client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <poll.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <sys/socket.h>
  10 #include <sys/un.h>
  11 #include <netinet/in.h>
  12 #include <arpa/inet.h>
  13 #include <netdb.h>
  14 #include <signal.h>
  15 #ifdef CONFIG_ZLIB
  16 #include <zlib.h>
  17 #endif
  18
  19 #include "fio.h"
  20 #include "client.h"
  21 #include "server.h"
  22 #include "flist.h"
  23 #include "hash.h"
  24 #include "verify-state.h"
  25
  26 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  31 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  32 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  33
  34 static void convert_text(struct fio_net_cmd *cmd);
  35
  36 struct client_ops fio_client_ops = {
  37         .text           = handle_text,
  38         .disk_util      = handle_du,
  39         .thread_status  = handle_ts,
  40         .group_stats    = handle_gs,
  41         .stop           = handle_stop,
  42         .start          = handle_start,
  43         .eta            = display_thread_status,
  44         .probe          = handle_probe,
  45         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  46         .client_type    = FIO_CLIENT_TYPE_CLI,
  47 };
  48
  49 static struct timespec eta_ts;
  50
  51 static FLIST_HEAD(client_list);
  52 static FLIST_HEAD(eta_list);
  53
  54 static FLIST_HEAD(arg_list);
  55
  56 struct thread_stat client_ts;
  57 struct group_run_stats client_gs;
  58 int sum_stat_clients;
  59
  60 static int sum_stat_nr;
  61 static struct json_object *root = NULL;
  62 static struct json_object *job_opt_object = NULL;
  63 static struct json_array *clients_array = NULL;
  64 static struct json_array *du_array = NULL;
  65
  66 static int error_clients;
  67
  68 #define FIO_CLIENT_HASH_BITS    7
  69 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  70 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  71 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  72
  73 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *, bool *);
  74
  75 static void fio_client_add_hash(struct fio_client *client)
  76 {
  77         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  78
  79         bucket &= FIO_CLIENT_HASH_MASK;
  80         flist_add(&client->hash_list, &client_hash[bucket]);
  81 }
  82
  83 static void fio_client_remove_hash(struct fio_client *client)
  84 {
  85         if (!flist_empty(&client->hash_list))
  86                 flist_del_init(&client->hash_list);
  87 }
  88
  89 static void fio_init fio_client_hash_init(void)
  90 {
  91         int i;
  92
  93         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  94                 INIT_FLIST_HEAD(&client_hash[i]);
  95 }
  96
  97 static int read_data(int fd, void *data, size_t size)
  98 {
  99         ssize_t ret;
 100
 101         while (size) {
 102                 ret = read(fd, data, size);
 103                 if (ret < 0) {
 104                         if (errno == EAGAIN || errno == EINTR)
 105                                 continue;
 106                         break;
 107                 } else if (!ret)
 108                         break;
 109                 else {
 110                         data += ret;
 111                         size -= ret;
 112                 }
 113         }
 114
 115         if (size)
 116                 return EAGAIN;
 117
 118         return 0;
 119 }
 120
 121 static void fio_client_json_init(void)
 122 {
 123         char time_buf[32];
 124         time_t time_p;
 125
 126         if (!(output_format & FIO_OUTPUT_JSON))
 127                 return;
 128
 129         time(&time_p);
 130         os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
 131         time_buf[strlen(time_buf) - 1] = '\0';
 132
 133         root = json_create_object();
 134         json_object_add_value_string(root, "fio version", fio_version_string);
 135         json_object_add_value_int(root, "timestamp", time_p);
 136         json_object_add_value_string(root, "time", time_buf);
 137
 138         job_opt_object = json_create_object();
 139         json_object_add_value_object(root, "global options", job_opt_object);
 140         clients_array = json_create_array();
 141         json_object_add_value_array(root, "client_stats", clients_array);
 142         du_array = json_create_array();
 143         json_object_add_value_array(root, "disk_util", du_array);
 144 }
 145
 146 static void fio_client_json_fini(void)
 147 {
 148         if (!(output_format & FIO_OUTPUT_JSON))
 149                 return;
 150
 151         log_info("\n");
 152         json_print_object(root, NULL);
 153         log_info("\n");
 154         json_free_object(root);
 155         root = NULL;
 156         clients_array = NULL;
 157         du_array = NULL;
 158 }
 159
 160 static struct fio_client *find_client_by_fd(int fd)
 161 {
 162         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 163         struct fio_client *client;
 164         struct flist_head *entry;
 165
 166         flist_for_each(entry, &client_hash[bucket]) {
 167                 client = flist_entry(entry, struct fio_client, hash_list);
 168
 169                 if (client->fd == fd) {
 170                         client->refs++;
 171                         return client;
 172                 }
 173         }
 174
 175         return NULL;
 176 }
 177
 178 void fio_put_client(struct fio_client *client)
 179 {
 180         if (--client->refs)
 181                 return;
 182
 183         free(client->hostname);
 184         if (client->argv)
 185                 free(client->argv);
 186         if (client->name)
 187                 free(client->name);
 188         while (client->nr_files) {
 189                 struct client_file *cf = &client->files[--client->nr_files];
 190
 191                 free(cf->file);
 192         }
 193         if (client->files)
 194                 free(client->files);
 195         if (client->opt_lists)
 196                 free(client->opt_lists);
 197
 198         if (!client->did_stat)
 199                 sum_stat_clients--;
 200
 201         if (client->error)
 202                 error_clients++;
 203
 204         free(client);
 205 }
 206
 207 static int fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 208 {
 209         if (!--eta->pending) {
 210                 eta_fn(&eta->eta);
 211                 free(eta);
 212                 return 0;
 213         }
 214
 215         return 1;
 216 }
 217
 218 static void fio_drain_client_text(struct fio_client *client)
 219 {
 220         do {
 221                 struct fio_net_cmd *cmd;
 222
 223                 cmd = fio_net_recv_cmd(client->fd, false);
 224                 if (!cmd)
 225                         break;
 226
 227                 if (cmd->opcode == FIO_NET_CMD_TEXT) {
 228                         convert_text(cmd);
 229                         client->ops->text(client, cmd);
 230                 }
 231
 232                 free(cmd);
 233         } while (1);
 234 }
 235
 236 static void remove_client(struct fio_client *client)
 237 {
 238         assert(client->refs);
 239
 240         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 241
 242         fio_drain_client_text(client);
 243
 244         if (!flist_empty(&client->list))
 245                 flist_del_init(&client->list);
 246
 247         fio_client_remove_hash(client);
 248
 249         if (!flist_empty(&client->eta_list)) {
 250                 flist_del_init(&client->eta_list);
 251                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 252         }
 253
 254         close(client->fd);
 255         client->fd = -1;
 256
 257         if (client->ops->removed)
 258                 client->ops->removed(client);
 259
