2 * Copyright (c) 1985, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 $
41 #include <sys/queue.h>
45 #ifndef _SYS_THREAD_H_
46 #include <sys/thread.h>
53 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
54 #ifndef _SYS_NCHSTATS_H_
55 #include <sys/nchstats.h>
59 struct componentname {
61 * Arguments to lookup.
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 */
68 * Shared between lookup and commit routines.
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 */
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 */
87 * namei operational modifier flags, stored in ni_cnd.flags
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 */
97 * Namei parameter descriptors.
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 */
118 extern int varsym_enable;
120 int relookup (struct vnode *dvp, struct vnode **vpp,
121 struct componentname *cnp);
124 #endif /* !_SYS_NAMEI_H_ */