fs/btrfs/tests/btrfs-tests.c

   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_put_root(root);
 208 }
 209
 210 struct btrfs_block_group *
 211 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 212                               unsigned long length)
 213 {
 214         struct btrfs_block_group *cache;
 215
 216         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 217         if (!cache)
 218                 return NULL;
 219         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 220                                         GFP_KERNEL);
 221         if (!cache->free_space_ctl) {
 222                 kfree(cache);
 223                 return NULL;
 224         }
 225
 226         cache->start = 0;
 227         cache->length = length;
 228         cache->full_stripe_len = fs_info->sectorsize;
 229         cache->fs_info = fs_info;
 230
 231         INIT_LIST_HEAD(&cache->list);
 232         INIT_LIST_HEAD(&cache->cluster_list);
 233         INIT_LIST_HEAD(&cache->bg_list);
 234         btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
 235         mutex_init(&cache->free_space_lock);
 236
 237         return cache;
 238 }
 239
 240 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
 241 {
 242         if (!cache)
 243                 return;
 244         __btrfs_remove_free_space_cache(cache->free_space_ctl);
 245         kfree(cache->free_space_ctl);
 246         kfree(cache);
 247 }
 248
 249 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 250                             struct btrfs_fs_info *fs_info)
 251 {
 252         memset(trans, 0, sizeof(*trans));
 253         trans->transid = 1;
 254         trans->type = __TRANS_DUMMY;
 255         trans->fs_info = fs_info;
 256 }
 257
 258 int btrfs_run_sanity_tests(void)
 259 {
 260         int ret, i;
 261         u32 sectorsize, nodesize;
 262         u32 test_sectorsize[] = {
 263                 PAGE_SIZE,
 264         };
 265         ret = btrfs_init_test_fs();
 266         if (ret)
 267                 return ret;
 268         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 269                 sectorsize = test_sectorsize[i];
 270                 for (nodesize = sectorsize;
 271                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 272                      nodesize <<= 1) {
 273                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 274                                 sectorsize, nodesize);
 275                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 276                         if (ret)
 277                                 goto out;
 278                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 279                                 nodesize);
 280                         if (ret)
 281                                 goto out;
 282                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 283                         if (ret)
 284                                 goto out;
 285                         ret = btrfs_test_inodes(sectorsize, nodesize);
 286                         if (ret)
 287                                 goto out;
 288                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 289                         if (ret)
 290                                 goto out;
 291                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 292                         if (ret)
 293                                 goto out;
 294                 }
 295         }
 296         ret = btrfs_test_extent_map();
 297
 298 out:
 299         btrfs_destroy_test_fs();
 300         return ret;
 301 }