So far, we can account quota number for data and metadata separately,
but in quota resan, we have not implemented this feature. This patch
make the rescan smart to distingush data and metadata and account them
separately.

Signed-off-by: Dongsheng Yang <yangds.f...@cn.fujitsu.com>
---
 fs/btrfs/qgroup.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 9363fd0..bb98bdd 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2872,6 +2872,8 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct 
btrfs_path *path,
        int new_roots;
        int slot;
        int ret;
+       bool skinny_metadata = btrfs_fs_incompat(fs_info,
+                                                SKINNY_METADATA);
 
        path->leave_spinning = 1;
        mutex_lock(&fs_info->qgroup_rescan_lock);
@@ -2910,14 +2912,27 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, 
struct btrfs_path *path,
        mutex_unlock(&fs_info->qgroup_rescan_lock);
 
        for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) {
+               u8 quota_type = BTRFS_QGROUP_REF_TYPE_DATA;
+               struct btrfs_extent_item *ei;
+               u64 flags;
+
+               ei = btrfs_item_ptr(scratch_leaf, slot, struct 
btrfs_extent_item);
+               flags = btrfs_extent_flags(scratch_leaf, ei);
+
                btrfs_item_key_to_cpu(scratch_leaf, &found, slot);
                if (found.type != BTRFS_EXTENT_ITEM_KEY &&
                    found.type != BTRFS_METADATA_ITEM_KEY)
                        continue;
-               if (found.type == BTRFS_METADATA_ITEM_KEY)
+               if (found.type == BTRFS_METADATA_ITEM_KEY) {
                        num_bytes = fs_info->extent_root->nodesize;
-               else
+                       if (btrfs_fs_incompat(fs_info, QGROUP_TYPE))
+                               quota_type = BTRFS_QGROUP_REF_TYPE_METADATA;
+               } else {
                        num_bytes = found.offset;
+                       if (!skinny_metadata && (flags & 
BTRFS_EXTENT_FLAG_TREE_BLOCK) &&
+                           btrfs_fs_incompat(fs_info, QGROUP_TYPE))
+                               quota_type = BTRFS_QGROUP_REF_TYPE_METADATA;
+               }
 
                ulist_reinit(qgroups);
                ret = btrfs_find_all_roots(NULL, fs_info, found.objectid, 0,
@@ -2937,7 +2952,7 @@ qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct 
btrfs_path *path,
                        goto out;
                }
 
-               ret = qgroup_adjust_counters(fs_info, 0, num_bytes, 0, qgroups,
+               ret = qgroup_adjust_counters(fs_info, 0, num_bytes, quota_type, 
qgroups,
                                             seq, 0, new_roots, 1);
                if (ret < 0) {
                        spin_unlock(&fs_info->qgroup_lock);
-- 
1.8.4.2

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