Viewing: lustre_handles.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#ifndef __LUSTRE_HANDLES_H_
#define __LUSTRE_HANDLES_H_
/** \defgroup handles handles
*
* @{
*/
#include <linux/rcupdate.h>
#include <linux/refcount.h>
#include <linux/spinlock.h>
/* These handles are most easily used by having them appear at the very top of
* whatever object that you want to make handles for. ie:
*
* struct ldlm_lock {
* struct portals_handle handle;
* ...
* };
*
* Now you're able to assign the results of cookie2handle directly to an
* ldlm_lock. If it's not at the top, you'll want to use container_of()
* to compute the start of the structure based on the handle field. */
struct portals_handle {
struct hlist_node h_link;
__u64 h_cookie;
const char *h_owner;
refcount_t h_ref;
struct rcu_head h_rcu;
};
/* handles.c */
/* Add a handle to the hash table */
void class_handle_hash(struct portals_handle *, const char *h_owner);
void class_handle_unhash(struct portals_handle *);
void *class_handle2object(u64 cookie, const char *h_owner);
int class_handle_init(void);
void class_handle_cleanup(void);
/** @} handles */
#endif
