Lines Matching +full:c +full:- +full:family +full:- +full:name
1 // SPDX-License-Identifier: GPL-2.0
3 * NETLINK Generic Netlink Family
55 static void genl_op_lock(const struct genl_family *family) in genl_op_lock() argument
57 if (!family->parallel_ops) in genl_op_lock()
61 static void genl_op_unlock(const struct genl_family *family) in genl_op_unlock() argument
63 if (!family->parallel_ops) in genl_op_unlock()
75 * Bit 1 is marked as already used since the drop-monitor code
80 * and the code no longer marks pre-reserved IDs as used.
82 * also abused this API and relied on family == group ID, we
83 * cater to that by giving it a static family and group ID.
93 /* We need the last attribute with non-zero ID therefore a 2-entry array */
99 static int genl_ctrl_event(int event, const struct genl_family *family,
104 genl_op_fill_in_reject_policy(const struct genl_family *family, in genl_op_fill_in_reject_policy() argument
107 BUILD_BUG_ON(ARRAY_SIZE(genl_policy_reject_all) - 1 != 1); in genl_op_fill_in_reject_policy()
109 if (op->policy || op->cmd < family->resv_start_op) in genl_op_fill_in_reject_policy()
112 op->policy = genl_policy_reject_all; in genl_op_fill_in_reject_policy()
113 op->maxattr = 1; in genl_op_fill_in_reject_policy()
117 genl_op_fill_in_reject_policy_split(const struct genl_family *family, in genl_op_fill_in_reject_policy_split() argument
120 if (op->policy) in genl_op_fill_in_reject_policy_split()
123 op->policy = genl_policy_reject_all; in genl_op_fill_in_reject_policy_split()
124 op->maxattr = 1; in genl_op_fill_in_reject_policy_split()
132 static const struct genl_family *genl_family_find_byname(char *name) in genl_family_find_byname() argument
134 const struct genl_family *family; in genl_family_find_byname() local
137 idr_for_each_entry(&genl_fam_idr, family, id) in genl_family_find_byname()
138 if (strcmp(family->name, name) == 0) in genl_family_find_byname()
139 return family; in genl_family_find_byname()
145 const struct genl_family *family; member
154 static void genl_op_from_full(const struct genl_family *family, in genl_op_from_full() argument
157 *op = family->ops[i]; in genl_op_from_full()
159 if (!op->maxattr) in genl_op_from_full()
160 op->maxattr = family->maxattr; in genl_op_from_full()
161 if (!op->policy) in genl_op_from_full()
162 op->policy = family->policy; in genl_op_from_full()
164 genl_op_fill_in_reject_policy(family, op); in genl_op_from_full()
167 static int genl_get_cmd_full(u32 cmd, const struct genl_family *family, in genl_get_cmd_full() argument
172 for (i = 0; i < family->n_ops; i++) in genl_get_cmd_full()
173 if (family->ops[i].cmd == cmd) { in genl_get_cmd_full()
174 genl_op_from_full(family, i, op); in genl_get_cmd_full()
178 return -ENOENT; in genl_get_cmd_full()
181 static void genl_op_from_small(const struct genl_family *family, in genl_op_from_small() argument
185 op->doit = family->small_ops[i].doit; in genl_op_from_small()
186 op->dumpit = family->small_ops[i].dumpit; in genl_op_from_small()
187 op->cmd = family->small_ops[i].cmd; in genl_op_from_small()
188 op->internal_flags = family->small_ops[i].internal_flags; in genl_op_from_small()
189 op->flags = family->small_ops[i].flags; in genl_op_from_small()
190 op->validate = family->small_ops[i].validate; in genl_op_from_small()
192 op->maxattr = family->maxattr; in genl_op_from_small()
193 op->policy = family->policy; in genl_op_from_small()
195 genl_op_fill_in_reject_policy(family, op); in genl_op_from_small()
