1 /* Copyright (C) 2000-2002 Joakim Axelsson <gozem@linux.nu>
2 * Patrick Schaaf <bof@bof.de>
3 * Copyright (C) 2003-2011 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 /* Kernel module for IP set management */
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
16 #include <linux/skbuff.h>
17 #include <linux/spinlock.h>
18 #include <linux/netlink.h>
19 #include <linux/rculist.h>
20 #include <linux/version.h>
21 #include <net/netlink.h>
23 #include <linux/netfilter.h>
24 #include <linux/netfilter/nfnetlink.h>
25 #include <linux/netfilter/ipset/ip_set.h>
27 static LIST_HEAD(ip_set_type_list); /* all registered set types */
28 static DEFINE_MUTEX(ip_set_type_mutex); /* protects ip_set_type_list */
29 static DEFINE_RWLOCK(ip_set_ref_lock); /* protects the set refs */
31 static struct ip_set **ip_set_list; /* all individual sets */
32 static ip_set_id_t ip_set_max = CONFIG_IP_SET_MAX; /* max number of sets */
34 #define STREQ(a, b) (strncmp(a, b, IPSET_MAXNAMELEN) == 0)
36 static unsigned int max_sets;
38 module_param(max_sets, int, 0600);
39 MODULE_PARM_DESC(max_sets, "maximal number of sets");
40 MODULE_LICENSE("GPL");
41 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
42 MODULE_DESCRIPTION("core IP set support");
43 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET);
46 * The set types are implemented in modules and registered set types
47 * can be found in ip_set_type_list. Adding/deleting types is
48 * serialized by ip_set_type_mutex.
52 ip_set_type_lock(void)
54 mutex_lock(&ip_set_type_mutex);
58 ip_set_type_unlock(void)
60 mutex_unlock(&ip_set_type_mutex);
63 /* Register and deregister settype */
65 static struct ip_set_type *
66 find_set_type(const char *name, u8 family, u8 revision)
68 struct ip_set_type *type;
70 list_for_each_entry_rcu(type, &ip_set_type_list, list)
71 if (STREQ(type->name, name) &&
72 (type->family == family || type->family == AF_UNSPEC) &&
73 type->revision == revision)
78 /* Unlock, try to load a set type module and lock again */
80 try_to_load_type(const char *name)
83 pr_debug("try to load ip_set_%s\n", name);
84 if (request_module("ip_set_%s", name) < 0) {
85 pr_warning("Can't find ip_set type %s\n", name);
87 return -IPSET_ERR_FIND_TYPE;
93 /* Find a set type and reference it */
95 find_set_type_get(const char *name, u8 family, u8 revision,
96 struct ip_set_type **found)
98 struct ip_set_type *type;
102 *found = find_set_type(name, family, revision);
104 err = !try_module_get((*found)->me) ? -EFAULT : 0;
107 /* Make sure the type is loaded but we don't support the revision */
108 list_for_each_entry_rcu(type, &ip_set_type_list, list)
109 if (STREQ(type->name, name)) {
110 err = -IPSET_ERR_FIND_TYPE;
115 return try_to_load_type(name);
122 /* Find a given set type by name and family.
123 * If we succeeded, the supported minimal and maximum revisions are
127 find_set_type_minmax(const char *name, u8 family, u8 *min, u8 *max)
129 struct ip_set_type *type;
132 *min = 255; *max = 0;
134 list_for_each_entry_rcu(type, &ip_set_type_list, list)
135 if (STREQ(type->name, name) &&
136 (type->family == family || type->family == AF_UNSPEC)) {
138 if (type->revision < *min)
139 *min = type->revision;
140 if (type->revision > *max)
141 *max = type->revision;
147 return try_to_load_type(name);
150 #define family_name(f) ((f) == AF_INET ? "inet" : \
151 (f) == AF_INET6 ? "inet6" : "any")
153 /* Register a set type structure. The type is identified by
154 * the unique triple of name, family and revision.
157 ip_set_type_register(struct ip_set_type *type)
161 if (type->protocol != IPSET_PROTOCOL) {
162 pr_warning("ip_set type %s, family %s, revision %u uses "
163 "wrong protocol version %u (want %u)\n",
164 type->name, family_name(type->family),
165 type->revision, type->protocol, IPSET_PROTOCOL);
170 if (find_set_type(type->name, type->family, type->revision)) {
172 pr_warning("ip_set type %s, family %s, revision %u "
173 "already registered!\n", type->name,
174 family_name(type->family), type->revision);
178 list_add_rcu(&type->list, &ip_set_type_list);
179 pr_debug("type %s, family %s, revision %u registered.\n",
180 type->name, family_name(type->family), type->revision);
182 ip_set_type_unlock();
185 EXPORT_SYMBOL_GPL(ip_set_type_register);
187 /* Unregister a set type. There's a small race with ip_set_create */
189 ip_set_type_unregister(struct ip_set_type *type)
192 if (!find_set_type(type->name, type->family, type->revision)) {
193 pr_warning("ip_set type %s, family %s, revision %u "
194 "not registered\n", type->name,
195 family_name(type->family), type->revision);
198 list_del_rcu(&type->list);
199 pr_debug("type %s, family %s, revision %u unregistered.\n",
200 type->name, family_name(type->family), type->revision);
202 ip_set_type_unlock();
206 EXPORT_SYMBOL_GPL(ip_set_type_unregister);
208 /* Utility functions */
210 ip_set_alloc(size_t size)
212 void *members = NULL;
214 if (size < KMALLOC_MAX_SIZE)
215 members = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
218 pr_debug("%p: allocated with kmalloc\n", members);
222 members = vzalloc(size);
