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         snprintf((char *) pdu.server, sizeof(pdu.server), "%s", sname);
 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         snprintf(addr->sun_path, sizeof(addr->sun_path), "%s",
 578                  client->hostname);
 579
 580         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 581         if (fd < 0) {
 582                 int ret = -errno;
 583
 584                 log_err("fio: socket: %s\n", strerror(errno));
 585                 return ret;
 586         }
 587
 588         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 589         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 590                 int ret = -errno;
 591
 592                 log_err("fio: connect; %s\n", strerror(errno));
 593                 close(fd);
 594                 return ret;
 595         }
 596
 597         return fd;
 598 }
 599
 600 int fio_client_connect(struct fio_client *client)
 601 {
 602         int fd;
 603
 604         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 605
 606         if (client->is_sock)
 607                 fd = fio_client_connect_sock(client);
 608         else
 609                 fd = fio_client_connect_ip(client);
 610
 611         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 612
 613         if (fd < 0)
 614                 return fd;
 615
 616         client->fd = fd;
 617         fio_client_add_hash(client);
 618         client->state = Client_connected;
 619
 620         probe_client(client);
 621         return 0;
 622 }
 623
 624 int fio_client_terminate(struct fio_client *client)
 625 {
 626         return fio_net_send_quit(client->fd);
 627 }
 628
 629 static void fio_clients_terminate(void)
 630 {
 631         struct flist_head *entry;
 632         struct fio_client *client;
 633
 634         dprint(FD_NET, "client: terminate clients\n");
 635
 636         flist_for_each(entry, &client_list) {
 637                 client = flist_entry(entry, struct fio_client, list);
 638                 fio_client_terminate(client);
 639         }
 640 }
 641
 642 static void sig_int(int sig)
 643 {
 644         dprint(FD_NET, "client: got signal %d\n", sig);
 645         fio_clients_terminate();
 646 }
 647
 648 static void client_signal_handler(void)
 649 {
 650         struct sigaction act;
 651
 652         memset(&act, 0, sizeof(act));
 653         act.sa_handler = sig_int;
 654         act.sa_flags = SA_RESTART;
 655         sigaction(SIGINT, &act, NULL);
 656
 657         memset(&act, 0, sizeof(act));
 658         act.sa_handler = sig_int;
 659         act.sa_flags = SA_RESTART;
 660         sigaction(SIGTERM, &act, NULL);
 661
 662 /* Windows uses SIGBREAK as a quit signal from other applications */
 663 #ifdef WIN32
 664         memset(&act, 0, sizeof(act));
 665         act.sa_handler = sig_int;
 666         act.sa_flags = SA_RESTART;
 667         sigaction(SIGBREAK, &act, NULL);
 668 #endif
 669
 670         memset(&act, 0, sizeof(act));
 671         act.sa_handler = sig_show_status;
 672         act.sa_flags = SA_RESTART;
 673         sigaction(SIGUSR1, &act, NULL);
 674 }
 675
 676 static int send_client_cmd_line(struct fio_client *client)
 677 {
 678         struct cmd_single_line_pdu *cslp;
 679         struct cmd_line_pdu *clp;
 680         unsigned long offset;
 681         unsigned int *lens;
 682         void *pdu;
 683         size_t mem;
 684         int i, ret;
 685
 686         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 687
 688         lens = malloc(client->argc * sizeof(unsigned int));
 689
 690         /*
 691          * Find out how much mem we need
 692          */
 693         for (i = 0, mem = 0; i < client->argc; i++) {
 694                 lens[i] = strlen(client->argv[i]) + 1;
 695                 mem += lens[i];
 696         }
 697
 698         /*
 699          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 700          */
 701         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 702
 703         pdu = malloc(mem);
 704         clp = pdu;
 705         offset = sizeof(*clp);
 706
 707         for (i = 0; i < client->argc; i++) {
 708                 uint16_t arg_len = lens[i];
 709
 710                 cslp = pdu + offset;
 711                 strcpy((char *) cslp->text, client->argv[i]);
 712                 cslp->len = cpu_to_le16(arg_len);
 713                 offset += sizeof(*cslp) + arg_len;
 714         }
 715
 716         free(lens);
 717         clp->lines = cpu_to_le16(client->argc);
 718         clp->client_type = __cpu_to_le16(client->type);
 719         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 720         free(pdu);
 721         return ret;
 722 }
 723
 724 int fio_clients_connect(void)
 725 {
 726         struct fio_client *client;
 727         struct flist_head *entry, *tmp;
 728         int ret;
 729
 730 #ifdef WIN32
 731         WSADATA wsd;
 732         WSAStartup(MAKEWORD(2, 2), &wsd);
 733 #endif
 734
 735         dprint(FD_NET, "client: connect all\n");
 736
 737         client_signal_handler();
 738
 739         flist_for_each_safe(entry, tmp, &client_list) {
 740                 client = flist_entry(entry, struct fio_client, list);
 741
 742                 ret = fio_client_connect(client);
 743                 if (ret) {
 744                         remove_client(client);
 745                         continue;
 746                 }
 747
 748                 if (client->argc > 1)
 749                         send_client_cmd_line(client);
 750         }
 751
 752         return !nr_clients;
 753 }
 754
 755 int fio_start_client(struct fio_client *client)
 756 {
 757         dprint(FD_NET, "client: start %s\n", client->hostname);
 758         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 759 }
 760
 761 int fio_start_all_clients(void)
 762 {
 763         struct fio_client *client;
 764         struct flist_head *entry, *tmp;
 765         int ret;
 766
 767         dprint(FD_NET, "client: start all\n");
 768
 769         fio_client_json_init();
 770
 771         flist_for_each_safe(entry, tmp, &client_list) {
 772                 client = flist_entry(entry, struct fio_client, list);
 773
 774                 ret = fio_start_client(client);
 775                 if (ret) {
 776                         remove_client(client);
 777                         continue;
 778                 }
 779         }
 780
 781         return flist_empty(&client_list);
 782 }
 783
 784 static int __fio_client_send_remote_ini(struct fio_client *client,
 785                                         const char *filename)
 786 {
 787         struct cmd_load_file_pdu *pdu;
 788         size_t p_size;
 789         int ret;
 790
 791         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 792
 793         p_size = sizeof(*pdu) + strlen(filename) + 1;
 794         pdu = malloc(p_size);
 795         memset(pdu, 0, p_size);
 796         pdu->name_len = strlen(filename);
 797         strcpy((char *) pdu->file, filename);
 798         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 799
 800         client->sent_job = true;
 801         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 802         free(pdu);
 803         return ret;
 804 }
 805
 806 /*
 807  * Send file contents to server backend. We could use sendfile(), but to remain
 808  * more portable lets just read/write the darn thing.
