Merge branch 'bpf-libbpf-int-btf-map'

Andrii Nakryiko says:

====================
This patch set implements an update to how BTF-defined maps are specified. The
change is in how integer attributes, e.g., type, max_entries, map_flags, are
specified: now they are captured as part of map definition struct's BTF type
information (using array dimension), eliminating the need for compile-time
data initialization and keeping all the metadata in one place.

All existing selftests that were using BTF-defined maps are updated, along
with some other selftests, that were switched to new syntax.

v4->v5:
- revert sample_map_ret0.c, which is loaded with iproute2 (kernel test robot);
v3->v4:
- add acks;
- fix int -> uint type in commit message;
v2->v3:
- rename __int into __uint (Yonghong);
v1->v2:
- split bpf_helpers.h change from libbpf change (Song).
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 31 insertions, 50 deletions

diff --git a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
index d2eddb5553d1..dad8a7e33eaa 100644
--- a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
+++ b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c
@@ -164,66 +164,47 @@ struct lb_stats {
 };
 
 struct {
-	__u32 type;
-	__u32 max_entries;
-	struct vip_definition *key;
-	struct vip_meta *value;
-} vip_map SEC(".maps") = {
-	.type = BPF_MAP_TYPE_HASH,
-	.max_entries = 512,
-};
+	__uint(type, BPF_MAP_TYPE_HASH);
+	__uint(max_entries, 512);
+	__type(key, struct vip_definition);
+	__type(value, struct vip_meta);
+} vip_map SEC(".maps");
 
 struct {
-	__u32 type;
-	__u32 max_entries;
-	__u32 map_flags;
-	struct flow_key *key;
-	struct real_pos_lru *value;
-} lru_cache SEC(".maps") = {
-	.type = BPF_MAP_TYPE_LRU_HASH,
-	.max_entries = 300,
-	.map_flags = 1U << 1,
-};
+	__uint(type, BPF_MAP_TYPE_LRU_HASH);
+	__uint(max_entries, 300);
+	__uint(map_flags, 1U << 1);
+	__type(key, struct flow_key);
+	__type(value, struct real_pos_lru);
+} lru_cache SEC(".maps");
 
 struct {
-	__u32 type;
-	__u32 max_entries;
-	__u32 *key;
-	__u32 *value;
-} ch_rings SEC(".maps") = {
-	.type = BPF_MAP_TYPE_ARRAY,
-	.max_entries = 12 * 655,
-};
+	__uint(type, BPF_MAP_TYPE_ARRAY);
+	__uint(max_entries, 12 * 655);
+	__type(key, __u32);
+	__type(value, __u32);
+} ch_rings SEC(".maps");
 
 struct {
-	__u32 type;
-	__u32 max_entries;
-	__u32 *key;
-	struct real_definition *value;
-} reals SEC(".maps") = {
-	.type = BPF_MAP_TYPE_ARRAY,
-	.max_entries = 40,
-};
+	__uint(type, BPF_MAP_TYPE_ARRAY);
+	__uint(max_entries, 40);
+	__type(key, __u32);
+	__type(value, struct real_definition);
+} reals SEC(".maps");
 
 struct {
-	__u32 type;
-	__u32 max_entries;
-	__u32 *key;
-	struct lb_stats *value;
-} stats SEC(".maps") = {
-	.type = BPF_MAP_TYPE_PERCPU_ARRAY,
-	.max_entries = 515,
-};
+	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+	__uint(max_entries, 515);
+	__type(key, __u32);
+	__type(value, struct lb_stats);
+} stats SEC(".maps");
 
 struct {
-	__u32 type;
-	__u32 max_entries;
-	__u32 *key;
-	struct ctl_value *value;
-} ctl_array SEC(".maps") = {
-	.type = BPF_MAP_TYPE_ARRAY,
-	.max_entries = 16,
-};
+	__uint(type, BPF_MAP_TYPE_ARRAY);
+	__uint(max_entries, 16);
+	__type(key, __u32);
+	__type(value, struct ctl_value);
+} ctl_array SEC(".maps");
 
 struct eth_hdr {
 	unsigned char eth_dest[6];