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"
88 sock_net(skb->sk)->smc.limit_smc_hs)) in smc_nl_dump_hs_limitation()
102 sock_net(skb->sk)->smc.limit_smc_hs = true; in smc_nl_enable_hs_limitation()
108 sock_net(skb->sk)->smc.limit_smc_hs = false; in smc_nl_disable_hs_limitation()
114 struct smc_sock *smc = smc_sk(sk); in smc_set_keepalive() local
116 smc->clcsock->sk->sk_prot->keepalive(smc->clcsock->sk, val); in smc_set_keepalive()
126 struct smc_sock *smc; in smc_tcp_syn_recv_sock() local
129 smc = smc_clcsock_user_data(sk); in smc_tcp_syn_recv_sock()
131 if (READ_ONCE(sk->sk_ack_backlog) + atomic_read(&smc->queued_smc_hs) > in smc_tcp_syn_recv_sock()
135 if (sk_acceptq_is_full(&smc->sk)) { in smc_tcp_syn_recv_sock()
141 child = smc->ori_af_ops->syn_recv_sock(sk, skb, req, dst, req_unhash, in smc_tcp_syn_recv_sock()
143 /* child must not inherit smc or its ops */ in smc_tcp_syn_recv_sock()
149 inet_csk(child)->icsk_af_ops = smc->ori_af_ops; in smc_tcp_syn_recv_sock()
161 const struct smc_sock *smc; in smc_hs_congested() local
163 smc = smc_clcsock_user_data(sk); in smc_hs_congested()
165 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()
370 struct smc_sock *smc = smc_sk(sk); in smc_sk_init() local
375 WRITE_ONCE(sk->sk_sndbuf, 2 * READ_ONCE(net->smc.sysctl_wmem)); in smc_sk_init()
376 WRITE_ONCE(sk->sk_rcvbuf, 2 * READ_ONCE(net->smc.sysctl_rmem)); in smc_sk_init()
377 INIT_WORK(&smc->tcp_listen_work, smc_tcp_listen_work); in smc_sk_init()
378 INIT_WORK(&smc->connect_work, smc_connect_work); in smc_sk_init()
379 INIT_DELAYED_WORK(&smc->conn.tx_work, smc_tx_work); in smc_sk_init()
380 INIT_LIST_HEAD(&smc->accept_q); in smc_sk_init()
383 spin_lock_init(&smc->accept_q_lock); in smc_sk_init()
384 spin_lock_init(&smc->conn.send_lock); in smc_sk_init()
386 mutex_init(&smc->clcsock_release_lock); in smc_sk_init()
387 smc_init_saved_callbacks(smc); in smc_sk_init()
388 smc->limit_smc_hs = net->smc.limit_smc_hs; in smc_sk_init()
389 smc->use_fallback = false; /* assume rdma capability first */ in smc_sk_init()
390 smc->fallback_rsn = 0; in smc_sk_init()
391 smc_close_init(smc); in smc_sk_init()
416 struct smc_sock *smc; in smc_bind() local
419 smc = smc_sk(sk); in smc_bind()
440 if (sk->sk_state != SMC_INIT || smc->connect_nonblock) in smc_bind()
443 smc->clcsock->sk->sk_reuse = sk->sk_reuse; in smc_bind()
444 smc->clcsock->sk->sk_reuseport = sk->sk_reuseport; in smc_bind()
445 rc = kernel_bind(smc->clcsock, uaddr, addr_len); in smc_bind()
453 /* copy only relevant settings and flags of SOL_SOCKET level from smc to
454 * clc socket (since smc is not called for these options from net/core)
473 /* if set, use value set by setsockopt() - else use IPv4 or SMC sysctl value */
503 static void smc_copy_sock_settings_to_clc(struct smc_sock *smc) in smc_copy_sock_settings_to_clc() argument
505 smc_copy_sock_settings(smc->clcsock->sk, &smc->sk, SK_FLAGS_SMC_TO_CLC); in smc_copy_sock_settings_to_clc()
512 /* copy only settings and flags relevant for smc from clc to smc socket */
513 static void smc_copy_sock_settings_to_smc(struct smc_sock *smc) in smc_copy_sock_settings_to_smc() argument
515 smc_copy_sock_settings(&smc->sk, smc->clcsock->sk, SK_FLAGS_CLC_TO_SMC); in smc_copy_sock_settings_to_smc()
591 static int smcr_clnt_conf_first_link(struct smc_sock *smc) in smcr_clnt_conf_first_link() argument
593 struct smc_link *link = smc->conn.lnk; in smcr_clnt_conf_first_link()
607 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_clnt_conf_first_link()
624 if (smc->conn.sndbuf_desc->is_vm) { in smcr_clnt_conf_first_link()
625 if (smcr_link_reg_buf(link, smc->conn.sndbuf_desc)) in smcr_clnt_conf_first_link()
630 if (smcr_link_reg_buf(link, smc->conn.rmb_desc)) in smcr_clnt_conf_first_link()
634 smc->conn.rmb_desc->is_conf_rkey = true; in smcr_clnt_conf_first_link()
