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 const 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 = calloc(1, sizeof(*client));
 373
 374         INIT_FLIST_HEAD(&client->list);
 375         INIT_FLIST_HEAD(&client->hash_list);
 376         INIT_FLIST_HEAD(&client->arg_list);
 377         INIT_FLIST_HEAD(&client->eta_list);
 378         INIT_FLIST_HEAD(&client->cmd_list);
 379
 380         buf_output_init(&client->buf);
 381
 382         return client;
 383 }
 384
 385 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 386                                            const char *hostname, int type,
 387                                            int port)
 388 {
 389         struct fio_client *client;
 390
 391         client = get_new_client();
 392
 393         if (type == Fio_client_socket)
 394                 client->is_sock = true;
 395         else {
 396                 int ipv6;
 397
 398                 ipv6 = type == Fio_client_ipv6;
 399                 if (fio_server_parse_host(hostname, ipv6,
 400                                                 &client->addr.sin_addr,
 401                                                 &client->addr6.sin6_addr))
 402                         goto err;
 403
 404                 client->port = port;
 405         }
 406
 407         client->fd = -1;
 408         client->ops = ops;
 409         client->refs = 1;
 410         client->type = ops->client_type;
 411         client->hostname = strdup(hostname);
 412
 413         __fio_client_add_cmd_option(client, "fio");
 414
 415         flist_add(&client->list, &client_list);
 416         nr_clients++;
 417         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 418         return client;
 419 err:
 420         free(client);
 421         return NULL;
 422 }
 423
 424 int fio_client_add_ini_file(void *cookie, const char *ini_file, bool remote)
 425 {
 426         struct fio_client *client = cookie;
 427         struct client_file *cf;
 428         size_t new_size;
 429         void *new_files;
 430
 431         if (!client)
 432                 return 1;
 433
 434         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 435
 436         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 437         new_files = realloc(client->files, new_size);
 438         if (!new_files)
 439                 return 1;
 440
 441         client->files = new_files;
 442         cf = &client->files[client->nr_files];
 443         cf->file = strdup(ini_file);
 444         cf->remote = remote;
 445         client->nr_files++;
 446         return 0;
 447 }
 448
 449 int fio_client_add(struct client_ops const *ops, const char *hostname, void **cookie)
 450 {
 451         struct fio_client *existing = *cookie;
 452         struct fio_client *client;
 453
 454         if (existing) {
 455                 /*
 456                  * We always add our "exec" name as the option, hence 1
 457                  * means empty.
 458                  */
 459                 if (existing->argc == 1)
 460                         flist_add_tail(&existing->arg_list, &arg_list);
 461                 else {
 462                         while (!flist_empty(&arg_list))
 463                                 flist_del_init(arg_list.next);
 464                 }
 465         }
 466
 467         client = get_new_client();
 468
 469         if (fio_server_parse_string(hostname, &client->hostname,
 470                                         &client->is_sock, &client->port,
 471                                         &client->addr.sin_addr,
 472                                         &client->addr6.sin6_addr,
 473                                         &client->ipv6)) {
 474                 fio_put_client(client);
 475                 return -1;
 476         }
 477
 478         client->fd = -1;
 479         client->ops = ops;
 480         client->refs = 1;
 481         client->type = ops->client_type;
 482
 483         __fio_client_add_cmd_option(client, "fio");
 484
 485         flist_add(&client->list, &client_list);
 486         nr_clients++;
 487         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 488         *cookie = client;
 489         return 0;
 490 }
 491
 492 static const char *server_name(struct fio_client *client, char *buf,
 493                                size_t bufsize)
 494 {
 495         const char *from;
 496
 497         if (client->ipv6)
 498                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 499         else if (client->is_sock)
 500                 from = "sock";
 501         else
 502                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 503
 504         return from;
 505 }
 506
 507 static void probe_client(struct fio_client *client)
 508 {
 509         struct cmd_client_probe_pdu pdu;
 510         const char *sname;
 511         uint64_t tag;
 512         char buf[64];
 513
 514         dprint(FD_NET, "client: send probe\n");
 515
 516 #ifdef CONFIG_ZLIB
 517         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 518 #else
 519         pdu.flags = 0;
 520 #endif
 521
 522         sname = server_name(client, buf, sizeof(buf));
 523         memset(pdu.server, 0, sizeof(pdu.server));
 524         snprintf((char *) pdu.server, sizeof(pdu.server), "%s", sname);
 525
 526         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 527 }
 528
 529 static int fio_client_connect_ip(struct fio_client *client)
 530 {
 531         struct sockaddr *addr;
 532         socklen_t socklen;
 533         int fd, domain;
 534
 535         if (client->ipv6) {
 536                 client->addr6.sin6_family = AF_INET6;
 537                 client->addr6.sin6_port = htons(client->port);
 538                 domain = AF_INET6;
 539                 addr = (struct sockaddr *) &client->addr6;
 540                 socklen = sizeof(client->addr6);
 541         } else {
 542                 client->addr.sin_family = AF_INET;
 543                 client->addr.sin_port = htons(client->port);
 544                 domain = AF_INET;
 545                 addr = (struct sockaddr *) &client->addr;
 546                 socklen = sizeof(client->addr);
 547         }
 548
 549         fd = socket(domain, SOCK_STREAM, 0);
 550         if (fd < 0) {
 551                 int ret = -errno;
 552
 553                 log_err("fio: socket: %s\n", strerror(errno));
 554                 return ret;
 555         }
 556
 557         if (connect(fd, addr, socklen) < 0) {
 558                 int ret = -errno;
 559
 560                 log_err("fio: connect: %s\n", strerror(errno));
 561                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 562                                                                 client->port);
 563                 close(fd);
 564                 return ret;
 565         }
 566
 567         return fd;
 568 }
 569
 570 static int fio_client_connect_sock(struct fio_client *client)
 571 {
 572         struct sockaddr_un *addr = &client->addr_un;
 573         socklen_t len;
 574         int fd;
 575
 576         memset(addr, 0, sizeof(*addr));
 577         addr->sun_family = AF_UNIX;
 578         snprintf(addr->sun_path, sizeof(addr->sun_path), "%s",
 579                  client->hostname);
 580
 581         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 582         if (fd < 0) {
 583                 int ret = -errno;
 584
 585                 log_err("fio: socket: %s\n", strerror(errno));
 586                 return ret;
 587         }
 588
 589         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 590         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 591                 int ret = -errno;
