def umount(device):
if not is_mounted(device):
return
cmd = ['umount', device]
try:
check_call(cmd, shell=False)
except:
raise Error("Cannot umount %s" % device)
def write(volume, volumesize):
d_id = vlmc.map_volume(name=volume)
device = DEVICE_PREFIX + str(d_id)
try:
fd = os.open(device, os.O_WRONLY)
os.lseek(fd, (volumesize * 1024 * 1024) + 1, os.SEEK_SET)
os.write(fd, "This should not succeed")
print("wtf")
except OSError, (err, reason):
if err != errno.EINVAL:
raise Error("Cannot write to device %s : %s" % (device, reason))
def read_data(volume, mountdir, randomfiles):
d_id = vlmc.map_volume(name=volume)
device = DEVICE_PREFIX + str(d_id)
try:
mount(device, mountdir)
for rf in randomfiles:
print "reading " + rf[0]
f = open(os.path.join(mountdir, rf[0]), 'r')
data = f.read()
f.close()
if data != rf[1]:
raise Error("Data mismatch %s" % rf[0])
finally:
umount(device)
vlmc.unmap_volume(name=device)
def mount(device, directory):
cmd = ['mount', device, directory]
try:
check_call(cmd, shell=False)
except:
raise Error("Cannot mount %s to %s" % (device, directory))