X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=client.c;h=a77dc9350e0d1d57ffcc2c7f065204b3f9b5b254;hp=f9154648cbbb4c7e1921e57cd7e90cae5e3852e5;hb=5d7793aa2b1dc1044b1918d829a1bcd4c9a19196;hpb=4d8f87806db144552baea60d9b59e9becffe5925

diff --git a/client.c b/client.c
index f9154648..a77dc935 100644
--- a/client.c
+++ b/client.c
@@ -8,87 +8,489 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
-#include <sys/mman.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 "client.h"
 #include "server.h"
-#include "crc/crc32.h"
+#include "flist.h"
+#include "hash.h"
 
-int fio_client_fd = -1;
+static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
+static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
+static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
+static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
+static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
+static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
 
-int fio_client_connect(const char *host)
+struct client_ops fio_client_ops = {
+	.text_op	= handle_text,
+	.disk_util	= handle_du,
+	.thread_status	= handle_ts,
+	.group_stats	= handle_gs,
+	.stop		= handle_stop,
+	.eta		= display_thread_status,
+	.probe		= handle_probe,
+};
+
+static struct timeval eta_tv;
+
+enum {
+	Client_created		= 0,
+	Client_connected	= 1,
+	Client_started		= 2,
+	Client_running		= 3,
+	Client_stopped		= 4,
+	Client_exited		= 5,
+};
+
+static FLIST_HEAD(client_list);
+static FLIST_HEAD(eta_list);
+
+static FLIST_HEAD(arg_list);
+
+struct thread_stat client_ts;
+struct group_run_stats client_gs;
+int sum_stat_clients;
+
+static int sum_stat_nr;
+
+#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 void fio_client_add_hash(struct fio_client *client)
 {
-	struct sockaddr_in addr;
-	int fd;
+	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]);
+}
 
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(fio_net_port);
+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;
 
-	if (inet_aton(host, &addr.sin_addr) != 1) {
-		struct hostent *hent;
+	flist_for_each(entry, &client_hash[bucket]) {
+		client = flist_entry(entry, struct fio_client, hash_list);
 
-		hent = gethostbyname(host);
-		if (!hent) {
-			log_err("fio: gethostbyname: %s\n", strerror(errno));
-			return 1;
+		if (client->fd == fd) {
+			client->refs++;
+			return client;
 		}
+	}
+
+	return NULL;
+}
+
+static void remove_client(struct fio_client *client)
+{
+	assert(client->refs);
 
-		memcpy(&addr.sin_addr, hent->h_addr, 4);
+	if (--client->refs)
+		return;
+
+	dprint(FD_NET, "client: removed <%s>\n", client->hostname);
+	flist_del(&client->list);
+
+	fio_client_remove_hash(client);
+
+	if (!flist_empty(&client->eta_list)) {
+		flist_del_init(&client->eta_list);
+		fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 	}
 
