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 1.83 2008/09/17 21:44:19 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  * Struct for mount options to printable formats.
 103  */
 104 struct mountctl_opt {
 105         int             o_opt;
 106         const char      *o_name;
 107 };
 108
 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  */
 118 struct vrangelock;
 119
 120 TAILQ_HEAD(vrangelock_list, vrangelock);
 121
 122 struct vrangehead {
 123         struct vrangelock_list  vh_list;
 124 };
 125
 126 struct 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
 138 static __inline
 139 void
 140 vrange_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
 149 void    vrange_lock(struct vnode *vp, struct vrangelock *vr);
 150 void    vrange_unlock(struct vnode *vp, struct vrangelock *vr);
 151
 152 static __inline
 153 void
 154 vrange_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
 161 static __inline
 162 void
 163 vrange_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
 171
 172 /*
 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.
 188  *
 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.
 195  *
 196  *      v_rbclean_tree
 197  *      v_rbdirty_tree
 198  *      v_rbhash_tree
 199  *      v_pollinfo
 200  *
 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.
 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.
 208  *
 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
 212  *
 213  *       v_namecache    v_spinlock
 214  *       v_rb*          v_token
 215  */
 216 RB_HEAD(buf_rb_tree, buf);
 217 RB_HEAD(buf_rb_hash, buf);
 218
 219 struct vnode {
 220         int     v_flag;                         /* vnode flags (see below) */
 221         int     v_writecount;
 222         int     v_opencount;                    /* number of explicit opens */
 223         int     v_auxrefs;                      /* auxiliary references */
 224         struct sysref v_sysref;                 /* normal references */
 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 */
 227         struct mount *v_mount;                  /* ptr to vfs we are in */
 228         struct vop_ops **v_ops;                 /* vnode operations vector */
 229         TAILQ_ENTRY(vnode) v_freelist;          /* vnode freelist/cachelist */
 230         TAILQ_ENTRY(vnode) v_nmntvnodes;        /* vnodes for mount point */
 231         struct buf_rb_tree v_rbclean_tree;      /* RB tree of clean bufs */
 232         struct buf_rb_tree v_rbdirty_tree;      /* RB tree of dirty bufs */
 233         struct buf_rb_hash v_rbhash_tree;       /* RB tree general lookup */
 234         LIST_ENTRY(vnode) v_synclist;           /* vnodes with dirty buffers */
 235         enum    vtype v_type;                   /* vnode type */
 236         union {
 237                 struct socket   *vu_socket;     /* unix ipc (VSOCK) */
 238                 struct {
 239                         int     vu_umajor;      /* device number for attach */
 240                         int     vu_uminor;
 241                         struct cdev     *vu_cdevinfo; /* device (VCHR, VBLK) */
 242                         SLIST_ENTRY(vnode) vu_cdevnext;
 243                 } vu_cdev;
 244                 struct fifoinfo *vu_fifoinfo;   /* fifo (VFIFO) */
 245         } v_un;
 246         off_t   v_filesize;                     /* file EOF or NOOFFSET */
 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 */
 251         int     v_clen;                         /* length of current cluster */
 252         struct vm_object *v_object;             /* Place to store VM object */
 253         struct  lock v_lock;                    /* file/dir ops lock */
 254         struct  lwkt_token v_token;             /* (see above) */
 255         enum    vtagtype v_tag;                 /* type of underlying data */
 256         void    *v_data;                        /* private data for fs */
 257         struct namecache_list v_namecache;      /* (S) associated nc entries */
 258         struct  {
 259                 struct  selinfo vpi_selinfo;    /* identity of poller(s) */
 260                 short   vpi_events;             /* what they are looking for */
 261                 short   vpi_revents;            /* what has happened */
 262         } v_pollinfo;
 263         struct vmresident *v_resident;          /* optional vmresident */
 264         struct vrangehead v_range;              /* range lock */
 265         struct ccms_dataspace v_ccms;           /* cache coherency */
 266 #ifdef  DEBUG_LOCKS
 267         const char *filename;                   /* Source file doing locking */
 268         int line;                               /* Line number doing locking */
 269 #endif
 270         void    *v_xaddr;
 271 };
 272 #define v_socket        v_un.vu_socket
 273 #define v_umajor        v_un.vu_cdev.vu_umajor
 274 #define v_uminor        v_un.vu_cdev.vu_uminor
 275 #define v_rdev          v_un.vu_cdev.vu_cdevinfo
 276 #define v_cdevnext      v_un.vu_cdev.vu_cdevnext
 277 #define v_fifoinfo      v_un.vu_fifoinfo
 278 #define v_spinlock      v_lock.lk_spinlock
 279
 280 #define VN_POLLEVENT(vp, events)                                \
 281         do {                                                    \
 282                 if ((vp)->v_pollinfo.vpi_events & (events))     \
 283                         vn_pollevent((vp), (events));           \
 284         } while (0)
 285
 286 /*
 287  * Vnode flags.
