[fio.git] / client.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <signal.h>

#include "fio.h"
#include "server.h"
#include "flist.h"
#include "hash.h"

struct fio_client {
	struct flist_head list;
	struct flist_head hash_list;
	struct sockaddr_in addr;
	struct sockaddr_un addr_un;
	char *hostname;
	int port;
	int fd;

	char *name;

	int state;
	int skip_newline;
	int is_sock;

	uint16_t argc;
	char **argv;
};

static struct jobs_eta client_etas;
static int received_etas;

enum {
	Client_created		= 0,
	Client_connected	= 1,
	Client_started		= 2,
	Client_stopped		= 3,
	Client_exited		= 4,
};

static FLIST_HEAD(client_list);

#define FIO_CLIENT_HASH_BITS	7
#define FIO_CLIENT_HASH_SZ	(1 << FIO_CLIENT_HASH_BITS)
#define FIO_CLIENT_HASH_MASK	(FIO_CLIENT_HASH_SZ - 1)
static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];

static int handle_client(struct fio_client *client);

static void fio_client_add_hash(struct fio_client *client)
{
	int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);

	bucket &= FIO_CLIENT_HASH_MASK;
	flist_add(&client->hash_list, &client_hash[bucket]);
}

static void fio_client_remove_hash(struct fio_client *client)
{
	if (!flist_empty(&client->hash_list))
		flist_del_init(&client->hash_list);
}

static void fio_init fio_client_hash_init(void)
{
	int i;

	for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
		INIT_FLIST_HEAD(&client_hash[i]);
}

static struct fio_client *find_client_by_fd(int fd)
{
	int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
	struct fio_client *client;
	struct flist_head *entry;

	flist_for_each(entry, &client_hash[bucket]) {
		client = flist_entry(entry, struct fio_client, hash_list);

		if (client->fd == fd)
			return client;
	}

	return NULL;
}

static void remove_client(struct fio_client *client)
{
	dprint(FD_NET, "client: removed <%s>\n", client->hostname);
	flist_del(&client->list);

	fio_client_remove_hash(client);

	free(client->hostname);
	if (client->argv)
		free(client->argv);
	if (client->name)
		free(client->name);

	free(client);
	nr_clients--;
}

static void __fio_client_add_cmd_option(struct fio_client *client,
					const char *opt)
{
	int index;

	index = client->argc++;
	client->argv = realloc(client->argv, sizeof(char *) * client->argc);
	client->argv[index] = strdup(opt);
	dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
}

void fio_client_add_cmd_option(void *cookie, const char *opt)
{
	struct fio_client *client = cookie;

	if (!client || !opt)
		return;

	__fio_client_add_cmd_option(client, opt);
}

int fio_client_add(const char *hostname, void **cookie)
{
	struct fio_client *client;

	client = malloc(sizeof(*client));
	memset(client, 0, sizeof(*client));

	INIT_FLIST_HEAD(&client->list);
	INIT_FLIST_HEAD(&client->hash_list);

	if (fio_server_parse_string(hostname, &client->hostname,
					&client->is_sock, &client->port,
					&client->addr.sin_addr))
		return -1;

	client->fd = -1;

	__fio_client_add_cmd_option(client, "fio");

	flist_add(&client->list, &client_list);
	nr_clients++;
	dprint(FD_NET, "client: added <%s>\n", client->hostname);
	*cookie = client;
	return 0;
}

static int fio_client_connect_ip(struct fio_client *client)
{
	int fd;

	client->addr.sin_family = AF_INET;
	client->addr.sin_port = htons(client->port);

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

	if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
		log_err("fio: connect: %s\n", strerror(errno));
		log_err("fio: failed to connect to %s:%u\n", client->hostname,
								client->port);
		close(fd);
		return -1;
	}

	return fd;
}

static int fio_client_connect_sock(struct fio_client *client)
{
	struct sockaddr_un *addr = &client->addr_un;
	fio_socklen_t len;
	int fd;

	memset(addr, 0, sizeof(*addr));
	addr->sun_family = AF_UNIX;
	strcpy(addr->sun_path, client->hostname);

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

	len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
	if (connect(fd, (struct sockaddr *) addr, len) < 0) {
		log_err("fio: connect; %s\n", strerror(errno));
		close(fd);
		return -1;
	}

	return fd;
}

static int fio_client_connect(struct fio_client *client)
{
	int fd;

	dprint(FD_NET, "client: connect to host %s\n", client->hostname);

	if (client->is_sock)
		fd = fio_client_connect_sock(client);
	else
		fd = fio_client_connect_ip(client);

	if (fd < 0)
		return 1;

	client->fd = fd;
	fio_client_add_hash(client);
	client->state = Client_connected;
	return 0;
}

void fio_clients_terminate(void)
{
	struct flist_head *entry;
	struct fio_client *client;

	dprint(FD_NET, "client: terminate clients\n");

	flist_for_each(entry, &client_list) {
		client = flist_entry(entry, struct fio_client, list);

		fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
	}
}

static void sig_int(int sig)
{
	dprint(FD_NET, "client: got signal %d\n", sig);
	fio_clients_terminate();
}

static void client_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);
}

static void probe_client(struct fio_client *client)
{
	dprint(FD_NET, "client: send probe\n");

	fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
	handle_client(client);
}

static int send_client_cmd_line(struct fio_client *client)
{
	struct cmd_single_line_pdu *cslp;
	struct cmd_line_pdu *clp;
	unsigned long offset;
	void *pdu;
	size_t mem;
	int i, ret;

	dprint(FD_NET, "client: send cmdline %d\n", client->argc);

	/*
	 * Find out how much mem we need
	 */
	for (i = 0, mem = 0; i < client->argc; i++)
		mem += strlen(client->argv[i]) + 1;

