1 files changed, 52 insertions, 27 deletions

diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 1a2f6f6a4d9..f6c28583339 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -29,6 +29,7 @@
 #include <linux/mount.h>
 #include <linux/pagemap.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 
 #include <linux/configfs.h>
 #include "configfs_internal.h"
@@ -36,11 +37,11 @@
 /* Random magic number */
 #define CONFIGFS_MAGIC 0x62656570
 
-struct vfsmount * configfs_mount = NULL;
-struct super_block * configfs_sb = NULL;
+static struct vfsmount *configfs_mount = NULL;
+struct kmem_cache *configfs_dir_cachep;
 static int configfs_mnt_count = 0;
 
-static struct super_operations configfs_ops = {
+static const struct super_operations configfs_ops = {
 	.statfs		= simple_statfs,
 	.drop_inode	= generic_delete_inode,
 };
@@ -62,6 +63,7 @@ static struct configfs_dirent configfs_root = {
 	.s_children	= LIST_HEAD_INIT(configfs_root.s_children),
 	.s_element	= &configfs_root_group.cg_item,
 	.s_type		= CONFIGFS_ROOT,
+	.s_iattr	= NULL,
 };
 
 static int configfs_fill_super(struct super_block *sb, void *data, int silent)
@@ -73,49 +75,52 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
 	sb->s_magic = CONFIGFS_MAGIC;
 	sb->s_op = &configfs_ops;
-	configfs_sb = sb;
+	sb->s_time_gran = 1;
 
-	inode = configfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO);
+	inode = configfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
+				   &configfs_root, sb);
 	if (inode) {
-		inode->i_op = &configfs_dir_inode_operations;
+		inode->i_op = &configfs_root_inode_operations;
 		inode->i_fop = &configfs_dir_operations;
 		/* directory inodes start off with i_nlink == 2 (for "." entry) */
-		inode->i_nlink++;
+		inc_nlink(inode);
 	} else {
-		pr_debug("configfs: could not get root inode\n");
+		pr_debug("could not get root inode\n");
 		return -ENOMEM;
 	}
 
-	root = d_alloc_root(inode);
+	root = d_make_root(inode);
 	if (!root) {
-		pr_debug("%s: could not get root dentry!\n",__FUNCTION__);
-		iput(inode);
+		pr_debug("%s: could not get root dentry!\n",__func__);
 		return -ENOMEM;
 	}
 	config_group_init(&configfs_root_group);
 	configfs_root_group.cg_item.ci_dentry = root;
 	root->d_fsdata = &configfs_root;
 	sb->s_root = root;
+	sb->s_d_op = &configfs_dentry_ops; /* the rest get that */
 	return 0;
 }
 
-static struct super_block *configfs_get_sb(struct file_system_type *fs_type,
+static struct dentry *configfs_do_mount(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data)
 {
-	return get_sb_single(fs_type, flags, data, configfs_fill_super);
+	return mount_single(fs_type, flags, data, configfs_fill_super);
 }
 
 static struct file_system_type configfs_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "configfs",
-	.get_sb		= configfs_get_sb,
+	.mount		= configfs_do_mount,
 	.kill_sb	= kill_litter_super,
 };
+MODULE_ALIAS_FS("configfs");
 
-int configfs_pin_fs(void)
+struct dentry *configfs_pin_fs(void)
 {
-	return simple_pin_fs("configfs", &configfs_mount,
+	int err = simple_pin_fs(&configfs_fs_type, &configfs_mount,
 			     &configfs_mnt_count);
+	return err ? ERR_PTR(err) : configfs_mount->mnt_root;
 }
 
 void configfs_release_fs(void)
@@ -124,35 +129,55 @@ void configfs_release_fs(void)
 }
 
 
-static decl_subsys(config, NULL, NULL);
+static struct kobject *config_kobj;
 
 static int __init configfs_init(void)
 {
-	int err;
+	int err = -ENOMEM;
 
-	kset_set_kset_s(&config_subsys, kernel_subsys);
-	err = subsystem_register(&config_subsys);
+	configfs_dir_cachep = kmem_cache_create("configfs_dir_cache",
+						sizeof(struct configfs_dirent),
+						0, 0, NULL);
+	if (!configfs_dir_cachep)
+		goto out;
+
+	config_kobj = kobject_create_and_add("config", kernel_kobj);
+	if (!config_kobj)
+		goto out2;
+
+	err = configfs_inode_init();
 	if (err)
-		return err;
+		goto out3;
 
 	err = register_filesystem(&configfs_fs_type);
-	if (err) {
-		printk(KERN_ERR "configfs: Unable to register filesystem!\n");
-		subsystem_unregister(&config_subsys);
-	}
+	if (err)
+		goto out4;
 
+	return 0;
+out4:
+	pr_err("Unable to register filesystem!\n");
+	configfs_inode_exit();
+out3:
+	kobject_put(config_kobj);
+out2:
+	kmem_cache_destroy(configfs_dir_cachep);
+	configfs_dir_cachep = NULL;
+out:
 	return err;
 }
 
 static void __exit configfs_exit(void)
 {
 	unregister_filesystem(&configfs_fs_type);
-	subsystem_unregister(&config_subsys);
+	kobject_put(config_kobj);
+	kmem_cache_destroy(configfs_dir_cachep);
+	configfs_dir_cachep = NULL;
+	configfs_inode_exit();
 }
 
 MODULE_AUTHOR("Oracle");
 MODULE_LICENSE("GPL");
-MODULE_VERSION("0.0.1");
+MODULE_VERSION("0.0.2");
 MODULE_DESCRIPTION("Simple RAM filesystem for user driven kernel subsystem configuration.");
 
 module_init(configfs_init);