sys/sys/vnode.h

   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 $
  35  * $DragonFly: src/sys/sys/vnode.h,v 1.82 2008/07/12 01:09:45 dillon Exp $
  36  */
  37
  38 #ifndef _SYS_VNODE_H_
  39 #define _SYS_VNODE_H_
  40
  41 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  42
  43 #ifndef _SYS_QUEUE_H_
  44 #include <sys/queue.h>
  45 #endif
  46 #ifndef _SYS_LOCK_H_
  47 #include <sys/lock.h>
  48 #endif
  49 #ifndef _SYS_SELINFO_H_
  50 #include <sys/selinfo.h>
  51 #endif
  52 #ifndef _SYS_BIOTRACK_H_
  53 #include <sys/biotrack.h>
  54 #endif
  55 #ifndef _SYS_UIO_H_
  56 #include <sys/uio.h>
  57 #endif
  58 #ifndef _SYS_ACL_H_
  59 #include <sys/acl.h>
  60 #endif
  61 #ifndef _SYS_NAMECACHE_H_
  62 #include <sys/namecache.h>
  63 #endif
  64 #ifndef _SYS_THREAD_H_
  65 #include <sys/thread.h>
  66 #endif
  67 #ifndef _SYS_VFSOPS_H_
  68 #include <sys/vfsops.h>
  69 #endif
  70 #ifndef _SYS_VFSCACHE_H_
  71 #include <sys/vfscache.h>
  72 #endif
  73 #ifndef _SYS_TREE_H_
  74 #include <sys/tree.h>
  75 #endif
  76 #ifndef _SYS_SYSLINK_RPC_H_
  77 #include <sys/syslink_rpc.h>
  78 #endif
  79 #ifndef _SYS_SYSREF_H_
  80 #include <sys/sysref.h>
  81 #endif
  82 #ifndef _SYS_CCMS_H_
  83 #include <sys/ccms.h>
  84 #endif
  85 #ifndef _MACHINE_LOCK_H_
  86 #include <machine/lock.h>
  87 #endif
  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 /*
  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  */
  99 TAILQ_HEAD(buflists, buf);
 100
 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  */
 110 struct vrangelock;
 111
 112 TAILQ_HEAD(vrangelock_list, vrangelock);
 113
 114 struct vrangehead {
 115         struct vrangelock_list  vh_list;
 116 };
 117
 118 struct 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
 130 static __inline
 131 void
 132 vrange_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
 141 void    vrange_lock(struct vnode *vp, struct vrangelock *vr);
 142 void    vrange_unlock(struct vnode *vp, struct vrangelock *vr);
 143
 144 static __inline
 145 void
 146 vrange_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
 153 static __inline
 154 void
 155 vrange_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
 163
 164 /*
 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.
 180  *
 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.
 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.
 188  */
 189 RB_HEAD(buf_rb_tree, buf);
 190 RB_HEAD(buf_rb_hash, buf);
 191
 192 struct vnode {
 193         int     v_flag;                         /* vnode flags (see below) */
 194         int     v_writecount;
 195         int     v_opencount;                    /* number of explicit opens */
 196         int     v_auxrefs;                      /* auxiliary references */
 197         struct sysref v_sysref;                 /* normal references */
 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 */
 200         struct mount *v_mount;                  /* ptr to vfs we are in */
 201         struct vop_ops **v_ops;                 /* vnode operations vector */
 202         TAILQ_ENTRY(vnode) v_freelist;          /* vnode freelist */
 203         TAILQ_ENTRY(vnode) v_nmntvnodes;        /* vnodes for mount point */
 204         struct buf_rb_tree v_rbclean_tree;      /* RB tree of clean bufs */
 205         struct buf_rb_tree v_rbdirty_tree;      /* RB tree of dirty bufs */
 206         struct buf_rb_hash v_rbhash_tree;       /* RB tree general lookup */
 207         LIST_ENTRY(vnode) v_synclist;           /* vnodes with dirty buffers */
 208         enum    vtype v_type;                   /* vnode type */
 209         union {
 210                 struct socket   *vu_socket;     /* unix ipc (VSOCK) */
 211                 struct {
 212                         int     vu_umajor;      /* device number for attach */
 213                         int     vu_uminor;
 214                         struct cdev     *vu_cdevinfo; /* device (VCHR, VBLK) */
 215                         SLIST_ENTRY(vnode) vu_cdevnext;
 216                 } vu_cdev;
 217                 struct fifoinfo *vu_fifoinfo;   /* fifo (VFIFO) */
 218         } v_un;
