client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <limits.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <sys/poll.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <sys/wait.h>
  11 #include <sys/socket.h>
  12 #include <sys/un.h>
  13 #include <netinet/in.h>
  14 #include <arpa/inet.h>
  15 #include <netdb.h>
  16 #include <signal.h>
  17 #ifdef CONFIG_ZLIB
  18 #include <zlib.h>
  19 #endif
  20
  21 #include "fio.h"
  22 #include "client.h"
  23 #include "server.h"
  24 #include "flist.h"
  25 #include "hash.h"
  26
  27 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  31 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  32 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  33 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  34
  35 struct client_ops fio_client_ops = {
  36         .text           = handle_text,
  37         .disk_util      = handle_du,
  38         .thread_status  = handle_ts,
  39         .group_stats    = handle_gs,
  40         .stop           = handle_stop,
  41         .start          = handle_start,
  42         .eta            = display_thread_status,
  43         .probe          = handle_probe,
  44         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  45         .client_type    = FIO_CLIENT_TYPE_CLI,
  46 };
  47
  48 static struct timeval eta_tv;
  49
  50 static FLIST_HEAD(client_list);
  51 static FLIST_HEAD(eta_list);
  52
  53 static FLIST_HEAD(arg_list);
  54
  55 struct thread_stat client_ts;
  56 struct group_run_stats client_gs;
  57 int sum_stat_clients;
  58
  59 static int sum_stat_nr;
  60 static struct json_object *root = NULL;
  61 static struct json_array *clients_array = NULL;
  62 static struct json_array *du_array = NULL;
  63
  64 #define FIO_CLIENT_HASH_BITS    7
  65 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  66 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  67 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  68
  69 static void fio_client_add_hash(struct fio_client *client)
  70 {
  71         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  72
  73         bucket &= FIO_CLIENT_HASH_MASK;
  74         flist_add(&client->hash_list, &client_hash[bucket]);
  75 }
  76
  77 static void fio_client_remove_hash(struct fio_client *client)
  78 {
  79         if (!flist_empty(&client->hash_list))
  80                 flist_del_init(&client->hash_list);
  81 }
  82
  83 static void fio_init fio_client_hash_init(void)
  84 {
  85         int i;
  86
  87         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  88                 INIT_FLIST_HEAD(&client_hash[i]);
  89 }
  90
  91 static void fio_client_json_init(void)
  92 {
  93         if (output_format != FIO_OUTPUT_JSON)
  94                 return;
  95         root = json_create_object();
  96         json_object_add_value_string(root, "fio version", fio_version_string);
  97         clients_array = json_create_array();
  98         json_object_add_value_array(root, "client_stats", clients_array);
  99         du_array = json_create_array();
 100         json_object_add_value_array(root, "disk_util", du_array);
 101 }
 102
 103 static void fio_client_json_fini(void)
 104 {
 105         if (output_format != FIO_OUTPUT_JSON)
 106                 return;
 107         json_print_object(root);
 108         log_info("\n");
 109         json_free_object(root);
 110         root = NULL;
 111         clients_array = NULL;
 112         du_array = NULL;
 113 }
 114
 115 static struct fio_client *find_client_by_fd(int fd)
 116 {
 117         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 118         struct fio_client *client;
 119         struct flist_head *entry;
 120
 121         flist_for_each(entry, &client_hash[bucket]) {
 122                 client = flist_entry(entry, struct fio_client, hash_list);
 123
 124                 if (client->fd == fd) {
 125                         client->refs++;
 126                         return client;
 127                 }
 128         }
 129
 130         return NULL;
 131 }
 132
 133 void fio_put_client(struct fio_client *client)
 134 {
 135         if (--client->refs)
 136                 return;
 137
 138         free(client->hostname);
 139         if (client->argv)
 140                 free(client->argv);
 141         if (client->name)
 142                 free(client->name);
 143         while (client->nr_files) {
 144                 struct client_file *cf = &client->files[--client->nr_files];
 145
 146                 free(cf->file);
 147         }
 148         if (client->files)
 149                 free(client->files);
 150
 151         if (!client->did_stat)
 152                 sum_stat_clients--;
 153
 154         free(client);
 155 }
 156
 157 static void remove_client(struct fio_client *client)
 158 {
 159         assert(client->refs);
 160
 161         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 162
 163         if (!flist_empty(&client->list))
 164                 flist_del_init(&client->list);
 165
 166         fio_client_remove_hash(client);
 167
 168         if (!flist_empty(&client->eta_list)) {
 169                 flist_del_init(&client->eta_list);
 170                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 171         }
 172
 173         close(client->fd);
 174         client->fd = -1;
 175
 176         if (client->ops->removed)
 177                 client->ops->removed(client);
 178
 179         nr_clients--;
 180         fio_put_client(client);
 181 }
 182
 183 struct fio_client *fio_get_client(struct fio_client *client)
 184 {
 185         client->refs++;
 186         return client;
 187 }
 188
 189 static void __fio_client_add_cmd_option(struct fio_client *client,
 190                                         const char *opt)
 191 {
 192         int index;
 193
 194         index = client->argc++;
 195         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 196         client->argv[index] = strdup(opt);
 197         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 198 }
 199
 200 void fio_client_add_cmd_option(void *cookie, const char *opt)
 201 {
 202         struct fio_client *client = cookie;
 203         struct flist_head *entry;
 204
 205         if (!client || !opt)
 206                 return;
 207
 208         __fio_client_add_cmd_option(client, opt);
 209
 210         /*
 211          * Duplicate arguments to shared client group
 212          */
 213         flist_for_each(entry, &arg_list) {
 214                 client = flist_entry(entry, struct fio_client, arg_list);
 215
 216                 __fio_client_add_cmd_option(client, opt);
 217         }
 218 }
 219
 220 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 221                                            const char *hostname, int type,
