[PATCH 18/23] xfs: test the automatic cowextsize extent garbage collector

Darrick J. Wong
2016-02-09T01:13:48Z

tests/xfs/231 | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/231.out | 17 +++++++
tests/xfs/232 | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/232.out | 17 +++++++
tests/xfs/group | 2 +
5 files changed, 308 insertions(+)
create mode 100755 tests/xfs/231
create mode 100644 tests/xfs/231.out
create mode 100755 tests/xfs/232
create mode 100644 tests/xfs/232.out

diff --git a/tests/xfs/231 b/tests/xfs/231
new file mode 100755
index 0000000..d9ae102
--- /dev/null
+++ b/tests/xfs/231
@@ -0,0 +1,135 @@
+#! /bin/bash
+# FS QA Test No. 231
+#
+# Test recovery of unused CoW reservations:
+# - Create two reflinked files. Set extsz hint on second file.
+# - Dirty a single byte on a number of CoW reservations in the second file.
+# - Fsync to flush out the dirty pages.
+# - Wait for the reclaim to run.
+# - Write more and see how bad fragmentation is.
+#
+#-----------------------------------------------------------------------
+# 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 /
+ echo $old_cow_lifetime > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
+ #rm -rf "$tmp".* "$testdir"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_cp_reflink
+_require_fiemap
+
+old_cow_lifetime=$(cat /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime)
+
+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"
+rm -rf $testdir
+mkdir $testdir
+
+blksz=65536
+nr=64
+bsz=2
+
+free_blocks=$(stat -f -c '%a' "$testdir")
+real_blksz=$(stat -f -c '%S' "$testdir")
+space_needed=$(((blksz * nr * 3) * 5 / 4))
+space_avail=$((free_blocks * real_blksz))
+internal_blks=$((blksz * nr / real_blksz))
+test $space_needed -gt $space_avail && _notrun "Not enough space. $space_avail < $space_needed"
+
+echo "Create the original files"
+"$XFS_IO_PROG" -c "cowextsize $((blksz * bsz))" "$testdir"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x61 -b $((blksz * bsz)) 0 $((blksz * nr))" "$testdir/file1" >> "$seqres.full"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x61 -b $((blksz * bsz)) 0 $((blksz * nr))" "$testdir/file2.chk" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$testdir/file1" | _filter_scratch
+md5sum "$testdir/file2" | _filter_scratch
+md5sum "$testdir/file2.chk" | _filter_scratch
+
+echo "CoW and leave leftovers"
+echo 2 > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
+seq 2 2 $((nr - 1)) | while read f; do
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" "$testdir/file2" >> "$seqres.full"
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" "$testdir/file2.chk" >> "$seqres.full"
+done
+sync
+
+echo "Wait for CoW expiration"
+sleep 3
+
+echo "Allocate free space"
+for i in $(seq 1 32); do
+ "$XFS_IO_PROG" -f -c "falloc 0 1" "$testdir/junk.$i" >> "$seqres.full"
+done
+"$XFS_IO_PROG" -f -c "falloc 0 $((blksz * nr))" "$testdir/junk" >> "$seqres.full"
+
+echo "CoW and leave leftovers"
+echo $old_cow_lifetime > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
+seq 2 2 $((nr - 1)) | while read f; do
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f)) 1" "$testdir/file2" >> "$seqres.full"
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f)) 1" "$testdir/file2.chk" >> "$seqres.full"
+done
+sync
+
+echo "Compare files"
+md5sum "$testdir/file1" | _filter_scratch
+md5sum "$testdir/file2" | _filter_scratch
+md5sum "$testdir/file2.chk" | _filter_scratch
+
+echo "Check extent counts"
+old_extents=$(_count_extents "$testdir/file1")
+new_extents=$(_count_extents "$testdir/file2")
+
+echo "old extents: $old_extents" >> "$seqres.full"
+echo "new extents: $new_extents" >> "$seqres.full"
+echo "maximum extents: $internal_blks" >> "$seqres.full"
+test $new_extents -lt $((internal_blks / 7)) || _fail "file2 badly fragmented"
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/231.out b/tests/xfs/231.out
new file mode 100644
index 0000000..872ce7b
--- /dev/null
+++ b/tests/xfs/231.out
@@ -0,0 +1,17 @@
+QA output created by 231
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-231/file1
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-231/file2
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-231/file2.chk
+CoW and leave leftovers
+Wait for CoW expiration
+Allocate free space
+CoW and leave leftovers
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-231/file1
+211b0f725e67149d75104a747365eb70 SCRATCH_MNT/test-231/file2
+211b0f725e67149d75104a747365eb70 SCRATCH_MNT/test-231/file2.chk
+Check extent counts
+Check for damage
