Lines Matching +full:smc +full:- +full:id
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
7 * offers an alternative communication option for TCP-protocol sockets
8 * applicable with RoCE-cards only
11 * - support for alternate links postponed
19 #define KMSG_COMPONENT "smc"
33 #include <net/smc.h>
40 #include "smc.h"
67 struct smc_sock *smc = smc_sk(sk); in smc_set_keepalive() local
69 smc->clcsock->sk->sk_prot->keepalive(smc->clcsock->sk, val); in smc_set_keepalive()
82 struct smc_hashinfo *h = sk->sk_prot->h.smc_hash; in smc_hash_sk()
85 head = &h->ht; in smc_hash_sk()
87 write_lock_bh(&h->lock); in smc_hash_sk()
89 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); in smc_hash_sk()
90 write_unlock_bh(&h->lock); in smc_hash_sk()
98 struct smc_hashinfo *h = sk->sk_prot->h.smc_hash; in smc_unhash_sk()
100 write_lock_bh(&h->lock); in smc_unhash_sk()
102 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); in smc_unhash_sk()
103 write_unlock_bh(&h->lock); in smc_unhash_sk()
108 .name = "SMC",
131 static void smc_restore_fallback_changes(struct smc_sock *smc) in smc_restore_fallback_changes() argument
133 if (smc->clcsock->file) { /* non-accepted sockets have no file yet */ in smc_restore_fallback_changes()
134 smc->clcsock->file->private_data = smc->sk.sk_socket; in smc_restore_fallback_changes()
135 smc->clcsock->file = NULL; in smc_restore_fallback_changes()
139 static int __smc_release(struct smc_sock *smc) in __smc_release() argument
141 struct sock *sk = &smc->sk; in __smc_release()
144 if (!smc->use_fallback) { in __smc_release()
145 rc = smc_close_active(smc); in __smc_release()
147 sk->sk_shutdown |= SHUTDOWN_MASK; in __smc_release()
149 if (sk->sk_state != SMC_LISTEN && sk->sk_state != SMC_INIT) in __smc_release()
151 if (sk->sk_state == SMC_LISTEN) { in __smc_release()
153 rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR); in __smc_release()
155 sk->sk_state = SMC_CLOSED; in __smc_release()
156 sk->sk_state_change(sk); in __smc_release()
157 smc_restore_fallback_changes(smc); in __smc_release()
160 sk->sk_prot->unhash(sk); in __smc_release()
162 if (sk->sk_state == SMC_CLOSED) { in __smc_release()
163 if (smc->clcsock) { in __smc_release()
165 smc_clcsock_release(smc); in __smc_release()
168 if (!smc->use_fallback) in __smc_release()
169 smc_conn_free(&smc->conn); in __smc_release()
177 struct sock *sk = sock->sk; in smc_release()
178 struct smc_sock *smc; in smc_release() local
185 smc = smc_sk(sk); in smc_release()
187 /* cleanup for a dangling non-blocking connect */ in smc_release()
188 if (smc->connect_nonblock && sk->sk_state == SMC_INIT) in smc_release()
189 tcp_abort(smc->clcsock->sk, ECONNABORTED); in smc_release()
190 flush_work(&smc->connect_work); in smc_release()
192 if (sk->sk_state == SMC_LISTEN) in smc_release()
200 rc = __smc_release(smc); in smc_release()
204 sock->sk = NULL; in smc_release()
215 if (sk->sk_state != SMC_CLOSED) in smc_destruct()
226 struct smc_sock *smc; in smc_sock_alloc() local
236 sk->sk_state = SMC_INIT; in smc_sock_alloc()
237 sk->sk_destruct = smc_destruct; in smc_sock_alloc()
238 sk->sk_protocol = protocol; in smc_sock_alloc()
239 smc = smc_sk(sk); in smc_sock_alloc()
240 INIT_WORK(&smc->tcp_listen_work, smc_tcp_listen_work); in smc_sock_alloc()
241 INIT_WORK(&smc->connect_work, smc_connect_work); in smc_sock_alloc()
242 INIT_DELAYED_WORK(&smc->conn.tx_work, smc_tx_work); in smc_sock_alloc()
243 INIT_LIST_HEAD(&smc->accept_q); in smc_sock_alloc()
244 spin_lock_init(&smc->accept_q_lock); in smc_sock_alloc()
245 spin_lock_init(&smc->conn.send_lock); in smc_sock_alloc()
246 sk->sk_prot->hash(sk); in smc_sock_alloc()
248 mutex_init(&smc->clcsock_release_lock); in smc_sock_alloc()
257 struct sock *sk = sock->sk; in smc_bind()
258 struct smc_sock *smc; in smc_bind() local
261 smc = smc_sk(sk); in smc_bind()
264 rc = -EINVAL; in smc_bind()
268 rc = -EAFNOSUPPORT; in smc_bind()
269 if (addr->sin_family != AF_INET && in smc_bind()
270 addr->sin_family != AF_INET6 && in smc_bind()
271 addr->sin_family != AF_UNSPEC) in smc_bind()
274 if (addr->sin_family == AF_UNSPEC && in smc_bind()
275 addr->sin_addr.s_addr != htonl(INADDR_ANY)) in smc_bind()
281 rc = -EINVAL; in smc_bind()
282 if (sk->sk_state != SMC_INIT || smc->connect_nonblock) in smc_bind()
285 smc->clcsock->sk->sk_reuse = sk->sk_reuse; in smc_bind()
286 rc = kernel_bind(smc->clcsock, uaddr, addr_len); in smc_bind()
298 nsk->sk_type = osk->sk_type; in smc_copy_sock_settings()
299 nsk->sk_sndbuf = osk->sk_sndbuf; in smc_copy_sock_settings()
300 nsk->sk_rcvbuf = osk->sk_rcvbuf; in smc_copy_sock_settings()
301 nsk->sk_sndtimeo = osk->sk_sndtimeo; in smc_copy_sock_settings()
302 nsk->sk_rcvtimeo = osk->sk_rcvtimeo; in smc_copy_sock_settings()
303 nsk->sk_mark = osk->sk_mark; in smc_copy_sock_settings()
304 nsk->sk_priority = osk->sk_priority; in smc_copy_sock_settings()
305 nsk->sk_rcvlowat = osk->sk_rcvlowat; in smc_copy_sock_settings()
306 nsk->sk_bound_dev_if = osk->sk_bound_dev_if; in smc_copy_sock_settings()
307 nsk->sk_err = osk->sk_err; in smc_copy_sock_settings()
309 nsk->sk_flags &= ~mask; in smc_copy_sock_settings()
310 nsk->sk_flags |= osk->sk_flags & mask; in smc_copy_sock_settings()
328 /* copy only relevant settings and flags of SOL_SOCKET level from smc to
329 * clc socket (since smc is not called for these options from net/core)
331 static void smc_copy_sock_settings_to_clc(struct smc_sock *smc) in smc_copy_sock_settings_to_clc() argument
333 smc_copy_sock_settings(smc->clcsock->sk, &smc->sk, SK_FLAGS_SMC_TO_CLC); in smc_copy_sock_settings_to_clc()
340 /* copy only settings and flags relevant for smc from clc to smc socket */
341 static void smc_copy_sock_settings_to_smc(struct smc_sock *smc) in smc_copy_sock_settings_to_smc() argument
343 smc_copy_sock_settings(&smc->sk, smc->clcsock->sk, SK_FLAGS_CLC_TO_SMC); in smc_copy_sock_settings_to_smc()
350 struct smc_link_group *lgr = link->lgr; in smcr_lgr_reg_rmbs()
359 mutex_lock(&lgr->llc_conf_mutex); in smcr_lgr_reg_rmbs()
361 if (!smc_link_active(&lgr->lnk[i])) in smcr_lgr_reg_rmbs()
363 rc = smcr_link_reg_rmb(&lgr->lnk[i], rmb_desc); in smcr_lgr_reg_rmbs()
371 rc = -EFAULT; in smcr_lgr_reg_rmbs()
