[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 "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)
{
	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 {
			ret = poll(&pfd, 1, 100);
			if (ret < 0) {
				log_err("fio: poll: %s\n", strerror(errno));
				break;
			} else if (!ret)
				continue;

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

		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)
			cmd_size = sizeof(cmd) + cmd.pdu_len;
		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)
		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 send_quit_command(void)
{
	dprint(FD_NET, "server: sending quit\n");
	return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0);
}

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

	parse_jobs_ini(buf, 1, 0);
	ret = exec_run();
	send_quit_command();
	reset_fio_state();
	return ret;
}

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_ACK:
		return 0;
	case FIO_NET_CMD_NAK:
		return 1;
	case FIO_NET_CMD_JOB:
		ret = handle_cur_job(cmd);
		break;
	default:
		log_err("fio: unknown opcode: %d\n", cmd->opcode);
		ret = 1;
	}

	return ret;
}

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

	/* read forever */
	while (!exit_backend) {
		cmd = fio_net_recv_cmd(sk);
		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);
}

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

	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;

	printf("handle\n");

	exitval = handle_connection(sk);

	printf("out, exit %d\n", exitval);

	server_fd = -1;
	close(sk);

	if (!exit_backend)
		goto again;

out:
	return exitval;
}

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;
}

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;

	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->total_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;

	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;
	}

	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;

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

	return fio_server_text_output(buffer, len);
}

int fio_start_server(int daemonize)
{
	pid_t pid;