diff --git a/tests/xfs/232 b/tests/xfs/232
new file mode 100755
index 0000000..1cbc791
--- /dev/null
+++ b/tests/xfs/232
@@ -0,0 +1,137 @@
+#! /bin/bash
+# FS QA Test No. 232
+#
+# Test non-recovery of unused CoW reservations for dirty files:
+# - Create two reflinked files. Set extsz hint on second file.
+# - Dirty a single byte on a number of CoW reservations in the second file.
+# - Fsync to flush out the dirty pages.
+# - Dirty a single byte anywhere in the second file.
+# - Wait for the reclaim to run.
+# - Write more and see how bad fragmentation is.
+#
+#-----------------------------------------------------------------------
+# 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 /
+ echo $old_cow_lifetime > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
+ #rm -rf "$tmp".* "$testdir"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_cp_reflink
+_require_fiemap
+
+old_cow_lifetime=$(cat /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime)
+
+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"
+rm -rf $testdir
+mkdir $testdir
+
+blksz=65536
+nr=64
+bsz=2
+
+free_blocks=$(stat -f -c '%a' "$testdir")
+real_blksz=$(stat -f -c '%S' "$testdir")
+space_needed=$(((blksz * nr * 3) * 5 / 4))
+space_avail=$((free_blocks * real_blksz))
+internal_blks=$((blksz * nr / real_blksz))
+test $space_needed -gt $space_avail && _notrun "Not enough space. $space_avail < $space_needed"
+
+echo "Create the original files"
+"$XFS_IO_PROG" -c "cowextsize $((blksz * bsz))" "$testdir"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x61 -b $((blksz * bsz)) 0 $((blksz * nr))" "$testdir/file1" >> "$seqres.full"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x61 -b $((blksz * bsz)) 0 $((blksz * nr))" "$testdir/file2.chk" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$testdir/file1" | _filter_scratch
+md5sum "$testdir/file2" | _filter_scratch
+md5sum "$testdir/file2.chk" | _filter_scratch
+
+echo "CoW and leave leftovers"
+echo 2 > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
+seq 2 2 $((nr - 1)) | while read f; do
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" "$testdir/file2" >> "$seqres.full"
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f - 1)) 1" "$testdir/file2.chk" >> "$seqres.full"
+done
+sync
+
+echo "Wait for CoW expiration"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * 2)) 1" "$testdir/file2" >> "$seqres.full"
+sleep 3
+
+echo "Allocate free space"
+for i in $(seq 1 32); do
+ "$XFS_IO_PROG" -f -c "falloc 0 1" "$testdir/junk.$i" >> "$seqres.full"
+done
+"$XFS_IO_PROG" -f -c "falloc 0 $((blksz * nr))" "$testdir/junk" >> "$seqres.full"
+
+echo "CoW and leave leftovers"
+echo $old_cow_lifetime > /proc/sys/fs/xfs/speculative_cow_prealloc_lifetime
+seq 2 2 $((nr - 1)) | while read f; do
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f)) 1" "$testdir/file2" >> "$seqres.full"
+ "$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((blksz * f)) 1" "$testdir/file2.chk" >> "$seqres.full"
+done
+sync
+
+echo "Compare files"
+md5sum "$testdir/file1" | _filter_scratch
+md5sum "$testdir/file2" | _filter_scratch
+md5sum "$testdir/file2.chk" | _filter_scratch
+
+echo "Check extent counts"
+old_extents=$(_count_extents "$testdir/file1")
+new_extents=$(_count_extents "$testdir/file2")
+
+echo "old extents: $old_extents" >> "$seqres.full"
+echo "new extents: $new_extents" >> "$seqres.full"
+echo "maximum extents: $internal_blks" >> "$seqres.full"
+test $new_extents -lt $((internal_blks / 12)) || _fail "file2 not sufficiently fragmented"
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/232.out b/tests/xfs/232.out
new file mode 100644
index 0000000..ccabdaa
--- /dev/null
+++ b/tests/xfs/232.out
@@ -0,0 +1,17 @@
+QA output created by 232
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-232/file1
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-232/file2
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-232/file2.chk
+CoW and leave leftovers
+Wait for CoW expiration
+Allocate free space
+CoW and leave leftovers
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1 SCRATCH_MNT/test-232/file1
+211b0f725e67149d75104a747365eb70 SCRATCH_MNT/test-232/file2
+211b0f725e67149d75104a747365eb70 SCRATCH_MNT/test-232/file2.chk
+Check extent counts
+Check for damage
diff --git a/tests/xfs/group b/tests/xfs/group
index da83274..de3c7d6 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -228,6 +228,8 @@
228 auto quick clone
229 auto rw
230 auto quick clone
+231 auto quick clone
+232 auto quick clone
238 auto quick metadata ioctl
242 auto quick prealloc
244 auto quota quick