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 buf_output allclients;
  63 static struct json_object *root = NULL;
  64 static struct json_object *job_opt_object = NULL;
  65 static struct json_array *clients_array = NULL;
  66 static struct json_array *du_array = NULL;
  67
  68 static int error_clients;
  69
  70 #define FIO_CLIENT_HASH_BITS    7
  71 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  72 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  73 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  74
  75 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *, bool *);
  76
  77 static void fio_client_add_hash(struct fio_client *client)
  78 {
  79         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  80
  81         bucket &= FIO_CLIENT_HASH_MASK;
  82         flist_add(&client->hash_list, &client_hash[bucket]);
  83 }
  84
  85 static void fio_client_remove_hash(struct fio_client *client)
  86 {
  87         if (!flist_empty(&client->hash_list))
  88                 flist_del_init(&client->hash_list);
  89 }
  90
  91 static void fio_init fio_client_hash_init(void)
  92 {
  93         int i;
  94
  95         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  96                 INIT_FLIST_HEAD(&client_hash[i]);
  97 }
  98
  99 static int read_data(int fd, void *data, size_t size)
 100 {
 101         ssize_t ret;
 102
 103         while (size) {
 104                 ret = read(fd, data, size);
 105                 if (ret < 0) {
 106                         if (errno == EAGAIN || errno == EINTR)
 107                                 continue;
 108                         break;
 109                 } else if (!ret)
 110                         break;
 111                 else {
 112                         data += ret;
 113                         size -= ret;
 114                 }
 115         }
 116
 117         if (size)
 118                 return EAGAIN;
 119
 120         return 0;
 121 }
 122
 123 static int read_ini_data(int fd, void *data, size_t size)
 124 {
 125         char *p = data;
 126         int ret = 0;
 127         FILE *fp;
 128         int dupfd;
 129
 130         dupfd = dup(fd);
 131         if (dupfd < 0)
 132                 return errno;
 133
 134         fp = fdopen(dupfd, "r");
 135         if (!fp) {
 136                 ret = errno;
 137                 close(dupfd);
 138                 goto out;
 139         }
 140
 141         while (1) {
 142                 ssize_t len;
 143                 char buf[OPT_LEN_MAX+1], *sub;
 144
 145                 if (!fgets(buf, sizeof(buf), fp)) {
 146                         if (ferror(fp)) {
 147                                 if (errno == EAGAIN || errno == EINTR)
 148                                         continue;
 149                                 ret = errno;
 150                         }
 151                         break;
 152                 }
 153
 154                 sub = fio_option_dup_subs(buf);
 155                 len = strlen(sub);
 156                 if (len + 1 > size) {
 157                         log_err("fio: no space left to read data\n");
 158                         free(sub);
 159                         ret = ENOSPC;
 160                         break;
 161                 }
 162
 163                 memcpy(p, sub, len);
 164                 free(sub);
 165                 p += len;
 166                 *p = '\0';
 167                 size -= len;
 168         }
 169
 170         fclose(fp);
 171 out:
 172         return ret;
 173 }
 174
 175 static void fio_client_json_init(void)
 176 {
 177         char time_buf[32];
 178         time_t time_p;
 179
 180         if (!(output_format & FIO_OUTPUT_JSON))
 181                 return;
 182
 183         time(&time_p);
 184         os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
 185         time_buf[strlen(time_buf) - 1] = '\0';
 186
 187         root = json_create_object();
 188         json_object_add_value_string(root, "fio version", fio_version_string);
 189         json_object_add_value_int(root, "timestamp", time_p);
 190         json_object_add_value_string(root, "time", time_buf);
 191
 192         job_opt_object = json_create_object();
 193         json_object_add_value_object(root, "global options", job_opt_object);
 194         clients_array = json_create_array();
 195         json_object_add_value_array(root, "client_stats", clients_array);
 196         du_array = json_create_array();
 197         json_object_add_value_array(root, "disk_util", du_array);
 198 }
 199
 200 static void fio_client_json_fini(void)
 201 {
 202         struct buf_output out;
 203
 204         if (!root)
 205                 return;
 206
 207         buf_output_init(&out);
 208
 209         __log_buf(&out, "\n");
 210         json_print_object(root, &out);
 211         __log_buf(&out, "\n");
 212         log_info_buf(out.buf, out.buflen);
 213
 214         buf_output_free(&out);
 215
 216         json_free_object(root);
 217         root = NULL;
 218         job_opt_object = NULL;
 219         clients_array = NULL;
 220         du_array = NULL;
 221 }
 222
 223 static struct fio_client *find_client_by_fd(int fd)
 224 {
 225         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 226         struct fio_client *client;
 227         struct flist_head *entry;
 228
 229         flist_for_each(entry, &client_hash[bucket]) {
 230                 client = flist_entry(entry, struct fio_client, hash_list);
 231
 232                 if (client->fd == fd) {
 233                         client->refs++;
 234                         return client;
 235                 }
 236         }
 237
 238         return NULL;
 239 }
 240
 241 void fio_put_client(struct fio_client *client)
 242 {
 243         if (--client->refs)
 244                 return;
 245
 246         log_info_buf(client->buf.buf, client->buf.buflen);
 247         buf_output_free(&client->buf);
 248
 249         free(client->hostname);
 250         if (client->argv)
 251                 free(client->argv);
 252         if (client->name)
 253                 free(client->name);
 254         while (client->nr_files) {
 255                 struct client_file *cf = &client->files[--client->nr_files];
 256
 257                 free(cf->file);
 258         }
 259         if (client->files)
 260                 free(client->files);
 261         if (client->opt_lists)
 262                 free(client->opt_lists);
 263
 264         if (!client->did_stat)
 265                 sum_stat_clients--;
 266
 267         if (client->error)
 268                 error_clients++;
 269
 270         free(client);
 271 }
 272
 273 static int fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 274 {
 275         if (!--eta->pending) {
 276                 eta_fn(&eta->eta);
 277                 free(eta);
 278                 return 0;
 279         }
 280
 281         return 1;
 282 }
 283
 284 static void fio_drain_client_text(struct fio_client *client)
 285 {
 286         do {
 287                 struct fio_net_cmd *cmd;
 288
 289                 cmd = fio_net_recv_cmd(client->fd, false);
 290                 if (!cmd)
 291                         break;
 292
 293                 if (cmd->opcode == FIO_NET_CMD_TEXT) {
 294                         convert_text(cmd);
 295                         client->ops->text(client, cmd);
 296                 }
 297
 298                 free(cmd);
 299         } while (1);
 300 }
 301
 302 static void remove_client(struct fio_client *client)
 303 {
 304         assert(client->refs);
 305
 306         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 307
 308         fio_drain_client_text(client);
 309
 310         if (!flist_empty(&client->list))
 311                 flist_del_init(&client->list);
 312
 313         fio_client_remove_hash(client);
 314
 315         if (!flist_empty(&client->eta_list)) {
 316                 flist_del_init(&client->eta_list);
 317                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 318         }
 319
 320         close(client->fd);
 321         client->fd = -1;
 322
 323         if (client->ops->removed)
 324                 client->ops->removed(client);
 325
 326         nr_clients--;
