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 "flist.h"
  20 #include "hash.h"
  21
  22 struct fio_client {
  23         struct flist_head list;
  24         struct flist_head fd_hash_list;
  25         struct flist_head name_hash_list;
  26         struct sockaddr_in addr;
  27         char *hostname;
  28         int fd;
  29
  30         int state;
  31         int skip_newline;
  32
  33         uint16_t argc;
  34         char **argv;
  35 };
  36
  37 enum {
  38         Client_created          = 0,
  39         Client_connected        = 1,
  40         Client_started          = 2,
  41         Client_stopped          = 3,
  42         Client_exited           = 4,
  43 };
  44
  45 static FLIST_HEAD(client_list);
  46
  47 #define FIO_CLIENT_HASH_BITS    7
  48 #define FIO_CLIENT_HASH_SZ      (1 << FIO_CLIENT_HASH_BITS)
  49 #define FIO_CLIENT_HASH_MASK    (FIO_CLIENT_HASH_SZ - 1)
  50 static struct flist_head client_fd_hash[FIO_CLIENT_HASH_SZ];
  51 static struct flist_head client_name_hash[FIO_CLIENT_HASH_SZ];
  52
  53 static int handle_client(struct fio_client *client);
  54
  55 static void fio_client_add_fd_hash(struct fio_client *client)
  56 {
  57         int bucket = hash_long(client->fd, FIO_CLIENT_HASH_BITS);
  58
  59         bucket &= FIO_CLIENT_HASH_MASK;
  60         flist_add(&client->fd_hash_list, &client_fd_hash[bucket]);
  61 }
  62
  63 static void fio_client_remove_fd_hash(struct fio_client *client)
  64 {
  65         if (!flist_empty(&client->fd_hash_list))
  66                 flist_del_init(&client->fd_hash_list);
  67 }
  68
  69 static void fio_client_add_name_hash(struct fio_client *client)
  70 {
  71         int bucket = jhash(client->hostname, strlen(client->hostname), 0);
  72
  73         bucket &= FIO_CLIENT_HASH_MASK;
  74         flist_add(&client->name_hash_list, &client_name_hash[bucket]);
  75 }
  76
  77 static void fio_client_remove_name_hash(struct fio_client *client)
  78 {
  79         if (!flist_empty(&client->name_hash_list))
  80                 flist_del_init(&client->name_hash_list);
  81 }
  82
  83 static void fio_init fio_client_hash_init(void)
  84 {
  85         int i;
  86
  87         for (i = 0; i < FIO_CLIENT_HASH_SZ; i++) {
  88                 INIT_FLIST_HEAD(&client_fd_hash[i]);
  89                 INIT_FLIST_HEAD(&client_name_hash[i]);
  90         }
  91 }
  92
  93 static struct fio_client *find_client_by_fd(int fd)
  94 {
  95         int bucket = hash_long(fd, FIO_CLIENT_HASH_BITS) & FIO_CLIENT_HASH_MASK;
  96         struct fio_client *client;
  97         struct flist_head *entry;
  98
  99         flist_for_each(entry, &client_fd_hash[bucket]) {
 100                 client = flist_entry(entry, struct fio_client, fd_hash_list);
 101
 102                 if (client->fd == fd)
 103                         return client;
 104         }
 105
 106         return NULL;
 107 }
 108
 109 static struct fio_client *find_client_by_name(const char *name)
 110 {
 111         int bucket = jhash(name, strlen(name), 0) & FIO_CLIENT_HASH_BITS;
 112         struct fio_client *client;
 113         struct flist_head *entry;
 114
 115         flist_for_each(entry, &client_name_hash[bucket]) {
 116                 client = flist_entry(entry, struct fio_client, name_hash_list);
 117
 118                 if (!strcmp(name, client->hostname))
 119                         return client;
 120         }
 121
 122         return NULL;
 123 }
 124
 125 static void remove_client(struct fio_client *client)
 126 {
 127         dprint(FD_NET, "client: removed <%s>\n", client->hostname);
 128         flist_del(&client->list);
 129
 130         fio_client_remove_fd_hash(client);
 131         fio_client_remove_name_hash(client);
 132
 133         free(client->hostname);
 134         if (client->argv)
 135                 free(client->argv);
 136
 137         free(client);
 138         nr_clients--;
 139 }
 140
 141 static int __fio_client_add_cmd_option(struct fio_client *client,
 142                                        const char *opt)
 143 {
 144         int index;
 145
 146         if (client->argc == FIO_NET_CMD_JOBLINE_ARGV) {
 147                 log_err("fio: max cmd line number reached.\n");
 148                 log_err("fio: cmd line <%s> has been ignored.\n", opt);
 149                 return 1;
 150         }
 151
 152         index = client->argc++;
 153         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
 154         client->argv[index] = strdup(opt);
