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 fio_client {
  24         struct flist_head list;
  25         struct flist_head hash_list;
  26         struct sockaddr_in addr;
  27         struct sockaddr_un addr_un;
  28         char *hostname;
  29         int port;
  30         int fd;
  31
  32         char *name;
  33
  34         int state;
  35         int skip_newline;
  36         int is_sock;
  37
  38         uint16_t argc;
  39         char **argv;
  40 };
  41
  42 enum {
  43         Client_created          = 0,
  44         Client_connected        = 1,
  45         Client_started          = 2,
  46         Client_stopped          = 3,
  47         Client_exited           = 4,
  48 };
  49
  50 static FLIST_HEAD(client_list);
  51
  52 #define FIO_CLIENT_HASH_BITS    7
  53 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  54 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  55 static struct flist_head client_hash[FIO_CLIENT_HASH_SZ];
  56
  57 static int handle_client(struct fio_client *client);
  58
  59 static void fio_client_add_hash(struct fio_client *client)
  60 {
  61         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  62
  63         bucket &= FIO_CLIENT_HASH_MASK;
  64         flist_add(&client->hash_list, &client_hash[bucket]);
  65 }
  66
  67 static void fio_client_remove_hash(struct fio_client *client)
  68 {
  69         if (!flist_empty(&client->hash_list))
  70                 flist_del_init(&client->hash_list);
  71 }
  72
  73 static void fio_init fio_client_hash_init(void)
  74 {
  75         int i;
  76
  77         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++)
  78                 INIT_FLIST_HEAD(&client_hash[i]);
  79 }
  80
  81 static struct fio_client *find_client_by_fd(int fd)
  82 {
  83         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  84         struct fio_client *client;
  85         struct flist_head *entry;
  86
  87         flist_for_each(entry, &client_hash[bucket]) {
  88                 client = flist_entry(entry, struct fio_client, hash_list);
  89
  90                 if (client->fd == fd)
  91                         return client;
  92         }
  93
  94         return NULL;
  95 }
  96
  97 static void remove_client(struct fio_client *client)
  98 {
  99         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 100         flist_del(&client->list);
 101
 102         fio_client_remove_hash(client);
 103
 104         free(client->hostname);
 105         if (client->argv)
 106                 free(client->argv);
 107         if (client->name)
 108                 free(client->name);
 109
 110         free(client);
 111         nr_clients--;
 112 }
 113
 114 static void __fio_client_add_cmd_option(struct fio_client *client,
 115                                         const char *opt)
 116 {
 117         int index;
 118
 119         index = client->argc++;
 120         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 121         client->argv[index] = strdup(opt);
 122         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 123 }
 124
 125 void fio_client_add_cmd_option(void *cookie, const char *opt)
 126 {
 127         struct fio_client *client = cookie;
 128
 129         if (!client || !opt)
 130                 return;
 131
 132         __fio_client_add_cmd_option(client, opt);
 133 }
 134
 135 int fio_client_add(const char *hostname, void **cookie)
 136 {
 137         struct fio_client *client;
 138
 139         client = malloc(sizeof(*client));
 140         memset(client, 0, sizeof(*client));
 141
 142         INIT_FLIST_HEAD(&client->list);
 143         INIT_FLIST_HEAD(&client->hash_list);
 144
 145         if (fio_server_parse_string(hostname, &client->hostname,
 146                                         &client->is_sock, &client->port,
 147                                         &client->addr.sin_addr))
 148                 return -1;
 149
 150         client->fd = -1;
 151
 152         __fio_client_add_cmd_option(client, "fio");
 153
 154         flist_add(&client->list, &client_list);
 155         nr_clients++;
 156         dprint(FD_NET, "client: added <%s>\n", client->hostname);
 157         *cookie = client;
 158         return 0;
 159 }
 160
 161 static int fio_client_connect_ip(struct fio_client *client)
 162 {
 163         int fd;
 164
 165         client->addr.sin_family = AF_INET;
 166         client->addr.sin_port = htons(client->port);
 167
 168         fd = socket(AF_INET, SOCK_STREAM, 0);
 169         if (fd < 0) {
 170                 log_err("fio: socket: %s\n", strerror(errno));
