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libbpf: Unify low-level map creation APIs w/ new bpf_map_create()

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Mark the entire zoo of low-level map creation APIs for deprecation in
libbpf 0.7 ([0]) and introduce a new bpf_map_create() API that is
OPTS-based (and thus future-proof) and matches the BPF_MAP_CREATE
command name.

While at it, ensure that gen_loader sends map_extra field. Also remove
now unneeded btf_key_type_id/btf_value_type_id logic that libbpf is
doing anyways.

  [0] Closes: https://github.com/libbpf/libbpf/issues/282

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124193233.3115996-2-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2021-11-24 11:32:30 -08:00
committed by Andrii Nakryiko
parent 5c31bcf220
commit 6cfb97c561
7 changed files with 124 additions and 151 deletions
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21
src/libbpf_internal.h
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@@ -278,27 +278,6 @@ int parse_cpu_mask_file(const char *fcpu, bool **mask, int *mask_sz);
int libbpf__load_raw_btf(const char *raw_types, size_t types_len,
const char *str_sec, size_t str_len);
struct bpf_create_map_params {
const char *name;
enum bpf_map_type map_type;
__u32 map_flags;
__u32 key_size;
__u32 value_size;
__u32 max_entries;
__u32 numa_node;
__u32 btf_fd;
__u32 btf_key_type_id;
__u32 btf_value_type_id;
__u32 map_ifindex;
union {
__u32 inner_map_fd;
__u32 btf_vmlinux_value_type_id;
};
__u64 map_extra;
};
int libbpf__bpf_create_map_xattr(const struct bpf_create_map_params *create_attr);
struct btf *btf_get_from_fd(int btf_fd, struct btf *base_btf);
void btf_get_kernel_prefix_kind(enum bpf_attach_type attach_type,
const char **prefix, int *kind);