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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7d47d972 | 2 | /* Copyright (C) 2008-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
f830837f JK |
3 | */ |
4 | ||
5 | /* Kernel module implementing an IP set type: the list:set type */ | |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/ip.h> | |
00590fdd | 9 | #include <linux/rculist.h> |
f830837f JK |
10 | #include <linux/skbuff.h> |
11 | #include <linux/errno.h> | |
12 | ||
13 | #include <linux/netfilter/ipset/ip_set.h> | |
f830837f JK |
14 | #include <linux/netfilter/ipset/ip_set_list.h> |
15 | ||
35b8dcf8 | 16 | #define IPSET_TYPE_REV_MIN 0 |
81b10bb4 | 17 | /* 1 Counters support added */ |
cbee93d7 AD |
18 | /* 2 Comments support added */ |
19 | #define IPSET_TYPE_REV_MAX 3 /* skbinfo support added */ | |
10111a6e | 20 | |
f830837f JK |
21 | MODULE_LICENSE("GPL"); |
22 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); | |
35b8dcf8 | 23 | IP_SET_MODULE_DESC("list:set", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX); |
f830837f JK |
24 | MODULE_ALIAS("ip_set_list:set"); |
25 | ||
7d47d972 | 26 | /* Member elements */ |
f830837f | 27 | struct set_elem { |
00590fdd JK |
28 | struct rcu_head rcu; |
29 | struct list_head list; | |
45040978 | 30 | struct ip_set *set; /* Sigh, in order to cleanup reference */ |
f830837f | 31 | ip_set_id_t id; |
95ad1f4a | 32 | } __aligned(__alignof__(u64)); |
f830837f | 33 | |
7d47d972 JK |
34 | struct set_adt_elem { |
35 | ip_set_id_t id; | |
36 | ip_set_id_t refid; | |
37 | int before; | |
38 | }; | |
39 | ||
f830837f JK |
40 | /* Type structure */ |
41 | struct list_set { | |
f830837f | 42 | u32 size; /* size of set list array */ |
f830837f | 43 | struct timer_list gc; /* garbage collection */ |
a92c5751 | 44 | struct ip_set *set; /* attached to this ip_set */ |
1785e8f4 | 45 | struct net *net; /* namespace */ |
00590fdd | 46 | struct list_head members; /* the set members */ |
f830837f JK |
47 | }; |
48 | ||
7d47d972 JK |
49 | static int |
50 | list_set_ktest(struct ip_set *set, const struct sk_buff *skb, | |
51 | const struct xt_action_param *par, | |
52 | struct ip_set_adt_opt *opt, const struct ip_set_ext *ext) | |
f830837f | 53 | { |
7d47d972 | 54 | struct list_set *map = set->data; |
4750005a | 55 | struct ip_set_ext *mext = &opt->ext; |
7d47d972 | 56 | struct set_elem *e; |
4750005a | 57 | u32 flags = opt->cmdflags; |
7d47d972 | 58 | int ret; |
f830837f | 59 | |
6e01781d JK |
60 | /* Don't lookup sub-counters at all */ |
61 | opt->cmdflags &= ~IPSET_FLAG_MATCH_COUNTERS; | |
62 | if (opt->cmdflags & IPSET_FLAG_SKIP_SUBCOUNTER_UPDATE) | |
63 | opt->cmdflags &= ~IPSET_FLAG_SKIP_COUNTER_UPDATE; | |
00590fdd | 64 | list_for_each_entry_rcu(e, &map->members, list) { |
7d47d972 | 65 | ret = ip_set_test(e->id, skb, par, opt); |
4750005a JK |
66 | if (ret <= 0) |
67 | continue; | |
68 | if (ip_set_match_extensions(set, ext, mext, flags, e)) | |
69 | return 1; | |
7d47d972 JK |
70 | } |
71 | return 0; | |
f830837f JK |
72 | } |
73 | ||
7d47d972 JK |
74 | static int |
75 | list_set_kadd(struct ip_set *set, const struct sk_buff *skb, | |
76 | const struct xt_action_param *par, | |
77 | struct ip_set_adt_opt *opt, const struct ip_set_ext *ext) | |
