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
45 int
_sharefs(enum sharefs_sys_op opcode,struct share * sh)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