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
  18 #include "fio.h"
  19 #include "client.h"
  20 #include "server.h"
  21 #include "flist.h"
  22 #include "hash.h"
  23
  24 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  25 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  26 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  31
  32 struct client_ops fio_client_ops = {
  33         .text_op        = handle_text,
  34         .disk_util      = handle_du,
  35         .thread_status  = handle_ts,
  36         .group_stats    = handle_gs,
  37         .stop           = handle_stop,
  38         .start          = handle_start,
  39         .eta            = display_thread_status,
  40         .probe          = handle_probe,
  41         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  42 };
  43
  44 static struct timeval eta_tv;
  45
  46 static FLIST_HEAD(client_list);
  47 static FLIST_HEAD(eta_list);
  48
  49 static FLIST_HEAD(arg_list);
  50
  51 struct thread_stat client_ts;
  52 struct group_run_stats client_gs;
  53 int sum_stat_clients;
  54
  55 static int sum_stat_nr;
  56
  57 #define FIO_CLIENT_HASH_BITS    7
  58 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  59 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  60 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  61
  62 static void fio_client_add_hash(struct fio_client *client)
  63 {
  64         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  65
  66         bucket &= FIO_CLIENT_HASH_MASK;
  67         flist_add(&client->hash_list, &client_hash[bucket]);
  68 }
  69
  70 static void fio_client_remove_hash(struct fio_client *client)
  71 {
  72         if (!flist_empty(&client->hash_list))
  73                 flist_del_init(&client->hash_list);
  74 }
  75
  76 static void fio_init fio_client_hash_init(void)
  77 {
  78         int i;
  79
  80         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  81                 INIT_FLIST_HEAD(&client_hash[i]);
  82 }
  83
  84 static struct fio_client *find_client_by_fd(int fd)
  85 {
  86         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  87         struct fio_client *client;
  88         struct flist_head *entry;
  89
  90         flist_for_each(entry, &client_hash[bucket]) {
  91                 client = flist_entry(entry, struct fio_client, hash_list);
  92
  93                 if (client->fd == fd)
  94                         return fio_get_client(client);
  95         }
  96
  97         return NULL;
  98 }
  99
 100 void fio_put_client(struct fio_client *client)
 101 {
 102         if (--client->refs)
 103                 return;
 104
 105         free(client->hostname);
 106         if (client->argv)
 107                 free(client->argv);
 108         if (client->name)
 109                 free(client->name);
 110
 111         free(client);
 112 }
 113
 114 static void remove_client(struct fio_client *client)
 115 {
 116         assert(client->refs);
 117
 118         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 119
 120         if (!flist_empty(&client->list))
 121                 flist_del_init(&client->list);
 122
 123         fio_client_remove_hash(client);
 124
 125         if (!flist_empty(&client->eta_list)) {
 126                 flist_del_init(&client->eta_list);
 127                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 128         }
 129
 130         nr_clients--;
 131         sum_stat_clients--;
 132
 133         fio_put_client(client);
 134 }
 135
 136 struct fio_client *fio_get_client(struct fio_client *client)
 137 {
 138         client->refs++;
 139         return client;
 140 }
 141
 142 static void __fio_client_add_cmd_option(struct fio_client *client,
 143                                         const char *opt)
 144 {
 145         int index;
 146
 147         index = client->argc++;
 148         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 149         client->argv[index] = strdup(opt);
 150         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 151 }
 152
 153 void fio_client_add_cmd_option(void *cookie, const char *opt)
 154 {
 155         struct fio_client *client = cookie;
 156         struct flist_head *entry;
 157
 158         if (!client || !opt)
 159                 return;
 160
 161         __fio_client_add_cmd_option(client, opt);
 162
 163         /*
 164          * Duplicate arguments to shared client group
 165          */
 166         flist_for_each(entry, &arg_list) {
 167                 client = flist_entry(entry, struct fio_client, arg_list);
 168
 169                 __fio_client_add_cmd_option(client, opt);
 170         }
 171 }
 172
 173 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 174                                            const char *hostname, int type,
 175                                            int port)
 176 {
 177         struct fio_client *client;
 178
 179         client = malloc(sizeof(*client));
 180         memset(client, 0, sizeof(*client));
 181
 182         INIT_FLIST_HEAD(&client->list);
 183         INIT_FLIST_HEAD(&client->hash_list);
 184         INIT_FLIST_HEAD(&client->arg_list);
