[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, 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 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_job_cmd(struct fio_net_cmd *cmd)
{
	char *buf = (char *) cmd->payload;
	int ret;

	parse_jobs_ini(buf, 1, 0);
	ret = exec_run();
	send_quit_command();
	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 = 1;
	probe.fio_minor = 58;
	probe.fio_patch = 0;

	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_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;

	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;
}

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;

	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;

	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	*/
70e0c316	114	struct fio_net_cmd *fio_net_recv_cmd(int sk, int block)
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 {
70e0c316 JA	129	int timeo = block ? 100 : 10;
	130
	131	ret = poll(&pfd, 1, timeo);
cc0df00a	132	if (ret < 0) {
5fc58b05 JA	133	if (errno == EINTR)
5fc58b05 JA	134	break;
cc0df00a JA	135	log_err("fio: poll: %s\n", strerror(errno));
cc0df00a JA	136	break;
70e0c316 JA	137	} else if (!ret) {
	138	if (!block)
	139	return NULL;
cc0df00a	140	continue;
70e0c316	141	}
cc0df00a JA	142
	143	if (pfd.revents & POLLIN)
	144	break;
	145	if (pfd.revents & (POLLERR\|POLLHUP)) {
	146	ret = 1;
	147	break;
	148	}
70e0c316	149	} while (ret >= 0 && block);
cc0df00a JA	150
	151	if (ret < 0)
	152	break;
	153
a64e88da JA	154	ret = fio_recv_data(sk, &cmd, sizeof(cmd));
	155	if (ret)
	156	break;
132159a5	157
a64e88da JA	158	/* We have a command, verify it and swap if need be */
	159	ret = verify_convert_cmd(&cmd);
	160	if (ret)
	161	break;
132159a5	162
0b8f30a5 JA	163	if (first) {
	164	/* if this is text, add room for \0 at the end */
	165	cmd_size = sizeof(cmd) + cmd.pdu_len + 1;
	166	assert(!cmdret);
	167	} else
a64e88da	168	cmd_size += cmd.pdu_len;
132159a5	169
a64e88da	170	cmdret = realloc(cmdret, cmd_size);
132159a5	171
a64e88da JA	172	if (first)
	173	memcpy(cmdret, &cmd, sizeof(cmd));
	174	else
	175	assert(cmdret->opcode == cmd.opcode);
	176
	177	if (!cmd.pdu_len)
	178	break;
	179
	180	/* There's payload, get it */
	181	pdu = (void *) cmdret->payload + pdu_offset;
	182	ret = fio_recv_data(sk, pdu, cmd.pdu_len);
	183	if (ret)
	184	break;
	185
	186	/* Verify payload crc */
	187	crc = crc16(pdu, cmd.pdu_len);
	188	if (crc != cmd.pdu_crc16) {
	189	log_err("fio: server bad crc on payload ");
	190	log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc);
	191	ret = 1;
	192	break;
	193	}
	194
	195	pdu_offset += cmd.pdu_len;
817f06bb JA	196	if (!first)
817f06bb JA	197	cmdret->pdu_len += cmd.pdu_len;
a64e88da JA	198	first = 0;
a64e88da JA	199	} while (cmd.flags & FIO_NET_CMD_F_MORE);
132159a5	200
a64e88da JA	201	if (ret) {
	202	free(cmdret);
	203	cmdret = NULL;
0b8f30a5 JA	204	} else if (cmdret) {
	205	/* zero-terminate text input */
	206	if (cmdret->pdu_len && (cmdret->opcode == FIO_NET_CMD_TEXT \|\|
	207	cmdret->opcode == FIO_NET_CMD_JOB)) {
	208	char buf = (char ) cmdret->payload;
	209
	210	buf[cmdret->pdu_len ] = '\0';
	211	}
	212	/* frag flag is internal */
a64e88da	213	cmdret->flags &= ~FIO_NET_CMD_F_MORE;
0b8f30a5	214	}
a64e88da JA	215
a64e88da JA	216	return cmdret;
132159a5 JA	217	}
