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
  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 struct thread_stat client_ts;
  56 struct group_run_stats client_gs;
  57 int sum_stat_clients;
  58
  59 static int sum_stat_nr;
  60
  61 #define FIO_CLIENT_HASH_BITS    7
  62 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  63 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  64 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  65
  66 static void fio_client_add_hash(struct fio_client *client)
  67 {
  68         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  69
  70         bucket &= FIO_CLIENT_HASH_MASK;
  71         flist_add(&client->hash_list, &client_hash[bucket]);
  72 }
  73
  74 static void fio_client_remove_hash(struct fio_client *client)
  75 {
  76         if (!flist_empty(&client->hash_list))
  77                 flist_del_init(&client->hash_list);
  78 }
  79
  80 static void fio_init fio_client_hash_init(void)
  81 {
  82         int i;
  83
  84         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  85                 INIT_FLIST_HEAD(&client_hash[i]);
  86 }
  87
  88 static struct fio_client *find_client_by_fd(int fd)
  89 {
  90         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  91         struct fio_client *client;
  92         struct flist_head *entry;
  93
  94         flist_for_each(entry, &client_hash[bucket]) {
  95                 client = flist_entry(entry, struct fio_client, hash_list);
  96
  97                 if (client->fd == fd) {
  98                         client->refs++;
  99                         return client;
 100                 }
 101         }
 102
 103         return NULL;
 104 }
 105
 106 static void remove_client(struct fio_client *client)
 107 {
 108         assert(client->refs);
 109
 110         if (--client->refs)
 111                 return;
 112
 113         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 114         flist_del(&client->list);
 115
 116         fio_client_remove_hash(client);
 117
 118         if (!flist_empty(&client->eta_list)) {
 119                 flist_del_init(&client->eta_list);
 120                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 121         }
 122
 123         free(client->hostname);
 124         if (client->argv)
 125                 free(client->argv);
 126         if (client->name)
 127                 free(client->name);
 128
 129         free(client);
 130         nr_clients--;
 131         sum_stat_clients--;
 132 }
 133
 134 static void put_client(struct fio_client *client)
 135 {
 136         remove_client(client);
 137 }
 138
 139 static void __fio_client_add_cmd_option(struct fio_client *client,
 140                                         const char *opt)
 141 {
 142         int index;
 143
 144         index = client->argc++;
 145         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 146         client->argv[index] = strdup(opt);
 147         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 148 }
 149
 150 void fio_client_add_cmd_option(void *cookie, const char *opt)
 151 {
 152         struct fio_client *client = cookie;
 153         struct flist_head *entry;
 154
 155         if (!client || !opt)
 156                 return;
 157
 158         __fio_client_add_cmd_option(client, opt);
 159
 160         /*
 161          * Duplicate arguments to shared client group
 162          */
 163         flist_for_each(entry, &arg_list) {
 164                 client = flist_entry(entry, struct fio_client, arg_list);
 165
 166                 __fio_client_add_cmd_option(client, opt);
 167         }
 168 }
 169
 170 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 171                                            const char *hostname, int type,
 172                                            int port)
 173 {
 174         struct fio_client *client;
 175
 176         client = malloc(sizeof(*client));
 177         memset(client, 0, sizeof(*client));
 178
 179         INIT_FLIST_HEAD(&client->list);
 180         INIT_FLIST_HEAD(&client->hash_list);
 181         INIT_FLIST_HEAD(&client->arg_list);
 182         INIT_FLIST_HEAD(&client->eta_list);
 183         INIT_FLIST_HEAD(&client->cmd_list);
 184
 185         client->hostname = strdup(hostname);
 186
 187         if (type == Fio_client_socket)
 188                 client->is_sock = 1;
 189         else {
 190                 int ipv6;
 191
 192                 ipv6 = type == Fio_client_ipv6;
 193                 if (fio_server_parse_host(hostname, &ipv6,
 194                                                 &client->addr.sin_addr,
 195                                                 &client->addr6.sin6_addr))
 196                         goto err;
 197
 198                 client->port = port;
 199         }
 200
 201         client->fd = -1;
 202         client->ops = ops;
 203         client->refs = 1;
 204
 205         __fio_client_add_cmd_option(client, "fio");
 206
 207         flist_add(&client->list, &client_list);
 208         nr_clients++;
 209         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 210         return client;
 211 err:
 212         free(client);
 213         return NULL;
 214 }
 215
 216 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 217 {
 218         struct fio_client *existing = *cookie;
 219         struct fio_client *client;
 220
 221         if (existing) {
 222                 /*
 223                  * We always add our "exec" name as the option, hence 1
 224                  * means empty.
