client.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <limits.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <sys/poll.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <sys/wait.h>
  11 #include <sys/socket.h>
  12 #include <sys/un.h>
  13 #include <netinet/in.h>
  14 #include <arpa/inet.h>
  15 #include <netdb.h>
  16 #include <signal.h>
  17
  18 #include "fio.h"
  19 #include "client.h"
  20 #include "server.h"
  21 #include "flist.h"
  22 #include "hash.h"
  23
  24 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  25 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  26 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  30
  31 struct client_ops fio_client_ops = {
  32         .text_op        = handle_text,
  33         .disk_util      = handle_du,
  34         .thread_status  = handle_ts,
  35         .group_stats    = handle_gs,
  36         .stop           = handle_stop,
  37         .eta            = display_thread_status,
  38         .probe          = handle_probe,
  39 };
  40
  41 static struct timeval eta_tv;
  42
  43 static FLIST_HEAD(client_list);
  44 static FLIST_HEAD(eta_list);
  45
  46 static FLIST_HEAD(arg_list);
  47
  48 struct thread_stat client_ts;
  49 struct group_run_stats client_gs;
  50 int sum_stat_clients;
  51
  52 static int sum_stat_nr;
  53
  54 #define FIO_CLIENT_HASH_BITS    7
  55 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  56 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  57 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  58
  59 static void fio_client_add_hash(struct fio_client *client)
  60 {
  61         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  62
  63         bucket &= FIO_CLIENT_HASH_MASK;
  64         flist_add(&client->hash_list, &client_hash[bucket]);
  65 }
  66
  67 static void fio_client_remove_hash(struct fio_client *client)
  68 {
  69         if (!flist_empty(&client->hash_list))
  70                 flist_del_init(&client->hash_list);
  71 }
  72
  73 static void fio_init fio_client_hash_init(void)
  74 {
  75         int i;
  76
  77         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  78                 INIT_FLIST_HEAD(&client_hash[i]);
  79 }
  80
  81 static struct fio_client *find_client_by_fd(int fd)
  82 {
  83         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  84         struct fio_client *client;
  85         struct flist_head *entry;
  86
  87         flist_for_each(entry, &client_hash[bucket]) {
  88                 client = flist_entry(entry, struct fio_client, hash_list);
  89
  90                 if (client->fd == fd)
  91                         return fio_get_client(client);
  92         }
  93
  94         return NULL;
  95 }
  96
  97 static void remove_client(struct fio_client *client)
  98 {
  99         assert(client->refs);
 100
 101         if (--client->refs)
 102                 return;
 103
 104         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 105         flist_del(&client->list);
 106
 107         fio_client_remove_hash(client);
 108
 109         if (!flist_empty(&client->eta_list)) {
 110                 flist_del_init(&client->eta_list);
 111                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 112         }
 113
 114         free(client->hostname);
 115         if (client->argv)
 116                 free(client->argv);
 117         if (client->name)
 118                 free(client->name);
 119
 120         free(client);
 121         nr_clients--;
 122         sum_stat_clients--;
 123 }
 124
 125 void fio_put_client(struct fio_client *client)
 126 {
 127         remove_client(client);
 128 }
 129
 130 struct fio_client *fio_get_client(struct fio_client *client)
 131 {
 132         client->refs++;
 133         return client;
 134 }
 135
 136 static void __fio_client_add_cmd_option(struct fio_client *client,
 137                                         const char *opt)
 138 {
 139         int index;
 140
 141         index = client->argc++;
 142         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 143         client->argv[index] = strdup(opt);
 144         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 145 }
 146
 147 void fio_client_add_cmd_option(void *cookie, const char *opt)
 148 {
 149         struct fio_client *client = cookie;
 150         struct flist_head *entry;
 151
 152         if (!client || !opt)
 153                 return;
 154
 155         __fio_client_add_cmd_option(client, opt);
 156
 157         /*
 158          * Duplicate arguments to shared client group
 159          */
 160         flist_for_each(entry, &arg_list) {
 161                 client = flist_entry(entry, struct fio_client, arg_list);
 162
 163                 __fio_client_add_cmd_option(client, opt);
 164         }
 165 }
 166
 167 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 168                                            const char *hostname, int type,
 169                                            int port)
 170 {
 171         struct fio_client *client;
 172
 173         client = malloc(sizeof(*client));
 174         memset(client, 0, sizeof(*client));
 175
 176         INIT_FLIST_HEAD(&client->list);
