Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1 | /* |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2 | * Copyright (c) 2007-2009 Patrick McHardy <kaber@trash.net> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * Development of this code funded by Astaro AG (http://www.astaro.com/) |
| 9 | */ |
| 10 | |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/list.h> |
| 14 | #include <linux/skbuff.h> |
| 15 | #include <linux/netlink.h> |
| 16 | #include <linux/netfilter.h> |
| 17 | #include <linux/netfilter/nfnetlink.h> |
| 18 | #include <linux/netfilter/nf_tables.h> |
| 19 | #include <net/netfilter/nf_tables_core.h> |
| 20 | #include <net/netfilter/nf_tables.h> |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 21 | #include <net/net_namespace.h> |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 22 | #include <net/sock.h> |
| 23 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 24 | static LIST_HEAD(nf_tables_expressions); |
| 25 | |
| 26 | /** |
| 27 | * nft_register_afinfo - register nf_tables address family info |
| 28 | * |
| 29 | * @afi: address family info to register |
| 30 | * |
| 31 | * Register the address family for use with nf_tables. Returns zero on |
| 32 | * success or a negative errno code otherwise. |
| 33 | */ |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 34 | int nft_register_afinfo(struct net *net, struct nft_af_info *afi) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 35 | { |
| 36 | INIT_LIST_HEAD(&afi->tables); |
| 37 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 38 | list_add_tail_rcu(&afi->list, &net->nft.af_info); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 39 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 40 | return 0; |
| 41 | } |
| 42 | EXPORT_SYMBOL_GPL(nft_register_afinfo); |
| 43 | |
| 44 | /** |
| 45 | * nft_unregister_afinfo - unregister nf_tables address family info |
| 46 | * |
| 47 | * @afi: address family info to unregister |
| 48 | * |
| 49 | * Unregister the address family for use with nf_tables. |
| 50 | */ |
| 51 | void nft_unregister_afinfo(struct nft_af_info *afi) |
| 52 | { |
| 53 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 54 | list_del_rcu(&afi->list); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 55 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 56 | } |
| 57 | EXPORT_SYMBOL_GPL(nft_unregister_afinfo); |
| 58 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 59 | static struct nft_af_info *nft_afinfo_lookup(struct net *net, int family) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 60 | { |
| 61 | struct nft_af_info *afi; |
| 62 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 63 | list_for_each_entry(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 64 | if (afi->family == family) |
| 65 | return afi; |
| 66 | } |
| 67 | return NULL; |
| 68 | } |
| 69 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 70 | static struct nft_af_info * |
| 71 | nf_tables_afinfo_lookup(struct net *net, int family, bool autoload) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 72 | { |
| 73 | struct nft_af_info *afi; |
| 74 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 75 | afi = nft_afinfo_lookup(net, family); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 76 | if (afi != NULL) |
| 77 | return afi; |
| 78 | #ifdef CONFIG_MODULES |
| 79 | if (autoload) { |
| 80 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 81 | request_module("nft-afinfo-%u", family); |
| 82 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 83 | afi = nft_afinfo_lookup(net, family); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 84 | if (afi != NULL) |
| 85 | return ERR_PTR(-EAGAIN); |
| 86 | } |
| 87 | #endif |
| 88 | return ERR_PTR(-EAFNOSUPPORT); |
| 89 | } |
| 90 | |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 91 | static void nft_ctx_init(struct nft_ctx *ctx, |
| 92 | const struct sk_buff *skb, |
| 93 | const struct nlmsghdr *nlh, |
| 94 | struct nft_af_info *afi, |
| 95 | struct nft_table *table, |
| 96 | struct nft_chain *chain, |
| 97 | const struct nlattr * const *nla) |
| 98 | { |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 99 | ctx->net = sock_net(skb->sk); |
| 100 | ctx->afi = afi; |
| 101 | ctx->table = table; |
| 102 | ctx->chain = chain; |
| 103 | ctx->nla = nla; |
| 104 | ctx->portid = NETLINK_CB(skb).portid; |
| 105 | ctx->report = nlmsg_report(nlh); |
| 106 | ctx->seq = nlh->nlmsg_seq; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 107 | } |
| 108 | |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 109 | static struct nft_trans *nft_trans_alloc(struct nft_ctx *ctx, int msg_type, |
| 110 | u32 size) |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 111 | { |
| 112 | struct nft_trans *trans; |
| 113 | |
| 114 | trans = kzalloc(sizeof(struct nft_trans) + size, GFP_KERNEL); |
| 115 | if (trans == NULL) |
| 116 | return NULL; |
| 117 | |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 118 | trans->msg_type = msg_type; |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 119 | trans->ctx = *ctx; |
| 120 | |
| 121 | return trans; |
| 122 | } |
| 123 | |
| 124 | static void nft_trans_destroy(struct nft_trans *trans) |
| 125 | { |
| 126 | list_del(&trans->list); |
| 127 | kfree(trans); |
| 128 | } |
| 129 | |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 130 | static void nf_tables_unregister_hooks(const struct nft_table *table, |
| 131 | const struct nft_chain *chain, |
| 132 | unsigned int hook_nops) |
| 133 | { |
| 134 | if (!(table->flags & NFT_TABLE_F_DORMANT) && |
| 135 | chain->flags & NFT_BASE_CHAIN) |
| 136 | nf_unregister_hooks(nft_base_chain(chain)->ops, hook_nops); |
| 137 | } |
| 138 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 139 | /* Internal table flags */ |
| 140 | #define NFT_TABLE_INACTIVE (1 << 15) |
| 141 | |
| 142 | static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type) |
| 143 | { |
| 144 | struct nft_trans *trans; |
| 145 | |
| 146 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table)); |
| 147 | if (trans == NULL) |
| 148 | return -ENOMEM; |
| 149 | |
| 150 | if (msg_type == NFT_MSG_NEWTABLE) |
| 151 | ctx->table->flags |= NFT_TABLE_INACTIVE; |
| 152 | |
| 153 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static int nft_deltable(struct nft_ctx *ctx) |
| 158 | { |
| 159 | int err; |
| 160 | |
| 161 | err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE); |
| 162 | if (err < 0) |
| 163 | return err; |
| 164 | |
| 165 | list_del_rcu(&ctx->table->list); |
| 166 | return err; |
| 167 | } |
| 168 | |
| 169 | static int nft_trans_chain_add(struct nft_ctx *ctx, int msg_type) |
| 170 | { |
| 171 | struct nft_trans *trans; |
| 172 | |
| 173 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain)); |
| 174 | if (trans == NULL) |
| 175 | return -ENOMEM; |
| 176 | |
| 177 | if (msg_type == NFT_MSG_NEWCHAIN) |
| 178 | ctx->chain->flags |= NFT_CHAIN_INACTIVE; |
| 179 | |
| 180 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | static int nft_delchain(struct nft_ctx *ctx) |
| 185 | { |
| 186 | int err; |
| 187 | |
| 188 | err = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN); |
| 189 | if (err < 0) |
| 190 | return err; |
| 191 | |
| 192 | ctx->table->use--; |
| 193 | list_del_rcu(&ctx->chain->list); |
| 194 | |
| 195 | return err; |
| 196 | } |
| 197 | |
| 198 | static inline bool |
| 199 | nft_rule_is_active(struct net *net, const struct nft_rule *rule) |
| 200 | { |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 201 | return (rule->genmask & nft_genmask_cur(net)) == 0; |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | static inline int |
| 205 | nft_rule_is_active_next(struct net *net, const struct nft_rule *rule) |
| 206 | { |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 207 | return (rule->genmask & nft_genmask_next(net)) == 0; |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | static inline void |
| 211 | nft_rule_activate_next(struct net *net, struct nft_rule *rule) |
| 212 | { |
| 213 | /* Now inactive, will be active in the future */ |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 214 | rule->genmask = nft_genmask_cur(net); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | static inline void |
| 218 | nft_rule_deactivate_next(struct net *net, struct nft_rule *rule) |
| 219 | { |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 220 | rule->genmask = nft_genmask_next(net); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static inline void nft_rule_clear(struct net *net, struct nft_rule *rule) |
| 224 | { |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 225 | rule->genmask &= ~nft_genmask_next(net); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | static int |
| 229 | nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule) |
| 230 | { |
| 231 | /* You cannot delete the same rule twice */ |
| 232 | if (nft_rule_is_active_next(ctx->net, rule)) { |
| 233 | nft_rule_deactivate_next(ctx->net, rule); |
| 234 | ctx->chain->use--; |
| 235 | return 0; |
| 236 | } |
| 237 | return -ENOENT; |
| 238 | } |
| 239 | |
| 240 | static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type, |
| 241 | struct nft_rule *rule) |
| 242 | { |
| 243 | struct nft_trans *trans; |
| 244 | |
| 245 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule)); |
| 246 | if (trans == NULL) |
| 247 | return NULL; |
| 248 | |
| 249 | nft_trans_rule(trans) = rule; |
| 250 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 251 | |
| 252 | return trans; |
| 253 | } |
| 254 | |
| 255 | static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule) |
| 256 | { |
| 257 | struct nft_trans *trans; |
| 258 | int err; |
| 259 | |
| 260 | trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule); |
| 261 | if (trans == NULL) |
| 262 | return -ENOMEM; |
| 263 | |
| 264 | err = nf_tables_delrule_deactivate(ctx, rule); |
| 265 | if (err < 0) { |
| 266 | nft_trans_destroy(trans); |
| 267 | return err; |
| 268 | } |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static int nft_delrule_by_chain(struct nft_ctx *ctx) |
| 274 | { |
| 275 | struct nft_rule *rule; |
| 276 | int err; |
| 277 | |
| 278 | list_for_each_entry(rule, &ctx->chain->rules, list) { |
| 279 | err = nft_delrule(ctx, rule); |
| 280 | if (err < 0) |
| 281 | return err; |
| 282 | } |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | /* Internal set flag */ |
| 287 | #define NFT_SET_INACTIVE (1 << 15) |
| 288 | |
| 289 | static int nft_trans_set_add(struct nft_ctx *ctx, int msg_type, |
| 290 | struct nft_set *set) |
| 291 | { |
| 292 | struct nft_trans *trans; |
| 293 | |
| 294 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set)); |
| 295 | if (trans == NULL) |
| 296 | return -ENOMEM; |
| 297 | |
| 298 | if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] != NULL) { |
| 299 | nft_trans_set_id(trans) = |
| 300 | ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID])); |
| 301 | set->flags |= NFT_SET_INACTIVE; |
| 302 | } |
| 303 | nft_trans_set(trans) = set; |
| 304 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int nft_delset(struct nft_ctx *ctx, struct nft_set *set) |
| 310 | { |
| 311 | int err; |
| 312 | |
| 313 | err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set); |
| 314 | if (err < 0) |
| 315 | return err; |
| 316 | |
| 317 | list_del_rcu(&set->list); |
| 318 | ctx->table->use--; |
| 319 | |
| 320 | return err; |
| 321 | } |
| 322 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 323 | /* |
| 324 | * Tables |
| 325 | */ |
| 326 | |
| 327 | static struct nft_table *nft_table_lookup(const struct nft_af_info *afi, |
| 328 | const struct nlattr *nla) |
| 329 | { |
| 330 | struct nft_table *table; |
| 331 | |
| 332 | list_for_each_entry(table, &afi->tables, list) { |
| 333 | if (!nla_strcmp(nla, table->name)) |
| 334 | return table; |
| 335 | } |
| 336 | return NULL; |
| 337 | } |
| 338 | |
| 339 | static struct nft_table *nf_tables_table_lookup(const struct nft_af_info *afi, |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 340 | const struct nlattr *nla) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 341 | { |
| 342 | struct nft_table *table; |
| 343 | |
| 344 | if (nla == NULL) |
| 345 | return ERR_PTR(-EINVAL); |
| 346 | |
| 347 | table = nft_table_lookup(afi, nla); |
| 348 | if (table != NULL) |
| 349 | return table; |
| 350 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 351 | return ERR_PTR(-ENOENT); |
| 352 | } |
| 353 | |
| 354 | static inline u64 nf_tables_alloc_handle(struct nft_table *table) |
| 355 | { |
| 356 | return ++table->hgenerator; |
| 357 | } |
| 358 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 359 | static const struct nf_chain_type *chain_type[AF_MAX][NFT_CHAIN_T_MAX]; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 360 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 361 | static const struct nf_chain_type * |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 362 | __nf_tables_chain_type_lookup(int family, const struct nlattr *nla) |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 363 | { |
| 364 | int i; |
| 365 | |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 366 | for (i = 0; i < NFT_CHAIN_T_MAX; i++) { |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 367 | if (chain_type[family][i] != NULL && |
| 368 | !nla_strcmp(nla, chain_type[family][i]->name)) |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 369 | return chain_type[family][i]; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 370 | } |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 371 | return NULL; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 372 | } |
| 373 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 374 | static const struct nf_chain_type * |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 375 | nf_tables_chain_type_lookup(const struct nft_af_info *afi, |
| 376 | const struct nlattr *nla, |
| 377 | bool autoload) |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 378 | { |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 379 | const struct nf_chain_type *type; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 380 | |
| 381 | type = __nf_tables_chain_type_lookup(afi->family, nla); |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 382 | if (type != NULL) |
| 383 | return type; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 384 | #ifdef CONFIG_MODULES |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 385 | if (autoload) { |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 386 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 2fec6bb | 2014-03-31 12:26:39 +0200 | [diff] [blame] | 387 | request_module("nft-chain-%u-%.*s", afi->family, |
| 388 | nla_len(nla), (const char *)nla_data(nla)); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 389 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
| 390 | type = __nf_tables_chain_type_lookup(afi->family, nla); |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 391 | if (type != NULL) |
| 392 | return ERR_PTR(-EAGAIN); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 393 | } |
| 394 | #endif |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 395 | return ERR_PTR(-ENOENT); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 396 | } |
| 397 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 398 | static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = { |
Pablo Neira Ayuso | 1cae565 | 2015-03-05 15:05:36 +0100 | [diff] [blame] | 399 | [NFTA_TABLE_NAME] = { .type = NLA_STRING, |
| 400 | .len = NFT_TABLE_MAXNAMELEN - 1 }, |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 401 | [NFTA_TABLE_FLAGS] = { .type = NLA_U32 }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 402 | }; |
| 403 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 404 | static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, |
| 405 | u32 portid, u32 seq, int event, u32 flags, |
| 406 | int family, const struct nft_table *table) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 407 | { |
| 408 | struct nlmsghdr *nlh; |
| 409 | struct nfgenmsg *nfmsg; |
| 410 | |
| 411 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 412 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
| 413 | if (nlh == NULL) |
| 414 | goto nla_put_failure; |
| 415 | |
| 416 | nfmsg = nlmsg_data(nlh); |
| 417 | nfmsg->nfgen_family = family; |
| 418 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 419 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 420 | |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 421 | if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) || |
Tomasz Bursztyka | d8bcc768 | 2013-12-12 15:00:42 +0200 | [diff] [blame] | 422 | nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags)) || |
| 423 | nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use))) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 424 | goto nla_put_failure; |
| 425 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 426 | nlmsg_end(skb, nlh); |
| 427 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 428 | |
| 429 | nla_put_failure: |
| 430 | nlmsg_trim(skb, nlh); |
| 431 | return -1; |
| 432 | } |
| 433 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 434 | static int nf_tables_table_notify(const struct nft_ctx *ctx, int event) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 435 | { |
| 436 | struct sk_buff *skb; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 437 | int err; |
| 438 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 439 | if (!ctx->report && |
| 440 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 441 | return 0; |
| 442 | |
| 443 | err = -ENOBUFS; |
| 444 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 445 | if (skb == NULL) |
| 446 | goto err; |
| 447 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 448 | err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq, |
| 449 | event, 0, ctx->afi->family, ctx->table); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 450 | if (err < 0) { |
| 451 | kfree_skb(skb); |
| 452 | goto err; |
| 453 | } |
| 454 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 455 | err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 456 | ctx->report, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 457 | err: |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 458 | if (err < 0) { |
| 459 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 460 | err); |
| 461 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 462 | return err; |
| 463 | } |
| 464 | |
| 465 | static int nf_tables_dump_tables(struct sk_buff *skb, |
| 466 | struct netlink_callback *cb) |
| 467 | { |
| 468 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 469 | const struct nft_af_info *afi; |
| 470 | const struct nft_table *table; |
| 471 | unsigned int idx = 0, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 472 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 473 | int family = nfmsg->nfgen_family; |
| 474 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 475 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 476 | cb->seq = net->nft.base_seq; |
| 477 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 478 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 479 | if (family != NFPROTO_UNSPEC && family != afi->family) |
| 480 | continue; |
| 481 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 482 | list_for_each_entry_rcu(table, &afi->tables, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 483 | if (idx < s_idx) |
| 484 | goto cont; |
| 485 | if (idx > s_idx) |
| 486 | memset(&cb->args[1], 0, |
| 487 | sizeof(cb->args) - sizeof(cb->args[0])); |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 488 | if (nf_tables_fill_table_info(skb, net, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 489 | NETLINK_CB(cb->skb).portid, |
| 490 | cb->nlh->nlmsg_seq, |
| 491 | NFT_MSG_NEWTABLE, |
| 492 | NLM_F_MULTI, |
| 493 | afi->family, table) < 0) |
| 494 | goto done; |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 495 | |
| 496 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 497 | cont: |
| 498 | idx++; |
| 499 | } |
| 500 | } |
| 501 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 502 | rcu_read_unlock(); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 503 | cb->args[0] = idx; |
| 504 | return skb->len; |
| 505 | } |
| 506 | |
| 507 | static int nf_tables_gettable(struct sock *nlsk, struct sk_buff *skb, |
| 508 | const struct nlmsghdr *nlh, |
| 509 | const struct nlattr * const nla[]) |
| 510 | { |
| 511 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 512 | const struct nft_af_info *afi; |
| 513 | const struct nft_table *table; |
| 514 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 515 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 516 | int family = nfmsg->nfgen_family; |
| 517 | int err; |
| 518 | |
| 519 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 520 | struct netlink_dump_control c = { |
| 521 | .dump = nf_tables_dump_tables, |
| 522 | }; |
| 523 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 524 | } |
| 525 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 526 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 527 | if (IS_ERR(afi)) |
| 528 | return PTR_ERR(afi); |
| 529 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 530 | table = nf_tables_table_lookup(afi, nla[NFTA_TABLE_NAME]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 531 | if (IS_ERR(table)) |
| 532 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 533 | if (table->flags & NFT_TABLE_INACTIVE) |
| 534 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 535 | |
| 536 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 537 | if (!skb2) |
| 538 | return -ENOMEM; |
| 539 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 540 | err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 541 | nlh->nlmsg_seq, NFT_MSG_NEWTABLE, 0, |
| 542 | family, table); |
| 543 | if (err < 0) |
| 544 | goto err; |
| 545 | |
| 546 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 547 | |
| 548 | err: |
| 549 | kfree_skb(skb2); |
| 550 | return err; |
| 551 | } |
| 552 | |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 553 | static int nf_tables_table_enable(const struct nft_af_info *afi, |
| 554 | struct nft_table *table) |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 555 | { |
| 556 | struct nft_chain *chain; |
| 557 | int err, i = 0; |
| 558 | |
| 559 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 560 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 561 | continue; |
| 562 | |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 563 | err = nf_register_hooks(nft_base_chain(chain)->ops, afi->nops); |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 564 | if (err < 0) |
| 565 | goto err; |
| 566 | |
| 567 | i++; |
| 568 | } |
| 569 | return 0; |
| 570 | err: |
| 571 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 572 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 573 | continue; |
| 574 | |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 575 | if (i-- <= 0) |
| 576 | break; |
| 577 | |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 578 | nf_unregister_hooks(nft_base_chain(chain)->ops, afi->nops); |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 579 | } |
| 580 | return err; |
| 581 | } |
| 582 | |
Pablo Neira Ayuso | f75edf5 | 2014-03-30 14:04:52 +0200 | [diff] [blame] | 583 | static void nf_tables_table_disable(const struct nft_af_info *afi, |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 584 | struct nft_table *table) |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 585 | { |
| 586 | struct nft_chain *chain; |
| 587 | |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 588 | list_for_each_entry(chain, &table->chains, list) { |
| 589 | if (chain->flags & NFT_BASE_CHAIN) |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 590 | nf_unregister_hooks(nft_base_chain(chain)->ops, |
| 591 | afi->nops); |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 592 | } |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 593 | } |
| 594 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 595 | static int nf_tables_updtable(struct nft_ctx *ctx) |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 596 | { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 597 | struct nft_trans *trans; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 598 | u32 flags; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 599 | int ret = 0; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 600 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 601 | if (!ctx->nla[NFTA_TABLE_FLAGS]) |
| 602 | return 0; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 603 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 604 | flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS])); |
| 605 | if (flags & ~NFT_TABLE_F_DORMANT) |
| 606 | return -EINVAL; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 607 | |
Pablo Neira Ayuso | 63283dd | 2014-06-27 18:51:39 +0200 | [diff] [blame] | 608 | if (flags == ctx->table->flags) |
| 609 | return 0; |
| 610 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 611 | trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE, |
| 612 | sizeof(struct nft_trans_table)); |
| 613 | if (trans == NULL) |
| 614 | return -ENOMEM; |
| 615 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 616 | if ((flags & NFT_TABLE_F_DORMANT) && |
