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 fio_client_text_op(struct fio_client *client,
  25                 FILE *f, __u16 pdu_len, const char *buf)
  26 {
  27         const char *name;
  28         int fio_unused ret;
  29
  30         name = client->name ? client->name : client->hostname;
  31
  32         if (!client->skip_newline)
  33                 fprintf(f, "<%s> ", name);
  34         ret = fwrite(buf, pdu_len, 1, f);
  35         fflush(f);
  36         client->skip_newline = strchr(buf, '\n') == NULL;
  37 }
  38
  39 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  40 static void handle_ts(struct fio_net_cmd *cmd);
  41 static void handle_gs(struct fio_net_cmd *cmd);
  42 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd);
  43 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  44
  45 struct client_ops fio_client_ops = {
  46         .text_op        = fio_client_text_op,
  47         .disk_util      = handle_du,
  48         .thread_status  = handle_ts,
  49         .group_stats    = handle_gs,
  50         .eta            = handle_eta,
  51         .probe          = handle_probe,
  52 };
  53
  54 static struct timeval eta_tv;
  55
  56 enum {
  57         Client_created          = 0,
  58         Client_connected        = 1,
  59         Client_started          = 2,
  60         Client_running          = 3,
  61         Client_stopped          = 4,
  62         Client_exited           = 5,
  63 };
  64
  65 static FLIST_HEAD(client_list);
  66 static FLIST_HEAD(eta_list);
  67
  68 static FLIST_HEAD(arg_list);
  69
  70 static struct thread_stat client_ts;
  71 static struct group_run_stats client_gs;
  72 static int sum_stat_clients;
  73 static int sum_stat_nr;
  74
  75 #define FIO_CLIENT_HASH_BITS    7
  76 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  77 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  78 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  79
  80 static void fio_client_add_hash(struct fio_client *client)
  81 {
  82         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  83
  84         bucket &= FIO_CLIENT_HASH_MASK;
  85         flist_add(&client->hash_list, &client_hash[bucket]);
  86 }
  87
  88 static void fio_client_remove_hash(struct fio_client *client)
  89 {
  90         if (!flist_empty(&client->hash_list))
  91                 flist_del_init(&client->hash_list);
  92 }
  93
  94 static void fio_init fio_client_hash_init(void)
  95 {
  96         int i;
  97
  98         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  99                 INIT_FLIST_HEAD(&client_hash[i]);
 100 }
 101
 102 static struct fio_client *find_client_by_fd(int fd)
 103 {
 104         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 105         struct fio_client *client;
 106         struct flist_head *entry;
 107
 108         flist_for_each(entry, &client_hash[bucket]) {
 109                 client = flist_entry(entry, struct fio_client, hash_list);
 110
 111                 if (client->fd == fd)
 112                         return client;
 113         }
 114
 115         return NULL;
 116 }
 117
 118 static void remove_client(struct fio_client *client)
 119 {
 120         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 121         flist_del(&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, display_thread_status);
 128         }
 129
 130         free(client->hostname);
 131         if (client->argv)
 132                 free(client->argv);
 133         if (client->name)
 134                 free(client->name);
 135
 136         free(client);
 137         nr_clients--;
 138         sum_stat_clients--;
 139 }
 140
 141 static void __fio_client_add_cmd_option(struct fio_client *client,
 142                                         const char *opt)
 143 {
 144         int index;
 145
 146         index = client->argc++;
 147         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 148         client->argv[index] = strdup(opt);
 149         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 150 }
 151
 152 void fio_client_add_cmd_option(void *cookie, const char *opt)
 153 {
 154         struct fio_client *client = cookie;
 155         struct flist_head *entry;
 156
 157         if (!client || !opt)
 158                 return;
 159
 160         __fio_client_add_cmd_option(client, opt);
 161
 162         /*
 163          * Duplicate arguments to shared client group
 164          */
 165         flist_for_each(entry, &arg_list) {
 166                 client = flist_entry(entry, struct fio_client, arg_list);
 167
 168                 __fio_client_add_cmd_option(client, opt);
 169         }
 170 }
 171
 172 int fio_client_add(const char *hostname, void **cookie)
 173 {
 174         struct fio_client *existing = *cookie;
 175         struct fio_client *client;
 176
 177         if (existing) {
 178                 /*
 179                  * We always add our "exec" name as the option, hence 1
 180                  * means empty.