374 rmb_desc->is_conf_rkey = true; in smcr_lgr_reg_rmbs()
376 mutex_unlock(&lgr->llc_conf_mutex); in smcr_lgr_reg_rmbs()
377 smc_llc_flow_stop(lgr, &lgr->llc_flow_lcl); in smcr_lgr_reg_rmbs()
381 static int smcr_clnt_conf_first_link(struct smc_sock *smc) in smcr_clnt_conf_first_link() argument
383 struct smc_link *link = smc->conn.lnk; in smcr_clnt_conf_first_link()
388 qentry = smc_llc_wait(link->lgr, NULL, SMC_LLC_WAIT_TIME, in smcr_clnt_conf_first_link()
393 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_clnt_conf_first_link()
395 return rc == -EAGAIN ? SMC_CLC_DECL_TIMEOUT_CL : rc; in smcr_clnt_conf_first_link()
399 smc_llc_flow_qentry_del(&link->lgr->llc_flow_lcl); in smcr_clnt_conf_first_link()
409 if (smcr_link_reg_rmb(link, smc->conn.rmb_desc)) in smcr_clnt_conf_first_link()
413 smc->conn.rmb_desc->is_conf_rkey = true; in smcr_clnt_conf_first_link()
421 smcr_lgr_set_type(link->lgr, SMC_LGR_SINGLE); in smcr_clnt_conf_first_link()
424 qentry = smc_llc_wait(link->lgr, NULL, SMC_LLC_WAIT_TIME, in smcr_clnt_conf_first_link()
429 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_clnt_conf_first_link()
431 if (rc == -EAGAIN) in smcr_clnt_conf_first_link()
435 smc_llc_flow_qentry_clr(&link->lgr->llc_flow_lcl); in smcr_clnt_conf_first_link()
440 static void smcr_conn_save_peer_info(struct smc_sock *smc, in smcr_conn_save_peer_info() argument
443 int bufsize = smc_uncompress_bufsize(clc->r0.rmbe_size); in smcr_conn_save_peer_info()
445 smc->conn.peer_rmbe_idx = clc->r0.rmbe_idx; in smcr_conn_save_peer_info()
446 smc->conn.local_tx_ctrl.token = ntohl(clc->r0.rmbe_alert_token); in smcr_conn_save_peer_info()
447 smc->conn.peer_rmbe_size = bufsize; in smcr_conn_save_peer_info()
448 atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size); in smcr_conn_save_peer_info()
449 smc->conn.tx_off = bufsize * (smc->conn.peer_rmbe_idx - 1); in smcr_conn_save_peer_info()
462 static void smcd_conn_save_peer_info(struct smc_sock *smc, in smcd_conn_save_peer_info() argument
465 int bufsize = smc_uncompress_bufsize(clc->d0.dmbe_size); in smcd_conn_save_peer_info()
467 smc->conn.peer_rmbe_idx = clc->d0.dmbe_idx; in smcd_conn_save_peer_info()
468 smc->conn.peer_token = clc->d0.token; in smcd_conn_save_peer_info()
470 smc->conn.peer_rmbe_size = bufsize - sizeof(struct smcd_cdc_msg); in smcd_conn_save_peer_info()
471 atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size); in smcd_conn_save_peer_info()
472 smc->conn.tx_off = bufsize * smc->conn.peer_rmbe_idx; in smcd_conn_save_peer_info()
473 if (clc->hdr.version > SMC_V1 && in smcd_conn_save_peer_info()
474 (clc->hdr.typev2 & SMC_FIRST_CONTACT_MASK)) { in smcd_conn_save_peer_info()
481 memcpy(smc->conn.lgr->negotiated_eid, clc_v2->eid, in smcd_conn_save_peer_info()
483 smc->conn.lgr->peer_os = fce->os_type; in smcd_conn_save_peer_info()
484 smc->conn.lgr->peer_smc_release = fce->release; in smcd_conn_save_peer_info()
485 if (smc_isascii(fce->hostname)) in smcd_conn_save_peer_info()
486 memcpy(smc->conn.lgr->peer_hostname, fce->hostname, in smcd_conn_save_peer_info()
491 static void smc_conn_save_peer_info(struct smc_sock *smc, in smc_conn_save_peer_info() argument
494 if (smc->conn.lgr->is_smcd) in smc_conn_save_peer_info()
495 smcd_conn_save_peer_info(smc, clc); in smc_conn_save_peer_info()
497 smcr_conn_save_peer_info(smc, clc); in smc_conn_save_peer_info()
503 link->peer_qpn = ntoh24(clc->r0.qpn); in smc_link_save_peer_info()
504 memcpy(link->peer_gid, clc->r0.lcl.gid, SMC_GID_SIZE); in smc_link_save_peer_info()
505 memcpy(link->peer_mac, clc->r0.lcl.mac, sizeof(link->peer_mac)); in smc_link_save_peer_info()
506 link->peer_psn = ntoh24(clc->r0.psn); in smc_link_save_peer_info()
507 link->peer_mtu = clc->r0.qp_mtu; in smc_link_save_peer_info()
510 static void smc_switch_to_fallback(struct smc_sock *smc) in smc_switch_to_fallback() argument
512 smc->use_fallback = true; in smc_switch_to_fallback()
513 if (smc->sk.sk_socket && smc->sk.sk_socket->file) { in smc_switch_to_fallback()
514 smc->clcsock->file = smc->sk.sk_socket->file; in smc_switch_to_fallback()
515 smc->clcsock->file->private_data = smc->clcsock; in smc_switch_to_fallback()
516 smc->clcsock->wq.fasync_list = in smc_switch_to_fallback()
517 smc->sk.sk_socket->wq.fasync_list; in smc_switch_to_fallback()
522 static int smc_connect_fallback(struct smc_sock *smc, int reason_code) in smc_connect_fallback() argument
524 smc_switch_to_fallback(smc); in smc_connect_fallback()
525 smc->fallback_rsn = reason_code; in smc_connect_fallback()
526 smc_copy_sock_settings_to_clc(smc); in smc_connect_fallback()
527 smc->connect_nonblock = 0; in smc_connect_fallback()
528 if (smc->sk.sk_state == SMC_INIT) in smc_connect_fallback()
529 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_fallback()
534 static int smc_connect_decline_fallback(struct smc_sock *smc, int reason_code, in smc_connect_decline_fallback() argument
540 if (smc->sk.sk_state == SMC_INIT) in smc_connect_decline_fallback()
541 sock_put(&smc->sk); /* passive closing */ in smc_connect_decline_fallback()
545 rc = smc_clc_send_decline(smc, reason_code, version); in smc_connect_decline_fallback()
547 if (smc->sk.sk_state == SMC_INIT) in smc_connect_decline_fallback()
548 sock_put(&smc->sk); /* passive closing */ in smc_connect_decline_fallback()
552 return smc_connect_fallback(smc, reason_code); in smc_connect_decline_fallback()
556 static void smc_connect_abort(struct smc_sock *smc, int local_first) in smc_connect_abort() argument
559 smc_lgr_cleanup_early(&smc->conn); in smc_connect_abort()
561 smc_conn_free(&smc->conn); in smc_connect_abort()
566 static int smc_find_rdma_device(struct smc_sock *smc, struct smc_init_info *ini) in smc_find_rdma_device() argument
572 smc_pnet_find_roce_resource(smc->clcsock->sk, ini); in smc_find_rdma_device()
573 if (!ini->ib_dev) in smc_find_rdma_device()
580 static int smc_find_ism_device(struct smc_sock *smc, struct smc_init_info *ini) in smc_find_ism_device() argument
583 smc_pnet_find_ism_resource(smc->clcsock->sk, ini); in smc_find_ism_device()
584 if (!ini->ism_dev[0]) in smc_find_ism_device()
587 ini->ism_chid[0] = smc_ism_get_chid(ini->ism_dev[0]); in smc_find_ism_device()
