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);
  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 static void client_display_thread_status(struct jobs_eta *je);
  36
  37 struct client_ops fio_client_ops = {
  38         .text           = handle_text,
  39         .disk_util      = handle_du,
  40         .thread_status  = handle_ts,
  41         .group_stats    = handle_gs,
  42         .stop           = handle_stop,
  43         .start          = handle_start,
  44         .eta            = client_display_thread_status,
  45         .probe          = handle_probe,
  46         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  47         .client_type    = FIO_CLIENT_TYPE_CLI,
  48 };
  49
  50 static struct timespec eta_ts;
  51
  52 static FLIST_HEAD(client_list);
  53 static FLIST_HEAD(eta_list);
  54
  55 static FLIST_HEAD(arg_list);
  56
  57 struct thread_stat client_ts;
  58 struct group_run_stats client_gs;
  59 int sum_stat_clients;
  60
  61 static int sum_stat_nr;
  62 static struct json_object *root = NULL;
  63 static struct json_object *job_opt_object = NULL;
  64 static struct json_array *clients_array = NULL;
  65 static struct json_array *du_array = NULL;
  66
  67 static int error_clients;
  68
  69 #define FIO_CLIENT_HASH_BITS    7
  70 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  71 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  72 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  73
  74 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *, bool *);
  75
  76 static void fio_client_add_hash(struct fio_client *client)
  77 {
  78         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  79
  80         bucket &= FIO_CLIENT_HASH_MASK;
  81         flist_add(&client->hash_list, &client_hash[bucket]);
  82 }
  83
  84 static void fio_client_remove_hash(struct fio_client *client)
  85 {
  86         if (!flist_empty(&client->hash_list))
  87                 flist_del_init(&client->hash_list);
  88 }
  89
  90 static void fio_init fio_client_hash_init(void)
  91 {
  92         int i;
  93
  94         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  95                 INIT_FLIST_HEAD(&client_hash[i]);
  96 }
  97
  98 static int read_data(int fd, void *data, size_t size)
  99 {
 100         ssize_t ret;
 101
 102         while (size) {
 103                 ret = read(fd, data, size);
 104                 if (ret < 0) {
 105                         if (errno == EAGAIN || errno == EINTR)
 106                                 continue;
 107                         break;
 108                 } else if (!ret)
 109                         break;
 110                 else {
 111                         data += ret;
 112                         size -= ret;
 113                 }
 114         }
 115
 116         if (size)
 117                 return EAGAIN;
 118
 119         return 0;
 120 }
 121
 122 static int read_ini_data(int fd, void *data, size_t size)
 123 {
 124         char *p = data;
 125         int ret = 0;
 126         FILE *fp;
 127         int dupfd;
 128
 129         dupfd = dup(fd);
 130         if (dupfd < 0)
 131                 return errno;
 132
 133         fp = fdopen(dupfd, "r");
 134         if (!fp) {
 135                 ret = errno;
 136                 close(dupfd);
 137                 goto out;
 138         }
 139
 140         while (1) {
 141                 ssize_t len;
 142                 char buf[OPT_LEN_MAX+1], *sub;
 143
 144                 if (!fgets(buf, sizeof(buf), fp)) {
 145                         if (ferror(fp)) {
 146                                 if (errno == EAGAIN || errno == EINTR)
 147                                         continue;
 148                                 ret = errno;
 149                         }
 150                         break;
 151                 }
 152
 153                 sub = fio_option_dup_subs(buf);
 154                 len = strlen(sub);
 155                 if (len + 1 > size) {
 156                         log_err("fio: no space left to read data\n");
 157                         free(sub);
 158                         ret = ENOSPC;
 159                         break;
 160                 }
 161
 162                 memcpy(p, sub, len);
 163                 free(sub);
 164                 p += len;
 165                 *p = '\0';
 166                 size -= len;
 167         }
 168
 169         fclose(fp);
 170 out:
 171         return ret;
 172 }
 173
 174 static void fio_client_json_init(void)
 175 {
 176         char time_buf[32];
 177         time_t time_p;
 178
 179         if (!(output_format & FIO_OUTPUT_JSON))
 180                 return;
 181
 182         time(&time_p);
 183         os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
 184         time_buf[strlen(time_buf) - 1] = '\0';
 185
 186         root = json_create_object();
 187         json_object_add_value_string(root, "fio version", fio_version_string);
 188         json_object_add_value_int(root, "timestamp", time_p);
 189         json_object_add_value_string(root, "time", time_buf);
 190
 191         job_opt_object = json_create_object();
 192         json_object_add_value_object(root, "global options", job_opt_object);
 193         clients_array = json_create_array();
 194         json_object_add_value_array(root, "client_stats", clients_array);
 195         du_array = json_create_array();
 196         json_object_add_value_array(root, "disk_util", du_array);
 197 }
 198
 199 static void fio_client_json_fini(void)
 200 {
 201         if (!(output_format & FIO_OUTPUT_JSON))
 202                 return;
 203
 204         log_info("\n");
 205         json_print_object(root, NULL);
 206         log_info("\n");
 207         json_free_object(root);
 208         root = NULL;
 209         clients_array = NULL;
 210         du_array = NULL;
 211 }
 212
 213 static struct fio_client *find_client_by_fd(int fd)
 214 {
 215         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 216         struct fio_client *client;
 217         struct flist_head *entry;
 218
 219         flist_for_each(entry, &client_hash[bucket]) {
 220                 client = flist_entry(entry, struct fio_client, hash_list);
 221
 222                 if (client->fd == fd) {
 223                         client->refs++;
 224                         return client;
 225                 }
 226         }
 227
 228         return NULL;
 229 }
 230
 231 void fio_put_client(struct fio_client *client)
 232 {
 233         if (--client->refs)
 234                 return;
 235
 236         free(client->hostname);
 237         if (client->argv)
 238                 free(client->argv);
 239         if (client->name)
 240                 free(client->name);
 241         while (client->nr_files) {
 242                 struct client_file *cf = &client->files[--client->nr_files];
 243
 244                 free(cf->file);
 245         }
 246         if (client->files)
 247                 free(client->files);
 248         if (client->opt_lists)
 249                 free(client->opt_lists);
 250
 251         if (!client->did_stat)
 252                 sum_stat_clients--;
 253
 254         if (client->error)
 255                 error_clients++;
 256
 257         free(client);
 258 }
 259
 260 static int fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 261 {
 262         if (!--eta->pending) {
 263                 eta_fn(&eta->eta);
 264                 free(eta);
 265                 return 0;
 266         }
 267
 268         return 1;
 269 }
 270
 271 static void fio_drain_client_text(struct fio_client *client)
 272 {
 273         do {
 274                 struct fio_net_cmd *cmd;
 275
 276                 cmd = fio_net_recv_cmd(client->fd, false);
 277                 if (!cmd)
 278                         break;
 279
 280                 if (cmd->opcode == FIO_NET_CMD_TEXT) {
 281                         convert_text(cmd);
 282                         client->ops->text(client, cmd);
 283                 }
 284
 285                 free(cmd);
 286         } while (1);
 287 }
 288
 289 static void remove_client(struct fio_client *client)
 290 {
 291         assert(client->refs);
 292
 293         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 294
 295         fio_drain_client_text(client);
 296
 297         if (!flist_empty(&client->list))
 298                 flist_del_init(&client->list);
 299
 300         fio_client_remove_hash(client);
 301
