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