FreeBSD-5.3/sys/sys/vnode.h
/*
* Copyright (c) 1989, 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.
* 4. 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.
*
* @(#)vnode.h 8.7 (Berkeley) 2/4/94
* $FreeBSD: src/sys/sys/vnode.h,v 1.243 2004/08/15 06:24:42 jmg Exp $
*/
#ifndef _SYS_VNODE_H_
#define _SYS_VNODE_H_
/*
* XXX - compatability until lockmgr() goes away or all the #includes are
* updated.
*/
#include <sys/lockmgr.h>
#include <sys/queue.h>
#include <sys/_lock.h>
#include <sys/lock.h>
#include <sys/_mutex.h>
#include <sys/mutex.h>
#include <sys/selinfo.h>
#include <sys/uio.h>
#include <sys/acl.h>
#include <sys/ktr.h>
/*
* The vnode is the focus of all file activity in UNIX. There is a
* unique vnode allocated for each active file, each current directory,
* each mounted-on file, text file, and the root.
*/
/*
* Vnode types. VNON means no type.
*/
enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
/*
* Each underlying filesystem allocates its own private area and hangs
* it from v_data. If non-null, this area is freed in getnewvnode().
*/
TAILQ_HEAD(buflists, buf);
typedef int vop_t(void *);
struct namecache;
struct vpollinfo {
struct mtx vpi_lock; /* lock to protect below */
struct selinfo vpi_selinfo; /* identity of poller(s) */
short vpi_events; /* what they are looking for */
short vpi_revents; /* what has happened */
};
/*
* Reading or writing any of these items requires holding the appropriate lock.
*
* Lock reference:
* c - namecache mutex
* f - freelist mutex
* G - Giant
* i - interlock
* m - mntvnodes mutex
* p - pollinfo lock
* s - spechash mutex
* S - syncer mutex
* u - Only a reference to the vnode is needed to read.
* v - vnode lock
*
* Vnodes may be found on many lists. The general way to deal with operating
* on a vnode that is on a list is:
* 1) Lock the list and find the vnode.
* 2) Lock interlock so that the vnode does not go away.
* 3) Unlock the list to avoid lock order reversals.
* 4) vget with LK_INTERLOCK and check for ENOENT, or
* 5) Check for XLOCK if the vnode lock is not required.
* 6) Perform your operation, then vput().
*
* XXX Not all fields are locked yet and some fields that are marked are not
* locked consistently. This is a work in progress. Requires Giant!
*/
struct vnode {
struct mtx v_interlock; /* lock for "i" things */
u_long v_iflag; /* i vnode flags (see below) */
int v_usecount; /* i ref count of users */
long v_numoutput; /* i writes in progress */
struct thread *v_vxthread; /* i thread owning VXLOCK */
int v_holdcnt; /* i page & buffer references */
struct buflists v_cleanblkhd; /* i SORTED clean blocklist */
struct buf *v_cleanblkroot; /* i clean buf splay tree */
int v_cleanbufcnt; /* i number of clean buffers */
struct buflists v_dirtyblkhd; /* i SORTED dirty blocklist */
struct buf *v_dirtyblkroot; /* i dirty buf splay tree */
int v_dirtybufcnt; /* i number of dirty buffers */
u_long v_vflag; /* v vnode flags */
int v_writecount; /* v ref count of writers */
struct vm_object *v_object; /* v Place to store VM object */
daddr_t v_lastw; /* v last write (write cluster) */
daddr_t v_cstart; /* v start block of cluster */
daddr_t v_lasta; /* v last allocation (cluster) */
int v_clen; /* v length of current cluster */
union {
struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */
struct socket *vu_socket; /* v unix ipc (VSOCK) */
struct {
struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */
} vu_spec;
struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
} v_un;
TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */
enum vtype v_type; /* u vnode type */
const char *v_tag; /* u type of underlying data */
void *v_data; /* u private data for fs */
struct lock v_lock; /* u used if fs don't have one */
struct lock *v_vnlock; /* u pointer to vnode lock */
vop_t **v_op; /* u vnode operations vector */
struct mount *v_mount; /* u ptr to vfs we are in */
LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
u_long v_id; /* c capability identifier */
struct vnode *v_dd; /* c .. vnode */
u_long v_ddid; /* c .. capability identifier */
struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
struct label *v_label; /* MAC label for vnode */
#ifdef DEBUG_LOCKS
const char *filename; /* Source file doing locking */
int line; /* Line number doing locking */
#endif
dev_t v_cachedfs; /* cached fs id */
ino_t v_cachedid; /* cached file id */
int v_bsize; /* block size for I/O */
};
#define v_mountedhere v_un.vu_mountedhere
#define v_socket v_un.vu_socket
#define v_rdev v_un.vu_spec.vu_cdev
#define v_specnext v_un.vu_spec.vu_specnext
#define v_fifoinfo v_un.vu_fifoinfo
/*
* Userland version of struct vnode, for sysctl.
