vnode.h revision 177537
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 177537 2008-03-24 04:11:40Z jeff $ 31 */ 32 33#ifndef _SYS_VNODE_H_ 34#define _SYS_VNODE_H_ 35 36#include <sys/bufobj.h> 37#include <sys/queue.h> 38#include <sys/lock.h> 39#include <sys/lockmgr.h> 40#include <sys/mutex.h> 41#include <sys/selinfo.h> 42#include <sys/uio.h> 43#include <sys/acl.h> 44#include <sys/ktr.h> 45 46/* 47 * The vnode is the focus of all file activity in UNIX. There is a 48 * unique vnode allocated for each active file, each current directory, 49 * each mounted-on file, text file, and the root. 50 */ 51 52/* 53 * Vnode types. VNON means no type. 54 */ 55enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD, 56 VMARKER }; 57 58/* 59 * Each underlying filesystem allocates its own private area and hangs 60 * it from v_data. If non-null, this area is freed in getnewvnode(). 61 */ 62 63struct namecache; 64 65struct vpollinfo { 66 struct mtx vpi_lock; /* lock to protect below */ 67 struct selinfo vpi_selinfo; /* identity of poller(s) */ 68 short vpi_events; /* what they are looking for */ 69 short vpi_revents; /* what has happened */ 70}; 71 72/* 73 * Reading or writing any of these items requires holding the appropriate lock. 74 * 75 * Lock reference: 76 * c - namecache mutex 77 * f - freelist mutex 78 * G - Giant 79 * i - interlock 80 * m - mntvnodes mutex 81 * p - pollinfo lock 82 * s - spechash mutex 83 * S - syncer mutex 84 * u - Only a reference to the vnode is needed to read. 85 * v - vnode lock 86 * 87 * Vnodes may be found on many lists. The general way to deal with operating 88 * on a vnode that is on a list is: 89 * 1) Lock the list and find the vnode. 90 * 2) Lock interlock so that the vnode does not go away. 91 * 3) Unlock the list to avoid lock order reversals. 92 * 4) vget with LK_INTERLOCK and check for ENOENT, or 93 * 5) Check for DOOMED if the vnode lock is not required. 94 * 6) Perform your operation, then vput(). 95 */ 96 97#if defined(_KERNEL) || defined(_KVM_VNODE) 98 99struct vnode { 100 /* 101 * Fields which define the identity of the vnode. These fields are 102 * owned by the filesystem (XXX: and vgone() ?) 103 */ 104 enum vtype v_type; /* u vnode type */ 105 const char *v_tag; /* u type of underlying data */ 106 struct vop_vector *v_op; /* u vnode operations vector */ 107 void *v_data; /* u private data for fs */ 108 109 /* 110 * Filesystem instance stuff 111 */ 112 struct mount *v_mount; /* u ptr to vfs we are in */ 113 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 114 115 /* 116 * Type specific fields, only one applies to any given vnode. 117 * See #defines below for renaming to v_* namespace. 118 */ 119 union { 120 struct mount *vu_mount; /* v ptr to mountpoint (VDIR) */ 121 struct socket *vu_socket; /* v unix domain net (VSOCK) */ 122 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 123 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 124 int vu_yield; /* yield count (VMARKER) */ 125 } v_un; 126 127 /* 128 * vfs_hash: (mount + inode) -> vnode hash. 129 */ 130 LIST_ENTRY(vnode) v_hashlist; 131 u_int v_hash; 132 133 /* 134 * VFS_namecache stuff 135 */ 136 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 137 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 138 struct vnode *v_dd; /* c .. vnode */ 139 140 /* 141 * clustering stuff 142 */ 143 daddr_t v_cstart; /* v start block of cluster */ 144 daddr_t v_lasta; /* v last allocation */ 145 daddr_t v_lastw; /* v last write */ 146 int v_clen; /* v length of cur. cluster */ 147 148 /* 149 * Locking 150 */ 151 struct lock v_lock; /* u (if fs don't have one) */ 152 struct mtx v_interlock; /* lock for "i" things */ 153 struct lock *v_vnlock; /* u pointer to vnode lock */ 154 int v_holdcnt; /* i prevents recycling. */ 155 int v_usecount; /* i ref count of users */ 156 u_long v_iflag; /* i vnode flags (see below) */ 157 u_long v_vflag; /* v vnode flags */ 158 int v_writecount; /* v ref count of writers */ 159 160 /* 161 * The machinery of being a vnode 162 */ 163 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 164 struct bufobj v_bufobj; /* * Buffer cache object */ 165 166 /* 167 * Hooks for various subsystems and features. 