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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2015-04-16 16:40:39 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-06-10 09:25:39 -0700 |
| commit | 3b7d00f99c60b31e1cff0efc6b9178eea3696e27 (patch) | |
| tree | 6ad1addc84a6635f3696fbea6bfd54276075d30c /fs/btrfs | |
| parent | 3368d001ba5df44930d986e82b1b497d4da285ba (diff) | |
| download | linux-3b7d00f99c60b31e1cff0efc6b9178eea3696e27.tar.bz2 | |
btrfs: qgroup: Add new function to record old_roots.
Add function btrfs_qgroup_prepare_account_extents() to get old_roots
which are needed for qgroup.
We do it in commit_transaction() and before switch_roots(), and only
search commit_root, so it gives a quite accurate view for previous
transaction.
With old_roots from previous transaction, we can use it to do accurate
account with current transaction.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/qgroup.c | 27 | ||||
| -rw-r--r-- | fs/btrfs/qgroup.h | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 55465d5d788e..7b18fff558ca 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1553,6 +1553,33 @@ int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, return 0; } +int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info) +{ + struct btrfs_qgroup_extent_record *record; + struct btrfs_delayed_ref_root *delayed_refs; + struct rb_node *node; + int ret = 0; + + delayed_refs = &trans->transaction->delayed_refs; + + /* + * No need to do lock, since this function will only be called in + * btrfs_commmit_transaction(). + */ + node = rb_first(&delayed_refs->dirty_extent_root); + while (node) { + record = rb_entry(node, struct btrfs_qgroup_extent_record, + node); + ret = btrfs_find_all_roots(NULL, fs_info, record->bytenr, 0, + &record->old_roots); + if (ret < 0) + break; + node = rb_next(node); + } + return ret; +} + struct btrfs_qgroup_extent_record *btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs, struct btrfs_qgroup_extent_record *record) diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index e58155d0390c..6fe249f078ac 100644 --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -98,6 +98,8 @@ int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, u64 bytenr, u64 num_bytes, enum btrfs_qgroup_operation_type type, int mod_seq); +int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); struct btrfs_qgroup_extent_record *btrfs_qgroup_insert_dirty_extent(struct btrfs_delayed_ref_root *delayed_refs, struct btrfs_qgroup_extent_record *record); |