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package mount
import ( "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/util" "github.com/hanwen/go-fuse/v2/fuse" "sync" )
type InodeToPath struct { sync.RWMutex nextInodeId uint64 inode2path map[uint64]*InodeEntry path2inode map[util.FullPath]uint64 } type InodeEntry struct { util.FullPath nlookup uint64 isDirectory bool isChildrenCached bool }
func NewInodeToPath(root util.FullPath) *InodeToPath { t := &InodeToPath{ inode2path: make(map[uint64]*InodeEntry), path2inode: make(map[util.FullPath]uint64), } t.inode2path[1] = &InodeEntry{root, 1, true, false} t.path2inode[root] = 1 return t }
func (i *InodeToPath) Lookup(path util.FullPath, unixTime int64, isDirectory bool, isHardlink bool, possibleInode uint64, isLookup bool) uint64 { i.Lock() defer i.Unlock() inode, found := i.path2inode[path] if !found { if possibleInode == 0 { inode = path.AsInode(unixTime) } else { inode = possibleInode } if !isHardlink { for _, found := i.inode2path[inode]; found; inode++ { _, found = i.inode2path[inode] } } } i.path2inode[path] = inode
if _, found := i.inode2path[inode]; found { if isLookup { i.inode2path[inode].nlookup++ } } else { if !isLookup { i.inode2path[inode] = &InodeEntry{path, 0, isDirectory, false} } else { i.inode2path[inode] = &InodeEntry{path, 1, isDirectory, false} } }
return inode }
func (i *InodeToPath) AllocateInode(path util.FullPath, unixTime int64) uint64 { if path == "/" { return 1 } i.Lock() defer i.Unlock() inode := path.AsInode(unixTime) for _, found := i.inode2path[inode]; found; inode++ { _, found = i.inode2path[inode] } return inode }
func (i *InodeToPath) GetInode(path util.FullPath) uint64 { if path == "/" { return 1 } i.Lock() defer i.Unlock() inode, found := i.path2inode[path] if !found { // glog.Fatalf("GetInode unknown inode for %s", path)
// this could be the parent for mount point
} return inode }
func (i *InodeToPath) GetPath(inode uint64) (util.FullPath, fuse.Status) { i.RLock() defer i.RUnlock() path, found := i.inode2path[inode] if !found { return "", fuse.ENOENT } return path.FullPath, fuse.OK }
func (i *InodeToPath) HasPath(path util.FullPath) bool { i.RLock() defer i.RUnlock() _, found := i.path2inode[path] return found }
func (i *InodeToPath) MarkChildrenCached(fullpath util.FullPath) { i.RLock() defer i.RUnlock() inode, found := i.path2inode[fullpath] if !found { glog.Fatalf("MarkChildrenCached not found inode %v", fullpath) } path, found := i.inode2path[inode] path.isChildrenCached = true }
func (i *InodeToPath) IsChildrenCached(fullpath util.FullPath) bool { i.RLock() defer i.RUnlock() inode, found := i.path2inode[fullpath] if !found { return false } path, found := i.inode2path[inode] if found { return path.isChildrenCached } return false }
func (i *InodeToPath) HasInode(inode uint64) bool { if inode == 1 { return true } i.RLock() defer i.RUnlock() _, found := i.inode2path[inode] return found }
func (i *InodeToPath) RemovePath(path util.FullPath) { i.Lock() defer i.Unlock() inode, found := i.path2inode[path] if found { delete(i.path2inode, path) delete(i.inode2path, inode) } }
func (i *InodeToPath) MovePath(sourcePath, targetPath util.FullPath) (sourceInode, targetInode uint64) { i.Lock() defer i.Unlock() sourceInode, sourceFound := i.path2inode[sourcePath] targetInode, targetFound := i.path2inode[targetPath] if targetFound { delete(i.inode2path, targetInode) delete(i.path2inode, targetPath) } if sourceFound { delete(i.path2inode, sourcePath) i.path2inode[targetPath] = sourceInode } else { // it is possible some source folder items has not been visited before
// so no need to worry about their source inodes
return } if entry, entryFound := i.inode2path[sourceInode]; entryFound { entry.FullPath = targetPath entry.isChildrenCached = false if !targetFound { entry.nlookup++ } } else { glog.Errorf("MovePath %s to %s: sourceInode %d not found", sourcePath, targetPath, sourceInode) } return }
func (i *InodeToPath) Forget(inode, nlookup uint64, onForgetDir func(dir util.FullPath)) { i.Lock() path, found := i.inode2path[inode] if found { path.nlookup -= nlookup if path.nlookup <= 0 { delete(i.path2inode, path.FullPath) delete(i.inode2path, inode) } } i.Unlock() if found { if path.isDirectory && path.nlookup <= 0 && onForgetDir != nil { path.isChildrenCached = false onForgetDir(path.FullPath) } } }
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