Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IP multicast routing support for mrouted 3.6/3.8 |
| 3 | * |
Alan Cox | 113aa83 | 2008-10-13 19:01:08 -0700 | [diff] [blame] | 4 | * (c) 1995 Alan Cox, <alan@lxorguk.ukuu.org.uk> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Linux Consultancy and Custom Driver Development |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * Fixes: |
| 13 | * Michael Chastain : Incorrect size of copying. |
| 14 | * Alan Cox : Added the cache manager code |
| 15 | * Alan Cox : Fixed the clone/copy bug and device race. |
| 16 | * Mike McLagan : Routing by source |
| 17 | * Malcolm Beattie : Buffer handling fixes. |
| 18 | * Alexey Kuznetsov : Double buffer free and other fixes. |
| 19 | * SVR Anand : Fixed several multicast bugs and problems. |
| 20 | * Alexey Kuznetsov : Status, optimisations and more. |
| 21 | * Brad Parker : Better behaviour on mrouted upcall |
| 22 | * overflow. |
| 23 | * Carlos Picoto : PIMv1 Support |
| 24 | * Pavlin Ivanov Radoslavov: PIMv2 Registers must checksum only PIM header |
Gilles Espinasse | f77f13e | 2010-03-29 15:41:47 +0200 | [diff] [blame] | 25 | * Relax this requirement to work with older peers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | * |
| 27 | */ |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <asm/uaccess.h> |
| 30 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 31 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/errno.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/mm.h> |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/fcntl.h> |
| 37 | #include <linux/stat.h> |
| 38 | #include <linux/socket.h> |
| 39 | #include <linux/in.h> |
| 40 | #include <linux/inet.h> |
| 41 | #include <linux/netdevice.h> |
| 42 | #include <linux/inetdevice.h> |
| 43 | #include <linux/igmp.h> |
| 44 | #include <linux/proc_fs.h> |
| 45 | #include <linux/seq_file.h> |
| 46 | #include <linux/mroute.h> |
| 47 | #include <linux/init.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 48 | #include <linux/if_ether.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 50 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <net/ip.h> |
| 52 | #include <net/protocol.h> |
| 53 | #include <linux/skbuff.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 54 | #include <net/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include <net/sock.h> |
| 56 | #include <net/icmp.h> |
| 57 | #include <net/udp.h> |
| 58 | #include <net/raw.h> |
| 59 | #include <linux/notifier.h> |
| 60 | #include <linux/if_arp.h> |
| 61 | #include <linux/netfilter_ipv4.h> |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 62 | #include <linux/compat.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 63 | #include <linux/export.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 64 | #include <net/ip_tunnels.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #include <net/checksum.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 66 | #include <net/netlink.h> |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 67 | #include <net/fib_rules.h> |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 68 | #include <linux/netconf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) |
| 71 | #define CONFIG_IP_PIMSM 1 |
| 72 | #endif |
| 73 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 74 | struct mr_table { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 75 | struct list_head list; |
Eric W. Biederman | 0c5c9fb | 2015-03-11 23:06:44 -0500 | [diff] [blame] | 76 | possible_net_t net; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 77 | u32 id; |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 78 | struct sock __rcu *mroute_sk; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 79 | struct timer_list ipmr_expire_timer; |
| 80 | struct list_head mfc_unres_queue; |
| 81 | struct list_head mfc_cache_array[MFC_LINES]; |
| 82 | struct vif_device vif_table[MAXVIFS]; |
| 83 | int maxvif; |
| 84 | atomic_t cache_resolve_queue_len; |
Joe Perches | 53d6841 | 2012-11-25 09:35:30 +0000 | [diff] [blame] | 85 | bool mroute_do_assert; |
| 86 | bool mroute_do_pim; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 87 | #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) |
| 88 | int mroute_reg_vif_num; |
| 89 | #endif |
| 90 | }; |
| 91 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 92 | struct ipmr_rule { |
| 93 | struct fib_rule common; |
| 94 | }; |
| 95 | |
| 96 | struct ipmr_result { |
| 97 | struct mr_table *mrt; |
| 98 | }; |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | /* Big lock, protecting vif table, mrt cache and mroute socket state. |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 101 | * Note that the changes are semaphored via rtnl_lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | */ |
| 103 | |
| 104 | static DEFINE_RWLOCK(mrt_lock); |
| 105 | |
| 106 | /* |
| 107 | * Multicast router control variables |
| 108 | */ |
| 109 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 110 | #define VIF_EXISTS(_mrt, _idx) ((_mrt)->vif_table[_idx].dev != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | /* Special spinlock for queue of unresolved entries */ |
| 113 | static DEFINE_SPINLOCK(mfc_unres_lock); |
| 114 | |
| 115 | /* We return to original Alan's scheme. Hash table of resolved |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 116 | * entries is changed only in process context and protected |
| 117 | * with weak lock mrt_lock. Queue of unresolved entries is protected |
| 118 | * with strong spinlock mfc_unres_lock. |
| 119 | * |
| 120 | * In this case data path is free of exclusive locks at all. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | */ |
| 122 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 123 | static struct kmem_cache *mrt_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 125 | static struct mr_table *ipmr_new_table(struct net *net, u32 id); |
Francesco Ruggeri | acbb219 | 2012-08-24 07:38:35 +0000 | [diff] [blame] | 126 | static void ipmr_free_table(struct mr_table *mrt); |
| 127 | |
Rami Rosen | c4854ec | 2013-07-20 15:09:28 +0300 | [diff] [blame] | 128 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
| 129 | struct sk_buff *skb, struct mfc_cache *cache, |
| 130 | int local); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 131 | static int ipmr_cache_report(struct mr_table *mrt, |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 132 | struct sk_buff *pkt, vifi_t vifi, int assert); |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 133 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
| 134 | struct mfc_cache *c, struct rtmsg *rtm); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 135 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, |
| 136 | int cmd); |
Francesco Ruggeri | acbb219 | 2012-08-24 07:38:35 +0000 | [diff] [blame] | 137 | static void mroute_clean_tables(struct mr_table *mrt); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 138 | static void ipmr_expire_process(unsigned long arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 140 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES |
| 141 | #define ipmr_for_each_table(mrt, net) \ |
| 142 | list_for_each_entry_rcu(mrt, &net->ipv4.mr_tables, list) |
| 143 | |
| 144 | static struct mr_table *ipmr_get_table(struct net *net, u32 id) |
| 145 | { |
| 146 | struct mr_table *mrt; |
| 147 | |
| 148 | ipmr_for_each_table(mrt, net) { |
| 149 | if (mrt->id == id) |
| 150 | return mrt; |
| 151 | } |
| 152 | return NULL; |
| 153 | } |
| 154 | |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 155 | static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4, |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 156 | struct mr_table **mrt) |
| 157 | { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 158 | int err; |
Hannes Frederic Sowa | 95f4a45 | 2014-01-13 02:45:22 +0100 | [diff] [blame] | 159 | struct ipmr_result res; |
| 160 | struct fib_lookup_arg arg = { |
| 161 | .result = &res, |
| 162 | .flags = FIB_LOOKUP_NOREF, |
| 163 | }; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 164 | |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 165 | err = fib_rules_lookup(net->ipv4.mr_rules_ops, |
| 166 | flowi4_to_flowi(flp4), 0, &arg); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 167 | if (err < 0) |
| 168 | return err; |
| 169 | *mrt = res.mrt; |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp, |
| 174 | int flags, struct fib_lookup_arg *arg) |
| 175 | { |
| 176 | struct ipmr_result *res = arg->result; |
| 177 | struct mr_table *mrt; |
| 178 | |
| 179 | switch (rule->action) { |
| 180 | case FR_ACT_TO_TBL: |
| 181 | break; |
| 182 | case FR_ACT_UNREACHABLE: |
| 183 | return -ENETUNREACH; |
| 184 | case FR_ACT_PROHIBIT: |
| 185 | return -EACCES; |
| 186 | case FR_ACT_BLACKHOLE: |
| 187 | default: |
| 188 | return -EINVAL; |
| 189 | } |
| 190 | |
| 191 | mrt = ipmr_get_table(rule->fr_net, rule->table); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 192 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 193 | return -EAGAIN; |
| 194 | res->mrt = mrt; |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | static int ipmr_rule_match(struct fib_rule *rule, struct flowi *fl, int flags) |
| 199 | { |
| 200 | return 1; |
| 201 | } |
| 202 | |
| 203 | static const struct nla_policy ipmr_rule_policy[FRA_MAX + 1] = { |
| 204 | FRA_GENERIC_POLICY, |
| 205 | }; |
| 206 | |
| 207 | static int ipmr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, |
| 208 | struct fib_rule_hdr *frh, struct nlattr **tb) |
| 209 | { |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | static int ipmr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, |
| 214 | struct nlattr **tb) |
| 215 | { |
| 216 | return 1; |
| 217 | } |
| 218 | |
| 219 | static int ipmr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, |
| 220 | struct fib_rule_hdr *frh) |
| 221 | { |
| 222 | frh->dst_len = 0; |
| 223 | frh->src_len = 0; |
| 224 | frh->tos = 0; |
| 225 | return 0; |
| 226 | } |
| 227 | |
Andi Kleen | 04a6f82 | 2012-10-04 17:12:11 -0700 | [diff] [blame] | 228 | static const struct fib_rules_ops __net_initconst ipmr_rules_ops_template = { |
Patrick McHardy | 25239ce | 2010-04-26 16:02:05 +0200 | [diff] [blame] | 229 | .family = RTNL_FAMILY_IPMR, |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 230 | .rule_size = sizeof(struct ipmr_rule), |
| 231 | .addr_size = sizeof(u32), |
| 232 | .action = ipmr_rule_action, |
| 233 | .match = ipmr_rule_match, |
| 234 | .configure = ipmr_rule_configure, |
| 235 | .compare = ipmr_rule_compare, |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 236 | .fill = ipmr_rule_fill, |
| 237 | .nlgroup = RTNLGRP_IPV4_RULE, |
| 238 | .policy = ipmr_rule_policy, |
| 239 | .owner = THIS_MODULE, |
| 240 | }; |
| 241 | |
| 242 | static int __net_init ipmr_rules_init(struct net *net) |
| 243 | { |
| 244 | struct fib_rules_ops *ops; |
| 245 | struct mr_table *mrt; |
| 246 | int err; |
| 247 | |
| 248 | ops = fib_rules_register(&ipmr_rules_ops_template, net); |
| 249 | if (IS_ERR(ops)) |
| 250 | return PTR_ERR(ops); |
| 251 | |
| 252 | INIT_LIST_HEAD(&net->ipv4.mr_tables); |
| 253 | |
| 254 | mrt = ipmr_new_table(net, RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 255 | if (!mrt) { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 256 | err = -ENOMEM; |
| 257 | goto err1; |
| 258 | } |
| 259 | |
| 260 | err = fib_default_rule_add(ops, 0x7fff, RT_TABLE_DEFAULT, 0); |
| 261 | if (err < 0) |
| 262 | goto err2; |
| 263 | |
| 264 | net->ipv4.mr_rules_ops = ops; |
| 265 | return 0; |
| 266 | |
| 267 | err2: |
WANG Cong | f243e5a | 2015-03-25 14:45:03 -0700 | [diff] [blame] | 268 | ipmr_free_table(mrt); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 269 | err1: |
| 270 | fib_rules_unregister(ops); |
| 271 | return err; |
| 272 | } |
| 273 | |
| 274 | static void __net_exit ipmr_rules_exit(struct net *net) |
| 275 | { |
| 276 | struct mr_table *mrt, *next; |
| 277 | |
WANG Cong | ed78530 | 2015-03-31 11:01:45 -0700 | [diff] [blame] | 278 | rtnl_lock(); |
Eric Dumazet | 035320d | 2010-06-06 23:48:40 +0000 | [diff] [blame] | 279 | list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) { |
| 280 | list_del(&mrt->list); |
Francesco Ruggeri | acbb219 | 2012-08-24 07:38:35 +0000 | [diff] [blame] | 281 | ipmr_free_table(mrt); |
Eric Dumazet | 035320d | 2010-06-06 23:48:40 +0000 | [diff] [blame] | 282 | } |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 283 | fib_rules_unregister(net->ipv4.mr_rules_ops); |
WANG Cong | 419df12 | 2015-03-31 11:01:46 -0700 | [diff] [blame] | 284 | rtnl_unlock(); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 285 | } |
| 286 | #else |
| 287 | #define ipmr_for_each_table(mrt, net) \ |
| 288 | for (mrt = net->ipv4.mrt; mrt; mrt = NULL) |
| 289 | |
| 290 | static struct mr_table *ipmr_get_table(struct net *net, u32 id) |
| 291 | { |
| 292 | return net->ipv4.mrt; |
| 293 | } |
| 294 | |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 295 | static int ipmr_fib_lookup(struct net *net, struct flowi4 *flp4, |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 296 | struct mr_table **mrt) |
| 297 | { |
| 298 | *mrt = net->ipv4.mrt; |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static int __net_init ipmr_rules_init(struct net *net) |
| 303 | { |
| 304 | net->ipv4.mrt = ipmr_new_table(net, RT_TABLE_DEFAULT); |
| 305 | return net->ipv4.mrt ? 0 : -ENOMEM; |
| 306 | } |
| 307 | |
| 308 | static void __net_exit ipmr_rules_exit(struct net *net) |
| 309 | { |
WANG Cong | ed78530 | 2015-03-31 11:01:45 -0700 | [diff] [blame] | 310 | rtnl_lock(); |
Francesco Ruggeri | acbb219 | 2012-08-24 07:38:35 +0000 | [diff] [blame] | 311 | ipmr_free_table(net->ipv4.mrt); |
WANG Cong | ed78530 | 2015-03-31 11:01:45 -0700 | [diff] [blame] | 312 | net->ipv4.mrt = NULL; |
| 313 | rtnl_unlock(); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 314 | } |
| 315 | #endif |
| 316 | |
| 317 | static struct mr_table *ipmr_new_table(struct net *net, u32 id) |
| 318 | { |
| 319 | struct mr_table *mrt; |
| 320 | unsigned int i; |
| 321 | |
| 322 | mrt = ipmr_get_table(net, id); |
Ian Morris | 00db412 | 2015-04-03 09:17:27 +0100 | [diff] [blame] | 323 | if (mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 324 | return mrt; |
| 325 | |
| 326 | mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 327 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 328 | return NULL; |
Patrick McHardy | 8de53df | 2010-04-15 13:29:28 +0200 | [diff] [blame] | 329 | write_pnet(&mrt->net, net); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 330 | mrt->id = id; |
| 331 | |
| 332 | /* Forwarding cache */ |
| 333 | for (i = 0; i < MFC_LINES; i++) |
| 334 | INIT_LIST_HEAD(&mrt->mfc_cache_array[i]); |
| 335 | |
| 336 | INIT_LIST_HEAD(&mrt->mfc_unres_queue); |
| 337 | |
| 338 | setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, |
| 339 | (unsigned long)mrt); |
| 340 | |
| 341 | #ifdef CONFIG_IP_PIMSM |
| 342 | mrt->mroute_reg_vif_num = -1; |
| 343 | #endif |
| 344 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES |
| 345 | list_add_tail_rcu(&mrt->list, &net->ipv4.mr_tables); |
| 346 | #endif |
| 347 | return mrt; |
| 348 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
Francesco Ruggeri | acbb219 | 2012-08-24 07:38:35 +0000 | [diff] [blame] | 350 | static void ipmr_free_table(struct mr_table *mrt) |
| 351 | { |
| 352 | del_timer_sync(&mrt->ipmr_expire_timer); |
| 353 | mroute_clean_tables(mrt); |
| 354 | kfree(mrt); |
| 355 | } |
| 356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ |
| 358 | |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 359 | static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) |
| 360 | { |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 361 | struct net *net = dev_net(dev); |
| 362 | |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 363 | dev_close(dev); |
| 364 | |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 365 | dev = __dev_get_by_name(net, "tunl0"); |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 366 | if (dev) { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 367 | const struct net_device_ops *ops = dev->netdev_ops; |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 368 | struct ifreq ifr; |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 369 | struct ip_tunnel_parm p; |
| 370 | |
| 371 | memset(&p, 0, sizeof(p)); |
| 372 | p.iph.daddr = v->vifc_rmt_addr.s_addr; |
| 373 | p.iph.saddr = v->vifc_lcl_addr.s_addr; |
| 374 | p.iph.version = 4; |
| 375 | p.iph.ihl = 5; |
| 376 | p.iph.protocol = IPPROTO_IPIP; |
| 377 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); |
| 378 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
| 379 | |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 380 | if (ops->ndo_do_ioctl) { |
| 381 | mm_segment_t oldfs = get_fs(); |
| 382 | |
| 383 | set_fs(KERNEL_DS); |
| 384 | ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); |
| 385 | set_fs(oldfs); |
| 386 | } |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 387 | } |
| 388 | } |
| 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | static |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 391 | struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | { |
| 393 | struct net_device *dev; |
| 394 | |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 395 | dev = __dev_get_by_name(net, "tunl0"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
| 397 | if (dev) { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 398 | const struct net_device_ops *ops = dev->netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | int err; |
| 400 | struct ifreq ifr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | struct ip_tunnel_parm p; |
| 402 | struct in_device *in_dev; |
| 403 | |
| 404 | memset(&p, 0, sizeof(p)); |
| 405 | p.iph.daddr = v->vifc_rmt_addr.s_addr; |
| 406 | p.iph.saddr = v->vifc_lcl_addr.s_addr; |
| 407 | p.iph.version = 4; |
| 408 | p.iph.ihl = 5; |
| 409 | p.iph.protocol = IPPROTO_IPIP; |
| 410 | sprintf(p.name, "dvmrp%d", v->vifc_vifi); |