 302         if (!flist_empty(&client->eta_list)) {
 303                 flist_del_init(&client->eta_list);
 304                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 305         }
 306
 307         close(client->fd);
 308         client->fd = -1;
 309
 310         if (client->ops->removed)
 311                 client->ops->removed(client);
 312
 313         nr_clients--;
 314         fio_put_client(client);
 315 }
 316
 317 struct fio_client *fio_get_client(struct fio_client *client)
 318 {
 319         client->refs++;
 320         return client;
 321 }
 322
 323 static void __fio_client_add_cmd_option(struct fio_client *client,
 324                                         const char *opt)
 325 {
 326         int index;
 327
 328         index = client->argc++;
 329         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 330         client->argv[index] = strdup(opt);
 331         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 332 }
 333
 334 void fio_client_add_cmd_option(void *cookie, const char *opt)
 335 {
 336         struct fio_client *client = cookie;
 337         struct flist_head *entry;
 338
 339         if (!client || !opt)
 340                 return;
 341
 342         __fio_client_add_cmd_option(client, opt);
 343
 344         /*
 345          * Duplicate arguments to shared client group
 346          */
 347         flist_for_each(entry, &arg_list) {
 348                 client = flist_entry(entry, struct fio_client, arg_list);
 349
 350                 __fio_client_add_cmd_option(client, opt);
 351         }
 352 }
 353
 354 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 355                                            const char *hostname, int type,
 356                                            int port)
 357 {
 358         struct fio_client *client;
 359
 360         client = malloc(sizeof(*client));
 361         memset(client, 0, sizeof(*client));
 362
 363         INIT_FLIST_HEAD(&client->list);
 364         INIT_FLIST_HEAD(&client->hash_list);
 365         INIT_FLIST_HEAD(&client->arg_list);
 366         INIT_FLIST_HEAD(&client->eta_list);
 367         INIT_FLIST_HEAD(&client->cmd_list);
 368
 369         client->hostname = strdup(hostname);
 370
 371         if (type == Fio_client_socket)
 372                 client->is_sock = true;
 373         else {
 374                 int ipv6;
 375
 376                 ipv6 = type == Fio_client_ipv6;
 377                 if (fio_server_parse_host(hostname, ipv6,
 378                                                 &client->addr.sin_addr,
 379                                                 &client->addr6.sin6_addr))
 380                         goto err;
 381
 382                 client->port = port;
 383         }
 384
 385         client->fd = -1;
 386         client->ops = ops;
 387         client->refs = 1;
 388         client->type = ops->client_type;
 389
 390         __fio_client_add_cmd_option(client, "fio");
 391
 392         flist_add(&client->list, &client_list);
 393         nr_clients++;
 394         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 395         return client;
 396 err:
 397         free(client);
 398         return NULL;
 399 }
 400
 401 int fio_client_add_ini_file(void *cookie, const char *ini_file, bool remote)
 402 {
 403         struct fio_client *client = cookie;
 404         struct client_file *cf;
 405         size_t new_size;
 406         void *new_files;
 407
 408         if (!client)
 409                 return 1;
 410
 411         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 412
 413         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 414         new_files = realloc(client->files, new_size);
 415         if (!new_files)
 416                 return 1;
 417
 418         client->files = new_files;
 419         cf = &client->files[client->nr_files];
 420         cf->file = strdup(ini_file);
 421         cf->remote = remote;
 422         client->nr_files++;
 423         return 0;
 424 }
 425
 426 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 427 {
 428         struct fio_client *existing = *cookie;
 429         struct fio_client *client;
 430
 431         if (existing) {
 432                 /*
 433                  * We always add our "exec" name as the option, hence 1
 434                  * means empty.
 435                  */
 436                 if (existing->argc == 1)
 437                         flist_add_tail(&existing->arg_list, &arg_list);
 438                 else {
 439                         while (!flist_empty(&arg_list))
 440                                 flist_del_init(arg_list.next);
 441                 }
 442         }
 443
 444         client = malloc(sizeof(*client));
 445         memset(client, 0, sizeof(*client));
 446
 447         INIT_FLIST_HEAD(&client->list);
 448         INIT_FLIST_HEAD(&client->hash_list);
 449         INIT_FLIST_HEAD(&client->arg_list);
 450         INIT_FLIST_HEAD(&client->eta_list);
 451         INIT_FLIST_HEAD(&client->cmd_list);
 452
 453         if (fio_server_parse_string(hostname, &client->hostname,
 454                                         &client->is_sock, &client->port,
 455                                         &client->addr.sin_addr,
 456                                         &client->addr6.sin6_addr,
 457                                         &client->ipv6))
 458                 return -1;
 459
 460         client->fd = -1;
 461         client->ops = ops;
 462         client->refs = 1;
 463         client->type = ops->client_type;
 464
 465         __fio_client_add_cmd_option(client, "fio");
 466
 467         flist_add(&client->list, &client_list);
 468         nr_clients++;
 469         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 470         *cookie = client;
 471         return 0;
 472 }
 473
 474 static const char *server_name(struct fio_client *client, char *buf,
 475                                size_t bufsize)
 476 {
 477         const char *from;
 478
 479         if (client->ipv6)
 480                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 481         else if (client->is_sock)
 482                 from = "sock";
 483         else
 484                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 485
 486         return from;
 487 }
 488
 489 static void probe_client(struct fio_client *client)
 490 {
 491         struct cmd_client_probe_pdu pdu;
 492         const char *sname;
 493         uint64_t tag;
 494         char buf[64];
 495
 496         dprint(FD_NET, "client: send probe\n");
 497
 498 #ifdef CONFIG_ZLIB
 499         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 500 #else
 501         pdu.flags = 0;
 502 #endif
 503
 504         sname = server_name(client, buf, sizeof(buf));
 505         memset(pdu.server, 0, sizeof(pdu.server));
 506         strncpy((char *) pdu.server, sname, sizeof(pdu.server) - 1);
 507
 508         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 509 }
 510
 511 static int fio_client_connect_ip(struct fio_client *client)
 512 {
 513         struct sockaddr *addr;
 514         socklen_t socklen;
 515         int fd, domain;
 516
 517         if (client->ipv6) {
 518                 client->addr6.sin6_family = AF_INET6;
 519                 client->addr6.sin6_port = htons(client->port);
 520                 domain = AF_INET6;
 521                 addr = (struct sockaddr *) &client->addr6;
 522                 socklen = sizeof(client->addr6);
 523         } else {
 524                 client->addr.sin_family = AF_INET;
 525                 client->addr.sin_port = htons(client->port);
 526                 domain = AF_INET;
 527                 addr = (struct sockaddr *) &client->addr;
 528                 socklen = sizeof(client->addr);
 529         }
 530
 531         fd = socket(domain, SOCK_STREAM, 0);
 532         if (fd < 0) {
 533                 int ret = -errno;
 534
 535                 log_err("fio: socket: %s\n", strerror(errno));
 536                 return ret;
 537         }
 538
 539         if (connect(fd, addr, socklen) < 0) {
 540                 int ret = -errno;
 541
 542                 log_err("fio: connect: %s\n", strerror(errno));
 543                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 544                                                                 client->port);
 545                 close(fd);
 546                 return ret;
 547         }
 548
 549         return fd;
