[v3] btrfs: test premature submount unmounting when deleting default subvolume
diff mbox

Message ID 1ebef916f54960cf6fef34be950e3d38cc3a50b0.1433537929.git.osandov@osandov.com
State New
Headers show

Commit Message

Omar Sandoval June 5, 2015, 9 p.m. UTC
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.

Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Omar Sandoval <osandov@osandov.com>
---
v2->v3:
- Update description (thanks, Eryu)
- Remove unneeded touch

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     | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/btrfs/089.out |  2 ++
 tests/btrfs/group   |  1 +
 3 files changed, 82 insertions(+)
 create mode 100755 tests/btrfs/089
 create mode 100644 tests/btrfs/089.out

Comments

Filipe Manana June 19, 2015, 5:49 p.m. UTC | #1
On Fri, Jun 5, 2015 at 10:00 PM, Omar Sandoval <osandov@osandov.com> wrote:
> 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.
>
> Reviewed-by: Eryu Guan <eguan@redhat.com>
> Signed-off-by: Omar Sandoval <osandov@osandov.com>

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>

Thanks for doing this.

> ---
> v2->v3:
> - Update description (thanks, Eryu)
> - Remove unneeded touch
>
> 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     | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/btrfs/089.out |  2 ++
>  tests/btrfs/group   |  1 +
>  3 files changed, 82 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..537269824b62
> --- /dev/null
> +++ b/tests/btrfs/089
> @@ -0,0 +1,79 @@
> +#! /bin/bash
> +# FS QA Test 089
> +#
> +# Test deleting the default subvolume, making sure 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"
> +mkdir "$SCRATCH_MNT/testvol/mnt"
> +mount --bind "$SCRATCH_MNT/testvol/testdir" "$SCRATCH_MNT/testvol/mnt"
> +
> +# Now attempt to delete the default subvolume.
> +$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
> --
> 2.4.2
>
> --
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Patch
diff mbox

diff --git a/tests/btrfs/089 b/tests/btrfs/089
new file mode 100755
index 000000000000..537269824b62
--- /dev/null
+++ b/tests/btrfs/089
@@ -0,0 +1,79 @@ 
+#! /bin/bash
+# FS QA Test 089
+#
+# Test deleting the default subvolume, making sure 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"
+mkdir "$SCRATCH_MNT/testvol/mnt"
+mount --bind "$SCRATCH_MNT/testvol/testdir" "$SCRATCH_MNT/testvol/mnt"
+
+# Now attempt to delete the default subvolume.
+$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