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 <netinet/in.h>
  13 #include <arpa/inet.h>
  14 #include <netdb.h>
  15 #include <signal.h>
  16
  17 #include "fio.h"
  18 #include "server.h"
  19 #include "crc/crc32.h"
  20 #include "flist.h"
  21
  22 struct fio_client {
  23         struct flist_head list;
  24         struct sockaddr_in addr;
  25         char *hostname;
  26         int fd;
  27
  28         int state;
  29         int skip_newline;
  30
  31         uint16_t argc;
  32         char **argv;
  33 };
  34
  35 enum {
  36         Client_created          = 0,
  37         Client_connected        = 1,
  38         Client_started          = 2,
  39         Client_stopped          = 3,
  40         Client_exited           = 4,
  41 };
  42
  43 static FLIST_HEAD(client_list);
  44
  45 static int handle_client(struct fio_client *client);
  46
  47 static struct fio_client *find_client_by_fd(int fd)
  48 {
  49         struct fio_client *client;
  50         struct flist_head *entry;
  51
  52         flist_for_each(entry, &client_list) {
  53                 client = flist_entry(entry, struct fio_client, list);
  54
  55                 if (client->fd == fd)
  56                         return client;
  57         }
  58
  59         return NULL;
  60 }
  61
  62 static struct fio_client *find_client_by_name(const char *name)
  63 {
  64         struct fio_client *client;
  65         struct flist_head *entry;
  66
  67         flist_for_each(entry, &client_list) {
  68                 client = flist_entry(entry, struct fio_client, list);
  69
  70                 if (!strcmp(name, client->hostname))
  71                         return client;
  72         }
  73
  74         return NULL;
  75 }
  76
  77 static void remove_client(struct fio_client *client)
  78 {
  79         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
  80         flist_del(&client->list);
  81         nr_clients--;
  82
  83         free(client->hostname);
  84         if (client->argv)
  85                 free(client->argv);
  86
  87         free(client);
  88 }
  89
  90 static int __fio_client_add_cmd_option(struct fio_client *client,
  91                                        const char *opt)
  92 {
  93         int index;
  94
  95         if (client->argc == FIO_NET_CMD_JOBLINE_ARGV) {
  96                 log_err("fio: max cmd line number reached.\n");
  97                 log_err("fio: cmd line <%s> has been ignored.\n", opt);
  98                 return 1;
  99         }
 100
 101         index = client->argc++;
 102         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 103         client->argv[index] = strdup(opt);
 104         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 105         return 0;
 106 }
 107
 108 int fio_client_add_cmd_option(const char *hostname, const char *opt)
 109 {
 110         struct fio_client *client;
 111
 112         if (!hostname || !opt)
 113                 return 0;
 114
 115         client = find_client_by_name(hostname);
 116         if (!client) {
 117                 log_err("fio: unknown client %s\n", hostname);
 118                 return 1;
 119         }
 120
 121         return __fio_client_add_cmd_option(client, opt);
 122 }
 123
 124 void fio_client_add(const char *hostname)
 125 {
 126         struct fio_client *client;
 127
 128         dprint(FD_NET, "client: added  <%s>\n", hostname);
 129         client = malloc(sizeof(*client));
 130         memset(client, 0, sizeof(*client));
 131
 132         client->hostname = strdup(hostname);
 133         client->fd = -1;
 134
 135         __fio_client_add_cmd_option(client, "fio");
 136
 137         flist_add(&client->list, &client_list);
 138         nr_clients++;
 139 }
 140
 141 static int fio_client_connect(struct fio_client *client)
 142 {
 143         int fd;
 144
 145         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 146
 147         memset(&client->addr, 0, sizeof(client->addr));
 148         client->addr.sin_family = AF_INET;
