diff options
author | Su Yue <suy.fnst@cn.fujitsu.com> | 2018-04-12 09:10:28 +0800 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2018-06-07 16:37:36 +0200 |
commit | e2eb6dc4d405e21a7ded3c2a2508f6979a5d39c9 (patch) | |
tree | 4c457804a84d011949ba1acc1215724289b729be | |
parent | 42a5710acadac8bab9383c759affa3a4ff02d895 (diff) |
btrfs-progs: tests: test mkfs.btrfs fails on small backing size thin provision device
This tests is most similar to xfstests generic/405.
It calls device mapper to create a thin provision device with small
backing size and big virtual size. mkfs.btrfs should fail on such
devices.
This test should pass after commit e805b143a4fe
("btrfs-progs: mkfs: return nozero value on thin provisioned device").
Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-rwxr-xr-x | tests/mkfs-tests/017-small-backing-size-thin-provision-device/test.sh | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/tests/mkfs-tests/017-small-backing-size-thin-provision-device/test.sh b/tests/mkfs-tests/017-small-backing-size-thin-provision-device/test.sh new file mode 100755 index 00000000..32640ce5 --- /dev/null +++ b/tests/mkfs-tests/017-small-backing-size-thin-provision-device/test.sh @@ -0,0 +1,98 @@ +#!/bin/bash +# mkfs.btrfs must fail on a thin provision device with very small backing size +# and big virtual size. + +source "$TEST_TOP/common" + +check_prereq mkfs.btrfs +check_global_prereq udevadm +check_global_prereq dmsetup + +setup_root_helper +prepare_test_dev + +# Backing data dev +DMTHIN_DATA_NAME="btrfs-progs-thin-data" +DMTHIN_DATA_DEV="/dev/mapper/$DMTHIN_DATA_NAME" +# Backing metadata dev +DMTHIN_META_NAME="btrfs-progs-thin-meta" +DMTHIN_META_DEV="/dev/mapper/$DMTHIN_META_NAME" +# Backing pool dev (combination of above) +DMTHIN_POOL_NAME="btrfs-progs-thin-pool" +DMTHIN_POOL_DEV="/dev/mapper/$DMTHIN_POOL_NAME" +# Thin volume +DMTHIN_VOL_NAME="btrfs-progs-thin-vol" +DMTHIN_VOL_DEV="/dev/mapper/$DMTHIN_VOL_NAME" + +dmthin_cleanup() +{ + # wait for device to be fully settled + run_check $SUDO_HELPER udevadm settle + run_check $SUDO_HELPER dmsetup remove "$DMTHIN_VOL_NAME" + run_check $SUDO_HELPER dmsetup remove "$DMTHIN_POOL_NAME" + run_check $SUDO_HELPER dmsetup remove "$DMTHIN_META_NAME" + run_check $SUDO_HELPER dmsetup remove "$DMTHIN_DATA_NAME" +} + +sector_size=512 # in bytes +data_dev_size=$((1 * 1024 * 1024 / $sector_size)) # 1M +virtual_size=$((1 * 1024 * 1024 * 1024 * 1024 / $sector_size)) # 1T +cluster_size=1024 # 512k in sectors +low_water=$((104857600 / $cluster_size/ $sector_size)) # 100M / $cluster_size, in sectors + +# Need to make linear metadata and data devs. From kernel docs: +# As a guide, we suggest you calculate the number of bytes to use in the +# metadata device as 48 * $data_dev_size / $data_block_size but round it up +# to 2MB (4096 sectors) if the answer is smaller. +# So do that: +meta_dev_size=$((48 * $data_dev_size / $cluster_size)) +if [ "$meta_dev_size" -lt "4096" ]; then + meta_dev_size=4096 # 2MB +fi + +meta_dev_offset=0 +total_data_dev_size=$(($meta_dev_offset + $meta_dev_size + $data_dev_size)) + +run_check truncate -s0 img +chmod a+w img +run_check truncate -s"$(($total_data_dev_size * $sector_size))" img + +dm_backing_dev=`run_check_stdout $SUDO_HELPER losetup --find --show img` + +if ! [ -b "$dm_backing_dev" ]; then + _fail "cannot create backing device" +fi + +# Metadata device +DMTHIN_META_TABLE="0 $meta_dev_size linear $dm_backing_dev $meta_dev_offset" +run_check $SUDO_HELPER dmsetup create "$DMTHIN_META_NAME" --table "$DMTHIN_META_TABLE" + +# Data device +data_dev_offset=$((meta_dev_offset + $meta_dev_size)) +DMTHIN_DATA_TABLE="0 $data_dev_size linear $dm_backing_dev $data_dev_offset" +run_check $SUDO_HELPER dmsetup create "$DMTHIN_DATA_NAME" --table "$DMTHIN_DATA_TABLE" + +# Zap the pool metadata dev +run_check $SUDO_HELPER dd if=/dev/zero of="$DMTHIN_META_DEV" bs=4096 count=1 + +# Thin pool +# "start length thin-pool metadata_dev data_dev data_block_size low_water_mark" +DMTHIN_POOL_TABLE="0 $data_dev_size thin-pool $DMTHIN_META_DEV $DMTHIN_DATA_DEV $cluster_size $low_water" +run_check $SUDO_HELPER dmsetup create "$DMTHIN_POOL_NAME" --table "$DMTHIN_POOL_TABLE" + +# Thin volume +pool_id=$RANDOM +run_check $SUDO_HELPER dmsetup message "$DMTHIN_POOL_DEV" 0 "create_thin $pool_id" + +# start length thin pool_dev dev_id [external_origin_dev] +DMTHIN_VOL_TABLE="0 $virtual_size thin $DMTHIN_POOL_DEV $pool_id" +run_check $SUDO_HELPER dmsetup create "$DMTHIN_VOL_NAME" --table "$DMTHIN_VOL_TABLE" + +# mkfs.btrfs should fail due to the small backing device, the initial discard +# is disabled +run_mustfail "should fail for small backing size thin provision device" \ + $SUDO_HELPER "$TOP/mkfs.btrfs" -K -f "$DMTHIN_VOL_DEV" + +dmthin_cleanup +run_mayfail $SUDO_HELPER losetup -d "$dm_backing_dev" +rm -- img |