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_net_cmd *cmd);
  26 static void handle_gs(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
  30 struct client_ops fio_client_ops = {
  31         .text_op        = handle_text,
  32         .disk_util      = handle_du,
  33         .thread_status  = handle_ts,
  34         .group_stats    = handle_gs,
  35         .eta            = display_thread_status,
  36         .probe          = handle_probe,
  37 };
  38
  39 static struct timeval eta_tv;
  40
  41 enum {
  42         Client_created          = 0,
  43         Client_connected        = 1,
  44         Client_started          = 2,
  45         Client_running          = 3,
  46         Client_stopped          = 4,
  47         Client_exited           = 5,
  48 };
  49
  50 static FLIST_HEAD(client_list);
  51 static FLIST_HEAD(eta_list);
  52
  53 static FLIST_HEAD(arg_list);
  54
  55 static struct thread_stat client_ts;
  56 static struct group_run_stats client_gs;
  57 static int sum_stat_clients;
  58 static int sum_stat_nr;
  59
  60 #define FIO_CLIENT_HASH_BITS    7
  61 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  62 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  63 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  64
  65 static void fio_client_add_hash(struct fio_client *client)
  66 {
  67         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  68
  69         bucket &= FIO_CLIENT_HASH_MASK;
  70         flist_add(&client->hash_list, &client_hash[bucket]);
  71 }
  72
  73 static void fio_client_remove_hash(struct fio_client *client)
  74 {
  75         if (!flist_empty(&client->hash_list))
  76                 flist_del_init(&client->hash_list);
  77 }
  78
  79 static void fio_init fio_client_hash_init(void)
  80 {
  81         int i;
  82
  83         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  84                 INIT_FLIST_HEAD(&client_hash[i]);
  85 }
  86
  87 static struct fio_client *find_client_by_fd(int fd)
  88 {
  89         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  90         struct fio_client *client;
  91         struct flist_head *entry;
  92
  93         flist_for_each(entry, &client_hash[bucket]) {
  94                 client = flist_entry(entry, struct fio_client, hash_list);
  95
  96                 if (client->fd == fd)
  97                         return client;
  98         }
  99
 100         return NULL;
 101 }
 102
 103 static void remove_client(struct fio_client *client)
 104 {
 105         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 106         flist_del(&client->list);
 107
 108         fio_client_remove_hash(client);
 109
 110         if (!flist_empty(&client->eta_list)) {
 111                 flist_del_init(&client->eta_list);
 112                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 113         }
 114
 115         free(client->hostname);
 116         if (client->argv)
 117                 free(client->argv);
 118         if (client->name)
 119                 free(client->name);
 120
 121         free(client);
 122         nr_clients--;
 123         sum_stat_clients--;
 124 }
 125
 126 static void __fio_client_add_cmd_option(struct fio_client *client,
 127                                         const char *opt)
 128 {
 129         int index;
 130
 131         index = client->argc++;
 132         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 133         client->argv[index] = strdup(opt);
 134         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 135 }
 136
 137 void fio_client_add_cmd_option(void *cookie, const char *opt)
 138 {
 139         struct fio_client *client = cookie;
 140         struct flist_head *entry;
 141
 142         if (!client || !opt)
 143                 return;
 144
 145         __fio_client_add_cmd_option(client, opt);
 146
 147         /*
 148          * Duplicate arguments to shared client group
 149          */
 150         flist_for_each(entry, &arg_list) {
 151                 client = flist_entry(entry, struct fio_client, arg_list);
 152
 153                 __fio_client_add_cmd_option(client, opt);
 154         }
 155 }
 156
 157 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 158                                            const char *hostname, int type,
 159                                            int port)
 160 {
 161         struct fio_client *client;
 162
 163         client = malloc(sizeof(*client));
 164         memset(client, 0, sizeof(*client));
 165
 166         INIT_FLIST_HEAD(&client->list);
 167         INIT_FLIST_HEAD(&client->hash_list);
 168         INIT_FLIST_HEAD(&client->arg_list);
 169         INIT_FLIST_HEAD(&client->eta_list);
