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 1.21 2004/08/28 19:02:07 dillon Exp $ 36 */ 37 38 #ifndef _SYS_VNODE_H_ 39 #define _SYS_VNODE_H_ 40 41 #include <sys/queue.h> 42 #include <sys/lock.h> 43 #include <sys/select.h> 44 #include <sys/uio.h> 45 #include <sys/acl.h> 46 #include <sys/namecache.h> 47 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 48 #include <sys/thread.h> 49 #endif 50 #include <sys/vfsops.h> 51 #include <sys/vfscache.h> 52 53 #include <machine/lock.h> 54 55 /* 56 * The vnode is the focus of all file activity in UNIX. There is a 57 * unique vnode allocated for each active file, each current directory, 58 * each mounted-on file, text file, and the root. 59 */ 60 61 /* 62 * Each underlying filesystem allocates its own private area and hangs 63 * it from v_data. If non-null, this area is freed in getnewvnode(). 64 */ 65 TAILQ_HEAD(buflists, buf); 66 67 68 /* 69 * Reading or writing any of these items requires holding the appropriate lock. 70 * v_freelist is locked by the global vnode_free_list token. 71 * v_mntvnodes is locked by the global mntvnodes token. 72 * v_flag, v_usecount, v_holdcount and v_writecount are 73 * locked by the v_interlock token. 74 * v_pollinfo is locked by the lock contained inside it. 75 * 76 * NOTE: XXX v_opencount currently only used by specfs. It should be used 77 * universally. 78 * 79 * NOTE: The v_vnlock pointer is now an embedded lock structure, v_lock. 80 * v_lock is currently locked exclusively for writes but when a 81 * range lock is added later on it will be locked shared for writes 82 * and a range will be exclusively reserved in the rangelock space. 83 * v_lock is currently locked exclusively for directory modifying 84 * operations but when we start locking namespaces it will no longer 85 * be used for that function, only for the actual I/O on the directory. 86 */ 87 struct vnode { 88 u_long v_flag; /* vnode flags (see below) */ 89 int v_usecount; /* reference count of users */ 90 int v_writecount; /* reference count of writers */ 91 int v_holdcnt; /* page & buffer references */ 92 int v_opencount; /* number of explicit opens */ 93 u_long v_id; /* capability identifier */ 94 struct mount *v_mount; /* ptr to vfs we are in */ 95 struct vop_ops *v_ops; /* mount, vops, other things */ 96 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 97 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ 98 struct buflists v_cleanblkhd; /* clean blocklist head */ 99 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 100 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 101 long v_numoutput; /* num of writes in progress */ 102 enum vtype v_type; /* vnode type */ 103 union { 104 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 105 struct socket *vu_socket; /* unix ipc (VSOCK) */ 106 struct { 107 udev_t vu_udev; /* device number for attach */ 108 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 109 SLIST_ENTRY(vnode) vu_specnext; 110 } vu_spec; 111 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 112 } v_un; 113 struct nqlease *v_lease; /* Soft reference to lease */ 114 daddr_t v_lastw; /* last write (write cluster) */ 115 daddr_t v_cstart; /* start block of cluster */ 116 daddr_t v_lasta; /* last allocation */ 117 int v_clen; /* length of current cluster */ 118 struct vm_object *v_object; /* Place to store VM object */ 119 lwkt_token_t v_interlock; /* lock on usecount and flag */ 120 struct lock v_lock; /* file/dir ops lock */ 121 enum vtagtype v_tag; /* type of underlying data */ 122 void *v_data; /* private data for fs */ 123 struct namecache_list v_namecache; /* associated nc entries */ 124 struct { 125 struct lwkt_token vpi_token; /* lock to protect below */ 126 struct selinfo vpi_selinfo; /* identity of poller(s) */ 127 short vpi_events; /* what they are looking for */ 128 short vpi_revents; /* what has happened */ 129 } v_pollinfo; 130 struct thread *v_vxthread; /* thread owning VXLOCK */ 131 struct vmresident *v_resident; /* optional vmresident */ 132 #ifdef DEBUG_LOCKS 133 const char *filename; /* Source file doing locking */ 134 int line; /* Line number doing locking */ 135 #endif 136 }; 137 #define v_mountedhere v_un.vu_mountedhere 138 #define v_socket v_un.vu_socket 139 #define v_udev v_un.vu_spec.vu_udev 140 #define v_rdev v_un.vu_spec.vu_specinfo 141 #define v_specnext v_un.vu_spec.vu_specnext 142 #define v_fifoinfo v_un.vu_fifoinfo 143 144 #define VN_POLLEVENT(vp, events) \ 145 do { \ 146 if ((vp)->v_pollinfo.vpi_events & (events)) \ 147 vn_pollevent((vp), (events)); \ 148 } while (0) 149 150 /* 151 * Vnode flags. 