	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>
50d16976 JA	16
50d16976 JA	17	#include "fio.h"
132159a5	18	#include "server.h"
fcee5ff6	19	#include "crc/crc16.h"
50d16976	20
132159a5	21	int fio_net_port = 8765;
50d16976	22
009b1be4 JA	23	int exit_backend = 0;
009b1be4 JA	24
46c48f1f	25	static int server_fd = -1;
37db14fe	26
132159a5 JA	27	int fio_send_data(int sk, const void *p, unsigned int len)
132159a5 JA	28	{
794d69ca JA	29	assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU);
794d69ca JA	30
132159a5 JA	31	do {
	32	int ret = send(sk, p, len, 0);
	33
	34	if (ret > 0) {
	35	len -= ret;
	36	if (!len)
	37	break;
	38	p += ret;
	39	continue;
	40	} else if (!ret)
	41	break;
	42	else if (errno == EAGAIN \|\| errno == EINTR)
	43	continue;
	44	} while (!exit_backend);
	45
	46	if (!len)
	47	return 0;
	48
	49	return 1;
	50	}
	51
	52	int fio_recv_data(int sk, void *p, unsigned int len)
	53	{
	54	do {
	55	int ret = recv(sk, p, len, MSG_WAITALL);
	56
	57	if (ret > 0) {
	58	len -= ret;
	59	if (!len)
	60	break;
	61	p += ret;
	62	continue;
	63	} else if (!ret)
	64	break;
	65	else if (errno == EAGAIN \|\| errno == EINTR)
	66	continue;
	67	} while (!exit_backend);
	68
	69	if (!len)
	70	return 0;
	71
	72	return -1;
	73	}
	74
	75	static int verify_convert_cmd(struct fio_net_cmd *cmd)
	76	{
fcee5ff6	77	uint16_t crc;
132159a5	78
fcee5ff6 JA	79	cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16);
fcee5ff6 JA	80	cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16);
132159a5	81
fcee5ff6 JA	82	crc = crc16(cmd, FIO_NET_CMD_CRC_SZ);
fcee5ff6 JA	83	if (crc != cmd->cmd_crc16) {
132159a5	84	log_err("fio: server bad crc on command (got %x, wanted %x)\n",
fcee5ff6	85	cmd->cmd_crc16, crc);
132159a5 JA	86	return 1;
	87	}
	88
	89	cmd->version = le16_to_cpu(cmd->version);
	90	cmd->opcode = le16_to_cpu(cmd->opcode);
	91	cmd->flags = le32_to_cpu(cmd->flags);
	92	cmd->serial = le64_to_cpu(cmd->serial);
	93	cmd->pdu_len = le32_to_cpu(cmd->pdu_len);
	94
	95	switch (cmd->version) {
	96	case FIO_SERVER_VER1:
	97	break;
	98	default:
	99	log_err("fio: bad server cmd version %d\n", cmd->version);
	100	return 1;
	101	}
	102
	103	if (cmd->pdu_len > FIO_SERVER_MAX_PDU) {
	104	log_err("fio: command payload too large: %u\n", cmd->pdu_len);
	105	return 1;
	106	}
	107
	108	return 0;
	109	}
	110
a64e88da JA	111	/*
	112	* Read (and defragment, if necessary) incoming commands
	113	*/
	114	struct fio_net_cmd *fio_net_recv_cmd(int sk)
132159a5	115	{
a64e88da JA	116	struct fio_net_cmd cmd, *cmdret = NULL;
a64e88da JA	117	size_t cmd_size = 0, pdu_offset = 0;
fcee5ff6	118	uint16_t crc;
a64e88da JA	119	int ret, first = 1;
a64e88da JA	120	void *pdu = NULL;
132159a5	121
a64e88da	122	do {
cc0df00a JA	123	struct pollfd pfd;
	124
	125	pfd.fd = sk;
	126	pfd.events = POLLIN;
	127	ret = 0;
	128	do {
	129	ret = poll(&pfd, 1, 100);
	130	if (ret < 0) {
	131	log_err("fio: poll: %s\n", strerror(errno));
	132	break;
	133	} else if (!ret)
	134	continue;
	135
	136	if (pfd.revents & POLLIN)
	137	break;
	138	if (pfd.revents & (POLLERR\|POLLHUP)) {
	139	ret = 1;
	140	break;
	141	}
	142	} while (ret >= 0);
	143
	144	if (ret < 0)
	145	break;
	146
a64e88da JA	147	ret = fio_recv_data(sk, &cmd, sizeof(cmd));
	148	if (ret)
	149	break;
132159a5	150
a64e88da JA	151	/* We have a command, verify it and swap if need be */
	152	ret = verify_convert_cmd(&cmd);
	153	if (ret)
	154	break;
132159a5	155
a64e88da JA	156	if (first)
