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         int skip_newline;
  29
  30         uint16_t argc;
  31         char **argv;
  32 };
  33
  34 enum {
  35         Client_created          = 0,
  36         Client_connected        = 1,
  37         Client_started          = 2,
  38         Client_stopped          = 3,
  39         Client_exited           = 4,
  40 };
  41
  42 static FLIST_HEAD(client_list);
  43
  44 static int handle_client(struct fio_client *client, int one);
  45
  46 static struct fio_client *find_client_by_fd(int fd)
  47 {
  48         struct fio_client *client;
  49         struct flist_head *entry;
  50
  51         flist_for_each(entry, &client_list) {
  52                 client = flist_entry(entry, struct fio_client, list);
  53
  54                 if (client->fd == fd)
  55                         return client;
  56         }
  57
  58         return NULL;
  59 }
  60
  61 static struct fio_client *find_client_by_name(const char *name)
  62 {
  63         struct fio_client *client;
  64         struct flist_head *entry;
  65
  66         flist_for_each(entry, &client_list) {
  67                 client = flist_entry(entry, struct fio_client, list);
  68
  69                 if (!strcmp(name, client->hostname))
  70                         return client;
  71         }
  72
  73         return NULL;
  74 }
  75
  76 static void remove_client(struct fio_client *client)
  77 {
  78         dprint(FD_NET, "removed client <%s>\n", client->hostname);
  79         flist_del(&client->list);
  80         nr_clients--;
  81
  82         free(client->hostname);
  83         if (client->argv)
  84                 free(client->argv);
  85
  86         free(client);
  87 }
  88
  89 static void __fio_client_add_cmd_option(struct fio_client *client,
  90                                         const char *opt)
  91 {
  92         client->argc++;
  93         client->argv = realloc(client->argv, sizeof(char *) * client->argc);
  94         client->argv[client->argc - 1] = strdup(opt);
  95 }
  96
  97 void fio_client_add_cmd_option(const char *hostname, const char *opt)
  98 {
  99         struct fio_client *client;
 100
 101         if (!hostname || !opt)
 102                 return;
 103
 104         client = find_client_by_name(hostname);
 105         if (!client) {
 106                 log_err("fio: unknown client %s\n", hostname);
 107                 return;
 108         }
 109
 110         __fio_client_add_cmd_option(client, opt);
 111 }
 112
 113 void fio_client_add(const char *hostname)
 114 {
 115         struct fio_client *client;
 116
 117         dprint(FD_NET, "added client <%s>\n", hostname);
 118         client = malloc(sizeof(*client));
 119         memset(client, 0, sizeof(*client));
 120
 121         client->hostname = strdup(hostname);
 122         client->fd = -1;
 123
 124         __fio_client_add_cmd_option(client, "fio");
 125
 126         flist_add(&client->list, &client_list);
 127         nr_clients++;
 128 }
 129
 130 static int fio_client_connect(struct fio_client *client)
 131 {
 132         int fd;
 133
 134         dprint(FD_NET, "connect to host %s\n", client->hostname);
 135
 136         memset(&client->addr, 0, sizeof(client->addr));
 137         client->addr.sin_family = AF_INET;
 138         client->addr.sin_port = htons(fio_net_port);
 139
 140         if (inet_aton(client->hostname, &client->addr.sin_addr) != 1) {
 141                 struct hostent *hent;
 142
 143                 hent = gethostbyname(client->hostname);
 144                 if (!hent) {
 145                         log_err("fio: gethostbyname: %s\n", strerror(errno));
 146                         return 1;
 147                 }
 148
 149                 memcpy(&client->addr.sin_addr, hent->h_addr, 4);
 150         }
 151
 152         fd = socket(AF_INET, SOCK_STREAM, 0);
 153         if (fd < 0) {
 154                 log_err("fio: socket: %s\n", strerror(errno));
 155                 return 1;
 156         }
 157
 158         if (connect(fd, (struct sockaddr *) &client->addr, sizeof(client->addr)) < 0) {
 159                 log_err("fio: connect: %s\n", strerror(errno));
 160                 log_err("fio: failed to connect to %s\n", client->hostname);
 161                 return 1;
 162         }
 163
 164         client->fd = fd;
 165         client->state = Client_connected;
 166         return 0;
 167 }
 168
 169 void fio_clients_terminate(void)
 170 {
 171         struct flist_head *entry;
 172         struct fio_client *client;
 173
 174         flist_for_each(entry, &client_list) {
 175                 client = flist_entry(entry, struct fio_client, list);
 176
 177                 fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_QUIT, 0);
 178         }
 179 }
 180