Stephen Hemminger | ba93ef7 | 2008-01-21 17:28:59 -0800 | [diff] [blame] | 411 | ifr.ifr_ifru.ifru_data = (__force void __user *)&p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 413 | if (ops->ndo_do_ioctl) { |
| 414 | mm_segment_t oldfs = get_fs(); |
| 415 | |
| 416 | set_fs(KERNEL_DS); |
| 417 | err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); |
| 418 | set_fs(oldfs); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 419 | } else { |
Stephen Hemminger | 5bc3eb7 | 2008-11-19 21:52:05 -0800 | [diff] [blame] | 420 | err = -EOPNOTSUPP; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 421 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | dev = NULL; |
| 423 | |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 424 | if (err == 0 && |
| 425 | (dev = __dev_get_by_name(net, p.name)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | dev->flags |= IFF_MULTICAST; |
| 427 | |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 428 | in_dev = __in_dev_get_rtnl(dev); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 429 | if (!in_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | goto failure; |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 431 | |
| 432 | ipv4_devconf_setall(in_dev); |
Jiri Pirko | 1d4c8c2 | 2013-12-07 19:26:56 +0100 | [diff] [blame] | 433 | neigh_parms_data_state_setall(in_dev->arp_parms); |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 434 | IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | if (dev_open(dev)) |
| 437 | goto failure; |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 438 | dev_hold(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
| 440 | } |
| 441 | return dev; |
| 442 | |
| 443 | failure: |
| 444 | /* allow the register to be completed before unregistering. */ |
| 445 | rtnl_unlock(); |
| 446 | rtnl_lock(); |
| 447 | |
| 448 | unregister_netdevice(dev); |
| 449 | return NULL; |
| 450 | } |
| 451 | |
| 452 | #ifdef CONFIG_IP_PIMSM |
| 453 | |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 454 | static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 456 | struct net *net = dev_net(dev); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 457 | struct mr_table *mrt; |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 458 | struct flowi4 fl4 = { |
| 459 | .flowi4_oif = dev->ifindex, |
Cong Wang | 6a66271 | 2014-04-15 16:25:34 -0700 | [diff] [blame] | 460 | .flowi4_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 461 | .flowi4_mark = skb->mark, |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 462 | }; |
| 463 | int err; |
| 464 | |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 465 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
Ben Greear | e40dbc5 | 2010-07-15 13:22:33 +0000 | [diff] [blame] | 466 | if (err < 0) { |
| 467 | kfree_skb(skb); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 468 | return err; |
Ben Greear | e40dbc5 | 2010-07-15 13:22:33 +0000 | [diff] [blame] | 469 | } |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | read_lock(&mrt_lock); |
Pavel Emelyanov | cf3677a | 2008-05-21 14:17:33 -0700 | [diff] [blame] | 472 | dev->stats.tx_bytes += skb->len; |
| 473 | dev->stats.tx_packets++; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 474 | ipmr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, IGMPMSG_WHOLEPKT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | read_unlock(&mrt_lock); |
| 476 | kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 477 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } |
| 479 | |
Nicolas Dichtel | ee9b959 | 2015-04-02 17:07:03 +0200 | [diff] [blame] | 480 | static int reg_vif_get_iflink(const struct net_device *dev) |
| 481 | { |
| 482 | return 0; |
| 483 | } |
| 484 | |
Stephen Hemminger | 007c383 | 2008-11-20 20:28:35 -0800 | [diff] [blame] | 485 | static const struct net_device_ops reg_vif_netdev_ops = { |
| 486 | .ndo_start_xmit = reg_vif_xmit, |
Nicolas Dichtel | ee9b959 | 2015-04-02 17:07:03 +0200 | [diff] [blame] | 487 | .ndo_get_iflink = reg_vif_get_iflink, |
Stephen Hemminger | 007c383 | 2008-11-20 20:28:35 -0800 | [diff] [blame] | 488 | }; |
| 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | static void reg_vif_setup(struct net_device *dev) |
| 491 | { |
| 492 | dev->type = ARPHRD_PIMREG; |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 493 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | dev->flags = IFF_NOARP; |
Himangi Saraogi | 70cb4a4 | 2014-05-30 21:10:48 +0530 | [diff] [blame] | 495 | dev->netdev_ops = ®_vif_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | dev->destructor = free_netdev; |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 497 | dev->features |= NETIF_F_NETNS_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 500 | static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
| 502 | struct net_device *dev; |
| 503 | struct in_device *in_dev; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 504 | char name[IFNAMSIZ]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 506 | if (mrt->id == RT_TABLE_DEFAULT) |
| 507 | sprintf(name, "pimreg"); |
| 508 | else |
| 509 | sprintf(name, "pimreg%u", mrt->id); |
| 510 | |
Tom Gundersen | c835a67 | 2014-07-14 16:37:24 +0200 | [diff] [blame] | 511 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 513 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | return NULL; |
| 515 | |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 516 | dev_net_set(dev, net); |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | if (register_netdevice(dev)) { |
| 519 | free_netdev(dev); |
| 520 | return NULL; |
| 521 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 523 | rcu_read_lock(); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 524 | in_dev = __in_dev_get_rcu(dev); |
| 525 | if (!in_dev) { |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 526 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | goto failure; |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 530 | ipv4_devconf_setall(in_dev); |
Jiri Pirko | 1d4c8c2 | 2013-12-07 19:26:56 +0100 | [diff] [blame] | 531 | neigh_parms_data_state_setall(in_dev->arp_parms); |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 532 | IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0; |
| 533 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
| 535 | if (dev_open(dev)) |
| 536 | goto failure; |
| 537 | |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 538 | dev_hold(dev); |
| 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | return dev; |
| 541 | |
| 542 | failure: |
| 543 | /* allow the register to be completed before unregistering. */ |
| 544 | rtnl_unlock(); |
| 545 | rtnl_lock(); |
| 546 | |
| 547 | unregister_netdevice(dev); |
| 548 | return NULL; |
| 549 | } |
| 550 | #endif |
| 551 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 552 | /** |
| 553 | * vif_delete - Delete a VIF entry |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 554 | * @notify: Set to 1, if the caller is a notifier_call |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 556 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 557 | static int vif_delete(struct mr_table *mrt, int vifi, int notify, |
Eric Dumazet | d17fa6f | 2009-10-28 05:21:38 +0000 | [diff] [blame] | 558 | struct list_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | { |
| 560 | struct vif_device *v; |
| 561 | struct net_device *dev; |
| 562 | struct in_device *in_dev; |
| 563 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 564 | if (vifi < 0 || vifi >= mrt->maxvif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | return -EADDRNOTAVAIL; |
| 566 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 567 | v = &mrt->vif_table[vifi]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | write_lock_bh(&mrt_lock); |
| 570 | dev = v->dev; |
| 571 | v->dev = NULL; |
| 572 | |
| 573 | if (!dev) { |
| 574 | write_unlock_bh(&mrt_lock); |
| 575 | return -EADDRNOTAVAIL; |
| 576 | } |
| 577 | |
| 578 | #ifdef CONFIG_IP_PIMSM |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 579 | if (vifi == mrt->mroute_reg_vif_num) |
| 580 | mrt->mroute_reg_vif_num = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | #endif |
| 582 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 583 | if (vifi + 1 == mrt->maxvif) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | int tmp; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 585 | |
| 586 | for (tmp = vifi - 1; tmp >= 0; tmp--) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 587 | if (VIF_EXISTS(mrt, tmp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | break; |
| 589 | } |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 590 | mrt->maxvif = tmp+1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | } |
| 592 | |
| 593 | write_unlock_bh(&mrt_lock); |
| 594 | |
| 595 | dev_set_allmulti(dev, -1); |
| 596 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 597 | in_dev = __in_dev_get_rtnl(dev); |
| 598 | if (in_dev) { |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 599 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 600 | inet_netconf_notify_devconf(dev_net(dev), |
| 601 | NETCONFA_MC_FORWARDING, |
| 602 | dev->ifindex, &in_dev->cnf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | ip_rt_multicast_event(in_dev); |
| 604 | } |
| 605 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 606 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER) && !notify) |
Eric Dumazet | d17fa6f | 2009-10-28 05:21:38 +0000 | [diff] [blame] | 607 | unregister_netdevice_queue(dev, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
| 609 | dev_put(dev); |
| 610 | return 0; |
| 611 | } |
| 612 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 613 | static void ipmr_cache_free_rcu(struct rcu_head *head) |
| 614 | { |
| 615 | struct mfc_cache *c = container_of(head, struct mfc_cache, rcu); |
| 616 | |
| 617 | kmem_cache_free(mrt_cachep, c); |
| 618 | } |
| 619 | |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 620 | static inline void ipmr_cache_free(struct mfc_cache *c) |
| 621 | { |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 622 | call_rcu(&c->rcu, ipmr_cache_free_rcu); |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 623 | } |
| 624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | /* Destroy an unresolved cache entry, killing queued skbs |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 626 | * and reporting error to netlink readers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | */ |
| 628 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 629 | static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
Patrick McHardy | 8de53df | 2010-04-15 13:29:28 +0200 | [diff] [blame] | 631 | struct net *net = read_pnet(&mrt->net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | struct sk_buff *skb; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 633 | struct nlmsgerr *e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 635 | atomic_dec(&mrt->cache_resolve_queue_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 637 | while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved))) { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 638 | if (ip_hdr(skb)->version == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); |
| 640 | nlh->nlmsg_type = NLMSG_ERROR; |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 641 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | skb_trim(skb, nlh->nlmsg_len); |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 643 | e = nlmsg_data(nlh); |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 644 | e->error = -ETIMEDOUT; |
| 645 | memset(&e->msg, 0, sizeof(e->msg)); |
Thomas Graf | 2942e90 | 2006-08-15 00:30:25 -0700 | [diff] [blame] | 646 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 647 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 648 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | kfree_skb(skb); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 650 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | } |
| 652 | |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 653 | ipmr_cache_free(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | |
Patrick McHardy | e258beb | 2010-04-13 05:03:19 +0000 | [diff] [blame] | 657 | /* Timer process for the unresolved queue. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Patrick McHardy | e258beb | 2010-04-13 05:03:19 +0000 | [diff] [blame] | 659 | static void ipmr_expire_process(unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 661 | struct mr_table *mrt = (struct mr_table *)arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | unsigned long now; |
| 663 | unsigned long expires; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 664 | struct mfc_cache *c, *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
| 666 | if (!spin_trylock(&mfc_unres_lock)) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 667 | mod_timer(&mrt->ipmr_expire_timer, jiffies+HZ/10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | return; |
| 669 | } |
| 670 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 671 | if (list_empty(&mrt->mfc_unres_queue)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | goto out; |
| 673 | |
| 674 | now = jiffies; |
| 675 | expires = 10*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 677 | list_for_each_entry_safe(c, next, &mrt->mfc_unres_queue, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | if (time_after(c->mfc_un.unres.expires, now)) { |
| 679 | unsigned long interval = c->mfc_un.unres.expires - now; |
| 680 | if (interval < expires) |
| 681 | expires = interval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | continue; |
| 683 | } |
| 684 | |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 685 | list_del(&c->list); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 686 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 687 | ipmr_destroy_unres(mrt, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
| 689 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 690 | if (!list_empty(&mrt->mfc_unres_queue)) |
| 691 | mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
| 693 | out: |
| 694 | spin_unlock(&mfc_unres_lock); |
| 695 | } |
| 696 | |
| 697 | /* Fill oifs list. It is called under write locked mrt_lock. */ |
| 698 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 699 | static void ipmr_update_thresholds(struct mr_table *mrt, struct mfc_cache *cache, |
Patrick McHardy | d658f8a | 2010-04-13 05:03:20 +0000 | [diff] [blame] | 700 | unsigned char *ttls) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | { |
| 702 | int vifi; |
| 703 | |
| 704 | cache->mfc_un.res.minvif = MAXVIFS; |
| 705 | cache->mfc_un.res.maxvif = 0; |
| 706 | memset(cache->mfc_un.res.ttls, 255, MAXVIFS); |
| 707 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 708 | for (vifi = 0; vifi < mrt->maxvif; vifi++) { |
| 709 | if (VIF_EXISTS(mrt, vifi) && |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 710 | ttls[vifi] && ttls[vifi] < 255) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | cache->mfc_un.res.ttls[vifi] = ttls[vifi]; |
| 712 | if (cache->mfc_un.res.minvif > vifi) |
| 713 | cache->mfc_un.res.minvif = vifi; |
| 714 | if (cache->mfc_un.res.maxvif <= vifi) |
| 715 | cache->mfc_un.res.maxvif = vifi + 1; |
| 716 | } |
| 717 | } |
| 718 | } |
| 719 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 720 | static int vif_add(struct net *net, struct mr_table *mrt, |
| 721 | struct vifctl *vifc, int mrtsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | { |
| 723 | int vifi = vifc->vifc_vifi; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 724 | struct vif_device *v = &mrt->vif_table[vifi]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | struct net_device *dev; |
| 726 | struct in_device *in_dev; |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 727 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | /* Is vif busy ? */ |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 730 | if (VIF_EXISTS(mrt, vifi)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | return -EADDRINUSE; |
| 732 | |
| 733 | switch (vifc->vifc_flags) { |
| 734 | #ifdef CONFIG_IP_PIMSM |
| 735 | case VIFF_REGISTER: |
| 736 | /* |
| 737 | * Special Purpose VIF in PIM |
| 738 | * All the packets will be sent to the daemon |
| 739 | */ |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 740 | if (mrt->mroute_reg_vif_num >= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | return -EADDRINUSE; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 742 | dev = ipmr_reg_vif(net, mrt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if (!dev) |
| 744 | return -ENOBUFS; |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 745 | err = dev_set_allmulti(dev, 1); |
| 746 | if (err) { |
| 747 | unregister_netdevice(dev); |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 748 | dev_put(dev); |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 749 | return err; |
| 750 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | break; |
| 752 | #endif |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 753 | case VIFF_TUNNEL: |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 754 | dev = ipmr_new_tunnel(net, vifc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | if (!dev) |
| 756 | return -ENOBUFS; |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 757 | err = dev_set_allmulti(dev, 1); |
| 758 | if (err) { |
| 759 | ipmr_del_tunnel(dev, vifc); |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 760 | dev_put(dev); |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 761 | return err; |
| 762 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | break; |
Ilia K | ee5e81f | 2009-09-16 05:53:07 +0000 | [diff] [blame] | 764 | |
| 765 | case VIFF_USE_IFINDEX: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | case 0: |
Ilia K | ee5e81f | 2009-09-16 05:53:07 +0000 | [diff] [blame] | 767 | if (vifc->vifc_flags == VIFF_USE_IFINDEX) { |
| 768 | dev = dev_get_by_index(net, vifc->vifc_lcl_ifindex); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 769 | if (dev && !__in_dev_get_rtnl(dev)) { |