f830837f | 78 | { |
7d47d972 JK |
79 | struct list_set *map = set->data; |
80 | struct set_elem *e; | |
7d47d972 | 81 | int ret; |
f830837f | 82 | |
00590fdd | 83 | list_for_each_entry(e, &map->members, list) { |
7d47d972 | 84 | if (SET_WITH_TIMEOUT(set) && |
ca134ce8 | 85 | ip_set_timeout_expired(ext_timeout(e, set))) |
7d47d972 JK |
86 | continue; |
87 | ret = ip_set_add(e->id, skb, par, opt); | |
88 | if (ret == 0) | |
89 | return ret; | |
90 | } | |
91 | return 0; | |
f830837f JK |
92 | } |
93 | ||
f830837f | 94 | static int |
7d47d972 | 95 | list_set_kdel(struct ip_set *set, const struct sk_buff *skb, |
b66554cf | 96 | const struct xt_action_param *par, |
7d47d972 | 97 | struct ip_set_adt_opt *opt, const struct ip_set_ext *ext) |
f830837f JK |
98 | { |
99 | struct list_set *map = set->data; | |
7d47d972 | 100 | struct set_elem *e; |
f830837f JK |
101 | int ret; |
102 | ||
00590fdd | 103 | list_for_each_entry(e, &map->members, list) { |
7d47d972 | 104 | if (SET_WITH_TIMEOUT(set) && |
ca134ce8 | 105 | ip_set_timeout_expired(ext_timeout(e, set))) |
f830837f | 106 | continue; |
7d47d972 JK |
107 | ret = ip_set_del(e->id, skb, par, opt); |
108 | if (ret == 0) | |
109 | return ret; | |
110 | } | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static int | |
115 | list_set_kadt(struct ip_set *set, const struct sk_buff *skb, | |
116 | const struct xt_action_param *par, | |
117 | enum ipset_adt adt, struct ip_set_adt_opt *opt) | |
118 | { | |
ca134ce8 | 119 | struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); |
00590fdd | 120 | int ret = -EINVAL; |
7d47d972 | 121 | |
00590fdd | 122 | rcu_read_lock(); |
7d47d972 JK |
123 | switch (adt) { |
124 | case IPSET_TEST: | |
00590fdd JK |
125 | ret = list_set_ktest(set, skb, par, opt, &ext); |
126 | break; | |
7d47d972 | 127 | case IPSET_ADD: |
00590fdd JK |
128 | ret = list_set_kadd(set, skb, par, opt, &ext); |
129 | break; | |
7d47d972 | 130 | case IPSET_DEL: |
00590fdd JK |
131 | ret = list_set_kdel(set, skb, par, opt, &ext); |
132 | break; | |
7d47d972 JK |
133 | default: |
134 | break; | |
f830837f | 135 | } |
00590fdd | 136 | rcu_read_unlock(); |
f830837f | 137 | |
00590fdd | 138 | return ret; |
7d47d972 JK |
139 | } |
140 | ||
00590fdd | 141 | /* Userspace interfaces: we are protected by the nfnl mutex */ |
5416219e | 142 | |
00590fdd | 143 | static void |
45040978 | 144 | __list_set_del_rcu(struct rcu_head * rcu) |
5416219e | 145 | { |
45040978 JK |
146 | struct set_elem *e = container_of(rcu, struct set_elem, rcu); |
147 | struct ip_set *set = e->set; | |
5416219e | 148 | |
40cd63bf | 149 | ip_set_ext_destroy(set, e); |
45040978 | 150 | kfree(e); |
00590fdd | 151 | } |
f830837f | 152 | |
00590fdd JK |
153 | static inline void |
154 | list_set_del(struct ip_set *set, struct set_elem *e) | |
155 | { | |
439cd39e SB |
156 | struct list_set *map = set->data; |
157 | ||
702b71e7 | 158 | set->elements--; |
00590fdd | 159 | list_del_rcu(&e->list); |
439cd39e | 160 | ip_set_put_byindex(map->net, e->id); |
45040978 | 161 | call_rcu(&e->rcu, __list_set_del_rcu); |
00590fdd | 162 | } |
7d47d972 | 163 | |
00590fdd | 164 | static inline void |
439cd39e | 165 | list_set_replace(struct ip_set *set, struct set_elem *e, struct set_elem *old) |
00590fdd | 166 | { |
439cd39e SB |
