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 #include "lint.h"
28 #include <sys/types.h>
29 #include <sys/types32.h>
30 #include <rpc/types.h>
31 #include <sys/vfs.h>
32 #include <strings.h>
33 #include <sharefs/share.h>
34 #include <sys/syscall.h>
35
36 #include "libc.h"
37
38 #define SMAX(i, j) \
39 if ((j) > (i)) { \
40 (i) = (j); \
41 }
42
43 int
_sharefs(enum sharefs_sys_op opcode,struct share * sh)44 _sharefs(enum sharefs_sys_op opcode, struct share *sh)
45 {
46 uint32_t i, j;
47
48 /*
49 * We need to know the total size of the share
50 * and also the largest element size. This is to
51 * get enough buffer space to transfer from
52 * userland to kernel.
53 */
54 i = (sh->sh_path ? strlen(sh->sh_path) : 0);
55 sh->sh_size = i;
56
57 j = (sh->sh_res ? strlen(sh->sh_res) : 0);
58 sh->sh_size += j;
59 SMAX(i, j);
60
61 j = (sh->sh_fstype ? strlen(sh->sh_fstype) : 0);
62 sh->sh_size += j;
63 SMAX(i, j);
64
65 j = (sh->sh_opts ? strlen(sh->sh_opts) : 0);
66 sh->sh_size += j;
67 SMAX(i, j);
68
69 j = (sh->sh_descr ? strlen(sh->sh_descr) : 0);
70 sh->sh_size += j;
71 SMAX(i, j);
72
73 return (syscall(SYS_sharefs, opcode, sh, i));
74 }
75