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📄 _atomic64e.h(2.91 KB)
📄 _atomic_subword.h(7.27 KB)
📄 _bitset.h(2.3 KB)
📄 _blockcount.h(1.97 KB)
📄 _bus_dma.h(2.15 KB)
📄 _callout.h(2.68 KB)
📄 _cpuset.h(1.76 KB)
📄 _cscan_atomic.h(18.1 KB)
📄 _cscan_bus.h(10.22 KB)
📄 _domainset.h(2.04 KB)
📄 _eventhandler.h(2.81 KB)
📄 _ffcounter.h(1.84 KB)
📄 _iovec.h(1.93 KB)
📄 _lock.h(2.98 KB)
📄 _lockmgr.h(1.82 KB)
📄 _mutex.h(2.63 KB)
📄 _null.h(1.7 KB)
📄 _pctrie.h(1.65 KB)
📄 _pthreadtypes.h(3.51 KB)
📄 _rangeset.h(1.86 KB)
📄 _rmlock.h(2.59 KB)
📄 _rwlock.h(2.39 KB)
📄 _semaphore.h(2.05 KB)
📄 _seqc.h(160 B)
📄 _sigset.h(2.46 KB)
📄 _smr.h(1.94 KB)
📄 _sockaddr_storage.h(2.37 KB)
📄 _stack.h(1.53 KB)
📄 _stdarg.h(2.15 KB)
📄 _stdint.h(2.6 KB)
📄 _sx.h(1.73 KB)
📄 _task.h(2.62 KB)
📄 _termios.h(7.64 KB)
📄 _timespec.h(2 KB)
📄 _timeval.h(1.88 KB)
📄 _types.h(5.66 KB)
📄 _ucontext.h(2.08 KB)
📄 _uio.h(1.99 KB)
📄 _umtx.h(2.5 KB)
📄 _unrhdr.h(1.92 KB)
📄 _winsize.h(2.14 KB)
📄 aac_ioctl.h(7.56 KB)
📄 abi_compat.h(2.42 KB)
📄 acct.h(4.95 KB)
📄 acl.h(14.62 KB)
📄 agpio.h(5.78 KB)
📄 aio.h(7.69 KB)
📄 alq.h(4.5 KB)
📄 apm.h(88 B)
📄 arb.h(28.88 KB)
📄 assym.h(2.7 KB)
📄 ata.h(45.35 KB)
📄 atomic_common.h(3.26 KB)
📄 auxv.h(1.58 KB)
📄 backlight.h(2.02 KB)
📄 bio.h(6.77 KB)
📄 bitset.h(8.53 KB)
📄 bitstring.h(12.16 KB)
📄 blist.h(3.74 KB)
📄 blockcount.h(3.03 KB)
📄 boot.h(1.8 KB)
📄 buf.h(20.73 KB)
📄 buf_ring.h(10.6 KB)
📄 bufobj.h(5.03 KB)
📄 bus.h(38.2 KB)
📄 bus_dma.h(13.68 KB)
📄 bus_dma_internal.h(2.42 KB)
📄 busdma_bufalloc.h(4.7 KB)
📄 callout.h(6.62 KB)
📄 caprights.h(4.17 KB)
📄 capsicum.h(17.54 KB)
📄 cdefs.h(27.79 KB)
📄 cdio.h(7.09 KB)
📄 cdrio.h(4.88 KB)
📄 cfictl.h(2.21 KB)
📄 chio.h(9.53 KB)
📄 ck.h(251 B)
📄 clock.h(8.07 KB)
📄 cnv.h(4.25 KB)
📄 compressor.h(2.05 KB)
📄 condvar.h(3.42 KB)
📄 conf.h(12.4 KB)
