Re: [ fstests PATCHv3 2/2] btrfs: Test subvolume delete --subvolid feature

[Marcos Paulo de Souza <marcos@mpdesouza.com>]

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On Sun, Mar 01, 2020 at 09:54:06PM +0800, Eryu Guan wrote:
> On Mon, Feb 24, 2020 at 12:13:41AM -0300, Marcos Paulo de Souza wrote:
> > From: Marcos Paulo de Souza <mpdesouza@suse.com>
> > 
> > Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
> 
> Looks fine to me overall, but it'd be better to have commit message to
> describe the test.
> 
> Also, it'd be great if btrfs folks could help review it.

Indeed, a commit message makes things better. I'm attaching here a new version
of the patch containing a commit message. This new version also bumps the test
number from 203 -> 207, since other messages were merged after I sent my patch.

While adding the commit message I found in Josef's commit that he added a new
btrfs test 206, but groups contained test 204[1]. Is it a typo?

[1]: https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/commit/?id=1d6d14db1165db1ffc87fbddcf97eb70fdf84607

> 
> Thanks,
> Eryu
> 
> > ---
> > Changes from v2:
> > * Added 'Created subvolume...' into 203.out to match the subvolume creating command
> > * Changed awk to $AWK_PROG, suggested by Eryu
> > * Changed _run_btrfs_util_prog to $BTRFS_UTIL_PROG, suggested by Eryu
> > * Use _scratch_unmount instead of executing umount by hand, sugested by Eryu
> > * Created a local function to delete and list subvolumes, suggested by Eryu
> > 
> > Changes from v1:
> > * Added some prints printing what is being tested
> > * The test now uses the _btrfs_get_subvolid to get subvolumeids instead of using
> >   plain integers
> > 
> > 
> >  tests/btrfs/203     | 68 +++++++++++++++++++++++++++++++++++++++++++++
> >  tests/btrfs/203.out | 17 ++++++++++++
> >  tests/btrfs/group   |  1 +
> >  3 files changed, 86 insertions(+)
> >  create mode 100755 tests/btrfs/203
> >  create mode 100644 tests/btrfs/203.out
> > 
> > diff --git a/tests/btrfs/203 b/tests/btrfs/203
> > new file mode 100755
> > index 00000000..0f662db1
> > --- /dev/null
> > +++ b/tests/btrfs/203
> > @@ -0,0 +1,68 @@
> > +#! /bin/bash
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved.
> > +#
> > +# FSQA Test No. 203
> > +#
> > +# Test subvolume deletion using the subvolume id, even when the subvolume in
> > +# question is in a different mount space.
> > +#
> > +seq=`basename $0`
> > +seqres=$RESULT_DIR/$seq
> > +echo "QA output created by $seq"
> > +tmp=/tmp/$$
> > +status=1	# failure is the default!
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +. ./common/filter.btrfs
> > +
> > +# real QA test starts here
> > +_supported_fs btrfs
> > +_supported_os Linux
> > +_require_scratch
> > +_require_btrfs_command subvolume delete --subvolid
> > +
> > +_scratch_mkfs > /dev/null 2>&1
> > +_scratch_mount
> > +
> > +_delete_and_list()
> > +{
> > +	local subvol_name="$1"
> > +	local msg="$2"
> > +
> > +	SUBVOLID=$(_btrfs_get_subvolid $SCRATCH_MNT "$subvol_name")
> > +	$BTRFS_UTIL_PROG subvolume delete --subvolid $SUBVOLID $SCRATCH_MNT | _filter_scratch
> > +
> > +	echo "$msg"
> > +	$BTRFS_UTIL_PROG subvolume list $SCRATCH_MNT | $AWK_PROG '{ print $NF }'
> > +}
> > +
> > +# Test creating a normal subvolumes
> > +$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1 | _filter_scratch
> > +$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol2 | _filter_scratch
> > +$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol3 | _filter_scratch
> > +
> > +echo "Current subvolume ids:"
> > +$BTRFS_UTIL_PROG subvolume list $SCRATCH_MNT | $AWK_PROG '{ print $NF }'
> > +
> > +# Delete the subvolume subvol1, and list the remaining two subvolumes
> > +_delete_and_list subvol1 "After deleting one subvolume:"
> > +_scratch_unmount
> > +
> > +# Now we mount the subvol2, which makes subvol3 not accessible for this mount
> > +# point, but we should be able to delete it using it's subvolume id
> > +$MOUNT_PROG -o subvol=subvol2 $SCRATCH_DEV $SCRATCH_MNT
> > +_delete_and_list subvol3 "Last remaining subvolume:"
> > +_scratch_unmount
> > +
> > +# now mount the rootfs
> > +_scratch_mount
> > +# Delete the subvol2
> > +_delete_and_list subvol2 "All subvolumes removed."
> > +_scratch_unmount
> > +
> > +# success, all done
> > +status=0
> > +exit
> > diff --git a/tests/btrfs/203.out b/tests/btrfs/203.out
> > new file mode 100644
> > index 00000000..3301852b
> > --- /dev/null
> > +++ b/tests/btrfs/203.out
> > @@ -0,0 +1,17 @@
> > +QA output created by 203
> > +Create subvolume 'SCRATCH_MNT/subvol1'
> > +Create subvolume 'SCRATCH_MNT/subvol2'
> > +Create subvolume 'SCRATCH_MNT/subvol3'
> > +Current subvolume ids:
> > +subvol1
> > +subvol2
> > +subvol3
> > +Delete subvolume (no-commit): 'SCRATCH_MNT/subvol1'
> > +After deleting one subvolume:
> > +subvol2
> > +subvol3
> > +Delete subvolume (no-commit): 'SCRATCH_MNT/subvol3'
> > +Last remaining subvolume:
> > +subvol2
> > +Delete subvolume (no-commit): 'SCRATCH_MNT/subvol2'
> > +All subvolumes removed.
> > diff --git a/tests/btrfs/group b/tests/btrfs/group
> > index 79f85e97..e7744217 100644
> > --- a/tests/btrfs/group
> > +++ b/tests/btrfs/group
> > @@ -204,3 +204,4 @@
> >  200 auto quick send clone
> >  201 auto quick punch log
> >  202 auto quick subvol snapshot
> > +203 auto quick subvol
> > -- 
> > 2.25.0
> > 

