Golang snapstate.SnapState类代码示例

func (s *linkSnapSuite) TestDoLinkSnapSuccess(c *C) {
	s.state.Lock()
	t := s.state.NewTask("link-snap", "test")
	t.Set("snap-setup", &snapstate.SnapSetup{
		SideInfo: &snap.SideInfo{
			RealName: "foo",
			Revision: snap.R(33),
		},
		Channel: "beta",
	})
	s.state.NewChange("dummy", "...").AddTask(t)

	s.state.Unlock()

	s.snapmgr.Ensure()
	s.snapmgr.Wait()

	s.state.Lock()
	defer s.state.Unlock()
	var snapst snapstate.SnapState
	err := snapstate.Get(s.state, "foo", &snapst)
	c.Assert(err, IsNil)

	typ, err := snapst.Type()
	c.Check(err, IsNil)
	c.Check(typ, Equals, snap.TypeApp)

	c.Check(snapst.Active, Equals, true)
	c.Check(snapst.Sequence, HasLen, 1)
	c.Check(snapst.Current, Equals, snap.R(33))
	c.Check(snapst.Channel, Equals, "beta")
	c.Check(t.Status(), Equals, state.DoneStatus)
	c.Check(s.stateBackend.restartRequested, Equals, false)
}

func mapLocal(localSnap *snap.Info, snapst *snapstate.SnapState) map[string]interface{} {
	status := "installed"
	if snapst.Active && localSnap.Revision == snapst.Current {
		status = "active"
	}

	apps := make([]appJSON, 0, len(localSnap.Apps))
	for _, app := range localSnap.Apps {
		apps = append(apps, appJSON{
			Name: app.Name,
		})
	}

	return map[string]interface{}{
		"description":    localSnap.Description(),
		"developer":      localSnap.Developer,
		"icon":           snapIcon(localSnap),
		"id":             localSnap.SnapID,
		"install-date":   snapDate(localSnap),
		"installed-size": localSnap.Size,
		"name":           localSnap.Name(),
		"revision":       localSnap.Revision,
		"status":         status,
		"summary":        localSnap.Summary(),
		"type":           string(localSnap.Type),
		"version":        localSnap.Version,
		"channel":        localSnap.Channel,
		"confinement":    localSnap.Confinement,
		"devmode":        snapst.DevMode(),
		"trymode":        snapst.TryMode(),
		"private":        localSnap.Private,
		"apps":           apps,
		"broken":         localSnap.Broken,
	}
}

func (m *InterfaceManager) undoSetupProfiles(task *state.Task, tomb *tomb.Tomb) error {
	st := task.State()
	st.Lock()
	defer st.Unlock()

	ss, err := snapstate.TaskSnapSetup(task)
	if err != nil {
		return err
	}
	snapName := ss.Name()

	// Get the name from SnapSetup and use it to find the current SideInfo
	// about the snap, if there is one.
	var snapst snapstate.SnapState
	err = snapstate.Get(st, snapName, &snapst)
	if err != nil && err != state.ErrNoState {
		return err
	}
	sideInfo := snapst.CurrentSideInfo()
	if sideInfo == nil {
		// The snap was not installed before so undo should remove security profiles.
		return m.removeProfilesForSnap(task, tomb, snapName)
	} else {
		// The snap was installed before so undo should setup the old security profiles.
		snapInfo, err := snap.ReadInfo(snapName, sideInfo)
		if err != nil {
			return err
		}
		return m.setupProfilesForSnap(task, tomb, snapInfo, snapst.DevMode)
	}
}

func (m *InterfaceManager) setupAffectedSnaps(task *state.Task, affectingSnap string, affectedSnaps []string) error {
	st := task.State()

	// Setup security of the affected snaps.
	for _, affectedSnapName := range affectedSnaps {
		// the snap that triggered the change needs to be skipped
		if affectedSnapName == affectingSnap {
			continue
		}
		var snapst snapstate.SnapState
		if err := snapstate.Get(st, affectedSnapName, &snapst); err != nil {
			return err
		}
		affectedSnapInfo, err := snapst.CurrentInfo()
		if err != nil {
			return err
		}
		snap.AddImplicitSlots(affectedSnapInfo)
		opts := confinementOptions(snapst.Flags)
		if err := setupSnapSecurity(task, affectedSnapInfo, opts, m.repo); err != nil {
			return err
		}
	}
	return nil
}

func (m *InterfaceManager) doDisconnect(task *state.Task, _ *tomb.Tomb) error {
	st := task.State()
	st.Lock()
	defer st.Unlock()

	plugRef, slotRef, err := getPlugAndSlotRefs(task)
	if err != nil {
		return err
	}

