7aba48fe1e
Previously two spdk_events were allocated in spdk_app_start(). Now app allocated spdk_event for function to be called after initialization is complete. Meanwhile subsystem allocates its own spdk_event. Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Change-Id: I4822f76d30cc2f7b95a86a4ffbfc61b80c0a903e Reviewed-on: https://review.gerrithub.io/382673 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
203 lines
5.5 KiB
C
203 lines
5.5 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/log.h"
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#include "spdk_internal/event.h"
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#include "spdk/env.h"
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static TAILQ_HEAD(spdk_subsystem_list, spdk_subsystem) g_subsystems =
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TAILQ_HEAD_INITIALIZER(g_subsystems);
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static TAILQ_HEAD(subsystem_depend, spdk_subsystem_depend) g_depends =
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TAILQ_HEAD_INITIALIZER(g_depends);
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static struct spdk_subsystem *g_next_subsystem;
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static struct spdk_event *g_app_start_event;
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void
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spdk_add_subsystem(struct spdk_subsystem *subsystem)
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{
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TAILQ_INSERT_TAIL(&g_subsystems, subsystem, tailq);
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}
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void
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spdk_add_subsystem_depend(struct spdk_subsystem_depend *depend)
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{
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TAILQ_INSERT_TAIL(&g_depends, depend, tailq);
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}
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static struct spdk_subsystem *
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spdk_subsystem_find(struct spdk_subsystem_list *list, const char *name)
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{
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struct spdk_subsystem *iter;
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TAILQ_FOREACH(iter, list, tailq) {
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if (strcmp(name, iter->name) == 0) {
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return iter;
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}
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}
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return NULL;
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}
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static void
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subsystem_sort(void)
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{
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bool depends_on, depends_on_sorted;
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struct spdk_subsystem *subsystem, *subsystem_tmp;
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struct spdk_subsystem_depend *subsystem_dep;
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struct spdk_subsystem_list subsystems_list = TAILQ_HEAD_INITIALIZER(subsystems_list);
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while (!TAILQ_EMPTY(&g_subsystems)) {
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TAILQ_FOREACH_SAFE(subsystem, &g_subsystems, tailq, subsystem_tmp) {
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depends_on = false;
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TAILQ_FOREACH(subsystem_dep, &g_depends, tailq) {
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if (strcmp(subsystem->name, subsystem_dep->name) == 0) {
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depends_on = true;
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depends_on_sorted = !!spdk_subsystem_find(&subsystems_list, subsystem_dep->depends_on);
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if (depends_on_sorted)
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continue;
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break;
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}
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}
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if (depends_on == false) {
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TAILQ_REMOVE(&g_subsystems, subsystem, tailq);
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TAILQ_INSERT_TAIL(&subsystems_list, subsystem, tailq);
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} else {
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if (depends_on_sorted == true) {
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TAILQ_REMOVE(&g_subsystems, subsystem, tailq);
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TAILQ_INSERT_TAIL(&subsystems_list, subsystem, tailq);
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}
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}
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}
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}
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TAILQ_FOREACH_SAFE(subsystem, &subsystems_list, tailq, subsystem_tmp) {
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TAILQ_REMOVE(&subsystems_list, subsystem, tailq);
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TAILQ_INSERT_TAIL(&g_subsystems, subsystem, tailq);
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}
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}
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void
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spdk_subsystem_init_next(int rc)
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{
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if (rc) {
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spdk_app_stop(rc);
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assert(g_next_subsystem != NULL);
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SPDK_ERRLOG("Init subsystem %s failed\n", g_next_subsystem->name);
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return;
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}
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if (!g_next_subsystem) {
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g_next_subsystem = TAILQ_FIRST(&g_subsystems);
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} else {
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g_next_subsystem = TAILQ_NEXT(g_next_subsystem, tailq);
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}
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if (!g_next_subsystem) {
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spdk_event_call(g_app_start_event);
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return;
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}
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if (g_next_subsystem->init) {
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g_next_subsystem->init();
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} else {
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spdk_subsystem_init_next(0);
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}
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}
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static void
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spdk_subsystem_verify(void *arg1, void *arg2)
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{
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struct spdk_subsystem_depend *dep;
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/* Verify that all dependency name and depends_on subsystems are registered */
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TAILQ_FOREACH(dep, &g_depends, tailq) {
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if (!spdk_subsystem_find(&g_subsystems, dep->name)) {
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SPDK_ERRLOG("subsystem %s is missing\n", dep->name);
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spdk_app_stop(-1);
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return;
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}
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if (!spdk_subsystem_find(&g_subsystems, dep->depends_on)) {
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SPDK_ERRLOG("subsystem %s dependency %s is missing\n",
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dep->name, dep->depends_on);
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spdk_app_stop(-1);
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return;
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}
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}
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subsystem_sort();
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spdk_subsystem_init_next(0);
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}
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void
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spdk_subsystem_init(struct spdk_event *app_start_event)
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{
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struct spdk_event *verify_event;
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g_app_start_event = app_start_event;
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verify_event = spdk_event_allocate(spdk_env_get_current_core(), spdk_subsystem_verify, NULL, NULL);
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spdk_event_call(verify_event);
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}
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void
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spdk_subsystem_fini(void)
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{
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struct spdk_subsystem *cur;
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cur = TAILQ_LAST(&g_subsystems, spdk_subsystem_list);
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while (cur) {
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if (cur->fini) {
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cur->fini();
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}
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cur = TAILQ_PREV(cur, spdk_subsystem_list, tailq);
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}
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}
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void
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spdk_subsystem_config(FILE *fp)
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{
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struct spdk_subsystem *subsystem;
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TAILQ_FOREACH(subsystem, &g_subsystems, tailq) {
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if (subsystem->config)
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subsystem->config(fp);
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}
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}
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