Re: [PATCH v4 1/5] fstests: common/rc: set_fs_sysfs_attr: redirect errors to stdout

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On Fri, Feb 28, 2025 at 01:55:19PM +0800, Anand Jain wrote:
> Redirect sysfs write errors to stdout as a preparatory patch to enable
> testing of expected sysfs write failures. Also, log the executed
> sysfs write command and its failure if any to seqres.full for better
> debugging and traceability.
> 
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
> ---
>  common/rc | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/common/rc b/common/rc
> index c7d7dbb8e93b..59af83a01e3a 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -5181,7 +5181,8 @@ _set_fs_sysfs_attr()
>  
>  	local dname=$(_fs_sysfs_dname $dev)
>  
> -	echo "$content" > /sys/fs/${FSTYP}/${dname}/${attr}
> +	echo "echo '$content' 2>&1 > /sys/fs/${FSTYP}/${dname}/${attr}" >> $seqres.full
> +	echo "$content" 2>&1 > /sys/fs/${FSTYP}/${dname}/${attr} | tee -a $seqres.full

Actually I doubt the $seqres might be not defined before calling _set_fs_sysfs_attr.
For example, we call _set_fs_sysfs_attr in ./check as

 _test_mount -> _prepare_for_eio_shutdown -> _xfs_prepare_for_eio_shutdown -> _set_fs_sysfs_attr

The _test_mount is called before $seqres is defined. At that time, the $seqres.full
will be ".full" if the FSTYP=xfs

Anyway, we can fix this problem in another patch, this
patch is good to me,

Reviewed-by: Zorro Lang <zlang@xxxxxxxxxx>

>  }
>  
>  # Print the content of /sys/fs/$FSTYP/$DEV/$ATTR
> -- 
> 2.47.0
> 
> 





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