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
 809         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 810                 fio_fp64_t *fps = &src->percentile_list[i];
 811                 fio_fp64_t *fpd = &dst->percentile_list[i];
 812
 813                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 814         }
 815
 816         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 817                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 818                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 819                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 820         }
 821
 822         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 823                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 824                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 825         }
 826
 827         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 828                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 829                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 830
 831         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 832                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 833                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 834                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
 835         }
 836
 837         dst->total_submit       = le64_to_cpu(src->total_submit);
 838         dst->total_complete     = le64_to_cpu(src->total_complete);
 839
 840         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 841                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 842                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 843         }
 844
 845         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 846         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 847         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 848         dst->first_error        = le32_to_cpu(src->first_error);
 849         dst->kb_base            = le32_to_cpu(src->kb_base);
 850         dst->unit_base          = le32_to_cpu(src->unit_base);
 851
 852         dst->latency_depth      = le32_to_cpu(src->latency_depth);
 853         dst->latency_target     = le64_to_cpu(src->latency_target);
 854         dst->latency_window     = le64_to_cpu(src->latency_window);
 855         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
 856 }
 857
 858 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 859 {
 860         int i;
 861
 862         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 863                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 864                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 865                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 866                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 867                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 868                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 869         }
 870
 871         dst->kb_base    = le32_to_cpu(src->kb_base);
 872         dst->unit_base  = le32_to_cpu(src->unit_base);
 873         dst->groupid    = le32_to_cpu(src->groupid);
 874         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 875 }
 876
 877 static void json_object_add_client_info(struct json_object *obj,
 878                                         struct fio_client *client)
 879 {
 880         const char *hostname = client->hostname ? client->hostname : "";
 881
 882         json_object_add_value_string(obj, "hostname", hostname);
 883         json_object_add_value_int(obj, "port", client->port);
 884 }
 885
 886 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 887 {
 888         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 889         struct json_object *tsobj;
 890
 891         tsobj = show_thread_status(&p->ts, &p->rs);
 892         client->did_stat = 1;
 893         if (tsobj) {
 894                 json_object_add_client_info(tsobj, client);
 895                 json_array_add_value_object(clients_array, tsobj);
 896         }
 897
 898         if (sum_stat_clients <= 1)
 899                 return;
 900
 901         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 902         sum_group_stats(&client_gs, &p->rs);
 903
 904         client_ts.members++;
 905         client_ts.thread_number = p->ts.thread_number;
 906         client_ts.groupid = p->ts.groupid;
 907         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
 908
 909         if (++sum_stat_nr == sum_stat_clients) {
 910                 strcpy(client_ts.name, "All clients");
 911                 tsobj = show_thread_status(&client_ts, &client_gs);
 912                 if (tsobj) {
 913                         json_object_add_client_info(tsobj, client);
 914                         json_array_add_value_object(clients_array, tsobj);
 915                 }
 916         }
 917 }
 918
 919 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 920 {
 921         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 922
