[linux-block.git] / net / smc / smc_diag.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Shared Memory Communications over RDMA (SMC-R) and RoCE
 *
 * Monitoring SMC transport protocol sockets
 *
 * Copyright IBM Corp. 2016
 *
 * Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/sock_diag.h>
#include <linux/inet_diag.h>
#include <linux/smc_diag.h>
#include <net/netlink.h>
#include <net/smc.h>

#include "smc.h"
#include "smc_core.h"
#include "smc_ism.h"

struct smc_diag_dump_ctx {
	int pos[2];
};

static struct smc_diag_dump_ctx *smc_dump_context(struct netlink_callback *cb)
{
	return (struct smc_diag_dump_ctx *)cb->ctx;
}

static void smc_diag_msg_common_fill(struct smc_diag_msg *r, struct sock *sk)
{
	struct smc_sock *smc = smc_sk(sk);

	memset(r, 0, sizeof(*r));
	r->diag_family = sk->sk_family;
	sock_diag_save_cookie(sk, r->id.idiag_cookie);
	if (!smc->clcsock)
		return;
	r->id.idiag_sport = htons(smc->clcsock->sk->sk_num);
	r->id.idiag_dport = smc->clcsock->sk->sk_dport;
	r->id.idiag_if = smc->clcsock->sk->sk_bound_dev_if;
	if (sk->sk_protocol == SMCPROTO_SMC) {
		r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr;
		r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr;
#if IS_ENABLED(CONFIG_IPV6)
	} else if (sk->sk_protocol == SMCPROTO_SMC6) {
		memcpy(&r->id.idiag_src, &smc->clcsock->sk->sk_v6_rcv_saddr,
		       sizeof(smc->clcsock->sk->sk_v6_rcv_saddr));
		memcpy(&r->id.idiag_dst, &smc->clcsock->sk->sk_v6_daddr,
		       sizeof(smc->clcsock->sk->sk_v6_daddr));
#endif
	}
}

static int smc_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
				   struct smc_diag_msg *r,
				   struct user_namespace *user_ns)
{
	if (nla_put_u8(skb, SMC_DIAG_SHUTDOWN, sk->sk_shutdown))
		return 1;

	r->diag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
	r->diag_inode = sock_i_ino(sk);
	return 0;
}

static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
			   struct netlink_callback *cb,
			   const struct smc_diag_req *req,
			   struct nlattr *bc)
{
	struct smc_sock *smc = smc_sk(sk);
	struct smc_diag_fallback fallback;
	struct user_namespace *user_ns;
	struct smc_diag_msg *r;
	struct nlmsghdr *nlh;

	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
			cb->nlh->nlmsg_type, sizeof(*r), NLM_F_MULTI);
	if (!nlh)
		return -EMSGSIZE;

	r = nlmsg_data(nlh);
	smc_diag_msg_common_fill(r, sk);
	r->diag_state = sk->sk_state;
	if (smc->use_fallback)
		r->diag_mode = SMC_DIAG_MODE_FALLBACK_TCP;
	else if (smc_conn_lgr_valid(&smc->conn) && smc->conn.lgr->is_smcd)
		r->diag_mode = SMC_DIAG_MODE_SMCD;
	else
		r->diag_mode = SMC_DIAG_MODE_SMCR;
	user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
	if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
		goto errout;

	fallback.reason = smc->fallback_rsn;
	fallback.peer_diagnosis = smc->peer_diagnosis;
	if (nla_put(skb, SMC_DIAG_FALLBACK, sizeof(fallback), &fallback) < 0)
		goto errout;

	if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) &&
	    smc->conn.alert_token_local) {
		struct smc_connection *conn = &smc->conn;
		struct smc_diag_conninfo cinfo = {
			.token = conn->alert_token_local,
			.sndbuf_size = conn->sndbuf_desc ?
				conn->sndbuf_desc->len : 0,
			.rmbe_size = conn->rmb_desc ? conn->rmb_desc->len : 0,
			.peer_rmbe_size = conn->peer_rmbe_size,

