diff options
| -rw-r--r-- | blockpool/blockpool.go | 176 | ||||
| -rw-r--r-- | blockpool/blockpool_test.go | 56 | ||||
| -rw-r--r-- | blockpool/blockpool_util_test.go | 36 | ||||
| -rw-r--r-- | blockpool/config_test.go | 4 | ||||
| -rw-r--r-- | blockpool/peers.go | 23 | ||||
| -rw-r--r-- | blockpool/peers_test.go | 44 | ||||
| -rw-r--r-- | blockpool/test/hash_pool.go | 15 | ||||
| -rw-r--r-- | blockpool/test/logger.go | 2 | ||||
| -rw-r--r-- | blockpool/test/util.go | 2 |
9 files changed, 202 insertions, 156 deletions
diff --git a/blockpool/blockpool.go b/blockpool/blockpool.go index b8cac4913..921d34949 100644 --- a/blockpool/blockpool.go +++ b/blockpool/blockpool.go @@ -38,10 +38,11 @@ var ( idleBestPeerTimeout = 120 * time.Second // duration of suspension after peer fatal error during which peer is not allowed to reconnect peerSuspensionInterval = 300 * time.Second + // status is logged every statusUpdateInterval + statusUpdateInterval = 3 * time.Second ) -// config embedded in components, by default fall back to constants -// by default all resolved to local +// blockpool config, values default to constants type Config struct { BlockHashesBatchSize int BlockBatchSize int @@ -53,28 +54,40 @@ type Config struct { BlocksTimeout time.Duration IdleBestPeerTimeout time.Duration PeerSuspensionInterval time.Duration + StatusUpdateInterval time.Duration } // blockpool errors const ( ErrInvalidBlock = iota ErrInvalidPoW - ErrUnrequestedBlock ErrInsufficientChainInfo ErrIdleTooLong ErrIncorrectTD + ErrUnrequestedBlock ) +// error descriptions var errorToString = map[int]string{ - ErrInvalidBlock: "Invalid block", - ErrInvalidPoW: "Invalid PoW", + ErrInvalidBlock: "Invalid block", // fatal + ErrInvalidPoW: "Invalid PoW", // fatal + ErrInsufficientChainInfo: "Insufficient chain info", // fatal + ErrIdleTooLong: "Idle too long", // fatal + ErrIncorrectTD: "Incorrect Total Difficulty", // fatal ErrUnrequestedBlock: "Unrequested block", - ErrInsufficientChainInfo: "Insufficient chain info", - ErrIdleTooLong: "Idle too long", - ErrIncorrectTD: "Incorrect Total Difficulty", } -// init initialises all your laundry +// error severity +func severity(code int) ethlogger.LogLevel { + switch code { + case ErrUnrequestedBlock: + return ethlogger.WarnLevel + default: + return ethlogger.ErrorLevel + } +} + +// init initialises the Config, zero values fall back to constants func (self *Config) init() { if self.BlockHashesBatchSize == 0 { self.BlockHashesBatchSize = blockHashesBatchSize @@ -106,6 +119,9 @@ func (self *Config) init() { if self.PeerSuspensionInterval == 0 { self.PeerSuspensionInterval = peerSuspensionInterval } + if self.StatusUpdateInterval == 0 { + self.StatusUpdateInterval = statusUpdateInterval + } } // node is the basic unit of the internal model of block chain/tree in the blockpool @@ -132,31 +148,35 @@ type entry struct { type BlockPool struct { Config *Config - // the minimal interface with blockchain - hasBlock func(hash common.Hash) bool - insertChain func(types.Blocks) error - verifyPoW func(pow.Block) bool - chainEvents *event.TypeMux + // the minimal interface with blockchain manager + hasBlock func(hash common.Hash) bool // query if block is known + insertChain func(types.Blocks) error // add section to blockchain + verifyPoW func(pow.Block) bool // soft PoW verification + chainEvents *event.TypeMux // ethereum eventer for chainEvents - tdSub event.Subscription - td *big.Int + tdSub event.Subscription // subscription to core.ChainHeadEvent + td *big.Int // our own total difficulty - pool map[string]*entry - peers *peers + pool map[string]*entry // the actual blockpool + peers *peers // peers manager in peers.go + + status *status // info about blockpool (UI interface) in status.go lock sync.RWMutex chainLock sync.RWMutex // alloc-easy pool of hash slices hashSlicePool chan []common.Hash - status *status - - quit chan bool - wg sync.WaitGroup - running bool + // waitgroup is used in tests to wait for result-critical routines + // as well as in determining idle / syncing status + wg sync.WaitGroup // + quit chan bool // chan used for quitting parallel routines + running bool // } // public constructor +// after blockpool returned, config can be set +// BlockPool.Start will call Config.init to set missing values func New( hasBlock func(hash common.Hash) bool, insertChain func(types.Blocks) error, @@ -175,15 +195,6 @@ func New( } } -func severity(code int) ethlogger.LogLevel { - switch code { - case ErrUnrequestedBlock: - return ethlogger.WarnLevel - default: - return ethlogger.ErrorLevel - } -} - // allows restart func (self *BlockPool) Start() { self.lock.Lock() @@ -193,7 +204,9 @@ func (self *BlockPool) Start() { return } + // set missing values self.Config.init() + self.hashSlicePool = make(chan []common.Hash, 150) self.status = newStatus() self.quit = make(chan bool) @@ -212,8 +225,11 @@ func (self *BlockPool) Start() { bp: self, } + // subscribe and listen to core.ChainHeadEvent{} for uptodate TD self.tdSub = self.chainEvents.Subscribe(core.ChainHeadEvent{}) - timer := time.NewTicker(3 * time.Second) + + // status update interval + timer := time.NewTicker(self.Config.StatusUpdateInterval) go func() { for { select { @@ -292,9 +308,14 @@ func (self *BlockPool) Wait(t time.Duration) { /* AddPeer is called by the eth protocol instance running on the peer after the status message has been received with total difficulty and current block hash -Called a second time with the same peer id, it is used to update chain info for a peer. This is used when a new (mined) block message is received. + +Called a second time with the same peer id, it is used to update chain info for a peer. +This is used when a new (mined) block message is received. + RemovePeer needs to be called when the peer disconnects. -Peer info is currently not persisted across disconnects (or sessions) + +Peer info is currently not persisted across disconnects (or sessions) except for suspension + */ func (self *BlockPool) AddPeer( @@ -319,12 +340,12 @@ AddBlockHashes Entry point for eth protocol to add block hashes received via BlockHashesMsg -only hashes from the best peer are handled +Only hashes from the best peer are handled -initiates further hash requests until a known parent is reached (unless cancelled by a peerSwitch event, i.e., when a better peer becomes best peer) -launches all block request processes on each chain section +Initiates further hash requests until a known parent is reached (unless cancelled by a peerSwitch event, i.e., when a better peer becomes best peer) +Launches all block request processes on each chain section -the first argument is an iterator function. Using this block hashes are decoded from the rlp message payload on demand. As a result, AddBlockHashes needs to run synchronously for one peer since the message is discarded if the caller thread returns. +The first argument is an iterator function. Using this block hashes are decoded from the rlp message payload on demand. As a result, AddBlockHashes needs to run synchronously for one peer since the message is discarded if the caller thread returns. */ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId string) { @@ -335,7 +356,6 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st // bestpeer is still the best peer self.wg.Add(1) - defer func() { self.wg.Done() }() self.status.lock.Lock() @@ -360,11 +380,11 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st return } /* - when peer is promoted in switchPeer, a new header section process is launched - as the head section skeleton is actually created here, it is signaled to the process - so that it can quit - in the special case that the node for parent of the head block is found in the blockpool - (with or without fetched block) + When peer is promoted in switchPeer, a new header section process is launched. + Once the head section skeleton is actually created here, it is signaled to the process + so that it can quit. + In the special case that the node for parent of the head block is found in the blockpool + (with or without fetched block), a singleton section containing only the head block node is created. */ headSection = true if entry := self.get(bestpeer.currentBlockHash); entry == nil { @@ -383,7 +403,7 @@ func (self *BlockPool) AddBlockHashes(next func() (common.Hash, bool), peerId st } else { // otherwise