]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
bpf: export crash_kexec() as destructive kfunc
authorArtem Savkov <asavkov@redhat.com>
Wed, 10 Aug 2022 06:59:04 +0000 (08:59 +0200)
committerAlexei Starovoitov <ast@kernel.org>
Wed, 10 Aug 2022 16:22:18 +0000 (09:22 -0700)
Allow properly marked bpf programs to call crash_kexec().

Signed-off-by: Artem Savkov <asavkov@redhat.com>
Link: https://lore.kernel.org/r/20220810065905.475418-3-asavkov@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
kernel/bpf/helpers.c

index a95eb9fb01ff896ec525076d37a93d7baeff20cc..3c1b9bbcf97114f48ab539d404ae7be9d4b49297 100644 (file)
@@ -1725,3 +1725,21 @@ 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)
+{
+       return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &tracing_kfunc_set);
+}
+
+late_initcall(kfunc_init);