			.rx_prod.wrap = conn->local_rx_ctrl.prod.wrap,
			.rx_prod.count = conn->local_rx_ctrl.prod.count,
			.rx_cons.wrap = conn->local_rx_ctrl.cons.wrap,
			.rx_cons.count = conn->local_rx_ctrl.cons.count,

			.tx_prod.wrap = conn->local_tx_ctrl.prod.wrap,
			.tx_prod.count = conn->local_tx_ctrl.prod.count,
			.tx_cons.wrap = conn->local_tx_ctrl.cons.wrap,
			.tx_cons.count = conn->local_tx_ctrl.cons.count,

			.tx_prod_flags =
				*(u8 *)&conn->local_tx_ctrl.prod_flags,
			.tx_conn_state_flags =
				*(u8 *)&conn->local_tx_ctrl.conn_state_flags,
			.rx_prod_flags = *(u8 *)&conn->local_rx_ctrl.prod_flags,
			.rx_conn_state_flags =
				*(u8 *)&conn->local_rx_ctrl.conn_state_flags,

			.tx_prep.wrap = conn->tx_curs_prep.wrap,
			.tx_prep.count = conn->tx_curs_prep.count,
			.tx_sent.wrap = conn->tx_curs_sent.wrap,
			.tx_sent.count = conn->tx_curs_sent.count,
			.tx_fin.wrap = conn->tx_curs_fin.wrap,
			.tx_fin.count = conn->tx_curs_fin.count,
		};

		if (nla_put(skb, SMC_DIAG_CONNINFO, sizeof(cinfo), &cinfo) < 0)
			goto errout;
	}

	if (smc_conn_lgr_valid(&smc->conn) && !smc->conn.lgr->is_smcd &&
	    (req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) &&
	    !list_empty(&smc->conn.lgr->list)) {
		struct smc_link *link = smc->conn.lnk;

		struct smc_diag_lgrinfo linfo = {
			.role = smc->conn.lgr->role,
			.lnk[0].ibport = link->ibport,
			.lnk[0].link_id = link->link_id,
		};

		memcpy(linfo.lnk[0].ibname, link->smcibdev->ibdev->name,
		       sizeof(link->smcibdev->ibdev->name));
		smc_gid_be16_convert(linfo.lnk[0].gid, link->gid);
		smc_gid_be16_convert(linfo.lnk[0].peer_gid, link->peer_gid);

		if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 0)
			goto errout;
	}
	if (smc_conn_lgr_valid(&smc->conn) && smc->conn.lgr->is_smcd &&
	    (req->diag_ext & (1 << (SMC_DIAG_DMBINFO - 1))) &&
	    !list_empty(&smc->conn.lgr->list) && smc->conn.rmb_desc) {
		struct smc_connection *conn = &smc->conn;
		struct smcd_diag_dmbinfo dinfo;
		struct smcd_dev *smcd = conn->lgr->smcd;
		struct smcd_gid smcd_gid;

		memset(&dinfo, 0, sizeof(dinfo));

		dinfo.linkid = *((u32 *)conn->lgr->id);
		dinfo.peer_gid = conn->lgr->peer_gid.gid;
		dinfo.peer_gid_ext = conn->lgr->peer_gid.gid_ext;
		smcd->ops->get_local_gid(smcd, &smcd_gid);
		dinfo.my_gid = smcd_gid.gid;
		dinfo.my_gid_ext = smcd_gid.gid_ext;
		dinfo.token = conn->rmb_desc->token;
		dinfo.peer_token = conn->peer_token;

		if (nla_put(skb, SMC_DIAG_DMBINFO, sizeof(dinfo), &dinfo) < 0)
			goto errout;
	}

	nlmsg_end(skb, nlh);
	return 0;

