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