-	fd = socket(AF_INET, SOCK_STREAM, 0);
+	free(client->hostname);
+	if (client->argv)
+		free(client->argv);
+	if (client->name)
+		free(client->name);
+
+	free(client);
+	nr_clients--;
+	sum_stat_clients--;
+}
+
+static void put_client(struct fio_client *client)
+{
+	remove_client(client);
+}
+
+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;
+	struct flist_head *entry;
+
+	if (!client || !opt)
+		return;
+
+	__fio_client_add_cmd_option(client, opt);
+
+	/*
+	 * Duplicate arguments to shared client group
+	 */
+	flist_for_each(entry, &arg_list) {
+		client = flist_entry(entry, struct fio_client, arg_list);
+
+		__fio_client_add_cmd_option(client, opt);
+	}
+}
+
+struct fio_client *fio_client_add_explicit(struct client_ops *ops,
+					   const char *hostname, int type,
+					   int port)
+{
+	struct fio_client *client;
+
+	client = malloc(sizeof(*client));
+	memset(client, 0, sizeof(*client));
+
+	INIT_FLIST_HEAD(&client->list);
+	INIT_FLIST_HEAD(&client->hash_list);
+	INIT_FLIST_HEAD(&client->arg_list);
+	INIT_FLIST_HEAD(&client->eta_list);
+	INIT_FLIST_HEAD(&client->cmd_list);
+
+	client->hostname = strdup(hostname);
+
+	if (type == Fio_client_socket)
+		client->is_sock = 1;
+	else {
+		int ipv6;
+
+		ipv6 = type == Fio_client_ipv6;
+		if (fio_server_parse_host(hostname, &ipv6,
+						&client->addr.sin_addr,
+						&client->addr6.sin6_addr))
+			goto err;
+
+		client->port = port;
+	}
+
+	client->fd = -1;
+	client->ops = ops;
+	client->refs = 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);
+	return client;
+err:
+	free(client);
+	return NULL;
+}
+
+int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
+{
+	struct fio_client *existing = *cookie;
+	struct fio_client *client;
+
+	if (existing) {
+		/*
+		 * We always add our "exec" name as the option, hence 1
+		 * means empty.
+		 */
+		if (existing->argc == 1)
+			flist_add_tail(&existing->arg_list, &arg_list);
+		else {
+			while (!flist_empty(&arg_list))
+				flist_del_init(arg_list.next);
+		}
+	}
+
+	client = malloc(sizeof(*client));
+	memset(client, 0, sizeof(*client));
+
+	INIT_FLIST_HEAD(&client->list);
+	INIT_FLIST_HEAD(&client->hash_list);
+	INIT_FLIST_HEAD(&client->arg_list);
+	INIT_FLIST_HEAD(&client->eta_list);
+	INIT_FLIST_HEAD(&client->cmd_list);
+
+	if (fio_server_parse_string(hostname, &client->hostname,
+					&client->is_sock, &client->port,
+					&client->addr.sin_addr,
+					&client->addr6.sin6_addr,
+					&client->ipv6))
+		return -1;
+
+	client->fd = -1;
+	client->ops = ops;
+	client->refs = 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)
+{
+	struct sockaddr *addr;
+	fio_socklen_t socklen;
+	int fd, domain;
+
+	if (client->ipv6) {
+		client->addr6.sin6_family = AF_INET6;
+		client->addr6.sin6_port = htons(client->port);
+		domain = AF_INET6;
+		addr = (struct sockaddr *) &client->addr6;
+		socklen = sizeof(client->addr6);
+	} else {
+		client->addr.sin_family = AF_INET;
+		client->addr.sin_port = htons(client->port);
+		domain = AF_INET;
+		addr = (struct sockaddr *) &client->addr;
+		socklen = sizeof(client->addr);
+	}
+
+	fd = socket(domain, SOCK_STREAM, 0);
 	if (fd < 0) {
 		log_err("fio: socket: %s\n", strerror(errno));
-		return 1;
+		return -1;
 	}
 
-	if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+	if (connect(fd, addr, socklen) < 0) {
 		log_err("fio: connect: %s\n", strerror(errno));
-		return 1;
+		log_err("fio: failed to connect to %s:%u\n", client->hostname,
+								client->port);
+		close(fd);
+		return -1;
 	}
 
-	fio_client_fd = fd;
+	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);
+
+	dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
+
+	if (fd < 0)
+		return 1;
+
+	client->fd = fd;
+	fio_client_add_hash(client);
+	client->state = Client_connected;
 	return 0;
 }
 
-static int send_file_buf(char *buf, off_t size)
+void fio_clients_terminate(void)
 {
-	struct fio_net_cmd *cmd;
-	int ret;
+	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, NULL);
+	}
+}
+
+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");
 
