Commit 095fef2f authored by JinYu's avatar JinYu Committed by Tomasz Zawadzki
Browse files

nvmf_example: start subsystems 



Change-Id: Ic1aa1ad9c2cbd637fd1b6d5609a36a63f5f8a698
Signed-off-by: default avatarJinYu <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: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
Reviewed-by: default avatarShuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
parent 8d601b07

examples/nvmf/nvmf/nvmf.c

+86 −3
Original line number Diff line number Diff line
@@ -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();

}