| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <stdarg.h> |
| 4 | #include <unistd.h> |
| 5 | #include <limits.h> |
| 6 | #include <errno.h> |
| 7 | #include <fcntl.h> |
| 8 | #include <sys/poll.h> |
| 9 | #include <sys/types.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 | #include <syslog.h> |
| 16 | |
| 17 | #include "fio.h" |
| 18 | #include "server.h" |
| 19 | #include "crc/crc16.h" |
| 20 | |
| 21 | int fio_net_port = 8765; |
| 22 | |
| 23 | int exit_backend = 0; |
| 24 | |
| 25 | static int server_fd = -1; |
| 26 | |
| 27 | int fio_send_data(int sk, const void *p, unsigned int len) |
| 28 | { |
| 29 | assert(len <= sizeof(struct fio_net_cmd) + FIO_SERVER_MAX_PDU); |
| 30 | |
| 31 | do { |
| 32 | int ret = send(sk, p, len, 0); |
| 33 | |
| 34 | if (ret > 0) { |
| 35 | len -= ret; |
| 36 | if (!len) |
| 37 | break; |
| 38 | p += ret; |
| 39 | continue; |
| 40 | } else if (!ret) |
| 41 | break; |
| 42 | else if (errno == EAGAIN || errno == EINTR) |
| 43 | continue; |
| 44 | } while (!exit_backend); |
| 45 | |
| 46 | if (!len) |
| 47 | return 0; |
| 48 | |
| 49 | return 1; |
| 50 | } |
| 51 | |
| 52 | int fio_recv_data(int sk, void *p, unsigned int len) |
| 53 | { |
| 54 | do { |
| 55 | int ret = recv(sk, p, len, MSG_WAITALL); |
| 56 | |
| 57 | if (ret > 0) { |
| 58 | len -= ret; |
| 59 | if (!len) |
| 60 | break; |
| 61 | p += ret; |
| 62 | continue; |
| 63 | } else if (!ret) |
| 64 | break; |
| 65 | else if (errno == EAGAIN || errno == EINTR) |
| 66 | continue; |
| 67 | } while (!exit_backend); |
| 68 | |
| 69 | if (!len) |
| 70 | return 0; |
| 71 | |
| 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | static int verify_convert_cmd(struct fio_net_cmd *cmd) |
| 76 | { |
| 77 | uint16_t crc; |
| 78 | |
| 79 | cmd->cmd_crc16 = le16_to_cpu(cmd->cmd_crc16); |
| 80 | cmd->pdu_crc16 = le16_to_cpu(cmd->pdu_crc16); |
| 81 | |
| 82 | crc = crc16(cmd, FIO_NET_CMD_CRC_SZ); |
| 83 | if (crc != cmd->cmd_crc16) { |
| 84 | log_err("fio: server bad crc on command (got %x, wanted %x)\n", |
| 85 | cmd->cmd_crc16, crc); |
| 86 | return 1; |
| 87 | } |
| 88 | |
| 89 | cmd->version = le16_to_cpu(cmd->version); |
| 90 | cmd->opcode = le16_to_cpu(cmd->opcode); |
| 91 | cmd->flags = le32_to_cpu(cmd->flags); |
| 92 | cmd->serial = le64_to_cpu(cmd->serial); |
| 93 | cmd->pdu_len = le32_to_cpu(cmd->pdu_len); |
| 94 | |
| 95 | switch (cmd->version) { |
| 96 | case FIO_SERVER_VER1: |
| 97 | break; |
| 98 | default: |
| 99 | log_err("fio: bad server cmd version %d\n", cmd->version); |
| 100 | return 1; |
| 101 | } |
| 102 | |
| 103 | if (cmd->pdu_len > FIO_SERVER_MAX_PDU) { |
| 104 | log_err("fio: command payload too large: %u\n", cmd->pdu_len); |
| 105 | return 1; |
| 106 | } |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | /* |
| 112 | * Read (and defragment, if necessary) incoming commands |
