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