kernel -- Add O_FRNONBLOCKING, to allow reads which do not block on disk accesses.
[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_EVENT_H_
50#include <sys/event.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
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95/*
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 * Struct for mount options to printable formats.
103 */
104struct mountctl_opt {
105 int o_opt;
106 const char *o_name;
107};
108
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109/*
110 * Range locks protect offset ranges in files and directories at a high
111 * level, allowing the actual I/O to be broken down into smaller pieces.
112 * Range locks will eventually be integrated into the clustered cache
113 * coherency infrastructure.
114 *
115 * We use a simple data structure for now, but eventually this should
116 * probably be a btree or red-black tree.
117 */
118struct vrangelock;
119
120TAILQ_HEAD(vrangelock_list, vrangelock);
121
122struct vrangehead {
123 struct vrangelock_list vh_list;
124};
125
126struct vrangelock {
127 TAILQ_ENTRY(vrangelock) vr_node;
128 int vr_flags;
129 off_t vr_offset;
130 off_t vr_length;
131};
132
133#define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */
134#define RNGL_CHECK 0x0002 /* check for work on unlock */
135#define RNGL_SHARED 0x0004 /* shared lock, else exclusive */
136#define RNGL_ONLIST 0x0008 /* sanity check */
137
138static __inline
139void
140vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length)
141{
142 vr->vr_flags = flags;
143 vr->vr_offset = offset;
144 vr->vr_length = length;
145}
146
147#ifdef _KERNEL
148
149void vrange_lock(struct vnode *vp, struct vrangelock *vr);
150void vrange_unlock(struct vnode *vp, struct vrangelock *vr);
151
152static __inline
153void
154vrange_lock_shared(struct vnode *vp, struct vrangelock *vr,
155 off_t offset, off_t length)
156{
157 vrange_init(vr, RNGL_SHARED, offset, length);
158 vrange_lock(vp, vr);
159}
160
161static __inline
162void
163vrange_lock_excl(struct vnode *vp, struct vrangelock *vr,
164 off_t offset, off_t length)
165{
166 vrange_init(vr, 0, offset, length);
167 vrange_lock(vp, vr);
168}
169
170#endif
0961aa92 171
984263bc 172/*
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173 * The vnode infrastructure is being reorgranized. Most reference-related
174 * fields are locked by the BGL, and most file I/O related operations and
175 * vnode teardown functions are locked by the vnode lock.
176 *
177 * File read operations require a shared lock, file write operations require
178 * an exclusive lock. Most directory operations (read or write) currently
179 * require an exclusive lock due to the side effects stored in the directory
180 * inode (which we intend to fix).
181 *
182 * File reads and writes are further protected by a range lock. The intention
183 * is to be able to break I/O operations down into more easily managed pieces
184 * so vm_page arrays can be passed through rather then UIOs. This work will
185 * occur in multiple stages. The range locks will also eventually be used to
186 * deal with clustered cache coherency issues and, more immediately, to
187 * protect operations associated with the kernel-managed journaling module.
e4c9c0c8 188 *
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189 * NOTE: Certain fields within the vnode structure requires v_token to be
190 * held. The vnode's normal lock need not be held when accessing
191 * these fields as long as the vnode is deterministically referenced
192 * (i.e. can't be ripped out from under the caller). This is typical
193 * for code paths based on descriptors or file pointers, but not for
194 * backdoor code paths that come in via the buffer cache.
6de32ba2 195 *
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196 * v_rbclean_tree
197 * v_rbdirty_tree
198 * v_rbhash_tree
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199 * v_pollinfo
200 *
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201 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
202 * typically points to &v_mount->mnt_vn_use_ops. We use a double
203 * pointer because mnt_vn_use_ops may change dynamically when e.g.
204 * journaling is turned on or off.
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205 *
206 * NOTE: v_filesize is currently only applicable when a VM object is
207 * associated with the vnode. Otherwise it will be set to NOOFFSET.
