def _do(self):
assert(len(self.components) > 0)
path = getMirrorDevPath(self.lvolid)
if not os.path.exists(path):
do_assemble = False
mirrordevs = ""
for c in self.components:
blockdev_getsize(c.path) # XXX is this necessary?
if c.mirror_status == MIRROR_STATUS['ALLOCATED']:
mirrordevs += " " + c.path
elif c.mirror_status == MIRROR_STATUS['INSYNC']:
mirrordevs += " " + c.path
do_assemble = True
mdcommand = ""
if do_assemble:
mdcommand = "mdadm --assemble %s %s %s" % \
(path, MDADM_ASSEMBLE_OPTIONS, mirrordevs)
executemdadm(mdcommand)
else: # all extents are ALLOCATED. do --create
mdcommand = \
"mdadm --create %s %s --assume-clean --raid-devices=%d %s" \
% (path, MDADM_CREATE_OPTIONS, len(self.components), \
mirrordevs)
executemdadm(mdcommand)
blockdev_getsize(path) # XXX is this necessary?
self.path = path
def do(self):
assert(len(self.components) > 0)
name = getSnapshotDevName(self.lvolid)
path = getDmDevPath(name)
if not os.path.exists(path):
origin_path = getSnapshotOriginOriginPath( \
self.snapshot_origin_lvolid)
origin_size = blockdev_getsize(origin_path)
c = self.components[0]
command = \
"echo 0 %s snapshot %s %s P %u | dmsetup create --readonly %s" \
% (origin_size, origin_path, c.path, SNAPSHOT_CHUNK_SIZE, name)
execute_retry_not_path_exist(command, path, DMSETUP_RETRY_TIMES)
self.path = path