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 extern void (*update_thread_status)(char *status_message, double perc);
  25
  26 struct client_eta {
  27         struct jobs_eta eta;
  28         unsigned int pending;
  29 };
  30
  31 static void fio_client_text_op(struct fio_client *client,
  32                 FILE *f, __u16 pdu_len, const char *buf)
  33 {
  34         const char *name;
  35         int fio_unused ret;
  36
  37         name = client->name ? client->name : client->hostname;
  38
  39         if (!client->skip_newline)
  40                 fprintf(f, "<%s> ", name);
  41         ret = fwrite(buf, pdu_len, 1, f);
  42         fflush(f);
  43         client->skip_newline = strchr(buf, '\n') == NULL;
  44 }
  45
  46 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  47 static void handle_ts(struct fio_net_cmd *cmd);
  48 static void handle_gs(struct fio_net_cmd *cmd);
  49 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd);
  50 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  51
  52 struct client_ops fio_client_ops = {
  53         .text_op        = fio_client_text_op,
  54         .disk_util      = handle_du,
  55         .thread_status  = handle_ts,
  56         .group_stats    = handle_gs,
  57         .eta            = handle_eta,
  58         .probe          = handle_probe,
  59         /* status display, if NULL, printf is used */
  60 };
  61
  62 static struct timeval eta_tv;
  63
  64 enum {
  65         Client_created          = 0,
  66         Client_connected        = 1,
  67         Client_started          = 2,
  68         Client_running          = 3,
  69         Client_stopped          = 4,
  70         Client_exited           = 5,
  71 };
  72
  73 static FLIST_HEAD(client_list);
  74 static FLIST_HEAD(eta_list);
  75
  76 static FLIST_HEAD(arg_list);
  77
  78 static struct thread_stat client_ts;
  79 static struct group_run_stats client_gs;
  80 static int sum_stat_clients;
  81 static int sum_stat_nr;
  82
  83 #define FIO_CLIENT_HASH_BITS    7
  84 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  85 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  86 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  87
  88 static int handle_client(struct fio_client *client, struct client_ops *ops);
  89 static void dec_jobs_eta(struct client_eta *eta);
  90
  91 static void fio_client_add_hash(struct fio_client *client)
  92 {
  93         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  94
  95         bucket &= FIO_CLIENT_HASH_MASK;
  96         flist_add(&client->hash_list, &client_hash[bucket]);
  97 }
  98
  99 static void fio_client_remove_hash(struct fio_client *client)
 100 {
 101         if (!flist_empty(&client->hash_list))
 102                 flist_del_init(&client->hash_list);
 103 }
 104
 105 static void fio_init fio_client_hash_init(void)
 106 {
 107         int i;
 108
 109         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
 110                 INIT_FLIST_HEAD(&client_hash[i]);
 111 }
 112
 113 static struct fio_client *find_client_by_fd(int fd)
 114 {
 115         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
 116         struct fio_client *client;
 117         struct flist_head *entry;
 118
 119         flist_for_each(entry, &client_hash[bucket]) {
 120                 client = flist_entry(entry, struct fio_client, hash_list);
 121
 122                 if (client->fd == fd)
 123                         return client;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 static void remove_client(struct fio_client *client)
 130 {
 131         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 132         flist_del(&client->list);
 133
 134         fio_client_remove_hash(client);
 135
 136         if (!flist_empty(&client->eta_list)) {
 137                 flist_del_init(&client->eta_list);
 138                 dec_jobs_eta(client->eta_in_flight);
 139         }
 140
 141         free(client->hostname);
 142         if (client->argv)
 143                 free(client->argv);
 144         if (client->name)
 145                 free(client->name);
 146
 147         free(client);
 148         nr_clients--;
 149         sum_stat_clients--;
 150 }
 151
 152 static void __fio_client_add_cmd_option(struct fio_client *client,
 153                                         const char *opt)
 154 {
 155         int index;
 156
 157         index = client->argc++;
 158         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 159         client->argv[index] = strdup(opt);
 160         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 161 }
 162
 163 void fio_client_add_cmd_option(void *cookie, const char *opt)
 164 {
 165         struct fio_client *client = cookie;
 166         struct flist_head *entry;
 167
 168         if (!client || !opt)
 169                 return;
 170
 171         __fio_client_add_cmd_option(client, opt);
 172
 173         /*
 174          * Duplicate arguments to shared client group
 175          */
 176         flist_for_each(entry, &arg_list) {
 177                 client = flist_entry(entry, struct fio_client, arg_list);
 178
 179                 __fio_client_add_cmd_option(client, opt);
 180         }
 181 }
 182
 183 int fio_client_add(const char *hostname, void **cookie)
 184 {
 185         struct fio_client *existing = *cookie;
 186         struct fio_client *client;
 187
 188         if (existing) {
 189                 /*
 190                  * We always add our "exec" name as the option, hence 1
 191                  * means empty.
