Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
a7b4f989 JK |
2 | /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu> |
3 | * Patrick Schaaf <bof@bof.de> | |
fe03d474 | 4 | * Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org> |
a7b4f989 JK |
5 | */ |
6 | ||
7 | /* Kernel module for IP set management */ | |
8 | ||
9 | #include <linux/init.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/moduleparam.h> | |
12 | #include <linux/ip.h> | |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/spinlock.h> | |
a7b4f989 | 15 | #include <linux/rculist.h> |
a7b4f989 | 16 | #include <net/netlink.h> |
1785e8f4 VL |
17 | #include <net/net_namespace.h> |
18 | #include <net/netns/generic.h> | |
a7b4f989 JK |
19 | |
20 | #include <linux/netfilter.h> | |
b66554cf | 21 | #include <linux/netfilter/x_tables.h> |
a7b4f989 JK |
22 | #include <linux/netfilter/nfnetlink.h> |
23 | #include <linux/netfilter/ipset/ip_set.h> | |
24 | ||
25 | static LIST_HEAD(ip_set_type_list); /* all registered set types */ | |
26 | static DEFINE_MUTEX(ip_set_type_mutex); /* protects ip_set_type_list */ | |
2f9f28b2 | 27 | static DEFINE_RWLOCK(ip_set_ref_lock); /* protects the set refs */ |
a7b4f989 | 28 | |
1785e8f4 VL |
29 | struct ip_set_net { |
30 | struct ip_set * __rcu *ip_set_list; /* all individual sets */ | |
31 | ip_set_id_t ip_set_max; /* max number of sets */ | |
9c1ba5c8 JK |
32 | bool is_deleted; /* deleted by ip_set_net_exit */ |
33 | bool is_destroyed; /* all sets are destroyed */ | |
1785e8f4 | 34 | }; |
ca0f6a5c | 35 | |
c7d03a00 | 36 | static unsigned int ip_set_net_id __read_mostly; |
1785e8f4 | 37 | |
8dea982a | 38 | static struct ip_set_net *ip_set_pernet(struct net *net) |
1785e8f4 VL |
39 | { |
40 | return net_generic(net, ip_set_net_id); | |
41 | } | |
a7b4f989 | 42 | |
9076aea7 | 43 | #define IP_SET_INC 64 |
22496f09 | 44 | #define STRNCMP(a, b) (strncmp(a, b, IPSET_MAXNAMELEN) == 0) |
a7b4f989 JK |
45 | |
46 | static unsigned int max_sets; | |
47 | ||
48 | module_param(max_sets, int, 0600); | |
49 | MODULE_PARM_DESC(max_sets, "maximal number of sets"); | |
50 | MODULE_LICENSE("GPL"); | |
fe03d474 | 51 | MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>"); |
a7b4f989 JK |
52 | MODULE_DESCRIPTION("core IP set support"); |
53 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET); | |
54 | ||
8a02bdd5 | 55 | /* When the nfnl mutex or ip_set_ref_lock is held: */ |
3e90ebd3 | 56 | #define ip_set_dereference(p) \ |
8a02bdd5 JK |
57 | rcu_dereference_protected(p, \ |
58 | lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET) || \ | |
59 | lockdep_is_held(&ip_set_ref_lock)) | |
3e90ebd3 PM |
60 | #define ip_set(inst, id) \ |
61 | ip_set_dereference((inst)->ip_set_list)[id] | |
8a02bdd5 JK |
62 | #define ip_set_ref_netlink(inst,id) \ |
63 | rcu_dereference_raw((inst)->ip_set_list)[id] | |
28628fa9 JK |
64 | #define ip_set_dereference_nfnl(p) \ |
65 | rcu_dereference_check(p, lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET)) | |
9076aea7 | 66 | |
ca0f6a5c | 67 | /* The set types are implemented in modules and registered set types |
a7b4f989 JK |
68 | * can be found in ip_set_type_list. Adding/deleting types is |
69 | * serialized by ip_set_type_mutex. | |
70 | */ | |
71 | ||
8dea982a | 72 | static void |
a7b4f989 JK |
73 | ip_set_type_lock(void) |
74 | { | |
75 | mutex_lock(&ip_set_type_mutex); | |
76 | } | |
77 | ||
8dea982a | 78 | static void |
a7b4f989 JK |
79 | ip_set_type_unlock(void) |
80 | { | |
81 | mutex_unlock(&ip_set_type_mutex); | |
82 | } | |
83 | ||
84 | /* Register and deregister settype */ | |
85 | ||
86 | static struct ip_set_type * | |
87 | find_set_type(const char *name, u8 family, u8 revision) | |
88 | { | |
89 | struct ip_set_type *type; | |
90 | ||
b135fc08 AG |
91 | list_for_each_entry_rcu(type, &ip_set_type_list, list, |
92 | lockdep_is_held(&ip_set_type_mutex)) | |
22496f09 | 93 | if (STRNCMP(type->name, name) && |
3ace95c0 JK |
94 | (type->family == family || |
95 | type->family == NFPROTO_UNSPEC) && | |
f1e00b39 JK |
96 | revision >= type->revision_min && |
97 | revision <= type->revision_max) | |
a7b4f989 JK |
98 | return type; |
99 | return NULL; | |
100 | } | |
101 | ||
102 | /* Unlock, try to load a set type module and lock again */ | |
088067f4 JK |
103 | static bool |
104 | load_settype(const char *name) | |
a7b4f989 | 105 | { |
c14b78e7 | 106 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
a7b4f989 JK |
107 | pr_debug("try to load ip_set_%s\n", name); |
108 | if (request_module("ip_set_%s", name) < 0) { | |
b167a37c | 109 | pr_warn("Can't find ip_set type %s\n", name); |
c14b78e7 | 110 | nfnl_lock(NFNL_SUBSYS_IPSET); |
088067f4 | 111 | return false; |
a7b4f989 | 112 | } |
c14b78e7 | 113 | nfnl_lock(NFNL_SUBSYS_IPSET); |
088067f4 | 114 | return true; |
a7b4f989 JK |
115 | } |
116 | ||
117 | /* Find a set type and reference it */ | |
088067f4 JK |
118 | #define find_set_type_get(name, family, revision, found) \ |
119 | __find_set_type_get(name, family, revision, found, false) | |
120 | ||
a7b4f989 | 121 | static int |
088067f4 JK |
122 | __find_set_type_get(const char *name, u8 family, u8 revision, |
123 | struct ip_set_type **found, bool retry) | |
a7b4f989 | 124 | { |
5c1aba46 JK |
125 | struct ip_set_type *type; |
126 | int err; | |
127 | ||
088067f4 JK |
128 | if (retry && !load_settype(name)) |
129 | return -IPSET_ERR_FIND_TYPE; | |
130 | ||
a7b4f989 JK |
131 | rcu_read_lock(); |
132 | *found = find_set_type(name, family, revision); | |
133 | if (*found) { | |
5c1aba46 JK |
134 | err = !try_module_get((*found)->me) ? -EFAULT : 0; |
135 | goto unlock; | |
a7b4f989 | 136 | } |
088067f4 | 137 | /* Make sure the type is already loaded |
ca0f6a5c JK |
138 | * but we don't support the revision |
139 | */ | |
5c1aba46 | 140 | list_for_each_entry_rcu(type, &ip_set_type_list, list) |
22496f09 | 141 | if (STRNCMP(type->name, name)) { |
5c1aba46 JK |
142 | err = -IPSET_ERR_FIND_TYPE; |
143 | goto unlock; | |
144 | } | |
a7b4f989 JK |
145 | rcu_read_unlock(); |
146 | ||
088067f4 JK |
147 | return retry ? -IPSET_ERR_FIND_TYPE : |
148 | __find_set_type_get(name, family, revision, found, true); | |
5c1aba46 JK |
149 | |
150 | unlock: | |
151 | rcu_read_unlock(); | |
152 | return err; | |
a7b4f989 JK |
153 | } |
154 | ||
155 | /* Find a given set type by name and family. | |
156 | * If we succeeded, the supported minimal and maximum revisions are | |
157 | * filled out. | |
158 | */ | |
088067f4 JK |
159 | #define find_set_type_minmax(name, family, min, max) \ |
160 | __find_set_type_minmax(name, family, min, max, false) | |
161 | ||
a7b4f989 | 162 | static int |
088067f4 JK |
163 | __find_set_type_minmax(const char *name, u8 family, u8 *min, u8 *max, |
164 | bool retry) | |
a7b4f989 JK |
165 | { |
166 | struct ip_set_type *type; | |
167 | bool found = false; | |
168 | ||
088067f4 JK |
169 | if (retry && !load_settype(name)) |
170 | return -IPSET_ERR_FIND_TYPE; | |
171 | ||
5c1aba46 | 172 | *min = 255; *max = 0; |
a7b4f989 JK |
173 | rcu_read_lock(); |
174 | list_for_each_entry_rcu(type, &ip_set_type_list, list) | |
22496f09 | 175 | if (STRNCMP(type->name, name) && |
3ace95c0 JK |
176 | (type->family == family || |
177 | type->family == NFPROTO_UNSPEC)) { | |
a7b4f989 | 178 | found = true; |
f1e00b39 JK |
179 | if (type->revision_min < *min) |
180 | *min = type->revision_min; | |
181 | if (type->revision_max > *max) | |
182 | *max = type->revision_max; | |
a7b4f989 JK |
183 | } |
184 | rcu_read_unlock(); | |
185 | if (found) | |
186 | return 0; | |
187 | ||
088067f4 JK |
188 | return retry ? -IPSET_ERR_FIND_TYPE : |
189 | __find_set_type_minmax(name, family, min, max, true); | |
a7b4f989 JK |
190 | } |
191 | ||
c15f1c83 JE |
192 | #define family_name(f) ((f) == NFPROTO_IPV4 ? "inet" : \ |
193 | (f) == NFPROTO_IPV6 ? "inet6" : "any") | |
a7b4f989 JK |
194 | |
195 | /* Register a set type structure. The type is identified by | |
196 | * the unique triple of name, family and revision. | |
197 | */ | |
198 | int | |
199 | ip_set_type_register(struct ip_set_type *type) | |
200 | { | |
201 | int ret = 0; | |
202 | ||
203 | if (type->protocol != IPSET_PROTOCOL) { | |
b167a37c JP |
204 | pr_warn("ip_set type %s, family %s, revision %u:%u uses wrong protocol version %u (want %u)\n", |
205 | type->name, family_name(type->family), | |
206 | type->revision_min, type->revision_max, | |
207 | type->protocol, IPSET_PROTOCOL); | |
a7b4f989 JK |
208 | return -EINVAL; |
209 | } | |
210 | ||
211 | ip_set_type_lock(); | |
f1e00b39 | 212 | if (find_set_type(type->name, type->family, type->revision_min)) { |
a7b4f989 | 213 | /* Duplicate! */ |
b167a37c JP |
214 | pr_warn("ip_set type %s, family %s with revision min %u already registered!\n", |
215 | type->name, family_name(type->family), | |
216 | type->revision_min); | |
b57b2d1f JK |
217 | ip_set_type_unlock(); |
218 | return -EINVAL; | |
a7b4f989 JK |
219 | } |
220 | list_add_rcu(&type->list, &ip_set_type_list); | |
f1e00b39 JK |
221 | pr_debug("type %s, family %s, revision %u:%u registered.\n", |
222 | type->name, family_name(type->family), | |
223 | type->revision_min, type->revision_max); | |
a7b4f989 | 224 | ip_set_type_unlock(); |
b57b2d1f | 225 | |
a7b4f989 JK |
226 | return ret; |
227 | } | |
228 | EXPORT_SYMBOL_GPL(ip_set_type_register); | |
229 | ||
230 | /* Unregister a set type. There's a small race with ip_set_create */ | |
231 | void | |
232 | ip_set_type_unregister(struct ip_set_type *type) | |
233 | { | |
234 | ip_set_type_lock(); | |
f1e00b39 | 235 | if (!find_set_type(type->name, type->family, type->revision_min)) { |
b167a37c JP |
236 | pr_warn("ip_set type %s, family %s with revision min %u not registered\n", |
237 | type->name, family_name(type->family), | |
238 | type->revision_min); | |
b57b2d1f JK |
239 | ip_set_type_unlock(); |
240 | return; | |
a7b4f989 JK |
241 | } |
242 | list_del_rcu(&type->list); | |
f1e00b39 JK |
243 | pr_debug("type %s, family %s with revision min %u unregistered.\n", |
244 | type->name, family_name(type->family), type->revision_min); | |
a7b4f989 JK |
245 | ip_set_type_unlock(); |
246 | ||
247 | synchronize_rcu(); | |
248 | } | |
249 | EXPORT_SYMBOL_GPL(ip_set_type_unregister); | |
250 | ||
251 | /* Utility functions */ | |
252 | void * | |
253 | ip_set_alloc(size_t size) | |
254 | { | |
9446ab34 | 255 | return kvzalloc(size, GFP_KERNEL_ACCOUNT); |
a7b4f989 JK |
256 | } |
257 | EXPORT_SYMBOL_GPL(ip_set_alloc); | |
258 | ||
259 | void | |
260 | ip_set_free(void *members) | |
261 | { | |
262 | pr_debug("%p: free with %s\n", members, | |
263 | is_vmalloc_addr(members) ? "vfree" : "kfree"); | |
4cb28970 | 264 | kvfree(members); |
a7b4f989 JK |
265 | } |
266 | EXPORT_SYMBOL_GPL(ip_set_free); | |
267 | ||
8dea982a | 268 | static bool |
a7b4f989 JK |
269 | flag_nested(const struct nlattr *nla) |
270 | { | |
271 | return nla->nla_type & NLA_F_NESTED; | |
272 | } | |
273 | ||
274 | static const struct nla_policy ipaddr_policy[IPSET_ATTR_IPADDR_MAX + 1] = { | |
275 | [IPSET_ATTR_IPADDR_IPV4] = { .type = NLA_U32 }, | |
68ad89de | 276 | [IPSET_ATTR_IPADDR_IPV6] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)), |
a7b4f989 JK |
277 | }; |
278 | ||
279 | int | |
280 | ip_set_get_ipaddr4(struct nlattr *nla, __be32 *ipaddr) | |
281 | { | |
ca0f6a5c | 282 | struct nlattr *tb[IPSET_ATTR_IPADDR_MAX + 1]; |
a7b4f989 JK |
283 | |
284 | if (unlikely(!flag_nested(nla))) | |
285 | return -IPSET_ERR_PROTOCOL; | |
12899756 JK |
286 | if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, |
287 | ipaddr_policy, NULL)) | |
a7b4f989 JK |
288 | return -IPSET_ERR_PROTOCOL; |
289 | if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV4))) | |
290 | return -IPSET_ERR_PROTOCOL; | |
291 | ||
292 | *ipaddr = nla_get_be32(tb[IPSET_ATTR_IPADDR_IPV4]); | |
293 | return 0; | |
294 | } | |
295 | EXPORT_SYMBOL_GPL(ip_set_get_ipaddr4); | |
296 | ||
297 | int | |
298 | ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr) | |
299 | { | |
ca0f6a5c | 300 | struct nlattr *tb[IPSET_ATTR_IPADDR_MAX + 1]; |
