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// Copyright 2021 Canonical Ltd.
// Licensed under the LGPLv3 with static-linking exception.
// See LICENCE file for details.
package linux
import (
"errors"
"os"
"path/filepath"
"syscall"
efi "github.com/canonical/go-efilib"
"golang.org/x/sys/unix"
. "gopkg.in/check.v1"
)
type FilepathMockMixin struct{}
func (s *FilepathMockMixin) MockFilepathEvalSymlinks(m map[string]string) (restore func()) {
orig := filepathEvalSymlinks
filepathEvalSymlinks = func(path string) (string, error) {
p, ok := m[path]
switch {
case ok && p == "":
return "", &os.PathError{Op: "lstat", Path: filepath.Dir(path), Err: syscall.EEXIST}
case ok:
return p, nil
default:
return path, nil
}
}
return func() {
filepathEvalSymlinks = orig
}
}
func (s *FilepathMockMixin) MockUnixStat(m map[string]unix.Stat_t) (restore func()) {
orig := unixStat
unixStat = func(path string, st *unix.Stat_t) error {
if s, ok := m[path]; ok {
*st = s
return nil
}
return orig(path, st)
}
return func() {
unixStat = orig
}
}
type filepathSuite struct {
FilepathMockMixin
TarFileMixin
}
var _ = Suite(&filepathSuite{})
func (s *filepathSuite) TestScanBlockDeviceMounts(c *C) {
restore := MockMountsPath("testdata/mounts-nvme")
defer restore()
mounts, err := scanBlockDeviceMounts()
c.Check(err, IsNil)
c.Check(mounts, DeepEquals, []*mountPoint{
{dev: unix.Mkdev(253, 1), root: "/", mountDir: "/", mountSource: "/dev/mapper/vgubuntu-root"},
{dev: unix.Mkdev(259, 2), root: "/", mountDir: "/boot", mountSource: "/dev/nvme0n1p2"},
{dev: unix.Mkdev(259, 1), root: "/", mountDir: "/boot/efi", mountSource: "/dev/nvme0n1p1"},
{dev: unix.Mkdev(7, 1), root: "/", mountDir: "/snap/core/11993", mountSource: "/dev/loop1"},
{dev: unix.Mkdev(7, 2), root: "/", mountDir: "/snap/gnome-3-38-2004/87", mountSource: "/dev/loop2"},
{dev: unix.Mkdev(7, 3), root: "/", mountDir: "/snap/snap-store/558", mountSource: "/dev/loop3"},
{dev: unix.Mkdev(7, 4), root: "/", mountDir: "/snap/gtk-common-themes/1519", mountSource: "/dev/loop4"},
{dev: unix.Mkdev(259, 1), root: "/EFI", mountDir: "/efi", mountSource: "/dev/nvme0n1p1"}})
}
func (s *filepathSuite) TestGetFileMountPoint(c *C) {
restore := s.MockFilepathEvalSymlinks(map[string]string{})
defer restore()
restore = MockMountsPath("testdata/mounts-nvme")
defer restore()
restore = s.MockUnixStat(map[string]unix.Stat_t{
"/boot/efi/EFI/ubuntu/shimx64.efi": unix.Stat_t{Dev: unix.Mkdev(259, 1)},
})
defer restore()
mount, err := getFileMountPoint("/boot/efi/EFI/ubuntu/shimx64.efi")
c.Check(err, IsNil)
c.Check(mount, DeepEquals, &mountPoint{dev: unix.Mkdev(259, 1), root: "/", mountDir: "/boot/efi", mountSource: "/dev/nvme0n1p1"})
}
func (s *filepathSuite) TestGetFileMountPointBindMount(c *C) {
restore := s.MockFilepathEvalSymlinks(map[string]string{})
defer restore()
restore = MockMountsPath("testdata/mounts-nvme")
defer restore()
restore = s.MockUnixStat(map[string]unix.Stat_t{
"/efi/ubuntu/shimx64.efi": unix.Stat_t{Dev: unix.Mkdev(259, 1)},
})
defer restore()
mount, err := getFileMountPoint("/efi/ubuntu/shimx64.efi")
c.Check(err, IsNil)
c.Check(mount, DeepEquals, &mountPoint{dev: unix.Mkdev(259, 1), root: "/EFI", mountDir: "/efi", mountSource: "/dev/nvme0n1p1"})
