Fix a buffer cache deadlock which can occur when simulated disk devices
[dragonfly.git] / sys / sys / vnode.h
CommitLineData
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1/*
2 * Copyright (c) 1989, 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. 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.
20 *
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
31 * SUCH DAMAGE.
32 *
33 * @(#)vnode.h 8.7 (Berkeley) 2/4/94
34 * $FreeBSD: src/sys/sys/vnode.h,v 1.111.2.19 2002/12/29 18:19:53 dillon Exp $
67863d04 35 * $DragonFly: src/sys/sys/vnode.h,v 1.83 2008/09/17 21:44:19 dillon Exp $
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36 */
37
38#ifndef _SYS_VNODE_H_
39#define _SYS_VNODE_H_
40
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41#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
42
43#ifndef _SYS_QUEUE_H_
984263bc 44#include <sys/queue.h>
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45#endif
46#ifndef _SYS_LOCK_H_
984263bc 47#include <sys/lock.h>
03d6a592 48#endif
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49#ifndef _SYS_SELINFO_H_
50#include <sys/selinfo.h>
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51#endif
52#ifndef _SYS_BIOTRACK_H_
81b5c339 53#include <sys/biotrack.h>
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54#endif
55#ifndef _SYS_UIO_H_
984263bc 56#include <sys/uio.h>
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57#endif
58#ifndef _SYS_ACL_H_
984263bc 59#include <sys/acl.h>
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60#endif
61#ifndef _SYS_NAMECACHE_H_
7ea21ed1 62#include <sys/namecache.h>
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63#endif
64#ifndef _SYS_THREAD_H_
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65#include <sys/thread.h>
66#endif
03d6a592 67#ifndef _SYS_VFSOPS_H_
0961aa92 68#include <sys/vfsops.h>
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69#endif
70#ifndef _SYS_VFSCACHE_H_
0961aa92 71#include <sys/vfscache.h>
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72#endif
73#ifndef _SYS_TREE_H_
6bae6177 74#include <sys/tree.h>
03d6a592 75#endif
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76#ifndef _SYS_SYSLINK_RPC_H_
77#include <sys/syslink_rpc.h>
31bd717a 78#endif
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79#ifndef _SYS_SYSREF_H_
80#include <sys/sysref.h>
81#endif
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82#ifndef _SYS_CCMS_H_
83#include <sys/ccms.h>
84#endif
03d6a592 85#ifndef _MACHINE_LOCK_H_
984263bc 86#include <machine/lock.h>
03d6a592 87#endif
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88
89/*
90 * The vnode is the focus of all file activity in UNIX. There is a
91 * unique vnode allocated for each active file, each current directory,
92 * each mounted-on file, text file, and the root.
93 */
94
95/*
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96 * Each underlying filesystem allocates its own private area and hangs
97 * it from v_data. If non-null, this area is freed in getnewvnode().
98 */
99TAILQ_HEAD(buflists, buf);
100
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101/*
102 * Range locks protect offset ranges in files and directories at a high
103 * level, allowing the actual I/O to be broken down into smaller pieces.
104 * Range locks will eventually be integrated into the clustered cache
105 * coherency infrastructure.
106 *
107 * We use a simple data structure for now, but eventually this should
108 * probably be a btree or red-black tree.