 327         fio_put_client(client);
 328 }
 329
 330 struct fio_client *fio_get_client(struct fio_client *client)
 331 {
 332         client->refs++;
 333         return client;
 334 }
 335
 336 static void __fio_client_add_cmd_option(struct fio_client *client,
 337                                         const char *opt)
 338 {
 339         int index;
 340
 341         index = client->argc++;
 342         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 343         client->argv[index] = strdup(opt);
 344         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 345 }
 346
 347 void fio_client_add_cmd_option(void *cookie, const char *opt)
 348 {
 349         struct fio_client *client = cookie;
 350         struct flist_head *entry;
 351
 352         if (!client || !opt)
 353                 return;
 354
 355         __fio_client_add_cmd_option(client, opt);
 356
 357         /*
 358          * Duplicate arguments to shared client group
 359          */
 360         flist_for_each(entry, &arg_list) {
 361                 client = flist_entry(entry, struct fio_client, arg_list);
 362
 363                 __fio_client_add_cmd_option(client, opt);
 364         }
 365 }
 366
 367 static struct fio_client *get_new_client(void)
 368 {
 369         struct fio_client *client;
 370
 371         client = malloc(sizeof(*client));
 372         memset(client, 0, sizeof(*client));
 373
 374         INIT_FLIST_HEAD(&client->list);
 375         INIT_FLIST_HEAD(&client->hash_list);
 376         INIT_FLIST_HEAD(&client->arg_list);
 377         INIT_FLIST_HEAD(&client->eta_list);
 378         INIT_FLIST_HEAD(&client->cmd_list);
 379
 380         buf_output_init(&client->buf);
 381
 382         return client;
 383 }
 384
 385 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 386                                            const char *hostname, int type,
 387                                            int port)
 388 {
 389         struct fio_client *client;
 390
 391         client = get_new_client();
 392
 393         client->hostname = strdup(hostname);
 394
 395         if (type == Fio_client_socket)
 396                 client->is_sock = true;
 397         else {
 398                 int ipv6;
 399
 400                 ipv6 = type == Fio_client_ipv6;
 401                 if (fio_server_parse_host(hostname, ipv6,
 402                                                 &client->addr.sin_addr,
 403                                                 &client->addr6.sin6_addr))
 404                         goto err;
 405
 406                 client->port = port;
 407         }
 408
 409         client->fd = -1;
 410         client->ops = ops;
 411         client->refs = 1;
 412         client->type = ops->client_type;
 413
 414         __fio_client_add_cmd_option(client, "fio");
 415
 416         flist_add(&client->list, &client_list);
 417         nr_clients++;
 418         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 419         return client;
 420 err:
 421         free(client);
 422         return NULL;
 423 }
 424
 425 int fio_client_add_ini_file(void *cookie, const char *ini_file, bool remote)
 426 {
 427         struct fio_client *client = cookie;
 428         struct client_file *cf;
 429         size_t new_size;
 430         void *new_files;
 431
 432         if (!client)
 433                 return 1;
 434
 435         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 436
 437         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 438         new_files = realloc(client->files, new_size);
 439         if (!new_files)
 440                 return 1;
 441
 442         client->files = new_files;
 443         cf = &client->files[client->nr_files];
 444         cf->file = strdup(ini_file);
 445         cf->remote = remote;
 446         client->nr_files++;
 447         return 0;
 448 }
 449
 450 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 451 {
 452         struct fio_client *existing = *cookie;
 453         struct fio_client *client;
 454
 455         if (existing) {
 456                 /*
 457                  * We always add our "exec" name as the option, hence 1
 458                  * means empty.
 459                  */
 460                 if (existing->argc == 1)
 461                         flist_add_tail(&existing->arg_list, &arg_list);
 462                 else {
 463                         while (!flist_empty(&arg_list))
 464                                 flist_del_init(arg_list.next);
 465                 }
 466         }
 467
 468         client = get_new_client();
 469
 470         if (fio_server_parse_string(hostname, &client->hostname,
 471                                         &client->is_sock, &client->port,
 472                                         &client->addr.sin_addr,
 473                                         &client->addr6.sin6_addr,
 474                                         &client->ipv6))
 475                 return -1;
 476
 477         client->fd = -1;
 478         client->ops = ops;
 479         client->refs = 1;
 480         client->type = ops->client_type;
 481
 482         __fio_client_add_cmd_option(client, "fio");
 483
 484         flist_add(&client->list, &client_list);
 485         nr_clients++;
 486         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 487         *cookie = client;
 488         return 0;
 489 }
 490
 491 static const char *server_name(struct fio_client *client, char *buf,
 492                                size_t bufsize)
 493 {
 494         const char *from;
 495
 496         if (client->ipv6)
 497                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 498         else if (client->is_sock)
 499                 from = "sock";
 500         else
 501                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 502
 503         return from;
 504 }
 505
 506 static void probe_client(struct fio_client *client)
 507 {
 508         struct cmd_client_probe_pdu pdu;
 509         const char *sname;
 510         uint64_t tag;
 511         char buf[64];
 512
 513         dprint(FD_NET, "client: send probe\n");
 514
 515 #ifdef CONFIG_ZLIB
 516         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 517 #else
 518         pdu.flags = 0;
 519 #endif
 520
 521         sname = server_name(client, buf, sizeof(buf));
 522         memset(pdu.server, 0, sizeof(pdu.server));
 523         strncpy((char *) pdu.server, sname, sizeof(pdu.server) - 1);
 524
 525         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 526 }
 527
 528 static int fio_client_connect_ip(struct fio_client *client)
 529 {
 530         struct sockaddr *addr;
 531         socklen_t socklen;
 532         int fd, domain;
 533
 534         if (client->ipv6) {
 535                 client->addr6.sin6_family = AF_INET6;
 536                 client->addr6.sin6_port = htons(client->port);
 537                 domain = AF_INET6;
 538                 addr = (struct sockaddr *) &client->addr6;
 539                 socklen = sizeof(client->addr6);
 540         } else {
 541                 client->addr.sin_family = AF_INET;
 542                 client->addr.sin_port = htons(client->port);
 543                 domain = AF_INET;
 544                 addr = (struct sockaddr *) &client->addr;
 545                 socklen = sizeof(client->addr);
 546         }
 547
 548         fd = socket(domain, SOCK_STREAM, 0);
 549         if (fd < 0) {
 550                 int ret = -errno;
 551
 552                 log_err("fio: socket: %s\n", strerror(errno));
 553                 return ret;
 554         }
 555
 556         if (connect(fd, addr, socklen) < 0) {
 557                 int ret = -errno;
 558
 559                 log_err("fio: connect: %s\n", strerror(errno));
 560                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 561                                                                 client->port);
 562                 close(fd);
 563                 return ret;
 564         }
 565
 566         return fd;
 567 }
 568
 569 static int fio_client_connect_sock(struct fio_client *client)
 570 {
 571         struct sockaddr_un *addr = &client->addr_un;
 572         socklen_t len;
 573         int fd;
 574
 575         memset(addr, 0, sizeof(*addr));
