Re: [PATCH 13/17] xfs: test swapext with reflink

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Mon, Aug 08, 2016 at 04:13:59PM +0800, Eryu Guan wrote:
> On Thu, Jul 21, 2016 at 04:47:38PM -0700, Darrick J. Wong wrote:
> > Add a few tests to stress the new swapext code for reflink and rmap.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> > ---
> >  tests/xfs/873     |  107 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  tests/xfs/873.out |    6 +++
> >  tests/xfs/874     |   99 +++++++++++++++++++++++++++++++++++++++++++++++++
> >  tests/xfs/874.out |   10 +++++
> >  tests/xfs/875     |  100 ++++++++++++++++++++++++++++++++++++++++++++++++++
> >  tests/xfs/875.out |   12 ++++++
> >  tests/xfs/group   |    3 +
> >  7 files changed, 337 insertions(+)
> >  create mode 100755 tests/xfs/873
> >  create mode 100644 tests/xfs/873.out
> >  create mode 100755 tests/xfs/874
> >  create mode 100644 tests/xfs/874.out
> >  create mode 100755 tests/xfs/875
> >  create mode 100644 tests/xfs/875.out
> > 
> > 
> > diff --git a/tests/xfs/873 b/tests/xfs/873
> > new file mode 100755
> > index 0000000..a980148
> > --- /dev/null
> > +++ b/tests/xfs/873
> > @@ -0,0 +1,107 @@
> > +#! /bin/bash
> > +# FS QA Test No. 873
> > +#
> > +# See how well xfs_fsr handles "defragging" a file with a hojillion extents.
> > +#
> > +#-----------------------------------------------------------------------
> > +# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf "$tmp".*
> > +}
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +. ./common/attr
> > +. ./common/reflink
> > +
> > +# real QA test starts here
> > +_supported_os Linux
> 
> _supported_fs xfs (next two tests need this as well)
> 
> > +_require_scratch_reflink
> > +_require_cp_reflink
> > +_require_test_program "punch-alternating"
> > +test -x $XFS_FSR_PROG || _notrun "xfs_fsr not found"
> 
> This can be replaced by (applies to next two tests):
> 
> _require_command "$XFS_FSR_PROG" "xfs_fsr"

Ok, will fix both of these.

> > +
> > +rm -f "$seqres.full"
> > +
> > +echo "Format and mount"
> > +_scratch_mkfs > "$seqres.full" 2>&1
> > +_scratch_mount >> "$seqres.full" 2>&1
> > +
> > +testdir="$SCRATCH_MNT/test-$seq"
> > +mkdir "$testdir"
> > +
> > +# Setup for 16000 blocks, but we'll accept stress testing down to
> > +# 2^10 blocks... that should be plenty for anyone.
> > +fnr=$((12 + LOAD_FACTOR))
> > +free_blocks=$(stat -f -c '%a' "$testdir")
> > +blksz=$(stat -f -c '%S' "$testdir")
> > +space_avail=$((free_blocks * blksz))
> > +calc_space() {
> > +	blocks_needed=$(( 2 ** (fnr + 1) ))
> > +	space_needed=$((blocks_needed * blksz * 5 / 4))
> > +}
> > +calc_space
> > +while test $space_needed -gt $space_avail; do
> > +	fnr=$((fnr - 1))
> > +	calc_space
> > +done
> > +test $fnr -lt 10 && _notrun "Insufficient space for stress test; would only create $blocks_needed extents."
> > +bytes=$((blocks_needed * blksz))
> > +
> > +echo "Create a many-block file"
> > +echo "creating $blocks_needed blocks..." >> "$seqres.full"
> > +_pwrite_byte 0x62 0 $blksz $testdir/file0 >> $seqres.full
> > +"$XFS_IO_PROG" -f -c "pwrite -S 0x61 -b 4194304 0 $bytes" "$testdir/file1" >> "$seqres.full"
> > +echo "punching..." >> "$seqres.full"
> > +"$here/src/punch-alternating" "$testdir/file1" >> "$seqres.full"
> > +seq 0 2 $((2 ** (fnr + 1) )) | while read lblk; do
> > +	_reflink_range $testdir/file0 0 $testdir/file1 $((lblk * blksz)) $blksz >> $seqres.full
> > +done
> > +echo "...done" >> "$seqres.full"
> > +_scratch_cycle_mount
> > +
> > +echo "Reflink the big file"
> > +echo "reflinking $((blocks_needed / 2)) blocks, $((bytes / 2)) bytes" >> "$seqres.full"
> > +_reflink_range "$testdir/file1" 0 "$testdir/file2" 0 $bytes >> "$seqres.full"
> > +
> > +echo "Defrag the big file"
> > +old_nextents=$(xfs_io -c 'stat -v' $testdir/file1 | grep 'nextents' | cut -d ' ' -f 3)
> 
> There's a "_count_extents" helper, does that work for this case?

