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19#include <linux/slab.h>
20#include "btrfs-tests.h"
21#include "../ctree.h"
22#include "../extent_io.h"
23#include "../disk-io.h"
24
25static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
26{
27 struct btrfs_fs_info *fs_info;
28 struct btrfs_path *path = NULL;
29 struct btrfs_root *root = NULL;
30 struct extent_buffer *eb;
31 struct btrfs_item *item;
32 char *value = "mary had a little lamb";
33 char *split1 = "mary had a little";
34 char *split2 = " lamb";
35 char *split3 = "mary";
36 char *split4 = " had a little";
37 char buf[32];
38 struct btrfs_key key;
39 u32 value_len = strlen(value);
40 int ret = 0;
41
42 test_msg("Running btrfs_split_item tests\n");
43
44 fs_info = btrfs_alloc_dummy_fs_info();
45 if (!fs_info) {
46 test_msg("Could not allocate fs_info\n");
47 return -ENOMEM;
48 }
49
50 root = btrfs_alloc_dummy_root(fs_info, sectorsize, nodesize);
51 if (IS_ERR(root)) {
52 test_msg("Could not allocate root\n");
53 ret = PTR_ERR(root);
54 goto out;
55 }
56
57 path = btrfs_alloc_path();
58 if (!path) {
59 test_msg("Could not allocate path\n");
60 ret = -ENOMEM;
61 goto out;
62 }
63
64 path->nodes[0] = eb = alloc_dummy_extent_buffer(NULL, nodesize,
65 nodesize);
66 if (!eb) {
67 test_msg("Could not allocate dummy buffer\n");
68 ret = -ENOMEM;
69 goto out;
70 }
71 path->slots[0] = 0;
72
73 key.objectid = 0;
74 key.type = BTRFS_EXTENT_CSUM_KEY;
75 key.offset = 0;
76
77 setup_items_for_insert(root, path, &key, &value_len, value_len,
78 value_len + sizeof(struct btrfs_item), 1);
79 item = btrfs_item_nr(0);
80 write_extent_buffer(eb, value, btrfs_item_ptr_offset(eb, 0),
81 value_len);
82
83 key.offset = 3;
84
85
86
87
88
89
90 ret = btrfs_split_item(NULL, root, path, &key, 17);
91 if (ret) {
92 test_msg("Split item failed %d\n", ret);
93 goto out;
94 }
95
96
97
98
99
100 btrfs_item_key_to_cpu(eb, &key, 0);
101 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
102 key.offset != 0) {
103 test_msg("Invalid key at slot 0\n");
104 ret = -EINVAL;
105 goto out;
106 }
107
108 item = btrfs_item_nr(0);
109 if (btrfs_item_size(eb, item) != strlen(split1)) {
110 test_msg("Invalid len in the first split\n");
111 ret = -EINVAL;
112 goto out;
113 }
114
115 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
116 strlen(split1));
117 if (memcmp(buf, split1, strlen(split1))) {
118 test_msg("Data in the buffer doesn't match what it should "
119 "in the first split have='%.*s' want '%s'\n",
120 (int)strlen(split1), buf, split1);
121 ret = -EINVAL;
122 goto out;
123 }
124
125 btrfs_item_key_to_cpu(eb, &key, 1);
126 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
127 key.offset != 3) {
128 test_msg("Invalid key at slot 1\n");
129 ret = -EINVAL;
130 goto out;
131 }
132
133 item = btrfs_item_nr(1);
134 if (btrfs_item_size(eb, item) != strlen(split2)) {
135 test_msg("Invalid len in the second split\n");
136 ret = -EINVAL;
137 goto out;
138 }
139
140 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
141 strlen(split2));
142 if (memcmp(buf, split2, strlen(split2))) {
143 test_msg("Data in the buffer doesn't match what it should "
144 "in the second split\n");
145 ret = -EINVAL;
146 goto out;
147 }
148
149 key.offset = 1;
150
151 ret = btrfs_split_item(NULL, root, path, &key, 4);
152 if (ret) {
153 test_msg("Second split item failed %d\n", ret);
154 goto out;
155 }
156
157 btrfs_item_key_to_cpu(eb, &key, 0);
158 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
159 key.offset != 0) {
160 test_msg("Invalid key at slot 0\n");
161 ret = -EINVAL;
162 goto out;
163 }
164
165 item = btrfs_item_nr(0);
166 if (btrfs_item_size(eb, item) != strlen(split3)) {
167 test_msg("Invalid len in the first split\n");
168 ret = -EINVAL;
169 goto out;
170 }
171
172 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 0),
173 strlen(split3));
174 if (memcmp(buf, split3, strlen(split3))) {
175 test_msg("Data in the buffer doesn't match what it should "
176 "in the third split");
177 ret = -EINVAL;
178 goto out;
179 }
180
181 btrfs_item_key_to_cpu(eb, &key, 1);
182 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
183 key.offset != 1) {
184 test_msg("Invalid key at slot 1\n");
185 ret = -EINVAL;
186 goto out;
187 }
188
189 item = btrfs_item_nr(1);
190 if (btrfs_item_size(eb, item) != strlen(split4)) {
191 test_msg("Invalid len in the second split\n");
192 ret = -EINVAL;
193 goto out;
194 }
195
196 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 1),
197 strlen(split4));
198 if (memcmp(buf, split4, strlen(split4))) {
199 test_msg("Data in the buffer doesn't match what it should "
200 "in the fourth split\n");
201 ret = -EINVAL;
202 goto out;
203 }
204
205 btrfs_item_key_to_cpu(eb, &key, 2);
206 if (key.objectid != 0 || key.type != BTRFS_EXTENT_CSUM_KEY ||
207 key.offset != 3) {
208 test_msg("Invalid key at slot 2\n");
209 ret = -EINVAL;
210 goto out;
211 }
212
213 item = btrfs_item_nr(2);
214 if (btrfs_item_size(eb, item) != strlen(split2)) {
215 test_msg("Invalid len in the second split\n");
216 ret = -EINVAL;
217 goto out;
218 }
219
220 read_extent_buffer(eb, buf, btrfs_item_ptr_offset(eb, 2),
221 strlen(split2));
222 if (memcmp(buf, split2, strlen(split2))) {
223 test_msg("Data in the buffer doesn't match what it should "
224 "in the last chunk\n");
225 ret = -EINVAL;
226 goto out;
227 }
228out:
229 btrfs_free_path(path);
230 btrfs_free_dummy_root(root);
231 btrfs_free_dummy_fs_info(fs_info);
232 return ret;
233}
234
235int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
236{
237 test_msg("Running extent buffer operation tests\n");
238 return test_btrfs_split_item(sectorsize, nodesize);
239}
240