 592
 593                 log_err("fio: connect; %s\n", strerror(errno));
 594                 close(fd);
 595                 return ret;
 596         }
 597
 598         return fd;
 599 }
 600
 601 int fio_client_connect(struct fio_client *client)
 602 {
 603         int fd;
 604
 605         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 606
 607         if (client->is_sock)
 608                 fd = fio_client_connect_sock(client);
 609         else
 610                 fd = fio_client_connect_ip(client);
 611
 612         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 613
 614         if (fd < 0)
 615                 return fd;
 616
 617         client->fd = fd;
 618         fio_client_add_hash(client);
 619         client->state = Client_connected;
 620
 621         probe_client(client);
 622         return 0;
 623 }
 624
 625 int fio_client_terminate(struct fio_client *client)
 626 {
 627         return fio_net_send_quit(client->fd);
 628 }
 629
 630 static void fio_clients_terminate(void)
 631 {
 632         struct flist_head *entry;
 633         struct fio_client *client;
 634
 635         dprint(FD_NET, "client: terminate clients\n");
 636
 637         flist_for_each(entry, &client_list) {
 638                 client = flist_entry(entry, struct fio_client, list);
 639                 fio_client_terminate(client);
 640         }
 641 }
 642
 643 static void sig_int(int sig)
 644 {
 645         dprint(FD_NET, "client: got signal %d\n", sig);
 646         fio_clients_terminate();
 647 }
 648
 649 static void client_signal_handler(void)
 650 {
 651         struct sigaction act;
 652
 653         memset(&act, 0, sizeof(act));
 654         act.sa_handler = sig_int;
 655         act.sa_flags = SA_RESTART;
 656         sigaction(SIGINT, &act, NULL);
 657
 658         memset(&act, 0, sizeof(act));
 659         act.sa_handler = sig_int;
 660         act.sa_flags = SA_RESTART;
 661         sigaction(SIGTERM, &act, NULL);
 662
 663 /* Windows uses SIGBREAK as a quit signal from other applications */
 664 #ifdef WIN32
 665         memset(&act, 0, sizeof(act));
 666         act.sa_handler = sig_int;
 667         act.sa_flags = SA_RESTART;
 668         sigaction(SIGBREAK, &act, NULL);
 669 #endif
 670
 671         memset(&act, 0, sizeof(act));
 672         act.sa_handler = sig_show_status;
 673         act.sa_flags = SA_RESTART;
 674         sigaction(SIGUSR1, &act, NULL);
 675 }
 676
 677 static int send_client_cmd_line(struct fio_client *client)
 678 {
 679         struct cmd_single_line_pdu *cslp;
 680         struct cmd_line_pdu *clp;
 681         unsigned long offset;
 682         unsigned int *lens;
 683         void *pdu;
 684         size_t mem;
 685         int i, ret;
 686
 687         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 688
 689         lens = malloc(client->argc * sizeof(unsigned int));
 690
 691         /*
 692          * Find out how much mem we need
 693          */
 694         for (i = 0, mem = 0; i < client->argc; i++) {
 695                 lens[i] = strlen(client->argv[i]) + 1;
 696                 mem += lens[i];
 697         }
 698
 699         /*
 700          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 701          */
 702         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 703
 704         pdu = malloc(mem);
 705         clp = pdu;
 706         offset = sizeof(*clp);
 707
 708         for (i = 0; i < client->argc; i++) {
 709                 uint16_t arg_len = lens[i];
 710
 711                 cslp = pdu + offset;
 712                 strcpy((char *) cslp->text, client->argv[i]);
 713                 cslp->len = cpu_to_le16(arg_len);
 714                 offset += sizeof(*cslp) + arg_len;
 715         }
 716
 717         free(lens);
 718         clp->lines = cpu_to_le16(client->argc);
 719         clp->client_type = __cpu_to_le16(client->type);
 720         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 721         free(pdu);
 722         return ret;
 723 }
 724
 725 int fio_clients_connect(void)
 726 {
 727         struct fio_client *client;
 728         struct flist_head *entry, *tmp;
 729         int ret;
 730
 731 #ifdef WIN32
 732         WSADATA wsd;
 733         WSAStartup(MAKEWORD(2, 2), &wsd);
 734 #endif
 735
 736         dprint(FD_NET, "client: connect all\n");
 737
 738         client_signal_handler();
 739
 740         flist_for_each_safe(entry, tmp, &client_list) {
 741                 client = flist_entry(entry, struct fio_client, list);
 742
 743                 ret = fio_client_connect(client);
 744                 if (ret) {
 745                         remove_client(client);
 746                         continue;
 747                 }
 748
 749                 if (client->argc > 1)
 750                         send_client_cmd_line(client);
 751         }
 752
 753         return !nr_clients;
 754 }
 755
 756 int fio_start_client(struct fio_client *client)
 757 {
 758         dprint(FD_NET, "client: start %s\n", client->hostname);
 759         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 760 }
 761
 762 int fio_start_all_clients(void)
 763 {
 764         struct fio_client *client;
 765         struct flist_head *entry, *tmp;
 766         int ret;
 767
 768         dprint(FD_NET, "client: start all\n");
 769
 770         fio_client_json_init();
 771
 772         flist_for_each_safe(entry, tmp, &client_list) {
 773                 client = flist_entry(entry, struct fio_client, list);
 774
 775                 ret = fio_start_client(client);
 776                 if (ret) {
 777                         remove_client(client);
 778                         continue;
 779                 }
 780         }
 781
 782         return flist_empty(&client_list);
 783 }
 784
 785 static int __fio_client_send_remote_ini(struct fio_client *client,
 786                                         const char *filename)
 787 {
 788         struct cmd_load_file_pdu *pdu;
 789         size_t p_size;
 790         int ret;
 791
 792         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 793
 794         p_size = sizeof(*pdu) + strlen(filename) + 1;
 795         pdu = calloc(1, p_size);
 796         pdu->name_len = strlen(filename);
 797         strcpy((char *) pdu->file, filename);
 798         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 799
 800         client->sent_job = true;
 801         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 802         free(pdu);
 803         return ret;
 804 }
 805
 806 /*
 807  * Send file contents to server backend. We could use sendfile(), but to remain
 808  * more portable lets just read/write the darn thing.
 809  */
 810 static int __fio_client_send_local_ini(struct fio_client *client,
 811                                        const char *filename)
 812 {
 813         struct cmd_job_pdu *pdu;
 814         size_t p_size;
 815         struct stat sb;
 816         char *p;
 817         void *buf;
 818         off_t len;
 819         int fd, ret;
 820
 821         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 822
 823         fd = open(filename, O_RDONLY);
 824         if (fd < 0) {
 825                 ret = -errno;
 826                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 827                 return ret;
 828         }
 829
 830         if (fstat(fd, &sb) < 0) {
 831                 ret = -errno;
 832                 log_err("fio: job file stat: %s\n", strerror(errno));
 833                 close(fd);
 834                 return ret;
 835         }
 836
 837         /*
 838          * Add extra space for variable expansion, but doesn't guarantee.