651 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_clnt_conf_first_link()
673 static void smc_conn_save_peer_info_fce(struct smc_sock *smc, in smc_conn_save_peer_info_fce() argument
683 if (smc->conn.lgr->is_smcd) { in smc_conn_save_peer_info_fce()
684 memcpy(smc->conn.lgr->negotiated_eid, clc->d1.eid, in smc_conn_save_peer_info_fce()
688 memcpy(smc->conn.lgr->negotiated_eid, clc->r1.eid, in smc_conn_save_peer_info_fce()
693 smc->conn.lgr->peer_os = fce->os_type; in smc_conn_save_peer_info_fce()
694 smc->conn.lgr->peer_smc_release = fce->release; in smc_conn_save_peer_info_fce()
696 memcpy(smc->conn.lgr->peer_hostname, fce->hostname, in smc_conn_save_peer_info_fce()
700 static void smcr_conn_save_peer_info(struct smc_sock *smc, in smcr_conn_save_peer_info() argument
705 smc->conn.peer_rmbe_idx = clc->r0.rmbe_idx; in smcr_conn_save_peer_info()
706 smc->conn.local_tx_ctrl.token = ntohl(clc->r0.rmbe_alert_token); in smcr_conn_save_peer_info()
707 smc->conn.peer_rmbe_size = bufsize; in smcr_conn_save_peer_info()
708 atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size); in smcr_conn_save_peer_info()
709 smc->conn.tx_off = bufsize * (smc->conn.peer_rmbe_idx - 1); in smcr_conn_save_peer_info()
712 static void smcd_conn_save_peer_info(struct smc_sock *smc, in smcd_conn_save_peer_info() argument
717 smc->conn.peer_rmbe_idx = clc->d0.dmbe_idx; in smcd_conn_save_peer_info()
718 smc->conn.peer_token = ntohll(clc->d0.token); in smcd_conn_save_peer_info()
720 smc->conn.peer_rmbe_size = bufsize - sizeof(struct smcd_cdc_msg); in smcd_conn_save_peer_info()
721 atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size); in smcd_conn_save_peer_info()
722 smc->conn.tx_off = bufsize * smc->conn.peer_rmbe_idx; in smcd_conn_save_peer_info()
725 static void smc_conn_save_peer_info(struct smc_sock *smc, in smc_conn_save_peer_info() argument
728 if (smc->conn.lgr->is_smcd) in smc_conn_save_peer_info()
729 smcd_conn_save_peer_info(smc, clc); in smc_conn_save_peer_info()
731 smcr_conn_save_peer_info(smc, clc); in smc_conn_save_peer_info()
732 smc_conn_save_peer_info_fce(smc, clc); in smc_conn_save_peer_info()
746 static void smc_stat_inc_fback_rsn_cnt(struct smc_sock *smc, in smc_stat_inc_fback_rsn_cnt() argument
752 if (fback_arr[cnt].fback_code == smc->fallback_rsn) { in smc_stat_inc_fback_rsn_cnt()
757 fback_arr[cnt].fback_code = smc->fallback_rsn; in smc_stat_inc_fback_rsn_cnt()
764 static void smc_stat_fallback(struct smc_sock *smc) in smc_stat_fallback() argument
766 struct net *net = sock_net(&smc->sk); in smc_stat_fallback()
768 mutex_lock(&net->smc.mutex_fback_rsn); in smc_stat_fallback()
769 if (smc->listen_smc) { in smc_stat_fallback()
770 smc_stat_inc_fback_rsn_cnt(smc, net->smc.fback_rsn->srv); in smc_stat_fallback()
771 net->smc.fback_rsn->srv_fback_cnt++; in smc_stat_fallback()
773 smc_stat_inc_fback_rsn_cnt(smc, net->smc.fback_rsn->clnt); in smc_stat_fallback()
774 net->smc.fback_rsn->clnt_fback_cnt++; in smc_stat_fallback()
776 mutex_unlock(&net->smc.mutex_fback_rsn); in smc_stat_fallback()
780 static void smc_fback_wakeup_waitqueue(struct smc_sock *smc, void *key) in smc_fback_wakeup_waitqueue() argument
785 wq = rcu_dereference(smc->sk.sk_wq); in smc_fback_wakeup_waitqueue()
789 /* wake up smc sk->sk_wq */ in smc_fback_wakeup_waitqueue()
815 static void smc_fback_forward_wakeup(struct smc_sock *smc, struct sock *clcsk, in smc_fback_forward_wakeup() argument
832 smc_fback_wakeup_waitqueue(smc, mark.key); in smc_fback_forward_wakeup()
839 struct smc_sock *smc; in smc_fback_state_change() local
842 smc = smc_clcsock_user_data(clcsk); in smc_fback_state_change()
843 if (smc) in smc_fback_state_change()
844 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_state_change()
845 smc->clcsk_state_change); in smc_fback_state_change()
851 struct smc_sock *smc; in smc_fback_data_ready() local