 185         INIT_FLIST_HEAD(&client->eta_list);
 186         INIT_FLIST_HEAD(&client->cmd_list);
 187
 188         client->hostname = strdup(hostname);
 189
 190         if (type == Fio_client_socket)
 191                 client->is_sock = 1;
 192         else {
 193                 int ipv6;
 194
 195                 ipv6 = type == Fio_client_ipv6;
 196                 if (fio_server_parse_host(hostname, &ipv6,
 197                                                 &client->addr.sin_addr,
 198                                                 &client->addr6.sin6_addr))
 199                         goto err;
 200
 201                 client->port = port;
 202         }
 203
 204         client->fd = -1;
 205         client->ops = ops;
 206         client->refs = 1;
 207
 208         __fio_client_add_cmd_option(client, "fio");
 209
 210         flist_add(&client->list, &client_list);
 211         nr_clients++;
 212         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 213         return client;
 214 err:
 215         free(client);
 216         return NULL;
 217 }
 218
 219 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 220 {
 221         struct fio_client *existing = *cookie;
 222         struct fio_client *client;
 223
 224         if (existing) {
 225                 /*
 226                  * We always add our "exec" name as the option, hence 1
 227                  * means empty.
 228                  */
 229                 if (existing->argc == 1)
 230                         flist_add_tail(&existing->arg_list, &arg_list);
 231                 else {
 232                         while (!flist_empty(&arg_list))
 233                                 flist_del_init(arg_list.next);
 234                 }
 235         }
 236
 237         client = malloc(sizeof(*client));
 238         memset(client, 0, sizeof(*client));
 239
 240         INIT_FLIST_HEAD(&client->list);
 241         INIT_FLIST_HEAD(&client->hash_list);
 242         INIT_FLIST_HEAD(&client->arg_list);
 243         INIT_FLIST_HEAD(&client->eta_list);
 244         INIT_FLIST_HEAD(&client->cmd_list);
 245
 246         if (fio_server_parse_string(hostname, &client->hostname,
 247                                         &client->is_sock, &client->port,
 248                                         &client->addr.sin_addr,
 249                                         &client->addr6.sin6_addr,
 250                                         &client->ipv6))
 251                 return -1;
 252
 253         client->fd = -1;
 254         client->ops = ops;
 255         client->refs = 1;
 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         *cookie = client;
 263         return 0;
 264 }
 265
 266 static void probe_client(struct fio_client *client)
 267 {
 268         dprint(FD_NET, "client: send probe\n");
 269
 270         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 271 }
 272
 273 static int fio_client_connect_ip(struct fio_client *client)
 274 {
 275         struct sockaddr *addr;
 276         fio_socklen_t socklen;
 277         int fd, domain;
 278
 279         if (client->ipv6) {
 280                 client->addr6.sin6_family = AF_INET6;
 281                 client->addr6.sin6_port = htons(client->port);
 282                 domain = AF_INET6;
 283                 addr = (struct sockaddr *) &client->addr6;
 284                 socklen = sizeof(client->addr6);
 285         } else {
 286                 client->addr.sin_family = AF_INET;
 287                 client->addr.sin_port = htons(client->port);
 288                 domain = AF_INET;
 289                 addr = (struct sockaddr *) &client->addr;
 290                 socklen = sizeof(client->addr);
 291         }
 292
 293         fd = socket(domain, SOCK_STREAM, 0);
 294         if (fd < 0) {
 295                 int ret = -errno;
 296
 297                 log_err("fio: socket: %s\n", strerror(errno));
 298                 return ret;
 299         }
 300
 301         if (connect(fd, addr, socklen) < 0) {
 302                 int ret = -errno;
 303
 304                 log_err("fio: connect: %s\n", strerror(errno));
 305                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 306                                                                 client->port);
 307                 close(fd);
 308                 return ret;
 309         }
 310
 311         return fd;
 312 }
 313
 314 static int fio_client_connect_sock(struct fio_client *client)
 315 {
 316         struct sockaddr_un *addr = &client->addr_un;
 317         fio_socklen_t len;
 318         int fd;
 319
 320         memset(addr, 0, sizeof(*addr));
 321         addr->sun_family = AF_UNIX;
 322         strcpy(addr->sun_path, client->hostname);
 323
 324         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 325         if (fd < 0) {
 326                 int ret = -errno;
 327
 328                 log_err("fio: socket: %s\n", strerror(errno));
 329                 return ret;
 330         }
 331
 332         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 333         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 334                 int ret = -errno;
 335
