1 /* 2 * QEMU Guest Agent Linux-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 "qapi/error.h" 16 #include "qga-qapi-commands.h" 17 #include "qapi/error.h" 18 #include "qapi/qmp/qerror.h" 19 #include "commands-common.h" 20 #include "cutils.h" 21 #include <mntent.h> 22 #include <sys/ioctl.h> 23 #include <mntent.h> 24 #include <linux/nvme_ioctl.h> 25 #include "block/nvme.h" 26 27 #ifdef CONFIG_LIBUDEV 28 #include <libudev.h> 29 #endif 30 31 #ifdef HAVE_GETIFADDRS 32 #include <net/if.h> 33 #endif 34 35 #include <sys/statvfs.h> 36 37 #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) 38 static int dev_major_minor(const char *devpath, 39 unsigned int *devmajor, unsigned int *devminor) 40 { 41 struct stat st; 42 43 *devmajor = 0; 44 *devminor = 0; 45 46 if (stat(devpath, &st) < 0) { 47 slog("failed to stat device file '%s': %s", devpath, strerror(errno)); 48 return -1; 49 } 50 if (S_ISDIR(st.st_mode)) { 51 /* It is bind mount */ 52 return -2; 53 } 54 if (S_ISBLK(st.st_mode)) { 55 *devmajor = major(st.st_rdev); 56 *devminor = minor(st.st_rdev); 57 return 0; 58 } 59 return -1; 60 } 61 62 static bool build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) 63 { 64 struct mntent *ment; 65 FsMount *mount; 66 char const *mtab = "/proc/self/mounts"; 67 FILE *fp; 68 unsigned int devmajor, devminor; 69 70 fp = setmntent(mtab, "r"); 71 if (!fp) { 72 error_setg(errp, "failed to open mtab file: '%s'", mtab); 73 return false; 74 } 75 76 while ((ment = getmntent(fp))) { 77 /* 78 * An entry which device name doesn't start with a '/' is 79 * either a dummy file system or a network file system. 80 * Add special handling for smbfs and cifs as is done by 81 * coreutils as well. 82 */ 83 if ((ment->mnt_fsname[0] != '/') || 84 (strcmp(ment->mnt_type, "smbfs") == 0) || 85 (strcmp(ment->mnt_type, "cifs") == 0)) { 86 continue; 87 } 88 if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { 89 /* Skip bind mounts */ 90 continue; 91 } 92 93 mount = g_new0(FsMount, 1); 94 mount->dirname = g_strdup(ment->mnt_dir); 95 mount->devtype = g_strdup(ment->mnt_type); 96 mount->devmajor = devmajor; 97 mount->devminor = devminor; 98 99 QTAILQ_INSERT_TAIL(mounts, mount, next); 100 } 101 102 endmntent(fp); 103 return true; 104 } 105 106 static void decode_mntname(char *name, int len) 107 { 108 int i, j = 0; 109 for (i = 0; i <= len; i++) { 110 if (name[i] != '\\') { 111 name[j++] = name[i]; 112 } else if (name[i + 1] == '\\') { 113 name[j++] = '\\'; 114 i++; 115 } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && 116 name[i + 2] >= '0' && name[i + 2] <= '7' && 117 name[i + 3] >= '0' && name[i + 3] <= '7') { 118 name[j++] = (name[i + 1] - '0') * 64 + 119 (name[i + 2] - '0') * 8 + 120 (name[i + 3] - '0'); 121 i += 3; 122 } else { 123 name[j++] = name[i]; 124 } 125 } 126 } 127 128 /* 129 * Walk the mount table and build a list of local file systems 130 */ 131 bool build_fs_mount_list(FsMountList *mounts, Error **errp) 132 { 133 FsMount *mount; 134 char const *mountinfo = "/proc/self/mountinfo"; 135 FILE *fp; 136 char *line = NULL, *dash; 137 size_t n; 138 char check; 139 unsigned int devmajor, devminor; 140 int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; 141 142 fp = fopen(mountinfo, "r"); 143 if (!fp) { 144 return build_fs_mount_list_from_mtab(mounts, errp); 145 } 146 147 while (getline(&line, &n, fp) != -1) { 148 ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", 149 &devmajor, &devminor, &dir_s, &dir_e, &check); 150 if (ret < 3) { 151 continue; 152 } 153 dash = strstr(line + dir_e, " - "); 154 if (!dash) { 155 continue; 156 } 157 ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", 158 &type_s, &type_e, &dev_s, &dev_e, &check); 159 if (ret < 1) { 160 continue; 161 } 162 line[dir_e] = 0; 163 dash[type_e] = 0; 164 dash[dev_e] = 0; 165 decode_mntname(line + dir_s, dir_e - dir_s); 166 decode_mntname(dash + dev_s, dev_e - dev_s); 167 if (devmajor == 0) { 168 /* btrfs reports major number = 0 */ 169 if (strcmp("btrfs", dash + type_s) != 0 || 170 dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { 171 continue; 172 } 173 } 174 175 mount = g_new0(FsMount, 1); 176 mount->dirname = g_strdup(line + dir_s); 177 mount->devtype = g_strdup(dash + type_s); 178 mount->devmajor = devmajor; 179 mount->devminor = devminor; 180 181 QTAILQ_INSERT_TAIL(mounts, mount, next); 182 } 183 free(line); 184 185 fclose(fp); 186 return true; 187 } 188 #endif /* CONFIG_FSFREEZE || CONFIG_FSTRIM */ 189 190 #ifdef CONFIG_FSFREEZE 191 /* 192 * Walk list of mounted file systems in the guest, and freeze the ones which 193 * are real local file systems. 194 */ 195 int64_t qmp_guest_fsfreeze_do_freeze_list(bool has_mountpoints, 196 strList *mountpoints, 197 FsMountList mounts, 198 Error **errp) 199 { 200 struct FsMount *mount; 201 strList *list; 202 int fd, ret, i = 0; 203 204 QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { 205 /* To issue fsfreeze in the reverse order of mounts, check if the 206 * mount is listed in the list here */ 207 if (has_mountpoints) { 208 for (list = mountpoints; list; list = list->next) { 209 if (strcmp(list->value, mount->dirname) == 0) { 210 break; 211 } 212 } 213 if (!list) { 214 continue; 215 } 216 } 217 218 fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); 219 if (fd == -1) { 220 error_setg_errno(errp, errno, "failed to open %s", mount->dirname); 221 return -1; 222 } 223 224 /* we try to cull filesystems we know won't work in advance, but other 225 * filesystems may not implement fsfreeze for less obvious reasons. 226 * these will report EOPNOTSUPP. we simply ignore these when tallying 227 * the number of frozen filesystems. 228 * if a filesystem is mounted more than once (aka bind mount) a 229 * consecutive attempt to freeze an already frozen filesystem will 230 * return EBUSY. 231 * 232 * any other error means a failure to freeze a filesystem we 233 * expect to be freezable, so return an error in those cases 234 * and return system to thawed state. 235 */ 236 ret = ioctl(fd, FIFREEZE); 237 if (ret == -1) { 238 if (errno != EOPNOTSUPP && errno != EBUSY) { 239 error_setg_errno(errp, errno, "failed to freeze %s", 240 mount->dirname); 241 close(fd); 242 return -1; 243 } 244 } else { 245 i++; 246 } 247 close(fd); 248 } 249 return i; 250 } 251 252 int qmp_guest_fsfreeze_do_thaw(Error **errp) 253 { 254 int ret; 255 FsMountList mounts; 256 FsMount *mount; 257 int fd, i = 0, logged; 258 Error *local_err = NULL; 259 260 QTAILQ_INIT(&mounts); 261 if (!build_fs_mount_list(&mounts, &local_err)) { 262 error_propagate(errp, local_err); 263 return -1; 264 } 265 266 QTAILQ_FOREACH(mount, &mounts, next) { 267 logged = false; 268 fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); 269 if (fd == -1) { 270 continue; 271 } 272 /* we have no way of knowing whether a filesystem was actually unfrozen 273 * as a result of a successful call to FITHAW, only that if an error 274 * was returned the filesystem was *not* unfrozen by that particular 275 * call. 276 * 277 * since multiple preceding FIFREEZEs require multiple calls to FITHAW 278 * to unfreeze, continuing issuing FITHAW until an error is returned, 279 * in which case either the filesystem is in an unfreezable state, or, 280 * more likely, it was thawed previously (and remains so afterward). 