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 unsigned long index; 154 struct extent_buffer *eb; 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 xa_for_each(&fs_info->extent_buffers, index, eb) { 167 free_extent_buffer_stale(eb); 168 } 169 170 btrfs_mapping_tree_free(&fs_info->mapping_tree); 171 list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, 172 dev_list) { 173 btrfs_free_dummy_device(dev); 174 } 175 btrfs_free_qgroup_config(fs_info); 176 btrfs_free_fs_roots(fs_info); 177 kfree(fs_info->super_copy); 178 btrfs_check_leaked_roots(fs_info); 179 btrfs_extent_buffer_leak_debug_check(fs_info); 180 kfree(fs_info->fs_devices); 181 kfree(fs_info); 182 } 183 184 void btrfs_free_dummy_root(struct btrfs_root *root) 185 { 186 if (!root) 187 return; 188 /* Will be freed by btrfs_free_fs_roots */ 189 if (WARN_ON(test_bit(BTRFS_ROOT_REGISTERED, &root->state))) 190 return; 191 btrfs_global_root_delete(root); 192 btrfs_put_root(root); 193 } 194 195 struct btrfs_block_group * 196 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, 197 unsigned long length) 198 { 199 struct btrfs_block_group *cache; 200 201 cache = kzalloc(sizeof(*cache), GFP_KERNEL); 202 if (!cache) 203 return NULL; 204 cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl), 205 GFP_KERNEL); 206 if (!cache->free_space_ctl) { 207 kfree(cache); 208 return NULL; 209 } 210 211 cache->start = 0; 212 cache->length = length; 213 cache->full_stripe_len = fs_info->sectorsize; 214 cache->fs_info = fs_info; 215 216 INIT_LIST_HEAD(&cache->list); 217 INIT_LIST_HEAD(&cache->cluster_list); 218 INIT_LIST_HEAD(&cache->bg_list); 219 btrfs_init_free_space_ctl(cache, cache->free_space_ctl); 220 mutex_init(&cache->free_space_lock); 221 222 return cache; 223 } 224 225 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) 226 { 227 if (!cache) 228 return; 229 __btrfs_remove_free_space_cache(cache->free_space_ctl); 230 kfree(cache->free_space_ctl); 231 kfree(cache); 232 } 233 234 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans, 235 struct btrfs_fs_info *fs_info) 236 { 237 memset(trans, 0, sizeof(*trans)); 238 trans->transid = 1; 239 trans->type = __TRANS_DUMMY; 240 trans->fs_info = fs_info; 241 } 242 243 int btrfs_run_sanity_tests(void) 244 { 245 int ret, i; 246 u32 sectorsize, nodesize; 247 u32 test_sectorsize[] = { 248 PAGE_SIZE, 249 }; 250 ret = btrfs_init_test_fs(); 251 if (ret) 252 return ret; 253 for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) { 254 sectorsize = test_sectorsize[i]; 255 for (nodesize = sectorsize; 256 nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE; 257 nodesize <<= 1) { 258 pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n", 259 sectorsize, nodesize); 260 ret = btrfs_test_free_space_cache(sectorsize, nodesize); 261 if (ret) 262 goto out; 263 ret = btrfs_test_extent_buffer_operations(sectorsize, 264 nodesize); 265 if (ret) 266 goto out; 267 ret = btrfs_test_extent_io(sectorsize, nodesize); 268 if (ret) 269 goto out; 270 ret = btrfs_test_inodes(sectorsize, nodesize); 271 if (ret) 272 goto out; 273 ret = btrfs_test_qgroups(sectorsize, nodesize); 274 if (ret) 275 goto out; 276 ret = btrfs_test_free_space_tree(sectorsize, nodesize); 277 if (ret) 278 goto out; 279 } 280 } 281 ret = btrfs_test_extent_map(); 282 283 out: 284 btrfs_destroy_test_fs(); 285 return ret; 286 } 287