Lines Matching +full:test +full:- +full:manual +full:- +full:mr
1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
6 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
7 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
17 #include "rtrs-clt.h"
18 #include "rtrs-log.h"
19 #include "rtrs-clt-trace.h"
49 .name = "rtrs-client",
58 list_for_each_entry_rcu(clt_path, &clt->paths_list, s.entry) in rtrs_clt_is_connected()
59 if (READ_ONCE(clt_path->state) == RTRS_CLT_CONNECTED) { in rtrs_clt_is_connected()
71 size_t max_depth = clt->queue_depth; in __rtrs_get_permit()
83 bit = find_first_zero_bit(clt->permits_map, max_depth); in __rtrs_get_permit()
86 } while (test_and_set_bit_lock(bit, clt->permits_map)); in __rtrs_get_permit()
89 WARN_ON(permit->mem_id != bit); in __rtrs_get_permit()
90 permit->cpu_id = raw_smp_processor_id(); in __rtrs_get_permit()
91 permit->con_type = con_type; in __rtrs_get_permit()
99 clear_bit_unlock(permit->mem_id, clt->permits_map); in __rtrs_put_permit()
103 * rtrs_clt_get_permit() - allocates permit for future RDMA operation
128 prepare_to_wait(&clt->permits_wait, &wait, in rtrs_clt_get_permit()
137 finish_wait(&clt->permits_wait, &wait); in rtrs_clt_get_permit()
144 * rtrs_clt_put_permit() - puts allocated permit
154 if (WARN_ON(!test_bit(permit->mem_id, clt->permits_map))) in rtrs_clt_put_permit()
160 * rtrs_clt_get_permit() adds itself to the &clt->permits_wait list in rtrs_clt_put_permit()
162 * it must have added itself to &clt->permits_wait before in rtrs_clt_put_permit()
164 * Hence it is safe to guard wake_up() with a waitqueue_active() test. in rtrs_clt_put_permit()
166 if (waitqueue_active(&clt->permits_wait)) in rtrs_clt_put_permit()
167 wake_up(&clt->permits_wait); in rtrs_clt_put_permit()
172 * rtrs_permit_to_clt_con() - returns RDMA connection pointer by the permit
185 if (permit->con_type == RTRS_IO_CON) in rtrs_permit_to_clt_con()
186 id = (permit->cpu_id % (clt_path->s.irq_con_num - 1)) + 1; in rtrs_permit_to_clt_con()
188 return to_clt_con(clt_path->s.con[id]); in rtrs_permit_to_clt_con()
192 * rtrs_clt_change_state() - change the session state through session state
209 lockdep_assert_held(&clt_path->state_wq.lock); in rtrs_clt_change_state()
211 old_state = clt_path->state; in rtrs_clt_change_state()
285 clt_path->state = new_state; in rtrs_clt_change_state()
286 wake_up_locked(&clt_path->state_wq); in rtrs_clt_change_state()
298 spin_lock_irq(&clt_path->state_wq.lock); in rtrs_clt_change_state_from_to()
299 if (clt_path->state == old_state) in rtrs_clt_change_state_from_to()
301 spin_unlock_irq(&clt_path->state_wq.lock); in rtrs_clt_change_state_from_to()
309 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_rdma_error_recovery()
316 queue_work(rtrs_wq, &clt_path->err_recovery_work); in rtrs_rdma_error_recovery()
331 struct rtrs_clt_con *con = to_clt_con(wc->qp->qp_context); in rtrs_clt_fast_reg_done()
333 if (wc->status != IB_WC_SUCCESS) { in rtrs_clt_fast_reg_done()
334 rtrs_err(con->c.path, "Failed IB_WR_REG_MR: %s\n", in rtrs_clt_fast_reg_done()
335 ib_wc_status_msg(wc->status)); in rtrs_clt_fast_reg_done()
350 container_of(wc->wr_cqe, typeof(*req), inv_cqe); in rtrs_clt_inv_rkey_done()
351 struct rtrs_clt_con *con = to_clt_con(wc->qp->qp_context); in rtrs_clt_inv_rkey_done()
353 if (wc->status != IB_WC_SUCCESS) { in rtrs_clt_inv_rkey_done()
354 rtrs_err(con->c.path, "Failed IB_WR_LOCAL_INV: %s\n", in rtrs_clt_inv_rkey_done()
355 ib_wc_status_msg(wc->status)); in rtrs_clt_inv_rkey_done()
358 req->need_inv = false; in rtrs_clt_inv_rkey_done()
359 if (req->need_inv_comp) in rtrs_clt_inv_rkey_done()
360 complete(&req->inv_comp); in rtrs_clt_inv_rkey_done()
363 complete_rdma_req(req, req->inv_errno, true, false); in rtrs_clt_inv_rkey_done()
368 struct rtrs_clt_con *con = req->con; in rtrs_inv_rkey()
371 .wr_cqe = &req->inv_cqe, in rtrs_inv_rkey()
373 .ex.invalidate_rkey = req->mr->rkey, in rtrs_inv_rkey()
375 req->inv_cqe.done = rtrs_clt_inv_rkey_done; in rtrs_inv_rkey()
377 return ib_post_send(con->c.qp, &wr, NULL); in rtrs_inv_rkey()
383 struct rtrs_clt_con *con = req->con; in complete_rdma_req()
387 if (WARN_ON(!req->in_use)) in complete_rdma_req()
389 if (WARN_ON(!req->con)) in complete_rdma_req()
391 clt_path = to_clt_path(con->c.path); in complete_rdma_req()
393 if (req->sg_cnt) { in complete_rdma_req()
394 if (req->dir == DMA_FROM_DEVICE && req->need_inv) { in complete_rdma_req()
410 req->need_inv_comp = true; in complete_rdma_req()
415 req->inv_errno = errno; in complete_rdma_req()
418 refcount_inc(&req->ref); in complete_rdma_req()
421 rtrs_err(con->c.path, "Send INV WR key=%#x: %d\n", in complete_rdma_req()
422 req->mr->rkey, err); in complete_rdma_req()
424 wait_for_completion(&req->inv_comp); in complete_rdma_req()
434 if (!refcount_dec_and_test(&req->ref)) in complete_rdma_req()
437 ib_dma_unmap_sg(clt_path->s.dev->ib_dev, req->sglist, in complete_rdma_req()
438 req->sg_cnt, req->dir); in complete_rdma_req()
440 if (!refcount_dec_and_test(&req->ref)) in complete_rdma_req()
442 if (req->mp_policy == MP_POLICY_MIN_INFLIGHT) in complete_rdma_req()
443 atomic_dec(&clt_path->stats->inflight); in complete_rdma_req()
445 req->in_use = false; in complete_rdma_req()
446 req->con = NULL; in complete_rdma_req()
449 rtrs_err_rl(con->c.path, "IO request failed: error=%d path=%s [%s:%u] notify=%d\n", in complete_rdma_req()
450 errno, kobject_name(&clt_path->kobj), clt_path->hca_name, in complete_rdma_req()
451 clt_path->hca_port, notify); in complete_rdma_req()
455 req->conf(req->priv, errno); in complete_rdma_req()
463 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_post_send_rdma()
467 if (!req->sg_size) { in rtrs_post_send_rdma()
468 rtrs_wrn(con->c.path, in rtrs_post_send_rdma()
470 return -EINVAL; in rtrs_post_send_rdma()
474 sge.addr = req->iu->dma_addr; in rtrs_post_send_rdma()
475 sge.length = req->sg_size; in rtrs_post_send_rdma()
476 sge.lkey = clt_path->s.dev->ib_pd->local_dma_lkey; in rtrs_post_send_rdma()
482 flags = atomic_inc_return(&con->c.wr_cnt) % clt_path->s.signal_interval ? in rtrs_post_send_rdma()
485 ib_dma_sync_single_for_device(clt_path->s.dev->ib_dev, in rtrs_post_send_rdma()
486 req->iu->dma_addr, in rtrs_post_send_rdma()
487 req->sg_size, DMA_TO_DEVICE); in rtrs_post_send_rdma()
