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 "client.h"
  20 #include "server.h"
  21 #include "flist.h"
  22 #include "hash.h"
  23
  24 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd);
  25 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd);
  26 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd);
  27 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd);
  28 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd);
  29 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd);
  30 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd);
  31
  32 struct client_ops fio_client_ops = {
  33         .text_op        = handle_text,
  34         .disk_util      = handle_du,
  35         .thread_status  = handle_ts,
  36         .group_stats    = handle_gs,
  37         .stop           = handle_stop,
  38         .start          = handle_start,
  39         .eta            = display_thread_status,
  40         .probe          = handle_probe,
  41         .eta_msec       = FIO_CLIENT_DEF_ETA_MSEC,
  42 };
  43
  44 static struct timeval eta_tv;
  45
  46 static FLIST_HEAD(client_list);
  47 static FLIST_HEAD(eta_list);
  48
  49 static FLIST_HEAD(arg_list);
  50
  51 struct thread_stat client_ts;
  52 struct group_run_stats client_gs;
  53 int sum_stat_clients;
  54
  55 static int sum_stat_nr;
  56
  57 #define FIO_CLIENT_HASH_BITS    7
  58 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  59 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  60 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  61
  62 static void fio_client_add_hash(struct fio_client *client)
  63 {
  64         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  65
  66         bucket &= FIO_CLIENT_HASH_MASK;
  67         flist_add(&client->hash_list, &client_hash[bucket]);
  68 }
  69
  70 static void fio_client_remove_hash(struct fio_client *client)
  71 {
  72         if (!flist_empty(&client->hash_list))
  73                 flist_del_init(&client->hash_list);
  74 }
  75
  76 static void fio_init fio_client_hash_init(void)
  77 {
  78         int i;
  79
  80         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  81                 INIT_FLIST_HEAD(&client_hash[i]);
  82 }
  83
  84 static struct fio_client *find_client_by_fd(int fd)
  85 {
  86         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  87         struct fio_client *client;
  88         struct flist_head *entry;
  89
  90         flist_for_each(entry, &client_hash[bucket]) {
  91                 client = flist_entry(entry, struct fio_client, hash_list);
  92
  93                 if (client->fd == fd)
  94                         return fio_get_client(client);
  95         }
  96
  97         return NULL;
  98 }
  99
 100 static void remove_client(struct fio_client *client)
 101 {
 102         assert(client->refs);
 103
 104         if (--client->refs)
 105                 return;
 106
 107         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 108         flist_del(&client->list);
 109
 110         fio_client_remove_hash(client);
 111
 112         if (!flist_empty(&client->eta_list)) {
 113                 flist_del_init(&client->eta_list);
 114                 fio_client_dec_jobs_eta(client->eta_in_flight, client->ops->eta);
 115         }
 116
 117         free(client->hostname);
 118         if (client->argv)
 119                 free(client->argv);
 120         if (client->name)
 121                 free(client->name);
 122
 123         free(client);
 124         nr_clients--;
 125         sum_stat_clients--;
 126 }
 127
 128 void fio_put_client(struct fio_client *client)
 129 {
 130         remove_client(client);
 131 }
 132
 133 struct fio_client *fio_get_client(struct fio_client *client)
 134 {
 135         client->refs++;
 136         return client;
 137 }
 138
 139 static void __fio_client_add_cmd_option(struct fio_client *client,
 140                                         const char *opt)
 141 {
 142         int index;
 143
 144         index = client->argc++;
 145         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 146         client->argv[index] = strdup(opt);
 147         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 148 }
 149
 150 void fio_client_add_cmd_option(void *cookie, const char *opt)
 151 {
 152         struct fio_client *client = cookie;
 153         struct flist_head *entry;
 154
 155         if (!client || !opt)
 156                 return;
 157
 158         __fio_client_add_cmd_option(client, opt);
 159
 160         /*
 161          * Duplicate arguments to shared client group
 162          */
 163         flist_for_each(entry, &arg_list) {
 164                 client = flist_entry(entry, struct fio_client, arg_list);
 165
 166                 __fio_client_add_cmd_option(client, opt);
 167         }
 168 }
 169
 170 struct fio_client *fio_client_add_explicit(struct client_ops *ops,
 171                                            const char *hostname, int type,
 172                                            int port)
 173 {
 174         struct fio_client *client;
 175
 176         client = malloc(sizeof(*client));
 177         memset(client, 0, sizeof(*client));
 178
 179         INIT_FLIST_HEAD(&client->list);
 180         INIT_FLIST_HEAD(&client->hash_list);
 181         INIT_FLIST_HEAD(&client->arg_list);
 182         INIT_FLIST_HEAD(&client->eta_list);
 183         INIT_FLIST_HEAD(&client->cmd_list);
 184
 185         client->hostname = strdup(hostname);
 186
 187         if (type == Fio_client_socket)
 188                 client->is_sock = 1;
 189         else {
 190                 int ipv6;
 191
 192                 ipv6 = type == Fio_client_ipv6;
 193                 if (fio_server_parse_host(hostname, &ipv6,
 194                                                 &client->addr.sin_addr,
 195                                                 &client->addr6.sin6_addr))
 196                         goto err;
 197
 198                 client->port = port;
 199         }
 200
 201         client->fd = -1;
 202         client->ops = ops;
 203         client->refs = 1;
 204
 205         __fio_client_add_cmd_option(client, "fio");
 206
 207         flist_add(&client->list, &client_list);
 208         nr_clients++;
 209         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 210         return client;
 211 err:
 212         free(client);
 213         return NULL;
 214 }
 215
 216 int fio_client_add(struct client_ops *ops, const char *hostname, void **cookie)
 217 {
 218         struct fio_client *existing = *cookie;
 219         struct fio_client *client;
 220
 221         if (existing) {
 222                 /*
 223                  * We always add our "exec" name as the option, hence 1
 224                  * means empty.
