xdp: T2666: remove entire XDP code for 1.3 LTS image

This is an extension to commit 801c5235 ("xdp: T2666: disable this highly
experimental feature in 1.3 LTS") by dropping all XDP references in the
equuleus codebase.

1 files changed, 0 insertions, 144 deletions

diff --git a/src/xdp/common/rewrite_helpers.h b/src/xdp/common/rewrite_helpers.h
deleted file mode 100644
index a5d3e671d..000000000
--- a/src/xdp/common/rewrite_helpers.h
+++ /dev/null
@@ -1,144 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-clause) */
-/*
- * This file contains functions that are used in the packetXX XDP programs to
- * manipulate on packets data. The functions are marked as __always_inline, and
- * fully defined in this header file to be included in the BPF program.
- */
-
-#ifndef __REWRITE_HELPERS_H
-#define __REWRITE_HELPERS_H
-
-#include <linux/bpf.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/if_ether.h>
-
-#include <bpf/bpf_helpers.h>
-#include <bpf/bpf_endian.h>
-
-/* Pops the outermost VLAN tag off the packet. Returns the popped VLAN ID on
- * success or negative errno on failure.
- */
-static __always_inline int vlan_tag_pop(struct xdp_md *ctx, struct ethhdr *eth)
-{
-	void *data_end = (void *)(long)ctx->data_end;
-	struct ethhdr eth_cpy;
-	struct vlan_hdr *vlh;
-	__be16 h_proto;
-	int vlid;
-
-	if (!proto_is_vlan(eth->h_proto))
-		return -1;
-
-	/* Careful with the parenthesis here */
-	vlh = (void *)(eth + 1);
-
-	/* Still need to do bounds checking */
-	if (vlh + 1 > data_end)
-		return -1;
-
-	/* Save vlan ID for returning, h_proto for updating Ethernet header */
-	vlid = bpf_ntohs(vlh->h_vlan_TCI);
-	h_proto = vlh->h_vlan_encapsulated_proto;
-
-	/* Make a copy of the outer Ethernet header before we cut it off */
-	__builtin_memcpy(&eth_cpy, eth, sizeof(eth_cpy));
-
-	/* Actually adjust the head pointer */
-	if (bpf_xdp_adjust_head(ctx, (int)sizeof(*vlh)))
-		return -1;
-
-	/* Need to re-evaluate data *and* data_end and do new bounds checking
-	 * after adjusting head
-	 */
-	eth = (void *)(long)ctx->data;
-	data_end = (void *)(long)ctx->data_end;
-	if (eth + 1 > data_end)
-		return -1;
-
-	/* Copy back the old Ethernet header and update the proto type */
-	__builtin_memcpy(eth, &eth_cpy, sizeof(*eth));
-	eth->h_proto = h_proto;
-
-	return vlid;
-}
-
-/* Pushes a new VLAN tag after the Ethernet header. Returns 0 on success,
- * -1 on failure.
- */
-static __always_inline int vlan_tag_push(struct xdp_md *ctx,
-		struct ethhdr *eth, int vlid)
-{
-	void *data_end = (void *)(long)ctx->data_end;
-	struct ethhdr eth_cpy;
-	struct vlan_hdr *vlh;
-
-	/* First copy the original Ethernet header */
-	__builtin_memcpy(&eth_cpy, eth, sizeof(eth_cpy));
-
-	/* Then add space in front of the packet */
-	if (bpf_xdp_adjust_head(ctx, 0 - (int)sizeof(*vlh)))
-		return -1;
-
-	/* Need to re-evaluate data_end and data after head adjustment, and
-	 * bounds check, even though we know there is enough space (as we
-	 * increased it).
-	 */
-	data_end = (void *)(long)ctx->data_end;
-	eth = (void *)(long)ctx->data;
-
-	if (eth + 1 > data_end)
-		return -1;
-
-	/* Copy back Ethernet header in the right place, populate VLAN tag with
-	 * ID and proto, and set outer Ethernet header to VLAN type.
-	 */
-	__builtin_memcpy(eth, &eth_cpy, sizeof(*eth));
-
-	vlh = (void *)(eth + 1);
-
-	if (vlh + 1 > data_end)
-		return -1;
-
-	vlh->h_vlan_TCI = bpf_htons(vlid);
-	vlh->h_vlan_encapsulated_proto = eth->h_proto;
-
-	eth->h_proto = bpf_htons(ETH_P_8021Q);
-	return 0;
-}
-
-/*
- * Swaps destination and source MAC addresses inside an Ethernet header
- */
-static __always_inline void swap_src_dst_mac(struct ethhdr *eth)
-{
-	__u8 h_tmp[ETH_ALEN];
-
-	__builtin_memcpy(h_tmp, eth->h_source, ETH_ALEN);
-	__builtin_memcpy(eth->h_source, eth->h_dest, ETH_ALEN);
-	__builtin_memcpy(eth->h_dest, h_tmp, ETH_ALEN);
-}
-
-/*
- * Swaps destination and source IPv6 addresses inside an IPv6 header
- */
-static __always_inline void swap_src_dst_ipv6(struct ipv6hdr *ipv6)
-{
-	struct in6_addr tmp = ipv6->saddr;
-
-	ipv6->saddr = ipv6->daddr;
-	ipv6->daddr = tmp;
-}
-
-/*
- * Swaps destination and source IPv4 addresses inside an IPv4 header
- */
-static __always_inline void swap_src_dst_ipv4(struct iphdr *iphdr)
-{
-	__be32 tmp = iphdr->saddr;
-
-	iphdr->saddr = iphdr->daddr;
-	iphdr->daddr = tmp;
-}
-
-#endif /* __REWRITE_HELPERS_H */