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authorChristian Poessinger <christian@poessinger.com>2020-12-18 17:13:13 +0100
committerChristian Poessinger <christian@poessinger.com>2020-12-19 21:56:19 +0100
commitb5c80d310527223b93e4133ac2f4c8c063c70a98 (patch)
tree48ae9e2752b4b94c07f767a019c99a8c2460c014 /src/xdp/include/bpf_legacy.h
parent22308b05dfbcd8da0230bbd8ba3bbc2a55da7786 (diff)
downloadvyos-1x-b5c80d310527223b93e4133ac2f4c8c063c70a98.tar.gz
vyos-1x-b5c80d310527223b93e4133ac2f4c8c063c70a98.zip
xdp: T2666: switch to example code provided by xdp-tutorial
Diffstat (limited to 'src/xdp/include/bpf_legacy.h')
-rw-r--r--src/xdp/include/bpf_legacy.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/src/xdp/include/bpf_legacy.h b/src/xdp/include/bpf_legacy.h
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+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
+#ifndef __BPF_LEGACY__
+#define __BPF_LEGACY__
+
+/*
+ * legacy bpf_map_def with extra fields supported only by bpf_load(), do not
+ * use outside of samples/bpf
+ */
+struct bpf_map_def_legacy {
+ unsigned int type;
+ unsigned int key_size;
+ unsigned int value_size;
+ unsigned int max_entries;
+ unsigned int map_flags;
+ unsigned int inner_map_idx;
+ unsigned int numa_node;
+};
+
+#define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val) \
+ struct ____btf_map_##name { \
+ type_key key; \
+ type_val value; \
+ }; \
+ struct ____btf_map_##name \
+ __attribute__ ((section(".maps." #name), used)) \
+ ____btf_map_##name = { }
+
+/* llvm builtin functions that eBPF C program may use to
+ * emit BPF_LD_ABS and BPF_LD_IND instructions
+ */
+unsigned long long load_byte(void *skb,
+ unsigned long long off) asm("llvm.bpf.load.byte");
+unsigned long long load_half(void *skb,
+ unsigned long long off) asm("llvm.bpf.load.half");
+unsigned long long load_word(void *skb,
+ unsigned long long off) asm("llvm.bpf.load.word");
+
+#endif