Commit | Line | Data |
---|---|---|
7d47d972 | 1 | /* Copyright (C) 2008-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
f830837f JK |
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> | |
00590fdd | 12 | #include <linux/rculist.h> |
f830837f JK |
13 | #include <linux/skbuff.h> |
14 | #include <linux/errno.h> | |
15 | ||
16 | #include <linux/netfilter/ipset/ip_set.h> | |
f830837f JK |
17 | #include <linux/netfilter/ipset/ip_set_list.h> |
18 | ||
35b8dcf8 | 19 | #define IPSET_TYPE_REV_MIN 0 |
81b10bb4 | 20 | /* 1 Counters support added */ |
cbee93d7 AD |
21 | /* 2 Comments support added */ |
22 | #define IPSET_TYPE_REV_MAX 3 /* skbinfo support added */ | |
10111a6e | 23 | |
f830837f JK |
24 | MODULE_LICENSE("GPL"); |
25 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); | |
35b8dcf8 | 26 | IP_SET_MODULE_DESC("list:set", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX); |
f830837f JK |
27 | MODULE_ALIAS("ip_set_list:set"); |
28 | ||
7d47d972 | 29 | /* Member elements */ |
f830837f | 30 | struct set_elem { |
00590fdd JK |
31 | struct rcu_head rcu; |
32 | struct list_head list; | |
45040978 | 33 | struct ip_set *set; /* Sigh, in order to cleanup reference */ |
f830837f | 34 | ip_set_id_t id; |
95ad1f4a | 35 | } __aligned(__alignof__(u64)); |
f830837f | 36 | |
7d47d972 JK |
37 | struct set_adt_elem { |
38 | ip_set_id_t id; | |
39 | ip_set_id_t refid; | |
40 | int before; | |
41 | }; | |
42 | ||
f830837f JK |
43 | /* Type structure */ |
44 | struct list_set { | |
f830837f | 45 | u32 size; /* size of set list array */ |
f830837f | 46 | struct timer_list gc; /* garbage collection */ |
1785e8f4 | 47 | struct net *net; /* namespace */ |
00590fdd | 48 | struct list_head members; /* the set members */ |
f830837f JK |
49 | }; |
50 | ||
7d47d972 JK |
51 | static int |
52 | list_set_ktest(struct ip_set *set, const struct sk_buff *skb, | |
53 | const struct xt_action_param *par, | |
54 | struct ip_set_adt_opt *opt, const struct ip_set_ext *ext) | |
f830837f | 55 | { |
7d47d972 JK |
56 | struct list_set *map = set->data; |
57 | struct set_elem *e; | |
00590fdd | 58 | u32 cmdflags = opt->cmdflags; |
7d47d972 | 59 | int ret; |
f830837f | 60 | |
6e01781d JK |
61 | /* Don't lookup sub-counters at all */ |
62 | opt->cmdflags &= ~IPSET_FLAG_MATCH_COUNTERS; | |
63 | if (opt->cmdflags & IPSET_FLAG_SKIP_SUBCOUNTER_UPDATE) | |
64 | opt->cmdflags &= ~IPSET_FLAG_SKIP_COUNTER_UPDATE; | |
00590fdd | 65 | list_for_each_entry_rcu(e, &map->members, list) { |
7d47d972 | 66 | if (SET_WITH_TIMEOUT(set) && |
ca134ce8 | 67 | ip_set_timeout_expired(ext_timeout(e, set))) |
7d47d972 JK |
68 | continue; |
69 | ret = ip_set_test(e->id, skb, par, opt); | |
de76303c JK |
70 | if (ret > 0) { |
71 | if (SET_WITH_COUNTER(set)) | |
ca134ce8 | 72 | ip_set_update_counter(ext_counter(e, set), |
de76303c | 73 | ext, &opt->ext, |
6e01781d | 74 | cmdflags); |
cbee93d7 AD |
75 | if (SET_WITH_SKBINFO(set)) |
76 | ip_set_get_skbinfo(ext_skbinfo(e, set), | |
77 | ext, &opt->ext, | |
78 | cmdflags); | |
7d47d972 | 79 | return ret; |
de76303c | 80 | } |
7d47d972 JK |
81 | } |