 222                                            int port)
 223 {
 224         struct fio_client *client;
 225
 226         client = malloc(sizeof(*client));
 227         memset(client, 0, sizeof(*client));
 228
 229         INIT_FLIST_HEAD(&client->list);
 230         INIT_FLIST_HEAD(&client->hash_list);
 231         INIT_FLIST_HEAD(&client->arg_list);
 232         INIT_FLIST_HEAD(&client->eta_list);
 233         INIT_FLIST_HEAD(&client->cmd_list);
 234
 235         client->hostname = strdup(hostname);
 236
 237         if (type == Fio_client_socket)
 238                 client->is_sock = 1;
 239         else {
 240                 int ipv6;
 241
 242                 ipv6 = type == Fio_client_ipv6;
 243                 if (fio_server_parse_host(hostname, ipv6,
 244                                                 &client->addr.sin_addr,
 245                                                 &client->addr6.sin6_addr))
 246                         goto err;
 247
 248                 client->port = port;
 249         }
 250
 251         client->fd = -1;
 252         client->ops = ops;
 253         client->refs = 1;
 254         client->type = ops->client_type;
 255
 256         __fio_client_add_cmd_option(client, "fio");
 257
 258         flist_add(&client->list, &client_list);
 259         nr_clients++;
 260         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 261         return client;
 262 err:
 263         free(client);
 264         return NULL;
 265 }
 266
 267 int fio_client_add_ini_file(void *cookie, const char *ini_file, int remote)
 268 {
 269         struct fio_client *client = cookie;
 270         struct client_file *cf;
 271         size_t new_size;
 272         void *new_files;
 273
 274         if (!client)
 275                 return 1;
 276
 277         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 278
 279         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 280         new_files = realloc(client->files, new_size);
 281         if (!new_files)
 282                 return 1;
 283
 284         client->files = new_files;
 285         cf = &client->files[client->nr_files];
 286         cf->file = strdup(ini_file);
 287         cf->remote = remote;
 288         client->nr_files++;
 289         return 0;
 290 }
 291
 292 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 293 {
 294         struct fio_client *existing = *cookie;
 295         struct fio_client *client;
 296
 297         if (existing) {
 298                 /*
 299                  * We always add our "exec" name as the option, hence 1
 300                  * means empty.
 301                  */
 302                 if (existing->argc == 1)
 303                         flist_add_tail(&existing->arg_list, &arg_list);
 304                 else {
 305                         while (!flist_empty(&arg_list))
 306                                 flist_del_init(arg_list.next);
 307                 }
 308         }
 309
 310         client = malloc(sizeof(*client));
 311         memset(client, 0, sizeof(*client));
 312
 313         INIT_FLIST_HEAD(&client->list);
 314         INIT_FLIST_HEAD(&client->hash_list);
 315         INIT_FLIST_HEAD(&client->arg_list);
 316         INIT_FLIST_HEAD(&client->eta_list);
 317         INIT_FLIST_HEAD(&client->cmd_list);
 318
 319         if (fio_server_parse_string(hostname, &client->hostname,
 320                                         &client->is_sock, &client->port,
 321                                         &client->addr.sin_addr,
 322                                         &client->addr6.sin6_addr,
 323                                         &client->ipv6))
 324                 return -1;
 325
 326         client->fd = -1;
 327         client->ops = ops;
 328         client->refs = 1;
 329         client->type = ops->client_type;
 330
 331         __fio_client_add_cmd_option(client, "fio");
 332
 333         flist_add(&client->list, &client_list);
 334         nr_clients++;
 335         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 336         *cookie = client;
 337         return 0;
 338 }
 339
 340 static void probe_client(struct fio_client *client)
 341 {
 342         struct cmd_client_probe_pdu pdu;
 343         uint64_t tag;
 344
 345         dprint(FD_NET, "client: send probe\n");
 346
 347 #ifdef CONFIG_ZLIB
 348         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 349 #else
 350         pdu.flags = 0;
 351 #endif
 352
 353         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 354 }
 355
 356 static int fio_client_connect_ip(struct fio_client *client)
 357 {
 358         struct sockaddr *addr;
 359         socklen_t socklen;
 360         int fd, domain;
 361
 362         if (client->ipv6) {
 363                 client->addr6.sin6_family = AF_INET6;
 364                 client->addr6.sin6_port = htons(client->port);
 365                 domain = AF_INET6;
 366                 addr = (struct sockaddr *) &client->addr6;
 367                 socklen = sizeof(client->addr6);
 368         } else {
 369                 client->addr.sin_family = AF_INET;
 370                 client->addr.sin_port = htons(client->port);
 371                 domain = AF_INET;
 372                 addr = (struct sockaddr *) &client->addr;
 373                 socklen = sizeof(client->addr);
 374         }
 375
 376         fd = socket(domain, SOCK_STREAM, 0);
 377         if (fd < 0) {
 378                 int ret = -errno;
 379
 380                 log_err("fio: socket: %s\n", strerror(errno));
 381                 return ret;
 382         }
 383
 384         if (connect(fd, addr, socklen) < 0) {
 385                 int ret = -errno;
 386
 387                 log_err("fio: connect: %s\n", strerror(errno));
 388                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 389                                                                 client->port);
 390                 close(fd);
 391                 return ret;
 392         }
 393
 394         return fd;
 395 }
 396
 397 static int fio_client_connect_sock(struct fio_client *client)
 398 {
 399         struct sockaddr_un *addr = &client->addr_un;
 400         socklen_t len;
 401         int fd;
 402
 403         memset(addr, 0, sizeof(*addr));
 404         addr->sun_family = AF_UNIX;
 405         strncpy(addr->sun_path, client->hostname, sizeof(addr->sun_path) - 1);
 406
 407         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 408         if (fd < 0) {
 409                 int ret = -errno;
 410
 411                 log_err("fio: socket: %s\n", strerror(errno));
 412                 return ret;
 413         }
 414
 415         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 416         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 417                 int ret = -errno;
