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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2013 Fusion IO. All rights reserved.
*/
#include <linux/slab.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../extent_io.h"
#include "../disk-io.h"
#include "../accessors.h"
static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info;
struct btrfs_path *path = NULL;
struct btrfs_root *root = NULL;
struct extent_buffer *eb;
char *value = "mary had a little lamb";
char *split1 = "mary had a little";
char *split2 = " lamb";
char *split3 = "mary";
char *split4 = " had a little";
char buf[32];
struct btrfs_key key;
u32 value_len = strlen(value);
int ret = 0;
test_msg("running btrfs_split_item tests");
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(root);
goto out;
}
path = btrfs_alloc_path();
if (!path) {
test_std_err(TEST_ALLOC_PATH);
ret = -ENOMEM;
goto out;
}
eb = alloc_dummy_extent_buffer(fs_info, nodesize);
path->nodes[0] = eb;
if (!eb) {
test_std_err(TEST_ALLOC_EXTENT_BUFFER);
ret = -ENOMEM;
goto out;
}
path->slots[0] = 0;
key.objectid = 0;
key.type = BTRFS_EXTENT_CSUM_KEY;
key.offset = 0;
btrfs_setup_item_for_insert(root, path, &key, value_len);
write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
value_len);
key.offset = 3;
/*
* Passing NULL trans here should be safe because we have plenty of
* space in this leaf to split the item without having to split the
* leaf.
*/
ret = btrfs_split_item(NULL, root, path, &key, 17);
if (ret) {
test_err("split item failed %d", ret);
goto out;
}
/*
* Read the first slot, it should have the original key and contain only
* 'mary had a little'
*/
btrfs_item_key_to_cpu(eb, &key, 0);
if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
key.offset != 0) {
test_err("invalid key at slot 0");
ret = -EINVAL;
goto out;
}
if (btrfs_item_size(eb, 0) != strlen(split1)) {
test_err("invalid len in the first split");
ret = -EINVAL;
goto out;
}
read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
strlen(split1));
if (memcmp(buf, split1, strlen(split1))) {
test_err(
"data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'",
(int)strlen(split1), buf, split1);
ret = -EINVAL;
goto out;
}
btrfs_item_key_to_cpu(eb, &key, 1);
if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
key.offset != 3) {
test_err("invalid key at slot 1");
ret = -EINVAL;
goto out;
}
if (btrfs_item_size(eb, 1) != strlen(split2)) {
test_err("invalid len in the second split");
ret = -EINVAL;
goto out;
}
read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
strlen(split2));
if (memcmp(buf, split2, strlen(split2))) {
test_err(
"data in the buffer doesn't match what it should in the second split");
ret = -EINVAL;
goto out;
}
key.offset = 1;
/* Do it again so we test memmoving the other items in the leaf */
ret = btrfs_split_item(NULL, root, path, &key, 4);
if (ret) {
test_err("second split item failed %d", ret);
goto out;
}
btrfs_item_key_to_cpu(eb, &key, 0);
if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
key.offset != 0) {
test_err("invalid key at slot 0");
ret = -EINVAL;
goto out;
}
if (btrfs_item_size(eb, 0) != strlen(split3)) {
test_err("invalid len in the first split");
ret = -EINVAL;
goto out;
}
read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
strlen(split3));
if (memcmp(buf, split3, strlen(split3))) {
test_err(
"data in the buffer doesn't match what it should in the third split");
ret = -EINVAL;
goto out;
}
btrfs_item_key_to_cpu(eb, &key, 1);
if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
key.offset != 1) {
test_err("invalid key at slot 1");
ret = -EINVAL;
goto out;
}
if (btrfs_item_size(eb, 1) != strlen(split4)) {
test_err("invalid len in the second split");
ret = -EINVAL;
goto out;
}
read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
strlen(split4));
if (memcmp(buf, split4, strlen(split4))) {
test_err(
"data in the buffer doesn't match what it should in the fourth split");
ret = -EINVAL;
goto out;
}
btrfs_item_key_to_cpu(eb, &key, 2);
if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
key.offset != 3) {
test_err("invalid key at slot 2");
ret = -EINVAL;
goto out;
}
if (btrfs_item_size(eb, 2) != strlen(split2)) {
test_err("invalid len in the second split");
ret = -EINVAL;
goto out;
}
read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
strlen(split2));
if (memcmp(buf, split2, strlen(split2))) {
test_err(
"data in the buffer doesn't match what it should in the last chunk");
ret = -EINVAL;
goto out;
}
out:
btrfs_free_path(path);
btrfs_free_dummy_root(root);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
{
test_msg("running extent buffer operation tests");
return test_btrfs_split_item(sectorsize, nodesize);
}
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