On 26/01/2023 06:43, Boris Burkov wrote:
Add a new test which checks that size classes in freshly loaded block
groups after a cycle mount match size classes before going down
Depends on the kernel patch:
btrfs: add size class stats to sysfs
Signed-off-by: Boris Burkov <boris@xxxxxx>
---
v2: drop the fixed_by_kernel_commit since the fix is not out past the
btrfs development tree, so the fix is getting rolled in to the original
broken commit. Modified the commit message to note the dependency on the
new sysfs counters.
You can add it as below, it will be helpful to some extent.
Depending on the status of the kernel patch at a later point,
we can update the fixed_by_kernel_commit.
fixed_by_kernel_commit xxxxxxxx "btrfs: add size class stats to sysfs".
tests/btrfs/283 | 49 +++++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/283.out | 2 ++
2 files changed, 51 insertions(+)
create mode 100755 tests/btrfs/283
create mode 100644 tests/btrfs/283.out
diff --git a/tests/btrfs/283 b/tests/btrfs/283
new file mode 100755
index 00000000..b3614786
--- /dev/null
+++ b/tests/btrfs/283
@@ -0,0 +1,49 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2023 Meta Platforms, Inc. All Rights Reserved.
+#
+# FS QA Test 283
+#
+# Test that mounting a btrfs filesystem properly loads block group size classes.
+#
+. ./common/preamble
+_begin_fstest auto quick mount
+
+sysfs_size_classes() {
+ local uuid="$(findmnt -n -o UUID "$SCRATCH_MNT")"
+ cat "/sys/fs/btrfs/$uuid/allocation/data/size_classes"
The kernels without the sysfs patch must fail with not_run.
_require_fs_sysfs() will help here.
Thx.