	/*
	 * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
	 */
	mem += sizeof(*clp) + (client->argc * sizeof(*cslp));

	pdu = malloc(mem);
	clp = pdu;
	offset = sizeof(*clp);

	for (i = 0; i < client->argc; i++) {
		uint16_t arg_len = strlen(client->argv[i]) + 1;

		cslp = pdu + offset;
		strcpy((char *) cslp->text, client->argv[i]);
		cslp->len = cpu_to_le16(arg_len);
		offset += sizeof(*cslp) + arg_len;
	}

	clp->lines = cpu_to_le16(client->argc);
	ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem);
	free(pdu);
	return ret;
}

int fio_clients_connect(void)
{
	struct fio_client *client;
	struct flist_head *entry, *tmp;
	int ret;

	dprint(FD_NET, "client: connect all\n");

	client_signal_handler();

	flist_for_each_safe(entry, tmp, &client_list) {
		client = flist_entry(entry, struct fio_client, list);

		ret = fio_client_connect(client);
		if (ret) {
			remove_client(client);
			continue;
		}

		probe_client(client);

		if (client->argc > 1)
			send_client_cmd_line(client);
	}

	return !nr_clients;
}

/*
 * Send file contents to server backend. We could use sendfile(), but to remain
 * more portable lets just read/write the darn thing.
 */
static int fio_client_send_ini(struct fio_client *client, const char *filename)
{
	struct stat sb;
	char *p, *buf;
	off_t len;
	int fd, ret;

	dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);

	fd = open(filename, O_RDONLY);
	if (fd < 0) {
		log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
		return 1;
	}

	if (fstat(fd, &sb) < 0) {
		log_err("fio: job file stat: %s\n", strerror(errno));
		close(fd);
		return 1;
	}

	buf = malloc(sb.st_size);

	len = sb.st_size;
	p = buf;
	do {
		ret = read(fd, p, len);
		if (ret > 0) {
			len -= ret;
			if (!len)
				break;
			p += ret;
			continue;
		} else if (!ret)
			break;
		else if (errno == EAGAIN || errno == EINTR)
			continue;
	} while (1);

	if (len) {
		log_err("fio: failed reading job file %s\n", filename);
		close(fd);
		free(buf);
		return 1;
	}

	ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
	free(buf);
	close(fd);
	return ret;
}

int fio_clients_send_ini(const char *filename)
{
	struct fio_client *client;
	struct flist_head *entry, *tmp;

	flist_for_each_safe(entry, tmp, &client_list) {
		client = flist_entry(entry, struct fio_client, list);

		if (fio_client_send_ini(client, filename))
			remove_client(client);
	}

	return !nr_clients;
}

static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
{
	dst->max_val	= le64_to_cpu(src->max_val);
	dst->min_val	= le64_to_cpu(src->min_val);
	dst->samples	= le64_to_cpu(src->samples);

	/*
	 * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
	 */
	dst->mean.u.f	= fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
	dst->S.u.f	= fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
}

static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
{
	int i, j;

	dst->error	= le32_to_cpu(src->error);
	dst->groupid	= le32_to_cpu(src->groupid);
	dst->pid	= le32_to_cpu(src->pid);
	dst->members	= le32_to_cpu(src->members);

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

	dst->usr_time		= le64_to_cpu(src->usr_time);
	dst->sys_time		= le64_to_cpu(src->sys_time);
	dst->ctx		= le64_to_cpu(src->ctx);
	dst->minf		= le64_to_cpu(src->minf);
	dst->majf		= le64_to_cpu(src->majf);
	dst->clat_percentiles	= le64_to_cpu(src->clat_percentiles);

	for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
		fio_fp64_t *fps = &src->percentile_list[i];
		fio_fp64_t *fpd = &dst->percentile_list[i];

		fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
	}

	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
		dst->io_u_map[i]	= le32_to_cpu(src->io_u_map[i]);
		dst->io_u_submit[i]	= le32_to_cpu(src->io_u_submit[i]);
		dst->io_u_complete[i]	= le32_to_cpu(src->io_u_complete[i]);
	}

	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
		dst->io_u_lat_u[i]	= le32_to_cpu(src->io_u_lat_u[i]);
		dst->io_u_lat_m[i]	= le32_to_cpu(src->io_u_lat_m[i]);
	}

	for (i = 0; i < 2; i++)
		for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
			dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);

	for (i = 0; i < 3; i++) {
		dst->total_io_u[i]	= le64_to_cpu(src->total_io_u[i]);
		dst->short_io_u[i]	= le64_to_cpu(src->short_io_u[i]);
	}

	dst->total_submit	= le64_to_cpu(src->total_submit);
	dst->total_complete	= le64_to_cpu(src->total_complete);

	for (i = 0; i < 2; i++) {
		dst->io_bytes[i]	= le64_to_cpu(src->io_bytes[i]);
		dst->runtime[i]		= le64_to_cpu(src->runtime[i]);
	}

	dst->total_run_time	= le64_to_cpu(src->total_run_time);
	dst->continue_on_error	= le16_to_cpu(src->continue_on_error);
	dst->total_err_count	= le64_to_cpu(src->total_err_count);
	dst->first_error	= le32_to_cpu(src->first_error);
	dst->kb_base		= le32_to_cpu(src->kb_base);
}

