Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2008-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 as |
| 5 | * published by the Free Software Foundation. |
| 6 | */ |
| 7 | |
| 8 | /* Kernel module implementing an IP set type: the list:set type */ |
| 9 | |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/ip.h> |
| 12 | #include <linux/skbuff.h> |
| 13 | #include <linux/errno.h> |
| 14 | |
| 15 | #include <linux/netfilter/ipset/ip_set.h> |
| 16 | #include <linux/netfilter/ipset/ip_set_timeout.h> |
| 17 | #include <linux/netfilter/ipset/ip_set_list.h> |
| 18 | |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 19 | #define REVISION_MIN 0 |
| 20 | #define REVISION_MAX 0 |
| 21 | |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 22 | MODULE_LICENSE("GPL"); |
| 23 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 24 | IP_SET_MODULE_DESC("list:set", REVISION_MIN, REVISION_MAX); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 25 | MODULE_ALIAS("ip_set_list:set"); |
| 26 | |
| 27 | /* Member elements without and with timeout */ |
| 28 | struct set_elem { |
| 29 | ip_set_id_t id; |
| 30 | }; |
| 31 | |
| 32 | struct set_telem { |
| 33 | ip_set_id_t id; |
| 34 | unsigned long timeout; |
| 35 | }; |
| 36 | |
| 37 | /* Type structure */ |
| 38 | struct list_set { |
| 39 | size_t dsize; /* element size */ |
| 40 | u32 size; /* size of set list array */ |
| 41 | u32 timeout; /* timeout value */ |
| 42 | struct timer_list gc; /* garbage collection */ |
| 43 | struct set_elem members[0]; /* the set members */ |
| 44 | }; |
| 45 | |
| 46 | static inline struct set_elem * |
| 47 | list_set_elem(const struct list_set *map, u32 id) |
| 48 | { |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 49 | return (struct set_elem *)((void *)map->members + id * map->dsize); |
| 50 | } |
| 51 | |
| 52 | static inline struct set_telem * |
| 53 | list_set_telem(const struct list_set *map, u32 id) |
| 54 | { |
| 55 | return (struct set_telem *)((void *)map->members + id * map->dsize); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | static inline bool |
| 59 | list_set_timeout(const struct list_set *map, u32 id) |
| 60 | { |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 61 | const struct set_telem *elem = list_set_telem(map, id); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 62 | |
| 63 | return ip_set_timeout_test(elem->timeout); |
| 64 | } |
| 65 | |
| 66 | static inline bool |
| 67 | list_set_expired(const struct list_set *map, u32 id) |
| 68 | { |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 69 | const struct set_telem *elem = list_set_telem(map, id); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 70 | |
| 71 | return ip_set_timeout_expired(elem->timeout); |
| 72 | } |
| 73 | |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 74 | /* Set list without and with timeout */ |
| 75 | |
| 76 | static int |
| 77 | list_set_kadt(struct ip_set *set, const struct sk_buff *skb, |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 78 | const struct xt_action_param *par, |
Jozsef Kadlecsik | ac8cc92 | 2011-06-16 18:42:40 +0200 | [diff] [blame] | 79 | enum ipset_adt adt, const struct ip_set_adt_opt *opt) |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 80 | { |
| 81 | struct list_set *map = set->data; |
| 82 | struct set_elem *elem; |
| 83 | u32 i; |
| 84 | int ret; |
| 85 | |
| 86 | for (i = 0; i < map->size; i++) { |
| 87 | elem = list_set_elem(map, i); |
| 88 | if (elem->id == IPSET_INVALID_ID) |
| 89 | return 0; |
| 90 | if (with_timeout(map->timeout) && list_set_expired(map, i)) |
| 91 | continue; |
| 92 | switch (adt) { |
| 93 | case IPSET_TEST: |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 94 | ret = ip_set_test(elem->id, skb, par, opt); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 95 | if (ret > 0) |
| 96 | return ret; |
| 97 | break; |