854 smc = smc_clcsock_user_data(clcsk); in smc_fback_data_ready()
855 if (smc) in smc_fback_data_ready()
856 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_data_ready()
857 smc->clcsk_data_ready); in smc_fback_data_ready()
863 struct smc_sock *smc; in smc_fback_write_space() local
866 smc = smc_clcsock_user_data(clcsk); in smc_fback_write_space()
867 if (smc) in smc_fback_write_space()
868 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_write_space()
869 smc->clcsk_write_space); in smc_fback_write_space()
875 struct smc_sock *smc; in smc_fback_error_report() local
878 smc = smc_clcsock_user_data(clcsk); in smc_fback_error_report()
879 if (smc) in smc_fback_error_report()
880 smc_fback_forward_wakeup(smc, clcsk, in smc_fback_error_report()
881 smc->clcsk_error_report); in smc_fback_error_report()
885 static void smc_fback_replace_callbacks(struct smc_sock *smc) in smc_fback_replace_callbacks() argument
887 struct sock *clcsk = smc->clcsock->sk; in smc_fback_replace_callbacks()
890 clcsk->sk_user_data = (void *)((uintptr_t)smc | SK_USER_DATA_NOCOPY); in smc_fback_replace_callbacks()
893 &smc->clcsk_state_change); in smc_fback_replace_callbacks()
895 &smc->clcsk_data_ready); in smc_fback_replace_callbacks()
897 &smc->clcsk_write_space); in smc_fback_replace_callbacks()
899 &smc->clcsk_error_report); in smc_fback_replace_callbacks()
904 static int smc_switch_to_fallback(struct smc_sock *smc, int reason_code) in smc_switch_to_fallback() argument
908 mutex_lock(&smc->clcsock_release_lock); in smc_switch_to_fallback()
909 if (!smc->clcsock) { in smc_switch_to_fallback()
914 smc->use_fallback = true; in smc_switch_to_fallback()
915 smc->fallback_rsn = reason_code; in smc_switch_to_fallback()
916 smc_stat_fallback(smc); in smc_switch_to_fallback()
917 trace_smc_switch_to_fallback(smc, reason_code); in smc_switch_to_fallback()
918 if (smc->sk.sk_socket && smc->sk.sk_socket->file) { in smc_switch_to_fallback()
919 smc->clcsock->file = smc->sk.sk_socket->file; in smc_switch_to_fallback()
920 smc->clcsock->file->private_data = smc->clcsock; in smc_switch_to_fallback()
921 smc->clcsock->wq.fasync_list = in smc_switch_to_fallback()
922 smc->sk.sk_socket->wq.fasync_list; in smc_switch_to_fallback()
923 smc->sk.sk_socket->wq.fasync_list = NULL; in smc_switch_to_fallback()
926 * in smc sk->sk_wq and they should be woken up in smc_switch_to_fallback()
929 smc_fback_replace_callbacks(smc); in smc_switch_to_fallback()
932 mutex_unlock(&smc->clcsock_release_lock); in smc_switch_to_fallback()
937 static int smc_connect_fallback(struct smc_sock *smc, int reason_code) in smc_connect_fallback() argument
939 struct net *net = sock_net(&smc->sk); in smc_connect_fallback()
942 rc = smc_switch_to_fallback(smc, reason_code); in smc_connect_fallback()
944 this_cpu_inc(net->smc.smc_stats->clnt_hshake_err_cnt); in smc_connect_fallback()
945 if (smc->sk.sk_state == SMC_INIT) in smc_connect_fallback()
946 sock_put(&smc->sk); /* passive closing */ in smc_connect_fallback()
949 smc_copy_sock_settings_to_clc(smc); in smc_connect_fallback()
950 smc->connect_nonblock = 0; in smc_connect_fallback()
951 if (smc->sk.sk_state == SMC_INIT) in smc_connect_fallback()
952 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_fallback()
957 static int smc_connect_decline_fallback(struct smc_sock *smc, int reason_code, in smc_connect_decline_fallback() argument
960 struct net *net = sock_net(&smc->sk); in smc_connect_decline_fallback()
964 this_cpu_inc(net->smc.smc_stats->clnt_hshake_err_cnt); in smc_connect_decline_fallback()
965 if (smc->sk.sk_state == SMC_INIT) in smc_connect_decline_fallback()
966 sock_put(&smc->sk); /* passive closing */ in smc_connect_decline_fallback()
970 rc = smc_clc_send_decline(smc, reason_code, version); in smc_connect_decline_fallback()