225 pr_debug("%p: allocated with vmalloc\n", members);
229 EXPORT_SYMBOL_GPL(ip_set_alloc);
232 ip_set_free(void *members)
234 pr_debug("%p: free with %s\n", members,
235 is_vmalloc_addr(members) ? "vfree" : "kfree");
236 if (is_vmalloc_addr(members))
241 EXPORT_SYMBOL_GPL(ip_set_free);
244 flag_nested(const struct nlattr *nla)
246 return nla->nla_type & NLA_F_NESTED;
249 static const struct nla_policy ipaddr_policy[IPSET_ATTR_IPADDR_MAX + 1] = {
250 [IPSET_ATTR_IPADDR_IPV4] = { .type = NLA_U32 },
251 [IPSET_ATTR_IPADDR_IPV6] = { .type = NLA_BINARY,
252 .len = sizeof(struct in6_addr) },
256 ip_set_get_ipaddr4(struct nlattr *nla, __be32 *ipaddr)
258 struct nlattr *tb[IPSET_ATTR_IPADDR_MAX+1];
260 if (unlikely(!flag_nested(nla)))
261 return -IPSET_ERR_PROTOCOL;
262 if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy))
263 return -IPSET_ERR_PROTOCOL;
264 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV4)))
265 return -IPSET_ERR_PROTOCOL;
267 *ipaddr = nla_get_be32(tb[IPSET_ATTR_IPADDR_IPV4]);
270 EXPORT_SYMBOL_GPL(ip_set_get_ipaddr4);
273 ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr)
275 struct nlattr *tb[IPSET_ATTR_IPADDR_MAX+1];
277 if (unlikely(!flag_nested(nla)))
278 return -IPSET_ERR_PROTOCOL;
280 if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy))
281 return -IPSET_ERR_PROTOCOL;
282 if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV6)))
283 return -IPSET_ERR_PROTOCOL;
285 memcpy(ipaddr, nla_data(tb[IPSET_ATTR_IPADDR_IPV6]),
286 sizeof(struct in6_addr));
289 EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6);
292 * Creating/destroying/renaming/swapping affect the existence and
293 * the properties of a set. All of these can be executed from userspace
294 * only and serialized by the nfnl mutex indirectly from nfnetlink.
296 * Sets are identified by their index in ip_set_list and the index
297 * is used by the external references (set/SET netfilter modules).
299 * The set behind an index may change by swapping only, from userspace.
303 __ip_set_get(ip_set_id_t index)
305 write_lock_bh(&ip_set_ref_lock);
306 ip_set_list[index]->ref++;
307 write_unlock_bh(&ip_set_ref_lock);
311 __ip_set_put(ip_set_id_t index)
313 write_lock_bh(&ip_set_ref_lock);
314 BUG_ON(ip_set_list[index]->ref == 0);
315 ip_set_list[index]->ref--;
316 write_unlock_bh(&ip_set_ref_lock);
320 * Add, del and test set entries from kernel.
322 * The set behind the index must exist and must be referenced
323 * so it can't be destroyed (or changed) under our foot.
327 ip_set_test(ip_set_id_t index, const struct sk_buff *skb,
328 u8 family, u8 dim, u8 flags)
330 struct ip_set *set = ip_set_list[index];
334 pr_debug("set %s, index %u\n", set->name, index);
336 if (dim < set->type->dimension ||
337 !(family == set->family || set->family == AF_UNSPEC))
340 read_lock_bh(&set->lock);
341 ret = set->variant->kadt(set, skb, IPSET_TEST, family, dim, flags);
342 read_unlock_bh(&set->lock);
344 if (ret == -EAGAIN) {
345 /* Type requests element to be completed */
346 pr_debug("element must be competed, ADD is triggered\n");
347 write_lock_bh(&set->lock);
348 set->variant->kadt(set, skb, IPSET_ADD, family, dim, flags);
349 write_unlock_bh(&set->lock);
353 /* Convert error codes to nomatch */
354 return (ret < 0 ? 0 : ret);
356 EXPORT_SYMBOL_GPL(ip_set_test);
359 ip_set_add(ip_set_id_t index, const struct sk_buff *skb,
360 u8 family, u8 dim, u8 flags)
362 struct ip_set *set = ip_set_list[index];
366 pr_debug("set %s, index %u\n", set->name, index);
368 if (dim < set->type->dimension ||
369 !(family == set->family || set->family == AF_UNSPEC))
372 write_lock_bh(&set->lock);
373 ret = set->variant->kadt(set, skb, IPSET_ADD, family, dim, flags);
374 write_unlock_bh(&set->lock);
378 EXPORT_SYMBOL_GPL(ip_set_add);
381 ip_set_del(ip_set_id_t index, const struct sk_buff *skb,
382 u8 family, u8 dim, u8 flags)
384 struct ip_set *set = ip_set_list[index];
388 pr_debug("set %s, index %u\n", set->name, index);
390 if (dim < set->type->dimension ||
391 !(family == set->family || set->family == AF_UNSPEC))
394 write_lock_bh(&set->lock);
395 ret = set->variant->kadt(set, skb, IPSET_DEL, family, dim, flags);
396 write_unlock_bh(&set->lock);
400 EXPORT_SYMBOL_GPL(ip_set_del);
403 * Find set by name, reference it once. The reference makes sure the
404 * thing pointed to, does not go away under our feet.
408 ip_set_get_byname(const char *name, struct ip_set **set)
410 ip_set_id_t i, index = IPSET_INVALID_ID;
413 for (i = 0; i < ip_set_max; i++) {
415 if (s != NULL && STREQ(s->name, name)) {
424 EXPORT_SYMBOL_GPL(ip_set_get_byname);
427 * If the given set pointer points to a valid set, decrement
428 * reference count by 1. The caller shall not assume the index
429 * to be valid, after calling this function.
433 ip_set_put_byindex(ip_set_id_t index)
435 if (ip_set_list[index] != NULL)
438 EXPORT_SYMBOL_GPL(ip_set_put_byindex);
441 * Get the name of a set behind a set index.
442 * We assume the set is referenced, so it does exist and
443 * can't be destroyed. The set cannot be renamed due to
444 * the referencing either.
