Example #1
0
// setNextBoot will schedule the given os or kernel snap to be used in
// the next boot
func setNextBoot(s *SnapPart) error {
	if s.m.Type != snap.TypeOS && s.m.Type != snap.TypeKernel {
		return nil
	}

	bootloader, err := findBootloader()
	if err != nil {
		return fmt.Errorf("can not set next boot: %s", err)
	}

	var bootvar string
	switch s.m.Type {
	case snap.TypeOS:
		bootvar = "snappy_os"
	case snap.TypeKernel:
		bootvar = "snappy_kernel"
	}
	blobName := filepath.Base(squashfs.BlobPath(s.basedir))
	if err := bootloader.SetBootVar(bootvar, blobName); err != nil {
		return err
	}

	if err := bootloader.SetBootVar("snappy_mode", "try"); err != nil {
		return err
	}

	return nil
}
Example #2
0
func (s *SnapPart) remove(inter interacter) (err error) {
	if err := s.deactivate(false, inter); err != nil && err != ErrSnapNotActive {
		return err
	}

	// ensure mount unit stops
	if err := s.m.removeSquashfsMount(s.basedir, inter); err != nil {
		return err
	}

	err = os.RemoveAll(s.basedir)
	if err != nil {
		return err
	}

	// best effort(?)
	os.Remove(filepath.Dir(s.basedir))

	// remove the snap
	if err := os.RemoveAll(squashfs.BlobPath(s.basedir)); err != nil {
		return err
	}

	// remove the kernel assets (if any)
	if s.m.Type == snap.TypeKernel {
		if err := removeKernelAssets(s, inter); err != nil {
			logger.Noticef("removing kernel assets failed with %s", err)
		}
	}

	return nil
}
Example #3
0
// extractKernelAssets extracts kernel/initrd/dtb data from the given
// SnapPart to a versionized bootloader directory so that the bootloader
// can use it.
func extractKernelAssets(s *SnapFile, inter progress.Meter, flags InstallFlags) error {
	if s.m.Type != snap.TypeKernel {
		return fmt.Errorf("can not extract kernel assets from snap type %q", s.Type())
	}

	bootloader, err := findBootloader()
	if err != nil {
		return fmt.Errorf("can not extract kernel assets: %s", err)
	}

	// check if we are on a "grub" system. if so, no need to unpack
	// the kernel
	if oem, err := getGadget(); err == nil {
		if oem.Gadget.Hardware.Bootloader == "grub" {
			return nil
		}
	}

	// FIXME: feels wrong to use the instdir here, need something better
	//
	// now do the kernel specific bits
	blobName := filepath.Base(squashfs.BlobPath(s.instdir))
	dstDir := filepath.Join(bootloader.Dir(), blobName)
	if err := os.MkdirAll(dstDir, 0755); err != nil {
		return err
	}
	dir, err := os.Open(dstDir)
	if err != nil {
		return err
	}
	defer dir.Close()

	for _, src := range []string{s.m.Kernel, s.m.Initrd} {
		if src == "" {
			continue
		}
		if err := s.deb.Unpack(src, dstDir); err != nil {
			return err
		}
		src = filepath.Join(dstDir, src)
		dst := filepath.Join(dstDir, dropVersionSuffix(src))
		if err := os.Rename(src, dst); err != nil {
			return err
		}
		if err := dir.Sync(); err != nil {
			return err
		}
	}
	if s.m.Dtbs != "" {
		src := filepath.Join(s.m.Dtbs, "*")
		dst := dstDir
		if err := s.deb.Unpack(src, dst); err != nil {
			return err
		}
	}

	return dir.Sync()
}
Example #4
0
// Uninstall removes the given local snap from the system.
//
// It returns an error on failure
func (o *Overlord) Uninstall(s *SnapPart, meter progress.Meter) error {
	// Gadget snaps should not be removed as they are a key
	// building block for Gadgets. Prunning non active ones
	// is acceptible.
	if s.m.Type == snap.TypeGadget && s.IsActive() {
		return ErrPackageNotRemovable
	}