82 | return 0; | |
f830837f JK |
83 | } |
84 | ||
7d47d972 JK |
85 | static int |
86 | list_set_kadd(struct ip_set *set, const struct sk_buff *skb, | |
87 | const struct xt_action_param *par, | |
88 | struct ip_set_adt_opt *opt, const struct ip_set_ext *ext) | |
f830837f | 89 | { |
7d47d972 JK |
90 | struct list_set *map = set->data; |
91 | struct set_elem *e; | |
7d47d972 | 92 | int ret; |
f830837f | 93 | |
00590fdd | 94 | list_for_each_entry(e, &map->members, list) { |
7d47d972 | 95 | if (SET_WITH_TIMEOUT(set) && |
ca134ce8 | 96 | ip_set_timeout_expired(ext_timeout(e, set))) |
7d47d972 JK |
97 | continue; |
98 | ret = ip_set_add(e->id, skb, par, opt); | |
99 | if (ret == 0) | |
100 | return ret; | |
101 | } | |
102 | return 0; | |
f830837f JK |
103 | } |
104 | ||
f830837f | 105 | static int |
7d47d972 | 106 | list_set_kdel(struct ip_set *set, const struct sk_buff *skb, |
b66554cf | 107 | const struct xt_action_param *par, |
7d47d972 | 108 | struct ip_set_adt_opt *opt, const struct ip_set_ext *ext) |
f830837f JK |
109 | { |
110 | struct list_set *map = set->data; | |
7d47d972 | 111 | struct set_elem *e; |
f830837f JK |
112 | int ret; |
113 | ||
00590fdd | 114 | list_for_each_entry(e, &map->members, list) { |
7d47d972 | 115 | if (SET_WITH_TIMEOUT(set) && |
ca134ce8 | 116 | ip_set_timeout_expired(ext_timeout(e, set))) |
f830837f | 117 | continue; |
7d47d972 JK |
118 | ret = ip_set_del(e->id, skb, par, opt); |
119 | if (ret == 0) | |
120 | return ret; | |
121 | } | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int | |
126 | list_set_kadt(struct ip_set *set, const struct sk_buff *skb, | |
127 | const struct xt_action_param *par, | |
128 | enum ipset_adt adt, struct ip_set_adt_opt *opt) | |
129 | { | |
ca134ce8 | 130 | struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); |
00590fdd | 131 | int ret = -EINVAL; |
7d47d972 | 132 | |
00590fdd | 133 | rcu_read_lock(); |
7d47d972 JK |
134 | switch (adt) { |
135 | case IPSET_TEST: | |
00590fdd JK |
136 | ret = list_set_ktest(set, skb, par, opt, &ext); |
137 | break; | |
7d47d972 | 138 | case IPSET_ADD: |
00590fdd JK |
139 | ret = list_set_kadd(set, skb, par, opt, &ext); |
140 | break; | |
7d47d972 | 141 | case IPSET_DEL: |
00590fdd JK |
142 | ret = list_set_kdel(set, skb, par, opt, &ext); |
143 | break; | |
7d47d972 JK |
144 | default: |
145 | break; | |
f830837f | 146 | } |
00590fdd | 147 | rcu_read_unlock(); |
f830837f | 148 | |
00590fdd | 149 | return ret; |
7d47d972 JK |
150 | } |
151 | ||
00590fdd | 152 | /* Userspace interfaces: we are protected by the nfnl mutex */ |
5416219e | 153 | |
00590fdd | 154 | static void |
45040978 | 155 | __list_set_del_rcu(struct rcu_head * rcu) |
5416219e | 156 | { |
45040978 JK |
157 | struct set_elem *e = container_of(rcu, struct set_elem, rcu); |
158 | struct ip_set *set = e->set; | |
7d47d972 | 159 | struct list_set *map = set->data; |
5416219e | 160 | |
1785e8f4 | 161 | ip_set_put_byindex(map->net, e->id); |
40cd63bf | 162 | ip_set_ext_destroy(set, e); |
45040978 | 163 | kfree(e); |
00590fdd | 164 | } |
f830837f | 165 | |
00590fdd JK |
166 | static inline void |