 923         show_group_stats(gs);
 924 }
 925
 926 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 927 {
 928         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 929         const char *buf = (const char *) pdu->buf;
 930         const char *name;
 931         int fio_unused ret;
 932
 933         name = client->name ? client->name : client->hostname;
 934
 935         if (!client->skip_newline)
 936                 fprintf(f_out, "<%s> ", name);
 937         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 938         fflush(f_out);
 939         client->skip_newline = strchr(buf, '\n') == NULL;
 940 }
 941
 942 static void convert_agg(struct disk_util_agg *agg)
 943 {
 944         int i;
 945
 946         for (i = 0; i < 2; i++) {
 947                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 948                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 949                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 950                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 951         }
 952
 953         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 954         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 955         agg->slavecount         = le32_to_cpu(agg->slavecount);
 956         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
 957 }
 958
 959 static void convert_dus(struct disk_util_stat *dus)
 960 {
 961         int i;
 962
 963         for (i = 0; i < 2; i++) {
 964                 dus->s.ios[i]           = le32_to_cpu(dus->s.ios[i]);
 965                 dus->s.merges[i]        = le32_to_cpu(dus->s.merges[i]);
 966                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
 967                 dus->s.ticks[i]         = le32_to_cpu(dus->s.ticks[i]);
 968         }
 969
 970         dus->s.io_ticks         = le32_to_cpu(dus->s.io_ticks);
 971         dus->s.time_in_queue    = le32_to_cpu(dus->s.time_in_queue);
 972         dus->s.msec             = le64_to_cpu(dus->s.msec);
 973 }
 974
 975 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 976 {
 977         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 978
 979         if (!client->disk_stats_shown) {
 980                 client->disk_stats_shown = 1;
 981                 log_info("\nDisk stats (read/write):\n");
 982         }
 983
 984         if (output_format == FIO_OUTPUT_JSON) {
 985                 struct json_object *duobj;
 986                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
 987                 duobj = json_array_last_value_object(du_array);
 988                 json_object_add_client_info(duobj, client);
 989         } else
 990                 print_disk_util(&du->dus, &du->agg, output_format == FIO_OUTPUT_TERSE);
 991 }
 992
 993 static void convert_jobs_eta(struct jobs_eta *je)
 994 {
 995         int i;
 996
 997         je->nr_running          = le32_to_cpu(je->nr_running);
 998         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 999         je->nr_pending          = le32_to_cpu(je->nr_pending);
1000         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1001         je->files_open          = le32_to_cpu(je->files_open);
1002
1003         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1004                 je->m_rate[i]   = le32_to_cpu(je->m_rate[i]);
1005                 je->t_rate[i]   = le32_to_cpu(je->t_rate[i]);
1006                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1007                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1008                 je->rate[i]     = le32_to_cpu(je->rate[i]);
1009                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1010         }
1011
1012         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1013         je->eta_sec             = le64_to_cpu(je->eta_sec);
1014         je->nr_threads          = le32_to_cpu(je->nr_threads);
1015         je->is_pow2             = le32_to_cpu(je->is_pow2);
1016         je->unit_base           = le32_to_cpu(je->unit_base);
1017 }
1018
1019 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1020 {
1021         int i;
1022
1023         dst->nr_running         += je->nr_running;
1024         dst->nr_ramp            += je->nr_ramp;
1025         dst->nr_pending         += je->nr_pending;
1026         dst->nr_setting_up      += je->nr_setting_up;
1027         dst->files_open         += je->files_open;
1028
1029         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1030                 dst->m_rate[i]  += je->m_rate[i];
1031                 dst->t_rate[i]  += je->t_rate[i];
1032                 dst->m_iops[i]  += je->m_iops[i];
1033                 dst->t_iops[i]  += je->t_iops[i];
1034                 dst->rate[i]    += je->rate[i];
1035                 dst->iops[i]    += je->iops[i];
1036         }
1037
1038         dst->elapsed_sec        += je->elapsed_sec;
1039
1040         if (je->eta_sec > dst->eta_sec)
1041                 dst->eta_sec = je->eta_sec;
1042
1043         dst->nr_threads         += je->nr_threads;
1044
1045         /*
1046          * This wont be correct for multiple strings, but at least it
1047          * works for the basic cases.
