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