489 return rtrs_iu_post_rdma_write_imm(&con->c, req->iu, &sge, 1, in rtrs_post_send_rdma()
490 rbuf->rkey, rbuf->addr + off, in rtrs_post_send_rdma()
499 if (WARN_ON(msg_id >= clt_path->queue_depth)) in process_io_rsp()
502 req = &clt_path->reqs[msg_id]; in process_io_rsp()
504 req->need_inv &= !w_inval; in process_io_rsp()
512 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_clt_recv_done()
514 WARN_ON((clt_path->flags & RTRS_MSG_NEW_RKEY_F) == 0); in rtrs_clt_recv_done()
515 iu = container_of(wc->wr_cqe, struct rtrs_iu, in rtrs_clt_recv_done()
517 err = rtrs_iu_post_recv(&con->c, iu); in rtrs_clt_recv_done()
519 rtrs_err(con->c.path, "post iu failed %d\n", err); in rtrs_clt_recv_done()
526 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_clt_rkey_rsp_done()
534 WARN_ON((clt_path->flags & RTRS_MSG_NEW_RKEY_F) == 0); in rtrs_clt_rkey_rsp_done()
536 iu = container_of(wc->wr_cqe, struct rtrs_iu, cqe); in rtrs_clt_rkey_rsp_done()
538 if (wc->byte_len < sizeof(*msg)) { in rtrs_clt_rkey_rsp_done()
539 rtrs_err(con->c.path, "rkey response is malformed: size %d\n", in rtrs_clt_rkey_rsp_done()
540 wc->byte_len); in rtrs_clt_rkey_rsp_done()
543 ib_dma_sync_single_for_cpu(clt_path->s.dev->ib_dev, iu->dma_addr, in rtrs_clt_rkey_rsp_done()
544 iu->size, DMA_FROM_DEVICE); in rtrs_clt_rkey_rsp_done()
545 msg = iu->buf; in rtrs_clt_rkey_rsp_done()
546 if (le16_to_cpu(msg->type) != RTRS_MSG_RKEY_RSP) { in rtrs_clt_rkey_rsp_done()
547 rtrs_err(clt_path->clt, in rtrs_clt_rkey_rsp_done()
549 le16_to_cpu(msg->type)); in rtrs_clt_rkey_rsp_done()
552 buf_id = le16_to_cpu(msg->buf_id); in rtrs_clt_rkey_rsp_done()
553 if (WARN_ON(buf_id >= clt_path->queue_depth)) in rtrs_clt_rkey_rsp_done()
556 rtrs_from_imm(be32_to_cpu(wc->ex.imm_data), &imm_type, &imm_payload); in rtrs_clt_rkey_rsp_done()
566 clt_path->rbufs[buf_id].rkey = le32_to_cpu(msg->rkey); in rtrs_clt_rkey_rsp_done()
569 ib_dma_sync_single_for_device(clt_path->s.dev->ib_dev, iu->dma_addr, in rtrs_clt_rkey_rsp_done()
570 iu->size, DMA_FROM_DEVICE); in rtrs_clt_rkey_rsp_done()
594 wr->wr_cqe = cqe; in rtrs_post_recv_empty_x2()
597 wr->next = &wr_arr[i - 1]; in rtrs_post_recv_empty_x2()
600 return ib_post_recv(con->qp, wr, NULL); in rtrs_post_recv_empty_x2()
605 struct rtrs_clt_con *con = to_clt_con(wc->qp->qp_context); in rtrs_clt_rdma_done()
606 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_clt_rdma_done()
611 if (wc->status != IB_WC_SUCCESS) { in rtrs_clt_rdma_done()
612 if (wc->status != IB_WC_WR_FLUSH_ERR) { in rtrs_clt_rdma_done()
613 rtrs_err(clt_path->clt, "RDMA failed: %s\n", in rtrs_clt_rdma_done()
614 ib_wc_status_msg(wc->status)); in rtrs_clt_rdma_done()
621 switch (wc->opcode) { in rtrs_clt_rdma_done()
627 if (WARN_ON(wc->wr_cqe->done != rtrs_clt_rdma_done)) in rtrs_clt_rdma_done()
629 rtrs_from_imm(be32_to_cpu(wc->ex.imm_data), in rtrs_clt_rdma_done()
640 WARN_ON(con->c.cid); in rtrs_clt_rdma_done()
641 rtrs_send_hb_ack(&clt_path->s); in rtrs_clt_rdma_done()
642 if (clt_path->flags & RTRS_MSG_NEW_RKEY_F) in rtrs_clt_rdma_done()
645 WARN_ON(con->c.cid); in rtrs_clt_rdma_done()
646 clt_path->s.hb_missed_cnt = 0; in rtrs_clt_rdma_done()
647 clt_path->s.hb_cur_latency = in rtrs_clt_rdma_done()
648 ktime_sub(ktime_get(), clt_path->s.hb_last_sent); in rtrs_clt_rdma_done()
649 if (clt_path->flags & RTRS_MSG_NEW_RKEY_F) in rtrs_clt_rdma_done()
652 rtrs_wrn(con->c.path, "Unknown IMM type %u\n", in rtrs_clt_rdma_done()
660 err = rtrs_post_recv_empty_x2(&con->c, &io_comp_cqe); in rtrs_clt_rdma_done()
662 err = rtrs_post_recv_empty(&con->c, &io_comp_cqe); in rtrs_clt_rdma_done()
664 rtrs_err(con->c.path, "rtrs_post_recv_empty(): %d\n", in rtrs_clt_rdma_done()
673 WARN_ON(!(wc->wc_flags & IB_WC_WITH_INVALIDATE || in rtrs_clt_rdma_done()
674 wc->wc_flags & IB_WC_WITH_IMM)); in rtrs_clt_rdma_done()
675 WARN_ON(wc->wr_cqe->done != rtrs_clt_rdma_done); in rtrs_clt_rdma_done()
676 if (clt_path->flags & RTRS_MSG_NEW_RKEY_F) { in rtrs_clt_rdma_done()
677 if (wc->wc_flags & IB_WC_WITH_INVALIDATE) in rtrs_clt_rdma_done()
691 rtrs_wrn(clt_path->clt, "Unexpected WC type: %d\n", wc->opcode); in rtrs_clt_rdma_done()
699 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in post_recv_io()
702 if (clt_path->flags & RTRS_MSG_NEW_RKEY_F) { in post_recv_io()
703 struct rtrs_iu *iu = &con->rsp_ius[i]; in post_recv_io()
705 err = rtrs_iu_post_recv(&con->c, iu); in post_recv_io()
707 err = rtrs_post_recv_empty(&con->c, &io_comp_cqe); in post_recv_io()
721 for (cid = 0; cid < clt_path->s.con_num; cid++) { in post_recv_path()
725 q_size = clt_path->queue_depth; in post_recv_path()
733 err = post_recv_io(to_clt_con(clt_path->s.con[cid]), q_size); in post_recv_path()
735 rtrs_err(clt_path->clt, "post_recv_io(), err: %d\n", in post_recv_path()
752 * rtrs_clt_get_next_path_or_null - get clt path from the list or return NULL
756 * Next clt path returned in round-robin fashion, i.e. head will be skipped,
759 * This function may safely run concurrently with the _rcu list-mutation
765 return list_next_or_null_rcu(head, &clt_path->s.entry, typeof(*clt_path), s.entry) ?: in rtrs_clt_get_next_path_or_null()
767 READ_ONCE((&clt_path->s.entry)->next), in rtrs_clt_get_next_path_or_null()
772 * get_next_path_rr() - Returns path in round-robin fashion.
786 clt = it->clt; in get_next_path_rr()
794 ppcpu_path = this_cpu_ptr(clt->pcpu_path); in get_next_path_rr()
797 path = list_first_or_null_rcu(&clt->paths_list, in get_next_path_rr()
800 path = rtrs_clt_get_next_path_or_null(&clt->paths_list, path); in get_next_path_rr()
808 * get_next_path_min_inflight() - Returns path with minimal inflight count.
819 struct rtrs_clt_sess *clt = it->clt; in get_next_path_min_inflight()
824 list_for_each_entry_rcu(clt_path, &clt->paths_list, s.entry) { in get_next_path_min_inflight()
825 if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTED) in get_next_path_min_inflight()
828 if (!list_empty(raw_cpu_ptr(clt_path->mp_skip_entry))) in get_next_path_min_inflight()
831 inflight = atomic_read(&clt_path->stats->inflight); in get_next_path_min_inflight()
844 list_add(raw_cpu_ptr(min_path->mp_skip_entry), &it->skip_list); in get_next_path_min_inflight()
850 * get_next_path_min_latency() - Returns path with minimal latency.
860 * This DOES skip an already-tried path.
861 * There is a skip-list to skip a path if the path has tried but failed.
