mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Omar Sandoval
e2e468d4dd
These two tests test direct I/O and buffered read repair, respectively, with fail_make_request. However, by using "fail_make_request/times", they rely on repair having a specific I/O pattern. My pending Btrfs direct I/O refactoring patch series changes this I/O pattern and thus breaks this test. The dm-dust target (added in v5.2) emulates a device with bad blocks that are fixed when written to (like a device that remaps bad blocks). This is exactly what we want for testing repair. Add some common dm-dust helpers and update the tests to use dm-dust. Signed-off-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
102 lines
2.7 KiB
Bash
Executable File
102 lines
2.7 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017 Liu Bo. All Rights Reserved.
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#
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# FS QA Test 142
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#
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# Regression test for btrfs DIO read's repair during read without checksum.
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#
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# Commit 2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks")
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# introduced this regression. It'd cause 'Segmentation fault' error.
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#
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# The upstream fix is
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# commit 97bf5a5589aa ("Btrfs: fix segmentation fault when doing dio read")
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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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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/dmdust
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch_dev_pool 2
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_require_dm_target dust
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_require_btrfs_command inspect-internal dump-tree
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_require_command "$FILEFRAG_PROG" filefrag
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_scratch_dev_pool_get 2
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# step 1, create a raid1 btrfs which contains one 128k file.
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echo "step 1......mkfs.btrfs" >>$seqres.full
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mkfs_opts="-d raid1 -b 1G"
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_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
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# -o nospace_cache makes sure data is written to the start position of the data
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# chunk
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_scratch_mount -o nospace_cache,nodatasum
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$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
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_filter_xfs_io_offset
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# step 2, corrupt the first 64k of stripe #1
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echo "step 2......corrupt file extent" >>$seqres.full
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${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar >> $seqres.full
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logical_in_btrfs=`${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar | _filter_filefrag | cut -d '#' -f 1`
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echo "Logical offset is $logical_in_btrfs" >>$seqres.full
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_scratch_unmount
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read -r stripe physical < <(
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 "$SCRATCH_DEV" |
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grep "$logical_in_btrfs" -A 6 |
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$AWK_PROG '$1 == "stripe" && $3 == "devid" && $4 == 1 { print $2 " " $6; exit }')
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echo "Physical offset of stripe $stripe is $physical on devid 1" >> $seqres.full
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical 64K" "$SCRATCH_DEV" > /dev/null
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_init_dust
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_mount_dust
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# step 3, 128k dio read (this read can repair bad copy)
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echo "step 3......repair the bad copy" >>$seqres.full
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$DMSETUP_PROG message dust-test 0 addbadblock $((physical / 512))
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$DMSETUP_PROG message dust-test 0 enable
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while [[ -z $( (( BASHPID % 2 == stripe )) &&
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exec $XFS_IO_PROG -d -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar") ]]; do
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:
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done
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_cleanup_dust
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# check if the repair works
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$XFS_IO_PROG -c "pread -v -b 512 $physical 512" "$SCRATCH_DEV" |
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_filter_xfs_io_offset
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_scratch_dev_pool_put
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# success, all done
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status=0
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exit
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