From: Anand Jain <Anand.Jain@xxxxxxxxxx>
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>
---
v2: Added comments
common/rc | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/common/rc b/common/rc
index 31c46ba1226e..ffdbfcdae68d 100644
--- a/common/rc
+++ b/common/rc
@@ -802,6 +802,65 @@ _scratch_mkfs()
esac
}
+# Helper function to get a spare or replace-target device from
+# configured SCRATCH_DEV_POLL, must call _scratch_dev_pool_get()
+# before _spare_dev_get(). Replace-target-device/Spare-device will
+# be assigned to SPARE_DEV.
+# As of now only one replace-target-device/spare-device can be
+# assigned.
+#
+# Usage:
+# _scratch_dev_pool_get() <ndevs>
+# _spare_dev_get()
+# :: do stuff
+# _spare_dev_put()
+# _scratch_dev_pool_put()
+#
+_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=""
+}
+
#
# Generally test cases will have..
# _require_scratch_dev_pool X
--
2.7.0
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