972 this_cpu_inc(net->smc.smc_stats->clnt_hshake_err_cnt); in smc_connect_decline_fallback()
973 if (smc->sk.sk_state == SMC_INIT) in smc_connect_decline_fallback()
974 sock_put(&smc->sk); /* passive closing */ in smc_connect_decline_fallback()
978 return smc_connect_fallback(smc, reason_code); in smc_connect_decline_fallback()
981 static void smc_conn_abort(struct smc_sock *smc, int local_first) in smc_conn_abort() argument
983 struct smc_connection *conn = &smc->conn; in smc_conn_abort()
997 static int smc_find_rdma_device(struct smc_sock *smc, struct smc_init_info *ini) in smc_find_rdma_device() argument
1003 smc_pnet_find_roce_resource(smc->clcsock->sk, ini); in smc_find_rdma_device()
1013 static int smc_find_ism_device(struct smc_sock *smc, struct smc_init_info *ini) in smc_find_ism_device() argument
1016 smc_pnet_find_ism_resource(smc->clcsock->sk, ini); in smc_find_ism_device()
1039 static int smc_find_ism_v2_device_clnt(struct smc_sock *smc, in smc_find_ism_v2_device_clnt() argument
1059 smc_pnet_is_ndev_pnetid(sock_net(&smc->sk), smcd->pnetid)) { in smc_find_ism_v2_device_clnt()
1062 * Proposal SMC-Dv2 extension, but an Emulated- in smc_find_ism_v2_device_clnt()
1086 static int smc_connect_ism_vlan_setup(struct smc_sock *smc, in smc_connect_ism_vlan_setup() argument
1094 static int smc_find_proposal_devices(struct smc_sock *smc, in smc_find_proposal_devices() argument
1101 smc_find_ism_device(smc, ini) || in smc_find_proposal_devices()
1102 smc_connect_ism_vlan_setup(smc, ini)) in smc_find_proposal_devices()
1108 smc_find_rdma_device(smc, ini)) in smc_find_proposal_devices()
1118 smc_find_ism_v2_device_clnt(smc, ini)) in smc_find_proposal_devices()
1123 ini->smcrv2.saddr = smc->clcsock->sk->sk_rcv_saddr; in smc_find_proposal_devices()
1126 (smc->clcsock->sk->sk_family == AF_INET6 && in smc_find_proposal_devices()
1127 !ipv6_addr_v4mapped(&smc->clcsock->sk->sk_v6_rcv_saddr)) || in smc_find_proposal_devices()
1130 smc_find_rdma_device(smc, ini)) in smc_find_proposal_devices()
1147 static int smc_connect_ism_vlan_cleanup(struct smc_sock *smc, in smc_connect_ism_vlan_cleanup() argument
1163 static int smc_connect_clc(struct smc_sock *smc, in smc_connect_clc() argument
1170 rc = smc_clc_send_proposal(smc, ini); in smc_connect_clc()
1173 /* receive SMC Accept CLC message */ in smc_connect_clc()
1174 return smc_clc_wait_msg(smc, aclc, SMC_CLC_MAX_ACCEPT_LEN, in smc_connect_clc()
1206 static int smc_connect_rdma_v2_prepare(struct smc_sock *smc, in smc_connect_rdma_v2_prepare() argument
1212 struct net *net = sock_net(&smc->sk); in smc_connect_rdma_v2_prepare()
1222 if (smc_ib_find_route(net, smc->clcsock->sk->sk_rcv_saddr, in smc_connect_rdma_v2_prepare()
1242 static int smc_connect_rdma(struct smc_sock *smc, in smc_connect_rdma() argument
1259 reason_code = smc_connect_rdma_v2_prepare(smc, aclc, ini); in smc_connect_rdma()
1264 reason_code = smc_conn_create(smc, ini); in smc_connect_rdma()
1270 smc_conn_save_peer_info(smc, aclc); in smc_connect_rdma()
1273 link = smc->conn.lnk; in smc_connect_rdma()
1278 struct smc_link *l = &smc->conn.lgr->lnk[i]; in smc_connect_rdma()
1294 smc_switch_link_and_count(&smc->conn, link); in smc_connect_rdma()
1298 if (smc_buf_create(smc, false)) { in smc_connect_rdma()
1306 if (smc_rmb_rtoken_handling(&smc->conn, link, aclc)) { in smc_connect_rdma()
1311 smc_rx_init(smc); in smc_connect_rdma()
1320 if (smc->conn.sndbuf_desc->is_vm) { in smc_connect_rdma()
1321 if (smcr_lgr_reg_sndbufs(link, smc->conn.sndbuf_desc)) { in smc_connect_rdma()
1326 if (smcr_lgr_reg_rmbs(link, smc->conn.rmb_desc)) { in smc_connect_rdma()
1339 reason_code = smc_clc_send_confirm(smc, ini->first_contact_local, in smc_connect_rdma()
1344 smc_tx_init(smc); in smc_connect_rdma()
1349 reason_code = smcr_clnt_conf_first_link(smc); in smc_connect_rdma()
