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 1.26 2004/11/12 00:09:27 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 struct lock v_lock; /* file/dir ops lock */ 120 enum vtagtype v_tag; /* type of underlying data */ 121 void *v_data; /* private data for fs */ 122 struct namecache_list v_namecache; /* associated nc entries */ 123 struct { 124 struct lwkt_token vpi_token; /* lock to protect below */ 125 struct selinfo vpi_selinfo; /* identity of poller(s) */ 126 short vpi_events; /* what they are looking for */ 127 short vpi_revents; /* what has happened */ 128 } v_pollinfo; 129 struct vmresident *v_resident; /* optional vmresident */ 130 #ifdef DEBUG_LOCKS 131 const char *filename; /* Source file doing locking */ 132 int line; /* Line number doing locking */ 133 #endif 134 void *v_xaddr; 135 }; 136 #define v_mountedhere v_un.vu_mountedhere 137 #define v_socket v_un.vu_socket 138 #define v_udev v_un.vu_spec.vu_udev 139 #define v_rdev v_un.vu_spec.vu_specinfo 140 #define v_specnext v_un.vu_spec.vu_specnext 141 #define v_fifoinfo v_un.vu_fifoinfo 142 143 #define VN_POLLEVENT(vp, events) \ 144 do { \ 145 if ((vp)->v_pollinfo.vpi_events & (events)) \ 146 vn_pollevent((vp), (events)); \ 147 } while (0) 148 149 /* 150 * Vnode flags. 151 */ 152 #define VROOT 0x00001 /* root of its file system */ 153 #define VTEXT 0x00002 /* vnode is a pure text prototype */ 154 #define VSYSTEM 0x00004 /* vnode being used by kernel */ 155 #define VISTTY 0x00008 /* vnode represents a tty */ 156 #define VCTTYISOPEN 0x00010 /* controlling terminal tty is open */ 157 /* open for business 0x00020 */ 158 /* open for business 0x00040 */ 159 /* open for business 0x00080 */ 160 /* open for business 0x00100 */ 161 /* open for business 0x00200 */ 162 #define VBWAIT 0x00400 /* waiting for output to complete */ 163 /* open for business 0x00800 */ 164 /* open for business 0x01000 */ 165 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 166 #define VINACTIVE 0x04000 /* The vnode is inactive */ 167 #define VAGE 0x08000 /* Insert vnode at head of free list */ 168 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 169 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */ 170 #define VRECLAIMED 0x40000 /* This vnode has been destroyed */ 171 #define VFREE 0x80000 /* This vnode is on the freelist */ 172 /* open for business 0x100000 */ 173 #define VONWORKLST 0x200000 /* On syncer work-list */ 174 #define VMOUNT 0x400000 /* Mount in progress */ 175 #define VOBJDIRTY 0x800000 /* object might be dirty */ 176 #define VPLACEMARKER 0x1000000 /* dummy vnode placemarker */ 177 178 /* 179 * vmntvnodescan() flags 180 */ 181 #define VMSC_GETVP 1 182 #define VMSC_GETVX 2 183 #define VMSC_REFVP 3 184 #define VMSC_NOWAIT 0x10 185 186 /* 187 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 188 * help with write clustering) 189 */ 190 #define IO_UNIT 0x0001 /* do I/O as atomic unit */ 191 #define IO_APPEND 0x0002 /* append write to end */ 192 #define IO_SYNC 0x0004 /* do I/O synchronously */ 193 #define IO_NODELOCKED 0x0008 /* underlying node already locked */ 194 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 195 #define IO_VMIO 0x0020 /* data already in VMIO space */ 196 #define IO_INVAL 0x0040 /* invalidate after I/O */ 197 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 198 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 199 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */ 200 #define IO_CORE 0x0400 /* I/O is part of core dump */ 201 202 #define IO_SEQMAX 0x7F /* seq heuristic max value */ 203 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 204 205 /* 206 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID, 207 * and SVTX flag bits. 208 * 209 * VCREATE, VDELETE, and VEXCL may only be used in naccess() calls. 