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 | |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 44 | static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi); |
| 45 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 46 | /** |
| 47 | * nft_unregister_afinfo - unregister nf_tables address family info |
| 48 | * |
| 49 | * @afi: address family info to unregister |
| 50 | * |
| 51 | * Unregister the address family for use with nf_tables. |
| 52 | */ |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 53 | void nft_unregister_afinfo(struct net *net, struct nft_af_info *afi) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 54 | { |
| 55 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 56 | __nft_release_afinfo(net, afi); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 57 | list_del_rcu(&afi->list); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 58 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 59 | } |
| 60 | EXPORT_SYMBOL_GPL(nft_unregister_afinfo); |
| 61 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 62 | 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] | 63 | { |
| 64 | struct nft_af_info *afi; |
| 65 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 66 | list_for_each_entry(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 67 | if (afi->family == family) |
| 68 | return afi; |
| 69 | } |
| 70 | return NULL; |
| 71 | } |
| 72 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 73 | static struct nft_af_info * |
| 74 | nf_tables_afinfo_lookup(struct net *net, int family, bool autoload) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 75 | { |
| 76 | struct nft_af_info *afi; |
| 77 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 78 | afi = nft_afinfo_lookup(net, family); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 79 | if (afi != NULL) |
| 80 | return afi; |
| 81 | #ifdef CONFIG_MODULES |
| 82 | if (autoload) { |
| 83 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 84 | request_module("nft-afinfo-%u", family); |
| 85 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 86 | afi = nft_afinfo_lookup(net, family); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 87 | if (afi != NULL) |
| 88 | return ERR_PTR(-EAGAIN); |
| 89 | } |
| 90 | #endif |
| 91 | return ERR_PTR(-EAFNOSUPPORT); |
| 92 | } |
| 93 | |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 94 | static void nft_ctx_init(struct nft_ctx *ctx, |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 95 | struct net *net, |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 96 | const struct sk_buff *skb, |
| 97 | const struct nlmsghdr *nlh, |
| 98 | struct nft_af_info *afi, |
| 99 | struct nft_table *table, |
| 100 | struct nft_chain *chain, |
| 101 | const struct nlattr * const *nla) |
| 102 | { |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 103 | ctx->net = net; |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 104 | ctx->afi = afi; |
| 105 | ctx->table = table; |
| 106 | ctx->chain = chain; |
| 107 | ctx->nla = nla; |
| 108 | ctx->portid = NETLINK_CB(skb).portid; |
| 109 | ctx->report = nlmsg_report(nlh); |
| 110 | ctx->seq = nlh->nlmsg_seq; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 111 | } |
| 112 | |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 113 | static struct nft_trans *nft_trans_alloc(struct nft_ctx *ctx, int msg_type, |
| 114 | u32 size) |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 115 | { |
| 116 | struct nft_trans *trans; |
| 117 | |
| 118 | trans = kzalloc(sizeof(struct nft_trans) + size, GFP_KERNEL); |
| 119 | if (trans == NULL) |
| 120 | return NULL; |
| 121 | |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 122 | trans->msg_type = msg_type; |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 123 | trans->ctx = *ctx; |
| 124 | |
| 125 | return trans; |
| 126 | } |
| 127 | |
| 128 | static void nft_trans_destroy(struct nft_trans *trans) |
| 129 | { |
| 130 | list_del(&trans->list); |
| 131 | kfree(trans); |
| 132 | } |
| 133 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 134 | static int nf_tables_register_hooks(struct net *net, |
| 135 | const struct nft_table *table, |
Pablo Neira Ayuso | d8ee8f7 | 2015-06-15 02:42:31 +0200 | [diff] [blame] | 136 | struct nft_chain *chain, |
| 137 | unsigned int hook_nops) |
| 138 | { |
| 139 | if (table->flags & NFT_TABLE_F_DORMANT || |
| 140 | !(chain->flags & NFT_BASE_CHAIN)) |
| 141 | return 0; |
| 142 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 143 | return nf_register_net_hooks(net, nft_base_chain(chain)->ops, |
| 144 | hook_nops); |
Pablo Neira Ayuso | d8ee8f7 | 2015-06-15 02:42:31 +0200 | [diff] [blame] | 145 | } |
| 146 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 147 | static void nf_tables_unregister_hooks(struct net *net, |
| 148 | const struct nft_table *table, |
Pablo Neira Ayuso | d8ee8f7 | 2015-06-15 02:42:31 +0200 | [diff] [blame] | 149 | struct nft_chain *chain, |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 150 | unsigned int hook_nops) |
| 151 | { |
Pablo Neira Ayuso | d8ee8f7 | 2015-06-15 02:42:31 +0200 | [diff] [blame] | 152 | if (table->flags & NFT_TABLE_F_DORMANT || |
| 153 | !(chain->flags & NFT_BASE_CHAIN)) |
| 154 | return; |
| 155 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 156 | nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, hook_nops); |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 157 | } |
| 158 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 159 | static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type) |
| 160 | { |
| 161 | struct nft_trans *trans; |
| 162 | |
| 163 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table)); |
| 164 | if (trans == NULL) |
| 165 | return -ENOMEM; |
| 166 | |
| 167 | if (msg_type == NFT_MSG_NEWTABLE) |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 168 | nft_activate_next(ctx->net, ctx->table); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 169 | |
| 170 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static int nft_deltable(struct nft_ctx *ctx) |
| 175 | { |
| 176 | int err; |
| 177 | |
| 178 | err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE); |
| 179 | if (err < 0) |
| 180 | return err; |
| 181 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 182 | nft_deactivate_next(ctx->net, ctx->table); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 183 | return err; |
| 184 | } |
| 185 | |
| 186 | static int nft_trans_chain_add(struct nft_ctx *ctx, int msg_type) |
| 187 | { |
| 188 | struct nft_trans *trans; |
| 189 | |
| 190 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain)); |
| 191 | if (trans == NULL) |
| 192 | return -ENOMEM; |
| 193 | |
| 194 | if (msg_type == NFT_MSG_NEWCHAIN) |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 195 | nft_activate_next(ctx->net, ctx->chain); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 196 | |
| 197 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int nft_delchain(struct nft_ctx *ctx) |
| 202 | { |
| 203 | int err; |
| 204 | |
| 205 | err = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN); |
| 206 | if (err < 0) |
| 207 | return err; |
| 208 | |
| 209 | ctx->table->use--; |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 210 | nft_deactivate_next(ctx->net, ctx->chain); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 211 | |
| 212 | return err; |
| 213 | } |
| 214 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 215 | static int |
| 216 | nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule) |
| 217 | { |
| 218 | /* You cannot delete the same rule twice */ |
Pablo Neira Ayuso | 889f7ee | 2016-06-12 18:07:07 +0200 | [diff] [blame] | 219 | if (nft_is_active_next(ctx->net, rule)) { |
| 220 | nft_deactivate_next(ctx->net, rule); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 221 | ctx->chain->use--; |
| 222 | return 0; |
| 223 | } |
| 224 | return -ENOENT; |
| 225 | } |
| 226 | |
| 227 | static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type, |
| 228 | struct nft_rule *rule) |
| 229 | { |
| 230 | struct nft_trans *trans; |
| 231 | |
| 232 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule)); |
| 233 | if (trans == NULL) |
| 234 | return NULL; |
| 235 | |
| 236 | nft_trans_rule(trans) = rule; |
| 237 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 238 | |
| 239 | return trans; |
| 240 | } |
| 241 | |
| 242 | static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule) |
| 243 | { |
| 244 | struct nft_trans *trans; |
| 245 | int err; |
| 246 | |
| 247 | trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule); |
| 248 | if (trans == NULL) |
| 249 | return -ENOMEM; |
| 250 | |
| 251 | err = nf_tables_delrule_deactivate(ctx, rule); |
| 252 | if (err < 0) { |
| 253 | nft_trans_destroy(trans); |
| 254 | return err; |
| 255 | } |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | static int nft_delrule_by_chain(struct nft_ctx *ctx) |
| 261 | { |
| 262 | struct nft_rule *rule; |
| 263 | int err; |
| 264 | |
| 265 | list_for_each_entry(rule, &ctx->chain->rules, list) { |
Pablo Neira Ayuso | deba234 | 2019-02-15 12:50:24 +0100 | [diff] [blame] | 266 | if (!nft_is_active_next(ctx->net, rule)) |
| 267 | continue; |
| 268 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 269 | err = nft_delrule(ctx, rule); |
| 270 | if (err < 0) |
| 271 | return err; |
| 272 | } |
| 273 | return 0; |
| 274 | } |
| 275 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 276 | static int nft_trans_set_add(struct nft_ctx *ctx, int msg_type, |
| 277 | struct nft_set *set) |
| 278 | { |
| 279 | struct nft_trans *trans; |
| 280 | |
| 281 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set)); |
| 282 | if (trans == NULL) |
| 283 | return -ENOMEM; |
| 284 | |
| 285 | if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] != NULL) { |
| 286 | nft_trans_set_id(trans) = |
| 287 | ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID])); |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 288 | nft_activate_next(ctx->net, set); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 289 | } |
| 290 | nft_trans_set(trans) = set; |
| 291 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | static int nft_delset(struct nft_ctx *ctx, struct nft_set *set) |
| 297 | { |
| 298 | int err; |
| 299 | |
| 300 | err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set); |
| 301 | if (err < 0) |
| 302 | return err; |
| 303 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 304 | nft_deactivate_next(ctx->net, set); |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 305 | ctx->table->use--; |
| 306 | |
| 307 | return err; |
| 308 | } |
| 309 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 310 | /* |
| 311 | * Tables |
| 312 | */ |
| 313 | |
| 314 | static struct nft_table *nft_table_lookup(const struct nft_af_info *afi, |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 315 | const struct nlattr *nla, |
| 316 | u8 genmask) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 317 | { |
| 318 | struct nft_table *table; |
| 319 | |
| 320 | list_for_each_entry(table, &afi->tables, list) { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 321 | if (!nla_strcmp(nla, table->name) && |
| 322 | nft_active_genmask(table, genmask)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 323 | return table; |
| 324 | } |
| 325 | return NULL; |
| 326 | } |
| 327 | |
| 328 | static struct nft_table *nf_tables_table_lookup(const struct nft_af_info *afi, |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 329 | const struct nlattr *nla, |
| 330 | u8 genmask) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 331 | { |
| 332 | struct nft_table *table; |
| 333 | |
| 334 | if (nla == NULL) |
| 335 | return ERR_PTR(-EINVAL); |
| 336 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 337 | table = nft_table_lookup(afi, nla, genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 338 | if (table != NULL) |
| 339 | return table; |
| 340 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 341 | return ERR_PTR(-ENOENT); |
| 342 | } |
| 343 | |
| 344 | static inline u64 nf_tables_alloc_handle(struct nft_table *table) |
| 345 | { |
| 346 | return ++table->hgenerator; |
| 347 | } |
| 348 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 349 | 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] | 350 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 351 | static const struct nf_chain_type * |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 352 | __nf_tables_chain_type_lookup(int family, const struct nlattr *nla) |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 353 | { |
| 354 | int i; |
| 355 | |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 356 | for (i = 0; i < NFT_CHAIN_T_MAX; i++) { |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 357 | if (chain_type[family][i] != NULL && |
| 358 | !nla_strcmp(nla, chain_type[family][i]->name)) |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 359 | return chain_type[family][i]; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 360 | } |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 361 | return NULL; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 362 | } |
| 363 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 364 | static const struct nf_chain_type * |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 365 | nf_tables_chain_type_lookup(const struct nft_af_info *afi, |
| 366 | const struct nlattr *nla, |
| 367 | bool autoload) |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 368 | { |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 369 | const struct nf_chain_type *type; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 370 | |
| 371 | type = __nf_tables_chain_type_lookup(afi->family, nla); |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 372 | if (type != NULL) |
| 373 | return type; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 374 | #ifdef CONFIG_MODULES |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 375 | if (autoload) { |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 376 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 2fec6bb | 2014-03-31 12:26:39 +0200 | [diff] [blame] | 377 | request_module("nft-chain-%u-%.*s", afi->family, |
| 378 | nla_len(nla), (const char *)nla_data(nla)); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 379 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
| 380 | type = __nf_tables_chain_type_lookup(afi->family, nla); |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 381 | if (type != NULL) |
| 382 | return ERR_PTR(-EAGAIN); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 383 | } |
| 384 | #endif |
Patrick McHardy | 93b0806 | 2014-01-09 18:42:36 +0000 | [diff] [blame] | 385 | return ERR_PTR(-ENOENT); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 386 | } |
| 387 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 388 | 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] | 389 | [NFTA_TABLE_NAME] = { .type = NLA_STRING, |
| 390 | .len = NFT_TABLE_MAXNAMELEN - 1 }, |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 391 | [NFTA_TABLE_FLAGS] = { .type = NLA_U32 }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 392 | }; |
| 393 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 394 | static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, |
| 395 | u32 portid, u32 seq, int event, u32 flags, |
| 396 | int family, const struct nft_table *table) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 397 | { |
| 398 | struct nlmsghdr *nlh; |
| 399 | struct nfgenmsg *nfmsg; |
| 400 | |
| 401 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 402 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
| 403 | if (nlh == NULL) |
| 404 | goto nla_put_failure; |
| 405 | |
| 406 | nfmsg = nlmsg_data(nlh); |
| 407 | nfmsg->nfgen_family = family; |
| 408 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 409 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 410 | |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 411 | if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) || |
Tomasz Bursztyka | d8bcc768 | 2013-12-12 15:00:42 +0200 | [diff] [blame] | 412 | nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags)) || |
| 413 | nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use))) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 414 | goto nla_put_failure; |
| 415 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 416 | nlmsg_end(skb, nlh); |
| 417 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 418 | |
| 419 | nla_put_failure: |
| 420 | nlmsg_trim(skb, nlh); |
| 421 | return -1; |
| 422 | } |
| 423 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 424 | 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] | 425 | { |
| 426 | struct sk_buff *skb; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 427 | int err; |
| 428 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 429 | if (!ctx->report && |
| 430 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 431 | return 0; |
| 432 | |
| 433 | err = -ENOBUFS; |
| 434 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 435 | if (skb == NULL) |
| 436 | goto err; |
| 437 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 438 | err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq, |
| 439 | event, 0, ctx->afi->family, ctx->table); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 440 | if (err < 0) { |
| 441 | kfree_skb(skb); |
| 442 | goto err; |
| 443 | } |
| 444 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 445 | err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 446 | ctx->report, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 447 | err: |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 448 | if (err < 0) { |
| 449 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 450 | err); |
| 451 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 452 | return err; |
| 453 | } |
| 454 | |
| 455 | static int nf_tables_dump_tables(struct sk_buff *skb, |
| 456 | struct netlink_callback *cb) |
| 457 | { |
| 458 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 459 | const struct nft_af_info *afi; |
| 460 | const struct nft_table *table; |
| 461 | unsigned int idx = 0, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 462 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 463 | int family = nfmsg->nfgen_family; |
| 464 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 465 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 466 | cb->seq = net->nft.base_seq; |
| 467 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 468 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 469 | if (family != NFPROTO_UNSPEC && family != afi->family) |
| 470 | continue; |
| 471 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 472 | list_for_each_entry_rcu(table, &afi->tables, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 473 | if (idx < s_idx) |
| 474 | goto cont; |
| 475 | if (idx > s_idx) |
| 476 | memset(&cb->args[1], 0, |
| 477 | sizeof(cb->args) - sizeof(cb->args[0])); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 478 | if (!nft_is_active(net, table)) |
| 479 | continue; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 480 | if (nf_tables_fill_table_info(skb, net, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 481 | NETLINK_CB(cb->skb).portid, |
| 482 | cb->nlh->nlmsg_seq, |
| 483 | NFT_MSG_NEWTABLE, |
| 484 | NLM_F_MULTI, |
| 485 | afi->family, table) < 0) |
| 486 | goto done; |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 487 | |
| 488 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 489 | cont: |
| 490 | idx++; |
| 491 | } |
| 492 | } |
| 493 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 494 | rcu_read_unlock(); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 495 | cb->args[0] = idx; |
| 496 | return skb->len; |
| 497 | } |
| 498 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 499 | static int nf_tables_gettable(struct net *net, struct sock *nlsk, |
| 500 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 501 | const struct nlattr * const nla[]) |
| 502 | { |
| 503 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 504 | u8 genmask = nft_genmask_cur(net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 505 | const struct nft_af_info *afi; |
| 506 | const struct nft_table *table; |
| 507 | struct sk_buff *skb2; |
| 508 | int family = nfmsg->nfgen_family; |
| 509 | int err; |
| 510 | |
| 511 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 512 | struct netlink_dump_control c = { |
| 513 | .dump = nf_tables_dump_tables, |
| 514 | }; |
| 515 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 516 | } |
| 517 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 518 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 519 | if (IS_ERR(afi)) |
| 520 | return PTR_ERR(afi); |
| 521 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 522 | table = nf_tables_table_lookup(afi, nla[NFTA_TABLE_NAME], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 523 | if (IS_ERR(table)) |
| 524 | return PTR_ERR(table); |
| 525 | |
| 526 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 527 | if (!skb2) |
| 528 | return -ENOMEM; |
| 529 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 530 | err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 531 | nlh->nlmsg_seq, NFT_MSG_NEWTABLE, 0, |
| 532 | family, table); |
| 533 | if (err < 0) |
| 534 | goto err; |
| 535 | |
| 536 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 537 | |
| 538 | err: |
| 539 | kfree_skb(skb2); |
| 540 | return err; |
| 541 | } |
| 542 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 543 | static int nf_tables_table_enable(struct net *net, |
| 544 | const struct nft_af_info *afi, |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 545 | struct nft_table *table) |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 546 | { |
| 547 | struct nft_chain *chain; |
| 548 | int err, i = 0; |
| 549 | |
| 550 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 551 | if (!nft_is_active_next(net, chain)) |
| 552 | continue; |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 553 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 554 | continue; |
| 555 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 556 | err = nf_register_net_hooks(net, nft_base_chain(chain)->ops, |
| 557 | afi->nops); |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 558 | if (err < 0) |
| 559 | goto err; |
| 560 | |
| 561 | i++; |
| 562 | } |
| 563 | return 0; |
| 564 | err: |
| 565 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 566 | if (!nft_is_active_next(net, chain)) |
| 567 | continue; |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 568 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 569 | continue; |
| 570 | |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 571 | if (i-- <= 0) |
| 572 | break; |
| 573 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 574 | nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, |
| 575 | afi->nops); |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 576 | } |
| 577 | return err; |
| 578 | } |
| 579 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 580 | static void nf_tables_table_disable(struct net *net, |
| 581 | const struct nft_af_info *afi, |
Pablo Neira Ayuso | d8ee8f7 | 2015-06-15 02:42:31 +0200 | [diff] [blame] | 582 | struct nft_table *table) |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 583 | { |
| 584 | struct nft_chain *chain; |
| 585 | |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 586 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 587 | if (!nft_is_active_next(net, chain)) |
| 588 | continue; |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 589 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 590 | continue; |
| 591 | |
| 592 | nf_unregister_net_hooks(net, nft_base_chain(chain)->ops, |
| 593 | afi->nops); |
Pablo Neira Ayuso | d201297 | 2013-12-27 10:44:23 +0100 | [diff] [blame] | 594 | } |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 595 | } |
| 596 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 597 | static int nf_tables_updtable(struct nft_ctx *ctx) |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 598 | { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 599 | struct nft_trans *trans; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 600 | u32 flags; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 601 | int ret = 0; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 602 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 603 | if (!ctx->nla[NFTA_TABLE_FLAGS]) |
| 604 | return 0; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 605 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 606 | flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS])); |
| 607 | if (flags & ~NFT_TABLE_F_DORMANT) |
| 608 | return -EINVAL; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 609 | |
Pablo Neira Ayuso | 63283dd | 2014-06-27 18:51:39 +0200 | [diff] [blame] | 610 | if (flags == ctx->table->flags) |
| 611 | return 0; |
| 612 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 613 | trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE, |
| 614 | sizeof(struct nft_trans_table)); |
| 615 | if (trans == NULL) |
| 616 | return -ENOMEM; |
| 617 | |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 618 | if ((flags & NFT_TABLE_F_DORMANT) && |
| 619 | !(ctx->table->flags & NFT_TABLE_F_DORMANT)) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 620 | nft_trans_table_enable(trans) = false; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 621 | } else if (!(flags & NFT_TABLE_F_DORMANT) && |
| 622 | ctx->table->flags & NFT_TABLE_F_DORMANT) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 623 | ret = nf_tables_table_enable(ctx->net, ctx->afi, ctx->table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 624 | if (ret >= 0) { |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 625 | ctx->table->flags &= ~NFT_TABLE_F_DORMANT; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 626 | nft_trans_table_enable(trans) = true; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 627 | } |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 628 | } |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 629 | if (ret < 0) |
| 630 | goto err; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 631 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 632 | nft_trans_table_update(trans) = true; |
| 633 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
| 634 | return 0; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 635 | err: |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 636 | nft_trans_destroy(trans); |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 637 | return ret; |
| 638 | } |
| 639 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 640 | static int nf_tables_newtable(struct net *net, struct sock *nlsk, |
| 641 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 642 | const struct nlattr * const nla[]) |
| 643 | { |
| 644 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 645 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 646 | const struct nlattr *name; |
| 647 | struct nft_af_info *afi; |
| 648 | struct nft_table *table; |
| 649 | int family = nfmsg->nfgen_family; |
Patrick McHardy | c5c1f97 | 2014-01-09 18:42:39 +0000 | [diff] [blame] | 650 | u32 flags = 0; |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 651 | struct nft_ctx ctx; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 652 | int err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 653 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 654 | afi = nf_tables_afinfo_lookup(net, family, true); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 655 | if (IS_ERR(afi)) |
| 656 | return PTR_ERR(afi); |
| 657 | |
| 658 | name = nla[NFTA_TABLE_NAME]; |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 659 | table = nf_tables_table_lookup(afi, name, genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 660 | if (IS_ERR(table)) { |
| 661 | if (PTR_ERR(table) != -ENOENT) |
| 662 | return PTR_ERR(table); |
| 663 | table = NULL; |
| 664 | } |
| 665 | |
| 666 | if (table != NULL) { |
| 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 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 672 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla); |
Pablo Neira Ayuso | e1aaca9 | 2014-03-30 14:04:53 +0200 | [diff] [blame] | 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 | |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 682 | err = -EAFNOSUPPORT; |
Patrick McHardy | 7047f9d | 2014-01-09 18:42:40 +0000 | [diff] [blame] | 683 | if (!try_module_get(afi->owner)) |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 684 | goto err1; |
Patrick McHardy | 7047f9d | 2014-01-09 18:42:40 +0000 | [diff] [blame] | 685 | |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 686 | err = -ENOMEM; |
Pablo Neira Ayuso | 1cae565 | 2015-03-05 15:05:36 +0100 | [diff] [blame] | 687 | table = kzalloc(sizeof(*table), GFP_KERNEL); |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 688 | if (table == NULL) |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 689 | goto err2; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 690 | |
Pablo Neira Ayuso | 1cae565 | 2015-03-05 15:05:36 +0100 | [diff] [blame] | 691 | nla_strlcpy(table->name, name, NFT_TABLE_MAXNAMELEN); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 692 | INIT_LIST_HEAD(&table->chains); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 693 | INIT_LIST_HEAD(&table->sets); |