1356 smc_copy_sock_settings_to_clc(smc); in smc_connect_rdma()
1357 smc->connect_nonblock = 0; in smc_connect_rdma()
1358 if (smc->sk.sk_state == SMC_INIT) in smc_connect_rdma()
1359 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_rdma()
1363 smc_conn_abort(smc, ini->first_contact_local); in smc_connect_rdma()
1365 smc->connect_nonblock = 0; in smc_connect_rdma()
1390 static int smc_connect_ism(struct smc_sock *smc, in smc_connect_ism() argument
1422 /* there is only one lgr role for SMC-D; use server lock */ in smc_connect_ism()
1424 rc = smc_conn_create(smc, ini); in smc_connect_ism()
1431 rc = smc_buf_create(smc, true); in smc_connect_ism()
1437 smc_conn_save_peer_info(smc, aclc); in smc_connect_ism()
1439 if (smc_ism_support_dmb_nocopy(smc->conn.lgr->smcd)) { in smc_connect_ism()
1440 rc = smcd_buf_attach(smc); in smc_connect_ism()
1446 smc_rx_init(smc); in smc_connect_ism()
1447 smc_tx_init(smc); in smc_connect_ism()
1452 rc = smc_clc_send_confirm(smc, ini->first_contact_local, in smc_connect_ism()
1458 smc_copy_sock_settings_to_clc(smc); in smc_connect_ism()
1459 smc->connect_nonblock = 0; in smc_connect_ism()
1460 if (smc->sk.sk_state == SMC_INIT) in smc_connect_ism()
1461 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_ism()
1465 smc_conn_abort(smc, ini->first_contact_local); in smc_connect_ism()
1467 smc->connect_nonblock = 0; in smc_connect_ism()
1494 static int __smc_connect(struct smc_sock *smc) in __smc_connect() argument
1502 if (smc->use_fallback) in __smc_connect()
1503 return smc_connect_fallback(smc, smc->fallback_rsn); in __smc_connect()
1505 /* if peer has not signalled SMC-capability, fall back */ in __smc_connect()
1506 if (!tcp_sk(smc->clcsock->sk)->syn_smc) in __smc_connect()
1507 return smc_connect_fallback(smc, SMC_CLC_DECL_PEERNOSMC); in __smc_connect()
1509 /* IPSec connections opt out of SMC optimizations */ in __smc_connect()
1510 if (using_ipsec(smc)) in __smc_connect()
1511 return smc_connect_decline_fallback(smc, SMC_CLC_DECL_IPSEC, in __smc_connect()
1516 return smc_connect_decline_fallback(smc, SMC_CLC_DECL_MEM, in __smc_connect()
1525 if (smc_vlan_by_tcpsk(smc->clcsock, ini)) { in __smc_connect()
1531 rc = smc_find_proposal_devices(smc, ini); in __smc_connect()
1543 rc = smc_connect_clc(smc, aclc, ini); in __smc_connect()
1548 smc->sk.sk_err = ETIMEDOUT; in __smc_connect()
1553 /* check if smc modes and versions of CLC proposal and accept match */ in __smc_connect()
1562 rc = smc_connect_rdma(smc, aclc, ini); in __smc_connect()
1565 rc = smc_connect_ism(smc, aclc, ini); in __smc_connect()
1570 SMC_STAT_CLNT_SUCC_INC(sock_net(smc->clcsock->sk), aclc); in __smc_connect()
1571 smc_connect_ism_vlan_cleanup(smc, ini); in __smc_connect()
1577 smc_connect_ism_vlan_cleanup(smc, ini); in __smc_connect()
1581 return smc_connect_decline_fallback(smc, rc, version); in __smc_connect()
1586 struct smc_sock *smc = container_of(work, struct smc_sock, in smc_connect_work() local
1588 long timeo = smc->sk.sk_sndtimeo; in smc_connect_work()
1593 lock_sock(smc->clcsock->sk); in smc_connect_work()
1594 if (smc->clcsock->sk->sk_err) { in smc_connect_work()
1595 smc->sk.sk_err = smc->clcsock->sk->sk_err; in smc_connect_work()
1596 } else if ((1 << smc->clcsock->sk->sk_state) & in smc_connect_work()
1598 rc = sk_stream_wait_connect(smc->clcsock->sk, &timeo); in smc_connect_work()
1600 ((1 << smc->clcsock->sk->sk_state) & in smc_connect_work()
1604 release_sock(smc->clcsock->sk); in smc_connect_work()
1605 lock_sock(&smc->sk); in smc_connect_work()
1606 if (rc != 0 || smc->sk.sk_err) { in smc_connect_work()
1607 smc->sk.sk_state = SMC_CLOSED; in smc_connect_work()
1609 smc->sk.sk_err = EPIPE; in smc_connect_work()
1611 smc->sk.sk_err = ECONNREFUSED; in smc_connect_work()
1613 smc->sk.sk_err = -sock_intr_errno(timeo); in smc_connect_work()
