89 static int genl_ctrl_event(int event, struct genl_family *family,
127 static const struct genl_ops *genl_get_cmd(u8 cmd, struct genl_family *family)  in genl_get_cmd()  argument
131 	for (i = 0; i < family->n_ops; i++)  in genl_get_cmd()
132 		if (family->ops[i].cmd == cmd)  in genl_get_cmd()
133 			return &family->ops[i];  in genl_get_cmd()
220 static int genl_validate_assign_mc_groups(struct genl_family *family)  in genl_validate_assign_mc_groups()  argument
223 	int n_groups = family->n_mcgrps;  in genl_validate_assign_mc_groups()
231 		const struct genl_multicast_group *grp = &family->mcgrps[i];  in genl_validate_assign_mc_groups()
240 	if (family == &genl_ctrl) {  in genl_validate_assign_mc_groups()
243 	} else if (strcmp(family->name, "NET_DM") == 0) {  in genl_validate_assign_mc_groups()
246 	} else if (family->id == GENL_ID_VFS_DQUOT) {  in genl_validate_assign_mc_groups()
249 	} else if (family->id == GENL_ID_PMCRAID) {  in genl_validate_assign_mc_groups()
259 	family->mcgrp_offset = first_id;  in genl_validate_assign_mc_groups()
265 	if (family->netnsok) {  in genl_validate_assign_mc_groups()
291 		for (i = 0; i < family->n_mcgrps; i++)  in genl_validate_assign_mc_groups()
292 			clear_bit(family->mcgrp_offset + i, mc_groups);  in genl_validate_assign_mc_groups()
298 static void genl_unregister_mc_groups(struct genl_family *family)  in genl_unregister_mc_groups()  argument
306 		for (i = 0; i < family->n_mcgrps; i++)  in genl_unregister_mc_groups()
308 				net->genl_sock, family->mcgrp_offset + i);  in genl_unregister_mc_groups()
313 	for (i = 0; i < family->n_mcgrps; i++) {  in genl_unregister_mc_groups()
314 		int grp_id = family->mcgrp_offset + i;  in genl_unregister_mc_groups()
318 		genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, family,  in genl_unregister_mc_groups()
319 				&family->mcgrps[i], grp_id);  in genl_unregister_mc_groups()
323 static int genl_validate_ops(const struct genl_family *family)  in genl_validate_ops()  argument
325 	const struct genl_ops *ops = family->ops;  in genl_validate_ops()
326 	unsigned int n_ops = family->n_ops;  in genl_validate_ops()
360 int __genl_register_family(struct genl_family *family)  in __genl_register_family()  argument
364 	if (family->id && family->id < GENL_MIN_ID)  in __genl_register_family()
367 	if (family->id > GENL_MAX_ID)  in __genl_register_family()
370 	err = genl_validate_ops(family);  in __genl_register_family()
376 	if (genl_family_find_byname(family->name)) {  in __genl_register_family()
381 	if (family->id == GENL_ID_GENERATE) {  in __genl_register_family()
389 		family->id = newid;  in __genl_register_family()
390 	} else if (genl_family_find_byid(family->id)) {  in __genl_register_family()
395 	if (family->maxattr && !family->parallel_ops) {  in __genl_register_family()
396 		family->attrbuf = kmalloc((family->maxattr+1) *  in __genl_register_family()
398 		if (family->attrbuf == NULL) {  in __genl_register_family()
403 		family->attrbuf = NULL;  in __genl_register_family()
405 	err = genl_validate_assign_mc_groups(family);  in __genl_register_family()
409 	list_add_tail(&family->family_list, genl_family_chain(family->id));  in __genl_register_family()
413 	genl_ctrl_event(CTRL_CMD_NEWFAMILY, family, NULL, 0);  in __genl_register_family()
414 	for (i = 0; i < family->n_mcgrps; i++)  in __genl_register_family()
415 		genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, family,  in __genl_register_family()
416 				&family->mcgrps[i], family->mcgrp_offset + i);  in __genl_register_family()
435 int genl_unregister_family(struct genl_family *family)  in genl_unregister_family()  argument
441 	list_for_each_entry(rc, genl_family_chain(family->id), family_list) {  in genl_unregister_family()
442 		if (family->id != rc->id || strcmp(rc->name, family->name))  in genl_unregister_family()
445 		genl_unregister_mc_groups(family);  in genl_unregister_family()
448 		family->n_ops = 0;  in genl_unregister_family()
454 		kfree(family->attrbuf);  in genl_unregister_family()
455 		genl_ctrl_event(CTRL_CMD_DELFAMILY, family, NULL, 0);  in genl_unregister_family()