 418
 419                 log_err("fio: connect; %s\n", strerror(errno));
 420                 close(fd);
 421                 return ret;
 422         }
 423
 424         return fd;
 425 }
 426
 427 int fio_client_connect(struct fio_client *client)
 428 {
 429         int fd;
 430
 431         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 432
 433         if (client->is_sock)
 434                 fd = fio_client_connect_sock(client);
 435         else
 436                 fd = fio_client_connect_ip(client);
 437
 438         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 439
 440         if (fd < 0)
 441                 return fd;
 442
 443         client->fd = fd;
 444         fio_client_add_hash(client);
 445         client->state = Client_connected;
 446
 447         probe_client(client);
 448         return 0;
 449 }
 450
 451 int fio_client_terminate(struct fio_client *client)
 452 {
 453         return fio_net_send_quit(client->fd);
 454 }
 455
 456 void fio_clients_terminate(void)
 457 {
 458         struct flist_head *entry;
 459         struct fio_client *client;
 460
 461         dprint(FD_NET, "client: terminate clients\n");
 462
 463         flist_for_each(entry, &client_list) {
 464                 client = flist_entry(entry, struct fio_client, list);
 465                 fio_client_terminate(client);
 466         }
 467 }
 468
 469 static void sig_int(int sig)
 470 {
 471         dprint(FD_NET, "client: got signal %d\n", sig);
 472         fio_clients_terminate();
 473 }
 474
 475 static void sig_show_status(int sig)
 476 {
 477         show_running_run_stats();
 478 }
 479
 480 static void client_signal_handler(void)
 481 {
 482         struct sigaction act;
 483
 484         memset(&act, 0, sizeof(act));
 485         act.sa_handler = sig_int;
 486         act.sa_flags = SA_RESTART;
 487         sigaction(SIGINT, &act, NULL);
 488
 489         memset(&act, 0, sizeof(act));
 490         act.sa_handler = sig_int;
 491         act.sa_flags = SA_RESTART;
 492         sigaction(SIGTERM, &act, NULL);
 493
 494 /* Windows uses SIGBREAK as a quit signal from other applications */
 495 #ifdef WIN32
 496         memset(&act, 0, sizeof(act));
 497         act.sa_handler = sig_int;
 498         act.sa_flags = SA_RESTART;
 499         sigaction(SIGBREAK, &act, NULL);
 500 #endif
 501
 502         memset(&act, 0, sizeof(act));
 503         act.sa_handler = sig_show_status;
 504         act.sa_flags = SA_RESTART;
 505         sigaction(SIGUSR1, &act, NULL);
 506 }
 507
 508 static int send_client_cmd_line(struct fio_client *client)
 509 {
 510         struct cmd_single_line_pdu *cslp;
 511         struct cmd_line_pdu *clp;
 512         unsigned long offset;
 513         unsigned int *lens;
 514         void *pdu;
 515         size_t mem;
 516         int i, ret;
 517
 518         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 519
 520         lens = malloc(client->argc * sizeof(unsigned int));
 521
 522         /*
 523          * Find out how much mem we need
 524          */
 525         for (i = 0, mem = 0; i < client->argc; i++) {
 526                 lens[i] = strlen(client->argv[i]) + 1;
 527                 mem += lens[i];
 528         }
 529
 530         /*
 531          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 532          */
 533         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 534
 535         pdu = malloc(mem);
 536         clp = pdu;
 537         offset = sizeof(*clp);
 538
 539         for (i = 0; i < client->argc; i++) {
 540                 uint16_t arg_len = lens[i];
 541
 542                 cslp = pdu + offset;
 543                 strcpy((char *) cslp->text, client->argv[i]);
 544                 cslp->len = cpu_to_le16(arg_len);
 545                 offset += sizeof(*cslp) + arg_len;
 546         }
 547
 548         free(lens);
 549         clp->lines = cpu_to_le16(client->argc);
 550         clp->client_type = __cpu_to_le16(client->type);
 551         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 552         free(pdu);
 553         return ret;
 554 }
 555
 556 int fio_clients_connect(void)
 557 {
 558         struct fio_client *client;
 559         struct flist_head *entry, *tmp;
 560         int ret;
 561
 562 #ifdef WIN32
 563         WSADATA wsd;
 564         WSAStartup(MAKEWORD(2, 2), &wsd);
 565 #endif
 566
 567         dprint(FD_NET, "client: connect all\n");
 568
 569         client_signal_handler();
 570
 571         flist_for_each_safe(entry, tmp, &client_list) {
 572                 client = flist_entry(entry, struct fio_client, list);
 573
 574                 ret = fio_client_connect(client);
 575                 if (ret) {
 576                         remove_client(client);
 577                         continue;
 578                 }
 579
 580                 if (client->argc > 1)
 581                         send_client_cmd_line(client);
 582         }
 583
 584         return !nr_clients;
 585 }
 586
 587 int fio_start_client(struct fio_client *client)
 588 {
 589         dprint(FD_NET, "client: start %s\n", client->hostname);
 590         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 591 }
 592
 593 int fio_start_all_clients(void)
 594 {
 595         struct fio_client *client;
 596         struct flist_head *entry, *tmp;
 597         int ret;
 598
 599         dprint(FD_NET, "client: start all\n");
 600
 601         fio_client_json_init();
 602
 603         flist_for_each_safe(entry, tmp, &client_list) {
 604                 client = flist_entry(entry, struct fio_client, list);
 605
 606                 ret = fio_start_client(client);
 607                 if (ret) {
 608                         remove_client(client);
 609                         continue;
 610                 }
 611         }
 612
 613         return flist_empty(&client_list);
 614 }
 615
 616 static int __fio_client_send_remote_ini(struct fio_client *client,
 617                                         const char *filename)
 618 {
 619         struct cmd_load_file_pdu *pdu;
 620         size_t p_size;
 621         int ret;
 622
 623         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 624
 625         p_size = sizeof(*pdu) + strlen(filename) + 1;
 626         pdu = malloc(p_size);
 627         memset(pdu, 0, p_size);
 628         pdu->name_len = strlen(filename);
 629         strcpy((char *) pdu->file, filename);
 630         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 631
 632         client->sent_job = 1;
 633         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 634         free(pdu);
 635         return ret;
 636 }
 637
 638 /*
 639  * Send file contents to server backend. We could use sendfile(), but to remain
 640  * more portable lets just read/write the darn thing.