1614 sock_put(&smc->sk); /* passive closing */ in smc_connect_work()
1618 rc = __smc_connect(smc); in smc_connect_work()
1620 smc->sk.sk_err = -rc; in smc_connect_work()
1623 if (!sock_flag(&smc->sk, SOCK_DEAD)) { in smc_connect_work()
1624 if (smc->sk.sk_err) { in smc_connect_work()
1625 smc->sk.sk_state_change(&smc->sk); in smc_connect_work()
1627 smc->clcsock->sk->sk_write_space(smc->clcsock->sk); in smc_connect_work()
1628 smc->sk.sk_write_space(&smc->sk); in smc_connect_work()
1631 release_sock(&smc->sk); in smc_connect_work()
1638 struct smc_sock *smc; in smc_connect() local
1641 smc = smc_sk(sk); in smc_connect()
1643 /* separate smc parameter checking to be safe */ in smc_connect()
1680 smc_copy_sock_settings_to_clc(smc); in smc_connect()
1681 tcp_sk(smc->clcsock->sk)->syn_smc = 1; in smc_connect()
1682 if (smc->connect_nonblock) { in smc_connect()
1686 rc = kernel_connect(smc->clcsock, addr, alen, flags); in smc_connect()
1690 if (smc->use_fallback) { in smc_connect()
1694 sock_hold(&smc->sk); /* sock put in passive closing */ in smc_connect()
1696 if (queue_work(smc_hs_wq, &smc->connect_work)) in smc_connect()
1697 smc->connect_nonblock = 1; in smc_connect()
1701 rc = __smc_connect(smc); in smc_connect()
1751 /* new clcsock has inherited the smc listen-specific sk_data_ready in smc_clcsock_accept()
1837 struct smc_sock *smc = smc_sk(sk); in smc_close_non_accepted() local
1844 __smc_release(smc); in smc_close_non_accepted()
1850 static int smcr_serv_conf_first_link(struct smc_sock *smc) in smcr_serv_conf_first_link() argument
1852 struct smc_link *link = smc->conn.lnk; in smcr_serv_conf_first_link()
1857 if (smc->conn.sndbuf_desc->is_vm) { in smcr_serv_conf_first_link()
1858 if (smcr_link_reg_buf(link, smc->conn.sndbuf_desc)) in smcr_serv_conf_first_link()
1863 if (smcr_link_reg_buf(link, smc->conn.rmb_desc)) in smcr_serv_conf_first_link()
1877 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_serv_conf_first_link()
1888 smc->conn.rmb_desc->is_conf_rkey = true; in smcr_serv_conf_first_link()
1942 this_cpu_inc(net->smc.smc_stats->srv_hshake_err_cnt); in smc_listen_out_err()
2071 /* listen worker: initialize connection and buffers for SMC-D */
2449 /* check if peer is smc capable */ in smc_listen_work()
2460 * wait for and receive SMC Proposal CLC message in smc_listen_work()
2476 /* IPSec connections opt out of SMC optimizations */ in smc_listen_work()
2506 /* send SMC Accept CLC message */ in smc_listen_work()
2513 /* SMC-D does not need this lock any more */ in smc_listen_work()
2517 /* receive SMC Confirm CLC message */ in smc_listen_work()
2535 /* fce smc release version is needed in smc_listen_rdma_finish, in smc_listen_work()
2627 struct smc_sock *smc; in smc_listen() local
2630 smc = smc_sk(sk); in smc_listen()
2635 smc->connect_nonblock || sock->state != SS_UNCONNECTED) in smc_listen()
2644 * them to the clc socket -- copy smc socket options to clc socket in smc_listen()
2646 smc_copy_sock_settings_to_clc(smc); in smc_listen()
2647 if (!smc->use_fallback) in smc_listen()
2648 tcp_sk(smc->clcsock->sk)->syn_smc = 1; in smc_listen()
2651 * smc-specific sk_data_ready function in smc_listen()
2653 write_lock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2654 smc->clcsock->sk->sk_user_data = in smc_listen()
2655 (void *)((uintptr_t)smc | SK_USER_DATA_NOCOPY); in smc_listen()
2656 smc_clcsock_replace_cb(&smc->clcsock->sk->sk_data_ready, in smc_listen()
2657 smc_clcsock_data_ready, &smc->clcsk_data_ready); in smc_listen()
2658 write_unlock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2661 smc->ori_af_ops = inet_csk(smc->clcsock->sk)->icsk_af_ops; in smc_listen()
2663 smc->af_ops = *smc->ori_af_ops; in smc_listen()
2664 smc->af_ops.syn_recv_sock = smc_tcp_syn_recv_sock; in smc_listen()
2666 inet_csk(smc->clcsock->sk)->icsk_af_ops = &smc->af_ops; in smc_listen()
