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samples/bpf: replace legacy map with the BTF-defined map

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With libbpf 1.0 release, support for legacy BPF map declaration syntax
had been dropped. If you run a program using legacy BPF in the latest
libbpf, the following error will be output.

    libbpf: map 'lwt_len_hist_map' (legacy): legacy map definitions are deprecated, use BTF-defined maps instead
    libbpf: Use of BPF_ANNOTATE_KV_PAIR is deprecated, use BTF-defined maps in .maps section instead

This commit replaces legacy map with the BTF-defined map.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Link: https://lore.kernel.org/r/20230115071613.125791-7-danieltimlee@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Daniel T. Lee 2023-01-15 16:16:09 +09:00 committed by Alexei Starovoitov
parent 58e975d014
commit a1f93c8fb0
2 changed files with 14 additions and 35 deletions
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24
samples/bpf/lwt_len_hist_kern.c
View File

@ -16,23 +16,13 @@
#include <uapi/linux/in.h>
#include <bpf/bpf_helpers.h>
struct bpf_elf_map {
__u32 type;
__u32 size_key;
__u32 size_value;
__u32 max_elem;
__u32 flags;
__u32 id;
__u32 pinning;
};
struct bpf_elf_map SEC("maps") lwt_len_hist_map = {
.type = BPF_MAP_TYPE_PERCPU_HASH,
.size_key = sizeof(__u64),
.size_value = sizeof(__u64),
.pinning = 2,
.max_elem = 1024,
};
struct {
__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
__type(key, u64);
__type(value, u64);
__uint(pinning, LIBBPF_PIN_BY_NAME);
__uint(max_entries, 1024);
} lwt_len_hist_map SEC(".maps");
static unsigned int log2(unsigned int v)
{

25
samples/bpf/test_cgrp2_tc_kern.c
View File

@ -19,24 +19,13 @@ struct eth_hdr {
unsigned short h_proto;
};
#define PIN_GLOBAL_NS 2
struct bpf_elf_map {
__u32 type;
__u32 size_key;
__u32 size_value;
__u32 max_elem;
__u32 flags;
__u32 id;
__u32 pinning;
};
struct bpf_elf_map SEC("maps") test_cgrp2_array_pin = {
.type = BPF_MAP_TYPE_CGROUP_ARRAY,
.size_key = sizeof(uint32_t),
.size_value = sizeof(uint32_t),
.pinning = PIN_GLOBAL_NS,
.max_elem = 1,
};
struct {
__uint(type, BPF_MAP_TYPE_CGROUP_ARRAY);
__type(key, u32);
__type(value, u32);
__uint(pinning, LIBBPF_PIN_BY_NAME);
__uint(max_entries, 1);
} test_cgrp2_array_pin SEC(".maps");
SEC("filter")
int handle_egress(struct __sk_buff *skb)