167 | struct list_set *map = set->data; |
168 | ||
00590fdd | 169 | list_replace_rcu(&old->list, &e->list); |
439cd39e | 170 | ip_set_put_byindex(map->net, old->id); |
45040978 | 171 | call_rcu(&old->rcu, __list_set_del_rcu); |
f830837f JK |
172 | } |
173 | ||
174 | static void | |
7d47d972 | 175 | set_cleanup_entries(struct ip_set *set) |
f830837f | 176 | { |
7d47d972 | 177 | struct list_set *map = set->data; |
00590fdd | 178 | struct set_elem *e, *n; |
f830837f | 179 | |
00590fdd JK |
180 | list_for_each_entry_safe(e, n, &map->members, list) |
181 | if (ip_set_timeout_expired(ext_timeout(e, set))) | |
182 | list_set_del(set, e); | |
f830837f JK |
183 | } |
184 | ||
7d47d972 JK |
185 | static int |
186 | list_set_utest(struct ip_set *set, void *value, const struct ip_set_ext *ext, | |
187 | struct ip_set_ext *mext, u32 flags) | |
f830837f | 188 | { |
7d47d972 JK |
189 | struct list_set *map = set->data; |
190 | struct set_adt_elem *d = value; | |
00590fdd | 191 | struct set_elem *e, *next, *prev = NULL; |
7d47d972 | 192 | int ret; |
f830837f | 193 | |
00590fdd JK |
194 | list_for_each_entry(e, &map->members, list) { |
195 | if (SET_WITH_TIMEOUT(set) && | |
196 | ip_set_timeout_expired(ext_timeout(e, set))) | |
7d47d972 | 197 | continue; |
00590fdd JK |
198 | else if (e->id != d->id) { |
199 | prev = e; | |
7d47d972 | 200 | continue; |
00590fdd | 201 | } |
7d47d972 | 202 | |
ca0f6a5c | 203 | if (d->before == 0) { |
00590fdd | 204 | ret = 1; |
ca0f6a5c | 205 | } else if (d->before > 0) { |
00590fdd JK |
206 | next = list_next_entry(e, list); |
207 | ret = !list_is_last(&e->list, &map->members) && | |
208 | next->id == d->refid; | |
ca0f6a5c | 209 | } else { |
00590fdd | 210 | ret = prev && prev->id == d->refid; |
ca0f6a5c | 211 | } |
7d47d972 | 212 | return ret; |
f830837f | 213 | } |
7d47d972 | 214 | return 0; |
f830837f JK |
215 | } |
216 | ||
00590fdd JK |
217 | static void |
218 | list_set_init_extensions(struct ip_set *set, const struct ip_set_ext *ext, | |
219 | struct set_elem *e) | |
220 | { | |
221 | if (SET_WITH_COUNTER(set)) | |
222 | ip_set_init_counter(ext_counter(e, set), ext); | |
223 | if (SET_WITH_COMMENT(set)) | |
9e41f26a | 224 | ip_set_init_comment(set, ext_comment(e, set), ext); |
00590fdd JK |
225 | if (SET_WITH_SKBINFO(set)) |
226 | ip_set_init_skbinfo(ext_skbinfo(e, set), ext); | |
227 | /* Update timeout last */ | |
228 | if (SET_WITH_TIMEOUT(set)) | |
229 | ip_set_timeout_set(ext_timeout(e, set), ext->timeout); | |
230 | } | |
7d47d972 | 231 | |
f830837f | 232 | static int |
7d47d972 JK |
233 | list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext, |
234 | struct ip_set_ext *mext, u32 flags) | |
f830837f | 235 | { |
7d47d972 JK |
236 | struct list_set *map = set->data; |
237 | struct set_adt_elem *d = value; | |
00590fdd | 238 | struct set_elem *e, *n, *prev, *next; |
7d47d972 | 239 | bool flag_exist = flags & IPSET_FLAG_EXIST; |
f830837f | 240 | |
00590fdd JK |
241 | /* Find where to add the new entry */ |
242 | n = prev = next = NULL; | |
243 | list_for_each_entry(e, &map->members, list) { | |
244 | if (SET_WITH_TIMEOUT(set) && | |
245 | ip_set_timeout_expired(ext_timeout(e, set))) | |
7d47d972 | 246 | continue; |
00590fdd JK |
247 | else if (d->id == e->id) |
248 | n = e; | |