 149         client->addr.sin_port = htons(fio_net_port);
 150
 151         if (inet_aton(client->hostname, &client->addr.sin_addr) != 1) {
 152                 struct hostent *hent;
 153
 154                 hent = gethostbyname(client->hostname);
 155                 if (!hent) {
 156                         log_err("fio: gethostbyname: %s\n", strerror(errno));
 157                         log_err("fio: failed looking up hostname %s\n",
 158                                         client->hostname);
 159                         return 1;
 160                 }
 161
 162                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
 163         }
 164
 165         fd = socket(AF_INET, SOCK_STREAM, 0);
 166         if (fd < 0) {
 167                 log_err("fio: socket: %s\n", strerror(errno));
 168                 return 1;
 169         }
 170
 171         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 172                 log_err("fio: connect: %s\n", strerror(errno));
 173                 log_err("fio: failed to connect to %s\n", client->hostname);
 174                 return 1;
 175         }
 176
 177         client->fd = fd;
 178         client->state = Client_connected;
 179         return 0;
 180 }
 181
 182 void fio_clients_terminate(void)
 183 {
 184         struct flist_head *entry;
 185         struct fio_client *client;
 186
 187         dprint(FD_NET, "client: terminate clients\n");
 188
 189         flist_for_each(entry, &client_list) {
 190                 client = flist_entry(entry, struct fio_client, list);
 191
 192                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
 193         }
 194 }
 195
 196 static void sig_int(int sig)
 197 {
 198         dprint(FD_NET, "client: got sign %d\n", sig);
 199         fio_clients_terminate();
 200 }
 201
 202 static void client_signal_handler(void)
 203 {
 204         struct sigaction act;
 205
 206         memset(&act, 0, sizeof(act));
 207         act.sa_handler = sig_int;
 208         act.sa_flags = SA_RESTART;
 209         sigaction(SIGINT, &act, NULL);
 210
 211         memset(&act, 0, sizeof(act));
 212         act.sa_handler = sig_int;
 213         act.sa_flags = SA_RESTART;
 214         sigaction(SIGTERM, &act, NULL);
 215 }
 216
 217 static void probe_client(struct fio_client *client)
 218 {
 219         dprint(FD_NET, "client: send probe\n");
 220
 221         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
 222         handle_client(client);
 223 }
 224
 225 static int send_client_cmd_line(struct fio_client *client)
 226 {
 227         struct cmd_line_pdu *pdu;
 228         int i, ret;
 229
 230         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 231
 232         pdu = malloc(sizeof(*pdu));
 233         for (i = 0; i < client->argc; i++)
 234                 strcpy((char *) pdu->argv[i], client->argv[i]);
 235
 236         pdu->argc = cpu_to_le16(client->argc);
 237         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, sizeof(*pdu));
 238         free(pdu);
 239         return ret;
 240 }
 241
 242 int fio_clients_connect(void)
 243 {
 244         struct fio_client *client;
 245         struct flist_head *entry, *tmp;
 246         int ret;
 247
 248         dprint(FD_NET, "client: connect all\n");
 249
 250         client_signal_handler();
 251
 252         flist_for_each_safe(entry, tmp, &client_list) {
 253                 client = flist_entry(entry, struct fio_client, list);
 254
 255                 ret = fio_client_connect(client);
 256                 if (ret) {
 257                         remove_client(client);
 258                         continue;
 259                 }
 260
 261                 probe_client(client);
 262
 263                 if (client->argc > 1)
 264                         send_client_cmd_line(client);
 265         }
 266
 267         return !nr_clients;
 268 }
 269
 270 /*
 271  * Send file contents to server backend. We could use sendfile(), but to remain
 272  * more portable lets just read/write the darn thing.
