lotus/storage/sealing/fsm.go
2020-01-20 16:23:56 +08:00

247 lines
6.5 KiB
Go

package sealing
import (
"context"
"reflect"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/lib/statemachine"
)
func (m *Sealing) Plan(events []statemachine.Event, user interface{}) (interface{}, error) {
next, err := m.plan(events, user.(*SectorInfo))
if err != nil || next == nil {
return nil, err
}
return func(ctx statemachine.Context, si SectorInfo) error {
err := next(ctx, si)
if err != nil {
if err := ctx.Send(SectorFatalError{error: err}); err != nil {
return xerrors.Errorf("error while sending error: reporting %+v: %w", err, err)
}
}
return nil
}, nil
}
var fsmPlanners = []func(events []statemachine.Event, state *SectorInfo) error{
api.UndefinedSectorState: planOne(on(SectorStart{}, api.Packing)),
api.Packing: planOne(on(SectorPacked{}, api.Unsealed)),
api.Unsealed: planOne(
on(SectorSealed{}, api.PreCommitting),
on(SectorSealFailed{}, api.SealFailed),
),
api.PreCommitting: planOne(
on(SectorPreCommitted{}, api.PreCommitted),
on(SectorPreCommitFailed{}, api.PreCommitFailed),
),
api.PreCommitted: planOne(
on(SectorSeedReady{}, api.Committing),
on(SectorPreCommitFailed{}, api.PreCommitFailed),
),
api.Committing: planCommitting,
api.CommitWait: planOne(
on(SectorProving{}, api.Proving),
on(SectorCommitFailed{}, api.CommitFailed),
),
api.Proving: planOne(
on(SectorFaultReported{}, api.FaultReported),
on(SectorFaulty{}, api.Faulty),
),
api.Faulty: planOne(
on(SectorFaultReported{}, api.FaultReported),
),
api.FaultedFinal: final,
}
func (m *Sealing) plan(events []statemachine.Event, state *SectorInfo) (func(statemachine.Context, SectorInfo) error, error) {
/////
// First process all events
p := fsmPlanners[state.State]
if p == nil {
return nil, xerrors.Errorf("planner for state %d not found", state.State)
}
if err := p(events, state); err != nil {
return nil, xerrors.Errorf("running planner for state %s failed: %w", api.SectorStates[state.State], err)
}
/////
// Now decide what to do next
/*
* Empty
| |
| v
*<- Packing <- incoming
| |
| v
*<- Unsealed <--> SealFailed
| |
| v
* PreCommitting <--> PreCommitFailed
| | ^
| v |
*<- PreCommitted ------/
| |||
| vvv v--> SealCommitFailed
*<- Committing
| | ^--> CommitFailed
| v ^
*<- CommitWait ---/
| |
| v
*<- Proving
|
v
FailedUnrecoverable
UndefinedSectorState <- ¯\_(ツ)_/¯
| ^
*---------------------/
*/
switch state.State {
// Happy path
case api.Packing:
return m.handlePacking, nil
case api.Unsealed:
return m.handleUnsealed, nil
case api.PreCommitting:
return m.handlePreCommitting, nil
case api.PreCommitted:
return m.handlePreCommitted, nil
case api.Committing:
return m.handleCommitting, nil
case api.CommitWait:
return m.handleCommitWait, nil
case api.Proving:
// TODO: track sector health / expiration
log.Infof("Proving sector %d", state.SectorID)
// Handled failure modes
case api.SealFailed:
log.Warnf("sector %d entered unimplemented state 'SealFailed'", state.SectorID)
case api.PreCommitFailed:
log.Warnf("sector %d entered unimplemented state 'PreCommitFailed'", state.SectorID)
case api.SealCommitFailed:
log.Warnf("sector %d entered unimplemented state 'SealCommitFailed'", state.SectorID)
case api.CommitFailed:
log.Warnf("sector %d entered unimplemented state 'CommitFailed'", state.SectorID)
// Faults
case api.Faulty:
return m.handleFaulty, nil
case api.FaultReported:
return m.handleFaultReported, nil
// Fatal errors
case api.UndefinedSectorState:
log.Error("sector update with undefined state!")
case api.FailedUnrecoverable:
log.Errorf("sector %d failed unrecoverably", state.SectorID)
default:
log.Errorf("unexpected sector update state: %d", state.State)
}
return nil, nil
}
func planCommitting(events []statemachine.Event, state *SectorInfo) error {
for _, event := range events {
switch e := event.User.(type) {
case globalMutator:
if e.applyGlobal(state) {
return nil
}
case SectorCommitted: // the normal case
e.apply(state)
state.State = api.CommitWait
case SectorSeedReady: // seed changed :/
if e.seed.Equals(&state.Seed) {
log.Warnf("planCommitting: got SectorSeedReady, but the seed didn't change")
continue // or it didn't!
}
log.Warnf("planCommitting: commit Seed changed")
e.apply(state)
state.State = api.Committing
return nil
case SectorSealCommitFailed:
state.State = api.SealCommitFailed
case SectorSealFailed:
state.State = api.CommitFailed
default:
return xerrors.Errorf("planCommitting got event of unknown type %T, events: %+v", event.User, events)
}
}
return nil
}
func (m *Sealing) restartSectors(ctx context.Context) error {
trackedSectors, err := m.ListSectors()
if err != nil {
log.Errorf("loading sector list: %+v", err)
}
for _, sector := range trackedSectors {
if err := m.sectors.Send(sector.SectorID, SectorRestart{}); err != nil {
log.Errorf("restarting sector %d: %+v", sector.SectorID, err)
}
}
// TODO: Grab on-chain sector set and diff with trackedSectors
return nil
}
func (m *Sealing) ForceSectorState(ctx context.Context, id uint64, state api.SectorState) error {
return m.sectors.Send(id, SectorForceState{state})
}
func final(events []statemachine.Event, state *SectorInfo) error {
return xerrors.Errorf("didn't expect any events in state %s, got %+v", api.SectorStates[state.State], events)
}
func on(mut mutator, next api.SectorState) func() (mutator, api.SectorState) {
return func() (mutator, api.SectorState) {
return mut, next
}
}
func planOne(ts ...func() (mut mutator, next api.SectorState)) func(events []statemachine.Event, state *SectorInfo) error {
return func(events []statemachine.Event, state *SectorInfo) error {
if len(events) != 1 {
for _, event := range events {
if gm, ok := event.User.(globalMutator); !ok {
gm.applyGlobal(state)
return nil
}
}
return xerrors.Errorf("planner for state %s only has a plan for a single event only, got %+v", api.SectorStates[state.State], events)
}
for _, t := range ts {
mut, next := t()
if reflect.TypeOf(events[0].User) != reflect.TypeOf(mut) {
continue
}
events[0].User.(mutator).apply(state)
state.State = next
return nil
}
return xerrors.Errorf("planner for state %s received unexpected event %+v", api.SectorStates[state.State], events[0])
}
}