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 <net/netlink.h>
22 #include <linux/netfilter.h>
23 #include <linux/netfilter/x_tables.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
== NFPROTO_UNSPEC
) &&
73 revision
>= type
->revision_min
&&
74 revision
<= type
->revision_max
)
79 /* Unlock, try to load a set type module and lock again */
81 load_settype(const char *name
)
84 pr_debug("try to load ip_set_%s\n", name
);
85 if (request_module("ip_set_%s", name
) < 0) {
86 pr_warning("Can't find ip_set type %s\n", name
);
94 /* Find a set type and reference it */
95 #define find_set_type_get(name, family, revision, found) \
96 __find_set_type_get(name, family, revision, found, false)
99 __find_set_type_get(const char *name
, u8 family
, u8 revision
,
100 struct ip_set_type
**found
, bool retry
)
102 struct ip_set_type
*type
;
105 if (retry
&& !load_settype(name
))
106 return -IPSET_ERR_FIND_TYPE
;
109 *found
= find_set_type(name
, family
, revision
);
111 err
= !try_module_get((*found
)->me
) ? -EFAULT
: 0;
114 /* Make sure the type is already loaded
115 * but we don't support the revision */
116 list_for_each_entry_rcu(type
, &ip_set_type_list
, list
)
117 if (STREQ(type
->name
, name
)) {
118 err
= -IPSET_ERR_FIND_TYPE
;
123 return retry
? -IPSET_ERR_FIND_TYPE
:
124 __find_set_type_get(name
, family
, revision
, found
, true);
131 /* Find a given set type by name and family.
132 * If we succeeded, the supported minimal and maximum revisions are
135 #define find_set_type_minmax(name, family, min, max) \
136 __find_set_type_minmax(name, family, min, max, false)
139 __find_set_type_minmax(const char *name
, u8 family
, u8
*min
, u8
*max
,
142 struct ip_set_type
*type
;
145 if (retry
&& !load_settype(name
))
146 return -IPSET_ERR_FIND_TYPE
;
148 *min
= 255; *max
= 0;
150 list_for_each_entry_rcu(type
, &ip_set_type_list
, list
)
151 if (STREQ(type
->name
, name
) &&
152 (type
->family
== family
|| type
->family
== NFPROTO_UNSPEC
)) {
154 if (type
->revision_min
< *min
)
155 *min
= type
->revision_min
;
156 if (type
->revision_max
> *max
)
157 *max
= type
->revision_max
;
163 return retry
? -IPSET_ERR_FIND_TYPE
:
164 __find_set_type_minmax(name
, family
, min
, max
, true);
167 #define family_name(f) ((f) == NFPROTO_IPV4 ? "inet" : \
168 (f) == NFPROTO_IPV6 ? "inet6" : "any")
170 /* Register a set type structure. The type is identified by
171 * the unique triple of name, family and revision.
174 ip_set_type_register(struct ip_set_type
*type
)
178 if (type
->protocol
!= IPSET_PROTOCOL
) {
179 pr_warning("ip_set type %s, family %s, revision %u:%u uses "
180 "wrong protocol version %u (want %u)\n",
181 type
->name
, family_name(type
->family
),
182 type
->revision_min
, type
->revision_max
,
183 type
->protocol
, IPSET_PROTOCOL
);
188 if (find_set_type(type
->name
, type
->family
, type
->revision_min
)) {
190 pr_warning("ip_set type %s, family %s with revision min %u "
191 "already registered!\n", type
->name
,
192 family_name(type
->family
), type
->revision_min
);
196 list_add_rcu(&type
->list
, &ip_set_type_list
);
197 pr_debug("type %s, family %s, revision %u:%u registered.\n",
198 type
->name
, family_name(type
->family
),
199 type
->revision_min
, type
->revision_max
);
201 ip_set_type_unlock();
204 EXPORT_SYMBOL_GPL(ip_set_type_register
);
206 /* Unregister a set type. There's a small race with ip_set_create */
208 ip_set_type_unregister(struct ip_set_type
*type
)
211 if (!find_set_type(type
->name
, type
->family
, type
->revision_min
)) {
212 pr_warning("ip_set type %s, family %s with revision min %u "
213 "not registered\n", type
->name
,
214 family_name(type
->family
), type
->revision_min
);
217 list_del_rcu(&type
->list
);
218 pr_debug("type %s, family %s with revision min %u unregistered.\n",
219 type
->name
, family_name(type
->family
), type
->revision_min
);
221 ip_set_type_unlock();
225 EXPORT_SYMBOL_GPL(ip_set_type_unregister
);
227 /* Utility functions */
229 ip_set_alloc(size_t size
)
231 void *members
= NULL
;
233 if (size
< KMALLOC_MAX_SIZE
)
234 members
= kzalloc(size
, GFP_KERNEL
| __GFP_NOWARN
);
237 pr_debug("%p: allocated with kmalloc\n", members
);
241 members
= vzalloc(size
);
244 pr_debug("%p: allocated with vmalloc\n", members
);
248 EXPORT_SYMBOL_GPL(ip_set_alloc
);
251 ip_set_free(void *members
)
253 pr_debug("%p: free with %s\n", members
,
254 is_vmalloc_addr(members
) ? "vfree" : "kfree");
255 if (is_vmalloc_addr(members
))
260 EXPORT_SYMBOL_GPL(ip_set_free
);
263 flag_nested(const struct nlattr
*nla
)
265 return nla
->nla_type
& NLA_F_NESTED
;
268 static const struct nla_policy ipaddr_policy
[IPSET_ATTR_IPADDR_MAX
+ 1] = {
269 [IPSET_ATTR_IPADDR_IPV4
] = { .type
= NLA_U32
},
270 [IPSET_ATTR_IPADDR_IPV6
] = { .type
= NLA_BINARY
,
271 .len
= sizeof(struct in6_addr
) },
275 ip_set_get_ipaddr4(struct nlattr
*nla
, __be32
*ipaddr
)
277 struct nlattr
*tb
[IPSET_ATTR_IPADDR_MAX
+1];
279 if (unlikely(!flag_nested(nla
)))
280 return -IPSET_ERR_PROTOCOL
;
281 if (nla_parse_nested(tb
, IPSET_ATTR_IPADDR_MAX
, nla
, ipaddr_policy
))
282 return -IPSET_ERR_PROTOCOL
;
283 if (unlikely(!ip_set_attr_netorder(tb
, IPSET_ATTR_IPADDR_IPV4
)))
284 return -IPSET_ERR_PROTOCOL
;
286 *ipaddr
= nla_get_be32(tb
[IPSET_ATTR_IPADDR_IPV4
]);
289 EXPORT_SYMBOL_GPL(ip_set_get_ipaddr4
);
292 ip_set_get_ipaddr6(struct nlattr
*nla
, union nf_inet_addr
*ipaddr
)
294 struct nlattr
*tb
[IPSET_ATTR_IPADDR_MAX
+1];
296 if (unlikely(!flag_nested(nla
)))
297 return -IPSET_ERR_PROTOCOL
;
299 if (nla_parse_nested(tb
, IPSET_ATTR_IPADDR_MAX
, nla
, ipaddr_policy
))
300 return -IPSET_ERR_PROTOCOL
;
301 if (unlikely(!ip_set_attr_netorder(tb
, IPSET_ATTR_IPADDR_IPV6
)))
302 return -IPSET_ERR_PROTOCOL
;
304 memcpy(ipaddr
, nla_data(tb
[IPSET_ATTR_IPADDR_IPV6
]),
305 sizeof(struct in6_addr
));
308 EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6
);
311 * Creating/destroying/renaming/swapping affect the existence and
312 * the properties of a set. All of these can be executed from userspace
313 * only and serialized by the nfnl mutex indirectly from nfnetlink.