| 113 | */ |
| 114 | struct fio_net_cmd *fio_net_recv_cmd(int sk) |
| 115 | { |
| 116 | struct fio_net_cmd cmd, *cmdret = NULL; |
| 117 | size_t cmd_size = 0, pdu_offset = 0; |
| 118 | uint16_t crc; |
| 119 | int ret, first = 1; |
| 120 | void *pdu = NULL; |
| 121 | |
| 122 | do { |
| 123 | ret = fio_recv_data(sk, &cmd, sizeof(cmd)); |
| 124 | if (ret) |
| 125 | break; |
| 126 | |
| 127 | /* We have a command, verify it and swap if need be */ |
| 128 | ret = verify_convert_cmd(&cmd); |
| 129 | if (ret) |
| 130 | break; |
| 131 | |
| 132 | if (first) |
| 133 | cmd_size = sizeof(cmd) + cmd.pdu_len; |
| 134 | else |
| 135 | cmd_size += cmd.pdu_len; |
| 136 | |
| 137 | cmdret = realloc(cmdret, cmd_size); |
| 138 | pdu = (void *) cmdret->payload; |
| 139 | |
| 140 | if (first) |
| 141 | memcpy(cmdret, &cmd, sizeof(cmd)); |
| 142 | else |
| 143 | assert(cmdret->opcode == cmd.opcode); |
| 144 | |
| 145 | if (!cmd.pdu_len) |
| 146 | break; |
| 147 | |
| 148 | /* There's payload, get it */ |
| 149 | pdu = (void *) cmdret->payload + pdu_offset; |
| 150 | ret = fio_recv_data(sk, pdu, cmd.pdu_len); |
| 151 | if (ret) |
| 152 | break; |
| 153 | |
| 154 | /* Verify payload crc */ |
| 155 | crc = crc16(pdu, cmd.pdu_len); |
| 156 | if (crc != cmd.pdu_crc16) { |
| 157 | log_err("fio: server bad crc on payload "); |
| 158 | log_err("(got %x, wanted %x)\n", cmd.pdu_crc16, crc); |
| 159 | ret = 1; |
| 160 | break; |
| 161 | } |
| 162 | |
| 163 | pdu_offset += cmd.pdu_len; |
| 164 | cmdret->pdu_len += cmd.pdu_len; |
| 165 | first = 0; |
| 166 | } while (cmd.flags & FIO_NET_CMD_F_MORE); |
| 167 | |
| 168 | if (ret) { |
| 169 | free(cmdret); |
| 170 | cmdret = NULL; |
| 171 | } |
| 172 | |
| 173 | if (cmdret) |
| 174 | cmdret->flags &= ~FIO_NET_CMD_F_MORE; |
| 175 | |
| 176 | return cmdret; |
| 177 | } |
| 178 | |
| 179 | void fio_net_cmd_crc(struct fio_net_cmd *cmd) |
| 180 | { |
| 181 | uint32_t pdu_len; |
| 182 | |
| 183 | cmd->cmd_crc16 = __cpu_to_le16(crc16(cmd, FIO_NET_CMD_CRC_SZ)); |
| 184 | |
| 185 | pdu_len = le32_to_cpu(cmd->pdu_len); |
| 186 | if (pdu_len) |
| 187 | cmd->pdu_crc16 = __cpu_to_le16(crc16(cmd->payload, pdu_len)); |
| 188 | } |
| 189 | |
| 190 | int fio_net_send_cmd(int fd, uint16_t opcode, const void *buf, off_t size) |
| 191 | { |
| 192 | struct fio_net_cmd *cmd; |
| 193 | size_t this_len; |
| 194 | int ret; |
| 195 | |
| 196 | do { |
| 197 | this_len = size; |
| 198 | if (this_len > FIO_SERVER_MAX_PDU) |
| 199 | this_len = FIO_SERVER_MAX_PDU; |
| 200 | |
| 201 | cmd = malloc(sizeof(*cmd) + this_len); |
| 202 | |
| 203 | fio_init_net_cmd(cmd, opcode, buf, this_len); |
| 204 | |
| 205 | if (this_len < size) |
| 206 | cmd->flags = __cpu_to_le32(FIO_NET_CMD_F_MORE); |
| 207 | |
| 208 | fio_net_cmd_crc(cmd); |
| 209 | |
| 210 | ret = fio_send_data(fd, cmd, sizeof(*cmd) + this_len); |