	157	cmd_size = sizeof(cmd) + cmd.pdu_len;
	158	else
	159	cmd_size += cmd.pdu_len;
132159a5	160
a64e88da	161	cmdret = realloc(cmdret, cmd_size);
132159a5	162
a64e88da JA	163	if (first)
	164	memcpy(cmdret, &cmd, sizeof(cmd));
	165	else
	166	assert(cmdret->opcode == cmd.opcode);
	167
	168	if (!cmd.pdu_len)
	169	break;
	170
	171	/* There's payload, get it */
	172	pdu = (void *) cmdret->payload + pdu_offset;
	173	ret = fio_recv_data(sk, pdu, cmd.pdu_len);
	174	if (ret)
	175	break;
	176
	177	/* Verify payload crc */
	178	crc = crc16(pdu, cmd.pdu_len);
	179	if (crc != cmd.pdu_crc16) {
	180	log_err("fio: server bad crc on payload ");
	181	log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
	182	ret = 1;
	183	break;
	184	}
	185
	186	pdu_offset += cmd.pdu_len;
817f06bb JA	187	if (!first)
817f06bb JA	188	cmdret->pdu_len += cmd.pdu_len;
a64e88da JA	189	first = 0;
a64e88da JA	190	} while (cmd.flags & FIO_NET_CMD_F_MORE);
132159a5	191
a64e88da JA	192	if (ret) {
	193	free(cmdret);
	194	cmdret = NULL;
cc0df00a	195	} else if (cmdret)
a64e88da JA	196	cmdret->flags &= ~FIO_NET_CMD_F_MORE;
	197
	198	return cmdret;
132159a5 JA	199	}
	200
	201	void fio_net_cmd_crc(struct fio_net_cmd *cmd)
	202	{
	203	uint32_t pdu_len;
	204
ddcc0b69	205	cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));
132159a5 JA	206
	207	pdu_len = le32_to_cpu(cmd->pdu_len);
	208	if (pdu_len)
ddcc0b69	209	cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
132159a5 JA	210	}
132159a5 JA	211
a64e88da	212	int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size)
794d69ca JA	213	{
	214	struct fio_net_cmd *cmd;
	215	size_t this_len;
	216	int ret;
	217
	218	do {
	219	this_len = size;
	220	if (this_len > FIO_SERVER_MAX_PDU)
	221	this_len = FIO_SERVER_MAX_PDU;
	222
	223	cmd = malloc(sizeof(*cmd) + this_len);
	224
	225	fio_init_net_cmd(cmd, opcode, buf, this_len);
	226
	227	if (this_len < size)
ddcc0b69	228	cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
794d69ca JA	229
	230	fio_net_cmd_crc(cmd);
	231
	232	ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
	233	free(cmd);
	234	size -= this_len;
	235	buf += this_len;
	236	} while (!ret && size);
	237
	238	return ret;
	239	}
	240
cc0df00a	241	int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t serial)
132159a5 JA	242	{
132159a5 JA	243	struct fio_net_cmd cmd = {
ddcc0b69	244	.version = __cpu_to_le16(FIO_SERVER_VER1),
132159a5	245	.opcode = cpu_to_le16(opcode),
bdab4441	246	.serial = cpu_to_le64(serial),
132159a5 JA	247	};
	248
	249	fio_net_cmd_crc(&cmd);
	250
	251	return fio_send_data(sk, &cmd, sizeof(cmd));
	252	}
	253
437377e1 JA	254	static int send_quit_command(void)
437377e1 JA	255	{
46c48f1f	256	dprint(FD_NET, "server: sending quit\n");
cc0df00a	257	return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0);
437377e1 JA	258	}
437377e1 JA	259
794d69ca	260	static int handle_cur_job(struct fio_net_cmd *cmd)
132159a5	261	{
a64e88da JA	262	void *buf = cmd->payload;
a64e88da JA	263	int ret;
132159a5	264
a64e88da	265	parse_jobs_ini(buf, 1, 0);
794d69ca JA	266	ret = exec_run();
	267	send_quit_command();
	268	reset_fio_state();
132159a5 JA	269	return ret;
	270	}
	271
	272	static int handle_command(struct fio_net_cmd *cmd)
	273	{
	274	int ret;
	275
46c48f1f JA	276	dprint(FD_NET, "server: got opcode %d\n", cmd->opcode);
46c48f1f JA	277
132159a5 JA	278	switch (cmd->opcode) {
132159a5 JA	279	case FIO_NET_CMD_QUIT:
cc0df00a	280	fio_terminate_threads(TERMINATE_ALL);
