Messages in this thread Patch in this message | | | From | Artem Savkov <> | Subject | [PATCH bpf-next v3 2/3] bpf: export crash_kexec() as destructive kfunc | Date | Mon, 8 Aug 2022 11:46:22 +0200 |
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Allow properly marked bpf programs to call crash_kexec().
Signed-off-by: Artem Savkov <asavkov@redhat.com> --- kernel/bpf/helpers.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 1f961f9982d2..103dbddff41f 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1711,3 +1711,24 @@ bpf_base_func_proto(enum bpf_func_id func_id) return NULL; } } + +BTF_SET8_START(tracing_btf_ids) +#ifdef CONFIG_KEXEC_CORE +BTF_ID_FLAGS(func, crash_kexec, KF_DESTRUCTIVE) +#endif +BTF_SET8_END(tracing_btf_ids) + +static const struct btf_kfunc_id_set tracing_kfunc_set = { + .owner = THIS_MODULE, + .set = &tracing_btf_ids, +}; + +static int __init kfunc_init(void) +{ + if (register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &tracing_kfunc_set)) + pr_warn("failed to register kfunc id set for BPF_PROG_TYPE_TRACING\n"); + + return 0; +} + +late_initcall(kfunc_init); -- 2.37.1
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