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/mman.h>
  12 #include <netinet/in.h>
  13 #include <arpa/inet.h>
  14 #include <netdb.h>
  15
  16 #include "fio.h"
  17 #include "server.h"
  18 #include "crc/crc32.h"
  19 #include "flist.h"
  20
  21 struct fio_client {
  22         struct flist_head list;
  23         struct sockaddr_in addr;
  24         char *hostname;
  25         int fd;
  26
  27         int state;
  28
  29         uint16_t argc;
  30         char **argv;
  31 };
  32
  33 enum {
  34         Client_created          = 0,
  35         Client_connected        = 1,
  36         Client_started          = 2,
  37         Client_stopped          = 3,
  38         Client_exited           = 4,
  39 };
  40
  41 static FLIST_HEAD(client_list);
  42
  43 static int handle_client(struct fio_client *client, int one);
  44
  45 static struct fio_client *find_client_by_fd(int fd)
  46 {
  47         struct fio_client *client;
  48         struct flist_head *entry;
  49
  50         flist_for_each(entry, &client_list) {
  51                 client = flist_entry(entry, struct fio_client, list);
  52
  53                 if (client->fd == fd)
  54                         return client;
  55         }
  56
  57         return NULL;
  58 }
  59
  60 static struct fio_client *find_client_by_name(const char *name)
  61 {
  62         struct fio_client *client;
  63         struct flist_head *entry;
  64
  65         flist_for_each(entry, &client_list) {
  66                 client = flist_entry(entry, struct fio_client, list);
  67
  68                 if (!strcmp(name, client->hostname))
  69                         return client;
  70         }
  71
  72         return NULL;
  73 }
  74
  75 static void remove_client(struct fio_client *client)
  76 {
  77         dprint(FD_NET, "removed client <%s>\n", client->hostname);
  78         flist_del(&client->list);
  79         nr_clients--;
  80
  81         free(client->hostname);
  82         if (client->argv)
  83                 free(client->argv);
  84
  85         free(client);
  86 }
  87
  88 static void __fio_client_add_cmd_option(struct fio_client *client,
  89                                         const char *opt)
  90 {
  91         client->argc++;
  92         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
  93         client->argv[client->argc - 1] = strdup(opt);
  94 }
  95
  96 void fio_client_add_cmd_option(const char *hostname, const char *opt)
  97 {
  98         struct fio_client *client;
  99
 100         if (!hostname || !opt)
 101                 return;
 102
 103         client = find_client_by_name(hostname);
 104         if (!client) {
 105                 log_err("fio: unknown client %s\n", hostname);
 106                 return;
 107         }
 108
 109         __fio_client_add_cmd_option(client, opt);
 110 }
 111
 112 void fio_client_add(const char *hostname)
 113 {
 114         struct fio_client *client;
 115
 116         dprint(FD_NET, "added client <%s>\n", hostname);
 117         client = malloc(sizeof(*client));
 118         memset(client, 0, sizeof(*client));
 119
 120         client->hostname = strdup(hostname);
 121         client->fd = -1;
 122
 123         __fio_client_add_cmd_option(client, "fio");
 124
 125         flist_add(&client->list, &client_list);
 126         nr_clients++;
 127 }
 128
 129 static int fio_client_connect(struct fio_client *client)
 130 {
 131         int fd;
 132
 133         dprint(FD_NET, "connect to host %s\n", client->hostname);
 134
 135         memset(&client->addr, 0, sizeof(client->addr));
