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-rw-r--r--internal/fusefrontend/fs.go82
-rw-r--r--internal/fusefrontend/fs_dir.go49
-rw-r--r--internal/fusefrontend/names.go9
3 files changed, 69 insertions, 71 deletions
diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go
index 0e198d6..71d550e 100644
--- a/internal/fusefrontend/fs.go
+++ b/internal/fusefrontend/fs.go
@@ -129,7 +129,7 @@ func (fs *FS) Open(path string, flags uint32, context *fuse.Context) (fuseFile n
if err != nil {
return nil, fuse.ToStatus(err)
}
- fd, err := syscallcompat.Openat(int(dirfd.Fd()), cName, newFlags, 0)
+ fd, err := syscallcompat.Openat(dirfd, cName, newFlags, 0)
// Handle a few specific errors
if err != nil {
if err == syscall.EMFILE {
@@ -150,8 +150,8 @@ func (fs *FS) Open(path string, flags uint32, context *fuse.Context) (fuseFile n
// problem if the file permissions do not allow reading (i.e. 0200 permissions).
// This function works around that problem by chmod'ing the file, obtaining a fd,
// and chmod'ing it back.
-func (fs *FS) openWriteOnlyFile(dirfd *os.File, cName string, newFlags int) (fuseFile nodefs.File, status fuse.Status) {
- woFd, err := syscallcompat.Openat(int(dirfd.Fd()), cName, syscall.O_WRONLY|syscall.O_NOFOLLOW, 0)
+func (fs *FS) openWriteOnlyFile(dirfd int, cName string, newFlags int) (fuseFile nodefs.File, status fuse.Status) {
+ woFd, err := syscallcompat.Openat(dirfd, cName, syscall.O_WRONLY|syscall.O_NOFOLLOW, 0)
if err != nil {
return nil, fuse.ToStatus(err)
}
@@ -186,7 +186,7 @@ func (fs *FS) openWriteOnlyFile(dirfd *os.File, cName string, newFlags int) (fus
tlog.Warn.Printf("openWriteOnlyFile: reverting permissions failed: %v", err2)
}
}()
- rwFd, err := syscallcompat.Openat(int(dirfd.Fd()), cName, newFlags, 0)
+ rwFd, err := syscallcompat.Openat(dirfd, cName, newFlags, 0)
if err != nil {
return nil, fuse.ToStatus(err)
}
@@ -210,12 +210,12 @@ func (fs *FS) Create(path string, flags uint32, mode uint32, context *fuse.Conte
// Handle long file name
if !fs.args.PlaintextNames && nametransform.IsLongContent(cName) {
- var dirfd *os.File
- dirfd, err = os.Open(filepath.Dir(cPath))
+ var dirfd int
+ dirfd, err = syscall.Open(filepath.Dir(cPath), syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
return nil, fuse.ToStatus(err)
}
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
// Create ".name"
err = fs.nameTransform.WriteLongName(dirfd, cName, path)
@@ -225,7 +225,7 @@ func (fs *FS) Create(path string, flags uint32, mode uint32, context *fuse.Conte
// Create content
var fdRaw int
- fdRaw, err = syscallcompat.Openat(int(dirfd.Fd()), cName, newFlags|os.O_CREATE|os.O_EXCL, mode)
+ fdRaw, err = syscallcompat.Openat(dirfd, cName, newFlags|os.O_CREATE|os.O_EXCL, mode)
if err != nil {
nametransform.DeleteLongName(dirfd, cName)
return nil, fuse.ToStatus(err)
@@ -257,10 +257,10 @@ func (fs *FS) Chmod(path string, mode uint32, context *fuse.Context) (code fuse.
if err != nil {
return fuse.ToStatus(err)
}
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
// os.Chmod goes through the "syscallMode" translation function that messes
// up the suid and sgid bits. So use a syscall directly.
- err = syscallcompat.Fchmodat(int(dirfd.Fd()), cName, mode, unix.AT_SYMLINK_NOFOLLOW)
+ err = syscallcompat.Fchmodat(dirfd, cName, mode, unix.AT_SYMLINK_NOFOLLOW)
return fuse.ToStatus(err)
}
@@ -273,8 +273,8 @@ func (fs *FS) Chown(path string, uid uint32, gid uint32, context *fuse.Context)
if err != nil {
return fuse.ToStatus(err)
}
- defer dirfd.Close()
- code = fuse.ToStatus(syscallcompat.Fchownat(int(dirfd.Fd()), cName, int(uid), int(gid), unix.AT_SYMLINK_NOFOLLOW))
+ defer syscall.Close(dirfd)
+ code = fuse.ToStatus(syscallcompat.Fchownat(dirfd, cName, int(uid), int(gid), unix.AT_SYMLINK_NOFOLLOW))
if !code.Ok() {
return code
}
@@ -284,7 +284,7 @@ func (fs *FS) Chown(path string, uid uint32, gid uint32, context *fuse.Context)
// Instead of checking if "cName" is a directory, we just blindly
// execute the chown on "cName/gocryptfs.diriv" and ignore errors.