 641  */
 642 static int __fio_client_send_local_ini(struct fio_client *client,
 643                                        const char *filename)
 644 {
 645         struct cmd_job_pdu *pdu;
 646         size_t p_size;
 647         struct stat sb;
 648         char *p;
 649         void *buf;
 650         off_t len;
 651         int fd, ret;
 652
 653         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 654
 655         fd = open(filename, O_RDONLY);
 656         if (fd < 0) {
 657                 ret = -errno;
 658                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 659                 return ret;
 660         }
 661
 662         if (fstat(fd, &sb) < 0) {
 663                 ret = -errno;
 664                 log_err("fio: job file stat: %s\n", strerror(errno));
 665                 close(fd);
 666                 return ret;
 667         }
 668
 669         p_size = sb.st_size + sizeof(*pdu);
 670         pdu = malloc(p_size);
 671         buf = pdu->buf;
 672
 673         len = sb.st_size;
 674         p = buf;
 675         do {
 676                 ret = read(fd, p, len);
 677                 if (ret > 0) {
 678                         len -= ret;
 679                         if (!len)
 680                                 break;
 681                         p += ret;
 682                         continue;
 683                 } else if (!ret)
 684                         break;
 685                 else if (errno == EAGAIN || errno == EINTR)
 686                         continue;
 687         } while (1);
 688
 689         if (len) {
 690                 log_err("fio: failed reading job file %s\n", filename);
 691                 close(fd);
 692                 free(pdu);
 693                 return 1;
 694         }
 695
 696         pdu->buf_len = __cpu_to_le32(sb.st_size);
 697         pdu->client_type = cpu_to_le32(client->type);
 698
 699         client->sent_job = 1;
 700         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 701         free(pdu);
 702         close(fd);
 703         return ret;
 704 }
 705
 706 int fio_client_send_ini(struct fio_client *client, const char *filename,
 707                         int remote)
 708 {
 709         int ret;
 710
 711         if (!remote)
 712                 ret = __fio_client_send_local_ini(client, filename);
 713         else
 714                 ret = __fio_client_send_remote_ini(client, filename);
 715
 716         if (!ret)
 717                 client->sent_job = 1;
 718
 719         return ret;
 720 }
 721
 722 static int fio_client_send_cf(struct fio_client *client,
 723                               struct client_file *cf)
 724 {
 725         return fio_client_send_ini(client, cf->file, cf->remote);
 726 }
 727
 728 int fio_clients_send_ini(const char *filename)
 729 {
 730         struct fio_client *client;
 731         struct flist_head *entry, *tmp;
 732
 733         flist_for_each_safe(entry, tmp, &client_list) {
 734                 client = flist_entry(entry, struct fio_client, list);
 735
 736                 if (client->nr_files) {
 737                         int i;
 738
 739                         for (i = 0; i < client->nr_files; i++) {
 740                                 struct client_file *cf;
 741
 742                                 cf = &client->files[i];
 743
 744                                 if (fio_client_send_cf(client, cf)) {
 745                                         remove_client(client);
 746                                         break;
 747                                 }
 748                         }
 749                 }
 750                 if (client->sent_job)
 751                         continue;
 752                 if (!filename || fio_client_send_ini(client, filename, 0))
 753                         remove_client(client);
 754         }
 755
 756         return !nr_clients;
 757 }
 758
 759 int fio_client_update_options(struct fio_client *client,
 760                               struct thread_options *o, uint64_t *tag)
 761 {
 762         struct cmd_add_job_pdu pdu;
 763
 764         pdu.thread_number = cpu_to_le32(client->thread_number);
 765         pdu.groupid = cpu_to_le32(client->groupid);
 766         convert_thread_options_to_net(&pdu.top, o);
 767
 768         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 769 }
 770
 771 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 772 {
 773         dst->max_val    = le64_to_cpu(src->max_val);
 774         dst->min_val    = le64_to_cpu(src->min_val);
 775         dst->samples    = le64_to_cpu(src->samples);
 776
 777         /*
 778          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 779          */
 780         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 781         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 782 }
 783
 784 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 785 {
 786         int i, j;
 787
 788         dst->error              = le32_to_cpu(src->error);
 789         dst->thread_number      = le32_to_cpu(src->thread_number);
 790         dst->groupid            = le32_to_cpu(src->groupid);
 791         dst->pid                = le32_to_cpu(src->pid);
 792         dst->members            = le32_to_cpu(src->members);
 793         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 794
 795         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 796                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 797                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 798                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 799                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 800         }
 801
 802         dst->usr_time           = le64_to_cpu(src->usr_time);
 803         dst->sys_time           = le64_to_cpu(src->sys_time);
 804         dst->ctx                = le64_to_cpu(src->ctx);
 805         dst->minf               = le64_to_cpu(src->minf);
 806         dst->majf               = le64_to_cpu(src->majf);
 807         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 808         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 809
 810         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 811                 fio_fp64_t *fps = &src->percentile_list[i];
 812                 fio_fp64_t *fpd = &dst->percentile_list[i];
 813
 814                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 815         }
 816
 817         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 818                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 819                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 820                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 821         }
 822
 823         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 824                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 825                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 826         }
 827
 828         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 829                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 830                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 831
 832         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 833                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 834                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 835                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
 836         }
 837
 838         dst->total_submit       = le64_to_cpu(src->total_submit);
 839         dst->total_complete     = le64_to_cpu(src->total_complete);
 840
 841         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 842                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 843                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 844         }
 845
 846         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 847         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 848         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 849         dst->first_error        = le32_to_cpu(src->first_error);
 850         dst->kb_base            = le32_to_cpu(src->kb_base);
