client/server: zlib error code fixup
[fio.git] / client.c
index e443dc3eeba3b502c097041a3553c04a3589ca04..678a62753021035568cec1fb54ac1f23e8d7bcca 100644 (file)
--- a/client.c
+++ b/client.c
 #include <arpa/inet.h>
 #include <netdb.h>
 #include <signal.h>
+#include <zlib.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           = 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,
+       .client_type    = FIO_CLIENT_TYPE_CLI,
 };
 
 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 +61,6 @@ 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);
@@ -110,34 +92,55 @@ static struct fio_client *find_client_by_fd(int fd)
        flist_for_each(entry, &client_hash[bucket]) {
                client = flist_entry(entry, struct fio_client, hash_list);
 
-               if (client->fd == fd)
+               if (client->fd == fd) {
+                       client->refs++;
                        return client;
+               }
        }
 
        return NULL;
 }
 
+void fio_put_client(struct fio_client *client)
+{
+       if (--client->refs)
+               return;
+
+       free(client->hostname);
+       if (client->argv)
+               free(client->argv);
+       if (client->name)
+               free(client->name);
+
+       free(client);
+}
+
 static void remove_client(struct fio_client *client)
 {
+       assert(client->refs);
+
        dprint(FD_NET, "client: removed <%s>\n", client->hostname);
-       flist_del(&client->list);
+
+       if (!flist_empty(&client->list))
+               flist_del_init(&client->list);
 
        fio_client_remove_hash(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);
-       if (client->argv)
-               free(client->argv);
-       if (client->name)
-               free(client->name);
-
-       free(client);
        nr_clients--;
        sum_stat_clients--;
+
+       fio_put_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,
@@ -171,7 +174,54 @@ 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;
+       client->type = ops->client_type;
+
+       __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 +250,15 @@ 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;
+       client->type = ops->client_type;
 
        __fio_client_add_cmd_option(client, "fio");
 
@@ -214,25 +269,49 @@ 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");
 
-       client->addr.sin_family = AF_INET;
-       client->addr.sin_port = htons(client->port);
+       fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
+}
 
-       fd = socket(AF_INET, SOCK_STREAM, 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) {
+               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 +329,25 @@ 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 +361,21 @@ 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 +385,7 @@ 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 +410,6 @@ 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;
@@ -370,6 +452,7 @@ static int send_client_cmd_line(struct fio_client *client)
 
        free(lens);
        clp->lines = cpu_to_le16(client->argc);
+       clp->client_type = __cpu_to_le16(client->type);
        ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
        free(pdu);
        return ret;
@@ -381,6 +464,11 @@ 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 +482,6 @@ int fio_clients_connect(void)
                        continue;
                }
 
-               probe_client(client);
-
                if (client->argc > 1)
                        send_client_cmd_line(client);
        }
@@ -403,14 +489,44 @@ 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 cmd_job_pdu *pdu;
+       size_t p_size;
        struct stat sb;
-       char *p, *buf;
+       char *p;
+       void *buf;
        off_t len;
        int fd, ret;
 
@@ -418,17 +534,23 @@ 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);
+       p_size = sb.st_size + sizeof(*pdu);
+       pdu = malloc(p_size);
+       buf = pdu->buf;
 
        len = sb.st_size;
        p = buf;
@@ -453,12 +575,27 @@ static int fio_client_send_ini(struct fio_client *client, const char *filename)
                return 1;
        }
 
-       ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
-       free(buf);
+       pdu->buf_len = __cpu_to_le32(sb.st_size);
+       pdu->client_type = cpu_to_le32(client->type);
+
+       client->sent_job = 1;
+       ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, 0);
+       free(pdu);
        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)
+               client->sent_job = 1;
+
+       return ret;
+}
+
 int fio_clients_send_ini(const char *filename)
 {
        struct fio_client *client;
@@ -569,13 +706,10 @@ 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 +727,74 @@ 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 +803,22 @@ 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 +826,12 @@ 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 +840,15 @@ 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);
        }
 }
@@ -691,9 +889,11 @@ 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)
@@ -720,8 +920,116 @@ 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);
+}
+
+/*
+ * This has been compressed on the server side, since it can be big.
+ * Uncompress here.
+ */
+static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd)
 {
+       struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
+       struct cmd_iolog_pdu *ret;
+       uint32_t nr_samples;
+       unsigned long total;
+       z_stream stream;
+       void *p;
+       int i;
+
+       stream.zalloc = Z_NULL;
+       stream.zfree = Z_NULL;
+       stream.opaque = Z_NULL;
+       stream.avail_in = 0;
+       stream.next_in = Z_NULL;
+
+       if (inflateInit(&stream) != Z_OK)
+               return NULL;
+
+       /*
+        * Get header first, it's not compressed
+        */
+       nr_samples = le32_to_cpu(pdu->nr_samples);
+
+       total = nr_samples * sizeof(struct io_sample);
+       ret = malloc(total + sizeof(*pdu));
+       ret->nr_samples = nr_samples;
+       ret->log_type = le32_to_cpu(pdu->log_type);
+       strcpy((char *) ret->name, (char *) pdu->name);
+
+       p = (void *) ret + sizeof(*pdu);
+
+       stream.avail_in = cmd->pdu_len - sizeof(*pdu);
+       stream.next_in = (void *) pdu + sizeof(*pdu);
+       while (stream.avail_in) {
+               unsigned int this_chunk = 65536;
+               unsigned int this_len;
+               int err;
+
+               if (this_chunk > total)
+                       this_chunk = total;
+
+               stream.avail_out = this_chunk;
+               stream.next_out = p;
+               err = inflate(&stream, Z_NO_FLUSH);
+               /* may be Z_OK, or Z_STREAM_END */
+               if (err < 0) {
+                       log_err("fio: inflate error %d\n", err);
+                       free(ret);
+                       ret = NULL;
+                       goto out;
+               }
+
+               this_len = this_chunk - stream.avail_out;
+               p += this_len;
+               total -= this_len;
+       }
+
+       for (i = 0; i < ret->nr_samples; i++) {
+               struct io_sample *s = &ret->samples[i];
+
+               s->time = le64_to_cpu(s->time);
+               s->val  = le64_to_cpu(s->val);
+               s->ddir = le32_to_cpu(s->ddir);
+               s->bs   = le32_to_cpu(s->bs);
+       }
+
+out:
+       inflateEnd(&stream);
+       return ret;
+}
+
+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);
@@ -730,53 +1038,100 @@ 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, cmd);
                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(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_STOP:
+       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: {
+               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;
+       case FIO_NET_CMD_IOLOG:
+               if (ops->iolog) {
+                       struct cmd_iolog_pdu *pdu;
+
+                       pdu = convert_iolog(cmd);
+                       ops->iolog(client, pdu);
+               }
                free(cmd);
                break;
        default:
@@ -788,7 +1143,7 @@ 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;
@@ -808,6 +1163,8 @@ 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);
@@ -817,7 +1174,7 @@ 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);
 }
@@ -845,7 +1202,7 @@ 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;
@@ -863,7 +1220,11 @@ 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;
        }
@@ -871,12 +1232,10 @@ 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);
 
@@ -887,26 +1246,38 @@ 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;
                        }
 
@@ -929,14 +1300,17 @@ 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;
 }