 576         addr->sun_family = AF_UNIX;
 577         strncpy(addr->sun_path, client->hostname, sizeof(addr->sun_path) - 1);
 578
 579         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 580         if (fd < 0) {
 581                 int ret = -errno;
 582
 583                 log_err("fio: socket: %s\n", strerror(errno));
 584                 return ret;
 585         }
 586
 587         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 588         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 589                 int ret = -errno;
 590
 591                 log_err("fio: connect; %s\n", strerror(errno));
 592                 close(fd);
 593                 return ret;
 594         }
 595
 596         return fd;
 597 }
 598
 599 int fio_client_connect(struct fio_client *client)
 600 {
 601         int fd;
 602
 603         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 604
 605         if (client->is_sock)
 606                 fd = fio_client_connect_sock(client);
 607         else
 608                 fd = fio_client_connect_ip(client);
 609
 610         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 611
 612         if (fd < 0)
 613                 return fd;
 614
 615         client->fd = fd;
 616         fio_client_add_hash(client);
 617         client->state = Client_connected;
 618
 619         probe_client(client);
 620         return 0;
 621 }
 622
 623 int fio_client_terminate(struct fio_client *client)
 624 {
 625         return fio_net_send_quit(client->fd);
 626 }
 627
 628 static void fio_clients_terminate(void)
 629 {
 630         struct flist_head *entry;
 631         struct fio_client *client;
 632
 633         dprint(FD_NET, "client: terminate clients\n");
 634
 635         flist_for_each(entry, &client_list) {
 636                 client = flist_entry(entry, struct fio_client, list);
 637                 fio_client_terminate(client);
 638         }
 639 }
 640
 641 static void sig_int(int sig)
 642 {
 643         dprint(FD_NET, "client: got signal %d\n", sig);
 644         fio_clients_terminate();
 645 }
 646
 647 static void client_signal_handler(void)
 648 {
 649         struct sigaction act;
 650
 651         memset(&act, 0, sizeof(act));
 652         act.sa_handler = sig_int;
 653         act.sa_flags = SA_RESTART;
 654         sigaction(SIGINT, &act, NULL);
 655
 656         memset(&act, 0, sizeof(act));
 657         act.sa_handler = sig_int;
 658         act.sa_flags = SA_RESTART;
 659         sigaction(SIGTERM, &act, NULL);
 660
 661 /* Windows uses SIGBREAK as a quit signal from other applications */
 662 #ifdef WIN32
 663         memset(&act, 0, sizeof(act));
 664         act.sa_handler = sig_int;
 665         act.sa_flags = SA_RESTART;
 666         sigaction(SIGBREAK, &act, NULL);
 667 #endif
 668
 669         memset(&act, 0, sizeof(act));
 670         act.sa_handler = sig_show_status;
 671         act.sa_flags = SA_RESTART;
 672         sigaction(SIGUSR1, &act, NULL);
 673 }
 674
 675 static int send_client_cmd_line(struct fio_client *client)
 676 {
 677         struct cmd_single_line_pdu *cslp;
 678         struct cmd_line_pdu *clp;
 679         unsigned long offset;
 680         unsigned int *lens;
 681         void *pdu;
 682         size_t mem;
 683         int i, ret;
 684
 685         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 686
 687         lens = malloc(client->argc * sizeof(unsigned int));
 688
 689         /*
 690          * Find out how much mem we need
 691          */
 692         for (i = 0, mem = 0; i < client->argc; i++) {
 693                 lens[i] = strlen(client->argv[i]) + 1;
 694                 mem += lens[i];
 695         }
 696
 697         /*
 698          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 699          */
 700         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 701
 702         pdu = malloc(mem);
 703         clp = pdu;
 704         offset = sizeof(*clp);
 705
 706         for (i = 0; i < client->argc; i++) {
 707                 uint16_t arg_len = lens[i];
 708
 709                 cslp = pdu + offset;
 710                 strcpy((char *) cslp->text, client->argv[i]);
 711                 cslp->len = cpu_to_le16(arg_len);
 712                 offset += sizeof(*cslp) + arg_len;
 713         }
 714
 715         free(lens);
 716         clp->lines = cpu_to_le16(client->argc);
 717         clp->client_type = __cpu_to_le16(client->type);
 718         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 719         free(pdu);
 720         return ret;
 721 }
 722
 723 int fio_clients_connect(void)
 724 {
 725         struct fio_client *client;
 726         struct flist_head *entry, *tmp;
 727         int ret;
 728
 729 #ifdef WIN32
 730         WSADATA wsd;
 731         WSAStartup(MAKEWORD(2, 2), &wsd);
 732 #endif
 733
 734         dprint(FD_NET, "client: connect all\n");
 735
 736         client_signal_handler();
 737
 738         flist_for_each_safe(entry, tmp, &client_list) {
 739                 client = flist_entry(entry, struct fio_client, list);
 740
 741                 ret = fio_client_connect(client);
 742                 if (ret) {
 743                         remove_client(client);
 744                         continue;
 745                 }
 746
 747                 if (client->argc > 1)
 748                         send_client_cmd_line(client);
 749         }
 750
 751         return !nr_clients;
 752 }
 753
 754 int fio_start_client(struct fio_client *client)
 755 {
 756         dprint(FD_NET, "client: start %s\n", client->hostname);
 757         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 758 }
 759
 760 int fio_start_all_clients(void)
 761 {
 762         struct fio_client *client;
 763         struct flist_head *entry, *tmp;
 764         int ret;
 765
 766         dprint(FD_NET, "client: start all\n");
 767
 768         fio_client_json_init();
 769
 770         flist_for_each_safe(entry, tmp, &client_list) {
 771                 client = flist_entry(entry, struct fio_client, list);
 772
 773                 ret = fio_start_client(client);
 774                 if (ret) {
 775                         remove_client(client);
 776                         continue;
 777                 }
 778         }
 779
 780         return flist_empty(&client_list);
 781 }
 782
 783 static int __fio_client_send_remote_ini(struct fio_client *client,
 784                                         const char *filename)
 785 {
 786         struct cmd_load_file_pdu *pdu;
 787         size_t p_size;
 788         int ret;
 789
 790         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 791
 792         p_size = sizeof(*pdu) + strlen(filename) + 1;
 793         pdu = malloc(p_size);
 794         memset(pdu, 0, p_size);
 795         pdu->name_len = strlen(filename);
 796         strcpy((char *) pdu->file, filename);
 797         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 798
 799         client->sent_job = true;
 800         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 801         free(pdu);
 802         return ret;
 803 }
 804
 805 /*
 806  * Send file contents to server backend. We could use sendfile(), but to remain
 807  * more portable lets just read/write the darn thing.
 808  */
 809 static int __fio_client_send_local_ini(struct fio_client *client,
 810                                        const char *filename)
 811 {
 812         struct cmd_job_pdu *pdu;
 813         size_t p_size;
 814         struct stat sb;
 815         char *p;
 816         void *buf;
 817         off_t len;
 818         int fd, ret;
 819
 820         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 821
 822         fd = open(filename, O_RDONLY);
 823         if (fd < 0) {
 824                 ret = -errno;
 825                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 826                 return ret;
 827         }
 828
 829         if (fstat(fd, &sb) < 0) {
 830                 ret = -errno;
 831                 log_err("fio: job file stat: %s\n", strerror(errno));
 832                 close(fd);
 833                 return ret;
 834         }
 835
 836         /*
 837          * Add extra space for variable expansion, but doesn't guarantee.
