99 lines
3.5 KiB
Bash
Executable File
99 lines
3.5 KiB
Bash
Executable File
#!/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
|