870 struct rtrs_clt_sess *clt = it->clt; in get_next_path_min_latency()
875 list_for_each_entry_rcu(clt_path, &clt->paths_list, s.entry) { in get_next_path_min_latency()
876 if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTED) in get_next_path_min_latency()
879 if (!list_empty(raw_cpu_ptr(clt_path->mp_skip_entry))) in get_next_path_min_latency()
882 latency = clt_path->s.hb_cur_latency; in get_next_path_min_latency()
895 list_add(raw_cpu_ptr(min_path->mp_skip_entry), &it->skip_list); in get_next_path_min_latency()
902 INIT_LIST_HEAD(&it->skip_list); in path_it_init()
903 it->clt = clt; in path_it_init()
904 it->i = 0; in path_it_init()
906 if (clt->mp_policy == MP_POLICY_RR) in path_it_init()
907 it->next_path = get_next_path_rr; in path_it_init()
908 else if (clt->mp_policy == MP_POLICY_MIN_INFLIGHT) in path_it_init()
909 it->next_path = get_next_path_min_inflight; in path_it_init()
911 it->next_path = get_next_path_min_latency; in path_it_init()
920 * paths (->mp_skip_entry) into a skip_list again. in path_it_deinit()
922 list_for_each_safe(skip, tmp, &it->skip_list) in path_it_deinit()
927 * rtrs_clt_init_req() - Initialize an rtrs_clt_io_req holding information
930 * the corresponding buffer of rtrs_iu (req->iu->buf), which later on will
955 req->permit = permit; in rtrs_clt_init_req()
956 req->in_use = true; in rtrs_clt_init_req()
957 req->usr_len = usr_len; in rtrs_clt_init_req()
958 req->data_len = data_len; in rtrs_clt_init_req()
959 req->sglist = sg; in rtrs_clt_init_req()
960 req->sg_cnt = sg_cnt; in rtrs_clt_init_req()
961 req->priv = priv; in rtrs_clt_init_req()
962 req->dir = dir; in rtrs_clt_init_req()
963 req->con = rtrs_permit_to_clt_con(clt_path, permit); in rtrs_clt_init_req()
964 req->conf = conf; in rtrs_clt_init_req()
965 req->need_inv = false; in rtrs_clt_init_req()
966 req->need_inv_comp = false; in rtrs_clt_init_req()
967 req->inv_errno = 0; in rtrs_clt_init_req()
968 refcount_set(&req->ref, 1); in rtrs_clt_init_req()
969 req->mp_policy = clt_path->clt->mp_policy; in rtrs_clt_init_req()
972 len = _copy_from_iter(req->iu->buf, usr_len, &iter); in rtrs_clt_init_req()
975 reinit_completion(&req->inv_comp); in rtrs_clt_init_req()
988 req = &clt_path->reqs[permit->mem_id]; in rtrs_clt_get_req()
1000 .iov_base = fail_req->iu->buf, in rtrs_clt_get_copy_req()
1001 .iov_len = fail_req->usr_len in rtrs_clt_get_copy_req()
1004 req = &alive_path->reqs[fail_req->permit->mem_id]; in rtrs_clt_get_copy_req()
1005 rtrs_clt_init_req(req, alive_path, fail_req->conf, fail_req->permit, in rtrs_clt_get_copy_req()
1006 fail_req->priv, &vec, fail_req->usr_len, in rtrs_clt_get_copy_req()
1007 fail_req->sglist, fail_req->sg_cnt, in rtrs_clt_get_copy_req()
1008 fail_req->data_len, fail_req->dir); in rtrs_clt_get_copy_req()
1019 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_post_rdma_write_sg()
1020 struct ib_sge *sge = req->sge; in rtrs_post_rdma_write_sg()
1029 sge[i].addr = req->mr->iova; in rtrs_post_rdma_write_sg()
1030 sge[i].length = req->mr->length; in rtrs_post_rdma_write_sg()
1031 sge[i].lkey = req->mr->lkey; in rtrs_post_rdma_write_sg()
1036 for_each_sg(req->sglist, sg, count, i) { in rtrs_post_rdma_write_sg()
1039 sge[i].lkey = clt_path->s.dev->ib_pd->local_dma_lkey; in rtrs_post_rdma_write_sg()
1043 sge[i].addr = req->iu->dma_addr; in rtrs_post_rdma_write_sg()
1045 sge[i].lkey = clt_path->s.dev->ib_pd->local_dma_lkey; in rtrs_post_rdma_write_sg()
1051 flags = atomic_inc_return(&con->c.wr_cnt) % clt_path->s.signal_interval ? in rtrs_post_rdma_write_sg()
1054 ib_dma_sync_single_for_device(clt_path->s.dev->ib_dev, in rtrs_post_rdma_write_sg()
1055 req->iu->dma_addr, in rtrs_post_rdma_write_sg()
1058 return rtrs_iu_post_rdma_write_imm(&con->c, req->iu, sge, num_sge, in rtrs_post_rdma_write_sg()
1059 rbuf->rkey, rbuf->addr, imm, in rtrs_post_rdma_write_sg()
1067 /* Align the MR to a 4K page size to match the block virt boundary */ in rtrs_map_sg_fr()
1068 nr = ib_map_mr_sg(req->mr, req->sglist, count, NULL, SZ_4K); in rtrs_map_sg_fr()
1070 return nr < 0 ? nr : -EINVAL; in rtrs_map_sg_fr()
1071 ib_update_fast_reg_key(req->mr, ib_inc_rkey(req->mr->rkey)); in rtrs_map_sg_fr()
1078 struct rtrs_clt_con *con = req->con; in rtrs_clt_write_req()
1079 struct rtrs_path *s = con->c.path; in rtrs_clt_write_req()
1091 const size_t tsize = sizeof(*msg) + req->data_len + req->usr_len; in rtrs_clt_write_req()
1093 if (tsize > clt_path->chunk_size) { in rtrs_clt_write_req()
1095 tsize, clt_path->chunk_size); in rtrs_clt_write_req()
1096 return -EMSGSIZE; in rtrs_clt_write_req()
1098 if (req->sg_cnt) { in rtrs_clt_write_req()
1099 count = ib_dma_map_sg(clt_path->s.dev->ib_dev, req->sglist, in rtrs_clt_write_req()
1100 req->sg_cnt, req->dir); in rtrs_clt_write_req()
1103 return -EINVAL; in rtrs_clt_write_req()
1107 msg = req->iu->buf + req->usr_len; in rtrs_clt_write_req()
1108 msg->type = cpu_to_le16(RTRS_MSG_WRITE); in rtrs_clt_write_req()
1109 msg->usr_len = cpu_to_le16(req->usr_len); in rtrs_clt_write_req()
1112 imm = req->permit->mem_off + req->data_len + req->usr_len; in rtrs_clt_write_req()
1114 buf_id = req->permit->mem_id; in rtrs_clt_write_req()
1115 req->sg_size = tsize; in rtrs_clt_write_req()
1116 rbuf = &clt_path->rbufs[buf_id]; in rtrs_clt_write_req()
1124 ib_dma_unmap_sg(clt_path->s.dev->ib_dev, req->sglist, in rtrs_clt_write_req()
1125 req->sg_cnt, req->dir); in rtrs_clt_write_req()
1130 .wr_cqe = &req->inv_cqe, in rtrs_clt_write_req()
1132 .ex.invalidate_rkey = req->mr->rkey, in rtrs_clt_write_req()
1134 req->inv_cqe.done = rtrs_clt_inv_rkey_done; in rtrs_clt_write_req()
1138 .mr = req->mr, in rtrs_clt_write_req()
1139 .key = req->mr->rkey, in rtrs_clt_write_req()
1144 refcount_inc(&req->ref); in rtrs_clt_write_req()
1152 ret = rtrs_post_rdma_write_sg(req->con, req, rbuf, fr_en, count, in rtrs_clt_write_req()
1153 req->usr_len + sizeof(*msg), in rtrs_clt_write_req()
1158 ret, kobject_name(&clt_path->kobj), clt_path->hca_name, in rtrs_clt_write_req()
1159 clt_path->hca_port); in rtrs_clt_write_req()
1160 if (req->mp_policy == MP_POLICY_MIN_INFLIGHT) in rtrs_clt_write_req()
1161 atomic_dec(&clt_path->stats->inflight); in rtrs_clt_write_req()
1162 if (req->sg_cnt) in rtrs_clt_write_req()
1163 ib_dma_unmap_sg(clt_path->s.dev->ib_dev, req->sglist, in rtrs_clt_write_req()
1164 req->sg_cnt, req->dir); in rtrs_clt_write_req()
1172 struct rtrs_clt_con *con = req->con; in rtrs_clt_read_req()
1173 struct rtrs_path *s = con->c.path; in rtrs_clt_read_req()
1176 struct rtrs_ib_dev *dev = clt_path->s.dev; in rtrs_clt_read_req()
1184 const size_t tsize = sizeof(*msg) + req->data_len + req->usr_len; in rtrs_clt_read_req()
1186 if (tsize > clt_path->chunk_size) { in rtrs_clt_read_req()
1189 tsize, clt_path->chunk_size); in rtrs_clt_read_req()
1190 return -EMSGSIZE; in rtrs_clt_read_req()
1193 if (req->sg_cnt) { in rtrs_clt_read_req()
1194 count = ib_dma_map_sg(dev->ib_dev, req->sglist, req->sg_cnt, in rtrs_clt_read_req()
1195 req->dir); in rtrs_clt_read_req()
1199 return -EINVAL; in rtrs_clt_read_req()
1202 /* put our message into req->buf after user message*/ in rtrs_clt_read_req()
1203 msg = req->iu->buf + req->usr_len; in rtrs_clt_read_req()
1204 msg->type = cpu_to_le16(RTRS_MSG_READ); in rtrs_clt_read_req()
