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https://github.com/linux-apfs/apfstests.git
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Josef Bacik
1c22274b8c
There was some confused about what the fs was supposed to do when you truncate at i_size with preallocated space past i_size. We decided on the following things 1) truncate(i_size) will trim all blocks past i_size. 2) truncate(x) where x > i_size will not trim all blocks past i_size. This test is to make sure we're all acting sanely. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
72 lines
2.1 KiB
Bash
72 lines
2.1 KiB
Bash
#! /bin/bash
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# FS QA Test No. 092
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#
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# fallocate/truncate tests with FALLOC_FL_KEEP_SIZE option.
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# Verify if the disk space is released after truncating a file to i_size after
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# writing to a portion of a preallocated range.
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#
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# This also verifies that truncat'ing up past i_size doesn't remove the
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# preallocated space.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015 Facebook. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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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=0 # success 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 $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/punch
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs generic
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_supported_os Linux
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_require_test
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_require_xfs_io_command "falloc"
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_require_fiemap
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# First test to make sure that truncating at i_size trims the preallocated bit
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# past i_size
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$XFS_IO_PROG -f -c "falloc -k 0 10M" -c "pwrite 0 5M" -c "truncate 5M"\
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$TEST_DIR/testfile.$seq | _filter_xfs_io
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sync
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$XFS_IO_PROG -c "fiemap -v" $TEST_DIR/testfile.$seq | _filter_fiemap
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# Now verify that if we truncate up past i_size we don't trim the preallocated
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# bit
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$XFS_IO_PROG -c "falloc -k 5M 5M" -c "truncate 7M" $TEST_DIR/testfile.$seq
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$XFS_IO_PROG -c "fiemap -v" $TEST_DIR/testfile.$seq | _filter_fiemap
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# success, all done
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exit
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