168 */ 169 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 170 struct label *v_label; /* MAC label for vnode */ 171}; 172 173#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 174 175#define v_mountedhere v_un.vu_mount 176#define v_socket v_un.vu_socket 177#define v_rdev v_un.vu_cdev 178#define v_fifoinfo v_un.vu_fifoinfo 179#define v_yield v_un.vu_yield 180 181/* XXX: These are temporary to avoid a source sweep at this time */ 182#define v_object v_bufobj.bo_object 183 184/* 185 * Userland version of struct vnode, for sysctl. 186 */ 187struct xvnode { 188 size_t xv_size; /* sizeof(struct xvnode) */ 189 void *xv_vnode; /* address of real vnode */ 190 u_long xv_flag; /* vnode vflags */ 191 int xv_usecount; /* reference count of users */ 192 int xv_writecount; /* reference count of writers */ 193 int xv_holdcnt; /* page & buffer references */ 194 u_long xv_id; /* capability identifier */ 195 void *xv_mount; /* address of parent mount */ 196 long xv_numoutput; /* num of writes in progress */ 197 enum vtype xv_type; /* vnode type */ 198 union { 199 void *xvu_socket; /* socket, if VSOCK */ 200 void *xvu_fifo; /* fifo, if VFIFO */ 201 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 202 struct { 203 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 204 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 205 } xv_uns; 206 } xv_un; 207}; 208#define xv_socket xv_un.xvu_socket 209#define xv_fifo xv_un.xvu_fifo 210#define xv_rdev xv_un.xvu_rdev 211#define xv_dev xv_un.xv_uns.xvu_dev 212#define xv_ino xv_un.xv_uns.xvu_ino 213 214/* We don't need to lock the knlist */ 215#define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \ 216 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note)) 217 218#define VN_KNOTE(vp, b, a) \ 219 do { \ 220 if (!VN_KNLIST_EMPTY(vp)) \ 221 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 222 } while (0) 223#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 224#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 225 226/* 227 * Vnode flags. 228 * VI flags are protected by interlock and live in v_iflag 229 * VV flags are protected by the vnode lock and live in v_vflag 230 * 231 * VI_DOOMED is doubly protected by the interlock and vnode lock. Both 232 * are required for writing but the status may be checked with either. 233 */ 234#define VI_MOUNT 0x0020 /* Mount in progress */ 235#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 236#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 237#define VI_FREE 0x0100 /* This vnode is on the freelist */ 238#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 239#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 240#define VI_OWEINACT 0x1000 /* Need to call inactive */ 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#define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */ 251#define VV_DELETED 0x0400 /* should be removed */ 252#define VV_MD 0x0800 /* vnode backs the md device */ 253 254/* 255 * Vnode attributes. A field value of VNOVAL represents a field whose value 256 * is unavailable (getattr) or which is not to be changed (setattr). 257 */ 258struct vattr { 259 enum vtype va_type; /* vnode type (for create) */ 260 u_short va_mode; /* files access mode and type */ 261 short va_nlink; /* number of references to file */ 262 uid_t va_uid; /* owner user id */ 263 gid_t va_gid; /* owner group id */ 264 dev_t va_fsid; /* filesystem id */ 265 long va_fileid; /* file id */ 266 u_quad_t va_size; /* file size in bytes */ 267 long va_blocksize; /* blocksize preferred for i/o */ 268 struct timespec va_atime; /* time of last access */ 269 struct timespec va_mtime; /* time of last modification */ 270 struct timespec va_ctime; /* time file changed */ 271 struct timespec va_birthtime; /* time file created */ 272 u_long va_gen; /* generation number of file */ 273 u_long va_flags; /* flags defined for file */ 274 dev_t va_rdev; /* device the special file represents */ 275 u_quad_t va_bytes; /* bytes of disk space held by file */ 276 u_quad_t va_filerev; /* file modification number */ 277 u_int va_vaflags; /* operations flags, see below */ 278 long va_spare; /* remain quad aligned */ 279}; 280 281/* 282 * Flags for va_vaflags. 