struct dentry *ci_dentry;
};
-extern int config_item_set_name(struct config_item *, const char *, ...);
+extern __printf(2, 3)
+int config_item_set_name(struct config_item *, const char *, ...);
static inline char *config_item_name(struct config_item * item)
{
return item->ci_name;
}
-extern void config_item_init(struct config_item *);
extern void config_item_init_type_name(struct config_item *item,
const char *name,
struct config_item_type *type);
const char *ca_name;
struct module *ca_owner;
umode_t ca_mode;
+ ssize_t (*show)(struct config_item *, char *);
+ ssize_t (*store)(struct config_item *, const char *, size_t);
};
-/*
- * 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); \
+#define CONFIGFS_ATTR(_pfx, _name) \
+static struct configfs_attribute _pfx##attr_##_name = { \
+ .ca_name = __stringify(_name), \
+ .ca_mode = S_IRUGO | S_IWUSR, \
+ .ca_owner = THIS_MODULE, \
+ .show = _pfx##_name##_show, \
+ .store = _pfx##_name##_store, \
}
-/*
- * 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, \
+#define CONFIGFS_ATTR_RO(_pfx, _name) \
+static struct configfs_attribute _pfx##attr_##_name = { \
+ .ca_name = __stringify(_name), \
+ .ca_mode = S_IRUGO, \
+ .ca_owner = THIS_MODULE, \
+ .show = _pfx##_name##_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; \
+#define CONFIGFS_ATTR_WO(_pfx, _name) \
+static struct configfs_attribute _pfx##attr_##_name = { \
+ .ca_name = __stringify(_name), \
+ .ca_mode = S_IWUSR, \
+ .ca_owner = THIS_MODULE, \
+ .store = _pfx##_name##_store, \
}
/*
*/
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);
};
int configfs_register_subsystem(struct configfs_subsystem *subsys);
void configfs_unregister_subsystem(struct configfs_subsystem *subsys);
+int configfs_register_group(struct config_group *parent_group,
+ struct config_group *group);
+void configfs_unregister_group(struct config_group *group);
+
+struct config_group *
+configfs_register_default_group(struct config_group *parent_group,
+ const char *name,
+ struct config_item_type *item_type);
+void configfs_unregister_default_group(struct config_group *group);
+
/* These functions can sleep and can alloc with GFP_KERNEL */
/* WARNING: These cannot be called underneath configfs callbacks!! */
int configfs_depend_item(struct configfs_subsystem *subsys, struct config_item *target);
Code Review / kvmfornfv.git / blobdiff