client.c

   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>
  11 #include <sys/socket.h>
  12 #include <sys/un.h>
  13 #include <netinet/in.h>
  14 #include <arpa/inet.h>
  15 #include <netdb.h>
  16 #include <signal.h>
  17 #include <zlib.h>
  18
  19 #include "fio.h"
  20 #include "client.h"
  21 #include "server.h"
  22 #include "flist.h"
  23 #include "hash.h"
  24
  25 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  26 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  31 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  32
  33 struct client_ops fio_client_ops = {
  34         .text           = handle_text,
  35         .disk_util      = handle_du,
  36         .thread_status  = handle_ts,
  37         .group_stats    = handle_gs,
  38         .stop           = handle_stop,
  39         .start          = handle_start,
  40         .eta            = display_thread_status,
  41         .probe          = handle_probe,
  42         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  43         .client_type    = FIO_CLIENT_TYPE_CLI,
  44 };
  45
  46 static struct timeval eta_tv;
  47
  48 static FLIST_HEAD(client_list);
  49 static FLIST_HEAD(eta_list);
  50
  51 static FLIST_HEAD(arg_list);
  52
  53 struct thread_stat client_ts;
  54 struct group_run_stats client_gs;
  55 int sum_stat_clients;
  56
  57 static int sum_stat_nr;
  58
  59 #define FIO_CLIENT_HASH_BITS    7
  60 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  61 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  62 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  63
  64 static void fio_client_add_hash(struct fio_client *client)
  65 {
  66         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  67
  68         bucket &= FIO_CLIENT_HASH_MASK;
  69         flist_add(&client->hash_list, &client_hash[bucket]);
  70 }
  71
  72 static void fio_client_remove_hash(struct fio_client *client)
  73 {
  74         if (!flist_empty(&client->hash_list))
  75                 flist_del_init(&client->hash_list);
  76 }
  77
  78 static void fio_init fio_client_hash_init(void)
  79 {
  80         int i;
  81
  82         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  83                 INIT_FLIST_HEAD(&client_hash[i]);
  84 }
  85
  86 static struct fio_client *find_client_by_fd(int fd)
  87 {
  88         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  89         struct fio_client *client;
  90         struct flist_head *entry;
  91
  92         flist_for_each(entry, &client_hash[bucket]) {
  93                 client = flist_entry(entry, struct fio_client, hash_list);
  94
  95                 if (client->fd == fd) {
  96                         client->refs++;
  97                         return client;
  98                 }
  99         }
 100
 101         return NULL;
 102 }
 103
 104 void fio_put_client(struct fio_client *client)
 105 {
 106         if (--client->refs)
 107                 return;
 108
 109         free(client->hostname);
 110         if (client->argv)
 111                 free(client->argv);
 112         if (client->name)
 113                 free(client->name);
 114         while (client->nr_ini_file)
 115                 free(client->ini_file[--client->nr_ini_file]);
 116         if (client->ini_file)
 117                 free(client->ini_file);
 118
 119         free(client);
 120 }
 121
 122 static void remove_client(struct fio_client *client)
 123 {
 124         assert(client->refs);
 125
 126         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 127
 128         if (!flist_empty(&client->list))
 129                 flist_del_init(&client->list);
 130
 131         fio_client_remove_hash(client);
 132
 133         if (!flist_empty(&client->eta_list)) {
 134                 flist_del_init(&client->eta_list);
 135                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 136         }
 137
 138         close(client->fd);
 139         client->fd = -1;
 140
 141         if (client->ops->removed)
 142                 client->ops->removed(client);
 143
 144         nr_clients--;
 145         sum_stat_clients--;
 146
 147         fio_put_client(client);
 148 }
 149
 150 struct fio_client *fio_get_client(struct fio_client *client)
 151 {
 152         client->refs++;
 153         return client;
 154 }
 155
 156 static void __fio_client_add_cmd_option(struct fio_client *client,
 157                                         const char *opt)
 158 {
 159         int index;
 160
 161         index = client->argc++;
 162         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 163         client->argv[index] = strdup(opt);
 164         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 165 }
 166
 167 void fio_client_add_cmd_option(void *cookie, const char *opt)
 168 {
 169         struct fio_client *client = cookie;
 170         struct flist_head *entry;
 171
 172         if (!client || !opt)
 173                 return;
 174
 175         __fio_client_add_cmd_option(client, opt);
 176
 177         /*
 178          * Duplicate arguments to shared client group
 179          */
 180         flist_for_each(entry, &arg_list) {
 181                 client = flist_entry(entry, struct fio_client, arg_list);
 182
 183                 __fio_client_add_cmd_option(client, opt);
 184         }
 185 }
 186
 187 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 188                                            const char *hostname, int type,
 189                                            int port)
 190 {
 191         struct fio_client *client;
 192
 193         client = malloc(sizeof(*client));
 194         memset(client, 0, sizeof(*client));
 195
 196         INIT_FLIST_HEAD(&client->list);
 197         INIT_FLIST_HEAD(&client->hash_list);
 198         INIT_FLIST_HEAD(&client->arg_list);
