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