1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6 #include <linux/fs.h>
7 #include <linux/mount.h>
8 #include <linux/pseudo_fs.h>
9 #include <linux/magic.h>
10 #include "btrfs-tests.h"
11 #include "../ctree.h"
12 #include "../free-space-cache.h"
13 #include "../free-space-tree.h"
14 #include "../transaction.h"
15 #include "../volumes.h"
16 #include "../disk-io.h"
17 #include "../qgroup.h"
18 #include "../block-group.h"
19
20 static struct vfsmount *test_mnt = NULL;
21
22 const char *test_error[] = {
23 [TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
24 [TEST_ALLOC_ROOT] = "cannot allocate root",
25 [TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
26 [TEST_ALLOC_PATH] = "cannot allocate path",
27 [TEST_ALLOC_INODE] = "cannot allocate inode",
28 [TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
29 [TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
30 };
31
32 static const struct super_operations btrfs_test_super_ops = {
33 .alloc_inode = btrfs_alloc_inode,
34 .destroy_inode = btrfs_test_destroy_inode,
35 };
36
37
btrfs_test_init_fs_context(struct fs_context * fc)38 static int btrfs_test_init_fs_context(struct fs_context *fc)
39 {
40 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
41 if (!ctx)
42 return -ENOMEM;
43 ctx->ops = &btrfs_test_super_ops;
44 return 0;
45 }
46
47 static struct file_system_type test_type = {
48 .name = "btrfs_test_fs",
49 .init_fs_context = btrfs_test_init_fs_context,
50 .kill_sb = kill_anon_super,
51 };
52
btrfs_new_test_inode(void)53 struct inode *btrfs_new_test_inode(void)
54 {
55 struct inode *inode;
56
57 inode = new_inode(test_mnt->mnt_sb);
58 if (inode)
59 inode_init_owner(inode, NULL, S_IFREG);
60
61 return inode;
62 }
63
btrfs_init_test_fs(void)64 static int btrfs_init_test_fs(void)
65 {
66 int ret;
67
68 ret = register_filesystem(&test_type);
69 if (ret) {
70 printk(KERN_ERR "btrfs: cannot register test file system\n");
71 return ret;
72 }
73
74 test_mnt = kern_mount(&test_type);
75 if (IS_ERR(test_mnt)) {
76 printk(KERN_ERR "btrfs: cannot mount test file system\n");
77 unregister_filesystem(&test_type);
78 return PTR_ERR(test_mnt);
79 }
80 return 0;
81 }
82
btrfs_destroy_test_fs(void)83 static void btrfs_destroy_test_fs(void)
84 {
85 kern_unmount(test_mnt);
86 unregister_filesystem(&test_type);
87 }
88
btrfs_alloc_dummy_device(struct btrfs_fs_info * fs_info)89 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
90 {
91 struct btrfs_device *dev;
92
93 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
94 if (!dev)
95 return ERR_PTR(-ENOMEM);
96
97 extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
98 INIT_LIST_HEAD(&dev->dev_list);
99 list_add(&dev->dev_list, &fs_info->fs_devices->devices);
100
101 return dev;
102 }
103
btrfs_free_dummy_device(struct btrfs_device * dev)104 static void btrfs_free_dummy_device(struct btrfs_device *dev)
105 {
106 extent_io_tree_release(&dev->alloc_state);
107 kfree(dev);
108 }
109
btrfs_alloc_dummy_fs_info(u32 nodesize,u32 sectorsize)110 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
111 {
112 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
113 GFP_KERNEL);
114
115 if (!fs_info)
116 return fs_info;
117 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
118 GFP_KERNEL);
119 if (!fs_info->fs_devices) {
120 kfree(fs_info);
121 return NULL;
122 }
123 INIT_LIST_HEAD(&fs_info->fs_devices->devices);
124
125 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
126 GFP_KERNEL);
127 if (!fs_info->super_copy) {
128 kfree(fs_info->fs_devices);
129 kfree(fs_info);
130 return NULL;
131 }
132
133 btrfs_init_fs_info(fs_info);
134
135 fs_info->nodesize = nodesize;
136 fs_info->sectorsize = sectorsize;
137 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
138
139 test_mnt->mnt_sb->s_fs_info = fs_info;
140
141 return fs_info;
142 }
143
btrfs_free_dummy_fs_info(struct btrfs_fs_info * fs_info)144 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
145 {
146 struct radix_tree_iter iter;
147 void **slot;
148 struct btrfs_device *dev, *tmp;
149
150 if (!fs_info)
151 return;
152