 336                 log_err("fio: connect; %s\n", strerror(errno));
 337                 close(fd);
 338                 return ret;
 339         }
 340
 341         return fd;
 342 }
 343
 344 int fio_client_connect(struct fio_client *client)
 345 {
 346         int fd;
 347
 348         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 349
 350         if (client->is_sock)
 351                 fd = fio_client_connect_sock(client);
 352         else
 353                 fd = fio_client_connect_ip(client);
 354
 355         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 356
 357         if (fd < 0)
 358                 return fd;
 359
 360         client->fd = fd;
 361         fio_client_add_hash(client);
 362         client->state = Client_connected;
 363
 364         probe_client(client);
 365         return 0;
 366 }
 367
 368 void fio_client_terminate(struct fio_client *client)
 369 {
 370         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 371 }
 372
 373 void fio_clients_terminate(void)
 374 {
 375         struct flist_head *entry;
 376         struct fio_client *client;
 377
 378         dprint(FD_NET, "client: terminate clients\n");
 379
 380         flist_for_each(entry, &client_list) {
 381                 client = flist_entry(entry, struct fio_client, list);
 382                 fio_client_terminate(client);
 383         }
 384 }
 385
 386 static void sig_int(int sig)
 387 {
 388         dprint(FD_NET, "client: got signal %d\n", sig);
 389         fio_clients_terminate();
 390 }
 391
 392 static void client_signal_handler(void)
 393 {
 394         struct sigaction act;
 395
 396         memset(&act, 0, sizeof(act));
 397         act.sa_handler = sig_int;
 398         act.sa_flags = SA_RESTART;
 399         sigaction(SIGINT, &act, NULL);
 400
 401         memset(&act, 0, sizeof(act));
 402         act.sa_handler = sig_int;
 403         act.sa_flags = SA_RESTART;
 404         sigaction(SIGTERM, &act, NULL);
 405 }
 406
 407 static int send_client_cmd_line(struct fio_client *client)
 408 {
 409         struct cmd_single_line_pdu *cslp;
 410         struct cmd_line_pdu *clp;
 411         unsigned long offset;
 412         unsigned int *lens;
 413         void *pdu;
 414         size_t mem;
 415         int i, ret;
 416
 417         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 418
 419         lens = malloc(client->argc * sizeof(unsigned int));
 420
 421         /*
 422          * Find out how much mem we need
 423          */
 424         for (i = 0, mem = 0; i < client->argc; i++) {
 425                 lens[i] = strlen(client->argv[i]) + 1;
 426                 mem += lens[i];
 427         }
 428
 429         /*
 430          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 431          */
 432         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 433
 434         pdu = malloc(mem);
 435         clp = pdu;
 436         offset = sizeof(*clp);
 437
 438         for (i = 0; i < client->argc; i++) {
 439                 uint16_t arg_len = lens[i];
 440
 441                 cslp = pdu + offset;
 442                 strcpy((char *) cslp->text, client->argv[i]);
 443                 cslp->len = cpu_to_le16(arg_len);
 444                 offset += sizeof(*cslp) + arg_len;
 445         }
 446
 447         free(lens);
 448         clp->lines = cpu_to_le16(client->argc);
 449         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 450         free(pdu);
 451         return ret;
 452 }
 453
 454 int fio_clients_connect(void)
 455 {
 456         struct fio_client *client;
 457         struct flist_head *entry, *tmp;
 458         int ret;
 459
 460 #ifdef WIN32
 461         WSADATA wsd;
 462         WSAStartup(MAKEWORD(2,2), &wsd);
 463 #endif
 464
 465         dprint(FD_NET, "client: connect all\n");
 466
 467         client_signal_handler();
 468
 469         flist_for_each_safe(entry, tmp, &client_list) {
 470                 client = flist_entry(entry, struct fio_client, list);
 471
 472                 ret = fio_client_connect(client);
 473                 if (ret) {
 474                         remove_client(client);
 475                         continue;
 476                 }
 477
 478                 if (client->argc > 1)
 479                         send_client_cmd_line(client);
 480         }
 481
 482         return !nr_clients;
 483 }
 484
 485 int fio_start_client(struct fio_client *client)
 486 {
 487         dprint(FD_NET, "client: start %s\n", client->hostname);
 488         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 489 }
 490
 491 int fio_start_all_clients(void)
 492 {
 493         struct fio_client *client;
 494         struct flist_head *entry, *tmp;
 495         int ret;
 496
 497         dprint(FD_NET, "client: start all\n");
 498
 499         flist_for_each_safe(entry, tmp, &client_list) {
 500                 client = flist_entry(entry, struct fio_client, list);
 501
 502                 ret = fio_start_client(client);
 503                 if (ret) {
 504                         remove_client(client);
 505                         continue;
 506                 }
 507         }
 508
