2 * NETLINK Generic Netlink Family
4 * Authors: Jamal Hadi Salim
5 * Thomas Graf <tgraf@suug.ch>
6 * Johannes Berg <johannes@sipsolutions.net>
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/slab.h>
12 #include <linux/errno.h>
13 #include <linux/types.h>
14 #include <linux/socket.h>
15 #include <linux/string.h>
16 #include <linux/skbuff.h>
17 #include <linux/mutex.h>
18 #include <linux/bitmap.h>
19 #include <linux/rwsem.h>
21 #include <net/genetlink.h>
23 static DEFINE_MUTEX(genl_mutex); /* serialization of message processing */
24 static DECLARE_RWSEM(cb_lock);
28 mutex_lock(&genl_mutex);
30 EXPORT_SYMBOL(genl_lock);
32 void genl_unlock(void)
34 mutex_unlock(&genl_mutex);
36 EXPORT_SYMBOL(genl_unlock);
39 int lockdep_genl_is_held(void)
41 return lockdep_is_held(&genl_mutex);
43 EXPORT_SYMBOL(lockdep_genl_is_held);
46 static void genl_lock_all(void)
52 static void genl_unlock_all(void)
58 #define GENL_FAM_TAB_SIZE 16
59 #define GENL_FAM_TAB_MASK (GENL_FAM_TAB_SIZE - 1)
61 static struct list_head family_ht[GENL_FAM_TAB_SIZE];
63 * Bitmap of multicast groups that are currently in use.
65 * To avoid an allocation at boot of just one unsigned long,
66 * declare it global instead.
67 * Bit 0 is marked as already used since group 0 is invalid.
69 static unsigned long mc_group_start = 0x1;
70 static unsigned long *mc_groups = &mc_group_start;
71 static unsigned long mc_groups_longs = 1;
73 static int genl_ctrl_event(int event, void *data);
75 static inline unsigned int genl_family_hash(unsigned int id)
77 return id & GENL_FAM_TAB_MASK;
80 static inline struct list_head *genl_family_chain(unsigned int id)
82 return &family_ht[genl_family_hash(id)];
85 static struct genl_family *genl_family_find_byid(unsigned int id)
87 struct genl_family *f;
89 list_for_each_entry(f, genl_family_chain(id), family_list)
96 static struct genl_family *genl_family_find_byname(char *name)
98 struct genl_family *f;
101 for (i = 0; i < GENL_FAM_TAB_SIZE; i++)
102 list_for_each_entry(f, genl_family_chain(i), family_list)
103 if (strcmp(f->name, name) == 0)
109 static struct genl_ops *genl_get_cmd(u8 cmd, struct genl_family *family)
111 struct genl_ops *ops;
113 list_for_each_entry(ops, &family->ops_list, ops_list)
120 /* Of course we are going to have problems once we hit
121 * 2^16 alive types, but that can only happen by year 2K
123 static u16 genl_generate_id(void)
125 static u16 id_gen_idx = GENL_MIN_ID;
128 for (i = 0; i <= GENL_MAX_ID - GENL_MIN_ID; i++) {
129 if (!genl_family_find_byid(id_gen_idx))
131 if (++id_gen_idx > GENL_MAX_ID)
132 id_gen_idx = GENL_MIN_ID;
138 static struct genl_multicast_group notify_grp;
141 * genl_register_mc_group - register a multicast group
143 * Registers the specified multicast group and notifies userspace
144 * about the new group.
146 * Returns 0 on success or a negative error code.
148 * @family: The generic netlink family the group shall be registered for.
149 * @grp: The group to register, must have a name.
