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