89 static int genl_ctrl_event(int event, const struct genl_family *family,
100 	const struct genl_family *family;  in genl_family_find_byname()  local
103 	idr_for_each_entry(&genl_fam_idr, family, id)  in genl_family_find_byname()
104 		if (strcmp(family->name, name) == 0)  in genl_family_find_byname()
105 			return family;  in genl_family_find_byname()
111 					   const struct genl_family *family)  in genl_get_cmd()  argument
115 	for (i = 0; i < family->n_ops; i++)  in genl_get_cmd()
116 		if (family->ops[i].cmd == cmd)  in genl_get_cmd()
117 			return &family->ops[i];  in genl_get_cmd()
184 static int genl_validate_assign_mc_groups(struct genl_family *family)  in genl_validate_assign_mc_groups()  argument
187 	int n_groups = family->n_mcgrps;  in genl_validate_assign_mc_groups()
195 		const struct genl_multicast_group *grp = &family->mcgrps[i];  in genl_validate_assign_mc_groups()
204 	if (family == &genl_ctrl) {  in genl_validate_assign_mc_groups()
207 	} else if (strcmp(family->name, "NET_DM") == 0) {  in genl_validate_assign_mc_groups()
210 	} else if (family->id == GENL_ID_VFS_DQUOT) {  in genl_validate_assign_mc_groups()
213 	} else if (family->id == GENL_ID_PMCRAID) {  in genl_validate_assign_mc_groups()
223 	family->mcgrp_offset = first_id;  in genl_validate_assign_mc_groups()
229 	if (family->netnsok) {  in genl_validate_assign_mc_groups()
255 		for (i = 0; i < family->n_mcgrps; i++)  in genl_validate_assign_mc_groups()
256 			clear_bit(family->mcgrp_offset + i, mc_groups);  in genl_validate_assign_mc_groups()
262 static void genl_unregister_mc_groups(const struct genl_family *family)  in genl_unregister_mc_groups()  argument
270 		for (i = 0; i < family->n_mcgrps; i++)  in genl_unregister_mc_groups()
272 				net->genl_sock, family->mcgrp_offset + i);  in genl_unregister_mc_groups()
277 	for (i = 0; i < family->n_mcgrps; i++) {  in genl_unregister_mc_groups()
278 		int grp_id = family->mcgrp_offset + i;  in genl_unregister_mc_groups()
282 		genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, family,  in genl_unregister_mc_groups()
283 				&family->mcgrps[i], grp_id);  in genl_unregister_mc_groups()
287 static int genl_validate_ops(const struct genl_family *family)  in genl_validate_ops()  argument
289 	const struct genl_ops *ops = family->ops;  in genl_validate_ops()
290 	unsigned int n_ops = family->n_ops;  in genl_validate_ops()
322 int genl_register_family(struct genl_family *family)  in genl_register_family()  argument
327 	err = genl_validate_ops(family);  in genl_register_family()
333 	if (genl_family_find_byname(family->name)) {  in genl_register_family()
345 	if (family == &genl_ctrl) {  in genl_register_family()
348 	} else if (strcmp(family->name, "pmcraid") == 0) {  in genl_register_family()
350 	} else if (strcmp(family->name, "VFS_DQUOT") == 0) {  in genl_register_family()
354 	if (family->maxattr && !family->parallel_ops) {  in genl_register_family()
355 		family->attrbuf = kmalloc_array(family->maxattr + 1,  in genl_register_family()
358 		if (family->attrbuf == NULL) {  in genl_register_family()
363 		family->attrbuf = NULL;  in genl_register_family()
365 	family->id = idr_alloc_cyclic(&genl_fam_idr, family,  in genl_register_family()
367 	if (family->id < 0) {  in genl_register_family()
368 		err = family->id;  in genl_register_family()
372 	err = genl_validate_assign_mc_groups(family);  in genl_register_family()
379 	genl_ctrl_event(CTRL_CMD_NEWFAMILY, family, NULL, 0);  in genl_register_family()
380 	for (i = 0; i < family->n_mcgrps; i++)  in genl_register_family()
381 		genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, family,  in genl_register_family()
382 				&family->mcgrps[i], family->mcgrp_offset + i);  in genl_register_family()
387 	idr_remove(&genl_fam_idr, family->id);  in genl_register_family()
389 	kfree(family->attrbuf);  in genl_register_family()
404 int genl_unregister_family(const struct genl_family *family)  in genl_unregister_family()  argument
408 	if (!genl_family_find_byid(family->id)) {  in genl_unregister_family()
413 	genl_unregister_mc_groups(family);  in genl_unregister_family()
415 	idr_remove(&genl_fam_idr, family->id);  in genl_unregister_family()
422 	kfree(family->attrbuf);  in genl_unregister_family()
424 	genl_ctrl_event(CTRL_CMD_DELFAMILY, family, NULL, 0);  in genl_unregister_family()
442 		  const struct genl_family *family, int flags, u8 cmd)  in genlmsg_put()  argument
447 	nlh = nlmsg_put(skb, portid, seq, family->id, GENL_HDRLEN +  in genlmsg_put()
448 			family->hdrsize, flags);  in genlmsg_put()
454 	hdr->version = family->version;  in genlmsg_put()
