| Message ID | 1493400370-6096-1-git-send-email-bo.li.liu@oracle.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Fri, Apr 28, 2017 at 6:26 PM, Liu Bo <bo.li.liu@oracle.com> wrote: > Commit 2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks") > introduced this regression. It'd cause 'Segmentation fault' error. > > The upstream fix is > Btrfs: fix segment fault when doing dio read > > Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Just a comment below. > --- > v2: - Add 'mkfs -b 1G' to limit filesystem size to 2G in raid1 profile so that > we get a consistent output. > > tests/btrfs/142 | 189 ++++++++++++++++++++++++++++++++++++++++++++++++++++ > tests/btrfs/142.out | 39 +++++++++++ > tests/btrfs/group | 1 + > 3 files changed, 229 insertions(+) > create mode 100755 tests/btrfs/142 > create mode 100644 tests/btrfs/142.out > > diff --git a/tests/btrfs/142 b/tests/btrfs/142 > new file mode 100755 > index 0000000..94566de > --- /dev/null > +++ b/tests/btrfs/142 > @@ -0,0 +1,189 @@ > +#! /bin/bash > +# FS QA Test 142 > +# > +# Regression test for btrfs DIO read's repair during read without checksum. > +# > +# Commit 2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks") > +# introduced this regression. It'd cause 'Segmentation fault' error. > +# > +# The upstream fix is > +# Btrfs: fix segment fault when doing dio read > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2017 Liu Bo. 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 2 > + > +_require_btrfs_command inspect-internal dump-tree > +_require_command "$FILEFRAG_PROG" filefrag > + > +# helpe to convert 'file offset' to btrfs logical offset > +FILEFRAG_FILTER=' > + if (/blocks? of (\d+) bytes/) { > + $blocksize = $1; > + next > + } > + ($ext, $logical, $physical, $length) = > + (/^\s*(\d+):\s+(\d+)..\s+\d+:\s+(\d+)..\s+\d+:\s+(\d+):/) > + or next; > + ($flags) = /.*:\s*(\S*)$/; > + print $physical * $blocksize, "#", > + $length * $blocksize, "#", > + $logical * $blocksize, "#", > + $flags, " "' > + > +# this makes filefrag output script readable by using a perl helper. > +# output is one extent per line, with three numbers separated by '#' > +# the numbers are: physical, length, logical (all in bytes) > +# sample output: "1234#10#5678" -> physical 1234, length 10, logical 5678 > +_filter_extents() > +{ > + tee -a $seqres.full | $PERL_PROG -ne "$FILEFRAG_FILTER" > +} > + > +_check_file_extents() > +{ > + cmd="filefrag -v $1" > + echo "# $cmd" >> $seqres.full > + out=`$cmd | _filter_extents` > + if [ -z "$out" ]; then > + return 1 > + fi > + echo "after filter: $out" >> $seqres.full > + echo $out > + return 0 > +} > + > +_check_repair() > +{ > + filter=${1:-cat} > + dmesg | tac | sed -ne "0,\#run fstests $seqnum at $date_time#p" | tac | $filter | grep -q -e "direct IO failed" > + if [ $? -eq 0 ]; then > + echo 1 > + else > + echo 0 > + fi > +} > + > +_get_physical() > +{ > + # $1 is logical address > + # print chunk tree and find devid 2 which is $SCRATCH_DEV > + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }' > +} > + > + > +SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV` > + > +start_fail() > +{ > + echo 100 > $DEBUGFS_MNT/fail_make_request/probability > + echo 1 > $DEBUGFS_MNT/fail_make_request/times > + echo 0 > $DEBUGFS_MNT/fail_make_request/verbose > + echo 1 > $SYSFS_BDEV/make-it-fail > +} > + > +stop_fail() > +{ > + echo 0 > $DEBUGFS_MNT/fail_make_request/probability > + echo 0 > $DEBUGFS_MNT/fail_make_request/times > + 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 > + > +mkfs_opts="-d raid1 -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,nodatasum > + > +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" | _filter_xfs_io > + > +sync The sync is not necessary, since we cleanly unmount the fs below. The test works now with a patched kernel and fails with an unpatched kernel as expected. Looks good to me, but FILEFRAG_FILTER, _filter_extents, _check_file_extents, _get_physical and _check_repair are duplicated across all the 4 test case files in the series. Could be factored into common/btrfs later for example. > + > +# step 2, corrupt the first 64k of one copy (on SCRATCH_DEV which is the first > +# one in $SCRATCH_DEV_POOL > +echo "step 2......corrupt file extent" >>$seqres.full > + > +extents=`_check_file_extents $SCRATCH_MNT/foobar` > +logical_in_btrfs=`echo ${extents} | cut -d '#' -f 1` > +physical_on_scratch=`_get_physical ${logical_in_btrfs}` > + > +_scratch_unmount > +$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV | _filter_xfs_io > + > +_scratch_mount -o nospace_cache,nodatasum > + > +# 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 following read may read the good > +# copy directly, so lets loop 10 times here and discard output that dio reads > +# give > +for i in `seq 1 10`; do > + # start_fail only fails the following dio read so the repair is > + # supposed to work. > + start_fail > + $XFS_IO_PROG -d -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null > + stop_fail > + repair=`_check_repair` > + if [ $repair -eq 1 ]; then > + break > + fi > +done > + > +_scratch_unmount > + > +# check if the repair works > +$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV | _filter_xfs_io > + > +_scratch_dev_pool_put > +# success, all done > +status=0 > +exit > diff --git a/tests/btrfs/142.out b/tests/btrfs/142.out > new file mode 100644 > index 0000000..d8be7fb > --- /dev/null > +++ b/tests/btrfs/142.out > @@ -0,0 +1,39 @@ > +QA output created by 142 > +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 136708096 > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > +08260000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260010: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260020: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260030: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260040: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260050: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260060: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260070: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260080: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260090: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082600a0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082600b0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082600c0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082600d0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082600e0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082600f0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260100: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260110: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260120: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260130: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260140: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260150: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260160: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260170: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260180: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +08260190: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082601a0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082601b0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082601c0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082601d0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082601e0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +082601f0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ > +read 512/512 bytes at offset 136708096 > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > diff --git a/tests/btrfs/group b/tests/btrfs/group > index 7b380e5..a4f97cd 100644 > --- a/tests/btrfs/group > +++ b/tests/btrfs/group > @@ -143,3 +143,4 @@ > 139 auto qgroup > 140 auto quick > 141 auto quick > +142 auto quick > -- > 2.5.0 >
diff --git a/tests/btrfs/142 b/tests/btrfs/142 new file mode 100755 index 0000000..94566de --- /dev/null +++ b/tests/btrfs/142 @@ -0,0 +1,189 @@ +#! /bin/bash +# FS QA Test 142 +# +# Regression test for btrfs DIO read's repair during read without checksum. +# +# Commit 2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks") +# introduced this regression. It'd cause 'Segmentation fault' error. +# +# The upstream fix is +# Btrfs: fix segment fault when doing dio read +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Liu Bo. 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 $seqres.full + +# real QA test starts here + +# Modify as appropriate. +_supported_fs btrfs +_supported_os Linux +_require_scratch_dev_pool 2 + +_require_btrfs_command inspect-internal dump-tree +_require_command "$FILEFRAG_PROG" filefrag + +# helpe to convert 'file offset' to btrfs logical offset +FILEFRAG_FILTER=' + if (/blocks? of (\d+) bytes/) { + $blocksize = $1; + next + } + ($ext, $logical, $physical, $length) = + (/^\s*(\d+):\s+(\d+)..\s+\d+:\s+(\d+)..\s+\d+:\s+(\d+):/) + or next; + ($flags) = /.*:\s*(\S*)$/; + print $physical * $blocksize, "#", + $length * $blocksize, "#", + $logical * $blocksize, "#", + $flags, " "' + +# this makes filefrag output script readable by using a perl helper. +# output is one extent per line, with three numbers separated by '#' +# the numbers are: physical, length, logical (all in bytes) +# sample output: "1234#10#5678" -> physical 1234, length 10, logical 5678 +_filter_extents() +{ + tee -a $seqres.full | $PERL_PROG -ne "$FILEFRAG_FILTER" +} + +_check_file_extents() +{ + cmd="filefrag -v $1" + echo "# $cmd" >> $seqres.full + out=`$cmd | _filter_extents` + if [ -z "$out" ]; then + return 1 + fi + echo "after filter: $out" >> $seqres.full + echo $out + return 0 +} + +_check_repair() +{ + filter=${1:-cat} + dmesg | tac | sed -ne "0,\#run fstests $seqnum at $date_time#p" | tac | $filter | grep -q -e "direct IO failed" + if [ $? -eq 0 ]; then + echo 1 + else + echo 0 + fi +} + +_get_physical() +{ + # $1 is logical address + # print chunk tree and find devid 2 which is $SCRATCH_DEV + $BTRFS_UTIL_PROG inspect-internal dump-tree -t 3 $SCRATCH_DEV | grep $1 -A 6 | awk '($1 ~ /stripe/ && $3 ~ /devid/ && $4 ~ /1/) { print $6 }' +} + + +SYSFS_BDEV=`_sysfs_dev $SCRATCH_DEV` + +start_fail() +{ + echo 100 > $DEBUGFS_MNT/fail_make_request/probability + echo 1 > $DEBUGFS_MNT/fail_make_request/times + echo 0 > $DEBUGFS_MNT/fail_make_request/verbose + echo 1 > $SYSFS_BDEV/make-it-fail +} + +stop_fail() +{ + echo 0 > $DEBUGFS_MNT/fail_make_request/probability + echo 0 > $DEBUGFS_MNT/fail_make_request/times + 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 + +mkfs_opts="-d raid1 -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,nodatasum + +$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" | _filter_xfs_io + +sync + +# step 2, corrupt the first 64k of one copy (on SCRATCH_DEV which is the first +# one in $SCRATCH_DEV_POOL +echo "step 2......corrupt file extent" >>$seqres.full + +extents=`_check_file_extents $SCRATCH_MNT/foobar` +logical_in_btrfs=`echo ${extents} | cut -d '#' -f 1` +physical_on_scratch=`_get_physical ${logical_in_btrfs}` + +_scratch_unmount +$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $physical_on_scratch 64K" $SCRATCH_DEV | _filter_xfs_io + +_scratch_mount -o nospace_cache,nodatasum + +# step 3, 128k dio read (this read can repair bad copy) +echo "step 3......repair the bad copy" >>$seqres.full + +# since raid1 consists of two copies, and the following read may read the good +# copy directly, so lets loop 10 times here and discard output that dio reads +# give +for i in `seq 1 10`; do + # start_fail only fails the following dio read so the repair is + # supposed to work. + start_fail + $XFS_IO_PROG -d -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null + stop_fail + repair=`_check_repair` + if [ $repair -eq 1 ]; then + break + fi +done + +_scratch_unmount + +# check if the repair works +$XFS_IO_PROG -c "pread -v -b 512 $physical_on_scratch 512" $SCRATCH_DEV | _filter_xfs_io + +_scratch_dev_pool_put +# success, all done +status=0 +exit diff --git a/tests/btrfs/142.out b/tests/btrfs/142.out new file mode 100644 index 0000000..d8be7fb --- /dev/null +++ b/tests/btrfs/142.out @@ -0,0 +1,39 @@ +QA output created by 142 +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 136708096 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +08260000: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260010: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260020: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260030: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260040: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260050: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260060: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260070: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260080: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260090: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082600a0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082600b0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082600c0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082600d0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082600e0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082600f0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260100: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260110: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260120: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260130: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260140: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260150: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260160: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260170: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260180: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +08260190: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082601a0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082601b0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082601c0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082601d0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082601e0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +082601f0: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................ +read 512/512 bytes at offset 136708096 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) diff --git a/tests/btrfs/group b/tests/btrfs/group index 7b380e5..a4f97cd 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -143,3 +143,4 @@ 139 auto qgroup 140 auto quick 141 auto quick +142 auto quick
Commit 2dabb3248453 ("Btrfs: Direct I/O read: Work on sectorsized blocks") introduced this regression. It'd cause 'Segmentation fault' error. The upstream fix is Btrfs: fix segment fault when doing dio read Signed-off-by: Liu Bo <bo.li.liu@oracle.com> --- v2: - Add 'mkfs -b 1G' to limit filesystem size to 2G in raid1 profile so that we get a consistent output. tests/btrfs/142 | 189 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/142.out | 39 +++++++++++ tests/btrfs/group | 1 + 3 files changed, 229 insertions(+) create mode 100755 tests/btrfs/142 create mode 100644 tests/btrfs/142.out