1 /* 2 * QEMU Guest Agent POSIX-specific command implementations 3 * 4 * Copyright IBM Corp. 2011 5 * 6 * Authors: 7 * Michael Roth <mdroth@linux.vnet.ibm.com> 8 * Michal Privoznik <mprivozn@redhat.com> 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2 or later. 11 * See the COPYING file in the top-level directory. 12 */ 13 14 #include "qemu/osdep.h" 15 #include <sys/ioctl.h> 16 #include <sys/utsname.h> 17 #include <sys/wait.h> 18 #include <dirent.h> 19 #include "qga-qapi-commands.h" 20 #include "qapi/error.h" 21 #include "qapi/qmp/qerror.h" 22 #include "qemu/host-utils.h" 23 #include "qemu/sockets.h" 24 #include "qemu/base64.h" 25 #include "qemu/cutils.h" 26 #include "commands-common.h" 27 #include "block/nvme.h" 28 #include "cutils.h" 29 30 #ifdef HAVE_UTMPX 31 #include <utmpx.h> 32 #endif 33 34 #if defined(__linux__) 35 #include <mntent.h> 36 #include <sys/statvfs.h> 37 #include <linux/nvme_ioctl.h> 38 39 #ifdef CONFIG_LIBUDEV 40 #include <libudev.h> 41 #endif 42 #endif 43 44 #ifdef HAVE_GETIFADDRS 45 #include <arpa/inet.h> 46 #include <sys/socket.h> 47 #include <net/if.h> 48 #include <net/ethernet.h> 49 #include <sys/types.h> 50 #ifdef CONFIG_SOLARIS 51 #include <sys/sockio.h> 52 #endif 53 #endif 54 55 static void ga_wait_child(pid_t pid, int *status, Error **errp) 56 { 57 pid_t rpid; 58 59 *status = 0; 60 61 do { 62 rpid = waitpid(pid, status, 0); 63 } while (rpid == -1 && errno == EINTR); 64 65 if (rpid == -1) { 66 error_setg_errno(errp, errno, "failed to wait for child (pid: %d)", 67 pid); 68 return; 69 } 70 71 g_assert(rpid == pid); 72 } 73 74 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp) 75 { 76 const char *shutdown_flag; 77 Error *local_err = NULL; 78 pid_t pid; 79 int status; 80 81 #ifdef CONFIG_SOLARIS 82 const char *powerdown_flag = "-i5"; 83 const char *halt_flag = "-i0"; 84 const char *reboot_flag = "-i6"; 85 #elif defined(CONFIG_BSD) 86 const char *powerdown_flag = "-p"; 87 const char *halt_flag = "-h"; 88 const char *reboot_flag = "-r"; 89 #else 90 const char *powerdown_flag = "-P"; 91 const char *halt_flag = "-H"; 92 const char *reboot_flag = "-r"; 93 #endif 94 95 slog("guest-shutdown called, mode: %s", mode); 96 if (!has_mode || strcmp(mode, "powerdown") == 0) { 97 shutdown_flag = powerdown_flag; 98 } else if (strcmp(mode, "halt") == 0) { 99 shutdown_flag = halt_flag; 100 } else if (strcmp(mode, "reboot") == 0) { 101 shutdown_flag = reboot_flag; 102 } else { 103 error_setg(errp, 104 "mode is invalid (valid values are: halt|powerdown|reboot"); 105 return; 106 } 107 108 pid = fork(); 109 if (pid == 0) { 110 /* child, start the shutdown */ 111 setsid(); 112 reopen_fd_to_null(0); 113 reopen_fd_to_null(1); 114 reopen_fd_to_null(2); 115 116 #ifdef CONFIG_SOLARIS 117 execl("/sbin/shutdown", "shutdown", shutdown_flag, "-g0", "-y", 118 "hypervisor initiated shutdown", (char *)NULL); 119 #elif defined(CONFIG_BSD) 120 execl("/sbin/shutdown", "shutdown", shutdown_flag, "+0", 121 "hypervisor initiated shutdown", (char *)NULL); 122 #else 123 execl("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0", 124 "hypervisor initiated shutdown", (char *)NULL); 125 #endif 126 _exit(EXIT_FAILURE); 127 } else if (pid < 0) { 128 error_setg_errno(errp, errno, "failed to create child process"); 129 return; 130 } 131 132 ga_wait_child(pid, &status, &local_err); 133 if (local_err) { 134 error_propagate(errp, local_err); 135 return; 136 } 137 138 if (!WIFEXITED(status)) { 139 error_setg(errp, "child process has terminated abnormally"); 140 return; 141 } 142 143 if (WEXITSTATUS(status)) { 144 error_setg(errp, "child process has failed to shutdown"); 145 return; 146 } 147 148 /* succeeded */ 149 } 150 151 void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp) 152 { 153 int ret; 154 int status; 155 pid_t pid; 156 Error *local_err = NULL; 157 struct timeval tv; 158 static const char hwclock_path[] = "/sbin/hwclock"; 159 static int hwclock_available = -1; 160 161 if (hwclock_available < 0) { 162 hwclock_available = (access(hwclock_path, X_OK) == 0); 163 } 164 165 if (!hwclock_available) { 166 error_setg(errp, QERR_UNSUPPORTED); 167 return; 168 } 169 170 /* If user has passed a time, validate and set it. */ 171 if (has_time) { 172 GDate date = { 0, }; 173 174 /* year-2038 will overflow in case time_t is 32bit */ 175 if (time_ns / 1000000000 != (time_t)(time_ns / 1000000000)) { 176 error_setg(errp, "Time %" PRId64 " is too large", time_ns); 177 return; 178 } 179 180 tv.tv_sec = time_ns / 1000000000; 181 tv.tv_usec = (time_ns % 1000000000) / 1000; 182 g_date_set_time_t(&date, tv.tv_sec); 183 if (date.year < 1970 || date.year >= 2070) { 184 error_setg_errno(errp, errno, "Invalid time"); 185 return; 186 } 187 188 ret = settimeofday(&tv, NULL); 189 if (ret < 0) { 190 error_setg_errno(errp, errno, "Failed to set time to guest"); 191 return; 192 } 193 } 194 195 /* Now, if user has passed a time to set and the system time is set, we 196 * just need to synchronize the hardware clock. However, if no time was 197 * passed, user is requesting the opposite: set the system time from the 198 * hardware clock (RTC). */ 199 pid = fork(); 200 if (pid == 0) { 201 setsid(); 202 reopen_fd_to_null(0); 203 reopen_fd_to_null(1); 204 reopen_fd_to_null(2); 205 206 /* Use '/sbin/hwclock -w' to set RTC from the system time, 207 * or '/sbin/hwclock -s' to set the system time from RTC. */ 208 execl(hwclock_path, "hwclock", has_time ? "-w" : "-s", NULL); 209 _exit(EXIT_FAILURE); 210 } else if (pid < 0) { 211 error_setg_errno(errp, errno, "failed to create child process"); 212 return; 213 } 214 215 ga_wait_child(pid, &status, &local_err); 216 if (local_err) { 217 error_propagate(errp, local_err); 218 return; 219 } 220 221 if (!WIFEXITED(status)) { 222 error_setg(errp, "child process has terminated abnormally"); 223 return; 224 } 225 226 if (WEXITSTATUS(status)) { 227 error_setg(errp, "hwclock failed to set hardware clock to system time"); 228 return; 229 } 230 } 231 232 typedef enum { 233 RW_STATE_NEW, 234 RW_STATE_READING, 235 RW_STATE_WRITING, 236 } RwState; 237 238 struct GuestFileHandle { 239 uint64_t id; 240 FILE *fh; 241 RwState state; 242 QTAILQ_ENTRY(GuestFileHandle) next; 243 }; 244 245 static struct { 246 QTAILQ_HEAD(, GuestFileHandle) filehandles; 247 } guest_file_state = { 248 .filehandles = QTAILQ_HEAD_INITIALIZER(guest_file_state.filehandles), 249 }; 250 251 static int64_t guest_file_handle_add(FILE *fh, Error **errp) 252 { 253 GuestFileHandle *gfh; 254 int64_t handle; 255 256 handle = ga_get_fd_handle(ga_state, errp); 257 if (handle < 0) { 258 return -1; 259 } 260 261 gfh = g_new0(GuestFileHandle, 1); 262 gfh->id = handle; 263 gfh->fh = fh; 264 QTAILQ_INSERT_TAIL(&guest_file_state.filehandles, gfh, next); 265 266 return handle; 267 } 268 269 GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp) 270 { 271 GuestFileHandle *gfh; 272 273 QTAILQ_FOREACH(gfh, &guest_file_state.filehandles, next) 274 { 275 if (gfh->id == id) { 276 return gfh; 277 } 278 } 279 280 error_setg(errp, "handle '%" PRId64 "' has not been found", id); 281 return NULL; 282 } 283 284 typedef const char * const ccpc; 285 286 #ifndef O_BINARY 287 #define O_BINARY 0 288 #endif 289 290 /* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */ 291 static const struct { 292 ccpc *forms; 293 int oflag_base; 294 } guest_file_open_modes[] = { 295 { (ccpc[]){ "r", NULL }, O_RDONLY }, 296 { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY }, 297 { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC }, 298 { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY }, 299 { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND }, 300 { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY }, 301 { (ccpc[]){ "r+", NULL }, O_RDWR }, 302 { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY }, 303 { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC }, 304 { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY }, 305 { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND }, 306 { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY } 307 }; 308 309 static int 310 find_open_flag(const char *mode_str, Error **errp) 311 { 312 unsigned mode; 313 314 for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) { 315 ccpc *form; 316 317 form = guest_file_open_modes[mode].forms; 318 while (*form != NULL && strcmp(*form, mode_str) != 0) { 319 ++form; 320 } 321 if (*form != NULL) { 322 break; 323 } 324 } 325 326 if (mode == ARRAY_SIZE(guest_file_open_modes)) { 327 error_setg(errp, "invalid file open mode '%s'", mode_str); 328 return -1; 329 } 330 return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK; 331 } 332 333 #define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \ 334 S_IRGRP | S_IWGRP | \ 335 S_IROTH | S_IWOTH) 336 337 static FILE * 338 safe_open_or_create(const char *path, const char *mode, Error **errp) 339 { 340 int oflag; 341 int fd = -1; 342 FILE *f = NULL; 343 344 oflag = find_open_flag(mode, errp); 345 if (oflag < 0) { 346 goto end; 347 } 348 349 /* If the caller wants / allows creation of a new file, we implement it 350 * with a two step process: open() + (open() / fchmod()). 351 * 352 * First we insist on creating the file exclusively as a new file. If 353 * that succeeds, we're free to set any file-mode bits on it. (The 354 * motivation is that we want to set those file-mode bits independently 355 * of the current umask.) 356 * 357 * If the exclusive creation fails because the file already exists 358 * (EEXIST is not possible for any other reason), we just attempt to 359 * open the file, but in this case we won't be allowed to change the 360 * file-mode bits on the preexistent file. 361 * 362 * The pathname should never disappear between the two open()s in 363 * practice. If it happens, then someone very likely tried to race us. 364 * In this case just go ahead and report the ENOENT from the second 365 * open() to the caller. 366 * 367 * If the caller wants to open a preexistent file, then the first 368 * open() is decisive and its third argument is ignored, and the second 369 * open() and the fchmod() are never called. 