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, int one);
  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                         return 1;
 158                 }
 159
 160                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
 161         }
 162
 163         fd = socket(AF_INET, SOCK_STREAM, 0);
 164         if (fd < 0) {
 165                 log_err("fio: socket: %s\n", strerror(errno));
 166                 return 1;
 167         }
 168
 169         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 170                 log_err("fio: connect: %s\n", strerror(errno));
 171                 log_err("fio: failed to connect to %s\n", client->hostname);
 172                 return 1;
 173         }
 174
 175         client->fd = fd;
 176         client->state = Client_connected;
 177         return 0;
 178 }
 179
 180 void fio_clients_terminate(void)
 181 {
 182         struct flist_head *entry;
 183         struct fio_client *client;
 184
 185         dprint(FD_NET, "client: terminate clients\n");
 186
 187         flist_for_each(entry, &client_list) {
 188                 client = flist_entry(entry, struct fio_client, list);
 189
 190                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
 191         }
 192 }
 193
 194 static void sig_int(int sig)
 195 {
 196         dprint(FD_NET, "client: got sign %d\n", sig);
 197         fio_clients_terminate();
 198 }
 199
 200 static void client_signal_handler(void)
 201 {
 202         struct sigaction act;
 203
 204         memset(&act, 0, sizeof(act));
 205         act.sa_handler = sig_int;
 206         act.sa_flags = SA_RESTART;
 207         sigaction(SIGINT, &act, NULL);
 208
 209         memset(&act, 0, sizeof(act));
 210         act.sa_handler = sig_int;
 211         act.sa_flags = SA_RESTART;
 212         sigaction(SIGTERM, &act, NULL);
 213 }
 214
 215 static void probe_client(struct fio_client *client)
 216 {
 217         dprint(FD_NET, "client: send probe\n");
 218
 219         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
 220         handle_client(client, 1);
 221 }
 222
 223 static int send_client_cmd_line(struct fio_client *client)
 224 {
 225         struct cmd_line_pdu *pdu;
 226         int i, ret;
 227
 228         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 229
 230         pdu = malloc(sizeof(*pdu));
 231         for (i = 0; i < client->argc; i++)
 232                 strcpy((char *) pdu->argv[i], client->argv[i]);
 233
 234         pdu->argc = cpu_to_le16(client->argc);
 235         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, sizeof(*pdu));
 236         free(pdu);
 237         return ret;
 238 }
 239
 240 int fio_clients_connect(void)
 241 {
 242         struct fio_client *client;
 243         struct flist_head *entry, *tmp;
 244         int ret;
 245
 246         dprint(FD_NET, "client: connect all\n");
 247
 248         client_signal_handler();
 249
 250         flist_for_each_safe(entry, tmp, &client_list) {
 251                 client = flist_entry(entry, struct fio_client, list);
 252
 253                 ret = fio_client_connect(client);
 254                 if (ret) {
 255                         remove_client(client);
 256                         continue;
 257                 }
 258
 259                 probe_client(client);
 260
 261                 if (client->argc > 1)
 262                         send_client_cmd_line(client);
 263         }
 264
 265         return !nr_clients;
 266 }
 267
 268 /*
 269  * Send file contents to server backend. We could use sendfile(), but to remain
 270  * more portable lets just read/write the darn thing.
