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