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

static int smc_diag_dump_proto(struct proto *prot, struct sk_buff *skb,
			       struct netlink_callback *cb, int p_type)
{
	struct smc_diag_dump_ctx *cb_ctx = smc_dump_context(cb);
	struct net *net = sock_net(skb->sk);
	int snum = cb_ctx->pos[p_type];
	struct nlattr *bc = NULL;
	struct hlist_head *head;
	int rc = 0, num = 0;
	struct sock *sk;

	read_lock(&prot->h.smc_hash->lock);
	head = &prot->h.smc_hash->ht;
	if (hlist_empty(head))
		goto out;

	sk_for_each(sk, head) {
		if (!net_eq(sock_net(sk), net))
			continue;
		if (num < snum)
			goto next;
		rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
		if (rc < 0)
			goto out;
next:
		num++;
	}

out:
	read_unlock(&prot->h.smc_hash->lock);
	cb_ctx->pos[p_type] = num;
	return rc;
}

static int smc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
	int rc = 0;

	rc = smc_diag_dump_proto(&smc_proto, skb, cb, SMCPROTO_SMC);
	if (!rc)
		smc_diag_dump_proto(&smc_proto6, skb, cb, SMCPROTO_SMC6);
	return skb->len;
}

static int smc_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
{
	struct net *net = sock_net(skb->sk);

	if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
	    h->nlmsg_flags & NLM_F_DUMP) {
		{
			struct netlink_dump_control c = {
				.dump = smc_diag_dump,
				.min_dump_alloc = SKB_WITH_OVERHEAD(32768),
			};
			return netlink_dump_start(net->diag_nlsk, skb, h, &c);
		}
	}
	return 0;
}

static const struct sock_diag_handler smc_diag_handler = {
	.owner = THIS_MODULE,
	.family = AF_SMC,
	.dump = smc_diag_handler_dump,
};

static int __init smc_diag_init(void)
{
	return sock_diag_register(&smc_diag_handler);
}

static void __exit smc_diag_exit(void)
{
	sock_diag_unregister(&smc_diag_handler);
}

