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由 Qu Wenruo 提交于
Add new function btrfs_add_delayed_qgroup_reserve() function to record how much space is reserved for that extent. As btrfs only accounts qgroup at run_delayed_refs() time, so newly allocated extent should keep the reserved space until then. So add needed function with related members to do it. Signed-off-by: NQu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: NChris Mason <clm@fb.com>
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