 260         nr_clients--;
 261         fio_put_client(client);
 262 }
 263
 264 struct fio_client *fio_get_client(struct fio_client *client)
 265 {
 266         client->refs++;
 267         return client;
 268 }
 269
 270 static void __fio_client_add_cmd_option(struct fio_client *client,
 271                                         const char *opt)
 272 {
 273         int index;
 274
 275         index = client->argc++;
 276         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 277         client->argv[index] = strdup(opt);
 278         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 279 }
 280
 281 void fio_client_add_cmd_option(void *cookie, const char *opt)
 282 {
 283         struct fio_client *client = cookie;
 284         struct flist_head *entry;
 285
 286         if (!client || !opt)
 287                 return;
 288
 289         __fio_client_add_cmd_option(client, opt);
 290
 291         /*
 292          * Duplicate arguments to shared client group
 293          */
 294         flist_for_each(entry, &arg_list) {
 295                 client = flist_entry(entry, struct fio_client, arg_list);
 296
 297                 __fio_client_add_cmd_option(client, opt);
 298         }
 299 }
 300
 301 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 302                                            const char *hostname, int type,
 303                                            int port)
 304 {
 305         struct fio_client *client;
 306
 307         client = malloc(sizeof(*client));
 308         memset(client, 0, sizeof(*client));
 309
 310         INIT_FLIST_HEAD(&client->list);
 311         INIT_FLIST_HEAD(&client->hash_list);
 312         INIT_FLIST_HEAD(&client->arg_list);
 313         INIT_FLIST_HEAD(&client->eta_list);
 314         INIT_FLIST_HEAD(&client->cmd_list);
 315
 316         client->hostname = strdup(hostname);
 317
 318         if (type == Fio_client_socket)
 319                 client->is_sock = true;
 320         else {
 321                 int ipv6;
 322
 323                 ipv6 = type == Fio_client_ipv6;
 324                 if (fio_server_parse_host(hostname, ipv6,
 325                                                 &client->addr.sin_addr,
 326                                                 &client->addr6.sin6_addr))
 327                         goto err;
 328
 329                 client->port = port;
 330         }
 331
 332         client->fd = -1;
 333         client->ops = ops;
 334         client->refs = 1;
 335         client->type = ops->client_type;
 336
 337         __fio_client_add_cmd_option(client, "fio");
 338
 339         flist_add(&client->list, &client_list);
 340         nr_clients++;
 341         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 342         return client;
 343 err:
 344         free(client);
 345         return NULL;
 346 }
 347
 348 int fio_client_add_ini_file(void *cookie, const char *ini_file, bool remote)
 349 {
 350         struct fio_client *client = cookie;
 351         struct client_file *cf;
 352         size_t new_size;
 353         void *new_files;
 354
 355         if (!client)
 356                 return 1;
 357
 358         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 359
 360         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 361         new_files = realloc(client->files, new_size);
 362         if (!new_files)
 363                 return 1;
 364
 365         client->files = new_files;
 366         cf = &client->files[client->nr_files];
 367         cf->file = strdup(ini_file);
 368         cf->remote = remote;
 369         client->nr_files++;
 370         return 0;
 371 }
 372
 373 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 374 {
 375         struct fio_client *existing = *cookie;
 376         struct fio_client *client;
 377
 378         if (existing) {
 379                 /*
 380                  * We always add our "exec" name as the option, hence 1
 381                  * means empty.
 382                  */
 383                 if (existing->argc == 1)
 384                         flist_add_tail(&existing->arg_list, &arg_list);
 385                 else {
 386                         while (!flist_empty(&arg_list))
 387                                 flist_del_init(arg_list.next);
 388                 }
 389         }
 390
 391         client = malloc(sizeof(*client));
 392         memset(client, 0, sizeof(*client));
 393
 394         INIT_FLIST_HEAD(&client->list);
 395         INIT_FLIST_HEAD(&client->hash_list);
 396         INIT_FLIST_HEAD(&client->arg_list);
 397         INIT_FLIST_HEAD(&client->eta_list);
 398         INIT_FLIST_HEAD(&client->cmd_list);
 399
 400         if (fio_server_parse_string(hostname, &client->hostname,
 401                                         &client->is_sock, &client->port,
 402                                         &client->addr.sin_addr,
 403                                         &client->addr6.sin6_addr,
 404                                         &client->ipv6))
 405                 return -1;
 406
 407         client->fd = -1;
 408         client->ops = ops;
 409         client->refs = 1;
 410         client->type = ops->client_type;
 411
 412         __fio_client_add_cmd_option(client, "fio");
 413
 414         flist_add(&client->list, &client_list);
 415         nr_clients++;
 416         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 417         *cookie = client;
 418         return 0;
 419 }
 420
 421 static const char *server_name(struct fio_client *client, char *buf,
 422                                size_t bufsize)
 423 {
 424         const char *from;
 425
 426         if (client->ipv6)
 427                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 428         else if (client->is_sock)
 429                 from = "sock";
 430         else
 431                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 432
 433         return from;
 434 }
 435
 436 static void probe_client(struct fio_client *client)
 437 {
 438         struct cmd_client_probe_pdu pdu;
 439         const char *sname;
 440         uint64_t tag;
 441         char buf[64];
 442
 443         dprint(FD_NET, "client: send probe\n");
 444
 445 #ifdef CONFIG_ZLIB
 446         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 447 #else
 448         pdu.flags = 0;
 449 #endif
 450
 451         sname = server_name(client, buf, sizeof(buf));
 452         memset(pdu.server, 0, sizeof(pdu.server));
 453         strncpy((char *) pdu.server, sname, sizeof(pdu.server) - 1);
 454
 455         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 456 }
 457
 458 static int fio_client_connect_ip(struct fio_client *client)
 459 {
 460         struct sockaddr *addr;
 461         socklen_t socklen;
 462         int fd, domain;
 463
 464         if (client->ipv6) {
 465                 client->addr6.sin6_family = AF_INET6;
 466                 client->addr6.sin6_port = htons(client->port);
 467                 domain = AF_INET6;
 468                 addr = (struct sockaddr *) &client->addr6;
 469                 socklen = sizeof(client->addr6);
 470         } else {
 471                 client->addr.sin_family = AF_INET;
 472                 client->addr.sin_port = htons(client->port);
 473                 domain = AF_INET;
 474                 addr = (struct sockaddr *) &client->addr;
 475                 socklen = sizeof(client->addr);
 476         }
 477
 478         fd = socket(domain, SOCK_STREAM, 0);
 479         if (fd < 0) {
 480                 int ret = -errno;
 481
 482                 log_err("fio: socket: %s\n", strerror(errno));
 483                 return ret;
 484         }
 485
 486         if (connect(fd, addr, socklen) < 0) {
 487                 int ret = -errno;
 488
