Simplify vfs.NewDisconnectedMount signature and callpoints.

vfs.NewDisconnectedMount has no error paths. Its much prettier without the
error return value.

Also simplify MountDisconnected which would immediately drop the refs taken by
NewDisconnectedMount. Instead make it directly call newMount.

PiperOrigin-RevId: 405767966

1 files changed, 3 insertions, 5 deletions

diff --git a/pkg/sentry/vfs/mount.go b/pkg/sentry/vfs/mount.go
index 05a416775..9ab9a8fca 100644
--- a/pkg/sentry/vfs/mount.go
+++ b/pkg/sentry/vfs/mount.go
@@ -178,12 +178,12 @@ func (vfs *VirtualFilesystem) NewMountNamespace(ctx context.Context, creds *auth
 // (which may be nil). The new Mount is not associated with any MountNamespace
 // and is not connected to any other Mounts. References are taken on fs and
 // root.
-func (vfs *VirtualFilesystem) NewDisconnectedMount(fs *Filesystem, root *Dentry, opts *MountOptions) (*Mount, error) {
+func (vfs *VirtualFilesystem) NewDisconnectedMount(fs *Filesystem, root *Dentry, opts *MountOptions) *Mount {
 	fs.IncRef()
 	if root != nil {
 		root.IncRef()
 	}
-	return newMount(vfs, fs, root, nil /* mntns */, opts), nil
+	return newMount(vfs, fs, root, nil /* mntns */, opts)
 }
 
 // MountDisconnected creates a Filesystem configured by the given arguments,
@@ -201,9 +201,7 @@ func (vfs *VirtualFilesystem) MountDisconnected(ctx context.Context, creds *auth
 	if err != nil {
 		return nil, err
 	}
-	defer root.DecRef(ctx)
-	defer fs.DecRef(ctx)
-	return vfs.NewDisconnectedMount(fs, root, opts)
+	return newMount(vfs, fs, root, nil /* mntns */, opts), nil
 }
 
 // ConnectMountAt connects mnt at the path represented by target.