btrfs: new case to run btrfs balance and remount with different compress algorithms

Run btrfs balance and remount with different compress algorithms
simultaneously, with fsstress running in background.

Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/common/rc b/common/rc
index 8776212f253e68dcc48fb00541e586cb60935871..2a99e23b2a7838a62880f2f776feaf584e95a9cb 100644 (file)
--- a/common/rc
+++ b/common/rc
@@ -2617,6 +2617,20 @@ _btrfs_stress_defrag()
        done
 }
 
+# stress btrfs by remounting it with different compression algorithms in a loop
+# run this with fsstress running at background could exercise the compression
+# code path and ensure no race when switching compression algorithm with constant
+# I/O activity.
+_btrfs_stress_remount_compress()
+{
+       local btrfs_mnt=$1
+       while true; do
+               for algo in no zlib lzo; do
+                       $MOUNT_PROG -o remount,compress=$algo $btrfs_mnt
+               done
+       done
+}
+
 init_rc()
 {
        if [ "$iam" == new ]

diff --git a/tests/btrfs/063 b/tests/btrfs/063
new file mode 100755 (executable)
index 0000000..854c941
--- /dev/null
+++ b/tests/btrfs/063
@@ -0,0 +1,114 @@
+#! /bin/bash
+# FSQA Test No. btrfs/063
+#
+# Run btrfs balance and remount with different compress algorithms
+# simultaneously, with fsstress running in background.
+#
+#-----------------------------------------------------------------------
+# Copyright (C) 2014 Red Hat Inc. 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
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+       cd /
+       rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+# we check scratch dev after each loop
+_require_scratch_nocheck
+_require_scratch_dev_pool 4
+_btrfs_get_profile_configs
+
+rm -f $seqres.full
+
+run_test()
+{
+       local mkfs_opts=$1
+
+       echo "Test $mkfs_opts" >>$seqres.full
+
+       _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
+       # make sure we created btrfs with desired options
+       if [ $? -ne 0 ]; then
+               echo "mkfs $mkfs_opts failed"
+               return
+       fi
+       _scratch_mount >>$seqres.full 2>&1
+
+       args=`_scale_fsstress_args -p 20 -n 100 $FSSTRESS_AVOID -d $SCRATCH_MNT/stressdir`
+       echo "Run fsstress $args" >>$seqres.full
+       $FSSTRESS_PROG $args >/dev/null 2>&1 &
+       fsstress_pid=$!
+
+       echo -n "Start balance worker: " >>$seqres.full
+       _btrfs_stress_balance $SCRATCH_MNT >/dev/null 2>&1 &
+       balance_pid=$!
+       echo "$balance_pid" >>$seqres.full
+
+       echo -n "Start remount worker: " >>$seqres.full
+       _btrfs_stress_remount_compress $SCRATCH_MNT >/dev/null 2>&1 &
+       remount_pid=$!
+       echo "$remount_pid" >>$seqres.full
+
+       echo "Wait for fsstress to exit and kill all background workers" >>$seqres.full
+       wait $fsstress_pid
+       kill $balance_pid $remount_pid
+       wait
+       # wait for the balance and remount loop to finish
+       while ps aux | grep "balance start" | grep -qv grep; do
+               sleep 1
+       done
+       while ps aux | grep "mount.*$SCRATCH_MNT" | grep -qv grep; do
+               sleep 1
+       done
+
+       echo "Scrub the filesystem" >>$seqres.full
+       $BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
+       if [ $? -ne 0 ]; then
+               echo "Scrub find errors in \"$mkfs_opts\" test" | tee -a $seqres.full
+       fi
+
+       _scratch_unmount
+       # we called _require_scratch_nocheck instead of _require_scratch
+       # do check after test for each profile config
+       _check_scratch_fs
+}
+
+echo "Silence is golden"
+for t in "${_btrfs_profile_configs[@]}"; do
+       run_test "$t"
+done
+
+status=0
+exit

diff --git a/tests/btrfs/063.out b/tests/btrfs/063.out
new file mode 100644 (file)
index 0000000..de35fc5
--- /dev/null
+++ b/tests/btrfs/063.out
@@ -0,0 +1,2 @@
+QA output created by 063
+Silence is golden

diff --git a/tests/btrfs/group b/tests/btrfs/group
index a6c39f77f1df50251db9e32787a4d64414862316..b7025f60521b3602302a445c9a08ad155311831b 100644 (file)
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -65,3 +65,4 @@
 060 auto balance subvol
 061 auto balance scrub
 062 auto balance defrag compress
+063 auto balance remount compress