a7b4f989 JK |
301 | |
302 | if (unlikely(!flag_nested(nla))) | |
303 | return -IPSET_ERR_PROTOCOL; | |
304 | ||
12899756 JK |
305 | if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, |
306 | ipaddr_policy, NULL)) | |
a7b4f989 JK |
307 | return -IPSET_ERR_PROTOCOL; |
308 | if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV6))) | |
309 | return -IPSET_ERR_PROTOCOL; | |
310 | ||
311 | memcpy(ipaddr, nla_data(tb[IPSET_ATTR_IPADDR_IPV6]), | |
ca0f6a5c | 312 | sizeof(struct in6_addr)); |
a7b4f989 JK |
313 | return 0; |
314 | } | |
315 | EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6); | |
316 | ||
2398a976 JS |
317 | static u32 |
318 | ip_set_timeout_get(const unsigned long *timeout) | |
319 | { | |
320 | u32 t; | |
321 | ||
322 | if (*timeout == IPSET_ELEM_PERMANENT) | |
323 | return 0; | |
324 | ||
325 | t = jiffies_to_msecs(*timeout - jiffies) / MSEC_PER_SEC; | |
326 | /* Zero value in userspace means no timeout */ | |
327 | return t == 0 ? 1 : t; | |
328 | } | |
329 | ||
94177f6e JS |
330 | static char * |
331 | ip_set_comment_uget(struct nlattr *tb) | |
332 | { | |
333 | return nla_data(tb); | |
334 | } | |
335 | ||
336 | /* Called from uadd only, protected by the set spinlock. | |
337 | * The kadt functions don't use the comment extensions in any way. | |
338 | */ | |
339 | void | |
340 | ip_set_init_comment(struct ip_set *set, struct ip_set_comment *comment, | |
341 | const struct ip_set_ext *ext) | |
342 | { | |
343 | struct ip_set_comment_rcu *c = rcu_dereference_protected(comment->c, 1); | |
344 | size_t len = ext->comment ? strlen(ext->comment) : 0; | |
345 | ||
346 | if (unlikely(c)) { | |
347 | set->ext_size -= sizeof(*c) + strlen(c->str) + 1; | |
348 | kfree_rcu(c, rcu); | |
349 | rcu_assign_pointer(comment->c, NULL); | |
350 | } | |
351 | if (!len) | |
352 | return; | |
353 | if (unlikely(len > IPSET_MAX_COMMENT_SIZE)) | |
354 | len = IPSET_MAX_COMMENT_SIZE; | |
355 | c = kmalloc(sizeof(*c) + len + 1, GFP_ATOMIC); | |
356 | if (unlikely(!c)) | |
357 | return; | |
8556bceb | 358 | strscpy(c->str, ext->comment, len + 1); |
94177f6e JS |
359 | set->ext_size += sizeof(*c) + strlen(c->str) + 1; |
360 | rcu_assign_pointer(comment->c, c); | |
361 | } | |
362 | EXPORT_SYMBOL_GPL(ip_set_init_comment); | |
363 | ||
364 | /* Used only when dumping a set, protected by rcu_read_lock() */ | |
365 | static int | |
366 | ip_set_put_comment(struct sk_buff *skb, const struct ip_set_comment *comment) | |
367 | { | |
368 | struct ip_set_comment_rcu *c = rcu_dereference(comment->c); | |
369 | ||
370 | if (!c) | |
371 | return 0; | |
372 | return nla_put_string(skb, IPSET_ATTR_COMMENT, c->str); | |
373 | } | |
374 | ||
375 | /* Called from uadd/udel, flush or the garbage collectors protected | |
376 | * by the set spinlock. | |
377 | * Called when the set is destroyed and when there can't be any user | |
378 | * of the set data anymore. | |
379 | */ | |
380 | static void | |
381 | ip_set_comment_free(struct ip_set *set, void *ptr) | |
382 | { | |
383 | struct ip_set_comment *comment = ptr; | |
384 | struct ip_set_comment_rcu *c; | |
385 | ||
386 | c = rcu_dereference_protected(comment->c, 1); | |
387 | if (unlikely(!c)) | |
388 | return; | |
389 | set->ext_size -= sizeof(*c) + strlen(c->str) + 1; | |
390 | kfree_rcu(c, rcu); | |
391 | rcu_assign_pointer(comment->c, NULL); | |
392 | } | |
393 | ||
9e41f26a | 394 | typedef void (*destroyer)(struct ip_set *, void *); |
03c8b234 JK |
395 | /* ipset data extension types, in size order */ |
396 | ||
397 | const struct ip_set_ext_type ip_set_extensions[] = { | |
398 | [IPSET_EXT_ID_COUNTER] = { | |
399 | .type = IPSET_EXT_COUNTER, | |
400 | .flag = IPSET_FLAG_WITH_COUNTERS, | |
401 | .len = sizeof(struct ip_set_counter), | |
402 | .align = __alignof__(struct ip_set_counter), | |
403 | }, | |
404 | [IPSET_EXT_ID_TIMEOUT] = { | |
405 | .type = IPSET_EXT_TIMEOUT, | |
406 | .len = sizeof(unsigned long), | |
407 | .align = __alignof__(unsigned long), | |
408 | }, | |
0e9871e3 AD |
409 | [IPSET_EXT_ID_SKBINFO] = { |
410 | .type = IPSET_EXT_SKBINFO, | |
411 | .flag = IPSET_FLAG_WITH_SKBINFO, | |
412 | .len = sizeof(struct ip_set_skbinfo), | |
413 | .align = __alignof__(struct ip_set_skbinfo), | |
414 | }, | |
68b63f08 OS |
415 | [IPSET_EXT_ID_COMMENT] = { |
416 | .type = IPSET_EXT_COMMENT | IPSET_EXT_DESTROY, | |
417 | .flag = IPSET_FLAG_WITH_COMMENT, | |
418 | .len = sizeof(struct ip_set_comment), | |
419 | .align = __alignof__(struct ip_set_comment), | |
94177f6e | 420 | .destroy = ip_set_comment_free, |
68b63f08 | 421 | }, |
03c8b234 JK |
422 | }; |
423 | EXPORT_SYMBOL_GPL(ip_set_extensions); | |
424 | ||
8dea982a | 425 | static bool |
03c8b234 JK |
426 | add_extension(enum ip_set_ext_id id, u32 flags, struct nlattr *tb[]) |
427 | { | |
428 | return ip_set_extensions[id].flag ? | |
429 | (flags & ip_set_extensions[id].flag) : | |
430 | !!tb[IPSET_ATTR_TIMEOUT]; | |
431 | } | |
432 | ||
433 | size_t | |
95ad1f4a JK |
434 | ip_set_elem_len(struct ip_set *set, struct nlattr *tb[], size_t len, |
435 | size_t align) | |
03c8b234 JK |
436 | { |
437 | enum ip_set_ext_id id; | |
03c8b234 JK |
438 | u32 cadt_flags = 0; |
439 | ||
440 | if (tb[IPSET_ATTR_CADT_FLAGS]) | |
441 | cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); | |
07cf8f5a JH |
442 | if (cadt_flags & IPSET_FLAG_WITH_FORCEADD) |
443 | set->flags |= IPSET_CREATE_FLAG_FORCEADD; | |
95ad1f4a JK |
444 | if (!align) |
445 | align = 1; | |
03c8b234 JK |
446 | for (id = 0; id < IPSET_EXT_ID_MAX; id++) { |
447 | if (!add_extension(id, cadt_flags, tb)) | |
448 | continue; | |
71502846 RK |
449 | if (align < ip_set_extensions[id].align) |
450 | align = ip_set_extensions[id].align; | |
95ad1f4a JK |
451 | len = ALIGN(len, ip_set_extensions[id].align); |
452 | set->offset[id] = len; | |
03c8b234 | 453 | set->extensions |= ip_set_extensions[id].type; |
95ad1f4a | 454 | len += ip_set_extensions[id].len; |
03c8b234 | 455 | } |
95ad1f4a | 456 | return ALIGN(len, align); |
03c8b234 JK |
457 | } |
458 | EXPORT_SYMBOL_GPL(ip_set_elem_len); | |
459 | ||
075e64c0 JK |
460 | int |
461 | ip_set_get_extensions(struct ip_set *set, struct nlattr *tb[], | |
462 | struct ip_set_ext *ext) | |
463 | { | |
0e9871e3 | 464 | u64 fullmark; |
7dd37bc8 SP |
465 | |
466 | if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || | |
467 | !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) || | |
468 | !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) || | |
469 | !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) || | |
470 | !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) || | |
471 | !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE))) | |
472 | return -IPSET_ERR_PROTOCOL; | |
473 | ||
075e64c0 | 474 | if (tb[IPSET_ATTR_TIMEOUT]) { |
edda0791 | 475 | if (!SET_WITH_TIMEOUT(set)) |
075e64c0 JK |
476 | return -IPSET_ERR_TIMEOUT; |
477 | ext->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); | |
478 | } | |
34d666d4 | 479 | if (tb[IPSET_ATTR_BYTES] || tb[IPSET_ATTR_PACKETS]) { |
edda0791 | 480 | if (!SET_WITH_COUNTER(set)) |
34d666d4 JK |
481 | return -IPSET_ERR_COUNTER; |
482 | if (tb[IPSET_ATTR_BYTES]) | |
483 | ext->bytes = be64_to_cpu(nla_get_be64( | |
484 | tb[IPSET_ATTR_BYTES])); | |
485 | if (tb[IPSET_ATTR_PACKETS]) | |
486 | ext->packets = be64_to_cpu(nla_get_be64( | |
487 | tb[IPSET_ATTR_PACKETS])); | |
488 | } | |
68b63f08 | 489 | if (tb[IPSET_ATTR_COMMENT]) { |
edda0791 | 490 | if (!SET_WITH_COMMENT(set)) |
68b63f08 OS |
491 | return -IPSET_ERR_COMMENT; |
492 | ext->comment = ip_set_comment_uget(tb[IPSET_ATTR_COMMENT]); | |
493 | } | |
0e9871e3 | 494 | if (tb[IPSET_ATTR_SKBMARK]) { |
edda0791 | 495 | if (!SET_WITH_SKBINFO(set)) |
0e9871e3 AD |
496 | return -IPSET_ERR_SKBINFO; |
497 | fullmark = be64_to_cpu(nla_get_be64(tb[IPSET_ATTR_SKBMARK])); | |
bec810d9 JK |
498 | ext->skbinfo.skbmark = fullmark >> 32; |
499 | ext->skbinfo.skbmarkmask = fullmark & 0xffffffff; | |
0e9871e3 AD |
500 | } |
501 | if (tb[IPSET_ATTR_SKBPRIO]) { | |
edda0791 | 502 | if (!SET_WITH_SKBINFO(set)) |
0e9871e3 | 503 | return -IPSET_ERR_SKBINFO; |
bec810d9 JK |
504 | ext->skbinfo.skbprio = |
505 | be32_to_cpu(nla_get_be32(tb[IPSET_ATTR_SKBPRIO])); | |
0e9871e3 AD |
506 | } |
507 | if (tb[IPSET_ATTR_SKBQUEUE]) { | |
edda0791 | 508 | if (!SET_WITH_SKBINFO(set)) |
0e9871e3 | 509 | return -IPSET_ERR_SKBINFO; |
bec810d9 JK |
510 | ext->skbinfo.skbqueue = |
511 | be16_to_cpu(nla_get_be16(tb[IPSET_ATTR_SKBQUEUE])); | |
0e9871e3 | 512 | } |
075e64c0 JK |
513 | return 0; |
514 | } | |
515 | EXPORT_SYMBOL_GPL(ip_set_get_extensions); | |
516 | ||
2398a976 JS |
517 | static u64 |
518 | ip_set_get_bytes(const struct ip_set_counter *counter) | |
519 | { | |
520 | return (u64)atomic64_read(&(counter)->bytes); | |
521 | } | |
522 | ||
523 | static u64 | |
524 | ip_set_get_packets(const struct ip_set_counter *counter) | |
525 | { | |
526 | return (u64)atomic64_read(&(counter)->packets); | |
527 | } | |
528 | ||
529 | static bool | |
530 | ip_set_put_counter(struct sk_buff *skb, const struct ip_set_counter *counter) | |
531 | { | |
532 | return nla_put_net64(skb, IPSET_ATTR_BYTES, | |
533 | cpu_to_be64(ip_set_get_bytes(counter)), | |
534 | IPSET_ATTR_PAD) || | |
535 | nla_put_net64(skb, IPSET_ATTR_PACKETS, | |
536 | cpu_to_be64(ip_set_get_packets(counter)), | |
537 | IPSET_ATTR_PAD); | |
538 | } | |
539 | ||
540 | static bool | |
541 | ip_set_put_skbinfo(struct sk_buff *skb, const struct ip_set_skbinfo *skbinfo) | |
542 | { | |
543 | /* Send nonzero parameters only */ | |
544 | return ((skbinfo->skbmark || skbinfo->skbmarkmask) && | |
545 | nla_put_net64(skb, IPSET_ATTR_SKBMARK, | |
546 | cpu_to_be64((u64)skbinfo->skbmark << 32 | | |
547 | skbinfo->skbmarkmask), | |
548 | IPSET_ATTR_PAD)) || | |
549 | (skbinfo->skbprio && | |
550 | nla_put_net32(skb, IPSET_ATTR_SKBPRIO, | |
551 | cpu_to_be32(skbinfo->skbprio))) || | |
552 | (skbinfo->skbqueue && | |
553 | nla_put_net16(skb, IPSET_ATTR_SKBQUEUE, | |
554 | cpu_to_be16(skbinfo->skbqueue))); | |
555 | } | |
556 | ||
a3b1c1eb DV |
557 | int |
558 | ip_set_put_extensions(struct sk_buff *skb, const struct ip_set *set, | |
559 | const void *e, bool active) | |
560 | { | |
561 | if (SET_WITH_TIMEOUT(set)) { | |
562 | unsigned long *timeout = ext_timeout(e, set); | |
563 | ||
564 | if (nla_put_net32(skb, IPSET_ATTR_TIMEOUT, | |
565 | htonl(active ? ip_set_timeout_get(timeout) | |
566 | : *timeout))) | |
567 | return -EMSGSIZE; | |
568 | } | |
569 | if (SET_WITH_COUNTER(set) && | |
570 | ip_set_put_counter(skb, ext_counter(e, set))) | |
571 | return -EMSGSIZE; | |
572 | if (SET_WITH_COMMENT(set) && | |
573 | ip_set_put_comment(skb, ext_comment(e, set))) | |
574 | return -EMSGSIZE; | |
575 | if (SET_WITH_SKBINFO(set) && | |
576 | ip_set_put_skbinfo(skb, ext_skbinfo(e, set))) | |
577 | return -EMSGSIZE; | |
578 | return 0; | |
579 | } | |
580 | EXPORT_SYMBOL_GPL(ip_set_put_extensions); | |
581 | ||
2398a976 JS |
582 | static bool |
583 | ip_set_match_counter(u64 counter, u64 match, u8 op) | |
584 | { | |
585 | switch (op) { | |
586 | case IPSET_COUNTER_NONE: | |
587 | return true; | |
588 | case IPSET_COUNTER_EQ: | |
589 | return counter == match; | |
590 | case IPSET_COUNTER_NE: | |
591 | return counter != match; | |
592 | case IPSET_COUNTER_LT: | |
593 | return counter < match; | |
594 | case IPSET_COUNTER_GT: | |
595 | return counter > match; | |
596 | } | |
597 | return false; | |
598 | } | |
599 | ||
600 | static void | |
601 | ip_set_add_bytes(u64 bytes, struct ip_set_counter *counter) | |
602 | { | |
603 | atomic64_add((long long)bytes, &(counter)->bytes); | |
604 | } | |
605 | ||
606 | static void | |
607 | ip_set_add_packets(u64 packets, struct ip_set_counter *counter) | |
608 | { | |
609 | atomic64_add((long long)packets, &(counter)->packets); | |
610 | } | |
611 | ||
612 | static void | |
613 | ip_set_update_counter(struct ip_set_counter *counter, | |
614 | const struct ip_set_ext *ext, u32 flags) | |
615 | { | |
