[mirror_ubuntu-artful-kernel.git] / net / smc / smc_diag.c

/*
 * 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);

	r->diag_family = sk->sk_family;
	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);
	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;
}

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.lgr) {
		struct smc_connection *conn = &smc->conn;
		struct smc_diag_conninfo cinfo = {
			.token = conn->alert_token_local,
			.sndbuf_size = conn->sndbuf_size,
			.rmbe_size = conn->rmbe_size,
			.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) {
		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(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(&smc_proto.h.smc_hash->lock);
	head = &smc_proto.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(&smc_proto.h.smc_hash->lock);
	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 */);
Commit	Line	Data
f16a7dd5 UB	1	/*
	2	* Shared Memory Communications over RDMA (SMC-R) and RoCE
	3	*
	4	* Monitoring SMC transport protocol sockets
	5	*
	6	* Copyright IBM Corp. 2016
	7	*
	8	* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/types.h>
	14	#include <linux/init.h>
	15	#include <linux/sock_diag.h>
	16	#include <linux/inet_diag.h>
	17	#include <linux/smc_diag.h>
	18	#include <net/netlink.h>
	19	#include <net/smc.h>
	20
	21	#include "smc.h"
	22	#include "smc_core.h"
	23
	24	static void smc_gid_be16_convert(__u8 buf, u8 gid_raw)
	25	{
	26	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
	27	be16_to_cpu(((__be16 *)gid_raw)[0]),
	28	be16_to_cpu(((__be16 *)gid_raw)[1]),
	29	be16_to_cpu(((__be16 *)gid_raw)[2]),
	30	be16_to_cpu(((__be16 *)gid_raw)[3]),
	31	be16_to_cpu(((__be16 *)gid_raw)[4]),
	32	be16_to_cpu(((__be16 *)gid_raw)[5]),
	33	be16_to_cpu(((__be16 *)gid_raw)[6]),
	34	be16_to_cpu(((__be16 *)gid_raw)[7]));
	35	}
	36
	37	static void smc_diag_msg_common_fill(struct smc_diag_msg r, struct sock sk)
	38	{
	39	struct smc_sock *smc = smc_sk(sk);
	40
	41	r->diag_family = sk->sk_family;
	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;
	47	sock_diag_save_cookie(sk, r->id.idiag_cookie);
	48	memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
	49	memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
	50	r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr;
	51	r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr;
	52	}
	53
	54	static int smc_diag_msg_attrs_fill(struct sock sk, struct sk_buff skb,
	55	struct smc_diag_msg *r,
	56	struct user_namespace *user_ns)
	57	{
	58	if (nla_put_u8(skb, SMC_DIAG_SHUTDOWN, sk->sk_shutdown))
	59	return 1;
	60
	61	r->diag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
	62	r->diag_inode = sock_i_ino(sk);
	63	return 0;
	64	}
65
66	static int __smc_diag_dump(struct sock sk, struct sk_buff skb,
67	struct netlink_callback *cb,
68	const struct smc_diag_req *req,
69	struct nlattr *bc)
70	{
71	struct smc_sock *smc = smc_sk(sk);
72	struct user_namespace *user_ns;
73	struct smc_diag_msg *r;
74	struct nlmsghdr *nlh;
75
76	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
77	cb->nlh->nlmsg_type, sizeof(*r), NLM_F_MULTI);
78	if (!nlh)
79	return -EMSGSIZE;
80
81	r = nlmsg_data(nlh);
82	smc_diag_msg_common_fill(r, sk);
83	r->diag_state = sk->sk_state;
84	r->diag_fallback = smc->use_fallback;
85	user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
86	if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
87	goto errout;
88
89	if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) && smc->conn.lgr) {
90	struct smc_connection *conn = &smc->conn;
91	struct smc_diag_conninfo cinfo = {