448 ip_set_name_byindex(ip_set_id_t index)
450 const struct ip_set *set = ip_set_list[index];
453 BUG_ON(set->ref == 0);
455 /* Referenced, so it's safe */
458 EXPORT_SYMBOL_GPL(ip_set_name_byindex);
461 * Routines to call by external subsystems, which do not
462 * call nfnl_lock for us.
466 * Find set by name, reference it once. The reference makes sure the
467 * thing pointed to, does not go away under our feet.
469 * The nfnl mutex is used in the function.
472 ip_set_nfnl_get(const char *name)
478 index = ip_set_get_byname(name, &s);
483 EXPORT_SYMBOL_GPL(ip_set_nfnl_get);
486 * Find set by index, reference it once. The reference makes sure the
487 * thing pointed to, does not go away under our feet.
489 * The nfnl mutex is used in the function.
492 ip_set_nfnl_get_byindex(ip_set_id_t index)
494 if (index > ip_set_max)
495 return IPSET_INVALID_ID;
498 if (ip_set_list[index])
501 index = IPSET_INVALID_ID;
506 EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex);
509 * If the given set pointer points to a valid set, decrement
510 * reference count by 1. The caller shall not assume the index
511 * to be valid, after calling this function.
513 * The nfnl mutex is used in the function.
516 ip_set_nfnl_put(ip_set_id_t index)
519 ip_set_put_byindex(index);
522 EXPORT_SYMBOL_GPL(ip_set_nfnl_put);
525 * Communication protocol with userspace over netlink.
527 * The commands are serialized by the nfnl mutex.
531 protocol_failed(const struct nlattr * const tb[])
533 return !tb[IPSET_ATTR_PROTOCOL] ||
534 nla_get_u8(tb[IPSET_ATTR_PROTOCOL]) != IPSET_PROTOCOL;
538 flag_exist(const struct nlmsghdr *nlh)
540 return nlh->nlmsg_flags & NLM_F_EXCL ? 0 : IPSET_FLAG_EXIST;
543 static struct nlmsghdr *
544 start_msg(struct sk_buff *skb, u32 pid, u32 seq, unsigned int flags,
547 struct nlmsghdr *nlh;
548 struct nfgenmsg *nfmsg;
550 nlh = nlmsg_put(skb, pid, seq, cmd | (NFNL_SUBSYS_IPSET << 8),
551 sizeof(*nfmsg), flags);
555 nfmsg = nlmsg_data(nlh);
556 nfmsg->nfgen_family = AF_INET;
557 nfmsg->version = NFNETLINK_V0;
565 static const struct nla_policy ip_set_create_policy[IPSET_ATTR_CMD_MAX + 1] = {
566 [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
567 [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
568 .len = IPSET_MAXNAMELEN - 1 },
569 [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING,
570 .len = IPSET_MAXNAMELEN - 1},
571 [IPSET_ATTR_REVISION] = { .type = NLA_U8 },
572 [IPSET_ATTR_FAMILY] = { .type = NLA_U8 },
573 [IPSET_ATTR_DATA] = { .type = NLA_NESTED },
577 find_set_id(const char *name)
579 ip_set_id_t i, index = IPSET_INVALID_ID;
580 const struct ip_set *set;
582 for (i = 0; index == IPSET_INVALID_ID && i < ip_set_max; i++) {
583 set = ip_set_list[i];
584 if (set != NULL && STREQ(set->name, name))
590 static inline struct ip_set *
591 find_set(const char *name)
593 ip_set_id_t index = find_set_id(name);
595 return index == IPSET_INVALID_ID ? NULL : ip_set_list[index];
599 find_free_id(const char *name, ip_set_id_t *index, struct ip_set **set)
603 *index = IPSET_INVALID_ID;
604 for (i = 0; i < ip_set_max; i++) {
605 if (ip_set_list[i] == NULL) {
606 if (*index == IPSET_INVALID_ID)
608 } else if (STREQ(name, ip_set_list[i]->name)) {
610 *set = ip_set_list[i];
614 if (*index == IPSET_INVALID_ID)
615 /* No free slot remained */
616 return -IPSET_ERR_MAX_SETS;
621 ip_set_create(struct sock *ctnl, struct sk_buff *skb,
622 const struct nlmsghdr *nlh,
623 const struct nlattr * const attr[])
625 struct ip_set *set, *clash = NULL;
626 ip_set_id_t index = IPSET_INVALID_ID;
627 struct nlattr *tb[IPSET_ATTR_CREATE_MAX+1] = {};
628 const char *name, *typename;
630 u32 flags = flag_exist(nlh);
633 if (unlikely(protocol_failed(attr) ||
634 attr[IPSET_ATTR_SETNAME] == NULL ||
635 attr[IPSET_ATTR_TYPENAME] == NULL ||
636 attr[IPSET_ATTR_REVISION] == NULL ||
637 attr[IPSET_ATTR_FAMILY] == NULL ||
638 (attr[IPSET_ATTR_DATA] != NULL &&
639 !flag_nested(attr[IPSET_ATTR_DATA]))))
640 return -IPSET_ERR_PROTOCOL;
642 name = nla_data(attr[IPSET_ATTR_SETNAME]);
643 typename = nla_data(attr[IPSET_ATTR_TYPENAME]);
644 family = nla_get_u8(attr[IPSET_ATTR_FAMILY]);
645 revision = nla_get_u8(attr[IPSET_ATTR_REVISION]);
646 pr_debug("setname: %s, typename: %s, family: %s, revision: %u\n",
647 name, typename, family_name(family), revision);
650 * First, and without any locks, allocate and initialize
651 * a normal base set structure.
653 set = kzalloc(sizeof(struct ip_set), GFP_KERNEL);
656 rwlock_init(&set->lock);
657 strlcpy(set->name, name, IPSET_MAXNAMELEN);
658 set->family = family;
661 * Next, check that we know the type, and take
662 * a reference on the type, to make sure it stays available
663 * while constructing our new set.