 177         INIT_FLIST_HEAD(&client->hash_list);
 178         INIT_FLIST_HEAD(&client->arg_list);
 179         INIT_FLIST_HEAD(&client->eta_list);
 180         INIT_FLIST_HEAD(&client->cmd_list);
 181
 182         client->hostname = strdup(hostname);
 183
 184         if (type == Fio_client_socket)
 185                 client->is_sock = 1;
 186         else {
 187                 int ipv6;
 188
 189                 ipv6 = type == Fio_client_ipv6;
 190                 if (fio_server_parse_host(hostname, &ipv6,
 191                                                 &client->addr.sin_addr,
 192                                                 &client->addr6.sin6_addr))
 193                         goto err;
 194
 195                 client->port = port;
 196         }
 197
 198         client->fd = -1;
 199         client->ops = ops;
 200         client->refs = 1;
 201
 202         __fio_client_add_cmd_option(client, "fio");
 203
 204         flist_add(&client->list, &client_list);
 205         nr_clients++;
 206         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 207         return client;
 208 err:
 209         free(client);
 210         return NULL;
 211 }
 212
 213 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 214 {
 215         struct fio_client *existing = *cookie;
 216         struct fio_client *client;
 217
 218         if (existing) {
 219                 /*
 220                  * We always add our "exec" name as the option, hence 1
 221                  * means empty.
 222                  */
 223                 if (existing->argc == 1)
 224                         flist_add_tail(&existing->arg_list, &arg_list);
 225                 else {
 226                         while (!flist_empty(&arg_list))
 227                                 flist_del_init(arg_list.next);
 228                 }
 229         }
 230
 231         client = malloc(sizeof(*client));
 232         memset(client, 0, sizeof(*client));
 233
 234         INIT_FLIST_HEAD(&client->list);
 235         INIT_FLIST_HEAD(&client->hash_list);
 236         INIT_FLIST_HEAD(&client->arg_list);
 237         INIT_FLIST_HEAD(&client->eta_list);
 238         INIT_FLIST_HEAD(&client->cmd_list);
 239
 240         if (fio_server_parse_string(hostname, &client->hostname,
 241                                         &client->is_sock, &client->port,
 242                                         &client->addr.sin_addr,
 243                                         &client->addr6.sin6_addr,
 244                                         &client->ipv6))
 245                 return -1;
 246
 247         client->fd = -1;
 248         client->ops = ops;
 249         client->refs = 1;
 250
 251         __fio_client_add_cmd_option(client, "fio");
 252
 253         flist_add(&client->list, &client_list);
 254         nr_clients++;
 255         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 256         *cookie = client;
 257         return 0;
 258 }
 259
 260 static int fio_client_connect_ip(struct fio_client *client)
 261 {
 262         struct sockaddr *addr;
 263         fio_socklen_t socklen;
 264         int fd, domain;
 265
 266         if (client->ipv6) {
 267                 client->addr6.sin6_family = AF_INET6;
 268                 client->addr6.sin6_port = htons(client->port);
 269                 domain = AF_INET6;
 270                 addr = (struct sockaddr *) &client->addr6;
 271                 socklen = sizeof(client->addr6);
 272         } else {
 273                 client->addr.sin_family = AF_INET;
 274                 client->addr.sin_port = htons(client->port);
 275                 domain = AF_INET;
 276                 addr = (struct sockaddr *) &client->addr;
 277                 socklen = sizeof(client->addr);
 278         }
 279
 280         fd = socket(domain, SOCK_STREAM, 0);
 281         if (fd < 0) {
 282                 int ret = -errno;
 283
 284                 log_err("fio: socket: %s\n", strerror(errno));
 285                 return ret;
 286         }
 287
 288         if (connect(fd, addr, socklen) < 0) {
 289                 int ret = -errno;
 290
 291                 log_err("fio: connect: %s\n", strerror(errno));
 292                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 293                                                                 client->port);
 294                 close(fd);
 295                 return ret;
 296         }
 297
 298         return fd;
 299 }
 300
 301 static int fio_client_connect_sock(struct fio_client *client)
 302 {
 303         struct sockaddr_un *addr = &client->addr_un;
 304         fio_socklen_t len;
 305         int fd;
 306
 307         memset(addr, 0, sizeof(*addr));
 308         addr->sun_family = AF_UNIX;
 309         strcpy(addr->sun_path, client->hostname);
 310
 311         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 312         if (fd < 0) {
 313                 int ret = -errno;
 314
 315                 log_err("fio: socket: %s\n", strerror(errno));
 316                 return ret;
 317         }
 318
 319         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 320         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 321                 int ret = -errno;
