Re: [PATCH 1/2] common/rc: add functions to check or write objects under /sys/fs/$FSTYP

[Zirong Lang <zlang@redhat.com>]

Sorry, I sent wrong patch. Please ignore this patch.
This's not the real [PATCH 1/2].  I'll resend both patches later.

Thanks,
Zorro

----- 原始邮件 -----
> 发件人: "Zorro Lang" <zlang@redhat.com>
> 收件人: fstests@vger.kernel.org
> 抄送: xfs@oss.sgi.com, "Zorro Lang" <zlang@redhat.com>
> 发送时间: 星期六, 2016年 8 月 20日 上午 1:51:44
> 主题: [PATCH 1/2] common/rc: add functions to check or write objects under /sys/fs/$FSTYP
> 
> XFS add more configurations in /sys/fs/xfs recently. For use
> them, this patch add some common functions for:
>   1. "require" a file/dir in /sys/fs/${FSTYP}.
>   2. write a file in /sys/fs/${FSTYP}.
> 
> For common use, these functions can be used by other filesystems.
> 
> Signed-off-by: Zorro Lang <zlang@redhat.com>
> ---
>  common/rc | 42 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 42 insertions(+)
> 
> diff --git a/common/rc b/common/rc
> index 51092a0..d5edfef 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -3556,6 +3556,48 @@ run_fsx()
>  	fi
>  }
>  
> +# Test for the existence of a sysfs entry at /sys/fs/$FSTYP/$DEV/$ENTRY
> +_require_fs_sysfs()
> +{
> +	local dev=$1
> +	local entry=$2
> +	local tmp_mnt=`mktemp -d`
> +
> +	if [ ! -b "$dev" -o -z "$entry" ];then
> +		_fail "Usage: _require_fs_sysfs <device> <sysfs_path>"
> +        fi
> +
> +	local dname=$(_short_dev $dev)
> +	_mount -t $FSTYP `_common_dev_mount_options` $dev $tmp_mnt
> +	if [ $? -ne 0 ];then
> +		rm -f $tmp_mnt
> +		_fail "_require_fs_sysfs: could not mount, mkfs first in your test?"
> +	elif [ ! -e /sys/fs/${FSTYP}/${dname}/${entry} ];then
> +		$UMOUNT_PROG $tmp_mnt
> +		rm -f $tmp_mnt
> +		_notrun "/sys/fs/${FSTYP}/${dname}/${entry}: No such file or directory"
> +	fi
> +	$UMOUNT_PROG $tmp_mnt
> +	rm -rf $tmp_mnt
> +}
> +
> +# Write "content" into /sys/fs/$FSTYP/$DEV/$ENTRY
> +_set_fs_sysfs_param()
> +{
> +	local dev=$1
> +	shift
> +	local entry=$1
> +	shift
> +	local content="$*"
> +
> +	if [ ! -b "$dev" -o -z "$entry" -o -z "$content" ];then
> +		_fail "Usage: _set_sys_fs_param <mounted_device> <entry> <content>"
> +	fi
> +
> +	local dname=$(_short_dev $dev)
> +	echo "$content" > /sys/fs/${FSTYP}/${dname}/${entry}
> +}
> +
>  init_rc
>  
>  ################################################################################
> --
> 2.5.5
> 
> --
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