 851         dst->unit_base          = le32_to_cpu(src->unit_base);
 852
 853         dst->latency_depth      = le32_to_cpu(src->latency_depth);
 854         dst->latency_target     = le64_to_cpu(src->latency_target);
 855         dst->latency_window     = le64_to_cpu(src->latency_window);
 856         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
 857 }
 858
 859 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 860 {
 861         int i;
 862
 863         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 864                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 865                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 866                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 867                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 868                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 869                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 870         }
 871
 872         dst->kb_base    = le32_to_cpu(src->kb_base);
 873         dst->unit_base  = le32_to_cpu(src->unit_base);
 874         dst->groupid    = le32_to_cpu(src->groupid);
 875         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 876 }
 877
 878 static void json_object_add_client_info(struct json_object *obj,
 879                                         struct fio_client *client)
 880 {
 881         const char *hostname = client->hostname ? client->hostname : "";
 882
 883         json_object_add_value_string(obj, "hostname", hostname);
 884         json_object_add_value_int(obj, "port", client->port);
 885 }
 886
 887 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 888 {
 889         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 890         struct json_object *tsobj;
 891
 892         tsobj = show_thread_status(&p->ts, &p->rs);
 893         client->did_stat = 1;
 894         if (tsobj) {
 895                 json_object_add_client_info(tsobj, client);
 896                 json_array_add_value_object(clients_array, tsobj);
 897         }
 898
 899         if (sum_stat_clients <= 1)
 900                 return;
 901
 902         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 903         sum_group_stats(&client_gs, &p->rs);
 904
 905         client_ts.members++;
 906         client_ts.thread_number = p->ts.thread_number;
 907         client_ts.groupid = p->ts.groupid;
 908         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
 909
 910         if (++sum_stat_nr == sum_stat_clients) {
 911                 strcpy(client_ts.name, "All clients");
 912                 tsobj = show_thread_status(&client_ts, &client_gs);
 913                 if (tsobj) {
 914                         json_object_add_client_info(tsobj, client);
 915                         json_array_add_value_object(clients_array, tsobj);
 916                 }
 917         }
 918 }
 919
 920 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 921 {
 922         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 923
 924         show_group_stats(gs);
 925 }
 926
 927 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 928 {
 929         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 930         const char *buf = (const char *) pdu->buf;
 931         const char *name;
 932         int fio_unused ret;
 933
 934         name = client->name ? client->name : client->hostname;
 935
 936         if (!client->skip_newline)
 937                 fprintf(f_out, "<%s> ", name);
 938         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 939         fflush(f_out);
 940         client->skip_newline = strchr(buf, '\n') == NULL;
 941 }
 942
 943 static void convert_agg(struct disk_util_agg *agg)
 944 {
 945         int i;
 946
 947         for (i = 0; i < 2; i++) {
 948                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 949                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 950                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 951                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 952         }
 953
 954         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 955         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 956         agg->slavecount         = le32_to_cpu(agg->slavecount);
 957         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
 958 }
 959
 960 static void convert_dus(struct disk_util_stat *dus)
 961 {
 962         int i;
 963
 964         for (i = 0; i < 2; i++) {
 965                 dus->s.ios[i]           = le32_to_cpu(dus->s.ios[i]);
 966                 dus->s.merges[i]        = le32_to_cpu(dus->s.merges[i]);
 967                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
 968                 dus->s.ticks[i]         = le32_to_cpu(dus->s.ticks[i]);
 969         }
 970
 971         dus->s.io_ticks         = le32_to_cpu(dus->s.io_ticks);
 972         dus->s.time_in_queue    = le32_to_cpu(dus->s.time_in_queue);
 973         dus->s.msec             = le64_to_cpu(dus->s.msec);
 974 }
 975
 976 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 977 {
 978         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 979
 980         if (!client->disk_stats_shown) {
 981                 client->disk_stats_shown = 1;
 982                 log_info("\nDisk stats (read/write):\n");
 983         }
 984
 985         if (output_format == FIO_OUTPUT_JSON) {
 986                 struct json_object *duobj;
 987                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
 988                 duobj = json_array_last_value_object(du_array);
 989                 json_object_add_client_info(duobj, client);
 990         } else
 991                 print_disk_util(&du->dus, &du->agg, output_format == FIO_OUTPUT_TERSE);
 992 }
 993
 994 static void convert_jobs_eta(struct jobs_eta *je)
 995 {
 996         int i;
 997
 998         je->nr_running          = le32_to_cpu(je->nr_running);
 999         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1000         je->nr_pending          = le32_to_cpu(je->nr_pending);
1001         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1002         je->files_open          = le32_to_cpu(je->files_open);
1003
1004         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1005                 je->m_rate[i]   = le32_to_cpu(je->m_rate[i]);
1006                 je->t_rate[i]   = le32_to_cpu(je->t_rate[i]);
1007                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1008                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1009                 je->rate[i]     = le32_to_cpu(je->rate[i]);
1010                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1011         }
1012
1013         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1014         je->eta_sec             = le64_to_cpu(je->eta_sec);
1015         je->nr_threads          = le32_to_cpu(je->nr_threads);
1016         je->is_pow2             = le32_to_cpu(je->is_pow2);
1017         je->unit_base           = le32_to_cpu(je->unit_base);
1018 }
1019
1020 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1021 {
1022         int i;
1023
1024         dst->nr_running         += je->nr_running;
1025         dst->nr_ramp            += je->nr_ramp;
1026         dst->nr_pending         += je->nr_pending;
1027         dst->nr_setting_up      += je->nr_setting_up;
1028         dst->files_open         += je->files_open;
1029
1030         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1031                 dst->m_rate[i]  += je->m_rate[i];
1032                 dst->t_rate[i]  += je->t_rate[i];
1033                 dst->m_iops[i]  += je->m_iops[i];
1034                 dst->t_iops[i]  += je->t_iops[i];
1035                 dst->rate[i]    += je->rate[i];
1036                 dst->iops[i]    += je->iops[i];
1037         }
1038
1039         dst->elapsed_sec        += je->elapsed_sec;
1040
1041         if (je->eta_sec > dst->eta_sec)
1042                 dst->eta_sec = je->eta_sec;
1043
1044         dst->nr_threads         += je->nr_threads;
1045
1046         /*
1047          * This wont be correct for multiple strings, but at least it
1048          * works for the basic cases.
