From fcb28e4ff35e6bc262bfda23f3779ef3a8e7708a Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 15 Oct 2020 23:18:21 +0200
Subject: v2pai: delete fusefrontend_reverse_v1api

Served its mission a copy-paste source but can now be deleted.
---
 internal/fusefrontend_reverse_v1api/virtualfile.go | 110 ---------------------
 1 file changed, 110 deletions(-)
 delete mode 100644 internal/fusefrontend_reverse_v1api/virtualfile.go

(limited to 'internal/fusefrontend_reverse_v1api/virtualfile.go')

diff --git a/internal/fusefrontend_reverse_v1api/virtualfile.go b/internal/fusefrontend_reverse_v1api/virtualfile.go
deleted file mode 100644
index f258e7f..0000000
--- a/internal/fusefrontend_reverse_v1api/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
-}
-- 
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