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 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