 550 }
 551
 552 static int fio_client_connect_sock(struct fio_client *client)
 553 {
 554         struct sockaddr_un *addr = &client->addr_un;
 555         socklen_t len;
 556         int fd;
 557
 558         memset(addr, 0, sizeof(*addr));
 559         addr->sun_family = AF_UNIX;
 560         strncpy(addr->sun_path, client->hostname, sizeof(addr->sun_path) - 1);
 561
 562         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 563         if (fd < 0) {
 564                 int ret = -errno;
 565
 566                 log_err("fio: socket: %s\n", strerror(errno));
 567                 return ret;
 568         }
 569
 570         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 571         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 572                 int ret = -errno;
 573
 574                 log_err("fio: connect; %s\n", strerror(errno));
 575                 close(fd);
 576                 return ret;
 577         }
 578
 579         return fd;
 580 }
 581
 582 int fio_client_connect(struct fio_client *client)
 583 {
 584         int fd;
 585
 586         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 587
 588         if (client->is_sock)
 589                 fd = fio_client_connect_sock(client);
 590         else
 591                 fd = fio_client_connect_ip(client);
 592
 593         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 594
 595         if (fd < 0)
 596                 return fd;
 597
 598         client->fd = fd;
 599         fio_client_add_hash(client);
 600         client->state = Client_connected;
 601
 602         probe_client(client);
 603         return 0;
 604 }
 605
 606 int fio_client_terminate(struct fio_client *client)
 607 {
 608         return fio_net_send_quit(client->fd);
 609 }
 610
 611 static void fio_clients_terminate(void)
 612 {
 613         struct flist_head *entry;
 614         struct fio_client *client;
 615
 616         dprint(FD_NET, "client: terminate clients\n");
 617
 618         flist_for_each(entry, &client_list) {
 619                 client = flist_entry(entry, struct fio_client, list);
 620                 fio_client_terminate(client);
 621         }
 622 }
 623
 624 static void sig_int(int sig)
 625 {
 626         dprint(FD_NET, "client: got signal %d\n", sig);
 627         fio_clients_terminate();
 628 }
 629
 630 static void client_signal_handler(void)
 631 {
 632         struct sigaction act;
 633
 634         memset(&act, 0, sizeof(act));
 635         act.sa_handler = sig_int;
 636         act.sa_flags = SA_RESTART;
 637         sigaction(SIGINT, &act, NULL);
 638
 639         memset(&act, 0, sizeof(act));
 640         act.sa_handler = sig_int;
 641         act.sa_flags = SA_RESTART;
 642         sigaction(SIGTERM, &act, NULL);
 643
 644 /* Windows uses SIGBREAK as a quit signal from other applications */
 645 #ifdef WIN32
 646         memset(&act, 0, sizeof(act));
 647         act.sa_handler = sig_int;
 648         act.sa_flags = SA_RESTART;
 649         sigaction(SIGBREAK, &act, NULL);
 650 #endif
 651
 652         memset(&act, 0, sizeof(act));
 653         act.sa_handler = sig_show_status;
 654         act.sa_flags = SA_RESTART;
 655         sigaction(SIGUSR1, &act, NULL);
 656 }
 657
 658 static int send_client_cmd_line(struct fio_client *client)
 659 {
 660         struct cmd_single_line_pdu *cslp;
 661         struct cmd_line_pdu *clp;
 662         unsigned long offset;
 663         unsigned int *lens;
 664         void *pdu;
 665         size_t mem;
 666         int i, ret;
 667
 668         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 669
 670         lens = malloc(client->argc * sizeof(unsigned int));
 671
 672         /*
 673          * Find out how much mem we need
 674          */
 675         for (i = 0, mem = 0; i < client->argc; i++) {
 676                 lens[i] = strlen(client->argv[i]) + 1;
 677                 mem += lens[i];
 678         }
 679
 680         /*
 681          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 682          */
 683         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 684
 685         pdu = malloc(mem);
 686         clp = pdu;
 687         offset = sizeof(*clp);
 688
 689         for (i = 0; i < client->argc; i++) {
 690                 uint16_t arg_len = lens[i];
 691
 692                 cslp = pdu + offset;
 693                 strcpy((char *) cslp->text, client->argv[i]);
 694                 cslp->len = cpu_to_le16(arg_len);
 695                 offset += sizeof(*cslp) + arg_len;
 696         }
 697
 698         free(lens);
 699         clp->lines = cpu_to_le16(client->argc);
 700         clp->client_type = __cpu_to_le16(client->type);
 701         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 702         free(pdu);
 703         return ret;
 704 }
 705
 706 int fio_clients_connect(void)
 707 {
 708         struct fio_client *client;
 709         struct flist_head *entry, *tmp;
 710         int ret;
 711
 712 #ifdef WIN32
 713         WSADATA wsd;
 714         WSAStartup(MAKEWORD(2, 2), &wsd);
 715 #endif
 716
 717         dprint(FD_NET, "client: connect all\n");
 718
 719         client_signal_handler();
 720
 721         flist_for_each_safe(entry, tmp, &client_list) {
 722                 client = flist_entry(entry, struct fio_client, list);
 723
 724                 ret = fio_client_connect(client);
 725                 if (ret) {
 726                         remove_client(client);
 727                         continue;
 728                 }
 729
 730                 if (client->argc > 1)
 731                         send_client_cmd_line(client);
 732         }
 733
 734         return !nr_clients;
 735 }
 736
 737 int fio_start_client(struct fio_client *client)
 738 {
 739         dprint(FD_NET, "client: start %s\n", client->hostname);
 740         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 741 }
 742
 743 int fio_start_all_clients(void)
 744 {
 745         struct fio_client *client;
 746         struct flist_head *entry, *tmp;
 747         int ret;
 748
 749         dprint(FD_NET, "client: start all\n");
 750
 751         fio_client_json_init();
 752
 753         flist_for_each_safe(entry, tmp, &client_list) {
 754                 client = flist_entry(entry, struct fio_client, list);
 755
 756                 ret = fio_start_client(client);
 757                 if (ret) {
 758                         remove_client(client);
 759                         continue;
 760                 }
 761         }
 762
 763         return flist_empty(&client_list);
 764 }
 765
 766 static int __fio_client_send_remote_ini(struct fio_client *client,
 767                                         const char *filename)
 768 {
 769         struct cmd_load_file_pdu *pdu;
 770         size_t p_size;
 771         int ret;
 772
 773         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 774
 775         p_size = sizeof(*pdu) + strlen(filename) + 1;
 776         pdu = malloc(p_size);
 777         memset(pdu, 0, p_size);
 778         pdu->name_len = strlen(filename);
 779         strcpy((char *) pdu->file, filename);
 780         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 781
 782         client->sent_job = true;
 783         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 784         free(pdu);
 785         return ret;
 786 }
 787
 788 /*
 789  * Send file contents to server backend. We could use sendfile(), but to remain
 790  * more portable lets just read/write the darn thing.
 791  */
 792 static int __fio_client_send_local_ini(struct fio_client *client,
 793                                        const char *filename)
 794 {
 795         struct cmd_job_pdu *pdu;
 796         size_t p_size;
 797         struct stat sb;
 798         char *p;
 799         void *buf;
 800         off_t len;
 801         int fd, ret;
 802
 803         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 804
 805         fd = open(filename, O_RDONLY);
 806         if (fd < 0) {
 807                 ret = -errno;
 808                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 809                 return ret;
 810         }
 811
 812         if (fstat(fd, &sb) < 0) {
 813                 ret = -errno;
 814                 log_err("fio: job file stat: %s\n", strerror(errno));
 815                 close(fd);
 816                 return ret;
 817         }
 818
 819         /*
 820          * Add extra space for variable expansion, but doesn't guarantee.