 273  */
 274 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 275 {
 276         struct stat sb;
 277         char *p, *buf;
 278         off_t len;
 279         int fd, ret;
 280
 281         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 282
 283         fd = open(filename, O_RDONLY);
 284         if (fd < 0) {
 285                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 286                 return 1;
 287         }
 288
 289         if (fstat(fd, &sb) < 0) {
 290                 log_err("fio: job file stat: %s\n", strerror(errno));
 291                 return 1;
 292         }
 293
 294         buf = malloc(sb.st_size);
 295
 296         len = sb.st_size;
 297         p = buf;
 298         do {
 299                 ret = read(fd, p, len);
 300                 if (ret > 0) {
 301                         len -= ret;
 302                         if (!len)
 303                                 break;
 304                         p += ret;
 305                         continue;
 306                 } else if (!ret)
 307                         break;
 308                 else if (errno == EAGAIN || errno == EINTR)
 309                         continue;
 310         } while (1);
 311
 312         if (len) {
 313                 log_err("fio: failed reading job file %s\n", filename);
 314                 return 1;
 315         }
 316
 317         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
 318         free(buf);
 319         return ret;
 320 }
 321
 322 int fio_clients_send_ini(const char *filename)
 323 {
 324         struct fio_client *client;
 325         struct flist_head *entry, *tmp;
 326
 327         flist_for_each_safe(entry, tmp, &client_list) {
 328                 client = flist_entry(entry, struct fio_client, list);
 329
 330                 if (fio_client_send_ini(client, filename))
 331                         remove_client(client);
 332         }
 333
 334         return !nr_clients;
 335 }
 336
 337 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 338 {
 339         dst->max_val    = le64_to_cpu(src->max_val);
 340         dst->min_val    = le64_to_cpu(src->min_val);
 341         dst->samples    = le64_to_cpu(src->samples);
 342
 343         /*
 344          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 345          */
 346         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 347         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 348 }
 349
 350 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 351 {
 352         int i, j;
 353
 354         dst->error      = le32_to_cpu(src->error);
 355         dst->groupid    = le32_to_cpu(src->groupid);
 356         dst->pid        = le32_to_cpu(src->pid);
 357         dst->members    = le32_to_cpu(src->members);
 358
 359         for (i = 0; i < 2; i++) {
 360                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 361                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 362                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 363                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 364         }
 365
 366         dst->usr_time           = le64_to_cpu(src->usr_time);
 367         dst->sys_time           = le64_to_cpu(src->sys_time);
 368         dst->ctx                = le64_to_cpu(src->ctx);
 369         dst->minf               = le64_to_cpu(src->minf);
 370         dst->majf               = le64_to_cpu(src->majf);
 371         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 372
 373         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 374                 fio_fp64_t *fps = &src->percentile_list[i];
 375                 fio_fp64_t *fpd = &dst->percentile_list[i];
 376
 377                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 378         }
 379
 380         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 381                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 382                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 383                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 384         }
 385
 386         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 387                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 388                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 389         }
 390
 391         for (i = 0; i < 2; i++)
 392                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 393                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 394
 395         for (i = 0; i < 3; i++) {
 396                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 397                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 398         }
 399
 400         dst->total_submit       = le64_to_cpu(src->total_submit);
 401         dst->total_complete     = le64_to_cpu(src->total_complete);
 402
 403         for (i = 0; i < 2; i++) {
 404                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 405                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 406         }
 407
 408         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 409         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 410         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 411         dst->first_error        = le32_to_cpu(src->first_error);
 412         dst->kb_base            = le32_to_cpu(src->kb_base);
 413 }
 414
 415 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 416 {
 417         int i;
 418
 419         for (i = 0; i < 2; i++) {
 420                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 421                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 422                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 423                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 424                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 425                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 426         }
 427
 428         dst->kb_base    = le32_to_cpu(src->kb_base);
 429         dst->groupid    = le32_to_cpu(src->groupid);