set child section iff found node is the root of a section // this is a possible scenario when a singleton head section was created - // on an earlier occasion this peer or another with the same block was best peer + // on an earlier occasion when this peer or another with the same block was best peer if entry.node == entry.section.bottom { child = entry.section plog.DebugDetailf("AddBlockHashes: peer <%s>: connects to child section root %s", peerId, hex(bestpeer.currentBlockHash)) @@ -414,7 +434,7 @@ LOOP: default: } - // if we reach the blockchain we stop reading more + // if we reach the blockchain we stop reading further blockhashes if self.hasBlock(hash) { // check if known block connecting the downloaded chain to our blockchain plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) found block %s in the blockchain", peerId, hex(bestpeer.currentBlockHash), hex(hash)) @@ -451,10 +471,11 @@ LOOP: // reached a known chain in the pool if entry.node == entry.section.bottom && n == 1 { /* - the first block hash received is an orphan in the pool - this also supports clients that (despite the spec) include <from> hash in their + The first block hash received is an orphan node in the pool + + This also supports clients that (despite the spec) include <from> hash in their response to hashes request. Note that by providing <from> we can link sections - without having to wait for the root block of the child section to arrive, so it allows for superior performance + without having to wait for the root block of the child section to arrive, so it allows for superior performance. */ plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) found head block [%s] as root of connecting child section [%s] skipping", peerId, hex(bestpeer.currentBlockHash), hex(hash), sectionhex(entry.section)) // record the entry's chain section as child section @@ -486,9 +507,8 @@ LOOP: plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): %v nodes in new section", peerId, hex(bestpeer.currentBlockHash), len(nodes)) /* - handle forks where connecting node is mid-section - by splitting section at fork - no splitting needed if connecting node is head of a section + Handle forks where connecting node is mid-section by splitting section at fork. + No splitting needed if connecting node is head of a section. */ if parent != nil && entry != nil && entry.node != parent.top && len(nodes) > 0 { plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): fork after %s", peerId, hex(bestpeer.currentBlockHash), hex(hash)) @@ -500,10 +520,7 @@ LOOP: self.status.lock.Unlock() } - /* - if new section is created, link it to parent/child sections - and launch section process fetching blocks and further hashes - */ + // If new section is created, link it to parent/child sections. sec = self.linkSections(nodes, parent, child) if sec != nil { @@ -516,11 +533,12 @@ LOOP: self.chainLock.Unlock() /* - if a blockpool node is reached (parent section is not nil), + If a blockpool node is reached (parent section is not nil), activate section (unless our peer is demoted by now). - this can be the bottom half of a newly split section in case of a fork. + This can be the bottom half of a newly split section in case of a fork. + bestPeer is nil if we got here after our peer got demoted while processing. - in this case no activation should happen + In this case no activation should happen */ if parent != nil && !peerswitch { self.activateChain(parent, bestpeer, nil) @@ -528,9 +546,8 @@ LOOP: } /* - if a new section was created, - register section iff head section or no child known - activate it with this peer + If a new section was created, register section iff head section or no child known + Activate it with this peer. */ if sec != nil { // switch on section process (it is paused by switchC) @@ -541,9 +558,9 @@ LOOP: bestpeer.lock.Unlock() } /* - request next block hashes for parent section here. - but only once, repeating only when bottom block arrives, - otherwise no way to check if it arrived + Request another batch of older block hashes for parent section here. + But only once, repeating only when the section's root block arrives. + Otherwise no way to check