vnode.h revision 59480
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: head/sys/sys/vnode.h 59480 2000-04-22 03:44:00Z green $ 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#include <sys/acl.h> 44 45#include <machine/lock.h> 46 47/* 48 * The vnode is the focus of all file activity in UNIX. There is a 49 * unique vnode allocated for each active file, each current directory, 50 * each mounted-on file, text file, and the root. 51 */ 52 53/* 54 * Vnode types. VNON means no type. 55 */ 56enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 57 58/* 59 * Vnode tag types. 60 * These are for the benefit of external programs only (e.g., pstat) 61 * and should NEVER be inspected by the kernel. 62 */ 63enum vtagtype { 64 VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, 65 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, 66 VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS, 67 VT_HPFS, VT_NWFS 68}; 69 70/* 71 * Each underlying filesystem allocates its own private area and hangs 72 * it from v_data. If non-null, this area is freed in getnewvnode(). 73 */ 74TAILQ_HEAD(buflists, buf); 75 76typedef int vop_t __P((void *)); 77 78/* 79 * This structure describes the elements in the cache of recent 80 * names looked up by namei. 81 */ 82 83struct vnode; 84 85struct namecache { 86 LIST_ENTRY(namecache) nc_hash; /* hash chain */ 87 LIST_ENTRY(namecache) nc_src; /* source vnode list */ 88 TAILQ_ENTRY(namecache) nc_dst; /* destination vnode list */ 89 struct vnode *nc_dvp; /* vnode of parent of name */ 90 struct vnode *nc_vp; /* vnode the name refers to */ 91 u_char nc_flag; /* flag bits */ 92 u_char nc_nlen; /* length of name */ 93 char nc_name[0]; /* segment name */ 94}; 95 96/* 97 * Reading or writing any of these items requires holding the appropriate lock. 98 * v_freelist is locked by the global vnode_free_list simple lock. 99 * v_mntvnodes is locked by the global mntvnodes simple lock. 100 * v_flag, v_usecount, v_holdcount and v_writecount are 101 * locked by the v_interlock simple lock. 102 * v_pollinfo is locked by the lock contained inside it. 103 */ 104struct vnode { 105 u_long v_flag; /* vnode flags (see below) */ 106 int v_usecount; /* reference count of users */ 107 int v_writecount; /* reference count of writers */ 108 int v_holdcnt; /* page & buffer references */ 109 u_long v_id; /* capability identifier */ 110 struct mount *v_mount; /* ptr to vfs we are in */ 111 vop_t **v_op; /* vnode operations vector */ 112 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 113 LIST_ENTRY(vnode) v_mntvnodes; /* vnodes for mount point */ 114 struct buflists v_cleanblkhd; /* clean blocklist head */ 115 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 116 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 117 long v_numoutput; /* num of writes in progress */ 118 enum vtype v_type; /* vnode type */ 119 union { 120 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 121 struct socket *vu_socket; /* unix ipc (VSOCK) */ 122 struct { 123 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 124 SLIST_ENTRY(vnode) vu_specnext; 125 } vu_spec; 126 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 127 } v_un; 128 struct nqlease *v_lease; /* Soft reference to lease */ 129 daddr_t v_lastw; /* last write (write cluster) */ 130 daddr_t v_cstart; /* start block of cluster */ 131 daddr_t v_lasta; /* last allocation */ 132 int v_clen; /* length of current cluster */ 133 struct vm_object *v_object; /* Place to store VM object */ 134 struct simplelock v_interlock; /* lock on usecount and flag */ 135 struct lock *v_vnlock; /* used