2 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
20 #include <linux/mount.h>
21 #include <linux/magic.h>
22 #include "btrfs-tests.h"
24 #include "../free-space-cache.h"
25 #include "../free-space-tree.h"
26 #include "../transaction.h"
27 #include "../volumes.h"
28 #include "../disk-io.h"
29 #include "../qgroup.h"
31 static struct vfsmount
*test_mnt
= NULL
;
33 static const struct super_operations btrfs_test_super_ops
= {
34 .alloc_inode
= btrfs_alloc_inode
,
35 .destroy_inode
= btrfs_test_destroy_inode
,
38 static struct dentry
*btrfs_test_mount(struct file_system_type
*fs_type
,
39 int flags
, const char *dev_name
,
42 return mount_pseudo(fs_type
, "btrfs_test:", &btrfs_test_super_ops
,
43 NULL
, BTRFS_TEST_MAGIC
);
46 static struct file_system_type test_type
= {
47 .name
= "btrfs_test_fs",
48 .mount
= btrfs_test_mount
,
49 .kill_sb
= kill_anon_super
,
52 struct inode
*btrfs_new_test_inode(void)
54 return new_inode(test_mnt
->mnt_sb
);
57 static int btrfs_init_test_fs(void)
61 ret
= register_filesystem(&test_type
);
63 printk(KERN_ERR
"btrfs: cannot register test file system\n");
67 test_mnt
= kern_mount(&test_type
);
68 if (IS_ERR(test_mnt
)) {
69 printk(KERN_ERR
"btrfs: cannot mount test file system\n");
70 unregister_filesystem(&test_type
);
71 return PTR_ERR(test_mnt
);
76 static void btrfs_destroy_test_fs(void)
78 kern_unmount(test_mnt
);
79 unregister_filesystem(&test_type
);
82 struct btrfs_fs_info
*btrfs_alloc_dummy_fs_info(void)
84 struct btrfs_fs_info
*fs_info
= kzalloc(sizeof(struct btrfs_fs_info
),
89 fs_info
->fs_devices
= kzalloc(sizeof(struct btrfs_fs_devices
),
91 if (!fs_info
->fs_devices
) {
95 fs_info
->super_copy
= kzalloc(sizeof(struct btrfs_super_block
),
97 if (!fs_info
->super_copy
) {
98 kfree(fs_info
->fs_devices
);
103 if (init_srcu_struct(&fs_info
->subvol_srcu
)) {
104 kfree(fs_info
->fs_devices
);
105 kfree(fs_info
->super_copy
);
110 spin_lock_init(&fs_info
->buffer_lock
);
111 spin_lock_init(&fs_info
->qgroup_lock
);
112 spin_lock_init(&fs_info
->qgroup_op_lock
);
113 spin_lock_init(&fs_info
->super_lock
);
114 spin_lock_init(&fs_info
->fs_roots_radix_lock
);
115 spin_lock_init(&fs_info
->tree_mod_seq_lock
);
116 mutex_init(&fs_info
->qgroup_ioctl_lock
);
117 mutex_init(&fs_info
->qgroup_rescan_lock
);
118 rwlock_init(&fs_info
->tree_mod_log_lock
);
119 fs_info
->running_transaction
= NULL
;
120 fs_info
->qgroup_tree
= RB_ROOT
;
121 fs_info
->qgroup_ulist
= NULL
;
122 atomic64_set(&fs_info
->tree_mod_seq
, 0);
123 INIT_LIST_HEAD(&fs_info
->dirty_qgroups
);
124 INIT_LIST_HEAD(&fs_info
->dead_roots
);
125 INIT_LIST_HEAD(&fs_info
->tree_mod_seq_list
);
126 INIT_RADIX_TREE(&fs_info
->buffer_radix
, GFP_ATOMIC
);
127 INIT_RADIX_TREE(&fs_info
->fs_roots_radix
, GFP_ATOMIC
);
128 extent_io_tree_init(&fs_info
->freed_extents
[0], NULL
);
129 extent_io_tree_init(&fs_info
->freed_extents
[1], NULL
);
130 fs_info
->pinned_extents
= &fs_info
->freed_extents
[0];
131 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
, &fs_info
->fs_state
);
133 test_mnt
->mnt_sb
->s_fs_info
