client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <limits.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <sys/poll.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <sys/wait.h>
  11 #include <sys/socket.h>
  12 #include <sys/un.h>
  13 #include <netinet/in.h>
  14 #include <arpa/inet.h>
  15 #include <netdb.h>
  16 #include <signal.h>
  17 #ifdef CONFIG_ZLIB
  18 #include <zlib.h>
  19 #endif
  20
  21 #include "fio.h"
  22 #include "client.h"
  23 #include "server.h"
  24 #include "flist.h"
  25 #include "hash.h"
  26 #include "verify.h"
  27
  28 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  31 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  32 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  33 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  34 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  35
  36 struct client_ops fio_client_ops = {
  37         .text           = handle_text,
  38         .disk_util      = handle_du,
  39         .thread_status  = handle_ts,
  40         .group_stats    = handle_gs,
  41         .stop           = handle_stop,
  42         .start          = handle_start,
  43         .eta            = display_thread_status,
  44         .probe          = handle_probe,
  45         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  46         .client_type    = FIO_CLIENT_TYPE_CLI,
  47 };
  48
  49 static struct timeval eta_tv;
  50
  51 static FLIST_HEAD(client_list);
  52 static FLIST_HEAD(eta_list);
  53
  54 static FLIST_HEAD(arg_list);
  55
  56 struct thread_stat client_ts;
  57 struct group_run_stats client_gs;
  58 int sum_stat_clients;
  59
  60 static int sum_stat_nr;
  61 static struct json_object *root = NULL;
  62 static struct json_array *clients_array = NULL;
  63 static struct json_array *du_array = NULL;
  64
  65 #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_files) {
 145                 struct client_file *cf = &client->files[--client->nr_files];
 146
 147                 free(cf->file);
 148         }
 149         if (client->files)
 150                 free(client->files);
 151
 152         if (!client->did_stat)
 153                 sum_stat_clients--;
 154
 155         free(client);
 156 }
 157
 158 static void remove_client(struct fio_client *client)
 159 {
 160         assert(client->refs);
 161
 162         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 163
 164         if (!flist_empty(&client->list))
 165                 flist_del_init(&client->list);
 166
 167         fio_client_remove_hash(client);
 168
 169         if (!flist_empty(&client->eta_list)) {
 170                 flist_del_init(&client->eta_list);
 171                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 172         }
 173
 174         close(client->fd);
 175         client->fd = -1;
 176
 177         if (client->ops->removed)
 178                 client->ops->removed(client);
 179
 180         nr_clients--;
 181         fio_put_client(client);
 182 }
 183
 184 struct fio_client *fio_get_client(struct fio_client *client)
 185 {
 186         client->refs++;
 187         return client;
 188 }
 189
 190 static void __fio_client_add_cmd_option(struct fio_client *client,
 191                                         const char *opt)
 192 {
 193         int index;
 194
 195         index = client->argc++;
 196         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 197         client->argv[index] = strdup(opt);
 198         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 199 }
 200
 201 void fio_client_add_cmd_option(void *cookie, const char *opt)
 202 {
 203         struct fio_client *client = cookie;
 204         struct flist_head *entry;
 205
 206         if (!client || !opt)
 207                 return;
 208
 209         __fio_client_add_cmd_option(client, opt);
 210
 211         /*
 212          * Duplicate arguments to shared client group
 213          */
 214         flist_for_each(entry, &arg_list) {
 215                 client = flist_entry(entry, struct fio_client, arg_list);
 216
 217                 __fio_client_add_cmd_option(client, opt);
 218         }
 219 }
 220
 221 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 222                                            const char *hostname, int type,
 223                                            int port)
 224 {
 225         struct fio_client *client;
 226
 227         client = malloc(sizeof(*client));
 228         memset(client, 0, sizeof(*client));
 229
 230         INIT_FLIST_HEAD(&client->list);
 231         INIT_FLIST_HEAD(&client->hash_list);
 232         INIT_FLIST_HEAD(&client->arg_list);
 233         INIT_FLIST_HEAD(&client->eta_list);
 234         INIT_FLIST_HEAD(&client->cmd_list);
 235
 236         client->hostname = strdup(hostname);
 237
 238         if (type == Fio_client_socket)
 239                 client->is_sock = 1;
 240         else {
 241                 int ipv6;
 242
 243                 ipv6 = type == Fio_client_ipv6;
 244                 if (fio_server_parse_host(hostname, ipv6,
 245                                                 &client->addr.sin_addr,
 246                                                 &client->addr6.sin6_addr))
 247                         goto err;
 248
 249                 client->port = port;
 250         }
 251
 252         client->fd = -1;
 253         client->ops = ops;
 254         client->refs = 1;
 255         client->type = ops->client_type;
 256
 257         __fio_client_add_cmd_option(client, "fio");
 258
 259         flist_add(&client->list, &client_list);
 260         nr_clients++;
 261         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 262         return client;
 263 err:
 264         free(client);
 265         return NULL;
 266 }
 267
 268 int fio_client_add_ini_file(void *cookie, const char *ini_file, int remote)
 269 {
 270         struct fio_client *client = cookie;
 271         struct client_file *cf;
 272         size_t new_size;
 273         void *new_files;
 274
 275         if (!client)
 276                 return 1;
 277
 278         dprint(FD_NET, "client <%s>: add ini %s\n", client->hostname, ini_file);
 279
 280         new_size = (client->nr_files + 1) * sizeof(struct client_file);
 281         new_files = realloc(client->files, new_size);
 282         if (!new_files)
 283                 return 1;
 284
 285         client->files = new_files;
 286         cf = &client->files[client->nr_files];
 287         cf->file = strdup(ini_file);
 288         cf->remote = remote;
 289         client->nr_files++;
 290         return 0;
 291 }
 292
 293 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 294 {
 295         struct fio_client *existing = *cookie;
 296         struct fio_client *client;
 297
 298         if (existing) {
 299                 /*
 300                  * We always add our "exec" name as the option, hence 1
 301                  * means empty.
