598 lines
15 KiB
C
598 lines
15 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015 Facebook. All rights reserved.
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*/
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#include <linux/types.h>
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#include "btrfs-tests.h"
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#include "../ctree.h"
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#include "../disk-io.h"
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#include "../free-space-tree.h"
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#include "../transaction.h"
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struct free_space_extent {
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u64 start;
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u64 length;
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};
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static int __check_free_space_extents(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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const struct free_space_extent * const extents,
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unsigned int num_extents)
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{
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struct btrfs_free_space_info *info;
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struct btrfs_key key;
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int prev_bit = 0, bit;
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u64 extent_start = 0, offset, end;
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u32 flags, extent_count;
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unsigned int i;
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int ret;
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info = search_free_space_info(trans, fs_info, cache, path, 0);
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if (IS_ERR(info)) {
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test_err("could not find free space info");
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ret = PTR_ERR(info);
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goto out;
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}
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flags = btrfs_free_space_flags(path->nodes[0], info);
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extent_count = btrfs_free_space_extent_count(path->nodes[0], info);
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if (extent_count != num_extents) {
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test_err("extent count is wrong");
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ret = -EINVAL;
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goto out;
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}
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if (flags & BTRFS_FREE_SPACE_USING_BITMAPS) {
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if (path->slots[0] != 0)
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goto invalid;
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end = cache->key.objectid + cache->key.offset;
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i = 0;
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while (++path->slots[0] < btrfs_header_nritems(path->nodes[0])) {
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btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
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if (key.type != BTRFS_FREE_SPACE_BITMAP_KEY)
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goto invalid;
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offset = key.objectid;
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while (offset < key.objectid + key.offset) {
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bit = free_space_test_bit(cache, path, offset);
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if (prev_bit == 0 && bit == 1) {
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extent_start = offset;
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} else if (prev_bit == 1 && bit == 0) {
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if (i >= num_extents)
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goto invalid;
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if (i >= num_extents ||
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extent_start != extents[i].start ||
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offset - extent_start != extents[i].length)
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goto invalid;
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i++;
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}
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prev_bit = bit;
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offset += fs_info->sectorsize;
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}
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}
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if (prev_bit == 1) {
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if (i >= num_extents ||
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extent_start != extents[i].start ||
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end - extent_start != extents[i].length)
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goto invalid;
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i++;
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}
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if (i != num_extents)
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goto invalid;
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} else {
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if (btrfs_header_nritems(path->nodes[0]) != num_extents + 1 ||
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path->slots[0] != 0)
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goto invalid;
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for (i = 0; i < num_extents; i++) {
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path->slots[0]++;
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btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
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if (key.type != BTRFS_FREE_SPACE_EXTENT_KEY ||
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key.objectid != extents[i].start ||
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key.offset != extents[i].length)
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goto invalid;
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}
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}
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ret = 0;
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out:
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btrfs_release_path(path);
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return ret;
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invalid:
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test_err("free space tree is invalid");
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ret = -EINVAL;
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goto out;
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}
