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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/configfs.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/linux/configfs.h')
-rw-r--r--ANDROID_3.4.5/include/linux/configfs.h260
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diff --git a/ANDROID_3.4.5/include/linux/configfs.h b/ANDROID_3.4.5/include/linux/configfs.h
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-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * configfs.h - definitions for the device driver filesystem
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
- * Based on sysfs:
- * sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
- *
- * Based on kobject.h:
- * Copyright (c) 2002-2003 Patrick Mochel
- * Copyright (c) 2002-2003 Open Source Development Labs
- *
- * configfs Copyright (C) 2005 Oracle. All rights reserved.
- *
- * Please read Documentation/filesystems/configfs/configfs.txt before using
- * the configfs interface, ESPECIALLY the parts about reference counts and
- * item destructors.
- */
-
-#ifndef _CONFIGFS_H_
-#define _CONFIGFS_H_
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/list.h>
-#include <linux/kref.h>
-#include <linux/mutex.h>
-#include <linux/err.h>
-
-#include <linux/atomic.h>
-
-#define CONFIGFS_ITEM_NAME_LEN 20
-
-struct module;
-
-struct configfs_item_operations;
-struct configfs_group_operations;
-struct configfs_attribute;
-struct configfs_subsystem;
-
-struct config_item {
- char *ci_name;
- char ci_namebuf[CONFIGFS_ITEM_NAME_LEN];
- struct kref ci_kref;
- struct list_head ci_entry;
- struct config_item *ci_parent;
- struct config_group *ci_group;
- struct config_item_type *ci_type;
- struct dentry *ci_dentry;
-};
-
-extern 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);
-
-extern struct config_item * config_item_get(struct config_item *);
-extern void config_item_put(struct config_item *);
-
-struct config_item_type {
- struct module *ct_owner;
- struct configfs_item_operations *ct_item_ops;
- struct configfs_group_operations *ct_group_ops;
- struct configfs_attribute **ct_attrs;
-};
-
-/**
- * group - a group of config_items of a specific type, belonging
- * to a specific subsystem.
- */
-struct config_group {
- struct config_item cg_item;
- struct list_head cg_children;
- struct configfs_subsystem *cg_subsys;
- struct config_group **default_groups;
-};
-
-extern void config_group_init(struct config_group *group);
-extern void config_group_init_type_name(struct config_group *group,
- const char *name,
- struct config_item_type *type);
-
-static inline struct config_group *to_config_group(struct config_item *item)
-{
- return item ? container_of(item,struct config_group,cg_item) : NULL;
-}
-
-static inline struct config_group *config_group_get(struct config_group *group)
-{
- return group ? to_config_group(config_item_get(&group->cg_item)) : NULL;
-}
-
-static inline void config_group_put(struct config_group *group)
-{
- config_item_put(&group->cg_item);
-}
-
-extern struct config_item *config_group_find_item(struct config_group *,
- const char *);
-
-
-struct configfs_attribute {
- const char *ca_name;
- struct module *ca_owner;
- umode_t ca_mode;
-};
-
-/*
- * 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
- * group supports make_group(), one can create group children. If it
- * supports make_item(), one can create config_item children. make_group()
- * and make_item() return ERR_PTR() on errors. If it has
- * default_groups on group->default_groups, it has automatically created
- * group children. default_groups may coexist alongsize make_group() or
- * make_item(), but if the group wishes to have only default_groups
- * children (disallowing mkdir(2)), it need not provide either function.
- * If the group has commit(), it supports pending and committed (active)
- * items.
- */
-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);
-};
-
-struct configfs_group_operations {
- struct config_item *(*make_item)(struct config_group *group, const char *name);
- struct config_group *(*make_group)(struct config_group *group, const char *name);
- int (*commit_item)(struct config_item *item);
- void (*disconnect_notify)(struct config_group *group, struct config_item *item);
- void (*drop_item)(struct config_group *group, struct config_item *item);
-};
-
-struct configfs_subsystem {
- struct config_group su_group;
- struct mutex su_mutex;
-};
-
-static inline struct configfs_subsystem *to_configfs_subsystem(struct config_group *group)
-{
- return group ?
- container_of(group, struct configfs_subsystem, su_group) :
- NULL;
-}
-
-int configfs_register_subsystem(struct configfs_subsystem *subsys);
-void configfs_unregister_subsystem(struct configfs_subsystem *subsys);
-
-/* 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);
-void configfs_undepend_item(struct configfs_subsystem *subsys, struct config_item *target);
-
-#endif /* _CONFIGFS_H_ */