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         mutex_init(&fs_info->qgroup_ioctl_lock);
 125         mutex_init(&fs_info->qgroup_rescan_lock);
 126         rwlock_init(&fs_info->tree_mod_log_lock);
 127         fs_info->running_transaction = NULL;
 128         fs_info->qgroup_tree = RB_ROOT;
 129         fs_info->qgroup_ulist = NULL;
 130         atomic64_set(&fs_info->tree_mod_seq, 0);
 131         INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 132         INIT_LIST_HEAD(&fs_info->dead_roots);
 133         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
 134         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
 135         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
 136         extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
 137                             IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
 138         extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
 139                             IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 140         fs_info->pinned_extents = &fs_info->freed_extents[0];
 141         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 142
 143         test_mnt->mnt_sb->s_fs_info = fs_info;
 144
 145         return fs_info;
 146 }
 147
 148 void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
 149 {
 150         struct radix_tree_iter iter;
 151         void **slot;
 152
 153         if (!fs_info)
 154                 return;
 155
 156         if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
 157                               &fs_info->fs_state)))
 158                 return;
 159
 160         test_mnt->mnt_sb->s_fs_info = NULL;
 161
 162         spin_lock(&fs_info->buffer_lock);
 163         radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
 164                 struct extent_buffer *eb;
 165
 166                 eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
 167                 if (!eb)
 168                         continue;
 169                 /* Shouldn't happen but that kind of thinking creates CVE's */
 170                 if (radix_tree_exception(eb)) {
 171                         if (radix_tree_deref_retry(eb))
 172                                 slot = radix_tree_iter_retry(&iter);
 173                         continue;
 174                 }
 175                 slot = radix_tree_iter_resume(slot, &iter);
 176                 spin_unlock(&fs_info->buffer_lock);
 177                 free_extent_buffer_stale(eb);
 178                 spin_lock(&fs_info->buffer_lock);
 179         }
 180         spin_unlock(&fs_info->buffer_lock);
 181
 182         btrfs_free_qgroup_config(fs_info);
 183         btrfs_free_fs_roots(fs_info);
 184         cleanup_srcu_struct(&fs_info->subvol_srcu);
 185         kfree(fs_info->super_copy);
 186         kfree(fs_info->fs_devices);
 187         kfree(fs_info);
 188 }
 189
 190 void btrfs_free_dummy_root(struct btrfs_root *root)
 191 {
 192         if (IS_ERR_OR_NULL(root))
 193                 return;
 194         /* Will be freed by btrfs_free_fs_roots */
 195         if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state)))
 196                 return;
 197         if (root->node) {
 198                 /* One for allocate_extent_buffer */
 199                 free_extent_buffer(root->node);
 200         }
 201         kfree(root);
 202 }
 203
 204 struct btrfs_block_group_cache *
 205 btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info,
 206                               unsigned long length)
 207 {
 208         struct btrfs_block_group_cache *cache;
 209
 210         cache = kzalloc(sizeof(*cache), GFP_KERNEL);
 211         if (!cache)
 212                 return NULL;
 213         cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl),
 214                                         GFP_KERNEL);
 215         if (!cache->free_space_ctl) {
 216                 kfree(cache);
 217                 return NULL;
 218         }
 219
 220         cache->key.objectid = 0;
 221         cache->key.offset = length;
 222         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
 223         cache->full_stripe_len = fs_info->sectorsize;
 224         cache->fs_info = fs_info;
 225
 226         INIT_LIST_HEAD(&cache->list);
 227         INIT_LIST_HEAD(&cache->cluster_list);
 228         INIT_LIST_HEAD(&cache->bg_list);
 229         btrfs_init_free_space_ctl(cache);
 230         mutex_init(&cache->free_space_lock);
 231
 232         return cache;
 233 }
 234
 235 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache)
 236 {
 237         if (!cache)
 238                 return;
 239         __btrfs_remove_free_space_cache(cache->free_space_ctl);
 240         kfree(cache->free_space_ctl);
 241         kfree(cache);
 242 }
 243
 244 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans,
 245                             struct btrfs_fs_info *fs_info)
 246 {
 247         memset(trans, 0, sizeof(*trans));
 248         trans->transid = 1;
 249         trans->type = __TRANS_DUMMY;
 250         trans->fs_info = fs_info;
 251 }
 252
 253 int btrfs_run_sanity_tests(void)
 254 {
 255         int ret, i;
 256         u32 sectorsize, nodesize;
 257         u32 test_sectorsize[] = {
 258                 PAGE_SIZE,
 259         };
 260         ret = btrfs_init_test_fs();
 261         if (ret)
 262                 return ret;
 263         for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
 264                 sectorsize = test_sectorsize[i];
 265                 for (nodesize = sectorsize;
 266                      nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
 267                      nodesize <<= 1) {
 268                         pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
 269                                 sectorsize, nodesize);
 270                         ret = btrfs_test_free_space_cache(sectorsize, nodesize);
 271                         if (ret)
 272                                 goto out;
 273                         ret = btrfs_test_extent_buffer_operations(sectorsize,
 274                                 nodesize);
 275                         if (ret)
 276                                 goto out;
 277                         ret = btrfs_test_extent_io(sectorsize, nodesize);
 278                         if (ret)
 279                                 goto out;
 280                         ret = btrfs_test_inodes(sectorsize, nodesize);
 281                         if (ret)
 282                                 goto out;
 283                         ret = btrfs_test_qgroups(sectorsize, nodesize);
 284                         if (ret)
 285                                 goto out;
 286                         ret = btrfs_test_free_space_tree(sectorsize, nodesize);
 287                         if (ret)
 288                                 goto out;
 289                 }
 290         }
 291         ret = btrfs_test_extent_map();
 292
 293 out:
 294         btrfs_destroy_test_fs();
 295         return ret;
 296 }