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path: root/net/smc/af_smc.c
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Diffstat (limited to 'net/smc/af_smc.c')
-rw-r--r--net/smc/af_smc.c89
1 files changed, 71 insertions, 18 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 5eff7cccceff..efeaed384769 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -49,6 +49,7 @@
#include "smc_tx.h"
#include "smc_rx.h"
#include "smc_close.h"
+#include "smc_stats.h"
static DEFINE_MUTEX(smc_server_lgr_pending); /* serialize link group
* creation on server
@@ -508,9 +509,42 @@ static void smc_link_save_peer_info(struct smc_link *link,
link->peer_mtu = clc->r0.qp_mtu;
}
-static void smc_switch_to_fallback(struct smc_sock *smc)
+static void smc_stat_inc_fback_rsn_cnt(struct smc_sock *smc,
+ struct smc_stats_fback *fback_arr)
+{
+ int cnt;
+
+ for (cnt = 0; cnt < SMC_MAX_FBACK_RSN_CNT; cnt++) {
+ if (fback_arr[cnt].fback_code == smc->fallback_rsn) {
+ fback_arr[cnt].count++;
+ break;
+ }
+ if (!fback_arr[cnt].fback_code) {
+ fback_arr[cnt].fback_code = smc->fallback_rsn;
+ fback_arr[cnt].count++;
+ break;
+ }
+ }
+}
+
+static void smc_stat_fallback(struct smc_sock *smc)
+{
+ mutex_lock(&smc_stat_fback_rsn);
+ if (smc->listen_smc) {
+ smc_stat_inc_fback_rsn_cnt(smc, fback_rsn.srv);
+ fback_rsn.srv_fback_cnt++;
+ } else {
+ smc_stat_inc_fback_rsn_cnt(smc, fback_rsn.clnt);
+ fback_rsn.clnt_fback_cnt++;
+ }
+ mutex_unlock(&smc_stat_fback_rsn);
+}
+
+static void smc_switch_to_fallback(struct smc_sock *smc, int reason_code)
{
smc->use_fallback = true;
+ smc->fallback_rsn = reason_code;
+ smc_stat_fallback(smc);
if (smc->sk.sk_socket && smc->sk.sk_socket->file) {
smc->clcsock->file = smc->sk.sk_socket->file;
smc->clcsock->file->private_data = smc->clcsock;
@@ -522,8 +556,7 @@ static void smc_switch_to_fallback(struct smc_sock *smc)
/* fall back during connect */
static int smc_connect_fallback(struct smc_sock *smc, int reason_code)
{
- smc_switch_to_fallback(smc);
- smc->fallback_rsn = reason_code;
+ smc_switch_to_fallback(smc, reason_code);
smc_copy_sock_settings_to_clc(smc);
smc->connect_nonblock = 0;
if (smc->sk.sk_state == SMC_INIT)
@@ -538,6 +571,7 @@ static int smc_connect_decline_fallback(struct smc_sock *smc, int reason_code,
int rc;
if (reason_code < 0) { /* error, fallback is not possible */
+ this_cpu_inc(smc_stats->clnt_hshake_err_cnt);
if (smc->sk.sk_state == SMC_INIT)
sock_put(&smc->sk); /* passive closing */
return reason_code;
@@ -545,6 +579,7 @@ static int smc_connect_decline_fallback(struct smc_sock *smc, int reason_code,
if (reason_code != SMC_CLC_DECL_PEERDECL) {
rc = smc_clc_send_decline(smc, reason_code, version);
if (rc < 0) {
+ this_cpu_inc(smc_stats->clnt_hshake_err_cnt);
if (smc->sk.sk_state == SMC_INIT)
sock_put(&smc->sk); /* passive closing */
return rc;
@@ -992,6 +1027,7 @@ static int __smc_connect(struct smc_sock *smc)
if (rc)
goto vlan_cleanup;
+ SMC_STAT_CLNT_SUCC_INC(aclc);
smc_connect_ism_vlan_cleanup(smc, ini);
kfree(buf);
kfree(ini);
@@ -1308,6 +1344,7 @@ static void smc_listen_out_err(struct smc_sock *new_smc)
{
struct sock *newsmcsk = &new_smc->sk;
+ this_cpu_inc(smc_stats->srv_hshake_err_cnt);
if (newsmcsk->sk_state == SMC_INIT)
sock_put(&new_smc->sk); /* passive closing */
newsmcsk->sk_state = SMC_CLOSED;
@@ -1325,8 +1362,7 @@ static void smc_listen_decline(struct smc_sock *new_smc, int reason_code,
smc_listen_out_err(new_smc);
return;
}
- smc_switch_to_fallback(new_smc);
- new_smc->fallback_rsn = reason_code;
+ smc_switch_to_fallback(new_smc, reason_code);
if (reason_code && reason_code != SMC_CLC_DECL_PEERDECL) {
if (smc_clc_send_decline(new_smc, reason_code, version) < 0) {
smc_listen_out_err(new_smc);
