Пример #1
0
func ldbWithAllRepoTruncated(db *leveldb.DB, repo []byte, fn func(node []byte, f protocol.FileInfoTruncated) bool) {
	defer runtime.GC()

	start := nodeKey(repo, nil, nil)                                                // before all repo/node files
	limit := nodeKey(repo, protocol.LocalNodeID[:], []byte{0xff, 0xff, 0xff, 0xff}) // after all repo/node files
	snap, err := db.GetSnapshot()
	if err != nil {
		panic(err)
	}
	defer snap.Release()
	dbi := snap.NewIterator(&util.Range{Start: start, Limit: limit}, nil)
	defer dbi.Release()

	for dbi.Next() {
		node := nodeKeyNode(dbi.Key())
		var f protocol.FileInfoTruncated
		err := f.UnmarshalXDR(dbi.Value())
		if err != nil {
			panic(err)
		}
		if cont := fn(node, f); !cont {
			return
		}
	}
}
Пример #2
0
func ldbReplaceWithDelete(db *leveldb.DB, repo, node []byte, fs []protocol.FileInfo) uint64 {
	return ldbGenericReplace(db, repo, node, fs, func(db dbReader, batch dbWriter, repo, node, name []byte, dbi iterator.Iterator) uint64 {
		var tf protocol.FileInfoTruncated
		err := tf.UnmarshalXDR(dbi.Value())
		if err != nil {
			panic(err)
		}
		if !tf.IsDeleted() {
			if debug {
				l.Debugf("mark deleted; repo=%q node=%v name=%q", repo, protocol.NodeIDFromBytes(node), name)
			}
			ts := clock(tf.LocalVersion)
			f := protocol.FileInfo{
				Name:         tf.Name,
				Version:      lamport.Default.Tick(tf.Version),
				LocalVersion: ts,
				Flags:        tf.Flags | protocol.FlagDeleted,
				Modified:     tf.Modified,
			}
			batch.Put(dbi.Key(), f.MarshalXDR())
			ldbUpdateGlobal(db, batch, repo, node, nodeKeyName(dbi.Key()), f.Version)
			return ts
		}
		return 0
	})
}
Пример #3
0
func unmarshalTrunc(bs []byte, truncate bool) (protocol.FileIntf, error) {
	if truncate {
		var tf protocol.FileInfoTruncated
		err := tf.UnmarshalXDR(bs)
		return tf, err
	} else {
		var tf protocol.FileInfo
		err := tf.UnmarshalXDR(bs)
		return tf, err
	}
}
Пример #4
0
func ldbUpdate(db *leveldb.DB, repo, node []byte, fs []protocol.FileInfo) uint64 {
	defer runtime.GC()

	batch := new(leveldb.Batch)
	snap, err := db.GetSnapshot()
	if err != nil {
		panic(err)
	}
	defer snap.Release()

	var maxLocalVer uint64
	for _, f := range fs {
		name := []byte(f.Name)
		fk := nodeKey(repo, node, name)
		bs, err := snap.Get(fk, nil)
		if err == leveldb.ErrNotFound {
			if lv := ldbInsert(batch, repo, node, name, f); lv > maxLocalVer {
				maxLocalVer = lv
			}
			if f.IsInvalid() {
				ldbRemoveFromGlobal(snap, batch, repo, node, name)
			} else {
				ldbUpdateGlobal(snap, batch, repo, node, name, f.Version)
			}
			continue
		}

		var ef protocol.FileInfoTruncated
		err = ef.UnmarshalXDR(bs)
		if err != nil {
			panic(err)
		}
		// Flags might change without the version being bumped when we set the
		// invalid flag on an existing file.
		if ef.Version != f.Version || ef.Flags != f.Flags {
			if lv := ldbInsert(batch, repo, node, name, f); lv > maxLocalVer {
				maxLocalVer = lv
			}
			if f.IsInvalid() {
				ldbRemoveFromGlobal(snap, batch, repo, node, name)
			} else {
				ldbUpdateGlobal(snap, batch, repo, node, name, f.Version)
			}
		}
	}

	err = db.Write(batch, nil)
	if err != nil {
		panic(err)
	}

	return maxLocalVer
}
Пример #5
0
func ldbUpdate(db *leveldb.DB, repo, node []byte, fs []protocol.FileInfo) uint64 {
	defer runtime.GC()

