overlay: regression test for orphan index cleanup on mount
authorAmir Goldstein <amir73il@gmail.com>
Tue, 28 Nov 2017 16:42:01 +0000 (18:42 +0200)
committerEryu Guan <eguan@redhat.com>
Fri, 1 Dec 2017 08:51:00 +0000 (16:51 +0800)
Test nlink accounting of overlay hardlinks with offline modifications.

nlink of overlay inode should account for the union of lower and upper
hardlinks. Orphan index inodes with union nlink 0 should be cleaned on
mount.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
tests/overlay/048 [new file with mode: 0755]
tests/overlay/048.out [new file with mode: 0644]
tests/overlay/group

diff --git a/tests/overlay/048 b/tests/overlay/048
new file mode 100755 (executable)
index 0000000..4b2c58f
--- /dev/null
@@ -0,0 +1,141 @@
+#! /bin/bash
+# FS QA Test 048
+#
+# Test nlink accounting of overlay hardlinks with offline modifications.
+#
+# nlink of overlay inode should account for the union of lower and upper
+# hardlinks. Orphan index inodes with union nlink 0 should be cleaned on
+# mount.
+#
+#-----------------------------------------------------------------------
+# Copyright (C) 2017 CTERA Networks. All Rights Reserved.
+# Author: Amir Goldstein <amir73il@gmail.com>
+#
+# 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"
+
+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
+_supported_fs overlay
+_supported_os Linux
+_require_scratch
+_require_scratch_feature index
+
+report_nlink()
+{
+       when=$1
+
+       # mount and check nlink after overlay offline modification
+       _scratch_mount -o index=on
+
+       # List <nlink> <name>
+       echo "== $when offline =="
+       for f in $HARDLINKS; do
+               _ls_l $SCRATCH_MNT/$f | awk '{ print $2, $9 }' | _filter_scratch
+       done
+
+       $UMOUNT_PROG $SCRATCH_MNT
+}
+
+# Create lower hardlinks
+create_hardlinks()
+{
+       mkdir -p $lowerdir
+       touch $lowerdir/0
+       ln $lowerdir/0 $lowerdir/1
+       ln $lowerdir/0 $lowerdir/2
+}
+
+test_hardlinks_offline()
+{
+       HARDLINKS=`seq 0 2`
+       report_nlink "all upper"
+
+       # Unlink copied up hardlink
+       rm $upperdir/0
+       HARDLINKS=`seq 1 2`
+       report_nlink "unlink upper"
+
+       # Link to copied up hardlink
+       ln $upperdir/2 $upperdir/3
+       HARDLINKS=`seq 1 3`
+       report_nlink "link upper"
+
+       # Rename over copied up hardlink
+       touch $upperdir/new
+       mv $upperdir/new $upperdir/1
+       HARDLINKS=`seq 2 3`
+       report_nlink "rename over upper"
+
+       # Unlink new upper hardlink
+       rm $upperdir/3
+       HARDLINKS=2
+       report_nlink "unlink new upper"
+
+       # Unlink last upper and drop union nlink to zero
+       rm $upperdir/2
+
+       HARDLINKS=
+       report_nlink "unlink last lower"
+
+       # Verify that orphan index is cleaned when dropping nlink to zero
+       ls $workdir/index
+}
+
+lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
+upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
+workdir=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
+
+# Remove all files from previous tests
+_scratch_mkfs
+
+# Create lower hardlinks
+create_hardlinks
+
+# Enable overlay index feature to prevent breaking hardlinks on copy up
+_scratch_mount -o index=on
+
+# Copy up and index hardlinks
+touch $SCRATCH_MNT/0
+touch $SCRATCH_MNT/1
+touch $SCRATCH_MNT/2
+
+# Perform the rest of the changes offline
+$UMOUNT_PROG $SCRATCH_MNT
+
+test_hardlinks_offline
+
+status=0
+exit
diff --git a/tests/overlay/048.out b/tests/overlay/048.out
new file mode 100644 (file)
index 0000000..0527dec
--- /dev/null
@@ -0,0 +1,18 @@
+QA output created by 048
+== all upper offline ==
+3 SCRATCH_MNT/0
+3 SCRATCH_MNT/1
+3 SCRATCH_MNT/2
+== unlink upper offline ==
+2 SCRATCH_MNT/1
+2 SCRATCH_MNT/2
+== link upper offline ==
+3 SCRATCH_MNT/1
+3 SCRATCH_MNT/2
+3 SCRATCH_MNT/3
+== rename over upper offline ==
+2 SCRATCH_MNT/2
+2 SCRATCH_MNT/3
+== unlink new upper offline ==
+1 SCRATCH_MNT/2
+== unlink last lower offline ==
index 3e31d2df6521826dd97caf48a8245be62dab2506..7e541e453884a0f809711f0c27ddb7f3db266c92 100644 (file)
@@ -48,3 +48,4 @@
 043 auto quick copyup nonsamefs
 044 auto quick copyup hardlink nonsamefs
 047 auto quick copyup hardlink
+048 auto quick copyup hardlink