Ilia K | ee5e81f | 2009-09-16 05:53:07 +0000 | [diff] [blame] | 770 | dev_put(dev); |
| 771 | return -EADDRNOTAVAIL; |
| 772 | } |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 773 | } else { |
Ilia K | ee5e81f | 2009-09-16 05:53:07 +0000 | [diff] [blame] | 774 | dev = ip_dev_find(net, vifc->vifc_lcl_addr.s_addr); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 775 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | if (!dev) |
| 777 | return -EADDRNOTAVAIL; |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 778 | err = dev_set_allmulti(dev, 1); |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 779 | if (err) { |
| 780 | dev_put(dev); |
Wang Chen | d607032 | 2008-07-14 20:55:26 -0700 | [diff] [blame] | 781 | return err; |
Wang Chen | 7dc00c8 | 2008-07-14 20:56:34 -0700 | [diff] [blame] | 782 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | break; |
| 784 | default: |
| 785 | return -EINVAL; |
| 786 | } |
| 787 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 788 | in_dev = __in_dev_get_rtnl(dev); |
| 789 | if (!in_dev) { |
Dan Carpenter | d0490cf | 2009-11-11 02:03:54 +0000 | [diff] [blame] | 790 | dev_put(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | return -EADDRNOTAVAIL; |
Dan Carpenter | d0490cf | 2009-11-11 02:03:54 +0000 | [diff] [blame] | 792 | } |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 793 | IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 794 | inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, dev->ifindex, |
| 795 | &in_dev->cnf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | ip_rt_multicast_event(in_dev); |
| 797 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 798 | /* Fill in the VIF structures */ |
| 799 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 800 | v->rate_limit = vifc->vifc_rate_limit; |
| 801 | v->local = vifc->vifc_lcl_addr.s_addr; |
| 802 | v->remote = vifc->vifc_rmt_addr.s_addr; |
| 803 | v->flags = vifc->vifc_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | if (!mrtsock) |
| 805 | v->flags |= VIFF_STATIC; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 806 | v->threshold = vifc->vifc_threshold; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | v->bytes_in = 0; |
| 808 | v->bytes_out = 0; |
| 809 | v->pkt_in = 0; |
| 810 | v->pkt_out = 0; |
| 811 | v->link = dev->ifindex; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 812 | if (v->flags & (VIFF_TUNNEL | VIFF_REGISTER)) |
Nicolas Dichtel | a54acb3 | 2015-04-02 17:07:00 +0200 | [diff] [blame] | 813 | v->link = dev_get_iflink(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | |
| 815 | /* And finish update writing critical data */ |
| 816 | write_lock_bh(&mrt_lock); |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 817 | v->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | #ifdef CONFIG_IP_PIMSM |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 819 | if (v->flags & VIFF_REGISTER) |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 820 | mrt->mroute_reg_vif_num = vifi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | #endif |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 822 | if (vifi+1 > mrt->maxvif) |
| 823 | mrt->maxvif = vifi+1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | write_unlock_bh(&mrt_lock); |
| 825 | return 0; |
| 826 | } |
| 827 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 828 | /* called with rcu_read_lock() */ |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 829 | static struct mfc_cache *ipmr_cache_find(struct mr_table *mrt, |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 830 | __be32 origin, |
| 831 | __be32 mcastgrp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | { |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 833 | int line = MFC_HASH(mcastgrp, origin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | struct mfc_cache *c; |
| 835 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 836 | list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list) { |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 837 | if (c->mfc_origin == origin && c->mfc_mcastgrp == mcastgrp) |
| 838 | return c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | } |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 840 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | } |
| 842 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 843 | /* Look for a (*,*,oif) entry */ |
| 844 | static struct mfc_cache *ipmr_cache_find_any_parent(struct mr_table *mrt, |
| 845 | int vifi) |
| 846 | { |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 847 | int line = MFC_HASH(htonl(INADDR_ANY), htonl(INADDR_ANY)); |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 848 | struct mfc_cache *c; |
| 849 | |
| 850 | list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list) |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 851 | if (c->mfc_origin == htonl(INADDR_ANY) && |
| 852 | c->mfc_mcastgrp == htonl(INADDR_ANY) && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 853 | c->mfc_un.res.ttls[vifi] < 255) |
| 854 | return c; |
| 855 | |
| 856 | return NULL; |
| 857 | } |
| 858 | |
| 859 | /* Look for a (*,G) entry */ |
| 860 | static struct mfc_cache *ipmr_cache_find_any(struct mr_table *mrt, |
| 861 | __be32 mcastgrp, int vifi) |
| 862 | { |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 863 | int line = MFC_HASH(mcastgrp, htonl(INADDR_ANY)); |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 864 | struct mfc_cache *c, *proxy; |
| 865 | |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 866 | if (mcastgrp == htonl(INADDR_ANY)) |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 867 | goto skip; |
| 868 | |
| 869 | list_for_each_entry_rcu(c, &mrt->mfc_cache_array[line], list) |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 870 | if (c->mfc_origin == htonl(INADDR_ANY) && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 871 | c->mfc_mcastgrp == mcastgrp) { |
| 872 | if (c->mfc_un.res.ttls[vifi] < 255) |
| 873 | return c; |
| 874 | |
| 875 | /* It's ok if the vifi is part of the static tree */ |
| 876 | proxy = ipmr_cache_find_any_parent(mrt, |
| 877 | c->mfc_parent); |
| 878 | if (proxy && proxy->mfc_un.res.ttls[vifi] < 255) |
| 879 | return c; |
| 880 | } |
| 881 | |
| 882 | skip: |
| 883 | return ipmr_cache_find_any_parent(mrt, vifi); |
| 884 | } |
| 885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | /* |
| 887 | * Allocate a multicast cache entry |
| 888 | */ |
Patrick McHardy | d658f8a | 2010-04-13 05:03:20 +0000 | [diff] [blame] | 889 | static struct mfc_cache *ipmr_cache_alloc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | { |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 891 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 892 | |
| 893 | if (c) |
| 894 | c->mfc_un.res.minvif = MAXVIFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | return c; |
| 896 | } |
| 897 | |
Patrick McHardy | d658f8a | 2010-04-13 05:03:20 +0000 | [diff] [blame] | 898 | static struct mfc_cache *ipmr_cache_alloc_unres(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | { |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 900 | struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 901 | |
| 902 | if (c) { |
| 903 | skb_queue_head_init(&c->mfc_un.unres.unresolved); |
| 904 | c->mfc_un.unres.expires = jiffies + 10*HZ; |
| 905 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | return c; |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | * A cache entry has gone into a resolved state from queued |
| 911 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 912 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 913 | static void ipmr_cache_resolve(struct net *net, struct mr_table *mrt, |
| 914 | struct mfc_cache *uc, struct mfc_cache *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
| 916 | struct sk_buff *skb; |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 917 | struct nlmsgerr *e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 919 | /* Play the pending entries through our router */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 921 | while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 922 | if (ip_hdr(skb)->version == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); |
| 924 | |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 925 | if (__ipmr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 926 | nlh->nlmsg_len = skb_tail_pointer(skb) - |
| 927 | (u8 *)nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } else { |
| 929 | nlh->nlmsg_type = NLMSG_ERROR; |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 930 | nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | skb_trim(skb, nlh->nlmsg_len); |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 932 | e = nlmsg_data(nlh); |
Patrick McHardy | 9ef1d4c | 2005-06-28 12:55:30 -0700 | [diff] [blame] | 933 | e->error = -EMSGSIZE; |
| 934 | memset(&e->msg, 0, sizeof(e->msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
Thomas Graf | 2942e90 | 2006-08-15 00:30:25 -0700 | [diff] [blame] | 936 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 937 | rtnl_unicast(skb, net, NETLINK_CB(skb).portid); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 938 | } else { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 939 | ip_mr_forward(net, mrt, skb, c, 0); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 940 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | } |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * Bounce a cache query up to mrouted. We could use netlink for this but mrouted |
| 946 | * expects the following bizarre scheme. |
| 947 | * |
| 948 | * Called under mrt_lock. |
| 949 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 950 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 951 | static int ipmr_cache_report(struct mr_table *mrt, |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 952 | struct sk_buff *pkt, vifi_t vifi, int assert) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
| 954 | struct sk_buff *skb; |
Arnaldo Carvalho de Melo | c9bdd4b | 2007-03-12 20:09:15 -0300 | [diff] [blame] | 955 | const int ihl = ip_hdrlen(pkt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | struct igmphdr *igmp; |
| 957 | struct igmpmsg *msg; |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 958 | struct sock *mroute_sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | int ret; |
| 960 | |
| 961 | #ifdef CONFIG_IP_PIMSM |
| 962 | if (assert == IGMPMSG_WHOLEPKT) |
| 963 | skb = skb_realloc_headroom(pkt, sizeof(struct iphdr)); |
| 964 | else |
| 965 | #endif |
| 966 | skb = alloc_skb(128, GFP_ATOMIC); |
| 967 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 968 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | return -ENOBUFS; |
| 970 | |
| 971 | #ifdef CONFIG_IP_PIMSM |
| 972 | if (assert == IGMPMSG_WHOLEPKT) { |
| 973 | /* Ugly, but we have no choice with this interface. |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 974 | * Duplicate old header, fix ihl, length etc. |
| 975 | * And all this only to mangle msg->im_msgtype and |
| 976 | * to set msg->im_mbz to "mbz" :-) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | */ |
Arnaldo Carvalho de Melo | 878c814 | 2007-03-11 22:38:29 -0300 | [diff] [blame] | 978 | skb_push(skb, sizeof(struct iphdr)); |
| 979 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 980 | skb_reset_transport_header(skb); |
Arnaldo Carvalho de Melo | 0272ffc | 2007-03-12 20:05:39 -0300 | [diff] [blame] | 981 | msg = (struct igmpmsg *)skb_network_header(skb); |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 982 | memcpy(msg, skb_network_header(pkt), sizeof(struct iphdr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | msg->im_msgtype = IGMPMSG_WHOLEPKT; |
| 984 | msg->im_mbz = 0; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 985 | msg->im_vif = mrt->mroute_reg_vif_num; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 986 | ip_hdr(skb)->ihl = sizeof(struct iphdr) >> 2; |
| 987 | ip_hdr(skb)->tot_len = htons(ntohs(ip_hdr(pkt)->tot_len) + |
| 988 | sizeof(struct iphdr)); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 989 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | #endif |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 991 | { |
| 992 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 993 | /* Copy the IP header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
Cong Wang | 30f3a40 | 2013-06-05 20:14:10 +0800 | [diff] [blame] | 995 | skb_set_network_header(skb, skb->len); |
Arnaldo Carvalho de Melo | ddc7b8e | 2007-03-15 21:42:27 -0300 | [diff] [blame] | 996 | skb_put(skb, ihl); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 997 | skb_copy_to_linear_data(skb, pkt->data, ihl); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 998 | ip_hdr(skb)->protocol = 0; /* Flag to the kernel this is a route add */ |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 999 | msg = (struct igmpmsg *)skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | msg->im_vif = vifi; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1001 | skb_dst_set(skb, dst_clone(skb_dst(pkt))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1003 | /* Add our header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1005 | igmp = (struct igmphdr *)skb_put(skb, sizeof(struct igmphdr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | igmp->type = |
| 1007 | msg->im_msgtype = assert; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1008 | igmp->code = 0; |
| 1009 | ip_hdr(skb)->tot_len = htons(skb->len); /* Fix the length */ |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 1010 | skb->transport_header = skb->network_header; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1011 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1013 | rcu_read_lock(); |
| 1014 | mroute_sk = rcu_dereference(mrt->mroute_sk); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1015 | if (!mroute_sk) { |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1016 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | kfree_skb(skb); |
| 1018 | return -EINVAL; |
| 1019 | } |
| 1020 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1021 | /* Deliver to mrouted */ |
| 1022 | |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1023 | ret = sock_queue_rcv_skb(mroute_sk, skb); |
| 1024 | rcu_read_unlock(); |
Benjamin Thery | 70a269e | 2009-01-22 04:56:15 +0000 | [diff] [blame] | 1025 | if (ret < 0) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1026 | net_warn_ratelimited("mroute: pending queue full, dropping entries\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | kfree_skb(skb); |
| 1028 | } |
| 1029 | |
| 1030 | return ret; |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | * Queue a packet for resolution. It gets locked cache entry! |
| 1035 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | static int |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1038 | ipmr_cache_unresolved(struct mr_table *mrt, vifi_t vifi, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | { |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1040 | bool found = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | int err; |
| 1042 | struct mfc_cache *c; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1043 | const struct iphdr *iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
| 1045 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1046 | list_for_each_entry(c, &mrt->mfc_unres_queue, list) { |
Patrick McHardy | e258beb | 2010-04-13 05:03:19 +0000 | [diff] [blame] | 1047 | if (c->mfc_mcastgrp == iph->daddr && |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1048 | c->mfc_origin == iph->saddr) { |
| 1049 | found = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | break; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1051 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | } |
| 1053 | |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1054 | if (!found) { |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1055 | /* Create a new entry if allowable */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1057 | if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || |
Patrick McHardy | d658f8a | 2010-04-13 05:03:20 +0000 | [diff] [blame] | 1058 | (c = ipmr_cache_alloc_unres()) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | spin_unlock_bh(&mfc_unres_lock); |
| 1060 | |
| 1061 | kfree_skb(skb); |
| 1062 | return -ENOBUFS; |
| 1063 | } |
| 1064 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1065 | /* Fill in the new cache entry */ |
| 1066 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1067 | c->mfc_parent = -1; |
| 1068 | c->mfc_origin = iph->saddr; |
| 1069 | c->mfc_mcastgrp = iph->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1071 | /* Reflect first query at mrouted. */ |
| 1072 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1073 | err = ipmr_cache_report(mrt, skb, vifi, IGMPMSG_NOCACHE); |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1074 | if (err < 0) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1075 | /* If the report failed throw the cache entry |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | out - Brad Parker |
| 1077 | */ |
| 1078 | spin_unlock_bh(&mfc_unres_lock); |
| 1079 | |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 1080 | ipmr_cache_free(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | kfree_skb(skb); |
| 1082 | return err; |
| 1083 | } |
| 1084 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1085 | atomic_inc(&mrt->cache_resolve_queue_len); |
| 1086 | list_add(&c->list, &mrt->mfc_unres_queue); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 1087 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
David S. Miller | 278554b | 2010-05-12 00:05:35 -0700 | [diff] [blame] | 1089 | if (atomic_read(&mrt->cache_resolve_queue_len) == 1) |
| 1090 | mod_timer(&mrt->ipmr_expire_timer, c->mfc_un.unres.expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
