| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2013 Fusion IO. All rights reserved. |
| */ |
| |
| #include <linux/fs.h> |
| #include <linux/mount.h> |
| #include <linux/pseudo_fs.h> |
| #include <linux/magic.h> |
| #include "btrfs-tests.h" |
| #include "../ctree.h" |
| #include "../free-space-cache.h" |
| #include "../free-space-tree.h" |
| #include "../transaction.h" |
| #include "../volumes.h" |
| #include "../disk-io.h" |
| #include "../qgroup.h" |
| #include "../block-group.h" |
| |
| static struct vfsmount *test_mnt = NULL; |
| |
| const char *test_error[] = { |
| [TEST_ALLOC_FS_INFO] = "cannot allocate fs_info", |
| [TEST_ALLOC_ROOT] = "cannot allocate root", |
| [TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer", |
| [TEST_ALLOC_PATH] = "cannot allocate path", |
| [TEST_ALLOC_INODE] = "cannot allocate inode", |
| [TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group", |
| [TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map", |
| }; |
| |
| static const struct super_operations btrfs_test_super_ops = { |
| .alloc_inode = btrfs_alloc_inode, |
| .destroy_inode = btrfs_test_destroy_inode, |
| }; |
| |
| |
| static int btrfs_test_init_fs_context(struct fs_context *fc) |
| { |
| struct pseudo_fs_context *ctx = init_pseudo(fc, BTRFS_TEST_MAGIC); |
| if (!ctx) |
| return -ENOMEM; |
| ctx->ops = &btrfs_test_super_ops; |
| return 0; |
| } |
| |
| static struct file_system_type test_type = { |
| .name = "btrfs_test_fs", |
| .init_fs_context = btrfs_test_init_fs_context, |
| .kill_sb = kill_anon_super, |
| }; |
| |
| struct inode *btrfs_new_test_inode(void) |
| { |
| struct inode *inode; |
| |
| inode = new_inode(test_mnt->mnt_sb); |
| if (!inode) |
| return NULL; |
| |
| inode->i_mode = S_IFREG; |
| inode->i_ino = BTRFS_FIRST_FREE_OBJECTID; |
| BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY; |
| BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID; |
| BTRFS_I(inode)->location.offset = 0; |
| inode_init_owner(&init_user_ns, inode, NULL, S_IFREG); |
| |
| return inode; |
| } |
| |
| static int btrfs_init_test_fs(void) |
| { |
| int ret; |
| |
| ret = register_filesystem(&test_type); |
| if (ret) { |
| printk(KERN_ERR "btrfs: cannot register test file system\n"); |
| return ret; |
| } |
| |
| test_mnt = kern_mount(&test_type); |
| if (IS_ERR(test_mnt)) { |
| printk(KERN_ERR "btrfs: cannot mount test file system\n"); |
| unregister_filesystem(&test_type); |
| return PTR_ERR(test_mnt); |
| } |
| return 0; |
| } |
| |
| static void btrfs_destroy_test_fs(void) |
| { |
| kern_unmount(test_mnt); |
| unregister_filesystem(&test_type); |
| } |
| |
| struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info) |
| { |
| struct btrfs_device *dev; |
| |
| dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| if (!dev) |
| return ERR_PTR(-ENOMEM); |
| |
| extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL); |
| INIT_LIST_HEAD(&dev->dev_list); |
| list_add(&dev->dev_list, &fs_info->fs_devices->devices); |
| |
| return dev; |
| } |
| |
| static void btrfs_free_dummy_device(struct btrfs_device *dev) |
| { |
| extent_io_tree_release(&dev->alloc_state); |
| kfree(dev); |
| } |
| |
| struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize) |
| { |
| struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info), |
| GFP_KERNEL); |
| |
| if (!fs_info) |
| return fs_info; |
| fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices), |
| GFP_KERNEL); |
| if (!fs_info->fs_devices) { |
| kfree(fs_info); |
| return NULL; |
| } |
| INIT_LIST_HEAD(&fs_info->fs_devices->devices); |
| |
| fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block), |
| GFP_KERNEL); |
| if (!fs_info->super_copy) { |
| kfree(fs_info->fs_devices); |
| kfree(fs_info); |
| return NULL; |
| } |
| |
| btrfs_init_fs_info(fs_info); |
| |
| fs_info->nodesize = nodesize; |
| fs_info->sectorsize = sectorsize; |
| fs_info->sectorsize_bits = ilog2(sectorsize); |
| set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); |
| |
| test_mnt->mnt_sb->s_fs_info = fs_info; |
| |
| return fs_info; |
| } |
| |
