Lines Matching full:smc
3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
19 #define KMSG_COMPONENT "smc"
34 #include <net/smc.h>
41 #include "smc.h"
86 sock_net(skb->sk)->smc.limit_smc_hs)) in smc_nl_dump_hs_limitation()
100 sock_net(skb->sk)->smc.limit_smc_hs = true; in smc_nl_enable_hs_limitation()
106 sock_net(skb->sk)->smc.limit_smc_hs = false; in smc_nl_disable_hs_limitation()
112 struct smc_sock *smc = smc_sk(sk); in smc_set_keepalive() local
114 smc->clcsock->sk->sk_prot->keepalive(smc->clcsock->sk, val); in smc_set_keepalive()
124 struct smc_sock *smc; in smc_tcp_syn_recv_sock() local
127 smc = smc_clcsock_user_data(sk); in smc_tcp_syn_recv_sock()
129 if (READ_ONCE(sk->sk_ack_backlog) + atomic_read(&smc->queued_smc_hs) > in smc_tcp_syn_recv_sock()
133 if (sk_acceptq_is_full(&smc->sk)) { in smc_tcp_syn_recv_sock()
139 child = smc->ori_af_ops->syn_recv_sock(sk, skb, req, dst, req_unhash, in smc_tcp_syn_recv_sock()
141 /* child must not inherit smc or its ops */ in smc_tcp_syn_recv_sock()
147 inet_csk(child)->icsk_af_ops = smc->ori_af_ops; in smc_tcp_syn_recv_sock()
159 const struct smc_sock *smc; in smc_hs_congested() local
161 smc = smc_clcsock_user_data(sk); in smc_hs_congested()
163 if (!smc) in smc_hs_congested()
213 struct smc_sock *smc = smc_sk(sk); in smc_release_cb() local
215 if (smc->conn.tx_in_release_sock) { in smc_release_cb()
216 smc_tx_pending(&smc->conn); in smc_release_cb()
217 smc->conn.tx_in_release_sock = false; in smc_release_cb()
222 .name = "SMC",
247 static void smc_fback_restore_callbacks(struct smc_sock *smc) in smc_fback_restore_callbacks() argument
249 struct sock *clcsk = smc->clcsock->sk; in smc_fback_restore_callbacks()
254 smc_clcsock_restore_cb(&clcsk->sk_state_change, &smc->clcsk_state_change); in smc_fback_restore_callbacks()
255 smc_clcsock_restore_cb(&clcsk->sk_data_ready, &smc->clcsk_data_ready); in smc_fback_restore_callbacks()
256 smc_clcsock_restore_cb(&clcsk->sk_write_space, &smc->clcsk_write_space); in smc_fback_restore_callbacks()
257 smc_clcsock_restore_cb(&clcsk->sk_error_report, &smc->clcsk_error_report); in smc_fback_restore_callbacks()
262 static void smc_restore_fallback_changes(struct smc_sock *smc) in smc_restore_fallback_changes() argument
264 if (smc->clcsock->file) { /* non-accepted sockets have no file yet */ in smc_restore_fallback_changes()
265 smc->clcsock->file->private_data = smc->sk.sk_socket; in smc_restore_fallback_changes()
266 smc->clcsock->file = NULL; in smc_restore_fallback_changes()
267 smc_fback_restore_callbacks(smc); in smc_restore_fallback_changes()
271 static int __smc_release(struct smc_sock *smc) in __smc_release() argument
273 struct sock *sk = &smc->sk; in __smc_release()
276 if (!smc->use_fallback) { in __smc_release()
277 rc = smc_close_active(smc); in __smc_release()
287 rc = kernel_sock_shutdown(smc->clcsock, in __smc_release()
293 smc_restore_fallback_changes(smc); in __smc_release()
299 if (smc->clcsock) { in __smc_release()
301 smc_clcsock_release(smc); in __smc_release()
304 if (!smc->use_fallback) in __smc_release()
305 smc_conn_free(&smc->conn); in __smc_release()
314 struct smc_sock *smc; in smc_release() local
321 smc = smc_sk(sk); in smc_release()
326 if (smc->connect_nonblock && old_state == SMC_INIT) in smc_release()
327 tcp_abort(smc->clcsock->sk, ECONNABORTED); in smc_release()
329 if (cancel_work_sync(&smc->connect_work)) in smc_release()
330 sock_put(&smc->sk); /* sock_hold in smc_connect for passive closing */ in smc_release()
341 !smc->use_fallback) in smc_release()
342 smc_close_active_abort(smc); in smc_release()
344 rc = __smc_release(smc); in smc_release()
367 struct smc_sock *smc = smc_sk(sk); in smc_sk_init() local
372 WRITE_ONCE(sk->sk_sndbuf, 2 * READ_ONCE(net->smc.sysctl_wmem)); in smc_sk_init()
373 WRITE_ONCE(sk->sk_rcvbuf, 2 * READ_ONCE(net->smc.sysctl_rmem)); in smc_sk_init()
374 INIT_WORK(&smc->tcp_listen_work, smc_tcp_listen_work); in smc_sk_init()
375 INIT_WORK(&smc->connect_work, smc_connect_work); in smc_sk_init()
376 INIT_DELAYED_WORK(&smc->conn.tx_work, smc_tx_work); in smc_sk_init()
377 INIT_LIST_HEAD(&smc->accept_q); in smc_sk_init()