167 | list_set_del(struct ip_set *set, struct set_elem *e) | |
168 | { | |
169 | list_del_rcu(&e->list); | |
45040978 | 170 | call_rcu(&e->rcu, __list_set_del_rcu); |
00590fdd | 171 | } |
7d47d972 | 172 | |
00590fdd | 173 | static inline void |
45040978 | 174 | list_set_replace(struct set_elem *e, struct set_elem *old) |
00590fdd JK |
175 | { |
176 | list_replace_rcu(&old->list, &e->list); | |
45040978 | 177 | call_rcu(&old->rcu, __list_set_del_rcu); |
f830837f JK |
178 | } |
179 | ||
180 | static void | |
7d47d972 | 181 | set_cleanup_entries(struct ip_set *set) |
f830837f | 182 | { |
7d47d972 | 183 | struct list_set *map = set->data; |
00590fdd | 184 | struct set_elem *e, *n; |
f830837f | 185 | |
00590fdd JK |
186 | list_for_each_entry_safe(e, n, &map->members, list) |
187 | if (ip_set_timeout_expired(ext_timeout(e, set))) | |
188 | list_set_del(set, e); | |
f830837f JK |
189 | } |
190 | ||
7d47d972 JK |
191 | static int |
192 | list_set_utest(struct ip_set *set, void *value, const struct ip_set_ext *ext, | |
193 | struct ip_set_ext *mext, u32 flags) | |
f830837f | 194 | { |
7d47d972 JK |
195 | struct list_set *map = set->data; |
196 | struct set_adt_elem *d = value; | |
00590fdd | 197 | struct set_elem *e, *next, *prev = NULL; |
7d47d972 | 198 | int ret; |
f830837f | 199 | |
00590fdd JK |
200 | list_for_each_entry(e, &map->members, list) { |
201 | if (SET_WITH_TIMEOUT(set) && | |
202 | ip_set_timeout_expired(ext_timeout(e, set))) | |
7d47d972 | 203 | continue; |
00590fdd JK |
204 | else if (e->id != d->id) { |
205 | prev = e; | |
7d47d972 | 206 | continue; |
00590fdd | 207 | } |
7d47d972 | 208 | |
ca0f6a5c | 209 | if (d->before == 0) { |
00590fdd | 210 | ret = 1; |
ca0f6a5c | 211 | } else if (d->before > 0) { |
00590fdd JK |
212 | next = list_next_entry(e, list); |
213 | ret = !list_is_last(&e->list, &map->members) && | |
214 | next->id == d->refid; | |
ca0f6a5c | 215 | } else { |
00590fdd | 216 | ret = prev && prev->id == d->refid; |
ca0f6a5c | 217 | } |
7d47d972 | 218 | return ret; |
f830837f | 219 | } |
7d47d972 | 220 | return 0; |
f830837f JK |
221 | } |
222 | ||
00590fdd JK |
223 | static void |
224 | list_set_init_extensions(struct ip_set *set, const struct ip_set_ext *ext, | |
225 | struct set_elem *e) | |
226 | { | |
227 | if (SET_WITH_COUNTER(set)) | |
228 | ip_set_init_counter(ext_counter(e, set), ext); | |
229 | if (SET_WITH_COMMENT(set)) | |
230 | ip_set_init_comment(ext_comment(e, set), ext); | |
231 | if (SET_WITH_SKBINFO(set)) | |
232 | ip_set_init_skbinfo(ext_skbinfo(e, set), ext); | |
233 | /* Update timeout last */ | |
234 | if (SET_WITH_TIMEOUT(set)) | |
235 | ip_set_timeout_set(ext_timeout(e, set), ext->timeout); | |
236 | } | |
7d47d972 | 237 | |
f830837f | 238 | static int |
7d47d972 JK |
239 | list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext, |
240 | struct ip_set_ext *mext, u32 flags) | |
f830837f | 241 | { |
7d47d972 JK |
242 | struct list_set *map = set->data; |
243 | struct set_adt_elem *d = value; | |
00590fdd | 244 | struct set_elem *e, *n, *prev, *next; |
7d47d972 | 245 | bool flag_exist = flags & IPSET_FLAG_EXIST; |