 225                  */
 226                 if (existing->argc == 1)
 227                         flist_add_tail(&existing->arg_list, &arg_list);
 228                 else {
 229                         while (!flist_empty(&arg_list))
 230                                 flist_del_init(arg_list.next);
 231                 }
 232         }
 233
 234         client = malloc(sizeof(*client));
 235         memset(client, 0, sizeof(*client));
 236
 237         INIT_FLIST_HEAD(&client->list);
 238         INIT_FLIST_HEAD(&client->hash_list);
 239         INIT_FLIST_HEAD(&client->arg_list);
 240         INIT_FLIST_HEAD(&client->eta_list);
 241         INIT_FLIST_HEAD(&client->cmd_list);
 242
 243         if (fio_server_parse_string(hostname, &client->hostname,
 244                                         &client->is_sock, &client->port,
 245                                         &client->addr.sin_addr,
 246                                         &client->addr6.sin6_addr,
 247                                         &client->ipv6))
 248                 return -1;
 249
 250         client->fd = -1;
 251         client->ops = ops;
 252         client->refs = 1;
 253
 254         __fio_client_add_cmd_option(client, "fio");
 255
 256         flist_add(&client->list, &client_list);
 257         nr_clients++;
 258         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 259         *cookie = client;
 260         return 0;
 261 }
 262
 263 static int fio_client_connect_ip(struct fio_client *client)
 264 {
 265         struct sockaddr *addr;
 266         fio_socklen_t socklen;
 267         int fd, domain;
 268
 269         if (client->ipv6) {
 270                 client->addr6.sin6_family = AF_INET6;
 271                 client->addr6.sin6_port = htons(client->port);
 272                 domain = AF_INET6;
 273                 addr = (struct sockaddr *) &client->addr6;
 274                 socklen = sizeof(client->addr6);
 275         } else {
 276                 client->addr.sin_family = AF_INET;
 277                 client->addr.sin_port = htons(client->port);
 278                 domain = AF_INET;
 279                 addr = (struct sockaddr *) &client->addr;
 280                 socklen = sizeof(client->addr);
 281         }
 282
 283         fd = socket(domain, SOCK_STREAM, 0);
 284         if (fd < 0) {
 285                 log_err("fio: socket: %s\n", strerror(errno));
 286                 return -1;
 287         }
 288
 289         if (connect(fd, addr, socklen) < 0) {
 290                 log_err("fio: connect: %s\n", strerror(errno));
 291                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 292                                                                 client->port);
 293                 close(fd);
 294                 return -1;
 295         }
 296
 297         return fd;
 298 }
 299
 300 static int fio_client_connect_sock(struct fio_client *client)
 301 {
 302         struct sockaddr_un *addr = &client->addr_un;
 303         fio_socklen_t len;
 304         int fd;
 305
 306         memset(addr, 0, sizeof(*addr));
 307         addr->sun_family = AF_UNIX;
 308         strcpy(addr->sun_path, client->hostname);
 309
 310         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 311         if (fd < 0) {
 312                 log_err("fio: socket: %s\n", strerror(errno));
 313                 return -1;
 314         }
 315
 316         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 317         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 318                 log_err("fio: connect; %s\n", strerror(errno));
 319                 close(fd);
 320                 return -1;
 321         }
 322
 323         return fd;
 324 }
 325
 326 static int fio_client_connect(struct fio_client *client)
 327 {
 328         int fd;
 329
 330         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 331
 332         if (client->is_sock)
 333                 fd = fio_client_connect_sock(client);
 334         else
 335                 fd = fio_client_connect_ip(client);
 336
