diff options
Diffstat (limited to 'internal/fusefrontend_reverse/virtualfile.go')
| -rw-r--r-- | internal/fusefrontend_reverse/virtualfile.go | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/internal/fusefrontend_reverse/virtualfile.go b/internal/fusefrontend_reverse/virtualfile.go index 2bd9e88..00fa726 100644 --- a/internal/fusefrontend_reverse/virtualfile.go +++ b/internal/fusefrontend_reverse/virtualfile.go @@ -9,6 +9,18 @@ import ( "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 + // virtualInoBase is the start of the inode number range that is used + // for virtual files. + // The value 10^19 is just below 2^60. A power of 10 has been chosen so the + // "ls -li" output (which is base-10) is easy to read. + // 10^19 is the largest power of 10 that is smaller than UINT64_MAX/2. + virtualInoBase = uint64(1000000000000000000) +) + func (rfs *ReverseFS) newDirIVFile(cRelPath string) (nodefs.File, fuse.Status) { cDir := saneDir(cRelPath) absDir, err := rfs.abs(rfs.decryptPath(cDir)) @@ -25,8 +37,6 @@ type virtualFile struct { content []byte // absolute path to a parent file parentFile string - // inode number - ino uint64 } // newVirtualFile creates a new in-memory file that does not have a representation @@ -38,7 +48,6 @@ func (rfs *ReverseFS) newVirtualFile(content []byte, parentFile string) (nodefs. File: nodefs.NewDefaultFile(), content: content, parentFile: parentFile, - ino: rfs.inoGen.next(), }, fuse.OK } @@ -62,7 +71,12 @@ func (f *virtualFile) GetAttr(a *fuse.Attr) fuse.Status { tlog.Debug.Printf("GetAttr: Lstat %q: %v\n", f.parentFile, err) return fuse.ToStatus(err) } - st.Ino = f.ino + if st.Ino > virtualInoBase { + tlog.Warn.Printf("virtualFile.GetAttr: parent file inode number %d crosses reserved space, max=%d. Returning EOVERFLOW.", + st.Ino, virtualInoBase) + return fuse.ToStatus(syscall.EOVERFLOW) + } + st.Ino = st.Ino + virtualInoBase st.Size = int64(len(f.content)) st.Mode = virtualFileMode st.Nlink = 1 |