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         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  40 };
  41
  42 static struct timeval eta_tv;
  43
  44 static FLIST_HEAD(client_list);
  45 static FLIST_HEAD(eta_list);
  46
  47 static FLIST_HEAD(arg_list);
  48
  49 struct thread_stat client_ts;
  50 struct group_run_stats client_gs;
  51 int sum_stat_clients;
  52
  53 static int sum_stat_nr;
  54
  55 #define FIO_CLIENT_HASH_BITS    7
  56 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  57 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  58 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  59
  60 static void fio_client_add_hash(struct fio_client *client)
  61 {
  62         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  63
  64         bucket &= FIO_CLIENT_HASH_MASK;
  65         flist_add(&client->hash_list, &client_hash[bucket]);
  66 }
  67
  68 static void fio_client_remove_hash(struct fio_client *client)
  69 {
  70         if (!flist_empty(&client->hash_list))
  71                 flist_del_init(&client->hash_list);
  72 }
  73
  74 static void fio_init fio_client_hash_init(void)
  75 {
  76         int i;
  77
  78         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  79                 INIT_FLIST_HEAD(&client_hash[i]);
  80 }
  81
  82 static struct fio_client *find_client_by_fd(int fd)
  83 {
  84         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  85         struct fio_client *client;
  86         struct flist_head *entry;
  87
  88         flist_for_each(entry, &client_hash[bucket]) {
  89                 client = flist_entry(entry, struct fio_client, hash_list);
  90
  91                 if (client->fd == fd)
  92                         return fio_get_client(client);
  93         }
  94
  95         return NULL;
  96 }
  97
  98 static void remove_client(struct fio_client *client)
  99 {
 100         assert(client->refs);
 101
 102         if (--client->refs)
 103                 return;
 104
 105         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 106         flist_del(&client->list);
 107
 108         fio_client_remove_hash(client);
 109
 110         if (!flist_empty(&client->eta_list)) {
 111                 flist_del_init(&client->eta_list);
 112                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 113         }
 114
 115         free(client->hostname);
 116         if (client->argv)
 117                 free(client->argv);
 118         if (client->name)
 119                 free(client->name);
 120
 121         free(client);
 122         nr_clients--;
 123         sum_stat_clients--;
 124 }
 125
 126 void fio_put_client(struct fio_client *client)
 127 {
 128         remove_client(client);
 129 }
 130
 131 struct fio_client *fio_get_client(struct fio_client *client)
 132 {
 133         client->refs++;
 134         return client;
 135 }
 136
 137 static void __fio_client_add_cmd_option(struct fio_client *client,
 138                                         const char *opt)
 139 {
 140         int index;
 141
 142         index = client->argc++;
 143         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 144         client->argv[index] = strdup(opt);
 145         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 146 }
 147
 148 void fio_client_add_cmd_option(void *cookie, const char *opt)
 149 {
 150         struct fio_client *client = cookie;
 151         struct flist_head *entry;
 152
 153         if (!client || !opt)
 154                 return;
 155
 156         __fio_client_add_cmd_option(client, opt);
 157
 158         /*
 159          * Duplicate arguments to shared client group
 160          */
 161         flist_for_each(entry, &arg_list) {
 162                 client = flist_entry(entry, struct fio_client, arg_list);
 163
 164                 __fio_client_add_cmd_option(client, opt);
 165         }
 166 }
 167
 168 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 169                                            const char *hostname, int type,
 170                                            int port)
 171 {
 172         struct fio_client *client;
 173
 174         client = malloc(sizeof(*client));
 175         memset(client, 0, sizeof(*client));
 176
 177         INIT_FLIST_HEAD(&client->list);
 178         INIT_FLIST_HEAD(&client->hash_list);
 179         INIT_FLIST_HEAD(&client->arg_list);
 180         INIT_FLIST_HEAD(&client->eta_list);
 181         INIT_FLIST_HEAD(&client->cmd_list);
 182
 183         client->hostname = strdup(hostname);
 184
 185         if (type == Fio_client_socket)
 186                 client->is_sock = 1;
 187         else {
 188                 int ipv6;
 189
 190                 ipv6 = type == Fio_client_ipv6;
 191                 if (fio_server_parse_host(hostname, &ipv6,
 192                                                 &client->addr.sin_addr,
 193                                                 &client->addr6.sin6_addr))
 194                         goto err;
 195
 196                 client->port = port;
 197         }
 198
 199         client->fd = -1;
 200         client->ops = ops;
 201         client->refs = 1;
 202
 203         __fio_client_add_cmd_option(client, "fio");
 204
 205         flist_add(&client->list, &client_list);
 206         nr_clients++;
 207         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 208         return client;
 209 err:
 210         free(client);
 211         return NULL;
 212 }
 213
 214 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 215 {
 216         struct fio_client *existing = *cookie;
 217         struct fio_client *client;
 218
 219         if (existing) {
 220                 /*
 221                  * We always add our "exec" name as the option, hence 1
 222                  * means empty.