 225                  */
 226                 if (existing->argc == 1)
 227                         flist_add_tail(&existing->arg_list, &arg_list);
 228                 else {
 229                         while (!flist_empty(&arg_list))
 230                                 flist_del_init(arg_list.next);
 231                 }
 232         }
 233
 234         client = malloc(sizeof(*client));
 235         memset(client, 0, sizeof(*client));
 236
 237         INIT_FLIST_HEAD(&client->list);
 238         INIT_FLIST_HEAD(&client->hash_list);
 239         INIT_FLIST_HEAD(&client->arg_list);
 240         INIT_FLIST_HEAD(&client->eta_list);
 241         INIT_FLIST_HEAD(&client->cmd_list);
 242
 243         if (fio_server_parse_string(hostname, &client->hostname,
 244                                         &client->is_sock, &client->port,
 245                                         &client->addr.sin_addr,
 246                                         &client->addr6.sin6_addr,
 247                                         &client->ipv6))
 248                 return -1;
 249
 250         client->fd = -1;
 251         client->ops = ops;
 252         client->refs = 1;
 253
 254         __fio_client_add_cmd_option(client, "fio");
 255
 256         flist_add(&client->list, &client_list);
 257         nr_clients++;
 258         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 259         *cookie = client;
 260         return 0;
 261 }
 262
 263 static void probe_client(struct fio_client *client)
 264 {
 265         dprint(FD_NET, "client: send probe\n");
 266
 267         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0, &client->cmd_list);
 268 }
 269
 270 static int fio_client_connect_ip(struct fio_client *client)
 271 {
 272         struct sockaddr *addr;
 273         fio_socklen_t socklen;
 274         int fd, domain;
 275
 276         if (client->ipv6) {
 277                 client->addr6.sin6_family = AF_INET6;
 278                 client->addr6.sin6_port = htons(client->port);
 279                 domain = AF_INET6;
 280                 addr = (struct sockaddr *) &client->addr6;
 281                 socklen = sizeof(client->addr6);
 282         } else {
 283                 client->addr.sin_family = AF_INET;
 284                 client->addr.sin_port = htons(client->port);
 285                 domain = AF_INET;
 286                 addr = (struct sockaddr *) &client->addr;
 287                 socklen = sizeof(client->addr);
 288         }
 289
 290         fd = socket(domain, SOCK_STREAM, 0);
 291         if (fd < 0) {
 292                 int ret = -errno;
 293
 294                 log_err("fio: socket: %s\n", strerror(errno));
 295                 return ret;
 296         }
 297
 298         if (connect(fd, addr, socklen) < 0) {
 299                 int ret = -errno;
 300
 301                 log_err("fio: connect: %s\n", strerror(errno));
 302                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 303                                                                 client->port);
 304                 close(fd);
 305                 return ret;
 306         }
 307
 308         return fd;
 309 }
 310
 311 static int fio_client_connect_sock(struct fio_client *client)
 312 {
 313         struct sockaddr_un *addr = &client->addr_un;
 314         fio_socklen_t len;
 315         int fd;
 316
 317         memset(addr, 0, sizeof(*addr));
 318         addr->sun_family = AF_UNIX;
 319         strcpy(addr->sun_path, client->hostname);
 320
 321         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 322         if (fd < 0) {
 323                 int ret = -errno;
 324
 325                 log_err("fio: socket: %s\n", strerror(errno));
 326                 return ret;
 327         }
 328
 329         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 330         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 331                 int ret = -errno;
 332
 333                 log_err("fio: connect; %s\n", strerror(errno));
 334                 close(fd);
 335                 return ret;
 336         }
 337
 338         return fd;
 339 }
 340
 341 int fio_client_connect(struct fio_client *client)
 342 {
 343         int fd;
 344
 345         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 346
 347         if (client->is_sock)
 348                 fd = fio_client_connect_sock(client);
 349         else
 350                 fd = fio_client_connect_ip(client);
 351
 352         dprint(FD_NET, "client: %s connected %d\n", client->hostname, fd);
 353
 354         if (fd < 0)
 355                 return fd;
 356
 357         client->fd = fd;
 358         fio_client_add_hash(client);