1048          */
1049         strcpy((char *) dst->run_str, (char *) je->run_str);
1050 }
1051
1052 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
1053 {
1054         if (!--eta->pending) {
1055                 eta_fn(&eta->eta);
1056                 free(eta);
1057         }
1058 }
1059
1060 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1061 {
1062         struct fio_net_cmd_reply *reply = NULL;
1063         struct flist_head *entry;
1064
1065         flist_for_each(entry, &client->cmd_list) {
1066                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1067
1068                 if (cmd->tag == (uintptr_t) reply)
1069                         break;
1070
1071                 reply = NULL;
1072         }
1073
1074         if (!reply) {
1075                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1076                 return;
1077         }
1078
1079         flist_del(&reply->list);
1080         cmd->tag = reply->saved_tag;
1081         free(reply);
1082 }
1083
1084 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1085 {
1086         do {
1087                 struct fio_net_cmd_reply *reply = NULL;
1088                 struct flist_head *entry;
1089
1090                 flist_for_each(entry, &client->cmd_list) {
1091                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1092
1093                         if (tag == (uintptr_t) reply)
1094                                 break;
1095
1096                         reply = NULL;
1097                 }
1098
1099                 if (!reply)
1100                         break;
1101
1102                 usleep(1000);
1103         } while (1);
1104
1105         return 0;
1106 }
1107
1108 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1109 {
1110         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1111         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1112
1113         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1114
1115         assert(client->eta_in_flight == eta);
1116
1117         client->eta_in_flight = NULL;
1118         flist_del_init(&client->eta_list);
1119
1120         if (client->ops->jobs_eta)
1121                 client->ops->jobs_eta(client, je);
1122
1123         fio_client_sum_jobs_eta(&eta->eta, je);
1124         fio_client_dec_jobs_eta(eta, client->ops->eta);
1125 }
1126
1127 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1128 {
1129         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1130         const char *os, *arch;
1131         char bit[16];
1132
1133         os = fio_get_os_string(probe->os);
1134         if (!os)
1135                 os = "unknown";
1136
1137         arch = fio_get_arch_string(probe->arch);
1138         if (!arch)
1139                 os = "unknown";
1140
1141         sprintf(bit, "%d-bit", probe->bpp * 8);
1142         probe->flags = le64_to_cpu(probe->flags);
1143
1144         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1145                 probe->hostname, probe->bigendian, bit, os, arch,
1146                 probe->fio_version, (unsigned long) probe->flags);
1147
1148         if (!client->name)
1149                 client->name = strdup((char *) probe->hostname);
1150 }
1151
1152 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1153 {
1154         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1155
1156         client->state = Client_started;
1157         client->jobs = le32_to_cpu(pdu->jobs);
1158         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1159
1160         sum_stat_clients += client->nr_stat;
1161 }
1162
1163 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
1164 {
1165         if (client->error)
1166                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1167 }
1168
1169 static void convert_stop(struct fio_net_cmd *cmd)
1170 {
1171         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1172
1173         pdu->error = le32_to_cpu(pdu->error);
1174 }
1175
1176 static void convert_text(struct fio_net_cmd *cmd)
1177 {
1178         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1179
1180         pdu->level      = le32_to_cpu(pdu->level);
1181         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1182         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1183         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1184 }
1185
1186 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1187                                               struct cmd_iolog_pdu *pdu)
1188 {
1189 #ifdef CONFIG_ZLIB
1190         struct cmd_iolog_pdu *ret;
1191         z_stream stream;
1192         uint32_t nr_samples;
1193         size_t total;
1194         void *p;
1195
1196         stream.zalloc = Z_NULL;
1197         stream.zfree = Z_NULL;
1198         stream.opaque = Z_NULL;
1199         stream.avail_in = 0;
1200         stream.next_in = Z_NULL;
1201
1202         if (inflateInit(&stream) != Z_OK)
1203                 return NULL;
1204
1205         /*
1206          * Get header first, it's not compressed
1207          */
1208         nr_samples = le64_to_cpu(pdu->nr_samples);
1209
1210         total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1211         ret = malloc(total + sizeof(*pdu));
1212         ret->nr_samples = nr_samples;
1213
1214         memcpy(ret, pdu, sizeof(*pdu));
1215
1216         p = (void *) ret + sizeof(*pdu);
1217
1218         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1219         stream.next_in = (void *) pdu + sizeof(*pdu);
1220         while (stream.avail_in) {
1221                 unsigned int this_chunk = 65536;
1222                 unsigned int this_len;
1223                 int err;
1224
1225                 if (this_chunk > total)
1226                         this_chunk = total;
1227
1228                 stream.avail_out = this_chunk;
1229                 stream.next_out = p;
1230                 err = inflate(&stream, Z_NO_FLUSH);
1231                 /* may be Z_OK, or Z_STREAM_END */
1232                 if (err < 0) {
1233                         log_err("fio: inflate error %d\n", err);
1234                         free(ret);
1235                         ret = NULL;
1236                         goto err;
1237                 }
1238
1239                 this_len = this_chunk - stream.avail_out;
1240                 p += this_len;
1241                 total -= this_len;
1242         }
1243
1244 err:
1245         inflateEnd(&stream);
1246         return ret;
1247 #else
1248         return NULL;
1249 #endif
1250 }
1251
1252 /*
1253  * This has been compressed on the server side, since it can be big.