 199         INIT_FLIST_HEAD(&client->eta_list);
 200         INIT_FLIST_HEAD(&client->cmd_list);
 201
 202         client->hostname = strdup(hostname);
 203
 204         if (type == Fio_client_socket)
 205                 client->is_sock = 1;
 206         else {
 207                 int ipv6;
 208
 209                 ipv6 = type == Fio_client_ipv6;
 210                 if (fio_server_parse_host(hostname, &ipv6,
 211                                                 &client->addr.sin_addr,
 212                                                 &client->addr6.sin6_addr))
 213                         goto err;
 214
 215                 client->port = port;
 216         }
 217
 218         client->fd = -1;
 219         client->ops = ops;
 220         client->refs = 1;
 221         client->type = ops->client_type;
 222
 223         __fio_client_add_cmd_option(client, "fio");
 224
 225         flist_add(&client->list, &client_list);
 226         nr_clients++;
 227         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 228         return client;
 229 err:
 230         free(client);
 231         return NULL;
 232 }
 233
 234 void fio_client_add_ini_file(void *cookie, const char *ini_file)
 235 {
 236         struct fio_client *client = cookie;
 237         size_t new_size;
 238
 239         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 240
 241         new_size = (client->nr_ini_file + 1) * sizeof(char *);
 242         client->ini_file = realloc(client->ini_file, new_size);
 243         client->ini_file[client->nr_ini_file] = strdup(ini_file);
 244         client->nr_ini_file++;
 245 }
 246
 247 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 248 {
 249         struct fio_client *existing = *cookie;
 250         struct fio_client *client;
 251
 252         if (existing) {
 253                 /*
 254                  * We always add our "exec" name as the option, hence 1
 255                  * means empty.
 256                  */
 257                 if (existing->argc == 1)
 258                         flist_add_tail(&existing->arg_list, &arg_list);
 259                 else {
 260                         while (!flist_empty(&arg_list))
 261                                 flist_del_init(arg_list.next);
 262                 }
 263         }
 264
 265         client = malloc(sizeof(*client));
 266         memset(client, 0, sizeof(*client));
 267
 268         INIT_FLIST_HEAD(&client->list);
 269         INIT_FLIST_HEAD(&client->hash_list);
 270         INIT_FLIST_HEAD(&client->arg_list);
 271         INIT_FLIST_HEAD(&client->eta_list);
 272         INIT_FLIST_HEAD(&client->cmd_list);
 273
 274         if (fio_server_parse_string(hostname, &client->hostname,
 275                                         &client->is_sock, &client->port,
 276                                         &client->addr.sin_addr,
 277                                         &client->addr6.sin6_addr,
 278                                         &client->ipv6))
 279                 return -1;
 280
 281         client->fd = -1;
 282         client->ops = ops;
 283         client->refs = 1;
 284         client->type = ops->client_type;
 285
 286         __fio_client_add_cmd_option(client, "fio");
 287
 288         flist_add(&client->list, &client_list);
 289         nr_clients++;
 290         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 291         *cookie = client;
 292         return 0;
 293 }
 294
 295 static void probe_client(struct fio_client *client)
 296 {
 297         dprint(FD_NET, "client: send probe\n");
 298
 299         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 300 }
 301
 302 static int fio_client_connect_ip(struct fio_client *client)
 303 {
 304         struct sockaddr *addr;
 305         fio_socklen_t socklen;
 306         int fd, domain;
 307
 308         if (client->ipv6) {
 309                 client->addr6.sin6_family = AF_INET6;
 310                 client->addr6.sin6_port = htons(client->port);
 311                 domain = AF_INET6;
 312                 addr = (struct sockaddr *) &client->addr6;
 313                 socklen = sizeof(client->addr6);
 314         } else {
 315                 client->addr.sin_family = AF_INET;
 316                 client->addr.sin_port = htons(client->port);
 317                 domain = AF_INET;
 318                 addr = (struct sockaddr *) &client->addr;
 319                 socklen = sizeof(client->addr);
 320         }
 321
 322         fd = socket(domain, SOCK_STREAM, 0);
 323         if (fd < 0) {
 324                 int ret = -errno;
 325
 326                 log_err("fio: socket: %s\n", strerror(errno));
 327                 return ret;
 328         }
 329
 330         if (connect(fd, addr, socklen) < 0) {
 331                 int ret = -errno;
 332
 333                 log_err("fio: connect: %s\n", strerror(errno));
 334                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 335                                                                 client->port);
 336                 close(fd);
 337                 return ret;
 338         }
 339
 340         return fd;
 341 }
 342
 343 static int fio_client_connect_sock(struct fio_client *client)
 344 {
 345         struct sockaddr_un *addr = &client->addr_un;
 346         fio_socklen_t len;
 347         int fd;
 348
 349         memset(addr, 0, sizeof(*addr));
 350         addr->sun_family = AF_UNIX;
 351         strcpy(addr->sun_path, client->hostname);
 352
 353         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 354         if (fd < 0) {
 355                 int ret = -errno;
 356
 357                 log_err("fio: socket: %s\n", strerror(errno));
 358                 return ret;
 359         }
 360
