client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <poll.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <sys/socket.h>
  10 #include <sys/un.h>
  11 #include <netinet/in.h>
  12 #include <arpa/inet.h>
  13 #include <netdb.h>
  14 #include <signal.h>
  15 #ifdef CONFIG_ZLIB
  16 #include <zlib.h>
  17 #endif
  18
  19 #include "fio.h"
  20 #include "client.h"
  21 #include "server.h"
  22 #include "flist.h"
  23 #include "hash.h"
  24 #include "verify-state.h"
  25
  26 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  31 static void handle_stop(struct fio_client *client);
  32 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  33
  34 static void convert_text(struct fio_net_cmd *cmd);
  35 static void client_display_thread_status(struct jobs_eta *je);
  36
  37 struct client_ops fio_client_ops = {
  38         .text           = handle_text,
  39         .disk_util      = handle_du,
  40         .thread_status  = handle_ts,
  41         .group_stats    = handle_gs,
  42         .stop           = handle_stop,
  43         .start          = handle_start,
  44         .eta            = client_display_thread_status,
  45         .probe          = handle_probe,
  46         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  47         .client_type    = FIO_CLIENT_TYPE_CLI,
  48 };
  49
  50 static struct timespec eta_ts;
  51
  52 static FLIST_HEAD(client_list);
  53 static FLIST_HEAD(eta_list);
  54
  55 static FLIST_HEAD(arg_list);
  56
  57 struct thread_stat client_ts;
  58 struct group_run_stats client_gs;
  59 int sum_stat_clients;
  60
  61 static int sum_stat_nr;
  62 static struct buf_output allclients;
  63 static struct json_object *root = NULL;
  64 static struct json_object *job_opt_object = NULL;
  65 static struct json_array *clients_array = NULL;
  66 static struct json_array *du_array = NULL;
  67
  68 static int error_clients;
  69
  70 #define FIO_CLIENT_HASH_BITS    7
  71 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  72 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  73 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  74
  75 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *, bool *);
  76
  77 static void fio_client_add_hash(struct fio_client *client)
  78 {
  79         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  80
  81         bucket &= FIO_CLIENT_HASH_MASK;
  82         flist_add(&client->hash_list, &client_hash[bucket]);
  83 }
  84
  85 static void fio_client_remove_hash(struct fio_client *client)
  86 {
  87         if (!flist_empty(&client->hash_list))
  88                 flist_del_init(&client->hash_list);
  89 }
  90
  91 static void fio_init fio_client_hash_init(void)
  92 {
  93         int i;
  94
  95         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  96                 INIT_FLIST_HEAD(&client_hash[i]);
  97 }
  98
  99 static int read_data(int fd, void *data, size_t size)
 100 {
 101         ssize_t ret;
 102
 103         while (size) {
 104                 ret = read(fd, data, size);
 105                 if (ret < 0) {
 106                         if (errno == EAGAIN || errno == EINTR)
 107                                 continue;
 108                         break;
 109                 } else if (!ret)
 110                         break;
 111                 else {
 112                         data += ret;
 113                         size -= ret;
 114                 }
 115         }
 116
 117         if (size)
 118                 return EAGAIN;
 119
 120         return 0;
 121 }
 122
 123 static int read_ini_data(int fd, void *data, size_t size)
 124 {
 125         char *p = data;
 126         int ret = 0;
 127         FILE *fp;
 128         int dupfd;
 129
 130         dupfd = dup(fd);
 131         if (dupfd < 0)
 132                 return errno;
 133
 134         fp = fdopen(dupfd, "r");
 135         if (!fp) {
 136                 ret = errno;
 137                 close(dupfd);
 138                 goto out;
 139         }
 140
 141         while (1) {
 142                 ssize_t len;
 143                 char buf[OPT_LEN_MAX+1], *sub;
 144
 145                 if (!fgets(buf, sizeof(buf), fp)) {
 146                         if (ferror(fp)) {
 147                                 if (errno == EAGAIN || errno == EINTR)
 148                                         continue;
 149                                 ret = errno;
 150                         }
 151                         break;
 152                 }
 153
 154                 sub = fio_option_dup_subs(buf);
 155                 len = strlen(sub);
 156                 if (len + 1 > size) {
 157                         log_err("fio: no space left to read data\n");
 158                         free(sub);
 159                         ret = ENOSPC;
 160                         break;
 161                 }
 162
 163                 memcpy(p, sub, len);
 164                 free(sub);
 165                 p += len;
 166                 *p = '\0';
 167                 size -= len;
 168         }
 169
 170         fclose(fp);
 171 out:
 172         return ret;
 173 }
 174
 175 static void fio_client_json_init(void)
 176 {
 177         char time_buf[32];
 178         time_t time_p;
 179
 180         if (!(output_format & FIO_OUTPUT_JSON))
 181                 return;
 182
 183         time(&time_p);
 184         os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
 185         time_buf[strlen(time_buf) - 1] = '\0';
 186
 187         root = json_create_object();
 188         json_object_add_value_string(root, "fio version", fio_version_string);
 189         json_object_add_value_int(root, "timestamp", time_p);
 190         json_object_add_value_string(root, "time", time_buf);
 191
 192         job_opt_object = json_create_object();
 193         json_object_add_value_object(root, "global options", job_opt_object);
 194         clients_array = json_create_array();
 195         json_object_add_value_array(root, "client_stats", clients_array);
 196         du_array = json_create_array();
 197         json_object_add_value_array(root, "disk_util", du_array);
 198 }
 199
 200 static void fio_client_json_fini(void)
 201 {
 202         struct buf_output out;
 203
 204         if (!root)
 205                 return;
 206
 207         buf_output_init(&out);
 208
 209         __log_buf(&out, "\n");
 210         json_print_object(root, &out);
 211         __log_buf(&out, "\n");
 212         log_info_buf(out.buf, out.buflen);
 213
 214         buf_output_free(&out);
 215
 216         json_free_object(root);
 217         root = NULL;
 218         job_opt_object = NULL;
 219         clients_array = NULL;
 220         du_array = NULL;
 221 }
 222
 223 static struct fio_client *find_client_by_fd(int fd)
 224 {
 225         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 226         struct fio_client *client;
 227         struct flist_head *entry;
 228
 229         flist_for_each(entry, &client_hash[bucket]) {
 230                 client = flist_entry(entry, struct fio_client, hash_list);
 231
 232                 if (client->fd == fd) {
 233                         client->refs++;
 234                         return client;
 235                 }
 236         }
 237
 238         return NULL;
 239 }
 240
 241 void fio_put_client(struct fio_client *client)
 242 {
 243         if (--client->refs)
 244                 return;
 245
 246         log_info_buf(client->buf.buf, client->buf.buflen);
 247         buf_output_free(&client->buf);
 248
 249         free(client->hostname);
 250         if (client->argv)
 251                 free(client->argv);
 252         if (client->name)
 253                 free(client->name);
 254         while (client->nr_files) {
 255                 struct client_file *cf = &client->files[--client->nr_files];
 256
 257                 free(cf->file);
 258         }
 259         if (client->files)
 260                 free(client->files);
 261         if (client->opt_lists)
 262                 free(client->opt_lists);
 263
 264         if (!client->did_stat)
 265                 sum_stat_clients--;
 266
 267         if (client->error)
 268                 error_clients++;
 269
 270         free(client);
 271 }
 272
 273 static int fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 274 {
 275         if (!--eta->pending) {
 276                 eta_fn(&eta->eta);
 277                 free(eta);
 278                 return 0;
 279         }
 280
 281         return 1;
 282 }
 283
 284 static void fio_drain_client_text(struct fio_client *client)
 285 {
 286         do {
 287                 struct fio_net_cmd *cmd = NULL;
 288
 289                 if (fio_server_poll_fd(client->fd, POLLIN, 0))
 290                         cmd = fio_net_recv_cmd(client->fd, false);
 291                 if (!cmd)