109 */
110struct vrangelock;
111
112TAILQ_HEAD(vrangelock_list, vrangelock);
113
114struct vrangehead {
115 struct vrangelock_list vh_list;
116};
117
118struct vrangelock {
119 TAILQ_ENTRY(vrangelock) vr_node;
120 int vr_flags;
121 off_t vr_offset;
122 off_t vr_length;
123};
124
125#define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */
126#define RNGL_CHECK 0x0002 /* check for work on unlock */
127#define RNGL_SHARED 0x0004 /* shared lock, else exclusive */
128#define RNGL_ONLIST 0x0008 /* sanity check */
129
130static __inline
131void
132vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length)
133{
134 vr->vr_flags = flags;
135 vr->vr_offset = offset;
136 vr->vr_length = length;
137}
138
139#ifdef _KERNEL
140
141void vrange_lock(struct vnode *vp, struct vrangelock *vr);
142void vrange_unlock(struct vnode *vp, struct vrangelock *vr);
143
144static __inline
145void
146vrange_lock_shared(struct vnode *vp, struct vrangelock *vr,
147 off_t offset, off_t length)
148{
149 vrange_init(vr, RNGL_SHARED, offset, length);
150 vrange_lock(vp, vr);
151}
152
153static __inline
154void
155vrange_lock_excl(struct vnode *vp, struct vrangelock *vr,
156 off_t offset, off_t length)
157{
158 vrange_init(vr, 0, offset, length);
159 vrange_lock(vp, vr);
160}
161
162#endif
0961aa92 163
984263bc 164/*
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165 * The vnode infrastructure is being reorgranized. Most reference-related
166 * fields are locked by the BGL, and most file I/O related operations and
167 * vnode teardown functions are locked by the vnode lock.
168 *
169 * File read operations require a shared lock, file write operations require
170 * an exclusive lock. Most directory operations (read or write) currently
171 * require an exclusive lock due to the side effects stored in the directory
172 * inode (which we intend to fix).
173 *
174 * File reads and writes are further protected by a range lock. The intention
175 * is to be able to break I/O operations down into more easily managed pieces
176 * so vm_page arrays can be passed through rather then UIOs. This work will
177 * occur in multiple stages. The range locks will also eventually be used to
178 * deal with clustered cache coherency issues and, more immediately, to
179 * protect operations associated with the kernel-managed journaling module.
e4c9c0c8 180 *
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181 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
182 * typically points to &v_mount->mnt_vn_use_ops. We use a double
183 * pointer because mnt_vn_use_ops may change dynamically when e.g.
184 * journaling is turned on or off.
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185 *
186 * NOTE: v_filesize is currently only applicable when a VM object is
187 * associated with the vnode. Otherwise it will be set to NOOFFSET.
984263bc 188 */
6bae6177 189RB_HEAD(buf_rb_tree, buf);
1f1ea522 190RB_HEAD(buf_rb_hash, buf);
6bae6177 191
984263bc 192struct vnode {
6b008938 193 int v_flag; /* vnode flags (see below) */
81b5c339 194 int v_writecount;
e4c9c0c8 195 int v_opencount; /* number of explicit opens */
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196 int v_auxrefs; /* auxiliary references */
197 struct sysref v_sysref; /* normal references */
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198 struct bio_track v_track_read; /* track I/O's in progress */
199 struct bio_track v_track_write; /* track I/O's in progress */
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200 struct mount *v_mount; /* ptr to vfs we are in */
201 struct vop_ops **v_ops; /* vnode operations vector */
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202 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
203 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
6bae6177 204 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */
54df1108 205 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */
1f1ea522 206 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */
984263bc 207 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
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208 enum vtype v_type; /* vnode type */
209 union {
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210 struct socket *vu_socket; /* unix ipc (VSOCK) */
211 struct {
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212 int vu_umajor; /* device number for attach */
213 int vu_uminor;
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214 struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */
215 SLIST_ENTRY(vnode) vu_cdevnext;
216 } vu_cdev;
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217 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
218 } v_un;
57f7b636 219 off_t v_filesize; /* file EOF or NOOFFSET */
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220 off_t v_lazyw; /* lazy write iterator */
221 off_t v_lastw; /* last write (write cluster) */
222 off_t v_cstart; /* start block of cluster */
223 off_t v_lasta; /* last allocation */