	218
	219	void fio_net_cmd_crc(struct fio_net_cmd *cmd)
	220	{
	221	uint32_t pdu_len;
	222
ddcc0b69	223	cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ));
132159a5 JA	224
	225	pdu_len = le32_to_cpu(cmd->pdu_len);
	226	if (pdu_len)
ddcc0b69	227	cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len));
132159a5 JA	228	}
132159a5 JA	229
a64e88da	230	int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size)
794d69ca JA	231	{
	232	struct fio_net_cmd *cmd;
	233	size_t this_len;
	234	int ret;
	235
	236	do {
	237	this_len = size;
	238	if (this_len > FIO_SERVER_MAX_PDU)
	239	this_len = FIO_SERVER_MAX_PDU;
	240
	241	cmd = malloc(sizeof(*cmd) + this_len);
	242
	243	fio_init_net_cmd(cmd, opcode, buf, this_len);
	244
	245	if (this_len < size)
ddcc0b69	246	cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE);
794d69ca JA	247
	248	fio_net_cmd_crc(cmd);
	249
	250	ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len);
	251	free(cmd);
	252	size -= this_len;
	253	buf += this_len;
	254	} while (!ret && size);
	255
	256	return ret;
	257	}
	258
cc0df00a	259	int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t serial)
132159a5 JA	260	{
132159a5 JA	261	struct fio_net_cmd cmd = {
ddcc0b69	262	.version = __cpu_to_le16(FIO_SERVER_VER1),
132159a5	263	.opcode = cpu_to_le16(opcode),
bdab4441	264	.serial = cpu_to_le64(serial),
132159a5 JA	265	};
	266
	267	fio_net_cmd_crc(&cmd);
	268
	269	return fio_send_data(sk, &cmd, sizeof(cmd));
	270	}
	271
437377e1 JA	272	static int send_quit_command(void)
437377e1 JA	273	{
46c48f1f	274	dprint(FD_NET, "server: sending quit\n");
cc0df00a	275	return fio_net_send_simple_cmd(server_fd, FIO_NET_CMD_QUIT, 0);
437377e1 JA	276	}
437377e1 JA	277
0b8f30a5	278	static int handle_job_cmd(struct fio_net_cmd *cmd)
132159a5	279	{
0b8f30a5	280	char buf = (char ) cmd->payload;
a64e88da	281	int ret;
132159a5	282
a64e88da	283	parse_jobs_ini(buf, 1, 0);
794d69ca JA	284	ret = exec_run();
	285	send_quit_command();
	286	reset_fio_state();
132159a5 JA	287	return ret;
	288	}
	289
c28e8e8c JA	290	static int handle_probe_cmd(struct fio_net_cmd *cmd)
	291	{
	292	struct cmd_probe_pdu probe;
	293
	294	memset(&probe, 0, sizeof(probe));
	295	gethostname((char *) probe.hostname, sizeof(probe.hostname));
	296	probe.fio_major = 1;
	297	probe.fio_minor = 58;
	298	probe.fio_patch = 0;
	299
	300	return fio_net_send_cmd(server_fd, FIO_NET_CMD_PROBE, &probe, sizeof(probe));
	301	}
	302
132159a5 JA	303	static int handle_command(struct fio_net_cmd *cmd)
	304	{
	305	int ret;
	306
46c48f1f JA	307	dprint(FD_NET, "server: got opcode %d\n", cmd->opcode);
46c48f1f JA	308
132159a5 JA	309	switch (cmd->opcode) {
132159a5 JA	310	case FIO_NET_CMD_QUIT:
cc0df00a	311	fio_terminate_threads(TERMINATE_ALL);
c28e8e8c	312	return -1;
d7959186	313	case FIO_NET_CMD_EXIT:
132159a5	314	exit_backend = 1;
c28e8e8c	315	return -1;
132159a5	316	case FIO_NET_CMD_JOB:
0b8f30a5	317	ret = handle_job_cmd(cmd);
132159a5	318	break;
c28e8e8c JA	319	case FIO_NET_CMD_PROBE:
	320	ret = handle_probe_cmd(cmd);
	321	break;
132159a5 JA	322	default:
	323	log_err("fio: unknown opcode: %d\n", cmd->opcode);
	324	ret = 1;
	325	}
	326
	327	return ret;
	328	}
	329
70e0c316	330	static int handle_connection(int sk, int block)
132159a5 JA	331	{
	332	struct fio_net_cmd *cmd = NULL;
