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c220771a47
It turns out, no, in fact, ZERO_RANGE and PUNCH_HOLE do have differing semantics in some ways - in particular, one requires KEEP_SIZE, and the other does not. Also added a zero-range test to catch this, corrected a flaw that made the punch-hole test succeed vacuously, and a typo in file_write. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rich Ercolani <rincebrain@gmail.com> Closes #13329 Closes #13338
120 lines
3.4 KiB
Bash
Executable File
120 lines
3.4 KiB
Bash
Executable File
#!/bin/ksh -p
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#
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# CDDL HEADER START
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#
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# The contents of this file are subject to the terms of the
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# Common Development and Distribution License (the "License").
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# You may not use this file except in compliance with the License.
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#
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# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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# or http://www.opensolaris.org/os/licensing.
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# See the License for the specific language governing permissions
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# and limitations under the License.
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#
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# When distributing Covered Code, include this CDDL HEADER in each
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# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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# If applicable, add the following below this CDDL HEADER, with the
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# fields enclosed by brackets "[]" replaced with your own identifying
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# information: Portions Copyright [yyyy] [name of copyright owner]
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#
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# CDDL HEADER END
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#
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#
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# Copyright (c) 2020 by Lawrence Livermore National Security, LLC.
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# Copyright (c) 2021 by The FreeBSD Foundation.
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#
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. $STF_SUITE/include/libtest.shlib
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#
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# DESCRIPTION:
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# Test FALLOC_FL_ZERO_RANGE functionality
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#
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# STRATEGY:
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# 1. Create a dense file
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# 2. Zero various ranges in the file and verify the result.
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#
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verify_runnable "global"
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if is_freebsd; then
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log_unsupported "FreeBSD does not implement an analogue to ZERO_RANGE."
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fi
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FILE=$TESTDIR/$TESTFILE0
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BLKSZ=$(get_prop recordsize $TESTPOOL)
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function cleanup
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{
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[[ -e $TESTDIR ]] && log_must rm -f $FILE
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}
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# Helpfully, this function expects kilobytes, and check_apparent_size expects bytes.
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function check_reported_size
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{
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typeset expected_size=$1
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if ! [ -e "${FILE}" ]; then
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log_fail "$FILE does not exist"
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fi
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reported_size=$(du "${FILE}" | awk '{print $1}')
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if [ "$reported_size" != "$expected_size" ]; then
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log_fail "Incorrect reported size: $reported_size != $expected_size"
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fi
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}
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function check_apparent_size
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{
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typeset expected_size=$1
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apparent_size=$(stat_size "${FILE}")
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if [ "$apparent_size" != "$expected_size" ]; then
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log_fail "Incorrect apparent size: $apparent_size != $expected_size"
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fi
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}
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log_assert "Ensure ranges can be zeroed in files"
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log_onexit cleanup
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# Create a dense file and check it is the correct size.
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log_must file_write -o create -f $FILE -b $BLKSZ -c 8
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sync_pool $TESTPOOL
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log_must check_reported_size 1027
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# Zero a range covering the first full block.
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log_must zero_range 0 $BLKSZ $FILE
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sync_pool $TESTPOOL
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log_must check_reported_size 899
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# Partially zero a range in the second block.
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log_must zero_range $BLKSZ $((BLKSZ / 2)) $FILE
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sync_pool $TESTPOOL
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log_must check_reported_size 899
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# Zero range which overlaps the third and fourth block.
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log_must zero_range $(((BLKSZ * 2) + (BLKSZ / 2))) $((BLKSZ)) $FILE
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sync_pool $TESTPOOL
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log_must check_reported_size 899
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# Zero range from the fifth block past the end of file, with --keep-size.
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# The apparent file size must not change, since we did specify --keep-size.
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apparent_size=$(stat_size $FILE)
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log_must fallocate --keep-size --zero-range --offset $((BLKSZ * 4)) --length $((BLKSZ * 10)) "$FILE"
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sync_pool $TESTPOOL
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log_must check_reported_size 387
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log_must check_apparent_size $apparent_size
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# Zero range from the fifth block past the end of file. The apparent
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# file size should change since --keep-size is not implied, unlike
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# with PUNCH_HOLE.
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apparent_size=$(stat_size $FILE)
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log_must zero_range $((BLKSZ * 4)) $((BLKSZ * 10)) $FILE
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sync_pool $TESTPOOL
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log_must check_reported_size 387
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log_must check_apparent_size $((BLKSZ * 14))
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log_pass "Ensure ranges can be zeroed in files"
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