client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <poll.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <sys/socket.h>
  10 #include <sys/un.h>
  11 #include <netinet/in.h>
  12 #include <arpa/inet.h>
  13 #include <netdb.h>
  14 #include <signal.h>
  15 #ifdef CONFIG_ZLIB
  16 #include <zlib.h>
  17 #endif
  18
  19 #include "fio.h"
  20 #include "client.h"
  21 #include "server.h"
  22 #include "flist.h"
  23 #include "hash.h"
  24 #include "verify-state.h"
  25
  26 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  31 static void handle_stop(struct fio_client *client);
  32 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  33
  34 static void convert_text(struct fio_net_cmd *cmd);
  35 static void client_display_thread_status(struct jobs_eta *je);
  36
  37 struct client_ops fio_client_ops = {
  38         .text           = handle_text,
  39         .disk_util      = handle_du,
  40         .thread_status  = handle_ts,
  41         .group_stats    = handle_gs,
  42         .stop           = handle_stop,
  43         .start          = handle_start,
  44         .eta            = client_display_thread_status,
  45         .probe          = handle_probe,
  46         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  47         .client_type    = FIO_CLIENT_TYPE_CLI,
  48 };
  49
  50 static struct timespec eta_ts;
  51
  52 static FLIST_HEAD(client_list);
  53 static FLIST_HEAD(eta_list);
  54
  55 static FLIST_HEAD(arg_list);
  56
  57 struct thread_stat client_ts;
  58 struct group_run_stats client_gs;
  59 int sum_stat_clients;
  60
  61 static int sum_stat_nr;
  62 static struct json_object *root = NULL;
  63 static struct json_object *job_opt_object = NULL;
  64 static struct json_array *clients_array = NULL;
  65 static struct json_array *du_array = NULL;
  66
  67 static int error_clients;
  68
  69 #define FIO_CLIENT_HASH_BITS    7
  70 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  71 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  72 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  73
  74 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *, bool *);
  75
  76 static void fio_client_add_hash(struct fio_client *client)
  77 {
  78         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  79
  80         bucket &= FIO_CLIENT_HASH_MASK;
  81         flist_add(&client->hash_list, &client_hash[bucket]);
  82 }
  83
  84 static void fio_client_remove_hash(struct fio_client *client)
  85 {
  86         if (!flist_empty(&client->hash_list))
  87                 flist_del_init(&client->hash_list);
  88 }
  89
  90 static void fio_init fio_client_hash_init(void)
  91 {
  92         int i;
  93
  94         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  95                 INIT_FLIST_HEAD(&client_hash[i]);
  96 }
  97
  98 static int read_data(int fd, void *data, size_t size)
  99 {
 100         ssize_t ret;
 101
 102         while (size) {
 103                 ret = read(fd, data, size);
 104                 if (ret < 0) {
 105                         if (errno == EAGAIN || errno == EINTR)
 106                                 continue;
 107                         break;
 108                 } else if (!ret)
 109                         break;
 110                 else {
 111                         data += ret;
 112                         size -= ret;
 113                 }
 114         }
 115
 116         if (size)
 117                 return EAGAIN;
 118
 119         return 0;
 120 }
 121
 122 static int read_ini_data(int fd, void *data, size_t size)
 123 {
 124         char *p = data;
 125         int ret = 0;
 126         FILE *fp;
 127         int dupfd;
 128
 129         dupfd = dup(fd);
 130         if (dupfd < 0)
 131                 return errno;
 132
 133         fp = fdopen(dupfd, "r");
 134         if (!fp) {
 135                 ret = errno;
 136                 close(dupfd);
 137                 goto out;
 138         }
 139
 140         while (1) {
 141                 ssize_t len;
 142                 char buf[OPT_LEN_MAX+1], *sub;
 143
 144                 if (!fgets(buf, sizeof(buf), fp)) {
 145                         if (ferror(fp)) {
 146                                 if (errno == EAGAIN || errno == EINTR)
 147                                         continue;
 148                                 ret = errno;
 149                         }
 150                         break;
 151                 }
 152
 153                 sub = fio_option_dup_subs(buf);
 154                 len = strlen(sub);
 155                 if (len + 1 > size) {
 156                         log_err("fio: no space left to read data\n");
 157                         free(sub);
 158                         ret = ENOSPC;
 159                         break;
 160                 }
 161
 162                 memcpy(p, sub, len);
 163                 free(sub);
 164                 p += len;
 165                 *p = '\0';
 166                 size -= len;
 167         }
 168
 169         fclose(fp);
 170 out:
 171         return ret;
 172 }
 173
 174 static void fio_client_json_init(void)
 175 {
 176         char time_buf[32];
 177         time_t time_p;
 178
 179         if (!(output_format & FIO_OUTPUT_JSON))
 180                 return;
 181
 182         time(&time_p);
 183         os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
 184         time_buf[strlen(time_buf) - 1] = '\0';
 185
 186         root = json_create_object();
 187         json_object_add_value_string(root, "fio version", fio_version_string);
 188         json_object_add_value_int(root, "timestamp", time_p);
 189         json_object_add_value_string(root, "time", time_buf);
 190
 191         job_opt_object = json_create_object();
 192         json_object_add_value_object(root, "global options", job_opt_object);
 193         clients_array = json_create_array();
 194         json_object_add_value_array(root, "client_stats", clients_array);
 195         du_array = json_create_array();
 196         json_object_add_value_array(root, "disk_util", du_array);
 197 }
 198
 199 static void fio_client_json_fini(void)
 200 {
 201         struct buf_output out;
 202
 203         if (!(output_format & FIO_OUTPUT_JSON))
 204                 return;
 205
 206         buf_output_init(&out);
 207         __log_buf(&out, "\n");
 208         json_print_object(root, &out);
 209         __log_buf(&out, "\n");
 210         log_info_buf(out.buf, out.buflen);
 211         buf_output_free(&out);
 212         json_free_object(root);
 213         root = NULL;
 214         clients_array = NULL;
 215         du_array = NULL;
 216 }
 217
 218 static struct fio_client *find_client_by_fd(int fd)
 219 {
 220         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 221         struct fio_client *client;
 222         struct flist_head *entry;
 223
 224         flist_for_each(entry, &client_hash[bucket]) {
 225                 client = flist_entry(entry, struct fio_client, hash_list);
 226
 227                 if (client->fd == fd) {
 228                         client->refs++;
 229                         return client;
 230                 }
 231         }
 232
 233         return NULL;
 234 }
 235
 236 void fio_put_client(struct fio_client *client)
 237 {
 238         if (--client->refs)
 239                 return;
 240
 241         free(client->hostname);
 242         if (client->argv)
 243                 free(client->argv);
 244         if (client->name)
 245                 free(client->name);
 246         while (client->nr_files) {
 247                 struct client_file *cf = &client->files[--client->nr_files];
 248
 249                 free(cf->file);
 250         }
 251         if (client->files)
 252                 free(client->files);
 253         if (client->opt_lists)
 254                 free(client->opt_lists);
 255
 256         if (!client->did_stat)
 257                 sum_stat_clients--;
 258
 259         if (client->error)
 260                 error_clients++;
 261
 262         free(client);
 263 }
 264
 265 static int fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 266 {
 267         if (!--eta->pending) {
 268                 eta_fn(&eta->eta);
 269                 free(eta);
 270                 return 0;
 271         }
 272
 273         return 1;
 274 }
 275
 276 static void fio_drain_client_text(struct fio_client *client)
 277 {