210 */ 211 #define VDELETE 040000 /* delete if the file/dir exists */ 212 #define VCREATE 020000 /* create if the file/dir does not exist */ 213 #define VEXCL 010000 /* error if the file/dir already exists */ 214 215 #define VSUID 04000 /* set user id on execution */ 216 #define VSGID 02000 /* set group id on execution */ 217 #define VSVTX 01000 /* save swapped text even after use */ 218 #define VREAD 00400 /* read, write, execute permissions */ 219 #define VWRITE 00200 220 #define VEXEC 00100 221 222 /* 223 * Token indicating no attribute value yet assigned. 224 */ 225 #define VNOVAL (-1) 226 227 /* 228 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 229 */ 230 #define VLKTIMEOUT (hz / 20 + 1) 231 232 #ifdef _KERNEL 233 234 /* 235 * Convert between vnode types and inode formats (since POSIX.1 236 * defines mode word of stat structure in terms of inode formats). 237 */ 238 extern enum vtype iftovt_tab[]; 239 extern int vttoif_tab[]; 240 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 241 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 242 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 243 244 /* 245 * Flags to various vnode functions. 246 */ 247 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 248 #define FORCECLOSE 0x0002 /* vflush: force file closure */ 249 #define WRITECLOSE 0x0004 /* vflush: only close writable files */ 250 #define DOCLOSE 0x0008 /* vclean: close active files */ 251 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 252 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 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_sysinit, &f); \ 264 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_rm_vnodeops_sysinit, &f); 265 266 /* 267 * Global vnode data. 268 */ 269 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 270 extern struct namecache *rootncp; /* root (i.e. "/") namecache */ 271 extern int desiredvnodes; /* number of vnodes desired */ 272 extern time_t syncdelay; /* max time to delay syncing data */ 273 extern time_t filedelay; /* time to delay syncing files */ 274 extern time_t dirdelay; /* time to delay syncing directories */ 275 extern time_t metadelay; /* time to delay syncing metadata */ 276 extern struct vm_zone *namei_zone; 277 extern int prtactive; /* nonzero to call vprint() */ 278 extern struct vattr va_null; /* predefined null vattr structure */ 279 extern int vfs_ioopt; 280 extern int numvnodes; 281 extern int freevnodes; 282 extern int vfs_fastdev; /* fast specfs device access */ 283 284 /* 285 * Macro/function to check for client cache inconsistency w.r.t. leasing. 286 */ 287 #define LEASE_READ 0x1 /* Check lease for readers */ 288 #define LEASE_WRITE 0x2 /* Check lease for modifiers */ 289 290 291 extern void (*lease_updatetime) (int deltat); 292 293 #endif /* _KERNEL */ 294 295 /* 296 * Mods for extensibility. 297 */ 298 299 /* 300 * Flags for vdesc_flags: 301 */ 302 #define VDESC_MAX_VPS 8 303 /* Low order 8 flag bits are reserved for willrele flags for vp arguments. */ 304 #define VDESC_VP0_WILLRELE 0x00000001 305 #define VDESC_VP1_WILLRELE 0x00000002 306 #define VDESC_VP2_WILLRELE 0x00000004 307 #define VDESC_VP3_WILLRELE 0x00000008 308 #define VDESC_VP4_WILLRELE 0x00000010 309 #define VDESC_VP5_WILLRELE 0x00000020 310 #define VDESC_VP6_WILLRELE 0x00000040 311 #define VDESC_VP7_WILLRELE 0x00000080 312 #define VDESC_NOMAP_VPP 0x00000100 313 #define VDESC_VPP_WILLRELE 0x00000200 314 #define VDESC_VP0_WILLUNLOCK 0x00010000 315 #define VDESC_VP1_WILLUNLOCK 0x00020000 316 #define VDESC_VP2_WILLUNLOCK 0x00040000 317 #define VDESC_VP3_WILLUNLOCK 0x00080000 318 #define VDESC_VP4_WILLUNLOCK 0x00100000 319 #define VDESC_VP5_WILLUNLOCK 0x00200000 320 #define VDESC_VP6_WILLUNLOCK 0x00400000 321 #define VDESC_VP7_WILLUNLOCK 0x00800000 322 323 /* 324 * VDESC_NO_OFFSET is used to identify the end of the offset list 325 * and in places where no such field exists. 