bsd/sys/vnode.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1989, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)vnode.h     8.17 (Berkeley) 5/20/95
  59  */
  60
  61 #ifndef _VNODE_H_
  62 #define _VNODE_H_
  63
  64 #include <sys/appleapiopts.h>
  65 #include <sys/cdefs.h>
  66 #include <sys/queue.h>
  67 #include <sys/lock.h>
  68
  69 #include <sys/time.h>
  70 #include <sys/uio.h>
  71
  72 #include <sys/vm.h>
  73 #ifdef KERNEL
  74 #include <sys/systm.h>
  75 #include <vm/vm_pageout.h>
  76 #endif /* KERNEL */
  77
  78 #ifdef __APPLE_API_PRIVATE
  79 /*
  80  * The vnode is the focus of all file activity in UNIX.  There is a
  81  * unique vnode allocated for each active file, each current directory,
  82  * each mounted-on file, text file, and the root.
  83  */
  84
  85 /*
  86  * Vnode types.  VNON means no type.
  87  */
  88 enum vtype      { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD, VSTR,
  89                           VCPLX };
  90
  91 /*
  92  * Vnode tag types.
  93  * These are for the benefit of external programs only (e.g., pstat)
  94  * and should NEVER be inspected by the kernel.
  95  */
  96 enum vtagtype   {
  97         VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_MSDOSFS, VT_LFS, VT_LOFS, VT_FDESC,
  98         VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS,
  99         VT_UNION, VT_HFS, VT_VOLFS, VT_DEVFS, VT_WEBDAV, VT_UDF, VT_AFP,
 100         VT_CDDA, VT_CIFS,VT_OTHER};
 101
 102 /*
 103  * Each underlying filesystem allocates its own private area and hangs
 104  * it from v_data.  If non-null, this area is freed in getnewvnode().
 105  */
 106 LIST_HEAD(buflists, buf);
 107
 108 #define MAX_CLUSTERS 4  /* maximum number of vfs clusters per vnode */
 109
 110 struct v_cluster {
 111         unsigned int    start_pg;
 112         unsigned int    last_pg;
 113 };
 114
 115 struct v_padded_clusters {
 116         long    v_pad;
 117         struct v_cluster        v_c[MAX_CLUSTERS];
 118 };
 119
 120 /*
 121  * Reading or writing any of these items requires holding the appropriate lock.
 122  * v_freelist is locked by the global vnode_free_list simple lock.
 123  * v_mntvnodes is locked by the global mntvnodes simple lock.
 124  * v_flag, v_usecount, v_holdcount and v_writecount are
 125  * locked by the v_interlock simple lock.
 126  */
 127 struct vnode {
 128         u_long  v_flag;                         /* vnode flags (see below) */
 129         long    v_usecount;                     /* reference count of users */
 130         long    v_holdcnt;                      /* page & buffer references */
 131         daddr_t v_lastr;                        /* last read (read-ahead) */
 132         u_long  v_id;                           /* capability identifier */
 133         struct  mount *v_mount;                 /* ptr to vfs we are in */
 134         int     (**v_op)(void *);               /* vnode operations vector */
 135         TAILQ_ENTRY(vnode) v_freelist;          /* vnode freelist */
 136         LIST_ENTRY(vnode) v_mntvnodes;          /* vnodes for mount point */
 137         struct  buflists v_cleanblkhd;          /* clean blocklist head */
 138         struct  buflists v_dirtyblkhd;          /* dirty blocklist head */
 139         long    v_numoutput;                    /* num of writes in progress */
 140         enum    vtype v_type;                   /* vnode type */
 141         union {
 142                 struct mount    *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
 143                 struct socket   *vu_socket;     /* unix ipc (VSOCK) */
 144                 struct specinfo *vu_specinfo;   /* device (VCHR, VBLK) */
 145                 struct fifoinfo *vu_fifoinfo;   /* fifo (VFIFO) */
 146         } v_un;
 147         struct ubc_info *v_ubcinfo;     /* valid for (VREG) */
 148         struct  nqlease *v_lease;               /* Soft reference to lease */
 149         daddr_t v_lastw;                        /* last write (write cluster) */
 150         daddr_t v_cstart;                       /* start block of cluster */
 151         daddr_t v_ciosiz;                       /* real size of I/O for cluster */
 152         int     v_clen;                         /* length of current cluster */
 153         int     v_ralen;                        /* Read-ahead length */
 154         daddr_t v_maxra;                        /* last readahead block */
 155         union {
 156                 simple_lock_data_t v_ilk;       /* lock on usecount and flag */
 157                 struct v_padded_clusters v_cl;  /* vfs cluster IO */
 158         } v_un1;
 159 #define v_clusters v_un1.v_cl.v_c
 160 #define v_interlock v_un1.v_ilk
 161
 162         struct  lock__bsd__ *v_vnlock;          /* used for non-locking fs's */
 163         long    v_writecount;                   /* reference count of writers */
 164         enum    vtagtype v_tag;                 /* type of underlying data */
 165         void    *v_data;                        /* private data for fs */
 166 };
 167 #define v_mountedhere   v_un.vu_mountedhere
 168 #define v_socket        v_un.vu_socket
 169 #define v_specinfo      v_un.vu_specinfo
 170 #define v_fifoinfo      v_un.vu_fifoinfo
 171
 172 /*
 173  * Vnode flags.