595 int i = (!ini->ism_dev[0]) ? 1 : 0; in smc_find_ism_v2_is_unique_chid()
598 if (ini->ism_chid[i] == chid) in smc_find_ism_v2_is_unique_chid()
606 static int smc_find_ism_v2_device_clnt(struct smc_sock *smc, in smc_find_ism_v2_device_clnt() argument
614 if (smcd_indicated(ini->smc_type_v1)) in smc_find_ism_v2_device_clnt()
618 if (smcd->going_away || smcd == ini->ism_dev[0]) in smc_find_ism_v2_device_clnt()
623 if (!smc_pnet_is_pnetid_set(smcd->pnetid) || in smc_find_ism_v2_device_clnt()
624 smc_pnet_is_ndev_pnetid(sock_net(&smc->sk), smcd->pnetid)) { in smc_find_ism_v2_device_clnt()
625 ini->ism_dev[i] = smcd; in smc_find_ism_v2_device_clnt()
626 ini->ism_chid[i] = chid; in smc_find_ism_v2_device_clnt()
627 ini->is_smcd = true; in smc_find_ism_v2_device_clnt()
635 ini->ism_offered_cnt = i - 1; in smc_find_ism_v2_device_clnt()
636 if (!ini->ism_dev[0] && !ini->ism_dev[1]) in smc_find_ism_v2_device_clnt()
637 ini->smcd_version = 0; in smc_find_ism_v2_device_clnt()
642 /* Check for VLAN ID and register it on ISM device just for CLC handshake */
643 static int smc_connect_ism_vlan_setup(struct smc_sock *smc, in smc_connect_ism_vlan_setup() argument
646 if (ini->vlan_id && smc_ism_get_vlan(ini->ism_dev[0], ini->vlan_id)) in smc_connect_ism_vlan_setup()
651 static int smc_find_proposal_devices(struct smc_sock *smc, in smc_find_proposal_devices() argument
657 if (ini->smcd_version & SMC_V1) { in smc_find_proposal_devices()
658 if (smc_find_ism_device(smc, ini) || in smc_find_proposal_devices()
659 smc_connect_ism_vlan_setup(smc, ini)) { in smc_find_proposal_devices()
660 if (ini->smc_type_v1 == SMC_TYPE_B) in smc_find_proposal_devices()
661 ini->smc_type_v1 = SMC_TYPE_R; in smc_find_proposal_devices()
663 ini->smc_type_v1 = SMC_TYPE_N; in smc_find_proposal_devices()
665 if (smc_find_rdma_device(smc, ini)) { in smc_find_proposal_devices()
666 if (ini->smc_type_v1 == SMC_TYPE_B) in smc_find_proposal_devices()
667 ini->smc_type_v1 = SMC_TYPE_D; in smc_find_proposal_devices()
669 ini->smc_type_v1 = SMC_TYPE_N; in smc_find_proposal_devices()
672 if (smc_ism_v2_capable && smc_find_ism_v2_device_clnt(smc, ini)) in smc_find_proposal_devices()
673 ini->smc_type_v2 = SMC_TYPE_N; in smc_find_proposal_devices()
676 if (!smcr_indicated(ini->smc_type_v1) && in smc_find_proposal_devices()
677 ini->smc_type_v1 == SMC_TYPE_N && ini->smc_type_v2 == SMC_TYPE_N) in smc_find_proposal_devices()
683 /* cleanup temporary VLAN ID registration used for CLC handshake. If ISM is
684 * used, the VLAN ID will be registered again during the connection setup.
686 static int smc_connect_ism_vlan_cleanup(struct smc_sock *smc, in smc_connect_ism_vlan_cleanup() argument
689 if (!smcd_indicated(ini->smc_type_v1)) in smc_connect_ism_vlan_cleanup()
691 if (ini->vlan_id && smc_ism_put_vlan(ini->ism_dev[0], ini->vlan_id)) in smc_connect_ism_vlan_cleanup()
702 static int smc_connect_clc(struct smc_sock *smc, in smc_connect_clc() argument
709 rc = smc_clc_send_proposal(smc, ini); in smc_connect_clc()
712 /* receive SMC Accept CLC message */ in smc_connect_clc()
713 return smc_clc_wait_msg(smc, aclc2, SMC_CLC_MAX_ACCEPT_LEN, in smc_connect_clc()
718 static int smc_connect_rdma(struct smc_sock *smc, in smc_connect_rdma() argument
725 ini->is_smcd = false; in smc_connect_rdma()
726 ini->ib_lcl = &aclc->r0.lcl; in smc_connect_rdma()
727 ini->ib_clcqpn = ntoh24(aclc->r0.qpn); in smc_connect_rdma()
728 ini->first_contact_peer = aclc->hdr.typev2 & SMC_FIRST_CONTACT_MASK; in smc_connect_rdma()
731 reason_code = smc_conn_create(smc, ini); in smc_connect_rdma()
737 smc_conn_save_peer_info(smc, aclc); in smc_connect_rdma()
739 if (ini->first_contact_local) { in smc_connect_rdma()
740 link = smc->conn.lnk; in smc_connect_rdma()
745 struct smc_link *l = &smc->conn.lgr->lnk[i]; in smc_connect_rdma()
747 if (l->peer_qpn == ntoh24(aclc->r0.qpn) && in smc_connect_rdma()
748 !memcmp(l->peer_gid, &aclc->r0.lcl.gid, in smc_connect_rdma()
750 !memcmp(l->peer_mac, &aclc->r0.lcl.mac, in smc_connect_rdma()
751 sizeof(l->peer_mac))) { in smc_connect_rdma()
760 smc->conn.lnk = link; in smc_connect_rdma()
764 if (smc_buf_create(smc, false)) { in smc_connect_rdma()
769 if (ini->first_contact_local) in smc_connect_rdma()
772 if (smc_rmb_rtoken_handling(&smc->conn, link, aclc)) { in smc_connect_rdma()
777 smc_close_init(smc); in smc_connect_rdma()
778 smc_rx_init(smc); in smc_connect_rdma()
780 if (ini->first_contact_local) { in smc_connect_rdma()
786 if (smcr_lgr_reg_rmbs(link, smc->conn.rmb_desc)) { in smc_connect_rdma()
791 smc_rmb_sync_sg_for_device(&smc->conn); in smc_connect_rdma()
793 reason_code = smc_clc_send_confirm(smc, ini->first_contact_local, in smc_connect_rdma()
798 smc_tx_init(smc); in smc_connect_rdma()
800 if (ini->first_contact_local) { in smc_connect_rdma()
802 smc_llc_flow_initiate(link->lgr, SMC_LLC_FLOW_ADD_LINK); in smc_connect_rdma()
803 reason_code = smcr_clnt_conf_first_link(smc); in smc_connect_rdma()
804 smc_llc_flow_stop(link->lgr, &link->lgr->llc_flow_lcl); in smc_connect_rdma()
810 smc_copy_sock_settings_to_clc(smc); in smc_connect_rdma()
811 smc->connect_nonblock = 0; in smc_connect_rdma()
812 if (smc->sk.sk_state == SMC_INIT) in smc_connect_rdma()
813 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_rdma()
817 smc_connect_abort(smc, ini->first_contact_local); in smc_connect_rdma()
819 smc->connect_nonblock = 0; in smc_connect_rdma()
833 for (i = 0; i < ini->ism_offered_cnt + 1; i++) { in smc_v2_determine_accepted_chid()
834 if (ini->ism_chid[i] == ntohs(aclc->chid)) { in smc_v2_determine_accepted_chid()
835 ini->ism_selected = i; in smc_v2_determine_accepted_chid()
840 return -EPROTO; in smc_v2_determine_accepted_chid()
844 static int smc_connect_ism(struct smc_sock *smc, in smc_connect_ism() argument
850 ini->is_smcd = true; in smc_connect_ism()
851 ini->first_contact_peer = aclc->hdr.typev2 & SMC_FIRST_CONTACT_MASK; in smc_connect_ism()
853 if (aclc->hdr.version == SMC_V2) { in smc_connect_ism()
861 ini->ism_peer_gid[ini->ism_selected] = aclc->d0.gid; in smc_connect_ism()
863 /* there is only one lgr role for SMC-D; use server lock */ in smc_connect_ism()