 509         return flist_empty(&client_list);
 510 }
 511
 512 /*
 513  * Send file contents to server backend. We could use sendfile(), but to remain
 514  * more portable lets just read/write the darn thing.
 515  */
 516 static int __fio_client_send_ini(struct fio_client *client, const char *filename)
 517 {
 518         struct stat sb;
 519         char *p, *buf;
 520         off_t len;
 521         int fd, ret;
 522
 523         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 524
 525         fd = open(filename, O_RDONLY);
 526         if (fd < 0) {
 527                 int ret = -errno;
 528
 529                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 530                 return ret;
 531         }
 532
 533         if (fstat(fd, &sb) < 0) {
 534                 int ret = -errno;
 535
 536                 log_err("fio: job file stat: %s\n", strerror(errno));
 537                 close(fd);
 538                 return ret;
 539         }
 540
 541         buf = malloc(sb.st_size);
 542
 543         len = sb.st_size;
 544         p = buf;
 545         do {
 546                 ret = read(fd, p, len);
 547                 if (ret > 0) {
 548                         len -= ret;
 549                         if (!len)
 550                                 break;
 551                         p += ret;
 552                         continue;
 553                 } else if (!ret)
 554                         break;
 555                 else if (errno == EAGAIN || errno == EINTR)
 556                         continue;
 557         } while (1);
 558
 559         if (len) {
 560                 log_err("fio: failed reading job file %s\n", filename);
 561                 close(fd);
 562                 free(buf);
 563                 return 1;
 564         }
 565
 566         client->sent_job = 1;
 567         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 568         free(buf);
 569         close(fd);
 570         return ret;
 571 }
 572
 573 int fio_client_send_ini(struct fio_client *client, const char *filename)
 574 {
 575         int ret;
 576
 577         ret = __fio_client_send_ini(client, filename);
 578         if (!ret)
 579                 client->sent_job = 1;
 580
 581         return ret;
 582 }
 583
 584 int fio_clients_send_ini(const char *filename)
 585 {
 586         struct fio_client *client;
 587         struct flist_head *entry, *tmp;
 588
 589         flist_for_each_safe(entry, tmp, &client_list) {
 590                 client = flist_entry(entry, struct fio_client, list);
 591
 592                 if (fio_client_send_ini(client, filename))
 593                         remove_client(client);
 594         }
 595
 596         return !nr_clients;
 597 }
 598
 599 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 600 {
 601         dst->max_val    = le64_to_cpu(src->max_val);
 602         dst->min_val    = le64_to_cpu(src->min_val);
 603         dst->samples    = le64_to_cpu(src->samples);
 604
 605         /*
 606          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 607          */
 608         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 609         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 610 }
 611
 612 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 613 {
 614         int i, j;
 615
 616         dst->error      = le32_to_cpu(src->error);
 617         dst->groupid    = le32_to_cpu(src->groupid);
 618         dst->pid        = le32_to_cpu(src->pid);
 619         dst->members    = le32_to_cpu(src->members);
 620
 621         for (i = 0; i < 2; i++) {
 622                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 623                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 624                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 625                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 626         }
 627
 628         dst->usr_time           = le64_to_cpu(src->usr_time);
 629         dst->sys_time           = le64_to_cpu(src->sys_time);
 630         dst->ctx                = le64_to_cpu(src->ctx);
 631         dst->minf               = le64_to_cpu(src->minf);
 632         dst->majf               = le64_to_cpu(src->majf);
 633         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 634
 635         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 636                 fio_fp64_t *fps = &src->percentile_list[i];
 637                 fio_fp64_t *fpd = &dst->percentile_list[i];
 638
 639                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 640         }
 641
 642         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 643                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 644                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 645                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 646         }
 647
 648         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 649                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 650                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 651         }
 652
 653         for (i = 0; i < 2; i++)
