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import os
import tempfile
from .fs_test import FSTestCase
import overrides_hack
import utils
from utils import TestTags, tag_test
from gi.repository import BlockDev, GLib
class MountTestCase(FSTestCase):
username = "bd_mount_test"
def _add_user(self):
ret, _out, err = utils.run_command("useradd -M -p \"\" %s" % self.username)
if ret != 0:
self.fail("Failed to create user '%s': %s" % (self.username, err))
ret, uid, err = utils.run_command("id -u %s" % self.username)
if ret != 0:
self.fail("Failed to get UID for user '%s': %s" % (self.username, err))
ret, gid, err = utils.run_command("id -g %s" % self.username)
if ret != 0:
self.fail("Failed to get GID for user '%s': %s" % (self.username, err))
return (uid, gid)
def _remove_user(self):
ret, _out, err = utils.run_command("userdel %s" % self.username)
if ret != 0:
self.fail("Failed to remove user user '%s': %s" % (self.username, err))
@tag_test(TestTags.CORE)
def test_mount(self):
""" Test basic mounting and unmounting """
succ = BlockDev.fs_vfat_mkfs(self.loop_dev, None)
self.assertTrue(succ)
tmp = tempfile.mkdtemp(prefix="libblockdev.", suffix="mount_test")
self.addCleanup(os.rmdir, tmp)
self.addCleanup(utils.umount, self.loop_dev)
# try mounting unknown filesystem type
with self.assertRaisesRegex(GLib.GError, r"Filesystem type .* not configured in kernel."):
BlockDev.fs_mount(self.loop_dev, tmp, "nonexisting", None)
succ = BlockDev.fs_mount(self.loop_dev, tmp, "vfat", None)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_is_mountpoint(tmp)
self.assertTrue(succ)
mnt = BlockDev.fs_get_mountpoint(self.loop_dev)
self.assertEqual(mnt, tmp)
succ = BlockDev.fs_unmount(self.loop_dev, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
succ = BlockDev.fs_is_mountpoint(tmp)
self.assertFalse(succ)
mnt = BlockDev.fs_get_mountpoint(self.loop_dev)
self.assertIsNone(mnt)
# mount again to test unmount using the mountpoint
succ = BlockDev.fs_mount(self.loop_dev, tmp, None, None)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_unmount(tmp, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
# mount with some options
succ = BlockDev.fs_mount(self.loop_dev, tmp, "vfat", "ro,noexec")
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
_ret, out, _err = utils.run_command("grep %s /proc/mounts" % tmp)
self.assertTrue(out)
self.assertIn("ro,noexec", out)
succ = BlockDev.fs_unmount(self.loop_dev, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
# mount with UID=0 and GUID=0
succ = BlockDev.fs_mount(self.loop_dev, tmp, run_as_uid="0", run_as_gid="0")
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
with self.assertRaises(GLib.GError):
BlockDev.fs_mount(self.loop_dev, tmp, run_as_uid="a", run_as_gid="a")
succ = BlockDev.fs_unmount(self.loop_dev, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
def test_mount_ro_device(self):
""" Test mounting an FS on a RO device """
backing_file = utils.create_sparse_tempfile("ro_mount", 50 * 1024**2)
self.addCleanup(os.unlink, backing_file)
self.assertTrue(BlockDev.fs_ext2_mkfs(backing_file, None))
succ, dev = BlockDev.loop_setup(backing_file, 0, 0, True, False)
self.assertTrue(succ)
self.addCleanup(BlockDev.loop_teardown, dev)
tmp_dir = tempfile.mkdtemp(prefix="libblockdev.", suffix="mount_test")
self.addCleanup(os.rmdir, tmp_dir)
loop_dev = "/dev/" + dev
# without any options, the mount should fall back to RO
self.assertTrue(BlockDev.fs_mount(loop_dev, tmp_dir, None, None, None))
self.addCleanup(utils.umount, dev)
self.assertTrue(os.path.ismount(tmp_dir))
succ = BlockDev.fs_unmount(tmp_dir, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp_dir))
# explicit "ro" should work just fine too
self.assertTrue(BlockDev.fs_mount(loop_dev, tmp_dir, None, "ro", None))
self.assertTrue(os.path.ismount(tmp_dir))
succ = BlockDev.fs_unmount(tmp_dir, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp_dir))
# explicit "rw" should fail
with self.assertRaises(GLib.GError):
BlockDev.fs_mount(loop_dev, tmp_dir, None, "rw", None)
self.assertFalse(os.path.ismount(tmp_dir))
@tag_test(TestTags.UNSAFE)
def test_mount_fstab(self):
