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 * $DragonFly: src/sys/sys/vnode.h,v 1.83 2008/09/17 21:44:19 dillon Exp $ 36 */ 37 38 #ifndef _SYS_VNODE_H_ 39 #define _SYS_VNODE_H_ 40 41 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 42 43 #ifndef _SYS_QUEUE_H_ 44 #include <sys/queue.h> 45 #endif 46 #ifndef _SYS_LOCK_H_ 47 #include <sys/lock.h> 48 #endif 49 #ifndef _SYS_EVENT_H_ 50 #include <sys/event.h> 51 #endif 52 #ifndef _SYS_BIOTRACK_H_ 53 #include <sys/biotrack.h> 54 #endif 55 #ifndef _SYS_UIO_H_ 56 #include <sys/uio.h> 57 #endif 58 #ifndef _SYS_ACL_H_ 59 #include <sys/acl.h> 60 #endif 61 #ifndef _SYS_NAMECACHE_H_ 62 #include <sys/namecache.h> 63 #endif 64 #ifndef _SYS_THREAD_H_ 65 #include <sys/thread.h> 66 #endif 67 #ifndef _SYS_VFSOPS_H_ 68 #include <sys/vfsops.h> 69 #endif 70 #ifndef _SYS_VFSCACHE_H_ 71 #include <sys/vfscache.h> 72 #endif 73 #ifndef _SYS_TREE_H_ 74 #include <sys/tree.h> 75 #endif 76 #ifndef _SYS_SYSLINK_RPC_H_ 77 #include <sys/syslink_rpc.h> 78 #endif 79 #ifndef _SYS_SYSREF_H_ 80 #include <sys/sysref.h> 81 #endif 82 #ifndef _SYS_CCMS_H_ 83 #include <sys/ccms.h> 84 #endif 85 #ifndef _MACHINE_LOCK_H_ 86 #include <machine/lock.h> 87 #endif 88 89 /* 90 * The vnode is the focus of all file activity in UNIX. There is a 91 * unique vnode allocated for each active file, each current directory, 92 * each mounted-on file, text file, and the root. 93 */ 94 95 /* 96 * Each underlying filesystem allocates its own private area and hangs 97 * it from v_data. If non-null, this area is freed in getnewvnode(). 98 */ 99 TAILQ_HEAD(buflists, buf); 100 101 /* 102 * Struct for mount options to printable formats. 103 */ 104 struct mountctl_opt { 105 int o_opt; 106 const char *o_name; 107 }; 108 109 /* 110 * Range locks protect offset ranges in files and directories at a high 111 * level, allowing the actual I/O to be broken down into smaller pieces. 112 * Range locks will eventually be integrated into the clustered cache 113 * coherency infrastructure. 114 * 115 * We use a simple data structure for now, but eventually this should 116 * probably be a btree or red-black tree. 117 */ 118 struct vrangelock; 119 120 TAILQ_HEAD(vrangelock_list, vrangelock); 121 122 struct vrangehead { 123 struct vrangelock_list vh_list; 124 }; 125 126 struct vrangelock { 127 TAILQ_ENTRY(vrangelock) vr_node; 128 int vr_flags; 129 off_t vr_offset; 130 off_t vr_length; 131 }; 132 133 #define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */ 134 #define RNGL_CHECK 0x0002 /* check for work on unlock */ 135 #define RNGL_SHARED 0x0004 /* shared lock, else exclusive */ 136 #define RNGL_ONLIST 0x0008 /* sanity check */ 137 138 static __inline 139 void 140 vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length) 141 { 142 vr->vr_flags = flags; 143 vr->vr_offset = offset; 144 vr->vr_length = length; 145 } 146 147 #ifdef _KERNEL 148 149 void vrange_lock(struct vnode *vp, struct vrangelock *vr); 150 void vrange_unlock(struct vnode *vp, struct vrangelock *vr); 151 152 static __inline 153 void 154 vrange_lock_shared(struct vnode *vp, struct vrangelock *vr, 155 off_t offset, off_t length) 156 { 157 vrange_init(vr, RNGL_SHARED, offset, length); 158 vrange_lock(vp, vr); 159 } 160 161 static __inline 162 void 163 vrange_lock_excl(struct vnode *vp, struct vrangelock *vr, 164 off_t offset, off_t length) 165 { 166 vrange_init(vr, 0, offset, length); 167 vrange_lock(vp, vr); 168 } 169 170 #endif 171 172 /* 173 * The vnode infrastructure is being reorgranized. Most reference-related 174 * fields are locked by the BGL, and most file I/O related operations and 175 * vnode teardown functions are locked by the vnode lock. 176 * 177 * File read operations require a shared lock, file write operations require 178 * an exclusive lock. Most directory operations (read or write) currently 179 * require an exclusive lock due to the side effects stored in the directory 180 * inode (which we intend to fix). 