 359         client->state = Client_connected;
 360
 361         probe_client(client);
 362         return 0;
 363 }
 364
 365 void fio_client_terminate(struct fio_client *client)
 366 {
 367         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0, NULL);
 368 }
 369
 370 void fio_clients_terminate(void)
 371 {
 372         struct flist_head *entry;
 373         struct fio_client *client;
 374
 375         dprint(FD_NET, "client: terminate clients\n");
 376
 377         flist_for_each(entry, &client_list) {
 378                 client = flist_entry(entry, struct fio_client, list);
 379                 fio_client_terminate(client);
 380         }
 381 }
 382
 383 static void sig_int(int sig)
 384 {
 385         dprint(FD_NET, "client: got signal %d\n", sig);
 386         fio_clients_terminate();
 387 }
 388
 389 static void client_signal_handler(void)
 390 {
 391         struct sigaction act;
 392
 393         memset(&act, 0, sizeof(act));
 394         act.sa_handler = sig_int;
 395         act.sa_flags = SA_RESTART;
 396         sigaction(SIGINT, &act, NULL);
 397
 398         memset(&act, 0, sizeof(act));
 399         act.sa_handler = sig_int;
 400         act.sa_flags = SA_RESTART;
 401         sigaction(SIGTERM, &act, NULL);
 402 }
 403
 404 static int send_client_cmd_line(struct fio_client *client)
 405 {
 406         struct cmd_single_line_pdu *cslp;
 407         struct cmd_line_pdu *clp;
 408         unsigned long offset;
 409         unsigned int *lens;
 410         void *pdu;
 411         size_t mem;
 412         int i, ret;
 413
 414         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 415
 416         lens = malloc(client->argc * sizeof(unsigned int));
 417
 418         /*
 419          * Find out how much mem we need
 420          */
 421         for (i = 0, mem = 0; i < client->argc; i++) {
 422                 lens[i] = strlen(client->argv[i]) + 1;
 423                 mem += lens[i];
 424         }
 425
 426         /*
 427          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 428          */
 429         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 430
 431         pdu = malloc(mem);
 432         clp = pdu;
 433         offset = sizeof(*clp);
 434
 435         for (i = 0; i < client->argc; i++) {
 436                 uint16_t arg_len = lens[i];
 437
 438                 cslp = pdu + offset;
 439                 strcpy((char *) cslp->text, client->argv[i]);
 440                 cslp->len = cpu_to_le16(arg_len);
 441                 offset += sizeof(*cslp) + arg_len;
 442         }
 443
 444         free(lens);
 445         clp->lines = cpu_to_le16(client->argc);
 446         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem, 0);
 447         free(pdu);
 448         return ret;
 449 }
 450
 451 int fio_clients_connect(void)
 452 {
 453         struct fio_client *client;
 454         struct flist_head *entry, *tmp;
 455         int ret;
 456
 457 #ifdef WIN32
 458         WSADATA wsd;
 459         WSAStartup(MAKEWORD(2,2), &wsd);
 460 #endif
 461
 462         dprint(FD_NET, "client: connect all\n");
 463
 464         client_signal_handler();
 465
 466         flist_for_each_safe(entry, tmp, &client_list) {
 467                 client = flist_entry(entry, struct fio_client, list);
 468
 469                 ret = fio_client_connect(client);
 470                 if (ret) {
 471                         remove_client(client);
 472                         continue;
 473                 }
 474
 475                 if (client->argc > 1)
 476                         send_client_cmd_line(client);
 477         }
 478
 479         return !nr_clients;
 480 }
 481
 482 int fio_start_client(struct fio_client *client)
 483 {
 484         dprint(FD_NET, "client: start %s\n", client->hostname);
 485         return fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_RUN, 0, NULL);
 486 }
 487
 488 int fio_start_all_clients(void)
 489 {
 490         struct fio_client *client;
 491         struct flist_head *entry, *tmp;
 492         int ret;
 493
 494         dprint(FD_NET, "client: start all\n");
 495
 496         flist_for_each_safe(entry, tmp, &client_list) {
 497                 client = flist_entry(entry, struct fio_client, list);
 498
 499                 ret = fio_start_client(client);
 500                 if (ret) {
 501                         remove_client(client);
 502                         continue;
 503                 }
 504         }
 505
 506         return flist_empty(&client_list);
 507 }
 508
 509 /*
 510  * Send file contents to server backend. We could use sendfile(), but to remain
 511  * more portable lets just read/write the darn thing.