283 */ 284#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 285#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 286#define VA_MARK_ATIME 0x04 /* setting atime for execve/mmap */ 287 288/* 289 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 290 * help with write clustering) 291 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 292 */ 293#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 294#define IO_APPEND 0x0002 /* append write to end */ 295#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 296#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 297#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 298#define IO_VMIO 0x0020 /* data already in VMIO space */ 299#define IO_INVAL 0x0040 /* invalidate after I/O */ 300#define IO_SYNC 0x0080 /* do I/O synchronously */ 301#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 302#define IO_EXT 0x0400 /* operate on external attributes */ 303#define IO_NORMAL 0x0800 /* operate on regular data */ 304#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 305 306#define IO_SEQMAX 0x7F /* seq heuristic max value */ 307#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 308 309/* 310 * Modes. Some values same as Ixxx entries from inode.h for now. 311 */ 312#define VEXEC 000100 /* execute/search permission */ 313#define VWRITE 000200 /* write permission */ 314#define VREAD 000400 /* read permission */ 315#define VSVTX 001000 /* save swapped text even after use */ 316#define VSGID 002000 /* set group id on execution */ 317#define VSUID 004000 /* set user id on execution */ 318#define VADMIN 010000 /* permission to administer */ 319#define VSTAT 020000 /* permission to retrieve attrs */ 320#define VAPPEND 040000 /* permission to write/append */ 321#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 322 323/* 324 * Token indicating no attribute value yet assigned. 325 */ 326#define VNOVAL (-1) 327 328/* 329 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 330 */ 331#define VLKTIMEOUT (hz / 20 + 1) 332 333#ifdef _KERNEL 334 335#ifdef MALLOC_DECLARE 336MALLOC_DECLARE(M_VNODE); 337#endif 338 339/* 340 * Convert between vnode types and inode formats (since POSIX.1 341 * defines mode word of stat structure in terms of inode formats). 342 */ 343extern enum vtype iftovt_tab[]; 344extern int vttoif_tab[]; 345#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 346#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 347#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 348 349/* 350 * Flags to various vnode functions. 351 */ 352#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 353#define FORCECLOSE 0x0002 /* vflush: force file closure */ 354#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 355#define DOCLOSE 0x0008 /* vclean: close active files */ 356#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 357#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 358#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 359#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 360#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 361#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 362#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 363 364#define VREF(vp) vref(vp) 365 366#ifdef DIAGNOSTIC 367#define VATTR_NULL(vap) vattr_null(vap) 368#else 369#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 370#endif /* DIAGNOSTIC */ 371 372#define NULLVP ((struct vnode *)NULL) 373 374/* 375 * Global vnode data. 376 */ 377extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 378extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 379extern int desiredvnodes; /* number of vnodes desired */ 380extern struct uma_zone *namei_zone; 381extern int prtactive; /* nonzero to call vprint() */ 382extern struct vattr va_null; /* predefined null vattr structure */ 383 384/* 385 * Macro/function to check for client cache inconsistency w.r.t. leasing. 