Patrick McHardy | c5c1f97 | 2014-01-09 18:42:39 +0000 | [diff] [blame] | 694 | table->flags = flags; |
Pablo Neira Ayuso | 9ddf632 | 2013-10-10 13:26:33 +0200 | [diff] [blame] | 695 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 696 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 697 | err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE); |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 698 | if (err < 0) |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 699 | goto err3; |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 700 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 701 | list_add_tail_rcu(&table->list, &afi->tables); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 702 | return 0; |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 703 | err3: |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 704 | kfree(table); |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 705 | err2: |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 706 | module_put(afi->owner); |
Pablo Neira Ayuso | ebddf1a | 2015-05-26 18:41:20 +0200 | [diff] [blame] | 707 | err1: |
Pablo Neira Ayuso | ffdb210 | 2015-03-17 19:53:23 +0100 | [diff] [blame] | 708 | return err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 709 | } |
| 710 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 711 | static int nft_flush_table(struct nft_ctx *ctx) |
| 712 | { |
| 713 | int err; |
| 714 | struct nft_chain *chain, *nc; |
| 715 | struct nft_set *set, *ns; |
| 716 | |
Pablo Neira Ayuso | a2f18db | 2015-01-04 15:14:22 +0100 | [diff] [blame] | 717 | list_for_each_entry(chain, &ctx->table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 718 | if (!nft_is_active_next(ctx->net, chain)) |
| 719 | continue; |
| 720 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 721 | ctx->chain = chain; |
| 722 | |
| 723 | err = nft_delrule_by_chain(ctx); |
| 724 | if (err < 0) |
| 725 | goto out; |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 726 | } |
| 727 | |
| 728 | list_for_each_entry_safe(set, ns, &ctx->table->sets, list) { |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 729 | if (!nft_is_active_next(ctx->net, set)) |
| 730 | continue; |
| 731 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 732 | if (set->flags & NFT_SET_ANONYMOUS && |
| 733 | !list_empty(&set->bindings)) |
| 734 | continue; |
| 735 | |
| 736 | err = nft_delset(ctx, set); |
| 737 | if (err < 0) |
| 738 | goto out; |
| 739 | } |
| 740 | |
Pablo Neira Ayuso | a2f18db | 2015-01-04 15:14:22 +0100 | [diff] [blame] | 741 | list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 742 | if (!nft_is_active_next(ctx->net, chain)) |
| 743 | continue; |
| 744 | |
Pablo Neira Ayuso | a2f18db | 2015-01-04 15:14:22 +0100 | [diff] [blame] | 745 | ctx->chain = chain; |
| 746 | |
| 747 | err = nft_delchain(ctx); |
| 748 | if (err < 0) |
| 749 | goto out; |
| 750 | } |
| 751 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 752 | err = nft_deltable(ctx); |
| 753 | out: |
| 754 | return err; |
| 755 | } |
| 756 | |
| 757 | static int nft_flush(struct nft_ctx *ctx, int family) |
| 758 | { |
| 759 | struct nft_af_info *afi; |
| 760 | struct nft_table *table, *nt; |
| 761 | const struct nlattr * const *nla = ctx->nla; |
| 762 | int err = 0; |
| 763 | |
| 764 | list_for_each_entry(afi, &ctx->net->nft.af_info, list) { |
| 765 | if (family != AF_UNSPEC && afi->family != family) |
| 766 | continue; |
| 767 | |
| 768 | ctx->afi = afi; |
| 769 | list_for_each_entry_safe(table, nt, &afi->tables, list) { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 770 | if (!nft_is_active_next(ctx->net, table)) |
| 771 | continue; |
| 772 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 773 | if (nla[NFTA_TABLE_NAME] && |
| 774 | nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0) |
| 775 | continue; |
| 776 | |
| 777 | ctx->table = table; |
| 778 | |
| 779 | err = nft_flush_table(ctx); |
| 780 | if (err < 0) |
| 781 | goto out; |
| 782 | } |
| 783 | } |
| 784 | out: |
| 785 | return err; |
| 786 | } |
| 787 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 788 | static int nf_tables_deltable(struct net *net, struct sock *nlsk, |
| 789 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 790 | const struct nlattr * const nla[]) |
| 791 | { |
| 792 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 793 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 794 | struct nft_af_info *afi; |
| 795 | struct nft_table *table; |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 796 | int family = nfmsg->nfgen_family; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 797 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 798 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 799 | nft_ctx_init(&ctx, net, skb, nlh, NULL, NULL, NULL, nla); |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 800 | if (family == AF_UNSPEC || nla[NFTA_TABLE_NAME] == NULL) |
| 801 | return nft_flush(&ctx, family); |
| 802 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 803 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 804 | if (IS_ERR(afi)) |
| 805 | return PTR_ERR(afi); |
| 806 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 807 | table = nf_tables_table_lookup(afi, nla[NFTA_TABLE_NAME], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 808 | if (IS_ERR(table)) |
| 809 | return PTR_ERR(table); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 810 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 811 | ctx.afi = afi; |
| 812 | ctx.table = table; |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 813 | |
Arturo Borrero | b9ac12e | 2014-09-02 16:42:26 +0200 | [diff] [blame] | 814 | return nft_flush_table(&ctx); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 815 | } |
| 816 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 817 | static void nf_tables_table_destroy(struct nft_ctx *ctx) |
| 818 | { |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 819 | BUG_ON(ctx->table->use > 0); |
| 820 | |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 821 | kfree(ctx->table); |
| 822 | module_put(ctx->afi->owner); |
| 823 | } |
| 824 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 825 | int nft_register_chain_type(const struct nf_chain_type *ctype) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 826 | { |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 827 | int err = 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 828 | |
| 829 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 830 | if (chain_type[ctype->family][ctype->type] != NULL) { |
| 831 | err = -EBUSY; |
| 832 | goto out; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 833 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 834 | chain_type[ctype->family][ctype->type] = ctype; |
| 835 | out: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 836 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 837 | return err; |
| 838 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 839 | EXPORT_SYMBOL_GPL(nft_register_chain_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 840 | |
Patrick McHardy | 2a37d75 | 2014-01-09 18:42:37 +0000 | [diff] [blame] | 841 | void nft_unregister_chain_type(const struct nf_chain_type *ctype) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 842 | { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 843 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 844 | chain_type[ctype->family][ctype->type] = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 845 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 846 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 847 | EXPORT_SYMBOL_GPL(nft_unregister_chain_type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 848 | |
| 849 | /* |
| 850 | * Chains |
| 851 | */ |
| 852 | |
| 853 | static struct nft_chain * |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 854 | nf_tables_chain_lookup_byhandle(const struct nft_table *table, u64 handle, |
| 855 | u8 genmask) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 856 | { |
| 857 | struct nft_chain *chain; |
| 858 | |
| 859 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 860 | if (chain->handle == handle && |
| 861 | nft_active_genmask(chain, genmask)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 862 | return chain; |
| 863 | } |
| 864 | |
| 865 | return ERR_PTR(-ENOENT); |
| 866 | } |
| 867 | |
| 868 | static struct nft_chain *nf_tables_chain_lookup(const struct nft_table *table, |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 869 | const struct nlattr *nla, |
| 870 | u8 genmask) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 871 | { |
| 872 | struct nft_chain *chain; |
| 873 | |
| 874 | if (nla == NULL) |
| 875 | return ERR_PTR(-EINVAL); |
| 876 | |
| 877 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 878 | if (!nla_strcmp(nla, chain->name) && |
| 879 | nft_active_genmask(chain, genmask)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 880 | return chain; |
| 881 | } |
| 882 | |
| 883 | return ERR_PTR(-ENOENT); |
| 884 | } |
| 885 | |
| 886 | static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = { |
| 887 | [NFTA_CHAIN_TABLE] = { .type = NLA_STRING }, |
| 888 | [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 }, |
| 889 | [NFTA_CHAIN_NAME] = { .type = NLA_STRING, |
| 890 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, |
| 891 | [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 892 | [NFTA_CHAIN_POLICY] = { .type = NLA_U32 }, |
Pablo Neira | 4c1f781 | 2014-03-31 17:43:47 +0200 | [diff] [blame] | 893 | [NFTA_CHAIN_TYPE] = { .type = NLA_STRING }, |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 894 | [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 895 | }; |
| 896 | |
| 897 | static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = { |
| 898 | [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 }, |
| 899 | [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | 2cbce13 | 2015-06-12 13:55:41 +0200 | [diff] [blame] | 900 | [NFTA_HOOK_DEV] = { .type = NLA_STRING, |
| 901 | .len = IFNAMSIZ - 1 }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 902 | }; |
| 903 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 904 | static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats) |
| 905 | { |
| 906 | struct nft_stats *cpu_stats, total; |
| 907 | struct nlattr *nest; |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 908 | unsigned int seq; |
| 909 | u64 pkts, bytes; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 910 | int cpu; |
| 911 | |
| 912 | memset(&total, 0, sizeof(total)); |
| 913 | for_each_possible_cpu(cpu) { |
| 914 | cpu_stats = per_cpu_ptr(stats, cpu); |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 915 | do { |
| 916 | seq = u64_stats_fetch_begin_irq(&cpu_stats->syncp); |
| 917 | pkts = cpu_stats->pkts; |
| 918 | bytes = cpu_stats->bytes; |
| 919 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, seq)); |
| 920 | total.pkts += pkts; |
| 921 | total.bytes += bytes; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 922 | } |
| 923 | nest = nla_nest_start(skb, NFTA_CHAIN_COUNTERS); |
| 924 | if (nest == NULL) |
| 925 | goto nla_put_failure; |
| 926 | |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 927 | if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts), |
| 928 | NFTA_COUNTER_PAD) || |
| 929 | nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes), |
| 930 | NFTA_COUNTER_PAD)) |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 931 | goto nla_put_failure; |
| 932 | |
| 933 | nla_nest_end(skb, nest); |
| 934 | return 0; |
| 935 | |
| 936 | nla_put_failure: |
| 937 | return -ENOSPC; |
| 938 | } |
| 939 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 940 | static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net, |
| 941 | u32 portid, u32 seq, int event, u32 flags, |
| 942 | int family, const struct nft_table *table, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 943 | const struct nft_chain *chain) |
| 944 | { |
| 945 | struct nlmsghdr *nlh; |
| 946 | struct nfgenmsg *nfmsg; |
| 947 | |
| 948 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 949 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
| 950 | if (nlh == NULL) |
| 951 | goto nla_put_failure; |
| 952 | |
| 953 | nfmsg = nlmsg_data(nlh); |
| 954 | nfmsg->nfgen_family = family; |
| 955 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 956 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 957 | |
| 958 | if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name)) |
| 959 | goto nla_put_failure; |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 960 | if (nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle), |
| 961 | NFTA_CHAIN_PAD)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 962 | goto nla_put_failure; |
| 963 | if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name)) |
| 964 | goto nla_put_failure; |
| 965 | |
| 966 | if (chain->flags & NFT_BASE_CHAIN) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 967 | const struct nft_base_chain *basechain = nft_base_chain(chain); |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 968 | const struct nf_hook_ops *ops = &basechain->ops[0]; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 969 | struct nlattr *nest; |
| 970 | |
| 971 | nest = nla_nest_start(skb, NFTA_CHAIN_HOOK); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 972 | if (nest == NULL) |
| 973 | goto nla_put_failure; |
| 974 | if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum))) |
| 975 | goto nla_put_failure; |
| 976 | if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority))) |
| 977 | goto nla_put_failure; |
Pablo Neira Ayuso | 2cbce13 | 2015-06-12 13:55:41 +0200 | [diff] [blame] | 978 | if (basechain->dev_name[0] && |
| 979 | nla_put_string(skb, NFTA_HOOK_DEV, basechain->dev_name)) |
| 980 | goto nla_put_failure; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 981 | nla_nest_end(skb, nest); |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 982 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 983 | if (nla_put_be32(skb, NFTA_CHAIN_POLICY, |
| 984 | htonl(basechain->policy))) |
| 985 | goto nla_put_failure; |
| 986 | |
Patrick McHardy | baae3e6 | 2014-01-09 18:42:34 +0000 | [diff] [blame] | 987 | if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name)) |
| 988 | goto nla_put_failure; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 989 | |
| 990 | if (nft_dump_stats(skb, nft_base_chain(chain)->stats)) |
| 991 | goto nla_put_failure; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 992 | } |
| 993 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 994 | if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use))) |
| 995 | goto nla_put_failure; |
| 996 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 997 | nlmsg_end(skb, nlh); |
| 998 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 999 | |
| 1000 | nla_put_failure: |
| 1001 | nlmsg_trim(skb, nlh); |
| 1002 | return -1; |
| 1003 | } |
| 1004 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1005 | 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] | 1006 | { |
| 1007 | struct sk_buff *skb; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1008 | int err; |
| 1009 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1010 | if (!ctx->report && |
| 1011 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1012 | return 0; |
| 1013 | |
| 1014 | err = -ENOBUFS; |
| 1015 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1016 | if (skb == NULL) |
| 1017 | goto err; |
| 1018 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1019 | err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq, |
| 1020 | event, 0, ctx->afi->family, ctx->table, |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1021 | ctx->chain); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1022 | if (err < 0) { |
| 1023 | kfree_skb(skb); |
| 1024 | goto err; |
| 1025 | } |
| 1026 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1027 | err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1028 | ctx->report, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1029 | err: |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1030 | if (err < 0) { |
| 1031 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1032 | err); |
| 1033 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1034 | return err; |
| 1035 | } |
| 1036 | |
| 1037 | static int nf_tables_dump_chains(struct sk_buff *skb, |
| 1038 | struct netlink_callback *cb) |
| 1039 | { |
| 1040 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 1041 | const struct nft_af_info *afi; |
| 1042 | const struct nft_table *table; |
| 1043 | const struct nft_chain *chain; |
| 1044 | unsigned int idx = 0, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1045 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1046 | int family = nfmsg->nfgen_family; |
| 1047 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1048 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1049 | cb->seq = net->nft.base_seq; |
| 1050 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1051 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1052 | if (family != NFPROTO_UNSPEC && family != afi->family) |
| 1053 | continue; |
| 1054 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1055 | list_for_each_entry_rcu(table, &afi->tables, list) { |
| 1056 | list_for_each_entry_rcu(chain, &table->chains, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1057 | if (idx < s_idx) |
| 1058 | goto cont; |
| 1059 | if (idx > s_idx) |
| 1060 | memset(&cb->args[1], 0, |
| 1061 | sizeof(cb->args) - sizeof(cb->args[0])); |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 1062 | if (!nft_is_active(net, chain)) |
| 1063 | continue; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1064 | if (nf_tables_fill_chain_info(skb, net, |
| 1065 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1066 | cb->nlh->nlmsg_seq, |
| 1067 | NFT_MSG_NEWCHAIN, |
| 1068 | NLM_F_MULTI, |
| 1069 | afi->family, table, chain) < 0) |
| 1070 | goto done; |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1071 | |
| 1072 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1073 | cont: |
| 1074 | idx++; |
| 1075 | } |
| 1076 | } |
| 1077 | } |
| 1078 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1079 | rcu_read_unlock(); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1080 | cb->args[0] = idx; |
| 1081 | return skb->len; |
| 1082 | } |
| 1083 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1084 | static int nf_tables_getchain(struct net *net, struct sock *nlsk, |
| 1085 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1086 | const struct nlattr * const nla[]) |
| 1087 | { |
| 1088 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1089 | u8 genmask = nft_genmask_cur(net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1090 | const struct nft_af_info *afi; |
| 1091 | const struct nft_table *table; |
| 1092 | const struct nft_chain *chain; |
| 1093 | struct sk_buff *skb2; |
| 1094 | int family = nfmsg->nfgen_family; |
| 1095 | int err; |
| 1096 | |
| 1097 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1098 | struct netlink_dump_control c = { |
| 1099 | .dump = nf_tables_dump_chains, |
| 1100 | }; |
| 1101 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 1102 | } |
| 1103 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1104 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1105 | if (IS_ERR(afi)) |
| 1106 | return PTR_ERR(afi); |
| 1107 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1108 | table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1109 | if (IS_ERR(table)) |
| 1110 | return PTR_ERR(table); |
| 1111 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 1112 | chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1113 | if (IS_ERR(chain)) |
| 1114 | return PTR_ERR(chain); |
| 1115 | |
| 1116 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1117 | if (!skb2) |
| 1118 | return -ENOMEM; |
| 1119 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1120 | err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1121 | nlh->nlmsg_seq, NFT_MSG_NEWCHAIN, 0, |
| 1122 | family, table, chain); |
| 1123 | if (err < 0) |
| 1124 | goto err; |
| 1125 | |
| 1126 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 1127 | |
| 1128 | err: |
| 1129 | kfree_skb(skb2); |
| 1130 | return err; |
| 1131 | } |
| 1132 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1133 | static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = { |
| 1134 | [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 }, |
| 1135 | [NFTA_COUNTER_BYTES] = { .type = NLA_U64 }, |
| 1136 | }; |
| 1137 | |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1138 | 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] | 1139 | { |
| 1140 | struct nlattr *tb[NFTA_COUNTER_MAX+1]; |
| 1141 | struct nft_stats __percpu *newstats; |
| 1142 | struct nft_stats *stats; |
| 1143 | int err; |
| 1144 | |
| 1145 | err = nla_parse_nested(tb, NFTA_COUNTER_MAX, attr, nft_counter_policy); |
| 1146 | if (err < 0) |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1147 | return ERR_PTR(err); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1148 | |
| 1149 | if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS]) |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1150 | return ERR_PTR(-EINVAL); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1151 | |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 1152 | newstats = netdev_alloc_pcpu_stats(struct nft_stats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1153 | if (newstats == NULL) |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1154 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1155 | |
| 1156 | /* Restore old counters on this cpu, no problem. Per-cpu statistics |
| 1157 | * are not exposed to userspace. |
| 1158 | */ |
Pablo Neira Ayuso | e8781f7 | 2015-01-21 18:04:18 +0100 | [diff] [blame] | 1159 | preempt_disable(); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1160 | stats = this_cpu_ptr(newstats); |
| 1161 | stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES])); |
| 1162 | 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] | 1163 | preempt_enable(); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1164 | |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1165 | return newstats; |
| 1166 | } |
| 1167 | |
| 1168 | static void nft_chain_stats_replace(struct nft_base_chain *chain, |
| 1169 | struct nft_stats __percpu *newstats) |
| 1170 | { |
Pablo Neira Ayuso | b88825d | 2014-08-05 17:25:59 +0200 | [diff] [blame] | 1171 | if (newstats == NULL) |
| 1172 | return; |
| 1173 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1174 | if (chain->stats) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1175 | struct nft_stats __percpu *oldstats = |
Patrick McHardy | 67a8fc2 | 2014-02-18 18:06:49 +0000 | [diff] [blame] | 1176 | nft_dereference(chain->stats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1177 | |
| 1178 | rcu_assign_pointer(chain->stats, newstats); |
| 1179 | synchronize_rcu(); |
| 1180 | free_percpu(oldstats); |
| 1181 | } else |
| 1182 | rcu_assign_pointer(chain->stats, newstats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1183 | } |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1184 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1185 | static void nf_tables_chain_destroy(struct nft_chain *chain) |
| 1186 | { |
| 1187 | BUG_ON(chain->use > 0); |
| 1188 | |
| 1189 | if (chain->flags & NFT_BASE_CHAIN) { |
Pablo Neira Ayuso | 2cbce13 | 2015-06-12 13:55:41 +0200 | [diff] [blame] | 1190 | struct nft_base_chain *basechain = nft_base_chain(chain); |
| 1191 | |
| 1192 | module_put(basechain->type->owner); |
| 1193 | free_percpu(basechain->stats); |
| 1194 | if (basechain->ops[0].dev != NULL) |
| 1195 | dev_put(basechain->ops[0].dev); |
| 1196 | kfree(basechain); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1197 | } else { |
| 1198 | kfree(chain); |
| 1199 | } |
| 1200 | } |
| 1201 | |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1202 | struct nft_chain_hook { |
| 1203 | u32 num; |
| 1204 | u32 priority; |
| 1205 | const struct nf_chain_type *type; |
| 1206 | struct net_device *dev; |
| 1207 | }; |
| 1208 | |
| 1209 | static int nft_chain_parse_hook(struct net *net, |
| 1210 | const struct nlattr * const nla[], |
| 1211 | struct nft_af_info *afi, |
| 1212 | struct nft_chain_hook *hook, bool create) |
| 1213 | { |
| 1214 | struct nlattr *ha[NFTA_HOOK_MAX + 1]; |
| 1215 | const struct nf_chain_type *type; |
| 1216 | struct net_device *dev; |
| 1217 | int err; |
| 1218 | |
| 1219 | err = nla_parse_nested(ha, NFTA_HOOK_MAX, nla[NFTA_CHAIN_HOOK], |
| 1220 | nft_hook_policy); |
| 1221 | if (err < 0) |
| 1222 | return err; |
| 1223 | |
| 1224 | if (ha[NFTA_HOOK_HOOKNUM] == NULL || |
| 1225 | ha[NFTA_HOOK_PRIORITY] == NULL) |
| 1226 | return -EINVAL; |
| 1227 | |
| 1228 | hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM])); |
| 1229 | if (hook->num >= afi->nhooks) |
| 1230 | return -EINVAL; |
| 1231 | |
| 1232 | hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY])); |
| 1233 | |
| 1234 | type = chain_type[afi->family][NFT_CHAIN_T_DEFAULT]; |
| 1235 | if (nla[NFTA_CHAIN_TYPE]) { |
| 1236 | type = nf_tables_chain_type_lookup(afi, nla[NFTA_CHAIN_TYPE], |
| 1237 | create); |
| 1238 | if (IS_ERR(type)) |
| 1239 | return PTR_ERR(type); |
| 1240 | } |
| 1241 | if (!(type->hook_mask & (1 << hook->num))) |
| 1242 | return -EOPNOTSUPP; |
| 1243 | if (!try_module_get(type->owner)) |
| 1244 | return -ENOENT; |
| 1245 | |
| 1246 | hook->type = type; |
| 1247 | |
| 1248 | hook->dev = NULL; |
| 1249 | if (afi->flags & NFT_AF_NEEDS_DEV) { |
| 1250 | char ifname[IFNAMSIZ]; |
| 1251 | |
| 1252 | if (!ha[NFTA_HOOK_DEV]) { |
| 1253 | module_put(type->owner); |
| 1254 | return -EOPNOTSUPP; |
| 1255 | } |
| 1256 | |
| 1257 | nla_strlcpy(ifname, ha[NFTA_HOOK_DEV], IFNAMSIZ); |
| 1258 | dev = dev_get_by_name(net, ifname); |
| 1259 | if (!dev) { |
| 1260 | module_put(type->owner); |
| 1261 | return -ENOENT; |
| 1262 | } |
| 1263 | hook->dev = dev; |
| 1264 | } else if (ha[NFTA_HOOK_DEV]) { |
| 1265 | module_put(type->owner); |
| 1266 | return -EOPNOTSUPP; |
| 1267 | } |
| 1268 | |
| 1269 | return 0; |
| 1270 | } |
| 1271 | |
| 1272 | static void nft_chain_release_hook(struct nft_chain_hook *hook) |
| 1273 | { |
| 1274 | module_put(hook->type->owner); |
| 1275 | if (hook->dev != NULL) |
| 1276 | dev_put(hook->dev); |
| 1277 | } |
| 1278 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 1279 | static int nf_tables_newchain(struct net *net, struct sock *nlsk, |
| 1280 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1281 | const struct nlattr * const nla[]) |
| 1282 | { |
| 1283 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 1284 | const struct nlattr * uninitialized_var(name); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 1285 | struct nft_af_info *afi; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1286 | struct nft_table *table; |
| 1287 | struct nft_chain *chain; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1288 | struct nft_base_chain *basechain = NULL; |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1289 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1290 | int family = nfmsg->nfgen_family; |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1291 | u8 policy = NF_ACCEPT; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1292 | u64 handle = 0; |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1293 | unsigned int i; |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1294 | struct nft_stats __percpu *stats; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1295 | int err; |
| 1296 | bool create; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1297 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1298 | |
| 1299 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
| 1300 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1301 | afi = nf_tables_afinfo_lookup(net, family, true); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1302 | if (IS_ERR(afi)) |
| 1303 | return PTR_ERR(afi); |
| 1304 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1305 | table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1306 | if (IS_ERR(table)) |
| 1307 | return PTR_ERR(table); |
| 1308 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1309 | chain = NULL; |
| 1310 | name = nla[NFTA_CHAIN_NAME]; |
| 1311 | |
| 1312 | if (nla[NFTA_CHAIN_HANDLE]) { |
| 1313 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE])); |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 1314 | chain = nf_tables_chain_lookup_byhandle(table, handle, genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1315 | if (IS_ERR(chain)) |
| 1316 | return PTR_ERR(chain); |
| 1317 | } else { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 1318 | chain = nf_tables_chain_lookup(table, name, genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1319 | if (IS_ERR(chain)) { |
| 1320 | if (PTR_ERR(chain) != -ENOENT) |
| 1321 | return PTR_ERR(chain); |
| 1322 | chain = NULL; |
| 1323 | } |
| 1324 | } |
| 1325 | |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1326 | if (nla[NFTA_CHAIN_POLICY]) { |
| 1327 | if ((chain != NULL && |
Pablo Neira Ayuso | d6b6cb1 | 2015-03-17 13:21:42 +0100 | [diff] [blame] | 1328 | !(chain->flags & NFT_BASE_CHAIN))) |
| 1329 | return -EOPNOTSUPP; |
| 1330 | |
| 1331 | if (chain == NULL && |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1332 | nla[NFTA_CHAIN_HOOK] == NULL) |
| 1333 | return -EOPNOTSUPP; |
| 1334 | |