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static int check_free_space_extents(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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const struct free_space_extent * const extents,
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unsigned int num_extents)
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{
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struct btrfs_free_space_info *info;
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u32 flags;
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int ret;
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info = search_free_space_info(trans, fs_info, cache, path, 0);
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if (IS_ERR(info)) {
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test_err("could not find free space info");
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btrfs_release_path(path);
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return PTR_ERR(info);
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}
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flags = btrfs_free_space_flags(path->nodes[0], info);
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btrfs_release_path(path);
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ret = __check_free_space_extents(trans, fs_info, cache, path, extents,
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num_extents);
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if (ret)
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return ret;
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/* Flip it to the other format and check that for good measure. */
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if (flags & BTRFS_FREE_SPACE_USING_BITMAPS) {
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ret = convert_free_space_to_extents(trans, cache, path);
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if (ret) {
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test_err("could not convert to extents");
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return ret;
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}
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} else {
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ret = convert_free_space_to_bitmaps(trans, cache, path);
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if (ret) {
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test_err("could not convert to bitmaps");
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return ret;
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}
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}
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return __check_free_space_extents(trans, fs_info, cache, path, extents,
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num_extents);
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}
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static int test_empty_block_group(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid, cache->key.offset},
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};
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_remove_all(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid,
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cache->key.offset);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_remove_beginning(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid + alignment,
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cache->key.offset - alignment},
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};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid, alignment);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_remove_end(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid, cache->key.offset - alignment},
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};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid +
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cache->key.offset - alignment,
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alignment);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_remove_middle(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid, alignment},
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{cache->key.objectid + 2 * alignment,
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cache->key.offset - 2 * alignment},
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};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid + alignment,
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alignment);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_merge_left(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid, 2 * alignment},
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};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid,
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cache->key.offset);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path, cache->key.objectid,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path,
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cache->key.objectid + alignment,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_merge_right(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid + alignment, 2 * alignment},
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};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid,
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cache->key.offset);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path,
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cache->key.objectid + 2 * alignment,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path,
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cache->key.objectid + alignment,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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static int test_merge_both(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info,
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struct btrfs_block_group_cache *cache,
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struct btrfs_path *path,
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u32 alignment)
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{
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const struct free_space_extent extents[] = {
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{cache->key.objectid, 3 * alignment},
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};
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int ret;
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ret = __remove_from_free_space_tree(trans, cache, path,
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cache->key.objectid,
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cache->key.offset);
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if (ret) {
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test_err("could not remove free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path, cache->key.objectid,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path,
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cache->key.objectid + 2 * alignment,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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ret = __add_to_free_space_tree(trans, cache, path,
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cache->key.objectid + alignment,
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alignment);
