2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
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14 * may be used to endorse or promote products derived from this software
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29 * @(#)vnode.h 8.7 (Berkeley) 2/4/94
36 #include <sys/bufobj.h>
37 #include <sys/queue.h>
39 #include <sys/lockmgr.h>
40 #include <sys/mutex.h>
41 #include <sys/selinfo.h>
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.
53 * Vnode types. VNON means no type.
55 enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD,
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().
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 */
73 * Reading or writing any of these items requires holding the appropriate lock.
84 * u - Only a reference to the vnode is needed to read.
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().
97 #if defined(_KERNEL) || defined(_KVM_VNODE)
101 * Fields which define the identity of the vnode. These fields are
102 * owned by the filesystem (XXX: and vgone() ?)
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 */
110 * Filesystem instance stuff
112 struct mount *v_mount; /* u ptr to vfs we are in */
113 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
116 * Type specific fields, only one applies to any given vnode.
117 * See #defines below for renaming to v_* namespace.
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) */
128 * vfs_hash: (mount + inode) -> vnode hash.
130 LIST_ENTRY(vnode) v_hashlist;
134 * VFS_namecache stuff
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 */
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 */
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 */
161 * The machinery of being a vnode
163 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
164 struct bufobj v_bufobj; /* * Buffer cache object */
167 * Hooks for various subsystems and features.
169 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
170 struct label *v_label; /* MAC label for vnode */
171 struct lockf *v_lockf; /* Byte-level lock list */
174 #endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
176 #define v_mountedhere v_un.vu_mount
177 #define v_socket v_un.vu_socket
178 #define v_rdev v_un.vu_cdev
179 #define v_fifoinfo v_un.vu_fifoinfo
180 #define v_yield v_un.vu_yield
182 /* XXX: These are temporary to avoid a source sweep at this time */
183 #define v_object v_bufobj.bo_object
186 * Userland version of struct vnode, for sysctl.
189 size_t xv_size; /* sizeof(struct xvnode) */
190 void *xv_vnode; /* address of real vnode */
191 u_long xv_flag; /* vnode vflags */
192 int xv_usecount; /* reference count of users */
193 int xv_writecount; /* reference count of writers */
194 int xv_holdcnt; /* page & buffer references */
195 u_long xv_id; /* capability identifier */
196 void *xv_mount; /* address of parent mount */
197 long xv_numoutput; /* num of writes in progress */
198 enum vtype xv_type; /* vnode type */
200 void *xvu_socket; /* socket, if VSOCK */
201 void *xvu_fifo; /* fifo, if VFIFO */
202 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
204 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
205 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
209 #define xv_socket xv_un.xvu_socket
210 #define xv_fifo xv_un.xvu_fifo
211 #define xv_rdev xv_un.xvu_rdev
212 #define xv_dev xv_un.xv_uns.xvu_dev
213 #define xv_ino xv_un.xv_uns.xvu_ino
215 /* We don't need to lock the knlist */
216 #define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \
217 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note))
219 #define VN_KNOTE(vp, b, a) \
221 if (!VN_KNLIST_EMPTY(vp)) \
222 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
224 #define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
225 #define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
229 * VI flags are protected by interlock and live in v_iflag
230 * VV flags are protected by the vnode lock and live in v_vflag
232 * VI_DOOMED is doubly protected by the interlock and vnode lock. Both
233 * are required for writing but the status may be checked with either.
235 #define VI_MOUNT 0x0020 /* Mount in progress */
236 #define VI_AGE 0x0040 /* Insert vnode at head of free list */
237 #define VI_DOOMED 0x0080 /* This vnode is being recycled */
238 #define VI_FREE 0x0100 /* This vnode is on the freelist */
239 #define VI_OBJDIRTY 0x0400 /* object might be dirty */
240 #define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
241 #define VI_OWEINACT 0x1000 /* Need to call inactive */
243 #define VV_ROOT 0x0001 /* root of its filesystem */
244 #define VV_ISTTY 0x0002 /* vnode represents a tty */
245 #define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
246 #define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
247 #define VV_TEXT 0x0020 /* vnode is a pure text prototype */
248 #define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
249 #define VV_SYSTEM 0x0080 /* vnode being used by kernel */
250 #define VV_PROCDEP 0x0100 /* vnode is process dependent */
251 #define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */
252 #define VV_DELETED 0x0400 /* should be removed */
253 #define VV_MD 0x0800 /* vnode backs the md device */
254 #define VV_FORCEINSMQ 0x1000 /* force the insmntque to succeed */
257 * Vnode attributes. A field value of VNOVAL represents a field whose value
258 * is unavailable (getattr) or which is not to be changed (setattr).
