vnode.h revision 143560
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 143560 2005-03-14 09:25:19Z 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 prevents recycling. */ 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_MOUNT 0x0020 /* Mount in progress */ 236#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 237#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 238#define VI_FREE 0x0100 /* This vnode is on the freelist */ 239#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 240#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 241 242#define VV_ROOT 0x0001 /* root of its filesystem */ 243#define VV_ISTTY 0x0002 /* vnode represents a tty */ 244#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 245#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 246#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 247#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 248#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 249#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 250 251/* 252 * Vnode attributes. A field value of VNOVAL represents a field whose value 253 * is unavailable (getattr) or which is not to be changed (setattr). 254 */ 255struct vattr { 256 enum vtype va_type; /* vnode type (for create) */ 257 u_short va_mode; /* files access mode and type */ 258 short va_nlink; /* number of references to file */ 259 uid_t va_uid; /* owner user id */ 260 gid_t va_gid; /* owner group id */ 261 dev_t va_fsid; /* filesystem id */ 262 long va_fileid; /* file id */ 263 u_quad_t va_size; /* file size in bytes */ 264 long va_blocksize; /* blocksize preferred for i/o */ 265 struct timespec va_atime; /* time of last access */ 266 struct timespec va_mtime; /* time of last modification */ 267 struct timespec va_ctime; /* time file changed */ 268 struct timespec va_birthtime; /* time file created */ 269 u_long va_gen; /* generation number of file */ 270 u_long va_flags; /* flags defined for file */ 271 dev_t va_rdev; /* device the special file represents */ 272 u_quad_t va_bytes; /* bytes of disk space held by file */ 273 u_quad_t va_filerev; /* file modification number */ 274 u_int va_vaflags; /* operations flags, see below */ 275 long va_spare; /* remain quad aligned */ 276}; 277 278/* 279 * Flags for va_vaflags. 280 */ 281#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 282#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 283 284/* 285 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 286 * help with write clustering) 287 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 288 */ 289#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 290#define IO_APPEND 0x0002 /* append write to end */ 291#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 292#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 293#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 294#define IO_VMIO 0x0020 /* data already in VMIO space */ 295#define IO_INVAL 0x0040 /* invalidate after I/O */ 296#define IO_SYNC 0x0080 /* do I/O synchronously */ 297#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 298#define IO_EXT 0x0400 /* operate on external attributes */ 299#define IO_NORMAL 0x0800 /* operate on regular data */ 300#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 301 302#define IO_SEQMAX 0x7F /* seq heuristic max value */ 303#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 304 305/* 306 * Modes. Some values same as Ixxx entries from inode.h for now. 307 */ 308#define VEXEC 000100 /* execute/search permission */ 309#define VWRITE 000200 /* write permission */ 310#define VREAD 000400 /* read permission */ 311#define VSVTX 001000 /* save swapped text even after use */ 312#define VSGID 002000 /* set group id on execution */ 313#define VSUID 004000 /* set user id on execution */ 314#define VADMIN 010000 /* permission to administer */ 315#define VSTAT 020000 /* permission to retrieve attrs */ 316#define VAPPEND 040000 /* permission to write/append */ 317#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 318 319/* 320 * Token indicating no attribute value yet assigned. 321 */ 322#define VNOVAL (-1) 323 324/* 325 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 326 */ 327#define VLKTIMEOUT (hz / 20 + 1) 328 329#ifdef _KERNEL 330 331#ifdef MALLOC_DECLARE 332MALLOC_DECLARE(M_VNODE); 333#endif 334 335/* 336 * Convert between vnode types and inode formats (since POSIX.1 337 * defines mode word of stat structure in terms of inode formats). 