📄 cons.h(5.22 KB)
📄 consio.h(14.01 KB)
📄 copyright.h(1.97 KB)
📄 counter.h(3.02 KB)
📄 coverage.h(2.36 KB)
📄 cpu.h(7.02 KB)
📄 cpuctl.h(2.29 KB)
📄 cpuset.h(5.93 KB)
📄 csan.h(1.71 KB)
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📄 ctf_api.h(9.43 KB)
📄 ctype.h(2.81 KB)
📄 devctl.h(1.76 KB)
📄 devicestat.h(6.97 KB)
📄 devmap.h(4.04 KB)
📄 dirent.h(4.78 KB)
📁 disk
📄 disk.h(6.31 KB)
📄 disk_zone.h(6.52 KB)
📄 disklabel.h(4.39 KB)
📄 diskmbr.h(1.84 KB)
📄 dkstat.h(2.05 KB)
📄 dnv.h(3.39 KB)
📄 domain.h(3.64 KB)
📄 domainset.h(5.05 KB)
📄 dtrace.h(104.98 KB)
📄 dtrace_bsd.h(6.93 KB)
📄 dvdio.h(3.43 KB)
📄 efi.h(6.21 KB)
📄 efiio.h(2.06 KB)
📄 elf.h(1.6 KB)
📄 elf32.h(7.46 KB)
📄 elf64.h(7.79 KB)
📄 elf_common.h(59.51 KB)
📄 elf_generic.h(2.83 KB)
📄 endian.h(4.98 KB)
📄 epoch.h(4.01 KB)
📄 errno.h(8.29 KB)
📄 eui64.h(2.05 KB)
📄 event.h(12.61 KB)
📄 eventfd.h(1.86 KB)
📄 eventhandler.h(11.8 KB)
📄 eventvar.h(2.46 KB)
📄 exec.h(4.56 KB)
📄 extattr.h(4.08 KB)
📄 fail.h(13.1 KB)
📄 fbio.h(19.95 KB)
📄 fcntl.h(12.02 KB)
📄 fdcio.h(7.6 KB)
📄 file.h(14.06 KB)
📄 filedesc.h(12.13 KB)
📄 filio.h(3.67 KB)
📄 firmware.h(3.11 KB)
📄 fnv_hash.h(1.41 KB)
📄 font.h(3.85 KB)
📄 gmon.h(7.16 KB)
📄 gpio.h(9.85 KB)
📄 gpt.h(1.51 KB)
📄 gsb_crc32.h(998 B)
📄 gtaskqueue.h(4.21 KB)
📄 hash.h(3.55 KB)
📄 hhook.h(5.86 KB)
📄 iconv.h(8.22 KB)
📄 imgact.h(5.22 KB)
📄 imgact_aout.h(5.65 KB)
📄 imgact_binmisc.h(6.95 KB)
📄 imgact_elf.h(4.13 KB)
📄 interrupt.h(8.07 KB)
📄 intr.h(5.36 KB)
📄 ioccom.h(3.82 KB)
📄 ioctl.h(2.24 KB)
📄 ioctl_compat.h(6.42 KB)
📄 iov.h(11.67 KB)
📄 iov_schema.h(2.33 KB)
📄 ipc.h(4.93 KB)
📄 ipmi.h(5.4 KB)
📄 jail.h(14.98 KB)
📄 joystick.h(2.12 KB)
📄 kbio.h(7.81 KB)
📄 kcov.h(2.36 KB)
📄 kdb.h(5.04 KB)
📄 kenv.h(2.02 KB)
📄 kern_prefetch.h(1.67 KB)
📄 kernel.h(16.18 KB)
📄 kerneldump.h(4.85 KB)
📄 khelp.h(3.08 KB)
📄 kobj.h(6.92 KB)
