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Commit 805fab47 authored by Kay Sievers's avatar Kay Sievers Committed by Greg Kroah-Hartman
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CONFIG_SYSFS_DEPRECATED - class symlinks 



Turn off class symlinks CONFIG_SYSFS_DEPRECATED is enabled.

Signed-off-by: default avatarKay Sievers <kay.sievers@vrfy.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a87cb2ac

drivers/base/class.c

+98 −51
Original line number Diff line number Diff line
@@ -352,35 +352,104 @@ static const char *class_uevent_name(struct kset *kset, struct kobject *kobj) 
	return class_dev->class->name;

}



static int class_uevent(struct kset *kset, struct kobject *kobj, char **envp,

			 int num_envp, char *buffer, int buffer_size)

#ifdef CONFIG_SYSFS_DEPRECATED

char *make_class_name(const char *name, struct kobject *kobj)

{

	struct class_device *class_dev = to_class_dev(kobj);

	int i = 0;

	int length = 0;

	int retval = 0;

	char *class_name;

	int size;



	pr_debug("%s - name = %s\n", __FUNCTION__, class_dev->class_id);

	size = strlen(name) + strlen(kobject_name(kobj)) + 2;



	if (class_dev->dev) {

		/* add device, backing this class device (deprecated) */

	class_name = kmalloc(size, GFP_KERNEL);

	if (!class_name)

		return ERR_PTR(-ENOMEM);



	strcpy(class_name, name);

	strcat(class_name, ":");

	strcat(class_name, kobject_name(kobj));

	return class_name;

}



static int deprecated_class_uevent(char **envp, int num_envp, int *cur_index,

				   char *buffer, int buffer_size,

				   int *cur_len,

				   struct class_device *class_dev)

{

	struct device *dev = class_dev->dev;

		char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);

	char *path;



		add_uevent_var(envp, num_envp, &i, buffer, buffer_size,

			       &length, "PHYSDEVPATH=%s", path);

	if (!dev)

		return 0;



	/* add device, backing this class device (deprecated) */

	path = kobject_get_path(&dev->kobj, GFP_KERNEL);



	add_uevent_var(envp, num_envp, cur_index, buffer, buffer_size,

		       cur_len, "PHYSDEVPATH=%s", path);

	kfree(path);



	if (dev->bus)

			add_uevent_var(envp, num_envp, &i,

				       buffer, buffer_size, &length,

		add_uevent_var(envp, num_envp, cur_index,

			       buffer, buffer_size, cur_len,

			       "PHYSDEVBUS=%s", dev->bus->name);



	if (dev->driver)

			add_uevent_var(envp, num_envp, &i,

				       buffer, buffer_size, &length,

		add_uevent_var(envp, num_envp, cur_index,

			       buffer, buffer_size, cur_len,

			       "PHYSDEVDRIVER=%s", dev->driver->name);

	return 0;

}



static int make_deprecated_class_device_links(struct class_device *class_dev)

{

	char *class_name;

	int error;



	if (!class_dev->dev)

		return 0;



	class_name = make_class_name(class_dev->class->name, &class_dev->kobj);

	error = sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj,

				  class_name);

	kfree(class_name);

	return error;

}



static void remove_deprecated_class_device_links(struct class_device *class_dev)

{

	char *class_name;



	if (!class_dev->dev)

		return;



	class_name = make_class_name(class_dev->class->name, &class_dev->kobj);

	sysfs_remove_link(&class_dev->dev->kobj, class_name);

	kfree(class_name);

}

#else

static inline int deprecated_class_uevent(char **envp, int num_envp,

					  int *cur_index, char *buffer,

					  int buffer_size, int *cur_len,

					  struct class_device *class_dev)

{ return 0; }

static inline int make_deprecated_class_device_links(struct class_device *cd)

{ return 0; }

static void remove_deprecated_class_device_links(struct class_device *cd)

{ }

#endif



static int class_uevent(struct kset *kset, struct kobject *kobj, char **envp,

			 int num_envp, char *buffer, int buffer_size)

{

	struct class_device *class_dev = to_class_dev(kobj);

	int i = 0;

	int length = 0;

	int retval = 0;



	pr_debug("%s - name = %s\n", __FUNCTION__, class_dev->class_id);



	deprecated_class_uevent(envp, num_envp, &i, buffer, buffer_size,

				&length, class_dev);



	if (MAJOR(class_dev->devt)) {

		add_uevent_var(envp, num_envp, &i,
@@ -506,29 +575,11 @@ void class_device_initialize(struct class_device *class_dev) 
	INIT_LIST_HEAD(&class_dev->node);