}
func (s *filepathSuite) TestNewFilePath(c *C) {
restore := s.MockFilepathEvalSymlinks(map[string]string{})
defer restore()
restore = MockMountsPath("testdata/mounts-nvme")
defer restore()
restore = s.MockUnixStat(map[string]unix.Stat_t{
"/boot/efi/EFI/ubuntu/shimx64.efi": unix.Stat_t{Dev: unix.Mkdev(259, 1)},
})
defer restore()
sysfs := filepath.Join(s.UnpackTar(c, "testdata/sys.tar"), "sys")
restore = MockSysfsPath(sysfs)
defer restore()
path, err := newFilePath("/boot/efi/EFI/ubuntu/shimx64.efi")
c.Check(err, IsNil)
c.Check(path, DeepEquals, &filePath{
dev: dev{
sysfsPath: filepath.Join(sysfs, "devices/pci0000:00/0000:00:1d.0/0000:3d:00.0/nvme/nvme0/nvme0n1"),
devPath: "/dev/nvme0n1",
part: 1},
path: "/EFI/ubuntu/shimx64.efi"})
}
func (s *filepathSuite) TestNewFilePathBindMount(c *C) {
restore := s.MockFilepathEvalSymlinks(map[string]string{})
defer restore()
restore = MockMountsPath("testdata/mounts-nvme")
defer restore()
restore = s.MockUnixStat(map[string]unix.Stat_t{
"/efi/ubuntu/shimx64.efi": unix.Stat_t{Dev: unix.Mkdev(259, 1)},
})
defer restore()
sysfs := filepath.Join(s.UnpackTar(c, "testdata/sys.tar"), "sys")
restore = MockSysfsPath(sysfs)
defer restore()
path, err := newFilePath("/efi/ubuntu/shimx64.efi")
c.Check(err, IsNil)
c.Check(path, DeepEquals, &filePath{
dev: dev{
sysfsPath: filepath.Join(sysfs, "devices/pci0000:00/0000:00:1d.0/0000:3d:00.0/nvme/nvme0/nvme0n1"),
devPath: "/dev/nvme0n1",
part: 1},
path: "/EFI/ubuntu/shimx64.efi"})
}
func (s *filepathSuite) TestNewFilePathSymlink(c *C) {
restore := s.MockFilepathEvalSymlinks(map[string]string{"/foo/bar/shimx64.efi": "/efi/ubuntu/shimx64.efi"})
defer restore()
restore = MockMountsPath("testdata/mounts-nvme")
defer restore()
restore = s.MockUnixStat(map[string]unix.Stat_t{
"/efi/ubuntu/shimx64.efi": unix.Stat_t{Dev: unix.Mkdev(259, 1)},
})
defer restore()
sysfs := filepath.Join(s.UnpackTar(c, "testdata/sys.tar"), "sys")
restore = MockSysfsPath(sysfs)
defer restore()
path, err := newFilePath("/foo/bar/shimx64.efi")
c.Check(err, IsNil)
c.Check(path, DeepEquals, &filePath{
dev: dev{
sysfsPath: filepath.Join(sysfs, "devices/pci0000:00/0000:00:1d.0/0000:3d:00.0/nvme/nvme0/nvme0n1"),
devPath: "/dev/nvme0n1",
part: 1},
path: "/EFI/ubuntu/shimx64.efi"})
}
func (s *filepathSuite) TestNewFilePathNotPartitioned(c *C) {
restore := s.MockFilepathEvalSymlinks(map[string]string{})
defer restore()
restore = MockMountsPath("testdata/mounts-nvme")
defer restore()
restore = s.MockUnixStat(map[string]unix.Stat_t{
"/snap/core/11993/bin/ls": unix.Stat_t{Dev: unix.Mkdev(7, 1)},
})
defer restore()
sysfs := filepath.Join(s.UnpackTar(c, "testdata/sys.tar"), "sys")
restore = MockSysfsPath(sysfs)
defer restore()
path, err := newFilePath("/snap/core/11993/bin/ls")
c.Check(err, IsNil)
c.Check(path, DeepEquals, &filePath{
dev: dev{
sysfsPath: filepath.Join(sysfs, "devices/virtual/block/loop1"),
devPath: "/dev/loop1",
part: 0},
path: "/bin/ls"})
}
func (s *filepathSuite) TestNewDevicePathBuilder(c *C) {
sysfs := filepath.Join(s.UnpackTar(c, "testdata/sys.tar"), "sys")
restore := MockSysfsPath(sysfs)
defer restore()
dev := &dev{sysfsPath: filepath.Join(sysfs, "devices/pci0000:00/0000:00:1d.0/0000:3d:00.0/nvme/nvme0/nvme0n1")}