 192                  */
 193                 if (existing->argc == 1)
 194                         flist_add_tail(&existing->arg_list, &arg_list);
 195                 else {
 196                         while (!flist_empty(&arg_list))
 197                                 flist_del_init(arg_list.next);
 198                 }
 199         }
 200
 201         client = malloc(sizeof(*client));
 202         memset(client, 0, sizeof(*client));
 203
 204         INIT_FLIST_HEAD(&client->list);
 205         INIT_FLIST_HEAD(&client->hash_list);
 206         INIT_FLIST_HEAD(&client->arg_list);
 207         INIT_FLIST_HEAD(&client->eta_list);
 208         INIT_FLIST_HEAD(&client->cmd_list);
 209
 210         if (fio_server_parse_string(hostname, &client->hostname,
 211                                         &client->is_sock, &client->port,
 212                                         &client->addr.sin_addr,
 213                                         &client->addr6.sin6_addr,
 214                                         &client->ipv6))
 215                 return -1;
 216
 217         client->fd = -1;
 218
 219         __fio_client_add_cmd_option(client, "fio");
 220
 221         flist_add(&client->list, &client_list);
 222         nr_clients++;
 223         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 224         *cookie = client;
 225         return 0;
 226 }
 227
 228 static int fio_client_connect_ip(struct fio_client *client)
 229 {
 230         struct sockaddr *addr;
 231         fio_socklen_t socklen;
 232         int fd, domain;
 233
 234         if (client->ipv6) {
 235                 client->addr6.sin6_family = AF_INET6;
 236                 client->addr6.sin6_port = htons(client->port);
 237                 domain = AF_INET6;
 238                 addr = (struct sockaddr *) &client->addr6;
 239                 socklen = sizeof(client->addr6);
 240         } else {
 241                 client->addr.sin_family = AF_INET;
 242                 client->addr.sin_port = htons(client->port);
 243                 domain = AF_INET;
 244                 addr = (struct sockaddr *) &client->addr;
 245                 socklen = sizeof(client->addr);
 246         }
 247
 248         fd = socket(domain, SOCK_STREAM, 0);
 249         if (fd < 0) {
 250                 log_err("fio: socket: %s\n", strerror(errno));
 251                 return -1;
 252         }
 253
 254         if (connect(fd, addr, socklen) < 0) {
 255                 log_err("fio: connect: %s\n", strerror(errno));
 256                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 257                                                                 client->port);
 258                 close(fd);
 259                 return -1;
 260         }
 261
 262         return fd;
 263 }
 264
 265 static int fio_client_connect_sock(struct fio_client *client)
 266 {
 267         struct sockaddr_un *addr = &client->addr_un;
 268         fio_socklen_t len;
 269         int fd;
 270
 271         memset(addr, 0, sizeof(*addr));
 272         addr->sun_family = AF_UNIX;
 273         strcpy(addr->sun_path, client->hostname);
 274
 275         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 276         if (fd < 0) {
 277                 log_err("fio: socket: %s\n", strerror(errno));
 278                 return -1;
 279         }
 280
 281         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 282         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 283                 log_err("fio: connect; %s\n", strerror(errno));
 284                 close(fd);
 285                 return -1;
 286         }
 287
 288         return fd;
 289 }
 290
 291 static int fio_client_connect(struct fio_client *client)
 292 {
 293         int fd;
 294
 295         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 296
 297         if (client->is_sock)
 298                 fd = fio_client_connect_sock(client);
 299         else
 300                 fd = fio_client_connect_ip(client);
 301
 302         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 303