1049          */
1050         strcpy((char *) dst->run_str, (char *) je->run_str);
1051 }
1052
1053 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
1054 {
1055         if (!--eta->pending) {
1056                 eta_fn(&eta->eta);
1057                 free(eta);
1058         }
1059 }
1060
1061 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1062 {
1063         struct fio_net_cmd_reply *reply = NULL;
1064         struct flist_head *entry;
1065
1066         flist_for_each(entry, &client->cmd_list) {
1067                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1068
1069                 if (cmd->tag == (uintptr_t) reply)
1070                         break;
1071
1072                 reply = NULL;
1073         }
1074
1075         if (!reply) {
1076                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1077                 return;
1078         }
1079
1080         flist_del(&reply->list);
1081         cmd->tag = reply->saved_tag;
1082         free(reply);
1083 }
1084
1085 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1086 {
1087         do {
1088                 struct fio_net_cmd_reply *reply = NULL;
1089                 struct flist_head *entry;
1090
1091                 flist_for_each(entry, &client->cmd_list) {
1092                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1093
1094                         if (tag == (uintptr_t) reply)
1095                                 break;
1096
1097                         reply = NULL;
1098                 }
1099
1100                 if (!reply)
1101                         break;
1102
1103                 usleep(1000);
1104         } while (1);
1105
1106         return 0;
1107 }
1108
1109 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1110 {
1111         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1112         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1113
1114         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1115
1116         assert(client->eta_in_flight == eta);
1117
1118         client->eta_in_flight = NULL;
1119         flist_del_init(&client->eta_list);
1120
1121         if (client->ops->jobs_eta)
1122                 client->ops->jobs_eta(client, je);
1123
1124         fio_client_sum_jobs_eta(&eta->eta, je);
1125         fio_client_dec_jobs_eta(eta, client->ops->eta);
1126 }
1127
1128 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1129 {
1130         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1131         const char *os, *arch;
1132         char bit[16];
1133
1134         os = fio_get_os_string(probe->os);
1135         if (!os)
1136                 os = "unknown";
1137
1138         arch = fio_get_arch_string(probe->arch);
1139         if (!arch)
1140                 os = "unknown";
1141
1142         sprintf(bit, "%d-bit", probe->bpp * 8);
1143         probe->flags = le64_to_cpu(probe->flags);
1144
1145         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1146                 probe->hostname, probe->bigendian, bit, os, arch,
1147                 probe->fio_version, (unsigned long) probe->flags);
1148
1149         if (!client->name)
1150                 client->name = strdup((char *) probe->hostname);
1151 }
1152
1153 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1154 {
1155         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1156
1157         client->state = Client_started;
1158         client->jobs = le32_to_cpu(pdu->jobs);
1159         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1160
1161         sum_stat_clients += client->nr_stat;
1162 }
1163
1164 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
1165 {
1166         if (client->error)
1167                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1168 }
1169
1170 static void convert_stop(struct fio_net_cmd *cmd)
1171 {
1172         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1173
1174         pdu->error = le32_to_cpu(pdu->error);
1175 }
1176
1177 static void convert_text(struct fio_net_cmd *cmd)
1178 {
1179         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1180
1181         pdu->level      = le32_to_cpu(pdu->level);
1182         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1183         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1184         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1185 }
1186
1187 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1188                                               struct cmd_iolog_pdu *pdu)
1189 {
1190 #ifdef CONFIG_ZLIB
1191         struct cmd_iolog_pdu *ret;
1192         z_stream stream;
1193         uint32_t nr_samples;
1194         size_t total;
1195         void *p;
1196
1197         stream.zalloc = Z_NULL;
1198         stream.zfree = Z_NULL;
1199         stream.opaque = Z_NULL;
1200         stream.avail_in = 0;
1201         stream.next_in = Z_NULL;
1202
1203         if (inflateInit(&stream) != Z_OK)
1204                 return NULL;
1205
1206         /*
1207          * Get header first, it's not compressed
1208          */
1209         nr_samples = le64_to_cpu(pdu->nr_samples);
1210
1211         total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1212         ret = malloc(total + sizeof(*pdu));
1213         ret->nr_samples = nr_samples;
1214
1215         memcpy(ret, pdu, sizeof(*pdu));
1216
1217         p = (void *) ret + sizeof(*pdu);
1218
1219         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1220         stream.next_in = (void *) pdu + sizeof(*pdu);
1221         while (stream.avail_in) {
1222                 unsigned int this_chunk = 65536;
1223                 unsigned int this_len;
1224                 int err;
1225
1226                 if (this_chunk > total)
1227                         this_chunk = total;
1228
1229                 stream.avail_out = this_chunk;
1230                 stream.next_out = p;
1231                 err = inflate(&stream, Z_NO_FLUSH);
1232                 /* may be Z_OK, or Z_STREAM_END */
1233                 if (err < 0) {
1234                         log_err("fio: inflate error %d\n", err);
1235                         free(ret);
1236                         ret = NULL;
1237                         goto err;
1238                 }
1239
1240                 this_len = this_chunk - stream.avail_out;
1241                 p += this_len;
1242                 total -= this_len;
1243         }
1244
1245 err:
1246         inflateEnd(&stream);
1247         return ret;
1248 #else
1249         return NULL;
1250 #endif
1251 }
1252
1253 /*
1254  * This has been compressed on the server side, since it can be big.