 322
 323                 log_err("fio: connect; %s\n", strerror(errno));
 324                 close(fd);
 325                 return ret;
 326         }
 327
 328         return fd;
 329 }
 330
 331 int fio_client_connect(struct fio_client *client)
 332 {
 333         int fd;
 334
 335         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 336
 337         if (client->is_sock)
 338                 fd = fio_client_connect_sock(client);
 339         else
 340                 fd = fio_client_connect_ip(client);
 341
 342         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 343
 344         if (fd < 0)
 345                 return fd;
 346
 347         client->fd = fd;
 348         fio_client_add_hash(client);
 349         client->state = Client_connected;
 350         return 0;
 351 }
 352
 353 void fio_client_terminate(struct fio_client *client)
 354 {
 355         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 356 }
 357
 358 void fio_clients_terminate(void)
 359 {
 360         struct flist_head *entry;
 361         struct fio_client *client;
 362
 363         dprint(FD_NET, "client: terminate clients\n");
 364
 365         flist_for_each(entry, &client_list) {
 366                 client = flist_entry(entry, struct fio_client, list);
 367                 fio_client_terminate(client);
 368         }
 369 }
 370
 371 static void sig_int(int sig)
 372 {
 373         dprint(FD_NET, "client: got signal %d\n", sig);
 374         fio_clients_terminate();
 375 }
 376
 377 static void client_signal_handler(void)
 378 {
 379         struct sigaction act;
 380
 381         memset(&act, 0, sizeof(act));
 382         act.sa_handler = sig_int;
 383         act.sa_flags = SA_RESTART;
 384         sigaction(SIGINT, &act, NULL);
 385
 386         memset(&act, 0, sizeof(act));
 387         act.sa_handler = sig_int;
 388         act.sa_flags = SA_RESTART;
 389         sigaction(SIGTERM, &act, NULL);
 390 }
 391
 392 static void probe_client(struct fio_client *client)
 393 {
 394         dprint(FD_NET, "client: send probe\n");
 395
 396         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 397 }
 398
 399 static int send_client_cmd_line(struct fio_client *client)
 400 {
 401         struct cmd_single_line_pdu *cslp;
 402         struct cmd_line_pdu *clp;
 403         unsigned long offset;
 404         unsigned int *lens;
 405         void *pdu;
 406         size_t mem;
 407         int i, ret;
 408
 409         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 410
 411         lens = malloc(client->argc * sizeof(unsigned int));
 412
 413         /*
 414          * Find out how much mem we need
 415          */
 416         for (i = 0, mem = 0; i < client->argc; i++) {
 417                 lens[i] = strlen(client->argv[i]) + 1;
 418                 mem += lens[i];
 419         }
 420
 421         /*
 422          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 423          */
 424         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 425
 426         pdu = malloc(mem);
 427         clp = pdu;
 428         offset = sizeof(*clp);
 429
 430         for (i = 0; i < client->argc; i++) {
 431                 uint16_t arg_len = lens[i];
 432
 433                 cslp = pdu + offset;
 434                 strcpy((char *) cslp->text, client->argv[i]);
 435                 cslp->len = cpu_to_le16(arg_len);
 436                 offset += sizeof(*cslp) + arg_len;
 437         }
 438
 439         free(lens);
 440         clp->lines = cpu_to_le16(client->argc);
 441         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 442         free(pdu);
 443         return ret;
 444 }
 445
 446 int fio_clients_connect(void)
 447 {
 448         struct fio_client *client;
 449         struct flist_head *entry, *tmp;
 450         int ret;
 451
 452 #ifdef WIN32
 453         WSADATA wsd;
 454         WSAStartup(MAKEWORD(2,2), &wsd);
 455 #endif
 456
 457         dprint(FD_NET, "client: connect all\n");
 458
 459         client_signal_handler();
 460
 461         flist_for_each_safe(entry, tmp, &client_list) {
 462                 client = flist_entry(entry, struct fio_client, list);
 463
 464                 ret = fio_client_connect(client);
 465                 if (ret) {
 466                         remove_client(client);
 467                         continue;
 468                 }
 469
 470                 probe_client(client);
 471
 472                 if (client->argc > 1)
 473                         send_client_cmd_line(client);
 474         }
 475
 476         return !nr_clients;
 477 }
 478
 479 int fio_start_client(struct fio_client *client)
 480 {
 481         dprint(FD_NET, "client: start %s\n", client->hostname);
 482         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 483 }
 484
 485 int fio_start_all_clients(void)
 486 {
 487         struct fio_client *client;
 488         struct flist_head *entry, *tmp;
 489         int ret;
 490
 491         dprint(FD_NET, "client: start all\n");
 492
 493         flist_for_each_safe(entry, tmp, &client_list) {
 494                 client = flist_entry(entry, struct fio_client, list);
