btrfs: qgroup: Refactor btrfs_qgroup_insert_dirty_extent()

[cascardo/linux.git] / fs / btrfs / qgroup.c

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 13eb6a7..8db2e29 100644 (file)
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1453,10 +1453,9 @@ int btrfs_qgroup_prepare_account_extents(struct btrfs_trans_handle *trans,
        return ret;
 }
 
-struct btrfs_qgroup_extent_record *
-btrfs_qgroup_insert_dirty_extent(struct btrfs_fs_info *fs_info,
-                                struct btrfs_delayed_ref_root *delayed_refs,
-                                struct btrfs_qgroup_extent_record *record)
+int btrfs_qgroup_insert_dirty_extent_nolock(struct btrfs_fs_info *fs_info,
+                               struct btrfs_delayed_ref_root *delayed_refs,
+                               struct btrfs_qgroup_extent_record *record)
 {
        struct rb_node **p = &delayed_refs->dirty_extent_root.rb_node;
        struct rb_node *parent_node = NULL;
@@ -1475,12 +1474,42 @@ btrfs_qgroup_insert_dirty_extent(struct btrfs_fs_info *fs_info,
                else if (bytenr > entry->bytenr)
                        p = &(*p)->rb_right;
                else
-                       return entry;
+                       return 1;
        }
 
        rb_link_node(&record->node, parent_node, p);
        rb_insert_color(&record->node, &delayed_refs->dirty_extent_root);
-       return NULL;
+       return 0;
+}
+
+int btrfs_qgroup_insert_dirty_extent(struct btrfs_trans_handle *trans,
+               struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes,
+               gfp_t gfp_flag)
+{
+       struct btrfs_qgroup_extent_record *record;
+       struct btrfs_delayed_ref_root *delayed_refs;
+       int ret;
+
+       if (!fs_info->quota_enabled || bytenr == 0 || num_bytes == 0)
+               return 0;
+       if (WARN_ON(trans == NULL))
+               return -EINVAL;
+       record = kmalloc(sizeof(*record), gfp_flag);
+       if (!record)
+               return -ENOMEM;
+
+       delayed_refs = &trans->transaction->delayed_refs;
+       record->bytenr = bytenr;
+       record->num_bytes = num_bytes;
+       record->old_roots = NULL;
+
+       spin_lock(&delayed_refs->lock);
+       ret = btrfs_qgroup_insert_dirty_extent_nolock(fs_info, delayed_refs,
+                                                     record);
+       spin_unlock(&delayed_refs->lock);
+       if (ret > 0)
+               kfree(record);
+       return 0;
 }
 
 #define UPDATE_NEW     0