dirIVPath := filepath.Join(cName, nametransform.DirIVFilename)
- syscallcompat.Fchownat(int(dirfd.Fd()), dirIVPath, int(uid), int(gid), unix.AT_SYMLINK_NOFOLLOW)
+ syscallcompat.Fchownat(dirfd, dirIVPath, int(uid), int(gid), unix.AT_SYMLINK_NOFOLLOW)
}
return fuse.OK
}
@@ -298,7 +298,7 @@ func (fs *FS) Mknod(path string, mode uint32, dev uint32, context *fuse.Context)
if err != nil {
return fuse.ToStatus(err)
}
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
// Create ".name" file to store long file name (except in PlaintextNames mode)
if !fs.args.PlaintextNames && nametransform.IsLongContent(cName) {
err = fs.nameTransform.WriteLongName(dirfd, cName, path)
@@ -306,20 +306,20 @@ func (fs *FS) Mknod(path string, mode uint32, dev uint32, context *fuse.Context)
return fuse.ToStatus(err)
}
// Create "gocryptfs.longfile." device node
- err = syscallcompat.Mknodat(int(dirfd.Fd()), cName, mode, int(dev))
+ err = syscallcompat.Mknodat(dirfd, cName, mode, int(dev))
if err != nil {
nametransform.DeleteLongName(dirfd, cName)
}
} else {
// Create regular device node
- err = syscallcompat.Mknodat(int(dirfd.Fd()), cName, mode, int(dev))
+ err = syscallcompat.Mknodat(dirfd, cName, mode, int(dev))
}
if err != nil {
return fuse.ToStatus(err)
}
// Set owner
if fs.args.PreserveOwner {
- err = syscallcompat.Fchownat(int(dirfd.Fd()), cName, int(context.Owner.Uid),
+ err = syscallcompat.Fchownat(dirfd, cName, int(context.Owner.Uid),
int(context.Owner.Gid), unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
tlog.Warn.Printf("Mknod: Fchownat failed: %v", err)
@@ -416,9 +416,9 @@ func (fs *FS) Unlink(path string, context *fuse.Context) (code fuse.Status) {
if err != nil {
return fuse.ToStatus(err)
}
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
// Delete content
- err = syscallcompat.Unlinkat(int(dirfd.Fd()), cName, 0)
+ err = syscallcompat.Unlinkat(dirfd, cName, 0)
if err != nil {
return fuse.ToStatus(err)
}
@@ -454,7 +454,7 @@ func (fs *FS) Symlink(target string, linkName string, context *fuse.Context) (co
if err != nil {
return fuse.ToStatus(err)
}
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
cTarget := target
if !fs.args.PlaintextNames {
// Symlinks are encrypted like file contents (GCM) and base64-encoded
@@ -467,20 +467,20 @@ func (fs *FS) Symlink(target string, linkName string, context *fuse.Context) (co
return fuse.ToStatus(err)
}
// Create "gocryptfs.longfile." symlink
- err = syscallcompat.Symlinkat(cTarget, int(dirfd.Fd()), cName)
+ err = syscallcompat.Symlinkat(cTarget, dirfd, cName)
if err != nil {
nametransform.DeleteLongName(dirfd, cName)
}
} else {
// Create symlink
- err = syscallcompat.Symlinkat(cTarget, int(dirfd.Fd()), cName)
+ err = syscallcompat.Symlinkat(cTarget, dirfd, cName)
}
if err != nil {
return fuse.ToStatus(err)
}
// Set owner
if fs.args.PreserveOwner {
- err = syscallcompat.Fchownat(int(dirfd.Fd()), cName, int(context.Owner.Uid),
+ err = syscallcompat.Fchownat(dirfd, cName, int(context.Owner.Uid),
int(context.Owner.Gid), unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
tlog.Warn.Printf("Symlink: Fchownat failed: %v", err)
@@ -510,32 +510,32 @@ func (fs *FS) Rename(oldPath string, newPath string, context *fuse.Context) (cod
return fuse.ToStatus(syscall.Rename(cOldPath, cNewPath))
}
// Handle long source file name
- var oldDirFd *os.File
- var finalOldDirFd int
+ oldDirFd := -1
+ finalOldDirFd := -1
var finalOldPath = cOldPath