 171                 return -1;
 172         }
 173
 174         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 175                 log_err("fio: connect: %s\n", strerror(errno));
 176                 log_err("fio: failed to connect to %s:%u\n", client->hostname,
 177                                                                 client->port);
 178                 close(fd);
 179                 return -1;
 180         }
 181
 182         return fd;
 183 }
 184
 185 static int fio_client_connect_sock(struct fio_client *client)
 186 {
 187         struct sockaddr_un *addr = &client->addr_un;
 188         fio_socklen_t len;
 189         int fd;
 190
 191         memset(addr, 0, sizeof(*addr));
 192         addr->sun_family = AF_UNIX;
 193         strcpy(addr->sun_path, client->hostname);
 194
 195         fd = socket(AF_UNIX, SOCK_STREAM, 0);
 196         if (fd < 0) {
 197                 log_err("fio: socket: %s\n", strerror(errno));
 198                 return -1;
 199         }
 200
 201         len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
 202         if (connect(fd, (struct sockaddr *) addr, len) < 0) {
 203                 log_err("fio: connect; %s\n", strerror(errno));
 204                 close(fd);
 205                 return -1;
 206         }
 207
 208         return fd;
 209 }
 210
 211 static int fio_client_connect(struct fio_client *client)
 212 {
 213         int fd;
 214
 215         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 216
 217         if (client->is_sock)
 218                 fd = fio_client_connect_sock(client);
 219         else
 220                 fd = fio_client_connect_ip(client);
 221
 222         if (fd < 0)
 223                 return 1;
 224
 225         client->fd = fd;
 226         fio_client_add_hash(client);
 227         client->state = Client_connected;
 228         return 0;
 229 }
 230
 231 void fio_clients_terminate(void)
 232 {
 233         struct flist_head *entry;
 234         struct fio_client *client;
 235
 236         dprint(FD_NET, "client: terminate clients\n");
 237
 238         flist_for_each(entry, &client_list) {
 239                 client = flist_entry(entry, struct fio_client, list);
 240
 241                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
 242         }
 243 }
 244
 245 static void sig_int(int sig)
 246 {
 247         dprint(FD_NET, "client: got signal %d\n", sig);
 248         fio_clients_terminate();
 249 }
 250
 251 static void client_signal_handler(void)
 252 {
 253         struct sigaction act;
 254
 255         memset(&act, 0, sizeof(act));
 256         act.sa_handler = sig_int;
 257         act.sa_flags = SA_RESTART;
 258         sigaction(SIGINT, &act, NULL);
 259
 260         memset(&act, 0, sizeof(act));
 261         act.sa_handler = sig_int;
 262         act.sa_flags = SA_RESTART;
 263         sigaction(SIGTERM, &act, NULL);
 264 }
 265
 266 static void probe_client(struct fio_client *client)
 267 {
 268         dprint(FD_NET, "client: send probe\n");
 269
 270         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
 271         handle_client(client);
 272 }
 273
 274 static int send_client_cmd_line(struct fio_client *client)
 275 {
 276         struct cmd_single_line_pdu *cslp;
 277         struct cmd_line_pdu *clp;
 278         unsigned long offset;
 279         void *pdu;
 280         size_t mem;
 281         int i, ret;
 282
 283         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 284
 285         /*
 286          * Find out how much mem we need
 287          */
 288         for (i = 0, mem = 0; i < client->argc; i++)
 289                 mem += strlen(client->argv[i]) + 1;
 290
 291         /*
 292          * We need one cmd_line_pdu, and argc number of cmd_single_line_pdu
 293          */
 294         mem += sizeof(*clp) + (client->argc * sizeof(*cslp));
 295
 296         pdu = malloc(mem);
 297         clp = pdu;
 298         offset = sizeof(*clp);
 299
 300         for (i = 0; i < client->argc; i++) {
 301                 uint16_t arg_len = strlen(client->argv[i]) + 1;
 302
 303                 cslp = pdu + offset;
 304                 strcpy((char *) cslp->text, client->argv[i]);
 305                 cslp->len = cpu_to_le16(arg_len);
 306                 offset += sizeof(*cslp) + arg_len;
 307         }
 308
 309         clp->lines = cpu_to_le16(client->argc);
 310         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, mem);
 311         free(pdu);
 312         return ret;
 313 }
 314
 315 int fio_clients_connect(void)
 316 {
 317         struct fio_client *client;