| 1092 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1093 | /* See if we can append the packet */ |
| 1094 | |
| 1095 | if (c->mfc_un.unres.unresolved.qlen > 3) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | kfree_skb(skb); |
| 1097 | err = -ENOBUFS; |
| 1098 | } else { |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1099 | skb_queue_tail(&c->mfc_un.unres.unresolved, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | err = 0; |
| 1101 | } |
| 1102 | |
| 1103 | spin_unlock_bh(&mfc_unres_lock); |
| 1104 | return err; |
| 1105 | } |
| 1106 | |
| 1107 | /* |
| 1108 | * MFC cache manipulation by user space mroute daemon |
| 1109 | */ |
| 1110 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1111 | static int ipmr_mfc_delete(struct mr_table *mrt, struct mfcctl *mfc, int parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
| 1113 | int line; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1114 | struct mfc_cache *c, *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1116 | line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1118 | list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[line], list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | if (c->mfc_origin == mfc->mfcc_origin.s_addr && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1120 | c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr && |
| 1121 | (parent == -1 || parent == c->mfc_parent)) { |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1122 | list_del_rcu(&c->list); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 1123 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 1124 | ipmr_cache_free(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | return 0; |
| 1126 | } |
| 1127 | } |
| 1128 | return -ENOENT; |
| 1129 | } |
| 1130 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1131 | static int ipmr_mfc_add(struct net *net, struct mr_table *mrt, |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1132 | struct mfcctl *mfc, int mrtsock, int parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | { |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1134 | bool found = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | int line; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1136 | struct mfc_cache *uc, *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Patrick McHardy | a50436f2 | 2010-03-17 06:04:14 +0000 | [diff] [blame] | 1138 | if (mfc->mfcc_parent >= MAXVIFS) |
| 1139 | return -ENFILE; |
| 1140 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1141 | line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1143 | list_for_each_entry(c, &mrt->mfc_cache_array[line], list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | if (c->mfc_origin == mfc->mfcc_origin.s_addr && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1145 | c->mfc_mcastgrp == mfc->mfcc_mcastgrp.s_addr && |
| 1146 | (parent == -1 || parent == c->mfc_parent)) { |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1147 | found = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | break; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1149 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | } |
| 1151 | |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1152 | if (found) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | write_lock_bh(&mrt_lock); |
| 1154 | c->mfc_parent = mfc->mfcc_parent; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1155 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | if (!mrtsock) |
| 1157 | c->mfc_flags |= MFC_STATIC; |
| 1158 | write_unlock_bh(&mrt_lock); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 1159 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | return 0; |
| 1161 | } |
| 1162 | |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 1163 | if (mfc->mfcc_mcastgrp.s_addr != htonl(INADDR_ANY) && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1164 | !ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | return -EINVAL; |
| 1166 | |
Patrick McHardy | d658f8a | 2010-04-13 05:03:20 +0000 | [diff] [blame] | 1167 | c = ipmr_cache_alloc(); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1168 | if (!c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | return -ENOMEM; |
| 1170 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1171 | c->mfc_origin = mfc->mfcc_origin.s_addr; |
| 1172 | c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr; |
| 1173 | c->mfc_parent = mfc->mfcc_parent; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1174 | ipmr_update_thresholds(mrt, c, mfc->mfcc_ttls); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | if (!mrtsock) |
| 1176 | c->mfc_flags |= MFC_STATIC; |
| 1177 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1178 | list_add_rcu(&c->list, &mrt->mfc_cache_array[line]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
| 1180 | /* |
| 1181 | * Check to see if we resolved a queued list. If so we |
| 1182 | * need to send on the frames and tidy up. |
| 1183 | */ |
Patrick McHardy | b0ebb73 | 2010-04-15 13:29:28 +0200 | [diff] [blame] | 1184 | found = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1186 | list_for_each_entry(uc, &mrt->mfc_unres_queue, list) { |
Patrick McHardy | e258beb | 2010-04-13 05:03:19 +0000 | [diff] [blame] | 1187 | if (uc->mfc_origin == c->mfc_origin && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | uc->mfc_mcastgrp == c->mfc_mcastgrp) { |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1189 | list_del(&uc->list); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1190 | atomic_dec(&mrt->cache_resolve_queue_len); |
Patrick McHardy | b0ebb73 | 2010-04-15 13:29:28 +0200 | [diff] [blame] | 1191 | found = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | break; |
| 1193 | } |
| 1194 | } |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1195 | if (list_empty(&mrt->mfc_unres_queue)) |
| 1196 | del_timer(&mrt->ipmr_expire_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | spin_unlock_bh(&mfc_unres_lock); |
| 1198 | |
Patrick McHardy | b0ebb73 | 2010-04-15 13:29:28 +0200 | [diff] [blame] | 1199 | if (found) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1200 | ipmr_cache_resolve(net, mrt, uc, c); |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 1201 | ipmr_cache_free(uc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 1203 | mroute_netlink_event(mrt, c, RTM_NEWROUTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | return 0; |
| 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * Close the multicast socket, and clear the vif tables etc |
| 1209 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1210 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1211 | static void mroute_clean_tables(struct mr_table *mrt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | { |
| 1213 | int i; |
Eric Dumazet | d17fa6f | 2009-10-28 05:21:38 +0000 | [diff] [blame] | 1214 | LIST_HEAD(list); |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1215 | struct mfc_cache *c, *next; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1216 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1217 | /* Shut down all active vif entries */ |
| 1218 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1219 | for (i = 0; i < mrt->maxvif; i++) { |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1220 | if (!(mrt->vif_table[i].flags & VIFF_STATIC)) |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1221 | vif_delete(mrt, i, 0, &list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | } |
Eric Dumazet | d17fa6f | 2009-10-28 05:21:38 +0000 | [diff] [blame] | 1223 | unregister_netdevice_many(&list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1225 | /* Wipe the cache */ |
| 1226 | |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1227 | for (i = 0; i < MFC_LINES; i++) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1228 | list_for_each_entry_safe(c, next, &mrt->mfc_cache_array[i], list) { |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1229 | if (c->mfc_flags & MFC_STATIC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | continue; |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1231 | list_del_rcu(&c->list); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 1232 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
Benjamin Thery | 5c0a66f | 2009-01-22 04:56:17 +0000 | [diff] [blame] | 1233 | ipmr_cache_free(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | } |
| 1235 | } |
| 1236 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1237 | if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1239 | list_for_each_entry_safe(c, next, &mrt->mfc_unres_queue, list) { |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 1240 | list_del(&c->list); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 1241 | mroute_netlink_event(mrt, c, RTM_DELROUTE); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1242 | ipmr_destroy_unres(mrt, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | } |
| 1244 | spin_unlock_bh(&mfc_unres_lock); |
| 1245 | } |
| 1246 | } |
| 1247 | |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1248 | /* called from ip_ra_control(), before an RCU grace period, |
| 1249 | * we dont need to call synchronize_rcu() here |
| 1250 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | static void mrtsock_destruct(struct sock *sk) |
| 1252 | { |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1253 | struct net *net = sock_net(sk); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1254 | struct mr_table *mrt; |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | rtnl_lock(); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1257 | ipmr_for_each_table(mrt, net) { |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1258 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1259 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)--; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1260 | inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
| 1261 | NETCONFA_IFINDEX_ALL, |
| 1262 | net->ipv4.devconf_all); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1263 | RCU_INIT_POINTER(mrt->mroute_sk, NULL); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1264 | mroute_clean_tables(mrt); |
| 1265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | } |
| 1267 | rtnl_unlock(); |
| 1268 | } |
| 1269 | |
| 1270 | /* |
| 1271 | * Socket options and virtual interface manipulation. The whole |
| 1272 | * virtual interface system is a complete heap, but unfortunately |
| 1273 | * that's how BSD mrouted happens to think. Maybe one day with a proper |
| 1274 | * MOSPF/PIM router set up we can clean this up. |
| 1275 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1276 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1277 | int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1279 | int ret, parent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | struct vifctl vif; |
| 1281 | struct mfcctl mfc; |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1282 | struct net *net = sock_net(sk); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1283 | struct mr_table *mrt; |
| 1284 | |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1285 | if (sk->sk_type != SOCK_RAW || |
| 1286 | inet_sk(sk)->inet_num != IPPROTO_IGMP) |
| 1287 | return -EOPNOTSUPP; |
| 1288 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1289 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1290 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1291 | return -ENOENT; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1292 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1293 | if (optname != MRT_INIT) { |
Eric Dumazet | 33d480c | 2011-08-11 19:30:52 +0000 | [diff] [blame] | 1294 | if (sk != rcu_access_pointer(mrt->mroute_sk) && |
Eric W. Biederman | 52e804c | 2012-11-16 03:03:05 +0000 | [diff] [blame] | 1295 | !ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | return -EACCES; |
| 1297 | } |
| 1298 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1299 | switch (optname) { |
| 1300 | case MRT_INIT: |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1301 | if (optlen != sizeof(int)) |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1302 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1304 | rtnl_lock(); |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1305 | if (rtnl_dereference(mrt->mroute_sk)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | rtnl_unlock(); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1307 | return -EADDRINUSE; |
| 1308 | } |
| 1309 | |
| 1310 | ret = ip_ra_control(sk, 1, mrtsock_destruct); |
| 1311 | if (ret == 0) { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1312 | rcu_assign_pointer(mrt->mroute_sk, sk); |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1313 | IPV4_DEVCONF_ALL(net, MC_FORWARDING)++; |
Nicolas Dichtel | d67b8c6 | 2012-12-04 01:13:35 +0000 | [diff] [blame] | 1314 | inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, |
| 1315 | NETCONFA_IFINDEX_ALL, |
| 1316 | net->ipv4.devconf_all); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1317 | } |
| 1318 | rtnl_unlock(); |
| 1319 | return ret; |
| 1320 | case MRT_DONE: |
Eric Dumazet | 33d480c | 2011-08-11 19:30:52 +0000 | [diff] [blame] | 1321 | if (sk != rcu_access_pointer(mrt->mroute_sk)) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1322 | return -EACCES; |
| 1323 | return ip_ra_control(sk, 0, NULL); |
| 1324 | case MRT_ADD_VIF: |
| 1325 | case MRT_DEL_VIF: |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1326 | if (optlen != sizeof(vif)) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1327 | return -EINVAL; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1328 | if (copy_from_user(&vif, optval, sizeof(vif))) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1329 | return -EFAULT; |
| 1330 | if (vif.vifc_vifi >= MAXVIFS) |
| 1331 | return -ENFILE; |
| 1332 | rtnl_lock(); |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1333 | if (optname == MRT_ADD_VIF) { |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1334 | ret = vif_add(net, mrt, &vif, |
| 1335 | sk == rtnl_dereference(mrt->mroute_sk)); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1336 | } else { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1337 | ret = vif_delete(mrt, vif.vifc_vifi, 0, NULL); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1338 | } |
| 1339 | rtnl_unlock(); |
| 1340 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
| 1342 | /* |
| 1343 | * Manipulate the forwarding caches. These live |
| 1344 | * in a sort of kernel/user symbiosis. |
| 1345 | */ |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1346 | case MRT_ADD_MFC: |
| 1347 | case MRT_DEL_MFC: |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1348 | parent = -1; |
| 1349 | case MRT_ADD_MFC_PROXY: |
| 1350 | case MRT_DEL_MFC_PROXY: |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1351 | if (optlen != sizeof(mfc)) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1352 | return -EINVAL; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1353 | if (copy_from_user(&mfc, optval, sizeof(mfc))) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1354 | return -EFAULT; |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1355 | if (parent == 0) |
| 1356 | parent = mfc.mfcc_parent; |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1357 | rtnl_lock(); |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1358 | if (optname == MRT_DEL_MFC || optname == MRT_DEL_MFC_PROXY) |
| 1359 | ret = ipmr_mfc_delete(mrt, &mfc, parent); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1360 | else |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1361 | ret = ipmr_mfc_add(net, mrt, &mfc, |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1362 | sk == rtnl_dereference(mrt->mroute_sk), |
| 1363 | parent); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1364 | rtnl_unlock(); |
| 1365 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | /* |
| 1367 | * Control PIM assert. |
| 1368 | */ |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1369 | case MRT_ASSERT: |
| 1370 | { |
| 1371 | int v; |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1372 | if (optlen != sizeof(v)) |
| 1373 | return -EINVAL; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1374 | if (get_user(v, (int __user *)optval)) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1375 | return -EFAULT; |
Joe Perches | 53d6841 | 2012-11-25 09:35:30 +0000 | [diff] [blame] | 1376 | mrt->mroute_do_assert = v; |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1377 | return 0; |
| 1378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | #ifdef CONFIG_IP_PIMSM |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1380 | case MRT_PIM: |
| 1381 | { |
Stephen Hemminger | ba93ef7 | 2008-01-21 17:28:59 -0800 | [diff] [blame] | 1382 | int v; |
| 1383 | |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1384 | if (optlen != sizeof(v)) |
| 1385 | return -EINVAL; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1386 | if (get_user(v, (int __user *)optval)) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1387 | return -EFAULT; |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1388 | v = !!v; |
Stephen Hemminger | ba93ef7 | 2008-01-21 17:28:59 -0800 | [diff] [blame] | 1389 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1390 | rtnl_lock(); |
| 1391 | ret = 0; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1392 | if (v != mrt->mroute_do_pim) { |
| 1393 | mrt->mroute_do_pim = v; |
| 1394 | mrt->mroute_do_assert = v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | } |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1396 | rtnl_unlock(); |
| 1397 | return ret; |
| 1398 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | #endif |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1400 | #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES |
| 1401 | case MRT_TABLE: |
| 1402 | { |
| 1403 | u32 v; |
| 1404 | |
| 1405 | if (optlen != sizeof(u32)) |
| 1406 | return -EINVAL; |
| 1407 | if (get_user(v, (u32 __user *)optval)) |
