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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)vnode.h 8.7 (Berkeley) 2/4/94 34 * $FreeBSD: src/sys/sys/vnode.h,v 1.111.2.19 2002/12/29 18:19:53 dillon Exp $ 35 */ 36 37 #ifndef _SYS_VNODE_H_ 38 #define _SYS_VNODE_H_ 39 40 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 41 42 #ifndef _SYS_QUEUE_H_ 43 #include <sys/queue.h> 44 #endif 45 #ifndef _SYS_LOCK_H_ 46 #include <sys/lock.h> 47 #endif 48 #ifndef _SYS_EVENT_H_ 49 #include <sys/event.h> 50 #endif 51 #ifndef _SYS_BIOTRACK_H_ 52 #include <sys/biotrack.h> 53 #endif 54 #ifndef _SYS_UIO_H_ 55 #include <sys/uio.h> 56 #endif 57 #ifndef _SYS_ACL_H_ 58 #include <sys/acl.h> 59 #endif 60 #ifndef _SYS_NAMECACHE_H_ 61 #include <sys/namecache.h> 62 #endif 63 #ifndef _SYS_THREAD_H_ 64 #include <sys/thread.h> 65 #endif 66 #ifndef _SYS_VFSOPS_H_ 67 #include <sys/vfsops.h> 68 #endif 69 #ifndef _SYS_VFSCACHE_H_ 70 #include <sys/vfscache.h> 71 #endif 72 #ifndef _SYS_TREE_H_ 73 #include <sys/tree.h> 74 #endif 75 #ifndef _SYS_SYSLINK_RPC_H_ 76 #include <sys/syslink_rpc.h> 77 #endif 78 #ifndef _SYS_SYSREF_H_ 79 #include <sys/sysref.h> 80 #endif 81 #ifndef _MACHINE_LOCK_H_ 82 #include <machine/lock.h> 83 #endif 84 85 /* 86 * The vnode is the focus of all file activity in UNIX. There is a 87 * unique vnode allocated for each active file, each current directory, 88 * each mounted-on file, text file, and the root. 89 */ 90 91 /* 92 * Each underlying filesystem allocates its own private area and hangs 93 * it from v_data. If non-null, this area is freed in getnewvnode(). 94 */ 95 TAILQ_HEAD(buflists, buf); 96 97 /* 98 * Struct for mount options to printable formats. 99 */ 100 struct mountctl_opt { 101 int o_opt; 102 const char *o_name; 103 }; 104 105 /* 106 * The vnode infrastructure is being reorgranized. Most reference-related 107 * fields are locked by the BGL, and most file I/O related operations and 108 * vnode teardown functions are locked by the vnode lock. 109 * 110 * File read operations require a shared lock, file write operations require 111 * an exclusive lock. Most directory operations (read or write) currently 112 * require an exclusive lock due to the side effects stored in the directory 113 * inode (which we intend to fix). 114 * 115 * File reads and writes are further protected by a range lock. The intention 116 * is to be able to break I/O operations down into more easily managed pieces 117 * so vm_page arrays can be passed through rather then UIOs. This work will 118 * occur in multiple stages. The range locks will also eventually be used to 119 * deal with clustered cache coherency issues and, more immediately, to 120 * protect operations associated with the kernel-managed journaling module. 121 * 122 * NOTE: Certain fields within the vnode structure requires v_token to be 123 * held. The vnode's normal lock need not be held when accessing 124 * these fields as long as the vnode is deterministically referenced 125 * (i.e. can't be ripped out from under the caller). This is typical 126 * for code paths based on descriptors or file pointers, but not for 127 * backdoor code paths that come in via the buffer cache. 128 * 129 * v_rbclean_tree 130 * v_rbdirty_tree 131 * v_rbhash_tree 132 * v_pollinfo 133 * 134 * NOTE: The vnode operations vector, v_ops, is a double-indirect that 135 * typically points to &v_mount->mnt_vn_use_ops. We use a double 136 * pointer because mnt_vn_use_ops may change dynamically when e.g. 137 * journaling is turned on or off. 138 * 139 * NOTE: v_filesize is currently only applicable when a VM object is 140 * associated with the vnode. Otherwise it will be set to NOOFFSET. 