 278         do {
 279                 struct fio_net_cmd *cmd;
 280
 281                 cmd = fio_net_recv_cmd(client->fd, false);
 282                 if (!cmd)
 283                         break;
 284
 285                 if (cmd->opcode == FIO_NET_CMD_TEXT) {
 286                         convert_text(cmd);
 287                         client->ops->text(client, cmd);
 288                 }
 289
 290                 free(cmd);
 291         } while (1);
 292 }
 293
 294 static void remove_client(struct fio_client *client)
 295 {
 296         assert(client->refs);
 297
 298         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 299
 300         fio_drain_client_text(client);
 301
 302         if (!flist_empty(&client->list))
 303                 flist_del_init(&client->list);
 304
 305         fio_client_remove_hash(client);
 306
 307         if (!flist_empty(&client->eta_list)) {
 308                 flist_del_init(&client->eta_list);
 309                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 310         }
 311
 312         close(client->fd);
 313         client->fd = -1;
 314
 315         if (client->ops->removed)
 316                 client->ops->removed(client);
 317
 318         nr_clients--;
 319         fio_put_client(client);
 320 }
 321
 322 struct fio_client *fio_get_client(struct fio_client *client)
 323 {
 324         client->refs++;
 325         return client;
 326 }
 327
 328 static void __fio_client_add_cmd_option(struct fio_client *client,
 329                                         const char *opt)
 330 {
 331         int index;
 332
 333         index = client->argc++;
 334         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 335         client->argv[index] = strdup(opt);
 336         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 337 }
 338
 339 void fio_client_add_cmd_option(void *cookie, const char *opt)
 340 {
 341         struct fio_client *client = cookie;
 342         struct flist_head *entry;
 343
 344         if (!client || !opt)
 345                 return;
 346
 347         __fio_client_add_cmd_option(client, opt);
 348
 349         /*
 350          * Duplicate arguments to shared client group
 351          */
 352         flist_for_each(entry, &arg_list) {
 353                 client = flist_entry(entry, struct fio_client, arg_list);
 354
 355                 __fio_client_add_cmd_option(client, opt);
 356         }
 357 }
 358
 359 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 360                                            const char *hostname, int type,
 361                                            int port)
 362 {
 363         struct fio_client *client;
 364
 365         client = malloc(sizeof(*client));
 366         memset(client, 0, sizeof(*client));
 367
 368         INIT_FLIST_HEAD(&client->list);
 369         INIT_FLIST_HEAD(&client->hash_list);
 370         INIT_FLIST_HEAD(&client->arg_list);
 371         INIT_FLIST_HEAD(&client->eta_list);
 372         INIT_FLIST_HEAD(&client->cmd_list);
 373
 374         client->hostname = strdup(hostname);
 375
 376         if (type == Fio_client_socket)
 377                 client->is_sock = true;
 378         else {
 379                 int ipv6;
 380
 381                 ipv6 = type == Fio_client_ipv6;
 382                 if (fio_server_parse_host(hostname, ipv6,
 383                                                 &client->addr.sin_addr,
 384                                                 &client->addr6.sin6_addr))
 385                         goto err;
 386
 387                 client->port = port;
 388         }
 389
 390         client->fd = -1;
 391         client->ops = ops;
 392         client->refs = 1;
 393         client->type = ops->client_type;
 394
 395         __fio_client_add_cmd_option(client, "fio");
 396
 397         flist_add(&client->list, &client_list);
 398         nr_clients++;
 399         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 400         return client;
 401 err:
 402         free(client);
 403         return NULL;
 404 }
 405
 406 int fio_client_add_ini_file(void *cookie, const char *ini_file, bool remote)
 407 {
 408         struct fio_client *client = cookie;
 409         struct client_file *cf;
 410         size_t new_size;
 411         void *new_files;
 412
 413         if (!client)
 414                 return 1;
 415
 416         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 417
 418         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 419         new_files = realloc(client->files, new_size);
 420         if (!new_files)
 421                 return 1;
 422
 423         client->files = new_files;
 424         cf = &client->files[client->nr_files];
 425         cf->file = strdup(ini_file);
 426         cf->remote = remote;
 427         client->nr_files++;
 428         return 0;
 429 }
 430
 431 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 432 {
 433         struct fio_client *existing = *cookie;
 434         struct fio_client *client;
 435
 436         if (existing) {
 437                 /*
 438                  * We always add our "exec" name as the option, hence 1
 439                  * means empty.
 440                  */
 441                 if (existing->argc == 1)
 442                         flist_add_tail(&existing->arg_list, &arg_list);
 443                 else {
 444                         while (!flist_empty(&arg_list))
 445                                 flist_del_init(arg_list.next);
 446                 }
 447         }
 448
 449         client = malloc(sizeof(*client));
 450         memset(client, 0, sizeof(*client));
 451
 452         INIT_FLIST_HEAD(&client->list);
 453         INIT_FLIST_HEAD(&client->hash_list);
 454         INIT_FLIST_HEAD(&client->arg_list);
 455         INIT_FLIST_HEAD(&client->eta_list);
 456         INIT_FLIST_HEAD(&client->cmd_list);
 457
 458         if (fio_server_parse_string(hostname, &client->hostname,
 459                                         &client->is_sock, &client->port,
 460                                         &client->addr.sin_addr,
 461                                         &client->addr6.sin6_addr,
 462                                         &client->ipv6))
 463                 return -1;
 464
 465         client->fd = -1;
 466         client->ops = ops;
 467         client->refs = 1;
 468         client->type = ops->client_type;
 469
 470         __fio_client_add_cmd_option(client, "fio");
 471
 472         flist_add(&client->list, &client_list);
 473         nr_clients++;
 474         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 475         *cookie = client;
 476         return 0;
 477 }
 478
 479 static const char *server_name(struct fio_client *client, char *buf,
 480                                size_t bufsize)
 481 {
 482         const char *from;
 483
 484         if (client->ipv6)
 485                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 486         else if (client->is_sock)
 487                 from = "sock";
 488         else
 489                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 490
 491         return from;
 492 }
 493
 494 static void probe_client(struct fio_client *client)
 495 {
 496         struct cmd_client_probe_pdu pdu;
 497         const char *sname;
 498         uint64_t tag;
 499         char buf[64];
 500
 501         dprint(FD_NET, "client: send probe\n");
 502
 503 #ifdef CONFIG_ZLIB
 504         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 505 #else
 506         pdu.flags = 0;
 507 #endif
 508
 509         sname = server_name(client, buf, sizeof(buf));
 510         memset(pdu.server, 0, sizeof(pdu.server));
 511         strncpy((char *) pdu.server, sname, sizeof(pdu.server) - 1);
 512
 513         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 514 }
 515
 516 static int fio_client_connect_ip(struct fio_client *client)
 517 {
 518         struct sockaddr *addr;
 519         socklen_t socklen;
 520         int fd, domain;
 521
 522         if (client->ipv6) {
 523                 client->addr6.sin6_family = AF_INET6;
 524                 client->addr6.sin6_port = htons(client->port);
 525                 domain = AF_INET6;
 526                 addr = (struct sockaddr *) &client->addr6;
 527                 socklen = sizeof(client->addr6);
 528         } else {
 529                 client->addr.sin_family = AF_INET;
