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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
20static struct vfsmount *test_mnt = NULL;
21
22const 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
32static const struct super_operations btrfs_test_super_ops = {
33 .alloc_inode = btrfs_alloc_inode,
34 .destroy_inode = btrfs_test_destroy_inode,
35};
36
37
38static 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
47static 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
53struct 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
64static 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
83static void btrfs_destroy_test_fs(void)
84{
85 kern_unmount(test_mnt);
86 unregister_filesystem(&test_type);
87}
88
89struct 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 spin_lock_init(&fs_info->tree_mod_seq_lock);
125 mutex_init(&fs_info->qgroup_ioctl_lock);
126 mutex_init(&fs_info->qgroup_rescan_lock);
127 rwlock_init(&fs_info->tree_mod_log_lock);
128 fs_info->running_transaction = NULL;
129 fs_info->qgroup_tree = RB_ROOT;
130 fs_info->qgroup_ulist = NULL;
131 atomic64_set(&fs_info->tree_mod_seq, 0);
132 INIT_LIST_HEAD(&fs_info->dirty_qgroups);
133 INIT_LIST_HEAD(&fs_info->dead_roots);
134 INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
135 INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
136 INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
137 extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
138 IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
139 extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
140 IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
141 fs_info->pinned_extents = &fs_info->freed_extents[0];
142 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
143
144 test_mnt->mnt_sb->s_fs_info = fs_info;
145
146 return fs_info;
147}
148
149void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
150{
151 struct radix_tree_iter iter;
152 void **slot;
153
154 if (!fs_info)
155 return;
156
157 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
158 &fs_info->fs_state)))
159 return;
160
161 test_mnt->mnt_sb->s_fs_info = NULL;
162
163 spin_lock(&fs_info->buffer_lock);
164 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
165 struct extent_buffer *eb;
166
167 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
168 if (!eb)
169 continue;
170 /* Shouldn't happen but that kind of thinking creates CVE's */
171 if (radix_tree_exception(eb)) {
172 if (radix_tree_deref_retry(eb))
173 slot = radix_tree_iter_retry(&iter);
174 continue;
175 }
176 slot = radix_tree_iter_resume(slot, &iter);
177 spin_unlock(&fs_info->buffer_lock);
178 free_extent_buffer_stale(eb);
179 spin_lock(&fs_info->buffer_lock);
180 }
181 spin_unlock(&fs_info->buffer_lock);
182
183 btrfs_free_qgroup_config(fs_info);
184 btrfs_free_fs_roots(fs_info);
185 cleanup_srcu_struct(&fs_info->subvol_srcu);
186 kfree(fs_info->super_copy);
187 kfree(fs_info->fs_devices);
188 kfree(fs_info);
189}
190
191void btrfs_free_dummy_root(struct btrfs_root *root)
192{
193 if (!root)
194 return;
195 /* Will be freed by btrfs_free_fs_roots */
196 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
197 return;
198 if (root->node) {
199 /* One for allocate_extent_buffer */
200 free_extent_buffer(root->node);
201 }
202 kfree(root);
203}
204
205struct btrfs_block_group_cache *
206btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
207 unsigned long length)
208{
209 struct btrfs_block_group_cache *cache;
210
211 cache = kzalloc(sizeof(*cache), GFP_KERNEL);
212 if (!cache)
213 return NULL;
214 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
215 GFP_KERNEL);
216 if (!cache->free_space_ctl) {
217 kfree(cache);
218 return NULL;
219 }
220
221 cache->key.objectid = 0;
222 cache->key.offset = length;
223 cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
224 cache->full_stripe_len = fs_info->sectorsize;
225 cache->fs_info = fs_info;
226
227 INIT_LIST_HEAD(&cache->list);
228 INIT_LIST_HEAD(&cache->cluster_list);
229 INIT_LIST_HEAD(&cache->bg_list);
230 btrfs_init_free_space_ctl(cache);
231 mutex_init(&cache->free_space_lock);
232
233 return cache;
234}
235
236void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
237{
238 if (!cache)
239 return;
240 __btrfs_remove_free_space_cache(cache->free_space_ctl);
241 kfree(cache->free_space_ctl);
242 kfree(cache);
243}
244
245void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
246 struct btrfs_fs_info *fs_info)
247{
248 memset(trans, 0, sizeof(*trans));
249 trans->transid = 1;
250 trans->type = __TRANS_DUMMY;
251 trans->fs_info = fs_info;
252}
253
254int btrfs_run_sanity_tests(void)
255{
256 int ret, i;
257 u32 sectorsize, nodesize;
258 u32 test_sectorsize[] = {
259 PAGE_SIZE,
260 };
261 ret = btrfs_init_test_fs();
262 if (ret)
263 return ret;
264 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
265 sectorsize = test_sectorsize[i];
266 for (nodesize = sectorsize;
267 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
268 nodesize <<= 1) {
269 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
270 sectorsize, nodesize);
271 ret = btrfs_test_free_space_cache(sectorsize, nodesize);
272 if (ret)
273 goto out;
274 ret = btrfs_test_extent_buffer_operations(sectorsize,
275 nodesize);
276 if (ret)
277 goto out;
278 ret = btrfs_test_extent_io(sectorsize, nodesize);
279 if (ret)
280 goto out;
281 ret = btrfs_test_inodes(sectorsize, nodesize);
282 if (ret)
283 goto out;
284 ret = btrfs_test_qgroups(sectorsize, nodesize);
285 if (ret)
286 goto out;
287 ret = btrfs_test_free_space_tree(sectorsize, nodesize);
288 if (ret)
289 goto out;
290 }
291 }
292 ret = btrfs_test_extent_map();
293
294out:
295 btrfs_destroy_test_fs();
296 return ret;
297}
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}