if it arrived. */ bestpeer.requestBlockHashes(sec.bottom.hash) plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): start requesting blocks for section [%s]", peerId, hex(bestpeer.currentBlockHash), sectionhex(sec)) @@ -554,7 +571,7 @@ LOOP: } } - // if we are processing peer's head section, signal it to headSection process that it is created + // If we are processing peer's head section, signal it to headSection process that it is created. if headSection { plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) head section registered on head section process", peerId, hex(bestpeer.currentBlockHash)) @@ -578,11 +595,13 @@ LOOP: /* AddBlock is the entry point for the eth protocol to call when blockMsg is received. - It has a strict interpretation of the protocol in that if the block received has not been requested, it results in an error + It has a strict interpretation of the protocol in that if the block received has not been requested, it results in an error. At the same time it is opportunistic in that if a requested block may be provided by any peer. The received block is checked for PoW. Only the first PoW-valid block for a hash is considered legit. + + If the block received is the head block of the current best peer, signal it to the head section process */ func (self *BlockPool) AddBlock(block *types.Block, peerId string) { hash := block.Hash() @@ -611,6 +630,7 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) { self.status.lock.Unlock() } else { plog.DebugDetailf("AddBlock: head block %s for peer <%s> (head: %s) already known", hex(hash), peerId, hex(sender.currentBlockHash)) + // signal to head section process sender.currentBlockC <- block } } else { @@ -629,7 +649,6 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) { sender.lock.Unlock() if entry == nil { - // penalise peer for sending what we have not asked plog.DebugDetailf("AddBlock: unrequested block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash)) sender.addError(ErrUnrequestedBlock, "%x", hash) @@ -647,7 +666,7 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) { node.lock.Lock() defer node.lock.Unlock() - // check if block already present + // check if block already received if node.block != nil { plog.DebugDetailf("AddBlock: block %s from peer <%s> (head: %s) already sent by <%s> ", hex(hash), peerId, hex(sender.currentBlockHash), node.blockBy) return @@ -683,9 +702,9 @@ func (self *BlockPool) AddBlock(block *types.Block, peerId string) { } /* - iterates down a chain section by section - activating section process on incomplete sections with peer - relinking orphaned sections with their parent if root block (and its parent hash) is known) + activateChain iterates down a chain section by section. + It activates the section process on incomplete sections with peer. + It relinks orphaned sections with their parent if root block (and its parent hash) is known. */ func (self *BlockPool) activateChain(sec *section, p *peer, connected map[string]*section) { @@ -704,8 +723,8 @@ LOOP: connected[sec.top.hash.Str()] = sec } /* - we need to relink both complete and incomplete sections - the latter could have been blockHashesRequestsComplete before being delinked from its parent + Need to relink both complete and incomplete sections + An incomplete section could have been blockHashesRequestsComplete before being delinked from its parent. */ if parent == nil { if sec.bottom.block != nil { @@ -720,7 +739,7 @@ LOOP: } sec = parent - // stop if peer got demoted + // stop if peer got demoted or global quit select { case <-switchC: break LOOP @@ -731,6 +750,7 @@ LOOP: } } +// check if block's actual TD (calculated after successful insertChain) is identical to TD advertised for peer's head block. func (self *BlockPool) checkTD(nodes ...*node) { for _, n := range nodes { if n.td != nil { @@ -742,7 +762,7 @@ func (self *BlockPool) checkTD(nodes ...