lotus/chain/syncstate.go
Steven Allen 7245ac2b69 fix a race in the sync manager
1. SyncerState contains a mutex and should never be copied. Honestly, this case
was probably fine but it's just as easy to create a separate snapshot type and
easier to reason about.

2. We need to initialize the syncStates array once at start, before accessing
it. By each syncer state inside each worker, we were racing with calls to
`State()`. Again, this was probably benign, but I don't trust optimizing
compilers.
2020-10-10 08:31:04 -07:00

85 lines
1.4 KiB
Go

package chain
import (
"sync"
"time"
"github.com/filecoin-project/go-state-types/abi"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/types"
)
type SyncerStateSnapshot struct {
Target *types.TipSet
Base *types.TipSet
Stage api.SyncStateStage
Height abi.ChainEpoch
Message string
Start time.Time
End time.Time
}
type SyncerState struct {
lk sync.Mutex
data SyncerStateSnapshot
}
func (ss *SyncerState) SetStage(v api.SyncStateStage) {
if ss == nil {
return
}
ss.lk.Lock()
defer ss.lk.Unlock()
ss.data.Stage = v
if v == api.StageSyncComplete {
ss.data.End = build.Clock.Now()
}
}
func (ss *SyncerState) Init(base, target *types.TipSet) {
if ss == nil {
return
}
ss.lk.Lock()
defer ss.lk.Unlock()
ss.data.Target = target
ss.data.Base = base
ss.data.Stage = api.StageHeaders
ss.data.Height = 0
ss.data.Message = ""
ss.data.Start = build.Clock.Now()
ss.data.End = time.Time{}
}
func (ss *SyncerState) SetHeight(h abi.ChainEpoch) {
if ss == nil {
return
}
ss.lk.Lock()
defer ss.lk.Unlock()
ss.data.Height = h
}
func (ss *SyncerState) Error(err error) {
if ss == nil {
return
}
ss.lk.Lock()
defer ss.lk.Unlock()
ss.data.Message = err.Error()
ss.data.Stage = api.StageSyncErrored
ss.data.End = build.Clock.Now()
}
func (ss *SyncerState) Snapshot() SyncerStateSnapshot {
ss.lk.Lock()
defer ss.lk.Unlock()
return ss.data
}