| Message ID | 20180102203500.12713-1-bo.li.liu@oracle.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jan 02, 2018 at 01:35:00PM -0700, Liu Bo wrote: > This is to reproduce a bug of scrub, with which scrub is unable to > repair raid6 corruption as expected. > > The kernel side fixes are > Btrfs: make raid6 rebuild retry more > Btrfs: fix scrub to repair raid6 corruption > > Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Looks fine overall, I tested it with 4.15-rc6 kernel and test failed as expected, re-tested successfully after applying the patches mentioned in commit log. Just some really minor issues below, and I can fix them on commit if what I suggest looks sane to you. > --- > tests/btrfs/158 | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++ > tests/btrfs/158.out | 10 +++++ > tests/btrfs/group | 1 + > 3 files changed, 125 insertions(+) > create mode 100755 tests/btrfs/158 > create mode 100644 tests/btrfs/158.out > > diff --git a/tests/btrfs/158 b/tests/btrfs/158 > new file mode 100755 > index 0000000..43afc2d > --- /dev/null > +++ b/tests/btrfs/158 > @@ -0,0 +1,114 @@ > +#! /bin/bash > +# FS QA Test 158 > +# > +# The test case is check if scrub is able fix raid6 data corruption, > +# ie. if there is data corruption on two disks in the same horizontal > +# stripe, e.g. due to bitrot. > +# > +# The kernel fixes are > +# Btrfs: make raid6 rebuild retry more > +# Btrfs: fix scrub to repair raid6 corruption > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2017 Oracle. All Rights Reserved. ^^^^ 2018? > +# > +# This program is free software; you can redistribute it and/or > +# modify it under the terms of the GNU General Public License as > +# published by the Free Software Foundation. > +# > +# This program is distributed in the hope that it would be useful, > +# but WITHOUT ANY WARRANTY; without even the implied warranty of > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > +# GNU General Public License for more details. > +# > +# You should have received a copy of the GNU General Public License > +# along with this program; if not, write the Free Software Foundation, > +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > +#----------------------------------------------------------------------- > +# > + > +seq=`basename $0` > +seqres=$RESULT_DIR/$seq > +echo "QA output created by $seq" > + > +here=`pwd` > +tmp=/tmp/$$ > +status=1 # failure is the default! > +trap "_cleanup; exit \$status" 0 1 2 3 15 > + > +_cleanup() > +{ > + cd / > + rm -f $tmp.* > +} > + > +# get standard environment, filters and checks > +. ./common/rc > +. ./common/filter > + > +# remove previous $seqres.full before test > +rm -f $seqres.full > + > +# real QA test starts here > + > +# Modify as appropriate. > +_supported_fs btrfs > +_supported_os Linux > +_require_scratch_dev_pool 4 > +_require_btrfs_command inspect-internal dump-tree > + > +get_physical_stripe0() > +{ > + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ > + grep " DATA\|RAID6" -A 10 | \ > + $AWK_PROG '($1 ~ /stripe/ && $3 ~ /devid/ && $2 ~ /0/) { print $6 }' > +} > + > +get_physical_stripe1() > +{ > + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ > + grep " DATA\|RAID6" -A 10 | \ > + $AWK_PROG '($1 ~ /stripe/ && $3 ~ /devid/ && $2 ~ /1/) { print $6 }' > +} > + > +_scratch_dev_pool_get 4 > +# step 1: create a raid6 btrfs and create a 4K file > +echo "step 1......mkfs.btrfs" >>$seqres.full > + > +mkfs_opts="-d raid6 -b 1G" > +_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1 > + > +# -o nospace_cache makes sure data is written to the start position of the data > +# chunk > +_scratch_mount -o nospace_cache > + > +# [0,64K) is written to stripe 0 and [64K, 128K) is written to stripe 1 > +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa 0 128K" -c "fsync" \ > + "$SCRATCH_MNT/foobar" | _filter_xfs_io > + > +_scratch_unmount > + > +stripe_0=`get_physical_stripe0` > +stripe_1=`get_physical_stripe1` > +dev4=`echo $SCRATCH_DEV_POOL | awk '{print $4}'` > +dev3=`echo $SCRATCH_DEV_POOL | awk '{print $3}'` > + > +# step 2: corrupt the 1st and 2nd stripe (stripe 0 and 1) > +echo "step 2......simulate bitrot at offset $stripe_0 of device_4($dev4) and offset $stripe_1 of device_3($dev3)" >>$seqres.full > + > +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_0 64K" $dev4 | _filter_xfs_io > +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_1 64K" $dev3 | _filter_xfs_io > + > +# step 3: read foobar to repair the bitrot Comment meant to be "scrub to repair the bitrot"? > +echo "step 3......repair the bitrot" >> $seqres.full > +_scratch_mount -o nospace_cache > + > +btrfs scrub start -B $SCRATCH_MNT >> $seqres.full 2>&1 $BTRFS_UTIL_PROG ... > + > +od -x $SCRATCH_MNT/foobar > + > +_scratch_dev_pool_put > + > +# success, all done > +status=0 > +exit > diff --git a/tests/btrfs/158.out b/tests/btrfs/158.out > new file mode 100644 > index 0000000..1f5ad3f > --- /dev/null > +++ b/tests/btrfs/158.out > @@ -0,0 +1,10 @@ > +QA output created by 158 > +wrote 131072/131072 bytes at offset 0 > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > +wrote 65536/65536 bytes at offset 9437184 > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > +wrote 65536/65536 bytes at offset 9437184 > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > +0000000 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa > +* > +0400000 > diff --git a/tests/btrfs/group b/tests/btrfs/group > index f68abf4..0b3cf12 100644 > --- a/tests/btrfs/group > +++ b/tests/btrfs/group > @@ -160,3 +160,4 @@ > 155 auto quick send > 156 auto quick trim > 157 auto quick raid > +158 auto quick raid Should be in 'scrub' group too. Thanks, Eryu -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, Jan 04, 2018 at 05:05:34PM +0800, Eryu Guan wrote: > On Tue, Jan 02, 2018 at 01:35:00PM -0700, Liu Bo wrote: > > This is to reproduce a bug of scrub, with which scrub is unable to > > repair raid6 corruption as expected. > > > > The kernel side fixes are > > Btrfs: make raid6 rebuild retry more > > Btrfs: fix scrub to repair raid6 corruption > > > > Signed-off-by: Liu Bo <bo.li.liu@oracle.com> > > Looks fine overall, I tested it with 4.15-rc6 kernel and test failed as > expected, re-tested successfully after applying the patches mentioned in > commit log. > Thanks for testing it. > Just some really minor issues below, and I can fix them on commit if > what I suggest looks sane to you. > They all look good to me, thanks a lot for the comments. > > --- > > tests/btrfs/158 | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++ > > tests/btrfs/158.out | 10 +++++ > > tests/btrfs/group | 1 + > > 3 files changed, 125 insertions(+) > > create mode 100755 tests/btrfs/158 > > create mode 100644 tests/btrfs/158.out > > > > diff --git a/tests/btrfs/158 b/tests/btrfs/158 > > new file mode 100755 > > index 0000000..43afc2d > > --- /dev/null > > +++ b/tests/btrfs/158 > > @@ -0,0 +1,114 @@ > > +#! /bin/bash > > +# FS QA Test 158 > > +# > > +# The test case is check if scrub is able fix raid6 data corruption, > > +# ie. if there is data corruption on two disks in the same horizontal > > +# stripe, e.g. due to bitrot. > > +# > > +# The kernel fixes are > > +# Btrfs: make raid6 rebuild retry more > > +# Btrfs: fix scrub to repair raid6 corruption > > +# > > +#----------------------------------------------------------------------- > > +# Copyright (c) 2017 Oracle. All Rights Reserved. > ^^^^ 2018? oops, it was 2017 when I made the test. > > +# > > +# This program is free software; you can redistribute it and/or > > +# modify it under the terms of the GNU General Public License as > > +# published by the Free Software Foundation. > > +# > > +# This program is distributed in the hope that it would be useful, > > +# but WITHOUT ANY WARRANTY; without even the implied warranty of > > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > > +# GNU