| 1408 | return -EFAULT; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1409 | |
Eric Dumazet | b49d3c1 | 2012-11-25 09:44:29 +0000 | [diff] [blame] | 1410 | /* "pimreg%u" should not exceed 16 bytes (IFNAMSIZ) */ |
| 1411 | if (v != RT_TABLE_DEFAULT && v >= 1000000000) |
| 1412 | return -EINVAL; |
| 1413 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1414 | rtnl_lock(); |
| 1415 | ret = 0; |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1416 | if (sk == rtnl_dereference(mrt->mroute_sk)) { |
| 1417 | ret = -EBUSY; |
| 1418 | } else { |
| 1419 | if (!ipmr_new_table(net, v)) |
| 1420 | ret = -ENOMEM; |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1421 | else |
| 1422 | raw_sk(sk)->ipmr_table = v; |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1423 | } |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1424 | rtnl_unlock(); |
| 1425 | return ret; |
| 1426 | } |
| 1427 | #endif |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1428 | /* |
| 1429 | * Spurious command, or MRT_VERSION which you cannot |
| 1430 | * set. |
| 1431 | */ |
| 1432 | default: |
| 1433 | return -ENOPROTOOPT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | } |
| 1435 | } |
| 1436 | |
| 1437 | /* |
| 1438 | * Getsock opt support for the multicast routing system. |
| 1439 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1440 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1441 | int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | { |
| 1443 | int olr; |
| 1444 | int val; |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1445 | struct net *net = sock_net(sk); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1446 | struct mr_table *mrt; |
| 1447 | |
Eric Dumazet | 5e1859f | 2012-11-25 06:41:45 +0000 | [diff] [blame] | 1448 | if (sk->sk_type != SOCK_RAW || |
| 1449 | inet_sk(sk)->inet_num != IPPROTO_IGMP) |
| 1450 | return -EOPNOTSUPP; |
| 1451 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1452 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1453 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1454 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1456 | if (optname != MRT_VERSION && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | #ifdef CONFIG_IP_PIMSM |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1458 | optname != MRT_PIM && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | #endif |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1460 | optname != MRT_ASSERT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | return -ENOPROTOOPT; |
| 1462 | |
| 1463 | if (get_user(olr, optlen)) |
| 1464 | return -EFAULT; |
| 1465 | |
| 1466 | olr = min_t(unsigned int, olr, sizeof(int)); |
| 1467 | if (olr < 0) |
| 1468 | return -EINVAL; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1469 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1470 | if (put_user(olr, optlen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | return -EFAULT; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1472 | if (optname == MRT_VERSION) |
| 1473 | val = 0x0305; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | #ifdef CONFIG_IP_PIMSM |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1475 | else if (optname == MRT_PIM) |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1476 | val = mrt->mroute_do_pim; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | #endif |
| 1478 | else |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1479 | val = mrt->mroute_do_assert; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1480 | if (copy_to_user(optval, &val, olr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | return -EFAULT; |
| 1482 | return 0; |
| 1483 | } |
| 1484 | |
| 1485 | /* |
| 1486 | * The IP multicast ioctl support routines. |
| 1487 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) |
| 1490 | { |
| 1491 | struct sioc_sg_req sr; |
| 1492 | struct sioc_vif_req vr; |
| 1493 | struct vif_device *vif; |
| 1494 | struct mfc_cache *c; |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1495 | struct net *net = sock_net(sk); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1496 | struct mr_table *mrt; |
| 1497 | |
| 1498 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1499 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1500 | return -ENOENT; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1501 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1502 | switch (cmd) { |
| 1503 | case SIOCGETVIFCNT: |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1504 | if (copy_from_user(&vr, arg, sizeof(vr))) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1505 | return -EFAULT; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1506 | if (vr.vifi >= mrt->maxvif) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1507 | return -EINVAL; |
| 1508 | read_lock(&mrt_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1509 | vif = &mrt->vif_table[vr.vifi]; |
| 1510 | if (VIF_EXISTS(mrt, vr.vifi)) { |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1511 | vr.icount = vif->pkt_in; |
| 1512 | vr.ocount = vif->pkt_out; |
| 1513 | vr.ibytes = vif->bytes_in; |
| 1514 | vr.obytes = vif->bytes_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | read_unlock(&mrt_lock); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1516 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1517 | if (copy_to_user(arg, &vr, sizeof(vr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | return -EFAULT; |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1519 | return 0; |
| 1520 | } |
| 1521 | read_unlock(&mrt_lock); |
| 1522 | return -EADDRNOTAVAIL; |
| 1523 | case SIOCGETSGCNT: |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1524 | if (copy_from_user(&sr, arg, sizeof(sr))) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1525 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1527 | rcu_read_lock(); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1528 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1529 | if (c) { |
| 1530 | sr.pktcnt = c->mfc_un.res.pkt; |
| 1531 | sr.bytecnt = c->mfc_un.res.bytes; |
| 1532 | sr.wrong_if = c->mfc_un.res.wrong_if; |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1533 | rcu_read_unlock(); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1534 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1535 | if (copy_to_user(arg, &sr, sizeof(sr))) |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1536 | return -EFAULT; |
| 1537 | return 0; |
| 1538 | } |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1539 | rcu_read_unlock(); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1540 | return -EADDRNOTAVAIL; |
| 1541 | default: |
| 1542 | return -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | } |
| 1544 | } |
| 1545 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1546 | #ifdef CONFIG_COMPAT |
| 1547 | struct compat_sioc_sg_req { |
| 1548 | struct in_addr src; |
| 1549 | struct in_addr grp; |
| 1550 | compat_ulong_t pktcnt; |
| 1551 | compat_ulong_t bytecnt; |
| 1552 | compat_ulong_t wrong_if; |
| 1553 | }; |
| 1554 | |
David S. Miller | ca6b8bb0 | 2011-02-03 17:24:28 -0800 | [diff] [blame] | 1555 | struct compat_sioc_vif_req { |
| 1556 | vifi_t vifi; /* Which iface */ |
| 1557 | compat_ulong_t icount; |
| 1558 | compat_ulong_t ocount; |
| 1559 | compat_ulong_t ibytes; |
| 1560 | compat_ulong_t obytes; |
| 1561 | }; |
| 1562 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1563 | int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) |
| 1564 | { |
David S. Miller | 0033d5a | 2011-02-03 17:21:31 -0800 | [diff] [blame] | 1565 | struct compat_sioc_sg_req sr; |
David S. Miller | ca6b8bb0 | 2011-02-03 17:24:28 -0800 | [diff] [blame] | 1566 | struct compat_sioc_vif_req vr; |
| 1567 | struct vif_device *vif; |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1568 | struct mfc_cache *c; |
| 1569 | struct net *net = sock_net(sk); |
| 1570 | struct mr_table *mrt; |
| 1571 | |
| 1572 | mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1573 | if (!mrt) |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1574 | return -ENOENT; |
| 1575 | |
| 1576 | switch (cmd) { |
David S. Miller | ca6b8bb0 | 2011-02-03 17:24:28 -0800 | [diff] [blame] | 1577 | case SIOCGETVIFCNT: |
| 1578 | if (copy_from_user(&vr, arg, sizeof(vr))) |
| 1579 | return -EFAULT; |
| 1580 | if (vr.vifi >= mrt->maxvif) |
| 1581 | return -EINVAL; |
| 1582 | read_lock(&mrt_lock); |
| 1583 | vif = &mrt->vif_table[vr.vifi]; |
| 1584 | if (VIF_EXISTS(mrt, vr.vifi)) { |
| 1585 | vr.icount = vif->pkt_in; |
| 1586 | vr.ocount = vif->pkt_out; |
| 1587 | vr.ibytes = vif->bytes_in; |
| 1588 | vr.obytes = vif->bytes_out; |
| 1589 | read_unlock(&mrt_lock); |
| 1590 | |
| 1591 | if (copy_to_user(arg, &vr, sizeof(vr))) |
| 1592 | return -EFAULT; |
| 1593 | return 0; |
| 1594 | } |
| 1595 | read_unlock(&mrt_lock); |
| 1596 | return -EADDRNOTAVAIL; |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1597 | case SIOCGETSGCNT: |
| 1598 | if (copy_from_user(&sr, arg, sizeof(sr))) |
| 1599 | return -EFAULT; |
| 1600 | |
| 1601 | rcu_read_lock(); |
| 1602 | c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr); |
| 1603 | if (c) { |
| 1604 | sr.pktcnt = c->mfc_un.res.pkt; |
| 1605 | sr.bytecnt = c->mfc_un.res.bytes; |
| 1606 | sr.wrong_if = c->mfc_un.res.wrong_if; |
| 1607 | rcu_read_unlock(); |
| 1608 | |
| 1609 | if (copy_to_user(arg, &sr, sizeof(sr))) |
| 1610 | return -EFAULT; |
| 1611 | return 0; |
| 1612 | } |
| 1613 | rcu_read_unlock(); |
| 1614 | return -EADDRNOTAVAIL; |
| 1615 | default: |
| 1616 | return -ENOIOCTLCMD; |
| 1617 | } |
| 1618 | } |
| 1619 | #endif |
| 1620 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | |
| 1622 | static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
| 1623 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 1624 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1625 | struct net *net = dev_net(dev); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1626 | struct mr_table *mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | struct vif_device *v; |
| 1628 | int ct; |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 1629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | if (event != NETDEV_UNREGISTER) |
| 1631 | return NOTIFY_DONE; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1632 | |
| 1633 | ipmr_for_each_table(mrt, net) { |
| 1634 | v = &mrt->vif_table[0]; |
| 1635 | for (ct = 0; ct < mrt->maxvif; ct++, v++) { |
| 1636 | if (v->dev == dev) |
RongQing.Li | e92036a | 2011-11-23 23:10:52 +0000 | [diff] [blame] | 1637 | vif_delete(mrt, ct, 1, NULL); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1638 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | } |
| 1640 | return NOTIFY_DONE; |
| 1641 | } |
| 1642 | |
| 1643 | |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1644 | static struct notifier_block ip_mr_notifier = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | .notifier_call = ipmr_device_event, |
| 1646 | }; |
| 1647 | |
| 1648 | /* |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1649 | * Encapsulate a packet by attaching a valid IPIP header to it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | * This avoids tunnel drivers and other mess and gives us the speed so |
| 1651 | * important for multicast video. |
| 1652 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1653 | |
Hannes Frederic Sowa | b6a7719 | 2015-03-25 17:07:44 +0100 | [diff] [blame] | 1654 | static void ip_encap(struct net *net, struct sk_buff *skb, |
| 1655 | __be32 saddr, __be32 daddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | { |
Arnaldo Carvalho de Melo | 8856dfa | 2007-03-10 19:40:39 -0300 | [diff] [blame] | 1657 | struct iphdr *iph; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1658 | const struct iphdr *old_iph = ip_hdr(skb); |
Arnaldo Carvalho de Melo | 8856dfa | 2007-03-10 19:40:39 -0300 | [diff] [blame] | 1659 | |
| 1660 | skb_push(skb, sizeof(struct iphdr)); |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 1661 | skb->transport_header = skb->network_header; |
Arnaldo Carvalho de Melo | 8856dfa | 2007-03-10 19:40:39 -0300 | [diff] [blame] | 1662 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1663 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1665 | iph->version = 4; |
Arnaldo Carvalho de Melo | e023dd6 | 2007-03-12 20:09:36 -0300 | [diff] [blame] | 1666 | iph->tos = old_iph->tos; |
| 1667 | iph->ttl = old_iph->ttl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | iph->frag_off = 0; |
| 1669 | iph->daddr = daddr; |
| 1670 | iph->saddr = saddr; |
| 1671 | iph->protocol = IPPROTO_IPIP; |
| 1672 | iph->ihl = 5; |
| 1673 | iph->tot_len = htons(skb->len); |
Hannes Frederic Sowa | b6a7719 | 2015-03-25 17:07:44 +0100 | [diff] [blame] | 1674 | ip_select_ident(net, skb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | ip_send_check(iph); |
| 1676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
| 1678 | nf_reset(skb); |
| 1679 | } |
| 1680 | |
Eric W. Biederman | 0c4b51f | 2015-09-15 20:04:18 -0500 | [diff] [blame] | 1681 | static inline int ipmr_forward_finish(struct net *net, struct sock *sk, |
| 1682 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | { |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1684 | struct ip_options *opt = &(IPCB(skb)->opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | |
David S. Miller | 73186df | 2015-11-03 13:41:45 -0500 | [diff] [blame] | 1686 | IP_INC_STATS(net, IPSTATS_MIB_OUTFORWDATAGRAMS); |
| 1687 | IP_ADD_STATS(net, IPSTATS_MIB_OUTOCTETS, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | |
| 1689 | if (unlikely(opt->optlen)) |
| 1690 | ip_forward_options(skb); |
| 1691 | |
Eric W. Biederman | 13206b6 | 2015-10-07 16:48:35 -0500 | [diff] [blame] | 1692 | return dst_output(net, sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * Processing handlers for ipmr_forward |
| 1697 | */ |
| 1698 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1699 | static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt, |
| 1700 | struct sk_buff *skb, struct mfc_cache *c, int vifi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1702 | const struct iphdr *iph = ip_hdr(skb); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1703 | struct vif_device *vif = &mrt->vif_table[vifi]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | struct net_device *dev; |
| 1705 | struct rtable *rt; |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 1706 | struct flowi4 fl4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | int encap = 0; |
| 1708 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 1709 | if (!vif->dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | goto out_free; |
| 1711 | |
| 1712 | #ifdef CONFIG_IP_PIMSM |
| 1713 | if (vif->flags & VIFF_REGISTER) { |
| 1714 | vif->pkt_out++; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1715 | vif->bytes_out += skb->len; |
Pavel Emelyanov | cf3677a | 2008-05-21 14:17:33 -0700 | [diff] [blame] | 1716 | vif->dev->stats.tx_bytes += skb->len; |
| 1717 | vif->dev->stats.tx_packets++; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1718 | ipmr_cache_report(mrt, skb, vifi, IGMPMSG_WHOLEPKT); |
Ilpo Järvinen | 69ebbf5 | 2009-02-06 23:46:51 -0800 | [diff] [blame] | 1719 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | } |
| 1721 | #endif |
| 1722 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1723 | if (vif->flags & VIFF_TUNNEL) { |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 1724 | rt = ip_route_output_ports(net, &fl4, NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 1725 | vif->remote, vif->local, |
| 1726 | 0, 0, |
| 1727 | IPPROTO_IPIP, |
| 1728 | RT_TOS(iph->tos), vif->link); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1729 | if (IS_ERR(rt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | goto out_free; |
| 1731 | encap = sizeof(struct iphdr); |
| 1732 | } else { |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 1733 | rt = ip_route_output_ports(net, &fl4, NULL, iph->daddr, 0, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 1734 | 0, 0, |
| 1735 | IPPROTO_IPIP, |
| 1736 | RT_TOS(iph->tos), vif->link); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1737 | if (IS_ERR(rt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | goto out_free; |
| 1739 | } |
| 1740 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1741 | dev = rt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1743 | if (skb->len+encap > dst_mtu(&rt->dst) && (ntohs(iph->frag_off) & IP_DF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | /* Do not fragment multicasts. Alas, IPv4 does not |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1745 | * allow to send ICMP, so that packets will disappear |
| 1746 | * to blackhole. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | */ |
| 1748 | |
David S. Miller | 73186df | 2015-11-03 13:41:45 -0500 | [diff] [blame] | 1749 | IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | ip_rt_put(rt); |
| 1751 | goto out_free; |
| 1752 | } |
| 1753 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1754 | encap += LL_RESERVED_SPACE(dev) + rt->dst.header_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
| 1756 | if (skb_cow(skb, encap)) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1757 | ip_rt_put(rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | goto out_free; |
| 1759 | } |
| 1760 | |
| 1761 | vif->pkt_out++; |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1762 | vif->bytes_out += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1764 | skb_dst_drop(skb); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1765 | skb_dst_set(skb, &rt->dst); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1766 | ip_decrease_ttl(ip_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | |
| 1768 | /* FIXME: forward and output firewalls used to be called here. |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1769 | * What do we do with netfilter? -- RR |
| 1770 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | if (vif->flags & VIFF_TUNNEL) { |
