# get standard environment, filters and checks
. ./common/rc
. ./common/filter
+. ./common/dmdust
# remove previous $seqres.full before test
rm -f $seqres.full
# Modify as appropriate.
_supported_fs btrfs
_supported_os Linux
-_require_fail_make_request
_require_scratch_dev_pool 2
+_require_dm_target dust
_require_btrfs_command inspect-internal dump-tree
_require_command "$FILEFRAG_PROG" filefrag
-get_physical()
-{
- local logical=$1
- local stripe=$2
- $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
- grep $logical -A 6 | \
- $AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$6 }"
-}
-
-get_devid()
-{
- local logical=$1
- local stripe=$2
- $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \
- grep $logical -A 6 | \
- $AWK_PROG "(\$1 ~ /stripe/ && \$3 ~ /devid/ && \$2 ~ /$stripe/) { print \$4 }"
-}
-
-get_device_path()
-{
- local devid=$1
- echo "$SCRATCH_DEV_POOL" | $AWK_PROG "{print \$$devid}"
-}
-
-start_fail()
-{
- local sysfs_bdev="$1"
- echo 100 > $DEBUGFS_MNT/fail_make_request/probability
- echo 2 > $DEBUGFS_MNT/fail_make_request/times
- echo 1 > $DEBUGFS_MNT/fail_make_request/task-filter
- echo 0 > $DEBUGFS_MNT/fail_make_request/verbose
- echo 1 > $sysfs_bdev/make-it-fail
-}
-
-stop_fail()
-{
- local sysfs_bdev="$1"
- echo 0 > $DEBUGFS_MNT/fail_make_request/probability
- echo 0 > $DEBUGFS_MNT/fail_make_request/times
- echo 0 > $DEBUGFS_MNT/fail_make_request/task-filter
- echo 0 > $sysfs_bdev/make-it-fail
-}
-
_scratch_dev_pool_get 2
# step 1, create a raid1 btrfs which contains one 128k file.
echo "step 1......mkfs.btrfs" >>$seqres.full
${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar >> $seqres.full
logical_in_btrfs=`${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar | _filter_filefrag | cut -d '#' -f 1`
-physical=`get_physical ${logical_in_btrfs} 1`
-devid=$(get_devid ${logical_in_btrfs} 1)
-target_dev=$(get_device_path $devid)
+echo "Logical offset is $logical_in_btrfs" >>$seqres.full
+_scratch_unmount
-SYSFS_BDEV=`_sysfs_dev $target_dev`
+read -r stripe physical < <(
+$BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 "$SCRATCH_DEV" |
+ grep "$logical_in_btrfs" -A 6 |
+ $AWK_PROG '$1 == "stripe" && $3 == "devid" && $4 == 1 { print $2 " " $6; exit }')
+echo "Physical offset of stripe $stripe is $physical on devid 1" >> $seqres.full
-_scratch_unmount
-$BTRFS_UTIL_PROG ins dump-tree -t 3 $SCRATCH_DEV | \
- grep $logical_in_btrfs -A 6 >> $seqres.full
-echo "Corrupt stripe 1 devid $devid devpath $target_dev physical $physical" \
- >> $seqres.full
-$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical 64K" $target_dev > /dev/null
+$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical 64K" "$SCRATCH_DEV" > /dev/null
-_scratch_mount -o nospace_cache
+_init_dust
+_mount_dust
# step 3, 128k dio read (this read can repair bad copy)
echo "step 3......repair the bad copy" >>$seqres.full
-# since raid1 consists of two copies, and the bad copy was put on stripe #1
-# while the good copy lies on stripe #0, the bad copy only gets access when the
-start_fail $SYSFS_BDEV
-while [[ -z ${result} ]]; do
- # enable task-filter only fails the following dio read so the repair is
- # supposed to work.
- result=$(bash -c "
- if [[ \$((\$\$ % 2)) -eq 1 ]]; then
- echo 1 > /proc/\$\$/make-it-fail
- exec $XFS_IO_PROG -d -c \"pread -b 128K 0 128K\" \"$SCRATCH_MNT/foobar\"
- fi");
+$DMSETUP_PROG message dust-test 0 addbadblock $((physical / 512))
+$DMSETUP_PROG message dust-test 0 enable
+while [[ -z $( (( BASHPID % 2 == stripe )) &&
+ exec $XFS_IO_PROG -d -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar") ]]; do
+ :
done
-stop_fail $SYSFS_BDEV
-_scratch_unmount
+_cleanup_dust
# check if the repair works
-$XFS_IO_PROG -c "pread -v -b 512 $physical 512" $target_dev | \
+$XFS_IO_PROG -c "pread -v -b 512 $physical 512" "$SCRATCH_DEV" |
_filter_xfs_io_offset
_scratch_dev_pool_put