 809  */
 810 static int __fio_client_send_local_ini(struct fio_client *client,
 811                                        const char *filename)
 812 {
 813         struct cmd_job_pdu *pdu;
 814         size_t p_size;
 815         struct stat sb;
 816         char *p;
 817         void *buf;
 818         off_t len;
 819         int fd, ret;
 820
 821         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 822
 823         fd = open(filename, O_RDONLY);
 824         if (fd < 0) {
 825                 ret = -errno;
 826                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 827                 return ret;
 828         }
 829
 830         if (fstat(fd, &sb) < 0) {
 831                 ret = -errno;
 832                 log_err("fio: job file stat: %s\n", strerror(errno));
 833                 close(fd);
 834                 return ret;
 835         }
 836
 837         /*
 838          * Add extra space for variable expansion, but doesn't guarantee.
 839          */
 840         sb.st_size += OPT_LEN_MAX;
 841         p_size = sb.st_size + sizeof(*pdu);
 842         pdu = malloc(p_size);
 843         buf = pdu->buf;
 844
 845         len = sb.st_size;
 846         p = buf;
 847         if (read_ini_data(fd, p, len)) {
 848                 log_err("fio: failed reading job file %s\n", filename);
 849                 close(fd);
 850                 free(pdu);
 851                 return 1;
 852         }
 853
 854         pdu->buf_len = __cpu_to_le32(sb.st_size);
 855         pdu->client_type = cpu_to_le32(client->type);
 856
 857         client->sent_job = true;
 858         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 859         free(pdu);
 860         close(fd);
 861         return ret;
 862 }
 863
 864 int fio_client_send_ini(struct fio_client *client, const char *filename,
 865                         bool remote)
 866 {
 867         int ret;
 868
 869         if (!remote)
 870                 ret = __fio_client_send_local_ini(client, filename);
 871         else
 872                 ret = __fio_client_send_remote_ini(client, filename);
 873
 874         if (!ret)
 875                 client->sent_job = true;
 876
 877         return ret;
 878 }
 879
 880 static int fio_client_send_cf(struct fio_client *client,
 881                               struct client_file *cf)
 882 {
 883         return fio_client_send_ini(client, cf->file, cf->remote);
 884 }
 885
 886 int fio_clients_send_ini(const char *filename)
 887 {
 888         struct fio_client *client;
 889         struct flist_head *entry, *tmp;
 890
 891         flist_for_each_safe(entry, tmp, &client_list) {
 892                 bool failed = false;
 893
 894                 client = flist_entry(entry, struct fio_client, list);
 895
 896                 if (client->nr_files) {
 897                         int i;
 898
 899                         for (i = 0; i < client->nr_files; i++) {
 900                                 struct client_file *cf;
 901
 902                                 cf = &client->files[i];
 903
 904                                 if (fio_client_send_cf(client, cf)) {
 905                                         failed = true;
 906                                         remove_client(client);
 907                                         break;
 908                                 }
 909                         }
 910                 }
 911                 if (client->sent_job || failed)
 912                         continue;
 913                 if (!filename || fio_client_send_ini(client, filename, 0))
 914                         remove_client(client);
 915         }
 916
 917         return !nr_clients;
 918 }
 919
 920 int fio_client_update_options(struct fio_client *client,
 921                               struct thread_options *o, uint64_t *tag)
 922 {
 923         struct cmd_add_job_pdu pdu;
 924
 925         pdu.thread_number = cpu_to_le32(client->thread_number);
 926         pdu.groupid = cpu_to_le32(client->groupid);
 927         convert_thread_options_to_net(&pdu.top, o);
 928
 929         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 930 }
 931
 932 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 933 {
 934         dst->max_val    = le64_to_cpu(src->max_val);
 935         dst->min_val    = le64_to_cpu(src->min_val);
 936         dst->samples    = le64_to_cpu(src->samples);
 937
 938         /*
 939          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 940          */
 941         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 942         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 943 }
 944
 945 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 946 {
 947         int i, j;
 948
 949         dst->error              = le32_to_cpu(src->error);
 950         dst->thread_number      = le32_to_cpu(src->thread_number);
 951         dst->groupid            = le32_to_cpu(src->groupid);
 952         dst->pid                = le32_to_cpu(src->pid);
 953         dst->members            = le32_to_cpu(src->members);
 954         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 955
 956         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 957                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 958                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 959                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 960                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 961                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 962         }
 963         convert_io_stat(&dst->sync_stat, &src->sync_stat);
 964
 965         dst->usr_time           = le64_to_cpu(src->usr_time);
 966         dst->sys_time           = le64_to_cpu(src->sys_time);
 967         dst->ctx                = le64_to_cpu(src->ctx);
 968         dst->minf               = le64_to_cpu(src->minf);
 969         dst->majf               = le64_to_cpu(src->majf);
 970         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 971         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 972         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 973
 974         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 975                 fio_fp64_t *fps = &src->percentile_list[i];
 976                 fio_fp64_t *fpd = &dst->percentile_list[i];
 977
 978                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 979         }
 980
 981         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 982                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 983                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 984                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 985         }
 986
 987         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 988                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
 989         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 990                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
 991         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 992                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
 993
 994         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 995                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 996                         dst->io_u_plat[i][j] = le64_to_cpu(src->io_u_plat[i][j]);
 997
 998         for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 999                 dst->io_u_sync_plat[j] = le64_to_cpu(src->io_u_sync_plat[j]);