| 98 | case IPSET_ADD: |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 99 | ret = ip_set_add(elem->id, skb, par, opt); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 100 | if (ret == 0) |
| 101 | return ret; |
| 102 | break; |
| 103 | case IPSET_DEL: |
Jozsef Kadlecsik | b66554c | 2011-06-16 18:56:47 +0200 | [diff] [blame] | 104 | ret = ip_set_del(elem->id, skb, par, opt); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 105 | if (ret == 0) |
| 106 | return ret; |
| 107 | break; |
| 108 | default: |
| 109 | break; |
| 110 | } |
| 111 | } |
| 112 | return -EINVAL; |
| 113 | } |
| 114 | |
| 115 | static bool |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 116 | id_eq(const struct list_set *map, u32 i, ip_set_id_t id) |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 117 | { |
| 118 | const struct set_elem *elem; |
| 119 | |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 120 | if (i < map->size) { |
| 121 | elem = list_set_elem(map, i); |
| 122 | return elem->id == id; |
| 123 | } |
| 124 | |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static bool |
| 129 | id_eq_timeout(const struct list_set *map, u32 i, ip_set_id_t id) |
| 130 | { |
| 131 | const struct set_elem *elem; |
| 132 | |
| 133 | if (i < map->size) { |
| 134 | elem = list_set_elem(map, i); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 135 | return !!(elem->id == id && |
| 136 | !(with_timeout(map->timeout) && |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 137 | list_set_expired(map, i))); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static void |
| 144 | list_elem_add(struct list_set *map, u32 i, ip_set_id_t id) |
| 145 | { |
| 146 | struct set_elem *e; |
| 147 | |
| 148 | for (; i < map->size; i++) { |
| 149 | e = list_set_elem(map, i); |
| 150 | swap(e->id, id); |
| 151 | if (e->id == IPSET_INVALID_ID) |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | static void |
| 157 | list_elem_tadd(struct list_set *map, u32 i, ip_set_id_t id, |
| 158 | unsigned long timeout) |
| 159 | { |
| 160 | struct set_telem *e; |
| 161 | |
| 162 | for (; i < map->size; i++) { |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 163 | e = list_set_telem(map, i); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 164 | swap(e->id, id); |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 165 | swap(e->timeout, timeout); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 166 | if (e->id == IPSET_INVALID_ID) |
| 167 | break; |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 168 | } |
| 169 | } |
| 170 | |
| 171 | static int |
| 172 | list_set_add(struct list_set *map, u32 i, ip_set_id_t id, |
| 173 | unsigned long timeout) |
| 174 | { |
| 175 | const struct set_elem *e = list_set_elem(map, i); |
| 176 | |
| 177 | if (i == map->size - 1 && e->id != IPSET_INVALID_ID) |
| 178 | /* Last element replaced: e.g. add new,before,last */ |
| 179 | ip_set_put_byindex(e->id); |
| 180 | if (with_timeout(map->timeout)) |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 181 | list_elem_tadd(map, i, id, ip_set_timeout_set(timeout)); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 182 | else |
| 183 | list_elem_add(map, i, id); |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static int |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 189 | list_set_del(struct list_set *map, u32 i) |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 190 | { |
| 191 | struct set_elem *a = list_set_elem(map, i), *b; |
| 192 | |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 193 | ip_set_put_byindex(a->id); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 194 | |
| 195 | for (; i < map->size - 1; i++) { |
| 196 | b = list_set_elem(map, i + 1); |
| 197 | a->id = b->id; |
| 198 | if (with_timeout(map->timeout)) |
| 199 | ((struct set_telem *)a)->timeout = |
| 200 | ((struct set_telem *)b)->timeout; |
| 201 | a = b; |
| 202 | if (a->id == IPSET_INVALID_ID) |
| 203 | break; |
| 204 | } |