315 * Sets are identified by their index in ip_set_list and the index
316 * is used by the external references (set/SET netfilter modules).
318 * The set behind an index may change by swapping only, from userspace.
322 __ip_set_get(ip_set_id_t index
)
324 write_lock_bh(&ip_set_ref_lock
);
325 ip_set_list
[index
]->ref
++;
326 write_unlock_bh(&ip_set_ref_lock
);
330 __ip_set_put(ip_set_id_t index
)
332 write_lock_bh(&ip_set_ref_lock
);
333 BUG_ON(ip_set_list
[index
]->ref
== 0);
334 ip_set_list
[index
]->ref
--;
335 write_unlock_bh(&ip_set_ref_lock
);
339 * Add, del and test set entries from kernel.
341 * The set behind the index must exist and must be referenced
342 * so it can't be destroyed (or changed) under our foot.
346 ip_set_test(ip_set_id_t index
, const struct sk_buff
*skb
,
347 const struct xt_action_param
*par
,
348 const struct ip_set_adt_opt
*opt
)
350 struct ip_set
*set
= ip_set_list
[index
];
354 pr_debug("set %s, index %u\n", set
->name
, index
);
356 if (opt
->dim
< set
->type
->dimension
||
357 !(opt
->family
== set
->family
|| set
->family
== NFPROTO_UNSPEC
))
360 read_lock_bh(&set
->lock
);
361 ret
= set
->variant
->kadt(set
, skb
, par
, IPSET_TEST
, opt
);
362 read_unlock_bh(&set
->lock
);
364 if (ret
== -EAGAIN
) {
365 /* Type requests element to be completed */
366 pr_debug("element must be competed, ADD is triggered\n");
367 write_lock_bh(&set
->lock
);
368 set
->variant
->kadt(set
, skb
, par
, IPSET_ADD
, opt
);
369 write_unlock_bh(&set
->lock
);
373 /* Convert error codes to nomatch */
374 return (ret
< 0 ? 0 : ret
);
376 EXPORT_SYMBOL_GPL(ip_set_test
);
379 ip_set_add(ip_set_id_t index
, const struct sk_buff
*skb
,
380 const struct xt_action_param
*par
,
381 const struct ip_set_adt_opt
*opt
)
383 struct ip_set
*set
= ip_set_list
[index
];
387 pr_debug("set %s, index %u\n", set
->name
, index
);
389 if (opt
->dim
< set
->type
->dimension
||
390 !(opt
->family
== set
->family
|| set
->family
== NFPROTO_UNSPEC
))
393 write_lock_bh(&set
->lock
);
394 ret
= set
->variant
->kadt(set
, skb
, par
, IPSET_ADD
, opt
);
395 write_unlock_bh(&set
->lock
);
399 EXPORT_SYMBOL_GPL(ip_set_add
);
402 ip_set_del(ip_set_id_t index
, const struct sk_buff
*skb
,
403 const struct xt_action_param
*par
,
404 const struct ip_set_adt_opt
*opt
)
406 struct ip_set
*set
= ip_set_list
[index
];
410 pr_debug("set %s, index %u\n", set
->name
, index
);
412 if (opt
->dim
< set
->type
->dimension
||
413 !(opt
->family
== set
->family
|| set
->family
== NFPROTO_UNSPEC
))
416 write_lock_bh(&set
->lock
);
417 ret
= set
->variant
->kadt(set
, skb
, par
, IPSET_DEL
, opt
);
418 write_unlock_bh(&set
->lock
);
422 EXPORT_SYMBOL_GPL(ip_set_del
);
425 * Find set by name, reference it once. The reference makes sure the
426 * thing pointed to, does not go away under our feet.
430 ip_set_get_byname(const char *name
, struct ip_set
**set
)
432 ip_set_id_t i
, index
= IPSET_INVALID_ID
;
435 for (i
= 0; i
< ip_set_max
; i
++) {
437 if (s
!= NULL
&& STREQ(s
->name
, name
)) {
446 EXPORT_SYMBOL_GPL(ip_set_get_byname
);
449 * If the given set pointer points to a valid set, decrement
450 * reference count by 1. The caller shall not assume the index
451 * to be valid, after calling this function.
455 ip_set_put_byindex(ip_set_id_t index
)
457 if (ip_set_list
[index
] != NULL
)
460 EXPORT_SYMBOL_GPL(ip_set_put_byindex
);
463 * Get the name of a set behind a set index.
464 * We assume the set is referenced, so it does exist and
465 * can't be destroyed. The set cannot be renamed due to
466 * the referencing either.
470 ip_set_name_byindex(ip_set_id_t index
)
472 const struct ip_set
*set
= ip_set_list
[index
];
475 BUG_ON(set
->ref
== 0);
477 /* Referenced, so it's safe */
480 EXPORT_SYMBOL_GPL(ip_set_name_byindex
);
483 * Routines to call by external subsystems, which do not
484 * call nfnl_lock for us.
488 * Find set by name, reference it once. The reference makes sure the
489 * thing pointed to, does not go away under our feet.
491 * The nfnl mutex is used in the function.
494 ip_set_nfnl_get(const char *name
)
500 index
= ip_set_get_byname(name
, &s
);
505 EXPORT_SYMBOL_GPL(ip_set_nfnl_get
);
508 * Find set by index, reference it once. The reference makes sure the
509 * thing pointed to, does not go away under our feet.
511 * The nfnl mutex is used in the function.
514 ip_set_nfnl_get_byindex(ip_set_id_t index
)
516 if (index
> ip_set_max
)
517 return IPSET_INVALID_ID
;
520 if (ip_set_list
[index
])
523 index
= IPSET_INVALID_ID
;
528 EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex
);
531 * If the given set pointer points to a valid set, decrement
532 * reference count by 1. The caller shall not assume the index
533 * to be valid, after calling this function.
535 * The nfnl mutex is used in the function.
538 ip_set_nfnl_put(ip_set_id_t index
)
541 ip_set_put_byindex(index
);
544 EXPORT_SYMBOL_GPL(ip_set_nfnl_put
);
547 * Communication protocol with userspace over netlink.
549 * The commands are serialized by the nfnl mutex.