 337         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 338
 339         if (fd < 0)
 340                 return 1;
 341
 342         client->fd = fd;
 343         fio_client_add_hash(client);
 344         client->state = Client_connected;
 345         return 0;
 346 }
 347
 348 void fio_clients_terminate(void)
 349 {
 350         struct flist_head *entry;
 351         struct fio_client *client;
 352
 353         dprint(FD_NET, "client: terminate clients\n");
 354
 355         flist_for_each(entry, &client_list) {
 356                 client = flist_entry(entry, struct fio_client, list);
 357
 358                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 359         }
 360 }
 361
 362 static void sig_int(int sig)
 363 {
 364         dprint(FD_NET, "client: got signal %d\n", sig);
 365         fio_clients_terminate();
 366 }
 367
 368 static void client_signal_handler(void)
 369 {
 370         struct sigaction act;
 371
 372         memset(&act, 0, sizeof(act));
 373         act.sa_handler = sig_int;
 374         act.sa_flags = SA_RESTART;
 375         sigaction(SIGINT, &act, NULL);
 376
 377         memset(&act, 0, sizeof(act));
 378         act.sa_handler = sig_int;
 379         act.sa_flags = SA_RESTART;
 380         sigaction(SIGTERM, &act, NULL);
 381 }
 382
 383 static void probe_client(struct fio_client *client)
 384 {
 385         dprint(FD_NET, "client: send probe\n");
 386
 387         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 388 }
 389
 390 static int send_client_cmd_line(struct fio_client *client)
 391 {
 392         struct cmd_single_line_pdu *cslp;
 393         struct cmd_line_pdu *clp;
 394         unsigned long offset;
 395         unsigned int *lens;
 396         void *pdu;
 397         size_t mem;
 398         int i, ret;
 399
 400         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 401
 402         lens = malloc(client->argc * sizeof(unsigned int));
 403
 404         /*
 405          * Find out how much mem we need
 406          */
 407         for (i = 0, mem = 0; i < client->argc; i++) {
 408                 lens[i] = strlen(client->argv[i]) + 1;
 409                 mem += lens[i];
 410         }
 411
 412         /*
 413          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 414          */
 415         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 416
 417         pdu = malloc(mem);
 418         clp = pdu;
 419         offset = sizeof(*clp);
 420
 421         for (i = 0; i < client->argc; i++) {
 422                 uint16_t arg_len = lens[i];
 423
 424                 cslp = pdu + offset;
 425                 strcpy((char *) cslp->text, client->argv[i]);
 426                 cslp->len = cpu_to_le16(arg_len);
 427                 offset += sizeof(*cslp) + arg_len;
 428         }
 429
 430         free(lens);
 431         clp->lines = cpu_to_le16(client->argc);
 432         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 433         free(pdu);
 434         return ret;
 435 }
 436
 437 int fio_clients_connect(void)
 438 {
 439         struct fio_client *client;
 440         struct flist_head *entry, *tmp;
 441         int ret;
 442
 443 #ifdef WIN32
 444         WSADATA wsd;
 445         WSAStartup(MAKEWORD(2,2), &wsd);
 446 #endif
 447
 448         dprint(FD_NET, "client: connect all\n");
 449
 450         client_signal_handler();
 451
 452         flist_for_each_safe(entry, tmp, &client_list) {
 453                 client = flist_entry(entry, struct fio_client, list);
 454
 455                 ret = fio_client_connect(client);
 456                 if (ret) {
 457                         remove_client(client);
 458                         continue;
 459                 }
 460
 461                 probe_client(client);
 462
 463                 if (client->argc > 1)
 464                         send_client_cmd_line(client);
 465         }
 466
 467         return !nr_clients;
 468 }
 469
 470 /*
 471  * Send file contents to server backend. We could use sendfile(), but to remain
 472  * more portable lets just read/write the darn thing.
