[linux-block.git] / net / unix / diag.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/sock_diag.h>
#include <linux/unix_diag.h>
#include <linux/skbuff.h>
#include <linux/module.h>
#include <linux/uidgid.h>
#include <net/netlink.h>
#include <net/af_unix.h>
#include <net/tcp_states.h>
#include <net/sock.h>

static int sk_diag_dump_name(struct sock *sk, struct sk_buff *nlskb)
{
	/* might or might not have unix_table_lock */
	struct unix_address *addr = smp_load_acquire(&unix_sk(sk)->addr);

	if (!addr)
		return 0;

	return nla_put(nlskb, UNIX_DIAG_NAME, addr->len - sizeof(short),
		       addr->name->sun_path);
}

static int sk_diag_dump_vfs(struct sock *sk, struct sk_buff *nlskb)
{
	struct dentry *dentry = unix_sk(sk)->path.dentry;

	if (dentry) {
		struct unix_diag_vfs uv = {
			.udiag_vfs_ino = d_backing_inode(dentry)->i_ino,
			.udiag_vfs_dev = dentry->d_sb->s_dev,
		};

		return nla_put(nlskb, UNIX_DIAG_VFS, sizeof(uv), &uv);
	}

	return 0;
}

static int sk_diag_dump_peer(struct sock *sk, struct sk_buff *nlskb)
{
	struct sock *peer;
	int ino;

	peer = unix_peer_get(sk);
	if (peer) {
		unix_state_lock(peer);
		ino = sock_i_ino(peer);
		unix_state_unlock(peer);
		sock_put(peer);

		return nla_put_u32(nlskb, UNIX_DIAG_PEER, ino);
	}

	return 0;
}

static int sk_diag_dump_icons(struct sock *sk, struct sk_buff *nlskb)
{
	struct sk_buff *skb;
	struct nlattr *attr;
	u32 *buf;
	int i;

	if (sk->sk_state == TCP_LISTEN) {
		spin_lock(&sk->sk_receive_queue.lock);

		attr = nla_reserve(nlskb, UNIX_DIAG_ICONS,
				   sk->sk_receive_queue.qlen * sizeof(u32));
		if (!attr)
			goto errout;

		buf = nla_data(attr);
		i = 0;
		skb_queue_walk(&sk->sk_receive_queue, skb) {
			struct sock *req, *peer;

			req = skb->sk;
			/*
			 * The state lock is outer for the same sk's
			 * queue lock. With the other's queue locked it's
			 * OK to lock the state.
			 */
			unix_state_lock_nested(req);
			peer = unix_sk(req)->peer;
			buf[i++] = (peer ? sock_i_ino(peer) : 0);
			unix_state_unlock(req);
		}
		spin_unlock(&sk->sk_receive_queue.lock);
	}

	return 0;

errout:
	spin_unlock(&sk->sk_receive_queue.lock);
	return -EMSGSIZE;
}

static int sk_diag_show_rqlen(struct sock *sk, struct sk_buff *nlskb)
{
	struct unix_diag_rqlen rql;

	if (sk->sk_state == TCP_LISTEN) {
		rql.udiag_rqueue = sk->sk_receive_queue.qlen;
		rql.udiag_wqueue = sk->sk_max_ack_backlog;
	} else {
		rql.udiag_rqueue = (u32) unix_inq_len(sk);
		rql.udiag_wqueue = (u32) unix_outq_len(sk);
	}

	return nla_put(nlskb, UNIX_DIAG_RQLEN, sizeof(rql), &rql);
}

static int sk_diag_dump_uid(struct sock *sk, struct sk_buff *nlskb)
{
	uid_t uid = from_kuid_munged(sk_user_ns(nlskb->sk), sock_i_uid(sk));
	return nla_put(nlskb, UNIX_DIAG_UID, sizeof(uid_t), &uid);
}

static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req,
		u32 portid, u32 seq, u32 flags, int sk_ino)
{
	struct nlmsghdr *nlh;
	struct unix_diag_msg *rep;

	nlh = nlmsg_put(skb, portid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rep),
			flags);
	if (!nlh)
		return -EMSGSIZE;

