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