 473  */
 474 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 475 {
 476         struct stat sb;
 477         char *p, *buf;
 478         off_t len;
 479         int fd, ret;
 480
 481         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 482
 483         fd = open(filename, O_RDONLY);
 484         if (fd < 0) {
 485                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 486                 return 1;
 487         }
 488
 489         if (fstat(fd, &sb) < 0) {
 490                 log_err("fio: job file stat: %s\n", strerror(errno));
 491                 close(fd);
 492                 return 1;
 493         }
 494
 495         buf = malloc(sb.st_size);
 496
 497         len = sb.st_size;
 498         p = buf;
 499         do {
 500                 ret = read(fd, p, len);
 501                 if (ret > 0) {
 502                         len -= ret;
 503                         if (!len)
 504                                 break;
 505                         p += ret;
 506                         continue;
 507                 } else if (!ret)
 508                         break;
 509                 else if (errno == EAGAIN || errno == EINTR)
 510                         continue;
 511         } while (1);
 512
 513         if (len) {
 514                 log_err("fio: failed reading job file %s\n", filename);
 515                 close(fd);
 516                 free(buf);
 517                 return 1;
 518         }
 519
 520         client->sent_job = 1;
 521         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 522         free(buf);
 523         close(fd);
 524         return ret;
 525 }
 526
 527 int fio_clients_send_ini(const char *filename)
 528 {
 529         struct fio_client *client;
 530         struct flist_head *entry, *tmp;
 531
 532         flist_for_each_safe(entry, tmp, &client_list) {
 533                 client = flist_entry(entry, struct fio_client, list);
 534
 535                 if (fio_client_send_ini(client, filename))
 536                         remove_client(client);
 537
 538                 client->sent_job = 1;
 539         }
 540
 541         return !nr_clients;
 542 }
 543
 544 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 545 {
 546         dst->max_val    = le64_to_cpu(src->max_val);
 547         dst->min_val    = le64_to_cpu(src->min_val);
 548         dst->samples    = le64_to_cpu(src->samples);
 549
 550         /*
 551          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 552          */
 553         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 554         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 555 }
 556
 557 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 558 {
 559         int i, j;
 560
 561         dst->error      = le32_to_cpu(src->error);
 562         dst->groupid    = le32_to_cpu(src->groupid);
 563         dst->pid        = le32_to_cpu(src->pid);
 564         dst->members    = le32_to_cpu(src->members);
 565
 566         for (i = 0; i < 2; i++) {
 567                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 568                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 569                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 570                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 571         }
 572
 573         dst->usr_time           = le64_to_cpu(src->usr_time);
 574         dst->sys_time           = le64_to_cpu(src->sys_time);
 575         dst->ctx                = le64_to_cpu(src->ctx);
 576         dst->minf               = le64_to_cpu(src->minf);
 577         dst->majf               = le64_to_cpu(src->majf);
 578         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 579
 580         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 581                 fio_fp64_t *fps = &src->percentile_list[i];
 582                 fio_fp64_t *fpd = &dst->percentile_list[i];
 583
 584                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 585         }
 586
 587         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 588                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 589                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 590                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 591         }
 592
 593         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 594                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 595                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 596         }
 597
 598         for (i = 0; i < 2; i++)
 599                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 600                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 601
 602         for (i = 0; i < 3; i++) {
 603                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 604                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 605         }
 606
 607         dst->total_submit       = le64_to_cpu(src->total_submit);
 608         dst->total_complete     = le64_to_cpu(src->total_complete);
 609
 610         for (i = 0; i < 2; i++) {
 611                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 612                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 613         }
 614
 615         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 616         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 617         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 618         dst->first_error        = le32_to_cpu(src->first_error);
 619         dst->kb_base            = le32_to_cpu(src->kb_base);
 620 }
 621
 622 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 623 {
 624         int i;
 625
 626         for (i = 0; i < 2; i++) {
 627                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 628                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 629                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 630                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 631                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 632                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 633         }
