/* * QEMU Guest Agent Linux-specific command implementations * * Copyright IBM Corp. 2011 * * Authors: * Michael Roth * Michal Privoznik * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qga-qapi-commands.h" #include "qapi/error.h" #include "commands-common.h" #include "cutils.h" #include #include #include #include #include "block/nvme.h" #ifdef CONFIG_LIBUDEV #include #endif #ifdef HAVE_GETIFADDRS #include #endif #include #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) static int dev_major_minor(const char *devpath, unsigned int *devmajor, unsigned int *devminor) { struct stat st; *devmajor = 0; *devminor = 0; if (stat(devpath, &st) < 0) { slog("failed to stat device file '%s': %s", devpath, strerror(errno)); return -1; } if (S_ISDIR(st.st_mode)) { /* It is bind mount */ return -2; } if (S_ISBLK(st.st_mode)) { *devmajor = major(st.st_rdev); *devminor = minor(st.st_rdev); return 0; } return -1; } static bool build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) { struct mntent *ment; FsMount *mount; char const *mtab = "/proc/self/mounts"; FILE *fp; unsigned int devmajor, devminor; fp = setmntent(mtab, "r"); if (!fp) { error_setg(errp, "failed to open mtab file: '%s'", mtab); return false; } while ((ment = getmntent(fp))) { /* * An entry which device name doesn't start with a '/' is * either a dummy file system or a network file system. * Add special handling for smbfs and cifs as is done by * coreutils as well. */ if ((ment->mnt_fsname[0] != '/') || (strcmp(ment->mnt_type, "smbfs") == 0) || (strcmp(ment->mnt_type, "cifs") == 0)) { continue; } if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { /* Skip bind mounts */ continue; } mount = g_new0(FsMount, 1); mount->dirname = g_strdup(ment->mnt_dir); mount->devtype = g_strdup(ment->mnt_type); mount->devmajor = devmajor; mount->devminor = devminor; QTAILQ_INSERT_TAIL(mounts, mount, next); } endmntent(fp); return true; } static void decode_mntname(char *name, int len) { int i, j = 0; for (i = 0; i <= len; i++) { if (name[i] != '\\') { name[j++] = name[i]; } else if (name[i + 1] == '\\') { name[j++] = '\\'; i++; } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && name[i + 2] >= '0' && name[i + 2] <= '7' && name[i + 3] >= '0' && name[i + 3] <= '7') { name[j++] = (name[i + 1] - '0') * 64 + (name[i + 2] - '0') * 8 + (name[i + 3] - '0'); i += 3; } else { name[j++] = name[i]; } } } /* * Walk the mount table and build a list of local file systems */ bool build_fs_mount_list(FsMountList *mounts, Error **errp) { FsMount *mount; char const *mountinfo = "/proc/self/mountinfo"; FILE *fp; char *line = NULL, *dash; size_t n; char check; unsigned int devmajor, devminor; int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; fp = fopen(mountinfo, "r"); if (!fp) { return build_fs_mount_list_from_mtab(mounts, errp); } while (getline(&line, &n, fp) != -1) { ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", &devmajor, &devminor, &dir_s, &dir_e, &check); if (ret < 3) { continue; } dash = strstr(line + dir_e, " - "); if (!dash) { continue; } ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", &type_s, &type_e, &dev_s, &dev_e, &check); if (ret < 1) { continue; } line[dir_e] = 0; dash[type_e] = 0; dash[dev_e] = 0; decode_mntname(line + dir_s, dir_e - dir_s); decode_mntname(dash + dev_s, dev_e - dev_s); if (devmajor == 0) { /* btrfs reports major number = 0 */ if (strcmp("btrfs", dash + type_s) != 0 || dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { continue; } } mount = g_new0(FsMount, 1); mount->dirname = g_strdup(line + dir_s); mount->devtype = g_strdup(dash + type_s); mount->devmajor = devmajor; mount->devminor = devminor; QTAILQ_INSERT_TAIL(mounts, mount, next); } free(line); fclose(fp); return true; } #endif /* CONFIG_FSFREEZE || CONFIG_FSTRIM */ #ifdef CONFIG_FSFREEZE /* * Walk list of mounted file systems in the guest, and freeze the ones which * are real local file systems. */ int64_t qmp_guest_fsfreeze_do_freeze_list(bool has_mountpoints, strList *mountpoints, FsMountList mounts, Error **errp) { struct FsMount *mount; strList *list; int fd, ret, i = 0; QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { /* To issue fsfreeze in the reverse order of mounts, check if the * mount is listed in the list here */ if (has_mountpoints) { for (list = mountpoints; list; list = list->next) { if (strcmp(list->value, mount->dirname) == 0) { break; } } if (!list) { continue; } } fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); if (fd == -1) { error_setg_errno(errp, errno, "failed to open %s", mount->dirname); return -1; } /* we try to cull filesystems we know won't work in advance, but other * filesystems may not implement fsfreeze for less obvious reasons. * these will report EOPNOTSUPP. we simply ignore these when tallying * the number of frozen filesystems. * if a filesystem is mounted more than once (aka bind mount) a * consecutive attempt to freeze an already frozen filesystem will * return EBUSY. * * any other error means a failure to freeze a filesystem we * expect to be freezable, so return an error in those cases * and return system to thawed state. */ ret = ioctl(fd, FIFREEZE); if (ret == -1) { if (errno != EOPNOTSUPP && errno != EBUSY) { error_setg_errno(errp, errno, "failed to freeze %s", mount->dirname); close(fd); return -1; } } else { i++; } close(fd); } return i; } int qmp_guest_fsfreeze_do_thaw(Error **errp) { int ret; FsMountList mounts; FsMount *mount; int fd, i = 0, logged; Error *local_err = NULL; QTAILQ_INIT(&mounts); if (!build_fs_mount_list(&mounts, &local_err)) { error_propagate(errp, local_err); return -1; } QTAILQ_FOREACH(mount, &mounts, next) { logged = false; fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); if (fd == -1) { continue; } /* we have no way of knowing whether a filesystem was actually unfrozen * as a result of a successful call to FITHAW, only that if an error * was returned the filesystem was *not* unfrozen by that particular * call. * * since multiple preceding FIFREEZEs require multiple calls to FITHAW * to unfreeze, continuing issuing FITHAW until an error is returned, * in which case either the filesystem is in an unfreezable state, or, * more likely, it was thawed previously (and remains so afterward). * * also, since the most recent successful call is the one that did * the actual unfreeze, we can use this to provide an accurate count * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which * may * be useful for determining whether a filesystem was unfrozen * during the freeze/thaw phase by a process other than qemu-ga. */ do { ret = ioctl(fd, FITHAW); if (ret == 0 && !logged) { i++; logged = true; } } while (ret == 0); close(fd); } free_fs_mount_list(&mounts); return i; } #endif /* CONFIG_FSFREEZE */ #if defined(CONFIG_FSFREEZE) static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) { char *path; char *dpath; char *driver = NULL; char buf[PATH_MAX]; ssize_t len; path = g_strndup(syspath, pathlen); dpath = g_strdup_printf("%s/driver", path); len = readlink(dpath, buf, sizeof(buf) - 1); if (len != -1) { buf[len] = 0; driver = g_path_get_basename(buf); } g_free(dpath); g_free(path); return driver; } static int compare_uint(const void *_a, const void *_b) { unsigned int a = *(unsigned int *)_a; unsigned int b = *(unsigned int *)_b; return a < b ? -1 : a > b ? 