151 int genl_register_mc_group(struct genl_family *family,
152 struct genl_multicast_group *grp)
155 unsigned long *new_groups;
158 BUG_ON(grp->name[0] == '\0');
159 BUG_ON(memchr(grp->name, '\0', GENL_NAMSIZ) == NULL);
163 /* special-case our own group */
164 if (grp == ¬ify_grp)
167 id = find_first_zero_bit(mc_groups,
168 mc_groups_longs * BITS_PER_LONG);
171 if (id >= mc_groups_longs * BITS_PER_LONG) {
172 size_t nlen = (mc_groups_longs + 1) * sizeof(unsigned long);
174 if (mc_groups == &mc_group_start) {
175 new_groups = kzalloc(nlen, GFP_KERNEL);
180 mc_groups = new_groups;
181 *mc_groups = mc_group_start;
183 new_groups = krealloc(mc_groups, nlen, GFP_KERNEL);
188 mc_groups = new_groups;
189 mc_groups[mc_groups_longs] = 0;
194 if (family->netnsok) {
197 netlink_table_grab();
199 for_each_net_rcu(net) {
200 err = __netlink_change_ngroups(net->genl_sock,
201 mc_groups_longs * BITS_PER_LONG);
204 * No need to roll back, can only fail if
205 * memory allocation fails and then the
206 * number of _possible_ groups has been
207 * increased on some sockets which is ok.
210 netlink_table_ungrab();
215 netlink_table_ungrab();
217 err = netlink_change_ngroups(init_net.genl_sock,
218 mc_groups_longs * BITS_PER_LONG);
224 set_bit(id, mc_groups);
225 list_add_tail(&grp->list, &family->mcast_groups);
226 grp->family = family;
228 genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, grp);
233 EXPORT_SYMBOL(genl_register_mc_group);
235 static void __genl_unregister_mc_group(struct genl_family *family,
236 struct genl_multicast_group *grp)
239 BUG_ON(grp->family != family);
241 netlink_table_grab();
243 for_each_net_rcu(net)
244 __netlink_clear_multicast_users(net->genl_sock, grp->id);
246 netlink_table_ungrab();
248 clear_bit(grp->id, mc_groups);
249 list_del(&grp->list);
250 genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, grp);
256 * genl_unregister_mc_group - unregister a multicast group
258 * Unregisters the specified multicast group and notifies userspace
259 * about it. All current listeners on the group are removed.
261 * Note: It is not necessary to unregister all multicast groups before
262 * unregistering the family, unregistering the family will cause
263 * all assigned multicast groups to be unregistered automatically.
265 * @family: Generic netlink family the group belongs to.
266 * @grp: The group to unregister, must have been registered successfully
269 void genl_unregister_mc_group(struct genl_family *family,
270 struct genl_multicast_group *grp)
273 __genl_unregister_mc_group(family, grp);
276 EXPORT_SYMBOL(genl_unregister_mc_group);
278 static void genl_unregister_mc_groups(struct genl_family *family)
280 struct genl_multicast_group *grp, *tmp;
282 list_for_each_entry_safe(grp, tmp, &family->mcast_groups, list)
283 __genl_unregister_mc_group(family, grp);
287 * genl_register_ops - register generic netlink operations
288 * @family: generic netlink family
289 * @ops: operations to be registered
291 * Registers the specified operations and assigns them to the specified
292 * family. Either a doit or dumpit callback must be specified or the
293 * operation will fail. Only one operation structure per command
294 * identifier may be registered.
296 * See include/net/genetlink.h for more documenation on the operations
299 * Returns 0 on success or a negative error code.
301 int genl_register_ops(struct genl_family *family, struct genl_ops *ops)
305 if (ops->dumpit == NULL && ops->doit == NULL)
308 if (genl_get_cmd(ops->cmd, family)) {
314 ops->flags |= GENL_CMD_CAP_DUMP;
316 ops->flags |= GENL_CMD_CAP_DO;
318 ops->flags |= GENL_CMD_CAP_HASPOL;
321 list_add_tail(&ops->ops_list, &family->ops_list);
324 genl_ctrl_event(CTRL_CMD_NEWOPS, ops);
329 EXPORT_SYMBOL(genl_register_ops);
332 * genl_unregister_ops - unregister generic netlink operations
333 * @family: generic netlink family
334 * @ops: operations to be unregistered
336 * Unregisters the specified operations and unassigns them from the
337 * specified family. The operation blocks until the current message
338 * processing has finished and doesn't start again until the
339 * unregister process has finished.
341 * Note: It is not necessary to unregister all operations before
342 * unregistering the family, unregistering the family will cause
343 * all assigned operations to be unregistered automatically.
345 * Returns 0 on success or a negative error code.
