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         [TEST_ALLOC_CHUNK_MAP]       = "cannot allocate chunk map",
  32         [TEST_ALLOC_IO_CONTEXT]      = "cannot allocate io context",
  33 };
  34
  35 static const struct super_operations btrfs_test_super_ops = {
  36         .alloc_inode    = btrfs_alloc_inode,
  37         .destroy_inode  = btrfs_test_destroy_inode,
  38 };
  39
  40
  41 static int btrfs_test_init_fs_context(struct fs_context *fc)
  42 {
  43         struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
  44         if (!ctx)
  45                 return -ENOMEM;
  46         ctx->ops = &btrfs_test_super_ops;
  47         return 0;
  48 }
  49
  50 static struct file_system_type test_type = {
  51         .name           = "btrfs_test_fs",
  52         .init_fs_context = btrfs_test_init_fs_context,
  53         .kill_sb        = kill_anon_super,
  54 };
  55
  56 struct inode *btrfs_new_test_inode(void)
  57 {
  58         struct inode *inode;
  59
  60         inode = new_inode(test_mnt->mnt_sb);
  61         if (!inode)
  62                 return NULL;
  63
  64         inode->i_mode = S_IFREG;
  65         btrfs_set_inode_number(BTRFS_I(inode), BTRFS_FIRST_FREE_OBJECTID);
  66         inode_init_owner(&nop_mnt_idmap, 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(fs_info, &dev->alloc_state, 0);
 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(!btrfs_is_testing(fs_info)))
 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);
 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 (IS_ERR_OR_NULL(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_global_root_delete(root);
 208         btrfs_put_root(root);
 209 }
 210
 211 struct btrfs_block_group *
 212 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 213                               unsigned long length)
 214 {
 215         struct btrfs_block_group *cache;
 216
 217         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 218         if (!cache)
 219                 return NULL;
 220         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 221                                         GFP_KERNEL);
 222         if (!cache->free_space_ctl) {
 223                 kfree(cache);
 224                 return NULL;
 225         }
 226
 227         cache->start = 0;
 228         cache->length = length;
 229         cache->full_stripe_len = fs_info->sectorsize;
 230         cache->fs_info = fs_info;
 231
 232         INIT_LIST_HEAD(&cache->list);
 233         INIT_LIST_HEAD(&cache->cluster_list);
 234         INIT_LIST_HEAD(&cache->bg_list);
 235         btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
 236         mutex_init(&cache->free_space_lock);
 237
 238         return cache;
 239 }
 240
 241 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
 242 {
 243         if (!cache)
 244                 return;
 245         btrfs_remove_free_space_cache(cache);
 246         kfree(cache->free_space_ctl);
 247         kfree(cache);
 248 }
 249
 250 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 251                             struct btrfs_fs_info *fs_info)
 252 {
 253         memset(trans, 0, sizeof(*trans));
 254         trans->transid = 1;
 255         trans->type = __TRANS_DUMMY;
 256         trans->fs_info = fs_info;
 257 }
 258
 259 int btrfs_run_sanity_tests(void)
 260 {
 261         int ret, i;
 262         u32 sectorsize, nodesize;
 263         u32 test_sectorsize[] = {
 264                 PAGE_SIZE,
 265         };
 266         ret = btrfs_init_test_fs();
 267         if (ret)
 268                 return ret;
 269         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 270                 sectorsize = test_sectorsize[i];
 271                 for (nodesize = sectorsize;
 272                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 273                      nodesize <<= 1) {
 274                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 275                                 sectorsize, nodesize);
 276                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 277                         if (ret)
 278                                 goto out;
 279                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 280                                 nodesize);
 281                         if (ret)
 282                                 goto out;
 283                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 284                         if (ret)
 285                                 goto out;
 286                         ret = btrfs_test_inodes(sectorsize, nodesize);
 287                         if (ret)
 288                                 goto out;
 289                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 290                         if (ret)
 291                                 goto out;
 292                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 293                         if (ret)
 294                                 goto out;
 295                         ret = btrfs_test_raid_stripe_tree(sectorsize, nodesize);
 296                         if (ret)
 297                                 goto out;
 298                 }
 299         }
 300         ret = btrfs_test_extent_map();
 301
 302 out:
 303         btrfs_destroy_test_fs();
 304         return ret;
 305 }