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                 inode_init_owner(inode, NULL, S_IFREG);
  60
  61         return inode;
  62 }
  63
  64 static int btrfs_init_test_fs(void)
  65 {
  66         int ret;
  67
  68         ret = register_filesystem(&test_type);
  69         if (ret) {
  70                 printk(KERN_ERR "btrfs: cannot register test file system\n");
  71                 return ret;
  72         }
  73
  74         test_mnt = kern_mount(&test_type);
  75         if (IS_ERR(test_mnt)) {
  76                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
  77                 unregister_filesystem(&test_type);
  78                 return PTR_ERR(test_mnt);
  79         }
  80         return 0;
  81 }
  82
  83 static void btrfs_destroy_test_fs(void)
  84 {
  85         kern_unmount(test_mnt);
  86         unregister_filesystem(&test_type);
  87 }
  88
  89 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
  90 {
  91         struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
  92                                                 GFP_KERNEL);
  93
  94         if (!fs_info)
  95                 return fs_info;
  96         fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
  97                                       GFP_KERNEL);
  98         if (!fs_info->fs_devices) {
  99                 kfree(fs_info);
 100                 return NULL;
 101         }
 102         fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
 103                                       GFP_KERNEL);
 104         if (!fs_info->super_copy) {
 105                 kfree(fs_info->fs_devices);
 106                 kfree(fs_info);
 107                 return NULL;
 108         }
 109
 110         fs_info->nodesize = nodesize;
 111         fs_info->sectorsize = sectorsize;
 112
 113         if (init_srcu_struct(&fs_info->subvol_srcu)) {
 114                 kfree(fs_info->fs_devices);
 115                 kfree(fs_info->super_copy);
 116                 kfree(fs_info);
 117                 return NULL;
 118         }
 119
 120         spin_lock_init(&fs_info->buffer_lock);
 121         spin_lock_init(&fs_info->qgroup_lock);
 122         spin_lock_init(&fs_info->super_lock);
 123         spin_lock_init(&fs_info->fs_roots_radix_lock);
 124         spin_lock_init(&fs_info->tree_mod_seq_lock);
 125         mutex_init(&fs_info->qgroup_ioctl_lock);
 126         mutex_init(&fs_info->qgroup_rescan_lock);
 127         rwlock_init(&fs_info->tree_mod_log_lock);
 128         fs_info->running_transaction = NULL;
 129         fs_info->qgroup_tree = RB_ROOT;
 130         fs_info->qgroup_ulist = NULL;
 131         atomic64_set(&fs_info->tree_mod_seq, 0);
 132         INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 133         INIT_LIST_HEAD(&fs_info->dead_roots);
 134         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
 135         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
 136         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
 137         extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
 138                             IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
 139         extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
 140                             IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 141         fs_info->pinned_extents = &fs_info->freed_extents[0];
 142         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 143
 144         test_mnt->mnt_sb->s_fs_info = fs_info;
 145
 146         return fs_info;
 147 }
 148
 149 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
 150 {
 151         struct radix_tree_iter iter;
 152         void **slot;
 153
 154         if (!fs_info)
 155                 return;
 156
 157         if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
 158                               &fs_info->fs_state)))
 159                 return;
 160
 161         test_mnt->mnt_sb->s_fs_info = NULL;
 162
 163         spin_lock(&fs_info->buffer_lock);
 164         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
 165                 struct extent_buffer *eb;
 166
 167                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
 168                 if (!eb)
 169                         continue;
 170                 /* Shouldn't happen but that kind of thinking creates CVE's */
 171                 if (radix_tree_exception(eb)) {
 172                         if (radix_tree_deref_retry(eb))
 173                                 slot = radix_tree_iter_retry(&iter);
 174                         continue;
 175                 }
 176                 slot = radix_tree_iter_resume(slot, &iter);
 177                 spin_unlock(&fs_info->buffer_lock);
 178                 free_extent_buffer_stale(eb);
 179                 spin_lock(&fs_info->buffer_lock);
 180         }
 181         spin_unlock(&fs_info->buffer_lock);
 182
 183         btrfs_free_qgroup_config(fs_info);
 184         btrfs_free_fs_roots(fs_info);
 185         cleanup_srcu_struct(&fs_info->subvol_srcu);
 186         kfree(fs_info->super_copy);
 187         kfree(fs_info->fs_devices);
 188         kfree(fs_info);
 189 }
 190
 191 void btrfs_free_dummy_root(struct btrfs_root *root)
 192 {
 193         if (!root)
 194                 return;
 195         /* Will be freed by btrfs_free_fs_roots */
 196         if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
 197                 return;
 198         if (root->node) {
 199                 /* One for allocate_extent_buffer */
 200                 free_extent_buffer(root->node);
 201         }
 202         kfree(root);
 203 }
 204
 205 struct btrfs_block_group_cache *
 206 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 207                               unsigned long length)
 208 {
 209         struct btrfs_block_group_cache *cache;
 210
 211         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 212         if (!cache)
 213                 return NULL;
 214         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 215                                         GFP_KERNEL);
 216         if (!cache->free_space_ctl) {
 217                 kfree(cache);
 218                 return NULL;
 219         }
 220
 221         cache->key.objectid = 0;
 222         cache->key.offset = length;
 223         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 224         cache->full_stripe_len = fs_info->sectorsize;
 225         cache->fs_info = fs_info;
 226
 227         INIT_LIST_HEAD(&cache->list);
 228         INIT_LIST_HEAD(&cache->cluster_list);
 229         INIT_LIST_HEAD(&cache->bg_list);
 230         btrfs_init_free_space_ctl(cache);
 231         mutex_init(&cache->free_space_lock);
 232
 233         return cache;
 234 }
 235
 236 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
 237 {
 238         if (!cache)
 239                 return;
 240         __btrfs_remove_free_space_cache(cache->free_space_ctl);
 241         kfree(cache->free_space_ctl);
 242         kfree(cache);
 243 }
 244
 245 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 246                             struct btrfs_fs_info *fs_info)
 247 {
 248         memset(trans, 0, sizeof(*trans));
 249         trans->transid = 1;
 250         trans->type = __TRANS_DUMMY;
 251         trans->fs_info = fs_info;
 252 }
 253
 254 int btrfs_run_sanity_tests(void)
 255 {
 256         int ret, i;
 257         u32 sectorsize, nodesize;
 258         u32 test_sectorsize[] = {
 259                 PAGE_SIZE,
 260         };
 261         ret = btrfs_init_test_fs();
 262         if (ret)
 263                 return ret;
 264         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 265                 sectorsize = test_sectorsize[i];
 266                 for (nodesize = sectorsize;
 267                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 268                      nodesize <<= 1) {
 269                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 270                                 sectorsize, nodesize);
 271                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 272                         if (ret)
 273                                 goto out;
 274                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 275                                 nodesize);
 276                         if (ret)
 277                                 goto out;
 278                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 279                         if (ret)
 280                                 goto out;
 281                         ret = btrfs_test_inodes(sectorsize, nodesize);
 282                         if (ret)
 283                                 goto out;
 284                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 285                         if (ret)
 286                                 goto out;
 287                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 288                         if (ret)
 289                                 goto out;
 290                 }
 291         }
 292         ret = btrfs_test_extent_map();
 293
 294 out:
 295         btrfs_destroy_test_fs();
 296         return ret;
 297 }