 318         struct flist_head *entry, *tmp;
 319         int ret;
 320
 321         dprint(FD_NET, "client: connect all\n");
 322
 323         client_signal_handler();
 324
 325         flist_for_each_safe(entry, tmp, &client_list) {
 326                 client = flist_entry(entry, struct fio_client, list);
 327
 328                 ret = fio_client_connect(client);
 329                 if (ret) {
 330                         remove_client(client);
 331                         continue;
 332                 }
 333
 334                 probe_client(client);
 335
 336                 if (client->argc > 1)
 337                         send_client_cmd_line(client);
 338         }
 339
 340         return !nr_clients;
 341 }
 342
 343 /*
 344  * Send file contents to server backend. We could use sendfile(), but to remain
 345  * more portable lets just read/write the darn thing.
 346  */
 347 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 348 {
 349         struct stat sb;
 350         char *p, *buf;
 351         off_t len;
 352         int fd, ret;
 353
 354         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 355
 356         fd = open(filename, O_RDONLY);
 357         if (fd < 0) {
 358                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 359                 return 1;
 360         }
 361
 362         if (fstat(fd, &sb) < 0) {
 363                 log_err("fio: job file stat: %s\n", strerror(errno));
 364                 close(fd);
 365                 return 1;
 366         }
 367
 368         buf = malloc(sb.st_size);
 369
 370         len = sb.st_size;
 371         p = buf;
 372         do {
 373                 ret = read(fd, p, len);
 374                 if (ret > 0) {
 375                         len -= ret;
 376                         if (!len)
 377                                 break;
 378                         p += ret;
 379                         continue;
 380                 } else if (!ret)
 381                         break;
 382                 else if (errno == EAGAIN || errno == EINTR)
 383                         continue;
 384         } while (1);
 385
 386         if (len) {
 387                 log_err("fio: failed reading job file %s\n", filename);
 388                 close(fd);
 389                 free(buf);
 390                 return 1;
 391         }
 392
 393         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
 394         free(buf);
 395         close(fd);
 396         return ret;
 397 }
 398
 399 int fio_clients_send_ini(const char *filename)
 400 {
 401         struct fio_client *client;
 402         struct flist_head *entry, *tmp;
 403
 404         flist_for_each_safe(entry, tmp, &client_list) {
 405                 client = flist_entry(entry, struct fio_client, list);
 406
 407                 if (fio_client_send_ini(client, filename))
 408                         remove_client(client);
 409         }
 410
 411         return !nr_clients;
 412 }
 413
 414 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 415 {
 416         dst->max_val    = le64_to_cpu(src->max_val);
 417         dst->min_val    = le64_to_cpu(src->min_val);
 418         dst->samples    = le64_to_cpu(src->samples);
 419
 420         /*
 421          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 422          */
 423         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 424         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 425 }
 426
 427 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 428 {
 429         int i, j;
 430
 431         dst->error      = le32_to_cpu(src->error);
 432         dst->groupid    = le32_to_cpu(src->groupid);
 433         dst->pid        = le32_to_cpu(src->pid);
 434         dst->members    = le32_to_cpu(src->members);
 435
 436         for (i = 0; i < 2; i++) {
 437                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 438                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 439                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 440                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 441         }
 442
 443         dst->usr_time           = le64_to_cpu(src->usr_time);
 444         dst->sys_time           = le64_to_cpu(src->sys_time);
 445         dst->ctx                = le64_to_cpu(src->ctx);
 446         dst->minf               = le64_to_cpu(src->minf);
 447         dst->majf               = le64_to_cpu(src->majf);
 448         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 449
 450         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 451                 fio_fp64_t *fps = &src->percentile_list[i];
