1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
6 #include <linux/slab.h>
7 #include "btrfs-tests.h"
9 #include "../extent_io.h"
10 #include "../disk-io.h"
11 #include "../accessors.h"
13 static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
15 struct btrfs_fs_info *fs_info;
16 struct btrfs_path *path = NULL;
17 struct btrfs_root *root = NULL;
18 struct extent_buffer *eb;
19 char *value = "mary had a little lamb";
20 char *split1 = "mary had a little";
21 char *split2 = " lamb";
22 char *split3 = "mary";
23 char *split4 = " had a little";
26 u32 value_len = strlen(value);
29 test_msg("running btrfs_split_item tests");
31 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
33 test_std_err(TEST_ALLOC_FS_INFO);
37 root = btrfs_alloc_dummy_root(fs_info);
39 test_std_err(TEST_ALLOC_ROOT);
44 path = btrfs_alloc_path();
46 test_std_err(TEST_ALLOC_PATH);
51 eb = alloc_dummy_extent_buffer(fs_info, nodesize);
54 test_std_err(TEST_ALLOC_EXTENT_BUFFER);
61 key.type = BTRFS_EXTENT_CSUM_KEY;
65 * Passing a NULL trans handle is fine here, we have a dummy root eb
66 * and the tree is a single node (level 0).
68 btrfs_setup_item_for_insert(NULL, root, path, &key, value_len);
69 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
75 * Passing NULL trans here should be safe because we have plenty of
76 * space in this leaf to split the item without having to split the
79 ret = btrfs_split_item(NULL, root, path, &key, 17);
81 test_err("split item failed %d", ret);
86 * Read the first slot, it should have the original key and contain only
89 btrfs_item_key_to_cpu(eb, &key, 0);
90 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
92 test_err("invalid key at slot 0");
97 if (btrfs_item_size(eb, 0) != strlen(split1)) {
98 test_err("invalid len in the first split");
103 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
105 if (memcmp(buf, split1, strlen(split1))) {
107 "data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'",
108 (int)strlen(split1), buf, split1);
113 btrfs_item_key_to_cpu(eb, &key, 1);
114 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
116 test_err("invalid key at slot 1");
121 if (btrfs_item_size(eb, 1) != strlen(split2)) {
122 test_err("invalid len in the second split");
127 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
129 if (memcmp(buf, split2, strlen(split2))) {
131 "data in the buffer doesn't match what it should in the second split");
137 /* Do it again so we test memmoving the other items in the leaf */
138 ret = btrfs_split_item(NULL, root, path, &key, 4);
140 test_err("second split item failed %d", ret);
144 btrfs_item_key_to_cpu(eb, &key, 0);
145 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
147 test_err("invalid key at slot 0");
152 if (btrfs_item_size(eb, 0) != strlen(split3)) {
153 test_err("invalid len in the first split");
158 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
160 if (memcmp(buf, split3, strlen(split3))) {
162 "data in the buffer doesn't match what it should in the third split");
167 btrfs_item_key_to_cpu(eb, &key, 1);
168 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
170 test_err("invalid key at slot 1");
175 if (btrfs_item_size(eb, 1) != strlen(split4)) {
176 test_err("invalid len in the second split");
181 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
183 if (memcmp(buf, split4, strlen(split4))) {
185 "data in the buffer doesn't match what it should in the fourth split");
190 btrfs_item_key_to_cpu(eb, &key, 2);
191 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
193 test_err("invalid key at slot 2");
198 if (btrfs_item_size(eb, 2) != strlen(split2)) {
199 test_err("invalid len in the second split");
204 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
206 if (memcmp(buf, split2, strlen(split2))) {
208 "data in the buffer doesn't match what it should in the last chunk");
213 btrfs_free_path(path);
214 btrfs_free_dummy_root(root);
215 btrfs_free_dummy_fs_info(fs_info);
219 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
221 test_msg("running extent buffer operation tests");
222 return test_btrfs_split_item(sectorsize, nodesize);