*node) { } } -// must run in separate go routine, otherwise +// requestBlocks must run in separate go routine, otherwise // switchpeer -> activateChain -> activate deadlocks on section process select and peers.lock func (self *BlockPool) requestBlocks(attempts int, hashes []common.Hash) { self.wg.Add(1) @@ -806,6 +826,7 @@ func (self *BlockPool) remove(sec *section) { } } +// get/put for optimised allocation similar to sync.Pool func (self *BlockPool) getHashSlice() (s []common.Hash) { select { case s = <-self.hashSlicePool: @@ -815,7 +836,6 @@ func (self *BlockPool) getHashSlice() (s []common.Hash) { return } -// Return returns a Client to the pool. func (self *BlockPool) putHashSlice(s []common.Hash) { if len(s) == self.Config.BlockBatchSize { select { diff --git a/blockpool/blockpool_test.go b/blockpool/blockpool_test.go index a76cab9b6..cd69d5104 100644 --- a/blockpool/blockpool_test.go +++ b/blockpool/blockpool_test.go @@ -9,6 +9,9 @@ import ( "github.com/ethereum/go-ethereum/core/types" ) +// using the mock framework in blockpool_util_test +// we test various scenarios here + func TestPeerWithKnownBlock(t *testing.T) { test.LogInit() _, blockPool, blockPoolTester := newTestBlockPool(t) @@ -44,50 +47,6 @@ func TestPeerWithKnownParentBlock(t *testing.T) { blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain) } -func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) { - test.LogInit() - _, blockPool, blockPoolTester := newTestBlockPool(t) - blockPoolTester.blockChain[0] = nil - blockPoolTester.initRefBlockChain(4) - peer0 := blockPoolTester.newPeer("peer0", 2, 2) - peer1 := blockPoolTester.newPeer("peer1", 1, 1) - peer2 := blockPoolTester.newPeer("peer2", 4, 4) - - blockPool.Start() - blockPoolTester.tds = make(map[int]int) - blockPoolTester.tds[3] = 3 - - // pool - peer0.AddPeer() - peer0.serveBlocks(1, 2) - best := peer1.AddPeer() - // this tests that peer1 is not promoted over peer0 yet - if best { - t.Errorf("peer1 (TD=1) should not be set as best") - } - best = peer2.AddPeer() - peer2.serveBlocks(3, 4) - peer2.serveBlockHashes(4, 3, 2, 1) - hashes := blockPoolTester.hashPool.IndexesToHashes([]int{2, 3}) - peer1.waitBlocksRequests(3) - blockPool.AddBlock(&types.Block{ - HeaderHash: common.Hash(hashes[1]), - ParentHeaderHash: common.Hash(hashes[0]), - Td: common.Big3, - }, "peer1") - - blockPool.RemovePeer("peer2") - if blockPool.peers.best.id != "peer1" { - t.Errorf("peer1 (TD=3) should be set as best") - } - peer1.serveBlocks(0, 1, 2) - - blockPool.Wait(waitTimeout) - blockPool.Stop() - blockPoolTester.refBlockChain[4] = []int{} - blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain) -} - func TestSimpleChain(t *testing.T) { test.LogInit() _, blockPool, blockPoolTester := newTestBlockPool(t) @@ -166,6 +125,7 @@ func TestNewBlocksOnPartialChain(t *testing.T) { go peer1.serveBlocks(4, 5) // partially complete section go peer1.serveBlockHashes(5, 4, 3) peer1.serveBlocks(3, 4) // partially complete section + // peer1 found new blocks peer1.td = 7 peer1.currentBlock = 7 @@ -176,7 +136,6 @@ func TestNewBlocksOnPartialChain(t *testing.T) { go peer1.serveBlocks(5, 6) go peer1.serveBlockHashes(3, 2, 1) // tests that hash request from known chain root is remembered peer1.serveBlocks(0, 1, 2) - // blockPool.RemovePeer("peer1") blockPool.Wait(waitTimeout) blockPool.Stop() @@ -468,8 +427,8 @@ func TestForkCompleteSectionSwitchBackByPeerSwitchBack(t *testing.T) { peer1.AddPeer() go peer1.serveBlocks(8, 9) go peer1.serveBlockHashes(9, 8, 7) - peer1.serveBlocks(3, 7, 8) // make sure this section is complete - time.Sleep(1 * time.Second) + peer1.serveBlocks(3, 7, 8) // make sure this section is complete + time.Sleep(1 * time.Second) // go peer1.serveBlockHashes(7, 3, 2) // block 3/7 is section boundary peer1.serveBlocks(2, 3) // partially complete sections block 2 missing peer2.AddPeer() // @@ -477,8 +436,7 @@ func TestForkCompleteSectionSwitchBackByPeerSwitchBack(t *testing.T) { go peer2.serveBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3 peer2.serveBlocks(2, 3, 4, 5) // block 2 still missing. blockPool.RemovePeer("peer2") // peer2 disconnects, peer1 is promoted again as best peer - // peer1.serveBlockHashes(7, 3) // tests that hash request from fork root is remembered even though section process completed - go peer1.serveBlockHashes(2, 1, 0) // + go peer1.serveBlockHashes(2, 1, 0) // peer1.serveBlocks(0, 1, 2) blockPool.Wait(waitTimeout) diff --git a/blockpool/blockpool_util_test.go