92	.token = conn->alert_token_local,
93	.sndbuf_size = conn->sndbuf_size,
94	.rmbe_size = conn->rmbe_size,
95	.peer_rmbe_size = conn->peer_rmbe_size,
96
97	.rx_prod.wrap = conn->local_rx_ctrl.prod.wrap,
98	.rx_prod.count = conn->local_rx_ctrl.prod.count,
99	.rx_cons.wrap = conn->local_rx_ctrl.cons.wrap,
100	.rx_cons.count = conn->local_rx_ctrl.cons.count,
101
102	.tx_prod.wrap = conn->local_tx_ctrl.prod.wrap,
103	.tx_prod.count = conn->local_tx_ctrl.prod.count,
104	.tx_cons.wrap = conn->local_tx_ctrl.cons.wrap,
105	.tx_cons.count = conn->local_tx_ctrl.cons.count,
106
107	.tx_prod_flags =
108	(u8 )&conn->local_tx_ctrl.prod_flags,
109	.tx_conn_state_flags =
110	(u8 )&conn->local_tx_ctrl.conn_state_flags,
111	.rx_prod_flags = (u8 )&conn->local_rx_ctrl.prod_flags,
112	.rx_conn_state_flags =
113	(u8 )&conn->local_rx_ctrl.conn_state_flags,
114
115	.tx_prep.wrap = conn->tx_curs_prep.wrap,
116	.tx_prep.count = conn->tx_curs_prep.count,
117	.tx_sent.wrap = conn->tx_curs_sent.wrap,
118	.tx_sent.count = conn->tx_curs_sent.count,
119	.tx_fin.wrap = conn->tx_curs_fin.wrap,
120	.tx_fin.count = conn->tx_curs_fin.count,
121	};
122
123	if (nla_put(skb, SMC_DIAG_CONNINFO, sizeof(cinfo), &cinfo) < 0)
124	goto errout;
125	}
126
127	if ((req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) && smc->conn.lgr) {
128	struct smc_diag_lgrinfo linfo = {
129	.role = smc->conn.lgr->role,
130	.lnk[0].ibport = smc->conn.lgr->lnk[0].ibport,
131	.lnk[0].link_id = smc->conn.lgr->lnk[0].link_id,
132	};
133
134	memcpy(linfo.lnk[0].ibname,
135	smc->conn.lgr->lnk[0].smcibdev->ibdev->name,
136	sizeof(smc->conn.lgr->lnk[0].smcibdev->ibdev->name));
137	smc_gid_be16_convert(linfo.lnk[0].gid,
138	smc->conn.lgr->lnk[0].gid.raw);
139	smc_gid_be16_convert(linfo.lnk[0].peer_gid,
140	smc->conn.lgr->lnk[0].peer_gid);
141
142	if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 0)
143	goto errout;
144	}
145
146	nlmsg_end(skb, nlh);
147	return 0;
148
149	errout:
150	nlmsg_cancel(skb, nlh);
151	return -EMSGSIZE;
152	}
153
154	static int smc_diag_dump(struct sk_buff skb, struct netlink_callback cb)
155	{
156	struct net *net = sock_net(skb->sk);
157	struct nlattr *bc = NULL;
158	struct hlist_head *head;
159	struct sock *sk;
160	int rc = 0;
161
162	read_lock(&smc_proto.h.smc_hash->lock);
163	head = &smc_proto.h.smc_hash->ht;
164	if (hlist_empty(head))
165	goto out;
166
167	sk_for_each(sk, head) {
168	if (!net_eq(sock_net(sk), net))
169	continue;
170	rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
171	if (rc)
172	break;
173	}
174
175	out:
176	read_unlock(&smc_proto.h.smc_hash->lock);
177	return rc;
178	}
179
180	static int smc_diag_handler_dump(struct sk_buff skb, struct nlmsghdr h)
181	{
182	struct net *net = sock_net(skb->sk);
183
184	if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
185	h->nlmsg_flags & NLM_F_DUMP) {
186	{
187	struct netlink_dump_control c = {
188	.dump = smc_diag_dump,
189	.min_dump_alloc = SKB_WITH_OVERHEAD(32768),
190	};
191	return netlink_dump_start(net->diag_nlsk, skb, h, &c);
192	}
193	}
194	return 0;
195	}
196
197	static const struct sock_diag_handler smc_diag_handler = {
198	.family = AF_SMC,
199	.dump = smc_diag_handler_dump,
200	};
201
202	static int __init smc_diag_init(void)
203	{
204	return sock_diag_register(&smc_diag_handler);
205	}
206
207	static void __exit smc_diag_exit(void)
208	{
209	sock_diag_unregister(&smc_diag_handler);
210	}
211
212	module_init(smc_diag_init);
213	module_exit(smc_diag_exit);
214	MODULE_LICENSE("GPL");
215	MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);