-	cmd = malloc(sizeof(*cmd) + size);
+	fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
+}
+
+static int send_client_cmd_line(struct fio_client *client)
+{
+	struct cmd_single_line_pdu *cslp;
+	struct cmd_line_pdu *clp;
+	unsigned long offset;
+	unsigned int *lens;
+	void *pdu;
+	size_t mem;
+	int i, ret;
+
+	dprint(FD_NET, "client: send cmdline %d\n", client->argc);
+
+	lens = malloc(client->argc * sizeof(unsigned int));
+
+	/*
+	 * Find out how much mem we need
+	 */
+	for (i = 0, mem = 0; i < client->argc; i++) {
+		lens[i] = strlen(client->argv[i]) + 1;
+		mem += lens[i];
+	}
+
+	/*
+	 * 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);
 
-	fio_init_net_cmd(cmd, FIO_NET_CMD_JOB_END, buf, size);
-	fio_net_cmd_crc(cmd);
+	for (i = 0; i < client->argc; i++) {
+		uint16_t arg_len = lens[i];
 
-	ret = fio_send_data(fio_client_fd, cmd, sizeof(*cmd) + size);
-	free(cmd);
+		cslp = pdu + offset;
+		strcpy((char *) cslp->text, client->argv[i]);
+		cslp->len = cpu_to_le16(arg_len);
+		offset += sizeof(*cslp) + arg_len;
+	}
+
+	free(lens);
+	clp->lines = cpu_to_le16(client->argc);
+	ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
+	free(pdu);
 	return ret;
 }
 
+int fio_clients_connect(void)
+{
+	struct fio_client *client;
+	struct flist_head *entry, *tmp;
+	int ret;
+
+#ifdef WIN32
+	WSADATA wsd;
+	WSAStartup(MAKEWORD(2,2), &wsd);
+#endif
+
+	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.
  */
-int fio_client_send_ini(const char *filename)
+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 open: %s\n", strerror(errno));
+		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;
 	}
 
@@ -110,33 +512,643 @@ int fio_client_send_ini(const char *filename)
 			continue;
 	} while (1);
 
-	ret = send_file_buf(buf, sb.st_size);
+	if (len) {
+		log_err("fio: failed reading job file %s\n", filename);
+		close(fd);
+		free(buf);
+		return 1;
+	}
+
+	client->sent_job = 1;
+	ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 	free(buf);
+	close(fd);
 	return ret;
 }
 
