vnode.h revision 147332
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 147332 2005-06-13 06:26:55Z 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_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/* We don't need to lock the knlist */ 226#define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \ 227 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note)) 228 229#define VN_KNOTE(vp, b, a) \ 230 do { \ 231 if (!VN_KNLIST_EMPTY(vp)) \ 232 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 233 } while (0) 234#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 235#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 236 237/* 238 * Vnode flags. 239 * VI flags are protected by interlock and live in v_iflag 240 * VV flags are protected by the vnode lock and live in v_vflag 241 */ 242#define VI_MOUNT 0x0020 /* Mount in progress */ 243#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 244#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 245#define VI_FREE 0x0100 /* This vnode is on the freelist */ 246#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 247#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 248#define VI_OWEINACT 0x1000 /* Need to call inactive */ 249 250#define VV_ROOT 0x0001 /* root of its filesystem */ 251#define VV_ISTTY 0x0002 /* vnode represents a tty */ 252#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 253#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 254#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 255#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 256#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 257#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 258 259/* 260 * Vnode attributes. A field value of VNOVAL represents a field whose value 261 * is unavailable (getattr) or which is not to be changed (setattr). 262 */ 263struct vattr { 264 enum vtype va_type; /* vnode type (for create) */ 265 u_short va_mode; /* files access mode and type */ 266 short va_nlink; /* number of references to file */ 267 uid_t va_uid; /* owner user id */ 268 gid_t va_gid; /* owner group id */ 269 dev_t va_fsid; /* filesystem id */ 270 long va_fileid; /* file id */ 271 u_quad_t va_size; /* file size in bytes */ 272 long va_blocksize; /* blocksize preferred for i/o */ 273 struct timespec va_atime; /* time of last access */ 274 struct timespec va_mtime; /* time of last modification */ 275 struct timespec va_ctime; /* time file changed */ 276 struct timespec va_birthtime; /* time file created */ 277 u_long va_gen; /* generation number of file */ 278 u_long va_flags; /* flags defined for file */ 279 dev_t va_rdev; /* device the special file represents */ 280 u_quad_t va_bytes; /* bytes of disk space held by file */ 281 u_quad_t va_filerev; /* file modification number */ 282 u_int va_vaflags; /* operations flags, see below */ 283 long va_spare; /* remain quad aligned */ 284}; 285 286/* 287 * Flags for va_vaflags. 288 */ 289#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 290#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 291#define VA_EXECVE_ATIME 0x04 /* setting atime for execve */ 292 293/* 294 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 295 * help with write clustering) 296 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 297 */ 298#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 299#define IO_APPEND 0x0002 /* append write to end */ 300#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 301#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 302#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 303#define IO_VMIO 0x0020 /* data already in VMIO space */ 304#define IO_INVAL 0x0040 /* invalidate after I/O */ 305#define IO_SYNC 0x0080 /* do I/O synchronously */ 306#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 307#define IO_EXT 0x0400 /* operate on external attributes */ 308#define IO_NORMAL 0x0800 /* operate on regular data */ 309#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 310 311#define IO_SEQMAX 0x7F /* seq heuristic max value */ 312#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 313 314/* 315 * Modes. Some values same as Ixxx entries from inode.h for now. 316 */ 317#define VEXEC 000100 /* execute/search permission */ 318#define VWRITE 000200 /* write permission */ 319#define VREAD 000400 /* read permission */ 320#define VSVTX 001000 /* save swapped text even after use */ 321#define VSGID 002000 /* set group id on execution */ 322#define VSUID 004000 /* set user id on execution */ 323#define VADMIN 010000 /* permission to administer */ 324#define VSTAT 020000 /* permission to retrieve attrs */ 325#define VAPPEND 040000 /* permission to write/append */ 326#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 327 328/* 329 * Token indicating no attribute value yet assigned. 