generic: run write(2) and fallocate(2) in parallel

Currently in btrfs, there is something wrong with fallocate(2)'s
data space reservation, it'll temporarily occupy more data space
thant it really needs, which in turn will impact other operations'
data request.

In this test case, it runs write(2) and fallocate(2) in parallel and
the total needed data space for these two operations don't exceed
whole fs free data space, to see whether we will get any unexpected
ENOSPC error.

Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

diff --git a/tests/generic/371 b/tests/generic/371
new file mode 100755 (executable)
index 0000000..7955856
--- /dev/null
+++ b/tests/generic/371
@@ -0,0 +1,75 @@
+#! /bin/bash
+# FS QA Test 371
+#
+# Run write(2) and fallocate(2) in parallel and the total needed data space
+# for these operations don't exceed whole fs free data space, to see whether
+# we will get any unexpected ENOSPC error.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 Fujitsu.  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
+
+# Modify as appropriate.
+_supported_fs generic
+_supported_os Linux
+_require_scratch
+_require_xfs_io_command "falloc"
+
+_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mount
+
+testfile1=$SCRATCH_MNT/testfile1
+testfile2=$SCRATCH_MNT/testfile2
+
+echo "Silence is golden"
+for ((i=0; i<100; i++)); do
+       $XFS_IO_PROG -fc "pwrite 0 80M" $testfile1 >/dev/null
+       rm -f $testfile1
+done &
+pids=$!
+
+for ((i=0; i<100; i++)); do
+       $XFS_IO_PROG -fc "falloc 0 80M" $testfile2 >/dev/null
+       rm -f $testfile2
+done &
+pids="$pids $!"
+
+wait $pids
+status=0
+exit

diff --git a/tests/generic/371.out b/tests/generic/371.out
new file mode 100644 (file)
index 0000000..22ec8a2
--- /dev/null
+++ b/tests/generic/371.out
@@ -0,0 +1,2 @@
+QA output created by 371
+Silence is golden

diff --git a/tests/generic/group b/tests/generic/group
index 97ecb65011ec0c5069a9bc689758f8632413b3b0..123628152b91aa68f126327adfad162907aa3f2d 100644 (file)
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -373,3 +373,4 @@
 368 auto quick richacl
 369 auto quick richacl
 370 auto quick richacl
+371 auto quick enospc prealloc