198 static int genl_get_cmd_small(u32 cmd, const struct genl_family *family, in genl_get_cmd_small() argument
203 for (i = 0; i < family->n_small_ops; i++) in genl_get_cmd_small()
204 if (family->small_ops[i].cmd == cmd) { in genl_get_cmd_small()
205 genl_op_from_small(family, i, op); in genl_get_cmd_small()
209 return -ENOENT; in genl_get_cmd_small()
214 const struct genl_family *family = iter->family; in genl_op_from_split() local
217 i = iter->entry_idx - family->n_ops - family->n_small_ops; in genl_op_from_split()
219 if (family->split_ops[i + cnt].flags & GENL_CMD_CAP_DO) { in genl_op_from_split()
220 iter->doit = family->split_ops[i + cnt]; in genl_op_from_split()
221 genl_op_fill_in_reject_policy_split(family, &iter->doit); in genl_op_from_split()
224 memset(&iter->doit, 0, sizeof(iter->doit)); in genl_op_from_split()
227 if (i + cnt < family->n_split_ops && in genl_op_from_split()
228 family->split_ops[i + cnt].flags & GENL_CMD_CAP_DUMP) { in genl_op_from_split()
229 iter->dumpit = family->split_ops[i + cnt]; in genl_op_from_split()
230 genl_op_fill_in_reject_policy_split(family, &iter->dumpit); in genl_op_from_split()
233 memset(&iter->dumpit, 0, sizeof(iter->dumpit)); in genl_op_from_split()
237 iter->entry_idx += cnt; in genl_op_from_split()
241 genl_get_cmd_split(u32 cmd, u8 flag, const struct genl_family *family, in genl_get_cmd_split() argument
246 for (i = 0; i < family->n_split_ops; i++) in genl_get_cmd_split()
247 if (family->split_ops[i].cmd == cmd && in genl_get_cmd_split()
248 family->split_ops[i].flags & flag) { in genl_get_cmd_split()
249 *op = family->split_ops[i]; in genl_get_cmd_split()
253 return -ENOENT; in genl_get_cmd_split()
258 const struct genl_family *family, in genl_cmd_full_to_split() argument
261 if ((flags & GENL_CMD_CAP_DO && !full->doit) || in genl_cmd_full_to_split()
262 (flags & GENL_CMD_CAP_DUMP && !full->dumpit)) { in genl_cmd_full_to_split()
264 return -ENOENT; in genl_cmd_full_to_split()
268 op->start = full->start; in genl_cmd_full_to_split()
269 op->dumpit = full->dumpit; in genl_cmd_full_to_split()
270 op->done = full->done; in genl_cmd_full_to_split()
272 op->pre_doit = family->pre_doit; in genl_cmd_full_to_split()
273 op->doit = full->doit; in genl_cmd_full_to_split()
274 op->post_doit = family->post_doit; in genl_cmd_full_to_split()
278 full->validate & GENL_DONT_VALIDATE_DUMP) { in genl_cmd_full_to_split()
279 op->policy = NULL; in genl_cmd_full_to_split()
280 op->maxattr = 0; in genl_cmd_full_to_split()
282 op->policy = full->policy; in genl_cmd_full_to_split()
283 op->maxattr = full->maxattr; in genl_cmd_full_to_split()
286 op->cmd = full->cmd; in genl_cmd_full_to_split()
287 op->internal_flags = full->internal_flags; in genl_cmd_full_to_split()
288 op->flags = full->flags; in genl_cmd_full_to_split()
289 op->validate = full->validate; in genl_cmd_full_to_split()
292 op->flags |= flags; in genl_cmd_full_to_split()
299 genl_get_cmd(u32 cmd, u8 flags, const struct genl_family *family, in genl_get_cmd() argument
305 err = genl_get_cmd_full(cmd, family, &full); in genl_get_cmd()
306 if (err == -ENOENT) in genl_get_cmd()
307 err = genl_get_cmd_small(cmd, family, &full); in genl_get_cmd()
310 return genl_cmd_full_to_split(op, family, &full, flags); in genl_get_cmd()
312 err = genl_get_cmd_split(cmd, flags, family, op); in genl_get_cmd()
319 * Fail if both are missing, genl_get_cmd() will zero-init in case of failure.
