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