 821          */
 822         sb.st_size += OPT_LEN_MAX;
 823         p_size = sb.st_size + sizeof(*pdu);
 824         pdu = malloc(p_size);
 825         buf = pdu->buf;
 826
 827         len = sb.st_size;
 828         p = buf;
 829         if (read_ini_data(fd, p, len)) {
 830                 log_err("fio: failed reading job file %s\n", filename);
 831                 close(fd);
 832                 free(pdu);
 833                 return 1;
 834         }
 835
 836         pdu->buf_len = __cpu_to_le32(sb.st_size);
 837         pdu->client_type = cpu_to_le32(client->type);
 838
 839         client->sent_job = true;
 840         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 841         free(pdu);
 842         close(fd);
 843         return ret;
 844 }
 845
 846 int fio_client_send_ini(struct fio_client *client, const char *filename,
 847                         bool remote)
 848 {
 849         int ret;
 850
 851         if (!remote)
 852                 ret = __fio_client_send_local_ini(client, filename);
 853         else
 854                 ret = __fio_client_send_remote_ini(client, filename);
 855
 856         if (!ret)
 857                 client->sent_job = true;
 858
 859         return ret;
 860 }
 861
 862 static int fio_client_send_cf(struct fio_client *client,
 863                               struct client_file *cf)
 864 {
 865         return fio_client_send_ini(client, cf->file, cf->remote);
 866 }
 867
 868 int fio_clients_send_ini(const char *filename)
 869 {
 870         struct fio_client *client;
 871         struct flist_head *entry, *tmp;
 872
 873         flist_for_each_safe(entry, tmp, &client_list) {
 874                 bool failed = false;
 875
 876                 client = flist_entry(entry, struct fio_client, list);
 877
 878                 if (client->nr_files) {
 879                         int i;
 880
 881                         for (i = 0; i < client->nr_files; i++) {
 882                                 struct client_file *cf;
 883
 884                                 cf = &client->files[i];
 885
 886                                 if (fio_client_send_cf(client, cf)) {
 887                                         failed = true;
 888                                         remove_client(client);
 889                                         break;
 890                                 }
 891                         }
 892                 }
 893                 if (client->sent_job || failed)
 894                         continue;
 895                 if (!filename || fio_client_send_ini(client, filename, 0))
 896                         remove_client(client);
 897         }
 898
 899         return !nr_clients;
 900 }
 901
 902 int fio_client_update_options(struct fio_client *client,
 903                               struct thread_options *o, uint64_t *tag)
 904 {
 905         struct cmd_add_job_pdu pdu;
 906
 907         pdu.thread_number = cpu_to_le32(client->thread_number);
 908         pdu.groupid = cpu_to_le32(client->groupid);
 909         convert_thread_options_to_net(&pdu.top, o);
 910
 911         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 912 }
 913
 914 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 915 {
 916         dst->max_val    = le64_to_cpu(src->max_val);
 917         dst->min_val    = le64_to_cpu(src->min_val);
 918         dst->samples    = le64_to_cpu(src->samples);
 919
 920         /*
 921          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 922          */
 923         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 924         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 925 }
 926
 927 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 928 {
 929         int i, j;
 930
 931         dst->error              = le32_to_cpu(src->error);
 932         dst->thread_number      = le32_to_cpu(src->thread_number);
 933         dst->groupid            = le32_to_cpu(src->groupid);
 934         dst->pid                = le32_to_cpu(src->pid);
 935         dst->members            = le32_to_cpu(src->members);
 936         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 937
 938         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 939                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 940                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 941                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 942                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 943                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 944         }
 945
 946         dst->usr_time           = le64_to_cpu(src->usr_time);
 947         dst->sys_time           = le64_to_cpu(src->sys_time);
 948         dst->ctx                = le64_to_cpu(src->ctx);
 949         dst->minf               = le64_to_cpu(src->minf);
 950         dst->majf               = le64_to_cpu(src->majf);
 951         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 952         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 953         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 954
 955         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 956                 fio_fp64_t *fps = &src->percentile_list[i];
 957                 fio_fp64_t *fpd = &dst->percentile_list[i];
 958
 959                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 960         }
 961
 962         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 963                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 964                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 965                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 966         }
 967
 968         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 969                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
 970         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 971                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
 972         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 973                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
 974
 975         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 976                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 977                         dst->io_u_plat[i][j] = le64_to_cpu(src->io_u_plat[i][j]);
 978
 979         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 980                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 981                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 982                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
 983         }
 984
 985         dst->total_submit       = le64_to_cpu(src->total_submit);
 986         dst->total_complete     = le64_to_cpu(src->total_complete);
 987
 988         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 989                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 990                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 991         }
 992
 993         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 994         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 995         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 996         dst->first_error        = le32_to_cpu(src->first_error);
 997         dst->kb_base            = le32_to_cpu(src->kb_base);
 998         dst->unit_base          = le32_to_cpu(src->unit_base);
 999
1000         dst->sig_figs           = le32_to_cpu(src->sig_figs);
1001
1002         dst->latency_depth      = le32_to_cpu(src->latency_depth);
1003         dst->latency_target     = le64_to_cpu(src->latency_target);
1004         dst->latency_window     = le64_to_cpu(src->latency_window);
1005         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
1006
1007         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
1008         for (i = 0; i < dst->nr_block_infos; i++)
1009                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
1010
1011         dst->ss_dur             = le64_to_cpu(src->ss_dur);
1012         dst->ss_state           = le32_to_cpu(src->ss_state);
1013         dst->ss_head            = le32_to_cpu(src->ss_head);
1014         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
1015         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
1016         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
1017         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
1018
1019         if (dst->ss_state & FIO_SS_DATA) {
1020                 for (i = 0; i < dst->ss_dur; i++ ) {
1021                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
1022                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
1023                 }
1024         }
1025 }
1026
1027 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
1028 {
1029         int i;
1030
1031         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1032                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
1033                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
1034                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
1035                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
1036                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
