mirror of
https://github.com/linux-apfs/apfstests.git
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Dave Chinner
1ff4192932
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
140 lines
4.1 KiB
Bash
Executable File
140 lines
4.1 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. btrfs/104
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#
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# Test btrfs quota group consistency operations during snapshot
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# delete. Btrfs has had long standing issues with drop snapshot
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# failing to properly account for quota groups. This test crafts
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# several snapshot trees with shared and exclusive elements. One of
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# the trees is removed and then quota group consistency is checked.
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#
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# This issue is fixed by the following linux kernel patches:
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#
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# Btrfs: use btrfs_get_fs_root in resolve_indirect_ref
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# Btrfs: keep dropped roots in cache until transaciton commit
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# btrfs: qgroup: account shared subtree during snapshot delete
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_require_btrfs_qgroup_report
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rm -f $seqres.full
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# Create an fs tree of a given height at a target location. This is
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# done by agressively creating inline extents to expand the number of
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# nodes required. We also add an traditional extent so that
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# drop_snapshot is forced to walk at least one extent that is not
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# stored in metadata.
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#
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# NOTE: The ability to vary tree height for this test is very useful
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# for debugging problems with drop_snapshot(). As a result we retain
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# that parameter even though the test below always does level 2 trees.
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_explode_fs_tree () {
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local level=$1;
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local loc="$2";
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local n;
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if [ -z $loc ]; then
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echo "specify location for fileset"
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exit 1;
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fi
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case $level in
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1)# this always reproduces level 1 trees
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n=10;
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;;
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2)# this always reproduces level 2 trees
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n=1500
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;;
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3)# this always reproduces level 3 trees
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n=1000000;
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;;
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*)
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echo "Can't make level $level trees";
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exit 1;
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;;
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esac
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mkdir -p $loc
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for i in `seq -w 1 $n`; do
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$XFS_IO_PROG -f -c "pwrite 0 4095" $loc/file$i > /dev/null 2>&1
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done
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$XFS_IO_PROG -f -c "pwrite 0 128k" $loc/extentfile > /dev/null 2>&1
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}
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# Force the default leaf size as the calculations for making our btree
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# heights are based on that.
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_scratch_mkfs "--nodesize 16384" >> $seqres.full 2>&1
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_scratch_mount
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# populate the default subvolume and create a snapshot ('snap1')
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_explode_fs_tree 1 $SCRATCH_MNT/files
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_run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT $SCRATCH_MNT/snap1
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# create new btree nodes in this snapshot. They will become shared
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# with the next snapshot we create.
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_explode_fs_tree 1 $SCRATCH_MNT/snap1/files-snap1
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# create our final snapshot ('snap2'), populate it with
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# exclusively owned nodes.
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#
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# As a result of this action, snap2 will get an implied ref to the
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# 128K extent created in the default subvolume.
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_run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT/snap1 $SCRATCH_MNT/snap2
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_explode_fs_tree 1 $SCRATCH_MNT/snap2/files-snap2
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# Enable qgroups now that we have our filesystem prepared. This
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# will kick off a scan which we will have to wait for.
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_run_btrfs_util_prog quota enable $SCRATCH_MNT
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_run_btrfs_util_prog quota rescan -w $SCRATCH_MNT
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# Remount to clear cache, force everything to disk
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_scratch_cycle_mount
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# Finally, delete snap1 to trigger btrfs_drop_snapshot(). This
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# snapshot is most interesting to delete because it will cause some
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# nodes to go exclusively owned for snap2, while some will stay shared
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# with the default subvolume. That exercises a maximum of the drop
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# snapshot/qgroup interactions.
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#
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# snap2s imlied ref from to the 128K extent in files/ can be lost by
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# the root finding code in qgroup accounting due to snap1 no longer
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# providing a path to it. This was fixed by the first two patches
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# referenced above.
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_run_btrfs_util_prog subvolume delete $SCRATCH_MNT/snap1
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# "btrfs filesystem sync" will trigger subvolume deletion
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_run_btrfs_util_prog filesystem sync $SCRATCH_MNT
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# Qgroup will be checked by fstest at _check_scratch_fs()
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status=0
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exit
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