net/smc/smc_diag.c - kernel/msm-5.4 - Gitiles

 /*
  * 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"

 static void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
 {
 	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
 		be16_to_cpu(((__be16 *)gid_raw)[0]),
 		be16_to_cpu(((__be16 *)gid_raw)[1]),
 		be16_to_cpu(((__be16 *)gid_raw)[2]),
 		be16_to_cpu(((__be16 *)gid_raw)[3]),
 		be16_to_cpu(((__be16 *)gid_raw)[4]),
 		be16_to_cpu(((__be16 *)gid_raw)[5]),
 		be16_to_cpu(((__be16 *)gid_raw)[6]),
 		be16_to_cpu(((__be16 *)gid_raw)[7]));
 }

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

 	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;
 	sock_diag_save_cookie(sk, r->id.idiag_cookie);
 	if (sk->sk_protocol == SMCPROTO_SMC) {
 		r->diag_family = PF_INET;
 		memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
 		memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
 		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) {
 		r->diag_family = PF_INET6;
 		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 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;
 	r->diag_fallback = smc->use_fallback;
 	user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
 	if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
 		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 ((req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) && smc->conn.lgr &&
 	    !list_empty(&smc->conn.lgr->list)) {
 		struct smc_diag_lgrinfo linfo = {
 			.role = smc->conn.lgr->role,
 			.lnk[0].ibport = smc->conn.lgr->lnk[0].ibport,
 			.lnk[0].link_id = smc->conn.lgr->lnk[0].link_id,
 		};

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

 		if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 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)
 {
 	struct net *net = sock_net(skb->sk);
 	struct nlattr *bc = NULL;
 	struct hlist_head *head;
 	struct sock *sk;
 	int rc = 0;

 	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;
 		rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
 		if (rc)
 			break;
 	}

 out:
 	read_unlock(&prot->h.smc_hash->lock);
 	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);
 	if (!rc)
 		rc = smc_diag_dump_proto(&smc_proto6, skb, cb);
 	return rc;
 }

 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 = {
 	.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_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);
	/*
	* 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"

	static void smc_gid_be16_convert(__u8 buf, u8 gid_raw)
	{
	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
	be16_to_cpu(((__be16 *)gid_raw)[0]),
	be16_to_cpu(((__be16 *)gid_raw)[1]),
	be16_to_cpu(((__be16 *)gid_raw)[2]),
	be16_to_cpu(((__be16 *)gid_raw)[3]),
	be16_to_cpu(((__be16 *)gid_raw)[4]),
	be16_to_cpu(((__be16 *)gid_raw)[5]),
	be16_to_cpu(((__be16 *)gid_raw)[6]),
	be16_to_cpu(((__be16 *)gid_raw)[7]));
	}

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

	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;
	sock_diag_save_cookie(sk, r->id.idiag_cookie);
	if (sk->sk_protocol == SMCPROTO_SMC) {
	r->diag_family = PF_INET;
	memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
	memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
	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) {
	r->diag_family = PF_INET6;
	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 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;
	r->diag_fallback = smc->use_fallback;
	user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
	if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
	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 ((req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) && smc->conn.lgr &&
	!list_empty(&smc->conn.lgr->list)) {
	struct smc_diag_lgrinfo linfo = {
	.role = smc->conn.lgr->role,
	.lnk[0].ibport = smc->conn.lgr->lnk[0].ibport,
	.lnk[0].link_id = smc->conn.lgr->lnk[0].link_id,
	};

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

	if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 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)
	{
	struct net *net = sock_net(skb->sk);
	struct nlattr *bc = NULL;
	struct hlist_head *head;
	struct sock *sk;
	int rc = 0;

	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;
	rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
	if (rc)
	break;
	}

	out:
	read_unlock(&prot->h.smc_hash->lock);
	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);
	if (!rc)
	rc = smc_diag_dump_proto(&smc_proto6, skb, cb);
	return rc;
	}

	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 = {
	.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_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);