338 */ 339extern enum vtype iftovt_tab[]; 340extern int vttoif_tab[]; 341#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 342#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 343#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 344 345/* 346 * Flags to various vnode functions. 347 */ 348#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 349#define FORCECLOSE 0x0002 /* vflush: force file closure */ 350#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 351#define DOCLOSE 0x0008 /* vclean: close active files */ 352#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 353#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 354#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 355#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 356#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 357#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 358#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 359 360#define VREF(vp) vref(vp) 361 362#ifdef DIAGNOSTIC 363#define VATTR_NULL(vap) vattr_null(vap) 364#else 365#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 366#endif /* DIAGNOSTIC */ 367 368#define NULLVP ((struct vnode *)NULL) 369 370/* 371 * Global vnode data. 372 */ 373extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 374extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 375extern int desiredvnodes; /* number of vnodes desired */ 376extern struct uma_zone *namei_zone; 377extern int prtactive; /* nonzero to call vprint() */ 378extern struct vattr va_null; /* predefined null vattr structure */ 379 380/* 381 * Macro/function to check for client cache inconsistency w.r.t. leasing. 382 */ 383#define LEASE_READ 0x1 /* Check lease for readers */ 384#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 385 386extern void (*lease_updatetime)(int deltat); 387 388/* Requires interlock. */ 389#define VCANRECYCLE(vp) \ 390 (((vp)->v_iflag & VI_FREE) && !(vp)->v_holdcnt) 391 392/* Requires interlock. */ 393#define VSHOULDFREE(vp) \ 394 (!((vp)->v_iflag & VI_FREE) && !(vp)->v_holdcnt && \ 395 (!(vp)->v_object || !(vp)->v_object->resident_page_count)) 396 397/* Requires interlock. */ 398#define VSHOULDBUSY(vp) \ 399 (((vp)->v_iflag & VI_FREE) && (vp)->v_holdcnt) 400 401#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 402#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 403#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 404#define VI_MTX(vp) (&(vp)->v_interlock) 405 406#endif /* _KERNEL */ 407 408/* 409 * Mods for extensibility. 410 */ 411 412/* 413 * Flags for vdesc_flags: 414 */ 415#define VDESC_MAX_VPS 16 416/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 417#define VDESC_VP0_WILLRELE 0x0001 418#define VDESC_VP1_WILLRELE 0x0002 419#define VDESC_VP2_WILLRELE 0x0004 420#define VDESC_VP3_WILLRELE 0x0008 421#define VDESC_NOMAP_VPP 0x0100 422#define VDESC_VPP_WILLRELE 0x0200 423 424/* 425 * A generic structure. 426 * This can be used by bypass routines to identify generic arguments. 427 */ 428struct vop_generic_args { 429 struct vnodeop_desc *a_desc; 430 /* other random data follows, presumably */ 431}; 432 433typedef int vop_bypass_t(struct vop_generic_args *); 434 435/* 436 * VDESC_NO_OFFSET is used to identify the end of the offset list 437 * and in places where no such field exists. 438 */ 439#define VDESC_NO_OFFSET -1 440 441/* 442 * This structure describes the vnode operation taking place. 443 */ 444struct vnodeop_desc { 445 char *vdesc_name; /* a readable name for debugging */ 446 int vdesc_flags; /* VDESC_* flags */ 447 vop_bypass_t *vdesc_call; /* Function to call */ 448 449 /* 450 * These ops are used by bypass routines to map and locate arguments. 451 * Creds and procs are not needed in bypass routines, but sometimes 452 * they are useful to (for example) transport layers. 453 * Nameidata is useful because it has a cred in it. 454 */ 455 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 456 int vdesc_vpp_offset; /* return vpp location */ 457 int vdesc_cred_offset; /* cred location, if any */ 458 int vdesc_thread_offset; /* thread location, if any */ 459 int vdesc_componentname_offset; /* if any */ 460 /* 461 * Finally, we've got a list of private data (about each operation) 462 * for each transport layer. (Support to manage this list is not 463 * yet part of BSD.) 464 */ 465 caddr_t *vdesc_transports; 466}; 467 468#ifdef _KERNEL 469/* 470 * A list of all the operation descs. 