e4 | 2542 | |
1666d49e HL |
2543 | /* Should stop timer after group drop. or we will |
2544 | * start timer again in mld_ifc_event() | |
2545 | */ | |
2546 | mld_ifc_stop_timer(idev); | |
2547 | mld_gq_stop_timer(idev); | |
2548 | mld_dad_stop_timer(idev); | |
2549 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2550 | } |
2551 | ||
2f711939 HFS |
2552 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2553 | { | |
2554 | idev->mc_qrv = sysctl_mld_qrv; | |
2555 | idev->mc_qi = MLD_QI_DEFAULT; | |
2556 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2557 | idev->mc_v1_seen = 0; | |
2558 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2559 | } | |
1da177e4 LT |
2560 | |
2561 | /* Device going up */ | |
2562 | ||
2563 | void ipv6_mc_up(struct inet6_dev *idev) | |
2564 | { | |
2565 | struct ifmcaddr6 *i; | |
2566 | ||
2567 | /* Install multicast list, except for all-nodes (already installed) */ | |
2568 | ||
2569 | read_lock_bh(&idev->lock); | |
2f711939 | 2570 | ipv6_mc_reset(idev); |
1666d49e HL |
2571 | for (i = idev->mc_list; i; i = i->next) { |
2572 | mld_del_delrec(idev, i); | |
0ae0d60a | 2573 | igmp6_group_added(i); |
1666d49e | 2574 | } |
1da177e4 LT |
2575 | read_unlock_bh(&idev->lock); |
2576 | } | |
2577 | ||
2578 | /* IPv6 device initialization. */ | |
2579 | ||
2580 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2581 | { | |
1da177e4 | 2582 | write_lock_bh(&idev->lock); |
6457d26b | 2583 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2584 | idev->mc_gq_running = 0; |
e99e88a9 | 2585 | timer_setup(&idev->mc_gq_timer, mld_gq_timer_expire, 0); |
1da177e4 LT |
2586 | idev->mc_tomb = NULL; |
2587 | idev->mc_ifc_count = 0; | |
e99e88a9 KC |
2588 | timer_setup(&idev->mc_ifc_timer, mld_ifc_timer_expire, 0); |
2589 | timer_setup(&idev->mc_dad_timer, mld_dad_timer_expire, 0); | |
2f711939 | 2590 | ipv6_mc_reset(idev); |
1da177e4 | 2591 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2592 | } |
2593 | ||
2594 | /* | |
2595 | * Device is about to be destroyed: clean up. | |
2596 | */ | |
2597 | ||
2598 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2599 | { | |
2600 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2601 | |
2602 | /* Deactivate timers */ | |
2603 | ipv6_mc_down(idev); | |
1666d49e | 2604 | mld_clear_delrec(idev); |
1da177e4 LT |
2605 | |
2606 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2607 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2608 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2609 | * fail. | |
2610 | */ | |
f3ee4010 | 2611 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2612 | |
f3ee4010 YH |
2613 | if (idev->cnf.forwarding) |
2614 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2615 | |
2616 | write_lock_bh(&idev->lock); | |
2617 | while ((i = idev->mc_list) != NULL) { | |
2618 | idev->mc_list = i->next; | |
1da177e4 | 2619 | |
1666d49e | 2620 | write_unlock_bh(&idev->lock); |
1da177e4 | 2621 | ma_put(i); |
1da177e4 LT |
2622 | write_lock_bh(&idev->lock); |
2623 | } | |
2624 | write_unlock_bh(&idev->lock); | |
2625 | } | |
2626 | ||
382ed724 VY |
2627 | static void ipv6_mc_rejoin_groups(struct inet6_dev *idev) |
2628 | { | |
2629 | struct ifmcaddr6 *pmc; | |
2630 | ||
2631 | ASSERT_RTNL(); | |
2632 | ||
2633 | if (mld_in_v1_mode(idev)) { | |
2634 | read_lock_bh(&idev->lock); | |
2635 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) | |
2636 | igmp6_join_group(pmc); | |
2637 | read_unlock_bh(&idev->lock); | |
2638 | } else | |
2639 | mld_send_report(idev, NULL); | |
2640 | } | |
2641 | ||
2642 | static int ipv6_mc_netdev_event(struct notifier_block *this, | |
2643 | unsigned long event, | |
2644 | void *ptr) | |
2645 | { | |
2646 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
2647 | struct inet6_dev *idev = __in6_dev_get(dev); | |
2648 | ||
2649 | switch (event) { | |
2650 | case NETDEV_RESEND_IGMP: | |
2651 | if (idev) | |
2652 | ipv6_mc_rejoin_groups(idev); | |
2653 | break; | |
2654 | default: | |
2655 | break; | |
2656 | } | |
2657 | ||
2658 | return NOTIFY_DONE; | |
2659 | } | |
2660 | ||