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224 int v_clen; /* length of current cluster */
225 struct vm_object *v_object; /* Place to store VM object */
3446c007 226 struct lock v_lock; /* file/dir ops lock */
984263bc 227 enum vtagtype v_tag; /* type of underlying data */
597aea93 228 void *v_data; /* private data for fs */
7ea21ed1 229 struct namecache_list v_namecache; /* associated nc entries */
984263bc 230 struct {
8a8d5d85 231 struct lwkt_token vpi_token; /* lock to protect below */
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232 struct selinfo vpi_selinfo; /* identity of poller(s) */
233 short vpi_events; /* what they are looking for */
234 short vpi_revents; /* what has happened */
235 } v_pollinfo;
29802dbb 236 struct vmresident *v_resident; /* optional vmresident */
6ddb7618 237 struct vrangehead v_range; /* range lock */
9bfc4d6d 238 struct ccms_dataspace v_ccms; /* cache coherency */
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239#ifdef DEBUG_LOCKS
240 const char *filename; /* Source file doing locking */
241 int line; /* Line number doing locking */
242#endif
5fd012e0 243 void *v_xaddr;
984263bc 244};
984263bc 245#define v_socket v_un.vu_socket
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246#define v_umajor v_un.vu_cdev.vu_umajor
247#define v_uminor v_un.vu_cdev.vu_uminor
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248#define v_rdev v_un.vu_cdev.vu_cdevinfo
249#define v_cdevnext v_un.vu_cdev.vu_cdevnext
984263bc 250#define v_fifoinfo v_un.vu_fifoinfo
9d265729 251#define v_spinlock v_lock.lk_spinlock
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252
253#define VN_POLLEVENT(vp, events) \
254 do { \
255 if ((vp)->v_pollinfo.vpi_events & (events)) \
256 vn_pollevent((vp), (events)); \
257 } while (0)
258
259/*
260 * Vnode flags.
261 */
262#define VROOT 0x00001 /* root of its file system */
263#define VTEXT 0x00002 /* vnode is a pure text prototype */
264#define VSYSTEM 0x00004 /* vnode being used by kernel */
265#define VISTTY 0x00008 /* vnode represents a tty */
5fd012e0 266#define VCTTYISOPEN 0x00010 /* controlling terminal tty is open */
12693083 267#define VCKPT 0x00020 /* checkpoint-restored vnode */
6b008938 268#define VFSMID 0x00040 /* request FSMID update */
7749886d 269#define VMAYHAVELOCKS 0x00080 /* there may be posix or flock locks on vp */
67863d04 270#define VPFSROOT 0x00100 /* may be a pseudo filesystem root */
5fd012e0 271/* open for business 0x00200 */
81b5c339 272/* open for business 0x00400 */
984263bc 273/* open for business 0x00800 */
3c37c940 274#define VCACHED 0x01000 /* No active references but has cache value */
984263bc 275#define VOBJBUF 0x02000 /* Allocate buffers in VM object */
3c37c940 276#define VINACTIVE 0x04000 /* The vnode is inactive (did VOP_INACTIVE) */
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277#define VAGE 0x08000 /* Insert vnode at head of free list */
278#define VOLOCK 0x10000 /* vnode is locked waiting for an object */
279#define VOWANT 0x20000 /* a process is waiting for VOLOCK */
5fd012e0 280#define VRECLAIMED 0x40000 /* This vnode has been destroyed */
984263bc 281#define VFREE 0x80000 /* This vnode is on the freelist */
5fd012e0 282/* open for business 0x100000 */
984263bc 283#define VONWORKLST 0x200000 /* On syncer work-list */
1d505369 284#define VMOUNT 0x400000 /* Mount in progress */
597aea93 285#define VOBJDIRTY 0x800000 /* object might be dirty */
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286
287/*
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288 * vmntvnodescan() flags
289 */
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290#define VMSC_GETVP 0x01
291#define VMSC_GETVX 0x02
5fd012e0 292#define VMSC_NOWAIT 0x10
19b97e01 293#define VMSC_ONEPASS 0x20
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294
295/*
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296 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
297 * help with write clustering)
298 */
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299#define IO_UNIT 0x0001 /* do I/O as atomic unit */
300#define IO_APPEND 0x0002 /* append write to end */
301#define IO_SYNC 0x0004 /* do I/O synchronously */
302#define IO_NODELOCKED 0x0008 /* underlying node already locked */
303#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
304#define IO_VMIO 0x0020 /* data already in VMIO space */
305#define IO_INVAL 0x0040 /* invalidate after I/O */
306#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
597aea93 307#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
cb63d1bc 308#define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */
597aea93 309#define IO_CORE 0x0400 /* I/O is part of core dump */
984263bc 310
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311#define IO_SEQMAX 0x7F /* seq heuristic max value */
312#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
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313
314/*
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315 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
316 * and SVTX flag bits.
