1 /* 2 * Copyright (c) 1985, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)namei.h 8.5 (Berkeley) 1/9/95 34 * $FreeBSD: src/sys/sys/namei.h,v 1.29.2.2 2001/09/30 21:12:54 luigi Exp $ 35 * $DragonFly: src/sys/sys/namei.h,v 1.15 2004/11/12 00:09:27 dillon Exp $ 36 */ 37 38 #ifndef _SYS_NAMEI_H_ 39 #define _SYS_NAMEI_H_ 40 41 #include <sys/queue.h> 42 #include <sys/uio.h> 43 44 #ifdef _KERNEL 45 #ifndef _SYS_THREAD_H_ 46 #include <sys/thread.h> 47 #endif 48 #ifndef _SYS_PROC_H_ 49 #include <sys/proc.h> 50 #endif 51 #endif 52 53 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 54 #ifndef _SYS_NCHSTATS_H_ 55 #include <sys/nchstats.h> 56 #endif 57 #endif 58 59 struct componentname { 60 /* 61 * Arguments to lookup. 62 */ 63 u_long cn_nameiop; /* namei operation */ 64 u_long cn_flags; /* flags to namei */ 65 struct thread *cn_td; /* process requesting lookup */ 66 struct ucred *cn_cred; /* credentials */ 67 /* 68 * Shared between lookup and commit routines. 69 */ 70 char *cn_nameptr; /* pointer to looked up name */ 71 long cn_namelen; /* length of looked up component */ 72 long cn_consume; /* chars to consume in lookup() */ 73 int cn_timeout; /* if CNP_CACHETIMEOUT is set, in ticks */ 74 struct vnode *cn_notvp; /* used by NFS to check for collision */ 75 }; 76 77 #ifdef _KERNEL 78 /* 79 * namei operations 80 */ 81 #define NAMEI_LOOKUP 0 /* perform name lookup only */ 82 #define NAMEI_CREATE 1 /* setup for file creation */ 83 #define NAMEI_DELETE 2 /* setup for file deletion */ 84 #define NAMEI_RENAME 3 /* setup for file renaming */ 85 #define NAMEI_OPMASK 3 /* mask for operation */ 86 /* 87 * namei operational modifier flags, stored in ni_cnd.flags 88 */ 89 /* (LOCKLEAF) 0x00000004 */ 90 #define CNP_LOCKPARENT 0x00000008 /* return parent vnode locked */ 91 #define CNP_WANTPARENT 0x00000010 /* return parent vnode unlocked */ 92 /* (NOCACHE) 0x00000020 */ 93 #define CNP_FOLLOW 0x00000040 /* follow symbolic links */ 94 /* (NOOBJ) 0x00000080 */ 95 #define CNP_MODMASK 0x00c000fc /* mask of operational modifiers */ 96 /* 97 * Namei parameter descriptors. 98 */ 99 /* (NOCROSSMOUNT) 0x00000100 */ 100 #define CNP_RDONLY 0x00000200 /* lookup with read-only semantics */ 101 #define CNP_NOTVP 0x00000400 /* test cn_notvp, fail if matches */ 102 /* (SAVENAME) 0x00000800 */ 103 /* (CNP_SAVESTART) 0x00001000 */ 104 #define CNP_ISDOTDOT 0x00002000 /* current component name is .. */ 105 /* (MAKEENTRY) 0x00004000 */ 106 /* (ISLASTCN) 0x00008000 */ 107 /* (ISSYMLINK) 0x00010000 */ 108 #define CNP_ISWHITEOUT 0x00020000 /* found whiteout */ 109 #define CNP_DOWHITEOUT 0x00040000 /* do whiteouts */ 110 /* (WILLBEDIR) 0x00080000 */ 111 /* (ISUNICODE) 0x00100000 */ 112 #define CNP_PDIRUNLOCK 0x00200000 /* fs lookup() unlocked parent dir */ 113 /* (WANTDNCP) 0x00400000 */ 114 /* (WANTNCP) 0x00800000 */ 115 /* (CACHETIMEOUT) 0x01000000 */ 116 #define CNP_PARAMASK 0x011fff00 /* mask of parameter descriptors */ 117 118 extern int varsym_enable; 119 120 int relookup (struct vnode *dvp, struct vnode **vpp, 121 struct componentname *cnp); 122 #endif 123 124 #endif /* !_SYS_NAMEI_H_ */ 125