 170         INIT_FLIST_HEAD(&client->cmd_list);
 171
 172         client->hostname = strdup(hostname);
 173
 174         if (type == Fio_client_socket)
 175                 client->is_sock = 1;
 176         else {
 177                 int ipv6;
 178
 179                 ipv6 = type == Fio_client_ipv6;
 180                 if (fio_server_parse_host(hostname, &ipv6,
 181                                                 &client->addr.sin_addr,
 182                                                 &client->addr6.sin6_addr))
 183                         goto err;
 184
 185                 client->port = port;
 186         }
 187
 188         client->fd = -1;
 189         client->ops = ops;
 190
 191         __fio_client_add_cmd_option(client, "fio");
 192
 193         flist_add(&client->list, &client_list);
 194         nr_clients++;
 195         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 196         return client;
 197 err:
 198         free(client);
 199         return NULL;
 200 }
 201
 202 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 203 {
 204         struct fio_client *existing = *cookie;
 205         struct fio_client *client;
 206
 207         if (existing) {
 208                 /*
 209                  * We always add our "exec" name as the option, hence 1
 210                  * means empty.
 211                  */
 212                 if (existing->argc == 1)
 213                         flist_add_tail(&existing->arg_list, &arg_list);
 214                 else {
 215                         while (!flist_empty(&arg_list))
 216                                 flist_del_init(arg_list.next);
 217                 }
 218         }
 219
 220         client = malloc(sizeof(*client));
 221         memset(client, 0, sizeof(*client));
 222
 223         INIT_FLIST_HEAD(&client->list);
 224         INIT_FLIST_HEAD(&client->hash_list);
 225         INIT_FLIST_HEAD(&client->arg_list);
 226         INIT_FLIST_HEAD(&client->eta_list);
 227         INIT_FLIST_HEAD(&client->cmd_list);
 228
 229         if (fio_server_parse_string(hostname, &client->hostname,
 230                                         &client->is_sock, &client->port,
 231                                         &client->addr.sin_addr,
 232                                         &client->addr6.sin6_addr,
 233                                         &client->ipv6))
 234                 return -1;
 235
 236         client->fd = -1;
 237         client->ops = ops;
 238
 239         __fio_client_add_cmd_option(client, "fio");
 240
 241         flist_add(&client->list, &client_list);
 242         nr_clients++;
 243         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 244         *cookie = client;
 245         return 0;
 246 }
 247
 248 static int fio_client_connect_ip(struct fio_client *client)
 249 {
 250         struct sockaddr *addr;
 251         fio_socklen_t socklen;
 252         int fd, domain;
 253
 254         if (client->ipv6) {
 255                 client->addr6.sin6_family = AF_INET6;
 256                 client->addr6.sin6_port = htons(client->port);
 257                 domain = AF_INET6;
 258                 addr = (struct sockaddr *) &client->addr6;
 259                 socklen = sizeof(client->addr6);
 260         } else {
 261                 client->addr.sin_family = AF_INET;
 262                 client->addr.sin_port = htons(client->port);
 263                 domain = AF_INET;
 264                 addr = (struct sockaddr *) &client->addr;
 265                 socklen = sizeof(client->addr);
 266         }
 267
 268         fd = socket(domain, SOCK_STREAM, 0);
 269         if (fd < 0) {
 270                 log_err("fio: socket: %s\n", strerror(errno));
 271                 return -1;
 272         }
 273
 274         if (connect(fd, addr, socklen) < 0) {
 275                 log_err("fio: connect: %s\n", strerror(errno));
 276                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 277                                                                 client->port);
 278                 close(fd);
 279                 return -1;
 280         }
 281
 282         return fd;
 283 }
 284
 285 static int fio_client_connect_sock(struct fio_client *client)
 286 {
 287         struct sockaddr_un *addr = &client->addr_un;
 288         fio_socklen_t len;
 289         int fd;
 290
 291         memset(addr, 0, sizeof(*addr));
 292         addr->sun_family = AF_UNIX;
 293         strcpy(addr->sun_path, client->hostname);
 294
 295         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 296         if (fd < 0) {
 297                 log_err("fio: socket: %s\n", strerror(errno));
 298                 return -1;
 299         }
 300
