1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include "lint.h"
30#include <sys/types.h>
31#include <sys/types32.h>
32#include <rpc/types.h>
33#include <sys/vfs.h>
34#include <strings.h>
35#include <sharefs/share.h>
36#include <sys/syscall.h>
37
38#include "libc.h"
39
40#define	SMAX(i, j)		\
41	if ((j) > (i)) {	\
42		(i) = (j);	\
43	}
44
45int
46_sharefs(enum sharefs_sys_op opcode, struct share *sh)
47{
48	uint32_t		i, j;
49
50	/*
51	 * We need to know the total size of the share
52	 * and also the largest element size. This is to
53	 * get enough buffer space to transfer from
54	 * userland to kernel.
55	 */
56	i = (sh->sh_path ? strlen(sh->sh_path) : 0);
57	sh->sh_size = i;
58
59	j = (sh->sh_res ? strlen(sh->sh_res) : 0);
60	sh->sh_size += j;
61	SMAX(i, j);
62
63	j = (sh->sh_fstype ? strlen(sh->sh_fstype) : 0);
64	sh->sh_size += j;
65	SMAX(i, j);
66
67	j = (sh->sh_opts ? strlen(sh->sh_opts) : 0);
68	sh->sh_size += j;
69	SMAX(i, j);
70
71	j = (sh->sh_descr ? strlen(sh->sh_descr) : 0);
72	sh->sh_size += j;
73	SMAX(i, j);
74
75	return (syscall(SYS_sharefs, opcode, sh, i));
76}
77