249 | else if (d->before == 0 || e->id != d->refid) | |
250 | continue; | |
251 | else if (d->before > 0) | |
252 | next = e; | |
253 | else | |
254 | prev = e; | |
255 | } | |
40b446a1 VP |
256 | |
257 | /* If before/after is used on an empty set */ | |
258 | if ((d->before > 0 && !next) || | |
259 | (d->before < 0 && !prev)) | |
260 | return -IPSET_ERR_REF_EXIST; | |
261 | ||
00590fdd JK |
262 | /* Re-add already existing element */ |
263 | if (n) { | |
7d47d972 | 264 | if (!flag_exist) |
7d47d972 JK |
265 | return -IPSET_ERR_EXIST; |
266 | /* Update extensions */ | |
00590fdd JK |
267 | ip_set_ext_destroy(set, n); |
268 | list_set_init_extensions(set, ext, n); | |
40cd63bf | 269 | |
7d47d972 | 270 | /* Set is already added to the list */ |
1785e8f4 | 271 | ip_set_put_byindex(map->net, d->id); |
7d47d972 JK |
272 | return 0; |
273 | } | |
00590fdd JK |
274 | /* Add new entry */ |
275 | if (d->before == 0) { | |
276 | /* Append */ | |
277 | n = list_empty(&map->members) ? NULL : | |
278 | list_last_entry(&map->members, struct set_elem, list); | |
279 | } else if (d->before > 0) { | |
280 | /* Insert after next element */ | |
281 | if (!list_is_last(&next->list, &map->members)) | |
282 | n = list_next_entry(next, list); | |
283 | } else { | |
284 | /* Insert before prev element */ | |
285 | if (prev->list.prev != &map->members) | |
286 | n = list_prev_entry(prev, list); | |
02f815cb | 287 | } |
00590fdd JK |
288 | /* Can we replace a timed out entry? */ |
289 | if (n && | |
290 | !(SET_WITH_TIMEOUT(set) && | |
291 | ip_set_timeout_expired(ext_timeout(n, set)))) | |
292 | n = NULL; | |
293 | ||
00db674b | 294 | e = kzalloc(set->dsize, GFP_ATOMIC); |
00590fdd JK |
295 | if (!e) |
296 | return -ENOMEM; | |
297 | e->id = d->id; | |
45040978 | 298 | e->set = set; |
00590fdd JK |
299 | INIT_LIST_HEAD(&e->list); |
300 | list_set_init_extensions(set, ext, e); | |
301 | if (n) | |
439cd39e | 302 | list_set_replace(set, e, n); |
00590fdd JK |
303 | else if (next) |
304 | list_add_tail_rcu(&e->list, &next->list); | |
305 | else if (prev) | |
306 | list_add_rcu(&e->list, &prev->list); | |
307 | else | |
308 | list_add_tail_rcu(&e->list, &map->members); | |
702b71e7 | 309 | set->elements++; |
f830837f | 310 | |
00590fdd | 311 | return 0; |
f830837f JK |
312 | } |
313 | ||
314 | static int | |
7d47d972 JK |
315 | list_set_udel(struct ip_set *set, void *value, const struct ip_set_ext *ext, |
316 | struct ip_set_ext *mext, u32 flags) | |
f830837f | 317 | { |
7d47d972 JK |
318 | struct list_set *map = set->data; |
319 | struct set_adt_elem *d = value; | |
00590fdd JK |
320 | struct set_elem *e, *next, *prev = NULL; |
321 | ||
322 | list_for_each_entry(e, &map->members, list) { | |
323 | if (SET_WITH_TIMEOUT(set) && | |
324 | ip_set_timeout_expired(ext_timeout(e, set))) | |
7d47d972 | 325 | continue; |
00590fdd JK |
326 | else if (e->id != d->id) { |
327 | prev = e; | |
7d47d972 | 328 | continue; |
00590fdd | 329 | } |
7d47d972 | 330 | |
00590fdd JK |
331 | if (d->before > 0) { |
332 | next = list_next_entry(e, list); | |
333 | if (list_is_last(&e->list, &map->members) || | |
334 | next->id != d->refid) | |
7d47d972 | 335 | return -IPSET_ERR_REF_EXIST; |
00590fdd JK |
336 | } else if (d->before < 0) { |
337 | if (!prev || prev->id != d->refid) | |