d7959186 JA	281	return 1;
d7959186 JA	282	case FIO_NET_CMD_EXIT:
132159a5 JA	283	exit_backend = 1;
	284	return 1;
	285	case FIO_NET_CMD_ACK:
	286	return 0;
	287	case FIO_NET_CMD_NAK:
	288	return 1;
	289	case FIO_NET_CMD_JOB:
794d69ca	290	ret = handle_cur_job(cmd);
132159a5 JA	291	break;
	292	default:
	293	log_err("fio: unknown opcode: %d\n", cmd->opcode);
	294	ret = 1;
	295	}
	296
	297	return ret;
	298	}
	299
	300	static int handle_connection(int sk)
	301	{
	302	struct fio_net_cmd *cmd = NULL;
	303	int ret = 0;
	304
	305	/* read forever */
	306	while (!exit_backend) {
a64e88da	307	cmd = fio_net_recv_cmd(sk);
132159a5 JA	308	if (!cmd) {
	309	ret = 1;
	310	break;
	311	}
	312
132159a5 JA	313	ret = handle_command(cmd);
	314	if (ret)
	315	break;
	316
	317	free(cmd);
c77a99e7	318	cmd = NULL;
132159a5 JA	319	}
	320
	321	if (cmd)
	322	free(cmd);
	323
	324	return ret;
	325	}
	326
cc0df00a JA	327	void fio_server_idle_loop(void)
	328	{
	329	if (server_fd != -1)
	330	handle_connection(server_fd);
	331	}
	332
50d16976 JA	333	static int accept_loop(int listen_sk)
	334	{
	335	struct sockaddr addr;
	336	unsigned int len = sizeof(addr);
009b1be4	337	struct pollfd pfd;
132159a5	338	int ret, sk, flags, exitval = 0;
50d16976	339
009b1be4 JA	340	flags = fcntl(listen_sk, F_GETFL);
	341	flags \|= O_NONBLOCK;
	342	fcntl(listen_sk, F_SETFL, flags);
50d16976	343	again:
009b1be4 JA	344	pfd.fd = listen_sk;
	345	pfd.events = POLLIN;
	346	do {
	347	ret = poll(&pfd, 1, 100);
	348	if (ret < 0) {
	349	if (errno == EINTR)
	350	break;
fcee5ff6	351	log_err("fio: poll: %s\n", strerror(errno));
009b1be4 JA	352	goto out;
	353	} else if (!ret)
	354	continue;
	355
	356	if (pfd.revents & POLLIN)
	357	break;
	358	} while (!exit_backend);
	359
	360	if (exit_backend)
	361	goto out;
	362
50d16976	363	sk = accept(listen_sk, &addr, &len);
50d16976	364	if (sk < 0) {
690e09ae	365	log_err("fio: accept: %s\n", strerror(errno));
50d16976 JA	366	return -1;
	367	}
	368
46c48f1f JA	369	dprint(FD_NET, "server got a connection\n");
46c48f1f JA	370
37db14fe JA	371	server_fd = sk;
37db14fe JA	372
cc0df00a JA	373	printf("handle\n");
cc0df00a JA	374
132159a5	375	exitval = handle_connection(sk);
50d16976	376
cc0df00a JA	377	printf("out, exit %d\n", exitval);
cc0df00a JA	378
37db14fe	379	server_fd = -1;
50d16976	380	close(sk);
5c341e9a	381
009b1be4	382	if (!exit_backend)
5c341e9a JA	383	goto again;
5c341e9a JA	384
009b1be4	385	out:
132159a5	386	return exitval;
50d16976 JA	387	}
50d16976 JA	388
e46d8091	389	static int fio_server(void)
50d16976 JA	390	{
	391	struct sockaddr_in saddr_in;
	392	struct sockaddr addr;
	393	unsigned int len;
afcf7758	394	int sk, opt, ret;
50d16976	395
46c48f1f JA	396	dprint(FD_NET, "starting server\n");
46c48f1f JA	397
50d16976 JA	398	sk = socket(AF_INET, SOCK_STREAM, 0);
50d16976 JA	399	if (sk < 0) {
690e09ae	400	log_err("fio: socket: %s\n", strerror(errno));
50d16976 JA	401	return -1;
	402	}
	403
	404	opt = 1;
	405	if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
690e09ae	406	log_err("fio: setsockopt: %s\n", strerror(errno));
50d16976 JA	407	return -1;
	408	}
	409	#ifdef SO_REUSEPORT
	410	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
690e09ae	411	log_err("fio: setsockopt: %s\n", strerror(errno));
50d16976 JA	412	return 1;
	413	}
	414	#endif
	415
	416	saddr_in.sin_family = AF_INET;
	417	saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
132159a5	418	saddr_in.sin_port = htons(fio_net_port);