 495
 496                 ret = fio_start_client(client);
 497                 if (ret) {
 498                         remove_client(client);
 499                         continue;
 500                 }
 501         }
 502
 503         return flist_empty(&client_list);
 504 }
 505
 506 /*
 507  * Send file contents to server backend. We could use sendfile(), but to remain
 508  * more portable lets just read/write the darn thing.
 509  */
 510 static int __fio_client_send_ini(struct fio_client *client, const char *filename)
 511 {
 512         struct stat sb;
 513         char *p, *buf;
 514         off_t len;
 515         int fd, ret;
 516
 517         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 518
 519         fd = open(filename, O_RDONLY);
 520         if (fd < 0) {
 521                 int ret = -errno;
 522
 523                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 524                 return ret;
 525         }
 526
 527         if (fstat(fd, &sb) < 0) {
 528                 int ret = -errno;
 529
 530                 log_err("fio: job file stat: %s\n", strerror(errno));
 531                 close(fd);
 532                 return ret;
 533         }
 534
 535         buf = malloc(sb.st_size);
 536
 537         len = sb.st_size;
 538         p = buf;
 539         do {
 540                 ret = read(fd, p, len);
 541                 if (ret > 0) {
 542                         len -= ret;
 543                         if (!len)
 544                                 break;
 545                         p += ret;
 546                         continue;
 547                 } else if (!ret)
 548                         break;
 549                 else if (errno == EAGAIN || errno == EINTR)
 550                         continue;
 551         } while (1);
 552
 553         if (len) {
 554                 log_err("fio: failed reading job file %s\n", filename);
 555                 close(fd);
 556                 free(buf);
 557                 return 1;
 558         }
 559
 560         client->sent_job = 1;
 561         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 562         free(buf);
 563         close(fd);
 564         return ret;
 565 }
 566
 567 int fio_client_send_ini(struct fio_client *client, const char *filename)
 568 {
 569         int ret;
 570
 571         ret = __fio_client_send_ini(client, filename);
 572         if (ret) {
 573                 remove_client(client);
 574                 return ret;
 575         }
 576
 577         client->sent_job = 1;
 578         return ret;
 579 }
 580
 581 int fio_clients_send_ini(const char *filename)
 582 {
 583         struct fio_client *client;
 584         struct flist_head *entry, *tmp;
 585
 586         flist_for_each_safe(entry, tmp, &client_list) {
 587                 client = flist_entry(entry, struct fio_client, list);
 588
 589                 fio_client_send_ini(client, filename);
 590         }
 591
 592         return !nr_clients;
 593 }
 594
 595 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 596 {
 597         dst->max_val    = le64_to_cpu(src->max_val);
 598         dst->min_val    = le64_to_cpu(src->min_val);
 599         dst->samples    = le64_to_cpu(src->samples);
 600
 601         /*
 602          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 603          */
 604         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 605         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 606 }
 607
 608 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 609 {
 610         int i, j;
 611
 612         dst->error      = le32_to_cpu(src->error);
 613         dst->groupid    = le32_to_cpu(src->groupid);
 614         dst->pid        = le32_to_cpu(src->pid);
 615         dst->members    = le32_to_cpu(src->members);
 616
 617         for (i = 0; i < 2; i++) {
 618                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 619                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 620                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 621                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 622         }
 623
 624         dst->usr_time           = le64_to_cpu(src->usr_time);
 625         dst->sys_time           = le64_to_cpu(src->sys_time);
 626         dst->ctx                = le64_to_cpu(src->ctx);
 627         dst->minf               = le64_to_cpu(src->minf);
 628         dst->majf               = le64_to_cpu(src->majf);
 629         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 630
 631         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 632                 fio_fp64_t *fps = &src->percentile_list[i];
 633                 fio_fp64_t *fpd = &dst->percentile_list[i];
 634
 635                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 636         }
 637
 638         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 639                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 640                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 641                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 642         }
 643
