func addDirectory(dirent, oldDirent *filesystem.DirectoryEntry,
fileSystem, oldFS *FileSystem,
directoryPathName string, stat *syscall.Stat_t) error {
myPathName := path.Join(directoryPathName, dirent.Name)
if stat.Ino == fileSystem.inodeNumber {
return errors.New("Recursive directory: " + myPathName)
}
if _, ok := fileSystem.InodeTable[stat.Ino]; ok {
return errors.New("Hardlinked directory: " + myPathName)
}
inode := new(filesystem.DirectoryInode)
dirent.SetInode(inode)
fileSystem.InodeTable[stat.Ino] = inode
inode.Mode = filesystem.FileMode(stat.Mode)
inode.Uid = stat.Uid
inode.Gid = stat.Gid
var oldInode *filesystem.DirectoryInode
if oldDirent != nil {
if oi, ok := oldDirent.Inode().(*filesystem.DirectoryInode); ok {
oldInode = oi
}
}
err, copied := scanDirectory(inode, oldInode, fileSystem, oldFS, myPathName)
if err != nil {
return err
}
if copied && filesystem.CompareDirectoriesMetadata(inode, oldInode, nil) {
dirent.SetInode(oldInode)
fileSystem.InodeTable[stat.Ino] = oldInode
}
fileSystem.DirectoryCount++
return nil
}
func makeDirectory(request *subproto.UpdateRequest,
requiredInode *filesystem.DirectoryInode, pathName string, create bool) {
var newInode subproto.Inode
newInode.Name = pathName
var newDirectoryInode filesystem.DirectoryInode
newDirectoryInode.Mode = requiredInode.Mode
newDirectoryInode.Uid = requiredInode.Uid
newDirectoryInode.Gid = requiredInode.Gid
newInode.GenericInode = &newDirectoryInode
if create {
request.DirectoriesToMake = append(request.DirectoriesToMake, newInode)
} else {
request.InodesToChange = append(request.InodesToChange, newInode)
}
}
func (decoderData *decoderData) addDirectory(header *tar.Header,
parent *filesystem.DirectoryInode, name string) error {
var newInode filesystem.DirectoryInode
newInode.Mode = filesystem.FileMode((header.Mode & ^syscall.S_IFMT) |
syscall.S_IFDIR)
newInode.Uid = uint32(header.Uid)
newInode.Gid = uint32(header.Gid)
if header.Name == "/" {
*decoderData.directoryTable[header.Name] = newInode
return nil
}
decoderData.addEntry(parent, header.Name, name, &newInode)
decoderData.directoryTable[header.Name] = &newInode
return nil
}
func (decoderData *decoderData) addEntry(parent *filesystem.DirectoryInode,
fullName, name string, inode filesystem.GenericInode) {
var newEntry filesystem.DirectoryEntry
newEntry.Name = name
newEntry.InodeNumber = decoderData.nextInodeNumber
newEntry.SetInode(inode)
parent.EntryList = append(parent.EntryList, &newEntry)
decoderData.addInode(fullName, inode)
}
func sortDirectory(directory *filesystem.DirectoryInode) {
var entryList directoryEntryList
entryList = directory.EntryList
sort.Sort(entryList)
directory.EntryList = entryList
// Recurse through directories.
for _, dirent := range directory.EntryList {
if inode, ok := dirent.Inode().(*filesystem.DirectoryInode); ok {
sortDirectory(inode)
}
}
}
func (decoderData *decoderData) addHardlink(header *tar.Header,
parent *filesystem.DirectoryInode, name string) error {
header.Linkname = normaliseFilename(header.Linkname)
if inum, ok := decoderData.inodeTable[header.Linkname]; ok {
var newEntry filesystem.DirectoryEntry
newEntry.Name = name
newEntry.InodeNumber = inum
parent.EntryList = append(parent.EntryList, &newEntry)
} else {
return errors.New(fmt.Sprintf("missing hardlink target: %s",
header.Linkname))
}
return nil
}
func scanDirectory(directory, oldDirectory *filesystem.DirectoryInode,
fileSystem, oldFS *FileSystem, myPathName string) (error, bool) {
file, err := os.Open(path.Join(fileSystem.rootDirectoryName, myPathName))
if err != nil {
return err, false
}
names, err := file.Readdirnames(-1)
file.Close()
if err != nil {
return err, false
}
sort.Strings(names)
entryList := make([]*filesystem.DirectoryEntry, 0, len(names))
var copiedDirents int
for _, name := range names {
if directory == &fileSystem.DirectoryInode && name == ".subd" {
continue
}
filename := path.Join(myPathName, name)
if fileSystem.configuration.ScanFilter.Match(filename) {
continue
}
var stat syscall.Stat_t
err := syscall.Lstat(path.Join(fileSystem.rootDirectoryName, filename),
&stat)
if err != nil {
if err == syscall.ENOENT {
continue
}
return err, false
}
if stat.Dev != fileSystem.dev {
continue
}
if checkScanDisableRequest() {
return errors.New("DisableScan"), false
}
myGC()
dirent := new(filesystem.DirectoryEntry)
dirent.Name = name
dirent.InodeNumber = stat.Ino
var oldDirent *filesystem.DirectoryEntry
if oldDirectory != nil {
index := len(entryList)
if len(oldDirectory.EntryList) > index &&
oldDirectory.EntryList[index].Name == name {
oldDirent = oldDirectory.EntryList[index]
}
}
if stat.Mode&syscall.S_IFMT == syscall.S_IFDIR {
err = addDirectory(dirent, oldDirent, fileSystem, oldFS, myPathName,
&stat)
} else if stat.Mode&syscall.S_IFMT == syscall.S_IFREG {
err = addRegularFile(dirent, fileSystem, oldFS, myPathName, &stat)
} else if stat.Mode&syscall.S_IFMT == syscall.S_IFLNK {
err = addSymlink(dirent, fileSystem, oldFS, myPathName, &stat)
} else if stat.Mode&syscall.S_IFMT == syscall.S_IFSOCK {
continue
} else {
err = addSpecialFile(dirent, fileSystem, oldFS, &stat)
}
if err != nil {
if err == syscall.ENOENT {
continue
}
return err, false
}
if oldDirent != nil && *dirent == *oldDirent {
dirent = oldDirent
copiedDirents++
}
entryList = append(entryList, dirent)
}
if oldDirectory != nil && len(entryList) == copiedDirents &&
len(entryList) == len(oldDirectory.EntryList) {
directory.EntryList = oldDirectory.EntryList
return nil, true
} else {
directory.EntryList = entryList
return nil, false
}
}