 634
 635         dst->kb_base    = le32_to_cpu(src->kb_base);
 636         dst->groupid    = le32_to_cpu(src->groupid);
 637 }
 638
 639 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 640 {
 641         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 642
 643         show_thread_status(&p->ts, &p->rs);
 644
 645         if (sum_stat_clients == 1)
 646                 return;
 647
 648         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 649         sum_group_stats(&client_gs, &p->rs);
 650
 651         client_ts.members++;
 652         client_ts.groupid = p->ts.groupid;
 653
 654         if (++sum_stat_nr == sum_stat_clients) {
 655                 strcpy(client_ts.name, "All clients");
 656                 show_thread_status(&client_ts, &client_gs);
 657         }
 658 }
 659
 660 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 661 {
 662         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 663
 664         show_group_stats(gs);
 665 }
 666
 667 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 668 {
 669         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 670         const char *buf = (const char *) pdu->buf;
 671         const char *name;
 672         int fio_unused ret;
 673
 674         name = client->name ? client->name : client->hostname;
 675
 676         if (!client->skip_newline)
 677                 fprintf(f_out, "<%s> ", name);
 678         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 679         fflush(f_out);
 680         client->skip_newline = strchr(buf, '\n') == NULL;
 681 }
 682
 683 static void convert_agg(struct disk_util_agg *agg)
 684 {
 685         int i;
 686
 687         for (i = 0; i < 2; i++) {
 688                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 689                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 690                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 691                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 692         }
 693
 694         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 695         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 696         agg->slavecount         = le32_to_cpu(agg->slavecount);
 697         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 698 }
 699
 700 static void convert_dus(struct disk_util_stat *dus)
 701 {
 702         int i;
 703
 704         for (i = 0; i < 2; i++) {
 705                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 706                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 707                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 708                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 709         }
 710
 711         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 712         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 713         dus->msec               = le64_to_cpu(dus->msec);
 714 }
 715
 716 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 717 {
 718         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 719
 720         if (!client->disk_stats_shown) {
 721                 client->disk_stats_shown = 1;
 722                 log_info("\nDisk stats (read/write):\n");
 723         }
 724
 725         print_disk_util(&du->dus, &du->agg, terse_output);
 726 }
 727
 728 static void convert_jobs_eta(struct jobs_eta *je)
 729 {
 730         int i;
 731
 732         je->nr_running          = le32_to_cpu(je->nr_running);
 733         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 734         je->nr_pending          = le32_to_cpu(je->nr_pending);
 735         je->files_open          = le32_to_cpu(je->files_open);
 736
 737         for (i = 0; i < 2; i++) {
 738                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 739                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 740                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 741                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 742                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 743                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 744         }
 745
 746         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 747         je->eta_sec             = le64_to_cpu(je->eta_sec);
 748 }
 749
 750 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 751 {
 752         int i;
 753
 754         dst->nr_running         += je->nr_running;
 755         dst->nr_ramp            += je->nr_ramp;
 756         dst->nr_pending         += je->nr_pending;
 757         dst->files_open         += je->files_open;
 758
 759         for (i = 0; i < 2; i++) {
 760                 dst->m_rate[i]  += je->m_rate[i];
 761                 dst->t_rate[i]  += je->t_rate[i];
 762                 dst->m_iops[i]  += je->m_iops[i];
 763                 dst->t_iops[i]  += je->t_iops[i];
 764                 dst->rate[i]    += je->rate[i];
 765                 dst->iops[i]    += je->iops[i];
 766         }
 767
 768         dst->elapsed_sec        += je->elapsed_sec;
 769
 770         if (je->eta_sec > dst->eta_sec)
 771                 dst->eta_sec = je->eta_sec;
 772 }
 773
 774 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 775 {
 776         if (!--eta->pending) {
 777                 eta_fn(&eta->eta);
 778                 free(eta);
 779         }
 780 }
 781
 782 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 783 {
 784         struct fio_net_int_cmd *icmd = NULL;
 785         struct flist_head *entry;
 786
 787         flist_for_each(entry, &client->cmd_list) {
 788                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 789
 790                 if (cmd->tag == (uintptr_t) icmd)
 791                         break;
 792
 793                 icmd = NULL;
 794         }
 795
 796         if (!icmd) {
 797                 log_err("fio: client: unable to find matching tag\n");
 798                 return;
 799         }
 800
 801         flist_del(&icmd->list);