 223                  */
 224                 if (existing->argc == 1)
 225                         flist_add_tail(&existing->arg_list, &arg_list);
 226                 else {
 227                         while (!flist_empty(&arg_list))
 228                                 flist_del_init(arg_list.next);
 229                 }
 230         }
 231
 232         client = malloc(sizeof(*client));
 233         memset(client, 0, sizeof(*client));
 234
 235         INIT_FLIST_HEAD(&client->list);
 236         INIT_FLIST_HEAD(&client->hash_list);
 237         INIT_FLIST_HEAD(&client->arg_list);
 238         INIT_FLIST_HEAD(&client->eta_list);
 239         INIT_FLIST_HEAD(&client->cmd_list);
 240
 241         if (fio_server_parse_string(hostname, &client->hostname,
 242                                         &client->is_sock, &client->port,
 243                                         &client->addr.sin_addr,
 244                                         &client->addr6.sin6_addr,
 245                                         &client->ipv6))
 246                 return -1;
 247
 248         client->fd = -1;
 249         client->ops = ops;
 250         client->refs = 1;
 251
 252         __fio_client_add_cmd_option(client, "fio");
 253
 254         flist_add(&client->list, &client_list);
 255         nr_clients++;
 256         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 257         *cookie = client;
 258         return 0;
 259 }
 260
 261 static void probe_client(struct fio_client *client)
 262 {
 263         dprint(FD_NET, "client: send probe\n");
 264
 265         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 266 }
 267
 268 static int fio_client_connect_ip(struct fio_client *client)
 269 {
 270         struct sockaddr *addr;
 271         fio_socklen_t socklen;
 272         int fd, domain;
 273
 274         if (client->ipv6) {
 275                 client->addr6.sin6_family = AF_INET6;
 276                 client->addr6.sin6_port = htons(client->port);
 277                 domain = AF_INET6;
 278                 addr = (struct sockaddr *) &client->addr6;
 279                 socklen = sizeof(client->addr6);
 280         } else {
 281                 client->addr.sin_family = AF_INET;
 282                 client->addr.sin_port = htons(client->port);
 283                 domain = AF_INET;
 284                 addr = (struct sockaddr *) &client->addr;
 285                 socklen = sizeof(client->addr);
 286         }
 287
 288         fd = socket(domain, SOCK_STREAM, 0);
 289         if (fd < 0) {
 290                 int ret = -errno;
 291
 292                 log_err("fio: socket: %s\n", strerror(errno));
 293                 return ret;
 294         }
 295
 296         if (connect(fd, addr, socklen) < 0) {
 297                 int ret = -errno;
 298
 299                 log_err("fio: connect: %s\n", strerror(errno));
 300                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 301                                                                 client->port);
 302                 close(fd);
 303                 return ret;
 304         }
 305
 306         return fd;
 307 }
 308
 309 static int fio_client_connect_sock(struct fio_client *client)
 310 {
 311         struct sockaddr_un *addr = &client->addr_un;
 312         fio_socklen_t len;
 313         int fd;
 314
 315         memset(addr, 0, sizeof(*addr));
 316         addr->sun_family = AF_UNIX;
 317         strcpy(addr->sun_path, client->hostname);
 318
 319         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 320         if (fd < 0) {
 321                 int ret = -errno;
 322
 323                 log_err("fio: socket: %s\n", strerror(errno));
 324                 return ret;
 325         }
 326
 327         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 328         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 329                 int ret = -errno;
 330
 331                 log_err("fio: connect; %s\n", strerror(errno));
 332                 close(fd);
 333                 return ret;
 334         }
 335
 336         return fd;
 337 }
 338
 339 int fio_client_connect(struct fio_client *client)
 340 {
 341         int fd;
 342
 343         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 344
 345         if (client->is_sock)
 346                 fd = fio_client_connect_sock(client);
 347         else
 348                 fd = fio_client_connect_ip(client);
 349
 350         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 351
 352         if (fd < 0)
 353                 return fd;
 354
 355         client->fd = fd;
 356         fio_client_add_hash(client);
 357         client->state = Client_connected;
 358
 359         probe_client(client);
 360         return 0;
 361 }
 362
 363 void fio_client_terminate(struct fio_client *client)
 364 {
 365         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 366 }
 367
 368 void fio_clients_terminate(void)
 369 {