616 | if (ext->packets != ULLONG_MAX && | |
617 | !(flags & IPSET_FLAG_SKIP_COUNTER_UPDATE)) { | |
618 | ip_set_add_bytes(ext->bytes, counter); | |
619 | ip_set_add_packets(ext->packets, counter); | |
620 | } | |
621 | } | |
622 | ||
623 | static void | |
624 | ip_set_get_skbinfo(struct ip_set_skbinfo *skbinfo, | |
625 | const struct ip_set_ext *ext, | |
626 | struct ip_set_ext *mext, u32 flags) | |
627 | { | |
628 | mext->skbinfo = *skbinfo; | |
629 | } | |
630 | ||
4750005a JK |
631 | bool |
632 | ip_set_match_extensions(struct ip_set *set, const struct ip_set_ext *ext, | |
633 | struct ip_set_ext *mext, u32 flags, void *data) | |
634 | { | |
635 | if (SET_WITH_TIMEOUT(set) && | |
636 | ip_set_timeout_expired(ext_timeout(data, set))) | |
637 | return false; | |
638 | if (SET_WITH_COUNTER(set)) { | |
639 | struct ip_set_counter *counter = ext_counter(data, set); | |
640 | ||
7d10e62c SB |
641 | ip_set_update_counter(counter, ext, flags); |
642 | ||
4750005a JK |
643 | if (flags & IPSET_FLAG_MATCH_COUNTERS && |
644 | !(ip_set_match_counter(ip_set_get_packets(counter), | |
645 | mext->packets, mext->packets_op) && | |
646 | ip_set_match_counter(ip_set_get_bytes(counter), | |
647 | mext->bytes, mext->bytes_op))) | |
648 | return false; | |
4750005a JK |
649 | } |
650 | if (SET_WITH_SKBINFO(set)) | |
651 | ip_set_get_skbinfo(ext_skbinfo(data, set), | |
652 | ext, mext, flags); | |
653 | return true; | |
654 | } | |
655 | EXPORT_SYMBOL_GPL(ip_set_match_extensions); | |
656 | ||
ca0f6a5c | 657 | /* Creating/destroying/renaming/swapping affect the existence and |
a7b4f989 JK |
658 | * the properties of a set. All of these can be executed from userspace |
659 | * only and serialized by the nfnl mutex indirectly from nfnetlink. | |
660 | * | |
661 | * Sets are identified by their index in ip_set_list and the index | |
662 | * is used by the external references (set/SET netfilter modules). | |
663 | * | |
664 | * The set behind an index may change by swapping only, from userspace. | |
665 | */ | |
666 | ||
8dea982a | 667 | static void |
9076aea7 | 668 | __ip_set_get(struct ip_set *set) |
a7b4f989 | 669 | { |
2f9f28b2 | 670 | write_lock_bh(&ip_set_ref_lock); |
9076aea7 | 671 | set->ref++; |
2f9f28b2 | 672 | write_unlock_bh(&ip_set_ref_lock); |
a7b4f989 JK |
673 | } |
674 | ||
8dea982a | 675 | static void |
9076aea7 | 676 | __ip_set_put(struct ip_set *set) |
a7b4f989 | 677 | { |
2f9f28b2 | 678 | write_lock_bh(&ip_set_ref_lock); |
9076aea7 JK |
679 | BUG_ON(set->ref == 0); |
680 | set->ref--; | |
2f9f28b2 | 681 | write_unlock_bh(&ip_set_ref_lock); |
a7b4f989 JK |
682 | } |
683 | ||
596cf3fe VP |
684 | /* set->ref can be swapped out by ip_set_swap, netlink events (like dump) need |
685 | * a separate reference counter | |
686 | */ | |
7433b6d2 JK |
687 | static void |
688 | __ip_set_get_netlink(struct ip_set *set) | |
689 | { | |
690 | write_lock_bh(&ip_set_ref_lock); | |
691 | set->ref_netlink++; | |
692 | write_unlock_bh(&ip_set_ref_lock); | |
693 | } | |
694 | ||
8dea982a | 695 | static void |
596cf3fe VP |
696 | __ip_set_put_netlink(struct ip_set *set) |
697 | { | |
698 | write_lock_bh(&ip_set_ref_lock); | |
699 | BUG_ON(set->ref_netlink == 0); | |
700 | set->ref_netlink--; | |
701 | write_unlock_bh(&ip_set_ref_lock); | |
702 | } | |
703 | ||
ca0f6a5c | 704 | /* Add, del and test set entries from kernel. |
a7b4f989 JK |
705 | * |
706 | * The set behind the index must exist and must be referenced | |
707 | * so it can't be destroyed (or changed) under our foot. | |
708 | */ | |
709 | ||
8dea982a | 710 | static struct ip_set * |
1785e8f4 | 711 | ip_set_rcu_get(struct net *net, ip_set_id_t index) |
9076aea7 | 712 | { |
1785e8f4 | 713 | struct ip_set_net *inst = ip_set_pernet(net); |
9076aea7 | 714 | |
28628fa9 JK |
715 | /* ip_set_list and the set pointer need to be protected */ |
716 | return ip_set_dereference_nfnl(inst->ip_set_list)[index]; | |
9076aea7 JK |
717 | } |
718 | ||
f66ee041 JK |
719 | static inline void |
720 | ip_set_lock(struct ip_set *set) | |
721 | { | |
722 | if (!set->variant->region_lock) | |
723 | spin_lock_bh(&set->lock); | |
724 | } | |
725 | ||
726 | static inline void | |
727 | ip_set_unlock(struct ip_set *set) | |
728 | { | |
729 | if (!set->variant->region_lock) | |
730 | spin_unlock_bh(&set->lock); | |
731 | } | |
732 | ||
a7b4f989 JK |
733 | int |
734 | ip_set_test(ip_set_id_t index, const struct sk_buff *skb, | |
075e64c0 | 735 | const struct xt_action_param *par, struct ip_set_adt_opt *opt) |
a7b4f989 | 736 | { |
613dbd95 | 737 | struct ip_set *set = ip_set_rcu_get(xt_net(par), index); |
a7b4f989 JK |
738 | int ret = 0; |
739 | ||
ca0f6a5c | 740 | BUG_ON(!set); |
a7b4f989 JK |
741 | pr_debug("set %s, index %u\n", set->name, index); |
742 | ||
ac8cc925 | 743 | if (opt->dim < set->type->dimension || |
c15f1c83 | 744 | !(opt->family == set->family || set->family == NFPROTO_UNSPEC)) |
a7b4f989 JK |
745 | return 0; |
746 | ||
b66554cf | 747 | ret = set->variant->kadt(set, skb, par, IPSET_TEST, opt); |
a7b4f989 JK |
748 | |
749 | if (ret == -EAGAIN) { | |
750 | /* Type requests element to be completed */ | |
1a84db56 | 751 | pr_debug("element must be completed, ADD is triggered\n"); |
f66ee041 | 752 | ip_set_lock(set); |
b66554cf | 753 | set->variant->kadt(set, skb, par, IPSET_ADD, opt); |
f66ee041 | 754 | ip_set_unlock(set); |
a7b4f989 | 755 | ret = 1; |
3e0304a5 JK |
756 | } else { |
757 | /* --return-nomatch: invert matched element */ | |
6e01781d | 758 | if ((opt->cmdflags & IPSET_FLAG_RETURN_NOMATCH) && |
3e0304a5 JK |
759 | (set->type->features & IPSET_TYPE_NOMATCH) && |
760 | (ret > 0 || ret == -ENOTEMPTY)) | |
761 | ret = -ret; | |
a7b4f989 JK |
762 | } |
763 | ||
764 | /* Convert error codes to nomatch */ | |
765 | return (ret < 0 ? 0 : ret); | |
766 | } | |
767 | EXPORT_SYMBOL_GPL(ip_set_test); | |
768 | ||
769 | int | |
770 | ip_set_add(ip_set_id_t index, const struct sk_buff *skb, | |
075e64c0 | 771 | const struct xt_action_param *par, struct ip_set_adt_opt *opt) |
a7b4f989 | 772 | { |
613dbd95 | 773 | struct ip_set *set = ip_set_rcu_get(xt_net(par), index); |
a7b4f989 JK |
774 | int ret; |
775 | ||
ca0f6a5c | 776 | BUG_ON(!set); |
a7b4f989 JK |
777 | pr_debug("set %s, index %u\n", set->name, index); |
778 | ||
ac8cc925 | 779 | if (opt->dim < set->type->dimension || |
c15f1c83 | 780 | !(opt->family == set->family || set->family == NFPROTO_UNSPEC)) |
35f6e63a | 781 | return -IPSET_ERR_TYPE_MISMATCH; |
a7b4f989 | 782 | |
f66ee041 | 783 | ip_set_lock(set); |
b66554cf | 784 | ret = set->variant->kadt(set, skb, par, IPSET_ADD, opt); |
f66ee041 | 785 | ip_set_unlock(set); |
a7b4f989 JK |
786 | |
787 | return ret; | |
788 | } | |
789 | EXPORT_SYMBOL_GPL(ip_set_add); | |
790 | ||
791 | int | |
792 | ip_set_del(ip_set_id_t index, const struct sk_buff *skb, | |
075e64c0 | 793 | const struct xt_action_param *par, struct ip_set_adt_opt *opt) |
a7b4f989 | 794 | { |
613dbd95 | 795 | struct ip_set *set = ip_set_rcu_get(xt_net(par), index); |
a7b4f989 JK |
796 | int ret = 0; |
797 | ||
ca0f6a5c | 798 | BUG_ON(!set); |
a7b4f989 JK |
799 | pr_debug("set %s, index %u\n", set->name, index); |
800 | ||
ac8cc925 | 801 | if (opt->dim < set->type->dimension || |
c15f1c83 | 802 | !(opt->family == set->family || set->family == NFPROTO_UNSPEC)) |
35f6e63a | 803 | return -IPSET_ERR_TYPE_MISMATCH; |
a7b4f989 | 804 | |
f66ee041 | 805 | ip_set_lock(set); |
b66554cf | 806 | ret = set->variant->kadt(set, skb, par, IPSET_DEL, opt); |
f66ee041 | 807 | ip_set_unlock(set); |
a7b4f989 JK |
808 | |
809 | return ret; | |
810 | } | |
811 | EXPORT_SYMBOL_GPL(ip_set_del); | |
812 | ||
ca0f6a5c | 813 | /* Find set by name, reference it once. The reference makes sure the |
a7b4f989 JK |
814 | * thing pointed to, does not go away under our feet. |
815 | * | |
a7b4f989 JK |
816 | */ |
817 | ip_set_id_t | |
1785e8f4 | 818 | ip_set_get_byname(struct net *net, const char *name, struct ip_set **set) |
a7b4f989 JK |
819 | { |
820 | ip_set_id_t i, index = IPSET_INVALID_ID; | |
821 | struct ip_set *s; | |
1785e8f4 | 822 | struct ip_set_net *inst = ip_set_pernet(net); |
a7b4f989 | 823 | |
9076aea7 | 824 | rcu_read_lock(); |
1785e8f4 VL |
825 | for (i = 0; i < inst->ip_set_max; i++) { |
826 | s = rcu_dereference(inst->ip_set_list)[i]; | |
ca0f6a5c | 827 | if (s && STRNCMP(s->name, name)) { |
9076aea7 | 828 | __ip_set_get(s); |
a7b4f989 JK |
829 | index = i; |
830 | *set = s; | |
9076aea7 | 831 | break; |
a7b4f989 JK |
832 | } |
833 | } | |
9076aea7 | 834 | rcu_read_unlock(); |
a7b4f989 JK |
835 | |
836 | return index; | |
837 | } | |
838 | EXPORT_SYMBOL_GPL(ip_set_get_byname); | |
839 | ||
ca0f6a5c | 840 | /* If the given set pointer points to a valid set, decrement |
a7b4f989 JK |
841 | * reference count by 1. The caller shall not assume the index |
842 | * to be valid, after calling this function. | |
843 | * | |
a7b4f989 | 844 | */ |
1785e8f4 | 845 | |
8dea982a | 846 | static void |
1785e8f4 | 847 | __ip_set_put_byindex(struct ip_set_net *inst, ip_set_id_t index) |
a7b4f989 | 848 | { |
9076aea7 JK |
849 | struct ip_set *set; |
850 | ||
851 | rcu_read_lock(); | |
1785e8f4 | 852 | set = rcu_dereference(inst->ip_set_list)[index]; |
ca0f6a5c | 853 | if (set) |
9076aea7 JK |
854 | __ip_set_put(set); |
855 | rcu_read_unlock(); | |
a7b4f989 | 856 | } |
1785e8f4 VL |
857 | |
858 | void | |
859 | ip_set_put_byindex(struct net *net, ip_set_id_t index) | |
860 | { | |
861 | struct ip_set_net *inst = ip_set_pernet(net); | |
862 | ||
863 | __ip_set_put_byindex(inst, index); | |
864 | } | |
a7b4f989 JK |
865 | EXPORT_SYMBOL_GPL(ip_set_put_byindex); |
866 | ||
ca0f6a5c | 867 | /* Get the name of a set behind a set index. |
439cd39e SB |
868 | * Set itself is protected by RCU, but its name isn't: to protect against |
869 | * renaming, grab ip_set_ref_lock as reader (see ip_set_rename()) and copy the | |
870 | * name. | |
a7b4f989 | 871 | */ |
439cd39e SB |
872 | void |
873 | ip_set_name_byindex(struct net *net, ip_set_id_t index, char *name) | |
a7b4f989 | 874 | { |
439cd39e | 875 | struct ip_set *set = ip_set_rcu_get(net, index); |
a7b4f989 | 876 | |
ca0f6a5c | 877 | BUG_ON(!set); |
a7b4f989 | 878 | |
439cd39e | 879 | read_lock_bh(&ip_set_ref_lock); |
e5331403 | 880 | strscpy_pad(name, set->name, IPSET_MAXNAMELEN); |
439cd39e | 881 | read_unlock_bh(&ip_set_ref_lock); |
a7b4f989 JK |
882 | } |
883 | EXPORT_SYMBOL_GPL(ip_set_name_byindex); | |
884 | ||
ca0f6a5c | 885 | /* Routines to call by external subsystems, which do not |
a7b4f989 JK |
886 | * call nfnl_lock for us. |
887 | */ | |
888 | ||
ca0f6a5c | 889 | /* Find set by index, reference it once. The reference makes sure the |
a7b4f989 JK |
890 | * thing pointed to, does not go away under our feet. |
891 | * | |
892 | * The nfnl mutex is used in the function. | |
893 | */ | |
894 | ip_set_id_t | |
1785e8f4 | 895 | ip_set_nfnl_get_byindex(struct net *net, ip_set_id_t index) |
a7b4f989 | 896 | { |
9076aea7 | 897 | struct ip_set *set; |
1785e8f4 | 898 | struct ip_set_net *inst = ip_set_pernet(net); |
9076aea7 | 899 | |
0f9f5e1b | 900 | if (index >= inst->ip_set_max) |
a7b4f989 JK |
901 | return IPSET_INVALID_ID; |
902 | ||
c14b78e7 | 903 | nfnl_lock(NFNL_SUBSYS_IPSET); |
3e90ebd3 | 904 | set = ip_set(inst, index); |
9076aea7 JK |
905 | if (set) |
906 | __ip_set_get(set); | |
a7b4f989 JK |
907 | else |
908 | index = IPSET_INVALID_ID; | |
c14b78e7 | 909 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
a7b4f989 JK |
910 | |
911 | return index; | |
912 | } | |
913 | EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex); | |
914 | ||
ca0f6a5c | 915 | /* If the given set pointer points to a valid set, decrement |
a7b4f989 JK |
916 | * reference count by 1. The caller shall not assume the index |
917 | * to be valid, after calling this function. | |
918 | * | |
919 | * The nfnl mutex is used in the function. | |
920 | */ | |
921 | void | |
1785e8f4 | 922 | ip_set_nfnl_put(struct net *net, ip_set_id_t index) |
a7b4f989 | 923 | { |
9076aea7 | 924 | struct ip_set *set; |
