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 (!cnt || family->split_ops[i + cnt].cmd == iter->doit.cmd)) { in genl_op_from_split()
230 iter->dumpit = family->split_ops[i + cnt]; in genl_op_from_split()
231 genl_op_fill_in_reject_policy_split(family, &iter->dumpit); in genl_op_from_split()
234 memset(&iter->dumpit, 0, sizeof(iter->dumpit)); in genl_op_from_split()
238 iter->entry_idx += cnt; in genl_op_from_split()
242 genl_get_cmd_split(u32 cmd, u8 flag, const struct genl_family *family, in genl_get_cmd_split() argument
247 for (i = 0; i < family->n_split_ops; i++) in genl_get_cmd_split()
248 if (family->split_ops[i].cmd == cmd && in genl_get_cmd_split()
249 family->split_ops[i].flags & flag) { in genl_get_cmd_split()
250 *op = family->split_ops[i]; in genl_get_cmd_split()
254 return -ENOENT; in genl_get_cmd_split()
259 const struct genl_family *family, in genl_cmd_full_to_split() argument
262 if ((flags & GENL_CMD_CAP_DO && !full->doit) || in genl_cmd_full_to_split()
263 (flags & GENL_CMD_CAP_DUMP && !full->dumpit)) { in genl_cmd_full_to_split()
265 return -ENOENT; in genl_cmd_full_to_split()
269 op->start = full->start; in genl_cmd_full_to_split()
270 op->dumpit = full->dumpit; in genl_cmd_full_to_split()
271 op->done = full->done; in genl_cmd_full_to_split()
273 op->pre_doit = family->pre_doit; in genl_cmd_full_to_split()
274 op->doit = full->doit; in genl_cmd_full_to_split()
275 op->post_doit = family->post_doit; in genl_cmd_full_to_split()
279 full->validate & GENL_DONT_VALIDATE_DUMP) { in genl_cmd_full_to_split()
280 op->policy = NULL; in genl_cmd_full_to_split()
281 op->maxattr = 0; in genl_cmd_full_to_split()
283 op->policy = full->policy; in genl_cmd_full_to_split()
284 op->maxattr = full->maxattr; in genl_cmd_full_to_split()
287 op->cmd = full->cmd; in genl_cmd_full_to_split()
288 op->internal_flags = full->internal_flags; in genl_cmd_full_to_split()
289 op->flags = full->flags; in genl_cmd_full_to_split()
290 op->validate = full->validate; in genl_cmd_full_to_split()
293 op->flags |= flags; in genl_cmd_full_to_split()
300 genl_get_cmd(u32 cmd, u8 flags, const struct genl_family *family, in genl_get_cmd() argument
306 err = genl_get_cmd_full(cmd, family, &full); in genl_get_cmd()
307 if (err == -ENOENT) in genl_get_cmd()
308 err = genl_get_cmd_small(cmd, family, &full); in genl_get_cmd()
311 return genl_cmd_full_to_split(op, family, &full, flags); in genl_get_cmd()
313 err = genl_get_cmd_split(cmd, flags, family, op); in genl_get_cmd()
320 * Fail if both are missing, genl_get_cmd() will zero-init in case of failure.
323 genl_get_cmd_both(u32 cmd, const struct genl_family *family, in genl_get_cmd_both() argument
328 err1 = genl_get_cmd(cmd, GENL_CMD_CAP_DO, family, doit); in genl_get_cmd_both()
329 err2 = genl_get_cmd(cmd, GENL_CMD_CAP_DUMP, family, dumpit); in genl_get_cmd_both()
331 return err1 && err2 ? -ENOENT : 0; in genl_get_cmd_both()
335 genl_op_iter_init(const struct genl_family *family, struct genl_op_iter *iter) in genl_op_iter_init() argument
337 iter->family = family; in genl_op_iter_init()
338 iter->cmd_idx = 0; in genl_op_iter_init()
339 iter->entry_idx = 0; in genl_op_iter_init()
341 iter->flags = 0; in genl_op_iter_init()
343 return iter->family->n_ops + in genl_op_iter_init()
344 iter->family->n_small_ops + in genl_op_iter_init()
345 iter->family->n_split_ops; in genl_op_iter_init()
350 const struct genl_family *family = iter->family; in genl_op_iter_next() local
354 if (iter->entry_idx < family->n_ops) { in genl_op_iter_next()
355 genl_op_from_full(family, iter->entry_idx, &op); in genl_op_iter_next()
356 } else if (iter->entry_idx < family->n_ops + family->n_small_ops) { in genl_op_iter_next()
357 genl_op_from_small(family, iter->entry_idx - family->n_ops, in genl_op_iter_next()