@@ -1699,8 +1735,7 @@ static void smc_listen_work(struct work_struct *work)
/* check if peer is smc capable */
if (!tcp_sk(newclcsock->sk)->syn_smc) {
- smc_switch_to_fallback(new_smc);
- new_smc->fallback_rsn = SMC_CLC_DECL_PEERNOSMC;
+ smc_switch_to_fallback(new_smc, SMC_CLC_DECL_PEERNOSMC);
smc_listen_out_connected(new_smc);
return;
}
@@ -1778,6 +1813,7 @@ static void smc_listen_work(struct work_struct *work)
}
smc_conn_save_peer_info(new_smc, cclc);
smc_listen_out_connected(new_smc);
+ SMC_STAT_SERV_SUCC_INC(ini);
goto out_free;
out_unlock:
@@ -1984,18 +2020,19 @@ static int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
if (msg->msg_flags & MSG_FASTOPEN) {
if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) {
- smc_switch_to_fallback(smc);
- smc->fallback_rsn = SMC_CLC_DECL_OPTUNSUPP;
+ smc_switch_to_fallback(smc, SMC_CLC_DECL_OPTUNSUPP);
} else {
rc = -EINVAL;
goto out;
}
}
- if (smc->use_fallback)
+ if (smc->use_fallback) {
rc = smc->clcsock->ops->sendmsg(smc->clcsock, msg, len);
- else
+ } else {
rc = smc_tx_sendmsg(smc, msg, len);
+ SMC_STAT_TX_PAYLOAD(smc, len, rc);
+ }
out:
release_sock(sk);
return rc;
@@ -2030,6 +2067,7 @@ static int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
} else {
msg->msg_namelen = 0;
rc = smc_rx_recvmsg(smc, msg, NULL, len, flags);
+ SMC_STAT_RX_PAYLOAD(smc, rc, rc);
}
out:
@@ -2194,8 +2232,7 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
case TCP_FASTOPEN_NO_COOKIE:
/* option not supported by SMC */
if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) {
- smc_switch_to_fallback(smc);
- smc->fallback_rsn = SMC_CLC_DECL_OPTUNSUPP;
+ smc_switch_to_fallback(smc, SMC_CLC_DECL_OPTUNSUPP);
} else {
rc = -EINVAL;
}
@@ -2204,18 +2241,22 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
if (sk->sk_state != SMC_INIT &&
sk->sk_state != SMC_LISTEN &&
sk->sk_state != SMC_CLOSED) {
- if (val)
+ if (val) {
+ SMC_STAT_INC(!smc->conn.lnk, ndly_cnt);
mod_delayed_work(smc->conn.lgr->tx_wq,
&smc->conn.tx_work, 0);
+ }
}
break;
case TCP_CORK:
if (sk->sk_state != SMC_INIT &&
sk->sk_state != SMC_LISTEN &&
sk->sk_state != SMC_CLOSED) {
- if (!val)
+ if (!val) {
+ SMC_STAT_INC(!smc->conn.lnk, cork_cnt);
mod_delayed_work(smc->conn.lgr->tx_wq,
&smc->conn.tx_work, 0);
+ }
}
break;
case TCP_DEFER_ACCEPT:
@@ -2338,11 +2379,13 @@ static ssize_t smc_sendpage(struct socket *sock, struct page *page,
goto out;
}
release_sock(sk);
- if (smc->use_fallback)
+ if (smc->use_fallback) {
rc = kernel_sendpage(smc->clcsock, page, offset,
size, flags);
- else
+ } else {
+ SMC_STAT_INC(!smc->conn.lnk, sendpage_cnt);
rc = sock_no_sendpage(sock, page, offset, size, flags);
+ }
out:
return rc;
@@ -2391,6 +2434,7 @@ static ssize_t smc_splice_read(struct socket *sock, loff_t *ppos,
flags = MSG_DONTWAIT;
else
flags = 0;
+ SMC_STAT_INC(!smc->conn.lnk, splice_cnt);
rc = smc_rx_recvmsg(smc, NULL, pipe, len, flags);
}
out:
@@ -2514,10 +2558,16 @@ static int __init smc_init(void)
if (!smc_close_wq)
goto out_alloc_hs_wq;
+ rc = smc_stats_init();
+ if (rc) {
+ pr_err("%s: smc_stats_init fails with %d\n", __func__, rc);
+ goto out_alloc_wqs;
+ }
+
rc = smc_core_init();
if (rc) {
pr_err("%s: smc_core_init fails with %d\n", __func__, rc);
- goto out_alloc_wqs;
+ goto out_smc_stat;
}
rc = smc_llc_init();
@@ -2569,6 +2619,8 @@ out_proto:
proto_unregister(&smc_proto);
out_core:
smc_core_exit();
+out_smc_stat:
+ smc_stats_exit();
out_alloc_wqs:
destroy_workqueue(smc_close_wq);
out_alloc_hs_wq:
@@ -2591,6 +2643,7 @@ static void __exit smc_exit(void)
smc_ib_unregister_client();
destroy_workqueue(smc_close_wq);
destroy_workqueue(smc_hs_wq);
+ smc_stats_exit();
proto_unregister(&smc_proto6);
proto_unregister(&smc_proto);
smc_pnet_exit();
generated by cgit (git 2.34.1) at 2024-06-16 16:13:37 +0000