Re: [RFC PATCH v3 9/9] btrfs: test snapshotting encrypted subvol

[Sweet Tea Dorminy <sweettea-kernel@dorminy.me>]

On 8/8/23 13:21, Sweet Tea Dorminy wrote:
> Make sure that snapshots of encrypted data are readable and writeable.
> 
> Test deliberately high-numbered to not conflict.
> 
> Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
> ---
>   tests/btrfs/614     |  76 ++++++++++++++++++++++++++++++
>   tests/btrfs/614.out | 111 ++++++++++++++++++++++++++++++++++++++++++++
>   2 files changed, 187 insertions(+)
>   create mode 100755 tests/btrfs/614
>   create mode 100644 tests/btrfs/614.out
> 
> diff --git a/tests/btrfs/614 b/tests/btrfs/614
> new file mode 100755
> index 00000000..87dd27f9
> --- /dev/null
> +++ b/tests/btrfs/614
> @@ -0,0 +1,76 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2023 Meta Platforms, Inc.  All Rights Reserved.
> +#
> +# FS QA Test 614
> +#
> +# Try taking a snapshot of an encrypted subvolume. Make sure the snapshot is
> +# still readable. Rewrite part of the subvol with the same data; make sure it's
> +# still readable.
> +#
> +. ./common/preamble
> +_begin_fstest auto encrypt
> +
> +# Import common functions.
> +. ./common/encrypt
> +. ./common/filter
> +
> +# real QA test starts here
> +_supported_fs btrfs
> +
> +_require_test
> +_require_scratch
> +_require_scratch_encryption -v 2
> +_require_command "$KEYCTL_PROG" keyctl
> +
> +_scratch_mkfs_encrypted &>> $seqres.full
> +_scratch_mount
> +
> +udir=$SCRATCH_MNT/reference
> +dir=$SCRATCH_MNT/subvol
> +dir2=$SCRATCH_MNT/subvol2
> +$BTRFS_UTIL_PROG subvolume create $dir >> $seqres.full
> +mkdir $udir
> +
> +_set_encpolicy $dir $TEST_KEY_IDENTIFIER
> +_add_enckey $SCRATCH_MNT "$TEST_RAW_KEY"
> +
> +# get files with lots of extents by using backwards writes.
> +for j in `seq 0 50`; do
> +	for i in `seq 20 -1 1`; do
> +		$XFS_IO_PROG -f -d -c "pwrite $(($i * 4096)) 4096" \
> +		$dir/foo-$j >> $seqres.full | _filter_xfs_io
> +		$XFS_IO_PROG -f -d -c "pwrite $(($i * 4096)) 4096" \
> +		$udir/foo-$j >> $seqres.full | _filter_xfs_io
> +	done
> +done
> +
> +$BTRFS_UTIL_PROG subvolume snapshot $dir $dir2 | _filter_scratch
> +
> +_scratch_remount
> +_add_enckey $SCRATCH_MNT "$TEST_RAW_KEY"
> +sleep 30
Just noticed this sleep, will remove it in the next version.