 174  */
 175 #define VROOT           0x000001        /* root of its file system */
 176 #define VTEXT           0x000002        /* vnode is a pure text prototype */
 177 #define VSYSTEM         0x000004        /* vnode being used by kernel */
 178 #define VISTTY          0x000008        /* vnode represents a tty */
 179 #define VWASMAPPED      0x000010        /* vnode was mapped before */
 180 #define VTERMINATE      0x000020        /* terminating memory object */
 181 #define VTERMWANT       0x000040        /* wating for memory object death */
 182 #define VMOUNT          0x000080        /* mount operation in progress */
 183 #define VXLOCK          0x000100        /* vnode is locked to change underlying type */
 184 #define VXWANT          0x000200        /* process is waiting for vnode */
 185 #define VBWAIT          0x000400        /* waiting for output to complete */
 186 #define VALIASED        0x000800        /* vnode has an alias */
 187 #define VORECLAIM       0x001000        /* vm object is being reclaimed */
 188 #define VNOCACHE_DATA   0x002000        /* don't keep data cached once it's been consumed */
 189 #define VSTANDARD       0x004000        /* vnode obtained from common pool */
 190 #define VAGE            0x008000        /* Insert vnode at head of free list */
 191 #define VRAOFF          0x010000        /* read ahead disabled */
 192 #define VUINIT          0x020000        /* ubc_info being initialized */
 193 #define VUWANT          0x040000        /* process is wating for VUINIT */
 194 #define VUINACTIVE      0x080000        /* UBC vnode is on inactive list */
 195 #define VHASDIRTY       0x100000        /* UBC vnode may have 1 or more */
 196                 /* delayed dirty pages that need to be flushed at the next 'sync' */
 197 #define VSWAP           0x200000        /* vnode is being used as swapfile */
 198 #define VTHROTTLED      0x400000        /* writes or pageouts have been throttled */
 199                 /* wakeup tasks waiting when count falls below threshold */
 200 #define VNOFLUSH        0x800000        /* don't vflush() if SKIPSYSTEM */
 201
 202
 203 /*
 204  * Vnode attributes.  A field value of VNOVAL represents a field whose value
 205  * is unavailable (getattr) or which is not to be changed (setattr).
 206  */
 207 struct vattr {
 208         enum vtype      va_type;        /* vnode type (for create) */
 209         u_short         va_mode;        /* files access mode and type */
 210         short           va_nlink;       /* number of references to file */
 211         uid_t           va_uid;         /* owner user id */
 212         gid_t           va_gid;         /* owner group id */
 213         long            va_fsid;        /* file system id (dev for now) */
 214         long            va_fileid;      /* file id */
 215         u_quad_t        va_size;        /* file size in bytes */
 216         long            va_blocksize;   /* blocksize preferred for i/o */
 217         struct timespec va_atime;       /* time of last access */
 218         struct timespec va_mtime;       /* time of last modification */
 219         struct timespec va_ctime;       /* time file changed */
 220         u_long          va_gen;         /* generation number of file */
 221         u_long          va_flags;       /* flags defined for file */
 222         dev_t           va_rdev;        /* device the special file represents */
 223         u_quad_t        va_bytes;       /* bytes of disk space held by file */
 224         u_quad_t        va_filerev;     /* file modification number */
 225         u_int           va_vaflags;     /* operations flags, see below */
 226         long            va_spare;       /* remain quad aligned */
 227 };
 228
 229 /*
 230  * Flags for va_vaflags.