[-- Attachment #2: 0001-btrfs-Test-subvolume-delete-subvolid-feature.patch --]
[-- Type: text/x-patch, Size: 4671 bytes --]

From 2541e8ef08d45030f97073ef1e5bc9196ef22e4d Mon Sep 17 00:00:00 2001
From: Marcos Paulo de Souza <mpdesouza@suse.com>
Date: Sun, 26 Jan 2020 23:44:22 -0300
Subject: [PATCHv4] btrfs: Test subvolume delete --subvolid feature

Now btrfs can delete subvolumes based in ther subvolume id. This makes
easy for the user willing to delete a subvolume that cannot be accessed
by the mount point, since btrfs allows to mount a specific subvolume and
hiding the other from the mount point.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
---
Changes from v3:
* Changes test 203 -> 207, since other tests were merged
* The first patch was merged, so remove it from sending again
  [https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/commit/?id=2f9b4039253d3a6f91cb2a22639a243b5a27e110]

Changes from v2:
* Added Reviewed-by from Nikolay to patch 0001
* Changed awk to $AWK_PROG, suggested by Eryu
* Changed _run_btrfs_util_prog to $BTRFS_UTIL_PROG, suggested by Eryu
* Use _scratch_unmount instead of executing umount by hand, sugested by Eryu
* Created a local function to delete and list subvolumes, suggested by Eryu