322 genl_get_cmd_both(u32 cmd, const struct genl_family *family, in genl_get_cmd_both() argument
327 err1 = genl_get_cmd(cmd, GENL_CMD_CAP_DO, family, doit); in genl_get_cmd_both()
328 err2 = genl_get_cmd(cmd, GENL_CMD_CAP_DUMP, family, dumpit); in genl_get_cmd_both()
330 return err1 && err2 ? -ENOENT : 0; in genl_get_cmd_both()
334 genl_op_iter_init(const struct genl_family *family, struct genl_op_iter *iter) in genl_op_iter_init() argument
336 iter->family = family; in genl_op_iter_init()
337 iter->cmd_idx = 0; in genl_op_iter_init()
338 iter->entry_idx = 0; in genl_op_iter_init()
340 iter->flags = 0; in genl_op_iter_init()
342 return iter->family->n_ops + in genl_op_iter_init()
343 iter->family->n_small_ops + in genl_op_iter_init()
344 iter->family->n_split_ops; in genl_op_iter_init()
349 const struct genl_family *family = iter->family; in genl_op_iter_next() local
353 if (iter->entry_idx < family->n_ops) { in genl_op_iter_next()
354 genl_op_from_full(family, iter->entry_idx, &op); in genl_op_iter_next()
355 } else if (iter->entry_idx < family->n_ops + family->n_small_ops) { in genl_op_iter_next()
356 genl_op_from_small(family, iter->entry_idx - family->n_ops, in genl_op_iter_next()
358 } else if (iter->entry_idx < in genl_op_iter_next()
359 family->n_ops + family->n_small_ops + family->n_split_ops) { in genl_op_iter_next()
367 iter->cmd_idx++; in genl_op_iter_next()
370 iter->entry_idx++; in genl_op_iter_next()
372 genl_cmd_full_to_split(&iter->doit, family, in genl_op_iter_next()
374 genl_cmd_full_to_split(&iter->dumpit, family, in genl_op_iter_next()
378 iter->cmd = iter->doit.cmd | iter->dumpit.cmd; in genl_op_iter_next()
379 iter->flags = iter->doit.flags | iter->dumpit.flags; in genl_op_iter_next()
392 return iter->cmd_idx; in genl_op_iter_idx()
433 return -ENOMEM; in genl_allocate_reserve_groups()
440 return -ENOMEM; in genl_allocate_reserve_groups()
457 static int genl_validate_assign_mc_groups(struct genl_family *family) in genl_validate_assign_mc_groups() argument
460 int n_groups = family->n_mcgrps; in genl_validate_assign_mc_groups()
468 const struct genl_multicast_group *grp = &family->mcgrps[i]; in genl_validate_assign_mc_groups()
470 if (WARN_ON(grp->name[0] == '\0')) in genl_validate_assign_mc_groups()
471 return -EINVAL; in genl_validate_assign_mc_groups()
472 if (WARN_ON(!string_is_terminated(grp->name, GENL_NAMSIZ))) in genl_validate_assign_mc_groups()
473 return -EINVAL; in genl_validate_assign_mc_groups()
476 /* special-case our own group and hacks */ in genl_validate_assign_mc_groups()
477 if (family == &genl_ctrl) { in genl_validate_assign_mc_groups()
480 } else if (strcmp(family->name, "NET_DM") == 0) { in genl_validate_assign_mc_groups()
483 } else if (family->id == GENL_ID_VFS_DQUOT) { in genl_validate_assign_mc_groups()
486 } else if (family->id == GENL_ID_PMCRAID) { in genl_validate_assign_mc_groups()
496 family->mcgrp_offset = first_id; in genl_validate_assign_mc_groups()
502 if (family->netnsok) { in genl_validate_assign_mc_groups()
508 err = __netlink_change_ngroups(net->genl_sock, in genl_validate_assign_mc_groups()
528 for (i = 0; i < family->n_mcgrps; i++) in genl_validate_assign_mc_groups()
529 clear_bit(family->mcgrp_offset + i, mc_groups); in genl_validate_assign_mc_groups()
535 static void genl_unregister_mc_groups(const struct genl_family *family) in genl_unregister_mc_groups() argument
543 for (i = 0; i < family->n_mcgrps; i++) in genl_unregister_mc_groups()
545 net->genl_sock, family->mcgrp_offset + i); in genl_unregister_mc_groups()
550 for (i = 0; i < family->n_mcgrps; i++) { in genl_unregister_mc_groups()
551 int grp_id = family->mcgrp_offset + i; in genl_unregister_mc_groups()
555 genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, family, in genl_unregister_mc_groups()
556 &family->mcgrps[i], grp_id); in genl_unregister_mc_groups()
562 if (WARN_ON(hweight8(op->flags & (GENL_CMD_CAP_DO | in genl_split_op_check()
568 static int genl_validate_ops(const struct genl_family *family) in genl_validate_ops() argument
573 if (WARN_ON(family->n_ops && !family->ops) || in genl_validate_ops()
574 WARN_ON(family->n_small_ops && !family->small_ops) || in genl_validate_ops()
575 WARN_ON(family->n_split_ops && !family->split_ops)) in genl_validate_ops()
576 return -EINVAL; in genl_validate_ops()
578 for (genl_op_iter_init(family, &i); genl_op_iter_next(&i); ) { in genl_validate_ops()
580 return -EINVAL; in genl_validate_ops()
582 if (WARN_ON(i.cmd >= family->resv_start_op && in genl_validate_ops()
584 return -EINVAL; in genl_validate_ops()
589 return -EINVAL; in genl_validate_ops()
593 if (family->n_split_ops) { in genl_validate_ops()
594 if (genl_split_op_check(&family->split_ops[0])) in genl_validate_ops()
595 return -EINVAL; in genl_validate_ops()
598 for (s = 1; s < family->n_split_ops; s++) { in genl_validate_ops()
601 a = &family->split_ops[s - 1]; in genl_validate_ops()
602 b = &family->split_ops[s]; in genl_validate_ops()
605 return -EINVAL; in genl_validate_ops()
608 if (a->cmd < b->cmd) { in genl_validate_ops()
610 } else if (a->cmd > b->cmd) { in genl_validate_ops()
612 return -EINVAL; in genl_validate_ops()
615 if (a->internal_flags != b->internal_flags || in genl_validate_ops()
616 ((a->flags ^ b->flags) & ~(GENL_CMD_CAP_DO | in genl_validate_ops()
619 return -EINVAL; in genl_validate_ops()
622 if ((a->flags & GENL_CMD_CAP_DO) && in genl_validate_ops()
623 (b->flags & GENL_CMD_CAP_DUMP)) in genl_validate_ops()
627 return -EINVAL; in genl_validate_ops()
634 * genl_register_family - register a generic netlink family
635 * @family: generic netlink family
637 * Registers the specified family after validating it first. Only one
638 * family may be registered with the same family name or identifier.