 302                  */
 303                 if (existing->argc == 1)
 304                         flist_add_tail(&existing->arg_list, &arg_list);
 305                 else {
 306                         while (!flist_empty(&arg_list))
 307                                 flist_del_init(arg_list.next);
 308                 }
 309         }
 310
 311         client = malloc(sizeof(*client));
 312         memset(client, 0, sizeof(*client));
 313
 314         INIT_FLIST_HEAD(&client->list);
 315         INIT_FLIST_HEAD(&client->hash_list);
 316         INIT_FLIST_HEAD(&client->arg_list);
 317         INIT_FLIST_HEAD(&client->eta_list);
 318         INIT_FLIST_HEAD(&client->cmd_list);
 319
 320         if (fio_server_parse_string(hostname, &client->hostname,
 321                                         &client->is_sock, &client->port,
 322                                         &client->addr.sin_addr,
 323                                         &client->addr6.sin6_addr,
 324                                         &client->ipv6))
 325                 return -1;
 326
 327         client->fd = -1;
 328         client->ops = ops;
 329         client->refs = 1;
 330         client->type = ops->client_type;
 331
 332         __fio_client_add_cmd_option(client, "fio");
 333
 334         flist_add(&client->list, &client_list);
 335         nr_clients++;
 336         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 337         *cookie = client;
 338         return 0;
 339 }
 340
 341 static const char *server_name(struct fio_client *client, char *buf,
 342                                size_t bufsize)
 343 {
 344         const char *from;
 345
 346         if (client->ipv6)
 347                 from = inet_ntop(AF_INET6, (struct sockaddr *) &client->addr6.sin6_addr, buf, bufsize);
 348         else if (client->is_sock)
 349                 from = "sock";
 350         else
 351                 from = inet_ntop(AF_INET, (struct sockaddr *) &client->addr.sin_addr, buf, bufsize);
 352
 353         return from;
 354 }
 355
 356 static void probe_client(struct fio_client *client)
 357 {
 358         struct cmd_client_probe_pdu pdu;
 359         uint64_t tag;
 360         char buf[64];
 361
 362         dprint(FD_NET, "client: send probe\n");
 363
 364 #ifdef CONFIG_ZLIB
 365         pdu.flags = __le64_to_cpu(FIO_PROBE_FLAG_ZLIB);
 366 #else
 367         pdu.flags = 0;
 368 #endif
 369
 370         strcpy((char *) pdu.server, server_name(client, buf, sizeof(buf)));
 371
 372         fio_net_send_cmd(client->fd, FIO_NET_CMD_PROBE, &pdu, sizeof(pdu), &tag, &client->cmd_list);
 373 }
 374
 375 static int fio_client_connect_ip(struct fio_client *client)
 376 {
 377         struct sockaddr *addr;
 378         socklen_t socklen;
 379         int fd, domain;
 380
 381         if (client->ipv6) {
 382                 client->addr6.sin6_family = AF_INET6;
 383                 client->addr6.sin6_port = htons(client->port);
 384                 domain = AF_INET6;
 385                 addr = (struct sockaddr *) &client->addr6;
 386                 socklen = sizeof(client->addr6);
 387         } else {
 388                 client->addr.sin_family = AF_INET;
 389                 client->addr.sin_port = htons(client->port);
 390                 domain = AF_INET;
 391                 addr = (struct sockaddr *) &client->addr;
 392                 socklen = sizeof(client->addr);
 393         }
 394
 395         fd = socket(domain, SOCK_STREAM, 0);
 396         if (fd < 0) {
 397                 int ret = -errno;
 398
 399                 log_err("fio: socket: %s\n", strerror(errno));
 400                 return ret;
 401         }
 402
 403         if (connect(fd, addr, socklen) < 0) {
 404                 int ret = -errno;
 405
 406                 log_err("fio: connect: %s\n", strerror(errno));
 407                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 408                                                                 client->port);
 409                 close(fd);
 410                 return ret;
 411         }
 412
 413         return fd;
 414 }
 415
 416 static int fio_client_connect_sock(struct fio_client *client)
 417 {
 418         struct sockaddr_un *addr = &client->addr_un;
 419         socklen_t len;
 420         int fd;
 421
 422         memset(addr, 0, sizeof(*addr));
 423         addr->sun_family = AF_UNIX;
 424         strncpy(addr->sun_path, client->hostname, sizeof(addr->sun_path) - 1);
 425
 426         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 427         if (fd < 0) {
 428                 int ret = -errno;
 429
 430                 log_err("fio: socket: %s\n", strerror(errno));
 431                 return ret;
 432         }
 433
 434         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 435         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 436                 int ret = -errno;
 437
 438                 log_err("fio: connect; %s\n", strerror(errno));
 439                 close(fd);
 440                 return ret;
 441         }
 442
 443         return fd;
 444 }
 445
 446 int fio_client_connect(struct fio_client *client)
 447 {
 448         int fd;
 449
 450         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 451
 452         if (client->is_sock)
 453                 fd = fio_client_connect_sock(client);
 454         else
 455                 fd = fio_client_connect_ip(client);
 456
 457         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 458
 459         if (fd < 0)
 460                 return fd;
 461
 462         client->fd = fd;
 463         fio_client_add_hash(client);
 464         client->state = Client_connected;
 465
 466         probe_client(client);
 467         return 0;
 468 }
 469
 470 int fio_client_terminate(struct fio_client *client)
 471 {
 472         return fio_net_send_quit(client->fd);
 473 }
 474
 475 void fio_clients_terminate(void)
 476 {
 477         struct flist_head *entry;
 478         struct fio_client *client;
 479
 480         dprint(FD_NET, "client: terminate clients\n");
 481
 482         flist_for_each(entry, &client_list) {
 483                 client = flist_entry(entry, struct fio_client, list);
 484                 fio_client_terminate(client);
 485         }
 486 }
 487
 488 static void sig_int(int sig)
 489 {
 490         dprint(FD_NET, "client: got signal %d\n", sig);
 491         fio_clients_terminate();
 492 }
 493
 494 static void sig_show_status(int sig)
 495 {
 496         show_running_run_stats();
 497 }
 498
 499 static void client_signal_handler(void)
 500 {
 501         struct sigaction act;
 502
 503         memset(&act, 0, sizeof(act));
 504         act.sa_handler = sig_int;
 505         act.sa_flags = SA_RESTART;
 506         sigaction(SIGINT, &act, NULL);
 507
 508         memset(&act, 0, sizeof(act));
 509         act.sa_handler = sig_int;
 510         act.sa_flags = SA_RESTART;
 511         sigaction(SIGTERM, &act, NULL);
 512
 513 /* Windows uses SIGBREAK as a quit signal from other applications */
 514 #ifdef WIN32
 515         memset(&act, 0, sizeof(act));
