Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Shared Memory Communications over RDMA (SMC-R) and RoCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Monitoring SMC transport protocol sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright IBM Corp. 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/sock_diag.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/inet_diag.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/smc_diag.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <net/smc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include "smc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include "smc_core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) struct smc_diag_dump_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	int pos[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static struct smc_diag_dump_ctx *smc_dump_context(struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	return (struct smc_diag_dump_ctx *)cb->ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		be16_to_cpu(((__be16 *)gid_raw)[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		be16_to_cpu(((__be16 *)gid_raw)[1]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		be16_to_cpu(((__be16 *)gid_raw)[2]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		be16_to_cpu(((__be16 *)gid_raw)[3]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		be16_to_cpu(((__be16 *)gid_raw)[4]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		be16_to_cpu(((__be16 *)gid_raw)[5]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		be16_to_cpu(((__be16 *)gid_raw)[6]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		be16_to_cpu(((__be16 *)gid_raw)[7]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) static void smc_diag_msg_common_fill(struct smc_diag_msg *r, struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct smc_sock *smc = smc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	memset(r, 0, sizeof(*r));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	r->diag_family = sk->sk_family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	sock_diag_save_cookie(sk, r->id.idiag_cookie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (!smc->clcsock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	r->id.idiag_sport = htons(smc->clcsock->sk->sk_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	r->id.idiag_dport = smc->clcsock->sk->sk_dport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	r->id.idiag_if = smc->clcsock->sk->sk_bound_dev_if;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	if (sk->sk_protocol == SMCPROTO_SMC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	} else if (sk->sk_protocol == SMCPROTO_SMC6) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		memcpy(&r->id.idiag_src, &smc->clcsock->sk->sk_v6_rcv_saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		       sizeof(smc->clcsock->sk->sk_v6_rcv_saddr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		memcpy(&r->id.idiag_dst, &smc->clcsock->sk->sk_v6_daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		       sizeof(smc->clcsock->sk->sk_v6_daddr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static int smc_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 				   struct smc_diag_msg *r,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 				   struct user_namespace *user_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (nla_put_u8(skb, SMC_DIAG_SHUTDOWN, sk->sk_shutdown))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	r->diag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	r->diag_inode = sock_i_ino(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			   struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			   const struct smc_diag_req *req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			   struct nlattr *bc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct smc_sock *smc = smc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct smc_diag_fallback fallback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct user_namespace *user_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct smc_diag_msg *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			cb->nlh->nlmsg_type, sizeof(*r), NLM_F_MULTI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	r = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	smc_diag_msg_common_fill(r, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	r->diag_state = sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (smc->use_fallback)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		r->diag_mode = SMC_DIAG_MODE_FALLBACK_TCP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	else if (smc->conn.lgr && smc->conn.lgr->is_smcd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		r->diag_mode = SMC_DIAG_MODE_SMCD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		r->diag_mode = SMC_DIAG_MODE_SMCR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	fallback.reason = smc->fallback_rsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	fallback.peer_diagnosis = smc->peer_diagnosis;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (nla_put(skb, SMC_DIAG_FALLBACK, sizeof(fallback), &fallback) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	    smc->conn.alert_token_local) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		struct smc_connection *conn = &smc->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		struct smc_diag_conninfo cinfo = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			.token = conn->alert_token_local,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			.sndbuf_size = conn->sndbuf_desc ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 				conn->sndbuf_desc->len : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			.rmbe_size = conn->rmb_desc ? conn->rmb_desc->len : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			.peer_rmbe_size = conn->peer_rmbe_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			.rx_prod.wrap = conn->local_rx_ctrl.prod.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			.rx_prod.count = conn->local_rx_ctrl.prod.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			.rx_cons.wrap = conn->local_rx_ctrl.cons.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			.rx_cons.count = conn->local_rx_ctrl.cons.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			.tx_prod.wrap = conn->local_tx_ctrl.prod.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			.tx_prod.count = conn->local_tx_ctrl.prod.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			.tx_cons.wrap = conn->local_tx_ctrl.cons.