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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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4
lib/Kconfig.debug
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@@ -1500,6 +1500,10 @@ config FAULT_INJECTION
Provide fault-injection framework.
For more details, see Documentation/fault-injection/.
config FUNCTION_ERROR_INJECTION
def_bool y
depends on HAVE_FUNCTION_ERROR_INJECTION && KPROBES
config FAILSLAB
bool "Fault-injection capability for kmalloc"
depends on FAULT_INJECTION