 489                 log_err("fio: connect: %s\n", strerror(errno));
 490                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 491                                                                 client->port);
 492                 close(fd);
 493                 return ret;
 494         }
 495
 496         return fd;
 497 }
 498
 499 static int fio_client_connect_sock(struct fio_client *client)
 500 {
 501         struct sockaddr_un *addr = &client->addr_un;
 502         socklen_t len;
 503         int fd;
 504
 505         memset(addr, 0, sizeof(*addr));
 506         addr->sun_family = AF_UNIX;
 507         strncpy(addr->sun_path, client->hostname, sizeof(addr->sun_path) - 1);
 508
 509         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 510         if (fd < 0) {
 511                 int ret = -errno;
 512
 513                 log_err("fio: socket: %s\n", strerror(errno));
 514                 return ret;
 515         }
 516
 517         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 518         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 519                 int ret = -errno;
 520
 521                 log_err("fio: connect; %s\n", strerror(errno));
 522                 close(fd);
 523                 return ret;
 524         }
 525
 526         return fd;
 527 }
 528
 529 int fio_client_connect(struct fio_client *client)
 530 {
 531         int fd;
 532
 533         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 534
 535         if (client->is_sock)
 536                 fd = fio_client_connect_sock(client);
 537         else
 538                 fd = fio_client_connect_ip(client);
 539
 540         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 541
 542         if (fd < 0)
 543                 return fd;
 544
 545         client->fd = fd;
 546         fio_client_add_hash(client);
 547         client->state = Client_connected;
 548
 549         probe_client(client);
 550         return 0;
 551 }
 552
 553 int fio_client_terminate(struct fio_client *client)
 554 {
 555         return fio_net_send_quit(client->fd);
 556 }
 557
 558 static void fio_clients_terminate(void)
 559 {
 560         struct flist_head *entry;
 561         struct fio_client *client;
 562
 563         dprint(FD_NET, "client: terminate clients\n");
 564
 565         flist_for_each(entry, &client_list) {
 566                 client = flist_entry(entry, struct fio_client, list);
 567                 fio_client_terminate(client);
 568         }
 569 }
 570
 571 static void sig_int(int sig)
 572 {
 573         dprint(FD_NET, "client: got signal %d\n", sig);
 574         fio_clients_terminate();
 575 }
 576
 577 static void client_signal_handler(void)
 578 {
 579         struct sigaction act;
 580
 581         memset(&act, 0, sizeof(act));
 582         act.sa_handler = sig_int;
 583         act.sa_flags = SA_RESTART;
 584         sigaction(SIGINT, &act, NULL);
 585
 586         memset(&act, 0, sizeof(act));
 587         act.sa_handler = sig_int;
 588         act.sa_flags = SA_RESTART;
 589         sigaction(SIGTERM, &act, NULL);
 590
 591 /* Windows uses SIGBREAK as a quit signal from other applications */
 592 #ifdef WIN32
 593         memset(&act, 0, sizeof(act));
 594         act.sa_handler = sig_int;
 595         act.sa_flags = SA_RESTART;
 596         sigaction(SIGBREAK, &act, NULL);
 597 #endif
 598
 599         memset(&act, 0, sizeof(act));
 600         act.sa_handler = sig_show_status;
 601         act.sa_flags = SA_RESTART;
 602         sigaction(SIGUSR1, &act, NULL);
 603 }
 604
 605 static int send_client_cmd_line(struct fio_client *client)
 606 {
 607         struct cmd_single_line_pdu *cslp;
 608         struct cmd_line_pdu *clp;
 609         unsigned long offset;
 610         unsigned int *lens;
 611         void *pdu;
 612         size_t mem;
 613         int i, ret;
 614
 615         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 616
 617         lens = malloc(client->argc * sizeof(unsigned int));
 618
 619         /*
 620          * Find out how much mem we need
 621          */
 622         for (i = 0, mem = 0; i < client->argc; i++) {
 623                 lens[i] = strlen(client->argv[i]) + 1;
 624                 mem += lens[i];
 625         }
 626
 627         /*
 628          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 629          */
 630         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 631
 632         pdu = malloc(mem);
 633         clp = pdu;
 634         offset = sizeof(*clp);
 635
 636         for (i = 0; i < client->argc; i++) {
 637                 uint16_t arg_len = lens[i];
 638
 639                 cslp = pdu + offset;
 640                 strcpy((char *) cslp->text, client->argv[i]);
 641                 cslp->len = cpu_to_le16(arg_len);
 642                 offset += sizeof(*cslp) + arg_len;
 643         }
 644
 645         free(lens);
 646         clp->lines = cpu_to_le16(client->argc);
 647         clp->client_type = __cpu_to_le16(client->type);
 648         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 649         free(pdu);
 650         return ret;
 651 }
 652
 653 int fio_clients_connect(void)
 654 {
 655         struct fio_client *client;
 656         struct flist_head *entry, *tmp;
 657         int ret;
 658
 659 #ifdef WIN32
 660         WSADATA wsd;
 661         WSAStartup(MAKEWORD(2, 2), &wsd);
 662 #endif
 663
 664         dprint(FD_NET, "client: connect all\n");
 665
 666         client_signal_handler();
 667
 668         flist_for_each_safe(entry, tmp, &client_list) {
 669                 client = flist_entry(entry, struct fio_client, list);
 670
 671                 ret = fio_client_connect(client);
 672                 if (ret) {
 673                         remove_client(client);
 674                         continue;
 675                 }
 676
 677                 if (client->argc > 1)
 678                         send_client_cmd_line(client);
 679         }
 680
 681         return !nr_clients;
 682 }
 683
 684 int fio_start_client(struct fio_client *client)
 685 {
 686         dprint(FD_NET, "client: start %s\n", client->hostname);
 687         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 688 }
 689
 690 int fio_start_all_clients(void)
 691 {
 692         struct fio_client *client;
 693         struct flist_head *entry, *tmp;
 694         int ret;
 695
 696         dprint(FD_NET, "client: start all\n");
 697
 698         fio_client_json_init();
 699
 700         flist_for_each_safe(entry, tmp, &client_list) {
 701                 client = flist_entry(entry, struct fio_client, list);
 702
 703                 ret = fio_start_client(client);
 704                 if (ret) {
 705                         remove_client(client);
 706                         continue;
 707                 }
 708         }
 709
 710         return flist_empty(&client_list);
 711 }
 712
 713 static int __fio_client_send_remote_ini(struct fio_client *client,
 714                                         const char *filename)
 715 {
 716         struct cmd_load_file_pdu *pdu;
 717         size_t p_size;
 718         int ret;
 719
 720         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 721
 722         p_size = sizeof(*pdu) + strlen(filename) + 1;
 723         pdu = malloc(p_size);
 724         memset(pdu, 0, p_size);
 725         pdu->name_len = strlen(filename);
 726         strcpy((char *) pdu->file, filename);
 727         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 728
 729         client->sent_job = true;
 730         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 731         free(pdu);
 732         return ret;
 733 }
 734
 735 /*
 736  * Send file contents to server backend. We could use sendfile(), but to remain
 737  * more portable lets just read/write the darn thing.
