[fio.git] / server.c

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <syslog.h>
#include <signal.h>

#include "fio.h"
#include "server.h"
#include "crc/crc16.h"

int fio_net_port = 8765;

int exit_backend = 0;

static int server_fd = -1;

int fio_send_data(int sk, const void *p, unsigned int len)
{
	assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU);

	do {
		int ret = send(sk, p, len, 0);

		if (ret > 0) {
			len -= ret;
			if (!len)
				break;
			p += ret;
			continue;
		} else if (!ret)
			break;
		else if (errno == EAGAIN || errno == EINTR)
			continue;
	} while (!exit_backend);

	if (!len)
		return 0;

	return 1;
}

int fio_recv_data(int sk, void *p, unsigned int len)
{
	do {
		int ret = recv(sk, p, len, MSG_WAITALL);

		if (ret > 0) {
			len -= ret;
			if (!len)
				break;
			p += ret;
			continue;
		} else if (!ret)
			break;
		else if (errno == EAGAIN || errno == EINTR)
			continue;
	} while (!exit_backend);

	if (!len)
		return 0;

	return -1;
}

static int verify_convert_cmd(struct fio_net_cmd *cmd)
{
	uint16_t crc;

	cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
	cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);

	crc = crc16(cmd, FIO_NET_CMD_CRC_SZ);
	if (crc != cmd->cmd_crc16) {
		log_err("fio: server bad crc on command (got %x, wanted %x)\n",
				cmd->cmd_crc16, crc);
		return 1;
	}

	cmd->version	= le16_to_cpu(cmd->version);
	cmd->opcode	= le16_to_cpu(cmd->opcode);
	cmd->flags	= le32_to_cpu(cmd->flags);
	cmd->serial	= le64_to_cpu(cmd->serial);
	cmd->pdu_len	= le32_to_cpu(cmd->pdu_len);

	switch (cmd->version) {
	case FIO_SERVER_VER1:
		break;
	default:
		log_err("fio: bad server cmd version %d\n", cmd->version);
		return 1;
	}

	if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
		log_err("fio: command payload too large: %u\n", cmd->pdu_len);
		return 1;
	}

	return 0;
}

/*
 * Read (and defragment, if necessary) incoming commands
 */
struct fio_net_cmd *fio_net_recv_cmd(int sk, int block)
{
	struct fio_net_cmd cmd, *cmdret = NULL;
	size_t cmd_size = 0, pdu_offset = 0;
	uint16_t crc;
	int ret, first = 1;
	void *pdu = NULL;

	do {
		struct pollfd pfd;

		pfd.fd = sk;
		pfd.events = POLLIN;
		ret = 0;
		do {
			int timeo = block ? 100 : 10;

			ret = poll(&pfd, 1, timeo);
			if (ret < 0) {
				if (errno == EINTR)
					break;
				log_err("fio: poll: %s\n", strerror(errno));
				break;
			} else if (!ret) {
				if (!block)
					return NULL;
				continue;
			}

			if (pfd.revents & POLLIN)
				break;
			if (pfd.revents & (POLLERR|POLLHUP)) {
				ret = 1;
				break;
			}
		} while (ret >= 0 && block);

		if (ret < 0)
			break;

		ret = fio_recv_data(sk, &cmd, sizeof(cmd));
		if (ret)
			break;

		/* We have a command, verify it and swap if need be */
		ret = verify_convert_cmd(&cmd);
		if (ret)
			break;

		if (first) {
			/* if this is text, add room for \0 at the end */
			cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
			assert(!cmdret);
		} else
			cmd_size += cmd.pdu_len;

		cmdret = realloc(cmdret, cmd_size);

		if (first)
			memcpy(cmdret, &cmd, sizeof(cmd));
		else
			assert(cmdret->opcode == cmd.opcode);

		if (!cmd.pdu_len)
			break;

		/* There's payload, get it */
		pdu = (void *) cmdret->payload + pdu_offset;
		ret = fio_recv_data(sk, pdu, cmd.pdu_len);
		if (ret)
			break;

		/* Verify payload crc */
		crc = crc16(pdu, cmd.pdu_len);
		if (crc != cmd.pdu_crc16) {
			log_err("fio: server bad crc on payload ");
			log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
			ret = 1;
			break;
		}

		pdu_offset += cmd.pdu_len;
		if (!first)
			cmdret->pdu_len += cmd.pdu_len;
		first = 0;
	} while (cmd.flags & FIO_NET_CMD_F_MORE);

	if (ret) {
		free(cmdret);
		cmdret = NULL;
	} else if (cmdret) {
		/* zero-terminate text input */
		if (cmdret->pdu_len && (cmdret->opcode == FIO_NET_CMD_TEXT ||
		    cmdret->opcode == FIO_NET_CMD_JOB)) {
			char *buf = (char *) cmdret->payload;

			buf[cmdret->pdu_len ] = '\0';
		}
		/* frag flag is internal */
		cmdret->flags &= ~FIO_NET_CMD_F_MORE;
	}

	return cmdret;
}

void fio_net_cmd_crc(struct fio_net_cmd *cmd)
{
	uint32_t pdu_len;

	cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));

	pdu_len = le32_to_cpu(cmd->pdu_len);
	if (pdu_len)
		cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
}

int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size)
{
	struct fio_net_cmd *cmd;
	size_t this_len;
	int ret;

	do {
		this_len = size;
		if (this_len > FIO_SERVER_MAX_PDU)
			this_len = FIO_SERVER_MAX_PDU;

		cmd = malloc(sizeof(*cmd) + this_len);

		fio_init_net_cmd(cmd, opcode, buf, this_len);

		if (this_len < size)
			cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);

		fio_net_cmd_crc(cmd);

		ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
		free(cmd);
		size -= this_len;
		buf += this_len;
	} while (!ret && size);

	return ret;
}

int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t serial)
{
	struct fio_net_cmd cmd = {
		.version	= __cpu_to_le16(FIO_SERVER_VER1),
		.opcode		= cpu_to_le16(opcode),
		.serial		= cpu_to_le64(serial),
	};

	fio_net_cmd_crc(&cmd);

	return fio_send_data(sk, &cmd, sizeof(cmd));
}

static int fio_server_send_quit_cmd(void)
{
	dprint(FD_NET, "server: sending quit\n");
	return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0);
}

static int handle_job_cmd(struct fio_net_cmd *cmd)
{
	char *buf = (char *) cmd->payload;
	int ret;

	if (parse_jobs_ini(buf, 1, 0))
		return -1;

	fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0);

	ret = exec_run();
	fio_server_send_quit_cmd();
	reset_fio_state();
	return ret;
}

static int handle_jobline_cmd(struct fio_net_cmd *cmd)
{
	struct cmd_line_pdu *pdu = (struct cmd_line_pdu *) cmd->payload;
	char *argv[FIO_NET_CMD_JOBLINE_ARGV];
	int ret, i;

	pdu->argc = le16_to_cpu(pdu->argc);

	dprint(FD_NET, "server: %d command line args\n", pdu->argc);

	for (i = 0; i < pdu->argc; i++) {
		argv[i] = (char *) pdu->argv[i];
		dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
	}

	if (parse_cmd_line(pdu->argc, argv))
		return -1;

	fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0);

	ret = exec_run();
	fio_server_send_quit_cmd();
	reset_fio_state();
	return ret;
}

static int handle_probe_cmd(struct fio_net_cmd *cmd)
{
	struct cmd_probe_pdu probe;

	memset(&probe, 0, sizeof(probe));
	gethostname((char *) probe.hostname, sizeof(probe.hostname));
	probe.fio_major = FIO_MAJOR;
	probe.fio_minor = FIO_MINOR;
	probe.fio_patch = FIO_PATCH;

	return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe));
}

static int handle_command(struct fio_net_cmd *cmd)
{
	int ret;

	dprint(FD_NET, "server: got opcode %d\n", cmd->opcode);

	switch (cmd->opcode) {
	case FIO_NET_CMD_QUIT:
		fio_terminate_threads(TERMINATE_ALL);
		return -1;
	case FIO_NET_CMD_EXIT:
		exit_backend = 1;
		return -1;
	case FIO_NET_CMD_JOB:
		ret = handle_job_cmd(cmd);
		break;
	case FIO_NET_CMD_JOBLINE:
		ret = handle_jobline_cmd(cmd);
		break;
	case FIO_NET_CMD_PROBE:
		ret = handle_probe_cmd(cmd);
		break;
	default:
		log_err("fio: unknown opcode: %d\n", cmd->opcode);
		ret = 1;
	}

	return ret;
}

static int handle_connection(int sk, int block)
{
	struct fio_net_cmd *cmd = NULL;
	int ret = 0;

	/* read forever */
	while (!exit_backend) {
		cmd = fio_net_recv_cmd(sk, block);
		if (!cmd) {
			ret = -1;
			break;
		}

		ret = handle_command(cmd);
		if (ret)
			break;

		free(cmd);
		cmd = NULL;
	}

	if (cmd)
		free(cmd);

	return ret;
}

void fio_server_idle_loop(void)
{
	if (server_fd != -1)
		handle_connection(server_fd, 0);
}

static int accept_loop(int listen_sk)
{
	struct sockaddr addr;
	unsigned int len = sizeof(addr);
	struct pollfd pfd;
	int ret, sk, flags, exitval = 0;

	dprint(FD_NET, "server enter accept loop\n");

	flags = fcntl(listen_sk, F_GETFL);
	flags |= O_NONBLOCK;
	fcntl(listen_sk, F_SETFL, flags);
again:
	pfd.fd = listen_sk;
	pfd.events = POLLIN;
	do {
		ret = poll(&pfd, 1, 100);
		if (ret < 0) {
			if (errno == EINTR)
				break;
			log_err("fio: poll: %s\n", strerror(errno));
			goto out;
		} else if (!ret)
			continue;

		if (pfd.revents & POLLIN)
			break;
	} while (!exit_backend);

	if (exit_backend)
		goto out;

	sk = accept(listen_sk, &addr, &len);
	if (sk < 0) {
		log_err("fio: accept: %s\n", strerror(errno));
		return -1;
	}

	dprint(FD_NET, "server got a connection\n");

	server_fd = sk;

	exitval = handle_connection(sk, 1);

	server_fd = -1;
	close(sk);

	if (!exit_backend)
		goto again;

out:
	return exitval;
}

int fio_server_text_output(const char *buf, unsigned int len)
{
	if (server_fd != -1)
		return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len);

	return 0;
}

static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
{
	dst->max_val	= cpu_to_le64(src->max_val);
	dst->min_val	= cpu_to_le64(src->min_val);
	dst->samples	= cpu_to_le64(src->samples);
	/* FIXME */
	dst->mean	= __cpu_to_le64(src->mean);
	dst->S		= __cpu_to_le64(src->S);
}

static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
{
	int i;

	for (i = 0; i < 2; i++) {
		dst->max_run[i]		= cpu_to_le64(src->max_run[i]);
		dst->min_run[i]		= cpu_to_le64(src->min_run[i]);
		dst->max_bw[i]		= cpu_to_le64(src->max_bw[i]);
		dst->min_bw[i]		= cpu_to_le64(src->min_bw[i]);
		dst->io_kb[i]		= cpu_to_le64(src->io_kb[i]);
		dst->agg[i]		= cpu_to_le64(src->agg[i]);
	}

	dst->kb_base	= cpu_to_le32(src->kb_base);
	dst->groupid	= cpu_to_le32(src->groupid);
}

