From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:49660 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932360AbcEQOc0 (ORCPT ); Tue, 17 May 2016 10:32:26 -0400 From: Anand Jain To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, Anand Jain Subject: [PATCH 2/6] fstests: btrfs: add functions to get and put a device for replace target Date: Tue, 17 May 2016 22:32:06 +0800 Message-Id: <1463495530-425-2-git-send-email-anand.jain@oracle.com> In-Reply-To: <1463495530-425-1-git-send-email-anand.jain@oracle.com> References: <1463495530-425-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: 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 --- 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() +{ + 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