 738  */
 739 static int __fio_client_send_local_ini(struct fio_client *client,
 740                                        const char *filename)
 741 {
 742         struct cmd_job_pdu *pdu;
 743         size_t p_size;
 744         struct stat sb;
 745         char *p;
 746         void *buf;
 747         off_t len;
 748         int fd, ret;
 749
 750         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 751
 752         fd = open(filename, O_RDONLY);
 753         if (fd < 0) {
 754                 ret = -errno;
 755                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 756                 return ret;
 757         }
 758
 759         if (fstat(fd, &sb) < 0) {
 760                 ret = -errno;
 761                 log_err("fio: job file stat: %s\n", strerror(errno));
 762                 close(fd);
 763                 return ret;
 764         }
 765
 766         p_size = sb.st_size + sizeof(*pdu);
 767         pdu = malloc(p_size);
 768         buf = pdu->buf;
 769
 770         len = sb.st_size;
 771         p = buf;
 772         if (read_data(fd, p, len)) {
 773                 log_err("fio: failed reading job file %s\n", filename);
 774                 close(fd);
 775                 free(pdu);
 776                 return 1;
 777         }
 778
 779         pdu->buf_len = __cpu_to_le32(sb.st_size);
 780         pdu->client_type = cpu_to_le32(client->type);
 781
 782         client->sent_job = true;
 783         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 784         free(pdu);
 785         close(fd);
 786         return ret;
 787 }
 788
 789 int fio_client_send_ini(struct fio_client *client, const char *filename,
 790                         bool remote)
 791 {
 792         int ret;
 793
 794         if (!remote)
 795                 ret = __fio_client_send_local_ini(client, filename);
 796         else
 797                 ret = __fio_client_send_remote_ini(client, filename);
 798
 799         if (!ret)
 800                 client->sent_job = true;
 801
 802         return ret;
 803 }
 804
 805 static int fio_client_send_cf(struct fio_client *client,
 806                               struct client_file *cf)
 807 {
 808         return fio_client_send_ini(client, cf->file, cf->remote);
 809 }
 810
 811 int fio_clients_send_ini(const char *filename)
 812 {
 813         struct fio_client *client;
 814         struct flist_head *entry, *tmp;
 815
 816         flist_for_each_safe(entry, tmp, &client_list) {
 817                 bool failed = false;
 818
 819                 client = flist_entry(entry, struct fio_client, list);
 820
 821                 if (client->nr_files) {
 822                         int i;
 823
 824                         for (i = 0; i < client->nr_files; i++) {
 825                                 struct client_file *cf;
 826
 827                                 cf = &client->files[i];
 828
 829                                 if (fio_client_send_cf(client, cf)) {
 830                                         failed = true;
 831                                         remove_client(client);
 832                                         break;
 833                                 }
 834                         }
 835                 }
 836                 if (client->sent_job || failed)
 837                         continue;
 838                 if (!filename || fio_client_send_ini(client, filename, 0))
 839                         remove_client(client);
 840         }
 841
 842         return !nr_clients;
 843 }
 844
 845 int fio_client_update_options(struct fio_client *client,
 846                               struct thread_options *o, uint64_t *tag)
 847 {
 848         struct cmd_add_job_pdu pdu;
 849
 850         pdu.thread_number = cpu_to_le32(client->thread_number);
 851         pdu.groupid = cpu_to_le32(client->groupid);
 852         convert_thread_options_to_net(&pdu.top, o);
 853
 854         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 855 }
 856
 857 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 858 {
 859         dst->max_val    = le64_to_cpu(src->max_val);
 860         dst->min_val    = le64_to_cpu(src->min_val);
 861         dst->samples    = le64_to_cpu(src->samples);
 862
 863         /*
 864          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 865          */
 866         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 867         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 868 }
 869
 870 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 871 {
 872         int i, j;
 873
 874         dst->error              = le32_to_cpu(src->error);
 875         dst->thread_number      = le32_to_cpu(src->thread_number);
 876         dst->groupid            = le32_to_cpu(src->groupid);
 877         dst->pid                = le32_to_cpu(src->pid);
 878         dst->members            = le32_to_cpu(src->members);
 879         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 880
 881         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 882                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 883                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 884                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 885                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 886                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 887         }
 888
 889         dst->usr_time           = le64_to_cpu(src->usr_time);
 890         dst->sys_time           = le64_to_cpu(src->sys_time);
 891         dst->ctx                = le64_to_cpu(src->ctx);
 892         dst->minf               = le64_to_cpu(src->minf);
 893         dst->majf               = le64_to_cpu(src->majf);
 894         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 895         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 896         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 897
 898         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 899                 fio_fp64_t *fps = &src->percentile_list[i];
 900                 fio_fp64_t *fpd = &dst->percentile_list[i];
 901
 902                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 903         }
 904
 905         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 906                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 907                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 908                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 909         }
 910
 911         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 912                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
 913         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 914                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
 915         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 916                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
 917
 918         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 919                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 920                         dst->io_u_plat[i][j] = le64_to_cpu(src->io_u_plat[i][j]);
 921
 922         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 923                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 924                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 925                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
 926         }
 927
 928         dst->total_submit       = le64_to_cpu(src->total_submit);
 929         dst->total_complete     = le64_to_cpu(src->total_complete);
 930
 931         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 932                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 933                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 934         }
 935
 936         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 937         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 938         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 939         dst->first_error        = le32_to_cpu(src->first_error);
 940         dst->kb_base            = le32_to_cpu(src->kb_base);
 941         dst->unit_base          = le32_to_cpu(src->unit_base);
 942
 943         dst->sig_figs           = le32_to_cpu(src->sig_figs);
 944
 945         dst->latency_depth      = le32_to_cpu(src->latency_depth);
 946         dst->latency_target     = le64_to_cpu(src->latency_target);
 947         dst->latency_window     = le64_to_cpu(src->latency_window);
 948         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
 949
 950         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
 951         for (i = 0; i < dst->nr_block_infos; i++)
 952                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
 953
 954         dst->ss_dur             = le64_to_cpu(src->ss_dur);
 955         dst->ss_state           = le32_to_cpu(src->ss_state);
 956         dst->ss_head            = le32_to_cpu(src->ss_head);
 957         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
 958         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
 959         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
 960         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
 961
 962         if (dst->ss_state & FIO_SS_DATA) {
 963                 for (i = 0; i < dst->ss_dur; i++ ) {
 964                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
 965                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
 966                 }
 967         }
 968 }
 969
 970 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 971 {
 972         int i;
 973
 974         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 975                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 976                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 977                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 978                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 979                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
 980                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 981         }
 982
 983         dst->kb_base    = le32_to_cpu(src->kb_base);
 984         dst->unit_base  = le32_to_cpu(src->unit_base);
 985         dst->sig_figs   = le32_to_cpu(src->sig_figs);
 986         dst->groupid    = le32_to_cpu(src->groupid);
