devicestate

package
v0.0.0-...-9e584df Latest Latest
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 Go to latest Published: Aug 27, 2021 License: GPL-3.0 Imports: 61 Imported by: 0

Documentation

Overview

Package devicestate implements the manager and state aspects responsible for the device identity and policies.

Index

Constants

View Source 
const (
	RebootHaltOp     = "halt"
	RebootPoweroffOp = "poweroff"
)

Variables

View Source 
var EarlyConfig func(st *state.State, preloadGadget func() (sysconfig.Device, *gadget.Info, error)) error

EarlyConfig is a hook set by configstate that can process early configuration during managers' startup.

View Source 
var ErrNoSystems = errors.New("no systems seeds")
View Source 
var ErrUnsupportedAction = errors.New("unsupported action")

Functions

func AllowUC20RemodelTesting 

func AllowUC20RemodelTesting(allow bool) (restore func())

AllowUC20RemodelTesting is a temporary helper to allow testing remodeling of UC20 before the implementation is complete and the policy for this settled. It will be removed once remodel is fully implemented and made available for general use.

func CanManageRefreshes 

func CanManageRefreshes(st *state.State) bool

CanManageRefreshes returns true if the device can be switched to the "core.refresh.schedule=managed" mode.

TODO:

  • Move the CanManageRefreshes code into the ifstate
  • Look at the connections and find the connection for snapd-control with the managed attribute
  • Take the snap from this connection and look at the snapstate to see if that snap has a snap declaration (to ensure it comes from the store)

func CreateRecoverySystem 

func CreateRecoverySystem(st *state.State, label string) (*state.Change, error)

func DeviceCtx 

func DeviceCtx(st *state.State, task *state.Task, providedDeviceCtx snapstate.DeviceContext) (snapstate.DeviceContext, error)

DeviceCtx picks a device context from state, optional task or an optionally pre-provided one. Returns ErrNoState if a model assertion is not yet known. In particular if task belongs to a remodeling change this will find the appropriate remodel context.

func InjectSetModelError 

func InjectSetModelError(err error)

InjectSetModelError will trigger the selected error in the doSetModel handler. This is only useful for testing.

func Remodel 

func Remodel(st *state.State, new *asserts.Model) (*state.Change, error)

Remodel takes a new model assertion and generates a change that takes the device from the old to the new model or an error if the transition is not possible.

TODO:

  • Check estimated disk size delta
  • Check all relevant snaps exist in new store (need to check that even unchanged snaps are accessible)
  • Make sure this works with Core 20 as well, in the Core 20 case we must enforce the default-channels from the model as well

func Remodeling 

func Remodeling(st *state.State) bool

Remodeling returns true whether there's a remodeling in progress

Types

type DeviceManager 

type DeviceManager struct {
	// contains filtered or unexported fields
}

DeviceManager is responsible for managing the device identity and device policies.

func Manager 

func Manager(s *state.State, hookManager *hookstate.HookManager, runner *state.TaskRunner, newStore func(storecontext.DeviceBackend) snapstate.StoreService) (*DeviceManager, error)

Manager returns a new device manager.

func (*DeviceManager) CanStandby 

func (m *DeviceManager) CanStandby() bool

func (*DeviceManager) Ensure 

func (m *DeviceManager) Ensure() error

Ensure implements StateManager.Ensure.

func (*DeviceManager) Model 

func (m *DeviceManager) Model() (*asserts.Model, error)

Model returns the device model assertion.

func (*DeviceManager) Reboot 

func (m *DeviceManager) Reboot(systemLabel, mode string) error

Reboot triggers a reboot into the given systemLabel and mode.

When called without a systemLabel and without a mode it will just trigger a regular reboot.

When called without a systemLabel but with a mode it will use the current system to enter the given mode.