338 | return -IPSET_ERR_REF_EXIST; | |
339 | } | |
340 | list_set_del(set, e); | |
341 | return 0; | |
5416219e | 342 | } |
00590fdd | 343 | return d->before != 0 ? -IPSET_ERR_REF_EXIST : -IPSET_ERR_EXIST; |
5416219e JK |
344 | } |
345 | ||
f830837f JK |
346 | static int |
347 | list_set_uadt(struct ip_set *set, struct nlattr *tb[], | |
3d14b171 | 348 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
f830837f | 349 | { |
1785e8f4 | 350 | struct list_set *map = set->data; |
7d47d972 JK |
351 | ipset_adtfn adtfn = set->variant->adt[adt]; |
352 | struct set_adt_elem e = { .refid = IPSET_INVALID_ID }; | |
ca134ce8 | 353 | struct ip_set_ext ext = IP_SET_INIT_UEXT(set); |
f830837f | 354 | struct ip_set *s; |
f830837f JK |
355 | int ret = 0; |
356 | ||
a212e08e SP |
357 | if (tb[IPSET_ATTR_LINENO]) |
358 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); | |
359 | ||
f830837f | 360 | if (unlikely(!tb[IPSET_ATTR_NAME] || |
7dd37bc8 | 361 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) |
f830837f JK |
362 | return -IPSET_ERR_PROTOCOL; |
363 | ||
7d47d972 JK |
364 | ret = ip_set_get_extensions(set, tb, &ext); |
365 | if (ret) | |
366 | return ret; | |
1785e8f4 | 367 | e.id = ip_set_get_byname(map->net, nla_data(tb[IPSET_ATTR_NAME]), &s); |
7d47d972 | 368 | if (e.id == IPSET_INVALID_ID) |
f830837f JK |
369 | return -IPSET_ERR_NAME; |
370 | /* "Loop detection" */ | |
371 | if (s->type->features & IPSET_TYPE_NAME) { | |
372 | ret = -IPSET_ERR_LOOP; | |
373 | goto finish; | |
374 | } | |
375 | ||
376 | if (tb[IPSET_ATTR_CADT_FLAGS]) { | |
377 | u32 f = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); | |
00590fdd | 378 | |
7d47d972 | 379 | e.before = f & IPSET_FLAG_BEFORE; |
f830837f JK |
380 | } |
381 | ||
7d47d972 | 382 | if (e.before && !tb[IPSET_ATTR_NAMEREF]) { |
f830837f JK |
383 | ret = -IPSET_ERR_BEFORE; |
384 | goto finish; | |
385 | } | |
386 | ||
387 | if (tb[IPSET_ATTR_NAMEREF]) { | |
1785e8f4 VL |
388 | e.refid = ip_set_get_byname(map->net, |
389 | nla_data(tb[IPSET_ATTR_NAMEREF]), | |
7d47d972 JK |
390 | &s); |
391 | if (e.refid == IPSET_INVALID_ID) { | |
f830837f JK |
392 | ret = -IPSET_ERR_NAMEREF; |
393 | goto finish; | |
394 | } | |
7d47d972 JK |
395 | if (!e.before) |
396 | e.before = -1; | |
f830837f | 397 | } |
7d47d972 JK |
398 | if (adt != IPSET_TEST && SET_WITH_TIMEOUT(set)) |
399 | set_cleanup_entries(set); | |
f830837f | 400 | |
7d47d972 | 401 | ret = adtfn(set, &e, &ext, &ext, flags); |
f830837f JK |
402 | |
403 | finish: | |
7d47d972 | 404 | if (e.refid != IPSET_INVALID_ID) |
1785e8f4 | 405 | ip_set_put_byindex(map->net, e.refid); |
f830837f | 406 | if (adt != IPSET_ADD || ret) |
1785e8f4 | 407 | ip_set_put_byindex(map->net, e.id); |
f830837f JK |
408 | |
409 | return ip_set_eexist(ret, flags) ? 0 : ret; | |
410 | } | |
411 | ||
412 | static void | |
413 | list_set_flush(struct ip_set *set) | |
414 | { | |
415 | struct list_set *map = set->data; | |
00590fdd JK |
416 | struct set_elem *e, *n; |
417 | ||
418 | list_for_each_entry_safe(e, n, &map->members, list) | |
419 | list_set_del(set, e); | |
702b71e7 | 420 | set->elements = 0; |
9e41f26a | 421 | set->ext_size = 0; |
f830837f JK |
422 | } |
423 | ||
424 | static void | |
425 | list_set_destroy(struct ip_set *set) | |