 181 static void sig_int(int sig)
 182 {
 183         fio_clients_terminate();
 184 }
 185
 186 static void client_signal_handler(void)
 187 {
 188         struct sigaction act;
 189
 190         memset(&act, 0, sizeof(act));
 191         act.sa_handler = sig_int;
 192         act.sa_flags = SA_RESTART;
 193         sigaction(SIGINT, &act, NULL);
 194
 195         memset(&act, 0, sizeof(act));
 196         act.sa_handler = sig_int;
 197         act.sa_flags = SA_RESTART;
 198         sigaction(SIGTERM, &act, NULL);
 199 }
 200
 201 static void probe_client(struct fio_client *client)
 202 {
 203         fio_net_send_simple_cmd(client->fd, FIO_NET_CMD_PROBE, 0);
 204         handle_client(client, 1);
 205 }
 206
 207 static int send_client_cmd_line(struct fio_client *client)
 208 {
 209         struct cmd_line_pdu *pdu;
 210         int i, ret;
 211
 212         pdu = malloc(sizeof(*pdu));
 213         for (i = 0; i < client->argc; i++)
 214                 strcpy((char *) pdu->argv[i], client->argv[i]);
 215
 216         pdu->argc = cpu_to_le16(client->argc);
 217         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOBLINE, pdu, sizeof(*pdu));
 218         free(pdu);
 219         return ret;
 220 }
 221
 222 int fio_clients_connect(void)
 223 {
 224         struct fio_client *client;
 225         struct flist_head *entry, *tmp;
 226         int ret;
 227
 228         client_signal_handler();
 229
 230         flist_for_each_safe(entry, tmp, &client_list) {
 231                 client = flist_entry(entry, struct fio_client, list);
 232
 233                 ret = fio_client_connect(client);
 234                 if (ret) {
 235                         remove_client(client);
 236                         continue;
 237                 }
 238
 239                 probe_client(client);
 240
 241                 if (client->argc > 1)
 242                         send_client_cmd_line(client);
 243         }
 244
 245         return !nr_clients;
 246 }
 247
 248 /*
 249  * Send file contents to server backend. We could use sendfile(), but to remain
 250  * more portable lets just read/write the darn thing.
 251  */
 252 static int fio_client_send_ini(struct fio_client *client, const char *filename)
 253 {
 254         struct stat sb;
 255         char *p, *buf;
 256         off_t len;
 257         int fd, ret;
 258
 259         dprint(FD_NET, "send ini %s to %s\n", filename, client->hostname);
 260
 261         fd = open(filename, O_RDONLY);
 262         if (fd < 0) {
 263                 log_err("fio: job file open: %s\n", strerror(errno));
 264                 return 1;
 265         }
 266
 267         if (fstat(fd, &sb) < 0) {
 268                 log_err("fio: job file stat: %s\n", strerror(errno));
 269                 return 1;
 270         }
 271
 272         buf = malloc(sb.st_size);
 273
 274         len = sb.st_size;
 275         p = buf;
 276         do {
 277                 ret = read(fd, p, len);
 278                 if (ret > 0) {
 279                         len -= ret;
 280                         if (!len)
 281                                 break;
 282                         p += ret;
 283                         continue;
 284                 } else if (!ret)
 285                         break;
 286                 else if (errno == EAGAIN || errno == EINTR)
 287                         continue;
 288         } while (1);
 289
 290         if (len) {
 291                 log_err("fio: failed reading job file %s\n", filename);
 292                 return 1;
 293         }
 294
 295         ret = fio_net_send_cmd(client->fd, FIO_NET_CMD_JOB, buf, sb.st_size);
 296         free(buf);
 297         return ret;
 298 }
 299
 300 int fio_clients_send_ini(const char *filename)
 301 {
 302         struct fio_client *client;
 303         struct flist_head *entry, *tmp;
 304
 305         flist_for_each_safe(entry, tmp, &client_list) {
 306                 client = flist_entry(entry, struct fio_client, list);
 307
 308                 if (fio_client_send_ini(client, filename))
 309                         remove_client(client);
 310         }
 311
 312         return !nr_clients;
 313 }
 314
 315 static void convert_io_stat(struct io_stat *dst, struct io_stat *src)
 316 {
 317         dst->max_val    = le64_to_cpu(src->max_val);
 318         dst->min_val    = le64_to_cpu(src->min_val);
 319         dst->samples    = le64_to_cpu(src->samples);
 320         /* FIXME */
 321         dst->mean       = __le64_to_cpu(src->mean);
 322         dst->S          = __le64_to_cpu(src->S);
 323 }
 324
 325 static void convert_ts(struct thread_stat *dst, struct thread_stat *src)
 326 {
 327         int i, j;
 328
 329         dst->error      = le32_to_cpu(src->error);
 330         dst->groupid    = le32_to_cpu(src->groupid);
 331         dst->pid        = le32_to_cpu(src->pid);