386 */ 387#define LEASE_READ 0x1 /* Check lease for readers */ 388#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 389 390extern void (*lease_updatetime)(int deltat); 391 392#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 393#define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags)) 394#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 395#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 396#define VI_MTX(vp) (&(vp)->v_interlock) 397 398#define VN_LOCK_AREC(vp) ((vp)->v_vnlock->lk_flags |= LK_CANRECURSE) 399#define VN_LOCK_ASHARE(vp) ((vp)->v_vnlock->lk_flags &= ~LK_NOSHARE) 400 401#endif /* _KERNEL */ 402 403/* 404 * Mods for extensibility. 405 */ 406 407/* 408 * Flags for vdesc_flags: 409 */ 410#define VDESC_MAX_VPS 16 411/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 412#define VDESC_VP0_WILLRELE 0x0001 413#define VDESC_VP1_WILLRELE 0x0002 414#define VDESC_VP2_WILLRELE 0x0004 415#define VDESC_VP3_WILLRELE 0x0008 416#define VDESC_NOMAP_VPP 0x0100 417#define VDESC_VPP_WILLRELE 0x0200 418 419/* 420 * A generic structure. 421 * This can be used by bypass routines to identify generic arguments. 422 */ 423struct vop_generic_args { 424 struct vnodeop_desc *a_desc; 425 /* other random data follows, presumably */ 426}; 427 428typedef int vop_bypass_t(struct vop_generic_args *); 429 430/* 431 * VDESC_NO_OFFSET is used to identify the end of the offset list 432 * and in places where no such field exists. 433 */ 434#define VDESC_NO_OFFSET -1 435 436/* 437 * This structure describes the vnode operation taking place. 438 */ 439struct vnodeop_desc { 440 char *vdesc_name; /* a readable name for debugging */ 441 int vdesc_flags; /* VDESC_* flags */ 442 vop_bypass_t *vdesc_call; /* Function to call */ 443 444 /* 445 * These ops are used by bypass routines to map and locate arguments. 446 * Creds and procs are not needed in bypass routines, but sometimes 447 * they are useful to (for example) transport layers. 448 * Nameidata is useful because it has a cred in it. 449 */ 450 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 451 int vdesc_vpp_offset; /* return vpp location */ 452 int vdesc_cred_offset; /* cred location, if any */ 453 int vdesc_thread_offset; /* thread location, if any */ 454 int vdesc_componentname_offset; /* if any */ 455}; 456 457#ifdef _KERNEL 458/* 459 * A list of all the operation descs. 460 */ 461extern struct vnodeop_desc *vnodeop_descs[]; 462 463#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 464#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 465 ((s_type)(((char*)(struct_p)) + (s_offset))) 466 467 468#ifdef DEBUG_VFS_LOCKS 469/* 470 * Support code to aid in debugging VFS locking problems. Not totally 471 * reliable since if the thread sleeps between changing the lock 472 * state and checking it with the assert, some other thread could 473 * change the state. They are good enough for debugging a single 474 * filesystem using a single-threaded test. 475 */ 476void assert_vi_locked(struct vnode *vp, const char *str); 477void assert_vi_unlocked(struct vnode *vp, const char *str); 478void assert_vop_elocked(struct vnode *vp, const char *str); 479#if 0 480void assert_vop_elocked_other(struct vnode *vp, const char *str); 481#endif 482void assert_vop_locked(struct vnode *vp, const char *str); 483#if 0 484voi0 assert_vop_slocked(struct vnode *vp, const char *str); 485#endif 486void assert_vop_unlocked(struct vnode *vp, const char *str); 487 488#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 489#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 490#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 491#if 0 492#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 493#endif 494#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 495#if 0 496#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 497#endif 498#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 499 500#else /* !DEBUG_VFS_LOCKS */ 501 502#define ASSERT_VI_LOCKED(vp, str) 503#define ASSERT_VI_UNLOCKED(vp, str) 504#define ASSERT_VOP_ELOCKED(vp, str) 505#if 0 506#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 507#endif 508#define ASSERT_VOP_LOCKED(vp, str) 509#if 0 510#define ASSERT_VOP_SLOCKED(vp, str) 511#endif 512#define ASSERT_VOP_UNLOCKED(vp, str) 513#endif /* DEBUG_VFS_LOCKS */ 514 515 516/* 517 * This call works for vnodes in the kernel. 