865 rc = smc_conn_create(smc, ini); in smc_connect_ism()
872 rc = smc_buf_create(smc, true); in smc_connect_ism()
874 rc = (rc == -ENOSPC) ? SMC_CLC_DECL_MAX_DMB : SMC_CLC_DECL_MEM; in smc_connect_ism()
878 smc_conn_save_peer_info(smc, aclc); in smc_connect_ism()
879 smc_close_init(smc); in smc_connect_ism()
880 smc_rx_init(smc); in smc_connect_ism()
881 smc_tx_init(smc); in smc_connect_ism()
883 rc = smc_clc_send_confirm(smc, ini->first_contact_local, in smc_connect_ism()
884 aclc->hdr.version); in smc_connect_ism()
889 smc_copy_sock_settings_to_clc(smc); in smc_connect_ism()
890 smc->connect_nonblock = 0; in smc_connect_ism()
891 if (smc->sk.sk_state == SMC_INIT) in smc_connect_ism()
892 smc->sk.sk_state = SMC_ACTIVE; in smc_connect_ism()
896 smc_connect_abort(smc, ini->first_contact_local); in smc_connect_ism()
898 smc->connect_nonblock = 0; in smc_connect_ism()
907 if ((aclc->hdr.typev1 == SMC_TYPE_R && in smc_connect_check_aclc()
908 !smcr_indicated(ini->smc_type_v1)) || in smc_connect_check_aclc()
909 (aclc->hdr.typev1 == SMC_TYPE_D && in smc_connect_check_aclc()
910 ((!smcd_indicated(ini->smc_type_v1) && in smc_connect_check_aclc()
911 !smcd_indicated(ini->smc_type_v2)) || in smc_connect_check_aclc()
912 (aclc->hdr.version == SMC_V1 && in smc_connect_check_aclc()
913 !smcd_indicated(ini->smc_type_v1)) || in smc_connect_check_aclc()
914 (aclc->hdr.version == SMC_V2 && in smc_connect_check_aclc()
915 !smcd_indicated(ini->smc_type_v2))))) in smc_connect_check_aclc()
922 static int __smc_connect(struct smc_sock *smc) in __smc_connect() argument
931 if (smc->use_fallback) in __smc_connect()
932 return smc_connect_fallback(smc, smc->fallback_rsn); in __smc_connect()
934 /* if peer has not signalled SMC-capability, fall back */ in __smc_connect()
935 if (!tcp_sk(smc->clcsock->sk)->syn_smc) in __smc_connect()
936 return smc_connect_fallback(smc, SMC_CLC_DECL_PEERNOSMC); in __smc_connect()
938 /* IPSec connections opt out of SMC optimizations */ in __smc_connect()
939 if (using_ipsec(smc)) in __smc_connect()
940 return smc_connect_decline_fallback(smc, SMC_CLC_DECL_IPSEC, in __smc_connect()
945 return smc_connect_decline_fallback(smc, SMC_CLC_DECL_MEM, in __smc_connect()
948 ini->smcd_version = SMC_V1; in __smc_connect()
949 ini->smcd_version |= smc_ism_v2_capable ? SMC_V2 : 0; in __smc_connect()
950 ini->smc_type_v1 = SMC_TYPE_B; in __smc_connect()
951 ini->smc_type_v2 = smc_ism_v2_capable ? SMC_TYPE_D : SMC_TYPE_N; in __smc_connect()
953 /* get vlan id from IP device */ in __smc_connect()
954 if (smc_vlan_by_tcpsk(smc->clcsock, ini)) { in __smc_connect()
955 ini->smcd_version &= ~SMC_V1; in __smc_connect()
956 ini->smc_type_v1 = SMC_TYPE_N; in __smc_connect()
957 if (!ini->smcd_version) { in __smc_connect()
963 rc = smc_find_proposal_devices(smc, ini); in __smc_connect()
976 rc = smc_connect_clc(smc, aclc2, ini); in __smc_connect()
980 /* check if smc modes and versions of CLC proposal and accept match */ in __smc_connect()
982 version = aclc->hdr.version == SMC_V1 ? SMC_V1 : SMC_V2; in __smc_connect()
983 ini->smcd_version = version; in __smc_connect()
988 if (aclc->hdr.typev1 == SMC_TYPE_R) in __smc_connect()
989 rc = smc_connect_rdma(smc, aclc, ini); in __smc_connect()
990 else if (aclc->hdr.typev1 == SMC_TYPE_D) in __smc_connect()
991 rc = smc_connect_ism(smc, aclc, ini); in __smc_connect()
995 smc_connect_ism_vlan_cleanup(smc, ini); in __smc_connect()
1001 smc_connect_ism_vlan_cleanup(smc, ini); in __smc_connect()
1005 return smc_connect_decline_fallback(smc, rc, version); in __smc_connect()
1010 struct smc_sock *smc = container_of(work, struct smc_sock, in smc_connect_work() local
1012 long timeo = smc->sk.sk_sndtimeo; in smc_connect_work()
1017 lock_sock(smc->clcsock->sk); in smc_connect_work()
1018 if (smc->clcsock->sk->sk_err) { in smc_connect_work()
1019 smc->sk.sk_err = smc->clcsock->sk->sk_err; in smc_connect_work()
1020 } else if ((1 << smc->clcsock->sk->sk_state) & in smc_connect_work()
1022 rc = sk_stream_wait_connect(smc->clcsock->sk, &timeo); in smc_connect_work()
1023 if ((rc == -EPIPE) && in smc_connect_work()
1024 ((1 << smc->clcsock->sk->sk_state) & in smc_connect_work()
1028 release_sock(smc->clcsock->sk); in smc_connect_work()
1029 lock_sock(&smc->sk); in smc_connect_work()
1030 if (rc != 0 || smc->sk.sk_err) { in smc_connect_work()
1031 smc->sk.sk_state = SMC_CLOSED; in smc_connect_work()
1032 if (rc == -EPIPE || rc == -EAGAIN) in smc_connect_work()
1033 smc->sk.sk_err = EPIPE; in smc_connect_work()
1035 smc->sk.sk_err = -sock_intr_errno(timeo); in smc_connect_work()
1036 sock_put(&smc->sk); /* passive closing */ in smc_connect_work()
1040 rc = __smc_connect(smc); in smc_connect_work()
1042 smc->sk.sk_err = -rc; in smc_connect_work()
1045 if (!sock_flag(&smc->sk, SOCK_DEAD)) { in smc_connect_work()
1046 if (smc->sk.sk_err) { in smc_connect_work()
1047 smc->sk.sk_state_change(&smc->sk); in smc_connect_work()
1049 smc->clcsock->sk->sk_write_space(smc->clcsock->sk); in smc_connect_work()
1050 smc->sk.sk_write_space(&smc->sk); in smc_connect_work()
1053 release_sock(&smc->sk); in smc_connect_work()
1059 struct sock *sk = sock->sk; in smc_connect()
1060 struct smc_sock *smc; in smc_connect() local
1061 int rc = -EINVAL; in smc_connect()
1063 smc = smc_sk(sk); in smc_connect()
1065 /* separate smc parameter checking to be safe */ in smc_connect()
1066 if (alen < sizeof(addr->sa_family)) in smc_connect()
1068 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6) in smc_connect()
1072 switch (sk->sk_state) { in smc_connect()
1076 rc = -EISCONN; in smc_connect()
1083 smc_copy_sock_settings_to_clc(smc); in smc_connect()
1084 tcp_sk(smc->clcsock->sk)->syn_smc = 1; in smc_connect()
1085 if (smc->connect_nonblock) { in smc_connect()
1086 rc = -EALREADY; in smc_connect()
1089 rc = kernel_connect(smc->clcsock, addr, alen, flags); in smc_connect()
1090 if (rc && rc != -EINPROGRESS) in smc_connect()
1093 sock_hold(&smc->sk); /* sock put in passive closing */ in smc_connect()
1094 if (smc->use_fallback) in smc_connect()
1097 if (queue_work(smc_hs_wq, &smc->connect_work)) in smc_connect()
1098 smc->connect_nonblock = 1; in smc_connect()
1099 rc = -EINPROGRESS; in smc_connect()