378 spin_lock_init(&smc->accept_q_lock); in smc_sk_init()
379 spin_lock_init(&smc->conn.send_lock); in smc_sk_init()
381 mutex_init(&smc->clcsock_release_lock); in smc_sk_init()
382 smc_init_saved_callbacks(smc); in smc_sk_init()
383 smc->limit_smc_hs = net->smc.limit_smc_hs; in smc_sk_init()
384 smc->use_fallback = false; /* assume rdma capability first */ in smc_sk_init()
385 smc->fallback_rsn = 0; in smc_sk_init()
386 smc_close_init(smc); in smc_sk_init()
411 struct smc_sock *smc; in smc_bind() local
414 smc = smc_sk(sk); in smc_bind()
435 if (sk->sk_state != SMC_INIT || smc->connect_nonblock) in smc_bind()
438 smc->clcsock->sk->sk_reuse = sk->sk_reuse; in smc_bind()
439 smc->clcsock->sk->sk_reuseport = sk->sk_reuseport; in smc_bind()
440 rc = kernel_bind(smc->clcsock, uaddr, addr_len); in smc_bind()
448 /* copy only relevant settings and flags of SOL_SOCKET level from smc to
449 * clc socket (since smc is not called for these options from net/core)
468 /* if set, use value set by setsockopt() - else use IPv4 or SMC sysctl value */
498 static void smc_copy_sock_settings_to_clc(struct smc_sock *smc) in smc_copy_sock_settings_to_clc() argument
500 smc_copy_sock_settings(smc->clcsock->sk, &smc->sk, SK_FLAGS_SMC_TO_CLC); in smc_copy_sock_settings_to_clc()
507 /* copy only settings and flags relevant for smc from clc to smc socket */
508 static void smc_copy_sock_settings_to_smc(struct smc_sock *smc) in smc_copy_sock_settings_to_smc() argument
510 smc_copy_sock_settings(&smc->sk, smc->clcsock->sk, SK_FLAGS_CLC_TO_SMC); in smc_copy_sock_settings_to_smc()
586 static int smcr_clnt_conf_first_link(struct smc_sock *smc) in smcr_clnt_conf_first_link() argument
588 struct smc_link *link = smc->conn.lnk; in smcr_clnt_conf_first_link()
602 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_clnt_conf_first_link()
619 if (smc->conn.sndbuf_desc->is_vm) { in smcr_clnt_conf_first_link()
620 if (smcr_link_reg_buf(link, smc->conn.sndbuf_desc)) in smcr_clnt_conf_first_link()
625 if (smcr_link_reg_buf(link, smc->conn.rmb_desc)) in smcr_clnt_conf_first_link()
629 smc->conn.rmb_desc->is_conf_rkey = true; in smcr_clnt_conf_first_link()
646 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_clnt_conf_first_link()
668 static void smc_conn_save_peer_info_fce(struct smc_sock *smc, in smc_conn_save_peer_info_fce() argument
678 if (smc->conn.lgr->is_smcd) { in smc_conn_save_peer_info_fce()
679 memcpy(smc->conn.lgr->negotiated_eid, clc->d1.eid, in smc_conn_save_peer_info_fce()
683 memcpy(smc->conn.lgr->negotiated_eid, clc->r1.eid, in smc_conn_save_peer_info_fce()
688 smc->conn.lgr->peer_os = fce->os_type; in smc_conn_save_peer_info_fce()
689 smc->conn.lgr->peer_smc_release = fce->release; in smc_conn_save_peer_info_fce()
691 memcpy(smc->conn.lgr->peer_hostname, fce->hostname, in smc_conn_save_peer_info_fce()
695 static void smcr_conn_save_peer_info(struct smc_sock *smc, in smcr_conn_save_peer_info() argument
700 smc->conn.peer_rmbe_idx = clc->r0.rmbe_idx; in smcr_conn_save_peer_info()
701 smc->conn.local_tx_ctrl.token = ntohl(clc->r0.rmbe_alert_token); in smcr_conn_save_peer_info()
702 smc->conn.peer_rmbe_size = bufsize; in smcr_conn_save_peer_info()
703 atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size); in smcr_conn_save_peer_info()
704 smc->conn.tx_off = bufsize * (smc->conn.peer_rmbe_idx - 1); in smcr_conn_save_peer_info()
707 static void smcd_conn_save_peer_info(struct smc_sock *smc, in smcd_conn_save_peer_info() argument
712 smc->conn.peer_rmbe_idx = clc->d0.dmbe_idx; in smcd_conn_save_peer_info()
713 smc->conn.peer_token = ntohll(clc->d0.token); in smcd_conn_save_peer_info()
715 smc->conn.peer_rmbe_size = bufsize - sizeof(struct smcd_cdc_msg); in smcd_conn_save_peer_info()
716 atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size); in smcd_conn_save_peer_info()
717 smc->conn.tx_off = bufsize * smc->conn.peer_rmbe_idx; in smcd_conn_save_peer_info()
720 static void smc_conn_save_peer_info(struct smc_sock *smc, in smc_conn_save_peer_info() argument
723 if (smc->conn.lgr->is_smcd) in smc_conn_save_peer_info()