	conns, err := getConns(st)
	if err != nil {
		return err
	}

	var affectedConns []interfaces.ConnRef
	if plugRef.Snap != "" && plugRef.Name != "" && slotRef.Snap != "" && slotRef.Name != "" {
		if err := m.repo.Disconnect(plugRef.Snap, plugRef.Name, slotRef.Snap, slotRef.Name); err != nil {
			return err
		}
		affectedConns = []interfaces.ConnRef{{plugRef, slotRef}}
	} else if plugRef.Name != "" && slotRef.Snap == "" && slotRef.Name == "" {
		// NOTE: plugRef.Snap can be either empty or not, Connected handles both
		affectedConns, err = m.repo.Connected(plugRef.Snap, plugRef.Name)
		if err != nil {
			return err
		}
		m.repo.DisconnectAll(affectedConns)
	} else if plugRef.Snap == "" && plugRef.Name == "" && slotRef.Name != "" {
		// Symmetrically, slotRef.Snap can be either empty or not
		affectedConns, err = m.repo.Connected(slotRef.Snap, slotRef.Name)
		if err != nil {
			return err
		}
		m.repo.DisconnectAll(affectedConns)
	} else {
		return fmt.Errorf("internal error, unhandled disconnect case plug: %q, slot: %q", plugRef, slotRef)
	}
	affectedSnaps := snapNamesFromConns(affectedConns)
	for _, snapName := range affectedSnaps {
		var snapst snapstate.SnapState
		if err := snapstate.Get(st, snapName, &snapst); err != nil {
			return err
		}
		snapInfo, err := snapst.CurrentInfo()
		if err != nil {
			return err
		}
		opts := confinementOptions(snapst.Flags)
		if err := setupSnapSecurity(task, snapInfo, opts, m.repo); err != nil {
			return &state.Retry{}
		}
	}
	for _, conn := range affectedConns {
		delete(conns, conn.ID())
	}

	setConns(st, conns)
	return nil
}

func (s *interfaceManagerSuite) mockUpdatedSnap(c *C, yamlText string, revision int) *snap.Info {
	sideInfo := &snap.SideInfo{Revision: snap.R(revision)}
	snapInfo := snaptest.MockSnap(c, yamlText, "", sideInfo)
	sideInfo.RealName = snapInfo.Name()

	s.state.Lock()
	defer s.state.Unlock()

	// Put the new revision (stored in SideInfo) into the state
	var snapst snapstate.SnapState
	err := snapstate.Get(s.state, snapInfo.Name(), &snapst)
	c.Assert(err, IsNil)
	snapst.Sequence = append(snapst.Sequence, sideInfo)
	snapstate.Set(s.state, snapInfo.Name(), &snapst)

	return snapInfo
}

// localSnapInfo returns the information about the current snap for the given name plus the SnapState with the active flag and other snap revisions.
func localSnapInfo(st *state.State, name string) (*snap.Info, *snapstate.SnapState, error) {
	st.Lock()
	defer st.Unlock()

	var snapst snapstate.SnapState
	err := snapstate.Get(st, name, &snapst)
	if err != nil && err != state.ErrNoState {
		return nil, nil, fmt.Errorf("cannot consult state: %v", err)
	}

	info, err := snapst.CurrentInfo()
	if err == snapstate.ErrNoCurrent {
		return nil, nil, errNoSnap
	}
	if err != nil {
		return nil, nil, fmt.Errorf("cannot read snap details: %v", err)
	}

	return info, &snapst, nil
}

func (s *linkSnapSuite) TestDoLinkSnapSuccessCoreRestarts(c *C) {
	restore := release.MockOnClassic(true)
	defer restore()

	s.state.Lock()
	si := &snap.SideInfo{
		RealName: "core",
		Revision: snap.R(33),
	}
	t := s.state.NewTask("link-snap", "test")
	t.Set("snap-setup", &snapstate.SnapSetup{
		SideInfo: si,
	})
	s.state.NewChange("dummy", "...").AddTask(t)

	s.state.Unlock()

	s.snapmgr.Ensure()
	s.snapmgr.Wait()

	s.state.Lock()
	defer s.state.Unlock()

	var snapst snapstate.SnapState
	err := snapstate.Get(s.state, "core", &snapst)
	c.Assert(err, IsNil)

	typ, err := snapst.Type()
	c.Check(err, IsNil)
	c.Check(typ, Equals, snap.TypeOS)

	c.Check(t.Status(), Equals, state.DoneStatus)
	c.Check(s.stateBackend.restartRequested, Equals, true)
	c.Check(t.Log(), HasLen, 1)
	c.Check(t.Log()[0], Matches, `.*INFO Requested daemon restart\.`)
}