1000
1001         for (i = 0; i < DDIR_RWDIR_SYNC_CNT; i++)
1002                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
1003
1004         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1005                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
1006                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
1007         }
1008
1009         dst->total_submit       = le64_to_cpu(src->total_submit);
1010         dst->total_complete     = le64_to_cpu(src->total_complete);
1011         dst->nr_zone_resets     = le64_to_cpu(src->nr_zone_resets);
1012
1013         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1014                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
1015                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
1016         }
1017
1018         dst->total_run_time     = le64_to_cpu(src->total_run_time);
1019         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
1020         dst->total_err_count    = le64_to_cpu(src->total_err_count);
1021         dst->first_error        = le32_to_cpu(src->first_error);
1022         dst->kb_base            = le32_to_cpu(src->kb_base);
1023         dst->unit_base          = le32_to_cpu(src->unit_base);
1024
1025         dst->sig_figs           = le32_to_cpu(src->sig_figs);
1026
1027         dst->latency_depth      = le32_to_cpu(src->latency_depth);
1028         dst->latency_target     = le64_to_cpu(src->latency_target);
1029         dst->latency_window     = le64_to_cpu(src->latency_window);
1030         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
1031
1032         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
1033         for (i = 0; i < dst->nr_block_infos; i++)
1034                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
1035
1036         dst->ss_dur             = le64_to_cpu(src->ss_dur);
1037         dst->ss_state           = le32_to_cpu(src->ss_state);
1038         dst->ss_head            = le32_to_cpu(src->ss_head);
1039         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
1040         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
1041         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
1042         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
1043
1044         if (dst->ss_state & FIO_SS_DATA) {
1045                 for (i = 0; i < dst->ss_dur; i++ ) {
1046                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
1047                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
1048                 }
1049         }
1050
1051         dst->cachehit           = le64_to_cpu(src->cachehit);
1052         dst->cachemiss          = le64_to_cpu(src->cachemiss);
1053 }
1054
1055 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
1056 {
1057         int i;
1058
1059         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1060                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
1061                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
1062                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
1063                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
1064                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
1065                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
1066         }
1067
1068         dst->kb_base    = le32_to_cpu(src->kb_base);
1069         dst->unit_base  = le32_to_cpu(src->unit_base);
1070         dst->sig_figs   = le32_to_cpu(src->sig_figs);
1071         dst->groupid    = le32_to_cpu(src->groupid);
1072         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
1073 }
1074
1075 static void json_object_add_client_info(struct json_object *obj,
1076                                         struct fio_client *client)
1077 {
1078         const char *hostname = client->hostname ? client->hostname : "";
1079
1080         json_object_add_value_string(obj, "hostname", hostname);
1081         json_object_add_value_int(obj, "port", client->port);
1082 }
1083
1084 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1085 {
1086         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1087         struct flist_head *opt_list = NULL;
1088         struct json_object *tsobj;
1089
1090         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1091                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1092
1093         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, &client->buf);
1094         client->did_stat = true;
1095         if (tsobj) {
1096                 json_object_add_client_info(tsobj, client);
1097                 json_array_add_value_object(clients_array, tsobj);
1098         }
1099
1100         if (sum_stat_clients <= 1)
1101                 return;
1102
1103         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr == 1);
1104         sum_group_stats(&client_gs, &p->rs);
1105
1106         client_ts.members++;
1107         client_ts.thread_number = p->ts.thread_number;
1108         client_ts.groupid = p->ts.groupid;
1109         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1110         client_ts.sig_figs = p->ts.sig_figs;
1111
1112         if (++sum_stat_nr == sum_stat_clients) {
1113                 strcpy(client_ts.name, "All clients");
1114                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, &allclients);
1115                 if (tsobj) {
1116                         json_object_add_client_info(tsobj, client);
1117                         json_array_add_value_object(clients_array, tsobj);
1118                 }
1119         }
1120 }
1121
1122 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1123 {
1124         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1125
1126         if (output_format & FIO_OUTPUT_NORMAL)
1127                 show_group_stats(gs, &client->buf);
1128 }
1129
1130 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1131 {
1132         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1133         struct print_option *p;
1134
1135         if (!job_opt_object)
1136                 return;
1137
1138         pdu->global = le16_to_cpu(pdu->global);
1139         pdu->truncated = le16_to_cpu(pdu->truncated);
1140         pdu->groupid = le32_to_cpu(pdu->groupid);
1141
1142         p = malloc(sizeof(*p));
1143         p->name = strdup((char *) pdu->name);
1144         if (pdu->value[0] != '\0')
1145                 p->value = strdup((char *) pdu->value);
1146         else
1147                 p->value = NULL;
1148
1149         if (pdu->global) {
1150                 const char *pos = "";
1151
1152                 if (p->value)
1153                         pos = p->value;
1154
1155                 json_object_add_value_string(job_opt_object, p->name, pos);
1156         } else if (client->opt_lists) {
1157                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1158
1159                 flist_add_tail(&p->list, opt_list);
1160         } else {
1161                 free(p->value);
1162                 free(p->name);
1163                 free(p);
1164         }
1165 }
1166
1167 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1168 {
1169         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1170         const char *buf = (const char *) pdu->buf;
1171         const char *name;
1172         int fio_unused ret;
1173         struct buf_output out;
1174
1175         buf_output_init(&out);
1176
1177         name = client->name ? client->name : client->hostname;
1178