152 */ 153 #define VROOT 0x00001 /* root of its file system */ 154 #define VTEXT 0x00002 /* vnode is a pure text prototype */ 155 #define VSYSTEM 0x00004 /* vnode being used by kernel */ 156 #define VISTTY 0x00008 /* vnode represents a tty */ 157 #define VXLOCK 0x00100 /* vnode is locked to change underlying type */ 158 #define VXWANT 0x00200 /* process is waiting for vnode */ 159 #define VBWAIT 0x00400 /* waiting for output to complete */ 160 /* open for business 0x00800 */ 161 /* open for business 0x01000 */ 162 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 163 /* open for business 0x04000 */ 164 #define VAGE 0x08000 /* Insert vnode at head of free list */ 165 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 166 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */ 167 #define VDOOMED 0x40000 /* This vnode is being recycled */ 168 #define VFREE 0x80000 /* This vnode is on the freelist */ 169 #define VINFREE 0x100000 /* This vnode is in the midst of being freed */ 170 #define VONWORKLST 0x200000 /* On syncer work-list */ 171 #define VMOUNT 0x400000 /* Mount in progress */ 172 #define VOBJDIRTY 0x800000 /* object might be dirty */ 173 #define VPLACEMARKER 0x1000000 /* dummy vnode placemarker */ 174 175 /* 176 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 177 * help with write clustering) 178 */ 179 #define IO_UNIT 0x0001 /* do I/O as atomic unit */ 180 #define IO_APPEND 0x0002 /* append write to end */ 181 #define IO_SYNC 0x0004 /* do I/O synchronously */ 182 #define IO_NODELOCKED 0x0008 /* underlying node already locked */ 183 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 184 #define IO_VMIO 0x0020 /* data already in VMIO space */ 185 #define IO_INVAL 0x0040 /* invalidate after I/O */ 186 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 187 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 188 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */ 189 #define IO_CORE 0x0400 /* I/O is part of core dump */ 190 191 #define IO_SEQMAX 0x7F /* seq heuristic max value */ 192 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 193 194 /* 195 * Modes. Some values same as Ixxx entries from inode.h for now. 196 */ 197 #define VSUID 04000 /* set user id on execution */ 198 #define VSGID 02000 /* set group id on execution */ 199 #define VSVTX 01000 /* save swapped text even after use */ 200 #define VREAD 00400 /* read, write, execute permissions */ 201 #define VWRITE 00200 202 #define VEXEC 00100 203 204 /* 205 * Token indicating no attribute value yet assigned. 206 */ 207 #define VNOVAL (-1) 208 209 /* 210 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 211 */ 212 #define VLKTIMEOUT (hz / 20 + 1) 213 214 #ifdef _KERNEL 215 216 #ifdef MALLOC_DECLARE 217 MALLOC_DECLARE(M_VNODE); 218 #endif 219 220 /* 221 * Convert between vnode types and inode formats (since POSIX.1 222 * defines mode word of stat structure in terms of inode formats). 223 */ 224 extern enum vtype iftovt_tab[]; 225 extern int vttoif_tab[]; 226 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 227 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 228 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 229 230 /* 231 * Flags to various vnode functions. 