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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>
93 lines
2.5 KiB
Bash
Executable File
93 lines
2.5 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2014 Filipe Manana. All Rights Reserved.
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#
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# FS QA Test No. btrfs/050
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#
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# Regression for btrfs send when an inode only has extended references
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# associated to it (no regular references present). This used to cause
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# incorrect access to a b+tree leaf, where an extended reference item
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# was accessed as if it were a regular reference item, causing unexpected
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# and unpredictable behaviour such as producing a random/weird path string
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# or a crash.
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#
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# This issue is fixed by the following linux kernel btrfs patch:
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#
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# Btrfs: send, fix incorrect ref access when using extrefs
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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 -fr $send_files_dir
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rm -fr $tmp
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch
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_require_fssum
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send_files_dir=$TEST_DIR/btrfs-test-$seq
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rm -f $seqres.full
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rm -fr $send_files_dir
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mkdir $send_files_dir
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_scratch_mkfs "-O extref" >/dev/null 2>&1
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_scratch_mount
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# 2550 hard links is enough to cause creation of extended references
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# even if the leaf/node size is 64Kb (largest possible).
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NUM_LINKS=2550
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TEST_PATH=$SCRATCH_MNT/home/john/files/series/qwerty
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mkdir -p $TEST_PATH
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touch $TEST_PATH/foobar
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# Create a bunch of hard links for the file, such that at least one
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# inode extended reference item is created.
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for i in `seq 1 $NUM_LINKS`; do
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ln $TEST_PATH/foobar $TEST_PATH/foobar_link_`printf "%04d" $i`
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done
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# The only link we'll have alive at the end.
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ln $TEST_PATH/foobar $TEST_PATH/final_foobar_name
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# Now delete all previous hard links (except the last one). This will
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# remove the regular inode reference item from the b+tree, and will
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# leave only an inode extended reference item, which is the condition
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# necessary to trigger the bug.
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rm -f $TEST_PATH/foobar
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for i in `seq 1 $NUM_LINKS`; do
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rm -f $TEST_PATH/foobar_link_`printf "%04d" $i`
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done
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_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
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run_check $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
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_run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
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_scratch_unmount
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_check_scratch_fs
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_scratch_mkfs >/dev/null 2>&1
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_scratch_mount
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_run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT
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run_check $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
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status=0
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exit
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