553 protocol_failed(const struct nlattr
* const tb
[])
555 return !tb
[IPSET_ATTR_PROTOCOL
] ||
556 nla_get_u8(tb
[IPSET_ATTR_PROTOCOL
]) != IPSET_PROTOCOL
;
560 flag_exist(const struct nlmsghdr
*nlh
)
562 return nlh
->nlmsg_flags
& NLM_F_EXCL
? 0 : IPSET_FLAG_EXIST
;
565 static struct nlmsghdr
*
566 start_msg(struct sk_buff
*skb
, u32 portid
, u32 seq
, unsigned int flags
,
569 struct nlmsghdr
*nlh
;
570 struct nfgenmsg
*nfmsg
;
572 nlh
= nlmsg_put(skb
, portid
, seq
, cmd
| (NFNL_SUBSYS_IPSET
<< 8),
573 sizeof(*nfmsg
), flags
);
577 nfmsg
= nlmsg_data(nlh
);
578 nfmsg
->nfgen_family
= NFPROTO_IPV4
;
579 nfmsg
->version
= NFNETLINK_V0
;
587 static const struct nla_policy ip_set_create_policy
[IPSET_ATTR_CMD_MAX
+ 1] = {
588 [IPSET_ATTR_PROTOCOL
] = { .type
= NLA_U8
},
589 [IPSET_ATTR_SETNAME
] = { .type
= NLA_NUL_STRING
,
590 .len
= IPSET_MAXNAMELEN
- 1 },
591 [IPSET_ATTR_TYPENAME
] = { .type
= NLA_NUL_STRING
,
592 .len
= IPSET_MAXNAMELEN
- 1},
593 [IPSET_ATTR_REVISION
] = { .type
= NLA_U8
},
594 [IPSET_ATTR_FAMILY
] = { .type
= NLA_U8
},
595 [IPSET_ATTR_DATA
] = { .type
= NLA_NESTED
},
599 find_set_id(const char *name
)
601 ip_set_id_t i
, index
= IPSET_INVALID_ID
;
602 const struct ip_set
*set
;
604 for (i
= 0; index
== IPSET_INVALID_ID
&& i
< ip_set_max
; i
++) {
605 set
= ip_set_list
[i
];
606 if (set
!= NULL
&& STREQ(set
->name
, name
))
612 static inline struct ip_set
*
613 find_set(const char *name
)
615 ip_set_id_t index
= find_set_id(name
);
617 return index
== IPSET_INVALID_ID
? NULL
: ip_set_list
[index
];
621 find_free_id(const char *name
, ip_set_id_t
*index
, struct ip_set
**set
)
625 *index
= IPSET_INVALID_ID
;
626 for (i
= 0; i
< ip_set_max
; i
++) {
627 if (ip_set_list
[i
] == NULL
) {
628 if (*index
== IPSET_INVALID_ID
)
630 } else if (STREQ(name
, ip_set_list
[i
]->name
)) {
632 *set
= ip_set_list
[i
];
636 if (*index
== IPSET_INVALID_ID
)
637 /* No free slot remained */
638 return -IPSET_ERR_MAX_SETS
;
643 ip_set_none(struct sock
*ctnl
, struct sk_buff
*skb
,
644 const struct nlmsghdr
*nlh
,
645 const struct nlattr
* const attr
[])
651 ip_set_create(struct sock
*ctnl
, struct sk_buff
*skb
,
652 const struct nlmsghdr
*nlh
,
653 const struct nlattr
* const attr
[])
655 struct ip_set
*set
, *clash
= NULL
;
656 ip_set_id_t index
= IPSET_INVALID_ID
;
657 struct nlattr
*tb
[IPSET_ATTR_CREATE_MAX
+1] = {};
658 const char *name
, *typename
;
660 u32 flags
= flag_exist(nlh
);
663 if (unlikely(protocol_failed(attr
) ||
664 attr
[IPSET_ATTR_SETNAME
] == NULL
||
665 attr
[IPSET_ATTR_TYPENAME
] == NULL
||
666 attr
[IPSET_ATTR_REVISION
] == NULL
||
667 attr
[IPSET_ATTR_FAMILY
] == NULL
||
668 (attr
[IPSET_ATTR_DATA
] != NULL
&&
669 !flag_nested(attr
[IPSET_ATTR_DATA
]))))
670 return -IPSET_ERR_PROTOCOL
;
672 name
= nla_data(attr
[IPSET_ATTR_SETNAME
]);
673 typename
= nla_data(attr
[IPSET_ATTR_TYPENAME
]);
674 family
= nla_get_u8(attr
[IPSET_ATTR_FAMILY
]);
675 revision
= nla_get_u8(attr
[IPSET_ATTR_REVISION
]);
676 pr_debug("setname: %s, typename: %s, family: %s, revision: %u\n",
677 name
, typename
, family_name(family
), revision
);
680 * First, and without any locks, allocate and initialize
681 * a normal base set structure.
683 set
= kzalloc(sizeof(struct ip_set
), GFP_KERNEL
);
686 rwlock_init(&set
->lock
);
687 strlcpy(set
->name
, name
, IPSET_MAXNAMELEN
);
688 set
->family
= family
;
689 set
->revision
= revision
;
692 * Next, check that we know the type, and take
693 * a reference on the type, to make sure it stays available
694 * while constructing our new set.
696 * After referencing the type, we try to create the type
697 * specific part of the set without holding any locks.
699 ret
= find_set_type_get(typename
, family
, revision
, &(set
->type
));
704 * Without holding any locks, create private part.
706 if (attr
[IPSET_ATTR_DATA
] &&
707 nla_parse_nested(tb
, IPSET_ATTR_CREATE_MAX
, attr
[IPSET_ATTR_DATA
],
708 set
->type
->create_policy
)) {
709 ret
= -IPSET_ERR_PROTOCOL
;
713 ret
= set
->type
->create(set
, tb
, flags
);
717 /* BTW, ret==0 here. */
720 * Here, we have a valid, constructed set and we are protected
721 * by the nfnl mutex. Find the first free index in ip_set_list
722 * and check clashing.
724 if ((ret
= find_free_id(set
->name
, &index
, &clash
)) != 0) {
725 /* If this is the same set and requested, ignore error */
726 if (ret
== -EEXIST
&&
727 (flags
& IPSET_FLAG_EXIST
) &&
728 STREQ(set
->type
->name
, clash
->type
->name
) &&
729 set
->type
->family
== clash
->type
->family
&&
730 set
->type
->revision_min
== clash
->type
->revision_min
&&
731 set
->type
->revision_max
== clash
->type
->revision_max
&&
732 set
->variant
->same_set(set
, clash
))
738 * Finally! Add our shiny new set to the list, and be done.