 155         dprint(FD_NET, "client: add cmd %d: %s\n", index, opt);
 156         return 0;
 157 }
 158
 159 int fio_client_add_cmd_option(const char *hostname, const char *opt)
 160 {
 161         struct fio_client *client;
 162
 163         if (!hostname || !opt)
 164                 return 0;
 165
 166         client = find_client_by_name(hostname);
 167         if (!client) {
 168                 log_err("fio: unknown client %s\n", hostname);
 169                 return 1;
 170         }
 171
 172         return __fio_client_add_cmd_option(client, opt);
 173 }
 174
 175 void fio_client_add(const char *hostname)
 176 {
 177         struct fio_client *client;
 178
 179         dprint(FD_NET, "client: added  <%s>\n", hostname);
 180         client = malloc(sizeof(*client));
 181         memset(client, 0, sizeof(*client));
 182
 183         INIT_FLIST_HEAD(&client->list);
 184         INIT_FLIST_HEAD(&client->fd_hash_list);
 185         INIT_FLIST_HEAD(&client->name_hash_list);
 186
 187         client->hostname = strdup(hostname);
 188         client->fd = -1;
 189
 190         fio_client_add_name_hash(client);
 191
 192         __fio_client_add_cmd_option(client, "fio");
 193
 194         flist_add(&client->list, &client_list);
 195         nr_clients++;
 196 }
 197
 198 static int fio_client_connect(struct fio_client *client)
 199 {
 200         int fd;
 201
 202         dprint(FD_NET, "client: connect to host %s\n", client->hostname);
 203
 204         memset(&client->addr, 0, sizeof(client->addr));
 205         client->addr.sin_family = AF_INET;
 206         client->addr.sin_port = htons(fio_net_port);
 207
 208         if (inet_aton(client->hostname, &client->addr.sin_addr) != 1) {
 209                 struct hostent *hent;
 210
 211                 hent = gethostbyname(client->hostname);
 212                 if (!hent) {
 213                         log_err("fio: gethostbyname: %s\n", strerror(errno));
 214                         log_err("fio: failed looking up hostname %s\n",
 215                                         client->hostname);
 216                         return 1;
 217                 }
 218
 219                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
 220         }
 221
 222         fd = socket(AF_INET, SOCK_STREAM, 0);
 223         if (fd < 0) {
 224                 log_err("fio: socket: %s\n", strerror(errno));
 225                 return 1;
 226         }
 227
 228         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 229                 log_err("fio: connect: %s\n", strerror(errno));
 230                 log_err("fio: failed to connect to %s\n", client->hostname);
 231                 return 1;
 232         }
 233
 234         client->fd = fd;
 235         fio_client_add_fd_hash(client);
 236         client->state = Client_connected;
 237         return 0;
 238 }
 239
 240 void fio_clients_terminate(void)
 241 {
 242         struct flist_head *entry;
 243         struct fio_client *client;
 244
 245         dprint(FD_NET, "client: terminate clients\n");
 246
 247         flist_for_each(entry, &client_list) {
 248                 client = flist_entry(entry, struct fio_client, list);
 249
 250                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
 251         }
 252 }
 253
 254 static void sig_int(int sig)
 255 {
 256         dprint(FD_NET, "client: got sign %d\n", sig);
 257         fio_clients_terminate();
 258 }
 259
 260 static void client_signal_handler(void)
 261 {
 262         struct sigaction act;
 263
 264         memset(&act, 0, sizeof(act));
 265         act.sa_handler = sig_int;
 266         act.sa_flags = SA_RESTART;
 267         sigaction(SIGINT, &act, NULL);
 268
 269         memset(&act, 0, sizeof(act));
 270         act.sa_handler = sig_int;
 271         act.sa_flags = SA_RESTART;
 272         sigaction(SIGTERM, &act, NULL);
 273 }
 274
 275 static void probe_client(struct fio_client *client)
 276 {
 277         dprint(FD_NET, "client: send probe\n");
 278
 279         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
 280         handle_client(client);
 281 }
 282
 283 static int send_client_cmd_line(struct fio_client *client)
 284 {
 285         struct cmd_line_pdu *pdu;
 286         int i, ret;
 287
 288         dprint(FD_NET, "client: send cmdline %d\n", client->argc);
 289
 290         pdu = malloc(sizeof(*pdu));
 291         for (i = 0; i < client->argc; i++)
 292                 strcpy((char *) pdu->argv[i], client->argv[i]);
 293
