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 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