4dba507224
The resources allocated to a queue pair do not need to be directly correlated to the queue size requested by the initiator in NVMe-oF, as long as enough resources are present. The RDMA transport, for instance, does complex pooling of the resources behind the scenes when using a shared receive queue. Simplify the resource allocation for a TCP qpair to just always allocate the max allowed queue size right away. This is a configurable parameter, so system administrators can adjust for their needs. The initiator may then request a queue size less than or equal to that, which will only be enforced by queue depth counting and not impact the actual number of resources allocated on the target. This change relies on the MaxC2HSize being equal to the Maximum Data Transfer Size (MDTS) reported. That is the default configuration, but MDTS is configurable. Changing the MDTS with this patch to a value larger than 128k will cause the target to break. This is addressed in the next patch in this series. Change-Id: Ibd4723785c6a4d8d444f9b7bbfa89f98de2320f5 Signed-off-by: Ben Walker <benjamin.walker@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/479733 Community-CI: SPDK CI Jenkins <sys_sgci@intel.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Alexey Marchuk <alexeymar@mellanox.com>
97 lines
3.9 KiB
C
97 lines
3.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation. All rights reserved.
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* Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SPDK_NVMF_TRANSPORT_H
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#define SPDK_NVMF_TRANSPORT_H
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#include "spdk/stdinc.h"
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#include "spdk/nvme.h"
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#include "spdk/nvmf.h"
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struct spdk_nvmf_transport {
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struct spdk_nvmf_tgt *tgt;
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const struct spdk_nvmf_transport_ops *ops;
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struct spdk_nvmf_transport_opts opts;
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/* A mempool for transport related data transfers */
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struct spdk_mempool *data_buf_pool;
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TAILQ_ENTRY(spdk_nvmf_transport) link;
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};
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int spdk_nvmf_transport_stop_listen(struct spdk_nvmf_transport *transport,
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const struct spdk_nvme_transport_id *trid);
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void spdk_nvmf_transport_accept(struct spdk_nvmf_transport *transport, new_qpair_fn cb_fn,
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void *cb_arg);
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void spdk_nvmf_transport_listener_discover(struct spdk_nvmf_transport *transport,
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struct spdk_nvme_transport_id *trid,
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struct spdk_nvmf_discovery_log_page_entry *entry);
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struct spdk_nvmf_transport_poll_group *spdk_nvmf_transport_poll_group_create(
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struct spdk_nvmf_transport *transport);
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struct spdk_nvmf_transport_poll_group *spdk_nvmf_transport_get_optimal_poll_group(
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struct spdk_nvmf_transport *transport, struct spdk_nvmf_qpair *qpair);
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void spdk_nvmf_transport_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group);
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int spdk_nvmf_transport_poll_group_add(struct spdk_nvmf_transport_poll_group *group,
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struct spdk_nvmf_qpair *qpair);
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int spdk_nvmf_transport_poll_group_remove(struct spdk_nvmf_transport_poll_group *group,
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struct spdk_nvmf_qpair *qpair);
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int spdk_nvmf_transport_poll_group_poll(struct spdk_nvmf_transport_poll_group *group);
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int spdk_nvmf_transport_req_free(struct spdk_nvmf_request *req);
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int spdk_nvmf_transport_req_complete(struct spdk_nvmf_request *req);
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void spdk_nvmf_transport_qpair_fini(struct spdk_nvmf_qpair *qpair);
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int spdk_nvmf_transport_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
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struct spdk_nvme_transport_id *trid);
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int spdk_nvmf_transport_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
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struct spdk_nvme_transport_id *trid);
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int spdk_nvmf_transport_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
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struct spdk_nvme_transport_id *trid);
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bool spdk_nvmf_transport_opts_init(const char *transport_name,
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struct spdk_nvmf_transport_opts *opts);
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#endif /* SPDK_NVMF_TRANSPORT_H */
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