 361         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 362         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 363                 int ret = -errno;
 364
 365                 log_err("fio: connect; %s\n", strerror(errno));
 366                 close(fd);
 367                 return ret;
 368         }
 369
 370         return fd;
 371 }
 372
 373 int fio_client_connect(struct fio_client *client)
 374 {
 375         int fd;
 376
 377         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 378
 379         if (client->is_sock)
 380                 fd = fio_client_connect_sock(client);
 381         else
 382                 fd = fio_client_connect_ip(client);
 383
 384         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 385
 386         if (fd < 0)
 387                 return fd;
 388
 389         client->fd = fd;
 390         fio_client_add_hash(client);
 391         client->state = Client_connected;
 392
 393         probe_client(client);
 394         return 0;
 395 }
 396
 397 int fio_client_terminate(struct fio_client *client)
 398 {
 399         return fio_net_send_quit(client->fd);
 400 }
 401
 402 void fio_clients_terminate(void)
 403 {
 404         struct flist_head *entry;
 405         struct fio_client *client;
 406
 407         dprint(FD_NET, "client: terminate clients\n");
 408
 409         flist_for_each(entry, &client_list) {
 410                 client = flist_entry(entry, struct fio_client, list);
 411                 fio_client_terminate(client);
 412         }
 413 }
 414
 415 static void sig_int(int sig)
 416 {
 417         dprint(FD_NET, "client: got signal %d\n", sig);
 418         fio_clients_terminate();
 419 }
 420
 421 static void sig_show_status(int sig)
 422 {
 423         show_running_run_stats();
 424 }
 425
 426 static void client_signal_handler(void)
 427 {
 428         struct sigaction act;
 429
 430         memset(&act, 0, sizeof(act));
 431         act.sa_handler = sig_int;
 432         act.sa_flags = SA_RESTART;
 433         sigaction(SIGINT, &act, NULL);
 434
 435         memset(&act, 0, sizeof(act));
 436         act.sa_handler = sig_int;
 437         act.sa_flags = SA_RESTART;
 438         sigaction(SIGTERM, &act, NULL);
 439
 440         memset(&act, 0, sizeof(act));
 441         act.sa_handler = sig_show_status;
 442         act.sa_flags = SA_RESTART;
 443         sigaction(SIGUSR1, &act, NULL);
 444 }
 445
 446 static int send_client_cmd_line(struct fio_client *client)
 447 {
 448         struct cmd_single_line_pdu *cslp;
 449         struct cmd_line_pdu *clp;
 450         unsigned long offset;
 451         unsigned int *lens;
 452         void *pdu;
 453         size_t mem;
 454         int i, ret;
 455
 456         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 457
 458         lens = malloc(client->argc * sizeof(unsigned int));
 459
 460         /*
 461          * Find out how much mem we need
 462          */
 463         for (i = 0, mem = 0; i < client->argc; i++) {
 464                 lens[i] = strlen(client->argv[i]) + 1;
 465                 mem += lens[i];
 466         }
 467
 468         /*
 469          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 470          */
 471         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 472
 473         pdu = malloc(mem);
 474         clp = pdu;
 475         offset = sizeof(*clp);
 476
 477         for (i = 0; i < client->argc; i++) {
 478                 uint16_t arg_len = lens[i];
 479
 480                 cslp = pdu + offset;
 481                 strcpy((char *) cslp->text, client->argv[i]);
 482                 cslp->len = cpu_to_le16(arg_len);
 483                 offset += sizeof(*cslp) + arg_len;
 484         }
 485
 486         free(lens);
 487         clp->lines = cpu_to_le16(client->argc);
 488         clp->client_type = __cpu_to_le16(client->type);
 489         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 490         free(pdu);
 491         return ret;
 492 }
 493
 494 int fio_clients_connect(void)
 495 {
 496         struct fio_client *client;
 497         struct flist_head *entry, *tmp;
 498         int ret;
 499
 500 #ifdef WIN32
 501         WSADATA wsd;
 502         WSAStartup(MAKEWORD(2, 2), &wsd);
 503 #endif
 504
 505         dprint(FD_NET, "client: connect all\n");
 506
 507         client_signal_handler();
 508
 509         flist_for_each_safe(entry, tmp, &client_list) {
 510                 client = flist_entry(entry, struct fio_client, list);
 511
 512                 ret = fio_client_connect(client);
 513                 if (ret) {
 514                         remove_client(client);
 515                         continue;
 516                 }
 517
 518                 if (client->argc > 1)
 519                         send_client_cmd_line(client);
 520         }
 521
 522         return !nr_clients;
 523 }
 524
 525 int fio_start_client(struct fio_client *client)
 526 {
 527         dprint(FD_NET, "client: start %s\n", client->hostname);
 528         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 529 }
 530
 531 int fio_start_all_clients(void)
 532 {
 533         struct fio_client *client;
 534         struct flist_head *entry, *tmp;
 535         int ret;
 536
 537         dprint(FD_NET, "client: start all\n");
 538
 539         flist_for_each_safe(entry, tmp, &client_list) {
 540                 client = flist_entry(entry, struct fio_client, list);
 541
 542                 ret = fio_start_client(client);
 543                 if (ret) {
 544                         remove_client(client);
 545                         continue;
 546                 }
 547         }
 548
 549         return flist_empty(&client_list);
 550 }
 551
 552 /*
 553  * Send file contents to server backend. We could use sendfile(), but to remain
 554  * more portable lets just read/write the darn thing.
