vnode.h revision 90860
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 90860 2002-02-18 16:18:02Z phk $ 35 */ 36 37#ifndef _SYS_VNODE_H_ 38#define _SYS_VNODE_H_ 39 40/* 41 * XXX - compatability until lockmgr() goes away or all the #includes are 42 * updated. 43 */ 44#include <sys/lockmgr.h> 45 46#include <sys/queue.h> 47#include <sys/_lock.h> 48#include <sys/_mutex.h> 49#include <sys/selinfo.h> 50#include <sys/uio.h> 51#include <sys/acl.h> 52 53/* 54 * The vnode is the focus of all file activity in UNIX. There is a 55 * unique vnode allocated for each active file, each current directory, 56 * each mounted-on file, text file, and the root. 57 */ 58 59/* 60 * Vnode types. VNON means no type. 61 */ 62enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 63 64/* 65 * Vnode tag types. 66 * These are for the benefit of external programs only (e.g., pstat) 67 * and should NEVER be inspected by the kernel. 68 */ 69enum vtagtype { 70 VT_NON, VT_UFS, VT_NFS, VT_UNUSED, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, 71 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, 72 VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS, 73 VT_HPFS, VT_NWFS, VT_PSEUDOFS, VT_SMBFS 74}; 75 76/* 77 * Each underlying filesystem allocates its own private area and hangs 78 * it from v_data. If non-null, this area is freed in getnewvnode(). 79 */ 80TAILQ_HEAD(buflists, buf); 81 82typedef int vop_t __P((void *)); 83struct namecache; 84 85struct vpollinfo { 86 struct mtx vpi_lock; /* lock to protect below */ 87 struct selinfo vpi_selinfo; /* identity of poller(s) */ 88 short vpi_events; /* what they are looking for */ 89 short vpi_revents; /* what has happened */ 90}; 91 92/* 93 * Reading or writing any of these items requires holding the appropriate lock. 94 * v_freelist is locked by the global vnode_free_list mutex. 95 * v_mntvnodes is locked by the global mntvnodes mutex. 96 * v_flag, v_usecount, v_holdcount and v_writecount are 97 * locked by the v_interlock mutex. 98 * v_pollinfo is locked by the lock contained inside it. 99 */ 100struct vnode { 101 u_long v_flag; /* vnode flags (see below) */ 102 int v_usecount; /* reference count of users */ 103 int v_writecount; /* reference count of writers */ 104 int v_holdcnt; /* page & buffer references */ 105 u_long v_id; /* capability identifier */ 106 struct mount *v_mount; /* ptr to vfs we are in */ 107 vop_t **v_op; /* vnode operations vector */ 108 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 109 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ 110 struct buflists v_cleanblkhd; /* clean blocklist head */ 111 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 112 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 113 long v_numoutput; /* num of writes in progress */ 114 enum vtype v_type; /* vnode type */ 115 union { 116 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 117 struct socket *vu_socket; /* unix ipc (VSOCK) */ 118 struct { 119 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 120 SLIST_ENTRY(vnode) vu_specnext; 121 } vu_spec; 122 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 123 } v_un; 124 daddr_t v_lastw; /* last write (write cluster) */ 125 daddr_t v_cstart; /* start block of cluster */ 126 daddr_t v_lasta; /* last allocation (cluster) */ 127 int v_clen; /* length of current cluster */ 128 struct vm_object *v_object; /* Place to store VM object */ 129 struct mtx v_interlock; /* lock on usecount and flag */ 130 struct lock v_lock; /* used if fs don't have one */ 131 struct lock *v_vnlock; /* pointer to vnode lock */ 132 enum vtagtype v_tag; /* type of underlying data */ 133 void *v_data; /* private data for fs */ 134 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 135 