 838          */
 839         sb.st_size += OPT_LEN_MAX;
 840         p_size = sb.st_size + sizeof(*pdu);
 841         pdu = malloc(p_size);
 842         buf = pdu->buf;
 843
 844         len = sb.st_size;
 845         p = buf;
 846         if (read_ini_data(fd, p, len)) {
 847                 log_err("fio: failed reading job file %s\n", filename);
 848                 close(fd);
 849                 free(pdu);
 850                 return 1;
 851         }
 852
 853         pdu->buf_len = __cpu_to_le32(sb.st_size);
 854         pdu->client_type = cpu_to_le32(client->type);
 855
 856         client->sent_job = true;
 857         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 858         free(pdu);
 859         close(fd);
 860         return ret;
 861 }
 862
 863 int fio_client_send_ini(struct fio_client *client, const char *filename,
 864                         bool remote)
 865 {
 866         int ret;
 867
 868         if (!remote)
 869                 ret = __fio_client_send_local_ini(client, filename);
 870         else
 871                 ret = __fio_client_send_remote_ini(client, filename);
 872
 873         if (!ret)
 874                 client->sent_job = true;
 875
 876         return ret;
 877 }
 878
 879 static int fio_client_send_cf(struct fio_client *client,
 880                               struct client_file *cf)
 881 {
 882         return fio_client_send_ini(client, cf->file, cf->remote);
 883 }
 884
 885 int fio_clients_send_ini(const char *filename)
 886 {
 887         struct fio_client *client;
 888         struct flist_head *entry, *tmp;
 889
 890         flist_for_each_safe(entry, tmp, &client_list) {
 891                 bool failed = false;
 892
 893                 client = flist_entry(entry, struct fio_client, list);
 894
 895                 if (client->nr_files) {
 896                         int i;
 897
 898                         for (i = 0; i < client->nr_files; i++) {
 899                                 struct client_file *cf;
 900
 901                                 cf = &client->files[i];
 902
 903                                 if (fio_client_send_cf(client, cf)) {
 904                                         failed = true;
 905                                         remove_client(client);
 906                                         break;
 907                                 }
 908                         }
 909                 }
 910                 if (client->sent_job || failed)
 911                         continue;
 912                 if (!filename || fio_client_send_ini(client, filename, 0))
 913                         remove_client(client);
 914         }
 915
 916         return !nr_clients;
 917 }
 918
 919 int fio_client_update_options(struct fio_client *client,
 920                               struct thread_options *o, uint64_t *tag)
 921 {
 922         struct cmd_add_job_pdu pdu;
 923
 924         pdu.thread_number = cpu_to_le32(client->thread_number);
 925         pdu.groupid = cpu_to_le32(client->groupid);
 926         convert_thread_options_to_net(&pdu.top, o);
 927
 928         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 929 }
 930
 931 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 932 {
 933         dst->max_val    = le64_to_cpu(src->max_val);
 934         dst->min_val    = le64_to_cpu(src->min_val);
 935         dst->samples    = le64_to_cpu(src->samples);
 936
 937         /*
 938          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 939          */
 940         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 941         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 942 }
 943
 944 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 945 {
 946         int i, j;
 947
 948         dst->error              = le32_to_cpu(src->error);
 949         dst->thread_number      = le32_to_cpu(src->thread_number);
 950         dst->groupid            = le32_to_cpu(src->groupid);
 951         dst->pid                = le32_to_cpu(src->pid);
 952         dst->members            = le32_to_cpu(src->members);
 953         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 954
 955         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 956                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 957                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 958                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 959                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 960                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 961         }
 962
 963         dst->usr_time           = le64_to_cpu(src->usr_time);
 964         dst->sys_time           = le64_to_cpu(src->sys_time);
 965         dst->ctx                = le64_to_cpu(src->ctx);
 966         dst->minf               = le64_to_cpu(src->minf);
 967         dst->majf               = le64_to_cpu(src->majf);
 968         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 969         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 970         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 971
 972         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 973                 fio_fp64_t *fps = &src->percentile_list[i];
 974                 fio_fp64_t *fpd = &dst->percentile_list[i];
 975
 976                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 977         }
 978
 979         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 980                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 981                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 982                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 983         }
 984
 985         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 986                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
 987         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 988                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
 989         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 990                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
 991
 992         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 993                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 994                         dst->io_u_plat[i][j] = le64_to_cpu(src->io_u_plat[i][j]);
 995
 996         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 997                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 998                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 999                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
1000         }
1001
1002         dst->total_submit       = le64_to_cpu(src->total_submit);
1003         dst->total_complete     = le64_to_cpu(src->total_complete);
1004         dst->nr_zone_resets     = le64_to_cpu(src->nr_zone_resets);
1005
1006         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1007                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
1008                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
1009         }
1010
1011         dst->total_run_time     = le64_to_cpu(src->total_run_time);
1012         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
1013         dst->total_err_count    = le64_to_cpu(src->total_err_count);
1014         dst->first_error        = le32_to_cpu(src->first_error);
1015         dst->kb_base            = le32_to_cpu(src->kb_base);
1016         dst->unit_base          = le32_to_cpu(src->unit_base);
1017
1018         dst->sig_figs           = le32_to_cpu(src->sig_figs);
1019
1020         dst->latency_depth      = le32_to_cpu(src->latency_depth);
1021         dst->latency_target     = le64_to_cpu(src->latency_target);
1022         dst->latency_window     = le64_to_cpu(src->latency_window);
1023         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
1024
1025         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
1026         for (i = 0; i < dst->nr_block_infos; i++)
1027                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
1028
1029         dst->ss_dur             = le64_to_cpu(src->ss_dur);
1030         dst->ss_state           = le32_to_cpu(src->ss_state);
1031         dst->ss_head            = le32_to_cpu(src->ss_head);
1032         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
1033         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
1034         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
1035         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
1036
1037         if (dst->ss_state & FIO_SS_DATA) {
1038                 for (i = 0; i < dst->ss_dur; i++ ) {
1039                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
1040                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
1041                 }
1042         }
1043
1044         dst->cachehit           = le64_to_cpu(src->cachehit);
1045         dst->cachemiss          = le64_to_cpu(src->cachemiss);
1046 }
1047
1048 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
1049 {
1050         int i;
1051
1052         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1053                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
1054                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
1055                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
1056                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
1057                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
1058                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
1059         }
1060
1061         dst->kb_base    = le32_to_cpu(src->kb_base);
1062         dst->unit_base  = le32_to_cpu(src->unit_base);
1063         dst->sig_figs   = le32_to_cpu(src->sig_figs);
1064         dst->groupid    = le32_to_cpu(src->groupid);
1065         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
1066 }
1067
1068 static void json_object_add_client_info(struct json_object *obj,
1069                                         struct fio_client *client)
1070 {
1071         const char *hostname = client->hostname ? client->hostname : "";
1072
1073         json_object_add_value_string(obj, "hostname", hostname);
1074         json_object_add_value_int(obj, "port", client->port);
1075 }
1076
1077 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1078 {
1079         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1080         struct flist_head *opt_list = NULL;