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]		= le64_to_cpu(src->max_run[i]);
		dst->min_run[i]		= le64_to_cpu(src->min_run[i]);
		dst->max_bw[i]		= le64_to_cpu(src->max_bw[i]);
		dst->min_bw[i]		= le64_to_cpu(src->min_bw[i]);
		dst->io_kb[i]		= le64_to_cpu(src->io_kb[i]);
		dst->agg[i]		= le64_to_cpu(src->agg[i]);
	}

	dst->kb_base	= le32_to_cpu(src->kb_base);
	dst->groupid	= le32_to_cpu(src->groupid);
}

static void handle_ts(struct fio_net_cmd *cmd)
{
	struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;

	convert_ts(&p->ts, &p->ts);
	convert_gs(&p->rs, &p->rs);

	show_thread_status(&p->ts, &p->rs);
}

static void handle_gs(struct fio_net_cmd *cmd)
{
	struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;

	convert_gs(gs, gs);
	show_group_stats(gs);
}

static void convert_jobs_eta(struct jobs_eta *je)
{
	int i;

	je->nr_running		= le32_to_cpu(je->nr_running);
	je->nr_ramp		= le32_to_cpu(je->nr_ramp);
	je->nr_pending		= le32_to_cpu(je->nr_pending);
	je->files_open		= le32_to_cpu(je->files_open);
	je->m_rate		= le32_to_cpu(je->m_rate);
	je->t_rate		= le32_to_cpu(je->t_rate);
	je->m_iops		= le32_to_cpu(je->m_iops);
	je->t_iops		= le32_to_cpu(je->t_iops);

	for (i = 0; i < 2; i++) {
		je->rate[i]	= le32_to_cpu(je->rate[i]);
		je->iops[i]	= le32_to_cpu(je->iops[i]);
	}

	je->elapsed_sec		= le64_to_cpu(je->elapsed_sec);
	je->eta_sec		= le64_to_cpu(je->eta_sec);
}

static void sum_jobs_eta(struct jobs_eta *je)
{
	struct jobs_eta *dst = &client_etas;
	int i;

	dst->nr_running		+= je->nr_running;
	dst->nr_ramp		+= je->nr_ramp;
	dst->nr_pending		+= je->nr_pending;
	dst->files_open		+= je->files_open;
	dst->m_rate		+= je->m_rate;
	dst->t_rate		+= je->t_rate;
	dst->m_iops		+= je->m_iops;
	dst->t_iops		+= je->t_iops;

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

	dst->elapsed_sec	+= je->elapsed_sec;

	if (je->eta_sec > dst->eta_sec)
		dst->eta_sec = je->eta_sec;
}

static void handle_eta(struct fio_net_cmd *cmd)
{
	struct jobs_eta *je = (struct jobs_eta *) cmd->payload;

	convert_jobs_eta(je);

	if (nr_clients > 1) {
		sum_jobs_eta(je);
		received_etas++;
		if (received_etas == nr_clients) {
			received_etas = 0;
			display_thread_status(&client_etas);
			memset(&client_etas, 0, sizeof(client_etas));
		}
	} else
		display_thread_status(je);
}

static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
{
	struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
	const char *os, *arch;

	os = fio_get_os_string(probe->os);
	if (!os)
		os = "unknown";

	arch = fio_get_arch_string(probe->arch);
	if (!arch)
		os = "unknown";

	log_info("hostname=%s, be=%u, os=%s, arch=%s, fio=%u.%u.%u\n",
		probe->hostname, probe->bigendian, os, arch, probe->fio_major,
		probe->fio_minor, probe->fio_patch);

	if (!client->name)
		client->name = strdup((char *) probe->hostname);
}

static int handle_client(struct fio_client *client)
{
	struct fio_net_cmd *cmd;

	dprint(FD_NET, "client: handle %s\n", client->hostname);

	cmd = fio_net_recv_cmd(client->fd);
	if (!cmd)
		return 0;

	dprint(FD_NET, "client: got cmd op %d from %s\n",
					cmd->opcode, client->hostname);

	switch (cmd->opcode) {
	case FIO_NET_CMD_QUIT:
		remove_client(client);
		free(cmd);
		break;
	case FIO_NET_CMD_TEXT: {
		const char *buf = (const char *) cmd->payload;
		const char *name;
		int fio_unused ret;

		name = client->name ? client->name : client->hostname;

		if (!client->skip_newline)
			fprintf(f_out, "<%s> ", name);
		ret = fwrite(buf, cmd->pdu_len, 1, f_out);
		fflush(f_out);
		client->skip_newline = strchr(buf, '\n') == NULL;
		free(cmd);
		break;
		}
	case FIO_NET_CMD_TS:
		handle_ts(cmd);
		free(cmd);
		break;
	case FIO_NET_CMD_GS:
		handle_gs(cmd);
		free(cmd);
		break;
	case FIO_NET_CMD_ETA:
		handle_eta(cmd);
		free(cmd);
		break;
	case FIO_NET_CMD_PROBE:
		handle_probe(client, cmd);
		free(cmd);
		break;
	case FIO_NET_CMD_START:
		client->state = Client_started;
		free(cmd);
		break;
	case FIO_NET_CMD_STOP:
		client->state = Client_stopped;
		free(cmd);
		break;
	default:
		log_err("fio: unknown client op: %d\n", cmd->opcode);
		free(cmd);
		break;
	}

	return 1;
}

int fio_handle_clients(void)
{
	struct fio_client *client;
	struct flist_head *entry;
	struct pollfd *pfds;
	int i, ret = 0;

	pfds = malloc(nr_clients * sizeof(struct pollfd));

	while (!exit_backend && nr_clients) {
		i = 0;
		flist_for_each(entry, &client_list) {
			client = flist_entry(entry, struct fio_client, list);

			pfds[i].fd = client->fd;
			pfds[i].events = POLLIN;
			i++;
		}

		assert(i == nr_clients);

		do {
			ret = poll(pfds, nr_clients, 100);
			if (ret < 0) {
				if (errno == EINTR)
					continue;
				log_err("fio: poll clients: %s\n", strerror(errno));
				break;
			} else if (!ret)
				continue;
		} while (ret <= 0);

		for (i = 0; i < nr_clients; i++) {
			if (!(pfds[i].revents & POLLIN))
				continue;

