func (s *LoopUtilSuite) TestDetachLoopDevicesMultiple(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond(
"/dev/loop0: [0021]:7504142 (/tmp/test1.dat)\n"+
"/dev/loop1: [002f]:7504143 (/tmp/test2.dat (deleted))\n"+
"/dev/loop2: [002a]:7504144 (/tmp/test3.dat)",
nil,
)
commands.expect("losetup", "-d", "/dev/loop0")
commands.expect("losetup", "-d", "/dev/loop2")
var statted []string
stat := func(path string) (os.FileInfo, error) {
statted = append(statted, path)
switch path {
case "/tmp/test1.dat":
return mockFileInfo{inode: 7504142}, nil
case "/tmp/test3.dat":
return mockFileInfo{inode: 7504144}, nil
}
return nil, os.ErrNotExist
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, mockFileInfoInode)
err := m.DetachLoopDevices("", "")
c.Assert(err, jc.ErrorIsNil)
c.Assert(statted, jc.DeepEquals, []string{"/tmp/test1.dat", "/tmp/test2.dat", "/tmp/test3.dat"})
}
func (s *LoopUtilSuite) TestDetachLoopDevicesListBadInode(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("/dev/loop0: [0]:99999999999999999999999 (woop)", nil)
m := looputil.NewTestLoopDeviceManager(commands.run, nil, nil)
err := m.DetachLoopDevices("", "")
c.Assert(err, gc.ErrorMatches, `listing loop devices: parsing inode: strconv.ParseUint: parsing "99999999999999999999999": value out of range`)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesListBadOutput(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("bad output", nil)
m := looputil.NewTestLoopDeviceManager(commands.run, nil, nil)
err := m.DetachLoopDevices("", "")
c.Assert(err, gc.ErrorMatches, `listing loop devices: cannot parse loop device info from "bad output"`)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesListError(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("", errors.New("badness"))
m := looputil.NewTestLoopDeviceManager(commands.run, nil, nil)
err := m.DetachLoopDevices("", "")
c.Assert(err, gc.ErrorMatches, "listing loop devices: badness")
}
func (s *LoopUtilSuite) TestDetachLoopDevicesNone(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a")
m := looputil.NewTestLoopDeviceManager(commands.run, nil, nil)
err := m.DetachLoopDevices("", "")
c.Assert(err, jc.ErrorIsNil)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesInodeMismatch(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("/dev/loop0: [0021]:7504142 (/tmp/test.dat)", nil)
stat := func(path string) (os.FileInfo, error) {
return mockFileInfo{inode: 123}, nil
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, mockFileInfoInode)
err := m.DetachLoopDevices("", "")
c.Assert(err, jc.ErrorIsNil)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesStatError(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("/dev/loop0: [0021]:7504142 (/tmp/test.dat)", nil)
stat := func(path string) (os.FileInfo, error) {
return nil, errors.Errorf("stat fails for %q", path)
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, nil)
err := m.DetachLoopDevices("", "")
c.Assert(err, gc.ErrorMatches, `querying backing file: stat fails for "/tmp/test.dat"`)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesNotFound(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("/dev/loop0: [0021]:7504142 (/tmp/test.dat)", nil)
stat := func(string) (os.FileInfo, error) {
return nil, os.ErrNotExist
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, nil)
err := m.DetachLoopDevices("", "")
c.Assert(err, jc.ErrorIsNil)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesDetachError(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("/dev/loop0: [0021]:7504142 (/tmp/test.dat)", nil)
commands.expect("losetup", "-d", "/dev/loop0").respond("", errors.New("oh noes"))
stat := func(path string) (os.FileInfo, error) {
return mockFileInfo{inode: 7504142}, nil
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, mockFileInfoInode)
err := m.DetachLoopDevices("", "")
c.Assert(err, gc.ErrorMatches, `detaching loop device "/dev/loop0": oh noes`)
}
func (s *LoopUtilSuite) TestDetachLoopDevicesAlternativeRoot(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond("/dev/loop0: [0021]:7504142 (/tmp/test.dat)", nil)
var statted string
stat := func(path string) (os.FileInfo, error) {
statted = path
return nil, os.ErrNotExist
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, mockFileInfoInode)
err := m.DetachLoopDevices("/var/lib/lxc/mycontainer/rootfs", "")
c.Assert(err, jc.ErrorIsNil)
c.Assert(statted, gc.Equals, "/var/lib/lxc/mycontainer/rootfs/tmp/test.dat")
}
func (s *LoopUtilSuite) TestDetachLoopDevicesAlternativeRootWithPrefix(c *gc.C) {
commands := &mockRunCommand{c: c}
defer commands.assertDrained()
commands.expect("losetup", "-a").respond(
"/dev/loop0: [0021]:7504142 (/var/lib/juju/storage/loop/volume-0-0)\n"+
"/dev/loop1: [002f]:7504143 (/some/random/loop/device)",
nil,
)
commands.expect("losetup", "-d", "/dev/loop0")
var statted []string
stat := func(path string) (os.FileInfo, error) {
statted = append(statted, path)
return mockFileInfo{inode: 7504142}, nil
}
m := looputil.NewTestLoopDeviceManager(commands.run, stat, mockFileInfoInode)
err := m.DetachLoopDevices("/var/lib/lxc/mycontainer/rootfs", "/var/lib/juju")
c.Assert(err, jc.ErrorIsNil)
c.Assert(statted, jc.DeepEquals, []string{
"/var/lib/lxc/mycontainer/rootfs/var/lib/juju/storage/loop/volume-0-0",
})
}