1785e8f4 VL |
925 | struct ip_set_net *inst = ip_set_pernet(net); |
926 | ||
c14b78e7 | 927 | nfnl_lock(NFNL_SUBSYS_IPSET); |
1785e8f4 | 928 | if (!inst->is_deleted) { /* already deleted from ip_set_net_exit() */ |
3e90ebd3 | 929 | set = ip_set(inst, index); |
ca0f6a5c | 930 | if (set) |
1785e8f4 VL |
931 | __ip_set_put(set); |
932 | } | |
c14b78e7 | 933 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
a7b4f989 JK |
934 | } |
935 | EXPORT_SYMBOL_GPL(ip_set_nfnl_put); | |
936 | ||
ca0f6a5c | 937 | /* Communication protocol with userspace over netlink. |
a7b4f989 | 938 | * |
2f9f28b2 | 939 | * The commands are serialized by the nfnl mutex. |
a7b4f989 JK |
940 | */ |
941 | ||
23c42a40 JK |
942 | static inline u8 protocol(const struct nlattr * const tb[]) |
943 | { | |
944 | return nla_get_u8(tb[IPSET_ATTR_PROTOCOL]); | |
945 | } | |
946 | ||
a7b4f989 JK |
947 | static inline bool |
948 | protocol_failed(const struct nlattr * const tb[]) | |
949 | { | |
23c42a40 JK |
950 | return !tb[IPSET_ATTR_PROTOCOL] || protocol(tb) != IPSET_PROTOCOL; |
951 | } | |
952 | ||
953 | static inline bool | |
954 | protocol_min_failed(const struct nlattr * const tb[]) | |
955 | { | |
956 | return !tb[IPSET_ATTR_PROTOCOL] || protocol(tb) < IPSET_PROTOCOL_MIN; | |
a7b4f989 JK |
957 | } |
958 | ||
959 | static inline u32 | |
960 | flag_exist(const struct nlmsghdr *nlh) | |
961 | { | |
962 | return nlh->nlmsg_flags & NLM_F_EXCL ? 0 : IPSET_FLAG_EXIST; | |
963 | } | |
964 | ||
965 | static struct nlmsghdr * | |
15e47304 | 966 | start_msg(struct sk_buff *skb, u32 portid, u32 seq, unsigned int flags, |
a7b4f989 JK |
967 | enum ipset_cmd cmd) |
968 | { | |
19c28b13 PNA |
969 | return nfnl_msg_put(skb, portid, seq, |
970 | nfnl_msg_type(NFNL_SUBSYS_IPSET, cmd), flags, | |
971 | NFPROTO_IPV4, NFNETLINK_V0, 0); | |
a7b4f989 JK |
972 | } |
973 | ||
974 | /* Create a set */ | |
975 | ||
976 | static const struct nla_policy ip_set_create_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
977 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
978 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, | |
979 | .len = IPSET_MAXNAMELEN - 1 }, | |
980 | [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING, | |
981 | .len = IPSET_MAXNAMELEN - 1}, | |
982 | [IPSET_ATTR_REVISION] = { .type = NLA_U8 }, | |
983 | [IPSET_ATTR_FAMILY] = { .type = NLA_U8 }, | |
984 | [IPSET_ATTR_DATA] = { .type = NLA_NESTED }, | |
985 | }; | |
986 | ||
9076aea7 | 987 | static struct ip_set * |
1785e8f4 | 988 | find_set_and_id(struct ip_set_net *inst, const char *name, ip_set_id_t *id) |
a7b4f989 | 989 | { |
9076aea7 JK |
990 | struct ip_set *set = NULL; |
991 | ip_set_id_t i; | |
a7b4f989 | 992 | |
9076aea7 | 993 | *id = IPSET_INVALID_ID; |
1785e8f4 | 994 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 995 | set = ip_set(inst, i); |
ca0f6a5c | 996 | if (set && STRNCMP(set->name, name)) { |
9076aea7 JK |
997 | *id = i; |
998 | break; | |
999 | } | |
a7b4f989 | 1000 | } |
9076aea7 | 1001 | return (*id == IPSET_INVALID_ID ? NULL : set); |
a7b4f989 JK |
1002 | } |
1003 | ||
1004 | static inline struct ip_set * | |
1785e8f4 | 1005 | find_set(struct ip_set_net *inst, const char *name) |
a7b4f989 | 1006 | { |
9076aea7 | 1007 | ip_set_id_t id; |
a7b4f989 | 1008 | |
1785e8f4 | 1009 | return find_set_and_id(inst, name, &id); |
a7b4f989 JK |
1010 | } |
1011 | ||
1012 | static int | |
1785e8f4 VL |
1013 | find_free_id(struct ip_set_net *inst, const char *name, ip_set_id_t *index, |
1014 | struct ip_set **set) | |
a7b4f989 | 1015 | { |
9076aea7 | 1016 | struct ip_set *s; |
a7b4f989 JK |
1017 | ip_set_id_t i; |
1018 | ||
1019 | *index = IPSET_INVALID_ID; | |
1785e8f4 | 1020 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 1021 | s = ip_set(inst, i); |
ca0f6a5c | 1022 | if (!s) { |
a7b4f989 JK |
1023 | if (*index == IPSET_INVALID_ID) |
1024 | *index = i; | |
22496f09 | 1025 | } else if (STRNCMP(name, s->name)) { |
a7b4f989 | 1026 | /* Name clash */ |
9076aea7 | 1027 | *set = s; |
a7b4f989 JK |
1028 | return -EEXIST; |
1029 | } | |
1030 | } | |
1031 | if (*index == IPSET_INVALID_ID) | |
1032 | /* No free slot remained */ | |
1033 | return -IPSET_ERR_MAX_SETS; | |
1034 | return 0; | |
1035 | } | |
1036 | ||
a6555365 PNA |
1037 | static int ip_set_none(struct sk_buff *skb, const struct nfnl_info *info, |
1038 | const struct nlattr * const attr[]) | |
d31f4d44 TB |
1039 | { |
1040 | return -EOPNOTSUPP; | |
1041 | } | |
1042 | ||
a6555365 PNA |
1043 | static int ip_set_create(struct sk_buff *skb, const struct nfnl_info *info, |
1044 | const struct nlattr * const attr[]) | |
a7b4f989 | 1045 | { |
a6555365 | 1046 | struct ip_set_net *inst = ip_set_pernet(info->net); |
9846ada1 | 1047 | struct ip_set *set, *clash = NULL; |
a7b4f989 | 1048 | ip_set_id_t index = IPSET_INVALID_ID; |
ca0f6a5c | 1049 | struct nlattr *tb[IPSET_ATTR_CREATE_MAX + 1] = {}; |
a7b4f989 JK |
1050 | const char *name, *typename; |
1051 | u8 family, revision; | |
a6555365 | 1052 | u32 flags = flag_exist(info->nlh); |
a7b4f989 JK |
1053 | int ret = 0; |
1054 | ||
23c42a40 | 1055 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c JK |
1056 | !attr[IPSET_ATTR_SETNAME] || |
1057 | !attr[IPSET_ATTR_TYPENAME] || | |
1058 | !attr[IPSET_ATTR_REVISION] || | |
1059 | !attr[IPSET_ATTR_FAMILY] || | |
1060 | (attr[IPSET_ATTR_DATA] && | |
a7b4f989 JK |
1061 | !flag_nested(attr[IPSET_ATTR_DATA])))) |
1062 | return -IPSET_ERR_PROTOCOL; | |
1063 | ||
1064 | name = nla_data(attr[IPSET_ATTR_SETNAME]); | |
1065 | typename = nla_data(attr[IPSET_ATTR_TYPENAME]); | |
1066 | family = nla_get_u8(attr[IPSET_ATTR_FAMILY]); | |
1067 | revision = nla_get_u8(attr[IPSET_ATTR_REVISION]); | |
1068 | pr_debug("setname: %s, typename: %s, family: %s, revision: %u\n", | |
1069 | name, typename, family_name(family), revision); | |
1070 | ||
ca0f6a5c | 1071 | /* First, and without any locks, allocate and initialize |
a7b4f989 JK |
1072 | * a normal base set structure. |
1073 | */ | |
ca0f6a5c | 1074 | set = kzalloc(sizeof(*set), GFP_KERNEL); |
a7b4f989 JK |
1075 | if (!set) |
1076 | return -ENOMEM; | |
b57b2d1f | 1077 | spin_lock_init(&set->lock); |
8556bceb | 1078 | strscpy(set->name, name, IPSET_MAXNAMELEN); |
a7b4f989 | 1079 | set->family = family; |
f1e00b39 | 1080 | set->revision = revision; |
a7b4f989 | 1081 | |
ca0f6a5c | 1082 | /* Next, check that we know the type, and take |
a7b4f989 JK |
1083 | * a reference on the type, to make sure it stays available |
1084 | * while constructing our new set. | |
1085 | * | |
1086 | * After referencing the type, we try to create the type | |
1087 | * specific part of the set without holding any locks. | |
1088 | */ | |
ca0f6a5c | 1089 | ret = find_set_type_get(typename, family, revision, &set->type); |
a7b4f989 JK |
1090 | if (ret) |
1091 | goto out; | |
1092 | ||
ca0f6a5c | 1093 | /* Without holding any locks, create private part. */ |
a7b4f989 | 1094 | if (attr[IPSET_ATTR_DATA] && |
12899756 JK |
1095 | nla_parse_nested(tb, IPSET_ATTR_CREATE_MAX, attr[IPSET_ATTR_DATA], |
1096 | set->type->create_policy, NULL)) { | |
15b4d93f JK |
1097 | ret = -IPSET_ERR_PROTOCOL; |
1098 | goto put_out; | |
a7b4f989 | 1099 | } |
ccf0a4b7 JK |
1100 | /* Set create flags depending on the type revision */ |
1101 | set->flags |= set->type->create_flags[revision]; | |
a7b4f989 | 1102 | |
a6555365 | 1103 | ret = set->type->create(info->net, set, tb, flags); |
a7b4f989 JK |
1104 | if (ret != 0) |
1105 | goto put_out; | |
1106 | ||
1107 | /* BTW, ret==0 here. */ | |
1108 | ||
ca0f6a5c | 1109 | /* Here, we have a valid, constructed set and we are protected |
2f9f28b2 JK |
1110 | * by the nfnl mutex. Find the first free index in ip_set_list |
1111 | * and check clashing. | |
a7b4f989 | 1112 | */ |
1785e8f4 | 1113 | ret = find_free_id(inst, set->name, &index, &clash); |
9076aea7 | 1114 | if (ret == -EEXIST) { |
a7b4f989 | 1115 | /* If this is the same set and requested, ignore error */ |
9076aea7 | 1116 | if ((flags & IPSET_FLAG_EXIST) && |
22496f09 | 1117 | STRNCMP(set->type->name, clash->type->name) && |
a7b4f989 | 1118 | set->type->family == clash->type->family && |
f1e00b39 JK |
1119 | set->type->revision_min == clash->type->revision_min && |
1120 | set->type->revision_max == clash->type->revision_max && | |
a7b4f989 JK |
1121 | set->variant->same_set(set, clash)) |
1122 | ret = 0; | |
1123 | goto cleanup; | |
9076aea7 JK |
1124 | } else if (ret == -IPSET_ERR_MAX_SETS) { |
1125 | struct ip_set **list, **tmp; | |
1785e8f4 | 1126 | ip_set_id_t i = inst->ip_set_max + IP_SET_INC; |
9076aea7 | 1127 | |
1785e8f4 | 1128 | if (i < inst->ip_set_max || i == IPSET_INVALID_ID) |
9076aea7 JK |
1129 | /* Wraparound */ |
1130 | goto cleanup; | |
1131 | ||
ed956f39 | 1132 | list = kvcalloc(i, sizeof(struct ip_set *), GFP_KERNEL); |
9076aea7 JK |
1133 | if (!list) |
1134 | goto cleanup; | |
1135 | /* nfnl mutex is held, both lists are valid */ | |
3e90ebd3 | 1136 | tmp = ip_set_dereference(inst->ip_set_list); |
1785e8f4 VL |
1137 | memcpy(list, tmp, sizeof(struct ip_set *) * inst->ip_set_max); |
1138 | rcu_assign_pointer(inst->ip_set_list, list); | |
9076aea7 JK |
1139 | /* Make sure all current packets have passed through */ |
1140 | synchronize_net(); | |
1141 | /* Use new list */ | |
1785e8f4 VL |
1142 | index = inst->ip_set_max; |
1143 | inst->ip_set_max = i; | |
ed956f39 | 1144 | kvfree(tmp); |
9076aea7 | 1145 | ret = 0; |
ca0f6a5c | 1146 | } else if (ret) { |
9076aea7 | 1147 | goto cleanup; |
ca0f6a5c | 1148 | } |
a7b4f989 | 1149 | |
ca0f6a5c | 1150 | /* Finally! Add our shiny new set to the list, and be done. */ |
a7b4f989 | 1151 | pr_debug("create: '%s' created with index %u!\n", set->name, index); |
3e90ebd3 | 1152 | ip_set(inst, index) = set; |
a7b4f989 JK |
1153 | |
1154 | return ret; | |
1155 | ||
1156 | cleanup: | |
1157 | set->variant->destroy(set); | |
1158 | put_out: | |
1159 | module_put(set->type->me); | |
1160 | out: | |
1161 | kfree(set); | |
1162 | return ret; | |
1163 | } | |
1164 | ||
1165 | /* Destroy sets */ | |
1166 | ||
1167 | static const struct nla_policy | |
1168 | ip_set_setname_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
1169 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
1170 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, | |
1171 | .len = IPSET_MAXNAMELEN - 1 }, | |
1172 | }; | |
1173 | ||
1174 | static void | |
9c1ba5c8 | 1175 | ip_set_destroy_set(struct ip_set *set) |
a7b4f989 | 1176 | { |
a7b4f989 | 1177 | pr_debug("set: %s\n", set->name); |
a7b4f989 JK |
1178 | |
1179 | /* Must call it without holding any lock */ | |
1180 | set->variant->destroy(set); | |
1181 | module_put(set->type->me); | |
1182 | kfree(set); | |
1183 | } | |
1184 | ||
a6555365 PNA |
1185 | static int ip_set_destroy(struct sk_buff *skb, const struct nfnl_info *info, |
1186 | const struct nlattr * const attr[]) | |
a7b4f989 | 1187 | { |
a6555365 | 1188 | struct ip_set_net *inst = ip_set_pernet(info->net); |
9076aea7 | 1189 | struct ip_set *s; |
a7b4f989 | 1190 | ip_set_id_t i; |
2f9f28b2 | 1191 | int ret = 0; |
a7b4f989 | 1192 | |
23c42a40 | 1193 | if (unlikely(protocol_min_failed(attr))) |
a7b4f989 JK |
1194 | return -IPSET_ERR_PROTOCOL; |
1195 | ||
45040978 JK |
1196 | /* Must wait for flush to be really finished in list:set */ |
1197 | rcu_barrier(); | |
1198 | ||
2f9f28b2 JK |
1199 | /* Commands are serialized and references are |
1200 | * protected by the ip_set_ref_lock. | |
1201 | * External systems (i.e. xt_set) must call | |
1202 | * ip_set_put|get_nfnl_* functions, that way we | |
1203 | * can safely check references here. | |
1204 | * | |
1205 | * list:set timer can only decrement the reference | |
1206 | * counter, so if it's already zero, we can proceed | |
1207 | * without holding the lock. | |
1208 | */ | |
1209 | read_lock_bh(&ip_set_ref_lock); | |
a7b4f989 | 1210 | if (!attr[IPSET_ATTR_SETNAME]) { |
1785e8f4 | 1211 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 1212 | s = ip_set(inst, i); |