Pablo Neira Ayuso | 8f46df1 | 2014-01-10 15:11:25 +0100 | [diff] [blame] | 1335 | policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY])); |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1336 | switch (policy) { |
| 1337 | case NF_DROP: |
| 1338 | case NF_ACCEPT: |
| 1339 | break; |
| 1340 | default: |
| 1341 | return -EINVAL; |
| 1342 | } |
| 1343 | } |
| 1344 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1345 | if (chain != NULL) { |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1346 | struct nft_stats *stats = NULL; |
| 1347 | struct nft_trans *trans; |
| 1348 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1349 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 1350 | return -EEXIST; |
| 1351 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 1352 | return -EOPNOTSUPP; |
| 1353 | |
Pablo Neira Ayuso | 6133740 | 2016-08-02 00:30:38 +0200 | [diff] [blame] | 1354 | if (nla[NFTA_CHAIN_HOOK]) { |
| 1355 | struct nft_base_chain *basechain; |
| 1356 | struct nft_chain_hook hook; |
| 1357 | struct nf_hook_ops *ops; |
| 1358 | |
| 1359 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 1360 | return -EBUSY; |
| 1361 | |
| 1362 | err = nft_chain_parse_hook(net, nla, afi, &hook, |
| 1363 | create); |
| 1364 | if (err < 0) |
| 1365 | return err; |
| 1366 | |
| 1367 | basechain = nft_base_chain(chain); |
| 1368 | if (basechain->type != hook.type) { |
| 1369 | nft_chain_release_hook(&hook); |
| 1370 | return -EBUSY; |
| 1371 | } |
| 1372 | |
| 1373 | for (i = 0; i < afi->nops; i++) { |
| 1374 | ops = &basechain->ops[i]; |
| 1375 | if (ops->hooknum != hook.num || |
| 1376 | ops->priority != hook.priority || |
| 1377 | ops->dev != hook.dev) { |
| 1378 | nft_chain_release_hook(&hook); |
| 1379 | return -EBUSY; |
| 1380 | } |
| 1381 | } |
| 1382 | nft_chain_release_hook(&hook); |
| 1383 | } |
| 1384 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 1385 | if (nla[NFTA_CHAIN_HANDLE] && name) { |
| 1386 | struct nft_chain *chain2; |
| 1387 | |
| 1388 | chain2 = nf_tables_chain_lookup(table, |
| 1389 | nla[NFTA_CHAIN_NAME], |
| 1390 | genmask); |
| 1391 | if (IS_ERR(chain2)) |
| 1392 | return PTR_ERR(chain2); |
| 1393 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1394 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1395 | if (nla[NFTA_CHAIN_COUNTERS]) { |
| 1396 | if (!(chain->flags & NFT_BASE_CHAIN)) |
| 1397 | return -EOPNOTSUPP; |
| 1398 | |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1399 | stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); |
| 1400 | if (IS_ERR(stats)) |
| 1401 | return PTR_ERR(stats); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1402 | } |
| 1403 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 1404 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1405 | trans = nft_trans_alloc(&ctx, NFT_MSG_NEWCHAIN, |
| 1406 | sizeof(struct nft_trans_chain)); |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1407 | if (trans == NULL) { |
| 1408 | free_percpu(stats); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1409 | return -ENOMEM; |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1410 | } |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1411 | |
| 1412 | nft_trans_chain_stats(trans) = stats; |
| 1413 | nft_trans_chain_update(trans) = true; |
| 1414 | |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1415 | if (nla[NFTA_CHAIN_POLICY]) |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1416 | nft_trans_chain_policy(trans) = policy; |
| 1417 | else |
| 1418 | nft_trans_chain_policy(trans) = -1; |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1419 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1420 | if (nla[NFTA_CHAIN_HANDLE] && name) { |
| 1421 | nla_strlcpy(nft_trans_chain_name(trans), name, |
| 1422 | NFT_CHAIN_MAXNAMELEN); |
| 1423 | } |
| 1424 | list_add_tail(&trans->list, &net->nft.commit_list); |
| 1425 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1426 | } |
| 1427 | |
Patrick McHardy | 7582067 | 2014-01-09 18:42:33 +0000 | [diff] [blame] | 1428 | if (table->use == UINT_MAX) |
| 1429 | return -EOVERFLOW; |
| 1430 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1431 | if (nla[NFTA_CHAIN_HOOK]) { |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1432 | struct nft_chain_hook hook; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1433 | struct nf_hook_ops *ops; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1434 | nf_hookfn *hookfn; |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1435 | |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1436 | err = nft_chain_parse_hook(net, nla, afi, &hook, create); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1437 | if (err < 0) |
| 1438 | return err; |
Pablo Neira Ayuso | 2cbce13 | 2015-06-12 13:55:41 +0200 | [diff] [blame] | 1439 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1440 | basechain = kzalloc(sizeof(*basechain), GFP_KERNEL); |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1441 | if (basechain == NULL) { |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1442 | nft_chain_release_hook(&hook); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1443 | return -ENOMEM; |
Pablo Neira Ayuso | f5553c1 | 2015-01-29 19:08:09 +0100 | [diff] [blame] | 1444 | } |
Pablo Neira Ayuso | 9370761 | 2013-10-10 23:21:26 +0200 | [diff] [blame] | 1445 | |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1446 | if (hook.dev != NULL) |
| 1447 | strncpy(basechain->dev_name, hook.dev->name, IFNAMSIZ); |
Pablo Neira Ayuso | 2cbce13 | 2015-06-12 13:55:41 +0200 | [diff] [blame] | 1448 | |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1449 | if (nla[NFTA_CHAIN_COUNTERS]) { |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1450 | stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); |
| 1451 | if (IS_ERR(stats)) { |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1452 | nft_chain_release_hook(&hook); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1453 | kfree(basechain); |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1454 | return PTR_ERR(stats); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1455 | } |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1456 | basechain->stats = stats; |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1457 | } else { |
Eric Dumazet | ce355e2 | 2014-07-09 15:14:06 +0200 | [diff] [blame] | 1458 | stats = netdev_alloc_pcpu_stats(struct nft_stats); |
Sabrina Dubroca | c123bb7 | 2014-10-21 11:08:21 +0200 | [diff] [blame] | 1459 | if (stats == NULL) { |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1460 | nft_chain_release_hook(&hook); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1461 | kfree(basechain); |
Sabrina Dubroca | c123bb7 | 2014-10-21 11:08:21 +0200 | [diff] [blame] | 1462 | return -ENOMEM; |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1463 | } |
Pablo Neira Ayuso | ff3cd7b | 2014-04-09 11:53:06 +0200 | [diff] [blame] | 1464 | rcu_assign_pointer(basechain->stats, stats); |
Patrick McHardy | 4401a86 | 2014-01-09 18:42:32 +0000 | [diff] [blame] | 1465 | } |
| 1466 | |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1467 | hookfn = hook.type->hooks[hook.num]; |
| 1468 | basechain->type = hook.type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1469 | chain = &basechain->chain; |
| 1470 | |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1471 | for (i = 0; i < afi->nops; i++) { |
| 1472 | ops = &basechain->ops[i]; |
| 1473 | ops->pf = family; |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1474 | ops->hooknum = hook.num; |
| 1475 | ops->priority = hook.priority; |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1476 | ops->priv = chain; |
| 1477 | ops->hook = afi->hooks[ops->hooknum]; |
Pablo Neira Ayuso | 508f8cc | 2016-08-02 00:20:01 +0200 | [diff] [blame] | 1478 | ops->dev = hook.dev; |
Patrick McHardy | 115a60b | 2014-01-03 12:16:15 +0000 | [diff] [blame] | 1479 | if (hookfn) |
| 1480 | ops->hook = hookfn; |
| 1481 | if (afi->hook_ops_init) |
| 1482 | afi->hook_ops_init(ops, i); |
| 1483 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1484 | |
| 1485 | chain->flags |= NFT_BASE_CHAIN; |
Patrick McHardy | 57de2a0 | 2014-01-09 18:42:31 +0000 | [diff] [blame] | 1486 | basechain->policy = policy; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1487 | } else { |
| 1488 | chain = kzalloc(sizeof(*chain), GFP_KERNEL); |
| 1489 | if (chain == NULL) |
| 1490 | return -ENOMEM; |
| 1491 | } |
| 1492 | |
| 1493 | INIT_LIST_HEAD(&chain->rules); |
| 1494 | chain->handle = nf_tables_alloc_handle(table); |
Pablo Neira Ayuso | b5bc89b | 2013-10-10 16:49:19 +0200 | [diff] [blame] | 1495 | chain->table = table; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1496 | nla_strlcpy(chain->name, name, NFT_CHAIN_MAXNAMELEN); |
| 1497 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 1498 | err = nf_tables_register_hooks(net, table, chain, afi->nops); |
Pablo Neira Ayuso | d8ee8f7 | 2015-06-15 02:42:31 +0200 | [diff] [blame] | 1499 | if (err < 0) |
| 1500 | goto err1; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1501 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 1502 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1503 | err = nft_trans_chain_add(&ctx, NFT_MSG_NEWCHAIN); |
| 1504 | if (err < 0) |
| 1505 | goto err2; |
| 1506 | |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 1507 | table->use++; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1508 | list_add_tail_rcu(&chain->list, &table->chains); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1509 | return 0; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1510 | err2: |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 1511 | nf_tables_unregister_hooks(net, table, chain, afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1512 | err1: |
| 1513 | nf_tables_chain_destroy(chain); |
| 1514 | return err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1515 | } |
| 1516 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 1517 | static int nf_tables_delchain(struct net *net, struct sock *nlsk, |
| 1518 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1519 | const struct nlattr * const nla[]) |
| 1520 | { |
| 1521 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1522 | u8 genmask = nft_genmask_next(net); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 1523 | struct nft_af_info *afi; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1524 | struct nft_table *table; |
| 1525 | struct nft_chain *chain; |
| 1526 | int family = nfmsg->nfgen_family; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1527 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1528 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1529 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1530 | if (IS_ERR(afi)) |
| 1531 | return PTR_ERR(afi); |
| 1532 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1533 | table = nf_tables_table_lookup(afi, nla[NFTA_CHAIN_TABLE], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1534 | if (IS_ERR(table)) |
| 1535 | return PTR_ERR(table); |
| 1536 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 1537 | chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1538 | if (IS_ERR(chain)) |
| 1539 | return PTR_ERR(chain); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 1540 | if (chain->use > 0) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1541 | return -EBUSY; |
| 1542 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 1543 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 1544 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 1545 | return nft_delchain(&ctx); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1546 | } |
| 1547 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1548 | /* |
| 1549 | * Expressions |
| 1550 | */ |
| 1551 | |
| 1552 | /** |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1553 | * nft_register_expr - register nf_tables expr type |
| 1554 | * @ops: expr type |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1555 | * |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1556 | * Registers the expr type for use with nf_tables. Returns zero on |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1557 | * success or a negative errno code otherwise. |
| 1558 | */ |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1559 | int nft_register_expr(struct nft_expr_type *type) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1560 | { |
| 1561 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Tomasz Bursztyka | 758dbce | 2014-04-14 15:41:26 +0300 | [diff] [blame] | 1562 | if (type->family == NFPROTO_UNSPEC) |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1563 | list_add_tail_rcu(&type->list, &nf_tables_expressions); |
Tomasz Bursztyka | 758dbce | 2014-04-14 15:41:26 +0300 | [diff] [blame] | 1564 | else |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1565 | list_add_rcu(&type->list, &nf_tables_expressions); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1566 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 1567 | return 0; |
| 1568 | } |
| 1569 | EXPORT_SYMBOL_GPL(nft_register_expr); |
| 1570 | |
| 1571 | /** |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1572 | * nft_unregister_expr - unregister nf_tables expr type |
| 1573 | * @ops: expr type |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1574 | * |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1575 | * Unregisters the expr typefor use with nf_tables. |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1576 | */ |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1577 | void nft_unregister_expr(struct nft_expr_type *type) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1578 | { |
| 1579 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1580 | list_del_rcu(&type->list); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1581 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 1582 | } |
| 1583 | EXPORT_SYMBOL_GPL(nft_unregister_expr); |
| 1584 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1585 | static const struct nft_expr_type *__nft_expr_type_get(u8 family, |
| 1586 | struct nlattr *nla) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1587 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1588 | const struct nft_expr_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1589 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1590 | list_for_each_entry(type, &nf_tables_expressions, list) { |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1591 | if (!nla_strcmp(nla, type->name) && |
| 1592 | (!type->family || type->family == family)) |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1593 | return type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1594 | } |
| 1595 | return NULL; |
| 1596 | } |
| 1597 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1598 | static const struct nft_expr_type *nft_expr_type_get(u8 family, |
| 1599 | struct nlattr *nla) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1600 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1601 | const struct nft_expr_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1602 | |
| 1603 | if (nla == NULL) |
| 1604 | return ERR_PTR(-EINVAL); |
| 1605 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1606 | type = __nft_expr_type_get(family, nla); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1607 | if (type != NULL && try_module_get(type->owner)) |
| 1608 | return type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1609 | |
| 1610 | #ifdef CONFIG_MODULES |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1611 | if (type == NULL) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1612 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1613 | request_module("nft-expr-%u-%.*s", family, |
| 1614 | nla_len(nla), (char *)nla_data(nla)); |
| 1615 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
| 1616 | if (__nft_expr_type_get(family, nla)) |
| 1617 | return ERR_PTR(-EAGAIN); |
| 1618 | |
| 1619 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1620 | request_module("nft-expr-%.*s", |
| 1621 | nla_len(nla), (char *)nla_data(nla)); |
| 1622 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1623 | if (__nft_expr_type_get(family, nla)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1624 | return ERR_PTR(-EAGAIN); |
| 1625 | } |
| 1626 | #endif |
| 1627 | return ERR_PTR(-ENOENT); |
| 1628 | } |
| 1629 | |
| 1630 | static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = { |
| 1631 | [NFTA_EXPR_NAME] = { .type = NLA_STRING }, |
| 1632 | [NFTA_EXPR_DATA] = { .type = NLA_NESTED }, |
| 1633 | }; |
| 1634 | |
| 1635 | static int nf_tables_fill_expr_info(struct sk_buff *skb, |
| 1636 | const struct nft_expr *expr) |
| 1637 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1638 | if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1639 | goto nla_put_failure; |
| 1640 | |
| 1641 | if (expr->ops->dump) { |
| 1642 | struct nlattr *data = nla_nest_start(skb, NFTA_EXPR_DATA); |
| 1643 | if (data == NULL) |
| 1644 | goto nla_put_failure; |
| 1645 | if (expr->ops->dump(skb, expr) < 0) |
| 1646 | goto nla_put_failure; |
| 1647 | nla_nest_end(skb, data); |
| 1648 | } |
| 1649 | |
| 1650 | return skb->len; |
| 1651 | |
| 1652 | nla_put_failure: |
| 1653 | return -1; |
| 1654 | }; |
| 1655 | |
Patrick McHardy | 0b2d8a7 | 2015-04-11 10:46:38 +0100 | [diff] [blame] | 1656 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, |
| 1657 | const struct nft_expr *expr) |
| 1658 | { |
| 1659 | struct nlattr *nest; |
| 1660 | |
| 1661 | nest = nla_nest_start(skb, attr); |
| 1662 | if (!nest) |
| 1663 | goto nla_put_failure; |
| 1664 | if (nf_tables_fill_expr_info(skb, expr) < 0) |
| 1665 | goto nla_put_failure; |
| 1666 | nla_nest_end(skb, nest); |
| 1667 | return 0; |
| 1668 | |
| 1669 | nla_put_failure: |
| 1670 | return -1; |
| 1671 | } |
| 1672 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1673 | struct nft_expr_info { |
| 1674 | const struct nft_expr_ops *ops; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1675 | struct nlattr *tb[NFT_EXPR_MAXATTR + 1]; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1676 | }; |
| 1677 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1678 | static int nf_tables_expr_parse(const struct nft_ctx *ctx, |
| 1679 | const struct nlattr *nla, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1680 | struct nft_expr_info *info) |
| 1681 | { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1682 | const struct nft_expr_type *type; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1683 | const struct nft_expr_ops *ops; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1684 | struct nlattr *tb[NFTA_EXPR_MAX + 1]; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1685 | int err; |
| 1686 | |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1687 | err = nla_parse_nested(tb, NFTA_EXPR_MAX, nla, nft_expr_policy); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1688 | if (err < 0) |
| 1689 | return err; |
| 1690 | |
Patrick McHardy | 64d4680 | 2014-02-05 15:03:37 +0000 | [diff] [blame] | 1691 | type = nft_expr_type_get(ctx->afi->family, tb[NFTA_EXPR_NAME]); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1692 | if (IS_ERR(type)) |
| 1693 | return PTR_ERR(type); |
| 1694 | |
| 1695 | if (tb[NFTA_EXPR_DATA]) { |
| 1696 | err = nla_parse_nested(info->tb, type->maxattr, |
| 1697 | tb[NFTA_EXPR_DATA], type->policy); |
| 1698 | if (err < 0) |
| 1699 | goto err1; |
| 1700 | } else |
| 1701 | memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1)); |
| 1702 | |
| 1703 | if (type->select_ops != NULL) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1704 | ops = type->select_ops(ctx, |
| 1705 | (const struct nlattr * const *)info->tb); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1706 | if (IS_ERR(ops)) { |
| 1707 | err = PTR_ERR(ops); |
| 1708 | goto err1; |
| 1709 | } |
| 1710 | } else |
| 1711 | ops = type->ops; |
| 1712 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1713 | info->ops = ops; |
| 1714 | return 0; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1715 | |
| 1716 | err1: |
| 1717 | module_put(type->owner); |
| 1718 | return err; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1719 | } |
| 1720 | |
| 1721 | static int nf_tables_newexpr(const struct nft_ctx *ctx, |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1722 | const struct nft_expr_info *info, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1723 | struct nft_expr *expr) |
| 1724 | { |
| 1725 | const struct nft_expr_ops *ops = info->ops; |
| 1726 | int err; |
| 1727 | |
| 1728 | expr->ops = ops; |
| 1729 | if (ops->init) { |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1730 | err = ops->init(ctx, expr, (const struct nlattr **)info->tb); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1731 | if (err < 0) |
| 1732 | goto err1; |
| 1733 | } |
| 1734 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1735 | return 0; |
| 1736 | |
| 1737 | err1: |
| 1738 | expr->ops = NULL; |
| 1739 | return err; |
| 1740 | } |
| 1741 | |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 1742 | static void nf_tables_expr_destroy(const struct nft_ctx *ctx, |
| 1743 | struct nft_expr *expr) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1744 | { |
| 1745 | if (expr->ops->destroy) |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 1746 | expr->ops->destroy(ctx, expr); |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 1747 | module_put(expr->ops->type->owner); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1748 | } |
| 1749 | |
Patrick McHardy | 0b2d8a7 | 2015-04-11 10:46:38 +0100 | [diff] [blame] | 1750 | struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, |
| 1751 | const struct nlattr *nla) |
| 1752 | { |
| 1753 | struct nft_expr_info info; |
| 1754 | struct nft_expr *expr; |
| 1755 | int err; |
| 1756 | |
| 1757 | err = nf_tables_expr_parse(ctx, nla, &info); |
| 1758 | if (err < 0) |
| 1759 | goto err1; |
| 1760 | |
| 1761 | err = -ENOMEM; |
| 1762 | expr = kzalloc(info.ops->size, GFP_KERNEL); |
| 1763 | if (expr == NULL) |
| 1764 | goto err2; |
| 1765 | |
| 1766 | err = nf_tables_newexpr(ctx, &info, expr); |
| 1767 | if (err < 0) |
Liping Zhang | 6cafaf4 | 2016-06-20 21:11:45 +0800 | [diff] [blame] | 1768 | goto err3; |
Patrick McHardy | 0b2d8a7 | 2015-04-11 10:46:38 +0100 | [diff] [blame] | 1769 | |
| 1770 | return expr; |
Liping Zhang | 6cafaf4 | 2016-06-20 21:11:45 +0800 | [diff] [blame] | 1771 | err3: |
| 1772 | kfree(expr); |
Patrick McHardy | 0b2d8a7 | 2015-04-11 10:46:38 +0100 | [diff] [blame] | 1773 | err2: |
| 1774 | module_put(info.ops->type->owner); |
| 1775 | err1: |
| 1776 | return ERR_PTR(err); |
| 1777 | } |
| 1778 | |
| 1779 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr) |
| 1780 | { |
| 1781 | nf_tables_expr_destroy(ctx, expr); |
| 1782 | kfree(expr); |
| 1783 | } |
| 1784 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1785 | /* |
| 1786 | * Rules |
| 1787 | */ |
| 1788 | |
| 1789 | static struct nft_rule *__nf_tables_rule_lookup(const struct nft_chain *chain, |
| 1790 | u64 handle) |
| 1791 | { |
| 1792 | struct nft_rule *rule; |
| 1793 | |
| 1794 | // FIXME: this sucks |
| 1795 | list_for_each_entry(rule, &chain->rules, list) { |
| 1796 | if (handle == rule->handle) |
| 1797 | return rule; |
| 1798 | } |
| 1799 | |
| 1800 | return ERR_PTR(-ENOENT); |
| 1801 | } |
| 1802 | |
| 1803 | static struct nft_rule *nf_tables_rule_lookup(const struct nft_chain *chain, |
| 1804 | const struct nlattr *nla) |
| 1805 | { |
| 1806 | if (nla == NULL) |
| 1807 | return ERR_PTR(-EINVAL); |
| 1808 | |
| 1809 | return __nf_tables_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla))); |
| 1810 | } |
| 1811 | |
| 1812 | static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = { |
| 1813 | [NFTA_RULE_TABLE] = { .type = NLA_STRING }, |
| 1814 | [NFTA_RULE_CHAIN] = { .type = NLA_STRING, |
| 1815 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, |
| 1816 | [NFTA_RULE_HANDLE] = { .type = NLA_U64 }, |
| 1817 | [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 1818 | [NFTA_RULE_COMPAT] = { .type = NLA_NESTED }, |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1819 | [NFTA_RULE_POSITION] = { .type = NLA_U64 }, |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1820 | [NFTA_RULE_USERDATA] = { .type = NLA_BINARY, |
| 1821 | .len = NFT_USERDATA_MAXLEN }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1822 | }; |
| 1823 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1824 | static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net, |
| 1825 | u32 portid, u32 seq, int event, |
| 1826 | u32 flags, int family, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1827 | const struct nft_table *table, |
| 1828 | const struct nft_chain *chain, |
| 1829 | const struct nft_rule *rule) |
| 1830 | { |
| 1831 | struct nlmsghdr *nlh; |
| 1832 | struct nfgenmsg *nfmsg; |
| 1833 | const struct nft_expr *expr, *next; |
| 1834 | struct nlattr *list; |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1835 | const struct nft_rule *prule; |
| 1836 | int type = event | NFNL_SUBSYS_NFTABLES << 8; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1837 | |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1838 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1839 | flags); |
| 1840 | if (nlh == NULL) |
| 1841 | goto nla_put_failure; |
| 1842 | |
| 1843 | nfmsg = nlmsg_data(nlh); |
| 1844 | nfmsg->nfgen_family = family; |
| 1845 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1846 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1847 | |
| 1848 | if (nla_put_string(skb, NFTA_RULE_TABLE, table->name)) |
| 1849 | goto nla_put_failure; |
| 1850 | if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name)) |
| 1851 | goto nla_put_failure; |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 1852 | if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle), |
| 1853 | NFTA_RULE_PAD)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1854 | goto nla_put_failure; |
| 1855 | |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1856 | if ((event != NFT_MSG_DELRULE) && (rule->list.prev != &chain->rules)) { |
| 1857 | prule = list_entry(rule->list.prev, struct nft_rule, list); |
| 1858 | if (nla_put_be64(skb, NFTA_RULE_POSITION, |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 1859 | cpu_to_be64(prule->handle), |
| 1860 | NFTA_RULE_PAD)) |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 1861 | goto nla_put_failure; |
| 1862 | } |
| 1863 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1864 | list = nla_nest_start(skb, NFTA_RULE_EXPRESSIONS); |
| 1865 | if (list == NULL) |
| 1866 | goto nla_put_failure; |
| 1867 | nft_rule_for_each_expr(expr, next, rule) { |
Patrick McHardy | 0b2d8a7 | 2015-04-11 10:46:38 +0100 | [diff] [blame] | 1868 | if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1869 | goto nla_put_failure; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1870 | } |
| 1871 | nla_nest_end(skb, list); |
| 1872 | |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 1873 | if (rule->udata) { |
| 1874 | struct nft_userdata *udata = nft_userdata(rule); |
| 1875 | if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1, |
| 1876 | udata->data) < 0) |
| 1877 | goto nla_put_failure; |
| 1878 | } |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 1879 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1880 | nlmsg_end(skb, nlh); |
| 1881 | return 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1882 | |
| 1883 | nla_put_failure: |
| 1884 | nlmsg_trim(skb, nlh); |
| 1885 | return -1; |
| 1886 | } |
| 1887 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1888 | static int nf_tables_rule_notify(const struct nft_ctx *ctx, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1889 | const struct nft_rule *rule, |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1890 | int event) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1891 | { |
| 1892 | struct sk_buff *skb; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1893 | int err; |
| 1894 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1895 | if (!ctx->report && |
| 1896 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1897 | return 0; |
| 1898 | |
| 1899 | err = -ENOBUFS; |
| 1900 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1901 | if (skb == NULL) |
| 1902 | goto err; |
| 1903 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1904 | err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq, |
| 1905 | event, 0, ctx->afi->family, ctx->table, |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 1906 | ctx->chain, rule); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1907 | if (err < 0) { |
| 1908 | kfree_skb(skb); |
| 1909 | goto err; |
| 1910 | } |
| 1911 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1912 | err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1913 | ctx->report, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1914 | err: |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 1915 | if (err < 0) { |
| 1916 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
| 1917 | err); |
| 1918 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1919 | return err; |
| 1920 | } |
| 1921 | |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 1922 | struct nft_rule_dump_ctx { |
| 1923 | char table[NFT_TABLE_MAXNAMELEN]; |
| 1924 | char chain[NFT_CHAIN_MAXNAMELEN]; |
| 1925 | }; |
| 1926 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1927 | static int nf_tables_dump_rules(struct sk_buff *skb, |
| 1928 | struct netlink_callback *cb) |
| 1929 | { |
| 1930 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 1931 | const struct nft_rule_dump_ctx *ctx = cb->data; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1932 | const struct nft_af_info *afi; |