= fs_info
;
138 void btrfs_free_dummy_fs_info(struct btrfs_fs_info
*fs_info
)
140 struct radix_tree_iter iter
;
146 if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO
,
147 &fs_info
->fs_state
)))
150 test_mnt
->mnt_sb
->s_fs_info
= NULL
;
152 spin_lock(&fs_info
->buffer_lock
);
153 radix_tree_for_each_slot(slot
, &fs_info
->buffer_radix
, &iter
, 0) {
154 struct extent_buffer
*eb
;
156 eb
= radix_tree_deref_slot_protected(slot
, &fs_info
->buffer_lock
);
159 /* Shouldn't happen but that kind of thinking creates CVE's */
160 if (radix_tree_exception(eb
)) {
161 if (radix_tree_deref_retry(eb
))
162 slot
= radix_tree_iter_retry(&iter
);
165 spin_unlock(&fs_info
->buffer_lock
);
166 free_extent_buffer_stale(eb
);
167 spin_lock(&fs_info
->buffer_lock
);
169 spin_unlock(&fs_info
->buffer_lock
);
171 btrfs_free_qgroup_config(fs_info
);
172 btrfs_free_fs_roots(fs_info
);
173 cleanup_srcu_struct(&fs_info
->subvol_srcu
);
174 kfree(fs_info
->super_copy
);
175 kfree(fs_info
->fs_devices
);
179 void btrfs_free_dummy_root(struct btrfs_root
*root
)
183 /* Will be freed by btrfs_free_fs_roots */
184 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX
, &root
->state
)))
187 free_extent_buffer(root
->node
);
191 struct btrfs_block_group_cache
*
192 btrfs_alloc_dummy_block_group(unsigned long length
, u32 sectorsize
)
194 struct btrfs_block_group_cache
*cache
;
196 cache
= kzalloc(sizeof(*cache
), GFP_KERNEL
);
199 cache
->free_space_ctl
= kzalloc(sizeof(*cache
->free_space_ctl
),
201 if (!cache
->free_space_ctl
) {
206 cache
->key
.objectid
= 0;
207 cache
->key
.offset
= length
;
208 cache
->key
.type
= BTRFS_BLOCK_GROUP_ITEM_KEY
;
209 cache
->sectorsize
= sectorsize
;
210 cache
->full_stripe_len
= sectorsize
;
212 INIT_LIST_HEAD(&cache
->list
);
213 INIT_LIST_HEAD(&cache
->cluster_list
);
214 INIT_LIST_HEAD(&cache
->bg_list
);
215 btrfs_init_free_space_ctl(cache
);
216 mutex_init(&cache
->free_space_lock
);
221 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache
*cache
)
225 __btrfs_remove_free_space_cache(cache
->free_space_ctl
);
226 kfree(cache
->free_space_ctl
);
230 void btrfs_init_dummy_trans(struct btrfs_trans_handle
*trans
)
232 memset(trans
, 0, sizeof(*trans
));
234 INIT_LIST_HEAD(&trans
->qgroup_ref_list
);
235 trans
->type
= __TRANS_DUMMY
;
238 int btrfs_run_sanity_tests(void)
241 u32 sectorsize
, nodesize
;
242 u32 test_sectorsize
[] = {
245 ret
= btrfs_init_test_fs();
248 for (i
= 0; i
< ARRAY_SIZE(test_sectorsize
); i
++) {
249 sectorsize
= test_sectorsize
[i
];
250 for (nodesize
= sectorsize
;
251 nodesize
<= BTRFS_MAX_METADATA_BLOCKSIZE
;
253 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n",
254 sectorsize
, nodesize
);
255 ret
= btrfs_test_free_space_cache(sectorsize
, nodesize
);
258 ret
= btrfs_test_extent_buffer_operations(sectorsize
,
262 ret
= btrfs_test_extent_io(sectorsize
, nodesize
);
265 ret
= btrfs_test_inodes(sectorsize
, nodesize
);
268 ret
= btrfs_test_qgroups(sectorsize
, nodesize
);
271 ret
= btrfs_test_free_space_tree(sectorsize
, nodesize
);
277 btrfs_destroy_test_fs();