 301         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 302         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 303                 log_err("fio: connect; %s\n", strerror(errno));
 304                 close(fd);
 305                 return -1;
 306         }
 307
 308         return fd;
 309 }
 310
 311 static int fio_client_connect(struct fio_client *client)
 312 {
 313         int fd;
 314
 315         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 316
 317         if (client->is_sock)
 318                 fd = fio_client_connect_sock(client);
 319         else
 320                 fd = fio_client_connect_ip(client);
 321
 322         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 323
 324         if (fd < 0)
 325                 return 1;
 326
 327         client->fd = fd;
 328         fio_client_add_hash(client);
 329         client->state = Client_connected;
 330         return 0;
 331 }
 332
 333 void fio_clients_terminate(void)
 334 {
 335         struct flist_head *entry;
 336         struct fio_client *client;
 337
 338         dprint(FD_NET, "client: terminate clients\n");
 339
 340         flist_for_each(entry, &client_list) {
 341                 client = flist_entry(entry, struct fio_client, list);
 342
 343                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 344         }
 345 }
 346
 347 static void sig_int(int sig)
 348 {
 349         dprint(FD_NET, "client: got signal %d\n", sig);
 350         fio_clients_terminate();
 351 }
 352
 353 static void client_signal_handler(void)
 354 {
 355         struct sigaction act;
 356
 357         memset(&act, 0, sizeof(act));
 358         act.sa_handler = sig_int;
 359         act.sa_flags = SA_RESTART;
 360         sigaction(SIGINT, &act, NULL);
 361
 362         memset(&act, 0, sizeof(act));
 363         act.sa_handler = sig_int;
 364         act.sa_flags = SA_RESTART;
 365         sigaction(SIGTERM, &act, NULL);
 366 }
 367
 368 static void probe_client(struct fio_client *client)
 369 {
 370         dprint(FD_NET, "client: send probe\n");
 371
 372         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 373 }
 374
 375 static int send_client_cmd_line(struct fio_client *client)
 376 {
 377         struct cmd_single_line_pdu *cslp;
 378         struct cmd_line_pdu *clp;
 379         unsigned long offset;
 380         unsigned int *lens;
 381         void *pdu;
 382         size_t mem;
 383         int i, ret;
 384
 385         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 386
 387         lens = malloc(client->argc * sizeof(unsigned int));
 388
 389         /*
 390          * Find out how much mem we need
 391          */
 392         for (i = 0, mem = 0; i < client->argc; i++) {
 393                 lens[i] = strlen(client->argv[i]) + 1;
 394                 mem += lens[i];
 395         }
 396
 397         /*
 398          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 399          */
 400         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 401
 402         pdu = malloc(mem);
 403         clp = pdu;
 404         offset = sizeof(*clp);
 405
 406         for (i = 0; i < client->argc; i++) {
 407                 uint16_t arg_len = lens[i];
 408
 409                 cslp = pdu + offset;
 410                 strcpy((char *) cslp->text, client->argv[i]);
 411                 cslp->len = cpu_to_le16(arg_len);
 412                 offset += sizeof(*cslp) + arg_len;
 413         }
 414
 415         free(lens);
 416         clp->lines = cpu_to_le16(client->argc);
 417         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 418         free(pdu);
 419         return ret;
 420 }
 421
 422 int fio_clients_connect(void)
 423 {
 424         struct fio_client *client;
 425         struct flist_head *entry, *tmp;
 426         int ret;
 427
 428 #ifdef WIN32
 429         WSADATA wsd;
 430         WSAStartup(MAKEWORD(2,2), &wsd);
 431 #endif
 432
 433         dprint(FD_NET, "client: connect all\n");
 434
 435         client_signal_handler();
 436
 437         flist_for_each_safe(entry, tmp, &client_list) {
 438                 client = flist_entry(entry, struct fio_client, list);
 439
 440                 ret = fio_client_connect(client);
 441                 if (ret) {
 442                         remove_client(client);
 443                         continue;
 444                 }
 445
 446                 probe_client(client);
 447
 448                 if (client->argc > 1)
 449                         send_client_cmd_line(client);
 450         }
 451
 452         return !nr_clients;
 453 }
 454
 455 /*
 456  * Send file contents to server backend. We could use sendfile(), but to remain
 457  * more portable lets just read/write the darn thing.
