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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
21static struct vfsmount *test_mnt = NULL;
22
23const 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
33static const struct super_operations btrfs_test_super_ops = {
34 .alloc_inode = btrfs_alloc_inode,
35 .destroy_inode = btrfs_test_destroy_inode,
36};
37
38
39static 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
48static 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
54struct 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(&init_user_ns, inode, NULL, S_IFREG);
68
69 return inode;
70}
71
72static 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
91static void btrfs_destroy_test_fs(void)
92{
93 kern_unmount(test_mnt);
94 unregister_filesystem(&test_type);
95}
96
97struct 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
112static void btrfs_free_dummy_device(struct btrfs_device *dev)
113{
114 extent_io_tree_release(&dev->alloc_state);
115 kfree(dev);
116}
117
118struct 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
153void 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
202void 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
213struct btrfs_block_group *
214btrfs_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
243void 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
252void 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
261int 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
301out:
302 btrfs_destroy_test_fs();
303 return ret;
304}
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/magic.h>
9#include "btrfs-tests.h"
10#include "../ctree.h"
11#include "../free-space-cache.h"
12#include "../free-space-tree.h"
13#include "../transaction.h"
14#include "../volumes.h"
15#include "../disk-io.h"
16#include "../qgroup.h"
17
18static struct vfsmount *test_mnt = NULL;
19
20static const struct super_operations btrfs_test_super_ops = {
21 .alloc_inode = btrfs_alloc_inode,
22 .destroy_inode = btrfs_test_destroy_inode,
23};
24
25static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
26 int flags, const char *dev_name,
27 void *data)
28{
29 return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
30 NULL, BTRFS_TEST_MAGIC);
31}
32
33static struct file_system_type test_type = {
34 .name = "btrfs_test_fs",
35 .mount = btrfs_test_mount,
36 .kill_sb = kill_anon_super,
37};
38
39struct inode *btrfs_new_test_inode(void)
40{
41 return new_inode(test_mnt->mnt_sb);
42}
43
44static int btrfs_init_test_fs(void)
45{
46 int ret;
47
48 ret = register_filesystem(&test_type);
49 if (ret) {
50 printk(KERN_ERR "btrfs: cannot register test file system\n");
51 return ret;
52 }
53
54 test_mnt = kern_mount(&test_type);
55 if (IS_ERR(test_mnt)) {
56 printk(KERN_ERR "btrfs: cannot mount test file system\n");
57 unregister_filesystem(&test_type);
58 return PTR_ERR(test_mnt);
59 }
60 return 0;
61}
62
63static void btrfs_destroy_test_fs(void)
64{
65 kern_unmount(test_mnt);
66 unregister_filesystem(&test_type);
67}
68
69struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
70{
71 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
72 GFP_KERNEL);
73
74 if (!fs_info)
75 return fs_info;
76 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
77 GFP_KERNEL);
78 if (!fs_info->fs_devices) {
79 kfree(fs_info);
80 return NULL;
81 }
82 fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
83 GFP_KERNEL);
84 if (!fs_info->super_copy) {
85 kfree(fs_info->fs_devices);
86 kfree(fs_info);
87 return NULL;
88 }
89
90 fs_info->nodesize = nodesize;
91 fs_info->sectorsize = sectorsize;
92
93 if (init_srcu_struct(&fs_info->subvol_srcu)) {
94 kfree(fs_info->fs_devices);
95 kfree(fs_info->super_copy);
96 kfree(fs_info);
97 return NULL;
98 }
99
100 spin_lock_init(&fs_info->buffer_lock);
101 spin_lock_init(&fs_info->qgroup_lock);
102 spin_lock_init(&fs_info->qgroup_op_lock);
103 spin_lock_init(&fs_info->super_lock);
104 spin_lock_init(&fs_info->fs_roots_radix_lock);
105 spin_lock_init(&fs_info->tree_mod_seq_lock);
106 mutex_init(&fs_info->qgroup_ioctl_lock);
107 mutex_init(&fs_info->qgroup_rescan_lock);
108 rwlock_init(&fs_info->tree_mod_log_lock);
109 fs_info->running_transaction = NULL;
110 fs_info->qgroup_tree = RB_ROOT;
111 fs_info->qgroup_ulist = NULL;
112 atomic64_set(&fs_info->tree_mod_seq, 0);