518 */ 519#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 520 521/* 522 * VMIO support inline 523 */ 524 525extern int vmiodirenable; 526 527static __inline int 528vn_canvmio(struct vnode *vp) 529{ 530 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 531 return(TRUE); 532 return(FALSE); 533} 534 535/* 536 * Finally, include the default set of vnode operations. 537 */ 538#include "vnode_if.h" 539 540/* 541 * Public vnode manipulation functions. 542 */ 543struct componentname; 544struct file; 545struct mount; 546struct nameidata; 547struct ostat; 548struct thread; 549struct proc; 550struct stat; 551struct nstat; 552struct ucred; 553struct uio; 554struct vattr; 555struct vnode; 556 557extern int (*lease_check_hook)(struct vop_lease_args *); 558 559/* cache_* may belong in namei.h. */ 560void cache_enter(struct vnode *dvp, struct vnode *vp, 561 struct componentname *cnp); 562int cache_lookup(struct vnode *dvp, struct vnode **vpp, 563 struct componentname *cnp); 564void cache_purge(struct vnode *vp); 565void cache_purgevfs(struct mount *mp); 566int change_dir(struct vnode *vp, struct thread *td); 567int change_root(struct vnode *vp, struct thread *td); 568void cvtstat(struct stat *st, struct ostat *ost); 569void cvtnstat(struct stat *sb, struct nstat *nsb); 570int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 571 struct vnode **vpp); 572int insmntque1(struct vnode *vp, struct mount *mp, 573 void (*dtr)(struct vnode *, void *), void *dtr_arg); 574int insmntque(struct vnode *vp, struct mount *mp); 575u_quad_t init_va_filerev(void); 576int lease_check(struct vop_lease_args *ap); 577int speedup_syncer(void); 578#define textvp_fullpath(p, rb, rfb) \ 579 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 580int vn_fullpath(struct thread *td, struct vnode *vn, 581 char **retbuf, char **freebuf); 582int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid, 583 gid_t file_gid, mode_t acc_mode, struct ucred *cred, 584 int *privused); 585int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 586 gid_t file_gid, struct acl *acl, mode_t acc_mode, 587 struct ucred *cred, int *privused); 588void vattr_null(struct vattr *vap); 589int vcount(struct vnode *vp); 590void vdrop(struct vnode *); 591void vdropl(struct vnode *); 592int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 593int vget(struct vnode *vp, int lockflag, struct thread *td); 594void vgone(struct vnode *vp); 595void vhold(struct vnode *); 596void vholdl(struct vnode *); 597int vinvalbuf(struct vnode *vp, int save, 598 struct thread *td, int slpflag, int slptimeo); 599int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 600 off_t length, int blksize); 601void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); 602#define vprint(label, vp) vn_printf((vp), "%s\n", (label)) 603int vrecycle(struct vnode *vp, struct thread *td); 604int vn_close(struct vnode *vp, 605 int flags, struct ucred *file_cred, struct thread *td); 606void vn_finished_write(struct mount *mp); 607void vn_finished_secondary_write(struct mount *mp); 608int vn_isdisk(struct vnode *vp, int *errp); 609int _vn_lock(struct vnode *vp, int flags, char *file, int line); 610#define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__) 611int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp); 612int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 613 struct ucred *cred, struct file *fp); 614int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 615int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base, 616 int len, off_t offset, enum uio_seg segflg, int ioflg, 617 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 618 struct thread *td); 619int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base, 620 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 621 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 622 struct thread *td); 623int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 624 struct ucred *file_cred, struct thread *td); 625int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 626int vn_start_secondary_write(struct vnode *vp, struct mount **mpp, 627 int flags); 628int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 629 int flags); 630int vn_writechk(struct vnode *vp); 631int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 632 const char *attrname, int *buflen, char *buf, struct thread *td); 