181 * 182 * File reads and writes are further protected by a range lock. The intention 183 * is to be able to break I/O operations down into more easily managed pieces 184 * so vm_page arrays can be passed through rather then UIOs. This work will 185 * occur in multiple stages. The range locks will also eventually be used to 186 * deal with clustered cache coherency issues and, more immediately, to 187 * protect operations associated with the kernel-managed journaling module. 188 * 189 * NOTE: Certain fields within the vnode structure requires v_token to be 190 * held. The vnode's normal lock need not be held when accessing 191 * these fields as long as the vnode is deterministically referenced 192 * (i.e. can't be ripped out from under the caller). This is typical 193 * for code paths based on descriptors or file pointers, but not for 194 * backdoor code paths that come in via the buffer cache. 195 * 196 * v_rbclean_tree 197 * v_rbdirty_tree 198 * v_rbhash_tree 199 * v_pollinfo 200 * 201 * NOTE: The vnode operations vector, v_ops, is a double-indirect that 202 * typically points to &v_mount->mnt_vn_use_ops. We use a double 203 * pointer because mnt_vn_use_ops may change dynamically when e.g. 204 * journaling is turned on or off. 205 * 206 * NOTE: v_filesize is currently only applicable when a VM object is 207 * associated with the vnode. Otherwise it will be set to NOOFFSET. 208 * 209 * NOTE: The following fields require a spin or token lock. Note that 210 * additional subsystems may use v_token or v_spinlock for other 211 * purposes, e.g. vfs/fifofs/fifo_vnops.c 212 * 213 * v_namecache v_spinlock 214 * v_rb* v_token 215 */ 216 RB_HEAD(buf_rb_tree, buf); 217 RB_HEAD(buf_rb_hash, buf); 218 219 struct vnode { 220 int v_flag; /* vnode flags (see below) */ 221 int v_writecount; 222 int v_opencount; /* number of explicit opens */ 223 int v_auxrefs; /* auxiliary references */ 224 struct sysref v_sysref; /* normal references */ 225 struct bio_track v_track_read; /* track I/O's in progress */ 226 struct bio_track v_track_write; /* track I/O's in progress */ 227 struct mount *v_mount; /* ptr to vfs we are in */ 228 struct vop_ops **v_ops; /* vnode operations vector */ 229 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist/cachelist */ 230 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ 231 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */ 232 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */ 233 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */ 234 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 235 enum vtype v_type; /* vnode type */ 236 union { 237 struct socket *vu_socket; /* unix ipc (VSOCK) */ 238 struct { 239 int vu_umajor; /* device number for attach */ 240 int vu_uminor; 241 struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */ 242 SLIST_ENTRY(vnode) vu_cdevnext; 243 } vu_cdev; 244 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 245 } v_un; 246 off_t v_filesize; /* file EOF or NOOFFSET */ 247 off_t v_lazyw; /* lazy write iterator */ 248 off_t v_lastw; /* last write (write cluster) */ 249 off_t v_cstart; /* start block of cluster */ 250 off_t v_lasta; /* last allocation */ 251 int v_clen; /* length of current cluster */ 252 struct vm_object *v_object; /* Place to store VM object */ 253 struct lock v_lock; /* file/dir ops lock */ 254 struct lwkt_token v_token; /* (see