vnode.h revision 143493
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vnode.h 8.7 (Berkeley) 2/4/94 30 * $FreeBSD: head/sys/sys/vnode.h 143493 2005-03-13 11:44:02Z jeff $ 31 */ 32 33#ifndef _SYS_VNODE_H_ 34#define _SYS_VNODE_H_ 35 36/* 37 * XXX - compatability until lockmgr() goes away or all the #includes are 38 * updated. 39 */ 40#include <sys/lockmgr.h> 41 42#include <sys/bufobj.h> 43#include <sys/queue.h> 44#include <sys/_lock.h> 45#include <sys/lock.h> 46#include <sys/_mutex.h> 47#include <sys/mutex.h> 48#include <sys/selinfo.h> 49#include <sys/uio.h> 50#include <sys/acl.h> 51#include <sys/ktr.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 * Each underlying filesystem allocates its own private area and hangs 66 * it from v_data. If non-null, this area is freed in getnewvnode(). 67 */ 68 69struct namecache; 70 71struct vpollinfo { 72 struct mtx vpi_lock; /* lock to protect below */ 73 struct selinfo vpi_selinfo; /* identity of poller(s) */ 74 short vpi_events; /* what they are looking for */ 75 short vpi_revents; /* what has happened */ 76}; 77 78/* 79 * Reading or writing any of these items requires holding the appropriate lock. 80 * 81 * Lock reference: 82 * c - namecache mutex 83 * f - freelist mutex 84 * G - Giant 85 * i - interlock 86 * m - mntvnodes mutex 87 * p - pollinfo lock 88 * s - spechash mutex 89 * S - syncer mutex 90 * u - Only a reference to the vnode is needed to read. 91 * v - vnode lock 92 * 93 * Vnodes may be found on many lists. The general way to deal with operating 94 * on a vnode that is on a list is: 95 * 1) Lock the list and find the vnode. 96 * 2) Lock interlock so that the vnode does not go away. 97 * 3) Unlock the list to avoid lock order reversals. 98 * 4) vget with LK_INTERLOCK and check for ENOENT, or 99 * 5) Check for DOOMED if the vnode lock is not required. 100 * 6) Perform your operation, then vput(). 101 * 102 * XXX Not all fields are locked yet and some fields that are marked are not 103 * locked consistently. This is a work in progress. Requires Giant! 104 */ 105 106#if defined(_KERNEL) || defined(_KVM_VNODE) 107 108struct vnode { 109 /* 110 * Fields which define the identity of the vnode. These fields are 111 * owned by the filesystem (XXX: and vgone() ?) 112 */ 113 enum vtype v_type; /* u vnode type */ 114 const char *v_tag; /* u type of underlying data */ 115 struct vop_vector *v_op; /* u vnode operations vector */ 116 void *v_data; /* u private data for fs */ 117 118 /* 119 * Filesystem instance stuff 120 */ 121 struct mount *v_mount; /* u ptr to vfs we are in */ 122 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 123 124 /* 125 * Type specific fields, only one applies to any given vnode. 126 * See #defines below for renaming to v_* namespace. 127 */ 128 union { 129 struct mount *vu_mount; /* v ptr to mountpoint (VDIR) */ 130 struct socket *vu_socket; /* v unix domain net (VSOCK) */ 131 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 132 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 133 } v_un; 134 135 /* 136 * VFS_namecache stuff 137 */ 138 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 139 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 140 u_long v_id; /* c capability identifier */ 141 struct vnode *v_dd; /* c .. vnode */ 142 u_long v_ddid; /* c .. capability identifier */ 143 144 /* 145 * clustering stuff 146 */ 147 daddr_t v_cstart; /* v start block of cluster */ 148 daddr_t v_lasta; /* v last allocation */ 149 daddr_t v_lastw; /* v last write */ 150 int v_clen; /* v length of cur. cluster */ 151 152 /* 153 * Locking 154 */ 155 struct lock v_lock; /* u (if fs don't have one) */ 156 struct mtx v_interlock; /* lock for "i" things */ 157 struct lock *v_vnlock; /* u pointer to vnode lock */ 158#ifdef DEBUG_LOCKS 159 const char *filename; /* Source file doing locking */ 160 int line; /* Line number doing locking */ 161#endif 162 int v_holdcnt; /* i page & buffer references */ 163 int v_usecount; /* i ref count of users */ 164 struct thread *v_vxthread; /* i thread running vgone. */ 165 u_long v_iflag; /* i vnode flags (see below) */ 166 u_long v_vflag; /* v vnode flags */ 167 int v_writecount; /* v ref count of writers */ 168 169 /* 170 * The machinery of being a vnode 171 */ 172 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 173 struct bufobj v_bufobj; /* * Buffer cache object */ 174 175 /* 176 * Hooks for various subsystems and features. 177 */ 178 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 179 struct label *v_label; /* MAC label for vnode */ 180}; 181 182#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 183 184#define v_mountedhere v_un.vu_mount 185#define v_socket v_un.vu_socket 186#define v_rdev v_un.vu_cdev 187#define v_fifoinfo v_un.vu_fifoinfo 188 189/* XXX: These are temporary to avoid a source sweep at this time */ 190#define v_object v_bufobj.bo_object 191 192/* 193 * Userland version of struct vnode, for sysctl. 