X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=client.c;h=f2c157ae7525a030f6b23c7e9ad15b4032ad5c8d;hp=7f035c7d7804e764e1557c1fee1af1641d971038;hb=85dd01e7d7fa9989bf55002bc416c4d8118fdf5f;hpb=38fdef226f1a1fa053ab53005abbc184143bff65

diff --git a/client.c b/client.c
index 7f035c7d..f2c157ae 100644
--- a/client.c
+++ b/client.c
@@ -16,59 +16,42 @@
 #include <signal.h>
 
 #include "fio.h"
+#include "client.h"
 #include "server.h"
 #include "flist.h"
 #include "hash.h"
 
-struct client_eta {
-	struct jobs_eta eta;
-	unsigned int pending;
-};
-
-struct fio_client {
-	struct flist_head list;
-	struct flist_head hash_list;
-	struct flist_head arg_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;
-
-	struct flist_head eta_list;
-	struct client_eta *eta_in_flight;
-
-	struct flist_head cmd_list;
-
-	uint16_t argc;
-	char **argv;
+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);
+static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
+
+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,
+	.start		= handle_start,
+	.eta		= display_thread_status,
+	.probe		= handle_probe,
+	.eta_msec	= FIO_CLIENT_DEF_ETA_MSEC,
 };
 
 static struct timeval eta_tv;
 
-enum {
-	Client_created		= 0,
-	Client_connected	= 1,
-	Client_started		= 2,
-	Client_stopped		= 3,
-	Client_exited		= 4,
-};
-
 static FLIST_HEAD(client_list);
 static FLIST_HEAD(eta_list);
 
 static FLIST_HEAD(arg_list);
 
-static struct thread_stat client_ts;
-static struct group_run_stats client_gs;
-static int sum_stat_clients;
+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
@@ -76,9 +59,6 @@ static int sum_stat_nr;
 #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 dec_jobs_eta(struct client_eta *eta);
-
 static void fio_client_add_hash(struct fio_client *client)
 {
 	int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
@@ -111,7 +91,7 @@ static struct fio_client *find_client_by_fd(int fd)
 		client = flist_entry(entry, struct fio_client, hash_list);
 
 		if (client->fd == fd)
-			return client;
+			return fio_get_client(client);
 	}
 
 	return NULL;
@@ -119,6 +99,11 @@ static struct fio_client *find_client_by_fd(int fd)
 
 static void remove_client(struct fio_client *client)
 {
+	assert(client->refs);
+
+	if (--client->refs)
+		return;
+
 	dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 	flist_del(&client->list);
 
@@ -126,7 +111,7 @@ static void remove_client(struct fio_client *client)
 
 	if (!flist_empty(&client->eta_list)) {
 		flist_del_init(&client->eta_list);
-		dec_jobs_eta(client->eta_in_flight);
+		fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 	}
 
 	free(client->hostname);
@@ -140,6 +125,17 @@ static void remove_client(struct fio_client *client)
 	sum_stat_clients--;
 }
 
+void fio_put_client(struct fio_client *client)
+{
+	remove_client(client);
+}
+
+struct fio_client *fio_get_client(struct fio_client *client)
+{
+	client->refs++;
+	return client;
+}
+
 static void __fio_client_add_cmd_option(struct fio_client *client,
 					const char *opt)
 {
@@ -171,7 +167,53 @@ void fio_client_add_cmd_option(void *cookie, const char *opt)
 	}
 }
 
-int fio_client_add(const char *hostname, void **cookie)
+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;
@@ -200,10 +242,14 @@ int fio_client_add(const char *hostname, void **cookie)
 
 	if (fio_server_parse_string(hostname, &client->hostname,
 					&client->is_sock, &client->port,
-					&client->addr.sin_addr))
+					&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");
 
@@ -214,25 +260,49 @@ int fio_client_add(const char *hostname, void **cookie)
 	return 0;
 }
 
-static int fio_client_connect_ip(struct fio_client *client)
+static void probe_client(struct fio_client *client)
 {
-	int fd;
+	dprint(FD_NET, "client: send probe\n");
+
+	fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
+}
 
-	client->addr.sin_family = AF_INET;
-	client->addr.sin_port = htons(client->port);
+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(AF_INET, SOCK_STREAM, 0);
+	fd = socket(domain, SOCK_STREAM, 0);
 	if (fd < 0) {
+		int ret = -errno;
+
 		log_err("fio: socket: %s\n", strerror(errno));
-		return -1;
+		return ret;
 	}
 
-	if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
+	if (connect(fd, addr, socklen) < 0) {
+		int ret = -errno;
+
 		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 ret;
 	}
 
 	return fd;
@@ -250,21 +320,25 @@ static int fio_client_connect_sock(struct fio_client *client)
 
 	fd = socket(AF_UNIX, SOCK_STREAM, 0);
 	if (fd < 0) {
+		int ret = -errno;
+
 		log_err("fio: socket: %s\n", strerror(errno));
-		return -1;
+		return ret;
 	}
 
 	len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 	if (connect(fd, (struct sockaddr *) addr, len) < 0) {
+		int ret = -errno;
+
 		log_err("fio: connect; %s\n", strerror(errno));
 		close(fd);
-		return -1;
+		return ret;
 	}
 
 	return fd;
 }
 
-static int fio_client_connect(struct fio_client *client)
+int fio_client_connect(struct fio_client *client)
 {
 	int fd;
 