359 } else if (iter->entry_idx < in genl_op_iter_next()
360 family->n_ops + family->n_small_ops + family->n_split_ops) { in genl_op_iter_next()
368 iter->cmd_idx++; in genl_op_iter_next()
371 iter->entry_idx++; in genl_op_iter_next()
373 genl_cmd_full_to_split(&iter->doit, family, in genl_op_iter_next()
375 genl_cmd_full_to_split(&iter->dumpit, family, in genl_op_iter_next()
379 iter->cmd = iter->doit.cmd | iter->dumpit.cmd; in genl_op_iter_next()
380 iter->flags = iter->doit.flags | iter->dumpit.flags; in genl_op_iter_next()
393 return iter->cmd_idx; in genl_op_iter_idx()
434 return -ENOMEM; in genl_allocate_reserve_groups()
441 return -ENOMEM; in genl_allocate_reserve_groups()
458 static int genl_validate_assign_mc_groups(struct genl_family *family) in genl_validate_assign_mc_groups() argument
461 int n_groups = family->n_mcgrps; in genl_validate_assign_mc_groups()
469 const struct genl_multicast_group *grp = &family->mcgrps[i]; in genl_validate_assign_mc_groups()
471 if (WARN_ON(grp->name[0] == '\0')) in genl_validate_assign_mc_groups()
472 return -EINVAL; in genl_validate_assign_mc_groups()
473 if (WARN_ON(!string_is_terminated(grp->name, GENL_NAMSIZ))) in genl_validate_assign_mc_groups()
474 return -EINVAL; in genl_validate_assign_mc_groups()
477 /* special-case our own group and hacks */ in genl_validate_assign_mc_groups()
478 if (family == &genl_ctrl) { in genl_validate_assign_mc_groups()
481 } else if (strcmp(family->name, "NET_DM") == 0) { in genl_validate_assign_mc_groups()
484 } else if (family->id == GENL_ID_VFS_DQUOT) { in genl_validate_assign_mc_groups()
487 } else if (family->id == GENL_ID_PMCRAID) { in genl_validate_assign_mc_groups()
497 family->mcgrp_offset = first_id; in genl_validate_assign_mc_groups()
503 if (family->netnsok) { in genl_validate_assign_mc_groups()
509 err = __netlink_change_ngroups(net->genl_sock, in genl_validate_assign_mc_groups()
529 for (i = 0; i < family->n_mcgrps; i++) in genl_validate_assign_mc_groups()
530 clear_bit(family->mcgrp_offset + i, mc_groups); in genl_validate_assign_mc_groups()
536 static void genl_unregister_mc_groups(const struct genl_family *family) in genl_unregister_mc_groups() argument
544 for (i = 0; i < family->n_mcgrps; i++) in genl_unregister_mc_groups()
546 net->genl_sock, family->mcgrp_offset + i); in genl_unregister_mc_groups()
551 for (i = 0; i < family->n_mcgrps; i++) { in genl_unregister_mc_groups()
552 int grp_id = family->mcgrp_offset + i; in genl_unregister_mc_groups()
556 genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, family, in genl_unregister_mc_groups()
557 &family->mcgrps[i], grp_id); in genl_unregister_mc_groups()
563 if (WARN_ON(hweight8(op->flags & (GENL_CMD_CAP_DO | in genl_split_op_check()
569 static int genl_validate_ops(const struct genl_family *family) in genl_validate_ops() argument
574 if (WARN_ON(family->n_ops && !family->ops) || in genl_validate_ops()
575 WARN_ON(family->n_small_ops && !family->small_ops) || in genl_validate_ops()
576 WARN_ON(family->n_split_ops && !family->split_ops)) in genl_validate_ops()
577 return -EINVAL; in genl_validate_ops()
579 for (genl_op_iter_init(family, &i); genl_op_iter_next(&i); ) { in genl_validate_ops()
581 return -EINVAL; in genl_validate_ops()
583 if (WARN_ON(i.cmd >= family->resv_start_op && in genl_validate_ops()
585 return -EINVAL; in genl_validate_ops()
590 return -EINVAL; in genl_validate_ops()
594 if (family->n_split_ops) { in genl_validate_ops()
595 if (genl_split_op_check(&family->split_ops[0])) in genl_validate_ops()
596 return -EINVAL; in genl_validate_ops()
599 for (s = 1; s < family->n_split_ops; s++) { in genl_validate_ops()
602 a = &family->split_ops[s - 1]; in genl_validate_ops()
603 b = &family->split_ops[s]; in genl_validate_ops()
606 return -EINVAL; in genl_validate_ops()