370 */ 371 fd = qga_open_cloexec(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0); 372 if (fd == -1 && errno == EEXIST) { 373 oflag &= ~(unsigned)O_CREAT; 374 fd = qga_open_cloexec(path, oflag, 0); 375 } 376 if (fd == -1) { 377 error_setg_errno(errp, errno, 378 "failed to open file '%s' (mode: '%s')", 379 path, mode); 380 goto end; 381 } 382 383 if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) { 384 error_setg_errno(errp, errno, "failed to set permission " 385 "0%03o on new file '%s' (mode: '%s')", 386 (unsigned)DEFAULT_NEW_FILE_MODE, path, mode); 387 goto end; 388 } 389 390 f = fdopen(fd, mode); 391 if (f == NULL) { 392 error_setg_errno(errp, errno, "failed to associate stdio stream with " 393 "file descriptor %d, file '%s' (mode: '%s')", 394 fd, path, mode); 395 } 396 397 end: 398 if (f == NULL && fd != -1) { 399 close(fd); 400 if (oflag & O_CREAT) { 401 unlink(path); 402 } 403 } 404 return f; 405 } 406 407 int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, 408 Error **errp) 409 { 410 FILE *fh; 411 Error *local_err = NULL; 412 int64_t handle; 413 414 if (!has_mode) { 415 mode = "r"; 416 } 417 slog("guest-file-open called, filepath: %s, mode: %s", path, mode); 418 fh = safe_open_or_create(path, mode, &local_err); 419 if (local_err != NULL) { 420 error_propagate(errp, local_err); 421 return -1; 422 } 423 424 /* set fd non-blocking to avoid common use cases (like reading from a 425 * named pipe) from hanging the agent 426 */ 427 if (!g_unix_set_fd_nonblocking(fileno(fh), true, NULL)) { 428 fclose(fh); 429 error_setg_errno(errp, errno, "Failed to set FD nonblocking"); 430 return -1; 431 } 432 433 handle = guest_file_handle_add(fh, errp); 434 if (handle < 0) { 435 fclose(fh); 436 return -1; 437 } 438 439 slog("guest-file-open, handle: %" PRId64, handle); 440 return handle; 441 } 442 443 void qmp_guest_file_close(int64_t handle, Error **errp) 444 { 445 GuestFileHandle *gfh = guest_file_handle_find(handle, errp); 446 int ret; 447 448 slog("guest-file-close called, handle: %" PRId64, handle); 449 if (!gfh) { 450 return; 451 } 452 453 ret = fclose(gfh->fh); 454 if (ret == EOF) { 455 error_setg_errno(errp, errno, "failed to close handle"); 456 return; 457 } 458 459 QTAILQ_REMOVE(&guest_file_state.filehandles, gfh, next); 460 g_free(gfh); 461 } 462 463 GuestFileRead *guest_file_read_unsafe(GuestFileHandle *gfh, 464 int64_t count, Error **errp) 465 { 466 GuestFileRead *read_data = NULL; 467 guchar *buf; 468 FILE *fh = gfh->fh; 469 size_t read_count; 470 471 /* explicitly flush when switching from writing to reading */ 472 if (gfh->state == RW_STATE_WRITING) { 473 int ret = fflush(fh); 474 if (ret == EOF) { 475 error_setg_errno(errp, errno, "failed to flush file"); 476 return NULL; 477 } 478 gfh->state = RW_STATE_NEW; 479 } 480 481 buf = g_malloc0(count + 1); 482 read_count = fread(buf, 1, count, fh); 483 if (ferror(fh)) { 484 error_setg_errno(errp, errno, "failed to read file"); 485 } else { 486 buf[read_count] = 0; 487 read_data = g_new0(GuestFileRead, 1); 488 read_data->count = read_count; 489 read_data->eof = feof(fh); 490 if (read_count) { 491 read_data->buf_b64 = g_base64_encode(buf, read_count); 492 } 493 gfh->state = RW_STATE_READING; 494 } 495 g_free(buf); 496 clearerr(fh); 497 498 return read_data; 499 } 500 501 GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64, 502 bool has_count, int64_t count, 503 Error **errp) 504 { 505 GuestFileWrite *write_data = NULL; 506 guchar *buf; 507 gsize buf_len; 508 int write_count; 509 GuestFileHandle *gfh = guest_file_handle_find(handle, errp); 510 FILE *fh; 511 512 if (!gfh) { 513 return NULL; 514 } 515 516 fh = gfh->fh; 517 518 if (gfh->state == RW_STATE_READING) { 519 int ret = fseek(fh, 0, SEEK_CUR); 520 if (ret == -1) { 521 error_setg_errno(errp, errno, "failed to seek file"); 522 return NULL; 523 } 524 gfh->state = RW_STATE_NEW; 525 } 526 527 buf = qbase64_decode(buf_b64, -1, &buf_len, errp); 528 if (!buf) { 529 return NULL; 530 } 531 532 if (!has_count) { 533 count = buf_len; 534 } else if (count < 0 || count > buf_len) { 535 error_setg(errp, "value '%" PRId64 "' is invalid for argument count", 536 count); 537 g_free(buf); 538 return NULL; 539 } 540 541 write_count = fwrite(buf, 1, count, fh); 542 if (ferror(fh)) { 543 error_setg_errno(errp, errno, "failed to write to file"); 544 slog("guest-file-write failed, handle: %" PRId64, handle); 545 } else { 546 write_data = g_new0(GuestFileWrite, 1); 547 write_data->count = write_count; 548 write_data->eof = feof(fh); 549 gfh->state = RW_STATE_WRITING; 550 } 551 g_free(buf); 552 clearerr(fh); 553 554 return write_data; 555 } 556 557 struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset, 558 GuestFileWhence *whence_code, 559 Error **errp) 560 { 561 GuestFileHandle *gfh = guest_file_handle_find(handle, errp); 562 GuestFileSeek *seek_data = NULL; 563 FILE *fh; 564 int ret; 565 int whence; 566 Error *err = NULL; 567 568 if (!gfh) { 569 return NULL; 570 } 571 572 /* We stupidly exposed 'whence':'int' in our qapi */ 573 whence = ga_parse_whence(whence_code, &err); 574 if (err) { 575 error_propagate(errp, err); 576 return NULL; 577 } 578 579 fh = gfh->fh; 580 ret = fseek(fh, offset, whence); 581 if (ret == -1) { 582 error_setg_errno(errp, errno, "failed to seek file"); 583 if (errno == ESPIPE) { 584 /* file is non-seekable, stdio shouldn't be buffering anyways */ 585 gfh->state = RW_STATE_NEW; 586 } 587 } else { 588 seek_data = g_new0(GuestFileSeek, 1); 589 seek_data->position = ftell(fh); 590 seek_data->eof = feof(fh); 591 gfh->state = RW_STATE_NEW; 592 } 593 clearerr(fh); 594 595 return seek_data; 596 } 597 598 void qmp_guest_file_flush(int64_t handle, Error **errp) 599 { 600 GuestFileHandle *gfh = guest_file_handle_find(handle, errp); 601 FILE *fh; 602 int ret; 603 604 if (!gfh) { 605 return; 606 } 607 608 fh = gfh->fh; 609 ret = fflush(fh); 610 if (ret == EOF) { 611 error_setg_errno(errp, errno, "failed to flush file"); 612 } else { 613 gfh->state = RW_STATE_NEW; 614 } 615 } 616 617 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) 618 void free_fs_mount_list(FsMountList *mounts) 619 { 620 FsMount *mount, *temp; 621 622 if (!mounts) { 623 return; 624 } 625 626 QTAILQ_FOREACH_SAFE(mount, mounts, next, temp) { 627 QTAILQ_REMOVE(mounts, mount, next); 628 g_free(mount->dirname); 629 g_free(mount->devtype); 630 g_free(mount); 631 } 632 } 633 #endif 634 635 #if defined(CONFIG_FSFREEZE) 636 typedef enum { 637 FSFREEZE_HOOK_THAW = 0, 638 FSFREEZE_HOOK_FREEZE, 639 } FsfreezeHookArg; 640 641 static const char *fsfreeze_hook_arg_string[] = { 642 "thaw", 643 "freeze", 644 }; 645 646 static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp) 647 { 648 int status; 649 pid_t pid; 650 const char *hook; 651 const char *arg_str = fsfreeze_hook_arg_string[arg]; 652 Error *local_err = NULL; 653 654 hook = ga_fsfreeze_hook(ga_state); 655 if (!hook) { 656 return; 657 } 658 if (access(hook, X_OK) != 0) { 659 error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook); 660 return; 661 } 662 663 slog("executing fsfreeze hook with arg '%s'", arg_str); 664 pid = fork(); 665 if (pid == 0) { 666 setsid(); 667 reopen_fd_to_null(0); 668 reopen_fd_to_null(1); 669 reopen_fd_to_null(2); 670 671 execl(hook, hook, arg_str, NULL); 672 _exit(EXIT_FAILURE); 673 } else if (pid < 0) { 674 error_setg_errno(errp, errno, "failed to create child process"); 675 return; 676 } 677 678 ga_wait_child(pid, &status, &local_err); 679 if (local_err) { 680 error_propagate(errp, local_err); 681 return; 682 } 683 684 if (!WIFEXITED(status)) { 685 error_setg(errp, "fsfreeze hook has terminated abnormally"); 686 return; 687 } 688 689 status = WEXITSTATUS(status); 690 if (status) { 691 error_setg(errp, "fsfreeze hook has failed with status %d", status); 692 return; 693 } 694 } 695 696 /* 697 * Return status of freeze/thaw 698 */ 699 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) 700 { 701 if (ga_is_frozen(ga_state)) { 702 return GUEST_FSFREEZE_STATUS_FROZEN; 703 } 704 705 return GUEST_FSFREEZE_STATUS_THAWED; 706 } 707 708 int64_t qmp_guest_fsfreeze_freeze(Error **errp) 709 { 710 return qmp_guest_fsfreeze_freeze_list(false, NULL, errp); 711 } 712 713 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, 714 strList *mountpoints, 715 Error **errp) 716 { 717 int ret; 718 FsMountList mounts; 719 Error *local_err = NULL; 720 721 slog("guest-fsfreeze called"); 722 723 execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err); 724 if (local_err) { 725 error_propagate(errp, local_err); 726 return -1; 727 } 728 729 QTAILQ_INIT(&mounts); 730 if (!build_fs_mount_list(&mounts, &local_err)) { 731 error_propagate(errp, local_err); 732 return -1; 733 } 734 735 /* cannot risk guest agent blocking itself on a write in this state */ 736 ga_set_frozen(ga_state); 737 738 ret = qmp_guest_fsfreeze_do_freeze_list(has_mountpoints, mountpoints, 739 mounts, errp); 740 741 free_fs_mount_list(&mounts); 742 /* We may not issue any FIFREEZE here. 743 * Just unset ga_state here and ready for the next call. 744 */ 745 if (ret == 0) { 746 ga_unset_frozen(ga_state); 747 } else if (ret < 0) { 748 qmp_guest_fsfreeze_thaw(NULL); 749 } 750 return ret; 751 } 752 753 int64_t qmp_guest_fsfreeze_thaw(Error **errp) 754 { 755 int ret; 756 757 ret = qmp_guest_fsfreeze_do_thaw(errp); 758 if (ret >= 0) { 759 ga_unset_frozen(ga_state); 760 execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp); 761 } else { 762 ret = 0; 763 } 764 765 return ret; 766 } 767 768 static void guest_fsfreeze_cleanup(void) 769 { 770 Error *err = NULL; 771 772 if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) { 773 qmp_guest_fsfreeze_thaw(&err); 774 if (err) { 775 slog("failed to clean up frozen filesystems: %s", 776 error_get_pretty(err)); 777 error_free(err); 778 } 779 } 780 } 781 #endif 782 783 /* linux-specific implementations. avoid this if at all possible. */ 784 #if defined(__linux__) 785 #if defined(CONFIG_FSFREEZE) 786 787 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) 788 { 789 char *path; 790 char *dpath; 791 char *driver = NULL; 792 char buf[PATH_MAX]; 793 ssize_t len; 794 795 path = g_strndup(syspath, pathlen); 796 dpath = g_strdup_printf("%s/driver", path); 797 len = readlink(dpath, buf, sizeof(buf) - 1); 798 if (len != -1) { 799 buf[len] = 0; 800 driver = g_path_get_basename(buf); 801 } 802 g_free(dpath); 803 g_free(path); 804 return driver; 805 } 806 807 static int compare_uint(const void *_a, const void *_b) 808 { 809 unsigned int a = *(unsigned int *)_a; 810 unsigned int b = *(unsigned int *)_b; 811 812 return a < b ? -1 : a > b ? 1 : 0; 813 } 814 815 /* Walk the specified sysfs and build a sorted list of host or ata numbers */ 816 static int build_hosts(char const *syspath, char const *host, bool ata, 817 unsigned int *hosts, int hosts_max, Error **errp) 818 { 819 char *path; 820 DIR *dir; 821 struct dirent *entry; 822 int i = 0; 823 824 path = g_strndup(syspath, host - syspath); 825 dir = opendir(path); 826 if (!dir) { 827 error_setg_errno(errp, errno, "opendir(\"%s\")", path); 828 g_free(path); 829 return -1; 830 } 831 832 while (i < hosts_max) { 833 entry = readdir(dir); 834 if (!entry) { 835 break; 836 } 837 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { 838 ++i; 839 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { 840 ++i; 841 } 842 } 843 844 qsort(hosts, i, sizeof(hosts[0]), compare_uint); 845 846 g_free(path); 847 closedir(dir); 848 return i; 849 } 850 851 /* 852 * Store disk device info for devices on the PCI bus. 853 * Returns true if information has been stored, or false for failure. 854 */ 855 static bool build_guest_fsinfo_for_pci_dev(char const *syspath, 856 GuestDiskAddress *disk, 857 Error **errp) 858 { 859 unsigned int pci[4], host, hosts[8], tgt[3]; 860 int i, nhosts = 0, pcilen; 861 GuestPCIAddress *pciaddr = disk->pci_controller; 862 bool has_ata = false, has_host = false, has_tgt = false; 863 char *p, *q, *driver = NULL; 864 bool ret = false; 865 866 p = strstr(syspath, "/devices/pci"); 867 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", 868 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { 869 g_debug("only pci device is supported: sysfs path '%s'", syspath); 870 return false; 871 } 872 873 p += 12 + pcilen; 874 while (true) { 875 driver = get_pci_driver(syspath, p - syspath, errp); 876 if (driver && (g_str_equal(driver, "ata_piix") || 877 g_str_equal(driver, "sym53c8xx") || 878 g_str_equal(driver, "virtio-pci") || 879 g_str_equal(driver, "ahci") || 880 g_str_equal(driver, "nvme"))) { 881 break; 882 } 883 884 g_free(driver); 885 if (sscanf(p, "/%x:%x:%x.