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 return NULL;
60
61 inode->i_mode = S_IFREG;
62 inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
63 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
64 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
65 BTRFS_I(inode)->location.offset = 0;
66 inode_init_owner(&init_user_ns, inode, NULL, S_IFREG);
67
68 return inode;
69 }
70
btrfs_init_test_fs(void)71 static int btrfs_init_test_fs(void)
72 {
73 int ret;
74
75 ret = register_filesystem(&test_type);
76 if (ret) {
77 printk(KERN_ERR "btrfs: cannot register test file system\n");
78 return ret;
79 }
80
81 test_mnt = kern_mount(&test_type);
82 if (IS_ERR(test_mnt)) {
83 printk(KERN_ERR "btrfs: cannot mount test file system\n");
84 unregister_filesystem(&test_type);
85 return PTR_ERR(test_mnt);
86 }
87 return 0;
88 }
89
btrfs_destroy_test_fs(void)90 static void btrfs_destroy_test_fs(void)
91 {
92 kern_unmount(test_mnt);
93 unregister_filesystem(&test_type);
94 }
95
btrfs_alloc_dummy_device(struct btrfs_fs_info * fs_info)96 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
97 {
98 struct btrfs_device *dev;
99
100 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
101 if (!dev)
102 return ERR_PTR(-ENOMEM);
103
104 extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
105 INIT_LIST_HEAD(&dev->dev_list);
106 list_add(&dev->dev_list, &fs_info->fs_devices->devices);
107
108 return dev;
109 }
110
btrfs_free_dummy_device(struct btrfs_device * dev)111 static void btrfs_free_dummy_device(struct btrfs_device *dev)
112 {
113 extent_io_tree_release(&dev->alloc_state);
114 kfree(dev);
115 }
116
btrfs_alloc_dummy_fs_info(u32 nodesize,u32 sectorsize)117 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
118 {
119 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
120 GFP_KERNEL);
121
122 if (!fs_info)
123 return fs_info;
124 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
125 GFP_KERNEL);
126 if (!fs_info->fs_devices) {
127 kfree(fs_info);
128 return NULL;
129 }
130 INIT_LIST_HEAD(&fs_info->fs_devices->devices);
131
132 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
133 GFP_KERNEL);
134 if (!fs_info->super_copy) {
135 kfree(fs_info->fs_devices);
136 kfree(fs_info);
137 return NULL;
138 }
139
140 btrfs_init_fs_info(fs_info);
141
142 fs_info->nodesize = nodesize;
143 fs_info->sectorsize = sectorsize;
144 fs_info->sectorsize_bits = ilog2(sectorsize);
145 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
146
147 test_mnt->mnt_sb->s_fs_info = fs_info;
148
149 return fs_info;
150 }
151
btrfs_free_dummy_fs_info(struct btrfs_fs_info * fs_info)152 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
153 {
154 struct radix_tree_iter iter;
155 void **slot;
156 struct btrfs_device *dev, *tmp;
157
158 if (!fs_info)
159 return;
160
161 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
162 &fs_info->fs_state)))
163 return;
164
165 test_mnt->mnt_sb->s_fs_info = NULL;
166
167 spin_lock(&fs_info->buffer_lock);
168 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
169 struct extent_buffer *eb;
170
171 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
172 if (!eb)
173 continue;
174 /* Shouldn't happen but that kind of thinking creates CVE's */
175 if (radix_tree_exception(eb)) {
176 if (radix_tree_deref_retry(eb))
177 slot = radix_tree_iter_retry(&iter);
178 continue;
179 }
180 slot = radix_tree_iter_resume(slot, &iter);
181 spin_unlock(&fs_info->buffer_lock);
182 free_extent_buffer_stale(eb);
183 spin_lock(&fs_info->buffer_lock);
184 }
185 spin_unlock(&fs_info->buffer_lock);
186
187 btrfs_mapping_tree_free(&fs_info->mapping_tree);
188 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
189 dev_list) {
190 btrfs_free_dummy_device(dev);
191 }
192 btrfs_free_qgroup_config(fs_info);
193 btrfs_free_fs_roots(fs_info);
194 kfree(fs_info->super_copy);
195 btrfs_check_leaked_roots(fs_info);
196 btrfs_extent_buffer_leak_debug_check(fs_info);
197 kfree(fs_info->fs_devices);
198 kfree(fs_info);
199 }
200
btrfs_free_dummy_root(struct btrfs_root * root)201 void btrfs_free_dummy_root(struct btrfs_root *root)
202 {
203 if (IS_ERR_OR_NULL(root))
204 return;
205 /* Will be freed by btrfs_free_fs_roots */
206 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
207 return;
208 btrfs_global_root_delete(root);
209 btrfs_put_root(root);
210 }
211
212 struct btrfs_block_group *
btrfs_alloc_dummy_block_group(struct btrfs_fs_info * fs_info,unsigned long length)213 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
214 unsigned long length)
215 {
216 struct btrfs_block_group *cache;
217
218 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
219 if (!cache)
220 return NULL;
221 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
222 GFP_KERNEL);
223 if (!cache->free_space_ctl) {
224 kfree(cache);
225 return NULL;
226 }
227
228 cache->start = 0;
229 cache->length = length;
230 cache->full_stripe_len = fs_info->sectorsize;
231 cache->fs_info = fs_info;
232
233 INIT_LIST_HEAD(&cache->list);
234 INIT_LIST_HEAD(&cache->cluster_list);
235 INIT_LIST_HEAD(&cache->bg_list);
236 btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
237 mutex_init(&cache->free_space_lock);
238
239 return cache;
240 }
241
btrfs_free_dummy_block_group(struct btrfs_block_group * cache)242 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
243 {
244 if (!cache)
245 return;
246 btrfs_remove_free_space_cache(cache);
247 kfree(cache->free_space_ctl);
248 kfree(cache);
249 }
250
btrfs_init_dummy_trans(struct btrfs_trans_handle * trans,struct btrfs_fs_info * fs_info)251 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
252 struct btrfs_fs_info *fs_info)
253 {
254 memset(trans, 0, sizeof(*trans));
255 trans->transid = 1;
256 trans->type = __TRANS_DUMMY;
257 trans->fs_info = fs_info;
258 }
259
btrfs_run_sanity_tests(void)260 int btrfs_run_sanity_tests(void)
261 {
262 int ret, i;
263 u32 sectorsize, nodesize;
264 u32 test_sectorsize[] = {
265 PAGE_SIZE,
266 };
267 ret = btrfs_init_test_fs();
268 if (ret)
269 return ret;
270 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
271 sectorsize = test_sectorsize[i];
272 for (nodesize = sectorsize;
273 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
274 nodesize <<= 1) {
275 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
276 sectorsize, nodesize);
277 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
278 if (ret)
279 goto out;
280 ret = btrfs_test_extent_buffer_operations(sectorsize,
281 nodesize);
282 if (ret)
283 goto out;
284 ret = btrfs_test_extent_io(sectorsize, nodesize);
285 if (ret)
286 goto out;
287 ret = btrfs_test_inodes(sectorsize, nodesize);
288 if (ret)
289 goto out;
290 ret = btrfs_test_qgroups(sectorsize, nodesize);
291 if (ret)
292 goto out;
293 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
294 if (ret)
295 goto out;
296 }
297 }
298 ret = btrfs_test_extent_map();
299
300 out:
301 btrfs_destroy_test_fs();
302 return ret;
303 }
304