Revision 8c574358 image_creator/disk.py
| b/image_creator/disk.py | ||
|---|---|---|
| 13 | 13 |
from pbs import blockdev |
| 14 | 14 |
from pbs import dd |
| 15 | 15 |
|
| 16 |
class DiskError(Exception): pass |
|
| 16 |
|
|
| 17 |
class DiskError(Exception): |
|
| 18 |
pass |
|
| 19 |
|
|
| 17 | 20 |
|
| 18 | 21 |
class Disk(object): |
| 19 | 22 |
|
| ... | ... | |
| 38 | 41 |
while len(self._devices): |
| 39 | 42 |
device = self._devices.pop() |
| 40 | 43 |
device.destroy() |
| 41 |
|
|
| 44 |
|
|
| 42 | 45 |
while len(self._cleanup_jobs): |
| 43 | 46 |
job, args = self._cleanup_jobs.pop() |
| 44 | 47 |
job(*args) |
| ... | ... | |
| 57 | 60 |
size = blockdev('--getsize', sourcedev)
|
| 58 | 61 |
cowfd, cow = tempfile.mkstemp() |
| 59 | 62 |
self._add_cleanup(os.unlink, cow) |
| 60 |
# Create 1G cow file |
|
| 61 |
dd('if=/dev/null', 'of=%s' % cow, 'bs=1k' ,'seek=%d' % (1024*1024))
|
|
| 63 |
# Create 1G cow sparse file
|
|
| 64 |
dd('if=/dev/null', 'of=%s' % cow, 'bs=1k', 'seek=%d' % (1024 * 1024))
|
|
| 62 | 65 |
cowdev = self._losetup(cow) |
| 63 | 66 |
|
| 64 | 67 |
snapshot = uuid.uuid4().hex |
| ... | ... | |
| 79 | 82 |
self._devices.remove(device) |
| 80 | 83 |
device.destroy() |
| 81 | 84 |
|
| 85 |
|
|
| 82 | 86 |
class DiskDevice(object): |
| 83 | 87 |
|
| 84 |
def __init__(self, device, bootable = True):
|
|
| 88 |
def __init__(self, device, bootable=True):
|
|
| 85 | 89 |
self.device = device |
| 86 | 90 |
self.bootable = bootable |
| 87 | 91 |
|
| ... | ... | |
| 89 | 93 |
|
| 90 | 94 |
self.g.set_trace(1) |
| 91 | 95 |
|
| 92 |
self.g.add_drive_opts(device, readonly = 0)
|
|
| 96 |
self.g.add_drive_opts(device, readonly=0)
|
|
| 93 | 97 |
self.g.launch() |
| 94 | 98 |
roots = self.g.inspect_os() |
| 95 | 99 |
if len(roots) == 0: |
| ... | ... | |
| 100 | 104 |
self.root = roots[0] |
| 101 | 105 |
self.ostype = self.g.inspect_get_type(self.root) |
| 102 | 106 |
self.distro = self.g.inspect_get_distro(self.root) |
| 103 |
|
|
| 107 |
|
|
| 104 | 108 |
def destroy(self): |
| 105 | 109 |
self.g.umount_all() |
| 106 | 110 |
self.g.sync() |
| 107 | 111 |
# Close the guestfs handler |
| 108 | 112 |
self.g.close() |
| 109 | 113 |
del self.g |
| 110 |
|
|
| 114 |
|
|
| 111 | 115 |
def mount(self): |
| 112 | 116 |
mps = self.g.inspect_get_mountpoints(self.root) |
| 117 |
|
|
| 113 | 118 |
# Sort the keys to mount the fs in a correct order. |
| 114 | 119 |
# / should be mounted befor /boot, etc |
| 115 |
def compare (a, b): |
|
| 116 |
if len(a[0]) > len(b[0]): return 1 |
|
| 117 |
elif len(a[0]) == len(b[0]): return 0 |
|
| 118 |
else: return -1 |
|
| 120 |
def compare(a, b): |
|
| 121 |
if len(a[0]) > len(b[0]): |
|
| 122 |
return 1 |
|
| 123 |
elif len(a[0]) == len(b[0]): |
|
| 124 |
return 0 |
|
| 125 |
else: |
|
| 126 |
return -1 |
|
| 119 | 127 |
mps.sort(compare) |
| 120 | 128 |
for mp, dev in mps: |
| 121 | 129 |
try: |
| ... | ... | |
| 123 | 131 |
except RuntimeError as msg: |
| 124 | 132 |
print "%s (ignored)" % msg |
| 125 | 133 |
|
| 134 |
def umount(self): |
|
| 135 |
self.g.umount_all() |
|
| 136 |
|
|
| 137 |
def shrink(self): |
|
| 138 |
dev = self.g.part_to_dev(self.root) |
|
| 139 |
parttype = self.g.part_get_parttype(dev) |
|
| 140 |
if parttype != 'msdos': |
|
| 141 |
raise DiskError("You have a %s partition table. "
|
|
| 142 |
"Only msdos partitions are supported" % parttype) |
|
| 143 |
|
|
| 144 |
last_partition = self.g.part_list(dev)[-1] |
|
| 145 |
|
|
| 146 |
if last_partition['part_num'] > 4: |
|
| 147 |
raise DiskError("This disk contains logical partitions. "
|
|
| 148 |
"Only primary partitions are supported.") |
|
| 149 |
|
|
| 150 |
part_dev = "%s%d" % (dev, last_partition['part_num']) |
|
| 151 |
fs_type = self.g.vfs_type(part_dev) |
|
| 152 |
if not re.match("ext[234]", fs_type):
|
|
| 153 |
print "Warning, don't know how to resize %s partitions" % vfs_type |
|
| 154 |
return |
|
| 155 |
|
|
| 156 |
self.g.e2fsck_f(part_dev) |
|
| 157 |
self.g.resize2fs_M(part_dev) |
|
| 158 |
output = self.g.tune2fs_l(part_dev) |
|
| 159 |
block_size = int(filter(lambda x: x[0] == 'Block size', output)[0][1]) |
|
| 160 |
block_cnt = int(filter(lambda x: x[0] == 'Block count', output)[0][1]) |
|
| 161 |
|
|
| 162 |
sector_size = self.g.blockdev_getss(dev) |
|
| 163 |
|
|
| 164 |
start = last_partition['part_start'] / sector_size |
|
| 165 |
end = start + (block_size * block_cnt) / sector_size - 1 |
|
| 166 |
|
|
| 167 |
|
|
| 168 |
|
|
| 126 | 169 |
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |
Also available in: Unified diff