 530                 client->addr.sin_port = htons(client->port);
 531                 domain = AF_INET;
 532                 addr = (struct sockaddr *) &client->addr;
 533                 socklen = sizeof(client->addr);
 534         }
 535
 536         fd = socket(domain, SOCK_STREAM, 0);
 537         if (fd < 0) {
 538                 int ret = -errno;
 539
 540                 log_err("fio: socket: %s\n", strerror(errno));
 541                 return ret;
 542         }
 543
 544         if (connect(fd, addr, socklen) < 0) {
 545                 int ret = -errno;
 546
 547                 log_err("fio: connect: %s\n", strerror(errno));
 548                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 549                                                                 client->port);
 550                 close(fd);
 551                 return ret;
 552         }
 553
 554         return fd;
 555 }
 556
 557 static int fio_client_connect_sock(struct fio_client *client)
 558 {
 559         struct sockaddr_un *addr = &client->addr_un;
 560         socklen_t len;
 561         int fd;
 562
 563         memset(addr, 0, sizeof(*addr));
 564         addr->sun_family = AF_UNIX;
 565         strncpy(addr->sun_path, client->hostname, sizeof(addr->sun_path) - 1);
 566
 567         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 568         if (fd < 0) {
 569                 int ret = -errno;
 570
 571                 log_err("fio: socket: %s\n", strerror(errno));
 572                 return ret;
 573         }
 574
 575         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 576         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 577                 int ret = -errno;
 578
 579                 log_err("fio: connect; %s\n", strerror(errno));
 580                 close(fd);
 581                 return ret;
 582         }
 583
 584         return fd;
 585 }
 586
 587 int fio_client_connect(struct fio_client *client)
 588 {
 589         int fd;
 590
 591         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 592
 593         if (client->is_sock)
 594                 fd = fio_client_connect_sock(client);
 595         else
 596                 fd = fio_client_connect_ip(client);
 597
 598         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 599
 600         if (fd < 0)
 601                 return fd;
 602
 603         client->fd = fd;
 604         fio_client_add_hash(client);
 605         client->state = Client_connected;
 606
 607         probe_client(client);
 608         return 0;
 609 }
 610
 611 int fio_client_terminate(struct fio_client *client)
 612 {
 613         return fio_net_send_quit(client->fd);
 614 }
 615
 616 static void fio_clients_terminate(void)
 617 {
 618         struct flist_head *entry;
 619         struct fio_client *client;
 620
 621         dprint(FD_NET, "client: terminate clients\n");
 622
 623         flist_for_each(entry, &client_list) {
 624                 client = flist_entry(entry, struct fio_client, list);
 625                 fio_client_terminate(client);
 626         }
 627 }
 628
 629 static void sig_int(int sig)
 630 {
 631         dprint(FD_NET, "client: got signal %d\n", sig);
 632         fio_clients_terminate();
 633 }
 634
 635 static void client_signal_handler(void)
 636 {
 637         struct sigaction act;
 638
 639         memset(&act, 0, sizeof(act));
 640         act.sa_handler = sig_int;
 641         act.sa_flags = SA_RESTART;
 642         sigaction(SIGINT, &act, NULL);
 643
 644         memset(&act, 0, sizeof(act));
 645         act.sa_handler = sig_int;
 646         act.sa_flags = SA_RESTART;
 647         sigaction(SIGTERM, &act, NULL);
 648
 649 /* Windows uses SIGBREAK as a quit signal from other applications */
 650 #ifdef WIN32
 651         memset(&act, 0, sizeof(act));
 652         act.sa_handler = sig_int;
 653         act.sa_flags = SA_RESTART;
 654         sigaction(SIGBREAK, &act, NULL);
 655 #endif
 656
 657         memset(&act, 0, sizeof(act));
 658         act.sa_handler = sig_show_status;
 659         act.sa_flags = SA_RESTART;
 660         sigaction(SIGUSR1, &act, NULL);
 661 }
 662
 663 static int send_client_cmd_line(struct fio_client *client)
 664 {
 665         struct cmd_single_line_pdu *cslp;
 666         struct cmd_line_pdu *clp;
 667         unsigned long offset;
 668         unsigned int *lens;
 669         void *pdu;
 670         size_t mem;
 671         int i, ret;
 672
 673         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 674
 675         lens = malloc(client->argc * sizeof(unsigned int));
 676
 677         /*
 678          * Find out how much mem we need
 679          */
 680         for (i = 0, mem = 0; i < client->argc; i++) {
 681                 lens[i] = strlen(client->argv[i]) + 1;
 682                 mem += lens[i];
 683         }
 684
 685         /*
 686          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 687          */
 688         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 689
 690         pdu = malloc(mem);
 691         clp = pdu;
 692         offset = sizeof(*clp);
 693
 694         for (i = 0; i < client->argc; i++) {
 695                 uint16_t arg_len = lens[i];
 696
 697                 cslp = pdu + offset;
 698                 strcpy((char *) cslp->text, client->argv[i]);
 699                 cslp->len = cpu_to_le16(arg_len);
 700                 offset += sizeof(*cslp) + arg_len;
 701         }
 702
 703         free(lens);
 704         clp->lines = cpu_to_le16(client->argc);
 705         clp->client_type = __cpu_to_le16(client->type);
 706         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 707         free(pdu);
 708         return ret;
 709 }
 710
 711 int fio_clients_connect(void)
 712 {
 713         struct fio_client *client;
 714         struct flist_head *entry, *tmp;
 715         int ret;
 716
 717 #ifdef WIN32
 718         WSADATA wsd;
 719         WSAStartup(MAKEWORD(2, 2), &wsd);
 720 #endif
 721
 722         dprint(FD_NET, "client: connect all\n");
 723
 724         client_signal_handler();
 725
 726         flist_for_each_safe(entry, tmp, &client_list) {
 727                 client = flist_entry(entry, struct fio_client, list);
 728
 729                 ret = fio_client_connect(client);
 730                 if (ret) {
 731                         remove_client(client);
 732                         continue;
 733                 }
 734
 735                 if (client->argc > 1)
 736                         send_client_cmd_line(client);
 737         }
 738
 739         return !nr_clients;
 740 }
 741
 742 int fio_start_client(struct fio_client *client)
 743 {
 744         dprint(FD_NET, "client: start %s\n", client->hostname);
 745         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 746 }
 747
 748 int fio_start_all_clients(void)
 749 {
 750         struct fio_client *client;
 751         struct flist_head *entry, *tmp;
 752         int ret;
 753
 754         dprint(FD_NET, "client: start all\n");
 755
 756         fio_client_json_init();
 757
 758         flist_for_each_safe(entry, tmp, &client_list) {
 759                 client = flist_entry(entry, struct fio_client, list);
 760
 761                 ret = fio_start_client(client);
 762                 if (ret) {
 763                         remove_client(client);
 764                         continue;
 765                 }
 766         }
 767
 768         return flist_empty(&client_list);
 769 }
 770
 771 static int __fio_client_send_remote_ini(struct fio_client *client,
 772                                         const char *filename)
 773 {
 774         struct cmd_load_file_pdu *pdu;
 775         size_t p_size;
 776         int ret;
 777
 778         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 779
 780         p_size = sizeof(*pdu) + strlen(filename) + 1;
 781         pdu = malloc(p_size);
 782         memset(pdu, 0, p_size);
 783         pdu->name_len = strlen(filename);
 784         strcpy((char *) pdu->file, filename);
 785         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 786
 787         client->sent_job = true;
 788         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 789         free(pdu);
 790         return ret;
 791 }
 792
 793 /*
 794  * Send file contents to server backend. We could use sendfile(), but to remain
 795  * more portable lets just read/write the darn thing.