-int fio_handle_clients(void)
+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);
+
+		client->sent_job = 1;
+	}
+
+	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_client *client, struct fio_net_cmd *cmd)
 {
+	struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
+
+	show_thread_status(&p->ts, &p->rs);
+
+	if (sum_stat_clients == 1)
+		return;
+
+	sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
+	sum_group_stats(&client_gs, &p->rs);
+
+	client_ts.members++;
+	client_ts.groupid = p->ts.groupid;
+
+	if (++sum_stat_nr == sum_stat_clients) {
+		strcpy(client_ts.name, "All clients");
+		show_thread_status(&client_ts, &client_gs);
+	}
+}
+
+static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
+
+	show_group_stats(gs);
+}
+
+static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
+	const char *buf = (const char *) pdu->buf;
+	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, pdu->buf_len, 1, f_out);
+	fflush(f_out);
+	client->skip_newline = strchr(buf, '\n') == NULL;
+}
+
+static void convert_agg(struct disk_util_agg *agg)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		agg->ios[i]	= le32_to_cpu(agg->ios[i]);
+		agg->merges[i]	= le32_to_cpu(agg->merges[i]);
+		agg->sectors[i]	= le64_to_cpu(agg->sectors[i]);
+		agg->ticks[i]	= le32_to_cpu(agg->ticks[i]);
+	}
+
+	agg->io_ticks		= le32_to_cpu(agg->io_ticks);
+	agg->time_in_queue	= le32_to_cpu(agg->time_in_queue);
+	agg->slavecount		= le32_to_cpu(agg->slavecount);
+	agg->max_util.u.f	= fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
+}
+
+static void convert_dus(struct disk_util_stat *dus)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		dus->ios[i]	= le32_to_cpu(dus->ios[i]);
+		dus->merges[i]	= le32_to_cpu(dus->merges[i]);
+		dus->sectors[i]	= le64_to_cpu(dus->sectors[i]);
+		dus->ticks[i]	= le32_to_cpu(dus->ticks[i]);
+	}
+
+	dus->io_ticks		= le32_to_cpu(dus->io_ticks);
+	dus->time_in_queue	= le32_to_cpu(dus->time_in_queue);
+	dus->msec		= le64_to_cpu(dus->msec);
+}
+
+static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
+
+	if (!client->disk_stats_shown) {
+		client->disk_stats_shown = 1;
+		log_info("\nDisk stats (read/write):\n");
+	}
+
+	print_disk_util(&du->dus, &du->agg, terse_output);
+}
+
+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);
+
+	for (i = 0; i < 2; i++) {
+		je->m_rate[i]		= le32_to_cpu(je->m_rate[i]);
+		je->t_rate[i]		= le32_to_cpu(je->t_rate[i]);
+		je->m_iops[i]		= le32_to_cpu(je->m_iops[i]);
+		je->t_iops[i]		= le32_to_cpu(je->t_iops[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);
+	je->nr_threads		= le32_to_cpu(je->nr_threads);
+}
+
+void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
+{
+	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;
+
+	for (i = 0; i < 2; i++) {
+		dst->m_rate[i]	+= je->m_rate[i];
+		dst->t_rate[i]	+= je->t_rate[i];
+		dst->m_iops[i]	+= je->m_iops[i];
+		dst->t_iops[i]	+= je->t_iops[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;
+
+	dst->nr_threads		+= je->nr_threads;
+	/* we need to handle je->run_str too ... */
+}
+
+void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
+{
+	if (!--eta->pending) {
+		eta_fn(&eta->eta);
+		free(eta);
+	}
+}
+
+static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	struct fio_net_int_cmd *icmd = NULL;
+	struct flist_head *entry;
+
+	flist_for_each(entry, &client->cmd_list) {
+		icmd = flist_entry(entry, struct fio_net_int_cmd, list);
+
+		if (cmd->tag == (uintptr_t) icmd)
+			break;
+
+		icmd = NULL;
+	}
+
+	if (!icmd) {
+		log_err("fio: client: unable to find matching tag\n");
+		return;
+	}
+
+	flist_del(&icmd->list);
+	cmd->tag = icmd->saved_tag;
+	free(icmd);
+}
+
+static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
+	struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
+
+	dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
+
+	assert(client->eta_in_flight == eta);
+
+	client->eta_in_flight = NULL;
+	flist_del_init(&client->eta_list);
+
+	fio_client_sum_jobs_eta(&eta->eta, je);
+	fio_client_dec_jobs_eta(eta, client->ops->eta);
+}
+
+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;
+	char bit[16];
+
+	os = fio_get_os_string(probe->os);
+	if (!os)
+		os = "unknown";
+
+	arch = fio_get_arch_string(probe->arch);
+	if (!arch)
+		os = "unknown";
+
+	sprintf(bit, "%d-bit", probe->bpp * 8);
+
+	log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
+		probe->hostname, probe->bigendian, bit, os, arch,
+		probe->fio_major, probe->fio_minor, probe->fio_patch);
+
+	if (!client->name)
+		client->name = strdup((char *) probe->hostname);
+}
+
+static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
+
+	client->state = Client_started;
+	client->jobs = le32_to_cpu(pdu->jobs);
+}
+
+static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
+{
+	if (client->error)
+		log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
+}
+
+static void convert_stop(struct fio_net_cmd *cmd)
+{
+	struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
+
+	pdu->error = le32_to_cpu(pdu->error);
+}
+
+static void convert_text(struct fio_net_cmd *cmd)
+{
+	struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
+
+	pdu->level	= le32_to_cpu(pdu->level);
+	pdu->buf_len	= le32_to_cpu(pdu->buf_len);
+	pdu->log_sec	= le64_to_cpu(pdu->log_sec);
+	pdu->log_usec	= le64_to_cpu(pdu->log_usec);
+}
+
+int fio_handle_client(struct fio_client *client)
+{
+	struct client_ops *ops = client->ops;
 	struct fio_net_cmd *cmd;
 