596cf3fe | 1213 | if (s && (s->ref || s->ref_netlink)) { |
9d883232 | 1214 | ret = -IPSET_ERR_BUSY; |
2f9f28b2 JK |
1215 | goto out; |
1216 | } | |
a7b4f989 | 1217 | } |
9c1ba5c8 | 1218 | inst->is_destroyed = true; |
2f9f28b2 | 1219 | read_unlock_bh(&ip_set_ref_lock); |
1785e8f4 | 1220 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 1221 | s = ip_set(inst, i); |
9c1ba5c8 JK |
1222 | if (s) { |
1223 | ip_set(inst, i) = NULL; | |
1224 | ip_set_destroy_set(s); | |
1225 | } | |
a7b4f989 | 1226 | } |
9c1ba5c8 JK |
1227 | /* Modified by ip_set_destroy() only, which is serialized */ |
1228 | inst->is_destroyed = false; | |
a7b4f989 | 1229 | } else { |
a6555365 | 1230 | u32 flags = flag_exist(info->nlh); |
1785e8f4 VL |
1231 | s = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), |
1232 | &i); | |
ca0f6a5c | 1233 | if (!s) { |
a304ea7d JK |
1234 | if (!(flags & IPSET_FLAG_EXIST)) |
1235 | ret = -ENOENT; | |
2f9f28b2 | 1236 | goto out; |
596cf3fe | 1237 | } else if (s->ref || s->ref_netlink) { |
2f9f28b2 JK |
1238 | ret = -IPSET_ERR_BUSY; |
1239 | goto out; | |
1240 | } | |
9c1ba5c8 | 1241 | ip_set(inst, i) = NULL; |
2f9f28b2 | 1242 | read_unlock_bh(&ip_set_ref_lock); |
a7b4f989 | 1243 | |
9c1ba5c8 | 1244 | ip_set_destroy_set(s); |
a7b4f989 JK |
1245 | } |
1246 | return 0; | |
2f9f28b2 JK |
1247 | out: |
1248 | read_unlock_bh(&ip_set_ref_lock); | |
1249 | return ret; | |
a7b4f989 JK |
1250 | } |
1251 | ||
1252 | /* Flush sets */ | |
1253 | ||
1254 | static void | |
1255 | ip_set_flush_set(struct ip_set *set) | |
1256 | { | |
1257 | pr_debug("set: %s\n", set->name); | |
1258 | ||
f66ee041 | 1259 | ip_set_lock(set); |
a7b4f989 | 1260 | set->variant->flush(set); |
f66ee041 | 1261 | ip_set_unlock(set); |
a7b4f989 JK |
1262 | } |
1263 | ||
a6555365 PNA |
1264 | static int ip_set_flush(struct sk_buff *skb, const struct nfnl_info *info, |
1265 | const struct nlattr * const attr[]) | |
a7b4f989 | 1266 | { |
a6555365 | 1267 | struct ip_set_net *inst = ip_set_pernet(info->net); |
9076aea7 | 1268 | struct ip_set *s; |
a7b4f989 JK |
1269 | ip_set_id_t i; |
1270 | ||
23c42a40 | 1271 | if (unlikely(protocol_min_failed(attr))) |
9184a9cb | 1272 | return -IPSET_ERR_PROTOCOL; |
a7b4f989 JK |
1273 | |
1274 | if (!attr[IPSET_ATTR_SETNAME]) { | |
1785e8f4 | 1275 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 1276 | s = ip_set(inst, i); |
ca0f6a5c | 1277 | if (s) |
9076aea7 JK |
1278 | ip_set_flush_set(s); |
1279 | } | |
a7b4f989 | 1280 | } else { |
1785e8f4 | 1281 | s = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
ca0f6a5c | 1282 | if (!s) |
a7b4f989 JK |
1283 | return -ENOENT; |
1284 | ||
9076aea7 | 1285 | ip_set_flush_set(s); |
a7b4f989 JK |
1286 | } |
1287 | ||
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | /* Rename a set */ | |
1292 | ||
1293 | static const struct nla_policy | |
1294 | ip_set_setname2_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
1295 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
1296 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, | |
1297 | .len = IPSET_MAXNAMELEN - 1 }, | |
1298 | [IPSET_ATTR_SETNAME2] = { .type = NLA_NUL_STRING, | |
1299 | .len = IPSET_MAXNAMELEN - 1 }, | |
1300 | }; | |
1301 | ||
a6555365 PNA |
1302 | static int ip_set_rename(struct sk_buff *skb, const struct nfnl_info *info, |
1303 | const struct nlattr * const attr[]) | |
a7b4f989 | 1304 | { |
a6555365 | 1305 | struct ip_set_net *inst = ip_set_pernet(info->net); |
9076aea7 | 1306 | struct ip_set *set, *s; |
a7b4f989 JK |
1307 | const char *name2; |
1308 | ip_set_id_t i; | |
2f9f28b2 | 1309 | int ret = 0; |
a7b4f989 | 1310 | |
23c42a40 | 1311 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c JK |
1312 | !attr[IPSET_ATTR_SETNAME] || |
1313 | !attr[IPSET_ATTR_SETNAME2])) | |
a7b4f989 JK |
1314 | return -IPSET_ERR_PROTOCOL; |
1315 | ||
1785e8f4 | 1316 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
ca0f6a5c | 1317 | if (!set) |
a7b4f989 | 1318 | return -ENOENT; |
2f9f28b2 | 1319 | |
439cd39e | 1320 | write_lock_bh(&ip_set_ref_lock); |
6c1f7e2c | 1321 | if (set->ref != 0 || set->ref_netlink != 0) { |
2f9f28b2 JK |
1322 | ret = -IPSET_ERR_REFERENCED; |
1323 | goto out; | |
1324 | } | |
a7b4f989 JK |
1325 | |
1326 | name2 = nla_data(attr[IPSET_ATTR_SETNAME2]); | |
1785e8f4 | 1327 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 1328 | s = ip_set(inst, i); |
ca0f6a5c | 1329 | if (s && STRNCMP(s->name, name2)) { |
2f9f28b2 JK |
1330 | ret = -IPSET_ERR_EXIST_SETNAME2; |
1331 | goto out; | |
1332 | } | |
a7b4f989 | 1333 | } |
e5331403 | 1334 | strscpy_pad(set->name, name2, IPSET_MAXNAMELEN); |
a7b4f989 | 1335 | |
2f9f28b2 | 1336 | out: |
439cd39e | 1337 | write_unlock_bh(&ip_set_ref_lock); |
2f9f28b2 | 1338 | return ret; |
a7b4f989 JK |
1339 | } |
1340 | ||
1341 | /* Swap two sets so that name/index points to the other. | |
1342 | * References and set names are also swapped. | |
1343 | * | |
2f9f28b2 JK |
1344 | * The commands are serialized by the nfnl mutex and references are |
1345 | * protected by the ip_set_ref_lock. The kernel interfaces | |
a7b4f989 JK |
1346 | * do not hold the mutex but the pointer settings are atomic |
1347 | * so the ip_set_list always contains valid pointers to the sets. | |
1348 | */ | |
1349 | ||
a6555365 PNA |
1350 | static int ip_set_swap(struct sk_buff *skb, const struct nfnl_info *info, |
1351 | const struct nlattr * const attr[]) | |
a7b4f989 | 1352 | { |
a6555365 | 1353 | struct ip_set_net *inst = ip_set_pernet(info->net); |
a7b4f989 JK |
1354 | struct ip_set *from, *to; |
1355 | ip_set_id_t from_id, to_id; | |
1356 | char from_name[IPSET_MAXNAMELEN]; | |
a7b4f989 | 1357 | |
23c42a40 | 1358 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c JK |
1359 | !attr[IPSET_ATTR_SETNAME] || |
1360 | !attr[IPSET_ATTR_SETNAME2])) | |
a7b4f989 JK |
1361 | return -IPSET_ERR_PROTOCOL; |
1362 | ||
1785e8f4 VL |
1363 | from = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), |
1364 | &from_id); | |
ca0f6a5c | 1365 | if (!from) |
a7b4f989 JK |
1366 | return -ENOENT; |
1367 | ||
1785e8f4 VL |
1368 | to = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME2]), |
1369 | &to_id); | |
ca0f6a5c | 1370 | if (!to) |
a7b4f989 JK |
1371 | return -IPSET_ERR_EXIST_SETNAME2; |
1372 | ||
a7b4f989 | 1373 | /* Features must not change. |
ca0f6a5c JK |
1374 | * Not an artifical restriction anymore, as we must prevent |
1375 | * possible loops created by swapping in setlist type of sets. | |
1376 | */ | |
a7b4f989 | 1377 | if (!(from->type->features == to->type->features && |
169faa2e | 1378 | from->family == to->family)) |
a7b4f989 JK |
1379 | return -IPSET_ERR_TYPE_MISMATCH; |
1380 | ||
e5173418 RL |
1381 | write_lock_bh(&ip_set_ref_lock); |
1382 | ||
1383 | if (from->ref_netlink || to->ref_netlink) { | |
1384 | write_unlock_bh(&ip_set_ref_lock); | |
596cf3fe | 1385 | return -EBUSY; |
e5173418 | 1386 | } |
596cf3fe | 1387 | |
e5331403 JS |
1388 | strscpy_pad(from_name, from->name, IPSET_MAXNAMELEN); |
1389 | strscpy_pad(from->name, to->name, IPSET_MAXNAMELEN); | |
1390 | strscpy_pad(to->name, from_name, IPSET_MAXNAMELEN); | |
a7b4f989 | 1391 | |
2f9f28b2 | 1392 | swap(from->ref, to->ref); |
3e90ebd3 PM |
1393 | ip_set(inst, from_id) = to; |
1394 | ip_set(inst, to_id) = from; | |
2f9f28b2 | 1395 | write_unlock_bh(&ip_set_ref_lock); |
a7b4f989 | 1396 | |
28628fa9 JK |
1397 | /* Make sure all readers of the old set pointers are completed. */ |
1398 | synchronize_rcu(); | |
1399 | ||
a7b4f989 JK |
1400 | return 0; |
1401 | } | |
1402 | ||
1403 | /* List/save set data */ | |
1404 | ||
c1e2e043 JK |
1405 | #define DUMP_INIT 0 |
1406 | #define DUMP_ALL 1 | |
1407 | #define DUMP_ONE 2 | |
1408 | #define DUMP_LAST 3 | |
1409 | ||
1410 | #define DUMP_TYPE(arg) (((u32)(arg)) & 0x0000FFFF) | |
1411 | #define DUMP_FLAGS(arg) (((u32)(arg)) >> 16) | |
a7b4f989 | 1412 | |
85639185 JS |
1413 | int |
1414 | ip_set_put_flags(struct sk_buff *skb, struct ip_set *set) | |
1415 | { | |
1416 | u32 cadt_flags = 0; | |
1417 | ||
1418 | if (SET_WITH_TIMEOUT(set)) | |
1419 | if (unlikely(nla_put_net32(skb, IPSET_ATTR_TIMEOUT, | |
1420 | htonl(set->timeout)))) | |
1421 | return -EMSGSIZE; | |
1422 | if (SET_WITH_COUNTER(set)) | |
1423 | cadt_flags |= IPSET_FLAG_WITH_COUNTERS; | |
1424 | if (SET_WITH_COMMENT(set)) | |
1425 | cadt_flags |= IPSET_FLAG_WITH_COMMENT; | |
1426 | if (SET_WITH_SKBINFO(set)) | |
1427 | cadt_flags |= IPSET_FLAG_WITH_SKBINFO; | |
1428 | if (SET_WITH_FORCEADD(set)) | |
1429 | cadt_flags |= IPSET_FLAG_WITH_FORCEADD; | |
1430 | ||
1431 | if (!cadt_flags) | |
1432 | return 0; | |
1433 | return nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(cadt_flags)); | |
1434 | } | |
1435 | EXPORT_SYMBOL_GPL(ip_set_put_flags); | |
1436 | ||
a7b4f989 JK |
1437 | static int |
1438 | ip_set_dump_done(struct netlink_callback *cb) | |
1439 | { | |
93302880 | 1440 | if (cb->args[IPSET_CB_ARG0]) { |
c4c99783 JK |
1441 | struct ip_set_net *inst = |
1442 | (struct ip_set_net *)cb->args[IPSET_CB_NET]; | |
1443 | ip_set_id_t index = (ip_set_id_t)cb->args[IPSET_CB_INDEX]; | |
8a02bdd5 | 1444 | struct ip_set *set = ip_set_ref_netlink(inst, index); |
c4c99783 JK |
1445 | |
1446 | if (set->variant->uref) | |
1447 | set->variant->uref(set, cb, false); | |
1448 | pr_debug("release set %s\n", set->name); | |
596cf3fe | 1449 | __ip_set_put_netlink(set); |
a7b4f989 JK |
1450 | } |
1451 | return 0; | |
1452 | } | |
1453 | ||
1454 | static inline void | |
1455 | dump_attrs(struct nlmsghdr *nlh) | |
1456 | { | |
1457 | const struct nlattr *attr; | |
1458 | int rem; | |
1459 | ||
1460 | pr_debug("dump nlmsg\n"); | |
1461 | nlmsg_for_each_attr(attr, nlh, sizeof(struct nfgenmsg), rem) { | |
1462 | pr_debug("type: %u, len %u\n", nla_type(attr), attr->nla_len); | |
1463 | } | |
1464 | } | |
1465 | ||
12899756 JK |
1466 | static const struct nla_policy |
1467 | ip_set_dump_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
1468 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
1469 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, | |
1470 | .len = IPSET_MAXNAMELEN - 1 }, | |
1471 | [IPSET_ATTR_FLAGS] = { .type = NLA_U32 }, | |
1472 | }; | |
1473 | ||
a7b4f989 | 1474 | static int |
50385171 | 1475 | ip_set_dump_start(struct netlink_callback *cb) |
a7b4f989 JK |
1476 | { |
1477 | struct nlmsghdr *nlh = nlmsg_hdr(cb->skb); | |
573ce260 | 1478 | int min_len = nlmsg_total_size(sizeof(struct nfgenmsg)); |
ca0f6a5c | 1479 | struct nlattr *cda[IPSET_ATTR_CMD_MAX + 1]; |
a7b4f989 | 1480 | struct nlattr *attr = (void *)nlh + min_len; |
50385171 KJ |
1481 | struct sk_buff *skb = cb->skb; |
1482 | struct ip_set_net *inst = ip_set_pernet(sock_net(skb->sk)); | |
c1e2e043 | 1483 | u32 dump_type; |
13c6ba1f | 1484 | int ret; |
a7b4f989 | 1485 | |
12899756 JK |
1486 | ret = nla_parse(cda, IPSET_ATTR_CMD_MAX, attr, |
1487 | nlh->nlmsg_len - min_len, | |
1488 | ip_set_dump_policy, NULL); | |
13c6ba1f | 1489 | if (ret) |
50385171 | 1490 | goto error; |
a7b4f989 | 1491 | |
23c42a40 | 1492 | cb->args[IPSET_CB_PROTO] = nla_get_u8(cda[IPSET_ATTR_PROTOCOL]); |
c1e2e043 | 1493 | if (cda[IPSET_ATTR_SETNAME]) { |
50385171 | 1494 | ip_set_id_t index; |
9076aea7 JK |
1495 | struct ip_set *set; |
1496 | ||
1785e8f4 | 1497 | set = find_set_and_id(inst, nla_data(cda[IPSET_ATTR_SETNAME]), |
9076aea7 | 1498 | &index); |
50385171 KJ |
1499 | if (!set) { |
1500 | ret = -ENOENT; | |
1501 | goto error; | |
1502 | } | |
c1e2e043 | 1503 | dump_type = DUMP_ONE; |
93302880 | 1504 | cb->args[IPSET_CB_INDEX] = index; |
ca0f6a5c | 1505 | } else { |
c1e2e043 | 1506 | dump_type = DUMP_ALL; |
ca0f6a5c | 1507 | } |
c1e2e043 JK |
1508 | |
1509 | if (cda[IPSET_ATTR_FLAGS]) { | |
1510 | u32 f = ip_set_get_h32(cda[IPSET_ATTR_FLAGS]); | |
ca0f6a5c | 1511 | |
c1e2e043 JK |
1512 | dump_type |= (f << 16); |
1513 | } | |
93302880 JK |
1514 | cb->args[IPSET_CB_NET] = (unsigned long)inst; |
1515 | cb->args[IPSET_CB_DUMP] = dump_type; | |
a7b4f989 | 1516 | |
a7b4f989 | 1517 | return 0; |
50385171 KJ |
1518 | |
1519 | error: | |