%x%n", 886 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { 887 p += pcilen; 888 continue; 889 } 890 891 g_debug("unsupported driver or sysfs path '%s'", syspath); 892 return false; 893 } 894 895 p = strstr(syspath, "/target"); 896 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", 897 tgt, tgt + 1, tgt + 2) == 3) { 898 has_tgt = true; 899 } 900 901 p = strstr(syspath, "/ata"); 902 if (p) { 903 q = p + 4; 904 has_ata = true; 905 } else { 906 p = strstr(syspath, "/host"); 907 q = p + 5; 908 } 909 if (p && sscanf(q, "%u", &host) == 1) { 910 has_host = true; 911 nhosts = build_hosts(syspath, p, has_ata, hosts, 912 ARRAY_SIZE(hosts), errp); 913 if (nhosts < 0) { 914 goto cleanup; 915 } 916 } 917 918 pciaddr->domain = pci[0]; 919 pciaddr->bus = pci[1]; 920 pciaddr->slot = pci[2]; 921 pciaddr->function = pci[3]; 922 923 if (strcmp(driver, "ata_piix") == 0) { 924 /* a host per ide bus, target*:0:<unit>:0 */ 925 if (!has_host || !has_tgt) { 926 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); 927 goto cleanup; 928 } 929 for (i = 0; i < nhosts; i++) { 930 if (host == hosts[i]) { 931 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; 932 disk->bus = i; 933 disk->unit = tgt[1]; 934 break; 935 } 936 } 937 if (i >= nhosts) { 938 g_debug("no host for '%s' (driver '%s')", syspath, driver); 939 goto cleanup; 940 } 941 } else if (strcmp(driver, "sym53c8xx") == 0) { 942 /* scsi(LSI Logic): target*:0:<unit>:0 */ 943 if (!has_tgt) { 944 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); 945 goto cleanup; 946 } 947 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; 948 disk->unit = tgt[1]; 949 } else if (strcmp(driver, "virtio-pci") == 0) { 950 if (has_tgt) { 951 /* virtio-scsi: target*:0:0:<unit> */ 952 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; 953 disk->unit = tgt[2]; 954 } else { 955 /* virtio-blk: 1 disk per 1 device */ 956 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; 957 } 958 } else if (strcmp(driver, "ahci") == 0) { 959 /* ahci: 1 host per 1 unit */ 960 if (!has_host || !has_tgt) { 961 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); 962 goto cleanup; 963 } 964 for (i = 0; i < nhosts; i++) { 965 if (host == hosts[i]) { 966 disk->unit = i; 967 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; 968 break; 969 } 970 } 971 if (i >= nhosts) { 972 g_debug("no host for '%s' (driver '%s')", syspath, driver); 973 goto cleanup; 974 } 975 } else if (strcmp(driver, "nvme") == 0) { 976 disk->bus_type = GUEST_DISK_BUS_TYPE_NVME; 977 } else { 978 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); 979 goto cleanup; 980 } 981 982 ret = true; 983 984 cleanup: 985 g_free(driver); 986 return ret; 987 } 988 989 /* 990 * Store disk device info for non-PCI virtio devices (for example s390x 991 * channel I/O devices). Returns true if information has been stored, or 992 * false for failure. 993 */ 994 static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, 995 GuestDiskAddress *disk, 996 Error **errp) 997 { 998 unsigned int tgt[3]; 999 char *p; 1000 1001 if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { 1002 g_debug("Unsupported virtio device '%s'", syspath); 1003 return false; 1004 } 1005 1006 p = strstr(syspath, "/target"); 1007 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", 1008 &tgt[0], &tgt[1], &tgt[2]) == 3) { 1009 /* virtio-scsi: target*:0:<target>:<unit> */ 1010 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; 1011 disk->bus = tgt[0]; 1012 disk->target = tgt[1]; 1013 disk->unit = tgt[2]; 1014 } else { 1015 /* virtio-blk: 1 disk per 1 device */ 1016 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; 1017 } 1018 1019 return true; 1020 } 1021 1022 /* 1023 * Store disk device info for CCW devices (s390x channel I/O devices). 1024 * Returns true if information has been stored, or false for failure. 1025 */ 1026 static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, 1027 GuestDiskAddress *disk, 1028 Error **errp) 1029 { 1030 unsigned int cssid, ssid, subchno, devno; 1031 char *p; 1032 1033 p = strstr(syspath, "/devices/css"); 1034 if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", 1035 &cssid, &ssid, &subchno, &devno) < 4) { 1036 g_debug("could not parse ccw device sysfs path: %s", syspath); 1037 return false; 1038 } 1039 1040 disk->has_ccw_address = true; 1041 disk->ccw_address = g_new0(GuestCCWAddress, 1); 1042 disk->ccw_address->cssid = cssid; 1043 disk->ccw_address->ssid = ssid; 1044 disk->ccw_address->subchno = subchno; 1045 disk->ccw_address->devno = devno; 1046 1047 if (strstr(p, "/virtio")) { 1048 build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); 1049 } 1050 1051 return true; 1052 } 1053 1054 /* Store disk device info specified by @sysfs into @fs */ 1055 static void build_guest_fsinfo_for_real_device(char const *syspath, 1056 GuestFilesystemInfo *fs, 1057 Error **errp) 1058 { 1059 GuestDiskAddress *disk; 1060 GuestPCIAddress *pciaddr; 1061 bool has_hwinf; 1062 #ifdef CONFIG_LIBUDEV 1063 struct udev *udev = NULL; 1064 struct udev_device *udevice = NULL; 1065 #endif 1066 1067 pciaddr = g_new0(GuestPCIAddress, 1); 1068 pciaddr->domain = -1; /* -1 means field is invalid */ 1069 pciaddr->bus = -1; 1070 pciaddr->slot = -1; 1071 pciaddr->function = -1; 1072 1073 disk = g_new0(GuestDiskAddress, 1); 1074 disk->pci_controller = pciaddr; 1075 disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; 1076 1077 #ifdef CONFIG_LIBUDEV 1078 udev = udev_new(); 1079 udevice = udev_device_new_from_syspath(udev, syspath); 1080 if (udev == NULL || udevice == NULL) { 1081 g_debug("failed to query udev"); 1082 } else { 1083 const char *devnode, *serial; 1084 devnode = udev_device_get_devnode(udevice); 1085 if (devnode != NULL) { 1086 disk->dev = g_strdup(devnode); 1087 disk->has_dev = true; 1088 } 1089 serial = udev_device_get_property_value(udevice, "ID_SERIAL"); 1090 if (serial != NULL && *serial != 0) { 1091 disk->serial = g_strdup(serial); 1092 disk->has_serial = true; 1093 } 1094 } 1095 1096 udev_unref(udev); 1097 udev_device_unref(udevice); 1098 #endif 1099 1100 if (strstr(syspath, "/devices/pci")) { 1101 has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); 1102 } else if (strstr(syspath, "/devices/css")) { 1103 has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); 1104 } else if (strstr(syspath, "/virtio")) { 1105 has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); 1106 } else { 1107 g_debug("Unsupported device type for '%s'", syspath); 1108 has_hwinf = false; 1109 } 1110 1111 if (has_hwinf || disk->has_dev || disk->has_serial) { 1112 QAPI_LIST_PREPEND(fs->disk, disk); 1113 } else { 1114 qapi_free_GuestDiskAddress(disk); 1115 } 1116 } 1117 1118 static void build_guest_fsinfo_for_device(char const *devpath, 1119 GuestFilesystemInfo *fs, 1120 Error **errp); 1121 1122 /* Store a list of slave devices of virtual volume specified by @syspath into 1123 * @fs */ 1124 static void build_guest_fsinfo_for_virtual_device(char const *syspath, 1125 GuestFilesystemInfo *fs, 1126 Error **errp) 1127 { 1128 Error *err = NULL; 1129 DIR *dir; 1130 char *dirpath; 1131 struct dirent *entry; 1132 1133 dirpath = g_strdup_printf("%s/slaves", syspath); 1134 dir = opendir(dirpath); 1135 if (!dir) { 1136 if (errno != ENOENT) { 1137 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); 1138 } 1139 g_free(dirpath); 1140 return; 1141 } 1142 1143 for (;;) { 1144 errno = 0; 1145 entry = readdir(dir); 1146 if (entry == NULL) { 1147 if (errno) { 1148 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); 1149 } 1150 break; 1151 } 1152 1153 if (entry->d_type == DT_LNK) { 1154 char *path; 1155 1156 g_debug(" slave device '%s'", entry->d_name); 1157 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); 1158 build_guest_fsinfo_for_device(path, fs, &err); 1159 g_free(path); 1160 1161 if (err) { 1162 error_propagate(errp, err); 1163 break; 1164 } 1165 } 1166 } 1167 1168 g_free(dirpath); 1169 closedir(dir); 1170 } 1171 1172 static bool is_disk_virtual(const char *devpath, Error **errp) 1173 { 1174 g_autofree char *syspath = realpath(devpath, NULL); 1175 1176 if (!syspath) { 1177 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); 1178 return false; 1179 } 1180 return strstr(syspath, "/devices/virtual/block/") != NULL; 1181 } 1182 1183 /* Dispatch to functions for virtual/real device */ 1184 static void build_guest_fsinfo_for_device(char const *devpath, 1185 GuestFilesystemInfo *fs, 1186 Error **errp) 1187 { 1188 ERRP_GUARD(); 1189 g_autofree char *syspath = NULL; 1190 bool is_virtual = false; 1191 1192 syspath = realpath(devpath, NULL); 1193 if (!syspath) { 1194 if (errno != ENOENT) { 1195 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); 1196 return; 1197 } 1198 1199 /* ENOENT: This devpath may not exist because of container config */ 1200 if (!fs->name) { 1201 fs->name = g_path_get_basename(devpath); 1202 } 1203 return; 1204 } 1205 1206 if (!fs->name) { 1207 fs->name = g_path_get_basename(syspath); 1208 } 1209 1210 g_debug(" parse sysfs path '%s'", syspath); 1211 is_virtual = is_disk_virtual(syspath, errp); 1212 if (*errp != NULL) { 1213 return; 1214 } 1215 if (is_virtual) { 1216 build_guest_fsinfo_for_virtual_device(syspath, fs, errp); 1217 } else { 1218 build_guest_fsinfo_for_real_device(syspath, fs, errp); 1219 } 1220 } 1221 1222 #ifdef CONFIG_LIBUDEV 1223 1224 /* 1225 * Wrapper around build_guest_fsinfo_for_device() for getting just 1226 * the disk address. 1227 */ 1228 static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) 1229 { 1230 g_autoptr(GuestFilesystemInfo) fs = NULL; 1231 1232 fs = g_new0(GuestFilesystemInfo, 1); 1233 build_guest_fsinfo_for_device(syspath, fs, errp); 1234 if (fs->disk != NULL) { 1235 return g_steal_pointer(&fs->disk->value); 1236 } 1237 return NULL; 1238 } 1239 1240 static char *get_alias_for_syspath(const char *syspath) 1241 { 1242 struct udev *udev = NULL; 1243 struct udev_device *udevice = NULL; 1244 char *ret = NULL; 1245 1246 udev = udev_new(); 1247 if (udev == NULL) { 1248 g_debug("failed to query udev"); 1249 goto out; 1250 } 1251 udevice = udev_device_new_from_syspath(udev, syspath); 1252 if (udevice == NULL) { 1253 g_debug("failed to query udev for path: %s", syspath); 1254 goto out; 1255 } else { 1256 const char *alias = udev_device_get_property_value( 1257 udevice, "DM_NAME"); 1258 /* 1259 * NULL means there was an error and empty string means there is no 1260 * alias. In case of no alias we return NULL instead of empty string. 1261 */ 1262 if (alias == NULL) { 1263 g_debug("failed to query udev for device alias for: %s", 1264 syspath); 1265 } else if (*alias != 0) { 1266 ret = g_strdup(alias); 1267 } 1268 } 1269 1270 out: 1271 udev_unref(udev); 1272 udev_device_unref(udevice); 1273 return ret; 1274 } 1275 1276 static char *get_device_for_syspath(const char *syspath) 1277 { 1278 struct udev *udev = NULL; 1279 struct udev_device *udevice = NULL; 1280 char *ret = NULL; 1281 1282 udev = udev_new(); 1283 if (udev == NULL) { 1284 g_debug("failed to query udev"); 1285 goto out; 1286 } 1287 udevice = udev_device_new_from_syspath(udev, syspath); 1288 if (udevice == NULL) { 1289 g_debug("failed to query udev for path: %s", syspath); 1290 goto out; 1291 } else { 1292 ret = g_strdup(udev_device_get_devnode(udevice)); 1293 } 1294 1295 out: 1296 udev_unref(udev); 1297 udev_device_unref(udevice); 1298 return ret; 1299 } 1300 1301 static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) 1302 { 1303 g_autofree char *deps_dir = NULL; 1304 const gchar *dep; 1305 GDir *dp_deps = NULL; 1306 1307 /* List dependent disks */ 1308 deps_dir = g_strdup_printf("%s/slaves", disk_dir); 1309 g_debug(" listing entries in: %s", deps_dir); 1310 dp_deps = g_dir_open(deps_dir, 0, NULL); 1311 if (dp_deps == NULL) { 1312 g_debug("failed to list entries in %s", deps_dir); 1313 return; 1314 } 1315 disk->has_dependencies = true; 1316 while ((dep = g_dir_read_name(dp_deps)) != NULL) { 1317 g_autofree char *dep_dir = NULL; 1318 char *dev_name; 1319 1320 /* Add dependent disks */ 1321 dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); 1322 dev_name = get_device_for_syspath(dep_dir); 1323 if (dev_name != NULL) { 1324 g_debug(" adding dependent device: %s", dev_name); 1325 QAPI_LIST_PREPEND(disk->dependencies, dev_name); 1326 } 1327 } 1328 g_dir_close(dp_deps); 1329 } 1330 1331 /* 1332 * Detect partitions subdirectory, name is "<disk_name><number>" or 1333 * "<disk_name>p<number>" 1334 * 1335 * @disk_name -- last component of /sys path (e.g. sda) 1336 * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) 1337 * @disk_dev -- device node of the disk (e.g. /dev/sda) 1338 */ 1339 static GuestDiskInfoList *get_disk_partitions( 1340 GuestDiskInfoList *list, 1341 const char *disk_name, const char *disk_dir, 1342 const char *disk_dev) 1343 { 1344 GuestDiskInfoList *ret = list; 1345 struct dirent *de_disk; 1346 DIR *dp_disk = NULL; 1347 size_t len = strlen(disk_name); 1348 1349 dp_disk = opendir(disk_dir); 1350 while ((de_disk = readdir(dp_disk)) != NULL) { 1351 g_autofree char *partition_dir = NULL; 1352 char *dev_name; 1353 GuestDiskInfo *partition; 1354 1355 if (!