/*-
 *   BSD LICENSE
 *
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       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
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "spdk/stdinc.h"

#include "spdk/config.h"
#include "spdk/env.h"
#include "spdk/event.h"
#include "spdk/vhost.h"

#ifdef SPDK_CONFIG_VHOST
#define SPDK_VHOST_OPTS "S:"
#else
#define SPDK_VHOST_OPTS
#endif

static const char *g_pid_path = NULL;
static const char g_spdk_tgt_get_opts_string[] = "f:" SPDK_VHOST_OPTS;

static void
spdk_tgt_usage(void)
{
	printf(" -f <file>                 pidfile save pid to file under given path\n");
#ifdef SPDK_CONFIG_VHOST
	printf(" -S <path>                 directory where to create vhost sockets (default: pwd)\n");
#endif
}

static void
spdk_tgt_save_pid(const char *pid_path)
{
	FILE *pid_file;

	pid_file = fopen(pid_path, "w");
	if (pid_file == NULL) {
		fprintf(stderr, "Couldn't create pid file '%s': %s\n", pid_path, strerror(errno));
		exit(EXIT_FAILURE);
	}

	fprintf(pid_file, "%d\n", getpid());
	fclose(pid_file);
}


static int
spdk_tgt_parse_arg(int ch, char *arg)
{
	switch (ch) {
	case 'f':
		g_pid_path = arg;
		break;
#ifdef SPDK_CONFIG_VHOST
	case 'S':
		spdk_vhost_set_socket_path(arg);
		break;
#endif
	default:
		return -EINVAL;
	}
	return 0;
}

static void
spdk_tgt_started(void *arg1)
{
	if (g_pid_path) {
		spdk_tgt_save_pid(g_pid_path);
	}

	if (getenv("MEMZONE_DUMP") != NULL) {
		spdk_memzone_dump(stdout);
		fflush(stdout);
	}
}

int
main(int argc, char **argv)
{
	struct spdk_app_opts opts = {};
	int rc;

	spdk_app_opts_init(&opts, sizeof(opts));
	opts.name = "spdk_tgt";
	if ((rc = spdk_app_parse_args(argc, argv, &opts, g_spdk_tgt_get_opts_string,
				      NULL, spdk_tgt_parse_arg, spdk_tgt_usage)) !=
	    SPDK_APP_PARSE_ARGS_SUCCESS) {
		return rc;
	}

	rc = spdk_app_start(&opts, spdk_tgt_started, NULL);
	spdk_app_fini();

	return rc;
}