194 */ 195struct xvnode { 196 size_t xv_size; /* sizeof(struct xvnode) */ 197 void *xv_vnode; /* address of real vnode */ 198 u_long xv_flag; /* vnode vflags */ 199 int xv_usecount; /* reference count of users */ 200 int xv_writecount; /* reference count of writers */ 201 int xv_holdcnt; /* page & buffer references */ 202 u_long xv_id; /* capability identifier */ 203 void *xv_mount; /* address of parent mount */ 204 long xv_numoutput; /* num of writes in progress */ 205 enum vtype xv_type; /* vnode type */ 206 union { 207 void *xvu_socket; /* socket, if VSOCK */ 208 void *xvu_fifo; /* fifo, if VFIFO */ 209 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 210 struct { 211 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 212 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 213 } xv_uns; 214 } xv_un; 215}; 216#define xv_socket xv_un.xvu_socket 217#define xv_fifo xv_un.xvu_fifo 218#define xv_rdev xv_un.xvu_rdev 219#define xv_dev xv_un.xv_uns.xvu_dev 220#define xv_ino xv_un.xv_uns.xvu_ino 221 222#define VN_KNOTE(vp, b, a) \ 223 do { \ 224 if ((vp)->v_pollinfo != NULL) \ 225 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 226 } while (0) 227#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 228#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 229 230/* 231 * Vnode flags. 232 * VI flags are protected by interlock and live in v_iflag 233 * VV flags are protected by the vnode lock and live in v_vflag 234 */ 235#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 236#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 237#define VI_MOUNT 0x0020 /* Mount in progress */ 238#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 239#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 240#define VI_FREE 0x0100 /* This vnode is on the freelist */ 241#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 242#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 243 244#define VV_ROOT 0x0001 /* root of its filesystem */ 245#define VV_ISTTY 0x0002 /* vnode represents a tty */ 246#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 247#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 248#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 249#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 250#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 251#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 252 253/* 254 * Vnode attributes. A field value of VNOVAL represents a field whose value 255 * is unavailable (getattr) or which is not to be changed (setattr). 256 */ 257struct vattr { 258 enum vtype va_type; /* vnode type (for create) */ 259 u_short va_mode; /* files access mode and type */ 260 short va_nlink; /* number of references to file */ 261 uid_t va_uid; /* owner user id */ 262 gid_t va_gid; /* owner group id */ 263 dev_t va_fsid; /* filesystem id */ 264 long va_fileid; /* file id */ 265 u_quad_t va_size; /* file size in bytes */ 266 long va_blocksize; /* blocksize preferred for i/o */ 267 struct timespec va_atime; /* time of last access */ 268 struct timespec va_mtime; /* time of last modification */ 269 struct timespec va_ctime; /* time file changed */ 270 struct timespec va_birthtime; /* time file created */ 271 u_long va_gen; /* generation number of file */ 272 u_long va_flags; /* flags defined for file */ 273 dev_t va_rdev; /* device the special file represents */ 274 u_quad_t va_bytes; /* bytes of disk space held by file */ 275 u_quad_t va_filerev; /* file modification number */ 276 u_int va_vaflags; /* operations flags, see below */ 277 long va_spare; /* remain quad aligned */ 278}; 279 280/* 281 * Flags for va_vaflags. 282 */ 283#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 284#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 285 286/* 287 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 288 * help with write clustering) 289 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 290 */ 291#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 292#define IO_APPEND 0x0002 /* append write to end */ 293#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 294#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 295#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 296#define IO_VMIO 0x0020 /* data already in VMIO space */ 297#define IO_INVAL 0x0040 /* invalidate after I/O */ 298#define IO_SYNC 0x0080 /* do I/O synchronously */ 299#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 300#define IO_EXT 0x0400 /* operate on external attributes */ 301#define IO_NORMAL 0x0800 /* operate on regular data */ 302#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 303 304#define IO_SEQMAX 0x7F /* seq heuristic max value */ 305#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 