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 };
  33
  34 static const struct super_operations btrfs_test_super_ops = {
  35         .alloc_inode    = btrfs_alloc_inode,
  36         .destroy_inode  = btrfs_test_destroy_inode,
  37 };
  38
  39
  40 static int btrfs_test_init_fs_context(struct fs_context *fc)
  41 {
  42         struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
  43         if (!ctx)
  44                 return -ENOMEM;
  45         ctx->ops = &btrfs_test_super_ops;
  46         return 0;
  47 }
  48
  49 static struct file_system_type test_type = {
  50         .name           = "btrfs_test_fs",
  51         .init_fs_context = btrfs_test_init_fs_context,
  52         .kill_sb        = kill_anon_super,
  53 };
  54
  55 struct inode *btrfs_new_test_inode(void)
  56 {
  57         struct inode *inode;
  58
  59         inode = new_inode(test_mnt->mnt_sb);
  60         if (!inode)
  61                 return NULL;
  62
  63         inode->i_mode = S_IFREG;
  64         inode->i_ino = BTRFS_FIRST_FREE_OBJECTID;
  65         BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
  66         BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
  67         BTRFS_I(inode)->location.offset = 0;
  68         inode_init_owner(&nop_mnt_idmap, inode, NULL, S_IFREG);
  69
  70         return inode;
  71 }
  72
  73 static int btrfs_init_test_fs(void)
  74 {
  75         int ret;
  76
  77         ret = register_filesystem(&test_type);
  78         if (ret) {
  79                 printk(KERN_ERR "btrfs: cannot register test file system\n");
  80                 return ret;
  81         }
  82
  83         test_mnt = kern_mount(&test_type);
  84         if (IS_ERR(test_mnt)) {
  85                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
  86                 unregister_filesystem(&test_type);
  87                 return PTR_ERR(test_mnt);
  88         }
  89         return 0;
  90 }
  91
  92 static void btrfs_destroy_test_fs(void)
  93 {
  94         kern_unmount(test_mnt);
  95         unregister_filesystem(&test_type);
  96 }
  97
  98 struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
  99 {
 100         struct btrfs_device *dev;
 101
 102         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 103         if (!dev)
 104                 return ERR_PTR(-ENOMEM);
 105
 106         extent_io_tree_init(fs_info, &dev->alloc_state, 0);
 107         INIT_LIST_HEAD(&dev->dev_list);
 108         list_add(&dev->dev_list, &fs_info->fs_devices->devices);
 109
 110         return dev;
 111 }
 112
 113 static void btrfs_free_dummy_device(struct btrfs_device *dev)
 114 {
 115         extent_io_tree_release(&dev->alloc_state);
 116         kfree(dev);
 117 }
 118
 119 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
 120 {
 121         struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
 122                                                 GFP_KERNEL);
 123
 124         if (!fs_info)
 125                 return fs_info;
 126         fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
 127                                       GFP_KERNEL);
 128         if (!fs_info->fs_devices) {
 129                 kfree(fs_info);
 130                 return NULL;
 131         }
 132         INIT_LIST_HEAD(&fs_info->fs_devices->devices);
 133
 134         fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
 135                                       GFP_KERNEL);
 136         if (!fs_info->super_copy) {
 137                 kfree(fs_info->fs_devices);
 138                 kfree(fs_info);
 139                 return NULL;
 140         }
 141
 142         btrfs_init_fs_info(fs_info);
 143
 144         fs_info->nodesize = nodesize;
 145         fs_info->sectorsize = sectorsize;
 146         fs_info->sectorsize_bits = ilog2(sectorsize);
 147         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 148
 149         test_mnt->mnt_sb->s_fs_info = fs_info;
 150
 151         return fs_info;
 152 }
 153
 154 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
 155 {
 156         struct radix_tree_iter iter;
 157         void **slot;
 158         struct btrfs_device *dev, *tmp;
 159
 160         if (!fs_info)
 161                 return;
 162
 163         if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
 164                               &fs_info->fs_state)))
 165                 return;
 166
 167         test_mnt->mnt_sb->s_fs_info = NULL;
 168
 169         spin_lock(&fs_info->buffer_lock);
 170         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
 171                 struct extent_buffer *eb;
 172
 173                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
 174                 if (!eb)
 175                         continue;