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			.tx_cons.count = conn->local_tx_ctrl.cons.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			.tx_prod_flags =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 				*(u8 *)&conn->local_tx_ctrl.prod_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			.tx_conn_state_flags =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 				*(u8 *)&conn->local_tx_ctrl.conn_state_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			.rx_prod_flags = *(u8 *)&conn->local_rx_ctrl.prod_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			.rx_conn_state_flags =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 				*(u8 *)&conn->local_rx_ctrl.conn_state_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			.tx_prep.wrap = conn->tx_curs_prep.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			.tx_prep.count = conn->tx_curs_prep.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			.tx_sent.wrap = conn->tx_curs_sent.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			.tx_sent.count = conn->tx_curs_sent.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			.tx_fin.wrap = conn->tx_curs_fin.wrap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			.tx_fin.count = conn->tx_curs_fin.count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		if (nla_put(skb, SMC_DIAG_CONNINFO, sizeof(cinfo), &cinfo) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (smc->conn.lgr && !smc->conn.lgr->is_smcd &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	    (req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	    !list_empty(&smc->conn.lgr->list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		struct smc_diag_lgrinfo linfo = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			.role = smc->conn.lgr->role,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			.lnk[0].ibport = smc->conn.lgr->lnk[0].ibport,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			.lnk[0].link_id = smc->conn.lgr->lnk[0].link_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		memcpy(linfo.lnk[0].ibname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		       smc->conn.lgr->lnk[0].smcibdev->ibdev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		       sizeof(smc->conn.lgr->lnk[0].smcibdev->ibdev->name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		smc_gid_be16_convert(linfo.lnk[0].gid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				     smc->conn.lgr->lnk[0].gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		smc_gid_be16_convert(linfo.lnk[0].peer_gid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 				     smc->conn.lgr->lnk[0].peer_gid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (smc->conn.lgr && smc->conn.lgr->is_smcd &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	    (req->diag_ext & (1 << (SMC_DIAG_DMBINFO - 1))) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	    !list_empty(&smc->conn.lgr->list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		struct smc_connection *conn = &smc->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		struct smcd_diag_dmbinfo dinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		memset(&dinfo, 0, sizeof(dinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		dinfo.linkid = *((u32 *)conn->lgr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		dinfo.peer_gid = conn->lgr->peer_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		dinfo.my_gid = conn->lgr->smcd->local_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		dinfo.token = conn->rmb_desc->token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		dinfo.peer_token = conn->peer_token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (nla_put(skb, SMC_DIAG_DMBINFO, sizeof(dinfo), &dinfo) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int smc_diag_dump_proto(struct proto *prot, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			       struct netlink_callback *cb, int p_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct smc_diag_dump_ctx *cb_ctx = smc_dump_context(cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	int snum = cb_ctx->pos[p_type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	struct nlattr *bc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	struct hlist_head *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	int rc = 0, num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	read_lock(&prot->h.smc_hash->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	head = &prot->h.smc_hash->ht;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (hlist_empty(head))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	sk_for_each(sk, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		if (!net_eq(sock_net(sk), net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		if (num < snum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		num++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	read_unlock(&prot->h.smc_hash->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	cb_ctx->pos[p_type] = num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static int smc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	rc = smc_diag_dump_proto(&smc_proto, skb, cb, SMCPROTO_SMC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		smc_diag_dump_proto(&smc_proto6, skb, cb, SMCPROTO_SMC6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int smc_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	    h->nlmsg_flags & NLM_F_DUMP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			struct netlink_dump_control c = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 				.dump = smc_diag_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 				.min_dump_alloc = SKB_WITH_OVERHEAD(32768),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			return netlink_dump_start(net->diag_nlsk, skb, h, &c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static const struct sock_diag_handler smc_diag_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	.family = AF_SMC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	.dump = smc_diag_handler_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static int __init smc_diag_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	return sock_diag_register(&smc_diag_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static void __exit smc_diag_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	sock_diag_unregister(&smc_diag_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) module_init(smc_diag_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) module_exit(smc_diag_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);