btrfs: Use init_delayed_ref_head in add_delayed_ref_head

Use the newly introduced function when initialising the head_ref in
add_delayed_ref_head. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index 227094efd05072eda0bef61a6c18c03237b5184d..5d4c39c072a4a4c1870427b71b55e581e572b459 100644 (file)
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -608,69 +608,14 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
 {
        struct btrfs_delayed_ref_head *existing;
        struct btrfs_delayed_ref_root *delayed_refs;
-       int count_mod = 1;
-       int must_insert_reserved = 0;
        int qrecord_inserted = 0;
 
-       /* If reserved is provided, it must be a data extent. */
-       BUG_ON(!is_data && reserved);
-
-       /*
-        * the head node stores the sum of all the mods, so dropping a ref
-        * should drop the sum in the head node by one.
-        */
-       if (action == BTRFS_UPDATE_DELAYED_HEAD)
-               count_mod = 0;
-       else if (action == BTRFS_DROP_DELAYED_REF)
-               count_mod = -1;
-
-       /*
-        * BTRFS_ADD_DELAYED_EXTENT means that we need to update
-        * the reserved accounting when the extent is finally added, or
-        * if a later modification deletes the delayed ref without ever
-        * inserting the extent into the extent allocation tree.
-        * ref->must_insert_reserved is the flag used to record
-        * that accounting mods are required.
-        *
-        * Once we record must_insert_reserved, switch the action to
-        * BTRFS_ADD_DELAYED_REF because other special casing is not required.
-        */
-       if (action == BTRFS_ADD_DELAYED_EXTENT)
-               must_insert_reserved = 1;
-       else
-               must_insert_reserved = 0;
-
        delayed_refs = &trans->transaction->delayed_refs;
-
-       refcount_set(&head_ref->refs, 1);
-       head_ref->bytenr = bytenr;
-       head_ref->num_bytes = num_bytes;
-       head_ref->ref_mod = count_mod;
-       head_ref->must_insert_reserved = must_insert_reserved;
-       head_ref->is_data = is_data;
-       head_ref->is_system = is_system;
-       head_ref->ref_tree = RB_ROOT;
-       INIT_LIST_HEAD(&head_ref->ref_add_list);
-       RB_CLEAR_NODE(&head_ref->href_node);
-       head_ref->processing = 0;
-       head_ref->total_ref_mod = count_mod;
-       head_ref->qgroup_reserved = 0;
-       head_ref->qgroup_ref_root = 0;
-       spin_lock_init(&head_ref->lock);
-       mutex_init(&head_ref->mutex);
-
+       init_delayed_ref_head(head_ref, qrecord, bytenr, num_bytes, ref_root,
+                             reserved, action, is_data, is_system);
        /* Record qgroup extent info if provided */
        if (qrecord) {
-               if (ref_root && reserved) {
-                       head_ref->qgroup_ref_root = ref_root;
-                       head_ref->qgroup_reserved = reserved;
-               }
-
-               qrecord->bytenr = bytenr;
-               qrecord->num_bytes = num_bytes;
-               qrecord->old_roots = NULL;
-
-               if(btrfs_qgroup_trace_extent_nolock(trans->fs_info,
+               if (btrfs_qgroup_trace_extent_nolock(trans->fs_info,
                                        delayed_refs, qrecord))
                        kfree(qrecord);
                else
@@ -695,7 +640,7 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
        } else {
                if (old_ref_mod)
                        *old_ref_mod = 0;
-               if (is_data && count_mod < 0)
+               if (is_data && head_ref->ref_mod < 0)
                        delayed_refs->pending_csums += num_bytes;
                delayed_refs->num_heads++;
                delayed_refs->num_heads_ready++;