 288  */
 289 #define VROOT           0x00000001      /* root of its file system */
 290 #define VTEXT           0x00000002      /* vnode is a pure text prototype */
 291 #define VSYSTEM         0x00000004      /* vnode being used by kernel */
 292 #define VISTTY          0x00000008      /* vnode represents a tty */
 293 #define VCTTYISOPEN     0x00000010      /* controlling terminal tty is open */
 294 #define VCKPT           0x00000020      /* checkpoint-restored vnode */
 295 /* open for business    0x00000040 */
 296 #define VMAYHAVELOCKS   0x00000080      /* maybe posix or flock locks on vp */
 297 #define VPFSROOT        0x00000100      /* may be a pseudo filesystem root */
 298 /* open for business    0x00000200 */
 299 #define VAGE0           0x00000400      /* Age count for recycling - 2 bits */
 300 #define VAGE1           0x00000800      /* Age count for recycling - 2 bits */
 301 #define VCACHED         0x00001000      /* No active references but has cache value */
 302 #define VOBJBUF         0x00002000      /* Allocate buffers in VM object */
 303 #define VINACTIVE       0x00004000      /* The vnode is inactive (did VOP_INACTIVE) */
 304 /* open for business    0x00008000 */
 305 #define VOLOCK          0x00010000      /* vnode is locked waiting for an object */
 306 #define VOWANT          0x00020000      /* a process is waiting for VOLOCK */
 307 #define VRECLAIMED      0x00040000      /* This vnode has been destroyed */
 308 #define VFREE           0x00080000      /* This vnode is on the freelist */
 309 #define VNOTSEEKABLE    0x00100000      /* rd/wr ignores file offset */
 310 #define VONWORKLST      0x00200000      /* On syncer work-list */
 311 #define VMOUNT          0x00400000      /* Mount in progress */
 312 #define VOBJDIRTY       0x00800000      /* object might be dirty */
 313
 314 /* open for business    0x01000000 */
 315 /* open for business    0x02000000 */
 316 /* open for business    0x04000000 */
 317
 318 /*
 319  * vmntvnodescan() flags
 320  */
 321 #define VMSC_GETVP      0x01
 322 #define VMSC_GETVX      0x02
 323 #define VMSC_NOWAIT     0x10
 324 #define VMSC_ONEPASS    0x20
 325
 326 /*
 327  * Flags for ioflag. (high 16 bits used to ask for read-ahead and
 328  * help with write clustering)
 329  */
 330 #define IO_UNIT         0x0001          /* do I/O as atomic unit */
 331 #define IO_APPEND       0x0002          /* append write to end */
 332 #define IO_SYNC         0x0004          /* do I/O synchronously */
 333 #define IO_NODELOCKED   0x0008          /* underlying node already locked */
 334 #define IO_NDELAY       0x0010          /* FNDELAY flag set in file table */
 335 #define IO_VMIO         0x0020          /* data already in VMIO space */
 336 #define IO_INVAL        0x0040          /* invalidate after I/O */
 337 #define IO_ASYNC        0x0080          /* bawrite rather then bdwrite */
 338 #define IO_DIRECT       0x0100          /* attempt to bypass buffer cache */
 339 #define IO_RECURSE      0x0200          /* possibly device-recursive (vn) */
 340 #define IO_CORE         0x0400          /* I/O is part of core dump */
 341
 342 #define IO_SEQMAX       0x7F            /* seq heuristic max value */
 343 #define IO_SEQSHIFT     16              /* seq heuristic in upper 16 bits */
 344
 345 /*
 346  * Modes.  Note that these V-modes must match file S_I*USR, SUID, SGID,
 347  * and SVTX flag bits.
