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