| 1933 | const struct nft_table *table; |
| 1934 | const struct nft_chain *chain; |
| 1935 | const struct nft_rule *rule; |
| 1936 | unsigned int idx = 0, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 1937 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1938 | int family = nfmsg->nfgen_family; |
| 1939 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1940 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1941 | cb->seq = net->nft.base_seq; |
| 1942 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1943 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1944 | if (family != NFPROTO_UNSPEC && family != afi->family) |
| 1945 | continue; |
| 1946 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1947 | list_for_each_entry_rcu(table, &afi->tables, list) { |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 1948 | if (ctx && ctx->table[0] && |
| 1949 | strcmp(ctx->table, table->name) != 0) |
| 1950 | continue; |
| 1951 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1952 | list_for_each_entry_rcu(chain, &table->chains, list) { |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 1953 | if (ctx && ctx->chain[0] && |
| 1954 | strcmp(ctx->chain, chain->name) != 0) |
| 1955 | continue; |
| 1956 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1957 | list_for_each_entry_rcu(rule, &chain->rules, list) { |
Pablo Neira Ayuso | 889f7ee | 2016-06-12 18:07:07 +0200 | [diff] [blame] | 1958 | if (!nft_is_active(net, rule)) |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 1959 | goto cont; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1960 | if (idx < s_idx) |
| 1961 | goto cont; |
| 1962 | if (idx > s_idx) |
| 1963 | memset(&cb->args[1], 0, |
| 1964 | sizeof(cb->args) - sizeof(cb->args[0])); |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 1965 | 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] | 1966 | cb->nlh->nlmsg_seq, |
| 1967 | NFT_MSG_NEWRULE, |
| 1968 | NLM_F_MULTI | NLM_F_APPEND, |
| 1969 | afi->family, table, chain, rule) < 0) |
| 1970 | goto done; |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 1971 | |
| 1972 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1973 | cont: |
| 1974 | idx++; |
| 1975 | } |
| 1976 | } |
| 1977 | } |
| 1978 | } |
| 1979 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 1980 | rcu_read_unlock(); |
| 1981 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1982 | cb->args[0] = idx; |
| 1983 | return skb->len; |
| 1984 | } |
| 1985 | |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 1986 | static int nf_tables_dump_rules_done(struct netlink_callback *cb) |
| 1987 | { |
| 1988 | kfree(cb->data); |
| 1989 | return 0; |
| 1990 | } |
| 1991 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1992 | static int nf_tables_getrule(struct net *net, struct sock *nlsk, |
| 1993 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1994 | const struct nlattr * const nla[]) |
| 1995 | { |
| 1996 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 1997 | u8 genmask = nft_genmask_cur(net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 1998 | const struct nft_af_info *afi; |
| 1999 | const struct nft_table *table; |
| 2000 | const struct nft_chain *chain; |
| 2001 | const struct nft_rule *rule; |
| 2002 | struct sk_buff *skb2; |
| 2003 | int family = nfmsg->nfgen_family; |
| 2004 | int err; |
| 2005 | |
| 2006 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 2007 | struct netlink_dump_control c = { |
| 2008 | .dump = nf_tables_dump_rules, |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 2009 | .done = nf_tables_dump_rules_done, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2010 | }; |
Pablo Neira Ayuso | 6e1f760 | 2016-07-19 12:20:45 +0200 | [diff] [blame] | 2011 | |
| 2012 | if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) { |
| 2013 | struct nft_rule_dump_ctx *ctx; |
| 2014 | |
| 2015 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
| 2016 | if (!ctx) |
| 2017 | return -ENOMEM; |
| 2018 | |
| 2019 | if (nla[NFTA_RULE_TABLE]) |
| 2020 | nla_strlcpy(ctx->table, nla[NFTA_RULE_TABLE], |
| 2021 | sizeof(ctx->table)); |
| 2022 | if (nla[NFTA_RULE_CHAIN]) |
| 2023 | nla_strlcpy(ctx->chain, nla[NFTA_RULE_CHAIN], |
| 2024 | sizeof(ctx->chain)); |
| 2025 | c.data = ctx; |
| 2026 | } |
| 2027 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2028 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 2029 | } |
| 2030 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2031 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2032 | if (IS_ERR(afi)) |
| 2033 | return PTR_ERR(afi); |
| 2034 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2035 | table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2036 | if (IS_ERR(table)) |
| 2037 | return PTR_ERR(table); |
| 2038 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 2039 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2040 | if (IS_ERR(chain)) |
| 2041 | return PTR_ERR(chain); |
| 2042 | |
| 2043 | rule = nf_tables_rule_lookup(chain, nla[NFTA_RULE_HANDLE]); |
| 2044 | if (IS_ERR(rule)) |
| 2045 | return PTR_ERR(rule); |
| 2046 | |
| 2047 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 2048 | if (!skb2) |
| 2049 | return -ENOMEM; |
| 2050 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 2051 | err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2052 | nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0, |
| 2053 | family, table, chain, rule); |
| 2054 | if (err < 0) |
| 2055 | goto err; |
| 2056 | |
| 2057 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 2058 | |
| 2059 | err: |
| 2060 | kfree_skb(skb2); |
| 2061 | return err; |
| 2062 | } |
| 2063 | |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 2064 | static void nf_tables_rule_destroy(const struct nft_ctx *ctx, |
| 2065 | struct nft_rule *rule) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2066 | { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2067 | struct nft_expr *expr; |
| 2068 | |
| 2069 | /* |
| 2070 | * Careful: some expressions might not be initialized in case this |
| 2071 | * is called on error from nf_tables_newrule(). |
| 2072 | */ |
| 2073 | expr = nft_expr_first(rule); |
Florian Westphal | 0117c75 | 2016-12-13 13:59:33 +0100 | [diff] [blame] | 2074 | while (expr != nft_expr_last(rule) && expr->ops) { |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 2075 | nf_tables_expr_destroy(ctx, expr); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2076 | expr = nft_expr_next(expr); |
| 2077 | } |
| 2078 | kfree(rule); |
| 2079 | } |
| 2080 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2081 | #define NFT_RULE_MAXEXPRS 128 |
| 2082 | |
| 2083 | static struct nft_expr_info *info; |
| 2084 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2085 | static int nf_tables_newrule(struct net *net, struct sock *nlsk, |
| 2086 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2087 | const struct nlattr * const nla[]) |
| 2088 | { |
| 2089 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2090 | u8 genmask = nft_genmask_next(net); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2091 | struct nft_af_info *afi; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2092 | struct nft_table *table; |
| 2093 | struct nft_chain *chain; |
| 2094 | struct nft_rule *rule, *old_rule = NULL; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2095 | struct nft_userdata *udata; |
Pablo Neira Ayuso | 1081d11 | 2014-04-04 01:24:07 +0200 | [diff] [blame] | 2096 | struct nft_trans *trans = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2097 | struct nft_expr *expr; |
| 2098 | struct nft_ctx ctx; |
| 2099 | struct nlattr *tmp; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2100 | unsigned int size, i, n, ulen = 0, usize = 0; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2101 | int err, rem; |
| 2102 | bool create; |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 2103 | u64 handle, pos_handle; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2104 | |
| 2105 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
| 2106 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2107 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, create); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2108 | if (IS_ERR(afi)) |
| 2109 | return PTR_ERR(afi); |
| 2110 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2111 | table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2112 | if (IS_ERR(table)) |
| 2113 | return PTR_ERR(table); |
| 2114 | |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 2115 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2116 | if (IS_ERR(chain)) |
| 2117 | return PTR_ERR(chain); |
| 2118 | |
| 2119 | if (nla[NFTA_RULE_HANDLE]) { |
| 2120 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE])); |
| 2121 | rule = __nf_tables_rule_lookup(chain, handle); |
| 2122 | if (IS_ERR(rule)) |
| 2123 | return PTR_ERR(rule); |
| 2124 | |
| 2125 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 2126 | return -EEXIST; |
| 2127 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 2128 | old_rule = rule; |
| 2129 | else |
| 2130 | return -EOPNOTSUPP; |
| 2131 | } else { |
| 2132 | if (!create || nlh->nlmsg_flags & NLM_F_REPLACE) |
| 2133 | return -EINVAL; |
| 2134 | handle = nf_tables_alloc_handle(table); |
Pablo Neira Ayuso | a0a7379 | 2014-06-10 10:53:01 +0200 | [diff] [blame] | 2135 | |
| 2136 | if (chain->use == UINT_MAX) |
| 2137 | return -EOVERFLOW; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2138 | } |
| 2139 | |
Eric Leblond | 5e94846 | 2013-10-10 13:41:44 +0200 | [diff] [blame] | 2140 | if (nla[NFTA_RULE_POSITION]) { |
| 2141 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) |
| 2142 | return -EOPNOTSUPP; |
| 2143 | |
| 2144 | pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION])); |
| 2145 | old_rule = __nf_tables_rule_lookup(chain, pos_handle); |
| 2146 | if (IS_ERR(old_rule)) |
| 2147 | return PTR_ERR(old_rule); |
| 2148 | } |
| 2149 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2150 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 2151 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2152 | n = 0; |
| 2153 | size = 0; |
| 2154 | if (nla[NFTA_RULE_EXPRESSIONS]) { |
| 2155 | nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) { |
| 2156 | err = -EINVAL; |
| 2157 | if (nla_type(tmp) != NFTA_LIST_ELEM) |
| 2158 | goto err1; |
| 2159 | if (n == NFT_RULE_MAXEXPRS) |
| 2160 | goto err1; |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 2161 | err = nf_tables_expr_parse(&ctx, tmp, &info[n]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2162 | if (err < 0) |
| 2163 | goto err1; |
| 2164 | size += info[n].ops->size; |
| 2165 | n++; |
| 2166 | } |
| 2167 | } |
Patrick McHardy | 9889840 | 2015-03-03 20:04:19 +0000 | [diff] [blame] | 2168 | /* Check for overflow of dlen field */ |
| 2169 | err = -EFBIG; |
| 2170 | if (size >= 1 << 12) |
| 2171 | goto err1; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2172 | |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2173 | if (nla[NFTA_RULE_USERDATA]) { |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 2174 | ulen = nla_len(nla[NFTA_RULE_USERDATA]); |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2175 | if (ulen > 0) |
| 2176 | usize = sizeof(struct nft_userdata) + ulen; |
| 2177 | } |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 2178 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2179 | err = -ENOMEM; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2180 | rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2181 | if (rule == NULL) |
| 2182 | goto err1; |
| 2183 | |
Pablo Neira Ayuso | 889f7ee | 2016-06-12 18:07:07 +0200 | [diff] [blame] | 2184 | nft_activate_next(net, rule); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2185 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2186 | rule->handle = handle; |
| 2187 | rule->dlen = size; |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2188 | rule->udata = ulen ? 1 : 0; |
Pablo Neira Ayuso | 0768b3b | 2014-02-19 17:27:06 +0100 | [diff] [blame] | 2189 | |
Patrick McHardy | 86f1ec3 | 2015-03-03 20:04:20 +0000 | [diff] [blame] | 2190 | if (ulen) { |
| 2191 | udata = nft_userdata(rule); |
| 2192 | udata->len = ulen - 1; |
| 2193 | nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen); |
| 2194 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2195 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2196 | expr = nft_expr_first(rule); |
| 2197 | for (i = 0; i < n; i++) { |
| 2198 | err = nf_tables_newexpr(&ctx, &info[i], expr); |
| 2199 | if (err < 0) |
| 2200 | goto err2; |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 2201 | info[i].ops = NULL; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2202 | expr = nft_expr_next(expr); |
| 2203 | } |
| 2204 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2205 | if (nlh->nlmsg_flags & NLM_F_REPLACE) { |
Florian Westphal | f32bb2a | 2018-04-10 09:30:27 +0200 | [diff] [blame] | 2206 | if (!nft_is_active_next(net, old_rule)) { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2207 | err = -ENOENT; |
| 2208 | goto err2; |
| 2209 | } |
Florian Westphal | f32bb2a | 2018-04-10 09:30:27 +0200 | [diff] [blame] | 2210 | trans = nft_trans_rule_add(&ctx, NFT_MSG_DELRULE, |
| 2211 | old_rule); |
| 2212 | if (trans == NULL) { |
| 2213 | err = -ENOMEM; |
| 2214 | goto err2; |
| 2215 | } |
| 2216 | nft_deactivate_next(net, old_rule); |
| 2217 | chain->use--; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2218 | |
Florian Westphal | f32bb2a | 2018-04-10 09:30:27 +0200 | [diff] [blame] | 2219 | if (nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule) == NULL) { |
| 2220 | err = -ENOMEM; |
| 2221 | goto err2; |
| 2222 | } |
| 2223 | |
| 2224 | list_add_tail_rcu(&rule->list, &old_rule->list); |
| 2225 | } else { |
| 2226 | if (nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule) == NULL) { |
| 2227 | err = -ENOMEM; |
| 2228 | goto err2; |
| 2229 | } |
| 2230 | |
| 2231 | if (nlh->nlmsg_flags & NLM_F_APPEND) { |
| 2232 | if (old_rule) |
| 2233 | list_add_rcu(&rule->list, &old_rule->list); |
| 2234 | else |
| 2235 | list_add_tail_rcu(&rule->list, &chain->rules); |
| 2236 | } else { |
| 2237 | if (old_rule) |
| 2238 | list_add_tail_rcu(&rule->list, &old_rule->list); |
| 2239 | else |
| 2240 | list_add_rcu(&rule->list, &chain->rules); |
| 2241 | } |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2242 | } |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 2243 | chain->use++; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2244 | return 0; |
| 2245 | |
| 2246 | err2: |
Patrick McHardy | 62472bc | 2014-03-07 19:08:30 +0100 | [diff] [blame] | 2247 | nf_tables_rule_destroy(&ctx, rule); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2248 | err1: |
| 2249 | for (i = 0; i < n; i++) { |
| 2250 | if (info[i].ops != NULL) |
Patrick McHardy | ef1f7df | 2013-10-10 11:41:20 +0200 | [diff] [blame] | 2251 | module_put(info[i].ops->type->owner); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2252 | } |
| 2253 | return err; |
| 2254 | } |
| 2255 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2256 | static int nf_tables_delrule(struct net *net, struct sock *nlsk, |
| 2257 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2258 | const struct nlattr * const nla[]) |
| 2259 | { |
| 2260 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2261 | u8 genmask = nft_genmask_next(net); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2262 | struct nft_af_info *afi; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2263 | struct nft_table *table; |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2264 | struct nft_chain *chain = NULL; |
| 2265 | struct nft_rule *rule; |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2266 | int family = nfmsg->nfgen_family, err = 0; |
| 2267 | struct nft_ctx ctx; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2268 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2269 | afi = nf_tables_afinfo_lookup(net, family, false); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2270 | if (IS_ERR(afi)) |
| 2271 | return PTR_ERR(afi); |
| 2272 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2273 | table = nf_tables_table_lookup(afi, nla[NFTA_RULE_TABLE], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2274 | if (IS_ERR(table)) |
| 2275 | return PTR_ERR(table); |
| 2276 | |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2277 | if (nla[NFTA_RULE_CHAIN]) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 2278 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], |
| 2279 | genmask); |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2280 | if (IS_ERR(chain)) |
| 2281 | return PTR_ERR(chain); |
| 2282 | } |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2283 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2284 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2285 | |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2286 | if (chain) { |
| 2287 | if (nla[NFTA_RULE_HANDLE]) { |
| 2288 | rule = nf_tables_rule_lookup(chain, |
| 2289 | nla[NFTA_RULE_HANDLE]); |
| 2290 | if (IS_ERR(rule)) |
| 2291 | return PTR_ERR(rule); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2292 | |
Arturo Borrero | 5e266fe | 2014-09-02 16:42:21 +0200 | [diff] [blame] | 2293 | err = nft_delrule(&ctx, rule); |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2294 | } else { |
Arturo Borrero | ce24b72 | 2014-09-02 16:42:24 +0200 | [diff] [blame] | 2295 | err = nft_delrule_by_chain(&ctx); |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2296 | } |
| 2297 | } else { |
| 2298 | list_for_each_entry(chain, &table->chains, list) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 2299 | if (!nft_is_active_next(net, chain)) |
| 2300 | continue; |
| 2301 | |
Pablo Neira Ayuso | cf9dc09 | 2013-11-24 20:39:10 +0100 | [diff] [blame] | 2302 | ctx.chain = chain; |
Arturo Borrero | ce24b72 | 2014-09-02 16:42:24 +0200 | [diff] [blame] | 2303 | err = nft_delrule_by_chain(&ctx); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2304 | if (err < 0) |
| 2305 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 2306 | } |
| 2307 | } |
| 2308 | |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 2309 | return err; |
| 2310 | } |
| 2311 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2312 | /* |
| 2313 | * Sets |
| 2314 | */ |
| 2315 | |
| 2316 | static LIST_HEAD(nf_tables_set_ops); |
| 2317 | |
| 2318 | int nft_register_set(struct nft_set_ops *ops) |
| 2319 | { |
| 2320 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2321 | list_add_tail_rcu(&ops->list, &nf_tables_set_ops); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2322 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 2323 | return 0; |
| 2324 | } |
| 2325 | EXPORT_SYMBOL_GPL(nft_register_set); |
| 2326 | |
| 2327 | void nft_unregister_set(struct nft_set_ops *ops) |
| 2328 | { |
| 2329 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2330 | list_del_rcu(&ops->list); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2331 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 2332 | } |
| 2333 | EXPORT_SYMBOL_GPL(nft_unregister_set); |
| 2334 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2335 | /* |
| 2336 | * Select a set implementation based on the data characteristics and the |
| 2337 | * given policy. The total memory use might not be known if no size is |
| 2338 | * given, in that case the amount of memory per element is used. |
| 2339 | */ |
| 2340 | static const struct nft_set_ops * |
| 2341 | nft_select_set_ops(const struct nlattr * const nla[], |
| 2342 | const struct nft_set_desc *desc, |
| 2343 | enum nft_set_policies policy) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2344 | { |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2345 | const struct nft_set_ops *ops, *bops; |
| 2346 | struct nft_set_estimate est, best; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2347 | u32 features; |
| 2348 | |
| 2349 | #ifdef CONFIG_MODULES |
| 2350 | if (list_empty(&nf_tables_set_ops)) { |
| 2351 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
| 2352 | request_module("nft-set"); |
| 2353 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
| 2354 | if (!list_empty(&nf_tables_set_ops)) |
| 2355 | return ERR_PTR(-EAGAIN); |
| 2356 | } |
| 2357 | #endif |
| 2358 | features = 0; |
| 2359 | if (nla[NFTA_SET_FLAGS] != NULL) { |
| 2360 | features = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); |
Patrick McHardy | 4a8678e | 2015-04-05 14:41:05 +0200 | [diff] [blame] | 2361 | features &= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_TIMEOUT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2362 | } |
| 2363 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2364 | bops = NULL; |
| 2365 | best.size = ~0; |
| 2366 | best.class = ~0; |
| 2367 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2368 | list_for_each_entry(ops, &nf_tables_set_ops, list) { |
| 2369 | if ((ops->features & features) != features) |
| 2370 | continue; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2371 | if (!ops->estimate(desc, features, &est)) |
| 2372 | continue; |
| 2373 | |
| 2374 | switch (policy) { |
| 2375 | case NFT_SET_POL_PERFORMANCE: |
| 2376 | if (est.class < best.class) |
| 2377 | break; |
| 2378 | if (est.class == best.class && est.size < best.size) |
| 2379 | break; |
| 2380 | continue; |
| 2381 | case NFT_SET_POL_MEMORY: |
| 2382 | if (est.size < best.size) |
| 2383 | break; |
| 2384 | if (est.size == best.size && est.class < best.class) |
| 2385 | break; |
| 2386 | continue; |
| 2387 | default: |
| 2388 | break; |
| 2389 | } |
| 2390 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2391 | if (!try_module_get(ops->owner)) |
| 2392 | continue; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2393 | if (bops != NULL) |
| 2394 | module_put(bops->owner); |
| 2395 | |
| 2396 | bops = ops; |
| 2397 | best = est; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2398 | } |
| 2399 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2400 | if (bops != NULL) |
| 2401 | return bops; |
| 2402 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2403 | return ERR_PTR(-EOPNOTSUPP); |
| 2404 | } |
| 2405 | |
| 2406 | static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = { |
| 2407 | [NFTA_SET_TABLE] = { .type = NLA_STRING }, |
Pablo Neira Ayuso | a9bdd83 | 2014-03-24 15:10:37 +0100 | [diff] [blame] | 2408 | [NFTA_SET_NAME] = { .type = NLA_STRING, |
Pablo Neira Ayuso | cb39ad8 | 2016-05-04 17:49:53 +0200 | [diff] [blame] | 2409 | .len = NFT_SET_MAXNAMELEN - 1 }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2410 | [NFTA_SET_FLAGS] = { .type = NLA_U32 }, |
| 2411 | [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 }, |
| 2412 | [NFTA_SET_KEY_LEN] = { .type = NLA_U32 }, |
| 2413 | [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 }, |
| 2414 | [NFTA_SET_DATA_LEN] = { .type = NLA_U32 }, |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2415 | [NFTA_SET_POLICY] = { .type = NLA_U32 }, |
| 2416 | [NFTA_SET_DESC] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2417 | [NFTA_SET_ID] = { .type = NLA_U32 }, |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2418 | [NFTA_SET_TIMEOUT] = { .type = NLA_U64 }, |
| 2419 | [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 }, |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2420 | [NFTA_SET_USERDATA] = { .type = NLA_BINARY, |
| 2421 | .len = NFT_USERDATA_MAXLEN }, |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2422 | }; |
| 2423 | |
| 2424 | static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = { |
| 2425 | [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2426 | }; |
| 2427 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2428 | static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, struct net *net, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2429 | const struct sk_buff *skb, |
| 2430 | const struct nlmsghdr *nlh, |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2431 | const struct nlattr * const nla[], |
| 2432 | u8 genmask) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2433 | { |
| 2434 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2435 | struct nft_af_info *afi = NULL; |
| 2436 | struct nft_table *table = NULL; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2437 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2438 | if (nfmsg->nfgen_family != NFPROTO_UNSPEC) { |
| 2439 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false); |
| 2440 | if (IS_ERR(afi)) |
| 2441 | return PTR_ERR(afi); |
| 2442 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2443 | |
| 2444 | if (nla[NFTA_SET_TABLE] != NULL) { |
Patrick McHardy | ec2c993 | 2014-02-05 15:03:35 +0000 | [diff] [blame] | 2445 | if (afi == NULL) |
| 2446 | return -EAFNOSUPPORT; |
| 2447 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2448 | table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE], |
| 2449 | genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2450 | if (IS_ERR(table)) |
| 2451 | return PTR_ERR(table); |
| 2452 | } |
| 2453 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2454 | nft_ctx_init(ctx, net, skb, nlh, afi, table, NULL, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2455 | return 0; |
| 2456 | } |
| 2457 | |
| 2458 | struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2459 | const struct nlattr *nla, u8 genmask) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2460 | { |
| 2461 | struct nft_set *set; |
| 2462 | |
| 2463 | if (nla == NULL) |
| 2464 | return ERR_PTR(-EINVAL); |
| 2465 | |
| 2466 | list_for_each_entry(set, &table->sets, list) { |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2467 | if (!nla_strcmp(nla, set->name) && |
| 2468 | nft_active_genmask(set, genmask)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2469 | return set; |
| 2470 | } |
| 2471 | return ERR_PTR(-ENOENT); |
| 2472 | } |
| 2473 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2474 | struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2475 | const struct nlattr *nla, |
| 2476 | u8 genmask) |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2477 | { |
| 2478 | struct nft_trans *trans; |
| 2479 | u32 id = ntohl(nla_get_be32(nla)); |
| 2480 | |
| 2481 | list_for_each_entry(trans, &net->nft.commit_list, list) { |
Alexey Kodanev | 759fb7f | 2018-05-31 19:53:33 +0300 | [diff] [blame] | 2482 | if (trans->msg_type == NFT_MSG_NEWSET) { |
| 2483 | struct nft_set *set = nft_trans_set(trans); |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2484 | |
Alexey Kodanev | 759fb7f | 2018-05-31 19:53:33 +0300 | [diff] [blame] | 2485 | if (id == nft_trans_set_id(trans) && |
| 2486 | nft_active_genmask(set, genmask)) |
| 2487 | return set; |
| 2488 | } |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2489 | } |
| 2490 | return ERR_PTR(-ENOENT); |
| 2491 | } |
| 2492 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2493 | static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set, |
| 2494 | const char *name) |
| 2495 | { |
| 2496 | const struct nft_set *i; |
| 2497 | const char *p; |
| 2498 | unsigned long *inuse; |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2499 | unsigned int n = 0, min = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2500 | |
Pablo Neira Ayuso | cb39ad8 | 2016-05-04 17:49:53 +0200 | [diff] [blame] | 2501 | p = strnchr(name, NFT_SET_MAXNAMELEN, '%'); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2502 | if (p != NULL) { |
| 2503 | if (p[1] != 'd' || strchr(p + 2, '%')) |
| 2504 | return -EINVAL; |
| 2505 | |
| 2506 | inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL); |
| 2507 | if (inuse == NULL) |
| 2508 | return -ENOMEM; |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2509 | cont: |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2510 | list_for_each_entry(i, &ctx->table->sets, list) { |
Daniel Borkmann | 1466291 | 2013-12-31 12:40:05 +0100 | [diff] [blame] | 2511 | int tmp; |
| 2512 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2513 | if (!nft_is_active_next(ctx->net, set)) |
| 2514 | continue; |
Daniel Borkmann | 1466291 | 2013-12-31 12:40:05 +0100 | [diff] [blame] | 2515 | if (!sscanf(i->name, name, &tmp)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2516 | continue; |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2517 | if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2518 | continue; |
Daniel Borkmann | 1466291 | 2013-12-31 12:40:05 +0100 | [diff] [blame] | 2519 | |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2520 | set_bit(tmp - min, inuse); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2521 | } |
| 2522 | |
Patrick McHardy | 53b7028 | 2014-02-05 12:26:22 +0100 | [diff] [blame] | 2523 | n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE); |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2524 | if (n >= BITS_PER_BYTE * PAGE_SIZE) { |
| 2525 | min += BITS_PER_BYTE * PAGE_SIZE; |
| 2526 | memset(inuse, 0, PAGE_SIZE); |
| 2527 | goto cont; |
| 2528 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2529 | free_page((unsigned long)inuse); |
| 2530 | } |
| 2531 | |
Patrick McHardy | 60eb189 | 2014-03-07 12:34:05 +0100 | [diff] [blame] | 2532 | snprintf(set->name, sizeof(set->name), name, min + n); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2533 | list_for_each_entry(i, &ctx->table->sets, list) { |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2534 | if (!nft_is_active_next(ctx->net, i)) |
| 2535 | continue; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2536 | if (!strcmp(set->name, i->name)) |