1081         struct json_object *tsobj;
1082
1083         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1084                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1085
1086         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, &client->buf);
1087         client->did_stat = true;
1088         if (tsobj) {
1089                 json_object_add_client_info(tsobj, client);
1090                 json_array_add_value_object(clients_array, tsobj);
1091         }
1092
1093         if (sum_stat_clients <= 1)
1094                 return;
1095
1096         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr == 1);
1097         sum_group_stats(&client_gs, &p->rs);
1098
1099         client_ts.members++;
1100         client_ts.thread_number = p->ts.thread_number;
1101         client_ts.groupid = p->ts.groupid;
1102         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1103         client_ts.sig_figs = p->ts.sig_figs;
1104
1105         if (++sum_stat_nr == sum_stat_clients) {
1106                 strcpy(client_ts.name, "All clients");
1107                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, &allclients);
1108                 if (tsobj) {
1109                         json_object_add_client_info(tsobj, client);
1110                         json_array_add_value_object(clients_array, tsobj);
1111                 }
1112         }
1113 }
1114
1115 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1116 {
1117         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1118
1119         if (output_format & FIO_OUTPUT_NORMAL)
1120                 show_group_stats(gs, &client->buf);
1121 }
1122
1123 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1124 {
1125         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1126         struct print_option *p;
1127
1128         if (!job_opt_object)
1129                 return;
1130
1131         pdu->global = le16_to_cpu(pdu->global);
1132         pdu->truncated = le16_to_cpu(pdu->truncated);
1133         pdu->groupid = le32_to_cpu(pdu->groupid);
1134
1135         p = malloc(sizeof(*p));
1136         p->name = strdup((char *) pdu->name);
1137         if (pdu->value[0] != '\0')
1138                 p->value = strdup((char *) pdu->value);
1139         else
1140                 p->value = NULL;
1141
1142         if (pdu->global) {
1143                 const char *pos = "";
1144
1145                 if (p->value)
1146                         pos = p->value;
1147
1148                 json_object_add_value_string(job_opt_object, p->name, pos);
1149         } else if (client->opt_lists) {
1150                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1151
1152                 flist_add_tail(&p->list, opt_list);
1153         }
1154 }
1155
1156 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1157 {
1158         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1159         const char *buf = (const char *) pdu->buf;
1160         const char *name;
1161         int fio_unused ret;
1162         struct buf_output out;
1163
1164         buf_output_init(&out);
1165
1166         name = client->name ? client->name : client->hostname;
1167
1168         if (!client->skip_newline && !(output_format & FIO_OUTPUT_TERSE))
1169                 __log_buf(&out, "<%s> ", name);
1170         __log_buf(&out, "%s", buf);
1171         log_info_buf(out.buf, out.buflen);
1172         buf_output_free(&out);
1173         client->skip_newline = strchr(buf, '\n') == NULL;
1174 }
1175
1176 static void convert_agg(struct disk_util_agg *agg)
1177 {
1178         int i;
1179
1180         for (i = 0; i < 2; i++) {
1181                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1182                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1183                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1184                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1185         }
1186
1187         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1188         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1189         agg->slavecount         = le32_to_cpu(agg->slavecount);
1190         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1191 }
1192
1193 static void convert_dus(struct disk_util_stat *dus)
1194 {
1195         int i;
1196
1197         for (i = 0; i < 2; i++) {
1198                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1199                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1200                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1201                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1202         }
1203
1204         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1205         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1206         dus->s.msec             = le64_to_cpu(dus->s.msec);
1207 }
1208
1209 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1210 {
1211         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1212
1213         if (!client->disk_stats_shown)
1214                 client->disk_stats_shown = true;
1215
1216         if (output_format & FIO_OUTPUT_JSON) {
1217                 struct json_object *duobj;
1218
1219                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1220                 duobj = json_array_last_value_object(du_array);
1221                 json_object_add_client_info(duobj, client);
1222         }
1223         if (output_format & FIO_OUTPUT_NORMAL) {
1224                 __log_buf(&client->buf, "\nDisk stats (read/write):\n");
1225                 print_disk_util(&du->dus, &du->agg, 0, &client->buf);
1226         }
1227         if (output_format & FIO_OUTPUT_TERSE && terse_version >= 3)
1228                 print_disk_util(&du->dus, &du->agg, 1, &client->buf);
1229 }
1230
1231 static void convert_jobs_eta(struct jobs_eta *je)
1232 {
1233         int i;
1234
1235         je->nr_running          = le32_to_cpu(je->nr_running);
1236         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1237         je->nr_pending          = le32_to_cpu(je->nr_pending);
1238         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1239         je->files_open          = le32_to_cpu(je->files_open);
1240
1241         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1242                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1243                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1244                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1245                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1246                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1247                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1248         }
1249
1250         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1251         je->eta_sec             = le64_to_cpu(je->eta_sec);
1252         je->nr_threads          = le32_to_cpu(je->nr_threads);
1253         je->is_pow2             = le32_to_cpu(je->is_pow2);
1254         je->unit_base           = le32_to_cpu(je->unit_base);
1255         je->sig_figs            = le32_to_cpu(je->sig_figs);
1256 }
1257
1258 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1259 {
1260         int i;
1261
1262         dst->nr_running         += je->nr_running;
1263         dst->nr_ramp            += je->nr_ramp;
1264         dst->nr_pending         += je->nr_pending;
1265         dst->nr_setting_up      += je->nr_setting_up;
1266         dst->files_open         += je->files_open;
1267
1268         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1269                 dst->m_rate[i]  += je->m_rate[i];
1270                 dst->t_rate[i]  += je->t_rate[i];
1271                 dst->m_iops[i]  += je->m_iops[i];
1272                 dst->t_iops[i]  += je->t_iops[i];
1273                 dst->rate[i]    += je->rate[i];
1274                 dst->iops[i]    += je->iops[i];
1275         }
1276
1277         dst->elapsed_sec        += je->elapsed_sec;
1278
1279         if (je->eta_sec > dst->eta_sec)
1280                 dst->eta_sec = je->eta_sec;
1281
1282         dst->nr_threads         += je->nr_threads;
1283
1284         /*
1285          * This wont be correct for multiple strings, but at least it
1286          * works for the basic cases.
1287          */
1288         strcpy((char *) dst->run_str, (char *) je->run_str);
1289 }
1290
1291 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1292 {
1293         struct fio_net_cmd_reply *reply = NULL;
1294         struct flist_head *entry;
1295
1296         flist_for_each(entry, &client->cmd_list) {
1297                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1298
1299                 if (cmd->tag == (uintptr_t) reply)
1300                         break;
1301
1302                 reply = NULL;
1303         }
1304
1305         if (!reply) {
1306                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1307                 return false;
1308         }
1309
1310         flist_del(&reply->list);
1311         cmd->tag = reply->saved_tag;
1312         free(reply);
1313         return true;
1314 }
1315
1316 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1317 {
1318         do {
1319                 struct fio_net_cmd_reply *reply = NULL;
1320                 struct flist_head *entry;
1321
1322                 flist_for_each(entry, &client->cmd_list) {
1323                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1324
1325                         if (tag == (uintptr_t) reply)
1326                                 break;
1327
1328                         reply = NULL;
1329                 }
1330
1331                 if (!reply)
1332                         break;
1333
1334                 usleep(1000);
1335         } while (1);
1336
1337         return 0;
1338 }
1339
1340 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1341 {
1342         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1343         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1344
1345         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1346
1347         assert(client->eta_in_flight == eta);
1348
1349         client->eta_in_flight = NULL;
1350         flist_del_init(&client->eta_list);
1351         client->eta_timeouts = 0;
1352
1353         if (client->ops->jobs_eta)
1354                 client->ops->jobs_eta(client, je);