 555  */
 556 static int __fio_client_send_ini(struct fio_client *client, const char *filename)
 557 {
 558         struct cmd_job_pdu *pdu;
 559         size_t p_size;
 560         struct stat sb;
 561         char *p;
 562         void *buf;
 563         off_t len;
 564         int fd, ret;
 565
 566         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 567
 568         fd = open(filename, O_RDONLY);
 569         if (fd < 0) {
 570                 int ret = -errno;
 571
 572                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 573                 return ret;
 574         }
 575
 576         if (fstat(fd, &sb) < 0) {
 577                 int ret = -errno;
 578
 579                 log_err("fio: job file stat: %s\n", strerror(errno));
 580                 close(fd);
 581                 return ret;
 582         }
 583
 584         p_size = sb.st_size + sizeof(*pdu);
 585         pdu = malloc(p_size);
 586         buf = pdu->buf;
 587
 588         len = sb.st_size;
 589         p = buf;
 590         do {
 591                 ret = read(fd, p, len);
 592                 if (ret > 0) {
 593                         len -= ret;
 594                         if (!len)
 595                                 break;
 596                         p += ret;
 597                         continue;
 598                 } else if (!ret)
 599                         break;
 600                 else if (errno == EAGAIN || errno == EINTR)
 601                         continue;
 602         } while (1);
 603
 604         if (len) {
 605                 log_err("fio: failed reading job file %s\n", filename);
 606                 close(fd);
 607                 free(buf);
 608                 return 1;
 609         }
 610
 611         pdu->buf_len = __cpu_to_le32(sb.st_size);
 612         pdu->client_type = cpu_to_le32(client->type);
 613
 614         client->sent_job = 1;
 615         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 616         free(pdu);
 617         close(fd);
 618         return ret;
 619 }
 620
 621 int fio_client_send_ini(struct fio_client *client, const char *filename)
 622 {
 623         int ret;
 624
 625         ret = __fio_client_send_ini(client, filename);
 626         if (!ret)
 627                 client->sent_job = 1;
 628
 629         return ret;
 630 }
 631
 632 int fio_clients_send_ini(const char *filename)
 633 {
 634         struct fio_client *client;
 635         struct flist_head *entry, *tmp;
 636
 637         flist_for_each_safe(entry, tmp, &client_list) {
 638                 client = flist_entry(entry, struct fio_client, list);
 639
 640                 if (client->nr_ini_file) {
 641                         int i;
 642
 643                         for (i = 0; i < client->nr_ini_file; i++) {
 644                                 const char *ini = client->ini_file[i];
 645
 646                                 if (fio_client_send_ini(client, ini)) {
 647                                         remove_client(client);
 648                                         break;
 649                                 }
 650                         }
 651                 } else if (!filename || fio_client_send_ini(client, filename))
 652                         remove_client(client);
 653         }
 654
 655         return !nr_clients;
 656 }
 657
 658 int fio_client_update_options(struct fio_client *client,
 659                               struct thread_options *o, uint64_t *tag)
 660 {
 661         struct cmd_add_job_pdu pdu;
 662
 663         pdu.thread_number = cpu_to_le32(client->thread_number);
 664         pdu.groupid = cpu_to_le32(client->groupid);
 665         convert_thread_options_to_net(&pdu.top, o);
 666
 667         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 668 }
 669
 670 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 671 {
 672         dst->max_val    = le64_to_cpu(src->max_val);
 673         dst->min_val    = le64_to_cpu(src->min_val);
 674         dst->samples    = le64_to_cpu(src->samples);
 675
 676         /*
 677          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 678          */
 679         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 680         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 681 }
 682
 683 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 684 {
 685         int i, j;
 686
 687         dst->error              = le32_to_cpu(src->error);
 688         dst->thread_number      = le32_to_cpu(src->thread_number);
 689         dst->groupid            = le32_to_cpu(src->groupid);
 690         dst->pid                = le32_to_cpu(src->pid);
 691         dst->members            = le32_to_cpu(src->members);
 692
 693         for (i = 0; i < 2; i++) {
 694                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 695                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 696                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 697                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 698         }
 699
 700         dst->usr_time           = le64_to_cpu(src->usr_time);
 701         dst->sys_time           = le64_to_cpu(src->sys_time);
 702         dst->ctx                = le64_to_cpu(src->ctx);
 703         dst->minf               = le64_to_cpu(src->minf);
 704         dst->majf               = le64_to_cpu(src->majf);
 705         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 706
 707         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 708                 fio_fp64_t *fps = &src->percentile_list[i];
 709                 fio_fp64_t *fpd = &dst->percentile_list[i];
 710
 711                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 712         }
 713
 714         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 715                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 716                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 717                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 718         }
 719
 720         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 721                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 722                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 723         }
 724
