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/*
 * transport_class.h - a generic container for all transport classes
 *
 * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
 *
 * This file is licensed under GPLv2
 */

#ifndef _TRANSPORT_CLASS_H_
#define _TRANSPORT_CLASS_H_

#include <linux/device.h>
#include <linux/bug.h>
#include <linux/attribute_container.h>

struct transport_container;

struct transport_class {
	struct class class;
	int (*setup)(struct transport_container *, struct device *,
		     struct device *);
	int (*configure)(struct transport_container *, struct device *,
			 struct device *);
	int (*remove)(struct transport_container *, struct device *,
		      struct device *);
};

#define DECLARE_TRANSPORT_CLASS(cls, nm, su, rm, cfg)			\
struct transport_class cls = {						\
	.class = {							\
		.name = nm,						\
	},								\
	.setup = su,							\
	.remove = rm,							\
	.configure = cfg,						\
}


struct anon_transport_class {
	struct transport_class tclass;
	struct attribute_container container;
};

#define DECLARE_ANON_TRANSPORT_CLASS(cls, mtch, cfg)		\
struct anon_transport_class cls = {				\
	.tclass = {						\
		.configure = cfg,				\
	},							\
	. container = {						\
		.match = mtch,					\
	},							\
}

#define class_to_transport_class(x) \
	container_of(x, struct transport_class, class)

struct transport_container {
	struct attribute_container ac;
	const struct attribute_group *statistics;
};

#define attribute_container_to_transport_container(x) \
	container_of(x, struct transport_container, ac)

void transport_remove_device(struct device *);
void transport_add_device(struct device *);
void transport_setup_device(struct device *);
void transport_configure_device(struct device *);
void transport_destroy_device(struct device *);

static inline void
transport_register_device(struct device *dev)
{
	transport_setup_device(dev);
	transport_add_device(dev);
}

static inline void
transport_unregister_device(struct device *dev)
{
	transport_remove_device(dev);
	transport_destroy_device(dev);
}

static inline int transport_container_register(struct transport_container *tc)
{
	return attribute_container_register(&tc->ac);
}

static inline void transport_container_unregister(struct transport_container *tc)
{
	if (unlikely(attribute_container_unregister(&tc->ac)))
		BUG();
}

int transport_class_register(struct transport_class *);
int anon_transport_class_register(struct anon_transport_class *);
void transport_class_unregister(struct transport_class *);
void anon_transport_class_unregister(struct anon_transport_class *);


#endif
s="o">= sysfs_root_kn; else parent = kobj->sd; if (!parent) return -EFAULT; return sysfs_do_create_link_sd(parent, target, name, warn); } /** * sysfs_create_link - create symlink between two objects. * @kobj: object whose directory we're creating the link in. * @target: object we're pointing to. * @name: name of the symlink. */ int sysfs_create_link(struct kobject *kobj, struct kobject *target, const char *name) { return sysfs_do_create_link(kobj, target, name, 1); } EXPORT_SYMBOL_GPL(sysfs_create_link); /** * sysfs_create_link_nowarn - create symlink between two objects. * @kobj: object whose directory we're creating the link in. * @target: object we're pointing to. * @name: name of the symlink. * * This function does the same as sysfs_create_link(), but it * doesn't warn if the link already exists. */ int sysfs_create_link_nowarn(struct kobject *kobj, struct kobject *target, const char *name) { return sysfs_do_create_link(kobj, target, name, 0); } /** * sysfs_delete_link - remove symlink in object's directory. * @kobj: object we're acting for. * @targ: object we're pointing to. * @name: name of the symlink to remove. * * Unlike sysfs_remove_link sysfs_delete_link has enough information * to successfully delete symlinks in tagged directories. */ void sysfs_delete_link(struct kobject *kobj, struct kobject *targ, const char *name) { const void *ns = NULL; /* * We don't own @target and it may be removed at any time. * Synchronize using sysfs_symlink_target_lock. See * sysfs_remove_dir() for details. */ spin_lock(&sysfs_symlink_target_lock); if (targ->sd && kernfs_ns_enabled(kobj->sd)) ns = targ->sd->ns; spin_unlock(&sysfs_symlink_target_lock); kernfs_remove_by_name_ns(kobj->sd, name, ns); } /** * sysfs_remove_link - remove symlink in object's directory. * @kobj: object we're acting for. * @name: name of the symlink to remove. */ void sysfs_remove_link(struct kobject *kobj, const char *name) { struct kernfs_node *parent = NULL; if (!kobj) parent = sysfs_root_kn; else parent = kobj->sd; kernfs_remove_by_name(parent, name); } EXPORT_SYMBOL_GPL(sysfs_remove_link); /** * sysfs_rename_link_ns - rename symlink in object's directory. * @kobj: object we're acting for. * @targ: object we're pointing to. * @old: previous name of the symlink. * @new: new name of the symlink. * @new_ns: new namespace of the symlink. * * A helper function for the common rename symlink idiom. */ int sysfs_rename_link_ns(struct kobject *kobj, struct kobject *targ, const char *old, const char *new, const void *new_ns) { struct kernfs_node *parent, *kn = NULL; const void *old_ns = NULL; int result; if (!kobj) parent = sysfs_root_kn; else parent = kobj->sd; if (targ->sd) old_ns = targ->sd->ns; result = -ENOENT; kn = kernfs_find_and_get_ns(parent, old, old_ns); if (!kn) goto out; result = -EINVAL; if (kernfs_type(kn) != KERNFS_LINK) goto out; if (kn->symlink.target_kn->priv != targ) goto out; result = kernfs_rename_ns(kn, parent, new, new_ns); out: kernfs_put(kn); return result; } EXPORT_SYMBOL_GPL(sysfs_rename_link_ns);