[RFC PATCH 2/6] rust: helpers: add net_device and sk_buff helper wrappers

[Wenzhao Liao]

Add C helper entry points for the small networking helpers that are not
exposed through bindgen-friendly interfaces.

This covers netdev_priv() and dev_lstats_add(), which are used by the
reference driver and remain hidden behind Rust-side safe wrappers.

Signed-off-by: Wenzhao Liao <wenzhaoliao@xxxxxxxxxx>
---
 rust/helpers/helpers.c |  1 +
 rust/helpers/net.c     | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 rust/helpers/net.c

diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index a3c42e51f00a..90fe1c7cbadc 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -38,6 +38,7 @@
 #include "maple_tree.c"
 #include "mm.c"
 #include "mutex.c"
+#include "net.c"
 #include "of.c"
 #include "page.c"
 #include "pci.c"
diff --git a/rust/helpers/net.c b/rust/helpers/net.c
new file mode 100644
index 000000000000..da04c718acd4
--- /dev/null
+++ b/rust/helpers/net.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+__rust_helper void rust_helper_dev_kfree_skb(struct sk_buff *skb)
+{
+	dev_kfree_skb(skb);
+}
+
+__rust_helper void rust_helper_dev_lstats_add(struct net_device *dev, unsigned int len)
+{
+	dev_lstats_add(dev, len);
+}
+
+__rust_helper void *rust_helper_netdev_priv(const struct net_device *dev)
+{
+	return netdev_priv(dev);
+}
-- 
2.34.1