 294         pdu->argc = cpu_to_le16(client->argc);
 295         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, sizeof(*pdu));
 296         free(pdu);
 297         return ret;
 298 }
 299
 300 int fio_clients_connect(void)
 301 {
 302         struct fio_client *client;
 303         struct flist_head *entry, *tmp;
 304         int ret;
 305
 306         dprint(FD_NET, "client: connect all\n");
 307
 308         client_signal_handler();
 309
 310         flist_for_each_safe(entry, tmp, &client_list) {
 311                 client = flist_entry(entry, struct fio_client, list);
 312
 313                 ret = fio_client_connect(client);
 314                 if (ret) {
 315                         remove_client(client);
 316                         continue;
 317                 }
 318
 319                 probe_client(client);
 320
 321                 if (client->argc > 1)
 322                         send_client_cmd_line(client);
 323         }
 324
 325         return !nr_clients;
 326 }
 327
 328 /*
 329  * Send file contents to server backend. We could use sendfile(), but to remain
 330  * more portable lets just read/write the darn thing.
 331  */
 332 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 333 {
 334         struct stat sb;
 335         char *p, *buf;
 336         off_t len;
 337         int fd, ret;
 338
 339         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 340
 341         fd = open(filename, O_RDONLY);
 342         if (fd < 0) {
 343                 log_err("fio: job file <%s> open: %s\n", filename, strerror(errno));
 344                 return 1;
 345         }
 346
 347         if (fstat(fd, &sb) < 0) {
 348                 log_err("fio: job file stat: %s\n", strerror(errno));
 349                 return 1;
 350         }
 351
 352         buf = malloc(sb.st_size);
 353
 354         len = sb.st_size;
 355         p = buf;
 356         do {
 357                 ret = read(fd, p, len);
 358                 if (ret > 0) {
 359                         len -= ret;
 360                         if (!len)
 361                                 break;
 362                         p += ret;
 363                         continue;
 364                 } else if (!ret)
 365                         break;
 366                 else if (errno == EAGAIN || errno == EINTR)
 367                         continue;
 368         } while (1);
 369
 370         if (len) {
 371                 log_err("fio: failed reading job file %s\n", filename);
 372                 return 1;
 373         }
 374
 375         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
 376         free(buf);
 377         return ret;
 378 }
 379
 380 int fio_clients_send_ini(const char *filename)
 381 {
 382         struct fio_client *client;
 383         struct flist_head *entry, *tmp;
 384
 385         flist_for_each_safe(entry, tmp, &client_list) {
 386                 client = flist_entry(entry, struct fio_client, list);
 387
 388                 if (fio_client_send_ini(client, filename))
 389                         remove_client(client);
 390         }
 391
 392         return !nr_clients;
 393 }
 394
 395 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 396 {
 397         dst->max_val    = le64_to_cpu(src->max_val);
 398         dst->min_val    = le64_to_cpu(src->min_val);
 399         dst->samples    = le64_to_cpu(src->samples);
 400
 401         /*
 402          * Floats arrive as IEEE 754 encoded uint64_t, convert back to double
 403          */
 404         dst->mean.u.f   = fio_uint64_to_double(le64_to_cpu(dst->mean.u.i));
 405         dst->S.u.f      = fio_uint64_to_double(le64_to_cpu(dst->S.u.i));
 406 }
 407
 408 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 409 {
 410         int i, j;
 411
 412         dst->error      = le32_to_cpu(src->error);
 413         dst->groupid    = le32_to_cpu(src->groupid);
 414         dst->pid        = le32_to_cpu(src->pid);
 415         dst->members    = le32_to_cpu(src->members);
 416
 417         for (i = 0; i < 2; i++) {
 418                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 419                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 420                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 421                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 422         }
 423
 424         dst->usr_time           = le64_to_cpu(src->usr_time);
 425         dst->sys_time           = le64_to_cpu(src->sys_time);
 426         dst->ctx                = le64_to_cpu(src->ctx);