 516         act.sa_handler = sig_int;
 517         act.sa_flags = SA_RESTART;
 518         sigaction(SIGBREAK, &act, NULL);
 519 #endif
 520
 521         memset(&act, 0, sizeof(act));
 522         act.sa_handler = sig_show_status;
 523         act.sa_flags = SA_RESTART;
 524         sigaction(SIGUSR1, &act, NULL);
 525 }
 526
 527 static int send_client_cmd_line(struct fio_client *client)
 528 {
 529         struct cmd_single_line_pdu *cslp;
 530         struct cmd_line_pdu *clp;
 531         unsigned long offset;
 532         unsigned int *lens;
 533         void *pdu;
 534         size_t mem;
 535         int i, ret;
 536
 537         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 538
 539         lens = malloc(client->argc * sizeof(unsigned int));
 540
 541         /*
 542          * Find out how much mem we need
 543          */
 544         for (i = 0, mem = 0; i < client->argc; i++) {
 545                 lens[i] = strlen(client->argv[i]) + 1;
 546                 mem += lens[i];
 547         }
 548
 549         /*
 550          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 551          */
 552         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 553
 554         pdu = malloc(mem);
 555         clp = pdu;
 556         offset = sizeof(*clp);
 557
 558         for (i = 0; i < client->argc; i++) {
 559                 uint16_t arg_len = lens[i];
 560
 561                 cslp = pdu + offset;
 562                 strcpy((char *) cslp->text, client->argv[i]);
 563                 cslp->len = cpu_to_le16(arg_len);
 564                 offset += sizeof(*cslp) + arg_len;
 565         }
 566
 567         free(lens);
 568         clp->lines = cpu_to_le16(client->argc);
 569         clp->client_type = __cpu_to_le16(client->type);
 570         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, NULL, NULL);
 571         free(pdu);
 572         return ret;
 573 }
 574
 575 int fio_clients_connect(void)
 576 {
 577         struct fio_client *client;
 578         struct flist_head *entry, *tmp;
 579         int ret;
 580
 581 #ifdef WIN32
 582         WSADATA wsd;
 583         WSAStartup(MAKEWORD(2, 2), &wsd);
 584 #endif
 585
 586         dprint(FD_NET, "client: connect all\n");
 587
 588         client_signal_handler();
 589
 590         flist_for_each_safe(entry, tmp, &client_list) {
 591                 client = flist_entry(entry, struct fio_client, list);
 592
 593                 ret = fio_client_connect(client);
 594                 if (ret) {
 595                         remove_client(client);
 596                         continue;
 597                 }
 598
 599                 if (client->argc > 1)
 600                         send_client_cmd_line(client);
 601         }
 602
 603         return !nr_clients;
 604 }
 605
 606 int fio_start_client(struct fio_client *client)
 607 {
 608         dprint(FD_NET, "client: start %s\n", client->hostname);
 609         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 610 }
 611
 612 int fio_start_all_clients(void)
 613 {
 614         struct fio_client *client;
 615         struct flist_head *entry, *tmp;
 616         int ret;
 617
 618         dprint(FD_NET, "client: start all\n");
 619
 620         fio_client_json_init();
 621
 622         flist_for_each_safe(entry, tmp, &client_list) {
 623                 client = flist_entry(entry, struct fio_client, list);
 624
 625                 ret = fio_start_client(client);
 626                 if (ret) {
 627                         remove_client(client);
 628                         continue;
 629                 }
 630         }
 631
 632         return flist_empty(&client_list);
 633 }
 634
 635 static int __fio_client_send_remote_ini(struct fio_client *client,
 636                                         const char *filename)
 637 {
 638         struct cmd_load_file_pdu *pdu;
 639         size_t p_size;
 640         int ret;
 641
 642         dprint(FD_NET, "send remote ini %s to %s\n", filename, client->hostname);
 643
 644         p_size = sizeof(*pdu) + strlen(filename) + 1;
 645         pdu = malloc(p_size);
 646         memset(pdu, 0, p_size);
 647         pdu->name_len = strlen(filename);
 648         strcpy((char *) pdu->file, filename);
 649         pdu->client_type = cpu_to_le16((uint16_t) client->type);
 650
 651         client->sent_job = 1;
 652         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_LOAD_FILE, pdu, p_size,NULL, NULL);
 653         free(pdu);
 654         return ret;
 655 }
 656
 657 /*
 658  * Send file contents to server backend. We could use sendfile(), but to remain
 659  * more portable lets just read/write the darn thing.
 660  */
 661 static int __fio_client_send_local_ini(struct fio_client *client,
 662                                        const char *filename)
 663 {
 664         struct cmd_job_pdu *pdu;
 665         size_t p_size;
 666         struct stat sb;
 667         char *p;
 668         void *buf;
 669         off_t len;
 670         int fd, ret;
 671
 672         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 673
 674         fd = open(filename, O_RDONLY);
 675         if (fd < 0) {
 676                 ret = -errno;
 677                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 678                 return ret;
 679         }
 680
 681         if (fstat(fd, &sb) < 0) {
 682                 ret = -errno;
 683                 log_err("fio: job file stat: %s\n", strerror(errno));
 684                 close(fd);
 685                 return ret;
 686         }
 687
 688         p_size = sb.st_size + sizeof(*pdu);
 689         pdu = malloc(p_size);
 690         buf = pdu->buf;
 691
 692         len = sb.st_size;
 693         p = buf;
 694         do {
 695                 ret = read(fd, p, len);
 696                 if (ret > 0) {
 697                         len -= ret;
 698                         if (!len)
 699                                 break;
 700                         p += ret;
 701                         continue;
 702                 } else if (!ret)
 703                         break;
 704                 else if (errno == EAGAIN || errno == EINTR)
 705                         continue;
 706         } while (1);
 707
 708         if (len) {
 709                 log_err("fio: failed reading job file %s\n", filename);
 710                 close(fd);
 711                 free(pdu);
 712                 return 1;
 713         }
 714
 715         pdu->buf_len = __cpu_to_le32(sb.st_size);
 716         pdu->client_type = cpu_to_le32(client->type);
 717
 718         client->sent_job = 1;
 719         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, pdu, p_size, NULL, NULL);
 720         free(pdu);
 721         close(fd);
 722         return ret;
 723 }
 724
 725 int fio_client_send_ini(struct fio_client *client, const char *filename,
 726                         int remote)
 727 {
 728         int ret;
 729
 730         if (!remote)
 731                 ret = __fio_client_send_local_ini(client, filename);
 732         else