 231  */
 232 #define VA_UTIMES_NULL  0x01            /* utimes argument was NULL */
 233 #define VA_EXCLUSIVE    0x02            /* exclusive create request */
 234
 235 /*
 236  * Flags for ioflag.
 237  */
 238 #define IO_UNIT         0x01            /* do I/O as atomic unit */
 239 #define IO_APPEND       0x02            /* append write to end */
 240 #define IO_SYNC         0x04            /* do I/O synchronously */
 241 #define IO_NODELOCKED   0x08            /* underlying node already locked */
 242 #define IO_NDELAY       0x10            /* FNDELAY flag set in file table */
 243 #define IO_NOZEROFILL   0x20            /* F_SETSIZE fcntl uses to prevent zero filling */
 244 #define IO_TAILZEROFILL 0x40            /* zero fills at the tail of write */
 245 #define IO_HEADZEROFILL 0x80            /* zero fills at the head of write */
 246 #define IO_NOZEROVALID  0x100           /* do not zero fill if valid page */
 247 #define IO_NOZERODIRTY  0x200           /* do not zero fill if page is dirty */
 248
 249 /*
 250  *  Modes.  Some values same as Ixxx entries from inode.h for now.
 251  */
 252 #define VSUID   04000           /* set user id on execution */
 253 #define VSGID   02000           /* set group id on execution */
 254 #define VSVTX   01000           /* save swapped text even after use */
 255 #define VREAD   00400           /* read, write, execute permissions */
 256 #define VWRITE  00200
 257 #define VEXEC   00100
 258
 259 /*
 260  * Token indicating no attribute value yet assigned.
 261  */
 262 #define VNOVAL  (-1)
 263
 264 #ifdef KERNEL
 265 /*
 266  * Convert between vnode types and inode formats (since POSIX.1
 267  * defines mode word of stat structure in terms of inode formats).
 268  */
 269 extern enum vtype       iftovt_tab[];
 270 extern int              vttoif_tab[];
 271 #define IFTOVT(mode)    (iftovt_tab[((mode) & S_IFMT) >> 12])
 272 #define VTTOIF(indx)    (vttoif_tab[(int)(indx)])
 273 #define MAKEIMODE(indx, mode)   (int)(VTTOIF(indx) | (mode))
 274
 275 /*
 276  * Flags to various vnode functions.
 277  */
 278 #define SKIPSYSTEM      0x0001          /* vflush: skip vnodes marked VSYSTEM */
 279 #define FORCECLOSE      0x0002          /* vflush: force file closeure */
 280 #define WRITECLOSE      0x0004          /* vflush: only close writeable files */
 281 #define SKIPSWAP        0x0008          /* vflush: skip vnodes marked VSWAP */
 282
 283 #define DOCLOSE         0x0008          /* vclean: close active files */
 284
 285 #define V_SAVE          0x0001          /* vinvalbuf: sync file first */
 286 #define V_SAVEMETA      0x0002          /* vinvalbuf: leave indirect blocks */
 287
 288 #define REVOKEALL       0x0001          /* vop_revoke: revoke all aliases */
 289
 290 /* flags for vop_allocate */
 291 #define PREALLOCATE             0x00000001      /* preallocate allocation blocks */
 292 #define ALLOCATECONTIG  0x00000002      /* allocate contigious space */
 293 #define ALLOCATEALL             0x00000004      /* allocate all requested space */
 294                                                                         /* or no space at all */
 295 #define FREEREMAINDER   0x00000008      /* deallocate allocated but */
 296                                                                         /* unfilled blocks */
 297 #define ALLOCATEFROMPEOF        0x00000010      /* allocate from the physical eof */
 298 #define ALLOCATEFROMVOL         0x00000020      /* allocate from the volume offset */
 299
 300 #if DIAGNOSTIC
 301 #define VATTR_NULL(vap) vattr_null(vap)
 302 #define HOLDRELE(vp)    holdrele(vp)
 303 #define VHOLD(vp)       vhold(vp)
 304
 305 void    holdrele __P((struct vnode *));
 306 void    vattr_null __P((struct vattr *));
 307 void    vhold __P((struct vnode *));
 308 #else
 309 #define VATTR_NULL(vap) (*(vap) = va_null)      /* initialize a vattr */
 310 #define HOLDRELE(vp)    holdrele(vp)            /* decrease buf or page ref */
 311 extern __inline void holdrele(struct vnode *vp)
 312 {
 313         simple_lock(&vp->v_interlock);
 314         vp->v_holdcnt--;
 315         simple_unlock(&vp->v_interlock);
 316 }
 317 #define VHOLD(vp)       vhold(vp)               /* increase buf or page ref */
 318 extern __inline void vhold(struct vnode *vp)
 319 {
 320         simple_lock(&vp->v_interlock);
 321         if (++vp->v_holdcnt <= 0)
 322                 panic("vhold: v_holdcnt");
 323         simple_unlock(&vp->v_interlock);
 324 }
 325 #endif /* DIAGNOSTIC */
 326
 327 #define VREF(vp)        vref(vp)
 328 void    vref __P((struct vnode *));
 329 #define NULLVP  ((struct vnode *)NULL)
 330
 331 /*
 332  * Global vnode data.