347 int genl_unregister_ops(struct genl_family *family, struct genl_ops *ops)
352 list_for_each_entry(rc, &family->ops_list, ops_list) {
354 list_del(&ops->ops_list);
356 genl_ctrl_event(CTRL_CMD_DELOPS, ops);
364 EXPORT_SYMBOL(genl_unregister_ops);
367 * genl_register_family - register a generic netlink family
368 * @family: generic netlink family
370 * Registers the specified family after validating it first. Only one
371 * family may be registered with the same family name or identifier.
372 * The family id may equal GENL_ID_GENERATE causing an unique id to
373 * be automatically generated and assigned.
375 * Return 0 on success or a negative error code.
377 int genl_register_family(struct genl_family *family)
381 if (family->id && family->id < GENL_MIN_ID)
384 if (family->id > GENL_MAX_ID)
387 INIT_LIST_HEAD(&family->ops_list);
388 INIT_LIST_HEAD(&family->mcast_groups);
392 if (genl_family_find_byname(family->name)) {
397 if (family->id == GENL_ID_GENERATE) {
398 u16 newid = genl_generate_id();
406 } else if (genl_family_find_byid(family->id)) {
411 if (family->maxattr && !family->parallel_ops) {
412 family->attrbuf = kmalloc((family->maxattr+1) *
413 sizeof(struct nlattr *), GFP_KERNEL);
414 if (family->attrbuf == NULL) {
419 family->attrbuf = NULL;
421 list_add_tail(&family->family_list, genl_family_chain(family->id));
424 genl_ctrl_event(CTRL_CMD_NEWFAMILY, family);
433 EXPORT_SYMBOL(genl_register_family);
436 * genl_register_family_with_ops - register a generic netlink family
437 * @family: generic netlink family
438 * @ops: operations to be registered
439 * @n_ops: number of elements to register
441 * Registers the specified family and operations from the specified table.
442 * Only one family may be registered with the same family name or identifier.
444 * The family id may equal GENL_ID_GENERATE causing an unique id to
445 * be automatically generated and assigned.
447 * Either a doit or dumpit callback must be specified for every registered
448 * operation or the function will fail. Only one operation structure per
449 * command identifier may be registered.
451 * See include/net/genetlink.h for more documenation on the operations
454 * This is equivalent to calling genl_register_family() followed by
455 * genl_register_ops() for every operation entry in the table taking
456 * care to unregister the family on error path.
458 * Return 0 on success or a negative error code.
460 int genl_register_family_with_ops(struct genl_family *family,
461 struct genl_ops *ops, size_t n_ops)
465 err = genl_register_family(family);
469 for (i = 0; i < n_ops; ++i, ++ops) {
470 err = genl_register_ops(family, ops);
476 genl_unregister_family(family);
479 EXPORT_SYMBOL(genl_register_family_with_ops);
482 * genl_unregister_family - unregister generic netlink family
483 * @family: generic netlink family
485 * Unregisters the specified family.
487 * Returns 0 on success or a negative error code.
489 int genl_unregister_family(struct genl_family *family)
491 struct genl_family *rc;
495 genl_unregister_mc_groups(family);
497 list_for_each_entry(rc, genl_family_chain(family->id), family_list) {
498 if (family->id != rc->id || strcmp(rc->name, family->name))
501 list_del(&rc->family_list);
502 INIT_LIST_HEAD(&family->ops_list);
505 kfree(family->attrbuf);
506 genl_ctrl_event(CTRL_CMD_DELFAMILY, family);
514 EXPORT_SYMBOL(genl_unregister_family);
517 * genlmsg_put - Add generic netlink header to netlink message