b/blockpool/blockpool_util_test.go index 02bb2422a..be14fbae8 100644 --- a/blockpool/blockpool_util_test.go +++ b/blockpool/blockpool_util_test.go @@ -66,7 +66,8 @@ func (self *blockPoolTester) Errorf(format string, params ...interface{}) { } // blockPoolTester implements the 3 callbacks needed by the blockPool: -// hasBlock, insetChain, verifyPoW +// hasBlock, insetChain, verifyPoW as well as provides the eventer +// to subscribe to head insertions func (self *blockPoolTester) hasBlock(block common.Hash) (ok bool) { self.lock.RLock() defer self.lock.RUnlock() @@ -77,6 +78,7 @@ func (self *blockPoolTester) hasBlock(block common.Hash) (ok bool) { return } +// mock insertChain relies on refBlockChain to determine block validity func (self *blockPoolTester) insertChain(blocks types.Blocks) error { self.lock.Lock() defer self.lock.Unlock() @@ -127,6 +129,7 @@ func (self *blockPoolTester) insertChain(blocks types.Blocks) error { return nil } +// mock soft block validation always succeeds func (self *blockPoolTester) verifyPoW(pblock pow.Block) bool { return true } @@ -152,24 +155,24 @@ func (self *blockPoolTester) checkBlockChain(blockChain map[int][]int) { } } -// - // peerTester provides the peer callbacks for the blockPool // it registers actual callbacks so that the result can be compared to desired behaviour // provides helper functions to mock the protocol calls to the blockPool type peerTester struct { + // containers to record request and error callbacks blockHashesRequests []int blocksRequests [][]int blocksRequestsMap map[int]bool peerErrors []int - blockPool *BlockPool - hashPool *test.TestHashPool - lock sync.RWMutex - bt *blockPoolTester - id string - td int - currentBlock int - t *testing.T + + blockPool *BlockPool + hashPool *test.TestHashPool + lock sync.RWMutex + bt *blockPoolTester + id string + td int + currentBlock int + t *testing.T } // peerTester constructor takes hashPool and blockPool from the blockPoolTester @@ -222,6 +225,7 @@ func (self *peerTester) checkBlockHashesRequests(blocksHashesRequests ...int) { // waiter function used by peer.serveBlocks // blocking until requests appear +// this mocks proper wire protocol behaviour // since block requests are sent to any random peers // block request map is shared between peers // times out after waitTimeout @@ -254,6 +258,7 @@ func (self *peerTester) waitBlocksRequests(blocksRequest ...int) { // waiter function used by peer.serveBlockHashes // blocking until requests appear +// this mocks proper wire protocol behaviour // times out after a period func (self *peerTester) waitBlockHashesRequests(blocksHashesRequest int) { timeout := time.After(waitTimeout) @@ -299,6 +304,7 @@ func (self *peerTester) serveBlockHashes(indexes ...int) { self.sendBlockHashes(indexes...) } +// peer sends blockhashes not waiting for request func (self *peerTester) sendBlockHashes(indexes ...int) { // fmt.Printf("adding block hashes %v\n", indexes) hashes := self.hashPool.IndexesToHashes(indexes) @@ -315,13 +321,14 @@ func (self *peerTester) sendBlockHashes(indexes ...int) { } // peer sends blocks if and when there is a request -// (in the shared request store, not necessarily to a person) +// (in the shared request store, not necessarily to a specific peer) func (self *peerTester) serveBlocks(indexes ...int) { // fmt.Printf("ready to serve blocks %v\n", indexes[1:]) self.waitBlocksRequests(indexes[1:]...) self.sendBlocks(indexes...) } +// peer sends blocks not waiting for request func (self *peerTester) sendBlocks(indexes ...int) { // fmt.Printf("adding blocks %v \n", indexes) hashes := self.hashPool.IndexesToHashes(indexes) @@ -331,9 +338,10 @@ func (self *peerTester) sendBlocks(indexes ...int) { } } -// peer callbacks -// -1 is special: not found (a hash never seen) +// the 3 mock peer callbacks + // records block hashes requests by the blockPool +// -1 is special: not found (a hash never seen) func (self *peerTester) requestBlockHashes(hash common.Hash) error { indexes := self.hashPool.HashesToIndexes([]common.Hash{hash}) // fmt.Printf("[%s] block hash request %v %x\n", self.id, indexes[0], hash[:4]) diff --git a/blockpool/config_test.go b/blockpool/config_test.go