 796  */
 797 static int __fio_client_send_local_ini(struct fio_client *client,
 798                                        const char *filename)
 799 {
 800         struct cmd_job_pdu *pdu;
 801         size_t p_size;
 802         struct stat sb;
 803         char *p;
 804         void *buf;
 805         off_t len;
 806         int fd, ret;
 807
 808         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 809
 810         fd = open(filename, O_RDONLY);
 811         if (fd < 0) {
 812                 ret = -errno;
 813                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 814                 return ret;
 815         }
 816
 817         if (fstat(fd, &sb) < 0) {
 818                 ret = -errno;
 819                 log_err("fio: job file stat: %s\n", strerror(errno));
 820                 close(fd);
 821                 return ret;
 822         }
 823
 824         /*
 825          * Add extra space for variable expansion, but doesn't guarantee.
 826          */
 827         sb.st_size += OPT_LEN_MAX;
 828         p_size = sb.st_size + sizeof(*pdu);
 829         pdu = malloc(p_size);
 830         buf = pdu->buf;
 831
 832         len = sb.st_size;
 833         p = buf;
 834         if (read_ini_data(fd, p, len)) {
 835                 log_err("fio: failed reading job file %s\n", filename);
 836                 close(fd);
 837                 free(pdu);
 838                 return 1;
 839         }
 840
 841         pdu->buf_len = __cpu_to_le32(sb.st_size);
 842         pdu->client_type = cpu_to_le32(client->type);
 843
 844         client->sent_job = true;
 845         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 846         free(pdu);
 847         close(fd);
 848         return ret;
 849 }
 850
 851 int fio_client_send_ini(struct fio_client *client, const char *filename,
 852                         bool remote)
 853 {
 854         int ret;
 855
 856         if (!remote)
 857                 ret = __fio_client_send_local_ini(client, filename);
 858         else
 859                 ret = __fio_client_send_remote_ini(client, filename);
 860
 861         if (!ret)
 862                 client->sent_job = true;
 863
 864         return ret;
 865 }
 866
 867 static int fio_client_send_cf(struct fio_client *client,
 868                               struct client_file *cf)
 869 {
 870         return fio_client_send_ini(client, cf->file, cf->remote);
 871 }
 872
 873 int fio_clients_send_ini(const char *filename)
 874 {
 875         struct fio_client *client;
 876         struct flist_head *entry, *tmp;
 877
 878         flist_for_each_safe(entry, tmp, &client_list) {
 879                 bool failed = false;
 880
 881                 client = flist_entry(entry, struct fio_client, list);
 882
 883                 if (client->nr_files) {
 884                         int i;
 885
 886                         for (i = 0; i < client->nr_files; i++) {
 887                                 struct client_file *cf;
 888
 889                                 cf = &client->files[i];
 890
 891                                 if (fio_client_send_cf(client, cf)) {
 892                                         failed = true;
 893                                         remove_client(client);
 894                                         break;
 895                                 }
 896                         }
 897                 }
 898                 if (client->sent_job || failed)
 899                         continue;
 900                 if (!filename || fio_client_send_ini(client, filename, 0))
 901                         remove_client(client);
 902         }
 903
 904         return !nr_clients;
 905 }
 906
 907 int fio_client_update_options(struct fio_client *client,
 908                               struct thread_options *o, uint64_t *tag)
 909 {
 910         struct cmd_add_job_pdu pdu;
 911
 912         pdu.thread_number = cpu_to_le32(client->thread_number);
 913         pdu.groupid = cpu_to_le32(client->groupid);
 914         convert_thread_options_to_net(&pdu.top, o);
 915
 916         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 917 }
 918
 919 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 920 {
 921         dst->max_val    = le64_to_cpu(src->max_val);
 922         dst->min_val    = le64_to_cpu(src->min_val);
 923         dst->samples    = le64_to_cpu(src->samples);
 924
 925         /*
 926          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 927          */
 928         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 929         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 930 }
 931
 932 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 933 {
 934         int i, j;
 935
 936         dst->error              = le32_to_cpu(src->error);
 937         dst->thread_number      = le32_to_cpu(src->thread_number);
 938         dst->groupid            = le32_to_cpu(src->groupid);
 939         dst->pid                = le32_to_cpu(src->pid);
 940         dst->members            = le32_to_cpu(src->members);
 941         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 942
 943         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 944                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 945                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 946                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 947                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 948                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 949         }
 950
 951         dst->usr_time           = le64_to_cpu(src->usr_time);
 952         dst->sys_time           = le64_to_cpu(src->sys_time);
 953         dst->ctx                = le64_to_cpu(src->ctx);
 954         dst->minf               = le64_to_cpu(src->minf);
 955         dst->majf               = le64_to_cpu(src->majf);
 956         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 957         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 958         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 959
 960         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 961                 fio_fp64_t *fps = &src->percentile_list[i];
 962                 fio_fp64_t *fpd = &dst->percentile_list[i];
 963
 964                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 965         }
 966
 967         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 968                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 969                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 970                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 971         }
 972
 973         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 974                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
 975         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 976                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
 977         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 978                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
 979
 980         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 981                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 982                         dst->io_u_plat[i][j] = le64_to_cpu(src->io_u_plat[i][j]);
 983
 984         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 985                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 986                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 987                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
 988         }
 989
 990         dst->total_submit       = le64_to_cpu(src->total_submit);
 991         dst->total_complete     = le64_to_cpu(src->total_complete);
 992
 993         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 994                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 995                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 996         }
 997
 998         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 999         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
1000         dst->total_err_count    = le64_to_cpu(src->total_err_count);
1001         dst->first_error        = le32_to_cpu(src->first_error);
1002         dst->kb_base            = le32_to_cpu(src->kb_base);
1003         dst->unit_base          = le32_to_cpu(src->unit_base);
1004
1005         dst->sig_figs           = le32_to_cpu(src->sig_figs);
1006
1007         dst->latency_depth      = le32_to_cpu(src->latency_depth);
1008         dst->latency_target     = le64_to_cpu(src->latency_target);
1009         dst->latency_window     = le64_to_cpu(src->latency_window);
1010         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
1011
1012         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
1013         for (i = 0; i < dst->nr_block_infos; i++)
1014                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
1015
1016         dst->ss_dur             = le64_to_cpu(src->ss_dur);
1017         dst->ss_state           = le32_to_cpu(src->ss_state);
1018         dst->ss_head            = le32_to_cpu(src->ss_head);
1019         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
1020         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
1021         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
1022         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
1023
1024         if (dst->ss_state & FIO_SS_DATA) {
1025                 for (i = 0; i < dst->ss_dur; i++ ) {
1026                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
1027                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
1028                 }
1029         }
1030 }
1031
1032 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
1033 {