/*
 * Send a CMD_TS, which packs struct thread_stat and group_run_stats
 * into a single payload.
 */
void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs)
{
	struct cmd_ts_pdu p;
	int i, j;

	dprint(FD_NET, "server sending end stats\n");

	memset(&p, 0, sizeof(p));

	strcpy(p.ts.name, ts->name);
	strcpy(p.ts.verror, ts->verror);
	strcpy(p.ts.description, ts->description);

	p.ts.error	= cpu_to_le32(ts->error);
	p.ts.groupid	= cpu_to_le32(ts->groupid);
	p.ts.pid	= cpu_to_le32(ts->pid);
	p.ts.members	= cpu_to_le32(ts->members);

	for (i = 0; i < 2; i++) {
		convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
		convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
		convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
		convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
	}

	p.ts.usr_time		= cpu_to_le64(ts->usr_time);
	p.ts.sys_time		= cpu_to_le64(ts->sys_time);
	p.ts.ctx		= cpu_to_le64(ts->ctx);
	p.ts.minf		= cpu_to_le64(ts->minf);
	p.ts.majf		= cpu_to_le64(ts->majf);
	p.ts.clat_percentiles	= cpu_to_le64(ts->clat_percentiles);
	p.ts.percentile_list	= NULL;

	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
		p.ts.io_u_map[i]	= cpu_to_le32(ts->io_u_map[i]);
		p.ts.io_u_submit[i]	= cpu_to_le32(ts->io_u_submit[i]);
		p.ts.io_u_complete[i]	= cpu_to_le32(ts->io_u_complete[i]);
	}

	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
		p.ts.io_u_lat_u[i]	= cpu_to_le32(ts->io_u_lat_u[i]);
		p.ts.io_u_lat_m[i]	= cpu_to_le32(ts->io_u_lat_m[i]);
	}

	for (i = 0; i < 2; i++)
		for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
			p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);

	for (i = 0; i < 3; i++) {
		p.ts.total_io_u[i]	= cpu_to_le64(ts->total_io_u[i]);
		p.ts.short_io_u[i]	= cpu_to_le64(ts->short_io_u[i]);
	}

	p.ts.total_submit	= cpu_to_le64(ts->total_submit);
	p.ts.total_complete	= cpu_to_le64(ts->total_complete);

	for (i = 0; i < 2; i++) {
		p.ts.io_bytes[i]	= cpu_to_le64(ts->io_bytes[i]);
		p.ts.runtime[i]		= cpu_to_le64(ts->runtime[i]);
	}

	p.ts.total_run_time	= cpu_to_le64(ts->total_run_time);
	p.ts.continue_on_error	= cpu_to_le16(ts->continue_on_error);
	p.ts.total_err_count	= cpu_to_le64(ts->total_err_count);
	p.ts.first_error	= cpu_to_le32(ts->first_error);
	p.ts.kb_base		= cpu_to_le32(ts->kb_base);

	convert_gs(&p.rs, rs);

	fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p));
}

void fio_server_send_gs(struct group_run_stats *rs)
{
	struct group_run_stats gs;

	dprint(FD_NET, "server sending group run stats\n");

	convert_gs(&gs, rs);
	fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs));
}

void fio_server_send_status(void)
{
	struct jobs_eta *je;
	size_t size;
	void *buf;
	int i;

	size = sizeof(*je) + thread_number * sizeof(char);
	buf = malloc(size);
	memset(buf, 0, size);
	je = buf;

	if (!calc_thread_status(je)) {
		free(je);
		return;
	}

	dprint(FD_NET, "server sending status\n");

	je->nr_running		= cpu_to_le32(je->nr_running);
	je->nr_ramp		= cpu_to_le32(je->nr_ramp);
	je->nr_pending		= cpu_to_le32(je->nr_pending);
	je->files_open		= cpu_to_le32(je->files_open);
	je->m_rate		= cpu_to_le32(je->m_rate);
	je->t_rate		= cpu_to_le32(je->t_rate);
	je->m_iops		= cpu_to_le32(je->m_iops);
	je->t_iops		= cpu_to_le32(je->t_iops);

	for (i = 0; i < 2; i++) {
		je->rate[i]	= cpu_to_le32(je->rate[i]);
		je->iops[i]	= cpu_to_le32(je->iops[i]);
	}

	je->elapsed_sec		= cpu_to_le32(je->nr_running);
	je->eta_sec		= cpu_to_le64(je->eta_sec);

	fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, buf, size);
	free(je);
}

int fio_server_log(const char *format, ...)
{
	char buffer[1024];
	va_list args;
	size_t len;

	dprint(FD_NET, "server log\n");

	va_start(args, format);
	len = vsnprintf(buffer, sizeof(buffer), format, args);
	va_end(args);

	return fio_server_text_output(buffer, len);
}

static int fio_server(void)
{
	struct sockaddr_in saddr_in;
	struct sockaddr addr;
	unsigned int len;
	int sk, opt, ret;

	dprint(FD_NET, "starting server\n");

	sk = socket(AF_INET, SOCK_STREAM, 0);
	if (sk < 0) {
		log_err("fio: socket: %s\n", strerror(errno));
		return -1;
	}

	opt = 1;
	if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
		log_err("fio: setsockopt: %s\n", strerror(errno));
		return -1;
	}
#ifdef SO_REUSEPORT
	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
		log_err("fio: setsockopt: %s\n", strerror(errno));
		return -1;
	}
#endif