 219         off_t   v_filesize;                     /* file EOF or NOOFFSET */
 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 */
 224         int     v_clen;                         /* length of current cluster */
 225         struct vm_object *v_object;             /* Place to store VM object */
 226         struct  lock v_lock;                    /* file/dir ops lock */
 227         enum    vtagtype v_tag;                 /* type of underlying data */
 228         void    *v_data;                        /* private data for fs */
 229         struct namecache_list v_namecache;      /* associated nc entries */
 230         struct  {
 231                 struct  lwkt_token vpi_token;   /* lock to protect below */
 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;
 236         struct vmresident *v_resident;          /* optional vmresident */
 237         struct vrangehead v_range;              /* range lock */
 238         struct ccms_dataspace v_ccms;           /* cache coherency */
 239 #ifdef  DEBUG_LOCKS
 240         const char *filename;                   /* Source file doing locking */
 241         int line;                               /* Line number doing locking */
 242 #endif
 243         void    *v_xaddr;
 244 };
 245 #define v_socket        v_un.vu_socket
 246 #define v_umajor        v_un.vu_cdev.vu_umajor
 247 #define v_uminor        v_un.vu_cdev.vu_uminor
 248 #define v_rdev          v_un.vu_cdev.vu_cdevinfo
 249 #define v_cdevnext      v_un.vu_cdev.vu_cdevnext
 250 #define v_fifoinfo      v_un.vu_fifoinfo
 251 #define v_spinlock      v_lock.lk_spinlock
 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 */
 266 #define VCTTYISOPEN     0x00010 /* controlling terminal tty is open */
 267 #define VCKPT           0x00020 /* checkpoint-restored vnode */
 268 #define VFSMID          0x00040 /* request FSMID update */
 269 #define VMAYHAVELOCKS   0x00080 /* there may be posix or flock locks on vp */
 270 /* open for business    0x00100 */
 271 /* open for business    0x00200 */
 272 /* open for business    0x00400 */
 273 /* open for business    0x00800 */
 274 #define VCACHED         0x01000 /* No active references but has cache value */
 275 #define VOBJBUF         0x02000 /* Allocate buffers in VM object */
 276 #define VINACTIVE       0x04000 /* The vnode is inactive (did VOP_INACTIVE) */
 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 */
 280 #define VRECLAIMED      0x40000 /* This vnode has been destroyed */
 281 #define VFREE           0x80000 /* This vnode is on the freelist */
 282 /* open for business    0x100000 */
 283 #define VONWORKLST      0x200000 /* On syncer work-list */
 284 #define VMOUNT          0x400000 /* Mount in progress */
 285 #define VOBJDIRTY       0x800000 /* object might be dirty */
 286
 287 /*
 288  * vmntvnodescan() flags
 289  */
 290 #define VMSC_GETVP      0x01
 291 #define VMSC_GETVX      0x02
 292 #define VMSC_NOWAIT     0x10
 293 #define VMSC_ONEPASS    0x20
 294
 295 /*
 296  * Flags for ioflag. (high 16 bits used to ask for read-ahead and
 297  * help with write clustering)
 298  */
 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 */
 307 #define IO_DIRECT       0x0100          /* attempt to bypass buffer cache */
 308 #define IO_UNUSED0200   0x0200
 309 #define IO_CORE         0x0400          /* I/O is part of core dump */
 310
 311 #define IO_SEQMAX       0x7F            /* seq heuristic max value */
 312 #define IO_SEQSHIFT     16              /* seq heuristic in upper 16 bits */
 313
 314 /*
 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.
 319  */
 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
 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  */
 339 #define VLKTIMEOUT     (hz / 20 + 1)
 340
 341 #ifdef _KERNEL
 342
 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  */
 347 extern  enum vtype      iftovt_tab[];
 348 extern  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))
 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
 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) \
 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);
 374
 375 /*
 376  * Global vnode data.