1037                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
1038         }
1039
1040         dst->kb_base    = le32_to_cpu(src->kb_base);
1041         dst->unit_base  = le32_to_cpu(src->unit_base);
1042         dst->sig_figs   = le32_to_cpu(src->sig_figs);
1043         dst->groupid    = le32_to_cpu(src->groupid);
1044         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
1045 }
1046
1047 static void json_object_add_client_info(struct json_object *obj,
1048                                         struct fio_client *client)
1049 {
1050         const char *hostname = client->hostname ? client->hostname : "";
1051
1052         json_object_add_value_string(obj, "hostname", hostname);
1053         json_object_add_value_int(obj, "port", client->port);
1054 }
1055
1056 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1057 {
1058         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1059         struct flist_head *opt_list = NULL;
1060         struct json_object *tsobj;
1061
1062         if (output_format & FIO_OUTPUT_TERSE)
1063                 return;
1064
1065         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1066                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1067
1068         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, NULL);
1069         client->did_stat = true;
1070         if (tsobj) {
1071                 json_object_add_client_info(tsobj, client);
1072                 json_array_add_value_object(clients_array, tsobj);
1073         }
1074
1075         if (sum_stat_clients <= 1)
1076                 return;
1077
1078         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr == 1);
1079         sum_group_stats(&client_gs, &p->rs);
1080
1081         client_ts.members++;
1082         client_ts.thread_number = p->ts.thread_number;
1083         client_ts.groupid = p->ts.groupid;
1084         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1085         client_ts.sig_figs = p->ts.sig_figs;
1086
1087         if (++sum_stat_nr == sum_stat_clients) {
1088                 strcpy(client_ts.name, "All clients");
1089                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, NULL);
1090                 if (tsobj) {
1091                         json_object_add_client_info(tsobj, client);
1092                         json_array_add_value_object(clients_array, tsobj);
1093                 }
1094         }
1095 }
1096
1097 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1098 {
1099         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1100
1101         if (output_format & FIO_OUTPUT_TERSE)
1102                 return;
1103
1104         if (output_format & FIO_OUTPUT_NORMAL)
1105                 show_group_stats(gs, NULL);
1106 }
1107
1108 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1109 {
1110         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1111         struct print_option *p;
1112
1113         if (!job_opt_object)
1114                 return;
1115
1116         pdu->global = le16_to_cpu(pdu->global);
1117         pdu->truncated = le16_to_cpu(pdu->truncated);
1118         pdu->groupid = le32_to_cpu(pdu->groupid);
1119
1120         p = malloc(sizeof(*p));
1121         p->name = strdup((char *) pdu->name);
1122         if (pdu->value[0] != '\0')
1123                 p->value = strdup((char *) pdu->value);
1124         else
1125                 p->value = NULL;
1126
1127         if (pdu->global) {
1128                 const char *pos = "";
1129
1130                 if (p->value)
1131                         pos = p->value;
1132
1133                 json_object_add_value_string(job_opt_object, p->name, pos);
1134         } else if (client->opt_lists) {
1135                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1136
1137                 flist_add_tail(&p->list, opt_list);
1138         }
1139 }
1140
1141 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1142 {
1143         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1144         const char *buf = (const char *) pdu->buf;
1145         const char *name;
1146         int fio_unused ret;
1147
1148         name = client->name ? client->name : client->hostname;
1149
1150         if (!client->skip_newline && !(output_format & FIO_OUTPUT_TERSE))
1151                 fprintf(f_out, "<%s> ", name);
1152         ret = fwrite(buf, pdu->buf_len, 1, f_out);
1153         fflush(f_out);
1154         client->skip_newline = strchr(buf, '\n') == NULL;
1155 }
1156
1157 static void convert_agg(struct disk_util_agg *agg)
1158 {
1159         int i;
1160
1161         for (i = 0; i < 2; i++) {
1162                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1163                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1164                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1165                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1166         }
1167
1168         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1169         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1170         agg->slavecount         = le32_to_cpu(agg->slavecount);
1171         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1172 }
1173
1174 static void convert_dus(struct disk_util_stat *dus)
1175 {
1176         int i;
1177
1178         for (i = 0; i < 2; i++) {
1179                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1180                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1181                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1182                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1183         }
1184
1185         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1186         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1187         dus->s.msec             = le64_to_cpu(dus->s.msec);
1188 }
1189
1190 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1191 {
1192         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1193
1194         if (output_format & FIO_OUTPUT_TERSE)
1195                 return;
1196
1197         if (!client->disk_stats_shown) {
1198                 client->disk_stats_shown = true;
1199                 if (!(output_format & FIO_OUTPUT_JSON))
1200                         log_info("\nDisk stats (read/write):\n");
1201         }
1202
1203         if (output_format & FIO_OUTPUT_JSON) {
1204                 struct json_object *duobj;
1205                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1206                 duobj = json_array_last_value_object(du_array);
1207                 json_object_add_client_info(duobj, client);
1208         }
1209         if (output_format & FIO_OUTPUT_NORMAL)
1210                 print_disk_util(&du->dus, &du->agg, 0, NULL);
1211 }
1212
1213 static void convert_jobs_eta(struct jobs_eta *je)
1214 {
1215         int i;
1216
1217         je->nr_running          = le32_to_cpu(je->nr_running);
1218         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1219         je->nr_pending          = le32_to_cpu(je->nr_pending);
1220         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1221         je->files_open          = le32_to_cpu(je->files_open);
1222
1223         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1224                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1225                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1226                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1227                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1228                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1229                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1230         }
1231
1232         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1233         je->eta_sec             = le64_to_cpu(je->eta_sec);
1234         je->nr_threads          = le32_to_cpu(je->nr_threads);
1235         je->is_pow2             = le32_to_cpu(je->is_pow2);
1236         je->unit_base           = le32_to_cpu(je->unit_base);
1237         je->sig_figs            = le32_to_cpu(je->sig_figs);
1238 }
1239
1240 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1241 {
1242         int i;
1243
1244         dst->nr_running         += je->nr_running;
1245         dst->nr_ramp            += je->nr_ramp;
1246         dst->nr_pending         += je->nr_pending;
1247         dst->nr_setting_up      += je->nr_setting_up;
1248         dst->files_open         += je->files_open;
1249
1250         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1251                 dst->m_rate[i]  += je->m_rate[i];
1252                 dst->t_rate[i]  += je->t_rate[i];
1253                 dst->m_iops[i]  += je->m_iops[i];
1254                 dst->t_iops[i]  += je->t_iops[i];
1255                 dst->rate[i]    += je->rate[i];
1256                 dst->iops[i]    += je->iops[i];
1257         }
1258
1259         dst->elapsed_sec        += je->elapsed_sec;
1260
1261         if (je->eta_sec > dst->eta_sec)
1262                 dst->eta_sec = je->eta_sec;
1263
1264         dst->nr_threads         += je->nr_threads;
1265
1266         /*
1267          * This wont be correct for multiple strings, but at least it
1268          * works for the basic cases.