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 136 struct vnode *v_dd; /* .. vnode */ 137 u_long v_ddid; /* .. capability identifier */ 138 struct vpollinfo *v_pollinfo; 139 struct thread *v_vxproc; /* thread owning VXLOCK */ 140#ifdef DEBUG_LOCKS 141 const char *filename; /* Source file doing locking */ 142 int line; /* Line number doing locking */ 143#endif 144}; 145#define v_mountedhere v_un.vu_mountedhere 146#define v_socket v_un.vu_socket 147#define v_rdev v_un.vu_spec.vu_specinfo 148#define v_specnext v_un.vu_spec.vu_specnext 149#define v_fifoinfo v_un.vu_fifoinfo 150 151#define VN_POLLEVENT(vp, events) \ 152 do { \ 153 if ((vp)->v_pollinfo != NULL && \ 154 (vp)->v_pollinfo->vpi_events & (events)) \ 155 vn_pollevent((vp), (events)); \ 156 } while (0) 157 158#define VN_KNOTE(vp, b) \ 159 do { \ 160 if ((vp)->v_pollinfo != NULL) \ 161 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 162 } while (0) 163 164/* 165 * Vnode flags. 166 */ 167#define VROOT 0x00001 /* root of its file system */ 168#define VTEXT 0x00002 /* vnode is a pure text prototype */ 169#define VSYSTEM 0x00004 /* vnode being used by kernel */ 170#define VISTTY 0x00008 /* vnode represents a tty */ 171#define VXLOCK 0x00100 /* vnode is locked to change underlying type */ 172#define VXWANT 0x00200 /* thread is waiting for vnode */ 173#define VBWAIT 0x00400 /* waiting for output to complete */ 174#define VNOSYNC 0x01000 /* unlinked, stop syncing */ 175/* open for business 0x01000 */ 176#define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 177#define VCOPYONWRITE 0x04000 /* vnode is doing copy-on-write */ 178#define VAGE 0x08000 /* Insert vnode at head of free list */ 179#define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 180#define VOWANT 0x20000 /* a thread is waiting for VOLOCK */ 181#define VDOOMED 0x40000 /* This vnode is being recycled */ 182#define VFREE 0x80000 /* This vnode is on the freelist */ 183/* open for business 0x100000 */ 184#define VONWORKLST 0x200000 /* On syncer work-list */ 185#define VMOUNT 0x400000 /* Mount in progress */ 186#define VOBJDIRTY 0x800000 /* object might be dirty */ 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#define IO_ASYNC 0x80 /* bawrite rather then bdwrite */ 232#define IO_DIRECT 0x100 /* attempt to bypass buffer cache */ 233#define IO_NOWDRAIN 0x200 /* do not block on wdrain */ 234 235/* 236 * Modes. Some values same as Ixxx entries from inode.h for now. 237 */ 238#define VADMIN 010000 /* permission to administer vnode */ 239#define VSUID 004000 /* set user id on execution */ 240#define VSGID 002000 /* set group id on execution */ 241#define VSVTX 001000 /* save swapped text even after use */ 242#define VREAD 000400 /* read, write, execute permissions */ 243#define VWRITE 000200 244#define VEXEC 000100 245 246/* 247 * Token indicating no attribute value yet assigned. 248 */ 249#define VNOVAL (-1) 250 251/* 252 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 253 */ 254#define VLKTIMEOUT (hz / 20 + 1) 255 256#ifdef _KERNEL 257 258#ifdef MALLOC_DECLARE 259MALLOC_DECLARE(M_VNODE); 260#endif 261 262/* 263 * Convert between vnode types and inode formats (since POSIX.1 264 * defines mode word of stat structure in terms of inode formats). 265 */ 266extern enum vtype iftovt_tab[]; 267extern int vttoif_tab[]; 268#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 269#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 270#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 271 272/* 273 * Flags to various vnode functions. 