 512  */
 513 static int __fio_client_send_ini(struct fio_client *client, const char *filename)
 514 {
 515         struct stat sb;
 516         char *p, *buf;
 517         off_t len;
 518         int fd, ret;
 519
 520         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 521
 522         fd = open(filename, O_RDONLY);
 523         if (fd < 0) {
 524                 int ret = -errno;
 525
 526                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 527                 return ret;
 528         }
 529
 530         if (fstat(fd, &sb) < 0) {
 531                 int ret = -errno;
 532
 533                 log_err("fio: job file stat: %s\n", strerror(errno));
 534                 close(fd);
 535                 return ret;
 536         }
 537
 538         buf = malloc(sb.st_size);
 539
 540         len = sb.st_size;
 541         p = buf;
 542         do {
 543                 ret = read(fd, p, len);
 544                 if (ret > 0) {
 545                         len -= ret;
 546                         if (!len)
 547                                 break;
 548                         p += ret;
 549                         continue;
 550                 } else if (!ret)
 551                         break;
 552                 else if (errno == EAGAIN || errno == EINTR)
 553                         continue;
 554         } while (1);
 555
 556         if (len) {
 557                 log_err("fio: failed reading job file %s\n", filename);
 558                 close(fd);
 559                 free(buf);
 560                 return 1;
 561         }
 562
 563         client->sent_job = 1;
 564         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size, 0);
 565         free(buf);
 566         close(fd);
 567         return ret;
 568 }
 569
 570 int fio_client_send_ini(struct fio_client *client, const char *filename)
 571 {
 572         int ret;
 573
 574         ret = __fio_client_send_ini(client, filename);
 575         if (ret) {
 576                 remove_client(client);
 577                 return ret;
 578         }
 579
 580         client->sent_job = 1;
 581         return ret;
 582 }
 583
 584 int fio_clients_send_ini(const char *filename)
 585 {
 586         struct fio_client *client;
 587         struct flist_head *entry, *tmp;
 588
 589         flist_for_each_safe(entry, tmp, &client_list) {
 590                 client = flist_entry(entry, struct fio_client, list);
 591
 592                 fio_client_send_ini(client, filename);
 593         }
 594
 595         return !nr_clients;
 596 }
 597
 598 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 599 {
 600         dst->max_val    = le64_to_cpu(src->max_val);
 601         dst->min_val    = le64_to_cpu(src->min_val);
 602         dst->samples    = le64_to_cpu(src->samples);
 603
 604         /*
 605          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 606          */
 607         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 608         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 609 }
 610
 611 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 612 {
 613         int i, j;
 614
 615         dst->error      = le32_to_cpu(src->error);
 616         dst->groupid    = le32_to_cpu(src->groupid);
 617         dst->pid        = le32_to_cpu(src->pid);
 618         dst->members    = le32_to_cpu(src->members);
 619
 620         for (i = 0; i < 2; i++) {
 621                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 622                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 623                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 624                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 625         }
 626
 627         dst->usr_time           = le64_to_cpu(src->usr_time);
 628         dst->sys_time           = le64_to_cpu(src->sys_time);
 629         dst->ctx                = le64_to_cpu(src->ctx);
 630         dst->minf               = le64_to_cpu(src->minf);
 631         dst->majf               = le64_to_cpu(src->majf);
 632         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 633
 634         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 635                 fio_fp64_t *fps = &src->percentile_list[i];
 636                 fio_fp64_t *fpd = &dst->percentile_list[i];
 637
 638                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 639         }
 640
 641         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 642                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 643                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 644                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 645         }
 646
 647         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 648                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 649                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 650         }
 651
 652         for (i = 0; i < 2; i++)
 653                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 654                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 655
 656         for (i = 0; i < 3; i++) {
