| Message ID | 20200131043916.3170-1-anand.jain@oracle.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs: test unaligned punch hole at ENOSPC | expand |
On 2020/1/31 下午12:39, Anand Jain wrote: > Try to punch hole with unaligned size and offset when the FS is > full. Mainly holes are punched at locations which are unaligned > with the file extent boundaries when the FS is full by data. > As the punching holes at unaligned location will involve > truncating blocks instead of just dropping the extents, it shall > involve reserving data and metadata space for delalloc and so data > alloc fails as the FS is full. It's better to mention the nocow part. For COW part, the ENOSPC is still expected. As that's the main reason I failed to understand the use case. Thanks, Qu > > btrfs_punch_hole() > btrfs_truncate_block() > btrfs_check_data_free_space() <-- ENOSPC > > We don't fail punch hole if the holes are aligned with the file > extent boundaries as it shall involve just dropping the related > extents, without truncating data extent blocks. > > Link: https://patchwork.kernel.org/patch/11357415/ > Signed-off-by: Anand Jain <anand.jain@oracle.com> > Reviewed-by: Filipe Manana <fdmanana@suse.com> > Signed-off-by: Eryu Guan <guaneryu@gmail.com> > (cherry picked from commit 4c2c678cd56a81a210cb16f9f9347073e91e2fb0) > Signed-off-by: Anand Jain <anand.jain@oracle.com> > > Conflicts: > tests/btrfs/group > --- > Its decided to bring back this test case, now the problem is better understood > and the fix is available in the ML as in [Link]. > > tests/btrfs/172 | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++ > tests/btrfs/172.out | 2 ++ > tests/btrfs/group | 1 + > 3 files changed, 76 insertions(+) > create mode 100755 tests/btrfs/172 > create mode 100644 tests/btrfs/172.out > > diff --git a/tests/btrfs/172 b/tests/btrfs/172 > new file mode 100755 > index 000000000000..0dffb2dff40b > --- /dev/null > +++ b/tests/btrfs/172 > @@ -0,0 +1,73 @@ > +#! /bin/bash > +# SPDX-License-Identifier: GPL-2.0 > +# Copyright (c) 2018 Oracle. All Rights Reserved. > +# > +# FS QA Test 172 > +# > +# Test if the unaligned (by size and offset) punch hole is successful when FS > +# is at ENOSPC. > +# > +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 > +_require_xfs_io_command "fpunch" > + > +_scratch_mkfs_sized $((256 * 1024 *1024)) >> $seqres.full > + > +# max_inline ensures data is not inlined within metadata extents > +_scratch_mount "-o max_inline=0,nodatacow" > + > +cat /proc/self/mounts | grep $SCRATCH_DEV >> $seqres.full > +$BTRFS_UTIL_PROG filesystem df $SCRATCH_MNT >> $seqres.full > + > +extent_size=$(_scratch_btrfs_sectorsize) > +unalign_by=512 > +echo extent_size=$extent_size unalign_by=$unalign_by >> $seqres.full > + > +$XFS_IO_PROG -f -c "pwrite -S 0xab 0 $((extent_size * 10))" \ > + $SCRATCH_MNT/testfile >> $seqres.full > + > +echo "Fill all space available for data and all unallocated space." >> $seqres.full > +dd status=none if=/dev/zero of=$SCRATCH_MNT/filler bs=512 >> $seqres.full 2>&1 > + > +hole_offset=0 > +hole_len=$unalign_by > +$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile > + > +hole_offset=$(($extent_size + $unalign_by)) > +hole_len=$(($extent_size - $unalign_by)) > +$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile > + > +hole_offset=$(($extent_size * 2 + $unalign_by)) > +hole_len=$(($extent_size * 5)) > +$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile > + > +# success, all done > +echo "Silence is golden" > +status=0 > +exit > diff --git a/tests/btrfs/172.out b/tests/btrfs/172.out > new file mode 100644 > index 000000000000..ce2de3f0d107 > --- /dev/null > +++ b/tests/btrfs/172.out > @@ -0,0 +1,2 @@ > +QA output created by 172 > +Silence is golden > diff --git a/tests/btrfs/group b/tests/btrfs/group > index 4b64bf8b6d2f..697b6a38ea00 100644 > --- a/tests/btrfs/group > +++ b/tests/btrfs/group > @@ -174,6 +174,7 @@ > 169 auto quick send > 170 auto quick snapshot > 171 auto quick qgroup > +172 auto quick punch > 173 auto quick swap > 174 auto quick swap > 175 auto quick swap volume >
diff --git a/tests/btrfs/172 b/tests/btrfs/172 new file mode 100755 index 000000000000..0dffb2dff40b --- /dev/null +++ b/tests/btrfs/172 @@ -0,0 +1,73 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2018 Oracle. All Rights Reserved. +# +# FS QA Test 172 +# +# Test if the unaligned (by size and offset) punch hole is successful when FS +# is at ENOSPC. +# +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 +_require_xfs_io_command "fpunch" + +_scratch_mkfs_sized $((256 * 1024 *1024)) >> $seqres.full + +# max_inline ensures data is not inlined within metadata extents +_scratch_mount "-o max_inline=0,nodatacow" + +cat /proc/self/mounts | grep $SCRATCH_DEV >> $seqres.full +$BTRFS_UTIL_PROG filesystem df $SCRATCH_MNT >> $seqres.full + +extent_size=$(_scratch_btrfs_sectorsize) +unalign_by=512 +echo extent_size=$extent_size unalign_by=$unalign_by >> $seqres.full + +$XFS_IO_PROG -f -c "pwrite -S 0xab 0 $((extent_size * 10))" \ + $SCRATCH_MNT/testfile >> $seqres.full + +echo "Fill all space available for data and all unallocated space." >> $seqres.full +dd status=none if=/dev/zero of=$SCRATCH_MNT/filler bs=512 >> $seqres.full 2>&1 + +hole_offset=0 +hole_len=$unalign_by +$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile + +hole_offset=$(($extent_size + $unalign_by)) +hole_len=$(($extent_size - $unalign_by)) +$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile + +hole_offset=$(($extent_size * 2 + $unalign_by)) +hole_len=$(($extent_size * 5)) +$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile + +# success, all done +echo "Silence is golden" +status=0 +exit diff --git a/tests/btrfs/172.out b/tests/btrfs/172.out new file mode 100644 index 000000000000..ce2de3f0d107 --- /dev/null +++ b/tests/btrfs/172.out @@ -0,0 +1,2 @@ +QA output created by 172 +Silence is golden diff --git a/tests/btrfs/group b/tests/btrfs/group index 4b64bf8b6d2f..697b6a38ea00 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -174,6 +174,7 @@ 169 auto quick send 170 auto quick snapshot 171 auto quick qgroup +172 auto quick punch 173 auto quick swap 174 auto quick swap 175 auto quick swap volume