 427         dst->minf               = le64_to_cpu(src->minf);
 428         dst->majf               = le64_to_cpu(src->majf);
 429         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 430
 431         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 432                 fio_fp64_t *fps = &src->percentile_list[i];
 433                 fio_fp64_t *fpd = &dst->percentile_list[i];
 434
 435                 fpd->u.f = fio_uint64_to_double(le64_to_cpu(fps->u.i));
 436         }
 437
 438         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 439                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 440                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 441                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 442         }
 443
 444         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 445                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 446                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 447         }
 448
 449         for (i = 0; i < 2; i++)
 450                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 451                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 452
 453         for (i = 0; i < 3; i++) {
 454                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 455                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 456         }
 457
 458         dst->total_submit       = le64_to_cpu(src->total_submit);
 459         dst->total_complete     = le64_to_cpu(src->total_complete);
 460
 461         for (i = 0; i < 2; i++) {
 462                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 463                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 464         }
 465
 466         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 467         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 468         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 469         dst->first_error        = le32_to_cpu(src->first_error);
 470         dst->kb_base            = le32_to_cpu(src->kb_base);
 471 }
 472
 473 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 474 {
 475         int i;
 476
 477         for (i = 0; i < 2; i++) {
 478                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 479                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 480                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 481                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 482                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 483                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 484         }
 485
 486         dst->kb_base    = le32_to_cpu(src->kb_base);
 487         dst->groupid    = le32_to_cpu(src->groupid);
 488 }
 489
 490 static void handle_ts(struct fio_net_cmd *cmd)
 491 {
 492         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 493
 494         convert_ts(&p->ts, &p->ts);
 495         convert_gs(&p->rs, &p->rs);
 496
 497         show_thread_status(&p->ts, &p->rs);
 498 }
 499
 500 static void handle_gs(struct fio_net_cmd *cmd)
 501 {
 502         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 503
 504         convert_gs(gs, gs);
 505         show_group_stats(gs);
 506 }
 507
 508 static void handle_eta(struct fio_net_cmd *cmd)
 509 {
 510         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 511         int i;
 512
 513         je->nr_running          = le32_to_cpu(je->nr_running);
 514         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 515         je->nr_pending          = le32_to_cpu(je->nr_pending);
 516         je->files_open          = le32_to_cpu(je->files_open);
 517         je->m_rate              = le32_to_cpu(je->m_rate);
 518         je->t_rate              = le32_to_cpu(je->t_rate);
 519         je->m_iops              = le32_to_cpu(je->m_iops);
 520         je->t_iops              = le32_to_cpu(je->t_iops);
 521
 522         for (i = 0; i < 2; i++) {
 523                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 524                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 525         }
 526
 527         je->elapsed_sec         = le32_to_cpu(je->nr_running);
 528         je->eta_sec             = le64_to_cpu(je->eta_sec);
 529
 530         display_thread_status(je);
 531 }
 532
 533 static void handle_probe(struct fio_net_cmd *cmd)
 534 {