740 pr_debug("create: '%s' created with index %u!\n", set
->name
, index
);
741 ip_set_list
[index
] = set
;
746 set
->variant
->destroy(set
);
748 module_put(set
->type
->me
);
756 static const struct nla_policy
757 ip_set_setname_policy
[IPSET_ATTR_CMD_MAX
+ 1] = {
758 [IPSET_ATTR_PROTOCOL
] = { .type
= NLA_U8
},
759 [IPSET_ATTR_SETNAME
] = { .type
= NLA_NUL_STRING
,
760 .len
= IPSET_MAXNAMELEN
- 1 },
764 ip_set_destroy_set(ip_set_id_t index
)
766 struct ip_set
*set
= ip_set_list
[index
];
768 pr_debug("set: %s\n", set
->name
);
769 ip_set_list
[index
] = NULL
;
771 /* Must call it without holding any lock */
772 set
->variant
->destroy(set
);
773 module_put(set
->type
->me
);
778 ip_set_destroy(struct sock
*ctnl
, struct sk_buff
*skb
,
779 const struct nlmsghdr
*nlh
,
780 const struct nlattr
* const attr
[])
785 if (unlikely(protocol_failed(attr
)))
786 return -IPSET_ERR_PROTOCOL
;
788 /* Commands are serialized and references are
789 * protected by the ip_set_ref_lock.
790 * External systems (i.e. xt_set) must call
791 * ip_set_put|get_nfnl_* functions, that way we
792 * can safely check references here.
794 * list:set timer can only decrement the reference
795 * counter, so if it's already zero, we can proceed
796 * without holding the lock.
798 read_lock_bh(&ip_set_ref_lock
);
799 if (!attr
[IPSET_ATTR_SETNAME
]) {
800 for (i
= 0; i
< ip_set_max
; i
++) {
801 if (ip_set_list
[i
] != NULL
&& ip_set_list
[i
]->ref
) {
802 ret
= -IPSET_ERR_BUSY
;
806 read_unlock_bh(&ip_set_ref_lock
);
807 for (i
= 0; i
< ip_set_max
; i
++) {
808 if (ip_set_list
[i
] != NULL
)
809 ip_set_destroy_set(i
);
812 i
= find_set_id(nla_data(attr
[IPSET_ATTR_SETNAME
]));
813 if (i
== IPSET_INVALID_ID
) {
816 } else if (ip_set_list
[i
]->ref
) {
817 ret
= -IPSET_ERR_BUSY
;
820 read_unlock_bh(&ip_set_ref_lock
);
822 ip_set_destroy_set(i
);
826 read_unlock_bh(&ip_set_ref_lock
);
833 ip_set_flush_set(struct ip_set
*set
)
835 pr_debug("set: %s\n", set
->name
);
837 write_lock_bh(&set
->lock
);
838 set
->variant
->flush(set
);
839 write_unlock_bh(&set
->lock
);
843 ip_set_flush(struct sock
*ctnl
, struct sk_buff
*skb
,
844 const struct nlmsghdr
*nlh
,
845 const struct nlattr
* const attr
[])
849 if (unlikely(protocol_failed(attr
)))
850 return -IPSET_ERR_PROTOCOL
;
852 if (!attr
[IPSET_ATTR_SETNAME
]) {
853 for (i
= 0; i
< ip_set_max
; i
++)
854 if (ip_set_list
[i
] != NULL
)
855 ip_set_flush_set(ip_set_list
[i
]);
857 i
= find_set_id(nla_data(attr
[IPSET_ATTR_SETNAME
]));
858 if (i
== IPSET_INVALID_ID
)
861 ip_set_flush_set(ip_set_list
[i
]);
869 static const struct nla_policy
870 ip_set_setname2_policy
[IPSET_ATTR_CMD_MAX
+ 1] = {
871 [IPSET_ATTR_PROTOCOL
] = { .type
= NLA_U8
},
872 [IPSET_ATTR_SETNAME
] = { .type
= NLA_NUL_STRING
,
873 .len
= IPSET_MAXNAMELEN
- 1 },
874 [IPSET_ATTR_SETNAME2
] = { .type
= NLA_NUL_STRING
,
875 .len
= IPSET_MAXNAMELEN
- 1 },
879 ip_set_rename(struct sock
*ctnl
, struct sk_buff
*skb
,
880 const struct nlmsghdr
*nlh
,
881 const struct nlattr
* const attr
[])
888 if (unlikely(protocol_failed(attr
) ||
889 attr
[IPSET_ATTR_SETNAME
] == NULL
||
890 attr
[IPSET_ATTR_SETNAME2
] == NULL
))
891 return -IPSET_ERR_PROTOCOL
;
893 set
= find_set(nla_data(attr
[IPSET_ATTR_SETNAME
]));
897 read_lock_bh(&ip_set_ref_lock
);
899 ret
= -IPSET_ERR_REFERENCED
;
903 name2
= nla_data(attr
[IPSET_ATTR_SETNAME2
]);
904 for (i
= 0; i
< ip_set_max
; i
++) {
905 if (ip_set_list
[i
] != NULL
&&
906 STREQ(ip_set_list
[i
]->name
, name2
)) {
907 ret
= -IPSET_ERR_EXIST_SETNAME2
;
911 strncpy(set
->name
, name2
, IPSET_MAXNAMELEN
);
914 read_unlock_bh(&ip_set_ref_lock
);
918 /* Swap two sets so that name/index points to the other.
919 * References and set names are also swapped.
921 * The commands are serialized by the nfnl mutex and references are
922 * protected by the ip_set_ref_lock. The kernel interfaces
923 * do not hold the mutex but the pointer settings are atomic
924 * so the ip_set_list always contains valid pointers to the sets.
928 ip_set_swap(struct sock
*ctnl
, struct sk_buff
*skb
,
929 const struct nlmsghdr
*nlh
,
930 const struct nlattr
* const attr
[])
932 struct ip_set
*from
, *to
;
933 ip_set_id_t from_id
, to_id
;
934 char from_name
[IPSET_MAXNAMELEN
];
936 if (unlikely(protocol_failed(attr
) ||
937 attr
[IPSET_ATTR_SETNAME
] == NULL
||
938 attr
[IPSET_ATTR_SETNAME2
] == NULL
))
939 return -IPSET_ERR_PROTOCOL
;
941 from_id
= find_set_id(nla_data(attr
[IPSET_ATTR_SETNAME
]));
942 if (from_id
== IPSET_INVALID_ID
)
945 to_id
= find_set_id(nla_data(attr
[IPSET_ATTR_SETNAME2
]));
946 if (to_id
== IPSET_INVALID_ID
)
947 return -IPSET_ERR_EXIST_SETNAME2
;
949 from
= ip_set_list
[from_id
];
950 to
= ip_set_list
[to_id
];
952 /* Features must not change.