 654                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 655                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 656
 657         for (i = 0; i < 3; i++) {
 658                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 659                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 660         }
 661
 662         dst->total_submit       = le64_to_cpu(src->total_submit);
 663         dst->total_complete     = le64_to_cpu(src->total_complete);
 664
 665         for (i = 0; i < 2; i++) {
 666                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 667                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 668         }
 669
 670         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 671         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 672         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 673         dst->first_error        = le32_to_cpu(src->first_error);
 674         dst->kb_base            = le32_to_cpu(src->kb_base);
 675 }
 676
 677 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 678 {
 679         int i;
 680
 681         for (i = 0; i < 2; i++) {
 682                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 683                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 684                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 685                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 686                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 687                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 688         }
 689
 690         dst->kb_base    = le32_to_cpu(src->kb_base);
 691         dst->groupid    = le32_to_cpu(src->groupid);
 692 }
 693
 694 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 695 {
 696         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 697
 698         show_thread_status(&p->ts, &p->rs);
 699
 700         if (sum_stat_clients == 1)
 701                 return;
 702
 703         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 704         sum_group_stats(&client_gs, &p->rs);
 705
 706         client_ts.members++;
 707         client_ts.groupid = p->ts.groupid;
 708
 709         if (++sum_stat_nr == sum_stat_clients) {
 710                 strcpy(client_ts.name, "All clients");
 711                 show_thread_status(&client_ts, &client_gs);
 712         }
 713 }
 714
 715 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 716 {
 717         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 718
 719         show_group_stats(gs);
 720 }
 721
 722 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 723 {
 724         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 725         const char *buf = (const char *) pdu->buf;
 726         const char *name;
 727         int fio_unused ret;
 728
 729         name = client->name ? client->name : client->hostname;
 730
 731         if (!client->skip_newline)
 732                 fprintf(f_out, "<%s> ", name);
 733         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 734         fflush(f_out);
 735         client->skip_newline = strchr(buf, '\n') == NULL;
 736 }
 737
 738 static void convert_agg(struct disk_util_agg *agg)
 739 {
 740         int i;
 741
 742         for (i = 0; i < 2; i++) {
 743                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 744                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 745                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 746                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 747         }
 748
 749         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 750         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 751         agg->slavecount         = le32_to_cpu(agg->slavecount);
 752         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 753 }
 754
 755 static void convert_dus(struct disk_util_stat *dus)
 756 {
 757         int i;
 758
 759         for (i = 0; i < 2; i++) {
 760                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 761                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 762                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 763                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 764         }
 765
 766         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 767         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 768         dus->msec               = le64_to_cpu(dus->msec);
 769 }
 770
 771 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 772 {
 773         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 774
 775         if (!client->disk_stats_shown) {
 776                 client->disk_stats_shown = 1;
 777                 log_info("\nDisk stats (read/write):\n");
 778         }
 779
 780         print_disk_util(&du->dus, &du->agg, terse_output);
 781 }
 782
 783 static void convert_jobs_eta(struct jobs_eta *je)
 784 {
 785         int i;
 786
 787         je->nr_running          = le32_to_cpu(je->nr_running);
 788         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 789         je->nr_pending          = le32_to_cpu(je->nr_pending);