1205 msg->usr_len = cpu_to_le16(req->usr_len); in rtrs_clt_read_req()
1213 ib_dma_unmap_sg(dev->ib_dev, req->sglist, req->sg_cnt, in rtrs_clt_read_req()
1214 req->dir); in rtrs_clt_read_req()
1220 .mr = req->mr, in rtrs_clt_read_req()
1221 .key = req->mr->rkey, in rtrs_clt_read_req()
1227 msg->sg_cnt = cpu_to_le16(1); in rtrs_clt_read_req()
1228 msg->flags = cpu_to_le16(RTRS_MSG_NEED_INVAL_F); in rtrs_clt_read_req()
1230 msg->desc[0].addr = cpu_to_le64(req->mr->iova); in rtrs_clt_read_req()
1231 msg->desc[0].key = cpu_to_le32(req->mr->rkey); in rtrs_clt_read_req()
1232 msg->desc[0].len = cpu_to_le32(req->mr->length); in rtrs_clt_read_req()
1235 req->need_inv = !!RTRS_MSG_NEED_INVAL_F; in rtrs_clt_read_req()
1238 msg->sg_cnt = 0; in rtrs_clt_read_req()
1239 msg->flags = 0; in rtrs_clt_read_req()
1245 imm = req->permit->mem_off + req->data_len + req->usr_len; in rtrs_clt_read_req()
1247 buf_id = req->permit->mem_id; in rtrs_clt_read_req()
1249 req->sg_size = sizeof(*msg); in rtrs_clt_read_req()
1250 req->sg_size += le16_to_cpu(msg->sg_cnt) * sizeof(struct rtrs_sg_desc); in rtrs_clt_read_req()
1251 req->sg_size += req->usr_len; in rtrs_clt_read_req()
1259 ret = rtrs_post_send_rdma(req->con, req, &clt_path->rbufs[buf_id], in rtrs_clt_read_req()
1260 req->data_len, imm, wr); in rtrs_clt_read_req()
1264 ret, kobject_name(&clt_path->kobj), clt_path->hca_name, in rtrs_clt_read_req()
1265 clt_path->hca_port); in rtrs_clt_read_req()
1266 if (req->mp_policy == MP_POLICY_MIN_INFLIGHT) in rtrs_clt_read_req()
1267 atomic_dec(&clt_path->stats->inflight); in rtrs_clt_read_req()
1268 req->need_inv = false; in rtrs_clt_read_req()
1269 if (req->sg_cnt) in rtrs_clt_read_req()
1270 ib_dma_unmap_sg(dev->ib_dev, req->sglist, in rtrs_clt_read_req()
1271 req->sg_cnt, req->dir); in rtrs_clt_read_req()
1278 * rtrs_clt_failover_req() - Try to find an active path for a failed request
1287 int err = -ECONNABORTED; in rtrs_clt_failover_req()
1292 (alive_path = it.next_path(&it)) && it.i < it.clt->paths_num; in rtrs_clt_failover_req()
1294 if (READ_ONCE(alive_path->state) != RTRS_CLT_CONNECTED) in rtrs_clt_failover_req()
1297 if (req->dir == DMA_TO_DEVICE) in rtrs_clt_failover_req()
1302 req->in_use = false; in rtrs_clt_failover_req()
1306 rtrs_clt_inc_failover_cnt(alive_path->stats); in rtrs_clt_failover_req()
1317 struct rtrs_clt_sess *clt = clt_path->clt; in fail_all_outstanding_reqs()
1321 if (!clt_path->reqs) in fail_all_outstanding_reqs()
1323 for (i = 0; i < clt_path->queue_depth; ++i) { in fail_all_outstanding_reqs()
1324 req = &clt_path->reqs[i]; in fail_all_outstanding_reqs()
1325 if (!req->in_use) in fail_all_outstanding_reqs()
1333 complete_rdma_req(req, -ECONNABORTED, false, true); in fail_all_outstanding_reqs()
1338 req->conf(req->priv, err); in fail_all_outstanding_reqs()
1347 if (!clt_path->reqs) in free_path_reqs()
1349 for (i = 0; i < clt_path->queue_depth; ++i) { in free_path_reqs()
1350 req = &clt_path->reqs[i]; in free_path_reqs()
1351 if (req->mr) in free_path_reqs()
1352 ib_dereg_mr(req->mr); in free_path_reqs()
1353 kfree(req->sge); in free_path_reqs()
1354 rtrs_iu_free(req->iu, clt_path->s.dev->ib_dev, 1); in free_path_reqs()
1356 kfree(clt_path->reqs); in free_path_reqs()
1357 clt_path->reqs = NULL; in free_path_reqs()
1363 int i, err = -ENOMEM; in alloc_path_reqs()
1365 clt_path->reqs = kcalloc(clt_path->queue_depth, in alloc_path_reqs()
1366 sizeof(*clt_path->reqs), in alloc_path_reqs()
1368 if (!clt_path->reqs) in alloc_path_reqs()
1369 return -ENOMEM; in alloc_path_reqs()
1371 for (i = 0; i < clt_path->queue_depth; ++i) { in alloc_path_reqs()
1372 req = &clt_path->reqs[i]; in alloc_path_reqs()
1373 req->iu = rtrs_iu_alloc(1, clt_path->max_hdr_size, GFP_KERNEL, in alloc_path_reqs()
1374 clt_path->s.dev->ib_dev, in alloc_path_reqs()
1377 if (!req->iu) in alloc_path_reqs()
1380 req->sge = kcalloc(2, sizeof(*req->sge), GFP_KERNEL); in alloc_path_reqs()
1381 if (!req->sge) in alloc_path_reqs()
1384 req->mr = ib_alloc_mr(clt_path->s.dev->ib_pd, in alloc_path_reqs()
1386 clt_path->max_pages_per_mr); in alloc_path_reqs()
1387 if (IS_ERR(req->mr)) { in alloc_path_reqs()
1388 err = PTR_ERR(req->mr); in alloc_path_reqs()
1389 req->mr = NULL; in alloc_path_reqs()
1390 pr_err("Failed to alloc clt_path->max_pages_per_mr %d\n", in alloc_path_reqs()
1391 clt_path->max_pages_per_mr); in alloc_path_reqs()
1395 init_completion(&req->inv_comp); in alloc_path_reqs()
1411 clt->permits_map = bitmap_zalloc(clt->queue_depth, GFP_KERNEL); in alloc_permits()
1412 if (!clt->permits_map) { in alloc_permits()
1413 err = -ENOMEM; in alloc_permits()
1416 clt->permits = kcalloc(clt->queue_depth, permit_size(clt), GFP_KERNEL); in alloc_permits()
1417 if (!clt->permits) { in alloc_permits()
1418 err = -ENOMEM; in alloc_permits()
1421 chunk_bits = ilog2(clt->queue_depth - 1) + 1; in alloc_permits()
1422 for (i = 0; i < clt->queue_depth; i++) { in alloc_permits()
1426 permit->mem_id = i; in alloc_permits()
1427 permit->mem_off = i << (MAX_IMM_PAYL_BITS - chunk_bits); in alloc_permits()
1433 bitmap_free(clt->permits_map); in alloc_permits()
1434 clt->permits_map = NULL; in alloc_permits()
1441 if (clt->permits_map) in free_permits()
1442 wait_event(clt->permits_wait, in free_permits()
1443 bitmap_empty(clt->permits_map, clt->queue_depth)); in free_permits()
1445 bitmap_free(clt->permits_map); in free_permits()
1446 clt->permits_map = NULL; in free_permits()
1447 kfree(clt->permits); in free_permits()
1448 clt->permits = NULL; in free_permits()
1457 ib_dev = clt_path->s.dev->ib_dev; in query_fast_reg_mode()
1464 mr_page_shift = max(12, ffs(ib_dev->attrs.page_size_cap) - 1); in query_fast_reg_mode()
1465 max_pages_per_mr = ib_dev->attrs.max_mr_size; in query_fast_reg_mode()
1467 clt_path->max_pages_per_mr = in query_fast_reg_mode()
1468 min3(clt_path->max_pages_per_mr, (u32)max_pages_per_mr, in query_fast_reg_mode()
1469 ib_dev->attrs.max_fast_reg_page_list_len); in query_fast_reg_mode()
1470 clt_path->clt->max_segments = in query_fast_reg_mode()
1471 min(clt_path->max_pages_per_mr, clt_path->clt->max_segments); in query_fast_reg_mode()
1480 spin_lock_irq(&clt_path->state_wq.lock); in rtrs_clt_change_state_get_old()
1482 *old_state = clt_path->state; in rtrs_clt_change_state_get_old()
1484 spin_unlock_irq(&clt_path->state_wq.lock); in rtrs_clt_change_state_get_old()
1498 rtrs_init_hb(&clt_path->s, &io_comp_cqe, in rtrs_clt_init_hb()
1515 clt = clt_path->clt; in rtrs_clt_err_recovery_work()
1516 delay_ms = clt->reconnect_delay_sec * 1000; in rtrs_clt_err_recovery_work()
1518 queue_delayed_work(rtrs_wq, &clt_path->reconnect_dwork, in rtrs_clt_err_recovery_work()
1528 int err = -ENOMEM; in alloc_path()
1541 clt_path->s.con = kcalloc(total_con, sizeof(*clt_path->s.con), in alloc_path()
1543 if (!clt_path->s.con) in alloc_path()
1546 clt_path->s.con_num = total_con; in alloc_path()
1547 clt_path->s.irq_con_num = con_num + 1; in alloc_path()
1549 clt_path->stats = kzalloc(sizeof(*clt_path->stats), GFP_KERNEL); in alloc_path()
1550 if (!clt_path->stats) in alloc_path()
1553 mutex_init(&clt_path->init_mutex); in alloc_path()
1554 uuid_gen(&clt_path->s.uuid); in alloc_path()
1555 memcpy(&clt_path->s.dst_addr, path->dst, in alloc_path()
1556 rdma_addr_size((struct sockaddr *)path->dst)); in alloc_path()