609 if (a->cmd < b->cmd) { in genl_validate_ops()
611 } else if (a->cmd > b->cmd) { in genl_validate_ops()
613 return -EINVAL; in genl_validate_ops()
616 if (a->internal_flags != b->internal_flags || in genl_validate_ops()
617 ((a->flags ^ b->flags) & ~(GENL_CMD_CAP_DO | in genl_validate_ops()
620 return -EINVAL; in genl_validate_ops()
623 if ((a->flags & GENL_CMD_CAP_DO) && in genl_validate_ops()
624 (b->flags & GENL_CMD_CAP_DUMP)) in genl_validate_ops()
628 return -EINVAL; in genl_validate_ops()
634 static void *genl_sk_priv_alloc(struct genl_family *family) in genl_sk_priv_alloc() argument
638 priv = kzalloc(family->sock_priv_size, GFP_KERNEL); in genl_sk_priv_alloc()
640 return ERR_PTR(-ENOMEM); in genl_sk_priv_alloc()
642 if (family->sock_priv_init) in genl_sk_priv_alloc()
643 family->sock_priv_init(priv); in genl_sk_priv_alloc()
648 static void genl_sk_priv_free(const struct genl_family *family, void *priv) in genl_sk_priv_free() argument
650 if (family->sock_priv_destroy) in genl_sk_priv_free()
651 family->sock_priv_destroy(priv); in genl_sk_priv_free()
655 static int genl_sk_privs_alloc(struct genl_family *family) in genl_sk_privs_alloc() argument
657 if (!family->sock_priv_size) in genl_sk_privs_alloc()
660 family->sock_privs = kzalloc(sizeof(*family->sock_privs), GFP_KERNEL); in genl_sk_privs_alloc()
661 if (!family->sock_privs) in genl_sk_privs_alloc()
662 return -ENOMEM; in genl_sk_privs_alloc()
663 xa_init(family->sock_privs); in genl_sk_privs_alloc()
667 static void genl_sk_privs_free(const struct genl_family *family) in genl_sk_privs_free() argument
672 if (!family->sock_priv_size) in genl_sk_privs_free()
675 xa_for_each(family->sock_privs, id, priv) in genl_sk_privs_free()
676 genl_sk_priv_free(family, priv); in genl_sk_privs_free()
678 xa_destroy(family->sock_privs); in genl_sk_privs_free()
679 kfree(family->sock_privs); in genl_sk_privs_free()
682 static void genl_sk_priv_free_by_sock(struct genl_family *family, in genl_sk_priv_free_by_sock() argument
687 if (!family->sock_priv_size) in genl_sk_priv_free_by_sock()
689 priv = xa_erase(family->sock_privs, (unsigned long) sk); in genl_sk_priv_free_by_sock()
692 genl_sk_priv_free(family, priv); in genl_sk_priv_free_by_sock()
697 struct genl_family *family; in genl_release() local
702 idr_for_each_entry(&genl_fam_idr, family, id) in genl_release()
703 genl_sk_priv_free_by_sock(family, sk); in genl_release()
709 * __genl_sk_priv_get - Get family private pointer for socket, if exists
711 * @family: family
714 * Lookup a private memory for a Generic netlink family and specified socket.
721 void *__genl_sk_priv_get(struct genl_family *family, struct sock *sk) in __genl_sk_priv_get() argument
723 if (WARN_ON_ONCE(!family->sock_privs)) in __genl_sk_priv_get()
724 return ERR_PTR(-EINVAL); in __genl_sk_priv_get()
725 return xa_load(family->sock_privs, (unsigned long) sk); in __genl_sk_priv_get()
729 * genl_sk_priv_get - Get family private pointer for socket
731 * @family: family
734 * Lookup a private memory for a Generic netlink family and specified socket.
740 void *genl_sk_priv_get(struct genl_family *family, struct sock *sk) in genl_sk_priv_get() argument
744 priv = __genl_sk_priv_get(family, sk); in genl_sk_priv_get()
748 /* priv for the family does not exist so far, create it. */ in genl_sk_priv_get()
750 priv = genl_sk_priv_alloc(family); in genl_sk_priv_get()
754 old_priv = xa_cmpxchg(family->sock_privs, (unsigned long) sk, NULL, in genl_sk_priv_get()
757 genl_sk_priv_free(family, priv); in genl_sk_priv_get()
767 * genl_register_family - register a generic netlink family
768 * @family: generic netlink family
770 * Registers the specified family after validating it first. Only one
771 * family may be registered with the same family name or identifier.
