client.c

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