84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
346 lines
12 KiB
C
346 lines
12 KiB
C
/* $NetBSD: namei.h,v 1.87 2012/11/18 18:25:50 dholland Exp $ */
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/*
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* WARNING: GENERATED FILE. DO NOT EDIT
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* (edit namei.src and run make namei in src/sys/sys)
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* by: NetBSD: gennameih.awk,v 1.5 2009/12/23 14:17:19 pooka Exp
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* from: NetBSD: namei.src,v 1.31 2012/11/18 18:25:08 dholland Exp
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*/
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/*
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* Copyright (c) 1985, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)namei.h 8.5 (Berkeley) 8/20/94
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*/
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#ifndef _SYS_NAMEI_H_
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#define _SYS_NAMEI_H_
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#include <sys/queue.h>
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#include <sys/mutex.h>
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#ifdef _KERNEL
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#include <sys/kauth.h>
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/*
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* Abstraction for a single pathname.
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*
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* This contains both the pathname string and (eventually) all
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* metadata that determines how the path is to be interpreted.
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* It is an opaque structure; the implementation is in vfs_lookup.c.
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*
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* To call namei, first set up a pathbuf with pathbuf_create or
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* pathbuf_copyin, then do NDINIT(), then call namei, then AFTER THE
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* STRUCT NAMEIDATA IS DEAD, call pathbuf_destroy. Don't destroy the
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* pathbuf before you've finished using the nameidata, or mysterious
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* bad things may happen.
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*
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* pathbuf_assimilate is like pathbuf_create but assumes ownership of
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* the string buffer passed in, which MUST BE of size PATH_MAX and
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* have been allocated with PNBUF_GET(). This should only be used when
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* absolutely necessary; e.g. nfsd uses it for loading paths from
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* mbufs.
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*/
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struct pathbuf;
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struct pathbuf *pathbuf_create(const char *path);
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struct pathbuf *pathbuf_assimilate(char *path);
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int pathbuf_copyin(const char *userpath, struct pathbuf **ret);
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void pathbuf_destroy(struct pathbuf *);
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/* get a copy of the (current) path string */
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void pathbuf_copystring(const struct pathbuf *, char *buf, size_t maxlen);
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/* hold a reference copy of the original path string */
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const char *pathbuf_stringcopy_get(struct pathbuf *);
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void pathbuf_stringcopy_put(struct pathbuf *, const char *);
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// XXX remove this
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int pathbuf_maybe_copyin(const char *userpath, enum uio_seg seg, struct pathbuf **ret);
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/*
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* Encapsulation of namei parameters.
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*/
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struct nameidata {
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/*
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* Arguments to namei/lookup.
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*/
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struct vnode *ni_atdir; /* startup dir, cwd if null */
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struct pathbuf *ni_pathbuf; /* pathname container */
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char *ni_pnbuf; /* extra pathname buffer ref (XXX) */
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/*
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* Arguments to lookup.
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*/
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struct vnode *ni_rootdir; /* logical root directory */
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struct vnode *ni_erootdir; /* emulation root directory */
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/*
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* Results: returned from/manipulated by lookup
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*/
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struct vnode *ni_vp; /* vnode of result */
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struct vnode *ni_dvp; /* vnode of intermediate directory */
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/*
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* Shared between namei and lookup/commit routines.
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*/
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size_t ni_pathlen; /* remaining chars in path */
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const char *ni_next; /* next location in pathname */
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unsigned int ni_loopcnt; /* count of symlinks encountered */
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/*
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* Lookup parameters: this structure describes the subset of
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* information from the nameidata structure that is passed
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* through the VOP interface.
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*/
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struct componentname {
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/*
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* Arguments to lookup.
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*/
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uint32_t cn_nameiop; /* namei operation */
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uint32_t cn_flags; /* flags to namei */
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kauth_cred_t cn_cred; /* credentials */
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/*
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* Shared between lookup and commit routines.
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*/
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const char *cn_nameptr; /* pointer to looked up name */
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size_t cn_namelen; /* length of looked up comp */
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size_t cn_consume; /* chars to consume in lookup */
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} ni_cnd;
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};
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/*
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* namei operations
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*/
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#define LOOKUP 0 /* perform name lookup only */
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#define CREATE 1 /* setup for file creation */
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#define DELETE 2 /* setup for file deletion */
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#define RENAME 3 /* setup for file renaming */
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#define OPMASK 3 /* mask for operation */
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/*
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* namei operational modifier flags, stored in ni_cnd.cn_flags
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*/
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#define LOCKLEAF 0x00000004 /* lock inode on return */
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#define LOCKPARENT 0x00000008 /* want parent vnode returned locked */
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#define TRYEMULROOT 0x00000010 /* try relative to emulation root
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first */
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#define NOCACHE 0x00000020 /* name must not be left in cache */
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#define FOLLOW 0x00000040 /* follow symbolic links */
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#define NOFOLLOW 0x00000000 /* do not follow symbolic links
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(pseudo) */
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#define EMULROOTSET 0x00000080 /* emulation root already
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in ni_erootdir */
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#define NOCHROOT 0x01000000 /* no chroot on abs path lookups */
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#define MODMASK 0x010000fc /* mask of operational modifiers */
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/*
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* Namei parameter descriptors.