 370         struct flist_head *entry;
 371         struct fio_client *client;
 372
 373         dprint(FD_NET, "client: terminate clients\n");
 374
 375         flist_for_each(entry, &client_list) {
 376                 client = flist_entry(entry, struct fio_client, list);
 377                 fio_client_terminate(client);
 378         }
 379 }
 380
 381 static void sig_int(int sig)
 382 {
 383         dprint(FD_NET, "client: got signal %d\n", sig);
 384         fio_clients_terminate();
 385 }
 386
 387 static void client_signal_handler(void)
 388 {
 389         struct sigaction act;
 390
 391         memset(&act, 0, sizeof(act));
 392         act.sa_handler = sig_int;
 393         act.sa_flags = SA_RESTART;
 394         sigaction(SIGINT, &act, NULL);
 395
 396         memset(&act, 0, sizeof(act));
 397         act.sa_handler = sig_int;
 398         act.sa_flags = SA_RESTART;
 399         sigaction(SIGTERM, &act, NULL);
 400 }
 401
 402 static int send_client_cmd_line(struct fio_client *client)
 403 {
 404         struct cmd_single_line_pdu *cslp;
 405         struct cmd_line_pdu *clp;
 406         unsigned long offset;
 407         unsigned int *lens;
 408         void *pdu;
 409         size_t mem;
 410         int i, ret;
 411
 412         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 413
 414         lens = malloc(client->argc * sizeof(unsigned int));
 415
 416         /*
 417          * Find out how much mem we need
 418          */
 419         for (i = 0, mem = 0; i < client->argc; i++) {
 420                 lens[i] = strlen(client->argv[i]) + 1;
 421                 mem += lens[i];
 422         }
 423
 424         /*
 425          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 426          */
 427         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 428
 429         pdu = malloc(mem);
 430         clp = pdu;
 431         offset = sizeof(*clp);
 432
 433         for (i = 0; i < client->argc; i++) {
 434                 uint16_t arg_len = lens[i];
 435
 436                 cslp = pdu + offset;
 437                 strcpy((char *) cslp->text, client->argv[i]);
 438                 cslp->len = cpu_to_le16(arg_len);
 439                 offset += sizeof(*cslp) + arg_len;
 440         }
 441
 442         free(lens);
 443         clp->lines = cpu_to_le16(client->argc);
 444         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 445         free(pdu);
 446         return ret;
 447 }
 448
 449 int fio_clients_connect(void)
 450 {
 451         struct fio_client *client;
 452         struct flist_head *entry, *tmp;
 453         int ret;
 454
 455 #ifdef WIN32
 456         WSADATA wsd;
 457         WSAStartup(MAKEWORD(2,2), &wsd);
 458 #endif
 459
 460         dprint(FD_NET, "client: connect all\n");
 461
 462         client_signal_handler();
 463
 464         flist_for_each_safe(entry, tmp, &client_list) {
 465                 client = flist_entry(entry, struct fio_client, list);
 466
 467                 ret = fio_client_connect(client);
 468                 if (ret) {
 469                         remove_client(client);
 470                         continue;
 471                 }
 472
 473                 if (client->argc > 1)
 474                         send_client_cmd_line(client);
 475         }
 476
 477         return !nr_clients;
 478 }
 479
 480 int fio_start_client(struct fio_client *client)
 481 {
 482         dprint(FD_NET, "client: start %s\n", client->hostname);
 483         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 484 }
 485
 486 int fio_start_all_clients(void)
 487 {
 488         struct fio_client *client;
 489         struct flist_head *entry, *tmp;
 490         int ret;
 491
 492         dprint(FD_NET, "client: start all\n");
 493
 494         flist_for_each_safe(entry, tmp, &client_list) {
 495                 client = flist_entry(entry, struct fio_client, list);
 496
 497                 ret = fio_start_client(client);
 498                 if (ret) {
 499                         remove_client(client);
 500                         continue;
 501                 }
 502         }
 503
 504         return flist_empty(&client_list);
 505 }
 506
 507 /*
 508  * Send file contents to server backend. We could use sendfile(), but to remain
 509  * more portable lets just read/write the darn thing.
 510  */
 511 static int __fio_client_send_ini(struct fio_client *client, const char *filename)
 512 {
 513         struct stat sb;
 514         char *p, *buf;
 515         off_t len;
 516         int fd, ret;
 517
 518         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 519
 520         fd = open(filename, O_RDONLY);
 521         if (fd < 0) {
 522                 int ret = -errno;
 523
 524                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 525                 return ret;
 526         }
 527
 528         if (fstat(fd, &sb) < 0) {
 529                 int ret = -errno;
 530