 458  */
 459 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 460 {
 461         struct stat sb;
 462         char *p, *buf;
 463         off_t len;
 464         int fd, ret;
 465
 466         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 467
 468         fd = open(filename, O_RDONLY);
 469         if (fd < 0) {
 470                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 471                 return 1;
 472         }
 473
 474         if (fstat(fd, &sb) < 0) {
 475                 log_err("fio: job file stat: %s\n", strerror(errno));
 476                 close(fd);
 477                 return 1;
 478         }
 479
 480         buf = malloc(sb.st_size);
 481
 482         len = sb.st_size;
 483         p = buf;
 484         do {
 485                 ret = read(fd, p, len);
 486                 if (ret > 0) {
 487                         len -= ret;
 488                         if (!len)
 489                                 break;
 490                         p += ret;
 491                         continue;
 492                 } else if (!ret)
 493                         break;
 494                 else if (errno == EAGAIN || errno == EINTR)
 495                         continue;
 496         } while (1);
 497
 498         if (len) {
 499                 log_err("fio: failed reading job file %s\n", filename);
 500                 close(fd);
 501                 free(buf);
 502                 return 1;
 503         }
 504
 505         client->sent_job = 1;
 506         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 507         free(buf);
 508         close(fd);
 509         return ret;
 510 }
 511
 512 int fio_clients_send_ini(const char *filename)
 513 {
 514         struct fio_client *client;
 515         struct flist_head *entry, *tmp;
 516
 517         flist_for_each_safe(entry, tmp, &client_list) {
 518                 client = flist_entry(entry, struct fio_client, list);
 519
 520                 if (fio_client_send_ini(client, filename))
 521                         remove_client(client);
 522
 523                 client->sent_job = 1;
 524         }
 525
 526         return !nr_clients;
 527 }
 528
 529 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 530 {
 531         dst->max_val    = le64_to_cpu(src->max_val);
 532         dst->min_val    = le64_to_cpu(src->min_val);
 533         dst->samples    = le64_to_cpu(src->samples);
 534
 535         /*
 536          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 537          */
 538         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 539         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 540 }
 541
 542 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 543 {
 544         int i, j;
 545
 546         dst->error      = le32_to_cpu(src->error);
 547         dst->groupid    = le32_to_cpu(src->groupid);
 548         dst->pid        = le32_to_cpu(src->pid);
 549         dst->members    = le32_to_cpu(src->members);
 550
 551         for (i = 0; i < 2; i++) {
 552                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 553                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 554                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 555                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 556         }
 557
 558         dst->usr_time           = le64_to_cpu(src->usr_time);
 559         dst->sys_time           = le64_to_cpu(src->sys_time);
 560         dst->ctx                = le64_to_cpu(src->ctx);
 561         dst->minf               = le64_to_cpu(src->minf);
 562         dst->majf               = le64_to_cpu(src->majf);
 563         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 564
 565         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 566                 fio_fp64_t *fps = &src->percentile_list[i];
 567                 fio_fp64_t *fpd = &dst->percentile_list[i];
 568
 569                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 570         }
 571
 572         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 573                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 574                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 575                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 576         }
 577
 578         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 579                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 580                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 581         }
 582
 583         for (i = 0; i < 2; i++)
 584                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 585                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 586
 587         for (i = 0; i < 3; i++) {
 588                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 589                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 590         }