General Public License for more details. > > +# > > +# You should have received a copy of the GNU General Public License > > +# along with this program; if not, write the Free Software Foundation, > > +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > > +#----------------------------------------------------------------------- > > +# > > + > > +seq=`basename $0` > > +seqres=$RESULT_DIR/$seq > > +echo "QA output created by $seq" > > + > > +here=`pwd` > > +tmp=/tmp/$$ > > +status=1 # failure is the default! > > +trap "_cleanup; exit \$status" 0 1 2 3 15 > > + > > +_cleanup() > > +{ > > + cd / > > + rm -f $tmp.* > > +} > > + > > +# get standard environment, filters and checks > > +. ./common/rc > > +. ./common/filter > > + > > +# remove previous $seqres.full before test > > +rm -f $seqres.full > > + > > +# real QA test starts here > > + > > +# Modify as appropriate. > > +_supported_fs btrfs > > +_supported_os Linux > > +_require_scratch_dev_pool 4 > > +_require_btrfs_command inspect-internal dump-tree > > + > > +get_physical_stripe0() > > +{ > > + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ > > + grep " DATA\|RAID6" -A 10 | \ > > + $AWK_PROG '($1 ~ /stripe/ && $3 ~ /devid/ && $2 ~ /0/) { print $6 }' > > +} > > + > > +get_physical_stripe1() > > +{ > > + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ > > + grep " DATA\|RAID6" -A 10 | \ > > + $AWK_PROG '($1 ~ /stripe/ && $3 ~ /devid/ && $2 ~ /1/) { print $6 }' > > +} > > + > > +_scratch_dev_pool_get 4 > > +# step 1: create a raid6 btrfs and create a 4K file > > +echo "step 1......mkfs.btrfs" >>$seqres.full > > + > > +mkfs_opts="-d raid6 -b 1G" > > +_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1 > > + > > +# -o nospace_cache makes sure data is written to the start position of the data > > +# chunk > > +_scratch_mount -o nospace_cache > > + > > +# [0,64K) is written to stripe 0 and [64K, 128K) is written to stripe 1 > > +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa 0 128K" -c "fsync" \ > > + "$SCRATCH_MNT/foobar" | _filter_xfs_io > > + > > +_scratch_unmount > > + > > +stripe_0=`get_physical_stripe0` > > +stripe_1=`get_physical_stripe1` > > +dev4=`echo $SCRATCH_DEV_POOL | awk '{print $4}'` > > +dev3=`echo $SCRATCH_DEV_POOL | awk '{print $3}'` > > + > > +# step 2: corrupt the 1st and 2nd stripe (stripe 0 and 1) > > +echo "step 2......simulate bitrot at offset $stripe_0 of device_4($dev4) and offset $stripe_1 of device_3($dev3)" >>$seqres.full > > + > > +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_0 64K" $dev4 | _filter_xfs_io > > +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_1 64K" $dev3 | _filter_xfs_io > > + > > +# step 3: read foobar to repair the bitrot > > Comment meant to be "scrub to repair the bitrot"? > > > +echo "step 3......repair the bitrot" >> $seqres.full > > +_scratch_mount -o nospace_cache > > + > > +btrfs scrub start -B $SCRATCH_MNT >> $seqres.full 2>&1 > > $BTRFS_UTIL_PROG ... > Ah, sorry, this was mostly copied from btrfs/157, and you're 100% right on both of the above. > > + > > +od -x $SCRATCH_MNT/foobar > > + > > +_scratch_dev_pool_put > > + > > +# success, all done > > +status=0 > > +exit > > diff --git a/tests/btrfs/158.out b/tests/btrfs/158.out > > new file mode 100644 > > index 0000000..1f5ad3f > > --- /dev/null > > +++ b/tests/btrfs/158.out > > @@ -0,0 +1,10 @@ > > +QA output created by 158 > > +wrote 131072/131072 bytes at offset 0 > > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > > +wrote 65536/65536 bytes at offset 9437184 > > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > > +wrote 65536/65536 bytes at offset 9437184 > > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > > +0000000 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa > > +* > > +0400000 > > diff --git a/tests/btrfs/group b/tests/btrfs/group > > index f68abf4..0b3cf12 100644 > > --- a/tests/btrfs/group > > +++ b/tests/btrfs/group > > @@ -160,3 +160,4 @@ > > 155 auto quick send > > 156 auto quick trim > > 157 auto quick raid > > +158 auto quick raid > > Should be in 'scrub' group too. > OK, good to know there is a group for scrub. thanks, -liubo -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/tests/btrfs/158 b/tests/btrfs/158 new file mode 100755 index 0000000..43afc2d --- /dev/null +++ b/tests/btrfs/158 @@ -0,0 +1,114 @@ +#! /bin/bash +# FS QA Test 158 +# +# The test case is check if scrub is able fix raid6 data corruption, +# ie. if there is data corruption on two disks in the same horizontal +# stripe, e.g. due to bitrot. +# +# The kernel fixes are +# Btrfs: make raid6 rebuild retry more +# Btrfs: fix scrub to repair raid6 corruption +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Oracle. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here + +# Modify as appropriate. +_supported_fs btrfs +_supported_os Linux +_require_scratch_dev_pool 4 +_require_btrfs_command inspect-internal dump-tree + +get_physical_stripe0() +{ + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ + grep " DATA\|RAID6" -A 10 | \ + $AWK_PROG '($1 ~ /stripe/ && $3 ~ /devid/ && $2 ~ /0/) { print $6 }' +} + +get_physical_stripe1() +{ + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | \ + grep " DATA\|RAID6" -A 10 | \ + $AWK_PROG '($1 ~ /stripe/ && $3 ~ /devid/ && $2 ~ /1/) { print $6 }' +} + +_scratch_dev_pool_get 4 +# step 1: create a raid6 btrfs and create a 4K file +echo "step 1......mkfs.btrfs" >>$seqres.full + +mkfs_opts="-d raid6 -b 1G" +_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1 + +# -o nospace_cache makes sure data is written to the start position of the data +# chunk +_scratch_mount -o nospace_cache + +# [0,64K) is written to stripe 0 and [64K, 128K) is written to stripe 1 +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa 0 128K" -c "fsync" \ + "$SCRATCH_MNT/foobar" | _filter_xfs_io + +_scratch_unmount + +stripe_0=`get_physical_stripe0` +stripe_1=`get_physical_stripe1` +dev4=`echo $SCRATCH_DEV_POOL | awk '{print $4}'` +dev3=`echo $SCRATCH_DEV_POOL | awk '{print $3}'` + +# step 2: corrupt the 1st and 2nd stripe (stripe 0 and 1) +echo "step 2......simulate bitrot at offset $stripe_0 of device_4($dev4) and offset $stripe_1 of device_3($dev3)" >>$seqres.full + +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_0 64K" $dev4 | _filter_xfs_io +$XFS_IO_PROG -f -d -c "pwrite -S 0xbb $stripe_1 64K" $dev3 | _filter_xfs_io + +# step 3: read foobar to repair the bitrot +echo "step 3......repair the bitrot" >> $seqres.full +_scratch_mount -o nospace_cache + +btrfs scrub start -B $SCRATCH_MNT >> $seqres.full 2>&1 + +od -x $SCRATCH_MNT/foobar + +_scratch_dev_pool_put + +# success, all done +status=0 +exit diff --git a/tests/btrfs/158.out b/tests/btrfs/158.out new file mode 100644 index 0000000..1f5ad3f --- /dev/null +++ b/tests/btrfs/158.out @@ -0,0 +1,10 @@ +QA output created by 158 +wrote 131072/131072 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 65536/65536 bytes at offset 9437184 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +wrote 65536/65536 bytes at offset 9437184 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +0000000 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa +* +0400000 diff --git a/tests/btrfs/group b/tests/btrfs/group index f68abf4..0b3cf12 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -160,3 +160,4 @@ 155 auto quick send 156 auto quick trim 157 auto quick raid +158 auto quick raid
This is to reproduce a bug of scrub, with which scrub is unable to repair raid6 corruption as expected. The kernel side fixes are Btrfs: make raid6 rebuild retry more Btrfs: fix scrub to repair raid6 corruption Signed-off-by: Liu Bo <bo.li.liu@oracle.com> --- tests/btrfs/158 | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/158.out | 10 +++++ tests/btrfs/group | 1 + 3 files changed, 125 insertions(+) create mode 100755 tests/btrfs/158 create mode 100644 tests/btrfs/158.out