[PATCH v4 4/6] btrfs: quota rescan helpers

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Many btrfs tests explicitly trigger quota rescan. This is not a
meaningful operation for simple quotas, so we wrap it in a helper that
doesn't blow up quite so badly and lets us run those tests where the
rescan is a qgroup detail.

Signed-off-by: Boris Burkov <boris@xxxxxx>
---
 common/btrfs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/common/btrfs b/common/btrfs
index 8d51bd522..34fa3a157 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -710,6 +710,24 @@ _check_regular_qgroup()
 	_qgroup_mode "$@" | grep -q 'qgroup'
 }
 
+_qgroup_rescan()
+{
+	local mnt=$1
+	local dev=$(findmnt -n -o SOURCE $mnt)
+
+	_check_regular_qgroup $dev || return 1
+	_run_btrfs_util_prog quota rescan -w $mnt
+}
+
+_require_qgroup_rescan()
+{
+	_scratch_mkfs >>$seqres.full 2>&1
+	_scratch_mount
+	_run_btrfs_util_prog quota enable $SCRATCH_MNT
+	$BTRFS_UTIL_PROG quota rescan -w $SCRATCH_MNT ||  _notrun "not able to run quota rescan"
+	_scratch_unmount
+}
+
 _require_scratch_qgroup()
 {
 	_scratch_mkfs >>$seqres.full 2>&1
-- 
2.42.0




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