module_init(smc_diag_init);
module_exit(smc_diag_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SMC socket monitoring via SOCK_DIAG");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);
MODULE_ALIAS_GENL_FAMILY(SMCR_GENL_FAMILY_NAME);
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
f16a7dd5 UB	2	/*
	3	* Shared Memory Communications over RDMA (SMC-R) and RoCE
	4	*
	5	* Monitoring SMC transport protocol sockets
	6	*
	7	* Copyright IBM Corp. 2016
	8	*
	9	* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/module.h>
	14	#include <linux/types.h>
	15	#include <linux/init.h>
	16	#include <linux/sock_diag.h>
	17	#include <linux/inet_diag.h>
	18	#include <linux/smc_diag.h>
	19	#include <net/netlink.h>
	20	#include <net/smc.h>
	21
	22	#include "smc.h"
	23	#include "smc_core.h"
b40584d1	24	#include "smc_ism.h"
f16a7dd5	25
8418cb40 GG	26	struct smc_diag_dump_ctx {
	27	int pos[2];
	28	};
	29
	30	static struct smc_diag_dump_ctx smc_dump_context(struct netlink_callback cb)
	31	{
	32	return (struct smc_diag_dump_ctx *)cb->ctx;
	33	}
	34
f16a7dd5 UB	35	static void smc_diag_msg_common_fill(struct smc_diag_msg r, struct sock sk)
	36	{
	37	struct smc_sock *smc = smc_sk(sk);
	38
457fed77	39	memset(r, 0, sizeof(*r));
232dc8ef	40	r->diag_family = sk->sk_family;
457fed77	41	sock_diag_save_cookie(sk, r->id.idiag_cookie);
f16a7dd5 UB	42	if (!smc->clcsock)
	43	return;
	44	r->id.idiag_sport = htons(smc->clcsock->sk->sk_num);
	45	r->id.idiag_dport = smc->clcsock->sk->sk_dport;
	46	r->id.idiag_if = smc->clcsock->sk->sk_bound_dev_if;
ed75986f	47	if (sk->sk_protocol == SMCPROTO_SMC) {
ed75986f KG	48	r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr;
	49	r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr;
	50	#if IS_ENABLED(CONFIG_IPV6)
	51	} else if (sk->sk_protocol == SMCPROTO_SMC6) {
ed75986f KG	52	memcpy(&r->id.idiag_src, &smc->clcsock->sk->sk_v6_rcv_saddr,
	53	sizeof(smc->clcsock->sk->sk_v6_rcv_saddr));
	54	memcpy(&r->id.idiag_dst, &smc->clcsock->sk->sk_v6_daddr,
	55	sizeof(smc->clcsock->sk->sk_v6_daddr));
	56	#endif
	57	}
f16a7dd5 UB	58	}
	59
	60	static int smc_diag_msg_attrs_fill(struct sock sk, struct sk_buff skb,
	61	struct smc_diag_msg *r,
	62	struct user_namespace *user_ns)
	63	{
	64	if (nla_put_u8(skb, SMC_DIAG_SHUTDOWN, sk->sk_shutdown))
	65	return 1;
	66
	67	r->diag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
	68	r->diag_inode = sock_i_ino(sk);
	69	return 0;
	70	}
	71
	72	static int __smc_diag_dump(struct sock sk, struct sk_buff skb,
	73	struct netlink_callback *cb,
	74	const struct smc_diag_req *req,
	75	struct nlattr *bc)
	76	{
	77	struct smc_sock *smc = smc_sk(sk);
603cc149	78	struct smc_diag_fallback fallback;
f16a7dd5 UB	79	struct user_namespace *user_ns;
	80	struct smc_diag_msg *r;
	81	struct nlmsghdr *nlh;
	82
	83	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
	84	cb->nlh->nlmsg_type, sizeof(*r), NLM_F_MULTI);
	85	if (!nlh)
	86	return -EMSGSIZE;
	87
	88	r = nlmsg_data(nlh);
	89	smc_diag_msg_common_fill(r, sk);
	90	r->diag_state = sk->sk_state;
c601171d KG	91	if (smc->use_fallback)
c601171d KG	92	r->diag_mode = SMC_DIAG_MODE_FALLBACK_TCP;
ea89c6c0	93	else if (smc_conn_lgr_valid(&smc->conn) && smc->conn.lgr->is_smcd)
c601171d KG	94	r->diag_mode = SMC_DIAG_MODE_SMCD;