| 617 | !(ctx->table->flags & NFT_TABLE_F_DORMANT)) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 618 | nft_trans_table_enable(trans) = false; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 619 | } else if (!(flags & NFT_TABLE_F_DORMANT) && |
| 620 | ctx->table->flags & NFT_TABLE_F_DORMANT) { |
| 621 | ret = nf_tables_table_enable(ctx->afi, ctx->table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 622 | if (ret >= 0) { |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 623 | ctx->table->flags &= ~NFT_TABLE_F_DORMANT; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 624 | nft_trans_table_enable(trans) = true; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 625 | } |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 626 | } |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 627 | if (ret < 0) |
| 628 | goto err; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 629 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 630 | nft_trans_table_update(trans) = true; |
| 631 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 632 | return 0; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 633 | err: |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 634 | nft_trans_destroy(trans); |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 635 | return ret; |
| 636 | } |
| 637 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 638 | static int nf_tables_newtable(struct sock *nlsk, struct sk_buff *skb, |
| 639 | const struct nlmsghdr *nlh, |
| 640 | const struct nlattr * const nla[]) |
| 641 | { |
| 642 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 643 | const struct nlattr *name; |
| 644 | struct nft_af_info *afi; |
| 645 | struct nft_table *table; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 646 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 647 | int family = nfmsg->nfgen_family; |
Patrick McHardy | c5c1f97 | 2014-01-09 18:42:39 +0000 | [diff] [blame] | 648 | u32 flags = 0; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 649 | struct nft_ctx ctx; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 650 | int err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 651 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 652 | afi = nf_tables_afinfo_lookup(net, family, true); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 653 | if (IS_ERR(afi)) |
| 654 | return PTR_ERR(afi); |
| 655 | |
| 656 | name = nla[NFTA_TABLE_NAME]; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 657 | table = nf_tables_table_lookup(afi, name); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 658 | if (IS_ERR(table)) { |
| 659 | if (PTR_ERR(table) != -ENOENT) |
| 660 | return PTR_ERR(table); |
| 661 | table = NULL; |
| 662 | } |
| 663 | |
| 664 | if (table != NULL) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 665 | if (table->flags & NFT_TABLE_INACTIVE) |
| 666 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 667 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 668 | return -EEXIST; |
| 669 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 670 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 671 | |
| 672 | nft_ctx_init(&ctx, skb, nlh, afi, table, NULL, nla); |
| 673 | return nf_tables_updtable(&ctx); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 674 | } |
| 675 | |
Patrick McHardy | c5c1f97 | 2014-01-09 18:42:39 +0000 | [diff] [blame] | 676 | if (nla[NFTA_TABLE_FLAGS]) { |
| 677 | flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS])); |
| 678 | if (flags & ~NFT_TABLE_F_DORMANT) |
| 679 | return -EINVAL; |
| 680 | } |
| 681 | |
Patrick McHardy | 7047f9d | 2014-01-09 18:42:40 +0000 | [diff] [blame] | 682 | if (!try_module_get(afi->owner)) |
| 683 | return -EAFNOSUPPORT; |
| 684 | |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 685 | err = -ENOMEM; |
Pablo Neira Ayuso | 1cae565 | 2015-03-05 15:05:36 +0100 | [diff] [blame] | 686 | table = kzalloc(sizeof(*table), GFP_KERNEL); |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 687 | if (table == NULL) |
| 688 | goto err1; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 689 | |
Pablo Neira Ayuso | 1cae565 | 2015-03-05 15:05:36 +0100 | [diff] [blame] | 690 | nla_strlcpy(table->name, name, NFT_TABLE_MAXNAMELEN); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 691 | INIT_LIST_HEAD(&table->chains); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 692 | INIT_LIST_HEAD(&table->sets); |
Patrick McHardy | c5c1f97 | 2014-01-09 18:42:39 +0000 | [diff] [blame] | 693 | table->flags = flags; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 694 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 695 | nft_ctx_init(&ctx, skb, nlh, afi, table, NULL, nla); |
| 696 | err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE); |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 697 | if (err < 0) |
| 698 | goto err2; |
| 699 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 700 | list_add_tail_rcu(&table->list, &afi->tables); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 701 | return 0; |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 702 | err2: |
| 703 | kfree(table); |
| 704 | err1: |
| 705 | module_put(afi->owner); |
| 706 | return err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 707 | } |
| 708 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 709 | static int nft_flush_table(struct nft_ctx *ctx) |
| 710 | { |
| 711 | int err; |
| 712 | struct nft_chain *chain, *nc; |
| 713 | struct nft_set *set, *ns; |
| 714 | |
Pablo Neira Ayuso | a2f18db | 2015-01-04 15:14:22 +0100 | [diff] [blame] | 715 | list_for_each_entry(chain, &ctx->table->chains, list) { |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 716 | ctx->chain = chain; |
| 717 | |
| 718 | err = nft_delrule_by_chain(ctx); |
| 719 | if (err < 0) |
| 720 | goto out; |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | list_for_each_entry_safe(set, ns, &ctx->table->sets, list) { |
| 724 | if (set->flags & NFT_SET_ANONYMOUS && |
| 725 | !list_empty(&set->bindings)) |
| 726 | continue; |
| 727 | |
| 728 | err = nft_delset(ctx, set); |
| 729 | if (err < 0) |
| 730 | goto out; |
| 731 | } |
| 732 | |
Pablo Neira Ayuso | a2f18db | 2015-01-04 15:14:22 +0100 | [diff] [blame] | 733 | list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) { |
| 734 | ctx->chain = chain; |
| 735 | |
| 736 | err = nft_delchain(ctx); |
| 737 | if (err < 0) |
| 738 | goto out; |
| 739 | } |
| 740 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 741 | err = nft_deltable(ctx); |
| 742 | out: |
| 743 | return err; |
| 744 | } |
| 745 | |
| 746 | static int nft_flush(struct nft_ctx *ctx, int family) |
| 747 | { |
| 748 | struct nft_af_info *afi; |
| 749 | struct nft_table *table, *nt; |
| 750 | const struct nlattr * const *nla = ctx->nla; |
| 751 | int err = 0; |
| 752 | |
| 753 | list_for_each_entry(afi, &ctx->net->nft.af_info, list) { |
| 754 | if (family != AF_UNSPEC && afi->family != family) |
| 755 | continue; |
| 756 | |
| 757 | ctx->afi = afi; |
| 758 | list_for_each_entry_safe(table, nt, &afi->tables, list) { |
| 759 | if (nla[NFTA_TABLE_NAME] && |
| 760 | nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0) |
| 761 | continue; |
| 762 | |
| 763 | ctx->table = table; |
| 764 | |
| 765 | err = nft_flush_table(ctx); |
| 766 | if (err < 0) |
| 767 | goto out; |
| 768 | } |
| 769 | } |
| 770 | out: |
| 771 | return err; |
| 772 | } |
| 773 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 774 | static int nf_tables_deltable(struct sock *nlsk, struct sk_buff *skb, |
| 775 | const struct nlmsghdr *nlh, |
| 776 | const struct nlattr * const nla[]) |
| 777 | { |
| 778 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 779 | struct nft_af_info *afi; |
| 780 | struct nft_table *table; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 781 | struct net *net = sock_net(skb->sk); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 782 | int family = nfmsg->nfgen_family; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 783 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 784 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 785 | nft_ctx_init(&ctx, skb, nlh, NULL, NULL, NULL, nla); |
| 786 | if (family == AF_UNSPEC || nla[NFTA_TABLE_NAME] == NULL) |
| 787 | return nft_flush(&ctx, family); |
| 788 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 789 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 790 | if (IS_ERR(afi)) |
| 791 | return PTR_ERR(afi); |
| 792 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 793 | table = nf_tables_table_lookup(afi, nla[NFTA_TABLE_NAME]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 794 | if (IS_ERR(table)) |
| 795 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 796 | if (table->flags & NFT_TABLE_INACTIVE) |
| 797 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 798 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 799 | ctx.afi = afi; |
| 800 | ctx.table = table; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 801 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 802 | return nft_flush_table(&ctx); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 803 | } |
| 804 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 805 | static void nf_tables_table_destroy(struct nft_ctx *ctx) |
| 806 | { |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 807 | BUG_ON(ctx->table->use > 0); |
| 808 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 809 | kfree(ctx->table); |
| 810 | module_put(ctx->afi->owner); |
| 811 | } |
| 812 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 813 | int nft_register_chain_type(const struct nf_chain_type *ctype) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 814 | { |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 815 | int err = 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 816 | |
| 817 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 818 | if (chain_type[ctype->family][ctype->type] != NULL) { |
| 819 | err = -EBUSY; |
| 820 | goto out; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 821 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 822 | chain_type[ctype->family][ctype->type] = ctype; |
| 823 | out: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 824 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 825 | return err; |
| 826 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 827 | EXPORT_SYMBOL_GPL(nft_register_chain_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 828 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 829 | void nft_unregister_chain_type(const struct nf_chain_type *ctype) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 830 | { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 831 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 832 | chain_type[ctype->family][ctype->type] = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 833 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 834 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 835 | EXPORT_SYMBOL_GPL(nft_unregister_chain_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 836 | |
| 837 | /* |
| 838 | * Chains |
| 839 | */ |
| 840 | |
| 841 | static struct nft_chain * |
| 842 | nf_tables_chain_lookup_byhandle(const struct nft_table *table, u64 handle) |
| 843 | { |
| 844 | struct nft_chain *chain; |
| 845 | |
| 846 | list_for_each_entry(chain, &table->chains, list) { |
| 847 | if (chain->handle == handle) |
| 848 | return chain; |
| 849 | } |
| 850 | |
| 851 | return ERR_PTR(-ENOENT); |
| 852 | } |
| 853 | |
| 854 | static struct nft_chain *nf_tables_chain_lookup(const struct nft_table *table, |
| 855 | const struct nlattr *nla) |
| 856 | { |
| 857 | struct nft_chain *chain; |
| 858 | |
| 859 | if (nla == NULL) |
| 860 | return ERR_PTR(-EINVAL); |
| 861 | |
| 862 | list_for_each_entry(chain, &table->chains, list) { |
| 863 | if (!nla_strcmp(nla, chain->name)) |
| 864 | return chain; |
| 865 | } |
| 866 | |
| 867 | return ERR_PTR(-ENOENT); |
| 868 | } |
| 869 | |
| 870 | static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = { |
| 871 | [NFTA_CHAIN_TABLE] = { .type = NLA_STRING }, |
| 872 | [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 }, |
| 873 | [NFTA_CHAIN_NAME] = { .type = NLA_STRING, |
| 874 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, |
| 875 | [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 876 | [NFTA_CHAIN_POLICY] = { .type = NLA_U32 }, |
Pablo Neira | 4c1f781 | 2014-03-31 17:43:47 +0200 | [diff] [blame] | 877 | [NFTA_CHAIN_TYPE] = { .type = NLA_STRING }, |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 878 | [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 879 | }; |
| 880 | |
| 881 | static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = { |
| 882 | [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 }, |
| 883 | [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 }, |
| 884 | }; |
| 885 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 886 | static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats) |
| 887 | { |
| 888 | struct nft_stats *cpu_stats, total; |
| 889 | struct nlattr *nest; |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 890 | unsigned int seq; |
| 891 | u64 pkts, bytes; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 892 | int cpu; |
| 893 | |
| 894 | memset(&total, 0, sizeof(total)); |
| 895 | for_each_possible_cpu(cpu) { |
| 896 | cpu_stats = per_cpu_ptr(stats, cpu); |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 897 | do { |
| 898 | seq = u64_stats_fetch_begin_irq(&cpu_stats->syncp); |
| 899 | pkts = cpu_stats->pkts; |
| 900 | bytes = cpu_stats->bytes; |
| 901 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, seq)); |
| 902 | total.pkts += pkts; |
| 903 | total.bytes += bytes; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 904 | } |
| 905 | nest = nla_nest_start(skb, NFTA_CHAIN_COUNTERS); |
| 906 | if (nest == NULL) |
| 907 | goto nla_put_failure; |
| 908 | |
| 909 | if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts)) || |
| 910 | nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes))) |
| 911 | goto nla_put_failure; |
| 912 | |
| 913 | nla_nest_end(skb, nest); |
| 914 | return 0; |
| 915 | |
| 916 | nla_put_failure: |
| 917 | return -ENOSPC; |
| 918 | } |
| 919 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 920 | static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net, |
| 921 | u32 portid, u32 seq, int event, u32 flags, |
| 922 | int family, const struct nft_table *table, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 923 | const struct nft_chain *chain) |
| 924 | { |
| 925 | struct nlmsghdr *nlh; |
| 926 | struct nfgenmsg *nfmsg; |
| 927 | |
| 928 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 929 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
| 930 | if (nlh == NULL) |
| 931 | goto nla_put_failure; |
| 932 | |
| 933 | nfmsg = nlmsg_data(nlh); |
| 934 | nfmsg->nfgen_family = family; |
| 935 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 936 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 937 | |
| 938 | if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name)) |
| 939 | goto nla_put_failure; |
| 940 | if (nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle))) |
| 941 | goto nla_put_failure; |
| 942 | if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name)) |
| 943 | goto nla_put_failure; |
| 944 | |
| 945 | if (chain->flags & NFT_BASE_CHAIN) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 946 | const struct nft_base_chain *basechain = nft_base_chain(chain); |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 947 | const struct nf_hook_ops *ops = &basechain->ops[0]; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 948 | struct nlattr *nest; |
| 949 | |
| 950 | nest = nla_nest_start(skb, NFTA_CHAIN_HOOK); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 951 | if (nest == NULL) |
| 952 | goto nla_put_failure; |
| 953 | if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum))) |
| 954 | goto nla_put_failure; |
| 955 | if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority))) |
| 956 | goto nla_put_failure; |
| 957 | nla_nest_end(skb, nest); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 958 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 959 | if (nla_put_be32(skb, NFTA_CHAIN_POLICY, |
| 960 | htonl(basechain->policy))) |
| 961 | goto nla_put_failure; |
| 962 | |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 963 | if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name)) |
| 964 | goto nla_put_failure; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 965 | |
| 966 | if (nft_dump_stats(skb, nft_base_chain(chain)->stats)) |
| 967 | goto nla_put_failure; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 968 | } |
| 969 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 970 | if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use))) |
| 971 | goto nla_put_failure; |
| 972 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 973 | nlmsg_end(skb, nlh); |
| 974 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 975 | |
| 976 | nla_put_failure: |
| 977 | nlmsg_trim(skb, nlh); |
| 978 | return -1; |
| 979 | } |
| 980 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 981 | static int nf_tables_chain_notify(const struct nft_ctx *ctx, int event) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 982 | { |
| 983 | struct sk_buff *skb; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 984 | int err; |
| 985 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 986 | if (!ctx->report && |
| 987 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 988 | return 0; |
| 989 | |
| 990 | err = -ENOBUFS; |
| 991 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 992 | if (skb == NULL) |
| 993 | goto err; |
| 994 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 995 | err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq, |
| 996 | event, 0, ctx->afi->family, ctx->table, |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 997 | ctx->chain); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 998 | if (err < 0) { |
| 999 | kfree_skb(skb); |
| 1000 | goto err; |
| 1001 | } |
| 1002 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1003 | err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1004 | ctx->report, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1005 | err: |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1006 | if (err < 0) { |
| 1007 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1008 | err); |
| 1009 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1010 | return err; |
| 1011 | } |
| 1012 | |
| 1013 | static int nf_tables_dump_chains(struct sk_buff *skb, |
| 1014 | struct netlink_callback *cb) |
| 1015 | { |
| 1016 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 1017 | const struct nft_af_info *afi; |
| 1018 | const struct nft_table *table; |
| 1019 | const struct nft_chain *chain; |
| 1020 | unsigned int idx = 0, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1021 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1022 | int family = nfmsg->nfgen_family; |
| 1023 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1024 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1025 | cb->seq = net->nft.base_seq; |
| 1026 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1027 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1028 | if (family != NFPROTO_UNSPEC && family != afi->family) |
| 1029 | continue; |
| 1030 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1031 | list_for_each_entry_rcu(table, &afi->tables, list) { |
| 1032 | list_for_each_entry_rcu(chain, &table->chains, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1033 | if (idx < s_idx) |
| 1034 | goto cont; |
| 1035 | if (idx > s_idx) |
| 1036 | memset(&cb->args[1], 0, |
| 1037 | sizeof(cb->args) - sizeof(cb->args[0])); |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1038 | if (nf_tables_fill_chain_info(skb, net, |
| 1039 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1040 | cb->nlh->nlmsg_seq, |
| 1041 | NFT_MSG_NEWCHAIN, |
| 1042 | NLM_F_MULTI, |
| 1043 | afi->family, table, chain) < 0) |
| 1044 | goto done; |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1045 | |
| 1046 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1047 | cont: |
| 1048 | idx++; |
| 1049 | } |
| 1050 | } |
| 1051 | } |
| 1052 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1053 | rcu_read_unlock(); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1054 | cb->args[0] = idx; |
| 1055 | return skb->len; |
| 1056 | } |
| 1057 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1058 | static int nf_tables_getchain(struct sock *nlsk, struct sk_buff *skb, |
| 1059 | const struct nlmsghdr *nlh, |
| 1060 | const struct nlattr * const nla[]) |
| 1061 | { |
| 1062 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 1063 | const struct nft_af_info *afi; |
| 1064 | const struct nft_table *table; |
| 1065 | const struct nft_chain *chain; |
| 1066 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1067 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1068 | int family = nfmsg->nfgen_family; |
| 1069 | int err; |
| 1070 | |
| 1071 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1072 | struct netlink_dump_control c = { |
| 1073 | .dump = nf_tables_dump_chains, |
| 1074 | }; |
| 1075 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 1076 | } |
| 1077 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1078 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1079 | if (IS_ERR(afi)) |
| 1080 | return PTR_ERR(afi); |
| 1081 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1082 | table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1083 | if (IS_ERR(table)) |
| 1084 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 1085 | if (table->flags & NFT_TABLE_INACTIVE) |
| 1086 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1087 | |
| 1088 | chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME]); |
| 1089 | if (IS_ERR(chain)) |
| 1090 | return PTR_ERR(chain); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1091 | if (chain->flags & NFT_CHAIN_INACTIVE) |
| 1092 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1093 | |
| 1094 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1095 | if (!skb2) |
| 1096 | return -ENOMEM; |
| 1097 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1098 | err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1099 | nlh->nlmsg_seq, NFT_MSG_NEWCHAIN, 0, |
| 1100 | family, table, chain); |
| 1101 | if (err < 0) |
| 1102 | goto err; |
| 1103 | |
| 1104 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 1105 | |
| 1106 | err: |
| 1107 | kfree_skb(skb2); |
| 1108 | return err; |
| 1109 | } |
| 1110 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1111 | static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = { |
| 1112 | [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 }, |
| 1113 | [NFTA_COUNTER_BYTES] = { .type = NLA_U64 }, |
| 1114 | }; |
| 1115 | |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1116 | static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr) |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1117 | { |
| 1118 | struct nlattr *tb[NFTA_COUNTER_MAX+1]; |
| 1119 | struct nft_stats __percpu *newstats; |
| 1120 | struct nft_stats *stats; |
| 1121 | int err; |
| 1122 | |
| 1123 | err = nla_parse_nested(tb, NFTA_COUNTER_MAX, attr, nft_counter_policy); |
| 1124 | if (err < 0) |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1125 | return ERR_PTR(err); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1126 | |
| 1127 | if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS]) |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1128 | return ERR_PTR(-EINVAL); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1129 | |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 1130 | newstats = netdev_alloc_pcpu_stats(struct nft_stats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1131 | if (newstats == NULL) |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1132 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1133 | |
| 1134 | /* Restore old counters on this cpu, no problem. Per-cpu statistics |
| 1135 | * are not exposed to userspace. |
| 1136 | */ |
Pablo Neira Ayuso | e8781f7 | 2015-01-21 18:04:18 +0100 | [diff] [blame] | 1137 | preempt_disable(); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1138 | stats = this_cpu_ptr(newstats); |
| 1139 | stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES])); |
| 1140 | stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS])); |
Pablo Neira Ayuso | e8781f7 | 2015-01-21 18:04:18 +0100 | [diff] [blame] | 1141 | preempt_enable(); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1142 | |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1143 | return newstats; |
| 1144 | } |
| 1145 | |
| 1146 | static void nft_chain_stats_replace(struct nft_base_chain *chain, |
| 1147 | struct nft_stats __percpu *newstats) |
| 1148 | { |
Pablo Neira Ayuso | b88825d | 2014-08-05 17:25:59 +0200 | [diff] [blame] | 1149 | if (newstats == NULL) |
| 1150 | return; |
| 1151 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1152 | if (chain->stats) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1153 | struct nft_stats __percpu *oldstats = |
Patrick McHardy | 67a8fc2 | 2014-02-18 18:06:49 +0000 | [diff] [blame] | 1154 | nft_dereference(chain->stats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1155 | |