 181                  */
 182                 if (existing->argc == 1)
 183                         flist_add_tail(&existing->arg_list, &arg_list);
 184                 else {
 185                         while (!flist_empty(&arg_list))
 186                                 flist_del_init(arg_list.next);
 187                 }
 188         }
 189
 190         client = malloc(sizeof(*client));
 191         memset(client, 0, sizeof(*client));
 192
 193         INIT_FLIST_HEAD(&client->list);
 194         INIT_FLIST_HEAD(&client->hash_list);
 195         INIT_FLIST_HEAD(&client->arg_list);
 196         INIT_FLIST_HEAD(&client->eta_list);
 197         INIT_FLIST_HEAD(&client->cmd_list);
 198
 199         if (fio_server_parse_string(hostname, &client->hostname,
 200                                         &client->is_sock, &client->port,
 201                                         &client->addr.sin_addr,
 202                                         &client->addr6.sin6_addr,
 203                                         &client->ipv6))
 204                 return -1;
 205
 206         client->fd = -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         *cookie = client;
 214         return 0;
 215 }
 216
 217 static int fio_client_connect_ip(struct fio_client *client)
 218 {
 219         struct sockaddr *addr;
 220         fio_socklen_t socklen;
 221         int fd, domain;
 222
 223         if (client->ipv6) {
 224                 client->addr6.sin6_family = AF_INET6;
 225                 client->addr6.sin6_port = htons(client->port);
 226                 domain = AF_INET6;
 227                 addr = (struct sockaddr *) &client->addr6;
 228                 socklen = sizeof(client->addr6);
 229         } else {
 230                 client->addr.sin_family = AF_INET;
 231                 client->addr.sin_port = htons(client->port);
 232                 domain = AF_INET;
 233                 addr = (struct sockaddr *) &client->addr;
 234                 socklen = sizeof(client->addr);
 235         }
 236
 237         fd = socket(domain, SOCK_STREAM, 0);
 238         if (fd < 0) {
 239                 log_err("fio: socket: %s\n", strerror(errno));
 240                 return -1;
 241         }
 242
 243         if (connect(fd, addr, socklen) < 0) {
 244                 log_err("fio: connect: %s\n", strerror(errno));
 245                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 246                                                                 client->port);
 247                 close(fd);
 248                 return -1;
 249         }
 250
 251         return fd;
 252 }
 253
 254 static int fio_client_connect_sock(struct fio_client *client)
 255 {
 256         struct sockaddr_un *addr = &client->addr_un;
 257         fio_socklen_t len;
 258         int fd;
 259
 260         memset(addr, 0, sizeof(*addr));
 261         addr->sun_family = AF_UNIX;
 262         strcpy(addr->sun_path, client->hostname);
 263
 264         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 265         if (fd < 0) {
 266                 log_err("fio: socket: %s\n", strerror(errno));
 267                 return -1;
 268         }
 269
 270         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 271         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 272                 log_err("fio: connect; %s\n", strerror(errno));
 273                 close(fd);
 274                 return -1;
 275         }
 276
 277         return fd;
 278 }
 279
 280 static int fio_client_connect(struct fio_client *client)
 281 {
 282         int fd;
 283
 284         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 285
 286         if (client->is_sock)
 287                 fd = fio_client_connect_sock(client);
 288         else
 289                 fd = fio_client_connect_ip(client);
 290
 291         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 292
 293         if (fd < 0)
 294                 return 1;