497 				struct genl_family *family, int flags, u8 cmd)  in genlmsg_put()  argument
502 	nlh = nlmsg_put(skb, portid, seq, family->id, GENL_HDRLEN +  in genlmsg_put()
503 			family->hdrsize, flags);  in genlmsg_put()
509 	hdr->version = family->version;  in genlmsg_put()
542 static int genl_family_rcv_msg(struct genl_family *family,  in genl_family_rcv_msg()  argument
554 	if (!family->netnsok && !net_eq(net, &init_net))  in genl_family_rcv_msg()
557 	hdrlen = GENL_HDRLEN + family->hdrsize;  in genl_family_rcv_msg()
561 	ops = genl_get_cmd(hdr->cmd, family);  in genl_family_rcv_msg()
575 		if (!family->parallel_ops) {  in genl_family_rcv_msg()
577 				.module = family->module,  in genl_family_rcv_msg()
590 				.module = family->module,  in genl_family_rcv_msg()
604 	if (family->maxattr && family->parallel_ops) {  in genl_family_rcv_msg()
605 		attrbuf = kmalloc((family->maxattr+1) *  in genl_family_rcv_msg()
610 		attrbuf = family->attrbuf;  in genl_family_rcv_msg()
613 		err = nlmsg_parse(nlh, hdrlen, attrbuf, family->maxattr,  in genl_family_rcv_msg()
629 	if (family->pre_doit) {  in genl_family_rcv_msg()
630 		err = family->pre_doit(ops, skb, &info);  in genl_family_rcv_msg()
637 	if (family->post_doit)  in genl_family_rcv_msg()
638 		family->post_doit(ops, skb, &info);  in genl_family_rcv_msg()
641 	if (family->parallel_ops)  in genl_family_rcv_msg()
649 	struct genl_family *family;  in genl_rcv_msg()  local
652 	family = genl_family_find_byid(nlh->nlmsg_type);  in genl_rcv_msg()
653 	if (family == NULL)  in genl_rcv_msg()
656 	if (!family->parallel_ops)  in genl_rcv_msg()
659 	err = genl_family_rcv_msg(family, skb, nlh);  in genl_rcv_msg()
661 	if (!family->parallel_ops)  in genl_rcv_msg()
686 static int ctrl_fill_info(struct genl_family *family, u32 portid, u32 seq,  in ctrl_fill_info()  argument
695 	if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) ||  in ctrl_fill_info()
696 	    nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id) ||  in ctrl_fill_info()
697 	    nla_put_u32(skb, CTRL_ATTR_VERSION, family->version) ||  in ctrl_fill_info()
698 	    nla_put_u32(skb, CTRL_ATTR_HDRSIZE, family->hdrsize) ||  in ctrl_fill_info()
699 	    nla_put_u32(skb, CTRL_ATTR_MAXATTR, family->maxattr))  in ctrl_fill_info()
702 	if (family->n_ops) {  in ctrl_fill_info()
710 		for (i = 0; i < family->n_ops; i++) {  in ctrl_fill_info()
712 			const struct genl_ops *ops = &family->ops[i];  in ctrl_fill_info()
736 	if (family->n_mcgrps) {  in ctrl_fill_info()
744 		for (i = 0; i < family->n_mcgrps; i++) {  in ctrl_fill_info()
748 			grp = &family->mcgrps[i];  in ctrl_fill_info()
755 					family->mcgrp_offset + i) ||  in ctrl_fill_info()
773 static int ctrl_fill_mcgrp_info(struct genl_family *family,  in ctrl_fill_mcgrp_info()  argument
786 	if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) ||  in ctrl_fill_mcgrp_info()
787 	    nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id))  in ctrl_fill_mcgrp_info()
846 static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,  in ctrl_build_family_msg()  argument
856 	err = ctrl_fill_info(family, portid, seq, 0, skb, cmd);  in ctrl_build_family_msg()
866 ctrl_build_mcgrp_msg(struct genl_family *family,  in ctrl_build_mcgrp_msg()  argument
877 	err = ctrl_fill_mcgrp_info(family, grp, grp_id, portid,  in ctrl_build_mcgrp_msg()
940 static int genl_ctrl_event(int event, struct genl_family *family,  in genl_ctrl_event()  argument
954 		msg = ctrl_build_family_msg(family, 0, 0, event);  in genl_ctrl_event()
959 		msg = ctrl_build_mcgrp_msg(family, grp, grp_id, 0, 0, event);  in genl_ctrl_event()
968 	if (!family->netnsok) {  in genl_ctrl_event()
1129 int genlmsg_multicast_allns(struct genl_family *family, struct sk_buff *skb,  in genlmsg_multicast_allns()  argument
1132 	if (WARN_ON_ONCE(group >= family->n_mcgrps))  in genlmsg_multicast_allns()
1134 	group = family->mcgrp_offset + group;  in genlmsg_multicast_allns()
1139 void genl_notify(struct genl_family *family, struct sk_buff *skb,  in genl_notify()  argument
1149 	if (WARN_ON_ONCE(group >= family->n_mcgrps))  in genl_notify()
1151 	group = family->mcgrp_offset + group;  in genl_notify()