1 : 0; } /* Walk the specified sysfs and build a sorted list of host or ata numbers */ static int build_hosts(char const *syspath, char const *host, bool ata, unsigned int *hosts, int hosts_max, Error **errp) { char *path; DIR *dir; struct dirent *entry; int i = 0; path = g_strndup(syspath, host - syspath); dir = opendir(path); if (!dir) { error_setg_errno(errp, errno, "opendir(\"%s\")", path); g_free(path); return -1; } while (i < hosts_max) { entry = readdir(dir); if (!entry) { break; } if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { ++i; } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { ++i; } } qsort(hosts, i, sizeof(hosts[0]), compare_uint); g_free(path); closedir(dir); return i; } /* * Store disk device info for devices on the PCI bus. * Returns true if information has been stored, or false for failure. */ static bool build_guest_fsinfo_for_pci_dev(char const *syspath, GuestDiskAddress *disk, Error **errp) { unsigned int pci[4], host, hosts[8], tgt[3]; int i, nhosts = 0, pcilen; GuestPCIAddress *pciaddr = disk->pci_controller; bool has_ata = false, has_host = false, has_tgt = false; char *p, *q, *driver = NULL; bool ret = false; p = strstr(syspath, "/devices/pci"); if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { g_debug("only pci device is supported: sysfs path '%s'", syspath); return false; } p += 12 + pcilen; while (true) { driver = get_pci_driver(syspath, p - syspath, errp); if (driver && (g_str_equal(driver, "ata_piix") || g_str_equal(driver, "sym53c8xx") || g_str_equal(driver, "virtio-pci") || g_str_equal(driver, "ahci") || g_str_equal(driver, "nvme") || g_str_equal(driver, "xhci_hcd") || g_str_equal(driver, "ehci-pci"))) { break; } g_free(driver); if (sscanf(p, "/%x:%x:%x.%x%n", pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { p += pcilen; continue; } g_debug("unsupported driver or sysfs path '%s'", syspath); return false; } p = strstr(syspath, "/target"); if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", tgt, tgt + 1, tgt + 2) == 3) { has_tgt = true; } p = strstr(syspath, "/ata"); if (p) { q = p + 4; has_ata = true; } else { p = strstr(syspath, "/host"); q = p + 5; } if (p && sscanf(q, "%u", &host) == 1) { has_host = true; nhosts = build_hosts(syspath, p, has_ata, hosts, ARRAY_SIZE(hosts), errp); if (nhosts < 0) { goto cleanup; } } pciaddr->domain = pci[0]; pciaddr->bus = pci[1]; pciaddr->slot = pci[2]; pciaddr->function = pci[3]; if (strcmp(driver, "ata_piix") == 0) { /* a host per ide bus, target*:0::0 */ if (!has_host || !has_tgt) { g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); goto cleanup; } for (i = 0; i < nhosts; i++) { if (host == hosts[i]) { disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; disk->bus = i; disk->unit = tgt[1]; break; } } if (i >= nhosts) { g_debug("no host for '%s' (driver '%s')", syspath, driver); goto cleanup; } } else if (strcmp(driver, "sym53c8xx") == 0) { /* scsi(LSI Logic): target*:0::0 */ if (!has_tgt) { g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); goto cleanup; } disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; disk->unit = tgt[1]; } else if (strcmp(driver, "virtio-pci") == 0) { if (has_tgt) { /* virtio-scsi: target*:0:0: */ disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; disk->unit = tgt[2]; } else { /* virtio-blk: 1 disk per 1 device */ disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; } } else if (strcmp(driver, "ahci") == 0) { /* ahci: 1 host per 1 unit */ if (!has_host || !has_tgt) { g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); goto cleanup; } for (i = 0; i < nhosts; i++) { if (host == hosts[i]) { disk->unit = i; disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; break; } } if (i >= nhosts) { g_debug("no host for '%s' (driver '%s')", syspath, driver); goto cleanup; } } else if (strcmp(driver, "nvme") == 0) { disk->bus_type = GUEST_DISK_BUS_TYPE_NVME; } else if (strcmp(driver, "ehci-pci") == 0 || strcmp(driver, "xhci_hcd") == 0) { disk->bus_type = GUEST_DISK_BUS_TYPE_USB; } else { g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); goto cleanup; } ret = true; cleanup: g_free(driver); return ret; } /* * Store disk device info for non-PCI virtio devices (for example s390x * channel I/O devices). Returns true if information has been stored, or * false for failure. */ static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, GuestDiskAddress *disk, Error **errp) { unsigned int tgt[3]; char *p; if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { g_debug("Unsupported virtio device '%s'", syspath); return false; } p = strstr(syspath, "/target"); if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", &tgt[0], &tgt[1], &tgt[2]) == 3) { /* virtio-scsi: target*:0:: */ disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; disk->bus = tgt[0]; disk->target = tgt[1]; disk->unit = tgt[2]; } else { /* virtio-blk: 1 disk per 1 device */ disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; } return true; } /* * Store disk device info for CCW devices (s390x channel I/O devices). * Returns true if information has been stored, or false for failure. */ static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, GuestDiskAddress *disk, Error **errp) { unsigned int cssid, ssid, subchno, devno; char *p; p = strstr(syspath, "/devices/css"); if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", &cssid, &ssid, &subchno, &devno) < 4) { g_debug("could not parse ccw device sysfs path: %s", syspath); return false; } disk->ccw_address = g_new0(GuestCCWAddress, 1); disk->ccw_address->cssid = cssid; disk->ccw_address->ssid = ssid; disk->ccw_address->subchno = subchno; disk->ccw_address->devno = devno; if (strstr(p, "/virtio")) { build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); } return true; } /* Store disk device info specified by @sysfs into @fs */ static void build_guest_fsinfo_for_real_device(char const *syspath, GuestFilesystemInfo *fs, Error **errp) { GuestDiskAddress *disk; GuestPCIAddress *pciaddr; bool has_hwinf; #ifdef CONFIG_LIBUDEV struct udev *udev = NULL; struct udev_device *udevice = NULL; #endif pciaddr = g_new0(GuestPCIAddress, 1); pciaddr->domain = -1; /* -1 means field is invalid */ pciaddr->bus = -1; pciaddr->slot = -1; pciaddr->function = -1; disk = g_new0(GuestDiskAddress, 1); disk->pci_controller = pciaddr; disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; #ifdef CONFIG_LIBUDEV udev = udev_new(); udevice = udev_device_new_from_syspath(udev, syspath); if (udev == NULL || udevice == NULL) { g_debug("failed to query udev"); } else { const char *devnode, *serial; devnode = udev_device_get_devnode(udevice); if (devnode != NULL) { disk->dev = g_strdup(devnode); } serial = udev_device_get_property_value(udevice, "ID_SERIAL"); if (serial != NULL && *serial != 0) { disk->serial = g_strdup(serial); } } udev_unref(udev); udev_device_unref(udevice); #endif if (strstr(syspath, "/devices/pci")) { has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); } else if (strstr(syspath, "/devices/css")) { has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); } else if (strstr(syspath, "/virtio")) { has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); } else { g_debug("Unsupported device type for '%s'", syspath); has_hwinf = false; } if (has_hwinf || disk->dev || disk->serial) { QAPI_LIST_PREPEND(fs->disk, disk); } else { qapi_free_GuestDiskAddress(disk); } } static void build_guest_fsinfo_for_device(char const *devpath, GuestFilesystemInfo *fs, Error **errp); /* Store a list of slave devices of virtual volume specified by @syspath into * @fs */ static void build_guest_fsinfo_for_virtual_device(char const *syspath, GuestFilesystemInfo *fs, Error **errp) { Error *err = NULL; DIR *dir; char *dirpath; struct dirent *entry; dirpath = g_strdup_printf("%s/slaves", syspath); dir = opendir(dirpath); if (!dir) { if (errno != ENOENT) { error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); } g_free(dirpath); return; } for (;;) { errno = 0; entry = readdir(dir); if (entry == NULL) { if (errno) { error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); } break; } if (entry->d_type == DT_LNK) { char *path; g_debug(" slave device '%s'", entry->d_name); path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); build_guest_fsinfo_for_device(path, fs, &err); g_free(path); if (err) { error_propagate(errp, err); break; } } } g_free(dirpath); closedir(dir); } static bool is_disk_virtual(const char *devpath, Error **errp) { g_autofree char *syspath = realpath(devpath, NULL); if (!syspath) { error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); return false; } return strstr(syspath, "/devices/virtual/block/") != NULL; } /* Dispatch to functions for virtual/real device */ static void build_guest_fsinfo_for_device(char const *devpath, GuestFilesystemInfo *fs, Error **errp) { ERRP_GUARD(); g_autofree char *syspath = NULL; bool is_virtual = false; syspath = realpath(devpath, NULL); if (!syspath) { if (errno != ENOENT) { error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); return; } /* ENOENT: This devpath may not exist because of container config */ if (!fs->name) { fs->name = g_path_get_basename(devpath); } return; } if (!fs->name) { fs->name = g_path_get_basename(syspath); } g_debug(" parse sysfs path '%s'", syspath); is_virtual = is_disk_virtual(syspath, errp); if (*errp != NULL) { return; } if (is_virtual) { build_guest_fsinfo_for_virtual_device(syspath, fs, errp); } else { build_guest_fsinfo_for_real_device(syspath, fs, errp); } } #ifdef CONFIG_LIBUDEV /* * Wrapper around build_guest_fsinfo_for_device() for getting just * the disk address. */ static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) { g_autoptr(GuestFilesystemInfo) fs = NULL; fs = g_new0(GuestFilesystemInfo, 1); build_guest_fsinfo_for_device(syspath, fs, errp); if (fs->disk != NULL) { return g_steal_pointer(&fs->disk->value); } return NULL; } static char *get_alias_for_syspath(const char *syspath) { struct udev *udev = NULL; struct udev_device *udevice = NULL; char *ret = NULL; udev = udev_new(); if (udev == NULL) { g_debug("failed to query udev"); goto out; } udevice = udev_device_new_from_syspath(udev, syspath); if (udevice == NULL) { g_debug("failed to query udev for path: %s", syspath); goto out; } else { const char *alias = udev_device_get_property_value( udevice, "DM_NAME"); /* * NULL means there was an error and empty string means there is no * alias. In case of no alias we return NULL instead of empty string. */ if (alias == NULL) { g_debug("failed to query udev for device alias for: %s", syspath); } else if (*alias != 0) { ret = g_strdup(alias); } } out: udev_unref(udev); udev_device_unref(udevice); return ret; } static char *get_device_for_syspath(const char *syspath) { struct udev *udev = NULL; struct udev_device *udevice = NULL; char *ret = NULL; udev = udev_new(); if (udev == NULL) { g_debug("failed to query udev"); goto out; } udevice = udev_device_new_from_syspath(udev, syspath); if (udevice == NULL) { g_debug("failed to query udev for path: %s", syspath); goto out; } else { ret = g_strdup(udev_device_get_devnode(udevice)); } out: udev_unref(udev); udev_device_unref(udevice); return ret; } static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) { g_autofree char *deps_dir = NULL; const gchar *dep; GDir *dp_deps = NULL; /* List dependent disks */ deps_dir = g_strdup_printf("%s/slaves", disk_dir); g_debug(" listing entries in: %s", deps_dir); dp_deps = g_dir_open(deps_dir, 0, NULL); if (dp_deps == NULL) { g_debug("failed to list entries in %s", deps_dir); return; } disk->has_dependencies = true; while ((dep = g_dir_read_name(dp_deps)) != NULL) { g_autofree char *dep_dir = NULL; char *dev_name; /* Add dependent disks */ dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); dev_name = get_device_for_syspath(dep_dir); if (dev_name != NULL) { g_debug(" adding dependent device: %s", dev_name); QAPI_LIST_PREPEND(disk->dependencies, dev_name); } } g_dir_close(dp_deps); } /* * Detect partitions subdirectory, name is "" or * "p" * * @disk_name -- last component of /sys path (e.g. sda) * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) * @disk_dev -- device node of the disk (e.g. /dev/sda) */ static GuestDiskInfoList *get_disk_partitions( GuestDiskInfoList *list, const char *disk_name, const char *disk_dir, const char *disk_dev) { GuestDiskInfoList *ret = list; struct dirent *de_disk; DIR *dp_disk = NULL; size_t len = strlen(disk_name); dp_disk = opendir(disk_dir); while ((de_disk = readdir(dp_disk)) != NULL) { g_autofree char *partition_dir = NULL; char *dev_name; GuestDiskInfo *partition; if (!