above) */ 255 enum vtagtype v_tag; /* type of underlying data */ 256 void *v_data; /* private data for fs */ 257 struct namecache_list v_namecache; /* (S) associated nc entries */ 258 struct { 259 struct kqinfo vpi_kqinfo; /* identity of poller(s) */ 260 } v_pollinfo; 261 struct vmresident *v_resident; /* optional vmresident */ 262 struct vrangehead v_range; /* range lock */ 263 struct ccms_dataspace v_ccms; /* cache coherency */ 264 #ifdef DEBUG_LOCKS 265 const char *filename; /* Source file doing locking */ 266 int line; /* Line number doing locking */ 267 #endif 268 void *v_xaddr; 269 }; 270 #define v_socket v_un.vu_socket 271 #define v_umajor v_un.vu_cdev.vu_umajor 272 #define v_uminor v_un.vu_cdev.vu_uminor 273 #define v_rdev v_un.vu_cdev.vu_cdevinfo 274 #define v_cdevnext v_un.vu_cdev.vu_cdevnext 275 #define v_fifoinfo v_un.vu_fifoinfo 276 #define v_spinlock v_lock.lk_spinlock 277 278 /* 279 * Vnode flags. 280 */ 281 #define VROOT 0x00000001 /* root of its file system */ 282 #define VTEXT 0x00000002 /* vnode is a pure text prototype */ 283 #define VSYSTEM 0x00000004 /* vnode being used by kernel */ 284 #define VISTTY 0x00000008 /* vnode represents a tty */ 285 #define VCTTYISOPEN 0x00000010 /* controlling terminal tty is open */ 286 #define VCKPT 0x00000020 /* checkpoint-restored vnode */ 287 /* open for business 0x00000040 */ 288 #define VMAYHAVELOCKS 0x00000080 /* maybe posix or flock locks on vp */ 289 #define VPFSROOT 0x00000100 /* may be a pseudo filesystem root */ 290 /* open for business 0x00000200 */ 291 #define VAGE0 0x00000400 /* Age count for recycling - 2 bits */ 292 #define VAGE1 0x00000800 /* Age count for recycling - 2 bits */ 293 #define VCACHED 0x00001000 /* No active references but has cache value */ 294 #define VOBJBUF 0x00002000 /* Allocate buffers in VM object */ 295 #define VINACTIVE 0x00004000 /* The vnode is inactive (did VOP_INACTIVE) */ 296 /* open for business 0x00008000 */ 297 #define VOLOCK 0x00010000 /* vnode is locked waiting for an object */ 298 #define VOWANT 0x00020000 /* a process is waiting for VOLOCK */ 299 #define VRECLAIMED 0x00040000 /* This vnode has been destroyed */ 300 #define VFREE 0x00080000 /* This vnode is on the freelist */ 301 #define VNOTSEEKABLE 0x00100000 /* rd/wr ignores file offset */ 302 #define VONWORKLST 0x00200000 /* On syncer work-list */ 303 #define VMOUNT 0x00400000 /* Mount in progress */ 304 #define VOBJDIRTY 0x00800000 /* object might be dirty */ 305 #define VSWAPCACHE 0x01000000 /* enable swapcache */ 306 /* open for business 0x02000000 */ 307 /* open for business 0x04000000 */ 308 309 /* 310 * vmntvnodescan() flags 311 */ 312 #define VMSC_GETVP 0x01 313 #define VMSC_GETVX 0x02 314 #define VMSC_NOWAIT 0x10 315 #define VMSC_ONEPASS 0x20 316 317 /* 318 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 319 * help with write clustering) 320 */ 321 #define IO_UNIT 0x0001 /* do I/O as atomic unit */ 322 #define IO_APPEND 0x0002 /* append write to end */ 323 #define IO_SYNC 0x0004 /* do I/O synchronously */ 324 #define IO_NODELOCKED 0x0008 /* underlying node already locked */ 325 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 326 #define IO_VMIO 0x0020 /* data already in VMIO space */ 327 #define IO_INVAL 0x0040 /* invalidate after I/O */ 328 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 329 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 330 #define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */ 331 #define IO_CORE 0x0400 /* I/O is part of core dump */ 332 333 #define IO_SEQMAX 0x7F /* seq heuristic max value */ 334 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 335 336 /* 337 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID, 338 * and SVTX flag bits. 339 */ 340 #define VSUID 04000 /* set user id on execution */ 341 #define VSGID 02000 /* set group id on execution */ 342 #define VSVTX 01000 /* save swapped text even after use */ 343 #define VREAD 00400 /* read, write, execute permissions */ 344 #define VWRITE 00200 345 #define VEXEC 00100 346 347 /* 348 * Token indicating no attribute value yet assigned. 