 292                         break;
 293
 294                 if (cmd->opcode == FIO_NET_CMD_TEXT) {
 295                         convert_text(cmd);
 296                         client->ops->text(client, cmd);
 297                 }
 298
 299                 free(cmd);
 300         } while (1);
 301 }
 302
 303 static void remove_client(struct fio_client *client)
 304 {
 305         assert(client->refs);
 306
 307         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 308
 309         fio_drain_client_text(client);
 310
 311         if (!flist_empty(&client->list))
 312                 flist_del_init(&client->list);
 313
 314         fio_client_remove_hash(client);
 315
 316         if (!flist_empty(&client->eta_list)) {
 317                 flist_del_init(&client->eta_list);
 318                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 319         }
 320
 321         close(client->fd);
 322         client->fd = -1;
 323
 324         if (client->ops->removed)
 325                 client->ops->removed(client);
 326
 327         nr_clients--;
 328         fio_put_client(client);
 329 }
 330
 331 struct fio_client *fio_get_client(struct fio_client *client)
 332 {
 333         client->refs++;
 334         return client;
 335 }
 336
 337 static void __fio_client_add_cmd_option(struct fio_client *client,
 338                                         const char *opt)
 339 {
 340         int index;
 341
 342         index = client->argc++;
 343         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 344         client->argv[index] = strdup(opt);
 345         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 346 }
 347
 348 void fio_client_add_cmd_option(void *cookie, const char *opt)
 349 {
 350         struct fio_client *client = cookie;
 351         struct flist_head *entry;
 352
 353         if (!client || !opt)
 354                 return;
 355
 356         __fio_client_add_cmd_option(client, opt);
 357
 358         /*
 359          * Duplicate arguments to shared client group
 360          */
 361         flist_for_each(entry, &arg_list) {
 362                 client = flist_entry(entry, struct fio_client, arg_list);
 363
 364                 __fio_client_add_cmd_option(client, opt);
 365         }
 366 }
 367
 368 static struct fio_client *get_new_client(void)
 369 {
 370         struct fio_client *client;
 371
 372         client = malloc(sizeof(*client));
 373         memset(client, 0, sizeof(*client));
 374
 375         INIT_FLIST_HEAD(&client->list);
 376         INIT_FLIST_HEAD(&client->hash_list);
 377         INIT_FLIST_HEAD(&client->arg_list);
 378         INIT_FLIST_HEAD(&client->eta_list);
 379         INIT_FLIST_HEAD(&client->cmd_list);
 380
 381         buf_output_init(&client->buf);
 382
 383         return client;
 384 }
 385
 386 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 387                                            const char *hostname, int type,
 388                                            int port)
 389 {
 390         struct fio_client *client;
 391
 392         client = get_new_client();
 393
 394         if (type == Fio_client_socket)
 395                 client->is_sock = true;
 396         else {
 397                 int ipv6;
 398
 399                 ipv6 = type == Fio_client_ipv6;
 400                 if (fio_server_parse_host(hostname, ipv6,
 401                                                 &client->addr.sin_addr,
 402                                                 &client->addr6.sin6_addr))
 403                         goto err;
 404
 405                 client->port = port;
 406         }
 407
 408         client->fd = -1;
 409         client->ops = ops;
 410         client->refs = 1;
 411         client->type = ops->client_type;
 412         client->hostname = strdup(hostname);
 413
 414         __fio_client_add_cmd_option(client, "fio");
 415
 416         flist_add(&client->list, &client_list);
 417         nr_clients++;
 418         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 419         return client;
 420 err:
 421         free(client);
 422         return NULL;
 423 }
 424
 425 int fio_client_add_ini_file(void *cookie, const char *ini_file, bool remote)
 426 {
 427         struct fio_client *client = cookie;
 428         struct client_file *cf;
 429         size_t new_size;
 430         void *new_files;
 431
 432         if (!client)
 433                 return 1;
 434
 435         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 436
 437         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 438         new_files = realloc(client->files, new_size);
 439         if (!new_files)
 440                 return 1;
 441
 442         client->files = new_files;
 443         cf = &client->files[client->nr_files];
 444         cf->file = strdup(ini_file);
 445         cf->remote = remote;
 446         client->nr_files++;
 447         return 0;
 448 }
 449
 450 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 451 {
 452         struct fio_client *existing = *cookie;
 453         struct fio_client *client;
 454
 455         if (existing) {
 456                 /*
 457                  * We always add our "exec" name as the option, hence 1
 458                  * means empty.
 459                  */
 460                 if (existing->argc == 1)
 461                         flist_add_tail(&existing->arg_list, &arg_list);
 462                 else {
 463                         while (!flist_empty(&arg_list))
 464                                 flist_del_init(arg_list.next);
 465                 }
 466         }
 467
 468         client = get_new_client();
 469
 470         if (fio_server_parse_string(hostname, &client->hostname,
 471                                         &client->is_sock, &client->port,
 472                                         &client->addr.sin_addr,
 473                                         &client->addr6.sin6_addr,
 474                                         &client->ipv6)) {
 475                 fio_put_client(client);
 476                 return -1;
 477         }
 478
 479         client->fd = -1;
 480         client->ops = ops;
 481         client->refs = 1;
 482         client->type = ops->client_type;
 483
 484         __fio_client_add_cmd_option(client, "fio");
 485
 486         flist_add(&client->list, &client_list);
 487         nr_clients++;
 488         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 489         *cookie = client;
 490         return 0;
 491 }
 492
 493 static const char *server_name(struct fio_client *client, char *buf,
 494                                size_t bufsize)
 495 {
 496         const char *from;
 497
 498         if (client->ipv6)
 499                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 500         else if (client->is_sock)
 501                 from = "sock";
 502         else
 503                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 504
 505         return from;
 506 }
 507
 508 static void probe_client(struct fio_client *client)
 509 {
 510         struct cmd_client_probe_pdu pdu;
 511         const char *sname;
 512         uint64_t tag;
 513         char buf[64];
 514
 515         dprint(FD_NET, "client: send probe\n");
 516
 517 #ifdef CONFIG_ZLIB
 518         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 519 #else
 520         pdu.flags = 0;
 521 #endif
 522
 523         sname = server_name(client, buf, sizeof(buf));
 524         memset(pdu.server, 0, sizeof(pdu.server));
 525         snprintf((char *) pdu.server, sizeof(pdu.server), "%s", sname);
 526
 527         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 528 }
 529
 530 static int fio_client_connect_ip(struct fio_client *client)
 531 {
 532         struct sockaddr *addr;
 533         socklen_t socklen;
 534         int fd, domain;
 535
 536         if (client->ipv6) {
 537                 client->addr6.sin6_family = AF_INET6;
 538                 client->addr6.sin6_port = htons(client->port);
 539                 domain = AF_INET6;
 540                 addr = (struct sockaddr *) &client->addr6;
 541                 socklen = sizeof(client->addr6);
 542         } else {
 543                 client->addr.sin_family = AF_INET;
 544                 client->addr.sin_port = htons(client->port);
 545                 domain = AF_INET;
 546                 addr = (struct sockaddr *) &client->addr;
 547                 socklen = sizeof(client->addr);
 548         }
 549
 550         fd = socket(domain, SOCK_STREAM, 0);
 551         if (fd < 0) {
 552                 int ret = -errno;
 553
 554                 log_err("fio: socket: %s\n", strerror(errno));
 555                 return ret;
 556         }
 557
 558         if (connect(fd, addr, socklen) < 0) {
 559                 int ret = -errno;
 560
