On Tue, May 17, 2016 at 10:32:06PM +0800, Anand Jain wrote:
> For the replace tests we need a device as a spare device,
> here functions _spare_dev_get() and _spare_dev_put()
> will get it from the SCRATCH_DEV_POOL_SAVED, which is set
> when _scratch_dev_pool_get() is called, and is based on how
> many has already been assigned to SCRATCH_DEV_POOL.
>
> usage:
> _scratch_dev_pool_get 3
> _spare_dev_get
>
> SPARE_DEV will have a device set which can be
> used as the replace target device.
>
> _spare_dev_put
> _scratch_dev_pool_put
>
> _spare_dev_get() will pick the next device after SCRATCH_DEV_POOL
> devices, from the SCRATCH_DEV_POOL_SAVED, and assigns it to
> SPARE_DEV. _spare_dev_put() will set to SPARE_DEV to null.
>
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
> ---
> common/rc | 45 +++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 45 insertions(+)
>
> diff --git a/common/rc b/common/rc
> index 33632fd8e4a3..f2b39ddbee0c 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -786,6 +786,51 @@ _scratch_mkfs()
> esac
> }
>
> +_spare_dev_get()
I'd like to see some comments about these helpers in the code. Otherwise
look good to me.
Thanks,
Eryu
> +{
> + typeset -p SCRATCH_DEV_POOL_SAVED >/dev/null 2>&1
> + if [ $? != 0 ]; then
> + _fail "Bug: unset val, must call _scratch_dev_pool_get before _spare_dev_get"
> + fi
> +
> + if [ -z "$SCRATCH_DEV_POOL_SAVED" ]; then
> + _fail "Bug: str empty, must call _scratch_dev_pool_get before _spare_dev_get"
> + fi
> +
> + # Check if the spare is already assigned
> + typeset -p SPARE_DEV >/dev/null 2>&1
> + if [ $? == 0 ]; then
> + if [ ! -z "$SPARE_DEV" ]; then
> + _fail "Bug: SPARE_DEV = $SPARE_DEV already assigned"
> + fi
> + fi
> +
> + local ndevs=`echo $SCRATCH_DEV_POOL| wc -w`
> + local config_ndevs=`echo $SCRATCH_DEV_POOL_SAVED| wc -w`
> +
> + if [ $ndevs -eq $config_ndevs ]; then
> + _notrun "All devs used no spare"
> + fi
> + # Get a dev that is not used
> + local devs[]="( $SCRATCH_DEV_POOL_SAVED )"
> + SPARE_DEV=${devs[@]:$ndevs:1}
> + export SPARE_DEV
> +}
> +
> +_spare_dev_put()
> +{
> + typeset -p SPARE_DEV >/dev/null 2>&1
> + if [ $? != 0 ]; then
> + _fail "Bug: unset val, must call _spare_dev_get before its put"
> + fi
> +
> + if [ -z "$SPARE_DEV" ]; then
> + _fail "Bug: str empty, must call _spare_dev_get before its put"
> + fi
> +
> + export SPARE_DEV=""
> +}
> +
> #
> # $1 Number of the scratch devs required
> #
> --
> 2.7.0
>
> --
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