 332         dst->members    = le32_to_cpu(src->members);
 333
 334         for (i = 0; i < 2; i++) {
 335                 convert_io_stat(&dst->clat_stat[i], &src->clat_stat[i]);
 336                 convert_io_stat(&dst->slat_stat[i], &src->slat_stat[i]);
 337                 convert_io_stat(&dst->lat_stat[i], &src->lat_stat[i]);
 338                 convert_io_stat(&dst->bw_stat[i], &src->bw_stat[i]);
 339         }
 340
 341         dst->usr_time           = le64_to_cpu(src->usr_time);
 342         dst->sys_time           = le64_to_cpu(src->sys_time);
 343         dst->ctx                = le64_to_cpu(src->ctx);
 344         dst->minf               = le64_to_cpu(src->minf);
 345         dst->majf               = le64_to_cpu(src->majf);
 346         dst->clat_percentiles   = le64_to_cpu(src->clat_percentiles);
 347         dst->percentile_list    = NULL;
 348
 349         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 350                 dst->io_u_map[i]        = le32_to_cpu(src->io_u_map[i]);
 351                 dst->io_u_submit[i]     = le32_to_cpu(src->io_u_submit[i]);
 352                 dst->io_u_complete[i]   = le32_to_cpu(src->io_u_complete[i]);
 353         }
 354
 355         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 356                 dst->io_u_lat_u[i]      = le32_to_cpu(src->io_u_lat_u[i]);
 357                 dst->io_u_lat_m[i]      = le32_to_cpu(src->io_u_lat_m[i]);
 358         }
 359
 360         for (i = 0; i < 2; i++)
 361                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
 362                         dst->io_u_plat[i][j] = le32_to_cpu(src->io_u_plat[i][j]);
 363
 364         for (i = 0; i < 3; i++) {
 365                 dst->total_io_u[i]      = le64_to_cpu(src->total_io_u[i]);
 366                 dst->short_io_u[i]      = le64_to_cpu(src->short_io_u[i]);
 367         }
 368
 369         dst->total_submit       = le64_to_cpu(src->total_submit);
 370         dst->total_complete     = le64_to_cpu(src->total_complete);
 371
 372         for (i = 0; i < 2; i++) {
 373                 dst->io_bytes[i]        = le64_to_cpu(src->io_bytes[i]);
 374                 dst->runtime[i]         = le64_to_cpu(src->runtime[i]);
 375         }
 376
 377         dst->total_run_time     = le64_to_cpu(src->total_run_time);
 378         dst->continue_on_error  = le16_to_cpu(src->continue_on_error);
 379         dst->total_err_count    = le64_to_cpu(src->total_err_count);
 380         dst->first_error        = le32_to_cpu(src->first_error);
 381         dst->kb_base            = le32_to_cpu(src->kb_base);
 382 }
 383
 384 static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src)
 385 {
 386         int i;
 387
 388         for (i = 0; i < 2; i++) {
 389                 dst->max_run[i]         = le64_to_cpu(src->max_run[i]);
 390                 dst->min_run[i]         = le64_to_cpu(src->min_run[i]);
 391                 dst->max_bw[i]          = le64_to_cpu(src->max_bw[i]);
 392                 dst->min_bw[i]          = le64_to_cpu(src->min_bw[i]);
 393                 dst->io_kb[i]           = le64_to_cpu(src->io_kb[i]);
 394                 dst->agg[i]             = le64_to_cpu(src->agg[i]);
 395         }
 396
 397         dst->kb_base    = le32_to_cpu(src->kb_base);
 398         dst->groupid    = le32_to_cpu(src->groupid);
 399 }
 400
 401 static void handle_ts(struct fio_net_cmd *cmd)
 402 {
 403         struct cmd_ts_pdu *p = (struct cmd_ts_pdu *) cmd->payload;
 404
 405         convert_ts(&p->ts, &p->ts);
 406         convert_gs(&p->rs, &p->rs);
 407
 408         show_thread_status(&p->ts, &p->rs);
 409 }
 410
 411 static void handle_gs(struct fio_net_cmd *cmd)
 412 {
 413         struct group_run_stats *gs = (struct group_run_stats *) cmd->payload;
 414
 415         convert_gs(gs, gs);
 416         show_group_stats(gs);
 417 }
 418
 419 static void handle_eta(struct fio_net_cmd *cmd)
 420 {
 421         struct jobs_eta *je = (struct jobs_eta *) cmd->payload;
 422         int i;
 423
 424         je->nr_running          = le32_to_cpu(je->nr_running);
 425         je->nr_ramp             = le32_to_cpu(je->nr_ramp);
 426         je->nr_pending          = le32_to_cpu(je->nr_pending);
 427         je->files_open          = le32_to_cpu(je->files_open);
 428         je->m_rate              = le32_to_cpu(je->m_rate);
 429         je->t_rate              = le32_to_cpu(je->t_rate);
 430         je->m_iops              = le32_to_cpu(je->m_iops);
 431         je->t_iops              = le32_to_cpu(je->t_iops);
 432
 433         for (i = 0; i < 2; i++) {
 434                 je->rate[i]     = le32_to_cpu(je->rate[i]);
 435                 je->iops[i]     = le32_to_cpu(je->iops[i]);
 436         }
 437
 438         je->elapsed_sec         = le32_to_cpu(je->nr_running);
