[LTP] [PATCH v2] commands/mkswap: Added new testcase to test mkswap(8).

[Alexey Kodanev <alexey.kodanev@oracle.com>]

Hi,
On 11/09/2015 11:02 AM, Guangwen Feng wrote:
> Test mkswap(8) command with some basic options.
>
> Signed-off-by: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
> ---
>   runtest/commands                      |   1 +
>   testcases/commands/mkswap/Makefile    |  22 +++++
>   testcases/commands/mkswap/mkswap01.sh | 155 ++++++++++++++++++++++++++++++++++
>   3 files changed, 178 insertions(+)
>   create mode 100644 testcases/commands/mkswap/Makefile
>   create mode 100755 testcases/commands/mkswap/mkswap01.sh
...
> ...
> +
> +mkswap_verify()
> +{
> +	local mkswap_op=$1
> +	local op_arg=$2
> +	local device=$3
> +	local size=$4
> +
> +	local ret=0
> +
> +	local before=`free | grep "Swap" | awk '{print $2}'`
> +
> +	if [ -z "$size" ]; then
> +		local swapsize=$DEVICE_SIZE
> +	else
> +		local swapsize=$size
> +	fi

No need to check it here if you define single variable, i.e. 
size=${4:-$DEVICE_SIZE}

> +
> +	if [ "$mkswap_op" = "-p" ]; then
> +		local pagesize=$op_arg
> +	else
> +		local pagesize=$PAGE_SIZE
> +	fi
> +
> +	if [ "$mkswap_op" = "-L" ]; then
> +		local swap_op="-L"
> +		local swapfile=$op_arg
> +	elif [ "$mkswap_op" = "-U" ]; then
> +		local swap_op="-U"

'swap_op' var is redundant, instead just set "mkswap_op=" in the else 
branch below.

> +		local swapfile=$op_arg
> +	else
> +		local swap_op=""
> +		local swapfile=$device
> +	fi
> +

> +	swapon $swap_op $swapfile 2>/dev/null
> +	if [ $? -ne 0 ]; then
> +		tst_resm TINFO "can not do swapon on $swapfile."
> +		if [ $pagesize -ne $PAGE_SIZE ]; then
> +			return $ret
> +		fi
> +
> +		if [ $swapsize -gt $DEVICE_SIZE ]; then
> +			return $ret
> +		fi
> +	fi
> +

There are two conditions that returns 0 when swapon command fails. If it 
is expected result, could you provide more informative tst_resm message 
in each case. Other cases should return 1, right? But the test proceeds 
further.

Thanks,
Alexey