 839          */
 840         sb.st_size += OPT_LEN_MAX;
 841         p_size = sb.st_size + sizeof(*pdu);
 842         pdu = malloc(p_size);
 843         buf = pdu->buf;
 844
 845         len = sb.st_size;
 846         p = buf;
 847         if (read_ini_data(fd, p, len)) {
 848                 log_err("fio: failed reading job file %s\n", filename);
 849                 close(fd);
 850                 free(pdu);
 851                 return 1;
 852         }
 853
 854         pdu->buf_len = __cpu_to_le32(sb.st_size);
 855         pdu->client_type = cpu_to_le32(client->type);
 856
 857         client->sent_job = true;
 858         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 859         free(pdu);
 860         close(fd);
 861         return ret;
 862 }
 863
 864 int fio_client_send_ini(struct fio_client *client, const char *filename,
 865                         bool remote)
 866 {
 867         int ret;
 868
 869         if (!remote)
 870                 ret = __fio_client_send_local_ini(client, filename);
 871         else
 872                 ret = __fio_client_send_remote_ini(client, filename);
 873
 874         if (!ret)
 875                 client->sent_job = true;
 876
 877         return ret;
 878 }
 879
 880 static int fio_client_send_cf(struct fio_client *client,
 881                               struct client_file *cf)
 882 {
 883         return fio_client_send_ini(client, cf->file, cf->remote);
 884 }
 885
 886 int fio_clients_send_ini(const char *filename)
 887 {
 888         struct fio_client *client;
 889         struct flist_head *entry, *tmp;
 890
 891         flist_for_each_safe(entry, tmp, &client_list) {
 892                 bool failed = false;
 893
 894                 client = flist_entry(entry, struct fio_client, list);
 895
 896                 if (client->nr_files) {
 897                         int i;
 898
 899                         for (i = 0; i < client->nr_files; i++) {
 900                                 struct client_file *cf;
 901
 902                                 cf = &client->files[i];
 903
 904                                 if (fio_client_send_cf(client, cf)) {
 905                                         failed = true;
 906                                         remove_client(client);
 907                                         break;
 908                                 }
 909                         }
 910                 }
 911                 if (client->sent_job || failed)
 912                         continue;
 913                 if (!filename || fio_client_send_ini(client, filename, 0))
 914                         remove_client(client);
 915         }
 916
 917         return !nr_clients;
 918 }
 919
 920 int fio_client_update_options(struct fio_client *client,
 921                               struct thread_options *o, uint64_t *tag)
 922 {
 923         size_t cmd_sz = offsetof(struct cmd_add_job_pdu, top) +
 924                 thread_options_pack_size(o);
 925         struct cmd_add_job_pdu *pdu;
 926         int ret;
 927
 928         pdu = malloc(cmd_sz);
 929         pdu->thread_number = cpu_to_le32(client->thread_number);
 930         pdu->groupid = cpu_to_le32(client->groupid);
 931         convert_thread_options_to_net(&pdu->top, o);
 932
 933         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, pdu,
 934                                cmd_sz, tag, &client->cmd_list);
 935         free(pdu);
 936         return ret;
 937 }
 938
 939 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 940 {
 941         dst->max_val    = le64_to_cpu(src->max_val);
 942         dst->min_val    = le64_to_cpu(src->min_val);
 943         dst->samples    = le64_to_cpu(src->samples);
 944
 945         /*
 946          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 947          */
 948         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 949         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 950 }
 951
 952 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 953 {
 954         int i, j, k;
 955
 956         dst->error              = le32_to_cpu(src->error);
 957         dst->thread_number      = le32_to_cpu(src->thread_number);
 958         dst->groupid            = le32_to_cpu(src->groupid);
 959         dst->job_start          = le64_to_cpu(src->job_start);
 960         dst->pid                = le32_to_cpu(src->pid);
 961         dst->members            = le32_to_cpu(src->members);
 962         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 963         dst->ioprio             = le32_to_cpu(src->ioprio);
 964         dst->disable_prio_stat  = le32_to_cpu(src->disable_prio_stat);
 965
 966         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 967                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 968                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 969                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 970                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 971                 convert_io_stat(&dst->iops_stat[i], &src->iops_stat[i]);
 972         }
 973         convert_io_stat(&dst->sync_stat, &src->sync_stat);
 974
 975         dst->usr_time           = le64_to_cpu(src->usr_time);
 976         dst->sys_time           = le64_to_cpu(src->sys_time);
 977         dst->ctx                = le64_to_cpu(src->ctx);
 978         dst->minf               = le64_to_cpu(src->minf);
 979         dst->majf               = le64_to_cpu(src->majf);
 980         dst->clat_percentiles   = le32_to_cpu(src->clat_percentiles);
 981         dst->lat_percentiles    = le32_to_cpu(src->lat_percentiles);
 982         dst->slat_percentiles   = le32_to_cpu(src->slat_percentiles);
 983         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 984
 985         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 986                 fio_fp64_t *fps = &src->percentile_list[i];
 987                 fio_fp64_t *fpd = &dst->percentile_list[i];
 988
 989                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 990         }
 991
 992         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 993                 dst->io_u_map[i]        = le64_to_cpu(src->io_u_map[i]);
 994                 dst->io_u_submit[i]     = le64_to_cpu(src->io_u_submit[i]);
 995                 dst->io_u_complete[i]   = le64_to_cpu(src->io_u_complete[i]);
 996         }
 997
 998         for (i = 0; i < FIO_IO_U_LAT_N_NR; i++)
 999                 dst->io_u_lat_n[i]      = le64_to_cpu(src->io_u_lat_n[i]);
1000         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
1001                 dst->io_u_lat_u[i]      = le64_to_cpu(src->io_u_lat_u[i]);
1002         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
1003                 dst->io_u_lat_m[i]      = le64_to_cpu(src->io_u_lat_m[i]);
1004
1005         for (i = 0; i < FIO_LAT_CNT; i++)
1006                 for (j = 0; j < DDIR_RWDIR_CNT; j++)
1007                         for (k = 0; k < FIO_IO_U_PLAT_NR; k++)
1008                                 dst->io_u_plat[i][j][k] = le64_to_cpu(src->io_u_plat[i][j][k]);
1009
1010         for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1011                 dst->io_u_sync_plat[j] = le64_to_cpu(src->io_u_sync_plat[j]);
1012
1013         for (i = 0; i < DDIR_RWDIR_SYNC_CNT; i++)
1014                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
1015
1016         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1017                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
1018                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
1019         }
1020
1021         dst->total_submit       = le64_to_cpu(src->total_submit);
1022         dst->total_complete     = le64_to_cpu(src->total_complete);
1023         dst->nr_zone_resets     = le64_to_cpu(src->nr_zone_resets);
1024
1025         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1026                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
1027                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
1028         }
1029
1030         dst->total_run_time     = le64_to_cpu(src->total_run_time);
1031         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
1032         dst->total_err_count    = le64_to_cpu(src->total_err_count);
1033         dst->first_error        = le32_to_cpu(src->first_error);
1034         dst->kb_base            = le32_to_cpu(src->kb_base);
1035         dst->unit_base          = le32_to_cpu(src->unit_base);
1036
1037         dst->sig_figs           = le32_to_cpu(src->sig_figs);
1038
1039         dst->latency_depth      = le32_to_cpu(src->latency_depth);
1040         dst->latency_target     = le64_to_cpu(src->latency_target);
1041         dst->latency_window     = le64_to_cpu(src->latency_window);
1042         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
1043
1044         dst->nr_block_infos     = le64_to_cpu(src->nr_block_infos);
1045         for (i = 0; i < dst->nr_block_infos; i++)
1046                 dst->block_infos[i] = le32_to_cpu(src->block_infos[i]);
1047
1048         dst->ss_dur             = le64_to_cpu(src->ss_dur);
1049         dst->ss_state           = le32_to_cpu(src->ss_state);
1050         dst->ss_head            = le32_to_cpu(src->ss_head);
1051         dst->ss_limit.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_limit.u.i));
1052         dst->ss_slope.u.f       = fio_uint64_to_double(le64_to_cpu(src->ss_slope.u.i));
1053         dst->ss_deviation.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_deviation.u.i));
1054         dst->ss_criterion.u.f   = fio_uint64_to_double(le64_to_cpu(src->ss_criterion.u.i));
1055
1056         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1057                 dst->nr_clat_prio[i] = le32_to_cpu(src->nr_clat_prio[i]);
1058                 for (j = 0; j < dst->nr_clat_prio[i]; j++) {
1059                         for (k = 0; k < FIO_IO_U_PLAT_NR; k++)
1060                                 dst->clat_prio[i][j].io_u_plat[k] =
1061                                         le64_to_cpu(src->clat_prio[i][j].io_u_plat[k]);
1062                         convert_io_stat(&dst->clat_prio[i][j].clat_stat,
1063                                         &src->clat_prio[i][j].clat_stat);
1064                         dst->clat_prio[i][j].ioprio =
1065                                 le32_to_cpu(dst->clat_prio[i][j].ioprio);