2661 | static struct notifier_block igmp6_netdev_notifier = { | |
2662 | .notifier_call = ipv6_mc_netdev_event, | |
2663 | }; | |
2664 | ||
1da177e4 LT |
2665 | #ifdef CONFIG_PROC_FS |
2666 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2667 | struct seq_net_private p; |
1da177e4 LT |
2668 | struct net_device *dev; |
2669 | struct inet6_dev *idev; | |
2670 | }; | |
2671 | ||
2672 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2673 | ||
2674 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2675 | { | |
2676 | struct ifmcaddr6 *im = NULL; | |
2677 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2678 | struct net *net = seq_file_net(seq); |
1da177e4 | 2679 | |
7562f876 | 2680 | state->idev = NULL; |
ce81b76a | 2681 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2682 | struct inet6_dev *idev; |
ce81b76a | 2683 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2684 | if (!idev) |
2685 | continue; | |
2686 | read_lock_bh(&idev->lock); | |
2687 | im = idev->mc_list; | |
2688 | if (im) { | |
2689 | state->idev = idev; | |
2690 | break; | |
2691 | } | |
2692 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2693 | } |
2694 | return im; | |
2695 | } | |
2696 | ||
2697 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2698 | { | |
2699 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2700 | ||
2701 | im = im->next; | |
2702 | while (!im) { | |
53b24b8f | 2703 | if (likely(state->idev)) |
1da177e4 | 2704 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2705 | |
2706 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2707 | if (!state->dev) { |
2708 | state->idev = NULL; | |
2709 | break; | |
2710 | } | |
ce81b76a | 2711 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2712 | if (!state->idev) |
2713 | continue; | |
2714 | read_lock_bh(&state->idev->lock); | |
2715 | im = state->idev->mc_list; | |
2716 | } | |
2717 | return im; | |
2718 | } | |
2719 | ||
2720 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2721 | { | |
2722 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2723 | if (im) | |
2724 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2725 | --pos; | |
2726 | return pos ? NULL : im; | |
2727 | } | |
2728 | ||
2729 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2730 | __acquires(RCU) |
1da177e4 | 2731 | { |
ce81b76a | 2732 | rcu_read_lock(); |
1da177e4 LT |
2733 | return igmp6_mc_get_idx(seq, *pos); |
2734 | } | |
2735 | ||
2736 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2737 | { | |
ce81b76a ED |
2738 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2739 | ||
1da177e4 LT |
2740 | ++*pos; |
2741 | return im; | |
2742 | } | |
2743 | ||
2744 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2745 | __releases(RCU) |
1da177e4 LT |
2746 | { |
2747 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2748 | |
53b24b8f | 2749 | if (likely(state->idev)) { |
1da177e4 | 2750 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2751 | state->idev = NULL; |
2752 | } | |
2753 | state->dev = NULL; | |
ce81b76a | 2754 | rcu_read_unlock(); |
1da177e4 LT |
2755 | } |
2756 | ||
2757 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2758 | { | |
2759 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2760 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2761 | ||
2762 | seq_printf(seq, | |
4b7a4274 | 2763 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2764 | state->dev->ifindex, state->dev->name, |
b071195d | 2765 | &im->mca_addr, |
1da177e4 LT |
2766 | im->mca_users, im->mca_flags, |
2767 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2768 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2769 | return 0; | |
2770 | } | |
2771 | ||
56b3d975 | 2772 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2773 | .start = igmp6_mc_seq_start, |
2774 | .next = igmp6_mc_seq_next, | |
2775 | .stop = igmp6_mc_seq_stop, | |
2776 | .show = igmp6_mc_seq_show, | |
2777 | }; | |
2778 | ||
1da177e4 | 2779 | struct igmp6_mcf_iter_state { |
b8ad0cbc | 2780 | struct seq_net_private p; |
1da177e4 LT |
2781 | struct net_device *dev; |