1254  * Uncompress here.
1255  */
1256 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd)
1257 {
1258         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1259         struct cmd_iolog_pdu *ret;
1260         uint64_t i;
1261         void *samples;
1262
1263         /*
1264          * Convert if compressed and we support it. If it's not
1265          * compressed, we need not do anything.
1266          */
1267         if (le32_to_cpu(pdu->compressed)) {
1268 #ifndef CONFIG_ZLIB
1269                 log_err("fio: server sent compressed data by mistake\n");
1270                 return NULL;
1271 #endif
1272                 ret = convert_iolog_gz(cmd, pdu);
1273                 if (!ret) {
1274                         log_err("fio: failed decompressing log\n");
1275                         return NULL;
1276                 }
1277         } else
1278                 ret = pdu;
1279
1280         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1281         ret->thread_number      = le32_to_cpu(ret->thread_number);
1282         ret->log_type           = le32_to_cpu(ret->log_type);
1283         ret->compressed         = le32_to_cpu(ret->compressed);
1284         ret->log_offset         = le32_to_cpu(ret->log_offset);
1285
1286         samples = &ret->samples[0];
1287         for (i = 0; i < ret->nr_samples; i++) {
1288                 struct io_sample *s;
1289
1290                 s = __get_sample(samples, ret->log_offset, i);
1291                 s->time         = le64_to_cpu(s->time);
1292                 s->val          = le64_to_cpu(s->val);
1293                 s->__ddir       = le32_to_cpu(s->__ddir);
1294                 s->bs           = le32_to_cpu(s->bs);
1295
1296                 if (ret->log_offset) {
1297                         struct io_sample_offset *so = (void *) s;
1298
1299                         so->offset = le64_to_cpu(so->offset);
1300                 }
1301         }
1302
1303         return ret;
1304 }
1305
1306 int fio_handle_client(struct fio_client *client)
1307 {
1308         struct client_ops *ops = client->ops;
1309         struct fio_net_cmd *cmd;
1310
1311         dprint(FD_NET, "client: handle %s\n", client->hostname);
1312
1313         cmd = fio_net_recv_cmd(client->fd);
1314         if (!cmd)
1315                 return 0;
1316
1317         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1318                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1319
1320         switch (cmd->opcode) {
1321         case FIO_NET_CMD_QUIT:
1322                 if (ops->quit)
1323                         ops->quit(client, cmd);
1324                 remove_client(client);
1325                 free(cmd);
1326                 break;
1327         case FIO_NET_CMD_TEXT:
1328                 convert_text(cmd);
1329                 ops->text(client, cmd);
1330                 free(cmd);
1331                 break;
1332         case FIO_NET_CMD_DU: {
1333                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1334
1335                 convert_dus(&du->dus);
1336                 convert_agg(&du->agg);
1337
1338                 ops->disk_util(client, cmd);
1339                 free(cmd);
1340                 break;
1341                 }
1342         case FIO_NET_CMD_TS: {
1343                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1344
1345                 convert_ts(&p->ts, &p->ts);
1346                 convert_gs(&p->rs, &p->rs);
1347
1348                 ops->thread_status(client, cmd);
1349                 free(cmd);
1350                 break;
1351                 }
1352         case FIO_NET_CMD_GS: {
1353                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1354
1355                 convert_gs(gs, gs);
1356
1357                 ops->group_stats(client, cmd);
1358                 free(cmd);
1359                 break;
1360                 }
1361         case FIO_NET_CMD_ETA: {
1362                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1363
1364                 remove_reply_cmd(client, cmd);
1365                 convert_jobs_eta(je);
1366                 handle_eta(client, cmd);
1367                 free(cmd);
1368                 break;
1369                 }
1370         case FIO_NET_CMD_PROBE:
1371                 remove_reply_cmd(client, cmd);
1372                 ops->probe(client, cmd);
1373                 free(cmd);