1034         int i;
1035
1036         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1037                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
1038                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
1039                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
1040                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
1041                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
1042                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
1043         }
1044
1045         dst->kb_base    = le32_to_cpu(src->kb_base);
1046         dst->unit_base  = le32_to_cpu(src->unit_base);
1047         dst->sig_figs   = le32_to_cpu(src->sig_figs);
1048         dst->groupid    = le32_to_cpu(src->groupid);
1049         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
1050 }
1051
1052 static void json_object_add_client_info(struct json_object *obj,
1053                                         struct fio_client *client)
1054 {
1055         const char *hostname = client->hostname ? client->hostname : "";
1056
1057         json_object_add_value_string(obj, "hostname", hostname);
1058         json_object_add_value_int(obj, "port", client->port);
1059 }
1060
1061 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1062 {
1063         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1064         struct flist_head *opt_list = NULL;
1065         struct json_object *tsobj;
1066
1067         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1068                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1069
1070         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, NULL);
1071         client->did_stat = true;
1072         if (tsobj) {
1073                 json_object_add_client_info(tsobj, client);
1074                 json_array_add_value_object(clients_array, tsobj);
1075         }
1076
1077         if (sum_stat_clients <= 1)
1078                 return;
1079
1080         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr == 1);
1081         sum_group_stats(&client_gs, &p->rs);
1082
1083         client_ts.members++;
1084         client_ts.thread_number = p->ts.thread_number;
1085         client_ts.groupid = p->ts.groupid;
1086         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1087         client_ts.sig_figs = p->ts.sig_figs;
1088
1089         if (++sum_stat_nr == sum_stat_clients) {
1090                 strcpy(client_ts.name, "All clients");
1091                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, NULL);
1092                 if (tsobj) {
1093                         json_object_add_client_info(tsobj, client);
1094                         json_array_add_value_object(clients_array, tsobj);
1095                 }
1096         }
1097 }
1098
1099 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1100 {
1101         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1102
1103         if (output_format & FIO_OUTPUT_NORMAL)
1104                 show_group_stats(gs, NULL);
1105 }
1106
1107 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1108 {
1109         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1110         struct print_option *p;
1111
1112         if (!job_opt_object)
1113                 return;
1114
1115         pdu->global = le16_to_cpu(pdu->global);
1116         pdu->truncated = le16_to_cpu(pdu->truncated);
1117         pdu->groupid = le32_to_cpu(pdu->groupid);
1118
1119         p = malloc(sizeof(*p));
1120         p->name = strdup((char *) pdu->name);
1121         if (pdu->value[0] != '\0')
1122                 p->value = strdup((char *) pdu->value);
1123         else
1124                 p->value = NULL;
1125
1126         if (pdu->global) {
1127                 const char *pos = "";
1128
1129                 if (p->value)
1130                         pos = p->value;
1131
1132                 json_object_add_value_string(job_opt_object, p->name, pos);
1133         } else if (client->opt_lists) {
1134                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1135
1136                 flist_add_tail(&p->list, opt_list);
1137         }
1138 }
1139
1140 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1141 {
1142         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1143         const char *buf = (const char *) pdu->buf;
1144         const char *name;
1145         int fio_unused ret;
1146         struct buf_output out;
1147
1148         buf_output_init(&out);
1149
1150         name = client->name ? client->name : client->hostname;
1151
1152         if (!client->skip_newline && !(output_format & FIO_OUTPUT_TERSE))
1153                 __log_buf(&out, "<%s> ", name);
1154         __log_buf(&out, "%s", buf);
1155         log_info_buf(out.buf, out.buflen);
1156         buf_output_free(&out);
1157         client->skip_newline = strchr(buf, '\n') == NULL;
1158 }
1159
1160 static void convert_agg(struct disk_util_agg *agg)
1161 {
1162         int i;
1163
1164         for (i = 0; i < 2; i++) {
1165                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1166                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1167                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1168                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1169         }
1170
1171         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1172         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1173         agg->slavecount         = le32_to_cpu(agg->slavecount);
1174         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1175 }
1176
1177 static void convert_dus(struct disk_util_stat *dus)
1178 {
1179         int i;
1180
1181         for (i = 0; i < 2; i++) {
1182                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1183                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1184                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1185                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1186         }
1187
1188         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1189         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1190         dus->s.msec             = le64_to_cpu(dus->s.msec);
1191 }
1192
1193 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1194 {
1195         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1196         struct buf_output out;
1197
1198         buf_output_init(&out);
1199
1200         if (!client->disk_stats_shown) {
1201                 client->disk_stats_shown = true;
1202                 if (!(output_format & FIO_OUTPUT_JSON))
1203                         __log_buf(&out, "\nDisk stats (read/write):\n");
1204         }
1205
1206         if (output_format & FIO_OUTPUT_JSON) {
1207                 struct json_object *duobj;
1208                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1209                 duobj = json_array_last_value_object(du_array);
1210                 json_object_add_client_info(duobj, client);
1211         }
1212         if (output_format & FIO_OUTPUT_TERSE)
1213                 print_disk_util(&du->dus, &du->agg, 1, &out);
1214         if (output_format & FIO_OUTPUT_NORMAL)
1215                 print_disk_util(&du->dus, &du->agg, 0, &out);
1216         buf_output_free(&out);
1217 }
1218
1219 static void convert_jobs_eta(struct jobs_eta *je)
1220 {
1221         int i;
1222
1223         je->nr_running          = le32_to_cpu(je->nr_running);
1224         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1225         je->nr_pending          = le32_to_cpu(je->nr_pending);
1226         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1227         je->files_open          = le32_to_cpu(je->files_open);
1228
1229         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1230                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1231                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1232                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1233                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1234                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1235                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1236         }
1237
1238         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1239         je->eta_sec             = le64_to_cpu(je->eta_sec);
1240         je->nr_threads          = le32_to_cpu(je->nr_threads);
1241         je->is_pow2             = le32_to_cpu(je->is_pow2);
1242         je->unit_base           = le32_to_cpu(je->unit_base);
1243         je->sig_figs            = le32_to_cpu(je->sig_figs);
1244 }
1245
1246 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1247 {
1248         int i;
1249
1250         dst->nr_running         += je->nr_running;
1251         dst->nr_ramp            += je->nr_ramp;
1252         dst->nr_pending         += je->nr_pending;
1253         dst->nr_setting_up      += je->nr_setting_up;
1254         dst->files_open         += je->files_open;
1255
1256         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1257                 dst->m_rate[i]  += je->m_rate[i];
1258                 dst->t_rate[i]  += je->t_rate[i];
1259                 dst->m_iops[i]  += je->m_iops[i];
1260                 dst->t_iops[i]  += je->t_iops[i];
1261                 dst->rate[i]    += je->rate[i];
1262                 dst->iops[i]    += je->iops[i];
1263         }
1264
1265         dst->elapsed_sec        += je->elapsed_sec;
1266
1267         if (je->eta_sec > dst->eta_sec)
1268                 dst->eta_sec = je->eta_sec;
1269
1270         dst->nr_threads         += je->nr_threads;
1271
1272         /*
1273          * This wont be correct for multiple strings, but at least it
1274          * works for the basic cases.