501 static int genl_family_rcv_msg(const struct genl_family *family,  in genl_family_rcv_msg()  argument
514 	if (!family->netnsok && !net_eq(net, &init_net))  in genl_family_rcv_msg()
517 	hdrlen = GENL_HDRLEN + family->hdrsize;  in genl_family_rcv_msg()
521 	ops = genl_get_cmd(hdr->cmd, family);  in genl_family_rcv_msg()
540 			int hdrlen = GENL_HDRLEN + family->hdrsize;  in genl_family_rcv_msg()
545 			if (family->maxattr) {  in genl_family_rcv_msg()
553 						    family->maxattr,  in genl_family_rcv_msg()
554 						    family->policy,  in genl_family_rcv_msg()
561 		if (!family->parallel_ops) {  in genl_family_rcv_msg()
563 				.module = family->module,  in genl_family_rcv_msg()
577 				.module = family->module,  in genl_family_rcv_msg()
592 	if (family->maxattr && family->parallel_ops) {  in genl_family_rcv_msg()
593 		attrbuf = kmalloc_array(family->maxattr + 1,  in genl_family_rcv_msg()
599 		attrbuf = family->attrbuf;  in genl_family_rcv_msg()
607 		err = __nlmsg_parse(nlh, hdrlen, attrbuf, family->maxattr,  in genl_family_rcv_msg()
608 				    family->policy, validate, extack);  in genl_family_rcv_msg()
623 	if (family->pre_doit) {  in genl_family_rcv_msg()
624 		err = family->pre_doit(ops, skb, &info);  in genl_family_rcv_msg()
631 	if (family->post_doit)  in genl_family_rcv_msg()
632 		family->post_doit(ops, skb, &info);  in genl_family_rcv_msg()
635 	if (family->parallel_ops)  in genl_family_rcv_msg()
644 	const struct genl_family *family;  in genl_rcv_msg()  local
647 	family = genl_family_find_byid(nlh->nlmsg_type);  in genl_rcv_msg()
648 	if (family == NULL)  in genl_rcv_msg()
651 	if (!family->parallel_ops)  in genl_rcv_msg()
654 	err = genl_family_rcv_msg(family, skb, nlh, extack);  in genl_rcv_msg()
656 	if (!family->parallel_ops)  in genl_rcv_msg()
675 static int ctrl_fill_info(const struct genl_family *family, u32 portid, u32 seq,  in ctrl_fill_info()  argument
684 	if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) ||  in ctrl_fill_info()
685 	    nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id) ||  in ctrl_fill_info()
686 	    nla_put_u32(skb, CTRL_ATTR_VERSION, family->version) ||  in ctrl_fill_info()
687 	    nla_put_u32(skb, CTRL_ATTR_HDRSIZE, family->hdrsize) ||  in ctrl_fill_info()
688 	    nla_put_u32(skb, CTRL_ATTR_MAXATTR, family->maxattr))  in ctrl_fill_info()
691 	if (family->n_ops) {  in ctrl_fill_info()
699 		for (i = 0; i < family->n_ops; i++) {  in ctrl_fill_info()
701 			const struct genl_ops *ops = &family->ops[i];  in ctrl_fill_info()
708 			if (family->policy)  in ctrl_fill_info()
725 	if (family->n_mcgrps) {  in ctrl_fill_info()
733 		for (i = 0; i < family->n_mcgrps; i++) {  in ctrl_fill_info()
737 			grp = &family->mcgrps[i];  in ctrl_fill_info()
744 					family->mcgrp_offset + i) ||  in ctrl_fill_info()
762 static int ctrl_fill_mcgrp_info(const struct genl_family *family,  in ctrl_fill_mcgrp_info()  argument
775 	if (nla_put_string(skb, CTRL_ATTR_FAMILY_NAME, family->name) ||  in ctrl_fill_mcgrp_info()
776 	    nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, family->id))  in ctrl_fill_mcgrp_info()
830 static struct sk_buff *ctrl_build_family_msg(const struct genl_family *family,  in ctrl_build_family_msg()  argument
840 	err = ctrl_fill_info(family, portid, seq, 0, skb, cmd);  in ctrl_build_family_msg()
850 ctrl_build_mcgrp_msg(const struct genl_family *family,  in ctrl_build_mcgrp_msg()  argument
861 	err = ctrl_fill_mcgrp_info(family, grp, grp_id, portid,  in ctrl_build_mcgrp_msg()
924 static int genl_ctrl_event(int event, const struct genl_family *family,  in genl_ctrl_event()  argument
938 		msg = ctrl_build_family_msg(family, 0, 0, event);  in genl_ctrl_event()
943 		msg = ctrl_build_mcgrp_msg(family, grp, grp_id, 0, 0, event);  in genl_ctrl_event()
952 	if (!family->netnsok) {  in genl_ctrl_event()
1052 struct nlattr **genl_family_attrbuf(const struct genl_family *family)  in genl_family_attrbuf()  argument
1054 	if (!WARN_ON(family->parallel_ops))  in genl_family_attrbuf()
1057 	return family->attrbuf;  in genl_family_attrbuf()
1098 int genlmsg_multicast_allns(const struct genl_family *family,  in genlmsg_multicast_allns()  argument
1102 	if (WARN_ON_ONCE(group >= family->n_mcgrps))  in genlmsg_multicast_allns()
1104 	group = family->mcgrp_offset + group;  in genlmsg_multicast_allns()
1109 void genl_notify(const struct genl_family *family, struct sk_buff *skb,  in genl_notify()  argument
1119 	if (WARN_ON_ONCE(group >= family->n_mcgrps))  in genl_notify()
1121 	group = family->mcgrp_offset + group;  in genl_notify()