1560 * checks the sa_family to be non-zero. If user passed src_addr=NULL in alloc_path()
1561 * the sess->src_addr will contain only zeros, which is then fine. in alloc_path()
1563 if (path->src) in alloc_path()
1564 memcpy(&clt_path->s.src_addr, path->src, in alloc_path()
1565 rdma_addr_size((struct sockaddr *)path->src)); in alloc_path()
1566 strscpy(clt_path->s.sessname, clt->sessname, in alloc_path()
1567 sizeof(clt_path->s.sessname)); in alloc_path()
1568 clt_path->clt = clt; in alloc_path()
1569 clt_path->max_pages_per_mr = RTRS_MAX_SEGMENTS; in alloc_path()
1570 init_waitqueue_head(&clt_path->state_wq); in alloc_path()
1571 clt_path->state = RTRS_CLT_CONNECTING; in alloc_path()
1572 atomic_set(&clt_path->connected_cnt, 0); in alloc_path()
1573 INIT_WORK(&clt_path->close_work, rtrs_clt_close_work); in alloc_path()
1574 INIT_WORK(&clt_path->err_recovery_work, rtrs_clt_err_recovery_work); in alloc_path()
1575 INIT_DELAYED_WORK(&clt_path->reconnect_dwork, rtrs_clt_reconnect_work); in alloc_path()
1578 clt_path->mp_skip_entry = alloc_percpu(typeof(*clt_path->mp_skip_entry)); in alloc_path()
1579 if (!clt_path->mp_skip_entry) in alloc_path()
1583 INIT_LIST_HEAD(per_cpu_ptr(clt_path->mp_skip_entry, cpu)); in alloc_path()
1585 err = rtrs_clt_init_stats(clt_path->stats); in alloc_path()
1592 free_percpu(clt_path->mp_skip_entry); in alloc_path()
1594 kfree(clt_path->stats); in alloc_path()
1596 kfree(clt_path->s.con); in alloc_path()
1605 free_percpu(clt_path->mp_skip_entry); in free_path()
1606 mutex_destroy(&clt_path->init_mutex); in free_path()
1607 kfree(clt_path->s.con); in free_path()
1608 kfree(clt_path->rbufs); in free_path()
1618 return -ENOMEM; in create_con()
1621 con->cpu = (cid ? cid - 1 : 0) % nr_cpu_ids; in create_con()
1622 con->c.cid = cid; in create_con()
1623 con->c.path = &clt_path->s; in create_con()
1625 atomic_set(&con->c.wr_cnt, 1); in create_con()
1626 mutex_init(&con->con_mutex); in create_con()
1628 clt_path->s.con[cid] = &con->c; in create_con()
1635 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in destroy_con()
1637 clt_path->s.con[con->c.cid] = NULL; in destroy_con()
1638 mutex_destroy(&con->con_mutex); in destroy_con()
1644 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in create_con_cq_qp()
1649 lockdep_assert_held(&con->con_mutex); in create_con_cq_qp()
1650 if (con->c.cid == 0) { in create_con_cq_qp()
1653 if (WARN_ON(clt_path->s.dev)) in create_con_cq_qp()
1654 return -EINVAL; in create_con_cq_qp()
1661 clt_path->s.dev = rtrs_ib_dev_find_or_add(con->c.cm_id->device, in create_con_cq_qp()
1663 if (!clt_path->s.dev) { in create_con_cq_qp()
1664 rtrs_wrn(clt_path->clt, in create_con_cq_qp()
1666 return -ENOMEM; in create_con_cq_qp()
1668 clt_path->s.dev_ref = 1; in create_con_cq_qp()
1670 wr_limit = clt_path->s.dev->ib_dev->attrs.max_qp_wr; in create_con_cq_qp()
1687 if (WARN_ON(!clt_path->s.dev)) in create_con_cq_qp()
1688 return -EINVAL; in create_con_cq_qp()
1689 if (WARN_ON(!clt_path->queue_depth)) in create_con_cq_qp()
1690 return -EINVAL; in create_con_cq_qp()
1692 wr_limit = clt_path->s.dev->ib_dev->attrs.max_qp_wr; in create_con_cq_qp()
1694 clt_path->s.dev_ref++; in create_con_cq_qp()
1697 clt_path->queue_depth * 3 + 1); in create_con_cq_qp()
1699 clt_path->queue_depth * 3 + 1); in create_con_cq_qp()
1702 atomic_set(&con->c.sq_wr_avail, max_send_wr); in create_con_cq_qp()
1705 if (clt_path->flags & RTRS_MSG_NEW_RKEY_F || con->c.cid == 0) { in create_con_cq_qp()
1706 con->rsp_ius = rtrs_iu_alloc(cq_num, sizeof(*rsp), in create_con_cq_qp()
1708 clt_path->s.dev->ib_dev, in create_con_cq_qp()
1711 if (!con->rsp_ius) in create_con_cq_qp()
1712 return -ENOMEM; in create_con_cq_qp()
1713 con->queue_num = cq_num; in create_con_cq_qp()
1715 cq_vector = con->cpu % clt_path->s.dev->ib_dev->num_comp_vectors; in create_con_cq_qp()
1716 if (con->c.cid >= clt_path->s.irq_con_num) in create_con_cq_qp()
1717 err = rtrs_cq_qp_create(&clt_path->s, &con->c, max_send_sge, in create_con_cq_qp()
1721 err = rtrs_cq_qp_create(&clt_path->s, &con->c, max_send_sge, in create_con_cq_qp()
1733 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in destroy_con_cq_qp()
1739 lockdep_assert_held(&con->con_mutex); in destroy_con_cq_qp()
1740 rtrs_cq_qp_destroy(&con->c); in destroy_con_cq_qp()
1741 if (con->rsp_ius) { in destroy_con_cq_qp()
1742 rtrs_iu_free(con->rsp_ius, clt_path->s.dev->ib_dev, in destroy_con_cq_qp()
1743 con->queue_num); in destroy_con_cq_qp()
1744 con->rsp_ius = NULL; in destroy_con_cq_qp()
1745 con->queue_num = 0; in destroy_con_cq_qp()
1747 if (clt_path->s.dev_ref && !--clt_path->s.dev_ref) { in destroy_con_cq_qp()
1748 rtrs_ib_dev_put(clt_path->s.dev); in destroy_con_cq_qp()
1749 clt_path->s.dev = NULL; in destroy_con_cq_qp()
1755 rdma_disconnect(con->c.cm_id); in stop_cm()
1756 if (con->c.qp) in stop_cm()
1757 ib_drain_qp(con->c.qp); in stop_cm()
1762 rdma_destroy_id(con->c.cm_id); in destroy_cm()
1763 con->c.cm_id = NULL; in destroy_cm()
1768 struct rtrs_path *s = con->c.path; in rtrs_rdma_addr_resolved()
1771 mutex_lock(&con->con_mutex); in rtrs_rdma_addr_resolved()
1773 mutex_unlock(&con->con_mutex); in rtrs_rdma_addr_resolved()
1778 err = rdma_resolve_route(con->c.cm_id, RTRS_CONNECT_TIMEOUT_MS); in rtrs_rdma_addr_resolved()
1787 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_rdma_route_resolved()
1788 struct rtrs_clt_sess *clt = clt_path->clt; in rtrs_rdma_route_resolved()
1804 .cid = cpu_to_le16(con->c.cid), in rtrs_rdma_route_resolved()
1805 .cid_num = cpu_to_le16(clt_path->s.con_num), in rtrs_rdma_route_resolved()
1806 .recon_cnt = cpu_to_le16(clt_path->s.recon_cnt), in rtrs_rdma_route_resolved()
1808 msg.first_conn = clt_path->for_new_clt ? FIRST_CONN : 0; in rtrs_rdma_route_resolved()
1809 uuid_copy(&msg.sess_uuid, &clt_path->s.uuid); in rtrs_rdma_route_resolved()
1810 uuid_copy(&msg.paths_uuid, &clt->paths_uuid); in rtrs_rdma_route_resolved()
1812 err = rdma_connect_locked(con->c.cm_id, ¶m); in rtrs_rdma_route_resolved()
1822 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_rdma_conn_established()
1823 struct rtrs_clt_sess *clt = clt_path->clt; in rtrs_rdma_conn_established()
1829 msg = ev->param.conn.private_data; in rtrs_rdma_conn_established()
1830 len = ev->param.conn.private_data_len; in rtrs_rdma_conn_established()
1833 return -ECONNRESET; in rtrs_rdma_conn_established()
1835 if (le16_to_cpu(msg->magic) != RTRS_MAGIC) { in rtrs_rdma_conn_established()
1837 return -ECONNRESET; in rtrs_rdma_conn_established()
1839 version = le16_to_cpu(msg->version); in rtrs_rdma_conn_established()
1843 return -ECONNRESET; in rtrs_rdma_conn_established()
1845 errno = le16_to_cpu(msg->errno); in rtrs_rdma_conn_established()
1849 return -ECONNRESET; in rtrs_rdma_conn_established()
1851 if (con->c.cid == 0) { in rtrs_rdma_conn_established()
1852 queue_depth = le16_to_cpu(msg->queue_depth); in rtrs_rdma_conn_established()
1854 if (clt_path->queue_depth > 0 && queue_depth != clt_path->queue_depth) { in rtrs_rdma_conn_established()
1860 clt_path->reconnect_attempts = -1; in rtrs_rdma_conn_established()
1862 "Disabling auto-reconnect. Trigger a manual reconnect after issue is resolved\n"); in rtrs_rdma_conn_established()
1863 return -ECONNRESET; in rtrs_rdma_conn_established()
1866 if (!clt_path->rbufs) { in rtrs_rdma_conn_established()