281 * 282 * also, since the most recent successful call is the one that did 283 * the actual unfreeze, we can use this to provide an accurate count 284 * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which 285 * may * be useful for determining whether a filesystem was unfrozen 286 * during the freeze/thaw phase by a process other than qemu-ga. 287 */ 288 do { 289 ret = ioctl(fd, FITHAW); 290 if (ret == 0 && !logged) { 291 i++; 292 logged = true; 293 } 294 } while (ret == 0); 295 close(fd); 296 } 297 298 free_fs_mount_list(&mounts); 299 300 return i; 301 } 302 #endif /* CONFIG_FSFREEZE */ 303 304 #if defined(CONFIG_FSFREEZE) 305 306 static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) 307 { 308 char *path; 309 char *dpath; 310 char *driver = NULL; 311 char buf[PATH_MAX]; 312 ssize_t len; 313 314 path = g_strndup(syspath, pathlen); 315 dpath = g_strdup_printf("%s/driver", path); 316 len = readlink(dpath, buf, sizeof(buf) - 1); 317 if (len != -1) { 318 buf[len] = 0; 319 driver = g_path_get_basename(buf); 320 } 321 g_free(dpath); 322 g_free(path); 323 return driver; 324 } 325 326 static int compare_uint(const void *_a, const void *_b) 327 { 328 unsigned int a = *(unsigned int *)_a; 329 unsigned int b = *(unsigned int *)_b; 330 331 return a < b ? -1 : a > b ? 1 : 0; 332 } 333 334 /* Walk the specified sysfs and build a sorted list of host or ata numbers */ 335 static int build_hosts(char const *syspath, char const *host, bool ata, 336 unsigned int *hosts, int hosts_max, Error **errp) 337 { 338 char *path; 339 DIR *dir; 340 struct dirent *entry; 341 int i = 0; 342 343 path = g_strndup(syspath, host - syspath); 344 dir = opendir(path); 345 if (!dir) { 346 error_setg_errno(errp, errno, "opendir(\"%s\")", path); 347 g_free(path); 348 return -1; 349 } 350 351 while (i < hosts_max) { 352 entry = readdir(dir); 353 if (!entry) { 354 break; 355 } 356 if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { 357 ++i; 358 } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { 359 ++i; 360 } 361 } 362 363 qsort(hosts, i, sizeof(hosts[0]), compare_uint); 364 365 g_free(path); 366 closedir(dir); 367 return i; 368 } 369 370 /* 371 * Store disk device info for devices on the PCI bus. 372 * Returns true if information has been stored, or false for failure. 373 */ 374 static bool build_guest_fsinfo_for_pci_dev(char const *syspath, 375 GuestDiskAddress *disk, 376 Error **errp) 377 { 378 unsigned int pci[4], host, hosts[8], tgt[3]; 379 int i, nhosts = 0, pcilen; 380 GuestPCIAddress *pciaddr = disk->pci_controller; 381 bool has_ata = false, has_host = false, has_tgt = false; 382 char *p, *q, *driver = NULL; 383 bool ret = false; 384 385 p = strstr(syspath, "/devices/pci"); 386 if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", 387 pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { 388 g_debug("only pci device is supported: sysfs path '%s'", syspath); 389 return false; 390 } 391 392 p += 12 + pcilen; 393 while (true) { 394 driver = get_pci_driver(syspath, p - syspath, errp); 395 if (driver && (g_str_equal(driver, "ata_piix") || 396 g_str_equal(driver, "sym53c8xx") || 397 g_str_equal(driver, "virtio-pci") || 398 g_str_equal(driver, "ahci") || 399 g_str_equal(driver, "nvme") || 400 g_str_equal(driver, "xhci_hcd") || 401 g_str_equal(driver, "ehci-pci"))) { 402 break; 403 } 404 405 g_free(driver); 406 if (sscanf(p, "/%x:%x:%x.%x%n", 407 pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { 408 p += pcilen; 409 continue; 410 } 411 412 g_debug("unsupported driver or sysfs path '%s'", syspath); 413 return false; 414 } 415 416 p = strstr(syspath, "/target"); 417 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", 418 tgt, tgt + 1, tgt + 2) == 3) { 419 has_tgt = true; 420 } 421 422 p = strstr(syspath, "/ata"); 423 if (p) { 424 q = p + 4; 425 has_ata = true; 426 } else { 427 p = strstr(syspath, "/host"); 428 q = p + 5; 429 } 430 if (p && sscanf(q, "%u", &host) == 1) { 431 has_host = true; 432 nhosts = build_hosts(syspath, p, has_ata, hosts, 433 ARRAY_SIZE(hosts), errp); 434 if (nhosts < 0) { 435 goto cleanup; 436 } 437 } 438 439 pciaddr->domain = pci[0]; 440 pciaddr->bus = pci[1]; 441 pciaddr->slot = pci[2]; 442 pciaddr->function = pci[3]; 443 444 if (strcmp(driver, "ata_piix") == 0) { 445 /* a host per ide bus, target*:0:<unit>:0 */ 446 if (!has_host || !has_tgt) { 447 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); 448 goto cleanup; 449 } 450 for (i = 0; i < nhosts; i++) { 451 if (host == hosts[i]) { 452 disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; 453 disk->bus = i; 454 disk->unit = tgt[1]; 455 break; 456 } 457 } 458 if (i >= nhosts) { 459 g_debug("no host for '%s' (driver '%s')", syspath, driver); 460 goto cleanup; 461 } 462 } else if (strcmp(driver, "sym53c8xx") == 0) { 463 /* scsi(LSI Logic): target*:0:<unit>:0 */ 464 if (!has_tgt) { 465 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); 466 goto cleanup; 467 } 468 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; 469 disk->unit = tgt[1]; 470 } else if (strcmp(driver, "virtio-pci") == 0) { 471 if (has_tgt) { 472 /* virtio-scsi: target*:0:0:<unit> */ 473 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; 474 disk->unit = tgt[2]; 475 } else { 476 /* virtio-blk: 1 disk per 1 device */ 477 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; 478 } 479 } else if (strcmp(driver, "ahci") == 0) { 480 /* ahci: 1 host per 1 unit */ 481 if (!has_host || !has_tgt) { 482 g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); 483 goto cleanup; 484 } 485 for (i = 0; i < nhosts; i++) { 486 if (host == hosts[i]) { 487 disk->unit = i; 488 disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; 489 break; 490 } 491 } 492 if (i >= nhosts) { 493 g_debug("no host for '%s' (driver '%s')", syspath, driver); 494 goto cleanup; 495 } 496 } else if (strcmp(driver, "nvme") == 0) { 497 disk->bus_type = GUEST_DISK_BUS_TYPE_NVME; 498 } else if (strcmp(driver, "ehci-pci") == 0 || strcmp(driver, "xhci_hcd") == 0) { 499 disk->bus_type = GUEST_DISK_BUS_TYPE_USB; 500 } else { 501 g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); 502 goto cleanup; 503 } 504 505 ret = true; 506 507 cleanup: 508 g_free(driver); 509 return ret; 510 } 511 512 /* 513 * Store disk device info for non-PCI virtio devices (for example s390x 514 * channel I/O devices). Returns true if information has been stored, or 515 * false for failure. 516 */ 517 static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, 518 GuestDiskAddress *disk, 519 Error **errp) 520 { 521 unsigned int tgt[3]; 522 char *p; 523 524 if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { 525 g_debug("Unsupported virtio device '%s'", syspath); 526 return false; 527 } 528 529 p = strstr(syspath, "/target"); 530 if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", 531 &tgt[0], &tgt[1], &tgt[2]) == 3) { 532 /* virtio-scsi: target*:0:<target>:<unit> */ 533 disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; 534 disk->bus = tgt[0]; 535 disk->target = tgt[1]; 536 disk->unit = tgt[2]; 537 } else { 538 /* virtio-blk: 1 disk per 1 device */ 539 disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; 540 } 541 542 return true; 543 } 544 545 /* 546 * Store disk device info for CCW devices (s390x channel I/O devices). 547 * Returns true if information has been stored, or false for failure. 