	333	int ret = 0;
	334
	335	/* read forever */
	336	while (!exit_backend) {
70e0c316	337	cmd = fio_net_recv_cmd(sk, block);
132159a5	338	if (!cmd) {
c28e8e8c	339	ret = -1;
132159a5 JA	340	break;
	341	}
	342
132159a5 JA	343	ret = handle_command(cmd);
	344	if (ret)
	345	break;
	346
	347	free(cmd);
c77a99e7	348	cmd = NULL;
132159a5 JA	349	}
	350
	351	if (cmd)
	352	free(cmd);
	353
	354	return ret;
	355	}
	356
cc0df00a JA	357	void fio_server_idle_loop(void)
	358	{
	359	if (server_fd != -1)
70e0c316	360	handle_connection(server_fd, 0);
cc0df00a JA	361	}
cc0df00a JA	362
50d16976 JA	363	static int accept_loop(int listen_sk)
	364	{
	365	struct sockaddr addr;
	366	unsigned int len = sizeof(addr);
009b1be4	367	struct pollfd pfd;
132159a5	368	int ret, sk, flags, exitval = 0;
50d16976	369
009b1be4 JA	370	flags = fcntl(listen_sk, F_GETFL);
	371	flags \|= O_NONBLOCK;
	372	fcntl(listen_sk, F_SETFL, flags);
50d16976	373	again:
009b1be4 JA	374	pfd.fd = listen_sk;
	375	pfd.events = POLLIN;
	376	do {
	377	ret = poll(&pfd, 1, 100);
	378	if (ret < 0) {
	379	if (errno == EINTR)
	380	break;
fcee5ff6	381	log_err("fio: poll: %s\n", strerror(errno));
009b1be4 JA	382	goto out;
	383	} else if (!ret)
	384	continue;
	385
	386	if (pfd.revents & POLLIN)
	387	break;
	388	} while (!exit_backend);
	389
	390	if (exit_backend)
	391	goto out;
	392
50d16976	393	sk = accept(listen_sk, &addr, &len);
50d16976	394	if (sk < 0) {
690e09ae	395	log_err("fio: accept: %s\n", strerror(errno));
50d16976 JA	396	return -1;
	397	}
	398
46c48f1f JA	399	dprint(FD_NET, "server got a connection\n");
46c48f1f JA	400
37db14fe JA	401	server_fd = sk;
37db14fe JA	402
70e0c316	403	exitval = handle_connection(sk, 1);
50d16976	404
37db14fe	405	server_fd = -1;
50d16976	406	close(sk);
5c341e9a	407
009b1be4	408	if (!exit_backend)
5c341e9a JA	409	goto again;
5c341e9a JA	410
009b1be4	411	out:
132159a5	412	return exitval;
50d16976 JA	413	}
50d16976 JA	414
e46d8091	415	static int fio_server(void)
50d16976 JA	416	{
	417	struct sockaddr_in saddr_in;
	418	struct sockaddr addr;
	419	unsigned int len;
afcf7758	420	int sk, opt, ret;
50d16976	421
46c48f1f JA	422	dprint(FD_NET, "starting server\n");
46c48f1f JA	423
50d16976 JA	424	sk = socket(AF_INET, SOCK_STREAM, 0);
50d16976 JA	425	if (sk < 0) {
690e09ae	426	log_err("fio: socket: %s\n", strerror(errno));
50d16976 JA	427	return -1;
	428	}
	429
	430	opt = 1;
	431	if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
690e09ae	432	log_err("fio: setsockopt: %s\n", strerror(errno));
50d16976 JA	433	return -1;
	434	}
	435	#ifdef SO_REUSEPORT
	436	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
690e09ae	437	log_err("fio: setsockopt: %s\n", strerror(errno));
c28e8e8c	438	return -1;
50d16976 JA	439	}
	440	#endif
	441
	442	saddr_in.sin_family = AF_INET;
	443	saddr_in.sin_addr.s_addr = htonl(INADDR_ANY);
132159a5	444	saddr_in.sin_port = htons(fio_net_port);
50d16976 JA	445
50d16976 JA	446	if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) {
690e09ae	447	log_err("fio: bind: %s\n", strerror(errno));
50d16976 JA	448	return -1;
	449	}
	450
	451	if (listen(sk, 1) < 0) {
690e09ae	452	log_err("fio: listen: %s\n", strerror(errno));
50d16976 JA	453	return -1;
	454	}
	455
	456	len = sizeof(addr);
	457	if (getsockname(sk, &addr, &len) < 0) {
690e09ae	458	log_err("fio: getsockname: %s\n", strerror(errno));