 644         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 645                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 646                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 647         }
 648
 649         for (i = 0; i < 2; i++)
 650                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 651                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 652
 653         for (i = 0; i < 3; i++) {
 654                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 655                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 656         }
 657
 658         dst->total_submit       = le64_to_cpu(src->total_submit);
 659         dst->total_complete     = le64_to_cpu(src->total_complete);
 660
 661         for (i = 0; i < 2; i++) {
 662                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 663                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 664         }
 665
 666         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 667         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 668         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 669         dst->first_error        = le32_to_cpu(src->first_error);
 670         dst->kb_base            = le32_to_cpu(src->kb_base);
 671 }
 672
 673 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 674 {
 675         int i;
 676
 677         for (i = 0; i < 2; i++) {
 678                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 679                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 680                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 681                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 682                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 683                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 684         }
 685
 686         dst->kb_base    = le32_to_cpu(src->kb_base);
 687         dst->groupid    = le32_to_cpu(src->groupid);
 688 }
 689
 690 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 691 {
 692         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 693
 694         show_thread_status(&p->ts, &p->rs);
 695
 696         if (sum_stat_clients == 1)
 697                 return;
 698
 699         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 700         sum_group_stats(&client_gs, &p->rs);
 701
 702         client_ts.members++;
 703         client_ts.groupid = p->ts.groupid;
 704
 705         if (++sum_stat_nr == sum_stat_clients) {
 706                 strcpy(client_ts.name, "All clients");
 707                 show_thread_status(&client_ts, &client_gs);
 708         }
 709 }
 710
 711 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 712 {
 713         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 714
 715         show_group_stats(gs);
 716 }
 717
 718 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 719 {
 720         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 721         const char *buf = (const char *) pdu->buf;
 722         const char *name;
 723         int fio_unused ret;
 724
 725         name = client->name ? client->name : client->hostname;
 726
 727         if (!client->skip_newline)
 728                 fprintf(f_out, "<%s> ", name);
 729         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 730         fflush(f_out);
 731         client->skip_newline = strchr(buf, '\n') == NULL;
 732 }
 733
 734 static void convert_agg(struct disk_util_agg *agg)
 735 {
 736         int i;
 737
 738         for (i = 0; i < 2; i++) {
 739                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 740                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 741                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 742                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 743         }
 744
 745         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 746         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 747         agg->slavecount         = le32_to_cpu(agg->slavecount);
 748         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 749 }
 750
 751 static void convert_dus(struct disk_util_stat *dus)
 752 {
 753         int i;
 754
 755         for (i = 0; i < 2; i++) {
 756                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 757                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 758                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 759                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 760         }
 761
 762         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 763         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 764         dus->msec               = le64_to_cpu(dus->msec);
 765 }
 766
 767 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 768 {
 769         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 770
 771         if (!client->disk_stats_shown) {
 772                 client->disk_stats_shown = 1;
 773                 log_info("\nDisk stats (read/write):\n");
 774         }
 775