 790         je->files_open          = le32_to_cpu(je->files_open);
 791
 792         for (i = 0; i < 2; i++) {
 793                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 794                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 795                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 796                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 797                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 798                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 799         }
 800
 801         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 802         je->eta_sec             = le64_to_cpu(je->eta_sec);
 803         je->nr_threads          = le32_to_cpu(je->nr_threads);
 804 }
 805
 806 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 807 {
 808         int i;
 809
 810         dst->nr_running         += je->nr_running;
 811         dst->nr_ramp            += je->nr_ramp;
 812         dst->nr_pending         += je->nr_pending;
 813         dst->files_open         += je->files_open;
 814
 815         for (i = 0; i < 2; i++) {
 816                 dst->m_rate[i]  += je->m_rate[i];
 817                 dst->t_rate[i]  += je->t_rate[i];
 818                 dst->m_iops[i]  += je->m_iops[i];
 819                 dst->t_iops[i]  += je->t_iops[i];
 820                 dst->rate[i]    += je->rate[i];
 821                 dst->iops[i]    += je->iops[i];
 822         }
 823
 824         dst->elapsed_sec        += je->elapsed_sec;
 825
 826         if (je->eta_sec > dst->eta_sec)
 827                 dst->eta_sec = je->eta_sec;
 828
 829         dst->nr_threads         += je->nr_threads;
 830         /* we need to handle je->run_str too ... */
 831 }
 832
 833 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 834 {
 835         if (!--eta->pending) {
 836                 eta_fn(&eta->eta);
 837                 free(eta);
 838         }
 839 }
 840
 841 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 842 {
 843         struct fio_net_int_cmd *icmd = NULL;
 844         struct flist_head *entry;
 845
 846         flist_for_each(entry, &client->cmd_list) {
 847                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 848
 849                 if (cmd->tag == (uintptr_t) icmd)
 850                         break;
 851
 852                 icmd = NULL;
 853         }
 854
 855         if (!icmd) {
 856                 log_err("fio: client: unable to find matching tag\n");
 857                 return;
 858         }
 859
 860         flist_del(&icmd->list);
 861         cmd->tag = icmd->saved_tag;
 862         free(icmd);
 863 }
 864
 865 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 866 {
 867         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 868         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 869
 870         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 871
 872         assert(client->eta_in_flight == eta);
 873
 874         client->eta_in_flight = NULL;
 875         flist_del_init(&client->eta_list);
 876
 877         if (client->ops->jobs_eta)
 878                 client->ops->jobs_eta(client, je);
 879
 880         fio_client_sum_jobs_eta(&eta->eta, je);
 881         fio_client_dec_jobs_eta(eta, client->ops->eta);
 882 }
 883
 884 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 885 {
 886         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 887         const char *os, *arch;
 888         char bit[16];
 889
 890         os = fio_get_os_string(probe->os);
 891         if (!os)
 892                 os = "unknown";
 893
 894         arch = fio_get_arch_string(probe->arch);
 895         if (!arch)
 896                 os = "unknown";
 897
 898         sprintf(bit, "%d-bit", probe->bpp * 8);
 899
 900         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 901                 probe->hostname, probe->bigendian, bit, os, arch,
 902                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 903
 904         if (!client->name)
 905                 client->name = strdup((char *) probe->hostname);
 906 }
 907
 908 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 909 {
 910         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 911
 912         client->state = Client_started;
 913         client->jobs = pdu->jobs;
 914 }
 915
 916 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 917 {
 918         if (client->error)
 919                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 920 }
 921
 922 static void convert_stop(struct fio_net_cmd *cmd)
 923 {
 924         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 925
 926         pdu->error = le32_to_cpu(pdu->error);
 927 }
 928
 929 static void convert_text(struct fio_net_cmd *cmd)
 930 {
 931         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 932
 933         pdu->level      = le32_to_cpu(pdu->level);
 934         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
 935         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
 936         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