1374                 break;
1375         case FIO_NET_CMD_SERVER_START:
1376                 client->state = Client_running;
1377                 if (ops->job_start)
1378                         ops->job_start(client, cmd);
1379                 free(cmd);
1380                 break;
1381         case FIO_NET_CMD_START: {
1382                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1383
1384                 pdu->jobs = le32_to_cpu(pdu->jobs);
1385                 ops->start(client, cmd);
1386                 free(cmd);
1387                 break;
1388                 }
1389         case FIO_NET_CMD_STOP: {
1390                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1391
1392                 convert_stop(cmd);
1393                 client->state = Client_stopped;
1394                 client->error = le32_to_cpu(pdu->error);
1395                 client->signal = le32_to_cpu(pdu->signal);
1396                 ops->stop(client, cmd);
1397                 free(cmd);
1398                 break;
1399                 }
1400         case FIO_NET_CMD_ADD_JOB: {
1401                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1402
1403                 client->thread_number = le32_to_cpu(pdu->thread_number);
1404                 client->groupid = le32_to_cpu(pdu->groupid);
1405
1406                 if (ops->add_job)
1407                         ops->add_job(client, cmd);
1408                 free(cmd);
1409                 break;
1410                 }
1411         case FIO_NET_CMD_IOLOG:
1412                 if (ops->iolog) {
1413                         struct cmd_iolog_pdu *pdu;
1414
1415                         pdu = convert_iolog(cmd);
1416                         ops->iolog(client, pdu);
1417                 }
1418                 free(cmd);
1419                 break;
1420         case FIO_NET_CMD_UPDATE_JOB:
1421                 ops->update_job(client, cmd);
1422                 remove_reply_cmd(client, cmd);
1423                 free(cmd);
1424                 break;
1425         default:
1426                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1427                 free(cmd);
1428                 break;
1429         }
1430
1431         return 1;
1432 }
1433
1434 static void request_client_etas(struct client_ops *ops)
1435 {
1436         struct fio_client *client;
1437         struct flist_head *entry;
1438         struct client_eta *eta;
1439         int skipped = 0;
1440
1441         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1442
1443         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1444         eta->pending = nr_clients;
1445
1446         flist_for_each(entry, &client_list) {
1447                 client = flist_entry(entry, struct fio_client, list);
1448
1449                 if (!flist_empty(&client->eta_list)) {
1450                         skipped++;
1451                         continue;
1452                 }
1453                 if (client->state != Client_running)
1454                         continue;
1455
1456                 assert(!client->eta_in_flight);
1457                 flist_add_tail(&client->eta_list, &eta_list);
1458                 client->eta_in_flight = eta;
1459                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1460                                         (uintptr_t) eta, &client->cmd_list);
1461         }
1462
1463         while (skipped--)
1464                 fio_client_dec_jobs_eta(eta, ops->eta);
1465
1466         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1467 }
1468
1469 static int client_check_cmd_timeout(struct fio_client *client,
1470                                     struct timeval *now)
1471 {
1472         struct fio_net_cmd_reply *reply;
1473         struct flist_head *entry, *tmp;
1474         int ret = 0;
1475
1476         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1477                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1478
1479                 if (mtime_since(&reply->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1480                         continue;
1481
1482                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1483                                                 fio_server_op(reply->opcode));
1484                 flist_del(&reply->list);
1485                 free(reply);
1486                 ret = 1;
1487         }
