vnode.h revision 48312
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 * $Id: vnode.h,v 1.88 1999/06/15 23:36:59 mckusick Exp $ 35 */ 36 37#ifndef _SYS_VNODE_H_ 38#define _SYS_VNODE_H_ 39 40#include <sys/queue.h> 41#include <sys/select.h> 42#include <sys/uio.h> 43 44#include <machine/lock.h> 45 46/* 47 * The vnode is the focus of all file activity in UNIX. There is a 48 * unique vnode allocated for each active file, each current directory, 49 * each mounted-on file, text file, and the root. 50 */ 51 52/* 53 * Vnode types. VNON means no type. 54 */ 55enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 56 57/* 58 * Vnode tag types. 59 * These are for the benefit of external programs only (e.g., pstat) 60 * and should NEVER be inspected by the kernel. 61 */ 62enum vtagtype { 63 VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, 64 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, 65 VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS 66}; 67 68/* 69 * Each underlying filesystem allocates its own private area and hangs 70 * it from v_data. If non-null, this area is freed in getnewvnode(). 71 */ 72TAILQ_HEAD(buflists, buf); 73 74typedef int vop_t __P((void *)); 75struct namecache; 76 77/* 78 * Reading or writing any of these items requires holding the appropriate lock. 79 * v_freelist is locked by the global vnode_free_list simple lock. 80 * v_mntvnodes is locked by the global mntvnodes simple lock. 81 * v_flag, v_usecount, v_holdcount and v_writecount are 82 * locked by the v_interlock simple lock. 83 * v_pollinfo is locked by the lock contained inside it. 84 */ 85struct vnode { 86 u_long v_flag; /* vnode flags (see below) */ 87 int v_usecount; /* reference count of users */ 88 int v_writecount; /* reference count of writers */ 89 int v_holdcnt; /* page & buffer references */ 90 daddr_t v_lastr; /* last read (read-ahead) */ 91 u_long v_id; /* capability identifier */ 92 struct mount *v_mount; /* ptr to vfs we are in */ 93 vop_t **v_op; /* vnode operations vector */ 94 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 95 LIST_ENTRY(vnode) v_mntvnodes; /* vnodes for mount point */ 96 struct buflists v_cleanblkhd; /* clean blocklist head */ 97 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 98 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 99 long v_numoutput; /* num of writes in progress */ 100 enum vtype v_type; /* vnode type */ 101 union { 102 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 103 struct socket *vu_socket; /* unix ipc (VSOCK) */ 104 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 105 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 106 } v_un; 107 struct nqlease *v_lease; /* Soft reference to lease */ 108 daddr_t v_lastw; /* last write (write cluster) */ 109 daddr_t v_cstart; /* start block of cluster */ 110 daddr_t v_lasta; /* last allocation */ 111 int v_clen; /* length of current cluster */ 112 int v_maxio; /* maximum I/O cluster size */ 113 struct vm_object *v_object; /* Place to store VM object */ 114 struct simplelock v_interlock; /* lock on usecount and flag */ 115 struct lock *v_vnlock; /* used for non-locking fs's */ 116 enum vtagtype v_tag; /* type of underlying data */ 117 void *v_data; /* private data for fs */ 118 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 119 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 120 struct vnode *v_dd; /* .. vnode */ 121 u_long v_ddid; /* .. capability identifier */ 122 struct { 123 struct simplelock vpi_lock; /* lock to protect below */ 124 struct selinfo vpi_selinfo; /* identity of poller(s) */ 125 short vpi_events; /* what they are looking for */ 126 short vpi_revents; /* what has happened */ 127 } v_pollinfo; 128#ifdef DEBUG_LOCKS 129 const char *filename; /* Source file doing locking */ 130 int line; /* Line number doing locking */ 131#endif 132}; 133#define v_mountedhere v_un.vu_mountedhere 134#define v_socket v_un.vu_socket 135#define v_specinfo v_un.vu_specinfo 136#define v_fifoinfo v_un.vu_fifoinfo 137 138#define VN_POLLEVENT(vp, events) \ 139 do { \ 140 if ((vp)->v_pollinfo.vpi_events & (events)) \ 141 vn_pollevent((vp), (events)); \ 142 } while (0) 143 144/* 145 * Vnode flags. 