1520 | /* We have to create and send the error message manually :-( */ | |
1521 | if (nlh->nlmsg_flags & NLM_F_ACK) { | |
1522 | netlink_ack(cb->skb, nlh, ret, NULL); | |
1523 | } | |
1524 | return ret; | |
a7b4f989 JK |
1525 | } |
1526 | ||
1527 | static int | |
50385171 | 1528 | ip_set_dump_do(struct sk_buff *skb, struct netlink_callback *cb) |
a7b4f989 JK |
1529 | { |
1530 | ip_set_id_t index = IPSET_INVALID_ID, max; | |
1531 | struct ip_set *set = NULL; | |
1532 | struct nlmsghdr *nlh = NULL; | |
15e47304 | 1533 | unsigned int flags = NETLINK_CB(cb->skb).portid ? NLM_F_MULTI : 0; |
93302880 | 1534 | struct ip_set_net *inst = ip_set_pernet(sock_net(skb->sk)); |
c1e2e043 | 1535 | u32 dump_type, dump_flags; |
9c1ba5c8 | 1536 | bool is_destroyed; |
a7b4f989 JK |
1537 | int ret = 0; |
1538 | ||
50385171 KJ |
1539 | if (!cb->args[IPSET_CB_DUMP]) |
1540 | return -EINVAL; | |
a7b4f989 | 1541 | |
93302880 | 1542 | if (cb->args[IPSET_CB_INDEX] >= inst->ip_set_max) |
a7b4f989 JK |
1543 | goto out; |
1544 | ||
93302880 JK |
1545 | dump_type = DUMP_TYPE(cb->args[IPSET_CB_DUMP]); |
1546 | dump_flags = DUMP_FLAGS(cb->args[IPSET_CB_DUMP]); | |
1547 | max = dump_type == DUMP_ONE ? cb->args[IPSET_CB_INDEX] + 1 | |
1548 | : inst->ip_set_max; | |
a8a8a093 | 1549 | dump_last: |
93302880 JK |
1550 | pr_debug("dump type, flag: %u %u index: %ld\n", |
1551 | dump_type, dump_flags, cb->args[IPSET_CB_INDEX]); | |
1552 | for (; cb->args[IPSET_CB_INDEX] < max; cb->args[IPSET_CB_INDEX]++) { | |
ca0f6a5c | 1553 | index = (ip_set_id_t)cb->args[IPSET_CB_INDEX]; |
9c1ba5c8 | 1554 | write_lock_bh(&ip_set_ref_lock); |
3e90ebd3 | 1555 | set = ip_set(inst, index); |
9c1ba5c8 JK |
1556 | is_destroyed = inst->is_destroyed; |
1557 | if (!set || is_destroyed) { | |
1558 | write_unlock_bh(&ip_set_ref_lock); | |
c1e2e043 | 1559 | if (dump_type == DUMP_ONE) { |
a7b4f989 JK |
1560 | ret = -ENOENT; |
1561 | goto out; | |
1562 | } | |
9c1ba5c8 JK |
1563 | if (is_destroyed) { |
1564 | /* All sets are just being destroyed */ | |
1565 | ret = 0; | |
1566 | goto out; | |
1567 | } | |
a7b4f989 JK |
1568 | continue; |
1569 | } | |
1570 | /* When dumping all sets, we must dump "sorted" | |
1571 | * so that lists (unions of sets) are dumped last. | |
1572 | */ | |
c1e2e043 JK |
1573 | if (dump_type != DUMP_ONE && |
1574 | ((dump_type == DUMP_ALL) == | |
9c1ba5c8 JK |
1575 | !!(set->type->features & IPSET_DUMP_LAST))) { |
1576 | write_unlock_bh(&ip_set_ref_lock); | |
a7b4f989 | 1577 | continue; |
9c1ba5c8 | 1578 | } |
a7b4f989 | 1579 | pr_debug("List set: %s\n", set->name); |
93302880 | 1580 | if (!cb->args[IPSET_CB_ARG0]) { |
a7b4f989 JK |
1581 | /* Start listing: make sure set won't be destroyed */ |
1582 | pr_debug("reference set\n"); | |
596cf3fe | 1583 | set->ref_netlink++; |
a7b4f989 | 1584 | } |
9c1ba5c8 | 1585 | write_unlock_bh(&ip_set_ref_lock); |
15e47304 | 1586 | nlh = start_msg(skb, NETLINK_CB(cb->skb).portid, |
a7b4f989 JK |
1587 | cb->nlh->nlmsg_seq, flags, |
1588 | IPSET_CMD_LIST); | |
1589 | if (!nlh) { | |
1590 | ret = -EMSGSIZE; | |
1591 | goto release_refcount; | |
1592 | } | |
23c42a40 JK |
1593 | if (nla_put_u8(skb, IPSET_ATTR_PROTOCOL, |
1594 | cb->args[IPSET_CB_PROTO]) || | |
7cf7899d DM |
1595 | nla_put_string(skb, IPSET_ATTR_SETNAME, set->name)) |
1596 | goto nla_put_failure; | |
c1e2e043 JK |
1597 | if (dump_flags & IPSET_FLAG_LIST_SETNAME) |
1598 | goto next_set; | |
93302880 | 1599 | switch (cb->args[IPSET_CB_ARG0]) { |
a7b4f989 JK |
1600 | case 0: |
1601 | /* Core header data */ | |
7cf7899d DM |
1602 | if (nla_put_string(skb, IPSET_ATTR_TYPENAME, |
1603 | set->type->name) || | |
1604 | nla_put_u8(skb, IPSET_ATTR_FAMILY, | |
1605 | set->family) || | |
1606 | nla_put_u8(skb, IPSET_ATTR_REVISION, | |
1607 | set->revision)) | |
1608 | goto nla_put_failure; | |
23c42a40 JK |
1609 | if (cb->args[IPSET_CB_PROTO] > IPSET_PROTOCOL_MIN && |
1610 | nla_put_net16(skb, IPSET_ATTR_INDEX, htons(index))) | |
1611 | goto nla_put_failure; | |
a7b4f989 JK |
1612 | ret = set->variant->head(set, skb); |
1613 | if (ret < 0) | |
1614 | goto release_refcount; | |
c1e2e043 JK |
1615 | if (dump_flags & IPSET_FLAG_LIST_HEADER) |
1616 | goto next_set; | |
c4c99783 JK |
1617 | if (set->variant->uref) |
1618 | set->variant->uref(set, cb, true); | |
954d8297 | 1619 | fallthrough; |
a7b4f989 | 1620 | default: |
a7b4f989 | 1621 | ret = set->variant->list(set, skb, cb); |
93302880 | 1622 | if (!cb->args[IPSET_CB_ARG0]) |
a7b4f989 | 1623 | /* Set is done, proceed with next one */ |
c1e2e043 | 1624 | goto next_set; |
a7b4f989 JK |
1625 | goto release_refcount; |
1626 | } | |
1627 | } | |
a8a8a093 | 1628 | /* If we dump all sets, continue with dumping last ones */ |
c1e2e043 JK |
1629 | if (dump_type == DUMP_ALL) { |
1630 | dump_type = DUMP_LAST; | |
93302880 JK |
1631 | cb->args[IPSET_CB_DUMP] = dump_type | (dump_flags << 16); |
1632 | cb->args[IPSET_CB_INDEX] = 0; | |
c4c99783 JK |
1633 | if (set && set->variant->uref) |
1634 | set->variant->uref(set, cb, false); | |
a8a8a093 JK |
1635 | goto dump_last; |
1636 | } | |
a7b4f989 JK |
1637 | goto out; |
1638 | ||
1639 | nla_put_failure: | |
1640 | ret = -EFAULT; | |
c1e2e043 JK |
1641 | next_set: |
1642 | if (dump_type == DUMP_ONE) | |
93302880 | 1643 | cb->args[IPSET_CB_INDEX] = IPSET_INVALID_ID; |
c1e2e043 | 1644 | else |
93302880 | 1645 | cb->args[IPSET_CB_INDEX]++; |
a7b4f989 JK |
1646 | release_refcount: |
1647 | /* If there was an error or set is done, release set */ | |
93302880 | 1648 | if (ret || !cb->args[IPSET_CB_ARG0]) { |
8a02bdd5 | 1649 | set = ip_set_ref_netlink(inst, index); |
c4c99783 JK |
1650 | if (set->variant->uref) |
1651 | set->variant->uref(set, cb, false); | |
1652 | pr_debug("release set %s\n", set->name); | |
596cf3fe | 1653 | __ip_set_put_netlink(set); |
93302880 | 1654 | cb->args[IPSET_CB_ARG0] = 0; |
a7b4f989 | 1655 | } |
a7b4f989 JK |
1656 | out: |
1657 | if (nlh) { | |
1658 | nlmsg_end(skb, nlh); | |
1659 | pr_debug("nlmsg_len: %u\n", nlh->nlmsg_len); | |
1660 | dump_attrs(nlh); | |
1661 | } | |
1662 | ||
1663 | return ret < 0 ? ret : skb->len; | |
1664 | } | |
1665 | ||
a6555365 PNA |
1666 | static int ip_set_dump(struct sk_buff *skb, const struct nfnl_info *info, |
1667 | const struct nlattr * const attr[]) | |
a7b4f989 | 1668 | { |
23c42a40 | 1669 | if (unlikely(protocol_min_failed(attr))) |
a7b4f989 JK |
1670 | return -IPSET_ERR_PROTOCOL; |
1671 | ||
80d326fa PNA |
1672 | { |
1673 | struct netlink_dump_control c = { | |
50385171 KJ |
1674 | .start = ip_set_dump_start, |
1675 | .dump = ip_set_dump_do, | |
80d326fa PNA |
1676 | .done = ip_set_dump_done, |
1677 | }; | |
a6555365 | 1678 | return netlink_dump_start(info->sk, skb, info->nlh, &c); |
80d326fa | 1679 | } |
a7b4f989 JK |
1680 | } |
1681 | ||
1682 | /* Add, del and test */ | |
1683 | ||
1684 | static const struct nla_policy ip_set_adt_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
1685 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
1686 | [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING, | |
1687 | .len = IPSET_MAXNAMELEN - 1 }, | |
1688 | [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, | |
1689 | [IPSET_ATTR_DATA] = { .type = NLA_NESTED }, | |
1690 | [IPSET_ATTR_ADT] = { .type = NLA_NESTED }, | |
1691 | }; | |
1692 | ||
1693 | static int | |
e0241ae6 PNA |
1694 | call_ad(struct net *net, struct sock *ctnl, struct sk_buff *skb, |
1695 | struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, | |
a7b4f989 JK |
1696 | u32 flags, bool use_lineno) |
1697 | { | |
3d14b171 | 1698 | int ret; |
a7b4f989 | 1699 | u32 lineno = 0; |
3d14b171 | 1700 | bool eexist = flags & IPSET_FLAG_EXIST, retried = false; |
a7b4f989 JK |
1701 | |
1702 | do { | |
24e22789 | 1703 | if (retried) { |
7433b6d2 | 1704 | __ip_set_get_netlink(set); |
24e22789 KI |
1705 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
1706 | cond_resched(); | |
1707 | nfnl_lock(NFNL_SUBSYS_IPSET); | |
7433b6d2 | 1708 | __ip_set_put_netlink(set); |
24e22789 KI |
1709 | } |
1710 | ||
f66ee041 | 1711 | ip_set_lock(set); |
3d14b171 | 1712 | ret = set->variant->uadt(set, tb, adt, &lineno, flags, retried); |
f66ee041 | 1713 | ip_set_unlock(set); |
3d14b171 | 1714 | retried = true; |
5e29dc36 JK |
1715 | } while (ret == -ERANGE || |
1716 | (ret == -EAGAIN && | |
1717 | set->variant->resize && | |
1718 | (ret = set->variant->resize(set, retried)) == 0)); | |
a7b4f989 JK |
1719 | |
1720 | if (!ret || (ret == -IPSET_ERR_EXIST && eexist)) | |
1721 | return 0; | |
1722 | if (lineno && use_lineno) { | |
1723 | /* Error in restore/batch mode: send back lineno */ | |
5f52bc3c JK |
1724 | struct nlmsghdr *rep, *nlh = nlmsg_hdr(skb); |
1725 | struct sk_buff *skb2; | |
1726 | struct nlmsgerr *errmsg; | |
73e64e18 JK |
1727 | size_t payload = min(SIZE_MAX, |
1728 | sizeof(*errmsg) + nlmsg_len(nlh)); | |
573ce260 | 1729 | int min_len = nlmsg_total_size(sizeof(struct nfgenmsg)); |
ca0f6a5c | 1730 | struct nlattr *cda[IPSET_ATTR_CMD_MAX + 1]; |
5f52bc3c | 1731 | struct nlattr *cmdattr; |
a7b4f989 JK |
1732 | u32 *errline; |
1733 | ||
5f52bc3c | 1734 | skb2 = nlmsg_new(payload, GFP_KERNEL); |
ca0f6a5c | 1735 | if (!skb2) |
5f52bc3c | 1736 | return -ENOMEM; |
710d21fd KC |
1737 | rep = nlmsg_put(skb2, NETLINK_CB(skb).portid, |
1738 | nlh->nlmsg_seq, NLMSG_ERROR, payload, 0); | |
5f52bc3c JK |
1739 | errmsg = nlmsg_data(rep); |
1740 | errmsg->error = ret; | |
710d21fd KC |
1741 | unsafe_memcpy(&errmsg->msg, nlh, nlh->nlmsg_len, |
1742 | /* Bounds checked by the skb layer. */); | |
1743 | ||
5f52bc3c JK |
1744 | cmdattr = (void *)&errmsg->msg + min_len; |
1745 | ||
12899756 JK |
1746 | ret = nla_parse(cda, IPSET_ATTR_CMD_MAX, cmdattr, |
1747 | nlh->nlmsg_len - min_len, ip_set_adt_policy, | |
1748 | NULL); | |
a7b4f989 | 1749 | |
f4f5748b AP |
1750 | if (ret) { |
1751 | nlmsg_free(skb2); | |
1752 | return ret; | |
1753 | } | |
a7b4f989 JK |
1754 | errline = nla_data(cda[IPSET_ATTR_LINENO]); |
1755 | ||
1756 | *errline = lineno; | |
5f52bc3c | 1757 | |
e0241ae6 | 1758 | nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid); |
5f52bc3c JK |
1759 | /* Signal netlink not to send its ACK/errmsg. */ |
1760 | return -EINTR; | |
a7b4f989 JK |
1761 | } |
1762 | ||
1763 | return ret; | |
1764 | } | |
1765 | ||
f0cb8390 FF |
1766 | static int ip_set_ad(struct net *net, struct sock *ctnl, |
1767 | struct sk_buff *skb, | |
1768 | enum ipset_adt adt, | |
1769 | const struct nlmsghdr *nlh, | |
1770 | const struct nlattr * const attr[], | |
1771 | struct netlink_ext_ack *extack) | |
a7b4f989 | 1772 | { |
7b8002a1 | 1773 | struct ip_set_net *inst = ip_set_pernet(net); |
a7b4f989 | 1774 | struct ip_set *set; |
ca0f6a5c | 1775 | struct nlattr *tb[IPSET_ATTR_ADT_MAX + 1] = {}; |
a7b4f989 JK |
1776 | const struct nlattr *nla; |
1777 | u32 flags = flag_exist(nlh); | |
1778 | bool use_lineno; | |
1779 | int ret = 0; | |
1780 | ||
23c42a40 | 1781 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c | 1782 | !attr[IPSET_ATTR_SETNAME] || |
a7b4f989 JK |
1783 | !((attr[IPSET_ATTR_DATA] != NULL) ^ |
1784 | (attr[IPSET_ATTR_ADT] != NULL)) || | |
ca0f6a5c | 1785 | (attr[IPSET_ATTR_DATA] && |
a7b4f989 | 1786 | !flag_nested(attr[IPSET_ATTR_DATA])) || |
ca0f6a5c | 1787 | (attr[IPSET_ATTR_ADT] && |
a7b4f989 | 1788 | (!flag_nested(attr[IPSET_ATTR_ADT]) || |
ca0f6a5c | 1789 | !attr[IPSET_ATTR_LINENO])))) |
a7b4f989 JK |
1790 | return -IPSET_ERR_PROTOCOL; |
1791 | ||
1785e8f4 | 1792 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
ca0f6a5c | 1793 | if (!set) |
a7b4f989 JK |
1794 | return -ENOENT; |
1795 | ||
1796 | use_lineno = !!attr[IPSET_ATTR_LINENO]; | |
1797 | if (attr[IPSET_ATTR_DATA]) { | |
12899756 JK |
1798 | if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, |
1799 | attr[IPSET_ATTR_DATA], | |
1800 | set->type->adt_policy, NULL)) | |
a7b4f989 | 1801 | return -IPSET_ERR_PROTOCOL; |
e0241ae6 | 1802 | ret = call_ad(net, ctnl, skb, set, tb, adt, flags, |
5f52bc3c | 1803 | use_lineno); |
a7b4f989 JK |
1804 | } else { |
1805 | int nla_rem; | |