518 * @skb: socket buffer holding the message
519 * @portid: netlink portid the message is addressed to
520 * @seq: sequence number (usually the one of the sender)
521 * @family: generic netlink family
522 * @flags: netlink message flags
523 * @cmd: generic netlink command
525 * Returns pointer to user specific header
527 void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
528 struct genl_family *family, int flags, u8 cmd)
530 struct nlmsghdr *nlh;
531 struct genlmsghdr *hdr;
533 nlh = nlmsg_put(skb, portid, seq, family->id, GENL_HDRLEN +
534 family->hdrsize, flags);
538 hdr = nlmsg_data(nlh);
540 hdr->version = family->version;
543 return (char *) hdr + GENL_HDRLEN;
545 EXPORT_SYMBOL(genlmsg_put);
547 static int genl_lock_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
549 struct genl_ops *ops = cb->data;
553 rc = ops->dumpit(skb, cb);
558 static int genl_lock_done(struct netlink_callback *cb)
560 struct genl_ops *ops = cb->data;
571 static int genl_family_rcv_msg(struct genl_family *family,
573 struct nlmsghdr *nlh)
575 struct genl_ops *ops;
576 struct net *net = sock_net(skb->sk);
577 struct genl_info info;
578 struct genlmsghdr *hdr = nlmsg_data(nlh);
579 struct nlattr **attrbuf;
582 /* this family doesn't exist in this netns */
583 if (!family->netnsok && !net_eq(net, &init_net))
586 hdrlen = GENL_HDRLEN + family->hdrsize;
587 if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen))
590 ops = genl_get_cmd(hdr->cmd, family);
594 if ((ops->flags & GENL_ADMIN_PERM) &&
595 !capable(CAP_NET_ADMIN))
598 if (nlh->nlmsg_flags & NLM_F_DUMP) {
601 if (ops->dumpit == NULL)
604 if (!family->parallel_ops) {
605 struct netlink_dump_control c = {
607 .dump = genl_lock_dumpit,
608 .done = genl_lock_done,
612 rc = netlink_dump_start(net->genl_sock, skb, nlh, &c);
616 struct netlink_dump_control c = {
621 rc = netlink_dump_start(net->genl_sock, skb, nlh, &c);
627 if (ops->doit == NULL)
630 if (family->maxattr && family->parallel_ops) {
631 attrbuf = kmalloc((family->maxattr+1) *
632 sizeof(struct nlattr *), GFP_KERNEL);
636 attrbuf = family->attrbuf;
639 err = nlmsg_parse(nlh, hdrlen, attrbuf, family->maxattr,
645 info.snd_seq = nlh->nlmsg_seq;
646 info.snd_portid = NETLINK_CB(skb).portid;
648 info.genlhdr = nlmsg_data(nlh);
649 info.userhdr = nlmsg_data(nlh) + GENL_HDRLEN;
650 info.attrs = attrbuf;
651 genl_info_net_set(&info, net);
652 memset(&info.user_ptr, 0, sizeof(info.user_ptr));
654 if (family->pre_doit) {
655 err = family->pre_doit(ops, skb, &info);
660 err = ops->doit(skb, &info);
662 if (family->post_doit)
663 family->post_doit(ops, skb, &info);
666 if (family->parallel_ops)
672 static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
674 struct genl_family *family;
677 family = genl_family_find_byid(nlh->nlmsg_type);
681 if (!family->parallel_ops)
684 err = genl_family_rcv_msg(family, skb, nlh);
686 if (!family->parallel_ops)
692 static void genl_rcv(struct sk_buff *skb)
695 netlink_rcv_skb(skb, &genl_rcv_msg);
699 /**************************************************************************
701 **************************************************************************/
703 static struct genl_family genl_ctrl = {
707 .maxattr = CTRL_ATTR_MAX,
711 static int ctrl_fill_info(struct genl_family *family, u32 portid, u32 seq,
712 u32 flags, struct sk_buff *skb, u8 cmd)
716 hdr = genlmsg_put(skb, portid, seq, &genl_ctrl, flags, cmd);
720 if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) ||