 725         for (i = 0; i < 2; i++)
 726                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 727                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 728
 729         for (i = 0; i < 3; i++) {
 730                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 731                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 732         }
 733
 734         dst->total_submit       = le64_to_cpu(src->total_submit);
 735         dst->total_complete     = le64_to_cpu(src->total_complete);
 736
 737         for (i = 0; i < 2; i++) {
 738                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 739                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 740         }
 741
 742         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 743         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 744         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 745         dst->first_error        = le32_to_cpu(src->first_error);
 746         dst->kb_base            = le32_to_cpu(src->kb_base);
 747 }
 748
 749 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 750 {
 751         int i;
 752
 753         for (i = 0; i < 2; i++) {
 754                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 755                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 756                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 757                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 758                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 759                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 760         }
 761
 762         dst->kb_base    = le32_to_cpu(src->kb_base);
 763         dst->groupid    = le32_to_cpu(src->groupid);
 764 }
 765
 766 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 767 {
 768         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 769
 770         show_thread_status(&p->ts, &p->rs);
 771
 772         if (sum_stat_clients == 1)
 773                 return;
 774
 775         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 776         sum_group_stats(&client_gs, &p->rs);
 777
 778         client_ts.members++;
 779         client_ts.thread_number = p->ts.thread_number;
 780         client_ts.groupid = p->ts.groupid;
 781
 782         if (++sum_stat_nr == sum_stat_clients) {
 783                 strcpy(client_ts.name, "All clients");
 784                 show_thread_status(&client_ts, &client_gs);
 785         }
 786 }
 787
 788 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 789 {
 790         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 791
 792         show_group_stats(gs);
 793 }
 794
 795 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 796 {
 797         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 798         const char *buf = (const char *) pdu->buf;
 799         const char *name;
 800         int fio_unused ret;
 801
 802         name = client->name ? client->name : client->hostname;
 803
 804         if (!client->skip_newline)
 805                 fprintf(f_out, "<%s> ", name);
 806         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 807         fflush(f_out);
 808         client->skip_newline = strchr(buf, '\n') == NULL;
 809 }
 810
 811 static void convert_agg(struct disk_util_agg *agg)
 812 {
 813         int i;
 814
 815         for (i = 0; i < 2; i++) {
 816                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 817                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 818                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 819                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 820         }
 821
 822         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 823         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 824         agg->slavecount         = le32_to_cpu(agg->slavecount);
 825         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 826 }
 827
 828 static void convert_dus(struct disk_util_stat *dus)
 829 {
 830         int i;
 831
 832         for (i = 0; i < 2; i++) {
 833                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 834                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 835                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 836                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 837         }
 838
 839         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 840         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 841         dus->msec               = le64_to_cpu(dus->msec);
 842 }
 843
 844 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 845 {
 846         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 847
 848         if (!client->disk_stats_shown) {
 849                 client->disk_stats_shown = 1;
 850                 log_info("\nDisk stats (read/write):\n");
 851         }
 852
 853         print_disk_util(&du->dus, &du->agg, output_format == FIO_OUTPUT_TERSE);
 854 }
 855
 856 static void convert_jobs_eta(struct jobs_eta *je)
 857 {
 858         int i;
 859
 860         je->nr_running          = le32_to_cpu(je->nr_running);
 861         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 862         je->nr_pending          = le32_to_cpu(je->nr_pending);
 863         je->files_open          = le32_to_cpu(je->files_open);
 864
 865         for (i = 0; i < 2; i++) {
 866                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 867                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 868                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 869                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 870                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 871                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 872         }
 873
 874         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 875         je->eta_sec             = le64_to_cpu(je->eta_sec);
 876         je->nr_threads          = le32_to_cpu(je->nr_threads);
 877         je->is_pow2             = le32_to_cpu(je->is_pow2);
 878 }
 879
 880 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 881 {
 882         int i;