 452                 fio_fp64_t *fpd = &dst->percentile_list[i];
 453
 454                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 455         }
 456
 457         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 458                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 459                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 460                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 461         }
 462
 463         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 464                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 465                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 466         }
 467
 468         for (i = 0; i < 2; i++)
 469                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 470                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 471
 472         for (i = 0; i < 3; i++) {
 473                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 474                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 475         }
 476
 477         dst->total_submit       = le64_to_cpu(src->total_submit);
 478         dst->total_complete     = le64_to_cpu(src->total_complete);
 479
 480         for (i = 0; i < 2; i++) {
 481                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 482                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 483         }
 484
 485         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 486         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 487         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 488         dst->first_error        = le32_to_cpu(src->first_error);
 489         dst->kb_base            = le32_to_cpu(src->kb_base);
 490 }
 491
 492 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 493 {
 494         int i;
 495
 496         for (i = 0; i < 2; i++) {
 497                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 498                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 499                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 500                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 501                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 502                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 503         }
 504
 505         dst->kb_base    = le32_to_cpu(src->kb_base);
 506         dst->groupid    = le32_to_cpu(src->groupid);
 507 }
 508
 509 static void handle_ts(struct fio_net_cmd *cmd)
 510 {
 511         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 512
 513         convert_ts(&p->ts, &p->ts);
 514         convert_gs(&p->rs, &p->rs);
 515
 516         show_thread_status(&p->ts, &p->rs);
 517 }
 518
 519 static void handle_gs(struct fio_net_cmd *cmd)
 520 {
 521         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 522
 523         convert_gs(gs, gs);
 524         show_group_stats(gs);
 525 }
 526
 527 static void handle_eta(struct fio_net_cmd *cmd)
 528 {
 529         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 530         int i;
 531
 532         je->nr_running          = le32_to_cpu(je->nr_running);
 533         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 534         je->nr_pending          = le32_to_cpu(je->nr_pending);
 535         je->files_open          = le32_to_cpu(je->files_open);
 536         je->m_rate              = le32_to_cpu(je->m_rate);
 537         je->t_rate              = le32_to_cpu(je->t_rate);
 538         je->m_iops              = le32_to_cpu(je->m_iops);
 539         je->t_iops              = le32_to_cpu(je->t_iops);
 540
 541         for (i = 0; i < 2; i++) {
 542                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 543                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 544         }
 545
 546         je->elapsed_sec         = le32_to_cpu(je->nr_running);
 547         je->eta_sec             = le64_to_cpu(je->eta_sec);
 548
 549         display_thread_status(je);
 550 }
 551
 552 static void handle_probe(struct fio_client *client, struct fio_net_cmd *cmd)
 553 {
 554         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 555         const char *os, *arch;
 556
 557         os = fio_get_os_string(probe->os);
 558         if (!os)
 559                 os = "unknown";
 560
 561         arch = fio_get_arch_string(probe->arch);
 562         if (!arch)
 563                 os = "unknown";
 564
 565         log_info("hostname=%s, be=%u, os=%s, arch=%s, fio=%u.%u.%u\n",