953 * Not an artificial restriction anymore, as we must prevent
954 * possible loops created by swapping in setlist type of sets. */
955 if (!(from
->type
->features
== to
->type
->features
&&
956 from
->type
->family
== to
->type
->family
))
957 return -IPSET_ERR_TYPE_MISMATCH
;
959 strncpy(from_name
, from
->name
, IPSET_MAXNAMELEN
);
960 strncpy(from
->name
, to
->name
, IPSET_MAXNAMELEN
);
961 strncpy(to
->name
, from_name
, IPSET_MAXNAMELEN
);
963 write_lock_bh(&ip_set_ref_lock
);
964 swap(from
->ref
, to
->ref
);
965 ip_set_list
[from_id
] = to
;
966 ip_set_list
[to_id
] = from
;
967 write_unlock_bh(&ip_set_ref_lock
);
972 /* List/save set data */
979 #define DUMP_TYPE(arg) (((u32)(arg)) & 0x0000FFFF)
980 #define DUMP_FLAGS(arg) (((u32)(arg)) >> 16)
983 ip_set_dump_done(struct netlink_callback
*cb
)
986 pr_debug("release set %s\n", ip_set_list
[cb
->args
[1]]->name
);
987 ip_set_put_byindex((ip_set_id_t
) cb
->args
[1]);
993 dump_attrs(struct nlmsghdr
*nlh
)
995 const struct nlattr
*attr
;
998 pr_debug("dump nlmsg\n");
999 nlmsg_for_each_attr(attr
, nlh
, sizeof(struct nfgenmsg
), rem
) {
1000 pr_debug("type: %u, len %u\n", nla_type(attr
), attr
->nla_len
);
1005 dump_init(struct netlink_callback
*cb
)
1007 struct nlmsghdr
*nlh
= nlmsg_hdr(cb
->skb
);
1008 int min_len
= NLMSG_SPACE(sizeof(struct nfgenmsg
));
1009 struct nlattr
*cda
[IPSET_ATTR_CMD_MAX
+1];
1010 struct nlattr
*attr
= (void *)nlh
+ min_len
;
1014 /* Second pass, so parser can't fail */
1015 nla_parse(cda
, IPSET_ATTR_CMD_MAX
,
1016 attr
, nlh
->nlmsg_len
- min_len
, ip_set_setname_policy
);
1018 /* cb->args[0] : dump single set/all sets
1020 * [..]: type specific
1023 if (cda
[IPSET_ATTR_SETNAME
]) {
1024 index
= find_set_id(nla_data(cda
[IPSET_ATTR_SETNAME
]));
1025 if (index
== IPSET_INVALID_ID
)
1028 dump_type
= DUMP_ONE
;
1029 cb
->args
[1] = index
;
1031 dump_type
= DUMP_ALL
;
1033 if (cda
[IPSET_ATTR_FLAGS
]) {
1034 u32 f
= ip_set_get_h32(cda
[IPSET_ATTR_FLAGS
]);
1035 dump_type
|= (f
<< 16);
1037 cb
->args
[0] = dump_type
;
1043 ip_set_dump_start(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1045 ip_set_id_t index
= IPSET_INVALID_ID
, max
;
1046 struct ip_set
*set
= NULL
;
1047 struct nlmsghdr
*nlh
= NULL
;
1048 unsigned int flags
= NETLINK_CB(cb
->skb
).portid
? NLM_F_MULTI
: 0;
1049 u32 dump_type
, dump_flags
;
1053 ret
= dump_init(cb
);
1055 nlh
= nlmsg_hdr(cb
->skb
);
1056 /* We have to create and send the error message
1058 if (nlh
->nlmsg_flags
& NLM_F_ACK
)
1059 netlink_ack(cb
->skb
, nlh
, ret
);
1064 if (cb
->args
[1] >= ip_set_max
)
1067 dump_type
= DUMP_TYPE(cb
->args
[0]);
1068 dump_flags
= DUMP_FLAGS(cb
->args
[0]);
1069 max
= dump_type
== DUMP_ONE
? cb
->args
[1] + 1 : ip_set_max
;
1071 pr_debug("args[0]: %u %u args[1]: %ld\n",
1072 dump_type
, dump_flags
, cb
->args
[1]);
1073 for (; cb
->args
[1] < max
; cb
->args
[1]++) {
1074 index
= (ip_set_id_t
) cb
->args
[1];
1075 set
= ip_set_list
[index
];
1077 if (dump_type
== DUMP_ONE
) {
1083 /* When dumping all sets, we must dump "sorted"
1084 * so that lists (unions of sets) are dumped last.
1086 if (dump_type
!= DUMP_ONE
&&
1087 ((dump_type
== DUMP_ALL
) ==
1088 !!(set
->type
->features
& IPSET_DUMP_LAST
)))
1090 pr_debug("List set: %s\n", set
->name
);
1092 /* Start listing: make sure set won't be destroyed */
1093 pr_debug("reference set\n");
1094 __ip_set_get(index
);
1096 nlh
= start_msg(skb
, NETLINK_CB(cb
->skb
).portid
,
1097 cb
->nlh
->nlmsg_seq
, flags
,
1101 goto release_refcount
;
1103 if (nla_put_u8(skb
, IPSET_ATTR_PROTOCOL
, IPSET_PROTOCOL
) ||
1104 nla_put_string(skb
, IPSET_ATTR_SETNAME
, set
->name
))
1105 goto nla_put_failure
;
1106 if (dump_flags
& IPSET_FLAG_LIST_SETNAME
)
1108 switch (cb
->args
[2]) {
1110 /* Core header data */
1111 if (nla_put_string(skb
, IPSET_ATTR_TYPENAME
,
1113 nla_put_u8(skb
, IPSET_ATTR_FAMILY
,
1115 nla_put_u8(skb
, IPSET_ATTR_REVISION
,
1117 goto nla_put_failure
;
1118 ret
= set
->variant
->head(set
, skb
);
1120 goto release_refcount
;
1121 if (dump_flags
& IPSET_FLAG_LIST_HEADER
)
1123 /* Fall through and add elements */
1125 read_lock_bh(&set
->lock
);
1126 ret
= set
->variant
->list(set
, skb
, cb
);
1127 read_unlock_bh(&set
->lock
);
1129 /* Set is done, proceed with next one */
1131 goto release_refcount
;
1134 /* If we dump all sets, continue with dumping last ones */
1135 if (dump_type
== DUMP_ALL
) {
1136 dump_type
= DUMP_LAST
;
1137 cb
->args
[0] = dump_type
| (dump_flags
<< 16);
1146 if (dump_type
== DUMP_ONE
)
1147 cb
->args
[1] = IPSET_INVALID_ID
;
1151 /* If there was an error or set is done, release set */
1152 if (ret
|| !cb
->args
[2]) {
1153 pr_debug("release set %s\n", ip_set_list
[index
]->name
);