665 * After referencing the type, we try to create the type
666 * specific part of the set without holding any locks.
668 ret = find_set_type_get(typename, family, revision, &(set->type));
673 * Without holding any locks, create private part.
675 if (attr[IPSET_ATTR_DATA] &&
676 nla_parse_nested(tb, IPSET_ATTR_CREATE_MAX, attr[IPSET_ATTR_DATA],
677 set->type->create_policy)) {
678 ret = -IPSET_ERR_PROTOCOL;
682 ret = set->type->create(set, tb, flags);
686 /* BTW, ret==0 here. */
689 * Here, we have a valid, constructed set and we are protected
690 * by the nfnl mutex. Find the first free index in ip_set_list
691 * and check clashing.
693 if ((ret = find_free_id(set->name, &index, &clash)) != 0) {
694 /* If this is the same set and requested, ignore error */
695 if (ret == -EEXIST &&
696 (flags & IPSET_FLAG_EXIST) &&
697 STREQ(set->type->name, clash->type->name) &&
698 set->type->family == clash->type->family &&
699 set->type->revision == clash->type->revision &&
700 set->variant->same_set(set, clash))
706 * Finally! Add our shiny new set to the list, and be done.
708 pr_debug("create: '%s' created with index %u!\n", set->name, index);
709 ip_set_list[index] = set;
714 set->variant->destroy(set);
716 module_put(set->type->me);
724 static const struct nla_policy
725 ip_set_setname_policy[IPSET_ATTR_CMD_MAX + 1] = {
726 [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
727 [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
728 .len = IPSET_MAXNAMELEN - 1 },
732 ip_set_destroy_set(ip_set_id_t index)
734 struct ip_set *set = ip_set_list[index];
736 pr_debug("set: %s\n", set->name);
737 ip_set_list[index] = NULL;
739 /* Must call it without holding any lock */
740 set->variant->destroy(set);
741 module_put(set->type->me);
746 ip_set_destroy(struct sock *ctnl, struct sk_buff *skb,
747 const struct nlmsghdr *nlh,
748 const struct nlattr * const attr[])
753 if (unlikely(protocol_failed(attr)))
754 return -IPSET_ERR_PROTOCOL;
756 /* Commands are serialized and references are
757 * protected by the ip_set_ref_lock.
758 * External systems (i.e. xt_set) must call
759 * ip_set_put|get_nfnl_* functions, that way we
760 * can safely check references here.
762 * list:set timer can only decrement the reference
763 * counter, so if it's already zero, we can proceed
764 * without holding the lock.
766 read_lock_bh(&ip_set_ref_lock);
767 if (!attr[IPSET_ATTR_SETNAME]) {
768 for (i = 0; i < ip_set_max; i++) {
769 if (ip_set_list[i] != NULL && ip_set_list[i]->ref) {
770 ret = IPSET_ERR_BUSY;
774 read_unlock_bh(&ip_set_ref_lock);
775 for (i = 0; i < ip_set_max; i++) {
776 if (ip_set_list[i] != NULL)
777 ip_set_destroy_set(i);
780 i = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
781 if (i == IPSET_INVALID_ID) {
784 } else if (ip_set_list[i]->ref) {
785 ret = -IPSET_ERR_BUSY;
788 read_unlock_bh(&ip_set_ref_lock);
790 ip_set_destroy_set(i);
794 read_unlock_bh(&ip_set_ref_lock);
801 ip_set_flush_set(struct ip_set *set)
803 pr_debug("set: %s\n", set->name);
805 write_lock_bh(&set->lock);
806 set->variant->flush(set);
807 write_unlock_bh(&set->lock);
811 ip_set_flush(struct sock *ctnl, struct sk_buff *skb,
812 const struct nlmsghdr *nlh,
813 const struct nlattr * const attr[])
817 if (unlikely(protocol_failed(attr)))
820 if (!attr[IPSET_ATTR_SETNAME]) {
821 for (i = 0; i < ip_set_max; i++)
822 if (ip_set_list[i] != NULL)
823 ip_set_flush_set(ip_set_list[i]);
825 i = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
826 if (i == IPSET_INVALID_ID)
829 ip_set_flush_set(ip_set_list[i]);
837 static const struct nla_policy
838 ip_set_setname2_policy[IPSET_ATTR_CMD_MAX + 1] = {
839 [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
840 [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
841 .len = IPSET_MAXNAMELEN - 1 },
842 [IPSET_ATTR_SETNAME2] = { .type = NLA_NUL_STRING,
843 .len = IPSET_MAXNAMELEN - 1 },
847 ip_set_rename(struct sock *ctnl, struct sk_buff *skb,
848 const struct nlmsghdr *nlh,
849 const struct nlattr * const attr[])
856 if (unlikely(protocol_failed(attr) ||
857 attr[IPSET_ATTR_SETNAME] == NULL ||
858 attr[IPSET_ATTR_SETNAME2] == NULL))
859 return -IPSET_ERR_PROTOCOL;
861 set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
865 read_lock_bh(&ip_set_ref_lock);
867 ret = -IPSET_ERR_REFERENCED;
871 name2 = nla_data(attr[IPSET_ATTR_SETNAME2]);
872 for (i = 0; i < ip_set_max; i++) {
873 if (ip_set_list[i] != NULL &&
874 STREQ(ip_set_list[i]->name, name2)) {
875 ret = -IPSET_ERR_EXIST_SETNAME2;
879 strncpy(set->name, name2, IPSET_MAXNAMELEN);
882 read_unlock_bh(&ip_set_ref_lock);
886 /* Swap two sets so that name/index points to the other.
887 * References and set names are also swapped.
889 * The commands are serialized by the nfnl mutex and references are
890 * protected by the ip_set_ref_lock. The kernel interfaces
891 * do not hold the mutex but the pointer settings are atomic
892 * so the ip_set_list always contains valid pointers to the sets.