 377  */
 378 struct objcache;
 379
 380 extern  struct vnode *rootvnode;        /* root (i.e. "/") vnode */
 381 extern  struct nchandle rootnch;        /* root (i.e. "/") namecache */
 382 extern  int desiredvnodes;              /* number of vnodes desired */
 383 extern  time_t syncdelay;               /* max time to delay syncing data */
 384 extern  time_t filedelay;               /* time to delay syncing files */
 385 extern  time_t dirdelay;                /* time to delay syncing directories */
 386 extern  time_t metadelay;               /* time to delay syncing metadata */
 387 extern  struct objcache *namei_oc;
 388 extern  int prtactive;                  /* nonzero to call vprint() */
 389 extern  struct vattr va_null;           /* predefined null vattr structure */
 390 extern  int vfs_ioopt;
 391 extern  int numvnodes;
 392 extern  int freevnodes;
 393 extern  int vfs_fastdev;                /* fast specfs device access */
 394
 395 /*
 396  * Interlock for scanning list of vnodes attached to a mountpoint
 397  */
 398 extern struct lwkt_token mntvnode_token;
 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  */
 407 #define VOPARG_OFFSET(p_type,field) \
 408         ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
 409 #define VOPARG_OFFSETOF(s_type,field) \
 410         VOPARG_OFFSET(s_type*,field)
 411 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
 412         ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
 413
 414 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
 415
 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  */
 421
 422 typedef int (*vocall_func_t)(struct vop_generic_args *);
 423
 424 /*
 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).
 430  */
 431 #define VOCALL(vops, ap)                \
 432         (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
 433
 434 #define VDESC(OP) (& __CONCAT(OP,_desc))
 435
 436 /*
 437  * Public vnode manipulation functions.
 438  */
 439 struct file;
 440 struct mount;
 441 struct nlookupdata;
 442 struct proc;
 443 struct thread;
 444 struct stat;
 445 struct ucred;
 446 struct uio;
 447 struct vattr;
 448 struct vnode;
 449
 450 struct vnode *getsynthvnode(const char *devname);
 451 void    addaliasu (struct vnode *vp, int x, int y);
 452 int     v_associate_rdev(struct vnode *vp, cdev_t dev);
 453 void    v_release_rdev(struct vnode *vp);
 454 int     bdevvp (cdev_t dev, struct vnode **vpp);
 455 struct vnode *allocvnode(int lktimeout, int lkflags);
 456 int     freesomevnodes(int count);
 457 int     getnewvnode (enum vtagtype tag, struct mount *mp,
 458                     struct vnode **vpp, int timo, int lkflags);
 459 int     getspecialvnode (enum vtagtype tag, struct mount *mp,
 460                     struct vop_ops **ops, struct vnode **vpp, int timo,
 461                     int lkflags);
 462 int     spec_vnoperate (struct vop_generic_args *);
 463 int     speedup_syncer (void);
 464 void    vattr_null (struct vattr *vap);
 465 int     vcount (struct vnode *vp);
 466 int     vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
 467 void    vfs_nadd_vnodeops_sysinit (void *);
 468 void    vfs_nrm_vnodeops_sysinit (void *);
 469 void    vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
 470 void    vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
 471 int     vflush (struct mount *mp, int rootrefs, int flags);
 472 int     vmntvnodescan(struct mount *mp, int flags,
 473             int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
 474             int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
 475             void *data);
 476 void    insmntque(struct vnode *vp, struct mount *mp);
 477
 478 void    vclean_vxlocked (struct vnode *vp, int flags);
 479 void    vclean_unlocked (struct vnode *vp);
 480 void    vgone_vxlocked (struct vnode *vp);
 481 void    vupdatefsmid (struct vnode *vp);
 482 int     vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
 483 int     vtruncbuf (struct vnode *vp, off_t length, int blksize);
 484 int     vfsync(struct vnode *vp, int waitfor, int passes,
 485                 int (*checkdef)(struct buf *),
 486                 int (*waitoutput)(struct vnode *, struct thread *));
 487 int     vinitvmio(struct vnode *vp, off_t filesize);
 488 void    vprint (char *label, struct vnode *vp);
 489 int     vrecycle (struct vnode *vp);
 490 int     vmaxiosize (struct vnode *vp);