1154 ip_set_put_byindex(index
);
1159 nlmsg_end(skb
, nlh
);
1160 pr_debug("nlmsg_len: %u\n", nlh
->nlmsg_len
);
1164 return ret
< 0 ? ret
: skb
->len
;
1168 ip_set_dump(struct sock
*ctnl
, struct sk_buff
*skb
,
1169 const struct nlmsghdr
*nlh
,
1170 const struct nlattr
* const attr
[])
1172 if (unlikely(protocol_failed(attr
)))
1173 return -IPSET_ERR_PROTOCOL
;
1176 struct netlink_dump_control c
= {
1177 .dump
= ip_set_dump_start
,
1178 .done
= ip_set_dump_done
,
1180 return netlink_dump_start(ctnl
, skb
, nlh
, &c
);
1184 /* Add, del and test */
1186 static const struct nla_policy ip_set_adt_policy
[IPSET_ATTR_CMD_MAX
+ 1] = {
1187 [IPSET_ATTR_PROTOCOL
] = { .type
= NLA_U8
},
1188 [IPSET_ATTR_SETNAME
] = { .type
= NLA_NUL_STRING
,
1189 .len
= IPSET_MAXNAMELEN
- 1 },
1190 [IPSET_ATTR_LINENO
] = { .type
= NLA_U32
},
1191 [IPSET_ATTR_DATA
] = { .type
= NLA_NESTED
},
1192 [IPSET_ATTR_ADT
] = { .type
= NLA_NESTED
},
1196 call_ad(struct sock
*ctnl
, struct sk_buff
*skb
, struct ip_set
*set
,
1197 struct nlattr
*tb
[], enum ipset_adt adt
,
1198 u32 flags
, bool use_lineno
)
1202 bool eexist
= flags
& IPSET_FLAG_EXIST
, retried
= false;
1205 write_lock_bh(&set
->lock
);
1206 ret
= set
->variant
->uadt(set
, tb
, adt
, &lineno
, flags
, retried
);
1207 write_unlock_bh(&set
->lock
);
1209 } while (ret
== -EAGAIN
&&
1210 set
->variant
->resize
&&
1211 (ret
= set
->variant
->resize(set
, retried
)) == 0);
1213 if (!ret
|| (ret
== -IPSET_ERR_EXIST
&& eexist
))
1215 if (lineno
&& use_lineno
) {
1216 /* Error in restore/batch mode: send back lineno */
1217 struct nlmsghdr
*rep
, *nlh
= nlmsg_hdr(skb
);
1218 struct sk_buff
*skb2
;
1219 struct nlmsgerr
*errmsg
;
1220 size_t payload
= sizeof(*errmsg
) + nlmsg_len(nlh
);
1221 int min_len
= NLMSG_SPACE(sizeof(struct nfgenmsg
));
1222 struct nlattr
*cda
[IPSET_ATTR_CMD_MAX
+1];
1223 struct nlattr
*cmdattr
;
1226 skb2
= nlmsg_new(payload
, GFP_KERNEL
);
1229 rep
= __nlmsg_put(skb2
, NETLINK_CB(skb
).portid
,
1230 nlh
->nlmsg_seq
, NLMSG_ERROR
, payload
, 0);
1231 errmsg
= nlmsg_data(rep
);
1232 errmsg
->error
= ret
;
1233 memcpy(&errmsg
->msg
, nlh
, nlh
->nlmsg_len
);
1234 cmdattr
= (void *)&errmsg
->msg
+ min_len
;
1236 nla_parse(cda
, IPSET_ATTR_CMD_MAX
,
1237 cmdattr
, nlh
->nlmsg_len
- min_len
,
1240 errline
= nla_data(cda
[IPSET_ATTR_LINENO
]);
1244 netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1245 /* Signal netlink not to send its ACK/errmsg. */
1253 ip_set_uadd(struct sock
*ctnl
, struct sk_buff
*skb
,
1254 const struct nlmsghdr
*nlh
,
1255 const struct nlattr
* const attr
[])
1258 struct nlattr
*tb
[IPSET_ATTR_ADT_MAX
+1] = {};
1259 const struct nlattr
*nla
;
1260 u32 flags
= flag_exist(nlh
);
1264 if (unlikely(protocol_failed(attr
) ||
1265 attr
[IPSET_ATTR_SETNAME
] == NULL
||
1266 !((attr
[IPSET_ATTR_DATA
] != NULL
) ^
1267 (attr
[IPSET_ATTR_ADT
] != NULL
)) ||
1268 (attr
[IPSET_ATTR_DATA
] != NULL
&&
1269 !flag_nested(attr
[IPSET_ATTR_DATA
])) ||
1270 (attr
[IPSET_ATTR_ADT
] != NULL
&&
1271 (!flag_nested(attr
[IPSET_ATTR_ADT
]) ||
1272 attr
[IPSET_ATTR_LINENO
] == NULL
))))
1273 return -IPSET_ERR_PROTOCOL
;
1275 set
= find_set(nla_data(attr
[IPSET_ATTR_SETNAME
]));
1279 use_lineno
= !!attr
[IPSET_ATTR_LINENO
];
1280 if (attr
[IPSET_ATTR_DATA
]) {
1281 if (nla_parse_nested(tb
, IPSET_ATTR_ADT_MAX
,
1282 attr
[IPSET_ATTR_DATA
],
1283 set
->type
->adt_policy
))
1284 return -IPSET_ERR_PROTOCOL
;
1285 ret
= call_ad(ctnl
, skb
, set
, tb
, IPSET_ADD
, flags
,
1290 nla_for_each_nested(nla
, attr
[IPSET_ATTR_ADT
], nla_rem
) {
1291 memset(tb
, 0, sizeof(tb
));
1292 if (nla_type(nla
) != IPSET_ATTR_DATA
||
1293 !flag_nested(nla
) ||
1294 nla_parse_nested(tb
, IPSET_ATTR_ADT_MAX
, nla
,
1295 set
->type
->adt_policy
))
1296 return -IPSET_ERR_PROTOCOL
;
1297 ret
= call_ad(ctnl
, skb
, set
, tb
, IPSET_ADD
,
1307 ip_set_udel(struct sock
*ctnl
, struct sk_buff
*skb
,
1308 const struct nlmsghdr
*nlh
,
1309 const struct nlattr
* const attr
[])
1312 struct nlattr
*tb
[IPSET_ATTR_ADT_MAX
+1] = {};
1313 const struct nlattr
*nla
;
1314 u32 flags
= flag_exist(nlh
);
1318 if (unlikely(protocol_failed(attr
) ||
1319 attr
[IPSET_ATTR_SETNAME
] == NULL
||
1320 !((attr
[IPSET_ATTR_DATA
] != NULL
) ^
1321 (attr
[IPSET_ATTR_ADT
] != NULL
)) ||
1322 (attr
[IPSET_ATTR_DATA
] != NULL
&&
1323 !flag_nested(attr
[IPSET_ATTR_DATA
])) ||
1324 (attr
[IPSET_ATTR_ADT
] != NULL
&&
1325 (!flag_nested(attr
[IPSET_ATTR_ADT
]) ||
1326 attr
[IPSET_ATTR_LINENO
] == NULL
))))
1327 return -IPSET_ERR_PROTOCOL
;
1329 set
= find_set(nla_data(attr
[IPSET_ATTR_SETNAME
]));
1333 use_lineno
= !!attr
[IPSET_ATTR_LINENO
];
1334 if (attr
[IPSET_ATTR_DATA
]) {
1335 if (nla_parse_nested(tb
, IPSET_ATTR_ADT_MAX
,
1336 attr