724 smcd_conn_save_peer_info(smc, clc); in smc_conn_save_peer_info()
726 smcr_conn_save_peer_info(smc, clc); in smc_conn_save_peer_info()
727 smc_conn_save_peer_info_fce(smc, clc); in smc_conn_save_peer_info()
741 static void smc_stat_inc_fback_rsn_cnt(struct smc_sock *smc, in smc_stat_inc_fback_rsn_cnt() argument
747 if (fback_arr[cnt].fback_code == smc->fallback_rsn) { in smc_stat_inc_fback_rsn_cnt()
752 fback_arr[cnt].fback_code = smc->fallback_rsn; in smc_stat_inc_fback_rsn_cnt()
759 static void smc_stat_fallback(struct smc_sock *smc) in smc_stat_fallback() argument
761 struct net *net = sock_net(&smc->sk); in smc_stat_fallback()
763 mutex_lock(&net->smc.mutex_fback_rsn); in smc_stat_fallback()
764 if (smc->listen_smc) { in smc_stat_fallback()
765 smc_stat_inc_fback_rsn_cnt(smc, net->smc.fback_rsn->srv); in smc_stat_fallback()
766 net->smc.fback_rsn->srv_fback_cnt++; in smc_stat_fallback()
768 smc_stat_inc_fback_rsn_cnt(smc, net->smc.fback_rsn->clnt); in smc_stat_fallback()
769 net->smc.fback_rsn->clnt_fback_cnt++; in smc_stat_fallback()
771 mutex_unlock(&net->smc.mutex_fback_rsn); in smc_stat_fallback()
775 static void smc_fback_wakeup_waitqueue(struct smc_sock *smc, void *key) in smc_fback_wakeup_waitqueue() argument
780 wq = rcu_dereference(smc->sk.sk_wq); in smc_fback_wakeup_waitqueue()
784 /* wake up smc sk->sk_wq */ in smc_fback_wakeup_waitqueue()
810 static void smc_fback_forward_wakeup(struct smc_sock *smc, struct sock *clcsk, in smc_fback_forward_wakeup() argument
827 smc_fback_wakeup_waitqueue(smc, mark.key); in smc_fback_forward_wakeup()
834 struct smc_sock *smc; in smc_fback_state_change() local
837 smc = smc_clcsock_user_data(clcsk); in smc_fback_state_change()
838 if (smc) in smc_fback_state_change()
839 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_state_change()
840 smc->clcsk_state_change); in smc_fback_state_change()
846 struct smc_sock *smc; in smc_fback_data_ready() local
849 smc = smc_clcsock_user_data(clcsk); in smc_fback_data_ready()
850 if (smc) in smc_fback_data_ready()
851 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_data_ready()
852 smc->clcsk_data_ready); in smc_fback_data_ready()
858 struct smc_sock *smc; in smc_fback_write_space() local
861 smc = smc_clcsock_user_data(clcsk); in smc_fback_write_space()
862 if (smc) in smc_fback_write_space()
863 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_write_space()
864 smc->clcsk_write_space); in smc_fback_write_space()
870 struct smc_sock *smc; in smc_fback_error_report() local
873 smc = smc_clcsock_user_data(clcsk); in smc_fback_error_report()
874 if (smc) in smc_fback_error_report()
875 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_error_report()
876 smc->clcsk_error_report); in smc_fback_error_report()
880 static void smc_fback_replace_callbacks(struct smc_sock *smc) in smc_fback_replace_callbacks() argument
882 struct sock *clcsk = smc->clcsock->sk; in smc_fback_replace_callbacks()
885 clcsk->sk_user_data = (void *)((uintptr_t)smc | SK_USER_DATA_NOCOPY); in smc_fback_replace_callbacks()
888 &smc->clcsk_state_change); in smc_fback_replace_callbacks()
890 &smc->clcsk_data_ready); in smc_fback_replace_callbacks()
892 &smc->clcsk_write_space); in smc_fback_replace_callbacks()
894 &smc->clcsk_error_report); in smc_fback_replace_callbacks()
899 static int smc_switch_to_fallback(struct smc_sock *smc, int reason_code) in smc_switch_to_fallback() argument
903 mutex_lock(&smc->clcsock_release_lock); in smc_switch_to_fallback()
904 if (!smc->clcsock) { in smc_switch_to_fallback()
909 smc->use_fallback = true; in smc_switch_to_fallback()
910 smc->fallback_rsn = reason_code; in smc_switch_to_fallback()
911 smc_stat_fallback(smc); in smc_switch_to_fallback()
912 trace_smc_switch_to_fallback(smc, reason_code); in smc_switch_to_fallback()
913 if (smc->sk.sk_socket && smc->sk.sk_socket->file) { in smc_switch_to_fallback()
914 smc->clcsock->file = smc->sk.sk_socket->file; in smc_switch_to_fallback()
915 smc->clcsock->file->private_data = smc->clcsock; in smc_switch_to_fallback()
916 smc->clcsock->wq.fasync_list = in smc_switch_to_fallback()