146 */ 147#define VROOT 0x00001 /* root of its file system */ 148#define VTEXT 0x00002 /* vnode is a pure text prototype */ 149#define VSYSTEM 0x00004 /* vnode being used by kernel */ 150#define VISTTY 0x00008 /* vnode represents a tty */ 151#define VXLOCK 0x00100 /* vnode is locked to change underlying type */ 152#define VXWANT 0x00200 /* process is waiting for vnode */ 153#define VBWAIT 0x00400 /* waiting for output to complete */ 154#define VALIASED 0x00800 /* vnode has an alias */ 155#define VDIROP 0x01000 /* LFS: vnode is involved in a directory op */ 156#define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 157#define VNINACT 0x04000 /* LFS: skip ufs_inactive() in lfs_vunref */ 158#define VAGE 0x08000 /* Insert vnode at head of free list */ 159#define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 160#define VOWANT 0x20000 /* a process is waiting for VOLOCK */ 161#define VDOOMED 0x40000 /* This vnode is being recycled */ 162#define VFREE 0x80000 /* This vnode is on the freelist */ 163#define VTBFREE 0x100000 /* This vnode is on the to-be-freelist */ 164#define VONWORKLST 0x200000 /* On syncer work-list */ 165#define VMOUNT 0x400000 /* Mount in progress */ 166 167/* 168 * Vnode attributes. A field value of VNOVAL represents a field whose value 169 * is unavailable (getattr) or which is not to be changed (setattr). 170 */ 171struct vattr { 172 enum vtype va_type; /* vnode type (for create) */ 173 u_short va_mode; /* files access mode and type */ 174 short va_nlink; /* number of references to file */ 175 uid_t va_uid; /* owner user id */ 176 gid_t va_gid; /* owner group id */ 177 udev_t va_fsid; /* file system id */ 178 long va_fileid; /* file id */ 179 u_quad_t va_size; /* file size in bytes */ 180 long va_blocksize; /* blocksize preferred for i/o */ 181 struct timespec va_atime; /* time of last access */ 182 struct timespec va_mtime; /* time of last modification */ 183 struct timespec va_ctime; /* time file changed */ 184 u_long va_gen; /* generation number of file */ 185 u_long va_flags; /* flags defined for file */ 186 udev_t va_rdev; /* device the special file represents */ 187 u_quad_t va_bytes; /* bytes of disk space held by file */ 188 u_quad_t va_filerev; /* file modification number */ 189 u_int va_vaflags; /* operations flags, see below */ 190 long va_spare; /* remain quad aligned */ 191}; 192 193/* 194 * Flags for va_vaflags. 195 */ 196#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 197#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 198 199/* 200 * Flags for ioflag. 201 */ 202#define IO_UNIT 0x01 /* do I/O as atomic unit */ 203#define IO_APPEND 0x02 /* append write to end */ 204#define IO_SYNC 0x04 /* do I/O synchronously */ 205#define IO_NODELOCKED 0x08 /* underlying node already locked */ 206#define IO_NDELAY 0x10 /* FNDELAY flag set in file table */ 207#define IO_VMIO 0x20 /* data already in VMIO space */ 208#define IO_INVAL 0x40 /* invalidate after I/O */ 209 210/* 211 * Modes. Some values same as Ixxx entries from inode.h for now. 212 */ 213#define VSUID 04000 /* set user id on execution */ 214#define VSGID 02000 /* set group id on execution */ 215#define VSVTX 01000 /* save swapped text even after use */ 216#define VREAD 00400 /* read, write, execute permissions */ 217#define VWRITE 00200 218#define VEXEC 00100 219 220/* 221 * Token indicating no attribute value yet assigned. 222 */ 223#define VNOVAL (-1) 224 225#ifdef KERNEL 226 227#ifdef MALLOC_DECLARE 228MALLOC_DECLARE(M_VNODE); 229#endif 230 231/* 232 * Convert between vnode types and inode formats (since POSIX.1 233 * defines mode word of stat structure in terms of inode formats). 