 802         cmd->tag = icmd->saved_tag;
 803         free(icmd);
 804 }
 805
 806 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 807 {
 808         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 809         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 810
 811         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 812
 813         assert(client->eta_in_flight == eta);
 814
 815         client->eta_in_flight = NULL;
 816         flist_del_init(&client->eta_list);
 817
 818         fio_client_sum_jobs_eta(&eta->eta, je);
 819         fio_client_dec_jobs_eta(eta, client->ops->eta);
 820 }
 821
 822 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 823 {
 824         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 825         const char *os, *arch;
 826         char bit[16];
 827
 828         os = fio_get_os_string(probe->os);
 829         if (!os)
 830                 os = "unknown";
 831
 832         arch = fio_get_arch_string(probe->arch);
 833         if (!arch)
 834                 os = "unknown";
 835
 836         sprintf(bit, "%d-bit", probe->bpp * 8);
 837
 838         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 839                 probe->hostname, probe->bigendian, bit, os, arch,
 840                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 841
 842         if (!client->name)
 843                 client->name = strdup((char *) probe->hostname);
 844 }
 845
 846 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 847 {
 848         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 849
 850         client->state = Client_started;
 851         client->jobs = le32_to_cpu(pdu->jobs);
 852 }
 853
 854 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 855 {
 856         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 857
 858         client->state = Client_stopped;
 859         client->error = le32_to_cpu(pdu->error);
 860
 861         if (client->error)
 862                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 863 }
 864
 865 static void convert_text(struct fio_net_cmd *cmd)
 866 {
 867         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 868
 869         pdu->level      = le32_to_cpu(pdu->level);
 870         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
 871         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
 872         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
 873 }
 874
 875 int fio_handle_client(struct fio_client *client)
 876 {
 877         struct client_ops *ops = client->ops;
 878         struct fio_net_cmd *cmd;
 879
 880         dprint(FD_NET, "client: handle %s\n", client->hostname);
 881
 882         cmd = fio_net_recv_cmd(client->fd);
 883         if (!cmd)
 884                 return 0;
 885
 886         dprint(FD_NET, "client: got cmd op %s from %s\n",
 887                                 fio_server_op(cmd->opcode), client->hostname);
 888
 889         switch (cmd->opcode) {
 890         case FIO_NET_CMD_QUIT:
 891                 if (ops->quit)
 892                         ops->quit(client);
 893                 remove_client(client);
 894                 free(cmd);
 895                 break;
 896         case FIO_NET_CMD_TEXT:
 897                 convert_text(cmd);
 898                 ops->text_op(client, cmd);
 899                 free(cmd);
 900                 break;
 901         case FIO_NET_CMD_DU: {
 902                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 903
 904                 convert_dus(&du->dus);
 905                 convert_agg(&du->agg);
 906
 907                 ops->disk_util(client, cmd);
 908                 free(cmd);
 909                 break;
 910                 }
 911         case FIO_NET_CMD_TS: {
 912                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 913
 914                 convert_ts(&p->ts, &p->ts);
 915                 convert_gs(&p->rs, &p->rs);
 916
 917                 ops->thread_status(client, cmd);
 918                 free(cmd);
 919                 break;
 920                 }
 921         case FIO_NET_CMD_GS: {
 922                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 923
 924                 convert_gs(gs, gs);
 925
 926                 ops->group_stats(client, cmd);
 927                 free(cmd);
 928                 break;
 929                 }
 930         case FIO_NET_CMD_ETA: {
 931                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 932
 933                 remove_reply_cmd(client, cmd);
 934                 convert_jobs_eta(je);
 935                 handle_eta(client, cmd);
 936                 free(cmd);
 937                 break;
 938                 }
 939         case FIO_NET_CMD_PROBE:
 940                 remove_reply_cmd(client, cmd);
 941                 ops->probe(client, cmd);
 942                 free(cmd);
 943                 break;
 944         case FIO_NET_CMD_RUN:
 945                 client->state = Client_running;
 946                 free(cmd);
 947                 break;
 948         case FIO_NET_CMD_START:
 949                 handle_start(client, cmd);
 950                 free(cmd);
 951                 break;
 952         case FIO_NET_CMD_STOP:
 953                 handle_stop(client, cmd);
 954                 free(cmd);
 955                 break;
 956         case FIO_NET_CMD_ADD_JOB:
 957                 if (ops->add_job)
 958                         ops->add_job(client, cmd);
 959                 free(cmd);
 960                 break;
 961         default:
 962                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
 963                 free(cmd);
 964                 break;
 965         }
 966
 967         return 1;
 968 }
 969
 970 static void request_client_etas(struct client_ops *ops)
 971 {
 972         struct fio_client *client;
 973         struct flist_head *entry;
 974         struct client_eta *eta;
 975         int skipped = 0;
 976
 977         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
 978
 979         eta = malloc(sizeof(*eta));
 980         memset(&eta->eta, 0, sizeof(eta->eta));