261 enum vtype va_type; /* vnode type (for create) */
262 u_short va_mode; /* files access mode and type */
263 short va_nlink; /* number of references to file */
264 uid_t va_uid; /* owner user id */
265 gid_t va_gid; /* owner group id */
266 dev_t va_fsid; /* filesystem id */
267 long va_fileid; /* file id */
268 u_quad_t va_size; /* file size in bytes */
269 long va_blocksize; /* blocksize preferred for i/o */
270 struct timespec va_atime; /* time of last access */
271 struct timespec va_mtime; /* time of last modification */
272 struct timespec va_ctime; /* time file changed */
273 struct timespec va_birthtime; /* time file created */
274 u_long va_gen; /* generation number of file */
275 u_long va_flags; /* flags defined for file */
276 dev_t va_rdev; /* device the special file represents */
277 u_quad_t va_bytes; /* bytes of disk space held by file */
278 u_quad_t va_filerev; /* file modification number */
279 u_int va_vaflags; /* operations flags, see below */
280 long va_spare; /* remain quad aligned */
284 * Flags for va_vaflags.
286 #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
287 #define VA_EXCLUSIVE 0x02 /* exclusive create request */
288 #define VA_MARK_ATIME 0x04 /* setting atime for execve/mmap */
291 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
292 * help with write clustering)
293 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
295 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
296 #define IO_APPEND 0x0002 /* append write to end */
297 #define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
298 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
299 #define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
300 #define IO_VMIO 0x0020 /* data already in VMIO space */
301 #define IO_INVAL 0x0040 /* invalidate after I/O */
302 #define IO_SYNC 0x0080 /* do I/O synchronously */
303 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
304 #define IO_EXT 0x0400 /* operate on external attributes */
305 #define IO_NORMAL 0x0800 /* operate on regular data */
306 #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
308 #define IO_SEQMAX 0x7F /* seq heuristic max value */
309 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
312 * Modes. Some values same as Ixxx entries from inode.h for now.
314 #define VEXEC 000100 /* execute/search permission */
315 #define VWRITE 000200 /* write permission */
316 #define VREAD 000400 /* read permission */
317 #define VADMIN 010000 /* permission to administer */
318 #define VSTAT 020000 /* permission to retrieve attrs */
319 #define VAPPEND 040000 /* permission to write/append */
320 #define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
323 * Token indicating no attribute value yet assigned.
328 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
330 #define VLKTIMEOUT (hz / 20 + 1)
334 #ifdef MALLOC_DECLARE
335 MALLOC_DECLARE(M_VNODE);
339 * Convert between vnode types and inode formats (since POSIX.1
340 * defines mode word of stat structure in terms of inode formats).
342 extern enum vtype iftovt_tab[];
343 extern int vttoif_tab[];
344 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
345 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
346 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
349 * Flags to various vnode functions.
351 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
352 #define FORCECLOSE 0x0002 /* vflush: force file closure */
353 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
354 #define DOCLOSE 0x0008 /* vclean: close active files */
355 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
356 #define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
357 #define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
358 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
359 #define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
360 #define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
361 #define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
363 #define VREF(vp) vref(vp)
366 #define VATTR_NULL(vap) vattr_null(vap)
368 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
369 #endif /* DIAGNOSTIC */
371 #define NULLVP ((struct vnode *)NULL)
376 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
377 extern int async_io_version; /* 0 or POSIX version of AIO i'face */
378 extern int desiredvnodes; /* number of vnodes desired */
379 extern struct uma_zone *namei_zone;
380 extern int prtactive; /* nonzero to call vprint() */
381 extern struct vattr va_null; /* predefined null vattr structure */
384 * Macro/function to check for client cache inconsistency w.r.t. leasing.