917 smc->sk.sk_socket->wq.fasync_list; in smc_switch_to_fallback()
920 * in smc sk->sk_wq and they should be woken up in smc_switch_to_fallback()
923 smc_fback_replace_callbacks(smc); in smc_switch_to_fallback()
926 mutex_unlock(&smc->clcsock_release_lock); in smc_switch_to_fallback()
931 static int smc_connect_fallback(struct smc_sock *smc, int reason_code) in smc_connect_fallback() argument
933 struct net *net = sock_net(&smc->sk); in smc_connect_fallback()
936 rc = smc_switch_to_fallback(smc, reason_code); in smc_connect_fallback()
938 this_cpu_inc(net->smc.smc_stats->clnt_hshake_err_cnt); in smc_connect_fallback()
939 if (smc->sk.sk_state == SMC_INIT) in smc_connect_fallback()
940 sock_put(&smc->sk); /* passive closing */ in smc_connect_fallback()
943 smc_copy_sock_settings_to_clc(smc); in smc_connect_fallback()
944 smc->connect_nonblock = 0; in smc_connect_fallback()
945 if (smc->sk.sk_state == SMC_INIT) in smc_connect_fallback()
946 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_fallback()
951 static int smc_connect_decline_fallback(struct smc_sock *smc, int reason_code, in smc_connect_decline_fallback() argument
954 struct net *net = sock_net(&smc->sk); in smc_connect_decline_fallback()
958 this_cpu_inc(net->smc.smc_stats->clnt_hshake_err_cnt); in smc_connect_decline_fallback()
959 if (smc->sk.sk_state == SMC_INIT) in smc_connect_decline_fallback()
960 sock_put(&smc->sk); /* passive closing */ in smc_connect_decline_fallback()
964 rc = smc_clc_send_decline(smc, reason_code, version); in smc_connect_decline_fallback()
966 this_cpu_inc(net->smc.smc_stats->clnt_hshake_err_cnt); in smc_connect_decline_fallback()
967 if (smc->sk.sk_state == SMC_INIT) in smc_connect_decline_fallback()
968 sock_put(&smc->sk); /* passive closing */ in smc_connect_decline_fallback()
972 return smc_connect_fallback(smc, reason_code); in smc_connect_decline_fallback()
975 static void smc_conn_abort(struct smc_sock *smc, int local_first) in smc_conn_abort() argument
977 struct smc_connection *conn = &smc->conn; in smc_conn_abort()
991 static int smc_find_rdma_device(struct smc_sock *smc, struct smc_init_info *ini) in smc_find_rdma_device() argument
997 smc_pnet_find_roce_resource(smc->clcsock->sk, ini); in smc_find_rdma_device()
1007 static int smc_find_ism_device(struct smc_sock *smc, struct smc_init_info *ini) in smc_find_ism_device() argument
1010 smc_pnet_find_ism_resource(smc->clcsock->sk, ini); in smc_find_ism_device()
1033 static int smc_find_ism_v2_device_clnt(struct smc_sock *smc, in smc_find_ism_v2_device_clnt() argument
1053 smc_pnet_is_ndev_pnetid(sock_net(&smc->sk), smcd->pnetid)) { in smc_find_ism_v2_device_clnt()
1056 * Proposal SMC-Dv2 extension, but a virtual in smc_find_ism_v2_device_clnt()
1080 static int smc_connect_ism_vlan_setup(struct smc_sock *smc, in smc_connect_ism_vlan_setup() argument
1088 static int smc_find_proposal_devices(struct smc_sock *smc, in smc_find_proposal_devices() argument
1095 smc_find_ism_device(smc, ini) || in smc_find_proposal_devices()
1096 smc_connect_ism_vlan_setup(smc, ini)) in smc_find_proposal_devices()
1102 smc_find_rdma_device(smc, ini)) in smc_find_proposal_devices()
1112 smc_find_ism_v2_device_clnt(smc, ini)) in smc_find_proposal_devices()
1117 ini->smcrv2.saddr = smc->clcsock->sk->sk_rcv_saddr; in smc_find_proposal_devices()
1119 smc->clcsock->sk->sk_family != AF_INET || in smc_find_proposal_devices()
1121 smc_find_rdma_device(smc, ini)) in smc_find_proposal_devices()
1138 static int smc_connect_ism_vlan_cleanup(struct smc_sock *smc, in smc_connect_ism_vlan_cleanup() argument
1154 static int smc_connect_clc(struct smc_sock *smc, in smc_connect_clc() argument
1161 rc = smc_clc_send_proposal(smc, ini); in smc_connect_clc()
1164 /* receive SMC Accept CLC message */ in smc_connect_clc()
1165 return smc_clc_wait_msg(smc, aclc, SMC_CLC_MAX_ACCEPT_LEN, in smc_connect_clc()
1197 static int smc_connect_rdma_v2_prepare(struct smc_sock *smc, in smc_connect_rdma_v2_prepare() argument
1203 struct net *net = sock_net(&smc->sk); in smc_connect_rdma_v2_prepare()
1213 if (smc_ib_find_route(net, smc->clcsock->sk->sk_rcv_saddr, in smc_connect_rdma_v2_prepare()