1355
1356         fio_client_sum_jobs_eta(&eta->eta, je);
1357         fio_client_dec_jobs_eta(eta, client->ops->eta);
1358 }
1359
1360 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1361                                       uint64_t sample_size)
1362 {
1363         struct io_sample *s;
1364         int log_offset;
1365         uint64_t i, j, nr_samples;
1366         struct io_u_plat_entry *entry;
1367         uint64_t *io_u_plat;
1368
1369         int stride = 1 << hist_coarseness;
1370
1371         if (!sample_size)
1372                 return;
1373
1374         s = __get_sample(samples, 0, 0);
1375         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1376
1377         nr_samples = sample_size / __log_entry_sz(log_offset);
1378
1379         for (i = 0; i < nr_samples; i++) {
1380
1381                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1382                         i * sizeof(struct io_u_plat_entry));
1383
1384                 entry = s->data.plat_entry;
1385                 io_u_plat = entry->io_u_plat;
1386
1387                 fprintf(f, "%lu, %u, %llu, ", (unsigned long) s->time,
1388                                                 io_sample_ddir(s), (unsigned long long) s->bs);
1389                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1390                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1391                 }
1392                 fprintf(f, "%llu\n", (unsigned long long)
1393                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1394
1395         }
1396 }
1397
1398 static int fio_client_handle_iolog(struct fio_client *client,
1399                                    struct fio_net_cmd *cmd)
1400 {
1401         struct cmd_iolog_pdu *pdu = NULL;
1402         bool store_direct;
1403         char *log_pathname = NULL;
1404         int ret = 0;
1405
1406         pdu = convert_iolog(cmd, &store_direct);
1407         if (!pdu) {
1408                 log_err("fio: failed converting IO log\n");
1409                 ret = 1;
1410                 goto out;
1411         }
1412
1413         /* allocate buffer big enough for next sprintf() call */
1414         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1415                         strlen(client->hostname));
1416         if (!log_pathname) {
1417                 log_err("fio: memory allocation of unique pathname failed\n");
1418                 ret = -1;
1419                 goto out;
1420         }
1421         /* generate a unique pathname for the log file using hostname */
1422         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1423
1424         if (store_direct) {
1425                 ssize_t wrote;
1426                 size_t sz;
1427                 int fd;
1428
1429                 fd = open((const char *) log_pathname,
1430                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1431                 if (fd < 0) {
1432                         log_err("fio: open log %s: %s\n",
1433                                 log_pathname, strerror(errno));
1434                         ret = 1;
1435                         goto out;
1436                 }
1437
1438                 sz = cmd->pdu_len - sizeof(*pdu);
1439                 wrote = write(fd, pdu->samples, sz);
1440                 close(fd);
1441
1442                 if (wrote != sz) {
1443                         log_err("fio: short write on compressed log\n");
1444                         ret = 1;
1445                         goto out;
1446                 }
1447
1448                 ret = 0;
1449         } else {
1450                 FILE *f;
1451                 f = fopen((const char *) log_pathname, "w");
1452                 if (!f) {
1453                         log_err("fio: fopen log %s : %s\n",
1454                                 log_pathname, strerror(errno));
1455                         ret = 1;
1456                         goto out;
1457                 }
1458
1459                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1460                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1461                                            pdu->nr_samples * sizeof(struct io_sample));
1462                 } else {
1463                         flush_samples(f, pdu->samples,
1464                                         pdu->nr_samples * sizeof(struct io_sample));
1465                 }
1466                 fclose(f);
1467                 ret = 0;
1468         }
1469
1470 out:
1471         if (pdu && pdu != (void *) cmd->payload)
1472                 free(pdu);
1473
1474         if (log_pathname)
1475                 free(log_pathname);
1476
1477         return ret;
1478 }
1479
1480 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1481 {
1482         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1483         const char *os, *arch;
1484         char bit[16];
1485
1486         os = fio_get_os_string(probe->os);
1487         if (!os)
1488                 os = "unknown";
1489
1490         arch = fio_get_arch_string(probe->arch);
1491         if (!arch)
1492                 os = "unknown";
1493
1494         sprintf(bit, "%d-bit", probe->bpp * 8);
1495         probe->flags = le64_to_cpu(probe->flags);
1496
1497         if (output_format & FIO_OUTPUT_NORMAL) {
1498                 log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1499                         probe->hostname, probe->bigendian, bit, os, arch,
1500                         probe->fio_version, (unsigned long) probe->flags);
1501         }
1502
1503         if (!client->name)
1504                 client->name = strdup((char *) probe->hostname);
1505 }
1506
1507 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1508 {
1509         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1510
1511         client->state = Client_started;
1512         client->jobs = le32_to_cpu(pdu->jobs);
1513         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1514
1515         if (client->jobs) {
1516                 int i;
1517
1518                 if (client->opt_lists)
1519                         free(client->opt_lists);
1520
1521                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1522                 for (i = 0; i < client->jobs; i++)
1523                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1524         }
1525
1526         sum_stat_clients += client->nr_stat;
1527 }
1528
1529 static void handle_stop(struct fio_client *client)
1530 {
1531         if (client->error)
1532                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1533 }
1534
1535 static void convert_stop(struct fio_net_cmd *cmd)
1536 {
1537         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1538
1539         pdu->error = le32_to_cpu(pdu->error);
1540 }
1541
1542 static void convert_text(struct fio_net_cmd *cmd)
1543 {
1544         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1545
1546         pdu->level      = le32_to_cpu(pdu->level);
1547         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1548         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1549         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1550 }
1551
1552 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1553                                               struct cmd_iolog_pdu *pdu)
1554 {
1555 #ifdef CONFIG_ZLIB
1556         struct cmd_iolog_pdu *ret;
1557         z_stream stream;
1558         uint64_t nr_samples;
1559         size_t total;
1560         char *p;
1561
1562         stream.zalloc = Z_NULL;
1563         stream.zfree = Z_NULL;
1564         stream.opaque = Z_NULL;
1565         stream.avail_in = 0;
1566         stream.next_in = Z_NULL;
1567
1568         if (inflateInit(&stream) != Z_OK)
1569                 return NULL;
1570
1571         /*
1572          * Get header first, it's not compressed
1573          */
1574         nr_samples = le64_to_cpu(pdu->nr_samples);
1575
1576         if (pdu->log_type == IO_LOG_TYPE_HIST)
1577                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1578                                         sizeof(struct io_u_plat_entry));
1579         else
1580                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1581         ret = malloc(total + sizeof(*pdu));
1582         ret->nr_samples = nr_samples;
1583
1584         memcpy(ret, pdu, sizeof(*pdu));
1585
1586         p = (char *) ret + sizeof(*pdu);
1587
1588         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1589         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1590         while (stream.avail_in) {
1591                 unsigned int this_chunk = 65536;
1592                 unsigned int this_len;
1593                 int err;
1594
1595                 if (this_chunk > total)
1596                         this_chunk = total;
1597
1598                 stream.avail_out = this_chunk;
1599                 stream.next_out = (void *)p;
1600                 err = inflate(&stream, Z_NO_FLUSH);
1601                 /* may be Z_OK, or Z_STREAM_END */
1602                 if (err < 0) {
1603                         /*
1604                          * Z_STREAM_ERROR and Z_BUF_ERROR can safely be
1605                          * ignored */
1606                         if (err == Z_STREAM_ERROR || err == Z_BUF_ERROR)
1607                                 break;
1608                         log_err("fio: inflate error %d\n", err);
1609                         free(ret);
1610                         ret = NULL;
1611                         goto err;
1612                 }
1613
1614                 this_len = this_chunk - stream.avail_out;
1615                 p += this_len;
1616                 total -= this_len;
1617         }
1618
1619 err:
1620         inflateEnd(&stream);
1621         return ret;
1622 #else
1623         return NULL;
1624 #endif
1625 }
1626
1627 /*
1628  * This has been compressed on the server side, since it can be big.
1629  * Uncompress here.
1630  */
1631 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1632                                            bool *store_direct)
1633 {
1634         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1635         struct cmd_iolog_pdu *ret;
1636         uint64_t i;
1637         int compressed;
1638         void *samples;
1639
1640         *store_direct = false;
1641
1642         /*
1643          * Convert if compressed and we support it. If it's not
1644          * compressed, we need not do anything.