 561                 log_err("fio: connect: %s\n", strerror(errno));
 562                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 563                                                                 client->port);
 564                 close(fd);
 565                 return ret;
 566         }
 567
 568         return fd;
 569 }
 570
 571 static int fio_client_connect_sock(struct fio_client *client)
 572 {
 573         struct sockaddr_un *addr = &client->addr_un;
 574         socklen_t len;
 575         int fd;
 576
 577         memset(addr, 0, sizeof(*addr));
 578         addr->sun_family = AF_UNIX;
 579         snprintf(addr->sun_path, sizeof(addr->sun_path), "%s",
 580                  client->hostname);
 581
 582         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 583         if (fd < 0) {
 584                 int ret = -errno;
 585
 586                 log_err("fio: socket: %s\n", strerror(errno));
 587                 return ret;
 588         }
 589
 590         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 591         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 592                 int ret = -errno;
 593
 594                 log_err("fio: connect; %s\n", strerror(errno));
 595                 close(fd);
 596                 return ret;
 597         }
 598
 599         return fd;
 600 }
 601
 602 int fio_client_connect(struct fio_client *client)
 603 {
 604         int fd;
 605
 606         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 607
 608         if (client->is_sock)
 609                 fd = fio_client_connect_sock(client);
 610         else
 611                 fd = fio_client_connect_ip(client);
 612
 613         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 614
 615         if (fd < 0)
 616                 return fd;
 617
 618         client->fd = fd;
 619         fio_client_add_hash(client);
 620         client->state = Client_connected;
 621
 622         probe_client(client);
 623         return 0;
 624 }
 625
 626 int fio_client_terminate(struct fio_client *client)
 627 {
 628         return fio_net_send_quit(client->fd);
 629 }
 630
 631 static void fio_clients_terminate(void)
 632 {
 633         struct flist_head *entry;
 634         struct fio_client *client;
 635
 636         dprint(FD_NET, "client: terminate clients\n");
 637
 638         flist_for_each(entry, &client_list) {
 639                 client = flist_entry(entry, struct fio_client, list);
 640                 fio_client_terminate(client);
 641         }
 642 }
 643
 644 static void sig_int(int sig)
 645 {
 646         dprint(FD_NET, "client: got signal %d\n", sig);
 647         fio_clients_terminate();
 648 }
 649
 650 static void client_signal_handler(void)
 651 {
 652         struct sigaction act;
 653
 654         memset(&act, 0, sizeof(act));
 655         act.sa_handler = sig_int;
 656         act.sa_flags = SA_RESTART;
 657         sigaction(SIGINT, &act, NULL);
 658
 659         memset(&act, 0, sizeof(act));
 660         act.sa_handler = sig_int;
 661         act.sa_flags = SA_RESTART;
 662         sigaction(SIGTERM, &act, NULL);
 663
 664 /* Windows uses SIGBREAK as a quit signal from other applications */
 665 #ifdef WIN32
 666         memset(&act, 0, sizeof(act));
 667         act.sa_handler = sig_int;
 668         act.sa_flags = SA_RESTART;
 669         sigaction(SIGBREAK, &act, NULL);
 670 #endif
 671
 672         memset(&act, 0, sizeof(act));
 673         act.sa_handler = sig_show_status;
 674         act.sa_flags = SA_RESTART;
 675         sigaction(SIGUSR1, &act, NULL);
 676 }
 677
 678 static int send_client_cmd_line(struct fio_client *client)
 679 {
 680         struct cmd_single_line_pdu *cslp;
 681         struct cmd_line_pdu *clp;
 682         unsigned long offset;
 683         unsigned int *lens;
 684         void *pdu;
 685         size_t mem;
 686         int i, ret;
 687
 688         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 689
 690         lens = malloc(client->argc * sizeof(unsigned int));
 691
 692         /*
 693          * Find out how much mem we need
 694          */
 695         for (i = 0, mem = 0; i < client->argc; i++) {
 696                 lens[i] = strlen(client->argv[i]) + 1;
 697                 mem += lens[i];
 698         }
 699
 700         /*
 701          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 702          */
 703         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 704
 705         pdu = malloc(mem);
 706         clp = pdu;
 707         offset = sizeof(*clp);
 708
 709         for (i = 0; i < client->argc; i++) {
 710                 uint16_t arg_len = lens[i];
 711
 712                 cslp = pdu + offset;
 713                 strcpy((char *) cslp->text, client->argv[i]);
 714                 cslp->len = cpu_to_le16(arg_len);
 715                 offset += sizeof(*cslp) + arg_len;
 716         }
 717
 718         free(lens);
 719         clp->lines = cpu_to_le16(client->argc);
 720         clp->client_type = __cpu_to_le16(client->type);
 721         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 722         free(pdu);
 723         return ret;
 724 }
 725
 726 int fio_clients_connect(void)
 727 {
 728         struct fio_client *client;
 729         struct flist_head *entry, *tmp;
 730         int ret;
 731
 732 #ifdef WIN32
 733         WSADATA wsd;
 734         WSAStartup(MAKEWORD(2, 2), &wsd);
 735 #endif
 736
 737         dprint(FD_NET, "client: connect all\n");
 738
 739         client_signal_handler();
 740
 741         flist_for_each_safe(entry, tmp, &client_list) {
 742                 client = flist_entry(entry, struct fio_client, list);
 743
 744                 ret = fio_client_connect(client);
 745                 if (ret) {
 746                         remove_client(client);
 747                         continue;
 748                 }
 749
 750                 if (client->argc > 1)
 751                         send_client_cmd_line(client);
 752         }
 753
 754         return !nr_clients;
 755 }
 756
 757 int fio_start_client(struct fio_client *client)
 758 {
 759         dprint(FD_NET, "client: start %s\n", client->hostname);
 760         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 761 }
 762
 763 int fio_start_all_clients(void)
 764 {
 765         struct fio_client *client;
 766         struct flist_head *entry, *tmp;
 767         int ret;
 768
 769         dprint(FD_NET, "client: start all\n");
 770
 771         fio_client_json_init();
 772
 773         flist_for_each_safe(entry, tmp, &client_list) {
 774                 client = flist_entry(entry, struct fio_client, list);
 775
 776                 ret = fio_start_client(client);
 777                 if (ret) {
 778                         remove_client(client);
 779                         continue;
 780                 }
 781         }
 782
 783         return flist_empty(&client_list);
 784 }
 785
 786 static int __fio_client_send_remote_ini(struct fio_client *client,
 787                                         const char *filename)
 788 {
 789         struct cmd_load_file_pdu *pdu;
 790         size_t p_size;
 791         int ret;
 792
 793         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 794
 795         p_size = sizeof(*pdu) + strlen(filename) + 1;
 796         pdu = malloc(p_size);
 797         memset(pdu, 0, p_size);
 798         pdu->name_len = strlen(filename);
 799         strcpy((char *) pdu->file, filename);
 800         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 801
 802         client->sent_job = true;
 803         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 804         free(pdu);
 805         return ret;
 806 }
 807
 808 /*
 809  * Send file contents to server backend. We could use sendfile(), but to remain
 810  * more portable lets just read/write the darn thing.
 811  */
 812 static int __fio_client_send_local_ini(struct fio_client *client,
 813                                        const char *filename)
 814 {
 815         struct cmd_job_pdu *pdu;
 816         size_t p_size;
 817         struct stat sb;
 818         char *p;
 819         void *buf;
 820         off_t len;
 821         int fd, ret;
 822
 823         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 824
 825         fd = open(filename, O_RDONLY);
 826         if (fd < 0) {
 827                 ret = -errno;
 828                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 829                 return ret;
 830         }
 831
 832         if (fstat(fd, &sb) < 0) {
 833                 ret = -errno;
 834                 log_err("fio: job file stat: %s\n", strerror(errno));
 835                 close(fd);
 836                 return ret;
 837         }
 838
 839         /*
 840          * Add extra space for variable expansion, but doesn't guarantee.