 987         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 988 }
 989
 990 static void json_object_add_client_info(struct json_object *obj,
 991                                         struct fio_client *client)
 992 {
 993         const char *hostname = client->hostname ? client->hostname : "";
 994
 995         json_object_add_value_string(obj, "hostname", hostname);
 996         json_object_add_value_int(obj, "port", client->port);
 997 }
 998
 999 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1000 {
1001         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1002         struct flist_head *opt_list = NULL;
1003         struct json_object *tsobj;
1004
1005         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1006                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1007
1008         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, NULL);
1009         client->did_stat = true;
1010         if (tsobj) {
1011                 json_object_add_client_info(tsobj, client);
1012                 json_array_add_value_object(clients_array, tsobj);
1013         }
1014
1015         if (sum_stat_clients <= 1)
1016                 return;
1017
1018         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr == 1);
1019         sum_group_stats(&client_gs, &p->rs);
1020
1021         client_ts.members++;
1022         client_ts.thread_number = p->ts.thread_number;
1023         client_ts.groupid = p->ts.groupid;
1024         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1025         client_ts.sig_figs = p->ts.sig_figs;
1026
1027         if (++sum_stat_nr == sum_stat_clients) {
1028                 strcpy(client_ts.name, "All clients");
1029                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, NULL);
1030                 if (tsobj) {
1031                         json_object_add_client_info(tsobj, client);
1032                         json_array_add_value_object(clients_array, tsobj);
1033                 }
1034         }
1035 }
1036
1037 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1038 {
1039         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1040
1041         if (output_format & FIO_OUTPUT_NORMAL)
1042                 show_group_stats(gs, NULL);
1043 }
1044
1045 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1046 {
1047         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1048         struct print_option *p;
1049
1050         if (!job_opt_object)
1051                 return;
1052
1053         pdu->global = le16_to_cpu(pdu->global);
1054         pdu->truncated = le16_to_cpu(pdu->truncated);
1055         pdu->groupid = le32_to_cpu(pdu->groupid);
1056
1057         p = malloc(sizeof(*p));
1058         p->name = strdup((char *) pdu->name);
1059         if (pdu->value[0] != '\0')
1060                 p->value = strdup((char *) pdu->value);
1061         else
1062                 p->value = NULL;
1063
1064         if (pdu->global) {
1065                 const char *pos = "";
1066
1067                 if (p->value)
1068                         pos = p->value;
1069
1070                 json_object_add_value_string(job_opt_object, p->name, pos);
1071         } else if (client->opt_lists) {
1072                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1073
1074                 flist_add_tail(&p->list, opt_list);
1075         }
1076 }
1077
1078 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1079 {
1080         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1081         const char *buf = (const char *) pdu->buf;
1082         const char *name;
1083         int fio_unused ret;
1084
1085         name = client->name ? client->name : client->hostname;
1086
1087         if (!client->skip_newline)
1088                 fprintf(f_out, "<%s> ", name);
1089         ret = fwrite(buf, pdu->buf_len, 1, f_out);
1090         fflush(f_out);
1091         client->skip_newline = strchr(buf, '\n') == NULL;
1092 }
1093
1094 static void convert_agg(struct disk_util_agg *agg)
1095 {
1096         int i;
1097
1098         for (i = 0; i < 2; i++) {
1099                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1100                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1101                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1102                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1103         }
1104
1105         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1106         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1107         agg->slavecount         = le32_to_cpu(agg->slavecount);
1108         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1109 }
1110
1111 static void convert_dus(struct disk_util_stat *dus)
1112 {
1113         int i;
1114
1115         for (i = 0; i < 2; i++) {
1116                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1117                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1118                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1119                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1120         }
1121
1122         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1123         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1124         dus->s.msec             = le64_to_cpu(dus->s.msec);
1125 }
1126
1127 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1128 {
1129         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1130
1131         if (!client->disk_stats_shown) {
1132                 client->disk_stats_shown = true;
1133                 log_info("\nDisk stats (read/write):\n");
1134         }
1135
1136         if (output_format & FIO_OUTPUT_JSON) {
1137                 struct json_object *duobj;
1138                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1139                 duobj = json_array_last_value_object(du_array);
1140                 json_object_add_client_info(duobj, client);
1141         }
1142         if (output_format & FIO_OUTPUT_TERSE)
1143                 print_disk_util(&du->dus, &du->agg, 1, NULL);
1144         if (output_format & FIO_OUTPUT_NORMAL)
1145                 print_disk_util(&du->dus, &du->agg, 0, NULL);
1146 }
1147
1148 static void convert_jobs_eta(struct jobs_eta *je)
1149 {
1150         int i;
1151
1152         je->nr_running          = le32_to_cpu(je->nr_running);
1153         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1154         je->nr_pending          = le32_to_cpu(je->nr_pending);
1155         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1156         je->files_open          = le32_to_cpu(je->files_open);
1157
1158         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1159                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1160                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1161                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1162                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1163                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1164                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1165         }
1166
1167         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1168         je->eta_sec             = le64_to_cpu(je->eta_sec);
1169         je->nr_threads          = le32_to_cpu(je->nr_threads);
1170         je->is_pow2             = le32_to_cpu(je->is_pow2);
1171         je->unit_base           = le32_to_cpu(je->unit_base);
1172         je->sig_figs            = le32_to_cpu(je->sig_figs);
1173 }
1174
1175 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1176 {
1177         int i;
1178
1179         dst->nr_running         += je->nr_running;
1180         dst->nr_ramp            += je->nr_ramp;
1181         dst->nr_pending         += je->nr_pending;
1182         dst->nr_setting_up      += je->nr_setting_up;
1183         dst->files_open         += je->files_open;
1184
1185         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1186                 dst->m_rate[i]  += je->m_rate[i];
1187                 dst->t_rate[i]  += je->t_rate[i];
1188                 dst->m_iops[i]  += je->m_iops[i];
1189                 dst->t_iops[i]  += je->t_iops[i];
1190                 dst->rate[i]    += je->rate[i];
1191                 dst->iops[i]    += je->iops[i];
1192         }
1193
1194         dst->elapsed_sec        += je->elapsed_sec;
1195
1196         if (je->eta_sec > dst->eta_sec)
1197                 dst->eta_sec = je->eta_sec;
1198
1199         dst->nr_threads         += je->nr_threads;
1200
1201         /*
1202          * This wont be correct for multiple strings, but at least it
1203          * works for the basic cases.
1204          */
1205         strcpy((char *) dst->run_str, (char *) je->run_str);
1206 }
1207
1208 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1209 {
1210         struct fio_net_cmd_reply *reply = NULL;
1211         struct flist_head *entry;
1212
1213         flist_for_each(entry, &client->cmd_list) {
1214                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1215
1216                 if (cmd->tag == (uintptr_t) reply)
1217                         break;
1218
1219                 reply = NULL;
1220         }
1221
1222         if (!reply) {
1223                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1224                 return false;
1225         }
1226
1227         flist_del(&reply->list);
1228         cmd->tag = reply->saved_tag;
1229         free(reply);
1230         return true;
1231 }
1232
1233 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1234 {
1235         do {
1236                 struct fio_net_cmd_reply *reply = NULL;
1237                 struct flist_head *entry;
1238
1239                 flist_for_each(entry, &client->cmd_list) {
1240                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1241
1242                         if (tag == (uintptr_t) reply)
1243                                 break;
1244
1245                         reply = NULL;
1246                 }
1247
1248                 if (!reply)
1249                         break;
1250
1251                 usleep(1000);
1252         } while (1);
1253
1254         return 0;
1255 }
1256
1257 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1258 {
1259         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1260         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1261