(de_disk->d_type & DT_DIR)) { continue; } if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && ((*(de_disk->d_name + len) == 'p' && isdigit(*(de_disk->d_name + len + 1))) || isdigit(*(de_disk->d_name + len))))) { continue; } partition_dir = g_strdup_printf("%s/%s", disk_dir, de_disk->d_name); dev_name = get_device_for_syspath(partition_dir); if (dev_name == NULL) { g_debug("Failed to get device name for syspath: %s", disk_dir); continue; } partition = g_new0(GuestDiskInfo, 1); partition->name = dev_name; partition->partition = true; partition->has_dependencies = true; /* Add parent disk as dependent for easier tracking of hierarchy */ QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); QAPI_LIST_PREPEND(ret, partition); } closedir(dp_disk); return ret; } static void get_nvme_smart(GuestDiskInfo *disk) { int fd; GuestNVMeSmart *smart; NvmeSmartLog log = {0}; struct nvme_admin_cmd cmd = { .opcode = NVME_ADM_CMD_GET_LOG_PAGE, .nsid = NVME_NSID_BROADCAST, .addr = (uintptr_t)&log, .data_len = sizeof(log), .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */ | (((sizeof(log) >> 2) - 1) << 16) }; fd = qga_open_cloexec(disk->name, O_RDONLY, 0); if (fd == -1) { g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno)); return; } if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) { g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno)); close(fd); return; } disk->smart = g_new0(GuestDiskSmart, 1); disk->smart->type = GUEST_DISK_BUS_TYPE_NVME; smart = &disk->smart->u.nvme; smart->critical_warning = log.critical_warning; smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */ smart->available_spare = log.available_spare; smart->available_spare_threshold = log.available_spare_threshold; smart->percentage_used = log.percentage_used; smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]); smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]); smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]); smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]); smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]); smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]); smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]); smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]); smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]); smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]); smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]); smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]); smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]); smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]); smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]); smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]); smart->media_errors_lo = le64_to_cpu(log.media_errors[0]); smart->media_errors_hi = le64_to_cpu(log.media_errors[1]); smart->number_of_error_log_entries_lo = le64_to_cpu(log.number_of_error_log_entries[0]); smart->number_of_error_log_entries_hi = le64_to_cpu(log.number_of_error_log_entries[1]); close(fd); } static void get_disk_smart(GuestDiskInfo *disk) { if (disk->address && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) { get_nvme_smart(disk); } } GuestDiskInfoList *qmp_guest_get_disks(Error **errp) { GuestDiskInfoList *ret = NULL; GuestDiskInfo *disk; DIR *dp = NULL; struct dirent *de = NULL; g_debug("listing /sys/block directory"); dp = opendir("/sys/block"); if (dp == NULL) { error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); return NULL; } while ((de = readdir(dp)) != NULL) { g_autofree char *disk_dir = NULL, *line = NULL, *size_path = NULL; char *dev_name; Error *local_err = NULL; if (de->d_type != DT_LNK) { g_debug(" skipping entry: %s", de->d_name); continue; } /* Check size and skip zero-sized disks */ g_debug(" checking disk size"); size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); if (!g_file_get_contents(size_path, &line, NULL, NULL)) { g_debug(" failed to read disk size"); continue; } if (g_strcmp0(line, "0\n") == 0) { g_debug(" skipping zero-sized disk"); continue; } g_debug(" adding %s", de->d_name); disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); dev_name = get_device_for_syspath(disk_dir); if (dev_name == NULL) { g_debug("Failed to get device name for syspath: %s", disk_dir); continue; } disk = g_new0(GuestDiskInfo, 1); disk->name = dev_name; disk->partition = false; disk->alias = get_alias_for_syspath(disk_dir); QAPI_LIST_PREPEND(ret, disk); /* Get address for non-virtual devices */ bool is_virtual = is_disk_virtual(disk_dir, &local_err); if (local_err != NULL) { g_debug(" failed to check disk path, ignoring error: %s", error_get_pretty(local_err)); error_free(local_err); local_err = NULL; /* Don't try to get the address */ is_virtual = true; } if (!is_virtual) { disk->address = get_disk_address(disk_dir, &local_err); if (local_err != NULL) { g_debug(" failed to get device info, ignoring error: %s", error_get_pretty(local_err)); error_free(local_err); local_err = NULL; } } get_disk_deps(disk_dir, disk); get_disk_smart(disk); ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); } closedir(dp); return ret; } #endif /* Return a list of the disk device(s)' info which @mount lies on */ static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, Error **errp) { GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); struct statvfs buf; unsigned long used, nonroot_total, fr_size; char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", mount->devmajor, mount->devminor); fs->mountpoint = g_strdup(mount->dirname); fs->type = g_strdup(mount->devtype); build_guest_fsinfo_for_device(devpath, fs, errp); if (statvfs(fs->mountpoint, &buf) == 0) { fr_size = buf.f_frsize; used = buf.f_blocks - buf.f_bfree; nonroot_total = used + buf.f_bavail; fs->used_bytes = used * fr_size; fs->total_bytes = nonroot_total * fr_size; fs->total_bytes_privileged = buf.f_blocks * fr_size; fs->has_total_bytes = true; fs->has_total_bytes_privileged = true; fs->has_used_bytes = true; } g_free(devpath); return fs; } GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) { FsMountList mounts; struct FsMount *mount; GuestFilesystemInfoList *ret = NULL; Error *local_err = NULL; QTAILQ_INIT(&mounts); if (!build_fs_mount_list(&mounts, &local_err)) { error_propagate(errp, local_err); return NULL; } QTAILQ_FOREACH(mount, &mounts, next) { g_debug("Building guest fsinfo for '%s'", mount->dirname); QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); if (local_err) { error_propagate(errp, local_err); qapi_free_GuestFilesystemInfoList(ret); ret = NULL; break; } } free_fs_mount_list(&mounts); return ret; } #endif /* CONFIG_FSFREEZE */ #if defined(CONFIG_FSTRIM) /* * Walk list of mounted file systems in the guest, and trim them. */ GuestFilesystemTrimResponse * qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) { GuestFilesystemTrimResponse *response; GuestFilesystemTrimResult *result; int ret = 0; FsMountList mounts; struct FsMount *mount; int fd; struct fstrim_range r; slog("guest-fstrim called"); QTAILQ_INIT(&mounts); if (!build_fs_mount_list(&mounts, errp)) { return NULL; } response = g_malloc0(sizeof(*response)); QTAILQ_FOREACH(mount, &mounts, next) { result = g_malloc0(sizeof(*result)); result->path = g_strdup(mount->dirname); QAPI_LIST_PREPEND(response->paths, result); fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); if (fd == -1) { result->error = g_strdup_printf("failed to open: %s", strerror(errno)); continue; } /* We try to cull filesystems we know won't work in advance, but other * filesystems may not implement fstrim for less obvious reasons. * These will report EOPNOTSUPP; while in some other cases ENOTTY * will be reported (e.g. CD-ROMs). * Any other error means an unexpected error. */ r.start = 0; r.len = -1; r.minlen = has_minimum ? minimum : 0; ret = ioctl(fd, FITRIM, &r); if (ret == -1) { if (errno == ENOTTY || errno == EOPNOTSUPP) { result->error = g_strdup("trim not supported"); } else { result->error = g_strdup_printf("failed to trim: %s", strerror(errno)); } close(fd); continue; } result->has_minimum = true; result->minimum = r.minlen; result->has_trimmed = true; result->trimmed = r.len; close(fd); } free_fs_mount_list(&mounts); return response; } #endif /* CONFIG_FSTRIM */ #define LINUX_SYS_STATE_FILE "/sys/power/state" #define SUSPEND_SUPPORTED 0 #define SUSPEND_NOT_SUPPORTED 1 typedef enum { SUSPEND_MODE_DISK = 0, SUSPEND_MODE_RAM = 1, SUSPEND_MODE_HYBRID = 2, } SuspendMode; /* * Executes a command in a child process using g_spawn_sync, * returning an int >= 0 representing the exit status of the * process. * * If the program wasn't found in path, returns -1. * * If a problem happened when creating the child process, * returns -1 and errp is set. */ static int run_process_child(const char *command[], Error **errp) { int exit_status, spawn_flag; GError *g_err = NULL; bool success; spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL; success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag, NULL, NULL, NULL, NULL, &exit_status, &g_err); if (success) { return WEXITSTATUS(exit_status); } if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { error_setg(errp, "failed to create child process, error '%s'", g_err->message); } g_error_free(g_err); return -1; } static bool systemd_supports_mode(SuspendMode mode, Error **errp) { const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", "systemd-hybrid-sleep"}; const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; int status; status = run_process_child(cmd, errp); /* * systemctl status uses LSB return codes so we can expect * status > 0 and be ok. To assert if the guest has support * for the selected suspend mode, status should be < 4. 4 is * the code for unknown service status, the return value when * the service does not exist. A common value is status = 3 * (program is not running). */ if (status > 0 && status < 4) { return true; } return false; } static void systemd_suspend(SuspendMode mode, Error **errp) { Error *local_err = NULL; const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; int status; status = run_process_child(cmd, &local_err); if (status == 0) { return; } if ((status == -1) && !local_err) { error_setg(errp, "the helper program 'systemctl %s' was not found", systemctl_args[mode]); return; } if (local_err) { error_propagate(errp, local_err); } else { error_setg(errp, "the helper program 'systemctl %s' returned an " "unexpected exit status code (%d)", systemctl_args[mode], status); } } static bool pmutils_supports_mode(SuspendMode mode, Error **errp) { Error *local_err = NULL; const char *pmutils_args[3] = {"--hibernate", "--suspend", "--suspend-hybrid"}; const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; int status; status = run_process_child(cmd, &local_err); if (status == SUSPEND_SUPPORTED) { return true; } if ((status == -1) && !local_err) { return false; } if (local_err) { error_propagate(errp, local_err); } else { error_setg(errp, "the helper program '%s' returned an unexpected exit" " status code (%d)", "pm-is-supported", status); } return false; } static void pmutils_suspend(SuspendMode mode, Error **errp) { Error *local_err = NULL; const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", "pm-suspend-hybrid"}; const char *cmd[2] = {pmutils_binaries[mode], NULL}; int status; status = run_process_child(cmd, &local_err); if (status == 0) { return; } if ((status == -1) && !local_err) { error_setg(errp, "the helper program '%s' was not found", pmutils_binaries[mode]); return; } if (local_err) { error_propagate(errp, local_err); } else { error_setg(errp, "the helper program '%s' returned an unexpected exit" " status code (%d)", pmutils_binaries[mode], status); } } static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) { const char *sysfile_strs[3] = {"disk", "mem", NULL}; const char *sysfile_str = sysfile_strs[mode]; char buf[32]; /* hopefully big enough */ int fd; ssize_t ret; if (!sysfile_str) { error_setg(errp, "unknown guest suspend mode"); return false; } fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); if (fd < 0) { return false; } ret = read(fd, buf, sizeof(buf) - 1); close(fd); if (ret <= 0) { return false; } buf[ret] = '\0'; if (strstr(buf, sysfile_str)) { return true; } return