317 *
318 * VCREATE, VDELETE, and VEXCL may only be used in naccess() calls.
984263bc 319 */
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320#define VDELETE 040000 /* delete if the file/dir exists */
321#define VCREATE 020000 /* create if the file/dir does not exist */
322#define VEXCL 010000 /* error if the file/dir already exists */
323
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324#define VSUID 04000 /* set user id on execution */
325#define VSGID 02000 /* set group id on execution */
326#define VSVTX 01000 /* save swapped text even after use */
327#define VREAD 00400 /* read, write, execute permissions */
328#define VWRITE 00200
329#define VEXEC 00100
330
331/*
332 * Token indicating no attribute value yet assigned.
333 */
334#define VNOVAL (-1)
335
336/*
337 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
338 */
597aea93 339#define VLKTIMEOUT (hz / 20 + 1)
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340
341#ifdef _KERNEL
342
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343/*
344 * Convert between vnode types and inode formats (since POSIX.1
345 * defines mode word of stat structure in terms of inode formats).
346 */
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347extern enum vtype iftovt_tab[];
348extern int vttoif_tab[];
349#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
350#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
351#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
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352
353/*
354 * Flags to various vnode functions.
355 */
356#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
357#define FORCECLOSE 0x0002 /* vflush: force file closure */
358#define WRITECLOSE 0x0004 /* vflush: only close writable files */
359#define DOCLOSE 0x0008 /* vclean: close active files */
360#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
361#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
362
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363#ifdef DIAGNOSTIC
364#define VATTR_NULL(vap) vattr_null(vap)
365#else
366#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
367#endif /* DIAGNOSTIC */
368
369#define NULLVP ((struct vnode *)NULL)
370
371#define VNODEOP_SET(f) \
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372 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
373 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
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374
375/*
376 * Global vnode data.
377 */
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378struct objcache;
379
984263bc 380extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
28623bf9 381extern struct nchandle rootnch; /* root (i.e. "/") namecache */
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382extern int desiredvnodes; /* number of vnodes desired */
383extern time_t syncdelay; /* max time to delay syncing data */
384extern time_t filedelay; /* time to delay syncing files */
385extern time_t dirdelay; /* time to delay syncing directories */
386extern time_t metadelay; /* time to delay syncing metadata */
70aac194 387extern struct objcache *namei_oc;
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388extern int prtactive; /* nonzero to call vprint() */
389extern struct vattr va_null; /* predefined null vattr structure */
390extern int vfs_ioopt;
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391extern int numvnodes;
392extern int freevnodes;
fad57d0e 393extern int vfs_fastdev; /* fast specfs device access */
984263bc 394
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395/*
396 * Interlock for scanning list of vnodes attached to a mountpoint
397 */
8a8d5d85 398extern struct lwkt_token mntvnode_token;
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399
400/*
401 * This macro is very helpful in defining those offsets in the vdesc struct.
402 *
403 * This is stolen from X11R4. I ignored all the fancy stuff for
404 * Crays, so if you decide to port this to such a serious machine,
405 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
406 */
597aea93 407#define VOPARG_OFFSET(p_type,field) \
984263bc 408 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
597aea93 409#define VOPARG_OFFSETOF(s_type,field) \
984263bc 410 VOPARG_OFFSET(s_type*,field)
597aea93 411#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
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412 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
413
625ddaba 414typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
984263bc 415
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416/*
417 * VOCALL calls an op given an ops vector. We break it out because BSD's
418 * vclean changes the ops vector and then wants to call ops with the old
419 * vector.