 491 void    vn_strategy(struct vnode *vp, struct bio *bio);
 492 int     vn_close (struct vnode *vp, int flags);
 493 int     vn_isdisk (struct vnode *vp, int *errp);
 494 int     vn_lock (struct vnode *vp, int flags);
 495 int     vn_islocked (struct vnode *vp);
 496 void    vn_unlock (struct vnode *vp);
 497 #ifdef  DEBUG_LOCKS
 498 int     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__)
 501 #endif
 502
 503 int     vn_get_namelen(struct vnode *, int *);
 504 void    vn_setspecops (struct file *fp);
 505 int     vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
 506 int     vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
 507 int     vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
 508 void    vn_pollevent (struct vnode *vp, int events);
 509 void    vn_pollgone (struct vnode *vp);
 510 int     vn_pollrecord (struct vnode *vp, int events);
 511 int     vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
 512             int len, off_t offset, enum uio_seg segflg, int ioflg,
 513             struct ucred *cred, int *aresid);
 514 int     vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
 515             int len, off_t offset, enum uio_seg segflg, int ioflg,
 516             struct ucred *cred, int *aresid);
 517 int     vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
 518 cdev_t  vn_todev (struct vnode *vp);
 519 void    vfs_timestamp (struct timespec *);
 520 int     vn_writechk (struct vnode *vp, struct nchandle *nch);
 521 int     ncp_writechk(struct nchandle *nch);
 522 int     vop_stdopen (struct vop_open_args *ap);
 523 int     vop_stdclose (struct vop_close_args *ap);
 524 int     vop_stdgetpages(struct vop_getpages_args *ap);
 525 int     vop_stdputpages(struct vop_putpages_args *ap);
 526 int     vop_nopoll (struct vop_poll_args *ap);
 527 int     vop_stdpathconf (struct vop_pathconf_args *ap);
 528 int     vop_stdpoll (struct vop_poll_args *ap);
 529 int     vop_stdrevoke (struct vop_revoke_args *ap);
 530 int     vop_eopnotsupp (struct vop_generic_args *ap);
 531 int     vop_ebadf (struct vop_generic_args *ap);
 532 int     vop_einval (struct vop_generic_args *ap);
 533 int     vop_enotty (struct vop_generic_args *ap);
 534 int     vop_defaultop (struct vop_generic_args *ap);
 535 int     vop_null (struct vop_generic_args *ap);
 536 int     vop_panic (struct vop_generic_args *ap);
 537 int     vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
 538                          const char *);
 539
 540 int     vop_compat_nresolve(struct vop_nresolve_args *ap);
 541 int     vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
 542 int     vop_compat_ncreate(struct vop_ncreate_args *ap);
 543 int     vop_compat_nmkdir(struct vop_nmkdir_args *ap);
 544 int     vop_compat_nmknod(struct vop_nmknod_args *ap);
 545 int     vop_compat_nlink(struct vop_nlink_args *ap);
 546 int     vop_compat_nsymlink(struct vop_nsymlink_args *ap);
 547 int     vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
 548 int     vop_compat_nremove(struct vop_nremove_args *ap);
 549 int     vop_compat_nrmdir(struct vop_nrmdir_args *ap);
 550 int     vop_compat_nrename(struct vop_nrename_args *ap);
 551
 552 void    vx_lock (struct vnode *vp);
 553 void    vx_unlock (struct vnode *vp);
 554 void    vx_get (struct vnode *vp);
 555 int     vx_get_nonblock (struct vnode *vp);
 556 void    vx_put (struct vnode *vp);
 557 int     vget (struct vnode *vp, int lockflag);
 558 void    vput (struct vnode *vp);
 559 void    vhold (struct vnode *);
 560 void    vdrop (struct vnode *);
 561 void    vref (struct vnode *vp);
 562 void    vrele (struct vnode *vp);
 563 void    vsetflags (struct vnode *vp, int flags);
 564 void    vclrflags (struct vnode *vp, int flags);
 565
 566 void    vfs_subr_init(void);
 567 void    vfs_mount_init(void);
 568 void    vfs_lock_init(void);
 569 void    vfs_sync_init(void);
 570
 571 void    vn_syncer_add_to_worklist(struct vnode *, int);
 572 void    vnlru_proc_wait(void);
 573
 574 extern  struct vop_ops default_vnode_vops;
 575 extern  struct vop_ops spec_vnode_vops;
 576 extern  struct vop_ops dead_vnode_vops;
 577
 578 extern  struct vop_ops *default_vnode_vops_p;
 579 extern  struct vop_ops *spec_vnode_vops_p;
 580 extern  struct vop_ops *dead_vnode_vops_p;
 581
 582 #endif  /* _KERNEL */
 583
 584 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
 585 #endif  /* !_SYS_VNODE_H_ */