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| author |   Masami Hiramatsu <mhiramat@kernel.org> | 2018-01-13 02:55:03 +0900 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-01-12 17:33:38 -0800 |
| commit | 540adea3809f61115d2a1ea4ed6e627613452ba1 (patch) | |
| tree | 03ba07d13807d06d52053b2d02565075f210c2e2 /include/asm-generic/error-injection.h | |
| parent | tracing/kprobe: bpf: Compare instruction pointer with original one (diff) | |
| download | linux-dev-540adea3809f61115d2a1ea4ed6e627613452ba1.tar.xz linux-dev-540adea3809f61115d2a1ea4ed6e627613452ba1.zip | |
error-injection: Separate error-injection from kprobe
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>
Diffstat (limited to 'include/asm-generic/error-injection.h')
| -rw-r--r-- | include/asm-generic/error-injection.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/asm-generic/error-injection.h b/include/asm-generic/error-injection.h new file mode 100644 index 000000000000..08352c9d9f97 --- /dev/null +++ b/include/asm-generic/error-injection.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_GENERIC_ERROR_INJECTION_H +#define _ASM_GENERIC_ERROR_INJECTION_H + +#if defined(__KERNEL__) && !defined(__ASSEMBLY__) +#ifdef CONFIG_FUNCTION_ERROR_INJECTION +/* + * Whitelist ganerating macro. Specify functions which can be + * error-injectable using this macro. + */ +#define ALLOW_ERROR_INJECTION(fname) \ +static unsigned long __used \ + __attribute__((__section__("_error_injection_whitelist"))) \ + _eil_addr_##fname = (unsigned long)fname; +#else +#define ALLOW_ERROR_INJECTION(fname) +#endif +#endif + +#endif /* _ASM_GENERIC_ERROR_INJECTION_H */ |