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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #pragma weak _sharefs = __sharefs 29 30 #include "synonyms.h" 31 #include <sys/types.h> 32 #include <sys/types32.h> 33 #include <rpc/types.h> 34 #include <sys/vfs.h> 35 #include <strings.h> 36 #include <sharefs/share.h> 37 #include <sys/syscall.h> 38 39 #include "libc.h" 40 41 #define SMAX(i, j) \ 42 if ((j) > (i)) { \ 43 (i) = (j); \ 44 } 45 46 int 47 _sharefs(enum sharefs_sys_op opcode, struct share *sh) 48 { 49 uint32_t i, j; 50 51 /* 52 * We need to know the total size of the share 53 * and also the largest element size. This is to 54 * get enough buffer space to transfer from 55 * userland to kernel. 56 */ 57 i = (sh->sh_path ? strlen(sh->sh_path) : 0); 58 sh->sh_size = i; 59 60 j = (sh->sh_res ? strlen(sh->sh_res) : 0); 61 sh->sh_size += j; 62 SMAX(i, j); 63 64 j = (sh->sh_fstype ? strlen(sh->sh_fstype) : 0); 65 sh->sh_size += j; 66 SMAX(i, j); 67 68 j = (sh->sh_opts ? strlen(sh->sh_opts) : 0); 69 sh->sh_size += j; 70 SMAX(i, j); 71 72 j = (sh->sh_descr ? strlen(sh->sh_descr) : 0); 73 sh->sh_size += j; 74 SMAX(i, j); 75 76 return (syscall(SYS_sharefs, opcode, sh, i)); 77 } 78