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Diffstat (limited to 'internal/fusefrontend_reverse/virtualfile.go')
-rw-r--r--internal/fusefrontend_reverse/virtualfile.go110
1 files changed, 0 insertions, 110 deletions
diff --git a/internal/fusefrontend_reverse/virtualfile.go b/internal/fusefrontend_reverse/virtualfile.go
deleted file mode 100644
index f258e7f..0000000
--- a/internal/fusefrontend_reverse/virtualfile.go
+++ /dev/null
@@ -1,110 +0,0 @@
-package fusefrontend_reverse
-
-import (
- "log"
- "path/filepath"
- "syscall"
-
- "golang.org/x/sys/unix"
-
- "github.com/hanwen/go-fuse/v2/fuse"
- "github.com/hanwen/go-fuse/v2/fuse/nodefs"
-
- "github.com/rfjakob/gocryptfs/internal/inomap"
- "github.com/rfjakob/gocryptfs/internal/nametransform"
- "github.com/rfjakob/gocryptfs/internal/pathiv"
- "github.com/rfjakob/gocryptfs/internal/syscallcompat"
- "github.com/rfjakob/gocryptfs/internal/tlog"
-)
-
-const (
- // virtualFileMode is the mode to use for virtual files (gocryptfs.diriv and
- // *.name). They are always readable, as stated in func Access
- virtualFileMode = syscall.S_IFREG | 0444
- // We use inomap's `Tag` feature to generate unique inode numbers for
- // virtual files. These are the tags we use.
- inoTagDirIV = 1
- inoTagNameFile = 2
-)
-
-func (rfs *ReverseFS) newDirIVFile(cRelPath string) (nodefs.File, fuse.Status) {
- cDir := nametransform.Dir(cRelPath)
- dir, err := rfs.decryptPath(cDir)
- if err != nil {
- return nil, fuse.ToStatus(err)
- }
- iv := pathiv.Derive(cDir, pathiv.PurposeDirIV)
- return rfs.newVirtualFile(iv, rfs.args.Cipherdir, dir, inoTagDirIV)
-}
-
-type virtualFile struct {
- // Embed nodefs.defaultFile for a ENOSYS implementation of all methods
- nodefs.File
- // pointer to parent filesystem
- rfs *ReverseFS
- // file content
- content []byte
- // backing directory
- cipherdir string
- // path to a parent file (relative to cipherdir)
- parentFile string
- // inomap `Tag`.
- // Depending on the file type, either `inoTagDirIV` or `inoTagNameFile`.
- inoTag uint8
-}
-
-// newVirtualFile creates a new in-memory file that does not have a representation
-// on disk. "content" is the file content. Timestamps and file owner are copied
-// from "parentFile" (plaintext path relative to "cipherdir").
-// For a "gocryptfs.diriv" file, you would use the parent directory as
-// "parentFile".
-func (rfs *ReverseFS) newVirtualFile(content []byte, cipherdir string, parentFile string, inoTag uint8) (nodefs.File, fuse.Status) {
- if inoTag == 0 {
- log.Panicf("BUG: inoTag for virtual file is zero - this will cause ino collisions!")
- }
- return &virtualFile{
- File: nodefs.NewDefaultFile(),
- rfs: rfs,
- content: content,
- cipherdir: cipherdir,
- parentFile: parentFile,
- inoTag: inoTag,
- }, fuse.OK
-}
-
-// Read - FUSE call
-func (f *virtualFile) Read(buf []byte, off int64) (resultData fuse.ReadResult, status fuse.Status) {
- if off >= int64(len(f.content)) {
- return nil, fuse.OK
- }
- end := int(off) + len(buf)
- if end > len(f.content) {
- end = len(f.content)
- }
- return fuse.ReadResultData(f.content[off:end]), fuse.OK
-}
-
-// GetAttr - FUSE call
-func (f *virtualFile) GetAttr(a *fuse.Attr) fuse.Status {
- dir := filepath.Dir(f.parentFile)
- dirfd, err := syscallcompat.OpenDirNofollow(f.cipherdir, dir)
- if err != nil {
- return fuse.ToStatus(err)
- }
- defer syscall.Close(dirfd)
- name := filepath.Base(f.parentFile)
- var st2 unix.Stat_t
- err = syscallcompat.Fstatat(dirfd, name, &st2, unix.AT_SYMLINK_NOFOLLOW)
- if err != nil {
- tlog.Debug.Printf("GetAttr: Fstatat %q: %v\n", f.parentFile, err)
- return fuse.ToStatus(err)
- }
- st := syscallcompat.Unix2syscall(st2)
- q := inomap.NewQIno(uint64(st.Dev), f.inoTag, uint64(st.Ino))
- st.Ino = f.rfs.inoMap.Translate(q)
- st.Size = int64(len(f.content))
- st.Mode = virtualFileMode
- st.Nlink = 1
- a.FromStat(&st)
- return fuse.OK
-}