773 * The family's ops, multicast groups and module pointer must already
778 int genl_register_family(struct genl_family *family) in genl_register_family() argument
783 err = genl_validate_ops(family); in genl_register_family()
789 if (genl_family_find_byname(family->name)) { in genl_register_family()
790 err = -EEXIST; in genl_register_family()
794 err = genl_sk_privs_alloc(family); in genl_register_family()
799 * Sadly, a few cases need to be special-cased in genl_register_family()
801 * and having used their family ID also as their in genl_register_family()
805 if (family == &genl_ctrl) { in genl_register_family()
806 /* and this needs to be special for initial family lookups */ in genl_register_family()
808 } else if (strcmp(family->name, "pmcraid") == 0) { in genl_register_family()
810 } else if (strcmp(family->name, "VFS_DQUOT") == 0) { in genl_register_family()
814 family->id = idr_alloc_cyclic(&genl_fam_idr, family, in genl_register_family()
816 if (family->id < 0) { in genl_register_family()
817 err = family->id; in genl_register_family()
821 err = genl_validate_assign_mc_groups(family); in genl_register_family()
828 genl_ctrl_event(CTRL_CMD_NEWFAMILY, family, NULL, 0); in genl_register_family()
829 for (i = 0; i < family->n_mcgrps; i++) in genl_register_family()
830 genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, family, in genl_register_family()
831 &family->mcgrps[i], family->mcgrp_offset + i); in genl_register_family()
836 idr_remove(&genl_fam_idr, family->id); in genl_register_family()
838 genl_sk_privs_free(family); in genl_register_family()
846 * genl_unregister_family - unregister generic netlink family
847 * @family: generic netlink family
849 * Unregisters the specified family.
853 int genl_unregister_family(const struct genl_family *family) in genl_unregister_family() argument
857 if (!genl_family_find_byid(family->id)) { in genl_unregister_family()
859 return -ENOENT; in genl_unregister_family()
862 genl_unregister_mc_groups(family); in genl_unregister_family()
864 idr_remove(&genl_fam_idr, family->id); in genl_unregister_family()
870 genl_sk_privs_free(family); in genl_unregister_family()
874 genl_ctrl_event(CTRL_CMD_DELFAMILY, family, NULL, 0); in genl_unregister_family()
881 * genlmsg_put - Add generic netlink header to netlink message
885 * @family: generic netlink family
892 const struct genl_family *family, int flags, u8 cmd) in genlmsg_put() argument
897 nlh = nlmsg_put(skb, portid, seq, family->id, GENL_HDRLEN + in genlmsg_put()
898 family->hdrsize, flags); in genlmsg_put()
903 hdr->cmd = cmd; in genlmsg_put()
904 hdr->version = family->version; in genlmsg_put()
905 hdr->reserved = 0; in genlmsg_put()
922 genl_family_rcv_msg_attrs_parse(const struct genl_family *family, in genl_family_rcv_msg_attrs_parse() argument
929 enum netlink_validation validate = ops->validate & no_strict_flag ? in genl_family_rcv_msg_attrs_parse()
935 if (!ops->maxattr) in genl_family_rcv_msg_attrs_parse()
938 attrbuf = kmalloc_array(ops->maxattr + 1, in genl_family_rcv_msg_attrs_parse()
941 return ERR_PTR(-ENOMEM); in genl_family_rcv_msg_attrs_parse()
943 err = __nlmsg_parse(nlh, hdrlen, attrbuf, ops->maxattr, ops->policy, in genl_family_rcv_msg_attrs_parse()
958 const struct genl_family *family; member
967 struct genl_start_context *ctx = cb->data; in genl_start()
973 ops = ctx->ops; in genl_start()
974 if (!(ops->validate & GENL_DONT_VALIDATE_DUMP) && in genl_start()
975 ctx->nlh->nlmsg_len < nlmsg_msg_size(ctx->hdrlen)) in genl_start()
976 return -EINVAL; in genl_start()
978 attrs = genl_family_rcv_msg_attrs_parse(ctx->family, ctx->nlh, ctx->extack, in genl_start()
979 ops, ctx->hdrlen, in genl_start()
987 return -ENOMEM; in genl_start()
989 info->op = *ops; in genl_start()