builder, err := newDevicePathBuilder(dev)
c.Check(err, IsNil)
c.Check(builder, DeepEquals, &devicePathBuilder{
devicePathBuilderState: devicePathBuilderState{
remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}})
}
func (s *filepathSuite) TestDevicePathBuilderStateSysfsComponentsRemaining(c *C) {
state := &devicePathBuilderState{remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}
c.Check(state.SysfsComponentsRemaining(), Equals, 6)
state.remaining = []string{"0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}
c.Check(state.SysfsComponentsRemaining(), Equals, 4)
}
func (s *filepathSuite) TestDevicePathBuilderStatePeekUnhandledSysfsComponents(c *C) {
state := &devicePathBuilderState{remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}
c.Check(state.PeekUnhandledSysfsComponents(1), Equals, "pci0000:00")
c.Check(state.PeekUnhandledSysfsComponents(2), Equals, "pci0000:00/0000:00:1d.0")
c.Check(state.PeekUnhandledSysfsComponents(-1), Equals, "pci0000:00/0000:00:1d.0/0000:3d:00.0/nvme/nvme0/nvme0n1")
}
func (s *filepathSuite) TestDevicePathBuilderStateSysfsPath(c *C) {
state := &devicePathBuilderState{processed: []string{"pci0000:00"}}
c.Check(state.SysfsPath(), Equals, "/sys/devices/pci0000:00")
state.processed = append(state.processed, "0000:00:1d.0")
c.Check(state.SysfsPath(), Equals, "/sys/devices/pci0000:00/0000:00:1d.0")
}
func (s *filepathSuite) TestDevicePathBuilderStateAdvanceSysfsPath(c *C) {
state := &devicePathBuilderState{remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}
state.AdvanceSysfsPath(1)
c.Check(state.processed, DeepEquals, []string{"pci0000:00"})
c.Check(state.remaining, DeepEquals, []string{"0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"})
state.AdvanceSysfsPath(2)
c.Check(state.processed, DeepEquals, []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0"})
c.Check(state.remaining, DeepEquals, []string{"nvme", "nvme0", "nvme0n1"})
}
func (s *filepathSuite) TestDevicePathBuilderDone(c *C) {
builder := &devicePathBuilder{
devicePathBuilderState: devicePathBuilderState{remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}}
c.Check(builder.done(), Equals, false)
builder.remaining = []string{}
c.Check(builder.done(), Equals, true)
}
func (s *filepathSuite) TestDevicePathBuilderProcessNextComponent(c *C) {
builder := &devicePathBuilder{
devicePathBuilderState: devicePathBuilderState{
remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}}
hid, _ := efi.NewEISAID("PNP", 0x0a03)
var skipped int
skipHandler := func(state *devicePathBuilderState) error {
skipped += 1
state.AdvanceSysfsPath(2)
return errSkipDevicePathNodeHandler
}
realHandler := func(state *devicePathBuilderState) error {
state.Interface = interfaceTypePCI
state.Path = append(state.Path, &efi.ACPIDevicePathNode{HID: hid})
state.AdvanceSysfsPath(1)
return nil
}
restore := MockDevicePathNodeHandlers(map[interfaceType][]registeredDpHandler{
interfaceTypeUnknown: []registeredDpHandler{
{name: "skip1", fn: skipHandler},
{name: "skip2", fn: skipHandler},
{name: "acpi", fn: realHandler}},
interfaceTypePCI: []registeredDpHandler{
{name: "pci", fn: skipHandler}}})
defer restore()