			client = find_client_by_fd(pfds[i].fd);
			if (!client) {
				log_err("fio: unknown client fd %d\n", pfds[i].fd);
				continue;
			}
			if (!handle_client(client)) {
				log_info("client: host=%s disconnected\n",
						client->hostname);
				remove_client(client);
			}
		}
	}

	free(pfds);
	return 0;
}
Commit	Line	Data
132159a5 JA	1	#include <stdio.h>
	2	#include <stdlib.h>
	3	#include <unistd.h>
	4	#include <limits.h>
	5	#include <errno.h>
	6	#include <fcntl.h>
	7	#include <sys/poll.h>
	8	#include <sys/types.h>
	9	#include <sys/stat.h>
	10	#include <sys/wait.h>
d05c4a03	11	#include <sys/socket.h>
87aa8f19	12	#include <sys/un.h>
132159a5 JA	13	#include <netinet/in.h>
	14	#include <arpa/inet.h>
	15	#include <netdb.h>
9e22ecb0	16	#include <signal.h>
132159a5 JA	17
	18	#include "fio.h"
	19	#include "server.h"
b66570dc	20	#include "flist.h"
3c5f57e3	21	#include "hash.h"
132159a5	22
b66570dc JA	23	struct fio_client {
b66570dc JA	24	struct flist_head list;
bebe6398	25	struct flist_head hash_list;
b66570dc	26	struct sockaddr_in addr;
87aa8f19	27	struct sockaddr_un addr_un;
b66570dc	28	char *hostname;
bebe6398	29	int port;
b66570dc	30	int fd;
81179eec	31
b5296ddb JA	32	char *name;
b5296ddb JA	33
81179eec	34	int state;
17dd1764	35	int skip_newline;
87aa8f19	36	int is_sock;
81179eec JA	37
	38	uint16_t argc;
	39	char **argv;
	40	};
	41
48fbb46e JA	42	static struct jobs_eta client_etas;
	43	static int received_etas;
	44
81179eec	45	enum {
5c2857f9	46	Client_created = 0,
81179eec JA	47	Client_connected = 1,
	48	Client_started = 2,
	49	Client_stopped = 3,
5c2857f9	50	Client_exited = 4,
b66570dc JA	51	};
	52
	53	static FLIST_HEAD(client_list);
b66570dc	54
3c5f57e3 JA	55	#define FIO_CLIENT_HASH_BITS 7
	56	#define FIO_CLIENT_HASH_SZ (1 << FIO_CLIENT_HASH_BITS)
	57	#define FIO_CLIENT_HASH_MASK (FIO_CLIENT_HASH_SZ - 1)
bebe6398	58	static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
3c5f57e3	59
e951bdc4	60	static int handle_client(struct fio_client *client);
0b8f30a5	61
bebe6398	62	static void fio_client_add_hash(struct fio_client *client)
3c5f57e3 JA	63	{
	64	int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
	65
	66	bucket &= FIO_CLIENT_HASH_MASK;
bebe6398	67	flist_add(&client->hash_list, &client_hash[bucket]);
3c5f57e3 JA	68	}
3c5f57e3 JA	69
bebe6398	70	static void fio_client_remove_hash(struct fio_client *client)
3c5f57e3	71	{
bebe6398 JA	72	if (!flist_empty(&client->hash_list))
bebe6398 JA	73	flist_del_init(&client->hash_list);
3c5f57e3 JA	74	}
	75
	76	static void fio_init fio_client_hash_init(void)
	77	{
	78	int i;
	79
bebe6398 JA	80	for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
bebe6398 JA	81	INIT_FLIST_HEAD(&client_hash[i]);
3c5f57e3 JA	82	}
3c5f57e3 JA	83
b66570dc JA	84	static struct fio_client *find_client_by_fd(int fd)
b66570dc JA	85	{
3c5f57e3	86	int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
b66570dc JA	87	struct fio_client *client;
	88	struct flist_head *entry;
	89
bebe6398 JA	90	flist_for_each(entry, &client_hash[bucket]) {
bebe6398 JA	91	client = flist_entry(entry, struct fio_client, hash_list);
b66570dc JA	92
	93	if (client->fd == fd)
	94	return client;
	95	}
	96
	97	return NULL;
	98	}
	99
b66570dc JA	100	static void remove_client(struct fio_client *client)
b66570dc JA	101	{
39e8e016	102	dprint(FD_NET, "client: removed <%s>\n", client->hostname);
b66570dc	103	flist_del(&client->list);
3c5f57e3	104
bebe6398	105	fio_client_remove_hash(client);
81179eec	106
b66570dc	107	free(client->hostname);
81179eec JA	108	if (client->argv)
81179eec JA	109	free(client->argv);
b5296ddb JA	110	if (client->name)
b5296ddb JA	111	free(client->name);
81179eec	112
b66570dc	113	free(client);
3c5f57e3	114	nr_clients--;
b66570dc	115	}
132159a5	116
fa2ea806 JA	117	static void __fio_client_add_cmd_option(struct fio_client *client,
fa2ea806 JA	118	const char *opt)
81179eec	119	{
39e8e016 JA	120	int index;
	121
	122	index = client->argc++;
81179eec	123	client->argv = realloc(client->argv, sizeof(char ) client->argc);
39e8e016 JA	124	client->argv[index] = strdup(opt);
39e8e016 JA	125	dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
81179eec JA	126	}
81179eec JA	127
fa2ea806	128	void fio_client_add_cmd_option(void cookie, const char opt)
81179eec	129	{
bebe6398	130	struct fio_client *client = cookie;
81179eec	131
bebe6398	132	if (!client \|\| !opt)
fa2ea806	133	return;
81179eec	134
fa2ea806	135	__fio_client_add_cmd_option(client, opt);