cOldName := filepath.Base(cOldPath)
if nametransform.IsLongContent(cOldName) {
- oldDirFd, err = os.Open(filepath.Dir(cOldPath))
+ oldDirFd, err = syscall.Open(filepath.Dir(cOldPath), syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
return fuse.ToStatus(err)
}
- defer oldDirFd.Close()
- finalOldDirFd = int(oldDirFd.Fd())
+ defer syscall.Close(oldDirFd)
+ finalOldDirFd = oldDirFd
// Use relative path
finalOldPath = cOldName
}
// Handle long destination file name
- var newDirFd *os.File
- var finalNewDirFd int
- var finalNewPath = cNewPath
+ newDirFd := -1
+ finalNewDirFd := -1
+ finalNewPath := cNewPath
cNewName := filepath.Base(cNewPath)
if nametransform.IsLongContent(cNewName) {
- newDirFd, err = os.Open(filepath.Dir(cNewPath))
+ newDirFd, err = syscall.Open(filepath.Dir(cNewPath), syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
return fuse.ToStatus(err)
}
- defer newDirFd.Close()
- finalNewDirFd = int(newDirFd.Fd())
+ defer syscall.Close(newDirFd)
+ finalNewDirFd = newDirFd
// Use relative path
finalNewPath = cNewName
// Create destination .name file
@@ -545,7 +545,7 @@ func (fs *FS) Rename(oldPath string, newPath string, context *fuse.Context) (cod
// file anyway. We still set newDirFd to nil to ensure that we do not delete
// the file on error.
if err == syscall.EEXIST {
- newDirFd = nil
+ newDirFd = -1
} else if err != nil {
return fuse.ToStatus(err)
}
@@ -565,13 +565,13 @@ func (fs *FS) Rename(oldPath string, newPath string, context *fuse.Context) (cod
}
}
if err != nil {
- if newDirFd != nil {
+ if newDirFd >= 0 {
// Roll back .name creation
nametransform.DeleteLongName(newDirFd, cNewName)
}
return fuse.ToStatus(err)
}
- if oldDirFd != nil {
+ if oldDirFd >= 0 {
nametransform.DeleteLongName(oldDirFd, cOldName)
}
return fuse.OK
@@ -586,12 +586,12 @@ func (fs *FS) Link(oldPath string, newPath string, context *fuse.Context) (code
if err != nil {
return fuse.ToStatus(err)
}
- defer oldDirFd.Close()
+ defer syscall.Close(oldDirFd)
newDirFd, cNewName, err := fs.openBackingDir(newPath)
if err != nil {
return fuse.ToStatus(err)
}
- defer newDirFd.Close()
+ defer syscall.Close(newDirFd)
// Handle long file name (except in PlaintextNames mode)
if !fs.args.PlaintextNames && nametransform.IsLongContent(cNewName) {
err = fs.nameTransform.WriteLongName(newDirFd, cNewName, newPath)
@@ -599,13 +599,13 @@ func (fs *FS) Link(oldPath string, newPath string, context *fuse.Context) (code
return fuse.ToStatus(err)
}
// Create "gocryptfs.longfile." link
- err = syscallcompat.Linkat(int(oldDirFd.Fd()), cOldName, int(newDirFd.Fd()), cNewName, 0)
+ err = syscallcompat.Linkat(oldDirFd, cOldName, newDirFd, cNewName, 0)
if err != nil {
nametransform.DeleteLongName(newDirFd, cNewName)
}
} else {
// Create regular link
- err = syscallcompat.Linkat(int(oldDirFd.Fd()), cOldName, int(newDirFd.Fd()), cNewName, 0)
+ err = syscallcompat.Linkat(oldDirFd, cOldName, newDirFd, cNewName, 0)
}
return fuse.ToStatus(err)
}
diff --git a/internal/fusefrontend/fs_dir.go b/internal/fusefrontend/fs_dir.go
index b9266dd..df22100 100644
--- a/internal/fusefrontend/fs_dir.go
+++ b/internal/fusefrontend/fs_dir.go
@@ -26,7 +26,7 @@ const dsStoreName = ".DS_Store"
// mkdirWithIv - create a new directory and corresponding diriv file. dirfd
// should be a handle to the parent directory, cName is the name of the new
// directory and mode specifies the access permissions to use.