f830837f | 246 | |
00590fdd JK |
247 | /* Find where to add the new entry */ |
248 | n = prev = next = NULL; | |
249 | list_for_each_entry(e, &map->members, list) { | |
250 | if (SET_WITH_TIMEOUT(set) && | |
251 | ip_set_timeout_expired(ext_timeout(e, set))) | |
7d47d972 | 252 | continue; |
00590fdd JK |
253 | else if (d->id == e->id) |
254 | n = e; | |
255 | else if (d->before == 0 || e->id != d->refid) | |
256 | continue; | |
257 | else if (d->before > 0) | |
258 | next = e; | |
259 | else | |
260 | prev = e; | |
261 | } | |
262 | /* Re-add already existing element */ | |
263 | if (n) { | |
264 | if ((d->before > 0 && !next) || | |
265 | (d->before < 0 && !prev)) | |
7d47d972 JK |
266 | return -IPSET_ERR_REF_EXIST; |
267 | if (!flag_exist) | |
7d47d972 JK |
268 | return -IPSET_ERR_EXIST; |
269 | /* Update extensions */ | |
00590fdd JK |
270 | ip_set_ext_destroy(set, n); |
271 | list_set_init_extensions(set, ext, n); | |
40cd63bf | 272 | |
7d47d972 | 273 | /* Set is already added to the list */ |
1785e8f4 | 274 | ip_set_put_byindex(map->net, d->id); |
7d47d972 JK |
275 | return 0; |
276 | } | |
00590fdd JK |
277 | /* Add new entry */ |
278 | if (d->before == 0) { | |
279 | /* Append */ | |
280 | n = list_empty(&map->members) ? NULL : | |
281 | list_last_entry(&map->members, struct set_elem, list); | |
282 | } else if (d->before > 0) { | |
283 | /* Insert after next element */ | |
284 | if (!list_is_last(&next->list, &map->members)) | |
285 | n = list_next_entry(next, list); | |
286 | } else { | |
287 | /* Insert before prev element */ | |
288 | if (prev->list.prev != &map->members) | |
289 | n = list_prev_entry(prev, list); | |
02f815cb | 290 | } |
00590fdd JK |
291 | /* Can we replace a timed out entry? */ |
292 | if (n && | |
293 | !(SET_WITH_TIMEOUT(set) && | |
294 | ip_set_timeout_expired(ext_timeout(n, set)))) | |
295 | n = NULL; | |
296 | ||
00db674b | 297 | e = kzalloc(set->dsize, GFP_ATOMIC); |
00590fdd JK |
298 | if (!e) |
299 | return -ENOMEM; | |
300 | e->id = d->id; | |
45040978 | 301 | e->set = set; |
00590fdd JK |
302 | INIT_LIST_HEAD(&e->list); |
303 | list_set_init_extensions(set, ext, e); | |
304 | if (n) | |
45040978 | 305 | list_set_replace(e, n); |
00590fdd JK |
306 | else if (next) |
307 | list_add_tail_rcu(&e->list, &next->list); | |
308 | else if (prev) | |
309 | list_add_rcu(&e->list, &prev->list); | |
310 | else | |
311 | list_add_tail_rcu(&e->list, &map->members); | |
f830837f | 312 | |
00590fdd | 313 | return 0; |
f830837f JK |
314 | } |
315 | ||
316 | static int | |
7d47d972 JK |
317 | list_set_udel(struct ip_set *set, void *value, const struct ip_set_ext *ext, |
318 | struct ip_set_ext *mext, u32 flags) | |
f830837f | 319 | { |
7d47d972 JK |
320 | struct list_set *map = set->data; |
321 | struct set_adt_elem *d = value; | |
00590fdd JK |
322 | struct set_elem *e, *next, *prev = NULL; |
323 | ||
324 | list_for_each_entry(e, &map->members, list) { | |
325 | if (SET_WITH_TIMEOUT(set) && | |
326 | ip_set_timeout_expired(ext_timeout(e, set))) | |
7d47d972 | 327 | continue; |
00590fdd JK |