 657                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 658                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 659         }
 660
 661         dst->total_submit       = le64_to_cpu(src->total_submit);
 662         dst->total_complete     = le64_to_cpu(src->total_complete);
 663
 664         for (i = 0; i < 2; i++) {
 665                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 666                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 667         }
 668
 669         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 670         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 671         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 672         dst->first_error        = le32_to_cpu(src->first_error);
 673         dst->kb_base            = le32_to_cpu(src->kb_base);
 674 }
 675
 676 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 677 {
 678         int i;
 679
 680         for (i = 0; i < 2; i++) {
 681                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 682                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 683                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 684                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 685                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 686                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 687         }
 688
 689         dst->kb_base    = le32_to_cpu(src->kb_base);
 690         dst->groupid    = le32_to_cpu(src->groupid);
 691 }
 692
 693 static void handle_ts(struct fio_client *client, struct fio_net_cmd *cmd)
 694 {
 695         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 696
 697         show_thread_status(&p->ts, &p->rs);
 698
 699         if (sum_stat_clients == 1)
 700                 return;
 701
 702         sum_thread_stats(&client_ts, &p->ts, sum_stat_nr);
 703         sum_group_stats(&client_gs, &p->rs);
 704
 705         client_ts.members++;
 706         client_ts.groupid = p->ts.groupid;
 707
 708         if (++sum_stat_nr == sum_stat_clients) {
 709                 strcpy(client_ts.name, "All clients");
 710                 show_thread_status(&client_ts, &client_gs);
 711         }
 712 }
 713
 714 static void handle_gs(struct fio_client *client, struct fio_net_cmd *cmd)
 715 {
 716         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 717
 718         show_group_stats(gs);
 719 }
 720
 721 static void handle_text(struct fio_client *client, struct fio_net_cmd *cmd)
 722 {
 723         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 724         const char *buf = (const char *) pdu->buf;
 725         const char *name;
 726         int fio_unused ret;
 727
 728         name = client->name ? client->name : client->hostname;
 729
 730         if (!client->skip_newline)
 731                 fprintf(f_out, "<%s> ", name);
 732         ret = fwrite(buf, pdu->buf_len, 1, f_out);
 733         fflush(f_out);
 734         client->skip_newline = strchr(buf, '\n') == NULL;
 735 }
 736
 737 static void convert_agg(struct disk_util_agg *agg)
 738 {
 739         int i;
 740
 741         for (i = 0; i < 2; i++) {
 742                 agg->ios[i]     = le32_to_cpu(agg->ios[i]);
 743                 agg->merges[i]  = le32_to_cpu(agg->merges[i]);
 744                 agg->sectors[i] = le64_to_cpu(agg->sectors[i]);
 745                 agg->ticks[i]   = le32_to_cpu(agg->ticks[i]);
 746         }
 747
 748         agg->io_ticks           = le32_to_cpu(agg->io_ticks);
 749         agg->time_in_queue      = le32_to_cpu(agg->time_in_queue);
 750         agg->slavecount         = le32_to_cpu(agg->slavecount);
 751         agg->max_util.u.f       = fio_uint64_to_double(__le64_to_cpu(agg->max_util.u.i));
 752 }
 753
 754 static void convert_dus(struct disk_util_stat *dus)
 755 {
 756         int i;
 757
 758         for (i = 0; i < 2; i++) {
 759                 dus->ios[i]     = le32_to_cpu(dus->ios[i]);
 760                 dus->merges[i]  = le32_to_cpu(dus->merges[i]);
 761                 dus->sectors[i] = le64_to_cpu(dus->sectors[i]);
 762                 dus->ticks[i]   = le32_to_cpu(dus->ticks[i]);
 763         }
 764
 765         dus->io_ticks           = le32_to_cpu(dus->io_ticks);
 766         dus->time_in_queue      = le32_to_cpu(dus->time_in_queue);
 767         dus->msec               = le64_to_cpu(dus->msec);
 768 }
 769
 770 static void handle_du(struct fio_client *client, struct fio_net_cmd *cmd)
 771 {
 772         struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 773
 774         if (!client->disk_stats_shown) {
 775                 client->disk_stats_shown = 1;
 776                 log_info("\nDisk stats (read/write):\n");
 777         }
 778
 779         print_disk_util(&du->dus, &du->agg, terse_output);
 780 }
 781
 782 static void convert_jobs_eta(struct jobs_eta *je)
 783 {
 784         int i;
 785
 786         je->nr_running          = le32_to_cpu(je->nr_running);
 787         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 788         je->nr_pending          = le32_to_cpu(je->nr_pending);
 789         je->files_open          = le32_to_cpu(je->files_open);
 790
 791         for (i = 0; i < 2; i++) {
