vnode.h revision 146829
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 146829 2005-05-31 19:39:52Z kensmith $ 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_hash: (mount + inode) -> vnode hash. 137 */ 138 LIST_ENTRY(vnode) v_hashlist; 139 u_int v_hash; 140 141 /* 142 * VFS_namecache stuff 143 */ 144 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 145 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 146 struct vnode *v_dd; /* c .. vnode */ 147 148 /* 149 * clustering stuff 150 */ 151 daddr_t v_cstart; /* v start block of cluster */ 152 daddr_t v_lasta; /* v last allocation */ 153 daddr_t v_lastw; /* v last write */ 154 int v_clen; /* v length of cur. cluster */ 155 156 /* 157 * Locking 158 */ 159 struct lock v_lock; /* u (if fs don't have one) */ 160 struct mtx v_interlock; /* lock for "i" things */ 161 struct lock *v_vnlock; /* u pointer to vnode lock */ 162#ifdef DEBUG_LOCKS 163 const char *filename; /* Source file doing locking */ 164 int line; /* Line number doing locking */ 165#endif 166 int v_holdcnt; /* i prevents recycling. */ 167 int v_usecount; /* i ref count of users */ 168 u_long v_iflag; /* i vnode flags (see below) */ 169 u_long v_vflag; /* v vnode flags */ 170 int v_writecount; /* v ref count of writers */ 171 172 /* 173 * The machinery of being a vnode 174 */ 175 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 176 struct bufobj v_bufobj; /* * Buffer cache object */ 177 178 /* 179 * Hooks for various subsystems and features. 180 */ 181 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 182 struct label *v_label; /* MAC label for vnode */ 183}; 184 185#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 186 187#define v_mountedhere v_un.vu_mount 188#define v_socket v_un.vu_socket 189#define v_rdev v_un.vu_cdev 190#define v_fifoinfo v_un.vu_fifoinfo 191 192/* XXX: These are temporary to avoid a source sweep at this time */ 193#define v_object v_bufobj.bo_object 194 195/* 196 * Userland version of struct vnode, for sysctl. 197 */ 198struct xvnode { 199 size_t xv_size; /* sizeof(struct xvnode) */ 200 void *xv_vnode; /* address of real vnode */ 201 u_long xv_flag; /* vnode vflags */ 202 int xv_usecount; /* reference count of users */ 203 int xv_writecount; /* reference count of writers */ 204 int xv_holdcnt; /* page & buffer references */ 205 u_long xv_id; /* capability identifier */ 206 void *xv_mount; /* address of parent mount */ 207 long xv_numoutput; /* num of writes in progress */ 208 enum vtype xv_type; /* vnode type */ 209 union { 210 void *xvu_socket; /* socket, if VSOCK */ 211 void *xvu_fifo; /* fifo, if VFIFO */ 212 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 213 struct { 214 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 215 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 216 } xv_uns; 217 } xv_un; 218}; 219#define xv_socket xv_un.xvu_socket 220#define xv_fifo xv_un.xvu_fifo 221#define xv_rdev xv_un.xvu_rdev 222#define xv_dev xv_un.xv_uns.xvu_dev 223#define xv_ino xv_un.xv_uns.xvu_ino 224 225#define VN_KNOTE(vp, b, a) \ 226 do { \ 227 if ((vp)->v_pollinfo != NULL) \ 228 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 229 } while (0) 230#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 231#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 232 233/* 234 * Vnode flags. 235 * VI flags are protected by interlock and live in v_iflag 236 * VV flags are protected by the vnode lock and live in v_vflag 237 */ 238#define VI_MOUNT 0x0020 /* Mount in progress */ 239#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 240#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 241#define VI_FREE 0x0100 /* This vnode is on the freelist */ 242#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 243#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 244#define VI_OWEINACT 0x1000 /* Need to call inactive */ 245 246#define VV_ROOT 0x0001 /* root of its filesystem */ 247#define VV_ISTTY 0x0002 /* vnode represents a tty */ 248#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 249#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 250#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 251#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 252#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 253#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 254 255/* 256 * Vnode attributes. A field value of VNOVAL represents a field whose value 257 * is unavailable (getattr) or which is not to be changed (setattr). 258 */ 259struct vattr { 260 enum vtype va_type; /* vnode type (for create) */ 261 u_short va_mode; /* files access mode and type */ 262 short va_nlink; /* number of references to file */ 263 uid_t va_uid; /* owner user id */ 264 gid_t va_gid; /* owner group id */ 265 dev_t va_fsid; /* filesystem id */ 266 long va_fileid; /* file id */ 267 u_quad_t va_size; /* file size in bytes */ 268 long va_blocksize; /* blocksize preferred for i/o */ 269 struct timespec va_atime; /* time of last access */ 270 struct timespec va_mtime; /* time of last modification */ 271 struct timespec va_ctime; /* time file changed */ 272 struct timespec va_birthtime; /* time file created */ 273 u_long va_gen; /* generation number of file */ 274 u_long va_flags; /* flags defined for file */ 275 dev_t va_rdev; /* device the special file represents */ 276 u_quad_t va_bytes; /* bytes of disk space held by file */ 277 u_quad_t va_filerev; /* file modification number */ 278 u_int va_vaflags; /* operations flags, see below */ 279 long va_spare; /* remain quad aligned */ 280}; 281 282/* 283 * Flags for va_vaflags. 