	saddr_in.sin_family = AF_INET;
	saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
	saddr_in.sin_port = htons(fio_net_port);

	if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
		log_err("fio: bind: %s\n", strerror(errno));
		return -1;
	}

	if (listen(sk, 1) < 0) {
		log_err("fio: listen: %s\n", strerror(errno));
		return -1;
	}

	len = sizeof(addr);
	if (getsockname(sk, &addr, &len) < 0) {
		log_err("fio: getsockname: %s\n", strerror(errno));
		return -1;
	}

	ret = accept_loop(sk);
	close(sk);
	return ret;
}

static void sig_int(int sig)
{
	fio_terminate_threads(TERMINATE_ALL);
	exit_backend = 1;
}

static void server_signal_handler(void)
{
	struct sigaction act;

	memset(&act, 0, sizeof(act));
	act.sa_handler = sig_int;
	act.sa_flags = SA_RESTART;
	sigaction(SIGINT, &act, NULL);

	memset(&act, 0, sizeof(act));
	act.sa_handler = sig_int;
	act.sa_flags = SA_RESTART;
	sigaction(SIGTERM, &act, NULL);
}

int fio_start_server(int daemonize)
{
	pid_t pid;

	server_signal_handler();

	if (!daemonize)
		return fio_server();

	openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
	pid = fork();
	if (pid < 0) {
		syslog(LOG_ERR, "failed server fork");
		return -1;
	} else if (pid)
		exit(0);