420 */
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421
422typedef int (*vocall_func_t)(struct vop_generic_args *);
423
984263bc 424/*
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425 * This call executes the vops vector for the offset stored in the ap's
426 * descriptor of the passed vops rather then the one related to the
427 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
428 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
429 * vector function).
984263bc 430 */
0961aa92 431#define VOCALL(vops, ap) \
31bd717a 432 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
0961aa92 433
597aea93 434#define VDESC(OP) (& __CONCAT(OP,_desc))
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435
436/*
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437 * Public vnode manipulation functions.
438 */
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439struct file;
440struct mount;
fad57d0e 441struct nlookupdata;
984263bc 442struct proc;
dadab5e9 443struct thread;
984263bc 444struct stat;
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445struct ucred;
446struct uio;
447struct vattr;
448struct vnode;
984263bc 449
a8873631 450struct vnode *getsynthvnode(const char *devname);
0e9b9130 451void addaliasu (struct vnode *vp, int x, int y);
b13267a5 452int v_associate_rdev(struct vnode *vp, cdev_t dev);
e4c9c0c8 453void v_release_rdev(struct vnode *vp);
b13267a5 454int bdevvp (cdev_t dev, struct vnode **vpp);
5fd012e0 455struct vnode *allocvnode(int lktimeout, int lkflags);
3c37c940 456int freesomevnodes(int count);
6ddb7618 457int getnewvnode (enum vtagtype tag, struct mount *mp,
3446c007 458 struct vnode **vpp, int timo, int lkflags);
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459int getspecialvnode (enum vtagtype tag, struct mount *mp,
460 struct vop_ops **ops, struct vnode **vpp, int timo,
461 int lkflags);
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462int spec_vnoperate (struct vop_generic_args *);
463int speedup_syncer (void);
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464void vattr_null (struct vattr *vap);
465int vcount (struct vnode *vp);
b13267a5 466int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
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467void vfs_nadd_vnodeops_sysinit (void *);
468void vfs_nrm_vnodeops_sysinit (void *);
469void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
470void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
b153f746 471int vflush (struct mount *mp, int rootrefs, int flags);
5fd012e0 472int vmntvnodescan(struct mount *mp, int flags,
41a01a4d 473 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
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474 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
475 void *data);
476void insmntque(struct vnode *vp, struct mount *mp);
41a01a4d 477
3c37c940 478void vclean_vxlocked (struct vnode *vp, int flags);
cf683bae 479void vclean_unlocked (struct vnode *vp);
3c37c940 480void vgone_vxlocked (struct vnode *vp);
6b008938 481void vupdatefsmid (struct vnode *vp);
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482int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
483int vtruncbuf (struct vnode *vp, off_t length, int blksize);
4e0ecc94 484int vfsync(struct vnode *vp, int waitfor, int passes,
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485 int (*checkdef)(struct buf *),
486 int (*waitoutput)(struct vnode *, struct thread *));
1c843a13 487int vinitvmio(struct vnode *vp, off_t filesize);
b153f746 488void vprint (char *label, struct vnode *vp);
87de5057 489int vrecycle (struct vnode *vp);
2ec4b00d 490int vmaxiosize (struct vnode *vp);
81b5c339 491void vn_strategy(struct vnode *vp, struct bio *bio);
87de5057 492int vn_close (struct vnode *vp, int flags);
b153f746 493int vn_isdisk (struct vnode *vp, int *errp);
ca466bae 494int vn_lock (struct vnode *vp, int flags);
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495int vn_islocked (struct vnode *vp);
496void vn_unlock (struct vnode *vp);
984263bc 497#ifdef DEBUG_LOCKS
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498int debug_vn_lock (struct vnode *vp, int flags,
499 const char *filename, int line);
500#define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__)
984263bc 501#endif
b310dfc4 502
5d72d6ed 503int vn_get_namelen(struct vnode *, int *);
fad57d0e 504void vn_setspecops (struct file *fp);