1262         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1263
1264         assert(client->eta_in_flight == eta);
1265
1266         client->eta_in_flight = NULL;
1267         flist_del_init(&client->eta_list);
1268         client->eta_timeouts = 0;
1269
1270         if (client->ops->jobs_eta)
1271                 client->ops->jobs_eta(client, je);
1272
1273         fio_client_sum_jobs_eta(&eta->eta, je);
1274         fio_client_dec_jobs_eta(eta, client->ops->eta);
1275 }
1276
1277 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1278                                       uint64_t sample_size)
1279 {
1280         struct io_sample *s;
1281         int log_offset;
1282         uint64_t i, j, nr_samples;
1283         struct io_u_plat_entry *entry;
1284         uint64_t *io_u_plat;
1285
1286         int stride = 1 << hist_coarseness;
1287
1288         if (!sample_size)
1289                 return;
1290
1291         s = __get_sample(samples, 0, 0);
1292         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1293
1294         nr_samples = sample_size / __log_entry_sz(log_offset);
1295
1296         for (i = 0; i < nr_samples; i++) {
1297
1298                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1299                         i * sizeof(struct io_u_plat_entry));
1300
1301                 entry = s->data.plat_entry;
1302                 io_u_plat = entry->io_u_plat;
1303
1304                 fprintf(f, "%lu, %u, %u, ", (unsigned long) s->time,
1305                                                 io_sample_ddir(s), s->bs);
1306                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1307                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1308                 }
1309                 fprintf(f, "%llu\n", (unsigned long long)
1310                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1311
1312         }
1313 }
1314
1315 static int fio_client_handle_iolog(struct fio_client *client,
1316                                    struct fio_net_cmd *cmd)
1317 {
1318         struct cmd_iolog_pdu *pdu = NULL;
1319         bool store_direct;
1320         char *log_pathname = NULL;
1321         int ret = 0;
1322
1323         pdu = convert_iolog(cmd, &store_direct);
1324         if (!pdu) {
1325                 log_err("fio: failed converting IO log\n");
1326                 ret = 1;
1327                 goto out;
1328         }
1329
1330         /* allocate buffer big enough for next sprintf() call */
1331         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1332                         strlen(client->hostname));
1333         if (!log_pathname) {
1334                 log_err("fio: memory allocation of unique pathname failed\n");
1335                 ret = -1;
1336                 goto out;
1337         }
1338         /* generate a unique pathname for the log file using hostname */
1339         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1340
1341         if (store_direct) {
1342                 ssize_t ret;
1343                 size_t sz;
1344                 int fd;
1345
1346                 fd = open((const char *) log_pathname,
1347                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1348                 if (fd < 0) {
1349                         log_err("fio: open log %s: %s\n",
1350                                 log_pathname, strerror(errno));
1351                         ret = 1;
1352                         goto out;
1353                 }
1354
1355                 sz = cmd->pdu_len - sizeof(*pdu);
1356                 ret = write(fd, pdu->samples, sz);
1357                 close(fd);
1358
1359                 if (ret != sz) {
1360                         log_err("fio: short write on compressed log\n");
1361                         ret = 1;
1362                         goto out;
1363                 }
1364
1365                 ret = 0;
1366         } else {
1367                 FILE *f;
1368                 f = fopen((const char *) log_pathname, "w");
1369                 if (!f) {
1370                         log_err("fio: fopen log %s : %s\n",
1371                                 log_pathname, strerror(errno));
1372                         ret = 1;
1373                         goto out;
1374                 }
1375
1376                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1377                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1378                                            pdu->nr_samples * sizeof(struct io_sample));
1379                 } else {
1380                         flush_samples(f, pdu->samples,
1381                                         pdu->nr_samples * sizeof(struct io_sample));
1382                 }
1383                 fclose(f);
1384                 ret = 0;
1385         }
1386
1387 out:
1388         if (pdu && pdu != (void *) cmd->payload)
1389                 free(pdu);
1390
1391         if (log_pathname)
1392                 free(log_pathname);
1393
1394         return ret;
1395 }
1396
1397 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1398 {
1399         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1400         const char *os, *arch;
1401         char bit[16];
1402
1403         os = fio_get_os_string(probe->os);
1404         if (!os)
1405                 os = "unknown";
1406
1407         arch = fio_get_arch_string(probe->arch);
1408         if (!arch)
1409                 os = "unknown";
1410
1411         sprintf(bit, "%d-bit", probe->bpp * 8);
1412         probe->flags = le64_to_cpu(probe->flags);
1413
1414         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1415                 probe->hostname, probe->bigendian, bit, os, arch,
1416                 probe->fio_version, (unsigned long) probe->flags);
1417
1418         if (!client->name)
1419                 client->name = strdup((char *) probe->hostname);
1420 }
1421
1422 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1423 {
1424         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1425
1426         client->state = Client_started;
1427         client->jobs = le32_to_cpu(pdu->jobs);
1428         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1429
1430         if (client->jobs) {
1431                 int i;
1432
1433                 if (client->opt_lists)
1434                         free(client->opt_lists);
1435
1436                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1437                 for (i = 0; i < client->jobs; i++)
1438                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1439         }
1440
1441         sum_stat_clients += client->nr_stat;
1442 }
1443
1444 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
1445 {
1446         if (client->error)
1447                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1448 }
1449
1450 static void convert_stop(struct fio_net_cmd *cmd)
1451 {
1452         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1453
1454         pdu->error = le32_to_cpu(pdu->error);
1455 }
1456
1457 static void convert_text(struct fio_net_cmd *cmd)
1458 {
1459         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1460
1461         pdu->level      = le32_to_cpu(pdu->level);
1462         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1463         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1464         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1465 }
1466
1467 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1468                                               struct cmd_iolog_pdu *pdu)
1469 {
1470 #ifdef CONFIG_ZLIB
1471         struct cmd_iolog_pdu *ret;
1472         z_stream stream;
1473         uint32_t nr_samples;
1474         size_t total;
1475         char *p;
1476
1477         stream.zalloc = Z_NULL;
1478         stream.zfree = Z_NULL;
1479         stream.opaque = Z_NULL;
1480         stream.avail_in = 0;
1481         stream.next_in = Z_NULL;
1482
1483         if (inflateInit(&stream) != Z_OK)
1484                 return NULL;
1485
1486         /*
1487          * Get header first, it's not compressed
1488          */
1489         nr_samples = le64_to_cpu(pdu->nr_samples);
1490
1491         if (pdu->log_type == IO_LOG_TYPE_HIST)
1492                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1493                                         sizeof(struct io_u_plat_entry));
1494         else
1495                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1496         ret = malloc(total + sizeof(*pdu));
1497         ret->nr_samples = nr_samples;
1498
1499         memcpy(ret, pdu, sizeof(*pdu));
1500
1501         p = (char *) ret + sizeof(*pdu);
1502
1503         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1504         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1505         while (stream.avail_in) {
1506                 unsigned int this_chunk = 65536;
1507                 unsigned int this_len;
1508                 int err;
1509
1510                 if (this_chunk > total)
1511                         this_chunk = total;
1512
1513                 stream.avail_out = this_chunk;
1514                 stream.next_out = (void *)p;
1515                 err = inflate(&stream, Z_NO_FLUSH);
1516                 /* may be Z_OK, or Z_STREAM_END */
1517                 if (err < 0) {
1518                         log_err("fio: inflate error %d\n", err);
1519                         free(ret);
1520                         ret = NULL;
1521                         goto err;
1522                 }
1523
1524                 this_len = this_chunk - stream.avail_out;
1525                 p += this_len;
1526                 total -= this_len;
1527         }
1528
1529 err:
1530         inflateEnd(&stream);
1531         return ret;
1532 #else
1533         return NULL;
1534 #endif
1535 }
1536
1537 /*
1538  * This has been compressed on the server side, since it can be big.
1539  * Uncompress here.
1540  */
1541 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1542                                            bool *store_direct)
1543 {
1544         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1545         struct cmd_iolog_pdu *ret;
1546         uint64_t i;
1547         int compressed;
1548         void *samples;
1549
1550         *store_direct = false;
1551
1552         /*
1553          * Convert if compressed and we support it. If it's not
1554          * compressed, we need not do anything.