81179eec JA	136	}
81179eec JA	137
bebe6398	138	int fio_client_add(const char hostname, void *cookie)
132159a5	139	{
b66570dc	140	struct fio_client *client;
132159a5	141
b66570dc	142	client = malloc(sizeof(*client));
a37f69b7	143	memset(client, 0, sizeof(*client));
81179eec	144
3c5f57e3	145	INIT_FLIST_HEAD(&client->list);
bebe6398	146	INIT_FLIST_HEAD(&client->hash_list);
3c5f57e3	147
bebe6398 JA	148	if (fio_server_parse_string(hostname, &client->hostname,
	149	&client->is_sock, &client->port,
	150	&client->addr.sin_addr))
	151	return -1;
87aa8f19	152
bebe6398	153	client->fd = -1;
3c5f57e3	154
81179eec JA	155	__fio_client_add_cmd_option(client, "fio");
81179eec JA	156
a37f69b7 JA	157	flist_add(&client->list, &client_list);
a37f69b7 JA	158	nr_clients++;
bebe6398 JA	159	dprint(FD_NET, "client: added <%s>\n", client->hostname);
	160	*cookie = client;
	161	return 0;
a37f69b7 JA	162	}
a37f69b7 JA	163
87aa8f19	164	static int fio_client_connect_ip(struct fio_client *client)
a37f69b7 JA	165	{
a37f69b7 JA	166	int fd;
132159a5	167
b66570dc	168	client->addr.sin_family = AF_INET;
bebe6398	169	client->addr.sin_port = htons(client->port);
132159a5 JA	170
	171	fd = socket(AF_INET, SOCK_STREAM, 0);
	172	if (fd < 0) {
	173	log_err("fio: socket: %s\n", strerror(errno));
87aa8f19	174	return -1;
132159a5 JA	175	}
132159a5 JA	176
b66570dc	177	if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
132159a5	178	log_err("fio: connect: %s\n", strerror(errno));
a7de0a11 JA	179	log_err("fio: failed to connect to %s:%u\n", client->hostname,
a7de0a11 JA	180	client->port);
b94cba47	181	close(fd);
87aa8f19 JA	182	return -1;
	183	}
	184
	185	return fd;
	186	}
	187
	188	static int fio_client_connect_sock(struct fio_client *client)
	189	{
	190	struct sockaddr_un *addr = &client->addr_un;
	191	fio_socklen_t len;
	192	int fd;
	193
	194	memset(addr, 0, sizeof(*addr));
	195	addr->sun_family = AF_UNIX;
	196	strcpy(addr->sun_path, client->hostname);
	197
	198	fd = socket(AF_UNIX, SOCK_STREAM, 0);
	199	if (fd < 0) {
	200	log_err("fio: socket: %s\n", strerror(errno));
	201	return -1;
	202	}
	203
	204	len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
	205	if (connect(fd, (struct sockaddr *) addr, len) < 0) {
	206	log_err("fio: connect; %s\n", strerror(errno));
b94cba47	207	close(fd);
87aa8f19	208	return -1;
132159a5 JA	209	}
132159a5 JA	210
87aa8f19 JA	211	return fd;
	212	}
	213
	214	static int fio_client_connect(struct fio_client *client)
	215	{
	216	int fd;
	217
	218	dprint(FD_NET, "client: connect to host %s\n", client->hostname);
	219
87aa8f19 JA	220	if (client->is_sock)
	221	fd = fio_client_connect_sock(client);
	222	else
	223	fd = fio_client_connect_ip(client);
	224
	225	if (fd < 0)
	226	return 1;
	227
b66570dc	228	client->fd = fd;
bebe6398	229	fio_client_add_hash(client);
81179eec	230	client->state = Client_connected;
132159a5 JA	231	return 0;
	232	}
	233
cc0df00a JA	234	void fio_clients_terminate(void)
	235	{
	236	struct flist_head *entry;
	237	struct fio_client *client;
	238
60efd14e JA	239	dprint(FD_NET, "client: terminate clients\n");
60efd14e JA	240
cc0df00a JA	241	flist_for_each(entry, &client_list) {
	242	client = flist_entry(entry, struct fio_client, list);
	243
	244	fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
	245	}
	246	}
	247
	248	static void sig_int(int sig)
	249	{
bebe6398	250	dprint(FD_NET, "client: got signal %d\n", sig);
cc0df00a JA	251	fio_clients_terminate();
	252	}
	253
	254	static void client_signal_handler(void)
	255	{
	256	struct sigaction act;
	257
	258	memset(&act, 0, sizeof(act));
	259	act.sa_handler = sig_int;
	260	act.sa_flags = SA_RESTART;
	261	sigaction(SIGINT, &act, NULL);
	262
	263	memset(&act, 0, sizeof(act));
	264	act.sa_handler = sig_int;
	265	act.sa_flags = SA_RESTART;
	266	sigaction(SIGTERM, &act, NULL);
	267	}
	268
0b8f30a5 JA	269	static void probe_client(struct fio_client *client)
0b8f30a5 JA	270	{
60efd14e JA	271	dprint(FD_NET, "client: send probe\n");
60efd14e JA	272
0b8f30a5	273	fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
e951bdc4	274	handle_client(client);
0b8f30a5 JA	275	}
0b8f30a5 JA	276
81179eec JA	277	static int send_client_cmd_line(struct fio_client *client)
81179eec JA	278	{
fa2ea806 JA	279	struct cmd_single_line_pdu *cslp;
	280	struct cmd_line_pdu *clp;
	281	unsigned long offset;
	282	void *pdu;
	283	size_t mem;
81179eec JA	284	int i, ret;
81179eec JA	285