 883
 884         dst->nr_running         += je->nr_running;
 885         dst->nr_ramp            += je->nr_ramp;
 886         dst->nr_pending         += je->nr_pending;
 887         dst->files_open         += je->files_open;
 888
 889         for (i = 0; i < 2; i++) {
 890                 dst->m_rate[i]  += je->m_rate[i];
 891                 dst->t_rate[i]  += je->t_rate[i];
 892                 dst->m_iops[i]  += je->m_iops[i];
 893                 dst->t_iops[i]  += je->t_iops[i];
 894                 dst->rate[i]    += je->rate[i];
 895                 dst->iops[i]    += je->iops[i];
 896         }
 897
 898         dst->elapsed_sec        += je->elapsed_sec;
 899
 900         if (je->eta_sec > dst->eta_sec)
 901                 dst->eta_sec = je->eta_sec;
 902
 903         dst->nr_threads         += je->nr_threads;
 904         /* we need to handle je->run_str too ... */
 905 }
 906
 907 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 908 {
 909         if (!--eta->pending) {
 910                 eta_fn(&eta->eta);
 911                 free(eta);
 912         }
 913 }
 914
 915 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 916 {
 917         struct fio_net_cmd_reply *reply = NULL;
 918         struct flist_head *entry;
 919
 920         flist_for_each(entry, &client->cmd_list) {
 921                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
 922
 923                 if (cmd->tag == (uintptr_t) reply)
 924                         break;
 925
 926                 reply = NULL;
 927         }
 928
 929         if (!reply) {
 930                 log_err("fio: client: unable to find matching tag (%lx)\n", cmd->tag);
 931                 return;
 932         }
 933
 934         flist_del(&reply->list);
 935         cmd->tag = reply->saved_tag;
 936         free(reply);
 937 }
 938
 939 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
 940 {
 941         do {
 942                 struct fio_net_cmd_reply *reply = NULL;
 943                 struct flist_head *entry;
 944
 945                 flist_for_each(entry, &client->cmd_list) {
 946                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
 947
 948                         if (tag == (uintptr_t) reply)
 949                                 break;
 950
 951                         reply = NULL;
 952                 }
 953
 954                 if (!reply)
 955                         break;
 956
 957                 usleep(1000);
 958         } while (1);
 959
 960         return 0;
 961 }
 962
 963 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 964 {
 965         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 966         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 967
 968         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 969
 970         assert(client->eta_in_flight == eta);
 971
 972         client->eta_in_flight = NULL;
 973         flist_del_init(&client->eta_list);
 974
 975         if (client->ops->jobs_eta)
 976                 client->ops->jobs_eta(client, je);
 977
 978         fio_client_sum_jobs_eta(&eta->eta, je);
 979         fio_client_dec_jobs_eta(eta, client->ops->eta);
 980 }
 981
 982 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 983 {
 984         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 985         const char *os, *arch;
 986         char bit[16];
 987
 988         os = fio_get_os_string(probe->os);
 989         if (!os)
 990                 os = "unknown";
 991
 992         arch = fio_get_arch_string(probe->arch);
 993         if (!arch)
 994                 os = "unknown";
 995
 996         sprintf(bit, "%d-bit", probe->bpp * 8);
 997
 998         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s\n",
 999                 probe->hostname, probe->bigendian, bit, os, arch,
1000                 probe->fio_version);
1001
1002         if (!client->name)
1003                 client->name = strdup((char *) probe->hostname);
1004 }
1005
1006 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1007 {
1008         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1009
1010         client->state = Client_started;
1011         client->jobs = pdu->jobs;
1012 }
1013
1014 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
1015 {
1016         if (client->error)
1017                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1018 }
1019
1020 static void convert_stop(struct fio_net_cmd *cmd)
1021 {
1022         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1023
1024         pdu->error = le32_to_cpu(pdu->error);
1025 }
1026
1027 static void convert_text(struct fio_net_cmd *cmd)
1028 {
1029         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1030
1031         pdu->level      = le32_to_cpu(pdu->level);
1032         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1033         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1034         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1035 }
1036
1037 /*
1038  * This has been compressed on the server side, since it can be big.
1039  * Uncompress here.
1040  */
1041 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd)
1042 {
1043         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1044         struct cmd_iolog_pdu *ret;
1045         uint32_t nr_samples;
1046         unsigned long total;
1047         z_stream stream;
1048         void *p;
1049         int i;
1050
1051         stream.zalloc = Z_NULL;
1052         stream.zfree = Z_NULL;
1053         stream.opaque = Z_NULL;
1054         stream.avail_in = 0;
1055         stream.next_in = Z_NULL;
1056
1057         if (inflateInit(&stream) != Z_OK)
1058                 return NULL;
1059
1060         /*
1061          * Get header first, it's not compressed
1062          */
1063         nr_samples = le32_to_cpu(pdu->nr_samples);
1064
1065         total = nr_samples * sizeof(struct io_sample);
1066         ret = malloc(total + sizeof(*pdu));
1067         ret->thread_number = le32_to_cpu(pdu->thread_number);
1068         ret->nr_samples = nr_samples;
1069         ret->log_type = le32_to_cpu(pdu->log_type);
1070         strcpy((char *) ret->name, (char *) pdu->name);
1071
1072         p = (void *) ret + sizeof(*pdu);
1073
1074         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1075         stream.next_in = (void *) pdu + sizeof(*pdu);