*/
struct xvnode {
size_t xv_size; /* sizeof(struct xvnode) */
void *xv_vnode; /* address of real vnode */
u_long xv_flag; /* vnode vflags */
int xv_usecount; /* reference count of users */
int xv_writecount; /* reference count of writers */
int xv_holdcnt; /* page & buffer references */
u_long xv_id; /* capability identifier */
void *xv_mount; /* address of parent mount */
long xv_numoutput; /* num of writes in progress */
enum vtype xv_type; /* vnode type */
union {
void *xvu_socket; /* socket, if VSOCK */
void *xvu_fifo; /* fifo, if VFIFO */
dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
struct {
dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
} xv_uns;
} xv_un;
};
#define xv_socket xv_un.xvu_socket
#define xv_fifo xv_un.xvu_fifo
#define xv_rdev xv_un.xvu_rdev
#define xv_dev xv_un.xv_uns.xvu_dev
#define xv_ino xv_un.xv_uns.xvu_ino
#define VN_POLLEVENT(vp, events) \
do { \
if ((vp)->v_pollinfo != NULL && \
(vp)->v_pollinfo->vpi_events & (events)) \
vn_pollevent((vp), (events)); \
} while (0)
#define VN_KNOTE(vp, b, a) \
do { \
if ((vp)->v_pollinfo != NULL) \
KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
} while (0)
#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
/*
* Vnode flags.
* VI flags are protected by interlock and live in v_iflag
* VV flags are protected by the vnode lock and live in v_vflag
*/
#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */
#define VI_XWANT 0x0002 /* thread is waiting for vnode */
#define VI_BWAIT 0x0004 /* waiting for output to complete */
#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */
#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */
#define VI_MOUNT 0x0020 /* Mount in progress */
#define VI_AGE 0x0040 /* Insert vnode at head of free list */
#define VI_DOOMED 0x0080 /* This vnode is being recycled */
#define VI_FREE 0x0100 /* This vnode is on the freelist */
#define VI_OBJDIRTY 0x0400 /* object might be dirty */
#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
/*
* XXX VI_ONWORKLST could be replaced with a check for NULL list elements
* in v_synclist.
*/
#define VI_ONWORKLST 0x0200 /* On syncer work-list */
#define VV_ROOT 0x0001 /* root of its filesystem */
#define VV_ISTTY 0x0002 /* vnode represents a tty */
#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */
#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
#define VV_TEXT 0x0020 /* vnode is a pure text prototype */
#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
#define VV_SYSTEM 0x0080 /* vnode being used by kernel */
#define VV_PROCDEP 0x0100 /* vnode is process dependent */
/*
* Vnode attributes. A field value of VNOVAL represents a field whose value
* is unavailable (getattr) or which is not to be changed (setattr).
