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lib/model: Treat failed rename like del&update (#5203)

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This commit is contained in:
Simon Frei 2018-10-10 11:37:20 +02:00 committed by Jakob Borg
parent b50d57b7fd
commit 523ac45456
1 changed files with 29 additions and 39 deletions
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68
lib/model/folder_sendrecv.go
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@ -474,10 +474,14 @@ nextFile:
// desired state with the delete bit set is in the deletion
// map.
desired := fileDeletions[candidate.Name]
// Remove the pending deletion (as we perform it by renaming)
delete(fileDeletions, candidate.Name)
if err := f.renameFile(candidate, desired, fi, dbUpdateChan, scanChan); err != nil {
// Failed to rename, try to handle files as separate
// deletions and updates.
break
}
f.renameFile(candidate, desired, fi, dbUpdateChan, scanChan)
// Remove the pending deletion (as we performed it by renaming)
delete(fileDeletions, candidate.Name)
f.queue.Done(fileName)
continue nextFile
@ -812,7 +816,7 @@ func (f *sendReceiveFolder) deleteFile(file protocol.FileInfo, scanChan chan<- s
// renameFile attempts to rename an existing file to a destination
// and set the right attributes on it.
func (f *sendReceiveFolder) renameFile(cur, source, target protocol.FileInfo, dbUpdateChan chan<- dbUpdateJob, scanChan chan<- string) {
func (f *sendReceiveFolder) renameFile(cur, source, target protocol.FileInfo, dbUpdateChan chan<- dbUpdateJob, scanChan chan<- string) error {
// Used in the defer closure below, updated by the function body. Take
// care not declare another err.
var err error
@ -851,9 +855,7 @@ func (f *sendReceiveFolder) renameFile(cur, source, target protocol.FileInfo, db
// Check that source is compatible with what we have in the DB
if err = f.checkToBeDeleted(cur, scanChan); err != nil {
err = fmt.Errorf("from %s: %s", source.Name, err.Error())
f.newError("rename check source", target.Name, err)
return
return err
}
// Check that the target corresponds to what we have in the DB
curTarget, ok := f.model.CurrentFolderFile(f.folderID, target.Name)
@ -882,9 +884,7 @@ func (f *sendReceiveFolder) renameFile(cur, source, target protocol.FileInfo, db
}
}
if err != nil {
err = fmt.Errorf("from %s: %s", source.Name, err.Error())
f.newError("rename check target", target.Name, err)
return
return err
}
tempName := fs.TempName(target.Name)
@ -900,36 +900,26 @@ func (f *sendReceiveFolder) renameFile(cur, source, target protocol.FileInfo, db
} else {
err = osutil.TryRename(f.fs, source.Name, tempName)
}
if err == nil {
blockStatsMut.Lock()
blockStats["total"] += len(target.Blocks)
blockStats["renamed"] += len(target.Blocks)
blockStatsMut.Unlock()
// The file was renamed, so we have handled both the necessary delete
// of the source and the creation of the target. Fix-up the metadata,
// update the local index of the target file and rename from temp to real name.
dbUpdateChan <- dbUpdateJob{source, dbUpdateDeleteFile}
if err = f.performFinish(nil, target, curTarget, true, tempName, dbUpdateChan, scanChan); err != nil {
return
}
} else {
// We failed the rename so we have a source file that we still need to
// get rid of. Attempt to delete it instead so that we make *some*
// progress. The target is unhandled.
err = osutil.InWritableDir(f.fs.Remove, f.fs, source.Name)
if err != nil {
err = fmt.Errorf("from %s: %s", source.Name, err.Error())
f.newError("rename delete", target.Name, err)
return
}
dbUpdateChan <- dbUpdateJob{source, dbUpdateDeleteFile}
if err != nil {
return err
}
blockStatsMut.Lock()
blockStats["total"] += len(target.Blocks)
blockStats["renamed"] += len(target.Blocks)
blockStatsMut.Unlock()
// The file was renamed, so we have handled both the necessary delete
// of the source and the creation of the target temp file. Fix-up the metadata,
// update the local index of the target file and rename from temp to real name.
if err = f.performFinish(nil, target, curTarget, true, tempName, dbUpdateChan, scanChan); err != nil {
return err
}
dbUpdateChan <- dbUpdateJob{source, dbUpdateDeleteFile}
return nil
}
// This is the flow of data and events here, I think...