1867 clt_path->rbufs = kcalloc(queue_depth, in rtrs_rdma_conn_established()
1868 sizeof(*clt_path->rbufs), in rtrs_rdma_conn_established()
1870 if (!clt_path->rbufs) in rtrs_rdma_conn_established()
1871 return -ENOMEM; in rtrs_rdma_conn_established()
1873 clt_path->queue_depth = queue_depth; in rtrs_rdma_conn_established()
1874 clt_path->s.signal_interval = min_not_zero(queue_depth, in rtrs_rdma_conn_established()
1876 clt_path->max_hdr_size = le32_to_cpu(msg->max_hdr_size); in rtrs_rdma_conn_established()
1877 clt_path->max_io_size = le32_to_cpu(msg->max_io_size); in rtrs_rdma_conn_established()
1878 clt_path->flags = le32_to_cpu(msg->flags); in rtrs_rdma_conn_established()
1879 clt_path->chunk_size = clt_path->max_io_size + clt_path->max_hdr_size; in rtrs_rdma_conn_established()
1884 * higher - client does not care and uses cached minimum. in rtrs_rdma_conn_established()
1889 mutex_lock(&clt->paths_mutex); in rtrs_rdma_conn_established()
1890 clt->queue_depth = clt_path->queue_depth; in rtrs_rdma_conn_established()
1891 clt->max_io_size = min_not_zero(clt_path->max_io_size, in rtrs_rdma_conn_established()
1892 clt->max_io_size); in rtrs_rdma_conn_established()
1893 mutex_unlock(&clt->paths_mutex); in rtrs_rdma_conn_established()
1898 clt_path->hca_port = con->c.cm_id->port_num; in rtrs_rdma_conn_established()
1899 scnprintf(clt_path->hca_name, sizeof(clt_path->hca_name), in rtrs_rdma_conn_established()
1900 clt_path->s.dev->ib_dev->name); in rtrs_rdma_conn_established()
1901 clt_path->s.src_addr = con->c.cm_id->route.addr.src_addr; in rtrs_rdma_conn_established()
1903 clt_path->for_new_clt = 1; in rtrs_rdma_conn_established()
1911 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in flag_success_on_conn()
1913 atomic_inc(&clt_path->connected_cnt); in flag_success_on_conn()
1914 con->cm_err = 1; in flag_success_on_conn()
1920 struct rtrs_path *s = con->c.path; in rtrs_rdma_conn_rejected()
1926 status = ev->status; in rtrs_rdma_conn_rejected()
1927 rej_msg = rdma_reject_msg(con->c.cm_id, status); in rtrs_rdma_conn_rejected()
1928 msg = rdma_consumer_reject_data(con->c.cm_id, ev, &data_len); in rtrs_rdma_conn_rejected()
1931 errno = (int16_t)le16_to_cpu(msg->errno); in rtrs_rdma_conn_rejected()
1932 if (errno == -EBUSY) in rtrs_rdma_conn_rejected()
1945 return -ECONNRESET; in rtrs_rdma_conn_rejected()
1953 queue_work(rtrs_wq, &clt_path->close_work); in rtrs_clt_close_conns()
1955 flush_work(&clt_path->close_work); in rtrs_clt_close_conns()
1960 if (con->cm_err == 1) { in flag_error_on_conn()
1963 clt_path = to_clt_path(con->c.path); in flag_error_on_conn()
1964 if (atomic_dec_and_test(&clt_path->connected_cnt)) in flag_error_on_conn()
1966 wake_up(&clt_path->state_wq); in flag_error_on_conn()
1968 con->cm_err = cm_err; in flag_error_on_conn()
1974 struct rtrs_clt_con *con = cm_id->context; in rtrs_clt_rdma_cm_handler()
1975 struct rtrs_path *s = con->c.path; in rtrs_clt_rdma_cm_handler()
1979 switch (ev->event) { in rtrs_clt_rdma_cm_handler()
1994 wake_up(&clt_path->state_wq); in rtrs_clt_rdma_cm_handler()
2003 cm_err = -ECONNRESET; in rtrs_clt_rdma_cm_handler()
2010 rdma_event_msg(ev->event), ev->status); in rtrs_clt_rdma_cm_handler()
2011 cm_err = -ECONNRESET; in rtrs_clt_rdma_cm_handler()
2016 rdma_event_msg(ev->event), ev->status); in rtrs_clt_rdma_cm_handler()
2017 cm_err = -EHOSTUNREACH; in rtrs_clt_rdma_cm_handler()
2027 rdma_event_msg(ev->event), ev->status); in rtrs_clt_rdma_cm_handler()
2028 cm_err = -ECONNRESET; in rtrs_clt_rdma_cm_handler()
2047 struct rtrs_path *s = con->c.path; in create_cm()
2053 clt_path->s.dst_addr.ss_family == AF_IB ? in create_cm()
2061 con->c.cm_id = cm_id; in create_cm()
2062 con->cm_err = 0; in create_cm()
2069 err = rdma_resolve_addr(cm_id, (struct sockaddr *)&clt_path->s.src_addr, in create_cm()
2070 (struct sockaddr *)&clt_path->s.dst_addr, in create_cm()
2082 clt_path->state_wq, in create_cm()
2083 con->cm_err || clt_path->state != RTRS_CLT_CONNECTING, in create_cm()
2085 if (err == 0 || err == -ERESTARTSYS) { in create_cm()
2087 err = -ETIMEDOUT; in create_cm()
2091 if (con->cm_err < 0) in create_cm()
2092 return con->cm_err; in create_cm()
2093 if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTING) in create_cm()
2095 return -ECONNABORTED; in create_cm()
2102 struct rtrs_clt_sess *clt = clt_path->clt; in rtrs_clt_path_up()
2112 mutex_lock(&clt->paths_ev_mutex); in rtrs_clt_path_up()
2113 up = ++clt->paths_up; in rtrs_clt_path_up()
2119 if (up > MAX_PATHS_NUM && up == MAX_PATHS_NUM + clt->paths_num) in rtrs_clt_path_up()
2120 clt->paths_up = clt->paths_num; in rtrs_clt_path_up()
2122 clt->link_ev(clt->priv, RTRS_CLT_LINK_EV_RECONNECTED); in rtrs_clt_path_up()
2123 mutex_unlock(&clt->paths_ev_mutex); in rtrs_clt_path_up()
2126 clt_path->established = true; in rtrs_clt_path_up()
2127 clt_path->reconnect_attempts = 0; in rtrs_clt_path_up()
2128 clt_path->stats->reconnects.successful_cnt++; in rtrs_clt_path_up()
2133 struct rtrs_clt_sess *clt = clt_path->clt; in rtrs_clt_path_down()
2135 if (!clt_path->established) in rtrs_clt_path_down()
2138 clt_path->established = false; in rtrs_clt_path_down()
2139 mutex_lock(&clt->paths_ev_mutex); in rtrs_clt_path_down()
2140 WARN_ON(!clt->paths_up); in rtrs_clt_path_down()
2141 if (--clt->paths_up == 0) in rtrs_clt_path_down()
2142 clt->link_ev(clt->priv, RTRS_CLT_LINK_EV_DISCONNECTED); in rtrs_clt_path_down()
2143 mutex_unlock(&clt->paths_ev_mutex); in rtrs_clt_path_down()
2151 WARN_ON(READ_ONCE(clt_path->state) == RTRS_CLT_CONNECTED); in rtrs_clt_stop_and_destroy_conns()
2157 mutex_lock(&clt_path->init_mutex); in rtrs_clt_stop_and_destroy_conns()
2158 mutex_unlock(&clt_path->init_mutex); in rtrs_clt_stop_and_destroy_conns()
2166 rtrs_stop_hb(&clt_path->s); in rtrs_clt_stop_and_destroy_conns()
2175 for (cid = 0; cid < clt_path->s.con_num; cid++) { in rtrs_clt_stop_and_destroy_conns()
2176 if (!clt_path->s.con[cid]) in rtrs_clt_stop_and_destroy_conns()
2178 con = to_clt_con(clt_path->s.con[cid]); in rtrs_clt_stop_and_destroy_conns()
2193 wait_event_timeout(clt_path->state_wq, in rtrs_clt_stop_and_destroy_conns()
2194 !atomic_read(&clt_path->connected_cnt), in rtrs_clt_stop_and_destroy_conns()
2197 for (cid = 0; cid < clt_path->s.con_num; cid++) { in rtrs_clt_stop_and_destroy_conns()
2198 if (!clt_path->s.con[cid]) in rtrs_clt_stop_and_destroy_conns()
2200 con = to_clt_con(clt_path->s.con[cid]); in rtrs_clt_stop_and_destroy_conns()
2201 mutex_lock(&con->con_mutex); in rtrs_clt_stop_and_destroy_conns()
2203 mutex_unlock(&con->con_mutex); in rtrs_clt_stop_and_destroy_conns()
2211 struct rtrs_clt_sess *clt = clt_path->clt; in rtrs_clt_remove_path_from_arr()
2216 mutex_lock(&clt->paths_mutex); in rtrs_clt_remove_path_from_arr()
2217 list_del_rcu(&clt_path->s.entry); in rtrs_clt_remove_path_from_arr()
2242 * [!CONNECTED path] clt->paths_num-- in rtrs_clt_remove_path_from_arr()
2244 * load clt->paths_num from 2 to 1 in rtrs_clt_remove_path_from_arr()
2249 * ends, because expression i < clt->paths_num is false. in rtrs_clt_remove_path_from_arr()
2251 clt->paths_num--; in rtrs_clt_remove_path_from_arr()
2258 next = rtrs_clt_get_next_path_or_null(&clt->paths_list, clt_path); in rtrs_clt_remove_path_from_arr()