*/
struct vattr {
enum vtype va_type; /* vnode type (for create) */
u_short va_mode; /* files access mode and type */
short va_nlink; /* number of references to file */
uid_t va_uid; /* owner user id */
gid_t va_gid; /* owner group id */
dev_t va_fsid; /* filesystem id */
long va_fileid; /* file id */
u_quad_t va_size; /* file size in bytes */
long va_blocksize; /* blocksize preferred for i/o */
struct timespec va_atime; /* time of last access */
struct timespec va_mtime; /* time of last modification */
struct timespec va_ctime; /* time file changed */
struct timespec va_birthtime; /* time file created */
u_long va_gen; /* generation number of file */
u_long va_flags; /* flags defined for file */
dev_t va_rdev; /* device the special file represents */
u_quad_t va_bytes; /* bytes of disk space held by file */
u_quad_t va_filerev; /* file modification number */
u_int va_vaflags; /* operations flags, see below */
long va_spare; /* remain quad aligned */
};
/*
* Flags for va_vaflags.
*/
#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
#define VA_EXCLUSIVE 0x02 /* exclusive create request */
/*
* Flags for ioflag. (high 16 bits used to ask for read-ahead and
* help with write clustering)
*/
#define IO_UNIT 0x0001 /* do I/O as atomic unit */
#define IO_APPEND 0x0002 /* append write to end */
#define IO_SYNC 0x0004 /* do I/O synchronously */
#define IO_NODELOCKED 0x0008 /* underlying node already locked */
#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
#define IO_VMIO 0x0020 /* data already in VMIO space */
#define IO_INVAL 0x0040 /* invalidate after I/O */
#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
#define IO_EXT 0x0400 /* operate on external attributes */
#define IO_NORMAL 0x0800 /* operate on regular data */
#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
#define IO_SEQMAX 0x7F /* seq heuristic max value */
#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
/*
* Modes. Some values same as Ixxx entries from inode.h for now.
*/
#define VEXEC 000100 /* execute/search permission */
#define VWRITE 000200 /* write permission */
#define VREAD 000400 /* read permission */
#define VSVTX 001000 /* save swapped text even after use */
#define VSGID 002000 /* set group id on execution */
#define VSUID 004000 /* set user id on execution */
#define VADMIN 010000 /* permission to administer */
#define VSTAT 020000 /* permission to retrieve attrs */
#define VAPPEND 040000 /* permission to write/append */
#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
/*
* Token indicating no attribute value yet assigned.
*/
#define VNOVAL (-1)
/*
* LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
*/
#define VLKTIMEOUT (hz / 20 + 1)
#ifdef _KERNEL
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_VNODE);
#endif
/*
* Convert between vnode types and inode formats (since POSIX.1
* defines mode word of stat structure in terms of inode formats).
*/
extern enum vtype iftovt_tab[];
extern int vttoif_tab[];
#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
/*
* Flags to various vnode functions.
*/
#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
#define FORCECLOSE 0x0002 /* vflush: force file closure */
#define WRITECLOSE 0x0004 /* vflush: only close writable files */
#define DOCLOSE 0x0008 /* vclean: close active files */
#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
#define VREF(vp) vref(vp)
#ifdef DIAGNOSTIC
#define VATTR_NULL(vap) vattr_null(vap)
#else
#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
#endif /* DIAGNOSTIC */
#define NULLVP ((struct vnode *)NULL)
#define VNODEOP_SET(f) \
C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \
C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f);
/*
* Global vnode data.
*/
extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
extern int async_io_version; /* 0 or POSIX version of AIO i'face */
extern int desiredvnodes; /* number of vnodes desired */
extern struct uma_zone *namei_zone;
extern int prtactive; /* nonzero to call vprint() */
extern struct vattr va_null; /* predefined null vattr structure */
/*
* Macro/function to check for client cache inconsistency w.r.t. leasing.