func (m *InterfaceManager) doConnect(task *state.Task, _ *tomb.Tomb) error {
	st := task.State()
	st.Lock()
	defer st.Unlock()

	plugRef, slotRef, err := getPlugAndSlotRefs(task)
	if err != nil {
		return err
	}

	conns, err := getConns(st)
	if err != nil {
		return err
	}

	err = m.repo.Connect(plugRef.Snap, plugRef.Name, slotRef.Snap, slotRef.Name)
	if err != nil {
		return err
	}

	plug := m.repo.Plug(plugRef.Snap, plugRef.Name)
	var plugSnapst snapstate.SnapState
	if err := snapstate.Get(st, plugRef.Snap, &plugSnapst); err != nil {
		return err
	}
	slot := m.repo.Slot(slotRef.Snap, slotRef.Name)
	var slotSnapst snapstate.SnapState
	if err := snapstate.Get(st, slotRef.Snap, &slotSnapst); err != nil {
		return err
	}

	if err := setupSnapSecurity(task, plug.Snap, plugSnapst.DevModeAllowed(), m.repo); err != nil {
		return err
	}
	if err := setupSnapSecurity(task, slot.Snap, slotSnapst.DevModeAllowed(), m.repo); err != nil {
		return err
	}

	conns[connID(plugRef, slotRef)] = connState{Interface: plug.Interface}
	setConns(st, conns)

	return nil
}

func (m *InterfaceManager) doConnect(task *state.Task, _ *tomb.Tomb) error {
	st := task.State()
	st.Lock()
	defer st.Unlock()

	plugRef, slotRef, err := getPlugAndSlotRefs(task)
	if err != nil {
		return err
	}

	conns, err := getConns(st)
	if err != nil {
		return err
	}

	connRef, err := m.repo.ResolveConnect(plugRef.Snap, plugRef.Name, slotRef.Snap, slotRef.Name)
	if err != nil {
		return err
	}
	plug := m.repo.Plug(connRef.PlugRef.Snap, connRef.PlugRef.Name)
	if plug == nil {
		return fmt.Errorf("snap %q has no %q plug", connRef.PlugRef.Snap, connRef.PlugRef.Name)
	}
	var plugDecl *asserts.SnapDeclaration
	if plug.Snap.SnapID != "" {
		var err error
		plugDecl, err = assertstate.SnapDeclaration(st, plug.Snap.SnapID)
		if err != nil {
			return fmt.Errorf("cannot find snap declaration for %q: %v", plug.Snap.Name(), err)
		}
	}

	slot := m.repo.Slot(connRef.SlotRef.Snap, connRef.SlotRef.Name)
	if slot == nil {
		return fmt.Errorf("snap %q has no %q slot", connRef.SlotRef.Snap, connRef.SlotRef.Name)
	}
	var slotDecl *asserts.SnapDeclaration
	if slot.Snap.SnapID != "" {
		var err error
		slotDecl, err = assertstate.SnapDeclaration(st, slot.Snap.SnapID)
		if err != nil {
			return fmt.Errorf("cannot find snap declaration for %q: %v", slot.Snap.Name(), err)
		}
	}

	baseDecl, err := assertstate.BaseDeclaration(st)
	if err != nil {
		return fmt.Errorf("internal error: cannot find base declaration: %v", err)
	}

	// check the connection against the declarations' rules
	ic := policy.ConnectCandidate{
		Plug:                plug.PlugInfo,
		PlugSnapDeclaration: plugDecl,
		Slot:                slot.SlotInfo,
		SlotSnapDeclaration: slotDecl,
		BaseDeclaration:     baseDecl,
	}

	err = ic.Check()
	if err != nil {
		return err
	}

	err = m.repo.Connect(connRef)
	if err != nil {
		return err
	}

	var plugSnapst snapstate.SnapState
	if err := snapstate.Get(st, connRef.PlugRef.Snap, &plugSnapst); err != nil {
		return err
	}

	var slotSnapst snapstate.SnapState
	if err := snapstate.Get(st, connRef.SlotRef.Snap, &slotSnapst); err != nil {
		return err
	}

	if err := setupSnapSecurity(task, slot.Snap, slotSnapst.DevModeAllowed(), m.repo); err != nil {
		return err
	}
	if err := setupSnapSecurity(task, plug.Snap, plugSnapst.DevModeAllowed(), m.repo); err != nil {
		return err
	}

	conns[connRef.ID()] = connState{Interface: plug.Interface}
	setConns(st, conns)

	return nil
}

func (s *FirstBootTestSuite) TestPopulateFromSeedHappy(c *C) {
	// put a firstboot snap into the SnapBlobDir
	snapYaml := `name: foo
version: 1.0`
	mockSnapFile := snaptest.MakeTestSnapWithFiles(c, snapYaml, nil)
	targetSnapFile := filepath.Join(dirs.SnapSeedDir, "snaps", filepath.Base(mockSnapFile))
	err := os.Rename(mockSnapFile, targetSnapFile)
	c.Assert(err, IsNil)

