[PATCH v2] generic/418: Add test for fallocate() PUNCH_HOLE|KEEP_SIZE

[Calvin Owens <calvinowens@fb.com>]

Verify that punching holes at ends of files does not alter st_size if we
pass FALLOC_FL_KEEP_SIZE to fallocate().

Signed-off-by: Calvin Owens <calvinowens@fb.com>
---
 tests/generic/418     | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/418.out |  3 +++
 tests/generic/group   |  1 +
 3 files changed, 67 insertions(+)
 create mode 100755 tests/generic/418
 create mode 100644 tests/generic/418.out

diff --git a/tests/generic/418 b/tests/generic/418
new file mode 100755
index 0000000..e04d08c
--- /dev/null
+++ b/tests/generic/418
@@ -0,0 +1,63 @@
+#! /bin/bash
+# FS QA Test 418
+#
+# Verify fallocate(mode=FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE) does
+# not alter the file size.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Calvin Owens.  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 $seqres.full
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs generic
+_supported_os Linux
+_require_test
+
+testfile="${TEST_DIR}/testfile"
+
+echo "Testing fallocate(mode=FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE)"
+$XFS_IO_PROG -fc "pwrite -b 2048 0 2048" $testfile
+$XFS_IO_PROG -c "fpunch 2048 2048" $testfile
+$XFS_IO_PROG -c "stat" $testfile 2>/dev/null | grep -F 'stat.size'
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/418.out b/tests/generic/418.out
new file mode 100644
index 0000000..9927731
--- /dev/null
+++ b/tests/generic/418.out
@@ -0,0 +1,3 @@
+QA output created by 418
+Testing fallocate(mode=FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE)
+stat.size = 2048
diff --git a/tests/generic/group b/tests/generic/group
index f0096bb..068aa61 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -420,3 +420,4 @@
 415 auto clone
 416 auto enospc
 417 auto quick shutdown log
+418 auto quick punch
-- 
2.9.3