	setsid();
	close(STDIN_FILENO);
	close(STDOUT_FILENO);
	close(STDERR_FILENO);
	f_out = NULL;
	f_err = NULL;
	log_syslog = 1;
	return fio_server();
}
Commit	Line	Data
50d16976 JA	1	#include <stdio.h>
50d16976 JA	2	#include <stdlib.h>
142575e6	3	#include <stdarg.h>
50d16976 JA	4	#include <unistd.h>
50d16976 JA	5	#include <limits.h>
50d16976 JA	6	#include <errno.h>
	7	#include <fcntl.h>
	8	#include <sys/poll.h>
50d16976 JA	9	#include <sys/types.h>
50d16976 JA	10	#include <sys/wait.h>
50d16976	11	#include <sys/mman.h>
50d16976 JA	12	#include <netinet/in.h>
	13	#include <arpa/inet.h>
	14	#include <netdb.h>
e46d8091	15	#include <syslog.h>
9e22ecb0	16	#include <signal.h>
50d16976 JA	17
50d16976 JA	18	#include "fio.h"
132159a5	19	#include "server.h"
fcee5ff6	20	#include "crc/crc16.h"
50d16976	21
132159a5	22	int fio_net_port = 8765;
50d16976	23
009b1be4 JA	24	int exit_backend = 0;
009b1be4 JA	25
46c48f1f	26	static int server_fd = -1;
37db14fe	27
132159a5 JA	28	int fio_send_data(int sk, const void *p, unsigned int len)
132159a5 JA	29	{
794d69ca JA	30	assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU);
794d69ca JA	31
132159a5 JA	32	do {
	33	int ret = send(sk, p, len, 0);
	34
	35	if (ret > 0) {
	36	len -= ret;
	37	if (!len)
	38	break;
	39	p += ret;
	40	continue;
	41	} else if (!ret)
	42	break;
	43	else if (errno == EAGAIN \|\| errno == EINTR)
	44	continue;
	45	} while (!exit_backend);
	46
	47	if (!len)
	48	return 0;
	49
	50	return 1;
	51	}
	52
	53	int fio_recv_data(int sk, void *p, unsigned int len)
	54	{
	55	do {
	56	int ret = recv(sk, p, len, MSG_WAITALL);
	57
	58	if (ret > 0) {
	59	len -= ret;
	60	if (!len)
	61	break;
	62	p += ret;
	63	continue;
	64	} else if (!ret)
	65	break;
	66	else if (errno == EAGAIN \|\| errno == EINTR)
	67	continue;
	68	} while (!exit_backend);
	69
	70	if (!len)
	71	return 0;
	72
	73	return -1;
	74	}
	75
	76	static int verify_convert_cmd(struct fio_net_cmd *cmd)
	77	{
fcee5ff6	78	uint16_t crc;
132159a5	79
fcee5ff6 JA	80	cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
fcee5ff6 JA	81	cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
132159a5	82
fcee5ff6 JA	83	crc = crc16(cmd, FIO_NET_CMD_CRC_SZ);
fcee5ff6 JA	84	if (crc != cmd->cmd_crc16) {
132159a5	85	log_err("fio: server bad crc on command (got %x, wanted %x)\n",
fcee5ff6	86	cmd->cmd_crc16, crc);
132159a5 JA	87	return 1;
	88	}
	89
	90	cmd->version = le16_to_cpu(cmd->version);
	91	cmd->opcode = le16_to_cpu(cmd->opcode);
	92	cmd->flags = le32_to_cpu(cmd->flags);
	93	cmd->serial = le64_to_cpu(cmd->serial);
	94	cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
	95
	96	switch (cmd->version) {
	97	case FIO_SERVER_VER1:
	98	break;
	99	default:
	100	log_err("fio: bad server cmd version %d\n", cmd->version);
	101	return 1;
	102	}
	103
	104	if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
	105	log_err("fio: command payload too large: %u\n", cmd->pdu_len);
	106	return 1;
	107	}
	108
	109	return 0;
	110	}
	111
a64e88da JA	112	/*
	113	* Read (and defragment, if necessary) incoming commands
	114	*/
70e0c316	115	struct fio_net_cmd *fio_net_recv_cmd(int sk, int block)
132159a5	116	{
a64e88da JA	117	struct fio_net_cmd cmd, *cmdret = NULL;
a64e88da JA	118	size_t cmd_size = 0, pdu_offset = 0;
fcee5ff6	119	uint16_t crc;
a64e88da JA	120	int ret, first = 1;
a64e88da JA	121	void *pdu = NULL;
132159a5	122
a64e88da	123	do {
cc0df00a JA	124	struct pollfd pfd;
	125
	126	pfd.fd = sk;
	127	pfd.events = POLLIN;
	128	ret = 0;
	129	do {
70e0c316 JA	130	int timeo = block ? 100 : 10;
	131
	132	ret = poll(&pfd, 1, timeo);
cc0df00a	133	if (ret < 0) {
5fc58b05 JA	134	if (errno == EINTR)
5fc58b05 JA	135	break;
cc0df00a JA	136	log_err("fio: poll: %s\n", strerror(errno));
cc0df00a JA	137	break;
70e0c316 JA	138	} else if (!ret) {
	139	if (!block)
	140	return NULL;
cc0df00a	141	continue;
70e0c316	142	}
cc0df00a JA	143
	144	if (pfd.revents & POLLIN)
	145	break;
	146	if (pfd.revents & (POLLERR\|POLLHUP)) {
	147	ret = 1;
	148	break;
	149	}
70e0c316	150	} while (ret >= 0 && block);
cc0df00a JA	151
	152	if (ret < 0)
	153	break;
	154
a64e88da JA	155	ret = fio_recv_data(sk, &cmd, sizeof(cmd));
	156	if (ret)
	157	break;
132159a5	158
a64e88da JA	159	/* We have a command, verify it and swap if need be */
	160	ret = verify_convert_cmd(&cmd);
	161	if (ret)
	162	break;
132159a5	163
0b8f30a5 JA	164	if (first) {
	165	/* if this is text, add room for \0 at the end */
	166	cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
	167	assert(!cmdret);
	168	} else
a64e88da	169	cmd_size += cmd.pdu_len;
132159a5	170
a64e88da	171	cmdret = realloc(cmdret, cmd_size);
132159a5	172
a64e88da JA	173	if (first)
	174	memcpy(cmdret, &cmd, sizeof(cmd));
	175	else
	176	assert(cmdret->opcode == cmd.opcode);
	177
	178	if (!cmd.pdu_len)
	179	break;
	180
	181	/* There's payload, get it */
	182	pdu = (void *) cmdret->payload + pdu_offset;
	183	ret = fio_recv_data(sk, pdu, cmd.pdu_len);
	184	if (ret)
	185	break;
	186
	187	/* Verify payload crc */
	188	crc = crc16(pdu, cmd.pdu_len);
	189	if (crc != cmd.pdu_crc16) {
	190	log_err("fio: server bad crc on payload ");
	191	log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
	192	ret = 1;
	193	break;
	194	}
	195