2268 ppcpu_path = per_cpu_ptr(clt->pcpu_path, cpu); in rtrs_clt_remove_path_from_arr()
2270 lockdep_is_held(&clt->paths_mutex)) != clt_path) in rtrs_clt_remove_path_from_arr()
2296 mutex_unlock(&clt->paths_mutex); in rtrs_clt_remove_path_from_arr()
2301 struct rtrs_clt_sess *clt = clt_path->clt; in rtrs_clt_add_path_to_arr()
2303 mutex_lock(&clt->paths_mutex); in rtrs_clt_add_path_to_arr()
2304 clt->paths_num++; in rtrs_clt_add_path_to_arr()
2306 list_add_tail_rcu(&clt_path->s.entry, &clt->paths_list); in rtrs_clt_add_path_to_arr()
2307 mutex_unlock(&clt->paths_mutex); in rtrs_clt_add_path_to_arr()
2316 cancel_work_sync(&clt_path->err_recovery_work); in rtrs_clt_close_work()
2317 cancel_delayed_work_sync(&clt_path->reconnect_dwork); in rtrs_clt_close_work()
2332 clt_path->s.recon_cnt++; in init_conns()
2335 for (cid = 0; cid < clt_path->s.con_num; cid++) { in init_conns()
2340 err = create_cm(to_clt_con(clt_path->s.con[cid])); in init_conns()
2348 rtrs_start_hb(&clt_path->s); in init_conns()
2357 if (!clt_path->s.con[i]) in init_conns()
2360 con = to_clt_con(clt_path->s.con[i]); in init_conns()
2361 if (con->c.cm_id) { in init_conns()
2363 mutex_lock(&con->con_mutex); in init_conns()
2365 mutex_unlock(&con->con_mutex); in init_conns()
2382 struct rtrs_clt_con *con = to_clt_con(wc->qp->qp_context); in rtrs_clt_info_req_done()
2383 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_clt_info_req_done()
2386 iu = container_of(wc->wr_cqe, struct rtrs_iu, cqe); in rtrs_clt_info_req_done()
2387 rtrs_iu_free(iu, clt_path->s.dev->ib_dev, 1); in rtrs_clt_info_req_done()
2389 if (wc->status != IB_WC_SUCCESS) { in rtrs_clt_info_req_done()
2390 rtrs_err(clt_path->clt, "Path info request send failed: %s\n", in rtrs_clt_info_req_done()
2391 ib_wc_status_msg(wc->status)); in rtrs_clt_info_req_done()
2405 sg_cnt = le16_to_cpu(msg->sg_cnt); in process_info_rsp()
2406 if (!sg_cnt || (clt_path->queue_depth % sg_cnt)) { in process_info_rsp()
2407 rtrs_err(clt_path->clt, in process_info_rsp()
2410 return -EINVAL; in process_info_rsp()
2417 if ((ilog2(sg_cnt - 1) + 1) + (ilog2(clt_path->chunk_size - 1) + 1) > in process_info_rsp()
2419 rtrs_err(clt_path->clt, in process_info_rsp()
2421 MAX_IMM_PAYL_BITS, sg_cnt, clt_path->chunk_size); in process_info_rsp()
2422 return -EINVAL; in process_info_rsp()
2425 for (sgi = 0, i = 0; sgi < sg_cnt && i < clt_path->queue_depth; sgi++) { in process_info_rsp()
2426 const struct rtrs_sg_desc *desc = &msg->desc[sgi]; in process_info_rsp()
2430 addr = le64_to_cpu(desc->addr); in process_info_rsp()
2431 rkey = le32_to_cpu(desc->key); in process_info_rsp()
2432 len = le32_to_cpu(desc->len); in process_info_rsp()
2436 if (!len || (len % clt_path->chunk_size)) { in process_info_rsp()
2437 rtrs_err(clt_path->clt, "Incorrect [%d].len %d\n", in process_info_rsp()
2440 return -EINVAL; in process_info_rsp()
2442 for ( ; len && i < clt_path->queue_depth; i++) { in process_info_rsp()
2443 clt_path->rbufs[i].addr = addr; in process_info_rsp()
2444 clt_path->rbufs[i].rkey = rkey; in process_info_rsp()
2446 len -= clt_path->chunk_size; in process_info_rsp()
2447 addr += clt_path->chunk_size; in process_info_rsp()
2451 if (sgi != sg_cnt || i != clt_path->queue_depth) { in process_info_rsp()
2452 rtrs_err(clt_path->clt, in process_info_rsp()
2454 return -EINVAL; in process_info_rsp()
2456 if (total_len != clt_path->chunk_size * clt_path->queue_depth) { in process_info_rsp()
2457 rtrs_err(clt_path->clt, "Incorrect total_len %d\n", total_len); in process_info_rsp()
2458 return -EINVAL; in process_info_rsp()
2466 struct rtrs_clt_con *con = to_clt_con(wc->qp->qp_context); in rtrs_clt_info_rsp_done()
2467 struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); in rtrs_clt_info_rsp_done()
2476 WARN_ON(con->c.cid); in rtrs_clt_info_rsp_done()
2477 iu = container_of(wc->wr_cqe, struct rtrs_iu, cqe); in rtrs_clt_info_rsp_done()
2478 if (wc->status != IB_WC_SUCCESS) { in rtrs_clt_info_rsp_done()
2479 rtrs_err(clt_path->clt, "Path info response recv failed: %s\n", in rtrs_clt_info_rsp_done()
2480 ib_wc_status_msg(wc->status)); in rtrs_clt_info_rsp_done()
2483 WARN_ON(wc->opcode != IB_WC_RECV); in rtrs_clt_info_rsp_done()
2485 if (wc->byte_len < sizeof(*msg)) { in rtrs_clt_info_rsp_done()
2486 rtrs_err(clt_path->clt, "Path info response is malformed: size %d\n", in rtrs_clt_info_rsp_done()
2487 wc->byte_len); in rtrs_clt_info_rsp_done()
2490 ib_dma_sync_single_for_cpu(clt_path->s.dev->ib_dev, iu->dma_addr, in rtrs_clt_info_rsp_done()
2491 iu->size, DMA_FROM_DEVICE); in rtrs_clt_info_rsp_done()
2492 msg = iu->buf; in rtrs_clt_info_rsp_done()
2493 if (le16_to_cpu(msg->type) != RTRS_MSG_INFO_RSP) { in rtrs_clt_info_rsp_done()
2494 rtrs_err(clt_path->clt, "Path info response is malformed: type %d\n", in rtrs_clt_info_rsp_done()
2495 le16_to_cpu(msg->type)); in rtrs_clt_info_rsp_done()
2499 rx_sz += sizeof(msg->desc[0]) * le16_to_cpu(msg->sg_cnt); in rtrs_clt_info_rsp_done()
2500 if (wc->byte_len < rx_sz) { in rtrs_clt_info_rsp_done()
2501 rtrs_err(clt_path->clt, "Path info response is malformed: size %d\n", in rtrs_clt_info_rsp_done()
2502 wc->byte_len); in rtrs_clt_info_rsp_done()
2517 rtrs_iu_free(iu, clt_path->s.dev->ib_dev, 1); in rtrs_clt_info_rsp_done()
2523 struct rtrs_clt_con *usr_con = to_clt_con(clt_path->s.con[0]); in rtrs_send_path_info()
2530 rx_sz += sizeof(struct rtrs_sg_desc) * clt_path->queue_depth; in rtrs_send_path_info()
2533 clt_path->s.dev->ib_dev, DMA_TO_DEVICE, in rtrs_send_path_info()
2535 rx_iu = rtrs_iu_alloc(1, rx_sz, GFP_KERNEL, clt_path->s.dev->ib_dev, in rtrs_send_path_info()
2538 err = -ENOMEM; in rtrs_send_path_info()
2542 err = rtrs_iu_post_recv(&usr_con->c, rx_iu); in rtrs_send_path_info()
2544 rtrs_err(clt_path->clt, "rtrs_iu_post_recv(), err: %d\n", err); in rtrs_send_path_info()
2549 msg = tx_iu->buf; in rtrs_send_path_info()
2550 msg->type = cpu_to_le16(RTRS_MSG_INFO_REQ); in rtrs_send_path_info()
2551 memcpy(msg->pathname, clt_path->s.sessname, sizeof(msg->pathname)); in rtrs_send_path_info()
2553 ib_dma_sync_single_for_device(clt_path->s.dev->ib_dev, in rtrs_send_path_info()
2554 tx_iu->dma_addr, in rtrs_send_path_info()
2555 tx_iu->size, DMA_TO_DEVICE); in rtrs_send_path_info()
2558 err = rtrs_iu_post_send(&usr_con->c, tx_iu, sizeof(*msg), NULL); in rtrs_send_path_info()
2560 rtrs_err(clt_path->clt, "rtrs_iu_post_send(), err: %d\n", err); in rtrs_send_path_info()
2566 wait_event_interruptible_timeout(clt_path->state_wq, in rtrs_send_path_info()
2567 clt_path->state != RTRS_CLT_CONNECTING, in rtrs_send_path_info()
2570 if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTED) { in rtrs_send_path_info()
2571 if (READ_ONCE(clt_path->state) == RTRS_CLT_CONNECTING_ERR) in rtrs_send_path_info()
2572 err = -ECONNRESET; in rtrs_send_path_info()
2574 err = -ETIMEDOUT; in rtrs_send_path_info()
2579 rtrs_iu_free(tx_iu, clt_path->s.dev->ib_dev, 1); in rtrs_send_path_info()
2581 rtrs_iu_free(rx_iu, clt_path->s.dev->ib_dev, 1); in rtrs_send_path_info()
2591 * init_path() - establishes all path connections and does handshake
2601 .src = &clt_path->s.src_addr, in init_path()
2602 .dst = &clt_path->s.dst_addr, in init_path()
2607 mutex_lock(&clt_path->init_mutex); in init_path()
2610 rtrs_err(clt_path->clt, in init_path()
2612 str, clt_path->hca_name, clt_path->hca_port); in init_path()
