138 lines
3.6 KiB
Go
138 lines
3.6 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package model
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import (
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"github.com/syncthing/syncthing/lib/config"
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"github.com/syncthing/syncthing/lib/db"
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"github.com/syncthing/syncthing/lib/events"
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"github.com/syncthing/syncthing/lib/ignore"
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"github.com/syncthing/syncthing/lib/protocol"
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"github.com/syncthing/syncthing/lib/versioner"
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)
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func init() {
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folderFactories[config.FolderTypeSendOnly] = newSendOnlyFolder
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}
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type sendOnlyFolder struct {
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folder
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}
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func newSendOnlyFolder(model *model, fset *db.FileSet, ignores *ignore.Matcher, cfg config.FolderConfiguration, _ versioner.Versioner, evLogger events.Logger, ioLimiter *byteSemaphore) service {
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f := &sendOnlyFolder{
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folder: newFolder(model, fset, ignores, cfg, evLogger, ioLimiter, nil),
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}
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f.folder.puller = f
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return f
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}
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func (f *sendOnlyFolder) PullErrors() []FileError {
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return nil
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}
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// pull checks need for files that only differ by metadata (no changes on disk)
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func (f *sendOnlyFolder) pull() (bool, error) {
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batch := newFileInfoBatch(func(files []protocol.FileInfo) error {
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f.updateLocalsFromPulling(files)
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return nil
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})
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snap, err := f.dbSnapshot()
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if err != nil {
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return false, err
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}
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defer snap.Release()
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snap.WithNeed(protocol.LocalDeviceID, func(intf protocol.FileIntf) bool {
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batch.flushIfFull()
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file := intf.(protocol.FileInfo)
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if f.ignores.ShouldIgnore(intf.FileName()) {
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file.SetIgnored()
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batch.append(file)
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l.Debugln(f, "Handling ignored file", file)
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return true
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}
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curFile, ok := snap.Get(protocol.LocalDeviceID, intf.FileName())
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if !ok {
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if intf.IsInvalid() {
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// Global invalid file just exists for need accounting
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batch.append(file)
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} else if intf.IsDeleted() {
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l.Debugln("Should never get a deleted file as needed when we don't have it")
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f.evLogger.Log(events.Failure, "got deleted file that doesn't exist locally as needed when pulling on send-only")
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}
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return true
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}
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if !file.IsEquivalentOptional(curFile, f.modTimeWindow, f.IgnorePerms, false, 0) {
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return true
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}
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batch.append(file)
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l.Debugln(f, "Merging versions of identical file", file)
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return true
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})
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batch.flush()
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return true, nil
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}
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func (f *sendOnlyFolder) Override() {
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f.doInSync(f.override)
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}
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func (f *sendOnlyFolder) override() error {
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l.Infoln("Overriding global state on folder", f.Description())
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f.setState(FolderScanning)
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defer f.setState(FolderIdle)
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batch := make([]protocol.FileInfo, 0, maxBatchSizeFiles)
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batchSizeBytes := 0
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snap, err := f.dbSnapshot()
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if err != nil {
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return err
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}
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defer snap.Release()
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snap.WithNeed(protocol.LocalDeviceID, func(fi protocol.FileIntf) bool {
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need := fi.(protocol.FileInfo)
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if len(batch) == maxBatchSizeFiles || batchSizeBytes > maxBatchSizeBytes {
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f.updateLocalsFromScanning(batch)
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batch = batch[:0]
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batchSizeBytes = 0
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}
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have, ok := snap.Get(protocol.LocalDeviceID, need.Name)
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// Don't override files that are in a bad state (ignored,
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// unsupported, must rescan, ...).
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if ok && have.IsInvalid() {
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return true
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}
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if !ok || have.Name != need.Name {
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// We are missing the file
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need.SetDeleted(f.shortID)
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} else {
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// We have the file, replace with our version
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have.Version = have.Version.Merge(need.Version).Update(f.shortID)
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need = have
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}
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need.Sequence = 0
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batch = append(batch, need)
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batchSizeBytes += need.ProtoSize()
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return true
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})
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if len(batch) > 0 {
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f.updateLocalsFromScanning(batch)
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}
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return nil
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}
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