 776         print_disk_util(&du->dus, &du->agg, terse_output);
 777 }
 778
 779 static void convert_jobs_eta(struct jobs_eta *je)
 780 {
 781         int i;
 782
 783         je->nr_running          = le32_to_cpu(je->nr_running);
 784         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 785         je->nr_pending          = le32_to_cpu(je->nr_pending);
 786         je->files_open          = le32_to_cpu(je->files_open);
 787
 788         for (i = 0; i < 2; i++) {
 789                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 790                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 791                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 792                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 793                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 794                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 795         }
 796
 797         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 798         je->eta_sec             = le64_to_cpu(je->eta_sec);
 799         je->nr_threads          = le32_to_cpu(je->nr_threads);
 800 }
 801
 802 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 803 {
 804         int i;
 805
 806         dst->nr_running         += je->nr_running;
 807         dst->nr_ramp            += je->nr_ramp;
 808         dst->nr_pending         += je->nr_pending;
 809         dst->files_open         += je->files_open;
 810
 811         for (i = 0; i < 2; i++) {
 812                 dst->m_rate[i]  += je->m_rate[i];
 813                 dst->t_rate[i]  += je->t_rate[i];
 814                 dst->m_iops[i]  += je->m_iops[i];
 815                 dst->t_iops[i]  += je->t_iops[i];
 816                 dst->rate[i]    += je->rate[i];
 817                 dst->iops[i]    += je->iops[i];
 818         }
 819
 820         dst->elapsed_sec        += je->elapsed_sec;
 821
 822         if (je->eta_sec > dst->eta_sec)
 823                 dst->eta_sec = je->eta_sec;
 824
 825         dst->nr_threads         += je->nr_threads;
 826         /* we need to handle je->run_str too ... */
 827 }
 828
 829 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 830 {
 831         if (!--eta->pending) {
 832                 eta_fn(&eta->eta);
 833                 free(eta);
 834         }
 835 }
 836
 837 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 838 {
 839         struct fio_net_int_cmd *icmd = NULL;
 840         struct flist_head *entry;
 841
 842         flist_for_each(entry, &client->cmd_list) {
 843                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 844
 845                 if (cmd->tag == (uintptr_t) icmd)
 846                         break;
 847
 848                 icmd = NULL;
 849         }
 850
 851         if (!icmd) {
 852                 log_err("fio: client: unable to find matching tag\n");
 853                 return;
 854         }
 855
 856         flist_del(&icmd->list);
 857         cmd->tag = icmd->saved_tag;
 858         free(icmd);
 859 }
 860
 861 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 862 {
 863         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 864         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 865
 866         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 867
 868         assert(client->eta_in_flight == eta);
 869
 870         client->eta_in_flight = NULL;
 871         flist_del_init(&client->eta_list);
 872
 873         if (client->ops->jobs_eta)
 874                 client->ops->jobs_eta(client, je);
 875
 876         fio_client_sum_jobs_eta(&eta->eta, je);
 877         fio_client_dec_jobs_eta(eta, client->ops->eta);
 878 }
 879
 880 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 881 {
 882         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 883         const char *os, *arch;
 884         char bit[16];
 885
 886         os = fio_get_os_string(probe->os);
 887         if (!os)
 888                 os = "unknown";
 889
 890         arch = fio_get_arch_string(probe->arch);
 891         if (!arch)
 892                 os = "unknown";
 893
 894         sprintf(bit, "%d-bit", probe->bpp * 8);
 895
 896         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 897                 probe->hostname, probe->bigendian, bit, os, arch,
 898                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 899
 900         if (!client->name)
 901                 client->name = strdup((char *) probe->hostname);
 902 }
 903
 904 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 905 {
 906         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 907
 908         client->state = Client_started;
 909         client->jobs = le32_to_cpu(pdu->jobs);
 910 }
 911
 912 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 913 {
 914         if (client->error)
 915                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 916 }
 917
 918 static void convert_stop(struct fio_net_cmd *cmd)
 919 {
 920         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 921
 922         pdu->error = le32_to_cpu(pdu->error);
 923 }
 924
 925 static void convert_text(struct fio_net_cmd *cmd)
 926 {
