9ed3d05172
License: MIT Signed-off-by: Hector Sanjuan <hector@protocol.ai>
311 lines
5.7 KiB
Go
311 lines
5.7 KiB
Go
package ipfscluster
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import (
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"context"
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"sync"
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"time"
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peer "github.com/libp2p/go-libp2p-peer"
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cid "github.com/ipfs/go-cid"
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)
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// A Pin or Unpin operation will be considered failed
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// if the Cid has stayed in Pinning or Unpinning state
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// for longer than these values.
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var (
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PinningTimeout = 15 * time.Minute
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UnpinningTimeout = 10 * time.Second
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)
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const (
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PinError = iota
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UnpinError
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Pinned
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Pinning
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Unpinning
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Unpinned
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RemotePin
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)
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type GlobalPinInfo struct {
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Cid *cid.Cid
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Status map[peer.ID]PinInfo
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}
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// PinInfo holds information about local pins. PinInfo is
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// serialized when requesting the Global status, therefore
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// we cannot use *cid.Cid.
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type PinInfo struct {
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CidStr string
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Peer peer.ID
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IPFS IPFSStatus
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TS time.Time
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}
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type IPFSStatus int
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func (st IPFSStatus) String() string {
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switch st {
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case PinError:
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return "pin_error"
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case UnpinError:
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return "unpin_error"
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case Pinned:
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return "pinned"
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case Pinning:
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return "pinning"
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case Unpinning:
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return "unpinning"
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case Unpinned:
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return "unpinned"
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}
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return ""
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}
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type MapPinTracker struct {
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mux sync.RWMutex
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status map[string]PinInfo
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ctx context.Context
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rpcCh chan RPC
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peerID peer.ID
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shutdownLock sync.Mutex
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shutdown bool
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shutdownCh chan struct{}
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wg sync.WaitGroup
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}
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func NewMapPinTracker(cfg *Config) *MapPinTracker {
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ctx := context.Background()
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pID, err := peer.IDB58Decode(cfg.ID)
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if err != nil {
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panic(err)
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}
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mpt := &MapPinTracker{
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ctx: ctx,
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status: make(map[string]PinInfo),
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rpcCh: make(chan RPC, RPCMaxQueue),
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peerID: pID,
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shutdownCh: make(chan struct{}),
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}
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logger.Info("starting MapPinTracker")
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mpt.run()
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return mpt
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}
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func (mpt *MapPinTracker) run() {
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mpt.wg.Add(1)
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go func() {
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defer mpt.wg.Done()
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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mpt.ctx = ctx
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<-mpt.shutdownCh
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}()
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}
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func (mpt *MapPinTracker) Shutdown() error {
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mpt.shutdownLock.Lock()
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defer mpt.shutdownLock.Unlock()
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if mpt.shutdown {
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logger.Debug("already shutdown")
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return nil
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}
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logger.Info("stopping MapPinTracker")
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mpt.shutdownCh <- struct{}{}
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mpt.wg.Wait()
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mpt.shutdown = true
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return nil
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}
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func (mpt *MapPinTracker) unsafeSet(c *cid.Cid, s IPFSStatus) {
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if s == Unpinned {
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delete(mpt.status, c.String())
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return
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}
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mpt.status[c.String()] = PinInfo{
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// cid: c,
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CidStr: c.String(),
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Peer: mpt.peerID,
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IPFS: s,
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TS: time.Now(),
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}
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}
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func (mpt *MapPinTracker) set(c *cid.Cid, s IPFSStatus) {
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mpt.mux.Lock()
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defer mpt.mux.Unlock()
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mpt.unsafeSet(c, s)
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}
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func (mpt *MapPinTracker) unsafeGet(c *cid.Cid) PinInfo {
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p, ok := mpt.status[c.String()]
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if !ok {
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return PinInfo{
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CidStr: c.String(),
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Peer: mpt.peerID,
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IPFS: Unpinned,
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TS: time.Now(),
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}
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}
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return p
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}
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func (mpt *MapPinTracker) get(c *cid.Cid) PinInfo {
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mpt.mux.RLock()
