[RFC PATCH v2 3/5] libbpf: check if BTF is sorted to enable binary search

[Donglin Peng <dolinux.peng@gmail.com>]

Now that libbpf supports sorted BTF types, add a check to determine
whether binary search can be used for type lookups.

Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Alan Maguire <alan.maguire@oracle.com>
Cc: Song Liu <song@kernel.org>
Signed-off-by: pengdonglin <pengdonglin@xiaomi.com>
Signed-off-by: Donglin Peng <dolinux.peng@gmail.com>
---
 tools/lib/bpf/btf.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 87e47f0b78ba..92c370fe9b79 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -1091,6 +1091,8 @@ static struct btf *btf_new(const void *data, __u32 size, struct btf *base_btf, b
 	if (err)
 		goto done;
 
+	btf_check_sorted(btf, btf->start_id);
+
 done:
 	if (err) {
 		btf__free(btf);
@@ -1714,6 +1716,7 @@ static void btf_invalidate_raw_data(struct btf *btf)
 		free(btf->raw_data_swapped);
 		btf->raw_data_swapped = NULL;
 	}
+	btf->nr_sorted_types = 0;
 }
 
 /* Ensure BTF is ready to be modified (by splitting into a three memory
@@ -5456,6 +5459,9 @@ static int btf_dedup_remap_types(struct btf_dedup *d)
 		}
 	}
 
+	if (d->sort_by_kind_name)
+		btf_check_sorted(d->btf, d->btf->start_id);
+
 	if (!d->btf_ext)
 		return 0;
 
-- 
2.34.1