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Commit 8d1a1317 authored by Robin Dong's avatar Robin Dong Committed by Chris Mason
Browse files

btrfs: remove unused function btrfs_insert_some_items()



The function btrfs_insert_some_items() would not be called by any other functions,
so remove it.

Signed-off-by: default avatarRobin Dong <sanbai@taobao.com>
parent 44734ed1
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+0 −143
Original line number Diff line number Diff line
@@ -4401,149 +4401,6 @@ void btrfs_extend_item(struct btrfs_trans_handle *trans,
	}
}

/*
 * Given a key and some data, insert items into the tree.
 * This does all the path init required, making room in the tree if needed.
 * Returns the number of keys that were inserted.
 */
int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path,
			    struct btrfs_key *cpu_key, u32 *data_size,
			    int nr)
{
	struct extent_buffer *leaf;
	struct btrfs_item *item;
	int ret = 0;
	int slot;
	int i;
	u32 nritems;
	u32 total_data = 0;
	u32 total_size = 0;
	unsigned int data_end;
	struct btrfs_disk_key disk_key;
	struct btrfs_key found_key;
	struct btrfs_map_token token;

	btrfs_init_map_token(&token);

	for (i = 0; i < nr; i++) {
		if (total_size + data_size[i] + sizeof(struct btrfs_item) >
		    BTRFS_LEAF_DATA_SIZE(root)) {
			break;
			nr = i;
		}
		total_data += data_size[i];
		total_size += data_size[i] + sizeof(struct btrfs_item);
	}
	BUG_ON(nr == 0);

	ret = btrfs_search_slot(trans, root, cpu_key, path, total_size, 1);
	if (ret == 0)
		return -EEXIST;
	if (ret < 0)
		goto out;

	leaf = path->nodes[0];

	nritems = btrfs_header_nritems(leaf);
	data_end = leaf_data_end(root, leaf);

	if (btrfs_leaf_free_space(root, leaf) < total_size) {
		for (i = nr; i >= 0; i--) {
			total_data -= data_size[i];
			total_size -= data_size[i] + sizeof(struct btrfs_item);
			if (total_size < btrfs_leaf_free_space(root, leaf))
				break;
		}
		nr = i;
	}

	slot = path->slots[0];
	BUG_ON(slot < 0);

	if (slot != nritems) {
		unsigned int old_data = btrfs_item_end_nr(leaf, slot);

		item = btrfs_item_nr(leaf, slot);
		btrfs_item_key_to_cpu(leaf, &found_key, slot);

		/* figure out how many keys we can insert in here */
		total_data = data_size[0];
		for (i = 1; i < nr; i++) {
			if (btrfs_comp_cpu_keys(&found_key, cpu_key + i) <= 0)
				break;
			total_data += data_size[i];
		}
		nr = i;

		if (old_data < data_end) {
			btrfs_print_leaf(root, leaf);
			printk(KERN_CRIT "slot %d old_data %d data_end %d\n",
			       slot, old_data, data_end);
			BUG_ON(1);
		}
		/*
		 * item0..itemN ... dataN.offset..dataN.size .. data0.size
		 */
		/* first correct the data pointers */
		for (i = slot; i < nritems; i++) {
			u32 ioff;

			item = btrfs_item_nr(leaf, i);
			ioff = btrfs_token_item_offset(leaf, item, &token);
			btrfs_set_token_item_offset(leaf, item,
						    ioff - total_data, &token);
		}
		/* shift the items */
		memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + nr),
			      btrfs_item_nr_offset(slot),
			      (nritems - slot) * sizeof(struct btrfs_item));

		/* shift the data */
		memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) +
			      data_end - total_data, btrfs_leaf_data(leaf) +
			      data_end, old_data - data_end);
		data_end = old_data;
	} else {
		/*
		 * this sucks but it has to be done, if we are inserting at
		 * the end of the leaf only insert 1 of the items, since we
		 * have no way of knowing whats on the next leaf and we'd have
		 * to drop our current locks to figure it out
		 */
		nr = 1;
	}

	/* setup the item for the new data */
	for (i = 0; i < nr; i++) {
		btrfs_cpu_key_to_disk(&disk_key, cpu_key + i);
		btrfs_set_item_key(leaf, &disk_key, slot + i);
		item = btrfs_item_nr(leaf, slot + i);
		btrfs_set_token_item_offset(leaf, item,
					    data_end - data_size[i], &token);
		data_end -= data_size[i];
		btrfs_set_token_item_size(leaf, item, data_size[i], &token);
	}
	btrfs_set_header_nritems(leaf, nritems + nr);
	btrfs_mark_buffer_dirty(leaf);

	ret = 0;
	if (slot == 0) {
		btrfs_cpu_key_to_disk(&disk_key, cpu_key);
		fixup_low_keys(trans, root, path, &disk_key, 1);
	}

	if (btrfs_leaf_free_space(root, leaf) < 0) {
		btrfs_print_leaf(root, leaf);
		BUG();
	}
out:
	if (!ret)
		ret = nr;
	return ret;
}

/*
 * this is a helper for btrfs_insert_empty_items, the main goal here is
 * to save stack depth by doing the bulk of the work in a function