 841          */
 842         sb.st_size += OPT_LEN_MAX;
 843         p_size = sb.st_size + sizeof(*pdu);
 844         pdu = malloc(p_size);
 845         buf = pdu->buf;
 846
 847         len = sb.st_size;
 848         p = buf;
 849         if (read_ini_data(fd, p, len)) {
 850                 log_err("fio: failed reading job file %s\n", filename);
 851                 close(fd);
 852                 free(pdu);
 853                 return 1;
 854         }
 855
 856         pdu->buf_len = __cpu_to_le32(sb.st_size);
 857         pdu->client_type = cpu_to_le32(client->type);
 858
 859         client->sent_job = true;
 860         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 861         free(pdu);
 862         close(fd);
 863         return ret;
 864 }
 865
 866 int fio_client_send_ini(struct fio_client *client, const char *filename,
 867                         bool remote)
 868 {
 869         int ret;
 870
 871         if (!remote)
 872                 ret = __fio_client_send_local_ini(client, filename);
 873         else
 874                 ret = __fio_client_send_remote_ini(client, filename);
 875
 876         if (!ret)
 877                 client->sent_job = true;
 878
 879         return ret;
 880 }
 881
 882 static int fio_client_send_cf(struct fio_client *client,
 883                               struct client_file *cf)
 884 {
 885         return fio_client_send_ini(client, cf->file, cf->remote);
 886 }
 887
 888 int fio_clients_send_ini(const char *filename)
 889 {
 890         struct fio_client *client;
 891         struct flist_head *entry, *tmp;
 892
 893         flist_for_each_safe(entry, tmp, &client_list) {
 894                 bool failed = false;
 895
 896                 client = flist_entry(entry, struct fio_client, list);
 897
 898                 if (client->nr_files) {
 899                         int i;
 900
 901                         for (i = 0; i < client->nr_files; i++) {
 902                                 struct client_file *cf;
 903
 904                                 cf = &client->files[i];
 905
 906                                 if (fio_client_send_cf(client, cf)) {
 907                                         failed = true;
 908                                         remove_client(client);
 909                                         break;
 910                                 }
 911                         }
 912                 }
 913                 if (client->sent_job || failed)
 914                         continue;
 915                 if (!filename || fio_client_send_ini(client, filename, 0))
 916                         remove_client(client);
 917         }
 918
 919         return !nr_clients;
 920 }
 921
 922 int fio_client_update_options(struct fio_client *client,
 923                               struct thread_options *o, uint64_t *tag)
 924 {
 925         struct cmd_add_job_pdu pdu;
 926
 927         pdu.thread_number = cpu_to_le32(client->thread_number);
 928         pdu.groupid = cpu_to_le32(client->groupid);
 929         convert_thread_options_to_net(&pdu.top, o);
 930
 931         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 932 }
 933
 934 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 935 {
 936         dst->max_val    = le64_to_cpu(src->max_val);
 937         dst->min_val    = le64_to_cpu(src->min_val);
 938         dst->samples    = le64_to_cpu(src->samples);
 939
 940         /*
 941          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 942          */
 943         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 944         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 945 }
 946
 947 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 948 {
 949         int i, j, k;
 950
 951         dst->error              = le32_to_cpu(src->error);
 952         dst->thread_number      = le32_to_cpu(src->thread_number);
 953         dst->groupid            = le32_to_cpu(src->groupid);
 954         dst->pid                = le32_to_cpu(src->pid);
 955         dst->members            = le32_to_cpu(src->members);
 956         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 957         dst->ioprio             = le32_to_cpu(src->ioprio);
 958         dst->disable_prio_stat  = le32_to_cpu(src->disable_prio_stat);
 959
 960         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 961                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 962                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 963                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 964                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 965                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 966         }
 967         convert_io_stat(&dst->sync_stat, &src->sync_stat);
 968
 969         dst->usr_time           = le64_to_cpu(src->usr_time);
 970         dst->sys_time           = le64_to_cpu(src->sys_time);
 971         dst->ctx                = le64_to_cpu(src->ctx);
 972         dst->minf               = le64_to_cpu(src->minf);
 973         dst->majf               = le64_to_cpu(src->majf);
 974         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 975         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 976         dst->slat_percentiles   = le32_to_cpu(src->slat_percentiles);
 977         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 978
 979         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 980                 fio_fp64_t *fps = &src->percentile_list[i];
 981                 fio_fp64_t *fpd = &dst->percentile_list[i];
 982
 983                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 984         }
 985
 986         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 987                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 988                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 989                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 990         }
 991
 992         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 993                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
 994         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 995                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
 996         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 997                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
 998
 999         for (i = 0; i < FIO_LAT_CNT; i++)
1000                 for (j = 0; j < DDIR_RWDIR_CNT; j++)
1001                         for (k = 0; k < FIO_IO_U_PLAT_NR; k++)
1002                                 dst->io_u_plat[i][j][k] = le64_to_cpu(src->io_u_plat[i][j][k]);
1003
1004         for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1005                 dst->io_u_sync_plat[j] = le64_to_cpu(src->io_u_sync_plat[j]);
1006
1007         for (i = 0; i < DDIR_RWDIR_SYNC_CNT; i++)
1008                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
1009
1010         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1011                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
1012                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
1013         }
1014
1015         dst->total_submit       = le64_to_cpu(src->total_submit);
1016         dst->total_complete     = le64_to_cpu(src->total_complete);
1017         dst->nr_zone_resets     = le64_to_cpu(src->nr_zone_resets);
1018
1019         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1020                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
1021                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
1022         }
1023
1024         dst->total_run_time     = le64_to_cpu(src->total_run_time);
1025         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
1026         dst->total_err_count    = le64_to_cpu(src->total_err_count);
1027         dst->first_error        = le32_to_cpu(src->first_error);
1028         dst->kb_base            = le32_to_cpu(src->kb_base);
1029         dst->unit_base          = le32_to_cpu(src->unit_base);
1030
1031         dst->sig_figs           = le32_to_cpu(src->sig_figs);
1032
1033         dst->latency_depth      = le32_to_cpu(src->latency_depth);
1034         dst->latency_target     = le64_to_cpu(src->latency_target);
1035         dst->latency_window     = le64_to_cpu(src->latency_window);
1036         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
1037
1038         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
1039         for (i = 0; i < dst->nr_block_infos; i++)
1040                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
1041
1042         dst->ss_dur             = le64_to_cpu(src->ss_dur);
1043         dst->ss_state           = le32_to_cpu(src->ss_state);
1044         dst->ss_head            = le32_to_cpu(src->ss_head);
1045         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
1046         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
1047         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
1048         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
1049
1050         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1051                 dst->nr_clat_prio[i] = le32_to_cpu(src->nr_clat_prio[i]);
1052                 for (j = 0; j < dst->nr_clat_prio[i]; j++) {
1053                         for (k = 0; k < FIO_IO_U_PLAT_NR; k++)
1054                                 dst->clat_prio[i][j].io_u_plat[k] =
1055                                         le64_to_cpu(src->clat_prio[i][j].io_u_plat[k]);
1056                         convert_io_stat(&dst->clat_prio[i][j].clat_stat,
1057                                         &src->clat_prio[i][j].clat_stat);
1058                         dst->clat_prio[i][j].ioprio =
1059                                 le32_to_cpu(dst->clat_prio[i][j].ioprio);
1060                 }
1061         }
1062
1063         if (dst->ss_state & FIO_SS_DATA) {
1064                 for (i = 0; i < dst->ss_dur; i++ ) {
1065                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