 591
 592         dst->total_submit       = le64_to_cpu(src->total_submit);
 593         dst->total_complete     = le64_to_cpu(src->total_complete);
 594
 595         for (i = 0; i < 2; i++) {
 596                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 597                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 598         }
 599
 600         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 601         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 602         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 603         dst->first_error        = le32_to_cpu(src->first_error);
 604         dst->kb_base            = le32_to_cpu(src->kb_base);
 605 }
 606
 607 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 608 {
 609         int i;
 610
 611         for (i = 0; i < 2; i++) {
 612                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 613                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 614                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 615                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 616                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 617                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 618         }
 619
 620         dst->kb_base    = le32_to_cpu(src->kb_base);
 621         dst->groupid    = le32_to_cpu(src->groupid);
 622 }
 623
 624 static void handle_ts(struct fio_net_cmd *cmd)
 625 {
 626         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 627
 628         show_thread_status(&p->ts, &p->rs);
 629
 630         if (sum_stat_clients == 1)
 631                 return;
 632
 633         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 634         sum_group_stats(&client_gs, &p->rs);
 635
 636         client_ts.members++;
 637         client_ts.groupid = p->ts.groupid;
 638
 639         if (++sum_stat_nr == sum_stat_clients) {
 640                 strcpy(client_ts.name, "All clients");
 641                 show_thread_status(&client_ts, &client_gs);
 642         }
 643 }
 644
 645 static void handle_gs(struct fio_net_cmd *cmd)
 646 {
 647         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 648
 649         show_group_stats(gs);
 650 }
 651
 652 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 653 {
 654         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 655         const char *buf = (const char *) pdu->buf;
 656         const char *name;
 657         int fio_unused ret;
 658
 659         name = client->name ? client->name : client->hostname;
 660
 661         if (!client->skip_newline)
 662                 fprintf(f_out, "<%s> ", name);
 663         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 664         fflush(f_out);
 665         client->skip_newline = strchr(buf, '\n') == NULL;
 666 }
 667
 668 static void convert_agg(struct disk_util_agg *agg)
 669 {
 670         int i;
 671
 672         for (i = 0; i < 2; i++) {
 673                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 674                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 675                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 676                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 677         }
 678
 679         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 680         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 681         agg->slavecount         = le32_to_cpu(agg->slavecount);
 682         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 683 }
 684
 685 static void convert_dus(struct disk_util_stat *dus)
 686 {
 687         int i;
 688
 689         for (i = 0; i < 2; i++) {
 690                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 691                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 692                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 693                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 694         }
 695
 696         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 697         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 698         dus->msec               = le64_to_cpu(dus->msec);
 699 }
 700
 701 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 702 {
 703         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 704
 705         if (!client->disk_stats_shown) {
 706                 client->disk_stats_shown = 1;
 707                 log_info("\nDisk stats (read/write):\n");
 708         }
 709
 710         print_disk_util(&du->dus, &du->agg, terse_output);
 711 }
 712
 713 static void convert_jobs_eta(struct jobs_eta *je)
 714 {
 715         int i;
 716
 717         je->nr_running          = le32_to_cpu(je->nr_running);