386 #define LEASE_READ 0x1 /* Check lease for readers */
387 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
389 extern void (*lease_updatetime)(int deltat);
391 #define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
392 #define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags))
393 #define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
394 #define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
395 #define VI_MTX(vp) (&(vp)->v_interlock)
397 #define VN_LOCK_AREC(vp) \
398 ((vp)->v_vnlock->lock_object.lo_flags |= LK_CANRECURSE)
399 #define VN_LOCK_ASHARE(vp) \
400 ((vp)->v_vnlock->lock_object.lo_flags &= ~LK_NOSHARE)
405 * Mods for extensibility.
409 * Flags for vdesc_flags:
411 #define VDESC_MAX_VPS 16
412 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
413 #define VDESC_VP0_WILLRELE 0x0001
414 #define VDESC_VP1_WILLRELE 0x0002
415 #define VDESC_VP2_WILLRELE 0x0004
416 #define VDESC_VP3_WILLRELE 0x0008
417 #define VDESC_NOMAP_VPP 0x0100
418 #define VDESC_VPP_WILLRELE 0x0200
421 * A generic structure.
422 * This can be used by bypass routines to identify generic arguments.
424 struct vop_generic_args {
425 struct vnodeop_desc *a_desc;
426 /* other random data follows, presumably */
429 typedef int vop_bypass_t(struct vop_generic_args *);
432 * VDESC_NO_OFFSET is used to identify the end of the offset list
433 * and in places where no such field exists.
435 #define VDESC_NO_OFFSET -1
438 * This structure describes the vnode operation taking place.
440 struct vnodeop_desc {
441 char *vdesc_name; /* a readable name for debugging */
442 int vdesc_flags; /* VDESC_* flags */
443 vop_bypass_t *vdesc_call; /* Function to call */
446 * These ops are used by bypass routines to map and locate arguments.
447 * Creds and procs are not needed in bypass routines, but sometimes
448 * they are useful to (for example) transport layers.
449 * Nameidata is useful because it has a cred in it.
451 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
452 int vdesc_vpp_offset; /* return vpp location */
453 int vdesc_cred_offset; /* cred location, if any */
454 int vdesc_thread_offset; /* thread location, if any */
455 int vdesc_componentname_offset; /* if any */
460 * A list of all the operation descs.
462 extern struct vnodeop_desc *vnodeop_descs[];
464 #define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
465 #define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
466 ((s_type)(((char*)(struct_p)) + (s_offset)))
469 #ifdef DEBUG_VFS_LOCKS
471 * Support code to aid in debugging VFS locking problems. Not totally
472 * reliable since if the thread sleeps between changing the lock
473 * state and checking it with the assert, some other thread could
474 * change the state. They are good enough for debugging a single
475 * filesystem using a single-threaded test.
477 void assert_vi_locked(struct vnode *vp, const char *str);
478 void assert_vi_unlocked(struct vnode *vp, const char *str);
479 void assert_vop_elocked(struct vnode *vp, const char *str);
481 void assert_vop_elocked_other(struct vnode *vp, const char *str);
483 void assert_vop_locked(struct vnode *vp, const char *str);
485 voi0 assert_vop_slocked(struct vnode *vp, const char *str);
487 void assert_vop_unlocked(struct vnode *vp, const char *str);
489 #define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
490 #define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
491 #define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
493 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
495 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
497 #define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
499 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
501 #else /* !DEBUG_VFS_LOCKS */
503 #define ASSERT_VI_LOCKED(vp, str)
504 #define ASSERT_VI_UNLOCKED(vp, str)
505 #define ASSERT_VOP_ELOCKED(vp, str)
507 #define ASSERT_VOP_ELOCKED_OTHER(vp, str)
509 #define ASSERT_VOP_LOCKED(vp, str)
511 #define ASSERT_VOP_SLOCKED(vp, str)
513 #define ASSERT_VOP_UNLOCKED(vp, str)
514 #endif /* DEBUG_VFS_LOCKS */
518 * This call works for vnodes in the kernel.