990 info->info.family = ctx->family; in genl_start()
991 info->info.snd_seq = cb->nlh->nlmsg_seq; in genl_start()
992 info->info.snd_portid = NETLINK_CB(cb->skb).portid; in genl_start()
993 info->info.nlhdr = cb->nlh; in genl_start()
994 info->info.genlhdr = nlmsg_data(cb->nlh); in genl_start()
995 info->info.attrs = attrs; in genl_start()
996 genl_info_net_set(&info->info, sock_net(cb->skb->sk)); in genl_start()
997 info->info.extack = cb->extack; in genl_start()
998 memset(&info->info.user_ptr, 0, sizeof(info->info.user_ptr)); in genl_start()
1000 cb->data = info; in genl_start()
1001 if (ops->start) { in genl_start()
1002 genl_op_lock(ctx->family); in genl_start()
1003 rc = ops->start(cb); in genl_start()
1004 genl_op_unlock(ctx->family); in genl_start()
1008 genl_family_rcv_msg_attrs_free(info->info.attrs); in genl_start()
1010 cb->data = NULL; in genl_start()
1017 struct genl_dumpit_info *dump_info = cb->data; in genl_dumpit()
1018 const struct genl_split_ops *ops = &dump_info->op; in genl_dumpit()
1019 struct genl_info *info = &dump_info->info; in genl_dumpit()
1022 info->extack = cb->extack; in genl_dumpit()
1024 genl_op_lock(info->family); in genl_dumpit()
1025 rc = ops->dumpit(skb, cb); in genl_dumpit()
1026 genl_op_unlock(info->family); in genl_dumpit()
1032 struct genl_dumpit_info *dump_info = cb->data; in genl_done()
1033 const struct genl_split_ops *ops = &dump_info->op; in genl_done()
1034 struct genl_info *info = &dump_info->info; in genl_done()
1037 info->extack = cb->extack; in genl_done()
1039 if (ops->done) { in genl_done()
1040 genl_op_lock(info->family); in genl_done()
1041 rc = ops->done(cb); in genl_done()
1042 genl_op_unlock(info->family); in genl_done()
1044 genl_family_rcv_msg_attrs_free(info->attrs); in genl_done()
1049 static int genl_family_rcv_msg_dumpit(const struct genl_family *family, in genl_family_rcv_msg_dumpit() argument
1057 struct netlink_dump_control c = { in genl_family_rcv_msg_dumpit() local
1058 .module = family->module, in genl_family_rcv_msg_dumpit()
1067 ctx.family = family; in genl_family_rcv_msg_dumpit()
1073 genl_op_unlock(family); in genl_family_rcv_msg_dumpit()
1074 err = __netlink_dump_start(net->genl_sock, skb, nlh, &c); in genl_family_rcv_msg_dumpit()
1075 genl_op_lock(family); in genl_family_rcv_msg_dumpit()
1080 static int genl_family_rcv_msg_doit(const struct genl_family *family, in genl_family_rcv_msg_doit() argument
1091 attrbuf = genl_family_rcv_msg_attrs_parse(family, nlh, extack, in genl_family_rcv_msg_doit()
1097 info.snd_seq = nlh->nlmsg_seq; in genl_family_rcv_msg_doit()
1099 info.family = family; in genl_family_rcv_msg_doit()
1107 if (ops->pre_doit) { in genl_family_rcv_msg_doit()
1108 err = ops->pre_doit(ops, skb, &info); in genl_family_rcv_msg_doit()
1113 err = ops->doit(skb, &info); in genl_family_rcv_msg_doit()
1115 if (ops->post_doit) in genl_family_rcv_msg_doit()
1116 ops->post_doit(ops, skb, &info); in genl_family_rcv_msg_doit()
1124 static int genl_header_check(const struct genl_family *family, in genl_header_check() argument
1131 if (hdr->cmd < family->resv_start_op) in genl_header_check()
1134 if (hdr->reserved) { in genl_header_check()
1136 return -EINVAL; in genl_header_check()
1142 flags = nlh->nlmsg_flags; in genl_header_check()
1148 return -EINVAL; in genl_header_check()
1154 static int genl_family_rcv_msg(const struct genl_family *family, in genl_family_rcv_msg() argument
1159 struct net *net = sock_net(skb->sk); in genl_family_rcv_msg()
1165 /* this family doesn't exist in this netns */ in genl_family_rcv_msg()
1166 if (!family->netnsok && !net_eq(net, &init_net)) in genl_family_rcv_msg()
1167 return -ENOENT; in genl_family_rcv_msg()
1169 hdrlen = GENL_HDRLEN + family->hdrsize; in genl_family_rcv_msg()
1170 if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) in genl_family_rcv_msg()