349 */ 350 #define VNOVAL (-1) 351 352 /* 353 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 354 */ 355 #define VLKTIMEOUT (hz / 20 + 1) 356 357 #ifdef _KERNEL 358 359 /* 360 * Convert between vnode types and inode formats (since POSIX.1 361 * defines mode word of stat structure in terms of inode formats). 362 */ 363 extern enum vtype iftovt_tab[]; 364 extern int vttoif_tab[]; 365 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 366 #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 367 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 368 369 /* 370 * Flags to various vnode functions. 371 */ 372 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 373 #define FORCECLOSE 0x0002 /* vflush: force file closure */ 374 #define WRITECLOSE 0x0004 /* vflush: only close writable files */ 375 #define DOCLOSE 0x0008 /* vclean: close active files */ 376 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 377 378 #ifdef DIAGNOSTIC 379 #define VATTR_NULL(vap) vattr_null(vap) 380 #else 381 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 382 #endif /* DIAGNOSTIC */ 383 384 #define NULLVP ((struct vnode *)NULL) 385 386 #define VNODEOP_SET(f) \ 387 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \ 388 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f); 389 390 /* 391 * Global vnode data. 392 */ 393 struct objcache; 394 395 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 396 extern struct nchandle rootnch; /* root (i.e. "/") namecache */ 397 extern int desiredvnodes; /* number of vnodes desired */ 398 extern time_t syncdelay; /* max time to delay syncing data */ 399 extern time_t filedelay; /* time to delay syncing files */ 400 extern time_t dirdelay; /* time to delay syncing directories */ 401 extern time_t metadelay; /* time to delay syncing metadata */ 402 extern struct objcache *namei_oc; 403 extern int prtactive; /* nonzero to call vprint() */ 404 extern struct vattr va_null; /* predefined null vattr structure */ 405 extern int vfs_ioopt; 406 extern int numvnodes; 407 extern int freevnodes; 408 409 /* 410 * Interlock for scanning list of vnodes attached to a mountpoint 411 */ 412 extern struct lwkt_token mntvnode_token; 413 414 /* 415 * This macro is very helpful in defining those offsets in the vdesc struct. 416 * 417 * This is stolen from X11R4. I ignored all the fancy stuff for 418 * Crays, so if you decide to port this to such a serious machine, 419 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 420 */ 421 #define VOPARG_OFFSET(p_type,field) \ 422 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 423 #define VOPARG_OFFSETOF(s_type,field) \ 424 VOPARG_OFFSET(s_type*,field) 425 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 426 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 427 428 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *); 429 430 /* 431 * VOCALL calls an op given an ops vector. We break it out because BSD's 432 * vclean changes the ops vector and then wants to call ops with the old 433 * vector. 434 */ 435 436 typedef int (*vocall_func_t)(struct vop_generic_args *); 437 438 /* 439 * This call executes the vops vector for the offset stored in the ap's 440 * descriptor of the passed vops rather then the one related to the 441 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of 442 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops 443 * vector function). 