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