1275          */
1276         strcpy((char *) dst->run_str, (char *) je->run_str);
1277 }
1278
1279 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1280 {
1281         struct fio_net_cmd_reply *reply = NULL;
1282         struct flist_head *entry;
1283
1284         flist_for_each(entry, &client->cmd_list) {
1285                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1286
1287                 if (cmd->tag == (uintptr_t) reply)
1288                         break;
1289
1290                 reply = NULL;
1291         }
1292
1293         if (!reply) {
1294                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1295                 return false;
1296         }
1297
1298         flist_del(&reply->list);
1299         cmd->tag = reply->saved_tag;
1300         free(reply);
1301         return true;
1302 }
1303
1304 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1305 {
1306         do {
1307                 struct fio_net_cmd_reply *reply = NULL;
1308                 struct flist_head *entry;
1309
1310                 flist_for_each(entry, &client->cmd_list) {
1311                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1312
1313                         if (tag == (uintptr_t) reply)
1314                                 break;
1315
1316                         reply = NULL;
1317                 }
1318
1319                 if (!reply)
1320                         break;
1321
1322                 usleep(1000);
1323         } while (1);
1324
1325         return 0;
1326 }
1327
1328 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1329 {
1330         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1331         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1332
1333         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1334
1335         assert(client->eta_in_flight == eta);
1336
1337         client->eta_in_flight = NULL;
1338         flist_del_init(&client->eta_list);
1339         client->eta_timeouts = 0;
1340
1341         if (client->ops->jobs_eta)
1342                 client->ops->jobs_eta(client, je);
1343
1344         fio_client_sum_jobs_eta(&eta->eta, je);
1345         fio_client_dec_jobs_eta(eta, client->ops->eta);
1346 }
1347
1348 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1349                                       uint64_t sample_size)
1350 {
1351         struct io_sample *s;
1352         int log_offset;
1353         uint64_t i, j, nr_samples;
1354         struct io_u_plat_entry *entry;
1355         uint64_t *io_u_plat;
1356
1357         int stride = 1 << hist_coarseness;
1358
1359         if (!sample_size)
1360                 return;
1361
1362         s = __get_sample(samples, 0, 0);
1363         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1364
1365         nr_samples = sample_size / __log_entry_sz(log_offset);
1366
1367         for (i = 0; i < nr_samples; i++) {
1368
1369                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1370                         i * sizeof(struct io_u_plat_entry));
1371
1372                 entry = s->data.plat_entry;
1373                 io_u_plat = entry->io_u_plat;
1374
1375                 fprintf(f, "%lu, %u, %llu, ", (unsigned long) s->time,
1376                                                 io_sample_ddir(s), (unsigned long long) s->bs);
1377                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1378                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1379                 }
1380                 fprintf(f, "%llu\n", (unsigned long long)
1381                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1382
1383         }
1384 }
1385
1386 static int fio_client_handle_iolog(struct fio_client *client,
1387                                    struct fio_net_cmd *cmd)
1388 {
1389         struct cmd_iolog_pdu *pdu = NULL;
1390         bool store_direct;
1391         char *log_pathname = NULL;
1392         int ret = 0;
1393
1394         pdu = convert_iolog(cmd, &store_direct);
1395         if (!pdu) {
1396                 log_err("fio: failed converting IO log\n");
1397                 ret = 1;
1398                 goto out;
1399         }
1400
1401         /* allocate buffer big enough for next sprintf() call */
1402         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1403                         strlen(client->hostname));
1404         if (!log_pathname) {
1405                 log_err("fio: memory allocation of unique pathname failed\n");
1406                 ret = -1;
1407                 goto out;
1408         }
1409         /* generate a unique pathname for the log file using hostname */
1410         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1411
1412         if (store_direct) {
1413                 ssize_t wrote;
1414                 size_t sz;
1415                 int fd;
1416
1417                 fd = open((const char *) log_pathname,
1418                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1419                 if (fd < 0) {
1420                         log_err("fio: open log %s: %s\n",
1421                                 log_pathname, strerror(errno));
1422                         ret = 1;
1423                         goto out;
1424                 }
1425
1426                 sz = cmd->pdu_len - sizeof(*pdu);
1427                 wrote = write(fd, pdu->samples, sz);
1428                 close(fd);
1429
1430                 if (wrote != sz) {
1431                         log_err("fio: short write on compressed log\n");
1432                         ret = 1;
1433                         goto out;
1434                 }
1435
1436                 ret = 0;
1437         } else {
1438                 FILE *f;
1439                 f = fopen((const char *) log_pathname, "w");
1440                 if (!f) {
1441                         log_err("fio: fopen log %s : %s\n",
1442                                 log_pathname, strerror(errno));
1443                         ret = 1;
1444                         goto out;
1445                 }
1446
1447                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1448                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1449                                            pdu->nr_samples * sizeof(struct io_sample));
1450                 } else {
1451                         flush_samples(f, pdu->samples,
1452                                         pdu->nr_samples * sizeof(struct io_sample));
1453                 }
1454                 fclose(f);
1455                 ret = 0;
1456         }
1457
1458 out:
1459         if (pdu && pdu != (void *) cmd->payload)
1460                 free(pdu);
1461
1462         if (log_pathname)
1463                 free(log_pathname);
1464
1465         return ret;
1466 }
1467
1468 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1469 {
1470         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1471         const char *os, *arch;
1472         char bit[16];
1473
1474         os = fio_get_os_string(probe->os);
1475         if (!os)
1476                 os = "unknown";
1477
1478         arch = fio_get_arch_string(probe->arch);
1479         if (!arch)
1480                 os = "unknown";
1481
1482         sprintf(bit, "%d-bit", probe->bpp * 8);
1483         probe->flags = le64_to_cpu(probe->flags);
1484
1485         if (!(output_format & FIO_OUTPUT_JSON))
1486                 log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1487                         probe->hostname, probe->bigendian, bit, os, arch,
1488                         probe->fio_version, (unsigned long) probe->flags);
1489
1490         if (!client->name)
1491                 client->name = strdup((char *) probe->hostname);
1492 }
1493
1494 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1495 {
1496         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1497
1498         client->state = Client_started;
1499         client->jobs = le32_to_cpu(pdu->jobs);
1500         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1501
1502         if (client->jobs) {
1503                 int i;
1504
1505                 if (client->opt_lists)
1506                         free(client->opt_lists);
1507
1508                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1509                 for (i = 0; i < client->jobs; i++)
1510                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1511         }
1512
1513         sum_stat_clients += client->nr_stat;
1514 }
1515
1516 static void handle_stop(struct fio_client *client)
1517 {
1518         if (client->error)
1519                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1520 }
1521
1522 static void convert_stop(struct fio_net_cmd *cmd)
1523 {
1524         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1525
1526         pdu->error = le32_to_cpu(pdu->error);
1527 }
1528
1529 static void convert_text(struct fio_net_cmd *cmd)
1530 {
1531         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1532
1533         pdu->level      = le32_to_cpu(pdu->level);
1534         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1535         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1536         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1537 }
1538
1539 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1540                                               struct cmd_iolog_pdu *pdu)
1541 {
1542 #ifdef CONFIG_ZLIB
1543         struct cmd_iolog_pdu *ret;
1544         z_stream stream;
1545         uint64_t nr_samples;
1546         size_t total;
1547         char *p;
1548
1549         stream.zalloc = Z_NULL;
1550         stream.zfree = Z_NULL;
1551         stream.opaque = Z_NULL;
1552         stream.avail_in = 0;
1553         stream.next_in = Z_NULL;
1554
1555         if (inflateInit(&stream) != Z_OK)
1556                 return NULL;
1557
1558         /*
1559          * Get header first, it's not compressed
1560          */
1561         nr_samples = le64_to_cpu(pdu->nr_samples);
1562
1563         if (pdu->log_type == IO_LOG_TYPE_HIST)
1564                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1565                                         sizeof(struct io_u_plat_entry));
1566         else
1567                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1568         ret = malloc(total + sizeof(*pdu));
1569         ret->nr_samples = nr_samples;
1570
1571         memcpy(ret, pdu, sizeof(*pdu));
1572
1573         p = (char *) ret + sizeof(*pdu);
1574
1575         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1576         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1577         while (stream.avail_in) {
1578                 unsigned int this_chunk = 65536;
1579                 unsigned int this_len;
1580                 int err;
1581
1582                 if (this_chunk > total)
1583                         this_chunk = total;
1584
1585                 stream.avail_out = this_chunk;
1586                 stream.next_out = (void *)p;
1587                 err = inflate(&stream, Z_NO_FLUSH);
1588                 /* may be Z_OK, or Z_STREAM_END */
1589                 if (err < 0) {
1590                         log_err("fio: inflate error %d\n", err);
1591                         free(ret);
1592                         ret = NULL;
1593                         goto err;
1594                 }
1595
1596                 this_len = this_chunk - stream.avail_out;
1597                 p += this_len;
1598                 total -= this_len;
1599         }
1600
1601 err:
1602         inflateEnd(&stream);
1603         return ret;
1604 #else
1605         return NULL;
1606 #endif
1607 }
1608
1609 /*
1610  * This has been compressed on the server side, since it can be big.