1179         if (!client->skip_newline && !(output_format & FIO_OUTPUT_TERSE))
1180                 __log_buf(&out, "<%s> ", name);
1181         __log_buf(&out, "%s", buf);
1182         log_info_buf(out.buf, out.buflen);
1183         buf_output_free(&out);
1184         client->skip_newline = strchr(buf, '\n') == NULL;
1185 }
1186
1187 static void convert_agg(struct disk_util_agg *agg)
1188 {
1189         int i;
1190
1191         for (i = 0; i < 2; i++) {
1192                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1193                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1194                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1195                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1196         }
1197
1198         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1199         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1200         agg->slavecount         = le32_to_cpu(agg->slavecount);
1201         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1202 }
1203
1204 static void convert_dus(struct disk_util_stat *dus)
1205 {
1206         int i;
1207
1208         for (i = 0; i < 2; i++) {
1209                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1210                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1211                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1212                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1213         }
1214
1215         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1216         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1217         dus->s.msec             = le64_to_cpu(dus->s.msec);
1218 }
1219
1220 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1221 {
1222         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1223
1224         if (!client->disk_stats_shown)
1225                 client->disk_stats_shown = true;
1226
1227         if (output_format & FIO_OUTPUT_JSON) {
1228                 struct json_object *duobj;
1229
1230                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1231                 duobj = json_array_last_value_object(du_array);
1232                 json_object_add_client_info(duobj, client);
1233         }
1234         if (output_format & FIO_OUTPUT_NORMAL) {
1235                 __log_buf(&client->buf, "\nDisk stats (read/write):\n");
1236                 print_disk_util(&du->dus, &du->agg, 0, &client->buf);
1237         }
1238         if (output_format & FIO_OUTPUT_TERSE && terse_version >= 3) {
1239                 print_disk_util(&du->dus, &du->agg, 1, &client->buf);
1240                 __log_buf(&client->buf, "\n");
1241         }
1242 }
1243
1244 static void convert_jobs_eta(struct jobs_eta *je)
1245 {
1246         int i;
1247
1248         je->nr_running          = le32_to_cpu(je->nr_running);
1249         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1250         je->nr_pending          = le32_to_cpu(je->nr_pending);
1251         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1252         je->files_open          = le32_to_cpu(je->files_open);
1253
1254         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1255                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1256                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1257                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1258                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1259                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1260                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1261         }
1262
1263         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1264         je->eta_sec             = le64_to_cpu(je->eta_sec);
1265         je->nr_threads          = le32_to_cpu(je->nr_threads);
1266         je->is_pow2             = le32_to_cpu(je->is_pow2);
1267         je->unit_base           = le32_to_cpu(je->unit_base);
1268         je->sig_figs            = le32_to_cpu(je->sig_figs);
1269 }
1270
1271 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1272 {
1273         int i;
1274
1275         dst->nr_running         += je->nr_running;
1276         dst->nr_ramp            += je->nr_ramp;
1277         dst->nr_pending         += je->nr_pending;
1278         dst->nr_setting_up      += je->nr_setting_up;
1279         dst->files_open         += je->files_open;
1280
1281         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1282                 dst->m_rate[i]  += je->m_rate[i];
1283                 dst->t_rate[i]  += je->t_rate[i];
1284                 dst->m_iops[i]  += je->m_iops[i];
1285                 dst->t_iops[i]  += je->t_iops[i];
1286                 dst->rate[i]    += je->rate[i];
1287                 dst->iops[i]    += je->iops[i];
1288         }
1289
1290         dst->elapsed_sec        += je->elapsed_sec;
1291
1292         if (je->eta_sec > dst->eta_sec)
1293                 dst->eta_sec = je->eta_sec;
1294
1295         dst->nr_threads         += je->nr_threads;
1296
1297         /*
1298          * This wont be correct for multiple strings, but at least it
1299          * works for the basic cases.
1300          */
1301         strcpy((char *) dst->run_str, (char *) je->run_str);
1302 }
1303
1304 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1305 {
1306         struct fio_net_cmd_reply *reply = NULL;
1307         struct flist_head *entry;
1308
1309         flist_for_each(entry, &client->cmd_list) {
1310                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1311
1312                 if (cmd->tag == (uintptr_t) reply)
1313                         break;
1314
1315                 reply = NULL;
1316         }
1317
1318         if (!reply) {
1319                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1320                 return false;
1321         }
1322
1323         flist_del(&reply->list);
1324         cmd->tag = reply->saved_tag;
1325         free(reply);
1326         return true;
1327 }
1328
1329 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1330 {
1331         do {
1332                 struct fio_net_cmd_reply *reply = NULL;
1333                 struct flist_head *entry;
1334
1335                 flist_for_each(entry, &client->cmd_list) {
1336                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1337
1338                         if (tag == (uintptr_t) reply)
1339                                 break;
1340
1341                         reply = NULL;
1342                 }
1343
1344                 if (!reply)
1345                         break;
1346
1347                 usleep(1000);
1348         } while (1);
1349
1350         return 0;
1351 }
1352
1353 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1354 {
1355         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1356         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1357
1358         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1359
1360         assert(client->eta_in_flight == eta);
1361
1362         client->eta_in_flight = NULL;
1363         flist_del_init(&client->eta_list);
1364         client->eta_timeouts = 0;
1365
1366         if (client->ops->jobs_eta)
1367                 client->ops->jobs_eta(client, je);
1368
1369         fio_client_sum_jobs_eta(&eta->eta, je);
1370         fio_client_dec_jobs_eta(eta, client->ops->eta);
1371 }
1372
1373 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1374                                       uint64_t sample_size)
1375 {