| 2537 | return -ENFILE; |
| 2538 | } |
| 2539 | return 0; |
| 2540 | } |
| 2541 | |
| 2542 | static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx, |
| 2543 | const struct nft_set *set, u16 event, u16 flags) |
| 2544 | { |
| 2545 | struct nfgenmsg *nfmsg; |
| 2546 | struct nlmsghdr *nlh; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2547 | struct nlattr *desc; |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2548 | u32 portid = ctx->portid; |
| 2549 | u32 seq = ctx->seq; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2550 | |
| 2551 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 2552 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
| 2553 | flags); |
| 2554 | if (nlh == NULL) |
| 2555 | goto nla_put_failure; |
| 2556 | |
| 2557 | nfmsg = nlmsg_data(nlh); |
| 2558 | nfmsg->nfgen_family = ctx->afi->family; |
| 2559 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 2560 | nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2561 | |
| 2562 | if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name)) |
| 2563 | goto nla_put_failure; |
| 2564 | if (nla_put_string(skb, NFTA_SET_NAME, set->name)) |
| 2565 | goto nla_put_failure; |
| 2566 | if (set->flags != 0) |
| 2567 | if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags))) |
| 2568 | goto nla_put_failure; |
| 2569 | |
| 2570 | if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype))) |
| 2571 | goto nla_put_failure; |
| 2572 | if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen))) |
| 2573 | goto nla_put_failure; |
| 2574 | if (set->flags & NFT_SET_MAP) { |
| 2575 | if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype))) |
| 2576 | goto nla_put_failure; |
| 2577 | if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen))) |
| 2578 | goto nla_put_failure; |
| 2579 | } |
| 2580 | |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2581 | if (set->timeout && |
Anders K. Pedersen | d3e2a11 | 2016-11-20 16:38:47 +0000 | [diff] [blame] | 2582 | nla_put_be64(skb, NFTA_SET_TIMEOUT, |
| 2583 | cpu_to_be64(jiffies_to_msecs(set->timeout)), |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 2584 | NFTA_SET_PAD)) |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2585 | goto nla_put_failure; |
| 2586 | if (set->gc_int && |
| 2587 | nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int))) |
| 2588 | goto nla_put_failure; |
| 2589 | |
Arturo Borrero | 9363dc4 | 2014-09-23 13:30:41 +0200 | [diff] [blame] | 2590 | if (set->policy != NFT_SET_POL_PERFORMANCE) { |
| 2591 | if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy))) |
| 2592 | goto nla_put_failure; |
| 2593 | } |
| 2594 | |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2595 | if (nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata)) |
| 2596 | goto nla_put_failure; |
| 2597 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2598 | desc = nla_nest_start(skb, NFTA_SET_DESC); |
| 2599 | if (desc == NULL) |
| 2600 | goto nla_put_failure; |
| 2601 | if (set->size && |
| 2602 | nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size))) |
| 2603 | goto nla_put_failure; |
| 2604 | nla_nest_end(skb, desc); |
| 2605 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 2606 | nlmsg_end(skb, nlh); |
| 2607 | return 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2608 | |
| 2609 | nla_put_failure: |
| 2610 | nlmsg_trim(skb, nlh); |
| 2611 | return -1; |
| 2612 | } |
| 2613 | |
| 2614 | static int nf_tables_set_notify(const struct nft_ctx *ctx, |
| 2615 | const struct nft_set *set, |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2616 | int event, gfp_t gfp_flags) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2617 | { |
| 2618 | struct sk_buff *skb; |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2619 | u32 portid = ctx->portid; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2620 | int err; |
| 2621 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2622 | if (!ctx->report && |
| 2623 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2624 | return 0; |
| 2625 | |
| 2626 | err = -ENOBUFS; |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2627 | skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2628 | if (skb == NULL) |
| 2629 | goto err; |
| 2630 | |
| 2631 | err = nf_tables_fill_set(skb, ctx, set, event, 0); |
| 2632 | if (err < 0) { |
| 2633 | kfree_skb(skb); |
| 2634 | goto err; |
| 2635 | } |
| 2636 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 2637 | err = nfnetlink_send(skb, ctx->net, portid, NFNLGRP_NFTABLES, |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2638 | ctx->report, gfp_flags); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2639 | err: |
| 2640 | if (err < 0) |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2641 | nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, err); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2642 | return err; |
| 2643 | } |
| 2644 | |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2645 | 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] | 2646 | { |
| 2647 | const struct nft_set *set; |
| 2648 | unsigned int idx, s_idx = cb->args[0]; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2649 | struct nft_af_info *afi; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2650 | struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2]; |
| 2651 | struct net *net = sock_net(skb->sk); |
| 2652 | int cur_family = cb->args[3]; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2653 | struct nft_ctx *ctx = cb->data, ctx_set; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2654 | |
| 2655 | if (cb->args[1]) |
| 2656 | return skb->len; |
| 2657 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2658 | rcu_read_lock(); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 2659 | cb->seq = net->nft.base_seq; |
| 2660 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2661 | list_for_each_entry_rcu(afi, &net->nft.af_info, list) { |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2662 | if (ctx->afi && ctx->afi != afi) |
| 2663 | continue; |
| 2664 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2665 | if (cur_family) { |
| 2666 | if (afi->family != cur_family) |
| 2667 | continue; |
| 2668 | |
| 2669 | cur_family = 0; |
| 2670 | } |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2671 | list_for_each_entry_rcu(table, &afi->tables, list) { |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2672 | if (ctx->table && ctx->table != table) |
| 2673 | continue; |
| 2674 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2675 | if (cur_table) { |
| 2676 | if (cur_table != table) |
| 2677 | continue; |
| 2678 | |
| 2679 | cur_table = NULL; |
| 2680 | } |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2681 | idx = 0; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2682 | list_for_each_entry_rcu(set, &table->sets, list) { |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2683 | if (idx < s_idx) |
| 2684 | goto cont; |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2685 | if (!nft_is_active(net, set)) |
| 2686 | goto cont; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2687 | |
| 2688 | ctx_set = *ctx; |
| 2689 | ctx_set.table = table; |
| 2690 | ctx_set.afi = afi; |
| 2691 | if (nf_tables_fill_set(skb, &ctx_set, set, |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2692 | NFT_MSG_NEWSET, |
| 2693 | NLM_F_MULTI) < 0) { |
| 2694 | cb->args[0] = idx; |
| 2695 | cb->args[2] = (unsigned long) table; |
| 2696 | cb->args[3] = afi->family; |
| 2697 | goto done; |
| 2698 | } |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 2699 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2700 | cont: |
| 2701 | idx++; |
| 2702 | } |
| 2703 | if (s_idx) |
| 2704 | s_idx = 0; |
| 2705 | } |
| 2706 | } |
| 2707 | cb->args[1] = 1; |
| 2708 | done: |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2709 | rcu_read_unlock(); |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2710 | return skb->len; |
| 2711 | } |
| 2712 | |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2713 | static int nf_tables_dump_sets_done(struct netlink_callback *cb) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2714 | { |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2715 | kfree(cb->data); |
| 2716 | return 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2717 | } |
| 2718 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2719 | static int nf_tables_getset(struct net *net, struct sock *nlsk, |
| 2720 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2721 | const struct nlattr * const nla[]) |
| 2722 | { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2723 | u8 genmask = nft_genmask_cur(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2724 | const struct nft_set *set; |
| 2725 | struct nft_ctx ctx; |
| 2726 | struct sk_buff *skb2; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2727 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2728 | int err; |
| 2729 | |
stephen hemminger | 01cfa0a | 2014-10-29 22:57:19 -0700 | [diff] [blame] | 2730 | /* Verify existence before starting dump */ |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2731 | err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla, genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2732 | if (err < 0) |
| 2733 | return err; |
| 2734 | |
| 2735 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 2736 | struct netlink_dump_control c = { |
| 2737 | .dump = nf_tables_dump_sets, |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2738 | .done = nf_tables_dump_sets_done, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2739 | }; |
Pablo Neira Ayuso | 5b96af7 | 2014-07-16 17:35:18 +0200 | [diff] [blame] | 2740 | struct nft_ctx *ctx_dump; |
| 2741 | |
| 2742 | ctx_dump = kmalloc(sizeof(*ctx_dump), GFP_KERNEL); |
| 2743 | if (ctx_dump == NULL) |
| 2744 | return -ENOMEM; |
| 2745 | |
| 2746 | *ctx_dump = ctx; |
| 2747 | c.data = ctx_dump; |
| 2748 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2749 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 2750 | } |
| 2751 | |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2752 | /* Only accept unspec with dump */ |
| 2753 | if (nfmsg->nfgen_family == NFPROTO_UNSPEC) |
| 2754 | return -EAFNOSUPPORT; |
Phil Turnbull | eaa2bcd | 2016-05-27 13:34:04 -0400 | [diff] [blame] | 2755 | if (!nla[NFTA_SET_TABLE]) |
| 2756 | return -EINVAL; |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 2757 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2758 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME], genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2759 | if (IS_ERR(set)) |
| 2760 | return PTR_ERR(set); |
| 2761 | |
| 2762 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 2763 | if (skb2 == NULL) |
| 2764 | return -ENOMEM; |
| 2765 | |
| 2766 | err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0); |
| 2767 | if (err < 0) |
| 2768 | goto err; |
| 2769 | |
| 2770 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 2771 | |
| 2772 | err: |
| 2773 | kfree_skb(skb2); |
| 2774 | return err; |
| 2775 | } |
| 2776 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2777 | static int nf_tables_set_desc_parse(const struct nft_ctx *ctx, |
| 2778 | struct nft_set_desc *desc, |
| 2779 | const struct nlattr *nla) |
| 2780 | { |
| 2781 | struct nlattr *da[NFTA_SET_DESC_MAX + 1]; |
| 2782 | int err; |
| 2783 | |
| 2784 | err = nla_parse_nested(da, NFTA_SET_DESC_MAX, nla, nft_set_desc_policy); |
| 2785 | if (err < 0) |
| 2786 | return err; |
| 2787 | |
| 2788 | if (da[NFTA_SET_DESC_SIZE] != NULL) |
| 2789 | desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE])); |
| 2790 | |
| 2791 | return 0; |
| 2792 | } |
| 2793 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2794 | static int nf_tables_newset(struct net *net, struct sock *nlsk, |
| 2795 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2796 | const struct nlattr * const nla[]) |
| 2797 | { |
| 2798 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2799 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2800 | const struct nft_set_ops *ops; |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 2801 | struct nft_af_info *afi; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2802 | struct nft_table *table; |
| 2803 | struct nft_set *set; |
| 2804 | struct nft_ctx ctx; |
Pablo Neira Ayuso | cb39ad8 | 2016-05-04 17:49:53 +0200 | [diff] [blame] | 2805 | char name[NFT_SET_MAXNAMELEN]; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2806 | unsigned int size; |
| 2807 | bool create; |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2808 | u64 timeout; |
| 2809 | u32 ktype, dtype, flags, policy, gc_int; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2810 | struct nft_set_desc desc; |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2811 | unsigned char *udata; |
| 2812 | u16 udlen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2813 | int err; |
| 2814 | |
| 2815 | if (nla[NFTA_SET_TABLE] == NULL || |
| 2816 | nla[NFTA_SET_NAME] == NULL || |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2817 | nla[NFTA_SET_KEY_LEN] == NULL || |
| 2818 | nla[NFTA_SET_ID] == NULL) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2819 | return -EINVAL; |
| 2820 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2821 | memset(&desc, 0, sizeof(desc)); |
| 2822 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2823 | ktype = NFT_DATA_VALUE; |
| 2824 | if (nla[NFTA_SET_KEY_TYPE] != NULL) { |
| 2825 | ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE])); |
| 2826 | if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK) |
| 2827 | return -EINVAL; |
| 2828 | } |
| 2829 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2830 | desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN])); |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 2831 | if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2832 | return -EINVAL; |
| 2833 | |
| 2834 | flags = 0; |
| 2835 | if (nla[NFTA_SET_FLAGS] != NULL) { |
| 2836 | flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); |
| 2837 | if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT | |
Patrick McHardy | 7c6c6e9 | 2015-04-11 10:46:41 +0100 | [diff] [blame] | 2838 | NFT_SET_INTERVAL | NFT_SET_TIMEOUT | |
| 2839 | NFT_SET_MAP | NFT_SET_EVAL)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2840 | return -EINVAL; |
Patrick McHardy | 7c6c6e9 | 2015-04-11 10:46:41 +0100 | [diff] [blame] | 2841 | /* Only one of both operations is supported */ |
| 2842 | if ((flags & (NFT_SET_MAP | NFT_SET_EVAL)) == |
| 2843 | (NFT_SET_MAP | NFT_SET_EVAL)) |
| 2844 | return -EOPNOTSUPP; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2845 | } |
| 2846 | |
| 2847 | dtype = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2848 | if (nla[NFTA_SET_DATA_TYPE] != NULL) { |
| 2849 | if (!(flags & NFT_SET_MAP)) |
| 2850 | return -EINVAL; |
| 2851 | |
| 2852 | dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE])); |
| 2853 | if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK && |
| 2854 | dtype != NFT_DATA_VERDICT) |
| 2855 | return -EINVAL; |
| 2856 | |
| 2857 | if (dtype != NFT_DATA_VERDICT) { |
| 2858 | if (nla[NFTA_SET_DATA_LEN] == NULL) |
| 2859 | return -EINVAL; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2860 | desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN])); |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 2861 | if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2862 | return -EINVAL; |
| 2863 | } else |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 2864 | desc.dlen = sizeof(struct nft_verdict); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2865 | } else if (flags & NFT_SET_MAP) |
| 2866 | return -EINVAL; |
| 2867 | |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2868 | timeout = 0; |
| 2869 | if (nla[NFTA_SET_TIMEOUT] != NULL) { |
| 2870 | if (!(flags & NFT_SET_TIMEOUT)) |
| 2871 | return -EINVAL; |
Anders K. Pedersen | d3e2a11 | 2016-11-20 16:38:47 +0000 | [diff] [blame] | 2872 | timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64( |
| 2873 | nla[NFTA_SET_TIMEOUT]))); |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2874 | } |
| 2875 | gc_int = 0; |
| 2876 | if (nla[NFTA_SET_GC_INTERVAL] != NULL) { |
| 2877 | if (!(flags & NFT_SET_TIMEOUT)) |
| 2878 | return -EINVAL; |
| 2879 | gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL])); |
| 2880 | } |
| 2881 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2882 | policy = NFT_SET_POL_PERFORMANCE; |
| 2883 | if (nla[NFTA_SET_POLICY] != NULL) |
| 2884 | policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY])); |
| 2885 | |
| 2886 | if (nla[NFTA_SET_DESC] != NULL) { |
| 2887 | err = nf_tables_set_desc_parse(&ctx, &desc, nla[NFTA_SET_DESC]); |
| 2888 | if (err < 0) |
| 2889 | return err; |
| 2890 | } |
| 2891 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2892 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
| 2893 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 2894 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, create); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2895 | if (IS_ERR(afi)) |
| 2896 | return PTR_ERR(afi); |
| 2897 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 2898 | table = nf_tables_table_lookup(afi, nla[NFTA_SET_TABLE], genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2899 | if (IS_ERR(table)) |
| 2900 | return PTR_ERR(table); |
| 2901 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2902 | nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2903 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 2904 | set = nf_tables_set_lookup(table, nla[NFTA_SET_NAME], genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2905 | if (IS_ERR(set)) { |
| 2906 | if (PTR_ERR(set) != -ENOENT) |
| 2907 | return PTR_ERR(set); |
| 2908 | set = NULL; |
| 2909 | } |
| 2910 | |
| 2911 | if (set != NULL) { |
| 2912 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
| 2913 | return -EEXIST; |
| 2914 | if (nlh->nlmsg_flags & NLM_F_REPLACE) |
| 2915 | return -EOPNOTSUPP; |
| 2916 | return 0; |
| 2917 | } |
| 2918 | |
| 2919 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) |
| 2920 | return -ENOENT; |
| 2921 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2922 | ops = nft_select_set_ops(nla, &desc, policy); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2923 | if (IS_ERR(ops)) |
| 2924 | return PTR_ERR(ops); |
| 2925 | |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2926 | udlen = 0; |
| 2927 | if (nla[NFTA_SET_USERDATA]) |
| 2928 | udlen = nla_len(nla[NFTA_SET_USERDATA]); |
| 2929 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2930 | size = 0; |
| 2931 | if (ops->privsize != NULL) |
| 2932 | size = ops->privsize(nla); |
| 2933 | |
| 2934 | err = -ENOMEM; |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2935 | set = kzalloc(sizeof(*set) + size + udlen, GFP_KERNEL); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2936 | if (set == NULL) |
| 2937 | goto err1; |
| 2938 | |
| 2939 | nla_strlcpy(name, nla[NFTA_SET_NAME], sizeof(set->name)); |
| 2940 | err = nf_tables_set_alloc_name(&ctx, set, name); |
| 2941 | if (err < 0) |
| 2942 | goto err2; |
| 2943 | |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2944 | udata = NULL; |
| 2945 | if (udlen) { |
| 2946 | udata = set->data + size; |
| 2947 | nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen); |
| 2948 | } |
| 2949 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2950 | INIT_LIST_HEAD(&set->bindings); |
| 2951 | set->ops = ops; |
| 2952 | set->ktype = ktype; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2953 | set->klen = desc.klen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2954 | set->dtype = dtype; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2955 | set->dlen = desc.dlen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2956 | set->flags = flags; |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2957 | set->size = desc.size; |
Arturo Borrero | 9363dc4 | 2014-09-23 13:30:41 +0200 | [diff] [blame] | 2958 | set->policy = policy; |
Carlos Falgueras GarcÃa | e6d8eca | 2016-01-05 14:03:32 +0100 | [diff] [blame] | 2959 | set->udlen = udlen; |
| 2960 | set->udata = udata; |
Patrick McHardy | 761da29 | 2015-03-26 12:39:36 +0000 | [diff] [blame] | 2961 | set->timeout = timeout; |
| 2962 | set->gc_int = gc_int; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2963 | |
Patrick McHardy | c50b960 | 2014-03-28 10:19:47 +0000 | [diff] [blame] | 2964 | err = ops->init(set, &desc, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2965 | if (err < 0) |
| 2966 | goto err2; |
| 2967 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2968 | err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2969 | if (err < 0) |
Liping Zhang | c17c3cd | 2016-10-29 22:03:05 +0800 | [diff] [blame] | 2970 | goto err3; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2971 | |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2972 | list_add_tail_rcu(&set->list, &table->sets); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 2973 | table->use++; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2974 | return 0; |
| 2975 | |
Liping Zhang | c17c3cd | 2016-10-29 22:03:05 +0800 | [diff] [blame] | 2976 | err3: |
| 2977 | ops->destroy(set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2978 | err2: |
| 2979 | kfree(set); |
| 2980 | err1: |
| 2981 | module_put(ops->owner); |
| 2982 | return err; |
| 2983 | } |
| 2984 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2985 | static void nft_set_destroy(struct nft_set *set) |
| 2986 | { |
| 2987 | set->ops->destroy(set); |
| 2988 | module_put(set->ops->owner); |
| 2989 | kfree(set); |
| 2990 | } |
| 2991 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2992 | static void nf_tables_set_destroy(const struct nft_ctx *ctx, struct nft_set *set) |
| 2993 | { |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 2994 | list_del_rcu(&set->list); |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 2995 | nf_tables_set_notify(ctx, set, NFT_MSG_DELSET, GFP_ATOMIC); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 2996 | nft_set_destroy(set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 2997 | } |
| 2998 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 2999 | static int nf_tables_delset(struct net *net, struct sock *nlsk, |
| 3000 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3001 | const struct nlattr * const nla[]) |
| 3002 | { |
Pablo Neira Ayuso | c9c8e48 | 2013-12-26 16:49:03 +0100 | [diff] [blame] | 3003 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3004 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3005 | struct nft_set *set; |
| 3006 | struct nft_ctx ctx; |
| 3007 | int err; |
| 3008 | |
Patrick McHardy | ec2c993 | 2014-02-05 15:03:35 +0000 | [diff] [blame] | 3009 | if (nfmsg->nfgen_family == NFPROTO_UNSPEC) |
| 3010 | return -EAFNOSUPPORT; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3011 | if (nla[NFTA_SET_TABLE] == NULL) |
| 3012 | return -EINVAL; |
| 3013 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3014 | err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla, genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3015 | if (err < 0) |
| 3016 | return err; |
| 3017 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3018 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME], genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3019 | if (IS_ERR(set)) |
| 3020 | return PTR_ERR(set); |
| 3021 | if (!list_empty(&set->bindings)) |
| 3022 | return -EBUSY; |
| 3023 | |
Arturo Borrero | ee01d54 | 2014-09-02 16:42:25 +0200 | [diff] [blame] | 3024 | return nft_delset(&ctx, set); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3025 | } |
| 3026 | |
| 3027 | static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx, |
| 3028 | const struct nft_set *set, |
| 3029 | const struct nft_set_iter *iter, |
| 3030 | const struct nft_set_elem *elem) |
| 3031 | { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3032 | 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] | 3033 | enum nft_registers dreg; |
| 3034 | |
| 3035 | dreg = nft_type_to_reg(set->dtype); |
Patrick McHardy | 1ec1021 | 2015-04-11 02:27:27 +0100 | [diff] [blame] | 3036 | return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext), |
| 3037 | set->dtype == NFT_DATA_VERDICT ? |
| 3038 | NFT_DATA_VERDICT : NFT_DATA_VALUE, |
| 3039 | set->dlen); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3040 | } |
| 3041 | |
| 3042 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
| 3043 | struct nft_set_binding *binding) |
| 3044 | { |
| 3045 | struct nft_set_binding *i; |
| 3046 | struct nft_set_iter iter; |
| 3047 | |
| 3048 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_ANONYMOUS) |
| 3049 | return -EBUSY; |
| 3050 | |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 3051 | if (binding->flags & NFT_SET_MAP) { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3052 | /* If the set is already bound to the same chain all |
| 3053 | * jumps are already validated for that chain. |
| 3054 | */ |
| 3055 | list_for_each_entry(i, &set->bindings, list) { |
Liping Zhang | a468440 | 2016-06-11 12:20:26 +0800 | [diff] [blame] | 3056 | if (i->flags & NFT_SET_MAP && |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 3057 | i->chain == binding->chain) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3058 | goto bind; |
| 3059 | } |
| 3060 | |
Pablo Neira Ayuso | 8588ac0 | 2016-06-11 12:20:27 +0800 | [diff] [blame] | 3061 | iter.genmask = nft_genmask_next(ctx->net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3062 | iter.skip = 0; |
| 3063 | iter.count = 0; |
| 3064 | iter.err = 0; |
| 3065 | iter.fn = nf_tables_bind_check_setelem; |
| 3066 | |
| 3067 | set->ops->walk(ctx, set, &iter); |
Liping Zhang | a02f424 | 2016-06-11 12:20:28 +0800 | [diff] [blame] | 3068 | if (iter.err < 0) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3069 | return iter.err; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3070 | } |
| 3071 | bind: |
| 3072 | binding->chain = ctx->chain; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3073 | list_add_tail_rcu(&binding->list, &set->bindings); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3074 | return 0; |
| 3075 | } |
| 3076 | |
| 3077 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, |
| 3078 | struct nft_set_binding *binding) |
| 3079 | { |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 3080 | list_del_rcu(&binding->list); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3081 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3082 | if (list_empty(&set->bindings) && set->flags & NFT_SET_ANONYMOUS && |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3083 | nft_is_active(ctx->net, set)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3084 | nf_tables_set_destroy(ctx, set); |
| 3085 | } |
| 3086 | |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 3087 | const struct nft_set_ext_type nft_set_ext_types[] = { |
| 3088 | [NFT_SET_EXT_KEY] = { |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3089 | .align = __alignof__(u32), |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 3090 | }, |
| 3091 | [NFT_SET_EXT_DATA] = { |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3092 | .align = __alignof__(u32), |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 3093 | }, |
Patrick McHardy | f25ad2e | 2015-04-11 10:46:39 +0100 | [diff] [blame] | 3094 | [NFT_SET_EXT_EXPR] = { |
| 3095 | .align = __alignof__(struct nft_expr), |
| 3096 | }, |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 3097 | [NFT_SET_EXT_FLAGS] = { |
| 3098 | .len = sizeof(u8), |
| 3099 | .align = __alignof__(u8), |
| 3100 | }, |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3101 | [NFT_SET_EXT_TIMEOUT] = { |
| 3102 | .len = sizeof(u64), |
| 3103 | .align = __alignof__(u64), |
| 3104 | }, |
| 3105 | [NFT_SET_EXT_EXPIRATION] = { |
| 3106 | .len = sizeof(unsigned long), |
| 3107 | .align = __alignof__(unsigned long), |
| 3108 | }, |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3109 | [NFT_SET_EXT_USERDATA] = { |
| 3110 | .len = sizeof(struct nft_userdata), |
| 3111 | .align = __alignof__(struct nft_userdata), |
| 3112 | }, |
Patrick McHardy | 3ac4c07 | 2015-03-25 13:07:49 +0000 | [diff] [blame] | 3113 | }; |
| 3114 | EXPORT_SYMBOL_GPL(nft_set_ext_types); |
| 3115 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3116 | /* |
| 3117 | * Set elements |
| 3118 | */ |
| 3119 | |
| 3120 | static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = { |
| 3121 | [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED }, |
| 3122 | [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED }, |
| 3123 | [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 }, |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3124 | [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 }, |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3125 | [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY, |
| 3126 | .len = NFT_USERDATA_MAXLEN }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3127 | }; |
| 3128 | |
| 3129 | static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = { |
| 3130 | [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING }, |
| 3131 | [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING }, |
| 3132 | [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3133 | [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3134 | }; |
| 3135 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 3136 | static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx, struct net *net, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3137 | const struct sk_buff *skb, |