📄 kpilite.h(2.01 KB)
📄 ksem.h(2.34 KB)
📄 kthread.h(3.04 KB)
📄 ktls.h(6.52 KB)
📄 ktr.h(10.92 KB)
📄 ktr_class.h(3.8 KB)
📄 ktrace.h(8.13 KB)
📄 libkern.h(7.74 KB)
📄 limits.h(3.69 KB)
📄 link_aout.h(10.2 KB)
📄 link_elf.h(4.06 KB)
📄 linker.h(11.88 KB)
📄 linker_set.h(3.85 KB)
📄 lock.h(12.24 KB)
📄 lock_profile.h(2.6 KB)
📄 lockf.h(5.55 KB)
📄 lockmgr.h(7 KB)
📄 lockstat.h(5.13 KB)
📄 loginclass.h(2.08 KB)
📄 mac.h(3.96 KB)
📄 malloc.h(11.76 KB)
📄 mbuf.h(50.74 KB)
📄 mchain.h(4.21 KB)
📄 md4.h(1.63 KB)
📄 md5.h(1.81 KB)
📄 mdioctl.h(3.73 KB)
📄 memdesc.h(3.79 KB)
📄 memrange.h(2.36 KB)
📄 mman.h(10.41 KB)
📄 module.h(8.77 KB)
📄 module_khelp.h(3.45 KB)
📄 mount.h(42.05 KB)
📄 mouse.h(12.69 KB)
📄 mpt_ioctl.h(4.27 KB)
📄 mqueue.h(1.86 KB)
📄 msg.h(4.78 KB)
📄 msgbuf.h(3.49 KB)
📄 mtio.h(11.94 KB)
📄 mutex.h(19.18 KB)
📄 namei.h(11.27 KB)
📄 nlist_aout.h(4.23 KB)
📄 nv.h(10.62 KB)
📄 nvpair.h(14.77 KB)
📄 osd.h(4.02 KB)
📄 param.h(12.23 KB)
📄 pciio.h(5.67 KB)
📄 pcpu.h(9.79 KB)
📄 pctrie.h(5.19 KB)
📄 physmem.h(2.92 KB)
📄 pidctrl.h(5.44 KB)
📄 pipe.h(4.63 KB)
📄 pmc.h(37.29 KB)
📄 pmckern.h(8.01 KB)
📄 pmclog.h(9.23 KB)
📄 poll.h(4.03 KB)
📄 posix4.h(3.71 KB)
📄 power.h(2.34 KB)
📄 priority.h(4.39 KB)
📄 priv.h(19.73 KB)
📄 prng.h(354 B)
📄 proc.h(50.73 KB)
📄 procctl.h(4.89 KB)
📄 procdesc.h(4.46 KB)
📄 procfs.h(4.2 KB)
📄 protosw.h(14.56 KB)
📄 ptio.h(1.57 KB)
📄 ptrace.h(8.61 KB)
📄 qmath.h(22.07 KB)
📄 queue.h(28.61 KB)
📄 racct.h(7.48 KB)
📄 random.h(5.41 KB)
📄 rangelock.h(3.86 KB)
📄 rangeset.h(2.96 KB)
📄 rctl.h(5.91 KB)
📄 reboot.h(3.41 KB)
📄 refcount.h(5.72 KB)
📄 regression.h(1.62 KB)
📄 resource.h(5.32 KB)
📄 resourcevar.h(6.33 KB)
📄 rman.h(6.41 KB)
📄 rmlock.h(5.56 KB)
📄 rtprio.h(3.08 KB)
📄 runq.h(2.54 KB)
📄 rwlock.h(10.61 KB)
📄 sbuf.h(4.68 KB)
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📄 sdt.h(17.89 KB)
