Commit f64d5ca8 authored by Qu Wenruo's avatar Qu Wenruo Committed by Chris Mason
Browse files

btrfs: delayed_ref: Add new function to record reserved space into delayed ref 



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: default avatarQu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent f695fdce

fs/btrfs/delayed-ref.c

+29 −0
Original line number Diff line number Diff line
@@ -476,6 +476,8 @@ add_delayed_ref_head(struct btrfs_fs_info *fs_info, 
	INIT_LIST_HEAD(&head_ref->ref_list);

	head_ref->processing = 0;

	head_ref->total_ref_mod = count_mod;

	head_ref->qgroup_reserved = 0;

	head_ref->qgroup_ref_root = 0;



	/* Record qgroup extent info if provided */

	if (qrecord) {
@@ -746,6 +748,33 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, 
	return 0;

}



int btrfs_add_delayed_qgroup_reserve(struct btrfs_fs_info *fs_info,

				     struct btrfs_trans_handle *trans,

				     u64 ref_root, u64 bytenr, u64 num_bytes)

{

	struct btrfs_delayed_ref_root *delayed_refs;

	struct btrfs_delayed_ref_head *ref_head;

	int ret = 0;



	if (!fs_info->quota_enabled || !is_fstree(ref_root))

		return 0;



	delayed_refs = &trans->transaction->delayed_refs;



	spin_lock(&delayed_refs->lock);

	ref_head = find_ref_head(&delayed_refs->href_root, bytenr, 0);

	if (!ref_head) {

		ret = -ENOENT;

		goto out;

	}

	WARN_ON(ref_head->qgroup_reserved || ref_head->qgroup_ref_root);

	ref_head->qgroup_ref_root = ref_root;

	ref_head->qgroup_reserved = num_bytes;

out:

	spin_unlock(&delayed_refs->lock);

	return ret;

}



int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,

				struct btrfs_trans_handle *trans,

				u64 bytenr, u64 num_bytes,

fs/btrfs/delayed-ref.h

+14 −0
Original line number Diff line number Diff line
@@ -112,6 +112,17 @@ struct btrfs_delayed_ref_head { 
	 */

	int total_ref_mod;



	/*

	 * For qgroup reserved space freeing.

	 *

	 * ref_root and reserved will be recorded after

	 * BTRFS_ADD_DELAYED_EXTENT is called.

	 * And will be used to free reserved qgroup space at

	 * run_delayed_refs() time.

	 */

	u64 qgroup_ref_root;

	u64 qgroup_reserved;



	/*

	 * when a new extent is allocated, it is just reserved in memory

	 * The actual extent isn't inserted into the extent allocation tree
@@ -242,6 +253,9 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, 
			       u64 owner, u64 offset, int action,

			       struct btrfs_delayed_extent_op *extent_op,

			       int no_quota);

int btrfs_add_delayed_qgroup_reserve(struct btrfs_fs_info *fs_info,

				     struct btrfs_trans_handle *trans,

				     u64 ref_root, u64 bytenr, u64 num_bytes);

int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,

				struct btrfs_trans_handle *trans,

				u64 bytenr, u64 num_bytes,

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