generic: add a basic O_TMPFILE test

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/generic/004

@@ -0,0 +1,65 @@
+#! /bin/bash
+# FS QA Test No. 004
+#
+# Test O_TMPFILE opens, and linking them back into the namespace.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2014 Christoph Hellwig.  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 ${testfile}
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+
+_require_xfs_io_command "flink"
+
+testfile="${TEST_DIR}/tst-tmpfile-flink"
+
+# test creating a r/w tmpfile, do I/O and link it into the namespace
+$XFS_IO_PROG -T \
+	-c "pwrite 0 4096" \
+	-c "pread 0 4096" \
+	-c "flink ${testfile}" \
+	${TEST_DIR} | _filter_xfs_io
+
+rm ${testfile}
+
+# test creating a r/o tmpfile.  Should fail
+$XFS_IO_PROG -Tr ${TEST_DIR} -c "close" | _filter_test_dir
+
+# success, all done
+status=0
+exit

tests/generic/004.out

@@ -0,0 +1,6 @@
+QA output created by 004
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+/mnt/test: Invalid argument

tests/generic/group

@@ -6,6 +6,7 @@
 001 rw dir udf auto quick
 002 metadata udf auto quick
 003 atime auto quick
+004 auto quick
 005 dir udf auto quick
 006 dir udf auto quick
 007 dir udf auto quick