	rep = nlmsg_data(nlh);
	rep->udiag_family = AF_UNIX;
	rep->udiag_type = sk->sk_type;
	rep->udiag_state = sk->sk_state;
	rep->pad = 0;
	rep->udiag_ino = sk_ino;
	sock_diag_save_cookie(sk, rep->udiag_cookie);

	if ((req->udiag_show & UDIAG_SHOW_NAME) &&
	    sk_diag_dump_name(sk, skb))
		goto out_nlmsg_trim;

	if ((req->udiag_show & UDIAG_SHOW_VFS) &&
	    sk_diag_dump_vfs(sk, skb))
		goto out_nlmsg_trim;

	if ((req->udiag_show & UDIAG_SHOW_PEER) &&
	    sk_diag_dump_peer(sk, skb))
		goto out_nlmsg_trim;

	if ((req->udiag_show & UDIAG_SHOW_ICONS) &&
	    sk_diag_dump_icons(sk, skb))
		goto out_nlmsg_trim;

	if ((req->udiag_show & UDIAG_SHOW_RQLEN) &&
	    sk_diag_show_rqlen(sk, skb))
		goto out_nlmsg_trim;

	if ((req->udiag_show & UDIAG_SHOW_MEMINFO) &&
	    sock_diag_put_meminfo(sk, skb, UNIX_DIAG_MEMINFO))
		goto out_nlmsg_trim;

	if (nla_put_u8(skb, UNIX_DIAG_SHUTDOWN, sk->sk_shutdown))
		goto out_nlmsg_trim;

	if ((req->udiag_show & UDIAG_SHOW_UID) &&
	    sk_diag_dump_uid(sk, skb))
		goto out_nlmsg_trim;

	nlmsg_end(skb, nlh);
	return 0;

out_nlmsg_trim:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

static int sk_diag_dump(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req,
		u32 portid, u32 seq, u32 flags)
{
	int sk_ino;

	unix_state_lock(sk);
	sk_ino = sock_i_ino(sk);
	unix_state_unlock(sk);

	if (!sk_ino)
		return 0;

	return sk_diag_fill(sk, skb, req, portid, seq, flags, sk_ino);
}

static int unix_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct unix_diag_req *req;
	int num, s_num, slot, s_slot;
	struct net *net = sock_net(skb->sk);

	req = nlmsg_data(cb->nlh);

	s_slot = cb->args[0];
	num = s_num = cb->args[1];

	spin_lock(&unix_table_lock);
	for (slot = s_slot;
	     slot < ARRAY_SIZE(unix_socket_table);
	     s_num = 0, slot++) {
		struct sock *sk;

		num = 0;
		sk_for_each(sk, &unix_socket_table[slot]) {
			if (!net_eq(sock_net(sk), net))
				continue;
			if (num < s_num)
				goto next;
			if (!(req->udiag_states & (1 << sk->sk_state)))
				goto next;
			if (sk_diag_dump(sk, skb, req,
					 NETLINK_CB(cb->skb).portid,
					 cb->nlh->nlmsg_seq,
					 NLM_F_MULTI) < 0)
				goto done;
next:
			num++;
		}
	}
done:
	spin_unlock(&unix_table_lock);
	cb->args[0] = slot;
	cb->args[1] = num;

	return skb->len;
}

static struct sock *unix_lookup_by_ino(unsigned int ino)
{
	int i;
	struct sock *sk;

	spin_lock(&unix_table_lock);
	for (i = 0; i < ARRAY_SIZE(unix_socket_table); i++) {
		sk_for_each(sk, &unix_socket_table[i])
			if (ino == sock_i_ino(sk)) {
				sock_hold(sk);
				spin_unlock(&unix_table_lock);

				return sk;
			}
	}

	spin_unlock(&unix_table_lock);
	return NULL;
}

static int unix_diag_get_exact(struct sk_buff *in_skb,
			       const struct nlmsghdr *nlh,
			       struct unix_diag_req *req)
{
	int err = -EINVAL;
	struct sock *sk;
	struct sk_buff *rep;
	unsigned int extra_len;
	struct net *net = sock_net(in_skb->sk);

	if (req->udiag_ino == 0)
		goto out_nosk;

	sk = unix_lookup_by_ino(req->udiag_ino);
	err = -ENOENT;
	if (sk == NULL)
		goto out_nosk;
	if (!net_eq(sock_net(sk), net))
		goto out;