[IPSET_ATTR_DATA
],
1337 set
->type
->adt_policy
))
1338 return -IPSET_ERR_PROTOCOL
;
1339 ret
= call_ad(ctnl
, skb
, set
, tb
, IPSET_DEL
, flags
,
1344 nla_for_each_nested(nla
, attr
[IPSET_ATTR_ADT
], nla_rem
) {
1345 memset(tb
, 0, sizeof(*tb
));
1346 if (nla_type(nla
) != IPSET_ATTR_DATA
||
1347 !flag_nested(nla
) ||
1348 nla_parse_nested(tb
, IPSET_ATTR_ADT_MAX
, nla
,
1349 set
->type
->adt_policy
))
1350 return -IPSET_ERR_PROTOCOL
;
1351 ret
= call_ad(ctnl
, skb
, set
, tb
, IPSET_DEL
,
1361 ip_set_utest(struct sock
*ctnl
, struct sk_buff
*skb
,
1362 const struct nlmsghdr
*nlh
,
1363 const struct nlattr
* const attr
[])
1366 struct nlattr
*tb
[IPSET_ATTR_ADT_MAX
+1] = {};
1369 if (unlikely(protocol_failed(attr
) ||
1370 attr
[IPSET_ATTR_SETNAME
] == NULL
||
1371 attr
[IPSET_ATTR_DATA
] == NULL
||
1372 !flag_nested(attr
[IPSET_ATTR_DATA
])))
1373 return -IPSET_ERR_PROTOCOL
;
1375 set
= find_set(nla_data(attr
[IPSET_ATTR_SETNAME
]));
1379 if (nla_parse_nested(tb
, IPSET_ATTR_ADT_MAX
, attr
[IPSET_ATTR_DATA
],
1380 set
->type
->adt_policy
))
1381 return -IPSET_ERR_PROTOCOL
;
1383 read_lock_bh(&set
->lock
);
1384 ret
= set
->variant
->uadt(set
, tb
, IPSET_TEST
, NULL
, 0, 0);
1385 read_unlock_bh(&set
->lock
);
1386 /* Userspace can't trigger element to be re-added */
1390 return ret
< 0 ? ret
: ret
> 0 ? 0 : -IPSET_ERR_EXIST
;
1393 /* Get headed data of a set */
1396 ip_set_header(struct sock
*ctnl
, struct sk_buff
*skb
,
1397 const struct nlmsghdr
*nlh
,
1398 const struct nlattr
* const attr
[])
1400 const struct ip_set
*set
;
1401 struct sk_buff
*skb2
;
1402 struct nlmsghdr
*nlh2
;
1406 if (unlikely(protocol_failed(attr
) ||
1407 attr
[IPSET_ATTR_SETNAME
] == NULL
))
1408 return -IPSET_ERR_PROTOCOL
;
1410 index
= find_set_id(nla_data(attr
[IPSET_ATTR_SETNAME
]));
1411 if (index
== IPSET_INVALID_ID
)
1413 set
= ip_set_list
[index
];
1415 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1419 nlh2
= start_msg(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
, 0,
1423 if (nla_put_u8(skb2
, IPSET_ATTR_PROTOCOL
, IPSET_PROTOCOL
) ||
1424 nla_put_string(skb2
, IPSET_ATTR_SETNAME
, set
->name
) ||
1425 nla_put_string(skb2
, IPSET_ATTR_TYPENAME
, set
->type
->name
) ||
1426 nla_put_u8(skb2
, IPSET_ATTR_FAMILY
, set
->family
) ||
1427 nla_put_u8(skb2
, IPSET_ATTR_REVISION
, set
->revision
))
1428 goto nla_put_failure
;
1429 nlmsg_end(skb2
, nlh2
);
1431 ret
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1438 nlmsg_cancel(skb2
, nlh2
);
1446 static const struct nla_policy ip_set_type_policy
[IPSET_ATTR_CMD_MAX
+ 1] = {
1447 [IPSET_ATTR_PROTOCOL
] = { .type
= NLA_U8
},
1448 [IPSET_ATTR_TYPENAME
] = { .type
= NLA_NUL_STRING
,
1449 .len
= IPSET_MAXNAMELEN
- 1 },
1450 [IPSET_ATTR_FAMILY
] = { .type
= NLA_U8
},
1454 ip_set_type(struct sock
*ctnl
, struct sk_buff
*skb
,
1455 const struct nlmsghdr
*nlh
,
1456 const struct nlattr
* const attr
[])
1458 struct sk_buff
*skb2
;
1459 struct nlmsghdr
*nlh2
;
1460 u8 family
, min
, max
;
1461 const char *typename
;
1464 if (unlikely(protocol_failed(attr
) ||
1465 attr
[IPSET_ATTR_TYPENAME
] == NULL
||
1466 attr
[IPSET_ATTR_FAMILY
] == NULL
))
1467 return -IPSET_ERR_PROTOCOL
;
1469 family
= nla_get_u8(attr
[IPSET_ATTR_FAMILY
]);
1470 typename
= nla_data(attr
[IPSET_ATTR_TYPENAME
]);
1471 ret
= find_set_type_minmax(typename
, family
, &min
, &max
);
1475 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1479 nlh2
= start_msg(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
, 0,
1483 if (nla_put_u8(skb2
, IPSET_ATTR_PROTOCOL
, IPSET_PROTOCOL
) ||
1484 nla_put_string(skb2
, IPSET_ATTR_TYPENAME
, typename
) ||
1485 nla_put_u8(skb2
, IPSET_ATTR_FAMILY
, family
) ||
1486 nla_put_u8(skb2
, IPSET_ATTR_REVISION
, max
) ||
1487 nla_put_u8(skb2
, IPSET_ATTR_REVISION_MIN
, min
))
1488 goto nla_put_failure
;
1489 nlmsg_end(skb2
, nlh2
);
1491 pr_debug("Send TYPE, nlmsg_len: %u\n", nlh2
->nlmsg_len
);
1492 ret
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1499 nlmsg_cancel(skb2
, nlh2
);
1505 /* Get protocol version */
1507 static const struct nla_policy
1508 ip_set_protocol_policy
[IPSET_ATTR_CMD_MAX
+ 1] = {
1509 [IPSET_ATTR_PROTOCOL
] = { .type
= NLA_U8
},
1513 ip_set_protocol(struct sock
*ctnl
, struct sk_buff
*skb
,
1514 const struct nlmsghdr
*nlh
,
1515 const struct nlattr
* const attr
[])
1517 struct sk_buff
*skb2
;
1518 struct nlmsghdr
*nlh2
;
1521 if (unlikely(attr
[IPSET_ATTR_PROTOCOL
] == NULL
))
1522 return -IPSET_ERR_PROTOCOL
;
1524 skb2
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1528 nlh2
= start_msg(skb2
, NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
, 0,
1529 IPSET_CMD_PROTOCOL
);
1532 if (nla_put_u8(skb2
, IPSET_ATTR_PROTOCOL
, IPSET_PROTOCOL