50d16976 JA	419
50d16976 JA	420	if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
690e09ae	421	log_err("fio: bind: %s\n", strerror(errno));
50d16976 JA	422	return -1;
	423	}
	424
	425	if (listen(sk, 1) < 0) {
690e09ae	426	log_err("fio: listen: %s\n", strerror(errno));
50d16976 JA	427	return -1;
	428	}
	429
	430	len = sizeof(addr);
	431	if (getsockname(sk, &addr, &len) < 0) {
690e09ae	432	log_err("fio: getsockname: %s\n", strerror(errno));
50d16976 JA	433	return -1;
	434	}
	435
afcf7758 JA	436	ret = accept_loop(sk);
	437	close(sk);
	438	return ret;
50d16976	439	}
37db14fe	440
142575e6	441	int fio_server_text_output(const char *buf, unsigned int len)
37db14fe	442	{
337d75a8 JA	443	if (server_fd != -1)
	444	return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len);
	445
	446	return 0;
142575e6 JA	447	}
142575e6 JA	448
a64e88da JA	449	static void convert_io_stat(struct io_stat dst, struct io_stat src)
	450	{
	451	dst->max_val = cpu_to_le64(src->max_val);
	452	dst->min_val = cpu_to_le64(src->min_val);
	453	dst->samples = cpu_to_le64(src->samples);
	454	/* FIXME */
ddcc0b69 JA	455	dst->mean = __cpu_to_le64(src->mean);
ddcc0b69 JA	456	dst->S = __cpu_to_le64(src->S);
a64e88da JA	457	}
	458
	459	static void convert_gs(struct group_run_stats dst, struct group_run_stats src)
	460	{
	461	int i;
	462
	463	for (i = 0; i < 2; i++) {
	464	dst->max_run[i] = cpu_to_le64(src->max_run[i]);
	465	dst->min_run[i] = cpu_to_le64(src->min_run[i]);
	466	dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
	467	dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
	468	dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
	469	dst->agg[i] = cpu_to_le64(src->agg[i]);
	470	}
	471
	472	dst->kb_base = cpu_to_le32(src->kb_base);
	473	dst->groupid = cpu_to_le32(src->groupid);
	474	}
	475
	476	/*
	477	* Send a CMD_TS, which packs struct thread_stat and group_run_stats
	478	* into a single payload.
	479	*/
	480	void fio_server_send_ts(struct thread_stat ts, struct group_run_stats rs)
	481	{
	482	struct cmd_ts_pdu p;
	483	int i, j;
	484
	485	strcpy(p.ts.name, ts->name);
	486	strcpy(p.ts.verror, ts->verror);
	487	strcpy(p.ts.description, ts->description);
	488
ddcc0b69	489	p.ts.error = cpu_to_le32(ts->error);
a64e88da	490	p.ts.groupid = cpu_to_le32(ts->groupid);
ddcc0b69	491	p.ts.pid = cpu_to_le32(ts->pid);
a64e88da JA	492	p.ts.members = cpu_to_le32(ts->members);
	493
	494	for (i = 0; i < 2; i++) {
	495	convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
	496	convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
	497	convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
	498	convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
	499	}
	500
	501	p.ts.usr_time = cpu_to_le64(ts->usr_time);
	502	p.ts.sys_time = cpu_to_le64(ts->sys_time);
	503	p.ts.ctx = cpu_to_le64(ts->ctx);
	504	p.ts.minf = cpu_to_le64(ts->minf);
	505	p.ts.majf = cpu_to_le64(ts->majf);
	506	p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
	507	p.ts.percentile_list = NULL;
	508
	509	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
	510	p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
	511	p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
	512	p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
	513	}
	514
	515	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
	516	p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
	517	p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