471 */ 472extern struct vnodeop_desc *vnodeop_descs[]; 473 474#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 475#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 476 ((s_type)(((char*)(struct_p)) + (s_offset))) 477 478 479#ifdef DEBUG_VFS_LOCKS 480/* 481 * Support code to aid in debugging VFS locking problems. Not totally 482 * reliable since if the thread sleeps between changing the lock 483 * state and checking it with the assert, some other thread could 484 * change the state. They are good enough for debugging a single 485 * filesystem using a single-threaded test. 486 */ 487void assert_vi_locked(struct vnode *vp, const char *str); 488void assert_vi_unlocked(struct vnode *vp, const char *str); 489#if 0 490void assert_vop_elocked(struct vnode *vp, const char *str); 491void assert_vop_elocked_other(struct vnode *vp, const char *str); 492#endif 493void assert_vop_locked(struct vnode *vp, const char *str); 494#if 0 495voi0 assert_vop_slocked(struct vnode *vp, const char *str); 496#endif 497void assert_vop_unlocked(struct vnode *vp, const char *str); 498 499/* These are called from within the actual VOPS. */ 500void vop_lock_pre(void *a); 501void vop_lock_post(void *a, int rc); 502void vop_lookup_post(void *a, int rc); 503void vop_lookup_pre(void *a); 504void vop_rename_pre(void *a); 505void vop_strategy_pre(void *a); 506void vop_unlock_post(void *a, int rc); 507void vop_unlock_pre(void *a); 508 509#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 510#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 511#if 0 512#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 513#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 514#endif 515#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 516#if 0 517#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 518#endif 519#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 520 521#else /* !DEBUG_VFS_LOCKS */ 522 523#define ASSERT_VI_LOCKED(vp, str) 524#define ASSERT_VI_UNLOCKED(vp, str) 525#if 0 526#define ASSERT_VOP_ELOCKED(vp, str) 527#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 528#endif 529#define ASSERT_VOP_LOCKED(vp, str) 530#if 0 531#define ASSERT_VOP_SLOCKED(vp, str) 532#endif 533#define ASSERT_VOP_UNLOCKED(vp, str) 534#endif /* DEBUG_VFS_LOCKS */ 535 536 537/* 538 * This call works for vnodes in the kernel. 539 */ 540#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 541 542/* 543 * VMIO support inline 544 */ 545 546extern int vmiodirenable; 547 548static __inline int 549vn_canvmio(struct vnode *vp) 550{ 551 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 552 return(TRUE); 553 return(FALSE); 554} 555 556/* 557 * Finally, include the default set of vnode operations. 558 */ 559#include "vnode_if.h" 560 561/* 562 * Public vnode manipulation functions. 563 */ 564struct componentname; 565struct file; 566struct mount; 567struct nameidata; 568struct ostat; 569struct thread; 570struct proc; 571struct stat; 572struct nstat; 573struct ucred; 574struct uio; 575struct vattr; 576struct vnode; 577 578extern int (*lease_check_hook)(struct vop_lease_args *); 579extern int (*softdep_process_worklist_hook)(struct mount *); 580 581/* cache_* may belong in namei.h. */ 582void cache_enter(struct vnode *dvp, struct vnode *vp, 583 struct componentname *cnp); 584int cache_lookup(struct vnode *dvp, struct vnode **vpp, 585 struct componentname *cnp); 586void cache_purge(struct vnode *vp); 587void cache_purgevfs(struct mount *mp); 588int cache_leaf_test(struct vnode *vp); 589int change_dir(struct vnode *vp, struct thread *td); 590int change_root(struct vnode *vp, struct thread *td); 591void cvtstat(struct stat *st, struct ostat *ost); 592void cvtnstat(struct stat *sb, struct nstat *nsb); 593int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 594 struct vnode **vpp); 595u_quad_t init_va_filerev(void); 596int lease_check(struct vop_lease_args *ap); 597int speedup_syncer(void); 598#define textvp_fullpath(p, rb, rfb) \ 599 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 600int vn_fullpath(struct thread *td, struct vnode *vn, 601 char **retbuf, char **freebuf); 602int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 603 mode_t acc_mode, struct ucred *cred, int *privused); 604int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 605 gid_t file_gid, struct acl *acl, mode_t acc_mode, 606 struct ucred *cred, int *privused); 