721 nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id) ||
722 nla_put_u32(skb, CTRL_ATTR_VERSION, family->version) ||
723 nla_put_u32(skb, CTRL_ATTR_HDRSIZE, family->hdrsize) ||
724 nla_put_u32(skb, CTRL_ATTR_MAXATTR, family->maxattr))
725 goto nla_put_failure;
727 if (!list_empty(&family->ops_list)) {
728 struct nlattr *nla_ops;
729 struct genl_ops *ops;
732 nla_ops = nla_nest_start(skb, CTRL_ATTR_OPS);
734 goto nla_put_failure;
736 list_for_each_entry(ops, &family->ops_list, ops_list) {
739 nest = nla_nest_start(skb, idx++);
741 goto nla_put_failure;
743 if (nla_put_u32(skb, CTRL_ATTR_OP_ID, ops->cmd) ||
744 nla_put_u32(skb, CTRL_ATTR_OP_FLAGS, ops->flags))
745 goto nla_put_failure;
747 nla_nest_end(skb, nest);
750 nla_nest_end(skb, nla_ops);
753 if (!list_empty(&family->mcast_groups)) {
754 struct genl_multicast_group *grp;
755 struct nlattr *nla_grps;
758 nla_grps = nla_nest_start(skb, CTRL_ATTR_MCAST_GROUPS);
759 if (nla_grps == NULL)
760 goto nla_put_failure;
762 list_for_each_entry(grp, &family->mcast_groups, list) {
765 nest = nla_nest_start(skb, idx++);
767 goto nla_put_failure;
769 if (nla_put_u32(skb, CTRL_ATTR_MCAST_GRP_ID, grp->id) ||
770 nla_put_string(skb, CTRL_ATTR_MCAST_GRP_NAME,
772 goto nla_put_failure;
774 nla_nest_end(skb, nest);
776 nla_nest_end(skb, nla_grps);
779 return genlmsg_end(skb, hdr);
782 genlmsg_cancel(skb, hdr);
786 static int ctrl_fill_mcgrp_info(struct genl_multicast_group *grp, u32 portid,
787 u32 seq, u32 flags, struct sk_buff *skb,
791 struct nlattr *nla_grps;
794 hdr = genlmsg_put(skb, portid, seq, &genl_ctrl, flags, cmd);
798 if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, grp->family->name) ||
799 nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, grp->family->id))
800 goto nla_put_failure;
802 nla_grps = nla_nest_start(skb, CTRL_ATTR_MCAST_GROUPS);
803 if (nla_grps == NULL)
804 goto nla_put_failure;
806 nest = nla_nest_start(skb, 1);
808 goto nla_put_failure;
810 if (nla_put_u32(skb, CTRL_ATTR_MCAST_GRP_ID, grp->id) ||
811 nla_put_string(skb, CTRL_ATTR_MCAST_GRP_NAME,
813 goto nla_put_failure;
815 nla_nest_end(skb, nest);
816 nla_nest_end(skb, nla_grps);
818 return genlmsg_end(skb, hdr);
821 genlmsg_cancel(skb, hdr);
825 static int ctrl_dumpfamily(struct sk_buff *skb, struct netlink_callback *cb)
829 struct genl_family *rt;
830 struct net *net = sock_net(skb->sk);
831 int chains_to_skip = cb->args[0];
832 int fams_to_skip = cb->args[1];
834 for (i = chains_to_skip; i < GENL_FAM_TAB_SIZE; i++) {
836 list_for_each_entry(rt, genl_family_chain(i), family_list) {
837 if (!rt->netnsok && !net_eq(net, &init_net))
839 if (++n < fams_to_skip)
841 if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).portid,
842 cb->nlh->nlmsg_seq, NLM_F_MULTI,
843 skb, CTRL_CMD_NEWFAMILY) < 0)
857 static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
858 u32 portid, int seq, u8 cmd)
863 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
865 return ERR_PTR(-ENOBUFS);
867 err = ctrl_fill_info(family, portid, seq, 0, skb, cmd);
876 static struct sk_buff *ctrl_build_mcgrp_msg(struct genl_multicast_group *grp,
877 u32 portid, int seq, u8 cmd)
882 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
884 return ERR_PTR(-ENOBUFS);
886 err = ctrl_fill_mcgrp_info(grp, portid, seq, 0, skb, cmd);
895 static const struct nla_policy ctrl_policy[CTRL_ATTR_MAX+1] = {
896 [CTRL_ATTR_FAMILY_ID] = { .type = NLA_U16 },
897 [CTRL_ATTR_FAMILY_NAME] = { .type = NLA_NUL_STRING,
898 .len = GENL_NAMSIZ - 1 },