false; } static void linux_sys_state_suspend(SuspendMode mode, Error **errp) { g_autoptr(GError) local_gerr = NULL; const char *sysfile_strs[3] = {"disk", "mem", NULL}; const char *sysfile_str = sysfile_strs[mode]; if (!sysfile_str) { error_setg(errp, "unknown guest suspend mode"); return; } if (!g_file_set_contents(LINUX_SYS_STATE_FILE, sysfile_str, -1, &local_gerr)) { error_setg(errp, "suspend: cannot write to '%s': %s", LINUX_SYS_STATE_FILE, local_gerr->message); return; } } static void guest_suspend(SuspendMode mode, Error **errp) { Error *local_err = NULL; bool mode_supported = false; if (systemd_supports_mode(mode, &local_err)) { mode_supported = true; systemd_suspend(mode, &local_err); if (!local_err) { return; } } error_free(local_err); local_err = NULL; if (pmutils_supports_mode(mode, &local_err)) { mode_supported = true; pmutils_suspend(mode, &local_err); if (!local_err) { return; } } error_free(local_err); local_err = NULL; if (linux_sys_state_supports_mode(mode, &local_err)) { mode_supported = true; linux_sys_state_suspend(mode, &local_err); } if (!mode_supported) { error_free(local_err); error_setg(errp, "the requested suspend mode is not supported by the guest"); } else { error_propagate(errp, local_err); } } void qmp_guest_suspend_disk(Error **errp) { guest_suspend(SUSPEND_MODE_DISK, errp); } void qmp_guest_suspend_ram(Error **errp) { guest_suspend(SUSPEND_MODE_RAM, errp); } void qmp_guest_suspend_hybrid(Error **errp) { guest_suspend(SUSPEND_MODE_HYBRID, errp); } /* Transfer online/offline status between @vcpu and the guest system. * * On input either @errp or *@errp must be NULL. * * In system-to-@vcpu direction, the following @vcpu fields are accessed: * - R: vcpu->logical_id * - W: vcpu->online * - W: vcpu->can_offline * * In @vcpu-to-system direction, the following @vcpu fields are accessed: * - R: vcpu->logical_id * - R: vcpu->online * * Written members remain unmodified on error. */ static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, char *dirpath, Error **errp) { int fd; int res; int dirfd; static const char fn[] = "online"; dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); if (dirfd == -1) { error_setg_errno(errp, errno, "open(\"%s\")", dirpath); return; } fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); if (fd == -1) { if (errno != ENOENT) { error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); } else if (sys2vcpu) { vcpu->online = true; vcpu->can_offline = false; } else if (!vcpu->online) { error_setg(errp, "logical processor #%" PRId64 " can't be " "offlined", vcpu->logical_id); } /* otherwise pretend successful re-onlining */ } else { unsigned char status; res = pread(fd, &status, 1, 0); if (res == -1) { error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); } else if (res == 0) { error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, fn); } else if (sys2vcpu) { vcpu->online = (status != '0'); vcpu->can_offline = true; } else if (vcpu->online != (status != '0')) { status = '0' + vcpu->online; if (pwrite(fd, &status, 1, 0) == -1) { error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, fn); } } /* otherwise pretend successful re-(on|off)-lining */ res = close(fd); g_assert(res == 0); } res = close(dirfd); g_assert(res == 0); } GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) { GuestLogicalProcessorList *head, **tail; const char *cpu_dir = "/sys/devices/system/cpu"; const gchar *line; g_autoptr(GDir) cpu_gdir = NULL; Error *local_err = NULL; head = NULL; tail = &head; cpu_gdir = g_dir_open(cpu_dir, 0, NULL); if (cpu_gdir == NULL) { error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); return NULL; } while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { GuestLogicalProcessor *vcpu; int64_t id; if (sscanf(line, "cpu%" PRId64, &id)) { g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" "cpu%" PRId64 "/", id); vcpu = g_malloc0(sizeof *vcpu); vcpu->logical_id = id; vcpu->has_can_offline = true; /* lolspeak ftw */ transfer_vcpu(vcpu, true, path, &local_err); QAPI_LIST_APPEND(tail, vcpu); } } if (local_err == NULL) { /* there's no guest with zero VCPUs */ g_assert(head != NULL); return head; } qapi_free_GuestLogicalProcessorList(head); error_propagate(errp, local_err); return NULL; } int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) { int64_t processed; Error *local_err = NULL; processed = 0; while (vcpus != NULL) { char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", vcpus->value->logical_id); transfer_vcpu(vcpus->value, false, path, &local_err); g_free(path); if (local_err != NULL) { break; } ++processed; vcpus = vcpus->next; } if (local_err != NULL) { if (processed == 0) { error_propagate(errp, local_err); } else { error_free(local_err); } } return processed; } static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, int size, Error **errp) { int fd; int res; errno = 0; fd = openat(dirfd, pathname, O_RDONLY); if (fd == -1) { error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); return; } res = pread(fd, buf, size, 0); if (res == -1) { error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); } else if (res == 0) { error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); } close(fd); } static void ga_write_sysfs_file(int dirfd, const char *pathname, const char *buf, int size, Error **errp) { int fd; errno = 0; fd = openat(dirfd, pathname, O_WRONLY); if (fd == -1) { error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); return; } if (pwrite(fd, buf, size, 0) == -1) { error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); } close(fd); } /* Transfer online/offline status between @mem_blk and the guest system. * * On input either @errp or *@errp must be NULL. * * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: * - R: mem_blk->phys_index * - W: mem_blk->online * - W: mem_blk->can_offline * * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: * - R: mem_blk->phys_index * - R: mem_blk->online *- R: mem_blk->can_offline * Written members remain unmodified on error. */ static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, GuestMemoryBlockResponse *result, Error **errp) { char *dirpath; int dirfd; char *status; Error *local_err = NULL; if (!sys2memblk) { DIR *dp; if (!result) { error_setg(errp, "Internal error, 'result' should not be NULL"); return; } errno = 0; dp = opendir("/sys/devices/system/memory/"); /* if there is no 'memory' directory in sysfs, * we think this VM