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authorJosef Bacik <jbacik@fb.com>2017-12-11 19:36:46 +0300
committerAlexei Starovoitov <ast@kernel.org>2017-12-12 19:56:26 +0300
commit92ace9991da08827e809c2d120108a96a281e7fc (patch)
treef228d246aabb6d72e09d97684ff9a6ac6768c50a /include/linux/module.h
parenta23967c181cae80becb451b38ff2a1e01c05c37b (diff)
downloadlinux-92ace9991da08827e809c2d120108a96a281e7fc.tar.xz
add infrastructure for tagging functions as error injectable
Using BPF we can override kprob'ed functions and return arbitrary values. Obviously this can be a bit unsafe, so make this feature opt-in for functions. Simply tag a function with KPROBE_ERROR_INJECT_SYMBOL in order to give BPF access to that function for error injection purposes. Signed-off-by: Josef Bacik <jbacik@fb.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux/module.h')
-rw-r--r--include/linux/module.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/module.h b/include/linux/module.h
index c69b49abe877..548fa09fa806 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -475,6 +475,11 @@ struct module {
ctor_fn_t *ctors;
unsigned int num_ctors;
#endif
+
+#ifdef CONFIG_BPF_KPROBE_OVERRIDE
+ unsigned int num_kprobe_ei_funcs;
+ unsigned long *kprobe_ei_funcs;
+#endif
} ____cacheline_aligned __randomize_layout;
#ifndef MODULE_ARCH_INIT
#define MODULE_ARCH_INIT {}