 733                 ret = __fio_client_send_remote_ini(client, filename);
 734
 735         if (!ret)
 736                 client->sent_job = 1;
 737
 738         return ret;
 739 }
 740
 741 static int fio_client_send_cf(struct fio_client *client,
 742                               struct client_file *cf)
 743 {
 744         return fio_client_send_ini(client, cf->file, cf->remote);
 745 }
 746
 747 int fio_clients_send_ini(const char *filename)
 748 {
 749         struct fio_client *client;
 750         struct flist_head *entry, *tmp;
 751
 752         flist_for_each_safe(entry, tmp, &client_list) {
 753                 client = flist_entry(entry, struct fio_client, list);
 754
 755                 if (client->nr_files) {
 756                         int i;
 757
 758                         for (i = 0; i < client->nr_files; i++) {
 759                                 struct client_file *cf;
 760
 761                                 cf = &client->files[i];
 762
 763                                 if (fio_client_send_cf(client, cf)) {
 764                                         remove_client(client);
 765                                         break;
 766                                 }
 767                         }
 768                 }
 769                 if (client->sent_job)
 770                         continue;
 771                 if (!filename || fio_client_send_ini(client, filename, 0))
 772                         remove_client(client);
 773         }
 774
 775         return !nr_clients;
 776 }
 777
 778 int fio_client_update_options(struct fio_client *client,
 779                               struct thread_options *o, uint64_t *tag)
 780 {
 781         struct cmd_add_job_pdu pdu;
 782
 783         pdu.thread_number = cpu_to_le32(client->thread_number);
 784         pdu.groupid = cpu_to_le32(client->groupid);
 785         convert_thread_options_to_net(&pdu.top, o);
 786
 787         return fio_net_send_cmd(client->fd, FIO_NET_CMD_UPDATE_JOB, &pdu, sizeof(pdu), tag, &client->cmd_list);
 788 }
 789
 790 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 791 {
 792         dst->max_val    = le64_to_cpu(src->max_val);
 793         dst->min_val    = le64_to_cpu(src->min_val);
 794         dst->samples    = le64_to_cpu(src->samples);
 795
 796         /*
 797          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 798          */
 799         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 800         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 801 }
 802
 803 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 804 {
 805         int i, j;
 806
 807         dst->error              = le32_to_cpu(src->error);
 808         dst->thread_number      = le32_to_cpu(src->thread_number);
 809         dst->groupid            = le32_to_cpu(src->groupid);
 810         dst->pid                = le32_to_cpu(src->pid);
 811         dst->members            = le32_to_cpu(src->members);
 812         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 813
 814         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 815                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 816                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 817                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 818                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 819         }
 820
 821         dst->usr_time           = le64_to_cpu(src->usr_time);
 822         dst->sys_time           = le64_to_cpu(src->sys_time);
 823         dst->ctx                = le64_to_cpu(src->ctx);
 824         dst->minf               = le64_to_cpu(src->minf);
 825         dst->majf               = le64_to_cpu(src->majf);
 826         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 827         dst->percentile_precision = le64_to_cpu(src->percentile_precision);
 828
 829         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 830                 fio_fp64_t *fps = &src->percentile_list[i];
 831                 fio_fp64_t *fpd = &dst->percentile_list[i];
 832
 833                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 834         }
 835
 836         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 837                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 838                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 839                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 840         }
 841
 842         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 843                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 844                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 845         }
 846
 847         for (i = 0; i < DDIR_RWDIR_CNT; i++)
 848                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 849                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 850
 851         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 852                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 853                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 854                 dst->drop_io_u[i]       = le64_to_cpu(src->drop_io_u[i]);
 855         }
 856
 857         dst->total_submit       = le64_to_cpu(src->total_submit);
 858         dst->total_complete     = le64_to_cpu(src->total_complete);
 859
 860         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 861                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 862                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 863         }
 864
 865         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 866         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 867         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 868         dst->first_error        = le32_to_cpu(src->first_error);
 869         dst->kb_base            = le32_to_cpu(src->kb_base);
 870         dst->unit_base          = le32_to_cpu(src->unit_base);
 871
 872         dst->latency_depth      = le32_to_cpu(src->latency_depth);
 873         dst->latency_target     = le64_to_cpu(src->latency_target);
 874         dst->latency_window     = le64_to_cpu(src->latency_window);
 875         dst->latency_percentile.u.f = fio_uint64_to_double(le64_to_cpu(src->latency_percentile.u.i));
 876 }
 877
 878 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 879 {
 880         int i;
 881
 882         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 883                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 884                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 885                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 886                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 887                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 888                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 889         }
 890
 891         dst->kb_base    = le32_to_cpu(src->kb_base);
 892         dst->unit_base  = le32_to_cpu(src->unit_base);
 893         dst->groupid    = le32_to_cpu(src->groupid);