| 1156 | rcu_assign_pointer(chain->stats, newstats); |
| 1157 | synchronize_rcu(); |
| 1158 | free_percpu(oldstats); |
| 1159 | } else |
| 1160 | rcu_assign_pointer(chain->stats, newstats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1161 | } |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1162 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1163 | static void nf_tables_chain_destroy(struct nft_chain *chain) |
| 1164 | { |
| 1165 | BUG_ON(chain->use > 0); |
| 1166 | |
| 1167 | if (chain->flags & NFT_BASE_CHAIN) { |
| 1168 | module_put(nft_base_chain(chain)->type->owner); |
| 1169 | free_percpu(nft_base_chain(chain)->stats); |
| 1170 | kfree(nft_base_chain(chain)); |
| 1171 | } else { |
| 1172 | kfree(chain); |
| 1173 | } |
| 1174 | } |
| 1175 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1176 | static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb, |
| 1177 | const struct nlmsghdr *nlh, |
| 1178 | const struct nlattr * const nla[]) |
| 1179 | { |
| 1180 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 1181 | const struct nlattr * uninitialized_var(name); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 1182 | struct nft_af_info *afi; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1183 | struct nft_table *table; |
| 1184 | struct nft_chain *chain; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1185 | struct nft_base_chain *basechain = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1186 | struct nlattr *ha[NFTA_HOOK_MAX + 1]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1187 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1188 | int family = nfmsg->nfgen_family; |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1189 | u8 policy = NF_ACCEPT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1190 | u64 handle = 0; |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1191 | unsigned int i; |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1192 | struct nft_stats __percpu *stats; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1193 | int err; |
| 1194 | bool create; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1195 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1196 | |
| 1197 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
| 1198 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1199 | afi = nf_tables_afinfo_lookup(net, family, true); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1200 | if (IS_ERR(afi)) |
| 1201 | return PTR_ERR(afi); |
| 1202 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1203 | table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1204 | if (IS_ERR(table)) |
| 1205 | return PTR_ERR(table); |
| 1206 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1207 | chain = NULL; |
| 1208 | name = nla[NFTA_CHAIN_NAME]; |
| 1209 | |
| 1210 | if (nla[NFTA_CHAIN_HANDLE]) { |
| 1211 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE])); |
| 1212 | chain = nf_tables_chain_lookup_byhandle(table, handle); |
| 1213 | if (IS_ERR(chain)) |
| 1214 | return PTR_ERR(chain); |
| 1215 | } else { |
| 1216 | chain = nf_tables_chain_lookup(table, name); |
| 1217 | if (IS_ERR(chain)) { |
| 1218 | if (PTR_ERR(chain) != -ENOENT) |
| 1219 | return PTR_ERR(chain); |
| 1220 | chain = NULL; |
| 1221 | } |
| 1222 | } |
| 1223 | |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1224 | if (nla[NFTA_CHAIN_POLICY]) { |
| 1225 | if ((chain != NULL && |
Pablo Neira Ayuso | d6b6cb1 | 2015-03-17 13:21:42 +0100 | [diff] [blame] | 1226 | !(chain->flags & NFT_BASE_CHAIN))) |
| 1227 | return -EOPNOTSUPP; |
| 1228 | |
| 1229 | if (chain == NULL && |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1230 | nla[NFTA_CHAIN_HOOK] == NULL) |
| 1231 | return -EOPNOTSUPP; |
| 1232 | |
Pablo Neira Ayuso | 8f46df1 | 2014-01-10 15:11:25 +0100 | [diff] [blame] | 1233 | policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY])); |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1234 | switch (policy) { |
| 1235 | case NF_DROP: |
| 1236 | case NF_ACCEPT: |
| 1237 | break; |
| 1238 | default: |
| 1239 | return -EINVAL; |
| 1240 | } |
| 1241 | } |
| 1242 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1243 | if (chain != NULL) { |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1244 | struct nft_stats *stats = NULL; |
| 1245 | struct nft_trans *trans; |
| 1246 | |
| 1247 | if (chain->flags & NFT_CHAIN_INACTIVE) |
| 1248 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1249 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 1250 | return -EEXIST; |
| 1251 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 1252 | return -EOPNOTSUPP; |
| 1253 | |
| 1254 | if (nla[NFTA_CHAIN_HANDLE] && name && |
| 1255 | !IS_ERR(nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME]))) |
| 1256 | return -EEXIST; |
| 1257 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1258 | if (nla[NFTA_CHAIN_COUNTERS]) { |
| 1259 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 1260 | return -EOPNOTSUPP; |
| 1261 | |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1262 | stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); |
| 1263 | if (IS_ERR(stats)) |
| 1264 | return PTR_ERR(stats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1265 | } |
| 1266 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1267 | nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla); |
| 1268 | trans = nft_trans_alloc(&ctx, NFT_MSG_NEWCHAIN, |
| 1269 | sizeof(struct nft_trans_chain)); |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1270 | if (trans == NULL) { |
| 1271 | free_percpu(stats); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1272 | return -ENOMEM; |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1273 | } |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1274 | |
| 1275 | nft_trans_chain_stats(trans) = stats; |
| 1276 | nft_trans_chain_update(trans) = true; |
| 1277 | |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1278 | if (nla[NFTA_CHAIN_POLICY]) |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1279 | nft_trans_chain_policy(trans) = policy; |
| 1280 | else |
| 1281 | nft_trans_chain_policy(trans) = -1; |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1282 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1283 | if (nla[NFTA_CHAIN_HANDLE] && name) { |
| 1284 | nla_strlcpy(nft_trans_chain_name(trans), name, |
| 1285 | NFT_CHAIN_MAXNAMELEN); |
| 1286 | } |
| 1287 | list_add_tail(&trans->list, &net->nft.commit_list); |
| 1288 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1289 | } |
| 1290 | |
Patrick McHardy | 7582067 | 2014-01-09 18:42:33 +0000 | [diff] [blame] | 1291 | if (table->use == UINT_MAX) |
| 1292 | return -EOVERFLOW; |
| 1293 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1294 | if (nla[NFTA_CHAIN_HOOK]) { |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 1295 | const struct nf_chain_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1296 | struct nf_hook_ops *ops; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1297 | nf_hookfn *hookfn; |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1298 | u32 hooknum, priority; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1299 | |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 1300 | type = chain_type[family][NFT_CHAIN_T_DEFAULT]; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1301 | if (nla[NFTA_CHAIN_TYPE]) { |
| 1302 | type = nf_tables_chain_type_lookup(afi, |
| 1303 | nla[NFTA_CHAIN_TYPE], |
| 1304 | create); |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 1305 | if (IS_ERR(type)) |
| 1306 | return PTR_ERR(type); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1307 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1308 | |
| 1309 | err = nla_parse_nested(ha, NFTA_HOOK_MAX, nla[NFTA_CHAIN_HOOK], |
| 1310 | nft_hook_policy); |
| 1311 | if (err < 0) |
| 1312 | return err; |
| 1313 | if (ha[NFTA_HOOK_HOOKNUM] == NULL || |
| 1314 | ha[NFTA_HOOK_PRIORITY] == NULL) |
| 1315 | return -EINVAL; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1316 | |
| 1317 | hooknum = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM])); |
| 1318 | if (hooknum >= afi->nhooks) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1319 | return -EINVAL; |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1320 | priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY])); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1321 | |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 1322 | if (!(type->hook_mask & (1 << hooknum))) |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1323 | return -EOPNOTSUPP; |
Patrick McHardy | fa2c1de | 2014-01-09 18:42:38 +0000 | [diff] [blame] | 1324 | if (!try_module_get(type->owner)) |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 1325 | return -ENOENT; |
Patrick McHardy | fa2c1de | 2014-01-09 18:42:38 +0000 | [diff] [blame] | 1326 | hookfn = type->hooks[hooknum]; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1327 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1328 | basechain = kzalloc(sizeof(*basechain), GFP_KERNEL); |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1329 | if (basechain == NULL) { |
| 1330 | module_put(type->owner); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1331 | return -ENOMEM; |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1332 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1333 | |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1334 | if (nla[NFTA_CHAIN_COUNTERS]) { |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1335 | stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); |
| 1336 | if (IS_ERR(stats)) { |
Patrick McHardy | fa2c1de | 2014-01-09 18:42:38 +0000 | [diff] [blame] | 1337 | module_put(type->owner); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1338 | kfree(basechain); |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1339 | return PTR_ERR(stats); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1340 | } |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1341 | basechain->stats = stats; |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1342 | } else { |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 1343 | stats = netdev_alloc_pcpu_stats(struct nft_stats); |
Sabrina Dubroca | c123bb7 | 2014-10-21 11:08:21 +0200 | [diff] [blame] | 1344 | if (stats == NULL) { |
Patrick McHardy | fa2c1de | 2014-01-09 18:42:38 +0000 | [diff] [blame] | 1345 | module_put(type->owner); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1346 | kfree(basechain); |
Sabrina Dubroca | c123bb7 | 2014-10-21 11:08:21 +0200 | [diff] [blame] | 1347 | return -ENOMEM; |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1348 | } |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1349 | rcu_assign_pointer(basechain->stats, stats); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1350 | } |
| 1351 | |
Patrick McHardy | 5ebb335 | 2015-03-21 15:19:15 +0000 | [diff] [blame] | 1352 | write_pnet(&basechain->pnet, net); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1353 | basechain->type = type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1354 | chain = &basechain->chain; |
| 1355 | |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1356 | for (i = 0; i < afi->nops; i++) { |
| 1357 | ops = &basechain->ops[i]; |
| 1358 | ops->pf = family; |
| 1359 | ops->owner = afi->owner; |
| 1360 | ops->hooknum = hooknum; |
| 1361 | ops->priority = priority; |
| 1362 | ops->priv = chain; |
| 1363 | ops->hook = afi->hooks[ops->hooknum]; |
| 1364 | if (hookfn) |
| 1365 | ops->hook = hookfn; |
| 1366 | if (afi->hook_ops_init) |
| 1367 | afi->hook_ops_init(ops, i); |
| 1368 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1369 | |
| 1370 | chain->flags |= NFT_BASE_CHAIN; |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1371 | basechain->policy = policy; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1372 | } else { |
| 1373 | chain = kzalloc(sizeof(*chain), GFP_KERNEL); |
| 1374 | if (chain == NULL) |
| 1375 | return -ENOMEM; |
| 1376 | } |
| 1377 | |
| 1378 | INIT_LIST_HEAD(&chain->rules); |
| 1379 | chain->handle = nf_tables_alloc_handle(table); |
Pablo Neira Ayuso | b5bc89b | 2013-10-10 16:49:19 +0200 | [diff] [blame] | 1380 | chain->table = table; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1381 | nla_strlcpy(chain->name, name, NFT_CHAIN_MAXNAMELEN); |
| 1382 | |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 1383 | if (!(table->flags & NFT_TABLE_F_DORMANT) && |
| 1384 | chain->flags & NFT_BASE_CHAIN) { |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1385 | err = nf_register_hooks(nft_base_chain(chain)->ops, afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1386 | if (err < 0) |
| 1387 | goto err1; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1388 | } |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1389 | |
| 1390 | nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla); |
| 1391 | err = nft_trans_chain_add(&ctx, NFT_MSG_NEWCHAIN); |
| 1392 | if (err < 0) |
| 1393 | goto err2; |
| 1394 | |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 1395 | table->use++; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1396 | list_add_tail_rcu(&chain->list, &table->chains); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1397 | return 0; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1398 | err2: |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 1399 | nf_tables_unregister_hooks(table, chain, afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1400 | err1: |
| 1401 | nf_tables_chain_destroy(chain); |
| 1402 | return err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1403 | } |
| 1404 | |
| 1405 | static int nf_tables_delchain(struct sock *nlsk, struct sk_buff *skb, |
| 1406 | const struct nlmsghdr *nlh, |
| 1407 | const struct nlattr * const nla[]) |
| 1408 | { |
| 1409 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 1410 | struct nft_af_info *afi; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1411 | struct nft_table *table; |
| 1412 | struct nft_chain *chain; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1413 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1414 | int family = nfmsg->nfgen_family; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1415 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1416 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1417 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1418 | if (IS_ERR(afi)) |
| 1419 | return PTR_ERR(afi); |
| 1420 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1421 | table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1422 | if (IS_ERR(table)) |
| 1423 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 1424 | if (table->flags & NFT_TABLE_INACTIVE) |
| 1425 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1426 | |
| 1427 | chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME]); |
| 1428 | if (IS_ERR(chain)) |
| 1429 | return PTR_ERR(chain); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1430 | if (chain->flags & NFT_CHAIN_INACTIVE) |
| 1431 | return -ENOENT; |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 1432 | if (chain->use > 0) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1433 | return -EBUSY; |
| 1434 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1435 | nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1436 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 1437 | return nft_delchain(&ctx); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1438 | } |
| 1439 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1440 | /* |
| 1441 | * Expressions |
| 1442 | */ |
| 1443 | |
| 1444 | /** |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1445 | * nft_register_expr - register nf_tables expr type |
| 1446 | * @ops: expr type |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1447 | * |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1448 | * Registers the expr type for use with nf_tables. Returns zero on |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1449 | * success or a negative errno code otherwise. |
| 1450 | */ |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1451 | int nft_register_expr(struct nft_expr_type *type) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1452 | { |
| 1453 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Tomasz Bursztyka | 758dbce | 2014-04-14 15:41:26 +0300 | [diff] [blame] | 1454 | if (type->family == NFPROTO_UNSPEC) |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1455 | list_add_tail_rcu(&type->list, &nf_tables_expressions); |
Tomasz Bursztyka | 758dbce | 2014-04-14 15:41:26 +0300 | [diff] [blame] | 1456 | else |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1457 | list_add_rcu(&type->list, &nf_tables_expressions); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1458 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 1459 | return 0; |
| 1460 | } |
| 1461 | EXPORT_SYMBOL_GPL(nft_register_expr); |
| 1462 | |
| 1463 | /** |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1464 | * nft_unregister_expr - unregister nf_tables expr type |
| 1465 | * @ops: expr type |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1466 | * |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1467 | * Unregisters the expr typefor use with nf_tables. |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1468 | */ |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1469 | void nft_unregister_expr(struct nft_expr_type *type) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1470 | { |
| 1471 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1472 | list_del_rcu(&type->list); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1473 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 1474 | } |
| 1475 | EXPORT_SYMBOL_GPL(nft_unregister_expr); |
| 1476 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1477 | static const struct nft_expr_type *__nft_expr_type_get(u8 family, |
| 1478 | struct nlattr *nla) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1479 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1480 | const struct nft_expr_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1481 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1482 | list_for_each_entry(type, &nf_tables_expressions, list) { |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1483 | if (!nla_strcmp(nla, type->name) && |
| 1484 | (!type->family || type->family == family)) |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1485 | return type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1486 | } |
| 1487 | return NULL; |
| 1488 | } |
| 1489 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1490 | static const struct nft_expr_type *nft_expr_type_get(u8 family, |
| 1491 | struct nlattr *nla) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1492 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1493 | const struct nft_expr_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1494 | |
| 1495 | if (nla == NULL) |
| 1496 | return ERR_PTR(-EINVAL); |
| 1497 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1498 | type = __nft_expr_type_get(family, nla); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1499 | if (type != NULL && try_module_get(type->owner)) |
| 1500 | return type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1501 | |
| 1502 | #ifdef CONFIG_MODULES |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1503 | if (type == NULL) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1504 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1505 | request_module("nft-expr-%u-%.*s", family, |
| 1506 | nla_len(nla), (char *)nla_data(nla)); |
| 1507 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
| 1508 | if (__nft_expr_type_get(family, nla)) |
| 1509 | return ERR_PTR(-EAGAIN); |
| 1510 | |
| 1511 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1512 | request_module("nft-expr-%.*s", |
| 1513 | nla_len(nla), (char *)nla_data(nla)); |
| 1514 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1515 | if (__nft_expr_type_get(family, nla)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1516 | return ERR_PTR(-EAGAIN); |
| 1517 | } |
| 1518 | #endif |
| 1519 | return ERR_PTR(-ENOENT); |
| 1520 | } |
| 1521 | |
| 1522 | static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = { |
| 1523 | [NFTA_EXPR_NAME] = { .type = NLA_STRING }, |
| 1524 | [NFTA_EXPR_DATA] = { .type = NLA_NESTED }, |
| 1525 | }; |
| 1526 | |
| 1527 | static int nf_tables_fill_expr_info(struct sk_buff *skb, |
| 1528 | const struct nft_expr *expr) |
| 1529 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1530 | if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1531 | goto nla_put_failure; |
| 1532 | |
| 1533 | if (expr->ops->dump) { |
| 1534 | struct nlattr *data = nla_nest_start(skb, NFTA_EXPR_DATA); |
| 1535 | if (data == NULL) |
| 1536 | goto nla_put_failure; |
| 1537 | if (expr->ops->dump(skb, expr) < 0) |
| 1538 | goto nla_put_failure; |
| 1539 | nla_nest_end(skb, data); |
| 1540 | } |
| 1541 | |
| 1542 | return skb->len; |
| 1543 | |
| 1544 | nla_put_failure: |
| 1545 | return -1; |
| 1546 | }; |
| 1547 | |
| 1548 | struct nft_expr_info { |
| 1549 | const struct nft_expr_ops *ops; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1550 | struct nlattr *tb[NFT_EXPR_MAXATTR + 1]; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1551 | }; |
| 1552 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1553 | static int nf_tables_expr_parse(const struct nft_ctx *ctx, |
| 1554 | const struct nlattr *nla, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1555 | struct nft_expr_info *info) |
| 1556 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1557 | const struct nft_expr_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1558 | const struct nft_expr_ops *ops; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1559 | struct nlattr *tb[NFTA_EXPR_MAX + 1]; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1560 | int err; |
| 1561 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1562 | err = nla_parse_nested(tb, NFTA_EXPR_MAX, nla, nft_expr_policy); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1563 | if (err < 0) |
| 1564 | return err; |
| 1565 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1566 | type = nft_expr_type_get(ctx->afi->family, tb[NFTA_EXPR_NAME]); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1567 | if (IS_ERR(type)) |
| 1568 | return PTR_ERR(type); |
| 1569 | |
| 1570 | if (tb[NFTA_EXPR_DATA]) { |
| 1571 | err = nla_parse_nested(info->tb, type->maxattr, |
| 1572 | tb[NFTA_EXPR_DATA], type->policy); |
| 1573 | if (err < 0) |
| 1574 | goto err1; |
| 1575 | } else |
| 1576 | memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1)); |
| 1577 | |
| 1578 | if (type->select_ops != NULL) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1579 | ops = type->select_ops(ctx, |
| 1580 | (const struct nlattr * const *)info->tb); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1581 | if (IS_ERR(ops)) { |
| 1582 | err = PTR_ERR(ops); |
| 1583 | goto err1; |
| 1584 | } |
| 1585 | } else |
| 1586 | ops = type->ops; |
| 1587 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1588 | info->ops = ops; |
| 1589 | return 0; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1590 | |
| 1591 | err1: |
| 1592 | module_put(type->owner); |
| 1593 | return err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | static int nf_tables_newexpr(const struct nft_ctx *ctx, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1597 | const struct nft_expr_info *info, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1598 | struct nft_expr *expr) |
| 1599 | { |
| 1600 | const struct nft_expr_ops *ops = info->ops; |
| 1601 | int err; |
| 1602 | |
| 1603 | expr->ops = ops; |
| 1604 | if (ops->init) { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1605 | err = ops->init(ctx, expr, (const struct nlattr **)info->tb); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1606 | if (err < 0) |
| 1607 | goto err1; |
| 1608 | } |
| 1609 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1610 | return 0; |
| 1611 | |
| 1612 | err1: |
| 1613 | expr->ops = NULL; |
| 1614 | return err; |
| 1615 | } |
| 1616 | |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 1617 | static void nf_tables_expr_destroy(const struct nft_ctx *ctx, |
| 1618 | struct nft_expr *expr) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1619 | { |
| 1620 | if (expr->ops->destroy) |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 1621 | expr->ops->destroy(ctx, expr); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1622 | module_put(expr->ops->type->owner); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1623 | } |
| 1624 | |
| 1625 | /* |
| 1626 | * Rules |
| 1627 | */ |
| 1628 | |
| 1629 | static struct nft_rule *__nf_tables_rule_lookup(const struct nft_chain *chain, |
| 1630 | u64 handle) |
| 1631 | { |
| 1632 | struct nft_rule *rule; |
| 1633 | |
| 1634 | // FIXME: this sucks |
| 1635 | list_for_each_entry(rule, &chain->rules, list) { |
| 1636 | if (handle == rule->handle) |
| 1637 | return rule; |
| 1638 | } |
| 1639 | |
| 1640 | return ERR_PTR(-ENOENT); |
| 1641 | } |
| 1642 | |
| 1643 | static struct nft_rule *nf_tables_rule_lookup(const struct nft_chain *chain, |
| 1644 | const struct nlattr *nla) |
| 1645 | { |
| 1646 | if (nla == NULL) |
| 1647 | return ERR_PTR(-EINVAL); |