*/
#define LEASE_READ 0x1 /* Check lease for readers */
#define LEASE_WRITE 0x2 /* Check lease for modifiers */
extern void (*lease_updatetime)(int deltat);
/* Requires interlock. */
#define VSHOULDFREE(vp) \
(!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \
!(vp)->v_holdcnt && !(vp)->v_usecount && \
(!(vp)->v_object || \
!((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
/* Requires interlock. */
#define VMIGHTFREE(vp) \
(!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \
LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
/* Requires interlock. */
#define VSHOULDBUSY(vp) \
(((vp)->v_iflag & VI_FREE) && \
((vp)->v_holdcnt || (vp)->v_usecount))
#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
#define VI_MTX(vp) (&(vp)->v_interlock)
#endif /* _KERNEL */
/*
* Mods for extensibility.
*/
/*
* Flags for vdesc_flags:
*/
#define VDESC_MAX_VPS 16
/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
#define VDESC_VP0_WILLRELE 0x0001
#define VDESC_VP1_WILLRELE 0x0002
#define VDESC_VP2_WILLRELE 0x0004
#define VDESC_VP3_WILLRELE 0x0008
#define VDESC_NOMAP_VPP 0x0100
#define VDESC_VPP_WILLRELE 0x0200
/*
* VDESC_NO_OFFSET is used to identify the end of the offset list
* and in places where no such field exists.
*/
#define VDESC_NO_OFFSET -1
/*
* This structure describes the vnode operation taking place.
*/
struct vnodeop_desc {
int vdesc_offset; /* offset in vector,first for speed */
char *vdesc_name; /* a readable name for debugging */
int vdesc_flags; /* VDESC_* flags */
/*
* These ops are used by bypass routines to map and locate arguments.
* Creds and procs are not needed in bypass routines, but sometimes
* they are useful to (for example) transport layers.
* Nameidata is useful because it has a cred in it.
*/
int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
int vdesc_vpp_offset; /* return vpp location */
int vdesc_cred_offset; /* cred location, if any */
int vdesc_thread_offset; /* thread location, if any */
int vdesc_componentname_offset; /* if any */
/*
* Finally, we've got a list of private data (about each operation)
* for each transport layer. (Support to manage this list is not
* yet part of BSD.)
*/
caddr_t *vdesc_transports;
};
#ifdef _KERNEL
/*
* A list of all the operation descs.
*/
extern struct vnodeop_desc *vnodeop_descs[];
#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
((s_type)(((char*)(struct_p)) + (s_offset)))
/*
* This structure is used to configure the new vnodeops vector.
*/
struct vnodeopv_entry_desc {
struct vnodeop_desc *opve_op; /* which operation this is */
vop_t *opve_impl; /* code implementing this operation */
};
struct vnodeopv_desc {
/* ptr to the ptr to the vector where op should go */
vop_t ***opv_desc_vector_p;
struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
};
/*
* A generic structure.
* This can be used by bypass routines to identify generic arguments.
*/
struct vop_generic_args {
struct vnodeop_desc *a_desc;
/* other random data follows, presumably */
};
#ifdef DEBUG_VFS_LOCKS
/*
* Support code to aid in debugging VFS locking problems. Not totally
* reliable since if the thread sleeps between changing the lock
* state and checking it with the assert, some other thread could
* change the state. They are good enough for debugging a single
* filesystem using a single-threaded test.