	err = sock_diag_check_cookie(sk, req->udiag_cookie);
	if (err)
		goto out;

	extra_len = 256;
again:
	err = -ENOMEM;
	rep = nlmsg_new(sizeof(struct unix_diag_msg) + extra_len, GFP_KERNEL);
	if (!rep)
		goto out;

	err = sk_diag_fill(sk, rep, req, NETLINK_CB(in_skb).portid,
			   nlh->nlmsg_seq, 0, req->udiag_ino);
	if (err < 0) {
		nlmsg_free(rep);
		extra_len += 256;
		if (extra_len >= PAGE_SIZE)
			goto out;

		goto again;
	}
	err = nlmsg_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid);

out:
	if (sk)
		sock_put(sk);
out_nosk:
	return err;
}

static int unix_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
{
	int hdrlen = sizeof(struct unix_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 = {
			.dump = unix_diag_dump,
		};
		return netlink_dump_start(net->diag_nlsk, skb, h, &c);
	} else
		return unix_diag_get_exact(skb, h, nlmsg_data(h));
}

static const struct sock_diag_handler unix_diag_handler = {
	.family = AF_UNIX,
	.dump = unix_diag_handler_dump,
};

static int __init unix_diag_init(void)
{
	return sock_diag_register(&unix_diag_handler);
}

static void __exit unix_diag_exit(void)
{
	sock_diag_unregister(&unix_diag_handler);
}