1066                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
1067                 }
1068         }
1069
1070         dst->cachehit           = le64_to_cpu(src->cachehit);
1071         dst->cachemiss          = le64_to_cpu(src->cachemiss);
1072 }
1073
1074 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
1075 {
1076         int i;
1077
1078         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1079                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
1080                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
1081                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
1082                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
1083                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
1084                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
1085         }
1086
1087         dst->kb_base    = le32_to_cpu(src->kb_base);
1088         dst->unit_base  = le32_to_cpu(src->unit_base);
1089         dst->sig_figs   = le32_to_cpu(src->sig_figs);
1090         dst->groupid    = le32_to_cpu(src->groupid);
1091         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
1092 }
1093
1094 static void json_object_add_client_info(struct json_object *obj,
1095                                         struct fio_client *client)
1096 {
1097         const char *hostname = client->hostname ? client->hostname : "";
1098
1099         json_object_add_value_string(obj, "hostname", hostname);
1100         json_object_add_value_int(obj, "port", client->port);
1101 }
1102
1103 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1104 {
1105         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1106         struct flist_head *opt_list = NULL;
1107         struct json_object *tsobj;
1108
1109         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1110                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1111
1112         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, &client->buf);
1113         client->did_stat = true;
1114         if (tsobj) {
1115                 json_object_add_client_info(tsobj, client);
1116                 json_array_add_value_object(clients_array, tsobj);
1117         }
1118
1119         if (sum_stat_clients <= 1)
1120                 return;
1121
1122         sum_thread_stats(&client_ts, &p->ts);
1123         sum_group_stats(&client_gs, &p->rs);
1124
1125         client_ts.members++;
1126         client_ts.thread_number = p->ts.thread_number;
1127         client_ts.groupid = p->ts.groupid;
1128         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1129         client_ts.sig_figs = p->ts.sig_figs;
1130
1131         if (++sum_stat_nr == sum_stat_clients) {
1132                 strcpy(client_ts.name, "All clients");
1133                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, &allclients);
1134                 if (tsobj) {
1135                         json_object_add_client_info(tsobj, client);
1136                         json_array_add_value_object(clients_array, tsobj);
1137                 }
1138         }
1139 }
1140
1141 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1142 {
1143         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1144
1145         if (output_format & FIO_OUTPUT_NORMAL)
1146                 show_group_stats(gs, &client->buf);
1147 }
1148
1149 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1150 {
1151         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1152
1153         pdu->global = le16_to_cpu(pdu->global);
1154         pdu->truncated = le16_to_cpu(pdu->truncated);
1155         pdu->groupid = le32_to_cpu(pdu->groupid);
1156
1157         if (pdu->global) {
1158                 if (!job_opt_object)
1159                         return;
1160
1161                 json_object_add_value_string(job_opt_object,
1162                                              (const char *)pdu->name,
1163                                              (const char *)pdu->value);
1164         } else if (client->opt_lists) {
1165                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1166                 struct print_option *p;
1167
1168                 p = malloc(sizeof(*p));
1169                 p->name = strdup((const char *)pdu->name);
1170                 p->value = pdu->value[0] ? strdup((const char *)pdu->value) :
1171                         NULL;
1172                 flist_add_tail(&p->list, opt_list);
1173         }
1174 }
1175
1176 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1177 {
1178         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1179         const char *buf = (const char *) pdu->buf;
1180         const char *name;
1181         int fio_unused ret;
1182         struct buf_output out;
1183
1184         buf_output_init(&out);
1185
1186         name = client->name ? client->name : client->hostname;
1187
1188         if (!client->skip_newline && !(output_format & FIO_OUTPUT_TERSE))
1189                 __log_buf(&out, "<%s> ", name);
1190         __log_buf(&out, "%s", buf);
1191         log_info_buf(out.buf, out.buflen);
1192         buf_output_free(&out);
1193         client->skip_newline = strchr(buf, '\n') == NULL;
1194 }
1195
1196 static void convert_agg(struct disk_util_agg *agg)
1197 {
1198         int i;
1199
1200         for (i = 0; i < 2; i++) {
1201                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1202                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1203                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1204                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1205         }
1206
1207         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1208         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1209         agg->slavecount         = le32_to_cpu(agg->slavecount);
1210         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1211 }
1212
1213 static void convert_dus(struct disk_util_stat *dus)
1214 {
1215         int i;
1216
1217         for (i = 0; i < 2; i++) {
1218                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1219                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1220                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1221                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1222         }
1223
1224         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1225         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1226         dus->s.msec             = le64_to_cpu(dus->s.msec);
1227 }
1228
1229 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1230 {
1231         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1232
1233         if (!client->disk_stats_shown)
1234                 client->disk_stats_shown = true;
1235
1236         if (output_format & FIO_OUTPUT_JSON) {
1237                 struct json_object *duobj;
1238
1239                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1240                 duobj = json_array_last_value_object(du_array);
1241                 json_object_add_client_info(duobj, client);
1242         }
1243         if (output_format & FIO_OUTPUT_NORMAL) {
1244                 __log_buf(&client->buf, "\nDisk stats (read/write):\n");
1245                 print_disk_util(&du->dus, &du->agg, 0, &client->buf);
1246         }
1247         if (output_format & FIO_OUTPUT_TERSE && terse_version >= 3) {
1248                 print_disk_util(&du->dus, &du->agg, 1, &client->buf);
1249                 __log_buf(&client->buf, "\n");
1250         }
1251 }
1252
1253 static void convert_jobs_eta(struct jobs_eta *je)
1254 {
1255         int i;
1256
1257         je->nr_running          = le32_to_cpu(je->nr_running);
1258         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1259         je->nr_pending          = le32_to_cpu(je->nr_pending);
1260         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1261         je->files_open          = le32_to_cpu(je->files_open);
1262
1263         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1264                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1265                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1266                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1267                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1268                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1269                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1270         }
1271
1272         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1273         je->eta_sec             = le64_to_cpu(je->eta_sec);
1274         je->nr_threads          = le32_to_cpu(je->nr_threads);
1275         je->is_pow2             = le32_to_cpu(je->is_pow2);
1276         je->unit_base           = le32_to_cpu(je->unit_base);
1277         je->sig_figs            = le32_to_cpu(je->sig_figs);
1278 }
1279
1280 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1281 {
1282         int i;
1283
1284         dst->nr_running         += je->nr_running;
1285         dst->nr_ramp            += je->nr_ramp;
1286         dst->nr_pending         += je->nr_pending;
1287         dst->nr_setting_up      += je->nr_setting_up;
1288         dst->files_open         += je->files_open;
1289
1290         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1291                 dst->m_rate[i]  += je->m_rate[i];
1292                 dst->t_rate[i]  += je->t_rate[i];
1293                 dst->m_iops[i]  += je->m_iops[i];
1294                 dst->t_iops[i]  += je->t_iops[i];
1295                 dst->rate[i]    += je->rate[i];
1296                 dst->iops[i]    += je->iops[i];
1297         }
1298
1299         dst->elapsed_sec        += je->elapsed_sec;
1300
1301         if (je->eta_sec > dst->eta_sec)
1302                 dst->eta_sec = je->eta_sec;
1303
1304         dst->nr_threads         += je->nr_threads;
1305
1306         /*
1307          * This wont be correct for multiple strings, but at least it
1308          * works for the basic cases.