1066                 }
1067         }
1068
1069         if (dst->ss_state & FIO_SS_DATA) {
1070                 for (i = 0; i < dst->ss_dur; i++ ) {
1071                         dst->ss_iops_data[i] = le64_to_cpu(src->ss_iops_data[i]);
1072                         dst->ss_bw_data[i] = le64_to_cpu(src->ss_bw_data[i]);
1073                 }
1074         }
1075
1076         dst->cachehit           = le64_to_cpu(src->cachehit);
1077         dst->cachemiss          = le64_to_cpu(src->cachemiss);
1078 }
1079
1080 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
1081 {
1082         int i;
1083
1084         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1085                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
1086                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
1087                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
1088                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
1089                 dst->iobytes[i]         = le64_to_cpu(src->iobytes[i]);
1090                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
1091         }
1092
1093         dst->kb_base    = le32_to_cpu(src->kb_base);
1094         dst->unit_base  = le32_to_cpu(src->unit_base);
1095         dst->sig_figs   = le32_to_cpu(src->sig_figs);
1096         dst->groupid    = le32_to_cpu(src->groupid);
1097         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
1098 }
1099
1100 static void json_object_add_client_info(struct json_object *obj,
1101                                         struct fio_client *client)
1102 {
1103         const char *hostname = client->hostname ? client->hostname : "";
1104
1105         json_object_add_value_string(obj, "hostname", hostname);
1106         json_object_add_value_int(obj, "port", client->port);
1107 }
1108
1109 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
1110 {
1111         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1112         struct flist_head *opt_list = NULL;
1113         struct json_object *tsobj;
1114
1115         if (client->opt_lists && p->ts.thread_number <= client->jobs)
1116                 opt_list = &client->opt_lists[p->ts.thread_number - 1];
1117
1118         tsobj = show_thread_status(&p->ts, &p->rs, opt_list, &client->buf);
1119         client->did_stat = true;
1120         if (tsobj) {
1121                 json_object_add_client_info(tsobj, client);
1122                 json_array_add_value_object(clients_array, tsobj);
1123         }
1124
1125         if (sum_stat_clients <= 1)
1126                 return;
1127
1128         sum_thread_stats(&client_ts, &p->ts);
1129         sum_group_stats(&client_gs, &p->rs);
1130
1131         client_ts.members++;
1132         client_ts.thread_number = p->ts.thread_number;
1133         client_ts.groupid = p->ts.groupid;
1134         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
1135         client_ts.sig_figs = p->ts.sig_figs;
1136
1137         if (++sum_stat_nr == sum_stat_clients) {
1138                 strcpy(client_ts.name, "All clients");
1139                 tsobj = show_thread_status(&client_ts, &client_gs, NULL, &allclients);
1140                 if (tsobj) {
1141                         json_object_add_client_info(tsobj, client);
1142                         json_array_add_value_object(clients_array, tsobj);
1143                 }
1144         }
1145 }
1146
1147 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
1148 {
1149         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1150
1151         if (output_format & FIO_OUTPUT_NORMAL)
1152                 show_group_stats(gs, &client->buf);
1153 }
1154
1155 static void handle_job_opt(struct fio_client *client, struct fio_net_cmd *cmd)
1156 {
1157         struct cmd_job_option *pdu = (struct cmd_job_option *) cmd->payload;
1158
1159         pdu->global = le16_to_cpu(pdu->global);
1160         pdu->truncated = le16_to_cpu(pdu->truncated);
1161         pdu->groupid = le32_to_cpu(pdu->groupid);
1162
1163         if (pdu->global) {
1164                 if (!job_opt_object)
1165                         return;
1166
1167                 json_object_add_value_string(job_opt_object,
1168                                              (const char *)pdu->name,
1169                                              (const char *)pdu->value);
1170         } else if (client->opt_lists) {
1171                 struct flist_head *opt_list = &client->opt_lists[pdu->groupid];
1172                 struct print_option *p;
1173
1174                 p = malloc(sizeof(*p));
1175                 p->name = strdup((const char *)pdu->name);
1176                 p->value = pdu->value[0] ? strdup((const char *)pdu->value) :
1177                         NULL;
1178                 flist_add_tail(&p->list, opt_list);
1179         }
1180 }
1181
1182 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
1183 {
1184         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1185         const char *buf = (const char *) pdu->buf;
1186         const char *name;
1187         int fio_unused ret;
1188         struct buf_output out;
1189
1190         buf_output_init(&out);
1191
1192         name = client->name ? client->name : client->hostname;
1193
1194         if (!client->skip_newline && !(output_format & FIO_OUTPUT_TERSE))
1195                 __log_buf(&out, "<%s> ", name);
1196         __log_buf(&out, "%s", buf);
1197         log_info_buf(out.buf, out.buflen);
1198         buf_output_free(&out);
1199         client->skip_newline = strchr(buf, '\n') == NULL;
1200 }
1201
1202 static void convert_agg(struct disk_util_agg *agg)
1203 {
1204         int i;
1205
1206         for (i = 0; i < 2; i++) {
1207                 agg->ios[i]     = le64_to_cpu(agg->ios[i]);
1208                 agg->merges[i]  = le64_to_cpu(agg->merges[i]);
1209                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
1210                 agg->ticks[i]   = le64_to_cpu(agg->ticks[i]);
1211         }
1212
1213         agg->io_ticks           = le64_to_cpu(agg->io_ticks);
1214         agg->time_in_queue      = le64_to_cpu(agg->time_in_queue);
1215         agg->slavecount         = le32_to_cpu(agg->slavecount);
1216         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
1217 }
1218
1219 static void convert_dus(struct disk_util_stat *dus)
1220 {
1221         int i;
1222
1223         for (i = 0; i < 2; i++) {
1224                 dus->s.ios[i]           = le64_to_cpu(dus->s.ios[i]);
1225                 dus->s.merges[i]        = le64_to_cpu(dus->s.merges[i]);
1226                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
1227                 dus->s.ticks[i]         = le64_to_cpu(dus->s.ticks[i]);
1228         }
1229
1230         dus->s.io_ticks         = le64_to_cpu(dus->s.io_ticks);
1231         dus->s.time_in_queue    = le64_to_cpu(dus->s.time_in_queue);
1232         dus->s.msec             = le64_to_cpu(dus->s.msec);
1233 }
1234
1235 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
1236 {
1237         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1238
1239         if (!client->disk_stats_shown)
1240                 client->disk_stats_shown = true;
1241
1242         if (output_format & FIO_OUTPUT_JSON) {
1243                 struct json_object *duobj;
1244
1245                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1246                 duobj = json_array_last_value_object(du_array);
1247                 json_object_add_client_info(duobj, client);
1248         }
1249         if (output_format & FIO_OUTPUT_NORMAL) {
1250                 __log_buf(&client->buf, "\nDisk stats (read/write):\n");
1251                 print_disk_util(&du->dus, &du->agg, 0, &client->buf);
1252         }
1253         if (output_format & FIO_OUTPUT_TERSE && terse_version >= 3) {
1254                 print_disk_util(&du->dus, &du->agg, 1, &client->buf);
1255                 __log_buf(&client->buf, "\n");
1256         }
1257 }
1258
1259 static void convert_jobs_eta(struct jobs_eta *je)
1260 {
1261         int i;
1262
1263         je->nr_running          = le32_to_cpu(je->nr_running);
1264         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1265         je->nr_pending          = le32_to_cpu(je->nr_pending);
1266         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1267         je->files_open          = le32_to_cpu(je->files_open);
1268
1269         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1270                 je->m_rate[i]   = le64_to_cpu(je->m_rate[i]);
1271                 je->t_rate[i]   = le64_to_cpu(je->t_rate[i]);
1272                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1273                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1274                 je->rate[i]     = le64_to_cpu(je->rate[i]);
1275                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1276         }
1277
1278         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1279         je->eta_sec             = le64_to_cpu(je->eta_sec);
1280         je->nr_threads          = le32_to_cpu(je->nr_threads);
1281         je->is_pow2             = le32_to_cpu(je->is_pow2);
1282         je->unit_base           = le32_to_cpu(je->unit_base);
1283         je->sig_figs            = le32_to_cpu(je->sig_figs);
1284 }
1285
1286 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1287 {
1288         int i;
1289
1290         dst->nr_running         += je->nr_running;
1291         dst->nr_ramp            += je->nr_ramp;
1292         dst->nr_pending         += je->nr_pending;
1293         dst->nr_setting_up      += je->nr_setting_up;
1294         dst->files_open         += je->files_open;
1295
1296         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1297                 dst->m_rate[i]  += je->m_rate[i];
1298                 dst->t_rate[i]  += je->t_rate[i];
1299                 dst->m_iops[i]  += je->m_iops[i];
1300                 dst->t_iops[i]  += je->t_iops[i];
1301                 dst->rate[i]    += je->rate[i];
1302                 dst->iops[i]    += je->iops[i];
1303         }
1304
1305         dst->elapsed_sec        += je->elapsed_sec;
1306
1307         if (je->eta_sec > dst->eta_sec)
1308                 dst->eta_sec = je->eta_sec;
1309
1310         dst->nr_threads         += je->nr_threads;
1311
1312         /*
1313          * This wont be correct for multiple strings, but at least it
1314          * works for the basic cases.