640 * The family's ops, multicast groups and module pointer must already
645 int genl_register_family(struct genl_family *family) in genl_register_family() argument
650 err = genl_validate_ops(family); in genl_register_family()
656 if (genl_family_find_byname(family->name)) { in genl_register_family()
657 err = -EEXIST; in genl_register_family()
662 * Sadly, a few cases need to be special-cased in genl_register_family()
664 * and having used their family ID also as their in genl_register_family()
668 if (family == &genl_ctrl) { in genl_register_family()
669 /* and this needs to be special for initial family lookups */ in genl_register_family()
671 } else if (strcmp(family->name, "pmcraid") == 0) { in genl_register_family()
673 } else if (strcmp(family->name, "VFS_DQUOT") == 0) { in genl_register_family()
677 family->id = idr_alloc_cyclic(&genl_fam_idr, family, in genl_register_family()
679 if (family->id < 0) { in genl_register_family()
680 err = family->id; in genl_register_family()
684 err = genl_validate_assign_mc_groups(family); in genl_register_family()
691 genl_ctrl_event(CTRL_CMD_NEWFAMILY, family, NULL, 0); in genl_register_family()
692 for (i = 0; i < family->n_mcgrps; i++) in genl_register_family()
693 genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, family, in genl_register_family()
694 &family->mcgrps[i], family->mcgrp_offset + i); in genl_register_family()
699 idr_remove(&genl_fam_idr, family->id); in genl_register_family()
707 * genl_unregister_family - unregister generic netlink family
708 * @family: generic netlink family
710 * Unregisters the specified family.
714 int genl_unregister_family(const struct genl_family *family) in genl_unregister_family() argument
718 if (!genl_family_find_byid(family->id)) { in genl_unregister_family()
720 return -ENOENT; in genl_unregister_family()
723 genl_unregister_mc_groups(family); in genl_unregister_family()
725 idr_remove(&genl_fam_idr, family->id); in genl_unregister_family()
732 genl_ctrl_event(CTRL_CMD_DELFAMILY, family, NULL, 0); in genl_unregister_family()
739 * genlmsg_put - Add generic netlink header to netlink message
743 * @family: generic netlink family
750 const struct genl_family *family, int flags, u8 cmd) in genlmsg_put() argument
755 nlh = nlmsg_put(skb, portid, seq, family->id, GENL_HDRLEN + in genlmsg_put()
756 family->hdrsize, flags); in genlmsg_put()
761 hdr->cmd = cmd; in genlmsg_put()
762 hdr->version = family->version; in genlmsg_put()
763 hdr->reserved = 0; in genlmsg_put()
780 genl_family_rcv_msg_attrs_parse(const struct genl_family *family, in genl_family_rcv_msg_attrs_parse() argument
787 enum netlink_validation validate = ops->validate & no_strict_flag ? in genl_family_rcv_msg_attrs_parse()
793 if (!ops->maxattr) in genl_family_rcv_msg_attrs_parse()
796 attrbuf = kmalloc_array(ops->maxattr + 1, in genl_family_rcv_msg_attrs_parse()
799 return ERR_PTR(-ENOMEM); in genl_family_rcv_msg_attrs_parse()
801 err = __nlmsg_parse(nlh, hdrlen, attrbuf, ops->maxattr, ops->policy, in genl_family_rcv_msg_attrs_parse()
816 const struct genl_family *family; member
825 struct genl_start_context *ctx = cb->data; in genl_start()
831 ops = ctx->ops; in genl_start()
832 if (!(ops->validate & GENL_DONT_VALIDATE_DUMP) && in genl_start()
833 ctx->nlh->nlmsg_len < nlmsg_msg_size(ctx->hdrlen)) in genl_start()
834 return -EINVAL; in genl_start()
836 attrs = genl_family_rcv_msg_attrs_parse(ctx->family, ctx->nlh, ctx->extack, in genl_start()
837 ops, ctx->hdrlen, in genl_start()
845 return -ENOMEM; in genl_start()
847 info->op = *ops; in genl_start()
848 info->info.family = ctx->family; in genl_start()
849 info->info.snd_seq = cb->nlh->nlmsg_seq; in genl_start()
