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 #include "../fs.h"
20
21 static struct vfsmount *test_mnt = NULL;
22
23 const char *test_error[] = {
24 [TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
25 [TEST_ALLOC_ROOT] = "cannot allocate root",
26 [TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
27 [TEST_ALLOC_PATH] = "cannot allocate path",
28 [TEST_ALLOC_INODE] = "cannot allocate inode",
29 [TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
30 [TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
31 };
32
33 static const struct super_operations btrfs_test_super_ops = {
34 .alloc_inode = btrfs_alloc_inode,
35 .destroy_inode = btrfs_test_destroy_inode,
36 };
37
38
btrfs_test_init_fs_context(struct fs_context * fc)39 static int btrfs_test_init_fs_context(struct fs_context *fc)
40 {
41 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
42 if (!ctx)
43 return -ENOMEM;
44 ctx->ops = &btrfs_test_super_ops;
45 return 0;
46 }
47
48 static struct file_system_type test_type = {
49 .name = "btrfs_test_fs",
50 .init_fs_context = btrfs_test_init_fs_context,
51 .kill_sb = kill_anon_super,
52 };
53
btrfs_new_test_inode(void)54 struct inode *btrfs_new_test_inode(void)
55 {
56 struct inode *inode;
57
58 inode = new_inode(test_mnt->mnt_sb);
59 if (!inode)
60 return NULL;
61
62 inode->i_mode = S_IFREG;
63 inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
64 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
65 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
66 BTRFS_I(inode)->location.offset = 0;
67 inode_init_owner(&nop_mnt_idmap, inode, NULL, S_IFREG);
68
69 return inode;
70 }
71
btrfs_init_test_fs(void)72 static int btrfs_init_test_fs(void)
73 {
74 int ret;
75
76 ret = register_filesystem(&test_type);
77 if (ret) {
78 printk(KERN_ERR "btrfs: cannot register test file system\n");
79 return ret;
80 }
81
82 test_mnt = kern_mount(&test_type);
83 if (IS_ERR(test_mnt)) {
84 printk(KERN_ERR "btrfs: cannot mount test file system\n");
85 unregister_filesystem(&test_type);
86 return PTR_ERR(test_mnt);
87 }
88 return 0;
89 }
90
btrfs_destroy_test_fs(void)91 static void btrfs_destroy_test_fs(void)
92 {
93 kern_unmount(test_mnt);
94 unregister_filesystem(&test_type);
95 }
96
btrfs_alloc_dummy_device(struct btrfs_fs_info * fs_info)97 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
98 {
99 struct btrfs_device *dev;
100
101 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
102 if (!dev)
103 return ERR_PTR(-ENOMEM);
104
105 extent_io_tree_init(NULL, &dev->alloc_state, 0);
106 INIT_LIST_HEAD(&dev->dev_list);
107 list_add(&dev->dev_list, &fs_info->fs_devices->devices);
108
109 return dev;
110 }
111
btrfs_free_dummy_device(struct btrfs_device * dev)112 static void btrfs_free_dummy_device(struct btrfs_device *dev)
113 {
114 extent_io_tree_release(&dev->alloc_state);
115 kfree(dev);
116 }
117
btrfs_alloc_dummy_fs_info(u32 nodesize,u32 sectorsize)118 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
119 {
120 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
121 GFP_KERNEL);
122
123 if (!fs_info)
124 return fs_info;
125 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
126 GFP_KERNEL);
127 if (!fs_info->fs_devices) {
128 kfree(fs_info);
129 return NULL;
130 }
131 INIT_LIST_HEAD(&fs_info->fs_devices->devices);
132
133 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
134 GFP_KERNEL);
135 if (!fs_info->super_copy) {
136 kfree(fs_info->fs_devices);
137 kfree(fs_info);
138 return NULL;
139 }
140
141 btrfs_init_fs_info(fs_info);
142
143 fs_info->nodesize = nodesize;
144 fs_info->sectorsize = sectorsize;
145 fs_info->sectorsize_bits = ilog2(sectorsize);
146 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
147
148 test_mnt->mnt_sb->s_fs_info = fs_info;
149
150 return fs_info;
151 }
152
btrfs_free_dummy_fs_info(struct btrfs_fs_info * fs_info)153 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
154 {
155 struct radix_tree_iter iter;
156 void **slot;
157 struct btrfs_device *dev, *tmp;
158
159 if (!fs_info)
160 return;
161
162 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