 271  */
 272 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 273 {
 274         struct stat sb;
 275         char *p, *buf;
 276         off_t len;
 277         int fd, ret;
 278
 279         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 280
 281         fd = open(filename, O_RDONLY);
 282         if (fd < 0) {
 283                 log_err("fio: job file open: %s\n", strerror(errno));
 284                 return 1;
 285         }
 286
 287         if (fstat(fd, &sb) < 0) {
 288                 log_err("fio: job file stat: %s\n", strerror(errno));
 289                 return 1;
 290         }
 291
 292         buf = malloc(sb.st_size);
 293
 294         len = sb.st_size;
 295         p = buf;
 296         do {
 297                 ret = read(fd, p, len);
 298                 if (ret > 0) {
 299                         len -= ret;
 300                         if (!len)
 301                                 break;
 302                         p += ret;
 303                         continue;
 304                 } else if (!ret)
 305                         break;
 306                 else if (errno == EAGAIN || errno == EINTR)
 307                         continue;
 308         } while (1);
 309
 310         if (len) {
 311                 log_err("fio: failed reading job file %s\n", filename);
 312                 return 1;
 313         }
 314
 315         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
 316         free(buf);
 317         return ret;
 318 }
 319
 320 int fio_clients_send_ini(const char *filename)
 321 {
 322         struct fio_client *client;
 323         struct flist_head *entry, *tmp;
 324
 325         flist_for_each_safe(entry, tmp, &client_list) {
 326                 client = flist_entry(entry, struct fio_client, list);
 327
 328                 if (fio_client_send_ini(client, filename))
 329                         remove_client(client);
 330         }
 331
 332         return !nr_clients;
 333 }
 334
 335 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 336 {
 337         dst->max_val    = le64_to_cpu(src->max_val);
 338         dst->min_val    = le64_to_cpu(src->min_val);
 339         dst->samples    = le64_to_cpu(src->samples);
 340
 341         /*
 342          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 343          */
 344         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 345         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 346 }
 347
 348 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 349 {
 350         int i, j;
 351
 352         dst->error      = le32_to_cpu(src->error);
 353         dst->groupid    = le32_to_cpu(src->groupid);
 354         dst->pid        = le32_to_cpu(src->pid);
 355         dst->members    = le32_to_cpu(src->members);
 356
 357         for (i = 0; i < 2; i++) {
 358                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 359                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 360                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 361                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 362         }
 363
 364         dst->usr_time           = le64_to_cpu(src->usr_time);
 365         dst->sys_time           = le64_to_cpu(src->sys_time);
 366         dst->ctx                = le64_to_cpu(src->ctx);
 367         dst->minf               = le64_to_cpu(src->minf);
 368         dst->majf               = le64_to_cpu(src->majf);
 369         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 370
 371         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 372                 fio_fp64_t *fps = &src->percentile_list[i];
 373                 fio_fp64_t *fpd = &dst->percentile_list[i];
 374
 375                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 376         }
 377
 378         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 379                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 380                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 381                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 382         }
 383
 384         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 385                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 386                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 387         }
 388
 389         for (i = 0; i < 2; i++)
 390                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 391                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 392
 393         for (i = 0; i < 3; i++) {
 394                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 395                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 396         }
 397
 398         dst->total_submit       = le64_to_cpu(src->total_submit);
 399         dst->total_complete     = le64_to_cpu(src->total_complete);
 400
 401         for (i = 0; i < 2; i++) {
 402                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 403                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 404         }
 405
 406         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 407         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 408         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 409         dst->first_error        = le32_to_cpu(src->first_error);
 410         dst->kb_base            = le32_to_cpu(src->kb_base);
 411 }
 412
 413 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 414 {
 415         int i;
 416
 417         for (i = 0; i < 2; i++) {
 418                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 419                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 420                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 421                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 422                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 423                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 424         }
 425
 426         dst->kb_base    = le32_to_cpu(src->kb_base);
 427         dst->groupid    = le32_to_cpu(src->groupid);
 428 }
 429
 430 static void handle_ts(struct fio_net_cmd *cmd)
 431 {
 432         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 433