 531                 log_err("fio: job file stat: %s\n", strerror(errno));
 532                 close(fd);
 533                 return ret;
 534         }
 535
 536         buf = malloc(sb.st_size);
 537
 538         len = sb.st_size;
 539         p = buf;
 540         do {
 541                 ret = read(fd, p, len);
 542                 if (ret > 0) {
 543                         len -= ret;
 544                         if (!len)
 545                                 break;
 546                         p += ret;
 547                         continue;
 548                 } else if (!ret)
 549                         break;
 550                 else if (errno == EAGAIN || errno == EINTR)
 551                         continue;
 552         } while (1);
 553
 554         if (len) {
 555                 log_err("fio: failed reading job file %s\n", filename);
 556                 close(fd);
 557                 free(buf);
 558                 return 1;
 559         }
 560
 561         client->sent_job = 1;
 562         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 563         free(buf);
 564         close(fd);
 565         return ret;
 566 }
 567
 568 int fio_client_send_ini(struct fio_client *client, const char *filename)
 569 {
 570         int ret;
 571
 572         ret = __fio_client_send_ini(client, filename);
 573         if (ret) {
 574                 remove_client(client);
 575                 return ret;
 576         }
 577
 578         client->sent_job = 1;
 579         return ret;
 580 }
 581
 582 int fio_clients_send_ini(const char *filename)
 583 {
 584         struct fio_client *client;
 585         struct flist_head *entry, *tmp;
 586
 587         flist_for_each_safe(entry, tmp, &client_list) {
 588                 client = flist_entry(entry, struct fio_client, list);
 589
 590                 fio_client_send_ini(client, filename);
 591         }
 592
 593         return !nr_clients;
 594 }
 595
 596 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 597 {
 598         dst->max_val    = le64_to_cpu(src->max_val);
 599         dst->min_val    = le64_to_cpu(src->min_val);
 600         dst->samples    = le64_to_cpu(src->samples);
 601
 602         /*
 603          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 604          */
 605         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 606         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 607 }
 608
 609 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 610 {
 611         int i, j;
 612
 613         dst->error      = le32_to_cpu(src->error);
 614         dst->groupid    = le32_to_cpu(src->groupid);
 615         dst->pid        = le32_to_cpu(src->pid);
 616         dst->members    = le32_to_cpu(src->members);
 617
 618         for (i = 0; i < 2; i++) {
 619                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 620                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 621                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 622                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 623         }
 624
 625         dst->usr_time           = le64_to_cpu(src->usr_time);
 626         dst->sys_time           = le64_to_cpu(src->sys_time);
 627         dst->ctx                = le64_to_cpu(src->ctx);
 628         dst->minf               = le64_to_cpu(src->minf);
 629         dst->majf               = le64_to_cpu(src->majf);
 630         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 631
 632         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 633                 fio_fp64_t *fps = &src->percentile_list[i];
 634                 fio_fp64_t *fpd = &dst->percentile_list[i];
 635
 636                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 637         }
 638
 639         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 640                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 641                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 642                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 643         }
 644
 645         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 646                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 647                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 648         }
 649
 650         for (i = 0; i < 2; i++)
 651                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 652                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 653
 654         for (i = 0; i < 3; i++) {
 655                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 656                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 657         }
 658
 659         dst->total_submit       = le64_to_cpu(src->total_submit);
 660         dst->total_complete     = le64_to_cpu(src->total_complete);
 661
 662         for (i = 0; i < 2; i++) {
 663                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 664                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 665         }