 136         client->addr.sin_family = AF_INET;
 137         client->addr.sin_port = htons(fio_net_port);
 138
 139         if (inet_aton(client->hostname, &client->addr.sin_addr) != 1) {
 140                 struct hostent *hent;
 141
 142                 hent = gethostbyname(client->hostname);
 143                 if (!hent) {
 144                         log_err("fio: gethostbyname: %s\n", strerror(errno));
 145                         return 1;
 146                 }
 147
 148                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
 149         }
 150
 151         fd = socket(AF_INET, SOCK_STREAM, 0);
 152         if (fd < 0) {
 153                 log_err("fio: socket: %s\n", strerror(errno));
 154                 return 1;
 155         }
 156
 157         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 158                 log_err("fio: connect: %s\n", strerror(errno));
 159                 log_err("fio: failed to connect to %s\n", client->hostname);
 160                 return 1;
 161         }
 162
 163         client->fd = fd;
 164         client->state = Client_connected;
 165         return 0;
 166 }
 167
 168 void fio_clients_terminate(void)
 169 {
 170         struct flist_head *entry;
 171         struct fio_client *client;
 172
 173         flist_for_each(entry, &client_list) {
 174                 client = flist_entry(entry, struct fio_client, list);
 175
 176                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
 177         }
 178 }
 179
 180 static void sig_int(int sig)
 181 {
 182         fio_clients_terminate();
 183 }
 184
 185 static void client_signal_handler(void)
 186 {
 187         struct sigaction act;
 188
 189         memset(&act, 0, sizeof(act));
 190         act.sa_handler = sig_int;
 191         act.sa_flags = SA_RESTART;
 192         sigaction(SIGINT, &act, NULL);
 193
 194         memset(&act, 0, sizeof(act));
 195         act.sa_handler = sig_int;
 196         act.sa_flags = SA_RESTART;
 197         sigaction(SIGTERM, &act, NULL);
 198 }
 199
 200 static void probe_client(struct fio_client *client)
 201 {
 202         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
 203         handle_client(client, 1);
 204 }
 205
 206 static int send_client_cmd_line(struct fio_client *client)
 207 {
 208         struct cmd_line_pdu *pdu;
 209         int i, ret;
 210
 211         pdu = malloc(sizeof(*pdu));
 212         for (i = 0; i < client->argc; i++)
 213                 strcpy((char *) pdu->argv[i], client->argv[i]);
 214
 215         pdu->argc = cpu_to_le16(client->argc);
 216         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, sizeof(*pdu));
 217         free(pdu);
 218         return ret;
 219 }
 220
 221 int fio_clients_connect(void)
 222 {
 223         struct fio_client *client;
 224         struct flist_head *entry, *tmp;
 225         int ret;
 226
 227         client_signal_handler();
 228
 229         flist_for_each_safe(entry, tmp, &client_list) {
 230                 client = flist_entry(entry, struct fio_client, list);
 231
 232                 ret = fio_client_connect(client);
 233                 if (ret) {
 234                         remove_client(client);
 235                         continue;
 236                 }
 237
 238                 probe_client(client);
 239
 240                 if (client->argc > 1)
 241                         send_client_cmd_line(client);
 242         }
 243
 244         return !nr_clients;
 245 }
 246
 247 /*
 248  * Send file contents to server backend. We could use sendfile(), but to remain
 249  * more portable lets just read/write the darn thing.