306 307/* 308 * Modes. Some values same as Ixxx entries from inode.h for now. 309 */ 310#define VEXEC 000100 /* execute/search permission */ 311#define VWRITE 000200 /* write permission */ 312#define VREAD 000400 /* read permission */ 313#define VSVTX 001000 /* save swapped text even after use */ 314#define VSGID 002000 /* set group id on execution */ 315#define VSUID 004000 /* set user id on execution */ 316#define VADMIN 010000 /* permission to administer */ 317#define VSTAT 020000 /* permission to retrieve attrs */ 318#define VAPPEND 040000 /* permission to write/append */ 319#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 320 321/* 322 * Token indicating no attribute value yet assigned. 323 */ 324#define VNOVAL (-1) 325 326/* 327 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 328 */ 329#define VLKTIMEOUT (hz / 20 + 1) 330 331#ifdef _KERNEL 332 333#ifdef MALLOC_DECLARE 334MALLOC_DECLARE(M_VNODE); 335#endif 336 337/* 338 * Convert between vnode types and inode formats (since POSIX.1 339 * defines mode word of stat structure in terms of inode formats). 340 */ 341extern enum vtype iftovt_tab[]; 342extern int vttoif_tab[]; 343#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 344#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 345#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 346 347/* 348 * Flags to various vnode functions. 349 */ 350#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 351#define FORCECLOSE 0x0002 /* vflush: force file closure */ 352#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 353#define DOCLOSE 0x0008 /* vclean: close active files */ 354#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 355#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 356#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 357#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 358#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 359#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 360#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 361 362#define VREF(vp) vref(vp) 363 364#ifdef DIAGNOSTIC 365#define VATTR_NULL(vap) vattr_null(vap) 366#else 367#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 368#endif /* DIAGNOSTIC */ 369 370#define NULLVP ((struct vnode *)NULL) 371 372/* 373 * Global vnode data. 374 */ 375extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 376extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 377extern int desiredvnodes; /* number of vnodes desired */ 378extern struct uma_zone *namei_zone; 379extern int prtactive; /* nonzero to call vprint() */ 380extern struct vattr va_null; /* predefined null vattr structure */ 381 382/* 383 * Macro/function to check for client cache inconsistency w.r.t. leasing. 384 */ 385#define LEASE_READ 0x1 /* Check lease for readers */ 386#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 387 388extern void (*lease_updatetime)(int deltat); 389 390/* Requires interlock. */ 391#define VCANRECYCLE(vp) \ 392 (((vp)->v_iflag & VI_FREE) && \ 393 !(vp)->v_holdcnt && !(vp)->v_usecount) 394 395/* Requires interlock. */ 396#define VSHOULDFREE(vp) \ 397 (!((vp)->v_iflag & VI_FREE) && \ 398 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 399 (!(vp)->v_object || \ 400 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 401 402/* Requires interlock. */ 403#define VSHOULDBUSY(vp) \ 404 (((vp)->v_iflag & VI_FREE) && \ 405 ((vp)->v_holdcnt || (vp)->v_usecount)) 406 407#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 408#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 409#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 410#define VI_MTX(vp) (&(vp)->v_interlock) 411 412#endif /* _KERNEL */ 413 414/* 415 * Mods for extensibility. 416 */ 417 418/* 419 * Flags for vdesc_flags: 420 */ 421#define VDESC_MAX_VPS 16 422/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 423#define VDESC_VP0_WILLRELE 0x0001 424#define VDESC_VP1_WILLRELE 0x0002 425#define VDESC_VP2_WILLRELE 0x0004 426#define VDESC_VP3_WILLRELE 0x0008 427#define VDESC_NOMAP_VPP 0x0100 428#define VDESC_VPP_WILLRELE 0x0200 429 430/* 431 * A generic structure. 432 * This can be used by bypass routines to identify generic arguments. 433 */ 434struct vop_generic_args { 435 struct vnodeop_desc *a_desc; 436 /* other random data follows, presumably */ 437}; 438 439typedef int vop_bypass_t(struct vop_generic_args *); 440 441/* 442 * VDESC_NO_OFFSET is used to identify the end of the offset list 443 * and in places where no such field exists. 444 */ 445#define VDESC_NO_OFFSET -1 446 447/* 448 * This structure describes the vnode operation taking place. 449 */ 450struct vnodeop_desc { 451 char *vdesc_name; /* a readable name for debugging */ 452 int vdesc_flags; /* VDESC_* flags */ 453 vop_bypass_t *vdesc_call; /* Function to call */ 454 455 /* 456 * These ops are used by bypass routines to map and locate arguments. 