 666
 667         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 668         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 669         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 670         dst->first_error        = le32_to_cpu(src->first_error);
 671         dst->kb_base            = le32_to_cpu(src->kb_base);
 672 }
 673
 674 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 675 {
 676         int i;
 677
 678         for (i = 0; i < 2; i++) {
 679                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 680                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 681                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 682                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 683                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 684                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 685         }
 686
 687         dst->kb_base    = le32_to_cpu(src->kb_base);
 688         dst->groupid    = le32_to_cpu(src->groupid);
 689 }
 690
 691 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 692 {
 693         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 694
 695         show_thread_status(&p->ts, &p->rs);
 696
 697         if (sum_stat_clients == 1)
 698                 return;
 699
 700         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 701         sum_group_stats(&client_gs, &p->rs);
 702
 703         client_ts.members++;
 704         client_ts.groupid = p->ts.groupid;
 705
 706         if (++sum_stat_nr == sum_stat_clients) {
 707                 strcpy(client_ts.name, "All clients");
 708                 show_thread_status(&client_ts, &client_gs);
 709         }
 710 }
 711
 712 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 713 {
 714         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 715
 716         show_group_stats(gs);
 717 }
 718
 719 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 720 {
 721         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 722         const char *buf = (const char *) pdu->buf;
 723         const char *name;
 724         int fio_unused ret;
 725
 726         name = client->name ? client->name : client->hostname;
 727
 728         if (!client->skip_newline)
 729                 fprintf(f_out, "<%s> ", name);
 730         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 731         fflush(f_out);
 732         client->skip_newline = strchr(buf, '\n') == NULL;
 733 }
 734
 735 static void convert_agg(struct disk_util_agg *agg)
 736 {
 737         int i;
 738
 739         for (i = 0; i < 2; i++) {
 740                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 741                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 742                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 743                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 744         }
 745
 746         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 747         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 748         agg->slavecount         = le32_to_cpu(agg->slavecount);
 749         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 750 }
 751
 752 static void convert_dus(struct disk_util_stat *dus)
 753 {
 754         int i;
 755
 756         for (i = 0; i < 2; i++) {
 757                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 758                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 759                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 760                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 761         }
 762
 763         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 764         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 765         dus->msec               = le64_to_cpu(dus->msec);
 766 }
 767
 768 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 769 {
 770         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 771
 772         if (!client->disk_stats_shown) {
 773                 client->disk_stats_shown = 1;
 774                 log_info("\nDisk stats (read/write):\n");
 775         }
 776
 777         print_disk_util(&du->dus, &du->agg, terse_output);
 778 }
 779
 780 static void convert_jobs_eta(struct jobs_eta *je)
 781 {
 782         int i;
 783
 784         je->nr_running          = le32_to_cpu(je->nr_running);
 785         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 786         je->nr_pending          = le32_to_cpu(je->nr_pending);
 787         je->files_open          = le32_to_cpu(je->files_open);
 788
 789         for (i = 0; i < 2; i++) {