850 info->info.snd_portid = NETLINK_CB(cb->skb).portid; in genl_start()
851 info->info.nlhdr = cb->nlh; in genl_start()
852 info->info.genlhdr = nlmsg_data(cb->nlh); in genl_start()
853 info->info.attrs = attrs; in genl_start()
854 genl_info_net_set(&info->info, sock_net(cb->skb->sk)); in genl_start()
855 info->info.extack = cb->extack; in genl_start()
856 memset(&info->info.user_ptr, 0, sizeof(info->info.user_ptr)); in genl_start()
858 cb->data = info; in genl_start()
859 if (ops->start) { in genl_start()
860 genl_op_lock(ctx->family); in genl_start()
861 rc = ops->start(cb); in genl_start()
862 genl_op_unlock(ctx->family); in genl_start()
866 genl_family_rcv_msg_attrs_free(info->info.attrs); in genl_start()
868 cb->data = NULL; in genl_start()
875 struct genl_dumpit_info *dump_info = cb->data; in genl_dumpit()
876 const struct genl_split_ops *ops = &dump_info->op; in genl_dumpit()
877 struct genl_info *info = &dump_info->info; in genl_dumpit()
880 info->extack = cb->extack; in genl_dumpit()
882 genl_op_lock(info->family); in genl_dumpit()
883 rc = ops->dumpit(skb, cb); in genl_dumpit()
884 genl_op_unlock(info->family); in genl_dumpit()
890 struct genl_dumpit_info *dump_info = cb->data; in genl_done()
891 const struct genl_split_ops *ops = &dump_info->op; in genl_done()
892 struct genl_info *info = &dump_info->info; in genl_done()
895 info->extack = cb->extack; in genl_done()
897 if (ops->done) { in genl_done()
898 genl_op_lock(info->family); in genl_done()
899 rc = ops->done(cb); in genl_done()
900 genl_op_unlock(info->family); in genl_done()
902 genl_family_rcv_msg_attrs_free(info->attrs); in genl_done()
907 static int genl_family_rcv_msg_dumpit(const struct genl_family *family, in genl_family_rcv_msg_dumpit() argument
915 struct netlink_dump_control c = { in genl_family_rcv_msg_dumpit() local
916 .module = family->module, in genl_family_rcv_msg_dumpit()
925 ctx.family = family; in genl_family_rcv_msg_dumpit()
931 genl_op_unlock(family); in genl_family_rcv_msg_dumpit()
932 err = __netlink_dump_start(net->genl_sock, skb, nlh, &c); in genl_family_rcv_msg_dumpit()
933 genl_op_lock(family); in genl_family_rcv_msg_dumpit()
938 static int genl_family_rcv_msg_doit(const struct genl_family *family, in genl_family_rcv_msg_doit() argument
949 attrbuf = genl_family_rcv_msg_attrs_parse(family, nlh, extack, in genl_family_rcv_msg_doit()
955 info.snd_seq = nlh->nlmsg_seq; in genl_family_rcv_msg_doit()
957 info.family = family; in genl_family_rcv_msg_doit()
965 if (ops->pre_doit) { in genl_family_rcv_msg_doit()
966 err = ops->pre_doit(ops, skb, &info); in genl_family_rcv_msg_doit()
971 err = ops->doit(skb, &info); in genl_family_rcv_msg_doit()
973 if (ops->post_doit) in genl_family_rcv_msg_doit()
974 ops->post_doit(ops, skb, &info); in genl_family_rcv_msg_doit()
982 static int genl_header_check(const struct genl_family *family, in genl_header_check() argument
989 if (hdr->cmd < family->resv_start_op) in genl_header_check()
992 if (hdr->reserved) { in genl_header_check()
994 return -EINVAL; in genl_header_check()
1000 flags = nlh->nlmsg_flags; in genl_header_check()
1006 return -EINVAL; in genl_header_check()
1012 static int genl_family_rcv_msg(const struct genl_family *family, in genl_family_rcv_msg() argument
1017 struct net *net = sock_net(skb->sk); in genl_family_rcv_msg()
1023 /* this family doesn't exist in this netns */ in genl_family_rcv_msg()
1024 if (!family->netnsok && !net_eq(net, &init_net)) in genl_family_rcv_msg()
1025 return -ENOENT; in genl_family_rcv_msg()
1027 hdrlen = GENL_HDRLEN + family->hdrsize; in genl_family_rcv_msg()
1028 if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) in genl_family_rcv_msg()
