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| author | Martin KaFai Lau <kafai@fb.com> | 2018-07-24 17:40:22 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-07-25 06:57:55 +0200 |
| commit | 38d5d3b3d5dbc0e0bb51fa6f7559d0d5a27916f6 (patch) | |
| tree | c19295299de7d53fcacffb42ea67b3c00206aeab /tools/lib/bpf/btf.c | |
| parent | bpf: Replace [u]int32_t and [u]int64_t in libbpf (diff) | |
| download | linux-38d5d3b3d5dbc0e0bb51fa6f7559d0d5a27916f6.tar.xz linux-38d5d3b3d5dbc0e0bb51fa6f7559d0d5a27916f6.zip | |
bpf: Introduce BPF_ANNOTATE_KV_PAIR
This patch introduces BPF_ANNOTATE_KV_PAIR to signal the
bpf loader about the btf key_type and value_type of a bpf map.
Please refer to the changes in test_btf_haskv.c for its usage.
Both iproute2 and libbpf loader will then have the same
convention to find out the map's btf_key_type_id and
btf_value_type_id from a map's name.
Fixes: 8a138aed4a80 ("bpf: btf: Add BTF support to libbpf")
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/lib/bpf/btf.c')
| -rw-r--r-- | tools/lib/bpf/btf.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index b80de80b4584..2d270c560df3 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -189,8 +189,7 @@ static int btf_parse_type_sec(struct btf *btf, btf_print_fn_t err_log) return 0; } -static const struct btf_type *btf_type_by_id(const struct btf *btf, - __u32 type_id) +const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 type_id) { if (type_id > btf->nr_types) return NULL; @@ -233,7 +232,7 @@ __s64 btf__resolve_size(const struct btf *btf, __u32 type_id) __s64 size = -1; int i; - t = btf_type_by_id(btf, type_id); + t = btf__type_by_id(btf, type_id); for (i = 0; i < MAX_RESOLVE_DEPTH && !btf_type_is_void_or_null(t); i++) { size = btf_type_size(t); @@ -258,7 +257,7 @@ __s64 btf__resolve_size(const struct btf *btf, __u32 type_id) return -EINVAL; } - t = btf_type_by_id(btf, type_id); + t = btf__type_by_id(btf, type_id); } if (size < 0) |