| 205 | /* Last element */ |
| 206 | a->id = IPSET_INVALID_ID; |
| 207 | return 0; |
| 208 | } |
| 209 | |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 210 | static void |
| 211 | cleanup_entries(struct list_set *map) |
| 212 | { |
| 213 | struct set_telem *e; |
| 214 | u32 i; |
| 215 | |
| 216 | for (i = 0; i < map->size; i++) { |
| 217 | e = list_set_telem(map, i); |
| 218 | if (e->id != IPSET_INVALID_ID && list_set_expired(map, i)) |
| 219 | list_set_del(map, i); |
| 220 | } |
| 221 | } |
| 222 | |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 223 | static int |
| 224 | list_set_uadt(struct ip_set *set, struct nlattr *tb[], |
Jozsef Kadlecsik | 3d14b17 | 2011-06-16 18:49:17 +0200 | [diff] [blame] | 225 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 226 | { |
| 227 | struct list_set *map = set->data; |
| 228 | bool with_timeout = with_timeout(map->timeout); |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 229 | bool flag_exist = flags & IPSET_FLAG_EXIST; |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 230 | int before = 0; |
| 231 | u32 timeout = map->timeout; |
| 232 | ip_set_id_t id, refid = IPSET_INVALID_ID; |
| 233 | const struct set_elem *elem; |
| 234 | struct ip_set *s; |
| 235 | u32 i; |
| 236 | int ret = 0; |
| 237 | |
| 238 | if (unlikely(!tb[IPSET_ATTR_NAME] || |
| 239 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
| 240 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) |
| 241 | return -IPSET_ERR_PROTOCOL; |
| 242 | |
| 243 | if (tb[IPSET_ATTR_LINENO]) |
| 244 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); |
| 245 | |
| 246 | id = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAME]), &s); |
| 247 | if (id == IPSET_INVALID_ID) |
| 248 | return -IPSET_ERR_NAME; |
| 249 | /* "Loop detection" */ |
| 250 | if (s->type->features & IPSET_TYPE_NAME) { |
| 251 | ret = -IPSET_ERR_LOOP; |
| 252 | goto finish; |
| 253 | } |
| 254 | |
| 255 | if (tb[IPSET_ATTR_CADT_FLAGS]) { |
| 256 | u32 f = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); |
| 257 | before = f & IPSET_FLAG_BEFORE; |
| 258 | } |
| 259 | |
| 260 | if (before && !tb[IPSET_ATTR_NAMEREF]) { |
| 261 | ret = -IPSET_ERR_BEFORE; |
| 262 | goto finish; |
| 263 | } |
| 264 | |
| 265 | if (tb[IPSET_ATTR_NAMEREF]) { |
| 266 | refid = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAMEREF]), |
| 267 | &s); |
| 268 | if (refid == IPSET_INVALID_ID) { |
| 269 | ret = -IPSET_ERR_NAMEREF; |
| 270 | goto finish; |
| 271 | } |
| 272 | if (!before) |
| 273 | before = -1; |
| 274 | } |
| 275 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 276 | if (!with_timeout) { |
| 277 | ret = -IPSET_ERR_TIMEOUT; |
| 278 | goto finish; |
| 279 | } |
| 280 | timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); |
| 281 | } |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 282 | if (with_timeout && adt != IPSET_TEST) |
| 283 | cleanup_entries(map); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 284 | |
| 285 | switch (adt) { |
| 286 | case IPSET_TEST: |
| 287 | for (i = 0; i < map->size && !ret; i++) { |
| 288 | elem = list_set_elem(map, i); |
| 289 | if (elem->id == IPSET_INVALID_ID || |
| 290 | (before != 0 && i + 1 >= map->size)) |
| 291 | break; |
| 292 | else if (with_timeout && list_set_expired(map, i)) |
| 293 | continue; |
| 294 | else if (before > 0 && elem->id == id) |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 295 | ret = id_eq_timeout(map, i + 1, refid); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 296 | else if (before < 0 && elem->id == refid) |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 297 | ret = id_eq_timeout(map, i + 1, id); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 298 | else if (before == 0 && elem->id == id) |
| 299 | ret = 1; |
| 300 | } |
| 301 | break; |