	196	pdu_offset += cmd.pdu_len;
817f06bb JA	197	if (!first)
817f06bb JA	198	cmdret->pdu_len += cmd.pdu_len;
a64e88da JA	199	first = 0;
a64e88da JA	200	} while (cmd.flags & FIO_NET_CMD_F_MORE);
132159a5	201
a64e88da JA	202	if (ret) {
	203	free(cmdret);
	204	cmdret = NULL;
0b8f30a5 JA	205	} else if (cmdret) {
	206	/* zero-terminate text input */
	207	if (cmdret->pdu_len && (cmdret->opcode == FIO_NET_CMD_TEXT \|\|
	208	cmdret->opcode == FIO_NET_CMD_JOB)) {
	209	char buf = (char ) cmdret->payload;
	210
	211	buf[cmdret->pdu_len ] = '\0';
	212	}
	213	/* frag flag is internal */
a64e88da	214	cmdret->flags &= ~FIO_NET_CMD_F_MORE;
0b8f30a5	215	}
a64e88da JA	216
a64e88da JA	217	return cmdret;
132159a5 JA	218	}
	219
	220	void fio_net_cmd_crc(struct fio_net_cmd *cmd)
	221	{
	222	uint32_t pdu_len;
	223
ddcc0b69	224	cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));
132159a5 JA	225
	226	pdu_len = le32_to_cpu(cmd->pdu_len);
	227	if (pdu_len)
ddcc0b69	228	cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
132159a5 JA	229	}
132159a5 JA	230
a64e88da	231	int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size)
794d69ca JA	232	{
	233	struct fio_net_cmd *cmd;
	234	size_t this_len;
	235	int ret;
	236
	237	do {
	238	this_len = size;
	239	if (this_len > FIO_SERVER_MAX_PDU)
	240	this_len = FIO_SERVER_MAX_PDU;
	241
	242	cmd = malloc(sizeof(*cmd) + this_len);
	243
	244	fio_init_net_cmd(cmd, opcode, buf, this_len);
	245
	246	if (this_len < size)
ddcc0b69	247	cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
794d69ca JA	248
	249	fio_net_cmd_crc(cmd);
	250
	251	ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
	252	free(cmd);
	253	size -= this_len;
	254	buf += this_len;
	255	} while (!ret && size);
	256
	257	return ret;
	258	}
	259
cc0df00a	260	int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t serial)
132159a5 JA	261	{
132159a5 JA	262	struct fio_net_cmd cmd = {
ddcc0b69	263	.version = __cpu_to_le16(FIO_SERVER_VER1),
132159a5	264	.opcode = cpu_to_le16(opcode),
bdab4441	265	.serial = cpu_to_le64(serial),
132159a5 JA	266	};
	267
	268	fio_net_cmd_crc(&cmd);
	269
	270	return fio_send_data(sk, &cmd, sizeof(cmd));
	271	}
	272
9abea48b	273	static int fio_server_send_quit_cmd(void)
437377e1	274	{
46c48f1f	275	dprint(FD_NET, "server: sending quit\n");
cc0df00a	276	return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0);
437377e1 JA	277	}
437377e1 JA	278
0b8f30a5	279	static int handle_job_cmd(struct fio_net_cmd *cmd)
132159a5	280	{
0b8f30a5	281	char buf = (char ) cmd->payload;
a64e88da	282	int ret;
132159a5	283
81179eec JA	284	if (parse_jobs_ini(buf, 1, 0))
	285	return -1;
	286
	287	fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0);
	288
	289	ret = exec_run();
9abea48b	290	fio_server_send_quit_cmd();
81179eec JA	291	reset_fio_state();
	292	return ret;
	293	}
	294
	295	static int handle_jobline_cmd(struct fio_net_cmd *cmd)
	296	{
	297	struct cmd_line_pdu pdu = (struct cmd_line_pdu ) cmd->payload;
	298	char *argv[FIO_NET_CMD_JOBLINE_ARGV];
	299	int ret, i;
	300
	301	pdu->argc = le16_to_cpu(pdu->argc);
	302
39e8e016 JA	303	dprint(FD_NET, "server: %d command line args\n", pdu->argc);
	304
	305	for (i = 0; i < pdu->argc; i++) {
81179eec	306	argv[i] = (char *) pdu->argv[i];
39e8e016 JA	307	dprint(FD_NET, "server: %d: %s\n", i, argv[i]);
39e8e016 JA	308	}
81179eec JA	309
	310	if (parse_cmd_line(pdu->argc, argv))
	311	return -1;
	312
	313	fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_START, 0);
	314
794d69ca	315	ret = exec_run();
9abea48b	316	fio_server_send_quit_cmd();
794d69ca	317	reset_fio_state();
132159a5 JA	318	return ret;
	319	}
	320
c28e8e8c JA	321	static int handle_probe_cmd(struct fio_net_cmd *cmd)
	322	{
	323	struct cmd_probe_pdu probe;
	324
	325	memset(&probe, 0, sizeof(probe));
	326	gethostname((char *) probe.hostname, sizeof(probe.hostname));
81179eec JA	327	probe.fio_major = FIO_MAJOR;
	328	probe.fio_minor = FIO_MINOR;
	329	probe.fio_patch = FIO_PATCH;
c28e8e8c JA	330
	331	return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe));
	332	}
	333
132159a5 JA	334	static int handle_command(struct fio_net_cmd *cmd)
	335	{
	336	int ret;
	337
46c48f1f JA	338	dprint(FD_NET, "server: got opcode %d\n", cmd->opcode);
46c48f1f JA	339
132159a5 JA	340	switch (cmd->opcode) {
132159a5 JA	341	case FIO_NET_CMD_QUIT:
cc0df00a	342	fio_terminate_threads(TERMINATE_ALL);
c28e8e8c	343	return -1;
d7959186	344	case FIO_NET_CMD_EXIT:
132159a5	345	exit_backend = 1;
c28e8e8c	346	return -1;
132159a5	347	case FIO_NET_CMD_JOB:
0b8f30a5	348	ret = handle_job_cmd(cmd);
132159a5	349	break;
81179eec JA	350	case FIO_NET_CMD_JOBLINE:
	351	ret = handle_jobline_cmd(cmd);
	352	break;
c28e8e8c JA	353	case FIO_NET_CMD_PROBE:
	354	ret = handle_probe_cmd(cmd);
	355	break;
132159a5 JA	356	default:
	357	log_err("fio: unknown opcode: %d\n", cmd->opcode);
	358	ret = 1;
	359	}
	360
	361	return ret;
	362	}
	363
70e0c316	364	static int handle_connection(int sk, int block)
132159a5 JA	365	{
	366	struct fio_net_cmd *cmd = NULL;
	367	int ret = 0;
	368
	369	/* read forever */
	370	while (!exit_backend) {
70e0c316	371	cmd = fio_net_recv_cmd(sk, block);
132159a5	372	if (!cmd) {
c28e8e8c	373	ret = -1;
132159a5 JA	374	break;
	375	}
	376