📄 select.h(3.5 KB)
📄 selinfo.h(2.39 KB)
📄 sem.h(4.31 KB)
📄 sema.h(2.61 KB)
📄 seqc.h(3.26 KB)
📄 serial.h(3.49 KB)
📄 sf_buf.h(5.87 KB)
📄 sglist.h(3.89 KB)
📄 shm.h(5.69 KB)
📄 sigio.h(2.83 KB)
📄 signal.h(15.83 KB)
📄 signalvar.h(12.95 KB)
📄 sleepqueue.h(5.61 KB)
📄 slicer.h(2.19 KB)
📄 smp.h(8.88 KB)
📄 smr.h(7.64 KB)
📄 smr_types.h(4.87 KB)
📄 snoop.h(1014 B)
📄 sockbuf.h(9.9 KB)
📄 socket.h(23.43 KB)
📄 socketvar.h(18.75 KB)
📄 sockio.h(7.97 KB)
📄 sockopt.h(2.98 KB)
📄 soundcard.h(69.38 KB)
📄 specialfd.h(1.56 KB)
📄 spigenio.h(2.28 KB)
📄 stack.h(2.65 KB)
📄 stat.h(13.44 KB)
📄 stats.h(34.73 KB)
📄 statvfs.h(3.08 KB)
📄 stdatomic.h(13.94 KB)
📄 stddef.h(1.7 KB)
📄 stdint.h(2.63 KB)
📄 sx.h(11.04 KB)
📄 syscall.h(13.99 KB)
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📄 sysent.h(10.82 KB)
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📄 systm.h(21.97 KB)
📄 taskqueue.h(7.65 KB)
📄 terminal.h(8.25 KB)
📄 termios.h(151 B)
📄 thr.h(2.87 KB)
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📄 tim_filter.h(4.61 KB)
📄 time.h(16.87 KB)
📄 timeb.h(2.59 KB)
📄 timeet.h(3.65 KB)
📄 timeffc.h(11.94 KB)
📄 timepps.h(6.48 KB)
📄 timers.h(3.56 KB)
📄 times.h(2.46 KB)
📄 timespec.h(2.4 KB)
📄 timetc.h(3.16 KB)
📄 timex.h(6.61 KB)
📄 tree.h(27.93 KB)
📄 tslog.h(2.3 KB)
📄 tty.h(8.98 KB)
📄 ttycom.h(6.48 KB)
📄 ttydefaults.h(3.92 KB)
📄 ttydevsw.h(5.28 KB)
📄 ttydisc.h(2.93 KB)
📄 ttyhook.h(3.98 KB)
📄 ttyqueue.h(5.26 KB)
📄 turnstile.h(4.83 KB)
📄 types.h(11.64 KB)
📄 ucontext.h(2.91 KB)
📄 ucred.h(5.4 KB)
📄 uio.h(4.15 KB)
📄 umtx.h(5.94 KB)
📄 un.h(2.96 KB)
📄 unistd.h(7.34 KB)
📄 unpcb.h(6.77 KB)
📄 user.h(21.58 KB)
📄 utsname.h(2.47 KB)
📄 uuid.h(3.17 KB)
📄 vdso.h(4.26 KB)
📄 vmem.h(4.91 KB)
📄 vmmeter.h(7.72 KB)
📄 vnode.h(40.87 KB)
📄 vtoc.h(89 B)
📄 wait.h(6.11 KB)
📄 watchdog.h(4.22 KB)