1376         struct io_sample *s;
1377         int log_offset;
1378         uint64_t i, j, nr_samples;
1379         struct io_u_plat_entry *entry;
1380         uint64_t *io_u_plat;
1381
1382         int stride = 1 << hist_coarseness;
1383
1384         if (!sample_size)
1385                 return;
1386
1387         s = __get_sample(samples, 0, 0);
1388         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1389
1390         nr_samples = sample_size / __log_entry_sz(log_offset);
1391
1392         for (i = 0; i < nr_samples; i++) {
1393
1394                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1395                         i * sizeof(struct io_u_plat_entry));
1396
1397                 entry = s->data.plat_entry;
1398                 io_u_plat = entry->io_u_plat;
1399
1400                 fprintf(f, "%lu, %u, %llu, ", (unsigned long) s->time,
1401                                                 io_sample_ddir(s), (unsigned long long) s->bs);
1402                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1403                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1404                 }
1405                 fprintf(f, "%llu\n", (unsigned long long)
1406                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1407
1408         }
1409 }
1410
1411 static int fio_client_handle_iolog(struct fio_client *client,
1412                                    struct fio_net_cmd *cmd)
1413 {
1414         struct cmd_iolog_pdu *pdu = NULL;
1415         bool store_direct;
1416         char *log_pathname = NULL;
1417         int ret = 0;
1418
1419         pdu = convert_iolog(cmd, &store_direct);
1420         if (!pdu) {
1421                 log_err("fio: failed converting IO log\n");
1422                 ret = 1;
1423                 goto out;
1424         }
1425
1426         /* allocate buffer big enough for next sprintf() call */
1427         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1428                         strlen(client->hostname));
1429         if (!log_pathname) {
1430                 log_err("fio: memory allocation of unique pathname failed\n");
1431                 ret = -1;
1432                 goto out;
1433         }
1434         /* generate a unique pathname for the log file using hostname */
1435         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1436
1437         if (store_direct) {
1438                 ssize_t wrote;
1439                 size_t sz;
1440                 int fd;
1441
1442                 fd = open((const char *) log_pathname,
1443                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1444                 if (fd < 0) {
1445                         log_err("fio: open log %s: %s\n",
1446                                 log_pathname, strerror(errno));
1447                         ret = 1;
1448                         goto out;
1449                 }
1450
1451                 sz = cmd->pdu_len - sizeof(*pdu);
1452                 wrote = write(fd, pdu->samples, sz);
1453                 close(fd);
1454
1455                 if (wrote != sz) {
1456                         log_err("fio: short write on compressed log\n");
1457                         ret = 1;
1458                         goto out;
1459                 }
1460
1461                 ret = 0;
1462         } else {
1463                 FILE *f;
1464                 f = fopen((const char *) log_pathname, "w");
1465                 if (!f) {
1466                         log_err("fio: fopen log %s : %s\n",
1467                                 log_pathname, strerror(errno));
1468                         ret = 1;
1469                         goto out;
1470                 }
1471
1472                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1473                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1474                                            pdu->nr_samples * sizeof(struct io_sample));
1475                 } else {
1476                         flush_samples(f, pdu->samples,
1477                                         pdu->nr_samples * sizeof(struct io_sample));
1478                 }
1479                 fclose(f);
1480                 ret = 0;
1481         }
1482
1483 out:
1484         if (pdu && pdu != (void *) cmd->payload)
1485                 free(pdu);
1486
1487         if (log_pathname)
1488                 free(log_pathname);
1489
1490         return ret;
1491 }
1492
1493 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1494 {
1495         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1496         const char *os, *arch;
1497         char bit[16];
1498
1499         os = fio_get_os_string(probe->os);
1500         if (!os)
1501                 os = "unknown";
1502
1503         arch = fio_get_arch_string(probe->arch);
1504         if (!arch)
1505                 os = "unknown";
1506
1507         sprintf(bit, "%d-bit", probe->bpp * 8);
1508         probe->flags = le64_to_cpu(probe->flags);
1509
1510         if (output_format & FIO_OUTPUT_NORMAL) {
1511                 log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1512                         probe->hostname, probe->bigendian, bit, os, arch,
1513                         probe->fio_version, (unsigned long) probe->flags);
1514         }
1515
1516         if (!client->name)
1517                 client->name = strdup((char *) probe->hostname);
1518 }
1519
1520 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1521 {
1522         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1523
1524         client->state = Client_started;
1525         client->jobs = le32_to_cpu(pdu->jobs);
1526         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1527
1528         if (client->jobs) {
1529                 int i;
1530
1531                 if (client->opt_lists)
1532                         free(client->opt_lists);
1533
1534                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1535                 for (i = 0; i < client->jobs; i++)
1536                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1537         }
1538
1539         sum_stat_clients += client->nr_stat;
1540 }
1541
1542 static void handle_stop(struct fio_client *client)
1543 {
1544         if (client->error)
1545                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1546 }
1547
1548 static void convert_stop(struct fio_net_cmd *cmd)
1549 {
1550         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1551
1552         pdu->error = le32_to_cpu(pdu->error);
1553 }
1554
1555 static void convert_text(struct fio_net_cmd *cmd)
1556 {
1557         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1558
1559         pdu->level      = le32_to_cpu(pdu->level);
1560         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1561         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1562         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1563 }
1564
1565 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1566                                               struct cmd_iolog_pdu *pdu)
1567 {
1568 #ifdef CONFIG_ZLIB
1569         struct cmd_iolog_pdu *ret;
1570         z_stream stream;
1571         uint64_t nr_samples;
1572         size_t total;
1573         char *p;
1574
1575         stream.zalloc = Z_NULL;
1576         stream.zfree = Z_NULL;
1577         stream.opaque = Z_NULL;
1578         stream.avail_in = 0;
1579         stream.next_in = Z_NULL;
1580
1581         if (inflateInit(&stream) != Z_OK)
1582                 return NULL;
1583
1584         /*
