80 lines
2.5 KiB
Bash
Executable File
80 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Test getting the minimum size a filesystem can be resized to and verify we
|
|
# are able to resize (shrink) it to that size.
|
|
#
|
|
|
|
source "$TEST_TOP/common"
|
|
|
|
check_prereq mkfs.btrfs
|
|
check_prereq btrfs
|
|
|
|
setup_root_helper
|
|
|
|
_get_min_dev_size()
|
|
{
|
|
size=$(run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal \
|
|
min-dev-size ${1:+--id "$1"} "$TEST_MNT" | \
|
|
grep -e "^[[:digit:]]\+.*)$" | cut -d ' ' -f 1)
|
|
echo "$size"
|
|
}
|
|
|
|
# Optionally take id of the device to shrink
|
|
shrink_test()
|
|
{
|
|
min_size=$(_get_min_dev_size "$1")
|
|
_log "min size = ${min_size}"
|
|
if [ -z "$min_size" ]; then
|
|
_fail "Failed to parse minimum size"
|
|
fi
|
|
run_check $SUDO_HELPER "$TOP/btrfs" filesystem resize "$min_size" "$TEST_MNT"
|
|
}
|
|
|
|
run_check truncate -s 20G "$IMAGE"
|
|
run_check "$TOP/mkfs.btrfs" -f "$IMAGE"
|
|
run_check $SUDO_HELPER mount "$IMAGE" "$TEST_MNT"
|
|
run_check $SUDO_HELPER chmod a+rw "$TEST_MNT"
|
|
|
|
# Create 7 data block groups, each with a size of 1Gb.
|
|
for ((i = 1; i <= 7; i++)); do
|
|
run_check fallocate -l 1G "$TEST_MNT/foo$i"
|
|
done
|
|
|
|
# Make sure they are persisted (all the chunk, device and block group items
|
|
# added to the chunk/dev/extent trees).
|
|
run_check "$TOP/btrfs" filesystem sync "$TEST_MNT"
|
|
|
|
# Now remove 3 of those 1G files. This will result in 3 block groups becoming
|
|
# unused, which will be automatically deleted by the cleaner kthread, and this
|
|
# will result in 3 holes (unallocated space) in the device (each with a size
|
|
# of 1Gb).
|
|
|
|
run_check rm -f "$TEST_MNT/foo2"
|
|
run_check rm -f "$TEST_MNT/foo4"
|
|
run_check rm -f "$TEST_MNT/foo6"
|
|
|
|
# Sync once to wake up the cleaner kthread which will delete the unused block
|
|
# groups - it could have been sleeping when they became unused. Then wait a bit
|
|
# to allow the cleaner kthread to delete them and then finally ensure the
|
|
# transaction started by the cleaner kthread is committed.
|
|
run_check "$TOP/btrfs" filesystem sync "$TEST_MNT"
|
|
sleep 3
|
|
run_check "$TOP/btrfs" filesystem sync "$TEST_MNT"
|
|
|
|
# Now attempt to get the minimum size we can resize the filesystem to and verify
|
|
# the resize operation succeeds. This size closely matches the sum of the size
|
|
# of all the allocated device extents.
|
|
for ((i = 1; i <= 3; i++)); do
|
|
shrink_test
|
|
done
|
|
|
|
# Now convert metadata and system chunks to the single profile and check we are
|
|
# still able to get a correct minimum size and shrink to that size.
|
|
run_check $SUDO_HELPER "$TOP/btrfs" balance start -mconvert=single \
|
|
-sconvert=single -f "$TEST_MNT"
|
|
for ((i = 1; i <= 3; i++)); do
|
|
shrink_test 1
|
|
done
|
|
|
|
run_check $SUDO_HELPER umount "$TEST_MNT"
|