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btrfs: new case to run btrfs balance and device replace operations simultaneously

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Run btrfs balance and replace operations simultaneously with fsstress
running in background.

Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eryu Guan
2014-10-14 22:59:37 +11:00
committed by Dave Chinner
parent ff2435afec
commit 3712e702d0
4 changed files with 198 additions and 0 deletions
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common/rc
+73
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@@ -2160,6 +2160,24 @@ _require_scratch_dev_pool()
done
}
# ensure devices in SCRATCH_DEV_POOL are of the same size
# must be called after _require_scratch_dev_pool
_require_scratch_dev_pool_equal_size()
{
local _size
local _newsize
local _dev
# SCRATCH_DEV has been set to the first device in SCRATCH_DEV_POOL
_size=`_get_device_size $SCRATCH_DEV`
for _dev in $SCRATCH_DEV_POOL; do
_newsize=`_get_device_size $_dev`
if [ $_size -ne $_newsize ]; then
_notrun "This test requires devices in SCRATCH_DEV_POOL have the same size"
fi
done
}
# We will check if the device is deletable
_require_deletable_scratch_dev_pool()
{
@@ -2631,6 +2649,61 @@ _btrfs_stress_remount_compress()
done
}
# stress btrfs by replacing devices in a loop
# Note that at least 3 devices are needed in SCRATCH_DEV_POOL and the last
# device should be free(not used by btrfs)
_btrfs_stress_replace()
{
local btrfs_mnt=$1
# The device number in SCRATCH_DEV_POOL should be at least 3,
# one is SCRATCH_DEV, one is to be replaced, one is free device
# we won't replace SCRATCH_DEV, see below for reason
if [ "`echo $SCRATCH_DEV_POOL | wc -w`" -lt 3 ]; then
echo "_btrfs_stress_replace requires at least 3 devices in SCRATCH_DEV_POOL"
return
fi
# take the last device as the first free_dev
local free_dev="`echo $SCRATCH_DEV_POOL | $AWK_PROG '{print $NF}'`"
# free_dev should be really free
if $BTRFS_UTIL_PROG filesystem show $btrfs_mnt | grep -q "$free_dev"; then
echo "_btrfs_stress_replace: $free_dev is used by btrfs"
return
fi
# dev_pool is device list being currently used by btrfs (excluding SCRATCH_DEV)
# and can be replaced. We don't replace SCRATCH_DEV because it will be used in
# _scratch_mount and _check_scratch_fs etc.
local dev_pool=`echo $SCRATCH_DEV_POOL | sed -e "s# *$SCRATCH_DEV *##" \
-e "s# *$free_dev *##"`
# set the first device in dev_pool as the first src_dev to be replaced
local src_dev=`echo $dev_pool | $AWK_PROG '{print $1}'`
echo "dev_pool=$dev_pool"
echo "free_dev=$free_dev, src_dev=$src_dev"
while true; do
echo "Replacing $src_dev with $free_dev"
$BTRFS_UTIL_PROG replace start -fB $src_dev $free_dev $btrfs_mnt
if [ $? -ne 0 ]; then
# don't update src_dev and free_dev if replace failed
continue
fi
dev_pool="$dev_pool $free_dev"
dev_pool=`echo $dev_pool | sed -e "s# *$src_dev *##"`
free_dev=$src_dev
src_dev=`echo $dev_pool | $AWK_PROG '{print $1}'`
done
}
# return device size in kb
_get_device_size()
{
grep `_short_dev $1` /proc/partitions | awk '{print $3}'
}
init_rc()
{
if [ "$iam" == new ]