Editing: namei.h

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1985, 1989, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)namei.h	8.5 (Berkeley) 1/9/95
 * $FreeBSD$
 */

#ifndef _SYS_NAMEI_H_
#define	_SYS_NAMEI_H_

#include <sys/caprights.h>
#include <sys/filedesc.h>
#include <sys/queue.h>
#include <sys/_uio.h>

enum nameiop { LOOKUP, CREATE, DELETE, RENAME };

struct componentname {
	/*
	 * Arguments to lookup.
	 */
	u_int64_t cn_origflags;	/* flags to namei */
	u_int64_t cn_flags;	/* flags to namei */
	struct	thread *cn_thread;/* thread requesting lookup */
	struct	ucred *cn_cred;	/* credentials */
	enum nameiop cn_nameiop;	/* namei operation */
	int	cn_lkflags;	/* Lock flags LK_EXCLUSIVE or LK_SHARED */
	/*
	 * Shared between lookup and commit routines.
	 */
	char	*cn_pnbuf;	/* pathname buffer */
	char	*cn_nameptr;	/* pointer to looked up name */
	long	cn_namelen;	/* length of looked up component */
};

struct nameicap_tracker;
TAILQ_HEAD(nameicap_tracker_head, nameicap_tracker);

/*
 * Encapsulation of namei parameters.
 */
struct nameidata {
	/*
	 * Arguments to namei/lookup.
	 */
	const	char *ni_dirp;		/* pathname pointer */
	enum	uio_seg ni_segflg;	/* location of pathname */
	cap_rights_t *ni_rightsneeded;	/* rights required to look up vnode */
	/*
	 * Arguments to lookup.
	 */
	struct  vnode *ni_startdir;	/* starting directory */
	struct	vnode *ni_rootdir;	/* logical root directory */
	struct	vnode *ni_topdir;	/* logical top directory */
	int	ni_dirfd;		/* starting directory for *at functions */
	int	ni_lcf;			/* local call flags */
	/*
	 * Results: returned from namei
	 */
	struct filecaps ni_filecaps;	/* rights the *at base has */
	/*
	 * Results: returned from/manipulated by lookup
	 */
	struct	vnode *ni_vp;		/* vnode of result */
	struct	vnode *ni_dvp;		/* vnode of intermediate directory */
	/*
	 * Results: flags returned from namei
	 */
	u_int	ni_resflags;
	/*
	 * Debug for validating API use by the callers.
	 */
	u_short	ni_debugflags;
	/*
	 * Shared between namei and lookup/commit routines.
	 */
	u_short	ni_loopcnt;		/* count of symlinks encountered */
	size_t	ni_pathlen;		/* remaining chars in path */
	char	*ni_next;		/* next location in pathname */
	/*
	 * Lookup parameters: this structure describes the subset of
	 * information from the nameidata structure that is passed
	 * through the VOP interface.
	 */
	struct componentname ni_cnd;
	struct nameicap_tracker_head ni_cap_tracker;
};

#ifdef _KERNEL

enum cache_fpl_status { CACHE_FPL_STATUS_DESTROYED, CACHE_FPL_STATUS_ABORTED,
    CACHE_FPL_STATUS_PARTIAL, CACHE_FPL_STATUS_HANDLED, CACHE_FPL_STATUS_UNSET };
int	cache_fplookup(struct nameidata *ndp, enum cache_fpl_status *status,
    struct pwd **pwdp);

/*
 * Flags for namei.
 *
 * If modifying the list make sure to check whether NDVALIDATE needs updating.
 */

/*
 * Debug.
 */
#define	NAMEI_DBG_INITED	0x0001
#define	NAMEI_DBG_CALLED	0x0002
#define	NAMEI_DBG_HADSTARTDIR	0x0004