f63911bf 208 *
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209 * NOTE: The following fields require a spin or token lock. Note that
210 * additional subsystems may use v_token or v_spinlock for other
211 * purposes, e.g. vfs/fifofs/fifo_vnops.c
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212 *
213 * v_namecache v_spinlock
214 * v_rb* v_token
984263bc 215 */
6bae6177 216RB_HEAD(buf_rb_tree, buf);
1f1ea522 217RB_HEAD(buf_rb_hash, buf);
6bae6177 218
984263bc 219struct vnode {
6b008938 220 int v_flag; /* vnode flags (see below) */
81b5c339 221 int v_writecount;
e4c9c0c8 222 int v_opencount; /* number of explicit opens */
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223 int v_auxrefs; /* auxiliary references */
224 struct sysref v_sysref; /* normal references */
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225 struct bio_track v_track_read; /* track I/O's in progress */
226 struct bio_track v_track_write; /* track I/O's in progress */
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227 struct mount *v_mount; /* ptr to vfs we are in */
228 struct vop_ops **v_ops; /* vnode operations vector */
0e8bd897 229 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist/cachelist */
984263bc 230 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
6bae6177 231 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */
54df1108 232 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */
1f1ea522 233 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */
984263bc 234 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
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235 enum vtype v_type; /* vnode type */
236 union {
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237 struct socket *vu_socket; /* unix ipc (VSOCK) */
238 struct {
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239 int vu_umajor; /* device number for attach */
240 int vu_uminor;
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241 struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */
242 SLIST_ENTRY(vnode) vu_cdevnext;
243 } vu_cdev;
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244 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
245 } v_un;
57f7b636 246 off_t v_filesize; /* file EOF or NOOFFSET */
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247 off_t v_lazyw; /* lazy write iterator */
248 off_t v_lastw; /* last write (write cluster) */
249 off_t v_cstart; /* start block of cluster */
250 off_t v_lasta; /* last allocation */
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251 int v_clen; /* length of current cluster */
252 struct vm_object *v_object; /* Place to store VM object */
3446c007 253 struct lock v_lock; /* file/dir ops lock */
008b2675 254 struct lwkt_token v_token; /* (see above) */
984263bc 255 enum vtagtype v_tag; /* type of underlying data */
597aea93 256 void *v_data; /* private data for fs */
f63911bf 257 struct namecache_list v_namecache; /* (S) associated nc entries */
984263bc 258 struct {
5b22f1a7 259 struct kqinfo vpi_kqinfo; /* identity of poller(s) */
984263bc 260 } v_pollinfo;
29802dbb 261 struct vmresident *v_resident; /* optional vmresident */
6ddb7618 262 struct vrangehead v_range; /* range lock */
9bfc4d6d 263 struct ccms_dataspace v_ccms; /* cache coherency */
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264#ifdef DEBUG_LOCKS
265 const char *filename; /* Source file doing locking */
266 int line; /* Line number doing locking */
267#endif
5fd012e0 268 void *v_xaddr;
984263bc 269};
984263bc 270#define v_socket v_un.vu_socket
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271#define v_umajor v_un.vu_cdev.vu_umajor
272#define v_uminor v_un.vu_cdev.vu_uminor
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273#define v_rdev v_un.vu_cdev.vu_cdevinfo
274#define v_cdevnext v_un.vu_cdev.vu_cdevnext
984263bc 275#define v_fifoinfo v_un.vu_fifoinfo
9d265729 276#define v_spinlock v_lock.lk_spinlock
984263bc 277
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278/*
279 * Vnode flags.
280 */
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281#define VROOT 0x00000001 /* root of its file system */
282#define VTEXT 0x00000002 /* vnode is a pure text prototype */
283#define VSYSTEM 0x00000004 /* vnode being used by kernel */
284#define VISTTY 0x00000008 /* vnode represents a tty */
285#define VCTTYISOPEN 0x00000010 /* controlling terminal tty is open */
286#define VCKPT 0x00000020 /* checkpoint-restored vnode */
d98152a8 287/* open for business 0x00000040 */
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288#define VMAYHAVELOCKS 0x00000080 /* maybe posix or flock locks on vp */
289#define VPFSROOT 0x00000100 /* may be a pseudo filesystem root */
290/* open for business 0x00000200 */
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291#define VAGE0 0x00000400 /* Age count for recycling - 2 bits */
292#define VAGE1 0x00000800 /* Age count for recycling - 2 bits */
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293#define VCACHED 0x00001000 /* No active references but has cache value */
294#define VOBJBUF 0x00002000 /* Allocate buffers in VM object */
295#define VINACTIVE 0x00004000 /* The vnode is inactive (did VOP_INACTIVE) */
0e8bd897 296/* open for business 0x00008000 */
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297#define VOLOCK 0x00010000 /* vnode is locked waiting for an object */
298#define VOWANT 0x00020000 /* a process is waiting for VOLOCK */
299#define VRECLAIMED 0x00040000 /* This vnode has been destroyed */
300#define VFREE 0x00080000 /* This vnode is on the freelist */
c0885fab 301#define VNOTSEEKABLE 0x00100000 /* rd/wr ignores file offset */
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302#define VONWORKLST 0x00200000 /* On syncer work-list */
303#define VMOUNT 0x00400000 /* Mount in progress */
304#define VOBJDIRTY 0x00800000 /* object might be dirty */
e9b56058 305#define VSWAPCACHE 0x01000000 /* enable swapcache */
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306/* open for business 0x02000000 */