for non-locking fs's */ 136 enum vtagtype v_tag; /* type of underlying data */ 137 void *v_data; /* private data for fs */ 138 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 139 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 140 struct vnode *v_dd; /* .. vnode */ 141 u_long v_ddid; /* .. capability identifier */ 142 struct { 143 struct simplelock vpi_lock; /* lock to protect below */ 144 struct selinfo vpi_selinfo; /* identity of poller(s) */ 145 short vpi_events; /* what they are looking for */ 146 short vpi_revents; /* what has happened */ 147 } v_pollinfo; 148#ifdef DEBUG_LOCKS 149 const char *filename; /* Source file doing locking */ 150 int line; /* Line number doing locking */ 151#endif 152}; 153#define v_mountedhere v_un.vu_mountedhere 154#define v_socket v_un.vu_socket 155#define v_rdev v_un.vu_spec.vu_specinfo 156#define v_specnext v_un.vu_spec.vu_specnext 157#define v_fifoinfo v_un.vu_fifoinfo 158 159#define VN_POLLEVENT(vp, events) \ 160 do { \ 161 if ((vp)->v_pollinfo.vpi_events & (events)) \ 162 vn_pollevent((vp), (events)); \ 163 } while (0) 164 165/* 166 * Vnode flags. 167 */ 168#define VROOT 0x00001 /* root of its file system */ 169#define VTEXT 0x00002 /* vnode is a pure text prototype */ 170#define VSYSTEM 0x00004 /* vnode being used by kernel */ 171#define VISTTY 0x00008 /* vnode represents a tty */ 172#define VXLOCK 0x00100 /* vnode is locked to change underlying type */ 173#define VXWANT 0x00200 /* process is waiting for vnode */ 174#define VBWAIT 0x00400 /* waiting for output to complete */ 175/* open for business 0x00800 */ 176/* open for business 0x01000 */ 177#define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 178/* open for business 0x04000 */ 179#define VAGE 0x08000 /* Insert vnode at head of free list */ 180#define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 181#define VOWANT 0x20000 /* a process is waiting for VOLOCK */ 182#define VDOOMED 0x40000 /* This vnode is being recycled */ 183#define VFREE 0x80000 /* This vnode is on the freelist */ 184#define VTBFREE 0x100000 /* This vnode is on the to-be-freelist */ 185#define VONWORKLST 0x200000 /* On syncer work-list */ 186#define VMOUNT 0x400000 /* Mount in progress */ 187 188/* 189 * Vnode attributes. A field value of VNOVAL represents a field whose value 190 * is unavailable (getattr) or which is not to be changed (setattr). 191 */ 192struct vattr { 193 enum vtype va_type; /* vnode type (for create) */ 194 u_short va_mode; /* files access mode and type */ 195 short va_nlink; /* number of references to file */ 196 uid_t va_uid; /* owner user id */ 197 gid_t va_gid; /* owner group id */ 198 udev_t va_fsid; /* file system id */ 199 long va_fileid; /* file id */ 200 u_quad_t va_size; /* file size in bytes */ 201 long va_blocksize; /* blocksize preferred for i/o */ 202 struct timespec va_atime; /* time of last access */ 203 struct timespec va_mtime; /* time of last modification */ 204 struct timespec va_ctime; /* time file changed */ 205 u_long va_gen; /* generation number of file */ 206 u_long va_flags; /* flags defined for file */ 207 udev_t va_rdev; /* device the special file represents */ 208 u_quad_t va_bytes; /* bytes of disk space held by file */ 209 u_quad_t va_filerev; /* file modification number */ 210 u_int va_vaflags; /* operations flags, see below */ 211 long va_spare; /* remain quad aligned */ 212}; 213 214/* 215 * Flags for va_vaflags. 