generic: check symlink to very long path

Test symlink to very long path, so that path could not be hold in
inode, then check symlink file contains correct path.

There was a bug in CRC XFS, that the path in remote symlink was not
correct, this issue is fixed by this kernel commit

2ac56d3 xfs: fix remote symlinks on V5/CRC filesystems

Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

tests/generic/360

@@ -0,0 +1,63 @@
+#! /bin/bash
+# FS QA Test 360
+#
+# Test symlink to very long path, check symlink file contains correct path.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 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	# 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
+
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_test
+
+linkfile=$TEST_DIR/$seq.symlink
+rm -f $linkfile
+
+# Create a symlink points to a very long path, so that the path could not be
+# hold in inode
+ln -s `perl -e 'print "a"x1023'` $linkfile
+
+# Check symlink contains the correct path.
+# 1023 chars are a bit long for golden image output, compute the md5 checksum
+readlink $linkfile | md5sum
+
+# success, all done
+status=0
+exit

tests/generic/360.out

@@ -0,0 +1,2 @@
+QA output created by 360
+cd3b0a56bc304075e28a20a4edd57068  -

tests/generic/group

@@ -362,3 +362,4 @@
 357 auto quick clone
 358 auto quick clone
 359 auto quick clone
+360 auto quick metadata