1309          */
1310         strcpy((char *) dst->run_str, (char *) je->run_str);
1311 }
1312
1313 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1314 {
1315         struct fio_net_cmd_reply *reply = NULL;
1316         struct flist_head *entry;
1317
1318         flist_for_each(entry, &client->cmd_list) {
1319                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1320
1321                 if (cmd->tag == (uintptr_t) reply)
1322                         break;
1323
1324                 reply = NULL;
1325         }
1326
1327         if (!reply) {
1328                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1329                 return false;
1330         }
1331
1332         flist_del(&reply->list);
1333         cmd->tag = reply->saved_tag;
1334         free(reply);
1335         return true;
1336 }
1337
1338 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1339 {
1340         do {
1341                 struct fio_net_cmd_reply *reply = NULL;
1342                 struct flist_head *entry;
1343
1344                 flist_for_each(entry, &client->cmd_list) {
1345                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1346
1347                         if (tag == (uintptr_t) reply)
1348                                 break;
1349
1350                         reply = NULL;
1351                 }
1352
1353                 if (!reply)
1354                         break;
1355
1356                 usleep(1000);
1357         } while (1);
1358
1359         return 0;
1360 }
1361
1362 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1363 {
1364         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1365         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1366
1367         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1368
1369         assert(client->eta_in_flight == eta);
1370
1371         client->eta_in_flight = NULL;
1372         flist_del_init(&client->eta_list);
1373         client->eta_timeouts = 0;
1374
1375         if (client->ops->jobs_eta)
1376                 client->ops->jobs_eta(client, je);
1377
1378         fio_client_sum_jobs_eta(&eta->eta, je);
1379         fio_client_dec_jobs_eta(eta, client->ops->eta);
1380 }
1381
1382 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1383                                       uint64_t sample_size)
1384 {
1385         struct io_sample *s;
1386         int log_offset;
1387         uint64_t i, j, nr_samples;
1388         struct io_u_plat_entry *entry;
1389         uint64_t *io_u_plat;
1390
1391         int stride = 1 << hist_coarseness;
1392
1393         if (!sample_size)
1394                 return;
1395
1396         s = __get_sample(samples, 0, 0);
1397         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1398
1399         nr_samples = sample_size / __log_entry_sz(log_offset);
1400
1401         for (i = 0; i < nr_samples; i++) {
1402
1403                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1404                         i * sizeof(struct io_u_plat_entry));
1405
1406                 entry = s->data.plat_entry;
1407                 io_u_plat = entry->io_u_plat;
1408
1409                 fprintf(f, "%lu, %u, %llu, ", (unsigned long) s->time,
1410                                                 io_sample_ddir(s), (unsigned long long) s->bs);
1411                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1412                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1413                 }
1414                 fprintf(f, "%llu\n", (unsigned long long)
1415                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1416
1417         }
1418 }
1419
1420 static int fio_client_handle_iolog(struct fio_client *client,
1421                                    struct fio_net_cmd *cmd)
1422 {
1423         struct cmd_iolog_pdu *pdu = NULL;
1424         bool store_direct;
1425         char *log_pathname = NULL;
1426         int ret = 0;
1427
1428         pdu = convert_iolog(cmd, &store_direct);
1429         if (!pdu) {
1430                 log_err("fio: failed converting IO log\n");
1431                 ret = 1;
1432                 goto out;
1433         }
1434
1435         /* allocate buffer big enough for next sprintf() call */
1436         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1437                         strlen(client->hostname));
1438         if (!log_pathname) {
1439                 log_err("fio: memory allocation of unique pathname failed\n");
1440                 ret = -1;
1441                 goto out;
1442         }
1443         /* generate a unique pathname for the log file using hostname */
1444         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1445
1446         if (store_direct) {
1447                 ssize_t wrote;
1448                 size_t sz;
1449                 int fd;
1450
1451                 fd = open((const char *) log_pathname,
1452                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1453                 if (fd < 0) {
1454                         log_err("fio: open log %s: %s\n",
1455                                 log_pathname, strerror(errno));
1456                         ret = 1;
1457                         goto out;
1458                 }
1459
1460                 sz = cmd->pdu_len - sizeof(*pdu);
1461                 wrote = write(fd, pdu->samples, sz);
1462                 close(fd);
1463
1464                 if (wrote != sz) {
1465                         log_err("fio: short write on compressed log\n");
1466                         ret = 1;
1467                         goto out;
1468                 }
1469
1470                 ret = 0;
1471         } else {
1472                 FILE *f;
1473                 f = fopen((const char *) log_pathname, "w");
1474                 if (!f) {
1475                         log_err("fio: fopen log %s : %s\n",
1476                                 log_pathname, strerror(errno));
1477                         ret = 1;
1478                         goto out;
1479                 }
1480
1481                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1482                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1483                                            pdu->nr_samples * sizeof(struct io_sample));
1484                 } else {
1485                         flush_samples(f, pdu->samples,
1486                                         pdu->nr_samples * sizeof(struct io_sample));
1487                 }
1488                 fclose(f);
1489                 ret = 0;
1490         }
1491
1492 out:
1493         if (pdu && pdu != (void *) cmd->payload)
1494                 free(pdu);
1495
1496         if (log_pathname)
1497                 free(log_pathname);
1498
1499         return ret;
1500 }
1501
1502 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1503 {
1504         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1505         const char *os, *arch;
1506         char bit[16];
1507
1508         os = fio_get_os_string(probe->os);
1509         if (!os)
1510                 os = "unknown";
1511
1512         arch = fio_get_arch_string(probe->arch);
1513         if (!arch)
1514                 os = "unknown";
1515
1516         sprintf(bit, "%d-bit", probe->bpp * 8);
1517         probe->flags = le64_to_cpu(probe->flags);
1518
1519         if (output_format & FIO_OUTPUT_NORMAL) {
1520                 log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1521                         probe->hostname, probe->bigendian, bit, os, arch,
1522                         probe->fio_version, (unsigned long) probe->flags);
1523         }
1524
1525         if (!client->name)
1526                 client->name = strdup((char *) probe->hostname);
1527 }
1528
1529 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1530 {
1531         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1532
1533         client->state = Client_started;
1534         client->jobs = le32_to_cpu(pdu->jobs);
1535         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1536
1537         if (client->jobs) {
1538                 int i;
1539
1540                 if (client->opt_lists)
1541                         free(client->opt_lists);
1542
1543                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1544                 for (i = 0; i < client->jobs; i++)
1545                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1546         }
1547
1548         sum_stat_clients += client->nr_stat;
1549 }
1550
1551 static void handle_stop(struct fio_client *client)
1552 {
1553         if (client->error)
1554                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1555 }
1556
1557 static void convert_stop(struct fio_net_cmd *cmd)
1558 {
1559         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1560
1561         pdu->error = le32_to_cpu(pdu->error);
1562 }
1563
1564 static void convert_text(struct fio_net_cmd *cmd)
1565 {
1566         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1567
1568         pdu->level      = le32_to_cpu(pdu->level);
1569         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1570         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1571         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1572 }
1573
1574 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1575                                               struct cmd_iolog_pdu *pdu)
1576 {
1577 #ifdef CONFIG_ZLIB
1578         struct cmd_iolog_pdu *ret;
1579         z_stream stream;
1580         uint64_t nr_samples;
1581         size_t total;
1582         char *p;
1583
1584         stream.zalloc = Z_NULL;
1585         stream.zfree = Z_NULL;
1586         stream.opaque = Z_NULL;
1587         stream.avail_in = 0;
1588         stream.next_in = Z_NULL;
1589
1590         if (inflateInit(&stream) != Z_OK)
1591                 return NULL;
1592
1593         /*
1594          * Get header first, it's not compressed
1595          */
1596         nr_samples = le64_to_cpu(pdu->nr_samples);
1597
1598         if (pdu->log_type == IO_LOG_TYPE_HIST)
1599                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1600                                         sizeof(struct io_u_plat_entry));
1601         else
1602                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1603         ret = malloc(total + sizeof(*pdu));
1604         ret->nr_samples = nr_samples;
1605
1606         memcpy(ret, pdu, sizeof(*pdu));
1607
1608         p = (char *) ret + sizeof(*pdu);
1609
1610         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1611         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1612         while (stream.avail_in) {
1613                 unsigned int this_chunk = 65536;
1614                 unsigned int this_len;
1615                 int err;
1616
1617                 if (this_chunk > total)
1618                         this_chunk = total;
1619
1620                 stream.avail_out = this_chunk;
1621                 stream.next_out = (void *)p;
1622                 err = inflate(&stream, Z_NO_FLUSH);
1623                 /* may be Z_OK, or Z_STREAM_END */
1624                 if (err < 0) {
1625                         /*
1626                          * Z_STREAM_ERROR and Z_BUF_ERROR can safely be
1627                          * ignored */
1628                         if (err == Z_STREAM_ERROR || err == Z_BUF_ERROR)
1629                                 break;
1630                         log_err("fio: inflate error %d\n", err);
1631                         free(ret);
1632                         ret = NULL;
1633                         goto err;
1634                 }
1635
1636                 this_len = this_chunk - stream.avail_out;
1637                 p += this_len;
1638                 total -= this_len;
1639         }
1640
1641 err:
1642         inflateEnd(&stream);
1643         return ret;
1644 #else
1645         return NULL;
1646 #endif
1647 }
1648
1649 /*
1650  * This has been compressed on the server side, since it can be big.
1651  * Uncompress here.
