int setup_machine_directory(uint64_t size, sd_bus_error *error) {
_cleanup_release_lock_file_ LockFile lock_file = LOCK_FILE_INIT;
struct loop_info64 info = {
.lo_flags = LO_FLAGS_AUTOCLEAR,
};
_cleanup_close_ int fd = -1, control = -1, loop = -1;
_cleanup_free_ char* loopdev = NULL;
char tmpdir[] = "/tmp/machine-pool.XXXXXX", *mntdir = NULL;
bool tmpdir_made = false, mntdir_made = false, mntdir_mounted = false;
char buf[FORMAT_BYTES_MAX];
int r, nr = -1;
/* btrfs cannot handle file systems < 16M, hence use this as minimum */
if (size == (uint64_t) -1)
size = VAR_LIB_MACHINES_SIZE_START;
else if (size < 16*1024*1024)
size = 16*1024*1024;
/* Make sure we only set the directory up once at a time */
r = make_lock_file("/run/systemd/machines.lock", LOCK_EX, &lock_file);
if (r < 0)
return r;
r = check_btrfs();
if (r < 0)
return sd_bus_error_set_errnof(error, r, "Failed to determine whether /var/lib/machines is located on btrfs: %m");
if (r > 0) {
(void) btrfs_subvol_make_label("/var/lib/machines");
r = btrfs_quota_enable("/var/lib/machines", true);
if (r < 0)
log_warning_errno(r, "Failed to enable quota for /var/lib/machines, ignoring: %m");
r = btrfs_subvol_auto_qgroup("/var/lib/machines", 0, true);
if (r < 0)
log_warning_errno(r, "Failed to set up default quota hierarchy for /var/lib/machines, ignoring: %m");
return 1;
}
if (path_is_mount_point("/var/lib/machines", AT_SYMLINK_FOLLOW) > 0) {
log_debug("/var/lib/machines is already a mount point, not creating loopback file for it.");
return 0;
}
r = dir_is_populated("/var/lib/machines");
if (r < 0 && r != -ENOENT)
return r;
if (r > 0) {
log_debug("/var/log/machines is already populated, not creating loopback file for it.");
return 0;
}
r = mkfs_exists("btrfs");
if (r == -ENOENT) {
log_debug("mkfs.btrfs is missing, cannot create loopback file for /var/lib/machines.");
return 0;
}
if (r < 0)
return r;
fd = setup_machine_raw(size, error);
if (fd < 0)
return fd;
control = open("/dev/loop-control", O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
if (control < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to open /dev/loop-control: %m");
nr = ioctl(control, LOOP_CTL_GET_FREE);
if (nr < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to allocate loop device: %m");
if (asprintf(&loopdev, "/dev/loop%i", nr) < 0) {
r = -ENOMEM;
goto fail;
}
loop = open(loopdev, O_CLOEXEC|O_RDWR|O_NOCTTY|O_NONBLOCK);
if (loop < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to open loopback device: %m");
goto fail;
}
if (ioctl(loop, LOOP_SET_FD, fd) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to bind loopback device: %m");
goto fail;
}
if (ioctl(loop, LOOP_SET_STATUS64, &info) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to enable auto-clear for loopback device: %m");
goto fail;
}
/* We need to make sure the new /var/lib/machines directory
* has an access mode of 0700 at the time it is first made
* available. mkfs will create it with 0755 however. Hence,
* let's mount the directory into an inaccessible directory
* below /tmp first, fix the access mode, and move it to the
* public place then. */
if (!mkdtemp(tmpdir)) {
r = sd_bus_error_set_errnof(error, errno, "Failed to create temporary mount parent directory: %m");
goto fail;
}
tmpdir_made = true;
mntdir = strjoina(tmpdir, "/mnt");
if (mkdir(mntdir, 0700) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to create temporary mount directory: %m");
goto fail;
}
mntdir_made = true;
if (mount(loopdev, mntdir, "btrfs", 0, NULL) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to mount loopback device: %m");
goto fail;
}
mntdir_mounted = true;
r = btrfs_quota_enable(mntdir, true);
if (r < 0)