 333  */
 334 extern  struct vnode *rootvnode;        /* root (i.e. "/") vnode */
 335 extern  int desiredvnodes;              /* number of vnodes desired */
 336 extern  struct vattr va_null;           /* predefined null vattr structure */
 337
 338 /*
 339  * Macro/function to check for client cache inconsistency w.r.t. leasing.
 340  */
 341 #define LEASE_READ      0x1             /* Check lease for readers */
 342 #define LEASE_WRITE     0x2             /* Check lease for modifiers */
 343 #endif /* KERNEL */
 344
 345 /*
 346  * Mods for exensibility.
 347  */
 348
 349 /*
 350  * Flags for vdesc_flags:
 351  */
 352 #define VDESC_MAX_VPS           16
 353 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
 354 #define VDESC_VP0_WILLRELE      0x0001
 355 #define VDESC_VP1_WILLRELE      0x0002
 356 #define VDESC_VP2_WILLRELE      0x0004
 357 #define VDESC_VP3_WILLRELE      0x0008
 358 #define VDESC_NOMAP_VPP         0x0100
 359 #define VDESC_VPP_WILLRELE      0x0200
 360
 361 /*
 362  * VDESC_NO_OFFSET is used to identify the end of the offset list
 363  * and in places where no such field exists.
 364  */
 365 #define VDESC_NO_OFFSET -1
 366
 367 /*
 368  * This structure describes the vnode operation taking place.
 369  */
 370 struct vnodeop_desc {
 371         int     vdesc_offset;           /* offset in vector--first for speed */
 372         char    *vdesc_name;            /* a readable name for debugging */
 373         int     vdesc_flags;            /* VDESC_* flags */
 374
 375         /*
 376          * These ops are used by bypass routines to map and locate arguments.
 377          * Creds and procs are not needed in bypass routines, but sometimes
 378          * they are useful to (for example) transport layers.
 379          * Nameidata is useful because it has a cred in it.
 380          */
 381         int     *vdesc_vp_offsets;      /* list ended by VDESC_NO_OFFSET */
 382         int     vdesc_vpp_offset;       /* return vpp location */
 383         int     vdesc_cred_offset;      /* cred location, if any */
 384         int     vdesc_proc_offset;      /* proc location, if any */
 385         int     vdesc_componentname_offset; /* if any */
 386         /*
 387          * Finally, we've got a list of private data (about each operation)
 388          * for each transport layer.  (Support to manage this list is not
 389          * yet part of BSD.)
 390          */
 391         caddr_t *vdesc_transports;
 392 };
 393
 394 #endif /* __APPLE_API_PRIVATE */
 395
 396 #ifdef KERNEL
 397
 398 #ifdef __APPLE_API_PRIVATE
 399 /*
 400  * A list of all the operation descs.
 401  */
 402 extern struct vnodeop_desc *vnodeop_descs[];
 403
 404 /*
 405  * Interlock for scanning list of vnodes attached to a mountpoint
 406  */
 407 extern struct slock mntvnode_slock;
 408
 409 /*
 410  * This macro is very helpful in defining those offsets in the vdesc struct.
 411  *
 412  * This is stolen from X11R4.  I ingored all the fancy stuff for
 413  * Crays, so if you decide to port this to such a serious machine,
 414  * you might want to consult Intrisics.h's XtOffset{,Of,To}.
 415  */
 416 #define VOPARG_OFFSET(p_type,field) \
 417         ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
 418 #define VOPARG_OFFSETOF(s_type,field) \
 419         VOPARG_OFFSET(s_type*,field)
 420 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
 421         ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
 422
 423
 424 /*
 425  * This structure is used to configure the new vnodeops vector.