| 302 | case IPSET_ADD: |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 303 | for (i = 0; i < map->size; i++) { |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 304 | elem = list_set_elem(map, i); |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 305 | if (elem->id != id) |
| 306 | continue; |
| 307 | if (!(with_timeout && flag_exist)) { |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 308 | ret = -IPSET_ERR_EXIST; |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 309 | goto finish; |
| 310 | } else { |
| 311 | struct set_telem *e = list_set_telem(map, i); |
| 312 | |
| 313 | if ((before > 1 && |
| 314 | !id_eq(map, i + 1, refid)) || |
| 315 | (before < 0 && |
| 316 | (i == 0 || !id_eq(map, i - 1, refid)))) { |
Jozsef Kadlecsik | 483e9ea | 2011-06-16 18:41:53 +0200 | [diff] [blame] | 317 | ret = -IPSET_ERR_EXIST; |
| 318 | goto finish; |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 319 | } |
| 320 | e->timeout = ip_set_timeout_set(timeout); |
| 321 | ip_set_put_byindex(id); |
| 322 | ret = 0; |
| 323 | goto finish; |
| 324 | } |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 325 | } |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 326 | ret = -IPSET_ERR_LIST_FULL; |
| 327 | for (i = 0; i < map->size && ret == -IPSET_ERR_LIST_FULL; i++) { |
| 328 | elem = list_set_elem(map, i); |
| 329 | if (elem->id == IPSET_INVALID_ID) |
| 330 | ret = before != 0 ? -IPSET_ERR_REF_EXIST |
| 331 | : list_set_add(map, i, id, timeout); |
| 332 | else if (elem->id != refid) |
| 333 | continue; |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 334 | else if (before > 0) |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 335 | ret = list_set_add(map, i, id, timeout); |
| 336 | else if (i + 1 < map->size) |
| 337 | ret = list_set_add(map, i + 1, id, timeout); |
| 338 | } |
| 339 | break; |
| 340 | case IPSET_DEL: |
| 341 | ret = -IPSET_ERR_EXIST; |
| 342 | for (i = 0; i < map->size && ret == -IPSET_ERR_EXIST; i++) { |
| 343 | elem = list_set_elem(map, i); |
| 344 | if (elem->id == IPSET_INVALID_ID) { |
| 345 | ret = before != 0 ? -IPSET_ERR_REF_EXIST |
| 346 | : -IPSET_ERR_EXIST; |
| 347 | break; |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 348 | } else if (elem->id == id && |
| 349 | (before == 0 || |
| 350 | (before > 0 && id_eq(map, i + 1, refid)))) |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 351 | ret = list_set_del(map, i); |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 352 | else if (elem->id == refid && |
| 353 | before < 0 && id_eq(map, i + 1, id)) |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 354 | ret = list_set_del(map, i + 1); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 355 | } |
| 356 | break; |
| 357 | default: |
| 358 | break; |
| 359 | } |
| 360 | |
| 361 | finish: |
| 362 | if (refid != IPSET_INVALID_ID) |
| 363 | ip_set_put_byindex(refid); |
| 364 | if (adt != IPSET_ADD || ret) |
| 365 | ip_set_put_byindex(id); |
| 366 | |
| 367 | return ip_set_eexist(ret, flags) ? 0 : ret; |
| 368 | } |
| 369 | |
| 370 | static void |
| 371 | list_set_flush(struct ip_set *set) |
| 372 | { |
| 373 | struct list_set *map = set->data; |
| 374 | struct set_elem *elem; |
| 375 | u32 i; |
| 376 | |
| 377 | for (i = 0; i < map->size; i++) { |
| 378 | elem = list_set_elem(map, i); |
| 379 | if (elem->id != IPSET_INVALID_ID) { |
| 380 | ip_set_put_byindex(elem->id); |
| 381 | elem->id = IPSET_INVALID_ID; |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | static void |
| 387 | list_set_destroy(struct ip_set *set) |
| 388 | { |
| 389 | struct list_set *map = set->data; |
| 390 | |
| 391 | if (with_timeout(map->timeout)) |
| 392 | del_timer_sync(&map->gc); |
| 393 | list_set_flush(set); |
| 394 | kfree(map); |
| 395 | |
| 396 | set->data = NULL; |
| 397 | } |
| 398 | |
| 399 | static int |
| 400 | list_set_head(struct ip_set *set, struct sk_buff *skb) |
| 401 | { |
| 402 | const struct list_set *map = set->data; |
| 403 | struct nlattr *nested; |
| 404 | |