 535         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 536
 537         log_info("Probe: hostname=%s, be=%u, fio ver %u.%u.%u\n",
 538                 probe->hostname, probe->bigendian, probe->fio_major,
 539                 probe->fio_minor, probe->fio_patch);
 540 }
 541
 542 static int handle_client(struct fio_client *client)
 543 {
 544         struct fio_net_cmd *cmd;
 545
 546         dprint(FD_NET, "client: handle %s\n", client->hostname);
 547
 548         cmd = fio_net_recv_cmd(client->fd);
 549         if (!cmd)
 550                 return 0;
 551
 552         dprint(FD_NET, "client: got cmd op %d from %s\n",
 553                                         cmd->opcode, client->hostname);
 554
 555         switch (cmd->opcode) {
 556         case FIO_NET_CMD_QUIT:
 557                 remove_client(client);
 558                 free(cmd);
 559                 break;
 560         case FIO_NET_CMD_TEXT: {
 561                 const char *buf = (const char *) cmd->payload;
 562                 int fio_unused ret;
 563
 564                 if (!client->skip_newline)
 565                         fprintf(f_out, "<%s> ", client->hostname);
 566                 ret = fwrite(buf, cmd->pdu_len, 1, f_out);
 567                 fflush(f_out);
 568                 client->skip_newline = strchr(buf, '\n') == NULL;
 569                 free(cmd);
 570                 break;
 571                 }
 572         case FIO_NET_CMD_TS:
 573                 handle_ts(cmd);
 574                 free(cmd);
 575                 break;
 576         case FIO_NET_CMD_GS:
 577                 handle_gs(cmd);
 578                 free(cmd);
 579                 break;
 580         case FIO_NET_CMD_ETA:
 581                 handle_eta(cmd);
 582                 free(cmd);
 583                 break;
 584         case FIO_NET_CMD_PROBE:
 585                 handle_probe(cmd);
 586                 free(cmd);
 587                 break;
 588         case FIO_NET_CMD_START:
 589                 client->state = Client_started;
 590                 free(cmd);
 591                 break;
 592         case FIO_NET_CMD_STOP:
 593                 client->state = Client_stopped;
 594                 free(cmd);
 595                 break;
 596         default:
 597                 log_err("fio: unknown client op: %d\n", cmd->opcode);
 598                 free(cmd);
 599                 break;
 600         }
 601
 602         return 1;
 603 }
 604
 605 int fio_handle_clients(void)
 606 {
 607         struct fio_client *client;
 608         struct flist_head *entry;
 609         struct pollfd *pfds;
 610         int i, ret = 0;
 611
 612         pfds = malloc(nr_clients * sizeof(struct pollfd));
 613
 614         while (!exit_backend && nr_clients) {
 615                 i = 0;
 616                 flist_for_each(entry, &client_list) {
 617                         client = flist_entry(entry, struct fio_client, list);
 618
 619                         pfds[i].fd = client->fd;
 620                         pfds[i].events = POLLIN;
 621                         i++;
 622                 }
 623
 624                 assert(i == nr_clients);
 625
 626                 do {
 627                         ret = poll(pfds, nr_clients, 100);
 628                         if (ret < 0) {
 629                                 if (errno == EINTR)
 630                                         continue;
 631                                 log_err("fio: poll clients: %s\n", strerror(errno));
 632                                 break;
 633                         } else if (!ret)
 634                                 continue;
 635                 } while (ret <= 0);
 636
 637                 for (i = 0; i < nr_clients; i++) {
 638                         if (!(pfds[i].revents & POLLIN))
 639                                 continue;
 640
 641                         client = find_client_by_fd(pfds[i].fd);
 642                         if (!client) {
 643                                 log_err("fio: unknown client fd %d\n", pfds[i].fd);
 644                                 continue;
 645                         }
 646                         if (!handle_client(client)) {
 647                                 log_info("client: host=%s disconnected\n",
 648                                                 client->hostname);
 649                                 remove_client(client);
 650                         }
 651                 }
 652         }
 653
 654         free(pfds);
 655         return 0;
 656 }