1315          */
1316         strcpy((char *) dst->run_str, (char *) je->run_str);
1317 }
1318
1319 static bool remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1320 {
1321         struct fio_net_cmd_reply *reply = NULL;
1322         struct flist_head *entry;
1323
1324         flist_for_each(entry, &client->cmd_list) {
1325                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1326
1327                 if (cmd->tag == (uintptr_t) reply)
1328                         break;
1329
1330                 reply = NULL;
1331         }
1332
1333         if (!reply) {
1334                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1335                 return false;
1336         }
1337
1338         flist_del(&reply->list);
1339         cmd->tag = reply->saved_tag;
1340         free(reply);
1341         return true;
1342 }
1343
1344 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1345 {
1346         do {
1347                 struct fio_net_cmd_reply *reply = NULL;
1348                 struct flist_head *entry;
1349
1350                 flist_for_each(entry, &client->cmd_list) {
1351                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1352
1353                         if (tag == (uintptr_t) reply)
1354                                 break;
1355
1356                         reply = NULL;
1357                 }
1358
1359                 if (!reply)
1360                         break;
1361
1362                 usleep(1000);
1363         } while (1);
1364
1365         return 0;
1366 }
1367
1368 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1369 {
1370         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1371         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1372
1373         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1374
1375         assert(client->eta_in_flight == eta);
1376
1377         client->eta_in_flight = NULL;
1378         flist_del_init(&client->eta_list);
1379         client->eta_timeouts = 0;
1380
1381         if (client->ops->jobs_eta)
1382                 client->ops->jobs_eta(client, je);
1383
1384         fio_client_sum_jobs_eta(&eta->eta, je);
1385         fio_client_dec_jobs_eta(eta, client->ops->eta);
1386 }
1387
1388 static void client_flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
1389                                       uint64_t sample_size)
1390 {
1391         struct io_sample *s;
1392         int log_offset;
1393         uint64_t i, j, nr_samples;
1394         struct io_u_plat_entry *entry;
1395         uint64_t *io_u_plat;
1396
1397         int stride = 1 << hist_coarseness;
1398
1399         if (!sample_size)
1400                 return;
1401
1402         s = __get_sample(samples, 0, 0);
1403         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
1404
1405         nr_samples = sample_size / __log_entry_sz(log_offset);
1406
1407         for (i = 0; i < nr_samples; i++) {
1408
1409                 s = (struct io_sample *)((char *)__get_sample(samples, log_offset, i) +
1410                         i * sizeof(struct io_u_plat_entry));
1411
1412                 entry = s->data.plat_entry;
1413                 io_u_plat = entry->io_u_plat;
1414
1415                 fprintf(f, "%lu, %u, %llu, ", (unsigned long) s->time,
1416                                                 io_sample_ddir(s), (unsigned long long) s->bs);
1417                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
1418                         fprintf(f, "%llu, ", (unsigned long long)hist_sum(j, stride, io_u_plat, NULL));
1419                 }
1420                 fprintf(f, "%llu\n", (unsigned long long)
1421                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat, NULL));
1422
1423         }
1424 }
1425
1426 static int fio_client_handle_iolog(struct fio_client *client,
1427                                    struct fio_net_cmd *cmd)
1428 {
1429         struct cmd_iolog_pdu *pdu = NULL;
1430         bool store_direct;
1431         char *log_pathname = NULL;
1432         int ret = 0;
1433
1434         pdu = convert_iolog(cmd, &store_direct);
1435         if (!pdu) {
1436                 log_err("fio: failed converting IO log\n");
1437                 ret = 1;
1438                 goto out;
1439         }
1440
1441         /* allocate buffer big enough for next sprintf() call */
1442         log_pathname = malloc(10 + strlen((char *)pdu->name) +
1443                         strlen(client->hostname));
1444         if (!log_pathname) {
1445                 log_err("fio: memory allocation of unique pathname failed\n");
1446                 ret = -1;
1447                 goto out;
1448         }
1449         /* generate a unique pathname for the log file using hostname */
1450         sprintf(log_pathname, "%s.%s", pdu->name, client->hostname);
1451
1452         if (store_direct) {
1453                 ssize_t wrote;
1454                 size_t sz;
1455                 int fd;
1456
1457                 fd = open((const char *) log_pathname,
1458                                 O_WRONLY | O_CREAT | O_TRUNC, 0644);
1459                 if (fd < 0) {
1460                         log_err("fio: open log %s: %s\n",
1461                                 log_pathname, strerror(errno));
1462                         ret = 1;
1463                         goto out;
1464                 }
1465
1466                 sz = cmd->pdu_len - sizeof(*pdu);
1467                 wrote = write(fd, pdu->samples, sz);
1468                 close(fd);
1469
1470                 if (wrote != sz) {
1471                         log_err("fio: short write on compressed log\n");
1472                         ret = 1;
1473                         goto out;
1474                 }
1475
1476                 ret = 0;
1477         } else {
1478                 FILE *f;
1479                 f = fopen((const char *) log_pathname, "w");
1480                 if (!f) {
1481                         log_err("fio: fopen log %s : %s\n",
1482                                 log_pathname, strerror(errno));
1483                         ret = 1;
1484                         goto out;
1485                 }
1486
1487                 if (pdu->log_type == IO_LOG_TYPE_HIST) {
1488                         client_flush_hist_samples(f, pdu->log_hist_coarseness, pdu->samples,
1489                                            pdu->nr_samples * sizeof(struct io_sample));
1490                 } else {
1491                         flush_samples(f, pdu->samples,
1492                                         pdu->nr_samples * sizeof(struct io_sample));
1493                 }
1494                 fclose(f);
1495                 ret = 0;
1496         }
1497
1498 out:
1499         if (pdu && pdu != (void *) cmd->payload)
1500                 free(pdu);
1501
1502         if (log_pathname)
1503                 free(log_pathname);
1504
1505         return ret;
1506 }
1507
1508 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1509 {
1510         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1511         const char *os, *arch;
1512         char bit[16];
1513
1514         os = fio_get_os_string(probe->os);
1515         if (!os)
1516                 os = "unknown";
1517
1518         arch = fio_get_arch_string(probe->arch);
1519         if (!arch)
1520                 os = "unknown";
1521
1522         sprintf(bit, "%d-bit", probe->bpp * 8);
1523         probe->flags = le64_to_cpu(probe->flags);
1524
1525         if (output_format & FIO_OUTPUT_NORMAL) {
1526                 log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1527                         probe->hostname, probe->bigendian, bit, os, arch,
1528                         probe->fio_version, (unsigned long) probe->flags);
1529         }
1530
1531         if (!client->name)
1532                 client->name = strdup((char *) probe->hostname);
1533 }
1534
1535 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1536 {
1537         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1538
1539         client->state = Client_started;
1540         client->jobs = le32_to_cpu(pdu->jobs);
1541         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1542
1543         if (client->jobs) {
1544                 int i;
1545
1546                 if (client->opt_lists)
1547                         free(client->opt_lists);
1548
1549                 client->opt_lists = malloc(client->jobs * sizeof(struct flist_head));
1550                 for (i = 0; i < client->jobs; i++)
1551                         INIT_FLIST_HEAD(&client->opt_lists[i]);
1552         }
1553
1554         sum_stat_clients += client->nr_stat;
1555 }
1556
1557 static void handle_stop(struct fio_client *client)
1558 {
1559         if (client->error)
1560                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1561 }
1562
1563 static void convert_stop(struct fio_net_cmd *cmd)
1564 {
1565         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1566
1567         pdu->error = le32_to_cpu(pdu->error);
1568 }
1569
1570 static void convert_text(struct fio_net_cmd *cmd)
1571 {
1572         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1573
1574         pdu->level      = le32_to_cpu(pdu->level);
1575         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1576         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1577         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1578 }
1579
1580 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1581                                               struct cmd_iolog_pdu *pdu)
1582 {
1583 #ifdef CONFIG_ZLIB
1584         struct cmd_iolog_pdu *ret;
1585         z_stream stream;
1586         uint64_t nr_samples;
1587         size_t total;
1588         char *p;
1589
1590         stream.zalloc = Z_NULL;
1591         stream.zfree = Z_NULL;
1592         stream.opaque = Z_NULL;
1593         stream.avail_in = 0;
1594         stream.next_in = Z_NULL;
1595
1596         if (inflateInit(&stream) != Z_OK)
1597                 return NULL;
1598
1599         /*
1600          * Get header first, it's not compressed
1601          */
1602         nr_samples = le64_to_cpu(pdu->nr_samples);
1603
1604         if (pdu->log_type == IO_LOG_TYPE_HIST)
1605                 total = nr_samples * (__log_entry_sz(le32_to_cpu(pdu->log_offset)) +
1606                                         sizeof(struct io_u_plat_entry));
1607         else
1608                 total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1609         ret = malloc(total + sizeof(*pdu));
1610         ret->nr_samples = nr_samples;
1611
1612         memcpy(ret, pdu, sizeof(*pdu));
1613
1614         p = (char *) ret + sizeof(*pdu);
1615
1616         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1617         stream.next_in = (void *)((char *) pdu + sizeof(*pdu));
1618         while (stream.avail_in) {
1619                 unsigned int this_chunk = 65536;
1620                 unsigned int this_len;
1621                 int err;
1622
1623                 if (this_chunk > total)
1624                         this_chunk = total;
1625
1626                 stream.avail_out = this_chunk;
1627                 stream.next_out = (void *)p;
1628                 err = inflate(&stream, Z_NO_FLUSH);
1629                 /* may be Z_OK, or Z_STREAM_END */
1630                 if (err < 0) {
1631                         /*
1632                          * Z_STREAM_ERROR and Z_BUF_ERROR can safely be
1633                          * ignored */
1634                         if (err == Z_STREAM_ERROR || err == Z_BUF_ERROR)
1635                                 break;
1636                         log_err("fio: inflate error %d\n", err);
1637                         free(ret);
1638                         ret = NULL;
1639                         goto err;
1640                 }
1641
1642                 this_len = this_chunk - stream.avail_out;
1643                 p += this_len;
1644                 total -= this_len;
1645         }
1646
1647 err:
1648         inflateEnd(&stream);
1649         return ret;
1650 #else
1651         return NULL;
1652 #endif
1653 }
1654
1655 /*
1656  * This has been compressed on the server side, since it can be big.
1657  * Uncompress here.
1658  */
1659 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd,
1660                                            bool *store_direct)
1661 {
1662         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1663         struct cmd_iolog_pdu *ret;
1664         uint64_t i;
1665         int compressed;
1666         void *samples;
1667
1668         *store_direct = false;
1669
1670         /*
1671          * Convert if compressed and we support it. If it's not
1672          * compressed, we need not do anything.
