mirror of https://gitee.com/openkylin/linux.git
230 lines
5.8 KiB
C
230 lines
5.8 KiB
C
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/*
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* Copyright (C) 2013 Fusion IO. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/slab.h>
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#include "btrfs-tests.h"
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#include "../ctree.h"
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#include "../extent_io.h"
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#include "../disk-io.h"
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static int test_btrfs_split_item(void)
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{
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struct btrfs_path *path;
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struct btrfs_root *root;
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struct extent_buffer *eb;
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struct btrfs_item *item;
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char *value = "mary had a little lamb";
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char *split1 = "mary had a little";
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char *split2 = " lamb";
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char *split3 = "mary";
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char *split4 = " had a little";
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char buf[32];
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struct btrfs_key key;
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u32 value_len = strlen(value);
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int ret = 0;
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test_msg("Running btrfs_split_item tests\n");
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root = btrfs_alloc_dummy_root();
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if (IS_ERR(root)) {
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test_msg("Could not allocate root\n");
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return PTR_ERR(root);
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}
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path = btrfs_alloc_path();
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if (!path) {
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test_msg("Could not allocate path\n");
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kfree(root);
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return -ENOMEM;
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}
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path->nodes[0] = eb = alloc_dummy_extent_buffer(0, 4096);
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if (!eb) {
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test_msg("Could not allocate dummy buffer\n");
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ret = -ENOMEM;
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goto out;
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}
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path->slots[0] = 0;
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key.objectid = 0;
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key.type = BTRFS_EXTENT_CSUM_KEY;
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key.offset = 0;
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setup_items_for_insert(root, path, &key, &value_len, value_len,
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value_len + sizeof(struct btrfs_item), 1);
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item = btrfs_item_nr(0);
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write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
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value_len);
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key.offset = 3;
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/*
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* Passing NULL trans here should be safe because we have plenty of
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* space in this leaf to split the item without having to split the
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* leaf.
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*/
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ret = btrfs_split_item(NULL, root, path, &key, 17);
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if (ret) {
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test_msg("Split item failed %d\n", ret);
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goto out;
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}
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/*
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* Read the first slot, it should have the original key and contain only
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* 'mary had a little'
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*/
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btrfs_item_key_to_cpu(eb, &key, 0);
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if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
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key.offset != 0) {
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test_msg("Invalid key at slot 0\n");
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ret = -EINVAL;
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goto out;
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}
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item = btrfs_item_nr(0);
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if (btrfs_item_size(eb, item) != strlen(split1)) {
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test_msg("Invalid len in the first split\n");
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ret = -EINVAL;
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goto out;
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}
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read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
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strlen(split1));
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if (memcmp(buf, split1, strlen(split1))) {
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test_msg("Data in the buffer doesn't match what it should "
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"in the first split have='%.*s' want '%s'\n",
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(int)strlen(split1), buf, split1);
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ret = -EINVAL;
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goto out;
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}
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btrfs_item_key_to_cpu(eb, &key, 1);
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if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
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key.offset != 3) {
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test_msg("Invalid key at slot 1\n");
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ret = -EINVAL;
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goto out;
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}
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item = btrfs_item_nr(1);
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if (btrfs_item_size(eb, item) != strlen(split2)) {
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test_msg("Invalid len in the second split\n");
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ret = -EINVAL;
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goto out;
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}
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read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
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strlen(split2));
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if (memcmp(buf, split2, strlen(split2))) {
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test_msg("Data in the buffer doesn't match what it should "
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"in the second split\n");
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ret = -EINVAL;
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goto out;
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}
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key.offset = 1;
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/* Do it again so we test memmoving the other items in the leaf */
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ret = btrfs_split_item(NULL, root, path, &key, 4);
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if (ret) {
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test_msg("Second split item failed %d\n", ret);
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goto out;
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}
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btrfs_item_key_to_cpu(eb, &key, 0);
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if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
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key.offset != 0) {
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test_msg("Invalid key at slot 0\n");
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ret = -EINVAL;
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goto out;
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}
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item = btrfs_item_nr(0);
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if (btrfs_item_size(eb, item) != strlen(split3)) {
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test_msg("Invalid len in the first split\n");
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ret = -EINVAL;
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goto out;
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}
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read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
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strlen(split3));
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if (memcmp(buf, split3, strlen(split3))) {
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test_msg("Data in the buffer doesn't match what it should "
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"in the third split");
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ret = -EINVAL;
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goto out;
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}
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btrfs_item_key_to_cpu(eb, &key, 1);
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if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
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key.offset != 1) {
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test_msg("Invalid key at slot 1\n");
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ret = -EINVAL;
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goto out;
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}
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item = btrfs_item_nr(1);
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if (btrfs_item_size(eb, item) != strlen(split4)) {
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test_msg("Invalid len in the second split\n");
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ret = -EINVAL;
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goto out;
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}
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read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
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strlen(split4));
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if (memcmp(buf, split4, strlen(split4))) {
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test_msg("Data in the buffer doesn't match what it should "
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"in the fourth split\n");
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ret = -EINVAL;
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goto out;
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}
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btrfs_item_key_to_cpu(eb, &key, 2);
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if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
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key.offset != 3) {
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test_msg("Invalid key at slot 2\n");
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ret = -EINVAL;
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goto out;
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}
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item = btrfs_item_nr(2);
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if (btrfs_item_size(eb, item) != strlen(split2)) {
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test_msg("Invalid len in the second split\n");
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ret = -EINVAL;
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goto out;
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}
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read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
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strlen(split2));
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if (memcmp(buf, split2, strlen(split2))) {
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test_msg("Data in the buffer doesn't match what it should "
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"in the last chunk\n");
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ret = -EINVAL;
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goto out;
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}
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out:
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btrfs_free_path(path);
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kfree(root);
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return ret;
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}
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int btrfs_test_extent_buffer_operations(void)
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{
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test_msg("Running extent buffer operation tests");
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return test_btrfs_split_item();
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}
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