1255  * Uncompress here.
1256  */
1257 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd)
1258 {
1259         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1260         struct cmd_iolog_pdu *ret;
1261         uint64_t i;
1262         void *samples;
1263
1264         /*
1265          * Convert if compressed and we support it. If it's not
1266          * compressed, we need not do anything.
1267          */
1268         if (le32_to_cpu(pdu->compressed)) {
1269 #ifndef CONFIG_ZLIB
1270                 log_err("fio: server sent compressed data by mistake\n");
1271                 return NULL;
1272 #endif
1273                 ret = convert_iolog_gz(cmd, pdu);
1274                 if (!ret) {
1275                         log_err("fio: failed decompressing log\n");
1276                         return NULL;
1277                 }
1278         } else
1279                 ret = pdu;
1280
1281         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1282         ret->thread_number      = le32_to_cpu(ret->thread_number);
1283         ret->log_type           = le32_to_cpu(ret->log_type);
1284         ret->compressed         = le32_to_cpu(ret->compressed);
1285         ret->log_offset         = le32_to_cpu(ret->log_offset);
1286
1287         samples = &ret->samples[0];
1288         for (i = 0; i < ret->nr_samples; i++) {
1289                 struct io_sample *s;
1290
1291                 s = __get_sample(samples, ret->log_offset, i);
1292                 s->time         = le64_to_cpu(s->time);
1293                 s->val          = le64_to_cpu(s->val);
1294                 s->__ddir       = le32_to_cpu(s->__ddir);
1295                 s->bs           = le32_to_cpu(s->bs);
1296
1297                 if (ret->log_offset) {
1298                         struct io_sample_offset *so = (void *) s;
1299
1300                         so->offset = le64_to_cpu(so->offset);
1301                 }
1302         }
1303
1304         return ret;
1305 }
1306
1307 int fio_handle_client(struct fio_client *client)
1308 {
1309         struct client_ops *ops = client->ops;
1310         struct fio_net_cmd *cmd;
1311
1312         dprint(FD_NET, "client: handle %s\n", client->hostname);
1313
1314         cmd = fio_net_recv_cmd(client->fd);
1315         if (!cmd)
1316                 return 0;
1317
1318         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1319                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1320
1321         switch (cmd->opcode) {
1322         case FIO_NET_CMD_QUIT:
1323                 if (ops->quit)
1324                         ops->quit(client, cmd);
1325                 remove_client(client);
1326                 free(cmd);
1327                 break;
1328         case FIO_NET_CMD_TEXT:
1329                 convert_text(cmd);
1330                 ops->text(client, cmd);
1331                 free(cmd);
1332                 break;
1333         case FIO_NET_CMD_DU: {
1334                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1335
1336                 convert_dus(&du->dus);
1337                 convert_agg(&du->agg);
1338
1339                 ops->disk_util(client, cmd);
1340                 free(cmd);
1341                 break;
1342                 }
1343         case FIO_NET_CMD_TS: {
1344                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1345
1346                 convert_ts(&p->ts, &p->ts);
1347                 convert_gs(&p->rs, &p->rs);
1348
1349                 ops->thread_status(client, cmd);
1350                 free(cmd);
1351                 break;
1352                 }
1353         case FIO_NET_CMD_GS: {
1354                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1355
1356                 convert_gs(gs, gs);
1357
1358                 ops->group_stats(client, cmd);
1359                 free(cmd);
1360                 break;
1361                 }
1362         case FIO_NET_CMD_ETA: {
1363                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1364
1365                 remove_reply_cmd(client, cmd);
1366                 convert_jobs_eta(je);
1367                 handle_eta(client, cmd);
1368                 free(cmd);
1369                 break;
1370                 }
1371         case FIO_NET_CMD_PROBE:
1372                 remove_reply_cmd(client, cmd);
1373                 ops->probe(client, cmd);
1374                 free(cmd);
1375                 break;
1376         case FIO_NET_CMD_SERVER_START:
1377                 client->state = Client_running;
1378                 if (ops->job_start)
1379                         ops->job_start(client, cmd);
1380                 free(cmd);
1381                 break;
1382         case FIO_NET_CMD_START: {
1383                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1384
1385                 pdu->jobs = le32_to_cpu(pdu->jobs);
1386                 ops->start(client, cmd);
1387                 free(cmd);
1388                 break;
1389                 }
1390         case FIO_NET_CMD_STOP: {
1391                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1392
1393                 convert_stop(cmd);
1394                 client->state = Client_stopped;
1395                 client->error = le32_to_cpu(pdu->error);
1396                 client->signal = le32_to_cpu(pdu->signal);
1397                 ops->stop(client, cmd);
1398                 free(cmd);
1399                 break;
1400                 }
1401         case FIO_NET_CMD_ADD_JOB: {
1402                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1403
1404                 client->thread_number = le32_to_cpu(pdu->thread_number);
1405                 client->groupid = le32_to_cpu(pdu->groupid);
1406
1407                 if (ops->add_job)
1408                         ops->add_job(client, cmd);
1409                 free(cmd);
1410                 break;
1411                 }
1412         case FIO_NET_CMD_IOLOG:
1413                 if (ops->iolog) {
1414                         struct cmd_iolog_pdu *pdu;
1415
1416                         pdu = convert_iolog(cmd);
1417                         ops->iolog(client, pdu);
1418                 }
1419                 free(cmd);
1420                 break;
1421         case FIO_NET_CMD_UPDATE_JOB:
1422                 ops->update_job(client, cmd);
1423                 remove_reply_cmd(client, cmd);
1424                 free(cmd);
1425                 break;
1426         default:
1427                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1428                 free(cmd);
1429                 break;