153 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
154 &fs_info->fs_state)))
155 return;
156
157 test_mnt->mnt_sb->s_fs_info = NULL;
158
159 spin_lock(&fs_info->buffer_lock);
160 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
161 struct extent_buffer *eb;
162
163 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
164 if (!eb)
165 continue;
166 /* Shouldn't happen but that kind of thinking creates CVE's */
167 if (radix_tree_exception(eb)) {
168 if (radix_tree_deref_retry(eb))
169 slot = radix_tree_iter_retry(&iter);
170 continue;
171 }
172 slot = radix_tree_iter_resume(slot, &iter);
173 spin_unlock(&fs_info->buffer_lock);
174 free_extent_buffer_stale(eb);
175 spin_lock(&fs_info->buffer_lock);
176 }
177 spin_unlock(&fs_info->buffer_lock);
178
179 btrfs_mapping_tree_free(&fs_info->mapping_tree);
180 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
181 dev_list) {
182 btrfs_free_dummy_device(dev);
183 }
184 btrfs_free_qgroup_config(fs_info);
185 btrfs_free_fs_roots(fs_info);
186 kfree(fs_info->super_copy);
187 btrfs_check_leaked_roots(fs_info);
188 btrfs_extent_buffer_leak_debug_check(fs_info);
189 kfree(fs_info->fs_devices);
190 kfree(fs_info);
191 }
192
btrfs_free_dummy_root(struct btrfs_root * root)193 void btrfs_free_dummy_root(struct btrfs_root *root)
194 {
195 if (!root)
196 return;
197 /* Will be freed by btrfs_free_fs_roots */
198 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
199 return;
200 btrfs_put_root(root);
201 }
202
203 struct btrfs_block_group *
btrfs_alloc_dummy_block_group(struct btrfs_fs_info * fs_info,unsigned long length)204 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
205 unsigned long length)
206 {
207 struct btrfs_block_group *cache;
208
209 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
210 if (!cache)
211 return NULL;
212 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
213 GFP_KERNEL);
214 if (!cache->free_space_ctl) {
215 kfree(cache);
216 return NULL;
217 }
218
219 cache->start = 0;
220 cache->length = length;
221 cache->full_stripe_len = fs_info->sectorsize;
222 cache->fs_info = fs_info;
223
224 INIT_LIST_HEAD(&cache->list);
225 INIT_LIST_HEAD(&cache->cluster_list);
226 INIT_LIST_HEAD(&cache->bg_list);
227 btrfs_init_free_space_ctl(cache);
228 mutex_init(&cache->free_space_lock);
229
230 return cache;
231 }
232
btrfs_free_dummy_block_group(struct btrfs_block_group * cache)233 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
234 {
235 if (!cache)
236 return;
237 __btrfs_remove_free_space_cache(cache->free_space_ctl);
238 kfree(cache->free_space_ctl);
239 kfree(cache);
240 }
241
btrfs_init_dummy_trans(struct btrfs_trans_handle * trans,struct btrfs_fs_info * fs_info)242 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
243 struct btrfs_fs_info *fs_info)
244 {
245 memset(trans, 0, sizeof(*trans));
246 trans->transid = 1;
247 trans->type = __TRANS_DUMMY;
248 trans->fs_info = fs_info;
249 }
250
btrfs_run_sanity_tests(void)251 int btrfs_run_sanity_tests(void)
252 {
253 int ret, i;
254 u32 sectorsize, nodesize;
255 u32 test_sectorsize[] = {
256 PAGE_SIZE,
257 };
258 ret = btrfs_init_test_fs();
259 if (ret)
260 return ret;
261 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
262 sectorsize = test_sectorsize[i];
263 for (nodesize = sectorsize;
264 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
265 nodesize <<= 1) {
266 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
267 sectorsize, nodesize);
268 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
269 if (ret)
270 goto out;
271 ret = btrfs_test_extent_buffer_operations(sectorsize,
272 nodesize);
273 if (ret)
274 goto out;
275 ret = btrfs_test_extent_io(sectorsize, nodesize);
276 if (ret)
277 goto out;
278 ret = btrfs_test_inodes(sectorsize, nodesize);
279 if (ret)
280 goto out;
281 ret = btrfs_test_qgroups(sectorsize, nodesize);
282 if (ret)
283 goto out;
284 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
285 if (ret)
286 goto out;
287 }
288 }
289 ret = btrfs_test_extent_map();
290
291 out:
292 btrfs_destroy_test_fs();
293 return ret;
294 }
295