log_warning_errno(r, "Failed to enable quota, ignoring: %m");
r = btrfs_subvol_auto_qgroup(mntdir, 0, true);
if (r < 0)
log_warning_errno(r, "Failed to set up default quota hierarchy, ignoring: %m");
if (chmod(mntdir, 0700) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to fix owner: %m");
goto fail;
}
(void) mkdir_p_label("/var/lib/machines", 0700);
if (mount(mntdir, "/var/lib/machines", NULL, MS_BIND, NULL) < 0) {
r = sd_bus_error_set_errnof(error, errno, "Failed to mount directory into right place: %m");
goto fail;
}
(void) syncfs(fd);
log_info("Set up /var/lib/machines as btrfs loopback file system of size %s mounted on /var/lib/machines.raw.", format_bytes(buf, sizeof(buf), size));
(void) umount2(mntdir, MNT_DETACH);
(void) rmdir(mntdir);
(void) rmdir(tmpdir);
return 1;
fail:
if (mntdir_mounted)
(void) umount2(mntdir, MNT_DETACH);
if (mntdir_made)
(void) rmdir(mntdir);
if (tmpdir_made)
(void) rmdir(tmpdir);
if (loop >= 0) {
(void) ioctl(loop, LOOP_CLR_FD);
loop = safe_close(loop);
}
if (control >= 0 && nr >= 0)
(void) ioctl(control, LOOP_CTL_REMOVE, nr);
return r;
}
static int check_part_none(disk_t *disk_car,const int verbose,partition_t *partition, const int saveheader)
{
int ret=0;
switch(partition->upart_type)
{
case UP_BEOS:
ret=check_BeFS(disk_car,partition);
break;
case UP_BTRFS:
ret=check_btrfs(disk_car, partition);
break;
case UP_CRAMFS:
ret=check_cramfs(disk_car,partition,verbose);
break;
case UP_EXT2:
case UP_EXT3:
case UP_EXT4:
ret=check_EXT2(disk_car,partition,verbose);
break;
case UP_EXTENDED:
break;
case UP_EXFAT:
ret=check_EXFAT(disk_car, partition);
break;
case UP_FAT12:
case UP_FAT16:
case UP_FAT32:
ret=check_FAT(disk_car,partition,verbose);
break;
case UP_FATX:
ret=check_FATX(disk_car, partition);
break;
case UP_FREEBSD:
ret=check_BSD(disk_car,partition,verbose,BSD_MAXPARTITIONS);
break;
case UP_GFS2:
ret=check_gfs2(disk_car, partition);
break;
case UP_HFS:
ret=check_HFS(disk_car,partition,verbose);
break;
case UP_HFSP:
case UP_HFSX:
ret=check_HFSP(disk_car,partition,verbose);
break;
case UP_HPFS:
ret=check_HPFS(disk_car,partition,verbose);
break;
case UP_ISO:
ret=check_ISO(disk_car, partition);
break;
case UP_JFS:
ret=check_JFS(disk_car, partition);
break;
case UP_LINSWAP:
case UP_LINSWAP2:
case UP_LINSWAP_8K:
case UP_LINSWAP2_8K:
case UP_LINSWAP2_8KBE:
ret=check_Linux_SWAP(disk_car, partition);
break;
case UP_LUKS:
ret=check_LUKS(disk_car, partition);
break;
case UP_LVM:
ret=check_LVM(disk_car,partition,verbose);
break;
case UP_LVM2:
ret=check_LVM2(disk_car,partition,verbose);
break;
case UP_NETWARE:
ret=check_netware(disk_car, partition);
break;
case UP_NTFS:
ret=check_NTFS(disk_car,partition,verbose,0);
if(ret!=0)
{ screen_buffer_add("Invalid NTFS boot\n"); }
break;
case UP_OPENBSD:
ret=check_BSD(disk_car,partition,verbose,OPENBSD_MAXPARTITIONS);
break;
case UP_OS2MB:
ret=check_OS2MB(disk_car,partition,verbose);
break;
case UP_MD:
case UP_MD1:
ret=check_MD(disk_car,partition,verbose);
if(ret!=0)
{ screen_buffer_add("Invalid RAID superblock\n"); }
break;
case UP_RFS:
case UP_RFS2:
case UP_RFS3:
case UP_RFS4:
ret=check_rfs(disk_car,partition,verbose);
break;
case UP_SUN:
ret=check_sun_i386(disk_car,partition,verbose);
break;
case UP_SYSV4:
ret=check_sysv(disk_car,partition,verbose);
break;
case UP_UFS:
case UP_UFS2:
case UP_UFS_LE:
case UP_UFS2_LE:
ret=check_ufs(disk_car,partition,verbose);
break;
case UP_VMFS:
ret=check_VMFS(disk_car, partition);
break;
case UP_WBFS:
ret=check_WBFS(disk_car, partition);
break;
case UP_XFS:
case UP_XFS2:
case UP_XFS3:
case UP_XFS4:
ret=check_xfs(disk_car,partition,verbose);
break;
case UP_ZFS:
ret=check_ZFS(disk_car, partition);
break;
case UP_UNK:
break;
}
return ret;
}