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fusefrontend: Introduce a openBackingPath helper and use it to simplify Mknod and Symlink

This commit is contained in:
Sebastian Lackner 2017-11-28 01:11:19 +01:00 committed by rfjakob
parent ad2720e0f9
commit eba49402e4
2 changed files with 17 additions and 12 deletions
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14
internal/fusefrontend/fs.go
View File

@ -278,17 +278,12 @@ func (fs *FS) Mknod(path string, mode uint32, dev uint32, context *fuse.Context)
if fs.isFiltered(path) {
return fuse.EPERM
}
cPath, err := fs.getBackingPath(path)
if err != nil {
return fuse.ToStatus(err)
}
dirfd, err := os.Open(filepath.Dir(cPath))
dirfd, cName, err := fs.openBackingPath(path)
if err != nil {
return fuse.ToStatus(err)
}
defer dirfd.Close()
// Create ".name" file to store long file name (except in PlaintextNames mode)
cName := filepath.Base(cPath)
if !fs.args.PlaintextNames && nametransform.IsLongContent(cName) {
err = fs.nameTransform.WriteLongName(dirfd, cName, path)
if err != nil {
@ -423,11 +418,7 @@ func (fs *FS) Symlink(target string, linkName string, context *fuse.Context) (co
if fs.isFiltered(linkName) {
return fuse.EPERM
}
cPath, err := fs.getBackingPath(linkName)
if err != nil {
return fuse.ToStatus(err)
}
dirfd, err := os.Open(filepath.Dir(cPath))
dirfd, cName, err := fs.openBackingPath(linkName)
if err != nil {
return fuse.ToStatus(err)
}
@ -439,7 +430,6 @@ func (fs *FS) Symlink(target string, linkName string, context *fuse.Context) (co
cTarget = fs.nameTransform.B64.EncodeToString(cBinTarget)
}
// Create ".name" file to store long file name (except in PlaintextNames mode)
cName := filepath.Base(cPath)
if !fs.args.PlaintextNames && nametransform.IsLongContent(cName) {
err = fs.nameTransform.WriteLongName(dirfd, cName, linkName)
if err != nil {

15
internal/fusefrontend/names.go
View File

@ -3,6 +3,7 @@ package fusefrontend
// This file forwards file encryption operations to cryptfs
import (
"os"
"path/filepath"
"github.com/rfjakob/gocryptfs/internal/configfile"
@ -39,6 +40,20 @@ func (fs *FS) getBackingPath(relPath string) (string, error) {
return cAbsPath, nil
}
// openBackingPath - get the absolute encrypted path of the backing file
// and open the corresponding directory
func (fs *FS) openBackingPath(relPath string) (*os.File, string, error) {
cPath, err := fs.getBackingPath(relPath)
if err != nil {
return nil, "", err
}
dirfd, err := os.Open(filepath.Dir(cPath))
if err != nil {
return nil, "", err
}
return dirfd, filepath.Base(cPath), nil
}
// encryptPath - encrypt relative plaintext path
func (fs *FS) encryptPath(plainPath string) (string, error) {
if fs.args.PlaintextNames {