1673          */
1674         compressed = le32_to_cpu(pdu->compressed);
1675         if (compressed == XMIT_COMPRESSED) {
1676 #ifndef CONFIG_ZLIB
1677                 log_err("fio: server sent compressed data by mistake\n");
1678                 return NULL;
1679 #endif
1680                 ret = convert_iolog_gz(cmd, pdu);
1681                 if (!ret) {
1682                         log_err("fio: failed decompressing log\n");
1683                         return NULL;
1684                 }
1685         } else if (compressed == STORE_COMPRESSED) {
1686                 *store_direct = true;
1687                 ret = pdu;
1688         } else
1689                 ret = pdu;
1690
1691         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1692         ret->thread_number      = le32_to_cpu(ret->thread_number);
1693         ret->log_type           = le32_to_cpu(ret->log_type);
1694         ret->compressed         = le32_to_cpu(ret->compressed);
1695         ret->log_offset         = le32_to_cpu(ret->log_offset);
1696         ret->log_prio           = le32_to_cpu(ret->log_prio);
1697         ret->log_hist_coarseness = le32_to_cpu(ret->log_hist_coarseness);
1698
1699         if (*store_direct)
1700                 return ret;
1701
1702         samples = &ret->samples[0];
1703         for (i = 0; i < ret->nr_samples; i++) {
1704                 struct io_sample *s;
1705
1706                 s = __get_sample(samples, ret->log_offset, i);
1707                 if (ret->log_type == IO_LOG_TYPE_HIST)
1708                         s = (struct io_sample *)((char *)s + sizeof(struct io_u_plat_entry) * i);
1709
1710                 s->time         = le64_to_cpu(s->time);
1711                 if (ret->log_type != IO_LOG_TYPE_HIST)
1712                         s->data.val     = le64_to_cpu(s->data.val);
1713                 s->__ddir       = __le32_to_cpu(s->__ddir);
1714                 s->bs           = le64_to_cpu(s->bs);
1715                 s->priority     = le16_to_cpu(s->priority);
1716
1717                 if (ret->log_offset) {
1718                         struct io_sample_offset *so = (void *) s;
1719
1720                         so->offset = le64_to_cpu(so->offset);
1721                 }
1722
1723                 if (ret->log_type == IO_LOG_TYPE_HIST) {
1724                         s->data.plat_entry = (struct io_u_plat_entry *)(((char *)s) + sizeof(*s));
1725                         s->data.plat_entry->list.next = NULL;
1726                         s->data.plat_entry->list.prev = NULL;
1727                 }
1728         }
1729
1730         return ret;
1731 }
1732
1733 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1734                            size_t size, uint64_t tag)
1735 {
1736         rep->error = cpu_to_le32(rep->error);
1737         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1738 }
1739
1740 static int fio_send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1741                          uint64_t tag)
1742 {
1743         struct cmd_sendfile_reply *rep;
1744         struct stat sb;
1745         size_t size;
1746         int fd;
1747
1748         size = sizeof(*rep);
1749         rep = malloc(size);
1750
1751         if (stat((char *)pdu->path, &sb) < 0) {
1752 fail:
1753                 rep->error = errno;
1754                 sendfile_reply(client->fd, rep, size, tag);
1755                 free(rep);
1756                 return 1;
1757         }
1758
1759         size += sb.st_size;
1760         rep = realloc(rep, size);
1761         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1762
1763         fd = open((char *)pdu->path, O_RDONLY);
1764         if (fd == -1 )
1765                 goto fail;
1766
1767         rep->error = read_data(fd, &rep->data, sb.st_size);
1768         sendfile_reply(client->fd, rep, size, tag);
1769         free(rep);
1770         close(fd);
1771         return 0;
1772 }
1773
1774 int fio_handle_client(struct fio_client *client)
1775 {
1776         struct client_ops const *ops = client->ops;
1777         struct fio_net_cmd *cmd;
1778
1779         dprint(FD_NET, "client: handle %s\n", client->hostname);
1780
1781         cmd = fio_net_recv_cmd(client->fd, true);
1782         if (!cmd)
1783                 return 0;
1784
1785         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1786                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1787
1788         client->last_cmd = cmd->opcode;
1789
1790         switch (cmd->opcode) {
1791         case FIO_NET_CMD_QUIT:
1792                 if (ops->quit)
1793                         ops->quit(client, cmd);
1794                 remove_client(client);
1795                 break;
1796         case FIO_NET_CMD_TEXT:
1797                 convert_text(cmd);
1798                 ops->text(client, cmd);
1799                 break;
1800         case FIO_NET_CMD_DU: {
1801                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1802
1803                 convert_dus(&du->dus);
1804                 convert_agg(&du->agg);
1805
1806                 ops->disk_util(client, cmd);
1807                 break;
1808                 }
1809         case FIO_NET_CMD_TS: {
1810                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1811                 uint64_t offset;
1812                 int i;
1813
1814                 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1815                         if (le32_to_cpu(p->ts.nr_clat_prio[i])) {
1816                                 offset = le64_to_cpu(p->ts.clat_prio_offset[i]);
1817                                 p->ts.clat_prio[i] =
1818                                         (struct clat_prio_stat *)((char *)p + offset);
1819                         }
1820                 }
1821
1822                 dprint(FD_NET, "client: ts->ss_state = %u\n", (unsigned int) le32_to_cpu(p->ts.ss_state));
1823                 if (le32_to_cpu(p->ts.ss_state) & FIO_SS_DATA) {
1824                         dprint(FD_NET, "client: received steadystate ring buffers\n");
1825
1826                         offset = le64_to_cpu(p->ts.ss_iops_data_offset);
1827                         p->ts.ss_iops_data = (uint64_t *)((char *)p + offset);
1828
1829                         offset = le64_to_cpu(p->ts.ss_bw_data_offset);