*/
void assert_vi_locked(struct vnode *vp, const char *str);
void assert_vi_unlocked(struct vnode *vp, const char *str);
#if 0
void assert_vop_elocked(struct vnode *vp, const char *str);
void assert_vop_elocked_other(struct vnode *vp, const char *str);
#endif
void assert_vop_locked(struct vnode *vp, const char *str);
#if 0
voi0 assert_vop_slocked(struct vnode *vp, const char *str);
#endif
void assert_vop_unlocked(struct vnode *vp, const char *str);
/* These are called from within the actual VOPS. */
void vop_lock_pre(void *a);
void vop_lock_post(void *a, int rc);
void vop_lookup_post(void *a, int rc);
void vop_lookup_pre(void *a);
void vop_rename_pre(void *a);
void vop_strategy_pre(void *a);
void vop_unlock_post(void *a, int rc);
void vop_unlock_pre(void *a);
#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
#if 0
#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
#endif
#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
#if 0
#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
#endif
#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
#else /* !DEBUG_VFS_LOCKS */
#define ASSERT_VI_LOCKED(vp, str)
#define ASSERT_VI_UNLOCKED(vp, str)
#if 0
#define ASSERT_VOP_ELOCKED(vp, str)
#define ASSERT_VOP_ELOCKED_OTHER(vp, str)
#endif
#define ASSERT_VOP_LOCKED(vp, str)
#if 0
#define ASSERT_VOP_SLOCKED(vp, str)
#endif
#define ASSERT_VOP_UNLOCKED(vp, str)
#endif /* DEBUG_VFS_LOCKS */
/*
* VOCALL calls an op given an ops vector. We break it out because BSD's
* vclean changes the ops vector and then wants to call ops with the old
* vector.
*/
#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
/*
* This call works for vnodes in the kernel.
*/
#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
#define VDESC(OP) (& __CONCAT(OP,_desc))
#define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
/*
* VMIO support inline
*/
extern int vmiodirenable;
static __inline int
vn_canvmio(struct vnode *vp)
{
if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
return(TRUE);
return(FALSE);
}
/*
* Finally, include the default set of vnode operations.
*/
#include "vnode_if.h"
/*
* Public vnode manipulation functions.
*/
struct componentname;
struct file;
struct mount;
struct nameidata;
struct ostat;
struct thread;
struct proc;
struct stat;
struct nstat;
struct ucred;
struct uio;
struct vattr;
struct vnode;
extern int (*lease_check_hook)(struct vop_lease_args *);
extern int (*softdep_fsync_hook)(struct vnode *);
extern int (*softdep_process_worklist_hook)(struct mount *);
struct vnode *addaliasu(struct vnode *vp, dev_t nvp_rdev);
int bdevvp(struct cdev *dev, struct vnode **vpp);
/* cache_* may belong in namei.h. */
void cache_enter(struct vnode *dvp, struct vnode *vp,
struct componentname *cnp);
int cache_lookup(struct vnode *dvp, struct vnode **vpp,
struct componentname *cnp);
void cache_purge(struct vnode *vp);
void cache_purgevfs(struct mount *mp);
int cache_leaf_test(struct vnode *vp);
int change_dir(struct vnode *vp, struct thread *td);
int change_root(struct vnode *vp, struct thread *td);
void cvtstat(struct stat *st, struct ostat *ost);
void cvtnstat(struct stat *sb, struct nstat *nsb);
int getnewvnode(const char *tag, struct mount *mp, vop_t **vops,
struct vnode **vpp);
int lease_check(struct vop_lease_args *ap);
int spec_vnoperate(struct vop_generic_args *);
int speedup_syncer(void);
#define textvp_fullpath(p, rb, rfb) \
vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
int vn_fullpath(struct thread *td, struct vnode *vn,
char **retbuf, char **freebuf);
int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid,
mode_t acc_mode, struct ucred *cred, int *privused);
int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
gid_t file_gid, struct acl *acl, mode_t acc_mode,
struct ucred *cred, int *privused);
void vattr_null(struct vattr *vap);
int vcount(struct vnode *vp);
void vdrop(struct vnode *);
void vdropl(struct vnode *);
int vfinddev(struct cdev *dev, struct vnode **vpp);
void vfs_add_vnodeops(const void *);
