From 8c18ea2d2c2913c80d8700c8bc8fe8568b8650a1 Mon Sep 17 00:00:00 2001 From: Yonghong Song Date: Thu, 21 Oct 2021 12:56:43 -0700 Subject: [PATCH] selftests/bpf: Add BTF_KIND_DECL_TAG typedef example in tag.c Change value type in progs/tag.c to a typedef with a btf_decl_tag. With `bpftool btf dump file tag.o`, we have ... [14] TYPEDEF 'value_t' type_id=17 [15] DECL_TAG 'tag1' type_id=14 component_idx=-1 [16] DECL_TAG 'tag2' type_id=14 component_idx=-1 [17] STRUCT '(anon)' size=8 vlen=2 'a' type_id=2 bits_offset=0 'b' type_id=2 bits_offset=32 ... The btf_tag selftest also succeeded: $ ./test_progs -t tag #21 btf_tag:OK Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211021195643.4020315-1-yhs@fb.com --- tools/testing/selftests/bpf/progs/tag.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/tag.c b/tools/testing/selftests/bpf/progs/tag.c index 672d19e7b120..1792f4eda095 100644 --- a/tools/testing/selftests/bpf/progs/tag.c +++ b/tools/testing/selftests/bpf/progs/tag.c @@ -24,18 +24,23 @@ struct key_t { int c; } __tag1 __tag2; +typedef struct { + int a; + int b; +} value_t __tag1 __tag2; + struct { __uint(type, BPF_MAP_TYPE_HASH); __uint(max_entries, 3); __type(key, struct key_t); - __type(value, __u64); + __type(value, value_t); } hashmap1 SEC(".maps"); static __noinline int foo(int x __tag1 __tag2) __tag1 __tag2 { struct key_t key; - __u64 val = 1; + value_t val = {}; key.a = key.b = key.c = x; bpf_map_update_elem(&hashmap1, &key, &val, 0); -- 2.11.0