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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>
74 lines
2.0 KiB
Bash
Executable File
74 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2014 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. btrfs/035
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#
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# Regression test for overwriting clones
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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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_cleanup()
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{
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rm -f $tmp.*
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}
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trap "_cleanup ; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_require_cloner
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount
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src_str="aaaaaaaaaa"
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echo -n "$src_str" > $SCRATCH_MNT/src
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$CLONER_PROG $SCRATCH_MNT/src $SCRATCH_MNT/src.clone1
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src_str="bbbbbbbbbbcccccccccc"
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echo -n "$src_str" > $SCRATCH_MNT/src
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$CLONER_PROG $SCRATCH_MNT/src $SCRATCH_MNT/src.clone2
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snap_src_sz=`ls -lah $SCRATCH_MNT/src.clone1 | awk '{print $5}'`
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echo "attempting ioctl (src.clone1 src)"
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$CLONER_PROG -s 0 -d 0 -l ${snap_src_sz} \
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$SCRATCH_MNT/src.clone1 $SCRATCH_MNT/src
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# The clone operation should have failed. If it did not it meant we had data
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# loss, because file "src.clone1" has an inline extent which is 10 bytes long
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# while file "src" has an inline extent which is 20 bytes long. The clone
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# operation would remove the inline extent of "src" and then copy the inline
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# extent from "src.clone1" into "src", which means we would lose the last 10
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# bytes of data from "src" (on read we would get 0x00 as the value for any
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# of those 10 bytes, because the file's size remains as 20 bytes).
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echo "File src data after attempt to clone from src.clone1 into src:"
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od -t x1 $SCRATCH_MNT/src
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snap_src_sz=`ls -lah $SCRATCH_MNT/src.clone2 | awk '{print $5}'`
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echo "attempting ioctl (src.clone2 src)"
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$CLONER_PROG -s 0 -d 0 -l ${snap_src_sz} \
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$SCRATCH_MNT/src.clone2 $SCRATCH_MNT/src
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# The clone operation should have succeeded.
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echo "File src data after attempt to clone from src.clone2 into src:"
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od -t x1 $SCRATCH_MNT/src
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status=0 ; exit
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