 566                 probe->hostname, probe->bigendian, os, arch, probe->fio_major,
 567                 probe->fio_minor, probe->fio_patch);
 568
 569         if (!client->name)
 570                 client->name = strdup((char *) probe->hostname);
 571 }
 572
 573 static int handle_client(struct fio_client *client)
 574 {
 575         struct fio_net_cmd *cmd;
 576
 577         dprint(FD_NET, "client: handle %s\n", client->hostname);
 578
 579         cmd = fio_net_recv_cmd(client->fd);
 580         if (!cmd)
 581                 return 0;
 582
 583         dprint(FD_NET, "client: got cmd op %d from %s\n",
 584                                         cmd->opcode, client->hostname);
 585
 586         switch (cmd->opcode) {
 587         case FIO_NET_CMD_QUIT:
 588                 remove_client(client);
 589                 free(cmd);
 590                 break;
 591         case FIO_NET_CMD_TEXT: {
 592                 const char *buf = (const char *) cmd->payload;
 593                 const char *name;
 594                 int fio_unused ret;
 595
 596                 name = client->name ? client->name : client->hostname;
 597
 598                 if (!client->skip_newline)
 599                         fprintf(f_out, "<%s> ", name);
 600                 ret = fwrite(buf, cmd->pdu_len, 1, f_out);
 601                 fflush(f_out);
 602                 client->skip_newline = strchr(buf, '\n') == NULL;
 603                 free(cmd);
 604                 break;
 605                 }
 606         case FIO_NET_CMD_TS:
 607                 handle_ts(cmd);
 608                 free(cmd);
 609                 break;
 610         case FIO_NET_CMD_GS:
 611                 handle_gs(cmd);
 612                 free(cmd);
 613                 break;
 614         case FIO_NET_CMD_ETA:
 615                 handle_eta(cmd);
 616                 free(cmd);
 617                 break;
 618         case FIO_NET_CMD_PROBE:
 619                 handle_probe(client, cmd);
 620                 free(cmd);
 621                 break;
 622         case FIO_NET_CMD_START:
 623                 client->state = Client_started;
 624                 free(cmd);
 625                 break;
 626         case FIO_NET_CMD_STOP:
 627                 client->state = Client_stopped;
 628                 free(cmd);
 629                 break;
 630         default:
 631                 log_err("fio: unknown client op: %d\n", cmd->opcode);
 632                 free(cmd);
 633                 break;
 634         }
 635
 636         return 1;
 637 }
 638
 639 int fio_handle_clients(void)
 640 {
 641         struct fio_client *client;
 642         struct flist_head *entry;
 643         struct pollfd *pfds;
 644         int i, ret = 0;
 645
 646         pfds = malloc(nr_clients * sizeof(struct pollfd));
 647
 648         while (!exit_backend && nr_clients) {
 649                 i = 0;
 650                 flist_for_each(entry, &client_list) {
 651                         client = flist_entry(entry, struct fio_client, list);
 652
 653                         pfds[i].fd = client->fd;
 654                         pfds[i].events = POLLIN;
 655                         i++;
 656                 }
 657
 658                 assert(i == nr_clients);
 659
 660                 do {
 661                         ret = poll(pfds, nr_clients, 100);
 662                         if (ret < 0) {
 663                                 if (errno == EINTR)
 664                                         continue;
 665                                 log_err("fio: poll clients: %s\n", strerror(errno));
 666                                 break;
 667                         } else if (!ret)
 668                                 continue;
 669                 } while (ret <= 0);
 670
 671                 for (i = 0; i < nr_clients; i++) {
 672                         if (!(pfds[i].revents & POLLIN))
 673                                 continue;
 674
 675                         client = find_client_by_fd(pfds[i].fd);
 676                         if (!client) {
 677                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
 678                                 continue;
 679                         }
 680                         if (!handle_client(client)) {
 681                                 log_info("client: host=%s disconnected\n",
 682                                                 client->hostname);
 683                                 remove_client(client);
 684                         }
 685                 }
 686         }
 687
 688         free(pfds);
 689         return 0;
 690 }