65cac5fbe0
Avoid having to look up transports during discovery later. Change-Id: I0207a822f05b02de4798d3e966603c073ea14062 Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-on: https://review.gerrithub.io/377991 Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Ziye Yang <optimistyzy@gmail.com> Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* 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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/*
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* NVMe over Fabrics discovery service
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*/
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#include "spdk/stdinc.h"
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#include "nvmf_internal.h"
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#include "transport.h"
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#include "spdk/string.h"
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#include "spdk/trace.h"
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#include "spdk/nvmf_spec.h"
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#include "spdk_internal/bdev.h"
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#include "spdk_internal/log.h"
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static void
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nvmf_update_discovery_log(struct spdk_nvmf_tgt *tgt)
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{
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uint64_t numrec = 0;
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struct spdk_nvmf_subsystem *subsystem;
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struct spdk_nvmf_listener *listener;
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struct spdk_nvmf_discovery_log_page_entry *entry;
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struct spdk_nvmf_discovery_log_page *disc_log;
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size_t cur_size;
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SPDK_DEBUGLOG(SPDK_TRACE_NVMF, "Generating log page for genctr %" PRIu64 "\n",
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tgt->discovery_genctr);
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cur_size = sizeof(struct spdk_nvmf_discovery_log_page);
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disc_log = calloc(1, cur_size);
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if (disc_log == NULL) {
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SPDK_ERRLOG("Discovery log page memory allocation error\n");
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return;
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}
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TAILQ_FOREACH(subsystem, &tgt->subsystems, entries) {
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if (subsystem->subtype == SPDK_NVMF_SUBTYPE_DISCOVERY) {
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continue;
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}
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for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL;
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listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) {
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size_t new_size = cur_size + sizeof(*entry);
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void *new_log_page = realloc(disc_log, new_size);
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if (new_log_page == NULL) {
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SPDK_ERRLOG("Discovery log page memory allocation error\n");
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break;
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}
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disc_log = new_log_page;
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cur_size = new_size;
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entry = &disc_log->entries[numrec];
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memset(entry, 0, sizeof(*entry));
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entry->portid = numrec;
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entry->cntlid = 0xffff;
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entry->asqsz = tgt->opts.max_queue_depth;
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entry->subtype = subsystem->subtype;
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snprintf(entry->subnqn, sizeof(entry->subnqn), "%s", subsystem->subnqn);
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spdk_nvmf_transport_listener_discover(listener->transport, &listener->trid, entry);
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numrec++;
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}
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}
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disc_log->numrec = numrec;
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disc_log->genctr = tgt->discovery_genctr;
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free(tgt->discovery_log_page);
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tgt->discovery_log_page = disc_log;
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tgt->discovery_log_page_size = cur_size;
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}
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void
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spdk_nvmf_get_discovery_log_page(struct spdk_nvmf_tgt *tgt, void *buffer,
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uint64_t offset, uint32_t length)
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{
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size_t copy_len = 0;
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size_t zero_len = length;
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if (tgt->discovery_log_page == NULL ||
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tgt->discovery_log_page->genctr != tgt->discovery_genctr) {
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nvmf_update_discovery_log(tgt);
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}
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/* Copy the valid part of the discovery log page, if any */
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if (tgt->discovery_log_page && offset < tgt->discovery_log_page_size) {
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copy_len = spdk_min(tgt->discovery_log_page_size - offset, length);
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zero_len -= copy_len;
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memcpy(buffer, (char *)tgt->discovery_log_page + offset, copy_len);
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}
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/* Zero out the rest of the buffer */
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if (zero_len) {
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memset((char *)buffer + copy_len, 0, zero_len);
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}
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/* We should have copied or zeroed every byte of the output buffer. */
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assert(copy_len + zero_len == length);
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}
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