 430 }
 431
 432 static void handle_ts(struct fio_net_cmd *cmd)
 433 {
 434         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 435
 436         convert_ts(&p->ts, &p->ts);
 437         convert_gs(&p->rs, &p->rs);
 438
 439         show_thread_status(&p->ts, &p->rs);
 440 }
 441
 442 static void handle_gs(struct fio_net_cmd *cmd)
 443 {
 444         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 445
 446         convert_gs(gs, gs);
 447         show_group_stats(gs);
 448 }
 449
 450 static void handle_eta(struct fio_net_cmd *cmd)
 451 {
 452         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 453         int i;
 454
 455         je->nr_running          = le32_to_cpu(je->nr_running);
 456         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 457         je->nr_pending          = le32_to_cpu(je->nr_pending);
 458         je->files_open          = le32_to_cpu(je->files_open);
 459         je->m_rate              = le32_to_cpu(je->m_rate);
 460         je->t_rate              = le32_to_cpu(je->t_rate);
 461         je->m_iops              = le32_to_cpu(je->m_iops);
 462         je->t_iops              = le32_to_cpu(je->t_iops);
 463
 464         for (i = 0; i < 2; i++) {
 465                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 466                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 467         }
 468
 469         je->elapsed_sec         = le32_to_cpu(je->nr_running);
 470         je->eta_sec             = le64_to_cpu(je->eta_sec);
 471
 472         display_thread_status(je);
 473 }
 474
 475 static void handle_probe(struct fio_net_cmd *cmd)
 476 {
 477         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 478
 479         log_info("Probe: hostname=%s, be=%u, fio ver %u.%u.%u\n",
 480                 probe->hostname, probe->bigendian, probe->fio_major,
 481                 probe->fio_minor, probe->fio_patch);
 482 }
 483
 484 static int handle_client(struct fio_client *client)
 485 {
 486         struct fio_net_cmd *cmd;
 487
 488         dprint(FD_NET, "client: handle %s\n", client->hostname);
 489
 490         cmd = fio_net_recv_cmd(client->fd);
 491         if (!cmd)
 492                 return 0;
 493
 494         dprint(FD_NET, "client: got cmd op %d from %s\n",
 495                                         cmd->opcode, client->hostname);
 496
 497         switch (cmd->opcode) {
 498         case FIO_NET_CMD_QUIT:
 499                 remove_client(client);
 500                 free(cmd);
 501                 break;
 502         case FIO_NET_CMD_TEXT: {
 503                 const char *buf = (const char *) cmd->payload;
 504                 int fio_unused ret;
 505
 506                 if (!client->skip_newline)
 507                         fprintf(f_out, "<%s> ", client->hostname);
 508                 ret = fwrite(buf, cmd->pdu_len, 1, f_out);
 509                 fflush(f_out);
 510                 client->skip_newline = strchr(buf, '\n') == NULL;
 511                 free(cmd);
 512                 break;
 513                 }
 514         case FIO_NET_CMD_TS:
 515                 handle_ts(cmd);
 516                 free(cmd);
 517                 break;
 518         case FIO_NET_CMD_GS:
 519                 handle_gs(cmd);
 520                 free(cmd);
 521                 break;
 522         case FIO_NET_CMD_ETA:
 523                 handle_eta(cmd);
 524                 free(cmd);
 525                 break;
 526         case FIO_NET_CMD_PROBE:
 527                 handle_probe(cmd);
 528                 free(cmd);
 529                 break;
 530         case FIO_NET_CMD_START:
 531                 client->state = Client_started;
 532                 free(cmd);
 533                 break;
 534         case FIO_NET_CMD_STOP:
 535                 client->state = Client_stopped;
 536                 free(cmd);
 537                 break;
 538         default:
 539                 log_err("fio: unknown client op: %d\n", cmd->opcode);
 540                 free(cmd);
 541                 break;
 542         }
 543
 544         return 1;
 545 }
 546
 547 int fio_handle_clients(void)
 548 {
 549         struct fio_client *client;
 550         struct flist_head *entry;
 551         struct pollfd *pfds;
 552         int i, ret = 0;
 553
 554         pfds = malloc(nr_clients * sizeof(struct pollfd));
 555
 556         while (!exit_backend && nr_clients) {
 557                 i = 0;
 558                 flist_for_each(entry, &client_list) {
 559                         client = flist_entry(entry, struct fio_client, list);
 560
 561                         pfds[i].fd = client->fd;
 562                         pfds[i].events = POLLIN;
 563                         i++;
 564                 }
 565
 566                 assert(i == nr_clients);
 567
 568                 do {
 569                         ret = poll(pfds, nr_clients, 100);
 570                         if (ret < 0) {
 571                                 if (errno == EINTR)
 572                                         continue;
 573                                 log_err("fio: poll clients: %s\n", strerror(errno));
 574                                 break;
 575                         } else if (!ret)
 576                                 continue;
 577                 } while (ret <= 0);
 578
 579                 for (i = 0; i < nr_clients; i++) {
 580                         if (!(pfds[i].revents & POLLIN))
 581                                 continue;
 582
 583                         client = find_client_by_fd(pfds[i].fd);
 584                         if (!client) {
 585                                 log_err("fio: unknown client\n");
 586                                 continue;
 587                         }
 588                         if (!handle_client(client)) {
 589                                 log_info("client: host=%s disconnected\n",
 590                                                 client->hostname);
 591                                 remove_client(client);
 592                         }
 593                 }
 594         }
 595
 596         free(pfds);
 597         return 0;
 598 }