1233 static int smc_connect_rdma(struct smc_sock *smc, in smc_connect_rdma() argument
1250 reason_code = smc_connect_rdma_v2_prepare(smc, aclc, ini); in smc_connect_rdma()
1255 reason_code = smc_conn_create(smc, ini); in smc_connect_rdma()
1261 smc_conn_save_peer_info(smc, aclc); in smc_connect_rdma()
1264 link = smc->conn.lnk; in smc_connect_rdma()
1269 struct smc_link *l = &smc->conn.lgr->lnk[i]; in smc_connect_rdma()
1285 smc_switch_link_and_count(&smc->conn, link); in smc_connect_rdma()
1289 if (smc_buf_create(smc, false)) { in smc_connect_rdma()
1297 if (smc_rmb_rtoken_handling(&smc->conn, link, aclc)) { in smc_connect_rdma()
1302 smc_rx_init(smc); in smc_connect_rdma()
1311 if (smc->conn.sndbuf_desc->is_vm) { in smc_connect_rdma()
1312 if (smcr_lgr_reg_sndbufs(link, smc->conn.sndbuf_desc)) { in smc_connect_rdma()
1317 if (smcr_lgr_reg_rmbs(link, smc->conn.rmb_desc)) { in smc_connect_rdma()
1330 reason_code = smc_clc_send_confirm(smc, ini->first_contact_local, in smc_connect_rdma()
1335 smc_tx_init(smc); in smc_connect_rdma()
1340 reason_code = smcr_clnt_conf_first_link(smc); in smc_connect_rdma()
1347 smc_copy_sock_settings_to_clc(smc); in smc_connect_rdma()
1348 smc->connect_nonblock = 0; in smc_connect_rdma()
1349 if (smc->sk.sk_state == SMC_INIT) in smc_connect_rdma()
1350 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_rdma()
1354 smc_conn_abort(smc, ini->first_contact_local); in smc_connect_rdma()
1356 smc->connect_nonblock = 0; in smc_connect_rdma()
1381 static int smc_connect_ism(struct smc_sock *smc, in smc_connect_ism() argument
1413 /* there is only one lgr role for SMC-D; use server lock */ in smc_connect_ism()
1415 rc = smc_conn_create(smc, ini); in smc_connect_ism()
1422 rc = smc_buf_create(smc, true); in smc_connect_ism()
1428 smc_conn_save_peer_info(smc, aclc); in smc_connect_ism()
1430 if (smc_ism_support_dmb_nocopy(smc->conn.lgr->smcd)) { in smc_connect_ism()
1431 rc = smcd_buf_attach(smc); in smc_connect_ism()
1437 smc_rx_init(smc); in smc_connect_ism()
1438 smc_tx_init(smc); in smc_connect_ism()
1443 rc = smc_clc_send_confirm(smc, ini->first_contact_local, in smc_connect_ism()
1449 smc_copy_sock_settings_to_clc(smc); in smc_connect_ism()
1450 smc->connect_nonblock = 0; in smc_connect_ism()
1451 if (smc->sk.sk_state == SMC_INIT) in smc_connect_ism()
1452 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_ism()
1456 smc_conn_abort(smc, ini->first_contact_local); in smc_connect_ism()
1458 smc->connect_nonblock = 0; in smc_connect_ism()
1489 static int __smc_connect(struct smc_sock *smc) in __smc_connect() argument
1497 if (smc->use_fallback) in __smc_connect()
1498 return smc_connect_fallback(smc, smc->fallback_rsn); in __smc_connect()
1500 /* if peer has not signalled SMC-capability, fall back */ in __smc_connect()
1501 if (!tcp_sk(smc->clcsock->sk)->syn_smc) in __smc_connect()
1502 return smc_connect_fallback(smc, SMC_CLC_DECL_PEERNOSMC); in __smc_connect()
1504 /* IPSec connections opt out of SMC optimizations */ in __smc_connect()
1505 if (using_ipsec(smc)) in __smc_connect()
1506 return smc_connect_decline_fallback(smc, SMC_CLC_DECL_IPSEC, in __smc_connect()
1511 return smc_connect_decline_fallback(smc, SMC_CLC_DECL_MEM, in __smc_connect()
1520 if (smc_vlan_by_tcpsk(smc->clcsock, ini)) { in __smc_connect()
1530 rc = smc_find_proposal_devices(smc, ini); in __smc_connect()
1542 rc = smc_connect_clc(smc, aclc, ini); in __smc_connect()
1547 smc->sk.sk_err = ETIMEDOUT; in __smc_connect()
1552 /* check if smc modes and versions of CLC proposal and accept match */ in __smc_connect()
1561 rc = smc_connect_rdma(smc, aclc, ini); in __smc_connect()
1564 rc = smc_connect_ism(smc, aclc, ini); in __smc_connect()
1569 SMC_STAT_CLNT_SUCC_INC(sock_net(smc->clcsock->sk), aclc); in __smc_connect()
1570 smc_connect_ism_vlan_cleanup(smc, ini); in __smc_connect()
1576 smc_connect_ism_vlan_cleanup(smc, ini); in __smc_connect()
1580 return smc_connect_decline_fallback(smc, rc, version); in __smc_connect()
1585 struct smc_sock *smc = container_of(work, struct smc_sock, in smc_connect_work() local