896 ip_set_swap(struct sock *ctnl, struct sk_buff *skb,
897 const struct nlmsghdr *nlh,
898 const struct nlattr * const attr[])
900 struct ip_set *from, *to;
901 ip_set_id_t from_id, to_id;
902 char from_name[IPSET_MAXNAMELEN];
904 if (unlikely(protocol_failed(attr) ||
905 attr[IPSET_ATTR_SETNAME] == NULL ||
906 attr[IPSET_ATTR_SETNAME2] == NULL))
907 return -IPSET_ERR_PROTOCOL;
909 from_id = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
910 if (from_id == IPSET_INVALID_ID)
913 to_id = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME2]));
914 if (to_id == IPSET_INVALID_ID)
915 return -IPSET_ERR_EXIST_SETNAME2;
917 from = ip_set_list[from_id];
918 to = ip_set_list[to_id];
920 /* Features must not change.
921 * Not an artificial restriction anymore, as we must prevent
922 * possible loops created by swapping in setlist type of sets. */
923 if (!(from->type->features == to->type->features &&
924 from->type->family == to->type->family))
925 return -IPSET_ERR_TYPE_MISMATCH;
927 strncpy(from_name, from->name, IPSET_MAXNAMELEN);
928 strncpy(from->name, to->name, IPSET_MAXNAMELEN);
929 strncpy(to->name, from_name, IPSET_MAXNAMELEN);
931 write_lock_bh(&ip_set_ref_lock);
932 swap(from->ref, to->ref);
933 ip_set_list[from_id] = to;
934 ip_set_list[to_id] = from;
935 write_unlock_bh(&ip_set_ref_lock);
940 /* List/save set data */
948 ip_set_dump_done(struct netlink_callback *cb)
951 pr_debug("release set %s\n", ip_set_list[cb->args[1]]->name);
952 ip_set_put_byindex((ip_set_id_t) cb->args[1]);
958 dump_attrs(struct nlmsghdr *nlh)
960 const struct nlattr *attr;
963 pr_debug("dump nlmsg\n");
964 nlmsg_for_each_attr(attr, nlh, sizeof(struct nfgenmsg), rem) {
965 pr_debug("type: %u, len %u\n", nla_type(attr), attr->nla_len);
970 dump_init(struct netlink_callback *cb)
972 struct nlmsghdr *nlh = nlmsg_hdr(cb->skb);
973 int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
974 struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
975 struct nlattr *attr = (void *)nlh + min_len;
978 /* Second pass, so parser can't fail */
979 nla_parse(cda, IPSET_ATTR_CMD_MAX,
980 attr, nlh->nlmsg_len - min_len, ip_set_setname_policy);
982 /* cb->args[0] : dump single set/all sets
984 * [..]: type specific
987 if (!cda[IPSET_ATTR_SETNAME]) {
988 cb->args[0] = DUMP_ALL;
992 index = find_set_id(nla_data(cda[IPSET_ATTR_SETNAME]));
993 if (index == IPSET_INVALID_ID)
996 cb->args[0] = DUMP_ONE;
1002 ip_set_dump_start(struct sk_buff *skb, struct netlink_callback *cb)
1004 ip_set_id_t index = IPSET_INVALID_ID, max;
1005 struct ip_set *set = NULL;
1006 struct nlmsghdr *nlh = NULL;
1007 unsigned int flags = NETLINK_CB(cb->skb).pid ? NLM_F_MULTI : 0;
1010 if (cb->args[0] == DUMP_INIT) {
1011 ret = dump_init(cb);
1013 nlh = nlmsg_hdr(cb->skb);
1014 /* We have to create and send the error message
1016 if (nlh->nlmsg_flags & NLM_F_ACK)
1017 netlink_ack(cb->skb, nlh, ret);
1022 if (cb->args[1] >= ip_set_max)
1025 pr_debug("args[0]: %ld args[1]: %ld\n", cb->args[0], cb->args[1]);
1026 max = cb->args[0] == DUMP_ONE ? cb->args[1] + 1 : ip_set_max;
1027 for (; cb->args[1] < max; cb->args[1]++) {
1028 index = (ip_set_id_t) cb->args[1];
1029 set = ip_set_list[index];
1031 if (cb->args[0] == DUMP_ONE) {
1037 /* When dumping all sets, we must dump "sorted"
1038 * so that lists (unions of sets) are dumped last.