39e8e016	286	dprint(FD_NET, "client: send cmdline %d\n", client->argc);
60efd14e	287
fa2ea806 JA	288	/*
	289	* Find out how much mem we need
	290	*/
	291	for (i = 0, mem = 0; i < client->argc; i++)
	292	mem += strlen(client->argv[i]) + 1;
	293
	294	/*
	295	* We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
	296	*/
	297	mem += sizeof(clp) + (client->argc sizeof(*cslp));
	298
	299	pdu = malloc(mem);
	300	clp = pdu;
	301	offset = sizeof(*clp);
	302
	303	for (i = 0; i < client->argc; i++) {
	304	uint16_t arg_len = strlen(client->argv[i]) + 1;
	305
	306	cslp = pdu + offset;
	307	strcpy((char *) cslp->text, client->argv[i]);
	308	cslp->len = cpu_to_le16(arg_len);
	309	offset += sizeof(*cslp) + arg_len;
	310	}
81179eec	311
fa2ea806 JA	312	clp->lines = cpu_to_le16(client->argc);
fa2ea806 JA	313	ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem);
81179eec JA	314	free(pdu);
	315	return ret;
	316	}
	317
a37f69b7 JA	318	int fio_clients_connect(void)
	319	{
	320	struct fio_client *client;
	321	struct flist_head entry, tmp;
	322	int ret;
	323
60efd14e JA	324	dprint(FD_NET, "client: connect all\n");
60efd14e JA	325
cc0df00a JA	326	client_signal_handler();
cc0df00a JA	327
a37f69b7 JA	328	flist_for_each_safe(entry, tmp, &client_list) {
	329	client = flist_entry(entry, struct fio_client, list);
	330
	331	ret = fio_client_connect(client);
0b8f30a5	332	if (ret) {
a37f69b7	333	remove_client(client);
0b8f30a5 JA	334	continue;
	335	}
	336
	337	probe_client(client);
81179eec JA	338
	339	if (client->argc > 1)
	340	send_client_cmd_line(client);
a37f69b7 JA	341	}
	342
	343	return !nr_clients;
	344	}
	345
132159a5 JA	346	/*
	347	* Send file contents to server backend. We could use sendfile(), but to remain
	348	* more portable lets just read/write the darn thing.
	349	*/
a37f69b7	350	static int fio_client_send_ini(struct fio_client client, const char filename)
132159a5 JA	351	{
	352	struct stat sb;
	353	char p, buf;
	354	off_t len;
	355	int fd, ret;
	356
46c48f1f JA	357	dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
46c48f1f JA	358
132159a5 JA	359	fd = open(filename, O_RDONLY);
132159a5 JA	360	if (fd < 0) {
e951bdc4	361	log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
132159a5 JA	362	return 1;
	363	}
	364
	365	if (fstat(fd, &sb) < 0) {
	366	log_err("fio: job file stat: %s\n", strerror(errno));
b94cba47	367	close(fd);
132159a5 JA	368	return 1;
	369	}
	370
	371	buf = malloc(sb.st_size);
	372
	373	len = sb.st_size;
	374	p = buf;
	375	do {
	376	ret = read(fd, p, len);
	377	if (ret > 0) {
	378	len -= ret;
	379	if (!len)
	380	break;
	381	p += ret;
	382	continue;
	383	} else if (!ret)
	384	break;
	385	else if (errno == EAGAIN \|\| errno == EINTR)
	386	continue;
	387	} while (1);
	388
0b8f30a5 JA	389	if (len) {
0b8f30a5 JA	390	log_err("fio: failed reading job file %s\n", filename);
b94cba47	391	close(fd);
c524ef72	392	free(buf);
0b8f30a5 JA	393	return 1;
	394	}
	395
81179eec	396	ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
132159a5	397	free(buf);
b94cba47	398	close(fd);
132159a5 JA	399	return ret;
132159a5 JA	400	}
37db14fe	401
a37f69b7 JA	402	int fio_clients_send_ini(const char *filename)
	403	{
	404	struct fio_client *client;
	405	struct flist_head entry, tmp;
	406
	407	flist_for_each_safe(entry, tmp, &client_list) {
	408	client = flist_entry(entry, struct fio_client, list);
	409
	410	if (fio_client_send_ini(client, filename))
	411	remove_client(client);
	412	}
	413
	414	return !nr_clients;
	415	}
	416
a64e88da JA	417	static void convert_io_stat(struct io_stat dst, struct io_stat src)
	418	{
	419	dst->max_val = le64_to_cpu(src->max_val);
	420	dst->min_val = le64_to_cpu(src->min_val);
	421	dst->samples = le64_to_cpu(src->samples);
802ad4a8 JA	422
	423	/*
	424	* Floats arrive as IEEE 754 encoded uint64_t, convert back to double
	425	*/
	426	dst->mean.u.f = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
	427	dst->S.u.f = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
a64e88da JA	428	}
	429
	430	static void convert_ts(struct thread_stat dst, struct thread_stat src)
	431	{
	432	int i, j;
	433
	434	dst->error = le32_to_cpu(src->error);
	435	dst->groupid = le32_to_cpu(src->groupid);
	436	dst->pid = le32_to_cpu(src->pid);
	437	dst->members = le32_to_cpu(src->members);
	438
	439	for (i = 0; i < 2; i++) {
	440	convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
	441	convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
