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-rw-r--r--fs/btrfs/tests/btrfs-tests.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
new file mode 100644
index 000000000..d43cb5242
--- /dev/null
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -0,0 +1,303 @@
+// 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;
+}