configfs: remove old API

Remove the old show_attribute and store_attribute methods and update
the documentation.  Also replace the two C samples with a single new
one in the proper samples directory where people expect to find it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 0 insertions, 82 deletions

diff --git a/include/linux/configfs.h b/include/linux/configfs.h
index 85e9956a86de..a8a335b7fce0 100644
--- a/include/linux/configfs.h
+++ b/include/linux/configfs.h
@@ -155,86 +155,6 @@ static struct configfs_attribute _pfx##attr_##_name = {	\
 }
 
 /*
- * Users often need to create attribute structures for their configurable
- * attributes, containing a configfs_attribute member and function pointers
- * for the show() and store() operations on that attribute. If they don't
- * need anything else on the extended attribute structure, they can use
- * this macro to define it  The argument _item is the name of the
- * config_item structure.
- */
-#define CONFIGFS_ATTR_STRUCT(_item)					\
-struct _item##_attribute {						\
-	struct configfs_attribute attr;					\
-	ssize_t (*show)(struct _item *, char *);			\
-	ssize_t (*store)(struct _item *, const char *, size_t);		\
-}
-
-/*
- * With the extended attribute structure, users can use this macro
- * (similar to sysfs' __ATTR) to make defining attributes easier.
- * An example:
- * #define MYITEM_ATTR(_name, _mode, _show, _store)	\
- * struct myitem_attribute childless_attr_##_name =	\
- *         __CONFIGFS_ATTR(_name, _mode, _show, _store)
- */
-#define __CONFIGFS_ATTR(_name, _mode, _show, _store)			\
-{									\
-	.attr	= {							\
-			.ca_name = __stringify(_name),			\
-			.ca_mode = _mode,				\
-			.ca_owner = THIS_MODULE,			\
-	},								\
-	.show	= _show,						\
-	.store	= _store,						\
-}
-/* Here is a readonly version, only requiring a show() operation */
-#define __CONFIGFS_ATTR_RO(_name, _show)				\
-{									\
-	.attr	= {							\
-			.ca_name = __stringify(_name),			\
-			.ca_mode = 0444,				\
-			.ca_owner = THIS_MODULE,			\
-	},								\
-	.show	= _show,						\
-}
-
-/*
- * With these extended attributes, the simple show_attribute() and
- * store_attribute() operations need to call the show() and store() of the
- * attributes.  This is a common pattern, so we provide a macro to define
- * them.  The argument _item is the name of the config_item structure.
- * This macro expects the attributes to be named "struct <name>_attribute"
- * and the function to_<name>() to exist;
- */
-#define CONFIGFS_ATTR_OPS(_item)					\
-static ssize_t _item##_attr_show(struct config_item *item,		\
-				 struct configfs_attribute *attr,	\
-				 char *page)				\
-{									\
-	struct _item *_item = to_##_item(item);				\
-	struct _item##_attribute *_item##_attr =			\
-		container_of(attr, struct _item##_attribute, attr);	\
-	ssize_t ret = 0;						\
-									\
-	if (_item##_attr->show)						\
-		ret = _item##_attr->show(_item, page);			\
-	return ret;							\
-}									\
-static ssize_t _item##_attr_store(struct config_item *item,		\
-				  struct configfs_attribute *attr,	\
-				  const char *page, size_t count)	\
-{									\
-	struct _item *_item = to_##_item(item);				\
-	struct _item##_attribute *_item##_attr =			\
-		container_of(attr, struct _item##_attribute, attr);	\
-	ssize_t ret = -EINVAL;						\
-									\
-	if (_item##_attr->store)					\
-		ret = _item##_attr->store(_item, page, count);		\
-	return ret;							\
-}
-
-/*
  * If allow_link() exists, the item can symlink(2) out to other
  * items.  If the item is a group, it may support mkdir(2).
  * Groups supply one of make_group() and make_item().  If the
@@ -250,8 +170,6 @@ static ssize_t _item##_attr_store(struct config_item *item,		\
  */
 struct configfs_item_operations {
 	void (*release)(struct config_item *);
-	ssize_t	(*show_attribute)(struct config_item *, struct configfs_attribute *,char *);
-	ssize_t	(*store_attribute)(struct config_item *,struct configfs_attribute *,const char *, size_t);
 	int (*allow_link)(struct config_item *src, struct config_item *target);
 	int (*drop_link)(struct config_item *src, struct config_item *target);
 };