| 3138 | const struct nlmsghdr *nlh, |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3139 | const struct nlattr * const nla[], |
| 3140 | u8 genmask) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3141 | { |
| 3142 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 3143 | struct nft_af_info *afi; |
| 3144 | struct nft_table *table; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3145 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 3146 | afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3147 | if (IS_ERR(afi)) |
| 3148 | return PTR_ERR(afi); |
| 3149 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3150 | table = nf_tables_table_lookup(afi, nla[NFTA_SET_ELEM_LIST_TABLE], |
| 3151 | genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3152 | if (IS_ERR(table)) |
| 3153 | return PTR_ERR(table); |
| 3154 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 3155 | nft_ctx_init(ctx, net, skb, nlh, afi, table, NULL, nla); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3156 | return 0; |
| 3157 | } |
| 3158 | |
| 3159 | static int nf_tables_fill_setelem(struct sk_buff *skb, |
| 3160 | const struct nft_set *set, |
| 3161 | const struct nft_set_elem *elem) |
| 3162 | { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3163 | 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] | 3164 | unsigned char *b = skb_tail_pointer(skb); |
| 3165 | struct nlattr *nest; |
| 3166 | |
| 3167 | nest = nla_nest_start(skb, NFTA_LIST_ELEM); |
| 3168 | if (nest == NULL) |
| 3169 | goto nla_put_failure; |
| 3170 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3171 | if (nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext), |
| 3172 | NFT_DATA_VALUE, set->klen) < 0) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3173 | goto nla_put_failure; |
| 3174 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3175 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) && |
| 3176 | 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] | 3177 | set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE, |
| 3178 | set->dlen) < 0) |
| 3179 | goto nla_put_failure; |
| 3180 | |
Patrick McHardy | f25ad2e | 2015-04-11 10:46:39 +0100 | [diff] [blame] | 3181 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR) && |
| 3182 | nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, nft_set_ext_expr(ext)) < 0) |
| 3183 | goto nla_put_failure; |
| 3184 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3185 | if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) && |
| 3186 | nla_put_be32(skb, NFTA_SET_ELEM_FLAGS, |
| 3187 | htonl(*nft_set_ext_flags(ext)))) |
| 3188 | goto nla_put_failure; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3189 | |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3190 | if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) && |
| 3191 | nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT, |
Anders K. Pedersen | d3e2a11 | 2016-11-20 16:38:47 +0000 | [diff] [blame] | 3192 | cpu_to_be64(jiffies_to_msecs( |
| 3193 | *nft_set_ext_timeout(ext))), |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 3194 | NFTA_SET_ELEM_PAD)) |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3195 | goto nla_put_failure; |
| 3196 | |
| 3197 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) { |
| 3198 | unsigned long expires, now = jiffies; |
| 3199 | |
| 3200 | expires = *nft_set_ext_expiration(ext); |
| 3201 | if (time_before(now, expires)) |
| 3202 | expires -= now; |
| 3203 | else |
| 3204 | expires = 0; |
| 3205 | |
| 3206 | if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION, |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 3207 | cpu_to_be64(jiffies_to_msecs(expires)), |
| 3208 | NFTA_SET_ELEM_PAD)) |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3209 | goto nla_put_failure; |
| 3210 | } |
| 3211 | |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3212 | if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) { |
| 3213 | struct nft_userdata *udata; |
| 3214 | |
| 3215 | udata = nft_set_ext_userdata(ext); |
| 3216 | if (nla_put(skb, NFTA_SET_ELEM_USERDATA, |
| 3217 | udata->len + 1, udata->data)) |
| 3218 | goto nla_put_failure; |
| 3219 | } |
| 3220 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3221 | nla_nest_end(skb, nest); |
| 3222 | return 0; |
| 3223 | |
| 3224 | nla_put_failure: |
| 3225 | nlmsg_trim(skb, b); |
| 3226 | return -EMSGSIZE; |
| 3227 | } |
| 3228 | |
| 3229 | struct nft_set_dump_args { |
| 3230 | const struct netlink_callback *cb; |
| 3231 | struct nft_set_iter iter; |
| 3232 | struct sk_buff *skb; |
| 3233 | }; |
| 3234 | |
| 3235 | static int nf_tables_dump_setelem(const struct nft_ctx *ctx, |
| 3236 | const struct nft_set *set, |
| 3237 | const struct nft_set_iter *iter, |
| 3238 | const struct nft_set_elem *elem) |
| 3239 | { |
| 3240 | struct nft_set_dump_args *args; |
| 3241 | |
| 3242 | args = container_of(iter, struct nft_set_dump_args, iter); |
| 3243 | return nf_tables_fill_setelem(args->skb, set, elem); |
| 3244 | } |
| 3245 | |
| 3246 | static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb) |
| 3247 | { |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 3248 | struct net *net = sock_net(skb->sk); |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3249 | u8 genmask = nft_genmask_cur(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3250 | const struct nft_set *set; |
| 3251 | struct nft_set_dump_args args; |
| 3252 | struct nft_ctx ctx; |
| 3253 | struct nlattr *nla[NFTA_SET_ELEM_LIST_MAX + 1]; |
| 3254 | struct nfgenmsg *nfmsg; |
| 3255 | struct nlmsghdr *nlh; |
| 3256 | struct nlattr *nest; |
| 3257 | u32 portid, seq; |
| 3258 | int event, err; |
| 3259 | |
Michal Nazarewicz | 720e0df | 2014-01-01 06:27:19 +0100 | [diff] [blame] | 3260 | err = nlmsg_parse(cb->nlh, sizeof(struct nfgenmsg), nla, |
| 3261 | NFTA_SET_ELEM_LIST_MAX, nft_set_elem_list_policy); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3262 | if (err < 0) |
| 3263 | return err; |
| 3264 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 3265 | err = nft_ctx_init_from_elemattr(&ctx, net, cb->skb, cb->nlh, |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3266 | (void *)nla, genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3267 | if (err < 0) |
| 3268 | return err; |
| 3269 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3270 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET], |
| 3271 | genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3272 | if (IS_ERR(set)) |
| 3273 | return PTR_ERR(set); |
| 3274 | |
| 3275 | event = NFT_MSG_NEWSETELEM; |
| 3276 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 3277 | portid = NETLINK_CB(cb->skb).portid; |
| 3278 | seq = cb->nlh->nlmsg_seq; |
| 3279 | |
| 3280 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
| 3281 | NLM_F_MULTI); |
| 3282 | if (nlh == NULL) |
| 3283 | goto nla_put_failure; |
| 3284 | |
| 3285 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | 6403d96 | 2014-06-11 19:05:28 +0200 | [diff] [blame] | 3286 | nfmsg->nfgen_family = ctx.afi->family; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3287 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3288 | nfmsg->res_id = htons(ctx.net->nft.base_seq & 0xffff); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3289 | |
| 3290 | if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, ctx.table->name)) |
| 3291 | goto nla_put_failure; |
| 3292 | if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name)) |
| 3293 | goto nla_put_failure; |
| 3294 | |
| 3295 | nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS); |
| 3296 | if (nest == NULL) |
| 3297 | goto nla_put_failure; |
| 3298 | |
Pablo Neira Ayuso | 8588ac0 | 2016-06-11 12:20:27 +0800 | [diff] [blame] | 3299 | args.cb = cb; |
| 3300 | args.skb = skb; |
| 3301 | args.iter.genmask = nft_genmask_cur(ctx.net); |
| 3302 | args.iter.skip = cb->args[0]; |
| 3303 | args.iter.count = 0; |
| 3304 | args.iter.err = 0; |
| 3305 | args.iter.fn = nf_tables_dump_setelem; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3306 | set->ops->walk(&ctx, set, &args.iter); |
| 3307 | |
| 3308 | nla_nest_end(skb, nest); |
| 3309 | nlmsg_end(skb, nlh); |
| 3310 | |
| 3311 | if (args.iter.err && args.iter.err != -EMSGSIZE) |
| 3312 | return args.iter.err; |
| 3313 | if (args.iter.count == cb->args[0]) |
| 3314 | return 0; |
| 3315 | |
| 3316 | cb->args[0] = args.iter.count; |
| 3317 | return skb->len; |
| 3318 | |
| 3319 | nla_put_failure: |
| 3320 | return -ENOSPC; |
| 3321 | } |
| 3322 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 3323 | static int nf_tables_getsetelem(struct net *net, struct sock *nlsk, |
| 3324 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3325 | const struct nlattr * const nla[]) |
| 3326 | { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3327 | u8 genmask = nft_genmask_cur(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3328 | const struct nft_set *set; |
| 3329 | struct nft_ctx ctx; |
| 3330 | int err; |
| 3331 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3332 | err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3333 | if (err < 0) |
| 3334 | return err; |
| 3335 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3336 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET], |
| 3337 | genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3338 | if (IS_ERR(set)) |
| 3339 | return PTR_ERR(set); |
| 3340 | |
| 3341 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 3342 | struct netlink_dump_control c = { |
| 3343 | .dump = nf_tables_dump_set, |
| 3344 | }; |
| 3345 | return netlink_dump_start(nlsk, skb, nlh, &c); |
| 3346 | } |
| 3347 | return -EOPNOTSUPP; |
| 3348 | } |
| 3349 | |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3350 | static int nf_tables_fill_setelem_info(struct sk_buff *skb, |
| 3351 | const struct nft_ctx *ctx, u32 seq, |
| 3352 | u32 portid, int event, u16 flags, |
| 3353 | const struct nft_set *set, |
| 3354 | const struct nft_set_elem *elem) |
| 3355 | { |
| 3356 | struct nfgenmsg *nfmsg; |
| 3357 | struct nlmsghdr *nlh; |
| 3358 | struct nlattr *nest; |
| 3359 | int err; |
| 3360 | |
| 3361 | event |= NFNL_SUBSYS_NFTABLES << 8; |
| 3362 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
| 3363 | flags); |
| 3364 | if (nlh == NULL) |
| 3365 | goto nla_put_failure; |
| 3366 | |
| 3367 | nfmsg = nlmsg_data(nlh); |
| 3368 | nfmsg->nfgen_family = ctx->afi->family; |
| 3369 | nfmsg->version = NFNETLINK_V0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3370 | nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff); |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3371 | |
| 3372 | if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name)) |
| 3373 | goto nla_put_failure; |
| 3374 | if (nla_put_string(skb, NFTA_SET_NAME, set->name)) |
| 3375 | goto nla_put_failure; |
| 3376 | |
| 3377 | nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS); |
| 3378 | if (nest == NULL) |
| 3379 | goto nla_put_failure; |
| 3380 | |
| 3381 | err = nf_tables_fill_setelem(skb, set, elem); |
| 3382 | if (err < 0) |
| 3383 | goto nla_put_failure; |
| 3384 | |
| 3385 | nla_nest_end(skb, nest); |
| 3386 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3387 | nlmsg_end(skb, nlh); |
| 3388 | return 0; |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3389 | |
| 3390 | nla_put_failure: |
| 3391 | nlmsg_trim(skb, nlh); |
| 3392 | return -1; |
| 3393 | } |
| 3394 | |
| 3395 | static int nf_tables_setelem_notify(const struct nft_ctx *ctx, |
| 3396 | const struct nft_set *set, |
| 3397 | const struct nft_set_elem *elem, |
| 3398 | int event, u16 flags) |
| 3399 | { |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 3400 | struct net *net = ctx->net; |
| 3401 | u32 portid = ctx->portid; |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3402 | struct sk_buff *skb; |
| 3403 | int err; |
| 3404 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 3405 | if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3406 | return 0; |
| 3407 | |
| 3408 | err = -ENOBUFS; |
| 3409 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 3410 | if (skb == NULL) |
| 3411 | goto err; |
| 3412 | |
| 3413 | err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags, |
| 3414 | set, elem); |
| 3415 | if (err < 0) { |
| 3416 | kfree_skb(skb); |
| 3417 | goto err; |
| 3418 | } |
| 3419 | |
Pablo Neira Ayuso | 128ad33 | 2014-05-09 17:14:24 +0200 | [diff] [blame] | 3420 | err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, ctx->report, |
Arturo Borrero | d60ce62 | 2014-04-01 14:06:07 +0200 | [diff] [blame] | 3421 | GFP_KERNEL); |
| 3422 | err: |
| 3423 | if (err < 0) |
| 3424 | nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, err); |
| 3425 | return err; |
| 3426 | } |
| 3427 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3428 | static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx, |
| 3429 | int msg_type, |
| 3430 | struct nft_set *set) |
| 3431 | { |
| 3432 | struct nft_trans *trans; |
| 3433 | |
| 3434 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem)); |
| 3435 | if (trans == NULL) |
| 3436 | return NULL; |
| 3437 | |
| 3438 | nft_trans_elem_set(trans) = set; |
| 3439 | return trans; |
| 3440 | } |
| 3441 | |
Patrick McHardy | 22fe54d | 2015-04-05 14:41:08 +0200 | [diff] [blame] | 3442 | void *nft_set_elem_init(const struct nft_set *set, |
| 3443 | const struct nft_set_ext_tmpl *tmpl, |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 3444 | const u32 *key, const u32 *data, |
Patrick McHardy | 22fe54d | 2015-04-05 14:41:08 +0200 | [diff] [blame] | 3445 | u64 timeout, gfp_t gfp) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3446 | { |
| 3447 | struct nft_set_ext *ext; |
| 3448 | void *elem; |
| 3449 | |
| 3450 | elem = kzalloc(set->ops->elemsize + tmpl->len, gfp); |
| 3451 | if (elem == NULL) |
| 3452 | return NULL; |
| 3453 | |
| 3454 | ext = nft_set_elem_ext(set, elem); |
| 3455 | nft_set_ext_init(ext, tmpl); |
| 3456 | |
| 3457 | memcpy(nft_set_ext_key(ext), key, set->klen); |
| 3458 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) |
| 3459 | memcpy(nft_set_ext_data(ext), data, set->dlen); |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3460 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) |
| 3461 | *nft_set_ext_expiration(ext) = |
Anders K. Pedersen | d3e2a11 | 2016-11-20 16:38:47 +0000 | [diff] [blame] | 3462 | jiffies + timeout; |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3463 | if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT)) |
| 3464 | *nft_set_ext_timeout(ext) = timeout; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3465 | |
| 3466 | return elem; |
| 3467 | } |
| 3468 | |
Liping Zhang | 61f9e29 | 2016-10-22 18:51:25 +0800 | [diff] [blame] | 3469 | void nft_set_elem_destroy(const struct nft_set *set, void *elem, |
| 3470 | bool destroy_expr) |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 3471 | { |
| 3472 | struct nft_set_ext *ext = nft_set_elem_ext(set, elem); |
| 3473 | |
| 3474 | nft_data_uninit(nft_set_ext_key(ext), NFT_DATA_VALUE); |
| 3475 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) |
| 3476 | nft_data_uninit(nft_set_ext_data(ext), set->dtype); |
Liping Zhang | 61f9e29 | 2016-10-22 18:51:25 +0800 | [diff] [blame] | 3477 | if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) |
Patrick McHardy | f25ad2e | 2015-04-11 10:46:39 +0100 | [diff] [blame] | 3478 | nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext)); |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 3479 | |
| 3480 | kfree(elem); |
| 3481 | } |
| 3482 | EXPORT_SYMBOL_GPL(nft_set_elem_destroy); |
| 3483 | |
Pablo Neira Ayuso | 0e9091d | 2016-04-12 23:50:34 +0200 | [diff] [blame] | 3484 | static int nft_setelem_parse_flags(const struct nft_set *set, |
| 3485 | const struct nlattr *attr, u32 *flags) |
| 3486 | { |
| 3487 | if (attr == NULL) |
| 3488 | return 0; |
| 3489 | |
| 3490 | *flags = ntohl(nla_get_be32(attr)); |
| 3491 | if (*flags & ~NFT_SET_ELEM_INTERVAL_END) |
| 3492 | return -EINVAL; |
| 3493 | if (!(set->flags & NFT_SET_INTERVAL) && |
| 3494 | *flags & NFT_SET_ELEM_INTERVAL_END) |
| 3495 | return -EINVAL; |
| 3496 | |
| 3497 | return 0; |
| 3498 | } |
| 3499 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3500 | static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, |
Pablo Neira Ayuso | c016c7e | 2016-08-24 12:41:54 +0200 | [diff] [blame] | 3501 | const struct nlattr *attr, u32 nlmsg_flags) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3502 | { |
| 3503 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; |
| 3504 | struct nft_data_desc d1, d2; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3505 | struct nft_set_ext_tmpl tmpl; |
Pablo Neira Ayuso | c016c7e | 2016-08-24 12:41:54 +0200 | [diff] [blame] | 3506 | struct nft_set_ext *ext, *ext2; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3507 | struct nft_set_elem elem; |
| 3508 | struct nft_set_binding *binding; |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3509 | struct nft_userdata *udata; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3510 | struct nft_data data; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3511 | enum nft_registers dreg; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3512 | struct nft_trans *trans; |
Pablo Neira Ayuso | 0e9091d | 2016-04-12 23:50:34 +0200 | [diff] [blame] | 3513 | u32 flags = 0; |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3514 | u64 timeout; |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3515 | u8 ulen; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3516 | int err; |
| 3517 | |
| 3518 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, |
| 3519 | nft_set_elem_policy); |
| 3520 | if (err < 0) |
| 3521 | return err; |
| 3522 | |
| 3523 | if (nla[NFTA_SET_ELEM_KEY] == NULL) |
| 3524 | return -EINVAL; |
| 3525 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3526 | nft_set_ext_prepare(&tmpl); |
| 3527 | |
Pablo Neira Ayuso | 0e9091d | 2016-04-12 23:50:34 +0200 | [diff] [blame] | 3528 | err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags); |
| 3529 | if (err < 0) |
| 3530 | return err; |
| 3531 | if (flags != 0) |
| 3532 | nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3533 | |
| 3534 | if (set->flags & NFT_SET_MAP) { |
| 3535 | if (nla[NFTA_SET_ELEM_DATA] == NULL && |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3536 | !(flags & NFT_SET_ELEM_INTERVAL_END)) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3537 | return -EINVAL; |
Pablo Neira Ayuso | bd7fc64 | 2014-02-07 12:53:07 +0100 | [diff] [blame] | 3538 | if (nla[NFTA_SET_ELEM_DATA] != NULL && |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3539 | flags & NFT_SET_ELEM_INTERVAL_END) |
Pablo Neira Ayuso | bd7fc64 | 2014-02-07 12:53:07 +0100 | [diff] [blame] | 3540 | return -EINVAL; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3541 | } else { |
| 3542 | if (nla[NFTA_SET_ELEM_DATA] != NULL) |
| 3543 | return -EINVAL; |
| 3544 | } |
| 3545 | |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3546 | timeout = 0; |
| 3547 | if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) { |
| 3548 | if (!(set->flags & NFT_SET_TIMEOUT)) |
| 3549 | return -EINVAL; |
Anders K. Pedersen | d3e2a11 | 2016-11-20 16:38:47 +0000 | [diff] [blame] | 3550 | timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64( |
| 3551 | nla[NFTA_SET_ELEM_TIMEOUT]))); |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3552 | } else if (set->flags & NFT_SET_TIMEOUT) { |
| 3553 | timeout = set->timeout; |
| 3554 | } |
| 3555 | |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3556 | err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &d1, |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 3557 | nla[NFTA_SET_ELEM_KEY]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3558 | if (err < 0) |
| 3559 | goto err1; |
| 3560 | err = -EINVAL; |
| 3561 | if (d1.type != NFT_DATA_VALUE || d1.len != set->klen) |
| 3562 | goto err2; |
| 3563 | |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3564 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, d1.len); |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3565 | if (timeout > 0) { |
| 3566 | nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION); |
| 3567 | if (timeout != set->timeout) |
| 3568 | nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT); |
| 3569 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3570 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3571 | if (nla[NFTA_SET_ELEM_DATA] != NULL) { |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 3572 | err = nft_data_init(ctx, &data, sizeof(data), &d2, |
| 3573 | nla[NFTA_SET_ELEM_DATA]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3574 | if (err < 0) |
| 3575 | goto err2; |
| 3576 | |
| 3577 | err = -EINVAL; |
| 3578 | if (set->dtype != NFT_DATA_VERDICT && d2.len != set->dlen) |
| 3579 | goto err3; |
| 3580 | |
| 3581 | dreg = nft_type_to_reg(set->dtype); |
| 3582 | list_for_each_entry(binding, &set->bindings, list) { |
| 3583 | struct nft_ctx bind_ctx = { |
Liping Zhang | 58c78e1 | 2016-11-06 14:40:01 +0800 | [diff] [blame] | 3584 | .net = ctx->net, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3585 | .afi = ctx->afi, |
| 3586 | .table = ctx->table, |
Pablo Neira Ayuso | 7c95f6d | 2014-04-04 01:22:45 +0200 | [diff] [blame] | 3587 | .chain = (struct nft_chain *)binding->chain, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3588 | }; |
| 3589 | |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 3590 | if (!(binding->flags & NFT_SET_MAP)) |
| 3591 | continue; |
| 3592 | |
Patrick McHardy | 1ec1021 | 2015-04-11 02:27:27 +0100 | [diff] [blame] | 3593 | err = nft_validate_register_store(&bind_ctx, dreg, |
| 3594 | &data, |
| 3595 | d2.type, d2.len); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3596 | if (err < 0) |
| 3597 | goto err3; |
| 3598 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3599 | |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3600 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, d2.len); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3601 | } |
| 3602 | |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3603 | /* The full maximum length of userdata can exceed the maximum |
| 3604 | * offset value (U8_MAX) for following extensions, therefor it |
| 3605 | * must be the last extension added. |
| 3606 | */ |
| 3607 | ulen = 0; |
| 3608 | if (nla[NFTA_SET_ELEM_USERDATA] != NULL) { |
| 3609 | ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]); |
| 3610 | if (ulen > 0) |
| 3611 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA, |
| 3612 | ulen); |
| 3613 | } |
| 3614 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3615 | err = -ENOMEM; |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3616 | elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, data.data, |
Patrick McHardy | c3e1b00 | 2015-03-26 12:39:37 +0000 | [diff] [blame] | 3617 | timeout, GFP_KERNEL); |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3618 | if (elem.priv == NULL) |
| 3619 | goto err3; |
| 3620 | |
| 3621 | ext = nft_set_elem_ext(set, elem.priv); |
| 3622 | if (flags) |
| 3623 | *nft_set_ext_flags(ext) = flags; |
Patrick McHardy | 68e942e | 2015-04-05 14:43:38 +0200 | [diff] [blame] | 3624 | if (ulen > 0) { |
| 3625 | udata = nft_set_ext_userdata(ext); |
| 3626 | udata->len = ulen - 1; |
| 3627 | nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen); |
| 3628 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3629 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3630 | trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set); |
| 3631 | if (trans == NULL) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3632 | goto err4; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3633 | |
Patrick McHardy | 6908665 | 2015-03-26 12:39:39 +0000 | [diff] [blame] | 3634 | ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK; |
Pablo Neira Ayuso | c016c7e | 2016-08-24 12:41:54 +0200 | [diff] [blame] | 3635 | err = set->ops->insert(ctx->net, set, &elem, &ext2); |
| 3636 | if (err) { |
| 3637 | if (err == -EEXIST) { |
| 3638 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) && |
| 3639 | nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) && |
| 3640 | memcmp(nft_set_ext_data(ext), |
| 3641 | nft_set_ext_data(ext2), set->dlen) != 0) |
| 3642 | err = -EBUSY; |
| 3643 | else if (!(nlmsg_flags & NLM_F_EXCL)) |
| 3644 | err = 0; |
| 3645 | } |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3646 | goto err5; |
Pablo Neira Ayuso | c016c7e | 2016-08-24 12:41:54 +0200 | [diff] [blame] | 3647 | } |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3648 | |
Pablo Neira Ayuso | fefdd79 | 2017-01-24 00:51:32 +0100 | [diff] [blame] | 3649 | if (set->size && |
| 3650 | !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) { |
| 3651 | err = -ENFILE; |
| 3652 | goto err6; |
| 3653 | } |
| 3654 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3655 | nft_trans_elem(trans) = elem; |
Pablo Neira Ayuso | 46bbafc | 2014-05-22 12:36:03 +0200 | [diff] [blame] | 3656 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3657 | return 0; |
| 3658 | |
Pablo Neira Ayuso | fefdd79 | 2017-01-24 00:51:32 +0100 | [diff] [blame] | 3659 | err6: |
| 3660 | set->ops->remove(set, &elem); |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3661 | err5: |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3662 | kfree(trans); |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3663 | err4: |
| 3664 | kfree(elem.priv); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3665 | err3: |
| 3666 | if (nla[NFTA_SET_ELEM_DATA] != NULL) |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 3667 | nft_data_uninit(&data, d2.type); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3668 | err2: |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3669 | nft_data_uninit(&elem.key.val, d1.type); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3670 | err1: |
| 3671 | return err; |
| 3672 | } |
| 3673 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 3674 | static int nf_tables_newsetelem(struct net *net, struct sock *nlsk, |
| 3675 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3676 | const struct nlattr * const nla[]) |
| 3677 | { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3678 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3679 | const struct nlattr *attr; |
| 3680 | struct nft_set *set; |
| 3681 | struct nft_ctx ctx; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3682 | int rem, err = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3683 | |
Pablo Neira Ayuso | 7d5570c | 2014-07-25 13:15:36 +0200 | [diff] [blame] | 3684 | if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) |
| 3685 | return -EINVAL; |
| 3686 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3687 | err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3688 | if (err < 0) |
| 3689 | return err; |
| 3690 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3691 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET], |
| 3692 | genmask); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3693 | if (IS_ERR(set)) { |
| 3694 | if (nla[NFTA_SET_ELEM_LIST_SET_ID]) { |
| 3695 | set = nf_tables_set_lookup_byid(net, |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3696 | nla[NFTA_SET_ELEM_LIST_SET_ID], |
| 3697 | genmask); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3698 | } |
| 3699 | if (IS_ERR(set)) |
| 3700 | return PTR_ERR(set); |
| 3701 | } |
| 3702 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3703 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) |
| 3704 | return -EBUSY; |
| 3705 | |
| 3706 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { |
Pablo Neira Ayuso | c016c7e | 2016-08-24 12:41:54 +0200 | [diff] [blame] | 3707 | err = nft_add_set_elem(&ctx, set, attr, nlh->nlmsg_flags); |
Pablo Neira Ayuso | fefdd79 | 2017-01-24 00:51:32 +0100 | [diff] [blame] | 3708 | if (err < 0) |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3709 | break; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3710 | } |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3711 | return err; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3712 | } |
| 3713 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3714 | 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] | 3715 | const struct nlattr *attr) |
| 3716 | { |
| 3717 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3718 | struct nft_set_ext_tmpl tmpl; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3719 | struct nft_data_desc desc; |
| 3720 | struct nft_set_elem elem; |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3721 | struct nft_set_ext *ext; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3722 | struct nft_trans *trans; |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3723 | u32 flags = 0; |
| 3724 | void *priv; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3725 | int err; |
| 3726 | |
| 3727 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, |
| 3728 | nft_set_elem_policy); |
| 3729 | if (err < 0) |
| 3730 | goto err1; |
| 3731 | |
| 3732 | err = -EINVAL; |
| 3733 | if (nla[NFTA_SET_ELEM_KEY] == NULL) |
| 3734 | goto err1; |
| 3735 | |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3736 | nft_set_ext_prepare(&tmpl); |
| 3737 | |
| 3738 | err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags); |
| 3739 | if (err < 0) |
| 3740 | return err; |
| 3741 | if (flags != 0) |
| 3742 | nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS); |
