syncthing/lib/model/folder_recvenc.go

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// Copyright (C) 2018 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package model
import (
"fmt"
"sort"
"github.com/syncthing/syncthing/lib/config"
"github.com/syncthing/syncthing/lib/db"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/fs"
"github.com/syncthing/syncthing/lib/ignore"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/syncthing/syncthing/lib/util"
"github.com/syncthing/syncthing/lib/versioner"
)
func init() {
folderFactories[config.FolderTypeReceiveEncrypted] = newReceiveEncryptedFolder
}
type receiveEncryptedFolder struct {
*sendReceiveFolder
}
func newReceiveEncryptedFolder(model *model, fset *db.FileSet, ignores *ignore.Matcher, cfg config.FolderConfiguration, ver versioner.Versioner, evLogger events.Logger, ioLimiter *util.Semaphore) service {
f := &receiveEncryptedFolder{newSendReceiveFolder(model, fset, ignores, cfg, ver, evLogger, ioLimiter).(*sendReceiveFolder)}
f.localFlags = protocol.FlagLocalReceiveOnly // gets propagated to the scanner, and set on locally changed files
return f
}
func (f *receiveEncryptedFolder) Revert() {
f.doInSync(f.revert)
}
func (f *receiveEncryptedFolder) revert() error {
l.Infof("Reverting unexpected items in folder %v (receive-encrypted)", f.Description())
f.setState(FolderScanning)
defer f.setState(FolderIdle)
batch := db.NewFileInfoBatch(func(fs []protocol.FileInfo) error {
f.updateLocalsFromScanning(fs)
return nil
})
snap, err := f.dbSnapshot()
if err != nil {
return err
}
defer snap.Release()
var iterErr error
var dirs []string
snap.WithHaveTruncated(protocol.LocalDeviceID, func(intf protocol.FileIntf) bool {
if iterErr = batch.FlushIfFull(); iterErr != nil {
return false
}
fit := intf.(db.FileInfoTruncated)
if !fit.IsReceiveOnlyChanged() || intf.IsDeleted() {
return true
}
if fit.IsDirectory() {
dirs = append(dirs, fit.Name)
return true
}
if err := f.inWritableDir(f.mtimefs.Remove, fit.Name); err != nil && !fs.IsNotExist(err) {
f.newScanError(fit.Name, fmt.Errorf("deleting unexpected item: %w", err))
}
fi := fit.ConvertToDeletedFileInfo(f.shortID)
// Set version to zero, such that we pull the global version in case
// this is a valid filename that was erroneously changed locally.
// Should already be zero from scanning, but lets be safe.
fi.Version = protocol.Vector{}
// Purposely not removing FlagLocalReceiveOnly as the deleted
// item should still not be sent in index updates. However being
// deleted, it will not show up as an unexpected file in the UI
// anymore.
batch.Append(fi)
return true
})
f.revertHandleDirs(dirs, snap)
if iterErr != nil {
return iterErr
}
return batch.Flush()
}
func (f *receiveEncryptedFolder) revertHandleDirs(dirs []string, snap *db.Snapshot) {
if len(dirs) == 0 {
return
}
scanChan := make(chan string)
go f.pullScannerRoutine(scanChan)
defer close(scanChan)
sort.Sort(sort.Reverse(sort.StringSlice(dirs)))
for _, dir := range dirs {
if err := f.deleteDirOnDisk(dir, snap, scanChan); err != nil {
f.newScanError(dir, fmt.Errorf("deleting unexpected dir: %w", err))
}
scanChan <- dir
}
}