113 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
114 INIT_LIST_HEAD(&fs_info->dead_roots);
115 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
116 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
117 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
118 extent_io_tree_init(&fs_info->freed_extents[0], NULL);
119 extent_io_tree_init(&fs_info->freed_extents[1], NULL);
120 fs_info->pinned_extents = &fs_info->freed_extents[0];
121 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
122
123 test_mnt->mnt_sb->s_fs_info = fs_info;
124
125 return fs_info;
126}
127
128void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
129{
130 struct radix_tree_iter iter;
131 void **slot;
132
133 if (!fs_info)
134 return;
135
136 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
137 &fs_info->fs_state)))
138 return;
139
140 test_mnt->mnt_sb->s_fs_info = NULL;
141
142 spin_lock(&fs_info->buffer_lock);
143 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
144 struct extent_buffer *eb;
145
146 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
147 if (!eb)
148 continue;
149 /* Shouldn't happen but that kind of thinking creates CVE's */
150 if (radix_tree_exception(eb)) {
151 if (radix_tree_deref_retry(eb))
152 slot = radix_tree_iter_retry(&iter);
153 continue;
154 }
155 slot = radix_tree_iter_resume(slot, &iter);
156 spin_unlock(&fs_info->buffer_lock);
157 free_extent_buffer_stale(eb);
158 spin_lock(&fs_info->buffer_lock);
159 }
160 spin_unlock(&fs_info->buffer_lock);
161
162 btrfs_free_qgroup_config(fs_info);
163 btrfs_free_fs_roots(fs_info);
164 cleanup_srcu_struct(&fs_info->subvol_srcu);
165 kfree(fs_info->super_copy);
166 kfree(fs_info->fs_devices);
167 kfree(fs_info);
168}
169
170void btrfs_free_dummy_root(struct btrfs_root *root)
171{
172 if (!root)
173 return;
174 /* Will be freed by btrfs_free_fs_roots */
175 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
176 return;
177 if (root->node)
178 free_extent_buffer(root->node);
179 kfree(root);
180}
181
182struct btrfs_block_group_cache *
183btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
184 unsigned long length)
185{
186 struct btrfs_block_group_cache *cache;
187
188 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
189 if (!cache)
190 return NULL;
191 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
192 GFP_KERNEL);
193 if (!cache->free_space_ctl) {
194 kfree(cache);
195 return NULL;
196 }
197
198 cache->key.objectid = 0;
199 cache->key.offset = length;
200 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
201 cache->full_stripe_len = fs_info->sectorsize;
202 cache->fs_info = fs_info;
203
204 INIT_LIST_HEAD(&cache->list);
205 INIT_LIST_HEAD(&cache->cluster_list);
206 INIT_LIST_HEAD(&cache->bg_list);
207 btrfs_init_free_space_ctl(cache);
208 mutex_init(&cache->free_space_lock);
209
210 return cache;
211}
212
213void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
214{
215 if (!cache)
216 return;
217 __btrfs_remove_free_space_cache(cache->free_space_ctl);
218 kfree(cache->free_space_ctl);
219 kfree(cache);
220}
221
222void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans)
223{
224 memset(trans, 0, sizeof(*trans));
225 trans->transid = 1;
226 trans->type = __TRANS_DUMMY;
227}
228
229int btrfs_run_sanity_tests(void)
230{
231 int ret, i;
232 u32 sectorsize, nodesize;
233 u32 test_sectorsize[] = {
234 PAGE_SIZE,
235 };
236 ret = btrfs_init_test_fs();
237 if (ret)
238 return ret;
239 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
240 sectorsize = test_sectorsize[i];
241 for (nodesize = sectorsize;
242 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
243 nodesize <<= 1) {
244 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
245 sectorsize, nodesize);
246 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
247 if (ret)
248 goto out;
249 ret = btrfs_test_extent_buffer_operations(sectorsize,
250 nodesize);
251 if (ret)
252 goto out;
253 ret = btrfs_test_extent_io(sectorsize, nodesize);
254 if (ret)
255 goto out;
256 ret = btrfs_test_inodes(sectorsize, nodesize);
257 if (ret)
258 goto out;
259 ret = btrfs_test_qgroups(sectorsize, nodesize);
260 if (ret)
261 goto out;
262 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
263 if (ret)
264 goto out;
265 }
266 }
267 ret = btrfs_test_extent_map();
268
269out:
270 btrfs_destroy_test_fs();
271 return ret;
272}