 927         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 928
 929         pdu->level      = le32_to_cpu(pdu->level);
 930         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
 931         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
 932         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
 933 }
 934
 935 int fio_handle_client(struct fio_client *client)
 936 {
 937         struct client_ops *ops = client->ops;
 938         struct fio_net_cmd *cmd;
 939
 940         dprint(FD_NET, "client: handle %s\n", client->hostname);
 941
 942         cmd = fio_net_recv_cmd(client->fd);
 943         if (!cmd)
 944                 return 0;
 945
 946         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
 947                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
 948
 949         switch (cmd->opcode) {
 950         case FIO_NET_CMD_QUIT:
 951                 if (ops->quit)
 952                         ops->quit(client);
 953                 remove_client(client);
 954                 free(cmd);
 955                 break;
 956         case FIO_NET_CMD_TEXT:
 957                 convert_text(cmd);
 958                 ops->text_op(client, cmd);
 959                 free(cmd);
 960                 break;
 961         case FIO_NET_CMD_DU: {
 962                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 963
 964                 convert_dus(&du->dus);
 965                 convert_agg(&du->agg);
 966
 967                 ops->disk_util(client, cmd);
 968                 free(cmd);
 969                 break;
 970                 }
 971         case FIO_NET_CMD_TS: {
 972                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 973
 974                 convert_ts(&p->ts, &p->ts);
 975                 convert_gs(&p->rs, &p->rs);
 976
 977                 ops->thread_status(client, cmd);
 978                 free(cmd);
 979                 break;
 980                 }
 981         case FIO_NET_CMD_GS: {
 982                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 983
 984                 convert_gs(gs, gs);
 985
 986                 ops->group_stats(client, cmd);
 987                 free(cmd);
 988                 break;
 989                 }
 990         case FIO_NET_CMD_ETA: {
 991                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 992
 993                 remove_reply_cmd(client, cmd);
 994                 convert_jobs_eta(je);
 995                 handle_eta(client, cmd);
 996                 free(cmd);
 997                 break;
 998                 }
 999         case FIO_NET_CMD_PROBE:
1000                 remove_reply_cmd(client, cmd);
1001                 ops->probe(client, cmd);
1002                 free(cmd);
1003                 break;
1004         case FIO_NET_CMD_SERVER_START:
1005                 client->state = Client_running;
1006                 free(cmd);
1007                 break;
1008         case FIO_NET_CMD_START:
1009                 handle_start(client, cmd);
1010                 free(cmd);
1011                 break;
1012         case FIO_NET_CMD_STOP: {
1013                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1014
1015                 convert_stop(cmd);
1016                 client->state = Client_stopped;
1017                 client->error = pdu->error;
1018                 ops->stop(client, cmd);
1019                 free(cmd);
1020                 break;
1021                 }
1022         case FIO_NET_CMD_ADD_JOB:
1023                 if (ops->add_job)
1024                         ops->add_job(client, cmd);
1025                 free(cmd);
1026                 break;
1027         default:
1028                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1029                 free(cmd);
1030                 break;
1031         }
1032
1033         return 1;
1034 }
1035
1036 static void request_client_etas(struct client_ops *ops)
1037 {
1038         struct fio_client *client;
1039         struct flist_head *entry;
1040         struct client_eta *eta;
1041         int skipped = 0;
1042
1043         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1044
1045         eta = malloc(sizeof(*eta));
1046         memset(&eta->eta, 0, sizeof(eta->eta));
1047         eta->pending = nr_clients;
1048
1049         flist_for_each(entry, &client_list) {
1050                 client = flist_entry(entry, struct fio_client, list);
1051
1052                 if (!flist_empty(&client->eta_list)) {
1053                         skipped++;
1054                         continue;
1055                 }
1056                 if (client->state != Client_running)
1057                         continue;
1058
1059                 assert(!client->eta_in_flight);
1060                 flist_add_tail(&client->eta_list, &eta_list);
1061                 client->eta_in_flight = eta;
1062                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1063                                         (uintptr_t) eta, &client->cmd_list);
1064         }
1065
1066         while (skipped--)
1067                 fio_client_dec_jobs_eta(eta, ops->eta);
1068
1069         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1070 }
