linux-kernel - Re: [PATCH] fault-injection: handle EI_ETYPE

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Message-ID: <6bOOjFIyEwIPNLoY3wMdLuKENpcumphiNztVz7xDofD2Pkyv61mvDghklDSA3xNNCm7pC6XvqNeTCJ7vt1MsjrJZN5i0mbPK7YkE8Jgi1uw=@protonmail.com>
Date:   Tue, 13 Oct 2020 09:31:30 +0000
From:   Barnabás Pőcze <pobrn@...tonmail.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Akinobu Mita <akinobu.mita@...il.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] fault-injection: handle EI_ETYPE_TRUE

Hi,

I had some difficulty finding who should receive this patch, and I am not
sure I got it right. Could someone please confirm that any of you
can take this patch, or should I resend it? (In that case, to whom?)


Thank you,
Barnabás Pőcze


> Commit af3b854492f351d1ff3b4744a83bf5ff7eed4920
> ("mm/page_alloc.c: allow error injection")
> introduced EI_ETYPE_TRUE, but did not extend
>
> -   lib/error-inject.c:error_type_string(), and
> -   kernel/fail_function.c:adjust_error_retval()
>     to accommodate for this change.
>
>     Handle EI_ETYPE_TRUE in both functions appropriately by
>
> -   returning "TRUE" in error_type_string(),
> -   adjusting the return value to true (1) in adjust_error_retval().
>
>     Furthermore, simplify the logic of handling EI_ETYPE_NULL
>     in adjust_error_retval().
>
>     Signed-off-by: Barnabás Pőcze pobrn@...tonmail.com
>
>
> kernel/fail_function.c | 6 +++---
> lib/error-inject.c | 2 ++
> 2 files changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/fail_function.c b/kernel/fail_function.c
> index 63b349168da7..4fdea01c0561 100644
> --- a/kernel/fail_function.c
> +++ b/kernel/fail_function.c
> @@ -37,9 +37,7 @@ static unsigned long adjust_error_retval(unsigned long addr, unsigned long retv)
> {
> switch (get_injectable_error_type(addr)) {
> case EI_ETYPE_NULL:
>
> -         if (retv != 0)
>
>
> -         	return 0;
>
>
> -         break;
>
>
>
> -         return 0;
>
>
>     case EI_ETYPE_ERRNO:
>     if (retv < (unsigned long)-MAX_ERRNO)
>     return (unsigned long)-EINVAL;
>     @@ -48,6 +46,8 @@ static unsigned long adjust_error_retval(unsigned long addr, unsigned long retv)
>     if (retv != 0 && retv < (unsigned long)-MAX_ERRNO)
>     return (unsigned long)-EINVAL;
>     break;
>
> -   case EI_ETYPE_TRUE:
> -         return 1;
>
>
>     }
>
>     return retv;
>     diff --git a/lib/error-inject.c b/lib/error-inject.c
>     index aa63751c916f..c73651b15b76 100644
>     --- a/lib/error-inject.c
>     +++ b/lib/error-inject.c
>     @@ -180,6 +180,8 @@ static const char *error_type_string(int etype)
>     return "ERRNO";
>     case EI_ETYPE_ERRNO_NULL:
>     return "ERRNO_NULL";
>
> -   case EI_ETYPE_TRUE:
> -         return "TRUE";
>
>
>     default:
>     return "(unknown)";
>     }
>     --
>     2.28.0
>