633int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 634 const char *attrname, int buflen, char *buf, struct thread *td); 635int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 636 const char *attrname, struct thread *td); 637int vfs_cache_lookup(struct vop_lookup_args *ap); 638void vfs_timestamp(struct timespec *); 639void vfs_write_resume(struct mount *mp); 640int vfs_write_suspend(struct mount *mp); 641int vop_stdbmap(struct vop_bmap_args *); 642int vop_stdfsync(struct vop_fsync_args *); 643int vop_stdgetwritemount(struct vop_getwritemount_args *); 644int vop_stdgetpages(struct vop_getpages_args *); 645int vop_stdinactive(struct vop_inactive_args *); 646int vop_stdislocked(struct vop_islocked_args *); 647int vop_stdkqfilter(struct vop_kqfilter_args *); 648int vop_stdlock(struct vop_lock1_args *); 649int vop_stdputpages(struct vop_putpages_args *); 650int vop_stdunlock(struct vop_unlock_args *); 651int vop_nopoll(struct vop_poll_args *); 652int vop_stdpathconf(struct vop_pathconf_args *); 653int vop_stdpoll(struct vop_poll_args *); 654int vop_stdvptofh(struct vop_vptofh_args *ap); 655int vop_eopnotsupp(struct vop_generic_args *ap); 656int vop_ebadf(struct vop_generic_args *ap); 657int vop_einval(struct vop_generic_args *ap); 658int vop_enotty(struct vop_generic_args *ap); 659int vop_null(struct vop_generic_args *ap); 660int vop_panic(struct vop_generic_args *ap); 661 662/* These are called from within the actual VOPS. */ 663void vop_create_post(void *a, int rc); 664void vop_link_post(void *a, int rc); 665void vop_lock_pre(void *a); 666void vop_lock_post(void *a, int rc); 667void vop_lookup_post(void *a, int rc); 668void vop_lookup_pre(void *a); 669void vop_mkdir_post(void *a, int rc); 670void vop_mknod_post(void *a, int rc); 671void vop_remove_post(void *a, int rc); 672void vop_rename_post(void *a, int rc); 673void vop_rename_pre(void *a); 674void vop_rmdir_post(void *a, int rc); 675void vop_setattr_post(void *a, int rc); 676void vop_strategy_pre(void *a); 677void vop_symlink_post(void *a, int rc); 678void vop_unlock_post(void *a, int rc); 679void vop_unlock_pre(void *a); 680 681#define VOP_WRITE_PRE(ap) \ 682 struct vattr va; \ 683 int error, osize, ooffset, noffset; \ 684 \ 685 osize = ooffset = noffset = 0; \ 686 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \ 687 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred, \ 688 curthread); \ 689 if (error) \ 690 return (error); \ 691 ooffset = (ap)->a_uio->uio_offset; \ 692 osize = va.va_size; \ 693 } 694 695#define VOP_WRITE_POST(ap, ret) \ 696 noffset = (ap)->a_uio->uio_offset; \ 697 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \ 698 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \ 699 | (noffset > osize ? NOTE_EXTEND : 0)); \ 700 } 701 702#define VOP_LOCK(vp, flags) VOP_LOCK1(vp, flags, __FILE__, __LINE__) 703 704 705void vput(struct vnode *vp); 706void vrele(struct vnode *vp); 707void vref(struct vnode *vp); 708int vrefcnt(struct vnode *vp); 709void v_addpollinfo(struct vnode *vp); 710 711int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td); 712void vnode_destroy_vobject(struct vnode *vp); 713 714extern struct vop_vector fifo_specops; 715extern struct vop_vector dead_vnodeops; 716extern struct vop_vector default_vnodeops; 717 718#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 719#define VOP_NULL ((void*)(uintptr_t)vop_null) 720#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 721#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 722#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 723#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 724 725/* vfs_hash.c */ 726typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg); 727 728int vfs_hash_get(const struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 729int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 730void vfs_hash_rehash(struct vnode *vp, u_int hash); 731void vfs_hash_remove(struct vnode *vp); 732 733int vfs_kqfilter(struct vop_kqfilter_args *); 734void vfs_mark_atime(struct vnode *vp, struct thread *td); 735struct dirent; 736int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off); 737 738#endif /* _KERNEL */ 739 740#endif /* !_SYS_VNODE_H_ */ 741