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
  19 static struct vfsmount *test_mnt = NULL;
  20
  21 const char *test_error[] = {
  22         [TEST_ALLOC_FS_INFO]         = "cannot allocate fs_info",
  23         [TEST_ALLOC_ROOT]            = "cannot allocate root",
  24         [TEST_ALLOC_EXTENT_BUFFER]   = "cannot extent buffer",
  25         [TEST_ALLOC_PATH]            = "cannot allocate path",
  26         [TEST_ALLOC_INODE]           = "cannot allocate inode",
  27         [TEST_ALLOC_BLOCK_GROUP]     = "cannot allocate block group",
  28         [TEST_ALLOC_EXTENT_MAP]      = "cannot allocate extent map",
  29 };
  30
  31 static const struct super_operations btrfs_test_super_ops = {
  32         .alloc_inode    = btrfs_alloc_inode,
  33         .destroy_inode  = btrfs_test_destroy_inode,
  34 };
  35
  36
  37 static int btrfs_test_init_fs_context(struct fs_context *fc)
  38 {
  39         struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC);
  40         if (!ctx)
  41                 return -ENOMEM;
  42         ctx->ops = &btrfs_test_super_ops;
  43         return 0;
  44 }
  45
  46 static struct file_system_type test_type = {
  47         .name           = "btrfs_test_fs",
  48         .init_fs_context = btrfs_test_init_fs_context,
  49         .kill_sb        = kill_anon_super,
  50 };
  51
  52 struct inode *btrfs_new_test_inode(void)
  53 {
  54         return new_inode(test_mnt->mnt_sb);
  55 }
  56
  57 static int btrfs_init_test_fs(void)
  58 {
  59         int ret;
  60
  61         ret = register_filesystem(&test_type);
  62         if (ret) {
  63                 printk(KERN_ERR "btrfs: cannot register test file system\n");
  64                 return ret;
  65         }
  66
  67         test_mnt = kern_mount(&test_type);
  68         if (IS_ERR(test_mnt)) {
  69                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
  70                 unregister_filesystem(&test_type);
  71                 return PTR_ERR(test_mnt);
  72         }
  73         return 0;
  74 }
  75
  76 static void btrfs_destroy_test_fs(void)
  77 {
  78         kern_unmount(test_mnt);
  79         unregister_filesystem(&test_type);
  80 }
  81
  82 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
  83 {
  84         struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
  85                                                 GFP_KERNEL);
  86
  87         if (!fs_info)
  88                 return fs_info;
  89         fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
  90                                       GFP_KERNEL);
  91         if (!fs_info->fs_devices) {
  92                 kfree(fs_info);
  93                 return NULL;
  94         }
  95         fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
  96                                       GFP_KERNEL);
  97         if (!fs_info->super_copy) {
  98                 kfree(fs_info->fs_devices);
  99                 kfree(fs_info);
 100                 return NULL;
 101         }
 102
 103         fs_info->nodesize = nodesize;
 104         fs_info->sectorsize = sectorsize;
 105
 106         if (init_srcu_struct(&fs_info->subvol_srcu)) {
 107                 kfree(fs_info->fs_devices);
 108                 kfree(fs_info->super_copy);
 109                 kfree(fs_info);
 110                 return NULL;
 111         }
 112
 113         spin_lock_init(&fs_info->buffer_lock);
 114         spin_lock_init(&fs_info->qgroup_lock);
 115         spin_lock_init(&fs_info->super_lock);
 116         spin_lock_init(&fs_info->fs_roots_radix_lock);
 117         spin_lock_init(&fs_info->tree_mod_seq_lock);
 118         mutex_init(&fs_info->qgroup_ioctl_lock);
 119         mutex_init(&fs_info->qgroup_rescan_lock);
 120         rwlock_init(&fs_info->tree_mod_log_lock);
 121         fs_info->running_transaction = NULL;
 122         fs_info->qgroup_tree = RB_ROOT;
 123         fs_info->qgroup_ulist = NULL;
 124         atomic64_set(&fs_info->tree_mod_seq, 0);
 125         INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 126         INIT_LIST_HEAD(&fs_info->dead_roots);
 127         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
 128         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
 129         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
 130         extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
 131                             IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
 132         extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
 133                             IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 134         fs_info->pinned_extents = &fs_info->freed_extents[0];
 135         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 136
 137         test_mnt->mnt_sb->s_fs_info = fs_info;
 138
 139         return fs_info;
 140 }
 141
 142 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
 143 {
 144         struct radix_tree_iter iter;
 145         void **slot;
 146
 147         if (!fs_info)
 148                 return;
 149
 150         if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
 151                               &fs_info->fs_state)))
 152                 return;
 153
 154         test_mnt->mnt_sb->s_fs_info = NULL;