426 | { | |
427 | struct list_set *map = set->data; | |
00590fdd | 428 | struct set_elem *e, *n; |
f830837f | 429 | |
7d47d972 | 430 | if (SET_WITH_TIMEOUT(set)) |
f830837f | 431 | del_timer_sync(&map->gc); |
45040978 | 432 | |
00590fdd JK |
433 | list_for_each_entry_safe(e, n, &map->members, list) { |
434 | list_del(&e->list); | |
435 | ip_set_put_byindex(map->net, e->id); | |
436 | ip_set_ext_destroy(set, e); | |
437 | kfree(e); | |
438 | } | |
f830837f JK |
439 | kfree(map); |
440 | ||
441 | set->data = NULL; | |
442 | } | |
443 | ||
722a9451 JK |
444 | /* Calculate the actual memory size of the set data */ |
445 | static size_t | |
446 | list_set_memsize(const struct list_set *map, size_t dsize) | |
f830837f | 447 | { |
00590fdd JK |
448 | struct set_elem *e; |
449 | u32 n = 0; | |
450 | ||
45040978 JK |
451 | rcu_read_lock(); |
452 | list_for_each_entry_rcu(e, &map->members, list) | |
00590fdd | 453 | n++; |
45040978 | 454 | rcu_read_unlock(); |
f830837f | 455 | |
522e89d6 | 456 | return (sizeof(*map) + n * dsize); |
722a9451 JK |
457 | } |
458 | ||
459 | static int | |
460 | list_set_head(struct ip_set *set, struct sk_buff *skb) | |
461 | { | |
462 | const struct list_set *map = set->data; | |
463 | struct nlattr *nested; | |
9e41f26a | 464 | size_t memsize = list_set_memsize(map, set->dsize) + set->ext_size; |
722a9451 | 465 | |
12ad5f65 | 466 | nested = nla_nest_start(skb, IPSET_ATTR_DATA); |
f830837f JK |
467 | if (!nested) |
468 | goto nla_put_failure; | |
7cf7899d | 469 | if (nla_put_net32(skb, IPSET_ATTR_SIZE, htonl(map->size)) || |
596cf3fe | 470 | nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) || |
702b71e7 JK |
471 | nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) || |
472 | nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(set->elements))) | |
7cf7899d | 473 | goto nla_put_failure; |
81b10bb4 OS |
474 | if (unlikely(ip_set_put_flags(skb, set))) |
475 | goto nla_put_failure; | |
12ad5f65 | 476 | nla_nest_end(skb, nested); |
f830837f JK |
477 | |
478 | return 0; | |
479 | nla_put_failure: | |
480 | return -EMSGSIZE; | |
481 | } | |
482 | ||
483 | static int | |
484 | list_set_list(const struct ip_set *set, | |
485 | struct sk_buff *skb, struct netlink_callback *cb) | |
486 | { | |
487 | const struct list_set *map = set->data; | |
488 | struct nlattr *atd, *nested; | |
00590fdd | 489 | u32 i = 0, first = cb->args[IPSET_CB_ARG0]; |
439cd39e | 490 | char name[IPSET_MAXNAMELEN]; |
00590fdd JK |
491 | struct set_elem *e; |
492 | int ret = 0; | |
f830837f | 493 | |
12ad5f65 | 494 | atd = nla_nest_start(skb, IPSET_ATTR_ADT); |
f830837f JK |
495 | if (!atd) |
496 | return -EMSGSIZE; | |
00590fdd JK |
497 | |
498 | rcu_read_lock(); | |
45040978 JK |
499 | list_for_each_entry_rcu(e, &map->members, list) { |
500 | if (i < first || | |
501 | (SET_WITH_TIMEOUT(set) && | |
502 | ip_set_timeout_expired(ext_timeout(e, set)))) { | |
503 | i++; | |
f830837f | 504 | continue; |
45040978 | 505 | } |
12ad5f65 | 506 | nested = nla_nest_start(skb, IPSET_ATTR_DATA); |
45040978 | 507 | if (!nested) |
00590fdd | 508 | goto nla_put_failure; |
439cd39e SB |
509 | ip_set_name_byindex(map->net, e->id, name); |
510 | if (nla_put_string(skb, IPSET_ATTR_NAME, name)) | |
7cf7899d | 511 | goto nla_put_failure; |
