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libbpf: add BPF token support to bpf_btf_load() API

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Allow user to specify token_fd for bpf_btf_load() API that wraps
kernel's BPF_BTF_LOAD command. This allows loading BTF from unprivileged
process as long as it has BPF token allowing BPF_BTF_LOAD command, which
can be created and delegated by privileged process.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20231130185229.2688956-15-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko authored and Andrii Nakryiko committed 2024-01-04 19:15:17 -05:00
1 parent a23b8ffcf6
commit 207b6ebb60
2 files changed
+5 -2
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src/bpf.h
+2 -1
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@@ -133,9 +133,10 @@ struct bpf_btf_load_opts {
* If kernel doesn't support this feature, log_size is left unchanged.
*/
__u32 log_true_size;
__u32 token_fd;
size_t :0;
};
#define bpf_btf_load_opts__last_field log_true_size
#define bpf_btf_load_opts__last_field token_fd
LIBBPF_API int bpf_btf_load(const void *btf_data, size_t btf_size,
struct bpf_btf_load_opts *opts);