It can, though stat -v reports GETFSXATTR results, which should be faster than
_count_extents because the latter FIEMAPs the entire file and counts lines.
Seeing as XFS records the extent count in the inode, we might as well use it.

> > +$XFS_FSR_PROG -v -d $testdir/file1 >> $seqres.full
> > +new_nextents=$(xfs_io -c 'stat -v' $testdir/file1 | grep 'nextents' | cut -d ' ' -f 3)
> > +
> > +echo "Check extent count"
> > +$XFS_IO_PROG -c 'stat -v' $testdir/file1 >> $seqres.full
> > +$XFS_IO_PROG -c 'stat -v' $testdir/file2 >> $seqres.full
> > +echo "extents: $old_nextents -> $new_nextents" >> $seqres.full
> > +test $old_nextents -gt $new_nextents || echo "FAIL: $old_nextents -> $new_nextents"
> > +
> > +# success, all done
> > +status=0
> > +exit
> 
> And 873 fails the post-test fs check on "-m reflink=1,rmapbt=1" XFS,
> test passed if rmapbt=0, just FYI (tested with your djwong-experimental
> branch kernel and xfsprogs).

Yes, this should be fixed in the -wtf branches.  Sorry about that,
I should have yelled a little louder about that.  The -wtf branch is
kind of a mess, but it does have all the latest fixes and the AGF
btree block counters that will go into 4.8-rc2.

> _check_xfs_filesystem: filesystem on /dev/sda6 is inconsistent
> *** xfs_repair -n output ***
> Phase 1 - find and verify superblock...
> Phase 2 - using internal log
>         - zero log...
>         - scan filesystem freespace and inode maps...
> sb_fdblocks 3903040, counted 3903229
>         - found root inode chunk
> Phase 3 - for each AG...
>         - scan (but don't clear) agi unlinked lists...
>         - process known inodes and perform inode discovery...
>         - agno = 0
>         - agno = 1
>         - agno = 2
>         - agno = 3
>         - process newly discovered inodes...
> Phase 4 - check for duplicate blocks...
>         - setting up duplicate extent list...
>         - check for inodes claiming duplicate blocks...
>         - agno = 0
>         - agno = 1
>         - agno = 2
>         - agno = 3
> No modify flag set, skipping phase 5
> Phase 6 - check inode connectivity...
>         - traversing filesystem ...
>         - traversal finished ...
>         - moving disconnected inodes to lost+found ...
> Phase 7 - verify link counts...
> No modify flag set, skipping filesystem flush and exiting.
> *** end xfs_repair output
> 
> > diff --git a/tests/xfs/873.out b/tests/xfs/873.out
> > new file mode 100644
> > index 0000000..9dddf55
> > --- /dev/null
> > +++ b/tests/xfs/873.out
> > @@ -0,0 +1,6 @@
> > +QA output created by 873
> > +Format and mount
> > +Create a many-block file
> > +Reflink the big file
> > +Defrag the big file
> > +Check extent count
> > diff --git a/tests/xfs/874 b/tests/xfs/874
> > new file mode 100755
> > index 0000000..fb31ea8
> > --- /dev/null
> > +++ b/tests/xfs/874
> > @@ -0,0 +1,99 @@
> > +#! /bin/bash
> > +# FS QA Test No. 874
> > +#
> > +# Ensure that xfs_fsr handles errors correctly while defragging files.
> > +#
> > +#-----------------------------------------------------------------------
> > +# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf "$tmp".*
> > +}
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +. ./common/attr
> > +. ./common/reflink
> > +. ./common/quota
> 
> Seems this is not needed in this test.
> 
> > +. ./common/inject
> > +
> > +# real QA test starts here
> > +_supported_os Linux
> > +_require_scratch_reflink
> > +_require_cp_reflink
> > +test -x $XFS_FSR_PROG || _notrun "xfs_fsr not found"
> > +_require_xfs_io_error_injection "bmap_finish_one"
> > +_require_xfs_scratch_rmapbt
> > +
> > +_repquota() {
> > +	repquota $SCRATCH_MNT | egrep '^(fsgqa|root|nobody)'
> > +}
> 
> Not used & needed.