| 1648 | |
| 1649 | return __nf_tables_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla))); |
| 1650 | } |
| 1651 | |
| 1652 | static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = { |
| 1653 | [NFTA_RULE_TABLE] = { .type = NLA_STRING }, |
| 1654 | [NFTA_RULE_CHAIN] = { .type = NLA_STRING, |
| 1655 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, |
| 1656 | [NFTA_RULE_HANDLE] = { .type = NLA_U64 }, |
| 1657 | [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1658 | [NFTA_RULE_COMPAT] = { .type = NLA_NESTED }, |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1659 | [NFTA_RULE_POSITION] = { .type = NLA_U64 }, |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1660 | [NFTA_RULE_USERDATA] = { .type = NLA_BINARY, |
| 1661 | .len = NFT_USERDATA_MAXLEN }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1662 | }; |
| 1663 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1664 | static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net, |
| 1665 | u32 portid, u32 seq, int event, |
| 1666 | u32 flags, int family, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1667 | const struct nft_table *table, |
| 1668 | const struct nft_chain *chain, |
| 1669 | const struct nft_rule *rule) |
| 1670 | { |
| 1671 | struct nlmsghdr *nlh; |
| 1672 | struct nfgenmsg *nfmsg; |
| 1673 | const struct nft_expr *expr, *next; |
| 1674 | struct nlattr *list; |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1675 | const struct nft_rule *prule; |
| 1676 | int type = event | NFNL_SUBSYS_NFTABLES << 8; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1677 | |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1678 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1679 | flags); |
| 1680 | if (nlh == NULL) |
| 1681 | goto nla_put_failure; |
| 1682 | |
| 1683 | nfmsg = nlmsg_data(nlh); |
| 1684 | nfmsg->nfgen_family = family; |
| 1685 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1686 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1687 | |
| 1688 | if (nla_put_string(skb, NFTA_RULE_TABLE, table->name)) |
| 1689 | goto nla_put_failure; |
| 1690 | if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name)) |
| 1691 | goto nla_put_failure; |
| 1692 | if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle))) |
| 1693 | goto nla_put_failure; |
| 1694 | |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1695 | if ((event != NFT_MSG_DELRULE) && (rule->list.prev != &chain->rules)) { |
| 1696 | prule = list_entry(rule->list.prev, struct nft_rule, list); |
| 1697 | if (nla_put_be64(skb, NFTA_RULE_POSITION, |
| 1698 | cpu_to_be64(prule->handle))) |
| 1699 | goto nla_put_failure; |
| 1700 | } |
| 1701 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1702 | list = nla_nest_start(skb, NFTA_RULE_EXPRESSIONS); |
| 1703 | if (list == NULL) |
| 1704 | goto nla_put_failure; |
| 1705 | nft_rule_for_each_expr(expr, next, rule) { |
| 1706 | struct nlattr *elem = nla_nest_start(skb, NFTA_LIST_ELEM); |
| 1707 | if (elem == NULL) |
| 1708 | goto nla_put_failure; |
| 1709 | if (nf_tables_fill_expr_info(skb, expr) < 0) |
| 1710 | goto nla_put_failure; |
| 1711 | nla_nest_end(skb, elem); |
| 1712 | } |
| 1713 | nla_nest_end(skb, list); |
| 1714 | |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1715 | if (rule->udata) { |
| 1716 | struct nft_userdata *udata = nft_userdata(rule); |
| 1717 | if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1, |
| 1718 | udata->data) < 0) |
| 1719 | goto nla_put_failure; |
| 1720 | } |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1721 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1722 | nlmsg_end(skb, nlh); |
| 1723 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1724 | |
| 1725 | nla_put_failure: |
| 1726 | nlmsg_trim(skb, nlh); |
| 1727 | return -1; |
| 1728 | } |
| 1729 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1730 | static int nf_tables_rule_notify(const struct nft_ctx *ctx, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1731 | const struct nft_rule *rule, |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1732 | int event) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1733 | { |
| 1734 | struct sk_buff *skb; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1735 | int err; |
| 1736 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1737 | if (!ctx->report && |
| 1738 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1739 | return 0; |
| 1740 | |
| 1741 | err = -ENOBUFS; |
| 1742 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1743 | if (skb == NULL) |
| 1744 | goto err; |
| 1745 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1746 | err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq, |
| 1747 | event, 0, ctx->afi->family, ctx->table, |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1748 | ctx->chain, rule); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1749 | if (err < 0) { |
| 1750 | kfree_skb(skb); |
| 1751 | goto err; |
| 1752 | } |
| 1753 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1754 | err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1755 | ctx->report, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1756 | err: |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1757 | if (err < 0) { |
| 1758 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1759 | err); |
| 1760 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1761 | return err; |
| 1762 | } |
| 1763 | |
| 1764 | static int nf_tables_dump_rules(struct sk_buff *skb, |
| 1765 | struct netlink_callback *cb) |
| 1766 | { |
| 1767 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 1768 | const struct nft_af_info *afi; |
| 1769 | const struct nft_table *table; |
| 1770 | const struct nft_chain *chain; |
| 1771 | const struct nft_rule *rule; |
| 1772 | unsigned int idx = 0, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1773 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1774 | int family = nfmsg->nfgen_family; |
| 1775 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1776 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1777 | cb->seq = net->nft.base_seq; |
| 1778 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1779 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1780 | if (family != NFPROTO_UNSPEC && family != afi->family) |
| 1781 | continue; |
| 1782 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1783 | list_for_each_entry_rcu(table, &afi->tables, list) { |
| 1784 | list_for_each_entry_rcu(chain, &table->chains, list) { |
| 1785 | list_for_each_entry_rcu(rule, &chain->rules, list) { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 1786 | if (!nft_rule_is_active(net, rule)) |
| 1787 | goto cont; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1788 | if (idx < s_idx) |
| 1789 | goto cont; |
| 1790 | if (idx > s_idx) |
| 1791 | memset(&cb->args[1], 0, |
| 1792 | sizeof(cb->args) - sizeof(cb->args[0])); |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1793 | if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1794 | cb->nlh->nlmsg_seq, |
| 1795 | NFT_MSG_NEWRULE, |
| 1796 | NLM_F_MULTI | NLM_F_APPEND, |
| 1797 | afi->family, table, chain, rule) < 0) |
| 1798 | goto done; |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1799 | |
| 1800 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1801 | cont: |
| 1802 | idx++; |
| 1803 | } |
| 1804 | } |
| 1805 | } |
| 1806 | } |
| 1807 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1808 | rcu_read_unlock(); |
| 1809 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1810 | cb->args[0] = idx; |
| 1811 | return skb->len; |
| 1812 | } |
| 1813 | |
| 1814 | static int nf_tables_getrule(struct sock *nlsk, struct sk_buff *skb, |
| 1815 | const struct nlmsghdr *nlh, |
| 1816 | const struct nlattr * const nla[]) |
| 1817 | { |
| 1818 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 1819 | const struct nft_af_info *afi; |
| 1820 | const struct nft_table *table; |
| 1821 | const struct nft_chain *chain; |
| 1822 | const struct nft_rule *rule; |
| 1823 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1824 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1825 | int family = nfmsg->nfgen_family; |
| 1826 | int err; |
| 1827 | |
| 1828 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1829 | struct netlink_dump_control c = { |
| 1830 | .dump = nf_tables_dump_rules, |
| 1831 | }; |
| 1832 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 1833 | } |
| 1834 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1835 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1836 | if (IS_ERR(afi)) |
| 1837 | return PTR_ERR(afi); |
| 1838 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1839 | table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1840 | if (IS_ERR(table)) |
| 1841 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 1842 | if (table->flags & NFT_TABLE_INACTIVE) |
| 1843 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1844 | |
| 1845 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN]); |
| 1846 | if (IS_ERR(chain)) |
| 1847 | return PTR_ERR(chain); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1848 | if (chain->flags & NFT_CHAIN_INACTIVE) |
| 1849 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1850 | |
| 1851 | rule = nf_tables_rule_lookup(chain, nla[NFTA_RULE_HANDLE]); |
| 1852 | if (IS_ERR(rule)) |
| 1853 | return PTR_ERR(rule); |
| 1854 | |
| 1855 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1856 | if (!skb2) |
| 1857 | return -ENOMEM; |
| 1858 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1859 | err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1860 | nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0, |
| 1861 | family, table, chain, rule); |
| 1862 | if (err < 0) |
| 1863 | goto err; |
| 1864 | |
| 1865 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 1866 | |
| 1867 | err: |
| 1868 | kfree_skb(skb2); |
| 1869 | return err; |
| 1870 | } |
| 1871 | |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 1872 | static void nf_tables_rule_destroy(const struct nft_ctx *ctx, |
| 1873 | struct nft_rule *rule) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1874 | { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1875 | struct nft_expr *expr; |
| 1876 | |
| 1877 | /* |
| 1878 | * Careful: some expressions might not be initialized in case this |
| 1879 | * is called on error from nf_tables_newrule(). |
| 1880 | */ |
| 1881 | expr = nft_expr_first(rule); |
| 1882 | while (expr->ops && expr != nft_expr_last(rule)) { |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 1883 | nf_tables_expr_destroy(ctx, expr); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1884 | expr = nft_expr_next(expr); |
| 1885 | } |
| 1886 | kfree(rule); |
| 1887 | } |
| 1888 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1889 | #define NFT_RULE_MAXEXPRS 128 |
| 1890 | |
| 1891 | static struct nft_expr_info *info; |
| 1892 | |
| 1893 | static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb, |
| 1894 | const struct nlmsghdr *nlh, |
| 1895 | const struct nlattr * const nla[]) |
| 1896 | { |
| 1897 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 1898 | struct nft_af_info *afi; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1899 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1900 | struct nft_table *table; |
| 1901 | struct nft_chain *chain; |
| 1902 | struct nft_rule *rule, *old_rule = NULL; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1903 | struct nft_userdata *udata; |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 1904 | struct nft_trans *trans = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1905 | struct nft_expr *expr; |
| 1906 | struct nft_ctx ctx; |
| 1907 | struct nlattr *tmp; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1908 | unsigned int size, i, n, ulen = 0, usize = 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1909 | int err, rem; |
| 1910 | bool create; |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1911 | u64 handle, pos_handle; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1912 | |
| 1913 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
| 1914 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1915 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, create); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1916 | if (IS_ERR(afi)) |
| 1917 | return PTR_ERR(afi); |
| 1918 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1919 | table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1920 | if (IS_ERR(table)) |
| 1921 | return PTR_ERR(table); |
| 1922 | |
| 1923 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN]); |
| 1924 | if (IS_ERR(chain)) |
| 1925 | return PTR_ERR(chain); |
| 1926 | |
| 1927 | if (nla[NFTA_RULE_HANDLE]) { |
| 1928 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE])); |
| 1929 | rule = __nf_tables_rule_lookup(chain, handle); |
| 1930 | if (IS_ERR(rule)) |
| 1931 | return PTR_ERR(rule); |
| 1932 | |
| 1933 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 1934 | return -EEXIST; |
| 1935 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 1936 | old_rule = rule; |
| 1937 | else |
| 1938 | return -EOPNOTSUPP; |
| 1939 | } else { |
| 1940 | if (!create || nlh->nlmsg_flags & NLM_F_REPLACE) |
| 1941 | return -EINVAL; |
| 1942 | handle = nf_tables_alloc_handle(table); |
Pablo Neira Ayuso | a0a7379 | 2014-06-10 10:53:01 +0200 | [diff] [blame] | 1943 | |
| 1944 | if (chain->use == UINT_MAX) |
| 1945 | return -EOVERFLOW; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1946 | } |
| 1947 | |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1948 | if (nla[NFTA_RULE_POSITION]) { |
| 1949 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) |
| 1950 | return -EOPNOTSUPP; |
| 1951 | |
| 1952 | pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION])); |
| 1953 | old_rule = __nf_tables_rule_lookup(chain, pos_handle); |
| 1954 | if (IS_ERR(old_rule)) |
| 1955 | return PTR_ERR(old_rule); |
| 1956 | } |
| 1957 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1958 | nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla); |
| 1959 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1960 | n = 0; |
| 1961 | size = 0; |
| 1962 | if (nla[NFTA_RULE_EXPRESSIONS]) { |
| 1963 | nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) { |
| 1964 | err = -EINVAL; |
| 1965 | if (nla_type(tmp) != NFTA_LIST_ELEM) |
| 1966 | goto err1; |
| 1967 | if (n == NFT_RULE_MAXEXPRS) |
| 1968 | goto err1; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1969 | err = nf_tables_expr_parse(&ctx, tmp, &info[n]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1970 | if (err < 0) |
| 1971 | goto err1; |
| 1972 | size += info[n].ops->size; |
| 1973 | n++; |
| 1974 | } |
| 1975 | } |
Patrick McHardy | 9889840 | 2015-03-03 20:04:19 +0000 | [diff] [blame] | 1976 | /* Check for overflow of dlen field */ |
| 1977 | err = -EFBIG; |
| 1978 | if (size >= 1 << 12) |
| 1979 | goto err1; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1980 | |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1981 | if (nla[NFTA_RULE_USERDATA]) { |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1982 | ulen = nla_len(nla[NFTA_RULE_USERDATA]); |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1983 | if (ulen > 0) |
| 1984 | usize = sizeof(struct nft_userdata) + ulen; |
| 1985 | } |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1986 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1987 | err = -ENOMEM; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1988 | rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1989 | if (rule == NULL) |
| 1990 | goto err1; |
| 1991 | |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 1992 | nft_rule_activate_next(net, rule); |
| 1993 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1994 | rule->handle = handle; |
| 1995 | rule->dlen = size; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1996 | rule->udata = ulen ? 1 : 0; |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1997 | |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1998 | if (ulen) { |
| 1999 | udata = nft_userdata(rule); |
| 2000 | udata->len = ulen - 1; |
| 2001 | nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen); |
| 2002 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2003 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2004 | expr = nft_expr_first(rule); |
| 2005 | for (i = 0; i < n; i++) { |
| 2006 | err = nf_tables_newexpr(&ctx, &info[i], expr); |
| 2007 | if (err < 0) |
| 2008 | goto err2; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 2009 | info[i].ops = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2010 | expr = nft_expr_next(expr); |
| 2011 | } |
| 2012 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2013 | if (nlh->nlmsg_flags & NLM_F_REPLACE) { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2014 | if (nft_rule_is_active_next(net, old_rule)) { |
Pablo Neira Ayuso | ac904ac | 2014-06-10 10:53:03 +0200 | [diff] [blame] | 2015 | trans = nft_trans_rule_add(&ctx, NFT_MSG_DELRULE, |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 2016 | old_rule); |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 2017 | if (trans == NULL) { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2018 | err = -ENOMEM; |
| 2019 | goto err2; |
| 2020 | } |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 2021 | nft_rule_deactivate_next(net, old_rule); |
Pablo Neira Ayuso | ac34b86 | 2014-06-10 10:53:02 +0200 | [diff] [blame] | 2022 | chain->use--; |
Pablo Neira Ayuso | 5bc5c30 | 2014-06-10 10:53:00 +0200 | [diff] [blame] | 2023 | list_add_tail_rcu(&rule->list, &old_rule->list); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2024 | } else { |
| 2025 | err = -ENOENT; |
| 2026 | goto err2; |
| 2027 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2028 | } else if (nlh->nlmsg_flags & NLM_F_APPEND) |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 2029 | if (old_rule) |
| 2030 | list_add_rcu(&rule->list, &old_rule->list); |
| 2031 | else |
| 2032 | list_add_tail_rcu(&rule->list, &chain->rules); |
| 2033 | else { |
| 2034 | if (old_rule) |
| 2035 | list_add_tail_rcu(&rule->list, &old_rule->list); |
| 2036 | else |
| 2037 | list_add_rcu(&rule->list, &chain->rules); |
| 2038 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2039 | |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 2040 | if (nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule) == NULL) { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2041 | err = -ENOMEM; |
| 2042 | goto err3; |
| 2043 | } |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 2044 | chain->use++; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2045 | return 0; |
| 2046 | |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2047 | err3: |
| 2048 | list_del_rcu(&rule->list); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2049 | err2: |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 2050 | nf_tables_rule_destroy(&ctx, rule); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2051 | err1: |
| 2052 | for (i = 0; i < n; i++) { |
| 2053 | if (info[i].ops != NULL) |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 2054 | module_put(info[i].ops->type->owner); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2055 | } |
| 2056 | return err; |
| 2057 | } |
| 2058 | |
| 2059 | static int nf_tables_delrule(struct sock *nlsk, struct sk_buff *skb, |
| 2060 | const struct nlmsghdr *nlh, |
| 2061 | const struct nlattr * const nla[]) |
| 2062 | { |
| 2063 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2064 | struct nft_af_info *afi; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2065 | struct net *net = sock_net(skb->sk); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2066 | struct nft_table *table; |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2067 | struct nft_chain *chain = NULL; |
| 2068 | struct nft_rule *rule; |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2069 | int family = nfmsg->nfgen_family, err = 0; |
| 2070 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2071 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2072 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2073 | if (IS_ERR(afi)) |
| 2074 | return PTR_ERR(afi); |
| 2075 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 2076 | table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2077 | if (IS_ERR(table)) |
| 2078 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 2079 | if (table->flags & NFT_TABLE_INACTIVE) |
| 2080 | return -ENOENT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2081 | |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2082 | if (nla[NFTA_RULE_CHAIN]) { |
| 2083 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN]); |
| 2084 | if (IS_ERR(chain)) |
| 2085 | return PTR_ERR(chain); |
| 2086 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2087 | |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2088 | nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla); |
| 2089 | |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2090 | if (chain) { |
| 2091 | if (nla[NFTA_RULE_HANDLE]) { |
| 2092 | rule = nf_tables_rule_lookup(chain, |
| 2093 | nla[NFTA_RULE_HANDLE]); |
| 2094 | if (IS_ERR(rule)) |
| 2095 | return PTR_ERR(rule); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2096 | |
Arturo Borrero | 5e266fe | 2014-09-02 16:42:21 +0200 | [diff] [blame] | 2097 | err = nft_delrule(&ctx, rule); |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2098 | } else { |
Arturo Borrero | ce24b72 | 2014-09-02 16:42:24 +0200 | [diff] [blame] | 2099 | err = nft_delrule_by_chain(&ctx); |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2100 | } |
| 2101 | } else { |
| 2102 | list_for_each_entry(chain, &table->chains, list) { |
| 2103 | ctx.chain = chain; |
Arturo Borrero | ce24b72 | 2014-09-02 16:42:24 +0200 | [diff] [blame] | 2104 | err = nft_delrule_by_chain(&ctx); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2105 | if (err < 0) |
| 2106 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2107 | } |
| 2108 | } |
| 2109 | |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2110 | return err; |
| 2111 | } |
| 2112 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2113 | /* |
| 2114 | * Sets |
| 2115 | */ |
| 2116 | |
| 2117 | static LIST_HEAD(nf_tables_set_ops); |
| 2118 | |
| 2119 | int nft_register_set(struct nft_set_ops *ops) |
| 2120 | { |
| 2121 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2122 | list_add_tail_rcu(&ops->list, &nf_tables_set_ops); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2123 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 2124 | return 0; |
| 2125 | } |
| 2126 | EXPORT_SYMBOL_GPL(nft_register_set); |
| 2127 | |
| 2128 | void nft_unregister_set(struct nft_set_ops *ops) |
| 2129 | { |
| 2130 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2131 | list_del_rcu(&ops->list); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2132 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 2133 | } |
| 2134 | EXPORT_SYMBOL_GPL(nft_unregister_set); |
| 2135 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2136 | /* |
| 2137 | * Select a set implementation based on the data characteristics and the |
| 2138 | * given policy. The total memory use might not be known if no size is |
| 2139 | * given, in that case the amount of memory per element is used. |
| 2140 | */ |
| 2141 | static const struct nft_set_ops * |
| 2142 | nft_select_set_ops(const struct nlattr * const nla[], |
| 2143 | const struct nft_set_desc *desc, |
| 2144 | enum nft_set_policies policy) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2145 | { |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2146 | const struct nft_set_ops *ops, *bops; |
| 2147 | struct nft_set_estimate est, best; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2148 | u32 features; |
| 2149 | |
| 2150 | #ifdef CONFIG_MODULES |
| 2151 | if (list_empty(&nf_tables_set_ops)) { |
| 2152 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 2153 | request_module("nft-set"); |
| 2154 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
| 2155 | if (!list_empty(&nf_tables_set_ops)) |
| 2156 | return ERR_PTR(-EAGAIN); |
| 2157 | } |
| 2158 | #endif |
| 2159 | features = 0; |
| 2160 | if (nla[NFTA_SET_FLAGS] != NULL) { |
| 2161 | features = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); |
Patrick McHardy | 4a8678e | 2015-04-05 14:41:05 +0200 | [diff] [blame] | 2162 | features &= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_TIMEOUT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2163 | } |
| 2164 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2165 | bops = NULL; |
| 2166 | best.size = ~0; |
| 2167 | best.class = ~0; |
| 2168 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2169 | list_for_each_entry(ops, &nf_tables_set_ops, list) { |
| 2170 | if ((ops->features & features) != features) |
| 2171 | continue; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2172 | if (!ops->estimate(desc, features, &est)) |
| 2173 | continue; |
| 2174 | |
| 2175 | switch (policy) { |
| 2176 | case NFT_SET_POL_PERFORMANCE: |
| 2177 | if (est.class < best.class) |
| 2178 | break; |
| 2179 | if (est.class == best.class && est.size < best.size) |
| 2180 | break; |
| 2181 | continue; |
| 2182 | case NFT_SET_POL_MEMORY: |
| 2183 | if (est.size < best.size) |
| 2184 | break; |
| 2185 | if (est.size == best.size && est.class < best.class) |