b310dfc4 505int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
fad57d0e 506int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
a8873631 507int vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
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508void vn_pollevent (struct vnode *vp, int events);
509void vn_pollgone (struct vnode *vp);
87de5057 510int vn_pollrecord (struct vnode *vp, int events);
b153f746 511int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
984263bc 512 int len, off_t offset, enum uio_seg segflg, int ioflg,
87de5057 513 struct ucred *cred, int *aresid);
b153f746 514int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
984263bc 515 int len, off_t offset, enum uio_seg segflg, int ioflg,
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MD
516 struct ucred *cred, int *aresid);
517int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
b13267a5 518cdev_t vn_todev (struct vnode *vp);
b153f746 519void vfs_timestamp (struct timespec *);
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520int vn_writechk (struct vnode *vp, struct nchandle *nch);
521int ncp_writechk(struct nchandle *nch);
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522int vop_stdopen (struct vop_open_args *ap);
523int vop_stdclose (struct vop_close_args *ap);
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524int vop_stdgetpages(struct vop_getpages_args *ap);
525int vop_stdputpages(struct vop_putpages_args *ap);
2d3e977e 526int vop_nopoll (struct vop_poll_args *ap);
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527int vop_stdpathconf (struct vop_pathconf_args *ap);
528int vop_stdpoll (struct vop_poll_args *ap);
529int vop_stdrevoke (struct vop_revoke_args *ap);
b153f746
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530int vop_eopnotsupp (struct vop_generic_args *ap);
531int vop_ebadf (struct vop_generic_args *ap);
532int vop_einval (struct vop_generic_args *ap);
533int vop_enotty (struct vop_generic_args *ap);
534int vop_defaultop (struct vop_generic_args *ap);
535int vop_null (struct vop_generic_args *ap);
536int vop_panic (struct vop_generic_args *ap);
fc46f680
JS
537int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
538 const char *);
b153f746 539
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MD
540int vop_compat_nresolve(struct vop_nresolve_args *ap);
541int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
542int vop_compat_ncreate(struct vop_ncreate_args *ap);
543int vop_compat_nmkdir(struct vop_nmkdir_args *ap);
544int vop_compat_nmknod(struct vop_nmknod_args *ap);
545int vop_compat_nlink(struct vop_nlink_args *ap);
546int vop_compat_nsymlink(struct vop_nsymlink_args *ap);
547int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
548int vop_compat_nremove(struct vop_nremove_args *ap);
549int vop_compat_nrmdir(struct vop_nrmdir_args *ap);
550int vop_compat_nrename(struct vop_nrename_args *ap);
551
e3332475 552void vx_lock (struct vnode *vp);
5fd012e0 553void vx_unlock (struct vnode *vp);
e3332475 554void vx_get (struct vnode *vp);
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MD
555int vx_get_nonblock (struct vnode *vp);
556void vx_put (struct vnode *vp);
87de5057 557int vget (struct vnode *vp, int lockflag);
597aea93 558void vput (struct vnode *vp);
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559void vhold (struct vnode *);
560void vdrop (struct vnode *);
b153f746 561void vref (struct vnode *vp);
5fd012e0
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562void vrele (struct vnode *vp);
563void vsetflags (struct vnode *vp, int flags);
564void vclrflags (struct vnode *vp, int flags);
565
566void vfs_subr_init(void);
567void vfs_mount_init(void);
568void vfs_lock_init(void);
569void vfs_sync_init(void);
570
571void vn_syncer_add_to_worklist(struct vnode *, int);
572void vnlru_proc_wait(void);
573
66a1ddf5
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574extern struct vop_ops default_vnode_vops;
575extern struct vop_ops spec_vnode_vops;
576extern struct vop_ops dead_vnode_vops;
577
578extern struct vop_ops *default_vnode_vops_p;
579extern struct vop_ops *spec_vnode_vops_p;
580extern struct vop_ops *dead_vnode_vops_p;
984263bc 581
03d6a592 582#endif /* _KERNEL */
984263bc 583
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MD
584#endif /* _KERNEL || _KERNEL_STRUCTURES */
585#endif /* !_SYS_VNODE_H_ */