diff options
Diffstat (limited to 'net/smc/af_smc.c')
| -rw-r--r-- | net/smc/af_smc.c | 44 |
1 files changed, 28 insertions, 16 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index cf49ed05007b..48ea7669161f 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -42,8 +42,11 @@ #include "smc_rx.h" #include "smc_close.h" -static DEFINE_MUTEX(smc_create_lgr_pending); /* serialize link group - * creation +static DEFINE_MUTEX(smc_server_lgr_pending); /* serialize link group + * creation on server + */ +static DEFINE_MUTEX(smc_client_lgr_pending); /* serialize link group + * creation on client */ static void smc_tcp_listen_work(struct work_struct *); @@ -477,7 +480,12 @@ static int smc_connect_abort(struct smc_sock *smc, int reason_code, { if (local_contact == SMC_FIRST_CONTACT) smc_lgr_forget(smc->conn.lgr); - mutex_unlock(&smc_create_lgr_pending); + if (smc->conn.lgr->is_smcd) + /* there is only one lgr role for SMC-D; use server lock */ + mutex_unlock(&smc_server_lgr_pending); + else + mutex_unlock(&smc_client_lgr_pending); + smc_conn_free(&smc->conn); return reason_code; } @@ -562,7 +570,7 @@ static int smc_connect_rdma(struct smc_sock *smc, struct smc_link *link; int reason_code = 0; - mutex_lock(&smc_create_lgr_pending); + mutex_lock(&smc_client_lgr_pending); local_contact = smc_conn_create(smc, false, aclc->hdr.flag, ibdev, ibport, ntoh24(aclc->qpn), &aclc->lcl, NULL, 0); @@ -573,7 +581,8 @@ static int smc_connect_rdma(struct smc_sock *smc, reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */ else reason_code = SMC_CLC_DECL_INTERR; /* other error */ - return smc_connect_abort(smc, reason_code, 0); + mutex_unlock(&smc_client_lgr_pending); + return reason_code; } link = &smc->conn.lgr->lnk[SMC_SINGLE_LINK]; @@ -617,7 +626,7 @@ static int smc_connect_rdma(struct smc_sock *smc, return smc_connect_abort(smc, reason_code, local_contact); } - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_client_lgr_pending); smc_copy_sock_settings_to_clc(smc); if (smc->sk.sk_state == SMC_INIT) @@ -634,11 +643,14 @@ static int smc_connect_ism(struct smc_sock *smc, int local_contact = SMC_FIRST_CONTACT; int rc = 0; - mutex_lock(&smc_create_lgr_pending); + /* there is only one lgr role for SMC-D; use server lock */ + mutex_lock(&smc_server_lgr_pending); local_contact = smc_conn_create(smc, true, aclc->hdr.flag, NULL, 0, 0, NULL, ismdev, aclc->gid); - if (local_contact < 0) - return smc_connect_abort(smc, SMC_CLC_DECL_MEM, 0); + if (local_contact < 0) { + mutex_unlock(&smc_server_lgr_pending); + return SMC_CLC_DECL_MEM; + } /* Create send and receive buffers */ if (smc_buf_create(smc, true)) @@ -652,7 +664,7 @@ static int smc_connect_ism(struct smc_sock *smc, rc = smc_clc_send_confirm(smc); if (rc) return smc_connect_abort(smc, rc, local_contact); - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_server_lgr_pending); smc_copy_sock_settings_to_clc(smc); if (smc->sk.sk_state == SMC_INIT) @@ -1251,7 +1263,7 @@ static void smc_listen_work(struct work_struct *work) return; } - mutex_lock(&smc_create_lgr_pending); + mutex_lock(&smc_server_lgr_pending); smc_close_init(new_smc); smc_rx_init(new_smc); smc_tx_init(new_smc); @@ -1273,7 +1285,7 @@ static void smc_listen_work(struct work_struct *work) &local_contact) || smc_listen_rdma_reg(new_smc, local_contact))) { /* SMC not supported, decline */ - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_server_lgr_pending); smc_listen_decline(new_smc, SMC_CLC_DECL_MODEUNSUPP, local_contact); return; @@ -1282,21 +1294,21 @@ static void smc_listen_work(struct work_struct *work) /* send SMC Accept CLC message */ rc = smc_clc_send_accept(new_smc, local_contact); if (rc) { - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_server_lgr_pending); smc_listen_decline(new_smc, rc, local_contact); return; } /* SMC-D does not need this lock any more */ if (ism_supported) - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_server_lgr_pending); /* receive SMC Confirm CLC message */ reason_code = smc_clc_wait_msg(new_smc, &cclc, sizeof(cclc), SMC_CLC_CONFIRM, CLC_WAIT_TIME); if (reason_code) { if (!ism_supported) - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_server_lgr_pending); smc_listen_decline(new_smc, reason_code, local_contact); return; } @@ -1304,7 +1316,7 @@ static void smc_listen_work(struct work_struct *work) /* finish worker */ if (!ism_supported) { rc = smc_listen_rdma_finish(new_smc, &cclc, local_contact); - mutex_unlock(&smc_create_lgr_pending); + mutex_unlock(&smc_server_lgr_pending); if (rc) return; } |