1171 return -EINVAL; in genl_family_rcv_msg()
1173 if (genl_header_check(family, nlh, hdr, extack)) in genl_family_rcv_msg()
1174 return -EINVAL; in genl_family_rcv_msg()
1176 flags = (nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP ? in genl_family_rcv_msg()
1178 if (genl_get_cmd(hdr->cmd, flags, family, &op)) in genl_family_rcv_msg()
1179 return -EOPNOTSUPP; in genl_family_rcv_msg()
1183 return -EPERM; in genl_family_rcv_msg()
1186 !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) in genl_family_rcv_msg()
1187 return -EPERM; in genl_family_rcv_msg()
1190 return genl_family_rcv_msg_dumpit(family, skb, nlh, extack, in genl_family_rcv_msg()
1193 return genl_family_rcv_msg_doit(family, skb, nlh, extack, in genl_family_rcv_msg()
1200 const struct genl_family *family; in genl_rcv_msg() local
1203 family = genl_family_find_byid(nlh->nlmsg_type); in genl_rcv_msg()
1204 if (family == NULL) in genl_rcv_msg()
1205 return -ENOENT; in genl_rcv_msg()
1207 genl_op_lock(family); in genl_rcv_msg()
1208 err = genl_family_rcv_msg(family, skb, nlh, extack); in genl_rcv_msg()
1209 genl_op_unlock(family); in genl_rcv_msg()
1227 static int ctrl_fill_info(const struct genl_family *family, u32 portid, u32 seq, in ctrl_fill_info() argument
1235 return -1; in ctrl_fill_info()
1237 if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) || in ctrl_fill_info()
1238 nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id) || in ctrl_fill_info()
1239 nla_put_u32(skb, CTRL_ATTR_VERSION, family->version) || in ctrl_fill_info()
1240 nla_put_u32(skb, CTRL_ATTR_HDRSIZE, family->hdrsize) || in ctrl_fill_info()
1241 nla_put_u32(skb, CTRL_ATTR_MAXATTR, family->maxattr)) in ctrl_fill_info()
1244 if (genl_op_iter_init(family, &i)) { in ctrl_fill_info()
1273 if (family->n_mcgrps) { in ctrl_fill_info()
1281 for (i = 0; i < family->n_mcgrps; i++) { in ctrl_fill_info()
1285 grp = &family->mcgrps[i]; in ctrl_fill_info()
1292 family->mcgrp_offset + i) || in ctrl_fill_info()
1294 grp->name)) in ctrl_fill_info()
1307 return -EMSGSIZE; in ctrl_fill_info()
1310 static int ctrl_fill_mcgrp_info(const struct genl_family *family, in ctrl_fill_mcgrp_info() argument
1321 return -1; in ctrl_fill_mcgrp_info()
1323 if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) || in ctrl_fill_mcgrp_info()
1324 nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id)) in ctrl_fill_mcgrp_info()
1337 grp->name)) in ctrl_fill_mcgrp_info()
1348 return -EMSGSIZE; in ctrl_fill_mcgrp_info()
1355 struct net *net = sock_net(skb->sk); in ctrl_dumpfamily()
1356 int fams_to_skip = cb->args[0]; in ctrl_dumpfamily()
1360 if (!rt->netnsok && !net_eq(net, &init_net)) in ctrl_dumpfamily()
1366 if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).portid, in ctrl_dumpfamily()
1367 cb->nlh->nlmsg_seq, NLM_F_MULTI, in ctrl_dumpfamily()
1369 n--; in ctrl_dumpfamily()
1374 cb->args[0] = n; in ctrl_dumpfamily()
1375 return skb->len; in ctrl_dumpfamily()
1378 static struct sk_buff *ctrl_build_family_msg(const struct genl_family *family, in ctrl_build_family_msg() argument
1386 return ERR_PTR(-ENOBUFS); in ctrl_build_family_msg()
1388 err = ctrl_fill_info(family, portid, seq, 0, skb, cmd); in ctrl_build_family_msg()
1398 ctrl_build_mcgrp_msg(const struct genl_family *family, in ctrl_build_mcgrp_msg() argument
1407 return ERR_PTR(-ENOBUFS); in ctrl_build_mcgrp_msg()
1409 err = ctrl_fill_mcgrp_info(family, grp, grp_id, portid, in ctrl_build_mcgrp_msg()
1422 .len = GENL_NAMSIZ - 1 },
1429 int err = -EINVAL; in ctrl_getfamily()
1431 if (info->attrs[CTRL_ATTR_FAMILY_ID]) { in ctrl_getfamily()
1432 u16 id = nla_get_u16(info->attrs[CTRL_ATTR_FAMILY_ID]); in ctrl_getfamily()
1434 err = -ENOENT; in ctrl_getfamily()
1437 if (info->attrs[CTRL_ATTR_FAMILY_NAME]) { in ctrl_getfamily()