1585          * Get header first, it's not compressed
1586          */
1587         nr_samples = le64_to_cpu(pdu->nr_samples);
1588
1589         if (pdu->log_type == IO_LOG_TYPE_HIST)
1590                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1591                                         sizeof(struct io_u_plat_entry));
1592         else
1593                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1594         ret = malloc(total + sizeof(*pdu));
1595         ret->nr_samples = nr_samples;
1596
1597         memcpy(ret, pdu, sizeof(*pdu));
1598
1599         p = (char *) ret + sizeof(*pdu);
1600
1601         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1602         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1603         while (stream.avail_in) {
1604                 unsigned int this_chunk = 65536;
1605                 unsigned int this_len;
1606                 int err;
1607
1608                 if (this_chunk > total)
1609                         this_chunk = total;
1610
1611                 stream.avail_out = this_chunk;
1612                 stream.next_out = (void *)p;
1613                 err = inflate(&stream, Z_NO_FLUSH);
1614                 /* may be Z_OK, or Z_STREAM_END */
1615                 if (err < 0) {
1616                         /*
1617                          * Z_STREAM_ERROR and Z_BUF_ERROR can safely be
1618                          * ignored */
1619                         if (err == Z_STREAM_ERROR || err == Z_BUF_ERROR)
1620                                 break;
1621                         log_err("fio: inflate error %d\n", err);
1622                         free(ret);
1623                         ret = NULL;
1624                         goto err;
1625                 }
1626
1627                 this_len = this_chunk - stream.avail_out;
1628                 p += this_len;
1629                 total -= this_len;
1630         }
1631
1632 err:
1633         inflateEnd(&stream);
1634         return ret;
1635 #else
1636         return NULL;
1637 #endif
1638 }
1639
1640 /*
1641  * This has been compressed on the server side, since it can be big.
1642  * Uncompress here.
1643  */
1644 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1645                                            bool *store_direct)
1646 {
1647         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1648         struct cmd_iolog_pdu *ret;
1649         uint64_t i;
1650         int compressed;
1651         void *samples;
1652
1653         *store_direct = false;
1654
1655         /*
1656          * Convert if compressed and we support it. If it's not
1657          * compressed, we need not do anything.
1658          */
1659         compressed = le32_to_cpu(pdu->compressed);
1660         if (compressed == XMIT_COMPRESSED) {
1661 #ifndef CONFIG_ZLIB
1662                 log_err("fio: server sent compressed data by mistake\n");
1663                 return NULL;
1664 #endif
1665                 ret = convert_iolog_gz(cmd, pdu);
1666                 if (!ret) {
1667                         log_err("fio: failed decompressing log\n");
1668                         return NULL;
1669                 }
1670         } else if (compressed == STORE_COMPRESSED) {
1671                 *store_direct = true;
1672                 ret = pdu;
1673         } else
1674                 ret = pdu;
1675
1676         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1677         ret->thread_number      = le32_to_cpu(ret->thread_number);
1678         ret->log_type           = le32_to_cpu(ret->log_type);
1679         ret->compressed         = le32_to_cpu(ret->compressed);
1680         ret->log_offset         = le32_to_cpu(ret->log_offset);
1681         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1682
1683         if (*store_direct)
1684                 return ret;
1685
1686         samples = &ret->samples[0];
1687         for (i = 0; i < ret->nr_samples; i++) {
1688                 struct io_sample *s;
1689
1690                 s = __get_sample(samples, ret->log_offset, i);
1691                 if (ret->log_type == IO_LOG_TYPE_HIST)
1692                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1693
1694                 s->time         = le64_to_cpu(s->time);
1695                 s->data.val     = le64_to_cpu(s->data.val);
1696                 s->__ddir       = le32_to_cpu(s->__ddir);
1697                 s->bs           = le64_to_cpu(s->bs);
1698
1699                 if (ret->log_offset) {
1700                         struct io_sample_offset *so = (void *) s;
1701
1702                         so->offset = le64_to_cpu(so->offset);
1703                 }
1704
1705                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1706                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1707                         s->data.plat_entry->list.next = NULL;
1708                         s->data.plat_entry->list.prev = NULL;
1709                 }
1710         }
1711
1712         return ret;
1713 }
1714
1715 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1716                            size_t size, uint64_t tag)
1717 {
1718         rep->error = cpu_to_le32(rep->error);
1719         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1720 }
1721
1722 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1723                          uint64_t tag)
1724 {
1725         struct cmd_sendfile_reply *rep;
1726         struct stat sb;
1727         size_t size;
1728         int fd;
1729
1730         size = sizeof(*rep);
1731         rep = malloc(size);
1732
1733         if (stat((char *)pdu->path, &sb) < 0) {
1734 fail:
1735                 rep->error = errno;
1736                 sendfile_reply(client->fd, rep, size, tag);
1737                 free(rep);
1738                 return 1;
1739         }
1740
1741         size += sb.st_size;
1742         rep = realloc(rep, size);
1743         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1744
1745         fd = open((char *)pdu->path, O_RDONLY);
1746         if (fd == -1 )
1747                 goto fail;
1748
1749         rep->error = read_data(fd, &rep->data, sb.st_size);
1750         sendfile_reply(client->fd, rep, size, tag);
1751         free(rep);
1752         close(fd);
1753         return 0;
1754 }
1755
1756 int fio_handle_client(struct fio_client *client)
1757 {
1758         struct client_ops *ops = client->ops;
1759         struct fio_net_cmd *cmd;
1760         int size;
1761
1762         dprint(FD_NET, "client: handle %s\n", client->hostname);
1763
1764         cmd = fio_net_recv_cmd(client->fd, true);
1765         if (!cmd)
1766                 return 0;
1767
1768         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1769                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1770
1771         client->last_cmd = cmd->opcode;
1772
1773         switch (cmd->opcode) {
1774         case FIO_NET_CMD_QUIT:
1775                 if (ops->quit)
1776                         ops->quit(client, cmd);
1777                 remove_client(client);
1778                 break;
1779         case FIO_NET_CMD_TEXT:
1780                 convert_text(cmd);
1781                 ops->text(client, cmd);
1782                 break;
1783         case FIO_NET_CMD_DU: {
1784                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1785
1786                 convert_dus(&du->dus);
1787                 convert_agg(&du->agg);
1788
1789                 ops->disk_util(client, cmd);
1790                 break;
1791                 }