 348  */
 349 #define VSUID   04000           /* set user id on execution */
 350 #define VSGID   02000           /* set group id on execution */
 351 #define VSVTX   01000           /* save swapped text even after use */
 352 #define VREAD   00400           /* read, write, execute permissions */
 353 #define VWRITE  00200
 354 #define VEXEC   00100
 355
 356 /*
 357  * Token indicating no attribute value yet assigned.
 358  */
 359 #define VNOVAL  (-1)
 360
 361 /*
 362  * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
 363  */
 364 #define VLKTIMEOUT     (hz / 20 + 1)
 365
 366 #ifdef _KERNEL
 367
 368 /*
 369  * Convert between vnode types and inode formats (since POSIX.1
 370  * defines mode word of stat structure in terms of inode formats).
 371  */
 372 extern  enum vtype      iftovt_tab[];
 373 extern  int             vttoif_tab[];
 374 #define IFTOVT(mode)    (iftovt_tab[((mode) & S_IFMT) >> 12])
 375 #define VTTOIF(indx)    (vttoif_tab[(int)(indx)])
 376 #define MAKEIMODE(indx, mode)   (int)(VTTOIF(indx) | (mode))
 377
 378 /*
 379  * Flags to various vnode functions.
 380  */
 381 #define SKIPSYSTEM      0x0001          /* vflush: skip vnodes marked VSYSTEM */
 382 #define FORCECLOSE      0x0002          /* vflush: force file closure */
 383 #define WRITECLOSE      0x0004          /* vflush: only close writable files */
 384 #define DOCLOSE         0x0008          /* vclean: close active files */
 385 #define V_SAVE          0x0001          /* vinvalbuf: sync file first */
 386
 387 #ifdef DIAGNOSTIC
 388 #define VATTR_NULL(vap) vattr_null(vap)
 389 #else
 390 #define VATTR_NULL(vap) (*(vap) = va_null)      /* initialize a vattr */
 391 #endif /* DIAGNOSTIC */
 392
 393 #define NULLVP  ((struct vnode *)NULL)
 394
 395 #define VNODEOP_SET(f) \
 396         SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
 397         SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
 398
 399 /*
 400  * Global vnode data.
 401  */
 402 struct objcache;
 403
 404 extern  struct vnode *rootvnode;        /* root (i.e. "/") vnode */
 405 extern  struct nchandle rootnch;        /* root (i.e. "/") namecache */
 406 extern  int desiredvnodes;              /* number of vnodes desired */
 407 extern  time_t syncdelay;               /* max time to delay syncing data */
 408 extern  time_t filedelay;               /* time to delay syncing files */
 409 extern  time_t dirdelay;                /* time to delay syncing directories */
 410 extern  time_t metadelay;               /* time to delay syncing metadata */
 411 extern  struct objcache *namei_oc;
 412 extern  int prtactive;                  /* nonzero to call vprint() */
 413 extern  struct vattr va_null;           /* predefined null vattr structure */
 414 extern  int vfs_ioopt;
 415 extern  int numvnodes;
 416 extern  int freevnodes;
 417 extern  int vfs_fastdev;                /* fast specfs device access */
 418
 419 /*
 420  * Interlock for scanning list of vnodes attached to a mountpoint
 421  */
 422 extern struct lwkt_token mntvnode_token;
 423
 424 /*
 425  * This macro is very helpful in defining those offsets in the vdesc struct.
 426  *
 427  * This is stolen from X11R4.  I ignored all the fancy stuff for
 428  * Crays, so if you decide to port this to such a serious machine,
 429  * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
 430  */
 431 #define VOPARG_OFFSET(p_type,field) \
 432         ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
 433 #define VOPARG_OFFSETOF(s_type,field) \
 434         VOPARG_OFFSET(s_type*,field)
 435 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
 436         ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
 437
 438 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
 439
 440 /*
 441  * VOCALL calls an op given an ops vector.  We break it out because BSD's
 442  * vclean changes the ops vector and then wants to call ops with the old
 443  * vector.
 444  */
 445
 446 typedef int (*vocall_func_t)(struct vop_generic_args *);
 447
 448 /*
 449  * This call executes the vops vector for the offset stored in the ap's
 450  * descriptor of the passed vops rather then the one related to the
 451  * ap's vop_ops structure.  It is used to chain VOPS calls on behalf of
 452  * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
 453  * vector function).