/*
 * namei operational modifier flags, stored in ni_cnd.flags
 */
#define	NC_NOMAKEENTRY	0x0001	/* name must not be added to cache */
#define	NC_KEEPPOSENTRY	0x0002	/* don't evict a positive entry */
#define	NOCACHE		NC_NOMAKEENTRY	/* for compatibility with older code */
#define	LOCKLEAF	0x0004	/* lock vnode on return */
#define	LOCKPARENT	0x0008	/* want parent vnode returned locked */
#define	WANTPARENT	0x0010	/* want parent vnode returned unlocked */
#define	FAILIFEXISTS	0x0020	/* return EEXIST if found */
#define	FOLLOW		0x0040	/* follow symbolic links */
#define	LOCKSHARED	0x0100	/* Shared lock leaf */
#define	NOFOLLOW	0x0000	/* do not follow symbolic links (pseudo) */
#define	RBENEATH	0x100000000ULL /* No escape, even tmp, from start dir */
#define	MODMASK		0xf000001ffULL	/* mask of operational modifiers */
/*
 * Namei parameter descriptors.
 *
 * SAVENAME may be set by either the callers of namei or by VOP_LOOKUP.
 * If the caller of namei sets the flag (for example execve wants to
 * know the name of the program that is being executed), then it must
 * free the buffer. If VOP_LOOKUP sets the flag, then the buffer must
 * be freed by either the commit routine or the VOP_ABORT routine.
 * SAVESTART is set only by the callers of namei. It implies SAVENAME
 * plus the addition of saving the parent directory that contains the
 * name in ni_startdir. It allows repeated calls to lookup for the
 * name being sought. The caller is responsible for releasing the
 * buffer and for vrele'ing ni_startdir.
 */
#define	RDONLY		0x00000200 /* lookup with read-only semantics */
#define	SAVENAME	0x00000400 /* save pathname buffer */
#define	SAVESTART	0x00000800 /* save starting directory */
#define	ISWHITEOUT	0x00001000 /* found whiteout */
#define	DOWHITEOUT	0x00002000 /* do whiteouts */
#define	WILLBEDIR	0x00004000 /* new files will be dirs; allow trailing / */
#define	ISOPEN		0x00008000 /* caller is opening; return a real vnode. */
#define	NOCROSSMOUNT	0x00010000 /* do not cross mount points */
#define	NOMACCHECK	0x00020000 /* do not perform MAC checks */
#define	AUDITVNODE1	0x00040000 /* audit the looked up vnode information */
#define	AUDITVNODE2	0x00080000 /* audit the looked up vnode information */
#define	NOCAPCHECK	0x00100000 /* do not perform capability checks */
/* UNUSED		0x00200000 */
/* UNUSED		0x00400000 */
/* UNUSED		0x00800000 */
#define	HASBUF		0x01000000 /* has allocated pathname buffer */
#define	NOEXECCHECK	0x02000000 /* do not perform exec check on dir */
#define	MAKEENTRY	0x04000000 /* entry is to be added to name cache */
#define	ISSYMLINK	0x08000000 /* symlink needs interpretation */
#define	ISLASTCN	0x10000000 /* this is last component of pathname */
#define	ISDOTDOT	0x20000000 /* current component name is .. */
#define	TRAILINGSLASH	0x40000000 /* path ended in a slash */
#define	PARAMASK	0x7ffffe00 /* mask of parameter descriptors */

/*
 * Flags which must not be passed in by callers.
 */
#define NAMEI_INTERNAL_FLAGS	\
	(HASBUF | NOEXECCHECK | MAKEENTRY | ISSYMLINK | ISLASTCN | ISDOTDOT | \
	 TRAILINGSLASH)

/*
 * Namei results flags
 */
#define	NIRES_ABS	0x00000001 /* Path was absolute */
#define	NIRES_STRICTREL	0x00000002 /* Restricted lookup result */

/*
 * Flags in ni_lcf, valid for the duration of the namei call.
 */
#define	NI_LCF_STRICTRELATIVE	0x0001	/* relative lookup only */
#define	NI_LCF_CAP_DOTDOT	0x0002	/* ".." in strictrelative case */

/*
 * Initialization of a nameidata structure.
 */
#define	NDINIT(ndp, op, flags, segflg, namep, td)			\
	NDINIT_ALL(ndp, op, flags, segflg, namep, AT_FDCWD, NULL, &cap_no_rights, td)
#define	NDINIT_AT(ndp, op, flags, segflg, namep, dirfd, td)		\
	NDINIT_ALL(ndp, op, flags, segflg, namep, dirfd, NULL, &cap_no_rights, td)
#define	NDINIT_ATRIGHTS(ndp, op, flags, segflg, namep, dirfd, rightsp, td) \
	NDINIT_ALL(ndp, op, flags, segflg, namep, dirfd, NULL, rightsp, td)
#define	NDINIT_ATVP(ndp, op, flags, segflg, namep, vp, td)		\
	NDINIT_ALL(ndp, op, flags, segflg, namep, AT_FDCWD, vp, &cap_no_rights, td)