 718         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 719         je->nr_pending          = le32_to_cpu(je->nr_pending);
 720         je->files_open          = le32_to_cpu(je->files_open);
 721
 722         for (i = 0; i < 2; i++) {
 723                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 724                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 725                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 726                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 727                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 728                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 729         }
 730
 731         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 732         je->eta_sec             = le64_to_cpu(je->eta_sec);
 733 }
 734
 735 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 736 {
 737         int i;
 738
 739         dst->nr_running         += je->nr_running;
 740         dst->nr_ramp            += je->nr_ramp;
 741         dst->nr_pending         += je->nr_pending;
 742         dst->files_open         += je->files_open;
 743
 744         for (i = 0; i < 2; i++) {
 745                 dst->m_rate[i]  += je->m_rate[i];
 746                 dst->t_rate[i]  += je->t_rate[i];
 747                 dst->m_iops[i]  += je->m_iops[i];
 748                 dst->t_iops[i]  += je->t_iops[i];
 749                 dst->rate[i]    += je->rate[i];
 750                 dst->iops[i]    += je->iops[i];
 751         }
 752
 753         dst->elapsed_sec        += je->elapsed_sec;
 754
 755         if (je->eta_sec > dst->eta_sec)
 756                 dst->eta_sec = je->eta_sec;
 757 }
 758
 759 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 760 {
 761         if (!--eta->pending) {
 762                 eta_fn(&eta->eta);
 763                 free(eta);
 764         }
 765 }
 766
 767 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 768 {
 769         struct fio_net_int_cmd *icmd = NULL;
 770         struct flist_head *entry;
 771
 772         flist_for_each(entry, &client->cmd_list) {
 773                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 774
 775                 if (cmd->tag == (uintptr_t) icmd)
 776                         break;
 777
 778                 icmd = NULL;
 779         }
 780
 781         if (!icmd) {
 782                 log_err("fio: client: unable to find matching tag\n");
 783                 return;
 784         }
 785
 786         flist_del(&icmd->list);
 787         cmd->tag = icmd->saved_tag;
 788         free(icmd);
 789 }
 790
 791 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 792 {
 793         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 794         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 795
 796         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 797
 798         assert(client->eta_in_flight == eta);
 799
 800         client->eta_in_flight = NULL;
 801         flist_del_init(&client->eta_list);
 802
 803         fio_client_sum_jobs_eta(&eta->eta, je);
 804         fio_client_dec_jobs_eta(eta, client->ops->eta);
 805 }
 806
 807 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 808 {
 809         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 810         const char *os, *arch;
 811         char bit[16];
 812
 813         os = fio_get_os_string(probe->os);
 814         if (!os)
 815                 os = "unknown";
 816
 817         arch = fio_get_arch_string(probe->arch);
 818         if (!arch)
 819                 os = "unknown";
 820
 821         sprintf(bit, "%d-bit", probe->bpp * 8);
 822
 823         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 824                 probe->hostname, probe->bigendian, bit, os, arch,
 825                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 826
 827         if (!client->name)
 828                 client->name = strdup((char *) probe->hostname);
 829 }
 830
 831 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 832 {
 833         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 834
 835         client->state = Client_started;
 836         client->jobs = le32_to_cpu(pdu->jobs);
 837 }
 838
 839 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 840 {
 841         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 842
 843         client->state = Client_stopped;
 844         client->error = le32_to_cpu(pdu->error);
 845
 846         if (client->error)
 847                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 848 }
 849
 850 static void convert_text(struct fio_net_cmd *cmd)
 851 {
 852         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 853
 854         pdu->level      = le32_to_cpu(pdu->level);
 855         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
 856         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
 857         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