 792                 je->m_rate[i]           = le32_to_cpu(je->m_rate[i]);
 793                 je->t_rate[i]           = le32_to_cpu(je->t_rate[i]);
 794                 je->m_iops[i]           = le32_to_cpu(je->m_iops[i]);
 795                 je->t_iops[i]           = le32_to_cpu(je->t_iops[i]);
 796                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 797                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 798         }
 799
 800         je->elapsed_sec         = le64_to_cpu(je->elapsed_sec);
 801         je->eta_sec             = le64_to_cpu(je->eta_sec);
 802         je->nr_threads          = le32_to_cpu(je->nr_threads);
 803 }
 804
 805 void fio_client_sum_jobs_eta(struct jobs_eta *dst, struct jobs_eta *je)
 806 {
 807         int i;
 808
 809         dst->nr_running         += je->nr_running;
 810         dst->nr_ramp            += je->nr_ramp;
 811         dst->nr_pending         += je->nr_pending;
 812         dst->files_open         += je->files_open;
 813
 814         for (i = 0; i < 2; i++) {
 815                 dst->m_rate[i]  += je->m_rate[i];
 816                 dst->t_rate[i]  += je->t_rate[i];
 817                 dst->m_iops[i]  += je->m_iops[i];
 818                 dst->t_iops[i]  += je->t_iops[i];
 819                 dst->rate[i]    += je->rate[i];
 820                 dst->iops[i]    += je->iops[i];
 821         }
 822
 823         dst->elapsed_sec        += je->elapsed_sec;
 824
 825         if (je->eta_sec > dst->eta_sec)
 826                 dst->eta_sec = je->eta_sec;
 827
 828         dst->nr_threads         += je->nr_threads;
 829         /* we need to handle je->run_str too ... */
 830 }
 831
 832 void fio_client_dec_jobs_eta(struct client_eta *eta, client_eta_op eta_fn)
 833 {
 834         if (!--eta->pending) {
 835                 eta_fn(&eta->eta);
 836                 free(eta);
 837         }
 838 }
 839
 840 static void remove_reply_cmd(struct fio_client *client, struct fio_net_cmd *cmd)
 841 {
 842         struct fio_net_int_cmd *icmd = NULL;
 843         struct flist_head *entry;
 844
 845         flist_for_each(entry, &client->cmd_list) {
 846                 icmd = flist_entry(entry, struct fio_net_int_cmd, list);
 847
 848                 if (cmd->tag == (uintptr_t) icmd)
 849                         break;
 850
 851                 icmd = NULL;
 852         }
 853
 854         if (!icmd) {
 855                 log_err("fio: client: unable to find matching tag\n");
 856                 return;
 857         }
 858
 859         flist_del(&icmd->list);
 860         cmd->tag = icmd->saved_tag;
 861         free(icmd);
 862 }
 863
 864 static void handle_eta(struct fio_client *client, struct fio_net_cmd *cmd)
 865 {
 866         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 867         struct client_eta *eta = (struct client_eta *) (uintptr_t) cmd->tag;
 868
 869         dprint(FD_NET, "client: got eta tag %p, %d\n", eta, eta->pending);
 870
 871         assert(client->eta_in_flight == eta);
 872
 873         client->eta_in_flight = NULL;
 874         flist_del_init(&client->eta_list);
 875
 876         if (client->ops->jobs_eta)
 877                 client->ops->jobs_eta(client, je);
 878
 879         fio_client_sum_jobs_eta(&eta->eta, je);
 880         fio_client_dec_jobs_eta(eta, client->ops->eta);
 881 }
 882
 883 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 884 {
 885         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 886         const char *os, *arch;
 887         char bit[16];
 888
 889         os = fio_get_os_string(probe->os);
 890         if (!os)
 891                 os = "unknown";
 892
 893         arch = fio_get_arch_string(probe->arch);
 894         if (!arch)
 895                 os = "unknown";
 896
 897         sprintf(bit, "%d-bit", probe->bpp * 8);
 898
 899         log_info("hostname=%s, be=%u, %s, os=%s, arch=%s, fio=%u.%u.%u\n",
 900                 probe->hostname, probe->bigendian, bit, os, arch,
 901                 probe->fio_major, probe->fio_minor, probe->fio_patch);
 902
 903         if (!client->name)
 904                 client->name = strdup((char *) probe->hostname);
 905 }
 906
 907 static void handle_start(struct fio_client *client, struct fio_net_cmd *cmd)
 908 {
 909         struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
 910
 911         client->state = Client_started;
 912         client->jobs = pdu->jobs;
 913 }
 914
 915 static void handle_stop(struct fio_client *client, struct fio_net_cmd *cmd)
 916 {
 917         if (client->error)
 918                 log_info("client <%s>: exited with error %d\n", client->hostname, client->error);
 919 }
 920
 921 static void convert_stop(struct fio_net_cmd *cmd)
 922 {
 923         struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
 924
 925         pdu->error = le32_to_cpu(pdu->error);
 926 }
 927
 928 static void convert_text(struct fio_net_cmd *cmd)
 929 {
 930         struct cmd_text_pdu *pdu = (struct cmd_text_pdu *) cmd->payload;
 931
 932         pdu->level      = le32_to_cpu(pdu->level);
 933         pdu->buf_len    = le32_to_cpu(pdu->buf_len);
 934         pdu->log_sec    = le64_to_cpu(pdu->log_sec);
 935         pdu->log_usec   = le64_to_cpu(pdu->log_usec);