328 | else if (e->id != d->id) { |
329 | prev = e; | |
7d47d972 | 330 | continue; |
00590fdd | 331 | } |
7d47d972 | 332 | |
00590fdd JK |
333 | if (d->before > 0) { |
334 | next = list_next_entry(e, list); | |
335 | if (list_is_last(&e->list, &map->members) || | |
336 | next->id != d->refid) | |
7d47d972 | 337 | return -IPSET_ERR_REF_EXIST; |
00590fdd JK |
338 | } else if (d->before < 0) { |
339 | if (!prev || prev->id != d->refid) | |
340 | return -IPSET_ERR_REF_EXIST; | |
341 | } | |
342 | list_set_del(set, e); | |
343 | return 0; | |
5416219e | 344 | } |
00590fdd | 345 | return d->before != 0 ? -IPSET_ERR_REF_EXIST : -IPSET_ERR_EXIST; |
5416219e JK |
346 | } |
347 | ||
f830837f JK |
348 | static int |
349 | list_set_uadt(struct ip_set *set, struct nlattr *tb[], | |
3d14b171 | 350 | enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) |
f830837f | 351 | { |
1785e8f4 | 352 | struct list_set *map = set->data; |
7d47d972 JK |
353 | ipset_adtfn adtfn = set->variant->adt[adt]; |
354 | struct set_adt_elem e = { .refid = IPSET_INVALID_ID }; | |
ca134ce8 | 355 | struct ip_set_ext ext = IP_SET_INIT_UEXT(set); |
f830837f | 356 | struct ip_set *s; |
f830837f JK |
357 | int ret = 0; |
358 | ||
a212e08e SP |
359 | if (tb[IPSET_ATTR_LINENO]) |
360 | *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); | |
361 | ||
f830837f | 362 | if (unlikely(!tb[IPSET_ATTR_NAME] || |
7dd37bc8 | 363 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) |
f830837f JK |
364 | return -IPSET_ERR_PROTOCOL; |
365 | ||
7d47d972 JK |
366 | ret = ip_set_get_extensions(set, tb, &ext); |
367 | if (ret) | |
368 | return ret; | |
1785e8f4 | 369 | e.id = ip_set_get_byname(map->net, nla_data(tb[IPSET_ATTR_NAME]), &s); |
7d47d972 | 370 | if (e.id == IPSET_INVALID_ID) |
f830837f JK |
371 | return -IPSET_ERR_NAME; |
372 | /* "Loop detection" */ | |
373 | if (s->type->features & IPSET_TYPE_NAME) { | |
374 | ret = -IPSET_ERR_LOOP; | |
375 | goto finish; | |
376 | } | |
377 | ||
378 | if (tb[IPSET_ATTR_CADT_FLAGS]) { | |
379 | u32 f = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); | |
00590fdd | 380 | |
7d47d972 | 381 | e.before = f & IPSET_FLAG_BEFORE; |
f830837f JK |
382 | } |
383 | ||
7d47d972 | 384 | if (e.before && !tb[IPSET_ATTR_NAMEREF]) { |
f830837f JK |
385 | ret = -IPSET_ERR_BEFORE; |
386 | goto finish; | |
387 | } | |
388 | ||
389 | if (tb[IPSET_ATTR_NAMEREF]) { | |
1785e8f4 VL |
390 | e.refid = ip_set_get_byname(map->net, |
391 | nla_data(tb[IPSET_ATTR_NAMEREF]), | |
7d47d972 JK |
392 | &s); |
393 | if (e.refid == IPSET_INVALID_ID) { | |
f830837f JK |
394 | ret = -IPSET_ERR_NAMEREF; |
395 | goto finish; | |
396 | } | |
7d47d972 JK |
397 | if (!e.before) |
398 | e.before = -1; | |
f830837f | 399 | } |
7d47d972 JK |
400 | if (adt != IPSET_TEST && SET_WITH_TIMEOUT(set)) |
401 | set_cleanup_entries(set); | |
f830837f | 402 | |
7d47d972 | 403 | ret = adtfn(set, &e, &ext, &ext, flags); |
f830837f JK |
404 | |
405 | finish: | |
7d47d972 | 406 | if (e.refid != IPSET_INVALID_ID) |
1785e8f4 | 407 | ip_set_put_byindex(map->net, e.refid); |
f830837f | 408 | if (adt != IPSET_ADD || ret) |