234 */ 235extern enum vtype iftovt_tab[]; 236extern int vttoif_tab[]; 237#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 238#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 239#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 240 241/* 242 * Flags to various vnode functions. 243 */ 244#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 245#define FORCECLOSE 0x0002 /* vflush: force file closure */ 246#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 247#define DOCLOSE 0x0008 /* vclean: close active files */ 248#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 249#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 250 251#define VREF(vp) vref(vp) 252 253 254#ifdef DIAGNOSTIC 255#define VATTR_NULL(vap) vattr_null(vap) 256#else 257#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 258#endif /* DIAGNOSTIC */ 259 260#define NULLVP ((struct vnode *)NULL) 261 262#define VNODEOP_SET(f) \ 263 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 264 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 265 266/* 267 * Global vnode data. 268 */ 269extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 270extern int desiredvnodes; /* number of vnodes desired */ 271extern time_t syncdelay; /* max time to delay syncing data */ 272extern time_t filedelay; /* time to delay syncing files */ 273extern time_t dirdelay; /* time to delay syncing directories */ 274extern time_t metadelay; /* time to delay syncing metadata */ 275extern struct vm_zone *namei_zone; 276extern int prtactive; /* nonzero to call vprint() */ 277extern struct vattr va_null; /* predefined null vattr structure */ 278extern int vfs_ioopt; 279 280/* 281 * Macro/function to check for client cache inconsistency w.r.t. leasing. 282 */ 283#define LEASE_READ 0x1 /* Check lease for readers */ 284#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 285 286 287extern void (*lease_updatetime) __P((int deltat)); 288 289#define VSHOULDFREE(vp) \ 290 (!((vp)->v_flag & (VFREE|VDOOMED)) && \ 291 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 292 (!(vp)->v_object || \ 293 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 294 295#define VSHOULDBUSY(vp) \ 296 (((vp)->v_flag & (VFREE|VTBFREE)) && \ 297 ((vp)->v_holdcnt || (vp)->v_usecount)) 298 299#endif /* KERNEL */ 300 301 302/* 303 * Mods for extensibility. 304 */ 305 306/* 307 * Flags for vdesc_flags: 308 */ 309#define VDESC_MAX_VPS 16 310/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 311#define VDESC_VP0_WILLRELE 0x0001 312#define VDESC_VP1_WILLRELE 0x0002 313#define VDESC_VP2_WILLRELE 0x0004 314#define VDESC_VP3_WILLRELE 0x0008 315#define VDESC_NOMAP_VPP 0x0100 316#define VDESC_VPP_WILLRELE 0x0200 317 318/* 319 * VDESC_NO_OFFSET is used to identify the end of the offset list 320 * and in places where no such field exists. 321 */ 322#define VDESC_NO_OFFSET -1 323 324/* 325 * This structure describes the vnode operation taking place. 326 */ 327struct vnodeop_desc { 328 int vdesc_offset; /* offset in vector--first for speed */ 329 char *vdesc_name; /* a readable name for debugging */ 330 int vdesc_flags; /* VDESC_* flags */ 331 332 /* 333 * These ops are used by bypass routines to map and locate arguments. 334 * Creds and procs are not needed in bypass routines, but sometimes 335 * they are useful to (for example) transport layers. 336 * Nameidata is useful because it has a cred in it. 337 */ 338 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 339 int vdesc_vpp_offset; /* return vpp location */ 340 int vdesc_cred_offset; /* cred location, if any */ 341 int vdesc_proc_offset; /* proc location, if any */ 342 int vdesc_componentname_offset; /* if any */ 343 /* 344 * Finally, we've got a list of private data (about each operation) 345 * for each transport layer. (Support to manage this list is not 346 * yet part of BSD.) 347 */ 348 caddr_t *vdesc_transports; 349}; 350 351#ifdef KERNEL 352/* 353 * A list of all the operation descs. 