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