 250  */
 251 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 252 {
 253         struct stat sb;
 254         char *p, *buf;
 255         off_t len;
 256         int fd, ret;
 257
 258         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 259
 260         fd = open(filename, O_RDONLY);
 261         if (fd < 0) {
 262                 log_err("fio: job file open: %s\n", strerror(errno));
 263                 return 1;
 264         }
 265
 266         if (fstat(fd, &sb) < 0) {
 267                 log_err("fio: job file stat: %s\n", strerror(errno));
 268                 return 1;
 269         }
 270
 271         buf = malloc(sb.st_size);
 272
 273         len = sb.st_size;
 274         p = buf;
 275         do {
 276                 ret = read(fd, p, len);
 277                 if (ret > 0) {
 278                         len -= ret;
 279                         if (!len)
 280                                 break;
 281                         p += ret;
 282                         continue;
 283                 } else if (!ret)
 284                         break;
 285                 else if (errno == EAGAIN || errno == EINTR)
 286                         continue;
 287         } while (1);
 288
 289         if (len) {
 290                 log_err("fio: failed reading job file %s\n", filename);
 291                 return 1;
 292         }
 293
 294         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
 295         free(buf);
 296         return ret;
 297 }
 298
 299 int fio_clients_send_ini(const char *filename)
 300 {
 301         struct fio_client *client;
 302         struct flist_head *entry, *tmp;
 303
 304         flist_for_each_safe(entry, tmp, &client_list) {
 305                 client = flist_entry(entry, struct fio_client, list);
 306
 307                 if (fio_client_send_ini(client, filename))
 308                         remove_client(client);
 309         }
 310
 311         return !nr_clients;
 312 }
 313
 314 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 315 {
 316         dst->max_val    = le64_to_cpu(src->max_val);
 317         dst->min_val    = le64_to_cpu(src->min_val);
 318         dst->samples    = le64_to_cpu(src->samples);
 319         /* FIXME */
 320         dst->mean       = __le64_to_cpu(src->mean);
 321         dst->S          = __le64_to_cpu(src->S);
 322 }
 323
 324 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 325 {
 326         int i, j;
 327
 328         dst->error      = le32_to_cpu(src->error);
 329         dst->groupid    = le32_to_cpu(src->groupid);
 330         dst->pid        = le32_to_cpu(src->pid);
 331         dst->members    = le32_to_cpu(src->members);
 332
 333         for (i = 0; i < 2; i++) {
 334                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 335                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 336                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 337                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 338         }
 339
 340         dst->usr_time           = le64_to_cpu(src->usr_time);
 341         dst->sys_time           = le64_to_cpu(src->sys_time);
 342         dst->ctx                = le64_to_cpu(src->ctx);
 343         dst->minf               = le64_to_cpu(src->minf);
 344         dst->majf               = le64_to_cpu(src->majf);
 345         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 346         dst->percentile_list    = NULL;
 347
 348         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 349                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 350                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 351                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 352         }
 353
 354         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 355                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 356                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 357         }
 358
 359         for (i = 0; i < 2; i++)
 360                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 361                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 362
 363         for (i = 0; i < 3; i++) {
 364                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 365                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 366         }
 367
 368         dst->total_submit       = le64_to_cpu(src->total_submit);
 369         dst->total_complete     = le64_to_cpu(src->total_complete);
 370
 371         for (i = 0; i < 2; i++) {
 372                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 373                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 374         }
 375
 376         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 377         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 378         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 379         dst->first_error        = le32_to_cpu(src->first_error);
 380         dst->kb_base            = le32_to_cpu(src->kb_base);
 381 }
 382
 383 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 384 {
 385         int i;
 386
 387         for (i = 0; i < 2; i++) {
 388                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 389                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 390                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 391                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 392                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 393                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 394         }
 395
 396         dst->kb_base    = le32_to_cpu(src->kb_base);
 397         dst->groupid    = le32_to_cpu(src->groupid);
 398 }
 399
 400 static void handle_ts(struct fio_net_cmd *cmd)
 401 {