2617 rtrs_err(clt_path->clt, in init_path()
2619 err, str, clt_path->hca_name, clt_path->hca_port); in init_path()
2624 mutex_unlock(&clt_path->init_mutex); in init_path()
2637 clt = clt_path->clt; in rtrs_clt_reconnect_work()
2641 if (READ_ONCE(clt_path->state) != RTRS_CLT_RECONNECTING) in rtrs_clt_reconnect_work()
2644 if (clt_path->reconnect_attempts >= clt->max_reconnect_attempts) { in rtrs_clt_reconnect_work()
2649 clt_path->reconnect_attempts++; in rtrs_clt_reconnect_work()
2662 clt_path->stats->reconnects.fail_cnt++; in rtrs_clt_reconnect_work()
2663 queue_work(rtrs_wq, &clt_path->err_recovery_work); in rtrs_clt_reconnect_work()
2672 mutex_destroy(&clt->paths_ev_mutex); in rtrs_clt_dev_release()
2673 mutex_destroy(&clt->paths_mutex); in rtrs_clt_dev_release()
2688 return ERR_PTR(-EINVAL); in alloc_clt()
2690 if (strlen(sessname) >= sizeof(clt->sessname)) in alloc_clt()
2691 return ERR_PTR(-EINVAL); in alloc_clt()
2695 return ERR_PTR(-ENOMEM); in alloc_clt()
2697 clt->pcpu_path = alloc_percpu(typeof(*clt->pcpu_path)); in alloc_clt()
2698 if (!clt->pcpu_path) { in alloc_clt()
2700 return ERR_PTR(-ENOMEM); in alloc_clt()
2703 clt->dev.class = &rtrs_clt_dev_class; in alloc_clt()
2704 clt->dev.release = rtrs_clt_dev_release; in alloc_clt()
2705 uuid_gen(&clt->paths_uuid); in alloc_clt()
2706 INIT_LIST_HEAD_RCU(&clt->paths_list); in alloc_clt()
2707 clt->paths_num = paths_num; in alloc_clt()
2708 clt->paths_up = MAX_PATHS_NUM; in alloc_clt()
2709 clt->port = port; in alloc_clt()
2710 clt->pdu_sz = pdu_sz; in alloc_clt()
2711 clt->max_segments = RTRS_MAX_SEGMENTS; in alloc_clt()
2712 clt->reconnect_delay_sec = reconnect_delay_sec; in alloc_clt()
2713 clt->max_reconnect_attempts = max_reconnect_attempts; in alloc_clt()
2714 clt->priv = priv; in alloc_clt()
2715 clt->link_ev = link_ev; in alloc_clt()
2716 clt->mp_policy = MP_POLICY_MIN_INFLIGHT; in alloc_clt()
2717 strscpy(clt->sessname, sessname, sizeof(clt->sessname)); in alloc_clt()
2718 init_waitqueue_head(&clt->permits_wait); in alloc_clt()
2719 mutex_init(&clt->paths_ev_mutex); in alloc_clt()
2720 mutex_init(&clt->paths_mutex); in alloc_clt()
2721 device_initialize(&clt->dev); in alloc_clt()
2723 err = dev_set_name(&clt->dev, "%s", sessname); in alloc_clt()
2731 dev_set_uevent_suppress(&clt->dev, true); in alloc_clt()
2732 err = device_add(&clt->dev); in alloc_clt()
2736 clt->kobj_paths = kobject_create_and_add("paths", &clt->dev.kobj); in alloc_clt()
2737 if (!clt->kobj_paths) { in alloc_clt()
2738 err = -ENOMEM; in alloc_clt()
2743 kobject_del(clt->kobj_paths); in alloc_clt()
2744 kobject_put(clt->kobj_paths); in alloc_clt()
2747 dev_set_uevent_suppress(&clt->dev, false); in alloc_clt()
2748 kobject_uevent(&clt->dev.kobj, KOBJ_ADD); in alloc_clt()
2752 device_del(&clt->dev); in alloc_clt()
2754 free_percpu(clt->pcpu_path); in alloc_clt()
2755 put_device(&clt->dev); in alloc_clt()
2761 free_percpu(clt->pcpu_path); in free_clt()
2766 device_unregister(&clt->dev); in free_clt()
2770 * rtrs_clt_open() - Open a path to an RTRS server
2779 * up, 0 for * disabled, -1 for forever
2800 err = -EINVAL; in rtrs_clt_open()
2804 clt = alloc_clt(pathname, paths_num, port, pdu_sz, ops->priv, in rtrs_clt_open()
2805 ops->link_ev, in rtrs_clt_open()
2822 clt_path->for_new_clt = 1; in rtrs_clt_open()
2823 list_add_tail_rcu(&clt_path->s.entry, &clt->paths_list); in rtrs_clt_open()
2827 list_del_rcu(&clt_path->s.entry); in rtrs_clt_open()
2829 free_percpu(clt_path->stats->pcpu_stats); in rtrs_clt_open()
2830 kfree(clt_path->stats); in rtrs_clt_open()
2837 list_del_rcu(&clt_path->s.entry); in rtrs_clt_open()
2839 free_percpu(clt_path->stats->pcpu_stats); in rtrs_clt_open()
2840 kfree(clt_path->stats); in rtrs_clt_open()
2852 list_for_each_entry_safe(clt_path, tmp, &clt->paths_list, s.entry) { in rtrs_clt_open()
2855 kobject_put(&clt_path->kobj); in rtrs_clt_open()
2866 * rtrs_clt_close() - Close a path
2877 list_for_each_entry_safe(clt_path, tmp, &clt->paths_list, s.entry) { in rtrs_clt_close()
2880 kobject_put(&clt_path->kobj); in rtrs_clt_close()
2890 int err = -EBUSY; in rtrs_clt_reconnect_from_sysfs()
2897 clt_path->reconnect_attempts = 0; in rtrs_clt_reconnect_from_sysfs()
2899 queue_delayed_work(rtrs_wq, &clt_path->reconnect_dwork, 0); in rtrs_clt_reconnect_from_sysfs()
2907 flush_delayed_work(&clt_path->reconnect_dwork); in rtrs_clt_reconnect_from_sysfs()
2908 err = (READ_ONCE(clt_path->state) == in rtrs_clt_reconnect_from_sysfs()
2909 RTRS_CLT_CONNECTED ? 0 : -ENOTCONN); in rtrs_clt_reconnect_from_sysfs()
2924 * 1. State was changed to DEAD - we were fast and nobody in rtrs_clt_remove_path_from_sysfs()
2927 * 2. State was observed as DEAD - we have someone in parallel in rtrs_clt_remove_path_from_sysfs()
2940 kobject_put(&clt_path->kobj); in rtrs_clt_remove_path_from_sysfs()
2948 clt->max_reconnect_attempts = (unsigned int)value; in rtrs_clt_set_max_reconnect_attempts()
2953 return (int)clt->max_reconnect_attempts; in rtrs_clt_get_max_reconnect_attempts()
2957 * rtrs_clt_request() - Request data transfer to/from server via RDMA.
2989 int err = -ECONNABORTED, i; in rtrs_clt_request()
3008 (clt_path = it.next_path(&it)) && it.i < it.clt->paths_num; it.i++) { in rtrs_clt_request()
3009 if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTED) in rtrs_clt_request()
3012 if (usr_len + hdr_len > clt_path->max_hdr_size) { in rtrs_clt_request()
3013 rtrs_wrn_rl(clt_path->clt, in rtrs_clt_request()
3016 usr_len, hdr_len, clt_path->max_hdr_size); in rtrs_clt_request()
3017 err = -EMSGSIZE; in rtrs_clt_request()
3020 req = rtrs_clt_get_req(clt_path, ops->conf_fn, permit, ops->priv, in rtrs_clt_request()
3028 req->in_use = false; in rtrs_clt_request()
3043 /* If no path, return -1 for block layer not to try again */ in rtrs_clt_rdma_cq_direct()
3044 int cnt = -1; in rtrs_clt_rdma_cq_direct()
3051 (clt_path = it.next_path(&it)) && it.i < it.clt->paths_num; it.i++) { in rtrs_clt_rdma_cq_direct()
3052 if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTED) in rtrs_clt_rdma_cq_direct()
3055 con = clt_path->s.con[index + 1]; in rtrs_clt_rdma_cq_direct()
3056 cnt = ib_process_cq_direct(con->cq, -1); in rtrs_clt_rdma_cq_direct()
3068 * rtrs_clt_query() - queries RTRS session attributes
3073 * -ECOMM no connection to the server
3078 return -ECOMM; in rtrs_clt_query()
3080 attr->queue_depth = clt->queue_depth; in rtrs_clt_query()
3081 attr->max_segments = clt->max_segments; in rtrs_clt_query()
3083 attr->max_io_size = min_t(int, clt->max_io_size, in rtrs_clt_query()
3084 clt->max_segments * SZ_4K); in rtrs_clt_query()
3100 mutex_lock(&clt->paths_mutex); in rtrs_clt_create_path_from_sysfs()
3101 if (clt->paths_num == 0) { in rtrs_clt_create_path_from_sysfs()
3107 clt_path->for_new_clt = 1; in rtrs_clt_create_path_from_sysfs()
3110 mutex_unlock(&clt->paths_mutex); in rtrs_clt_create_path_from_sysfs()
3132 free_percpu(clt_path->stats->pcpu_stats); in rtrs_clt_create_path_from_sysfs()
3133 kfree(clt_path->stats); in rtrs_clt_create_path_from_sysfs()
3141 if (!(dev->ib_dev->attrs.device_cap_flags & in rtrs_clt_ib_dev_init()
3144 return -ENOTSUPP; in rtrs_clt_ib_dev_init()
3161 pr_err("Failed to create rtrs-client dev class\n"); in rtrs_client_init()
3167 return -ENOMEM; in rtrs_client_init()