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if (ret) {
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test_err("could not add free space");
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return ret;
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}
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return check_free_space_extents(trans, fs_info, cache, path,
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extents, ARRAY_SIZE(extents));
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}
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|
|
||
|
|
static int test_merge_none(struct btrfs_trans_handle *trans,
|
||
|
|
struct btrfs_fs_info *fs_info,
|
||
|
|
struct btrfs_block_group_cache *cache,
|
||
|
|
struct btrfs_path *path,
|
||
|
|
u32 alignment)
|
||
|
|
{
|
||
|
|
const struct free_space_extent extents[] = {
|
||
|
|
{cache->key.objectid, alignment},
|
||
|
|
{cache->key.objectid + 2 * alignment, alignment},
|
||
|
|
{cache->key.objectid + 4 * alignment, alignment},
|
||
|
|
};
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = __remove_from_free_space_tree(trans, cache, path,
|
||
|
|
cache->key.objectid,
|
||
|
|
cache->key.offset);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not remove free space");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = __add_to_free_space_tree(trans, cache, path, cache->key.objectid,
|
||
|
|
alignment);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not add free space");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = __add_to_free_space_tree(trans, cache, path,
|
||
|
|
cache->key.objectid + 4 * alignment,
|
||
|
|
alignment);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not add free space");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = __add_to_free_space_tree(trans, cache, path,
|
||
|
|
cache->key.objectid + 2 * alignment,
|
||
|
|
alignment);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not add free space");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return check_free_space_extents(trans, fs_info, cache, path,
|
||
|
|
extents, ARRAY_SIZE(extents));
|
||
|
|
}
|
||
|
|
|
||
|
|
typedef int (*test_func_t)(struct btrfs_trans_handle *,
|
||
|
|
struct btrfs_fs_info *,
|
||
|
|
struct btrfs_block_group_cache *,
|
||
|
|
struct btrfs_path *,
|
||
|
|
u32 alignment);
|
||
|
|
|
||
|
|
static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
|
||
|
|
u32 nodesize, u32 alignment)
|
||
|
|
{
|
||
|
|
struct btrfs_fs_info *fs_info;
|
||
|
|
struct btrfs_root *root = NULL;
|
||
|
|
struct btrfs_block_group_cache *cache = NULL;
|
||
|
|
struct btrfs_trans_handle trans;
|
||
|
|
struct btrfs_path *path = NULL;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
|
||
|
|
if (!fs_info) {
|
||
|
|
test_err("couldn't allocate dummy fs info");
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
root = btrfs_alloc_dummy_root(fs_info);
|
||
|
|
if (IS_ERR(root)) {
|
||
|
|
test_err("couldn't allocate dummy root");
|
||
|
|
ret = PTR_ERR(root);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
btrfs_set_super_compat_ro_flags(root->fs_info->super_copy,
|
||
|
|
BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE);
|
||
|
|
root->fs_info->free_space_root = root;
|
||
|
|
root->fs_info->tree_root = root;
|
||
|
|
|
||
|
|
root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
|
||
|
|
if (IS_ERR(root->node)) {
|
||
|
|
test_err("couldn't allocate dummy buffer");
|
||
|
|
ret = PTR_ERR(root->node);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
btrfs_set_header_level(root->node, 0);
|
||
|
|
btrfs_set_header_nritems(root->node, 0);
|
||
|
|
root->alloc_bytenr += 2 * nodesize;
|
||
|
|
|
||
|
|
cache = btrfs_alloc_dummy_block_group(fs_info, 8 * alignment);
|
||
|
|
if (!cache) {
|
||
|
|
test_err("couldn't allocate dummy block group cache");
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
cache->bitmap_low_thresh = 0;
|
||
|
|
cache->bitmap_high_thresh = (u32)-1;
|
||
|
|
cache->needs_free_space = 1;
|
||
|
|
cache->fs_info = root->fs_info;
|
||
|
|
|
||
|
|
btrfs_init_dummy_trans(&trans, root->fs_info);
|
||
|
|
|
||
|
|
path = btrfs_alloc_path();
|
||
|
|
if (!path) {
|
||
|
|
test_err("couldn't allocate path");
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = add_block_group_free_space(&trans, cache);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not add block group free space");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bitmaps) {
|
||
|
|
ret = convert_free_space_to_bitmaps(&trans, cache, path);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not convert block group to bitmaps");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = test_func(&trans, root->fs_info, cache, path, alignment);
|
||
|
|
if (ret)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
ret = remove_block_group_free_space(&trans, cache);
|
||
|
|
if (ret) {
|
||
|
|
test_err("could not remove block group free space");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (btrfs_header_nritems(root->node) != 0) {
|
||
|
|
test_err("free space tree has leftover items");
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = 0;
|
||
|
|
out:
|
||
|
|
btrfs_free_path(path);
|
||
|
|
btrfs_free_dummy_block_group(cache);
|
||
|
|
btrfs_free_dummy_root(root);
|
||
|
|
btrfs_free_dummy_fs_info(fs_info);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int run_test_both_formats(test_func_t test_func, u32 sectorsize,
|
||
|
|
u32 nodesize, u32 alignment)
|
||
|
|
{
|
||
|
|
int test_ret = 0;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = run_test(test_func, 0, sectorsize, nodesize, alignment);
|
||
|
|
if (ret) {
|
||
|
|
test_err(
|
||
|
|
"%pf failed with extents, sectorsize=%u, nodesize=%u, alignment=%u",
|
||
|
|
test_func, sectorsize, nodesize, alignment);
|
||
|
|
test_ret = ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = run_test(test_func, 1, sectorsize, nodesize, alignment);
|
||
|
|
if (ret) {
|
||
|
|
test_err(
|
||
|
|
"%pf failed with bitmaps, sectorsize=%u, nodesize=%u, alignment=%u",
|
||
|
|
test_func, sectorsize, nodesize, alignment);
|
||
|
|
test_ret = ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return test_ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int btrfs_test_free_space_tree(u32 sectorsize, u32 nodesize)
|
||
|
|
{
|
||
|
|
test_func_t tests[] = {
|
||
|
|
test_empty_block_group,
|
||
|
|
test_remove_all,
|
||
|
|
test_remove_beginning,
|
||
|
|
test_remove_end,
|
||
|
|
test_remove_middle,
|
||
|
|
test_merge_left,
|
||
|
|
test_merge_right,
|
||
|
|
test_merge_both,
|
||
|
|
test_merge_none,
|
||
|
|
};
|
||
|
|
u32 bitmap_alignment;
|
||
|
|
int test_ret = 0;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Align some operations to a page to flush out bugs in the extent
|
||
|
|
* buffer bitmap handling of highmem.
|
||
|
|
*/
|
||
|
|
bitmap_alignment = BTRFS_FREE_SPACE_BITMAP_BITS * PAGE_SIZE;
|
||
|
|
|
||
|
|
test_msg("running free space tree tests");
|
||
|
|
for (i = 0; i < ARRAY_SIZE(tests); i++) {
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = run_test_both_formats(tests[i], sectorsize, nodesize,
|
||
|
|
sectorsize);
|
||
|
|
if (ret)
|
||
|
|
test_ret = ret;
|
||
|
|
|
||
|
|
ret = run_test_both_formats(tests[i], sectorsize, nodesize,
|
||
|
|
bitmap_alignment);
|
||
|
|
if (ret)
|
||
|
|
test_ret = ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return test_ret;
|
||
|
|
}
|