2782 | struct inet6_dev *idev; | |
2783 | struct ifmcaddr6 *im; | |
2784 | }; | |
2785 | ||
2786 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2787 | ||
2788 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2789 | { | |
2790 | struct ip6_sf_list *psf = NULL; | |
2791 | struct ifmcaddr6 *im = NULL; | |
2792 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2793 | struct net *net = seq_file_net(seq); |
1da177e4 | 2794 | |
7562f876 PE |
2795 | state->idev = NULL; |
2796 | state->im = NULL; | |
ce81b76a | 2797 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2798 | struct inet6_dev *idev; |
ce81b76a | 2799 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2800 | if (unlikely(idev == NULL)) |
2801 | continue; | |
2802 | read_lock_bh(&idev->lock); | |
2803 | im = idev->mc_list; | |
53b24b8f | 2804 | if (likely(im)) { |
1da177e4 LT |
2805 | spin_lock_bh(&im->mca_lock); |
2806 | psf = im->mca_sources; | |
53b24b8f | 2807 | if (likely(psf)) { |
1da177e4 LT |
2808 | state->im = im; |
2809 | state->idev = idev; | |
2810 | break; | |
2811 | } | |
2812 | spin_unlock_bh(&im->mca_lock); | |
2813 | } | |
2814 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2815 | } |
2816 | return psf; | |
2817 | } | |
2818 | ||
2819 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2820 | { | |
2821 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2822 | ||
2823 | psf = psf->sf_next; | |
2824 | while (!psf) { | |
2825 | spin_unlock_bh(&state->im->mca_lock); | |
2826 | state->im = state->im->next; | |
2827 | while (!state->im) { | |
53b24b8f | 2828 | if (likely(state->idev)) |
1da177e4 | 2829 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2830 | |
2831 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2832 | if (!state->dev) { |
2833 | state->idev = NULL; | |
2834 | goto out; | |
2835 | } | |
ce81b76a | 2836 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2837 | if (!state->idev) |
2838 | continue; | |
2839 | read_lock_bh(&state->idev->lock); | |
2840 | state->im = state->idev->mc_list; | |
2841 | } | |
2842 | if (!state->im) | |
2843 | break; | |
2844 | spin_lock_bh(&state->im->mca_lock); | |
2845 | psf = state->im->mca_sources; | |
2846 | } | |
2847 | out: | |
2848 | return psf; | |
2849 | } | |
2850 | ||
2851 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2852 | { | |
2853 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2854 | if (psf) | |
2855 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2856 | --pos; | |
2857 | return pos ? NULL : psf; | |
2858 | } | |
2859 | ||
2860 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2861 | __acquires(RCU) |
1da177e4 | 2862 | { |
ce81b76a | 2863 | rcu_read_lock(); |
1da177e4 LT |
2864 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2865 | } | |
2866 | ||
2867 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2868 | { | |
2869 | struct ip6_sf_list *psf; | |
2870 | if (v == SEQ_START_TOKEN) | |
2871 | psf = igmp6_mcf_get_first(seq); | |
2872 | else | |
2873 | psf = igmp6_mcf_get_next(seq, v); | |
2874 | ++*pos; | |
2875 | return psf; | |
2876 | } | |
2877 | ||
2878 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2879 | __releases(RCU) |
1da177e4 LT |
2880 | { |
2881 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
53b24b8f | 2882 | if (likely(state->im)) { |
1da177e4 LT |
2883 | spin_unlock_bh(&state->im->mca_lock); |
2884 | state->im = NULL; | |
2885 | } | |
53b24b8f | 2886 | if (likely(state->idev)) { |
1da177e4 | 2887 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2888 | state->idev = NULL; |
2889 | } | |
2890 | state->dev = NULL; | |
ce81b76a | 2891 | rcu_read_unlock(); |
1da177e4 LT |
2892 | } |
2893 | ||
2894 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2895 | { | |
2896 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2897 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2898 | ||
2899 | if (v == SEQ_START_TOKEN) { | |
1744bea1 | 2900 | seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n"); |
1da177e4 LT |
2901 | } else { |
2902 | seq_printf(seq, | |