 295
 296         client->fd = fd;
 297         fio_client_add_hash(client);
 298         client->state = Client_connected;
 299         return 0;
 300 }
 301
 302 void fio_clients_terminate(void)
 303 {
 304         struct flist_head *entry;
 305         struct fio_client *client;
 306
 307         dprint(FD_NET, "client: terminate clients\n");
 308
 309         flist_for_each(entry, &client_list) {
 310                 client = flist_entry(entry, struct fio_client, list);
 311
 312                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 313         }
 314 }
 315
 316 static void sig_int(int sig)
 317 {
 318         dprint(FD_NET, "client: got signal %d\n", sig);
 319         fio_clients_terminate();
 320 }
 321
 322 static void client_signal_handler(void)
 323 {
 324         struct sigaction act;
 325
 326         memset(&act, 0, sizeof(act));
 327         act.sa_handler = sig_int;
 328         act.sa_flags = SA_RESTART;
 329         sigaction(SIGINT, &act, NULL);
 330
 331         memset(&act, 0, sizeof(act));
 332         act.sa_handler = sig_int;
 333         act.sa_flags = SA_RESTART;
 334         sigaction(SIGTERM, &act, NULL);
 335 }
 336
 337 static void probe_client(struct fio_client *client)
 338 {
 339         dprint(FD_NET, "client: send probe\n");
 340
 341         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 342 }
 343
 344 static int send_client_cmd_line(struct fio_client *client)
 345 {
 346         struct cmd_single_line_pdu *cslp;
 347         struct cmd_line_pdu *clp;
 348         unsigned long offset;
 349         unsigned int *lens;
 350         void *pdu;
 351         size_t mem;
 352         int i, ret;
 353
 354         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 355
 356         lens = malloc(client->argc * sizeof(unsigned int));
 357
 358         /*
 359          * Find out how much mem we need
 360          */
 361         for (i = 0, mem = 0; i < client->argc; i++) {
 362                 lens[i] = strlen(client->argv[i]) + 1;
 363                 mem += lens[i];
 364         }
 365
 366         /*
 367          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 368          */
 369         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 370
 371         pdu = malloc(mem);
 372         clp = pdu;
 373         offset = sizeof(*clp);
 374
 375         for (i = 0; i < client->argc; i++) {
 376                 uint16_t arg_len = lens[i];
 377
 378                 cslp = pdu + offset;
 379                 strcpy((char *) cslp->text, client->argv[i]);
 380                 cslp->len = cpu_to_le16(arg_len);
 381                 offset += sizeof(*cslp) + arg_len;
 382         }
 383
 384         free(lens);
 385         clp->lines = cpu_to_le16(client->argc);
 386         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 387         free(pdu);
 388         return ret;
 389 }
 390
 391 int fio_clients_connect(void)
 392 {
 393         struct fio_client *client;
 394         struct flist_head *entry, *tmp;
 395         int ret;
 396
 397 #ifdef WIN32
 398         WSADATA wsd;
 399         WSAStartup(MAKEWORD(2,2), &wsd);
 400 #endif
 401
 402         dprint(FD_NET, "client: connect all\n");
 403
 404         client_signal_handler();
 405
 406         flist_for_each_safe(entry, tmp, &client_list) {
 407                 client = flist_entry(entry, struct fio_client, list);
 408
 409                 ret = fio_client_connect(client);
 410                 if (ret) {
 411                         remove_client(client);
 412                         continue;
 413                 }
 414
 415                 probe_client(client);
 416
 417                 if (client->argc > 1)
 418                         send_client_cmd_line(client);
 419         }
 420
 421         return !nr_clients;
 422 }
 423
 424 /*
 425  * Send file contents to server backend. We could use sendfile(), but to remain
 426  * more portable lets just read/write the darn thing.