 434         convert_ts(&p->ts, &p->ts);
 435         convert_gs(&p->rs, &p->rs);
 436
 437         show_thread_status(&p->ts, &p->rs);
 438 }
 439
 440 static void handle_gs(struct fio_net_cmd *cmd)
 441 {
 442         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 443
 444         convert_gs(gs, gs);
 445         show_group_stats(gs);
 446 }
 447
 448 static void handle_eta(struct fio_net_cmd *cmd)
 449 {
 450         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 451         int i;
 452
 453         je->nr_running          = le32_to_cpu(je->nr_running);
 454         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 455         je->nr_pending          = le32_to_cpu(je->nr_pending);
 456         je->files_open          = le32_to_cpu(je->files_open);
 457         je->m_rate              = le32_to_cpu(je->m_rate);
 458         je->t_rate              = le32_to_cpu(je->t_rate);
 459         je->m_iops              = le32_to_cpu(je->m_iops);
 460         je->t_iops              = le32_to_cpu(je->t_iops);
 461
 462         for (i = 0; i < 2; i++) {
 463                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 464                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 465         }
 466
 467         je->elapsed_sec         = le32_to_cpu(je->nr_running);
 468         je->eta_sec             = le64_to_cpu(je->eta_sec);
 469
 470         display_thread_status(je);
 471 }
 472
 473 static void handle_probe(struct fio_net_cmd *cmd)
 474 {
 475         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 476
 477         log_info("Probe: hostname=%s, be=%u, fio ver %u.%u.%u\n",
 478                 probe->hostname, probe->bigendian, probe->fio_major,
 479                 probe->fio_minor, probe->fio_patch);
 480 }
 481
 482 static int handle_client(struct fio_client *client, int one)
 483 {
 484         struct fio_net_cmd *cmd;
 485         int done = 0;
 486
 487         dprint(FD_NET, "client: handle %s\n", client->hostname);
 488
 489         while ((cmd = fio_net_recv_cmd(client->fd, 1)) != NULL) {
 490                 dprint(FD_NET, "%s: got cmd op %d\n", client->hostname,
 491                                                         cmd->opcode);
 492
 493                 switch (cmd->opcode) {
 494                 case FIO_NET_CMD_QUIT:
 495                         remove_client(client);
 496                         free(cmd);
 497                         done = 1;
 498                         break;
 499                 case FIO_NET_CMD_TEXT: {
 500                         const char *buf = (const char *) cmd->payload;
 501                         int fio_unused ret;
 502
 503                         if (!client->skip_newline)
 504                                 fprintf(f_out, "<%s> ", client->hostname);
 505                         ret = fwrite(buf, cmd->pdu_len, 1, f_out);
 506                         fflush(f_out);
 507                         client->skip_newline = strchr(buf, '\n') == NULL;
 508                         free(cmd);
 509                         break;
 510                         }
 511                 case FIO_NET_CMD_TS:
 512                         handle_ts(cmd);
 513                         free(cmd);
 514                         break;
 515                 case FIO_NET_CMD_GS:
 516                         handle_gs(cmd);
 517                         free(cmd);
 518                         break;
 519                 case FIO_NET_CMD_ETA:
 520                         handle_eta(cmd);
 521                         free(cmd);
 522                         break;
 523                 case FIO_NET_CMD_PROBE:
 524                         handle_probe(cmd);
 525                         free(cmd);
 526                         break;
 527                 case FIO_NET_CMD_START:
 528                         client->state = Client_started;
 529                         free(cmd);
 530                         break;
 531                 case FIO_NET_CMD_STOP:
 532                         client->state = Client_stopped;
 533                         free(cmd);
 534                         break;
 535                 default:
 536                         log_err("fio: unknown client op: %d\n", cmd->opcode);
 537                         free(cmd);
 538                         break;
 539                 }
 540
 541                 if (done || one)
 542                         break;
 543         }
 544
 545         return 0;
 546 }
 547
 548 int fio_handle_clients(void)
 549 {
 550         struct fio_client *client;
 551         struct flist_head *entry;
 552         struct pollfd *pfds;
 553         int i, ret = 0;
 554
 555         pfds = malloc(nr_clients * sizeof(struct pollfd));
 556
 557         while (!exit_backend && nr_clients) {
 558                 i = 0;
 559                 flist_for_each(entry, &client_list) {
 560                         client = flist_entry(entry, struct fio_client, list);
 561
 562                         pfds[i].fd = client->fd;
 563                         pfds[i].events = POLLIN;
 564                         i++;
 565                 }
 566
 567                 assert(i == nr_clients);
 568
 569                 do {
 570                         ret = poll(pfds, nr_clients, 100);
 571                         if (ret < 0) {
 572                                 if (errno == EINTR)
 573                                         continue;
 574                                 log_err("fio: poll clients: %s\n", strerror(errno));
 575                                 break;
 576                         } else if (!ret)
 577                                 continue;
 578                 } while (ret <= 0);
 579
 580                 for (i = 0; i < nr_clients; i++) {
 581                         if (!(pfds[i].revents & POLLIN))
 582                                 continue;
 583
 584                         client = find_client_by_fd(pfds[i].fd);
 585                         if (!client) {
 586                                 log_err("fio: unknown client\n");
 587                                 continue;
 588                         }
 589                         handle_client(client, 0);
 590                 }
 591         }
 592
 593         free(pfds);
 594         return 0;
 595 }