	442	convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
	443	convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
	444	}
	445
	446	dst->usr_time = le64_to_cpu(src->usr_time);
	447	dst->sys_time = le64_to_cpu(src->sys_time);
	448	dst->ctx = le64_to_cpu(src->ctx);
	449	dst->minf = le64_to_cpu(src->minf);
	450	dst->majf = le64_to_cpu(src->majf);
	451	dst->clat_percentiles = le64_to_cpu(src->clat_percentiles);
802ad4a8 JA	452
	453	for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
	454	fio_fp64_t *fps = &src->percentile_list[i];
	455	fio_fp64_t *fpd = &dst->percentile_list[i];
	456
	457	fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
	458	}
a64e88da JA	459
	460	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
	461	dst->io_u_map[i] = le32_to_cpu(src->io_u_map[i]);
	462	dst->io_u_submit[i] = le32_to_cpu(src->io_u_submit[i]);
	463	dst->io_u_complete[i] = le32_to_cpu(src->io_u_complete[i]);
	464	}
	465
	466	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
	467	dst->io_u_lat_u[i] = le32_to_cpu(src->io_u_lat_u[i]);
	468	dst->io_u_lat_m[i] = le32_to_cpu(src->io_u_lat_m[i]);
	469	}
	470
	471	for (i = 0; i < 2; i++)
	472	for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
	473	dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
	474
	475	for (i = 0; i < 3; i++) {
	476	dst->total_io_u[i] = le64_to_cpu(src->total_io_u[i]);
93eee04a	477	dst->short_io_u[i] = le64_to_cpu(src->short_io_u[i]);
a64e88da JA	478	}
	479
	480	dst->total_submit = le64_to_cpu(src->total_submit);
	481	dst->total_complete = le64_to_cpu(src->total_complete);
	482
	483	for (i = 0; i < 2; i++) {
	484	dst->io_bytes[i] = le64_to_cpu(src->io_bytes[i]);
	485	dst->runtime[i] = le64_to_cpu(src->runtime[i]);
	486	}
	487
	488	dst->total_run_time = le64_to_cpu(src->total_run_time);
	489	dst->continue_on_error = le16_to_cpu(src->continue_on_error);
	490	dst->total_err_count = le64_to_cpu(src->total_err_count);
ddcc0b69 JA	491	dst->first_error = le32_to_cpu(src->first_error);
ddcc0b69 JA	492	dst->kb_base = le32_to_cpu(src->kb_base);
a64e88da JA	493	}
	494
	495	static void convert_gs(struct group_run_stats dst, struct group_run_stats src)
	496	{
	497	int i;
	498
	499	for (i = 0; i < 2; i++) {
	500	dst->max_run[i] = le64_to_cpu(src->max_run[i]);
	501	dst->min_run[i] = le64_to_cpu(src->min_run[i]);
	502	dst->max_bw[i] = le64_to_cpu(src->max_bw[i]);
	503	dst->min_bw[i] = le64_to_cpu(src->min_bw[i]);
	504	dst->io_kb[i] = le64_to_cpu(src->io_kb[i]);
	505	dst->agg[i] = le64_to_cpu(src->agg[i]);
	506	}
	507
	508	dst->kb_base = le32_to_cpu(src->kb_base);
	509	dst->groupid = le32_to_cpu(src->groupid);
	510	}
	511
	512	static void handle_ts(struct fio_net_cmd *cmd)
	513	{
	514	struct cmd_ts_pdu p = (struct cmd_ts_pdu ) cmd->payload;
	515
	516	convert_ts(&p->ts, &p->ts);
	517	convert_gs(&p->rs, &p->rs);
	518
	519	show_thread_status(&p->ts, &p->rs);
	520	}
	521
	522	static void handle_gs(struct fio_net_cmd *cmd)
	523	{
	524	struct group_run_stats gs = (struct group_run_stats ) cmd->payload;
	525
	526	convert_gs(gs, gs);
	527	show_group_stats(gs);
	528	}
	529
48fbb46e	530	static void convert_jobs_eta(struct jobs_eta *je)
cf451d1e	531	{
cf451d1e JA	532	int i;
	533
	534	je->nr_running = le32_to_cpu(je->nr_running);
	535	je->nr_ramp = le32_to_cpu(je->nr_ramp);
	536	je->nr_pending = le32_to_cpu(je->nr_pending);
	537	je->files_open = le32_to_cpu(je->files_open);
	538	je->m_rate = le32_to_cpu(je->m_rate);
	539	je->t_rate = le32_to_cpu(je->t_rate);
	540	je->m_iops = le32_to_cpu(je->m_iops);
	541	je->t_iops = le32_to_cpu(je->t_iops);
	542
	543	for (i = 0; i < 2; i++) {
	544	je->rate[i] = le32_to_cpu(je->rate[i]);
	545	je->iops[i] = le32_to_cpu(je->iops[i]);
	546	}
	547
b51eedb7	548	je->elapsed_sec = le64_to_cpu(je->elapsed_sec);
cf451d1e	549	je->eta_sec = le64_to_cpu(je->eta_sec);
48fbb46e JA	550	}
	551
	552	static void sum_jobs_eta(struct jobs_eta *je)
	553	{
	554	struct jobs_eta *dst = &client_etas;
	555	int i;
	556
	557	dst->nr_running += je->nr_running;
	558	dst->nr_ramp += je->nr_ramp;
	559	dst->nr_pending += je->nr_pending;
	560	dst->files_open += je->files_open;
	561	dst->m_rate += je->m_rate;
	562	dst->t_rate += je->t_rate;
	563	dst->m_iops += je->m_iops;
	564	dst->t_iops += je->t_iops;
	565
	566	for (i = 0; i < 2; i++) {
	567	dst->rate[i] += je->rate[i];
	568	dst->iops[i] += je->iops[i];
	569	}
	570
	571	dst->elapsed_sec += je->elapsed_sec;
	572
	573	if (je->eta_sec > dst->eta_sec)
