sharefs.c revision a237e38e9161f0acd6451439d4a7dd597e66291d
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma weak sharefs = _sharefs
#include "synonyms.h"
#include <sys/types.h>
#include <sys/types32.h>
#include <rpc/types.h>
#include <sys/vfs.h>
#include <strings.h>
#include <sharefs/share.h>
#include <sys/syscall.h>
#include "libc.h"
#define SMAX(i, j) \
if ((j) > (i)) { \
(i) = (j); \
}
int
sharefs(enum sharefs_sys_op opcode, struct share *sh)
{
uint32_t i, j;
/*
* We need to know the total size of the share
* and also the largest element size. This is to
* get enough buffer space to transfer from
* userland to kernel.
*/
i = (sh->sh_path ? strlen(sh->sh_path) : 0);
sh->sh_size = i;
j = (sh->sh_res ? strlen(sh->sh_res) : 0);
sh->sh_size += j;
SMAX(i, j);
j = (sh->sh_fstype ? strlen(sh->sh_fstype) : 0);
sh->sh_size += j;
SMAX(i, j);
j = (sh->sh_opts ? strlen(sh->sh_opts) : 0);
sh->sh_size += j;
SMAX(i, j);
j = (sh->sh_descr ? strlen(sh->sh_descr) : 0);
sh->sh_size += j;
SMAX(i, j);
return (syscall(SYS_sharefs, opcode, sh, i));
}