232 */ 233 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 234 #define FORCECLOSE 0x0002 /* vflush: force file closure */ 235 #define WRITECLOSE 0x0004 /* vflush: only close writable files */ 236 #define DOCLOSE 0x0008 /* vclean: close active files */ 237 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 238 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 239 240 #ifdef DIAGNOSTIC 241 #define VATTR_NULL(vap) vattr_null(vap) 242 #else 243 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 244 #endif /* DIAGNOSTIC */ 245 246 #define NULLVP ((struct vnode *)NULL) 247 248 #define VNODEOP_SET(f) \ 249 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops_sysinit, &f); \ 250 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_rm_vnodeops_sysinit, &f); 251 252 /* 253 * Global vnode data. 254 */ 255 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 256 extern int desiredvnodes; /* number of vnodes desired */ 257 extern time_t syncdelay; /* max time to delay syncing data */ 258 extern time_t filedelay; /* time to delay syncing files */ 259 extern time_t dirdelay; /* time to delay syncing directories */ 260 extern time_t metadelay; /* time to delay syncing metadata */ 261 extern struct vm_zone *namei_zone; 262 extern int prtactive; /* nonzero to call vprint() */ 263 extern struct vattr va_null; /* predefined null vattr structure */ 264 extern int vfs_ioopt; 265 266 /* 267 * Macro/function to check for client cache inconsistency w.r.t. leasing. 268 */ 269 #define LEASE_READ 0x1 /* Check lease for readers */ 270 #define LEASE_WRITE 0x2 /* Check lease for modifiers */ 271 272 273 extern void (*lease_updatetime) (int deltat); 274 275 #define VI_LOCK(vlock, vp) lwkt_gettoken(vlock, (vp)->v_interlock) 276 #define VI_UNLOCK(vlock, vp) lwkt_reltoken(vlock) 277 278 #endif /* _KERNEL */ 279 280 /* 281 * Mods for extensibility. 282 */ 283 284 /* 285 * Flags for vdesc_flags: 286 */ 287 #define VDESC_MAX_VPS 8 288 /* Low order 8 flag bits are reserved for willrele flags for vp arguments. */ 289 #define VDESC_VP0_WILLRELE 0x00000001 290 #define VDESC_VP1_WILLRELE 0x00000002 291 #define VDESC_VP2_WILLRELE 0x00000004 292 #define VDESC_VP3_WILLRELE 0x00000008 293 #define VDESC_VP4_WILLRELE 0x00000010 294 #define VDESC_VP5_WILLRELE 0x00000020 295 #define VDESC_VP6_WILLRELE 0x00000040 296 #define VDESC_VP7_WILLRELE 0x00000080 297 #define VDESC_NOMAP_VPP 0x00000100 298 #define VDESC_VPP_WILLRELE 0x00000200 299 #define VDESC_VP0_WILLUNLOCK 0x00010000 300 #define VDESC_VP1_WILLUNLOCK 0x00020000 301 #define VDESC_VP2_WILLUNLOCK 0x00040000 302 #define VDESC_VP3_WILLUNLOCK 0x00080000 303 #define VDESC_VP4_WILLUNLOCK 0x00100000 304 #define VDESC_VP5_WILLUNLOCK 0x00200000 305 #define VDESC_VP6_WILLUNLOCK 0x00400000 306 #define VDESC_VP7_WILLUNLOCK 0x00800000 307 308 /* 309 * VDESC_NO_OFFSET is used to identify the end of the offset list 310 * and in places where no such field exists. 311 */ 312 #define VDESC_NO_OFFSET -1 313 314 /* 315 * This structure describes the vnode operation taking place. 316 */ 317 struct vnodeop_desc { 318 int vdesc_offset; /* offset in vector--first for speed */ 319 char *vdesc_name; /* a readable name for debugging */ 320 int vdesc_flags; /* VDESC_* flags */ 321 322 /* 323 * These ops are used by bypass routines to map and locate arguments. 324 * Creds and procs are not needed in bypass routines, but sometimes 325 * they are useful to (for example) transport layers. 326 * Nameidata is useful because it has a cred in it. 327 */ 328 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 329 int vdesc_vpp_offset; /* return vpp location */ 330 int vdesc_cred_offset; /* cred location, if any */ 331 int vdesc_proc_offset; /* proc location, if any */ 332 int vdesc_componentname_offset; /* if any */ 333 }; 334 335 #ifdef _KERNEL 336 /* 337 * A list of all the operation descs. 338 */ 339 extern struct vnodeop_desc *vnodeop_descs[]; 340 341 /* 342 * Interlock for scanning list of vnodes attached to a mountpoint 343 */ 344 extern struct lwkt_token mntvnode_token; 345 346 /* 347 * This macro is very helpful in defining those offsets in the vdesc struct. 348 * 349 * This is stolen from X11R4. I ignored all the fancy stuff for 350 * Crays, so if you decide to port this to such a serious machine, 351 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 352 */ 353 #define VOPARG_OFFSET(p_type,field) \ 354 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 355 #define VOPARG_OFFSETOF(s_type,field) \ 356 VOPARG_OFFSET(s_type*,field) 357 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 358 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 359 360 361 /* 362 * This structure is used to configure the new vnodeops vector. The entry 363 * descriptor describes a patricular VOP function while the operations 364 * vector descriptor recursively describes arrays of entry descriptors. 