1555          */
1556         compressed = le32_to_cpu(pdu->compressed);
1557         if (compressed == XMIT_COMPRESSED) {
1558 #ifndef CONFIG_ZLIB
1559                 log_err("fio: server sent compressed data by mistake\n");
1560                 return NULL;
1561 #endif
1562                 ret = convert_iolog_gz(cmd, pdu);
1563                 if (!ret) {
1564                         log_err("fio: failed decompressing log\n");
1565                         return NULL;
1566                 }
1567         } else if (compressed == STORE_COMPRESSED) {
1568                 *store_direct = true;
1569                 ret = pdu;
1570         } else
1571                 ret = pdu;
1572
1573         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1574         ret->thread_number      = le32_to_cpu(ret->thread_number);
1575         ret->log_type           = le32_to_cpu(ret->log_type);
1576         ret->compressed         = le32_to_cpu(ret->compressed);
1577         ret->log_offset         = le32_to_cpu(ret->log_offset);
1578         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1579
1580         if (*store_direct)
1581                 return ret;
1582
1583         samples = &ret->samples[0];
1584         for (i = 0; i < ret->nr_samples; i++) {
1585                 struct io_sample *s;
1586
1587                 s = __get_sample(samples, ret->log_offset, i);
1588                 if (ret->log_type == IO_LOG_TYPE_HIST)
1589                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1590
1591                 s->time         = le64_to_cpu(s->time);
1592                 s->data.val     = le64_to_cpu(s->data.val);
1593                 s->__ddir       = le32_to_cpu(s->__ddir);
1594                 s->bs           = le32_to_cpu(s->bs);
1595
1596                 if (ret->log_offset) {
1597                         struct io_sample_offset *so = (void *) s;
1598
1599                         so->offset = le64_to_cpu(so->offset);
1600                 }
1601
1602                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1603                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1604                         s->data.plat_entry->list.next = NULL;
1605                         s->data.plat_entry->list.prev = NULL;
1606                 }
1607         }
1608
1609         return ret;
1610 }
1611
1612 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1613                            size_t size, uint64_t tag)
1614 {
1615         rep->error = cpu_to_le32(rep->error);
1616         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1617 }
1618
1619 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1620                          uint64_t tag)
1621 {
1622         struct cmd_sendfile_reply *rep;
1623         struct stat sb;
1624         size_t size;
1625         int fd;
1626
1627         size = sizeof(*rep);
1628         rep = malloc(size);
1629
1630         if (stat((char *)pdu->path, &sb) < 0) {
1631 fail:
1632                 rep->error = errno;
1633                 sendfile_reply(client->fd, rep, size, tag);
1634                 free(rep);
1635                 return 1;
1636         }
1637
1638         size += sb.st_size;
1639         rep = realloc(rep, size);
1640         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1641
1642         fd = open((char *)pdu->path, O_RDONLY);
1643         if (fd == -1 )
1644                 goto fail;
1645
1646         rep->error = read_data(fd, &rep->data, sb.st_size);
1647         sendfile_reply(client->fd, rep, size, tag);
1648         free(rep);
1649         close(fd);
1650         return 0;
1651 }
1652
1653 int fio_handle_client(struct fio_client *client)
1654 {
1655         struct client_ops *ops = client->ops;
1656         struct fio_net_cmd *cmd;
1657         int size;
1658
1659         dprint(FD_NET, "client: handle %s\n", client->hostname);
1660
1661         cmd = fio_net_recv_cmd(client->fd, true);
1662         if (!cmd)
1663                 return 0;
1664
1665         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1666                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1667
1668         client->last_cmd = cmd->opcode;
1669
1670         switch (cmd->opcode) {
1671         case FIO_NET_CMD_QUIT:
1672                 if (ops->quit)
1673                         ops->quit(client, cmd);
1674                 remove_client(client);
1675                 break;
1676         case FIO_NET_CMD_TEXT:
1677                 convert_text(cmd);
1678                 ops->text(client, cmd);
1679                 break;
1680         case FIO_NET_CMD_DU: {
1681                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1682
1683                 convert_dus(&du->dus);
1684                 convert_agg(&du->agg);
1685
1686                 ops->disk_util(client, cmd);
1687                 break;
1688                 }
1689         case FIO_NET_CMD_TS: {
1690                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1691
1692                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1693                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1694                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1695
1696                         size = le64_to_cpu(p->ts.ss_dur);
1697                         p->ts.ss_iops_data = (uint64_t *) ((struct cmd_ts_pdu *)cmd->payload + 1);
1698                         p->ts.ss_bw_data = p->ts.ss_iops_data + size;
1699                 }
1700
1701                 convert_ts(&p->ts, &p->ts);
1702                 convert_gs(&p->rs, &p->rs);
1703
1704                 ops->thread_status(client, cmd);
1705                 break;
1706                 }
1707         case FIO_NET_CMD_GS: {
1708                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1709
1710                 convert_gs(gs, gs);
1711
1712                 ops->group_stats(client, cmd);
1713                 break;
1714                 }
1715         case FIO_NET_CMD_ETA: {
1716                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1717
1718                 if (!remove_reply_cmd(client, cmd))
1719                         break;
1720                 convert_jobs_eta(je);
1721                 handle_eta(client, cmd);
1722                 break;
1723                 }
1724         case FIO_NET_CMD_PROBE:
1725                 remove_reply_cmd(client, cmd);
1726                 ops->probe(client, cmd);
1727                 break;
1728         case FIO_NET_CMD_SERVER_START:
1729                 client->state = Client_running;
1730                 if (ops->job_start)
1731                         ops->job_start(client, cmd);
1732                 break;
1733         case FIO_NET_CMD_START: {
1734                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1735
1736                 pdu->jobs = le32_to_cpu(pdu->jobs);
1737                 ops->start(client, cmd);
1738                 break;
1739                 }
1740         case FIO_NET_CMD_STOP: {
1741                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1742
1743                 convert_stop(cmd);
1744                 client->state = Client_stopped;
1745                 client->error = le32_to_cpu(pdu->error);
1746                 client->signal = le32_to_cpu(pdu->signal);
1747                 ops->stop(client, cmd);
1748                 break;
1749                 }
1750         case FIO_NET_CMD_ADD_JOB: {
1751                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1752
1753                 client->thread_number = le32_to_cpu(pdu->thread_number);
1754                 client->groupid = le32_to_cpu(pdu->groupid);
1755
1756                 if (ops->add_job)
1757                         ops->add_job(client, cmd);
1758                 break;
1759                 }
1760         case FIO_NET_CMD_IOLOG:
1761                 fio_client_handle_iolog(client, cmd);
1762                 break;
1763         case FIO_NET_CMD_UPDATE_JOB:
1764                 ops->update_job(client, cmd);
1765                 remove_reply_cmd(client, cmd);
1766                 break;
1767         case FIO_NET_CMD_VTRIGGER: {
1768                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1769                 char buf[128];
1770                 int off = 0;
1771
1772                 if (aux_path) {
1773                         strcpy(buf, aux_path);
1774                         off = strlen(buf);
1775                 }
1776
1777                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1778                 exec_trigger(trigger_cmd);
1779                 break;
1780                 }
1781         case FIO_NET_CMD_SENDFILE: {
1782                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1783                 fio_send_file(client, pdu, cmd->tag);
1784                 break;
1785                 }
1786         case FIO_NET_CMD_JOB_OPT: {
1787                 handle_job_opt(client, cmd);
1788                 break;
1789         }
1790         default:
1791                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1792                 break;
1793         }
1794
1795         free(cmd);