330 */ 331#define VNOVAL (-1) 332 333/* 334 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 335 */ 336#define VLKTIMEOUT (hz / 20 + 1) 337 338#ifdef _KERNEL 339 340#ifdef MALLOC_DECLARE 341MALLOC_DECLARE(M_VNODE); 342#endif 343 344/* 345 * Convert between vnode types and inode formats (since POSIX.1 346 * defines mode word of stat structure in terms of inode formats). 347 */ 348extern enum vtype iftovt_tab[]; 349extern int vttoif_tab[]; 350#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 351#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 352#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 353 354/* 355 * Flags to various vnode functions. 356 */ 357#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 358#define FORCECLOSE 0x0002 /* vflush: force file closure */ 359#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 360#define DOCLOSE 0x0008 /* vclean: close active files */ 361#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 362#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 363#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 364#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 365#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 366#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 367#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 368 369#define VREF(vp) vref(vp) 370 371#ifdef DIAGNOSTIC 372#define VATTR_NULL(vap) vattr_null(vap) 373#else 374#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 375#endif /* DIAGNOSTIC */ 376 377#define NULLVP ((struct vnode *)NULL) 378 379/* 380 * Global vnode data. 381 */ 382extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 383extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 384extern int desiredvnodes; /* number of vnodes desired */ 385extern struct uma_zone *namei_zone; 386extern int prtactive; /* nonzero to call vprint() */ 387extern struct vattr va_null; /* predefined null vattr structure */ 388 389/* 390 * Macro/function to check for client cache inconsistency w.r.t. leasing. 391 */ 392#define LEASE_READ 0x1 /* Check lease for readers */ 393#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 394 395extern void (*lease_updatetime)(int deltat); 396 397#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 398#define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags)) 399#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 400#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 401#define VI_MTX(vp) (&(vp)->v_interlock) 402 403#endif /* _KERNEL */ 404 405/* 406 * Mods for extensibility. 407 */ 408 409/* 410 * Flags for vdesc_flags: 411 */ 412#define VDESC_MAX_VPS 16 413/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 414#define VDESC_VP0_WILLRELE 0x0001 415#define VDESC_VP1_WILLRELE 0x0002 416#define VDESC_VP2_WILLRELE 0x0004 417#define VDESC_VP3_WILLRELE 0x0008 418#define VDESC_NOMAP_VPP 0x0100 419#define VDESC_VPP_WILLRELE 0x0200 420 421/* 422 * A generic structure. 423 * This can be used by bypass routines to identify generic arguments. 424 */ 425struct vop_generic_args { 426 struct vnodeop_desc *a_desc; 427 /* other random data follows, presumably */ 428}; 429 430typedef int vop_bypass_t(struct vop_generic_args *); 431 432/* 433 * VDESC_NO_OFFSET is used to identify the end of the offset list 434 * and in places where no such field exists. 435 */ 436#define VDESC_NO_OFFSET -1 437 438/* 439 * This structure describes the vnode operation taking place. 440 */ 441struct vnodeop_desc { 442 char *vdesc_name; /* a readable name for debugging */ 443 int vdesc_flags; /* VDESC_* flags */ 444 vop_bypass_t *vdesc_call; /* Function to call */ 445 446 /* 447 * These ops are used by bypass routines to map and locate arguments. 448 * Creds and procs are not needed in bypass routines, but sometimes 449 * they are useful to (for example) transport layers. 450 * Nameidata is useful because it has a cred in it. 451 */ 452 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 453 int vdesc_vpp_offset; /* return vpp location */ 454 int vdesc_cred_offset; /* cred location, if any */ 455 int vdesc_thread_offset; /* thread location, if any */ 456 int vdesc_componentname_offset; /* if any */ 457 /* 458 * Finally, we've got a list of private data (about each operation) 459 * for each transport layer. (Support to manage this list is not 460 * yet part of BSD.) 461 */ 462 caddr_t *vdesc_transports; 463}; 464 465#ifdef _KERNEL 466/* 467 * A list of all the operation descs. 