1785e8f4 | 409 | ip_set_put_byindex(map->net, e.id); |
f830837f JK |
410 | |
411 | return ip_set_eexist(ret, flags) ? 0 : ret; | |
412 | } | |
413 | ||
414 | static void | |
415 | list_set_flush(struct ip_set *set) | |
416 | { | |
417 | struct list_set *map = set->data; | |
00590fdd JK |
418 | struct set_elem *e, *n; |
419 | ||
420 | list_for_each_entry_safe(e, n, &map->members, list) | |
421 | list_set_del(set, e); | |
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 | ||
444 | static int | |
445 | list_set_head(struct ip_set *set, struct sk_buff *skb) | |
446 | { | |
447 | const struct list_set *map = set->data; | |
448 | struct nlattr *nested; | |
00590fdd JK |
449 | struct set_elem *e; |
450 | u32 n = 0; | |
451 | ||
45040978 JK |
452 | rcu_read_lock(); |
453 | list_for_each_entry_rcu(e, &map->members, list) | |
00590fdd | 454 | n++; |
45040978 | 455 | rcu_read_unlock(); |
f830837f JK |
456 | |
457 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); | |
458 | if (!nested) | |
459 | goto nla_put_failure; | |
7cf7899d | 460 | if (nla_put_net32(skb, IPSET_ATTR_SIZE, htonl(map->size)) || |
596cf3fe | 461 | nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) || |
7cf7899d | 462 | nla_put_net32(skb, IPSET_ATTR_MEMSIZE, |
00590fdd | 463 | htonl(sizeof(*map) + n * set->dsize))) |
7cf7899d | 464 | goto nla_put_failure; |
81b10bb4 OS |
465 | if (unlikely(ip_set_put_flags(skb, set))) |
466 | goto nla_put_failure; | |
f830837f JK |
467 | ipset_nest_end(skb, nested); |
468 | ||
469 | return 0; | |
470 | nla_put_failure: | |
471 | return -EMSGSIZE; | |
472 | } | |
473 | ||
474 | static int | |
475 | list_set_list(const struct ip_set *set, | |
476 | struct sk_buff *skb, struct netlink_callback *cb) | |
477 | { | |
478 | const struct list_set *map = set->data; | |
479 | struct nlattr *atd, *nested; | |
00590fdd JK |
480 | u32 i = 0, first = cb->args[IPSET_CB_ARG0]; |
481 | struct set_elem *e; | |
482 | int ret = 0; | |
f830837f JK |
483 | |
484 | atd = ipset_nest_start(skb, IPSET_ATTR_ADT); | |
485 | if (!atd) | |
486 | return -EMSGSIZE; | |
00590fdd JK |
487 | |
488 | rcu_read_lock(); | |
45040978 JK |
489 | list_for_each_entry_rcu(e, &map->members, list) { |
490 | if (i < first || | |
491 | (SET_WITH_TIMEOUT(set) && | |
492 | ip_set_timeout_expired(ext_timeout(e, set)))) { | |
493 | i++; | |
f830837f | 494 | continue; |
45040978 | 495 | } |
f830837f | 496 | nested = ipset_nest_start(skb, IPSET_ATTR_DATA); |
45040978 | 497 | if (!nested) |
00590fdd | 498 | goto nla_put_failure; |
7cf7899d | 499 | if (nla_put_string(skb, IPSET_ATTR_NAME, |
1785e8f4 | 500 | ip_set_name_byindex(map->net, e->id))) |
7cf7899d | 501 | goto nla_put_failure; |
3fd986b3 | 502 | if (ip_set_put_extensions(skb, set, e, true)) |
81b10bb4 | 503 | goto nla_put_failure; |
f830837f | 504 | ipset_nest_end(skb, nested); |
45040978 | 505 | i++; |
f830837f | 506 | } |
00590fdd | 507 | |
f830837f JK |
508 | ipset_nest_end(skb, atd); |
509 | /* Set listing finished */ | |
93302880 | 510 | cb->args[IPSET_CB_ARG0] = 0; |
00590fdd | 511 | goto out; |
f830837f JK |
512 | |
