def destroy(mpoint, force=False):
if not os.path.ismount(mpoint):
raise StorageError('Directory %s is not valid mount point' % mpoint)
cmd = [UMOUNT_EXEC, mpoint]
if force:
cmd.insert(1, '-f')
system(tuple(cmd), error_text="Can't destroy ramdisk.")
def destroy(mpoint, force=False):
if not os.path.ismount(mpoint):
raise StorageError('Directory %s is not valid mount point' % mpoint)
cmd = [UMOUNT_EXEC, mpoint]
if force:
cmd.insert(1, '-f')
system(tuple(cmd), error_text="Can't destroy ramdisk.")
def rmloop(device): try: system((LOSETUP_EXEC, '-d', device)) except StorageError, e: if 'No such device or address' in e.err: ''' Silently pass non-existed loop removal ''' pass else: raise
def rmloop(device):
try:
system((LOSETUP_EXEC, '-d', device))
except StorageError, e:
if 'No such device or address' in e.err:
''' Silently pass non-existed loop removal '''
pass
else:
raise
def listloop():
ret = {}
loop_lines = system((LOSETUP_EXEC, '-a'))[0].strip().splitlines()
for loop_line in loop_lines:
words = loop_line.split()
ret[words[0][:-1]] = words[-1][1:-1]
return ret
def listloop():
ret = {}
loop_lines = system((LOSETUP_EXEC, '-a'))[0].strip().splitlines()
for loop_line in loop_lines:
words = loop_line.split()
ret[words[0][:-1]] = words[-1][1:-1]
return ret
def free():
cmd = (FREE_EXEC, '-m')
out_lines = system(cmd)[0].splitlines()
free_ram = int(out_lines[1].split()[3])
free_swap = int(out_lines[3].split()[3])
return (free_ram, free_swap)
def mkloop(filename, device=None, size=None, quick=False):
''' Create loop device '''
if size and not os.path.exists(filename):
cmd = ['dd', 'if=/dev/zero', 'of=%s' % filename, 'bs=1M']
if quick:
cmd.extend(['seek=%d' % (size - 1,), 'count=1'])
else:
cmd.extend(['count=%d' % size])
system(cmd)
if not device:
system((LOSETUP_EXEC, '-f', filename))
loops = listloop()
for loopdev, fname in loops.iteritems():
if fname == filename:
return loopdev
else:
raise Exception('Cannot find loop device with %s file' % file)
else:
system((LOSETUP_EXEC, device, filename))
return device
def mkloop(filename, device=None, size=None, quick=False):
''' Create loop device '''
if size and not os.path.exists(filename):
cmd = ['dd', 'if=/dev/zero', 'of=%s' % filename, 'bs=1M']
if quick:
cmd.extend(['seek=%d' % (size - 1, ), 'count=1'])
else:
cmd.extend(['count=%d' % size])
system(cmd)
if not device:
system((LOSETUP_EXEC, '-f', filename))
loops = listloop()
for loopdev, fname in loops.iteritems():
if fname == filename:
return loopdev
else:
raise Exception('Cannot find loop device with %s file' % file)
else:
system((LOSETUP_EXEC, device, filename))
return device
def create(size, mpoint):
if not os.path.exists(mpoint):
os.makedirs(mpoint)
cmd = (MOUNT_EXEC, '-t', 'tmpfs', '-o','size=%sM'%size, 'tmpfs', mpoint)
system(cmd, error_text="Can't create ramdisk.")
def free():
cmd = (FREE_EXEC, '-m')
out_lines = system(cmd)[0].splitlines()
free_ram = int(out_lines[1].split()[3])
free_swap = int(out_lines[3].split()[3])
return (free_ram, free_swap)
def create(size, mpoint):
if not os.path.exists(mpoint):
os.makedirs(mpoint)
cmd = (MOUNT_EXEC, '-t', 'tmpfs', '-o', 'size=%sM' % size, 'tmpfs', mpoint)
system(cmd, error_text="Can't create ramdisk.")
