path: root/tests/misc-tests/004-shrink-fs/
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authorNicholas D Steeves <>2016-04-23 00:41:30 +0100
committerNicholas D Steeves <>2016-04-23 00:41:30 +0100
commitcec572daccafa1e912cbed363df6f84687778c6f (patch)
tree7d99ab9f73d25c1ed8eaf6393f6374edf5316b03 /tests/misc-tests/004-shrink-fs/
btrfs-progs (4.4.1-1.1) unstable; urgency=medium
* Non-maintainer upload. * New upstream release. * Rename package to btrfs-progs (Closes: #780081) * Update standards version to 3.9.7 (no changes needed). * debian/control: Add "Breaks" per Gianfranco Costamagna's suggestion * Change lintian override to reflect package rename * Switch from using postinst and postrm to using triggers per Christian Seiler's recommendation. # imported from the archive
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+# Test getting the minimum size a filesystem can be resized to and verify we
+# are able to resize (shrink) it to that size.
+source $TOP/tests/common
+check_prereq mkfs.btrfs
+check_prereq btrfs
+# Optionally take id of the device to shrink
+ min_size=$(run_check_stdout $SUDO_HELPER $TOP/btrfs inspect-internal min-dev-size ${1:+--id $1} $TEST_MNT)
+ min_size=$(echo $min_size | cut -d ' ' -f 1)
+ echo "min size = ${min_size}" >> $RESULTS
+ if [ -z "$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
+# 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
+# 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
+run_check $SUDO_HELPER umount $TEST_MNT