1071
1072 static int client_check_cmd_timeout(struct fio_client *client,
1073                                     struct timeval *now)
1074 {
1075         struct fio_net_int_cmd *cmd;
1076         struct flist_head *entry, *tmp;
1077         int ret = 0;
1078
1079         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1080                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
1081
1082                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1083                         continue;
1084
1085                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1086                                                 fio_server_op(cmd->cmd.opcode));
1087                 flist_del(&cmd->list);
1088                 free(cmd);
1089                 ret = 1;
1090         }
1091
1092         return flist_empty(&client->cmd_list) && ret;
1093 }
1094
1095 static int fio_check_clients_timed_out(void)
1096 {
1097         struct fio_client *client;
1098         struct flist_head *entry, *tmp;
1099         struct timeval tv;
1100         int ret = 0;
1101
1102         gettimeofday(&tv, NULL);
1103
1104         flist_for_each_safe(entry, tmp, &client_list) {
1105                 client = flist_entry(entry, struct fio_client, list);
1106
1107                 if (flist_empty(&client->cmd_list))
1108                         continue;
1109
1110                 if (!client_check_cmd_timeout(client, &tv))
1111                         continue;
1112
1113                 if (client->ops->timed_out)
1114                         client->ops->timed_out(client);
1115                 else
1116                         log_err("fio: client %s timed out\n", client->hostname);
1117
1118                 remove_client(client);
1119                 ret = 1;
1120         }
1121
1122         return ret;
1123 }
1124
1125 int fio_handle_clients(struct client_ops *ops)
1126 {
1127         struct pollfd *pfds;
1128         int i, ret = 0, retval = 0;
1129
1130         gettimeofday(&eta_tv, NULL);
1131
1132         pfds = malloc(nr_clients * sizeof(struct pollfd));
1133
1134         sum_stat_clients = nr_clients;
1135         init_thread_stat(&client_ts);
1136         init_group_run_stat(&client_gs);
1137
1138         while (!exit_backend && nr_clients) {
1139                 struct flist_head *entry, *tmp;
1140                 struct fio_client *client;
1141
1142                 i = 0;
1143                 flist_for_each_safe(entry, tmp, &client_list) {
1144                         client = flist_entry(entry, struct fio_client, list);
1145
1146                         if (!client->sent_job && !client->ops->stay_connected &&
1147                             flist_empty(&client->cmd_list)) {
1148                                 remove_client(client);
1149                                 continue;
1150                         }
1151
1152                         pfds[i].fd = client->fd;
1153                         pfds[i].events = POLLIN;
1154                         i++;
1155                 }
1156
1157                 if (!nr_clients)
1158                         break;
1159
1160                 assert(i == nr_clients);
1161
1162                 do {
1163                         struct timeval tv;
1164
1165                         gettimeofday(&tv, NULL);
1166                         if (mtime_since(&eta_tv, &tv) >= 900) {
1167                                 request_client_etas(ops);
1168                                 memcpy(&eta_tv, &tv, sizeof(tv));
1169
1170                                 if (fio_check_clients_timed_out())
1171                                         break;
1172                         }
1173
1174                         ret = poll(pfds, nr_clients, 100);
1175                         if (ret < 0) {
1176                                 if (errno == EINTR)
1177                                         continue;
1178                                 log_err("fio: poll clients: %s\n", strerror(errno));
1179                                 break;
1180                         } else if (!ret)
1181                                 continue;
1182                 } while (ret <= 0);
1183
1184                 for (i = 0; i < nr_clients; i++) {
1185                         if (!(pfds[i].revents & POLLIN))
1186                                 continue;
1187
1188                         client = find_client_by_fd(pfds[i].fd);
1189                         if (!client) {
1190                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1191                                 continue;
1192                         }
1193                         if (!fio_handle_client(client)) {
1194                                 log_info("client: host=%s disconnected\n",
1195                                                 client->hostname);
1196                                 remove_client(client);
1197                                 retval = 1;
1198                         } else if (client->error)
1199                                 retval = 1;
1200                         fio_put_client(client);
1201                 }
1202         }
1203
1204         free(pfds);
1205         return retval;
1206 }