@@ -278,14 +352,21 @@ static int fio_client_connect(struct fio_client *client)
 	dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 
 	if (fd < 0)
-		return 1;
+		return fd;
 
 	client->fd = fd;
 	fio_client_add_hash(client);
 	client->state = Client_connected;
+
+	probe_client(client);
 	return 0;
 }
 
+void fio_client_terminate(struct fio_client *client)
+{
+	fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
+}
+
 void fio_clients_terminate(void)
 {
 	struct flist_head *entry;
@@ -295,8 +376,7 @@ void fio_clients_terminate(void)
 
 	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);
+		fio_client_terminate(client);
 	}
 }
 
@@ -321,13 +401,6 @@ static void client_signal_handler(void)
 	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, &client->cmd_list);
-}
-
 static int send_client_cmd_line(struct fio_client *client)
 {
 	struct cmd_single_line_pdu *cslp;
@@ -381,6 +454,11 @@ int fio_clients_connect(void)
 	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();
@@ -394,8 +472,6 @@ int fio_clients_connect(void)
 			continue;
 		}
 
-		probe_client(client);
-
 		if (client->argc > 1)
 			send_client_cmd_line(client);
 	}
@@ -403,11 +479,38 @@ int fio_clients_connect(void)
 	return !nr_clients;
 }
 
+int fio_start_client(struct fio_client *client)
+{
+	dprint(FD_NET, "client: start %s\n", client->hostname);
+	return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
+}
+
+int fio_start_all_clients(void)
+{
+	struct fio_client *client;
+	struct flist_head *entry, *tmp;
+	int ret;
+
+	dprint(FD_NET, "client: start all\n");
+
+	flist_for_each_safe(entry, tmp, &client_list) {
+		client = flist_entry(entry, struct fio_client, list);
+
+		ret = fio_start_client(client);
+		if (ret) {
+			remove_client(client);
+			continue;
+		}
+	}
+
+	return flist_empty(&client_list);
+}
+
 /*
  * 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)
+static int __fio_client_send_ini(struct fio_client *client, const char *filename)
 {
 	struct stat sb;
 	char *p, *buf;
@@ -418,14 +521,18 @@ static int fio_client_send_ini(struct fio_client *client, const char *filename)
 
 	fd = open(filename, O_RDONLY);
 	if (fd < 0) {
+		int ret = -errno;
+
 		log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
-		return 1;
+		return ret;
 	}
 
 	if (fstat(fd, &sb) < 0) {
+		int ret = -errno;
+
 		log_err("fio: job file stat: %s\n", strerror(errno));
 		close(fd);
-		return 1;
+		return ret;
 	}
 
 	buf = malloc(sb.st_size);
@@ -453,12 +560,27 @@ static int fio_client_send_ini(struct fio_client *client, const char *filename)
 		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_client_send_ini(struct fio_client *client, const char *filename)
+{
+	int ret;
+
+	ret = __fio_client_send_ini(client, filename);
+	if (ret) {
+		remove_client(client);
+		return ret;
+	}
+
+	client->sent_job = 1;
+	return ret;
+}
+
 int fio_clients_send_ini(const char *filename)
 {
 	struct fio_client *client;
@@ -467,8 +589,7 @@ int fio_clients_send_ini(const char *filename)
 	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);
+		fio_client_send_ini(client, filename);
 	}
 
 	return !nr_clients;
@@ -569,13 +690,10 @@ static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 	dst->groupid	= le32_to_cpu(src->groupid);
 }
 
-static void handle_ts(struct fio_net_cmd *cmd)
+static void handle_ts(struct fio_client *client, 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);
 
 	if (sum_stat_clients == 1)
@@ -593,14 +711,74 @@ static void handle_ts(struct fio_net_cmd *cmd)
 	}
 }
 
-static void handle_gs(struct fio_net_cmd *cmd)
+static void handle_gs(struct fio_client *client, 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 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;
@@ -609,21 +787,22 @@ static void convert_jobs_eta(struct jobs_eta *je)
 	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->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);
 }
 
-static void sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
+void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 {
 	int i;
 
@@ -631,12 +810,12 @@ static void sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 	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->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];
 	}
@@ -645,12 +824,15 @@ static void sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 
 	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 ... */
 }
 
-static void dec_jobs_eta(struct client_eta *eta)
+void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 {
 	if (!--eta->pending) {
-		display_thread_status(&eta->eta);
+		eta_fn(&eta->eta);
 		free(eta);
 	}
 }
@@ -691,15 +873,18 @@ static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 	client->eta_in_flight = NULL;
 	flist_del_init(&client->eta_list);
 