4b7a4274 | 2903 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2904 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2905 | &state->im->mca_addr, |
2906 | &psf->sf_addr, | |
1da177e4 LT |
2907 | psf->sf_count[MCAST_INCLUDE], |
2908 | psf->sf_count[MCAST_EXCLUDE]); | |
2909 | } | |
2910 | return 0; | |
2911 | } | |
2912 | ||
56b3d975 | 2913 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2914 | .start = igmp6_mcf_seq_start, |
2915 | .next = igmp6_mcf_seq_next, | |
2916 | .stop = igmp6_mcf_seq_stop, | |
2917 | .show = igmp6_mcf_seq_show, | |
2918 | }; | |
2919 | ||
2c8c1e72 | 2920 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2921 | { |
2922 | int err; | |
2923 | ||
2924 | err = -ENOMEM; | |
c3506372 CH |
2925 | if (!proc_create_net("igmp6", 0444, net->proc_net, &igmp6_mc_seq_ops, |
2926 | sizeof(struct igmp6_mc_iter_state))) | |
ea82edf7 | 2927 | goto out; |
c3506372 CH |
2928 | if (!proc_create_net("mcfilter6", 0444, net->proc_net, |
2929 | &igmp6_mcf_seq_ops, | |
2930 | sizeof(struct igmp6_mcf_iter_state))) | |
ea82edf7 DL |
2931 | goto out_proc_net_igmp6; |
2932 | ||
2933 | err = 0; | |
2934 | out: | |
2935 | return err; | |
2936 | ||
2937 | out_proc_net_igmp6: | |
ece31ffd | 2938 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2939 | goto out; |
2940 | } | |
2941 | ||
2c8c1e72 | 2942 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2943 | { |
ece31ffd G |
2944 | remove_proc_entry("mcfilter6", net->proc_net); |
2945 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2946 | } |
2947 | #else | |
2c8c1e72 | 2948 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2949 | { |
2950 | return 0; | |
2951 | } | |
2c8c1e72 | 2952 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2953 | { |
ea82edf7 | 2954 | } |
1da177e4 LT |
2955 | #endif |
2956 | ||
2c8c1e72 | 2957 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2958 | { |
1da177e4 LT |
2959 | int err; |
2960 | ||
1ed8516f DL |
2961 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2962 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2963 | if (err < 0) { |
f3213831 | 2964 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2965 | err); |
b8ad0cbc | 2966 | goto out; |
1da177e4 LT |
2967 | } |
2968 | ||
1ed8516f | 2969 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2970 | |
93a714d6 MC |
2971 | err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6, |
2972 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
2973 | if (err < 0) { | |
2974 | pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n", | |
2975 | err); | |
2976 | goto out_sock_create; | |
2977 | } | |
2978 | ||
ea82edf7 DL |
2979 | err = igmp6_proc_init(net); |
2980 | if (err) | |
93a714d6 MC |
2981 | goto out_sock_create_autojoin; |
2982 | ||
2983 | return 0; | |
b8ad0cbc | 2984 | |
93a714d6 MC |
2985 | out_sock_create_autojoin: |
2986 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); | |
b8ad0cbc | 2987 | out_sock_create: |
1ed8516f | 2988 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 MC |
2989 | out: |
2990 | return err; | |
1da177e4 LT |
2991 | } |
2992 | ||
2c8c1e72 | 2993 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2994 | { |
1ed8516f | 2995 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 | 2996 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); |
ea82edf7 | 2997 | igmp6_proc_exit(net); |
1da177e4 | 2998 | } |
b8ad0cbc DL |
2999 | |
3000 | static struct pernet_operations igmp6_net_ops = { | |
3001 | .init = igmp6_net_init, | |
3002 | .exit = igmp6_net_exit, | |
3003 | }; | |
3004 | ||
3005 | int __init igmp6_init(void) | |
3006 | { | |
3007 | return register_pernet_subsys(&igmp6_net_ops); | |
3008 | } | |
3009 | ||
382ed724 VY |
3010 | int __init igmp6_late_init(void) |
3011 | { | |
3012 | return register_netdevice_notifier(&igmp6_netdev_notifier); | |
3013 | } | |
3014 | ||
b8ad0cbc DL |
3015 | void igmp6_cleanup(void) |
3016 | { | |
3017 | unregister_pernet_subsys(&igmp6_net_ops); | |
3018 | } | |
382ed724 VY |
3019 | |
3020 | void igmp6_late_cleanup(void) | |
3021 | { | |
3022 | unregister_netdevice_notifier(&igmp6_netdev_notifier); | |
3023 | } |