3 files changed, 31 insertions, 11 deletions
diff --git a/net/core/netdev-genl-gen.c b/net/core/netdev-genl-gen.c
index 9e10802587fc..3abab70d66dd 100644
--- a/net/core/netdev-genl-gen.c
+++ b/net/core/netdev-genl-gen.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
 /* Do not edit directly, auto-generated from: */
 /*	Documentation/netlink/specs/netdev.yaml */
 /* YNL-GEN kernel source */
diff --git a/net/core/netdev-genl-gen.h b/net/core/netdev-genl-gen.h
index 2c5fc7d1e8a7..74d74fc23167 100644
--- a/net/core/netdev-genl-gen.h
+++ b/net/core/netdev-genl-gen.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
 /* Do not edit directly, auto-generated from: */
 /*	Documentation/netlink/specs/netdev.yaml */
 /* YNL-GEN kernel header */
diff --git a/net/core/xdp.c b/net/core/xdp.c
index 8c92fc553317..528d4b37983d 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -720,7 +720,10 @@ __diag_ignore_all("-Wmissing-prototypes",
  * @ctx: XDP context pointer.
  * @timestamp: Return value pointer.
  *
- * Returns 0 on success or ``-errno`` on error.
+ * Return:
+ * * Returns 0 on success or ``-errno`` on error.
+ * * ``-EOPNOTSUPP`` : means device driver does not implement kfunc
+ * * ``-ENODATA``    : means no RX-timestamp available for this frame
  */
 __bpf_kfunc int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp)
 {
@@ -732,7 +735,10 @@ __bpf_kfunc int bpf_xdp_metadata_rx_timestamp(const struct xdp_md *ctx, u64 *tim
  * @ctx: XDP context pointer.
  * @hash: Return value pointer.
  *
- * Returns 0 on success or ``-errno`` on error.
+ * Return:
+ * * Returns 0 on success or ``-errno`` on error.
+ * * ``-EOPNOTSUPP`` : means device driver doesn't implement kfunc
+ * * ``-ENODATA``    : means no RX-hash available for this frame
  */
 __bpf_kfunc int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, u32 *hash)
 {
@@ -774,20 +780,34 @@ static int __init xdp_metadata_init(void)
 }
 late_initcall(xdp_metadata_init);
 
+void xdp_set_features_flag(struct net_device *dev, xdp_features_t val)
+{
+	val &= NETDEV_XDP_ACT_MASK;
+	if (dev->xdp_features == val)
+		return;
+
+	dev->xdp_features = val;
+
+	if (dev->reg_state == NETREG_REGISTERED)
+		call_netdevice_notifiers(NETDEV_XDP_FEAT_CHANGE, dev);
+}
+EXPORT_SYMBOL_GPL(xdp_set_features_flag);
+
 void xdp_features_set_redirect_target(struct net_device *dev, bool support_sg)
 {
-	dev->xdp_features |= NETDEV_XDP_ACT_NDO_XMIT;
-	if (support_sg)
-		dev->xdp_features |= NETDEV_XDP_ACT_NDO_XMIT_SG;
+	xdp_features_t val = (dev->xdp_features | NETDEV_XDP_ACT_NDO_XMIT);
 
-	call_netdevice_notifiers(NETDEV_XDP_FEAT_CHANGE, dev);
+	if (support_sg)
+		val |= NETDEV_XDP_ACT_NDO_XMIT_SG;
+	xdp_set_features_flag(dev, val);
 }
 EXPORT_SYMBOL_GPL(xdp_features_set_redirect_target);
 
 void xdp_features_clear_redirect_target(struct net_device *dev)
 {
-	dev->xdp_features &= ~(NETDEV_XDP_ACT_NDO_XMIT |
-			       NETDEV_XDP_ACT_NDO_XMIT_SG);
-	call_netdevice_notifiers(NETDEV_XDP_FEAT_CHANGE, dev);
+	xdp_features_t val = dev->xdp_features;
+
+	val &= ~(NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_NDO_XMIT_SG);
+	xdp_set_features_flag(dev, val);
 }
 EXPORT_SYMBOL_GPL(xdp_features_clear_redirect_target);