(de_disk->d_type & DT_DIR)) { 1356 continue; 1357 } 1358 1359 if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && 1360 ((*(de_disk->d_name + len) == 'p' && 1361 isdigit(*(de_disk->d_name + len + 1))) || 1362 isdigit(*(de_disk->d_name + len))))) { 1363 continue; 1364 } 1365 1366 partition_dir = g_strdup_printf("%s/%s", 1367 disk_dir, de_disk->d_name); 1368 dev_name = get_device_for_syspath(partition_dir); 1369 if (dev_name == NULL) { 1370 g_debug("Failed to get device name for syspath: %s", 1371 disk_dir); 1372 continue; 1373 } 1374 partition = g_new0(GuestDiskInfo, 1); 1375 partition->name = dev_name; 1376 partition->partition = true; 1377 partition->has_dependencies = true; 1378 /* Add parent disk as dependent for easier tracking of hierarchy */ 1379 QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); 1380 1381 QAPI_LIST_PREPEND(ret, partition); 1382 } 1383 closedir(dp_disk); 1384 1385 return ret; 1386 } 1387 1388 static void get_nvme_smart(GuestDiskInfo *disk) 1389 { 1390 int fd; 1391 GuestNVMeSmart *smart; 1392 NvmeSmartLog log = {0}; 1393 struct nvme_admin_cmd cmd = { 1394 .opcode = NVME_ADM_CMD_GET_LOG_PAGE, 1395 .nsid = NVME_NSID_BROADCAST, 1396 .addr = (uintptr_t)&log, 1397 .data_len = sizeof(log), 1398 .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */ 1399 | (((sizeof(log) >> 2) - 1) << 16) 1400 }; 1401 1402 fd = qga_open_cloexec(disk->name, O_RDONLY, 0); 1403 if (fd == -1) { 1404 g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno)); 1405 return; 1406 } 1407 1408 if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) { 1409 g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno)); 1410 close(fd); 1411 return; 1412 } 1413 1414 disk->has_smart = true; 1415 disk->smart = g_new0(GuestDiskSmart, 1); 1416 disk->smart->type = GUEST_DISK_BUS_TYPE_NVME; 1417 1418 smart = &disk->smart->u.nvme; 1419 smart->critical_warning = log.critical_warning; 1420 smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */ 1421 smart->available_spare = log.available_spare; 1422 smart->available_spare_threshold = log.available_spare_threshold; 1423 smart->percentage_used = log.percentage_used; 1424 smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]); 1425 smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]); 1426 smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]); 1427 smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]); 1428 smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]); 1429 smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]); 1430 smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]); 1431 smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]); 1432 smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]); 1433 smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]); 1434 smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]); 1435 smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]); 1436 smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]); 1437 smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]); 1438 smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]); 1439 smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]); 1440 smart->media_errors_lo = le64_to_cpu(log.media_errors[0]); 1441 smart->media_errors_hi = le64_to_cpu(log.media_errors[1]); 1442 smart->number_of_error_log_entries_lo = 1443 le64_to_cpu(log.number_of_error_log_entries[0]); 1444 smart->number_of_error_log_entries_hi = 1445 le64_to_cpu(log.number_of_error_log_entries[1]); 1446 1447 close(fd); 1448 } 1449 1450 static void get_disk_smart(GuestDiskInfo *disk) 1451 { 1452 if (disk->has_address 1453 && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) { 1454 get_nvme_smart(disk); 1455 } 1456 } 1457 1458 GuestDiskInfoList *qmp_guest_get_disks(Error **errp) 1459 { 1460 GuestDiskInfoList *ret = NULL; 1461 GuestDiskInfo *disk; 1462 DIR *dp = NULL; 1463 struct dirent *de = NULL; 1464 1465 g_debug("listing /sys/block directory"); 1466 dp = opendir("/sys/block"); 1467 if (dp == NULL) { 1468 error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); 1469 return NULL; 1470 } 1471 while ((de = readdir(dp)) != NULL) { 1472 g_autofree char *disk_dir = NULL, *line = NULL, 1473 *size_path = NULL; 1474 char *dev_name; 1475 Error *local_err = NULL; 1476 if (de->d_type != DT_LNK) { 1477 g_debug(" skipping entry: %s", de->d_name); 1478 continue; 1479 } 1480 1481 /* Check size and skip zero-sized disks */ 1482 g_debug(" checking disk size"); 1483 size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); 1484 if (!g_file_get_contents(size_path, &line, NULL, NULL)) { 1485 g_debug(" failed to read disk size"); 1486 continue; 1487 } 1488 if (g_strcmp0(line, "0\n") == 0) { 1489 g_debug(" skipping zero-sized disk"); 1490 continue; 1491 } 1492 1493 g_debug(" adding %s", de->d_name); 1494 disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); 1495 dev_name = get_device_for_syspath(disk_dir); 1496 if (dev_name == NULL) { 1497 g_debug("Failed to get device name for syspath: %s", 1498 disk_dir); 1499 continue; 1500 } 1501 disk = g_new0(GuestDiskInfo, 1); 1502 disk->name = dev_name; 1503 disk->partition = false; 1504 disk->alias = get_alias_for_syspath(disk_dir); 1505 disk->has_alias = (disk->alias != NULL); 1506 QAPI_LIST_PREPEND(ret, disk); 1507 1508 /* Get address for non-virtual devices */ 1509 bool is_virtual = is_disk_virtual(disk_dir, &local_err); 1510 if (local_err != NULL) { 1511 g_debug(" failed to check disk path, ignoring error: %s", 1512 error_get_pretty(local_err)); 1513 error_free(local_err); 1514 local_err = NULL; 1515 /* Don't try to get the address */ 1516 is_virtual = true; 1517 } 1518 if (!is_virtual) { 1519 disk->address = get_disk_address(disk_dir, &local_err); 1520 if (local_err != NULL) { 1521 g_debug(" failed to get device info, ignoring error: %s", 1522 error_get_pretty(local_err)); 1523 error_free(local_err); 1524 local_err = NULL; 1525 } else if (disk->address != NULL) { 1526 disk->has_address = true; 1527 } 1528 } 1529 1530 get_disk_deps(disk_dir, disk); 1531 get_disk_smart(disk); 1532 ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); 1533 } 1534 1535 closedir(dp); 1536 1537 return ret; 1538 } 1539 1540 #else 1541 1542 GuestDiskInfoList *qmp_guest_get_disks(Error **errp) 1543 { 1544 error_setg(errp, QERR_UNSUPPORTED); 1545 return NULL; 1546 } 1547 1548 #endif 1549 1550 /* Return a list of the disk device(s)' info which @mount lies on */ 1551 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, 1552 Error **errp) 1553 { 1554 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); 1555 struct statvfs buf; 1556 unsigned long used, nonroot_total, fr_size; 1557 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", 1558 mount->devmajor, mount->devminor); 1559 1560 fs->mountpoint = g_strdup(mount->dirname); 1561 fs->type = g_strdup(mount->devtype); 1562 build_guest_fsinfo_for_device(devpath, fs, errp); 1563 1564 if (statvfs(fs->mountpoint, &buf) == 0) { 1565 fr_size = buf.f_frsize; 1566 used = buf.f_blocks - buf.f_bfree; 1567 nonroot_total = used + buf.f_bavail; 1568 fs->used_bytes = used * fr_size; 1569 fs->total_bytes = nonroot_total * fr_size; 1570 1571 fs->has_total_bytes = true; 1572 fs->has_used_bytes = true; 1573 } 1574 1575 g_free(devpath); 1576 1577 return fs; 1578 } 1579 1580 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) 1581 { 1582 FsMountList mounts; 1583 struct FsMount *mount; 1584 GuestFilesystemInfoList *ret = NULL; 1585 Error *local_err = NULL; 1586 1587 QTAILQ_INIT(&mounts); 1588 if (!build_fs_mount_list(&mounts, &local_err)) { 1589 error_propagate(errp, local_err); 1590 return NULL; 1591 } 1592 1593 QTAILQ_FOREACH(mount, &mounts, next) { 1594 g_debug("Building guest fsinfo for '%s'", mount->dirname); 1595 1596 QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); 1597 if (local_err) { 1598 error_propagate(errp, local_err); 1599 qapi_free_GuestFilesystemInfoList(ret); 1600 ret = NULL; 1601 break; 1602 } 1603 } 1604 1605 free_fs_mount_list(&mounts); 1606 return ret; 1607 } 1608 #endif /* CONFIG_FSFREEZE */ 1609 1610 #if defined(CONFIG_FSTRIM) 1611 /* 1612 * Walk list of mounted file systems in the guest, and trim them. 1613 */ 1614 GuestFilesystemTrimResponse * 1615 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) 1616 { 1617 GuestFilesystemTrimResponse *response; 1618 GuestFilesystemTrimResult *result; 1619 int ret = 0; 1620 FsMountList mounts; 1621 struct FsMount *mount; 1622 int fd; 1623 struct fstrim_range r; 1624 1625 slog("guest-fstrim called"); 1626 1627 QTAILQ_INIT(&mounts); 1628 if (!build_fs_mount_list(&mounts, errp)) { 1629 return NULL; 1630 } 1631 1632 response = g_malloc0(sizeof(*response)); 1633 1634 QTAILQ_FOREACH(mount, &mounts, next) { 1635 result = g_malloc0(sizeof(*result)); 1636 result->path = g_strdup(mount->dirname); 1637 1638 QAPI_LIST_PREPEND(response->paths, result); 1639 1640 fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); 1641 if (fd == -1) { 1642 result->error = g_strdup_printf("failed to open: %s", 1643 strerror(errno)); 1644 result->has_error = true; 1645 continue; 1646 } 1647 1648 /* We try to cull filesystems we know won't work in advance, but other 1649 * filesystems may not implement fstrim for less obvious reasons. 1650 * These will report EOPNOTSUPP; while in some other cases ENOTTY 1651 * will be reported (e.g. CD-ROMs). 1652 * Any other error means an unexpected error. 1653 */ 1654 r.start = 0; 1655 r.len = -1; 1656 r.minlen = has_minimum ? minimum : 0; 1657 ret = ioctl(fd, FITRIM, &r); 1658 if (ret == -1) { 1659 result->has_error = true; 1660 if (errno == ENOTTY || errno == EOPNOTSUPP) { 1661 result->error = g_strdup("trim not supported"); 1662 } else { 1663 result->error = g_strdup_printf("failed to trim: %s", 1664 strerror(errno)); 1665 } 1666 close(fd); 1667 continue; 1668 } 1669 1670 result->has_minimum = true; 1671 result->minimum = r.minlen; 1672 result->has_trimmed = true; 1673 result->trimmed = r.len; 1674 close(fd); 1675 } 1676 1677 free_fs_mount_list(&mounts); 1678 return response; 1679 } 1680 #endif /* CONFIG_FSTRIM */ 1681 1682 1683 #define LINUX_SYS_STATE_FILE "/sys/power/state" 1684 #define SUSPEND_SUPPORTED 0 1685 #define SUSPEND_NOT_SUPPORTED 1 1686 1687 typedef enum { 1688 SUSPEND_MODE_DISK = 0, 1689 SUSPEND_MODE_RAM = 1, 1690 SUSPEND_MODE_HYBRID = 2, 1691 } SuspendMode; 1692 1693 /* 1694 * Executes a command in a child process using g_spawn_sync, 1695 * returning an int >= 0 representing the exit status of the 1696 * process. 1697 * 1698 * If the program wasn't found in path, returns -1. 