1076         while (stream.avail_in) {
1077                 unsigned int this_chunk = 65536;
1078                 unsigned int this_len;
1079                 int err;
1080
1081                 if (this_chunk > total)
1082                         this_chunk = total;
1083
1084                 stream.avail_out = this_chunk;
1085                 stream.next_out = p;
1086                 err = inflate(&stream, Z_NO_FLUSH);
1087                 /* may be Z_OK, or Z_STREAM_END */
1088                 if (err < 0) {
1089                         log_err("fio: inflate error %d\n", err);
1090                         free(ret);
1091                         ret = NULL;
1092                         goto out;
1093                 }
1094
1095                 this_len = this_chunk - stream.avail_out;
1096                 p += this_len;
1097                 total -= this_len;
1098         }
1099
1100         for (i = 0; i < ret->nr_samples; i++) {
1101                 struct io_sample *s = &ret->samples[i];
1102
1103                 s->time = le64_to_cpu(s->time);
1104                 s->val  = le64_to_cpu(s->val);
1105                 s->ddir = le32_to_cpu(s->ddir);
1106                 s->bs   = le32_to_cpu(s->bs);
1107         }
1108
1109 out:
1110         inflateEnd(&stream);
1111         return ret;
1112 }
1113
1114 int fio_handle_client(struct fio_client *client)
1115 {
1116         struct client_ops *ops = client->ops;
1117         struct fio_net_cmd *cmd;
1118
1119         dprint(FD_NET, "client: handle %s\n", client->hostname);
1120
1121         cmd = fio_net_recv_cmd(client->fd);
1122         if (!cmd)
1123                 return 0;
1124
1125         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1126                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1127
1128         switch (cmd->opcode) {
1129         case FIO_NET_CMD_QUIT:
1130                 if (ops->quit)
1131                         ops->quit(client, cmd);
1132                 remove_client(client);
1133                 free(cmd);
1134                 break;
1135         case FIO_NET_CMD_TEXT:
1136                 convert_text(cmd);
1137                 ops->text(client, cmd);
1138                 free(cmd);
1139                 break;
1140         case FIO_NET_CMD_DU: {
1141                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1142
1143                 convert_dus(&du->dus);
1144                 convert_agg(&du->agg);
1145
1146                 ops->disk_util(client, cmd);
1147                 free(cmd);
1148                 break;
1149                 }
1150         case FIO_NET_CMD_TS: {
1151                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1152
1153                 convert_ts(&p->ts, &p->ts);
1154                 convert_gs(&p->rs, &p->rs);
1155
1156                 ops->thread_status(client, cmd);
1157                 free(cmd);
1158                 break;
1159                 }
1160         case FIO_NET_CMD_GS: {
1161                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1162
1163                 convert_gs(gs, gs);
1164
1165                 ops->group_stats(client, cmd);
1166                 free(cmd);
1167                 break;
1168                 }
1169         case FIO_NET_CMD_ETA: {
1170                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1171
1172                 remove_reply_cmd(client, cmd);
1173                 convert_jobs_eta(je);
1174                 handle_eta(client, cmd);
1175                 free(cmd);
1176                 break;
1177                 }
1178         case FIO_NET_CMD_PROBE:
1179                 remove_reply_cmd(client, cmd);
1180                 ops->probe(client, cmd);
1181                 free(cmd);
1182                 break;
1183         case FIO_NET_CMD_SERVER_START:
1184                 client->state = Client_running;
1185                 if (ops->job_start)
1186                         ops->job_start(client, cmd);
1187                 free(cmd);
1188                 break;
1189         case FIO_NET_CMD_START: {
1190                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1191
1192                 pdu->jobs = le32_to_cpu(pdu->jobs);
1193                 ops->start(client, cmd);
1194                 free(cmd);
1195                 break;
1196                 }
1197         case FIO_NET_CMD_STOP: {
1198                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1199
1200                 convert_stop(cmd);
1201                 client->state = Client_stopped;
1202                 client->error = le32_to_cpu(pdu->error);
1203                 client->signal = le32_to_cpu(pdu->signal);
1204                 ops->stop(client, cmd);
1205                 free(cmd);
1206                 break;
1207                 }
1208         case FIO_NET_CMD_ADD_JOB: {
1209                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1210
1211                 client->thread_number = le32_to_cpu(pdu->thread_number);
1212                 client->groupid = le32_to_cpu(pdu->groupid);
1213
1214                 if (ops->add_job)
1215                         ops->add_job(client, cmd);
1216                 free(cmd);
1217                 break;
1218                 }
1219         case FIO_NET_CMD_IOLOG:
1220                 if (ops->iolog) {
1221                         struct cmd_iolog_pdu *pdu;
1222
1223                         pdu = convert_iolog(cmd);
1224                         ops->iolog(client, pdu);
1225                 }
1226                 free(cmd);
1227                 break;
1228         case FIO_NET_CMD_UPDATE_JOB:
1229                 ops->update_job(client, cmd);
1230                 remove_reply_cmd(client, cmd);
1231                 free(cmd);
1232                 break;
1233         default:
1234                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1235                 free(cmd);
1236                 break;
1237         }
1238
1239         return 1;
1240 }
1241
1242 static void request_client_etas(struct client_ops *ops)
1243 {
1244         struct fio_client *client;
1245         struct flist_head *entry;
1246         struct client_eta *eta;
1247         int skipped = 0;
1248
1249         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1250