Hannes Frederic Sowa | b6a7719 | 2015-03-25 17:07:44 +0100 | [diff] [blame] | 1772 | ip_encap(net, skb, vif->local, vif->remote); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | /* FIXME: extra output firewall step used to be here. --RR */ |
Pavel Emelyanov | 2f4c02d | 2008-05-21 14:16:14 -0700 | [diff] [blame] | 1774 | vif->dev->stats.tx_packets++; |
| 1775 | vif->dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | } |
| 1777 | |
| 1778 | IPCB(skb)->flags |= IPSKB_FORWARDED; |
| 1779 | |
| 1780 | /* |
| 1781 | * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally |
| 1782 | * not only before forwarding, but after forwarding on all output |
| 1783 | * interfaces. It is clear, if mrouter runs a multicasting |
| 1784 | * program, it should receive packets not depending to what interface |
| 1785 | * program is joined. |
| 1786 | * If we will not make it, the program will have to join on all |
| 1787 | * interfaces. On the other hand, multihoming host (or router, but |
| 1788 | * not mrouter) cannot join to more than one interface - it will |
| 1789 | * result in receiving multiple packets. |
| 1790 | */ |
Eric W. Biederman | 29a26a5 | 2015-09-15 20:04:16 -0500 | [diff] [blame] | 1791 | NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, |
| 1792 | net, NULL, skb, skb->dev, dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | ipmr_forward_finish); |
| 1794 | return; |
| 1795 | |
| 1796 | out_free: |
| 1797 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | } |
| 1799 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1800 | static int ipmr_find_vif(struct mr_table *mrt, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | { |
| 1802 | int ct; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1803 | |
| 1804 | for (ct = mrt->maxvif-1; ct >= 0; ct--) { |
| 1805 | if (mrt->vif_table[ct].dev == dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | break; |
| 1807 | } |
| 1808 | return ct; |
| 1809 | } |
| 1810 | |
| 1811 | /* "local" means that we should preserve one skb (for local delivery) */ |
| 1812 | |
Rami Rosen | c4854ec | 2013-07-20 15:09:28 +0300 | [diff] [blame] | 1813 | static void ip_mr_forward(struct net *net, struct mr_table *mrt, |
| 1814 | struct sk_buff *skb, struct mfc_cache *cache, |
| 1815 | int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | { |
| 1817 | int psend = -1; |
| 1818 | int vif, ct; |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1819 | int true_vifi = ipmr_find_vif(mrt, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | |
| 1821 | vif = cache->mfc_parent; |
| 1822 | cache->mfc_un.res.pkt++; |
| 1823 | cache->mfc_un.res.bytes += skb->len; |
| 1824 | |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 1825 | if (cache->mfc_origin == htonl(INADDR_ANY) && true_vifi >= 0) { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1826 | struct mfc_cache *cache_proxy; |
| 1827 | |
| 1828 | /* For an (*,G) entry, we only check that the incomming |
| 1829 | * interface is part of the static tree. |
| 1830 | */ |
| 1831 | cache_proxy = ipmr_cache_find_any_parent(mrt, vif); |
| 1832 | if (cache_proxy && |
| 1833 | cache_proxy->mfc_un.res.ttls[true_vifi] < 255) |
| 1834 | goto forward; |
| 1835 | } |
| 1836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | /* |
| 1838 | * Wrong interface: drop packet and (maybe) send PIM assert. |
| 1839 | */ |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1840 | if (mrt->vif_table[vif].dev != skb->dev) { |
David S. Miller | c753796 | 2010-11-11 17:07:48 -0800 | [diff] [blame] | 1841 | if (rt_is_output_route(skb_rtable(skb))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | /* It is our own packet, looped back. |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1843 | * Very complicated situation... |
| 1844 | * |
| 1845 | * The best workaround until routing daemons will be |
| 1846 | * fixed is not to redistribute packet, if it was |
| 1847 | * send through wrong interface. It means, that |
| 1848 | * multicast applications WILL NOT work for |
| 1849 | * (S,G), which have default multicast route pointing |
| 1850 | * to wrong oif. In any case, it is not a good |
| 1851 | * idea to use multicasting applications on router. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | */ |
| 1853 | goto dont_forward; |
| 1854 | } |
| 1855 | |
| 1856 | cache->mfc_un.res.wrong_if++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1858 | if (true_vifi >= 0 && mrt->mroute_do_assert && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | /* pimsm uses asserts, when switching from RPT to SPT, |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1860 | * so that we cannot check that packet arrived on an oif. |
| 1861 | * It is bad, but otherwise we would need to move pretty |
| 1862 | * large chunk of pimd to kernel. Ough... --ANK |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | */ |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1864 | (mrt->mroute_do_pim || |
Benjamin Thery | 6f9374a | 2009-01-22 04:56:20 +0000 | [diff] [blame] | 1865 | cache->mfc_un.res.ttls[true_vifi] < 255) && |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1866 | time_after(jiffies, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { |
| 1868 | cache->mfc_un.res.last_assert = jiffies; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1869 | ipmr_cache_report(mrt, skb, true_vifi, IGMPMSG_WRONGVIF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | } |
| 1871 | goto dont_forward; |
| 1872 | } |
| 1873 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1874 | forward: |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1875 | mrt->vif_table[vif].pkt_in++; |
| 1876 | mrt->vif_table[vif].bytes_in += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | |
| 1878 | /* |
| 1879 | * Forward the frame |
| 1880 | */ |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 1881 | if (cache->mfc_origin == htonl(INADDR_ANY) && |
| 1882 | cache->mfc_mcastgrp == htonl(INADDR_ANY)) { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1883 | if (true_vifi >= 0 && |
| 1884 | true_vifi != cache->mfc_parent && |
| 1885 | ip_hdr(skb)->ttl > |
| 1886 | cache->mfc_un.res.ttls[cache->mfc_parent]) { |
| 1887 | /* It's an (*,*) entry and the packet is not coming from |
| 1888 | * the upstream: forward the packet to the upstream |
| 1889 | * only. |
| 1890 | */ |
| 1891 | psend = cache->mfc_parent; |
| 1892 | goto last_forward; |
| 1893 | } |
| 1894 | goto dont_forward; |
| 1895 | } |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1896 | for (ct = cache->mfc_un.res.maxvif - 1; |
| 1897 | ct >= cache->mfc_un.res.minvif; ct--) { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1898 | /* For (*,G) entry, don't forward to the incoming interface */ |
Nicolas Dichtel | 360eb5d | 2013-01-22 11:18:03 +0100 | [diff] [blame] | 1899 | if ((cache->mfc_origin != htonl(INADDR_ANY) || |
| 1900 | ct != true_vifi) && |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1901 | ip_hdr(skb)->ttl > cache->mfc_un.res.ttls[ct]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | if (psend != -1) { |
| 1903 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | if (skb2) |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1906 | ipmr_queue_xmit(net, mrt, skb2, cache, |
| 1907 | psend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | } |
Jianjun Kong | c354e12 | 2008-11-03 00:28:02 -0800 | [diff] [blame] | 1909 | psend = ct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | } |
| 1911 | } |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 1912 | last_forward: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | if (psend != -1) { |
| 1914 | if (local) { |
| 1915 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1916 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | if (skb2) |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1918 | ipmr_queue_xmit(net, mrt, skb2, cache, psend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | } else { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 1920 | ipmr_queue_xmit(net, mrt, skb, cache, psend); |
Rami Rosen | c4854ec | 2013-07-20 15:09:28 +0300 | [diff] [blame] | 1921 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | } |
| 1923 | } |
| 1924 | |
| 1925 | dont_forward: |
| 1926 | if (!local) |
| 1927 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | } |
| 1929 | |
David S. Miller | 417da66 | 2011-05-03 19:42:43 -0700 | [diff] [blame] | 1930 | static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb) |
David S. Miller | ee3f1aa | 2011-03-09 14:06:20 -0800 | [diff] [blame] | 1931 | { |
David S. Miller | 417da66 | 2011-05-03 19:42:43 -0700 | [diff] [blame] | 1932 | struct rtable *rt = skb_rtable(skb); |
| 1933 | struct iphdr *iph = ip_hdr(skb); |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 1934 | struct flowi4 fl4 = { |
David S. Miller | 417da66 | 2011-05-03 19:42:43 -0700 | [diff] [blame] | 1935 | .daddr = iph->daddr, |
| 1936 | .saddr = iph->saddr, |
Julian Anastasov | b0fe4a3 | 2011-07-23 02:00:41 +0000 | [diff] [blame] | 1937 | .flowi4_tos = RT_TOS(iph->tos), |
David S. Miller | 4fd551d | 2012-07-17 14:39:44 -0700 | [diff] [blame] | 1938 | .flowi4_oif = (rt_is_output_route(rt) ? |
| 1939 | skb->dev->ifindex : 0), |
| 1940 | .flowi4_iif = (rt_is_output_route(rt) ? |
Pavel Emelyanov | 1fb9489 | 2012-08-08 21:53:36 +0000 | [diff] [blame] | 1941 | LOOPBACK_IFINDEX : |
David S. Miller | 4fd551d | 2012-07-17 14:39:44 -0700 | [diff] [blame] | 1942 | skb->dev->ifindex), |
David Miller | b486988 | 2012-07-01 02:03:01 +0000 | [diff] [blame] | 1943 | .flowi4_mark = skb->mark, |
David S. Miller | ee3f1aa | 2011-03-09 14:06:20 -0800 | [diff] [blame] | 1944 | }; |
| 1945 | struct mr_table *mrt; |
| 1946 | int err; |
| 1947 | |
David S. Miller | da91981 | 2011-03-12 02:04:50 -0500 | [diff] [blame] | 1948 | err = ipmr_fib_lookup(net, &fl4, &mrt); |
David S. Miller | ee3f1aa | 2011-03-09 14:06:20 -0800 | [diff] [blame] | 1949 | if (err) |
| 1950 | return ERR_PTR(err); |
| 1951 | return mrt; |
| 1952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | |
| 1954 | /* |
| 1955 | * Multicast packets for forwarding arrive here |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1956 | * Called with rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | */ |
| 1958 | |
| 1959 | int ip_mr_input(struct sk_buff *skb) |
| 1960 | { |
| 1961 | struct mfc_cache *cache; |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 1962 | struct net *net = dev_net(skb->dev); |
Eric Dumazet | 511c3f9 | 2009-06-02 05:14:27 +0000 | [diff] [blame] | 1963 | int local = skb_rtable(skb)->rt_flags & RTCF_LOCAL; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 1964 | struct mr_table *mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | |
| 1966 | /* Packet is looped back after forward, it should not be |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 1967 | * forwarded second time, but still can be delivered locally. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | */ |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1969 | if (IPCB(skb)->flags & IPSKB_FORWARDED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | goto dont_forward; |
| 1971 | |
David S. Miller | 417da66 | 2011-05-03 19:42:43 -0700 | [diff] [blame] | 1972 | mrt = ipmr_rt_fib_lookup(net, skb); |
David S. Miller | ee3f1aa | 2011-03-09 14:06:20 -0800 | [diff] [blame] | 1973 | if (IS_ERR(mrt)) { |
| 1974 | kfree_skb(skb); |
| 1975 | return PTR_ERR(mrt); |
Ben Greear | e40dbc5 | 2010-07-15 13:22:33 +0000 | [diff] [blame] | 1976 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | if (!local) { |
Eric Dumazet | 4c96870 | 2010-10-01 16:15:01 +0000 | [diff] [blame] | 1978 | if (IPCB(skb)->opt.router_alert) { |
| 1979 | if (ip_call_ra_chain(skb)) |
| 1980 | return 0; |
| 1981 | } else if (ip_hdr(skb)->protocol == IPPROTO_IGMP) { |
| 1982 | /* IGMPv1 (and broken IGMPv2 implementations sort of |
| 1983 | * Cisco IOS <= 11.2(8)) do not put router alert |
| 1984 | * option to IGMP packets destined to routable |
| 1985 | * groups. It is very bad, because it means |
| 1986 | * that we can forward NO IGMP messages. |
| 1987 | */ |
| 1988 | struct sock *mroute_sk; |
| 1989 | |
| 1990 | mroute_sk = rcu_dereference(mrt->mroute_sk); |
| 1991 | if (mroute_sk) { |
| 1992 | nf_reset(skb); |
| 1993 | raw_rcv(mroute_sk, skb); |
| 1994 | return 0; |
| 1995 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | } |
| 1997 | } |
| 1998 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 1999 | /* already under rcu_read_lock() */ |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2000 | cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2001 | if (!cache) { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2002 | int vif = ipmr_find_vif(mrt, skb->dev); |
| 2003 | |
| 2004 | if (vif >= 0) |
| 2005 | cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr, |
| 2006 | vif); |
| 2007 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | |
| 2009 | /* |
| 2010 | * No usable cache entry |
| 2011 | */ |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2012 | if (!cache) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | int vif; |
| 2014 | |
| 2015 | if (local) { |
| 2016 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
| 2017 | ip_local_deliver(skb); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2018 | if (!skb2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | skb = skb2; |
| 2021 | } |
| 2022 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2023 | read_lock(&mrt_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2024 | vif = ipmr_find_vif(mrt, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | if (vif >= 0) { |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 2026 | int err2 = ipmr_cache_unresolved(mrt, vif, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | read_unlock(&mrt_lock); |
| 2028 | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 2029 | return err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | } |
| 2031 | read_unlock(&mrt_lock); |
| 2032 | kfree_skb(skb); |
| 2033 | return -ENODEV; |
| 2034 | } |
| 2035 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2036 | read_lock(&mrt_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2037 | ip_mr_forward(net, mrt, skb, cache, local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | read_unlock(&mrt_lock); |
| 2039 | |
| 2040 | if (local) |
| 2041 | return ip_local_deliver(skb); |
| 2042 | |
| 2043 | return 0; |
| 2044 | |
| 2045 | dont_forward: |
| 2046 | if (local) |
| 2047 | return ip_local_deliver(skb); |
| 2048 | kfree_skb(skb); |
| 2049 | return 0; |
| 2050 | } |
| 2051 | |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2052 | #ifdef CONFIG_IP_PIMSM |
Eric Dumazet | 55747a0 | 2010-10-01 16:14:55 +0000 | [diff] [blame] | 2053 | /* called with rcu_read_lock() */ |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2054 | static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb, |
| 2055 | unsigned int pimlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | { |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2057 | struct net_device *reg_dev = NULL; |
| 2058 | struct iphdr *encap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2060 | encap = (struct iphdr *)(skb_transport_header(skb) + pimlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | /* |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2062 | * Check that: |
| 2063 | * a. packet is really sent to a multicast group |
| 2064 | * b. packet is not a NULL-REGISTER |
| 2065 | * c. packet is not truncated |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | */ |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 2067 | if (!ipv4_is_multicast(encap->daddr) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2068 | encap->tot_len == 0 || |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2069 | ntohs(encap->tot_len) + pimlen > skb->len) |
| 2070 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | |
| 2072 | read_lock(&mrt_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2073 | if (mrt->mroute_reg_vif_num >= 0) |
| 2074 | reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | read_unlock(&mrt_lock); |
| 2076 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2077 | if (!reg_dev) |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2078 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 2080 | skb->mac_header = skb->network_header; |
Eric Dumazet | 55747a0 | 2010-10-01 16:14:55 +0000 | [diff] [blame] | 2081 | skb_pull(skb, (u8 *)encap - skb->data); |
Arnaldo Carvalho de Melo | 31c7711 | 2007-03-10 19:04:55 -0300 | [diff] [blame] | 2082 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | skb->protocol = htons(ETH_P_IP); |
Eric Dumazet | 55747a0 | 2010-10-01 16:14:55 +0000 | [diff] [blame] | 2084 | skb->ip_summed = CHECKSUM_NONE; |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 2085 | |
Nicolas Dichtel | ea23192 | 2013-09-02 15:34:58 +0200 | [diff] [blame] | 2086 | skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 2087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | netif_rx(skb); |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2089 | |
Eric Dumazet | 55747a0 | 2010-10-01 16:14:55 +0000 | [diff] [blame] | 2090 | return NET_RX_SUCCESS; |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2091 | } |
| 2092 | #endif |
| 2093 | |
| 2094 | #ifdef CONFIG_IP_PIMSM_V1 |
| 2095 | /* |
| 2096 | * Handle IGMP messages of PIMv1 |
| 2097 | */ |
| 2098 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2099 | int pim_rcv_v1(struct sk_buff *skb) |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2100 | { |
| 2101 | struct igmphdr *pim; |
Benjamin Thery | 4feb88e | 2009-01-22 04:56:23 +0000 | [diff] [blame] | 2102 | struct net *net = dev_net(skb->dev); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2103 | struct mr_table *mrt; |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2104 | |
| 2105 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) |
| 2106 | goto drop; |
| 2107 | |
| 2108 | pim = igmp_hdr(skb); |
| 2109 | |
David S. Miller | 417da66 | 2011-05-03 19:42:43 -0700 | [diff] [blame] | 2110 | mrt = ipmr_rt_fib_lookup(net, skb); |