index 2cb93769e..e1ce31f27 100644 --- a/blockpool/config_test.go +++ b/blockpool/config_test.go @@ -23,12 +23,13 @@ func TestBlockPoolConfig(t *testing.T) { test.CheckDuration("BlocksTimeout", c.BlocksTimeout, blocksTimeout, t) test.CheckDuration("IdleBestPeerTimeout", c.IdleBestPeerTimeout, idleBestPeerTimeout, t) test.CheckDuration("PeerSuspensionInterval", c.PeerSuspensionInterval, peerSuspensionInterval, t) + test.CheckDuration("StatusUpdateInterval", c.StatusUpdateInterval, statusUpdateInterval, t) } func TestBlockPoolOverrideConfig(t *testing.T) { test.LogInit() blockPool := &BlockPool{Config: &Config{}, chainEvents: &event.TypeMux{}} - c := &Config{128, 32, 1, 0, 300 * time.Millisecond, 100 * time.Millisecond, 90 * time.Second, 0, 30 * time.Second, 30 * time.Second} + c := &Config{128, 32, 1, 0, 300 * time.Millisecond, 100 * time.Millisecond, 90 * time.Second, 0, 30 * time.Second, 30 * time.Second, 4 * time.Second} blockPool.Config = c blockPool.Start() @@ -42,4 +43,5 @@ func TestBlockPoolOverrideConfig(t *testing.T) { test.CheckDuration("BlocksTimeout", c.BlocksTimeout, blocksTimeout, t) test.CheckDuration("IdleBestPeerTimeout", c.IdleBestPeerTimeout, 30*time.Second, t) test.CheckDuration("PeerSuspensionInterval", c.PeerSuspensionInterval, 30*time.Second, t) + test.CheckDuration("StatusUpdateInterval", c.StatusUpdateInterval, 4*time.Second, t) } diff --git a/blockpool/peers.go b/blockpool/peers.go index 5cc483a3b..1ace01fdf 100644 --- a/blockpool/peers.go +++ b/blockpool/peers.go @@ -11,6 +11,7 @@ import ( "github.com/ethereum/go-ethereum/errs" ) +// the blockpool's model of a peer type peer struct { lock sync.RWMutex @@ -104,12 +105,14 @@ func (self *peers) peerError(id string, code int, format string, params ...inter self.addToBlacklist(id) } +// record time of offence in blacklist to implement suspension for PeerSuspensionInterval func (self *peers) addToBlacklist(id string) { self.lock.Lock() defer self.lock.Unlock() self.blacklist[id] = time.Now() } +// suspended checks if peer is still suspended func (self *peers) suspended(id string) (s bool) { self.lock.Lock() defer self.lock.Unlock() @@ -160,8 +163,8 @@ func (self *peer) setChainInfoFromBlock(block *types.Block) { }() } +// distribute block request among known peers func (self *peers) requestBlocks(attempts int, hashes []common.Hash) { - // distribute block request among known peers self.lock.RLock() defer self.lock.RUnlock() peerCount := len(self.peers) @@ -196,7 +199,9 @@ func (self *peers) requestBlocks(attempts int, hashes []common.Hash) { } // addPeer implements the logic for blockpool.AddPeer -// returns true iff peer is promoted as best peer in the pool +// returns 2 bool values +// 1. true iff peer is promoted as best peer in the pool +// 2. true iff peer is still suspended func (self *peers) addPeer( td *big.Int, currentBlockHash common.Hash, @@ -214,10 +219,13 @@ func (self *peers) addPeer( self.lock.Lock() p, found := self.peers[id] if found { + // when called on an already connected peer, it means a newBlockMsg is received + // peer head info is updated if p.currentBlockHash != currentBlockHash { previousBlockHash = p.currentBlockHash plog.Debugf("addPeer: Update peer <%s> with td %v and current block %s (was %v)", id, td, hex(currentBlockHash), hex(previousBlockHash)) p.setChainInfo(td, currentBlockHash) + self.status.lock.Lock() self.status.values.NewBlocks++ self.status.lock.Unlock() @@ -235,7 +243,7 @@ func (self *peers) addPeer( } self.lock.Unlock() - // check peer current head + // check if peer's current head block is known if self.bp.hasBlock(currentBlockHash) { // peer not ahead plog.Debugf("addPeer: peer <%v> with td %v and current block %s is behind", id, td, hex(currentBlockHash)) @@ -255,6 +263,7 @@ func (self *peers) addPeer( } best = true } else { + // baseline is our own TD currentTD := self.bp.getTD() if self.best != nil { currentTD = self.best.td @@ -314,6 +323,7 @@ func (self *peers) removePeer(id string) { func (self *BlockPool) switchPeer(oldp, newp *peer) { // first quit AddBlockHashes, requestHeadSection and activateChain + // by closing the old peer's switchC channel if oldp != nil { plog.DebugDetailf("<%s> quit peer processes", oldp.id) close(oldp.switchC) @@ -366,11 +376,12 @@ func (self *BlockPool) switchPeer(oldp, newp *peer) { // newp activating section process changes the quit channel for this reason if oldp != nil { plog.DebugDetailf("<%s> quit section processes", oldp.id) - // close(oldp.idleC) } } +// getPeer looks up peer by id, returns peer and a bool value +// that is true iff peer is current best peer func (self *peers) getPeer(id string) (p *peer, best bool) { self.lock.RLock() defer self.lock.RUnlock() @@ -381,6 +392,8 @@ func (self *peers) getPeer(id string) (p *peer, best bool) { return } +// head section process + func (self *peer) handleSection(sec *section) { self.lock.Lock() defer self.lock.Unlock() @@ -516,7 +529,7 @@ func (self *peer) run() { LOOP: for { select { - // to minitor section process behaviou + // to minitor section process behaviour case <-ping.C: plog.Debugf("HeadSection: <%s> section with head %s, idle: %v", self.id, hex(self.currentBlockHash), self.idle) diff --git a/blockpool/peers_test.go b/blockpool/peers_test.go index db83de43a..0e4c40e87 100644 --- a/blockpool/peers_test.go +++ b/blockpool/peers_test.go @@ -142,3 +142,47 @@ func TestAddPeer(t *testing.T) { blockPool.Stop() } + +func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) { + test.LogInit() + _, blockPool, blockPoolTester := newTestBlockPool(t) + blockPoolTester.blockChain[0] = nil + blockPoolTester.initRefBlockChain(4) + peer0 := blockPoolTester.newPeer("peer0", 2, 2) + peer1 := blockPoolTester.newPeer("peer1", 1, 1) + peer2 := blockPoolTester.newPeer("peer2", 4, 4) + + blockPool.Start() + blockPoolTester.tds = make(map[int]int) + blockPoolTester.tds[3] = 3 + + // pool + peer0.AddPeer() + peer0.serveBlocks(1, 2) + best := peer1.AddPeer() + // this tests that peer1 is not promoted over peer0 yet + if best { + t.Errorf("peer1 (TD=1) should not be set as best") + } + best = peer2.AddPeer() + peer2.serveBlocks(3, 4) + peer2.serveBlockHashes(4, 3, 2, 1) + hashes := blockPoolTester.hashPool.IndexesToHashes([]int{2, 3}) + peer1.waitBlocksRequests(3) + blockPool.AddBlock(&types.Block{ + HeaderHash: common.Bytes(hashes[1]), + ParentHeaderHash: common.Bytes(hashes[0]), + Td: common.Big3, + }, "peer1") + + blockPool.RemovePeer("peer2") + if blockPool.peers.best.id != "peer1" { + t.Errorf("peer1 (TD=3) should be set as best") + } + peer1.serveBlocks(0, 1, 2) + + blockPool.Wait(waitTimeout) + blockPool.Stop() + blockPoolTester.refBlockChain[4] = []int{} + blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain) +} diff --git a/blockpool/test/hash_pool.go b/blockpool/test/hash_pool.go index eea135af1..df3c750f9 100644 --- a/blockpool/test/hash_pool.go +++ b/blockpool/test/hash_pool.go @@ -7,8 +7,12 @@ import ( "github.com/ethereum/go-ethereum/crypto" ) -// test helpers -// TODO: move into common test helper package (see p2p/crypto etc.) +// hashPool is a test helper, that allows random hashes to be referred to by integers +type TestHashPool struct { + intToHash + hashToInt + lock sync.Mutex +} func NewHashPool() *TestHashPool { return &TestHashPool{intToHash: make(intToHash), hashToInt: make(hashToInt)} @@ -18,13 +22,6 @@ type intToHash map[int]common.Hash type hashToInt map[common.Hash]int -// hashPool is a test helper, that allows random hashes to be referred to by integers -type TestHashPool struct { - intToHash - hashToInt - lock sync.Mutex -} - func newHash(i int) common.Hash { return common.BytesToHash(crypto.Sha3([]byte(string(i)))) } diff --git a/blockpool/test/logger.go b/blockpool/test/logger.go index 5d26151c1..bcb4d4cb3 100644 --- a/blockpool/test/logger.go +++ b/blockpool/test/logger.go @@ -9,6 +9,8 @@ import ( "github.com/ethereum/go-ethereum/logger" ) +// logging in tests + var once sync.Once /* usage: diff --git a/blockpool/test/util.go b/blockpool/test/util.go index e183bf1d1..0349493c3 100644 --- a/blockpool/test/util.go +++ b/blockpool/test/util.go @@ -6,6 +6,8 @@ import ( "time" ) +// miscellaneous test helpers + func CheckInt(name string, got int, expected int, t *testing.T) (err error) { if got != expected { t.Errorf("status for %v incorrect. expected %v, got %v", name, expected, got) |