1792         case FIO_NET_CMD_TS: {
1793                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1794
1795                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1796                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1797                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1798
1799                         size = le64_to_cpu(p->ts.ss_dur);
1800                         p->ts.ss_iops_data = (uint64_t *) ((struct cmd_ts_pdu *)cmd->payload + 1);
1801                         p->ts.ss_bw_data = p->ts.ss_iops_data + size;
1802                 }
1803
1804                 convert_ts(&p->ts, &p->ts);
1805                 convert_gs(&p->rs, &p->rs);
1806
1807                 ops->thread_status(client, cmd);
1808                 break;
1809                 }
1810         case FIO_NET_CMD_GS: {
1811                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1812
1813                 convert_gs(gs, gs);
1814
1815                 ops->group_stats(client, cmd);
1816                 break;
1817                 }
1818         case FIO_NET_CMD_ETA: {
1819                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1820
1821                 if (!remove_reply_cmd(client, cmd))
1822                         break;
1823                 convert_jobs_eta(je);
1824                 handle_eta(client, cmd);
1825                 break;
1826                 }
1827         case FIO_NET_CMD_PROBE:
1828                 remove_reply_cmd(client, cmd);
1829                 ops->probe(client, cmd);
1830                 break;
1831         case FIO_NET_CMD_SERVER_START:
1832                 client->state = Client_running;
1833                 if (ops->job_start)
1834                         ops->job_start(client, cmd);
1835                 break;
1836         case FIO_NET_CMD_START: {
1837                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1838
1839                 pdu->jobs = le32_to_cpu(pdu->jobs);
1840                 ops->start(client, cmd);
1841                 break;
1842                 }
1843         case FIO_NET_CMD_STOP: {
1844                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1845
1846                 convert_stop(cmd);
1847                 client->state = Client_stopped;
1848                 client->error = le32_to_cpu(pdu->error);
1849                 client->signal = le32_to_cpu(pdu->signal);
1850                 ops->stop(client);
1851                 break;
1852                 }
1853         case FIO_NET_CMD_ADD_JOB: {
1854                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1855
1856                 client->thread_number = le32_to_cpu(pdu->thread_number);
1857                 client->groupid = le32_to_cpu(pdu->groupid);
1858
1859                 if (ops->add_job)
1860                         ops->add_job(client, cmd);
1861                 break;
1862                 }
1863         case FIO_NET_CMD_IOLOG:
1864                 fio_client_handle_iolog(client, cmd);
1865                 break;
1866         case FIO_NET_CMD_UPDATE_JOB:
1867                 ops->update_job(client, cmd);
1868                 remove_reply_cmd(client, cmd);
1869                 break;
1870         case FIO_NET_CMD_VTRIGGER: {
1871                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1872                 char buf[128];
1873                 int off = 0;
1874
1875                 if (aux_path) {
1876                         strcpy(buf, aux_path);
1877                         off = strlen(buf);
1878                 }
1879
1880                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1881                 exec_trigger(trigger_cmd);
1882                 break;
1883                 }
1884         case FIO_NET_CMD_SENDFILE: {
1885                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1886                 fio_send_file(client, pdu, cmd->tag);
1887                 break;
1888                 }
1889         case FIO_NET_CMD_JOB_OPT: {
1890                 handle_job_opt(client, cmd);
1891                 break;
1892         }
1893         default:
1894                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1895                 break;
1896         }
1897
1898         free(cmd);
1899         return 1;
1900 }
1901
1902 int fio_clients_send_trigger(const char *cmd)
1903 {
1904         struct flist_head *entry;
1905         struct fio_client *client;
1906         size_t slen;
1907
1908         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1909
1910         if (!cmd)
1911                 slen = 0;
1912         else
1913                 slen = strlen(cmd);
1914
1915         flist_for_each(entry, &client_list) {
1916                 struct cmd_vtrigger_pdu *pdu;
1917
1918                 client = flist_entry(entry, struct fio_client, list);
1919
1920                 pdu = malloc(sizeof(*pdu) + slen);
1921                 pdu->len = cpu_to_le16((uint16_t) slen);
1922                 if (slen)
1923                         memcpy(pdu->cmd, cmd, slen);
1924                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1925                                         sizeof(*pdu) + slen, NULL, NULL);
1926                 free(pdu);
1927         }
1928
1929         return 0;
1930 }
1931
1932 static void request_client_etas(struct client_ops *ops)
1933 {
1934         struct fio_client *client;
1935         struct flist_head *entry;
1936         struct client_eta *eta;
1937         int skipped = 0;
1938
1939         if (eta_print == FIO_ETA_NEVER)
1940                 return;
1941
1942         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1943
1944         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1945         eta->pending = nr_clients;
1946
1947         flist_for_each(entry, &client_list) {
1948                 client = flist_entry(entry, struct fio_client, list);
1949
1950                 if (!flist_empty(&client->eta_list)) {
1951                         skipped++;
1952                         continue;
1953                 }
1954                 if (client->state != Client_running)
1955                         continue;
1956
1957                 assert(!client->eta_in_flight);
1958                 flist_add_tail(&client->eta_list, &eta_list);
1959                 client->eta_in_flight = eta;
1960                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1961                                         (uintptr_t) eta, &client->cmd_list);
1962         }
1963
1964         while (skipped--) {
1965                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1966                         break;
1967         }
1968
1969         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1970 }
1971
1972 /*
1973  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
1974  */
1975 static int handle_cmd_timeout(struct fio_client *client,
1976                               struct fio_net_cmd_reply *reply)
1977 {
1978         uint16_t reply_opcode = reply->opcode;
1979
1980         flist_del(&reply->list);
1981         free(reply);
1982
1983         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
1984                 return 1;
1985
1986         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
1987
1988         flist_del_init(&client->eta_list);
1989         if (client->eta_in_flight) {
1990                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
1991                 client->eta_in_flight = NULL;
1992         }
1993
1994         /*
1995          * If we fail 5 in a row, give up...