David S. Miller | ee3f1aa | 2011-03-09 14:06:20 -0800 | [diff] [blame] | 2111 | if (IS_ERR(mrt)) |
| 2112 | goto drop; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2113 | if (!mrt->mroute_do_pim || |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2114 | pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER) |
| 2115 | goto drop; |
| 2116 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2117 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2118 | drop: |
| 2119 | kfree_skb(skb); |
| 2120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | return 0; |
| 2122 | } |
| 2123 | #endif |
| 2124 | |
| 2125 | #ifdef CONFIG_IP_PIMSM_V2 |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2126 | static int pim_rcv(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | { |
| 2128 | struct pimreghdr *pim; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2129 | struct net *net = dev_net(skb->dev); |
| 2130 | struct mr_table *mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2132 | if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | goto drop; |
| 2134 | |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 2135 | pim = (struct pimreghdr *)skb_transport_header(skb); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2136 | if (pim->type != ((PIM_VERSION << 4) | (PIM_REGISTER)) || |
| 2137 | (pim->flags & PIM_NULL_REGISTER) || |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2138 | (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && |
Al Viro | d3bc23e | 2006-11-14 21:24:49 -0800 | [diff] [blame] | 2139 | csum_fold(skb_checksum(skb, 0, skb->len, 0)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | goto drop; |
| 2141 | |
David S. Miller | 417da66 | 2011-05-03 19:42:43 -0700 | [diff] [blame] | 2142 | mrt = ipmr_rt_fib_lookup(net, skb); |
David S. Miller | ee3f1aa | 2011-03-09 14:06:20 -0800 | [diff] [blame] | 2143 | if (IS_ERR(mrt)) |
| 2144 | goto drop; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2145 | if (__pim_rcv(mrt, skb, sizeof(*pim))) { |
Ilpo Järvinen | b187920 | 2008-12-16 01:15:11 -0800 | [diff] [blame] | 2146 | drop: |
| 2147 | kfree_skb(skb); |
| 2148 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | return 0; |
| 2150 | } |
| 2151 | #endif |
| 2152 | |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2153 | static int __ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
| 2154 | struct mfc_cache *c, struct rtmsg *rtm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | { |
| 2156 | int ct; |
| 2157 | struct rtnexthop *nhp; |
Thomas Graf | 92a395e | 2012-06-26 23:36:13 +0000 | [diff] [blame] | 2158 | struct nlattr *mp_attr; |
Nicolas Dichtel | adfa85e | 2012-12-04 01:13:37 +0000 | [diff] [blame] | 2159 | struct rta_mfc_stats mfcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | |
Nicolas Dichtel | 7438189 | 2010-03-25 23:45:35 +0000 | [diff] [blame] | 2161 | /* If cache is unresolved, don't try to parse IIF and OIF */ |
Dan Carpenter | ed0f160a | 2010-05-26 00:38:56 -0700 | [diff] [blame] | 2162 | if (c->mfc_parent >= MAXVIFS) |
Nicolas Dichtel | 7438189 | 2010-03-25 23:45:35 +0000 | [diff] [blame] | 2163 | return -ENOENT; |
| 2164 | |
Thomas Graf | 92a395e | 2012-06-26 23:36:13 +0000 | [diff] [blame] | 2165 | if (VIF_EXISTS(mrt, c->mfc_parent) && |
| 2166 | nla_put_u32(skb, RTA_IIF, mrt->vif_table[c->mfc_parent].dev->ifindex) < 0) |
| 2167 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | |
Thomas Graf | 92a395e | 2012-06-26 23:36:13 +0000 | [diff] [blame] | 2169 | if (!(mp_attr = nla_nest_start(skb, RTA_MULTIPATH))) |
| 2170 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | |
| 2172 | for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2173 | if (VIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { |
Thomas Graf | 92a395e | 2012-06-26 23:36:13 +0000 | [diff] [blame] | 2174 | if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp)))) { |
| 2175 | nla_nest_cancel(skb, mp_attr); |
| 2176 | return -EMSGSIZE; |
| 2177 | } |
| 2178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | nhp->rtnh_flags = 0; |
| 2180 | nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2181 | nhp->rtnh_ifindex = mrt->vif_table[ct].dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | nhp->rtnh_len = sizeof(*nhp); |
| 2183 | } |
| 2184 | } |
Thomas Graf | 92a395e | 2012-06-26 23:36:13 +0000 | [diff] [blame] | 2185 | |
| 2186 | nla_nest_end(skb, mp_attr); |
| 2187 | |
Nicolas Dichtel | adfa85e | 2012-12-04 01:13:37 +0000 | [diff] [blame] | 2188 | mfcs.mfcs_packets = c->mfc_un.res.pkt; |
| 2189 | mfcs.mfcs_bytes = c->mfc_un.res.bytes; |
| 2190 | mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; |
| 2191 | if (nla_put(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs) < 0) |
| 2192 | return -EMSGSIZE; |
| 2193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | rtm->rtm_type = RTN_MULTICAST; |
| 2195 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | } |
| 2197 | |
David S. Miller | 9a1b949 | 2011-05-04 12:18:54 -0700 | [diff] [blame] | 2198 | int ipmr_get_route(struct net *net, struct sk_buff *skb, |
| 2199 | __be32 saddr, __be32 daddr, |
| 2200 | struct rtmsg *rtm, int nowait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | struct mfc_cache *cache; |
David S. Miller | 9a1b949 | 2011-05-04 12:18:54 -0700 | [diff] [blame] | 2203 | struct mr_table *mrt; |
| 2204 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2206 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2207 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2208 | return -ENOENT; |
| 2209 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2210 | rcu_read_lock(); |
David S. Miller | 9a1b949 | 2011-05-04 12:18:54 -0700 | [diff] [blame] | 2211 | cache = ipmr_cache_find(mrt, saddr, daddr); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2212 | if (!cache && skb->dev) { |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2213 | int vif = ipmr_find_vif(mrt, skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | |
Nicolas Dichtel | 660b26d | 2013-01-21 06:00:26 +0000 | [diff] [blame] | 2215 | if (vif >= 0) |
| 2216 | cache = ipmr_cache_find_any(mrt, daddr, vif); |
| 2217 | } |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2218 | if (!cache) { |
Alexey Kuznetsov | 7228749 | 2006-07-25 16:45:12 -0700 | [diff] [blame] | 2219 | struct sk_buff *skb2; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 2220 | struct iphdr *iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | struct net_device *dev; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2222 | int vif = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | |
| 2224 | if (nowait) { |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2225 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | return -EAGAIN; |
| 2227 | } |
| 2228 | |
| 2229 | dev = skb->dev; |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2230 | read_lock(&mrt_lock); |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2231 | if (dev) |
| 2232 | vif = ipmr_find_vif(mrt, dev); |
| 2233 | if (vif < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | read_unlock(&mrt_lock); |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2235 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | return -ENODEV; |
| 2237 | } |
Alexey Kuznetsov | 7228749 | 2006-07-25 16:45:12 -0700 | [diff] [blame] | 2238 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 2239 | if (!skb2) { |
| 2240 | read_unlock(&mrt_lock); |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2241 | rcu_read_unlock(); |
Alexey Kuznetsov | 7228749 | 2006-07-25 16:45:12 -0700 | [diff] [blame] | 2242 | return -ENOMEM; |
| 2243 | } |
| 2244 | |
Arnaldo Carvalho de Melo | e2d1bca | 2007-04-10 20:46:21 -0700 | [diff] [blame] | 2245 | skb_push(skb2, sizeof(struct iphdr)); |
| 2246 | skb_reset_network_header(skb2); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 2247 | iph = ip_hdr(skb2); |
| 2248 | iph->ihl = sizeof(struct iphdr) >> 2; |
David S. Miller | 9a1b949 | 2011-05-04 12:18:54 -0700 | [diff] [blame] | 2249 | iph->saddr = saddr; |
| 2250 | iph->daddr = daddr; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 2251 | iph->version = 0; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2252 | err = ipmr_cache_unresolved(mrt, vif, skb2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | read_unlock(&mrt_lock); |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2254 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | return err; |
| 2256 | } |
| 2257 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2258 | read_lock(&mrt_lock); |
| 2259 | if (!nowait && (rtm->rtm_flags & RTM_F_NOTIFY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | cache->mfc_flags |= MFC_NOTIFY; |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2261 | err = __ipmr_fill_mroute(mrt, skb, cache, rtm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | read_unlock(&mrt_lock); |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2263 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | return err; |
| 2265 | } |
| 2266 | |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2267 | static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, |
Nicolas Dichtel | 65886f4 | 2014-03-19 17:47:50 +0100 | [diff] [blame] | 2268 | u32 portid, u32 seq, struct mfc_cache *c, int cmd, |
| 2269 | int flags) |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2270 | { |
| 2271 | struct nlmsghdr *nlh; |
| 2272 | struct rtmsg *rtm; |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2273 | int err; |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2274 | |
Nicolas Dichtel | 65886f4 | 2014-03-19 17:47:50 +0100 | [diff] [blame] | 2275 | nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2276 | if (!nlh) |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2277 | return -EMSGSIZE; |
| 2278 | |
| 2279 | rtm = nlmsg_data(nlh); |
| 2280 | rtm->rtm_family = RTNL_FAMILY_IPMR; |
| 2281 | rtm->rtm_dst_len = 32; |
| 2282 | rtm->rtm_src_len = 32; |
| 2283 | rtm->rtm_tos = 0; |
| 2284 | rtm->rtm_table = mrt->id; |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 2285 | if (nla_put_u32(skb, RTA_TABLE, mrt->id)) |
| 2286 | goto nla_put_failure; |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2287 | rtm->rtm_type = RTN_MULTICAST; |
| 2288 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; |
Nicolas Dichtel | 9a68ac7 | 2012-12-04 01:13:38 +0000 | [diff] [blame] | 2289 | if (c->mfc_flags & MFC_STATIC) |
| 2290 | rtm->rtm_protocol = RTPROT_STATIC; |
| 2291 | else |
| 2292 | rtm->rtm_protocol = RTPROT_MROUTED; |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2293 | rtm->rtm_flags = 0; |
| 2294 | |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 2295 | if (nla_put_in_addr(skb, RTA_SRC, c->mfc_origin) || |
| 2296 | nla_put_in_addr(skb, RTA_DST, c->mfc_mcastgrp)) |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 2297 | goto nla_put_failure; |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2298 | err = __ipmr_fill_mroute(mrt, skb, c, rtm); |
| 2299 | /* do not break the dump if cache is unresolved */ |
| 2300 | if (err < 0 && err != -ENOENT) |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2301 | goto nla_put_failure; |
| 2302 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 2303 | nlmsg_end(skb, nlh); |
| 2304 | return 0; |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2305 | |
| 2306 | nla_put_failure: |
| 2307 | nlmsg_cancel(skb, nlh); |
| 2308 | return -EMSGSIZE; |
| 2309 | } |
| 2310 | |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 2311 | static size_t mroute_msgsize(bool unresolved, int maxvif) |
| 2312 | { |
| 2313 | size_t len = |
| 2314 | NLMSG_ALIGN(sizeof(struct rtmsg)) |
| 2315 | + nla_total_size(4) /* RTA_TABLE */ |
| 2316 | + nla_total_size(4) /* RTA_SRC */ |
| 2317 | + nla_total_size(4) /* RTA_DST */ |
| 2318 | ; |
| 2319 | |
| 2320 | if (!unresolved) |
| 2321 | len = len |
| 2322 | + nla_total_size(4) /* RTA_IIF */ |
| 2323 | + nla_total_size(0) /* RTA_MULTIPATH */ |
| 2324 | + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) |
| 2325 | /* RTA_MFC_STATS */ |
| 2326 | + nla_total_size(sizeof(struct rta_mfc_stats)) |
| 2327 | ; |
| 2328 | |
| 2329 | return len; |
| 2330 | } |
| 2331 | |
| 2332 | static void mroute_netlink_event(struct mr_table *mrt, struct mfc_cache *mfc, |
| 2333 | int cmd) |
| 2334 | { |
| 2335 | struct net *net = read_pnet(&mrt->net); |
| 2336 | struct sk_buff *skb; |
| 2337 | int err = -ENOBUFS; |
| 2338 | |
| 2339 | skb = nlmsg_new(mroute_msgsize(mfc->mfc_parent >= MAXVIFS, mrt->maxvif), |
| 2340 | GFP_ATOMIC); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2341 | if (!skb) |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 2342 | goto errout; |
| 2343 | |
Nicolas Dichtel | 65886f4 | 2014-03-19 17:47:50 +0100 | [diff] [blame] | 2344 | err = ipmr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); |
Nicolas Dichtel | 8cd3ac9 | 2012-12-04 01:13:40 +0000 | [diff] [blame] | 2345 | if (err < 0) |
| 2346 | goto errout; |
| 2347 | |
| 2348 | rtnl_notify(skb, net, 0, RTNLGRP_IPV4_MROUTE, NULL, GFP_ATOMIC); |
| 2349 | return; |
| 2350 | |
| 2351 | errout: |
| 2352 | kfree_skb(skb); |
| 2353 | if (err < 0) |
| 2354 | rtnl_set_sk_err(net, RTNLGRP_IPV4_MROUTE, err); |
| 2355 | } |
| 2356 | |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2357 | static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) |
| 2358 | { |
| 2359 | struct net *net = sock_net(skb->sk); |
| 2360 | struct mr_table *mrt; |
| 2361 | struct mfc_cache *mfc; |
| 2362 | unsigned int t = 0, s_t; |
| 2363 | unsigned int h = 0, s_h; |
| 2364 | unsigned int e = 0, s_e; |
| 2365 | |
| 2366 | s_t = cb->args[0]; |
| 2367 | s_h = cb->args[1]; |
| 2368 | s_e = cb->args[2]; |
| 2369 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2370 | rcu_read_lock(); |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2371 | ipmr_for_each_table(mrt, net) { |
| 2372 | if (t < s_t) |
| 2373 | goto next_table; |
| 2374 | if (t > s_t) |
| 2375 | s_h = 0; |
| 2376 | for (h = s_h; h < MFC_LINES; h++) { |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2377 | list_for_each_entry_rcu(mfc, &mrt->mfc_cache_array[h], list) { |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2378 | if (e < s_e) |
| 2379 | goto next_entry; |
| 2380 | if (ipmr_fill_mroute(mrt, skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2381 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2382 | cb->nlh->nlmsg_seq, |
Nicolas Dichtel | 65886f4 | 2014-03-19 17:47:50 +0100 | [diff] [blame] | 2383 | mfc, RTM_NEWROUTE, |
| 2384 | NLM_F_MULTI) < 0) |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2385 | goto done; |
| 2386 | next_entry: |
| 2387 | e++; |
| 2388 | } |
| 2389 | e = s_e = 0; |
| 2390 | } |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2391 | spin_lock_bh(&mfc_unres_lock); |
| 2392 | list_for_each_entry(mfc, &mrt->mfc_unres_queue, list) { |
| 2393 | if (e < s_e) |
| 2394 | goto next_entry2; |
| 2395 | if (ipmr_fill_mroute(mrt, skb, |
| 2396 | NETLINK_CB(cb->skb).portid, |
| 2397 | cb->nlh->nlmsg_seq, |
Nicolas Dichtel | 65886f4 | 2014-03-19 17:47:50 +0100 | [diff] [blame] | 2398 | mfc, RTM_NEWROUTE, |
| 2399 | NLM_F_MULTI) < 0) { |
Nicolas Dichtel | 1eb99af | 2012-12-04 01:13:39 +0000 | [diff] [blame] | 2400 | spin_unlock_bh(&mfc_unres_lock); |
| 2401 | goto done; |
| 2402 | } |
| 2403 | next_entry2: |
| 2404 | e++; |
| 2405 | } |
| 2406 | spin_unlock_bh(&mfc_unres_lock); |
| 2407 | e = s_e = 0; |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2408 | s_h = 0; |
| 2409 | next_table: |
| 2410 | t++; |
| 2411 | } |
| 2412 | done: |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2413 | rcu_read_unlock(); |
Patrick McHardy | cb6a4e4 | 2010-04-26 16:02:08 +0200 | [diff] [blame] | 2414 | |
| 2415 | cb->args[2] = e; |
| 2416 | cb->args[1] = h; |
| 2417 | cb->args[0] = t; |
| 2418 | |
| 2419 | return skb->len; |
| 2420 | } |
| 2421 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2422 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2423 | /* |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2424 | * The /proc interfaces to multicast routing : |
| 2425 | * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | */ |
| 2427 | struct ipmr_vif_iter { |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2428 | struct seq_net_private p; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2429 | struct mr_table *mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | int ct; |
| 2431 | }; |
| 2432 | |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2433 | static struct vif_device *ipmr_vif_seq_idx(struct net *net, |
| 2434 | struct ipmr_vif_iter *iter, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | loff_t pos) |
| 2436 | { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2437 | struct mr_table *mrt = iter->mrt; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2438 | |
| 2439 | for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { |
| 2440 | if (!VIF_EXISTS(mrt, iter->ct)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | continue; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2442 | if (pos-- == 0) |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2443 | return &mrt->vif_table[iter->ct]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | } |
| 2445 | return NULL; |
| 2446 | } |
| 2447 | |
| 2448 | static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos) |
Stephen Hemminger | ba93ef7 | 2008-01-21 17:28:59 -0800 | [diff] [blame] | 2449 | __acquires(mrt_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2450 | { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2451 | struct ipmr_vif_iter *iter = seq->private; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2452 | struct net *net = seq_file_net(seq); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2453 | struct mr_table *mrt; |
| 2454 | |
| 2455 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2456 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2457 | return ERR_PTR(-ENOENT); |
| 2458 | |