307/* open for business 0x04000000 */
2aff4871 308
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309/*
310 * vmntvnodescan() flags
311 */
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312#define VMSC_GETVP 0x01
313#define VMSC_GETVX 0x02
5fd012e0 314#define VMSC_NOWAIT 0x10
19b97e01 315#define VMSC_ONEPASS 0x20
5fd012e0 316
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317/*
318 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
319 * help with write clustering)
320 */
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321#define IO_UNIT 0x0001 /* do I/O as atomic unit */
322#define IO_APPEND 0x0002 /* append write to end */
323#define IO_SYNC 0x0004 /* do I/O synchronously */
324#define IO_NODELOCKED 0x0008 /* underlying node already locked */
325#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
326#define IO_VMIO 0x0020 /* data already in VMIO space */
327#define IO_INVAL 0x0040 /* invalidate after I/O */
328#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
597aea93 329#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
cb63d1bc 330#define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */
597aea93 331#define IO_CORE 0x0400 /* I/O is part of core dump */
638e2d2d 332#define IO_NRDELAY 0x8000 /* do not block on disk reads */
984263bc 333
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334#define IO_SEQMAX 0x7F /* seq heuristic max value */
335#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
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336
337/*
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338 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
339 * and SVTX flag bits.
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340 */
341#define VSUID 04000 /* set user id on execution */
342#define VSGID 02000 /* set group id on execution */
343#define VSVTX 01000 /* save swapped text even after use */
344#define VREAD 00400 /* read, write, execute permissions */
345#define VWRITE 00200
346#define VEXEC 00100
347
348/*
349 * Token indicating no attribute value yet assigned.
350 */
351#define VNOVAL (-1)
352
353/*
354 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
355 */
597aea93 356#define VLKTIMEOUT (hz / 20 + 1)
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357
358#ifdef _KERNEL
359
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360/*
361 * Convert between vnode types and inode formats (since POSIX.1
362 * defines mode word of stat structure in terms of inode formats).
363 */
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364extern enum vtype iftovt_tab[];
365extern int vttoif_tab[];
366#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
367#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
368#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
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369
370/*
371 * Flags to various vnode functions.
372 */
373#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
374#define FORCECLOSE 0x0002 /* vflush: force file closure */
375#define WRITECLOSE 0x0004 /* vflush: only close writable files */
376#define DOCLOSE 0x0008 /* vclean: close active files */
377#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
984263bc 378
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379#ifdef DIAGNOSTIC
380#define VATTR_NULL(vap) vattr_null(vap)
381#else
382#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
383#endif /* DIAGNOSTIC */
384
385#define NULLVP ((struct vnode *)NULL)
386
387#define VNODEOP_SET(f) \
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388 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
389 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
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390
391/*
392 * Global vnode data.
393 */
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394struct objcache;
395
984263bc 396extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
28623bf9 397extern struct nchandle rootnch; /* root (i.e. "/") namecache */
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398extern int desiredvnodes; /* number of vnodes desired */
399extern time_t syncdelay; /* max time to delay syncing data */
400extern time_t filedelay; /* time to delay syncing files */
401extern time_t dirdelay; /* time to delay syncing directories */
402extern time_t metadelay; /* time to delay syncing metadata */
70aac194 403extern struct objcache *namei_oc;
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404extern int prtactive; /* nonzero to call vprint() */
405extern struct vattr va_null; /* predefined null vattr structure */
406extern int vfs_ioopt;
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407extern int numvnodes;
408extern int freevnodes;
984263bc 409
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410/*
411 * Interlock for scanning list of vnodes attached to a mountpoint
412 */
8a8d5d85 413extern struct lwkt_token mntvnode_token;
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414
415/*
416 * This macro is very helpful in defining those offsets in the vdesc struct.
417 *
418 * This is stolen from X11R4. I ignored all the fancy stuff for
419 * Crays, so if you decide to port this to such a serious machine,
420 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
421 */
597aea93 422#define VOPARG_OFFSET(p_type,field) \
984263bc 423 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
597aea93 424#define VOPARG_OFFSETOF(s_type,field) \
984263bc 425 VOPARG_OFFSET(s_type*,field)
597aea93 426#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
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427 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
428
625ddaba 429typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
984263bc 430
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431/*
432 * VOCALL calls an op given an ops vector. We break it out because BSD's
433 * vclean changes the ops vector and then wants to call ops with the old
434 * vector.