132159a5 JA	377	ret = handle_command(cmd);
	378	if (ret)
	379	break;
	380
	381	free(cmd);
c77a99e7	382	cmd = NULL;
132159a5 JA	383	}
	384
	385	if (cmd)
	386	free(cmd);
	387
	388	return ret;
	389	}
	390
cc0df00a JA	391	void fio_server_idle_loop(void)
	392	{
	393	if (server_fd != -1)
70e0c316	394	handle_connection(server_fd, 0);
cc0df00a JA	395	}
cc0df00a JA	396
50d16976 JA	397	static int accept_loop(int listen_sk)
	398	{
	399	struct sockaddr addr;
	400	unsigned int len = sizeof(addr);
009b1be4	401	struct pollfd pfd;
132159a5	402	int ret, sk, flags, exitval = 0;
50d16976	403
60efd14e JA	404	dprint(FD_NET, "server enter accept loop\n");
60efd14e JA	405
009b1be4 JA	406	flags = fcntl(listen_sk, F_GETFL);
	407	flags \|= O_NONBLOCK;
	408	fcntl(listen_sk, F_SETFL, flags);
50d16976	409	again:
009b1be4 JA	410	pfd.fd = listen_sk;
	411	pfd.events = POLLIN;
	412	do {
	413	ret = poll(&pfd, 1, 100);
	414	if (ret < 0) {
	415	if (errno == EINTR)
	416	break;
fcee5ff6	417	log_err("fio: poll: %s\n", strerror(errno));
009b1be4 JA	418	goto out;
	419	} else if (!ret)
	420	continue;
	421
	422	if (pfd.revents & POLLIN)
	423	break;
	424	} while (!exit_backend);
	425
	426	if (exit_backend)
	427	goto out;
	428
50d16976	429	sk = accept(listen_sk, &addr, &len);
50d16976	430	if (sk < 0) {
690e09ae	431	log_err("fio: accept: %s\n", strerror(errno));
50d16976 JA	432	return -1;
	433	}
	434
46c48f1f JA	435	dprint(FD_NET, "server got a connection\n");
46c48f1f JA	436
37db14fe JA	437	server_fd = sk;
37db14fe JA	438
70e0c316	439	exitval = handle_connection(sk, 1);
50d16976	440
37db14fe	441	server_fd = -1;
50d16976	442	close(sk);
5c341e9a	443
009b1be4	444	if (!exit_backend)
5c341e9a JA	445	goto again;
5c341e9a JA	446
009b1be4	447	out:
132159a5	448	return exitval;
50d16976 JA	449	}
50d16976 JA	450
142575e6	451	int fio_server_text_output(const char *buf, unsigned int len)
37db14fe	452	{
337d75a8 JA	453	if (server_fd != -1)
	454	return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len);
	455
	456	return 0;
142575e6 JA	457	}
142575e6 JA	458
a64e88da JA	459	static void convert_io_stat(struct io_stat dst, struct io_stat src)
	460	{
	461	dst->max_val = cpu_to_le64(src->max_val);
	462	dst->min_val = cpu_to_le64(src->min_val);
	463	dst->samples = cpu_to_le64(src->samples);
	464	/* FIXME */
ddcc0b69 JA	465	dst->mean = __cpu_to_le64(src->mean);
ddcc0b69 JA	466	dst->S = __cpu_to_le64(src->S);
a64e88da JA	467	}
	468
	469	static void convert_gs(struct group_run_stats dst, struct group_run_stats src)
	470	{
	471	int i;
	472
	473	for (i = 0; i < 2; i++) {
	474	dst->max_run[i] = cpu_to_le64(src->max_run[i]);
	475	dst->min_run[i] = cpu_to_le64(src->min_run[i]);
	476	dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
	477	dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
	478	dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
	479	dst->agg[i] = cpu_to_le64(src->agg[i]);
	480	}
	481
	482	dst->kb_base = cpu_to_le32(src->kb_base);
	483	dst->groupid = cpu_to_le32(src->groupid);
	484	}
	485
	486	/*
	487	* Send a CMD_TS, which packs struct thread_stat and group_run_stats
	488	* into a single payload.
	489	*/
	490	void fio_server_send_ts(struct thread_stat ts, struct group_run_stats rs)
	491	{
	492	struct cmd_ts_pdu p;
	493	int i, j;
	494
60efd14e JA	495	dprint(FD_NET, "server sending end stats\n");
60efd14e JA	496
317b3c8b JA	497	memset(&p, 0, sizeof(p));
317b3c8b JA	498
a64e88da JA	499	strcpy(p.ts.name, ts->name);
	500	strcpy(p.ts.verror, ts->verror);
	501	strcpy(p.ts.description, ts->description);
	502
ddcc0b69	503	p.ts.error = cpu_to_le32(ts->error);
a64e88da	504	p.ts.groupid = cpu_to_le32(ts->groupid);
ddcc0b69	505	p.ts.pid = cpu_to_le32(ts->pid);
a64e88da JA	506	p.ts.members = cpu_to_le32(ts->members);
	507
	508	for (i = 0; i < 2; i++) {
	509	convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
	510	convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
	511	convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
	512	convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
	513	}
	514
	515	p.ts.usr_time = cpu_to_le64(ts->usr_time);
	516	p.ts.sys_time = cpu_to_le64(ts->sys_time);
	517	p.ts.ctx = cpu_to_le64(ts->ctx);
	518	p.ts.minf = cpu_to_le64(ts->minf);
	519	p.ts.majf = cpu_to_le64(ts->majf);
	520	p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
	521	p.ts.percentile_list = NULL;
	522
	523	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
	524	p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
	525	p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
	526	p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
	527	}
	528
	529	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
	530	p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
	531	p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
	532	}
	533
	534	for (i = 0; i < 2; i++)
	535	for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
	536	p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
	537
	538	for (i = 0; i < 3; i++) {
	539	p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
93eee04a	540	p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
a64e88da JA	541	}
a64e88da JA	542
93eee04a	543	p.ts.total_submit = cpu_to_le64(ts->total_submit);