| 405 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); |
| 406 | if (!nested) |
| 407 | goto nla_put_failure; |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 408 | if (nla_put_net32(skb, IPSET_ATTR_SIZE, htonl(map->size)) || |
| 409 | (with_timeout(map->timeout) && |
| 410 | nla_put_net32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout))) || |
| 411 | nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref - 1)) || |
| 412 | nla_put_net32(skb, IPSET_ATTR_MEMSIZE, |
| 413 | htonl(sizeof(*map) + map->size * map->dsize))) |
| 414 | goto nla_put_failure; |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 415 | ipset_nest_end(skb, nested); |
| 416 | |
| 417 | return 0; |
| 418 | nla_put_failure: |
| 419 | return -EMSGSIZE; |
| 420 | } |
| 421 | |
| 422 | static int |
| 423 | list_set_list(const struct ip_set *set, |
| 424 | struct sk_buff *skb, struct netlink_callback *cb) |
| 425 | { |
| 426 | const struct list_set *map = set->data; |
| 427 | struct nlattr *atd, *nested; |
| 428 | u32 i, first = cb->args[2]; |
| 429 | const struct set_elem *e; |
| 430 | |
| 431 | atd = ipset_nest_start(skb, IPSET_ATTR_ADT); |
| 432 | if (!atd) |
| 433 | return -EMSGSIZE; |
| 434 | for (; cb->args[2] < map->size; cb->args[2]++) { |
| 435 | i = cb->args[2]; |
| 436 | e = list_set_elem(map, i); |
| 437 | if (e->id == IPSET_INVALID_ID) |
| 438 | goto finish; |
| 439 | if (with_timeout(map->timeout) && list_set_expired(map, i)) |
| 440 | continue; |
| 441 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); |
| 442 | if (!nested) { |
| 443 | if (i == first) { |
| 444 | nla_nest_cancel(skb, atd); |
| 445 | return -EMSGSIZE; |
| 446 | } else |
| 447 | goto nla_put_failure; |
| 448 | } |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 449 | if (nla_put_string(skb, IPSET_ATTR_NAME, |
| 450 | ip_set_name_byindex(e->id))) |
| 451 | goto nla_put_failure; |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 452 | if (with_timeout(map->timeout)) { |
| 453 | const struct set_telem *te = |
| 454 | (const struct set_telem *) e; |
David S. Miller | 7cf7899 | 2012-04-01 19:54:46 -0400 | [diff] [blame] | 455 | __be32 to = htonl(ip_set_timeout_get(te->timeout)); |
| 456 | if (nla_put_net32(skb, IPSET_ATTR_TIMEOUT, to)) |
| 457 | goto nla_put_failure; |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 458 | } |
| 459 | ipset_nest_end(skb, nested); |
| 460 | } |
| 461 | finish: |
| 462 | ipset_nest_end(skb, atd); |
| 463 | /* Set listing finished */ |
| 464 | cb->args[2] = 0; |
| 465 | return 0; |
| 466 | |
| 467 | nla_put_failure: |
| 468 | nla_nest_cancel(skb, nested); |
| 469 | ipset_nest_end(skb, atd); |
| 470 | if (unlikely(i == first)) { |
| 471 | cb->args[2] = 0; |
| 472 | return -EMSGSIZE; |
| 473 | } |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | static bool |
| 478 | list_set_same_set(const struct ip_set *a, const struct ip_set *b) |
| 479 | { |
| 480 | const struct list_set *x = a->data; |
| 481 | const struct list_set *y = b->data; |
| 482 | |
| 483 | return x->size == y->size && |
| 484 | x->timeout == y->timeout; |
| 485 | } |
| 486 | |
| 487 | static const struct ip_set_type_variant list_set = { |
| 488 | .kadt = list_set_kadt, |
| 489 | .uadt = list_set_uadt, |
| 490 | .destroy = list_set_destroy, |
| 491 | .flush = list_set_flush, |
| 492 | .head = list_set_head, |
| 493 | .list = list_set_list, |
| 494 | .same_set = list_set_same_set, |
| 495 | }; |
| 496 | |
| 497 | static void |
| 498 | list_set_gc(unsigned long ul_set) |
| 499 | { |
| 500 | struct ip_set *set = (struct ip_set *) ul_set; |
| 501 | struct list_set *map = set->data; |
Jozsef Kadlecsik | 2f9f28b | 2011-04-04 15:19:25 +0200 | [diff] [blame] | 502 | |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 503 | write_lock_bh(&set->lock); |
Jozsef Kadlecsik | 5416219 | 2011-06-16 18:40:55 +0200 | [diff] [blame] | 504 | cleanup_entries(map); |