| 2186 | break; |
| 2187 | continue; |
| 2188 | default: |
| 2189 | break; |
| 2190 | } |
| 2191 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2192 | if (!try_module_get(ops->owner)) |
| 2193 | continue; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2194 | if (bops != NULL) |
| 2195 | module_put(bops->owner); |
| 2196 | |
| 2197 | bops = ops; |
| 2198 | best = est; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2199 | } |
| 2200 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2201 | if (bops != NULL) |
| 2202 | return bops; |
| 2203 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2204 | return ERR_PTR(-EOPNOTSUPP); |
| 2205 | } |
| 2206 | |
| 2207 | static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = { |
| 2208 | [NFTA_SET_TABLE] = { .type = NLA_STRING }, |
Pablo Neira Ayuso | a9bdd83 | 2014-03-24 15:10:37 +0100 | [diff] [blame] | 2209 | [NFTA_SET_NAME] = { .type = NLA_STRING, |
| 2210 | .len = IFNAMSIZ - 1 }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2211 | [NFTA_SET_FLAGS] = { .type = NLA_U32 }, |
| 2212 | [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 }, |
| 2213 | [NFTA_SET_KEY_LEN] = { .type = NLA_U32 }, |
| 2214 | [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 }, |
| 2215 | [NFTA_SET_DATA_LEN] = { .type = NLA_U32 }, |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2216 | [NFTA_SET_POLICY] = { .type = NLA_U32 }, |
| 2217 | [NFTA_SET_DESC] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2218 | [NFTA_SET_ID] = { .type = NLA_U32 }, |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2219 | [NFTA_SET_TIMEOUT] = { .type = NLA_U64 }, |
| 2220 | [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 }, |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2221 | }; |
| 2222 | |
| 2223 | static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = { |
| 2224 | [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2225 | }; |
| 2226 | |
| 2227 | static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, |
| 2228 | const struct sk_buff *skb, |
| 2229 | const struct nlmsghdr *nlh, |
| 2230 | const struct nlattr * const nla[]) |
| 2231 | { |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2232 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2233 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2234 | struct nft_af_info *afi = NULL; |
| 2235 | struct nft_table *table = NULL; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2236 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2237 | if (nfmsg->nfgen_family != NFPROTO_UNSPEC) { |
| 2238 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false); |
| 2239 | if (IS_ERR(afi)) |
| 2240 | return PTR_ERR(afi); |
| 2241 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2242 | |
| 2243 | if (nla[NFTA_SET_TABLE] != NULL) { |
Patrick McHardy | ec2c993 | 2014-02-05 15:03:35 +0000 | [diff] [blame] | 2244 | if (afi == NULL) |
| 2245 | return -EAFNOSUPPORT; |
| 2246 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 2247 | table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2248 | if (IS_ERR(table)) |
| 2249 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 2250 | if (table->flags & NFT_TABLE_INACTIVE) |
| 2251 | return -ENOENT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2252 | } |
| 2253 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 2254 | nft_ctx_init(ctx, skb, nlh, afi, table, NULL, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2255 | return 0; |
| 2256 | } |
| 2257 | |
| 2258 | struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
| 2259 | const struct nlattr *nla) |
| 2260 | { |
| 2261 | struct nft_set *set; |
| 2262 | |
| 2263 | if (nla == NULL) |
| 2264 | return ERR_PTR(-EINVAL); |
| 2265 | |
| 2266 | list_for_each_entry(set, &table->sets, list) { |
| 2267 | if (!nla_strcmp(nla, set->name)) |
| 2268 | return set; |
| 2269 | } |
| 2270 | return ERR_PTR(-ENOENT); |
| 2271 | } |
| 2272 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2273 | struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
| 2274 | const struct nlattr *nla) |
| 2275 | { |
| 2276 | struct nft_trans *trans; |
| 2277 | u32 id = ntohl(nla_get_be32(nla)); |
| 2278 | |
| 2279 | list_for_each_entry(trans, &net->nft.commit_list, list) { |
| 2280 | if (trans->msg_type == NFT_MSG_NEWSET && |
| 2281 | id == nft_trans_set_id(trans)) |
| 2282 | return nft_trans_set(trans); |
| 2283 | } |
| 2284 | return ERR_PTR(-ENOENT); |
| 2285 | } |
| 2286 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2287 | static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set, |
| 2288 | const char *name) |
| 2289 | { |
| 2290 | const struct nft_set *i; |
| 2291 | const char *p; |
| 2292 | unsigned long *inuse; |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2293 | unsigned int n = 0, min = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2294 | |
| 2295 | p = strnchr(name, IFNAMSIZ, '%'); |
| 2296 | if (p != NULL) { |
| 2297 | if (p[1] != 'd' || strchr(p + 2, '%')) |
| 2298 | return -EINVAL; |
| 2299 | |
| 2300 | inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL); |
| 2301 | if (inuse == NULL) |
| 2302 | return -ENOMEM; |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2303 | cont: |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2304 | list_for_each_entry(i, &ctx->table->sets, list) { |
Daniel Borkmann | 1466291 | 2013-12-31 12:40:05 +0100 | [diff] [blame] | 2305 | int tmp; |
| 2306 | |
| 2307 | if (!sscanf(i->name, name, &tmp)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2308 | continue; |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2309 | if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2310 | continue; |
Daniel Borkmann | 1466291 | 2013-12-31 12:40:05 +0100 | [diff] [blame] | 2311 | |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2312 | set_bit(tmp - min, inuse); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2313 | } |
| 2314 | |
Patrick McHardy | 53b7028 | 2014-02-05 12:26:22 +0100 | [diff] [blame] | 2315 | n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE); |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2316 | if (n >= BITS_PER_BYTE * PAGE_SIZE) { |
| 2317 | min += BITS_PER_BYTE * PAGE_SIZE; |
| 2318 | memset(inuse, 0, PAGE_SIZE); |
| 2319 | goto cont; |
| 2320 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2321 | free_page((unsigned long)inuse); |
| 2322 | } |
| 2323 | |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2324 | snprintf(set->name, sizeof(set->name), name, min + n); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2325 | list_for_each_entry(i, &ctx->table->sets, list) { |
| 2326 | if (!strcmp(set->name, i->name)) |
| 2327 | return -ENFILE; |
| 2328 | } |
| 2329 | return 0; |
| 2330 | } |
| 2331 | |
| 2332 | static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx, |
| 2333 | const struct nft_set *set, u16 event, u16 flags) |
| 2334 | { |
| 2335 | struct nfgenmsg *nfmsg; |
| 2336 | struct nlmsghdr *nlh; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2337 | struct nlattr *desc; |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2338 | u32 portid = ctx->portid; |
| 2339 | u32 seq = ctx->seq; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2340 | |
| 2341 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 2342 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
| 2343 | flags); |
| 2344 | if (nlh == NULL) |
| 2345 | goto nla_put_failure; |
| 2346 | |
| 2347 | nfmsg = nlmsg_data(nlh); |
| 2348 | nfmsg->nfgen_family = ctx->afi->family; |
| 2349 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 2350 | nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2351 | |
| 2352 | if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name)) |
| 2353 | goto nla_put_failure; |
| 2354 | if (nla_put_string(skb, NFTA_SET_NAME, set->name)) |
| 2355 | goto nla_put_failure; |
| 2356 | if (set->flags != 0) |
| 2357 | if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags))) |
| 2358 | goto nla_put_failure; |
| 2359 | |
| 2360 | if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype))) |
| 2361 | goto nla_put_failure; |
| 2362 | if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen))) |
| 2363 | goto nla_put_failure; |
| 2364 | if (set->flags & NFT_SET_MAP) { |
| 2365 | if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype))) |
| 2366 | goto nla_put_failure; |
| 2367 | if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen))) |
| 2368 | goto nla_put_failure; |
| 2369 | } |
| 2370 | |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2371 | if (set->timeout && |
| 2372 | nla_put_be64(skb, NFTA_SET_TIMEOUT, cpu_to_be64(set->timeout))) |
| 2373 | goto nla_put_failure; |
| 2374 | if (set->gc_int && |
| 2375 | nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int))) |
| 2376 | goto nla_put_failure; |
| 2377 | |
Arturo Borrero | 9363dc4 | 2014-09-23 13:30:41 +0200 | [diff] [blame] | 2378 | if (set->policy != NFT_SET_POL_PERFORMANCE) { |
| 2379 | if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy))) |
| 2380 | goto nla_put_failure; |
| 2381 | } |
| 2382 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2383 | desc = nla_nest_start(skb, NFTA_SET_DESC); |
| 2384 | if (desc == NULL) |
| 2385 | goto nla_put_failure; |
| 2386 | if (set->size && |
| 2387 | nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size))) |
| 2388 | goto nla_put_failure; |
| 2389 | nla_nest_end(skb, desc); |
| 2390 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 2391 | nlmsg_end(skb, nlh); |
| 2392 | return 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2393 | |
| 2394 | nla_put_failure: |
| 2395 | nlmsg_trim(skb, nlh); |
| 2396 | return -1; |
| 2397 | } |
| 2398 | |
| 2399 | static int nf_tables_set_notify(const struct nft_ctx *ctx, |
| 2400 | const struct nft_set *set, |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2401 | int event, gfp_t gfp_flags) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2402 | { |
| 2403 | struct sk_buff *skb; |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2404 | u32 portid = ctx->portid; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2405 | int err; |
| 2406 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2407 | if (!ctx->report && |
| 2408 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2409 | return 0; |
| 2410 | |
| 2411 | err = -ENOBUFS; |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2412 | skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2413 | if (skb == NULL) |
| 2414 | goto err; |
| 2415 | |
| 2416 | err = nf_tables_fill_set(skb, ctx, set, event, 0); |
| 2417 | if (err < 0) { |
| 2418 | kfree_skb(skb); |
| 2419 | goto err; |
| 2420 | } |
| 2421 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2422 | err = nfnetlink_send(skb, ctx->net, portid, NFNLGRP_NFTABLES, |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2423 | ctx->report, gfp_flags); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2424 | err: |
| 2425 | if (err < 0) |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2426 | nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, err); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2427 | return err; |
| 2428 | } |
| 2429 | |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2430 | static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb) |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2431 | { |
| 2432 | const struct nft_set *set; |
| 2433 | unsigned int idx, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2434 | struct nft_af_info *afi; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2435 | struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2]; |
| 2436 | struct net *net = sock_net(skb->sk); |
| 2437 | int cur_family = cb->args[3]; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2438 | struct nft_ctx *ctx = cb->data, ctx_set; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2439 | |
| 2440 | if (cb->args[1]) |
| 2441 | return skb->len; |
| 2442 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2443 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 2444 | cb->seq = net->nft.base_seq; |
| 2445 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2446 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2447 | if (ctx->afi && ctx->afi != afi) |
| 2448 | continue; |
| 2449 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2450 | if (cur_family) { |
| 2451 | if (afi->family != cur_family) |
| 2452 | continue; |
| 2453 | |
| 2454 | cur_family = 0; |
| 2455 | } |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2456 | list_for_each_entry_rcu(table, &afi->tables, list) { |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2457 | if (ctx->table && ctx->table != table) |
| 2458 | continue; |
| 2459 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2460 | if (cur_table) { |
| 2461 | if (cur_table != table) |
| 2462 | continue; |
| 2463 | |
| 2464 | cur_table = NULL; |
| 2465 | } |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2466 | idx = 0; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2467 | list_for_each_entry_rcu(set, &table->sets, list) { |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2468 | if (idx < s_idx) |
| 2469 | goto cont; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2470 | |
| 2471 | ctx_set = *ctx; |
| 2472 | ctx_set.table = table; |
| 2473 | ctx_set.afi = afi; |
| 2474 | if (nf_tables_fill_set(skb, &ctx_set, set, |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2475 | NFT_MSG_NEWSET, |
| 2476 | NLM_F_MULTI) < 0) { |
| 2477 | cb->args[0] = idx; |
| 2478 | cb->args[2] = (unsigned long) table; |
| 2479 | cb->args[3] = afi->family; |
| 2480 | goto done; |
| 2481 | } |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 2482 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2483 | cont: |
| 2484 | idx++; |
| 2485 | } |
| 2486 | if (s_idx) |
| 2487 | s_idx = 0; |
| 2488 | } |
| 2489 | } |
| 2490 | cb->args[1] = 1; |
| 2491 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2492 | rcu_read_unlock(); |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2493 | return skb->len; |
| 2494 | } |
| 2495 | |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2496 | static int nf_tables_dump_sets_done(struct netlink_callback *cb) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2497 | { |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2498 | kfree(cb->data); |
| 2499 | return 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2500 | } |
| 2501 | |
| 2502 | static int nf_tables_getset(struct sock *nlsk, struct sk_buff *skb, |
| 2503 | const struct nlmsghdr *nlh, |
| 2504 | const struct nlattr * const nla[]) |
| 2505 | { |
| 2506 | const struct nft_set *set; |
| 2507 | struct nft_ctx ctx; |
| 2508 | struct sk_buff *skb2; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2509 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2510 | int err; |
| 2511 | |
stephen hemminger | 01cfa0a | 2014-10-29 22:57:19 -0700 | [diff] [blame] | 2512 | /* Verify existence before starting dump */ |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2513 | err = nft_ctx_init_from_setattr(&ctx, skb, nlh, nla); |
| 2514 | if (err < 0) |
| 2515 | return err; |
| 2516 | |
| 2517 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 2518 | struct netlink_dump_control c = { |
| 2519 | .dump = nf_tables_dump_sets, |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2520 | .done = nf_tables_dump_sets_done, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2521 | }; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2522 | struct nft_ctx *ctx_dump; |
| 2523 | |
| 2524 | ctx_dump = kmalloc(sizeof(*ctx_dump), GFP_KERNEL); |
| 2525 | if (ctx_dump == NULL) |
| 2526 | return -ENOMEM; |
| 2527 | |
| 2528 | *ctx_dump = ctx; |
| 2529 | c.data = ctx_dump; |
| 2530 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2531 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 2532 | } |
| 2533 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2534 | /* Only accept unspec with dump */ |
| 2535 | if (nfmsg->nfgen_family == NFPROTO_UNSPEC) |
| 2536 | return -EAFNOSUPPORT; |
| 2537 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2538 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME]); |
| 2539 | if (IS_ERR(set)) |
| 2540 | return PTR_ERR(set); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2541 | if (set->flags & NFT_SET_INACTIVE) |
| 2542 | return -ENOENT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2543 | |
| 2544 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 2545 | if (skb2 == NULL) |
| 2546 | return -ENOMEM; |
| 2547 | |
| 2548 | err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0); |
| 2549 | if (err < 0) |
| 2550 | goto err; |
| 2551 | |
| 2552 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 2553 | |
| 2554 | err: |
| 2555 | kfree_skb(skb2); |
| 2556 | return err; |
| 2557 | } |
| 2558 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2559 | static int nf_tables_set_desc_parse(const struct nft_ctx *ctx, |
| 2560 | struct nft_set_desc *desc, |
| 2561 | const struct nlattr *nla) |
| 2562 | { |
| 2563 | struct nlattr *da[NFTA_SET_DESC_MAX + 1]; |
| 2564 | int err; |
| 2565 | |
| 2566 | err = nla_parse_nested(da, NFTA_SET_DESC_MAX, nla, nft_set_desc_policy); |
| 2567 | if (err < 0) |
| 2568 | return err; |
| 2569 | |
| 2570 | if (da[NFTA_SET_DESC_SIZE] != NULL) |
| 2571 | desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE])); |
| 2572 | |
| 2573 | return 0; |
| 2574 | } |
| 2575 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2576 | static int nf_tables_newset(struct sock *nlsk, struct sk_buff *skb, |
| 2577 | const struct nlmsghdr *nlh, |
| 2578 | const struct nlattr * const nla[]) |
| 2579 | { |
| 2580 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 2581 | const struct nft_set_ops *ops; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2582 | struct nft_af_info *afi; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2583 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2584 | struct nft_table *table; |
| 2585 | struct nft_set *set; |
| 2586 | struct nft_ctx ctx; |
| 2587 | char name[IFNAMSIZ]; |
| 2588 | unsigned int size; |
| 2589 | bool create; |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2590 | u64 timeout; |
| 2591 | u32 ktype, dtype, flags, policy, gc_int; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2592 | struct nft_set_desc desc; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2593 | int err; |
| 2594 | |
| 2595 | if (nla[NFTA_SET_TABLE] == NULL || |
| 2596 | nla[NFTA_SET_NAME] == NULL || |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2597 | nla[NFTA_SET_KEY_LEN] == NULL || |
| 2598 | nla[NFTA_SET_ID] == NULL) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2599 | return -EINVAL; |
| 2600 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2601 | memset(&desc, 0, sizeof(desc)); |
| 2602 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2603 | ktype = NFT_DATA_VALUE; |
| 2604 | if (nla[NFTA_SET_KEY_TYPE] != NULL) { |
| 2605 | ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE])); |
| 2606 | if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK) |
| 2607 | return -EINVAL; |
| 2608 | } |
| 2609 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2610 | desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN])); |
| 2611 | if (desc.klen == 0 || desc.klen > FIELD_SIZEOF(struct nft_data, data)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2612 | return -EINVAL; |
| 2613 | |
| 2614 | flags = 0; |
| 2615 | if (nla[NFTA_SET_FLAGS] != NULL) { |
| 2616 | flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); |
| 2617 | if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT | |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2618 | NFT_SET_INTERVAL | NFT_SET_MAP | |
| 2619 | NFT_SET_TIMEOUT)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2620 | return -EINVAL; |
| 2621 | } |
| 2622 | |
| 2623 | dtype = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2624 | if (nla[NFTA_SET_DATA_TYPE] != NULL) { |
| 2625 | if (!(flags & NFT_SET_MAP)) |
| 2626 | return -EINVAL; |
| 2627 | |
| 2628 | dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE])); |
| 2629 | if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK && |
| 2630 | dtype != NFT_DATA_VERDICT) |
| 2631 | return -EINVAL; |
| 2632 | |
| 2633 | if (dtype != NFT_DATA_VERDICT) { |
| 2634 | if (nla[NFTA_SET_DATA_LEN] == NULL) |
| 2635 | return -EINVAL; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2636 | desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN])); |
| 2637 | if (desc.dlen == 0 || |
| 2638 | desc.dlen > FIELD_SIZEOF(struct nft_data, data)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2639 | return -EINVAL; |
| 2640 | } else |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2641 | desc.dlen = sizeof(struct nft_data); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2642 | } else if (flags & NFT_SET_MAP) |
| 2643 | return -EINVAL; |
| 2644 | |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2645 | timeout = 0; |
| 2646 | if (nla[NFTA_SET_TIMEOUT] != NULL) { |
| 2647 | if (!(flags & NFT_SET_TIMEOUT)) |
| 2648 | return -EINVAL; |
| 2649 | timeout = be64_to_cpu(nla_get_be64(nla[NFTA_SET_TIMEOUT])); |
| 2650 | } |
| 2651 | gc_int = 0; |
| 2652 | if (nla[NFTA_SET_GC_INTERVAL] != NULL) { |
| 2653 | if (!(flags & NFT_SET_TIMEOUT)) |
| 2654 | return -EINVAL; |
| 2655 | gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL])); |
| 2656 | } |
| 2657 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2658 | policy = NFT_SET_POL_PERFORMANCE; |
| 2659 | if (nla[NFTA_SET_POLICY] != NULL) |
| 2660 | policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY])); |
| 2661 | |
| 2662 | if (nla[NFTA_SET_DESC] != NULL) { |
| 2663 | err = nf_tables_set_desc_parse(&ctx, &desc, nla[NFTA_SET_DESC]); |
| 2664 | if (err < 0) |
| 2665 | return err; |
| 2666 | } |
| 2667 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2668 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
| 2669 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2670 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, create); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2671 | if (IS_ERR(afi)) |
| 2672 | return PTR_ERR(afi); |
| 2673 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 2674 | table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2675 | if (IS_ERR(table)) |
| 2676 | return PTR_ERR(table); |
| 2677 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 2678 | nft_ctx_init(&ctx, skb, nlh, afi, table, NULL, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2679 | |
| 2680 | set = nf_tables_set_lookup(table, nla[NFTA_SET_NAME]); |
| 2681 | if (IS_ERR(set)) { |
| 2682 | if (PTR_ERR(set) != -ENOENT) |
| 2683 | return PTR_ERR(set); |
| 2684 | set = NULL; |
| 2685 | } |
| 2686 | |
| 2687 | if (set != NULL) { |
| 2688 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 2689 | return -EEXIST; |
| 2690 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 2691 | return -EOPNOTSUPP; |
| 2692 | return 0; |
| 2693 | } |
| 2694 | |
| 2695 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) |
| 2696 | return -ENOENT; |
| 2697 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2698 | ops = nft_select_set_ops(nla, &desc, policy); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2699 | if (IS_ERR(ops)) |
| 2700 | return PTR_ERR(ops); |
| 2701 | |
| 2702 | size = 0; |
| 2703 | if (ops->privsize != NULL) |
| 2704 | size = ops->privsize(nla); |
| 2705 | |
| 2706 | err = -ENOMEM; |
| 2707 | set = kzalloc(sizeof(*set) + size, GFP_KERNEL); |
| 2708 | if (set == NULL) |
| 2709 | goto err1; |
| 2710 | |
| 2711 | nla_strlcpy(name, nla[NFTA_SET_NAME], sizeof(set->name)); |
| 2712 | err = nf_tables_set_alloc_name(&ctx, set, name); |
| 2713 | if (err < 0) |
| 2714 | goto err2; |
| 2715 | |
| 2716 | INIT_LIST_HEAD(&set->bindings); |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 2717 | write_pnet(&set->pnet, net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2718 | set->ops = ops; |
| 2719 | set->ktype = ktype; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2720 | set->klen = desc.klen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2721 | set->dtype = dtype; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2722 | set->dlen = desc.dlen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2723 | set->flags = flags; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2724 | set->size = desc.size; |
Arturo Borrero | 9363dc4 | 2014-09-23 13:30:41 +0200 | [diff] [blame] | 2725 | set->policy = policy; |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2726 | set->timeout = timeout; |
| 2727 | set->gc_int = gc_int; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2728 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2729 | err = ops->init(set, &desc, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2730 | if (err < 0) |
| 2731 | goto err2; |
| 2732 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2733 | err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2734 | if (err < 0) |
| 2735 | goto err2; |
| 2736 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2737 | list_add_tail_rcu(&set->list, &table->sets); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 2738 | table->use++; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2739 | return 0; |
| 2740 | |
| 2741 | err2: |
| 2742 | kfree(set); |
| 2743 | err1: |
| 2744 | module_put(ops->owner); |