 439         je->eta_sec             = le64_to_cpu(je->eta_sec);
 440
 441         display_thread_status(je);
 442 }
 443
 444 static void handle_probe(struct fio_net_cmd *cmd)
 445 {
 446         struct cmd_probe_pdu *probe = (struct cmd_probe_pdu *) cmd->payload;
 447
 448         log_info("Probe: hostname=%s, fio ver %u.%u.%u\n", probe->hostname,
 449                         probe->fio_major, probe->fio_minor, probe->fio_patch);
 450 }
 451
 452 static int handle_client(struct fio_client *client, int one)
 453 {
 454         struct fio_net_cmd *cmd;
 455         int done = 0;
 456
 457         while ((cmd = fio_net_recv_cmd(client->fd, 1)) != NULL) {
 458                 dprint(FD_NET, "%s: got cmd op %d\n", client->hostname,
 459                                                         cmd->opcode);
 460
 461                 switch (cmd->opcode) {
 462                 case FIO_NET_CMD_QUIT:
 463                         remove_client(client);
 464                         free(cmd);
 465                         done = 1;
 466                         break;
 467                 case FIO_NET_CMD_TEXT: {
 468                         const char *buf = (const char *) cmd->payload;
 469
 470                         if (!client->skip_newline)
 471                                 fprintf(f_out, "Client <%s>: ", client->hostname);
 472                         fwrite(buf, cmd->pdu_len, 1, f_out);
 473                         fflush(f_out);
 474                         client->skip_newline = strchr(buf, '\n') == NULL;
 475                         free(cmd);
 476                         break;
 477                         }
 478                 case FIO_NET_CMD_TS:
 479                         handle_ts(cmd);
 480                         free(cmd);
 481                         break;
 482                 case FIO_NET_CMD_GS:
 483                         handle_gs(cmd);
 484                         free(cmd);
 485                         break;
 486                 case FIO_NET_CMD_ETA:
 487                         handle_eta(cmd);
 488                         free(cmd);
 489                         break;
 490                 case FIO_NET_CMD_PROBE:
 491                         handle_probe(cmd);
 492                         free(cmd);
 493                         break;
 494                 case FIO_NET_CMD_START:
 495                         client->state = Client_started;
 496                         free(cmd);
 497                         break;
 498                 case FIO_NET_CMD_STOP:
 499                         client->state = Client_stopped;
 500                         free(cmd);
 501                         break;
 502                 default:
 503                         log_err("fio: unknown client op: %d\n", cmd->opcode);
 504                         free(cmd);
 505                         break;
 506                 }
 507
 508                 if (done || one)
 509                         break;
 510         }
 511
 512         return 0;
 513 }
 514
 515 int fio_handle_clients(void)
 516 {
 517         struct fio_client *client;
 518         struct flist_head *entry;
 519         struct pollfd *pfds;
 520         int i, ret = 0;
 521
 522         pfds = malloc(nr_clients * sizeof(struct pollfd));
 523
 524         while (!exit_backend && nr_clients) {
 525                 i = 0;
 526                 flist_for_each(entry, &client_list) {
 527                         client = flist_entry(entry, struct fio_client, list);
 528
 529                         pfds[i].fd = client->fd;
 530                         pfds[i].events = POLLIN;
 531                         i++;
 532                 }
 533
 534                 assert(i == nr_clients);
 535
 536                 do {
 537                         ret = poll(pfds, nr_clients, 100);
 538                         if (ret < 0) {
 539                                 if (errno == EINTR)
 540                                         continue;
 541                                 log_err("fio: poll clients: %s\n", strerror(errno));
 542                                 break;
 543                         } else if (!ret)
 544                                 continue;
 545                 } while (ret <= 0);
 546
 547                 for (i = 0; i < nr_clients; i++) {
 548                         if (!(pfds[i].revents & POLLIN))
 549                                 continue;
 550
 551                         client = find_client_by_fd(pfds[i].fd);
 552                         if (!client) {
 553                                 log_err("fio: unknown client\n");
 554                                 continue;
 555                         }
 556                         handle_client(client, 0);
 557                 }
 558         }
 559
 560         free(pfds);
 561         return 0;
 562 }