284 */ 285#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 286#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 287#define VA_EXECVE_ATIME 0x04 /* setting atime for execve */ 288 289/* 290 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 291 * help with write clustering) 292 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 293 */ 294#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 295#define IO_APPEND 0x0002 /* append write to end */ 296#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 297#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 298#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 299#define IO_VMIO 0x0020 /* data already in VMIO space */ 300#define IO_INVAL 0x0040 /* invalidate after I/O */ 301#define IO_SYNC 0x0080 /* do I/O synchronously */ 302#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 303#define IO_EXT 0x0400 /* operate on external attributes */ 304#define IO_NORMAL 0x0800 /* operate on regular data */ 305#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 306 307#define IO_SEQMAX 0x7F /* seq heuristic max value */ 308#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 309 310/* 311 * Modes. Some values same as Ixxx entries from inode.h for now. 312 */ 313#define VEXEC 000100 /* execute/search permission */ 314#define VWRITE 000200 /* write permission */ 315#define VREAD 000400 /* read permission */ 316#define VSVTX 001000 /* save swapped text even after use */ 317#define VSGID 002000 /* set group id on execution */ 318#define VSUID 004000 /* set user id on execution */ 319#define VADMIN 010000 /* permission to administer */ 320#define VSTAT 020000 /* permission to retrieve attrs */ 321#define VAPPEND 040000 /* permission to write/append */ 322#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 323 324/* 325 * Token indicating no attribute value yet assigned. 326 */ 327#define VNOVAL (-1) 328 329/* 330 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 331 */ 332#define VLKTIMEOUT (hz / 20 + 1) 333 334#ifdef _KERNEL 335 336#ifdef MALLOC_DECLARE 337MALLOC_DECLARE(M_VNODE); 338#endif 339 340/* 341 * Convert between vnode types and inode formats (since POSIX.1 342 * defines mode word of stat structure in terms of inode formats). 343 */ 344extern enum vtype iftovt_tab[]; 345extern int vttoif_tab[]; 346#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 347#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 348#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 349 350/* 351 * Flags to various vnode functions. 352 */ 353#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 354#define FORCECLOSE 0x0002 /* vflush: force file closure */ 355#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 356#define DOCLOSE 0x0008 /* vclean: close active files */ 357#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 358#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 359#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 360#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 361#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 362#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 363#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 364 365#define VREF(vp) vref(vp) 366 367#ifdef DIAGNOSTIC 368#define VATTR_NULL(vap) vattr_null(vap) 369#else 370#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 371#endif /* DIAGNOSTIC */ 372 373#define NULLVP ((struct vnode *)NULL) 374 375/* 376 * Global vnode data. 377 */ 378extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 379extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 380extern int desiredvnodes; /* number of vnodes desired */ 381extern struct uma_zone *namei_zone; 382extern int prtactive; /* nonzero to call vprint() */ 383extern struct vattr va_null; /* predefined null vattr structure */ 384 385/* 386 * Macro/function to check for client cache inconsistency w.r.t. leasing. 387 */ 388#define LEASE_READ 0x1 /* Check lease for readers */ 389#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 390 391extern void (*lease_updatetime)(int deltat); 392 393#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 394#define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags)) 395#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 396#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 397#define VI_MTX(vp) (&(vp)->v_interlock) 398 399#endif /* _KERNEL */ 400 401/* 402 * Mods for extensibility. 403 */ 404 405/* 406 * Flags for vdesc_flags: 407 */ 408#define VDESC_MAX_VPS 16 409/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 410#define VDESC_VP0_WILLRELE 0x0001 411#define VDESC_VP1_WILLRELE 0x0002 412#define VDESC_VP2_WILLRELE 0x0004 413#define VDESC_VP3_WILLRELE 0x0008 414#define VDESC_NOMAP_VPP 0x0100 415#define VDESC_VPP_WILLRELE 0x0200 416 417/* 418 * A generic structure. 419 * This can be used by bypass routines to identify generic arguments. 