-	convert_jobs_eta(je);
-	sum_jobs_eta(&eta->eta, je);
-	dec_jobs_eta(eta);
+	if (client->ops->jobs_eta)
+		client->ops->jobs_eta(client, je);
+
+	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, *bit;
+	const char *os, *arch;
+	char bit[16];
 
 	os = fio_get_os_string(probe->os);
 	if (!os)
@@ -709,14 +894,7 @@ static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 	if (!arch)
 		os = "unknown";
 
-	if (probe->bpp == 2)
-		bit = "16-bit";
-	else if (probe->bpp == 4)
-		bit = "32-bit";
-	else if (probe->bpp == 8)
-		bit = "64-bit";
-	else
-		bit = "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,
@@ -726,8 +904,40 @@ static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 		client->name = strdup((char *) probe->hostname);
 }
 
-static int handle_client(struct fio_client *client)
+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 = 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;
 
 	dprint(FD_NET, "client: handle %s\n", client->hostname);
@@ -736,53 +946,91 @@ static int handle_client(struct fio_client *client)
 	if (!cmd)
 		return 0;
 
-	dprint(FD_NET, "client: got cmd op %s from %s\n",
-				fio_server_op(cmd->opcode), client->hostname);
+	dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
+		fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
 
 	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: {
-		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;
+	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:
-		handle_ts(cmd);
+	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:
-		handle_gs(cmd);
+		}
+	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:
+		}
+	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);
-		handle_probe(client, cmd);
+		ops->probe(client, cmd);
 		free(cmd);
 		break;
-	case FIO_NET_CMD_START:
-		client->state = Client_started;
+	case FIO_NET_CMD_SERVER_START:
+		client->state = Client_running;
+		if (ops->job_start)
+			ops->job_start(client, cmd);
+		free(cmd);
+		break;
+	case FIO_NET_CMD_START: {
+		struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
+
+		pdu->jobs = le32_to_cpu(pdu->jobs);
+		ops->start(client, cmd);
 		free(cmd);
 		break;
-	case FIO_NET_CMD_STOP:
+		}
+	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;
+		}
+	case FIO_NET_CMD_ADD_JOB:
+		if (ops->add_job)
+			ops->add_job(client, cmd);
 		free(cmd);
 		break;
 	default:
@@ -794,7 +1042,7 @@ static int handle_client(struct fio_client *client)
 	return 1;
 }
 
-static void request_client_etas(void)
+static void request_client_etas(struct client_ops *ops)
 {
 	struct fio_client *client;
 	struct flist_head *entry;
@@ -814,6 +1062,8 @@ static void request_client_etas(void)
 			skipped++;
 			continue;
 		}
+		if (client->state != Client_running)
+			continue;
 
 		assert(!client->eta_in_flight);
 		flist_add_tail(&client->eta_list, &eta_list);
@@ -823,7 +1073,7 @@ static void request_client_etas(void)
 	}
 
 	while (skipped--)
-		dec_jobs_eta(eta);
+		fio_client_dec_jobs_eta(eta, ops->eta);
 
 	dprint(FD_NET, "client: requested eta tag %p\n", eta);
 }
@@ -851,7 +1101,7 @@ static int client_check_cmd_timeout(struct fio_client *client,
 	return flist_empty(&client->cmd_list) && ret;
 }
 
-static int fio_client_timed_out(void)
+static int fio_check_clients_timed_out(void)
 {
 	struct fio_client *client;
 	struct flist_head *entry, *tmp;
@@ -869,7 +1119,11 @@ static int fio_client_timed_out(void)
 		if (!client_check_cmd_timeout(client, &tv))
 			continue;
 
-		log_err("fio: client %s timed out\n", client->hostname);
+		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;
 	}
@@ -877,12 +1131,10 @@ static int fio_client_timed_out(void)
 	return ret;
 }
 
-int fio_handle_clients(void)
+int fio_handle_clients(struct client_ops *ops)
 {
-	struct fio_client *client;
-	struct flist_head *entry;
 	struct pollfd *pfds;
-	int i, ret = 0;
+	int i, ret = 0, retval = 0;
 
 	gettimeofday(&eta_tv, NULL);
 
@@ -893,26 +1145,38 @@ int fio_handle_clients(void)
 	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(entry, &client_list) {
+		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();
+			if (mtime_since(&eta_tv, &tv) >= ops->eta_msec) {
+				request_client_etas(ops);
 				memcpy(&eta_tv, &tv, sizeof(tv));
 
-				if (fio_client_timed_out())
+				if (fio_check_clients_timed_out())
 					break;
 			}
 
@@ -935,14 +1199,17 @@ int fio_handle_clients(void)
 				log_err("fio: unknown client fd %d\n", pfds[i].fd);
 				continue;
 			}
-			if (!handle_client(client)) {
+			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;
+			fio_put_client(client);
 		}
 	}
 
 	free(pfds);
-	return 0;
+	return retval;
 }