	518	}
	519
	520	for (i = 0; i < 2; i++)
	521	for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
	522	p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
	523
	524	for (i = 0; i < 3; i++) {
	525	p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
	526	p.ts.short_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
	527	}
	528
	529	p.ts.total_submit = cpu_to_le64(ts->total_submit);
	530	p.ts.total_complete = cpu_to_le64(ts->total_complete);
	531
	532	for (i = 0; i < 2; i++) {
	533	p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
	534	p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
	535	}
	536
	537	p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
	538	p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
	539	p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
ddcc0b69 JA	540	p.ts.first_error = cpu_to_le32(ts->first_error);
ddcc0b69 JA	541	p.ts.kb_base = cpu_to_le32(ts->kb_base);
a64e88da JA	542
	543	convert_gs(&p.rs, rs);
	544
	545	fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p));
	546	}
	547
	548	void fio_server_send_gs(struct group_run_stats *rs)
	549	{
	550	struct group_run_stats gs;
	551
	552	convert_gs(&gs, rs);
	553	fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs));
	554	}
	555
cf451d1e JA	556	void fio_server_send_status(void)
cf451d1e JA	557	{
1d1f45ae JA	558	struct jobs_eta *je;
	559	size_t size;
	560	void *buf;
cf451d1e JA	561	int i;
cf451d1e JA	562
1d1f45ae JA	563	size = sizeof(je) + thread_number sizeof(char);
	564	buf = malloc(size);
	565	memset(buf, 0, size);
	566	je = buf;
	567
	568	if (!calc_thread_status(je)) {
	569	free(je);
cf451d1e	570	return;
1d1f45ae	571	}
cf451d1e	572
1d1f45ae JA	573	je->nr_running = cpu_to_le32(je->nr_running);
	574	je->nr_ramp = cpu_to_le32(je->nr_ramp);
	575	je->nr_pending = cpu_to_le32(je->nr_pending);
	576	je->files_open = cpu_to_le32(je->files_open);
	577	je->m_rate = cpu_to_le32(je->m_rate);
	578	je->t_rate = cpu_to_le32(je->t_rate);
	579	je->m_iops = cpu_to_le32(je->m_iops);
	580	je->t_iops = cpu_to_le32(je->t_iops);
cf451d1e JA	581
cf451d1e JA	582	for (i = 0; i < 2; i++) {
1d1f45ae JA	583	je->rate[i] = cpu_to_le32(je->rate[i]);
1d1f45ae JA	584	je->iops[i] = cpu_to_le32(je->iops[i]);
cf451d1e JA	585	}
cf451d1e JA	586
1d1f45ae JA	587	je->elapsed_sec = cpu_to_le32(je->nr_running);
1d1f45ae JA	588	je->eta_sec = cpu_to_le64(je->eta_sec);
cf451d1e	589
1d1f45ae JA	590	fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, buf, size);
1d1f45ae JA	591	free(je);
cf451d1e JA	592	}
cf451d1e JA	593
142575e6 JA	594	int fio_server_log(const char *format, ...)
	595	{
	596	char buffer[1024];
	597	va_list args;
82fa6b21	598	size_t len;
142575e6 JA	599
142575e6 JA	600	va_start(args, format);
82fa6b21	601	len = vsnprintf(buffer, sizeof(buffer), format, args);
142575e6 JA	602	va_end(args);
142575e6 JA	603
82fa6b21	604	return fio_server_text_output(buffer, len);
37db14fe	605	}
e46d8091 JA	606
	607	int fio_start_server(int daemonize)
	608	{
	609	pid_t pid;
	610
	611	if (!daemonize)
	612	return fio_server();
	613
	614	openlog("fio", LOG_NDELAY\|LOG_NOWAIT\|LOG_PID, LOG_USER);
	615	pid = fork();
	616	if (pid < 0) {
	617	syslog(LOG_ERR, "failed server fork");
	618	return 1;
	619	} else if (pid)
	620	exit(0);
	621
	622	setsid();
	623	close(STDIN_FILENO);
	624	close(STDOUT_FILENO);
	625	close(STDERR_FILENO);
	626	f_out = NULL;
	627	f_err = NULL;
	628	log_syslog = 1;
	629	return fio_server();
	630	}