1101 rc = __smc_connect(smc); in smc_connect()
1117 struct sock *lsk = &lsmc->sk; in smc_clcsock_accept()
1119 int rc = -EINVAL; in smc_clcsock_accept()
1122 new_sk = smc_sock_alloc(sock_net(lsk), NULL, lsk->sk_protocol); in smc_clcsock_accept()
1124 rc = -ENOMEM; in smc_clcsock_accept()
1125 lsk->sk_err = ENOMEM; in smc_clcsock_accept()
1132 mutex_lock(&lsmc->clcsock_release_lock); in smc_clcsock_accept()
1133 if (lsmc->clcsock) in smc_clcsock_accept()
1134 rc = kernel_accept(lsmc->clcsock, &new_clcsock, SOCK_NONBLOCK); in smc_clcsock_accept()
1135 mutex_unlock(&lsmc->clcsock_release_lock); in smc_clcsock_accept()
1137 if (rc < 0 && rc != -EAGAIN) in smc_clcsock_accept()
1138 lsk->sk_err = -rc; in smc_clcsock_accept()
1139 if (rc < 0 || lsk->sk_state == SMC_CLOSED) { in smc_clcsock_accept()
1140 new_sk->sk_prot->unhash(new_sk); in smc_clcsock_accept()
1143 new_sk->sk_state = SMC_CLOSED; in smc_clcsock_accept()
1150 /* new clcsock has inherited the smc listen-specific sk_data_ready in smc_clcsock_accept()
1153 new_clcsock->sk->sk_data_ready = lsmc->clcsk_data_ready; in smc_clcsock_accept()
1154 (*new_smc)->clcsock = new_clcsock; in smc_clcsock_accept()
1167 spin_lock(&par->accept_q_lock); in smc_accept_enqueue()
1168 list_add_tail(&smc_sk(sk)->accept_q, &par->accept_q); in smc_accept_enqueue()
1169 spin_unlock(&par->accept_q_lock); in smc_accept_enqueue()
1176 struct smc_sock *par = smc_sk(sk)->listen_smc; in smc_accept_unlink()
1178 spin_lock(&par->accept_q_lock); in smc_accept_unlink()
1179 list_del_init(&smc_sk(sk)->accept_q); in smc_accept_unlink()
1180 spin_unlock(&par->accept_q_lock); in smc_accept_unlink()
1181 sk_acceptq_removed(&smc_sk(sk)->listen_smc->sk); in smc_accept_unlink()
1194 list_for_each_entry_safe(isk, n, &smc_sk(parent)->accept_q, accept_q) { in smc_accept_dequeue()
1198 if (new_sk->sk_state == SMC_CLOSED) { in smc_accept_dequeue()
1199 new_sk->sk_prot->unhash(new_sk); in smc_accept_dequeue()
1200 if (isk->clcsock) { in smc_accept_dequeue()
1201 sock_release(isk->clcsock); in smc_accept_dequeue()
1202 isk->clcsock = NULL; in smc_accept_dequeue()
1209 if (isk->use_fallback) { in smc_accept_dequeue()
1210 smc_sk(new_sk)->clcsock->file = new_sock->file; in smc_accept_dequeue()
1211 isk->clcsock->file->private_data = isk->clcsock; in smc_accept_dequeue()
1222 struct smc_sock *smc = smc_sk(sk); in smc_close_non_accepted() local
1226 if (!sk->sk_lingertime) in smc_close_non_accepted()
1228 sk->sk_lingertime = SMC_MAX_STREAM_WAIT_TIMEOUT; in smc_close_non_accepted()
1229 __smc_release(smc); in smc_close_non_accepted()
1235 static int smcr_serv_conf_first_link(struct smc_sock *smc) in smcr_serv_conf_first_link() argument
1237 struct smc_link *link = smc->conn.lnk; in smcr_serv_conf_first_link()
1241 if (smcr_link_reg_rmb(link, smc->conn.rmb_desc)) in smcr_serv_conf_first_link()
1250 qentry = smc_llc_wait(link->lgr, link, SMC_LLC_WAIT_TIME, in smcr_serv_conf_first_link()
1255 rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc), in smcr_serv_conf_first_link()
1257 return rc == -EAGAIN ? SMC_CLC_DECL_TIMEOUT_CL : rc; in smcr_serv_conf_first_link()
1261 smc_llc_flow_qentry_del(&link->lgr->llc_flow_lcl); in smcr_serv_conf_first_link()
1266 smc->conn.rmb_desc->is_conf_rkey = true; in smcr_serv_conf_first_link()
1269 smcr_lgr_set_type(link->lgr, SMC_LGR_SINGLE); in smcr_serv_conf_first_link()
1271 /* initial contact - try to establish second link */ in smcr_serv_conf_first_link()
1279 struct smc_sock *lsmc = new_smc->listen_smc; in smc_listen_out()
1280 struct sock *newsmcsk = &new_smc->sk; in smc_listen_out()
1282 if (lsmc->sk.sk_state == SMC_LISTEN) { in smc_listen_out()
1283 lock_sock_nested(&lsmc->sk, SINGLE_DEPTH_NESTING); in smc_listen_out()
1284 smc_accept_enqueue(&lsmc->sk, newsmcsk); in smc_listen_out()
1285 release_sock(&lsmc->sk); in smc_listen_out()
1291 lsmc->sk.sk_data_ready(&lsmc->sk); in smc_listen_out()
1292 sock_put(&lsmc->sk); /* sock_hold in smc_tcp_listen_work */ in smc_listen_out()
1298 struct sock *newsmcsk = &new_smc->sk; in smc_listen_out_connected()
1301 if (newsmcsk->sk_state == SMC_INIT) in smc_listen_out_connected()
1302 newsmcsk->sk_state = SMC_ACTIVE; in smc_listen_out_connected()
1310 struct sock *newsmcsk = &new_smc->sk; in smc_listen_out_err()
1312 if (newsmcsk->sk_state == SMC_INIT) in smc_listen_out_err()
1313 sock_put(&new_smc->sk); /* passive closing */ in smc_listen_out_err()
1314 newsmcsk->sk_state = SMC_CLOSED; in smc_listen_out_err()
1325 smc_lgr_cleanup_early(&new_smc->conn); in smc_listen_decline()
1327 smc_conn_free(&new_smc->conn); in smc_listen_decline()
1333 new_smc->fallback_rsn = reason_code; in smc_listen_decline()
1351 ini->smc_type_v1 = pclc->hdr.typev1; in smc_listen_v2_check()
1352 ini->smc_type_v2 = pclc->hdr.typev2; in smc_listen_v2_check()
1353 ini->smcd_version = ini->smc_type_v1 != SMC_TYPE_N ? SMC_V1 : 0; in smc_listen_v2_check()
1354 if (pclc->hdr.version > SMC_V1) in smc_listen_v2_check()
1355 ini->smcd_version |= in smc_listen_v2_check()
1356 ini->smc_type_v2 != SMC_TYPE_N ? SMC_V2 : 0; in smc_listen_v2_check()
1358 ini->smcd_version &= ~SMC_V2; in smc_listen_v2_check()
1363 ini->smcd_version &= ~SMC_V2; in smc_listen_v2_check()
1368 ini->smcd_version &= ~SMC_V2; in smc_listen_v2_check()
1371 if (!ini->smcd_version) { in smc_listen_v2_check()
1372 if (pclc->hdr.typev1 == SMC_TYPE_B || in smc_listen_v2_check()
1373 pclc->hdr.typev2 == SMC_TYPE_B) in smc_listen_v2_check()
1375 if (pclc->hdr.typev1 == SMC_TYPE_D || in smc_listen_v2_check()
1376 pclc->hdr.typev2 == SMC_TYPE_D) in smc_listen_v2_check()
1389 struct socket *newclcsock = new_smc->clcsock; in smc_listen_prfx_check()
1391 if (pclc->hdr.typev1 == SMC_TYPE_N) in smc_listen_prfx_check()
1418 /* listen worker: initialize connection and buffers for SMC-D */
1431 if (ini->first_contact_local) in smc_listen_ism_init()
1432 smc_lgr_cleanup_early(&new_smc->conn); in smc_listen_ism_init()
1434 smc_conn_free(&new_smc->conn); in smc_listen_ism_init()
1435 return (rc == -ENOSPC) ? SMC_CLC_DECL_MAX_DMB : in smc_listen_ism_init()
1449 if (smcd == ini->ism_dev[i]) in smc_is_already_selected()
1463 if (smcd->going_away) in smc_check_ism_v2_match()