Will remove both.

> > +
> > +rm -f "$seqres.full"
> > +
> > +echo "Format and mount"
> > +_scratch_mkfs > "$seqres.full" 2>&1
> > +_scratch_mount >> "$seqres.full" 2>&1
> > +
> > +testdir="$SCRATCH_MNT/test-$seq"
> > +blksz=65536
> > +blks=3
> > +mkdir "$testdir"
> > +
> > +echo "Create a many-block file"
> > +_pwrite_byte 0x62 0 $((blksz * blks)) $testdir/file1 >> $seqres.full
> > +_pwrite_byte 0x63 0 $blksz $testdir/file2 >> $seqres.full
> > +_reflink_range $testdir/file2 0 $testdir/file1 $blksz $blksz >> $seqres.full
> > +_scratch_cycle_mount
> > +$XFS_IO_PROG -c 'bmap -v' $testdir/file1 >> $seqres.full
> > +
> > +echo "Inject error"
> > +_scratch_inject_error "bmap_finish_one"
> > +
> > +echo "Defrag the file"
> > +$XFS_FSR_PROG -v -d $testdir/file1 >> $seqres.full 2>&1
> > +
> > +echo "FS should be shut down, touch will fail"
> > +touch $SCRATCH_MNT/badfs 2>&1 | _filter_scratch
> > +
> > +echo "Remount to replay log" | tee /dev/ttyprintk
> > +_scratch_inject_logprint >> $seqres.full
> > +
> > +echo "Check extent count" | tee /dev/ttyprintk
> > +$XFS_IO_PROG -c 'stat -v' $testdir/file1 >> $seqres.full
> > +$XFS_IO_PROG -c 'stat -v' $testdir/file2 >> $seqres.full
> > +echo "extents: $old_nextents -> $new_nextents" >> $seqres.full
> > +
> > +echo "FS should be online, touch should succeed"
> > +touch $SCRATCH_MNT/goodfs
> > +$XFS_IO_PROG -c 'bmap -v' $testdir/file1 >> $seqres.full
> > +
> > +# success, all done
> > +status=0
> > +exit
> > diff --git a/tests/xfs/874.out b/tests/xfs/874.out
> > new file mode 100644
> > index 0000000..dbc0f49
> > --- /dev/null
> > +++ b/tests/xfs/874.out
> > @@ -0,0 +1,10 @@
> > +QA output created by 874
> > +Format and mount
> > +Create a many-block file
> > +Inject error
> > +Defrag the file
> > +FS should be shut down, touch will fail
> > +touch: cannot touch 'SCRATCH_MNT/badfs': Input/output error
> > +Remount to replay log
> > +Check extent count
> > +FS should be online, touch should succeed
> > diff --git a/tests/xfs/875 b/tests/xfs/875
> > new file mode 100755
> > index 0000000..17c28db
> > --- /dev/null
> > +++ b/tests/xfs/875
> > @@ -0,0 +1,100 @@
> > +#! /bin/bash
> > +# FS QA Test No. 875
> > +#
> > +# Ensure that xfs_fsr handles quota correctly while defragging files.
> > +#
> > +#-----------------------------------------------------------------------
> > +# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf "$tmp".*
> > +}
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +. ./common/attr
> > +. ./common/reflink
> > +. ./common/quota
> > +
> > +# real QA test starts here
> > +_supported_os Linux
> > +_require_scratch_reflink
> > +_require_cp_reflink
> > +test -x $XFS_FSR_PROG || _notrun "xfs_fsr not found"
> > +_require_quota
> > +_require_nobody
> > +
> > +_repquota() {
> > +	repquota $SCRATCH_MNT | egrep '^(fsgqa|root|nobody)'
> > +}
> 
> Helpers starting with "_" are usually from common code, I'd rename it to
> something like "do_repquota" and put the open brace to a new line.