 402         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 403
 404         convert_ts(&p->ts, &p->ts);
 405         convert_gs(&p->rs, &p->rs);
 406
 407         show_thread_status(&p->ts, &p->rs);
 408 }
 409
 410 static void handle_gs(struct fio_net_cmd *cmd)
 411 {
 412         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 413
 414         convert_gs(gs, gs);
 415         show_group_stats(gs);
 416 }
 417
 418 static void handle_eta(struct fio_net_cmd *cmd)
 419 {
 420         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 421         int i;
 422
 423         je->nr_running          = le32_to_cpu(je->nr_running);
 424         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 425         je->nr_pending          = le32_to_cpu(je->nr_pending);
 426         je->files_open          = le32_to_cpu(je->files_open);
 427         je->m_rate              = le32_to_cpu(je->m_rate);
 428         je->t_rate              = le32_to_cpu(je->t_rate);
 429         je->m_iops              = le32_to_cpu(je->m_iops);
 430         je->t_iops              = le32_to_cpu(je->t_iops);
 431
 432         for (i = 0; i < 2; i++) {
 433                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 434                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 435         }
 436
 437         je->elapsed_sec         = le32_to_cpu(je->nr_running);
 438         je->eta_sec             = le64_to_cpu(je->eta_sec);
 439
 440         display_thread_status(je);
 441 }
 442
 443 static void handle_probe(struct fio_net_cmd *cmd)
 444 {
 445         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 446
 447         log_info("Probe: hostname=%s, fio ver %u.%u.%u\n", probe->hostname,
 448                         probe->fio_major, probe->fio_minor, probe->fio_patch);
 449 }
 450
 451 static int handle_client(struct fio_client *client, int one)
 452 {
 453         struct fio_net_cmd *cmd;
 454         int done = 0;
 455
 456         while ((cmd = fio_net_recv_cmd(client->fd, 1)) != NULL) {
 457                 dprint(FD_NET, "%s: got cmd op %d\n", client->hostname,
 458                                                         cmd->opcode);
 459
 460                 switch (cmd->opcode) {
 461                 case FIO_NET_CMD_QUIT:
 462                         remove_client(client);
 463                         free(cmd);
 464                         done = 1;
 465                         break;
 466                 case FIO_NET_CMD_TEXT:
 467                         fprintf(f_out, "Client <%s>: ", client->hostname);
 468                         fwrite(cmd->payload, cmd->pdu_len, 1, f_out);
 469                         fflush(f_out);
 470                         free(cmd);
 471                         break;
 472                 case FIO_NET_CMD_TS:
 473                         handle_ts(cmd);
 474                         free(cmd);
 475                         break;
 476                 case FIO_NET_CMD_GS:
 477                         handle_gs(cmd);
 478                         free(cmd);
 479                         break;
 480                 case FIO_NET_CMD_ETA:
 481                         handle_eta(cmd);
 482                         free(cmd);
 483                         break;
 484                 case FIO_NET_CMD_PROBE:
 485                         handle_probe(cmd);
 486                         free(cmd);
 487                         break;
 488                 case FIO_NET_CMD_START:
 489                         client->state = Client_started;
 490                         free(cmd);
 491                         break;
 492                 case FIO_NET_CMD_STOP:
 493                         client->state = Client_stopped;
 494                         free(cmd);
 495                         break;
 496                 default:
 497                         log_err("fio: unknown client op: %d\n", cmd->opcode);
 498                         free(cmd);
 499                         break;
 500                 }
 501
 502                 if (done || one)
 503                         break;
 504         }
 505
 506         return 0;
 507 }
 508
 509 int fio_handle_clients(void)
 510 {
 511         struct fio_client *client;
 512         struct flist_head *entry;
 513         struct pollfd *pfds;
 514         int i, ret = 0;
 515
 516         pfds = malloc(nr_clients * sizeof(struct pollfd));
 517
 518         while (!exit_backend && nr_clients) {
 519                 i = 0;
 520                 flist_for_each(entry, &client_list) {
 521                         client = flist_entry(entry, struct fio_client, list);
 522
 523                         pfds[i].fd = client->fd;
 524                         pfds[i].events = POLLIN;
 525                         i++;
 526                 }
 527
 528                 assert(i == nr_clients);
 529
 530                 do {
 531                         ret = poll(pfds, nr_clients, 100);
 532                         if (ret < 0) {
 533                                 if (errno == EINTR)
 534                                         continue;
 535                                 log_err("fio: poll clients: %s\n", strerror(errno));
 536                                 break;
 537                         } else if (!ret)
 538                                 continue;
 539                 } while (ret <= 0);
 540
 541                 for (i = 0; i < nr_clients; i++) {
 542                         if (!(pfds[i].revents & POLLIN))
 543                                 continue;
 544
 545                         client = find_client_by_fd(pfds[i].fd);
 546                         if (!client) {
 547                                 log_err("fio: unknown client\n");
 548                                 continue;
 549                         }
 550                         handle_client(client, 0);
 551                 }
 552         }
 553
 554         free(pfds);
 555         return 0;
 556 }