1029 return -EINVAL; in genl_family_rcv_msg()
1031 if (genl_header_check(family, nlh, hdr, extack)) in genl_family_rcv_msg()
1032 return -EINVAL; in genl_family_rcv_msg()
1034 flags = (nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP ? in genl_family_rcv_msg()
1036 if (genl_get_cmd(hdr->cmd, flags, family, &op)) in genl_family_rcv_msg()
1037 return -EOPNOTSUPP; in genl_family_rcv_msg()
1041 return -EPERM; in genl_family_rcv_msg()
1044 !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) in genl_family_rcv_msg()
1045 return -EPERM; in genl_family_rcv_msg()
1048 return genl_family_rcv_msg_dumpit(family, skb, nlh, extack, in genl_family_rcv_msg()
1051 return genl_family_rcv_msg_doit(family, skb, nlh, extack, in genl_family_rcv_msg()
1058 const struct genl_family *family; in genl_rcv_msg() local
1061 family = genl_family_find_byid(nlh->nlmsg_type); in genl_rcv_msg()
1062 if (family == NULL) in genl_rcv_msg()
1063 return -ENOENT; in genl_rcv_msg()
1065 genl_op_lock(family); in genl_rcv_msg()
1066 err = genl_family_rcv_msg(family, skb, nlh, extack); in genl_rcv_msg()
1067 genl_op_unlock(family); in genl_rcv_msg()
1085 static int ctrl_fill_info(const struct genl_family *family, u32 portid, u32 seq, in ctrl_fill_info() argument
1093 return -1; in ctrl_fill_info()
1095 if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) || in ctrl_fill_info()
1096 nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id) || in ctrl_fill_info()
1097 nla_put_u32(skb, CTRL_ATTR_VERSION, family->version) || in ctrl_fill_info()
1098 nla_put_u32(skb, CTRL_ATTR_HDRSIZE, family->hdrsize) || in ctrl_fill_info()
1099 nla_put_u32(skb, CTRL_ATTR_MAXATTR, family->maxattr)) in ctrl_fill_info()
1102 if (genl_op_iter_init(family, &i)) { in ctrl_fill_info()
1131 if (family->n_mcgrps) { in ctrl_fill_info()
1139 for (i = 0; i < family->n_mcgrps; i++) { in ctrl_fill_info()
1143 grp = &family->mcgrps[i]; in ctrl_fill_info()
1150 family->mcgrp_offset + i) || in ctrl_fill_info()
1152 grp->name)) in ctrl_fill_info()
1165 return -EMSGSIZE; in ctrl_fill_info()
1168 static int ctrl_fill_mcgrp_info(const struct genl_family *family, in ctrl_fill_mcgrp_info() argument
1179 return -1; in ctrl_fill_mcgrp_info()
1181 if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) || in ctrl_fill_mcgrp_info()
1182 nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id)) in ctrl_fill_mcgrp_info()
1195 grp->name)) in ctrl_fill_mcgrp_info()
1206 return -EMSGSIZE; in ctrl_fill_mcgrp_info()
1213 struct net *net = sock_net(skb->sk); in ctrl_dumpfamily()
1214 int fams_to_skip = cb->args[0]; in ctrl_dumpfamily()
1218 if (!rt->netnsok && !net_eq(net, &init_net)) in ctrl_dumpfamily()
1224 if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).portid, in ctrl_dumpfamily()
1225 cb->nlh->nlmsg_seq, NLM_F_MULTI, in ctrl_dumpfamily()
1227 n--; in ctrl_dumpfamily()
1232 cb->args[0] = n; in ctrl_dumpfamily()
1233 return skb->len; in ctrl_dumpfamily()
1236 static struct sk_buff *ctrl_build_family_msg(const struct genl_family *family, in ctrl_build_family_msg() argument
1244 return ERR_PTR(-ENOBUFS); in ctrl_build_family_msg()
1246 err = ctrl_fill_info(family, portid, seq, 0, skb, cmd); in ctrl_build_family_msg()
1256 ctrl_build_mcgrp_msg(const struct genl_family *family, in ctrl_build_mcgrp_msg() argument
1265 return ERR_PTR(-ENOBUFS); in ctrl_build_mcgrp_msg()
1267 err = ctrl_fill_mcgrp_info(family, grp, grp_id, portid, in ctrl_build_mcgrp_msg()
1280 .len = GENL_NAMSIZ - 1 },
1287 int err = -EINVAL; in ctrl_getfamily()
1289 if (info->attrs[CTRL_ATTR_FAMILY_ID]) { in ctrl_getfamily()
1290 u16 id = nla_get_u16(info->attrs[CTRL_ATTR_FAMILY_ID]); in ctrl_getfamily()
1292 err = -ENOENT; in ctrl_getfamily()