Note that "recover" and "run" modes are only available for the current system.

func (*DeviceManager) Registered 

func (m *DeviceManager) Registered() <-chan struct{}

Registered returns a channel that is closed when the device is known to have been registered.

func (*DeviceManager) ReloadModeenv 

func (m *DeviceManager) ReloadModeenv() error

ReloadModeenv is only useful for integration testing

func (*DeviceManager) RequestSystemAction 

func (m *DeviceManager) RequestSystemAction(systemLabel string, action SystemAction) error

RequestSystemAction requests the provided system to be run in a given mode as specified by action. A system reboot will be requested when the request can be successfully carried out.

func (*DeviceManager) ResetToPostBootState 

func (m *DeviceManager) ResetToPostBootState()

ResetToPostBootState is only useful for integration testing.

func (*DeviceManager) Serial 

func (m *DeviceManager) Serial() (*asserts.Serial, error)

Serial returns the device serial assertion.

func (*DeviceManager) StartOfOperationTime 

func (m *DeviceManager) StartOfOperationTime() (time.Time, error)

StartOfOperationTime returns the time when snapd started operating, and sets it in the state when called for the first time. The StartOfOperationTime time is seed-time if available, or current time otherwise.

func (*DeviceManager) StartUp 

func (m *DeviceManager) StartUp() error

StartUp implements StateStarterUp.Startup.

func (*DeviceManager) StoreContextBackend 

func (m *DeviceManager) StoreContextBackend() storecontext.Backend

func (*DeviceManager) SystemMode 

func (m *DeviceManager) SystemMode(sysExpect SysExpectation) string

SystemMode returns the current mode of the system. An expectation about the system controls the returned mode when none is set explicitly, as it's the case on pre-UC20 systems. In which case, with SysAny, the mode defaults to implicit "run", thus covering pre-UC20 systems. With SysHasModeeenv, as there is always an explicit mode in systems that use modeenv, no implicit default is used and thus "" is returned for pre-UC20 systems.

func (*DeviceManager) SystemModeInfo 

func (m *DeviceManager) SystemModeInfo() (*SystemModeInfo, error)

SystemModeInfo returns details about the current system mode the device is in.

func (*DeviceManager) Systems 

func (m *DeviceManager) Systems() ([]*System, error)

Systems list the available recovery/seeding systems. Returns the list of systems, ErrNoSystems when no systems seeds were found or other error.

type RebootOptions 

type RebootOptions struct {
	Op string `json:"op,omitempty"`
}

RebootOptions can be attached to restart-system-to-run-mode tasks to control their restart behavior.

type RemodelKind 

type RemodelKind int

RemodelKind designates a kind of remodeling. 

const (
	// same brand/model, brand store
	UpdateRemodel RemodelKind = iota
	// same brand/model, different brand store
	StoreSwitchRemodel
	// different brand/model, maybe different brand store
	ReregRemodel
)

func ClassifyRemodel 

func ClassifyRemodel(oldModel, newModel *asserts.Model) RemodelKind

ClassifyRemodel returns what kind of remodeling is going from oldModel to newModel.

func (RemodelKind) String 

func (k RemodelKind) String() string

type SysExpectation 

type SysExpectation int
const (
	// SysAny indicates any system is appropriate.
	SysAny SysExpectation = iota
	// SysHasModeenv indicates only systems with modeenv are appropriate.
	SysHasModeenv
)

type System 

type System struct {
	// Current is true when the system running now was installed from that
	// seed
	Current bool
	// Label of the seed system
	Label string
	// Model assertion of the system
	Model *asserts.Model
	// Brand information
	Brand *asserts.Account
	// Actions available for this system
	Actions []SystemAction
}

type SystemAction 

type SystemAction struct {
	Title string
	Mode  string
}

type SystemModeInfo 

type SystemModeInfo struct {
	Mode              string
	HasModeenv        bool
	Seeded            bool
	BootFlags         []string
	HostDataLocations []string
}

func SystemModeInfoFromState 

func SystemModeInfoFromState(st *state.State) (*SystemModeInfo, error)

SystemModeInfoFromState returns details about the system mode the device is in.

Source Files

View all Source files

Directories

Path Synopsis
Package internal (of devicestate) provides functions to access and set the device state for use only by devicestate, for convenience they are also exposed via devicestatetest for use in tests.
 Package internal (of devicestate) provides functions to access and set the device state for use only by devicestate, for convenience they are also exposed via devicestatetest for use in tests.

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