1587 long timeo = smc->sk.sk_sndtimeo; in smc_connect_work()
1592 lock_sock(smc->clcsock->sk); in smc_connect_work()
1593 if (smc->clcsock->sk->sk_err) { in smc_connect_work()
1594 smc->sk.sk_err = smc->clcsock->sk->sk_err; in smc_connect_work()
1595 } else if ((1 << smc->clcsock->sk->sk_state) & in smc_connect_work()
1597 rc = sk_stream_wait_connect(smc->clcsock->sk, &timeo); in smc_connect_work()
1599 ((1 << smc->clcsock->sk->sk_state) & in smc_connect_work()
1603 release_sock(smc->clcsock->sk); in smc_connect_work()
1604 lock_sock(&smc->sk); in smc_connect_work()
1605 if (rc != 0 || smc->sk.sk_err) { in smc_connect_work()
1606 smc->sk.sk_state = SMC_CLOSED; in smc_connect_work()
1608 smc->sk.sk_err = EPIPE; in smc_connect_work()
1610 smc->sk.sk_err = ECONNREFUSED; in smc_connect_work()
1612 smc->sk.sk_err = -sock_intr_errno(timeo); in smc_connect_work()
1613 sock_put(&smc->sk); /* passive closing */ in smc_connect_work()
1617 rc = __smc_connect(smc); in smc_connect_work()
1619 smc->sk.sk_err = -rc; in smc_connect_work()
1622 if (!sock_flag(&smc->sk, SOCK_DEAD)) { in smc_connect_work()
1623 if (smc->sk.sk_err) { in smc_connect_work()
1624 smc->sk.sk_state_change(&smc->sk); in smc_connect_work()
1626 smc->clcsock->sk->sk_write_space(smc->clcsock->sk); in smc_connect_work()
1627 smc->sk.sk_write_space(&smc->sk); in smc_connect_work()
1630 release_sock(&smc->sk); in smc_connect_work()
1637 struct smc_sock *smc; in smc_connect() local
1640 smc = smc_sk(sk); in smc_connect()
1642 /* separate smc parameter checking to be safe */ in smc_connect()
1679 smc_copy_sock_settings_to_clc(smc); in smc_connect()
1680 tcp_sk(smc->clcsock->sk)->syn_smc = 1; in smc_connect()
1681 if (smc->connect_nonblock) { in smc_connect()
1685 rc = kernel_connect(smc->clcsock, addr, alen, flags); in smc_connect()
1689 if (smc->use_fallback) { in smc_connect()
1693 sock_hold(&smc->sk); /* sock put in passive closing */ in smc_connect()
1695 if (queue_work(smc_hs_wq, &smc->connect_work)) in smc_connect()
1696 smc->connect_nonblock = 1; in smc_connect()
1700 rc = __smc_connect(smc); in smc_connect()
1750 /* new clcsock has inherited the smc listen-specific sk_data_ready in smc_clcsock_accept()
1836 struct smc_sock *smc = smc_sk(sk); in smc_close_non_accepted() local
1843 __smc_release(smc); in smc_close_non_accepted()
1849 static int smcr_serv_conf_first_link(struct smc_sock *smc) in smcr_serv_conf_first_link() argument
1851 struct smc_link *link = smc->conn.lnk; in smcr_serv_conf_first_link()
1856 if (smc->conn.sndbuf_desc->is_vm) { in smcr_serv_conf_first_link()
1857 if (smcr_link_reg_buf(link, smc->conn.sndbuf_desc)) in smcr_serv_conf_first_link()
1862 if (smcr_link_reg_buf(link, smc->conn.rmb_desc)) in smcr_serv_conf_first_link()
1876 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_serv_conf_first_link()
1887 smc->conn.rmb_desc->is_conf_rkey = true; in smcr_serv_conf_first_link()
1941 this_cpu_inc(net->smc.smc_stats->srv_hshake_err_cnt); in smc_listen_out_err()
2070 /* listen worker: initialize connection and buffers for SMC-D */
2448 /* check if peer is smc capable */ in smc_listen_work()
2459 * wait for and receive SMC Proposal CLC message in smc_listen_work()
2475 /* IPSec connections opt out of SMC optimizations */ in smc_listen_work()
2505 /* send SMC Accept CLC message */ in smc_listen_work()
2512 /* SMC-D does not need this lock any more */ in smc_listen_work()
2516 /* receive SMC Confirm CLC message */ in smc_listen_work()
2534 /* fce smc release version is needed in smc_listen_rdma_finish, in smc_listen_work()
2626 struct smc_sock *smc; in smc_listen() local
2629 smc = smc_sk(sk); in smc_listen()
2634 smc->connect_nonblock || sock->state != SS_UNCONNECTED) in smc_listen()
2643 * them to the clc socket -- copy smc socket options to clc socket in smc_listen()
2645 smc_copy_sock_settings_to_clc(smc); in smc_listen()
2646 if (!smc->use_fallback) in smc_listen()
2647 tcp_sk(smc->clcsock->sk)->syn_smc = 1; in smc_listen()
2650 * smc-specific sk_data_ready function in smc_listen()
2652 write_lock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2653 smc->clcsock->sk->sk_user_data = in smc_listen()