 894         dst->unified_rw_rep     = le32_to_cpu(src->unified_rw_rep);
 895 }
 896
 897 static void json_object_add_client_info(struct json_object *obj,
 898                                         struct fio_client *client)
 899 {
 900         const char *hostname = client->hostname ? client->hostname : "";
 901
 902         json_object_add_value_string(obj, "hostname", hostname);
 903         json_object_add_value_int(obj, "port", client->port);
 904 }
 905
 906 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 907 {
 908         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 909         struct json_object *tsobj;
 910
 911         tsobj = show_thread_status(&p->ts, &p->rs);
 912         client->did_stat = 1;
 913         if (tsobj) {
 914                 json_object_add_client_info(tsobj, client);
 915                 json_array_add_value_object(clients_array, tsobj);
 916         }
 917
 918         if (sum_stat_clients <= 1)
 919                 return;
 920
 921         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 922         sum_group_stats(&client_gs, &p->rs);
 923
 924         client_ts.members++;
 925         client_ts.thread_number = p->ts.thread_number;
 926         client_ts.groupid = p->ts.groupid;
 927         client_ts.unified_rw_rep = p->ts.unified_rw_rep;
 928
 929         if (++sum_stat_nr == sum_stat_clients) {
 930                 strcpy(client_ts.name, "All clients");
 931                 tsobj = show_thread_status(&client_ts, &client_gs);
 932                 if (tsobj) {
 933                         json_object_add_client_info(tsobj, client);
 934                         json_array_add_value_object(clients_array, tsobj);
 935                 }
 936         }
 937 }
 938
 939 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 940 {
 941         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 942
 943         show_group_stats(gs);
 944 }
 945
 946 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 947 {
 948         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 949         const char *buf = (const char *) pdu->buf;
 950         const char *name;
 951         int fio_unused ret;
 952
 953         name = client->name ? client->name : client->hostname;
 954
 955         if (!client->skip_newline)
 956                 fprintf(f_out, "<%s> ", name);
 957         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 958         fflush(f_out);
 959         client->skip_newline = strchr(buf, '\n') == NULL;
 960 }
 961
 962 static void convert_agg(struct disk_util_agg *agg)
 963 {
 964         int i;
 965
 966         for (i = 0; i < 2; i++) {
 967                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 968                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 969                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 970                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 971         }
 972
 973         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 974         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 975         agg->slavecount         = le32_to_cpu(agg->slavecount);
 976         agg->max_util.u.f       = fio_uint64_to_double(le64_to_cpu(agg->max_util.u.i));
 977 }
 978
 979 static void convert_dus(struct disk_util_stat *dus)
 980 {
 981         int i;
 982
 983         for (i = 0; i < 2; i++) {
 984                 dus->s.ios[i]           = le32_to_cpu(dus->s.ios[i]);
 985                 dus->s.merges[i]        = le32_to_cpu(dus->s.merges[i]);
 986                 dus->s.sectors[i]       = le64_to_cpu(dus->s.sectors[i]);
 987                 dus->s.ticks[i]         = le32_to_cpu(dus->s.ticks[i]);
 988         }
 989
 990         dus->s.io_ticks         = le32_to_cpu(dus->s.io_ticks);
 991         dus->s.time_in_queue    = le32_to_cpu(dus->s.time_in_queue);
 992         dus->s.msec             = le64_to_cpu(dus->s.msec);
 993 }
 994
 995 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 996 {
 997         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 998
 999         if (!client->disk_stats_shown) {
1000                 client->disk_stats_shown = 1;
1001                 log_info("\nDisk stats (read/write):\n");
1002         }
1003
1004         if (output_format == FIO_OUTPUT_JSON) {
1005                 struct json_object *duobj;
1006                 json_array_add_disk_util(&du->dus, &du->agg, du_array);
1007                 duobj = json_array_last_value_object(du_array);
1008                 json_object_add_client_info(duobj, client);
1009         } else
1010                 print_disk_util(&du->dus, &du->agg, output_format == FIO_OUTPUT_TERSE);
1011 }
1012
1013 static void convert_jobs_eta(struct jobs_eta *je)
1014 {
1015         int i;
1016
1017         je->nr_running          = le32_to_cpu(je->nr_running);
1018         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
1019         je->nr_pending          = le32_to_cpu(je->nr_pending);
1020         je->nr_setting_up       = le32_to_cpu(je->nr_setting_up);
1021         je->files_open          = le32_to_cpu(je->files_open);
1022
1023         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1024                 je->m_rate[i]   = le32_to_cpu(je->m_rate[i]);
1025                 je->t_rate[i]   = le32_to_cpu(je->t_rate[i]);
1026                 je->m_iops[i]   = le32_to_cpu(je->m_iops[i]);
1027                 je->t_iops[i]   = le32_to_cpu(je->t_iops[i]);
1028                 je->rate[i]     = le32_to_cpu(je->rate[i]);
1029                 je->iops[i]     = le32_to_cpu(je->iops[i]);
1030         }
1031
1032         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
1033         je->eta_sec             = le64_to_cpu(je->eta_sec);
1034         je->nr_threads          = le32_to_cpu(je->nr_threads);
1035         je->is_pow2             = le32_to_cpu(je->is_pow2);
1036         je->unit_base           = le32_to_cpu(je->unit_base);
1037 }
1038
1039 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
1040 {
1041         int i;
1042
1043         dst->nr_running         += je->nr_running;
1044         dst->nr_ramp            += je->nr_ramp;
1045         dst->nr_pending         += je->nr_pending;
1046         dst->nr_setting_up      += je->nr_setting_up;
1047         dst->files_open         += je->files_open;
1048
1049         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1050                 dst->m_rate[i]  += je->m_rate[i];
1051                 dst->t_rate[i]  += je->t_rate[i];
1052                 dst->m_iops[i]  += je->m_iops[i];
1053                 dst->t_iops[i]  += je->t_iops[i];
1054                 dst->rate[i]    += je->rate[i];
1055                 dst->iops[i]    += je->iops[i];
1056         }
1057
1058         dst->elapsed_sec        += je->elapsed_sec;
1059
1060         if (je->eta_sec > dst->eta_sec)
1061                 dst->eta_sec = je->eta_sec;
1062
1063         dst->nr_threads         += je->nr_threads;
1064
1065         /*
1066          * This wont be correct for multiple strings, but at least it
1067          * works for the basic cases.