 937 }
 938
 939 int fio_handle_client(struct fio_client *client)
 940 {
 941         struct client_ops *ops = client->ops;
 942         struct fio_net_cmd *cmd;
 943
 944         dprint(FD_NET, "client: handle %s\n", client->hostname);
 945
 946         cmd = fio_net_recv_cmd(client->fd);
 947         if (!cmd)
 948                 return 0;
 949
 950         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
 951                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
 952
 953         switch (cmd->opcode) {
 954         case FIO_NET_CMD_QUIT:
 955                 if (ops->quit)
 956                         ops->quit(client);
 957                 remove_client(client);
 958                 free(cmd);
 959                 break;
 960         case FIO_NET_CMD_TEXT:
 961                 convert_text(cmd);
 962                 ops->text_op(client, cmd);
 963                 free(cmd);
 964                 break;
 965         case FIO_NET_CMD_DU: {
 966                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 967
 968                 convert_dus(&du->dus);
 969                 convert_agg(&du->agg);
 970
 971                 ops->disk_util(client, cmd);
 972                 free(cmd);
 973                 break;
 974                 }
 975         case FIO_NET_CMD_TS: {
 976                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 977
 978                 convert_ts(&p->ts, &p->ts);
 979                 convert_gs(&p->rs, &p->rs);
 980
 981                 ops->thread_status(client, cmd);
 982                 free(cmd);
 983                 break;
 984                 }
 985         case FIO_NET_CMD_GS: {
 986                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 987
 988                 convert_gs(gs, gs);
 989
 990                 ops->group_stats(client, cmd);
 991                 free(cmd);
 992                 break;
 993                 }
 994         case FIO_NET_CMD_ETA: {
 995                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 996
 997                 remove_reply_cmd(client, cmd);
 998                 convert_jobs_eta(je);
 999                 handle_eta(client, cmd);
1000                 free(cmd);
1001                 break;
1002                 }
1003         case FIO_NET_CMD_PROBE:
1004                 remove_reply_cmd(client, cmd);
1005                 ops->probe(client, cmd);
1006                 free(cmd);
1007                 break;
1008         case FIO_NET_CMD_SERVER_START:
1009                 client->state = Client_running;
1010                 if (ops->job_start)
1011                         ops->job_start(client, cmd);
1012                 free(cmd);
1013                 break;
1014         case FIO_NET_CMD_START: {
1015                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1016
1017                 pdu->jobs = le32_to_cpu(pdu->jobs);
1018                 ops->start(client, cmd);
1019                 free(cmd);
1020                 break;
1021                 }
1022         case FIO_NET_CMD_STOP: {
1023                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1024
1025                 convert_stop(cmd);
1026                 client->state = Client_stopped;
1027                 client->error = pdu->error;
1028                 ops->stop(client, cmd);
1029                 free(cmd);
1030                 break;
1031                 }
1032         case FIO_NET_CMD_ADD_JOB:
1033                 if (ops->add_job)
1034                         ops->add_job(client, cmd);
1035                 free(cmd);
1036                 break;
1037         default:
1038                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1039                 free(cmd);
1040                 break;
1041         }
1042
1043         return 1;
1044 }
1045
1046 static void request_client_etas(struct client_ops *ops)
1047 {
1048         struct fio_client *client;
1049         struct flist_head *entry;
1050         struct client_eta *eta;
1051         int skipped = 0;
1052
1053         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1054
1055         eta = malloc(sizeof(*eta));
1056         memset(&eta->eta, 0, sizeof(eta->eta));
1057         eta->pending = nr_clients;
1058
1059         flist_for_each(entry, &client_list) {
1060                 client = flist_entry(entry, struct fio_client, list);
1061
1062                 if (!flist_empty(&client->eta_list)) {
1063                         skipped++;
1064                         continue;
1065                 }
1066                 if (client->state != Client_running)
1067                         continue;
1068
1069                 assert(!client->eta_in_flight);
1070                 flist_add_tail(&client->eta_list, &eta_list);
1071                 client->eta_in_flight = eta;
1072                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1073                                         (uintptr_t) eta, &client->cmd_list);
1074         }
1075
1076         while (skipped--)
1077                 fio_client_dec_jobs_eta(eta, ops->eta);
1078
1079         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1080 }
1081