module_init(unix_diag_init);
module_exit(unix_diag_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 1 /* AF_LOCAL */);
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
22931d3b PE	2	#include <linux/types.h>
	3	#include <linux/spinlock.h>
	4	#include <linux/sock_diag.h>
	5	#include <linux/unix_diag.h>
	6	#include <linux/skbuff.h>
2ea744a5	7	#include <linux/module.h>
cae9910e	8	#include <linux/uidgid.h>
22931d3b PE	9	#include <net/netlink.h>
	10	#include <net/af_unix.h>
	11	#include <net/tcp_states.h>
cae9910e	12	#include <net/sock.h>
22931d3b	13
f5248b48 PE	14	static int sk_diag_dump_name(struct sock sk, struct sk_buff nlskb)
f5248b48 PE	15	{
ae3b5641 AV	16	/* might or might not have unix_table_lock */
ae3b5641 AV	17	struct unix_address *addr = smp_load_acquire(&unix_sk(sk)->addr);
f5248b48	18
4245375d TG	19	if (!addr)
4245375d TG	20	return 0;
f5248b48	21
4245375d TG	22	return nla_put(nlskb, UNIX_DIAG_NAME, addr->len - sizeof(short),
4245375d TG	23	addr->name->sun_path);
f5248b48 PE	24	}
f5248b48 PE	25
5f7b0569 PE	26	static int sk_diag_dump_vfs(struct sock sk, struct sk_buff nlskb)
5f7b0569 PE	27	{
40ffe67d	28	struct dentry *dentry = unix_sk(sk)->path.dentry;
5f7b0569 PE	29
5f7b0569 PE	30	if (dentry) {
4245375d	31	struct unix_diag_vfs uv = {
a25b376b	32	.udiag_vfs_ino = d_backing_inode(dentry)->i_ino,
4245375d TG	33	.udiag_vfs_dev = dentry->d_sb->s_dev,
	34	};
	35
	36	return nla_put(nlskb, UNIX_DIAG_VFS, sizeof(uv), &uv);
5f7b0569 PE	37	}
	38
	39	return 0;
5f7b0569 PE	40	}
5f7b0569 PE	41
ac02be8d PE	42	static int sk_diag_dump_peer(struct sock sk, struct sk_buff nlskb)
	43	{
	44	struct sock *peer;
	45	int ino;
	46
	47	peer = unix_peer_get(sk);
	48	if (peer) {
	49	unix_state_lock(peer);
	50	ino = sock_i_ino(peer);
	51	unix_state_unlock(peer);
	52	sock_put(peer);
	53
4245375d	54	return nla_put_u32(nlskb, UNIX_DIAG_PEER, ino);
ac02be8d PE	55	}
	56
	57	return 0;
ac02be8d PE	58	}
ac02be8d PE	59
2aac7a2c PE	60	static int sk_diag_dump_icons(struct sock sk, struct sk_buff nlskb)
	61	{
	62	struct sk_buff *skb;
4245375d	63	struct nlattr *attr;
2aac7a2c PE	64	u32 *buf;
	65	int i;
	66
	67	if (sk->sk_state == TCP_LISTEN) {
	68	spin_lock(&sk->sk_receive_queue.lock);
4245375d TG	69
	70	attr = nla_reserve(nlskb, UNIX_DIAG_ICONS,
	71	sk->sk_receive_queue.qlen * sizeof(u32));
	72	if (!attr)
	73	goto errout;
	74
	75	buf = nla_data(attr);
2aac7a2c PE	76	i = 0;
	77	skb_queue_walk(&sk->sk_receive_queue, skb) {
	78	struct sock req, peer;
	79
	80	req = skb->sk;
	81	/*
	82	* The state lock is outer for the same sk's
	83	* queue lock. With the other's queue locked it's
	84	* OK to lock the state.
	85	*/
	86	unix_state_lock_nested(req);
	87	peer = unix_sk(req)->peer;
e09e9d18	88	buf[i++] = (peer ? sock_i_ino(peer) : 0);
2aac7a2c PE	89	unix_state_unlock(req);
	90	}
	91	spin_unlock(&sk->sk_receive_queue.lock);
	92	}
	93
	94	return 0;
	95
4245375d	96	errout:
2aac7a2c PE	97	spin_unlock(&sk->sk_receive_queue.lock);
	98	return -EMSGSIZE;
	99	}
	100
cbf39195 PE	101	static int sk_diag_show_rqlen(struct sock sk, struct sk_buff nlskb)
cbf39195 PE	102	{
4245375d	103	struct unix_diag_rqlen rql;
c9da99e6 PE	104
c9da99e6 PE	105	if (sk->sk_state == TCP_LISTEN) {
4245375d TG	106	rql.udiag_rqueue = sk->sk_receive_queue.qlen;
4245375d TG	107	rql.udiag_wqueue = sk->sk_max_ack_backlog;
c9da99e6	108	} else {
4245375d TG	109	rql.udiag_rqueue = (u32) unix_inq_len(sk);
4245375d TG	110	rql.udiag_wqueue = (u32) unix_outq_len(sk);
c9da99e6 PE	111	}
c9da99e6 PE	112