| 2745 | return err; |
| 2746 | } |
| 2747 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2748 | static void nft_set_destroy(struct nft_set *set) |
| 2749 | { |
| 2750 | set->ops->destroy(set); |
| 2751 | module_put(set->ops->owner); |
| 2752 | kfree(set); |
| 2753 | } |
| 2754 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2755 | static void nf_tables_set_destroy(const struct nft_ctx *ctx, struct nft_set *set) |
| 2756 | { |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2757 | list_del_rcu(&set->list); |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2758 | nf_tables_set_notify(ctx, set, NFT_MSG_DELSET, GFP_ATOMIC); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2759 | nft_set_destroy(set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2760 | } |
| 2761 | |
| 2762 | static int nf_tables_delset(struct sock *nlsk, struct sk_buff *skb, |
| 2763 | const struct nlmsghdr *nlh, |
| 2764 | const struct nlattr * const nla[]) |
| 2765 | { |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2766 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2767 | struct nft_set *set; |
| 2768 | struct nft_ctx ctx; |
| 2769 | int err; |
| 2770 | |
Patrick McHardy | ec2c993 | 2014-02-05 15:03:35 +0000 | [diff] [blame] | 2771 | if (nfmsg->nfgen_family == NFPROTO_UNSPEC) |
| 2772 | return -EAFNOSUPPORT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2773 | if (nla[NFTA_SET_TABLE] == NULL) |
| 2774 | return -EINVAL; |
| 2775 | |
| 2776 | err = nft_ctx_init_from_setattr(&ctx, skb, nlh, nla); |
| 2777 | if (err < 0) |
| 2778 | return err; |
| 2779 | |
| 2780 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME]); |
| 2781 | if (IS_ERR(set)) |
| 2782 | return PTR_ERR(set); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2783 | if (set->flags & NFT_SET_INACTIVE) |
| 2784 | return -ENOENT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2785 | if (!list_empty(&set->bindings)) |
| 2786 | return -EBUSY; |
| 2787 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 2788 | return nft_delset(&ctx, set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2789 | } |
| 2790 | |
| 2791 | static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx, |
| 2792 | const struct nft_set *set, |
| 2793 | const struct nft_set_iter *iter, |
| 2794 | const struct nft_set_elem *elem) |
| 2795 | { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 2796 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2797 | enum nft_registers dreg; |
| 2798 | |
| 2799 | dreg = nft_type_to_reg(set->dtype); |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 2800 | return nft_validate_data_load(ctx, dreg, nft_set_ext_data(ext), |
Pablo Neira Ayuso | 2ee0d3c | 2013-12-28 00:59:38 +0100 | [diff] [blame] | 2801 | set->dtype == NFT_DATA_VERDICT ? |
| 2802 | NFT_DATA_VERDICT : NFT_DATA_VALUE); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2803 | } |
| 2804 | |
| 2805 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
| 2806 | struct nft_set_binding *binding) |
| 2807 | { |
| 2808 | struct nft_set_binding *i; |
| 2809 | struct nft_set_iter iter; |
| 2810 | |
| 2811 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_ANONYMOUS) |
| 2812 | return -EBUSY; |
| 2813 | |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 2814 | if (binding->flags & NFT_SET_MAP) { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2815 | /* If the set is already bound to the same chain all |
| 2816 | * jumps are already validated for that chain. |
| 2817 | */ |
| 2818 | list_for_each_entry(i, &set->bindings, list) { |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 2819 | if (binding->flags & NFT_SET_MAP && |
| 2820 | i->chain == binding->chain) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2821 | goto bind; |
| 2822 | } |
| 2823 | |
| 2824 | iter.skip = 0; |
| 2825 | iter.count = 0; |
| 2826 | iter.err = 0; |
| 2827 | iter.fn = nf_tables_bind_check_setelem; |
| 2828 | |
| 2829 | set->ops->walk(ctx, set, &iter); |
| 2830 | if (iter.err < 0) { |
| 2831 | /* Destroy anonymous sets if binding fails */ |
| 2832 | if (set->flags & NFT_SET_ANONYMOUS) |
| 2833 | nf_tables_set_destroy(ctx, set); |
| 2834 | |
| 2835 | return iter.err; |
| 2836 | } |
| 2837 | } |
| 2838 | bind: |
| 2839 | binding->chain = ctx->chain; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2840 | list_add_tail_rcu(&binding->list, &set->bindings); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2841 | return 0; |
| 2842 | } |
| 2843 | |
| 2844 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, |
| 2845 | struct nft_set_binding *binding) |
| 2846 | { |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2847 | list_del_rcu(&binding->list); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2848 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2849 | if (list_empty(&set->bindings) && set->flags & NFT_SET_ANONYMOUS && |
| 2850 | !(set->flags & NFT_SET_INACTIVE)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2851 | nf_tables_set_destroy(ctx, set); |
| 2852 | } |
| 2853 | |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 2854 | const struct nft_set_ext_type nft_set_ext_types[] = { |
| 2855 | [NFT_SET_EXT_KEY] = { |
| 2856 | .len = sizeof(struct nft_data), |
| 2857 | .align = __alignof__(struct nft_data), |
| 2858 | }, |
| 2859 | [NFT_SET_EXT_DATA] = { |
| 2860 | .len = sizeof(struct nft_data), |
| 2861 | .align = __alignof__(struct nft_data), |
| 2862 | }, |
| 2863 | [NFT_SET_EXT_FLAGS] = { |
| 2864 | .len = sizeof(u8), |
| 2865 | .align = __alignof__(u8), |
| 2866 | }, |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 2867 | [NFT_SET_EXT_TIMEOUT] = { |
| 2868 | .len = sizeof(u64), |
| 2869 | .align = __alignof__(u64), |
| 2870 | }, |
| 2871 | [NFT_SET_EXT_EXPIRATION] = { |
| 2872 | .len = sizeof(unsigned long), |
| 2873 | .align = __alignof__(unsigned long), |
| 2874 | }, |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 2875 | [NFT_SET_EXT_USERDATA] = { |
| 2876 | .len = sizeof(struct nft_userdata), |
| 2877 | .align = __alignof__(struct nft_userdata), |
| 2878 | }, |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 2879 | }; |
| 2880 | EXPORT_SYMBOL_GPL(nft_set_ext_types); |
| 2881 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2882 | /* |
| 2883 | * Set elements |
| 2884 | */ |
| 2885 | |
| 2886 | static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = { |
| 2887 | [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED }, |
| 2888 | [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED }, |
| 2889 | [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 }, |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 2890 | [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 }, |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 2891 | [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY, |
| 2892 | .len = NFT_USERDATA_MAXLEN }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2893 | }; |
| 2894 | |
| 2895 | static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = { |
| 2896 | [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING }, |
| 2897 | [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING }, |
| 2898 | [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2899 | [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2900 | }; |
| 2901 | |
| 2902 | static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx, |
| 2903 | const struct sk_buff *skb, |
| 2904 | const struct nlmsghdr *nlh, |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 2905 | const struct nlattr * const nla[], |
| 2906 | bool trans) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2907 | { |
| 2908 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2909 | struct nft_af_info *afi; |
| 2910 | struct nft_table *table; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2911 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2912 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2913 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2914 | if (IS_ERR(afi)) |
| 2915 | return PTR_ERR(afi); |
| 2916 | |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 2917 | table = nf_tables_table_lookup(afi, nla[NFTA_SET_ELEM_LIST_TABLE]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2918 | if (IS_ERR(table)) |
| 2919 | return PTR_ERR(table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 2920 | if (!trans && (table->flags & NFT_TABLE_INACTIVE)) |
| 2921 | return -ENOENT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2922 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 2923 | nft_ctx_init(ctx, skb, nlh, afi, table, NULL, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2924 | return 0; |
| 2925 | } |
| 2926 | |
| 2927 | static int nf_tables_fill_setelem(struct sk_buff *skb, |
| 2928 | const struct nft_set *set, |
| 2929 | const struct nft_set_elem *elem) |
| 2930 | { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 2931 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2932 | unsigned char *b = skb_tail_pointer(skb); |
| 2933 | struct nlattr *nest; |
| 2934 | |
| 2935 | nest = nla_nest_start(skb, NFTA_LIST_ELEM); |
| 2936 | if (nest == NULL) |
| 2937 | goto nla_put_failure; |
| 2938 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 2939 | if (nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext), |
| 2940 | NFT_DATA_VALUE, set->klen) < 0) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2941 | goto nla_put_failure; |
| 2942 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 2943 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) && |
| 2944 | nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext), |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2945 | set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE, |
| 2946 | set->dlen) < 0) |
| 2947 | goto nla_put_failure; |
| 2948 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 2949 | if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) && |
| 2950 | nla_put_be32(skb, NFTA_SET_ELEM_FLAGS, |
| 2951 | htonl(*nft_set_ext_flags(ext)))) |
| 2952 | goto nla_put_failure; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2953 | |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 2954 | if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) && |
| 2955 | nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT, |
| 2956 | cpu_to_be64(*nft_set_ext_timeout(ext)))) |
| 2957 | goto nla_put_failure; |
| 2958 | |
| 2959 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) { |
| 2960 | unsigned long expires, now = jiffies; |
| 2961 | |
| 2962 | expires = *nft_set_ext_expiration(ext); |
| 2963 | if (time_before(now, expires)) |
| 2964 | expires -= now; |
| 2965 | else |
| 2966 | expires = 0; |
| 2967 | |
| 2968 | if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION, |
| 2969 | cpu_to_be64(jiffies_to_msecs(expires)))) |
| 2970 | goto nla_put_failure; |
| 2971 | } |
| 2972 | |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 2973 | if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) { |
| 2974 | struct nft_userdata *udata; |
| 2975 | |
| 2976 | udata = nft_set_ext_userdata(ext); |
| 2977 | if (nla_put(skb, NFTA_SET_ELEM_USERDATA, |
| 2978 | udata->len + 1, udata->data)) |
| 2979 | goto nla_put_failure; |
| 2980 | } |
| 2981 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2982 | nla_nest_end(skb, nest); |
| 2983 | return 0; |
| 2984 | |
| 2985 | nla_put_failure: |
| 2986 | nlmsg_trim(skb, b); |
| 2987 | return -EMSGSIZE; |
| 2988 | } |
| 2989 | |
| 2990 | struct nft_set_dump_args { |
| 2991 | const struct netlink_callback *cb; |
| 2992 | struct nft_set_iter iter; |
| 2993 | struct sk_buff *skb; |
| 2994 | }; |
| 2995 | |
| 2996 | static int nf_tables_dump_setelem(const struct nft_ctx *ctx, |
| 2997 | const struct nft_set *set, |
| 2998 | const struct nft_set_iter *iter, |
| 2999 | const struct nft_set_elem *elem) |
| 3000 | { |
| 3001 | struct nft_set_dump_args *args; |
| 3002 | |
| 3003 | args = container_of(iter, struct nft_set_dump_args, iter); |
| 3004 | return nf_tables_fill_setelem(args->skb, set, elem); |
| 3005 | } |
| 3006 | |
| 3007 | static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb) |
| 3008 | { |
| 3009 | const struct nft_set *set; |
| 3010 | struct nft_set_dump_args args; |
| 3011 | struct nft_ctx ctx; |
| 3012 | struct nlattr *nla[NFTA_SET_ELEM_LIST_MAX + 1]; |
| 3013 | struct nfgenmsg *nfmsg; |
| 3014 | struct nlmsghdr *nlh; |
| 3015 | struct nlattr *nest; |
| 3016 | u32 portid, seq; |
| 3017 | int event, err; |
| 3018 | |
Michal Nazarewicz | 720e0df | 2014-01-01 06:27:19 +0100 | [diff] [blame] | 3019 | err = nlmsg_parse(cb->nlh, sizeof(struct nfgenmsg), nla, |
| 3020 | NFTA_SET_ELEM_LIST_MAX, nft_set_elem_list_policy); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3021 | if (err < 0) |
| 3022 | return err; |
| 3023 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3024 | err = nft_ctx_init_from_elemattr(&ctx, cb->skb, cb->nlh, (void *)nla, |
| 3025 | false); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3026 | if (err < 0) |
| 3027 | return err; |
| 3028 | |
| 3029 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET]); |
| 3030 | if (IS_ERR(set)) |
| 3031 | return PTR_ERR(set); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3032 | if (set->flags & NFT_SET_INACTIVE) |
| 3033 | return -ENOENT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3034 | |
| 3035 | event = NFT_MSG_NEWSETELEM; |
| 3036 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 3037 | portid = NETLINK_CB(cb->skb).portid; |
| 3038 | seq = cb->nlh->nlmsg_seq; |
| 3039 | |
| 3040 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
| 3041 | NLM_F_MULTI); |
| 3042 | if (nlh == NULL) |
| 3043 | goto nla_put_failure; |
| 3044 | |
| 3045 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 6403d96 | 2014-06-11 19:05:28 +0200 | [diff] [blame] | 3046 | nfmsg->nfgen_family = ctx.afi->family; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3047 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3048 | nfmsg->res_id = htons(ctx.net->nft.base_seq & 0xffff); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3049 | |
| 3050 | if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, ctx.table->name)) |
| 3051 | goto nla_put_failure; |
| 3052 | if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name)) |
| 3053 | goto nla_put_failure; |
| 3054 | |
| 3055 | nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS); |
| 3056 | if (nest == NULL) |
| 3057 | goto nla_put_failure; |
| 3058 | |
| 3059 | args.cb = cb; |
| 3060 | args.skb = skb; |
| 3061 | args.iter.skip = cb->args[0]; |
| 3062 | args.iter.count = 0; |
| 3063 | args.iter.err = 0; |
| 3064 | args.iter.fn = nf_tables_dump_setelem; |
| 3065 | set->ops->walk(&ctx, set, &args.iter); |
| 3066 | |
| 3067 | nla_nest_end(skb, nest); |
| 3068 | nlmsg_end(skb, nlh); |
| 3069 | |
| 3070 | if (args.iter.err && args.iter.err != -EMSGSIZE) |
| 3071 | return args.iter.err; |
| 3072 | if (args.iter.count == cb->args[0]) |
| 3073 | return 0; |
| 3074 | |
| 3075 | cb->args[0] = args.iter.count; |
| 3076 | return skb->len; |
| 3077 | |
| 3078 | nla_put_failure: |
| 3079 | return -ENOSPC; |
| 3080 | } |
| 3081 | |
| 3082 | static int nf_tables_getsetelem(struct sock *nlsk, struct sk_buff *skb, |
| 3083 | const struct nlmsghdr *nlh, |
| 3084 | const struct nlattr * const nla[]) |
| 3085 | { |
| 3086 | const struct nft_set *set; |
| 3087 | struct nft_ctx ctx; |
| 3088 | int err; |
| 3089 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3090 | err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, false); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3091 | if (err < 0) |
| 3092 | return err; |
| 3093 | |
| 3094 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET]); |
| 3095 | if (IS_ERR(set)) |
| 3096 | return PTR_ERR(set); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3097 | if (set->flags & NFT_SET_INACTIVE) |
| 3098 | return -ENOENT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3099 | |
| 3100 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 3101 | struct netlink_dump_control c = { |
| 3102 | .dump = nf_tables_dump_set, |
| 3103 | }; |
| 3104 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 3105 | } |
| 3106 | return -EOPNOTSUPP; |
| 3107 | } |
| 3108 | |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3109 | static int nf_tables_fill_setelem_info(struct sk_buff *skb, |
| 3110 | const struct nft_ctx *ctx, u32 seq, |
| 3111 | u32 portid, int event, u16 flags, |
| 3112 | const struct nft_set *set, |
| 3113 | const struct nft_set_elem *elem) |
| 3114 | { |
| 3115 | struct nfgenmsg *nfmsg; |
| 3116 | struct nlmsghdr *nlh; |
| 3117 | struct nlattr *nest; |
| 3118 | int err; |
| 3119 | |
| 3120 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 3121 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
| 3122 | flags); |
| 3123 | if (nlh == NULL) |
| 3124 | goto nla_put_failure; |
| 3125 | |
| 3126 | nfmsg = nlmsg_data(nlh); |
| 3127 | nfmsg->nfgen_family = ctx->afi->family; |
| 3128 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3129 | nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff); |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3130 | |
| 3131 | if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name)) |
| 3132 | goto nla_put_failure; |
| 3133 | if (nla_put_string(skb, NFTA_SET_NAME, set->name)) |
| 3134 | goto nla_put_failure; |
| 3135 | |
| 3136 | nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS); |
| 3137 | if (nest == NULL) |
| 3138 | goto nla_put_failure; |
| 3139 | |
| 3140 | err = nf_tables_fill_setelem(skb, set, elem); |
| 3141 | if (err < 0) |
| 3142 | goto nla_put_failure; |
| 3143 | |
| 3144 | nla_nest_end(skb, nest); |
| 3145 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3146 | nlmsg_end(skb, nlh); |
| 3147 | return 0; |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3148 | |
| 3149 | nla_put_failure: |
| 3150 | nlmsg_trim(skb, nlh); |
| 3151 | return -1; |
| 3152 | } |
| 3153 | |
| 3154 | static int nf_tables_setelem_notify(const struct nft_ctx *ctx, |
| 3155 | const struct nft_set *set, |
| 3156 | const struct nft_set_elem *elem, |
| 3157 | int event, u16 flags) |
| 3158 | { |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 3159 | struct net *net = ctx->net; |
| 3160 | u32 portid = ctx->portid; |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3161 | struct sk_buff *skb; |
| 3162 | int err; |
| 3163 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 3164 | if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3165 | return 0; |
| 3166 | |
| 3167 | err = -ENOBUFS; |
| 3168 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 3169 | if (skb == NULL) |
| 3170 | goto err; |
| 3171 | |
| 3172 | err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags, |
| 3173 | set, elem); |
| 3174 | if (err < 0) { |
| 3175 | kfree_skb(skb); |
| 3176 | goto err; |
| 3177 | } |
| 3178 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 3179 | err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, ctx->report, |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3180 | GFP_KERNEL); |
| 3181 | err: |
| 3182 | if (err < 0) |
| 3183 | nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, err); |
| 3184 | return err; |
| 3185 | } |
| 3186 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3187 | static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx, |
| 3188 | int msg_type, |
| 3189 | struct nft_set *set) |
| 3190 | { |
| 3191 | struct nft_trans *trans; |
| 3192 | |
| 3193 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem)); |
| 3194 | if (trans == NULL) |
| 3195 | return NULL; |
| 3196 | |
| 3197 | nft_trans_elem_set(trans) = set; |
| 3198 | return trans; |
| 3199 | } |
| 3200 | |
Patrick McHardy | 22fe54d | 2015-04-05 14:41:08 +0200 | [diff] [blame] | 3201 | void *nft_set_elem_init(const struct nft_set *set, |
| 3202 | const struct nft_set_ext_tmpl *tmpl, |
| 3203 | const struct nft_data *key, |
| 3204 | const struct nft_data *data, |
| 3205 | u64 timeout, gfp_t gfp) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3206 | { |
| 3207 | struct nft_set_ext *ext; |
| 3208 | void *elem; |
| 3209 | |
| 3210 | elem = kzalloc(set->ops->elemsize + tmpl->len, gfp); |
| 3211 | if (elem == NULL) |
| 3212 | return NULL; |
| 3213 | |
| 3214 | ext = nft_set_elem_ext(set, elem); |
| 3215 | nft_set_ext_init(ext, tmpl); |
| 3216 | |
| 3217 | memcpy(nft_set_ext_key(ext), key, set->klen); |
| 3218 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) |
| 3219 | memcpy(nft_set_ext_data(ext), data, set->dlen); |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3220 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) |
| 3221 | *nft_set_ext_expiration(ext) = |
| 3222 | jiffies + msecs_to_jiffies(timeout); |
| 3223 | if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT)) |
| 3224 | *nft_set_ext_timeout(ext) = timeout; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3225 | |
| 3226 | return elem; |
| 3227 | } |
| 3228 | |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 3229 | void nft_set_elem_destroy(const struct nft_set *set, void *elem) |
| 3230 | { |
| 3231 | struct nft_set_ext *ext = nft_set_elem_ext(set, elem); |
| 3232 | |
| 3233 | nft_data_uninit(nft_set_ext_key(ext), NFT_DATA_VALUE); |
| 3234 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) |
| 3235 | nft_data_uninit(nft_set_ext_data(ext), set->dtype); |
| 3236 | |
| 3237 | kfree(elem); |
| 3238 | } |
| 3239 | EXPORT_SYMBOL_GPL(nft_set_elem_destroy); |
| 3240 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3241 | static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3242 | const struct nlattr *attr) |
| 3243 | { |
| 3244 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; |
| 3245 | struct nft_data_desc d1, d2; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3246 | struct nft_set_ext_tmpl tmpl; |
| 3247 | struct nft_set_ext *ext; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3248 | struct nft_set_elem elem; |
| 3249 | struct nft_set_binding *binding; |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 3250 | struct nft_userdata *udata; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3251 | struct nft_data data; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3252 | enum nft_registers dreg; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3253 | struct nft_trans *trans; |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3254 | u64 timeout; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3255 | u32 flags; |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 3256 | u8 ulen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3257 | int err; |
| 3258 | |
| 3259 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, |
| 3260 | nft_set_elem_policy); |
| 3261 | if (err < 0) |
| 3262 | return err; |
| 3263 | |
| 3264 | if (nla[NFTA_SET_ELEM_KEY] == NULL) |
| 3265 | return -EINVAL; |
| 3266 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3267 | nft_set_ext_prepare(&tmpl); |
| 3268 | |
| 3269 | flags = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3270 | if (nla[NFTA_SET_ELEM_FLAGS] != NULL) { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3271 | flags = ntohl(nla_get_be32(nla[NFTA_SET_ELEM_FLAGS])); |
| 3272 | if (flags & ~NFT_SET_ELEM_INTERVAL_END) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3273 | return -EINVAL; |
Patrick McHardy | 55df35d | 2015-03-21 15:19:16 +0000 | [diff] [blame] | 3274 | if (!(set->flags & NFT_SET_INTERVAL) && |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3275 | flags & NFT_SET_ELEM_INTERVAL_END) |
Patrick McHardy | 55df35d | 2015-03-21 15:19:16 +0000 | [diff] [blame] | 3276 | return -EINVAL; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3277 | if (flags != 0) |
| 3278 | nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3279 | } |
| 3280 | |
| 3281 | if (set->flags & NFT_SET_MAP) { |
| 3282 | if (nla[NFTA_SET_ELEM_DATA] == NULL && |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3283 | !(flags & NFT_SET_ELEM_INTERVAL_END)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3284 | return -EINVAL; |
Pablo Neira Ayuso | bd7fc64 | 2014-02-07 12:53:07 +0100 | [diff] [blame] | 3285 | if (nla[NFTA_SET_ELEM_DATA] != NULL && |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3286 | flags & NFT_SET_ELEM_INTERVAL_END) |
Pablo Neira Ayuso | bd7fc64 | 2014-02-07 12:53:07 +0100 | [diff] [blame] | 3287 | return -EINVAL; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3288 | } else { |
| 3289 | if (nla[NFTA_SET_ELEM_DATA] != NULL) |
| 3290 | return -EINVAL; |
| 3291 | } |
| 3292 | |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3293 | timeout = 0; |
| 3294 | if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) { |
| 3295 | if (!(set->flags & NFT_SET_TIMEOUT)) |
| 3296 | return -EINVAL; |
| 3297 | timeout = be64_to_cpu(nla_get_be64(nla[NFTA_SET_ELEM_TIMEOUT])); |
| 3298 | } else if (set->flags & NFT_SET_TIMEOUT) { |
| 3299 | timeout = set->timeout; |
| 3300 | } |
| 3301 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3302 | err = nft_data_init(ctx, &elem.key, &d1, nla[NFTA_SET_ELEM_KEY]); |
| 3303 | if (err < 0) |
| 3304 | goto err1; |
| 3305 | err = -EINVAL; |
| 3306 | if (d1.type != NFT_DATA_VALUE || d1.len != set->klen) |
| 3307 | goto err2; |
| 3308 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3309 | nft_set_ext_add(&tmpl, NFT_SET_EXT_KEY); |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3310 | if (timeout > 0) { |