1295 if (info->attrs[CTRL_ATTR_FAMILY_NAME]) { in ctrl_getfamily()
1296 char *name; in ctrl_getfamily() local
1298 name = nla_data(info->attrs[CTRL_ATTR_FAMILY_NAME]); in ctrl_getfamily()
1299 res = genl_family_find_byname(name); in ctrl_getfamily()
1304 request_module("net-pf-%d-proto-%d-family-%s", in ctrl_getfamily()
1305 PF_NETLINK, NETLINK_GENERIC, name); in ctrl_getfamily()
1308 res = genl_family_find_byname(name); in ctrl_getfamily()
1311 err = -ENOENT; in ctrl_getfamily()
1317 if (!res->netnsok && !net_eq(genl_info_net(info), &init_net)) { in ctrl_getfamily()
1318 /* family doesn't exist here */ in ctrl_getfamily()
1319 return -ENOENT; in ctrl_getfamily()
1322 msg = ctrl_build_family_msg(res, info->snd_portid, info->snd_seq, in ctrl_getfamily()
1330 static int genl_ctrl_event(int event, const struct genl_family *family, in genl_ctrl_event() argument
1344 msg = ctrl_build_family_msg(family, 0, 0, event); in genl_ctrl_event()
1349 msg = ctrl_build_mcgrp_msg(family, grp, grp_id, 0, 0, event); in genl_ctrl_event()
1352 return -EINVAL; in genl_ctrl_event()
1358 if (!family->netnsok) { in genl_ctrl_event()
1384 .len = GENL_NAMSIZ - 1 },
1391 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_start()
1392 struct nlattr **tb = info->info.attrs; in ctrl_dumppolicy_start()
1397 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); in ctrl_dumppolicy_start()
1400 return -EINVAL; in ctrl_dumppolicy_start()
1403 ctx->fam_id = nla_get_u16(tb[CTRL_ATTR_FAMILY_ID]); in ctrl_dumppolicy_start()
1408 return -ENOENT; in ctrl_dumppolicy_start()
1409 ctx->fam_id = rt->id; in ctrl_dumppolicy_start()
1412 rt = genl_family_find_byid(ctx->fam_id); in ctrl_dumppolicy_start()
1414 return -ENOENT; in ctrl_dumppolicy_start()
1416 ctx->rt = rt; in ctrl_dumppolicy_start()
1421 ctx->single_op = true; in ctrl_dumppolicy_start()
1422 ctx->op = nla_get_u32(tb[CTRL_ATTR_OP]); in ctrl_dumppolicy_start()
1424 err = genl_get_cmd_both(ctx->op, rt, &doit, &dump); in ctrl_dumppolicy_start()
1426 NL_SET_BAD_ATTR(cb->extack, tb[CTRL_ATTR_OP]); in ctrl_dumppolicy_start()
1431 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1438 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1445 if (!ctx->state) in ctrl_dumppolicy_start()
1446 return -ENODATA; in ctrl_dumppolicy_start()
1448 ctx->dump_map = 1; in ctrl_dumppolicy_start()
1452 ctx->op_iter = kmalloc(sizeof(*ctx->op_iter), GFP_KERNEL); in ctrl_dumppolicy_start()
1453 if (!ctx->op_iter) in ctrl_dumppolicy_start()
1454 return -ENOMEM; in ctrl_dumppolicy_start()
1456 genl_op_iter_init(rt, ctx->op_iter); in ctrl_dumppolicy_start()
1457 ctx->dump_map = genl_op_iter_next(ctx->op_iter); in ctrl_dumppolicy_start()
1461 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1468 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1476 if (!ctx->state) { in ctrl_dumppolicy_start()
1477 err = -ENODATA; in ctrl_dumppolicy_start()
1483 netlink_policy_dump_free(ctx->state); in ctrl_dumppolicy_start()
1485 kfree(ctx->op_iter); in ctrl_dumppolicy_start()
1492 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_prep()
1495 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, in ctrl_dumppolicy_prep()
1496 cb->nlh->nlmsg_seq, &genl_ctrl, in ctrl_dumppolicy_prep()
1501 if (nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, ctx->fam_id)) in ctrl_dumppolicy_prep()
1512 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_put_op()
1518 if (!doit->policy && !dumpit->policy) in ctrl_dumppolicy_put_op()
1523 return -ENOBUFS; in ctrl_dumppolicy_put_op()
1529 nest_op = nla_nest_start(skb, doit->cmd); in ctrl_dumppolicy_put_op()
1533 if (doit->policy) { in ctrl_dumppolicy_put_op()