| 2459 | iter->mrt = mrt; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | read_lock(&mrt_lock); |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2462 | return *pos ? ipmr_vif_seq_idx(net, seq->private, *pos - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | : SEQ_START_TOKEN; |
| 2464 | } |
| 2465 | |
| 2466 | static void *ipmr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2467 | { |
| 2468 | struct ipmr_vif_iter *iter = seq->private; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2469 | struct net *net = seq_file_net(seq); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2470 | struct mr_table *mrt = iter->mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | |
| 2472 | ++*pos; |
| 2473 | if (v == SEQ_START_TOKEN) |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2474 | return ipmr_vif_seq_idx(net, iter, 0); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2475 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2476 | while (++iter->ct < mrt->maxvif) { |
| 2477 | if (!VIF_EXISTS(mrt, iter->ct)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | continue; |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2479 | return &mrt->vif_table[iter->ct]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | } |
| 2481 | return NULL; |
| 2482 | } |
| 2483 | |
| 2484 | static void ipmr_vif_seq_stop(struct seq_file *seq, void *v) |
Stephen Hemminger | ba93ef7 | 2008-01-21 17:28:59 -0800 | [diff] [blame] | 2485 | __releases(mrt_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2486 | { |
| 2487 | read_unlock(&mrt_lock); |
| 2488 | } |
| 2489 | |
| 2490 | static int ipmr_vif_seq_show(struct seq_file *seq, void *v) |
| 2491 | { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2492 | struct ipmr_vif_iter *iter = seq->private; |
| 2493 | struct mr_table *mrt = iter->mrt; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | if (v == SEQ_START_TOKEN) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2496 | seq_puts(seq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | "Interface BytesIn PktsIn BytesOut PktsOut Flags Local Remote\n"); |
| 2498 | } else { |
| 2499 | const struct vif_device *vif = v; |
| 2500 | const char *name = vif->dev ? vif->dev->name : "none"; |
| 2501 | |
| 2502 | seq_printf(seq, |
| 2503 | "%2Zd %-10s %8ld %7ld %8ld %7ld %05X %08X %08X\n", |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2504 | vif - mrt->vif_table, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2505 | name, vif->bytes_in, vif->pkt_in, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2506 | vif->bytes_out, vif->pkt_out, |
| 2507 | vif->flags, vif->local, vif->remote); |
| 2508 | } |
| 2509 | return 0; |
| 2510 | } |
| 2511 | |
Stephen Hemminger | f690808 | 2007-03-12 14:34:29 -0700 | [diff] [blame] | 2512 | static const struct seq_operations ipmr_vif_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | .start = ipmr_vif_seq_start, |
| 2514 | .next = ipmr_vif_seq_next, |
| 2515 | .stop = ipmr_vif_seq_stop, |
| 2516 | .show = ipmr_vif_seq_show, |
| 2517 | }; |
| 2518 | |
| 2519 | static int ipmr_vif_open(struct inode *inode, struct file *file) |
| 2520 | { |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2521 | return seq_open_net(inode, file, &ipmr_vif_seq_ops, |
| 2522 | sizeof(struct ipmr_vif_iter)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | } |
| 2524 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2525 | static const struct file_operations ipmr_vif_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | .owner = THIS_MODULE, |
| 2527 | .open = ipmr_vif_open, |
| 2528 | .read = seq_read, |
| 2529 | .llseek = seq_lseek, |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2530 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | }; |
| 2532 | |
| 2533 | struct ipmr_mfc_iter { |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2534 | struct seq_net_private p; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2535 | struct mr_table *mrt; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2536 | struct list_head *cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | int ct; |
| 2538 | }; |
| 2539 | |
| 2540 | |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2541 | static struct mfc_cache *ipmr_mfc_seq_idx(struct net *net, |
| 2542 | struct ipmr_mfc_iter *it, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2544 | struct mr_table *mrt = it->mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | struct mfc_cache *mfc; |
| 2546 | |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2547 | rcu_read_lock(); |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2548 | for (it->ct = 0; it->ct < MFC_LINES; it->ct++) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2549 | it->cache = &mrt->mfc_cache_array[it->ct]; |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2550 | list_for_each_entry_rcu(mfc, it->cache, list) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2551 | if (pos-- == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | return mfc; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2553 | } |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2554 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2557 | it->cache = &mrt->mfc_unres_queue; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2558 | list_for_each_entry(mfc, it->cache, list) |
Patrick McHardy | e258beb | 2010-04-13 05:03:19 +0000 | [diff] [blame] | 2559 | if (pos-- == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | return mfc; |
| 2561 | spin_unlock_bh(&mfc_unres_lock); |
| 2562 | |
| 2563 | it->cache = NULL; |
| 2564 | return NULL; |
| 2565 | } |
| 2566 | |
| 2567 | |
| 2568 | static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) |
| 2569 | { |
| 2570 | struct ipmr_mfc_iter *it = seq->private; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2571 | struct net *net = seq_file_net(seq); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2572 | struct mr_table *mrt; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2573 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2574 | mrt = ipmr_get_table(net, RT_TABLE_DEFAULT); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 2575 | if (!mrt) |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2576 | return ERR_PTR(-ENOENT); |
| 2577 | |
| 2578 | it->mrt = mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | it->cache = NULL; |
| 2580 | it->ct = 0; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2581 | return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | : SEQ_START_TOKEN; |
| 2583 | } |
| 2584 | |
| 2585 | static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2586 | { |
| 2587 | struct mfc_cache *mfc = v; |
| 2588 | struct ipmr_mfc_iter *it = seq->private; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2589 | struct net *net = seq_file_net(seq); |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2590 | struct mr_table *mrt = it->mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | |
| 2592 | ++*pos; |
| 2593 | |
| 2594 | if (v == SEQ_START_TOKEN) |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2595 | return ipmr_mfc_seq_idx(net, seq->private, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2597 | if (mfc->list.next != it->cache) |
| 2598 | return list_entry(mfc->list.next, struct mfc_cache, list); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2599 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2600 | if (it->cache == &mrt->mfc_unres_queue) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | goto end_of_list; |
| 2602 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2603 | BUG_ON(it->cache != &mrt->mfc_cache_array[it->ct]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | |
| 2605 | while (++it->ct < MFC_LINES) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2606 | it->cache = &mrt->mfc_cache_array[it->ct]; |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2607 | if (list_empty(it->cache)) |
| 2608 | continue; |
| 2609 | return list_first_entry(it->cache, struct mfc_cache, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | } |
| 2611 | |
| 2612 | /* exhausted cache_array, show unresolved */ |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2613 | rcu_read_unlock(); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2614 | it->cache = &mrt->mfc_unres_queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | it->ct = 0; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | spin_lock_bh(&mfc_unres_lock); |
Patrick McHardy | 862465f | 2010-04-13 05:03:21 +0000 | [diff] [blame] | 2618 | if (!list_empty(it->cache)) |
| 2619 | return list_first_entry(it->cache, struct mfc_cache, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2621 | end_of_list: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | spin_unlock_bh(&mfc_unres_lock); |
| 2623 | it->cache = NULL; |
| 2624 | |
| 2625 | return NULL; |
| 2626 | } |
| 2627 | |
| 2628 | static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) |
| 2629 | { |
| 2630 | struct ipmr_mfc_iter *it = seq->private; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2631 | struct mr_table *mrt = it->mrt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2633 | if (it->cache == &mrt->mfc_unres_queue) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | spin_unlock_bh(&mfc_unres_lock); |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2635 | else if (it->cache == &mrt->mfc_cache_array[it->ct]) |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2636 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2637 | } |
| 2638 | |
| 2639 | static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) |
| 2640 | { |
| 2641 | int n; |
| 2642 | |
| 2643 | if (v == SEQ_START_TOKEN) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2644 | seq_puts(seq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2645 | "Group Origin Iif Pkts Bytes Wrong Oifs\n"); |
| 2646 | } else { |
| 2647 | const struct mfc_cache *mfc = v; |
| 2648 | const struct ipmr_mfc_iter *it = seq->private; |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2649 | const struct mr_table *mrt = it->mrt; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2650 | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 2651 | seq_printf(seq, "%08X %08X %-3hd", |
| 2652 | (__force u32) mfc->mfc_mcastgrp, |
| 2653 | (__force u32) mfc->mfc_origin, |
Benjamin Thery | 1ea472e | 2008-12-03 22:21:47 -0800 | [diff] [blame] | 2654 | mfc->mfc_parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2655 | |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2656 | if (it->cache != &mrt->mfc_unres_queue) { |
Benjamin Thery | 1ea472e | 2008-12-03 22:21:47 -0800 | [diff] [blame] | 2657 | seq_printf(seq, " %8lu %8lu %8lu", |
| 2658 | mfc->mfc_un.res.pkt, |
| 2659 | mfc->mfc_un.res.bytes, |
| 2660 | mfc->mfc_un.res.wrong_if); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 2661 | for (n = mfc->mfc_un.res.minvif; |
Eric Dumazet | a8cb16d | 2010-10-01 16:15:29 +0000 | [diff] [blame] | 2662 | n < mfc->mfc_un.res.maxvif; n++) { |
Patrick McHardy | 0c12295 | 2010-04-13 05:03:22 +0000 | [diff] [blame] | 2663 | if (VIF_EXISTS(mrt, n) && |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2664 | mfc->mfc_un.res.ttls[n] < 255) |
| 2665 | seq_printf(seq, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2666 | " %2d:%-3d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | n, mfc->mfc_un.res.ttls[n]); |
| 2668 | } |
Benjamin Thery | 1ea472e | 2008-12-03 22:21:47 -0800 | [diff] [blame] | 2669 | } else { |
| 2670 | /* unresolved mfc_caches don't contain |
| 2671 | * pkt, bytes and wrong_if values |
| 2672 | */ |
| 2673 | seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | } |
| 2675 | seq_putc(seq, '\n'); |
| 2676 | } |
| 2677 | return 0; |
| 2678 | } |
| 2679 | |
Stephen Hemminger | f690808 | 2007-03-12 14:34:29 -0700 | [diff] [blame] | 2680 | static const struct seq_operations ipmr_mfc_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2681 | .start = ipmr_mfc_seq_start, |
| 2682 | .next = ipmr_mfc_seq_next, |
| 2683 | .stop = ipmr_mfc_seq_stop, |
| 2684 | .show = ipmr_mfc_seq_show, |
| 2685 | }; |
| 2686 | |
| 2687 | static int ipmr_mfc_open(struct inode *inode, struct file *file) |
| 2688 | { |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2689 | return seq_open_net(inode, file, &ipmr_mfc_seq_ops, |
| 2690 | sizeof(struct ipmr_mfc_iter)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | } |
| 2692 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2693 | static const struct file_operations ipmr_mfc_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | .owner = THIS_MODULE, |
| 2695 | .open = ipmr_mfc_open, |
| 2696 | .read = seq_read, |
| 2697 | .llseek = seq_lseek, |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2698 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | }; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2700 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | |
| 2702 | #ifdef CONFIG_IP_PIMSM_V2 |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 2703 | static const struct net_protocol pim_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2704 | .handler = pim_rcv, |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 2705 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | }; |
| 2707 | #endif |
| 2708 | |
| 2709 | |
| 2710 | /* |
| 2711 | * Setup for IP multicast routing |
| 2712 | */ |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2713 | static int __net_init ipmr_net_init(struct net *net) |
| 2714 | { |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2715 | int err; |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2716 | |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2717 | err = ipmr_rules_init(net); |
| 2718 | if (err < 0) |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2719 | goto fail; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2720 | |
| 2721 | #ifdef CONFIG_PROC_FS |
| 2722 | err = -ENOMEM; |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 2723 | if (!proc_create("ip_mr_vif", 0, net->proc_net, &ipmr_vif_fops)) |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2724 | goto proc_vif_fail; |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 2725 | if (!proc_create("ip_mr_cache", 0, net->proc_net, &ipmr_mfc_fops)) |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2726 | goto proc_cache_fail; |
| 2727 | #endif |
Benjamin Thery | 2bb8b26 | 2009-01-22 04:56:18 +0000 | [diff] [blame] | 2728 | return 0; |
| 2729 | |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2730 | #ifdef CONFIG_PROC_FS |
| 2731 | proc_cache_fail: |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 2732 | remove_proc_entry("ip_mr_vif", net->proc_net); |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2733 | proc_vif_fail: |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2734 | ipmr_rules_exit(net); |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2735 | #endif |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2736 | fail: |
| 2737 | return err; |
| 2738 | } |
| 2739 | |
| 2740 | static void __net_exit ipmr_net_exit(struct net *net) |
| 2741 | { |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2742 | #ifdef CONFIG_PROC_FS |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 2743 | remove_proc_entry("ip_mr_cache", net->proc_net); |
| 2744 | remove_proc_entry("ip_mr_vif", net->proc_net); |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2745 | #endif |
Patrick McHardy | f0ad086 | 2010-04-13 05:03:23 +0000 | [diff] [blame] | 2746 | ipmr_rules_exit(net); |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2747 | } |
| 2748 | |
| 2749 | static struct pernet_operations ipmr_net_ops = { |
| 2750 | .init = ipmr_net_init, |
| 2751 | .exit = ipmr_net_exit, |
| 2752 | }; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2753 | |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 2754 | int __init ip_mr_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | { |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 2756 | int err; |
| 2757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | mrt_cachep = kmem_cache_create("ip_mrt_cache", |
| 2759 | sizeof(struct mfc_cache), |
Eric Dumazet | a8c9486 | 2010-10-01 16:15:08 +0000 | [diff] [blame] | 2760 | 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2761 | NULL); |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 2762 | if (!mrt_cachep) |
| 2763 | return -ENOMEM; |
| 2764 | |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2765 | err = register_pernet_subsys(&ipmr_net_ops); |
| 2766 | if (err) |
| 2767 | goto reg_pernet_fail; |
| 2768 | |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 2769 | err = register_netdevice_notifier(&ip_mr_notifier); |
| 2770 | if (err) |
| 2771 | goto reg_notif_fail; |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 2772 | #ifdef CONFIG_IP_PIMSM_V2 |
| 2773 | if (inet_add_protocol(&pim_protocol, IPPROTO_PIM) < 0) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 2774 | pr_err("%s: can't add PIM protocol\n", __func__); |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 2775 | err = -EAGAIN; |
| 2776 | goto add_proto_fail; |
| 2777 | } |
| 2778 | #endif |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 2779 | rtnl_register(RTNL_FAMILY_IPMR, RTM_GETROUTE, |
| 2780 | NULL, ipmr_rtm_dumproute, NULL); |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 2781 | return 0; |
Benjamin Thery | f6bb451 | 2009-01-22 04:56:22 +0000 | [diff] [blame] | 2782 | |
Tom Goff | 403dbb9 | 2009-06-14 03:16:13 -0700 | [diff] [blame] | 2783 | #ifdef CONFIG_IP_PIMSM_V2 |
| 2784 | add_proto_fail: |
| 2785 | unregister_netdevice_notifier(&ip_mr_notifier); |
| 2786 | #endif |
Benjamin Thery | c3e3889 | 2008-11-19 14:07:41 -0800 | [diff] [blame] | 2787 | reg_notif_fail: |
Benjamin Thery | cf958ae3 | 2009-01-22 04:56:16 +0000 | [diff] [blame] | 2788 | unregister_pernet_subsys(&ipmr_net_ops); |
| 2789 | reg_pernet_fail: |
Benjamin Thery | c3e3889 | 2008-11-19 14:07:41 -0800 | [diff] [blame] | 2790 | kmem_cache_destroy(mrt_cachep); |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 2791 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | } |