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