 936 }
 937
 938 int fio_handle_client(struct fio_client *client)
 939 {
 940         struct client_ops *ops = client->ops;
 941         struct fio_net_cmd *cmd;
 942
 943         dprint(FD_NET, "client: handle %s\n", client->hostname);
 944
 945         cmd = fio_net_recv_cmd(client->fd);
 946         if (!cmd)
 947                 return 0;
 948
 949         dprint(FD_NET, "client: got cmd op %s from %s (pdu=%u)\n",
 950                 fio_server_op(cmd->opcode), client->hostname, cmd->pdu_len);
 951
 952         switch (cmd->opcode) {
 953         case FIO_NET_CMD_QUIT:
 954                 if (ops->quit)
 955                         ops->quit(client);
 956                 remove_client(client);
 957                 free(cmd);
 958                 break;
 959         case FIO_NET_CMD_TEXT:
 960                 convert_text(cmd);
 961                 ops->text_op(client, cmd);
 962                 free(cmd);
 963                 break;
 964         case FIO_NET_CMD_DU: {
 965                 struct cmd_du_pdu *du = (struct cmd_du_pdu *) cmd->payload;
 966
 967                 convert_dus(&du->dus);
 968                 convert_agg(&du->agg);
 969
 970                 ops->disk_util(client, cmd);
 971                 free(cmd);
 972                 break;
 973                 }
 974         case FIO_NET_CMD_TS: {
 975                 struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 976
 977                 convert_ts(&p->ts, &p->ts);
 978                 convert_gs(&p->rs, &p->rs);
 979
 980                 ops->thread_status(client, cmd);
 981                 free(cmd);
 982                 break;
 983                 }
 984         case FIO_NET_CMD_GS: {
 985                 struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 986
 987                 convert_gs(gs, gs);
 988
 989                 ops->group_stats(client, cmd);
 990                 free(cmd);
 991                 break;
 992                 }
 993         case FIO_NET_CMD_ETA: {
 994                 struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 995
 996                 remove_reply_cmd(client, cmd);
 997                 convert_jobs_eta(je);
 998                 handle_eta(client, cmd);
 999                 free(cmd);
1000                 break;
1001                 }
1002         case FIO_NET_CMD_PROBE:
1003                 remove_reply_cmd(client, cmd);
1004                 ops->probe(client, cmd);
1005                 free(cmd);
1006                 break;
1007         case FIO_NET_CMD_SERVER_START:
1008                 client->state = Client_running;
1009                 if (ops->job_start)
1010                         ops->job_start(client, cmd);
1011                 free(cmd);
1012                 break;
1013         case FIO_NET_CMD_START: {
1014                 struct cmd_start_pdu *pdu = (struct cmd_start_pdu *) cmd->payload;
1015
1016                 pdu->jobs = le32_to_cpu(pdu->jobs);
1017                 ops->start(client, cmd);
1018                 free(cmd);
1019                 break;
1020                 }
1021         case FIO_NET_CMD_STOP: {
1022                 struct cmd_end_pdu *pdu = (struct cmd_end_pdu *) cmd->payload;
1023
1024                 convert_stop(cmd);
1025                 client->state = Client_stopped;
1026                 client->error = pdu->error;
1027                 ops->stop(client, cmd);
1028                 free(cmd);
1029                 break;
1030                 }
1031         case FIO_NET_CMD_ADD_JOB:
1032                 if (ops->add_job)
1033                         ops->add_job(client, cmd);
1034                 free(cmd);
1035                 break;
1036         default:
1037                 log_err("fio: unknown client op: %s\n", fio_server_op(cmd->opcode));
1038                 free(cmd);
1039                 break;
1040         }
1041
1042         return 1;
1043 }
1044
1045 static void request_client_etas(struct client_ops *ops)
1046 {
1047         struct fio_client *client;
1048         struct flist_head *entry;
1049         struct client_eta *eta;
1050         int skipped = 0;
1051
1052         dprint(FD_NET, "client: request eta (%d)\n", nr_clients);
1053
1054         eta = malloc(sizeof(*eta));
1055         memset(&eta->eta, 0, sizeof(eta->eta));
1056         eta->pending = nr_clients;
1057
1058         flist_for_each(entry, &client_list) {
1059                 client = flist_entry(entry, struct fio_client, list);
1060
1061                 if (!flist_empty(&client->eta_list)) {
1062                         skipped++;
1063                         continue;
1064                 }
1065                 if (client->state != Client_running)
1066                         continue;
1067
1068                 assert(!client->eta_in_flight);
1069                 flist_add_tail(&client->eta_list, &eta_list);
1070                 client->eta_in_flight = eta;
1071                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_SEND_ETA,
1072                                         (uintptr_t) eta, &client->cmd_list);
1073         }
1074
1075         while (skipped--)
1076                 fio_client_dec_jobs_eta(eta, ops->eta);
1077
1078         dprint(FD_NET, "client: requested eta tag %p\n", eta);