| 3743 | |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3744 | err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &desc, |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 3745 | nla[NFTA_SET_ELEM_KEY]); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3746 | if (err < 0) |
| 3747 | goto err1; |
| 3748 | |
| 3749 | err = -EINVAL; |
| 3750 | if (desc.type != NFT_DATA_VALUE || desc.len != set->klen) |
| 3751 | goto err2; |
| 3752 | |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3753 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, desc.len); |
| 3754 | |
| 3755 | err = -ENOMEM; |
| 3756 | elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, NULL, 0, |
| 3757 | GFP_KERNEL); |
| 3758 | if (elem.priv == NULL) |
| 3759 | goto err2; |
| 3760 | |
| 3761 | ext = nft_set_elem_ext(set, elem.priv); |
| 3762 | if (flags) |
| 3763 | *nft_set_ext_flags(ext) = flags; |
| 3764 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3765 | trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set); |
Julia Lawall | 609ccf0 | 2014-08-07 14:49:08 +0200 | [diff] [blame] | 3766 | if (trans == NULL) { |
| 3767 | err = -ENOMEM; |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3768 | goto err3; |
| 3769 | } |
| 3770 | |
Pablo Neira Ayuso | 42a5576 | 2016-07-08 14:41:49 +0200 | [diff] [blame] | 3771 | priv = set->ops->deactivate(ctx->net, set, &elem); |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3772 | if (priv == NULL) { |
| 3773 | err = -ENOENT; |
| 3774 | goto err4; |
| 3775 | } |
| 3776 | kfree(elem.priv); |
| 3777 | elem.priv = priv; |
| 3778 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3779 | nft_trans_elem(trans) = elem; |
Pablo Neira Ayuso | 46bbafc | 2014-05-22 12:36:03 +0200 | [diff] [blame] | 3780 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
Thomas Graf | 0dc1362 | 2014-08-01 17:25:38 +0200 | [diff] [blame] | 3781 | return 0; |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3782 | |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3783 | err4: |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 3784 | kfree(trans); |
Pablo Neira Ayuso | 3971ca1 | 2016-04-12 23:50:35 +0200 | [diff] [blame] | 3785 | err3: |
| 3786 | kfree(elem.priv); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3787 | err2: |
Patrick McHardy | 7d74026 | 2015-04-11 02:27:39 +0100 | [diff] [blame] | 3788 | nft_data_uninit(&elem.key.val, desc.type); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3789 | err1: |
| 3790 | return err; |
| 3791 | } |
| 3792 | |
Pablo Neira Ayuso | 633c9a8 | 2015-12-09 12:08:26 +0100 | [diff] [blame] | 3793 | static int nf_tables_delsetelem(struct net *net, struct sock *nlsk, |
| 3794 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3795 | const struct nlattr * const nla[]) |
| 3796 | { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3797 | u8 genmask = nft_genmask_next(net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3798 | const struct nlattr *attr; |
| 3799 | struct nft_set *set; |
| 3800 | struct nft_ctx ctx; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3801 | int rem, err = 0; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3802 | |
Pablo Neira Ayuso | 7d5570c | 2014-07-25 13:15:36 +0200 | [diff] [blame] | 3803 | if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) |
| 3804 | return -EINVAL; |
| 3805 | |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 3806 | err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3807 | if (err < 0) |
| 3808 | return err; |
| 3809 | |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 3810 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET], |
| 3811 | genmask); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3812 | if (IS_ERR(set)) |
| 3813 | return PTR_ERR(set); |
| 3814 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) |
| 3815 | return -EBUSY; |
| 3816 | |
| 3817 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { |
| 3818 | err = nft_del_setelem(&ctx, set, attr); |
| 3819 | if (err < 0) |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3820 | break; |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 3821 | |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 3822 | set->ndeact++; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3823 | } |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 3824 | return err; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3825 | } |
| 3826 | |
Patrick McHardy | cfed7e1 | 2015-03-26 12:39:38 +0000 | [diff] [blame] | 3827 | void nft_set_gc_batch_release(struct rcu_head *rcu) |
| 3828 | { |
| 3829 | struct nft_set_gc_batch *gcb; |
| 3830 | unsigned int i; |
| 3831 | |
| 3832 | gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu); |
| 3833 | for (i = 0; i < gcb->head.cnt; i++) |
Liping Zhang | 61f9e29 | 2016-10-22 18:51:25 +0800 | [diff] [blame] | 3834 | nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true); |
Patrick McHardy | cfed7e1 | 2015-03-26 12:39:38 +0000 | [diff] [blame] | 3835 | kfree(gcb); |
| 3836 | } |
| 3837 | EXPORT_SYMBOL_GPL(nft_set_gc_batch_release); |
| 3838 | |
| 3839 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, |
| 3840 | gfp_t gfp) |
| 3841 | { |
| 3842 | struct nft_set_gc_batch *gcb; |
| 3843 | |
| 3844 | gcb = kzalloc(sizeof(*gcb), gfp); |
| 3845 | if (gcb == NULL) |
| 3846 | return gcb; |
| 3847 | gcb->head.set = set; |
| 3848 | return gcb; |
| 3849 | } |
| 3850 | EXPORT_SYMBOL_GPL(nft_set_gc_batch_alloc); |
| 3851 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3852 | static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net, |
| 3853 | u32 portid, u32 seq) |
| 3854 | { |
| 3855 | struct nlmsghdr *nlh; |
| 3856 | struct nfgenmsg *nfmsg; |
| 3857 | int event = (NFNL_SUBSYS_NFTABLES << 8) | NFT_MSG_NEWGEN; |
| 3858 | |
| 3859 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), 0); |
| 3860 | if (nlh == NULL) |
| 3861 | goto nla_put_failure; |
| 3862 | |
| 3863 | nfmsg = nlmsg_data(nlh); |
| 3864 | nfmsg->nfgen_family = AF_UNSPEC; |
| 3865 | nfmsg->version = NFNETLINK_V0; |
| 3866 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
| 3867 | |
| 3868 | if (nla_put_be32(skb, NFTA_GEN_ID, htonl(net->nft.base_seq))) |
| 3869 | goto nla_put_failure; |
| 3870 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3871 | nlmsg_end(skb, nlh); |
| 3872 | return 0; |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3873 | |
| 3874 | nla_put_failure: |
| 3875 | nlmsg_trim(skb, nlh); |
| 3876 | return -EMSGSIZE; |
| 3877 | } |
| 3878 | |
| 3879 | static int nf_tables_gen_notify(struct net *net, struct sk_buff *skb, int event) |
| 3880 | { |
| 3881 | struct nlmsghdr *nlh = nlmsg_hdr(skb); |
| 3882 | struct sk_buff *skb2; |
| 3883 | int err; |
| 3884 | |
| 3885 | if (nlmsg_report(nlh) && |
| 3886 | !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) |
| 3887 | return 0; |
| 3888 | |
| 3889 | err = -ENOBUFS; |
| 3890 | skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
| 3891 | if (skb2 == NULL) |
| 3892 | goto err; |
| 3893 | |
| 3894 | err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid, |
| 3895 | nlh->nlmsg_seq); |
| 3896 | if (err < 0) { |
| 3897 | kfree_skb(skb2); |
| 3898 | goto err; |
| 3899 | } |
| 3900 | |
| 3901 | err = nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, |
| 3902 | NFNLGRP_NFTABLES, nlmsg_report(nlh), GFP_KERNEL); |
| 3903 | err: |
| 3904 | if (err < 0) { |
| 3905 | nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES, |
| 3906 | err); |
| 3907 | } |
| 3908 | return err; |
| 3909 | } |
| 3910 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 3911 | static int nf_tables_getgen(struct net *net, struct sock *nlsk, |
| 3912 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3913 | const struct nlattr * const nla[]) |
| 3914 | { |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 3915 | struct sk_buff *skb2; |
| 3916 | int err; |
| 3917 | |
| 3918 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 3919 | if (skb2 == NULL) |
| 3920 | return -ENOMEM; |
| 3921 | |
| 3922 | err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid, |
| 3923 | nlh->nlmsg_seq); |
| 3924 | if (err < 0) |
| 3925 | goto err; |
| 3926 | |
| 3927 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); |
| 3928 | err: |
| 3929 | kfree_skb(skb2); |
| 3930 | return err; |
| 3931 | } |
| 3932 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3933 | static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = { |
| 3934 | [NFT_MSG_NEWTABLE] = { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3935 | .call_batch = nf_tables_newtable, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3936 | .attr_count = NFTA_TABLE_MAX, |
| 3937 | .policy = nft_table_policy, |
| 3938 | }, |
| 3939 | [NFT_MSG_GETTABLE] = { |
| 3940 | .call = nf_tables_gettable, |
| 3941 | .attr_count = NFTA_TABLE_MAX, |
| 3942 | .policy = nft_table_policy, |
| 3943 | }, |
| 3944 | [NFT_MSG_DELTABLE] = { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 3945 | .call_batch = nf_tables_deltable, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3946 | .attr_count = NFTA_TABLE_MAX, |
| 3947 | .policy = nft_table_policy, |
| 3948 | }, |
| 3949 | [NFT_MSG_NEWCHAIN] = { |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3950 | .call_batch = nf_tables_newchain, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3951 | .attr_count = NFTA_CHAIN_MAX, |
| 3952 | .policy = nft_chain_policy, |
| 3953 | }, |
| 3954 | [NFT_MSG_GETCHAIN] = { |
| 3955 | .call = nf_tables_getchain, |
| 3956 | .attr_count = NFTA_CHAIN_MAX, |
| 3957 | .policy = nft_chain_policy, |
| 3958 | }, |
| 3959 | [NFT_MSG_DELCHAIN] = { |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 3960 | .call_batch = nf_tables_delchain, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3961 | .attr_count = NFTA_CHAIN_MAX, |
| 3962 | .policy = nft_chain_policy, |
| 3963 | }, |
| 3964 | [NFT_MSG_NEWRULE] = { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 3965 | .call_batch = nf_tables_newrule, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3966 | .attr_count = NFTA_RULE_MAX, |
| 3967 | .policy = nft_rule_policy, |
| 3968 | }, |
| 3969 | [NFT_MSG_GETRULE] = { |
| 3970 | .call = nf_tables_getrule, |
| 3971 | .attr_count = NFTA_RULE_MAX, |
| 3972 | .policy = nft_rule_policy, |
| 3973 | }, |
| 3974 | [NFT_MSG_DELRULE] = { |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 3975 | .call_batch = nf_tables_delrule, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 3976 | .attr_count = NFTA_RULE_MAX, |
| 3977 | .policy = nft_rule_policy, |
| 3978 | }, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3979 | [NFT_MSG_NEWSET] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3980 | .call_batch = nf_tables_newset, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3981 | .attr_count = NFTA_SET_MAX, |
| 3982 | .policy = nft_set_policy, |
| 3983 | }, |
| 3984 | [NFT_MSG_GETSET] = { |
| 3985 | .call = nf_tables_getset, |
| 3986 | .attr_count = NFTA_SET_MAX, |
| 3987 | .policy = nft_set_policy, |
| 3988 | }, |
| 3989 | [NFT_MSG_DELSET] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3990 | .call_batch = nf_tables_delset, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3991 | .attr_count = NFTA_SET_MAX, |
| 3992 | .policy = nft_set_policy, |
| 3993 | }, |
| 3994 | [NFT_MSG_NEWSETELEM] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 3995 | .call_batch = nf_tables_newsetelem, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 3996 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
| 3997 | .policy = nft_set_elem_list_policy, |
| 3998 | }, |
| 3999 | [NFT_MSG_GETSETELEM] = { |
| 4000 | .call = nf_tables_getsetelem, |
| 4001 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
| 4002 | .policy = nft_set_elem_list_policy, |
| 4003 | }, |
| 4004 | [NFT_MSG_DELSETELEM] = { |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4005 | .call_batch = nf_tables_delsetelem, |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4006 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
| 4007 | .policy = nft_set_elem_list_policy, |
| 4008 | }, |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 4009 | [NFT_MSG_GETGEN] = { |
| 4010 | .call = nf_tables_getgen, |
| 4011 | }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4012 | }; |
| 4013 | |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4014 | static void nft_chain_commit_update(struct nft_trans *trans) |
| 4015 | { |
| 4016 | struct nft_base_chain *basechain; |
| 4017 | |
| 4018 | if (nft_trans_chain_name(trans)[0]) |
| 4019 | strcpy(trans->ctx.chain->name, nft_trans_chain_name(trans)); |
| 4020 | |
| 4021 | if (!(trans->ctx.chain->flags & NFT_BASE_CHAIN)) |
| 4022 | return; |
| 4023 | |
| 4024 | basechain = nft_base_chain(trans->ctx.chain); |
| 4025 | nft_chain_stats_replace(basechain, nft_trans_chain_stats(trans)); |
| 4026 | |
| 4027 | switch (nft_trans_chain_policy(trans)) { |
| 4028 | case NF_DROP: |
| 4029 | case NF_ACCEPT: |
| 4030 | basechain->policy = nft_trans_chain_policy(trans); |
| 4031 | break; |
| 4032 | } |
| 4033 | } |
| 4034 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 4035 | static void nf_tables_commit_release(struct nft_trans *trans) |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4036 | { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4037 | switch (trans->msg_type) { |
| 4038 | case NFT_MSG_DELTABLE: |
| 4039 | nf_tables_table_destroy(&trans->ctx); |
| 4040 | break; |
| 4041 | case NFT_MSG_DELCHAIN: |
| 4042 | nf_tables_chain_destroy(trans->ctx.chain); |
| 4043 | break; |
| 4044 | case NFT_MSG_DELRULE: |
| 4045 | nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); |
| 4046 | break; |
| 4047 | case NFT_MSG_DELSET: |
| 4048 | nft_set_destroy(nft_trans_set(trans)); |
| 4049 | break; |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 4050 | case NFT_MSG_DELSETELEM: |
| 4051 | nft_set_elem_destroy(nft_trans_elem_set(trans), |
Liping Zhang | 61f9e29 | 2016-10-22 18:51:25 +0800 | [diff] [blame] | 4052 | nft_trans_elem(trans).priv, true); |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 4053 | break; |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4054 | } |
| 4055 | kfree(trans); |
| 4056 | } |
| 4057 | |
Pablo Neira Ayuso | 5913bea | 2015-12-15 19:41:57 +0100 | [diff] [blame] | 4058 | static int nf_tables_commit(struct net *net, struct sk_buff *skb) |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4059 | { |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4060 | struct nft_trans *trans, *next; |
Pablo Neira Ayuso | a3716e7 | 2014-08-01 19:32:41 +0200 | [diff] [blame] | 4061 | struct nft_trans_elem *te; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4062 | |
| 4063 | /* Bump generation counter, invalidate any dump in progress */ |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 4064 | while (++net->nft.base_seq == 0); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4065 | |
| 4066 | /* A new generation has just started */ |
Patrick McHardy | ea4bd99 | 2015-03-25 14:08:49 +0000 | [diff] [blame] | 4067 | net->nft.gencursor = nft_gencursor_next(net); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4068 | |
| 4069 | /* Make sure all packets have left the previous generation before |
| 4070 | * purging old rules. |
| 4071 | */ |
| 4072 | synchronize_rcu(); |
| 4073 | |
| 4074 | 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] | 4075 | switch (trans->msg_type) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4076 | case NFT_MSG_NEWTABLE: |
| 4077 | if (nft_trans_table_update(trans)) { |
| 4078 | if (!nft_trans_table_enable(trans)) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4079 | nf_tables_table_disable(net, |
| 4080 | trans->ctx.afi, |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4081 | trans->ctx.table); |
| 4082 | trans->ctx.table->flags |= NFT_TABLE_F_DORMANT; |
| 4083 | } |
| 4084 | } else { |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 4085 | nft_clear(net, trans->ctx.table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4086 | } |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4087 | nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4088 | nft_trans_destroy(trans); |
| 4089 | break; |
| 4090 | case NFT_MSG_DELTABLE: |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 4091 | list_del_rcu(&trans->ctx.table->list); |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4092 | nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4093 | break; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4094 | case NFT_MSG_NEWCHAIN: |
| 4095 | if (nft_trans_chain_update(trans)) |
| 4096 | nft_chain_commit_update(trans); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4097 | else |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4098 | nft_clear(net, trans->ctx.chain); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4099 | |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4100 | nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4101 | nft_trans_destroy(trans); |
| 4102 | break; |
| 4103 | case NFT_MSG_DELCHAIN: |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4104 | list_del_rcu(&trans->ctx.chain->list); |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4105 | nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN); |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 4106 | nf_tables_unregister_hooks(trans->ctx.net, |
| 4107 | trans->ctx.table, |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 4108 | trans->ctx.chain, |
| 4109 | trans->ctx.afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4110 | break; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4111 | case NFT_MSG_NEWRULE: |
Pablo Neira Ayuso | 889f7ee | 2016-06-12 18:07:07 +0200 | [diff] [blame] | 4112 | nft_clear(trans->ctx.net, nft_trans_rule(trans)); |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4113 | nf_tables_rule_notify(&trans->ctx, |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4114 | nft_trans_rule(trans), |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4115 | NFT_MSG_NEWRULE); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4116 | nft_trans_destroy(trans); |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4117 | break; |
| 4118 | case NFT_MSG_DELRULE: |
| 4119 | list_del_rcu(&nft_trans_rule(trans)->list); |
Pablo Neira Ayuso | 35151d8 | 2014-05-05 17:12:40 +0200 | [diff] [blame] | 4120 | nf_tables_rule_notify(&trans->ctx, |
| 4121 | nft_trans_rule(trans), |
| 4122 | NFT_MSG_DELRULE); |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4123 | break; |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4124 | case NFT_MSG_NEWSET: |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 4125 | nft_clear(net, nft_trans_set(trans)); |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4126 | /* This avoids hitting -EBUSY when deleting the table |
| 4127 | * from the transaction. |
| 4128 | */ |
| 4129 | if (nft_trans_set(trans)->flags & NFT_SET_ANONYMOUS && |
| 4130 | !list_empty(&nft_trans_set(trans)->bindings)) |
| 4131 | trans->ctx.table->use--; |
| 4132 | |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4133 | nf_tables_set_notify(&trans->ctx, nft_trans_set(trans), |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 4134 | NFT_MSG_NEWSET, GFP_KERNEL); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4135 | nft_trans_destroy(trans); |
| 4136 | break; |
| 4137 | case NFT_MSG_DELSET: |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 4138 | list_del_rcu(&nft_trans_set(trans)->list); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4139 | nf_tables_set_notify(&trans->ctx, nft_trans_set(trans), |
Pablo Neira Ayuso | 31f8441 | 2014-05-29 10:29:58 +0200 | [diff] [blame] | 4140 | NFT_MSG_DELSET, GFP_KERNEL); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4141 | break; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4142 | case NFT_MSG_NEWSETELEM: |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 4143 | te = (struct nft_trans_elem *)trans->data; |
| 4144 | |
Pablo Neira Ayuso | 42a5576 | 2016-07-08 14:41:49 +0200 | [diff] [blame] | 4145 | te->set->ops->activate(net, te->set, &te->elem); |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 4146 | nf_tables_setelem_notify(&trans->ctx, te->set, |
| 4147 | &te->elem, |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4148 | NFT_MSG_NEWSETELEM, 0); |
| 4149 | nft_trans_destroy(trans); |
| 4150 | break; |
| 4151 | case NFT_MSG_DELSETELEM: |
Pablo Neira Ayuso | a3716e7 | 2014-08-01 19:32:41 +0200 | [diff] [blame] | 4152 | te = (struct nft_trans_elem *)trans->data; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4153 | |
Pablo Neira Ayuso | a3716e7 | 2014-08-01 19:32:41 +0200 | [diff] [blame] | 4154 | nf_tables_setelem_notify(&trans->ctx, te->set, |
| 4155 | &te->elem, |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4156 | NFT_MSG_DELSETELEM, 0); |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 4157 | te->set->ops->remove(te->set, &te->elem); |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 4158 | atomic_dec(&te->set->nelems); |
| 4159 | te->set->ndeact--; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4160 | break; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4161 | } |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4162 | } |
| 4163 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 4164 | synchronize_rcu(); |
| 4165 | |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4166 | 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] | 4167 | list_del(&trans->list); |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 4168 | nf_tables_commit_release(trans); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4169 | } |
| 4170 | |
Pablo Neira Ayuso | 84d7fce | 2014-09-04 14:30:22 +0200 | [diff] [blame] | 4171 | nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN); |
| 4172 | |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4173 | return 0; |
| 4174 | } |
| 4175 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 4176 | static void nf_tables_abort_release(struct nft_trans *trans) |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4177 | { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4178 | switch (trans->msg_type) { |
| 4179 | case NFT_MSG_NEWTABLE: |
| 4180 | nf_tables_table_destroy(&trans->ctx); |
| 4181 | break; |
| 4182 | case NFT_MSG_NEWCHAIN: |
| 4183 | nf_tables_chain_destroy(trans->ctx.chain); |
| 4184 | break; |
| 4185 | case NFT_MSG_NEWRULE: |
| 4186 | nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); |
| 4187 | break; |
| 4188 | case NFT_MSG_NEWSET: |
| 4189 | nft_set_destroy(nft_trans_set(trans)); |
| 4190 | break; |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 4191 | case NFT_MSG_NEWSETELEM: |
| 4192 | nft_set_elem_destroy(nft_trans_elem_set(trans), |
Liping Zhang | 61f9e29 | 2016-10-22 18:51:25 +0800 | [diff] [blame] | 4193 | nft_trans_elem(trans).priv, true); |
Patrick McHardy | 61edafb | 2015-03-25 14:08:47 +0000 | [diff] [blame] | 4194 | break; |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4195 | } |
| 4196 | kfree(trans); |
| 4197 | } |
| 4198 | |
Pablo Neira Ayuso | 5913bea | 2015-12-15 19:41:57 +0100 | [diff] [blame] | 4199 | static int nf_tables_abort(struct net *net, struct sk_buff *skb) |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4200 | { |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4201 | struct nft_trans *trans, *next; |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 4202 | struct nft_trans_elem *te; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4203 | |
Xin Long | a907e36 | 2015-12-07 18:48:07 +0800 | [diff] [blame] | 4204 | list_for_each_entry_safe_reverse(trans, next, &net->nft.commit_list, |
| 4205 | list) { |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4206 | switch (trans->msg_type) { |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4207 | case NFT_MSG_NEWTABLE: |
| 4208 | if (nft_trans_table_update(trans)) { |
| 4209 | if (nft_trans_table_enable(trans)) { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4210 | nf_tables_table_disable(net, |
| 4211 | trans->ctx.afi, |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4212 | trans->ctx.table); |
| 4213 | trans->ctx.table->flags |= NFT_TABLE_F_DORMANT; |
| 4214 | } |
| 4215 | nft_trans_destroy(trans); |
| 4216 | } else { |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 4217 | list_del_rcu(&trans->ctx.table->list); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4218 | } |
| 4219 | break; |
| 4220 | case NFT_MSG_DELTABLE: |
Pablo Neira Ayuso | f2a6d76 | 2016-06-14 17:29:18 +0200 | [diff] [blame] | 4221 | nft_clear(trans->ctx.net, trans->ctx.table); |
Pablo Neira Ayuso | 55dd6f9 | 2014-04-03 11:53:37 +0200 | [diff] [blame] | 4222 | nft_trans_destroy(trans); |
| 4223 | break; |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4224 | case NFT_MSG_NEWCHAIN: |
| 4225 | if (nft_trans_chain_update(trans)) { |
Markus Elfring | 982f405 | 2014-11-18 20:37:05 +0100 | [diff] [blame] | 4226 | free_percpu(nft_trans_chain_stats(trans)); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4227 | |
| 4228 | nft_trans_destroy(trans); |
| 4229 | } else { |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4230 | trans->ctx.table->use--; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 4231 | list_del_rcu(&trans->ctx.chain->list); |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 4232 | nf_tables_unregister_hooks(trans->ctx.net, |
| 4233 | trans->ctx.table, |
Arturo Borrero | c559879 | 2014-09-02 16:42:23 +0200 | [diff] [blame] | 4234 | trans->ctx.chain, |
| 4235 | trans->ctx.afi->nops); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4236 | } |
| 4237 | break; |
| 4238 | case NFT_MSG_DELCHAIN: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4239 | trans->ctx.table->use++; |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4240 | nft_clear(trans->ctx.net, trans->ctx.chain); |
Pablo Neira Ayuso | 91c7b38 | 2014-04-09 11:58:08 +0200 | [diff] [blame] | 4241 | nft_trans_destroy(trans); |
| 4242 | break; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4243 | case NFT_MSG_NEWRULE: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4244 | trans->ctx.chain->use--; |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4245 | list_del_rcu(&nft_trans_rule(trans)->list); |
| 4246 | break; |
| 4247 | case NFT_MSG_DELRULE: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4248 | trans->ctx.chain->use++; |
Pablo Neira Ayuso | 889f7ee | 2016-06-12 18:07:07 +0200 | [diff] [blame] | 4249 | nft_clear(trans->ctx.net, nft_trans_rule(trans)); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4250 | nft_trans_destroy(trans); |
Pablo Neira Ayuso | b380e5c | 2014-04-04 01:38:51 +0200 | [diff] [blame] | 4251 | break; |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4252 | case NFT_MSG_NEWSET: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4253 | trans->ctx.table->use--; |
Pablo Neira Ayuso | e688a7f | 2014-07-01 11:49:18 +0200 | [diff] [blame] | 4254 | list_del_rcu(&nft_trans_set(trans)->list); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4255 | break; |
| 4256 | case NFT_MSG_DELSET: |
Pablo Neira Ayuso | 4fefee5 | 2014-05-23 12:39:26 +0200 | [diff] [blame] | 4257 | trans->ctx.table->use++; |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 4258 | nft_clear(trans->ctx.net, nft_trans_set(trans)); |
Pablo Neira Ayuso | 958bee1 | 2014-04-03 11:48:44 +0200 | [diff] [blame] | 4259 | nft_trans_destroy(trans); |
| 4260 | break; |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4261 | case NFT_MSG_NEWSETELEM: |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 4262 | te = (struct nft_trans_elem *)trans->data; |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4263 | |
Pablo Neira Ayuso | 02263db | 2015-02-20 17:11:10 +0100 | [diff] [blame] | 4264 | te->set->ops->remove(te->set, &te->elem); |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 4265 | atomic_dec(&te->set->nelems); |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4266 | break; |
| 4267 | case NFT_MSG_DELSETELEM: |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 4268 | te = (struct nft_trans_elem *)trans->data; |
| 4269 | |
Pablo Neira Ayuso | 42a5576 | 2016-07-08 14:41:49 +0200 | [diff] [blame] | 4270 | te->set->ops->activate(net, te->set, &te->elem); |
Patrick McHardy | 3dd0673 | 2015-04-05 14:41:06 +0200 | [diff] [blame] | 4271 | te->set->ndeact--; |
Patrick McHardy | cc02e45 | 2015-03-25 14:08:50 +0000 | [diff] [blame] | 4272 | |
Pablo Neira Ayuso | 60319eb | 2014-04-04 03:36:42 +0200 | [diff] [blame] | 4273 | nft_trans_destroy(trans); |
| 4274 | break; |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4275 | } |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4276 | } |
| 4277 | |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 4278 | synchronize_rcu(); |
| 4279 | |
Pablo Neira Ayuso | a1cee07 | 2014-05-23 11:09:42 +0200 | [diff] [blame] | 4280 | list_for_each_entry_safe_reverse(trans, next, |
| 4281 | &net->nft.commit_list, list) { |
Pablo Neira Ayuso | c7c32e7 | 2014-04-10 00:31:10 +0200 | [diff] [blame] | 4282 | list_del(&trans->list); |
Pablo Neira Ayuso | b326dd3 | 2014-11-10 21:14:12 +0100 | [diff] [blame] | 4283 | nf_tables_abort_release(trans); |
Pablo Neira Ayuso | 37082f9 | 2014-04-03 11:56:37 +0200 | [diff] [blame] | 4284 | } |
| 4285 | |
| 4286 | return 0; |
| 4287 | } |
| 4288 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4289 | static const struct nfnetlink_subsystem nf_tables_subsys = { |
| 4290 | .name = "nf_tables", |
| 4291 | .subsys_id = NFNL_SUBSYS_NFTABLES, |
| 4292 | .cb_count = NFT_MSG_MAX, |
| 4293 | .cb = nf_tables_cb, |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 4294 | .commit = nf_tables_commit, |