365 */ 366 struct vnodeopv_entry_desc { 367 struct vnodeop_desc *opve_op; 368 int (*opve_func)(struct vop_generic_args *ap); 369 }; 370 371 struct vnodeopv_desc { 372 struct vop_ops **opv_desc_vector; /* vect to allocate/fill*/ 373 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 374 }; 375 376 struct vnodeopv_node { 377 TAILQ_ENTRY(vnodeopv_node) entry; 378 struct vop_ops *ops; /* allocated vector */ 379 struct vnodeopv_entry_desc *descs; /* null terminated list */ 380 }; 381 382 #ifdef DEBUG_VFS_LOCKS 383 /* 384 * Macros to aid in tracing VFS locking problems. Not totally 385 * reliable since if the process sleeps between changing the lock 386 * state and checking it with the assert, some other process could 387 * change the state. They are good enough for debugging a single 388 * filesystem using a single-threaded test. I find that 'cvs co src' 389 * is a pretty good test. 390 */ 391 392 /* 393 * [dfr] Kludge until I get around to fixing all the vfs locking. 394 */ 395 #define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \ 396 || (vp)->v_tag == VT_MFS \ 397 || (vp)->v_tag == VT_NFS \ 398 || (vp)->v_tag == VT_LFS \ 399 || (vp)->v_tag == VT_ISOFS \ 400 || (vp)->v_tag == VT_MSDOSFS) 401 402 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked(vp, str) 403 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked(vp, str); 404 405 #define ASSERT_VOP_ELOCKED(vp, str) \ 406 do { \ 407 struct vnode *_vp = (vp); \ 408 \ 409 if (_vp && IS_LOCKING_VFS(_vp) && \ 410 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \ 411 panic("%s: %p is not exclusive locked but should be", \ 412 str, _vp); \ 413 } while (0) 414 415 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 416 do { \ 417 struct vnode *_vp = (vp); \ 418 \ 419 if (_vp && IS_LOCKING_VFS(_vp) && \ 420 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \ 421 panic("%s: %p is not exclusive locked by another proc", \ 422 str, _vp); \ 423 } while (0) 424 425 #define ASSERT_VOP_SLOCKED(vp, str) \ 426 do { \ 427 struct vnode *_vp = (vp); \ 428 \ 429 if (_vp && IS_LOCKING_VFS(_vp) && \ 430 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \ 431 panic("%s: %p is not locked shared but should be", \ 432 str, _vp); \ 433 } while (0) 434 435 void assert_vop_locked(struct vnode *vp, const char *str); 436 void assert_vop_unlocked(struct vnode *vp, const char *str); 437 438 #else 439 440 #define ASSERT_VOP_LOCKED(vp, str) 441 #define ASSERT_VOP_UNLOCKED(vp, str) 442 443 #endif /* DEBUG_VFS_LOCKS */ 444 445 /* 446 * VOCALL calls an op given an ops vector. We break it out because BSD's 447 * vclean changes the ops vector and then wants to call ops with the old 448 * vector. 449 */ 450 451 typedef int (*vocall_func_t)(struct vop_generic_args *); 452 453 /* 454 * This call executes the vops vector for the offset stored in the ap's 455 * descriptor of the passed vops rather then the one related to the 456 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of 457 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops 458 * vector function). 459 */ 460 #define VOCALL(vops, ap) \ 461 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->vdesc_offset)))(ap) 462 463 #define VDESC(OP) (& __CONCAT(OP,_desc)) 464 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 465 466 /* 467 * VMIO support inline 468 */ 469 470 extern int vmiodirenable; 471 472 static __inline int 473 vn_canvmio(struct vnode *vp) 474 { 475 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 476 return(TRUE); 477 return(FALSE); 478 } 479 480 /* 481 * Public vnode manipulation functions. 