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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* 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 version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/obdclass/lu_object.c
*
* Lustre Object.
* These are the only exported functions, they provide some generic
* infrastructure for managing object devices
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
*/
#define DEBUG_SUBSYSTEM S_CLASS
#include <linux/libcfs/libcfs.h>
#include <obd_support.h>
#include <lu_object.h>
#include <md_object.h>
/* context key constructor/destructor: lu_ucred_key_init, lu_ucred_key_fini */
LU_KEY_INIT_FINI(lu_ucred, struct lu_ucred);
static struct lu_context_key lu_ucred_key = {
.lct_tags = LCT_SESSION,
.lct_init = lu_ucred_key_init,
.lct_fini = lu_ucred_key_fini
};
/**
* Get ucred key if session exists and ucred key is allocated on it.
* Return NULL otherwise.
*/
struct lu_ucred *lu_ucred(const struct lu_env *env)
{
if (!env->le_ses)
return NULL;
return lu_context_key_get(env->le_ses, &lu_ucred_key);
}
EXPORT_SYMBOL(lu_ucred);
/**
* Get ucred key and check if it is properly initialized.
* Return NULL otherwise.
*/
struct lu_ucred *lu_ucred_check(const struct lu_env *env)
{
struct lu_ucred *uc = lu_ucred(env);
if (uc && uc->uc_valid != UCRED_OLD && uc->uc_valid != UCRED_NEW)
return NULL;
return uc;
}
EXPORT_SYMBOL(lu_ucred_check);
/**
* Get ucred key, which must exist and must be properly initialized.
* Assert otherwise.
*/
struct lu_ucred *lu_ucred_assert(const struct lu_env *env)
{
struct lu_ucred *uc = lu_ucred_check(env);
LASSERT(uc != NULL);
return uc;
}
EXPORT_SYMBOL(lu_ucred_assert);
int lu_ucred_global_init(void)
{
LU_CONTEXT_KEY_INIT(&lu_ucred_key);
return lu_context_key_register(&lu_ucred_key);
}
void lu_ucred_global_fini(void)
{
lu_context_key_degister(&lu_ucred_key);
}
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