1040 if (cb->args[0] != DUMP_ONE &&
1041 !((cb->args[0] == DUMP_ALL) ^
1042 (set->type->features & IPSET_DUMP_LAST)))
1044 pr_debug("List set: %s\n", set->name);
1046 /* Start listing: make sure set won't be destroyed */
1047 pr_debug("reference set\n");
1048 __ip_set_get(index);
1050 nlh = start_msg(skb, NETLINK_CB(cb->skb).pid,
1051 cb->nlh->nlmsg_seq, flags,
1055 goto release_refcount;
1057 NLA_PUT_U8(skb, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
1058 NLA_PUT_STRING(skb, IPSET_ATTR_SETNAME, set->name);
1059 switch (cb->args[2]) {
1061 /* Core header data */
1062 NLA_PUT_STRING(skb, IPSET_ATTR_TYPENAME,
1064 NLA_PUT_U8(skb, IPSET_ATTR_FAMILY,
1066 NLA_PUT_U8(skb, IPSET_ATTR_REVISION,
1067 set->type->revision);
1068 ret = set->variant->head(set, skb);
1070 goto release_refcount;
1071 /* Fall through and add elements */
1073 read_lock_bh(&set->lock);
1074 ret = set->variant->list(set, skb, cb);
1075 read_unlock_bh(&set->lock);
1077 /* Set is done, proceed with next one */
1078 if (cb->args[0] == DUMP_ONE)
1079 cb->args[1] = IPSET_INVALID_ID;
1083 goto release_refcount;
1091 /* If there was an error or set is done, release set */
1092 if (ret || !cb->args[2]) {
1093 pr_debug("release set %s\n", ip_set_list[index]->name);
1094 ip_set_put_byindex(index);
1097 /* If we dump all sets, continue with dumping last ones */
1098 if (cb->args[0] == DUMP_ALL && cb->args[1] >= max && !cb->args[2])
1099 cb->args[0] = DUMP_LAST;
1103 nlmsg_end(skb, nlh);
1104 pr_debug("nlmsg_len: %u\n", nlh->nlmsg_len);
1108 return ret < 0 ? ret : skb->len;
1112 ip_set_dump(struct sock *ctnl, struct sk_buff *skb,
1113 const struct nlmsghdr *nlh,
1114 const struct nlattr * const attr[])
1116 if (unlikely(protocol_failed(attr)))
1117 return -IPSET_ERR_PROTOCOL;
1119 return netlink_dump_start(ctnl, skb, nlh,
1124 /* Add, del and test */
1126 static const struct nla_policy ip_set_adt_policy[IPSET_ATTR_CMD_MAX + 1] = {
1127 [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
1128 [IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
1129 .len = IPSET_MAXNAMELEN - 1 },
1130 [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
1131 [IPSET_ATTR_DATA] = { .type = NLA_NESTED },
1132 [IPSET_ATTR_ADT] = { .type = NLA_NESTED },
1136 call_ad(struct sock *ctnl, struct sk_buff *skb, struct ip_set *set,
1137 struct nlattr *tb[], enum ipset_adt adt,
1138 u32 flags, bool use_lineno)
1140 int ret, retried = 0;
1142 bool eexist = flags & IPSET_FLAG_EXIST;
1145 write_lock_bh(&set->lock);
1146 ret = set->variant->uadt(set, tb, adt, &lineno, flags);
1147 write_unlock_bh(&set->lock);
1148 } while (ret == -EAGAIN &&
1149 set->variant->resize &&
1150 (ret = set->variant->resize(set, retried++)) == 0);
1152 if (!ret || (ret == -IPSET_ERR_EXIST && eexist))
1154 if (lineno && use_lineno) {
1155 /* Error in restore/batch mode: send back lineno */
1156 struct nlmsghdr *rep, *nlh = nlmsg_hdr(skb);
1157 struct sk_buff *skb2;
1158 struct nlmsgerr *errmsg;
1159 size_t payload = sizeof(*errmsg) + nlmsg_len(nlh);
1160 int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
1161 struct nlattr *cda[IPSET_ATTR_CMD_MAX+1];
1162 struct nlattr *cmdattr;
1165 skb2 = nlmsg_new(payload, GFP_KERNEL);
1168 rep = __nlmsg_put(skb2, NETLINK_CB(skb).pid,
1169 nlh->nlmsg_seq, NLMSG_ERROR, payload, 0);
1170 errmsg = nlmsg_data(rep);
1171 errmsg->error = ret;
1172 memcpy(&errmsg->msg, nlh, nlh->nlmsg_len);
1173 cmdattr = (void *)&errmsg->msg + min_len;
1175 nla_parse(cda, IPSET_ATTR_CMD_MAX,
1176 cmdattr, nlh->nlmsg_len - min_len,
1179 errline = nla_data(cda[IPSET_ATTR_LINENO]);
1183 netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1184 /* Signal netlink not to send its ACK/errmsg. */
1192 ip_set_uadd(struct sock *ctnl, struct sk_buff *skb,
1193 const struct nlmsghdr *nlh,
1194 const struct nlattr * const attr[])
1197 struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
1198 const struct nlattr *nla;
1199 u32 flags = flag_exist(nlh);
1203 if (unlikely(protocol_failed(attr) ||
1204 attr[IPSET_ATTR_SETNAME] == NULL ||
1205 !((attr[IPSET_ATTR_DATA] != NULL) ^
1206 (attr[IPSET_ATTR_ADT] != NULL)) ||
1207 (attr[IPSET_ATTR_DATA] != NULL &&
1208 !flag_nested(attr[IPSET_ATTR_DATA])) ||
1209 (attr[IPSET_ATTR_ADT] != NULL &&
1210 (!flag_nested(attr[IPSET_ATTR_ADT]) ||
1211 attr[IPSET_ATTR_LINENO] == NULL))))
1212 return -IPSET_ERR_PROTOCOL;
1214 set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
1218 use_lineno = !!attr[IPSET_ATTR_LINENO];
1219 if (attr[IPSET_ATTR_DATA]) {
1220 if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX,
1221 attr[IPSET_ATTR_DATA],
1222 set->type->adt_policy))
1223 return -IPSET_ERR_PROTOCOL;
1224 ret = call_ad(ctnl, skb, set, tb, IPSET_ADD, flags,
1229 nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
1230 memset(tb, 0, sizeof(tb));
1231 if (nla_type(nla) != IPSET_ATTR_DATA ||
1232 !flag_nested(nla) ||
1233 nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla,