435 */
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436
437typedef int (*vocall_func_t)(struct vop_generic_args *);
438
984263bc 439/*
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440 * This call executes the vops vector for the offset stored in the ap's
441 * descriptor of the passed vops rather then the one related to the
442 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
443 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
444 * vector function).
984263bc 445 */
0961aa92 446#define VOCALL(vops, ap) \
31bd717a 447 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
0961aa92 448
597aea93 449#define VDESC(OP) (& __CONCAT(OP,_desc))
984263bc 450
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451/*
452 * Public vnode manipulation functions.
453 */
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454struct file;
455struct mount;
fad57d0e 456struct nlookupdata;
984263bc 457struct proc;
dadab5e9 458struct thread;
984263bc 459struct stat;
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460struct ucred;
461struct uio;
462struct vattr;
463struct vnode;
984263bc 464
a8873631 465struct vnode *getsynthvnode(const char *devname);
0e9b9130 466void addaliasu (struct vnode *vp, int x, int y);
b13267a5 467int v_associate_rdev(struct vnode *vp, cdev_t dev);
e4c9c0c8 468void v_release_rdev(struct vnode *vp);
b13267a5 469int bdevvp (cdev_t dev, struct vnode **vpp);
5fd012e0 470struct vnode *allocvnode(int lktimeout, int lkflags);
3c37c940 471int freesomevnodes(int count);
6ddb7618 472int getnewvnode (enum vtagtype tag, struct mount *mp,
3446c007 473 struct vnode **vpp, int timo, int lkflags);
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474int getspecialvnode (enum vtagtype tag, struct mount *mp,
475 struct vop_ops **ops, struct vnode **vpp, int timo,
476 int lkflags);
b153f746 477int speedup_syncer (void);
3b0783db 478int vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *);
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479void vattr_null (struct vattr *vap);
480int vcount (struct vnode *vp);
b13267a5 481int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
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482void vfs_nadd_vnodeops_sysinit (void *);
483void vfs_nrm_vnodeops_sysinit (void *);
484void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
485void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
b153f746 486int vflush (struct mount *mp, int rootrefs, int flags);
5fd012e0 487int vmntvnodescan(struct mount *mp, int flags,
41a01a4d 488 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
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489 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
490 void *data);
491void insmntque(struct vnode *vp, struct mount *mp);
41a01a4d 492
3c37c940 493void vclean_vxlocked (struct vnode *vp, int flags);
cf683bae 494void vclean_unlocked (struct vnode *vp);
3c37c940 495void vgone_vxlocked (struct vnode *vp);
b8477cda 496int vrevoke (struct vnode *vp, struct ucred *cred);
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497int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
498int vtruncbuf (struct vnode *vp, off_t length, int blksize);
8452310f 499void vnode_pager_setsize (struct vnode *, vm_ooffset_t);
3bb7eedb 500int nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff);
8452310f 501int nvextendbuf(struct vnode *vp, off_t olength, off_t nlength,
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502 int oblksize, int nblksize,
503 int oboff, int nboff, int trivial);
504void nvnode_pager_setsize (struct vnode *vp, off_t length,
505 int blksize, int boff);
4e0ecc94 506int vfsync(struct vnode *vp, int waitfor, int passes,
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507 int (*checkdef)(struct buf *),
508 int (*waitoutput)(struct vnode *, struct thread *));
b0d18f7d 509int vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff);
b153f746 510void vprint (char *label, struct vnode *vp);
87de5057 511int vrecycle (struct vnode *vp);
2ec4b00d 512int vmaxiosize (struct vnode *vp);
81b5c339 513void vn_strategy(struct vnode *vp, struct bio *bio);
c504e38e 514int vn_cache_strategy(struct vnode *vp, struct bio *bio);
87de5057 515int vn_close (struct vnode *vp, int flags);
22a90887 516void vn_gone (struct vnode *vp);
b153f746 517int vn_isdisk (struct vnode *vp, int *errp);
ca466bae 518int vn_lock (struct vnode *vp, int flags);
a11aaa81 519int vn_islocked (struct vnode *vp);
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520int vn_islocked_unlock (struct vnode *vp);
521void vn_islocked_relock (struct vnode *vp, int vpls);
a11aaa81 522void vn_unlock (struct vnode *vp);
984263bc 523#ifdef DEBUG_LOCKS
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524int debug_vn_lock (struct vnode *vp, int flags,
