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_fs_info(u32 nodesize,u32 sectorsize)89 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
90 {
91 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
92 GFP_KERNEL);
93
94 if (!fs_info)
95 return fs_info;
96 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
97 GFP_KERNEL);
98 if (!fs_info->fs_devices) {
99 kfree(fs_info);
100 return NULL;
101 }
102 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
103 GFP_KERNEL);
104 if (!fs_info->super_copy) {
105 kfree(fs_info->fs_devices);
106 kfree(fs_info);
107 return NULL;
108 }
109
110 fs_info->nodesize = nodesize;
111 fs_info->sectorsize = sectorsize;
112
113 if (init_srcu_struct(&fs_info->subvol_srcu)) {
114 kfree(fs_info->fs_devices);
115 kfree(fs_info->super_copy);
116 kfree(fs_info);
117 return NULL;
118 }
119
120 spin_lock_init(&fs_info->buffer_lock);
121 spin_lock_init(&fs_info->qgroup_lock);
122 spin_lock_init(&fs_info->super_lock);
123 spin_lock_init(&fs_info->fs_roots_radix_lock);
124 mutex_init(&fs_info->qgroup_ioctl_lock);
125 mutex_init(&fs_info->qgroup_rescan_lock);
126 rwlock_init(&fs_info->tree_mod_log_lock);
127 fs_info->running_transaction = NULL;
128 fs_info->qgroup_tree = RB_ROOT;
129 fs_info->qgroup_ulist = NULL;
130 atomic64_set(&fs_info->tree_mod_seq, 0);
131 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
132 INIT_LIST_HEAD(&fs_info->dead_roots);
133 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
134 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
135 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
136 extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
137 IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
138 extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
139 IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
140 fs_info->pinned_extents = &fs_info->freed_extents[0];
141 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
142
143 test_mnt->mnt_sb->s_fs_info = fs_info;
144
145 return fs_info;
146 }
147
btrfs_free_dummy_fs_info(struct btrfs_fs_info * fs_info)148 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
149 {
150 struct radix_tree_iter iter;
151 void **slot;
152
153 if (!fs_info)
154 return;
155
156 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
157 &fs_info->fs_state)))
158 return;
159
160 test_mnt->mnt_sb->s_fs_info = NULL;
161
162 spin_lock(&fs_info->buffer_lock);
163 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
164 struct extent_buffer *eb;
165
166 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
167 if (!eb)
168 continue;
169 /* Shouldn't happen but that kind of thinking creates CVE's */
170 if (radix_tree_exception(eb)) {
171 if (radix_tree_deref_retry(eb))
172 slot = radix_tree_iter_retry(&iter);
173 continue;
174 }
175 slot = radix_tree_iter_resume(slot, &iter);
176 spin_unlock(&fs_info->buffer_lock);
177 free_extent_buffer_stale(eb);
178 spin_lock(&fs_info->buffer_lock);
179 }
180 spin_unlock(&fs_info->buffer_lock);
181
182 btrfs_free_qgroup_config(fs_info);
183 btrfs_free_fs_roots(fs_info);
184 cleanup_srcu_struct(&fs_info->subvol_srcu);
185 kfree(fs_info->super_copy);
186 kfree(fs_info->fs_devices);
187 kfree(fs_info);
188 }
189
btrfs_free_dummy_root(struct btrfs_root * root)190 void btrfs_free_dummy_root(struct btrfs_root *root)
191 {
192 if (IS_ERR_OR_NULL(root))
193 return;
194 /* Will be freed by btrfs_free_fs_roots */
195 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
196 return;
197 if (root->node) {
198 /* One for allocate_extent_buffer */
199 free_extent_buffer(root->node);
200 }
201 kfree(root);
202 }
203
204 struct btrfs_block_group_cache *
btrfs_alloc_dummy_block_group(struct btrfs_fs_info * fs_info,unsigned long length)205 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
206 unsigned long length)
207 {
208 struct btrfs_block_group_cache *cache;
209
210 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
211 if (!cache)
212 return NULL;
213 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
214 GFP_KERNEL);
215 if (!cache->free_space_ctl) {
216 kfree(cache);
217 return NULL;
218 }
219
220 cache->key.objectid = 0;
221 cache->key.offset = length;
222 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
223 cache->full_stripe_len = fs_info->sectorsize;
224 cache->fs_info = fs_info;
225
226 INIT_LIST_HEAD(&cache->list);
227 INIT_LIST_HEAD(&cache->cluster_list);
228 INIT_LIST_HEAD(&cache->bg_list);
229 btrfs_init_free_space_ctl(cache);
230 mutex_init(&cache->free_space_lock);
231
232 return cache;
233 }
234
btrfs_free_dummy_block_group(struct btrfs_block_group_cache * cache)235 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
236 {
237 if (!cache)
238 return;
239 __btrfs_remove_free_space_cache(cache->free_space_ctl);
240 kfree(cache->free_space_ctl);
241 kfree(cache);
242 }
243
btrfs_init_dummy_trans(struct btrfs_trans_handle * trans,struct btrfs_fs_info * fs_info)244 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
245 struct btrfs_fs_info *fs_info)
246 {
247 memset(trans, 0, sizeof(*trans));
248 trans->transid = 1;
249 trans->type = __TRANS_DUMMY;
250 trans->fs_info = fs_info;
251 }
252
btrfs_run_sanity_tests(void)253 int btrfs_run_sanity_tests(void)
254 {
255 int ret, i;
256 u32 sectorsize, nodesize;
257 u32 test_sectorsize[] = {
258 PAGE_SIZE,
259 };
260 ret = btrfs_init_test_fs();
261 if (ret)
262 return ret;
263 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
264 sectorsize = test_sectorsize[i];
265 for (nodesize = sectorsize;
266 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
267 nodesize <<= 1) {
268 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
269 sectorsize, nodesize);
270 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
271 if (ret)
272 goto out;
273 ret = btrfs_test_extent_buffer_operations(sectorsize,
274 nodesize);
275 if (ret)
276 goto out;
277 ret = btrfs_test_extent_io(sectorsize, nodesize);
278 if (ret)
279 goto out;
280 ret = btrfs_test_inodes(sectorsize, nodesize);
281 if (ret)
282 goto out;
283 ret = btrfs_test_qgroups(sectorsize, nodesize);
284 if (ret)
285 goto out;
286 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
287 if (ret)
288 goto out;
289 }
290 }
291 ret = btrfs_test_extent_map();
292
293 out:
294 btrfs_destroy_test_fs();
295 return ret;
296 }
297