520 #define VCALL(c) ((c)->a_desc->vdesc_call(c))
523 * VMIO support inline
526 extern int vmiodirenable;
529 vn_canvmio(struct vnode *vp)
531 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
537 * Finally, include the default set of vnode operations.
539 #include "vnode_if.h"
542 * Public vnode manipulation functions.
544 struct componentname;
558 extern int (*lease_check_hook)(struct vop_lease_args *);
560 /* cache_* may belong in namei.h. */
561 void cache_enter(struct vnode *dvp, struct vnode *vp,
562 struct componentname *cnp);
563 int cache_lookup(struct vnode *dvp, struct vnode **vpp,
564 struct componentname *cnp);
565 void cache_purge(struct vnode *vp);
566 void cache_purgevfs(struct mount *mp);
567 int change_dir(struct vnode *vp, struct thread *td);
568 int change_root(struct vnode *vp, struct thread *td);
569 void cvtstat(struct stat *st, struct ostat *ost);
570 void cvtnstat(struct stat *sb, struct nstat *nsb);
571 int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
573 int insmntque1(struct vnode *vp, struct mount *mp,
574 void (*dtr)(struct vnode *, void *), void *dtr_arg);
575 int insmntque(struct vnode *vp, struct mount *mp);
576 u_quad_t init_va_filerev(void);
577 int lease_check(struct vop_lease_args *ap);
578 int speedup_syncer(void);
579 #define textvp_fullpath(p, rb, rfb) \
580 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
581 int vn_fullpath(struct thread *td, struct vnode *vn,
582 char **retbuf, char **freebuf);
583 int vn_fullpath_global(struct thread *td, struct vnode *vn,
584 char **retbuf, char **freebuf);
585 int vn_commname(struct vnode *vn, char *buf, u_int buflen);
586 int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid,
587 gid_t file_gid, mode_t acc_mode, struct ucred *cred,
589 int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
590 gid_t file_gid, struct acl *acl, mode_t acc_mode,
591 struct ucred *cred, int *privused);
592 void vattr_null(struct vattr *vap);
593 int vcount(struct vnode *vp);
594 void vdrop(struct vnode *);
595 void vdropl(struct vnode *);
596 int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
597 int vget(struct vnode *vp, int lockflag, struct thread *td);
598 void vgone(struct vnode *vp);
599 void vhold(struct vnode *);
600 void vholdl(struct vnode *);
601 int vinvalbuf(struct vnode *vp, int save, int slpflag, int slptimeo);
602 int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
603 off_t length, int blksize);
604 void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3);
605 #define vprint(label, vp) vn_printf((vp), "%s\n", (label))
606 int vrecycle(struct vnode *vp, struct thread *td);
607 int vn_close(struct vnode *vp,
608 int flags, struct ucred *file_cred, struct thread *td);
609 void vn_finished_write(struct mount *mp);
610 void vn_finished_secondary_write(struct mount *mp);
611 int vn_isdisk(struct vnode *vp, int *errp);
612 int _vn_lock(struct vnode *vp, int flags, char *file, int line);
613 #define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__)
614 int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp);
615 int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
616 struct ucred *cred, struct file *fp);
617 int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
618 int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base,
619 int len, off_t offset, enum uio_seg segflg, int ioflg,
620 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
622 int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base,
623 size_t len, off_t offset, enum uio_seg segflg, int ioflg,
624 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
626 int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
627 struct ucred *file_cred, struct thread *td);
628 int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
629 int vn_start_secondary_write(struct vnode *vp, struct mount **mpp,
631 int vn_writechk(struct vnode *vp);
632 int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