1534 idx = netlink_policy_dump_get_policy_idx(ctx->state, in ctrl_dumppolicy_put_op()
1535 doit->policy, in ctrl_dumppolicy_put_op()
1536 doit->maxattr); in ctrl_dumppolicy_put_op()
1541 if (dumpit->policy) { in ctrl_dumppolicy_put_op()
1542 idx = netlink_policy_dump_get_policy_idx(ctx->state, in ctrl_dumppolicy_put_op()
1543 dumpit->policy, in ctrl_dumppolicy_put_op()
1544 dumpit->maxattr); in ctrl_dumppolicy_put_op()
1557 return -ENOBUFS; in ctrl_dumppolicy_put_op()
1562 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy()
1565 if (ctx->dump_map) { in ctrl_dumppolicy()
1566 if (ctx->single_op) { in ctrl_dumppolicy()
1569 if (WARN_ON(genl_get_cmd_both(ctx->op, ctx->rt, in ctrl_dumppolicy()
1571 return -ENOENT; in ctrl_dumppolicy()
1574 return skb->len; in ctrl_dumppolicy()
1576 /* done with the per-op policy index list */ in ctrl_dumppolicy()
1577 ctx->dump_map = 0; in ctrl_dumppolicy()
1580 while (ctx->dump_map) { in ctrl_dumppolicy()
1582 &ctx->op_iter->doit, in ctrl_dumppolicy()
1583 &ctx->op_iter->dumpit)) in ctrl_dumppolicy()
1584 return skb->len; in ctrl_dumppolicy()
1586 ctx->dump_map = genl_op_iter_next(ctx->op_iter); in ctrl_dumppolicy()
1590 while (netlink_policy_dump_loop(ctx->state)) { in ctrl_dumppolicy()
1601 if (netlink_policy_dump_write(skb, ctx->state)) in ctrl_dumppolicy()
1609 return skb->len; in ctrl_dumppolicy()
1613 return skb->len; in ctrl_dumppolicy()
1618 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_done()
1620 kfree(ctx->op_iter); in ctrl_dumppolicy_done()
1621 netlink_policy_dump_free(ctx->state); in ctrl_dumppolicy_done()
1630 .maxattr = ARRAY_SIZE(ctrl_policy_family) - 1,
1638 .maxattr = ARRAY_SIZE(ctrl_policy_family) - 1,
1645 .maxattr = ARRAY_SIZE(ctrl_policy_policy) - 1,
1654 { .name = "notify", },
1665 .name = "nlctrl",
1672 const struct genl_family *family; in genl_bind() local
1678 idr_for_each_entry(&genl_fam_idr, family, id) { in genl_bind()
1682 if (family->n_mcgrps == 0) in genl_bind()
1685 i = group - family->mcgrp_offset; in genl_bind()
1686 if (i < 0 || i >= family->n_mcgrps) in genl_bind()
1689 grp = &family->mcgrps[i]; in genl_bind()
1690 if ((grp->flags & GENL_UNS_ADMIN_PERM) && in genl_bind()
1691 !ns_capable(net->user_ns, CAP_NET_ADMIN)) in genl_bind()
1692 ret = -EPERM; in genl_bind()
1710 net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, &cfg); in genl_pernet_init()
1712 if (!net->genl_sock && net_eq(net, &init_net)) in genl_pernet_init()
1715 if (!net->genl_sock) in genl_pernet_init()
1716 return -ENOMEM; in genl_pernet_init()
1723 netlink_kernel_release(net->genl_sock); in genl_pernet_exit()
1724 net->genl_sock = NULL; in genl_pernet_exit()
1764 err = -ENOMEM; in genlmsg_mcast()
1767 err = nlmsg_multicast(prev->genl_sock, tmp, in genlmsg_mcast()
1771 else if (err != -ESRCH) in genlmsg_mcast()
1778 err = nlmsg_multicast(prev->genl_sock, skb, portid, group, flags); in genlmsg_mcast()
1781 else if (err != -ESRCH) in genlmsg_mcast()
1783 return delivered ? 0 : -ESRCH; in genlmsg_mcast()
1789 int genlmsg_multicast_allns(const struct genl_family *family, in genlmsg_multicast_allns() argument
1793 if (WARN_ON_ONCE(group >= family->n_mcgrps)) in genlmsg_multicast_allns()
1794 return -EINVAL; in genlmsg_multicast_allns()
1796 group = family->mcgrp_offset + group; in genlmsg_multicast_allns()
1801 void genl_notify(const struct genl_family *family, struct sk_buff *skb, in genl_notify() argument
1805 struct sock *sk = net->genl_sock; in genl_notify()
1807 if (WARN_ON_ONCE(group >= family->n_mcgrps)) in genl_notify()
1810 group = family->mcgrp_offset + group; in genl_notify()
1811 nlmsg_notify(sk, skb, info->snd_portid, group, in genl_notify()
1812 nlmsg_report(info->nlhdr), flags); in genl_notify()