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