| 3311 | nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION); |
| 3312 | if (timeout != set->timeout) |
| 3313 | nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT); |
| 3314 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3315 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3316 | if (nla[NFTA_SET_ELEM_DATA] != NULL) { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3317 | err = nft_data_init(ctx, &data, &d2, nla[NFTA_SET_ELEM_DATA]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3318 | if (err < 0) |
| 3319 | goto err2; |
| 3320 | |
| 3321 | err = -EINVAL; |
| 3322 | if (set->dtype != NFT_DATA_VERDICT && d2.len != set->dlen) |
| 3323 | goto err3; |
| 3324 | |
| 3325 | dreg = nft_type_to_reg(set->dtype); |
| 3326 | list_for_each_entry(binding, &set->bindings, list) { |
| 3327 | struct nft_ctx bind_ctx = { |
| 3328 | .afi = ctx->afi, |
| 3329 | .table = ctx->table, |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 3330 | .chain = (struct nft_chain *)binding->chain, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3331 | }; |
| 3332 | |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 3333 | if (!(binding->flags & NFT_SET_MAP)) |
| 3334 | continue; |
| 3335 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3336 | err = nft_validate_data_load(&bind_ctx, dreg, |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3337 | &data, d2.type); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3338 | if (err < 0) |
| 3339 | goto err3; |
| 3340 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3341 | |
| 3342 | nft_set_ext_add(&tmpl, NFT_SET_EXT_DATA); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3343 | } |
| 3344 | |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 3345 | /* The full maximum length of userdata can exceed the maximum |
| 3346 | * offset value (U8_MAX) for following extensions, therefor it |
| 3347 | * must be the last extension added. |
| 3348 | */ |
| 3349 | ulen = 0; |
| 3350 | if (nla[NFTA_SET_ELEM_USERDATA] != NULL) { |
| 3351 | ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]); |
| 3352 | if (ulen > 0) |
| 3353 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA, |
| 3354 | ulen); |
| 3355 | } |
| 3356 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3357 | err = -ENOMEM; |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3358 | elem.priv = nft_set_elem_init(set, &tmpl, &elem.key, &data, |
| 3359 | timeout, GFP_KERNEL); |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3360 | if (elem.priv == NULL) |
| 3361 | goto err3; |
| 3362 | |
| 3363 | ext = nft_set_elem_ext(set, elem.priv); |
| 3364 | if (flags) |
| 3365 | *nft_set_ext_flags(ext) = flags; |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame^] | 3366 | if (ulen > 0) { |
| 3367 | udata = nft_set_ext_userdata(ext); |
| 3368 | udata->len = ulen - 1; |
| 3369 | nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen); |
| 3370 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3371 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3372 | trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set); |
| 3373 | if (trans == NULL) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3374 | goto err4; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3375 | |
Patrick McHardy | 6908665 | 2015-03-26 12:39:39 +0000 | [diff] [blame] | 3376 | ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3377 | err = set->ops->insert(set, &elem); |
| 3378 | if (err < 0) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3379 | goto err5; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3380 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3381 | nft_trans_elem(trans) = elem; |
Pablo Neira Ayuso | 46bbafc | 2014-05-22 12:36:03 +0200 | [diff] [blame] | 3382 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3383 | return 0; |
| 3384 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3385 | err5: |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3386 | kfree(trans); |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3387 | err4: |
| 3388 | kfree(elem.priv); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3389 | err3: |
| 3390 | if (nla[NFTA_SET_ELEM_DATA] != NULL) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3391 | nft_data_uninit(&data, d2.type); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3392 | err2: |
| 3393 | nft_data_uninit(&elem.key, d1.type); |
| 3394 | err1: |
| 3395 | return err; |
| 3396 | } |
| 3397 | |
| 3398 | static int nf_tables_newsetelem(struct sock *nlsk, struct sk_buff *skb, |
| 3399 | const struct nlmsghdr *nlh, |
| 3400 | const struct nlattr * const nla[]) |
| 3401 | { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3402 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3403 | const struct nlattr *attr; |
| 3404 | struct nft_set *set; |
| 3405 | struct nft_ctx ctx; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3406 | int rem, err = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3407 | |
Pablo Neira Ayuso | 7d5570c | 2014-07-25 13:15:36 +0200 | [diff] [blame] | 3408 | if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) |
| 3409 | return -EINVAL; |
| 3410 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3411 | err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, true); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3412 | if (err < 0) |
| 3413 | return err; |
| 3414 | |
| 3415 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET]); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3416 | if (IS_ERR(set)) { |
| 3417 | if (nla[NFTA_SET_ELEM_LIST_SET_ID]) { |
| 3418 | set = nf_tables_set_lookup_byid(net, |
| 3419 | nla[NFTA_SET_ELEM_LIST_SET_ID]); |
| 3420 | } |
| 3421 | if (IS_ERR(set)) |
| 3422 | return PTR_ERR(set); |
| 3423 | } |
| 3424 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3425 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) |
| 3426 | return -EBUSY; |
| 3427 | |
| 3428 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3429 | if (set->size && |
| 3430 | !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) |
| 3431 | return -ENFILE; |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3432 | |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3433 | err = nft_add_set_elem(&ctx, set, attr); |
| 3434 | if (err < 0) { |
| 3435 | atomic_dec(&set->nelems); |
| 3436 | break; |
| 3437 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3438 | } |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3439 | return err; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3440 | } |
| 3441 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3442 | static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3443 | const struct nlattr *attr) |
| 3444 | { |
| 3445 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; |
| 3446 | struct nft_data_desc desc; |
| 3447 | struct nft_set_elem elem; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3448 | struct nft_trans *trans; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3449 | int err; |
| 3450 | |
| 3451 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, |
| 3452 | nft_set_elem_policy); |
| 3453 | if (err < 0) |
| 3454 | goto err1; |
| 3455 | |
| 3456 | err = -EINVAL; |
| 3457 | if (nla[NFTA_SET_ELEM_KEY] == NULL) |
| 3458 | goto err1; |
| 3459 | |
| 3460 | err = nft_data_init(ctx, &elem.key, &desc, nla[NFTA_SET_ELEM_KEY]); |
| 3461 | if (err < 0) |
| 3462 | goto err1; |
| 3463 | |
| 3464 | err = -EINVAL; |
| 3465 | if (desc.type != NFT_DATA_VALUE || desc.len != set->klen) |
| 3466 | goto err2; |
| 3467 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3468 | trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set); |
Julia Lawall | 609ccf0 | 2014-08-07 14:49:08 +0200 | [diff] [blame] | 3469 | if (trans == NULL) { |
| 3470 | err = -ENOMEM; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3471 | goto err2; |
Julia Lawall | 609ccf0 | 2014-08-07 14:49:08 +0200 | [diff] [blame] | 3472 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3473 | |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3474 | elem.priv = set->ops->deactivate(set, &elem); |
| 3475 | if (elem.priv == NULL) { |
| 3476 | err = -ENOENT; |
| 3477 | goto err3; |
| 3478 | } |
| 3479 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3480 | nft_trans_elem(trans) = elem; |
Pablo Neira Ayuso | 46bbafc | 2014-05-22 12:36:03 +0200 | [diff] [blame] | 3481 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
Thomas Graf | 0dc1362 | 2014-08-01 17:25:38 +0200 | [diff] [blame] | 3482 | return 0; |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3483 | |
| 3484 | err3: |
| 3485 | kfree(trans); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3486 | err2: |
| 3487 | nft_data_uninit(&elem.key, desc.type); |
| 3488 | err1: |
| 3489 | return err; |
| 3490 | } |
| 3491 | |
| 3492 | static int nf_tables_delsetelem(struct sock *nlsk, struct sk_buff *skb, |
| 3493 | const struct nlmsghdr *nlh, |
| 3494 | const struct nlattr * const nla[]) |
| 3495 | { |
| 3496 | const struct nlattr *attr; |
| 3497 | struct nft_set *set; |
| 3498 | struct nft_ctx ctx; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3499 | int rem, err = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3500 | |
Pablo Neira Ayuso | 7d5570c | 2014-07-25 13:15:36 +0200 | [diff] [blame] | 3501 | if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) |
| 3502 | return -EINVAL; |
| 3503 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3504 | err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, false); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3505 | if (err < 0) |
| 3506 | return err; |
| 3507 | |
| 3508 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET]); |
| 3509 | if (IS_ERR(set)) |
| 3510 | return PTR_ERR(set); |
| 3511 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) |
| 3512 | return -EBUSY; |
| 3513 | |
| 3514 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { |
| 3515 | err = nft_del_setelem(&ctx, set, attr); |
| 3516 | if (err < 0) |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3517 | break; |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3518 | |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3519 | set->ndeact++; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3520 | } |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3521 | return err; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3522 | } |
| 3523 | |
Patrick McHardy | cfed7e1 | 2015-03-26 12:39:38 +0000 | [diff] [blame] | 3524 | void nft_set_gc_batch_release(struct rcu_head *rcu) |
| 3525 | { |
| 3526 | struct nft_set_gc_batch *gcb; |
| 3527 | unsigned int i; |
| 3528 | |
| 3529 | gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu); |
| 3530 | for (i = 0; i < gcb->head.cnt; i++) |
| 3531 | nft_set_elem_destroy(gcb->head.set, gcb->elems[i]); |
| 3532 | kfree(gcb); |
| 3533 | } |
| 3534 | EXPORT_SYMBOL_GPL(nft_set_gc_batch_release); |
| 3535 | |
| 3536 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, |
| 3537 | gfp_t gfp) |
| 3538 | { |
| 3539 | struct nft_set_gc_batch *gcb; |
| 3540 | |
| 3541 | gcb = kzalloc(sizeof(*gcb), gfp); |
| 3542 | if (gcb == NULL) |
| 3543 | return gcb; |
| 3544 | gcb->head.set = set; |
| 3545 | return gcb; |
| 3546 | } |
| 3547 | EXPORT_SYMBOL_GPL(nft_set_gc_batch_alloc); |
| 3548 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3549 | static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net, |
| 3550 | u32 portid, u32 seq) |
| 3551 | { |
| 3552 | struct nlmsghdr *nlh; |
| 3553 | struct nfgenmsg *nfmsg; |
| 3554 | int event = (NFNL_SUBSYS_NFTABLES << 8) | NFT_MSG_NEWGEN; |
| 3555 | |
| 3556 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), 0); |
| 3557 | if (nlh == NULL) |
| 3558 | goto nla_put_failure; |
| 3559 | |
| 3560 | nfmsg = nlmsg_data(nlh); |
| 3561 | nfmsg->nfgen_family = AF_UNSPEC; |
| 3562 | nfmsg->version = NFNETLINK_V0; |
| 3563 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
| 3564 | |
| 3565 | if (nla_put_be32(skb, NFTA_GEN_ID, htonl(net->nft.base_seq))) |
| 3566 | goto nla_put_failure; |
| 3567 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3568 | nlmsg_end(skb, nlh); |
| 3569 | return 0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3570 | |
| 3571 | nla_put_failure: |
| 3572 | nlmsg_trim(skb, nlh); |
| 3573 | return -EMSGSIZE; |
| 3574 | } |
| 3575 | |
| 3576 | static int nf_tables_gen_notify(struct net *net, struct sk_buff *skb, int event) |
| 3577 | { |
| 3578 | struct nlmsghdr *nlh = nlmsg_hdr(skb); |
| 3579 | struct sk_buff *skb2; |
| 3580 | int err; |
| 3581 | |
| 3582 | if (nlmsg_report(nlh) && |
| 3583 | !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) |
| 3584 | return 0; |
| 3585 | |
| 3586 | err = -ENOBUFS; |
| 3587 | skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 3588 | if (skb2 == NULL) |
| 3589 | goto err; |
| 3590 | |
| 3591 | err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid, |
| 3592 | nlh->nlmsg_seq); |
| 3593 | if (err < 0) { |
| 3594 | kfree_skb(skb2); |
| 3595 | goto err; |
| 3596 | } |
| 3597 | |
| 3598 | err = nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, |
| 3599 | NFNLGRP_NFTABLES, nlmsg_report(nlh), GFP_KERNEL); |
| 3600 | err: |
| 3601 | if (err < 0) { |
| 3602 | nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES, |
| 3603 | err); |
| 3604 | } |
| 3605 | return err; |
| 3606 | } |
| 3607 | |
| 3608 | static int nf_tables_getgen(struct sock *nlsk, struct sk_buff *skb, |
| 3609 | const struct nlmsghdr *nlh, |
| 3610 | const struct nlattr * const nla[]) |
| 3611 | { |
| 3612 | struct net *net = sock_net(skb->sk); |
| 3613 | struct sk_buff *skb2; |
| 3614 | int err; |
| 3615 | |
| 3616 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 3617 | if (skb2 == NULL) |
| 3618 | return -ENOMEM; |
| 3619 | |
| 3620 | err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid, |
| 3621 | nlh->nlmsg_seq); |
| 3622 | if (err < 0) |
| 3623 | goto err; |
| 3624 | |
| 3625 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 3626 | err: |
| 3627 | kfree_skb(skb2); |
| 3628 | return err; |
| 3629 | } |
| 3630 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3631 | static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = { |
| 3632 | [NFT_MSG_NEWTABLE] = { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3633 | .call_batch = nf_tables_newtable, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3634 | .attr_count = NFTA_TABLE_MAX, |
| 3635 | .policy = nft_table_policy, |
| 3636 | }, |
| 3637 | [NFT_MSG_GETTABLE] = { |
| 3638 | .call = nf_tables_gettable, |
| 3639 | .attr_count = NFTA_TABLE_MAX, |
| 3640 | .policy = nft_table_policy, |
| 3641 | }, |
| 3642 | [NFT_MSG_DELTABLE] = { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3643 | .call_batch = nf_tables_deltable, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3644 | .attr_count = NFTA_TABLE_MAX, |
| 3645 | .policy = nft_table_policy, |
| 3646 | }, |
| 3647 | [NFT_MSG_NEWCHAIN] = { |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3648 | .call_batch = nf_tables_newchain, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3649 | .attr_count = NFTA_CHAIN_MAX, |
| 3650 | .policy = nft_chain_policy, |
| 3651 | }, |
| 3652 | [NFT_MSG_GETCHAIN] = { |
| 3653 | .call = nf_tables_getchain, |
| 3654 | .attr_count = NFTA_CHAIN_MAX, |
| 3655 | .policy = nft_chain_policy, |
| 3656 | }, |
| 3657 | [NFT_MSG_DELCHAIN] = { |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3658 | .call_batch = nf_tables_delchain, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3659 | .attr_count = NFTA_CHAIN_MAX, |
| 3660 | .policy = nft_chain_policy, |
| 3661 | }, |
| 3662 | [NFT_MSG_NEWRULE] = { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 3663 | .call_batch = nf_tables_newrule, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3664 | .attr_count = NFTA_RULE_MAX, |
| 3665 | .policy = nft_rule_policy, |
| 3666 | }, |
| 3667 | [NFT_MSG_GETRULE] = { |
| 3668 | .call = nf_tables_getrule, |
| 3669 | .attr_count = NFTA_RULE_MAX, |
| 3670 | .policy = nft_rule_policy, |
| 3671 | }, |
| 3672 | [NFT_MSG_DELRULE] = { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 3673 | .call_batch = nf_tables_delrule, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3674 | .attr_count = NFTA_RULE_MAX, |
| 3675 | .policy = nft_rule_policy, |
| 3676 | }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3677 | [NFT_MSG_NEWSET] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3678 | .call_batch = nf_tables_newset, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3679 | .attr_count = NFTA_SET_MAX, |
| 3680 | .policy = nft_set_policy, |
| 3681 | }, |
| 3682 | [NFT_MSG_GETSET] = { |
| 3683 | .call = nf_tables_getset, |
| 3684 | .attr_count = NFTA_SET_MAX, |
| 3685 | .policy = nft_set_policy, |
| 3686 | }, |
| 3687 | [NFT_MSG_DELSET] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3688 | .call_batch = nf_tables_delset, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3689 | .attr_count = NFTA_SET_MAX, |
| 3690 | .policy = nft_set_policy, |
| 3691 | }, |
| 3692 | [NFT_MSG_NEWSETELEM] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3693 | .call_batch = nf_tables_newsetelem, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3694 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
| 3695 | .policy = nft_set_elem_list_policy, |
| 3696 | }, |
| 3697 | [NFT_MSG_GETSETELEM] = { |
| 3698 | .call = nf_tables_getsetelem, |
| 3699 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
| 3700 | .policy = nft_set_elem_list_policy, |
| 3701 | }, |
| 3702 | [NFT_MSG_DELSETELEM] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3703 | .call_batch = nf_tables_delsetelem, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3704 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
| 3705 | .policy = nft_set_elem_list_policy, |
| 3706 | }, |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3707 | [NFT_MSG_GETGEN] = { |
| 3708 | .call = nf_tables_getgen, |
| 3709 | }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3710 | }; |
| 3711 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3712 | static void nft_chain_commit_update(struct nft_trans *trans) |
| 3713 | { |
| 3714 | struct nft_base_chain *basechain; |
| 3715 | |
| 3716 | if (nft_trans_chain_name(trans)[0]) |
| 3717 | strcpy(trans->ctx.chain->name, nft_trans_chain_name(trans)); |
| 3718 | |
| 3719 | if (!(trans->ctx.chain->flags & NFT_BASE_CHAIN)) |
| 3720 | return; |
| 3721 | |
| 3722 | basechain = nft_base_chain(trans->ctx.chain); |
| 3723 | nft_chain_stats_replace(basechain, nft_trans_chain_stats(trans)); |
| 3724 | |
| 3725 | switch (nft_trans_chain_policy(trans)) { |
| 3726 | case NF_DROP: |
| 3727 | case NF_ACCEPT: |
| 3728 | basechain->policy = nft_trans_chain_policy(trans); |
| 3729 | break; |
| 3730 | } |
| 3731 | } |
| 3732 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 3733 | static void nf_tables_commit_release(struct nft_trans *trans) |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3734 | { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3735 | switch (trans->msg_type) { |
| 3736 | case NFT_MSG_DELTABLE: |
| 3737 | nf_tables_table_destroy(&trans->ctx); |
| 3738 | break; |
| 3739 | case NFT_MSG_DELCHAIN: |
| 3740 | nf_tables_chain_destroy(trans->ctx.chain); |
| 3741 | break; |
| 3742 | case NFT_MSG_DELRULE: |
| 3743 | nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); |
| 3744 | break; |
| 3745 | case NFT_MSG_DELSET: |
| 3746 | nft_set_destroy(nft_trans_set(trans)); |
| 3747 | break; |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 3748 | case NFT_MSG_DELSETELEM: |
| 3749 | nft_set_elem_destroy(nft_trans_elem_set(trans), |
| 3750 | nft_trans_elem(trans).priv); |
| 3751 | break; |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3752 | } |
| 3753 | kfree(trans); |
| 3754 | } |
| 3755 | |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3756 | static int nf_tables_commit(struct sk_buff *skb) |
| 3757 | { |
| 3758 | struct net *net = sock_net(skb->sk); |
| 3759 | struct nft_trans *trans, *next; |
Pablo Neira Ayuso | a3716e7 | 2014-08-01 19:32:41 +0200 | [diff] [blame] | 3760 | struct nft_trans_elem *te; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3761 | |
| 3762 | /* Bump generation counter, invalidate any dump in progress */ |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 3763 | while (++net->nft.base_seq == 0); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3764 | |
| 3765 | /* A new generation has just started */ |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 3766 | net->nft.gencursor = nft_gencursor_next(net); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3767 | |
| 3768 | /* Make sure all packets have left the previous generation before |
| 3769 | * purging old rules. |
| 3770 | */ |
| 3771 | synchronize_rcu(); |
| 3772 | |
| 3773 | list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3774 | switch (trans->msg_type) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3775 | case NFT_MSG_NEWTABLE: |
| 3776 | if (nft_trans_table_update(trans)) { |
| 3777 | if (!nft_trans_table_enable(trans)) { |
| 3778 | nf_tables_table_disable(trans->ctx.afi, |
| 3779 | trans->ctx.table); |
| 3780 | trans->ctx.table->flags |= NFT_TABLE_F_DORMANT; |
| 3781 | } |
| 3782 | } else { |
| 3783 | trans->ctx.table->flags &= ~NFT_TABLE_INACTIVE; |
| 3784 | } |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3785 | nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3786 | nft_trans_destroy(trans); |
| 3787 | break; |
| 3788 | case NFT_MSG_DELTABLE: |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3789 | nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3790 | break; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3791 | case NFT_MSG_NEWCHAIN: |
| 3792 | if (nft_trans_chain_update(trans)) |
| 3793 | nft_chain_commit_update(trans); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3794 | else |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3795 | trans->ctx.chain->flags &= ~NFT_CHAIN_INACTIVE; |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3796 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3797 | nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3798 | nft_trans_destroy(trans); |
| 3799 | break; |
| 3800 | case NFT_MSG_DELCHAIN: |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3801 | nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN); |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 3802 | nf_tables_unregister_hooks(trans->ctx.table, |
| 3803 | trans->ctx.chain, |
| 3804 | trans->ctx.afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3805 | break; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3806 | case NFT_MSG_NEWRULE: |
| 3807 | nft_rule_clear(trans->ctx.net, nft_trans_rule(trans)); |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3808 | nf_tables_rule_notify(&trans->ctx, |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3809 | nft_trans_rule(trans), |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3810 | NFT_MSG_NEWRULE); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3811 | nft_trans_destroy(trans); |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3812 | break; |
| 3813 | case NFT_MSG_DELRULE: |
| 3814 | list_del_rcu(&nft_trans_rule(trans)->list); |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 3815 | nf_tables_rule_notify(&trans->ctx, |
| 3816 | nft_trans_rule(trans), |
| 3817 | NFT_MSG_DELRULE); |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3818 | break; |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3819 | case NFT_MSG_NEWSET: |
| 3820 | nft_trans_set(trans)->flags &= ~NFT_SET_INACTIVE; |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3821 | /* This avoids hitting -EBUSY when deleting the table |
| 3822 | * from the transaction. |
| 3823 | */ |
| 3824 | if (nft_trans_set(trans)->flags & NFT_SET_ANONYMOUS && |
| 3825 | !list_empty(&nft_trans_set(trans)->bindings)) |
| 3826 | trans->ctx.table->use--; |
| 3827 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3828 | nf_tables_set_notify(&trans->ctx, nft_trans_set(trans), |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 3829 | NFT_MSG_NEWSET, GFP_KERNEL); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3830 | nft_trans_destroy(trans); |
| 3831 | break; |
| 3832 | case NFT_MSG_DELSET: |
| 3833 | nf_tables_set_notify(&trans->ctx, nft_trans_set(trans), |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 3834 | NFT_MSG_DELSET, GFP_KERNEL); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3835 | break; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3836 | case NFT_MSG_NEWSETELEM: |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3837 | te = (struct nft_trans_elem *)trans->data; |
| 3838 | |
| 3839 | te->set->ops->activate(te->set, &te->elem); |
| 3840 | nf_tables_setelem_notify(&trans->ctx, te->set, |
| 3841 | &te->elem, |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3842 | NFT_MSG_NEWSETELEM, 0); |
| 3843 | nft_trans_destroy(trans); |
| 3844 | break; |
| 3845 | case NFT_MSG_DELSETELEM: |
Pablo Neira Ayuso | a3716e7 | 2014-08-01 19:32:41 +0200 | [diff] [blame] | 3846 | te = (struct nft_trans_elem *)trans->data; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3847 | |
Pablo Neira Ayuso | a3716e7 | 2014-08-01 19:32:41 +0200 | [diff] [blame] | 3848 | nf_tables_setelem_notify(&trans->ctx, te->set, |