1469 ini->ism_peer_gid[*matches] = proposed_gid; in smc_check_ism_v2_match()
1470 ini->ism_dev[*matches] = smcd; in smc_check_ism_v2_match()
1489 if (!(ini->smcd_version & SMC_V2) || !smcd_indicated(ini->smc_type_v2)) in smc_find_ism_v2_device_serv()
1496 !smc_v2_ext->hdr.flag.seid) /* no system EID support for SMCD */ in smc_find_ism_v2_device_serv()
1500 if (pclc_smcd->ism.chid) in smc_find_ism_v2_device_serv()
1502 smc_check_ism_v2_match(ini, ntohs(pclc_smcd->ism.chid), in smc_find_ism_v2_device_serv()
1503 ntohll(pclc_smcd->ism.gid), &matches); in smc_find_ism_v2_device_serv()
1504 for (i = 1; i <= smc_v2_ext->hdr.ism_gid_cnt; i++) { in smc_find_ism_v2_device_serv()
1505 /* check for ISM devices matching proposed non-native ISM in smc_find_ism_v2_device_serv()
1509 ntohs(smcd_v2_ext->gidchid[i - 1].chid), in smc_find_ism_v2_device_serv()
1510 ntohll(smcd_v2_ext->gidchid[i - 1].gid), in smc_find_ism_v2_device_serv()
1515 if (ini->ism_dev[0]) { in smc_find_ism_v2_device_serv()
1516 smc_ism_get_system_eid(ini->ism_dev[0], &eid); in smc_find_ism_v2_device_serv()
1517 if (memcmp(eid, smcd_v2_ext->system_eid, SMC_MAX_EID_LEN)) in smc_find_ism_v2_device_serv()
1523 /* separate - outside the smcd_dev_list.lock */ in smc_find_ism_v2_device_serv()
1524 smcd_version = ini->smcd_version; in smc_find_ism_v2_device_serv()
1526 ini->smcd_version = SMC_V2; in smc_find_ism_v2_device_serv()
1527 ini->is_smcd = true; in smc_find_ism_v2_device_serv()
1528 ini->ism_selected = i; in smc_find_ism_v2_device_serv()
1535 ini->smcd_version = smcd_version; /* restore original value */ in smc_find_ism_v2_device_serv()
1538 ini->smcd_version &= ~SMC_V2; in smc_find_ism_v2_device_serv()
1539 ini->ism_dev[0] = NULL; in smc_find_ism_v2_device_serv()
1540 ini->is_smcd = false; in smc_find_ism_v2_device_serv()
1550 if (!(ini->smcd_version & SMC_V1) || !smcd_indicated(ini->smc_type_v1)) in smc_find_ism_v1_device_serv()
1552 ini->is_smcd = true; /* prepare ISM check */ in smc_find_ism_v1_device_serv()
1553 ini->ism_peer_gid[0] = ntohll(pclc_smcd->ism.gid); in smc_find_ism_v1_device_serv()
1556 ini->ism_selected = 0; in smc_find_ism_v1_device_serv()
1561 ini->ism_dev[0] = NULL; in smc_find_ism_v1_device_serv()
1562 ini->is_smcd = false; in smc_find_ism_v1_device_serv()
1568 struct smc_connection *conn = &new_smc->conn; in smc_listen_rdma_reg()
1571 if (smcr_lgr_reg_rmbs(conn->lnk, conn->rmb_desc)) in smc_listen_rdma_reg()
1574 smc_rmb_sync_sg_for_device(&new_smc->conn); in smc_listen_rdma_reg()
1585 if (!smcr_indicated(ini->smc_type_v1)) in smc_find_rdma_v1_device_serv()
1589 ini->ib_lcl = &pclc->lcl; in smc_find_rdma_v1_device_serv()
1593 if (ini->smc_type_v1 == SMC_TYPE_B) in smc_find_rdma_v1_device_serv()
1601 return smc_listen_rdma_reg(new_smc, ini->first_contact_local); in smc_find_rdma_v1_device_serv()
1613 if (ini->ism_dev[0]) in smc_listen_find_device()
1616 if (!(ini->smcd_version & SMC_V1)) in smc_listen_find_device()
1624 /* get vlan id from IP device */ in smc_listen_find_device()
1625 if (smc_vlan_by_tcpsk(new_smc->clcsock, ini)) in smc_listen_find_device()
1630 if (ini->ism_dev[0]) in smc_listen_find_device()
1633 if (pclc->hdr.typev1 == SMC_TYPE_D) in smc_listen_find_device()
1645 struct smc_link *link = new_smc->conn.lnk; in smc_listen_rdma_finish()
1651 if (smc_rmb_rtoken_handling(&new_smc->conn, link, cclc)) in smc_listen_rdma_finish()
1658 smc_llc_flow_initiate(link->lgr, SMC_LLC_FLOW_ADD_LINK); in smc_listen_rdma_finish()
1660 smc_llc_flow_stop(link->lgr, &link->lgr->llc_flow_lcl); in smc_listen_rdma_finish()
1671 struct socket *newclcsock = new_smc->clcsock; in smc_listen_work()
1678 if (new_smc->listen_smc->sk.sk_state != SMC_LISTEN) in smc_listen_work()
1681 if (new_smc->use_fallback) { in smc_listen_work()
1686 /* check if peer is smc capable */ in smc_listen_work()
1687 if (!tcp_sk(newclcsock->sk)->syn_smc) { in smc_listen_work()
1689 new_smc->fallback_rsn = SMC_CLC_DECL_PEERNOSMC; in smc_listen_work()
1694 /* do inband token exchange - in smc_listen_work()
1695 * wait for and receive SMC Proposal CLC message in smc_listen_work()
1707 version = pclc->hdr.version == SMC_V1 ? SMC_V1 : version; in smc_listen_work()
1709 /* IPSec connections opt out of SMC optimizations */ in smc_listen_work()
1736 /* send SMC Accept CLC message */ in smc_listen_work()
1737 rc = smc_clc_send_accept(new_smc, ini->first_contact_local, in smc_listen_work()
1738 ini->smcd_version == SMC_V2 ? SMC_V2 : SMC_V1); in smc_listen_work()
1742 /* SMC-D does not need this lock any more */ in smc_listen_work()
1743 if (ini->is_smcd) in smc_listen_work()
1746 /* receive SMC Confirm CLC message */ in smc_listen_work()
1752 if (!ini->is_smcd) in smc_listen_work()
1758 if (!ini->is_smcd) { in smc_listen_work()
1760 ini->first_contact_local); in smc_listen_work()
1772 smc_listen_decline(new_smc, rc, ini ? ini->first_contact_local : 0, in smc_listen_work()
1783 struct sock *lsk = &lsmc->sk; in smc_tcp_listen_work()
1788 while (lsk->sk_state == SMC_LISTEN) { in smc_tcp_listen_work()
1795 new_smc->listen_smc = lsmc; in smc_tcp_listen_work()
1796 new_smc->use_fallback = lsmc->use_fallback; in smc_tcp_listen_work()
1797 new_smc->fallback_rsn = lsmc->fallback_rsn; in smc_tcp_listen_work()
1799 INIT_WORK(&new_smc->smc_listen_work, smc_listen_work); in smc_tcp_listen_work()
1801 new_smc->sk.sk_sndbuf = lsmc->sk.sk_sndbuf; in smc_tcp_listen_work()
1802 new_smc->sk.sk_rcvbuf = lsmc->sk.sk_rcvbuf; in smc_tcp_listen_work()
1803 sock_hold(&new_smc->sk); /* sock_put in passive closing */ in smc_tcp_listen_work()
1804 if (!queue_work(smc_hs_wq, &new_smc->smc_listen_work)) in smc_tcp_listen_work()
1805 sock_put(&new_smc->sk); in smc_tcp_listen_work()
1810 sock_put(&lsmc->sk); /* sock_hold in smc_clcsock_data_ready() */ in smc_tcp_listen_work()
1818 ((uintptr_t)listen_clcsock->sk_user_data & ~SK_USER_DATA_NOCOPY); in smc_clcsock_data_ready()
1821 lsmc->clcsk_data_ready(listen_clcsock); in smc_clcsock_data_ready()
1822 if (lsmc->sk.sk_state == SMC_LISTEN) { in smc_clcsock_data_ready()
1823 sock_hold(&lsmc->sk); /* sock_put in smc_tcp_listen_work() */ in smc_clcsock_data_ready()
1824 if (!queue_work(smc_hs_wq, &lsmc->tcp_listen_work)) in smc_clcsock_data_ready()
