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// Copyright (C) 2014 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 (
"github.com/syncthing/syncthing/lib/config"
"github.com/syncthing/syncthing/lib/db"
"github.com/syncthing/syncthing/lib/fs"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/syncthing/syncthing/lib/versioner"
)
func init() {
folderFactories[config.FolderTypeSendOnly] = newSendOnlyFolder
}
type sendOnlyFolder struct {
folder
}
func newSendOnlyFolder(model *Model, cfg config.FolderConfiguration, _ versioner.Versioner, _ fs.Filesystem) service {
f := &sendOnlyFolder{
folder: newFolder(model, cfg),
}
f.folder.puller = f
return f
}
func (f *sendOnlyFolder) PullErrors() []FileError {
return nil
}
// pull checks need for files that only differ by metadata (no changes on disk)
func (f *sendOnlyFolder) pull() bool {
select {
case <-f.initialScanFinished:
default:
// Once the initial scan finished, a pull will be scheduled
return false
}
f.model.fmut.RLock()
folderFiles := f.model.folderFiles[f.folderID]
ignores := f.model.folderIgnores[f.folderID]
f.model.fmut.RUnlock()
batch := make([]protocol.FileInfo, 0, maxBatchSizeFiles)
batchSizeBytes := 0
folderFiles.WithNeed(protocol.LocalDeviceID, func(intf db.FileIntf) bool {
if len(batch) == maxBatchSizeFiles || batchSizeBytes > maxBatchSizeBytes {
f.model.updateLocalsFromPulling(f.folderID, batch)
batch = batch[:0]
batchSizeBytes = 0
}
if ignores.ShouldIgnore(intf.FileName()) {
file := intf.(protocol.FileInfo)
file.SetIgnored(f.shortID)
batch = append(batch, file)
batchSizeBytes += file.ProtoSize()
l.Debugln(f, "Handling ignored file", file)
return true
}
curFile, ok := f.model.CurrentFolderFile(f.folderID, intf.FileName())
if !ok {
if intf.IsDeleted() {
panic("Should never get a deleted file as needed when we don't have it")
}
return true
}
file := intf.(protocol.FileInfo)
if !file.IsEquivalentOptional(curFile, f.IgnorePerms, false, 0) {
return true
}
file.Version = file.Version.Merge(curFile.Version)
batch = append(batch, file)
batchSizeBytes += file.ProtoSize()
l.Debugln(f, "Merging versions of identical file", file)
return true
})
if len(batch) > 0 {
f.model.updateLocalsFromPulling(f.folderID, batch)
}
return true
}
func (f *sendOnlyFolder) Override(fs *db.FileSet, updateFn func([]protocol.FileInfo)) {
f.setState(FolderScanning)
batch := make([]protocol.FileInfo, 0, maxBatchSizeFiles)
batchSizeBytes := 0
fs.WithNeed(protocol.LocalDeviceID, func(fi db.FileIntf) bool {
need := fi.(protocol.FileInfo)
if len(batch) == maxBatchSizeFiles || batchSizeBytes > maxBatchSizeBytes {
updateFn(batch)
batch = batch[:0]
batchSizeBytes = 0
}
have, ok := fs.Get(protocol.LocalDeviceID, need.Name)
// Don't override files that are in a bad state (ignored,
// unsupported, must rescan, ...).
if ok && have.IsInvalid() {
return true
}
if !ok || have.Name != need.Name {
// We are missing the file
need.Deleted = true
need.Blocks = nil
need.Version = need.Version.Update(f.shortID)
need.Size = 0
} else {
// We have the file, replace with our version
have.Version = have.Version.Merge(need.Version).Update(f.shortID)
need = have
}
need.Sequence = 0
batch = append(batch, need)
batchSizeBytes += need.ProtoSize()
return true
})
if len(batch) > 0 {
updateFn(batch)
}
f.setState(FolderIdle)
}
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