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/magic.h>
   9 #include "btrfs-tests.h"
  10 #include "../ctree.h"
  11 #include "../free-space-cache.h"
  12 #include "../free-space-tree.h"
  13 #include "../transaction.h"
  14 #include "../volumes.h"
  15 #include "../disk-io.h"
  16 #include "../qgroup.h"
  17
  18 static struct vfsmount *test_mnt = NULL;
  19
  20 const char *test_error[] = {
  21         [TEST_ALLOC_FS_INFO]         = "cannot allocate fs_info",
  22         [TEST_ALLOC_ROOT]            = "cannot allocate root",
  23         [TEST_ALLOC_EXTENT_BUFFER]   = "cannot extent buffer",
  24         [TEST_ALLOC_PATH]            = "cannot allocate path",
  25         [TEST_ALLOC_INODE]           = "cannot allocate inode",
  26         [TEST_ALLOC_BLOCK_GROUP]     = "cannot allocate block group",
  27         [TEST_ALLOC_EXTENT_MAP]      = "cannot allocate extent map",
  28 };
  29
  30 static const struct super_operations btrfs_test_super_ops = {
  31         .alloc_inode    = btrfs_alloc_inode,
  32         .destroy_inode  = btrfs_test_destroy_inode,
  33 };
  34
  35 static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
  36                                        int flags, const char *dev_name,
  37                                        void *data)
  38 {
  39         return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
  40                             NULL, BTRFS_TEST_MAGIC);
  41 }
  42
  43 static struct file_system_type test_type = {
  44         .name           = "btrfs_test_fs",
  45         .mount          = btrfs_test_mount,
  46         .kill_sb        = kill_anon_super,
  47 };
  48
  49 struct inode *btrfs_new_test_inode(void)
  50 {
  51         return new_inode(test_mnt->mnt_sb);
  52 }
  53
  54 static int btrfs_init_test_fs(void)
  55 {
  56         int ret;
  57
  58         ret = register_filesystem(&test_type);
  59         if (ret) {
  60                 printk(KERN_ERR "btrfs: cannot register test file system\n");
  61                 return ret;
  62         }
  63
  64         test_mnt = kern_mount(&test_type);
  65         if (IS_ERR(test_mnt)) {
  66                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
  67                 unregister_filesystem(&test_type);
  68                 return PTR_ERR(test_mnt);
  69         }
  70         return 0;
  71 }
  72
  73 static void btrfs_destroy_test_fs(void)
  74 {
  75         kern_unmount(test_mnt);
  76         unregister_filesystem(&test_type);
  77 }
  78
  79 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
  80 {
  81         struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
  82                                                 GFP_KERNEL);
  83
  84         if (!fs_info)
  85                 return fs_info;
  86         fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
  87                                       GFP_KERNEL);
  88         if (!fs_info->fs_devices) {
  89                 kfree(fs_info);
  90                 return NULL;
  91         }
  92         fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
  93                                       GFP_KERNEL);
  94         if (!fs_info->super_copy) {
  95                 kfree(fs_info->fs_devices);
  96                 kfree(fs_info);
  97                 return NULL;
  98         }
  99
 100         fs_info->nodesize = nodesize;
 101         fs_info->sectorsize = sectorsize;
 102
 103         if (init_srcu_struct(&fs_info->subvol_srcu)) {
 104                 kfree(fs_info->fs_devices);
 105                 kfree(fs_info->super_copy);
 106                 kfree(fs_info);
 107                 return NULL;
 108         }
 109
 110         spin_lock_init(&fs_info->buffer_lock);
 111         spin_lock_init(&fs_info->qgroup_lock);
 112         spin_lock_init(&fs_info->super_lock);
 113         spin_lock_init(&fs_info->fs_roots_radix_lock);
 114         spin_lock_init(&fs_info->tree_mod_seq_lock);
 115         mutex_init(&fs_info->qgroup_ioctl_lock);
 116         mutex_init(&fs_info->qgroup_rescan_lock);
 117         rwlock_init(&fs_info->tree_mod_log_lock);
 118         fs_info->running_transaction = NULL;
 119         fs_info->qgroup_tree = RB_ROOT;
 120         fs_info->qgroup_ulist = NULL;
 121         atomic64_set(&fs_info->tree_mod_seq, 0);
 122         INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 123         INIT_LIST_HEAD(&fs_info->dead_roots);
 124         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
 125         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
 126         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
 127         extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
 128                             IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
 129         extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
 130                             IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 131         fs_info->pinned_extents = &fs_info->freed_extents[0];
 132         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 133
 134         test_mnt->mnt_sb->s_fs_info = fs_info;
 135
 136         return fs_info;
 137 }
 138
 139 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
 140 {
 141         struct radix_tree_iter iter;
 142         void **slot;
 143
 144         if (!fs_info)
 145                 return;
 146
 147         if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