548 */ 549 static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, 550 GuestDiskAddress *disk, 551 Error **errp) 552 { 553 unsigned int cssid, ssid, subchno, devno; 554 char *p; 555 556 p = strstr(syspath, "/devices/css"); 557 if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", 558 &cssid, &ssid, &subchno, &devno) < 4) { 559 g_debug("could not parse ccw device sysfs path: %s", syspath); 560 return false; 561 } 562 563 disk->ccw_address = g_new0(GuestCCWAddress, 1); 564 disk->ccw_address->cssid = cssid; 565 disk->ccw_address->ssid = ssid; 566 disk->ccw_address->subchno = subchno; 567 disk->ccw_address->devno = devno; 568 569 if (strstr(p, "/virtio")) { 570 build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); 571 } 572 573 return true; 574 } 575 576 /* Store disk device info specified by @sysfs into @fs */ 577 static void build_guest_fsinfo_for_real_device(char const *syspath, 578 GuestFilesystemInfo *fs, 579 Error **errp) 580 { 581 GuestDiskAddress *disk; 582 GuestPCIAddress *pciaddr; 583 bool has_hwinf; 584 #ifdef CONFIG_LIBUDEV 585 struct udev *udev = NULL; 586 struct udev_device *udevice = NULL; 587 #endif 588 589 pciaddr = g_new0(GuestPCIAddress, 1); 590 pciaddr->domain = -1; /* -1 means field is invalid */ 591 pciaddr->bus = -1; 592 pciaddr->slot = -1; 593 pciaddr->function = -1; 594 595 disk = g_new0(GuestDiskAddress, 1); 596 disk->pci_controller = pciaddr; 597 disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; 598 599 #ifdef CONFIG_LIBUDEV 600 udev = udev_new(); 601 udevice = udev_device_new_from_syspath(udev, syspath); 602 if (udev == NULL || udevice == NULL) { 603 g_debug("failed to query udev"); 604 } else { 605 const char *devnode, *serial; 606 devnode = udev_device_get_devnode(udevice); 607 if (devnode != NULL) { 608 disk->dev = g_strdup(devnode); 609 } 610 serial = udev_device_get_property_value(udevice, "ID_SERIAL"); 611 if (serial != NULL && *serial != 0) { 612 disk->serial = g_strdup(serial); 613 } 614 } 615 616 udev_unref(udev); 617 udev_device_unref(udevice); 618 #endif 619 620 if (strstr(syspath, "/devices/pci")) { 621 has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); 622 } else if (strstr(syspath, "/devices/css")) { 623 has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); 624 } else if (strstr(syspath, "/virtio")) { 625 has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); 626 } else { 627 g_debug("Unsupported device type for '%s'", syspath); 628 has_hwinf = false; 629 } 630 631 if (has_hwinf || disk->dev || disk->serial) { 632 QAPI_LIST_PREPEND(fs->disk, disk); 633 } else { 634 qapi_free_GuestDiskAddress(disk); 635 } 636 } 637 638 static void build_guest_fsinfo_for_device(char const *devpath, 639 GuestFilesystemInfo *fs, 640 Error **errp); 641 642 /* Store a list of slave devices of virtual volume specified by @syspath into 643 * @fs */ 644 static void build_guest_fsinfo_for_virtual_device(char const *syspath, 645 GuestFilesystemInfo *fs, 646 Error **errp) 647 { 648 Error *err = NULL; 649 DIR *dir; 650 char *dirpath; 651 struct dirent *entry; 652 653 dirpath = g_strdup_printf("%s/slaves", syspath); 654 dir = opendir(dirpath); 655 if (!dir) { 656 if (errno != ENOENT) { 657 error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); 658 } 659 g_free(dirpath); 660 return; 661 } 662 663 for (;;) { 664 errno = 0; 665 entry = readdir(dir); 666 if (entry == NULL) { 667 if (errno) { 668 error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); 669 } 670 break; 671 } 672 673 if (entry->d_type == DT_LNK) { 674 char *path; 675 676 g_debug(" slave device '%s'", entry->d_name); 677 path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); 678 build_guest_fsinfo_for_device(path, fs, &err); 679 g_free(path); 680 681 if (err) { 682 error_propagate(errp, err); 683 break; 684 } 685 } 686 } 687 688 g_free(dirpath); 689 closedir(dir); 690 } 691 692 static bool is_disk_virtual(const char *devpath, Error **errp) 693 { 694 g_autofree char *syspath = realpath(devpath, NULL); 695 696 if (!syspath) { 697 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); 698 return false; 699 } 700 return strstr(syspath, "/devices/virtual/block/") != NULL; 701 } 702 703 /* Dispatch to functions for virtual/real device */ 704 static void build_guest_fsinfo_for_device(char const *devpath, 705 GuestFilesystemInfo *fs, 706 Error **errp) 707 { 708 ERRP_GUARD(); 709 g_autofree char *syspath = NULL; 710 bool is_virtual = false; 711 712 syspath = realpath(devpath, NULL); 713 if (!syspath) { 714 if (errno != ENOENT) { 715 error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); 716 return; 717 } 718 719 /* ENOENT: This devpath may not exist because of container config */ 720 if (!fs->name) { 721 fs->name = g_path_get_basename(devpath); 722 } 723 return; 724 } 725 726 if (!fs->name) { 727 fs->name = g_path_get_basename(syspath); 728 } 729 730 g_debug(" parse sysfs path '%s'", syspath); 731 is_virtual = is_disk_virtual(syspath, errp); 732 if (*errp != NULL) { 733 return; 734 } 735 if (is_virtual) { 736 build_guest_fsinfo_for_virtual_device(syspath, fs, errp); 737 } else { 738 build_guest_fsinfo_for_real_device(syspath, fs, errp); 739 } 740 } 741 742 #ifdef CONFIG_LIBUDEV 743 744 /* 745 * Wrapper around build_guest_fsinfo_for_device() for getting just 746 * the disk address. 747 */ 748 static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) 749 { 750 g_autoptr(GuestFilesystemInfo) fs = NULL; 751 752 fs = g_new0(GuestFilesystemInfo, 1); 753 build_guest_fsinfo_for_device(syspath, fs, errp); 754 if (fs->disk != NULL) { 755 return g_steal_pointer(&fs->disk->value); 756 } 757 return NULL; 758 } 759 760 static char *get_alias_for_syspath(const char *syspath) 761 { 762 struct udev *udev = NULL; 763 struct udev_device *udevice = NULL; 764 char *ret = NULL; 765 766 udev = udev_new(); 767 if (udev == NULL) { 768 g_debug("failed to query udev"); 769 goto out; 770 } 771 udevice = udev_device_new_from_syspath(udev, syspath); 772 if (udevice == NULL) { 773 g_debug("failed to query udev for path: %s", syspath); 774 goto out; 775 } else { 776 const char *alias = udev_device_get_property_value( 777 udevice, "DM_NAME"); 778 /* 779 * NULL means there was an error and empty string means there is no 780 * alias. In case of no alias we return NULL instead of empty string. 781 */ 782 if (alias == NULL) { 783 g_debug("failed to query udev for device alias for: %s", 784 syspath); 785 } else if (*alias != 0) { 786 ret = g_strdup(alias); 787 } 788 } 789 790 out: 791 udev_unref(udev); 792 udev_device_unref(udevice); 793 return ret; 794 } 795 796 static char *get_device_for_syspath(const char *syspath) 797 { 798 struct udev *udev = NULL; 799 struct udev_device *udevice = NULL; 800 char *ret = NULL; 801 802 udev = udev_new(); 803 if (udev == NULL) { 804 g_debug("failed to query udev"); 805 goto out; 806 } 807 udevice = udev_device_new_from_syspath(udev, syspath); 808 if (udevice == NULL) { 809 g_debug("failed to query udev for path: %s", syspath); 810 goto out; 811 } else { 812 ret = g_strdup(udev_device_get_devnode(udevice)); 813 } 814 815 out: 816 udev_unref(udev); 817 udev_device_unref(udevice); 818 return ret; 819 } 820 821 static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) 822 { 823 g_autofree char *deps_dir = NULL; 824 const gchar *dep; 825 GDir *dp_deps = NULL; 826 827 /* List dependent disks */ 828 deps_dir = g_strdup_printf("%s/slaves", disk_dir); 829 g_debug(" listing entries in: %s", deps_dir); 830 dp_deps = g_dir_open(deps_dir, 0, NULL); 831 if (dp_deps == NULL) { 832 g_debug("failed to list entries in %s", deps_dir); 833 return; 834 } 835 disk->has_dependencies = true; 836 while ((dep = g_dir_read_name(dp_deps)) != NULL) { 837 g_autofree char *dep_dir = NULL; 838 char *dev_name; 839 840 /* Add dependent disks */ 841 dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); 842 dev_name = get_device_for_syspath(dep_dir); 843 if (dev_name != NULL) { 844 g_debug(" adding dependent device: %s", dev_name); 845 QAPI_LIST_PREPEND(disk->dependencies, dev_name); 846 } 847 } 848 g_dir_close(dp_deps); 849 } 850 851 /* 852 * Detect partitions subdirectory, name is "<disk_name><number>" or 853 * "<disk_name>p<number>" 854 * 855 * @disk_name -- last component of /sys path (e.g. sda) 856 * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) 857 * @disk_dev -- device node of the disk (e.g. /dev/sda) 858 */ 859 static GuestDiskInfoList *get_disk_partitions( 860 GuestDiskInfoList *list, 861 const char *disk_name, const char *disk_dir, 862 const char *disk_dev) 863 { 864 GuestDiskInfoList *ret = list; 865 struct dirent *de_disk; 866 DIR *dp_disk = NULL; 867 size_t len = strlen(disk_name); 868 869 dp_disk = opendir(disk_dir); 870 while ((de_disk = readdir(dp_disk)) != NULL) { 871 g_autofree char *partition_dir = NULL; 872 char *dev_name; 873 GuestDiskInfo *partition; 874 875 if (!