Changes from v1:
* Added some prints printing what is being tested
* The test now uses the _btrfs_get_subvolid to get subvolumeids instead of using
  plain integers
* New patch expanding the funtionality of _require_btrfs_command, which now
  check for argument of subcommands

 tests/btrfs/207     | 68 +++++++++++++++++++++++++++++++++++++++++++++
 tests/btrfs/207.out | 17 ++++++++++++
 tests/btrfs/group   |  1 +
 3 files changed, 86 insertions(+)
 create mode 100755 tests/btrfs/207
 create mode 100644 tests/btrfs/207.out

diff --git a/tests/btrfs/207 b/tests/btrfs/207
new file mode 100755
index 00000000..bec5baea
--- /dev/null
+++ b/tests/btrfs/207
@@ -0,0 +1,68 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved.
+#
+# FSQA Test No. 207
+#
+# Test subvolume deletion using the subvolume id, even when the subvolume in
+# question is in a different mount space.
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+tmp=/tmp/$$
+status=1	# failure is the default!
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/filter.btrfs
+
+# real QA test starts here
+_supported_fs btrfs
+_supported_os Linux
+_require_scratch
+_require_btrfs_command subvolume delete --subvolid
+
+_scratch_mkfs > /dev/null 2>&1
+_scratch_mount
+
+_delete_and_list()
+{
+	local subvol_name="$1"
+	local msg="$2"
+
+	SUBVOLID=$(_btrfs_get_subvolid $SCRATCH_MNT "$subvol_name")
+	$BTRFS_UTIL_PROG subvolume delete --subvolid $SUBVOLID $SCRATCH_MNT | _filter_scratch
+
+	echo "$msg"
+	$BTRFS_UTIL_PROG subvolume list $SCRATCH_MNT | $AWK_PROG '{ print $NF }'
+}
+
+# Test creating a normal subvolumes
+$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1 | _filter_scratch
+$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol2 | _filter_scratch
+$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol3 | _filter_scratch
+
+echo "Current subvolume ids:"
+$BTRFS_UTIL_PROG subvolume list $SCRATCH_MNT | $AWK_PROG '{ print $NF }'
+
+# Delete the subvolume subvol1, and list the remaining two subvolumes
+_delete_and_list subvol1 "After deleting one subvolume:"
+_scratch_unmount
+
+# Now we mount the subvol2, which makes subvol3 not accessible for this mount
+# point, but we should be able to delete it using it's subvolume id
+$MOUNT_PROG -o subvol=subvol2 $SCRATCH_DEV $SCRATCH_MNT
+_delete_and_list subvol3 "Last remaining subvolume:"
+_scratch_unmount
+
+# now mount the rootfs
+_scratch_mount
+# Delete the subvol2
+_delete_and_list subvol2 "All subvolumes removed."
+_scratch_unmount
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/207.out b/tests/btrfs/207.out
new file mode 100644
index 00000000..e3f7daa4
--- /dev/null
+++ b/tests/btrfs/207.out
@@ -0,0 +1,17 @@
+QA output created by 207
+Create subvolume 'SCRATCH_MNT/subvol1'
+Create subvolume 'SCRATCH_MNT/subvol2'
+Create subvolume 'SCRATCH_MNT/subvol3'
+Current subvolume ids:
+subvol1
+subvol2
+subvol3
+Delete subvolume (no-commit): 'SCRATCH_MNT/subvol1'
+After deleting one subvolume:
+subvol2
+subvol3
+Delete subvolume (no-commit): 'SCRATCH_MNT/subvol3'
+Last remaining subvolume:
+subvol2
+Delete subvolume (no-commit): 'SCRATCH_MNT/subvol2'
+All subvolumes removed.
diff --git a/tests/btrfs/group b/tests/btrfs/group
index e3ad347b..1acf6af7 100644
--- a/tests/btrfs/group
+++ b/tests/btrfs/group
@@ -209,3 +209,4 @@
 204 auto quick punch
 205 auto quick clone compress
 204 auto quick log replay
+207 auto quick subvol
-- 
2.25.0