274 */ 275#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 276#define FORCECLOSE 0x0002 /* vflush: force file closure */ 277#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 278#define DOCLOSE 0x0008 /* vclean: close active files */ 279#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 280#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 281#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 282#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 283#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 284 285#define VREF(vp) vref(vp) 286 287 288#ifdef DIAGNOSTIC 289#define VATTR_NULL(vap) vattr_null(vap) 290#else 291#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 292#endif /* DIAGNOSTIC */ 293 294#define NULLVP ((struct vnode *)NULL) 295 296#define VNODEOP_SET(f) \ 297 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 298 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 299 300/* 301 * Global vnode data. 302 */ 303extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 304extern int desiredvnodes; /* number of vnodes desired */ 305extern struct vm_zone *namei_zone; 306extern int prtactive; /* nonzero to call vprint() */ 307extern struct vattr va_null; /* predefined null vattr structure */ 308extern int vfs_ioopt; 309 310/* 311 * Macro/function to check for client cache inconsistency w.r.t. leasing. 312 */ 313#define LEASE_READ 0x1 /* Check lease for readers */ 314#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 315 316 317extern void (*lease_updatetime) __P((int deltat)); 318 319#define VSHOULDFREE(vp) \ 320 (!((vp)->v_flag & (VFREE|VDOOMED)) && \ 321 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 322 (!(vp)->v_object || \ 323 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 324 325#define VMIGHTFREE(vp) \ 326 (!((vp)->v_flag & (VFREE|VDOOMED|VXLOCK)) && \ 327 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 328 329#define VSHOULDBUSY(vp) \ 330 (((vp)->v_flag & VFREE) && \ 331 ((vp)->v_holdcnt || (vp)->v_usecount)) 332 333#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 334#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 335#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 336 337#endif /* _KERNEL */ 338 339 340/* 341 * Mods for extensibility. 342 */ 343 344/* 345 * Flags for vdesc_flags: 346 */ 347#define VDESC_MAX_VPS 16 348/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 349#define VDESC_VP0_WILLRELE 0x0001 350#define VDESC_VP1_WILLRELE 0x0002 351#define VDESC_VP2_WILLRELE 0x0004 352#define VDESC_VP3_WILLRELE 0x0008 353#define VDESC_NOMAP_VPP 0x0100 354#define VDESC_VPP_WILLRELE 0x0200 355 356/* 357 * VDESC_NO_OFFSET is used to identify the end of the offset list 358 * and in places where no such field exists. 359 */ 360#define VDESC_NO_OFFSET -1 361 362/* 363 * This structure describes the vnode operation taking place. 364 */ 365struct vnodeop_desc { 366 int vdesc_offset; /* offset in vector,first for speed */ 367 char *vdesc_name; /* a readable name for debugging */ 368 int vdesc_flags; /* VDESC_* flags */ 369 370 /* 371 * These ops are used by bypass routines to map and locate arguments. 372 * Creds and procs are not needed in bypass routines, but sometimes 373 * they are useful to (for example) transport layers. 374 * Nameidata is useful because it has a cred in it. 375 */ 376 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 377 int vdesc_vpp_offset; /* return vpp location */ 378 int vdesc_cred_offset; /* cred location, if any */ 379 int vdesc_thread_offset; /* thread location, if any */ 380 int vdesc_componentname_offset; /* if any */ 381 /* 382 * Finally, we've got a list of private data (about each operation) 383 * for each transport layer. (Support to manage this list is not 384 * yet part of BSD.) 385 */ 386 caddr_t *vdesc_transports; 387}; 388 389#ifdef _KERNEL 390/* 391 * A list of all the operation descs. 392 */ 393extern struct vnodeop_desc *vnodeop_descs[]; 394 395/* 396 * Interlock for scanning list of vnodes attached to a mountpoint 397 */ 398extern struct mtx mntvnode_mtx; 399 400/* 401 * This macro is very helpful in defining those offsets in the vdesc struct. 402 * 403 * This is stolen from X11R4. I ignored all the fancy stuff for 404 * Crays, so if you decide to port this to such a serious machine, 405 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 406 */ 407#define VOPARG_OFFSET(p_type,field) \ 408 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 409#define VOPARG_OFFSETOF(s_type,field) \ 410 VOPARG_OFFSET(s_type*,field) 411#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 412 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 413 414 415/* 416 * This structure is used to configure the new vnodeops vector. 417 */ 418struct vnodeopv_entry_desc { 419 struct vnodeop_desc *opve_op; /* which operation this is */ 420 vop_t *opve_impl; /* code implementing this operation */ 421}; 422struct vnodeopv_desc { 423 /* ptr to the ptr to the vector where op should go */ 424 vop_t ***opv_desc_vector_p; 425 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 426}; 427 428/* 429 * A generic structure. 430 * This can be used by bypass routines to identify generic arguments. 431 */ 432struct vop_generic_args { 433 struct vnodeop_desc *a_desc; 434 /* other random data follows, presumably */ 435}; 436 437 438#ifdef DEBUG_VFS_LOCKS 439/* 440 * Macros to aid in tracing VFS locking problems. Not totally 441 * reliable since if the thread sleeps between changing the lock 442 * state and checking it with the assert, some other thread could 443 * change the state. They are good enough for debugging a single 444 * filesystem using a single-threaded test. I find that 'cvs co src' 445 * is a pretty good test. 446 */ 447 448/* 449 * [dfr] Kludge until I get around to fixing all the vfs locking. 450 */ 451#define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \ 452 || (vp)->v_tag == VT_NFS \ 453 || (vp)->v_tag == VT_LFS \ 454 || (vp)->v_tag == VT_ISOFS \ 455 || (vp)->v_tag == VT_MSDOSFS \ 456 || (vp)->v_tag == VT_DEVFS) 457 458#define ASSERT_VOP_LOCKED(vp, str) \ 459do { \ 460 struct vnode *_vp = (vp); \ 461 \ 462 if (_vp && IS_LOCKING_VFS(_vp) && !VOP_ISLOCKED(_vp, NULL)) \ 463 panic("%s: %p is not locked but should be", str, _vp); \ 464} while (0) 465 466#define ASSERT_VOP_UNLOCKED(vp, str) \ 467do { \ 468 struct vnode *_vp = (vp); \ 469 int lockstate; \ 470 \ 471 if (_vp && IS_LOCKING_VFS(_vp)) { \ 472 lockstate = VOP_ISLOCKED(_vp, curthread); \ 473 if (lockstate == LK_EXCLUSIVE) \ 474 panic("%s: %p is locked but should not be", \ 475 str, _vp); \ 476 } \ 477} while (0) 478 479#define ASSERT_VOP_ELOCKED(vp, str) \ 480do { \ 481 struct vnode *_vp = (vp); \ 482 \ 483 if (_vp && IS_LOCKING_VFS(_vp) && \ 484 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \ 485 panic("%s: %p is not exclusive locked but should be", \ 486 str, _vp); \ 487} while (0) 488 489#define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 490do { \ 491 struct vnode *_vp = (vp); \ 492 \ 493 if (_vp && IS_LOCKING_VFS(_vp) && \ 494 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \ 495 panic("%s: %p is not exclusive locked by another thread", \ 496 str, _vp); \ 497} while (0) 498 499#define ASSERT_VOP_SLOCKED(vp, str) \ 500do { \ 501 struct vnode *_vp = (vp); \ 502 \ 503 if (_vp && IS_LOCKING_VFS(_vp) && \ 504 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \ 505 panic("%s: %p is not locked shared but should be", \ 506 str, _vp); \ 507} while (0) 508 509#else 510 511#define ASSERT_VOP_LOCKED(vp, str) 512#define ASSERT_VOP_UNLOCKED(vp, str) 513 514#endif 515 516/* 517 * VOCALL calls an op given an ops vector. We break it out because BSD's 518 * vclean changes the ops vector and then wants to call ops with the old 519 * vector. 520 */ 521#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 522 523/* 524 * This call works for vnodes in the kernel. 525 */ 526#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 527#define VDESC(OP) (& __CONCAT(OP,_desc)) 528#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 529 530/* 531 * VMIO support inline 532 */ 533 534extern int vmiodirenable; 535 536static __inline int 537vn_canvmio(struct vnode *vp) 538{ 539 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 540 return(TRUE); 541 return(FALSE); 542} 543 544/* 545 * Finally, include the default set of vnode operations. 546 */ 547#include "vnode_if.h" 548 549/* 550 * Public vnode manipulation functions. 551 */ 552struct componentname; 553struct file; 554struct mount; 555struct nameidata; 556struct ostat; 557struct thread; 558struct proc; 559struct stat; 560struct nstat; 561struct ucred; 562struct uio; 563struct vattr; 564struct vnode; 565 566extern int (*lease_check_hook) __P((struct vop_lease_args *)); 567 568struct vnode *addaliasu __P((struct vnode *vp, udev_t nvp_rdev)); 569int bdevvp __P((dev_t dev, struct vnode **vpp)); 570/* cache_* may belong in namei.h. */ 571void cache_enter __P((struct vnode *dvp, struct vnode *vp, 572 struct componentname *cnp)); 573int cache_lookup __P((struct vnode *dvp, struct vnode **vpp, 574 struct componentname *cnp)); 575void cache_purge __P((struct vnode *vp)); 576void cache_purgevfs __P((struct mount *mp)); 577int cache_leaf_test __P((struct vnode *vp)); 578void cvtstat __P((struct stat *st, struct ostat *ost)); 579void cvtnstat __P((struct stat *sb, struct nstat *nsb)); 580int getnewvnode __P((enum vtagtype tag, 581 struct mount *mp, vop_t **vops, struct vnode **vpp)); 582int lease_check __P((struct vop_lease_args *ap)); 583int spec_vnoperate __P((struct vop_generic_args *)); 584int speedup_syncer __P((void)); 585#define textvp_fullpath(p, rb, rfb) \ 586 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 587int vn_fullpath __P((struct thread *td, struct vnode *vn, 588 char **retbuf, char **freebuf)); 589int vaccess __P((enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 590 mode_t acc_mode, struct ucred *cred, int *privused)); 591int vaccess_acl_posix1e __P((enum vtype type, uid_t file_uid, 592 gid_t file_gid, struct acl *acl, mode_t acc_mode, 593 struct ucred *cred, int *privused)); 594void vattr_null __P((struct vattr *vap)); 595int vcount __P((struct vnode *vp)); 596void vdrop __P((struct vnode *)); 597int vfinddev __P((dev_t dev, enum vtype type, struct vnode **vpp)); 598void vfs_add_vnodeops __P((const void *)); 599void vfs_rm_vnodeops __P((const void *)); 600int vflush __P((struct mount *mp, int rootrefs, int flags)); 601int vget __P((struct vnode *vp, int lockflag, struct thread *td)); 602void vgone __P((struct vnode *vp)); 603void vgonel __P((struct vnode *vp, struct thread *td)); 604void vhold __P((struct vnode *)); 605int vinvalbuf __P((struct vnode *vp, int save, struct ucred *cred, 606 struct thread *td, int slpflag, int slptimeo)); 607int vtruncbuf __P((struct vnode *vp, struct ucred *cred, struct thread *td, 608 off_t length, int blksize)); 609void vprint __P((char *label, struct vnode *vp)); 610int vrecycle __P((struct vnode *vp, struct mtx *inter_lkp, 611 struct thread *td)); 612int vn_close __P((struct vnode *vp, 613 int flags, struct ucred *cred, struct thread *td)); 614void vn_finished_write __P((struct mount *mp)); 615int vn_isdisk __P((struct vnode *vp, int *errp)); 616int vn_lock __P((struct vnode *vp, int flags, struct thread *td)); 617#ifdef DEBUG_LOCKS 618int debug_vn_lock __P((struct vnode *vp, int flags, struct thread *p, 619 const char *filename, int line)); 620#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 621#endif 622int vn_mkdir __P((char *path, int mode, enum uio_seg segflg, struct thread *td)); 623int vn_open __P((struct nameidata *ndp, int *flagp, int cmode)); 624int vn_open_cred __P((struct nameidata *ndp, int *flagp, int cmode, 625 struct ucred *cred)); 626void vn_pollevent __P((struct vnode *vp, int events)); 627void vn_pollgone __P((struct vnode *vp)); 628int vn_pollrecord __P((struct vnode *vp, struct thread *p, int events)); 629int vn_rdwr __P((enum uio_rw rw, struct vnode *vp, caddr_t base, 630 int len, off_t offset, enum uio_seg segflg, int ioflg, 631 struct ucred *cred, int *aresid, struct thread *td)); 632int vn_rdwr_inchunks __P((enum uio_rw rw, struct vnode *vp, caddr_t base, 633 int len, off_t offset, enum uio_seg segflg, int ioflg, 634 struct ucred *cred, int *aresid, struct thread *td)); 635int vn_stat __P((struct vnode *vp, struct stat *sb, struct thread *td)); 636int vn_start_write __P((struct vnode *vp, struct mount **mpp, int flags)); 637dev_t vn_todev __P((struct vnode *vp)); 638int vn_write_suspend_wait __P((struct vnode *vp, struct mount *mp, 639 int flags)); 640int vn_writechk __P((struct vnode *vp)); 641int vn_extattr_get __P((struct vnode *vp, int ioflg, int attrnamespace, 642 const char *attrname, int *buflen, char *buf, struct thread *td)); 643int vn_extattr_set __P((struct vnode *vp, int ioflg, int attrnamespace, 644 const char *attrname, int buflen, char *buf, struct thread *td)); 645int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 646 const char *attrname, struct thread *td); 647int vfs_cache_lookup __P((struct vop_lookup_args *ap)); 648int vfs_object_create __P((struct vnode *vp, struct thread *td, 649 struct ucred *cred)); 650void vfs_timestamp __P((struct timespec *)); 651void vfs_write_resume __P((struct mount *mp)); 652void vfs_write_suspend __P((struct mount *mp)); 653int vop_stdbmap __P((struct vop_bmap_args *)); 654int vop_stdgetwritemount __P((struct vop_getwritemount_args *)); 655int vop_stdgetpages __P((struct vop_getpages_args *)); 656int vop_stdinactive __P((struct vop_inactive_args *)); 657int vop_stdislocked __P((struct vop_islocked_args *)); 658int vop_stdlock __P((struct vop_lock_args *)); 659int vop_stdputpages __P((struct vop_putpages_args *)); 660int vop_stdunlock __P((struct vop_unlock_args *)); 661int vop_noislocked __P((struct vop_islocked_args *)); 662int vop_nolock __P((struct vop_lock_args *)); 663int vop_nopoll __P((struct vop_poll_args *)); 664int vop_nounlock __P((struct vop_unlock_args *)); 665int vop_stdpathconf __P((struct vop_pathconf_args *)); 666int vop_stdpoll __P((struct vop_poll_args *)); 667int vop_revoke __P((struct vop_revoke_args *)); 668int vop_sharedlock __P((struct vop_lock_args *)); 669int vop_eopnotsupp __P((struct vop_generic_args *ap)); 670int vop_ebadf __P((struct vop_generic_args *ap)); 671int vop_einval __P((struct vop_generic_args *ap)); 672int vop_enotty __P((struct vop_generic_args *ap)); 673int vop_defaultop __P((struct vop_generic_args *ap)); 674int vop_null __P((struct vop_generic_args *ap)); 675int vop_panic __P((struct vop_generic_args *ap)); 676int vop_stdcreatevobject __P((struct vop_createvobject_args *ap)); 677int vop_stddestroyvobject __P((struct vop_destroyvobject_args *ap)); 678int vop_stdgetvobject __P((struct vop_getvobject_args *ap)); 679 680void vfree __P((struct vnode *)); 681void vput __P((struct vnode *vp)); 682void vrele __P((struct vnode *vp)); 683void vref __P((struct vnode *vp)); 684void vbusy __P((struct vnode *vp)); 685void v_addpollinfo(struct vnode *vp); 686 687extern vop_t **default_vnodeop_p; 688extern vop_t **spec_vnodeop_p; 689extern vop_t **dead_vnodeop_p; 690 691#endif /* _KERNEL */ 692 693#endif /* !_SYS_VNODE_H_ */ 694