| 211 | free(cmd); |
| 212 | size -= this_len; |
| 213 | buf += this_len; |
| 214 | } while (!ret && size); |
| 215 | |
| 216 | return ret; |
| 217 | } |
| 218 | |
| 219 | static int send_simple_command(int sk, uint16_t opcode, uint64_t serial) |
| 220 | { |
| 221 | struct fio_net_cmd cmd = { |
| 222 | .version = __cpu_to_le16(FIO_SERVER_VER1), |
| 223 | .opcode = cpu_to_le16(opcode), |
| 224 | .serial = cpu_to_le64(serial), |
| 225 | }; |
| 226 | |
| 227 | fio_net_cmd_crc(&cmd); |
| 228 | |
| 229 | return fio_send_data(sk, &cmd, sizeof(cmd)); |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * Send an ack for this command |
| 234 | */ |
| 235 | static int ack_command(int sk, struct fio_net_cmd *cmd) |
| 236 | { |
| 237 | #if 0 |
| 238 | return send_simple_command(sk, FIO_NET_CMD_ACK, cmd->serial); |
| 239 | #else |
| 240 | return 0; |
| 241 | #endif |
| 242 | } |
| 243 | |
| 244 | #if 0 |
| 245 | static int nak_command(int sk, struct fio_net_cmd *cmd) |
| 246 | { |
| 247 | return send_simple_command(sk, FIO_NET_CMD_NAK, cmd->serial); |
| 248 | } |
| 249 | #endif |
| 250 | |
| 251 | static int send_quit_command(void) |
| 252 | { |
| 253 | dprint(FD_NET, "server: sending quit\n"); |
| 254 | return send_simple_command(server_fd, FIO_NET_CMD_QUIT, 0); |
| 255 | } |
| 256 | |
| 257 | static int handle_cur_job(struct fio_net_cmd *cmd) |
| 258 | { |
| 259 | void *buf = cmd->payload; |
| 260 | int ret; |
| 261 | |
| 262 | parse_jobs_ini(buf, 1, 0); |
| 263 | ret = exec_run(); |
| 264 | send_quit_command(); |
| 265 | reset_fio_state(); |
| 266 | return ret; |
| 267 | } |
| 268 | |
| 269 | static int handle_command(struct fio_net_cmd *cmd) |
| 270 | { |
| 271 | int ret; |
| 272 | |
| 273 | dprint(FD_NET, "server: got opcode %d\n", cmd->opcode); |
| 274 | |
| 275 | switch (cmd->opcode) { |
| 276 | case FIO_NET_CMD_QUIT: |
| 277 | return 1; |
| 278 | case FIO_NET_CMD_EXIT: |
| 279 | exit_backend = 1; |
| 280 | return 1; |
| 281 | case FIO_NET_CMD_ACK: |
| 282 | return 0; |
| 283 | case FIO_NET_CMD_NAK: |
| 284 | return 1; |
| 285 | case FIO_NET_CMD_JOB: |
| 286 | ret = handle_cur_job(cmd); |
| 287 | break; |
| 288 | default: |
| 289 | log_err("fio: unknown opcode: %d\n", cmd->opcode); |
| 290 | ret = 1; |
| 291 | } |
| 292 | |
| 293 | return ret; |
| 294 | } |
| 295 | |
| 296 | static int handle_connection(int sk) |
| 297 | { |
| 298 | struct fio_net_cmd *cmd = NULL; |
| 299 | int ret = 0; |
| 300 | |
| 301 | /* read forever */ |
| 302 | while (!exit_backend) { |
| 303 | cmd = fio_net_recv_cmd(sk); |
| 304 | if (!cmd) { |
| 305 | ret = 1; |
| 306 | break; |
| 307 | } |
| 308 | |
| 309 | ret = ack_command(sk, cmd); |
| 310 | if (ret) |
| 311 | break; |
| 312 | |
| 313 | ret = handle_command(cmd); |
| 314 | if (ret) |
| 315 | break; |
| 316 | |
