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builder.go
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builder.go
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package core
import (
"context"
"crypto/rand"
"encoding/base64"
"errors"
"os"
"syscall"
"time"
bstore "github.com/ipfs/go-ipfs/blocks/blockstore"
bserv "github.com/ipfs/go-ipfs/blockservice"
offline "github.com/ipfs/go-ipfs/exchange/offline"
filestore "github.com/ipfs/go-ipfs/filestore"
dag "github.com/ipfs/go-ipfs/merkledag"
path "github.com/ipfs/go-ipfs/path"
pin "github.com/ipfs/go-ipfs/pin"
repo "github.com/ipfs/go-ipfs/repo"
cfg "github.com/ipfs/go-ipfs/repo/config"
uio "github.com/ipfs/go-ipfs/unixfs/io"
ci "gx/ipfs/QmPGxZ1DP2w45WcogpW1h43BvseXbfke9N91qotpoQcUeS/go-libp2p-crypto"
ds "gx/ipfs/QmRWDav6mzWseLWeYfVd5fvUKiVe9xNH29YfMF438fG364/go-datastore"
dsync "gx/ipfs/QmRWDav6mzWseLWeYfVd5fvUKiVe9xNH29YfMF438fG364/go-datastore/sync"
metrics "gx/ipfs/QmRg1gKTHzc3CZXSKzem8aR4E3TubFhbgXwfVuWnSK5CC5/go-metrics-interface"
goprocessctx "gx/ipfs/QmSF8fPo3jgVBAy8fpdjjYqgG87dkJgUprRBHRd2tmfgpP/goprocess/context"
retry "gx/ipfs/QmUaGhKyLgTuYDdQsbKST1tYr2CVoix59rqaxdxqk2UbfK/retry-datastore"
peer "gx/ipfs/QmWUswjn261LSyVxWAEpMVtPdy8zmKBJJfBpG3Qdpa8ZsE/go-libp2p-peer"
pstore "gx/ipfs/Qme1g4e3m2SmdiSGGU3vSWmUStwUjc5oECnEriaK9Xa1HU/go-libp2p-peerstore"
)
type BuildCfg struct {
// If online is set, the node will have networking enabled
Online bool
// ExtraOpts is a map of extra options used to configure the ipfs nodes creation
ExtraOpts map[string]bool
// If permament then node should run more expensive processes
// that will improve performance in long run
Permament bool
// If NilRepo is set, a repo backed by a nil datastore will be constructed
NilRepo bool
Routing RoutingOption
Host HostOption
Repo repo.Repo
}
func (cfg *BuildCfg) getOpt(key string) bool {
if cfg.ExtraOpts == nil {
return false
}
return cfg.ExtraOpts[key]
}
func (cfg *BuildCfg) fillDefaults() error {
if cfg.Repo != nil && cfg.NilRepo {
return errors.New("cannot set a repo and specify nilrepo at the same time")
}
if cfg.Repo == nil {
var d ds.Datastore
d = ds.NewMapDatastore()
if cfg.NilRepo {
d = ds.NewNullDatastore()
}
r, err := defaultRepo(dsync.MutexWrap(d))
if err != nil {
return err
}
cfg.Repo = r
}
if cfg.Routing == nil {
cfg.Routing = DHTOption
}
if cfg.Host == nil {
cfg.Host = DefaultHostOption
}
return nil
}
func defaultRepo(dstore repo.Datastore) (repo.Repo, error) {
c := cfg.Config{}
priv, pub, err := ci.GenerateKeyPairWithReader(ci.RSA, 1024, rand.Reader)
if err != nil {
return nil, err
}
pid, err := peer.IDFromPublicKey(pub)
if err != nil {
return nil, err
}
privkeyb, err := priv.Bytes()
if err != nil {
return nil, err
}
c.Bootstrap = cfg.DefaultBootstrapAddresses
c.Addresses.Swarm = []string{"/ip4/0.0.0.0/tcp/4001"}
c.Identity.PeerID = pid.Pretty()