2654 (void *)((uintptr_t)smc | SK_USER_DATA_NOCOPY); in smc_listen()
2655 smc_clcsock_replace_cb(&smc->clcsock->sk->sk_data_ready, in smc_listen()
2656 smc_clcsock_data_ready, &smc->clcsk_data_ready); in smc_listen()
2657 write_unlock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2660 smc->ori_af_ops = inet_csk(smc->clcsock->sk)->icsk_af_ops; in smc_listen()
2662 smc->af_ops = *smc->ori_af_ops; in smc_listen()
2663 smc->af_ops.syn_recv_sock = smc_tcp_syn_recv_sock; in smc_listen()
2665 inet_csk(smc->clcsock->sk)->icsk_af_ops = &smc->af_ops; in smc_listen()
2667 if (smc->limit_smc_hs) in smc_listen()
2668 tcp_sk(smc->clcsock->sk)->smc_hs_congested = smc_hs_congested; in smc_listen()
2670 rc = kernel_listen(smc->clcsock, backlog); in smc_listen()
2672 write_lock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2673 smc_clcsock_restore_cb(&smc->clcsock->sk->sk_data_ready, in smc_listen()
2674 &smc->clcsk_data_ready); in smc_listen()
2675 smc->clcsock->sk->sk_user_data = NULL; in smc_listen()
2676 write_unlock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2761 struct smc_sock *smc; in smc_getname() local
2767 smc = smc_sk(sock->sk); in smc_getname()
2769 return smc->clcsock->ops->getname(smc->clcsock, addr, peer); in smc_getname()
2775 struct smc_sock *smc; in smc_sendmsg() local
2778 smc = smc_sk(sk); in smc_sendmsg()
2781 /* SMC does not support connect with fastopen */ in smc_sendmsg()
2784 if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) { in smc_sendmsg()
2785 rc = smc_switch_to_fallback(smc, SMC_CLC_DECL_OPTUNSUPP); in smc_sendmsg()
2799 if (smc->use_fallback) { in smc_sendmsg()
2800 rc = smc->clcsock->ops->sendmsg(smc->clcsock, msg, len); in smc_sendmsg()
2802 rc = smc_tx_sendmsg(smc, msg, len); in smc_sendmsg()
2803 SMC_STAT_TX_PAYLOAD(smc, len, rc); in smc_sendmsg()
2814 struct smc_sock *smc; in smc_recvmsg() local
2817 smc = smc_sk(sk); in smc_recvmsg()
2834 if (smc->use_fallback) { in smc_recvmsg()
2835 rc = smc->clcsock->ops->recvmsg(smc->clcsock, msg, len, flags); in smc_recvmsg()
2838 rc = smc_rx_recvmsg(smc, msg, NULL, len, flags); in smc_recvmsg()
2839 SMC_STAT_RX_PAYLOAD(smc, rc, rc); in smc_recvmsg()
2864 struct smc_sock *smc; in smc_poll() local
2870 smc = smc_sk(sock->sk); in smc_poll()
2871 if (smc->use_fallback) { in smc_poll()
2873 mask = smc->clcsock->ops->poll(file, smc->clcsock, wait); in smc_poll()
2874 sk->sk_err = smc->clcsock->sk->sk_err; in smc_poll()
2886 } else if (smc->use_fallback) { /* as result of connect_work()*/ in smc_poll()
2887 mask |= smc->clcsock->ops->poll(file, smc->clcsock, in smc_poll()
2889 sk->sk_err = smc->clcsock->sk->sk_err; in smc_poll()
2892 atomic_read(&smc->conn.sndbuf_space)) || in smc_poll()
2902 if (atomic_read(&smc->conn.sndbuf_space)) in smc_poll()
2906 if (atomic_read(&smc->conn.bytes_to_rcv)) in smc_poll()
2912 if (smc->conn.urg_state == SMC_URG_VALID) in smc_poll()
2924 struct smc_sock *smc; in smc_shutdown() local
2929 smc = smc_sk(sk); in smc_shutdown()
2955 if (smc->use_fallback) { in smc_shutdown()
2956 rc = kernel_sock_shutdown(smc->clcsock, how); in smc_shutdown()
2957 sk->sk_shutdown = smc->clcsock->sk->sk_shutdown; in smc_shutdown()
2968 rc = smc_close_active(smc); in smc_shutdown()
2974 rc = smc_close_shutdown_write(smc); in smc_shutdown()
2981 if (do_shutdown && smc->clcsock) in smc_shutdown()
2982 rc1 = kernel_sock_shutdown(smc->clcsock, how); in smc_shutdown()
2998 struct smc_sock *smc; in __smc_getsockopt() local
3001 smc = smc_sk(sock->sk); in __smc_getsockopt()
3013 val = smc->limit_smc_hs; in __smc_getsockopt()
3031 struct smc_sock *smc; in __smc_setsockopt() local
3034 smc = smc_sk(sk); in __smc_setsockopt()
3048 smc->limit_smc_hs = !!val; in __smc_setsockopt()
3064 struct smc_sock *smc; in smc_setsockopt() local
3072 smc = smc_sk(sk); in smc_setsockopt()
3077 mutex_lock(&smc->clcsock_release_lock); in smc_setsockopt()
3078 if (!smc->clcsock) { in smc_setsockopt()
3079 mutex_unlock(&smc->clcsock_release_lock); in smc_setsockopt()
3082 if (unlikely(!smc->clcsock->ops->setsockopt)) in smc_setsockopt()
