android/android_kernel_samsung_sm8650
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bpf: export crash_kexec() as destructive kfunc

Browse Source 
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>
This commit is contained in:
Artem Savkov 2022-08-10 08:59:04 +02:00 committed by Alexei Starovoitov
parent 4dd48c6f1f
commit 1337905964
1 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
kernel/bpf/helpers.c
View 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);