1825 sock_put(&lsmc->sk); in smc_clcsock_data_ready()
1831 struct sock *sk = sock->sk; in smc_listen()
1832 struct smc_sock *smc; in smc_listen() local
1835 smc = smc_sk(sk); in smc_listen()
1838 rc = -EINVAL; in smc_listen()
1839 if ((sk->sk_state != SMC_INIT && sk->sk_state != SMC_LISTEN) || in smc_listen()
1840 smc->connect_nonblock) in smc_listen()
1844 if (sk->sk_state == SMC_LISTEN) { in smc_listen()
1845 sk->sk_max_ack_backlog = backlog; in smc_listen()
1849 * them to the clc socket -- copy smc socket options to clc socket in smc_listen()
1851 smc_copy_sock_settings_to_clc(smc); in smc_listen()
1852 if (!smc->use_fallback) in smc_listen()
1853 tcp_sk(smc->clcsock->sk)->syn_smc = 1; in smc_listen()
1856 * smc-specific sk_data_ready function in smc_listen()
1858 smc->clcsk_data_ready = smc->clcsock->sk->sk_data_ready; in smc_listen()
1859 smc->clcsock->sk->sk_data_ready = smc_clcsock_data_ready; in smc_listen()
1860 smc->clcsock->sk->sk_user_data = in smc_listen()
1861 (void *)((uintptr_t)smc | SK_USER_DATA_NOCOPY); in smc_listen()
1862 rc = kernel_listen(smc->clcsock, backlog); in smc_listen()
1865 sk->sk_max_ack_backlog = backlog; in smc_listen()
1866 sk->sk_ack_backlog = 0; in smc_listen()
1867 sk->sk_state = SMC_LISTEN; in smc_listen()
1877 struct sock *sk = sock->sk, *nsk; in smc_accept()
1887 if (lsmc->sk.sk_state != SMC_LISTEN) { in smc_accept()
1888 rc = -EINVAL; in smc_accept()
1899 rc = -EAGAIN; in smc_accept()
1921 if (lsmc->sockopt_defer_accept && !(flags & O_NONBLOCK)) { in smc_accept()
1923 timeo = msecs_to_jiffies(lsmc->sockopt_defer_accept * in smc_accept()
1925 if (smc_sk(nsk)->use_fallback) { in smc_accept()
1926 struct sock *clcsk = smc_sk(nsk)->clcsock->sk; in smc_accept()
1929 if (skb_queue_empty(&clcsk->sk_receive_queue)) in smc_accept()
1932 } else if (!atomic_read(&smc_sk(nsk)->conn.bytes_to_rcv)) { in smc_accept()
1947 struct smc_sock *smc; in smc_getname() local
1949 if (peer && (sock->sk->sk_state != SMC_ACTIVE) && in smc_getname()
1950 (sock->sk->sk_state != SMC_APPCLOSEWAIT1)) in smc_getname()
1951 return -ENOTCONN; in smc_getname()
1953 smc = smc_sk(sock->sk); in smc_getname()
1955 return smc->clcsock->ops->getname(smc->clcsock, addr, peer); in smc_getname()
1960 struct sock *sk = sock->sk; in smc_sendmsg()
1961 struct smc_sock *smc; in smc_sendmsg() local
1962 int rc = -EPIPE; in smc_sendmsg()
1964 smc = smc_sk(sk); in smc_sendmsg()
1966 if ((sk->sk_state != SMC_ACTIVE) && in smc_sendmsg()
1967 (sk->sk_state != SMC_APPCLOSEWAIT1) && in smc_sendmsg()
1968 (sk->sk_state != SMC_INIT)) in smc_sendmsg()
1971 if (msg->msg_flags & MSG_FASTOPEN) { in smc_sendmsg()
1972 if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) { in smc_sendmsg()
1973 smc_switch_to_fallback(smc); in smc_sendmsg()
1974 smc->fallback_rsn = SMC_CLC_DECL_OPTUNSUPP; in smc_sendmsg()
1976 rc = -EINVAL; in smc_sendmsg()
1981 if (smc->use_fallback) in smc_sendmsg()
1982 rc = smc->clcsock->ops->sendmsg(smc->clcsock, msg, len); in smc_sendmsg()
1984 rc = smc_tx_sendmsg(smc, msg, len); in smc_sendmsg()
1993 struct sock *sk = sock->sk; in smc_recvmsg()
1994 struct smc_sock *smc; in smc_recvmsg() local
1995 int rc = -ENOTCONN; in smc_recvmsg()
1997 smc = smc_sk(sk); in smc_recvmsg()
1999 if (sk->sk_state == SMC_CLOSED && (sk->sk_shutdown & RCV_SHUTDOWN)) { in smc_recvmsg()
2004 if ((sk->sk_state == SMC_INIT) || in smc_recvmsg()
2005 (sk->sk_state == SMC_LISTEN) || in smc_recvmsg()
2006 (sk->sk_state == SMC_CLOSED)) in smc_recvmsg()
2009 if (sk->sk_state == SMC_PEERFINCLOSEWAIT) { in smc_recvmsg()
2014 if (smc->use_fallback) { in smc_recvmsg()
2015 rc = smc->clcsock->ops->recvmsg(smc->clcsock, msg, len, flags); in smc_recvmsg()
2017 msg->msg_namelen = 0; in smc_recvmsg()
2018 rc = smc_rx_recvmsg(smc, msg, NULL, len, flags); in smc_recvmsg()
2031 spin_lock(&isk->accept_q_lock); in smc_accept_poll()
2032 if (!list_empty(&isk->accept_q)) in smc_accept_poll()
2034 spin_unlock(&isk->accept_q_lock); in smc_accept_poll()
2042 struct sock *sk = sock->sk; in smc_poll()
2043 struct smc_sock *smc; in smc_poll() local
2049 smc = smc_sk(sock->sk); in smc_poll()
2050 if (smc->use_fallback) { in smc_poll()
2052 mask = smc->clcsock->ops->poll(file, smc->clcsock, wait); in smc_poll()
2053 sk->sk_err = smc->clcsock->sk->sk_err; in smc_poll()
2055 if (sk->sk_state != SMC_CLOSED) in smc_poll()
2057 if (sk->sk_err) in smc_poll()
2059 if ((sk->sk_shutdown == SHUTDOWN_MASK) || in smc_poll()
2060 (sk->sk_state == SMC_CLOSED)) in smc_poll()
2062 if (sk->sk_state == SMC_LISTEN) { in smc_poll()
2065 } else if (smc->use_fallback) { /* as result of connect_work()*/ in smc_poll()
2066 mask |= smc->clcsock->ops->poll(file, smc->clcsock, in smc_poll()
2068 sk->sk_err = smc->clcsock->sk->sk_err; in smc_poll()
2070 if ((sk->sk_state != SMC_INIT && in smc_poll()
2071 atomic_read(&smc->conn.sndbuf_space)) || in smc_poll()
2072 sk->sk_shutdown & SEND_SHUTDOWN) { in smc_poll()
2076 set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); in smc_poll()
2078 if (atomic_read(&smc->conn.bytes_to_rcv)) in smc_poll()
2080 if (sk->sk_shutdown & RCV_SHUTDOWN) in smc_poll()
2082 if (sk->sk_state == SMC_APPCLOSEWAIT1) in smc_poll()
2084 if (smc->conn.urg_state == SMC_URG_VALID) in smc_poll()
2094 struct sock *sk = sock->sk; in smc_shutdown()
2095 struct smc_sock *smc; in smc_shutdown() local
2096 int rc = -EINVAL; in smc_shutdown()
2099 smc = smc_sk(sk); in smc_shutdown()
2106 rc = -ENOTCONN; in smc_shutdown()
2107 if ((sk->sk_state != SMC_ACTIVE) && in smc_shutdown()
2108 (sk->sk_state != SMC_PEERCLOSEWAIT1) && in smc_shutdown()
2109 (sk->sk_state != SMC_PEERCLOSEWAIT2) && in smc_shutdown()
2110 (sk->sk_state != SMC_APPCLOSEWAIT1) && in smc_shutdown()
2111 (sk->sk_state != SMC_APPCLOSEWAIT2) && in smc_shutdown()
2112 (sk->sk_state != SMC_APPFINCLOSEWAIT)) in smc_shutdown()
2114 if (smc->use_fallback) { in smc_shutdown()
2115 rc = kernel_sock_shutdown(smc->clcsock, how); in smc_shutdown()
2116 sk->sk_shutdown = smc->clcsock->sk->sk_shutdown; in smc_shutdown()
2117 if (sk->sk_shutdown == SHUTDOWN_MASK) in smc_shutdown()
2118 sk->sk_state = SMC_CLOSED; in smc_shutdown()