3085 rc = smc->clcsock->ops->setsockopt(smc->clcsock, level, optname, in smc_setsockopt()
3087 if (smc->clcsock->sk->sk_err) { in smc_setsockopt()
3088 sk->sk_err = smc->clcsock->sk->sk_err; in smc_setsockopt()
3091 mutex_unlock(&smc->clcsock_release_lock); in smc_setsockopt()
3099 if (rc || smc->use_fallback) in smc_setsockopt()
3106 /* option not supported by SMC */ in smc_setsockopt()
3107 if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) { in smc_setsockopt()
3108 rc = smc_switch_to_fallback(smc, SMC_CLC_DECL_OPTUNSUPP); in smc_setsockopt()
3118 SMC_STAT_INC(smc, ndly_cnt); in smc_setsockopt()
3119 smc_tx_pending(&smc->conn); in smc_setsockopt()
3120 cancel_delayed_work(&smc->conn.tx_work); in smc_setsockopt()
3129 SMC_STAT_INC(smc, cork_cnt); in smc_setsockopt()
3130 smc_tx_pending(&smc->conn); in smc_setsockopt()
3131 cancel_delayed_work(&smc->conn.tx_work); in smc_setsockopt()
3136 smc->sockopt_defer_accept = val; in smc_setsockopt()
3150 struct smc_sock *smc; in smc_getsockopt() local
3156 smc = smc_sk(sock->sk); in smc_getsockopt()
3157 mutex_lock(&smc->clcsock_release_lock); in smc_getsockopt()
3158 if (!smc->clcsock) { in smc_getsockopt()
3159 mutex_unlock(&smc->clcsock_release_lock); in smc_getsockopt()
3163 if (unlikely(!smc->clcsock->ops->getsockopt)) { in smc_getsockopt()
3164 mutex_unlock(&smc->clcsock_release_lock); in smc_getsockopt()
3167 rc = smc->clcsock->ops->getsockopt(smc->clcsock, level, optname, in smc_getsockopt()
3169 mutex_unlock(&smc->clcsock_release_lock); in smc_getsockopt()
3178 struct smc_sock *smc; in smc_ioctl() local
3181 smc = smc_sk(sock->sk); in smc_ioctl()
3182 conn = &smc->conn; in smc_ioctl()
3183 lock_sock(&smc->sk); in smc_ioctl()
3184 if (smc->use_fallback) { in smc_ioctl()
3185 if (!smc->clcsock) { in smc_ioctl()
3186 release_sock(&smc->sk); in smc_ioctl()
3189 answ = smc->clcsock->ops->ioctl(smc->clcsock, cmd, arg); in smc_ioctl()
3190 release_sock(&smc->sk); in smc_ioctl()
3195 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3196 release_sock(&smc->sk); in smc_ioctl()
3199 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3200 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
3203 answ = atomic_read(&smc->conn.bytes_to_rcv); in smc_ioctl()
3207 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3208 release_sock(&smc->sk); in smc_ioctl()
3211 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3212 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
3215 answ = smc->conn.sndbuf_desc->len - in smc_ioctl()
3216 atomic_read(&smc->conn.sndbuf_space); in smc_ioctl()
3220 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3221 release_sock(&smc->sk); in smc_ioctl()
3224 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3225 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
3228 answ = smc_tx_prepared_sends(&smc->conn); in smc_ioctl()
3231 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3232 release_sock(&smc->sk); in smc_ioctl()
3235 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3236 smc->sk.sk_state == SMC_CLOSED) { in smc_ioctl()
3246 release_sock(&smc->sk); in smc_ioctl()
3249 release_sock(&smc->sk); in smc_ioctl()
3265 struct smc_sock *smc; in smc_splice_read() local
3268 smc = smc_sk(sk); in smc_splice_read()
3285 if (smc->use_fallback) { in smc_splice_read()
3286 rc = smc->clcsock->ops->splice_read(smc->clcsock, ppos, in smc_splice_read()
3297 SMC_STAT_INC(smc, splice_cnt); in smc_splice_read()
3298 rc = smc_rx_recvmsg(smc, NULL, pipe, len, flags); in smc_splice_read()
3330 struct smc_sock *smc = smc_sk(sk); in smc_create_clcsk() local
3334 &smc->clcsock); in smc_create_clcsk()
3340 /* smc_clcsock_release() does not wait smc->clcsock->sk's in smc_create_clcsk()
3342 * smc->sk is close()d, and TCP timers can be fired later, in smc_create_clcsk()
3345 sk = smc->clcsock->sk; in smc_create_clcsk()
3357 struct smc_sock *smc; in __smc_create() local
3377 smc = smc_sk(sk); in __smc_create()
3381 smc->clcsock = clcsock; in __smc_create()
3432 /* replace tcp socket to smc */ in smc_ulp_init()
3452 .name = "smc",
3646 MODULE_DESCRIPTION("smc socket address family");
3649 MODULE_ALIAS_TCP_ULP("smc");