does not support online/offline memory block, * any other solution? */ if (!dp) { if (errno == ENOENT) { result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; } goto out1; } closedir(dp); } dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", mem_blk->phys_index); dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); if (dirfd == -1) { if (sys2memblk) { error_setg_errno(errp, errno, "open(\"%s\")", dirpath); } else { if (errno == ENOENT) { result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; } else { result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; } } g_free(dirpath); goto out1; } g_free(dirpath); status = g_malloc0(10); ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); if (local_err) { /* treat with sysfs file that not exist in old kernel */ if (errno == ENOENT) { error_free(local_err); if (sys2memblk) { mem_blk->online = true; mem_blk->can_offline = false; } else if (!mem_blk->online) { result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; } } else { if (sys2memblk) { error_propagate(errp, local_err); } else { error_free(local_err); result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; } } goto out2; } if (sys2memblk) { char removable = '0'; mem_blk->online = (strncmp(status, "online", 6) == 0); ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); if (local_err) { /* if no 'removable' file, it doesn't support offline mem blk */ if (errno == ENOENT) { error_free(local_err); mem_blk->can_offline = false; } else { error_propagate(errp, local_err); } } else { mem_blk->can_offline = (removable != '0'); } } else { if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { const char *new_state = mem_blk->online ? "online" : "offline"; ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), &local_err); if (local_err) { error_free(local_err); result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; goto out2; } result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; result->has_error_code = false; } /* otherwise pretend successful re-(on|off)-lining */ } g_free(status); close(dirfd); return; out2: g_free(status); close(dirfd); out1: if (!sys2memblk) { result->has_error_code = true; result->error_code = errno; } } GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) { GuestMemoryBlockList *head, **tail; Error *local_err = NULL; struct dirent *de; DIR *dp; head = NULL; tail = &head; dp = opendir("/sys/devices/system/memory/"); if (!dp) { /* it's ok if this happens to be a system that doesn't expose * memory blocks via sysfs, but otherwise we should report * an error */ if (errno != ENOENT) { error_setg_errno(errp, errno, "Can't open directory" "\"/sys/devices/system/memory/\""); } return NULL; } /* Note: the phys_index of memory block may be discontinuous, * this is because a memblk is the unit of the Sparse Memory design, which * allows discontinuous memory ranges (ex. NUMA), so here we should * traverse the memory block directory. */ while ((de = readdir(dp)) != NULL) { GuestMemoryBlock *mem_blk; if ((strncmp(de->d_name, "memory", 6) != 0) || !(de->d_type & DT_DIR)) { continue; } mem_blk = g_malloc0(sizeof *mem_blk); /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); mem_blk->has_can_offline = true; /* lolspeak ftw */ transfer_memory_block(mem_blk, true, NULL, &local_err); if (local_err) { break; } QAPI_LIST_APPEND(tail, mem_blk); } closedir(dp); if (local_err == NULL) { /* there's no guest with zero memory blocks */ if (head == NULL) { error_setg(errp, "guest reported zero memory blocks!"); } return head; } qapi_free_GuestMemoryBlockList(head); error_propagate(errp, local_err); return NULL; } GuestMemoryBlockResponseList * qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) { GuestMemoryBlockResponseList *head, **tail; Error *local_err = NULL; head = NULL; tail = &head; while (mem_blks != NULL) { GuestMemoryBlockResponse *result; GuestMemoryBlock *current_mem_blk = mem_blks->value; result = g_malloc0(sizeof(*result)); result->phys_index = current_mem_blk->phys_index; transfer_memory_block(current_mem_blk, false, result, &local_err); if (local_err) { /* should never happen */ goto err; } QAPI_LIST_APPEND(tail, result); mem_blks = mem_blks->next; } return head; err: qapi_free_GuestMemoryBlockResponseList(head); error_propagate(errp, local_err); return NULL; } GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) { Error *local_err = NULL; char *dirpath; int dirfd; char *buf; GuestMemoryBlockInfo *info; dirpath = g_strdup_printf("/sys/devices/system/memory/"); dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); if (dirfd == -1) { error_setg_errno(errp, errno, "open(\"%s\")", dirpath); g_free(dirpath); return NULL; } g_free(dirpath); buf = g_malloc0(20); ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); close(dirfd); if (local_err) { g_free(buf); error_propagate(errp, local_err); return NULL; } info = g_new0(GuestMemoryBlockInfo, 1); info->size = strtol(buf, NULL, 16); /* the unit is bytes */ g_free(buf); return info; } #define MAX_NAME_LEN 128 static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) { GuestDiskStatsInfoList *head = NULL, **tail = &head; const char *diskstats = "/proc/diskstats"; FILE *fp; size_t n; char *line = NULL; fp = fopen(diskstats, "r"); if (fp == NULL) { error_setg_errno(errp, errno, "open(\"%s\")", diskstats); return NULL; } while (getline(&line, &n, fp) != -1) { g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; g_autofree GuestDiskStats *diskstat = NULL; char dev_name[MAX_NAME_LEN]; unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; unsigned long dc_ios, dc_merges, dc_sec, fl_ios; unsigned int major, minor; int i; i = sscanf(line, "%u %u %s %lu %lu %lu" "%lu %lu %lu %lu %u %u %u %u" "%lu %lu %lu %u %lu %u", &major, &minor, dev_name, &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, &dc_ios, &dc_merges, &dc_sec, &dc_ticks, &fl_ios, &fl_ticks); if (i < 7) { continue; } diskstatinfo = g_new0(GuestDiskStatsInfo, 1); diskstatinfo->name = g_strdup(dev_name); diskstatinfo->major = major; diskstatinfo->minor = minor; diskstat = g_new0(GuestDiskStats, 1); if (i == 7) { diskstat->has_read_ios = true; diskstat->read_ios = rd_ios; diskstat->has_read_sectors = true; diskstat->read_sectors = rd_merges_or_rd_sec; diskstat->has_write_ios = true; diskstat->write_ios = rd_sec_or_wr_ios; diskstat->has_write_sectors = true; diskstat->write_sectors = rd_ticks_or_wr_sec; } if (i >= 14) { diskstat->has_read_ios = true; diskstat->read_ios = rd_ios; diskstat->has_read_sectors = true; diskstat->read_sectors = rd_sec_or_wr_ios; diskstat->has_read_merges = true; diskstat->read_merges = rd_merges_or_rd_sec; diskstat->has_read_ticks = true; diskstat->read_ticks = rd_ticks_or_wr_sec; diskstat->has_write_ios = true; diskstat->write_ios = wr_ios; diskstat->has_write_sectors = true; diskstat->write_sectors = wr_sec; diskstat->has_write_merges = true; diskstat->write_merges = wr_merges; diskstat->has_write_ticks = true; diskstat->write_ticks = wr_ticks; diskstat->has_ios_pgr = true; diskstat->ios_pgr = ios_pgr; diskstat->has_total_ticks = true; diskstat->total_ticks = tot_ticks; diskstat->has_weight_ticks = true; diskstat->weight_ticks = rq_ticks; } if (i >= 18) { diskstat->has_discard_ios = true; diskstat->discard_ios = dc_ios; diskstat->has_discard_merges = true; diskstat->discard_merges = dc_merges; diskstat->has_discard_sectors = true; diskstat->discard_sectors = dc_sec; diskstat->has_discard_ticks = true; diskstat->discard_ticks = dc_ticks; } if (i >= 20) { diskstat->has_flush_ios = true; diskstat->flush_ios = fl_ios; diskstat->has_flush_ticks = true; diskstat->flush_ticks = fl_ticks; } diskstatinfo->stats = g_steal_pointer(&diskstat); QAPI_LIST_APPEND(tail, diskstatinfo); diskstatinfo = NULL; } free(line); fclose(fp); return head; } GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) { return guest_get_diskstats(errp); } GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) { GuestCpuStatsList *head = NULL, **tail = &head; const char *cpustats = "/proc/stat"; int clk_tck = sysconf(_SC_CLK_TCK); FILE *fp; size_t n; char *line = NULL; fp = fopen(cpustats, "r"); if (fp == NULL) { error_setg_errno(errp, errno, "open(\"%s\")", cpustats); return NULL; } while (getline(&line, &n, fp) != -1) { GuestCpuStats *cpustat = NULL; GuestLinuxCpuStats *linuxcpustat; int i; unsigned long user, system, idle, iowait, irq, softirq, steal, guest; unsigned long nice, guest_nice; char name[64]; i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", name, &user, &nice, &system, &idle, &iowait, &irq, &softirq, &steal, &guest, &guest_nice); /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */ if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) { continue; } if (i < 5) { slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats); break; } cpustat = g_new0(GuestCpuStats, 1); cpustat->type = GUEST_CPU_STATS_TYPE_LINUX; linuxcpustat = &cpustat->u.q_linux; linuxcpustat->cpu = atoi(&name[3]); linuxcpustat->user = user * 1000 / clk_tck; linuxcpustat->nice = nice * 1000 / clk_tck; linuxcpustat->system = system * 1000 / clk_tck; linuxcpustat->idle = idle * 1000 / clk_tck; if (i > 5) { linuxcpustat->has_iowait = true; linuxcpustat->iowait = iowait * 1000 / clk_tck; } if (i > 6) { linuxcpustat->has_irq = true; linuxcpustat->irq = irq * 1000 / clk_tck; linuxcpustat->has_softirq = true; linuxcpustat->softirq = softirq * 1000 / clk_tck; } if (i > 8) { linuxcpustat->has_steal = true; linuxcpustat->steal = steal * 1000 / clk_tck; } if (i > 9) { linuxcpustat->has_guest = true; linuxcpustat->guest = guest * 1000 / clk_tck; } if (i > 10) { linuxcpustat->has_guest = true; linuxcpustat->guest = guest * 1000 / clk_tck; linuxcpustat->has_guestnice = true; linuxcpustat->guestnice = guest_nice * 1000 / clk_tck; } QAPI_LIST_APPEND(tail, cpustat); } free(line); fclose(fp); return head; } static char *hex_to_ip_address(const void *hex_value, int is_ipv6) { if (is_ipv6) { char addr[INET6_ADDRSTRLEN]; struct in6_addr in6; const char *hex_str = (const char *)hex_value; int i; for (i = 0; i < 16; i++) { if (sscanf(&hex_str[i * 2], "%02hhx", &in6.s6_addr[i]) != 1) { return NULL; } } inet_ntop(AF_INET6, &in6, addr, INET6_ADDRSTRLEN); return g_strdup(addr); } else { unsigned int hex_int = *(unsigned int *)hex_value; unsigned int byte1 = (hex_int >> 24) & 0xFF; unsigned int byte2 = (hex_int >> 16) & 0xFF; unsigned int byte3 = (hex_int >> 8) & 0xFF; unsigned int byte4 = hex_int & 0xFF; return g_strdup_printf("%u.%u.%u.%u", byte4, byte3, byte2, byte1); } } GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) { GuestNetworkRouteList *head = NULL, **tail = &head; const char *route_files[] = {"/proc/net/route", "/proc/net/ipv6_route"}; FILE *fp; size_t n = 0; char *line = NULL; int firstLine; int is_ipv6; int i; char iface[IFNAMSIZ]; for (i = 0; i < 2; i++) { firstLine = 1; is_ipv6 = (i == 1); fp = fopen(route_files[i], "r"); if (fp == NULL) { error_setg_errno(errp, errno, "open(\"%s\")", route_files[i]); continue; } while (getline(&line, &n, fp) != -1) { if (firstLine && !is_ipv6) { firstLine = 0; continue; } g_autoptr(GuestNetworkRoute) route = g_new0(GuestNetworkRoute, 1); if (is_ipv6) { char destination[33], source[33], next_hop[33]; int des_prefixlen, src_prefixlen, metric, refcnt, use, flags; if (sscanf(line, "%32s %x %32s %x %32s %x %x %x %x %s", destination, &des_prefixlen, source, &src_prefixlen, next_hop, &metric, &refcnt, &use, &flags, iface) != 10) { continue; } route->destination = hex_to_ip_address(destination, 1); if (route->destination == NULL) { continue; } route->iface = g_strdup(iface); route->source = hex_to_ip_address(source, 1); route->nexthop = hex_to_ip_address(next_hop, 1); route->desprefixlen = g_strdup_printf("%d", des_prefixlen); route->srcprefixlen = g_strdup_printf("%d", src_prefixlen); route->metric = metric; route->has_flags = true; route->flags = flags; route->has_refcnt = true; route->refcnt = refcnt; route->has_use = true; route->use = use; route->version = 6; } else { unsigned int destination, gateway, mask, flags; int refcnt, use, metric, mtu, window, irtt; if (sscanf(line, "%s %X %X %x %d %d %d %X %d %d %d", iface, &destination, &gateway, &flags, &refcnt, &use, &metric, &mask, &mtu, &window, &irtt) != 11) { continue; } route->destination = hex_to_ip_address(&destination, 0); if (route->destination == NULL) { continue; } route->iface = g_strdup(iface); route->gateway = hex_to_ip_address(&gateway, 0); route->mask = hex_to_ip_address(&mask, 0); route->metric = metric; route->has_flags = true; route->flags = flags; route->has_refcnt = true; route->refcnt = refcnt; route->has_use = true; route->use = use; route->has_mtu = true; route->mtu = mtu; route->has_window = true; route->window = window; route->has_irtt = true; route->irtt = irtt; route->version = 4; } QAPI_LIST_APPEND(tail, route); route = NULL; } fclose(fp); } free(line); return head; }