numam-spdk/lib/event/subsystem.c
Tomasz Zawadzki 7aba48fe1e subsystem: move allocation of subsystem_init event to subsystem
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>
2017-10-16 15:14:36 -04:00

203 lines
5.5 KiB
C

/*-
* BSD LICENSE
*
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* All rights reserved.
*
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* modification, are permitted provided that the following conditions
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* * Neither the name of Intel Corporation nor the names of its
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* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "spdk/stdinc.h"
#include "spdk/log.h"
#include "spdk_internal/event.h"
#include "spdk/env.h"
static TAILQ_HEAD(spdk_subsystem_list, spdk_subsystem) g_subsystems =
TAILQ_HEAD_INITIALIZER(g_subsystems);
static TAILQ_HEAD(subsystem_depend, spdk_subsystem_depend) g_depends =
TAILQ_HEAD_INITIALIZER(g_depends);
static struct spdk_subsystem *g_next_subsystem;
static struct spdk_event *g_app_start_event;
void
spdk_add_subsystem(struct spdk_subsystem *subsystem)
{
TAILQ_INSERT_TAIL(&g_subsystems, subsystem, tailq);
}
void
spdk_add_subsystem_depend(struct spdk_subsystem_depend *depend)
{
TAILQ_INSERT_TAIL(&g_depends, depend, tailq);
}
static struct spdk_subsystem *
spdk_subsystem_find(struct spdk_subsystem_list *list, const char *name)
{
struct spdk_subsystem *iter;
TAILQ_FOREACH(iter, list, tailq) {
if (strcmp(name, iter->name) == 0) {
return iter;
}
}
return NULL;
}
static void
subsystem_sort(void)
{
bool depends_on, depends_on_sorted;
struct spdk_subsystem *subsystem, *subsystem_tmp;
struct spdk_subsystem_depend *subsystem_dep;
struct spdk_subsystem_list subsystems_list = TAILQ_HEAD_INITIALIZER(subsystems_list);
while (!TAILQ_EMPTY(&g_subsystems)) {
TAILQ_FOREACH_SAFE(subsystem, &g_subsystems, tailq, subsystem_tmp) {
depends_on = false;
TAILQ_FOREACH(subsystem_dep, &g_depends, tailq) {
if (strcmp(subsystem->name, subsystem_dep->name) == 0) {
depends_on = true;
depends_on_sorted = !!spdk_subsystem_find(&subsystems_list, subsystem_dep->depends_on);
if (depends_on_sorted)
continue;
break;
}
}
if (depends_on == false) {
TAILQ_REMOVE(&g_subsystems, subsystem, tailq);
TAILQ_INSERT_TAIL(&subsystems_list, subsystem, tailq);
} else {
if (depends_on_sorted == true) {
TAILQ_REMOVE(&g_subsystems, subsystem, tailq);
TAILQ_INSERT_TAIL(&subsystems_list, subsystem, tailq);
}
}
}
}
TAILQ_FOREACH_SAFE(subsystem, &subsystems_list, tailq, subsystem_tmp) {
TAILQ_REMOVE(&subsystems_list, subsystem, tailq);
TAILQ_INSERT_TAIL(&g_subsystems, subsystem, tailq);
}
}
void
spdk_subsystem_init_next(int rc)
{
if (rc) {
spdk_app_stop(rc);
assert(g_next_subsystem != NULL);
SPDK_ERRLOG("Init subsystem %s failed\n", g_next_subsystem->name);
return;
}
if (!g_next_subsystem) {
g_next_subsystem = TAILQ_FIRST(&g_subsystems);
} else {
g_next_subsystem = TAILQ_NEXT(g_next_subsystem, tailq);
}
if (!g_next_subsystem) {
spdk_event_call(g_app_start_event);
return;
}
if (g_next_subsystem->init) {
g_next_subsystem->init();
} else {
spdk_subsystem_init_next(0);
}
}
static void
spdk_subsystem_verify(void *arg1, void *arg2)
{
struct spdk_subsystem_depend *dep;
/* Verify that all dependency name and depends_on subsystems are registered */
TAILQ_FOREACH(dep, &g_depends, tailq) {
if (!spdk_subsystem_find(&g_subsystems, dep->name)) {
SPDK_ERRLOG("subsystem %s is missing\n", dep->name);
spdk_app_stop(-1);
return;
}
if (!spdk_subsystem_find(&g_subsystems, dep->depends_on)) {
SPDK_ERRLOG("subsystem %s dependency %s is missing\n",
dep->name, dep->depends_on);
spdk_app_stop(-1);
return;
}
}
subsystem_sort();
spdk_subsystem_init_next(0);
}
void
spdk_subsystem_init(struct spdk_event *app_start_event)
{
struct spdk_event *verify_event;
g_app_start_event = app_start_event;
verify_event = spdk_event_allocate(spdk_env_get_current_core(), spdk_subsystem_verify, NULL, NULL);
spdk_event_call(verify_event);
}
void
spdk_subsystem_fini(void)
{
struct spdk_subsystem *cur;
cur = TAILQ_LAST(&g_subsystems, spdk_subsystem_list);
while (cur) {
if (cur->fini) {
cur->fini();
}
cur = TAILQ_PREV(cur, spdk_subsystem_list, tailq);
}
}
void
spdk_subsystem_config(FILE *fp)
{
struct spdk_subsystem *subsystem;
TAILQ_FOREACH(subsystem, &g_subsystems, tailq) {
if (subsystem->config)
subsystem->config(fp);
}
}