1079 }
1080
1081 static int client_check_cmd_timeout(struct fio_client *client,
1082                                     struct timeval *now)
1083 {
1084         struct fio_net_int_cmd *cmd;
1085         struct flist_head *entry, *tmp;
1086         int ret = 0;
1087
1088         flist_for_each_safe(entry, tmp, &client->cmd_list) {
1089                 cmd = flist_entry(entry, struct fio_net_int_cmd, list);
1090
1091                 if (mtime_since(&cmd->tv, now) < FIO_NET_CLIENT_TIMEOUT)
1092                         continue;
1093
1094                 log_err("fio: client %s, timeout on cmd %s\n", client->hostname,
1095                                                 fio_server_op(cmd->cmd.opcode));
1096                 flist_del(&cmd->list);
1097                 free(cmd);
1098                 ret = 1;
1099         }
1100
1101         return flist_empty(&client->cmd_list) && ret;
1102 }
1103
1104 static int fio_check_clients_timed_out(void)
1105 {
1106         struct fio_client *client;
1107         struct flist_head *entry, *tmp;
1108         struct timeval tv;
1109         int ret = 0;
1110
1111         gettimeofday(&tv, NULL);
1112
1113         flist_for_each_safe(entry, tmp, &client_list) {
1114                 client = flist_entry(entry, struct fio_client, list);
1115
1116                 if (flist_empty(&client->cmd_list))
1117                         continue;
1118
1119                 if (!client_check_cmd_timeout(client, &tv))
1120                         continue;
1121
1122                 if (client->ops->timed_out)
1123                         client->ops->timed_out(client);
1124                 else
1125                         log_err("fio: client %s timed out\n", client->hostname);
1126
1127                 remove_client(client);
1128                 ret = 1;
1129         }
1130
1131         return ret;
1132 }
1133
1134 int fio_handle_clients(struct client_ops *ops)
1135 {
1136         struct pollfd *pfds;
1137         int i, ret = 0, retval = 0;
1138
1139         gettimeofday(&eta_tv, NULL);
1140
1141         pfds = malloc(nr_clients * sizeof(struct pollfd));
1142
1143         sum_stat_clients = nr_clients;
1144         init_thread_stat(&client_ts);
1145         init_group_run_stat(&client_gs);
1146
1147         while (!exit_backend && nr_clients) {
1148                 struct flist_head *entry, *tmp;
1149                 struct fio_client *client;
1150
1151                 i = 0;
1152                 flist_for_each_safe(entry, tmp, &client_list) {
1153                         client = flist_entry(entry, struct fio_client, list);
1154
1155                         if (!client->sent_job && !client->ops->stay_connected &&
1156                             flist_empty(&client->cmd_list)) {
1157                                 remove_client(client);
1158                                 continue;
1159                         }
1160
1161                         pfds[i].fd = client->fd;
1162                         pfds[i].events = POLLIN;
1163                         i++;
1164                 }
1165
1166                 if (!nr_clients)
1167                         break;
1168
1169                 assert(i == nr_clients);
1170
1171                 do {
1172                         struct timeval tv;
1173
1174                         gettimeofday(&tv, NULL);
1175                         if (mtime_since(&eta_tv, &tv) >= ops->eta_msec) {
1176                                 request_client_etas(ops);
1177                                 memcpy(&eta_tv, &tv, sizeof(tv));
1178
1179                                 if (fio_check_clients_timed_out())
1180                                         break;
1181                         }
1182
1183                         ret = poll(pfds, nr_clients, 100);
1184                         if (ret < 0) {
1185                                 if (errno == EINTR)
1186                                         continue;
1187                                 log_err("fio: poll clients: %s\n", strerror(errno));
1188                                 break;
1189                         } else if (!ret)
1190                                 continue;
1191                 } while (ret <= 0);
1192
1193                 for (i = 0; i < nr_clients; i++) {
1194                         if (!(pfds[i].revents & POLLIN))
1195                                 continue;
1196
1197                         client = find_client_by_fd(pfds[i].fd);
1198                         if (!client) {
1199                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
1200                                 continue;
1201                         }
1202                         if (!fio_handle_client(client)) {
1203                                 log_info("client: host=%s disconnected\n",
1204                                                 client->hostname);
1205                                 remove_client(client);
1206                                 retval = 1;
1207                         } else if (client->error)
1208                                 retval = 1;
1209                         fio_put_client(client);
1210                 }
1211         }
1212
1213         free(pfds);
1214         return retval;
1215 }