 790                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 791                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 792                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 793                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 794                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 795                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 796         }
 797
 798         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 799         je->eta_sec             = le64_to_cpu(je->eta_sec);
 800         je->nr_threads          = le32_to_cpu(je->nr_threads);
 801 }
 802
 803 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 804 {
 805         int i;
 806
 807         dst->nr_running         += je->nr_running;
 808         dst->nr_ramp            += je->nr_ramp;
 809         dst->nr_pending         += je->nr_pending;
 810         dst->files_open         += je->files_open;
 811
 812         for (i = 0; i < 2; i++) {
 813                 dst->m_rate[i]  += je->m_rate[i];
 814                 dst->t_rate[i]  += je->t_rate[i];
 815                 dst->m_iops[i]  += je->m_iops[i];
 816                 dst->t_iops[i]  += je->t_iops[i];
 817                 dst->rate[i]    += je->rate[i];
 818                 dst->iops[i]    += je->iops[i];
 819         }
 820
 821         dst->elapsed_sec        += je->elapsed_sec;
 822
 823         if (je->eta_sec > dst->eta_sec)
 824                 dst->eta_sec = je->eta_sec;
 825
 826         dst->nr_threads         += je->nr_threads;
 827         /* we need to handle je->run_str too ... */
 828 }
 829
 830 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 831 {
 832         if (!--eta->pending) {
 833                 eta_fn(&eta->eta);
 834                 free(eta);
 835         }
 836 }
 837
 838 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 839 {
 840         struct fio_net_int_cmd *icmd = NULL;
 841         struct flist_head *entry;
 842
 843         flist_for_each(entry, &client->cmd_list) {
 844                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 845
 846                 if (cmd->tag == (uintptr_t) icmd)
 847                         break;
 848
 849                 icmd = NULL;
 850         }
 851
 852         if (!icmd) {
 853                 log_err("fio: client: unable to find matching tag\n");
 854                 return;
 855         }
 856
 857         flist_del(&icmd->list);
 858         cmd->tag = icmd->saved_tag;
 859         free(icmd);
 860 }
 861
 862 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 863 {
 864         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 865         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 866
 867         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 868
 869         assert(client->eta_in_flight == eta);
 870
 871         client->eta_in_flight = NULL;
 872         flist_del_init(&client->eta_list);
 873
 874         if (client->ops->jobs_eta)
 875                 client->ops->jobs_eta(client, je);
 876
 877         fio_client_sum_jobs_eta(&eta->eta, je);
 878         fio_client_dec_jobs_eta(eta, client->ops->eta);
 879 }
 880
 881 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 882 {
 883         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 884         const char *os, *arch;
 885         char bit[16];
 886
 887         os = fio_get_os_string(probe->os);
 888         if (!os)
 889                 os = "unknown";
 890
 891         arch = fio_get_arch_string(probe->arch);
 892         if (!arch)
 893                 os = "unknown";
 894
 895         sprintf(bit, "%d-bit", probe->bpp * 8);
 896
 897         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 898                 probe->hostname, probe->bigendian, bit, os, arch,
 899                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 900
 901         if (!client->name)
 902                 client->name = strdup((char *) probe->hostname);
 903 }
 904
 905 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 906 {
 907         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 908
 909         client->state = Client_started;
 910         client->jobs = le32_to_cpu(pdu->jobs);
 911 }
 912
 913 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 914 {
 915         if (client->error)
 916                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 917 }
 918
 919 static void convert_stop(struct fio_net_cmd *cmd)
 920 {
 921         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 922
 923         pdu->error = le32_to_cpu(pdu->error);
 924 }
 925
 926 static void convert_text(struct fio_net_cmd *cmd)
 927 {
 928         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 929
 930         pdu->level      = le32_to_cpu(pdu->level);
 931         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
 932         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
 933         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
 934 }
 935
 936 int fio_handle_client(struct fio_client *client)
 937 {
 938         struct client_ops *ops = client->ops;