 454  */
 455 #define VOCALL(vops, ap)                \
 456         (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
 457
 458 #define VDESC(OP) (& __CONCAT(OP,_desc))
 459
 460 /*
 461  * Public vnode manipulation functions.
 462  */
 463 struct file;
 464 struct mount;
 465 struct nlookupdata;
 466 struct proc;
 467 struct thread;
 468 struct stat;
 469 struct ucred;
 470 struct uio;
 471 struct vattr;
 472 struct vnode;
 473
 474 struct vnode *getsynthvnode(const char *devname);
 475 void    addaliasu (struct vnode *vp, int x, int y);
 476 int     v_associate_rdev(struct vnode *vp, cdev_t dev);
 477 void    v_release_rdev(struct vnode *vp);
 478 int     bdevvp (cdev_t dev, struct vnode **vpp);
 479 struct vnode *allocvnode(int lktimeout, int lkflags);
 480 int     freesomevnodes(int count);
 481 int     getnewvnode (enum vtagtype tag, struct mount *mp,
 482                     struct vnode **vpp, int timo, int lkflags);
 483 int     getspecialvnode (enum vtagtype tag, struct mount *mp,
 484                     struct vop_ops **ops, struct vnode **vpp, int timo,
 485                     int lkflags);
 486 int     speedup_syncer (void);
 487 int     vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *);
 488 void    vattr_null (struct vattr *vap);
 489 int     vcount (struct vnode *vp);
 490 int     vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
 491 void    vfs_nadd_vnodeops_sysinit (void *);
 492 void    vfs_nrm_vnodeops_sysinit (void *);
 493 void    vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
 494 void    vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
 495 int     vflush (struct mount *mp, int rootrefs, int flags);
 496 int     vmntvnodescan(struct mount *mp, int flags,
 497             int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
 498             int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
 499             void *data);
 500 void    insmntque(struct vnode *vp, struct mount *mp);
 501
 502 void    vclean_vxlocked (struct vnode *vp, int flags);
 503 void    vclean_unlocked (struct vnode *vp);
 504 void    vgone_vxlocked (struct vnode *vp);
 505 int     vrevoke (struct vnode *vp, struct ucred *cred);
 506 int     vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
 507 int     vtruncbuf (struct vnode *vp, off_t length, int blksize);
 508 void    vnode_pager_setsize (struct vnode *, vm_ooffset_t);
 509 int     nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff);
 510 int     nvextendbuf(struct vnode *vp, off_t olength, off_t nlength,
 511                 int oblksize, int nblksize,
 512                 int oboff, int nboff, int trivial);
 513 void    nvnode_pager_setsize (struct vnode *vp, off_t length,
 514                 int blksize, int boff);
 515 int     vfsync(struct vnode *vp, int waitfor, int passes,
 516                 int (*checkdef)(struct buf *),
 517                 int (*waitoutput)(struct vnode *, struct thread *));
 518 int     vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff);
 519 void    vprint (char *label, struct vnode *vp);
 520 int     vrecycle (struct vnode *vp);
 521 int     vmaxiosize (struct vnode *vp);
 522 void    vn_strategy(struct vnode *vp, struct bio *bio);
 523 int     vn_cache_strategy(struct vnode *vp, struct bio *bio);
 524 int     vn_close (struct vnode *vp, int flags);
 525 int     vn_isdisk (struct vnode *vp, int *errp);
 526 int     vn_lock (struct vnode *vp, int flags);
 527 int     vn_islocked (struct vnode *vp);
 528 int     vn_islocked_unlock (struct vnode *vp);
 529 void    vn_islocked_relock (struct vnode *vp, int vpls);
 530 void    vn_unlock (struct vnode *vp);
 531 #ifdef  DEBUG_LOCKS
 532 int     debug_vn_lock (struct vnode *vp, int flags,
 533                 const char *filename, int line);
 534 #define vn_lock(vp,flags)       debug_vn_lock(vp, flags, __FILE__, __LINE__)
 535 #endif
 536
 537 int     vn_get_namelen(struct vnode *, int *);
 538 void    vn_setspecops (struct file *fp);
 539 int     vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
 540 int     vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