141 * 142 * NOTE: The following fields require a spin or token lock. Note that 143 * additional subsystems may use v_token or v_spin for other 144 * purposes, e.g. vfs/fifofs/fifo_vnops.c 145 * 146 * v_namecache v_spin 147 * v_rb* v_token 148 */ 149 RB_HEAD(buf_rb_tree, buf); 150 RB_HEAD(buf_rb_hash, buf); 151 152 struct vnode { 153 struct spinlock v_spin; 154 int v_flag; /* vnode flags (see below) */ 155 int v_writecount; 156 int v_opencount; /* number of explicit opens */ 157 int v_auxrefs; /* auxiliary references */ 158 int v_refcnt; 159 struct bio_track v_track_read; /* track I/O's in progress */ 160 struct bio_track v_track_write; /* track I/O's in progress */ 161 struct mount *v_mount; /* ptr to vfs we are in */ 162 struct vop_ops **v_ops; /* vnode operations vector */ 163 TAILQ_ENTRY(vnode) v_list; /* vnode act/inact/cache/free */ 164 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ 165 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 166 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */ 167 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */ 168 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */ 169 enum vtype v_type; /* vnode type */ 170 int16_t v_act; /* use heuristic */ 171 int16_t v_state; /* active/free/cached */ 172 union { 173 struct socket *vu_socket; /* unix ipc (VSOCK) */ 174 struct { 175 int vu_umajor; /* device number for attach */ 176 int vu_uminor; 177 struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */ 178 SLIST_ENTRY(vnode) vu_cdevnext; 179 } vu_cdev; 180 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 181 } v_un; 182 off_t v_filesize; /* file EOF or NOOFFSET */ 183 off_t v_lazyw; /* lazy write iterator */ 184 struct vm_object *v_object; /* Place to store VM object */ 185 struct lock v_lock; /* file/dir ops lock */ 186 struct lwkt_token v_token; /* (see above) */ 187 enum vtagtype v_tag; /* type of underlying data */ 188 void *v_data; /* private data for fs */ 189 struct namecache_list v_namecache; /* (S) associated nc entries */ 190 struct { 191 struct kqinfo vpi_kqinfo; /* identity of poller(s) */ 192 } v_pollinfo; 193 struct vmresident *v_resident; /* optional vmresident */ 194 struct mount *v_pfsmp; /* real mp for pfs/nullfs mt */ 195 #ifdef DEBUG_LOCKS 196 const char *filename; /* Source file doing locking */ 197 int line; /* Line number doing locking */ 198 #endif 199 }; 200 #define v_socket v_un.vu_socket 201 #define v_umajor v_un.vu_cdev.vu_umajor 202 #define v_uminor v_un.vu_cdev.vu_uminor 203 #define v_rdev v_un.vu_cdev.vu_cdevinfo 204 #define v_cdevnext v_un.vu_cdev.vu_cdevnext 205 #define v_fifoinfo v_un.vu_fifoinfo 206 207 /* 208 * Vnode flags. 209 */ 210 #define VROOT 0x00000001 /* root of its file system */ 211 #define VTEXT 0x00000002 /* vnode is a pure text prototype */ 212 #define VSYSTEM 0x00000004 /* vnode being used by kernel */ 213 #define VISTTY 0x00000008 /* vnode represents a tty */ 214 #define VCTTYISOPEN 0x00000010 /* controlling terminal tty is open */ 215 #define VCKPT 0x00000020 /* checkpoint-restored vnode */ 216 /* open for business 0x00000040 */ 217 #define VMAYHAVELOCKS 0x00000080 /* maybe posix or flock locks on vp */ 218 #define VPFSROOT 0x00000100 /* may be a pseudo filesystem root */ 219 /* open for business 0x00000200 */ 220 #define VAGE0 0x00000400 /* Age count for recycling - 2 bits */ 221 #define VAGE1 0x00000800 /* Age count for recycling - 2 bits */ 222 /* open for business 0x00001000 */ 223 #define VOBJBUF 0x00002000 /* Allocate buffers in VM object */ 224 #define VINACTIVE 0x00004000 /* ran VOP_INACTIVE */ 225 /* open for business 0x00008000 */ 226 /* open for business 0x00010000 */ 227 /* open for business 0x00020000 */ 228 #define VRECLAIMED 0x00040000 /* This vnode has been destroyed */ 229 /* open for business 0x00080000 */ 230 #define VNOTSEEKABLE 0x00100000 /* rd/wr ignores file offset */ 231 #define VONWORKLST 0x00200000 /* On syncer work-list */ 232 #define VISDIRTY 0x00400000 /* inode dirty from VFS */ 233 #define VOBJDIRTY 0x00800000 /* object might be dirty */ 234 #define VSWAPCACHE 0x01000000 /* enable swapcache */ 235 /* open for business 0x02000000 */ 236 /* open for business 0x04000000 */ 237 238 /* 239 * v_state flags (v_state is interlocked by v_spin and vfs_spin) 240 */ 241 #define VS_CACHED 0 242 #define VS_ACTIVE 1 243 #define VS_INACTIVE 2 244 #define VS_DYING 3 245 246 /* 247 * v_refcnt uses bit 30 to flag that 1->0 transitions require finalization 248 * (actual deactivation) and bit 31 to indicate that deactivation is in 249 * progress. 