| 3849 | &te->elem, |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3850 | NFT_MSG_DELSETELEM, 0); |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 3851 | te->set->ops->remove(te->set, &te->elem); |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3852 | atomic_dec(&te->set->nelems); |
| 3853 | te->set->ndeact--; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3854 | break; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3855 | } |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3856 | } |
| 3857 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 3858 | synchronize_rcu(); |
| 3859 | |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3860 | list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3861 | list_del(&trans->list); |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 3862 | nf_tables_commit_release(trans); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3863 | } |
| 3864 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3865 | nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN); |
| 3866 | |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3867 | return 0; |
| 3868 | } |
| 3869 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 3870 | static void nf_tables_abort_release(struct nft_trans *trans) |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3871 | { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3872 | switch (trans->msg_type) { |
| 3873 | case NFT_MSG_NEWTABLE: |
| 3874 | nf_tables_table_destroy(&trans->ctx); |
| 3875 | break; |
| 3876 | case NFT_MSG_NEWCHAIN: |
| 3877 | nf_tables_chain_destroy(trans->ctx.chain); |
| 3878 | break; |
| 3879 | case NFT_MSG_NEWRULE: |
| 3880 | nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); |
| 3881 | break; |
| 3882 | case NFT_MSG_NEWSET: |
| 3883 | nft_set_destroy(nft_trans_set(trans)); |
| 3884 | break; |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 3885 | case NFT_MSG_NEWSETELEM: |
| 3886 | nft_set_elem_destroy(nft_trans_elem_set(trans), |
| 3887 | nft_trans_elem(trans).priv); |
| 3888 | break; |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3889 | } |
| 3890 | kfree(trans); |
| 3891 | } |
| 3892 | |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3893 | static int nf_tables_abort(struct sk_buff *skb) |
| 3894 | { |
| 3895 | struct net *net = sock_net(skb->sk); |
| 3896 | struct nft_trans *trans, *next; |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 3897 | struct nft_trans_elem *te; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3898 | |
| 3899 | list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3900 | switch (trans->msg_type) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3901 | case NFT_MSG_NEWTABLE: |
| 3902 | if (nft_trans_table_update(trans)) { |
| 3903 | if (nft_trans_table_enable(trans)) { |
| 3904 | nf_tables_table_disable(trans->ctx.afi, |
| 3905 | trans->ctx.table); |
| 3906 | trans->ctx.table->flags |= NFT_TABLE_F_DORMANT; |
| 3907 | } |
| 3908 | nft_trans_destroy(trans); |
| 3909 | } else { |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3910 | list_del_rcu(&trans->ctx.table->list); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3911 | } |
| 3912 | break; |
| 3913 | case NFT_MSG_DELTABLE: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3914 | list_add_tail_rcu(&trans->ctx.table->list, |
| 3915 | &trans->ctx.afi->tables); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3916 | nft_trans_destroy(trans); |
| 3917 | break; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3918 | case NFT_MSG_NEWCHAIN: |
| 3919 | if (nft_trans_chain_update(trans)) { |
Markus Elfring | 982f405 | 2014-11-18 20:37:05 +0100 | [diff] [blame] | 3920 | free_percpu(nft_trans_chain_stats(trans)); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3921 | |
| 3922 | nft_trans_destroy(trans); |
| 3923 | } else { |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3924 | trans->ctx.table->use--; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3925 | list_del_rcu(&trans->ctx.chain->list); |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 3926 | nf_tables_unregister_hooks(trans->ctx.table, |
| 3927 | trans->ctx.chain, |
| 3928 | trans->ctx.afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3929 | } |
| 3930 | break; |
| 3931 | case NFT_MSG_DELCHAIN: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3932 | trans->ctx.table->use++; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3933 | list_add_tail_rcu(&trans->ctx.chain->list, |
| 3934 | &trans->ctx.table->chains); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3935 | nft_trans_destroy(trans); |
| 3936 | break; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3937 | case NFT_MSG_NEWRULE: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3938 | trans->ctx.chain->use--; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3939 | list_del_rcu(&nft_trans_rule(trans)->list); |
| 3940 | break; |
| 3941 | case NFT_MSG_DELRULE: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3942 | trans->ctx.chain->use++; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3943 | nft_rule_clear(trans->ctx.net, nft_trans_rule(trans)); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3944 | nft_trans_destroy(trans); |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 3945 | break; |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3946 | case NFT_MSG_NEWSET: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3947 | trans->ctx.table->use--; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3948 | list_del_rcu(&nft_trans_set(trans)->list); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3949 | break; |
| 3950 | case NFT_MSG_DELSET: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3951 | trans->ctx.table->use++; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3952 | list_add_tail_rcu(&nft_trans_set(trans)->list, |
| 3953 | &trans->ctx.table->sets); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3954 | nft_trans_destroy(trans); |
| 3955 | break; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3956 | case NFT_MSG_NEWSETELEM: |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 3957 | te = (struct nft_trans_elem *)trans->data; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3958 | |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 3959 | te->set->ops->remove(te->set, &te->elem); |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3960 | atomic_dec(&te->set->nelems); |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3961 | break; |
| 3962 | case NFT_MSG_DELSETELEM: |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3963 | te = (struct nft_trans_elem *)trans->data; |
| 3964 | |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3965 | te->set->ops->activate(te->set, &te->elem); |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3966 | te->set->ndeact--; |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3967 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3968 | nft_trans_destroy(trans); |
| 3969 | break; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3970 | } |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3971 | } |
| 3972 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 3973 | synchronize_rcu(); |
| 3974 | |
Pablo Neira Ayuso | a1cee07 | 2014-05-23 11:09:42 +0200 | [diff] [blame] | 3975 | list_for_each_entry_safe_reverse(trans, next, |
| 3976 | &net->nft.commit_list, list) { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 3977 | list_del(&trans->list); |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 3978 | nf_tables_abort_release(trans); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 3979 | } |
| 3980 | |
| 3981 | return 0; |
| 3982 | } |
| 3983 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3984 | static const struct nfnetlink_subsystem nf_tables_subsys = { |
| 3985 | .name = "nf_tables", |
| 3986 | .subsys_id = NFNL_SUBSYS_NFTABLES, |
| 3987 | .cb_count = NFT_MSG_MAX, |
| 3988 | .cb = nf_tables_cb, |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 3989 | .commit = nf_tables_commit, |
| 3990 | .abort = nf_tables_abort, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3991 | }; |
| 3992 | |
Pablo Neira Ayuso | 7210e4e | 2014-10-13 19:50:22 +0200 | [diff] [blame] | 3993 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
| 3994 | enum nft_chain_type type) |
| 3995 | { |
| 3996 | const struct nft_base_chain *basechain; |
| 3997 | |
| 3998 | if (chain->flags & NFT_BASE_CHAIN) { |
| 3999 | basechain = nft_base_chain(chain); |
| 4000 | if (basechain->type->type != type) |
| 4001 | return -EOPNOTSUPP; |
| 4002 | } |
| 4003 | return 0; |
| 4004 | } |
| 4005 | EXPORT_SYMBOL_GPL(nft_chain_validate_dependency); |
| 4006 | |
Pablo Neira Ayuso | 75e8d06 | 2015-01-14 15:33:57 +0100 | [diff] [blame] | 4007 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
| 4008 | unsigned int hook_flags) |
| 4009 | { |
| 4010 | struct nft_base_chain *basechain; |
| 4011 | |
| 4012 | if (chain->flags & NFT_BASE_CHAIN) { |
| 4013 | basechain = nft_base_chain(chain); |
| 4014 | |
| 4015 | if ((1 << basechain->ops[0].hooknum) & hook_flags) |
| 4016 | return 0; |
| 4017 | |
| 4018 | return -EOPNOTSUPP; |
| 4019 | } |
| 4020 | |
| 4021 | return 0; |
| 4022 | } |
| 4023 | EXPORT_SYMBOL_GPL(nft_chain_validate_hooks); |
| 4024 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4025 | /* |
| 4026 | * Loop detection - walk through the ruleset beginning at the destination chain |
| 4027 | * of a new jump until either the source chain is reached (loop) or all |
| 4028 | * reachable chains have been traversed. |
| 4029 | * |
| 4030 | * The loop check is performed whenever a new jump verdict is added to an |
| 4031 | * expression or verdict map or a verdict map is bound to a new chain. |
| 4032 | */ |
| 4033 | |
| 4034 | static int nf_tables_check_loops(const struct nft_ctx *ctx, |
| 4035 | const struct nft_chain *chain); |
| 4036 | |
| 4037 | static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx, |
| 4038 | const struct nft_set *set, |
| 4039 | const struct nft_set_iter *iter, |
| 4040 | const struct nft_set_elem *elem) |
| 4041 | { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4042 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
| 4043 | const struct nft_data *data; |
| 4044 | |
| 4045 | if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) && |
| 4046 | *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END) |
Pablo Neira Ayuso | 62f9c8b | 2014-02-07 14:45:01 +0100 | [diff] [blame] | 4047 | return 0; |
| 4048 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4049 | data = nft_set_ext_data(ext); |
| 4050 | switch (data->verdict) { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4051 | case NFT_JUMP: |
| 4052 | case NFT_GOTO: |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4053 | return nf_tables_check_loops(ctx, data->chain); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4054 | default: |
| 4055 | return 0; |
| 4056 | } |
| 4057 | } |
| 4058 | |
| 4059 | static int nf_tables_check_loops(const struct nft_ctx *ctx, |
| 4060 | const struct nft_chain *chain) |
| 4061 | { |
| 4062 | const struct nft_rule *rule; |
| 4063 | const struct nft_expr *expr, *last; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4064 | const struct nft_set *set; |
| 4065 | struct nft_set_binding *binding; |
| 4066 | struct nft_set_iter iter; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4067 | |
| 4068 | if (ctx->chain == chain) |
| 4069 | return -ELOOP; |
| 4070 | |
| 4071 | list_for_each_entry(rule, &chain->rules, list) { |
| 4072 | nft_rule_for_each_expr(expr, last, rule) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 4073 | const struct nft_data *data = NULL; |
| 4074 | int err; |
| 4075 | |
| 4076 | if (!expr->ops->validate) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4077 | continue; |
| 4078 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 4079 | err = expr->ops->validate(ctx, expr, &data); |
| 4080 | if (err < 0) |
| 4081 | return err; |
| 4082 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4083 | if (data == NULL) |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 4084 | continue; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4085 | |
| 4086 | switch (data->verdict) { |
| 4087 | case NFT_JUMP: |
| 4088 | case NFT_GOTO: |
| 4089 | err = nf_tables_check_loops(ctx, data->chain); |
| 4090 | if (err < 0) |
| 4091 | return err; |
| 4092 | default: |
| 4093 | break; |
| 4094 | } |
| 4095 | } |
| 4096 | } |
| 4097 | |
| 4098 | list_for_each_entry(set, &ctx->table->sets, list) { |
| 4099 | if (!(set->flags & NFT_SET_MAP) || |
| 4100 | set->dtype != NFT_DATA_VERDICT) |
| 4101 | continue; |
| 4102 | |
| 4103 | list_for_each_entry(binding, &set->bindings, list) { |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 4104 | if (!(binding->flags & NFT_SET_MAP) || |
| 4105 | binding->chain != chain) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4106 | continue; |
| 4107 | |
| 4108 | iter.skip = 0; |
| 4109 | iter.count = 0; |
| 4110 | iter.err = 0; |
| 4111 | iter.fn = nf_tables_loop_check_setelem; |
| 4112 | |
| 4113 | set->ops->walk(ctx, set, &iter); |
| 4114 | if (iter.err < 0) |
| 4115 | return iter.err; |
| 4116 | } |
| 4117 | } |
| 4118 | |
| 4119 | return 0; |
| 4120 | } |
| 4121 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4122 | /** |
| 4123 | * nft_validate_input_register - validate an expressions' input register |
| 4124 | * |
| 4125 | * @reg: the register number |
| 4126 | * |
| 4127 | * Validate that the input register is one of the general purpose |
| 4128 | * registers. |
| 4129 | */ |
| 4130 | int nft_validate_input_register(enum nft_registers reg) |
| 4131 | { |
| 4132 | if (reg <= NFT_REG_VERDICT) |
| 4133 | return -EINVAL; |
| 4134 | if (reg > NFT_REG_MAX) |
| 4135 | return -ERANGE; |
| 4136 | return 0; |
| 4137 | } |
| 4138 | EXPORT_SYMBOL_GPL(nft_validate_input_register); |
| 4139 | |
| 4140 | /** |
| 4141 | * nft_validate_output_register - validate an expressions' output register |
| 4142 | * |
| 4143 | * @reg: the register number |
| 4144 | * |
| 4145 | * Validate that the output register is one of the general purpose |
| 4146 | * registers or the verdict register. |
| 4147 | */ |
| 4148 | int nft_validate_output_register(enum nft_registers reg) |
| 4149 | { |
| 4150 | if (reg < NFT_REG_VERDICT) |
| 4151 | return -EINVAL; |
| 4152 | if (reg > NFT_REG_MAX) |
| 4153 | return -ERANGE; |
| 4154 | return 0; |
| 4155 | } |
| 4156 | EXPORT_SYMBOL_GPL(nft_validate_output_register); |
| 4157 | |
| 4158 | /** |
| 4159 | * nft_validate_data_load - validate an expressions' data load |
| 4160 | * |
| 4161 | * @ctx: context of the expression performing the load |
| 4162 | * @reg: the destination register number |
| 4163 | * @data: the data to load |
| 4164 | * @type: the data type |
| 4165 | * |
| 4166 | * Validate that a data load uses the appropriate data type for |
| 4167 | * the destination register. A value of NULL for the data means |
| 4168 | * that its runtime gathered data, which is always of type |
| 4169 | * NFT_DATA_VALUE. |
| 4170 | */ |
| 4171 | int nft_validate_data_load(const struct nft_ctx *ctx, enum nft_registers reg, |
| 4172 | const struct nft_data *data, |
| 4173 | enum nft_data_types type) |
| 4174 | { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4175 | int err; |
| 4176 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4177 | switch (reg) { |
| 4178 | case NFT_REG_VERDICT: |
| 4179 | if (data == NULL || type != NFT_DATA_VERDICT) |
| 4180 | return -EINVAL; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4181 | |
| 4182 | if (data->verdict == NFT_GOTO || data->verdict == NFT_JUMP) { |
| 4183 | err = nf_tables_check_loops(ctx, data->chain); |
| 4184 | if (err < 0) |
| 4185 | return err; |
| 4186 | |
| 4187 | if (ctx->chain->level + 1 > data->chain->level) { |
| 4188 | if (ctx->chain->level + 1 == NFT_JUMP_STACK_SIZE) |
| 4189 | return -EMLINK; |
| 4190 | data->chain->level = ctx->chain->level + 1; |
| 4191 | } |
| 4192 | } |
| 4193 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4194 | return 0; |
| 4195 | default: |
| 4196 | if (data != NULL && type != NFT_DATA_VALUE) |
| 4197 | return -EINVAL; |
| 4198 | return 0; |
| 4199 | } |
| 4200 | } |
| 4201 | EXPORT_SYMBOL_GPL(nft_validate_data_load); |
| 4202 | |
| 4203 | static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = { |
| 4204 | [NFTA_VERDICT_CODE] = { .type = NLA_U32 }, |
| 4205 | [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING, |
| 4206 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, |
| 4207 | }; |
| 4208 | |
| 4209 | static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data, |
| 4210 | struct nft_data_desc *desc, const struct nlattr *nla) |
| 4211 | { |
| 4212 | struct nlattr *tb[NFTA_VERDICT_MAX + 1]; |
| 4213 | struct nft_chain *chain; |
| 4214 | int err; |
| 4215 | |
| 4216 | err = nla_parse_nested(tb, NFTA_VERDICT_MAX, nla, nft_verdict_policy); |
| 4217 | if (err < 0) |
| 4218 | return err; |
| 4219 | |
| 4220 | if (!tb[NFTA_VERDICT_CODE]) |
| 4221 | return -EINVAL; |
| 4222 | data->verdict = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE])); |
| 4223 | |
| 4224 | switch (data->verdict) { |
Patrick McHardy | e0abdad | 2014-02-18 18:06:50 +0000 | [diff] [blame] | 4225 | default: |
| 4226 | switch (data->verdict & NF_VERDICT_MASK) { |
| 4227 | case NF_ACCEPT: |
| 4228 | case NF_DROP: |
| 4229 | case NF_QUEUE: |
| 4230 | break; |
| 4231 | default: |
| 4232 | return -EINVAL; |
| 4233 | } |
| 4234 | /* fall through */ |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4235 | case NFT_CONTINUE: |
| 4236 | case NFT_BREAK: |
| 4237 | case NFT_RETURN: |
| 4238 | desc->len = sizeof(data->verdict); |
| 4239 | break; |
| 4240 | case NFT_JUMP: |
| 4241 | case NFT_GOTO: |
| 4242 | if (!tb[NFTA_VERDICT_CHAIN]) |
| 4243 | return -EINVAL; |
| 4244 | chain = nf_tables_chain_lookup(ctx->table, |
| 4245 | tb[NFTA_VERDICT_CHAIN]); |
| 4246 | if (IS_ERR(chain)) |
| 4247 | return PTR_ERR(chain); |
| 4248 | if (chain->flags & NFT_BASE_CHAIN) |
| 4249 | return -EOPNOTSUPP; |
| 4250 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4251 | chain->use++; |
| 4252 | data->chain = chain; |
| 4253 | desc->len = sizeof(data); |
| 4254 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4255 | } |
| 4256 | |
| 4257 | desc->type = NFT_DATA_VERDICT; |
| 4258 | return 0; |
| 4259 | } |
| 4260 | |
| 4261 | static void nft_verdict_uninit(const struct nft_data *data) |
| 4262 | { |
| 4263 | switch (data->verdict) { |
| 4264 | case NFT_JUMP: |
| 4265 | case NFT_GOTO: |
| 4266 | data->chain->use--; |
| 4267 | break; |
| 4268 | } |
| 4269 | } |
| 4270 | |
| 4271 | static int nft_verdict_dump(struct sk_buff *skb, const struct nft_data *data) |
| 4272 | { |
| 4273 | struct nlattr *nest; |
| 4274 | |
| 4275 | nest = nla_nest_start(skb, NFTA_DATA_VERDICT); |
| 4276 | if (!nest) |
| 4277 | goto nla_put_failure; |
| 4278 | |
| 4279 | if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(data->verdict))) |
| 4280 | goto nla_put_failure; |
| 4281 | |
| 4282 | switch (data->verdict) { |
| 4283 | case NFT_JUMP: |
| 4284 | case NFT_GOTO: |
| 4285 | if (nla_put_string(skb, NFTA_VERDICT_CHAIN, data->chain->name)) |
| 4286 | goto nla_put_failure; |
| 4287 | } |
| 4288 | nla_nest_end(skb, nest); |
| 4289 | return 0; |
| 4290 | |
| 4291 | nla_put_failure: |
| 4292 | return -1; |
| 4293 | } |
| 4294 | |
| 4295 | static int nft_value_init(const struct nft_ctx *ctx, struct nft_data *data, |
| 4296 | struct nft_data_desc *desc, const struct nlattr *nla) |
| 4297 | { |
| 4298 | unsigned int len; |
| 4299 | |
| 4300 | len = nla_len(nla); |
| 4301 | if (len == 0) |
| 4302 | return -EINVAL; |
| 4303 | if (len > sizeof(data->data)) |
| 4304 | return -EOVERFLOW; |
| 4305 | |
| 4306 | nla_memcpy(data->data, nla, sizeof(data->data)); |
| 4307 | desc->type = NFT_DATA_VALUE; |
| 4308 | desc->len = len; |
| 4309 | return 0; |
| 4310 | } |
| 4311 | |
| 4312 | static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data, |
| 4313 | unsigned int len) |
| 4314 | { |
| 4315 | return nla_put(skb, NFTA_DATA_VALUE, len, data->data); |
| 4316 | } |
| 4317 | |
| 4318 | static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = { |
| 4319 | [NFTA_DATA_VALUE] = { .type = NLA_BINARY, |
| 4320 | .len = FIELD_SIZEOF(struct nft_data, data) }, |
| 4321 | [NFTA_DATA_VERDICT] = { .type = NLA_NESTED }, |
| 4322 | }; |
| 4323 | |
| 4324 | /** |
| 4325 | * nft_data_init - parse nf_tables data netlink attributes |
| 4326 | * |
| 4327 | * @ctx: context of the expression using the data |
| 4328 | * @data: destination struct nft_data |
| 4329 | * @desc: data description |
| 4330 | * @nla: netlink attribute containing data |
| 4331 | * |
| 4332 | * Parse the netlink data attributes and initialize a struct nft_data. |
| 4333 | * The type and length of data are returned in the data description. |
| 4334 | * |
| 4335 | * The caller can indicate that it only wants to accept data of type |
| 4336 | * NFT_DATA_VALUE by passing NULL for the ctx argument. |
| 4337 | */ |
| 4338 | int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data, |
| 4339 | struct nft_data_desc *desc, const struct nlattr *nla) |
| 4340 | { |
| 4341 | struct nlattr *tb[NFTA_DATA_MAX + 1]; |
| 4342 | int err; |
| 4343 | |
| 4344 | err = nla_parse_nested(tb, NFTA_DATA_MAX, nla, nft_data_policy); |
| 4345 | if (err < 0) |
| 4346 | return err; |
| 4347 | |
| 4348 | if (tb[NFTA_DATA_VALUE]) |
| 4349 | return nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]); |
| 4350 | if (tb[NFTA_DATA_VERDICT] && ctx != NULL) |
| 4351 | return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]); |
| 4352 | return -EINVAL; |
| 4353 | } |
| 4354 | EXPORT_SYMBOL_GPL(nft_data_init); |
| 4355 | |
| 4356 | /** |
| 4357 | * nft_data_uninit - release a nft_data item |
| 4358 | * |
| 4359 | * @data: struct nft_data to release |
| 4360 | * @type: type of data |
| 4361 | * |
| 4362 | * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded, |
| 4363 | * all others need to be released by calling this function. |
| 4364 | */ |
| 4365 | void nft_data_uninit(const struct nft_data *data, enum nft_data_types type) |
| 4366 | { |
| 4367 | switch (type) { |
| 4368 | case NFT_DATA_VALUE: |
| 4369 | return; |
| 4370 | case NFT_DATA_VERDICT: |
| 4371 | return nft_verdict_uninit(data); |
| 4372 | default: |
| 4373 | WARN_ON(1); |
| 4374 | } |
| 4375 | } |
| 4376 | EXPORT_SYMBOL_GPL(nft_data_uninit); |
| 4377 | |
| 4378 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, |
| 4379 | enum nft_data_types type, unsigned int len) |
| 4380 | { |
| 4381 | struct nlattr *nest; |
| 4382 | int err; |
| 4383 | |
| 4384 | nest = nla_nest_start(skb, attr); |
| 4385 | if (nest == NULL) |
| 4386 | return -1; |
| 4387 | |
| 4388 | switch (type) { |
| 4389 | case NFT_DATA_VALUE: |
| 4390 | err = nft_value_dump(skb, data, len); |
| 4391 | break; |
| 4392 | case NFT_DATA_VERDICT: |
| 4393 | err = nft_verdict_dump(skb, data); |
| 4394 | break; |
| 4395 | default: |
| 4396 | err = -EINVAL; |
| 4397 | WARN_ON(1); |
| 4398 | } |
| 4399 | |
| 4400 | nla_nest_end(skb, nest); |
| 4401 | return err; |
| 4402 | } |
| 4403 | EXPORT_SYMBOL_GPL(nft_data_dump); |
| 4404 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4405 | static int nf_tables_init_net(struct net *net) |
| 4406 | { |
| 4407 | INIT_LIST_HEAD(&net->nft.af_info); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 4408 | INIT_LIST_HEAD(&net->nft.commit_list); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 4409 | net->nft.base_seq = 1; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4410 | return 0; |
| 4411 | } |
| 4412 | |
| 4413 | static struct pernet_operations nf_tables_net_ops = { |
| 4414 | .init = nf_tables_init_net, |
| 4415 | }; |
| 4416 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4417 | static int __init nf_tables_module_init(void) |
| 4418 | { |
| 4419 | int err; |
| 4420 | |
| 4421 | info = kmalloc(sizeof(struct nft_expr_info) * NFT_RULE_MAXEXPRS, |
| 4422 | GFP_KERNEL); |
| 4423 | if (info == NULL) { |
| 4424 | err = -ENOMEM; |
| 4425 | goto err1; |
| 4426 | } |
| 4427 | |
| 4428 | err = nf_tables_core_module_init(); |
| 4429 | if (err < 0) |
| 4430 | goto err2; |
| 4431 | |
| 4432 | err = nfnetlink_subsys_register(&nf_tables_subsys); |
| 4433 | if (err < 0) |
| 4434 | goto err3; |
| 4435 | |
| 4436 | pr_info("nf_tables: (c) 2007-2009 Patrick McHardy <kaber@trash.net>\n"); |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4437 | return register_pernet_subsys(&nf_tables_net_ops); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4438 | err3: |
| 4439 | nf_tables_core_module_exit(); |
| 4440 | err2: |
| 4441 | kfree(info); |
| 4442 | err1: |
| 4443 | return err; |
| 4444 | } |
| 4445 | |
| 4446 | static void __exit nf_tables_module_exit(void) |
| 4447 | { |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4448 | unregister_pernet_subsys(&nf_tables_net_ops); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4449 | nfnetlink_subsys_unregister(&nf_tables_subsys); |
Pablo Neira Ayuso | 1b1bc49 | 2014-10-01 13:53:20 +0200 | [diff] [blame] | 4450 | rcu_barrier(); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4451 | nf_tables_core_module_exit(); |
| 4452 | kfree(info); |
| 4453 | } |
| 4454 | |
| 4455 | module_init(nf_tables_module_init); |
| 4456 | module_exit(nf_tables_module_exit); |
| 4457 | |
| 4458 | MODULE_LICENSE("GPL"); |
| 4459 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 4460 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES); |