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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: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Qu Wenruo 2015-09-08 17:08:36 +08:00 committed by Chris Mason
parent f695fdcef8
commit f64d5ca868
2 changed files with 43 additions and 0 deletions
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29
fs/btrfs/delayed-ref.c
View File

@ -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,

14
fs/btrfs/delayed-ref.h
View File

@ -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,