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