(de_disk->d_type & DT_DIR)) { 876 continue; 877 } 878 879 if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && 880 ((*(de_disk->d_name + len) == 'p' && 881 isdigit(*(de_disk->d_name + len + 1))) || 882 isdigit(*(de_disk->d_name + len))))) { 883 continue; 884 } 885 886 partition_dir = g_strdup_printf("%s/%s", 887 disk_dir, de_disk->d_name); 888 dev_name = get_device_for_syspath(partition_dir); 889 if (dev_name == NULL) { 890 g_debug("Failed to get device name for syspath: %s", 891 disk_dir); 892 continue; 893 } 894 partition = g_new0(GuestDiskInfo, 1); 895 partition->name = dev_name; 896 partition->partition = true; 897 partition->has_dependencies = true; 898 /* Add parent disk as dependent for easier tracking of hierarchy */ 899 QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); 900 901 QAPI_LIST_PREPEND(ret, partition); 902 } 903 closedir(dp_disk); 904 905 return ret; 906 } 907 908 static void get_nvme_smart(GuestDiskInfo *disk) 909 { 910 int fd; 911 GuestNVMeSmart *smart; 912 NvmeSmartLog log = {0}; 913 struct nvme_admin_cmd cmd = { 914 .opcode = NVME_ADM_CMD_GET_LOG_PAGE, 915 .nsid = NVME_NSID_BROADCAST, 916 .addr = (uintptr_t)&log, 917 .data_len = sizeof(log), 918 .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */ 919 | (((sizeof(log) >> 2) - 1) << 16) 920 }; 921 922 fd = qga_open_cloexec(disk->name, O_RDONLY, 0); 923 if (fd == -1) { 924 g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno)); 925 return; 926 } 927 928 if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) { 929 g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno)); 930 close(fd); 931 return; 932 } 933 934 disk->smart = g_new0(GuestDiskSmart, 1); 935 disk->smart->type = GUEST_DISK_BUS_TYPE_NVME; 936 937 smart = &disk->smart->u.nvme; 938 smart->critical_warning = log.critical_warning; 939 smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */ 940 smart->available_spare = log.available_spare; 941 smart->available_spare_threshold = log.available_spare_threshold; 942 smart->percentage_used = log.percentage_used; 943 smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]); 944 smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]); 945 smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]); 946 smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]); 947 smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]); 948 smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]); 949 smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]); 950 smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]); 951 smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]); 952 smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]); 953 smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]); 954 smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]); 955 smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]); 956 smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]); 957 smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]); 958 smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]); 959 smart->media_errors_lo = le64_to_cpu(log.media_errors[0]); 960 smart->media_errors_hi = le64_to_cpu(log.media_errors[1]); 961 smart->number_of_error_log_entries_lo = 962 le64_to_cpu(log.number_of_error_log_entries[0]); 963 smart->number_of_error_log_entries_hi = 964 le64_to_cpu(log.number_of_error_log_entries[1]); 965 966 close(fd); 967 } 968 969 static void get_disk_smart(GuestDiskInfo *disk) 970 { 971 if (disk->address 972 && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) { 973 get_nvme_smart(disk); 974 } 975 } 976 977 GuestDiskInfoList *qmp_guest_get_disks(Error **errp) 978 { 979 GuestDiskInfoList *ret = NULL; 980 GuestDiskInfo *disk; 981 DIR *dp = NULL; 982 struct dirent *de = NULL; 983 984 g_debug("listing /sys/block directory"); 985 dp = opendir("/sys/block"); 986 if (dp == NULL) { 987 error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); 988 return NULL; 989 } 990 while ((de = readdir(dp)) != NULL) { 991 g_autofree char *disk_dir = NULL, *line = NULL, 992 *size_path = NULL; 993 char *dev_name; 994 Error *local_err = NULL; 995 if (de->d_type != DT_LNK) { 996 g_debug(" skipping entry: %s", de->d_name); 997 continue; 998 } 999 1000 /* Check size and skip zero-sized disks */ 1001 g_debug(" checking disk size"); 1002 size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); 1003 if (!g_file_get_contents(size_path, &line, NULL, NULL)) { 1004 g_debug(" failed to read disk size"); 1005 continue; 1006 } 1007 if (g_strcmp0(line, "0\n") == 0) { 1008 g_debug(" skipping zero-sized disk"); 1009 continue; 1010 } 1011 1012 g_debug(" adding %s", de->d_name); 1013 disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); 1014 dev_name = get_device_for_syspath(disk_dir); 1015 if (dev_name == NULL) { 1016 g_debug("Failed to get device name for syspath: %s", 1017 disk_dir); 1018 continue; 1019 } 1020 disk = g_new0(GuestDiskInfo, 1); 1021 disk->name = dev_name; 1022 disk->partition = false; 1023 disk->alias = get_alias_for_syspath(disk_dir); 1024 QAPI_LIST_PREPEND(ret, disk); 1025 1026 /* Get address for non-virtual devices */ 1027 bool is_virtual = is_disk_virtual(disk_dir, &local_err); 1028 if (local_err != NULL) { 1029 g_debug(" failed to check disk path, ignoring error: %s", 1030 error_get_pretty(local_err)); 1031 error_free(local_err); 1032 local_err = NULL; 1033 /* Don't try to get the address */ 1034 is_virtual = true; 1035 } 1036 if (!is_virtual) { 1037 disk->address = get_disk_address(disk_dir, &local_err); 1038 if (local_err != NULL) { 1039 g_debug(" failed to get device info, ignoring error: %s", 1040 error_get_pretty(local_err)); 1041 error_free(local_err); 1042 local_err = NULL; 1043 } 1044 } 1045 1046 get_disk_deps(disk_dir, disk); 1047 get_disk_smart(disk); 1048 ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); 1049 } 1050 1051 closedir(dp); 1052 1053 return ret; 1054 } 1055 1056 #endif 1057 1058 /* Return a list of the disk device(s)' info which @mount lies on */ 1059 static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, 1060 Error **errp) 1061 { 1062 GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); 1063 struct statvfs buf; 1064 unsigned long used, nonroot_total, fr_size; 1065 char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", 1066 mount->devmajor, mount->devminor); 1067 1068 fs->mountpoint = g_strdup(mount->dirname); 1069 fs->type = g_strdup(mount->devtype); 1070 build_guest_fsinfo_for_device(devpath, fs, errp); 1071 1072 if (statvfs(fs->mountpoint, &buf) == 0) { 1073 fr_size = buf.f_frsize; 1074 used = buf.f_blocks - buf.f_bfree; 1075 nonroot_total = used + buf.f_bavail; 1076 fs->used_bytes = used * fr_size; 1077 fs->total_bytes = nonroot_total * fr_size; 1078 fs->total_bytes_privileged = buf.f_blocks * fr_size; 1079 1080 fs->has_total_bytes = true; 1081 fs->has_total_bytes_privileged = true; 1082 fs->has_used_bytes = true; 1083 } 1084 1085 g_free(devpath); 1086 1087 return fs; 1088 } 1089 1090 GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) 1091 { 1092 FsMountList mounts; 1093 struct FsMount *mount; 1094 GuestFilesystemInfoList *ret = NULL; 1095 Error *local_err = NULL; 1096 1097 QTAILQ_INIT(&mounts); 1098 if (!build_fs_mount_list(&mounts, &local_err)) { 1099 error_propagate(errp, local_err); 1100 return NULL; 1101 } 1102 1103 QTAILQ_FOREACH(mount, &mounts, next) { 1104 g_debug("Building guest fsinfo for '%s'", mount->dirname); 1105 1106 QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); 1107 if (local_err) { 1108 error_propagate(errp, local_err); 1109 qapi_free_GuestFilesystemInfoList(ret); 1110 ret = NULL; 1111 break; 1112 } 1113 } 1114 1115 free_fs_mount_list(&mounts); 1116 return ret; 1117 } 1118 #endif /* CONFIG_FSFREEZE */ 1119 1120 #if defined(CONFIG_FSTRIM) 1121 /* 1122 * Walk list of mounted file systems in the guest, and trim them. 1123 */ 1124 GuestFilesystemTrimResponse * 1125 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) 1126 { 1127 GuestFilesystemTrimResponse *response; 1128 GuestFilesystemTrimResult *result; 1129 int ret = 0; 1130 FsMountList mounts; 1131 struct FsMount *mount; 1132 int fd; 1133 struct fstrim_range r; 1134 1135 slog("guest-fstrim called"); 1136 1137 QTAILQ_INIT(&mounts); 1138 if (!build_fs_mount_list(&mounts, errp)) { 1139 return NULL; 1140 } 1141 1142 response = g_malloc0(sizeof(*response)); 1143 1144 QTAILQ_FOREACH(mount, &mounts, next) { 1145 result = g_malloc0(sizeof(*result)); 1146 result->path = g_strdup(mount->dirname); 1147 1148 QAPI_LIST_PREPEND(response->paths, result); 1149 1150 fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); 1151 if (fd == -1) { 1152 result->error = g_strdup_printf("failed to open: %s", 1153 strerror(errno)); 1154 continue; 1155 } 1156 1157 /* We try to cull filesystems we know won't work in advance, but other 1158 * filesystems may not implement fstrim for less obvious reasons. 1159 * These will report EOPNOTSUPP; while in some other cases ENOTTY 1160 * will be reported (e.g. CD-ROMs). 1161 * Any other error means an unexpected error. 1162 */ 1163 r.start = 0; 1164 r.len = -1; 1165 r.minlen = has_minimum ? minimum : 0; 1166 ret = ioctl(fd, FITRIM, &r); 1167 if (ret == -1) { 1168 if (errno == ENOTTY || errno == EOPNOTSUPP) { 1169 result->error = g_strdup("trim not supported"); 1170 } else { 1171 result->error = g_strdup_printf("failed to trim: %s", 1172 strerror(errno)); 1173 } 1174 close(fd); 1175 continue; 1176 } 1177 1178 result->has_minimum = true; 1179 result->minimum = r.minlen; 1180 result->has_trimmed = true; 1181 result->trimmed = r.len; 1182 close(fd); 1183 } 1184 1185 free_fs_mount_list(&mounts); 1186 return response; 1187 } 1188 #endif /* CONFIG_FSTRIM */ 1189 1190 #define LINUX_SYS_STATE_FILE "/sys/power/state" 1191 #define SUSPEND_SUPPORTED 0 1192 #define SUSPEND_NOT_SUPPORTED 1 1193 1194 typedef enum { 1195 SUSPEND_MODE_DISK = 0, 1196 SUSPEND_MODE_RAM = 1, 1197 SUSPEND_MODE_HYBRID = 2, 1198 } SuspendMode; 1199 1200 /* 1201 * Executes a command in a child process using g_spawn_sync, 1202 * returning an int >= 0 representing the exit status of the 1203 * process. 1204 * 1205 * If the program wasn't found in path, returns -1. 1206 * 1207 * If a problem happened when creating the child process, 1208 * returns -1 and errp is set. 1209 */ 1210 static int run_process_child(const char *command[], Error **errp) 1211 { 1212 int exit_status, spawn_flag; 1213 GError *g_err = NULL; 1214 bool success; 1215 1216 spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | 1217 G_SPAWN_STDERR_TO_DEV_NULL; 1218 1219 success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag, 1220 NULL, NULL, NULL, NULL, 1221 &exit_status, &g_err); 1222 1223 if (success) { 1224 return WEXITSTATUS(exit_status); 1225 } 1226 1227 if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { 1228 error_setg(errp, "failed to create child process, error '%s'", 1229 g_err->message); 1230 } 1231 1232 g_error_free(g_err); 1233 return -1; 1234 } 1235 1236 static bool systemd_supports_mode(SuspendMode mode, Error **errp) 1237 { 1238 const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", 1239 "systemd-hybrid-sleep"}; 1240 const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; 1241 int status; 1242 1243 status = run_process_child(cmd, errp); 1244 1245 /* 1246 * systemctl status uses LSB return codes so we can expect 1247 * status > 0 and be ok. To assert if the guest has support 1248 * for the selected suspend mode, status should be < 4. 4 is 1249 * the code for unknown service status, the return value when 1250 * the service does not exist. A common value is status = 3 1251 * (program is not running). 1252 */ 1253 if (status > 0 && status < 4) { 1254 return true; 1255 } 1256 1257 return false; 1258 } 1259 1260 static void systemd_suspend(SuspendMode mode, Error **errp) 1261 { 1262 Error *local_err = NULL; 1263 const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; 1264 const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; 1265 int status; 1266 1267 status = run_process_child(cmd, &local_err); 1268 1269 if (status == 0) { 1270 return; 1271 } 1272 1273 if ((status == -1) && !local_err) { 1274 error_setg(errp, "the helper program 'systemctl %s' was not found", 1275 systemctl_args[mode]); 1276 return; 1277 } 1278 1279 if (local_err) { 1280 error_propagate(errp, local_err); 1281 } else { 1282 error_setg(errp, "the helper program 'systemctl %s' returned an " 1283 "unexpected exit status code (%d)", 1284 systemctl_args[mode], status); 1285 } 1286 } 1287 1288 static bool pmutils_supports_mode(SuspendMode mode, Error **errp) 1289 { 1290 Error *local_err = NULL; 1291 const char *pmutils_args[3] = {"--hibernate", "--suspend", 1292 "--suspend-hybrid"}; 1293 const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; 1294 int status; 1295 1296 status = run_process_child(cmd, &local_err); 1297 1298 if (status == SUSPEND_SUPPORTED) { 1299 return true; 1300 } 1301 1302 if ((status == -1) && !local_err) { 1303 return false; 1304 } 1305 1306 if (local_err) { 1307 error_propagate(errp, local_err); 1308 } else { 1309 error_setg(errp, 1310 "the helper program '%s' returned an unexpected exit" 1311 " status code (%d)", "pm-is-supported", status); 1312 } 1313 1314 return false; 1315 } 1316 1317 static void pmutils_suspend(SuspendMode mode, Error **errp) 1318 { 1319 Error *local_err = NULL; 1320 const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", 1321 "pm-suspend-hybrid"}; 1322 const char *cmd[2] = {pmutils_binaries[mode], NULL}; 1323 int status; 1324 1325 status = run_process_child(cmd, &local_err); 1326 1327 if (status == 0) { 1328 return; 1329 } 1330 1331 if ((status == -1) && !local_err) { 1332 error_setg(errp, "the helper program '%s' was not found", 1333 pmutils_binaries[mode]); 1334 return; 1335 } 1336 1337 if (local_err) { 1338 error_propagate(errp, local_err); 1339 } else { 1340 error_setg(errp, 1341 "the helper program '%s' returned an unexpected exit" 1342 " status code (%d)", pmutils_binaries[mode], status); 1343 } 1344 } 1345 1346 static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) 1347 { 1348 const char *sysfile_strs[3] = {"disk", "mem", NULL}; 1349 const char *sysfile_str = sysfile_strs[mode]; 1350 char buf[32]; /* hopefully big enough */ 1351 int fd; 1352 ssize_t ret; 1353 1354 if (!sysfile_str) { 1355 error_setg(errp, "unknown guest suspend mode"); 1356 return false; 1357 } 1358 1359 fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); 1360 if (fd < 0) { 1361 return false; 1362 } 1363 1364 ret = read(fd, buf, sizeof(buf) - 1); 1365 close(fd); 1366 if (ret <= 0) { 1367 return false; 1368 } 1369 buf[ret] = '\0'; 1370 1371 if (strstr(buf, sysfile_str)) { 1372 return true; 1373 } 1374 return false; 1375 } 1376 1377 static void linux_sys_state_suspend(SuspendMode mode, Error **errp) 1378 { 1379 g_autoptr(GError) local_gerr = NULL; 1380 const char *sysfile_strs[3] = {"disk", "mem", NULL}; 1381 const char *sysfile_str = sysfile_strs[mode]; 1382 1383 if (!sysfile_str) { 1384 error_setg(errp, "unknown guest suspend mode"); 1385 return; 1386 } 1387 1388 if (!g_file_set_contents(LINUX_SYS_STATE_FILE, sysfile_str, 1389 -1, &local_gerr)) { 1390 error_setg(errp, "suspend: cannot write to '%s': %s", 1391 LINUX_SYS_STATE_FILE, local_gerr->message); 1392 return; 1393 } 1394 } 1395 1396 static void guest_suspend(SuspendMode mode, Error **errp) 1397 { 1398 Error *local_err = NULL; 1399 bool mode_supported = false; 1400 1401 if (systemd_supports_mode(mode, &local_err)) { 1402 mode_supported = true; 1403 systemd_suspend(mode, &local_err); 1404 1405 if (!local_err) { 1406 return; 1407 } 1408 } 1409 1410 error_free(local_err); 1411 local_err = NULL; 1412 1413 if (pmutils_supports_mode(mode, &local_err)) { 1414 mode_supported = true; 1415 pmutils_suspend(mode, &local_err); 1416 1417 if (!local_err) { 1418 return; 1419 } 1420 } 1421 1422 error_free(local_err); 1423 local_err = NULL; 1424 1425 if (linux_sys_state_supports_mode(mode, &local_err)) { 1426 mode_supported = true; 1427 linux_sys_state_suspend(mode, &local_err); 1428 } 1429 1430 if (!mode_supported) { 1431 error_free(local_err); 1432 error_setg(errp, 1433 "the requested suspend mode is not supported by the guest"); 1434 } else { 1435 error_propagate(errp, local_err); 1436 } 1437 } 1438 1439 void qmp_guest_suspend_disk(Error **errp) 1440 { 1441 guest_suspend(SUSPEND_MODE_DISK, errp); 1442 } 1443 1444 void qmp_guest_suspend_ram(Error **errp) 1445 { 1446 guest_suspend(SUSPEND_MODE_RAM, errp); 1447 } 1448 1449 void qmp_guest_suspend_hybrid(Error **errp) 1450 { 1451 guest_suspend(SUSPEND_MODE_HYBRID, errp); 1452 } 1453 1454 /* Transfer online/offline status between @vcpu and the guest system. 1455 * 1456 * On input either @errp or *@errp must be NULL. 1457 * 1458 * In system-to-@vcpu direction, the following @vcpu fields are accessed: 1459 * - R: vcpu->logical_id 1460 * - W: vcpu->online 1461 * - W: vcpu->can_offline 1462 * 1463 * In @vcpu-to-system direction, the following @vcpu fields are accessed: 1464 * - R: vcpu->logical_id 1465 * - R: vcpu->online 1466 * 1467 * Written members remain unmodified on error. 1468 */ 1469 static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, 1470 char *dirpath, Error **errp) 1471 { 1472 int fd; 1473 int res; 1474 int dirfd; 1475 static const char fn[] = "online"; 1476 1477 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 1478 if (dirfd == -1) { 1479 error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 1480 return; 1481 } 1482 1483 fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); 1484 if (fd == -1) { 1485 if (errno != ENOENT) { 1486 error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); 1487 } else if (sys2vcpu) { 1488 vcpu->online = true; 1489 vcpu->can_offline = false; 1490 } else if (!vcpu->online) { 1491 error_setg(errp, "logical processor #%" PRId64 " can't be " 1492 "offlined", vcpu->logical_id); 1493 } /* otherwise pretend successful re-onlining */ 1494 } else { 1495 unsigned char status; 1496 1497 res = pread(fd, &status, 1, 0); 1498 if (res == -1) { 1499 error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); 1500 } else if (res == 0) { 1501 error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, 1502 fn); 1503 } else if (sys2vcpu) { 1504 vcpu->online = (status != '0'); 1505 vcpu->can_offline = true; 1506 } else if (vcpu->online != (status != '0')) { 1507 status = '0' + vcpu->online; 1508 if (pwrite(fd, &status, 1, 0) == -1) { 1509 error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, 1510 fn); 1511 } 1512 } /* otherwise pretend successful re-(on|off)-lining */ 1513 1514 res = close(fd); 1515 g_assert(res == 0); 1516 } 1517 1518 res = close(dirfd); 1519 g_assert(res == 0); 1520 } 1521 1522 GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) 1523 { 1524 GuestLogicalProcessorList *head, **tail; 1525 const char *cpu_dir = "/sys/devices/system/cpu"; 1526 const gchar *line; 1527 g_autoptr(GDir) cpu_gdir = NULL; 1528 Error *local_err = NULL; 1529 1530 head = NULL; 1531 tail = &head; 1532 cpu_gdir = g_dir_open(cpu_dir, 0, NULL); 1533 1534 if (cpu_gdir == NULL) { 1535 error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); 1536 return NULL; 1537 } 1538 1539 while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { 1540 GuestLogicalProcessor *vcpu; 1541 int64_t id; 1542 if (sscanf(line, "cpu%" PRId64, &id)) { 1543 g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" 1544 "cpu%" PRId64 "/", id); 1545 vcpu = g_malloc0(sizeof *vcpu); 1546 vcpu->logical_id = id; 1547 vcpu->has_can_offline = true; /* lolspeak ftw */ 1548 transfer_vcpu(vcpu, true, path, &local_err); 1549 QAPI_LIST_APPEND(tail, vcpu); 1550 } 1551 } 1552 1553 if (local_err == NULL) { 1554 /* there's no guest with zero VCPUs */ 1555 g_assert(head != NULL); 1556 return head; 1557 } 1558 1559 qapi_free_GuestLogicalProcessorList(head); 1560 error_propagate(errp, local_err); 1561 return NULL; 1562 } 1563 1564 int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) 1565 { 1566 int64_t processed; 1567 Error *local_err = NULL; 1568 1569 processed = 0; 1570 while (vcpus != NULL) { 1571 char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", 1572 vcpus->value->logical_id); 1573 1574 transfer_vcpu(vcpus->value, false, path, &local_err); 1575 g_free(path); 1576 if (local_err != NULL) { 1577 break; 1578 } 1579 ++processed; 1580 vcpus = vcpus->next; 1581 } 1582 1583 if (local_err != NULL) { 1584 if (processed == 0) { 1585 error_propagate(errp, local_err); 1586 } else { 1587 error_free(local_err); 1588 } 1589 } 1590 1591 return processed; 1592 } 1593 1594 1595 static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, 1596 int size, Error **errp) 1597 { 1598 int fd; 1599 int res; 1600 1601 errno = 0; 1602 fd = openat(dirfd, pathname, O_RDONLY); 1603 if (fd == -1) { 1604 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); 1605 return; 1606 } 1607 1608 res = pread(fd, buf, size, 0); 1609 if (res == -1) { 1610 error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); 1611 } else if (res == 0) { 1612 error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); 1613 } 1614 close(fd); 1615 } 1616 1617 static void ga_write_sysfs_file(int dirfd, const char *pathname, 1618 const char *buf, int size, Error **errp) 1619 { 1620 int fd; 1621 1622 errno = 0; 1623 fd = openat(dirfd, pathname, O_WRONLY); 1624 if (fd == -1) { 1625 error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); 1626 return; 1627 } 1628 1629 if (pwrite(fd, buf, size, 0) == -1) { 1630 error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); 1631 } 1632 1633 close(fd); 1634 } 1635 1636 /* Transfer online/offline status between @mem_blk and the guest system. 1637 * 1638 * On input either @errp or *@errp must be NULL. 1639 * 1640 * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: 1641 * - R: mem_blk->phys_index 1642 * - W: mem_blk->online 1643 * - W: mem_blk->can_offline 1644 * 1645 * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: 1646 * - R: mem_blk->phys_index 1647 * - R: mem_blk->online 1648 *- R: mem_blk->can_offline 1649 * Written members remain unmodified on error. 1650 */ 1651 static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, 1652 GuestMemoryBlockResponse *result, 1653 Error **errp) 1654 { 1655 char *dirpath; 1656 int dirfd; 1657 char *status; 1658 Error *local_err = NULL; 1659 1660 if (!sys2memblk) { 1661 DIR *dp; 1662 1663 if (!result) { 1664 error_setg(errp, "Internal error, 'result' should not be NULL"); 1665 return; 1666 } 1667 errno = 0; 1668 dp = opendir("/sys/devices/system/memory/"); 1669 /* if there is no 'memory' directory in sysfs, 1670 * we think this VM does not support online/offline memory block, 1671 * any other solution? 