420 */ 421struct vop_generic_args { 422 struct vnodeop_desc *a_desc; 423 /* other random data follows, presumably */ 424}; 425 426typedef int vop_bypass_t(struct vop_generic_args *); 427 428/* 429 * VDESC_NO_OFFSET is used to identify the end of the offset list 430 * and in places where no such field exists. 431 */ 432#define VDESC_NO_OFFSET -1 433 434/* 435 * This structure describes the vnode operation taking place. 436 */ 437struct vnodeop_desc { 438 char *vdesc_name; /* a readable name for debugging */ 439 int vdesc_flags; /* VDESC_* flags */ 440 vop_bypass_t *vdesc_call; /* Function to call */ 441 442 /* 443 * These ops are used by bypass routines to map and locate arguments. 444 * Creds and procs are not needed in bypass routines, but sometimes 445 * they are useful to (for example) transport layers. 446 * Nameidata is useful because it has a cred in it. 447 */ 448 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 449 int vdesc_vpp_offset; /* return vpp location */ 450 int vdesc_cred_offset; /* cred location, if any */ 451 int vdesc_thread_offset; /* thread location, if any */ 452 int vdesc_componentname_offset; /* if any */ 453 /* 454 * Finally, we've got a list of private data (about each operation) 455 * for each transport layer. (Support to manage this list is not 456 * yet part of BSD.) 457 */ 458 caddr_t *vdesc_transports; 459}; 460 461#ifdef _KERNEL 462/* 463 * A list of all the operation descs. 464 */ 465extern struct vnodeop_desc *vnodeop_descs[]; 466 467#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 468#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 469 ((s_type)(((char*)(struct_p)) + (s_offset))) 470 471 472#ifdef DEBUG_VFS_LOCKS 473/* 474 * Support code to aid in debugging VFS locking problems. Not totally 475 * reliable since if the thread sleeps between changing the lock 476 * state and checking it with the assert, some other thread could 477 * change the state. They are good enough for debugging a single 478 * filesystem using a single-threaded test. 479 */ 480void assert_vi_locked(struct vnode *vp, const char *str); 481void assert_vi_unlocked(struct vnode *vp, const char *str); 482void assert_vop_elocked(struct vnode *vp, const char *str); 483#if 0 484void assert_vop_elocked_other(struct vnode *vp, const char *str); 485#endif 486void assert_vop_locked(struct vnode *vp, const char *str); 487#if 0 488voi0 assert_vop_slocked(struct vnode *vp, const char *str); 489#endif 490void assert_vop_unlocked(struct vnode *vp, const char *str); 491 492/* These are called from within the actual VOPS. */ 493void vop_lock_pre(void *a); 494void vop_lock_post(void *a, int rc); 495void vop_lookup_post(void *a, int rc); 496void vop_lookup_pre(void *a); 497void vop_rename_pre(void *a); 498void vop_strategy_pre(void *a); 499void vop_unlock_post(void *a, int rc); 500void vop_unlock_pre(void *a); 501 502#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 503#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 504#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 505#if 0 506#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 507#endif 508#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 509#if 0 510#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 511#endif 512#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 513 514#else /* !DEBUG_VFS_LOCKS */ 515 516#define ASSERT_VI_LOCKED(vp, str) 517#define ASSERT_VI_UNLOCKED(vp, str) 518#define ASSERT_VOP_ELOCKED(vp, str) 519#if 0 520#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 521#endif 522#define ASSERT_VOP_LOCKED(vp, str) 523#if 0 524#define ASSERT_VOP_SLOCKED(vp, str) 525#endif 526#define ASSERT_VOP_UNLOCKED(vp, str) 527#endif /* DEBUG_VFS_LOCKS */ 528 529 530/* 531 * This call works for vnodes in the kernel. 532 */ 533#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 534 535/* 536 * VMIO support inline 537 */ 538 539extern int vmiodirenable; 540 541static __inline int 542vn_canvmio(struct vnode *vp) 543{ 544 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 545 return(TRUE); 546 return(FALSE); 547} 548 549/* 550 * Finally, include the default set of vnode operations. 551 */ 552#include "vnode_if.h" 553 554/* 555 * Public vnode manipulation functions. 556 */ 557struct componentname; 558struct file; 559struct mount; 560struct nameidata; 561struct ostat; 562struct thread; 563struct proc; 564struct stat; 565struct nstat; 566struct ucred; 567struct uio; 568struct vattr; 569struct vnode; 570 571extern int (*lease_check_hook)(struct vop_lease_args *); 572extern int (*softdep_process_worklist_hook)(struct mount *); 573 574/* cache_* may belong in namei.h. */ 575void cache_enter(struct vnode *dvp, struct vnode *vp, 576 struct componentname *cnp); 577int cache_lookup(struct vnode *dvp, struct vnode **vpp, 578 struct componentname *cnp); 579void cache_purge(struct vnode *vp); 580void cache_purgevfs(struct mount *mp); 581int cache_leaf_test(struct vnode *vp); 582int change_dir(struct vnode *vp, struct thread *td); 583int change_root(struct vnode *vp, struct thread *td); 584void cvtstat(struct stat *st, struct ostat *ost); 585void cvtnstat(struct stat *sb, struct nstat *nsb); 586int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 587 struct vnode **vpp); 588u_quad_t