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libbpf: Add support for associating BPF program with struct_ops

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Add low-level wrapper and libbpf API for BPF_PROG_ASSOC_STRUCT_OPS
command in the bpf() syscall.

Signed-off-by: Amery Hung <ameryhung@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20251203233748.668365-4-ameryhung@gmail.com
This commit is contained in:
Amery Hung
2025-12-03 15:37:45 -08:00
committed by Andrii Nakryiko
parent 1a41b12b4f
commit 5635185147
5 changed files with 89 additions and 0 deletions
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21
src/bpf.h
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@@ -733,6 +733,27 @@ struct bpf_prog_stream_read_opts {
LIBBPF_API int bpf_prog_stream_read(int prog_fd, __u32 stream_id, void *buf, __u32 buf_len,
struct bpf_prog_stream_read_opts *opts);
struct bpf_prog_assoc_struct_ops_opts {
size_t sz;
__u32 flags;
size_t :0;
};
#define bpf_prog_assoc_struct_ops_opts__last_field flags
/**
* @brief **bpf_prog_assoc_struct_ops** associates a BPF program with a
* struct_ops map.
*
* @param prog_fd FD for the BPF program
* @param map_fd FD for the struct_ops map to be associated with the BPF program
* @param opts optional options, can be NULL
*
* @return 0 on success; negative error code, otherwise (errno is also set to
* the error code)
*/
LIBBPF_API int bpf_prog_assoc_struct_ops(int prog_fd, int map_fd,
struct bpf_prog_assoc_struct_ops_opts *opts);
#ifdef __cplusplus
} /* extern "C" */
#endif