 981         eta->pending = nr_clients;
 982
 983         flist_for_each(entry, &client_list) {
 984                 client = flist_entry(entry, struct fio_client, list);
 985
 986                 if (!flist_empty(&client->eta_list)) {
 987                         skipped++;
 988                         continue;
 989                 }
 990                 if (client->state != Client_running)
 991                         continue;
 992
 993                 assert(!client->eta_in_flight);
 994                 flist_add_tail(&client->eta_list, &eta_list);
 995                 client->eta_in_flight = eta;
 996                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
 997                                         (uintptr_t) eta, &client->cmd_list);
 998         }
 999
1000         while (skipped--)
1001                 fio_client_dec_jobs_eta(eta, ops->eta);
1002
1003         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1004 }
1005
1006 static int client_check_cmd_timeout(struct fio_client *client,
1007                                     struct timeval *now)
1008 {
1009         struct fio_net_int_cmd *cmd;
1010         struct flist_head *entry, *tmp;
1011         int ret = 0;
1012
1013         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1014                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
1015
1016                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1017                         continue;
1018
1019                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1020                                                 fio_server_op(cmd->cmd.opcode));
1021                 flist_del(&cmd->list);
1022                 free(cmd);
1023                 ret = 1;
1024         }
1025
1026         return flist_empty(&client->cmd_list) && ret;
1027 }
1028
1029 static int fio_check_clients_timed_out(void)
1030 {
1031         struct fio_client *client;
1032         struct flist_head *entry, *tmp;
1033         struct timeval tv;
1034         int ret = 0;
1035
1036         gettimeofday(&tv, NULL);
1037
1038         flist_for_each_safe(entry, tmp, &client_list) {
1039                 client = flist_entry(entry, struct fio_client, list);
1040
1041                 if (flist_empty(&client->cmd_list))
1042                         continue;
1043
1044                 if (!client_check_cmd_timeout(client, &tv))
1045                         continue;
1046
1047                 if (client->ops->timed_out)
1048                         client->ops->timed_out(client);
1049                 else
1050                         log_err("fio: client %s timed out\n", client->hostname);
1051
1052                 remove_client(client);
1053                 ret = 1;
1054         }
1055
1056         return ret;
1057 }
1058
1059 int fio_handle_clients(struct client_ops *ops)
1060 {
1061         struct pollfd *pfds;
1062         int i, ret = 0, retval = 0;
1063
1064         gettimeofday(&eta_tv, NULL);
1065
1066         pfds = malloc(nr_clients * sizeof(struct pollfd));
1067
1068         sum_stat_clients = nr_clients;
1069         init_thread_stat(&client_ts);
1070         init_group_run_stat(&client_gs);
1071
1072         while (!exit_backend && nr_clients) {
1073                 struct flist_head *entry, *tmp;
1074                 struct fio_client *client;
1075
1076                 i = 0;
1077                 flist_for_each_safe(entry, tmp, &client_list) {
1078                         client = flist_entry(entry, struct fio_client, list);
1079
1080                         if (!client->sent_job && !client->ops->stay_connected &&
1081                             flist_empty(&client->cmd_list)) {
1082                                 remove_client(client);
1083                                 continue;
1084                         }
1085
1086                         pfds[i].fd = client->fd;
1087                         pfds[i].events = POLLIN;
1088                         i++;
1089                 }
1090
1091                 if (!nr_clients)
1092                         break;
1093
1094                 assert(i == nr_clients);
1095
1096                 do {
1097                         struct timeval tv;
1098
1099                         gettimeofday(&tv, NULL);
1100                         if (mtime_since(&eta_tv, &tv) >= 900) {
1101                                 request_client_etas(ops);
1102                                 memcpy(&eta_tv, &tv, sizeof(tv));
1103
1104                                 if (fio_check_clients_timed_out())
1105                                         break;
1106                         }
1107
1108                         ret = poll(pfds, nr_clients, 100);
1109                         if (ret < 0) {
1110                                 if (errno == EINTR)
1111                                         continue;
1112                                 log_err("fio: poll clients: %s\n", strerror(errno));
1113                                 break;
1114                         } else if (!ret)
1115                                 continue;
1116                 } while (ret <= 0);
1117
1118                 for (i = 0; i < nr_clients; i++) {
1119                         if (!(pfds[i].revents & POLLIN))
1120                                 continue;
1121
1122                         client = find_client_by_fd(pfds[i].fd);
1123                         if (!client) {
1124                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1125                                 continue;
1126                         }
1127                         if (!fio_handle_client(client)) {
1128                                 log_info("client: host=%s disconnected\n",
1129                                                 client->hostname);
1130                                 remove_client(client);
1131                                 retval = 1;
1132                         } else if (client->error)
1133                                 retval = 1;
1134                         put_client(client);
1135                 }
1136         }
1137
1138         free(pfds);
1139         return retval;
1140 }