1645          */
1646         compressed = le32_to_cpu(pdu->compressed);
1647         if (compressed == XMIT_COMPRESSED) {
1648 #ifndef CONFIG_ZLIB
1649                 log_err("fio: server sent compressed data by mistake\n");
1650                 return NULL;
1651 #endif
1652                 ret = convert_iolog_gz(cmd, pdu);
1653                 if (!ret) {
1654                         log_err("fio: failed decompressing log\n");
1655                         return NULL;
1656                 }
1657         } else if (compressed == STORE_COMPRESSED) {
1658                 *store_direct = true;
1659                 ret = pdu;
1660         } else
1661                 ret = pdu;
1662
1663         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1664         ret->thread_number      = le32_to_cpu(ret->thread_number);
1665         ret->log_type           = le32_to_cpu(ret->log_type);
1666         ret->compressed         = le32_to_cpu(ret->compressed);
1667         ret->log_offset         = le32_to_cpu(ret->log_offset);
1668         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1669
1670         if (*store_direct)
1671                 return ret;
1672
1673         samples = &ret->samples[0];
1674         for (i = 0; i < ret->nr_samples; i++) {
1675                 struct io_sample *s;
1676
1677                 s = __get_sample(samples, ret->log_offset, i);
1678                 if (ret->log_type == IO_LOG_TYPE_HIST)
1679                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1680
1681                 s->time         = le64_to_cpu(s->time);
1682                 s->data.val     = le64_to_cpu(s->data.val);
1683                 s->__ddir       = le32_to_cpu(s->__ddir);
1684                 s->bs           = le64_to_cpu(s->bs);
1685
1686                 if (ret->log_offset) {
1687                         struct io_sample_offset *so = (void *) s;
1688
1689                         so->offset = le64_to_cpu(so->offset);
1690                 }
1691
1692                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1693                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1694                         s->data.plat_entry->list.next = NULL;
1695                         s->data.plat_entry->list.prev = NULL;
1696                 }
1697         }
1698
1699         return ret;
1700 }
1701
1702 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1703                            size_t size, uint64_t tag)
1704 {
1705         rep->error = cpu_to_le32(rep->error);
1706         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1707 }
1708
1709 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1710                          uint64_t tag)
1711 {
1712         struct cmd_sendfile_reply *rep;
1713         struct stat sb;
1714         size_t size;
1715         int fd;
1716
1717         size = sizeof(*rep);
1718         rep = malloc(size);
1719
1720         if (stat((char *)pdu->path, &sb) < 0) {
1721 fail:
1722                 rep->error = errno;
1723                 sendfile_reply(client->fd, rep, size, tag);
1724                 free(rep);
1725                 return 1;
1726         }
1727
1728         size += sb.st_size;
1729         rep = realloc(rep, size);
1730         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1731
1732         fd = open((char *)pdu->path, O_RDONLY);
1733         if (fd == -1 )
1734                 goto fail;
1735
1736         rep->error = read_data(fd, &rep->data, sb.st_size);
1737         sendfile_reply(client->fd, rep, size, tag);
1738         free(rep);
1739         close(fd);
1740         return 0;
1741 }
1742
1743 int fio_handle_client(struct fio_client *client)
1744 {
1745         struct client_ops *ops = client->ops;
1746         struct fio_net_cmd *cmd;
1747         int size;
1748
1749         dprint(FD_NET, "client: handle %s\n", client->hostname);
1750
1751         cmd = fio_net_recv_cmd(client->fd, true);
1752         if (!cmd)
1753                 return 0;
1754
1755         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1756                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1757
1758         client->last_cmd = cmd->opcode;
1759
1760         switch (cmd->opcode) {
1761         case FIO_NET_CMD_QUIT:
1762                 if (ops->quit)
1763                         ops->quit(client, cmd);
1764                 remove_client(client);
1765                 break;
1766         case FIO_NET_CMD_TEXT:
1767                 convert_text(cmd);
1768                 ops->text(client, cmd);
1769                 break;
1770         case FIO_NET_CMD_DU: {
1771                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1772
1773                 convert_dus(&du->dus);
1774                 convert_agg(&du->agg);
1775
1776                 ops->disk_util(client, cmd);
1777                 break;
1778                 }
1779         case FIO_NET_CMD_TS: {
1780                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1781
1782                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1783                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1784                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1785
1786                         size = le64_to_cpu(p->ts.ss_dur);
1787                         p->ts.ss_iops_data = (uint64_t *) ((struct cmd_ts_pdu *)cmd->payload + 1);
1788                         p->ts.ss_bw_data = p->ts.ss_iops_data + size;
1789                 }
1790
1791                 convert_ts(&p->ts, &p->ts);
1792                 convert_gs(&p->rs, &p->rs);
1793
1794                 ops->thread_status(client, cmd);
1795                 break;
1796                 }
1797         case FIO_NET_CMD_GS: {
1798                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1799
1800                 convert_gs(gs, gs);
1801
1802                 ops->group_stats(client, cmd);
1803                 break;
1804                 }
1805         case FIO_NET_CMD_ETA: {
1806                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1807
1808                 if (!remove_reply_cmd(client, cmd))
1809                         break;
1810                 convert_jobs_eta(je);
1811                 handle_eta(client, cmd);
1812                 break;
1813                 }
1814         case FIO_NET_CMD_PROBE:
1815                 remove_reply_cmd(client, cmd);
1816                 ops->probe(client, cmd);
1817                 break;
1818         case FIO_NET_CMD_SERVER_START:
1819                 client->state = Client_running;
1820                 if (ops->job_start)
1821                         ops->job_start(client, cmd);
1822                 break;
1823         case FIO_NET_CMD_START: {
1824                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1825
1826                 pdu->jobs = le32_to_cpu(pdu->jobs);
1827                 ops->start(client, cmd);
1828                 break;
1829                 }
1830         case FIO_NET_CMD_STOP: {
1831                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1832
1833                 convert_stop(cmd);
1834                 client->state = Client_stopped;
1835                 client->error = le32_to_cpu(pdu->error);
1836                 client->signal = le32_to_cpu(pdu->signal);
1837                 ops->stop(client);
1838                 break;
1839                 }
1840         case FIO_NET_CMD_ADD_JOB: {
1841                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1842
1843                 client->thread_number = le32_to_cpu(pdu->thread_number);
1844                 client->groupid = le32_to_cpu(pdu->groupid);
1845
1846                 if (ops->add_job)
1847                         ops->add_job(client, cmd);
1848                 break;
1849                 }
1850         case FIO_NET_CMD_IOLOG:
1851                 fio_client_handle_iolog(client, cmd);
1852                 break;
1853         case FIO_NET_CMD_UPDATE_JOB:
1854                 ops->update_job(client, cmd);
1855                 remove_reply_cmd(client, cmd);
1856                 break;
1857         case FIO_NET_CMD_VTRIGGER: {
1858                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1859                 char buf[128];
1860                 int off = 0;
1861
1862                 if (aux_path) {
1863                         strcpy(buf, aux_path);
1864                         off = strlen(buf);
1865                 }
1866
1867                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1868                 exec_trigger(trigger_cmd);
1869                 break;
1870                 }
1871         case FIO_NET_CMD_SENDFILE: {
1872                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1873                 fio_send_file(client, pdu, cmd->tag);
1874                 break;
1875                 }
1876         case FIO_NET_CMD_JOB_OPT: {
1877                 handle_job_opt(client, cmd);
1878                 break;
1879         }
1880         default:
1881                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1882                 break;
1883         }
1884
1885         free(cmd);
1886         return 1;
1887 }
1888
1889 int fio_clients_send_trigger(const char *cmd)
1890 {
1891         struct flist_head *entry;