 427  */
 428 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 429 {
 430         struct stat sb;
 431         char *p, *buf;
 432         off_t len;
 433         int fd, ret;
 434
 435         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 436
 437         fd = open(filename, O_RDONLY);
 438         if (fd < 0) {
 439                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 440                 return 1;
 441         }
 442
 443         if (fstat(fd, &sb) < 0) {
 444                 log_err("fio: job file stat: %s\n", strerror(errno));
 445                 close(fd);
 446                 return 1;
 447         }
 448
 449         buf = malloc(sb.st_size);
 450
 451         len = sb.st_size;
 452         p = buf;
 453         do {
 454                 ret = read(fd, p, len);
 455                 if (ret > 0) {
 456                         len -= ret;
 457                         if (!len)
 458                                 break;
 459                         p += ret;
 460                         continue;
 461                 } else if (!ret)
 462                         break;
 463                 else if (errno == EAGAIN || errno == EINTR)
 464                         continue;
 465         } while (1);
 466
 467         if (len) {
 468                 log_err("fio: failed reading job file %s\n", filename);
 469                 close(fd);
 470                 free(buf);
 471                 return 1;
 472         }
 473
 474         client->sent_job = 1;
 475         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 476         free(buf);
 477         close(fd);
 478         return ret;
 479 }
 480
 481 int fio_clients_send_ini(const char *filename)
 482 {
 483         struct fio_client *client;
 484         struct flist_head *entry, *tmp;
 485
 486         flist_for_each_safe(entry, tmp, &client_list) {
 487                 client = flist_entry(entry, struct fio_client, list);
 488
 489                 if (fio_client_send_ini(client, filename))
 490                         remove_client(client);
 491
 492                 client->sent_job = 1;
 493         }
 494
 495         return !nr_clients;
 496 }
 497
 498 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 499 {
 500         dst->max_val    = le64_to_cpu(src->max_val);
 501         dst->min_val    = le64_to_cpu(src->min_val);
 502         dst->samples    = le64_to_cpu(src->samples);
 503
 504         /*
 505          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 506          */
 507         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 508         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 509 }
 510
 511 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 512 {
 513         int i, j;
 514
 515         dst->error      = le32_to_cpu(src->error);
 516         dst->groupid    = le32_to_cpu(src->groupid);
 517         dst->pid        = le32_to_cpu(src->pid);
 518         dst->members    = le32_to_cpu(src->members);
 519
 520         for (i = 0; i < 2; i++) {
 521                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 522                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 523                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 524                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 525         }
 526
 527         dst->usr_time           = le64_to_cpu(src->usr_time);
 528         dst->sys_time           = le64_to_cpu(src->sys_time);
 529         dst->ctx                = le64_to_cpu(src->ctx);
 530         dst->minf               = le64_to_cpu(src->minf);
 531         dst->majf               = le64_to_cpu(src->majf);
 532         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 533
 534         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 535                 fio_fp64_t *fps = &src->percentile_list[i];
 536                 fio_fp64_t *fpd = &dst->percentile_list[i];
 537
 538                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 539         }
 540
 541         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 542                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 543                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 544                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 545         }
 546
 547         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 548                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 549                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 550         }
 551
 552         for (i = 0; i < 2; i++)
 553                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 554                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 555
 556         for (i = 0; i < 3; i++) {
 557                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 558                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 559         }
 560
 561         dst->total_submit       = le64_to_cpu(src->total_submit);
 562         dst->total_complete     = le64_to_cpu(src->total_complete);
 563
 564         for (i = 0; i < 2; i++) {
 565                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 566                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 567         }
 568
 569         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 570         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 571         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 572         dst->first_error        = le32_to_cpu(src->first_error);
 573         dst->kb_base            = le32_to_cpu(src->kb_base);
 574 }
 575