	574	dst->eta_sec = je->eta_sec;
	575	}
	576
	577	static void handle_eta(struct fio_net_cmd *cmd)
	578	{
	579	struct jobs_eta je = (struct jobs_eta ) cmd->payload;
cf451d1e	580
48fbb46e JA	581	convert_jobs_eta(je);
	582
	583	if (nr_clients > 1) {
	584	sum_jobs_eta(je);
	585	received_etas++;
	586	if (received_etas == nr_clients) {
	587	received_etas = 0;
	588	display_thread_status(&client_etas);
	589	memset(&client_etas, 0, sizeof(client_etas));
	590	}
	591	} else
	592	display_thread_status(je);
cf451d1e JA	593	}
cf451d1e JA	594
b5296ddb	595	static void handle_probe(struct fio_client client, struct fio_net_cmd cmd)
2e03b4b2 JA	596	{
2e03b4b2 JA	597	struct cmd_probe_pdu probe = (struct cmd_probe_pdu ) cmd->payload;
cca84643	598	const char os, arch;
2e03b4b2	599
cca84643 JA	600	os = fio_get_os_string(probe->os);
	601	if (!os)
	602	os = "unknown";
	603
	604	arch = fio_get_arch_string(probe->arch);
	605	if (!arch)
	606	os = "unknown";
	607
c71233ee	608	log_info("hostname=%s, be=%u, os=%s, arch=%s, fio=%u.%u.%u\n",
cca84643	609	probe->hostname, probe->bigendian, os, arch, probe->fio_major,
6eb24791	610	probe->fio_minor, probe->fio_patch);
b5296ddb JA	611
	612	if (!client->name)
	613	client->name = strdup((char *) probe->hostname);
2e03b4b2 JA	614	}
2e03b4b2 JA	615
e951bdc4	616	static int handle_client(struct fio_client *client)
37db14fe JA	617	{
	618	struct fio_net_cmd *cmd;
	619
60efd14e JA	620	dprint(FD_NET, "client: handle %s\n", client->hostname);
60efd14e JA	621
e951bdc4 JA	622	cmd = fio_net_recv_cmd(client->fd);
	623	if (!cmd)
	624	return 0;
c2c94585	625
e951bdc4	626	dprint(FD_NET, "client: got cmd op %d from %s\n",
c2c94585	627	cmd->opcode, client->hostname);
46c48f1f	628
e951bdc4 JA	629	switch (cmd->opcode) {
	630	case FIO_NET_CMD_QUIT:
	631	remove_client(client);
	632	free(cmd);
	633	break;
	634	case FIO_NET_CMD_TEXT: {
	635	const char buf = (const char ) cmd->payload;
b5296ddb	636	const char *name;
e951bdc4 JA	637	int fio_unused ret;
e951bdc4 JA	638
b5296ddb JA	639	name = client->name ? client->name : client->hostname;
b5296ddb JA	640
e951bdc4	641	if (!client->skip_newline)
b5296ddb	642	fprintf(f_out, "<%s> ", name);
e951bdc4 JA	643	ret = fwrite(buf, cmd->pdu_len, 1, f_out);
	644	fflush(f_out);
	645	client->skip_newline = strchr(buf, '\n') == NULL;
	646	free(cmd);
	647	break;
37db14fe	648	}
e951bdc4 JA	649	case FIO_NET_CMD_TS:
	650	handle_ts(cmd);
	651	free(cmd);
	652	break;
	653	case FIO_NET_CMD_GS:
	654	handle_gs(cmd);
	655	free(cmd);
	656	break;
	657	case FIO_NET_CMD_ETA:
	658	handle_eta(cmd);
	659	free(cmd);
	660	break;
	661	case FIO_NET_CMD_PROBE:
b5296ddb	662	handle_probe(client, cmd);
e951bdc4 JA	663	free(cmd);
	664	break;
	665	case FIO_NET_CMD_START:
	666	client->state = Client_started;
	667	free(cmd);
	668	break;
	669	case FIO_NET_CMD_STOP:
	670	client->state = Client_stopped;
	671	free(cmd);
	672	break;
	673	default:
	674	log_err("fio: unknown client op: %d\n", cmd->opcode);
	675	free(cmd);
	676	break;
37db14fe JA	677	}
37db14fe JA	678
e951bdc4	679	return 1;
37db14fe	680	}
b66570dc JA	681
	682	int fio_handle_clients(void)
	683	{
	684	struct fio_client *client;
	685	struct flist_head *entry;
	686	struct pollfd *pfds;
82a4be1b	687	int i, ret = 0;
b66570dc JA	688
	689	pfds = malloc(nr_clients * sizeof(struct pollfd));
	690
82a4be1b JA	691	while (!exit_backend && nr_clients) {
	692	i = 0;
	693	flist_for_each(entry, &client_list) {
	694	client = flist_entry(entry, struct fio_client, list);
b66570dc	695
82a4be1b JA	696	pfds[i].fd = client->fd;
	697	pfds[i].events = POLLIN;
	698	i++;
	699	}
	700
	701	assert(i == nr_clients);
b66570dc	702
5c2857f9 JA	703	do {
	704	ret = poll(pfds, nr_clients, 100);
	705	if (ret < 0) {
	706	if (errno == EINTR)
	707	continue;
	708	log_err("fio: poll clients: %s\n", strerror(errno));
	709	break;
	710	} else if (!ret)
b66570dc	711	continue;
5c2857f9	712	} while (ret <= 0);
b66570dc JA	713
	714	for (i = 0; i < nr_clients; i++) {
	715	if (!(pfds[i].revents & POLLIN))
	716	continue;
	717
	718	client = find_client_by_fd(pfds[i].fd);
	719	if (!client) {
3c5f57e3	720	log_err("fio: unknown client fd %d\n", pfds[i].fd);
b66570dc JA	721	continue;
b66570dc JA	722	}
e951bdc4	723	if (!handle_client(client)) {
28d3ab07 JA	724	log_info("client: host=%s disconnected\n",
	725	client->hostname);
	726	remove_client(client);
	727	}
b66570dc JA	728	}
	729	}
	730
	731	free(pfds);
b66570dc JA	732	return 0;
b66570dc JA	733	}