326 */ 327 #define VDESC_NO_OFFSET -1 328 329 /* 330 * This structure describes the vnode operation taking place. 331 */ 332 struct vnodeop_desc { 333 int vdesc_offset; /* offset in vector--first for speed */ 334 char *vdesc_name; /* a readable name for debugging */ 335 int vdesc_flags; /* VDESC_* flags */ 336 337 /* 338 * These ops are used by bypass routines to map and locate arguments. 339 * Creds and procs are not needed in bypass routines, but sometimes 340 * they are useful to (for example) transport layers. 341 * Nameidata is useful because it has a cred in it. 342 */ 343 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 344 int vdesc_vpp_offset; /* return vpp location */ 345 int vdesc_cred_offset; /* cred location, if any */ 346 int vdesc_proc_offset; /* proc location, if any */ 347 int vdesc_componentname_offset; /* if any */ 348 }; 349 350 #ifdef _KERNEL 351 /* 352 * A list of all the operation descs. 353 */ 354 extern struct vnodeop_desc *vnodeop_descs[]; 355 356 /* 357 * Interlock for scanning list of vnodes attached to a mountpoint 358 */ 359 extern struct lwkt_token mntvnode_token; 360 361 /* 362 * This macro is very helpful in defining those offsets in the vdesc struct. 363 * 364 * This is stolen from X11R4. I ignored all the fancy stuff for 365 * Crays, so if you decide to port this to such a serious machine, 366 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 367 */ 368 #define VOPARG_OFFSET(p_type,field) \ 369 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 370 #define VOPARG_OFFSETOF(s_type,field) \ 371 VOPARG_OFFSET(s_type*,field) 372 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 373 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 374 375 376 /* 377 * This structure is used to configure the new vnodeops vector. The entry 378 * descriptor describes a patricular VOP function while the operations 379 * vector descriptor recursively describes arrays of entry descriptors. 380 */ 381 struct vnodeopv_entry_desc { 382 struct vnodeop_desc *opve_op; 383 int (*opve_func)(struct vop_generic_args *ap); 384 }; 385 386 struct vnodeopv_desc { 387 struct vop_ops **opv_desc_vector; /* vect to allocate/fill*/ 388 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 389 }; 390 391 struct vnodeopv_node { 392 TAILQ_ENTRY(vnodeopv_node) entry; 393 struct vop_ops *ops; /* allocated vector */ 394 struct vnodeopv_entry_desc *descs; /* null terminated list */ 395 }; 396 397 #ifdef DEBUG_VFS_LOCKS 398 /* 399 * Macros to aid in tracing VFS locking problems. Not totally 400 * reliable since if the process sleeps between changing the lock 401 * state and checking it with the assert, some other process could 402 * change the state. They are good enough for debugging a single 403 * filesystem using a single-threaded test. I find that 'cvs co src' 404 * is a pretty good test. 405 */ 406 407 /* 408 * [dfr] Kludge until I get around to fixing all the vfs locking. 409 */ 410 #define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \ 411 || (vp)->v_tag == VT_MFS \ 412 || (vp)->v_tag == VT_NFS \ 413 || (vp)->v_tag == VT_LFS \ 414 || (vp)->v_tag == VT_ISOFS \ 415 || (vp)->v_tag == VT_MSDOSFS) 416 417 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked(vp, str) 418 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked(vp, str); 419 420 #define ASSERT_VOP_ELOCKED(vp, str) \ 421 do { \ 422 struct vnode *_vp = (vp); \ 423 \ 424 if (_vp && IS_LOCKING_VFS(_vp) && \ 425 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \ 426 panic("%s: %p is not exclusive locked but should be", \ 427 str, _vp); \ 428 } while (0) 429 430 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 431 do { \ 432 struct vnode *_vp = (vp); \ 433 \ 434 if (_vp && IS_LOCKING_VFS(_vp) && \ 435 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \ 436 panic("%s: %p is not exclusive locked by another proc", \ 437 