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nvmf_example: start subsystems

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Change-Id: Ic1aa1ad9c2cbd637fd1b6d5609a36a63f5f8a698
Signed-off-by: JinYu <jin.yu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/468659
Community-CI: SPDK CI Jenkins <sys_sgci@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
JinYu 2019-08-26 17:21:54 +08:00 committed by Tomasz Zawadzki
parent 8d601b077f
commit 095fef2f45
1 changed files with 86 additions and 3 deletions
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89
examples/nvmf/nvmf/nvmf.c
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@ -39,6 +39,7 @@
#include "spdk/bdev.h"
#include "spdk/rpc.h"
#include "spdk/nvmf.h"
#include "spdk/likely.h"
#include "spdk_internal/event.h"
@ -50,6 +51,8 @@ enum nvmf_target_state {
NVMF_INIT_SUBSYSTEM = 0,
NVMF_INIT_TARGET,
NVMF_INIT_POLL_GROUPS,
NVMF_INIT_START_SUBSYSTEMS,
NVMF_FINI_STOP_SUBSYSTEMS,
NVMF_FINI_POLL_GROUPS,
NVMF_FINI_TARGET,
NVMF_FINI_SUBSYSTEM,
@ -396,10 +399,84 @@ error:
g_target_state = NVMF_FINI_TARGET;
}
static void
nvmf_tgt_subsystem_stop_next(struct spdk_nvmf_subsystem *subsystem,
void *cb_arg, int status)
{
subsystem = spdk_nvmf_subsystem_get_next(subsystem);
if (subsystem) {
spdk_nvmf_subsystem_stop(subsystem,
nvmf_tgt_subsystem_stop_next,
cb_arg);
return;
}
fprintf(stdout, "all subsystems of target stopped\n");
g_target_state = NVMF_FINI_POLL_GROUPS;
nvmf_target_advance_state();
}
static void
nvmf_tgt_stop_subsystems(struct nvmf_target *nvmf_tgt)
{
struct spdk_nvmf_subsystem *subsystem;
subsystem = spdk_nvmf_subsystem_get_first(nvmf_tgt->tgt);
if (spdk_likely(subsystem)) {
spdk_nvmf_subsystem_stop(subsystem,
nvmf_tgt_subsystem_stop_next,
NULL);
} else {
g_target_state = NVMF_FINI_POLL_GROUPS;
}
}
static void
nvmf_tgt_subsystem_start_next(struct spdk_nvmf_subsystem *subsystem,
void *cb_arg, int status)
{
subsystem = spdk_nvmf_subsystem_get_next(subsystem);
if (subsystem) {
spdk_nvmf_subsystem_start(subsystem, nvmf_tgt_subsystem_start_next,
cb_arg);
return;
}
fprintf(stdout, "all subsystems of target started\n");
}
static void
nvmf_tgt_start_subsystems(struct nvmf_target *nvmf_tgt)
{
struct spdk_nvmf_subsystem *subsystem;
/* Subsystem is the NVM subsystem which is a combine of namespaces
* except the discovery subsystem which is used for discovery service.
* It also controls the hosts that means the subsystem determines whether
* the host can access this subsystem.
*/
subsystem = spdk_nvmf_subsystem_get_first(nvmf_tgt->tgt);
if (spdk_likely(subsystem)) {
/* In SPDK there are three states in subsystem: Inactive, Active, Paused.
* Start subsystem means make it from inactive to active that means
* subsystem start to work or it can be accessed.
*/
spdk_nvmf_subsystem_start(subsystem,
nvmf_tgt_subsystem_start_next,
NULL);
} else {
g_target_state = NVMF_FINI_STOP_SUBSYSTEMS;
}
}
static void
nvmf_tgt_create_poll_groups_done(void *ctx)
{
fprintf(stdout, "create targets's poll groups done\n");
g_target_state = NVMF_INIT_START_SUBSYSTEMS;
nvmf_target_advance_state();
}
static void
@ -526,6 +603,12 @@ nvmf_target_advance_state(void)
case NVMF_INIT_POLL_GROUPS:
nvmf_poll_groups_create();
break;
case NVMF_INIT_START_SUBSYSTEMS:
nvmf_tgt_start_subsystems(&g_nvmf_tgt);
break;
case NVMF_FINI_STOP_SUBSYSTEMS:
nvmf_tgt_stop_subsystems(&g_nvmf_tgt);
break;
case NVMF_FINI_POLL_GROUPS:
nvmf_poll_groups_destroy();
break;
@ -550,15 +633,15 @@ static void
_nvmf_shutdown_cb(void *ctx)
{
/* Still in initialization state, defer shutdown operation */
if (g_target_state < NVMF_INIT_POLL_GROUPS) {
if (g_target_state < NVMF_INIT_START_SUBSYSTEMS) {
spdk_thread_send_msg(spdk_get_thread(), _nvmf_shutdown_cb, NULL);
return;
} else if (g_target_state >= NVMF_FINI_POLL_GROUPS) {
} else if (g_target_state >= NVMF_FINI_STOP_SUBSYSTEMS) {
/* Already in Shutdown status, ignore the signal */
return;
}
g_target_state = NVMF_FINI_POLL_GROUPS;
g_target_state = NVMF_FINI_STOP_SUBSYSTEMS;
nvmf_target_advance_state();
}