4245375d	113	return nla_put(nlskb, UNIX_DIAG_RQLEN, sizeof(rql), &rql);
cbf39195 PE	114	}
cbf39195 PE	115
cae9910e FG	116	static int sk_diag_dump_uid(struct sock sk, struct sk_buff nlskb)
	117	{
	118	uid_t uid = from_kuid_munged(sk_user_ns(nlskb->sk), sock_i_uid(sk));
	119	return nla_put(nlskb, UNIX_DIAG_UID, sizeof(uid_t), &uid);
	120	}
	121
45a96b9b	122	static int sk_diag_fill(struct sock sk, struct sk_buff skb, struct unix_diag_req *req,
15e47304	123	u32 portid, u32 seq, u32 flags, int sk_ino)
45a96b9b	124	{
45a96b9b PE	125	struct nlmsghdr *nlh;
	126	struct unix_diag_msg *rep;
	127
15e47304	128	nlh = nlmsg_put(skb, portid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rep),
4245375d	129	flags);
b61bb019	130	if (!nlh)
4245375d	131	return -EMSGSIZE;
45a96b9b	132
b61bb019	133	rep = nlmsg_data(nlh);
45a96b9b PE	134	rep->udiag_family = AF_UNIX;
	135	rep->udiag_type = sk->sk_type;
	136	rep->udiag_state = sk->sk_state;
6865d1e8	137	rep->pad = 0;
45a96b9b PE	138	rep->udiag_ino = sk_ino;
	139	sock_diag_save_cookie(sk, rep->udiag_cookie);
	140
f5248b48	141	if ((req->udiag_show & UDIAG_SHOW_NAME) &&
257b5298	142	sk_diag_dump_name(sk, skb))
b61bb019	143	goto out_nlmsg_trim;
f5248b48	144
5f7b0569	145	if ((req->udiag_show & UDIAG_SHOW_VFS) &&
257b5298	146	sk_diag_dump_vfs(sk, skb))
b61bb019	147	goto out_nlmsg_trim;
5f7b0569	148
ac02be8d	149	if ((req->udiag_show & UDIAG_SHOW_PEER) &&
257b5298	150	sk_diag_dump_peer(sk, skb))
b61bb019	151	goto out_nlmsg_trim;
ac02be8d	152
2aac7a2c	153	if ((req->udiag_show & UDIAG_SHOW_ICONS) &&
257b5298	154	sk_diag_dump_icons(sk, skb))
b61bb019	155	goto out_nlmsg_trim;
2aac7a2c	156
cbf39195	157	if ((req->udiag_show & UDIAG_SHOW_RQLEN) &&
257b5298	158	sk_diag_show_rqlen(sk, skb))
b61bb019	159	goto out_nlmsg_trim;
257b5298 PE	160
	161	if ((req->udiag_show & UDIAG_SHOW_MEMINFO) &&
	162	sock_diag_put_meminfo(sk, skb, UNIX_DIAG_MEMINFO))
b61bb019	163	goto out_nlmsg_trim;
cbf39195	164
e4e541a8 PE	165	if (nla_put_u8(skb, UNIX_DIAG_SHUTDOWN, sk->sk_shutdown))
	166	goto out_nlmsg_trim;
	167
cae9910e FG	168	if ((req->udiag_show & UDIAG_SHOW_UID) &&
	169	sk_diag_dump_uid(sk, skb))
	170	goto out_nlmsg_trim;
	171
053c095a JB	172	nlmsg_end(skb, nlh);
053c095a JB	173	return 0;
45a96b9b	174
b61bb019	175	out_nlmsg_trim:
4245375d	176	nlmsg_cancel(skb, nlh);
45a96b9b PE	177	return -EMSGSIZE;
	178	}
	179
	180	static int sk_diag_dump(struct sock sk, struct sk_buff skb, struct unix_diag_req *req,
15e47304	181	u32 portid, u32 seq, u32 flags)
45a96b9b PE	182	{
	183	int sk_ino;
	184
	185	unix_state_lock(sk);
	186	sk_ino = sock_i_ino(sk);
	187	unix_state_unlock(sk);
	188
	189	if (!sk_ino)
	190	return 0;
	191
15e47304	192	return sk_diag_fill(sk, skb, req, portid, seq, flags, sk_ino);
45a96b9b PE	193	}
45a96b9b PE	194
22931d3b PE	195	static int unix_diag_dump(struct sk_buff skb, struct netlink_callback cb)
22931d3b PE	196	{
45a96b9b PE	197	struct unix_diag_req *req;
45a96b9b PE	198	int num, s_num, slot, s_slot;
51d7cccf	199	struct net *net = sock_net(skb->sk);
45a96b9b	200
b61bb019	201	req = nlmsg_data(cb->nlh);
45a96b9b PE	202
	203	s_slot = cb->args[0];
	204	num = s_num = cb->args[1];
	205
	206	spin_lock(&unix_table_lock);
7123aaa3 ED	207	for (slot = s_slot;
	208	slot < ARRAY_SIZE(unix_socket_table);
	209	s_num = 0, slot++) {
45a96b9b	210	struct sock *sk;
45a96b9b PE	211
45a96b9b PE	212	num = 0;
b67bfe0d	213	sk_for_each(sk, &unix_socket_table[slot]) {
51d7cccf AV	214	if (!net_eq(sock_net(sk), net))