1068          */
1069         strcpy((char *) dst->run_str, (char *) je->run_str);
1070 }
1071
1072 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
1073 {
1074         if (!--eta->pending) {
1075                 eta_fn(&eta->eta);
1076                 free(eta);
1077         }
1078 }
1079
1080 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
1081 {
1082         struct fio_net_cmd_reply *reply = NULL;
1083         struct flist_head *entry;
1084
1085         flist_for_each(entry, &client->cmd_list) {
1086                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1087
1088                 if (cmd->tag == (uintptr_t) reply)
1089                         break;
1090
1091                 reply = NULL;
1092         }
1093
1094         if (!reply) {
1095                 log_err("fio: client: unable to find matching tag (%llx)\n", (unsigned long long) cmd->tag);
1096                 return;
1097         }
1098
1099         flist_del(&reply->list);
1100         cmd->tag = reply->saved_tag;
1101         free(reply);
1102 }
1103
1104 int fio_client_wait_for_reply(struct fio_client *client, uint64_t tag)
1105 {
1106         do {
1107                 struct fio_net_cmd_reply *reply = NULL;
1108                 struct flist_head *entry;
1109
1110                 flist_for_each(entry, &client->cmd_list) {
1111                         reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1112
1113                         if (tag == (uintptr_t) reply)
1114                                 break;
1115
1116                         reply = NULL;
1117                 }
1118
1119                 if (!reply)
1120                         break;
1121
1122                 usleep(1000);
1123         } while (1);
1124
1125         return 0;
1126 }
1127
1128 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
1129 {
1130         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1131         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
1132
1133         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
1134
1135         assert(client->eta_in_flight == eta);
1136
1137         client->eta_in_flight = NULL;
1138         flist_del_init(&client->eta_list);
1139
1140         if (client->ops->jobs_eta)
1141                 client->ops->jobs_eta(client, je);
1142
1143         fio_client_sum_jobs_eta(&eta->eta, je);
1144         fio_client_dec_jobs_eta(eta, client->ops->eta);
1145 }
1146
1147 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
1148 {
1149         struct cmd_probe_reply_pdu *probe = (struct cmd_probe_reply_pdu *) cmd->payload;
1150         const char *os, *arch;
1151         char bit[16];
1152
1153         os = fio_get_os_string(probe->os);
1154         if (!os)
1155                 os = "unknown";
1156
1157         arch = fio_get_arch_string(probe->arch);
1158         if (!arch)
1159                 os = "unknown";
1160
1161         sprintf(bit, "%d-bit", probe->bpp * 8);
1162         probe->flags = le64_to_cpu(probe->flags);
1163
1164         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%s, flags=%lx\n",
1165                 probe->hostname, probe->bigendian, bit, os, arch,
1166                 probe->fio_version, (unsigned long) probe->flags);
1167
1168         if (!client->name)
1169                 client->name = strdup((char *) probe->hostname);
1170 }
1171
1172 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
1173 {
1174         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1175
1176         client->state = Client_started;
1177         client->jobs = le32_to_cpu(pdu->jobs);
1178         client->nr_stat = le32_to_cpu(pdu->stat_outputs);
1179
1180         sum_stat_clients += client->nr_stat;
1181 }
1182
1183 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
1184 {
1185         if (client->error)
1186                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
1187 }
1188
1189 static void convert_stop(struct fio_net_cmd *cmd)
1190 {
1191         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1192
1193         pdu->error = le32_to_cpu(pdu->error);
1194 }
1195
1196 static void convert_text(struct fio_net_cmd *cmd)
1197 {
1198         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
1199
1200         pdu->level      = le32_to_cpu(pdu->level);
1201         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
1202         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
1203         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
1204 }
1205
1206 static struct cmd_iolog_pdu *convert_iolog_gz(struct fio_net_cmd *cmd,
1207                                               struct cmd_iolog_pdu *pdu)
1208 {
1209 #ifdef CONFIG_ZLIB
1210         struct cmd_iolog_pdu *ret;
1211         z_stream stream;
1212         uint32_t nr_samples;
1213         size_t total;
1214         void *p;
1215
1216         stream.zalloc = Z_NULL;
1217         stream.zfree = Z_NULL;
1218         stream.opaque = Z_NULL;
1219         stream.avail_in = 0;
1220         stream.next_in = Z_NULL;
1221
1222         if (inflateInit(&stream) != Z_OK)
1223                 return NULL;
1224
1225         /*
1226          * Get header first, it's not compressed
1227          */
1228         nr_samples = le64_to_cpu(pdu->nr_samples);
1229
1230         total = nr_samples * __log_entry_sz(le32_to_cpu(pdu->log_offset));
1231         ret = malloc(total + sizeof(*pdu));
1232         ret->nr_samples = nr_samples;
1233
1234         memcpy(ret, pdu, sizeof(*pdu));
1235
1236         p = (void *) ret + sizeof(*pdu);
1237
1238         stream.avail_in = cmd->pdu_len - sizeof(*pdu);
1239         stream.next_in = (void *) pdu + sizeof(*pdu);
1240         while (stream.avail_in) {
1241                 unsigned int this_chunk = 65536;
1242                 unsigned int this_len;
1243                 int err;
1244
1245                 if (this_chunk > total)
1246                         this_chunk = total;
1247
1248                 stream.avail_out = this_chunk;
1249                 stream.next_out = p;
1250                 err = inflate(&stream, Z_NO_FLUSH);
1251                 /* may be Z_OK, or Z_STREAM_END */
1252                 if (err < 0) {
1253                         log_err("fio: inflate error %d\n", err);
1254                         free(ret);
1255                         ret = NULL;
1256                         goto err;
1257                 }
1258
1259                 this_len = this_chunk - stream.avail_out;
1260                 p += this_len;
1261                 total -= this_len;
1262         }
1263
1264 err:
1265         inflateEnd(&stream);
1266         return ret;
1267 #else
1268         return NULL;
1269 #endif
1270 }
1271
1272 /*
1273  * This has been compressed on the server side, since it can be big.
1274  * Uncompress here.
1275  */
1276 static struct cmd_iolog_pdu *convert_iolog(struct fio_net_cmd *cmd)
1277 {
1278         struct cmd_iolog_pdu *pdu = (struct cmd_iolog_pdu *) cmd->payload;
1279         struct cmd_iolog_pdu *ret;
1280         uint64_t i;
1281         void *samples;
1282
1283         /*
1284          * Convert if compressed and we support it. If it's not
1285          * compressed, we need not do anything.
