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error-injection: Separate error-injection from kprobe

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Since error-injection framework is not limited to be used
by kprobes, nor bpf. Other kernel subsystems can use it
freely for checking safeness of error-injection, e.g.
livepatch, ftrace etc.
So this separate error-injection framework from kprobes.

Some differences has been made:

- "kprobe" word is removed from any APIs/structures.
- BPF_ALLOW_ERROR_INJECTION() is renamed to
  ALLOW_ERROR_INJECTION() since it is not limited for BPF too.
- CONFIG_FUNCTION_ERROR_INJECTION is the config item of this
  feature. It is automatically enabled if the arch supports
  error injection feature for kprobe or ftrace etc.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Masami Hiramatsu 2018-01-13 02:55:03 +09:00 • committed by Alexei Starovoitov
parent 66665ad2f1
commit 540adea380
22 changed files with 317 additions and 213 deletions
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6
include/linux/module.h
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@ -476,9 +476,9 @@ struct module {
unsigned int num_ctors;
#endif
#ifdef CONFIG_BPF_KPROBE_OVERRIDE
unsigned int num_kprobe_ei_funcs;
unsigned long *kprobe_ei_funcs;
#ifdef CONFIG_FUNCTION_ERROR_INJECTION
unsigned int num_ei_funcs;
unsigned long *ei_funcs;
#endif
} ____cacheline_aligned __randomize_layout;
#ifndef MODULE_ARCH_INIT