-func (fs *FS) mkdirWithIv(dirfd *os.File, cName string, mode uint32) error {
+func (fs *FS) mkdirWithIv(dirfd int, cName string, mode uint32) error {
// Between the creation of the directory and the creation of gocryptfs.diriv
// the directory is inconsistent. Take the lock to prevent other readers
// from seeing it.
@@ -34,14 +34,14 @@ func (fs *FS) mkdirWithIv(dirfd *os.File, cName string, mode uint32) error {
// The new directory may take the place of an older one that is still in the cache
fs.nameTransform.DirIVCache.Clear()
defer fs.dirIVLock.Unlock()
- err := syscallcompat.Mkdirat(int(dirfd.Fd()), cName, mode)
+ err := syscallcompat.Mkdirat(dirfd, cName, mode)
if err != nil {
return err
}
// Create gocryptfs.diriv
err = nametransform.WriteDirIV(dirfd, cName)
if err != nil {
- err2 := syscallcompat.Unlinkat(int(dirfd.Fd()), cName, unix.AT_REMOVEDIR)
+ err2 := syscallcompat.Unlinkat(dirfd, cName, unix.AT_REMOVEDIR)
if err2 != nil {
tlog.Warn.Printf("mkdirWithIv: rollback failed: %v", err2)
}
@@ -58,12 +58,12 @@ func (fs *FS) Mkdir(newPath string, mode uint32, context *fuse.Context) (code fu
if err != nil {
return fuse.ToStatus(err)
}
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
if fs.args.PlaintextNames {
- err = syscallcompat.Mkdirat(int(dirfd.Fd()), cName, mode)
+ err = syscallcompat.Mkdirat(dirfd, cName, mode)
// Set owner
if fs.args.PreserveOwner {
- err = syscallcompat.Fchownat(int(dirfd.Fd()), cName, int(context.Owner.Uid),
+ err = syscallcompat.Fchownat(dirfd, cName, int(context.Owner.Uid),
int(context.Owner.Gid), unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
tlog.Warn.Printf("Mkdir: Fchownat failed: %v", err)
@@ -98,19 +98,19 @@ func (fs *FS) Mkdir(newPath string, mode uint32, context *fuse.Context) (code fu
}
// Set permissions back to what the user wanted
if origMode != mode {
- err = syscallcompat.Fchmodat(int(dirfd.Fd()), cName, origMode, unix.AT_SYMLINK_NOFOLLOW)
+ err = syscallcompat.Fchmodat(dirfd, cName, origMode, unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
tlog.Warn.Printf("Mkdir: Fchmodat failed: %v", err)
}
}
// Set owner
if fs.args.PreserveOwner {
- err = syscallcompat.Fchownat(int(dirfd.Fd()), cName, int(context.Owner.Uid),
+ err = syscallcompat.Fchownat(dirfd, cName, int(context.Owner.Uid),
int(context.Owner.Gid), unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
tlog.Warn.Printf("Mkdir: Fchownat 1 failed: %v", err)
}
- err = syscallcompat.Fchownat(int(dirfd.Fd()), filepath.Join(cName, nametransform.DirIVFilename),
+ err = syscallcompat.Fchownat(dirfd, filepath.Join(cName, nametransform.DirIVFilename),
int(context.Owner.Uid), int(context.Owner.Gid), unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
tlog.Warn.Printf("Mkdir: Fchownat 2 failed: %v", err)
@@ -120,9 +120,9 @@ func (fs *FS) Mkdir(newPath string, mode uint32, context *fuse.Context) (code fu
}
// haveDsstore return true if one of the entries in "names" is ".DS_Store".