1488
1489         return flist_empty(&client->cmd_list) && ret;
1490 }
1491
1492 static int fio_check_clients_timed_out(void)
1493 {
1494         struct fio_client *client;
1495         struct flist_head *entry, *tmp;
1496         struct timeval tv;
1497         int ret = 0;
1498
1499         fio_gettime(&tv, NULL);
1500
1501         flist_for_each_safe(entry, tmp, &client_list) {
1502                 client = flist_entry(entry, struct fio_client, list);
1503
1504                 if (flist_empty(&client->cmd_list))
1505                         continue;
1506
1507                 if (!client_check_cmd_timeout(client, &tv))
1508                         continue;
1509
1510                 if (client->ops->timed_out)
1511                         client->ops->timed_out(client);
1512                 else
1513                         log_err("fio: client %s timed out\n", client->hostname);
1514
1515                 remove_client(client);
1516                 ret = 1;
1517         }
1518
1519         return ret;
1520 }
1521
1522 int fio_handle_clients(struct client_ops *ops)
1523 {
1524         struct pollfd *pfds;
1525         int i, ret = 0, retval = 0;
1526
1527         fio_gettime(&eta_tv, NULL);
1528
1529         pfds = malloc(nr_clients * sizeof(struct pollfd));
1530
1531         init_thread_stat(&client_ts);
1532         init_group_run_stat(&client_gs);
1533
1534         while (!exit_backend && nr_clients) {
1535                 struct flist_head *entry, *tmp;
1536                 struct fio_client *client;
1537
1538                 i = 0;
1539                 flist_for_each_safe(entry, tmp, &client_list) {
1540                         client = flist_entry(entry, struct fio_client, list);
1541
1542                         if (!client->sent_job && !client->ops->stay_connected &&
1543                             flist_empty(&client->cmd_list)) {
1544                                 remove_client(client);
1545                                 continue;
1546                         }
1547
1548                         pfds[i].fd = client->fd;
1549                         pfds[i].events = POLLIN;
1550                         i++;
1551                 }
1552
1553                 if (!nr_clients)
1554                         break;
1555
1556                 assert(i == nr_clients);
1557
1558                 do {
1559                         struct timeval tv;
1560
1561                         fio_gettime(&tv, NULL);
1562                         if (mtime_since(&eta_tv, &tv) >= 900) {
1563                                 request_client_etas(ops);
1564                                 memcpy(&eta_tv, &tv, sizeof(tv));
1565
1566                                 if (fio_check_clients_timed_out())
1567                                         break;
1568                         }
1569
1570                         ret = poll(pfds, nr_clients, ops->eta_msec);
1571                         if (ret < 0) {
1572                                 if (errno == EINTR)
1573                                         continue;
1574                                 log_err("fio: poll clients: %s\n", strerror(errno));
1575                                 break;
1576                         } else if (!ret)
1577                                 continue;
1578                 } while (ret <= 0);
1579
1580                 for (i = 0; i < nr_clients; i++) {
1581                         if (!(pfds[i].revents & POLLIN))
1582                                 continue;
1583
1584                         client = find_client_by_fd(pfds[i].fd);
1585                         if (!client) {
1586                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
1587                                 continue;
1588                         }
1589                         if (!fio_handle_client(client)) {
1590                                 log_info("client: host=%s disconnected\n",
1591                                                 client->hostname);
1592                                 remove_client(client);
1593                                 retval = 1;
1594                         } else if (client->error)
1595                                 retval = 1;
1596                         fio_put_client(client);
1597                 }
1598         }
1599
1600         fio_client_json_fini();
1601
1602         free(pfds);
1603         return retval;
1604 }