1430         }
1431
1432         return 1;
1433 }
1434
1435 static void request_client_etas(struct client_ops *ops)
1436 {
1437         struct fio_client *client;
1438         struct flist_head *entry;
1439         struct client_eta *eta;
1440         int skipped = 0;
1441
1442         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1443
1444         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1445         eta->pending = nr_clients;
1446
1447         flist_for_each(entry, &client_list) {
1448                 client = flist_entry(entry, struct fio_client, list);
1449
1450                 if (!flist_empty(&client->eta_list)) {
1451                         skipped++;
1452                         continue;
1453                 }
1454                 if (client->state != Client_running)
1455                         continue;
1456
1457                 assert(!client->eta_in_flight);
1458                 flist_add_tail(&client->eta_list, &eta_list);
1459                 client->eta_in_flight = eta;
1460                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1461                                         (uintptr_t) eta, &client->cmd_list);
1462         }
1463
1464         while (skipped--)
1465                 fio_client_dec_jobs_eta(eta, ops->eta);
1466
1467         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1468 }
1469
1470 static int client_check_cmd_timeout(struct fio_client *client,
1471                                     struct timeval *now)
1472 {
1473         struct fio_net_cmd_reply *reply;
1474         struct flist_head *entry, *tmp;
1475         int ret = 0;
1476
1477         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1478                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1479
1480                 if (mtime_since(&reply->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1481                         continue;
1482
1483                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1484                                                 fio_server_op(reply->opcode));
1485                 flist_del(&reply->list);
1486                 free(reply);
1487                 ret = 1;
1488         }
1489
1490         return flist_empty(&client->cmd_list) && ret;
1491 }
1492
1493 static int fio_check_clients_timed_out(void)
1494 {
1495         struct fio_client *client;
1496         struct flist_head *entry, *tmp;
1497         struct timeval tv;
1498         int ret = 0;
1499
1500         fio_gettime(&tv, NULL);
1501
1502         flist_for_each_safe(entry, tmp, &client_list) {
1503                 client = flist_entry(entry, struct fio_client, list);
1504
1505                 if (flist_empty(&client->cmd_list))
1506                         continue;
1507
1508                 if (!client_check_cmd_timeout(client, &tv))
1509                         continue;
1510
1511                 if (client->ops->timed_out)
1512                         client->ops->timed_out(client);
1513                 else
1514                         log_err("fio: client %s timed out\n", client->hostname);
1515
1516                 remove_client(client);
1517                 ret = 1;
1518         }
1519
1520         return ret;
1521 }
1522
1523 int fio_handle_clients(struct client_ops *ops)
1524 {
1525         struct pollfd *pfds;
1526         int i, ret = 0, retval = 0;
1527
1528         fio_gettime(&eta_tv, NULL);
1529
1530         pfds = malloc(nr_clients * sizeof(struct pollfd));
1531
1532         init_thread_stat(&client_ts);
1533         init_group_run_stat(&client_gs);
1534
1535         while (!exit_backend && nr_clients) {
1536                 struct flist_head *entry, *tmp;
1537                 struct fio_client *client;
1538
1539                 i = 0;
1540                 flist_for_each_safe(entry, tmp, &client_list) {
1541                         client = flist_entry(entry, struct fio_client, list);
1542
1543                         if (!client->sent_job && !client->ops->stay_connected &&
1544                             flist_empty(&client->cmd_list)) {
1545                                 remove_client(client);
1546                                 continue;
1547                         }
1548
1549                         pfds[i].fd = client->fd;
1550                         pfds[i].events = POLLIN;
1551                         i++;
1552                 }
1553
1554                 if (!nr_clients)
1555                         break;
1556
1557                 assert(i == nr_clients);
1558
1559                 do {
1560                         struct timeval tv;
1561
1562                         fio_gettime(&tv, NULL);
1563                         if (mtime_since(&eta_tv, &tv) >= 900) {
1564                                 request_client_etas(ops);
1565                                 memcpy(&eta_tv, &tv, sizeof(tv));
1566
1567                                 if (fio_check_clients_timed_out())
1568                                         break;
1569                         }
1570
1571                         ret = poll(pfds, nr_clients, ops->eta_msec);
1572                         if (ret < 0) {
1573                                 if (errno == EINTR)
1574                                         continue;
1575                                 log_err("fio: poll clients: %s\n", strerror(errno));
1576                                 break;
1577                         } else if (!ret)
1578                                 continue;
1579                 } while (ret <= 0);
1580
1581                 for (i = 0; i < nr_clients; i++) {
1582                         if (!(pfds[i].revents & POLLIN))
1583                                 continue;
1584
1585                         client = find_client_by_fd(pfds[i].fd);
1586                         if (!client) {
1587                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
1588                                 continue;
1589                         }
1590                         if (!fio_handle_client(client)) {
1591                                 log_info("client: host=%s disconnected\n",
1592                                                 client->hostname);
1593                                 remove_client(client);
1594                                 retval = 1;
1595                         } else if (client->error)
1596                                 retval = 1;
1597                         fio_put_client(client);
1598                 }
1599         }
1600
1601         fio_client_json_fini();
1602
1603         free(pfds);
1604         return retval;
1605 }