354 */ 355extern struct vnodeop_desc *vnodeop_descs[]; 356 357/* 358 * Interlock for scanning list of vnodes attached to a mountpoint 359 */ 360extern struct simplelock mntvnode_slock; 361 362/* 363 * This macro is very helpful in defining those offsets in the vdesc struct. 364 * 365 * This is stolen from X11R4. I ignored all the fancy stuff for 366 * Crays, so if you decide to port this to such a serious machine, 367 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 368 */ 369#define VOPARG_OFFSET(p_type,field) \ 370 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 371#define VOPARG_OFFSETOF(s_type,field) \ 372 VOPARG_OFFSET(s_type*,field) 373#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 374 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 375 376 377/* 378 * This structure is used to configure the new vnodeops vector. 379 */ 380struct vnodeopv_entry_desc { 381 struct vnodeop_desc *opve_op; /* which operation this is */ 382 vop_t *opve_impl; /* code implementing this operation */ 383}; 384struct vnodeopv_desc { 385 /* ptr to the ptr to the vector where op should go */ 386 vop_t ***opv_desc_vector_p; 387 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 388}; 389 390/* 391 * A generic structure. 392 * This can be used by bypass routines to identify generic arguments. 393 */ 394struct vop_generic_args { 395 struct vnodeop_desc *a_desc; 396 /* other random data follows, presumably */ 397}; 398 399 400#ifdef DEBUG_VFS_LOCKS 401/* 402 * Macros to aid in tracing VFS locking problems. Not totally 403 * reliable since if the process sleeps between changing the lock 404 * state and checking it with the assert, some other process could 405 * change the state. They are good enough for debugging a single 406 * filesystem using a single-threaded test. I find that 'cvs co src' 407 * is a pretty good test. 408 */ 409 410/* 411 * [dfr] Kludge until I get around to fixing all the vfs locking. 412 */ 413#define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \ 414 || (vp)->v_tag == VT_MFS \ 415 || (vp)->v_tag == VT_NFS \ 416 || (vp)->v_tag == VT_LFS \ 417 || (vp)->v_tag == VT_ISOFS \ 418 || (vp)->v_tag == VT_MSDOSFS \ 419 || (vp)->v_tag == VT_DEVFS) 420 421#define ASSERT_VOP_LOCKED(vp, str) \ 422 if ((vp) && IS_LOCKING_VFS(vp) && !VOP_ISLOCKED(vp)) { \ 423 panic("%s: %p is not locked but should be", str, vp); \ 424 } 425 426#define ASSERT_VOP_UNLOCKED(vp, str) \ 427 if ((vp) && IS_LOCKING_VFS(vp) && VOP_ISLOCKED(vp)) { \ 428 panic("%s: %p is locked but shouldn't be", str, vp); \ 429 } 430 431#else 432 433#define ASSERT_VOP_LOCKED(vp, str) 434#define ASSERT_VOP_UNLOCKED(vp, str) 435 436#endif 437 438/* 439 * VOCALL calls an op given an ops vector. We break it out because BSD's 440 * vclean changes the ops vector and then wants to call ops with the old 441 * vector. 442 */ 443#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 444 445/* 446 * This call works for vnodes in the kernel. 447 */ 448#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 449#define VDESC(OP) (& __CONCAT(OP,_desc)) 450#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 451 452/* 453 * Finally, include the default set of vnode operations. 454 */ 455#include "vnode_if.h" 456 457/* 458 * Public vnode manipulation functions. 