 426  */
 427 struct vnodeopv_entry_desc {
 428         struct vnodeop_desc *opve_op;   /* which operation this is */
 429         int (*opve_impl)(void *);               /* code implementing this operation */
 430 };
 431 struct vnodeopv_desc {
 432                         /* ptr to the ptr to the vector where op should go */
 433         int (***opv_desc_vector_p)(void *);
 434         struct vnodeopv_entry_desc *opv_desc_ops;   /* null terminated list */
 435 };
 436
 437 /*
 438  * A default routine which just returns an error.
 439  */
 440 int vn_default_error __P((void));
 441
 442 /*
 443  * A generic structure.
 444  * This can be used by bypass routines to identify generic arguments.
 445  */
 446 struct vop_generic_args {
 447         struct vnodeop_desc *a_desc;
 448         /* other random data follows, presumably */
 449 };
 450
 451 /*
 452  * VOCALL calls an op given an ops vector.  We break it out because BSD's
 453  * vclean changes the ops vector and then wants to call ops with the old
 454  * vector.
 455  */
 456 #define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
 457
 458 /*
 459  * This call works for vnodes in the kernel.
 460  */
 461 #define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
 462 #define VDESC(OP) (& __CONCAT(OP,_desc))
 463 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
 464
 465 #endif /* __APPLE_API_PRIVATE */
 466
 467 /*
 468  * Finally, include the default set of vnode operations.
 469  */
 470 #include <sys/vnode_if.h>
 471
 472 /*
 473  * vnode manipulation functions.
 474  */
 475 struct file;
 476 struct mount;
 477 struct nameidata;
 478 struct ostat;
 479 struct proc;
 480 struct stat;
 481 struct ucred;
 482 struct uio;
 483 struct vattr;
 484 struct vnode;
 485 struct vop_bwrite_args;
 486
 487 #ifdef __APPLE_API_EVOLVING
 488 int     bdevvp __P((dev_t dev, struct vnode **vpp));
 489 void    cvtstat __P((struct stat *st, struct ostat *ost));
 490 int     getnewvnode __P((enum vtagtype tag,
 491             struct mount *mp, int (**vops)(void *), struct vnode **vpp));
 492 void    insmntque __P((struct vnode *vp, struct mount *mp));
 493 void    vattr_null __P((struct vattr *vap));
 494 int     vcount __P((struct vnode *vp));
 495 int     vflush __P((struct mount *mp, struct vnode *skipvp, int flags));
 496 int     vget __P((struct vnode *vp, int lockflag, struct proc *p));
 497 void    vgone __P((struct vnode *vp));
 498 int     vinvalbuf __P((struct vnode *vp, int save, struct ucred *cred,
 499             struct proc *p, int slpflag, int slptimeo));
 500 void    vprint __P((char *label, struct vnode *vp));
 501 int     vrecycle __P((struct vnode *vp, struct slock *inter_lkp,
 502             struct proc *p));
 503 int     vn_bwrite __P((struct vop_bwrite_args *ap));
 504 int     vn_close __P((struct vnode *vp,
 505             int flags, struct ucred *cred, struct proc *p));
 506 int     vn_lock __P((struct vnode *vp, int flags, struct proc *p));
 507 int     vn_open __P((struct nameidata *ndp, int fmode, int cmode));
 508 int     vn_rdwr __P((enum uio_rw rw, struct vnode *vp, caddr_t base,
 509             int len, off_t offset, enum uio_seg segflg, int ioflg,
 510             struct ucred *cred, int *aresid, struct proc *p));
 511 int     vn_stat __P((struct vnode *vp, struct stat *sb, struct proc *p));
 512 int     vop_noislocked __P((struct vop_islocked_args *));
 513 int     vop_nolock __P((struct vop_lock_args *));
 514 int     vop_nounlock __P((struct vop_unlock_args *));
 515 int     vop_revoke __P((struct vop_revoke_args *));
 516 struct vnode *
 517         checkalias __P((struct vnode *vp, dev_t nvp_rdev, struct mount *mp));
 518 void    vput __P((struct vnode *vp));
 519 void    vrele __P((struct vnode *vp));
 520 int     vaccess __P((mode_t file_mode, uid_t uid, gid_t gid,
 521             mode_t acc_mode, struct ucred *cred));
 522 int     getvnode __P((struct proc *p, int fd, struct file **fpp));
 523 #endif __APPLE_API_EVOLVING
 524
 525 #endif /* KERNEL */
 526
 527 #endif /* !_VNODE_H_ */