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btrfs: qgroup: Introduce function to convert META_PREALLOC into META_PERTRANS

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For meta_prealloc reservation users, after btrfs_join_transaction()
caller will modify tree so part (or even all) meta_prealloc reservation
should be converted to meta_pertrans until transaction commit time.

This patch introduces a new function,
btrfs_qgroup_convert_reserved_meta() to do this for META_PREALLOC
reservation user.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo
2017-12-12 15:34:31 +08:00
committed by David Sterba
parent e1211d0e89
commit 64cfaef636
2 changed files with 64 additions and 0 deletions
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8
fs/btrfs/qgroup.h
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@@ -332,5 +332,13 @@ static inline void btrfs_qgroup_free_meta_prealloc(struct btrfs_root *root,
*/
void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root);
/*
* Convert @num_bytes of META_PREALLOCATED reservation to META_PERTRANS.
*
* This is called when preallocated meta reservation needs to be used.
* Normally after btrfs_join_transaction() call.
*/
void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes);
void btrfs_qgroup_check_reserved_leak(struct inode *inode);
#endif /* __BTRFS_QGROUP__ */