[PATCH v2 05/12] net: port part of if_vlan header from kernel v5.17

[Oleksij Rempel]

This header is needed for SJA11xx switch driver

Signed-off-by: Oleksij Rempel <o.rempel at pengutronix.de>
---
 include/linux/if_vlan.h | 56 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 include/linux/if_vlan.h

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
new file mode 100644
index 0000000000..9e54685064
--- /dev/null
+++ b/include/linux/if_vlan.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * VLAN		An implementation of 802.1Q VLAN tagging.
+ *
+ * Authors:	Ben Greear <greearb at candelatech.com>
+ */
+#ifndef _LINUX_IF_VLAN_H_
+#define _LINUX_IF_VLAN_H_
+
+#define VLAN_HLEN	4		/* The additional bytes required by VLAN
+					 * (in addition to the Ethernet header)
+					 */
+#define VLAN_ETH_HLEN	18		/* Total octets in header.	 */
+#define VLAN_ETH_ZLEN	64		/* Min. octets in frame sans FCS */
+
+/*
+ * According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan
+ */
+#define VLAN_ETH_DATA_LEN	1500	/* Max. octets in payload	 */
+#define VLAN_ETH_FRAME_LEN	1518	/* Max. octets in frame sans FCS */
+
+#define VLAN_MAX_DEPTH	8		/* Max. number of nested VLAN tags parsed */
+
+/*
+ * 	struct vlan_hdr - vlan header
+ * 	@h_vlan_TCI: priority and VLAN ID
+ *	@h_vlan_encapsulated_proto: packet type ID or len
+ */
+struct vlan_hdr {
+	__be16	h_vlan_TCI;
+	__be16	h_vlan_encapsulated_proto;
+};
+
+/**
+ *	struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr)
+ *	@h_dest: destination ethernet address
+ *	@h_source: source ethernet address
+ *	@h_vlan_proto: ethernet protocol
+ *	@h_vlan_TCI: priority and VLAN ID
+ *	@h_vlan_encapsulated_proto: packet type ID or len
+ */
+struct vlan_ethhdr {
+	unsigned char	h_dest[ETH_ALEN];
+	unsigned char	h_source[ETH_ALEN];
+	__be16		h_vlan_proto;
+	__be16		h_vlan_TCI;
+	__be16		h_vlan_encapsulated_proto;
+};
+
+#define VLAN_PRIO_MASK		0xe000 /* Priority Code Point */
+#define VLAN_PRIO_SHIFT		13
+#define VLAN_CFI_MASK		0x1000 /* Canonical Format Indicator / Drop Eligible Indicator */
+#define VLAN_VID_MASK		0x0fff /* VLAN Identifier */
+#define VLAN_N_VID		4096
+
+#endif /* !(_LINUX_IF_VLAN_H_) */
-- 
2.30.2