3fd986b3 | 512 | if (ip_set_put_extensions(skb, set, e, true)) |
81b10bb4 | 513 | goto nla_put_failure; |
12ad5f65 | 514 | nla_nest_end(skb, nested); |
45040978 | 515 | i++; |
f830837f | 516 | } |
00590fdd | 517 | |
12ad5f65 | 518 | nla_nest_end(skb, atd); |
f830837f | 519 | /* Set listing finished */ |
93302880 | 520 | cb->args[IPSET_CB_ARG0] = 0; |
00590fdd | 521 | goto out; |
f830837f JK |
522 | |
523 | nla_put_failure: | |
524 | nla_nest_cancel(skb, nested); | |
f830837f | 525 | if (unlikely(i == first)) { |
45040978 | 526 | nla_nest_cancel(skb, atd); |
93302880 | 527 | cb->args[IPSET_CB_ARG0] = 0; |
00590fdd | 528 | ret = -EMSGSIZE; |
45040978 JK |
529 | } else { |
530 | cb->args[IPSET_CB_ARG0] = i; | |
12ad5f65 | 531 | nla_nest_end(skb, atd); |
f830837f | 532 | } |
00590fdd JK |
533 | out: |
534 | rcu_read_unlock(); | |
535 | return ret; | |
f830837f JK |
536 | } |
537 | ||
538 | static bool | |
539 | list_set_same_set(const struct ip_set *a, const struct ip_set *b) | |
540 | { | |
541 | const struct list_set *x = a->data; | |
542 | const struct list_set *y = b->data; | |
543 | ||
544 | return x->size == y->size && | |
ca134ce8 | 545 | a->timeout == b->timeout && |
7d47d972 | 546 | a->extensions == b->extensions; |
f830837f JK |
547 | } |
548 | ||
7d47d972 | 549 | static const struct ip_set_type_variant set_variant = { |
f830837f JK |
550 | .kadt = list_set_kadt, |
551 | .uadt = list_set_uadt, | |
7d47d972 JK |
552 | .adt = { |
553 | [IPSET_ADD] = list_set_uadd, | |
554 | [IPSET_DEL] = list_set_udel, | |
555 | [IPSET_TEST] = list_set_utest, | |
556 | }, | |
f830837f JK |
557 | .destroy = list_set_destroy, |
558 | .flush = list_set_flush, | |
559 | .head = list_set_head, | |
560 | .list = list_set_list, | |
561 | .same_set = list_set_same_set, | |
562 | }; | |
563 | ||
564 | static void | |
a92c5751 | 565 | list_set_gc(struct timer_list *t) |
f830837f | 566 | { |
a92c5751 KC |
567 | struct list_set *map = from_timer(map, t, gc); |
568 | struct ip_set *set = map->set; | |
2f9f28b2 | 569 | |
00590fdd | 570 | spin_lock_bh(&set->lock); |
7d47d972 | 571 | set_cleanup_entries(set); |
00590fdd | 572 | spin_unlock_bh(&set->lock); |
f830837f | 573 | |
ca134ce8 | 574 | map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ; |
f830837f JK |
575 | add_timer(&map->gc); |
576 | } | |
577 | ||
578 | static void | |
a92c5751 | 579 | list_set_gc_init(struct ip_set *set, void (*gc)(struct timer_list *t)) |
f830837f JK |
580 | { |
581 | struct list_set *map = set->data; | |
582 | ||
a92c5751 | 583 | timer_setup(&map->gc, gc, 0); |
fcb58a03 | 584 | mod_timer(&map->gc, jiffies + IPSET_GC_PERIOD(set->timeout) * HZ); |
f830837f JK |
585 | } |
586 | ||
587 | /* Create list:set type of sets */ | |
588 | ||
03c8b234 | 589 | static bool |
1785e8f4 | 590 | init_list_set(struct net *net, struct ip_set *set, u32 size) |
f830837f JK |
591 | { |
592 | struct list_set *map; | |
f830837f | 593 | |
00590fdd | 594 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
f830837f | 595 | if (!map) |
03c8b234 | 596 | return false; |
f830837f JK |
597 | |
598 | map->size = size; | |
1785e8f4 | 599 | map->net = net; |
a92c5751 | 600 | map->set = set; |
00590fdd | 601 | INIT_LIST_HEAD(&map->members); |
f830837f JK |
602 | set->data = map; |