457 * Creds and procs are not needed in bypass routines, but sometimes 458 * they are useful to (for example) transport layers. 459 * Nameidata is useful because it has a cred in it. 460 */ 461 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 462 int vdesc_vpp_offset; /* return vpp location */ 463 int vdesc_cred_offset; /* cred location, if any */ 464 int vdesc_thread_offset; /* thread location, if any */ 465 int vdesc_componentname_offset; /* if any */ 466 /* 467 * Finally, we've got a list of private data (about each operation) 468 * for each transport layer. (Support to manage this list is not 469 * yet part of BSD.) 470 */ 471 caddr_t *vdesc_transports; 472}; 473 474#ifdef _KERNEL 475/* 476 * A list of all the operation descs. 477 */ 478extern struct vnodeop_desc *vnodeop_descs[]; 479 480#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 481#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 482 ((s_type)(((char*)(struct_p)) + (s_offset))) 483 484 485#ifdef DEBUG_VFS_LOCKS 486/* 487 * Support code to aid in debugging VFS locking problems. Not totally 488 * reliable since if the thread sleeps between changing the lock 489 * state and checking it with the assert, some other thread could 490 * change the state. They are good enough for debugging a single 491 * filesystem using a single-threaded test. 492 */ 493void assert_vi_locked(struct vnode *vp, const char *str); 494void assert_vi_unlocked(struct vnode *vp, const char *str); 495#if 0 496void assert_vop_elocked(struct vnode *vp, const char *str); 497void assert_vop_elocked_other(struct vnode *vp, const char *str); 498#endif 499void assert_vop_locked(struct vnode *vp, const char *str); 500#if 0 501voi0 assert_vop_slocked(struct vnode *vp, const char *str); 502#endif 503void assert_vop_unlocked(struct vnode *vp, const char *str); 504 505/* These are called from within the actual VOPS. */ 506void vop_lock_pre(void *a); 507void vop_lock_post(void *a, int rc); 508void vop_lookup_post(void *a, int rc); 509void vop_lookup_pre(void *a); 510void vop_rename_pre(void *a); 511void vop_strategy_pre(void *a); 512void vop_unlock_post(void *a, int rc); 513void vop_unlock_pre(void *a); 514 515#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 516#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 517#if 0 518#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 519#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 520#endif 521#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 522#if 0 523#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 524#endif 525#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 526 527#else /* !DEBUG_VFS_LOCKS */ 528 529#define ASSERT_VI_LOCKED(vp, str) 530#define ASSERT_VI_UNLOCKED(vp, str) 531#if 0 532#define ASSERT_VOP_ELOCKED(vp, str) 533#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 534#endif 535#define ASSERT_VOP_LOCKED(vp, str) 536#if 0 537#define ASSERT_VOP_SLOCKED(vp, str) 538#endif 539#define ASSERT_VOP_UNLOCKED(vp, str) 540#endif /* DEBUG_VFS_LOCKS */ 541 542 543/* 544 * This call works for vnodes in the kernel. 545 */ 546#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 547 548/* 549 * VMIO support inline 550 */ 551 552extern int vmiodirenable; 553 554static __inline int 555vn_canvmio(struct vnode *vp) 556{ 557 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 558 return(TRUE); 559 return(FALSE); 560} 561 562/* 563 * Finally, include the default set of vnode operations. 564 */ 565#include "vnode_if.h" 566 567/* 568 * Public vnode manipulation functions. 569 */ 570struct componentname; 571struct file; 572struct mount; 573struct nameidata; 574struct ostat; 575struct thread; 576struct proc; 577struct stat; 578struct nstat; 579struct ucred; 580struct uio; 581struct vattr; 582struct vnode; 583 584extern int (*lease_check_hook)(struct vop_lease_args *); 585extern int (*softdep_process_worklist_hook)(struct mount *); 586 587/* cache_* may belong in namei.h. */ 588void cache_enter(struct vnode *dvp, struct vnode *vp, 589 struct componentname *cnp); 590int cache_lookup(struct vnode *dvp, struct vnode **vpp, 591 struct componentname *cnp); 592void cache_purge(struct vnode *vp); 593void cache_purgevfs(struct mount *mp); 594int cache_leaf_test(struct vnode *vp); 595int change_dir(struct vnode *vp, struct thread *td); 596int change_root(struct vnode *vp, struct thread *td); 597void cvtstat(struct stat *st, struct ostat *ost); 598void cvtnstat(struct stat *sb, struct nstat *nsb); 599int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 600 struct vnode **vpp); 601u_quad_t init_va_filerev(void); 602int lease_check(struct vop_lease_args *ap); 603int speedup_syncer(void); 604#define textvp_fullpath(p, rb, rfb) \ 605 