void vfs_rm_vnodeops(const void *);
int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
int vget(struct vnode *vp, int lockflag, struct thread *td);
void vgone(struct vnode *vp);
void vgonel(struct vnode *vp, struct thread *td);
void vhold(struct vnode *);
void vholdl(struct vnode *);
int vinvalbuf(struct vnode *vp, int save, struct ucred *cred,
struct thread *td, int slpflag, int slptimeo);
int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
off_t length, int blksize);
void vprint(char *label, struct vnode *vp);
int vrecycle(struct vnode *vp, struct mtx *inter_lkp,
struct thread *td);
int vn_close(struct vnode *vp,
int flags, struct ucred *file_cred, struct thread *td);
void vn_finished_write(struct mount *mp);
int vn_isdisk(struct vnode *vp, int *errp);
int vn_lock(struct vnode *vp, int flags, struct thread *td);
#ifdef DEBUG_LOCKS
int debug_vn_lock(struct vnode *vp, int flags, struct thread *p,
const char *filename, int line);
#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
#endif
int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx);
int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
struct ucred *cred, int fdidx);
void vn_pollevent(struct vnode *vp, int events);
void vn_pollgone(struct vnode *vp);
int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
int len, off_t offset, enum uio_seg segflg, int ioflg,
struct ucred *active_cred, struct ucred *file_cred, int *aresid,
struct thread *td);
int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base,
size_t len, off_t offset, enum uio_seg segflg, int ioflg,
struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
struct thread *td);
int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
struct ucred *file_cred, struct thread *td);
int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
struct cdev *vn_todev(struct vnode *vp);
int vn_write_suspend_wait(struct vnode *vp, struct mount *mp,
int flags);
int vn_writechk(struct vnode *vp);
int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
const char *attrname, int *buflen, char *buf, struct thread *td);
int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
const char *attrname, int buflen, char *buf, struct thread *td);
int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
const char *attrname, struct thread *td);
int vfs_cache_lookup(struct vop_lookup_args *ap);
int vfs_object_create(struct vnode *vp, struct thread *td,
struct ucred *cred);
void vfs_timestamp(struct timespec *);
void vfs_write_resume(struct mount *mp);
int vfs_write_suspend(struct mount *mp);
int vop_stdbmap(struct vop_bmap_args *);
int vop_stdfsync(struct vop_fsync_args *);
int vop_stdgetwritemount(struct vop_getwritemount_args *);
int vop_stdgetpages(struct vop_getpages_args *);
int vop_stdinactive(struct vop_inactive_args *);
int vop_stdislocked(struct vop_islocked_args *);
int vop_stdlock(struct vop_lock_args *);
int vop_stdputpages(struct vop_putpages_args *);
int vop_stdunlock(struct vop_unlock_args *);
int vop_nopoll(struct vop_poll_args *);
int vop_stdpathconf(struct vop_pathconf_args *);
int vop_stdpoll(struct vop_poll_args *);
int vop_revoke(struct vop_revoke_args *);
int vop_eopnotsupp(struct vop_generic_args *ap);
int vop_ebadf(struct vop_generic_args *ap);
int vop_einval(struct vop_generic_args *ap);
int vop_enotty(struct vop_generic_args *ap);
int vop_defaultop(struct vop_generic_args *ap);
int vop_null(struct vop_generic_args *ap);
int vop_panic(struct vop_generic_args *ap);
int vop_stdcreatevobject(struct vop_createvobject_args *ap);
int vop_stddestroyvobject(struct vop_destroyvobject_args *ap);
int vop_stdgetvobject(struct vop_getvobject_args *ap);
void vfree(struct vnode *);
void vput(struct vnode *vp);
void vrele(struct vnode *vp);
void vref(struct vnode *vp);
int vrefcnt(struct vnode *vp);
void vbusy(struct vnode *vp);
void v_addpollinfo(struct vnode *vp);
extern vop_t **default_vnodeop_p;
extern vop_t **spec_vnodeop_p;
extern vop_t **dead_vnodeop_p;
#endif /* _KERNEL */
#endif /* !_SYS_VNODE_H_ */