 155
 156         spin_lock(&fs_info->buffer_lock);
 157         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
 158                 struct extent_buffer *eb;
 159
 160                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
 161                 if (!eb)
 162                         continue;
 163                 /* Shouldn't happen but that kind of thinking creates CVE's */
 164                 if (radix_tree_exception(eb)) {
 165                         if (radix_tree_deref_retry(eb))
 166                                 slot = radix_tree_iter_retry(&iter);
 167                         continue;
 168                 }
 169                 slot = radix_tree_iter_resume(slot, &iter);
 170                 spin_unlock(&fs_info->buffer_lock);
 171                 free_extent_buffer_stale(eb);
 172                 spin_lock(&fs_info->buffer_lock);
 173         }
 174         spin_unlock(&fs_info->buffer_lock);
 175
 176         btrfs_free_qgroup_config(fs_info);
 177         btrfs_free_fs_roots(fs_info);
 178         cleanup_srcu_struct(&fs_info->subvol_srcu);
 179         kfree(fs_info->super_copy);
 180         kfree(fs_info->fs_devices);
 181         kfree(fs_info);
 182 }
 183
 184 void btrfs_free_dummy_root(struct btrfs_root *root)
 185 {
 186         if (!root)
 187                 return;
 188         /* Will be freed by btrfs_free_fs_roots */
 189         if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
 190                 return;
 191         if (root->node) {
 192                 /* One for allocate_extent_buffer */
 193                 free_extent_buffer(root->node);
 194         }
 195         kfree(root);
 196 }
 197
 198 struct btrfs_block_group_cache *
 199 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 200                               unsigned long length)
 201 {
 202         struct btrfs_block_group_cache *cache;
 203
 204         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 205         if (!cache)
 206                 return NULL;
 207         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 208                                         GFP_KERNEL);
 209         if (!cache->free_space_ctl) {
 210                 kfree(cache);
 211                 return NULL;
 212         }
 213
 214         cache->key.objectid = 0;
 215         cache->key.offset = length;
 216         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 217         cache->full_stripe_len = fs_info->sectorsize;
 218         cache->fs_info = fs_info;
 219
 220         INIT_LIST_HEAD(&cache->list);
 221         INIT_LIST_HEAD(&cache->cluster_list);
 222         INIT_LIST_HEAD(&cache->bg_list);
 223         btrfs_init_free_space_ctl(cache);
 224         mutex_init(&cache->free_space_lock);
 225
 226         return cache;
 227 }
 228
 229 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
 230 {
 231         if (!cache)
 232                 return;
 233         __btrfs_remove_free_space_cache(cache->free_space_ctl);
 234         kfree(cache->free_space_ctl);
 235         kfree(cache);
 236 }
 237
 238 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 239                             struct btrfs_fs_info *fs_info)
 240 {
 241         memset(trans, 0, sizeof(*trans));
 242         trans->transid = 1;
 243         trans->type = __TRANS_DUMMY;
 244         trans->fs_info = fs_info;
 245 }
 246
 247 int btrfs_run_sanity_tests(void)
 248 {
 249         int ret, i;
 250         u32 sectorsize, nodesize;
 251         u32 test_sectorsize[] = {
 252                 PAGE_SIZE,
 253         };
 254         ret = btrfs_init_test_fs();
 255         if (ret)
 256                 return ret;
 257         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 258                 sectorsize = test_sectorsize[i];
 259                 for (nodesize = sectorsize;
 260                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 261                      nodesize <<= 1) {
 262                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 263                                 sectorsize, nodesize);
 264                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 265                         if (ret)
 266                                 goto out;
 267                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 268                                 nodesize);
 269                         if (ret)
 270                                 goto out;
 271                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 272                         if (ret)
 273                                 goto out;
 274                         ret = btrfs_test_inodes(sectorsize, nodesize);
 275                         if (ret)
 276                                 goto out;
 277                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 278                         if (ret)
 279                                 goto out;
 280                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 281                         if (ret)
 282                                 goto out;
 283                 }
 284         }
 285         ret = btrfs_test_extent_map();
 286
 287 out:
 288         btrfs_destroy_test_fs();
 289         return ret;
 290 }