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 606int vn_fullpath(struct thread *td, struct vnode *vn, 607 char **retbuf, char **freebuf); 608int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 609 mode_t acc_mode, struct ucred *cred, int *privused); 610int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 611 gid_t file_gid, struct acl *acl, mode_t acc_mode, 612 struct ucred *cred, int *privused); 613void vattr_null(struct vattr *vap); 614int vcount(struct vnode *vp); 615void vdrop(struct vnode *); 616void vfs_add_vnodeops(const void *); 617void vfs_rm_vnodeops(const void *); 618int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 619int vget(struct vnode *vp, int lockflag, struct thread *td); 620void vgone(struct vnode *vp); 621void vgonel(struct vnode *vp, struct thread *td); 622void vhold(struct vnode *); 623int vinvalbuf(struct vnode *vp, int save, 624 struct thread *td, int slpflag, int slptimeo); 625int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 626 off_t length, int blksize); 627void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); 628#define vprint(label, vp) vn_printf((vp), "%s\n", (label)) 629int vrecycle(struct vnode *vp, struct thread *td); 630int vn_close(struct vnode *vp, 631 int flags, struct ucred *file_cred, struct thread *td); 632void vn_finished_write(struct mount *mp); 633int vn_isdisk(struct vnode *vp, int *errp); 634int vn_lock(struct vnode *vp, int flags, struct thread *td); 635#ifdef DEBUG_LOCKS 636int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 637 const char *filename, int line); 638#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 639#endif 640int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 641int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 642 struct ucred *cred, int fdidx); 643int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 644int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 645 int len, off_t offset, enum uio_seg segflg, int ioflg, 646 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 647 struct thread *td); 648int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 649 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 650 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 651 struct thread *td); 652int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 653 struct ucred *file_cred, struct thread *td); 654int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 655int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 656 int flags); 657int vn_writechk(struct vnode *vp); 658int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 659 const char *attrname, int *buflen, char *buf, struct thread *td); 660int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 661 const char *attrname, int buflen, char *buf, struct thread *td); 662int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 663 const char *attrname, struct thread *td); 664int vfs_cache_lookup(struct vop_lookup_args *ap); 665void vfs_timestamp(struct timespec *); 666void vfs_write_resume(struct mount *mp); 667int vfs_write_suspend(struct mount *mp); 668int vop_stdbmap(struct vop_bmap_args *); 669int vop_stdfsync(struct vop_fsync_args *); 670int vop_stdgetwritemount(struct vop_getwritemount_args *); 671int vop_stdgetpages(struct vop_getpages_args *); 672int vop_stdinactive(struct vop_inactive_args *); 673int vop_stdislocked(struct vop_islocked_args *); 674int vop_stdlock(struct vop_lock_args *); 675int vop_stdputpages(struct vop_putpages_args *); 676int vop_stdunlock(struct vop_unlock_args *); 677int vop_nopoll(struct vop_poll_args *); 678int vop_stdpathconf(struct vop_pathconf_args *); 679int vop_stdpoll(struct vop_poll_args *); 680int vop_eopnotsupp(struct vop_generic_args *ap); 681int vop_ebadf(struct vop_generic_args *ap); 682int vop_einval(struct vop_generic_args *ap); 683int vop_enotty(struct vop_generic_args *ap); 684int vop_null(struct vop_generic_args *ap); 685int vop_panic(struct vop_generic_args *ap); 686 687void vfree(struct vnode *); 688void vput(struct vnode *vp); 689void vrele(struct vnode *vp); 690void vref(struct vnode *vp); 691int vrefcnt(struct vnode *vp); 692void v_addpollinfo(struct vnode *vp); 693 694int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td); 695void vnode_destroy_vobject(struct vnode *vp); 696 697extern struct vop_vector fifo_specops; 698extern struct vop_vector dead_vnodeops; 699extern struct vop_vector default_vnodeops; 700 701#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 702#define VOP_NULL ((void*)(uintptr_t)vop_null) 703#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 704#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 705#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 706#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 707 708 709#endif /* _KERNEL */ 710 711#endif /* !_SYS_VNODE_H_ */ 712