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