1286          */
1287         if (le32_to_cpu(pdu->compressed)) {
1288 #ifndef CONFIG_ZLIB
1289                 log_err("fio: server sent compressed data by mistake\n");
1290                 return NULL;
1291 #endif
1292                 ret = convert_iolog_gz(cmd, pdu);
1293                 if (!ret) {
1294                         log_err("fio: failed decompressing log\n");
1295                         return NULL;
1296                 }
1297         } else
1298                 ret = pdu;
1299
1300         ret->nr_samples         = le64_to_cpu(ret->nr_samples);
1301         ret->thread_number      = le32_to_cpu(ret->thread_number);
1302         ret->log_type           = le32_to_cpu(ret->log_type);
1303         ret->compressed         = le32_to_cpu(ret->compressed);
1304         ret->log_offset         = le32_to_cpu(ret->log_offset);
1305
1306         samples = &ret->samples[0];
1307         for (i = 0; i < ret->nr_samples; i++) {
1308                 struct io_sample *s;
1309
1310                 s = __get_sample(samples, ret->log_offset, i);
1311                 s->time         = le64_to_cpu(s->time);
1312                 s->val          = le64_to_cpu(s->val);
1313                 s->__ddir       = le32_to_cpu(s->__ddir);
1314                 s->bs           = le32_to_cpu(s->bs);
1315
1316                 if (ret->log_offset) {
1317                         struct io_sample_offset *so = (void *) s;
1318
1319                         so->offset = le64_to_cpu(so->offset);
1320                 }
1321         }
1322
1323         return ret;
1324 }
1325
1326 static void sendfile_reply(int fd, struct cmd_sendfile_reply *rep,
1327                            size_t size, uint64_t tag)
1328 {
1329         rep->error = cpu_to_le32(rep->error);
1330         fio_net_send_cmd(fd, FIO_NET_CMD_SENDFILE, rep, size, &tag, NULL);
1331 }
1332
1333 static int read_data(int fd, void *data, size_t size)
1334 {
1335         ssize_t ret;
1336
1337         while (size) {
1338                 ret = read(fd, data, size);
1339                 if (ret < 0)
1340                         return errno;
1341                 else if (!ret)
1342                         break;
1343                 else {
1344                         data += ret;
1345                         size -= ret;
1346                 }
1347         }
1348
1349         if (size)
1350                 return EAGAIN;
1351
1352         return 0;
1353 }
1354
1355 static int send_file(struct fio_client *client, struct cmd_sendfile *pdu,
1356                      uint64_t tag)
1357 {
1358         struct cmd_sendfile_reply *rep;
1359         struct stat sb;
1360         size_t size;
1361         int fd;
1362
1363         size = sizeof(*rep);
1364         rep = malloc(size);
1365
1366         if (stat((char *)pdu->path, &sb) < 0) {
1367 fail:
1368                 rep->error = errno;
1369                 sendfile_reply(client->fd, rep, size, tag);
1370                 free(rep);
1371                 return 1;
1372         }
1373
1374         size += sb.st_size;
1375         rep = realloc(rep, size);
1376         rep->size = cpu_to_le32((uint32_t) sb.st_size);
1377
1378         fd = open((char *)pdu->path, O_RDONLY);
1379         if (fd == -1 )
1380                 goto fail;
1381
1382         rep->error = read_data(fd, &rep->data, sb.st_size);
1383         sendfile_reply(client->fd, rep, size, tag);
1384         free(rep);
1385         close(fd);
1386         return 0;
1387 }
1388
1389 int fio_handle_client(struct fio_client *client)
1390 {
1391         struct client_ops *ops = client->ops;
1392         struct fio_net_cmd *cmd;
1393
1394         dprint(FD_NET, "client: handle %s\n", client->hostname);
1395
1396         cmd = fio_net_recv_cmd(client->fd);
1397         if (!cmd)
1398                 return 0;
1399
1400         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
1401                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
1402
1403         switch (cmd->opcode) {
1404         case FIO_NET_CMD_QUIT:
1405                 if (ops->quit)
1406                         ops->quit(client, cmd);
1407                 remove_client(client);
1408                 break;
1409         case FIO_NET_CMD_TEXT:
1410                 convert_text(cmd);
1411                 ops->text(client, cmd);
1412                 break;
1413         case FIO_NET_CMD_DU: {
1414                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
1415
1416                 convert_dus(&du->dus);
1417                 convert_agg(&du->agg);
1418
1419                 ops->disk_util(client, cmd);
1420                 break;
1421                 }
1422         case FIO_NET_CMD_TS: {
1423                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
1424
1425                 convert_ts(&p->ts, &p->ts);
1426                 convert_gs(&p->rs, &p->rs);
1427
1428                 ops->thread_status(client, cmd);
1429                 break;
1430                 }
1431         case FIO_NET_CMD_GS: {
1432                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
1433
1434                 convert_gs(gs, gs);
1435
1436                 ops->group_stats(client, cmd);
1437                 break;
1438                 }
1439         case FIO_NET_CMD_ETA: {
1440                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
1441
1442                 remove_reply_cmd(client, cmd);
1443                 convert_jobs_eta(je);
1444                 handle_eta(client, cmd);
1445                 break;
1446                 }
1447         case FIO_NET_CMD_PROBE:
1448                 remove_reply_cmd(client, cmd);
1449                 ops->probe(client, cmd);
1450                 break;
1451         case FIO_NET_CMD_SERVER_START:
1452                 client->state = Client_running;
1453                 if (ops->job_start)
1454                         ops->job_start(client, cmd);
1455                 break;
1456         case FIO_NET_CMD_START: {
1457                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1458
1459                 pdu->jobs = le32_to_cpu(pdu->jobs);
1460                 ops->start(client, cmd);
1461                 break;
1462                 }
1463         case FIO_NET_CMD_STOP: {
1464                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1465
1466                 convert_stop(cmd);
1467                 client->state = Client_stopped;
1468                 client->error = le32_to_cpu(pdu->error);
1469                 client->signal = le32_to_cpu(pdu->signal);
1470                 ops->stop(client, cmd);
1471                 break;
1472                 }
1473         case FIO_NET_CMD_ADD_JOB: {
1474                 struct cmd_add_job_pdu *pdu = (struct cmd_add_job_pdu *) cmd->payload;
1475
1476                 client->thread_number = le32_to_cpu(pdu->thread_number);
1477                 client->groupid = le32_to_cpu(pdu->groupid);
1478
1479                 if (ops->add_job)
1480                         ops->add_job(client, cmd);
1481                 break;
1482                 }
1483         case FIO_NET_CMD_IOLOG:
1484                 if (ops->iolog) {
1485                         struct cmd_iolog_pdu *pdu;
1486
1487                         pdu = convert_iolog(cmd);
1488                         ops->iolog(client, pdu);
1489                 }
1490                 break;
1491         case FIO_NET_CMD_UPDATE_JOB:
1492                 ops->update_job(client, cmd);
1493                 remove_reply_cmd(client, cmd);
1494                 break;
1495         case FIO_NET_CMD_VTRIGGER: {
1496                 struct all_io_list *pdu = (struct all_io_list *) cmd->payload;
1497                 char buf[64];
1498
1499                 __verify_save_state(pdu, server_name(client, buf, sizeof(buf)));
1500                 break;
1501                 }
1502         case FIO_NET_CMD_SENDFILE: {
1503                 struct cmd_sendfile *pdu = (struct cmd_sendfile *) cmd->payload;
1504                 send_file(client, pdu, cmd->tag);