/*
 * Note the constant pattern may *hide* bugs.
 */
#ifdef INVARIANTS
#define NDINIT_PREFILL(arg)	memset(arg, 0xff, sizeof(*arg))
#define NDINIT_DBG(arg)		{ (arg)->ni_debugflags = NAMEI_DBG_INITED; }
#define NDREINIT_DBG(arg)	{						\
	if (((arg)->ni_debugflags & NAMEI_DBG_INITED) == 0)			\
		panic("namei data not inited");					\
	if (((arg)->ni_debugflags & NAMEI_DBG_HADSTARTDIR) != 0)		\
		panic("NDREINIT on namei data with NAMEI_DBG_HADSTARTDIR");	\
	(arg)->ni_debugflags = NAMEI_DBG_INITED;				\
}
#else
#define NDINIT_PREFILL(arg)	do { } while (0)
#define NDINIT_DBG(arg)		do { } while (0)
#define NDREINIT_DBG(arg)	do { } while (0)
#endif

#define NDINIT_ALL(ndp, op, flags, segflg, namep, dirfd, startdir, rightsp, td)	\
do {										\
	struct nameidata *_ndp = (ndp);						\
	cap_rights_t *_rightsp = (rightsp);					\
	MPASS(_rightsp != NULL);						\
	NDINIT_PREFILL(_ndp);							\
	NDINIT_DBG(_ndp);							\
	_ndp->ni_cnd.cn_nameiop = op;						\
	_ndp->ni_cnd.cn_flags = flags;						\
	_ndp->ni_segflg = segflg;						\
	_ndp->ni_dirp = namep;							\
	_ndp->ni_dirfd = dirfd;							\
	_ndp->ni_startdir = startdir;						\
	_ndp->ni_resflags = 0;							\
	filecaps_init(&_ndp->ni_filecaps);					\
	_ndp->ni_cnd.cn_thread = td;						\
	_ndp->ni_rightsneeded = _rightsp;					\
} while (0)

#define NDREINIT(ndp)	do {							\
	struct nameidata *_ndp = (ndp);						\
	NDREINIT_DBG(_ndp);							\
	_ndp->ni_resflags = 0;							\
	_ndp->ni_startdir = NULL;						\
} while (0)

#define NDF_NO_DVP_RELE		0x00000001
#define NDF_NO_DVP_UNLOCK	0x00000002
#define NDF_NO_DVP_PUT		0x00000003
#define NDF_NO_VP_RELE		0x00000004
#define NDF_NO_VP_UNLOCK	0x00000008
#define NDF_NO_VP_PUT		0x0000000c
#define NDF_NO_STARTDIR_RELE	0x00000010
#define NDF_NO_FREE_PNBUF	0x00000020
#define NDF_ONLY_PNBUF		(~NDF_NO_FREE_PNBUF)

void NDFREE_PNBUF(struct nameidata *);
void NDFREE(struct nameidata *, const u_int);
#define NDFREE(ndp, flags) do {						\
	struct nameidata *_ndp = (ndp);					\
	if (__builtin_constant_p(flags) && flags == NDF_ONLY_PNBUF)	\
		NDFREE_PNBUF(_ndp);					\
	else								\
		NDFREE(_ndp, flags);					\
} while (0)

#ifdef INVARIANTS
void NDFREE_NOTHING(struct nameidata *);
void NDVALIDATE(struct nameidata *);
#else
#define NDFREE_NOTHING(ndp)	do { } while (0)
#define NDVALIDATE(ndp)	do { } while (0)
#endif

int	namei(struct nameidata *ndp);
int	lookup(struct nameidata *ndp);
int	relookup(struct vnode *dvp, struct vnode **vpp,
	    struct componentname *cnp);
#endif

/*
 * Stats on usefulness of namei caches.
 */
struct nchstats {
	long	ncs_goodhits;		/* hits that we can really use */
	long	ncs_neghits;		/* negative hits that we can use */
	long	ncs_badhits;		/* hits we must drop */
	long	ncs_falsehits;		/* hits with id mismatch */
	long	ncs_miss;		/* misses */
	long	ncs_long;		/* long names that ignore cache */
	long	ncs_pass2;		/* names found with passes == 2 */
	long	ncs_2passes;		/* number of times we attempt it */
};

extern struct nchstats nchstats;

#endif /* !_SYS_NAMEI_H_ */

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