| void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) |
| { |
| struct radix_tree_iter iter; |
| void **slot; |
| struct btrfs_device *dev, *tmp; |
| |
| if (!fs_info) |
| return; |
| |
| if (WARN_ON(!test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, |
| &fs_info->fs_state))) |
| return; |
| |
| test_mnt->mnt_sb->s_fs_info = NULL; |
| |
| spin_lock(&fs_info->buffer_lock); |
| radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) { |
| struct extent_buffer *eb; |
| |
| eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock); |
| if (!eb) |
| continue; |
| /* Shouldn't happen but that kind of thinking creates CVE's */ |
| if (radix_tree_exception(eb)) { |
| if (radix_tree_deref_retry(eb)) |
| slot = radix_tree_iter_retry(&iter); |
| continue; |
| } |
| slot = radix_tree_iter_resume(slot, &iter); |
| spin_unlock(&fs_info->buffer_lock); |
| free_extent_buffer_stale(eb); |
| spin_lock(&fs_info->buffer_lock); |
| } |
| spin_unlock(&fs_info->buffer_lock); |
| |
| btrfs_mapping_tree_free(&fs_info->mapping_tree); |
| list_for_each_entry_safe(dev, tmp, &fs_info->fs_devices->devices, |
| dev_list) { |
| btrfs_free_dummy_device(dev); |
| } |
| btrfs_free_qgroup_config(fs_info); |
| btrfs_free_fs_roots(fs_info); |
| kfree(fs_info->super_copy); |
| btrfs_check_leaked_roots(fs_info); |
| btrfs_extent_buffer_leak_debug_check(fs_info); |
| kfree(fs_info->fs_devices); |
| kfree(fs_info); |
| } |
| |
| void btrfs_free_dummy_root(struct btrfs_root *root) |
| { |
| if (IS_ERR_OR_NULL(root)) |
| return; |
| /* Will be freed by btrfs_free_fs_roots */ |
| if (WARN_ON(test_bit(BTRFS_ROOT_IN_RADIX, &root->state))) |
| return; |
| btrfs_global_root_delete(root); |
| btrfs_put_root(root); |
| } |
| |
| struct btrfs_block_group * |
| btrfs_alloc_dummy_block_group(struct btrfs_fs_info *fs_info, |
| unsigned long length) |
| { |
| struct btrfs_block_group *cache; |
| |
| cache = kzalloc(sizeof(*cache), GFP_KERNEL); |
| if (!cache) |
| return NULL; |
| cache->free_space_ctl = kzalloc(sizeof(*cache->free_space_ctl), |
| GFP_KERNEL); |
| if (!cache->free_space_ctl) { |
| kfree(cache); |
| return NULL; |
| } |
| |
| cache->start = 0; |
| cache->length = length; |
| cache->full_stripe_len = fs_info->sectorsize; |
| cache->fs_info = fs_info; |
| |
| INIT_LIST_HEAD(&cache->list); |
| INIT_LIST_HEAD(&cache->cluster_list); |
| INIT_LIST_HEAD(&cache->bg_list); |
| btrfs_init_free_space_ctl(cache, cache->free_space_ctl); |
| mutex_init(&cache->free_space_lock); |
| |
| return cache; |
| } |
| |
| void btrfs_free_dummy_block_group(struct btrfs_block_group *cache) |
| { |
| if (!cache) |
| return; |
| btrfs_remove_free_space_cache(cache); |
| kfree(cache->free_space_ctl); |
| kfree(cache); |
| } |
| |
| void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans, |
| struct btrfs_fs_info *fs_info) |
| { |
| memset(trans, 0, sizeof(*trans)); |
| trans->transid = 1; |
| trans->type = __TRANS_DUMMY; |
| trans->fs_info = fs_info; |
| } |
| |
| int btrfs_run_sanity_tests(void) |
| { |
| int ret, i; |
| u32 sectorsize, nodesize; |
| u32 test_sectorsize[] = { |
| PAGE_SIZE, |
| }; |
| ret = btrfs_init_test_fs(); |
| if (ret) |
| return ret; |
| for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) { |
| sectorsize = test_sectorsize[i]; |
| for (nodesize = sectorsize; |
| nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE; |
| nodesize <<= 1) { |
| pr_info("BTRFS: selftest: sectorsize: %u nodesize: %u\n", |
| sectorsize, nodesize); |
| ret = btrfs_test_free_space_cache(sectorsize, nodesize); |
| if (ret) |
| goto out; |
| ret = btrfs_test_extent_buffer_operations(sectorsize, |
| nodesize); |
| if (ret) |
| goto out; |
| ret = btrfs_test_extent_io(sectorsize, nodesize); |
| if (ret) |
| goto out; |
| ret = btrfs_test_inodes(sectorsize, nodesize); |
| if (ret) |
| goto out; |
| ret = btrfs_test_qgroups(sectorsize, nodesize); |
| if (ret) |
| goto out; |
| ret = btrfs_test_free_space_tree(sectorsize, nodesize); |
| if (ret) |
| goto out; |
| } |
| } |
| ret = btrfs_test_extent_map(); |
| |
| out: |
| btrfs_destroy_test_fs(); |
| return ret; |
| } |