1611  * Uncompress here.
1612  */
1613 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1614                                            bool *store_direct)
1615 {
1616         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1617         struct cmd_iolog_pdu *ret;
1618         uint64_t i;
1619         int compressed;
1620         void *samples;
1621
1622         *store_direct = false;
1623
1624         /*
1625          * Convert if compressed and we support it. If it's not
1626          * compressed, we need not do anything.
1627          */
1628         compressed = le32_to_cpu(pdu->compressed);
1629         if (compressed == XMIT_COMPRESSED) {
1630 #ifndef CONFIG_ZLIB
1631                 log_err("fio: server sent compressed data by mistake\n");
1632                 return NULL;
1633 #endif
1634                 ret = convert_iolog_gz(cmd, pdu);
1635                 if (!ret) {
1636                         log_err("fio: failed decompressing log\n");
1637                         return NULL;
1638                 }
1639         } else if (compressed == STORE_COMPRESSED) {
1640                 *store_direct = true;
1641                 ret = pdu;
1642         } else
1643                 ret = pdu;
1644
1645         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1646         ret->thread_number      = le32_to_cpu(ret->thread_number);
1647         ret->log_type           = le32_to_cpu(ret->log_type);
1648         ret->compressed         = le32_to_cpu(ret->compressed);
1649         ret->log_offset         = le32_to_cpu(ret->log_offset);
1650         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1651
1652         if (*store_direct)
1653                 return ret;
1654
1655         samples = &ret->samples[0];
1656         for (i = 0; i < ret->nr_samples; i++) {
1657                 struct io_sample *s;
1658
1659                 s = __get_sample(samples, ret->log_offset, i);
1660                 if (ret->log_type == IO_LOG_TYPE_HIST)
1661                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1662
1663                 s->time         = le64_to_cpu(s->time);
1664                 s->data.val     = le64_to_cpu(s->data.val);
1665                 s->__ddir       = le32_to_cpu(s->__ddir);
1666                 s->bs           = le64_to_cpu(s->bs);
1667
1668                 if (ret->log_offset) {
1669                         struct io_sample_offset *so = (void *) s;
1670
1671                         so->offset = le64_to_cpu(so->offset);
1672                 }
1673
1674                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1675                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1676                         s->data.plat_entry->list.next = NULL;
1677                         s->data.plat_entry->list.prev = NULL;
1678                 }
1679         }
1680
1681         return ret;
1682 }
1683
1684 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1685                            size_t size, uint64_t tag)
1686 {
1687         rep->error = cpu_to_le32(rep->error);
1688         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1689 }
1690
1691 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1692                          uint64_t tag)
1693 {
1694         struct cmd_sendfile_reply *rep;
1695         struct stat sb;
1696         size_t size;
1697         int fd;
1698
1699         size = sizeof(*rep);
1700         rep = malloc(size);
1701
1702         if (stat((char *)pdu->path, &sb) < 0) {
1703 fail:
1704                 rep->error = errno;
1705                 sendfile_reply(client->fd, rep, size, tag);
1706                 free(rep);
1707                 return 1;
1708         }
1709
1710         size += sb.st_size;
1711         rep = realloc(rep, size);
1712         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1713
1714         fd = open((char *)pdu->path, O_RDONLY);
1715         if (fd == -1 )
1716                 goto fail;
1717
1718         rep->error = read_data(fd, &rep->data, sb.st_size);
1719         sendfile_reply(client->fd, rep, size, tag);
1720         free(rep);
1721         close(fd);
1722         return 0;
1723 }
1724
1725 int fio_handle_client(struct fio_client *client)
1726 {
1727         struct client_ops *ops = client->ops;
1728         struct fio_net_cmd *cmd;
1729         int size;
1730
1731         dprint(FD_NET, "client: handle %s\n", client->hostname);
1732
1733         cmd = fio_net_recv_cmd(client->fd, true);
1734         if (!cmd)
1735                 return 0;
1736
1737         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1738                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1739
1740         client->last_cmd = cmd->opcode;
1741
1742         switch (cmd->opcode) {
1743         case FIO_NET_CMD_QUIT:
1744                 if (ops->quit)
1745                         ops->quit(client, cmd);
1746                 remove_client(client);
1747                 break;
1748         case FIO_NET_CMD_TEXT:
1749                 convert_text(cmd);
1750                 ops->text(client, cmd);
1751                 break;
1752         case FIO_NET_CMD_DU: {
1753                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1754
1755                 convert_dus(&du->dus);
1756                 convert_agg(&du->agg);
1757
1758                 ops->disk_util(client, cmd);
1759                 break;
1760                 }
1761         case FIO_NET_CMD_TS: {
1762                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1763
1764                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1765                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1766                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1767
1768                         size = le64_to_cpu(p->ts.ss_dur);
1769                         p->ts.ss_iops_data = (uint64_t *) ((struct cmd_ts_pdu *)cmd->payload + 1);
1770                         p->ts.ss_bw_data = p->ts.ss_iops_data + size;
1771                 }
1772
1773                 convert_ts(&p->ts, &p->ts);
1774                 convert_gs(&p->rs, &p->rs);
1775
1776                 ops->thread_status(client, cmd);
1777                 break;
1778                 }
1779         case FIO_NET_CMD_GS: {
1780                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1781
1782                 convert_gs(gs, gs);
1783
1784                 ops->group_stats(client, cmd);
1785                 break;
1786                 }
1787         case FIO_NET_CMD_ETA: {
1788                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1789
1790                 if (!remove_reply_cmd(client, cmd))
1791                         break;
1792                 convert_jobs_eta(je);
1793                 handle_eta(client, cmd);
1794                 break;
1795                 }
1796         case FIO_NET_CMD_PROBE:
1797                 remove_reply_cmd(client, cmd);
1798                 ops->probe(client, cmd);
1799                 break;
1800         case FIO_NET_CMD_SERVER_START:
1801                 client->state = Client_running;
1802                 if (ops->job_start)
1803                         ops->job_start(client, cmd);
1804                 break;
1805         case FIO_NET_CMD_START: {
1806                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1807
1808                 pdu->jobs = le32_to_cpu(pdu->jobs);
1809                 ops->start(client, cmd);
1810                 break;
1811                 }
1812         case FIO_NET_CMD_STOP: {
1813                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1814
1815                 convert_stop(cmd);
1816                 client->state = Client_stopped;
1817                 client->error = le32_to_cpu(pdu->error);
1818                 client->signal = le32_to_cpu(pdu->signal);
1819                 ops->stop(client);
1820                 break;
1821                 }
1822         case FIO_NET_CMD_ADD_JOB: {
1823                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1824
1825                 client->thread_number = le32_to_cpu(pdu->thread_number);
1826                 client->groupid = le32_to_cpu(pdu->groupid);
1827
1828                 if (ops->add_job)
1829                         ops->add_job(client, cmd);
1830                 break;
1831                 }
1832         case FIO_NET_CMD_IOLOG:
1833                 fio_client_handle_iolog(client, cmd);
1834                 break;
1835         case FIO_NET_CMD_UPDATE_JOB:
1836                 ops->update_job(client, cmd);
1837                 remove_reply_cmd(client, cmd);
1838                 break;
1839         case FIO_NET_CMD_VTRIGGER: {
1840                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1841                 char buf[128];
1842                 int off = 0;
1843
1844                 if (aux_path) {
1845                         strcpy(buf, aux_path);
1846                         off = strlen(buf);
1847                 }
1848
1849                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1850                 exec_trigger(trigger_cmd);
1851                 break;
1852                 }
1853         case FIO_NET_CMD_SENDFILE: {
1854                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1855                 fio_send_file(client, pdu, cmd->tag);
1856                 break;
1857                 }
1858         case FIO_NET_CMD_JOB_OPT: {
1859                 handle_job_opt(client, cmd);
1860                 break;