250 * 251 * The VREFCNT() macro returns a negative number if the vnode is undergoing 252 * termination (value should not be interpreted beyond being negative), 253 * zero if it is cached and has no references, or a positive number 254 * indicating the number of refs. 255 */ 256 #define VREF_TERMINATE 0x80000000 /* termination in progress */ 257 #define VREF_FINALIZE 0x40000000 /* deactivate on last vrele */ 258 #define VREF_MASK 0xBFFFFFFF /* includes VREF_TERMINATE */ 259 260 #define VREFCNT(vp) ((int)((vp)->v_refcnt & VREF_MASK)) 261 262 /* 263 * vmntvnodescan() flags 264 */ 265 #define VMSC_GETVP 0x01 266 #define VMSC_GETVX 0x02 267 #define VMSC_NOWAIT 0x10 268 #define VMSC_ONEPASS 0x20 269 270 /* 271 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 272 * help with write clustering) 273 */ 274 #define IO_UNIT 0x0001 /* do I/O as atomic unit */ 275 #define IO_APPEND 0x0002 /* append write to end */ 276 #define IO_SYNC 0x0004 /* do I/O synchronously */ 277 #define IO_NODELOCKED 0x0008 /* underlying node already locked */ 278 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 279 #define IO_VMIO 0x0020 /* data already in VMIO space */ 280 #define IO_INVAL 0x0040 /* invalidate after I/O */ 281 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 282 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 283 #define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */ 284 #define IO_CORE 0x0400 /* I/O is part of core dump */ 285 #define IO_NRDELAY 0x0800 /* do not block on disk reads */ 286 287 #define IO_SEQMAX 0x7F /* seq heuristic max value */ 288 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 289 290 /* 291 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID, 292 * and SVTX flag bits. 293 */ 294 #define VSUID 04000 /* set user id on execution */ 295 #define VSGID 02000 /* set group id on execution */ 296 #define VSVTX 01000 /* save swapped text even after use */ 297 #define VREAD 00400 /* read, write, execute permissions */ 298 #define VWRITE 00200 299 #define VEXEC 00100 300 301 /* 302 * Token indicating no attribute value yet assigned. 303 */ 304 #define VNOVAL (-1) 305 306 /* 307 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 308 */ 309 #define VLKTIMEOUT (hz / 20 + 1) 310 311 #ifdef _KERNEL 312 313 /* 314 * Convert between vnode types and inode formats (since POSIX.1 315 * defines mode word of stat structure in terms of inode formats). 316 */ 317 extern enum vtype iftovt_tab[]; 318 extern int vttoif_tab[]; 319 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 320 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 321 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 322 323 /* 324 * Flags to various vnode functions. 325 */ 326 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 327 #define FORCECLOSE 0x0002 /* vflush: force file closure */ 328 #define WRITECLOSE 0x0004 /* vflush: only close writable files */ 329 #define DOCLOSE 0x0008 /* vclean: close active files */ 330 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 331 332 #ifdef DIAGNOSTIC 333 #define VATTR_NULL(vap) vattr_null(vap) 334 #else 335 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 336 #endif /* DIAGNOSTIC */ 337 338 #define NULLVP ((struct vnode *)NULL) 339 340 #define VNODEOP_SET(f) \ 341 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \ 342 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f); 343 344 /* 345 * Global vnode data. 346 */ 347 struct objcache; 348 349 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 350 extern struct nchandle rootnch; /* root (i.e. "/") namecache */ 351 extern int desiredvnodes; /* number of vnodes desired */ 352 extern time_t syncdelay; /* max time to delay syncing data */ 353 extern time_t filedelay; /* time to delay syncing files */ 354 extern time_t dirdelay; /* time to delay syncing directories */ 355 extern time_t metadelay; /* time to delay syncing metadata */ 356 extern struct objcache *namei_oc; 357 extern int prtactive; /* nonzero to call vprint() */ 358 extern struct vattr va_null; /* predefined null vattr structure */ 359 extern int numvnodes; 360 extern int inactivevnodes; 361 extern int activevnodes; 362 extern int cachedvnodes; 363 364 /* 365 * This macro is very helpful in defining those offsets in the vdesc struct. 366 * 367 * This is stolen from X11R4. I ignored all the fancy stuff for 368 * Crays, so if you decide to port this to such a serious machine, 369 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 370 */ 371 #define VOPARG_OFFSET(p_type,field) \ 372 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 373 #define VOPARG_OFFSETOF(s_type,field) \ 374 VOPARG_OFFSET(s_type*,field) 375 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 376 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 377 378 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *); 379 380 /* 381 * VOCALL calls an op given an ops vector. We break it out because BSD's 382 * vclean changes the ops vector and then wants to call ops with the old 383 * vector. 