 176                 /* Shouldn't happen but that kind of thinking creates CVE's */
 177                 if (radix_tree_exception(eb)) {
 178                         if (radix_tree_deref_retry(eb))
 179                                 slot = radix_tree_iter_retry(&iter);
 180                         continue;
 181                 }
 182                 slot = radix_tree_iter_resume(slot, &iter);
 183                 spin_unlock(&fs_info->buffer_lock);
 184                 free_extent_buffer_stale(eb);
 185                 spin_lock(&fs_info->buffer_lock);
 186         }
 187         spin_unlock(&fs_info->buffer_lock);
 188
 189         btrfs_mapping_tree_free(fs_info);
 190         list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices,
 191                                  dev_list) {
 192                 btrfs_free_dummy_device(dev);
 193         }
 194         btrfs_free_qgroup_config(fs_info);
 195         btrfs_free_fs_roots(fs_info);
 196         kfree(fs_info->super_copy);
 197         btrfs_check_leaked_roots(fs_info);
 198         btrfs_extent_buffer_leak_debug_check(fs_info);
 199         kfree(fs_info->fs_devices);
 200         kfree(fs_info);
 201 }
 202
 203 void btrfs_free_dummy_root(struct btrfs_root *root)
 204 {
 205         if (IS_ERR_OR_NULL(root))
 206                 return;
 207         /* Will be freed by btrfs_free_fs_roots */
 208         if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
 209                 return;
 210         btrfs_global_root_delete(root);
 211         btrfs_put_root(root);
 212 }
 213
 214 struct btrfs_block_group *
 215 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 216                               unsigned long length)
 217 {
 218         struct btrfs_block_group *cache;
 219
 220         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 221         if (!cache)
 222                 return NULL;
 223         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 224                                         GFP_KERNEL);
 225         if (!cache->free_space_ctl) {
 226                 kfree(cache);
 227                 return NULL;
 228         }
 229
 230         cache->start = 0;
 231         cache->length = length;
 232         cache->full_stripe_len = fs_info->sectorsize;
 233         cache->fs_info = fs_info;
 234
 235         INIT_LIST_HEAD(&cache->list);
 236         INIT_LIST_HEAD(&cache->cluster_list);
 237         INIT_LIST_HEAD(&cache->bg_list);
 238         btrfs_init_free_space_ctl(cache, cache->free_space_ctl);
 239         mutex_init(&cache->free_space_lock);
 240
 241         return cache;
 242 }
 243
 244 void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
 245 {
 246         if (!cache)
 247                 return;
 248         btrfs_remove_free_space_cache(cache);
 249         kfree(cache->free_space_ctl);
 250         kfree(cache);
 251 }
 252
 253 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 254                             struct btrfs_fs_info *fs_info)
 255 {
 256         memset(trans, 0, sizeof(*trans));
 257         trans->transid = 1;
 258         trans->type = __TRANS_DUMMY;
 259         trans->fs_info = fs_info;
 260 }
 261
 262 int btrfs_run_sanity_tests(void)
 263 {
 264         int ret, i;
 265         u32 sectorsize, nodesize;
 266         u32 test_sectorsize[] = {
 267                 PAGE_SIZE,
 268         };
 269         ret = btrfs_init_test_fs();
 270         if (ret)
 271                 return ret;
 272         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 273                 sectorsize = test_sectorsize[i];
 274                 for (nodesize = sectorsize;
 275                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 276                      nodesize <<= 1) {
 277                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 278                                 sectorsize, nodesize);
 279                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 280                         if (ret)
 281                                 goto out;
 282                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 283                                 nodesize);
 284                         if (ret)
 285                                 goto out;
 286                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 287                         if (ret)
 288                                 goto out;
 289                         ret = btrfs_test_inodes(sectorsize, nodesize);
 290                         if (ret)
 291                                 goto out;
 292                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 293                         if (ret)
 294                                 goto out;
 295                         ret = btrfs_test_free_space_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 }