1269          */
1270         strcpy((char *) dst->run_str, (char *) je->run_str);
1271 }
1272
1273 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1274 {
1275         struct fio_net_cmd_reply *reply = NULL;
1276         struct flist_head *entry;
1277
1278         flist_for_each(entry, &client->cmd_list) {
1279                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1280
1281                 if (cmd->tag == (uintptr_t) reply)
1282                         break;
1283
1284                 reply = NULL;
1285         }
1286
1287         if (!reply) {
1288                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1289                 return false;
1290         }
1291
1292         flist_del(&reply->list);
1293         cmd->tag = reply->saved_tag;
1294         free(reply);
1295         return true;
1296 }
1297
1298 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1299 {
1300         do {
1301                 struct fio_net_cmd_reply *reply = NULL;
1302                 struct flist_head *entry;
1303
1304                 flist_for_each(entry, &client->cmd_list) {
1305                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1306
1307                         if (tag == (uintptr_t) reply)
1308                                 break;
1309
1310                         reply = NULL;
1311                 }
1312
1313                 if (!reply)
1314                         break;
1315
1316                 usleep(1000);
1317         } while (1);
1318
1319         return 0;
1320 }
1321
1322 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1323 {
1324         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1325         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1326
1327         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1328
1329         assert(client->eta_in_flight == eta);
1330
1331         client->eta_in_flight = NULL;
1332         flist_del_init(&client->eta_list);
1333         client->eta_timeouts = 0;
1334
1335         if (client->ops->jobs_eta)
1336                 client->ops->jobs_eta(client, je);
1337
1338         fio_client_sum_jobs_eta(&eta->eta, je);
1339         fio_client_dec_jobs_eta(eta, client->ops->eta);
1340 }
1341
1342 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1343                                       uint64_t sample_size)
1344 {
1345         struct io_sample *s;
1346         int log_offset;
1347         uint64_t i, j, nr_samples;
1348         struct io_u_plat_entry *entry;
1349         uint64_t *io_u_plat;
1350
1351         int stride = 1 << hist_coarseness;
1352
1353         if (!sample_size)
1354                 return;
1355
1356         s = __get_sample(samples, 0, 0);
1357         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1358
1359         nr_samples = sample_size / __log_entry_sz(log_offset);
1360
1361         for (i = 0; i < nr_samples; i++) {
1362
1363                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1364                         i * sizeof(struct io_u_plat_entry));
1365
1366                 entry = s->data.plat_entry;
1367                 io_u_plat = entry->io_u_plat;
1368
1369                 fprintf(f, "%lu, %u, %llu, ", (unsigned long) s->time,
1370                                                 io_sample_ddir(s), (unsigned long long) s->bs);
1371                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1372                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1373                 }
1374                 fprintf(f, "%llu\n", (unsigned long long)
1375                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1376
1377         }
1378 }
1379
1380 static int fio_client_handle_iolog(struct fio_client *client,
1381                                    struct fio_net_cmd *cmd)
1382 {
1383         struct cmd_iolog_pdu *pdu = NULL;
1384         bool store_direct;
1385         char *log_pathname = NULL;
1386         int ret = 0;
1387
1388         pdu = convert_iolog(cmd, &store_direct);
1389         if (!pdu) {
1390                 log_err("fio: failed converting IO log\n");
1391                 ret = 1;
1392                 goto out;
1393         }
1394
1395         /* allocate buffer big enough for next sprintf() call */
1396         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1397                         strlen(client->hostname));
1398         if (!log_pathname) {
1399                 log_err("fio: memory allocation of unique pathname failed\n");
1400                 ret = -1;
1401                 goto out;
1402         }
1403         /* generate a unique pathname for the log file using hostname */
1404         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1405
1406         if (store_direct) {
1407                 ssize_t wrote;
1408                 size_t sz;
1409                 int fd;
1410
1411                 fd = open((const char *) log_pathname,
1412                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1413                 if (fd < 0) {
1414                         log_err("fio: open log %s: %s\n",
1415                                 log_pathname, strerror(errno));
1416                         ret = 1;
1417                         goto out;
1418                 }
1419
1420                 sz = cmd->pdu_len - sizeof(*pdu);
1421                 wrote = write(fd, pdu->samples, sz);
1422                 close(fd);
1423
1424                 if (wrote != sz) {
1425                         log_err("fio: short write on compressed log\n");
1426                         ret = 1;
1427                         goto out;
1428                 }
1429
1430                 ret = 0;
1431         } else {
1432                 FILE *f;
1433                 f = fopen((const char *) log_pathname, "w");
1434                 if (!f) {
1435                         log_err("fio: fopen log %s : %s\n",
1436                                 log_pathname, strerror(errno));
1437                         ret = 1;
1438                         goto out;
1439                 }
1440
1441                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1442                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1443                                            pdu->nr_samples * sizeof(struct io_sample));
1444                 } else {
1445                         flush_samples(f, pdu->samples,
1446                                         pdu->nr_samples * sizeof(struct io_sample));
1447                 }
1448                 fclose(f);
1449                 ret = 0;
1450         }
1451
1452 out:
1453         if (pdu && pdu != (void *) cmd->payload)
1454                 free(pdu);
1455
1456         if (log_pathname)
1457                 free(log_pathname);
1458
1459         return ret;
1460 }
1461
1462 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1463 {
1464         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1465         const char *os, *arch;
1466         char bit[16];
1467
1468         if (output_format & FIO_OUTPUT_TERSE)
1469                 return;
1470
1471         os = fio_get_os_string(probe->os);
1472         if (!os)
1473                 os = "unknown";
1474
1475         arch = fio_get_arch_string(probe->arch);
1476         if (!arch)
1477                 os = "unknown";
1478
1479         sprintf(bit, "%d-bit", probe->bpp * 8);
1480         probe->flags = le64_to_cpu(probe->flags);
1481
1482         if (!(output_format & FIO_OUTPUT_JSON))
1483                 log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1484                         probe->hostname, probe->bigendian, bit, os, arch,
1485                         probe->fio_version, (unsigned long) probe->flags);
1486
1487         if (!client->name)
1488                 client->name = strdup((char *) probe->hostname);
1489 }
1490
1491 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1492 {
1493         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1494
1495         client->state = Client_started;
1496         client->jobs = le32_to_cpu(pdu->jobs);
1497         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1498
1499         if (client->jobs) {
1500                 int i;
1501
1502                 if (client->opt_lists)
1503                         free(client->opt_lists);
1504
1505                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1506                 for (i = 0; i < client->jobs; i++)
1507                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1508         }
1509
1510         sum_stat_clients += client->nr_stat;
1511 }
1512
1513 static void handle_stop(struct fio_client *client)
1514 {
1515         if (client->error)
1516                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1517 }
1518
1519 static void convert_stop(struct fio_net_cmd *cmd)
1520 {
1521         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1522
1523         pdu->error = le32_to_cpu(pdu->error);
1524 }
1525
1526 static void convert_text(struct fio_net_cmd *cmd)
1527 {
1528         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1529
1530         pdu->level      = le32_to_cpu(pdu->level);
1531         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1532         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1533         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1534 }
1535
1536 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1537                                               struct cmd_iolog_pdu *pdu)
1538 {
1539 #ifdef CONFIG_ZLIB
1540         struct cmd_iolog_pdu *ret;
1541         z_stream stream;
1542         uint32_t nr_samples;
1543         size_t total;
1544         char *p;
1545
1546         stream.zalloc = Z_NULL;
1547         stream.zfree = Z_NULL;
1548         stream.opaque = Z_NULL;
1549         stream.avail_in = 0;
1550         stream.next_in = Z_NULL;
1551
1552         if (inflateInit(&stream) != Z_OK)
1553                 return NULL;
1554
1555         /*
1556          * Get header first, it's not compressed
1557          */
1558         nr_samples = le64_to_cpu(pdu->nr_samples);
1559
1560         if (pdu->log_type == IO_LOG_TYPE_HIST)
1561                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1562                                         sizeof(struct io_u_plat_entry));
1563         else
1564                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1565         ret = malloc(total + sizeof(*pdu));
1566         ret->nr_samples = nr_samples;
1567
1568         memcpy(ret, pdu, sizeof(*pdu));
1569
1570         p = (char *) ret + sizeof(*pdu);
1571
1572         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1573         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1574         while (stream.avail_in) {
1575                 unsigned int this_chunk = 65536;
1576                 unsigned int this_len;
1577                 int err;
1578
1579                 if (this_chunk > total)
1580                         this_chunk = total;
1581
1582                 stream.avail_out = this_chunk;
1583                 stream.next_out = (void *)p;
1584                 err = inflate(&stream, Z_NO_FLUSH);
1585                 /* may be Z_OK, or Z_STREAM_END */
1586                 if (err < 0) {
1587                         log_err("fio: inflate error %d\n", err);
1588                         free(ret);
1589                         ret = NULL;
1590                         goto err;
1591                 }
1592
1593                 this_len = this_chunk - stream.avail_out;
1594                 p += this_len;
1595                 total -= this_len;
1596         }
1597
1598 err:
1599         inflateEnd(&stream);
1600         return ret;
1601 #else
1602         return NULL;
1603 #endif
1604 }
1605
1606 /*
1607  * This has been compressed on the server side, since it can be big.
1608  * Uncompress here.
1609  */
1610 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1611                                            bool *store_direct)
1612 {
1613         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1614         struct cmd_iolog_pdu *ret;
1615         uint64_t i;
1616         int compressed;
1617         void *samples;
1618
1619         *store_direct = false;
1620
1621         /*
1622          * Convert if compressed and we support it. If it's not
1623          * compressed, we need not do anything.