1082 static int client_check_cmd_timeout(struct fio_client *client,
1083                                     struct timeval *now)
1084 {
1085         struct fio_net_int_cmd *cmd;
1086         struct flist_head *entry, *tmp;
1087         int ret = 0;
1088
1089         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1090                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
1091
1092                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1093                         continue;
1094
1095                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1096                                                 fio_server_op(cmd->cmd.opcode));
1097                 flist_del(&cmd->list);
1098                 free(cmd);
1099                 ret = 1;
1100         }
1101
1102         return flist_empty(&client->cmd_list) && ret;
1103 }
1104
1105 static int fio_check_clients_timed_out(void)
1106 {
1107         struct fio_client *client;
1108         struct flist_head *entry, *tmp;
1109         struct timeval tv;
1110         int ret = 0;
1111
1112         gettimeofday(&tv, NULL);
1113
1114         flist_for_each_safe(entry, tmp, &client_list) {
1115                 client = flist_entry(entry, struct fio_client, list);
1116
1117                 if (flist_empty(&client->cmd_list))
1118                         continue;
1119
1120                 if (!client_check_cmd_timeout(client, &tv))
1121                         continue;
1122
1123                 if (client->ops->timed_out)
1124                         client->ops->timed_out(client);
1125                 else
1126                         log_err("fio: client %s timed out\n", client->hostname);
1127
1128                 remove_client(client);
1129                 ret = 1;
1130         }
1131
1132         return ret;
1133 }
1134
1135 int fio_handle_clients(struct client_ops *ops)
1136 {
1137         struct pollfd *pfds;
1138         int i, ret = 0, retval = 0;
1139
1140         gettimeofday(&eta_tv, NULL);
1141
1142         pfds = malloc(nr_clients * sizeof(struct pollfd));
1143
1144         sum_stat_clients = nr_clients;
1145         init_thread_stat(&client_ts);
1146         init_group_run_stat(&client_gs);
1147
1148         while (!exit_backend && nr_clients) {
1149                 struct flist_head *entry, *tmp;
1150                 struct fio_client *client;
1151
1152                 i = 0;
1153                 flist_for_each_safe(entry, tmp, &client_list) {
1154                         client = flist_entry(entry, struct fio_client, list);
1155
1156                         if (!client->sent_job && !client->ops->stay_connected &&
1157                             flist_empty(&client->cmd_list)) {
1158                                 remove_client(client);
1159                                 continue;
1160                         }
1161
1162                         pfds[i].fd = client->fd;
1163                         pfds[i].events = POLLIN;
1164                         i++;
1165                 }
1166
1167                 if (!nr_clients)
1168                         break;
1169
1170                 assert(i == nr_clients);
1171
1172                 do {
1173                         struct timeval tv;
1174
1175                         gettimeofday(&tv, NULL);
1176                         if (mtime_since(&eta_tv, &tv) >= ops->eta_msec) {
1177                                 request_client_etas(ops);
1178                                 memcpy(&eta_tv, &tv, sizeof(tv));
1179
1180                                 if (fio_check_clients_timed_out())
1181                                         break;
1182                         }
1183
1184                         ret = poll(pfds, nr_clients, 100);
1185                         if (ret < 0) {
1186                                 if (errno == EINTR)
1187                                         continue;
1188                                 log_err("fio: poll clients: %s\n", strerror(errno));
1189                                 break;
1190                         } else if (!ret)
1191                                 continue;
1192                 } while (ret <= 0);
1193
1194                 for (i = 0; i < nr_clients; i++) {
1195                         if (!(pfds[i].revents & POLLIN))
1196                                 continue;
1197
1198                         client = find_client_by_fd(pfds[i].fd);
1199                         if (!client) {
1200                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1201                                 continue;
1202                         }
1203                         if (!fio_handle_client(client)) {
1204                                 log_info("client: host=%s disconnected\n",
1205                                                 client->hostname);
1206                                 remove_client(client);
1207                                 retval = 1;
1208                         } else if (client->error)
1209                                 retval = 1;
1210                         fio_put_client(client);
1211                 }
1212         }
1213
1214         free(pfds);
1215         return retval;
1216 }