216 */ 217#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 218#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 219 220/* 221 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 222 * help with write clustering) 223 */ 224#define IO_UNIT 0x01 /* do I/O as atomic unit */ 225#define IO_APPEND 0x02 /* append write to end */ 226#define IO_SYNC 0x04 /* do I/O synchronously */ 227#define IO_NODELOCKED 0x08 /* underlying node already locked */ 228#define IO_NDELAY 0x10 /* FNDELAY flag set in file table */ 229#define IO_VMIO 0x20 /* data already in VMIO space */ 230#define IO_INVAL 0x40 /* invalidate after I/O */ 231 232/* 233 * Modes. Some values same as Ixxx entries from inode.h for now. 234 */ 235#define VSUID 04000 /* set user id on execution */ 236#define VSGID 02000 /* set group id on execution */ 237#define VSVTX 01000 /* save swapped text even after use */ 238#define VREAD 00400 /* read, write, execute permissions */ 239#define VWRITE 00200 240#define VEXEC 00100 241 242/* 243 * Token indicating no attribute value yet assigned. 244 */ 245#define VNOVAL (-1) 246 247#ifdef _KERNEL 248 249#ifdef MALLOC_DECLARE 250MALLOC_DECLARE(M_VNODE); 251#endif 252 253/* 254 * Convert between vnode types and inode formats (since POSIX.1 255 * defines mode word of stat structure in terms of inode formats). 256 */ 257extern enum vtype iftovt_tab[]; 258extern int vttoif_tab[]; 259#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 260#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 261#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 262 263/* 264 * Flags to various vnode functions. 265 */ 266#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 267#define FORCECLOSE 0x0002 /* vflush: force file closure */ 268#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 269#define DOCLOSE 0x0008 /* vclean: close active files */ 270#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 271#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 272 273#define VREF(vp) vref(vp) 274 275 276#ifdef DIAGNOSTIC 277#define VATTR_NULL(vap) vattr_null(vap) 278#else 279#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 280#endif /* DIAGNOSTIC */ 281 282#define NULLVP ((struct vnode *)NULL) 283 284#define VNODEOP_SET(f) \ 285 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 286 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 287 288/* 289 * Global vnode data. 290 */ 291extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 292extern int desiredvnodes; /* number of vnodes desired */ 293extern time_t syncdelay; /* max time to delay syncing data */ 294extern time_t filedelay; /* time to delay syncing files */ 295extern time_t dirdelay; /* time to delay syncing directories */ 296extern time_t metadelay; /* time to delay syncing metadata */ 297extern struct vm_zone *namei_zone; 298extern int prtactive; /* nonzero to call vprint() */ 299extern struct vattr va_null; /* predefined null vattr structure */ 300extern int vfs_ioopt; 301 302/* 303 * Macro/function to check for client cache inconsistency w.r.t. leasing. 304 */ 305#define LEASE_READ 0x1 /* Check lease for readers */ 306#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 307 308 309extern void (*lease_updatetime) __P((int deltat)); 310 311#define VSHOULDFREE(vp) \ 312 (!((vp)->v_flag & (VFREE|VDOOMED)) && \ 313 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 314 (!(vp)->v_object || \ 315 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 316 317#define VSHOULDBUSY(vp) \ 318 (((vp)->v_flag & (VFREE|VTBFREE)) && \ 319 ((vp)->v_holdcnt || (vp)->v_usecount)) 320 321#endif /* _KERNEL */ 322 323 324/* 325 * Mods for extensibility. 