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eth/fetcher: schedule missing parent block synchronously

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Zergity 2019-08-15 15:07:09 +07:00
parent 9a05d3e761
commit 0736bc9562
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GPG key ID: AE827ADEE29FDBB4
1 changed files with 30 additions and 21 deletions
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49
eth/fetcher/fetcher.go
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@ -289,6 +289,24 @@ func (f *Fetcher) loop() {
fetchTimer := time.NewTimer(0)
completeTimer := time.NewTimer(0)
scheduleBlockAnnouncement := func(notification *announce) bool {
if _, ok := f.fetching[notification.hash]; ok {
return false
}
if _, ok := f.completing[notification.hash]; ok {
return false
}
f.announces[notification.origin]++
f.announced[notification.hash] = append(f.announced[notification.hash], notification)
if f.announceChangeHook != nil && len(f.announced[notification.hash]) == 1 {
f.announceChangeHook(notification.hash, true)
}
if len(f.announced) == 1 {
f.rescheduleFetch(fetchTimer)
}
return true
}
for {
// Clean up any expired block fetches
for hash, announce := range f.fetching {
@ -327,13 +345,17 @@ func (f *Fetcher) loop() {
log.Info("Peer lost while fetching for parent", "peer", op.origin)
break
}
go func() {
log.Info("Notify of parent hash", "hash", parentHash, "number", op.block.NumberU64()-1, "peer", op.origin)
err := f.Notify(op.origin, parentHash, op.block.NumberU64()-1, time.Now(), headerRequestFn, bodyRequestFn)
if err != nil {
log.Error("Unable to notify of parent block", "error", err)
scheduled := scheduleBlockAnnouncement(&announce{
hash: parentHash,
number: op.block.NumberU64() - 1,
time: time.Now(),
origin: op.origin,
fetchHeader: headerRequestFn,
fetchBodies: bodyRequestFn,
})
if scheduled {
log.Trace("Remote parent hash scheduled", "number", op.block.NumberU64()-1, "hash", parentHash, "peer", op.origin)
}
}()
break
}
f.insert(op.origin, op.block)
@ -363,20 +385,7 @@ func (f *Fetcher) loop() {
}
}
// All is well, schedule the announce if block's not yet downloading
if _, ok := f.fetching[notification.hash]; ok {
break
}
if _, ok := f.completing[notification.hash]; ok {
break
}
f.announces[notification.origin] = count
f.announced[notification.hash] = append(f.announced[notification.hash], notification)
if f.announceChangeHook != nil && len(f.announced[notification.hash]) == 1 {
f.announceChangeHook(notification.hash, true)
}
if len(f.announced) == 1 {
f.rescheduleFetch(fetchTimer)
}
scheduleBlockAnnouncement(notification)
case op := <-f.inject:
// A direct block insertion was requested, try and fill any pending gaps