-	while (!exit_backend) {
-		cmd = fio_net_cmd_read(fio_client_fd);
-		if (!cmd)
-			continue;
+	dprint(FD_NET, "client: handle %s\n", client->hostname);
 
-		if (cmd->opcode == FIO_NET_CMD_ACK) {
-			free(cmd);
-			continue;
+	cmd = fio_net_recv_cmd(client->fd);
+	if (!cmd)
+		return 0;
+
+	dprint(FD_NET, "client: got cmd op %s from %s\n",
+				fio_server_op(cmd->opcode), client->hostname);
+
+	switch (cmd->opcode) {
+	case FIO_NET_CMD_QUIT:
+		if (ops->quit)
+			ops->quit(client);
+		remove_client(client);
+		free(cmd);
+		break;
+	case FIO_NET_CMD_TEXT:
+		convert_text(cmd);
+		ops->text_op(client, cmd);
+		free(cmd);
+		break;
+	case FIO_NET_CMD_DU: {
+		struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
+
+		convert_dus(&du->dus);
+		convert_agg(&du->agg);
+
+		ops->disk_util(client, cmd);
+		free(cmd);
+		break;
+		}
+	case FIO_NET_CMD_TS: {
+		struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
+
+		convert_ts(&p->ts, &p->ts);
+		convert_gs(&p->rs, &p->rs);
+
+		ops->thread_status(client, cmd);
+		free(cmd);
+		break;
+		}
+	case FIO_NET_CMD_GS: {
+		struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
+
+		convert_gs(gs, gs);
+
+		ops->group_stats(client, cmd);
+		free(cmd);
+		break;
+		}
+	case FIO_NET_CMD_ETA: {
+		struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
+
+		remove_reply_cmd(client, cmd);
+		convert_jobs_eta(je);
+		handle_eta(client, cmd);
+		free(cmd);
+		break;
+		}
+	case FIO_NET_CMD_PROBE:
+		remove_reply_cmd(client, cmd);
+		ops->probe(client, cmd);
+		free(cmd);
+		break;
+	case FIO_NET_CMD_SERVER_START:
+		client->state = Client_running;
+		free(cmd);
+		break;
+	case FIO_NET_CMD_START:
+		handle_start(client, cmd);
+		free(cmd);
+		break;
+	case FIO_NET_CMD_STOP: {
+		struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
+
+		convert_stop(cmd);
+		client->state = Client_stopped;
+		client->error = pdu->error;
+		ops->stop(client, cmd);
+		free(cmd);
+		break;
 		}
-		if (cmd->opcode != FIO_NET_CMD_TEXT) {
-			printf("non text: %d\n", cmd->opcode);
-			free(cmd);
+	case FIO_NET_CMD_ADD_JOB:
+		if (ops->add_job)
+			ops->add_job(client, cmd);
+		free(cmd);
+		break;
+	default:
+		log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
+		free(cmd);
+		break;
+	}
+
+	return 1;
+}
+
+static void request_client_etas(struct client_ops *ops)
+{
+	struct fio_client *client;
+	struct flist_head *entry;
+	struct client_eta *eta;
+	int skipped = 0;
+
+	dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
+
+	eta = malloc(sizeof(*eta));
+	memset(&eta->eta, 0, sizeof(eta->eta));
+	eta->pending = nr_clients;
+
+	flist_for_each(entry, &client_list) {
+		client = flist_entry(entry, struct fio_client, list);
+
+		if (!flist_empty(&client->eta_list)) {
+			skipped++;
 			continue;
 		}
-		printf("%s", cmd->payload);
-		fflush(stdout);
+		if (client->state != Client_running)
+			continue;
+
+		assert(!client->eta_in_flight);
+		flist_add_tail(&client->eta_list, &eta_list);
+		client->eta_in_flight = eta;
+		fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
+					(uintptr_t) eta, &client->cmd_list);
+	}
+
+	while (skipped--)
+		fio_client_dec_jobs_eta(eta, ops->eta);
+
+	dprint(FD_NET, "client: requested eta tag %p\n", eta);
+}
+
+static int client_check_cmd_timeout(struct fio_client *client,
+				    struct timeval *now)
+{
+	struct fio_net_int_cmd *cmd;
+	struct flist_head *entry, *tmp;
+	int ret = 0;
+
+	flist_for_each_safe(entry, tmp, &client->cmd_list) {
+		cmd = flist_entry(entry, struct fio_net_int_cmd, list);
+
+		if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
+			continue;
+
+		log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
+						fio_server_op(cmd->cmd.opcode));
+		flist_del(&cmd->list);
 		free(cmd);
+		ret = 1;
 	}
 