1806 | ||
1807 | nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) { | |
a7b4f989 JK |
1808 | if (nla_type(nla) != IPSET_ATTR_DATA || |
1809 | !flag_nested(nla) || | |
12899756 JK |
1810 | nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla, |
1811 | set->type->adt_policy, NULL)) | |
a7b4f989 | 1812 | return -IPSET_ERR_PROTOCOL; |
e0241ae6 | 1813 | ret = call_ad(net, ctnl, skb, set, tb, adt, |
a7b4f989 JK |
1814 | flags, use_lineno); |
1815 | if (ret < 0) | |
1816 | return ret; | |
1817 | } | |
1818 | } | |
1819 | return ret; | |
1820 | } | |
1821 | ||
a6555365 PNA |
1822 | static int ip_set_uadd(struct sk_buff *skb, const struct nfnl_info *info, |
1823 | const struct nlattr * const attr[]) | |
a7b4f989 | 1824 | { |
a6555365 PNA |
1825 | return ip_set_ad(info->net, info->sk, skb, |
1826 | IPSET_ADD, info->nlh, attr, info->extack); | |
f0cb8390 | 1827 | } |
a7b4f989 | 1828 | |
a6555365 PNA |
1829 | static int ip_set_udel(struct sk_buff *skb, const struct nfnl_info *info, |
1830 | const struct nlattr * const attr[]) | |
f0cb8390 | 1831 | { |
a6555365 PNA |
1832 | return ip_set_ad(info->net, info->sk, skb, |
1833 | IPSET_DEL, info->nlh, attr, info->extack); | |
a7b4f989 JK |
1834 | } |
1835 | ||
a6555365 PNA |
1836 | static int ip_set_utest(struct sk_buff *skb, const struct nfnl_info *info, |
1837 | const struct nlattr * const attr[]) | |
a7b4f989 | 1838 | { |
a6555365 | 1839 | struct ip_set_net *inst = ip_set_pernet(info->net); |
a7b4f989 | 1840 | struct ip_set *set; |
ca0f6a5c | 1841 | struct nlattr *tb[IPSET_ATTR_ADT_MAX + 1] = {}; |
a7b4f989 | 1842 | int ret = 0; |
22dad713 | 1843 | u32 lineno; |
a7b4f989 | 1844 | |
23c42a40 | 1845 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c JK |
1846 | !attr[IPSET_ATTR_SETNAME] || |
1847 | !attr[IPSET_ATTR_DATA] || | |
a7b4f989 JK |
1848 | !flag_nested(attr[IPSET_ATTR_DATA]))) |
1849 | return -IPSET_ERR_PROTOCOL; | |
1850 | ||
1785e8f4 | 1851 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
ca0f6a5c | 1852 | if (!set) |
a7b4f989 JK |
1853 | return -ENOENT; |
1854 | ||
12899756 JK |
1855 | if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA], |
1856 | set->type->adt_policy, NULL)) | |
a7b4f989 JK |
1857 | return -IPSET_ERR_PROTOCOL; |
1858 | ||
b57b2d1f | 1859 | rcu_read_lock_bh(); |
22dad713 | 1860 | ret = set->variant->uadt(set, tb, IPSET_TEST, &lineno, 0, 0); |
b57b2d1f | 1861 | rcu_read_unlock_bh(); |
a7b4f989 JK |
1862 | /* Userspace can't trigger element to be re-added */ |
1863 | if (ret == -EAGAIN) | |
1864 | ret = 1; | |
1865 | ||
0f1799ba | 1866 | return ret > 0 ? 0 : -IPSET_ERR_EXIST; |
a7b4f989 JK |
1867 | } |
1868 | ||
1869 | /* Get headed data of a set */ | |
1870 | ||
a6555365 PNA |
1871 | static int ip_set_header(struct sk_buff *skb, const struct nfnl_info *info, |
1872 | const struct nlattr * const attr[]) | |
a7b4f989 | 1873 | { |
a6555365 | 1874 | struct ip_set_net *inst = ip_set_pernet(info->net); |
a7b4f989 JK |
1875 | const struct ip_set *set; |
1876 | struct sk_buff *skb2; | |
1877 | struct nlmsghdr *nlh2; | |
a7b4f989 | 1878 | |
23c42a40 | 1879 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c | 1880 | !attr[IPSET_ATTR_SETNAME])) |
a7b4f989 JK |
1881 | return -IPSET_ERR_PROTOCOL; |
1882 | ||
1785e8f4 | 1883 | set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); |
ca0f6a5c | 1884 | if (!set) |
a7b4f989 | 1885 | return -ENOENT; |
a7b4f989 JK |
1886 | |
1887 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
ca0f6a5c | 1888 | if (!skb2) |
a7b4f989 JK |
1889 | return -ENOMEM; |
1890 | ||
a6555365 | 1891 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, info->nlh->nlmsg_seq, 0, |
a7b4f989 JK |
1892 | IPSET_CMD_HEADER); |
1893 | if (!nlh2) | |
1894 | goto nlmsg_failure; | |
23c42a40 | 1895 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, protocol(attr)) || |
7cf7899d DM |
1896 | nla_put_string(skb2, IPSET_ATTR_SETNAME, set->name) || |
1897 | nla_put_string(skb2, IPSET_ATTR_TYPENAME, set->type->name) || | |
1898 | nla_put_u8(skb2, IPSET_ATTR_FAMILY, set->family) || | |
1899 | nla_put_u8(skb2, IPSET_ATTR_REVISION, set->revision)) | |
1900 | goto nla_put_failure; | |
a7b4f989 JK |
1901 | nlmsg_end(skb2, nlh2); |
1902 | ||
e0241ae6 | 1903 | return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid); |
a7b4f989 JK |
1904 | |
1905 | nla_put_failure: | |
1906 | nlmsg_cancel(skb2, nlh2); | |
1907 | nlmsg_failure: | |
1908 | kfree_skb(skb2); | |
1909 | return -EMSGSIZE; | |
1910 | } | |
1911 | ||
1912 | /* Get type data */ | |
1913 | ||
1914 | static const struct nla_policy ip_set_type_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
1915 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
1916 | [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING, | |
1917 | .len = IPSET_MAXNAMELEN - 1 }, | |
1918 | [IPSET_ATTR_FAMILY] = { .type = NLA_U8 }, | |
1919 | }; | |
1920 | ||
a6555365 PNA |
1921 | static int ip_set_type(struct sk_buff *skb, const struct nfnl_info *info, |
1922 | const struct nlattr * const attr[]) | |
a7b4f989 JK |
1923 | { |
1924 | struct sk_buff *skb2; | |
1925 | struct nlmsghdr *nlh2; | |
1926 | u8 family, min, max; | |
1927 | const char *typename; | |
1928 | int ret = 0; | |
1929 | ||
23c42a40 | 1930 | if (unlikely(protocol_min_failed(attr) || |
ca0f6a5c JK |
1931 | !attr[IPSET_ATTR_TYPENAME] || |
1932 | !attr[IPSET_ATTR_FAMILY])) | |
a7b4f989 JK |
1933 | return -IPSET_ERR_PROTOCOL; |
1934 | ||
1935 | family = nla_get_u8(attr[IPSET_ATTR_FAMILY]); | |
1936 | typename = nla_data(attr[IPSET_ATTR_TYPENAME]); | |
1937 | ret = find_set_type_minmax(typename, family, &min, &max); | |
1938 | if (ret) | |
1939 | return ret; | |
1940 | ||
1941 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
ca0f6a5c | 1942 | if (!skb2) |
a7b4f989 JK |
1943 | return -ENOMEM; |
1944 | ||
a6555365 | 1945 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, info->nlh->nlmsg_seq, 0, |
a7b4f989 JK |
1946 | IPSET_CMD_TYPE); |
1947 | if (!nlh2) | |
1948 | goto nlmsg_failure; | |
23c42a40 | 1949 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, protocol(attr)) || |
7cf7899d DM |
1950 | nla_put_string(skb2, IPSET_ATTR_TYPENAME, typename) || |
1951 | nla_put_u8(skb2, IPSET_ATTR_FAMILY, family) || | |
1952 | nla_put_u8(skb2, IPSET_ATTR_REVISION, max) || | |
1953 | nla_put_u8(skb2, IPSET_ATTR_REVISION_MIN, min)) | |
1954 | goto nla_put_failure; | |
a7b4f989 JK |
1955 | nlmsg_end(skb2, nlh2); |
1956 | ||
1957 | pr_debug("Send TYPE, nlmsg_len: %u\n", nlh2->nlmsg_len); | |
e0241ae6 | 1958 | return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid); |
a7b4f989 JK |
1959 | |
1960 | nla_put_failure: | |
1961 | nlmsg_cancel(skb2, nlh2); | |
1962 | nlmsg_failure: | |
1963 | kfree_skb(skb2); | |
1964 | return -EMSGSIZE; | |
1965 | } | |
1966 | ||
1967 | /* Get protocol version */ | |
1968 | ||
1969 | static const struct nla_policy | |
1970 | ip_set_protocol_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
1971 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
1972 | }; | |
1973 | ||
a6555365 PNA |
1974 | static int ip_set_protocol(struct sk_buff *skb, const struct nfnl_info *info, |
1975 | const struct nlattr * const attr[]) | |
a7b4f989 JK |
1976 | { |
1977 | struct sk_buff *skb2; | |
1978 | struct nlmsghdr *nlh2; | |
a7b4f989 | 1979 | |
ca0f6a5c | 1980 | if (unlikely(!attr[IPSET_ATTR_PROTOCOL])) |
a7b4f989 JK |
1981 | return -IPSET_ERR_PROTOCOL; |
1982 | ||
1983 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
ca0f6a5c | 1984 | if (!skb2) |
a7b4f989 JK |
1985 | return -ENOMEM; |
1986 | ||
a6555365 | 1987 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, info->nlh->nlmsg_seq, 0, |
a7b4f989 JK |
1988 | IPSET_CMD_PROTOCOL); |
1989 | if (!nlh2) | |
1990 | goto nlmsg_failure; | |
7cf7899d DM |
1991 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL)) |
1992 | goto nla_put_failure; | |
23c42a40 JK |
1993 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL_MIN, IPSET_PROTOCOL_MIN)) |
1994 | goto nla_put_failure; | |
1995 | nlmsg_end(skb2, nlh2); | |
1996 | ||
e0241ae6 | 1997 | return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid); |
23c42a40 JK |
1998 | |
1999 | nla_put_failure: | |
2000 | nlmsg_cancel(skb2, nlh2); | |
2001 | nlmsg_failure: | |
2002 | kfree_skb(skb2); | |
2003 | return -EMSGSIZE; | |
2004 | } | |
2005 | ||
2006 | /* Get set by name or index, from userspace */ | |
2007 | ||
a6555365 PNA |
2008 | static int ip_set_byname(struct sk_buff *skb, const struct nfnl_info *info, |
2009 | const struct nlattr * const attr[]) | |
23c42a40 | 2010 | { |
a6555365 | 2011 | struct ip_set_net *inst = ip_set_pernet(info->net); |
23c42a40 JK |
2012 | struct sk_buff *skb2; |
2013 | struct nlmsghdr *nlh2; | |
2014 | ip_set_id_t id = IPSET_INVALID_ID; | |
2015 | const struct ip_set *set; | |
23c42a40 JK |
2016 | |
2017 | if (unlikely(protocol_failed(attr) || | |
2018 | !attr[IPSET_ATTR_SETNAME])) | |
2019 | return -IPSET_ERR_PROTOCOL; | |
2020 | ||
2021 | set = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), &id); | |
2022 | if (id == IPSET_INVALID_ID) | |
2023 | return -ENOENT; | |
2024 | ||
2025 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2026 | if (!skb2) | |
2027 | return -ENOMEM; | |
2028 | ||
a6555365 | 2029 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, info->nlh->nlmsg_seq, 0, |
23c42a40 JK |
2030 | IPSET_CMD_GET_BYNAME); |
2031 | if (!nlh2) | |
2032 | goto nlmsg_failure; | |
2033 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, protocol(attr)) || | |
2034 | nla_put_u8(skb2, IPSET_ATTR_FAMILY, set->family) || | |
2035 | nla_put_net16(skb2, IPSET_ATTR_INDEX, htons(id))) | |
2036 | goto nla_put_failure; | |
2037 | nlmsg_end(skb2, nlh2); | |
2038 | ||
e0241ae6 | 2039 | return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid); |
23c42a40 JK |
2040 | |
2041 | nla_put_failure: | |
2042 | nlmsg_cancel(skb2, nlh2); | |
2043 | nlmsg_failure: | |
2044 | kfree_skb(skb2); | |
2045 | return -EMSGSIZE; | |
2046 | } | |
2047 | ||
2048 | static const struct nla_policy ip_set_index_policy[IPSET_ATTR_CMD_MAX + 1] = { | |
2049 | [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 }, | |
2050 | [IPSET_ATTR_INDEX] = { .type = NLA_U16 }, | |
2051 | }; | |
2052 | ||
a6555365 PNA |
2053 | static int ip_set_byindex(struct sk_buff *skb, const struct nfnl_info *info, |
2054 | const struct nlattr * const attr[]) | |
23c42a40 | 2055 | { |
a6555365 | 2056 | struct ip_set_net *inst = ip_set_pernet(info->net); |
23c42a40 JK |
2057 | struct sk_buff *skb2; |
2058 | struct nlmsghdr *nlh2; | |
2059 | ip_set_id_t id = IPSET_INVALID_ID; | |
2060 | const struct ip_set *set; | |
23c42a40 JK |
2061 | |
2062 | if (unlikely(protocol_failed(attr) || | |
2063 | !attr[IPSET_ATTR_INDEX])) | |
2064 | return -IPSET_ERR_PROTOCOL; | |
2065 | ||
2066 | id = ip_set_get_h16(attr[IPSET_ATTR_INDEX]); | |
2067 | if (id >= inst->ip_set_max) | |
2068 | return -ENOENT; | |
2069 | set = ip_set(inst, id); | |
2070 | if (set == NULL) | |
2071 | return -ENOENT; | |
2072 | ||
2073 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2074 | if (!skb2) | |
2075 | return -ENOMEM; | |
2076 | ||
a6555365 | 2077 | nlh2 = start_msg(skb2, NETLINK_CB(skb).portid, info->nlh->nlmsg_seq, 0, |
23c42a40 JK |
2078 | IPSET_CMD_GET_BYINDEX); |
2079 | if (!nlh2) | |
2080 | goto nlmsg_failure; | |
2081 | if (nla_put_u8(skb2, IPSET_ATTR_PROTOCOL, protocol(attr)) || | |
8e350ce1 | 2082 | nla_put_string(skb2, IPSET_ATTR_SETNAME, set->name)) |
23c42a40 | 2083 | goto nla_put_failure; |
a7b4f989 JK |
2084 | nlmsg_end(skb2, nlh2); |
2085 | ||
e0241ae6 | 2086 | return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid); |
a7b4f989 JK |
2087 | |
2088 | nla_put_failure: | |
2089 | nlmsg_cancel(skb2, nlh2); | |
2090 | nlmsg_failure: | |
2091 | kfree_skb(skb2); | |
2092 | return -EMSGSIZE; | |
2093 | } | |
2094 | ||
2095 | static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = { | |
d31f4d44 TB |
2096 | [IPSET_CMD_NONE] = { |
2097 | .call = ip_set_none, | |
50f2db9e | 2098 | .type = NFNL_CB_MUTEX, |