 858 }
 859
 860 int fio_handle_client(struct fio_client *client)
 861 {
 862         struct client_ops *ops = client->ops;
 863         struct fio_net_cmd *cmd;
 864
 865         dprint(FD_NET, "client: handle %s\n", client->hostname);
 866
 867         cmd = fio_net_recv_cmd(client->fd);
 868         if (!cmd)
 869                 return 0;
 870
 871         dprint(FD_NET, "client: got cmd op %s from %s\n",
 872                                 fio_server_op(cmd->opcode), client->hostname);
 873
 874         switch (cmd->opcode) {
 875         case FIO_NET_CMD_QUIT:
 876                 if (ops->quit)
 877                         ops->quit(client);
 878                 remove_client(client);
 879                 free(cmd);
 880                 break;
 881         case FIO_NET_CMD_TEXT:
 882                 convert_text(cmd);
 883                 ops->text_op(client, cmd);
 884                 free(cmd);
 885                 break;
 886         case FIO_NET_CMD_DU: {
 887                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 888
 889                 convert_dus(&du->dus);
 890                 convert_agg(&du->agg);
 891
 892                 ops->disk_util(client, cmd);
 893                 free(cmd);
 894                 break;
 895                 }
 896         case FIO_NET_CMD_TS: {
 897                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 898
 899                 convert_ts(&p->ts, &p->ts);
 900                 convert_gs(&p->rs, &p->rs);
 901
 902                 ops->thread_status(cmd);
 903                 free(cmd);
 904                 break;
 905                 }
 906         case FIO_NET_CMD_GS: {
 907                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 908
 909                 convert_gs(gs, gs);
 910
 911                 ops->group_stats(cmd);
 912                 free(cmd);
 913                 break;
 914                 }
 915         case FIO_NET_CMD_ETA: {
 916                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 917
 918                 remove_reply_cmd(client, cmd);
 919                 convert_jobs_eta(je);
 920                 handle_eta(client, cmd);
 921                 free(cmd);
 922                 break;
 923                 }
 924         case FIO_NET_CMD_PROBE:
 925                 remove_reply_cmd(client, cmd);
 926                 ops->probe(client, cmd);
 927                 free(cmd);
 928                 break;
 929         case FIO_NET_CMD_RUN:
 930                 client->state = Client_running;
 931                 free(cmd);
 932                 break;
 933         case FIO_NET_CMD_START:
 934                 handle_start(client, cmd);
 935                 free(cmd);
 936                 break;
 937         case FIO_NET_CMD_STOP:
 938                 handle_stop(client, cmd);
 939                 free(cmd);
 940                 break;
 941         case FIO_NET_CMD_ADD_JOB:
 942                 if (ops->add_job)
 943                         ops->add_job(client, cmd);
 944                 free(cmd);
 945                 break;
 946         default:
 947                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
 948                 free(cmd);
 949                 break;
 950         }
 951
 952         return 1;
 953 }
 954
 955 static void request_client_etas(struct client_ops *ops)
 956 {
 957         struct fio_client *client;
 958         struct flist_head *entry;
 959         struct client_eta *eta;
 960         int skipped = 0;
 961
 962         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
 963
 964         eta = malloc(sizeof(*eta));
 965         memset(&eta->eta, 0, sizeof(eta->eta));
 966         eta->pending = nr_clients;
 967
 968         flist_for_each(entry, &client_list) {
 969                 client = flist_entry(entry, struct fio_client, list);
 970
 971                 if (!flist_empty(&client->eta_list)) {
 972                         skipped++;
 973                         continue;
 974                 }
 975                 if (client->state != Client_running)
 976                         continue;
 977
 978                 assert(!client->eta_in_flight);
 979                 flist_add_tail(&client->eta_list, &eta_list);
 980                 client->eta_in_flight = eta;
 981                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
 982                                         (uintptr_t) eta, &client->cmd_list);
 983         }
 984
 985         while (skipped--)
 986                 fio_client_dec_jobs_eta(eta, ops->eta);
 987
 988         dprint(FD_NET, "client: requested eta tag %p\n", eta);
 989 }
 990
 991 static int client_check_cmd_timeout(struct fio_client *client,
 992                                     struct timeval *now)
 993 {
 994         struct fio_net_int_cmd *cmd;
 995         struct flist_head *entry, *tmp;