Jozsef Kadlecsik | 512d06b | 2011-04-04 15:18:45 +0200 | [diff] [blame] | 505 | write_unlock_bh(&set->lock); |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 506 | |
| 507 | map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; |
| 508 | add_timer(&map->gc); |
| 509 | } |
| 510 | |
| 511 | static void |
| 512 | list_set_gc_init(struct ip_set *set) |
| 513 | { |
| 514 | struct list_set *map = set->data; |
| 515 | |
| 516 | init_timer(&map->gc); |
| 517 | map->gc.data = (unsigned long) set; |
| 518 | map->gc.function = list_set_gc; |
| 519 | map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; |
| 520 | add_timer(&map->gc); |
| 521 | } |
| 522 | |
| 523 | /* Create list:set type of sets */ |
| 524 | |
| 525 | static bool |
| 526 | init_list_set(struct ip_set *set, u32 size, size_t dsize, |
| 527 | unsigned long timeout) |
| 528 | { |
| 529 | struct list_set *map; |
| 530 | struct set_elem *e; |
| 531 | u32 i; |
| 532 | |
| 533 | map = kzalloc(sizeof(*map) + size * dsize, GFP_KERNEL); |
| 534 | if (!map) |
| 535 | return false; |
| 536 | |
| 537 | map->size = size; |
| 538 | map->dsize = dsize; |
| 539 | map->timeout = timeout; |
| 540 | set->data = map; |
| 541 | |
| 542 | for (i = 0; i < size; i++) { |
| 543 | e = list_set_elem(map, i); |
| 544 | e->id = IPSET_INVALID_ID; |
| 545 | } |
| 546 | |
| 547 | return true; |
| 548 | } |
| 549 | |
| 550 | static int |
| 551 | list_set_create(struct ip_set *set, struct nlattr *tb[], u32 flags) |
| 552 | { |
| 553 | u32 size = IP_SET_LIST_DEFAULT_SIZE; |
| 554 | |
| 555 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_SIZE) || |
| 556 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) |
| 557 | return -IPSET_ERR_PROTOCOL; |
| 558 | |
| 559 | if (tb[IPSET_ATTR_SIZE]) |
| 560 | size = ip_set_get_h32(tb[IPSET_ATTR_SIZE]); |
| 561 | if (size < IP_SET_LIST_MIN_SIZE) |
| 562 | size = IP_SET_LIST_MIN_SIZE; |
| 563 | |
| 564 | if (tb[IPSET_ATTR_TIMEOUT]) { |
| 565 | if (!init_list_set(set, size, sizeof(struct set_telem), |
| 566 | ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]))) |
| 567 | return -ENOMEM; |
| 568 | |
| 569 | list_set_gc_init(set); |
| 570 | } else { |
| 571 | if (!init_list_set(set, size, sizeof(struct set_elem), |
| 572 | IPSET_NO_TIMEOUT)) |
| 573 | return -ENOMEM; |
| 574 | } |
| 575 | set->variant = &list_set; |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static struct ip_set_type list_set_type __read_mostly = { |
| 580 | .name = "list:set", |
| 581 | .protocol = IPSET_PROTOCOL, |
| 582 | .features = IPSET_TYPE_NAME | IPSET_DUMP_LAST, |
| 583 | .dimension = IPSET_DIM_ONE, |
Jan Engelhardt | c15f1c8 | 2012-02-14 00:24:10 +0100 | [diff] [blame] | 584 | .family = NFPROTO_UNSPEC, |
Jozsef Kadlecsik | 10111a6 | 2012-09-21 21:59:32 +0200 | [diff] [blame] | 585 | .revision_min = REVISION_MIN, |
| 586 | .revision_max = REVISION_MAX, |
Jozsef Kadlecsik | f830837 | 2011-02-01 15:54:59 +0100 | [diff] [blame] | 587 | .create = list_set_create, |
| 588 | .create_policy = { |
| 589 | [IPSET_ATTR_SIZE] = { .type = NLA_U32 }, |
| 590 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 591 | }, |
| 592 | .adt_policy = { |
| 593 | [IPSET_ATTR_NAME] = { .type = NLA_STRING, |
| 594 | .len = IPSET_MAXNAMELEN }, |
| 595 | [IPSET_ATTR_NAMEREF] = { .type = NLA_STRING, |
| 596 | .len = IPSET_MAXNAMELEN }, |
| 597 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, |
| 598 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, |
| 599 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, |
| 600 | }, |
| 601 | .me = THIS_MODULE, |
| 602 | }; |
| 603 | |
| 604 | static int __init |
| 605 | list_set_init(void) |
| 606 | { |
| 607 | return ip_set_type_register(&list_set_type); |
| 608 | } |
| 609 | |
| 610 | static void __exit |
| 611 | list_set_fini(void) |
| 612 | { |
| 613 | ip_set_type_unregister(&list_set_type); |
| 614 | } |
| 615 | |
| 616 | module_init(list_set_init); |
| 617 | module_exit(list_set_fini); |