1699 * 1700 * If a problem happened when creating the child process, 1701 * returns -1 and errp is set. 1702 */ 1703 static int run_process_child(const char *command[], Error **errp) 1704 { 1705 int exit_status, spawn_flag; 1706 GError *g_err = NULL; 1707 bool success; 1708 1709 spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | 1710 G_SPAWN_STDERR_TO_DEV_NULL; 1711 1712 success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag, 1713 NULL, NULL, NULL, NULL, 1714 &exit_status, &g_err); 1715 1716 if (success) { 1717 return WEXITSTATUS(exit_status); 1718 } 1719 1720 if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { 1721 error_setg(errp, "failed to create child process, error '%s'", 1722 g_err->message); 1723 } 1724 1725 g_error_free(g_err); 1726 return -1; 1727 } 1728 1729 static bool systemd_supports_mode(SuspendMode mode, Error **errp) 1730 { 1731 const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", 1732 "systemd-hybrid-sleep"}; 1733 const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; 1734 int status; 1735 1736 status = run_process_child(cmd, errp); 1737 1738 /* 1739 * systemctl status uses LSB return codes so we can expect 1740 * status > 0 and be ok. To assert if the guest has support 1741 * for the selected suspend mode, status should be < 4. 4 is 1742 * the code for unknown service status, the return value when 1743 * the service does not exist. A common value is status = 3 1744 * (program is not running). 1745 */ 1746 if (status > 0 && status < 4) { 1747 return true; 1748 } 1749 1750 return false; 1751 } 1752 1753 static void systemd_suspend(SuspendMode mode, Error **errp) 1754 { 1755 Error *local_err = NULL; 1756 const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; 1757 const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; 1758 int status; 1759 1760 status = run_process_child(cmd, &local_err); 1761 1762 if (status == 0) { 1763 return; 1764 } 1765 1766 if ((status == -1) && !local_err) { 1767 error_setg(errp, "the helper program 'systemctl %s' was not found", 1768 systemctl_args[mode]); 1769 return; 1770 } 1771 1772 if (local_err) { 1773 error_propagate(errp, local_err); 1774 } else { 1775 error_setg(errp, "the helper program 'systemctl %s' returned an " 1776 "unexpected exit status code (%d)", 1777 systemctl_args[mode], status); 1778 } 1779 } 1780 1781 static bool pmutils_supports_mode(SuspendMode mode, Error **errp) 1782 { 1783 Error *local_err = NULL; 1784 const char *pmutils_args[3] = {"--hibernate", "--suspend", 1785 "--suspend-hybrid"}; 1786 const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; 1787 int status; 1788 1789 status = run_process_child(cmd, &local_err); 1790 1791 if (status == SUSPEND_SUPPORTED) { 1792 return true; 1793 } 1794 1795 if ((status == -1) && !local_err) { 1796 return false; 1797 } 1798 1799 if (local_err) { 1800 error_propagate(errp, local_err); 1801 } else { 1802 error_setg(errp, 1803 "the helper program '%s' returned an unexpected exit" 1804 " status code (%d)", "pm-is-supported", status); 1805 } 1806 1807 return false; 1808 } 1809 1810 static void pmutils_suspend(SuspendMode mode, Error **errp) 1811 { 1812 Error *local_err = NULL; 1813 const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", 1814 "pm-suspend-hybrid"}; 1815 const char *cmd[2] = {pmutils_binaries[mode], NULL}; 1816 int status; 1817 1818 status = run_process_child(cmd, &local_err); 1819 1820 if (status == 0) { 1821 return; 1822 } 1823 1824 if ((status == -1) && !local_err) { 1825 error_setg(errp, "the helper program '%s' was not found", 1826 pmutils_binaries[mode]); 1827 return; 1828 } 1829 1830 if (local_err) { 1831 error_propagate(errp, local_err); 1832 } else { 1833 error_setg(errp, 1834 "the helper program '%s' returned an unexpected exit" 1835 " status code (%d)", pmutils_binaries[mode], status); 1836 } 1837 } 1838 1839 static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) 1840 { 1841 const char *sysfile_strs[3] = {"disk", "mem", NULL}; 1842 const char *sysfile_str = sysfile_strs[mode]; 1843 char buf[32]; /* hopefully big enough */ 1844 int fd; 1845 ssize_t ret; 1846 1847 if (!sysfile_str) { 1848 error_setg(errp, "unknown guest suspend mode"); 1849 return false; 1850 } 1851 1852 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); 1853 if (fd < 0) { 1854 return false; 1855 } 1856 1857 ret = read(fd, buf, sizeof(buf) - 1); 1858 close(fd); 1859 if (ret <= 0) { 1860 return false; 1861 } 1862 buf[ret] = '\0'; 1863 1864 if (strstr(buf, sysfile_str)) { 1865 return true; 1866 } 1867 return false; 1868 } 1869 1870 static void linux_sys_state_suspend(SuspendMode mode, Error **errp) 1871 { 1872 Error *local_err = NULL; 1873 const char *sysfile_strs[3] = {"disk", "mem", NULL}; 1874 const char *sysfile_str = sysfile_strs[mode]; 1875 pid_t pid; 1876 int status; 1877 1878 if (!sysfile_str) { 1879 error_setg(errp, "unknown guest suspend mode"); 1880 return; 1881 } 1882 1883 pid = fork(); 1884 if (!pid) { 1885 /* child */ 1886 int fd; 1887 1888 setsid(); 1889 reopen_fd_to_null(0); 1890 reopen_fd_to_null(1); 1891 reopen_fd_to_null(2); 1892 1893 fd = open(LINUX_SYS_STATE_FILE, O_WRONLY); 1894 if (fd < 0) { 1895 _exit(EXIT_FAILURE); 1896 } 1897 1898 if (write(fd, sysfile_str, strlen(sysfile_str)) < 0) { 1899 _exit(EXIT_FAILURE); 1900 } 1901 1902 _exit(EXIT_SUCCESS); 1903 } else if (pid < 0) { 1904 error_setg_errno(errp, errno, "failed to create child process"); 1905 return; 1906 } 1907 1908 ga_wait_child(pid, &status, &local_err); 1909 if (local_err) { 1910 error_propagate(errp, local_err); 1911 return; 1912 } 1913 1914 if (WEXITSTATUS(status)) { 1915 error_setg(errp, "child process has failed to suspend"); 1916 } 1917 1918 } 1919 1920 static void guest_suspend(SuspendMode mode, Error **errp) 1921 { 1922 Error *local_err = NULL; 1923 bool mode_supported = false; 1924 1925 if (systemd_supports_mode(mode, &local_err)) { 1926 mode_supported = true; 1927 systemd_suspend(mode, &local_err); 1928 } 1929 1930 if (!local_err) { 1931 return; 1932 } 1933 1934 error_free(local_err); 1935 local_err = NULL; 1936 1937 if (pmutils_supports_mode(mode, &local_err)) { 1938 mode_supported = true; 1939 pmutils_suspend(mode, &local_err); 1940 } 1941 1942 if (!local_err) { 1943 return; 1944 } 1945 1946 error_free(local_err); 1947 local_err = NULL; 1948 1949 if (linux_sys_state_supports_mode(mode, &local_err)) { 1950 mode_supported = true; 1951 linux_sys_state_suspend(mode, &local_err); 1952 } 1953 1954 if (!mode_supported) { 1955 error_free(local_err); 1956 error_setg(errp, 1957 "the requested suspend mode is not supported by the guest"); 1958 } else { 1959 error_propagate(errp, local_err); 1960 } 1961 } 1962 1963 void qmp_guest_suspend_disk(Error **errp) 1964 { 1965 guest_suspend(SUSPEND_MODE_DISK, errp); 1966 } 1967 1968 void qmp_guest_suspend_ram(Error **errp) 1969 { 1970 guest_suspend(SUSPEND_MODE_RAM, errp); 1971 } 1972 1973 void qmp_guest_suspend_hybrid(Error **errp) 1974 { 1975 guest_suspend(SUSPEND_MODE_HYBRID, errp); 1976 } 1977 1978 /* Transfer online/offline status between @vcpu and the guest system. 1979 * 1980 * On input either @errp or *@errp must be NULL. 1981 * 1982 * In system-to-@vcpu direction, the following @vcpu fields are accessed: 1983 * - R: vcpu->logical_id 1984 * - W: vcpu->online 1985 * - W: vcpu->can_offline 1986 * 1987 * In @vcpu-to-system direction, the following @vcpu fields are accessed: 1988 * - R: vcpu->logical_id 1989 * - R: vcpu->online 1990 * 1991 * Written members remain unmodified on error. 1992 */ 1993 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, 1994 char *dirpath, Error **errp) 1995 { 1996 int fd; 1997 int res; 1998 int dirfd; 1999 static const char fn[] = "online"; 2000 2001 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 2002 if (dirfd == -1) { 2003 error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 2004 return; 2005 } 2006 2007 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); 2008 if (fd == -1) { 2009 if (errno != ENOENT) { 2010 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); 2011 } else if (sys2vcpu) { 2012 vcpu->online = true; 2013 vcpu->can_offline = false; 2014 } else if (!vcpu->online) { 2015 error_setg(errp, "logical processor #%" PRId64 " can't be " 2016 "offlined", vcpu->logical_id); 2017 } /* otherwise pretend successful re-onlining */ 2018 } else { 2019 unsigned char status; 2020 2021 res = pread(fd, &status, 1, 0); 2022 if (res == -1) { 2023 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); 2024 } else if (res == 0) { 2025 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, 2026 fn); 2027 } else if (sys2vcpu) { 2028 vcpu->online = (status != '0'); 2029 vcpu->can_offline = true; 2030 } else if (vcpu->online != (status != '0')) { 2031 status = '0' + vcpu->online; 2032 if (pwrite(fd, &status, 1, 0) == -1) { 2033 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, 2034 fn); 2035 } 2036 } /* otherwise pretend successful re-(on|off)-lining */ 2037 2038 res = close(fd); 2039 g_assert(res == 0); 2040 } 2041 2042 res = close(dirfd); 2043 g_assert(res == 0); 2044 } 2045 2046 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 2047 { 2048 GuestLogicalProcessorList *head, **tail; 2049 const char *cpu_dir = "/sys/devices/system/cpu"; 2050 const gchar *line; 2051 g_autoptr(GDir) cpu_gdir = NULL; 2052 Error *local_err = NULL; 2053 2054 head = NULL; 2055 tail = &head; 2056 cpu_gdir = g_dir_open(cpu_dir, 0, NULL); 2057 2058 if (cpu_gdir == NULL) { 2059 error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); 2060 return NULL; 2061 } 2062 2063 while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { 2064 GuestLogicalProcessor *vcpu; 2065 int64_t id; 2066 if (sscanf(line, "cpu%" PRId64, &id)) { 2067 g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" 2068 "cpu%" PRId64 "/", id); 2069 vcpu = g_malloc0(sizeof *vcpu); 2070 vcpu->logical_id = id; 2071 vcpu->has_can_offline = true; /* lolspeak ftw */ 2072 transfer_vcpu(vcpu, true, path, &local_err); 2073 QAPI_LIST_APPEND(tail, vcpu); 2074 } 2075 } 2076 2077 if (local_err == NULL) { 2078 /* there's no guest with zero VCPUs */ 2079 g_assert(head != NULL); 2080 return head; 2081 } 2082 2083 qapi_free_GuestLogicalProcessorList(head); 2084 error_propagate(errp, local_err); 2085 return NULL; 2086 } 2087 2088 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 2089 { 2090 int64_t processed; 2091 Error *local_err = NULL; 2092 2093 processed = 0; 2094 while (vcpus != NULL) { 2095 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", 2096 vcpus->value->logical_id); 2097 2098 transfer_vcpu(vcpus->value, false, path, &local_err); 2099 g_free(path); 2100 if (local_err != NULL) { 2101 break; 2102 } 2103 ++processed; 2104 vcpus = vcpus->next; 2105 } 2106 2107 if (local_err != NULL) { 2108 if (processed == 0) { 2109 error_propagate(errp, local_err); 2110 } else { 2111 error_free(local_err); 2112 } 2113 } 2114 2115 return processed; 2116 } 2117 #endif /* __linux__ */ 2118 2119 #if defined(__linux__) || defined(__FreeBSD__) 2120 void qmp_guest_set_user_password(const char *username, 2121 const char *password, 2122 bool crypted, 2123 Error **errp) 2124 { 2125 Error *local_err = NULL; 2126 char *passwd_path = NULL; 2127 pid_t pid; 2128 int status; 2129 int datafd[2] = { -1, -1 }; 2130 char *rawpasswddata = NULL; 2131 size_t rawpasswdlen; 2132 char *chpasswddata = NULL; 2133 size_t chpasswdlen; 2134 2135 rawpasswddata = (char *)qbase64_decode(password, -1, &rawpasswdlen, errp); 2136 if (!rawpasswddata) { 2137 return; 2138 } 2139 rawpasswddata = g_renew(char, rawpasswddata, rawpasswdlen + 1); 2140 rawpasswddata[rawpasswdlen] = '\0'; 2141 2142 if (strchr(rawpasswddata, '\n')) { 2143 error_setg(errp, "forbidden characters in raw password"); 2144 goto out; 2145 } 2146 2147 if (strchr(username, '\n') || 2148 strchr(username, ':')) { 2149 error_setg(errp, "forbidden characters in username"); 2150 goto out; 2151 } 2152 2153 #ifdef __FreeBSD__ 2154 chpasswddata = g_strdup(rawpasswddata); 2155 passwd_path = g_find_program_in_path("pw"); 2156 #else 2157 chpasswddata = g_strdup_printf("%s:%s\n", username, rawpasswddata); 2158 passwd_path = g_find_program_in_path("chpasswd"); 2159 #endif 2160 2161 chpasswdlen = strlen(chpasswddata); 2162 2163 if (!passwd_path) { 2164 error_setg(errp, "cannot find 'passwd' program in PATH"); 2165 goto out; 2166 } 2167 2168 if (!g_unix_open_pipe(datafd, FD_CLOEXEC, NULL)) { 2169 error_setg(errp, "cannot create pipe FDs"); 2170 goto out; 2171 } 2172 2173 pid = fork(); 2174 if (pid == 0) { 2175 close(datafd[1]); 2176 /* child */ 2177 setsid(); 2178 dup2(datafd[0], 0); 2179 reopen_fd_to_null(1); 2180 reopen_fd_to_null(2); 2181 2182 #ifdef __FreeBSD__ 2183 const char *h_arg; 2184 h_arg = (crypted) ? "-H" : "-h"; 2185 execl(passwd_path, "pw", "usermod", "-n", username, h_arg, "0", NULL); 2186 #else 2187 if (crypted) { 2188 execl(passwd_path, "chpasswd", "-e", NULL); 2189 } else { 2190 execl(passwd_path, "chpasswd", NULL); 2191 } 2192 #endif 2193 _exit(EXIT_FAILURE); 2194 } else if (pid < 0) { 2195 error_setg_errno(errp, errno, "failed to create child process"); 2196 goto out; 2197 } 2198 close(datafd[0]); 2199 datafd[0] = -1; 2200 2201 if (qemu_write_full(datafd[1], chpasswddata, chpasswdlen) != chpasswdlen) { 2202 error_setg_errno(errp, errno, "cannot write new account password"); 2203 goto out; 2204 } 2205 close(datafd[1]); 2206 datafd[1] = -1; 2207 2208 ga_wait_child(pid, &status, &local_err); 2209 if (local_err) { 2210 error_propagate(errp, local_err); 2211 goto out; 2212 } 2213 2214 if (!WIFEXITED(status)) { 2215 error_setg(errp, "child process has terminated abnormally"); 2216 goto out; 2217 } 2218 2219 if (WEXITSTATUS(status)) { 2220 error_setg(errp, "child process has failed to set user password"); 2221 goto out; 2222 } 2223 2224 out: 2225 g_free(chpasswddata); 2226 g_free(rawpasswddata); 2227 g_free(passwd_path); 2228 if (datafd[0] != -1) { 2229 close(datafd[0]); 2230 } 2231 if (datafd[1] != -1) { 2232 close(datafd[1]); 2233 } 2234 } 2235 #else /* __linux__ || __FreeBSD__ */ 2236 void qmp_guest_set_user_password(const char *username, 2237 const char *password, 2238 bool crypted, 2239 Error **errp) 2240 { 2241 error_setg(errp, QERR_UNSUPPORTED); 2242 } 2243 #endif /* __linux__ || __FreeBSD__ */ 2244 2245 #ifdef __linux__ 2246 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, 2247 int size, Error **errp) 2248 { 2249 int fd; 2250 int res; 2251 2252 errno = 0; 2253 fd = openat(dirfd, pathname, O_RDONLY); 2254 if (fd == -1) { 2255 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); 2256 return; 2257 } 2258 2259 res = pread(fd, buf, size, 0); 2260 if (res == -1) { 2261 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); 2262 } else if (res == 0) { 2263 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); 2264 } 2265 close(fd); 2266 } 2267 2268 static void ga_write_sysfs_file(int dirfd, const char *pathname, 2269 const char *buf, int size, Error **errp) 2270 { 2271 int fd; 2272 2273 errno = 0; 2274 fd = openat(dirfd, pathname, O_WRONLY); 2275 if (fd == -1) { 2276 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); 2277 return; 2278 } 2279 2280 if (pwrite(fd, buf, size, 0) == -1) { 2281 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); 2282 } 2283 2284 close(fd); 2285 } 2286 2287 /* Transfer online/offline status between @mem_blk and the guest system. 2288 * 2289 * On input either @errp or *@errp must be NULL. 2290 * 2291 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: 2292 * - R: mem_blk->phys_index 2293 * - W: mem_blk->online 2294 * - W: mem_blk->can_offline 2295 * 2296 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: 2297 * - R: mem_blk->phys_index 2298 * - R: mem_blk->online 2299 *- R: mem_blk->can_offline 2300 * Written members remain unmodified on error. 2301 */ 2302 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, 2303 GuestMemoryBlockResponse *result, 2304 Error **errp) 2305 { 2306 char *dirpath; 2307 int dirfd; 2308 char *status; 2309 Error *local_err = NULL; 2310 2311 if (!sys2memblk) { 2312 DIR *dp; 2313 2314 if (!result) { 2315 error_setg(errp, "Internal error, 'result' should not be NULL"); 2316 return; 2317 } 2318 errno = 0; 2319 dp = opendir("/sys/devices/system/memory/"); 2320 /* if there is no 'memory' directory in sysfs, 2321 * we think this VM does not support online/offline memory block, 2322 * any other solution? 2323 */ 2324 if (!dp) { 2325 if (errno == ENOENT) { 2326 result->response = 2327 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; 2328 } 2329 goto out1; 2330 } 2331 closedir(dp); 2332 } 2333 2334 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", 2335 mem_blk->phys_index); 2336 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 2337 if (dirfd == -1) { 2338 if (sys2memblk) { 2339 error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 2340 } else { 2341 if (errno == ENOENT) { 2342 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; 2343 } else { 2344 result->response = 2345 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; 2346 } 2347 } 2348 g_free(dirpath); 2349 goto out1; 2350 } 2351 g_free(dirpath); 2352 2353 status = g_malloc0(10); 2354 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); 2355 if (local_err) { 2356 /* treat with sysfs file that not exist in old kernel */ 2357 if (errno == ENOENT) { 2358 error_free(local_err); 2359 if (sys2memblk) { 2360 mem_blk->online = true; 2361 mem_blk->can_offline = false; 2362 } else if (!mem_blk->online) { 2363 result->response = 2364 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; 2365 } 2366 } else { 2367 if (sys2memblk) { 2368 error_propagate(errp, local_err); 2369 } else { 2370 error_free(local_err); 2371 result->response = 2372 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; 2373 } 2374 } 2375 goto out2; 2376 } 2377 2378 if (sys2memblk) { 2379 char removable = '0'; 2380 2381 mem_blk->online = (strncmp(status, "online", 6) == 0); 2382 2383 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); 2384 if (local_err) { 2385 /* if no 'removable' file, it doesn't support offline mem blk */ 2386 if (errno == ENOENT) { 2387 error_free(local_err); 2388 mem_blk->can_offline = false; 2389 } else { 2390 error_propagate(errp, local_err); 2391 } 2392 } else { 2393 mem_blk->can_offline = (removable != '0'); 2394 } 2395 } else { 2396 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { 2397 const char *new_state = mem_blk->online ? "online" : "offline"; 2398 2399 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), 2400 &local_err); 2401 if (local_err) { 2402 error_free(local_err); 2403 result->response = 2404 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; 2405 goto out2; 2406 } 2407 2408 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; 2409 result->has_error_code = false; 2410 } /* otherwise pretend successful re-(on|off)-lining */ 2411 } 2412 g_free(status); 2413 close(dirfd); 2414 return; 2415 2416 out2: 2417 g_free(status); 2418 close(dirfd); 2419 out1: 2420 if (!sys2memblk) { 2421 result->has_error_code = true; 2422 result->error_code = errno; 2423 } 2424 } 2425 2426 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) 2427 { 2428 GuestMemoryBlockList *head, **tail; 2429 Error *local_err = NULL; 2430 struct dirent *de; 2431 DIR *dp; 2432 2433 head = NULL; 2434 tail = &head; 2435 2436 dp = opendir("/sys/devices/system/memory/"); 2437 if (!dp) { 2438 /* it's ok if this happens to be a system that doesn't expose 2439 * memory blocks via sysfs, but otherwise we should report 2440 * an error 2441 */ 2442 if (errno != ENOENT) { 2443 error_setg_errno(errp, errno, "Can't open directory" 2444 "\"/sys/devices/system/memory/\""); 2445 } 2446 return NULL; 2447 } 2448 2449 /* Note: the phys_index of memory block may be discontinuous, 2450 * this is because a memblk is the unit of the Sparse Memory design, which 2451 * allows discontinuous memory ranges (ex. NUMA), so here we should 2452 * traverse the memory block directory. 2453 */ 2454 while ((de = readdir(dp)) != NULL) { 2455 GuestMemoryBlock *mem_blk; 2456 2457 if ((strncmp(de->d_name, "memory", 6) != 0) || 2458 !(de->d_type & DT_DIR)) { 2459 continue; 2460 } 2461 2462 mem_blk = g_malloc0(sizeof *mem_blk); 2463 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ 2464 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); 2465 mem_blk->has_can_offline = true; /* lolspeak ftw */ 2466 transfer_memory_block(mem_blk, true, NULL, &local_err); 2467 if (local_err) { 2468 break; 2469 } 2470 2471 QAPI_LIST_APPEND(tail, mem_blk); 2472 } 2473 2474 closedir(dp); 2475 if (local_err == NULL) { 2476 /* there's no guest with zero memory blocks */ 2477 if (head == NULL) { 2478 error_setg(errp, "guest reported zero memory blocks!"); 2479 } 2480 return head; 2481 } 2482 2483 qapi_free_GuestMemoryBlockList(head); 2484 error_propagate(errp, local_err); 2485 return NULL; 2486 } 2487 2488 GuestMemoryBlockResponseList * 2489 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) 2490 { 2491 GuestMemoryBlockResponseList *head, **tail; 2492 Error *local_err = NULL; 2493 2494 head = NULL; 2495 tail = &head; 2496 2497 while (mem_blks != NULL) { 2498 GuestMemoryBlockResponse *result; 2499 GuestMemoryBlock *current_mem_blk = mem_blks->value; 2500 2501 result = g_malloc0(sizeof(*result)); 2502 result->phys_index = current_mem_blk->phys_index; 2503 transfer_memory_block(current_mem_blk, false, result, &local_err); 2504 if (local_err) { /* should never happen */ 2505 goto err; 2506 } 2507 2508 QAPI_LIST_APPEND(tail, result); 2509 mem_blks = mem_blks->next; 2510 } 2511 2512 return head; 2513 err: 2514 qapi_free_GuestMemoryBlockResponseList(head); 2515 error_propagate(errp, local_err); 2516 return NULL; 2517 } 2518 2519 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) 2520 { 2521 Error *local_err = NULL; 2522 char *dirpath; 2523 int dirfd; 2524 char *buf; 2525 GuestMemoryBlockInfo *info; 2526 2527 dirpath = g_strdup_printf("/sys/devices/system/memory/"); 2528 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 2529 if (dirfd == -1) { 2530 error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 2531 g_free(dirpath); 2532 return NULL; 2533 } 2534 g_free(dirpath); 2535 2536 buf = g_malloc0(20); 2537 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); 2538 close(dirfd); 2539 if (local_err) { 2540 g_free(buf); 2541 error_propagate(errp, local_err); 2542 return NULL; 2543 } 2544 2545 info = g_new0(GuestMemoryBlockInfo, 1); 2546 info->size = strtol(buf, NULL, 16); /* the unit is bytes */ 2547 2548 g_free(buf); 2549 2550 return info; 2551 } 2552 2553 #define MAX_NAME_LEN 128 2554 static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) 2555 { 2556 #ifdef CONFIG_LINUX 2557 GuestDiskStatsInfoList *head = NULL, **tail = &head; 2558 const char *diskstats = "/proc/diskstats"; 2559 FILE *fp; 2560 size_t n; 2561 char *line = NULL; 2562 2563 fp = fopen(diskstats, "r"); 2564 if (fp == NULL) { 2565 error_setg_errno(errp, errno, "open(\"%s\")", diskstats); 2566 return NULL; 2567 } 2568 2569 while (getline(&line, &n, fp) != -1) { 2570 g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; 2571 g_autofree GuestDiskStats *diskstat = NULL; 2572 char dev_name[MAX_NAME_LEN]; 2573 unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; 2574 unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; 2575 unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; 2576 unsigned long dc_ios, dc_merges, dc_sec, fl_ios; 2577 unsigned int major, minor; 2578 int i; 2579 2580 i = sscanf(line, "%u %u %s %lu %lu %lu" 2581 "%lu %lu %lu %lu %u %u %u %u" 2582 "%lu %lu %lu %u %lu %u", 2583 &major, &minor, dev_name, 2584 &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, 2585 &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, 2586 &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, 2587 &dc_ios, &dc_merges, &dc_sec, &dc_ticks, 2588 &fl_ios, &fl_ticks); 2589 2590 if (i < 7) { 2591 continue; 2592 } 2593 2594 diskstatinfo = g_new0(GuestDiskStatsInfo, 1); 2595 diskstatinfo->name = g_strdup(dev_name); 2596 diskstatinfo->major = major; 2597 diskstatinfo->minor = minor; 2598 2599 diskstat = g_new0(GuestDiskStats, 1); 2600 if (i == 7) { 2601 diskstat->has_read_ios = true; 2602 diskstat->read_ios = rd_ios; 2603 diskstat->has_read_sectors = true; 2604 diskstat->read_sectors = rd_merges_or_rd_sec; 2605 diskstat->has_write_ios = true; 2606 diskstat->write_ios = rd_sec_or_wr_ios; 2607 diskstat->has_write_sectors = true; 2608 diskstat->write_sectors = rd_ticks_or_wr_sec; 2609 } 2610 if (i >= 14) { 2611 diskstat->has_read_ios = true; 2612 diskstat->read_ios = rd_ios; 2613 diskstat->has_read_sectors = true; 2614 diskstat->read_sectors = rd_sec_or_wr_ios; 2615 diskstat->has_read_merges = true; 2616 diskstat->read_merges = rd_merges_or_rd_sec; 2617 diskstat->has_read_ticks = true; 2618 diskstat->read_ticks = rd_ticks_or_wr_sec; 2619 diskstat->has_write_ios = true; 2620 diskstat->write_ios = wr_ios; 2621 diskstat->has_write_sectors = true; 2622 diskstat->write_sectors = wr_sec; 2623 diskstat->has_write_merges = true; 2624 diskstat->write_merges = wr_merges; 2625 diskstat->has_write_ticks = true; 2626 diskstat->write_ticks = wr_ticks; 2627 diskstat->has_ios_pgr = true; 2628 diskstat->ios_pgr = ios_pgr; 2629 diskstat->has_total_ticks = true; 2630 diskstat->total_ticks = tot_ticks; 2631 diskstat->has_weight_ticks = true; 2632 diskstat->weight_ticks = rq_ticks; 2633 } 2634 if (i >= 18) { 2635 diskstat->has_discard_ios = true; 2636 diskstat->discard_ios = dc_ios; 2637 diskstat->has_discard_merges = true; 2638 diskstat->discard_merges = dc_merges; 2639 diskstat->has_discard_sectors = true; 2640 diskstat->discard_sectors = dc_sec; 2641 diskstat->has_discard_ticks = true; 2642 diskstat->discard_ticks = dc_ticks; 2643 } 2644 if (i >= 20) { 2645 diskstat->has_flush_ios = true; 2646 diskstat->flush_ios = fl_ios; 2647 diskstat->has_flush_ticks = true; 2648 diskstat->flush_ticks = fl_ticks; 2649 } 2650 2651 diskstatinfo->stats = g_steal_pointer(&diskstat); 2652 QAPI_LIST_APPEND(tail, diskstatinfo); 2653 diskstatinfo = NULL; 2654 } 2655 free(line); 2656 fclose(fp); 2657 return head; 2658 #else 2659 g_debug("disk stats reporting available only for Linux"); 2660 return NULL; 2661 #endif 2662 } 2663 2664 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) 2665 { 2666 return guest_get_diskstats(errp); 2667 } 2668 2669 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) 2670 { 2671 GuestCpuStatsList *head = NULL, **tail = &head; 2672 const char *cpustats = "/proc/stat"; 2673 int clk_tck = sysconf(_SC_CLK_TCK); 2674 FILE *fp; 2675 size_t n; 2676 char *line = NULL; 2677 2678 fp = fopen(cpustats, "r"); 2679 if (fp == NULL) { 2680 error_setg_errno(errp, errno, "open(\"%s\")", cpustats); 2681 return NULL; 2682 } 2683 2684 while (getline(&line, &n, fp) != -1) { 2685 GuestCpuStats *cpustat = NULL; 2686 GuestLinuxCpuStats *linuxcpustat; 2687 int i; 2688 unsigned long user, system, idle, iowait, irq, softirq, steal, guest; 2689 unsigned long nice, guest_nice; 2690 char name[64]; 2691 2692 i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", 2693 name, &user, &nice, &system, &idle, &iowait, &irq, &softirq, 2694 &steal, &guest, &guest_nice); 2695 2696 /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */ 2697 if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) { 2698 continue; 2699 } 2700 2701 if (i < 5) { 2702 slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats); 2703 break; 2704 } 2705 2706 cpustat = g_new0(GuestCpuStats, 1); 2707 cpustat->type = GUEST_CPU_STATS_TYPE_LINUX; 2708 2709 linuxcpustat = &cpustat->u.q_linux; 2710 linuxcpustat->cpu = atoi(&name[3]); 2711 linuxcpustat->user = user * 1000 / clk_tck; 2712 linuxcpustat->nice = nice * 1000 / clk_tck; 2713 linuxcpustat->system = system * 1000 / clk_tck; 2714 linuxcpustat->idle = idle * 1000 / clk_tck; 2715 2716 if (i > 5) { 2717 linuxcpustat->has_iowait = true; 2718 linuxcpustat->iowait = iowait * 1000 / clk_tck; 2719 } 2720 2721 if (i > 6) { 2722 linuxcpustat->has_irq = true; 2723 linuxcpustat->irq = irq * 1000 / clk_tck; 2724 linuxcpustat->has_softirq = true; 2725 linuxcpustat->softirq = softirq * 1000 / clk_tck; 2726 } 2727 2728 if (i > 8) { 2729 linuxcpustat->has_steal = true; 2730 linuxcpustat->steal = steal * 1000 / clk_tck; 2731 } 2732 2733 if (i > 9) { 2734 linuxcpustat->has_guest = true; 2735 linuxcpustat->guest = guest * 1000 / clk_tck; 2736 } 2737 2738 if (i > 10) { 2739 linuxcpustat->has_guest = true; 2740 linuxcpustat->guest = guest * 1000 / clk_tck; 2741 linuxcpustat->has_guestnice = true; 2742 linuxcpustat->guestnice = guest_nice * 1000 / clk_tck; 2743 } 2744 2745 QAPI_LIST_APPEND(tail, cpustat); 2746 } 2747 2748 free(line); 2749 fclose(fp); 2750 return head; 2751 } 2752 2753 #else /* defined(__linux__) */ 2754 2755 void qmp_guest_suspend_disk(Error **errp) 2756 { 2757 error_setg(errp, QERR_UNSUPPORTED); 2758 } 2759 2760 void qmp_guest_suspend_ram(Error **errp) 2761 { 2762 error_setg(errp, QERR_UNSUPPORTED); 2763 } 2764 2765 void qmp_guest_suspend_hybrid(Error **errp) 2766 { 2767 error_setg(errp, QERR_UNSUPPORTED); 2768 } 2769 2770 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 2771 { 2772 error_setg(errp, QERR_UNSUPPORTED); 2773 return NULL; 2774 } 2775 2776 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 2777 { 2778 error_setg(errp, QERR_UNSUPPORTED); 2779 return -1; 2780 } 2781 2782 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) 2783 { 2784 error_setg(errp, QERR_UNSUPPORTED); 2785 return NULL; 2786 } 2787 2788 GuestMemoryBlockResponseList * 2789 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) 2790 { 2791 error_setg(errp, QERR_UNSUPPORTED); 2792 return NULL; 2793 } 2794 2795 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) 2796 { 2797 error_setg(errp, QERR_UNSUPPORTED); 2798 return NULL; 2799 } 2800 2801 #endif 2802 2803 #ifdef HAVE_GETIFADDRS 2804 static GuestNetworkInterface * 2805 guest_find_interface(GuestNetworkInterfaceList *head, 2806 const char *name) 2807 { 2808 for (; head; head = head->next) { 2809 if (strcmp(head->value->name, name) == 0) { 2810 return head->value; 2811 } 2812 } 2813 2814 return NULL; 2815 } 2816 2817 static int guest_get_network_stats(const char *name, 2818 GuestNetworkInterfaceStat *stats) 2819 { 2820 #ifdef CONFIG_LINUX 2821 int name_len; 2822 char const *devinfo = "/proc/net/dev"; 2823 FILE *fp; 2824 char *line = NULL, *colon; 2825 size_t n = 0; 2826 fp = fopen(devinfo, "r"); 2827 if (!fp) { 2828 g_debug("failed to open network stats %s: %s", devinfo, 2829 g_strerror(errno)); 2830 return -1; 2831 } 2832 name_len = strlen(name); 2833 while (getline(&line, &n, fp) != -1) { 2834 long long dummy; 2835 long long rx_bytes; 2836 long long rx_packets; 2837 long long rx_errs; 2838 long long rx_dropped; 2839 long long tx_bytes; 2840 long long tx_packets; 2841 long long tx_errs; 2842 long long tx_dropped; 2843 char *trim_line; 2844 trim_line = g_strchug(line); 2845 if (trim_line[0] == '\0') { 2846 continue; 2847 } 2848 colon = strchr(trim_line, ':'); 2849 if (!colon) { 2850 continue; 2851 } 2852 if (colon - name_len == trim_line && 2853 strncmp(trim_line, name, name_len) == 0) { 2854 if (sscanf(colon + 1, 2855 "%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld", 2856 &rx_bytes, &rx_packets, &rx_errs, &rx_dropped, 2857 &dummy, &dummy, &dummy, &dummy, 2858 &tx_bytes, &tx_packets, &tx_errs, &tx_dropped, 2859 &dummy, &dummy, &dummy, &dummy) != 16) { 2860 continue; 2861 } 2862 stats->rx_bytes = rx_bytes; 2863 stats->rx_packets = rx_packets; 2864 stats->rx_errs = rx_errs; 2865 stats->rx_dropped = rx_dropped; 2866 stats->tx_bytes = tx_bytes; 2867 stats->tx_packets = tx_packets; 2868 stats->tx_errs = tx_errs; 2869 stats->tx_dropped = tx_dropped; 2870 fclose(fp); 2871 g_free(line); 2872 return 0; 2873 } 2874 } 2875 fclose(fp); 2876 g_free(line); 2877 g_debug("/proc/net/dev: Interface '%s' not found", name); 2878 #else /* !CONFIG_LINUX */ 2879 g_debug("Network stats reporting available only for Linux"); 2880 #endif /* !CONFIG_LINUX */ 2881 return -1; 2882 } 2883 2884 #ifndef __FreeBSD__ 2885 /* 2886 * Fill "buf" with MAC address by ifaddrs. Pointer buf must point to a 2887 * buffer with ETHER_ADDR_LEN length at least. 2888 * 2889 * Returns false in case of an error, otherwise true. "obtained" argument 2890 * is true if a MAC address was obtained successful, otherwise false. 2891 */ 2892 bool guest_get_hw_addr(struct ifaddrs *ifa, unsigned char *buf, 2893 bool *obtained, Error **errp) 2894 { 2895 struct ifreq ifr; 2896 int sock; 2897 2898 *obtained = false; 2899 2900 /* we haven't obtained HW address yet */ 2901 sock = socket(PF_INET, SOCK_STREAM, 0); 2902 if (sock == -1) { 2903 error_setg_errno(errp, errno, "failed to create socket"); 2904 return false; 2905 } 2906 2907 memset(&ifr, 0, sizeof(ifr)); 2908 pstrcpy(ifr.ifr_name, IF_NAMESIZE, ifa->ifa_name); 2909 if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) { 2910 /* 2911 * We can't get the hw addr of this interface, but that's not a 2912 * fatal error. 2913 */ 2914 if (errno == EADDRNOTAVAIL) { 2915 /* The interface doesn't have a hw addr (e.g. loopback). */ 2916 g_debug("failed to get MAC address of %s: %s", 2917 ifa->ifa_name, strerror(errno)); 2918 } else{ 2919 g_warning("failed to get MAC address of %s: %s", 2920 ifa->ifa_name, strerror(errno)); 2921 } 2922 } else { 2923 #ifdef CONFIG_SOLARIS 2924 memcpy(buf, &ifr.ifr_addr.sa_data, ETHER_ADDR_LEN); 2925 #else 2926 memcpy(buf, &ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN); 2927 #endif 2928 *obtained = true; 2929 } 2930 close(sock); 2931 return true; 2932 } 2933 #endif /* __FreeBSD__ */ 2934 2935 /* 2936 * Build information about guest interfaces 2937 */ 2938 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) 2939 { 2940 GuestNetworkInterfaceList *head = NULL, **tail = &head; 2941 struct ifaddrs *ifap, *ifa; 2942 2943 if (getifaddrs(&ifap) < 0) { 2944 error_setg_errno(errp, errno, "getifaddrs failed"); 2945 goto error; 2946 } 2947 2948 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 2949 GuestNetworkInterface *info; 2950 GuestIpAddressList **address_tail; 2951 GuestIpAddress *address_item = NULL; 2952 GuestNetworkInterfaceStat *interface_stat = NULL; 2953 char addr4[INET_ADDRSTRLEN]; 2954 char addr6[INET6_ADDRSTRLEN]; 2955 unsigned char mac_addr[ETHER_ADDR_LEN]; 2956 bool obtained; 2957 void *p; 2958 2959 g_debug("Processing %s interface", ifa->ifa_name); 2960 2961 info = guest_find_interface(head, ifa->ifa_name); 2962 2963 if (!info) { 2964 info = g_malloc0(sizeof(*info)); 2965 info->name = g_strdup(ifa->ifa_name); 2966 2967 QAPI_LIST_APPEND(tail, info); 2968 } 2969 2970 if (!info->has_hardware_address) { 2971 if (!guest_get_hw_addr(ifa, mac_addr, &obtained, errp)) { 2972 goto error; 2973 } 2974 if (obtained) { 2975 info->hardware_address = 2976 g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x", 2977 (int) mac_addr[0], (int) mac_addr[1], 2978 (int) mac_addr[2], (int) mac_addr[3], 2979 (int) mac_addr[4], (int) mac_addr[5]); 2980 info->has_hardware_address = true; 2981 } 2982 } 2983 2984 if (ifa->ifa_addr && 2985 ifa->ifa_addr->sa_family == AF_INET) { 2986 /* interface with IPv4 address */ 2987 p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; 2988 if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) { 2989 error_setg_errno(errp, errno, "inet_ntop failed"); 2990 goto error; 2991 } 2992 2993 address_item = g_malloc0(sizeof(*address_item)); 2994 address_item->ip_address = g_strdup(addr4); 2995 address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4; 2996 2997 if (ifa->ifa_netmask) { 2998 /* Count the number of set bits in netmask. 