mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
btrfs/14[23]: Use proper help to get both devid and physical offset for corruption.
[BUG]
When using btrfs-progs v5.4, btrfs/142 and btrfs/143 will fail:
btrfs/142 1s ... - output mismatch (see xfstests/results//btrfs/142.out.bad)
--- tests/btrfs/142.out 2018-09-16 21:30:48.505104287 +0100
+++ xfstests/results//btrfs/142.out.bad
2019-12-10 15:35:40.280392626 +0000
@@ -3,37 +3,37 @@
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
...
(Run 'diff -u xfstests/tests/btrfs/142.out xfstests/results//btrfs/142.out.bad' to see the entire diff)
[CAUSE]
Btrfs/14[23] test whether a read on corrupted stripe will re-silver
itself.
Such test by its nature will need to modify on-disk data, thus need to
get the btrfs logical -> physical mapping, which is done by near
hard-coded lookup function, which rely on certain stripe:devid sequence.
Recent btrfs-progs commit c501c9e3b816 ("btrfs-progs: mkfs: match devid
order to the stripe index") changes how we use devices in mkfs.btrfs,
this caused a change in chunk layout, and break the hard-coded
stripe:devid sequence.
[FIX]
This patch will do full devid and physical offset lookup, instead of old
physical offset only lookup.
The only assumption made is, mkfs.btrfs assigns devid sequentially for
its devices.
Which means, for "mkfs.btrfs $dev1 $dev2 $dev3", we get devid 1 for $dev1,
devid 2 for $dev2, and so on.
This change will allow btrfs/14[23] to handle even future chunk layout
change. (Although I hope this will never happen again).
This also addes extra debug output (although less than 10 lines) into
$seqres.full, just in case when layout changes and current lookup can't
handle it, developer can still pindown the problem easily.
Reported-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Qu Wenruo
Eryu Guan
+36
-16
@@ -47,30 +47,45 @@ _require_command "$FILEFRAG_PROG" filefrag
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get_physical()
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{
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# $1 is logical address
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# print chunk tree and find devid 2 which is $SCRATCH_DEV
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }'
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local logical=$1
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local stripe=$2
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical -A 6 | \
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$AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$6 }"
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}
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get_devid()
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{
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local logical=$1
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local stripe=$2
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical -A 6 | \
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$AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$4 }"
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}
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SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV`
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get_device_path()
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{
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local devid=$1
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echo "$SCRATCH_DEV_POOL" | $AWK_PROG "{print \$$devid}"
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}
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start_fail()
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{
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local sysfs_bdev="$1"
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echo 100 > $DEBUGFS_MNT/fail_make_request/probability
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echo 2 > $DEBUGFS_MNT/fail_make_request/times
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echo 1 > $DEBUGFS_MNT/fail_make_request/task-filter
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echo 0 > $DEBUGFS_MNT/fail_make_request/verbose
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echo 1 > $SYSFS_BDEV/make-it-fail
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echo 1 > $sysfs_bdev/make-it-fail
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}
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stop_fail()
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{
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local sysfs_bdev="$1"
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echo 0 > $DEBUGFS_MNT/fail_make_request/probability
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echo 0 > $DEBUGFS_MNT/fail_make_request/times
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echo 0 > $DEBUGFS_MNT/fail_make_request/task-filter
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echo 0 > $SYSFS_BDEV/make-it-fail
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echo 0 > $sysfs_bdev/make-it-fail
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}
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_scratch_dev_pool_get 2
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@@ -87,17 +102,23 @@ _scratch_mount -o nospace_cache,nodatasum
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$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 one copy (on SCRATCH_DEV which is the first
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# one in $SCRATCH_DEV_POOL
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# step 2, corrupt the first 64k of stripe #1
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echo "step 2......corrupt file extent" >>$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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physical_on_scratch=`get_physical ${logical_in_btrfs}`
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physical=`get_physical ${logical_in_btrfs} 1`
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devid=$(get_devid ${logical_in_btrfs} 1)
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target_dev=$(get_device_path $devid)
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SYSFS_BDEV=`_sysfs_dev $target_dev`
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_scratch_unmount
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV |\
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_filter_xfs_io_offset
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$BTRFS_UTIL_PROG ins dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical_in_btrfs -A 6 >> $seqres.full
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echo "Corrupt stripe 1 devid $devid devpath $target_dev physical $physical" \
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>> $seqres.full
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical 64K" $target_dev > /dev/null
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_scratch_mount -o nospace_cache
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@@ -106,8 +127,7 @@ echo "step 3......repair the bad copy" >>$seqres.full
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# since raid1 consists of two copies, and the bad copy was put on stripe #1
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# while the good copy lies on stripe #0, the bad copy only gets access when the
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# reader's pid % 2 == 1 is true
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start_fail
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start_fail $SYSFS_BDEV
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while [[ -z ${result} ]]; do
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# enable task-filter only fails the following dio read so the repair is
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# supposed to work.