482 */ 483 struct file; 484 struct mount; 485 struct nameidata; 486 struct ostat; 487 struct proc; 488 struct thread; 489 struct stat; 490 struct nstat; 491 struct ucred; 492 struct uio; 493 struct vattr; 494 struct vnode; 495 struct vop_bwrite_args; 496 497 extern int (*lease_check_hook) (struct vop_lease_args *); 498 499 void addaliasu (struct vnode *vp, udev_t nvp_udev); 500 int v_associate_rdev(struct vnode *vp, dev_t dev); 501 void v_release_rdev(struct vnode *vp); 502 int bdevvp (dev_t dev, struct vnode **vpp); 503 void cvtstat (struct stat *st, struct ostat *ost); 504 void cvtnstat (struct stat *sb, struct nstat *nsb); 505 int getnewvnode (enum vtagtype tag, struct mount *mp, struct vop_ops *ops, 506 struct vnode **vpp, int timo, int lkflags); 507 int lease_check (struct vop_lease_args *ap); 508 int spec_vnoperate (struct vop_generic_args *); 509 int speedup_syncer (void); 510 void vattr_null (struct vattr *vap); 511 int vcount (struct vnode *vp); 512 void vdrop (struct vnode *); 513 int vfinddev (dev_t dev, enum vtype type, struct vnode **vpp); 514 void vfs_add_vnodeops_sysinit (const void *); 515 void vfs_rm_vnodeops_sysinit (const void *); 516 void vfs_add_vnodeops(struct vop_ops **, struct vnodeopv_entry_desc *); 517 void vfs_rm_vnodeops(struct vop_ops **); 518 int vflush (struct mount *mp, int rootrefs, int flags); 519 int vmntvnodescan(struct mount *mp, 520 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data), 521 int (*slowfunc)(struct mount *mp, struct vnode *vp, lwkt_tokref_t vlock, 522 void *data), void *data); 523 524 int vget (struct vnode *vp, lwkt_tokref_t vlock, int lockflag, struct thread *td); 525 void vgone (struct vnode *vp); 526 void vgonel (struct vnode *vp, lwkt_tokref_t vlock, struct thread *td); 527 void vhold (struct vnode *); 528 int vinvalbuf (struct vnode *vp, int save, 529 struct thread *td, int slpflag, int slptimeo); 530 int vtruncbuf (struct vnode *vp, struct thread *td, 531 off_t length, int blksize); 532 void vprint (char *label, struct vnode *vp); 533 int vrecycle (struct vnode *vp, struct lwkt_tokref *inter_lkp, 534 struct thread *td); 535 int vn_close (struct vnode *vp, int flags, struct thread *td); 536 int vn_isdisk (struct vnode *vp, int *errp); 537 int vn_lock (struct vnode *vp, lwkt_tokref_t vlock, int flags, struct thread *td); 538 #ifdef DEBUG_LOCKS 539 int debug_vn_lock (struct vnode *vp, lwkt_tokref_t vlock, int flags, struct thread *td, 540 const char *filename, int line); 541 #define vn_lock(vp,vlock,flags,p) debug_vn_lock(vp,vlock,flags,p,__FILE__,__LINE__) 542 #endif 543 544 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf); 545 int vn_open (struct nameidata *ndp, int fmode, int cmode); 546 void vn_pollevent (struct vnode *vp, int events); 547 void vn_pollgone (struct vnode *vp); 548 int vn_pollrecord (struct vnode *vp, struct thread *td, int events); 549 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base, 550 int len, off_t offset, enum uio_seg segflg, int ioflg, 551 struct ucred *cred, int *aresid, struct thread *td); 552 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base, 553 int len, off_t offset, enum uio_seg segflg, int ioflg, 554 struct ucred *cred, int *aresid, struct thread *td); 555 int vn_stat (struct vnode *vp, struct stat *sb, struct thread *td); 556 dev_t vn_todev (struct vnode *vp); 557 int vfs_object_create (struct vnode *vp, struct thread *td); 558 void vfs_timestamp (struct timespec *); 559 int vn_writechk (struct vnode *vp); 560 int vop_stdbwrite (struct vop_bwrite_args *ap); 561 int vop_stdislocked (struct vop_islocked_args *ap); 562 int vop_stdlock (struct vop_lock_args *ap); 563 int vop_stdrlock (struct vop_lock_args *ap); 564 int vop_stdunlock (struct vop_unlock_args *ap); 565 int vop_nopoll (struct vop_poll_args *ap); 566 int vop_stdpathconf (struct vop_pathconf_args *ap); 567 int vop_stdpoll (struct vop_poll_args *ap); 568 int vop_stdrevoke (struct vop_revoke_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_stdcreatevobject (struct vop_createvobject_args *ap); 577 int vop_stddestroyvobject (struct vop_destroyvobject_args *ap); 578 int vop_stdgetvobject (struct vop_getvobject_args *ap); 579 580 void vput (struct vnode *vp); 581 void vrele (struct vnode *vp); 582 void vref (struct vnode *vp); 583 584 extern struct vop_ops *default_vnode_vops; 585 extern struct vop_ops *spec_vnode_vops; 586 extern struct vop_ops *dead_vnode_vops; 587 588 #endif /* _KERNEL */ 589 590 #endif /* !_SYS_VNODE_H_ */ 591