c.Identity.PrivKey = base64.StdEncoding.EncodeToString(privkeyb)
return &repo.Mock{
D: dstore,
C: c,
}, nil
}
func NewNode(ctx context.Context, cfg *BuildCfg) (*IpfsNode, error) {
if cfg == nil {
cfg = new(BuildCfg)
}
err := cfg.fillDefaults()
if err != nil {
return nil, err
}
ctx = metrics.CtxScope(ctx, "ipfs")
n := &IpfsNode{
mode: offlineMode,
Repo: cfg.Repo,
ctx: ctx,
Peerstore: pstore.NewPeerstore(),
}
if cfg.Online {
n.mode = onlineMode
}
// TODO: this is a weird circular-ish dependency, rework it
n.proc = goprocessctx.WithContextAndTeardown(ctx, n.teardown)
if err := setupNode(ctx, n, cfg); err != nil {
n.Close()
return nil, err
}
return n, nil
}
func isTooManyFDError(err error) bool {
perr, ok := err.(*os.PathError)
if ok && perr.Err == syscall.EMFILE {
return true
}
return false
}
func setupNode(ctx context.Context, n *IpfsNode, cfg *BuildCfg) error {
// setup local peer ID (private key is loaded in online setup)
if err := n.loadID(); err != nil {
return err
}
rds := &retry.Datastore{
Batching: n.Repo.Datastore(),
Delay: time.Millisecond * 200,
Retries: 6,
TempErrFunc: isTooManyFDError,
}
bs := bstore.NewBlockstore(rds)
opts := bstore.DefaultCacheOpts()
conf, err := n.Repo.Config()
if err != nil {
return err
}
// TEMP: setting global sharding switch here
uio.UseHAMTSharding = conf.Experimental.ShardingEnabled
opts.HasBloomFilterSize = conf.Datastore.BloomFilterSize
if !cfg.Permament {
opts.HasBloomFilterSize = 0
}
cbs, err := bstore.CachedBlockstore(ctx, bs, opts)
if err != nil {
return err
}
n.BaseBlocks = cbs
n.GCLocker = bstore.NewGCLocker()
n.Blockstore = bstore.NewGCBlockstore(cbs, n.GCLocker)
if conf.Experimental.FilestoreEnabled {
n.Filestore = filestore.NewFilestore(bs, n.Repo.FileManager())
n.Blockstore = bstore.NewGCBlockstore(n.Filestore, n.GCLocker)
}
rcfg, err := n.Repo.Config()
if err != nil {
return err
}
if rcfg.Datastore.HashOnRead {
bs.HashOnRead(true)
}
if cfg.Online {
do := setupDiscoveryOption(rcfg.Discovery)
if err := n.startOnlineServices(ctx, cfg.Routing, cfg.Host, do, cfg.getOpt("pubsub"), cfg.getOpt("mplex")); err != nil {
return err
}
} else {
n.Exchange = offline.Exchange(n.Blockstore)
}
n.Blocks = bserv.New(n.Blockstore, n.Exchange)
n.DAG = dag.NewDAGService(n.Blocks)
internalDag := dag.NewDAGService(bserv.New(n.Blockstore, offline.Exchange(n.Blockstore)))
n.Pinning, err = pin.LoadPinner(n.Repo.Datastore(), n.DAG, internalDag)
if err != nil {
// TODO: we should move towards only running 'NewPinner' explicity on
// node init instead of implicitly here as a result of the pinner keys
// not being found in the datastore.
// this is kinda sketchy and could cause data loss
n.Pinning = pin.NewPinner(n.Repo.Datastore(), n.DAG, internalDag)
}
n.Resolver = path.NewBasicResolver(n.DAG)
err = n.loadFilesRoot()
if err != nil {
return err
}
return nil
}