525 const char *filename, int line);
526#define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__)
984263bc 527#endif
b310dfc4 528
5d72d6ed 529int vn_get_namelen(struct vnode *, int *);
fad57d0e 530void vn_setspecops (struct file *fp);
5b4cfb7e 531int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess);
fad57d0e 532int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
a8873631 533int vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
b153f746 534int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
984263bc 535 int len, off_t offset, enum uio_seg segflg, int ioflg,
87de5057 536 struct ucred *cred, int *aresid);
b153f746 537int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
984263bc 538 int len, off_t offset, enum uio_seg segflg, int ioflg,
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539 struct ucred *cred, int *aresid);
540int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
b13267a5 541cdev_t vn_todev (struct vnode *vp);
b153f746 542void vfs_timestamp (struct timespec *);
dad088a5 543size_t vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp);
349433c9 544void vn_mark_atime(struct vnode *vp, struct thread *td);
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545int vn_writechk (struct vnode *vp, struct nchandle *nch);
546int ncp_writechk(struct nchandle *nch);
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547int vop_stdopen (struct vop_open_args *ap);
548int vop_stdclose (struct vop_close_args *ap);
177403a9 549int vop_stdmountctl(struct vop_mountctl_args *ap);
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550int vop_stdgetpages(struct vop_getpages_args *ap);
551int vop_stdputpages(struct vop_putpages_args *ap);
349433c9 552int vop_stdmarkatime(struct vop_markatime_args *ap);
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553int vop_stdnoread(struct vop_read_args *ap);
554int vop_stdnowrite(struct vop_write_args *ap);
2d3e977e 555int vop_stdpathconf (struct vop_pathconf_args *ap);
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556int vop_eopnotsupp (struct vop_generic_args *ap);
557int vop_ebadf (struct vop_generic_args *ap);
558int vop_einval (struct vop_generic_args *ap);
559int vop_enotty (struct vop_generic_args *ap);
560int vop_defaultop (struct vop_generic_args *ap);
561int vop_null (struct vop_generic_args *ap);
562int vop_panic (struct vop_generic_args *ap);
fc46f680
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563int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
564 const char *);
b153f746 565
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566int vop_compat_nresolve(struct vop_nresolve_args *ap);
567int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
568int vop_compat_ncreate(struct vop_ncreate_args *ap);
569int vop_compat_nmkdir(struct vop_nmkdir_args *ap);
570int vop_compat_nmknod(struct vop_nmknod_args *ap);
571int vop_compat_nlink(struct vop_nlink_args *ap);
572int vop_compat_nsymlink(struct vop_nsymlink_args *ap);
573int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
574int vop_compat_nremove(struct vop_nremove_args *ap);
575int vop_compat_nrmdir(struct vop_nrmdir_args *ap);
576int vop_compat_nrename(struct vop_nrename_args *ap);
577
e3332475 578void vx_lock (struct vnode *vp);
5fd012e0 579void vx_unlock (struct vnode *vp);
e3332475 580void vx_get (struct vnode *vp);
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581int vx_get_nonblock (struct vnode *vp);
582void vx_put (struct vnode *vp);
87de5057 583int vget (struct vnode *vp, int lockflag);
597aea93 584void vput (struct vnode *vp);
5fd012e0 585void vhold (struct vnode *);
cf1bb2a8 586void vhold_interlocked (struct vnode *);
5fd012e0 587void vdrop (struct vnode *);
b153f746 588void vref (struct vnode *vp);
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589void vrele (struct vnode *vp);
590void vsetflags (struct vnode *vp, int flags);
591void vclrflags (struct vnode *vp, int flags);
592
593void vfs_subr_init(void);
594void vfs_mount_init(void);
595void vfs_lock_init(void);
596void vfs_sync_init(void);
aac0aabd 597void mount_init(struct mount *mp);
5fd012e0 598
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599void vn_syncer_add(struct vnode *, int);
600void vn_syncer_remove(struct vnode *);
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601void vnlru_proc_wait(void);
602
66a1ddf5 603extern struct vop_ops default_vnode_vops;
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604extern struct vop_ops dead_vnode_vops;
605
606extern struct vop_ops *default_vnode_vops_p;
66a1ddf5 607extern struct vop_ops *dead_vnode_vops_p;
984263bc 608
03d6a592 609#endif /* _KERNEL */
984263bc 610
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611#endif /* _KERNEL || _KERNEL_STRUCTURES */
612#endif /* !_SYS_VNODE_H_ */