-	return 0;
+	return flist_empty(&client->cmd_list) && ret;
+}
+
+static int fio_check_clients_timed_out(void)
+{
+	struct fio_client *client;
+	struct flist_head *entry, *tmp;
+	struct timeval tv;
+	int ret = 0;
+
+	gettimeofday(&tv, NULL);
+
+	flist_for_each_safe(entry, tmp, &client_list) {
+		client = flist_entry(entry, struct fio_client, list);
+
+		if (flist_empty(&client->cmd_list))
+			continue;
+
+		if (!client_check_cmd_timeout(client, &tv))
+			continue;
+
+		if (client->ops->timed_out)
+			client->ops->timed_out(client);
+		else
+			log_err("fio: client %s timed out\n", client->hostname);
+
+		remove_client(client);
+		ret = 1;
+	}
+
+	return ret;
+}
+
+int fio_handle_clients(struct client_ops *ops)
+{
+	struct pollfd *pfds;
+	int i, ret = 0, retval = 0;
+
+	gettimeofday(&eta_tv, NULL);
+
+	pfds = malloc(nr_clients * sizeof(struct pollfd));
+
+	sum_stat_clients = nr_clients;
+	init_thread_stat(&client_ts);
+	init_group_run_stat(&client_gs);
+
+	while (!exit_backend && nr_clients) {
+		struct flist_head *entry, *tmp;
+		struct fio_client *client;
+
+		i = 0;
+		flist_for_each_safe(entry, tmp, &client_list) {
+			client = flist_entry(entry, struct fio_client, list);
+
+			if (!client->sent_job && !client->ops->stay_connected &&
+			    flist_empty(&client->cmd_list)) {
+				remove_client(client);
+				continue;
+			}
+
+			pfds[i].fd = client->fd;
+			pfds[i].events = POLLIN;
+			i++;
+		}
+
+		if (!nr_clients)
+			break;
+
+		assert(i == nr_clients);
+
+		do {
+			struct timeval tv;
+
+			gettimeofday(&tv, NULL);
+			if (mtime_since(&eta_tv, &tv) >= 900) {
+				request_client_etas(ops);
+				memcpy(&eta_tv, &tv, sizeof(tv));
+
+				if (fio_check_clients_timed_out())
+					break;
+			}
+
+			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 (!fio_handle_client(client)) {
+				log_info("client: host=%s disconnected\n",
+						client->hostname);
+				remove_client(client);
+				retval = 1;
+			} else if (client->error)
+				retval = 1;
+			put_client(client);
+		}
+	}
+
+	free(pfds);
+	return retval;
 }