	// You never want to remove an active kernel or OS
	if (s.m.Type == snap.TypeKernel || s.m.Type == snap.TypeOS) && s.IsActive() {
		return ErrPackageNotRemovable
	}

	if IsBuiltInSoftware(s.Name()) && s.IsActive() {
		return ErrPackageNotRemovable
	}

	deps, err := s.DependentNames()
	if err != nil {
		return err
	}
	if len(deps) != 0 {
		return ErrFrameworkInUse(deps)
	}

	if err := s.deactivate(false, meter); err != nil && err != ErrSnapNotActive {
		return err
	}

	// ensure mount unit stops
	if err := removeSquashfsMount(s.m, s.basedir, meter); err != nil {
		return err
	}

	err = os.RemoveAll(s.basedir)
	if err != nil {
		return err
	}

	// best effort(?)
	os.Remove(filepath.Dir(s.basedir))

	// remove the snap
	if err := os.RemoveAll(squashfs.BlobPath(s.basedir)); err != nil {
		return err
	}

	// remove the kernel assets (if any)
	if s.m.Type == snap.TypeKernel {
		if err := removeKernelAssets(s, meter); err != nil {
			logger.Noticef("removing kernel assets failed with %s", err)
		}
	}

	return RemoveAllHWAccess(QualifiedName(s))
}
Example #5
0
// removeKernelAssets removes the unpacked kernel/initrd for the given
// kernel snap
func removeKernelAssets(s *SnapPart, inter interacter) error {
	if s.m.Type != snap.TypeKernel {
		return fmt.Errorf("can not remove kernel assets from snap type %q", s.Type())
	}

	bootloader, err := findBootloader()
	if err != nil {
		return fmt.Errorf("no not remove kernel assests: %s", err)
	}

	// remove the kernel blob
	blobName := filepath.Base(squashfs.BlobPath(s.basedir))
	dstDir := filepath.Join(bootloader.Dir(), blobName)
	if err := os.RemoveAll(dstDir); err != nil {
		return err
	}

	return nil
}
Example #6
0
func (m *packageYaml) addSquashfsMount(baseDir string, inhibitHooks bool, inter interacter) error {
	squashfsPath := stripGlobalRootDir(squashfs.BlobPath(baseDir))
	whereDir := stripGlobalRootDir(baseDir)

	sysd := systemd.New(dirs.GlobalRootDir, inter)
	mountUnitName, err := sysd.WriteMountUnitFile(m.Name, squashfsPath, whereDir)
	if err != nil {
		return err
	}

	// we always enable the mount unit even in inhibit hooks
	if err := sysd.Enable(mountUnitName); err != nil {
		return err
	}

	if !inhibitHooks {
		return sysd.Start(mountUnitName)
	}

	return nil
}
Example #7
0
func kernelOrOsRebootRequired(s *SnapPart) bool {
	if s.m.Type != snap.TypeKernel && s.m.Type != snap.TypeOS {
		return false
	}

	bootloader, err := findBootloader()
	if err != nil {
		logger.Noticef("can not get boot settings: %s", err)
		return false
	}

	var nextBoot, goodBoot string
	switch s.m.Type {
	case snap.TypeKernel:
		nextBoot = "snappy_kernel"
		goodBoot = "snappy_good_kernel"
	case snap.TypeOS:
		nextBoot = "snappy_os"
		goodBoot = "snappy_good_os"
	}

	nextBootVer, err := bootloader.GetBootVar(nextBoot)
	if err != nil {
		return false
	}
	goodBootVer, err := bootloader.GetBootVar(goodBoot)
	if err != nil {
		return false
	}

	squashfsName := filepath.Base(stripGlobalRootDir(squashfs.BlobPath(s.basedir)))
	if nextBootVer == squashfsName && goodBootVer != nextBootVer {
		return true
	}

	return false
}