1652  */
1653 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1654                                            bool *store_direct)
1655 {
1656         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1657         struct cmd_iolog_pdu *ret;
1658         uint64_t i;
1659         int compressed;
1660         void *samples;
1661
1662         *store_direct = false;
1663
1664         /*
1665          * Convert if compressed and we support it. If it's not
1666          * compressed, we need not do anything.
1667          */
1668         compressed = le32_to_cpu(pdu->compressed);
1669         if (compressed == XMIT_COMPRESSED) {
1670 #ifndef CONFIG_ZLIB
1671                 log_err("fio: server sent compressed data by mistake\n");
1672                 return NULL;
1673 #endif
1674                 ret = convert_iolog_gz(cmd, pdu);
1675                 if (!ret) {
1676                         log_err("fio: failed decompressing log\n");
1677                         return NULL;
1678                 }
1679         } else if (compressed == STORE_COMPRESSED) {
1680                 *store_direct = true;
1681                 ret = pdu;
1682         } else
1683                 ret = pdu;
1684
1685         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1686         ret->thread_number      = le32_to_cpu(ret->thread_number);
1687         ret->log_type           = le32_to_cpu(ret->log_type);
1688         ret->compressed         = le32_to_cpu(ret->compressed);
1689         ret->log_offset         = le32_to_cpu(ret->log_offset);
1690         ret->log_prio           = le32_to_cpu(ret->log_prio);
1691         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1692
1693         if (*store_direct)
1694                 return ret;
1695
1696         samples = &ret->samples[0];
1697         for (i = 0; i < ret->nr_samples; i++) {
1698                 struct io_sample *s;
1699
1700                 s = __get_sample(samples, ret->log_offset, i);
1701                 if (ret->log_type == IO_LOG_TYPE_HIST)
1702                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1703
1704                 s->time         = le64_to_cpu(s->time);
1705                 s->data.val     = le64_to_cpu(s->data.val);
1706                 s->__ddir       = __le32_to_cpu(s->__ddir);
1707                 s->bs           = le64_to_cpu(s->bs);
1708                 s->priority     = le16_to_cpu(s->priority);
1709
1710                 if (ret->log_offset) {
1711                         struct io_sample_offset *so = (void *) s;
1712
1713                         so->offset = le64_to_cpu(so->offset);
1714                 }
1715
1716                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1717                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1718                         s->data.plat_entry->list.next = NULL;
1719                         s->data.plat_entry->list.prev = NULL;
1720                 }
1721         }
1722
1723         return ret;
1724 }
1725
1726 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1727                            size_t size, uint64_t tag)
1728 {
1729         rep->error = cpu_to_le32(rep->error);
1730         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1731 }
1732
1733 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1734                          uint64_t tag)
1735 {
1736         struct cmd_sendfile_reply *rep;
1737         struct stat sb;
1738         size_t size;
1739         int fd;
1740
1741         size = sizeof(*rep);
1742         rep = malloc(size);
1743
1744         if (stat((char *)pdu->path, &sb) < 0) {
1745 fail:
1746                 rep->error = errno;
1747                 sendfile_reply(client->fd, rep, size, tag);
1748                 free(rep);
1749                 return 1;
1750         }
1751
1752         size += sb.st_size;
1753         rep = realloc(rep, size);
1754         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1755
1756         fd = open((char *)pdu->path, O_RDONLY);
1757         if (fd == -1 )
1758                 goto fail;
1759
1760         rep->error = read_data(fd, &rep->data, sb.st_size);
1761         sendfile_reply(client->fd, rep, size, tag);
1762         free(rep);
1763         close(fd);
1764         return 0;
1765 }
1766
1767 int fio_handle_client(struct fio_client *client)
1768 {
1769         struct client_ops *ops = client->ops;
1770         struct fio_net_cmd *cmd;
1771
1772         dprint(FD_NET, "client: handle %s\n", client->hostname);
1773
1774         cmd = fio_net_recv_cmd(client->fd, true);
1775         if (!cmd)
1776                 return 0;
1777
1778         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1779                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1780
1781         client->last_cmd = cmd->opcode;
1782
1783         switch (cmd->opcode) {
1784         case FIO_NET_CMD_QUIT:
1785                 if (ops->quit)
1786                         ops->quit(client, cmd);
1787                 remove_client(client);
1788                 break;
1789         case FIO_NET_CMD_TEXT:
1790                 convert_text(cmd);
1791                 ops->text(client, cmd);
1792                 break;
1793         case FIO_NET_CMD_DU: {
1794                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1795
1796                 convert_dus(&du->dus);
1797                 convert_agg(&du->agg);
1798
1799                 ops->disk_util(client, cmd);
1800                 break;
1801                 }
1802         case FIO_NET_CMD_TS: {
1803                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1804                 uint64_t offset;
1805                 int i;
1806
1807                 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1808                         if (le32_to_cpu(p->ts.nr_clat_prio[i])) {
1809                                 offset = le64_to_cpu(p->ts.clat_prio_offset[i]);
1810                                 p->ts.clat_prio[i] =
1811                                         (struct clat_prio_stat *)((char *)p + offset);
1812                         }
1813                 }
1814
1815                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1816                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1817                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1818
1819                         offset = le64_to_cpu(p->ts.ss_iops_data_offset);
1820                         p->ts.ss_iops_data = (uint64_t *)((char *)p + offset);
1821
1822                         offset = le64_to_cpu(p->ts.ss_bw_data_offset);
1823                         p->ts.ss_bw_data = (uint64_t *)((char *)p + offset);
1824                 }
1825
1826                 convert_ts(&p->ts, &p->ts);
1827                 convert_gs(&p->rs, &p->rs);
1828
1829                 ops->thread_status(client, cmd);
1830                 break;
1831                 }
1832         case FIO_NET_CMD_GS: {
1833                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1834
1835                 convert_gs(gs, gs);
1836
1837                 ops->group_stats(client, cmd);
1838                 break;
1839                 }
1840         case FIO_NET_CMD_ETA: {
1841                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1842
1843                 if (!remove_reply_cmd(client, cmd))
1844                         break;
1845                 convert_jobs_eta(je);
1846                 handle_eta(client, cmd);
1847                 break;
1848                 }
1849         case FIO_NET_CMD_PROBE:
1850                 remove_reply_cmd(client, cmd);
1851                 ops->probe(client, cmd);
1852                 break;
1853         case FIO_NET_CMD_SERVER_START:
1854                 client->state = Client_running;
1855                 if (ops->job_start)
1856                         ops->job_start(client, cmd);
1857                 break;
1858         case FIO_NET_CMD_START: {
1859                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1860
1861                 pdu->jobs = le32_to_cpu(pdu->jobs);
1862                 ops->start(client, cmd);
1863                 break;
1864                 }
1865         case FIO_NET_CMD_STOP: {
1866                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1867
1868                 convert_stop(cmd);
1869                 client->state = Client_stopped;
1870                 client->error = le32_to_cpu(pdu->error);
1871                 client->signal = le32_to_cpu(pdu->signal);
1872                 ops->stop(client);
1873                 break;
1874                 }
1875         case FIO_NET_CMD_ADD_JOB: {
1876                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1877
1878                 client->thread_number = le32_to_cpu(pdu->thread_number);
1879                 client->groupid = le32_to_cpu(pdu->groupid);
1880
1881                 if (ops->add_job)
1882                         ops->add_job(client, cmd);
1883                 break;
1884                 }
1885         case FIO_NET_CMD_IOLOG:
1886                 fio_client_handle_iolog(client, cmd);
1887                 break;
1888         case FIO_NET_CMD_UPDATE_JOB:
1889                 ops->update_job(client, cmd);
1890                 remove_reply_cmd(client, cmd);
1891                 break;
1892         case FIO_NET_CMD_VTRIGGER: {
1893                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1894                 char buf[128];
1895                 int off = 0;
1896
1897                 if (aux_path) {
1898                         strcpy(buf, aux_path);
1899                         off = strlen(buf);
1900                 }
1901
1902                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1903                 exec_trigger(trigger_cmd);
1904                 break;
1905                 }
1906         case FIO_NET_CMD_SENDFILE: {