 576 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 577 {
 578         int i;
 579
 580         for (i = 0; i < 2; i++) {
 581                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 582                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 583                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 584                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 585                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 586                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 587         }
 588
 589         dst->kb_base    = le32_to_cpu(src->kb_base);
 590         dst->groupid    = le32_to_cpu(src->groupid);
 591 }
 592
 593 static void handle_ts(struct fio_net_cmd *cmd)
 594 {
 595         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 596
 597         convert_ts(&p->ts, &p->ts);
 598         convert_gs(&p->rs, &p->rs);
 599
 600         show_thread_status(&p->ts, &p->rs);
 601
 602         if (sum_stat_clients == 1)
 603                 return;
 604
 605         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 606         sum_group_stats(&client_gs, &p->rs);
 607
 608         client_ts.members++;
 609         client_ts.groupid = p->ts.groupid;
 610
 611         if (++sum_stat_nr == sum_stat_clients) {
 612                 strcpy(client_ts.name, "All clients");
 613                 show_thread_status(&client_ts, &client_gs);
 614         }
 615 }
 616
 617 static void handle_gs(struct fio_net_cmd *cmd)
 618 {
 619         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 620
 621         convert_gs(gs, gs);
 622         show_group_stats(gs);
 623 }
 624
 625 static void convert_agg(struct disk_util_agg *agg)
 626 {
 627         int i;
 628
 629         for (i = 0; i < 2; i++) {
 630                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 631                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 632                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 633                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 634         }
 635
 636         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 637         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 638         agg->slavecount         = le32_to_cpu(agg->slavecount);
 639         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 640 }
 641
 642 static void convert_dus(struct disk_util_stat *dus)
 643 {
 644         int i;
 645
 646         for (i = 0; i < 2; i++) {
 647                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 648                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 649                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 650                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 651         }
 652
 653         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 654         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 655         dus->msec               = le64_to_cpu(dus->msec);
 656 }
 657
 658 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 659 {
 660         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 661
 662         convert_dus(&du->dus);
 663         convert_agg(&du->agg);
 664
 665         if (!client->disk_stats_shown) {
 666                 client->disk_stats_shown = 1;
 667                 log_info("\nDisk stats (read/write):\n");
 668         }
 669
 670         print_disk_util(&du->dus, &du->agg, terse_output);
 671 }
 672
 673 void fio_client_convert_jobs_eta(struct jobs_eta *je)
 674 {
 675         int i;
 676
 677         je->nr_running          = le32_to_cpu(je->nr_running);
 678         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 679         je->nr_pending          = le32_to_cpu(je->nr_pending);
 680         je->files_open          = le32_to_cpu(je->files_open);
 681
 682         for (i = 0; i < 2; i++) {
 683                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 684                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 685                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 686                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 687                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 688                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 689         }
 690
 691         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 692         je->eta_sec             = le64_to_cpu(je->eta_sec);
 693 }
 694
 695 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 696 {
 697         int i;
 698
 699         dst->nr_running         += je->nr_running;
 700         dst->nr_ramp            += je->nr_ramp;
 701         dst->nr_pending         += je->nr_pending;
 702         dst->files_open         += je->files_open;
 703
 704         for (i = 0; i < 2; i++) {
 705                 dst->m_rate[i]  += je->m_rate[i];
 706                 dst->t_rate[i]  += je->t_rate[i];
 707                 dst->m_iops[i]  += je->m_iops[i];
 708                 dst->t_iops[i]  += je->t_iops[i];
 709                 dst->rate[i]    += je->rate[i];
 710                 dst->iops[i]    += je->iops[i];
 711         }
 712
 713         dst->elapsed_sec        += je->elapsed_sec;
 714
 715         if (je->eta_sec > dst->eta_sec)
 716                 dst->eta_sec = je->eta_sec;
 717 }
 718
 719 void fio_client_dec_jobs_eta(struct client_eta *eta, void (*fn)(struct jobs_eta *))
 720 {
 721         if (!--eta->pending) {
 722                 fn(&eta->eta);
 723                 free(eta);
 724         }
 725 }
 726
 727 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 728 {
