package fusefrontend_reverse import ( "context" "syscall" "golang.org/x/sys/unix" "github.com/hanwen/go-fuse/v2/fs" "github.com/hanwen/go-fuse/v2/fuse" "github.com/rfjakob/gocryptfs/internal/syscallcompat" ) // Node is a file or directory in the filesystem tree // in a `gocryptfs -reverse` mount. type Node struct { fs.Inode } // Lookup - FUSE call for discovering a file. // TODO handle virtual files func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (ch *fs.Inode, errno syscall.Errno) { dirfd, cName, errno := n.prepareAtSyscall(name) if errno != 0 { return } defer syscall.Close(dirfd) // Get device number and inode number into `st` st, err := syscallcompat.Fstatat2(dirfd, cName, unix.AT_SYMLINK_NOFOLLOW) if err != nil { return nil, fs.ToErrno(err) } // Create new inode and fill `out` ch = n.newChild(ctx, st, out) // Translate ciphertext size in `out.Attr.Size` to plaintext size n.translateSize(dirfd, cName, &out.Attr) return ch, 0 } // GetAttr - FUSE call for stat()ing a file. // // GetAttr is symlink-safe through use of openBackingDir() and Fstatat(). func (n *Node) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) (errno syscall.Errno) { // If the kernel gives us a file handle, use it. if f != nil { return f.(fs.FileGetattrer).Getattr(ctx, out) } dirfd, cName, errno := n.prepareAtSyscall("") if errno != 0 { return } defer syscall.Close(dirfd) st, err := syscallcompat.Fstatat2(dirfd, cName, unix.AT_SYMLINK_NOFOLLOW) if err != nil { return fs.ToErrno(err) } // Fix inode number rn := n.rootNode() rn.inoMap.TranslateStat(st) out.Attr.FromStat(st) // Translate ciphertext size in `out.Attr.Size` to plaintext size n.translateSize(dirfd, cName, &out.Attr) if rn.args.ForceOwner != nil { out.Owner = *rn.args.ForceOwner } return 0 }