))
1533 goto nla_put_failure
;
1534 nlmsg_end(skb2
, nlh2
);
1536 ret
= netlink_unicast(ctnl
, skb2
, NETLINK_CB(skb
).portid
, MSG_DONTWAIT
);
1543 nlmsg_cancel(skb2
, nlh2
);
1549 static const struct nfnl_callback ip_set_netlink_subsys_cb
[IPSET_MSG_MAX
] = {
1550 [IPSET_CMD_NONE
] = {
1551 .call
= ip_set_none
,
1552 .attr_count
= IPSET_ATTR_CMD_MAX
,
1554 [IPSET_CMD_CREATE
] = {
1555 .call
= ip_set_create
,
1556 .attr_count
= IPSET_ATTR_CMD_MAX
,
1557 .policy
= ip_set_create_policy
,
1559 [IPSET_CMD_DESTROY
] = {
1560 .call
= ip_set_destroy
,
1561 .attr_count
= IPSET_ATTR_CMD_MAX
,
1562 .policy
= ip_set_setname_policy
,
1564 [IPSET_CMD_FLUSH
] = {
1565 .call
= ip_set_flush
,
1566 .attr_count
= IPSET_ATTR_CMD_MAX
,
1567 .policy
= ip_set_setname_policy
,
1569 [IPSET_CMD_RENAME
] = {
1570 .call
= ip_set_rename
,
1571 .attr_count
= IPSET_ATTR_CMD_MAX
,
1572 .policy
= ip_set_setname2_policy
,
1574 [IPSET_CMD_SWAP
] = {
1575 .call
= ip_set_swap
,
1576 .attr_count
= IPSET_ATTR_CMD_MAX
,
1577 .policy
= ip_set_setname2_policy
,
1579 [IPSET_CMD_LIST
] = {
1580 .call
= ip_set_dump
,
1581 .attr_count
= IPSET_ATTR_CMD_MAX
,
1582 .policy
= ip_set_setname_policy
,
1584 [IPSET_CMD_SAVE
] = {
1585 .call
= ip_set_dump
,
1586 .attr_count
= IPSET_ATTR_CMD_MAX
,
1587 .policy
= ip_set_setname_policy
,
1590 .call
= ip_set_uadd
,
1591 .attr_count
= IPSET_ATTR_CMD_MAX
,
1592 .policy
= ip_set_adt_policy
,
1595 .call
= ip_set_udel
,
1596 .attr_count
= IPSET_ATTR_CMD_MAX
,
1597 .policy
= ip_set_adt_policy
,
1599 [IPSET_CMD_TEST
] = {
1600 .call
= ip_set_utest
,
1601 .attr_count
= IPSET_ATTR_CMD_MAX
,
1602 .policy
= ip_set_adt_policy
,
1604 [IPSET_CMD_HEADER
] = {
1605 .call
= ip_set_header
,
1606 .attr_count
= IPSET_ATTR_CMD_MAX
,
1607 .policy
= ip_set_setname_policy
,
1609 [IPSET_CMD_TYPE
] = {
1610 .call
= ip_set_type
,
1611 .attr_count
= IPSET_ATTR_CMD_MAX
,
1612 .policy
= ip_set_type_policy
,
1614 [IPSET_CMD_PROTOCOL
] = {
1615 .call
= ip_set_protocol
,
1616 .attr_count
= IPSET_ATTR_CMD_MAX
,
1617 .policy
= ip_set_protocol_policy
,
1621 static struct nfnetlink_subsystem ip_set_netlink_subsys __read_mostly
= {
1623 .subsys_id
= NFNL_SUBSYS_IPSET
,
1624 .cb_count
= IPSET_MSG_MAX
,
1625 .cb
= ip_set_netlink_subsys_cb
,
1628 /* Interface to iptables/ip6tables */
1631 ip_set_sockfn_get(struct sock
*sk
, int optval
, void __user
*user
, int *len
)
1635 int copylen
= *len
, ret
= 0;
1637 if (!capable(CAP_NET_ADMIN
))
1639 if (optval
!= SO_IP_SET
)
1641 if (*len
< sizeof(unsigned int))
1644 data
= vmalloc(*len
);
1647 if (copy_from_user(data
, user
, *len
) != 0) {
1651 op
= (unsigned int *) data
;
1653 if (*op
< IP_SET_OP_VERSION
) {
1654 /* Check the version at the beginning of operations */
1655 struct ip_set_req_version
*req_version
= data
;
1656 if (req_version
->version
!= IPSET_PROTOCOL
) {
1663 case IP_SET_OP_VERSION
: {
1664 struct ip_set_req_version
*req_version
= data
;
1666 if (*len
!= sizeof(struct ip_set_req_version
)) {
1671 req_version
->version
= IPSET_PROTOCOL
;
1672 ret
= copy_to_user(user
, req_version
,
1673 sizeof(struct ip_set_req_version
));
1676 case IP_SET_OP_GET_BYNAME
: {
1677 struct ip_set_req_get_set
*req_get
= data
;
1679 if (*len
!= sizeof(struct ip_set_req_get_set
)) {
1683 req_get
->set
.name
[IPSET_MAXNAMELEN
- 1] = '\0';
1685 req_get
->set
.index
= find_set_id(req_get
->set
.name
);
1689 case IP_SET_OP_GET_BYINDEX
: {
1690 struct ip_set_req_get_set
*req_get
= data
;
1692 if (*len
!= sizeof(struct ip_set_req_get_set
) ||
1693 req_get
->set
.index
>= ip_set_max
) {
1698 strncpy(req_get
->set
.name
,
1699 ip_set_list
[req_get
->set
.index
]
1700 ? ip_set_list
[req_get
->set
.index
]->name
: "",
1708 } /* end of switch(op) */
1711 ret
= copy_to_user(user
, data
, copylen
);
1720 static struct nf_sockopt_ops so_set __read_mostly
= {
1722 .get_optmin
= SO_IP_SET
,
1723 .get_optmax
= SO_IP_SET
+ 1,
1724 .get
= &ip_set_sockfn_get
,
1725 .owner
= THIS_MODULE
,
1734 ip_set_max
= max_sets
;
1735 if (ip_set_max
>= IPSET_INVALID_ID
)
1736 ip_set_max
= IPSET_INVALID_ID
- 1;
1738 ip_set_list
= kzalloc(sizeof(struct ip_set
*) * ip_set_max
,
1743 ret
= nfnetlink_subsys_register(&ip_set_netlink_subsys
);
1745 pr_err("ip_set: cannot register with nfnetlink.\n");
1749 ret
= nf_register_sockopt(&so_set
);
1751 pr_err("SO_SET registry failed: %d\n", ret
);
1752 nfnetlink_subsys_unregister(&ip_set_netlink_subsys
);
1757 pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL
);
1764 /* There can't be any existing set */
1765 nf_unregister_sockopt(&so_set
);
1766 nfnetlink_subsys_unregister(&ip_set_netlink_subsys
);
1768 pr_debug("these are the famous last words\n");
1771 module_init(ip_set_init
);
1772 module_exit(ip_set_fini
);