summaryrefslogtreecommitdiffstats
path: root/kernel/fs/btrfs/tests/btrfs-tests.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/fs/btrfs/tests/btrfs-tests.c')
-rw-r--r--kernel/fs/btrfs/tests/btrfs-tests.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/kernel/fs/btrfs/tests/btrfs-tests.c b/kernel/fs/btrfs/tests/btrfs-tests.c
new file mode 100644
index 000000000..9626252ee
--- /dev/null
+++ b/kernel/fs/btrfs/tests/btrfs-tests.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2013 Fusion IO. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/magic.h>
+#include "btrfs-tests.h"
+#include "../ctree.h"
+#include "../volumes.h"
+#include "../disk-io.h"
+#include "../qgroup.h"
+
+static struct vfsmount *test_mnt = NULL;
+
+static const struct super_operations btrfs_test_super_ops = {
+ .alloc_inode = btrfs_alloc_inode,
+ .destroy_inode = btrfs_test_destroy_inode,
+};
+
+static struct dentry *btrfs_test_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data)
+{
+ return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops,
+ NULL, BTRFS_TEST_MAGIC);
+}
+
+static struct file_system_type test_type = {
+ .name = "btrfs_test_fs",
+ .mount = btrfs_test_mount,
+ .kill_sb = kill_anon_super,
+};
+
+struct inode *btrfs_new_test_inode(void)
+{
+ return new_inode(test_mnt->mnt_sb);
+}
+
+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 ret;
+ }
+ return 0;
+}
+
+void btrfs_destroy_test_fs(void)
+{
+ kern_unmount(test_mnt);
+ unregister_filesystem(&test_type);
+}
+
+struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void)
+{
+ struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
+ GFP_NOFS);
+
+ if (!fs_info)
+ return fs_info;
+ fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
+ GFP_NOFS);
+ if (!fs_info->fs_devices) {
+ kfree(fs_info);
+ return NULL;
+ }
+ fs_info->super_copy = kzalloc(sizeof(struct btrfs_super_block),
+ GFP_NOFS);
+ if (!fs_info->super_copy) {
+ kfree(fs_info->fs_devices);
+ kfree(fs_info);
+ return NULL;
+ }
+
+ if (init_srcu_struct(&fs_info->subvol_srcu)) {
+ kfree(fs_info->fs_devices);
+ kfree(fs_info->super_copy);
+ kfree(fs_info);
+ return NULL;
+ }
+
+ spin_lock_init(&fs_info->buffer_lock);
+ spin_lock_init(&fs_info->qgroup_lock);
+ spin_lock_init(&fs_info->qgroup_op_lock);
+ spin_lock_init(&fs_info->super_lock);
+ spin_lock_init(&fs_info->fs_roots_radix_lock);
+ spin_lock_init(&fs_info->tree_mod_seq_lock);
+ mutex_init(&fs_info->qgroup_ioctl_lock);
+ mutex_init(&fs_info->qgroup_rescan_lock);
+ rwlock_init(&fs_info->tree_mod_log_lock);
+ fs_info->running_transaction = NULL;
+ fs_info->qgroup_tree = RB_ROOT;
+ fs_info->qgroup_ulist = NULL;
+ atomic64_set(&fs_info->tree_mod_seq, 0);
+ INIT_LIST_HEAD(&fs_info->dirty_qgroups);
+ INIT_LIST_HEAD(&fs_info->dead_roots);
+ INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
+ INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
+ INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
+ return fs_info;
+}
+
+static void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
+{
+ struct radix_tree_iter iter;
+ void **slot;
+
+ spin_lock(&fs_info->buffer_lock);
+restart:
+ 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))
+ goto restart;
+ continue;
+ }
+ spin_unlock(&fs_info->buffer_lock);
+ free_extent_buffer_stale(eb);
+ spin_lock(&fs_info->buffer_lock);
+ }
+ spin_unlock(&fs_info->buffer_lock);
+
+ btrfs_free_qgroup_config(fs_info);
+ btrfs_free_fs_roots(fs_info);
+ cleanup_srcu_struct(&fs_info->subvol_srcu);
+ kfree(fs_info->super_copy);
+ kfree(fs_info->fs_devices);
+ kfree(fs_info);
+}
+
+void btrfs_free_dummy_root(struct btrfs_root *root)
+{
+ if (!root)
+ return;
+ if (root->node)
+ free_extent_buffer(root->node);
+ if (root->fs_info)
+ btrfs_free_dummy_fs_info(root->fs_info);
+ kfree(root);
+}
+