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@@ -117,12 +137,12 @@ while [[ -z ${result} ]]; do
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exec $XFS_IO_PROG -d -c \"pread -b 128K 0 128K\" \"$SCRATCH_MNT/foobar\"
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fi");
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done
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stop_fail
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stop_fail $SYSFS_BDEV
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_scratch_unmount
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# check if the repair works
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$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV |\
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$XFS_IO_PROG -c "pread -v -b 512 $physical 512" $target_dev | \
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_filter_xfs_io_offset
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_scratch_dev_pool_put
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@@ -1,8 +1,6 @@
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QA output created by 142
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wrote 131072/131072 bytes
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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+36
-14
@@ -54,30 +54,48 @@ _require_command "$FILEFRAG_PROG" filefrag
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get_physical()
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{
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# $1 is logical address
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# print chunk tree and find devid 2 which is $SCRATCH_DEV
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }'
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local logical=$1
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local stripe=$2
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical -A 6 | \
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$AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$6 }"
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}
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get_devid()
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{
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local logical=$1
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local stripe=$2
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$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
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grep $logical -A 6 | \
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$AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$4 }"
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}
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get_device_path()
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{
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local devid=$1
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echo "$SCRATCH_DEV_POOL" | $AWK_PROG "{print \$$devid}"
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}
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SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV`
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start_fail()
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{
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local sysfs_bdev="$1"
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echo 100 > $DEBUGFS_MNT/fail_make_request/probability
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# the 1st one fails the first bio which is reading 4k (or more due to
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# readahead), and the 2nd one fails the retry of validation so that it
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# triggers read-repair
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echo 2 > $DEBUGFS_MNT/fail_make_request/times
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echo 0 > $DEBUGFS_MNT/fail_make_request/verbose
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echo 1 > $SYSFS_BDEV/make-it-fail
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echo 1 > $sysfs_bdev/make-it-fail
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}
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stop_fail()
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{
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local sysfs_bdev="$1"
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echo 0 > $DEBUGFS_MNT/fail_make_request/probability
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echo 0 > $DEBUGFS_MNT/fail_make_request/times
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echo 0 > $SYSFS_BDEV/make-it-fail
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echo 0 > $sysfs_bdev/make-it-fail
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}
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_scratch_dev_pool_get 2
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@@ -94,17 +112,21 @@ _scratch_mount -o nospace_cache,nodatasum
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$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 one copy (on SCRATCH_DEV which is the first
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# one in $SCRATCH_DEV_POOL
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# step 2, corrupt the first 64k of stripe #1
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echo "step 2......corrupt file extent" >>$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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physical_on_scratch=`get_physical ${logical_in_btrfs}`
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physical=`get_physical ${logical_in_btrfs} 1`
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devid=$(get_devid ${logical_in_btrfs} 1)
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target_dev=$(get_device_path $devid)
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SYSFS_BDEV=`_sysfs_dev $target_dev`
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_scratch_unmount
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV |\
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_filter_xfs_io_offset
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echo "corrupt stripe 1 devid $devid devpath $target_dev physical $physical" \
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>> $seqres.full
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$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical 64K" $target_dev > /dev/null
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_scratch_mount -o nospace_cache
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@@ -118,18 +140,18 @@ while [[ -z ${result} ]]; do
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# invalidate the page cache.
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_scratch_cycle_mount
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start_fail
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start_fail $SYSFS_BDEV
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result=$(bash -c "
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if [[ \$((\$\$ % 2)) -eq 1 ]]; then
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exec $XFS_IO_PROG -c \"pread 0 4K\" \"$SCRATCH_MNT/foobar\"
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fi");
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stop_fail
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stop_fail $SYSFS_BDEV
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done
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_scratch_unmount
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# check if the repair works
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$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV |\
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$XFS_IO_PROG -c "pread -v -b 512 $physical 512" $target_dev |\
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_filter_xfs_io_offset
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_scratch_dev_pool_put
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@@ -1,8 +1,6 @@
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QA output created by 143
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wrote 131072/131072 bytes
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
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