str, _vp); \ 438 } while (0) 439 440 #define ASSERT_VOP_SLOCKED(vp, str) \ 441 do { \ 442 struct vnode *_vp = (vp); \ 443 \ 444 if (_vp && IS_LOCKING_VFS(_vp) && \ 445 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \ 446 panic("%s: %p is not locked shared but should be", \ 447 str, _vp); \ 448 } while (0) 449 450 void assert_vop_locked(struct vnode *vp, const char *str); 451 void assert_vop_unlocked(struct vnode *vp, const char *str); 452 453 #else 454 455 #define ASSERT_VOP_LOCKED(vp, str) 456 #define ASSERT_VOP_UNLOCKED(vp, str) 457 458 #endif /* DEBUG_VFS_LOCKS */ 459 460 /* 461 * VOCALL calls an op given an ops vector. We break it out because BSD's 462 * vclean changes the ops vector and then wants to call ops with the old 463 * vector. 464 */ 465 466 typedef int (*vocall_func_t)(struct vop_generic_args *); 467 468 /* 469 * This call executes the vops vector for the offset stored in the ap's 470 * descriptor of the passed vops rather then the one related to the 471 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of 472 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops 473 * vector function). 474 */ 475 #define VOCALL(vops, ap) \ 476 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->vdesc_offset)))(ap) 477 478 #define VDESC(OP) (& __CONCAT(OP,_desc)) 479 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 480 481 /* 482 * VMIO support inline 483 */ 484 485 extern int vmiodirenable; 486 487 static __inline int 488 vn_canvmio(struct vnode *vp) 489 { 490 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 491 return(TRUE); 492 return(FALSE); 493 } 494 495 /* 496 * Public vnode manipulation functions. 497 */ 498 struct file; 499 struct mount; 500 struct nlookupdata; 501 struct ostat; 502 struct proc; 503 struct thread; 504 struct stat; 505 struct nstat; 506 struct ucred; 507 struct uio; 508 struct vattr; 509 struct vnode; 510 struct vop_bwrite_args; 511 512 extern int (*lease_check_hook) (struct vop_lease_args *); 513 514 void addaliasu (struct vnode *vp, udev_t nvp_udev); 515 int v_associate_rdev(struct vnode *vp, dev_t dev); 516 void v_release_rdev(struct vnode *vp); 517 int bdevvp (dev_t dev, struct vnode **vpp); 518 void cvtstat (struct stat *st, struct ostat *ost); 519 void cvtnstat (struct stat *sb, struct nstat *nsb); 520 struct vnode *allocvnode(int lktimeout, int lkflags); 521 struct vnode *allocvnode_placemarker(void); 522 void freevnode_placemarker(struct vnode *); 523 int getnewvnode (enum vtagtype tag, struct mount *mp, struct vop_ops *ops, 524 struct vnode **vpp, int timo, int lkflags); 525 int lease_check (struct vop_lease_args *ap); 526 int spec_vnoperate (struct vop_generic_args *); 527 int speedup_syncer (void); 528 void vattr_null (struct vattr *vap); 529 int vcount (struct vnode *vp); 530 int vfinddev (dev_t dev, enum vtype type, struct vnode **vpp); 531 void vfs_add_vnodeops_sysinit (const void *); 532 void vfs_rm_vnodeops_sysinit (const void *); 533 void vfs_add_vnodeops(struct vop_ops **, struct vnodeopv_entry_desc *); 534 void vfs_rm_vnodeops(struct vop_ops **); 535 int vflush (struct mount *mp, int rootrefs, int flags); 536 int vmntvnodescan(struct mount *mp, int flags, 537 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data), 538 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data), 539 void *data); 540 void insmntque(struct vnode *vp, struct mount *mp); 541 542 void vclean (struct vnode *vp, int flags, struct thread *td); 543 void vgone (struct vnode *vp); 544 int vinvalbuf (struct vnode *vp, int save, 545 struct thread *td, int slpflag, int slptimeo); 546 int vtruncbuf (struct vnode *vp, struct thread *td, 547 off_t length, int blksize); 548 void vprint (char *label, struct vnode *vp); 549 int vrecycle (struct vnode *vp, struct thread *td); 550 int vn_close (struct vnode *vp, int flags, struct thread *td); 551 int vn_isdisk (struct vnode *vp, int *errp); 552 int vn_lock (struct vnode *vp, int flags, struct thread *td); 553 #ifdef DEBUG_LOCKS 554 int debug_vn_lock (struct vnode *vp, int flags, struct thread *td, 555 const char *filename, int line); 556 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 557 #endif 558 559 void vn_setspecops (struct file *fp); 560 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf); 561 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode); 562 void vn_pollevent (struct vnode *vp, int events); 563 void vn_pollgone (struct vnode *vp); 564 int vn_pollrecord (struct vnode *vp, struct thread *td, int events); 565 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base, 566 int len, off_t offset, enum uio_seg segflg, int ioflg, 567 struct ucred *cred, int *aresid, struct thread *td); 568 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base, 569 int len, off_t offset, enum uio_seg segflg, int ioflg, 570 struct ucred *cred, int *aresid, struct thread *td); 571 int vn_stat (struct vnode *vp, struct stat *sb, struct thread *td); 572 dev_t vn_todev (struct vnode *vp); 573 int vfs_object_create (struct vnode *vp, struct thread *td); 574 void vfs_timestamp (struct timespec *); 575 int vn_writechk (struct vnode *vp); 576 int vop_stdbwrite (struct vop_bwrite_args *ap); 577 int vop_stdislocked (struct vop_islocked_args *ap); 578 int vop_stdlock (struct vop_lock_args *ap); 579 int vop_stdrlock (struct vop_lock_args *ap); 580 int vop_stdunlock (struct vop_unlock_args *ap); 581 int vop_nopoll (struct vop_poll_args *ap); 582 int vop_stdpathconf (struct vop_pathconf_args *ap); 583 int vop_stdpoll (struct vop_poll_args *ap); 584 int vop_stdrevoke (struct vop_revoke_args *ap); 585 int vop_eopnotsupp (struct vop_generic_args *ap); 586 int vop_ebadf (struct vop_generic_args *ap); 587 int vop_einval (struct vop_generic_args *ap); 588 int vop_enotty (struct vop_generic_args *ap); 589 int vop_defaultop (struct vop_generic_args *ap); 590 int vop_null (struct vop_generic_args *ap); 591 int vop_panic (struct vop_generic_args *ap); 592 int vop_stdcreatevobject (struct vop_createvobject_args *ap); 593 int vop_stddestroyvobject (struct vop_destroyvobject_args *ap); 594 int vop_stdgetvobject (struct vop_getvobject_args *ap); 595 596 int vop_compat_nresolve(struct vop_nresolve_args *ap); 597 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap); 598 int vop_compat_ncreate(struct vop_ncreate_args *ap); 599 int vop_compat_nmkdir(struct vop_nmkdir_args *ap); 600 int vop_compat_nmknod(struct vop_nmknod_args *ap); 601 int vop_compat_nlink(struct vop_nlink_args *ap); 602 int vop_compat_nsymlink(struct vop_nsymlink_args *ap); 603 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap); 604 int vop_compat_nremove(struct vop_nremove_args *ap); 605 int vop_compat_nrmdir(struct vop_nrmdir_args *ap); 606 int vop_compat_nrename(struct vop_nrename_args *ap); 607 608 int vx_lock (struct vnode *vp); 609 void vx_unlock (struct vnode *vp); 610 int vx_get (struct vnode *vp); 611 int vx_get_nonblock (struct vnode *vp); 612 void vx_put (struct vnode *vp); 613 int vget (struct vnode *vp, int lockflag, struct thread *td); 614 void vput (struct vnode *vp); 615 void vhold (struct vnode *); 616 void vdrop (struct vnode *); 617 void vref (struct vnode *vp); 618 void vrele (struct vnode *vp); 619 void vsetflags (struct vnode *vp, int flags); 620 void vclrflags (struct vnode *vp, int flags); 621 622 void vfs_subr_init(void); 623 void vfs_mount_init(void); 624 void vfs_lock_init(void); 625 void vfs_sync_init(void); 626 627 void vn_syncer_add_to_worklist(struct vnode *, int); 628 void vnlru_proc_wait(void); 629 630 631 extern struct vop_ops *default_vnode_vops; 632 extern struct vop_ops *spec_vnode_vops; 633 extern struct vop_ops *dead_vnode_vops; 634 635 #endif /* _KERNEL */ 636 637 #endif /* !_SYS_VNODE_H_ */ 638