607void vattr_null(struct vattr *vap); 608int vcount(struct vnode *vp); 609void vdrop(struct vnode *); 610void vfs_add_vnodeops(const void *); 611void vfs_rm_vnodeops(const void *); 612int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 613int vget(struct vnode *vp, int lockflag, struct thread *td); 614void vgone(struct vnode *vp); 615void vgonel(struct vnode *vp, struct thread *td); 616void vhold(struct vnode *); 617int vinvalbuf(struct vnode *vp, int save, 618 struct thread *td, int slpflag, int slptimeo); 619int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 620 off_t length, int blksize); 621void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); 622#define vprint(label, vp) vn_printf((vp), "%s\n", (label)) 623int vrecycle(struct vnode *vp, struct thread *td); 624int vn_close(struct vnode *vp, 625 int flags, struct ucred *file_cred, struct thread *td); 626void vn_finished_write(struct mount *mp); 627int vn_isdisk(struct vnode *vp, int *errp); 628int vn_lock(struct vnode *vp, int flags, struct thread *td); 629#ifdef DEBUG_LOCKS 630int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 631 const char *filename, int line); 632#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 633#endif 634int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 635int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 636 struct ucred *cred, int fdidx); 637int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 638int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 639 int len, off_t offset, enum uio_seg segflg, int ioflg, 640 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 641 struct thread *td); 642int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 643 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 644 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 645 struct thread *td); 646int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 647 struct ucred *file_cred, struct thread *td); 648int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 649int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 650 int flags); 651int vn_writechk(struct vnode *vp); 652int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 653 const char *attrname, int *buflen, char *buf, struct thread *td); 654int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 655 const char *attrname, int buflen, char *buf, struct thread *td); 656int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 657 const char *attrname, struct thread *td); 658int vfs_cache_lookup(struct vop_lookup_args *ap); 659void vfs_timestamp(struct timespec *); 660void vfs_write_resume(struct mount *mp); 661int vfs_write_suspend(struct mount *mp); 662int vop_stdbmap(struct vop_bmap_args *); 663int vop_stdfsync(struct vop_fsync_args *); 664int vop_stdgetwritemount(struct vop_getwritemount_args *); 665int vop_stdgetpages(struct vop_getpages_args *); 666int vop_stdinactive(struct vop_inactive_args *); 667int vop_stdislocked(struct vop_islocked_args *); 668int vop_stdlock(struct vop_lock_args *); 669int vop_stdputpages(struct vop_putpages_args *); 670int vop_stdunlock(struct vop_unlock_args *); 671int vop_nopoll(struct vop_poll_args *); 672int vop_stdpathconf(struct vop_pathconf_args *); 673int vop_stdpoll(struct vop_poll_args *); 674int vop_eopnotsupp(struct vop_generic_args *ap); 675int vop_ebadf(struct vop_generic_args *ap); 676int vop_einval(struct vop_generic_args *ap); 677int vop_enotty(struct vop_generic_args *ap); 678int vop_null(struct vop_generic_args *ap); 679int vop_panic(struct vop_generic_args *ap); 680 681void vfree(struct vnode *); 682void vput(struct vnode *vp); 683void vrele(struct vnode *vp); 684void vref(struct vnode *vp); 685int vrefcnt(struct vnode *vp); 686void v_addpollinfo(struct vnode *vp); 687 688int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td); 689void vnode_destroy_vobject(struct vnode *vp); 690 691extern struct vop_vector fifo_specops; 692extern struct vop_vector dead_vnodeops; 693extern struct vop_vector default_vnodeops; 694 695#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 696#define VOP_NULL ((void*)(uintptr_t)vop_null) 697#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 698#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 699#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 700#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 701 702 703#endif /* _KERNEL */ 704 705#endif /* !_SYS_VNODE_H_ */ 706