diff options
Diffstat (limited to 'net/smc/smc_core.c')
| -rw-r--r-- | net/smc/smc_core.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index af96f813c075..5bc8ebcd03f3 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -139,6 +139,7 @@ static int smcr_lgr_conn_assign_link(struct smc_connection *conn, bool first) } if (!conn->lnk) return SMC_CLC_DECL_NOACTLINK; + atomic_inc(&conn->lnk->conn_cnt); return 0; } @@ -180,6 +181,8 @@ static void __smc_lgr_unregister_conn(struct smc_connection *conn) struct smc_link_group *lgr = conn->lgr; rb_erase(&conn->alert_node, &lgr->conns_all); + if (conn->lnk) + atomic_dec(&conn->lnk->conn_cnt); lgr->conns_num--; conn->alert_token_local = 0; sock_put(&smc->sk); /* sock_hold in smc_lgr_register_conn() */ @@ -314,6 +317,7 @@ int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk, lnk->smcibdev = ini->ib_dev; lnk->ibport = ini->ib_port; lnk->path_mtu = ini->ib_dev->pattr[ini->ib_port - 1].active_mtu; + atomic_set(&lnk->conn_cnt, 0); smc_llc_link_set_uid(lnk); INIT_WORK(&lnk->link_down_wrk, smc_link_down_work); if (!ini->ib_dev->initialized) { @@ -526,6 +530,14 @@ static int smc_switch_cursor(struct smc_sock *smc, struct smc_cdc_tx_pend *pend, return rc; } +static void smc_switch_link_and_count(struct smc_connection *conn, + struct smc_link *to_lnk) +{ + atomic_dec(&conn->lnk->conn_cnt); + conn->lnk = to_lnk; + atomic_inc(&conn->lnk->conn_cnt); +} + struct smc_link *smc_switch_conns(struct smc_link_group *lgr, struct smc_link *from_lnk, bool is_dev_err) { @@ -574,7 +586,7 @@ again: smc->sk.sk_state == SMC_PEERABORTWAIT || smc->sk.sk_state == SMC_PROCESSABORT) { spin_lock_bh(&conn->send_lock); - conn->lnk = to_lnk; + smc_switch_link_and_count(conn, to_lnk); spin_unlock_bh(&conn->send_lock); continue; } @@ -588,7 +600,7 @@ again: } /* avoid race with smcr_tx_sndbuf_nonempty() */ spin_lock_bh(&conn->send_lock); - conn->lnk = to_lnk; + smc_switch_link_and_count(conn, to_lnk); rc = smc_switch_cursor(smc, pend, wr_buf); spin_unlock_bh(&conn->send_lock); sock_put(&smc->sk); |