1438 char *name; in ctrl_getfamily() local
1440 name = nla_data(info->attrs[CTRL_ATTR_FAMILY_NAME]); in ctrl_getfamily()
1441 res = genl_family_find_byname(name); in ctrl_getfamily()
1446 request_module("net-pf-%d-proto-%d-family-%s", in ctrl_getfamily()
1447 PF_NETLINK, NETLINK_GENERIC, name); in ctrl_getfamily()
1450 res = genl_family_find_byname(name); in ctrl_getfamily()
1453 err = -ENOENT; in ctrl_getfamily()
1459 if (!res->netnsok && !net_eq(genl_info_net(info), &init_net)) { in ctrl_getfamily()
1460 /* family doesn't exist here */ in ctrl_getfamily()
1461 return -ENOENT; in ctrl_getfamily()
1464 msg = ctrl_build_family_msg(res, info->snd_portid, info->snd_seq, in ctrl_getfamily()
1472 static int genl_ctrl_event(int event, const struct genl_family *family, in genl_ctrl_event() argument
1486 msg = ctrl_build_family_msg(family, 0, 0, event); in genl_ctrl_event()
1491 msg = ctrl_build_mcgrp_msg(family, grp, grp_id, 0, 0, event); in genl_ctrl_event()
1494 return -EINVAL; in genl_ctrl_event()
1500 if (!family->netnsok) { in genl_ctrl_event()
1526 .len = GENL_NAMSIZ - 1 },
1533 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_start()
1534 struct nlattr **tb = info->info.attrs; in ctrl_dumppolicy_start()
1539 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); in ctrl_dumppolicy_start()
1542 return -EINVAL; in ctrl_dumppolicy_start()
1545 ctx->fam_id = nla_get_u16(tb[CTRL_ATTR_FAMILY_ID]); in ctrl_dumppolicy_start()
1550 return -ENOENT; in ctrl_dumppolicy_start()
1551 ctx->fam_id = rt->id; in ctrl_dumppolicy_start()
1554 rt = genl_family_find_byid(ctx->fam_id); in ctrl_dumppolicy_start()
1556 return -ENOENT; in ctrl_dumppolicy_start()
1558 ctx->rt = rt; in ctrl_dumppolicy_start()
1563 ctx->single_op = true; in ctrl_dumppolicy_start()
1564 ctx->op = nla_get_u32(tb[CTRL_ATTR_OP]); in ctrl_dumppolicy_start()
1566 err = genl_get_cmd_both(ctx->op, rt, &doit, &dump); in ctrl_dumppolicy_start()
1568 NL_SET_BAD_ATTR(cb->extack, tb[CTRL_ATTR_OP]); in ctrl_dumppolicy_start()
1573 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1580 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1587 if (!ctx->state) in ctrl_dumppolicy_start()
1588 return -ENODATA; in ctrl_dumppolicy_start()
1590 ctx->dump_map = 1; in ctrl_dumppolicy_start()
1594 ctx->op_iter = kmalloc(sizeof(*ctx->op_iter), GFP_KERNEL); in ctrl_dumppolicy_start()
1595 if (!ctx->op_iter) in ctrl_dumppolicy_start()
1596 return -ENOMEM; in ctrl_dumppolicy_start()
1598 genl_op_iter_init(rt, ctx->op_iter); in ctrl_dumppolicy_start()
1599 ctx->dump_map = genl_op_iter_next(ctx->op_iter); in ctrl_dumppolicy_start()
1603 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1610 err = netlink_policy_dump_add_policy(&ctx->state, in ctrl_dumppolicy_start()
1618 if (!ctx->state) { in ctrl_dumppolicy_start()
1619 err = -ENODATA; in ctrl_dumppolicy_start()
1625 netlink_policy_dump_free(ctx->state); in ctrl_dumppolicy_start()
1627 kfree(ctx->op_iter); in ctrl_dumppolicy_start()
1634 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_prep()
1637 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, in ctrl_dumppolicy_prep()
1638 cb->nlh->nlmsg_seq, &genl_ctrl, in ctrl_dumppolicy_prep()
1643 if (nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, ctx->fam_id)) in ctrl_dumppolicy_prep()
1654 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_put_op()
1660 if (!doit->policy && !dumpit->policy) in ctrl_dumppolicy_put_op()
1665 return -ENOBUFS; in ctrl_dumppolicy_put_op()
1671 nest_op = nla_nest_start(skb, doit->cmd); in ctrl_dumppolicy_put_op()
1675 if (doit->policy) { in ctrl_dumppolicy_put_op()
1676 idx = netlink_policy_dump_get_policy_idx(ctx->state, in ctrl_dumppolicy_put_op()
1677 doit->policy, in ctrl_dumppolicy_put_op()