1830                         p->ts.ss_bw_data = (uint64_t *)((char *)p + offset);
1831                 }
1832
1833                 convert_ts(&p->ts, &p->ts);
1834                 convert_gs(&p->rs, &p->rs);
1835
1836                 ops->thread_status(client, cmd);
1837                 break;
1838                 }
1839         case FIO_NET_CMD_GS: {
1840                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1841
1842                 convert_gs(gs, gs);
1843
1844                 ops->group_stats(client, cmd);
1845                 break;
1846                 }
1847         case FIO_NET_CMD_ETA: {
1848                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1849
1850                 if (!remove_reply_cmd(client, cmd))
1851                         break;
1852                 convert_jobs_eta(je);
1853                 handle_eta(client, cmd);
1854                 break;
1855                 }
1856         case FIO_NET_CMD_PROBE:
1857                 remove_reply_cmd(client, cmd);
1858                 ops->probe(client, cmd);
1859                 break;
1860         case FIO_NET_CMD_SERVER_START:
1861                 client->state = Client_running;
1862                 if (ops->job_start)
1863                         ops->job_start(client, cmd);
1864                 break;
1865         case FIO_NET_CMD_START: {
1866                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1867
1868                 pdu->jobs = le32_to_cpu(pdu->jobs);
1869                 ops->start(client, cmd);
1870                 break;
1871                 }
1872         case FIO_NET_CMD_STOP: {
1873                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1874
1875                 convert_stop(cmd);
1876                 client->state = Client_stopped;
1877                 client->error = le32_to_cpu(pdu->error);
1878                 client->signal = le32_to_cpu(pdu->signal);
1879                 ops->stop(client);
1880                 break;
1881                 }
1882         case FIO_NET_CMD_ADD_JOB: {
1883                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1884
1885                 client->thread_number = le32_to_cpu(pdu->thread_number);
1886                 client->groupid = le32_to_cpu(pdu->groupid);
1887
1888                 if (ops->add_job)
1889                         ops->add_job(client, cmd);
1890                 break;
1891                 }
1892         case FIO_NET_CMD_IOLOG:
1893                 fio_client_handle_iolog(client, cmd);
1894                 break;
1895         case FIO_NET_CMD_UPDATE_JOB:
1896                 ops->update_job(client, cmd);
1897                 remove_reply_cmd(client, cmd);
1898                 break;
1899         case FIO_NET_CMD_VTRIGGER: {
1900                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1901                 char buf[128];
1902                 int off = 0;
1903
1904                 if (aux_path) {
1905                         strcpy(buf, aux_path);
1906                         off = strlen(buf);
1907                 }
1908
1909                 __verify_save_state(pdu, server_name(client, &buf[off], sizeof(buf) - off));
1910                 exec_trigger(trigger_cmd);
1911                 break;
1912                 }
1913         case FIO_NET_CMD_SENDFILE: {
1914                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1915                 fio_send_file(client, pdu, cmd->tag);
1916                 break;
1917                 }
1918         case FIO_NET_CMD_JOB_OPT: {
1919                 handle_job_opt(client, cmd);
1920                 break;
1921         }
1922         default:
1923                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1924                 break;
1925         }
1926
1927         free(cmd);
1928         return 1;
1929 }
1930
1931 int fio_clients_send_trigger(const char *cmd)
1932 {
1933         struct flist_head *entry;
1934         struct fio_client *client;
1935         size_t slen;
1936
1937         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1938
1939         if (!cmd)
1940                 slen = 0;
1941         else
1942                 slen = strlen(cmd);
1943
1944         flist_for_each(entry, &client_list) {
1945                 struct cmd_vtrigger_pdu *pdu;
1946
1947                 client = flist_entry(entry, struct fio_client, list);
1948
1949                 pdu = malloc(sizeof(*pdu) + slen);
1950                 pdu->len = cpu_to_le16((uint16_t) slen);
1951                 if (slen)
1952                         memcpy(pdu->cmd, cmd, slen);
1953                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1954                                         sizeof(*pdu) + slen, NULL, NULL);
1955                 free(pdu);
1956         }
1957
1958         return 0;
1959 }
1960
1961 static void request_client_etas(struct client_ops const *ops)
1962 {
1963         struct fio_client *client;
1964         struct flist_head *entry;
1965         struct client_eta *eta;
1966         int skipped = 0;
1967
1968         if (eta_print == FIO_ETA_NEVER)
1969                 return;
1970
1971         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1972
1973         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1974         eta->pending = nr_clients;
1975
1976         flist_for_each(entry, &client_list) {
1977                 client = flist_entry(entry, struct fio_client, list);
1978
1979                 if (!flist_empty(&client->eta_list)) {
1980                         skipped++;
1981                         continue;
1982                 }
1983                 if (client->state != Client_running)
1984                         continue;
1985
1986                 assert(!client->eta_in_flight);
1987                 flist_add_tail(&client->eta_list, &eta_list);
1988                 client->eta_in_flight = eta;
1989                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1990                                         (uintptr_t) eta, &client->cmd_list);
1991         }
1992
1993         while (skipped--) {
1994                 if (!fio_client_dec_jobs_eta(eta, ops->eta))
1995                         break;
1996         }
1997
1998         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1999 }
2000
2001 /*
2002  * A single SEND_ETA timeout isn't fatal. Attempt to recover.