| 317 | free(cmd); |
| 318 | cmd = NULL; |
| 319 | } |
| 320 | |
| 321 | if (cmd) |
| 322 | free(cmd); |
| 323 | |
| 324 | return ret; |
| 325 | } |
| 326 | |
| 327 | static int accept_loop(int listen_sk) |
| 328 | { |
| 329 | struct sockaddr addr; |
| 330 | unsigned int len = sizeof(addr); |
| 331 | struct pollfd pfd; |
| 332 | int ret, sk, flags, exitval = 0; |
| 333 | |
| 334 | flags = fcntl(listen_sk, F_GETFL); |
| 335 | flags |= O_NONBLOCK; |
| 336 | fcntl(listen_sk, F_SETFL, flags); |
| 337 | again: |
| 338 | pfd.fd = listen_sk; |
| 339 | pfd.events = POLLIN; |
| 340 | do { |
| 341 | ret = poll(&pfd, 1, 100); |
| 342 | if (ret < 0) { |
| 343 | if (errno == EINTR) |
| 344 | break; |
| 345 | log_err("fio: poll: %s\n", strerror(errno)); |
| 346 | goto out; |
| 347 | } else if (!ret) |
| 348 | continue; |
| 349 | |
| 350 | if (pfd.revents & POLLIN) |
| 351 | break; |
| 352 | } while (!exit_backend); |
| 353 | |
| 354 | if (exit_backend) |
| 355 | goto out; |
| 356 | |
| 357 | sk = accept(listen_sk, &addr, &len); |
| 358 | if (sk < 0) { |
| 359 | log_err("fio: accept: %s\n", strerror(errno)); |
| 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | dprint(FD_NET, "server got a connection\n"); |
| 364 | |
| 365 | server_fd = sk; |
| 366 | |
| 367 | exitval = handle_connection(sk); |
| 368 | |
| 369 | server_fd = -1; |
| 370 | close(sk); |
| 371 | |
| 372 | if (!exit_backend) |
| 373 | goto again; |
| 374 | |
| 375 | out: |
| 376 | return exitval; |
| 377 | } |
| 378 | |
| 379 | static int fio_server(void) |
| 380 | { |
| 381 | struct sockaddr_in saddr_in; |
| 382 | struct sockaddr addr; |
| 383 | unsigned int len; |
| 384 | int sk, opt, ret; |
| 385 | |
| 386 | dprint(FD_NET, "starting server\n"); |
| 387 | |
| 388 | sk = socket(AF_INET, SOCK_STREAM, 0); |
| 389 | if (sk < 0) { |
| 390 | log_err("fio: socket: %s\n", strerror(errno)); |
| 391 | return -1; |
| 392 | } |
| 393 | |
| 394 | opt = 1; |
| 395 | if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) { |
| 396 | log_err("fio: setsockopt: %s\n", strerror(errno)); |
| 397 | return -1; |
| 398 | } |
| 399 | #ifdef SO_REUSEPORT |
| 400 | if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) { |
| 401 | log_err("fio: setsockopt: %s\n", strerror(errno)); |
| 402 | return 1; |
| 403 | } |
| 404 | #endif |
| 405 | |
| 406 | saddr_in.sin_family = AF_INET; |
| 407 | saddr_in.sin_addr.s_addr = htonl(INADDR_ANY); |
| 408 | saddr_in.sin_port = htons(fio_net_port); |
| 409 | |
| 410 | if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) { |
| 411 | log_err("fio: bind: %s\n", strerror(errno)); |
| 412 | return -1; |
| 413 | } |
| 414 | |
| 415 | if (listen(sk, 1) < 0) { |
| 416 | log_err("fio: listen: %s\n", strerror(errno)); |
| 417 | return -1; |
| 418 | } |
| 419 | |
| 420 | len = sizeof(addr); |
| 421 | if (getsockname(sk, &addr, &len) < 0) { |