1996          */
1997         if (client->eta_timeouts++ > 5)
1998                 return 1;
1999
2000         return 0;
2001 }
2002
2003 static int client_check_cmd_timeout(struct fio_client *client,
2004                                     struct timespec *now)
2005 {
2006         struct fio_net_cmd_reply *reply;
2007         struct flist_head *entry, *tmp;
2008         int ret = 0;
2009
2010         flist_for_each_safe(entry, tmp, &client->cmd_list) {
2011                 unsigned int op;
2012
2013                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
2014
2015                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
2016                         continue;
2017
2018                 op = reply->opcode;
2019                 if (!handle_cmd_timeout(client, reply))
2020                         continue;
2021
2022                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
2023                                                 fio_server_op(op));
2024                 ret = 1;
2025         }
2026
2027         return flist_empty(&client->cmd_list) && ret;
2028 }
2029
2030 static int fio_check_clients_timed_out(void)
2031 {
2032         struct fio_client *client;
2033         struct flist_head *entry, *tmp;
2034         struct timespec ts;
2035         int ret = 0;
2036
2037         fio_gettime(&ts, NULL);
2038
2039         flist_for_each_safe(entry, tmp, &client_list) {
2040                 client = flist_entry(entry, struct fio_client, list);
2041
2042                 if (flist_empty(&client->cmd_list))
2043                         continue;
2044
2045                 if (!client_check_cmd_timeout(client, &ts))
2046                         continue;
2047
2048                 if (client->ops->timed_out)
2049                         client->ops->timed_out(client);
2050                 else
2051                         log_err("fio: client %s timed out\n", client->hostname);
2052
2053                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
2054                         client->error = ETIMEDOUT;
2055                 else
2056                         log_info("fio: ignoring timeout due to vtrigger\n");
2057                 remove_client(client);
2058                 ret = 1;
2059         }
2060
2061         return ret;
2062 }
2063
2064 int fio_handle_clients(struct client_ops *ops)
2065 {
2066         struct pollfd *pfds;
2067         int i, ret = 0, retval = 0;
2068
2069         fio_gettime(&eta_ts, NULL);
2070
2071         pfds = malloc(nr_clients * sizeof(struct pollfd));
2072
2073         init_thread_stat(&client_ts);
2074         init_group_run_stat(&client_gs);
2075
2076         while (!exit_backend && nr_clients) {
2077                 struct flist_head *entry, *tmp;
2078                 struct fio_client *client;
2079
2080                 i = 0;
2081                 flist_for_each_safe(entry, tmp, &client_list) {
2082                         client = flist_entry(entry, struct fio_client, list);
2083
2084                         if (!client->sent_job && !client->ops->stay_connected &&
2085                             flist_empty(&client->cmd_list)) {
2086                                 remove_client(client);
2087                                 continue;
2088                         }
2089
2090                         pfds[i].fd = client->fd;
2091                         pfds[i].events = POLLIN;
2092                         i++;
2093                 }
2094
2095                 if (!nr_clients)
2096                         break;
2097
2098                 assert(i == nr_clients);
2099
2100                 do {
2101                         struct timespec ts;
2102                         int timeout;
2103
2104                         fio_gettime(&ts, NULL);
2105                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2106                                 request_client_etas(ops);
2107                                 memcpy(&eta_ts, &ts, sizeof(ts));
2108
2109                                 if (fio_check_clients_timed_out())
2110                                         break;
2111                         }
2112
2113                         check_trigger_file();
2114
2115                         timeout = min(100u, ops->eta_msec);
2116
2117                         ret = poll(pfds, nr_clients, timeout);
2118                         if (ret < 0) {
2119                                 if (errno == EINTR)
2120                                         continue;
2121                                 log_err("fio: poll clients: %s\n", strerror(errno));
2122                                 break;
2123                         } else if (!ret)
2124                                 continue;
2125                 } while (ret <= 0);
2126
2127                 for (i = 0; i < nr_clients; i++) {
2128                         if (!(pfds[i].revents & POLLIN))
2129                                 continue;
2130
2131                         client = find_client_by_fd(pfds[i].fd);
2132                         if (!client) {
2133                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2134                                 continue;
2135                         }
2136                         if (!fio_handle_client(client)) {
2137                                 log_info("client: host=%s disconnected\n",
2138                                                 client->hostname);
2139                                 remove_client(client);
2140                                 retval = 1;
2141                         } else if (client->error)
2142                                 retval = 1;
2143                         fio_put_client(client);
2144                 }
2145         }
2146
2147         log_info_buf(allclients.buf, allclients.buflen);
2148         buf_output_free(&allclients);
2149
2150         fio_client_json_fini();
2151
2152         free(pfds);
2153         return retval || error_clients;
2154 }
2155
2156 static void client_display_thread_status(struct jobs_eta *je)
2157 {
2158         if (!(output_format & FIO_OUTPUT_JSON))
2159                 display_thread_status(je);
2160 }