163 &fs_info->fs_state)))
164 return;
165
166 test_mnt->mnt_sb->s_fs_info = NULL;
167
168 spin_lock(&fs_info->buffer_lock);
169 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
170 struct extent_buffer *eb;
171
172 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
173 if (!eb)
174 continue;
175 /* Shouldn't happen but that kind of thinking creates CVE's */
176 if (radix_tree_exception(eb)) {
177 if (radix_tree_deref_retry(eb))
178 slot = radix_tree_iter_retry(&iter);
179 continue;
180 }
181 slot = radix_tree_iter_resume(slot, &iter);
182 spin_unlock(&fs_info->buffer_lock);
183 free_extent_buffer_stale(eb);
184 spin_lock(&fs_info->buffer_lock);
185 }
186 spin_unlock(&fs_info->buffer_lock);
187
188 btrfs_mapping_tree_free(&fs_info->mapping_tree);
189 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
190 dev_list) {
191 btrfs_free_dummy_device(dev);
192 }
193 btrfs_free_qgroup_config(fs_info);
194 btrfs_free_fs_roots(fs_info);
195 kfree(fs_info->super_copy);
196 btrfs_check_leaked_roots(fs_info);
197 btrfs_extent_buffer_leak_debug_check(fs_info);
198 kfree(fs_info->fs_devices);
199 kfree(fs_info);
200 }
201
btrfs_free_dummy_root(struct btrfs_root * root)202 void btrfs_free_dummy_root(struct btrfs_root *root)
203 {
204 if (IS_ERR_OR_NULL(root))
205 return;
206 /* Will be freed by btrfs_free_fs_roots */
207 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
208 return;
209 btrfs_global_root_delete(root);
210 btrfs_put_root(root);
211 }
212
213 struct btrfs_block_group *
btrfs_alloc_dummy_block_group(struct btrfs_fs_info * fs_info,unsigned long length)214 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
215 unsigned long length)
216 {
217 struct btrfs_block_group *cache;
218
219 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
220 if (!cache)
221 return NULL;
222 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
223 GFP_KERNEL);
224 if (!cache->free_space_ctl) {
225 kfree(cache);
226 return NULL;
227 }
228
229 cache->start = 0;
230 cache->length = length;
231 cache->full_stripe_len = fs_info->sectorsize;
232 cache->fs_info = fs_info;
233
234 INIT_LIST_HEAD(&cache->list);
235 INIT_LIST_HEAD(&cache->cluster_list);
236 INIT_LIST_HEAD(&cache->bg_list);
237 btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
238 mutex_init(&cache->free_space_lock);
239
240 return cache;
241 }
242
btrfs_free_dummy_block_group(struct btrfs_block_group * cache)243 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
244 {
245 if (!cache)
246 return;
247 btrfs_remove_free_space_cache(cache);
248 kfree(cache->free_space_ctl);
249 kfree(cache);
250 }
251
btrfs_init_dummy_trans(struct btrfs_trans_handle * trans,struct btrfs_fs_info * fs_info)252 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
253 struct btrfs_fs_info *fs_info)
254 {
255 memset(trans, 0, sizeof(*trans));
256 trans->transid = 1;
257 trans->type = __TRANS_DUMMY;
258 trans->fs_info = fs_info;
259 }
260
btrfs_run_sanity_tests(void)261 int btrfs_run_sanity_tests(void)
262 {
263 int ret, i;
264 u32 sectorsize, nodesize;
265 u32 test_sectorsize[] = {
266 PAGE_SIZE,
267 };
268 ret = btrfs_init_test_fs();
269 if (ret)
270 return ret;
271 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
272 sectorsize = test_sectorsize[i];
273 for (nodesize = sectorsize;
274 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
275 nodesize <<= 1) {
276 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
277 sectorsize, nodesize);
278 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
279 if (ret)
280 goto out;
281 ret = btrfs_test_extent_buffer_operations(sectorsize,
282 nodesize);
283 if (ret)
284 goto out;
285 ret = btrfs_test_extent_io(sectorsize, nodesize);
286 if (ret)
287 goto out;
288 ret = btrfs_test_inodes(sectorsize, nodesize);
289 if (ret)
290 goto out;
291 ret = btrfs_test_qgroups(sectorsize, nodesize);
292 if (ret)
293 goto out;
294 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
295 if (ret)
296 goto out;
297 }
298 }
299 ret = btrfs_test_extent_map();
300
301 out:
302 btrfs_destroy_test_fs();
303 return ret;
304 }
305