-func haveDsstore(names []string) bool {
- for _, n := range names {
- if n == dsStoreName {
+func haveDsstore(entries []fuse.DirEntry) bool {
+ for _, e := range entries {
+ if e.Name == dsStoreName {
return true
}
}
@@ -140,14 +140,14 @@ func (fs *FS) Rmdir(path string, context *fuse.Context) (code fuse.Status) {
return fuse.ToStatus(err)
}
parentDir := filepath.Dir(cPath)
- parentDirFd, err := os.Open(parentDir)
+ parentDirFd, err := syscall.Open(parentDir, syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
return fuse.ToStatus(err)
}
- defer parentDirFd.Close()
+ defer syscall.Close(parentDirFd)
cName := filepath.Base(cPath)
- dirfdRaw, err := syscallcompat.Openat(int(parentDirFd.Fd()), cName,
+ dirfd, err := syscallcompat.Openat(parentDirFd, cName,
syscall.O_RDONLY|syscall.O_NOFOLLOW, 0)
if err == syscall.EACCES {
// We need permission to read and modify the directory
@@ -169,7 +169,7 @@ func (fs *FS) Rmdir(path string, context *fuse.Context) (code fuse.Status) {
// Retry open
var st syscall.Stat_t
syscall.Lstat(cPath, &st)
- dirfdRaw, err = syscallcompat.Openat(int(parentDirFd.Fd()), cName,
+ dirfd, err = syscallcompat.Openat(parentDirFd, cName,
syscall.O_RDONLY|syscall.O_NOFOLLOW, 0)
// Undo the chmod if removing the directory failed
defer func() {
@@ -185,11 +185,10 @@ func (fs *FS) Rmdir(path string, context *fuse.Context) (code fuse.Status) {
tlog.Debug.Printf("Rmdir: Open: %v", err)
return fuse.ToStatus(err)
}
- dirfd := os.NewFile(uintptr(dirfdRaw), cName)
- defer dirfd.Close()
+ defer syscall.Close(dirfd)
retry:
// Check directory contents
- children, err := dirfd.Readdirnames(10)
+ children, err := syscallcompat.Getdents(dirfd)
if err == io.EOF {
// The directory is empty
tlog.Warn.Printf("Rmdir: %q: gocryptfs.diriv is missing", cPath)
@@ -223,27 +222,27 @@ retry:
// Protect against concurrent readers.
fs.dirIVLock.Lock()
defer fs.dirIVLock.Unlock()
- err = syscallcompat.Renameat(int(dirfd.Fd()), nametransform.DirIVFilename,
- int(parentDirFd.Fd()), tmpName)
+ err = syscallcompat.Renameat(dirfd, nametransform.DirIVFilename,
+ parentDirFd, tmpName)
if err != nil {
tlog.Warn.Printf("Rmdir: Renaming %s to %s failed: %v",
nametransform.DirIVFilename, tmpName, err)
return fuse.ToStatus(err)
}
// Actual Rmdir
- err = syscallcompat.Unlinkat(int(parentDirFd.Fd()), cName, unix.AT_REMOVEDIR)
+ err = syscallcompat.Unlinkat(parentDirFd, cName, unix.AT_REMOVEDIR)
if err != nil {
// This can happen if another file in the directory was created in the
// meantime, undo the rename
- err2 := syscallcompat.Renameat(int(parentDirFd.Fd()), tmpName,
- int(dirfd.Fd()), nametransform.DirIVFilename)
+ err2 := syscallcompat.Renameat(parentDirFd, tmpName,
+ dirfd, nametransform.DirIVFilename)
if err != nil {
tlog.Warn.Printf("Rmdir: Rename rollback failed: %v", err2)
}
return fuse.ToStatus(err)
}
// Delete "gocryptfs.diriv.rmdir.XYZ"
- err = syscallcompat.Unlinkat(int(parentDirFd.Fd()), tmpName, 0)
+ err = syscallcompat.Unlinkat(parentDirFd, tmpName, 0)
if err != nil {
tlog.Warn.Printf("Rmdir: Could not clean up %s: %v", tmpName, err)
}
diff --git a/internal/fusefrontend/names.go b/internal/fusefrontend/names.go
index d7fbdce..86c87f0 100644
--- a/internal/fusefrontend/names.go
+++ b/internal/fusefrontend/names.go
@@ -3,7 +3,6 @@ package fusefrontend
// This file forwards file encryption operations to cryptfs
import (
- "os"
"path/filepath"
"github.com/rfjakob/gocryptfs/internal/configfile"
@@ -45,17 +44,17 @@ func (fs *FS) getBackingPath(relPath string) (string, error) {
// "relPath" and returns the dirfd and the encrypted basename.
// The caller should then use Openat(dirfd, cName, ...) and friends.
// openBackingDir is secure against symlink races.
-func (fs *FS) openBackingDir(relPath string) (*os.File, string, error) {
+func (fs *FS) openBackingDir(relPath string) (int, string, error) {
cRelPath, err := fs.encryptPath(relPath)
if err != nil {
- return nil, "", err
+ return -1, "", err
}
// Open parent dir
dirfd, err := syscallcompat.OpenDirNofollow(fs.args.Cipherdir, filepath.Dir(cRelPath))
if err != nil {
- return nil, "", err
+ return -1, "", err
}
- return os.NewFile(uintptr(dirfd), cRelPath), filepath.Base(cRelPath), nil
+ return dirfd, filepath.Base(cRelPath), nil
}
// encryptPath - encrypt relative plaintext path
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 09:26:30 +0000