1907                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1908                 fio_send_file(client, pdu, cmd->tag);
1909                 break;
1910                 }
1911         case FIO_NET_CMD_JOB_OPT: {
1912                 handle_job_opt(client, cmd);
1913                 break;
1914         }
1915         default:
1916                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1917                 break;
1918         }
1919
1920         free(cmd);
1921         return 1;
1922 }
1923
1924 int fio_clients_send_trigger(const char *cmd)
1925 {
1926         struct flist_head *entry;
1927         struct fio_client *client;
1928         size_t slen;
1929
1930         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1931
1932         if (!cmd)
1933                 slen = 0;
1934         else
1935                 slen = strlen(cmd);
1936
1937         flist_for_each(entry, &client_list) {
1938                 struct cmd_vtrigger_pdu *pdu;
1939
1940                 client = flist_entry(entry, struct fio_client, list);
1941
1942                 pdu = malloc(sizeof(*pdu) + slen);
1943                 pdu->len = cpu_to_le16((uint16_t) slen);
1944                 if (slen)
1945                         memcpy(pdu->cmd, cmd, slen);
1946                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1947                                         sizeof(*pdu) + slen, NULL, NULL);
1948                 free(pdu);
1949         }
1950
1951         return 0;
1952 }
1953
1954 static void request_client_etas(struct client_ops *ops)
1955 {
1956         struct fio_client *client;
1957         struct flist_head *entry;
1958         struct client_eta *eta;
1959         int skipped = 0;
1960
1961         if (eta_print == FIO_ETA_NEVER)
1962                 return;
1963
1964         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1965
1966         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1967         eta->pending = nr_clients;
1968
1969         flist_for_each(entry, &client_list) {
1970                 client = flist_entry(entry, struct fio_client, list);
1971
1972                 if (!flist_empty(&client->eta_list)) {
1973                         skipped++;
1974                         continue;
1975                 }
1976                 if (client->state != Client_running)
1977                         continue;
1978
1979                 assert(!client->eta_in_flight);
1980                 flist_add_tail(&client->eta_list, &eta_list);
1981                 client->eta_in_flight = eta;
1982                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1983                                         (uintptr_t) eta, &client->cmd_list);
1984         }
1985
1986         while (skipped--) {
1987                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1988                         break;
1989         }
1990
1991         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1992 }
1993
1994 /*
1995  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
1996  */
1997 static int handle_cmd_timeout(struct fio_client *client,
1998                               struct fio_net_cmd_reply *reply)
1999 {
2000         uint16_t reply_opcode = reply->opcode;
2001
2002         flist_del(&reply->list);
2003         free(reply);
2004
2005         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
2006                 return 1;
2007
2008         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
2009
2010         flist_del_init(&client->eta_list);
2011         if (client->eta_in_flight) {
2012                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
2013                 client->eta_in_flight = NULL;
2014         }
2015
2016         /*
2017          * If we fail 5 in a row, give up...
2018          */
2019         if (client->eta_timeouts++ > 5)
2020                 return 1;
2021
2022         return 0;
2023 }
2024
2025 static int client_check_cmd_timeout(struct fio_client *client,
2026                                     struct timespec *now)
2027 {
2028         struct fio_net_cmd_reply *reply;
2029         struct flist_head *entry, *tmp;
2030         int ret = 0;
2031
2032         flist_for_each_safe(entry, tmp, &client->cmd_list) {
2033                 unsigned int op;
2034
2035                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
2036
2037                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
2038                         continue;
2039
2040                 op = reply->opcode;
2041                 if (!handle_cmd_timeout(client, reply))
2042                         continue;
2043
2044                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
2045                                                 fio_server_op(op));
2046                 ret = 1;
2047         }
2048
2049         return flist_empty(&client->cmd_list) && ret;
2050 }
2051
2052 static int fio_check_clients_timed_out(void)
2053 {
2054         struct fio_client *client;
2055         struct flist_head *entry, *tmp;
2056         struct timespec ts;
2057         int ret = 0;
2058
2059         fio_gettime(&ts, NULL);
2060
2061         flist_for_each_safe(entry, tmp, &client_list) {
2062                 client = flist_entry(entry, struct fio_client, list);
2063
2064                 if (flist_empty(&client->cmd_list))
2065                         continue;
2066
2067                 if (!client_check_cmd_timeout(client, &ts))
2068                         continue;
2069
2070                 if (client->ops->timed_out)
2071                         client->ops->timed_out(client);
2072                 else
2073                         log_err("fio: client %s timed out\n", client->hostname);
2074
2075                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
2076                         client->error = ETIMEDOUT;
2077                 else
2078                         log_info("fio: ignoring timeout due to vtrigger\n");
2079                 remove_client(client);
2080                 ret = 1;
2081         }
2082
2083         return ret;
2084 }
2085
2086 int fio_handle_clients(struct client_ops *ops)
2087 {
2088         struct pollfd *pfds;
2089         int i, ret = 0, retval = 0;
2090
2091         fio_gettime(&eta_ts, NULL);
2092
2093         pfds = malloc(nr_clients * sizeof(struct pollfd));
2094
2095         init_thread_stat(&client_ts);
2096         init_group_run_stat(&client_gs);
2097
2098         while (!exit_backend && nr_clients) {
2099                 struct flist_head *entry, *tmp;
2100                 struct fio_client *client;
2101
2102                 i = 0;
2103                 flist_for_each_safe(entry, tmp, &client_list) {
2104                         client = flist_entry(entry, struct fio_client, list);
2105
2106                         if (!client->sent_job && !client->ops->stay_connected &&
2107                             flist_empty(&client->cmd_list)) {
2108                                 remove_client(client);
2109                                 continue;
2110                         }
2111
2112                         pfds[i].fd = client->fd;
2113                         pfds[i].events = POLLIN;
2114                         i++;
2115                 }
2116
2117                 if (!nr_clients)
2118                         break;
2119
2120                 assert(i == nr_clients);
2121
2122                 do {
2123                         struct timespec ts;
2124                         int timeout;
2125
2126                         fio_gettime(&ts, NULL);
2127                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2128                                 request_client_etas(ops);
2129                                 memcpy(&eta_ts, &ts, sizeof(ts));
2130
2131                                 if (fio_check_clients_timed_out())
2132                                         break;
2133                         }
2134
2135                         check_trigger_file();
2136
2137                         timeout = min(100u, ops->eta_msec);
2138
2139                         ret = poll(pfds, nr_clients, timeout);
2140                         if (ret < 0) {
2141                                 if (errno == EINTR)
2142                                         continue;
2143                                 log_err("fio: poll clients: %s\n", strerror(errno));
2144                                 break;
2145                         } else if (!ret)
2146                                 continue;
2147                 } while (ret <= 0);
2148
2149                 for (i = 0; i < nr_clients; i++) {
2150                         if (!(pfds[i].revents & POLLIN))
2151                                 continue;
2152
2153                         client = find_client_by_fd(pfds[i].fd);
2154                         if (!client) {
2155                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2156                                 continue;
2157                         }
2158                         if (!fio_handle_client(client)) {
2159                                 log_info("client: host=%s disconnected\n",
2160                                                 client->hostname);
2161                                 remove_client(client);
2162                                 retval = 1;
2163                         } else if (client->error)
2164                                 retval = 1;
2165                         fio_put_client(client);
2166                 }
2167         }
2168
2169         log_info_buf(allclients.buf, allclients.buflen);
2170         buf_output_free(&allclients);
2171
2172         fio_client_json_fini();
2173
2174         free_clat_prio_stats(&client_ts);
2175         free(pfds);
2176         return retval || error_clients;
2177 }
2178
2179 static void client_display_thread_status(struct jobs_eta *je)
2180 {
2181         if (!(output_format & FIO_OUTPUT_JSON))
2182                 display_thread_status(je);
2183 }