	95	else
	96	r->diag_mode = SMC_DIAG_MODE_SMCR;
f16a7dd5 UB	97	user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
	98	if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
	99	goto errout;
	100
603cc149 KG	101	fallback.reason = smc->fallback_rsn;
	102	fallback.peer_diagnosis = smc->peer_diagnosis;
	103	if (nla_put(skb, SMC_DIAG_FALLBACK, sizeof(fallback), &fallback) < 0)
	104	goto errout;
	105
1a0a04c7 UB	106	if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) &&
1a0a04c7 UB	107	smc->conn.alert_token_local) {
f16a7dd5 UB	108	struct smc_connection *conn = &smc->conn;
	109	struct smc_diag_conninfo cinfo = {
	110	.token = conn->alert_token_local,
69cb7dc0 HW	111	.sndbuf_size = conn->sndbuf_desc ?
	112	conn->sndbuf_desc->len : 0,
	113	.rmbe_size = conn->rmb_desc ? conn->rmb_desc->len : 0,
f16a7dd5 UB	114	.peer_rmbe_size = conn->peer_rmbe_size,
	115
	116	.rx_prod.wrap = conn->local_rx_ctrl.prod.wrap,
	117	.rx_prod.count = conn->local_rx_ctrl.prod.count,
	118	.rx_cons.wrap = conn->local_rx_ctrl.cons.wrap,
	119	.rx_cons.count = conn->local_rx_ctrl.cons.count,
	120
	121	.tx_prod.wrap = conn->local_tx_ctrl.prod.wrap,
	122	.tx_prod.count = conn->local_tx_ctrl.prod.count,
	123	.tx_cons.wrap = conn->local_tx_ctrl.cons.wrap,
	124	.tx_cons.count = conn->local_tx_ctrl.cons.count,
	125
	126	.tx_prod_flags =
	127	(u8 )&conn->local_tx_ctrl.prod_flags,
	128	.tx_conn_state_flags =
	129	(u8 )&conn->local_tx_ctrl.conn_state_flags,
	130	.rx_prod_flags = (u8 )&conn->local_rx_ctrl.prod_flags,
	131	.rx_conn_state_flags =
	132	(u8 )&conn->local_rx_ctrl.conn_state_flags,
	133
	134	.tx_prep.wrap = conn->tx_curs_prep.wrap,
	135	.tx_prep.count = conn->tx_curs_prep.count,
	136	.tx_sent.wrap = conn->tx_curs_sent.wrap,
	137	.tx_sent.count = conn->tx_curs_sent.count,
	138	.tx_fin.wrap = conn->tx_curs_fin.wrap,
	139	.tx_fin.count = conn->tx_curs_fin.count,
	140	};
	141
	142	if (nla_put(skb, SMC_DIAG_CONNINFO, sizeof(cinfo), &cinfo) < 0)
	143	goto errout;
	144	}
	145
ea89c6c0	146	if (smc_conn_lgr_valid(&smc->conn) && !smc->conn.lgr->is_smcd &&
c6ba7c9b	147	(req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) &&
1a0a04c7	148	!list_empty(&smc->conn.lgr->list)) {
79d39fc5	149	struct smc_link *link = smc->conn.lnk;
79d39fc5	150
f16a7dd5 UB	151	struct smc_diag_lgrinfo linfo = {
f16a7dd5 UB	152	.role = smc->conn.lgr->role,
79d39fc5 TL	153	.lnk[0].ibport = link->ibport,
79d39fc5 TL	154	.lnk[0].link_id = link->link_id,
f16a7dd5 UB	155	};
f16a7dd5 UB	156
9dbe086c	157	memcpy(linfo.lnk[0].ibname, link->smcibdev->ibdev->name,
79d39fc5 TL	158	sizeof(link->smcibdev->ibdev->name));
	159	smc_gid_be16_convert(linfo.lnk[0].gid, link->gid);
	160	smc_gid_be16_convert(linfo.lnk[0].peer_gid, link->peer_gid);
f16a7dd5 UB	161
	162	if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 0)
	163	goto errout;
	164	}
ea89c6c0	165	if (smc_conn_lgr_valid(&smc->conn) && smc->conn.lgr->is_smcd &&
4b1b7d3b	166	(req->diag_ext & (1 << (SMC_DIAG_DMBINFO - 1))) &&
dbc153fd	167	!list_empty(&smc->conn.lgr->list) && smc->conn.rmb_desc) {
4b1b7d3b	168	struct smc_connection *conn = &smc->conn;
ce51f63e	169	struct smcd_diag_dmbinfo dinfo;
9de4df7b	170	struct smcd_dev *smcd = conn->lgr->smcd;
b40584d1	171	struct smcd_gid smcd_gid;
ce51f63e PY	172
