Return to configfs.h CVS log

Up to [Development] / linux-2.6-xfs / include / linux

Update 2.6.x-xfs to 2.6.23-rc4.

Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:

--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
    xfs ioctl __user annotations

commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
    mm: Remove slab destructors from kmem_cache_create().

commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
    mm: fault feedback #1

commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
    mm: merge populate and nopage into fault (fixes nonlinear)

commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
    mm: fix fault vs invalidate race for linear mappings

commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
    knfsd: exportfs: add exportfs.h header

commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Freezer: make kernel threads nonfreezable by default

commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
    mm: clean up and kernelify shrinker registration

commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
    sendfile: remove .sendfile from filesystems that use generic_file_sendfile()

commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Add suspend-related notifications for CPU hotplug

commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
    Fix occurrences of "the the "

commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
    mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.

/* -*- 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.txt before using the
 * configfs interface, ESPECIALLY the parts about reference counts and
 * item destructors.
 */

#ifndef _CONFIGFS_H_
#define _CONFIGFS_H_

#ifdef __KERNEL__

#include <linux/types.h>
#include <linux/list.h>
#include <linux/kref.h>
#include <linux/mutex.h>

#include <asm/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;
	mode_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. They can use
 * this macro (similar to sysfs' __ATTR) to make defining attributes easier.
 */
#define __CONFIGFS_ATTR(_name, _mode, _show, _store)			\
{									\
	.attr	= {							\
			.ca_name = __stringify(_name),			\
			.ca_mode = _mode,				\
			.ca_owner = THIS_MODULE,			\
	},								\
	.show	= _show,						\
	.store	= _store,						\
}

/*
 * 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.  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 commited (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  /* __KERNEL__ */

#endif /* _CONFIGFS_H_ */