468 */ 469extern struct vnodeop_desc *vnodeop_descs[]; 470 471#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 472#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 473 ((s_type)(((char*)(struct_p)) + (s_offset))) 474 475 476#ifdef DEBUG_VFS_LOCKS 477/* 478 * Support code to aid in debugging VFS locking problems. Not totally 479 * reliable since if the thread sleeps between changing the lock 480 * state and checking it with the assert, some other thread could 481 * change the state. They are good enough for debugging a single 482 * filesystem using a single-threaded test. 483 */ 484void assert_vi_locked(struct vnode *vp, const char *str); 485void assert_vi_unlocked(struct vnode *vp, const char *str); 486void assert_vop_elocked(struct vnode *vp, const char *str); 487#if 0 488void assert_vop_elocked_other(struct vnode *vp, const char *str); 489#endif 490void assert_vop_locked(struct vnode *vp, const char *str); 491#if 0 492voi0 assert_vop_slocked(struct vnode *vp, const char *str); 493#endif 494void assert_vop_unlocked(struct vnode *vp, const char *str); 495 496#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 497#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 498#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 499#if 0 500#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 501#endif 502#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 503#if 0 504#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 505#endif 506#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 507 508#else /* !DEBUG_VFS_LOCKS */ 509 510#define ASSERT_VI_LOCKED(vp, str) 511#define ASSERT_VI_UNLOCKED(vp, str) 512#define ASSERT_VOP_ELOCKED(vp, str) 513#if 0 514#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 515#endif 516#define ASSERT_VOP_LOCKED(vp, str) 517#if 0 518#define ASSERT_VOP_SLOCKED(vp, str) 519#endif 520#define ASSERT_VOP_UNLOCKED(vp, str) 521#endif /* DEBUG_VFS_LOCKS */ 522 523 524/* 525 * This call works for vnodes in the kernel. 526 */ 527#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 528 529/* 530 * VMIO support inline 531 */ 532 533extern int vmiodirenable; 534 535static __inline int 536vn_canvmio(struct vnode *vp) 537{ 538 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 539 return(TRUE); 540 return(FALSE); 541} 542 543/* 544 * Finally, include the default set of vnode operations. 545 */ 546#include "vnode_if.h" 547 548/* 549 * Public vnode manipulation functions. 550 */ 551struct componentname; 552struct file; 553struct mount; 554struct nameidata; 555struct ostat; 556struct thread; 557struct proc; 558struct stat; 559struct nstat; 560struct ucred; 561struct uio; 562struct vattr; 563struct vnode; 564 565extern int (*lease_check_hook)(struct vop_lease_args *); 566extern int (*softdep_process_worklist_hook)(struct mount *); 567 568/* cache_* may belong in namei.h. */ 569void cache_enter(struct vnode *dvp, struct vnode *vp, 570 struct componentname *cnp); 571int cache_lookup(struct vnode *dvp, struct vnode **vpp, 572 struct componentname *cnp); 573void cache_purge(struct vnode *vp); 574void cache_purgevfs(struct mount *mp); 575int cache_leaf_test(struct vnode *vp); 576int change_dir(struct vnode *vp, struct thread *td); 577int change_root(struct vnode *vp, struct thread *td); 578void cvtstat(struct stat *st, struct ostat *ost); 579void cvtnstat(struct stat *sb, struct nstat *nsb); 580int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 581 struct vnode **vpp); 582u_quad_t init_va_filerev(void); 583int lease_check(struct vop_lease_args *ap); 584int speedup_syncer(void); 585#define textvp_fullpath(p, rb, rfb) \ 586 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 587int vn_fullpath(struct thread *td, struct vnode *vn, 588 char **retbuf, char **freebuf); 589int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 590 mode_t acc_mode, struct ucred *cred, int *privused); 591int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 592 gid_t file_gid, struct acl *acl, mode_t acc_mode, 593 struct ucred *cred, int *privused); 594void vattr_null(struct vattr *vap); 595int vcount(struct vnode *vp); 596void vdrop(struct vnode *); 597void vfs_add_vnodeops(const void *); 598void vfs_rm_vnodeops(const void *); 599int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 600int vget(struct vnode *vp, int lockflag, struct thread *td); 601void vgone(struct vnode *vp); 602void vhold(struct vnode *); 603void vholdl(struct vnode *); 604int vinvalbuf(struct vnode *vp, int save, 605 struct thread *td, int slpflag, int slptimeo); 606int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 607 off_t length, int blksize); 608void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); 609#define vprint(label, vp) vn_printf((vp), "%s\n", (label)) 610int vrecycle(struct vnode *vp, struct thread *td); 611int vn_close(struct vnode *vp, 612 int flags, struct ucred *file_cred, struct thread *td); 613void vn_finished_write(struct mount *mp); 614int vn_isdisk(struct vnode *vp, int *errp); 615int vn_lock(struct vnode *vp, int flags, struct thread *td); 616#ifdef DEBUG_LOCKS 617int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 618 const char *filename, int line); 619#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 620#endif 621int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 