2999 * This is safe as '1' and '0' cannot be shuffled in netmask. */ 3000 p = &((struct sockaddr_in *)ifa->ifa_netmask)->sin_addr; 3001 address_item->prefix = ctpop32(((uint32_t *) p)[0]); 3002 } 3003 } else if (ifa->ifa_addr && 3004 ifa->ifa_addr->sa_family == AF_INET6) { 3005 /* interface with IPv6 address */ 3006 p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; 3007 if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) { 3008 error_setg_errno(errp, errno, "inet_ntop failed"); 3009 goto error; 3010 } 3011 3012 address_item = g_malloc0(sizeof(*address_item)); 3013 address_item->ip_address = g_strdup(addr6); 3014 address_item->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6; 3015 3016 if (ifa->ifa_netmask) { 3017 /* Count the number of set bits in netmask. 3018 * This is safe as '1' and '0' cannot be shuffled in netmask. */ 3019 p = &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; 3020 address_item->prefix = 3021 ctpop32(((uint32_t *) p)[0]) + 3022 ctpop32(((uint32_t *) p)[1]) + 3023 ctpop32(((uint32_t *) p)[2]) + 3024 ctpop32(((uint32_t *) p)[3]); 3025 } 3026 } 3027 3028 if (!address_item) { 3029 continue; 3030 } 3031 3032 address_tail = &info->ip_addresses; 3033 while (*address_tail) { 3034 address_tail = &(*address_tail)->next; 3035 } 3036 QAPI_LIST_APPEND(address_tail, address_item); 3037 3038 info->has_ip_addresses = true; 3039 3040 if (!info->has_statistics) { 3041 interface_stat = g_malloc0(sizeof(*interface_stat)); 3042 if (guest_get_network_stats(info->name, interface_stat) == -1) { 3043 info->has_statistics = false; 3044 g_free(interface_stat); 3045 } else { 3046 info->statistics = interface_stat; 3047 info->has_statistics = true; 3048 } 3049 } 3050 } 3051 3052 freeifaddrs(ifap); 3053 return head; 3054 3055 error: 3056 freeifaddrs(ifap); 3057 qapi_free_GuestNetworkInterfaceList(head); 3058 return NULL; 3059 } 3060 3061 #else 3062 3063 GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp) 3064 { 3065 error_setg(errp, QERR_UNSUPPORTED); 3066 return NULL; 3067 } 3068 3069 #endif /* HAVE_GETIFADDRS */ 3070 3071 #if !defined(CONFIG_FSFREEZE) 3072 3073 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) 3074 { 3075 error_setg(errp, QERR_UNSUPPORTED); 3076 return NULL; 3077 } 3078 3079 GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp) 3080 { 3081 error_setg(errp, QERR_UNSUPPORTED); 3082 3083 return 0; 3084 } 3085 3086 int64_t qmp_guest_fsfreeze_freeze(Error **errp) 3087 { 3088 error_setg(errp, QERR_UNSUPPORTED); 3089 3090 return 0; 3091 } 3092 3093 int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints, 3094 strList *mountpoints, 3095 Error **errp) 3096 { 3097 error_setg(errp, QERR_UNSUPPORTED); 3098 3099 return 0; 3100 } 3101 3102 int64_t qmp_guest_fsfreeze_thaw(Error **errp) 3103 { 3104 error_setg(errp, QERR_UNSUPPORTED); 3105 3106 return 0; 3107 } 3108 3109 GuestDiskInfoList *qmp_guest_get_disks(Error **errp) 3110 { 3111 error_setg(errp, QERR_UNSUPPORTED); 3112 return NULL; 3113 } 3114 3115 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) 3116 { 3117 error_setg(errp, QERR_UNSUPPORTED); 3118 return NULL; 3119 } 3120 3121 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) 3122 { 3123 error_setg(errp, QERR_UNSUPPORTED); 3124 return NULL; 3125 } 3126 3127 #endif /* CONFIG_FSFREEZE */ 3128 3129 #if !defined(CONFIG_FSTRIM) 3130 GuestFilesystemTrimResponse * 3131 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) 3132 { 3133 error_setg(errp, QERR_UNSUPPORTED); 3134 return NULL; 3135 } 3136 #endif 3137 3138 /* add unsupported commands to the list of blocked RPCs */ 3139 GList *ga_command_init_blockedrpcs(GList *blockedrpcs) 3140 { 3141 #if !defined(__linux__) 3142 { 3143 const char *list[] = { 3144 "guest-suspend-disk", "guest-suspend-ram", 3145 "guest-suspend-hybrid", "guest-get-vcpus", "guest-set-vcpus", 3146 "guest-get-memory-blocks", "guest-set-memory-blocks", 3147 "guest-get-memory-block-size", "guest-get-memory-block-info", 3148 NULL}; 3149 char **p = (char **)list; 3150 3151 while (*p) { 3152 blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++)); 3153 } 3154 } 3155 #endif 3156 3157 #if !defined(HAVE_GETIFADDRS) 3158 blockedrpcs = g_list_append(blockedrpcs, 3159 g_strdup("guest-network-get-interfaces")); 3160 #endif 3161 3162 #if !defined(CONFIG_FSFREEZE) 3163 { 3164 const char *list[] = { 3165 "guest-get-fsinfo", "guest-fsfreeze-status", 3166 "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list", 3167 "guest-fsfreeze-thaw", "guest-get-fsinfo", 3168 "guest-get-disks", NULL}; 3169 char **p = (char **)list; 3170 3171 while (*p) { 3172 blockedrpcs = g_list_append(blockedrpcs, g_strdup(*p++)); 3173 } 3174 } 3175 #endif 3176 3177 #if !defined(CONFIG_FSTRIM) 3178 blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-fstrim")); 3179 #endif 3180 3181 blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-get-devices")); 3182 3183 return blockedrpcs; 3184 } 3185 3186 /* register init/cleanup routines for stateful command groups */ 3187 void ga_command_state_init(GAState *s, GACommandState *cs) 3188 { 3189 #if defined(CONFIG_FSFREEZE) 3190 ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup); 3191 #endif 3192 } 3193 3194 #ifdef HAVE_UTMPX 3195 3196 #define QGA_MICRO_SECOND_TO_SECOND 1000000 3197 3198 static double ga_get_login_time(struct utmpx *user_info) 3199 { 3200 double seconds = (double)user_info->ut_tv.tv_sec; 3201 double useconds = (double)user_info->ut_tv.tv_usec; 3202 useconds /= QGA_MICRO_SECOND_TO_SECOND; 3203 return seconds + useconds; 3204 } 3205 3206 GuestUserList *qmp_guest_get_users(Error **errp) 3207 { 3208 GHashTable *cache = NULL; 3209 GuestUserList *head = NULL, **tail = &head; 3210 struct utmpx *user_info = NULL; 3211 gpointer value = NULL; 3212 GuestUser *user = NULL; 3213 double login_time = 0; 3214 3215 cache = g_hash_table_new(g_str_hash, g_str_equal); 3216 setutxent(); 3217 3218 for (;;) { 3219 user_info = getutxent(); 3220 if (user_info == NULL) { 3221 break; 3222 } else if (user_info->ut_type != USER_PROCESS) { 3223 continue; 3224 } else if (g_hash_table_contains(cache, user_info->ut_user)) { 3225 value = g_hash_table_lookup(cache, user_info->ut_user); 3226 user = (GuestUser *)value; 3227 login_time = ga_get_login_time(user_info); 3228 /* We're ensuring the earliest login time to be sent */ 3229 if (login_time < user->login_time) { 3230 user->login_time = login_time; 3231 } 3232 continue; 3233 } 3234 3235 user = g_new0(GuestUser, 1); 3236 user->user = g_strdup(user_info->ut_user); 3237 user->login_time = ga_get_login_time(user_info); 3238 3239 g_hash_table_insert(cache, user->user, user); 3240 3241 QAPI_LIST_APPEND(tail, user); 3242 } 3243 endutxent(); 3244 g_hash_table_destroy(cache); 3245 return head; 3246 } 3247 3248 #else 3249 3250 GuestUserList *qmp_guest_get_users(Error **errp) 3251 { 3252 error_setg(errp, QERR_UNSUPPORTED); 3253 return NULL; 3254 } 3255 3256 #endif 3257 3258 /* Replace escaped special characters with theire real values. The replacement 3259 * is done in place -- returned value is in the original string. 3260 */ 3261 static void ga_osrelease_replace_special(gchar *value) 3262 { 3263 gchar *p, *p2, quote; 3264 3265 /* Trim the string at first space or semicolon if it is not enclosed in 3266 * single or double quotes. */ 3267 if ((value[0] != '"') || (value[0] == '\'')) { 3268 p = strchr(value, ' '); 3269 if (p != NULL) { 3270 *p = 0; 3271 } 3272 p = strchr(value, ';'); 3273 if (p != NULL) { 3274 *p = 0; 3275 } 3276 return; 3277 } 3278 3279 quote = value[0]; 3280 p2 = value; 3281 p = value + 1; 3282 while (*p != 0) { 3283 if (*p == '\\') { 3284 p++; 3285 switch (*p) { 3286 case '$': 3287 case '\'': 3288 case '"': 3289 case '\\': 3290 case '`': 3291 break; 3292 default: 3293 /* Keep literal backslash followed by whatever is there */ 3294 p--; 3295 break; 3296 } 3297 } else if (*p == quote) { 3298 *p2 = 0; 3299 break; 3300 } 3301 *(p2++) = *(p++); 3302 } 3303 } 3304 3305 static GKeyFile *ga_parse_osrelease(const char *fname) 3306 { 3307 gchar *content = NULL; 3308 gchar *content2 = NULL; 3309 GError *err = NULL; 3310 GKeyFile *keys = g_key_file_new(); 3311 const char *group = "[os-release]\n"; 3312 3313 if (!g_file_get_contents(fname, &content, NULL, &err)) { 3314 slog("failed to read '%s', error: %s", fname, err->message); 3315 goto fail; 3316 } 3317 3318 if (!g_utf8_validate(content, -1, NULL)) { 3319 slog("file is not utf-8 encoded: %s", fname); 3320 goto fail; 3321 } 3322 content2 = g_strdup_printf("%s%s", group, content); 3323 3324 if (!g_key_file_load_from_data(keys, content2, -1, G_KEY_FILE_NONE, 3325 &err)) { 3326 slog("failed to parse file '%s', error: %s", fname, err->message); 3327 goto fail; 3328 } 3329 3330 g_free(content); 3331 g_free(content2); 3332 return keys; 3333 3334 fail: 3335 g_error_free(err); 3336 g_free(content); 3337 g_free(content2); 3338 g_key_file_free(keys); 3339 return NULL; 3340 } 3341 3342 GuestOSInfo *qmp_guest_get_osinfo(Error **errp) 3343 { 3344 GuestOSInfo *info = NULL; 3345 struct utsname kinfo; 3346 GKeyFile *osrelease = NULL; 3347 const char *qga_os_release = g_getenv("QGA_OS_RELEASE"); 3348 3349 info = g_new0(GuestOSInfo, 1); 3350 3351 if (uname(&kinfo) != 0) { 3352 error_setg_errno(errp, errno, "uname failed"); 3353 } else { 3354 info->has_kernel_version = true; 3355 info->kernel_version = g_strdup(kinfo.version); 3356 info->has_kernel_release = true; 3357 info->kernel_release = g_strdup(kinfo.release); 3358 info->has_machine = true; 3359 info->machine = g_strdup(kinfo.machine); 3360 } 3361 3362 if (qga_os_release != NULL) { 3363 osrelease = ga_parse_osrelease(qga_os_release); 3364 } else { 3365 osrelease = ga_parse_osrelease("/etc/os-release"); 3366 if (osrelease == NULL) { 3367 osrelease = ga_parse_osrelease("/usr/lib/os-release"); 3368 } 3369 } 3370 3371 if (osrelease != NULL) { 3372 char *value; 3373 3374 #define GET_FIELD(field, osfield) do { \ 3375 value = g_key_file_get_value(osrelease, "os-release", osfield, NULL); \ 3376 if (value != NULL) { \ 3377 ga_osrelease_replace_special(value); \ 3378 info->has_ ## field = true; \ 3379 info->field = value; \ 3380 } \ 3381 } while (0) 3382 GET_FIELD(id, "ID"); 3383 GET_FIELD(name, "NAME"); 3384 GET_FIELD(pretty_name, "PRETTY_NAME"); 3385 GET_FIELD(version, "VERSION"); 3386 GET_FIELD(version_id, "VERSION_ID"); 3387 GET_FIELD(variant, "VARIANT"); 3388 GET_FIELD(variant_id, "VARIANT_ID"); 3389 #undef GET_FIELD 3390 3391 g_key_file_free(osrelease); 3392 } 3393 3394 return info; 3395 } 3396 3397 GuestDeviceInfoList *qmp_guest_get_devices(Error **errp) 3398 { 3399 error_setg(errp, QERR_UNSUPPORTED); 3400 3401 return NULL; 3402 } 3403 3404 #ifndef HOST_NAME_MAX 3405 # ifdef _POSIX_HOST_NAME_MAX 3406 # define HOST_NAME_MAX _POSIX_HOST_NAME_MAX 3407 # else 3408 # define HOST_NAME_MAX 255 3409 # endif 3410 #endif 3411 3412 char *qga_get_host_name(Error **errp) 3413 { 3414 long len = -1; 3415 g_autofree char *hostname = NULL; 3416 3417 #ifdef _SC_HOST_NAME_MAX 3418 len = sysconf(_SC_HOST_NAME_MAX); 3419 #endif /* _SC_HOST_NAME_MAX */ 3420 3421 if (len < 0) { 3422 len = HOST_NAME_MAX; 3423 } 3424 3425 /* Unfortunately, gethostname() below does not guarantee a 3426 * NULL terminated string. Therefore, allocate one byte more 3427 * to be sure. */ 3428 hostname = g_new0(char, len + 1); 3429 3430 if (gethostname(hostname, len) < 0) { 3431 error_setg_errno(errp, errno, 3432 "cannot get hostname"); 3433 return NULL; 3434 } 3435 3436 return g_steal_pointer(&hostname); 3437 } 3438