513 | nla_put_failure: | |
514 | nla_nest_cancel(skb, nested); | |
f830837f | 515 | if (unlikely(i == first)) { |
45040978 | 516 | nla_nest_cancel(skb, atd); |
93302880 | 517 | cb->args[IPSET_CB_ARG0] = 0; |
00590fdd | 518 | ret = -EMSGSIZE; |
45040978 JK |
519 | } else { |
520 | cb->args[IPSET_CB_ARG0] = i; | |
f830837f | 521 | } |
122ebbf2 | 522 | ipset_nest_end(skb, atd); |
00590fdd JK |
523 | out: |
524 | rcu_read_unlock(); | |
525 | return ret; | |
f830837f JK |
526 | } |
527 | ||
528 | static bool | |
529 | list_set_same_set(const struct ip_set *a, const struct ip_set *b) | |
530 | { | |
531 | const struct list_set *x = a->data; | |
532 | const struct list_set *y = b->data; | |
533 | ||
534 | return x->size == y->size && | |
ca134ce8 | 535 | a->timeout == b->timeout && |
7d47d972 | 536 | a->extensions == b->extensions; |
f830837f JK |
537 | } |
538 | ||
7d47d972 | 539 | static const struct ip_set_type_variant set_variant = { |
f830837f JK |
540 | .kadt = list_set_kadt, |
541 | .uadt = list_set_uadt, | |
7d47d972 JK |
542 | .adt = { |
543 | [IPSET_ADD] = list_set_uadd, | |
544 | [IPSET_DEL] = list_set_udel, | |
545 | [IPSET_TEST] = list_set_utest, | |
546 | }, | |
f830837f JK |
547 | .destroy = list_set_destroy, |
548 | .flush = list_set_flush, | |
549 | .head = list_set_head, | |
550 | .list = list_set_list, | |
551 | .same_set = list_set_same_set, | |
552 | }; | |
553 | ||
554 | static void | |
555 | list_set_gc(unsigned long ul_set) | |
556 | { | |
ca0f6a5c | 557 | struct ip_set *set = (struct ip_set *)ul_set; |
f830837f | 558 | struct list_set *map = set->data; |
2f9f28b2 | 559 | |
00590fdd | 560 | spin_lock_bh(&set->lock); |
7d47d972 | 561 | set_cleanup_entries(set); |
00590fdd | 562 | spin_unlock_bh(&set->lock); |
f830837f | 563 | |
ca134ce8 | 564 | map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ; |
f830837f JK |
565 | add_timer(&map->gc); |
566 | } | |
567 | ||
568 | static void | |
7d47d972 | 569 | list_set_gc_init(struct ip_set *set, void (*gc)(unsigned long ul_set)) |
f830837f JK |
570 | { |
571 | struct list_set *map = set->data; | |
572 | ||
573 | init_timer(&map->gc); | |
ca0f6a5c | 574 | map->gc.data = (unsigned long)set; |
7d47d972 | 575 | map->gc.function = gc; |
ca134ce8 | 576 | map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ; |
f830837f JK |
577 | add_timer(&map->gc); |
578 | } | |
579 | ||
580 | /* Create list:set type of sets */ | |
581 | ||
03c8b234 | 582 | static bool |
1785e8f4 | 583 | init_list_set(struct net *net, struct ip_set *set, u32 size) |
f830837f JK |
584 | { |
585 | struct list_set *map; | |
f830837f | 586 | |
00590fdd | 587 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
f830837f | 588 | if (!map) |
03c8b234 | 589 | return false; |
f830837f JK |
590 | |
591 | map->size = size; | |
1785e8f4 | 592 | map->net = net; |
00590fdd | 593 | INIT_LIST_HEAD(&map->members); |
f830837f JK |
594 | set->data = map; |
595 | ||
03c8b234 | 596 | return true; |
f830837f JK |
597 | } |
598 | ||
599 | static int | |
1785e8f4 VL |
600 | list_set_create(struct net *net, struct ip_set *set, struct nlattr *tb[], |
