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selftests/bpf: Check VLAN tag and proto in xdp_metadata

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Verify, whether VLAN tag and proto are set correctly.

To simulate "stripped" VLAN tag on veth, send test packet from VLAN
interface.

Also, add TO_STR() macro for convenience.

Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Link: https://lore.kernel.org/r/20231205210847.28460-19-larysa.zaremba@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Larysa Zaremba
2023-12-05 22:08:47 +01:00
committed by Alexei Starovoitov
parent a3850af4ea
commit 4c6612f610
3 changed files with 26 additions and 2 deletions
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3
tools/testing/selftests/bpf/testing_helpers.h
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@@ -9,6 +9,9 @@
#include <bpf/libbpf.h>
#include <time.h>
#define __TO_STR(x) #x
#define TO_STR(x) __TO_STR(x)
int parse_num_list(const char *s, bool **set, int *set_len);
__u32 link_info_prog_id(const struct bpf_link *link, struct bpf_link_info *info);
int bpf_prog_test_load(const char *file, enum bpf_prog_type type,