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rebuild.go
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rebuild.go
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package filesystem
import (
"errors"
"fmt"
"path"
)
func (fs *FileSystem) rebuildInodePointers() error {
return fs.DirectoryInode.rebuildInodePointers(fs)
}
func (inode *DirectoryInode) rebuildInodePointers(fs *FileSystem) error {
for _, dirent := range inode.EntryList {
tableInode, ok := fs.InodeTable[dirent.InodeNumber]
if !ok {
return fmt.Errorf("%s: no entry in inode table for: %d %p",
dirent.Name, dirent.InodeNumber, dirent.inode)
}
if tableInode == nil {
return fmt.Errorf("%s: nil entry in inode table for: %d %p",
dirent.Name, dirent.InodeNumber, dirent.inode)
} else if dirent.inode != nil && dirent.inode != tableInode {
return fmt.Errorf(
"%s: changing inode entry for: %d from: %p to %p\n",
dirent.Name, dirent.InodeNumber, dirent.inode, tableInode)
}
dirent.inode = tableInode
if inode, ok := dirent.inode.(*DirectoryInode); ok {
if err := inode.rebuildInodePointers(fs); err != nil {
return errors.New(dirent.Name + "/" + err.Error())
}
}
}
return nil
}
func (fs *FileSystem) buildInodeToFilenamesTable() InodeToFilenamesTable {
if fs.inodeToFilenamesTable == nil {
fs.inodeToFilenamesTable = make(InodeToFilenamesTable)
fs.DirectoryInode.buildInodeToFilenamesTable(fs, "/")
}
return fs.inodeToFilenamesTable
}
func (inode *DirectoryInode) buildInodeToFilenamesTable(fs *FileSystem,
name string) {
for _, dirent := range inode.EntryList {
name := path.Join(name, dirent.Name)
fs.inodeToFilenamesTable[dirent.InodeNumber] = append(
fs.inodeToFilenamesTable[dirent.InodeNumber], name)
if inode, ok := dirent.inode.(*DirectoryInode); ok {
inode.buildInodeToFilenamesTable(fs, name)
}
}
}
func (fs *FileSystem) buildFilenameToInodeTable() FilenameToInodeTable {
if fs.filenameToInodeTable == nil {
fs.filenameToInodeTable = make(map[string]uint64)
for inum, filenames := range fs.InodeToFilenamesTable() {
for _, filename := range filenames {
fs.filenameToInodeTable[filename] = inum
}
}
}
return fs.filenameToInodeTable
}
func (fs *FileSystem) buildHashToInodesTable() HashToInodesTable {
if fs.hashToInodesTable == nil {
fs.hashToInodesTable = make(HashToInodesTable)
for inum, inode := range fs.InodeTable {
if inode, ok := inode.(*RegularInode); ok && inode.Size > 0 {
fs.hashToInodesTable[inode.Hash] = append(
fs.hashToInodesTable[inode.Hash], inum)
}
}
}
return fs.hashToInodesTable
}
func (fs *FileSystem) computeTotalDataBytes() {
fs.NumRegularInodes = 0
fs.TotalDataBytes = 0
for _, inode := range fs.InodeTable {
if inode, ok := inode.(*RegularInode); ok {
fs.NumRegularInodes++
fs.TotalDataBytes += uint64(inode.Size)
}
}
}
func (fs *FileSystem) computeNumComputedRegularInodes() uint64 {
if fs.numComputedRegularInodes == nil {
var numInodes uint64
for _, inode := range fs.InodeTable {
if _, ok := inode.(*ComputedRegularInode); ok {
numInodes++
}
}
fs.numComputedRegularInodes = &numInodes
}
return *fs.numComputedRegularInodes
}
func (inode *DirectoryInode) buildEntryMap() {
inode.EntriesByName = make(map[string]*DirectoryEntry)
for _, dirent := range inode.EntryList {
inode.EntriesByName[dirent.Name] = dirent
if inode, ok := dirent.inode.(*DirectoryInode); ok {
inode.buildEntryMap()
}
}
}
func (inode *DirectoryInode) replaceStrings(replaceFunc func(string) string) {
if inode.EntriesByName != nil {
inode.EntriesByName = make(map[string]*DirectoryEntry,
len(inode.EntryList))
}
for _, dirent := range inode.EntryList {
dirent.Name = replaceFunc(dirent.Name)
if inode.EntriesByName != nil {
inode.EntriesByName[dirent.Name] = dirent
}
if inode, ok := dirent.inode.(*DirectoryInode); ok {
inode.replaceStrings(replaceFunc)
}
}
}