384 */ 385 386 typedef int (*vocall_func_t)(struct vop_generic_args *); 387 388 /* 389 * This call executes the vops vector for the offset stored in the ap's 390 * descriptor of the passed vops rather then the one related to the 391 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of 392 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops 393 * vector function). 394 */ 395 #define VOCALL(vops, ap) \ 396 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap) 397 398 #define VDESC(OP) (& __CONCAT(OP,_desc)) 399 400 /* 401 * Public vnode manipulation functions. 402 */ 403 struct file; 404 struct mount; 405 struct nlookupdata; 406 struct proc; 407 struct thread; 408 struct stat; 409 struct ucred; 410 struct uio; 411 struct vattr; 412 struct vnode; 413 struct syncer_ctx; 414 415 struct vnode *getsynthvnode(const char *devname); 416 void addaliasu (struct vnode *vp, int x, int y); 417 int v_associate_rdev(struct vnode *vp, cdev_t dev); 418 void v_release_rdev(struct vnode *vp); 419 int bdevvp (cdev_t dev, struct vnode **vpp); 420 struct vnode *allocvnode(int lktimeout, int lkflags); 421 void allocvnode_gc(void); 422 int freesomevnodes(int count); 423 int getnewvnode (enum vtagtype tag, struct mount *mp, 424 struct vnode **vpp, int timo, int lkflags); 425 int getspecialvnode (enum vtagtype tag, struct mount *mp, 426 struct vop_ops **ops, struct vnode **vpp, int timo, 427 int lkflags); 428 void speedup_syncer (struct mount *mp); 429 int vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *); 430 void vattr_null (struct vattr *vap); 431 int vcount (struct vnode *vp); 432 int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp); 433 void vfs_nadd_vnodeops_sysinit (void *); 434 void vfs_nrm_vnodeops_sysinit (void *); 435 void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **); 436 void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **); 437 int vflush (struct mount *mp, int rootrefs, int flags); 438 439 int vmntvnodescan(struct mount *mp, int flags, 440 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data), 441 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data), 442 void *data); 443 int vsyncscan(struct mount *mp, int flags, 444 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data), 445 void *data); 446 void vclrisdirty(struct vnode *vp); 447 void vclrobjdirty(struct vnode *vp); 448 void vsetisdirty(struct vnode *vp); 449 void vsetobjdirty(struct vnode *vp); 450 451 void insmntque(struct vnode *vp, struct mount *mp); 452 453 void vclean_vxlocked (struct vnode *vp, int flags); 454 void vclean_unlocked (struct vnode *vp); 455 void vgone_vxlocked (struct vnode *vp); 456 int vrevoke (struct vnode *vp, struct ucred *cred); 457 int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo); 458 int vtruncbuf (struct vnode *vp, off_t length, int blksize); 459 void vnode_pager_setsize (struct vnode *, vm_ooffset_t); 460 int nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff, 461 int trivial); 462 int nvextendbuf(struct vnode *vp, off_t olength, off_t nlength, 463 int oblksize, int nblksize, 464 int oboff, int nboff, int trivial); 465 void nvnode_pager_setsize (struct vnode *vp, off_t length, 466 int blksize, int boff); 467 int vfsync(struct vnode *vp, int waitfor, int passes, 468 int (*checkdef)(struct buf *), 469 int (*waitoutput)(struct vnode *, struct thread *)); 470 int vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff); 471 void vprint (char *label, struct vnode *vp); 472 int vrecycle (struct vnode *vp); 473 int vmaxiosize (struct vnode *vp); 474 void vn_strategy(struct vnode *vp, struct bio *bio); 475 int vn_cache_strategy(struct vnode *vp, struct bio *bio); 476 int vn_close (struct vnode *vp, int flags, struct file *fp); 477 void vn_gone (struct vnode *vp); 478 int vn_isdisk (struct vnode *vp, int *errp); 479 int vn_islocked (struct vnode *vp); 480 int vn_islocked_unlock (struct vnode *vp); 481 void vn_islocked_relock (struct vnode *vp, int vpls); 482 int vn_lock (struct vnode *vp, int flags); 483 void vn_unlock (struct vnode *vp); 484 485 #ifdef DEBUG_LOCKS 486 int debug_vn_lock (struct vnode *vp, int flags, 487 const char *filename, int line); 488 #define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__) 489 #endif 490 491 /*#define DEBUG_VN_UNLOCK*/ 492 #ifdef DEBUG_VN_UNLOCK 493 void debug_vn_unlock (struct vnode *vp, 494 const char *filename, int line); 495 #define vn_unlock(vp) debug_vn_unlock(vp, __FILE__, __LINE__) 496 #endif 497 498 int vn_get_namelen(struct vnode *, int *); 499 void vn_setspecops (struct file *fp); 500 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess); 501 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode); 502 int vn_opendisk (const char *devname, int fmode, struct vnode **vpp); 503 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base, 504 int len, off_t offset, enum uio_seg segflg, int ioflg, 505 struct ucred *cred, int *aresid); 506 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base, 507 int len, off_t offset, enum uio_seg segflg, int ioflg, 508 struct ucred *cred, int *aresid); 509 int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred); 510 cdev_t vn_todev (struct vnode *vp); 511 void vfs_timestamp (struct timespec *); 512 size_t vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp); 513 void vn_mark_atime(struct vnode *vp, struct thread *td); 514 int vn_writechk (struct vnode *vp, struct nchandle *nch); 515 int ncp_writechk(struct nchandle *nch); 516 int vop_stdopen (struct vop_open_args *ap); 517 int vop_stdclose (struct vop_close_args *ap); 518 int vop_stdmountctl(struct vop_mountctl_args *ap); 519 int vop_stdgetpages(struct vop_getpages_args *ap); 520 int vop_stdputpages(struct vop_putpages_args *ap); 521 int vop_stdmarkatime(struct vop_markatime_args *ap); 522 int vop_stdnoread(struct vop_read_args *ap); 523 int vop_stdnowrite(struct vop_write_args *ap); 524 int vop_stdpathconf (struct vop_pathconf_args *ap); 525 int vop_eopnotsupp (struct vop_generic_args *ap); 526 int vop_ebadf (struct vop_generic_args *ap); 527 int vop_einval (struct vop_generic_args *ap); 528 int vop_enotty (struct vop_generic_args *ap); 529 int vop_defaultop (struct vop_generic_args *ap); 530 int vop_null (struct vop_generic_args *ap); 531 int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t, 532 const char *); 533 534 int vop_compat_nresolve(struct vop_nresolve_args *ap); 535 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap); 536 int vop_compat_ncreate(struct vop_ncreate_args *ap); 537 int vop_compat_nmkdir(struct vop_nmkdir_args *ap); 538 int vop_compat_nmknod(struct vop_nmknod_args *ap); 539 int vop_compat_nlink(struct vop_nlink_args *ap); 540 int vop_compat_nsymlink(struct vop_nsymlink_args *ap); 541 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap); 542 int vop_compat_nremove(struct vop_nremove_args *ap); 543 int vop_compat_nrmdir(struct vop_nrmdir_args *ap); 544 int vop_compat_nrename(struct vop_nrename_args *ap); 545 546 void vx_lock (struct vnode *vp); 547 void vx_unlock (struct vnode *vp); 548 void vx_get (struct vnode *vp); 549 int vx_get_nonblock (struct vnode *vp); 550 void vx_put (struct vnode *vp); 551 int vget (struct vnode *vp, int lockflag); 552 void vput (struct vnode *vp); 553 void vhold (struct vnode *); 554 void vdrop (struct vnode *); 555 void vref (struct vnode *vp); 556 void vrele (struct vnode *vp); 557 void vsetflags (struct vnode *vp, int flags); 558 void vclrflags (struct vnode *vp, int flags); 559 560 /*#define DEBUG_VPUT*/ 561 #ifdef DEBUG_VPUT 562 void debug_vput (struct vnode *vp, const char *filename, int line); 563 #define vput(vp) debug_vput(vp, __FILE__, __LINE__) 564 #endif 565 566 void vfs_subr_init(void); 567 void vfs_mount_init(void); 568 void vfs_lock_init(void); 569 void mount_init(struct mount *mp); 570 571 void vn_syncer_add(struct vnode *, int); 572 void vn_syncer_remove(struct vnode *); 573 void vn_syncer_thr_create(struct mount *); 574 void vn_syncer_thr_stop(struct mount *); 575 576 extern struct vop_ops default_vnode_vops; 577 extern struct vop_ops dead_vnode_vops; 578 579 extern struct vop_ops *default_vnode_vops_p; 580 extern struct vop_ops *dead_vnode_vops_p; 581 582 #endif /* _KERNEL */ 583 584 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 585 #endif /* !_SYS_VNODE_H_ */ 586