1861         }
1862         default:
1863                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1864                 break;
1865         }
1866
1867         free(cmd);
1868         return 1;
1869 }
1870
1871 int fio_clients_send_trigger(const char *cmd)
1872 {
1873         struct flist_head *entry;
1874         struct fio_client *client;
1875         size_t slen;
1876
1877         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1878
1879         if (!cmd)
1880                 slen = 0;
1881         else
1882                 slen = strlen(cmd);
1883
1884         flist_for_each(entry, &client_list) {
1885                 struct cmd_vtrigger_pdu *pdu;
1886
1887                 client = flist_entry(entry, struct fio_client, list);
1888
1889                 pdu = malloc(sizeof(*pdu) + slen);
1890                 pdu->len = cpu_to_le16((uint16_t) slen);
1891                 if (slen)
1892                         memcpy(pdu->cmd, cmd, slen);
1893                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1894                                         sizeof(*pdu) + slen, NULL, NULL);
1895                 free(pdu);
1896         }
1897
1898         return 0;
1899 }
1900
1901 static void request_client_etas(struct client_ops *ops)
1902 {
1903         struct fio_client *client;
1904         struct flist_head *entry;
1905         struct client_eta *eta;
1906         int skipped = 0;
1907
1908         if (eta_print == FIO_ETA_NEVER)
1909                 return;
1910
1911         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1912
1913         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1914         eta->pending = nr_clients;
1915
1916         flist_for_each(entry, &client_list) {
1917                 client = flist_entry(entry, struct fio_client, list);
1918
1919                 if (!flist_empty(&client->eta_list)) {
1920                         skipped++;
1921                         continue;
1922                 }
1923                 if (client->state != Client_running)
1924                         continue;
1925
1926                 assert(!client->eta_in_flight);
1927                 flist_add_tail(&client->eta_list, &eta_list);
1928                 client->eta_in_flight = eta;
1929                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1930                                         (uintptr_t) eta, &client->cmd_list);
1931         }
1932
1933         while (skipped--) {
1934                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1935                         break;
1936         }
1937
1938         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1939 }
1940
1941 /*
1942  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
1943  */
1944 static int handle_cmd_timeout(struct fio_client *client,
1945                               struct fio_net_cmd_reply *reply)
1946 {
1947         uint16_t reply_opcode = reply->opcode;
1948
1949         flist_del(&reply->list);
1950         free(reply);
1951
1952         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
1953                 return 1;
1954
1955         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
1956
1957         flist_del_init(&client->eta_list);
1958         if (client->eta_in_flight) {
1959                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
1960                 client->eta_in_flight = NULL;
1961         }
1962
1963         /*
1964          * If we fail 5 in a row, give up...
1965          */
1966         if (client->eta_timeouts++ > 5)
1967                 return 1;
1968
1969         return 0;
1970 }
1971
1972 static int client_check_cmd_timeout(struct fio_client *client,
1973                                     struct timespec *now)
1974 {
1975         struct fio_net_cmd_reply *reply;
1976         struct flist_head *entry, *tmp;
1977         int ret = 0;
1978
1979         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1980                 unsigned int op;
1981
1982                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1983
1984                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
1985                         continue;
1986
1987                 op = reply->opcode;
1988                 if (!handle_cmd_timeout(client, reply))
1989                         continue;
1990
1991                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1992                                                 fio_server_op(op));
1993                 ret = 1;
1994         }
1995
1996         return flist_empty(&client->cmd_list) && ret;
1997 }
1998
1999 static int fio_check_clients_timed_out(void)
2000 {
2001         struct fio_client *client;
2002         struct flist_head *entry, *tmp;
2003         struct timespec ts;
2004         int ret = 0;
2005
2006         fio_gettime(&ts, NULL);
2007
2008         flist_for_each_safe(entry, tmp, &client_list) {
2009                 client = flist_entry(entry, struct fio_client, list);
2010
2011                 if (flist_empty(&client->cmd_list))
2012                         continue;
2013
2014                 if (!client_check_cmd_timeout(client, &ts))
2015                         continue;
2016
2017                 if (client->ops->timed_out)
2018                         client->ops->timed_out(client);
2019                 else
2020                         log_err("fio: client %s timed out\n", client->hostname);
2021
2022                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
2023                         client->error = ETIMEDOUT;
2024                 else
2025                         log_info("fio: ignoring timeout due to vtrigger\n");
2026                 remove_client(client);
2027                 ret = 1;
2028         }
2029
2030         return ret;
2031 }
2032
2033 int fio_handle_clients(struct client_ops *ops)
2034 {
2035         struct pollfd *pfds;
2036         int i, ret = 0, retval = 0;
2037
2038         fio_gettime(&eta_ts, NULL);
2039
2040         pfds = malloc(nr_clients * sizeof(struct pollfd));
2041
2042         init_thread_stat(&client_ts);
2043         init_group_run_stat(&client_gs);
2044
2045         while (!exit_backend && nr_clients) {
2046                 struct flist_head *entry, *tmp;
2047                 struct fio_client *client;
2048
2049                 i = 0;
2050                 flist_for_each_safe(entry, tmp, &client_list) {
2051                         client = flist_entry(entry, struct fio_client, list);
2052
2053                         if (!client->sent_job && !client->ops->stay_connected &&
2054                             flist_empty(&client->cmd_list)) {
2055                                 remove_client(client);
2056                                 continue;
2057                         }
2058
2059                         pfds[i].fd = client->fd;
2060                         pfds[i].events = POLLIN;
2061                         i++;
2062                 }
2063
2064                 if (!nr_clients)
2065                         break;
2066
2067                 assert(i == nr_clients);
2068
2069                 do {
2070                         struct timespec ts;
2071                         int timeout;
2072
2073                         fio_gettime(&ts, NULL);
2074                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2075                                 request_client_etas(ops);
2076                                 memcpy(&eta_ts, &ts, sizeof(ts));
2077
2078                                 if (fio_check_clients_timed_out())
2079                                         break;
2080                         }
2081
2082                         check_trigger_file();
2083
2084                         timeout = min(100u, ops->eta_msec);
2085
2086                         ret = poll(pfds, nr_clients, timeout);
2087                         if (ret < 0) {
2088                                 if (errno == EINTR)
2089                                         continue;
2090                                 log_err("fio: poll clients: %s\n", strerror(errno));
2091                                 break;
2092                         } else if (!ret)
2093                                 continue;
2094                 } while (ret <= 0);
2095
2096                 for (i = 0; i < nr_clients; i++) {
2097                         if (!(pfds[i].revents & POLLIN))
2098                                 continue;
2099
2100                         client = find_client_by_fd(pfds[i].fd);
2101                         if (!client) {
2102                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2103                                 continue;
2104                         }
2105                         if (!fio_handle_client(client)) {
2106                                 log_info("client: host=%s disconnected\n",
2107                                                 client->hostname);
2108                                 remove_client(client);
2109                                 retval = 1;
2110                         } else if (client->error)
2111                                 retval = 1;
2112                         fio_put_client(client);
2113                 }
2114         }
2115
2116         fio_client_json_fini();
2117
2118         free(pfds);
2119         return retval || error_clients;
2120 }
2121
2122 static void client_display_thread_status(struct jobs_eta *je)
2123 {
2124         if (!(output_format & FIO_OUTPUT_JSON))
2125                 display_thread_status(je);
2126 }