603 | ||
03c8b234 | 604 | return true; |
f830837f JK |
605 | } |
606 | ||
607 | static int | |
1785e8f4 VL |
608 | list_set_create(struct net *net, struct ip_set *set, struct nlattr *tb[], |
609 | u32 flags) | |
f830837f | 610 | { |
03c8b234 | 611 | u32 size = IP_SET_LIST_DEFAULT_SIZE; |
f830837f JK |
612 | |
613 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_SIZE) || | |
de76303c JK |
614 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
615 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) | |
f830837f JK |
616 | return -IPSET_ERR_PROTOCOL; |
617 | ||
618 | if (tb[IPSET_ATTR_SIZE]) | |
619 | size = ip_set_get_h32(tb[IPSET_ATTR_SIZE]); | |
620 | if (size < IP_SET_LIST_MIN_SIZE) | |
621 | size = IP_SET_LIST_MIN_SIZE; | |
622 | ||
7d47d972 | 623 | set->variant = &set_variant; |
95ad1f4a JK |
624 | set->dsize = ip_set_elem_len(set, tb, sizeof(struct set_elem), |
625 | __alignof__(struct set_elem)); | |
1785e8f4 | 626 | if (!init_list_set(net, set, size)) |
03c8b234 JK |
627 | return -ENOMEM; |
628 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
629 | set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
7d47d972 | 630 | list_set_gc_init(set, list_set_gc); |
f830837f | 631 | } |
f830837f JK |
632 | return 0; |
633 | } | |
634 | ||
635 | static struct ip_set_type list_set_type __read_mostly = { | |
636 | .name = "list:set", | |
637 | .protocol = IPSET_PROTOCOL, | |
638 | .features = IPSET_TYPE_NAME | IPSET_DUMP_LAST, | |
639 | .dimension = IPSET_DIM_ONE, | |
c15f1c83 | 640 | .family = NFPROTO_UNSPEC, |
35b8dcf8 JK |
641 | .revision_min = IPSET_TYPE_REV_MIN, |
642 | .revision_max = IPSET_TYPE_REV_MAX, | |
f830837f JK |
643 | .create = list_set_create, |
644 | .create_policy = { | |
645 | [IPSET_ATTR_SIZE] = { .type = NLA_U32 }, | |
646 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
de76303c | 647 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, |
f830837f JK |
648 | }, |
649 | .adt_policy = { | |
650 | [IPSET_ATTR_NAME] = { .type = NLA_STRING, | |
651 | .len = IPSET_MAXNAMELEN }, | |
652 | [IPSET_ATTR_NAMEREF] = { .type = NLA_STRING, | |
653 | .len = IPSET_MAXNAMELEN }, | |
654 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
655 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, | |
656 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, | |
de76303c JK |
657 | [IPSET_ATTR_BYTES] = { .type = NLA_U64 }, |
658 | [IPSET_ATTR_PACKETS] = { .type = NLA_U64 }, | |
03726186 SP |
659 | [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING, |
660 | .len = IPSET_MAX_COMMENT_SIZE }, | |
cbee93d7 AD |
661 | [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 }, |
662 | [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 }, | |
663 | [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 }, | |
f830837f JK |
664 | }, |
665 | .me = THIS_MODULE, | |
666 | }; | |
667 | ||
668 | static int __init | |
669 | list_set_init(void) | |
670 | { | |
671 | return ip_set_type_register(&list_set_type); | |
672 | } | |
673 | ||
674 | static void __exit | |
675 | list_set_fini(void) | |
676 | { | |
00590fdd | 677 | rcu_barrier(); |
f830837f JK |
678 | ip_set_type_unregister(&list_set_type); |
679 | } | |
680 | ||
681 | module_init(list_set_init); | |
682 | module_exit(list_set_fini); |