444 */ 445 #define VOCALL(vops, ap) \ 446 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap) 447 448 #define VDESC(OP) (& __CONCAT(OP,_desc)) 449 450 /* 451 * Public vnode manipulation functions. 452 */ 453 struct file; 454 struct mount; 455 struct nlookupdata; 456 struct proc; 457 struct thread; 458 struct stat; 459 struct ucred; 460 struct uio; 461 struct vattr; 462 struct vnode; 463 464 struct vnode *getsynthvnode(const char *devname); 465 void addaliasu (struct vnode *vp, int x, int y); 466 int v_associate_rdev(struct vnode *vp, cdev_t dev); 467 void v_release_rdev(struct vnode *vp); 468 int bdevvp (cdev_t dev, struct vnode **vpp); 469 struct vnode *allocvnode(int lktimeout, int lkflags); 470 int freesomevnodes(int count); 471 int getnewvnode (enum vtagtype tag, struct mount *mp, 472 struct vnode **vpp, int timo, int lkflags); 473 int getspecialvnode (enum vtagtype tag, struct mount *mp, 474 struct vop_ops **ops, struct vnode **vpp, int timo, 475 int lkflags); 476 int speedup_syncer (void); 477 int vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *); 478 void vattr_null (struct vattr *vap); 479 int vcount (struct vnode *vp); 480 int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp); 481 void vfs_nadd_vnodeops_sysinit (void *); 482 void vfs_nrm_vnodeops_sysinit (void *); 483 void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **); 484 void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **); 485 int vflush (struct mount *mp, int rootrefs, int flags); 486 int vmntvnodescan(struct mount *mp, int flags, 487 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data), 488 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data), 489 void *data); 490 void insmntque(struct vnode *vp, struct mount *mp); 491 492 void vclean_vxlocked (struct vnode *vp, int flags); 493 void vclean_unlocked (struct vnode *vp); 494 void vgone_vxlocked (struct vnode *vp); 495 int vrevoke (struct vnode *vp, struct ucred *cred); 496 int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo); 497 int vtruncbuf (struct vnode *vp, off_t length, int blksize); 498 void vnode_pager_setsize (struct vnode *, vm_ooffset_t); 499 int nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff); 500 int nvextendbuf(struct vnode *vp, off_t olength, off_t nlength, 501 int oblksize, int nblksize, 502 int oboff, int nboff, int trivial); 503 void nvnode_pager_setsize (struct vnode *vp, off_t length, 504 int blksize, int boff); 505 int vfsync(struct vnode *vp, int waitfor, int passes, 506 int (*checkdef)(struct buf *), 507 int (*waitoutput)(struct vnode *, struct thread *)); 508 int vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff); 509 void vprint (char *label, struct vnode *vp); 510 int vrecycle (struct vnode *vp); 511 int vmaxiosize (struct vnode *vp); 512 void vn_strategy(struct vnode *vp, struct bio *bio); 513 int vn_cache_strategy(struct vnode *vp, struct bio *bio); 514 int vn_close (struct vnode *vp, int flags); 515 void vn_gone (struct vnode *vp); 516 int vn_isdisk (struct vnode *vp, int *errp); 517 int vn_lock (struct vnode *vp, int flags); 518 int vn_islocked (struct vnode *vp); 519 int vn_islocked_unlock (struct vnode *vp); 520 void vn_islocked_relock (struct vnode *vp, int vpls); 521 void vn_unlock (struct vnode *vp); 522 #ifdef DEBUG_LOCKS 523 int debug_vn_lock (struct vnode *vp, int flags, 524 const char *filename, int line); 525 #define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__) 526 #endif 527 528 int