326 */ 327 328/* 329 * Flags for vdesc_flags: 330 */ 331#define VDESC_MAX_VPS 16 332/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 333#define VDESC_VP0_WILLRELE 0x0001 334#define VDESC_VP1_WILLRELE 0x0002 335#define VDESC_VP2_WILLRELE 0x0004 336#define VDESC_VP3_WILLRELE 0x0008 337#define VDESC_NOMAP_VPP 0x0100 338#define VDESC_VPP_WILLRELE 0x0200 339 340/* 341 * VDESC_NO_OFFSET is used to identify the end of the offset list 342 * and in places where no such field exists. 343 */ 344#define VDESC_NO_OFFSET -1 345 346/* 347 * This structure describes the vnode operation taking place. 348 */ 349struct vnodeop_desc { 350 int vdesc_offset; /* offset in vector--first for speed */ 351 char *vdesc_name; /* a readable name for debugging */ 352 int vdesc_flags; /* VDESC_* flags */ 353 354 /* 355 * These ops are used by bypass routines to map and locate arguments. 356 * Creds and procs are not needed in bypass routines, but sometimes 357 * they are useful to (for example) transport layers. 358 * Nameidata is useful because it has a cred in it. 359 */ 360 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 361 int vdesc_vpp_offset; /* return vpp location */ 362 int vdesc_cred_offset; /* cred location, if any */ 363 int vdesc_proc_offset; /* proc location, if any */ 364 int vdesc_componentname_offset; /* if any */ 365 /* 366 * Finally, we've got a list of private data (about each operation) 367 * for each transport layer. (Support to manage this list is not 368 * yet part of BSD.) 369 */ 370 caddr_t *vdesc_transports; 371}; 372 373#ifdef _KERNEL 374/* 375 * A list of all the operation descs. 376 */ 377extern struct vnodeop_desc *vnodeop_descs[]; 378 379/* 380 * Interlock for scanning list of vnodes attached to a mountpoint 381 */ 382extern struct simplelock mntvnode_slock; 383 384/* 385 * This macro is very helpful in defining those offsets in the vdesc struct. 386 * 387 * This is stolen from X11R4. I ignored all the fancy stuff for 388 * Crays, so if you decide to port this to such a serious machine, 389 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 390 */ 391#define VOPARG_OFFSET(p_type,field) \ 392 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 393#define VOPARG_OFFSETOF(s_type,field) \ 394 VOPARG_OFFSET(s_type*,field) 395#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 396 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 397 398 399/* 400 * This structure is used to configure the new vnodeops vector. 401 */ 402struct vnodeopv_entry_desc { 403 struct vnodeop_desc *opve_op; /* which operation this is */ 404 vop_t *opve_impl; /* code implementing this operation */ 405}; 406struct vnodeopv_desc { 407 /* ptr to the ptr to the vector where op should go */ 408 vop_t ***opv_desc_vector_p; 409 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 410}; 411 412/* 413 * A generic structure. 414 * This can be used by bypass routines to identify generic arguments. 415 */ 416struct vop_generic_args { 417 struct vnodeop_desc *a_desc; 418 /* other random data follows, presumably */ 419}; 420 421 422#ifdef DEBUG_VFS_LOCKS 423/* 424 * Macros to aid in tracing VFS locking problems. Not totally 425 * reliable since if the process sleeps between changing the lock 426 * state and checking it with the assert, some other process could 427 * change the state. They are good enough for debugging a single 428 * filesystem using a single-threaded test. I find that 'cvs co src' 429 * is a pretty good test. 430 */ 431 432/* 433 * [dfr] Kludge until I get around to fixing all the vfs locking. 