	batch := new(leveldb.Batch)
	snap, err := db.GetSnapshot()
	if err != nil {
		panic(err)
	}
	defer snap.Release()

	var maxLocalVer uint64
	for _, f := range fs {
		name := []byte(f.Name)
		fk := nodeKey(repo, node, name)
		bs, err := snap.Get(fk, nil)
		if err == leveldb.ErrNotFound {
			if lv := ldbInsert(batch, repo, node, name, f); lv > maxLocalVer {
				maxLocalVer = lv
			}
			ldbUpdateGlobal(snap, batch, repo, node, name, f.Version)
			continue
		}

		var ef protocol.FileInfoTruncated
		err = ef.UnmarshalXDR(bs)
		if err != nil {
			panic(err)
		}
		if ef.Version != f.Version {
			if lv := ldbInsert(batch, repo, node, name, f); lv > maxLocalVer {
				maxLocalVer = lv
			}
			ldbUpdateGlobal(snap, batch, repo, node, name, f.Version)
		}
	}

	err = db.Write(batch, nil)
	if err != nil {
		panic(err)
	}

	return maxLocalVer
}
Пример #6
0
func ldbGenericReplace(db *leveldb.DB, repo, node []byte, fs []protocol.FileInfo, deleteFn deletionHandler) uint64 {
	defer runtime.GC()

	sort.Sort(fileList(fs)) // sort list on name, same as on disk

	start := nodeKey(repo, node, nil)                            // before all repo/node files
	limit := nodeKey(repo, node, []byte{0xff, 0xff, 0xff, 0xff}) // after all repo/node files

	batch := new(leveldb.Batch)
	snap, err := db.GetSnapshot()
	if err != nil {
		panic(err)
	}
	defer snap.Release()
	dbi := snap.NewIterator(&util.Range{Start: start, Limit: limit}, nil)
	defer dbi.Release()

	moreDb := dbi.Next()
	fsi := 0
	var maxLocalVer uint64

	for {
		var newName, oldName []byte
		moreFs := fsi < len(fs)

		if !moreDb && !moreFs {
			break
		}

		if !moreFs && deleteFn == nil {
			// We don't have any more updated files to process and deletion
			// has not been requested, so we can exit early
			break
		}

		if moreFs {
			newName = []byte(fs[fsi].Name)
		}

		if moreDb {
			oldName = nodeKeyName(dbi.Key())
		}

		cmp := bytes.Compare(newName, oldName)

		if debug {
			l.Debugf("generic replace; repo=%q node=%v moreFs=%v moreDb=%v cmp=%d newName=%q oldName=%q", repo, protocol.NodeIDFromBytes(node), moreFs, moreDb, cmp, newName, oldName)
		}

		switch {
		case moreFs && (!moreDb || cmp == -1):
			// Disk is missing this file. Insert it.
			if lv := ldbInsert(batch, repo, node, newName, fs[fsi]); lv > maxLocalVer {
				maxLocalVer = lv
			}
			if fs[fsi].IsInvalid() {
				ldbRemoveFromGlobal(snap, batch, repo, node, newName)
			} else {
				ldbUpdateGlobal(snap, batch, repo, node, newName, fs[fsi].Version)
			}
			fsi++

		case moreFs && moreDb && cmp == 0:
			// File exists on both sides - compare versions. We might get an
			// update with the same version and different flags if a node has
			// marked a file as invalid, so handle that too.
			var ef protocol.FileInfoTruncated
			ef.UnmarshalXDR(dbi.Value())
			if fs[fsi].Version > ef.Version || fs[fsi].Version != ef.Version {
				if lv := ldbInsert(batch, repo, node, newName, fs[fsi]); lv > maxLocalVer {
					maxLocalVer = lv
				}
				if fs[fsi].IsInvalid() {
					ldbRemoveFromGlobal(snap, batch, repo, node, newName)
				} else {
					ldbUpdateGlobal(snap, batch, repo, node, newName, fs[fsi].Version)
				}
			}
			// Iterate both sides.
			fsi++
			moreDb = dbi.Next()

		case moreDb && (!moreFs || cmp == 1):
			if deleteFn != nil {
				if lv := deleteFn(snap, batch, repo, node, oldName, dbi); lv > maxLocalVer {
					maxLocalVer = lv
				}
			}
			moreDb = dbi.Next()
		}
	}

	err = db.Write(batch, nil)
	if err != nil {
		panic(err)
	}

	return maxLocalVer
}