[linux-2.6-block.git] / net / tipc / diag.c

/*
 * net/tipc/diag.c: TIPC socket diag
 *
 * Copyright (c) 2018, Ericsson AB
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "core.h"
#include "socket.h"
#include <linux/sock_diag.h>
#include <linux/tipc_sockets_diag.h>

static u64 __tipc_diag_gen_cookie(struct sock *sk)
{
	u32 res[2];

	sock_diag_save_cookie(sk, res);
	return *((u64 *)res);
}

static int __tipc_add_sock_diag(struct sk_buff *skb,
				struct netlink_callback *cb,
				struct tipc_sock *tsk)
{
	struct tipc_sock_diag_req *req = nlmsg_data(cb->nlh);
	struct nlmsghdr *nlh;
	int err;

	nlh = nlmsg_put_answer(skb, cb, SOCK_DIAG_BY_FAMILY, 0,
			       NLM_F_MULTI);
	if (!nlh)
		return -EMSGSIZE;

	err = tipc_sk_fill_sock_diag(skb, cb, tsk, req->tidiag_states,
				     __tipc_diag_gen_cookie);
	if (err)
		return err;

	nlmsg_end(skb, nlh);
	return 0;
}

static int tipc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
	return tipc_nl_sk_walk(skb, cb, __tipc_add_sock_diag);
}

static int tipc_sock_diag_handler_dump(struct sk_buff *skb,
				       struct nlmsghdr *h)
{
	int hdrlen = sizeof(struct tipc_sock_diag_req);
	struct net *net = sock_net(skb->sk);

	if (nlmsg_len(h) < hdrlen)
		return -EINVAL;

	if (h->nlmsg_flags & NLM_F_DUMP) {
		struct netlink_dump_control c = {
			.start = tipc_dump_start,
			.dump = tipc_diag_dump,
			.done = tipc_dump_done,
		};
		netlink_dump_start(net->diag_nlsk, skb, h, &c);
		return 0;
	}
	return -EOPNOTSUPP;
}

static const struct sock_diag_handler tipc_sock_diag_handler = {
	.family = AF_TIPC,
	.dump = tipc_sock_diag_handler_dump,
};

static int __init tipc_diag_init(void)
{
	return sock_diag_register(&tipc_sock_diag_handler);
}

static void __exit tipc_diag_exit(void)
{
	sock_diag_unregister(&tipc_sock_diag_handler);
}

module_init(tipc_diag_init);
module_exit(tipc_diag_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, AF_TIPC);
Commit	Line	Data
c30b70de GM	1	/*
	2	* net/tipc/diag.c: TIPC socket diag
	3	*
	4	* Copyright (c) 2018, Ericsson AB
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions are met:
	9	*
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. Neither the names of the copyright holders nor the names of its
	16	* contributors may be used to endorse or promote products derived from
	17	* this software without specific prior written permission.
	18	*
	19	* Alternatively, this software may be distributed under the terms of the
	20	* GNU General Public License ("GPL") version 2 as published by the Free
	21	* Software Foundation.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS"
	24	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	27	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	28	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	29	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	32	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	33	* POSSIBILITY OF SUCH DAMAGE.
	34	*/
	35
	36	#include "core.h"
	37	#include "socket.h"
	38	#include <linux/sock_diag.h>
	39	#include <linux/tipc_sockets_diag.h>
	40
	41	static u64 __tipc_diag_gen_cookie(struct sock *sk)
	42	{
	43	u32 res[2];
	44
	45	sock_diag_save_cookie(sk, res);
	46	return ((u64 )res);
	47	}
	48
	49	static int __tipc_add_sock_diag(struct sk_buff *skb,
	50	struct netlink_callback *cb,
	51	struct tipc_sock *tsk)
	52	{
	53	struct tipc_sock_diag_req *req = nlmsg_data(cb->nlh);
	54	struct nlmsghdr *nlh;
	55	int err;
	56
	57	nlh = nlmsg_put_answer(skb, cb, SOCK_DIAG_BY_FAMILY, 0,
	58	NLM_F_MULTI);
	59	if (!nlh)
	60	return -EMSGSIZE;
	61
e41f0548	62	err = tipc_sk_fill_sock_diag(skb, cb, tsk, req->tidiag_states,
c30b70de GM	63	__tipc_diag_gen_cookie);
	64	if (err)
	65	return err;
	66
	67	nlmsg_end(skb, nlh);
	68	return 0;
	69	}
	70
	71	static int tipc_diag_dump(struct sk_buff skb, struct netlink_callback cb)
	72	{
	73	return tipc_nl_sk_walk(skb, cb, __tipc_add_sock_diag);
	74	}
	75
	76	static int tipc_sock_diag_handler_dump(struct sk_buff *skb,
	77	struct nlmsghdr *h)
	78	{
	79	int hdrlen = sizeof(struct tipc_sock_diag_req);
	80	struct net *net = sock_net(skb->sk);
	81
	82	if (nlmsg_len(h) < hdrlen)
	83	return -EINVAL;
	84
	85	if (h->nlmsg_flags & NLM_F_DUMP) {
	86	struct netlink_dump_control c = {
9a07efa9	87	.start = tipc_dump_start,
c30b70de	88	.dump = tipc_diag_dump,
9a07efa9	89	.done = tipc_dump_done,
c30b70de GM	90	};
	91	netlink_dump_start(net->diag_nlsk, skb, h, &c);
	92	return 0;
	93	}
	94	return -EOPNOTSUPP;
	95	}
	96
	97	static const struct sock_diag_handler tipc_sock_diag_handler = {
	98	.family = AF_TIPC,
	99	.dump = tipc_sock_diag_handler_dump,
	100	};
	101
	102	static int __init tipc_diag_init(void)
	103	{
	104	return sock_diag_register(&tipc_sock_diag_handler);
	105	}
	106
	107	static void __exit tipc_diag_exit(void)
	108	{
	109	sock_diag_unregister(&tipc_sock_diag_handler);
	110	}
	111
	112	module_init(tipc_diag_init);
	113	module_exit(tipc_diag_exit);
	114
	115	MODULE_LICENSE("Dual BSD/GPL");
	116	MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, AF_TIPC);