}



char *make_class_name(const char *name, struct kobject *kobj)

{

	char *class_name;

	int size;



	size = strlen(name) + strlen(kobject_name(kobj)) + 2;



	class_name = kmalloc(size, GFP_KERNEL);

	if (!class_name)

		return ERR_PTR(-ENOMEM);



	strcpy(class_name, name);

	strcat(class_name, ":");

	strcat(class_name, kobject_name(kobj));

	return class_name;

}



int class_device_add(struct class_device *class_dev)

{

	struct class *parent_class = NULL;

	struct class_device *parent_class_dev = NULL;

	struct class_interface *class_intf;

	char *class_name = NULL;

	int error = -EINVAL;



	class_dev = class_device_get(class_dev);
@@ -599,19 +650,17 @@ int class_device_add(struct class_device *class_dev) 
		goto out5;



	if (class_dev->dev) {

		class_name = make_class_name(class_dev->class->name,

					     &class_dev->kobj);

		error = sysfs_create_link(&class_dev->kobj,

					  &class_dev->dev->kobj, "device");

		if (error)

			goto out6;

		error = sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj,

					  class_name);

		if (error)

			goto out7;

	}



	error = class_device_add_groups(class_dev);

	if (error)

		goto out7;



	error = make_deprecated_class_device_links(class_dev);

	if (error)

		goto out8;
@@ -629,8 +678,7 @@ int class_device_add(struct class_device *class_dev) 
	goto out1;



 out8:

	if (class_dev->dev)

		sysfs_remove_link(&class_dev->kobj, class_name);

	class_device_remove_groups(class_dev);

 out7:

	if (class_dev->dev)

		sysfs_remove_link(&class_dev->kobj, "device");
@@ -649,7 +697,6 @@ int class_device_add(struct class_device *class_dev) 
	class_put(parent_class);

 out1:

	class_device_put(class_dev);

	kfree(class_name);

	return error;

}
@@ -726,7 +773,6 @@ void class_device_del(struct class_device *class_dev) 
	struct class *parent_class = class_dev->class;

	struct class_device *parent_device = class_dev->parent;

	struct class_interface *class_intf;

	char *class_name = NULL;



	if (parent_class) {

		down(&parent_class->sem);
@@ -738,10 +784,8 @@ void class_device_del(struct class_device *class_dev) 
	}



	if (class_dev->dev) {

		class_name = make_class_name(class_dev->class->name,

					     &class_dev->kobj);

		remove_deprecated_class_device_links(class_dev);

		sysfs_remove_link(&class_dev->kobj, "device");

		sysfs_remove_link(&class_dev->dev->kobj, class_name);

	}

	sysfs_remove_link(&class_dev->kobj, "subsystem");

	class_device_remove_file(class_dev, &class_dev->uevent_attr);
@@ -755,7 +799,6 @@ void class_device_del(struct class_device *class_dev) 


	class_device_put(parent_device);

	class_put(parent_class);

	kfree(class_name);

}



void class_device_unregister(struct class_device *class_dev)
@@ -804,14 +847,17 @@ int class_device_rename(struct class_device *class_dev, char *new_name) 
	pr_debug("CLASS: renaming '%s' to '%s'\n", class_dev->class_id,

		 new_name);



#ifdef CONFIG_SYSFS_DEPRECATED

	if (class_dev->dev)

		old_class_name = make_class_name(class_dev->class->name,

						 &class_dev->kobj);

#endif



	strlcpy(class_dev->class_id, new_name, KOBJ_NAME_LEN);



	error = kobject_rename(&class_dev->kobj, new_name);



#ifdef CONFIG_SYSFS_DEPRECATED

	if (class_dev->dev) {

		new_class_name = make_class_name(class_dev->class->name,

						 &class_dev->kobj);
@@ -819,6 +865,7 @@ int class_device_rename(struct class_device *class_dev, char *new_name) 
				  new_class_name);

		sysfs_remove_link(&class_dev->dev->kobj, old_class_name);

	}

#endif

	class_device_put(class_dev);



	kfree(old_class_name);