	// put a firstboot local snap into the SnapBlobDir
	snapYaml = `name: local
version: 1.0`
	mockSnapFile = snaptest.MakeTestSnapWithFiles(c, snapYaml, nil)
	targetSnapFile2 := filepath.Join(dirs.SnapSeedDir, "snaps", filepath.Base(mockSnapFile))
	err = os.Rename(mockSnapFile, targetSnapFile2)
	c.Assert(err, IsNil)

	devAcct := assertstest.NewAccount(s.storeSigning, "developer", map[string]interface{}{
		"account-id": "developerid",
	}, "")
	devAcctFn := filepath.Join(dirs.SnapSeedDir, "assertions", "developer.account")
	err = ioutil.WriteFile(devAcctFn, asserts.Encode(devAcct), 0644)
	c.Assert(err, IsNil)

	snapDecl, err := s.storeSigning.Sign(asserts.SnapDeclarationType, map[string]interface{}{
		"series":       "16",
		"snap-id":      "snapidsnapid",
		"publisher-id": "developerid",
		"snap-name":    "foo",
		"timestamp":    time.Now().UTC().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	declFn := filepath.Join(dirs.SnapSeedDir, "assertions", "foo.snap-declaration")
	err = ioutil.WriteFile(declFn, asserts.Encode(snapDecl), 0644)
	c.Assert(err, IsNil)

	sha3_384, size, err := asserts.SnapFileSHA3_384(targetSnapFile)
	c.Assert(err, IsNil)

	snapRev, err := s.storeSigning.Sign(asserts.SnapRevisionType, map[string]interface{}{
		"snap-sha3-384": sha3_384,
		"snap-size":     fmt.Sprintf("%d", size),
		"snap-id":       "snapidsnapid",
		"developer-id":  "developerid",
		"snap-revision": "128",
		"timestamp":     time.Now().UTC().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	revFn := filepath.Join(dirs.SnapSeedDir, "assertions", "foo.snap-revision")
	err = ioutil.WriteFile(revFn, asserts.Encode(snapRev), 0644)
	c.Assert(err, IsNil)

	// add a model assertion and its chain
	assertsChain := s.makeModelAssertionChain(c)
	for i, as := range assertsChain {
		fn := filepath.Join(dirs.SnapSeedDir, "assertions", strconv.Itoa(i))
		err := ioutil.WriteFile(fn, asserts.Encode(as), 0644)
		c.Assert(err, IsNil)
	}

	// create a seed.yaml
	content := []byte(fmt.Sprintf(`
snaps:
 - name: foo
   file: %s
   devmode: true
 - name: local
   unasserted: true
   file: %s
`, filepath.Base(targetSnapFile), filepath.Base(targetSnapFile2)))
	err = ioutil.WriteFile(filepath.Join(dirs.SnapSeedDir, "seed.yaml"), content, 0644)
	c.Assert(err, IsNil)

	// run the firstboot stuff
	err = boot.PopulateStateFromSeed()
	c.Assert(err, IsNil)

	// and check the snap got correctly installed
	c.Check(osutil.FileExists(filepath.Join(dirs.SnapMountDir, "foo", "128", "meta", "snap.yaml")), Equals, true)

	c.Check(osutil.FileExists(filepath.Join(dirs.SnapMountDir, "local", "x1", "meta", "snap.yaml")), Equals, true)

	// verify
	r, err := os.Open(dirs.SnapStateFile)
	c.Assert(err, IsNil)
	state, err := state.ReadState(nil, r)
	c.Assert(err, IsNil)

	state.Lock()
	defer state.Unlock()
	// check foo
	info, err := snapstate.CurrentInfo(state, "foo")
	c.Assert(err, IsNil)
	c.Assert(info.SnapID, Equals, "snapidsnapid")
	c.Assert(info.Revision, Equals, snap.R(128))
	c.Assert(info.DeveloperID, Equals, "developerid")

	var snapst snapstate.SnapState
	err = snapstate.Get(state, "foo", &snapst)
	c.Assert(err, IsNil)
//.........这里部分代码省略.........