2003  */
2004 static int handle_cmd_timeout(struct fio_client *client,
2005                               struct fio_net_cmd_reply *reply)
2006 {
2007         uint16_t reply_opcode = reply->opcode;
2008
2009         flist_del(&reply->list);
2010         free(reply);
2011
2012         if (reply_opcode != FIO_NET_CMD_SEND_ETA)
2013                 return 1;
2014
2015         log_info("client <%s>: timeout on SEND_ETA\n", client->hostname);
2016
2017         flist_del_init(&client->eta_list);
2018         if (client->eta_in_flight) {
2019                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
2020                 client->eta_in_flight = NULL;
2021         }
2022
2023         /*
2024          * If we fail 5 in a row, give up...
2025          */
2026         if (client->eta_timeouts++ > 5)
2027                 return 1;
2028
2029         return 0;
2030 }
2031
2032 static int client_check_cmd_timeout(struct fio_client *client,
2033                                     struct timespec *now)
2034 {
2035         struct fio_net_cmd_reply *reply;
2036         struct flist_head *entry, *tmp;
2037         int ret = 0;
2038
2039         flist_for_each_safe(entry, tmp, &client->cmd_list) {
2040                 unsigned int op;
2041
2042                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
2043
2044                 if (mtime_since(&reply->ts, now) < FIO_NET_CLIENT_TIMEOUT)
2045                         continue;
2046
2047                 op = reply->opcode;
2048                 if (!handle_cmd_timeout(client, reply))
2049                         continue;
2050
2051                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
2052                                                 fio_server_op(op));
2053                 ret = 1;
2054         }
2055
2056         return flist_empty(&client->cmd_list) && ret;
2057 }
2058
2059 static int fio_check_clients_timed_out(void)
2060 {
2061         struct fio_client *client;
2062         struct flist_head *entry, *tmp;
2063         struct timespec ts;
2064         int ret = 0;
2065
2066         fio_gettime(&ts, NULL);
2067
2068         flist_for_each_safe(entry, tmp, &client_list) {
2069                 client = flist_entry(entry, struct fio_client, list);
2070
2071                 if (flist_empty(&client->cmd_list))
2072                         continue;
2073
2074                 if (!client_check_cmd_timeout(client, &ts))
2075                         continue;
2076
2077                 if (client->ops->timed_out)
2078                         client->ops->timed_out(client);
2079                 else
2080                         log_err("fio: client %s timed out\n", client->hostname);
2081
2082                 if (client->last_cmd != FIO_NET_CMD_VTRIGGER)
2083                         client->error = ETIMEDOUT;
2084                 else
2085                         log_info("fio: ignoring timeout due to vtrigger\n");
2086                 remove_client(client);
2087                 ret = 1;
2088         }
2089
2090         return ret;
2091 }
2092
2093 int fio_handle_clients(struct client_ops const *ops)
2094 {
2095         struct pollfd *pfds;
2096         int i, ret = 0, retval = 0;
2097
2098         fio_gettime(&eta_ts, NULL);
2099
2100         pfds = malloc(nr_clients * sizeof(struct pollfd));
2101
2102         init_thread_stat(&client_ts);
2103         init_group_run_stat(&client_gs);
2104
2105         while (!exit_backend && nr_clients) {
2106                 struct flist_head *entry, *tmp;
2107                 struct fio_client *client;
2108
2109                 i = 0;
2110                 flist_for_each_safe(entry, tmp, &client_list) {
2111                         client = flist_entry(entry, struct fio_client, list);
2112
2113                         if (!client->sent_job && !client->ops->stay_connected &&
2114                             flist_empty(&client->cmd_list)) {
2115                                 remove_client(client);
2116                                 continue;
2117                         }
2118
2119                         pfds[i].fd = client->fd;
2120                         pfds[i].events = POLLIN;
2121                         i++;
2122                 }
2123
2124                 if (!nr_clients)
2125                         break;
2126
2127                 assert(i == nr_clients);
2128
2129                 do {
2130                         struct timespec ts;
2131                         int timeout;
2132
2133                         fio_gettime(&ts, NULL);
2134                         if (eta_time_within_slack(mtime_since(&eta_ts, &ts))) {
2135                                 request_client_etas(ops);
2136                                 memcpy(&eta_ts, &ts, sizeof(ts));
2137
2138                                 if (fio_check_clients_timed_out())
2139                                         break;
2140                         }
2141
2142                         check_trigger_file();
2143
2144                         timeout = min(100u, ops->eta_msec);
2145
2146                         ret = poll(pfds, nr_clients, timeout);
2147                         if (ret < 0) {
2148                                 if (errno == EINTR)
2149                                         continue;
2150                                 log_err("fio: poll clients: %s\n", strerror(errno));
2151                                 break;
2152                         } else if (!ret)
2153                                 continue;
2154                 } while (ret <= 0);
2155
2156                 for (i = 0; i < nr_clients; i++) {
2157                         if (!(pfds[i].revents & POLLIN))
2158                                 continue;
2159
2160                         client = find_client_by_fd(pfds[i].fd);
2161                         if (!client) {
2162                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
2163                                 continue;
2164                         }
2165                         if (!fio_handle_client(client)) {
2166                                 log_info("client: host=%s disconnected\n",
2167                                                 client->hostname);
2168                                 remove_client(client);
2169                                 retval = 1;
2170                         } else if (client->error)
2171                                 retval = 1;
2172                         fio_put_client(client);
2173                 }
2174         }
2175
2176         log_info_buf(allclients.buf, allclients.buflen);
2177         buf_output_free(&allclients);
2178
2179         fio_client_json_fini();
2180
2181         free_clat_prio_stats(&client_ts);
2182         free(pfds);
2183         return retval || error_clients;
2184 }
2185
2186 static void client_display_thread_status(struct jobs_eta *je)
2187 {
2188         if (!(output_format & FIO_OUTPUT_JSON))
2189                 display_thread_status(je);
2190 }