	173	memset(&dinfo, 0, sizeof(dinfo));
	174
	175	dinfo.linkid = ((u32 )conn->lgr->id);
b40584d1	176	dinfo.peer_gid = conn->lgr->peer_gid.gid;
01fd1617	177	dinfo.peer_gid_ext = conn->lgr->peer_gid.gid_ext;
b40584d1 WG	178	smcd->ops->get_local_gid(smcd, &smcd_gid);
b40584d1 WG	179	dinfo.my_gid = smcd_gid.gid;
01fd1617	180	dinfo.my_gid_ext = smcd_gid.gid_ext;
ce51f63e PY	181	dinfo.token = conn->rmb_desc->token;
ce51f63e PY	182	dinfo.peer_token = conn->peer_token;
4b1b7d3b HW	183
	184	if (nla_put(skb, SMC_DIAG_DMBINFO, sizeof(dinfo), &dinfo) < 0)
	185	goto errout;
	186	}
f16a7dd5 UB	187
	188	nlmsg_end(skb, nlh);
	189	return 0;
	190
	191	errout:
	192	nlmsg_cancel(skb, nlh);
	193	return -EMSGSIZE;
	194	}
	195
ed75986f	196	static int smc_diag_dump_proto(struct proto prot, struct sk_buff skb,
8418cb40	197	struct netlink_callback *cb, int p_type)
f16a7dd5	198	{
8418cb40	199	struct smc_diag_dump_ctx *cb_ctx = smc_dump_context(cb);
f16a7dd5	200	struct net *net = sock_net(skb->sk);
8418cb40	201	int snum = cb_ctx->pos[p_type];
f16a7dd5 UB	202	struct nlattr *bc = NULL;
f16a7dd5 UB	203	struct hlist_head *head;
8418cb40	204	int rc = 0, num = 0;
f16a7dd5	205	struct sock *sk;
f16a7dd5	206
ed75986f KG	207	read_lock(&prot->h.smc_hash->lock);
ed75986f KG	208	head = &prot->h.smc_hash->ht;
f16a7dd5 UB	209	if (hlist_empty(head))
	210	goto out;
	211
	212	sk_for_each(sk, head) {
	213	if (!net_eq(sock_net(sk), net))
	214	continue;
8418cb40 GG	215	if (num < snum)
8418cb40 GG	216	goto next;
f16a7dd5	217	rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
8418cb40 GG	218	if (rc < 0)
	219	goto out;
	220	next:
	221	num++;
f16a7dd5 UB	222	}
	223
	224	out:
ed75986f	225	read_unlock(&prot->h.smc_hash->lock);
8418cb40	226	cb_ctx->pos[p_type] = num;
ed75986f KG	227	return rc;
	228	}
	229
	230	static int smc_diag_dump(struct sk_buff skb, struct netlink_callback cb)
	231	{
	232	int rc = 0;
	233
8418cb40	234	rc = smc_diag_dump_proto(&smc_proto, skb, cb, SMCPROTO_SMC);
ed75986f	235	if (!rc)
8418cb40 GG	236	smc_diag_dump_proto(&smc_proto6, skb, cb, SMCPROTO_SMC6);
8418cb40 GG	237	return skb->len;
f16a7dd5 UB	238	}
	239
	240	static int smc_diag_handler_dump(struct sk_buff skb, struct nlmsghdr h)
	241	{
	242	struct net *net = sock_net(skb->sk);
	243
	244	if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
	245	h->nlmsg_flags & NLM_F_DUMP) {
	246	{
	247	struct netlink_dump_control c = {
	248	.dump = smc_diag_dump,
	249	.min_dump_alloc = SKB_WITH_OVERHEAD(32768),
	250	};
	251	return netlink_dump_start(net->diag_nlsk, skb, h, &c);
	252	}
	253	}
	254	return 0;
	255	}
	256
	257	static const struct sock_diag_handler smc_diag_handler = {
114b4bb1	258	.owner = THIS_MODULE,
f16a7dd5 UB	259	.family = AF_SMC,
	260	.dump = smc_diag_handler_dump,
	261	};
	262
	263	static int __init smc_diag_init(void)
	264	{
	265	return sock_diag_register(&smc_diag_handler);
	266	}
	267
	268	static void __exit smc_diag_exit(void)
	269	{
	270	sock_diag_unregister(&smc_diag_handler);
	271	}
	272
	273	module_init(smc_diag_init);
	274	module_exit(smc_diag_exit);
	275	MODULE_LICENSE("GPL");
938dbead	276	MODULE_DESCRIPTION("SMC socket monitoring via SOCK_DIAG");
f16a7dd5	277	MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);
28ec53f3	278	MODULE_ALIAS_GENL_FAMILY(SMCR_GENL_FAMILY_NAME);