1672 */ 1673 if (!dp) { 1674 if (errno == ENOENT) { 1675 result->response = 1676 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; 1677 } 1678 goto out1; 1679 } 1680 closedir(dp); 1681 } 1682 1683 dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", 1684 mem_blk->phys_index); 1685 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 1686 if (dirfd == -1) { 1687 if (sys2memblk) { 1688 error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 1689 } else { 1690 if (errno == ENOENT) { 1691 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; 1692 } else { 1693 result->response = 1694 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; 1695 } 1696 } 1697 g_free(dirpath); 1698 goto out1; 1699 } 1700 g_free(dirpath); 1701 1702 status = g_malloc0(10); 1703 ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); 1704 if (local_err) { 1705 /* treat with sysfs file that not exist in old kernel */ 1706 if (errno == ENOENT) { 1707 error_free(local_err); 1708 if (sys2memblk) { 1709 mem_blk->online = true; 1710 mem_blk->can_offline = false; 1711 } else if (!mem_blk->online) { 1712 result->response = 1713 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; 1714 } 1715 } else { 1716 if (sys2memblk) { 1717 error_propagate(errp, local_err); 1718 } else { 1719 error_free(local_err); 1720 result->response = 1721 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; 1722 } 1723 } 1724 goto out2; 1725 } 1726 1727 if (sys2memblk) { 1728 char removable = '0'; 1729 1730 mem_blk->online = (strncmp(status, "online", 6) == 0); 1731 1732 ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); 1733 if (local_err) { 1734 /* if no 'removable' file, it doesn't support offline mem blk */ 1735 if (errno == ENOENT) { 1736 error_free(local_err); 1737 mem_blk->can_offline = false; 1738 } else { 1739 error_propagate(errp, local_err); 1740 } 1741 } else { 1742 mem_blk->can_offline = (removable != '0'); 1743 } 1744 } else { 1745 if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { 1746 const char *new_state = mem_blk->online ? "online" : "offline"; 1747 1748 ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), 1749 &local_err); 1750 if (local_err) { 1751 error_free(local_err); 1752 result->response = 1753 GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; 1754 goto out2; 1755 } 1756 1757 result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; 1758 result->has_error_code = false; 1759 } /* otherwise pretend successful re-(on|off)-lining */ 1760 } 1761 g_free(status); 1762 close(dirfd); 1763 return; 1764 1765 out2: 1766 g_free(status); 1767 close(dirfd); 1768 out1: 1769 if (!sys2memblk) { 1770 result->has_error_code = true; 1771 result->error_code = errno; 1772 } 1773 } 1774 1775 GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) 1776 { 1777 GuestMemoryBlockList *head, **tail; 1778 Error *local_err = NULL; 1779 struct dirent *de; 1780 DIR *dp; 1781 1782 head = NULL; 1783 tail = &head; 1784 1785 dp = opendir("/sys/devices/system/memory/"); 1786 if (!dp) { 1787 /* it's ok if this happens to be a system that doesn't expose 1788 * memory blocks via sysfs, but otherwise we should report 1789 * an error 1790 */ 1791 if (errno != ENOENT) { 1792 error_setg_errno(errp, errno, "Can't open directory" 1793 "\"/sys/devices/system/memory/\""); 1794 } 1795 return NULL; 1796 } 1797 1798 /* Note: the phys_index of memory block may be discontinuous, 1799 * this is because a memblk is the unit of the Sparse Memory design, which 1800 * allows discontinuous memory ranges (ex. NUMA), so here we should 1801 * traverse the memory block directory. 1802 */ 1803 while ((de = readdir(dp)) != NULL) { 1804 GuestMemoryBlock *mem_blk; 1805 1806 if ((strncmp(de->d_name, "memory", 6) != 0) || 1807 !(de->d_type & DT_DIR)) { 1808 continue; 1809 } 1810 1811 mem_blk = g_malloc0(sizeof *mem_blk); 1812 /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ 1813 mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); 1814 mem_blk->has_can_offline = true; /* lolspeak ftw */ 1815 transfer_memory_block(mem_blk, true, NULL, &local_err); 1816 if (local_err) { 1817 break; 1818 } 1819 1820 QAPI_LIST_APPEND(tail, mem_blk); 1821 } 1822 1823 closedir(dp); 1824 if (local_err == NULL) { 1825 /* there's no guest with zero memory blocks */ 1826 if (head == NULL) { 1827 error_setg(errp, "guest reported zero memory blocks!"); 1828 } 1829 return head; 1830 } 1831 1832 qapi_free_GuestMemoryBlockList(head); 1833 error_propagate(errp, local_err); 1834 return NULL; 1835 } 1836 1837 GuestMemoryBlockResponseList * 1838 qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) 1839 { 1840 GuestMemoryBlockResponseList *head, **tail; 1841 Error *local_err = NULL; 1842 1843 head = NULL; 1844 tail = &head; 1845 1846 while (mem_blks != NULL) { 1847 GuestMemoryBlockResponse *result; 1848 GuestMemoryBlock *current_mem_blk = mem_blks->value; 1849 1850 result = g_malloc0(sizeof(*result)); 1851 result->phys_index = current_mem_blk->phys_index; 1852 transfer_memory_block(current_mem_blk, false, result, &local_err); 1853 if (local_err) { /* should never happen */ 1854 goto err; 1855 } 1856 1857 QAPI_LIST_APPEND(tail, result); 1858 mem_blks = mem_blks->next; 1859 } 1860 1861 return head; 1862 err: 1863 qapi_free_GuestMemoryBlockResponseList(head); 1864 error_propagate(errp, local_err); 1865 return NULL; 1866 } 1867 1868 GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) 1869 { 1870 Error *local_err = NULL; 1871 char *dirpath; 1872 int dirfd; 1873 char *buf; 1874 GuestMemoryBlockInfo *info; 1875 1876 dirpath = g_strdup_printf("/sys/devices/system/memory/"); 1877 dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); 1878 if (dirfd == -1) { 1879 error_setg_errno(errp, errno, "open(\"%s\")", dirpath); 1880 g_free(dirpath); 1881 return NULL; 1882 } 1883 g_free(dirpath); 1884 1885 buf = g_malloc0(20); 1886 ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); 1887 close(dirfd); 1888 if (local_err) { 1889 g_free(buf); 1890 error_propagate(errp, local_err); 1891 return NULL; 1892 } 1893 1894 info = g_new0(GuestMemoryBlockInfo, 1); 1895 info->size = strtol(buf, NULL, 16); /* the unit is bytes */ 1896 1897 g_free(buf); 1898 1899 return info; 1900 } 1901 1902 #define MAX_NAME_LEN 128 1903 static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) 1904 { 1905 GuestDiskStatsInfoList *head = NULL, **tail = &head; 1906 const char *diskstats = "/proc/diskstats"; 1907 FILE *fp; 1908 size_t n; 1909 char *line = NULL; 1910 1911 fp = fopen(diskstats, "r"); 1912 if (fp == NULL) { 1913 error_setg_errno(errp, errno, "open(\"%s\")", diskstats); 1914 return NULL; 1915 } 1916 1917 while (getline(&line, &n, fp) != -1) { 1918 g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; 1919 g_autofree GuestDiskStats *diskstat = NULL; 1920 char dev_name[MAX_NAME_LEN]; 1921 unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; 1922 unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; 1923 unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; 1924 unsigned long dc_ios, dc_merges, dc_sec, fl_ios; 1925 unsigned int major, minor; 1926 int i; 1927 1928 i = sscanf(line, "%u %u %s %lu %lu %lu" 1929 "%lu %lu %lu %lu %u %u %u %u" 1930 "%lu %lu %lu %u %lu %u", 1931 &major, &minor, dev_name, 1932 &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, 1933 &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, 1934 &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, 1935 &dc_ios, &dc_merges, &dc_sec, &dc_ticks, 1936 &fl_ios, &fl_ticks); 1937 1938 if (i < 7) { 1939 continue; 1940 } 1941 1942 diskstatinfo = g_new0(GuestDiskStatsInfo, 1); 1943 diskstatinfo->name = g_strdup(dev_name); 1944 diskstatinfo->major = major; 1945 diskstatinfo->minor = minor; 1946 1947 diskstat = g_new0(GuestDiskStats, 1); 1948 if (i == 7) { 1949 diskstat->has_read_ios = true; 1950 diskstat->read_ios = rd_ios; 1951 diskstat->has_read_sectors = true; 1952 diskstat->read_sectors = rd_merges_or_rd_sec; 1953 diskstat->has_write_ios = true; 1954 diskstat->write_ios = rd_sec_or_wr_ios; 1955 diskstat->has_write_sectors = true; 1956 diskstat->write_sectors = rd_ticks_or_wr_sec; 1957 } 1958 if (i >= 14) { 1959 diskstat->has_read_ios = true; 1960 diskstat->read_ios = rd_ios; 1961 diskstat->has_read_sectors = true; 1962 diskstat->read_sectors = rd_sec_or_wr_ios; 1963 diskstat->has_read_merges = true; 1964 diskstat->read_merges = rd_merges_or_rd_sec; 1965 diskstat->has_read_ticks = true; 1966 diskstat->read_ticks = rd_ticks_or_wr_sec; 1967 diskstat->has_write_ios = true; 1968 diskstat->write_ios = wr_ios; 1969 diskstat->has_write_sectors = true; 1970 diskstat->write_sectors = wr_sec; 1971 diskstat->has_write_merges = true; 1972 diskstat->write_merges = wr_merges; 1973 diskstat->has_write_ticks = true; 1974 diskstat->write_ticks = wr_ticks; 1975 diskstat->has_ios_pgr = true; 1976 diskstat->ios_pgr = ios_pgr; 1977 diskstat->has_total_ticks = true; 1978 diskstat->total_ticks = tot_ticks; 1979 diskstat->has_weight_ticks = true; 1980 diskstat->weight_ticks = rq_ticks; 1981 } 1982 if (i >= 18) { 1983 diskstat->has_discard_ios = true; 1984 diskstat->discard_ios = dc_ios; 1985 diskstat->has_discard_merges = true; 1986 diskstat->discard_merges = dc_merges; 1987 diskstat->has_discard_sectors = true; 1988 diskstat->discard_sectors = dc_sec; 1989 diskstat->has_discard_ticks = true; 1990 diskstat->discard_ticks = dc_ticks; 1991 } 1992 if (i >= 20) { 1993 diskstat->has_flush_ios = true; 1994 diskstat->flush_ios = fl_ios; 1995 diskstat->has_flush_ticks = true; 1996 diskstat->flush_ticks = fl_ticks; 1997 } 1998 1999 diskstatinfo->stats = g_steal_pointer(&diskstat); 2000 QAPI_LIST_APPEND(tail, diskstatinfo); 2001 diskstatinfo = NULL; 2002 } 2003 free(line); 2004 fclose(fp); 2005 return head; 2006 } 2007 2008 GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) 2009 { 2010 return guest_get_diskstats(errp); 2011 } 2012 2013 GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) 2014 { 2015 GuestCpuStatsList *head = NULL, **tail = &head; 2016 const char *cpustats = "/proc/stat"; 2017 int clk_tck = sysconf(_SC_CLK_TCK); 2018 FILE *fp; 2019 size_t n; 2020 char *line = NULL; 2021 2022 fp = fopen(cpustats, "r"); 2023 if (fp == NULL) { 2024 error_setg_errno(errp, errno, "open(\"%s\")", cpustats); 2025 return NULL; 2026 } 2027 2028 while (getline(&line, &n, fp) != -1) { 2029 GuestCpuStats *cpustat = NULL; 2030 GuestLinuxCpuStats *linuxcpustat; 2031 int i; 2032 unsigned long user, system, idle, iowait, irq, softirq, steal, guest; 2033 unsigned long nice, guest_nice; 2034 char name[64]; 2035 2036 i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", 2037 name, &user, &nice, &system, &idle, &iowait, &irq, &softirq, 2038 &steal, &guest, &guest_nice); 2039 2040 /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */ 2041 if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) { 2042 continue; 2043 } 2044 2045 if (i < 5) { 2046 slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats); 2047 break; 2048 } 2049 2050 cpustat = g_new0(GuestCpuStats, 1); 2051 cpustat->type = GUEST_CPU_STATS_TYPE_LINUX; 2052 2053 linuxcpustat = &cpustat->u.q_linux; 2054 linuxcpustat->cpu = atoi(&name[3]); 2055 linuxcpustat->user = user * 1000 / clk_tck; 2056 linuxcpustat->nice = nice * 1000 / clk_tck; 2057 linuxcpustat->system = system * 1000 / clk_tck; 2058 linuxcpustat->idle = idle * 1000 / clk_tck; 2059 2060 if (i > 5) { 2061 linuxcpustat->has_iowait = true; 2062 linuxcpustat->iowait = iowait * 1000 / clk_tck; 2063 } 2064 2065 if (i > 6) { 2066 linuxcpustat->has_irq = true; 2067 linuxcpustat->irq = irq * 1000 / clk_tck; 2068 linuxcpustat->has_softirq = true; 2069 linuxcpustat->softirq = softirq * 1000 / clk_tck; 2070 } 2071 2072 if (i > 8) { 2073 linuxcpustat->has_steal = true; 2074 linuxcpustat->steal = steal * 1000 / clk_tck; 2075 } 2076 2077 if (i > 9) { 2078 linuxcpustat->has_guest = true; 2079 linuxcpustat->guest = guest * 1000 / clk_tck; 2080 } 2081 2082 if (i > 10) { 2083 linuxcpustat->has_guest = true; 2084 linuxcpustat->guest = guest * 1000 / clk_tck; 2085 linuxcpustat->has_guestnice = true; 2086 linuxcpustat->guestnice = guest_nice * 1000 / clk_tck; 2087 } 2088 2089 QAPI_LIST_APPEND(tail, cpustat); 2090 } 2091 2092 free(line); 2093 fclose(fp); 2094 return head; 2095 } 2096 2097 static char *hexToIPAddress(const void *hexValue, int is_ipv6) 2098 { 2099 if (is_ipv6) { 2100 char addr[INET6_ADDRSTRLEN]; 2101 struct in6_addr in6; 2102 const char *hexStr = (const char *)hexValue; 2103 int i; 2104 2105 for (i = 0; i < 16; i++) { 2106 sscanf(&hexStr[i * 2], "%02hhx", &in6.s6_addr[i]); 2107 } 2108 inet_ntop(AF_INET6, &in6, addr, INET6_ADDRSTRLEN); 2109 2110 return g_strdup(addr); 2111 } else { 2112 unsigned int hexInt = *(unsigned int *)hexValue; 2113 unsigned int byte1 = (hexInt >> 24) & 0xFF; 2114 unsigned int byte2 = (hexInt >> 16) & 0xFF; 2115 unsigned int byte3 = (hexInt >> 8) & 0xFF; 2116 unsigned int byte4 = hexInt & 0xFF; 2117 2118 return g_strdup_printf("%u.%u.%u.%u", byte4, byte3, byte2, byte1); 2119 } 2120 } 2121 2122 GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) 2123 { 2124 GuestNetworkRouteList *head = NULL, **tail = &head; 2125 const char *routeFiles[] = {"/proc/net/route", "/proc/net/ipv6_route"}; 2126 FILE *fp; 2127 size_t n; 2128 char *line = NULL; 2129 int firstLine; 2130 int is_ipv6; 2131 int i; 2132 2133 for (i = 0; i < 2; i++) { 2134 firstLine = 1; 2135 is_ipv6 = (i == 1); 2136 fp = fopen(routeFiles[i], "r"); 2137 if (fp == NULL) { 2138 error_setg_errno(errp, errno, "open(\"%s\")", routeFiles[i]); 2139 free(line); 2140 continue; 2141 } 2142 2143 while (getline(&line, &n, fp) != -1) { 2144 if (firstLine && !is_ipv6) { 2145 firstLine = 0; 2146 continue; 2147 } 2148 GuestNetworkRoute *route = NULL; 2149 GuestNetworkRoute *networkroute; 2150 char Iface[IFNAMSIZ]; 2151 if (is_ipv6) { 2152 char Destination[33], Source[33], NextHop[33]; 2153 int DesPrefixlen, SrcPrefixlen, Metric, RefCnt, Use, Flags; 2154 2155 /* Parse the line and extract the values */ 2156 if (sscanf(line, "%32s %x %32s %x %32s %x %x %x %x %s", 2157 Destination, &DesPrefixlen, Source, 2158 &SrcPrefixlen, NextHop, &Metric, &RefCnt, 2159 &Use, &Flags, Iface) != 10) { 2160 continue; 2161 } 2162 2163 route = g_new0(GuestNetworkRoute, 1); 2164 networkroute = route; 2165 networkroute->iface = g_strdup(Iface); 2166 networkroute->destination = hexToIPAddress(Destination, 1); 2167 networkroute->metric = Metric; 2168 networkroute->source = hexToIPAddress(Source, 1); 2169 networkroute->desprefixlen = g_strdup_printf( 2170 "%d", DesPrefixlen 2171 ); 2172 networkroute->srcprefixlen = g_strdup_printf( 2173 "%d", SrcPrefixlen 2174 ); 2175 networkroute->nexthop = hexToIPAddress(NextHop, 1); 2176 networkroute->has_flags = true; 2177 networkroute->flags = Flags; 2178 networkroute->has_refcnt = true; 2179 networkroute->refcnt = RefCnt; 2180 networkroute->has_use = true; 2181 networkroute->use = Use; 2182 networkroute->version = 6; 2183 } else { 2184 unsigned int Destination, Gateway, Mask, Flags; 2185 int RefCnt, Use, Metric, MTU, Window, IRTT; 2186 2187 /* Parse the line and extract the values */ 2188 if (sscanf(line, "%s %X %X %x %d %d %d %X %d %d %d", 2189 Iface, &Destination, &Gateway, &Flags, &RefCnt, 2190 &Use, &Metric, &Mask, &MTU, &Window, &IRTT) != 11) { 2191 continue; 2192 } 2193 2194 route = g_new0(GuestNetworkRoute, 1); 2195 networkroute = route; 2196 networkroute->iface = g_strdup(Iface); 2197 networkroute->destination = hexToIPAddress(&Destination, 0); 2198 networkroute->gateway = hexToIPAddress(&Gateway, 0); 2199 networkroute->mask = hexToIPAddress(&Mask, 0); 2200 networkroute->metric = Metric; 2201 networkroute->has_flags = true; 2202 networkroute->flags = Flags; 2203 networkroute->has_refcnt = true; 2204 networkroute->refcnt = RefCnt; 2205 networkroute->has_use = true; 2206 networkroute->use = Use; 2207 networkroute->has_mtu = true; 2208 networkroute->mtu = MTU; 2209 networkroute->has_window = true; 2210 networkroute->window = Window; 2211 networkroute->has_irtt = true; 2212 networkroute->irtt = IRTT; 2213 networkroute->version = 4; 2214 } 2215 2216 QAPI_LIST_APPEND(tail, route); 2217 } 2218 2219 free(line); 2220 fclose(fp); 2221 } 2222 2223 return head; 2224 } 2225