 939         struct fio_net_cmd *cmd;
 940
 941         dprint(FD_NET, "client: handle %s\n", client->hostname);
 942
 943         cmd = fio_net_recv_cmd(client->fd);
 944         if (!cmd)
 945                 return 0;
 946
 947         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
 948                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
 949
 950         switch (cmd->opcode) {
 951         case FIO_NET_CMD_QUIT:
 952                 if (ops->quit)
 953                         ops->quit(client);
 954                 remove_client(client);
 955                 free(cmd);
 956                 break;
 957         case FIO_NET_CMD_TEXT:
 958                 convert_text(cmd);
 959                 ops->text_op(client, cmd);
 960                 free(cmd);
 961                 break;
 962         case FIO_NET_CMD_DU: {
 963                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 964
 965                 convert_dus(&du->dus);
 966                 convert_agg(&du->agg);
 967
 968                 ops->disk_util(client, cmd);
 969                 free(cmd);
 970                 break;
 971                 }
 972         case FIO_NET_CMD_TS: {
 973                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 974
 975                 convert_ts(&p->ts, &p->ts);
 976                 convert_gs(&p->rs, &p->rs);
 977
 978                 ops->thread_status(client, cmd);
 979                 free(cmd);
 980                 break;
 981                 }
 982         case FIO_NET_CMD_GS: {
 983                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 984
 985                 convert_gs(gs, gs);
 986
 987                 ops->group_stats(client, cmd);
 988                 free(cmd);
 989                 break;
 990                 }
 991         case FIO_NET_CMD_ETA: {
 992                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 993
 994                 remove_reply_cmd(client, cmd);
 995                 convert_jobs_eta(je);
 996                 handle_eta(client, cmd);
 997                 free(cmd);
 998                 break;
 999                 }
1000         case FIO_NET_CMD_PROBE:
1001                 remove_reply_cmd(client, cmd);
1002                 ops->probe(client, cmd);
1003                 free(cmd);
1004                 break;
1005         case FIO_NET_CMD_SERVER_START:
1006                 client->state = Client_running;
1007                 free(cmd);
1008                 break;
1009         case FIO_NET_CMD_START:
1010                 handle_start(client, cmd);
1011                 free(cmd);
1012                 break;
1013         case FIO_NET_CMD_STOP: {
1014                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1015
1016                 convert_stop(cmd);
1017                 client->state = Client_stopped;
1018                 client->error = pdu->error;
1019                 ops->stop(client, cmd);
1020                 free(cmd);
1021                 break;
1022                 }
1023         case FIO_NET_CMD_ADD_JOB:
1024                 if (ops->add_job)
1025                         ops->add_job(client, cmd);
1026                 free(cmd);
1027                 break;
1028         default:
1029                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1030                 free(cmd);
1031                 break;
1032         }
1033
1034         return 1;
1035 }
1036
1037 static void request_client_etas(struct client_ops *ops)
1038 {
1039         struct fio_client *client;
1040         struct flist_head *entry;
1041         struct client_eta *eta;
1042         int skipped = 0;
1043
1044         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1045
1046         eta = malloc(sizeof(*eta));
1047         memset(&eta->eta, 0, sizeof(eta->eta));
1048         eta->pending = nr_clients;
1049
1050         flist_for_each(entry, &client_list) {
1051                 client = flist_entry(entry, struct fio_client, list);
1052
1053                 if (!flist_empty(&client->eta_list)) {
1054                         skipped++;
1055                         continue;
1056                 }
1057                 if (client->state != Client_running)
1058                         continue;
1059
1060                 assert(!client->eta_in_flight);
1061                 flist_add_tail(&client->eta_list, &eta_list);
1062                 client->eta_in_flight = eta;
1063                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1064                                         (uintptr_t) eta, &client->cmd_list);
1065         }
1066
1067         while (skipped--)
1068                 fio_client_dec_jobs_eta(eta, ops->eta);
1069
1070         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1071 }
1072
1073 static int client_check_cmd_timeout(struct fio_client *client,
1074                                     struct timeval *now)
1075 {
1076         struct fio_net_int_cmd *cmd;
1077         struct flist_head *entry, *tmp;