601 | u32 flags) | |
f830837f | 602 | { |
03c8b234 | 603 | u32 size = IP_SET_LIST_DEFAULT_SIZE; |
f830837f JK |
604 | |
605 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_SIZE) || | |
de76303c JK |
606 | !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || |
607 | !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS))) | |
f830837f JK |
608 | return -IPSET_ERR_PROTOCOL; |
609 | ||
610 | if (tb[IPSET_ATTR_SIZE]) | |
611 | size = ip_set_get_h32(tb[IPSET_ATTR_SIZE]); | |
612 | if (size < IP_SET_LIST_MIN_SIZE) | |
613 | size = IP_SET_LIST_MIN_SIZE; | |
614 | ||
7d47d972 | 615 | set->variant = &set_variant; |
95ad1f4a JK |
616 | set->dsize = ip_set_elem_len(set, tb, sizeof(struct set_elem), |
617 | __alignof__(struct set_elem)); | |
1785e8f4 | 618 | if (!init_list_set(net, set, size)) |
03c8b234 JK |
619 | return -ENOMEM; |
620 | if (tb[IPSET_ATTR_TIMEOUT]) { | |
621 | set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
7d47d972 | 622 | list_set_gc_init(set, list_set_gc); |
f830837f | 623 | } |
f830837f JK |
624 | return 0; |
625 | } | |
626 | ||
627 | static struct ip_set_type list_set_type __read_mostly = { | |
628 | .name = "list:set", | |
629 | .protocol = IPSET_PROTOCOL, | |
630 | .features = IPSET_TYPE_NAME | IPSET_DUMP_LAST, | |
631 | .dimension = IPSET_DIM_ONE, | |
c15f1c83 | 632 | .family = NFPROTO_UNSPEC, |
35b8dcf8 JK |
633 | .revision_min = IPSET_TYPE_REV_MIN, |
634 | .revision_max = IPSET_TYPE_REV_MAX, | |
f830837f JK |
635 | .create = list_set_create, |
636 | .create_policy = { | |
637 | [IPSET_ATTR_SIZE] = { .type = NLA_U32 }, | |
638 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
de76303c | 639 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, |
f830837f JK |
640 | }, |
641 | .adt_policy = { | |
642 | [IPSET_ATTR_NAME] = { .type = NLA_STRING, | |
643 | .len = IPSET_MAXNAMELEN }, | |
644 | [IPSET_ATTR_NAMEREF] = { .type = NLA_STRING, | |
645 | .len = IPSET_MAXNAMELEN }, | |
646 | [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, | |
647 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, | |
648 | [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, | |
de76303c JK |
649 | [IPSET_ATTR_BYTES] = { .type = NLA_U64 }, |
650 | [IPSET_ATTR_PACKETS] = { .type = NLA_U64 }, | |
03726186 SP |
651 | [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING, |
652 | .len = IPSET_MAX_COMMENT_SIZE }, | |
cbee93d7 AD |
653 | [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 }, |
654 | [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 }, | |
655 | [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 }, | |
f830837f JK |
656 | }, |
657 | .me = THIS_MODULE, | |
658 | }; | |
659 | ||
660 | static int __init | |
661 | list_set_init(void) | |
662 | { | |
663 | return ip_set_type_register(&list_set_type); | |
664 | } | |
665 | ||
666 | static void __exit | |
667 | list_set_fini(void) | |
668 | { | |
00590fdd | 669 | rcu_barrier(); |
f830837f JK |
670 | ip_set_type_unregister(&list_set_type); |
671 | } | |
672 | ||
673 | module_init(list_set_init); | |
674 | module_exit(list_set_fini); |