btrfs: qgroup: Switch to new extent-oriented qgroup mechanism.
Switch from old ref_node based qgroup to extent based qgroup mechanism
for normal operations.
The new mechanism should hugely reduce the overhead of btrfs quota
system, and further more, the codes and logic should be more clean and
easier to maintain.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 3694d57..6f49715 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1967,6 +1967,13 @@
goto scrub_continue;
}
+ /* Reocrd old roots for later qgroup accounting */
+ ret = btrfs_qgroup_prepare_account_extents(trans, root->fs_info);
+ if (ret) {
+ mutex_unlock(&root->fs_info->reloc_mutex);
+ goto scrub_continue;
+ }
+
/*
* make sure none of the code above managed to slip in a
* delayed item
@@ -2008,6 +2015,17 @@
*/
btrfs_free_log_root_tree(trans, root->fs_info);
+ /*
+ * Since fs roots are all committed, we can get a quite accurate
+ * new_roots. So let's do quota accounting.
+ */
+ ret = btrfs_qgroup_account_extents(trans, root->fs_info);
+ if (ret < 0) {
+ mutex_unlock(&root->fs_info->tree_log_mutex);
+ mutex_unlock(&root->fs_info->reloc_mutex);
+ goto scrub_continue;
+ }
+
ret = commit_cowonly_roots(trans, root);
if (ret) {
mutex_unlock(&root->fs_info->tree_log_mutex);