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Allow construction of mount namespace from existing filesystem.

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PiperOrigin-RevId: 503260418
This commit is contained in:
Rahat Mahmood
2023-01-19 14:09:28 -08:00
committed by gVisor bot
parent 75ec332fee
commit 7d68beb261
1 changed files with 8 additions and 1 deletions
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pkg/sentry/vfs/mount.go
+8 -1
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@@ -207,13 +207,20 @@ func (vfs *VirtualFilesystem) NewMountNamespace(ctx context.Context, creds *auth
if err != nil {
return nil, err
}
return vfs.NewMountNamespaceFrom(ctx, creds, fs, root, opts), nil
}
// NewMountNamespaceFrom constructs a new mount namespace from an existing
// filesystem and its root dentry. This is similar to NewMountNamespace, but
// uses an existing filesystem instead of constructing a new one.
func (vfs *VirtualFilesystem) NewMountNamespaceFrom(ctx context.Context, creds *auth.Credentials, fs *Filesystem, root *Dentry, opts *MountOptions) *MountNamespace {
mntns := &MountNamespace{
Owner: creds.UserNamespace,
mountpoints: make(map[*Dentry]uint32),
}
mntns.InitRefs()
mntns.root = newMount(vfs, fs, root, mntns, opts)
return mntns, nil
return mntns
}
// NewFilesystem creates a new filesystem object not yet associated with any