2668 if (smc->limit_smc_hs) in smc_listen()
2669 tcp_sk(smc->clcsock->sk)->smc_hs_congested = smc_hs_congested; in smc_listen()
2671 rc = kernel_listen(smc->clcsock, backlog); in smc_listen()
2673 write_lock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2674 smc_clcsock_restore_cb(&smc->clcsock->sk->sk_data_ready, in smc_listen()
2675 &smc->clcsk_data_ready); in smc_listen()
2676 smc->clcsock->sk->sk_user_data = NULL; in smc_listen()
2677 write_unlock_bh(&smc->clcsock->sk->sk_callback_lock); in smc_listen()
2762 struct smc_sock *smc; in smc_getname() local
2768 smc = smc_sk(sock->sk); in smc_getname()
2770 return smc->clcsock->ops->getname(smc->clcsock, addr, peer); in smc_getname()
2776 struct smc_sock *smc; in smc_sendmsg() local
2779 smc = smc_sk(sk); in smc_sendmsg()
2782 /* SMC does not support connect with fastopen */ in smc_sendmsg()
2785 if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) { in smc_sendmsg()
2786 rc = smc_switch_to_fallback(smc, SMC_CLC_DECL_OPTUNSUPP); in smc_sendmsg()
2800 if (smc->use_fallback) { in smc_sendmsg()
2801 rc = smc->clcsock->ops->sendmsg(smc->clcsock, msg, len); in smc_sendmsg()
2803 rc = smc_tx_sendmsg(smc, msg, len); in smc_sendmsg()
2804 SMC_STAT_TX_PAYLOAD(smc, len, rc); in smc_sendmsg()
2815 struct smc_sock *smc; in smc_recvmsg() local
2818 smc = smc_sk(sk); in smc_recvmsg()
2835 if (smc->use_fallback) { in smc_recvmsg()
2836 rc = smc->clcsock->ops->recvmsg(smc->clcsock, msg, len, flags); in smc_recvmsg()
2839 rc = smc_rx_recvmsg(smc, msg, NULL, len, flags); in smc_recvmsg()
2840 SMC_STAT_RX_PAYLOAD(smc, rc, rc); in smc_recvmsg()
2865 struct smc_sock *smc; in smc_poll() local
2871 smc = smc_sk(sock->sk); in smc_poll()
2872 if (smc->use_fallback) { in smc_poll()
2874 mask = smc->clcsock->ops->poll(file, smc->clcsock, wait); in smc_poll()
2875 sk->sk_err = smc->clcsock->sk->sk_err; in smc_poll()
2887 } else if (smc->use_fallback) { /* as result of connect_work()*/ in smc_poll()
2888 mask |= smc->clcsock->ops->poll(file, smc->clcsock, in smc_poll()
2890 sk->sk_err = smc->clcsock->sk->sk_err; in smc_poll()
2893 atomic_read(&smc->conn.sndbuf_space)) || in smc_poll()
2903 if (atomic_read(&smc->conn.sndbuf_space)) in smc_poll()
2907 if (atomic_read(&smc->conn.bytes_to_rcv)) in smc_poll()
2913 if (smc->conn.urg_state == SMC_URG_VALID) in smc_poll()
2925 struct smc_sock *smc; in smc_shutdown() local
2930 smc = smc_sk(sk); in smc_shutdown()
2956 if (smc->use_fallback) { in smc_shutdown()
2957 rc = kernel_sock_shutdown(smc->clcsock, how); in smc_shutdown()
2958 sk->sk_shutdown = smc->clcsock->sk->sk_shutdown; in smc_shutdown()
2969 rc = smc_close_active(smc); in smc_shutdown()
2975 rc = smc_close_shutdown_write(smc); in smc_shutdown()
2982 if (do_shutdown && smc->clcsock) in smc_shutdown()
2983 rc1 = kernel_sock_shutdown(smc->clcsock, how); in smc_shutdown()
2999 struct smc_sock *smc; in __smc_getsockopt() local
3002 smc = smc_sk(sock->sk); in __smc_getsockopt()
3014 val = smc->limit_smc_hs; in __smc_getsockopt()
3032 struct smc_sock *smc; in __smc_setsockopt() local
3035 smc = smc_sk(sk); in __smc_setsockopt()
3049 smc->limit_smc_hs = !!val; in __smc_setsockopt()
3065 struct smc_sock *smc; in smc_setsockopt() local
3073 smc = smc_sk(sk); in smc_setsockopt()
3078 mutex_lock(&smc->clcsock_release_lock); in smc_setsockopt()
3079 if (!smc->clcsock) { in smc_setsockopt()
3080 mutex_unlock(&smc->clcsock_release_lock); in smc_setsockopt()
3083 if (unlikely(!smc->clcsock->ops->setsockopt)) in smc_setsockopt()
3086 rc = smc->clcsock->ops->setsockopt(smc->clcsock, level, optname, in smc_setsockopt()
3088 if (smc->clcsock->sk->sk_err) { in smc_setsockopt()
3089 sk->sk_err = smc->clcsock->sk->sk_err; in smc_setsockopt()
3092 mutex_unlock(&smc->clcsock_release_lock); in smc_setsockopt()
3100 if (rc || smc->use_fallback) in smc_setsockopt()
