In btrfs, when truncate operation fails for enospc reason, file may still
have some disk blocks, but it will fail to update filesize accordingly.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
---
tests/btrfs/124 | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/124.out | 2 ++
tests/btrfs/group | 1 +
3 files changed, 89 insertions(+)
create mode 100755 tests/btrfs/124
create mode 100644 tests/btrfs/124.out
diff --git a/tests/btrfs/124 b/tests/btrfs/124
new file mode 100755
index 0000000..1a13ddf
--- /dev/null
+++ b/tests/btrfs/124
@@ -0,0 +1,86 @@
+#! /bin/bash
+# FS QA Test 124
+#
+# Test whether truncate can update file size correctly when truncate fails
+#
+# When truncate operation fails for enospc reason, file will still
+# have some disk blocks, but it will fail to update filesize accordingly.
+#
+#-----------------------------------------------------------------------
+# 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
+. ./common/reflink
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# Modify as appropriate.
+_supported_fs generic
+_supported_os Linux
+_supported_fs btrfs
+_require_scratch_reflink
+
+MKFS_OPTIONS="-O ^mixed-bg"
+_scratch_mkfs_sized $((101 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mount
+
+blocksize=$((128 * 1024))
+file="$SCRATCH_MNT/testfile"
+filesize=$((12 * 1024 * 1024 * 1024))
+nr=$((filesize / blocksize))
+
+# write the initial block for later reflink
+_pwrite_byte 0xcdcdcdcd 0 $blocksize $file > /dev/null
+
+# use reflink to create the rest of the file, whose all extents are all
+# pointing to the first extent
+for ((i = 1; i < $nr; i++)); do
+ _reflink_range $file 0 $file $(($i * $blocksize)) $blocksize > /dev/null
+done
+
+$XFS_IO_PROG -f -c "truncate 0" $file > /dev/null 2>&1
+disk_usage=`du $file | $AWK_PROG '{print $1}'`
+new_filesize=`ls -l $file | $AWK_PROG '{print $5}'`
+if [ $disk_usage -gt 0 ] && [ $new_filesize -eq 0 ]; then
+ echo "after truncate, file size is 0, but file still owns disk blocks"
+ status=1
+ exit
+fi
+
+echo "Silence is golden"
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/124.out b/tests/btrfs/124.out
new file mode 100644
index 0000000..d7339e6
--- /dev/null
+++ b/tests/btrfs/124.out
@@ -0,0 +1,2 @@
+QA output created by 124
+Silence is golden
diff --git a/tests/btrfs/group b/tests/btrfs/group
index 5a26ed7..8b5050e 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -126,3 +126,4 @@
121 auto quick snapshot qgroup
122 auto quick snapshot qgroup
123 auto quick qgroup
+124 auto quick metadata
--
1.8.3.1
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