1234 set->type->adt_policy))
1235 return -IPSET_ERR_PROTOCOL;
1236 ret = call_ad(ctnl, skb, set, tb, IPSET_ADD,
1246 ip_set_udel(struct sock *ctnl, struct sk_buff *skb,
1247 const struct nlmsghdr *nlh,
1248 const struct nlattr * const attr[])
1251 struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
1252 const struct nlattr *nla;
1253 u32 flags = flag_exist(nlh);
1257 if (unlikely(protocol_failed(attr) ||
1258 attr[IPSET_ATTR_SETNAME] == NULL ||
1259 !((attr[IPSET_ATTR_DATA] != NULL) ^
1260 (attr[IPSET_ATTR_ADT] != NULL)) ||
1261 (attr[IPSET_ATTR_DATA] != NULL &&
1262 !flag_nested(attr[IPSET_ATTR_DATA])) ||
1263 (attr[IPSET_ATTR_ADT] != NULL &&
1264 (!flag_nested(attr[IPSET_ATTR_ADT]) ||
1265 attr[IPSET_ATTR_LINENO] == NULL))))
1266 return -IPSET_ERR_PROTOCOL;
1268 set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
1272 use_lineno = !!attr[IPSET_ATTR_LINENO];
1273 if (attr[IPSET_ATTR_DATA]) {
1274 if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX,
1275 attr[IPSET_ATTR_DATA],
1276 set->type->adt_policy))
1277 return -IPSET_ERR_PROTOCOL;
1278 ret = call_ad(ctnl, skb, set, tb, IPSET_DEL, flags,
1283 nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
1284 memset(tb, 0, sizeof(*tb));
1285 if (nla_type(nla) != IPSET_ATTR_DATA ||
1286 !flag_nested(nla) ||
1287 nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla,
1288 set->type->adt_policy))
1289 return -IPSET_ERR_PROTOCOL;
1290 ret = call_ad(ctnl, skb, set, tb, IPSET_DEL,
1300 ip_set_utest(struct sock *ctnl, struct sk_buff *skb,
1301 const struct nlmsghdr *nlh,
1302 const struct nlattr * const attr[])
1305 struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {};
1308 if (unlikely(protocol_failed(attr) ||
1309 attr[IPSET_ATTR_SETNAME] == NULL ||
1310 attr[IPSET_ATTR_DATA] == NULL ||
1311 !flag_nested(attr[IPSET_ATTR_DATA])))
1312 return -IPSET_ERR_PROTOCOL;
1314 set = find_set(nla_data(attr[IPSET_ATTR_SETNAME]));
1318 if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA],
1319 set->type->adt_policy))
1320 return -IPSET_ERR_PROTOCOL;
1322 read_lock_bh(&set->lock);
1323 ret = set->variant->uadt(set, tb, IPSET_TEST, NULL, 0);
1324 read_unlock_bh(&set->lock);
1325 /* Userspace can't trigger element to be re-added */
1329 return ret < 0 ? ret : ret > 0 ? 0 : -IPSET_ERR_EXIST;
1332 /* Get headed data of a set */
1335 ip_set_header(struct sock *ctnl, struct sk_buff *skb,
1336 const struct nlmsghdr *nlh,
1337 const struct nlattr * const attr[])
1339 const struct ip_set *set;
1340 struct sk_buff *skb2;
1341 struct nlmsghdr *nlh2;
1345 if (unlikely(protocol_failed(attr) ||
1346 attr[IPSET_ATTR_SETNAME] == NULL))
1347 return -IPSET_ERR_PROTOCOL;
1349 index = find_set_id(nla_data(attr[IPSET_ATTR_SETNAME]));
1350 if (index == IPSET_INVALID_ID)
1352 set = ip_set_list[index];
1354 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1358 nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
1362 NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
1363 NLA_PUT_STRING(skb2, IPSET_ATTR_SETNAME, set->name);
1364 NLA_PUT_STRING(skb2, IPSET_ATTR_TYPENAME, set->type->name);
1365 NLA_PUT_U8(skb2, IPSET_ATTR_FAMILY, set->family);
1366 NLA_PUT_U8(skb2, IPSET_ATTR_REVISION, set->type->revision);
1367 nlmsg_end(skb2, nlh2);
1369 ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1376 nlmsg_cancel(skb2, nlh2);
1384 static const struct nla_policy ip_set_type_policy[IPSET_ATTR_CMD_MAX + 1] = {
1385 [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
1386 [IPSET_ATTR_TYPENAME] = { .type = NLA_NUL_STRING,
1387 .len = IPSET_MAXNAMELEN - 1 },
1388 [IPSET_ATTR_FAMILY] = { .type = NLA_U8 },
1392 ip_set_type(struct sock *ctnl, struct sk_buff *skb,
1393 const struct nlmsghdr *nlh,
1394 const struct nlattr * const attr[])
1396 struct sk_buff *skb2;
1397 struct nlmsghdr *nlh2;
1398 u8 family, min, max;
1399 const char *typename;
1402 if (unlikely(protocol_failed(attr) ||
1403 attr[IPSET_ATTR_TYPENAME] == NULL ||
1404 attr[IPSET_ATTR_FAMILY] == NULL))
1405 return -IPSET_ERR_PROTOCOL;
1407 family = nla_get_u8(attr[IPSET_ATTR_FAMILY]);
1408 typename = nla_data(attr[IPSET_ATTR_TYPENAME]);
1409 ret = find_set_type_minmax(typename, family, &min, &max);
1413 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1417 nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
1421 NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
1422 NLA_PUT_STRING(skb2, IPSET_ATTR_TYPENAME, typename);
1423 NLA_PUT_U8(skb2, IPSET_ATTR_FAMILY, family);
1424 NLA_PUT_U8(skb2, IPSET_ATTR_REVISION, max);
1425 NLA_PUT_U8(skb2, IPSET_ATTR_REVISION_MIN, min);
1426 nlmsg_end(skb2, nlh2);
1428 pr_debug("Send TYPE, nlmsg_len: %u\n", nlh2->nlmsg_len);
1429 ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1436 nlmsg_cancel(skb2, nlh2);
1442 /* Get protocol version */
1444 static const struct nla_policy
1445 ip_set_protocol_policy[IPSET_ATTR_CMD_MAX + 1] = {
1446 [IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