3107 /* option not supported by SMC */ in smc_setsockopt()
3108 if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) { in smc_setsockopt()
3109 rc = smc_switch_to_fallback(smc, SMC_CLC_DECL_OPTUNSUPP); in smc_setsockopt()
3119 SMC_STAT_INC(smc, ndly_cnt); in smc_setsockopt()
3120 smc_tx_pending(&smc->conn); in smc_setsockopt()
3121 cancel_delayed_work(&smc->conn.tx_work); in smc_setsockopt()
3130 SMC_STAT_INC(smc, cork_cnt); in smc_setsockopt()
3131 smc_tx_pending(&smc->conn); in smc_setsockopt()
3132 cancel_delayed_work(&smc->conn.tx_work); in smc_setsockopt()
3137 smc->sockopt_defer_accept = val; in smc_setsockopt()
3151 struct smc_sock *smc; in smc_getsockopt() local
3157 smc = smc_sk(sock->sk); in smc_getsockopt()
3158 mutex_lock(&smc->clcsock_release_lock); in smc_getsockopt()
3159 if (!smc->clcsock) { in smc_getsockopt()
3160 mutex_unlock(&smc->clcsock_release_lock); in smc_getsockopt()
3164 if (unlikely(!smc->clcsock->ops->getsockopt)) { in smc_getsockopt()
3165 mutex_unlock(&smc->clcsock_release_lock); in smc_getsockopt()
3168 rc = smc->clcsock->ops->getsockopt(smc->clcsock, level, optname, in smc_getsockopt()
3170 mutex_unlock(&smc->clcsock_release_lock); in smc_getsockopt()
3179 struct smc_sock *smc; in smc_ioctl() local
3182 smc = smc_sk(sock->sk); in smc_ioctl()
3183 conn = &smc->conn; in smc_ioctl()
3184 lock_sock(&smc->sk); in smc_ioctl()
3185 if (smc->use_fallback) { in smc_ioctl()
3186 if (!smc->clcsock) { in smc_ioctl()
3187 release_sock(&smc->sk); in smc_ioctl()
3190 answ = smc->clcsock->ops->ioctl(smc->clcsock, cmd, arg); in smc_ioctl()
3191 release_sock(&smc->sk); in smc_ioctl()
3196 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3197 release_sock(&smc->sk); in smc_ioctl()
3200 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3201 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
3204 answ = atomic_read(&smc->conn.bytes_to_rcv); in smc_ioctl()
3208 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3209 release_sock(&smc->sk); in smc_ioctl()
3212 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3213 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
3216 answ = smc->conn.sndbuf_desc->len - in smc_ioctl()
3217 atomic_read(&smc->conn.sndbuf_space); in smc_ioctl()
3221 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3222 release_sock(&smc->sk); in smc_ioctl()
3225 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3226 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
3229 answ = smc_tx_prepared_sends(&smc->conn); in smc_ioctl()
3232 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
3233 release_sock(&smc->sk); in smc_ioctl()
3236 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
3237 smc->sk.sk_state == SMC_CLOSED) { in smc_ioctl()
3247 release_sock(&smc->sk); in smc_ioctl()
3250 release_sock(&smc->sk); in smc_ioctl()
3266 struct smc_sock *smc; in smc_splice_read() local
3269 smc = smc_sk(sk); in smc_splice_read()
3286 if (smc->use_fallback) { in smc_splice_read()
3287 rc = smc->clcsock->ops->splice_read(smc->clcsock, ppos, in smc_splice_read()
3298 SMC_STAT_INC(smc, splice_cnt); in smc_splice_read()
3299 rc = smc_rx_recvmsg(smc, NULL, pipe, len, flags); in smc_splice_read()
3331 struct smc_sock *smc = smc_sk(sk); in smc_create_clcsk() local
3335 &smc->clcsock); in smc_create_clcsk()
3339 /* smc_clcsock_release() does not wait smc->clcsock->sk's in smc_create_clcsk()
3341 * smc->sk is close()d, and TCP timers can be fired later, in smc_create_clcsk()
3344 sk = smc->clcsock->sk; in smc_create_clcsk()
3353 struct smc_sock *smc; in __smc_create() local
3373 smc = smc_sk(sk); in __smc_create()
3377 smc->clcsock = clcsock; in __smc_create()
3433 /* replace tcp socket to smc */ in smc_ulp_init()
3453 .name = "smc",
3662 MODULE_DESCRIPTION("smc socket address family");
3665 MODULE_ALIAS_TCP_ULP("smc");