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[76.104.211.44]) by mx.google.com with ESMTPSA id v6sm9508559pdq.80.2015.06.02.22.05.38 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 02 Jun 2015 22:05:38 -0700 (PDT) From: Omar Sandoval To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, Omar Sandoval Subject: [PATCH v2] btrfs: test premature submount unmounting when deleting default subvolume Date: Tue, 2 Jun 2015 22:05:30 -0700 Message-Id: X-Mailer: git-send-email 2.4.2 Sender: fstests-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a regression test for a problem where attempting to delete the default subvolume would fail (as expected), but not until after all submounts under the subvolume were unmounted. Signed-off-by: Omar Sandoval Reviewed-by: Eryu Guan --- v1->v2: - Simpler test: just depends on umount of the bind mount succeeding instead of running find. Without the patch applied, the bind mount will disappear so umount will fail. - Fix Eryu's comments (better subject, copyright, use _btrfs_get_subvolid) tests/btrfs/089 | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/089.out | 2 ++ tests/btrfs/group | 1 + 3 files changed, 84 insertions(+) create mode 100755 tests/btrfs/089 create mode 100644 tests/btrfs/089.out diff --git a/tests/btrfs/089 b/tests/btrfs/089 new file mode 100755 index 000000000000..c81df2a3b225 --- /dev/null +++ b/tests/btrfs/089 @@ -0,0 +1,81 @@ +#! /bin/bash +# FS QA Test 089 +# +# Test deleting the default subvolume, making sure that it fails and that +# submounts under it are not unmounted prematurely. This is a regression test +# for Linux commit "Btrfs: don't invalidate root dentry when subvolume deletion +# fails". +# +#----------------------------------------------------------------------- +# Copyright (c) 2015 Omar Sandoval. 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/filter.btrfs + +# real QA test starts here + +# Modify as appropriate. +_need_to_be_root +_supported_fs btrfs +_supported_os Linux +_require_scratch + +rm -f $seqres.full + +_scratch_mkfs >>$seqres.full 2>&1 +_scratch_mount + +# Create a new subvolume and make it the default subvolume. +$BTRFS_UTIL_PROG subvolume create "$SCRATCH_MNT/testvol" >> $seqres.full 2>&1 \ + || _fail "couldn't create subvol" +testvol_id=$(_btrfs_get_subvolid "$SCRATCH_MNT" testvol) +$BTRFS_UTIL_PROG subvolume set-default $testvol_id "$SCRATCH_MNT" >> $seqres.full 2>&1 \ + || _fail "couldn't set default" + +# Bind-mount a directory under the default subvolume. +mkdir "$SCRATCH_MNT/testvol/testdir" +touch "$SCRATCH_MNT/testvol/testdir/testfile" +mkdir "$SCRATCH_MNT/testvol/mnt" +mount --bind "$SCRATCH_MNT/testvol/testdir" "$SCRATCH_MNT/testvol/mnt" + +# Now attempt to delete the default subvolume, which should fail. +$BTRFS_UTIL_PROG subvolume delete "$SCRATCH_MNT/testvol" >> $seqres.full 2>&1 + +# Unmount the bind mount, which should still be alive. +$UMOUNT_PROG "$SCRATCH_MNT/testvol/mnt" + +echo "Silence is golden" +status=0 +exit diff --git a/tests/btrfs/089.out b/tests/btrfs/089.out new file mode 100644 index 000000000000..a7fcdee9b767 --- /dev/null +++ b/tests/btrfs/089.out @@ -0,0 +1,2 @@ +QA output created by 089 +Silence is golden diff --git a/tests/btrfs/group b/tests/btrfs/group index ffe18bff0d21..616d060758c1 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -91,6 +91,7 @@ 086 auto quick clone 087 auto quick send 088 auto quick metadata +089 auto quick subvol 090 auto quick metadata 091 auto quick qgroup 092 auto quick send