50d16976 JA	459	return -1;
	460	}
	461
afcf7758 JA	462	ret = accept_loop(sk);
	463	close(sk);
	464	return ret;
50d16976	465	}
37db14fe	466
142575e6	467	int fio_server_text_output(const char *buf, unsigned int len)
37db14fe	468	{
337d75a8 JA	469	if (server_fd != -1)
	470	return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len);
	471
	472	return 0;
142575e6 JA	473	}
142575e6 JA	474
a64e88da JA	475	static void convert_io_stat(struct io_stat dst, struct io_stat src)
	476	{
	477	dst->max_val = cpu_to_le64(src->max_val);
	478	dst->min_val = cpu_to_le64(src->min_val);
	479	dst->samples = cpu_to_le64(src->samples);
	480	/* FIXME */
ddcc0b69 JA	481	dst->mean = __cpu_to_le64(src->mean);
ddcc0b69 JA	482	dst->S = __cpu_to_le64(src->S);
a64e88da JA	483	}
	484
	485	static void convert_gs(struct group_run_stats dst, struct group_run_stats src)
	486	{
	487	int i;
	488
	489	for (i = 0; i < 2; i++) {
	490	dst->max_run[i] = cpu_to_le64(src->max_run[i]);
	491	dst->min_run[i] = cpu_to_le64(src->min_run[i]);
	492	dst->max_bw[i] = cpu_to_le64(src->max_bw[i]);
	493	dst->min_bw[i] = cpu_to_le64(src->min_bw[i]);
	494	dst->io_kb[i] = cpu_to_le64(src->io_kb[i]);
	495	dst->agg[i] = cpu_to_le64(src->agg[i]);
	496	}
	497
	498	dst->kb_base = cpu_to_le32(src->kb_base);
	499	dst->groupid = cpu_to_le32(src->groupid);
	500	}
	501
	502	/*
	503	* Send a CMD_TS, which packs struct thread_stat and group_run_stats
	504	* into a single payload.
	505	*/
	506	void fio_server_send_ts(struct thread_stat ts, struct group_run_stats rs)
	507	{
	508	struct cmd_ts_pdu p;
	509	int i, j;
	510
317b3c8b JA	511	memset(&p, 0, sizeof(p));
317b3c8b JA	512
a64e88da JA	513	strcpy(p.ts.name, ts->name);
	514	strcpy(p.ts.verror, ts->verror);
	515	strcpy(p.ts.description, ts->description);
	516
ddcc0b69	517	p.ts.error = cpu_to_le32(ts->error);
a64e88da	518	p.ts.groupid = cpu_to_le32(ts->groupid);
ddcc0b69	519	p.ts.pid = cpu_to_le32(ts->pid);
a64e88da JA	520	p.ts.members = cpu_to_le32(ts->members);
	521
	522	for (i = 0; i < 2; i++) {
	523	convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]);
	524	convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]);
	525	convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]);
	526	convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]);
	527	}
	528
	529	p.ts.usr_time = cpu_to_le64(ts->usr_time);
	530	p.ts.sys_time = cpu_to_le64(ts->sys_time);
	531	p.ts.ctx = cpu_to_le64(ts->ctx);
	532	p.ts.minf = cpu_to_le64(ts->minf);
	533	p.ts.majf = cpu_to_le64(ts->majf);
	534	p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles);
	535	p.ts.percentile_list = NULL;
	536
	537	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
	538	p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]);
	539	p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]);
	540	p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]);
	541	}
	542
	543	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
	544	p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]);
	545	p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]);
	546	}
	547
	548	for (i = 0; i < 2; i++)
	549	for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
	550	p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]);
	551
	552	for (i = 0; i < 3; i++) {
