[PATCH v2] fstests: btrfs/246: add test case to make sure btrfs can create compressed inline extent
STALE1862d
From: Qu Wenruo <hidden>
Date: 2021-08-26 05:34:40
Also in:
fstests
Subsystem:
the rest · Maintainer:
Linus Torvalds
Btrfs has the ability to inline small file extents into its metadata,
and such inlined extents can be further compressed if needed.
The new test case is for a regression caused by commit f2165627319f
("btrfs: compression: don't try to compress if we don't have enough
pages").
That commit prevents btrfs from creating compressed inline extents, even
"-o compress,max_inline=2048" is specified, only uncompressed inline
extents can be created.
The test case will make sure that the content of the small file is
consistent between cycle mount, then use "btrfs inspect dump-tree" to
verify the created extent is both inlined and compressed.
Signed-off-by: Qu Wenruo <redacted>
---
Changelog:
v2:
- Also output the sha256sum to make sure the content is consistent
---
tests/btrfs/246 | 53 +++++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/246.out | 5 +++++
2 files changed, 58 insertions(+)
create mode 100755 tests/btrfs/246
create mode 100644 tests/btrfs/246.out
diff --git a/tests/btrfs/246 b/tests/btrfs/246
new file mode 100755
index 00000000..e0d8016f
--- /dev/null
+++ b/tests/btrfs/246@@ -0,0 +1,53 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2021 SUSE Linux Products GmbH. All Rights Reserved. +# +# FS QA Test 246 +# +# Make sure btrfs can create compressed inline extents +# +. ./common/preamble +_begin_fstest auto quick compress + +# Override the default cleanup function. +_cleanup() +{ + cd / + rm -r -f $tmp.* +} + +# Import common functions. +. ./common/filter +# For __populate_find_inode() +. ./common/populate + +# real QA test starts here + +# Modify as appropriate. +_supported_fs btrfs +_require_scratch + +_scratch_mkfs > /dev/null +_scratch_mount -o compress,max_inline=2048 + +# This should create compressed inline extent +$XFS_IO_PROG -f -c "pwrite 0 2048" $SCRATCH_MNT/foobar > /dev/null +ino=$(__populate_find_inode $SCRATCH_MNT/foobar) +echo "sha256sum before mount cycle" +sha256sum $SCRATCH_MNT/foobar | _filter_scratch +_scratch_cycle_mount +echo "sha256sum after mount cycle" +sha256sum $SCRATCH_MNT/foobar | _filter_scratch +_scratch_unmount + +$BTRFS_UTIL_PROG inspect dump-tree -t 5 $SCRATCH_DEV | \ + grep "($ino EXTENT_DATA 0" -A2 > $tmp.dump-tree +echo "dump tree result for ino $ino:" >> $seqres.full +cat $tmp.dump-tree >> $seqres.full + +grep -q "inline extent" $tmp.dump-tree || echo "no inline extent found" +grep -q "compression 1" $tmp.dump-tree || echo "no compressed extent found" + +# success, all done +status=0 +exit
diff --git a/tests/btrfs/246.out b/tests/btrfs/246.out
new file mode 100644
index 00000000..3908cc50
--- /dev/null
+++ b/tests/btrfs/246.out@@ -0,0 +1,5 @@ +QA output created by 246 +sha256sum before mount cycle +0ca3bfdeda1ef5036bfa5dad078a9f15724e79cf296bd4388cf786bfaf4195d0 SCRATCH_MNT/foobar +sha256sum after mount cycle +0ca3bfdeda1ef5036bfa5dad078a9f15724e79cf296bd4388cf786bfaf4195d0 SCRATCH_MNT/foobar
--
2.31.1