 304         if (fd < 0)
 305                 return 1;
 306
 307         client->fd = fd;
 308         fio_client_add_hash(client);
 309         client->state = Client_connected;
 310         return 0;
 311 }
 312
 313 void fio_clients_terminate(void)
 314 {
 315         struct flist_head *entry;
 316         struct fio_client *client;
 317
 318         dprint(FD_NET, "client: terminate clients\n");
 319
 320         flist_for_each(entry, &client_list) {
 321                 client = flist_entry(entry, struct fio_client, list);
 322
 323                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 324         }
 325 }
 326
 327 static void sig_int(int sig)
 328 {
 329         dprint(FD_NET, "client: got signal %d\n", sig);
 330         fio_clients_terminate();
 331 }
 332
 333 static void client_signal_handler(void)
 334 {
 335         struct sigaction act;
 336
 337         memset(&act, 0, sizeof(act));
 338         act.sa_handler = sig_int;
 339         act.sa_flags = SA_RESTART;
 340         sigaction(SIGINT, &act, NULL);
 341
 342         memset(&act, 0, sizeof(act));
 343         act.sa_handler = sig_int;
 344         act.sa_flags = SA_RESTART;
 345         sigaction(SIGTERM, &act, NULL);
 346 }
 347
 348 static void probe_client(struct fio_client *client)
 349 {
 350         dprint(FD_NET, "client: send probe\n");
 351
 352         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 353 }
 354
 355 static int send_client_cmd_line(struct fio_client *client)
 356 {
 357         struct cmd_single_line_pdu *cslp;
 358         struct cmd_line_pdu *clp;
 359         unsigned long offset;
 360         unsigned int *lens;
 361         void *pdu;
 362         size_t mem;
 363         int i, ret;
 364
 365         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 366
 367         lens = malloc(client->argc * sizeof(unsigned int));
 368
 369         /*
 370          * Find out how much mem we need
 371          */
 372         for (i = 0, mem = 0; i < client->argc; i++) {
 373                 lens[i] = strlen(client->argv[i]) + 1;
 374                 mem += lens[i];
 375         }
 376
 377         /*
 378          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 379          */
 380         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 381
 382         pdu = malloc(mem);
 383         clp = pdu;
 384         offset = sizeof(*clp);
 385
 386         for (i = 0; i < client->argc; i++) {
 387                 uint16_t arg_len = lens[i];
 388
 389                 cslp = pdu + offset;
 390                 strcpy((char *) cslp->text, client->argv[i]);
 391                 cslp->len = cpu_to_le16(arg_len);
 392                 offset += sizeof(*cslp) + arg_len;
 393         }
 394
 395         free(lens);
 396         clp->lines = cpu_to_le16(client->argc);
 397         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 398         free(pdu);
 399         return ret;
 400 }
 401
 402 int fio_clients_connect(void)
 403 {
 404         struct fio_client *client;
 405         struct flist_head *entry, *tmp;
 406         int ret;
 407
 408 #ifdef WIN32
 409         WSADATA wsd;
 410         WSAStartup(MAKEWORD(2,2), &wsd);
 411 #endif
 412
 413         dprint(FD_NET, "client: connect all\n");
 414
 415         client_signal_handler();
 416
 417         flist_for_each_safe(entry, tmp, &client_list) {
 418                 client = flist_entry(entry, struct fio_client, list);
 419
 420                 ret = fio_client_connect(client);
 421                 if (ret) {
 422                         remove_client(client);
 423                         continue;
 424                 }
 425
 426                 probe_client(client);
 427
 428                 if (client->argc > 1)
 429                         send_client_cmd_line(client);
 430         }
 431
 432         return !nr_clients;
 433 }
 434
 435 /*
 436  * Send file contents to server backend. We could use sendfile(), but to remain
 437  * more portable lets just read/write the darn thing.
