hardcoresushi/libgocryptfs
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v2api: implement Unlink

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This commit is contained in:
Jakob Unterwurzacher 2020-06-21 14:08:53 +02:00
parent cc0b94a3c5
commit 1618fbbac5
3 changed files with 42 additions and 0 deletions
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36
internal/fusefrontend/node.go
View File

@ -31,6 +31,7 @@ func (n *Node) rootNode() *RootNode {
return n.Root().Operations().(*RootNode)
}
// Lookup - FUSE call for discovering a file.
func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*fs.Inode, syscall.Errno) {
rn := n.rootNode()
p := filepath.Join(n.path(), name)
@ -61,6 +62,9 @@ func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*fs
return ch, 0
}
// GetAttr - FUSE call for stat()ing a file.
//
// GetAttr is symlink-safe through use of openBackingDir() and Fstatat().
func (n *Node) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
rn := n.rootNode()
dirfd, cName, err := rn.openBackingDir(n.path())
@ -78,6 +82,9 @@ func (n *Node) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut)
return 0
}
// Create - FUSE call. Creates a new file.
//
// Symlink-safe through the use of Openat().
func (n *Node) Create(ctx context.Context, name string, flags uint32, mode uint32, out *fuse.EntryOut) (inode *fs.Inode, fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
rn := n.rootNode()
path := filepath.Join(n.path(), name)
@ -142,3 +149,32 @@ func (n *Node) Create(ctx context.Context, name string, flags uint32, mode uint3
f := os.NewFile(uintptr(fd), cName)
return ch, NewFile2(f, rn, st), 0, 0
}
// Unlink - FUSE call. Delete a file.
//
// Symlink-safe through use of Unlinkat().
func (n *Node) Unlink(ctx context.Context, name string) syscall.Errno {
rn := n.rootNode()
p := filepath.Join(n.path(), name)
if rn.isFiltered(p) {
return syscall.EPERM
}
dirfd, cName, err := rn.openBackingDir(p)
if err != nil {
return fs.ToErrno(err)
}
defer syscall.Close(dirfd)
// Delete content
err = syscallcompat.Unlinkat(dirfd, cName, 0)
if err != nil {
return fs.ToErrno(err)
}
// Delete ".name" file
if !rn.args.PlaintextNames && nametransform.IsLongContent(cName) {
err = nametransform.DeleteLongNameAt(dirfd, cName)
if err != nil {
tlog.Warn.Printf("Unlink: could not delete .name file: %v", err)
}
}
return fs.ToErrno(err)
}

2
internal/fusefrontend/node_api_check.go
View File

@ -4,9 +4,11 @@ import (
"github.com/hanwen/go-fuse/v2/fs"
)
// Check that we have implemented the interfaces
var _ = (fs.NodeGetattrer)((*Node)(nil))
var _ = (fs.NodeLookuper)((*Node)(nil))
var _ = (fs.NodeReaddirer)((*Node)(nil))
var _ = (fs.NodeCreater)((*Node)(nil))
var _ = (fs.NodeMkdirer)((*Node)(nil))
var _ = (fs.NodeRmdirer)((*Node)(nil))
var _ = (fs.NodeUnlinker)((*Node)(nil))

4
internal/fusefrontend/node_dir_ops.go
View File

@ -139,6 +139,10 @@ func (n *Node) Mkdir(ctx context.Context, name string, mode uint32, out *fuse.En
return ch, 0
}
// Readdir - FUSE call.
//
// This function is symlink-safe through use of openBackingDir() and
// ReadDirIVAt().
func (n *Node) Readdir(ctx context.Context) (fs.DirStream, syscall.Errno) {
rn := n.rootNode()
p := n.path()