 729         struct fio_net_int_cmd *icmd = NULL;
 730         struct flist_head *entry;
 731
 732         flist_for_each(entry, &client->cmd_list) {
 733                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 734
 735                 if (cmd->tag == (uintptr_t) icmd)
 736                         break;
 737
 738                 icmd = NULL;
 739         }
 740
 741         if (!icmd) {
 742                 log_err("fio: client: unable to find matching tag\n");
 743                 return;
 744         }
 745
 746         flist_del(&icmd->list);
 747         cmd->tag = icmd->saved_tag;
 748         free(icmd);
 749 }
 750
 751 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 752 {
 753         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 754         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 755
 756         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 757
 758         assert(client->eta_in_flight == eta);
 759
 760         client->eta_in_flight = NULL;
 761         flist_del_init(&client->eta_list);
 762
 763         fio_client_convert_jobs_eta(je);
 764         fio_client_sum_jobs_eta(&eta->eta, je);
 765         fio_client_dec_jobs_eta(eta, display_thread_status);
 766 }
 767
 768 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 769 {
 770         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 771         const char *os, *arch;
 772         char bit[16];
 773
 774         os = fio_get_os_string(probe->os);
 775         if (!os)
 776                 os = "unknown";
 777
 778         arch = fio_get_arch_string(probe->arch);
 779         if (!arch)
 780                 os = "unknown";
 781
 782         sprintf(bit, "%d-bit", probe->bpp * 8);
 783
 784         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 785                 probe->hostname, probe->bigendian, bit, os, arch,
 786                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 787
 788         if (!client->name)
 789                 client->name = strdup((char *) probe->hostname);
 790 }
 791
 792 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 793 {
 794         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 795
 796         client->state = Client_started;
 797         client->jobs = le32_to_cpu(pdu->jobs);
 798 }
 799
 800 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 801 {
 802         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 803
 804         client->state = Client_stopped;
 805         client->error = le32_to_cpu(pdu->error);
 806
 807         if (client->error)
 808                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 809 }
 810
 811 int fio_handle_client(struct fio_client *client, struct client_ops *ops)
 812 {
 813         struct fio_net_cmd *cmd;
 814
 815         dprint(FD_NET, "client: handle %s\n", client->hostname);
 816
 817         cmd = fio_net_recv_cmd(client->fd);
 818         if (!cmd)
 819                 return 0;
 820
 821         dprint(FD_NET, "client: got cmd op %s from %s\n",
 822                                 fio_server_op(cmd->opcode), client->hostname);
 823
 824         switch (cmd->opcode) {
 825         case FIO_NET_CMD_QUIT:
 826                 remove_client(client);
 827                 free(cmd);
 828                 break;
 829         case FIO_NET_CMD_TEXT: {
 830                 const char *buf = (const char *) cmd->payload;
 831                 ops->text_op(client, f_out, cmd->pdu_len, buf);
 832                 free(cmd);
 833                 break;
 834                 }
 835         case FIO_NET_CMD_DU:
 836                 ops->disk_util(client, cmd);
 837                 free(cmd);
 838                 break;
 839         case FIO_NET_CMD_TS:
 840                 ops->thread_status(cmd);
 841                 free(cmd);
 842                 break;
 843         case FIO_NET_CMD_GS:
 844                 ops->group_stats(cmd);
 845                 free(cmd);
 846                 break;
 847         case FIO_NET_CMD_ETA:
 848                 remove_reply_cmd(client, cmd);
 849                 ops->eta(client, cmd);
 850                 free(cmd);
 851                 break;
 852         case FIO_NET_CMD_PROBE:
 853                 remove_reply_cmd(client, cmd);
 854                 ops->probe(client, cmd);
 855                 free(cmd);
 856                 break;
 857         case FIO_NET_CMD_RUN:
 858                 client->state = Client_running;
 859                 free(cmd);
 860                 break;
 861         case FIO_NET_CMD_START:
 862                 handle_start(client, cmd);
 863                 free(cmd);
 864                 break;
 865         case FIO_NET_CMD_STOP:
 866                 handle_stop(client, cmd);
 867                 free(cmd);
 868                 break;
 869         default:
 870                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
 871                 free(cmd);
 872                 break;
 873         }
 874
 875         return 1;
 876 }
 877
 878 static void request_client_etas(void)
 879 {
 880         struct fio_client *client;
 881         struct flist_head *entry;
 882         struct client_eta *eta;
 883         int skipped = 0;
 884
 885         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
 886
 887         eta = malloc(sizeof(*eta));
 888         memset(&eta->eta, 0, sizeof(eta->eta));
 889         eta->pending = nr_clients;
 890
 891         flist_for_each(entry, &client_list) {
 892                 client = flist_entry(entry, struct fio_client, list);
 893
 894                 if (!flist_empty(&client->eta_list)) {