1796         return 1;
1797 }
1798
1799 int fio_clients_send_trigger(const char *cmd)
1800 {
1801         struct flist_head *entry;
1802         struct fio_client *client;
1803         size_t slen;
1804
1805         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1806
1807         if (!cmd)
1808                 slen = 0;
1809         else
1810                 slen = strlen(cmd);
1811
1812         flist_for_each(entry, &client_list) {
1813                 struct cmd_vtrigger_pdu *pdu;
1814
1815                 client = flist_entry(entry, struct fio_client, list);
1816
1817                 pdu = malloc(sizeof(*pdu) + slen);
1818                 pdu->len = cpu_to_le16((uint16_t) slen);
1819                 if (slen)
1820                         memcpy(pdu->cmd, cmd, slen);
1821                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1822                                         sizeof(*pdu) + slen, NULL, NULL);
1823                 free(pdu);
1824         }
1825
1826         return 0;
1827 }
1828
1829 static void request_client_etas(struct client_ops *ops)
1830 {
1831         struct fio_client *client;
1832         struct flist_head *entry;
1833         struct client_eta *eta;
1834         int skipped = 0;
1835
1836         if (eta_print == FIO_ETA_NEVER)
1837                 return;
1838
1839         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1840
1841         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1842         eta->pending = nr_clients;
1843
1844         flist_for_each(entry, &client_list) {
1845                 client = flist_entry(entry, struct fio_client, list);
1846
1847                 if (!flist_empty(&client->eta_list)) {
1848                         skipped++;
1849                         continue;
1850                 }
1851                 if (client->state != Client_running)
1852                         continue;
1853
1854                 assert(!client->eta_in_flight);
1855                 flist_add_tail(&client->eta_list, &eta_list);
1856                 client->eta_in_flight = eta;
1857                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1858                                         (uintptr_t) eta, &client->cmd_list);
1859         }
1860
1861         while (skipped--) {
1862                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1863                         break;
1864         }
1865
1866         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1867 }
1868
1869 /*
1870  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
1871  */
1872 static int handle_cmd_timeout(struct fio_client *client,
1873                               struct fio_net_cmd_reply *reply)
1874 {
1875         uint16_t reply_opcode = reply->opcode;
1876
1877         flist_del(&reply->list);
1878         free(reply);
1879
1880         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
1881                 return 1;
1882
1883         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
1884
1885         flist_del_init(&client->eta_list);
1886         if (client->eta_in_flight) {
1887                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
1888                 client->eta_in_flight = NULL;
1889         }
1890
1891         /*
1892          * If we fail 5 in a row, give up...
1893          */
1894         if (client->eta_timeouts++ > 5)
1895                 return 1;
1896
1897         return 0;
1898 }
1899
1900 static int client_check_cmd_timeout(struct fio_client *client,
1901                                     struct timespec *now)
1902 {
1903         struct fio_net_cmd_reply *reply;
1904         struct flist_head *entry, *tmp;
1905         int ret = 0;
1906
1907         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1908                 unsigned int op;
1909
1910                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1911
1912                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
1913                         continue;
1914
1915                 op = reply->opcode;
1916                 if (!handle_cmd_timeout(client, reply))
1917                         continue;
1918
1919                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1920                                                 fio_server_op(op));
1921                 ret = 1;
1922         }
1923
1924         return flist_empty(&client->cmd_list) && ret;
1925 }
1926
1927 static int fio_check_clients_timed_out(void)
1928 {
1929         struct fio_client *client;
1930         struct flist_head *entry, *tmp;
1931         struct timespec ts;
1932         int ret = 0;
1933
1934         fio_gettime(&ts, NULL);
1935
1936         flist_for_each_safe(entry, tmp, &client_list) {
1937                 client = flist_entry(entry, struct fio_client, list);
1938
1939                 if (flist_empty(&client->cmd_list))
1940                         continue;
1941
1942                 if (!client_check_cmd_timeout(client, &ts))
1943                         continue;
1944
1945                 if (client->ops->timed_out)
1946                         client->ops->timed_out(client);
1947                 else
1948                         log_err("fio: client %s timed out\n", client->hostname);
1949
1950                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
1951                         client->error = ETIMEDOUT;
1952                 else
1953                         log_info("fio: ignoring timeout due to vtrigger\n");
1954                 remove_client(client);
1955                 ret = 1;
1956         }
1957
1958         return ret;
1959 }
1960
1961 int fio_handle_clients(struct client_ops *ops)
1962 {
1963         struct pollfd *pfds;
1964         int i, ret = 0, retval = 0;
1965
1966         fio_gettime(&eta_ts, NULL);
1967
1968         pfds = malloc(nr_clients * sizeof(struct pollfd));
1969
1970         init_thread_stat(&client_ts);
1971         init_group_run_stat(&client_gs);
1972
1973         while (!exit_backend && nr_clients) {
1974                 struct flist_head *entry, *tmp;
1975                 struct fio_client *client;
1976
1977                 i = 0;
1978                 flist_for_each_safe(entry, tmp, &client_list) {
1979                         client = flist_entry(entry, struct fio_client, list);
1980
1981                         if (!client->sent_job && !client->ops->stay_connected &&
1982                             flist_empty(&client->cmd_list)) {
1983                                 remove_client(client);
1984                                 continue;
1985                         }
1986
1987                         pfds[i].fd = client->fd;
1988                         pfds[i].events = POLLIN;
1989                         i++;
1990                 }
1991
1992                 if (!nr_clients)
1993                         break;
1994
1995                 assert(i == nr_clients);
1996
1997                 do {
1998                         struct timespec ts;
1999                         int timeout;
2000
2001                         fio_gettime(&ts, NULL);
2002                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2003                                 request_client_etas(ops);
2004                                 memcpy(&eta_ts, &ts, sizeof(ts));
2005
2006                                 if (fio_check_clients_timed_out())
2007                                         break;
2008                         }
2009
2010                         check_trigger_file();
2011
2012                         timeout = min(100u, ops->eta_msec);
2013
2014                         ret = poll(pfds, nr_clients, timeout);
2015                         if (ret < 0) {
2016                                 if (errno == EINTR)
2017                                         continue;
2018                                 log_err("fio: poll clients: %s\n", strerror(errno));
2019                                 break;
2020                         } else if (!ret)
2021                                 continue;
2022                 } while (ret <= 0);
2023
2024                 for (i = 0; i < nr_clients; i++) {
2025                         if (!(pfds[i].revents & POLLIN))
2026                                 continue;
2027
2028                         client = find_client_by_fd(pfds[i].fd);
2029                         if (!client) {
2030                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2031                                 continue;
2032                         }
2033                         if (!fio_handle_client(client)) {
2034                                 log_info("client: host=%s disconnected\n",
2035                                                 client->hostname);
2036                                 remove_client(client);
2037                                 retval = 1;
2038                         } else if (client->error)
2039                                 retval = 1;
2040                         fio_put_client(client);
2041                 }
2042         }
2043
2044         fio_client_json_fini();
2045
2046         free(pfds);
2047         return retval || error_clients;
2048 }