| 422 | log_err("fio: getsockname: %s\n", strerror(errno)); |
| 423 | return -1; |
| 424 | } |
| 425 | |
| 426 | ret = accept_loop(sk); |
| 427 | close(sk); |
| 428 | return ret; |
| 429 | } |
| 430 | |
| 431 | int fio_server_text_output(const char *buf, unsigned int len) |
| 432 | { |
| 433 | if (server_fd != -1) |
| 434 | return fio_net_send_cmd(server_fd, FIO_NET_CMD_TEXT, buf, len); |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | static void convert_io_stat(struct io_stat *dst, struct io_stat *src) |
| 440 | { |
| 441 | dst->max_val = cpu_to_le64(src->max_val); |
| 442 | dst->min_val = cpu_to_le64(src->min_val); |
| 443 | dst->samples = cpu_to_le64(src->samples); |
| 444 | /* FIXME */ |
| 445 | dst->mean = __cpu_to_le64(src->mean); |
| 446 | dst->S = __cpu_to_le64(src->S); |
| 447 | } |
| 448 | |
| 449 | static void convert_gs(struct group_run_stats *dst, struct group_run_stats *src) |
| 450 | { |
| 451 | int i; |
| 452 | |
| 453 | for (i = 0; i < 2; i++) { |
| 454 | dst->max_run[i] = cpu_to_le64(src->max_run[i]); |
| 455 | dst->min_run[i] = cpu_to_le64(src->min_run[i]); |
| 456 | dst->max_bw[i] = cpu_to_le64(src->max_bw[i]); |
| 457 | dst->min_bw[i] = cpu_to_le64(src->min_bw[i]); |
| 458 | dst->io_kb[i] = cpu_to_le64(src->io_kb[i]); |
| 459 | dst->agg[i] = cpu_to_le64(src->agg[i]); |
| 460 | } |
| 461 | |
| 462 | dst->kb_base = cpu_to_le32(src->kb_base); |
| 463 | dst->groupid = cpu_to_le32(src->groupid); |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * Send a CMD_TS, which packs struct thread_stat and group_run_stats |
| 468 | * into a single payload. |
| 469 | */ |
| 470 | void fio_server_send_ts(struct thread_stat *ts, struct group_run_stats *rs) |
| 471 | { |
| 472 | struct cmd_ts_pdu p; |
| 473 | int i, j; |
| 474 | |
| 475 | strcpy(p.ts.name, ts->name); |
| 476 | strcpy(p.ts.verror, ts->verror); |
| 477 | strcpy(p.ts.description, ts->description); |
| 478 | |
| 479 | p.ts.error = cpu_to_le32(ts->error); |
| 480 | p.ts.groupid = cpu_to_le32(ts->groupid); |
| 481 | p.ts.pid = cpu_to_le32(ts->pid); |
| 482 | p.ts.members = cpu_to_le32(ts->members); |
| 483 | |
| 484 | for (i = 0; i < 2; i++) { |
| 485 | convert_io_stat(&p.ts.clat_stat[i], &ts->clat_stat[i]); |
| 486 | convert_io_stat(&p.ts.slat_stat[i], &ts->slat_stat[i]); |
| 487 | convert_io_stat(&p.ts.lat_stat[i], &ts->lat_stat[i]); |
| 488 | convert_io_stat(&p.ts.bw_stat[i], &ts->bw_stat[i]); |
| 489 | } |
| 490 | |
| 491 | p.ts.usr_time = cpu_to_le64(ts->usr_time); |
| 492 | p.ts.sys_time = cpu_to_le64(ts->sys_time); |
| 493 | p.ts.ctx = cpu_to_le64(ts->ctx); |
| 494 | p.ts.minf = cpu_to_le64(ts->minf); |
| 495 | p.ts.majf = cpu_to_le64(ts->majf); |
| 496 | p.ts.clat_percentiles = cpu_to_le64(ts->clat_percentiles); |
| 497 | p.ts.percentile_list = NULL; |
| 498 | |
