933bf632d6
This patch adds support for saving VMD subsystem's configuration to a JSON formatted file. It allows saving and then loading configuration with VMD enabled without having to send the `enable_vmd` RPC. Change-Id: I59b380ec1e1f25f60f45d2363724ed7ac78c365c Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/473405 Community-CI: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
131 lines
3.5 KiB
C
131 lines
3.5 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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#include "spdk/stdinc.h"
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#include "spdk/conf.h"
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#include "spdk/thread.h"
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#include "spdk/likely.h"
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#include "spdk/vmd.h"
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#include "spdk_internal/event.h"
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#include "event_vmd.h"
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static struct spdk_poller *g_hotplug_poller;
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static bool g_enabled;
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static int
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vmd_hotplug_monitor(void *ctx)
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{
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return spdk_vmd_hotplug_monitor();
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}
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int
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vmd_subsystem_init(void)
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{
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int rc;
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if (g_enabled) {
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SPDK_ERRLOG("The initialization has already been performed\n");
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return -EBUSY;
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}
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rc = spdk_vmd_init();
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if (spdk_likely(rc != 0)) {
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SPDK_ERRLOG("Failed to initialize the VMD library\n");
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return rc;
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}
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assert(g_hotplug_poller == NULL);
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g_hotplug_poller = spdk_poller_register(vmd_hotplug_monitor, NULL, 1000000ULL);
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if (g_hotplug_poller == NULL) {
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SPDK_ERRLOG("Failed to register hotplug monitor poller\n");
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return -ENOMEM;
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}
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g_enabled = true;
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return 0;
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}
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static void
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spdk_vmd_subsystem_init(void)
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{
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struct spdk_conf_section *sp;
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int rc = 0;
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sp = spdk_conf_find_section(NULL, "Vmd");
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if (sp != NULL) {
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if (spdk_conf_section_get_boolval(sp, "Enable", false)) {
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rc = vmd_subsystem_init();
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}
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}
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spdk_subsystem_init_next(rc);
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}
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static void
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spdk_vmd_subsystem_fini(void)
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{
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spdk_poller_unregister(&g_hotplug_poller);
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spdk_subsystem_fini_next();
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}
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static void
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spdk_vmd_write_config_json(struct spdk_json_write_ctx *w)
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{
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spdk_json_write_array_begin(w);
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if (g_enabled) {
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spdk_json_write_object_begin(w);
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spdk_json_write_named_string(w, "method", "enable_vmd");
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spdk_json_write_named_object_begin(w, "params");
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spdk_json_write_object_end(w);
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spdk_json_write_object_end(w);
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}
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spdk_json_write_array_end(w);
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}
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static struct spdk_subsystem g_spdk_subsystem_vmd = {
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.name = "vmd",
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.init = spdk_vmd_subsystem_init,
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.fini = spdk_vmd_subsystem_fini,
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.config = NULL,
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.write_config_json = spdk_vmd_write_config_json,
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};
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SPDK_SUBSYSTEM_REGISTER(g_spdk_subsystem_vmd);
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