1892         struct fio_client *client;
1893         size_t slen;
1894
1895         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1896
1897         if (!cmd)
1898                 slen = 0;
1899         else
1900                 slen = strlen(cmd);
1901
1902         flist_for_each(entry, &client_list) {
1903                 struct cmd_vtrigger_pdu *pdu;
1904
1905                 client = flist_entry(entry, struct fio_client, list);
1906
1907                 pdu = malloc(sizeof(*pdu) + slen);
1908                 pdu->len = cpu_to_le16((uint16_t) slen);
1909                 if (slen)
1910                         memcpy(pdu->cmd, cmd, slen);
1911                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1912                                         sizeof(*pdu) + slen, NULL, NULL);
1913                 free(pdu);
1914         }
1915
1916         return 0;
1917 }
1918
1919 static void request_client_etas(struct client_ops *ops)
1920 {
1921         struct fio_client *client;
1922         struct flist_head *entry;
1923         struct client_eta *eta;
1924         int skipped = 0;
1925
1926         if (eta_print == FIO_ETA_NEVER)
1927                 return;
1928
1929         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1930
1931         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1932         eta->pending = nr_clients;
1933
1934         flist_for_each(entry, &client_list) {
1935                 client = flist_entry(entry, struct fio_client, list);
1936
1937                 if (!flist_empty(&client->eta_list)) {
1938                         skipped++;
1939                         continue;
1940                 }
1941                 if (client->state != Client_running)
1942                         continue;
1943
1944                 assert(!client->eta_in_flight);
1945                 flist_add_tail(&client->eta_list, &eta_list);
1946                 client->eta_in_flight = eta;
1947                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1948                                         (uintptr_t) eta, &client->cmd_list);
1949         }
1950
1951         while (skipped--) {
1952                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1953                         break;
1954         }
1955
1956         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1957 }
1958
1959 /*
1960  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
1961  */
1962 static int handle_cmd_timeout(struct fio_client *client,
1963                               struct fio_net_cmd_reply *reply)
1964 {
1965         uint16_t reply_opcode = reply->opcode;
1966
1967         flist_del(&reply->list);
1968         free(reply);
1969
1970         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
1971                 return 1;
1972
1973         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
1974
1975         flist_del_init(&client->eta_list);
1976         if (client->eta_in_flight) {
1977                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
1978                 client->eta_in_flight = NULL;
1979         }
1980
1981         /*
1982          * If we fail 5 in a row, give up...
1983          */
1984         if (client->eta_timeouts++ > 5)
1985                 return 1;
1986
1987         return 0;
1988 }
1989
1990 static int client_check_cmd_timeout(struct fio_client *client,
1991                                     struct timespec *now)
1992 {
1993         struct fio_net_cmd_reply *reply;
1994         struct flist_head *entry, *tmp;
1995         int ret = 0;
1996
1997         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1998                 unsigned int op;
1999
2000                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
2001
2002                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
2003                         continue;
2004
2005                 op = reply->opcode;
2006                 if (!handle_cmd_timeout(client, reply))
2007                         continue;
2008
2009                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
2010                                                 fio_server_op(op));
2011                 ret = 1;
2012         }
2013
2014         return flist_empty(&client->cmd_list) && ret;
2015 }
2016
2017 static int fio_check_clients_timed_out(void)
2018 {
2019         struct fio_client *client;
2020         struct flist_head *entry, *tmp;
2021         struct timespec ts;
2022         int ret = 0;
2023
2024         fio_gettime(&ts, NULL);
2025
2026         flist_for_each_safe(entry, tmp, &client_list) {
2027                 client = flist_entry(entry, struct fio_client, list);
2028
2029                 if (flist_empty(&client->cmd_list))
2030                         continue;
2031
2032                 if (!client_check_cmd_timeout(client, &ts))
2033                         continue;
2034
2035                 if (client->ops->timed_out)
2036                         client->ops->timed_out(client);
2037                 else
2038                         log_err("fio: client %s timed out\n", client->hostname);
2039
2040                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
2041                         client->error = ETIMEDOUT;
2042                 else
2043                         log_info("fio: ignoring timeout due to vtrigger\n");
2044                 remove_client(client);
2045                 ret = 1;
2046         }
2047
2048         return ret;
2049 }
2050
2051 int fio_handle_clients(struct client_ops *ops)
2052 {
2053         struct pollfd *pfds;
2054         int i, ret = 0, retval = 0;
2055
2056         fio_gettime(&eta_ts, NULL);
2057
2058         pfds = malloc(nr_clients * sizeof(struct pollfd));
2059
2060         init_thread_stat(&client_ts);
2061         init_group_run_stat(&client_gs);
2062
2063         while (!exit_backend && nr_clients) {
2064                 struct flist_head *entry, *tmp;
2065                 struct fio_client *client;
2066
2067                 i = 0;
2068                 flist_for_each_safe(entry, tmp, &client_list) {
2069                         client = flist_entry(entry, struct fio_client, list);
2070
2071                         if (!client->sent_job && !client->ops->stay_connected &&
2072                             flist_empty(&client->cmd_list)) {
2073                                 remove_client(client);
2074                                 continue;
2075                         }
2076
2077                         pfds[i].fd = client->fd;
2078                         pfds[i].events = POLLIN;
2079                         i++;
2080                 }
2081
2082                 if (!nr_clients)
2083                         break;
2084
2085                 assert(i == nr_clients);
2086
2087                 do {
2088                         struct timespec ts;
2089                         int timeout;
2090
2091                         fio_gettime(&ts, NULL);
2092                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2093                                 request_client_etas(ops);
2094                                 memcpy(&eta_ts, &ts, sizeof(ts));
2095
2096                                 if (fio_check_clients_timed_out())
2097                                         break;
2098                         }
2099
2100                         check_trigger_file();
2101
2102                         timeout = min(100u, ops->eta_msec);
2103
2104                         ret = poll(pfds, nr_clients, timeout);
2105                         if (ret < 0) {
2106                                 if (errno == EINTR)
2107                                         continue;
2108                                 log_err("fio: poll clients: %s\n", strerror(errno));
2109                                 break;
2110                         } else if (!ret)
2111                                 continue;
2112                 } while (ret <= 0);
2113
2114                 for (i = 0; i < nr_clients; i++) {
2115                         if (!(pfds[i].revents & POLLIN))
2116                                 continue;
2117
2118                         client = find_client_by_fd(pfds[i].fd);
2119                         if (!client) {
2120                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2121                                 continue;
2122                         }
2123                         if (!fio_handle_client(client)) {
2124                                 log_info("client: host=%s disconnected\n",
2125                                                 client->hostname);
2126                                 remove_client(client);
2127                                 retval = 1;
2128                         } else if (client->error)
2129                                 retval = 1;
2130                         fio_put_client(client);
2131                 }
2132         }
2133
2134         log_info_buf(allclients.buf, allclients.buflen);
2135         buf_output_free(&allclients);
2136
2137         fio_client_json_fini();
2138
2139         free(pfds);
2140         return retval || error_clients;
2141 }
2142
2143 static void client_display_thread_status(struct jobs_eta *je)
2144 {
2145         if (!(output_format & FIO_OUTPUT_JSON))
2146                 display_thread_status(je);
2147 }