	553	p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]);
93eee04a	554	p.ts.short_io_u[i] = cpu_to_le64(ts->short_io_u[i]);
a64e88da JA	555	}
a64e88da JA	556
93eee04a	557	p.ts.total_submit = cpu_to_le64(ts->total_submit);
a64e88da JA	558	p.ts.total_complete = cpu_to_le64(ts->total_complete);
	559
	560	for (i = 0; i < 2; i++) {
	561	p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]);
	562	p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]);
	563	}
	564
	565	p.ts.total_run_time = cpu_to_le64(ts->total_run_time);
	566	p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error);
	567	p.ts.total_err_count = cpu_to_le64(ts->total_err_count);
ddcc0b69 JA	568	p.ts.first_error = cpu_to_le32(ts->first_error);
ddcc0b69 JA	569	p.ts.kb_base = cpu_to_le32(ts->kb_base);
a64e88da JA	570
	571	convert_gs(&p.rs, rs);
	572
	573	fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p));
	574	}
	575
	576	void fio_server_send_gs(struct group_run_stats *rs)
	577	{
	578	struct group_run_stats gs;
	579
	580	convert_gs(&gs, rs);
	581	fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs));
	582	}
	583
cf451d1e JA	584	void fio_server_send_status(void)
cf451d1e JA	585	{
1d1f45ae JA	586	struct jobs_eta *je;
	587	size_t size;
	588	void *buf;
cf451d1e JA	589	int i;
cf451d1e JA	590
1d1f45ae JA	591	size = sizeof(je) + thread_number sizeof(char);
	592	buf = malloc(size);
	593	memset(buf, 0, size);
	594	je = buf;
	595
	596	if (!calc_thread_status(je)) {
	597	free(je);
cf451d1e	598	return;
1d1f45ae	599	}
cf451d1e	600
1d1f45ae JA	601	je->nr_running = cpu_to_le32(je->nr_running);
	602	je->nr_ramp = cpu_to_le32(je->nr_ramp);
	603	je->nr_pending = cpu_to_le32(je->nr_pending);
	604	je->files_open = cpu_to_le32(je->files_open);
	605	je->m_rate = cpu_to_le32(je->m_rate);
	606	je->t_rate = cpu_to_le32(je->t_rate);
	607	je->m_iops = cpu_to_le32(je->m_iops);
	608	je->t_iops = cpu_to_le32(je->t_iops);
cf451d1e JA	609
cf451d1e JA	610	for (i = 0; i < 2; i++) {
1d1f45ae JA	611	je->rate[i] = cpu_to_le32(je->rate[i]);
1d1f45ae JA	612	je->iops[i] = cpu_to_le32(je->iops[i]);
cf451d1e JA	613	}
cf451d1e JA	614
1d1f45ae JA	615	je->elapsed_sec = cpu_to_le32(je->nr_running);
1d1f45ae JA	616	je->eta_sec = cpu_to_le64(je->eta_sec);
cf451d1e	617
1d1f45ae JA	618	fio_net_send_cmd(server_fd, FIO_NET_CMD_ETA, buf, size);
1d1f45ae JA	619	free(je);
cf451d1e JA	620	}
cf451d1e JA	621
142575e6 JA	622	int fio_server_log(const char *format, ...)
	623	{
	624	char buffer[1024];
	625	va_list args;
82fa6b21	626	size_t len;
142575e6 JA	627
142575e6 JA	628	va_start(args, format);
82fa6b21	629	len = vsnprintf(buffer, sizeof(buffer), format, args);
142575e6 JA	630	va_end(args);
142575e6 JA	631
82fa6b21	632	return fio_server_text_output(buffer, len);
37db14fe	633	}
e46d8091 JA	634
	635	int fio_start_server(int daemonize)
	636	{
	637	pid_t pid;
	638
	639	if (!daemonize)
	640	return fio_server();
	641
	642	openlog("fio", LOG_NDELAY\|LOG_NOWAIT\|LOG_PID, LOG_USER);
	643	pid = fork();
	644	if (pid < 0) {
	645	syslog(LOG_ERR, "failed server fork");
c28e8e8c	646	return -1;
e46d8091 JA	647	} else if (pid)
	648	exit(0);
	649
	650	setsid();
	651	close(STDIN_FILENO);
	652	close(STDOUT_FILENO);
	653	close(STDERR_FILENO);
	654	f_out = NULL;
	655	f_err = NULL;
	656	log_syslog = 1;
	657	return fio_server();
	658	}