901 static int ctrl_getfamily(struct sk_buff *skb, struct genl_info *info)
904 struct genl_family *res = NULL;
907 if (info->attrs[CTRL_ATTR_FAMILY_ID]) {
908 u16 id = nla_get_u16(info->attrs[CTRL_ATTR_FAMILY_ID]);
909 res = genl_family_find_byid(id);
913 if (info->attrs[CTRL_ATTR_FAMILY_NAME]) {
916 name = nla_data(info->attrs[CTRL_ATTR_FAMILY_NAME]);
917 res = genl_family_find_byname(name);
918 #ifdef CONFIG_MODULES
922 request_module("net-pf-%d-proto-%d-family-%s",
923 PF_NETLINK, NETLINK_GENERIC, name);
926 res = genl_family_find_byname(name);
935 if (!res->netnsok && !net_eq(genl_info_net(info), &init_net)) {
936 /* family doesn't exist here */
940 msg = ctrl_build_family_msg(res, info->snd_portid, info->snd_seq,
945 return genlmsg_reply(msg, info);
948 static int genl_ctrl_event(int event, void *data)
951 struct genl_family *family;
952 struct genl_multicast_group *grp;
954 /* genl is still initialising */
955 if (!init_net.genl_sock)
959 case CTRL_CMD_NEWFAMILY:
960 case CTRL_CMD_DELFAMILY:
962 msg = ctrl_build_family_msg(family, 0, 0, event);
964 case CTRL_CMD_NEWMCAST_GRP:
965 case CTRL_CMD_DELMCAST_GRP:
967 family = grp->family;
968 msg = ctrl_build_mcgrp_msg(data, 0, 0, event);
977 if (!family->netnsok) {
978 genlmsg_multicast_netns(&init_net, msg, 0,
979 GENL_ID_CTRL, GFP_KERNEL);
982 genlmsg_multicast_allns(msg, 0, GENL_ID_CTRL, GFP_ATOMIC);
989 static struct genl_ops genl_ctrl_ops = {
990 .cmd = CTRL_CMD_GETFAMILY,
991 .doit = ctrl_getfamily,
992 .dumpit = ctrl_dumpfamily,
993 .policy = ctrl_policy,
996 static struct genl_multicast_group notify_grp = {
1000 static int __net_init genl_pernet_init(struct net *net)
1002 struct netlink_kernel_cfg cfg = {
1004 .flags = NL_CFG_F_NONROOT_RECV,
1007 /* we'll bump the group number right afterwards */
1008 net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, &cfg);
1010 if (!net->genl_sock && net_eq(net, &init_net))
1011 panic("GENL: Cannot initialize generic netlink\n");
1013 if (!net->genl_sock)
1019 static void __net_exit genl_pernet_exit(struct net *net)
1021 netlink_kernel_release(net->genl_sock);
1022 net->genl_sock = NULL;
1025 static struct pernet_operations genl_pernet_ops = {
1026 .init = genl_pernet_init,
1027 .exit = genl_pernet_exit,
1030 static int __init genl_init(void)
1034 for (i = 0; i < GENL_FAM_TAB_SIZE; i++)
1035 INIT_LIST_HEAD(&family_ht[i]);
1037 err = genl_register_family_with_ops(&genl_ctrl, &genl_ctrl_ops, 1);
1041 err = register_pernet_subsys(&genl_pernet_ops);
1045 err = genl_register_mc_group(&genl_ctrl, ¬ify_grp);
1052 panic("GENL: Cannot register controller: %d\n", err);
1055 subsys_initcall(genl_init);
1057 static int genlmsg_mcast(struct sk_buff *skb, u32 portid, unsigned long group,
1060 struct sk_buff *tmp;
1061 struct net *net, *prev = NULL;
1064 for_each_net_rcu(net) {
1066 tmp = skb_clone(skb, flags);
1071 err = nlmsg_multicast(prev->genl_sock, tmp,
1072 portid, group, flags);
1080 return nlmsg_multicast(prev->genl_sock, skb, portid, group, flags);
1086 int genlmsg_multicast_allns(struct sk_buff *skb, u32 portid, unsigned int group,
1089 return genlmsg_mcast(skb, portid, group, flags);
1091 EXPORT_SYMBOL(genlmsg_multicast_allns);
1093 void genl_notify(struct sk_buff *skb, struct net *net, u32 portid, u32 group,
1094 struct nlmsghdr *nlh, gfp_t flags)
1096 struct sock *sk = net->genl_sock;
1100 report = nlmsg_report(nlh);
1102 nlmsg_notify(sk, skb, portid, group, report, flags);
1104 EXPORT_SYMBOL(genl_notify);