 996         int ret = 0;
 997
 998         flist_for_each_safe(entry, tmp, &client->cmd_list) {
 999                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
1000
1001                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1002                         continue;
1003
1004                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1005                                                 fio_server_op(cmd->cmd.opcode));
1006                 flist_del(&cmd->list);
1007                 free(cmd);
1008                 ret = 1;
1009         }
1010
1011         return flist_empty(&client->cmd_list) && ret;
1012 }
1013
1014 static int fio_check_clients_timed_out(void)
1015 {
1016         struct fio_client *client;
1017         struct flist_head *entry, *tmp;
1018         struct timeval tv;
1019         int ret = 0;
1020
1021         gettimeofday(&tv, NULL);
1022
1023         flist_for_each_safe(entry, tmp, &client_list) {
1024                 client = flist_entry(entry, struct fio_client, list);
1025
1026                 if (flist_empty(&client->cmd_list))
1027                         continue;
1028
1029                 if (!client_check_cmd_timeout(client, &tv))
1030                         continue;
1031
1032                 if (client->ops->timed_out)
1033                         client->ops->timed_out(client);
1034                 else
1035                         log_err("fio: client %s timed out\n", client->hostname);
1036
1037                 remove_client(client);
1038                 ret = 1;
1039         }
1040
1041         return ret;
1042 }
1043
1044 int fio_handle_clients(struct client_ops *ops)
1045 {
1046         struct pollfd *pfds;
1047         int i, ret = 0, retval = 0;
1048
1049         gettimeofday(&eta_tv, NULL);
1050
1051         pfds = malloc(nr_clients * sizeof(struct pollfd));
1052
1053         sum_stat_clients = nr_clients;
1054         init_thread_stat(&client_ts);
1055         init_group_run_stat(&client_gs);
1056
1057         while (!exit_backend && nr_clients) {
1058                 struct flist_head *entry, *tmp;
1059                 struct fio_client *client;
1060
1061                 i = 0;
1062                 flist_for_each_safe(entry, tmp, &client_list) {
1063                         client = flist_entry(entry, struct fio_client, list);
1064
1065                         if (!client->sent_job && !client->ops->stay_connected &&
1066                             flist_empty(&client->cmd_list)) {
1067                                 remove_client(client);
1068                                 continue;
1069                         }
1070
1071                         pfds[i].fd = client->fd;
1072                         pfds[i].events = POLLIN;
1073                         i++;
1074                 }
1075
1076                 if (!nr_clients)
1077                         break;
1078
1079                 assert(i == nr_clients);
1080
1081                 do {
1082                         struct timeval tv;
1083
1084                         gettimeofday(&tv, NULL);
1085                         if (mtime_since(&eta_tv, &tv) >= 900) {
1086                                 request_client_etas(ops);
1087                                 memcpy(&eta_tv, &tv, sizeof(tv));
1088
1089                                 if (fio_check_clients_timed_out())
1090                                         break;
1091                         }
1092
1093                         ret = poll(pfds, nr_clients, 100);
1094                         if (ret < 0) {
1095                                 if (errno == EINTR)
1096                                         continue;
1097                                 log_err("fio: poll clients: %s\n", strerror(errno));
1098                                 break;
1099                         } else if (!ret)
1100                                 continue;
1101                 } while (ret <= 0);
1102
1103                 for (i = 0; i < nr_clients; i++) {
1104                         if (!(pfds[i].revents & POLLIN))
1105                                 continue;
1106
1107                         client = find_client_by_fd(pfds[i].fd);
1108                         if (!client) {
1109                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1110                                 continue;
1111                         }
1112                         if (!fio_handle_client(client)) {
1113                                 log_info("client: host=%s disconnected\n",
1114                                                 client->hostname);
1115                                 remove_client(client);
1116                                 retval = 1;
1117                         } else if (client->error)
1118                                 retval = 1;
1119                 }
1120         }
1121
1122         free(pfds);
1123         return retval;
1124 }