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| author | Kui-Feng Lee <thinker.li@gmail.com> | 2024-01-20 01:50:03 +0300 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2024-01-24 04:12:52 +0300 |
| commit | 9e926acda0c2e21bca431a1818665ddcd6939755 (patch) | |
| tree | 4d4f1f22b84386dcd06c0402d196ffb748be121b /tools/lib/bpf/bpf.h | |
| parent | f6be98d19985411ca1f3d53413d94d5b7f41c200 (diff) | |
| download | linux-9e926acda0c2e21bca431a1818665ddcd6939755.tar.xz | |
libbpf: Find correct module BTFs for struct_ops maps and progs.
Locate the module BTFs for struct_ops maps and progs and pass them to the
kernel. This ensures that the kernel correctly resolves type IDs from the
appropriate module BTFs.
For the map of a struct_ops object, the FD of the module BTF is set to
bpf_map to keep a reference to the module BTF. The FD is passed to the
kernel as value_type_btf_obj_fd when the struct_ops object is loaded.
For a bpf_struct_ops prog, attach_btf_obj_fd of bpf_prog is the FD of a
module BTF in the kernel.
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240119225005.668602-13-thinker.li@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'tools/lib/bpf/bpf.h')
| -rw-r--r-- | tools/lib/bpf/bpf.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index d0f53772bdc0..53b0bee053ad 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -51,8 +51,10 @@ struct bpf_map_create_opts { __u32 numa_node; __u32 map_ifindex; + __s32 value_type_btf_obj_fd; + size_t:0; }; -#define bpf_map_create_opts__last_field map_ifindex +#define bpf_map_create_opts__last_field value_type_btf_obj_fd LIBBPF_API int bpf_map_create(enum bpf_map_type map_type, const char *map_name, |