2123 rc = smc_close_active(smc); in smc_shutdown()
2126 rc = smc_close_shutdown_write(smc); in smc_shutdown()
2133 if (smc->clcsock) in smc_shutdown()
2134 rc1 = kernel_sock_shutdown(smc->clcsock, how); in smc_shutdown()
2136 sk->sk_shutdown |= how + 1; in smc_shutdown()
2146 struct sock *sk = sock->sk; in smc_setsockopt()
2147 struct smc_sock *smc; in smc_setsockopt() local
2150 smc = smc_sk(sk); in smc_setsockopt()
2155 if (unlikely(!smc->clcsock->ops->setsockopt)) in smc_setsockopt()
2156 rc = -EOPNOTSUPP; in smc_setsockopt()
2158 rc = smc->clcsock->ops->setsockopt(smc->clcsock, level, optname, in smc_setsockopt()
2160 if (smc->clcsock->sk->sk_err) { in smc_setsockopt()
2161 sk->sk_err = smc->clcsock->sk->sk_err; in smc_setsockopt()
2162 sk->sk_error_report(sk); in smc_setsockopt()
2166 return -EINVAL; in smc_setsockopt()
2168 return -EFAULT; in smc_setsockopt()
2171 if (rc || smc->use_fallback) in smc_setsockopt()
2179 /* option not supported by SMC */ in smc_setsockopt()
2180 if (sk->sk_state == SMC_INIT && !smc->connect_nonblock) { in smc_setsockopt()
2181 smc_switch_to_fallback(smc); in smc_setsockopt()
2182 smc->fallback_rsn = SMC_CLC_DECL_OPTUNSUPP; in smc_setsockopt()
2184 rc = -EINVAL; in smc_setsockopt()
2188 if (sk->sk_state != SMC_INIT && in smc_setsockopt()
2189 sk->sk_state != SMC_LISTEN && in smc_setsockopt()
2190 sk->sk_state != SMC_CLOSED) { in smc_setsockopt()
2192 mod_delayed_work(smc->conn.lgr->tx_wq, in smc_setsockopt()
2193 &smc->conn.tx_work, 0); in smc_setsockopt()
2197 if (sk->sk_state != SMC_INIT && in smc_setsockopt()
2198 sk->sk_state != SMC_LISTEN && in smc_setsockopt()
2199 sk->sk_state != SMC_CLOSED) { in smc_setsockopt()
2201 mod_delayed_work(smc->conn.lgr->tx_wq, in smc_setsockopt()
2202 &smc->conn.tx_work, 0); in smc_setsockopt()
2206 smc->sockopt_defer_accept = val; in smc_setsockopt()
2220 struct smc_sock *smc; in smc_getsockopt() local
2222 smc = smc_sk(sock->sk); in smc_getsockopt()
2224 if (unlikely(!smc->clcsock->ops->getsockopt)) in smc_getsockopt()
2225 return -EOPNOTSUPP; in smc_getsockopt()
2226 return smc->clcsock->ops->getsockopt(smc->clcsock, level, optname, in smc_getsockopt()
2235 struct smc_sock *smc; in smc_ioctl() local
2238 smc = smc_sk(sock->sk); in smc_ioctl()
2239 conn = &smc->conn; in smc_ioctl()
2240 lock_sock(&smc->sk); in smc_ioctl()
2241 if (smc->use_fallback) { in smc_ioctl()
2242 if (!smc->clcsock) { in smc_ioctl()
2243 release_sock(&smc->sk); in smc_ioctl()
2244 return -EBADF; in smc_ioctl()
2246 answ = smc->clcsock->ops->ioctl(smc->clcsock, cmd, arg); in smc_ioctl()
2247 release_sock(&smc->sk); in smc_ioctl()
2252 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
2253 release_sock(&smc->sk); in smc_ioctl()
2254 return -EINVAL; in smc_ioctl()
2256 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
2257 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
2260 answ = atomic_read(&smc->conn.bytes_to_rcv); in smc_ioctl()
2264 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
2265 release_sock(&smc->sk); in smc_ioctl()
2266 return -EINVAL; in smc_ioctl()
2268 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
2269 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
2272 answ = smc->conn.sndbuf_desc->len - in smc_ioctl()
2273 atomic_read(&smc->conn.sndbuf_space); in smc_ioctl()
2277 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
2278 release_sock(&smc->sk); in smc_ioctl()
2279 return -EINVAL; in smc_ioctl()
2281 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
2282 smc->sk.sk_state == SMC_CLOSED) in smc_ioctl()
2285 answ = smc_tx_prepared_sends(&smc->conn); in smc_ioctl()
2288 if (smc->sk.sk_state == SMC_LISTEN) { in smc_ioctl()
2289 release_sock(&smc->sk); in smc_ioctl()
2290 return -EINVAL; in smc_ioctl()
2292 if (smc->sk.sk_state == SMC_INIT || in smc_ioctl()
2293 smc->sk.sk_state == SMC_CLOSED) { in smc_ioctl()
2296 smc_curs_copy(&cons, &conn->local_tx_ctrl.cons, conn); in smc_ioctl()
2297 smc_curs_copy(&urg, &conn->urg_curs, conn); in smc_ioctl()
2298 answ = smc_curs_diff(conn->rmb_desc->len, in smc_ioctl()
2303 release_sock(&smc->sk); in smc_ioctl()
2304 return -ENOIOCTLCMD; in smc_ioctl()
2306 release_sock(&smc->sk); in smc_ioctl()
2314 struct sock *sk = sock->sk; in smc_sendpage()
2315 struct smc_sock *smc; in smc_sendpage() local
2316 int rc = -EPIPE; in smc_sendpage()
2318 smc = smc_sk(sk); in smc_sendpage()
2320 if (sk->sk_state != SMC_ACTIVE) { in smc_sendpage()
2325 if (smc->use_fallback) in smc_sendpage()
2326 rc = kernel_sendpage(smc->clcsock, page, offset, in smc_sendpage()
2336 * to splice in conn->splice_pending, and press 'go'. Delays consumer cursor
2345 struct sock *sk = sock->sk; in smc_splice_read()
2346 struct smc_sock *smc; in smc_splice_read() local
2347 int rc = -ENOTCONN; in smc_splice_read()
2349 smc = smc_sk(sk); in smc_splice_read()
2351 if (sk->sk_state == SMC_CLOSED && (sk->sk_shutdown & RCV_SHUTDOWN)) { in smc_splice_read()
2356 if (sk->sk_state == SMC_INIT || in smc_splice_read()
2357 sk->sk_state == SMC_LISTEN || in smc_splice_read()
2358 sk->sk_state == SMC_CLOSED) in smc_splice_read()
2361 if (sk->sk_state == SMC_PEERFINCLOSEWAIT) { in smc_splice_read()
2366 if (smc->use_fallback) { in smc_splice_read()
2367 rc = smc->clcsock->ops->splice_read(smc->clcsock, ppos, in smc_splice_read()
2371 rc = -ESPIPE; in smc_splice_read()
2378 rc = smc_rx_recvmsg(smc, NULL, pipe, len, flags); in smc_splice_read()
2413 struct smc_sock *smc; in smc_create() local
2417 rc = -ESOCKTNOSUPPORT; in smc_create()
2418 if (sock->type != SOCK_STREAM) in smc_create()
2421 rc = -EPROTONOSUPPORT; in smc_create()
2425 rc = -ENOBUFS; in smc_create()
2426 sock->ops = &smc_sock_ops; in smc_create()
2432 smc = smc_sk(sk); in smc_create()
2433 smc->use_fallback = false; /* assume rdma capability first */ in smc_create()
2434 smc->fallback_rsn = 0; in smc_create()
2436 &smc->clcsock); in smc_create()
2441 smc->sk.sk_sndbuf = max(smc->clcsock->sk->sk_sndbuf, SMC_BUF_MIN_SIZE); in smc_create()
2442 smc->sk.sk_rcvbuf = max(smc->clcsock->sk->sk_rcvbuf, SMC_BUF_MIN_SIZE); in smc_create()
2469 .id = &smc_net_id,
2488 rc = -ENOMEM; in smc_init()
2583 MODULE_DESCRIPTION("smc socket address family");