 438  */
 439 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 440 {
 441         struct stat sb;
 442         char *p, *buf;
 443         off_t len;
 444         int fd, ret;
 445
 446         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 447
 448         fd = open(filename, O_RDONLY);
 449         if (fd < 0) {
 450                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 451                 return 1;
 452         }
 453
 454         if (fstat(fd, &sb) < 0) {
 455                 log_err("fio: job file stat: %s\n", strerror(errno));
 456                 close(fd);
 457                 return 1;
 458         }
 459
 460         buf = malloc(sb.st_size);
 461
 462         len = sb.st_size;
 463         p = buf;
 464         do {
 465                 ret = read(fd, p, len);
 466                 if (ret > 0) {
 467                         len -= ret;
 468                         if (!len)
 469                                 break;
 470                         p += ret;
 471                         continue;
 472                 } else if (!ret)
 473                         break;
 474                 else if (errno == EAGAIN || errno == EINTR)
 475                         continue;
 476         } while (1);
 477
 478         if (len) {
 479                 log_err("fio: failed reading job file %s\n", filename);
 480                 close(fd);
 481                 free(buf);
 482                 return 1;
 483         }
 484
 485         client->sent_job = 1;
 486         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 487         free(buf);
 488         close(fd);
 489         return ret;
 490 }
 491
 492 int fio_clients_send_ini(const char *filename)
 493 {
 494         struct fio_client *client;
 495         struct flist_head *entry, *tmp;
 496
 497         flist_for_each_safe(entry, tmp, &client_list) {
 498                 client = flist_entry(entry, struct fio_client, list);
 499
 500                 if (fio_client_send_ini(client, filename))
 501                         remove_client(client);
 502
 503                 client->sent_job = 1;
 504         }
 505
 506         return !nr_clients;
 507 }
 508
 509 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 510 {
 511         dst->max_val    = le64_to_cpu(src->max_val);
 512         dst->min_val    = le64_to_cpu(src->min_val);
 513         dst->samples    = le64_to_cpu(src->samples);
 514
 515         /*
 516          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 517          */
 518         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 519         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 520 }
 521
 522 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 523 {
 524         int i, j;
 525
 526         dst->error      = le32_to_cpu(src->error);
 527         dst->groupid    = le32_to_cpu(src->groupid);
 528         dst->pid        = le32_to_cpu(src->pid);
 529         dst->members    = le32_to_cpu(src->members);
 530
 531         for (i = 0; i < 2; i++) {
 532                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 533                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 534                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 535                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 536         }
 537
 538         dst->usr_time           = le64_to_cpu(src->usr_time);
 539         dst->sys_time           = le64_to_cpu(src->sys_time);
 540         dst->ctx                = le64_to_cpu(src->ctx);
 541         dst->minf               = le64_to_cpu(src->minf);
 542         dst->majf               = le64_to_cpu(src->majf);
 543         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 544
 545         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 546                 fio_fp64_t *fps = &src->percentile_list[i];
 547                 fio_fp64_t *fpd = &dst->percentile_list[i];
 548
 549                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 550         }
 551
 552         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 553                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 554                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 555                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 556         }
 557
 558         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 559                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 560                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 561         }
 562
 563         for (i = 0; i < 2; i++)
 564                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 565                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 566
 567         for (i = 0; i < 3; i++) {
 568                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 569                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 570         }
 571
 572         dst->total_submit       = le64_to_cpu(src->total_submit);
 573         dst->total_complete     = le64_to_cpu(src->total_complete);
 574
 575         for (i = 0; i < 2; i++) {
 576                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 577                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 578         }
 579
 580         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 581         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 582         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 583         dst->first_error        = le32_to_cpu(src->first_error);
 584         dst->kb_base            = le32_to_cpu(src->kb_base);
 585 }