 895                         skipped++;
 896                         continue;
 897                 }
 898                 if (client->state != Client_running)
 899                         continue;
 900
 901                 assert(!client->eta_in_flight);
 902                 flist_add_tail(&client->eta_list, &eta_list);
 903                 client->eta_in_flight = eta;
 904                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
 905                                         (uintptr_t) eta, &client->cmd_list);
 906         }
 907
 908         while (skipped--)
 909                 fio_client_dec_jobs_eta(eta, display_thread_status);
 910
 911         dprint(FD_NET, "client: requested eta tag %p\n", eta);
 912 }
 913
 914 static int client_check_cmd_timeout(struct fio_client *client,
 915                                     struct timeval *now)
 916 {
 917         struct fio_net_int_cmd *cmd;
 918         struct flist_head *entry, *tmp;
 919         int ret = 0;
 920
 921         flist_for_each_safe(entry, tmp, &client->cmd_list) {
 922                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
 923
 924                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
 925                         continue;
 926
 927                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
 928                                                 fio_server_op(cmd->cmd.opcode));
 929                 flist_del(&cmd->list);
 930                 free(cmd);
 931                 ret = 1;
 932         }
 933
 934         return flist_empty(&client->cmd_list) && ret;
 935 }
 936
 937 static int fio_client_timed_out(void)
 938 {
 939         struct fio_client *client;
 940         struct flist_head *entry, *tmp;
 941         struct timeval tv;
 942         int ret = 0;
 943
 944         gettimeofday(&tv, NULL);
 945
 946         flist_for_each_safe(entry, tmp, &client_list) {
 947                 client = flist_entry(entry, struct fio_client, list);
 948
 949                 if (flist_empty(&client->cmd_list))
 950                         continue;
 951
 952                 if (!client_check_cmd_timeout(client, &tv))
 953                         continue;
 954
 955                 log_err("fio: client %s timed out\n", client->hostname);
 956                 remove_client(client);
 957                 ret = 1;
 958         }
 959
 960         return ret;
 961 }
 962
 963 int fio_handle_clients(struct client_ops *ops)
 964 {
 965         struct pollfd *pfds;
 966         int i, ret = 0, retval = 0;
 967
 968         gettimeofday(&eta_tv, NULL);
 969
 970         pfds = malloc(nr_clients * sizeof(struct pollfd));
 971
 972         sum_stat_clients = nr_clients;
 973         init_thread_stat(&client_ts);
 974         init_group_run_stat(&client_gs);
 975
 976         while (!exit_backend && nr_clients) {
 977                 struct flist_head *entry, *tmp;
 978                 struct fio_client *client;
 979
 980                 i = 0;
 981                 flist_for_each_safe(entry, tmp, &client_list) {
 982                         client = flist_entry(entry, struct fio_client, list);
 983
 984                         if (!client->sent_job &&
 985                             flist_empty(&client->cmd_list)) {
 986                                 remove_client(client);
 987                                 continue;
 988                         }
 989
 990                         pfds[i].fd = client->fd;
 991                         pfds[i].events = POLLIN;
 992                         i++;
 993                 }
 994
 995                 if (!nr_clients)
 996                         break;
 997
 998                 assert(i == nr_clients);
 999
1000                 do {
1001                         struct timeval tv;
1002
1003                         gettimeofday(&tv, NULL);
1004                         if (mtime_since(&eta_tv, &tv) >= 900) {
1005                                 request_client_etas();
1006                                 memcpy(&eta_tv, &tv, sizeof(tv));
1007
1008                                 if (fio_client_timed_out())
1009                                         break;
1010                         }
1011
1012                         ret = poll(pfds, nr_clients, 100);
1013                         if (ret < 0) {
1014                                 if (errno == EINTR)
1015                                         continue;
1016                                 log_err("fio: poll clients: %s\n", strerror(errno));
1017                                 break;
1018                         } else if (!ret)
1019                                 continue;
1020                 } while (ret <= 0);
1021
1022                 for (i = 0; i < nr_clients; i++) {
1023                         if (!(pfds[i].revents & POLLIN))
1024                                 continue;
1025
1026                         client = find_client_by_fd(pfds[i].fd);
1027                         if (!client) {
1028                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1029                                 continue;
1030                         }
1031                         if (!fio_handle_client(client, ops)) {
1032                                 log_info("client: host=%s disconnected\n",
1033                                                 client->hostname);
1034                                 remove_client(client);
1035                                 retval = 1;
1036                         } else if (client->error)
1037                                 retval = 1;
1038                 }
1039         }
1040
1041         free(pfds);
1042         return retval;
1043 }