622int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 623 struct ucred *cred, int fdidx); 624int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 625int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 626 int len, off_t offset, enum uio_seg segflg, int ioflg, 627 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 628 struct thread *td); 629int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 630 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 631 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 632 struct thread *td); 633int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 634 struct ucred *file_cred, struct thread *td); 635int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 636int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 637 int flags); 638int vn_writechk(struct vnode *vp); 639int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 640 const char *attrname, int *buflen, char *buf, struct thread *td); 641int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 642 const char *attrname, int buflen, char *buf, struct thread *td); 643int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 644 const char *attrname, struct thread *td); 645int vfs_cache_lookup(struct vop_lookup_args *ap); 646void vfs_timestamp(struct timespec *); 647void vfs_write_resume(struct mount *mp); 648int vfs_write_suspend(struct mount *mp); 649int vop_stdbmap(struct vop_bmap_args *); 650int vop_stdfsync(struct vop_fsync_args *); 651int vop_stdgetwritemount(struct vop_getwritemount_args *); 652int vop_stdgetpages(struct vop_getpages_args *); 653int vop_stdinactive(struct vop_inactive_args *); 654int vop_stdislocked(struct vop_islocked_args *); 655int vop_stdkqfilter(struct vop_kqfilter_args *); 656int vop_stdlock(struct vop_lock_args *); 657int vop_stdputpages(struct vop_putpages_args *); 658int vop_stdunlock(struct vop_unlock_args *); 659int vop_nopoll(struct vop_poll_args *); 660int vop_stdpathconf(struct vop_pathconf_args *); 661int vop_stdpoll(struct vop_poll_args *); 662int vop_eopnotsupp(struct vop_generic_args *ap); 663int vop_ebadf(struct vop_generic_args *ap); 664int vop_einval(struct vop_generic_args *ap); 665int vop_enotty(struct vop_generic_args *ap); 666int vop_null(struct vop_generic_args *ap); 667int vop_panic(struct vop_generic_args *ap); 668 669/* These are called from within the actual VOPS. */ 670void vop_create_post(void *a, int rc); 671void vop_link_post(void *a, int rc); 672void vop_lock_pre(void *a); 673void vop_lock_post(void *a, int rc); 674void vop_lookup_post(void *a, int rc); 675void vop_lookup_pre(void *a); 676void vop_mkdir_post(void *a, int rc); 677void vop_mknod_post(void *a, int rc); 678void vop_remove_post(void *a, int rc); 679void vop_rename_post(void *a, int rc); 680void vop_rename_pre(void *a); 681void vop_rmdir_post(void *a, int rc); 682void vop_setattr_post(void *a, int rc); 683void vop_strategy_pre(void *a); 684void vop_symlink_post(void *a, int rc); 685void vop_unlock_post(void *a, int rc); 686void vop_unlock_pre(void *a); 687 688#define VOP_WRITE_PRE(ap) \ 689 struct vattr va; \ 690 int error, osize, ooffset, noffset; \ 691 \ 692 osize = ooffset = noffset = 0; \ 693 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \ 694 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred, \ 695 curthread); \ 696 if (error) \ 697 return (error); \ 698 ooffset = (ap)->a_uio->uio_offset; \ 699 osize = va.va_size; \ 700 } 701 702#define VOP_WRITE_POST(ap, ret) \ 703 noffset = (ap)->a_uio->uio_offset; \ 704 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \ 705 VFS_SEND_KNOTE((ap)->a_vp, NOTE_WRITE \ 706 | (noffset > osize ? NOTE_EXTEND : 0)); \ 707 } 708 709void vput(struct vnode *vp); 710void vrele(struct vnode *vp); 711void vref(struct vnode *vp); 712int vrefcnt(struct vnode *vp); 713void v_addpollinfo(struct vnode *vp); 714 715int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td); 716void vnode_destroy_vobject(struct vnode *vp); 717 718extern struct vop_vector fifo_specops; 719extern struct vop_vector dead_vnodeops; 720extern struct vop_vector default_vnodeops; 721 722#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 723#define VOP_NULL ((void*)(uintptr_t)vop_null) 724#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 725#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 726#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 727#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 728 729/* vfs_hash.c */ 730typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg); 731 732int vfs_hash_get(struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 733int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 734void vfs_hash_rehash(struct vnode *vp, u_int hash); 735void vfs_hash_remove(struct vnode *vp); 736 737int vfs_kqfilter(struct vop_kqfilter_args *); 738 739#endif /* _KERNEL */ 740 741#endif /* !_SYS_VNODE_H_ */ 742