459 */ 460struct componentname; 461struct file; 462struct mount; 463struct nameidata; 464struct ostat; 465struct proc; 466struct stat; 467struct nstat; 468struct ucred; 469struct uio; 470struct vattr; 471struct vnode; 472struct vop_bwrite_args; 473 474extern int (*lease_check_hook) __P((struct vop_lease_args *)); 475 476int bdevvp __P((dev_t dev, struct vnode **vpp)); 477/* cache_* may belong in namei.h. */ 478void cache_enter __P((struct vnode *dvp, struct vnode *vp, 479 struct componentname *cnp)); 480int cache_lookup __P((struct vnode *dvp, struct vnode **vpp, 481 struct componentname *cnp)); 482void cache_purge __P((struct vnode *vp)); 483void cache_purgevfs __P((struct mount *mp)); 484void cvtstat __P((struct stat *st, struct ostat *ost)); 485void cvtnstat __P((struct stat *sb, struct nstat *nsb)); 486int getnewvnode __P((enum vtagtype tag, 487 struct mount *mp, vop_t **vops, struct vnode **vpp)); 488int lease_check __P((struct vop_lease_args *ap)); 489int speedup_syncer __P((void)); 490void vattr_null __P((struct vattr *vap)); 491int vcount __P((struct vnode *vp)); 492void vdrop __P((struct vnode *)); 493int vfinddev __P((dev_t dev, enum vtype type, struct vnode **vpp)); 494void vfs_add_vnodeops __P((const void *)); 495void vfs_rm_vnodeops __P((const void *)); 496int vflush __P((struct mount *mp, struct vnode *skipvp, int flags)); 497int vget __P((struct vnode *vp, int lockflag, struct proc *p)); 498void vgone __P((struct vnode *vp)); 499void vhold __P((struct vnode *)); 500int vinvalbuf __P((struct vnode *vp, int save, struct ucred *cred, 501 502 struct proc *p, int slpflag, int slptimeo)); 503int vtruncbuf __P((struct vnode *vp, struct ucred *cred, struct proc *p, 504 off_t length, int blksize)); 505void vprint __P((char *label, struct vnode *vp)); 506int vrecycle __P((struct vnode *vp, struct simplelock *inter_lkp, 507 struct proc *p)); 508int vn_close __P((struct vnode *vp, 509 int flags, struct ucred *cred, struct proc *p)); 510int vn_lock __P((struct vnode *vp, int flags, struct proc *p)); 511#ifdef DEBUG_LOCKS 512int debug_vn_lock __P((struct vnode *vp, int flags, struct proc *p, 513 const char *filename, int line)); 514#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 515#endif 516int vn_open __P((struct nameidata *ndp, int fmode, int cmode)); 517void vn_pollevent __P((struct vnode *vp, int events)); 518void vn_pollgone __P((struct vnode *vp)); 519int vn_pollrecord __P((struct vnode *vp, struct proc *p, int events)); 520int vn_rdwr __P((enum uio_rw rw, struct vnode *vp, caddr_t base, 521 int len, off_t offset, enum uio_seg segflg, int ioflg, 522 struct ucred *cred, int *aresid, struct proc *p)); 523int vn_stat __P((struct vnode *vp, struct stat *sb, struct proc *p)); 524int vfs_cache_lookup __P((struct vop_lookup_args *ap)); 525int vfs_object_create __P((struct vnode *vp, struct proc *p, 526 struct ucred *cred)); 527int vn_writechk __P((struct vnode *vp)); 528int vop_stdbwrite __P((struct vop_bwrite_args *ap)); 529int vop_stdislocked __P((struct vop_islocked_args *)); 530int vop_stdlock __P((struct vop_lock_args *)); 531int vop_stdunlock __P((struct vop_unlock_args *)); 532int vop_noislocked __P((struct vop_islocked_args *)); 533int vop_nolock __P((struct vop_lock_args *)); 534int vop_nopoll __P((struct vop_poll_args *)); 535int vop_nounlock __P((struct vop_unlock_args *)); 536int vop_stdpathconf __P((struct vop_pathconf_args *)); 537int vop_stdpoll __P((struct vop_poll_args *)); 538int vop_revoke __P((struct vop_revoke_args *)); 539int vop_sharedlock __P((struct vop_lock_args *)); 540int vop_eopnotsupp __P((struct vop_generic_args *ap)); 541int vop_ebadf __P((struct vop_generic_args *ap)); 542int vop_einval __P((struct vop_generic_args *ap)); 543int vop_enotty __P((struct vop_generic_args *ap)); 544int vop_defaultop __P((struct vop_generic_args *ap)); 545int vop_null __P((struct vop_generic_args *ap)); 546int vop_panic __P((struct vop_generic_args *ap)); 547 548struct vnode * 549 checkalias __P((struct vnode *vp, udev_t nvp_rdev, struct mount *mp)); 550void vput __P((struct vnode *vp)); 551void vrele __P((struct vnode *vp)); 552void vref __P((struct vnode *vp)); 553void vbusy __P((struct vnode *vp)); 554 555extern vop_t **default_vnodeop_p; 556 557extern TAILQ_HEAD(tobefreelist, vnode) 558 vnode_tobefree_list; /* vnode free list */ 559 560#endif /* KERNEL */ 561 562#endif /* !_SYS_VNODE_H_ */ 563