linux-kernel - Re: [PATCH] selftests/mount: output error messages when mount test fail

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Date:	Fri, 3 Apr 2015 09:17:28 +0800
From:	Zhang Zhen <zhenzhang.zhang@...wei.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	<linux-api@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	<shuahkh@....samsung.com>, <mpe@...erman.id.au>
Subject: Re: [PATCH] selftests/mount: output error messages when mount test
 fail

On 2015/4/3 2:56, Eric W. Biederman wrote:
> Zhang Zhen <zhenzhang.zhang@...wei.com> writes:
> 
>> Without this patch, if /proc/self/uid_map is not exist,
>> the mount test case will fail and no any prompting.
> 
> The intent was not to fail if /proc/self/uid_map is missing but to skip
> the test because it is not applicable.
> 
> Making this an error seems wrong.  Even if I did mess up the shell
> script error propagation and made it an error by accident.
> 
Ok， modify the output messages as follows：
WARN: No /proc/self/uid_map exist, test skipped.

Do you think this modification right?

Best regards!
>> After applied this patch, the case will prompt why it fail.
>> Just as follows:
>> root@...nel-host:/opt/kernel> make -C tools/testing/selftests TARGETS=mount run_tests
>> make: Entering directory `/opt/kernel/tools/testing/selftests'
>> for TARGET in mount; do \
>>                 make -C $TARGET; \
>>         done;
>> make[1]: Entering directory `/opt/kernel/tools/testing/selftests/mount'
>> make[1]: Nothing to be done for `all'.
>> make[1]: Leaving directory `/opt/kernel/tools/testing/selftests/mount'
>> for TARGET in mount; do \
>>                 make -C $TARGET run_tests; \
>>         done;
>> make[1]: Entering directory `/opt/kernel/tools/testing/selftests/mount'
>> ERROR: No /proc/self/uid_map exist
>> make[1]: Leaving directory `/opt/kernel/tools/testing/selftests/mount'
>> make: Leaving directory `/opt/kernel/tools/testing/selftests'
>>
>> Signed-off-by: Zhang Zhen <zhenzhang.zhang@...wei.com>
>> ---
>>  tools/testing/selftests/mount/Makefile | 7 ++++++-
>>  1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/tools/testing/selftests/mount/Makefile b/tools/testing/selftests/mount/Makefile
>> index a5b367f..b3266db 100644
>> --- a/tools/testing/selftests/mount/Makefile
>> +++ b/tools/testing/selftests/mount/Makefile
>> @@ -8,7 +8,12 @@ unprivileged-remount-test: unprivileged-remount-test.c
>>  include ../lib.mk
>>
>>  TEST_PROGS := unprivileged-remount-test
>> -override RUN_TESTS := if [ -f /proc/self/uid_map ] ; then ./unprivileged-remount-test ; fi
>> +override RUN_TESTS :=  @if [ -f /proc/self/uid_map ] ; \
>> +			then	\
>> +				./unprivileged-remount-test ; \
>> +			else	\
>> +				echo "ERROR: No /proc/self/uid_map exist" ; \
>> +			fi
>>  override EMIT_TESTS := echo "$(RUN_TESTS)"
>>
>>  clean:
> 
> 


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