d31f4d44 TB |
2099 | .attr_count = IPSET_ATTR_CMD_MAX, |
2100 | }, | |
a7b4f989 JK |
2101 | [IPSET_CMD_CREATE] = { |
2102 | .call = ip_set_create, | |
50f2db9e | 2103 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2104 | .attr_count = IPSET_ATTR_CMD_MAX, |
2105 | .policy = ip_set_create_policy, | |
2106 | }, | |
2107 | [IPSET_CMD_DESTROY] = { | |
2108 | .call = ip_set_destroy, | |
50f2db9e | 2109 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2110 | .attr_count = IPSET_ATTR_CMD_MAX, |
2111 | .policy = ip_set_setname_policy, | |
2112 | }, | |
2113 | [IPSET_CMD_FLUSH] = { | |
2114 | .call = ip_set_flush, | |
50f2db9e | 2115 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2116 | .attr_count = IPSET_ATTR_CMD_MAX, |
2117 | .policy = ip_set_setname_policy, | |
2118 | }, | |
2119 | [IPSET_CMD_RENAME] = { | |
2120 | .call = ip_set_rename, | |
50f2db9e | 2121 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2122 | .attr_count = IPSET_ATTR_CMD_MAX, |
2123 | .policy = ip_set_setname2_policy, | |
2124 | }, | |
2125 | [IPSET_CMD_SWAP] = { | |
2126 | .call = ip_set_swap, | |
50f2db9e | 2127 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2128 | .attr_count = IPSET_ATTR_CMD_MAX, |
2129 | .policy = ip_set_setname2_policy, | |
2130 | }, | |
2131 | [IPSET_CMD_LIST] = { | |
2132 | .call = ip_set_dump, | |
50f2db9e | 2133 | .type = NFNL_CB_MUTEX, |
a7b4f989 | 2134 | .attr_count = IPSET_ATTR_CMD_MAX, |
12899756 | 2135 | .policy = ip_set_dump_policy, |
a7b4f989 JK |
2136 | }, |
2137 | [IPSET_CMD_SAVE] = { | |
2138 | .call = ip_set_dump, | |
50f2db9e | 2139 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2140 | .attr_count = IPSET_ATTR_CMD_MAX, |
2141 | .policy = ip_set_setname_policy, | |
2142 | }, | |
2143 | [IPSET_CMD_ADD] = { | |
2144 | .call = ip_set_uadd, | |
50f2db9e | 2145 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2146 | .attr_count = IPSET_ATTR_CMD_MAX, |
2147 | .policy = ip_set_adt_policy, | |
2148 | }, | |
2149 | [IPSET_CMD_DEL] = { | |
2150 | .call = ip_set_udel, | |
50f2db9e | 2151 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2152 | .attr_count = IPSET_ATTR_CMD_MAX, |
2153 | .policy = ip_set_adt_policy, | |
2154 | }, | |
2155 | [IPSET_CMD_TEST] = { | |
2156 | .call = ip_set_utest, | |
50f2db9e | 2157 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2158 | .attr_count = IPSET_ATTR_CMD_MAX, |
2159 | .policy = ip_set_adt_policy, | |
2160 | }, | |
2161 | [IPSET_CMD_HEADER] = { | |
2162 | .call = ip_set_header, | |
50f2db9e | 2163 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2164 | .attr_count = IPSET_ATTR_CMD_MAX, |
2165 | .policy = ip_set_setname_policy, | |
2166 | }, | |
2167 | [IPSET_CMD_TYPE] = { | |
2168 | .call = ip_set_type, | |
50f2db9e | 2169 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2170 | .attr_count = IPSET_ATTR_CMD_MAX, |
2171 | .policy = ip_set_type_policy, | |
2172 | }, | |
2173 | [IPSET_CMD_PROTOCOL] = { | |
2174 | .call = ip_set_protocol, | |
50f2db9e | 2175 | .type = NFNL_CB_MUTEX, |
a7b4f989 JK |
2176 | .attr_count = IPSET_ATTR_CMD_MAX, |
2177 | .policy = ip_set_protocol_policy, | |
2178 | }, | |
23c42a40 JK |
2179 | [IPSET_CMD_GET_BYNAME] = { |
2180 | .call = ip_set_byname, | |
50f2db9e | 2181 | .type = NFNL_CB_MUTEX, |
23c42a40 JK |
2182 | .attr_count = IPSET_ATTR_CMD_MAX, |
2183 | .policy = ip_set_setname_policy, | |
2184 | }, | |
2185 | [IPSET_CMD_GET_BYINDEX] = { | |
2186 | .call = ip_set_byindex, | |
50f2db9e | 2187 | .type = NFNL_CB_MUTEX, |
23c42a40 JK |
2188 | .attr_count = IPSET_ATTR_CMD_MAX, |
2189 | .policy = ip_set_index_policy, | |
2190 | }, | |
a7b4f989 JK |
2191 | }; |
2192 | ||
2193 | static struct nfnetlink_subsystem ip_set_netlink_subsys __read_mostly = { | |
2194 | .name = "ip_set", | |
2195 | .subsys_id = NFNL_SUBSYS_IPSET, | |
2196 | .cb_count = IPSET_MSG_MAX, | |
2197 | .cb = ip_set_netlink_subsys_cb, | |
2198 | }; | |
2199 | ||
2200 | /* Interface to iptables/ip6tables */ | |
2201 | ||
2202 | static int | |
2203 | ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) | |
2204 | { | |
95c96174 | 2205 | unsigned int *op; |
a7b4f989 JK |
2206 | void *data; |
2207 | int copylen = *len, ret = 0; | |
1785e8f4 VL |
2208 | struct net *net = sock_net(sk); |
2209 | struct ip_set_net *inst = ip_set_pernet(net); | |
a7b4f989 | 2210 | |
1785e8f4 | 2211 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
a7b4f989 JK |
2212 | return -EPERM; |
2213 | if (optval != SO_IP_SET) | |
2214 | return -EBADF; | |
95c96174 | 2215 | if (*len < sizeof(unsigned int)) |
a7b4f989 JK |
2216 | return -EINVAL; |
2217 | ||
2218 | data = vmalloc(*len); | |
2219 | if (!data) | |
2220 | return -ENOMEM; | |
2221 | if (copy_from_user(data, user, *len) != 0) { | |
2222 | ret = -EFAULT; | |
2223 | goto done; | |
2224 | } | |
68ad546a | 2225 | op = data; |
a7b4f989 JK |
2226 | |
2227 | if (*op < IP_SET_OP_VERSION) { | |
2228 | /* Check the version at the beginning of operations */ | |
2229 | struct ip_set_req_version *req_version = data; | |
2196937e DC |
2230 | |
2231 | if (*len < sizeof(struct ip_set_req_version)) { | |
2232 | ret = -EINVAL; | |
2233 | goto done; | |
2234 | } | |
2235 | ||
23c42a40 | 2236 | if (req_version->version < IPSET_PROTOCOL_MIN) { |
a7b4f989 JK |
2237 | ret = -EPROTO; |
2238 | goto done; | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | switch (*op) { | |
2243 | case IP_SET_OP_VERSION: { | |
2244 | struct ip_set_req_version *req_version = data; | |
2245 | ||
2246 | if (*len != sizeof(struct ip_set_req_version)) { | |
2247 | ret = -EINVAL; | |
2248 | goto done; | |
2249 | } | |
2250 | ||
2251 | req_version->version = IPSET_PROTOCOL; | |
30b7244d DC |
2252 | if (copy_to_user(user, req_version, |
2253 | sizeof(struct ip_set_req_version))) | |
2254 | ret = -EFAULT; | |
a7b4f989 JK |
2255 | goto done; |
2256 | } | |
2257 | case IP_SET_OP_GET_BYNAME: { | |
2258 | struct ip_set_req_get_set *req_get = data; | |
9076aea7 | 2259 | ip_set_id_t id; |
a7b4f989 JK |
2260 | |
2261 | if (*len != sizeof(struct ip_set_req_get_set)) { | |
2262 | ret = -EINVAL; | |
2263 | goto done; | |
2264 | } | |
2265 | req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0'; | |
c14b78e7 | 2266 | nfnl_lock(NFNL_SUBSYS_IPSET); |
1785e8f4 | 2267 | find_set_and_id(inst, req_get->set.name, &id); |
9076aea7 | 2268 | req_get->set.index = id; |
c14b78e7 | 2269 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
a7b4f989 JK |
2270 | goto copy; |
2271 | } | |
5e04c0c3 JK |
2272 | case IP_SET_OP_GET_FNAME: { |
2273 | struct ip_set_req_get_set_family *req_get = data; | |
2274 | ip_set_id_t id; | |
2275 | ||
2276 | if (*len != sizeof(struct ip_set_req_get_set_family)) { | |
2277 | ret = -EINVAL; | |
2278 | goto done; | |
2279 | } | |
2280 | req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0'; | |
2281 | nfnl_lock(NFNL_SUBSYS_IPSET); | |
1785e8f4 | 2282 | find_set_and_id(inst, req_get->set.name, &id); |
5e04c0c3 JK |
2283 | req_get->set.index = id; |
2284 | if (id != IPSET_INVALID_ID) | |
3e90ebd3 | 2285 | req_get->family = ip_set(inst, id)->family; |
5e04c0c3 JK |
2286 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
2287 | goto copy; | |
2288 | } | |
a7b4f989 JK |
2289 | case IP_SET_OP_GET_BYINDEX: { |
2290 | struct ip_set_req_get_set *req_get = data; | |
9076aea7 | 2291 | struct ip_set *set; |
a7b4f989 JK |
2292 | |
2293 | if (*len != sizeof(struct ip_set_req_get_set) || | |
1785e8f4 | 2294 | req_get->set.index >= inst->ip_set_max) { |
a7b4f989 JK |
2295 | ret = -EINVAL; |
2296 | goto done; | |
2297 | } | |
c14b78e7 | 2298 | nfnl_lock(NFNL_SUBSYS_IPSET); |
3e90ebd3 | 2299 | set = ip_set(inst, req_get->set.index); |
00ec3ab0 QC |
2300 | ret = strscpy(req_get->set.name, set ? set->name : "", |
2301 | IPSET_MAXNAMELEN); | |
c14b78e7 | 2302 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
00ec3ab0 QC |
2303 | if (ret < 0) |
2304 | goto done; | |
a7b4f989 JK |
2305 | goto copy; |
2306 | } | |
2307 | default: | |
2308 | ret = -EBADMSG; | |
2309 | goto done; | |
2310 | } /* end of switch(op) */ | |
2311 | ||
2312 | copy: | |
30b7244d DC |
2313 | if (copy_to_user(user, data, copylen)) |
2314 | ret = -EFAULT; | |
a7b4f989 JK |
2315 | |
2316 | done: | |
2317 | vfree(data); | |
2318 | if (ret > 0) | |
2319 | ret = 0; | |
2320 | return ret; | |
2321 | } | |
2322 | ||
2323 | static struct nf_sockopt_ops so_set __read_mostly = { | |
2324 | .pf = PF_INET, | |
2325 | .get_optmin = SO_IP_SET, | |
2326 | .get_optmax = SO_IP_SET + 1, | |
d4ef3835 | 2327 | .get = ip_set_sockfn_get, |
a7b4f989 JK |
2328 | .owner = THIS_MODULE, |
2329 | }; | |
2330 | ||
1785e8f4 VL |
2331 | static int __net_init |
2332 | ip_set_net_init(struct net *net) | |
a7b4f989 | 2333 | { |
1785e8f4 | 2334 | struct ip_set_net *inst = ip_set_pernet(net); |
9076aea7 | 2335 | struct ip_set **list; |
a7b4f989 | 2336 | |
1785e8f4 VL |
2337 | inst->ip_set_max = max_sets ? max_sets : CONFIG_IP_SET_MAX; |
2338 | if (inst->ip_set_max >= IPSET_INVALID_ID) | |
2339 | inst->ip_set_max = IPSET_INVALID_ID - 1; | |
a7b4f989 | 2340 | |
ed956f39 | 2341 | list = kvcalloc(inst->ip_set_max, sizeof(struct ip_set *), GFP_KERNEL); |
9076aea7 | 2342 | if (!list) |
a7b4f989 | 2343 | return -ENOMEM; |
9c1ba5c8 JK |
2344 | inst->is_deleted = false; |
2345 | inst->is_destroyed = false; | |
1785e8f4 | 2346 | rcu_assign_pointer(inst->ip_set_list, list); |
1785e8f4 VL |
2347 | return 0; |
2348 | } | |
2349 | ||
2350 | static void __net_exit | |
2351 | ip_set_net_exit(struct net *net) | |
2352 | { | |
2353 | struct ip_set_net *inst = ip_set_pernet(net); | |
2354 | ||
2355 | struct ip_set *set = NULL; | |
2356 | ip_set_id_t i; | |
2357 | ||
9c1ba5c8 | 2358 | inst->is_deleted = true; /* flag for ip_set_nfnl_put */ |
1785e8f4 | 2359 | |
f998b6b1 | 2360 | nfnl_lock(NFNL_SUBSYS_IPSET); |
1785e8f4 | 2361 | for (i = 0; i < inst->ip_set_max; i++) { |
3e90ebd3 | 2362 | set = ip_set(inst, i); |
9c1ba5c8 JK |
2363 | if (set) { |
2364 | ip_set(inst, i) = NULL; | |
2365 | ip_set_destroy_set(set); | |
2366 | } | |
1785e8f4 | 2367 | } |
f998b6b1 | 2368 | nfnl_unlock(NFNL_SUBSYS_IPSET); |
ed956f39 | 2369 | kvfree(rcu_dereference_protected(inst->ip_set_list, 1)); |
1785e8f4 VL |
2370 | } |
2371 | ||
2372 | static struct pernet_operations ip_set_net_ops = { | |
2373 | .init = ip_set_net_init, | |
2374 | .exit = ip_set_net_exit, | |
2375 | .id = &ip_set_net_id, | |
a5a179b6 | 2376 | .size = sizeof(struct ip_set_net), |
1785e8f4 VL |
2377 | }; |
2378 | ||
1785e8f4 VL |
2379 | static int __init |
2380 | ip_set_init(void) | |
2381 | { | |
e23ed762 | 2382 | int ret = register_pernet_subsys(&ip_set_net_ops); |
ca0f6a5c | 2383 | |
e23ed762 FW |
2384 | if (ret) { |
2385 | pr_err("ip_set: cannot register pernet_subsys.\n"); | |
2386 | return ret; | |
2387 | } | |
2388 | ||
2389 | ret = nfnetlink_subsys_register(&ip_set_netlink_subsys); | |
a7b4f989 JK |
2390 | if (ret != 0) { |
2391 | pr_err("ip_set: cannot register with nfnetlink.\n"); | |
e23ed762 | 2392 | unregister_pernet_subsys(&ip_set_net_ops); |
a7b4f989 JK |
2393 | return ret; |
2394 | } | |
e23ed762 | 2395 | |
a7b4f989 JK |
2396 | ret = nf_register_sockopt(&so_set); |
2397 | if (ret != 0) { | |
2398 | pr_err("SO_SET registry failed: %d\n", ret); | |
2399 | nfnetlink_subsys_unregister(&ip_set_netlink_subsys); | |
e23ed762 | 2400 | unregister_pernet_subsys(&ip_set_net_ops); |
a7b4f989 JK |
2401 | return ret; |
2402 | } | |
e23ed762 | 2403 | |
a7b4f989 JK |
2404 | return 0; |
2405 | } | |
2406 | ||
2407 | static void __exit | |
2408 | ip_set_fini(void) | |
2409 | { | |
a7b4f989 JK |
2410 | nf_unregister_sockopt(&so_set); |
2411 | nfnetlink_subsys_unregister(&ip_set_netlink_subsys); | |
e23ed762 FW |
2412 | |
2413 | unregister_pernet_subsys(&ip_set_net_ops); | |
a7b4f989 JK |
2414 | pr_debug("these are the famous last words\n"); |
2415 | } | |
2416 | ||
2417 | module_init(ip_set_init); | |
2418 | module_exit(ip_set_fini); | |
e5531166 PNA |
2419 | |
2420 | MODULE_DESCRIPTION("ip_set: protocol " __stringify(IPSET_PROTOCOL)); |