1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6 #include <linux/slab.h>
7 #include "btrfs-tests.h"
8 #include "../ctree.h"
9 #include "../extent_io.h"
10 #include "../disk-io.h"
11
test_btrfs_split_item(u32 sectorsize,u32 nodesize)12 static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
13 {
14 struct btrfs_fs_info *fs_info;
15 struct btrfs_path *path = NULL;
16 struct btrfs_root *root = NULL;
17 struct extent_buffer *eb;
18 struct btrfs_item *item;
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";
24 char buf[32];
25 struct btrfs_key key;
26 u32 value_len = strlen(value);
27 int ret = 0;
28
29 test_msg("running btrfs_split_item tests");
30
31 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
32 if (!fs_info) {
33 test_std_err(TEST_ALLOC_FS_INFO);
34 return -ENOMEM;
35 }
36
37 root = btrfs_alloc_dummy_root(fs_info);
38 if (IS_ERR(root)) {
39 test_std_err(TEST_ALLOC_ROOT);
40 ret = PTR_ERR(root);
41 goto out;
42 }
43
44 path = btrfs_alloc_path();
45 if (!path) {
46 test_std_err(TEST_ALLOC_PATH);
47 ret = -ENOMEM;
48 goto out;
49 }
50
51 path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize);
52 if (!eb) {
53 test_std_err(TEST_ALLOC_EXTENT_BUFFER);
54 ret = -ENOMEM;
55 goto out;
56 }
57 path->slots[0] = 0;
58
59 key.objectid = 0;
60 key.type = BTRFS_EXTENT_CSUM_KEY;
61 key.offset = 0;
62
63 setup_items_for_insert(root, path, &key, &value_len, 1);
64 item = btrfs_item_nr(0);
65 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
66 value_len);
67
68 key.offset = 3;
69
70 /*
71 * Passing NULL trans here should be safe because we have plenty of
72 * space in this leaf to split the item without having to split the
73 * leaf.
74 */
75 ret = btrfs_split_item(NULL, root, path, &key, 17);
76 if (ret) {
77 test_err("split item failed %d", ret);
78 goto out;
79 }
80
81 /*
82 * Read the first slot, it should have the original key and contain only
83 * 'mary had a little'
84 */
85 btrfs_item_key_to_cpu(eb, &key, 0);
86 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
87 key.offset != 0) {
88 test_err("invalid key at slot 0");
89 ret = -EINVAL;
90 goto out;
91 }
92
93 item = btrfs_item_nr(0);
94 if (btrfs_item_size(eb, item) != strlen(split1)) {
95 test_err("invalid len in the first split");
96 ret = -EINVAL;
97 goto out;
98 }
99
100 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
101 strlen(split1));
102 if (memcmp(buf, split1, strlen(split1))) {
103 test_err(
104 "data in the buffer doesn't match what it should in the first split have='%.*s' want '%s'",
105 (int)strlen(split1), buf, split1);
106 ret = -EINVAL;
107 goto out;
108 }
109
110 btrfs_item_key_to_cpu(eb, &key, 1);
111 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
112 key.offset != 3) {
113 test_err("invalid key at slot 1");
114 ret = -EINVAL;
115 goto out;
116 }
117
118 item = btrfs_item_nr(1);
119 if (btrfs_item_size(eb, item) != strlen(split2)) {
120 test_err("invalid len in the second split");
121 ret = -EINVAL;
122 goto out;
123 }
124
125 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
126 strlen(split2));
127 if (memcmp(buf, split2, strlen(split2))) {
128 test_err(
129 "data in the buffer doesn't match what it should in the second split");
130 ret = -EINVAL;
131 goto out;
132 }
133
134 key.offset = 1;
135 /* Do it again so we test memmoving the other items in the leaf */
136 ret = btrfs_split_item(NULL, root, path, &key, 4);
137 if (ret) {
138 test_err("second split item failed %d", ret);
139 goto out;
140 }
141
142 btrfs_item_key_to_cpu(eb, &key, 0);
143 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
144 key.offset != 0) {
145 test_err("invalid key at slot 0");
146 ret = -EINVAL;
147 goto out;
148 }
149
150 item = btrfs_item_nr(0);
151 if (btrfs_item_size(eb, item) != strlen(split3)) {
152 test_err("invalid len in the first split");
153 ret = -EINVAL;
154 goto out;
155 }
156
157 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
158 strlen(split3));
159 if (memcmp(buf, split3, strlen(split3))) {
160 test_err(
161 "data in the buffer doesn't match what it should in the third split");
162 ret = -EINVAL;
163 goto out;
164 }
165
166 btrfs_item_key_to_cpu(eb, &key, 1);
167 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
168 key.offset != 1) {
169 test_err("invalid key at slot 1");
170 ret = -EINVAL;
171 goto out;
172 }
173
174 item = btrfs_item_nr(1);
175 if (btrfs_item_size(eb, item) != strlen(split4)) {
176 test_err("invalid len in the second split");
177 ret = -EINVAL;
178 goto out;
179 }
180
181 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
182 strlen(split4));
183 if (memcmp(buf, split4, strlen(split4))) {
184 test_err(
185 "data in the buffer doesn't match what it should in the fourth split");
186 ret = -EINVAL;
187 goto out;
188 }
189
190 btrfs_item_key_to_cpu(eb, &key, 2);
191 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
192 key.offset != 3) {
193 test_err("invalid key at slot 2");
194 ret = -EINVAL;
195 goto out;
196 }
197
198 item = btrfs_item_nr(2);
199 if (btrfs_item_size(eb, item) != strlen(split2)) {
200 test_err("invalid len in the second split");
201 ret = -EINVAL;
202 goto out;
203 }
204
205 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
206 strlen(split2));
207 if (memcmp(buf, split2, strlen(split2))) {
208 test_err(
209 "data in the buffer doesn't match what it should in the last chunk");
210 ret = -EINVAL;
211 goto out;
212 }
213 out:
214 btrfs_free_path(path);
215 btrfs_free_dummy_root(root);
216 btrfs_free_dummy_fs_info(fs_info);
217 return ret;
218 }
219
btrfs_test_extent_buffer_operations(u32 sectorsize,u32 nodesize)220 int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
221 {
222 test_msg("running extent buffer operation tests");
223 return test_btrfs_split_item(sectorsize, nodesize);
224 }
225