| 4295 | .abort = nf_tables_abort, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4296 | }; |
| 4297 | |
Pablo Neira Ayuso | 7210e4e | 2014-10-13 19:50:22 +0200 | [diff] [blame] | 4298 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
| 4299 | enum nft_chain_type type) |
| 4300 | { |
| 4301 | const struct nft_base_chain *basechain; |
| 4302 | |
| 4303 | if (chain->flags & NFT_BASE_CHAIN) { |
| 4304 | basechain = nft_base_chain(chain); |
| 4305 | if (basechain->type->type != type) |
| 4306 | return -EOPNOTSUPP; |
| 4307 | } |
| 4308 | return 0; |
| 4309 | } |
| 4310 | EXPORT_SYMBOL_GPL(nft_chain_validate_dependency); |
| 4311 | |
Pablo Neira Ayuso | 75e8d06 | 2015-01-14 15:33:57 +0100 | [diff] [blame] | 4312 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
| 4313 | unsigned int hook_flags) |
| 4314 | { |
| 4315 | struct nft_base_chain *basechain; |
| 4316 | |
| 4317 | if (chain->flags & NFT_BASE_CHAIN) { |
| 4318 | basechain = nft_base_chain(chain); |
| 4319 | |
| 4320 | if ((1 << basechain->ops[0].hooknum) & hook_flags) |
| 4321 | return 0; |
| 4322 | |
| 4323 | return -EOPNOTSUPP; |
| 4324 | } |
| 4325 | |
| 4326 | return 0; |
| 4327 | } |
| 4328 | EXPORT_SYMBOL_GPL(nft_chain_validate_hooks); |
| 4329 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4330 | /* |
| 4331 | * Loop detection - walk through the ruleset beginning at the destination chain |
| 4332 | * of a new jump until either the source chain is reached (loop) or all |
| 4333 | * reachable chains have been traversed. |
| 4334 | * |
| 4335 | * The loop check is performed whenever a new jump verdict is added to an |
| 4336 | * expression or verdict map or a verdict map is bound to a new chain. |
| 4337 | */ |
| 4338 | |
| 4339 | static int nf_tables_check_loops(const struct nft_ctx *ctx, |
| 4340 | const struct nft_chain *chain); |
| 4341 | |
| 4342 | static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx, |
| 4343 | const struct nft_set *set, |
| 4344 | const struct nft_set_iter *iter, |
| 4345 | const struct nft_set_elem *elem) |
| 4346 | { |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4347 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
| 4348 | const struct nft_data *data; |
| 4349 | |
| 4350 | if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) && |
| 4351 | *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END) |
Pablo Neira Ayuso | 62f9c8b | 2014-02-07 14:45:01 +0100 | [diff] [blame] | 4352 | return 0; |
| 4353 | |
Patrick McHardy | fe2811e | 2015-03-25 13:07:50 +0000 | [diff] [blame] | 4354 | data = nft_set_ext_data(ext); |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4355 | switch (data->verdict.code) { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4356 | case NFT_JUMP: |
| 4357 | case NFT_GOTO: |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4358 | return nf_tables_check_loops(ctx, data->verdict.chain); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4359 | default: |
| 4360 | return 0; |
| 4361 | } |
| 4362 | } |
| 4363 | |
| 4364 | static int nf_tables_check_loops(const struct nft_ctx *ctx, |
| 4365 | const struct nft_chain *chain) |
| 4366 | { |
| 4367 | const struct nft_rule *rule; |
| 4368 | const struct nft_expr *expr, *last; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4369 | const struct nft_set *set; |
| 4370 | struct nft_set_binding *binding; |
| 4371 | struct nft_set_iter iter; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4372 | |
| 4373 | if (ctx->chain == chain) |
| 4374 | return -ELOOP; |
| 4375 | |
| 4376 | list_for_each_entry(rule, &chain->rules, list) { |
| 4377 | nft_rule_for_each_expr(expr, last, rule) { |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 4378 | const struct nft_data *data = NULL; |
| 4379 | int err; |
| 4380 | |
| 4381 | if (!expr->ops->validate) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4382 | continue; |
| 4383 | |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 4384 | err = expr->ops->validate(ctx, expr, &data); |
| 4385 | if (err < 0) |
| 4386 | return err; |
| 4387 | |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4388 | if (data == NULL) |
Pablo Neira Ayuso | 0ca743a | 2013-10-14 00:06:06 +0200 | [diff] [blame] | 4389 | continue; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4390 | |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4391 | switch (data->verdict.code) { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4392 | case NFT_JUMP: |
| 4393 | case NFT_GOTO: |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4394 | err = nf_tables_check_loops(ctx, |
| 4395 | data->verdict.chain); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4396 | if (err < 0) |
| 4397 | return err; |
| 4398 | default: |
| 4399 | break; |
| 4400 | } |
| 4401 | } |
| 4402 | } |
| 4403 | |
| 4404 | list_for_each_entry(set, &ctx->table->sets, list) { |
Pablo Neira Ayuso | 37a9cc5 | 2016-06-12 22:52:45 +0200 | [diff] [blame] | 4405 | if (!nft_is_active_next(ctx->net, set)) |
| 4406 | continue; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4407 | if (!(set->flags & NFT_SET_MAP) || |
| 4408 | set->dtype != NFT_DATA_VERDICT) |
| 4409 | continue; |
| 4410 | |
| 4411 | list_for_each_entry(binding, &set->bindings, list) { |
Patrick McHardy | 11113e1 | 2015-04-05 14:41:07 +0200 | [diff] [blame] | 4412 | if (!(binding->flags & NFT_SET_MAP) || |
| 4413 | binding->chain != chain) |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4414 | continue; |
| 4415 | |
Pablo Neira Ayuso | 8588ac0 | 2016-06-11 12:20:27 +0800 | [diff] [blame] | 4416 | iter.genmask = nft_genmask_next(ctx->net); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4417 | iter.skip = 0; |
| 4418 | iter.count = 0; |
| 4419 | iter.err = 0; |
| 4420 | iter.fn = nf_tables_loop_check_setelem; |
| 4421 | |
| 4422 | set->ops->walk(ctx, set, &iter); |
| 4423 | if (iter.err < 0) |
| 4424 | return iter.err; |
| 4425 | } |
| 4426 | } |
| 4427 | |
| 4428 | return 0; |
| 4429 | } |
| 4430 | |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4431 | /** |
Laura Garcia Liebana | 36b701f | 2016-09-14 15:00:02 +0200 | [diff] [blame] | 4432 | * nft_parse_u32_check - fetch u32 attribute and check for maximum value |
| 4433 | * |
| 4434 | * @attr: netlink attribute to fetch value from |
| 4435 | * @max: maximum value to be stored in dest |
| 4436 | * @dest: pointer to the variable |
| 4437 | * |
| 4438 | * Parse, check and store a given u32 netlink attribute into variable. |
| 4439 | * This function returns -ERANGE if the value goes over maximum value. |
| 4440 | * Otherwise a 0 is returned and the attribute value is stored in the |
| 4441 | * destination variable. |
| 4442 | */ |
John W. Linville | f1d505b | 2016-10-25 15:56:39 -0400 | [diff] [blame] | 4443 | int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest) |
Laura Garcia Liebana | 36b701f | 2016-09-14 15:00:02 +0200 | [diff] [blame] | 4444 | { |
Dan Carpenter | 09525a0 | 2016-10-12 12:14:29 +0300 | [diff] [blame] | 4445 | u32 val; |
Laura Garcia Liebana | 36b701f | 2016-09-14 15:00:02 +0200 | [diff] [blame] | 4446 | |
| 4447 | val = ntohl(nla_get_be32(attr)); |
| 4448 | if (val > max) |
| 4449 | return -ERANGE; |
| 4450 | |
| 4451 | *dest = val; |
| 4452 | return 0; |
| 4453 | } |
| 4454 | EXPORT_SYMBOL_GPL(nft_parse_u32_check); |
| 4455 | |
| 4456 | /** |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4457 | * nft_parse_register - parse a register value from a netlink attribute |
| 4458 | * |
| 4459 | * @attr: netlink attribute |
| 4460 | * |
| 4461 | * Parse and translate a register value from a netlink attribute. |
| 4462 | * Registers used to be 128 bit wide, these register numbers will be |
| 4463 | * mapped to the corresponding 32 bit register numbers. |
| 4464 | */ |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 4465 | unsigned int nft_parse_register(const struct nlattr *attr) |
| 4466 | { |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4467 | unsigned int reg; |
| 4468 | |
| 4469 | reg = ntohl(nla_get_be32(attr)); |
| 4470 | switch (reg) { |
| 4471 | case NFT_REG_VERDICT...NFT_REG_4: |
| 4472 | return reg * NFT_REG_SIZE / NFT_REG32_SIZE; |
| 4473 | default: |
| 4474 | return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00; |
| 4475 | } |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 4476 | } |
| 4477 | EXPORT_SYMBOL_GPL(nft_parse_register); |
| 4478 | |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4479 | /** |
| 4480 | * nft_dump_register - dump a register value to a netlink attribute |
| 4481 | * |
| 4482 | * @skb: socket buffer |
| 4483 | * @attr: attribute number |
| 4484 | * @reg: register number |
| 4485 | * |
| 4486 | * Construct a netlink attribute containing the register number. For |
| 4487 | * compatibility reasons, register numbers being a multiple of 4 are |
| 4488 | * translated to the corresponding 128 bit register numbers. |
| 4489 | */ |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 4490 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg) |
| 4491 | { |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4492 | if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0) |
| 4493 | reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE); |
| 4494 | else |
| 4495 | reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00; |
| 4496 | |
Patrick McHardy | b1c96ed | 2015-04-11 02:27:36 +0100 | [diff] [blame] | 4497 | return nla_put_be32(skb, attr, htonl(reg)); |
| 4498 | } |
| 4499 | EXPORT_SYMBOL_GPL(nft_dump_register); |
| 4500 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4501 | /** |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4502 | * nft_validate_register_load - validate a load from a register |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4503 | * |
| 4504 | * @reg: the register number |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4505 | * @len: the length of the data |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4506 | * |
| 4507 | * Validate that the input register is one of the general purpose |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4508 | * registers and that the length of the load is within the bounds. |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4509 | */ |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4510 | int nft_validate_register_load(enum nft_registers reg, unsigned int len) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4511 | { |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4512 | if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4513 | return -EINVAL; |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4514 | if (len == 0) |
| 4515 | return -EINVAL; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4516 | if (reg * NFT_REG32_SIZE + len > FIELD_SIZEOF(struct nft_regs, data)) |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4517 | return -ERANGE; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4518 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4519 | return 0; |
| 4520 | } |
Patrick McHardy | d07db98 | 2015-04-11 02:27:30 +0100 | [diff] [blame] | 4521 | EXPORT_SYMBOL_GPL(nft_validate_register_load); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4522 | |
| 4523 | /** |
Patrick McHardy | 1ec1021 | 2015-04-11 02:27:27 +0100 | [diff] [blame] | 4524 | * nft_validate_register_store - validate an expressions' register store |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4525 | * |
| 4526 | * @ctx: context of the expression performing the load |
| 4527 | * @reg: the destination register number |
| 4528 | * @data: the data to load |
| 4529 | * @type: the data type |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 4530 | * @len: the length of the data |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4531 | * |
| 4532 | * Validate that a data load uses the appropriate data type for |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 4533 | * the destination register and the length is within the bounds. |
| 4534 | * A value of NULL for the data means that its runtime gathered |
Patrick McHardy | 58f40ab | 2015-04-11 02:27:28 +0100 | [diff] [blame] | 4535 | * data. |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4536 | */ |
Patrick McHardy | 1ec1021 | 2015-04-11 02:27:27 +0100 | [diff] [blame] | 4537 | int nft_validate_register_store(const struct nft_ctx *ctx, |
| 4538 | enum nft_registers reg, |
| 4539 | const struct nft_data *data, |
| 4540 | enum nft_data_types type, unsigned int len) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4541 | { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4542 | int err; |
| 4543 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4544 | switch (reg) { |
| 4545 | case NFT_REG_VERDICT: |
Patrick McHardy | 58f40ab | 2015-04-11 02:27:28 +0100 | [diff] [blame] | 4546 | if (type != NFT_DATA_VERDICT) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4547 | return -EINVAL; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4548 | |
Patrick McHardy | 58f40ab | 2015-04-11 02:27:28 +0100 | [diff] [blame] | 4549 | if (data != NULL && |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4550 | (data->verdict.code == NFT_GOTO || |
| 4551 | data->verdict.code == NFT_JUMP)) { |
| 4552 | err = nf_tables_check_loops(ctx, data->verdict.chain); |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4553 | if (err < 0) |
| 4554 | return err; |
| 4555 | |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4556 | if (ctx->chain->level + 1 > |
| 4557 | data->verdict.chain->level) { |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4558 | if (ctx->chain->level + 1 == NFT_JUMP_STACK_SIZE) |
| 4559 | return -EMLINK; |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4560 | data->verdict.chain->level = ctx->chain->level + 1; |
Patrick McHardy | 20a6934 | 2013-10-11 12:06:22 +0200 | [diff] [blame] | 4561 | } |
| 4562 | } |
| 4563 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4564 | return 0; |
| 4565 | default: |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4566 | if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE) |
Patrick McHardy | 27e6d20 | 2015-04-11 02:27:29 +0100 | [diff] [blame] | 4567 | return -EINVAL; |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 4568 | if (len == 0) |
| 4569 | return -EINVAL; |
Patrick McHardy | 49499c3 | 2015-04-11 02:27:37 +0100 | [diff] [blame] | 4570 | if (reg * NFT_REG32_SIZE + len > |
| 4571 | FIELD_SIZEOF(struct nft_regs, data)) |
Patrick McHardy | 45d9bcd | 2015-04-11 02:27:26 +0100 | [diff] [blame] | 4572 | return -ERANGE; |
Patrick McHardy | 27e6d20 | 2015-04-11 02:27:29 +0100 | [diff] [blame] | 4573 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4574 | if (data != NULL && type != NFT_DATA_VALUE) |
| 4575 | return -EINVAL; |
| 4576 | return 0; |
| 4577 | } |
| 4578 | } |
Patrick McHardy | 1ec1021 | 2015-04-11 02:27:27 +0100 | [diff] [blame] | 4579 | EXPORT_SYMBOL_GPL(nft_validate_register_store); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4580 | |
| 4581 | static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = { |
| 4582 | [NFTA_VERDICT_CODE] = { .type = NLA_U32 }, |
| 4583 | [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING, |
| 4584 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, |
| 4585 | }; |
| 4586 | |
| 4587 | static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data, |
| 4588 | struct nft_data_desc *desc, const struct nlattr *nla) |
| 4589 | { |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4590 | u8 genmask = nft_genmask_next(ctx->net); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4591 | struct nlattr *tb[NFTA_VERDICT_MAX + 1]; |
| 4592 | struct nft_chain *chain; |
| 4593 | int err; |
| 4594 | |
| 4595 | err = nla_parse_nested(tb, NFTA_VERDICT_MAX, nla, nft_verdict_policy); |
| 4596 | if (err < 0) |
| 4597 | return err; |
| 4598 | |
| 4599 | if (!tb[NFTA_VERDICT_CODE]) |
| 4600 | return -EINVAL; |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4601 | data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE])); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4602 | |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4603 | switch (data->verdict.code) { |
Patrick McHardy | e0abdad | 2014-02-18 18:06:50 +0000 | [diff] [blame] | 4604 | default: |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4605 | switch (data->verdict.code & NF_VERDICT_MASK) { |
Patrick McHardy | e0abdad | 2014-02-18 18:06:50 +0000 | [diff] [blame] | 4606 | case NF_ACCEPT: |
| 4607 | case NF_DROP: |
| 4608 | case NF_QUEUE: |
| 4609 | break; |
| 4610 | default: |
| 4611 | return -EINVAL; |
| 4612 | } |
| 4613 | /* fall through */ |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4614 | case NFT_CONTINUE: |
| 4615 | case NFT_BREAK: |
| 4616 | case NFT_RETURN: |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4617 | break; |
| 4618 | case NFT_JUMP: |
| 4619 | case NFT_GOTO: |
| 4620 | if (!tb[NFTA_VERDICT_CHAIN]) |
| 4621 | return -EINVAL; |
| 4622 | chain = nf_tables_chain_lookup(ctx->table, |
Pablo Neira Ayuso | 664b0f8 | 2016-06-12 19:21:31 +0200 | [diff] [blame] | 4623 | tb[NFTA_VERDICT_CHAIN], genmask); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4624 | if (IS_ERR(chain)) |
| 4625 | return PTR_ERR(chain); |
| 4626 | if (chain->flags & NFT_BASE_CHAIN) |
| 4627 | return -EOPNOTSUPP; |
| 4628 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4629 | chain->use++; |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4630 | data->verdict.chain = chain; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4631 | break; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4632 | } |
| 4633 | |
Florian Westphal | 4c4ed07 | 2015-04-14 16:44:14 +0200 | [diff] [blame] | 4634 | desc->len = sizeof(data->verdict); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4635 | desc->type = NFT_DATA_VERDICT; |
| 4636 | return 0; |
| 4637 | } |
| 4638 | |
| 4639 | static void nft_verdict_uninit(const struct nft_data *data) |
| 4640 | { |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4641 | switch (data->verdict.code) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4642 | case NFT_JUMP: |
| 4643 | case NFT_GOTO: |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4644 | data->verdict.chain->use--; |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4645 | break; |
| 4646 | } |
| 4647 | } |
| 4648 | |
Florian Westphal | 33d5a7b | 2015-11-28 21:53:04 +0100 | [diff] [blame] | 4649 | int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4650 | { |
| 4651 | struct nlattr *nest; |
| 4652 | |
Florian Westphal | 33d5a7b | 2015-11-28 21:53:04 +0100 | [diff] [blame] | 4653 | nest = nla_nest_start(skb, type); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4654 | if (!nest) |
| 4655 | goto nla_put_failure; |
| 4656 | |
Florian Westphal | 33d5a7b | 2015-11-28 21:53:04 +0100 | [diff] [blame] | 4657 | if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code))) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4658 | goto nla_put_failure; |
| 4659 | |
Florian Westphal | 33d5a7b | 2015-11-28 21:53:04 +0100 | [diff] [blame] | 4660 | switch (v->code) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4661 | case NFT_JUMP: |
| 4662 | case NFT_GOTO: |
Patrick McHardy | 1ca2e17 | 2015-04-11 02:27:32 +0100 | [diff] [blame] | 4663 | if (nla_put_string(skb, NFTA_VERDICT_CHAIN, |
Florian Westphal | 33d5a7b | 2015-11-28 21:53:04 +0100 | [diff] [blame] | 4664 | v->chain->name)) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4665 | goto nla_put_failure; |
| 4666 | } |
| 4667 | nla_nest_end(skb, nest); |
| 4668 | return 0; |
| 4669 | |
| 4670 | nla_put_failure: |
| 4671 | return -1; |
| 4672 | } |
| 4673 | |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4674 | static int nft_value_init(const struct nft_ctx *ctx, |
| 4675 | struct nft_data *data, unsigned int size, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4676 | struct nft_data_desc *desc, const struct nlattr *nla) |
| 4677 | { |
| 4678 | unsigned int len; |
| 4679 | |
| 4680 | len = nla_len(nla); |
| 4681 | if (len == 0) |
| 4682 | return -EINVAL; |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4683 | if (len > size) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4684 | return -EOVERFLOW; |
| 4685 | |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4686 | nla_memcpy(data->data, nla, len); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4687 | desc->type = NFT_DATA_VALUE; |
| 4688 | desc->len = len; |
| 4689 | return 0; |
| 4690 | } |
| 4691 | |
| 4692 | static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data, |
| 4693 | unsigned int len) |
| 4694 | { |
| 4695 | return nla_put(skb, NFTA_DATA_VALUE, len, data->data); |
| 4696 | } |
| 4697 | |
| 4698 | static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = { |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4699 | [NFTA_DATA_VALUE] = { .type = NLA_BINARY }, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4700 | [NFTA_DATA_VERDICT] = { .type = NLA_NESTED }, |
| 4701 | }; |
| 4702 | |
| 4703 | /** |
| 4704 | * nft_data_init - parse nf_tables data netlink attributes |
| 4705 | * |
| 4706 | * @ctx: context of the expression using the data |
| 4707 | * @data: destination struct nft_data |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4708 | * @size: maximum data length |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4709 | * @desc: data description |
| 4710 | * @nla: netlink attribute containing data |
| 4711 | * |
| 4712 | * Parse the netlink data attributes and initialize a struct nft_data. |
| 4713 | * The type and length of data are returned in the data description. |
| 4714 | * |
| 4715 | * The caller can indicate that it only wants to accept data of type |
| 4716 | * NFT_DATA_VALUE by passing NULL for the ctx argument. |
| 4717 | */ |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4718 | int nft_data_init(const struct nft_ctx *ctx, |
| 4719 | struct nft_data *data, unsigned int size, |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4720 | struct nft_data_desc *desc, const struct nlattr *nla) |
| 4721 | { |
| 4722 | struct nlattr *tb[NFTA_DATA_MAX + 1]; |
| 4723 | int err; |
| 4724 | |
| 4725 | err = nla_parse_nested(tb, NFTA_DATA_MAX, nla, nft_data_policy); |
| 4726 | if (err < 0) |
| 4727 | return err; |
| 4728 | |
| 4729 | if (tb[NFTA_DATA_VALUE]) |
Patrick McHardy | d0a11fc | 2015-04-11 02:27:38 +0100 | [diff] [blame] | 4730 | return nft_value_init(ctx, data, size, desc, |
| 4731 | tb[NFTA_DATA_VALUE]); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4732 | if (tb[NFTA_DATA_VERDICT] && ctx != NULL) |
| 4733 | return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]); |
| 4734 | return -EINVAL; |
| 4735 | } |
| 4736 | EXPORT_SYMBOL_GPL(nft_data_init); |
| 4737 | |
| 4738 | /** |
| 4739 | * nft_data_uninit - release a nft_data item |
| 4740 | * |
| 4741 | * @data: struct nft_data to release |
| 4742 | * @type: type of data |
| 4743 | * |
| 4744 | * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded, |
| 4745 | * all others need to be released by calling this function. |
| 4746 | */ |
| 4747 | void nft_data_uninit(const struct nft_data *data, enum nft_data_types type) |
| 4748 | { |
Mirek Kratochvil | 960bd2c | 2015-05-15 21:15:29 +0200 | [diff] [blame] | 4749 | if (type < NFT_DATA_VERDICT) |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4750 | return; |
Mirek Kratochvil | 960bd2c | 2015-05-15 21:15:29 +0200 | [diff] [blame] | 4751 | switch (type) { |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4752 | case NFT_DATA_VERDICT: |
| 4753 | return nft_verdict_uninit(data); |
| 4754 | default: |
| 4755 | WARN_ON(1); |
| 4756 | } |
| 4757 | } |
| 4758 | EXPORT_SYMBOL_GPL(nft_data_uninit); |
| 4759 | |
| 4760 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, |
| 4761 | enum nft_data_types type, unsigned int len) |
| 4762 | { |
| 4763 | struct nlattr *nest; |
| 4764 | int err; |
| 4765 | |
| 4766 | nest = nla_nest_start(skb, attr); |
| 4767 | if (nest == NULL) |
| 4768 | return -1; |
| 4769 | |
| 4770 | switch (type) { |
| 4771 | case NFT_DATA_VALUE: |
| 4772 | err = nft_value_dump(skb, data, len); |
| 4773 | break; |
| 4774 | case NFT_DATA_VERDICT: |
Florian Westphal | 33d5a7b | 2015-11-28 21:53:04 +0100 | [diff] [blame] | 4775 | err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4776 | break; |
| 4777 | default: |
| 4778 | err = -EINVAL; |
| 4779 | WARN_ON(1); |
| 4780 | } |
| 4781 | |
| 4782 | nla_nest_end(skb, nest); |
| 4783 | return err; |
| 4784 | } |
| 4785 | EXPORT_SYMBOL_GPL(nft_data_dump); |
| 4786 | |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 4787 | static int __net_init nf_tables_init_net(struct net *net) |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4788 | { |
| 4789 | INIT_LIST_HEAD(&net->nft.af_info); |
Pablo Neira Ayuso | 0628b12 | 2013-10-14 11:05:33 +0200 | [diff] [blame] | 4790 | INIT_LIST_HEAD(&net->nft.commit_list); |
Pablo Neira Ayuso | 38e029f | 2014-07-01 12:23:12 +0200 | [diff] [blame] | 4791 | net->nft.base_seq = 1; |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4792 | return 0; |
| 4793 | } |
| 4794 | |
Pablo Neira Ayuso | 5ebe0b0 | 2015-12-15 19:40:49 +0100 | [diff] [blame] | 4795 | int __nft_release_basechain(struct nft_ctx *ctx) |
| 4796 | { |
| 4797 | struct nft_rule *rule, *nr; |
| 4798 | |
| 4799 | BUG_ON(!(ctx->chain->flags & NFT_BASE_CHAIN)); |
| 4800 | |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 4801 | nf_tables_unregister_hooks(ctx->net, ctx->chain->table, ctx->chain, |
Pablo Neira Ayuso | 5ebe0b0 | 2015-12-15 19:40:49 +0100 | [diff] [blame] | 4802 | ctx->afi->nops); |
| 4803 | list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) { |
| 4804 | list_del(&rule->list); |
| 4805 | ctx->chain->use--; |
| 4806 | nf_tables_rule_destroy(ctx, rule); |
| 4807 | } |
| 4808 | list_del(&ctx->chain->list); |
| 4809 | ctx->table->use--; |
| 4810 | nf_tables_chain_destroy(ctx->chain); |
| 4811 | |
| 4812 | return 0; |
| 4813 | } |
| 4814 | EXPORT_SYMBOL_GPL(__nft_release_basechain); |
| 4815 | |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 4816 | /* Called by nft_unregister_afinfo() from __net_exit path, nfnl_lock is held. */ |
| 4817 | static void __nft_release_afinfo(struct net *net, struct nft_af_info *afi) |
| 4818 | { |
| 4819 | struct nft_table *table, *nt; |
| 4820 | struct nft_chain *chain, *nc; |
| 4821 | struct nft_rule *rule, *nr; |
| 4822 | struct nft_set *set, *ns; |
| 4823 | struct nft_ctx ctx = { |
| 4824 | .net = net, |
| 4825 | .afi = afi, |
| 4826 | }; |
| 4827 | |
| 4828 | list_for_each_entry_safe(table, nt, &afi->tables, list) { |
| 4829 | list_for_each_entry(chain, &table->chains, list) |
Pablo Neira Ayuso | 82bec71 | 2016-06-22 14:26:33 +0200 | [diff] [blame] | 4830 | nf_tables_unregister_hooks(net, table, chain, |
| 4831 | afi->nops); |
Pablo Neira Ayuso | df05ef8 | 2015-12-15 19:39:32 +0100 | [diff] [blame] | 4832 | /* No packets are walking on these chains anymore. */ |
| 4833 | ctx.table = table; |
| 4834 | list_for_each_entry(chain, &table->chains, list) { |
| 4835 | ctx.chain = chain; |
| 4836 | list_for_each_entry_safe(rule, nr, &chain->rules, list) { |
| 4837 | list_del(&rule->list); |
| 4838 | chain->use--; |
| 4839 | nf_tables_rule_destroy(&ctx, rule); |
| 4840 | } |
| 4841 | } |
| 4842 | list_for_each_entry_safe(set, ns, &table->sets, list) { |
| 4843 | list_del(&set->list); |
| 4844 | table->use--; |
| 4845 | nft_set_destroy(set); |
| 4846 | } |
| 4847 | list_for_each_entry_safe(chain, nc, &table->chains, list) { |
| 4848 | list_del(&chain->list); |
| 4849 | table->use--; |
| 4850 | nf_tables_chain_destroy(chain); |
| 4851 | } |
| 4852 | list_del(&table->list); |
| 4853 | nf_tables_table_destroy(&ctx); |
| 4854 | } |
| 4855 | } |
| 4856 | |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4857 | static struct pernet_operations nf_tables_net_ops = { |
| 4858 | .init = nf_tables_init_net, |
| 4859 | }; |
| 4860 | |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4861 | static int __init nf_tables_module_init(void) |
| 4862 | { |
| 4863 | int err; |
| 4864 | |
| 4865 | info = kmalloc(sizeof(struct nft_expr_info) * NFT_RULE_MAXEXPRS, |
| 4866 | GFP_KERNEL); |
| 4867 | if (info == NULL) { |
| 4868 | err = -ENOMEM; |
| 4869 | goto err1; |
| 4870 | } |
| 4871 | |
| 4872 | err = nf_tables_core_module_init(); |
| 4873 | if (err < 0) |
| 4874 | goto err2; |
| 4875 | |
| 4876 | err = nfnetlink_subsys_register(&nf_tables_subsys); |
| 4877 | if (err < 0) |
| 4878 | goto err3; |
| 4879 | |
| 4880 | 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] | 4881 | return register_pernet_subsys(&nf_tables_net_ops); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4882 | err3: |
| 4883 | nf_tables_core_module_exit(); |
| 4884 | err2: |
| 4885 | kfree(info); |
| 4886 | err1: |
| 4887 | return err; |
| 4888 | } |
| 4889 | |
| 4890 | static void __exit nf_tables_module_exit(void) |
| 4891 | { |
Pablo Neira Ayuso | 99633ab | 2013-10-10 23:28:33 +0200 | [diff] [blame] | 4892 | unregister_pernet_subsys(&nf_tables_net_ops); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4893 | nfnetlink_subsys_unregister(&nf_tables_subsys); |
Pablo Neira Ayuso | 1b1bc49 | 2014-10-01 13:53:20 +0200 | [diff] [blame] | 4894 | rcu_barrier(); |
Patrick McHardy | 9651851 | 2013-10-14 11:00:02 +0200 | [diff] [blame] | 4895 | nf_tables_core_module_exit(); |
| 4896 | kfree(info); |
| 4897 | } |
| 4898 | |
| 4899 | module_init(nf_tables_module_init); |
| 4900 | module_exit(nf_tables_module_exit); |
| 4901 | |
| 4902 | MODULE_LICENSE("GPL"); |
| 4903 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); |
| 4904 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES); |