1505                 break;
1506                 }
1507         default:
1508                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1509                 break;
1510         }
1511
1512         free(cmd);
1513         return 1;
1514 }
1515
1516 int fio_clients_send_trigger(const char *cmd)
1517 {
1518         struct flist_head *entry;
1519         struct fio_client *client;
1520         size_t slen;
1521
1522         dprint(FD_NET, "client: send vtrigger: %s\n", cmd);
1523
1524         if (!cmd)
1525                 slen = 0;
1526         else
1527                 slen = strlen(cmd);
1528
1529         flist_for_each(entry, &client_list) {
1530                 struct cmd_vtrigger_pdu *pdu;
1531
1532                 client = flist_entry(entry, struct fio_client, list);
1533
1534                 pdu = malloc(sizeof(*pdu) + slen);
1535                 pdu->len = cpu_to_le16((uint16_t) slen);
1536                 if (slen)
1537                         memcpy(pdu->cmd, cmd, slen);
1538                 fio_net_send_cmd(client->fd, FIO_NET_CMD_VTRIGGER, pdu,
1539                                         sizeof(*pdu) + slen, NULL, NULL);
1540                 free(pdu);
1541         }
1542
1543         return 0;
1544 }
1545
1546 static void request_client_etas(struct client_ops *ops)
1547 {
1548         struct fio_client *client;
1549         struct flist_head *entry;
1550         struct client_eta *eta;
1551         int skipped = 0;
1552
1553         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1554
1555         eta = calloc(1, sizeof(*eta) + __THREAD_RUNSTR_SZ(REAL_MAX_JOBS));
1556         eta->pending = nr_clients;
1557
1558         flist_for_each(entry, &client_list) {
1559                 client = flist_entry(entry, struct fio_client, list);
1560
1561                 if (!flist_empty(&client->eta_list)) {
1562                         skipped++;
1563                         continue;
1564                 }
1565                 if (client->state != Client_running)
1566                         continue;
1567
1568                 assert(!client->eta_in_flight);
1569                 flist_add_tail(&client->eta_list, &eta_list);
1570                 client->eta_in_flight = eta;
1571                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1572                                         (uintptr_t) eta, &client->cmd_list);
1573         }
1574
1575         while (skipped--)
1576                 fio_client_dec_jobs_eta(eta, ops->eta);
1577
1578         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1579 }
1580
1581 static int client_check_cmd_timeout(struct fio_client *client,
1582                                     struct timeval *now)
1583 {
1584         struct fio_net_cmd_reply *reply;
1585         struct flist_head *entry, *tmp;
1586         int ret = 0;
1587
1588         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1589                 reply = flist_entry(entry, struct fio_net_cmd_reply, list);
1590
1591                 if (mtime_since(&reply->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1592                         continue;
1593
1594                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1595                                                 fio_server_op(reply->opcode));
1596                 flist_del(&reply->list);
1597                 free(reply);
1598                 ret = 1;
1599         }
1600
1601         return flist_empty(&client->cmd_list) && ret;
1602 }
1603
1604 static int fio_check_clients_timed_out(void)
1605 {
1606         struct fio_client *client;
1607         struct flist_head *entry, *tmp;
1608         struct timeval tv;
1609         int ret = 0;
1610
1611         fio_gettime(&tv, NULL);
1612
1613         flist_for_each_safe(entry, tmp, &client_list) {
1614                 client = flist_entry(entry, struct fio_client, list);
1615
1616                 if (flist_empty(&client->cmd_list))
1617                         continue;
1618
1619                 if (!client_check_cmd_timeout(client, &tv))
1620                         continue;
1621
1622                 if (client->ops->timed_out)
1623                         client->ops->timed_out(client);
1624                 else
1625                         log_err("fio: client %s timed out\n", client->hostname);
1626
1627                 remove_client(client);
1628                 ret = 1;
1629         }
1630
1631         return ret;
1632 }
1633
1634 int fio_handle_clients(struct client_ops *ops)
1635 {
1636         struct pollfd *pfds;
1637         int i, ret = 0, retval = 0;
1638
1639         fio_gettime(&eta_tv, NULL);
1640
1641         pfds = malloc(nr_clients * sizeof(struct pollfd));
1642
1643         init_thread_stat(&client_ts);
1644         init_group_run_stat(&client_gs);
1645
1646         while (!exit_backend && nr_clients) {
1647                 struct flist_head *entry, *tmp;
1648                 struct fio_client *client;
1649
1650                 i = 0;
1651                 flist_for_each_safe(entry, tmp, &client_list) {
1652                         client = flist_entry(entry, struct fio_client, list);
1653
1654                         if (!client->sent_job && !client->ops->stay_connected &&
1655                             flist_empty(&client->cmd_list)) {
1656                                 remove_client(client);
1657                                 continue;
1658                         }
1659
1660                         pfds[i].fd = client->fd;
1661                         pfds[i].events = POLLIN;
1662                         i++;
1663                 }
1664
1665                 if (!nr_clients)
1666                         break;
1667
1668                 assert(i == nr_clients);
1669
1670                 do {
1671                         struct timeval tv;
1672                         int timeout;
1673
1674                         fio_gettime(&tv, NULL);
1675                         if (mtime_since(&eta_tv, &tv) >= 900) {
1676                                 request_client_etas(ops);
1677                                 memcpy(&eta_tv, &tv, sizeof(tv));
1678
1679                                 if (fio_check_clients_timed_out())
1680                                         break;
1681                         }
1682
1683                         check_trigger_file();
1684
1685                         timeout = min(100u, ops->eta_msec);
1686
1687                         ret = poll(pfds, nr_clients, timeout);
1688                         if (ret < 0) {
1689                                 if (errno == EINTR)
1690                                         continue;
1691                                 log_err("fio: poll clients: %s\n", strerror(errno));
1692                                 break;
1693                         } else if (!ret)
1694                                 continue;
1695                 } while (ret <= 0);
1696
1697                 for (i = 0; i < nr_clients; i++) {
1698                         if (!(pfds[i].revents & POLLIN))
1699                                 continue;
1700
1701                         client = find_client_by_fd(pfds[i].fd);
1702                         if (!client) {
1703                                 log_err("fio: unknown client fd %ld\n", (long) pfds[i].fd);
1704                                 continue;
1705                         }
1706                         if (!fio_handle_client(client)) {
1707                                 log_info("client: host=%s disconnected\n",
1708                                                 client->hostname);
1709                                 remove_client(client);
1710                                 retval = 1;
1711                         } else if (client->error)
1712                                 retval = 1;
1713                         fio_put_client(client);
1714                 }
1715         }
1716
1717         fio_client_json_fini();
1718
1719         free(pfds);
1720         return retval;
1721 }