1678 doit->maxattr); in ctrl_dumppolicy_put_op()
1683 if (dumpit->policy) { in ctrl_dumppolicy_put_op()
1684 idx = netlink_policy_dump_get_policy_idx(ctx->state, in ctrl_dumppolicy_put_op()
1685 dumpit->policy, in ctrl_dumppolicy_put_op()
1686 dumpit->maxattr); in ctrl_dumppolicy_put_op()
1699 return -ENOBUFS; in ctrl_dumppolicy_put_op()
1704 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy()
1707 if (ctx->dump_map) { in ctrl_dumppolicy()
1708 if (ctx->single_op) { in ctrl_dumppolicy()
1711 if (WARN_ON(genl_get_cmd_both(ctx->op, ctx->rt, in ctrl_dumppolicy()
1713 return -ENOENT; in ctrl_dumppolicy()
1716 return skb->len; in ctrl_dumppolicy()
1718 /* done with the per-op policy index list */ in ctrl_dumppolicy()
1719 ctx->dump_map = 0; in ctrl_dumppolicy()
1722 while (ctx->dump_map) { in ctrl_dumppolicy()
1724 &ctx->op_iter->doit, in ctrl_dumppolicy()
1725 &ctx->op_iter->dumpit)) in ctrl_dumppolicy()
1726 return skb->len; in ctrl_dumppolicy()
1728 ctx->dump_map = genl_op_iter_next(ctx->op_iter); in ctrl_dumppolicy()
1732 while (netlink_policy_dump_loop(ctx->state)) { in ctrl_dumppolicy()
1743 if (netlink_policy_dump_write(skb, ctx->state)) in ctrl_dumppolicy()
1751 return skb->len; in ctrl_dumppolicy()
1755 return skb->len; in ctrl_dumppolicy()
1760 struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx; in ctrl_dumppolicy_done()
1762 kfree(ctx->op_iter); in ctrl_dumppolicy_done()
1763 netlink_policy_dump_free(ctx->state); in ctrl_dumppolicy_done()
1772 .maxattr = ARRAY_SIZE(ctrl_policy_family) - 1,
1780 .maxattr = ARRAY_SIZE(ctrl_policy_family) - 1,
1787 .maxattr = ARRAY_SIZE(ctrl_policy_policy) - 1,
1796 { .name = "notify", },
1807 .name = "nlctrl",
1814 const struct genl_family *family; in genl_bind() local
1820 idr_for_each_entry(&genl_fam_idr, family, id) { in genl_bind()
1824 if (family->n_mcgrps == 0) in genl_bind()
1827 i = group - family->mcgrp_offset; in genl_bind()
1828 if (i < 0 || i >= family->n_mcgrps) in genl_bind()
1831 grp = &family->mcgrps[i]; in genl_bind()
1832 if ((grp->flags & GENL_MCAST_CAP_NET_ADMIN) && in genl_bind()
1833 !ns_capable(net->user_ns, CAP_NET_ADMIN)) in genl_bind()
1834 ret = -EPERM; in genl_bind()
1835 if ((grp->flags & GENL_MCAST_CAP_SYS_ADMIN) && in genl_bind()
1836 !ns_capable(net->user_ns, CAP_SYS_ADMIN)) in genl_bind()
1837 ret = -EPERM; in genl_bind()
1856 net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, &cfg); in genl_pernet_init()
1858 if (!net->genl_sock && net_eq(net, &init_net)) in genl_pernet_init()
1861 if (!net->genl_sock) in genl_pernet_init()
1862 return -ENOMEM; in genl_pernet_init()
1869 netlink_kernel_release(net->genl_sock); in genl_pernet_exit()
1870 net->genl_sock = NULL; in genl_pernet_exit()
1910 err = -ENOMEM; in genlmsg_mcast()
1913 err = nlmsg_multicast(prev->genl_sock, tmp, in genlmsg_mcast()
1917 else if (err != -ESRCH) in genlmsg_mcast()
1924 err = nlmsg_multicast(prev->genl_sock, skb, portid, group, flags); in genlmsg_mcast()
1927 else if (err != -ESRCH) in genlmsg_mcast()
1929 return delivered ? 0 : -ESRCH; in genlmsg_mcast()
1935 int genlmsg_multicast_allns(const struct genl_family *family, in genlmsg_multicast_allns() argument
1939 if (WARN_ON_ONCE(group >= family->n_mcgrps)) in genlmsg_multicast_allns()
1940 return -EINVAL; in genlmsg_multicast_allns()
1942 group = family->mcgrp_offset + group; in genlmsg_multicast_allns()
1947 void genl_notify(const struct genl_family *family, struct sk_buff *skb, in genl_notify() argument
1951 struct sock *sk = net->genl_sock; in genl_notify()
1953 if (WARN_ON_ONCE(group >= family->n_mcgrps)) in genl_notify()
1956 group = family->mcgrp_offset + group; in genl_notify()
1957 nlmsg_notify(sk, skb, info->snd_portid, group, in genl_notify()
1958 nlmsg_report(info->nlhdr), flags); in genl_notify()