1624          */
1625         compressed = le32_to_cpu(pdu->compressed);
1626         if (compressed == XMIT_COMPRESSED) {
1627 #ifndef CONFIG_ZLIB
1628                 log_err("fio: server sent compressed data by mistake\n");
1629                 return NULL;
1630 #endif
1631                 ret = convert_iolog_gz(cmd, pdu);
1632                 if (!ret) {
1633                         log_err("fio: failed decompressing log\n");
1634                         return NULL;
1635                 }
1636         } else if (compressed == STORE_COMPRESSED) {
1637                 *store_direct = true;
1638                 ret = pdu;
1639         } else
1640                 ret = pdu;
1641
1642         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1643         ret->thread_number      = le32_to_cpu(ret->thread_number);
1644         ret->log_type           = le32_to_cpu(ret->log_type);
1645         ret->compressed         = le32_to_cpu(ret->compressed);
1646         ret->log_offset         = le32_to_cpu(ret->log_offset);
1647         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1648
1649         if (*store_direct)
1650                 return ret;
1651
1652         samples = &ret->samples[0];
1653         for (i = 0; i < ret->nr_samples; i++) {
1654                 struct io_sample *s;
1655
1656                 s = __get_sample(samples, ret->log_offset, i);
1657                 if (ret->log_type == IO_LOG_TYPE_HIST)
1658                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1659
1660                 s->time         = le64_to_cpu(s->time);
1661                 s->data.val     = le64_to_cpu(s->data.val);
1662                 s->__ddir       = le32_to_cpu(s->__ddir);
1663                 s->bs           = le64_to_cpu(s->bs);
1664
1665                 if (ret->log_offset) {
1666                         struct io_sample_offset *so = (void *) s;
1667
1668                         so->offset = le64_to_cpu(so->offset);
1669                 }
1670
1671                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1672                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1673                         s->data.plat_entry->list.next = NULL;
1674                         s->data.plat_entry->list.prev = NULL;
1675                 }
1676         }
1677
1678         return ret;
1679 }
1680
1681 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1682                            size_t size, uint64_t tag)
1683 {
1684         rep->error = cpu_to_le32(rep->error);
1685         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1686 }
1687
1688 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1689                          uint64_t tag)
1690 {
1691         struct cmd_sendfile_reply *rep;
1692         struct stat sb;
1693         size_t size;
1694         int fd;
1695
1696         size = sizeof(*rep);
1697         rep = malloc(size);
1698
1699         if (stat((char *)pdu->path, &sb) < 0) {
1700 fail:
1701                 rep->error = errno;
1702                 sendfile_reply(client->fd, rep, size, tag);
1703                 free(rep);
1704                 return 1;
1705         }
1706
1707         size += sb.st_size;
1708         rep = realloc(rep, size);
1709         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1710
1711         fd = open((char *)pdu->path, O_RDONLY);
1712         if (fd == -1 )
1713                 goto fail;
1714
1715         rep->error = read_data(fd, &rep->data, sb.st_size);
1716         sendfile_reply(client->fd, rep, size, tag);
1717         free(rep);
1718         close(fd);
1719         return 0;
1720 }
1721
1722 int fio_handle_client(struct fio_client *client)
1723 {
1724         struct client_ops *ops = client->ops;
1725         struct fio_net_cmd *cmd;
1726         int size;
1727
1728         dprint(FD_NET, "client: handle %s\n", client->hostname);
1729
1730         cmd = fio_net_recv_cmd(client->fd, true);
1731         if (!cmd)
1732                 return 0;
1733
1734         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1735                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1736
1737         client->last_cmd = cmd->opcode;
1738
1739         switch (cmd->opcode) {
1740         case FIO_NET_CMD_QUIT:
1741                 if (ops->quit)
1742                         ops->quit(client, cmd);
1743                 remove_client(client);
1744                 break;
1745         case FIO_NET_CMD_TEXT:
1746                 convert_text(cmd);
1747                 ops->text(client, cmd);
1748                 break;
1749         case FIO_NET_CMD_DU: {
1750                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1751
1752                 convert_dus(&du->dus);
1753                 convert_agg(&du->agg);
1754
1755                 ops->disk_util(client, cmd);
1756                 break;
1757                 }
1758         case FIO_NET_CMD_TS: {
1759                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1760
1761                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1762                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1763                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1764
1765                         size = le64_to_cpu(p->ts.ss_dur);
1766                         p->ts.ss_iops_data = (uint64_t *) ((struct cmd_ts_pdu *)cmd->payload + 1);
1767                         p->ts.ss_bw_data = p->ts.ss_iops_data + size;
1768                 }
1769
1770                 convert_ts(&p->ts, &p->ts);
1771                 convert_gs(&p->rs, &p->rs);
1772
1773                 ops->thread_status(client, cmd);
1774                 break;
1775                 }
1776         case FIO_NET_CMD_GS: {
1777                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1778
1779                 convert_gs(gs, gs);
1780
1781                 ops->group_stats(client, cmd);
1782                 break;
1783                 }
1784         case FIO_NET_CMD_ETA: {
1785                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1786
1787                 if (!remove_reply_cmd(client, cmd))
1788                         break;
1789                 convert_jobs_eta(je);
1790                 handle_eta(client, cmd);
1791                 break;
1792                 }
1793         case FIO_NET_CMD_PROBE:
1794                 remove_reply_cmd(client, cmd);
1795                 ops->probe(client, cmd);
1796                 break;
1797         case FIO_NET_CMD_SERVER_START:
1798                 client->state = Client_running;
1799                 if (ops->job_start)
1800                         ops->job_start(client, cmd);
1801                 break;
1802         case FIO_NET_CMD_START: {
1803                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1804
1805                 pdu->jobs = le32_to_cpu(pdu->jobs);
1806                 ops->start(client, cmd);
1807                 break;
1808                 }
1809         case FIO_NET_CMD_STOP: {
1810                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1811
1812                 convert_stop(cmd);
1813                 client->state = Client_stopped;
1814                 client->error = le32_to_cpu(pdu->error);
1815                 client->signal = le32_to_cpu(pdu->signal);
1816                 ops->stop(client);
1817                 break;
1818                 }
1819         case FIO_NET_CMD_ADD_JOB: {
1820                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1821
1822                 client->thread_number = le32_to_cpu(pdu->thread_number);
1823                 client->groupid = le32_to_cpu(pdu->groupid);
1824
1825                 if (ops->add_job)
1826                         ops->add_job(client, cmd);
1827                 break;
1828                 }
1829         case FIO_NET_CMD_IOLOG:
1830                 fio_client_handle_iolog(client, cmd);
1831                 break;
1832         case FIO_NET_CMD_UPDATE_JOB:
1833                 ops->update_job(client, cmd);
1834                 remove_reply_cmd(client, cmd);
1835                 break;
1836         case FIO_NET_CMD_VTRIGGER: {
1837                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1838                 char buf[128];
1839                 int off = 0;
1840
1841                 if (aux_path) {
1842                         strcpy(buf, aux_path);
1843                         off = strlen(buf);
1844                 }
1845
1846                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1847                 exec_trigger(trigger_cmd);
1848                 break;
1849                 }
1850         case FIO_NET_CMD_SENDFILE: {
1851                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1852                 fio_send_file(client, pdu, cmd->tag);
1853                 break;
1854                 }
1855         case FIO_NET_CMD_JOB_OPT: {
1856                 handle_job_opt(client, cmd);
1857                 break;
1858         }
1859         default:
1860                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1861                 break;
1862         }
1863
1864         free(cmd);
1865         return 1;
1866 }
1867
1868 int fio_clients_send_trigger(const char *cmd)
