btrfs: factor out found_extent() for extent allocation (0ab9724b) · Commits · 戴 / test

fs/btrfs/extent-tree.c

+25 −5

Original line number	Diff line number	Diff line
		@@ -3711,6 +3711,30 @@ static void release_block_group(struct btrfs_block_group *block_group,
		btrfs_release_block_group(block_group, delalloc);
		}

		static void found_extent_clustered(struct find_free_extent_ctl *ffe_ctl,
		struct btrfs_key *ins)
		{
		struct btrfs_free_cluster *last_ptr = ffe_ctl->last_ptr;

		if (!ffe_ctl->use_cluster && last_ptr) {
		spin_lock(&last_ptr->lock);
		last_ptr->window_start = ins->objectid;
		spin_unlock(&last_ptr->lock);
		}
		}

		static void found_extent(struct find_free_extent_ctl *ffe_ctl,
		struct btrfs_key *ins)
		{
		switch (ffe_ctl->policy) {
		case BTRFS_EXTENT_ALLOC_CLUSTERED:
		found_extent_clustered(ffe_ctl, ins);
		break;
		default:
		BUG();
		}
		}

		/*
		* Return >0 means caller needs to re-search for free extent
		* Return 0 means we have the needed free extent.
		@@ -3737,11 +3761,7 @@ static int find_free_extent_update_loop(struct btrfs_fs_info *fs_info,
		return 1;

		if (ins->objectid) {
		if (!use_cluster && last_ptr) {
		spin_lock(&last_ptr->lock);
		last_ptr->window_start = ins->objectid;
		spin_unlock(&last_ptr->lock);
		}
		found_extent(ffe_ctl, ins);
		return 0;
		}