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defer mpt.mux.RUnlock()
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return mpt.unsafeGet(c)
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}
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func (mpt *MapPinTracker) pin(c *cid.Cid) error {
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ctx, cancel := context.WithCancel(mpt.ctx)
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defer cancel()
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mpt.set(c, Pinning)
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resp := MakeRPC(ctx, mpt.rpcCh, NewRPC(IPFSPinRPC, c), true)
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if resp.Error != nil {
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mpt.set(c, PinError)
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return resp.Error
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}
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mpt.set(c, Pinned)
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return nil
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}
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func (mpt *MapPinTracker) unpin(c *cid.Cid) error {
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ctx, cancel := context.WithCancel(mpt.ctx)
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defer cancel()
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mpt.set(c, Unpinning)
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resp := MakeRPC(ctx, mpt.rpcCh, NewRPC(IPFSUnpinRPC, c), true)
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if resp.Error != nil {
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mpt.set(c, UnpinError)
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return resp.Error
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}
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mpt.set(c, Unpinned)
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return nil
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}
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func (mpt *MapPinTracker) Track(c *cid.Cid) error {
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return mpt.pin(c)
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}
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func (mpt *MapPinTracker) Untrack(c *cid.Cid) error {
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return mpt.unpin(c)
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}
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func (mpt *MapPinTracker) StatusCid(c *cid.Cid) PinInfo {
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return mpt.get(c)
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}
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func (mpt *MapPinTracker) Status() []PinInfo {
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mpt.mux.Lock()
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defer mpt.mux.Unlock()
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pins := make([]PinInfo, 0, len(mpt.status))
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for _, v := range mpt.status {
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pins = append(pins, v)
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}
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return pins
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}
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func (mpt *MapPinTracker) Sync(c *cid.Cid) bool {
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ctx, cancel := context.WithCancel(mpt.ctx)
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defer cancel()
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p := mpt.get(c)
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resp := MakeRPC(ctx, mpt.rpcCh, NewRPC(IPFSIsPinnedRPC, c), true)
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if resp.Error != nil {
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switch p.IPFS {
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case Pinned, Pinning:
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mpt.set(c, PinError)
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return true
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case Unpinned, Unpinning:
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mpt.set(c, UnpinError)
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return true
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case PinError, UnpinError:
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return true
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default:
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return false
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}
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}
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ipfsPinned, ok := resp.Data.(bool)
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if !ok {
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logger.Error("wrong type of IPFSIsPinnedRPC response")
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return false
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}
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if ipfsPinned {
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switch p.IPFS {
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case Pinned:
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return false
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case Pinning, PinError:
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mpt.set(c, Pinned)
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return true
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case Unpinning:
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if time.Since(p.TS) > UnpinningTimeout {
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mpt.set(c, UnpinError)
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return true
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}
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return false
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case Unpinned, UnpinError:
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mpt.set(c, UnpinError)
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return true
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default:
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return false
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}
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} else {
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switch p.IPFS {
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case Pinned, PinError:
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mpt.set(c, PinError)
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return true
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case Pinning:
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if time.Since(p.TS) > PinningTimeout {
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mpt.set(c, PinError)
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return true
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}
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return false
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case Unpinning, UnpinError:
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mpt.set(c, Unpinned)
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return true
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case Unpinned:
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return false
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default:
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return false
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}
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}
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}
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// Recover will re-track or re-untrack a Cid in error state,
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// possibly retriggering an IPFS pinning operation and returning
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// only when it is done.
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func (mpt *MapPinTracker) Recover(c *cid.Cid) error {
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p := mpt.get(c)
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if p.IPFS != PinError && p.IPFS != UnpinError {
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return nil
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}
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logger.Infof("Recovering %s", c)
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var err error
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if p.IPFS == PinError {
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err = mpt.Track(c)
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}
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if p.IPFS == UnpinError {
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err = mpt.Untrack(c)
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}
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if err != nil {
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logger.Errorf("error recovering %s: %s", c, err)
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return err
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}
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return nil
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}
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func (mpt *MapPinTracker) RpcChan() <-chan RPC {
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return mpt.rpcCh
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}
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