On Tue, Dec 26, 2017 at 04:48:25PM +0900, Masami Hiramatsu wrote: > Support in-kernel fault-injection framework via debugfs. > This allows you to inject a conditional error to specified > function using debugfs interfaces. > > Signed-off-by: Masami Hiramatsu <mhira...@kernel.org> > --- > Documentation/fault-injection/fault-injection.txt | 5 + > kernel/Makefile | 1 > kernel/fail_function.c | 169 > +++++++++++++++++++++ > lib/Kconfig.debug | 10 + > 4 files changed, 185 insertions(+) > create mode 100644 kernel/fail_function.c > > diff --git a/Documentation/fault-injection/fault-injection.txt > b/Documentation/fault-injection/fault-injection.txt > index 918972babcd8..6243a588dd71 100644 > --- a/Documentation/fault-injection/fault-injection.txt > +++ b/Documentation/fault-injection/fault-injection.txt > @@ -30,6 +30,11 @@ o fail_mmc_request > injects MMC data errors on devices permitted by setting > debugfs entries under /sys/kernel/debug/mmc0/fail_mmc_request > > +o fail_function > + > + injects error return on specific functions by setting debugfs entries > + under /sys/kernel/debug/fail_function. No boot option supported.
I like it. Could you document it a bit better? In particular retval is configurable, but without an example no one will be able to figure out how to use it. I think you can drop RFC tag from the next version of these patches. Thanks!