Ok.

> Thanks,
> Eryu
> 
> > +
> > +rm -f "$seqres.full"
> > +
> > +echo "Format and mount"
> > +_scratch_mkfs > "$seqres.full" 2>&1
> > +export MOUNT_OPTIONS="-o usrquota,grpquota $MOUNT_OPTIONS"
> > +_scratch_mount >> "$seqres.full" 2>&1
> > +quotacheck -u -g $SCRATCH_MNT 2> /dev/null
> > +quotaon $SCRATCH_MNT 2> /dev/null
> > +
> > +testdir="$SCRATCH_MNT/test-$seq"
> > +blksz=65536
> > +blks=3
> > +mkdir "$testdir"
> > +
> > +echo "Create a many-block file"
> > +touch $testdir/file1
> > +chown nobody $testdir/file1
> > +touch $testdir/file2
> > +chown nobody $testdir/file2
> > +_pwrite_byte 0x62 0 $((blksz * blks)) $testdir/file1 >> $seqres.full
> > +_pwrite_byte 0x63 0 $blksz $testdir/file2 >> $seqres.full
> > +_reflink_range $testdir/file2 0 $testdir/file1 $blksz $blksz >> $seqres.full
> > +_repquota
> > +_scratch_cycle_mount
> > +
> > +echo "Defrag the file"
> > +old_nextents=$(xfs_io -c 'stat -v' $testdir/file1 | grep 'nextents' | cut -d ' ' -f 3)
> > +$XFS_FSR_PROG -v -d $testdir/file1 >> $seqres.full
> > +new_nextents=$(xfs_io -c 'stat -v' $testdir/file1 | grep 'nextents' | cut -d ' ' -f 3)
> > +_repquota
> > +
> > +echo "Remount the FS to see if accounting changes"
> > +_scratch_cycle_mount
> > +_repquota
> > +
> > +echo "Check extent count"
> > +$XFS_IO_PROG -c 'stat -v' $testdir/file1 >> $seqres.full
> > +$XFS_IO_PROG -c 'stat -v' $testdir/file2 >> $seqres.full
> > +echo "extents: $old_nextents -> $new_nextents" >> $seqres.full
> > +test $old_nextents -gt $new_nextents || echo "FAIL: $old_nextents -> $new_nextents"
> > +
> > +# success, all done
> > +status=0
> > +exit
> > diff --git a/tests/xfs/875.out b/tests/xfs/875.out
> > new file mode 100644
> > index 0000000..57653e9
> > --- /dev/null
> > +++ b/tests/xfs/875.out
> > @@ -0,0 +1,12 @@
> > +QA output created by 875
> > +Format and mount
> > +Create a many-block file
> > +root      --       0       0       0              4     0     0       
> > +nobody    --     256       0       0              2     0     0       
> > +Defrag the file
> > +root      --       0       0       0              4     0     0       
> > +nobody    --     256       0       0              2     0     0       
> > +Remount the FS to see if accounting changes
> > +root      --       0       0       0              4     0     0       
> > +nobody    --     256       0       0              2     0     0       
> > +Check extent count
> > diff --git a/tests/xfs/group b/tests/xfs/group
> > index 5ccf3d6..16f7947 100644
> > --- a/tests/xfs/group
> > +++ b/tests/xfs/group
> > @@ -306,3 +306,6 @@
> >  325 auto quick clone
> >  326 auto quick clone
> >  327 auto quick clone
> > +873 auto quick clone fsr
> > +874 auto quick clone fsr
> > +875 auto quick clone fsr quota
> >