1251         eta = malloc(sizeof(*eta));
1252         memset(&eta->eta, 0, sizeof(eta->eta));
1253         eta->pending = nr_clients;
1254
1255         flist_for_each(entry, &client_list) {
1256                 client = flist_entry(entry, struct fio_client, list);
1257
1258                 if (!flist_empty(&client->eta_list)) {
1259                         skipped++;
1260                         continue;
1261                 }
1262                 if (client->state != Client_running)
1263                         continue;
1264
1265                 assert(!client->eta_in_flight);
1266                 flist_add_tail(&client->eta_list, &eta_list);
1267                 client->eta_in_flight = eta;
1268                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1269                                         (uintptr_t) eta, &client->cmd_list);
1270         }
1271
1272         while (skipped--)
1273                 fio_client_dec_jobs_eta(eta, ops->eta);
1274
1275         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1276 }
1277
1278 static int client_check_cmd_timeout(struct fio_client *client,
1279                                     struct timeval *now)
1280 {
1281         struct fio_net_cmd_reply *reply;
1282         struct flist_head *entry, *tmp;
1283         int ret = 0;
1284
1285         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1286                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1287
1288                 if (mtime_since(&reply->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1289                         continue;
1290
1291                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1292                                                 fio_server_op(reply->opcode));
1293                 flist_del(&reply->list);
1294                 free(reply);
1295                 ret = 1;
1296         }
1297
1298         return flist_empty(&client->cmd_list) && ret;
1299 }
1300
1301 static int fio_check_clients_timed_out(void)
1302 {
1303         struct fio_client *client;
1304         struct flist_head *entry, *tmp;
1305         struct timeval tv;
1306         int ret = 0;
1307
1308         gettimeofday(&tv, NULL);
1309
1310         flist_for_each_safe(entry, tmp, &client_list) {
1311                 client = flist_entry(entry, struct fio_client, list);
1312
1313                 if (flist_empty(&client->cmd_list))
1314                         continue;
1315
1316                 if (!client_check_cmd_timeout(client, &tv))
1317                         continue;
1318
1319                 if (client->ops->timed_out)
1320                         client->ops->timed_out(client);
1321                 else
1322                         log_err("fio: client %s timed out\n", client->hostname);
1323
1324                 remove_client(client);
1325                 ret = 1;
1326         }
1327
1328         return ret;
1329 }
1330
1331 int fio_handle_clients(struct client_ops *ops)
1332 {
1333         struct pollfd *pfds;
1334         int i, ret = 0, retval = 0;
1335
1336         gettimeofday(&eta_tv, NULL);
1337
1338         pfds = malloc(nr_clients * sizeof(struct pollfd));
1339
1340         sum_stat_clients = nr_clients;
1341         init_thread_stat(&client_ts);
1342         init_group_run_stat(&client_gs);
1343
1344         while (!exit_backend && nr_clients) {
1345                 struct flist_head *entry, *tmp;
1346                 struct fio_client *client;
1347
1348                 i = 0;
1349                 flist_for_each_safe(entry, tmp, &client_list) {
1350                         client = flist_entry(entry, struct fio_client, list);
1351
1352                         if (!client->sent_job && !client->ops->stay_connected &&
1353                             flist_empty(&client->cmd_list)) {
1354                                 remove_client(client);
1355                                 continue;
1356                         }
1357
1358                         pfds[i].fd = client->fd;
1359                         pfds[i].events = POLLIN;
1360                         i++;
1361                 }
1362
1363                 if (!nr_clients)
1364                         break;
1365
1366                 assert(i == nr_clients);
1367
1368                 do {
1369                         struct timeval tv;
1370
1371                         gettimeofday(&tv, NULL);
1372                         if (mtime_since(&eta_tv, &tv) >= ops->eta_msec) {
1373                                 request_client_etas(ops);
1374                                 memcpy(&eta_tv, &tv, sizeof(tv));
1375
1376                                 if (fio_check_clients_timed_out())
1377                                         break;
1378                         }
1379
1380                         ret = poll(pfds, nr_clients, ops->eta_msec);
1381                         if (ret < 0) {
1382                                 if (errno == EINTR)
1383                                         continue;
1384                                 log_err("fio: poll clients: %s\n", strerror(errno));
1385                                 break;
1386                         } else if (!ret)
1387                                 continue;
1388                 } while (ret <= 0);
1389
1390                 for (i = 0; i < nr_clients; i++) {
1391                         if (!(pfds[i].revents & POLLIN))
1392                                 continue;
1393
1394                         client = find_client_by_fd(pfds[i].fd);
1395                         if (!client) {
1396                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1397                                 continue;
1398                         }
1399                         if (!fio_handle_client(client)) {
1400                                 log_info("client: host=%s disconnected\n",
1401                                                 client->hostname);
1402                                 remove_client(client);
1403                                 retval = 1;
1404                         } else if (client->error)
1405                                 retval = 1;
1406                         fio_put_client(client);
1407                 }
1408         }
1409
1410         free(pfds);
1411         return retval;
1412 }