a64e88da JA	544	p.ts.total_complete = cpu_to_le64(ts->total_complete);
	545
	546	for (i = 0; i < 2; i++) {
	547	p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
	548	p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
	549	}
	550
	551	p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
	552	p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
	553	p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
ddcc0b69 JA	554	p.ts.first_error = cpu_to_le32(ts->first_error);
ddcc0b69 JA	555	p.ts.kb_base = cpu_to_le32(ts->kb_base);
a64e88da JA	556
	557	convert_gs(&p.rs, rs);
	558
	559	fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p));
	560	}
	561
	562	void fio_server_send_gs(struct group_run_stats *rs)
	563	{
	564	struct group_run_stats gs;
	565
60efd14e JA	566	dprint(FD_NET, "server sending group run stats\n");
60efd14e JA	567
a64e88da JA	568	convert_gs(&gs, rs);
	569	fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs));
	570	}
	571
cf451d1e JA	572	void fio_server_send_status(void)
cf451d1e JA	573	{
1d1f45ae JA	574	struct jobs_eta *je;
	575	size_t size;
	576	void *buf;
cf451d1e JA	577	int i;
cf451d1e JA	578
1d1f45ae JA	579	size = sizeof(je) + thread_number sizeof(char);
	580	buf = malloc(size);
	581	memset(buf, 0, size);
	582	je = buf;
	583
	584	if (!calc_thread_status(je)) {
	585	free(je);
cf451d1e	586	return;
1d1f45ae	587	}
cf451d1e	588
60efd14e JA	589	dprint(FD_NET, "server sending status\n");
60efd14e JA	590
1d1f45ae JA	591	je->nr_running = cpu_to_le32(je->nr_running);
	592	je->nr_ramp = cpu_to_le32(je->nr_ramp);
	593	je->nr_pending = cpu_to_le32(je->nr_pending);
	594	je->files_open = cpu_to_le32(je->files_open);
	595	je->m_rate = cpu_to_le32(je->m_rate);
	596	je->t_rate = cpu_to_le32(je->t_rate);
	597	je->m_iops = cpu_to_le32(je->m_iops);
	598	je->t_iops = cpu_to_le32(je->t_iops);
cf451d1e JA	599
cf451d1e JA	600	for (i = 0; i < 2; i++) {
1d1f45ae JA	601	je->rate[i] = cpu_to_le32(je->rate[i]);
1d1f45ae JA	602	je->iops[i] = cpu_to_le32(je->iops[i]);
cf451d1e JA	603	}
cf451d1e JA	604
1d1f45ae JA	605	je->elapsed_sec = cpu_to_le32(je->nr_running);
1d1f45ae JA	606	je->eta_sec = cpu_to_le64(je->eta_sec);
cf451d1e	607
1d1f45ae JA	608	fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, buf, size);
1d1f45ae JA	609	free(je);
cf451d1e JA	610	}
cf451d1e JA	611
142575e6 JA	612	int fio_server_log(const char *format, ...)
	613	{
	614	char buffer[1024];
	615	va_list args;
82fa6b21	616	size_t len;
142575e6	617
60efd14e JA	618	dprint(FD_NET, "server log\n");
60efd14e JA	619
142575e6	620	va_start(args, format);
82fa6b21	621	len = vsnprintf(buffer, sizeof(buffer), format, args);
142575e6 JA	622	va_end(args);
142575e6 JA	623
82fa6b21	624	return fio_server_text_output(buffer, len);
37db14fe	625	}
e46d8091	626
81179eec JA	627	static int fio_server(void)
	628	{
	629	struct sockaddr_in saddr_in;
	630	struct sockaddr addr;
	631	unsigned int len;
	632	int sk, opt, ret;
	633
	634	dprint(FD_NET, "starting server\n");
	635
	636	sk = socket(AF_INET, SOCK_STREAM, 0);
	637	if (sk < 0) {
	638	log_err("fio: socket: %s\n", strerror(errno));
	639	return -1;
	640	}
	641
	642	opt = 1;
	643	if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
	644	log_err("fio: setsockopt: %s\n", strerror(errno));
	645	return -1;
	646	}
	647	#ifdef SO_REUSEPORT
	648	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
	649	log_err("fio: setsockopt: %s\n", strerror(errno));
	650	return -1;
	651	}
	652	#endif
	653
	654	saddr_in.sin_family = AF_INET;
	655	saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
	656	saddr_in.sin_port = htons(fio_net_port);
	657
	658	if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
	659	log_err("fio: bind: %s\n", strerror(errno));
	660	return -1;
	661	}
	662
	663	if (listen(sk, 1) < 0) {
	664	log_err("fio: listen: %s\n", strerror(errno));
	665	return -1;
	666	}
	667
	668	len = sizeof(addr);
	669	if (getsockname(sk, &addr, &len) < 0) {
	670	log_err("fio: getsockname: %s\n", strerror(errno));
	671	return -1;
	672	}
	673
	674	ret = accept_loop(sk);
	675	close(sk);
	676	return ret;
	677	}
	678
9abea48b JA	679	static void sig_int(int sig)
	680	{
	681	fio_terminate_threads(TERMINATE_ALL);
	682	exit_backend = 1;
	683	}
	684
	685	static void server_signal_handler(void)
	686	{
	687	struct sigaction act;
	688
	689	memset(&act, 0, sizeof(act));
	690	act.sa_handler = sig_int;
	691	act.sa_flags = SA_RESTART;
	692	sigaction(SIGINT, &act, NULL);
	693
	694	memset(&act, 0, sizeof(act));
	695	act.sa_handler = sig_int;
	696	act.sa_flags = SA_RESTART;
	697	sigaction(SIGTERM, &act, NULL);
	698	}
	699
e46d8091 JA	700	int fio_start_server(int daemonize)
	701	{
	702	pid_t pid;
	703
9abea48b JA	704	server_signal_handler();
9abea48b JA	705
e46d8091 JA	706	if (!daemonize)
	707	return fio_server();
	708
	709	openlog("fio", LOG_NDELAY\|LOG_NOWAIT\|LOG_PID, LOG_USER);
	710	pid = fork();
	711	if (pid < 0) {
	712	syslog(LOG_ERR, "failed server fork");
c28e8e8c	713	return -1;
e46d8091 JA	714	} else if (pid)
	715	exit(0);
	716
	717	setsid();
	718	close(STDIN_FILENO);
	719	close(STDOUT_FILENO);
	720	close(STDERR_FILENO);
	721	f_out = NULL;
	722	f_err = NULL;
	723	log_syslog = 1;
	724	return fio_server();
	725	}