 586
 587 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 588 {
 589         int i;
 590
 591         for (i = 0; i < 2; i++) {
 592                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 593                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 594                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 595                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 596                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 597                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 598         }
 599
 600         dst->kb_base    = le32_to_cpu(src->kb_base);
 601         dst->groupid    = le32_to_cpu(src->groupid);
 602 }
 603
 604 static void handle_ts(struct fio_net_cmd *cmd)
 605 {
 606         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 607
 608         convert_ts(&p->ts, &p->ts);
 609         convert_gs(&p->rs, &p->rs);
 610
 611         show_thread_status(&p->ts, &p->rs);
 612
 613         if (sum_stat_clients == 1)
 614                 return;
 615
 616         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 617         sum_group_stats(&client_gs, &p->rs);
 618
 619         client_ts.members++;
 620         client_ts.groupid = p->ts.groupid;
 621
 622         if (++sum_stat_nr == sum_stat_clients) {
 623                 strcpy(client_ts.name, "All clients");
 624                 show_thread_status(&client_ts, &client_gs);
 625         }
 626 }
 627
 628 static void handle_gs(struct fio_net_cmd *cmd)
 629 {
 630         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 631
 632         convert_gs(gs, gs);
 633         show_group_stats(gs);
 634 }
 635
 636 static void convert_agg(struct disk_util_agg *agg)
 637 {
 638         int i;
 639
 640         for (i = 0; i < 2; i++) {
 641                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 642                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 643                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 644                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 645         }
 646
 647         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 648         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 649         agg->slavecount         = le32_to_cpu(agg->slavecount);
 650         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 651 }
 652
 653 static void convert_dus(struct disk_util_stat *dus)
 654 {
 655         int i;
 656
 657         for (i = 0; i < 2; i++) {
 658                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 659                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 660                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 661                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 662         }
 663
 664         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 665         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 666         dus->msec               = le64_to_cpu(dus->msec);
 667 }
 668
 669 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 670 {
 671         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 672
 673         convert_dus(&du->dus);
 674         convert_agg(&du->agg);
 675
 676         if (!client->disk_stats_shown) {
 677                 client->disk_stats_shown = 1;
 678                 log_info("\nDisk stats (read/write):\n");
 679         }
 680
 681         print_disk_util(&du->dus, &du->agg, terse_output);
 682 }
 683
 684 static void convert_jobs_eta(struct jobs_eta *je)
 685 {
 686         int i;
 687
 688         je->nr_running          = le32_to_cpu(je->nr_running);
 689         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 690         je->nr_pending          = le32_to_cpu(je->nr_pending);
 691         je->files_open          = le32_to_cpu(je->files_open);
 692         je->m_rate              = le32_to_cpu(je->m_rate);
 693         je->t_rate              = le32_to_cpu(je->t_rate);
 694         je->m_iops              = le32_to_cpu(je->m_iops);
 695         je->t_iops              = le32_to_cpu(je->t_iops);
 696
 697         for (i = 0; i < 2; i++) {
 698                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 699                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 700         }
 701
 702         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 703         je->eta_sec             = le64_to_cpu(je->eta_sec);
 704 }
 705
 706 static void sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 707 {
 708         int i;
 709
 710         dst->nr_running         += je->nr_running;
 711         dst->nr_ramp            += je->nr_ramp;
 712         dst->nr_pending         += je->nr_pending;
 713         dst->files_open         += je->files_open;
 714         dst->m_rate             += je->m_rate;
 715         dst->t_rate             += je->t_rate;
 716         dst->m_iops             += je->m_iops;
 717         dst->t_iops             += je->t_iops;
 718
 719         for (i = 0; i < 2; i++) {
 720                 dst->rate[i]    += je->rate[i];
 721                 dst->iops[i]    += je->iops[i];
 722         }
 723
 724         dst->elapsed_sec        += je->elapsed_sec;
 725
 726         if (je->eta_sec > dst->eta_sec)
 727                 dst->eta_sec = je->eta_sec;
 728 }
 729
 730 static void dec_jobs_eta(struct client_eta *eta)
 731 {
 732         if (!--eta->pending) {
 733                 display_thread_status(&eta->eta);
 734                 free(eta);
 735         }
 736 }
 737
 738 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 739 {