434 */ 435#define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \ 436 || (vp)->v_tag == VT_MFS \ 437 || (vp)->v_tag == VT_NFS \ 438 || (vp)->v_tag == VT_LFS \ 439 || (vp)->v_tag == VT_ISOFS \ 440 || (vp)->v_tag == VT_MSDOSFS \ 441 || (vp)->v_tag == VT_DEVFS) 442 443#define ASSERT_VOP_LOCKED(vp, str) \ 444do { \ 445 struct vnode *_vp = (vp); \ 446 \ 447 if (_vp && IS_LOCKING_VFS(_vp) && !VOP_ISLOCKED(_vp, NULL)) \ 448 panic("%s: %p is not locked but should be", str, _vp); \ 449} while (0) 450 451#define ASSERT_VOP_UNLOCKED(vp, str) \ 452do { \ 453 struct vnode *_vp = (vp); \ 454 int lockstate; \ 455 \ 456 if (_vp && IS_LOCKING_VFS(_vp)) { \ 457 lockstate = VOP_ISLOCKED(_vp, curproc); \ 458 if (lockstate == LK_EXCLUSIVE) \ 459 panic("%s: %p is locked but should not be", \ 460 str, _vp); \ 461 } \ 462} while (0) 463 464#define ASSERT_VOP_ELOCKED(vp, str) \ 465do { \ 466 struct vnode *_vp = (vp); \ 467 \ 468 if (_vp && IS_LOCKING_VFS(_vp) && \ 469 VOP_ISLOCKED(_vp, curproc) != LK_EXCLUSIVE) \ 470 panic("%s: %p is not exclusive locked but should be", \ 471 str, _vp); \ 472} while (0) 473 474#define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 475do { \ 476 struct vnode *_vp = (vp); \ 477 \ 478 if (_vp && IS_LOCKING_VFS(_vp) && \ 479 VOP_ISLOCKED(_vp, curproc) != LK_EXCLOTHER) \ 480 panic("%s: %p is not exclusive locked by another proc", \ 481 str, _vp); \ 482} while (0) 483 484#define ASSERT_VOP_SLOCKED(vp, str) \ 485do { \ 486 struct vnode *_vp = (vp); \ 487 \ 488 if (_vp && IS_LOCKING_VFS(_vp) && \ 489 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \ 490 panic("%s: %p is not locked shared but should be", \ 491 str, _vp); \ 492} while (0) 493 494#else 495 496#define ASSERT_VOP_LOCKED(vp, str) 497#define ASSERT_VOP_UNLOCKED(vp, str) 498 499#endif 500 501/* 502 * VOCALL calls an op given an ops vector. We break it out because BSD's 503 * vclean changes the ops vector and then wants to call ops with the old 504 * vector. 505 */ 506#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 507 508/* 509 * This call works for vnodes in the kernel. 510 */ 511#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 512#define VDESC(OP) (& __CONCAT(OP,_desc)) 513#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 514 515/* 516 * VMIO support inline 517 */ 518 519extern int vmiodirenable; 520 521static __inline int 522vn_canvmio(struct vnode *vp) 523{ 524 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 525 return(TRUE); 526 return(FALSE); 527} 528 529/* 530 * Finally, include the default set of vnode operations. 531 */ 532#include "vnode_if.h" 533 534/* 535 * Public vnode manipulation functions. 536 */ 537struct componentname; 538struct file; 539struct mount; 540struct nameidata; 541struct ostat; 542struct proc; 543struct stat; 544struct nstat; 545struct ucred; 546struct uio; 547struct vattr; 548struct vnode; 549struct vop_bwrite_args; 550 551extern int (*lease_check_hook) __P((struct vop_lease_args *)); 552 553void addalias __P((struct vnode *vp, dev_t nvp_rdev)); 554void addaliasu __P((struct vnode *vp, udev_t nvp_rdev)); 555int bdevvp __P((dev_t dev, struct vnode **vpp)); 556/* cache_* may belong in namei.h. */ 557void cache_enter __P((struct vnode *dvp, struct vnode *vp, 558 struct componentname *cnp)); 559int cache_lookup __P((struct vnode *dvp, struct vnode **vpp, 560 struct componentname *cnp)); 561void cache_purge __P((struct vnode *vp)); 562void cache_purgevfs __P((struct mount *mp)); 563void cvtstat __P((struct stat *st, struct ostat *ost)); 564void cvtnstat __P((struct stat *sb, struct nstat *nsb)); 565int getnewvnode __P((enum vtagtype tag, 566 struct mount *mp, vop_t **vops, struct vnode **vpp)); 567int lease_check __P((struct vop_lease_args *ap)); 568int spec_vnoperate __P((struct vop_generic_args *)); 569int speedup_syncer __P((void)); 570void vattr_null __P((struct vattr *vap)); 571int vcount __P((struct vnode *vp)); 572void vdrop __P((struct vnode *)); 573int vfinddev __P((dev_t dev, enum vtype type, struct vnode **vpp)); 574void vfs_add_vnodeops __P((const void *)); 575void vfs_rm_vnodeops __P((const void *)); 576int vflush __P((struct mount *mp, struct vnode *skipvp, int flags)); 577int vget __P((struct vnode *vp, int lockflag, struct proc *p)); 578void vgone __P((struct vnode *vp)); 579void vgonel __P((struct vnode *vp, struct proc *p)); 580void vhold __P((struct vnode *)); 581int vinvalbuf __P((struct vnode *vp, int save, struct ucred *cred, 582 583 struct proc *p, int slpflag, int slptimeo)); 584int vtruncbuf __P((struct vnode *vp, struct ucred *cred, struct proc *p, 585 off_t length, int blksize)); 586void vprint __P((char *label, struct vnode *vp)); 587int vrecycle __P((struct vnode *vp, struct simplelock *inter_lkp, 588 struct proc *p)); 589int vn_close __P((struct vnode *vp, 590 int flags, struct ucred *cred, struct proc *p)); 591int vn_isdisk __P((struct vnode *vp, int *errp)); 592int vn_lock __P((struct vnode *vp, int flags, struct proc *p)); 593#ifdef DEBUG_LOCKS 594int debug_vn_lock __P((struct vnode *vp, int flags, struct proc *p, 595 const char *filename, int line)); 596#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 597#endif 598int vn_open __P((struct nameidata *ndp, int fmode, int cmode)); 599void vn_pollevent __P((struct vnode *vp, int events)); 600void vn_pollgone __P((struct vnode *vp)); 601int vn_pollrecord __P((struct vnode *vp, struct proc *p, int events)); 602int vn_rdwr __P((enum uio_rw rw, struct vnode *vp, caddr_t base, 603 int len, off_t offset, enum uio_seg segflg, int ioflg, 604 struct ucred *cred, int *aresid, struct proc *p)); 605int vn_stat __P((struct vnode *vp, struct stat *sb, struct proc *p)); 606dev_t vn_todev __P((struct vnode *vp)); 607int vfs_cache_lookup __P((struct vop_lookup_args *ap)); 608int vfs_object_create __P((struct vnode *vp, struct proc *p, 609 struct ucred *cred)); 610void vfs_timestamp __P((struct timespec *)); 611int vn_writechk __P((struct vnode *vp)); 612int vop_stdbwrite __P((struct vop_bwrite_args *ap)); 613int vop_stdislocked __P((struct vop_islocked_args *)); 614int vop_stdlock __P((struct vop_lock_args *)); 615int vop_stdunlock __P((struct vop_unlock_args *)); 616int vop_noislocked __P((struct vop_islocked_args *)); 617int vop_nolock __P((struct vop_lock_args *)); 618int vop_nopoll __P((struct vop_poll_args *)); 619int vop_nounlock __P((struct vop_unlock_args *)); 620int vop_stdpathconf __P((struct vop_pathconf_args *)); 621int vop_stdpoll __P((struct vop_poll_args *)); 622int vop_revoke __P((struct vop_revoke_args *)); 623int vop_sharedlock __P((struct vop_lock_args *)); 624int vop_eopnotsupp __P((struct vop_generic_args *ap)); 625int vop_ebadf __P((struct vop_generic_args *ap)); 626int vop_einval __P((struct vop_generic_args *ap)); 627int vop_enotty __P((struct vop_generic_args *ap)); 628int vop_defaultop __P((struct vop_generic_args *ap)); 629int vop_null __P((struct vop_generic_args *ap)); 630int vop_panic __P((struct vop_generic_args *ap)); 631 632void vput __P((struct vnode *vp)); 633void vrele __P((struct vnode *vp)); 634void vref __P((struct vnode *vp)); 635void vbusy __P((struct vnode *vp)); 636 637extern vop_t **default_vnodeop_p; 638extern vop_t **spec_vnodeop_p; 639 640extern TAILQ_HEAD(tobefreelist, vnode) 641 vnode_tobefree_list; /* vnode free list */ 642 643#endif /* _KERNEL */ 644 645#endif /* !_SYS_VNODE_H_ */ 646