 541 int     vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
 542 void    vn_pollevent (struct vnode *vp, int events);
 543 void    vn_pollgone (struct vnode *vp);
 544 int     vn_pollrecord (struct vnode *vp, int events);
 545 int     vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
 546             int len, off_t offset, enum uio_seg segflg, int ioflg,
 547             struct ucred *cred, int *aresid);
 548 int     vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
 549             int len, off_t offset, enum uio_seg segflg, int ioflg,
 550             struct ucred *cred, int *aresid);
 551 int     vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
 552 cdev_t  vn_todev (struct vnode *vp);
 553 void    vfs_timestamp (struct timespec *);
 554 size_t  vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp);
 555 void    vn_mark_atime(struct vnode *vp, struct thread *td);
 556 int     vn_writechk (struct vnode *vp, struct nchandle *nch);
 557 int     ncp_writechk(struct nchandle *nch);
 558 int     vop_stdopen (struct vop_open_args *ap);
 559 int     vop_stdclose (struct vop_close_args *ap);
 560 int     vop_stdmountctl(struct vop_mountctl_args *ap);
 561 int     vop_stdgetpages(struct vop_getpages_args *ap);
 562 int     vop_stdputpages(struct vop_putpages_args *ap);
 563 int     vop_stdmarkatime(struct vop_markatime_args *ap);
 564 int     vop_stdnoread(struct vop_read_args *ap);
 565 int     vop_stdnowrite(struct vop_write_args *ap);
 566 int     vop_nopoll (struct vop_poll_args *ap);
 567 int     vop_stdpathconf (struct vop_pathconf_args *ap);
 568 int     vop_stdpoll (struct vop_poll_args *ap);
 569 int     vop_eopnotsupp (struct vop_generic_args *ap);
 570 int     vop_ebadf (struct vop_generic_args *ap);
 571 int     vop_einval (struct vop_generic_args *ap);
 572 int     vop_enotty (struct vop_generic_args *ap);
 573 int     vop_defaultop (struct vop_generic_args *ap);
 574 int     vop_null (struct vop_generic_args *ap);
 575 int     vop_panic (struct vop_generic_args *ap);
 576 int     vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
 577                          const char *);
 578
 579 int     vop_compat_nresolve(struct vop_nresolve_args *ap);
 580 int     vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
 581 int     vop_compat_ncreate(struct vop_ncreate_args *ap);
 582 int     vop_compat_nmkdir(struct vop_nmkdir_args *ap);
 583 int     vop_compat_nmknod(struct vop_nmknod_args *ap);
 584 int     vop_compat_nlink(struct vop_nlink_args *ap);
 585 int     vop_compat_nsymlink(struct vop_nsymlink_args *ap);
 586 int     vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
 587 int     vop_compat_nremove(struct vop_nremove_args *ap);
 588 int     vop_compat_nrmdir(struct vop_nrmdir_args *ap);
 589 int     vop_compat_nrename(struct vop_nrename_args *ap);
 590
 591 void    vx_lock (struct vnode *vp);
 592 void    vx_unlock (struct vnode *vp);
 593 void    vx_get (struct vnode *vp);
 594 int     vx_get_nonblock (struct vnode *vp);
 595 void    vx_put (struct vnode *vp);
 596 int     vget (struct vnode *vp, int lockflag);
 597 void    vput (struct vnode *vp);
 598 void    vhold (struct vnode *);
 599 void    vhold_interlocked (struct vnode *);
 600 void    vdrop (struct vnode *);
 601 void    vref (struct vnode *vp);
 602 void    vrele (struct vnode *vp);
 603 void    vsetflags (struct vnode *vp, int flags);
 604 void    vclrflags (struct vnode *vp, int flags);
 605
 606 void    vfs_subr_init(void);
 607 void    vfs_mount_init(void);
 608 void    vfs_lock_init(void);
 609 void    vfs_sync_init(void);
 610 void    mount_init(struct mount *mp);
 611
 612 void    vn_syncer_add_to_worklist(struct vnode *, int);
 613 void    vnlru_proc_wait(void);
 614
 615 extern  struct vop_ops default_vnode_vops;
 616 extern  struct vop_ops dead_vnode_vops;
 617
 618 extern  struct vop_ops *default_vnode_vops_p;
 619 extern  struct vop_ops *dead_vnode_vops_p;
 620
 621 #endif  /* _KERNEL */
 622
 623 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
 624 #endif  /* !_SYS_VNODE_H_ */