init_va_filerev(void); 589int lease_check(struct vop_lease_args *ap); 590int speedup_syncer(void); 591#define textvp_fullpath(p, rb, rfb) \ 592 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 593int vn_fullpath(struct thread *td, struct vnode *vn, 594 char **retbuf, char **freebuf); 595int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 596 mode_t acc_mode, struct ucred *cred, int *privused); 597int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 598 gid_t file_gid, struct acl *acl, mode_t acc_mode, 599 struct ucred *cred, int *privused); 600void vattr_null(struct vattr *vap); 601int vcount(struct vnode *vp); 602void vdrop(struct vnode *); 603void vfs_add_vnodeops(const void *); 604void vfs_rm_vnodeops(const void *); 605int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 606int vget(struct vnode *vp, int lockflag, struct thread *td); 607void vgone(struct vnode *vp); 608void vgonel(struct vnode *vp, struct thread *td); 609void vhold(struct vnode *); 610void vholdl(struct vnode *); 611int vinvalbuf(struct vnode *vp, int save, 612 struct thread *td, int slpflag, int slptimeo); 613int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 614 off_t length, int blksize); 615void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); 616#define vprint(label, vp) vn_printf((vp), "%s\n", (label)) 617int vrecycle(struct vnode *vp, struct thread *td); 618int vn_close(struct vnode *vp, 619 int flags, struct ucred *file_cred, struct thread *td); 620void vn_finished_write(struct mount *mp); 621int vn_isdisk(struct vnode *vp, int *errp); 622int vn_lock(struct vnode *vp, int flags, struct thread *td); 623#ifdef DEBUG_LOCKS 624int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 625 const char *filename, int line); 626#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 627#endif 628int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 629int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 630 struct ucred *cred, int fdidx); 631int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 632int vn_rdwr(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 *active_cred, struct ucred *file_cred, int *aresid, 635 struct thread *td); 636int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 637 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 638 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 639 struct thread *td); 640int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 641 struct ucred *file_cred, struct thread *td); 642int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 643int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 644 int flags); 645int vn_writechk(struct vnode *vp); 646int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 647 const char *attrname, int *buflen, char *buf, struct thread *td); 648int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 649 const char *attrname, int buflen, char *buf, struct thread *td); 650int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 651 const char *attrname, struct thread *td); 652int vfs_cache_lookup(struct vop_lookup_args *ap); 653void vfs_timestamp(struct timespec *); 654void vfs_write_resume(struct mount *mp); 655int vfs_write_suspend(struct mount *mp); 656int vop_stdbmap(struct vop_bmap_args *); 657int vop_stdfsync(struct vop_fsync_args *); 658int vop_stdgetwritemount(struct vop_getwritemount_args *); 659int vop_stdgetpages(struct vop_getpages_args *); 660int vop_stdinactive(struct vop_inactive_args *); 661int vop_stdislocked(struct vop_islocked_args *); 662int vop_stdlock(struct vop_lock_args *); 663int vop_stdputpages(struct vop_putpages_args *); 664int vop_stdunlock(struct vop_unlock_args *); 665int vop_nopoll(struct vop_poll_args *); 666int vop_stdpathconf(struct vop_pathconf_args *); 667int vop_stdpoll(struct vop_poll_args *); 668int vop_eopnotsupp(struct vop_generic_args *ap); 669int vop_ebadf(struct vop_generic_args *ap); 670int vop_einval(struct vop_generic_args *ap); 671int vop_enotty(struct vop_generic_args *ap); 672int vop_null(struct vop_generic_args *ap); 673int vop_panic(struct vop_generic_args *ap); 674 675void vput(struct vnode *vp); 676void vrele(struct vnode *vp); 677void vref(struct vnode *vp); 678int vrefcnt(struct vnode *vp); 679void v_addpollinfo(struct vnode *vp); 680 681int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td); 682void vnode_destroy_vobject(struct vnode *vp); 683 684extern struct vop_vector fifo_specops; 685extern struct vop_vector dead_vnodeops; 686extern struct vop_vector default_vnodeops; 687 688#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 689#define VOP_NULL ((void*)(uintptr_t)vop_null) 690#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 691#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 692#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 693#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 694 695/* vfs_hash.c */ 696typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg); 697 698int vfs_hash_get(struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 699int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 700void vfs_hash_rehash(struct vnode *vp, u_int hash); 701void vfs_hash_remove(struct vnode *vp); 702 703#endif /* _KERNEL */ 704 705#endif /* !_SYS_VNODE_H_ */ 706