1450 ip_set_protocol(struct sock *ctnl, struct sk_buff *skb,
1451 const struct nlmsghdr *nlh,
1452 const struct nlattr * const attr[])
1454 struct sk_buff *skb2;
1455 struct nlmsghdr *nlh2;
1458 if (unlikely(attr[IPSET_ATTR_PROTOCOL] == NULL))
1459 return -IPSET_ERR_PROTOCOL;
1461 skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1465 nlh2 = start_msg(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0,
1466 IPSET_CMD_PROTOCOL);
1469 NLA_PUT_U8(skb2, IPSET_ATTR_PROTOCOL, IPSET_PROTOCOL);
1470 nlmsg_end(skb2, nlh2);
1472 ret = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
1479 nlmsg_cancel(skb2, nlh2);
1485 static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = {
1486 [IPSET_CMD_CREATE] = {
1487 .call = ip_set_create,
1488 .attr_count = IPSET_ATTR_CMD_MAX,
1489 .policy = ip_set_create_policy,
1491 [IPSET_CMD_DESTROY] = {
1492 .call = ip_set_destroy,
1493 .attr_count = IPSET_ATTR_CMD_MAX,
1494 .policy = ip_set_setname_policy,
1496 [IPSET_CMD_FLUSH] = {
1497 .call = ip_set_flush,
1498 .attr_count = IPSET_ATTR_CMD_MAX,
1499 .policy = ip_set_setname_policy,
1501 [IPSET_CMD_RENAME] = {
1502 .call = ip_set_rename,
1503 .attr_count = IPSET_ATTR_CMD_MAX,
1504 .policy = ip_set_setname2_policy,
1506 [IPSET_CMD_SWAP] = {
1507 .call = ip_set_swap,
1508 .attr_count = IPSET_ATTR_CMD_MAX,
1509 .policy = ip_set_setname2_policy,
1511 [IPSET_CMD_LIST] = {
1512 .call = ip_set_dump,
1513 .attr_count = IPSET_ATTR_CMD_MAX,
1514 .policy = ip_set_setname_policy,
1516 [IPSET_CMD_SAVE] = {
1517 .call = ip_set_dump,
1518 .attr_count = IPSET_ATTR_CMD_MAX,
1519 .policy = ip_set_setname_policy,
1522 .call = ip_set_uadd,
1523 .attr_count = IPSET_ATTR_CMD_MAX,
1524 .policy = ip_set_adt_policy,
1527 .call = ip_set_udel,
1528 .attr_count = IPSET_ATTR_CMD_MAX,
1529 .policy = ip_set_adt_policy,
1531 [IPSET_CMD_TEST] = {
1532 .call = ip_set_utest,
1533 .attr_count = IPSET_ATTR_CMD_MAX,
1534 .policy = ip_set_adt_policy,
1536 [IPSET_CMD_HEADER] = {
1537 .call = ip_set_header,
1538 .attr_count = IPSET_ATTR_CMD_MAX,
1539 .policy = ip_set_setname_policy,
1541 [IPSET_CMD_TYPE] = {
1542 .call = ip_set_type,
1543 .attr_count = IPSET_ATTR_CMD_MAX,
1544 .policy = ip_set_type_policy,
1546 [IPSET_CMD_PROTOCOL] = {
1547 .call = ip_set_protocol,
1548 .attr_count = IPSET_ATTR_CMD_MAX,
1549 .policy = ip_set_protocol_policy,
1553 static struct nfnetlink_subsystem ip_set_netlink_subsys __read_mostly = {
1555 .subsys_id = NFNL_SUBSYS_IPSET,
1556 .cb_count = IPSET_MSG_MAX,
1557 .cb = ip_set_netlink_subsys_cb,
1560 /* Interface to iptables/ip6tables */
1563 ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len)
1567 int copylen = *len, ret = 0;
1569 if (!capable(CAP_NET_ADMIN))
1571 if (optval != SO_IP_SET)
1573 if (*len < sizeof(unsigned))
1576 data = vmalloc(*len);
1579 if (copy_from_user(data, user, *len) != 0) {
1583 op = (unsigned *) data;
1585 if (*op < IP_SET_OP_VERSION) {
1586 /* Check the version at the beginning of operations */
1587 struct ip_set_req_version *req_version = data;
1588 if (req_version->version != IPSET_PROTOCOL) {
1595 case IP_SET_OP_VERSION: {
1596 struct ip_set_req_version *req_version = data;
1598 if (*len != sizeof(struct ip_set_req_version)) {
1603 req_version->version = IPSET_PROTOCOL;
1604 ret = copy_to_user(user, req_version,
1605 sizeof(struct ip_set_req_version));
1608 case IP_SET_OP_GET_BYNAME: {
1609 struct ip_set_req_get_set *req_get = data;
1611 if (*len != sizeof(struct ip_set_req_get_set)) {
1615 req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0';
1617 req_get->set.index = find_set_id(req_get->set.name);
1621 case IP_SET_OP_GET_BYINDEX: {
1622 struct ip_set_req_get_set *req_get = data;
1624 if (*len != sizeof(struct ip_set_req_get_set) ||
1625 req_get->set.index >= ip_set_max) {
1630 strncpy(req_get->set.name,
1631 ip_set_list[req_get->set.index]
1632 ? ip_set_list[req_get->set.index]->name : "",
1640 } /* end of switch(op) */
1643 ret = copy_to_user(user, data, copylen);
1652 static struct nf_sockopt_ops so_set __read_mostly = {
1654 .get_optmin = SO_IP_SET,
1655 .get_optmax = SO_IP_SET + 1,
1656 .get = &ip_set_sockfn_get,
1657 .owner = THIS_MODULE,
1666 ip_set_max = max_sets;
1667 if (ip_set_max >= IPSET_INVALID_ID)
1668 ip_set_max = IPSET_INVALID_ID - 1;
1670 ip_set_list = kzalloc(sizeof(struct ip_set *) * ip_set_max,
1673 pr_err("ip_set: Unable to create ip_set_list\n");
1677 ret = nfnetlink_subsys_register(&ip_set_netlink_subsys);
1679 pr_err("ip_set: cannot register with nfnetlink.\n");
1683 ret = nf_register_sockopt(&so_set);
1685 pr_err("SO_SET registry failed: %d\n", ret);
1686 nfnetlink_subsys_unregister(&ip_set_netlink_subsys);
1691 pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL);
1698 /* There can't be any existing set */
1699 nf_unregister_sockopt(&so_set);
1700 nfnetlink_subsys_unregister(&ip_set_netlink_subsys);
1702 pr_debug("these are the famous last words\n");
1705 module_init(ip_set_init);
1706 module_exit(ip_set_fini);