| 499 | for (i = 0; i < FIO_IO_U_MAP_NR; i++) { |
| 500 | p.ts.io_u_map[i] = cpu_to_le32(ts->io_u_map[i]); |
| 501 | p.ts.io_u_submit[i] = cpu_to_le32(ts->io_u_submit[i]); |
| 502 | p.ts.io_u_complete[i] = cpu_to_le32(ts->io_u_complete[i]); |
| 503 | } |
| 504 | |
| 505 | for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) { |
| 506 | p.ts.io_u_lat_u[i] = cpu_to_le32(ts->io_u_lat_u[i]); |
| 507 | p.ts.io_u_lat_m[i] = cpu_to_le32(ts->io_u_lat_m[i]); |
| 508 | } |
| 509 | |
| 510 | for (i = 0; i < 2; i++) |
| 511 | for (j = 0; j < FIO_IO_U_PLAT_NR; j++) |
| 512 | p.ts.io_u_plat[i][j] = cpu_to_le32(ts->io_u_plat[i][j]); |
| 513 | |
| 514 | for (i = 0; i < 3; i++) { |
| 515 | p.ts.total_io_u[i] = cpu_to_le64(ts->total_io_u[i]); |
| 516 | p.ts.short_io_u[i] = cpu_to_le64(ts->total_io_u[i]); |
| 517 | } |
| 518 | |
| 519 | p.ts.total_submit = cpu_to_le64(ts->total_submit); |
| 520 | p.ts.total_complete = cpu_to_le64(ts->total_complete); |
| 521 | |
| 522 | for (i = 0; i < 2; i++) { |
| 523 | p.ts.io_bytes[i] = cpu_to_le64(ts->io_bytes[i]); |
| 524 | p.ts.runtime[i] = cpu_to_le64(ts->runtime[i]); |
| 525 | } |
| 526 | |
| 527 | p.ts.total_run_time = cpu_to_le64(ts->total_run_time); |
| 528 | p.ts.continue_on_error = cpu_to_le16(ts->continue_on_error); |
| 529 | p.ts.total_err_count = cpu_to_le64(ts->total_err_count); |
| 530 | p.ts.first_error = cpu_to_le32(ts->first_error); |
| 531 | p.ts.kb_base = cpu_to_le32(ts->kb_base); |
| 532 | |
| 533 | convert_gs(&p.rs, rs); |
| 534 | |
| 535 | fio_net_send_cmd(server_fd, FIO_NET_CMD_TS, &p, sizeof(p)); |
| 536 | } |
| 537 | |
| 538 | void fio_server_send_gs(struct group_run_stats *rs) |
| 539 | { |
| 540 | struct group_run_stats gs; |
| 541 | |
| 542 | convert_gs(&gs, rs); |
| 543 | fio_net_send_cmd(server_fd, FIO_NET_CMD_GS, &gs, sizeof(gs)); |
| 544 | } |
| 545 | |
| 546 | int fio_server_log(const char *format, ...) |
| 547 | { |
| 548 | char buffer[1024]; |
| 549 | va_list args; |
| 550 | size_t len; |
| 551 | |
| 552 | va_start(args, format); |
| 553 | len = vsnprintf(buffer, sizeof(buffer), format, args); |
| 554 | va_end(args); |
| 555 | |
| 556 | return fio_server_text_output(buffer, len); |
| 557 | } |
| 558 | |
| 559 | int fio_start_server(int daemonize) |
| 560 | { |
| 561 | pid_t pid; |
| 562 | |
| 563 | if (!daemonize) |
| 564 | return fio_server(); |
| 565 | |
| 566 | openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER); |
| 567 | pid = fork(); |
| 568 | if (pid < 0) { |
| 569 | syslog(LOG_ERR, "failed server fork"); |
| 570 | return 1; |
| 571 | } else if (pid) |
| 572 | exit(0); |
| 573 | |
| 574 | setsid(); |
| 575 | close(STDIN_FILENO); |
| 576 | close(STDOUT_FILENO); |
| 577 | close(STDERR_FILENO); |
| 578 | f_out = NULL; |
| 579 | f_err = NULL; |
| 580 | log_syslog = 1; |
| 581 | return fio_server(); |
| 582 | } |