c.Check(builder.ProcessNextComponent(), IsNil)
c.Check(skipped, Equals, 2)
c.Check(builder.Interface, Equals, interfaceTypePCI)
c.Check(builder.Path, DeepEquals, efi.DevicePath{&efi.ACPIDevicePathNode{HID: hid}})
c.Check(builder.remaining, DeepEquals, []string{"0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"})
c.Check(builder.processed, DeepEquals, []string{"pci0000:00"})
}
func (s *filepathSuite) TestDevicePathBuilderProcessNextComponentUnhandled(c *C) {
hid, _ := efi.NewEISAID("PNP", 0x0a03)
builder := &devicePathBuilder{
devicePathBuilderState: devicePathBuilderState{
Interface: interfaceTypePCI,
Path: efi.DevicePath{&efi.ACPIDevicePathNode{HID: hid}},
processed: []string{"pci0000:00"},
remaining: []string{"0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}}
var skipped int
skipHandler := func(_ *devicePathBuilderState) error {
skipped += 1
return errSkipDevicePathNodeHandler
}
restore := MockDevicePathNodeHandlers(map[interfaceType][]registeredDpHandler{
interfaceTypeUnknown: []registeredDpHandler{
{name: "acpi-skip", fn: skipHandler}},
interfaceTypePCI: []registeredDpHandler{
{name: "skip1", fn: skipHandler},
{name: "skip2", fn: skipHandler}}})
defer restore()
c.Check(func() { builder.ProcessNextComponent() }, PanicMatches, "all handlers skipped handling interface type 1")
c.Check(skipped, Equals, 2)
}
func (s *filepathSuite) TestDevicePathBuilderProcessNextComponentUnhandledRoot(c *C) {
builder := &devicePathBuilder{
devicePathBuilderState: devicePathBuilderState{
Interface: interfaceTypeUnknown,
remaining: []string{"pci0000:00", "0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}}
var skipped int
skipHandler := func(state *devicePathBuilderState) error {
skipped += 1
state.Interface = interfaceTypePCI
return errSkipDevicePathNodeHandler
}
restore := MockDevicePathNodeHandlers(map[interfaceType][]registeredDpHandler{
interfaceTypeUnknown: []registeredDpHandler{
{name: "acpi-skip", fn: skipHandler}},
interfaceTypePCI: []registeredDpHandler{
{name: "skip1", fn: skipHandler},
{name: "skip2", fn: skipHandler}}})
defer restore()
c.Check(builder.ProcessNextComponent(), ErrorMatches, "unsupported device: unhandled root node")
c.Check(skipped, Equals, 1)
c.Check(builder.Interface, Equals, interfaceTypeUnknown)
}
func (s *filepathSuite) TestDevicePathBuilderProcessNextComponentError(c *C) {
hid, _ := efi.NewEISAID("PNP", 0x0a03)
builder := &devicePathBuilder{
devicePathBuilderState: devicePathBuilderState{
Interface: interfaceTypePCI,
Path: efi.DevicePath{&efi.ACPIDevicePathNode{HID: hid}},
processed: []string{"pci0000:00"},
remaining: []string{"0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"}}}
handler := func(state *devicePathBuilderState) error {
state.AdvanceSysfsPath(1)
return errors.New("error")
}
restore := MockDevicePathNodeHandlers(map[interfaceType][]registeredDpHandler{
interfaceTypePCI: []registeredDpHandler{
{name: "pci", fn: handler}}})
defer restore()
c.Check(builder.ProcessNextComponent(), ErrorMatches, "\\[handler pci\\]: error")
c.Check(builder.remaining, DeepEquals, []string{"0000:00:1d.0", "0000:3d:00.0", "nvme", "nvme0", "nvme0n1"})
c.Check(builder.processed, DeepEquals, []string{"pci0000:00"})
}
|
