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         return new_inode(test_mnt->mnt_sb);
  56 }
  57
  58 static int btrfs_init_test_fs(void)
  59 {
  60         int ret;
  61
  62         ret = register_filesystem(&test_type);
  63         if (ret) {
  64                 printk(KERN_ERR "btrfs: cannot register test file system\n");
  65                 return ret;
  66         }
  67
  68         test_mnt = kern_mount(&test_type);
  69         if (IS_ERR(test_mnt)) {
  70                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
  71                 unregister_filesystem(&test_type);
  72                 return PTR_ERR(test_mnt);
  73         }
  74         return 0;
  75 }
  76
  77 static void btrfs_destroy_test_fs(void)
  78 {
  79         kern_unmount(test_mnt);
  80         unregister_filesystem(&test_type);
  81 }
  82
  83 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
  84 {
  85         struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
  86                                                 GFP_KERNEL);
  87
  88         if (!fs_info)
  89                 return fs_info;
  90         fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
  91                                       GFP_KERNEL);
  92         if (!fs_info->fs_devices) {
  93                 kfree(fs_info);
  94                 return NULL;
  95         }
  96         fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
  97                                       GFP_KERNEL);
  98         if (!fs_info->super_copy) {
  99                 kfree(fs_info->fs_devices);
 100                 kfree(fs_info);
 101                 return NULL;
 102         }
 103
 104         fs_info->nodesize = nodesize;
 105         fs_info->sectorsize = sectorsize;
 106
 107         if (init_srcu_struct(&fs_info->subvol_srcu)) {
 108                 kfree(fs_info->fs_devices);
 109                 kfree(fs_info->super_copy);
 110                 kfree(fs_info);
 111                 return NULL;
 112         }
 113
 114         spin_lock_init(&fs_info->buffer_lock);
 115         spin_lock_init(&fs_info->qgroup_lock);
 116         spin_lock_init(&fs_info->super_lock);
 117         spin_lock_init(&fs_info->fs_roots_radix_lock);
 118         spin_lock_init(&fs_info->tree_mod_seq_lock);
 119         mutex_init(&fs_info->qgroup_ioctl_lock);
 120         mutex_init(&fs_info->qgroup_rescan_lock);
 121         rwlock_init(&fs_info->tree_mod_log_lock);
 122         fs_info->running_transaction = NULL;
 123         fs_info->qgroup_tree = RB_ROOT;
 124         fs_info->qgroup_ulist = NULL;
 125         atomic64_set(&fs_info->tree_mod_seq, 0);
 126         INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 127         INIT_LIST_HEAD(&fs_info->dead_roots);
 128         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
 129         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
 130         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
 131         extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
 132                             IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
 133         extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
 134                             IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 135         fs_info->pinned_extents = &fs_info->freed_extents[0];
 136         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 137
 138         test_mnt->mnt_sb->s_fs_info = fs_info;
 139
 140         return fs_info;
 141 }
 142
 143 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
 144 {
 145         struct radix_tree_iter iter;
 146         void **slot;
 147
 148         if (!fs_info)
 149                 return;
 150
 151         if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
 152                               &fs_info->fs_state)))
 153                 return;
 154
 155         test_mnt->mnt_sb->s_fs_info = NULL;
 156
 157         spin_lock(&fs_info->buffer_lock);
 158         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
 159                 struct extent_buffer *eb;
 160
 161                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
 162                 if (!eb)
 163                         continue;
 164                 /* Shouldn't happen but that kind of thinking creates CVE's */
 165                 if (radix_tree_exception(eb)) {
 166                         if (radix_tree_deref_retry(eb))
 167                                 slot = radix_tree_iter_retry(&iter);
 168                         continue;
 169                 }
 170                 slot = radix_tree_iter_resume(slot, &iter);
 171                 spin_unlock(&fs_info->buffer_lock);
 172                 free_extent_buffer_stale(eb);
 173                 spin_lock(&fs_info->buffer_lock);
 174         }
 175         spin_unlock(&fs_info->buffer_lock);
 176
 177         btrfs_free_qgroup_config(fs_info);
 178         btrfs_free_fs_roots(fs_info);
 179         cleanup_srcu_struct(&fs_info->subvol_srcu);
 180         kfree(fs_info->super_copy);
 181         kfree(fs_info->fs_devices);
 182         kfree(fs_info);
 183 }
 184
 185 void btrfs_free_dummy_root(struct btrfs_root *root)
 186 {
 187         if (!root)
 188                 return;
 189         /* Will be freed by btrfs_free_fs_roots */
 190         if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
 191                 return;
 192         if (root->node) {
 193                 /* One for allocate_extent_buffer */
 194                 free_extent_buffer(root->node);
 195         }
 196         kfree(root);
 197 }
 198
 199 struct btrfs_block_group_cache *
 200 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 201                               unsigned long length)
 202 {
 203         struct btrfs_block_group_cache *cache;
 204
 205         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 206         if (!cache)
 207                 return NULL;
 208         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 209                                         GFP_KERNEL);
 210         if (!cache->free_space_ctl) {
 211                 kfree(cache);
 212                 return NULL;
 213         }
 214
 215         cache->key.objectid = 0;
 216         cache->key.offset = length;
 217         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 218         cache->full_stripe_len = fs_info->sectorsize;
 219         cache->fs_info = fs_info;
 220
 221         INIT_LIST_HEAD(&cache->list);
 222         INIT_LIST_HEAD(&cache->cluster_list);
 223         INIT_LIST_HEAD(&cache->bg_list);
 224         btrfs_init_free_space_ctl(cache);
 225         mutex_init(&cache->free_space_lock);
 226
 227         return cache;
 228 }
 229
 230 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
 231 {
 232         if (!cache)
 233                 return;
 234         __btrfs_remove_free_space_cache(cache->free_space_ctl);
 235         kfree(cache->free_space_ctl);
 236         kfree(cache);
 237 }
 238
 239 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 240                             struct btrfs_fs_info *fs_info)
 241 {
 242         memset(trans, 0, sizeof(*trans));
 243         trans->transid = 1;
 244         trans->type = __TRANS_DUMMY;
 245         trans->fs_info = fs_info;
 246 }
 247
 248 int btrfs_run_sanity_tests(void)
 249 {
 250         int ret, i;
 251         u32 sectorsize, nodesize;
 252         u32 test_sectorsize[] = {
 253                 PAGE_SIZE,
 254         };
 255         ret = btrfs_init_test_fs();
 256         if (ret)
 257                 return ret;
 258         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 259                 sectorsize = test_sectorsize[i];
 260                 for (nodesize = sectorsize;
 261                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 262                      nodesize <<= 1) {
 263                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 264                                 sectorsize, nodesize);
 265                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 266                         if (ret)
 267                                 goto out;
 268                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 269                                 nodesize);
 270                         if (ret)
 271                                 goto out;
 272                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 273                         if (ret)
 274                                 goto out;
 275                         ret = btrfs_test_inodes(sectorsize, nodesize);
 276                         if (ret)
 277                                 goto out;
 278                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 279                         if (ret)
 280                                 goto out;
 281                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 282                         if (ret)
 283                                 goto out;
 284                 }
 285         }
 286         ret = btrfs_test_extent_map();
 287
 288 out:
 289         btrfs_destroy_test_fs();
 290         return ret;
 291 }