Date:   Fri, 14 Jul 2017 19:55:09 -0300
From:   Ernesto A. Fernández 
        <ernesto.mnd.fernandez@...il.com>
To:     fstests@...r.kernel.org
Cc:     Christoph Hellwig <hch@...radead.org>,
        Eryu Guan <eguan@...hat.com>, linux-ext4@...r.kernel.org,
        jfs-discussion@...ts.sourceforge.net,
        reiserfs-devel@...r.kernel.org,
        Ernesto A. Fernández 
        <ernesto.mnd.fernandez@...il.com>
Subject: [xfstests PATCH v3] generic: add test of file mode when setfacl fails

Check that the group permission bits of a file are not altered when setfacl
fails. At the time of this patch the test fails for at least ext2, ext4 and
jfs.

Note that this test is not meaningful for all filesystems, because some
will still succeed in setting the acls. This does not mean they don't have
a bug in how they would handle an error.

Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@...il.com>
---
Changes in v3:
  - Several fixes requested by Eryu Guan (thank you for your review), most
    importantly:
    - Place the jfs support in a separate patch, already sent.
    - Make the test fail when the scratch device does not mount, so rootfs
      won't be filled.
    - Add the test to auto and quick groups.
Changes in v2:
  - Use the scratch dev instead of the test dev so we can make a small fs and
    fill it faster. As suggested by Christoph Hellwig.
  - Make jfs work with _scratch_mkfs_sized, needed for the above.
  - Remove the mention to an issue with reiserfs, since I now believe the
    problem is on their side.

 tests/generic/447     | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/447.out |  2 ++
 tests/generic/group   |  1 +
 3 files changed, 91 insertions(+)
 create mode 100755 tests/generic/447
 create mode 100644 tests/generic/447.out

diff --git a/tests/generic/447 b/tests/generic/447
new file mode 100755
index 0000000..c3062c8
--- /dev/null
+++ b/tests/generic/447
@@ -0,0 +1,88 @@
+#! /bin/bash
+# FS QA Test 447
+#
+# Fill the device and set as many extended attributes to a file as
+# possible. Then call setfacl on it and, if this fails for lack of
+# space, test that the permissions remain the same.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Ernesto A. Fernandez.  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/attr
+
+# 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_scratch
+_require_test
+_require_acls
+_require_attrs
+
+_scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mount || _fail "mount failed"
+
+TFILE=$SCRATCH_MNT/testfile.$seq
+
+# Create the test file and choose its permissions
+touch $TFILE
+chmod u+rwx $TFILE
+chmod go-rwx $TFILE
+
+# Try to run out of space so setfacl will fail
+$XFS_IO_PROG -c "pwrite 0 50m" $TFILE >>$seqres.full 2>&1
+i=1
+while setfattr -n user.$i $TFILE &>/dev/null; do
+	((++i))
+done
+
+if setfacl -m m:r $TFILE &>/dev/null; then
+	# setfacl succeeded, so the test was meaningless
+	# The filesystem might still have an issue
+	status=0
+	echo "-rwx------"
+	exit
+fi
+
+# Since setfacl failed, the permissions should not have changed
+stat -c %A $TFILE
+
+status=0
+exit
diff --git a/tests/generic/447.out b/tests/generic/447.out
new file mode 100644
index 0000000..adec877
--- /dev/null
+++ b/tests/generic/447.out
@@ -0,0 +1,2 @@
+QA output created by 447
+-rwx------
diff --git a/tests/generic/group b/tests/generic/group
index 8c1e21a..a3ec390 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -449,3 +449,4 @@
 444 auto quick acl
 445 auto quick rw
 446 auto quick rw dangerous
+447 auto quick acl
-- 
2.1.4

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