 148                               &fs_info->fs_state)))
 149                 return;
 150
 151         test_mnt->mnt_sb->s_fs_info = NULL;
 152
 153         spin_lock(&fs_info->buffer_lock);
 154         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
 155                 struct extent_buffer *eb;
 156
 157                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
 158                 if (!eb)
 159                         continue;
 160                 /* Shouldn't happen but that kind of thinking creates CVE's */
 161                 if (radix_tree_exception(eb)) {
 162                         if (radix_tree_deref_retry(eb))
 163                                 slot = radix_tree_iter_retry(&iter);
 164                         continue;
 165                 }
 166                 slot = radix_tree_iter_resume(slot, &iter);
 167                 spin_unlock(&fs_info->buffer_lock);
 168                 free_extent_buffer_stale(eb);
 169                 spin_lock(&fs_info->buffer_lock);
 170         }
 171         spin_unlock(&fs_info->buffer_lock);
 172
 173         btrfs_free_qgroup_config(fs_info);
 174         btrfs_free_fs_roots(fs_info);
 175         cleanup_srcu_struct(&fs_info->subvol_srcu);
 176         kfree(fs_info->super_copy);
 177         kfree(fs_info->fs_devices);
 178         kfree(fs_info);
 179 }
 180
 181 void btrfs_free_dummy_root(struct btrfs_root *root)
 182 {
 183         if (!root)
 184                 return;
 185         /* Will be freed by btrfs_free_fs_roots */
 186         if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
 187                 return;
 188         if (root->node) {
 189                 /* One for allocate_extent_buffer */
 190                 free_extent_buffer(root->node);
 191         }
 192         kfree(root);
 193 }
 194
 195 struct btrfs_block_group_cache *
 196 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 197                               unsigned long length)
 198 {
 199         struct btrfs_block_group_cache *cache;
 200
 201         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 202         if (!cache)
 203                 return NULL;
 204         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 205                                         GFP_KERNEL);
 206         if (!cache->free_space_ctl) {
 207                 kfree(cache);
 208                 return NULL;
 209         }
 210
 211         cache->key.objectid = 0;
 212         cache->key.offset = length;
 213         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 214         cache->full_stripe_len = fs_info->sectorsize;
 215         cache->fs_info = fs_info;
 216
 217         INIT_LIST_HEAD(&cache->list);
 218         INIT_LIST_HEAD(&cache->cluster_list);
 219         INIT_LIST_HEAD(&cache->bg_list);
 220         btrfs_init_free_space_ctl(cache);
 221         mutex_init(&cache->free_space_lock);
 222
 223         return cache;
 224 }
 225
 226 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
 227 {
 228         if (!cache)
 229                 return;
 230         __btrfs_remove_free_space_cache(cache->free_space_ctl);
 231         kfree(cache->free_space_ctl);
 232         kfree(cache);
 233 }
 234
 235 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 236                             struct btrfs_fs_info *fs_info)
 237 {
 238         memset(trans, 0, sizeof(*trans));
 239         trans->transid = 1;
 240         trans->type = __TRANS_DUMMY;
 241         trans->fs_info = fs_info;
 242 }
 243
 244 int btrfs_run_sanity_tests(void)
 245 {
 246         int ret, i;
 247         u32 sectorsize, nodesize;
 248         u32 test_sectorsize[] = {
 249                 PAGE_SIZE,
 250         };
 251         ret = btrfs_init_test_fs();
 252         if (ret)
 253                 return ret;
 254         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 255                 sectorsize = test_sectorsize[i];
 256                 for (nodesize = sectorsize;
 257                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 258                      nodesize <<= 1) {
 259                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 260                                 sectorsize, nodesize);
 261                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 262                         if (ret)
 263                                 goto out;
 264                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 265                                 nodesize);
 266                         if (ret)
 267                                 goto out;
 268                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 269                         if (ret)
 270                                 goto out;
 271                         ret = btrfs_test_inodes(sectorsize, nodesize);
 272                         if (ret)
 273                                 goto out;
 274                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 275                         if (ret)
 276                                 goto out;
 277                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 278                         if (ret)
 279                                 goto out;
 280                 }
 281         }
 282         ret = btrfs_test_extent_map();
 283
 284 out:
 285         btrfs_destroy_test_fs();
 286         return ret;
 287 }