 740         struct fio_net_int_cmd *icmd = NULL;
 741         struct flist_head *entry;
 742
 743         flist_for_each(entry, &client->cmd_list) {
 744                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 745
 746                 if (cmd->tag == (uintptr_t) icmd)
 747                         break;
 748
 749                 icmd = NULL;
 750         }
 751
 752         if (!icmd) {
 753                 log_err("fio: client: unable to find matching tag\n");
 754                 return;
 755         }
 756
 757         flist_del(&icmd->list);
 758         cmd->tag = icmd->saved_tag;
 759         free(icmd);
 760 }
 761
 762 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 763 {
 764         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 765         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 766
 767         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 768
 769         assert(client->eta_in_flight == eta);
 770
 771         client->eta_in_flight = NULL;
 772         flist_del_init(&client->eta_list);
 773
 774         convert_jobs_eta(je);
 775         sum_jobs_eta(&eta->eta, je);
 776         dec_jobs_eta(eta);
 777 }
 778
 779 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 780 {
 781         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 782         const char *os, *arch;
 783         char bit[16];
 784
 785         os = fio_get_os_string(probe->os);
 786         if (!os)
 787                 os = "unknown";
 788
 789         arch = fio_get_arch_string(probe->arch);
 790         if (!arch)
 791                 os = "unknown";
 792
 793         sprintf(bit, "%d-bit", probe->bpp * 8);
 794
 795         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 796                 probe->hostname, probe->bigendian, bit, os, arch,
 797                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 798
 799         if (!client->name)
 800                 client->name = strdup((char *) probe->hostname);
 801 }
 802
 803 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 804 {
 805         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 806
 807         client->state = Client_started;
 808         client->jobs = le32_to_cpu(pdu->jobs);
 809 }
 810
 811 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 812 {
 813         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 814
 815         client->state = Client_stopped;
 816         client->error = le32_to_cpu(pdu->error);
 817
 818         if (client->error)
 819                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 820 }
 821
 822 static int handle_client(struct fio_client *client, struct client_ops *ops)
 823 {
 824         struct fio_net_cmd *cmd;
 825
 826         dprint(FD_NET, "client: handle %s\n", client->hostname);
 827
 828         cmd = fio_net_recv_cmd(client->fd);
 829         if (!cmd)
 830                 return 0;
 831
 832         dprint(FD_NET, "client: got cmd op %s from %s\n",
 833                                 fio_server_op(cmd->opcode), client->hostname);
 834
 835         switch (cmd->opcode) {
 836         case FIO_NET_CMD_QUIT:
 837                 remove_client(client);
 838                 free(cmd);
 839                 break;
 840         case FIO_NET_CMD_TEXT: {
 841                 const char *buf = (const char *) cmd->payload;
 842                 ops->text_op(client, f_out, cmd->pdu_len, buf);
 843                 free(cmd);
 844                 break;
 845                 }
 846         case FIO_NET_CMD_DU:
 847                 ops->disk_util(client, cmd);
 848                 free(cmd);
 849                 break;
 850         case FIO_NET_CMD_TS:
 851                 ops->thread_status(cmd);
 852                 free(cmd);
 853                 break;
 854         case FIO_NET_CMD_GS:
 855                 ops->group_stats(cmd);
 856                 free(cmd);
 857                 break;
 858         case FIO_NET_CMD_ETA:
 859                 remove_reply_cmd(client, cmd);
 860                 ops->eta(client, cmd);
 861                 free(cmd);
 862                 break;
 863         case FIO_NET_CMD_PROBE:
 864                 remove_reply_cmd(client, cmd);
 865                 ops->probe(client, cmd);
 866                 free(cmd);
 867                 break;
 868         case FIO_NET_CMD_RUN:
 869                 client->state = Client_running;
 870                 free(cmd);
 871                 break;
 872         case FIO_NET_CMD_START:
 873                 handle_start(client, cmd);
 874                 free(cmd);
 875                 break;
 876         case FIO_NET_CMD_STOP:
 877                 handle_stop(client, cmd);
 878                 free(cmd);
 879                 break;
 880         default:
 881                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
 882                 free(cmd);
 883                 break;
 884         }
 885
 886         return 1;
 887 }
 888
 889 static void request_client_etas(void)
 890 {
 891         struct fio_client *client;
 892         struct flist_head *entry;
 893         struct client_eta *eta;
 894         int skipped = 0;
 895
 896         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
 897
 898         eta = malloc(sizeof(*eta));
 899         memset(&eta->eta, 0, sizeof(eta->eta));
 900         eta->pending = nr_clients;
 901
 902         flist_for_each(entry, &client_list) {
 903                 client = flist_entry(entry, struct fio_client, list);
 904
 905                 if (!flist_empty(&client->eta_list)) {
 906                         skipped++;
 907                         continue;
 908                 }