1078         int ret = 0;
1079
1080         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1081                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
1082
1083                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1084                         continue;
1085
1086                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1087                                                 fio_server_op(cmd->cmd.opcode));
1088                 flist_del(&cmd->list);
1089                 free(cmd);
1090                 ret = 1;
1091         }
1092
1093         return flist_empty(&client->cmd_list) && ret;
1094 }
1095
1096 static int fio_check_clients_timed_out(void)
1097 {
1098         struct fio_client *client;
1099         struct flist_head *entry, *tmp;
1100         struct timeval tv;
1101         int ret = 0;
1102
1103         gettimeofday(&tv, NULL);
1104
1105         flist_for_each_safe(entry, tmp, &client_list) {
1106                 client = flist_entry(entry, struct fio_client, list);
1107
1108                 if (flist_empty(&client->cmd_list))
1109                         continue;
1110
1111                 if (!client_check_cmd_timeout(client, &tv))
1112                         continue;
1113
1114                 if (client->ops->timed_out)
1115                         client->ops->timed_out(client);
1116                 else
1117                         log_err("fio: client %s timed out\n", client->hostname);
1118
1119                 remove_client(client);
1120                 ret = 1;
1121         }
1122
1123         return ret;
1124 }
1125
1126 int fio_handle_clients(struct client_ops *ops)
1127 {
1128         struct pollfd *pfds;
1129         int i, ret = 0, retval = 0;
1130
1131         gettimeofday(&eta_tv, NULL);
1132
1133         pfds = malloc(nr_clients * sizeof(struct pollfd));
1134
1135         sum_stat_clients = nr_clients;
1136         init_thread_stat(&client_ts);
1137         init_group_run_stat(&client_gs);
1138
1139         while (!exit_backend && nr_clients) {
1140                 struct flist_head *entry, *tmp;
1141                 struct fio_client *client;
1142
1143                 i = 0;
1144                 flist_for_each_safe(entry, tmp, &client_list) {
1145                         client = flist_entry(entry, struct fio_client, list);
1146
1147                         if (!client->sent_job && !client->ops->stay_connected &&
1148                             flist_empty(&client->cmd_list)) {
1149                                 remove_client(client);
1150                                 continue;
1151                         }
1152
1153                         pfds[i].fd = client->fd;
1154                         pfds[i].events = POLLIN;
1155                         i++;
1156                 }
1157
1158                 if (!nr_clients)
1159                         break;
1160
1161                 assert(i == nr_clients);
1162
1163                 do {
1164                         struct timeval tv;
1165
1166                         gettimeofday(&tv, NULL);
1167                         if (mtime_since(&eta_tv, &tv) >= ops->eta_msec) {
1168                                 request_client_etas(ops);
1169                                 memcpy(&eta_tv, &tv, sizeof(tv));
1170
1171                                 if (fio_check_clients_timed_out())
1172                                         break;
1173                         }
1174
1175                         ret = poll(pfds, nr_clients, 100);
1176                         if (ret < 0) {
1177                                 if (errno == EINTR)
1178                                         continue;
1179                                 log_err("fio: poll clients: %s\n", strerror(errno));
1180                                 break;
1181                         } else if (!ret)
1182                                 continue;
1183                 } while (ret <= 0);
1184
1185                 for (i = 0; i < nr_clients; i++) {
1186                         if (!(pfds[i].revents & POLLIN))
1187                                 continue;
1188
1189                         client = find_client_by_fd(pfds[i].fd);
1190                         if (!client) {
1191                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1192                                 continue;
1193                         }
1194                         if (!fio_handle_client(client)) {
1195                                 log_info("client: host=%s disconnected\n",
1196                                                 client->hostname);
1197                                 remove_client(client);
1198                                 retval = 1;
1199                         } else if (client->error)
1200                                 retval = 1;
1201                         fio_put_client(client);
1202                 }
1203         }
1204
1205         free(pfds);
1206         return retval;
1207 }