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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, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/ptlrpc/gss/gss_rawobj.c
*
* Author: Eric Mei <ericm@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_SEC
#include <linux/mutex.h>
#include <obd.h>
#include <obd_class.h>
#include <obd_support.h>
#include <lustre_sec.h>
#include "gss_internal.h"
int rawobj_empty(rawobj_t *obj)
{
LASSERT(equi(obj->len, obj->data));
return (obj->len == 0);
}
int rawobj_alloc(rawobj_t *obj, char *buf, int len)
{
LASSERT(obj);
LASSERT(len >= 0);
obj->len = len;
if (len) {
OBD_ALLOC_LARGE(obj->data, len);
if (!obj->data) {
obj->len = 0;
return -ENOMEM;
}
memcpy(obj->data, buf, len);
} else
obj->data = NULL;
return 0;
}
void rawobj_free(rawobj_t *obj)
{
LASSERT(obj);
if (obj->len) {
LASSERT(obj->data);
OBD_FREE_LARGE(obj->data, obj->len);
obj->len = 0;
obj->data = NULL;
} else
LASSERT(!obj->data);
}
int rawobj_equal(rawobj_t *a, rawobj_t *b)
{
LASSERT(a && b);
return (a->len == b->len &&
(!a->len || !memcmp(a->data, b->data, a->len)));
}
int rawobj_dup(rawobj_t *dest, rawobj_t *src)
{
LASSERT(src && dest);
dest->len = src->len;
if (dest->len) {
OBD_ALLOC_LARGE(dest->data, dest->len);
if (!dest->data) {
dest->len = 0;
return -ENOMEM;
}
memcpy(dest->data, src->data, dest->len);
} else
dest->data = NULL;
return 0;
}
int rawobj_serialize(rawobj_t *obj, __u32 **buf, __u32 *buflen)
{
__u32 len;
LASSERT(obj);
LASSERT(buf);
LASSERT(buflen);
len = cfs_size_round4(obj->len);
if (*buflen < 4 + len) {
CERROR("buflen %u < %u\n", *buflen, 4 + len);
return -EINVAL;
}
*(*buf)++ = cpu_to_le32(obj->len);
memcpy(*buf, obj->data, obj->len);
*buf += (len >> 2);
*buflen -= (4 + len);
return 0;
}
static int __rawobj_extract(rawobj_t *obj, __u32 **buf, __u32 *buflen,
int alloc, int local)
{
__u32 len;
if (*buflen < sizeof(__u32)) {
CERROR("buflen %u\n", *buflen);
return -EINVAL;
}
obj->len = *(*buf)++;
if (!local)
obj->len = le32_to_cpu(obj->len);
*buflen -= sizeof(__u32);
if (!obj->len) {
obj->data = NULL;
return 0;
}
len = local ? obj->len : cfs_size_round4(obj->len);
if (*buflen < len) {
CERROR("buflen %u < %u\n", *buflen, len);
obj->len = 0;
return -EINVAL;
}
if (!alloc)
obj->data = (__u8 *) *buf;
else {
OBD_ALLOC_LARGE(obj->data, obj->len);
if (!obj->data) {
CERROR("fail to alloc %u bytes\n", obj->len);
obj->len = 0;
return -ENOMEM;
}
memcpy(obj->data, *buf, obj->len);
}
*((char **)buf) += len;
*buflen -= len;
return 0;
}
int rawobj_extract(rawobj_t *obj, __u32 **buf, __u32 *buflen)
{
return __rawobj_extract(obj, buf, buflen, 0, 0);
}
int rawobj_extract_alloc(rawobj_t *obj, __u32 **buf, __u32 *buflen)
{
return __rawobj_extract(obj, buf, buflen, 1, 0);
}
int rawobj_extract_local(rawobj_t *obj, __u32 **buf, __u32 *buflen)
{
return __rawobj_extract(obj, buf, buflen, 0, 1);
}
int rawobj_extract_local_alloc(rawobj_t *obj, __u32 **buf, __u32 *buflen)
{
return __rawobj_extract(obj, buf, buflen, 1, 1);
}
int rawobj_from_netobj(rawobj_t *rawobj, netobj_t *netobj)
{
rawobj->len = netobj->len;
rawobj->data = netobj->data;
return 0;
}
int rawobj_from_netobj_alloc(rawobj_t *rawobj, netobj_t *netobj)
{
rawobj->len = 0;
rawobj->data = NULL;
if (netobj->len == 0)
return 0;
OBD_ALLOC_LARGE(rawobj->data, netobj->len);
if (rawobj->data == NULL)
return -ENOMEM;
rawobj->len = netobj->len;
memcpy(rawobj->data, netobj->data, netobj->len);
return 0;
}
/****************************************
* misc more *
****************************************/
int buffer_extract_bytes(const void **buf, __u32 *buflen,
void *res, __u32 reslen)
{
if (*buflen < reslen) {
CERROR("buflen %u < %u\n", *buflen, reslen);
return -EINVAL;
}
memcpy(res, *buf, reslen);
*buf += reslen;
*buflen -= reslen;
return 0;
}
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