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*/
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#define NOCROSSMOUNT 0x0000100 /* do not cross mount points */
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#define RDONLY 0x0000200 /* lookup with read-only semantics */
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#define ISDOTDOT 0x0002000 /* current component name is .. */
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#define MAKEENTRY 0x0004000 /* entry is to be added to name cache */
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#define ISLASTCN 0x0008000 /* this is last component of pathname */
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#define ISWHITEOUT 0x0020000 /* found whiteout */
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#define DOWHITEOUT 0x0040000 /* do whiteouts */
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#define REQUIREDIR 0x0080000 /* must be a directory */
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#define CREATEDIR 0x0200000 /* trailing slashes are ok */
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#define INRENAME 0x0400000 /* operation is a part of ``rename'' */
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#define INRELOOKUP 0x0800000 /* set while inside relookup() */
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#define PARAMASK 0x0eee300 /* mask of parameter descriptors */
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/*
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* Initialization of a nameidata structure.
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*/
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#define NDINIT(ndp, op, flags, pathbuf) { \
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(ndp)->ni_cnd.cn_nameiop = op; \
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(ndp)->ni_cnd.cn_flags = flags; \
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(ndp)->ni_atdir = NULL; \
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(ndp)->ni_pathbuf = pathbuf; \
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(ndp)->ni_cnd.cn_cred = kauth_cred_get(); \
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}
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/*
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* Use this to set the start directory for openat()-type operations.
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*/
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#define NDAT(ndp, dir) { \
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(ndp)->ni_atdir = (dir); \
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}
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#endif
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/*
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* This structure describes the elements in the cache of recent
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* names looked up by namei. NCHNAMLEN is sized to make structure
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* size a power of two to optimize allocations. Minimum reasonable
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* size is 15.
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*/
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#define NCHNAMLEN 31 /* maximum name segment length we bother with */
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/*
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* Namecache entry. This structure is arranged so that frequently
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* accessed and mostly read-only data is toward the front, with
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* infrequently accessed data and the lock towards the rear. The
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* lock is then more likely to be in a seperate cache line.
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*/
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struct namecache {
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LIST_ENTRY(namecache) nc_hash; /* hash chain */
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LIST_ENTRY(namecache) nc_vhash; /* directory hash chain */
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struct vnode *nc_dvp; /* vnode of parent of name */
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struct vnode *nc_vp; /* vnode the name refers to */
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int nc_flags; /* copy of componentname's ISWHITEOUT */
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char nc_nlen; /* length of name */
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char nc_name[NCHNAMLEN]; /* segment name */
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void *nc_gcqueue; /* queue for garbage collection */
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TAILQ_ENTRY(namecache) nc_lru; /* psuedo-lru chain */
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LIST_ENTRY(namecache) nc_dvlist;
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LIST_ENTRY(namecache) nc_vlist;
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kmutex_t nc_lock; /* lock on this entry */
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int nc_hittime; /* last time scored a hit */
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};
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#ifdef _KERNEL
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#include <sys/pool.h>
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struct mount;
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struct cpu_info;
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extern pool_cache_t pnbuf_cache; /* pathname buffer cache */
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#define PNBUF_GET() pool_cache_get(pnbuf_cache, PR_WAITOK)
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#define PNBUF_PUT(pnb) pool_cache_put(pnbuf_cache, (pnb))
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/*
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* Typesafe flags for namei_simple/nameiat_simple.
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*
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* This encoding is not optimal but serves the important purpose of
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* not being type-compatible with the regular namei flags.
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*/
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struct namei_simple_flags_type; /* Opaque. */
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typedef const struct namei_simple_flags_type *namei_simple_flags_t; /* Gross. */
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extern const namei_simple_flags_t
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NSM_NOFOLLOW_NOEMULROOT,
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NSM_NOFOLLOW_TRYEMULROOT,
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NSM_FOLLOW_NOEMULROOT,
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NSM_FOLLOW_TRYEMULROOT;
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/*
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* namei(at)?_simple_* - the simple cases of namei, with no struct
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* nameidata involved.
