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 21 static struct vfsmount *test_mnt = NULL; 22 23 const 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 [TEST_ALLOC_CHUNK_MAP] = "cannot allocate chunk map", 32 [TEST_ALLOC_IO_CONTEXT] = "cannot allocate io context", 33 [TEST_ALLOC_TRANSACTION] = "cannot allocate transaction", 34 }; 35 36 static const struct super_operations btrfs_test_super_ops = { 37 .alloc_inode = btrfs_alloc_inode, 38 .destroy_inode = btrfs_test_destroy_inode, 39 }; 40 41 42 static int btrfs_test_init_fs_context(struct fs_context *fc) 43 { 44 struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC); 45 if (!ctx) 46 return -ENOMEM; 47 ctx->ops = &btrfs_test_super_ops; 48 return 0; 49 } 50 51 static struct file_system_type test_type = { 52 .name = "btrfs_test_fs", 53 .init_fs_context = btrfs_test_init_fs_context, 54 .kill_sb = kill_anon_super, 55 }; 56 57 struct inode *btrfs_new_test_inode(void) 58 { 59 struct inode *inode; 60 61 inode = new_inode(test_mnt->mnt_sb); 62 if (!inode) 63 return NULL; 64 65 inode->i_mode = S_IFREG; 66 btrfs_set_inode_number(BTRFS_I(inode), BTRFS_FIRST_FREE_OBJECTID); 67 inode_init_owner(&nop_mnt_idmap, inode, NULL, S_IFREG); 68 69 return inode; 70 } 71 72 static 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 91 static void btrfs_destroy_test_fs(void) 92 { 93 kern_unmount(test_mnt); 94 unregister_filesystem(&test_type); 95 } 96 97 struct 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(fs_info, &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 } 111 112 static void btrfs_free_dummy_device(struct btrfs_device *dev) 113 { 114 extent_io_tree_release(&dev->alloc_state); 115 kfree(dev); 116 } 117 118 struct 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); 146 147 /* CRC32C csum size. */ 148 fs_info->csum_size = 4; 149 fs_info->csums_per_leaf = BTRFS_MAX_ITEM_SIZE(fs_info) / 150 fs_info->csum_size; 151 set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 152 153 test_mnt->mnt_sb->s_fs_info = fs_info; 154 155 return fs_info; 156 } 157 158 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) 159 { 160 struct radix_tree_iter iter; 161 void **slot; 162 struct btrfs_device *dev, *tmp; 163 164 if (!fs_info) 165 return; 166 167 if (WARN_ON(!btrfs_is_testing(fs_info))) 168 return; 169 170 test_mnt->mnt_sb->s_fs_info = NULL; 171 172 spin_lock(&fs_info->buffer_lock); 173 radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) { 174 struct extent_buffer *eb; 175 176 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock); 177 if (!eb) 178 continue; 179 /* Shouldn't happen but that kind of thinking creates CVE's */ 180 if (radix_tree_exception(eb)) { 181 if (radix_tree_deref_retry(eb)) 182 slot = radix_tree_iter_retry(&iter); 183 continue; 184 } 185 slot = radix_tree_iter_resume(slot, &iter); 186 spin_unlock(&fs_info->buffer_lock); 187 free_extent_buffer_stale(eb); 188 spin_lock(&fs_info->buffer_lock); 189 } 190 spin_unlock(&fs_info->buffer_lock); 191 192 btrfs_mapping_tree_free(fs_info); 193 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, 194 dev_list) { 195 btrfs_free_dummy_device(dev); 196 } 197 btrfs_free_qgroup_config(fs_info); 198 btrfs_free_fs_roots(fs_info); 199 kfree(fs_info->super_copy); 200 btrfs_check_leaked_roots(fs_info); 201 btrfs_extent_buffer_leak_debug_check(fs_info); 202 kfree(fs_info->fs_devices); 203 kfree(fs_info); 204 } 205 206 void btrfs_free_dummy_root(struct btrfs_root *root) 207 { 208 if (IS_ERR_OR_NULL(root)) 209 return; 210 /* Will be freed by btrfs_free_fs_roots */ 211 if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state))) 212 return; 213 btrfs_global_root_delete(root); 214 btrfs_put_root(root); 215 } 216 217 struct btrfs_block_group * 218 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, 219 unsigned long length) 220 { 221 struct btrfs_block_group *cache; 222 223 cache = kzalloc(sizeof(*cache), GFP_KERNEL); 224 if (!cache) 225 return NULL; 226 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl), 227 GFP_KERNEL); 228 if (!cache->free_space_ctl) { 229 kfree(cache); 230 return NULL; 231 } 232 233 cache->start = 0; 234 cache->length = length; 235 cache->full_stripe_len = fs_info->sectorsize; 236 cache->fs_info = fs_info; 237 238 INIT_LIST_HEAD(&cache->list); 239 INIT_LIST_HEAD(&cache->cluster_list); 240 INIT_LIST_HEAD(&cache->bg_list); 241 btrfs_init_free_space_ctl(cache, cache->free_space_ctl); 242 mutex_init(&cache->free_space_lock); 243 244 return cache; 245 } 246 247 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) 248 { 249 if (!cache) 250 return; 251 btrfs_remove_free_space_cache(cache); 252 kfree(cache->free_space_ctl); 253 kfree(cache); 254 } 255 256 void btrfs_init_dummy_transaction(struct btrfs_transaction *trans, struct btrfs_fs_info *fs_info) 257 { 258 memset(trans, 0, sizeof(*trans)); 259 trans->fs_info = fs_info; 260 xa_init(&trans->delayed_refs.head_refs); 261 xa_init(&trans->delayed_refs.dirty_extents); 262 spin_lock_init(&trans->delayed_refs.lock); 263 } 264 265 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans, 266 struct btrfs_fs_info *fs_info) 267 { 268 memset(trans, 0, sizeof(*trans)); 269 trans->transid = 1; 270 trans->type = __TRANS_DUMMY; 271 trans->fs_info = fs_info; 272 } 273 274 int btrfs_run_sanity_tests(void) 275 { 276 int ret, i; 277 u32 sectorsize, nodesize; 278 u32 test_sectorsize[] = { 279 PAGE_SIZE, 280 }; 281 ret = btrfs_init_test_fs(); 282 if (ret) 283 return ret; 284 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) { 285 sectorsize = test_sectorsize[i]; 286 for (nodesize = sectorsize; 287 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE; 288 nodesize <<= 1) { 289 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n", 290 sectorsize, nodesize); 291 ret = btrfs_test_free_space_cache(sectorsize, nodesize); 292 if (ret) 293 goto out; 294 ret = btrfs_test_extent_buffer_operations(sectorsize, 295 nodesize); 296 if (ret) 297 goto out; 298 ret = btrfs_test_extent_io(sectorsize, nodesize); 299 if (ret) 300 goto out; 301 ret = btrfs_test_inodes(sectorsize, nodesize); 302 if (ret) 303 goto out; 304 ret = btrfs_test_qgroups(sectorsize, nodesize); 305 if (ret) 306 goto out; 307 ret = btrfs_test_free_space_tree(sectorsize, nodesize); 308 if (ret) 309 goto out; 310 ret = btrfs_test_raid_stripe_tree(sectorsize, nodesize); 311 if (ret) 312 goto out; 313 ret = btrfs_test_delayed_refs(sectorsize, nodesize); 314 if (ret) 315 goto out; 316 } 317 } 318 ret = btrfs_test_extent_map(); 319 320 out: 321 btrfs_destroy_test_fs(); 322 return ret; 323 } 324