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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>
65 lines
2.2 KiB
Bash
Executable File
65 lines
2.2 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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# FSQA Test No. 102
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#
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# Regression test for an ENOSPC issue when attempting to write to a file in
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# a filesystem without any data block groups allocated.
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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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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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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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# 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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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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# Mount our filesystem without space caches enabled so that we do not get any
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# space used from the initial data block group that mkfs creates (space caches
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# used space from data block groups).
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_scratch_mount "-o nospace_cache"
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# Need an fs with at least 2Gb to make sure mkfs.btrfs does not create an fs
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# using mixed block groups (used both for data and metadata). We really need
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# to have dedicated block groups for data to reproduce the issue and mkfs.btrfs
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# defaults to mixed block groups only for small filesystems (up to 1Gb).
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_require_fs_space $SCRATCH_MNT $((2 * 1024 * 1024))
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# Run balance with the purpose of deleting the unused data block group that
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# mkfs created. We could also wait for the background kthread to automatically
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# delete the unused block group, but we do not have a way to make it run and
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# wait for it to complete, so just do a balance instead of some unreliable sleep
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_run_btrfs_util_prog balance start -dusage=0 $SCRATCH_MNT
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# Now unmount the filesystem, mount it again (either with or with space caches
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# enabled, it does not matter to trigger the problem) and attempt to create a
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# file with some data - this used to fail with ENOSPC because there were no
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# data block groups when the filesystem was mounted and the data space info
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# object was marked as full when initialized (because it had 0 total bytes),
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# which prevented the file write path from attempting to allocate a data block
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# group and fail immediately with ENOSPC.
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_scratch_cycle_mount
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echo "hello world" > $SCRATCH_MNT/foobar
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echo "Silence is golden"
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status=0
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exit
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