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