vn_get_namelen(struct vnode *, int *); 529 void vn_setspecops (struct file *fp); 530 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess); 531 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode); 532 int vn_opendisk (const char *devname, int fmode, struct vnode **vpp); 533 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base, 534 int len, off_t offset, enum uio_seg segflg, int ioflg, 535 struct ucred *cred, int *aresid); 536 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base, 537 int len, off_t offset, enum uio_seg segflg, int ioflg, 538 struct ucred *cred, int *aresid); 539 int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred); 540 cdev_t vn_todev (struct vnode *vp); 541 void vfs_timestamp (struct timespec *); 542 size_t vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp); 543 void vn_mark_atime(struct vnode *vp, struct thread *td); 544 int vn_writechk (struct vnode *vp, struct nchandle *nch); 545 int ncp_writechk(struct nchandle *nch); 546 int vop_stdopen (struct vop_open_args *ap); 547 int vop_stdclose (struct vop_close_args *ap); 548 int vop_stdmountctl(struct vop_mountctl_args *ap); 549 int vop_stdgetpages(struct vop_getpages_args *ap); 550 int vop_stdputpages(struct vop_putpages_args *ap); 551 int vop_stdmarkatime(struct vop_markatime_args *ap); 552 int vop_stdnoread(struct vop_read_args *ap); 553 int vop_stdnowrite(struct vop_write_args *ap); 554 int vop_stdpathconf (struct vop_pathconf_args *ap); 555 int vop_eopnotsupp (struct vop_generic_args *ap); 556 int vop_ebadf (struct vop_generic_args *ap); 557 int vop_einval (struct vop_generic_args *ap); 558 int vop_enotty (struct vop_generic_args *ap); 559 int vop_defaultop (struct vop_generic_args *ap); 560 int vop_null (struct vop_generic_args *ap); 561 int vop_panic (struct vop_generic_args *ap); 562 int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t, 563 const char *); 564 565 int vop_compat_nresolve(struct vop_nresolve_args *ap); 566 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap); 567 int vop_compat_ncreate(struct vop_ncreate_args *ap); 568 int vop_compat_nmkdir(struct vop_nmkdir_args *ap); 569 int vop_compat_nmknod(struct vop_nmknod_args *ap); 570 int vop_compat_nlink(struct vop_nlink_args *ap); 571 int vop_compat_nsymlink(struct vop_nsymlink_args *ap); 572 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap); 573 int vop_compat_nremove(struct vop_nremove_args *ap); 574 int vop_compat_nrmdir(struct vop_nrmdir_args *ap); 575 int vop_compat_nrename(struct vop_nrename_args *ap); 576 577 void vx_lock (struct vnode *vp); 578 void vx_unlock (struct vnode *vp); 579 void vx_get (struct vnode *vp); 580 int vx_get_nonblock (struct vnode *vp); 581 void vx_put (struct vnode *vp); 582 int vget (struct vnode *vp, int lockflag); 583 void vput (struct vnode *vp); 584 void vhold (struct vnode *); 585 void vhold_interlocked (struct vnode *); 586 void vdrop (struct vnode *); 587 void vref (struct vnode *vp); 588 void vrele (struct vnode *vp); 589 void vsetflags (struct vnode *vp, int flags); 590 void vclrflags (struct vnode *vp, int flags); 591 592 void vfs_subr_init(void); 593 void vfs_mount_init(void); 594 void vfs_lock_init(void); 595 void vfs_sync_init(void); 596 void mount_init(struct mount *mp); 597 598 void vn_syncer_add_to_worklist(struct vnode *, int); 599 void vnlru_proc_wait(void); 600 601 extern struct vop_ops default_vnode_vops; 602 extern struct vop_ops dead_vnode_vops; 603 604 extern struct vop_ops *default_vnode_vops_p; 605 extern struct vop_ops *dead_vnode_vops_p; 606 607 #endif /* _KERNEL */ 608 609 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 610 #endif /* !_SYS_VNODE_H_ */ 611