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*
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* namei_simple_kernel takes a kernel-space path as the first argument.
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* namei_simple_user takes a user-space path as the first argument.
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* The nameiat_simple_* variants handle relative path using the given
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* directory vnode instead of current directory.
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*
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* A namei call can be converted to namei_simple_* if:
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* - the second arg to NDINIT is LOOKUP;
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* - it does not need the parent vnode, nd.ni_dvp;
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* - the only flags it uses are (NO)FOLLOW and TRYEMULROOT;
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* - it does not do anything else gross with the contents of nd.
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*/
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int namei_simple_kernel(const char *, namei_simple_flags_t, struct vnode **);
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int namei_simple_user(const char *, namei_simple_flags_t, struct vnode **);
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int nameiat_simple_kernel(struct vnode *, const char *, namei_simple_flags_t,
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struct vnode **);
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int nameiat_simple_user(struct vnode *, const char *, namei_simple_flags_t,
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struct vnode **);
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int namei(struct nameidata *);
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uint32_t namei_hash(const char *, const char **);
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int lookup_for_nfsd(struct nameidata *, struct vnode *, int neverfollow);
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int lookup_for_nfsd_index(struct nameidata *, struct vnode *);
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int relookup(struct vnode *, struct vnode **, struct componentname *, int);
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void cache_purge1(struct vnode *, const char *, size_t, int);
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#define PURGE_PARENTS 1
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#define PURGE_CHILDREN 2
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#define cache_purge(vp) cache_purge1((vp),NULL,0,PURGE_PARENTS|PURGE_CHILDREN)
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int cache_lookup(struct vnode *, const char *, size_t, uint32_t, uint32_t,
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int *, struct vnode **);
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int cache_lookup_raw(struct vnode *, const char *, size_t, uint32_t,
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int *, struct vnode **);
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int cache_revlookup(struct vnode *, struct vnode **, char **, char *);
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void cache_enter(struct vnode *, struct vnode *,
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const char *, size_t, uint32_t);
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void nchinit(void);
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void nchreinit(void);
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void cache_cpu_init(struct cpu_info *);
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void cache_purgevfs(struct mount *);
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void namecache_print(struct vnode *, void (*)(const char *, ...)
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__printflike(1, 2));
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#endif
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/*
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* Stats on usefulness of namei caches.
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* XXX: should be 64-bit counters.
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*/
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struct nchstats {
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long ncs_goodhits; /* hits that we can really use */
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long ncs_neghits; /* negative hits that we can use */
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long ncs_badhits; /* hits we must drop */
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long ncs_falsehits; /* hits with id mismatch */
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long ncs_miss; /* misses */
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long ncs_long; /* long names that ignore cache */
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long ncs_pass2; /* names found with passes == 2 */
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long ncs_2passes; /* number of times we attempt it */
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long ncs_revhits; /* reverse-cache hits */
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long ncs_revmiss; /* reverse-cache misses */
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};
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#ifdef _KERNEL
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extern struct nchstats nchstats;
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#endif
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/* #endif !_SYS_NAMEI_H_ (generated by gennameih.awk) */
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/* Definitions match above, but with NAMEI_ prefix */
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#define NAMEI_LOOKUP 0
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#define NAMEI_CREATE 1
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#define NAMEI_DELETE 2
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#define NAMEI_RENAME 3
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#define NAMEI_OPMASK 3
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#define NAMEI_LOCKLEAF 0x00000004
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#define NAMEI_LOCKPARENT 0x00000008
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#define NAMEI_TRYEMULROOT 0x00000010
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#define NAMEI_NOCACHE 0x00000020
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#define NAMEI_FOLLOW 0x00000040
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#define NAMEI_NOFOLLOW 0x00000000
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#define NAMEI_EMULROOTSET 0x00000080
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#define NAMEI_NOCHROOT 0x01000000
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#define NAMEI_MODMASK 0x010000fc
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#define NAMEI_NOCROSSMOUNT 0x0000100
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#define NAMEI_RDONLY 0x0000200
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#define NAMEI_ISDOTDOT 0x0002000
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#define NAMEI_MAKEENTRY 0x0004000
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#define NAMEI_ISLASTCN 0x0008000
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#define NAMEI_ISWHITEOUT 0x0020000
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#define NAMEI_DOWHITEOUT 0x0040000
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#define NAMEI_REQUIREDIR 0x0080000
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#define NAMEI_CREATEDIR 0x0200000
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#define NAMEI_INRENAME 0x0400000
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#define NAMEI_INRELOOKUP 0x0800000
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#define NAMEI_PARAMASK 0x0eee300
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#endif /* !_SYS_NAMEI_H_ */
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