 909                 if (client->state != Client_running)
 910                         continue;
 911
 912                 assert(!client->eta_in_flight);
 913                 flist_add_tail(&client->eta_list, &eta_list);
 914                 client->eta_in_flight = eta;
 915                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
 916                                         (uintptr_t) eta, &client->cmd_list);
 917         }
 918
 919         while (skipped--)
 920                 dec_jobs_eta(eta);
 921
 922         dprint(FD_NET, "client: requested eta tag %p\n", eta);
 923 }
 924
 925 static int client_check_cmd_timeout(struct fio_client *client,
 926                                     struct timeval *now)
 927 {
 928         struct fio_net_int_cmd *cmd;
 929         struct flist_head *entry, *tmp;
 930         int ret = 0;
 931
 932         flist_for_each_safe(entry, tmp, &client->cmd_list) {
 933                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
 934
 935                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
 936                         continue;
 937
 938                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
 939                                                 fio_server_op(cmd->cmd.opcode));
 940                 flist_del(&cmd->list);
 941                 free(cmd);
 942                 ret = 1;
 943         }
 944
 945         return flist_empty(&client->cmd_list) && ret;
 946 }
 947
 948 static int fio_client_timed_out(void)
 949 {
 950         struct fio_client *client;
 951         struct flist_head *entry, *tmp;
 952         struct timeval tv;
 953         int ret = 0;
 954
 955         gettimeofday(&tv, NULL);
 956
 957         flist_for_each_safe(entry, tmp, &client_list) {
 958                 client = flist_entry(entry, struct fio_client, list);
 959
 960                 if (flist_empty(&client->cmd_list))
 961                         continue;
 962
 963                 if (!client_check_cmd_timeout(client, &tv))
 964                         continue;
 965
 966                 log_err("fio: client %s timed out\n", client->hostname);
 967                 remove_client(client);
 968                 ret = 1;
 969         }
 970
 971         return ret;
 972 }
 973
 974 int fio_handle_clients(struct client_ops *ops)
 975 {
 976         struct pollfd *pfds;
 977         int i, ret = 0, retval = 0;
 978
 979         gettimeofday(&eta_tv, NULL);
 980
 981         pfds = malloc(nr_clients * sizeof(struct pollfd));
 982
 983         sum_stat_clients = nr_clients;
 984         init_thread_stat(&client_ts);
 985         init_group_run_stat(&client_gs);
 986
 987         /* Used by eta.c:display_thread_status() */
 988         update_thread_status = ops->thread_status_display;
 989
 990         while (!exit_backend && nr_clients) {
 991                 struct flist_head *entry, *tmp;
 992                 struct fio_client *client;
 993
 994                 i = 0;
 995                 flist_for_each_safe(entry, tmp, &client_list) {
 996                         client = flist_entry(entry, struct fio_client, list);
 997
 998                         if (!client->sent_job &&
 999                             flist_empty(&client->cmd_list)) {
1000                                 remove_client(client);
1001                                 continue;
1002                         }
1003
1004                         pfds[i].fd = client->fd;
1005                         pfds[i].events = POLLIN;
1006                         i++;
1007                 }
1008
1009                 if (!nr_clients)
1010                         break;
1011
1012                 assert(i == nr_clients);
1013
1014                 do {
1015                         struct timeval tv;
1016
1017                         gettimeofday(&tv, NULL);
1018                         if (mtime_since(&eta_tv, &tv) >= 900) {
1019                                 request_client_etas();
1020                                 memcpy(&eta_tv, &tv, sizeof(tv));
1021
1022                                 if (fio_client_timed_out())
1023                                         break;
1024                         }
1025
1026                         ret = poll(pfds, nr_clients, 100);
1027                         if (ret < 0) {
1028                                 if (errno == EINTR)
1029                                         continue;
1030                                 log_err("fio: poll clients: %s\n", strerror(errno));
1031                                 break;
1032                         } else if (!ret)
1033                                 continue;
1034                 } while (ret <= 0);
1035
1036                 for (i = 0; i < nr_clients; i++) {
1037                         if (!(pfds[i].revents & POLLIN))
1038                                 continue;
1039
1040                         client = find_client_by_fd(pfds[i].fd);
1041                         if (!client) {
1042                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1043                                 continue;
1044                         }
1045                         if (!handle_client(client, ops)) {
1046                                 log_info("client: host=%s disconnected\n",
1047                                                 client->hostname);
1048                                 remove_client(client);
1049                                 retval = 1;
1050                         } else if (client->error)
1051                                 retval = 1;
1052                 }
1053         }
1054
1055         free(pfds);
1056         return retval;
1057 }