51d7cccf AV	215	continue;
45a96b9b PE	216	if (num < s_num)
	217	goto next;
	218	if (!(req->udiag_states & (1 << sk->sk_state)))
	219	goto next;
	220	if (sk_diag_dump(sk, skb, req,
15e47304	221	NETLINK_CB(cb->skb).portid,
257b5298 PE	222	cb->nlh->nlmsg_seq,
257b5298 PE	223	NLM_F_MULTI) < 0)
45a96b9b PE	224	goto done;
	225	next:
	226	num++;
	227	}
	228	}
	229	done:
	230	spin_unlock(&unix_table_lock);
	231	cb->args[0] = slot;
	232	cb->args[1] = num;
	233
	234	return skb->len;
22931d3b PE	235	}
22931d3b PE	236
b5f05492	237	static struct sock *unix_lookup_by_ino(unsigned int ino)
5d3cae8b PE	238	{
	239	int i;
	240	struct sock *sk;
	241
	242	spin_lock(&unix_table_lock);
7123aaa3	243	for (i = 0; i < ARRAY_SIZE(unix_socket_table); i++) {
b67bfe0d	244	sk_for_each(sk, &unix_socket_table[i])
5d3cae8b PE	245	if (ino == sock_i_ino(sk)) {
	246	sock_hold(sk);
	247	spin_unlock(&unix_table_lock);
	248
	249	return sk;
	250	}
	251	}
	252
	253	spin_unlock(&unix_table_lock);
	254	return NULL;
	255	}
	256
22931d3b PE	257	static int unix_diag_get_exact(struct sk_buff *in_skb,
	258	const struct nlmsghdr *nlh,
	259	struct unix_diag_req *req)
	260	{
5d3cae8b PE	261	int err = -EINVAL;
	262	struct sock *sk;
	263	struct sk_buff *rep;
	264	unsigned int extra_len;
51d7cccf	265	struct net *net = sock_net(in_skb->sk);
5d3cae8b PE	266
	267	if (req->udiag_ino == 0)
	268	goto out_nosk;
	269
	270	sk = unix_lookup_by_ino(req->udiag_ino);
	271	err = -ENOENT;
	272	if (sk == NULL)
	273	goto out_nosk;
0f5da659 AV	274	if (!net_eq(sock_net(sk), net))
0f5da659 AV	275	goto out;
5d3cae8b PE	276
	277	err = sock_diag_check_cookie(sk, req->udiag_cookie);
	278	if (err)
	279	goto out;
	280
	281	extra_len = 256;
	282	again:
	283	err = -ENOMEM;
4245375d	284	rep = nlmsg_new(sizeof(struct unix_diag_msg) + extra_len, GFP_KERNEL);
5d3cae8b PE	285	if (!rep)
	286	goto out;
	287
15e47304	288	err = sk_diag_fill(sk, rep, req, NETLINK_CB(in_skb).portid,
5d3cae8b PE	289	nlh->nlmsg_seq, 0, req->udiag_ino);
5d3cae8b PE	290	if (err < 0) {
4245375d	291	nlmsg_free(rep);
5d3cae8b PE	292	extra_len += 256;
	293	if (extra_len >= PAGE_SIZE)
	294	goto out;
	295
	296	goto again;
	297	}
01757f53 YD	298	err = nlmsg_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid);
01757f53 YD	299
5d3cae8b PE	300	out:
	301	if (sk)
	302	sock_put(sk);
	303	out_nosk:
	304	return err;
22931d3b PE	305	}
	306
	307	static int unix_diag_handler_dump(struct sk_buff skb, struct nlmsghdr h)
	308	{
	309	int hdrlen = sizeof(struct unix_diag_req);
51d7cccf	310	struct net *net = sock_net(skb->sk);
22931d3b PE	311
	312	if (nlmsg_len(h) < hdrlen)
	313	return -EINVAL;
	314
80d326fa PNA	315	if (h->nlmsg_flags & NLM_F_DUMP) {
	316	struct netlink_dump_control c = {
	317	.dump = unix_diag_dump,
	318	};
51d7cccf	319	return netlink_dump_start(net->diag_nlsk, skb, h, &c);
80d326fa	320	} else
b61bb019	321	return unix_diag_get_exact(skb, h, nlmsg_data(h));
22931d3b PE	322	}
22931d3b PE	323
8dcf01fc	324	static const struct sock_diag_handler unix_diag_handler = {
22931d3b PE	325	.family = AF_UNIX,
	326	.dump = unix_diag_handler_dump,
	327	};
	328
	329	static int __init unix_diag_init(void)
	330	{
	331	return sock_diag_register(&unix_diag_handler);
	332	}
	333
	334	static void __exit unix_diag_exit(void)
	335	{
	336	sock_diag_unregister(&unix_diag_handler);
	337	}
	338
	339	module_init(unix_diag_init);
	340	module_exit(unix_diag_exit);
	341	MODULE_LICENSE("GPL");
	342	MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 1 /* AF_LOCAL */);