btrfs: qgroup: Make snapshot accounting work with new extent-oriented
qgroup.
Make snapshot accounting work with new extent-oriented mechanism by
skipping given root in new/old_roots in create_pending_snapshot().
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 3e3793d..c0f18e7 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1295,6 +1295,12 @@
if (pending->error)
goto no_free_objectid;
+ /*
+ * Make qgroup to skip current new snapshot's qgroupid, as it is
+ * accounted by later btrfs_qgroup_inherit().
+ */
+ btrfs_set_skip_qgroup(trans, objectid);
+
btrfs_reloc_pre_snapshot(trans, pending, &to_reserve);
if (to_reserve > 0) {
@@ -1303,7 +1309,7 @@
to_reserve,
BTRFS_RESERVE_NO_FLUSH);
if (pending->error)
- goto no_free_objectid;
+ goto clear_skip_qgroup;
}
key.objectid = objectid;
@@ -1401,25 +1407,6 @@
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
-
- /*
- * We need to flush delayed refs in order to make sure all of our quota
- * operations have been done before we call btrfs_qgroup_inherit.
- */
- ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
- if (ret) {
- btrfs_abort_transaction(trans, root, ret);
- goto fail;
- }
-
- ret = btrfs_qgroup_inherit(trans, fs_info,
- root->root_key.objectid,
- objectid, pending->inherit);
- if (ret) {
- btrfs_abort_transaction(trans, root, ret);
- goto fail;
- }
-
/* see comments in should_cow_block() */
set_bit(BTRFS_ROOT_FORCE_COW, &root->state);
smp_wmb();
@@ -1502,11 +1489,37 @@
goto fail;
}
}
+
+ ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
+
+ /*
+ * account qgroup counters before qgroup_inherit()
+ */
+ ret = btrfs_qgroup_prepare_account_extents(trans, fs_info);
+ if (ret)
+ goto fail;
+ ret = btrfs_qgroup_account_extents(trans, fs_info);
+ if (ret)
+ goto fail;
+ ret = btrfs_qgroup_inherit(trans, fs_info,
+ root->root_key.objectid,
+ objectid, pending->inherit);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
+
fail:
pending->error = ret;
dir_item_existed:
trans->block_rsv = rsv;
trans->bytes_reserved = 0;
+clear_skip_qgroup:
+ btrfs_clear_skip_qgroup(trans);
no_free_objectid:
kfree(new_root_item);
root_item_alloc_fail: