vnode.h revision 95481
11832Swollman/* 250473Speter * Copyright (c) 1989, 1993 31832Swollman * The Regents of the University of California. All rights reserved. 41832Swollman * 51832Swollman * Redistribution and use in source and binary forms, with or without 6231118Sdim * modification, are permitted provided that the following conditions 71832Swollman * are met: 826208Swpaul * 1. Redistributions of source code must retain the above copyright 916123Swpaul * notice, this list of conditions and the following disclaimer. 1026208Swpaul * 2. Redistributions in binary form must reproduce the above copyright 1126208Swpaul * notice, this list of conditions and the following disclaimer in the 1226208Swpaul * documentation and/or other materials provided with the distribution. 131832Swollman * 3. All advertising materials mentioning features or use of this software 1426208Swpaul * must display the following acknowledgement: 1526208Swpaul * This product includes software developed by the University of 1626208Swpaul * California, Berkeley and its contributors. 171832Swollman * 4. Neither the name of the University nor the names of its contributors 181832Swollman * may be used to endorse or promote products derived from this software 191832Swollman * without specific prior written permission. 2096462Sru * 2196462Sru * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2296462Sru * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2396462Sru * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2496462Sru * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251832Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261832Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2739429Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281832Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2932551Sbde * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3032551Sbde * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311832Swollman * SUCH DAMAGE. 32 * 33 * @(#)vnode.h 8.7 (Berkeley) 2/4/94 34 * $FreeBSD: head/sys/sys/vnode.h 95481 2002-04-26 04:06:08Z rwatson $ 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#include <vm/uma.h> 53 54/* 55 * The vnode is the focus of all file activity in UNIX. There is a 56 * unique vnode allocated for each active file, each current directory, 57 * each mounted-on file, text file, and the root. 58 */ 59 60/* 61 * Vnode types. VNON means no type. 62 */ 63enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 64 65/* 66 * Vnode tag types. 67 * These are for the benefit of external programs only (e.g., pstat) 68 * and should NEVER be inspected by the kernel. 69 */ 70enum vtagtype { 71 VT_NON, VT_UFS, VT_NFS, VT_UNUSED, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, 72 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, 73 VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS, 74 VT_HPFS, VT_NWFS, VT_PSEUDOFS, VT_SMBFS, VT_UDF 75}; 76 77/* 78 * Each underlying filesystem allocates its own private area and hangs 79 * it from v_data. If non-null, this area is freed in getnewvnode(). 80 */ 81TAILQ_HEAD(buflists, buf); 82 83typedef int vop_t(void *); 84struct namecache; 85 86struct vpollinfo { 87 struct mtx vpi_lock; /* lock to protect below */ 88 struct selinfo vpi_selinfo; /* identity of poller(s) */ 89 short vpi_events; /* what they are looking for */ 90 short vpi_revents; /* what has happened */ 91}; 92 93/* 94 * Reading or writing any of these items requires holding the appropriate lock. 95 * v_freelist is locked by the global vnode_free_list mutex. 96 * v_mntvnodes is locked by the global mntvnodes mutex. 97 * v_flag, v_usecount, v_holdcount and v_writecount are 98 * locked by the v_interlock mutex. 99 * v_pollinfo is locked by the lock contained inside it. 100 */ 101struct vnode { 102 u_long v_flag; /* vnode flags (see below) */ 103 int v_usecount; /* reference count of users */ 104 int v_writecount; /* reference count of writers */ 105 int v_holdcnt; /* page & buffer references */ 106 u_long v_id; /* capability identifier */ 107 struct mount *v_mount; /* ptr to vfs we are in */ 108 vop_t **v_op; /* vnode operations vector */ 109 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 110 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ 111 struct buflists v_cleanblkhd; /* clean blocklist head */ 112 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 113 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 114 long v_numoutput; /* num of writes in progress */ 115 enum vtype v_type; /* vnode type */ 116 union { 117 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 118 struct socket *vu_socket; /* unix ipc (VSOCK) */ 119 struct { 120 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 121 SLIST_ENTRY(vnode) vu_specnext; 122 } vu_spec; 123 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 124 } v_un; 125 daddr_t v_lastw; /* last write (write cluster) */ 126 daddr_t v_cstart; /* start block of cluster */ 127 daddr_t v_lasta; /* last allocation (cluster) */ 128 int v_clen; /* length of current cluster */ 129 struct vm_object *v_object; /* Place to store VM object */ 130 struct mtx v_interlock; /* lock on usecount and flag */ 131 struct lock v_lock; /* used if fs don't have one */ 132 struct lock *v_vnlock; /* pointer to vnode lock */ 133 enum vtagtype v_tag; /* type of underlying data */ 134 void *v_data; /* private data for fs */ 135 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 136 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 137 struct vnode *v_dd; /* .. vnode */ 138 u_long v_ddid; /* .. capability identifier */ 139 struct vpollinfo *v_pollinfo; 140 struct thread *v_vxproc; /* thread owning VXLOCK */ 141#ifdef DEBUG_LOCKS 142 const char *filename; /* Source file doing locking */ 143 int line; /* Line number doing locking */ 144#endif 145}; 146#define v_mountedhere v_un.vu_mountedhere 147#define v_socket v_un.vu_socket 148#define v_rdev v_un.vu_spec.vu_specinfo 149#define v_specnext v_un.vu_spec.vu_specnext 150#define v_fifoinfo v_un.vu_fifoinfo 151 152#define VN_POLLEVENT(vp, events) \ 153 do { \ 154 if ((vp)->v_pollinfo != NULL && \ 155 (vp)->v_pollinfo->vpi_events & (events)) \ 156 vn_pollevent((vp), (events)); \ 157 } while (0) 158 159#define VN_KNOTE(vp, b) \ 160 do { \ 161 if ((vp)->v_pollinfo != NULL) \ 162 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 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 /* thread is waiting for vnode */ 174#define VBWAIT 0x00400 /* waiting for output to complete */ 175#define VNOSYNC 0x01000 /* unlinked, stop syncing */ 176/* open for business 0x01000 */ 177#define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 178#define VCOPYONWRITE 0x04000 /* vnode is doing copy-on-write */ 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 thread is waiting for VOLOCK */ 182#define VDOOMED 0x40000 /* This vnode is being recycled */ 183#define VFREE 0x80000 /* This vnode is on the freelist */ 184/* open for business 0x100000 */ 185#define VONWORKLST 0x200000 /* On syncer work-list */ 186#define VMOUNT 0x400000 /* Mount in progress */ 187#define VOBJDIRTY 0x800000 /* object might be dirty */ 188 189/* 190 * Vnode attributes. A field value of VNOVAL represents a field whose value 191 * is unavailable (getattr) or which is not to be changed (setattr). 192 */ 193struct vattr { 194 enum vtype va_type; /* vnode type (for create) */ 195 u_short va_mode; /* files access mode and type */ 196 short va_nlink; /* number of references to file */ 197 uid_t va_uid; /* owner user id */ 198 gid_t va_gid; /* owner group id */ 199 udev_t va_fsid; /* file system id */ 200 long va_fileid; /* file id */ 201 u_quad_t va_size; /* file size in bytes */ 202 long va_blocksize; /* blocksize preferred for i/o */ 203 struct timespec va_atime; /* time of last access */ 204 struct timespec va_mtime; /* time of last modification */ 205 struct timespec va_ctime; /* time file changed */ 206 u_long va_gen; /* generation number of file */ 207 u_long va_flags; /* flags defined for file */ 208 udev_t va_rdev; /* device the special file represents */ 209 u_quad_t va_bytes; /* bytes of disk space held by file */ 210 u_quad_t va_filerev; /* file modification number */ 211 u_int va_vaflags; /* operations flags, see below */ 212 long va_spare; /* remain quad aligned */ 213}; 214 215/* 216 * Flags for va_vaflags. 217 */ 218#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 219#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 220 221/* 222 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 223 * help with write clustering) 224 */ 225#define IO_UNIT 0x01 /* do I/O as atomic unit */ 226#define IO_APPEND 0x02 /* append write to end */ 227#define IO_SYNC 0x04 /* do I/O synchronously */ 228#define IO_NODELOCKED 0x08 /* underlying node already locked */ 229#define IO_NDELAY 0x10 /* FNDELAY flag set in file table */ 230#define IO_VMIO 0x20 /* data already in VMIO space */ 231#define IO_INVAL 0x40 /* invalidate after I/O */ 232#define IO_ASYNC 0x80 /* bawrite rather then bdwrite */ 233#define IO_DIRECT 0x100 /* attempt to bypass buffer cache */ 234#define IO_NOWDRAIN 0x200 /* do not block on wdrain */ 235 236/* 237 * Modes. Some values same as Ixxx entries from inode.h for now. 238 */ 239#define VADMIN 010000 /* permission to administer vnode */ 240#define VSUID 004000 /* set user id on execution */ 241#define VSGID 002000 /* set group id on execution */ 242#define VSVTX 001000 /* save swapped text even after use */ 243#define VREAD 000400 /* read, write, execute permissions */ 244#define VWRITE 000200 245#define VEXEC 000100 246 247/* 248 * Token indicating no attribute value yet assigned. 249 */ 250#define VNOVAL (-1) 251 252/* 253 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 254 */ 255#define VLKTIMEOUT (hz / 20 + 1) 256 257#ifdef _KERNEL 258 259#ifdef MALLOC_DECLARE 260MALLOC_DECLARE(M_VNODE); 261#endif 262 263/* 264 * Convert between vnode types and inode formats (since POSIX.1 265 * defines mode word of stat structure in terms of inode formats). 266 */ 267extern enum vtype iftovt_tab[]; 268extern int vttoif_tab[]; 269#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 270#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 271#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 272 273/* 274 * Flags to various vnode functions. 275 */ 276#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 277#define FORCECLOSE 0x0002 /* vflush: force file closure */ 278#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 279#define DOCLOSE 0x0008 /* vclean: close active files */ 280#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 281#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 282#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 283#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 284#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 285 286#define VREF(vp) vref(vp) 287 288 289#ifdef DIAGNOSTIC 290#define VATTR_NULL(vap) vattr_null(vap) 291#else 292#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 293#endif /* DIAGNOSTIC */ 294 295#define NULLVP ((struct vnode *)NULL) 296 297#define VNODEOP_SET(f) \ 298 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 299 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 300 301/* 302 * Global vnode data. 303 */ 304extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 305extern int desiredvnodes; /* number of vnodes desired */ 306extern uma_zone_t namei_zone; 307extern int prtactive; /* nonzero to call vprint() */ 308extern struct vattr va_null; /* predefined null vattr structure */ 309extern int vfs_ioopt; 310 311/* 312 * Macro/function to check for client cache inconsistency w.r.t. leasing. 313 */ 314#define LEASE_READ 0x1 /* Check lease for readers */ 315#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 316 317 318extern void (*lease_updatetime)(int deltat); 319 320#define VSHOULDFREE(vp) \ 321 (!((vp)->v_flag & (VFREE|VDOOMED)) && \ 322 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 323 (!(vp)->v_object || \ 324 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 325 326#define VMIGHTFREE(vp) \ 327 (!((vp)->v_flag & (VFREE|VDOOMED|VXLOCK)) && \ 328 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 329 330#define VSHOULDBUSY(vp) \ 331 (((vp)->v_flag & VFREE) && \ 332 ((vp)->v_holdcnt || (vp)->v_usecount)) 333 334#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 335#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 336#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 337 338#endif /* _KERNEL */ 339 340 341/* 342 * Mods for extensibility. 343 */ 344 345/* 346 * Flags for vdesc_flags: 347 */ 348#define VDESC_MAX_VPS 16 349/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 350#define VDESC_VP0_WILLRELE 0x0001 351#define VDESC_VP1_WILLRELE 0x0002 352#define VDESC_VP2_WILLRELE 0x0004 353#define VDESC_VP3_WILLRELE 0x0008 354#define VDESC_NOMAP_VPP 0x0100 355#define VDESC_VPP_WILLRELE 0x0200 356 357/* 358 * VDESC_NO_OFFSET is used to identify the end of the offset list 359 * and in places where no such field exists. 360 */ 361#define VDESC_NO_OFFSET -1 362 363/* 364 * This structure describes the vnode operation taking place. 365 */ 366struct vnodeop_desc { 367 int vdesc_offset; /* offset in vector,first for speed */ 368 char *vdesc_name; /* a readable name for debugging */ 369 int vdesc_flags; /* VDESC_* flags */ 370 371 /* 372 * These ops are used by bypass routines to map and locate arguments. 373 * Creds and procs are not needed in bypass routines, but sometimes 374 * they are useful to (for example) transport layers. 375 * Nameidata is useful because it has a cred in it. 376 */ 377 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 378 int vdesc_vpp_offset; /* return vpp location */ 379 int vdesc_cred_offset; /* cred location, if any */ 380 int vdesc_thread_offset; /* thread location, if any */ 381 int vdesc_componentname_offset; /* if any */ 382 /* 383 * Finally, we've got a list of private data (about each operation) 384 * for each transport layer. (Support to manage this list is not 385 * yet part of BSD.) 386 */ 387 caddr_t *vdesc_transports; 388}; 389 390#ifdef _KERNEL 391/* 392 * A list of all the operation descs. 393 */ 394extern struct vnodeop_desc *vnodeop_descs[]; 395 396/* 397 * Interlock for scanning list of vnodes attached to a mountpoint 398 */ 399extern struct mtx mntvnode_mtx; 400 401/* 402 * This macro is very helpful in defining those offsets in the vdesc struct. 403 * 404 * This is stolen from X11R4. I ignored all the fancy stuff for 405 * Crays, so if you decide to port this to such a serious machine, 406 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 407 */ 408#define VOPARG_OFFSET(p_type,field) \ 409 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 410#define VOPARG_OFFSETOF(s_type,field) \ 411 VOPARG_OFFSET(s_type*,field) 412#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 413 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 414 415 416/* 417 * This structure is used to configure the new vnodeops vector. 418 */ 419struct vnodeopv_entry_desc { 420 struct vnodeop_desc *opve_op; /* which operation this is */ 421 vop_t *opve_impl; /* code implementing this operation */ 422}; 423struct vnodeopv_desc { 424 /* ptr to the ptr to the vector where op should go */ 425 vop_t ***opv_desc_vector_p; 426 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 427}; 428 429/* 430 * A generic structure. 431 * This can be used by bypass routines to identify generic arguments. 432 */ 433struct vop_generic_args { 434 struct vnodeop_desc *a_desc; 435 /* other random data follows, presumably */ 436}; 437 438 439#ifdef DEBUG_VFS_LOCKS 440/* 441 * Macros to aid in tracing VFS locking problems. Not totally 442 * reliable since if the thread sleeps between changing the lock 443 * state and checking it with the assert, some other thread could 444 * change the state. They are good enough for debugging a single 445 * filesystem using a single-threaded test. I find that 'cvs co src' 446 * is a pretty good test. 447 */ 448 449/* 450 * [dfr] Kludge until I get around to fixing all the vfs locking. 451 */ 452#define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \ 453 || (vp)->v_tag == VT_NFS \ 454 || (vp)->v_tag == VT_LFS \ 455 || (vp)->v_tag == VT_ISOFS \ 456 || (vp)->v_tag == VT_MSDOSFS \ 457 || (vp)->v_tag == VT_UDF) 458 459#define ASSERT_VOP_LOCKED(vp, str) \ 460do { \ 461 struct vnode *_vp = (vp); \ 462 \ 463 if (_vp && IS_LOCKING_VFS(_vp) && !VOP_ISLOCKED(_vp, NULL)) \ 464 panic("%s: %p is not locked but should be", str, _vp); \ 465} while (0) 466 467#define ASSERT_VOP_UNLOCKED(vp, str) \ 468do { \ 469 struct vnode *_vp = (vp); \ 470 int lockstate; \ 471 \ 472 if (_vp && IS_LOCKING_VFS(_vp)) { \ 473 lockstate = VOP_ISLOCKED(_vp, curthread); \ 474 if (lockstate == LK_EXCLUSIVE) \ 475 panic("%s: %p is locked but should not be", \ 476 str, _vp); \ 477 } \ 478} while (0) 479 480#define ASSERT_VOP_ELOCKED(vp, str) \ 481do { \ 482 struct vnode *_vp = (vp); \ 483 \ 484 if (_vp && IS_LOCKING_VFS(_vp) && \ 485 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \ 486 panic("%s: %p is not exclusive locked but should be", \ 487 str, _vp); \ 488} while (0) 489 490#define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 491do { \ 492 struct vnode *_vp = (vp); \ 493 \ 494 if (_vp && IS_LOCKING_VFS(_vp) && \ 495 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \ 496 panic("%s: %p is not exclusive locked by another thread", \ 497 str, _vp); \ 498} while (0) 499 500#define ASSERT_VOP_SLOCKED(vp, str) \ 501do { \ 502 struct vnode *_vp = (vp); \ 503 \ 504 if (_vp && IS_LOCKING_VFS(_vp) && \ 505 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \ 506 panic("%s: %p is not locked shared but should be", \ 507 str, _vp); \ 508} while (0) 509 510#else 511 512#define ASSERT_VOP_LOCKED(vp, str) 513#define ASSERT_VOP_UNLOCKED(vp, str) 514 515#endif 516 517/* 518 * VOCALL calls an op given an ops vector. We break it out because BSD's 519 * vclean changes the ops vector and then wants to call ops with the old 520 * vector. 521 */ 522#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 523 524/* 525 * This call works for vnodes in the kernel. 526 */ 527#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 528#define VDESC(OP) (& __CONCAT(OP,_desc)) 529#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 530 531/* 532 * VMIO support inline 533 */ 534 535extern int vmiodirenable; 536 537static __inline int 538vn_canvmio(struct vnode *vp) 539{ 540 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 541 return(TRUE); 542 return(FALSE); 543} 544 545/* 546 * Finally, include the default set of vnode operations. 547 */ 548#include "vnode_if.h" 549 550/* 551 * Public vnode manipulation functions. 552 */ 553struct componentname; 554struct file; 555struct mount; 556struct nameidata; 557struct ostat; 558struct thread; 559struct proc; 560struct stat; 561struct nstat; 562struct ucred; 563struct uio; 564struct vattr; 565struct vnode; 566 567extern int (*lease_check_hook)(struct vop_lease_args *); 568 569struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev); 570int bdevvp(dev_t dev, struct vnode **vpp); 571/* cache_* may belong in namei.h. */ 572void cache_enter(struct vnode *dvp, struct vnode *vp, 573 struct componentname *cnp); 574int cache_lookup(struct vnode *dvp, struct vnode **vpp, 575 struct componentname *cnp); 576void cache_purge(struct vnode *vp); 577void cache_purgevfs(struct mount *mp); 578int cache_leaf_test(struct vnode *vp); 579void cvtstat(struct stat *st, struct ostat *ost); 580void cvtnstat(struct stat *sb, struct nstat *nsb); 581int getnewvnode(enum vtagtype tag, 582 struct mount *mp, vop_t **vops, struct vnode **vpp); 583int lease_check(struct vop_lease_args *ap); 584int spec_vnoperate(struct vop_generic_args *); 585int speedup_syncer(void); 586#define textvp_fullpath(p, rb, rfb) \ 587 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 588int vn_fullpath(struct thread *td, struct vnode *vn, 589 char **retbuf, char **freebuf); 590int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 591 mode_t acc_mode, struct ucred *cred, int *privused); 592int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 593 gid_t file_gid, struct acl *acl, mode_t acc_mode, 594 struct ucred *cred, int *privused); 595void vattr_null(struct vattr *vap); 596int vcount(struct vnode *vp); 597void vdrop(struct vnode *); 598int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp); 599void vfs_add_vnodeops(const void *); 600void vfs_rm_vnodeops(const void *); 601int vflush(struct mount *mp, int rootrefs, int flags); 602int vget(struct vnode *vp, int lockflag, struct thread *td); 603void vgone(struct vnode *vp); 604void vgonel(struct vnode *vp, struct thread *td); 605void vhold(struct vnode *); 606int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 607 struct thread *td, int slpflag, int slptimeo); 608int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 609 off_t length, int blksize); 610void vprint(char *label, struct vnode *vp); 611int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 612 struct thread *td); 613int vn_close(struct vnode *vp, 614 int flags, struct ucred *cred, struct thread *td); 615void vn_finished_write(struct mount *mp); 616int vn_isdisk(struct vnode *vp, int *errp); 617int vn_lock(struct vnode *vp, int flags, struct thread *td); 618#ifdef DEBUG_LOCKS 619int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 620 const char *filename, int line); 621#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 622#endif 623int vn_mkdir(char *path, int mode, enum uio_seg segflg, struct thread *td); 624int vn_open(struct nameidata *ndp, int *flagp, int cmode); 625int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 626 struct ucred *cred); 627void vn_pollevent(struct vnode *vp, int events); 628void vn_pollgone(struct vnode *vp); 629int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 630int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 631 int len, off_t offset, enum uio_seg segflg, int ioflg, 632 struct ucred *cred, int *aresid, struct thread *td); 633int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 634 int len, off_t offset, enum uio_seg segflg, int ioflg, 635 struct ucred *cred, int *aresid, struct thread *td); 636int vn_stat(struct vnode *vp, struct stat *sb, struct thread *td); 637int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 638dev_t vn_todev(struct vnode *vp); 639int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 640 int flags); 641int vn_writechk(struct vnode *vp); 642int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 643 const char *attrname, int *buflen, char *buf, struct thread *td); 644int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 645 const char *attrname, int buflen, char *buf, struct thread *td); 646int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 647 const char *attrname, struct thread *td); 648int vfs_cache_lookup(struct vop_lookup_args *ap); 649int vfs_object_create(struct vnode *vp, struct thread *td, 650 struct ucred *cred); 651void vfs_timestamp(struct timespec *); 652void vfs_write_resume(struct mount *mp); 653void vfs_write_suspend(struct mount *mp); 654int vop_stdbmap(struct vop_bmap_args *); 655int vop_stdgetwritemount(struct vop_getwritemount_args *); 656int vop_stdgetpages(struct vop_getpages_args *); 657int vop_stdinactive(struct vop_inactive_args *); 658int vop_stdislocked(struct vop_islocked_args *); 659int vop_stdlock(struct vop_lock_args *); 660int vop_stdputpages(struct vop_putpages_args *); 661int vop_stdunlock(struct vop_unlock_args *); 662int vop_noislocked(struct vop_islocked_args *); 663int vop_nolock(struct vop_lock_args *); 664int vop_nopoll(struct vop_poll_args *); 665int vop_nounlock(struct vop_unlock_args *); 666int vop_stdpathconf(struct vop_pathconf_args *); 667int vop_stdpoll(struct vop_poll_args *); 668int vop_revoke(struct vop_revoke_args *); 669int vop_sharedlock(struct vop_lock_args *); 670int vop_eopnotsupp(struct vop_generic_args *ap); 671int vop_ebadf(struct vop_generic_args *ap); 672int vop_einval(struct vop_generic_args *ap); 673int vop_enotty(struct vop_generic_args *ap); 674int vop_defaultop(struct vop_generic_args *ap); 675int vop_null(struct vop_generic_args *ap); 676int vop_panic(struct vop_generic_args *ap); 677int vop_stdcreatevobject(struct vop_createvobject_args *ap); 678int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 679int vop_stdgetvobject(struct vop_getvobject_args *ap); 680 681void vfree(struct vnode *); 682void vput(struct vnode *vp); 683void vrele(struct vnode *vp); 684void vref(struct vnode *vp); 685void vbusy(struct vnode *vp); 686void v_addpollinfo(struct vnode *vp); 687 688extern vop_t **default_vnodeop_p; 689extern vop_t **spec_vnodeop_p; 690extern vop_t **dead_vnodeop_p; 691 692#endif /* _KERNEL */ 693 694#endif /* !_SYS_VNODE_H_ */ 695