""" Test mounting and unmounting devices in /etc/fstab """
# this test will change /etc/fstab, we want to revert the changes when it finishes
fstab = utils.read_file("/etc/fstab")
self.addCleanup(utils.write_file, "/etc/fstab", fstab)
succ = BlockDev.fs_vfat_mkfs(self.loop_dev, None)
self.assertTrue(succ)
tmp = tempfile.mkdtemp(prefix="libblockdev.", suffix="mount_fstab_test")
self.addCleanup(os.rmdir, tmp)
utils.write_file("/etc/fstab", "%s %s vfat defaults 0 0\n" % (self.loop_dev, tmp))
# try to mount and unmount using the device
self.addCleanup(utils.umount, self.loop_dev)
succ = BlockDev.fs_mount(device=self.loop_dev)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_unmount(self.loop_dev)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
# try to mount and unmount just using the mountpoint
self.addCleanup(utils.umount, self.loop_dev)
succ = BlockDev.fs_mount(mountpoint=tmp)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_unmount(tmp)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
@tag_test(TestTags.UNSAFE)
def test_mount_fstab_user(self):
""" Test mounting and unmounting devices in /etc/fstab as non-root user """
# this test will change /etc/fstab, we want to revert the changes when it finishes
fstab = utils.read_file("/etc/fstab")
self.addCleanup(utils.write_file, "/etc/fstab", fstab)
succ = BlockDev.fs_vfat_mkfs(self.loop_dev, None)
self.assertTrue(succ)
tmp = tempfile.mkdtemp(prefix="libblockdev.", suffix="mount_fstab_user_test")
self.addCleanup(os.rmdir, tmp)
utils.write_file("/etc/fstab", "%s %s vfat defaults,users 0 0\n" % (self.loop_dev, tmp))
uid, gid = self._add_user()
self.addCleanup(self._remove_user)
# try to mount and unmount the device as the user
self.addCleanup(utils.umount, self.loop_dev)
succ = BlockDev.fs_mount(device=self.loop_dev, run_as_uid=uid, run_as_gid=gid)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_unmount(self.loop_dev, run_as_uid=uid, run_as_gid=gid)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
# remove the 'users' option
utils.write_file("/etc/fstab", "%s %s vfat defaults 0 0\n" % (self.loop_dev, tmp))
# try to mount and unmount the device as the user --> should fail now
with self.assertRaises(GLib.GError):
BlockDev.fs_mount(device=self.loop_dev, run_as_uid=uid, run_as_gid=gid)
self.assertFalse(os.path.ismount(tmp))
# now mount as root to test unmounting
self.addCleanup(utils.umount, self.loop_dev)
succ = BlockDev.fs_mount(device=self.loop_dev)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
with self.assertRaises(GLib.GError):
BlockDev.fs_unmount(self.loop_dev, run_as_uid=uid, run_as_gid=gid)
self.assertTrue(os.path.ismount(tmp))
def test_mount_nilfs(self):
""" Test basic mounting and unmounting with NILFS2 filesystem"""
# using NILFS2 because it uses a helper program (mount.nilfs2) and libmount
# behaves differently because of that
if not self.nilfs2_avail:
self.skipTest("skipping NILFS mount test: not available")
succ = BlockDev.fs_nilfs2_mkfs(self.loop_dev, None)
self.assertTrue(succ)
tmp = tempfile.mkdtemp(prefix="libblockdev.", suffix="mount_test")
self.addCleanup(os.rmdir, tmp)
self.addCleanup(utils.umount, self.loop_dev)
succ = BlockDev.fs_mount(self.loop_dev, tmp, "nilfs2", None)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_unmount(self.loop_dev, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
mnt = BlockDev.fs_get_mountpoint(self.loop_dev)
self.assertIsNone(mnt)
# mount again to test unmount using the mountpoint
succ = BlockDev.fs_mount(self.loop_dev, tmp, None, None)
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
succ = BlockDev.fs_unmount(tmp, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
# mount with some options
succ = BlockDev.fs_mount(self.loop_dev, tmp, "nilfs2", "ro")
self.assertTrue(succ)
self.assertTrue(os.path.ismount(tmp))
_ret, out, _err = utils.run_command("grep %s /proc/mounts" % tmp)
self.assertTrue(out)
self.assertIn("ro", out)
succ = BlockDev.fs_unmount(self.loop_dev, False, False, None)
self.assertTrue(succ)
self.assertFalse(os.path.ismount(tmp))
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