1869 {
1870         struct flist_head *entry;
1871         struct fio_client *client;
1872         size_t slen;
1873
1874         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1875
1876         if (!cmd)
1877                 slen = 0;
1878         else
1879                 slen = strlen(cmd);
1880
1881         flist_for_each(entry, &client_list) {
1882                 struct cmd_vtrigger_pdu *pdu;
1883
1884                 client = flist_entry(entry, struct fio_client, list);
1885
1886                 pdu = malloc(sizeof(*pdu) + slen);
1887                 pdu->len = cpu_to_le16((uint16_t) slen);
1888                 if (slen)
1889                         memcpy(pdu->cmd, cmd, slen);
1890                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1891                                         sizeof(*pdu) + slen, NULL, NULL);
1892                 free(pdu);
1893         }
1894
1895         return 0;
1896 }
1897
1898 static void request_client_etas(struct client_ops *ops)
1899 {
1900         struct fio_client *client;
1901         struct flist_head *entry;
1902         struct client_eta *eta;
1903         int skipped = 0;
1904
1905         if (eta_print == FIO_ETA_NEVER)
1906                 return;
1907
1908         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1909
1910         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1911         eta->pending = nr_clients;
1912
1913         flist_for_each(entry, &client_list) {
1914                 client = flist_entry(entry, struct fio_client, list);
1915
1916                 if (!flist_empty(&client->eta_list)) {
1917                         skipped++;
1918                         continue;
1919                 }
1920                 if (client->state != Client_running)
1921                         continue;
1922
1923                 assert(!client->eta_in_flight);
1924                 flist_add_tail(&client->eta_list, &eta_list);
1925                 client->eta_in_flight = eta;
1926                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1927                                         (uintptr_t) eta, &client->cmd_list);
1928         }
1929
1930         while (skipped--) {
1931                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1932                         break;
1933         }
1934
1935         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1936 }
1937
1938 /*
1939  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
1940  */
1941 static int handle_cmd_timeout(struct fio_client *client,
1942                               struct fio_net_cmd_reply *reply)
1943 {
1944         uint16_t reply_opcode = reply->opcode;
1945
1946         flist_del(&reply->list);
1947         free(reply);
1948
1949         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
1950                 return 1;
1951
1952         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
1953
1954         flist_del_init(&client->eta_list);
1955         if (client->eta_in_flight) {
1956                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
1957                 client->eta_in_flight = NULL;
1958         }
1959
1960         /*
1961          * If we fail 5 in a row, give up...
1962          */
1963         if (client->eta_timeouts++ > 5)
1964                 return 1;
1965
1966         return 0;
1967 }
1968
1969 static int client_check_cmd_timeout(struct fio_client *client,
1970                                     struct timespec *now)
1971 {
1972         struct fio_net_cmd_reply *reply;
1973         struct flist_head *entry, *tmp;
1974         int ret = 0;
1975
1976         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1977                 unsigned int op;
1978
1979                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1980
1981                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
1982                         continue;
1983
1984                 op = reply->opcode;
1985                 if (!handle_cmd_timeout(client, reply))
1986                         continue;
1987
1988                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1989                                                 fio_server_op(op));
1990                 ret = 1;
1991         }
1992
1993         return flist_empty(&client->cmd_list) && ret;
1994 }
1995
1996 static int fio_check_clients_timed_out(void)
1997 {
1998         struct fio_client *client;
1999         struct flist_head *entry, *tmp;
2000         struct timespec ts;
2001         int ret = 0;
2002
2003         fio_gettime(&ts, NULL);
2004
2005         flist_for_each_safe(entry, tmp, &client_list) {
2006                 client = flist_entry(entry, struct fio_client, list);
2007
2008                 if (flist_empty(&client->cmd_list))
2009                         continue;
2010
2011                 if (!client_check_cmd_timeout(client, &ts))
2012                         continue;
2013
2014                 if (client->ops->timed_out)
2015                         client->ops->timed_out(client);
2016                 else
2017                         log_err("fio: client %s timed out\n", client->hostname);
2018
2019                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
2020                         client->error = ETIMEDOUT;
2021                 else
2022                         log_info("fio: ignoring timeout due to vtrigger\n");
2023                 remove_client(client);
2024                 ret = 1;
2025         }
2026
2027         return ret;
2028 }
2029
2030 int fio_handle_clients(struct client_ops *ops)
2031 {
2032         struct pollfd *pfds;
2033         int i, ret = 0, retval = 0;
2034
2035         fio_gettime(&eta_ts, NULL);
2036
2037         pfds = malloc(nr_clients * sizeof(struct pollfd));
2038
2039         init_thread_stat(&client_ts);
2040         init_group_run_stat(&client_gs);
2041
2042         while (!exit_backend && nr_clients) {
2043                 struct flist_head *entry, *tmp;
2044                 struct fio_client *client;
2045
2046                 i = 0;
2047                 flist_for_each_safe(entry, tmp, &client_list) {
2048                         client = flist_entry(entry, struct fio_client, list);
2049
2050                         if (!client->sent_job && !client->ops->stay_connected &&
2051                             flist_empty(&client->cmd_list)) {
2052                                 remove_client(client);
2053                                 continue;
2054                         }
2055
2056                         pfds[i].fd = client->fd;
2057                         pfds[i].events = POLLIN;
2058                         i++;
2059                 }
2060
2061                 if (!nr_clients)
2062                         break;
2063
2064                 assert(i == nr_clients);
2065
2066                 do {
2067                         struct timespec ts;
2068                         int timeout;
2069
2070                         fio_gettime(&ts, NULL);
2071                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2072                                 request_client_etas(ops);
2073                                 memcpy(&eta_ts, &ts, sizeof(ts));
2074
2075                                 if (fio_check_clients_timed_out())
2076                                         break;
2077                         }
2078
2079                         check_trigger_file();
2080
2081                         timeout = min(100u, ops->eta_msec);
2082
2083                         ret = poll(pfds, nr_clients, timeout);
2084                         if (ret < 0) {
2085                                 if (errno == EINTR)
2086                                         continue;
2087                                 log_err("fio: poll clients: %s\n", strerror(errno));
2088                                 break;
2089                         } else if (!ret)
2090                                 continue;
2091                 } while (ret <= 0);
2092
2093                 for (i = 0; i < nr_clients; i++) {
2094                         if (!(pfds[i].revents & POLLIN))
2095                                 continue;
2096
2097                         client = find_client_by_fd(pfds[i].fd);
2098                         if (!client) {
2099                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2100                                 continue;
2101                         }
2102                         if (!fio_handle_client(client)) {
2103                                 log_info("client: host=%s disconnected\n",
2104                                                 client->hostname);
2105                                 remove_client(client);
2106                                 retval = 1;
2107                         } else if (client->error)
2108                                 retval = 1;
2109                         fio_put_client(client);
2110                 }
2111         }
2112
2113         fio_client_json_fini();
2114
2115         free(pfds);
2116         return retval || error_clients;
2117 }
2118
2119 static void client_display_thread_status(struct jobs_eta *je)
2120 {
2121         if (!(output_format & FIO_OUTPUT_JSON))
2122                 display_thread_status(je);
2123 }