633 const char *attrname, int *buflen, char *buf, struct thread *td);
634 int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
635 const char *attrname, int buflen, char *buf, struct thread *td);
636 int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
637 const char *attrname, struct thread *td);
638 int vfs_cache_lookup(struct vop_lookup_args *ap);
639 void vfs_timestamp(struct timespec *);
640 void vfs_write_resume(struct mount *mp);
641 int vfs_write_suspend(struct mount *mp);
642 int vop_stdbmap(struct vop_bmap_args *);
643 int vop_stdfsync(struct vop_fsync_args *);
644 int vop_stdgetwritemount(struct vop_getwritemount_args *);
645 int vop_stdgetpages(struct vop_getpages_args *);
646 int vop_stdinactive(struct vop_inactive_args *);
647 int vop_stdislocked(struct vop_islocked_args *);
648 int vop_stdkqfilter(struct vop_kqfilter_args *);
649 int vop_stdlock(struct vop_lock1_args *);
650 int vop_stdputpages(struct vop_putpages_args *);
651 int vop_stdunlock(struct vop_unlock_args *);
652 int vop_nopoll(struct vop_poll_args *);
653 int vop_stdadvlock(struct vop_advlock_args *ap);
654 int vop_stdadvlockasync(struct vop_advlockasync_args *ap);
655 int vop_stdpathconf(struct vop_pathconf_args *);
656 int vop_stdpoll(struct vop_poll_args *);
657 int vop_stdvptofh(struct vop_vptofh_args *ap);
658 int vop_eopnotsupp(struct vop_generic_args *ap);
659 int vop_ebadf(struct vop_generic_args *ap);
660 int vop_einval(struct vop_generic_args *ap);
661 int vop_enotty(struct vop_generic_args *ap);
662 int vop_null(struct vop_generic_args *ap);
663 int vop_panic(struct vop_generic_args *ap);
665 /* These are called from within the actual VOPS. */
666 void vop_create_post(void *a, int rc);
667 void vop_link_post(void *a, int rc);
668 void vop_lock_pre(void *a);
669 void vop_lock_post(void *a, int rc);
670 void vop_lookup_post(void *a, int rc);
671 void vop_lookup_pre(void *a);
672 void vop_mkdir_post(void *a, int rc);
673 void vop_mknod_post(void *a, int rc);
674 void vop_remove_post(void *a, int rc);
675 void vop_rename_post(void *a, int rc);
676 void vop_rename_pre(void *a);
677 void vop_rmdir_post(void *a, int rc);
678 void vop_setattr_post(void *a, int rc);
679 void vop_strategy_pre(void *a);
680 void vop_symlink_post(void *a, int rc);
681 void vop_unlock_post(void *a, int rc);
682 void vop_unlock_pre(void *a);
684 #define VOP_WRITE_PRE(ap) \
686 int error, osize, ooffset, noffset; \
688 osize = ooffset = noffset = 0; \
689 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \
690 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred); \
693 ooffset = (ap)->a_uio->uio_offset; \
694 osize = va.va_size; \
697 #define VOP_WRITE_POST(ap, ret) \
698 noffset = (ap)->a_uio->uio_offset; \
699 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \
700 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \
701 | (noffset > osize ? NOTE_EXTEND : 0)); \
704 #define VOP_LOCK(vp, flags) VOP_LOCK1(vp, flags, __FILE__, __LINE__)
707 void vput(struct vnode *vp);
708 void vrele(struct vnode *vp);
709 void vref(struct vnode *vp);
710 int vrefcnt(struct vnode *vp);
711 void v_addpollinfo(struct vnode *vp);
713 int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td);
714 void vnode_destroy_vobject(struct vnode *vp);
716 extern struct vop_vector fifo_specops;
717 extern struct vop_vector dead_vnodeops;
718 extern struct vop_vector default_vnodeops;
720 #define VOP_PANIC ((void*)(uintptr_t)vop_panic)
721 #define VOP_NULL ((void*)(uintptr_t)vop_null)
722 #define VOP_EBADF ((void*)(uintptr_t)vop_ebadf)
723 #define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty)
724 #define VOP_EINVAL ((void*)(uintptr_t)vop_einval)
725 #define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp)
728 typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg);
730 int 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);
731 int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg);
732 void vfs_hash_rehash(struct vnode *vp, u_int hash);
733 void vfs_hash_remove(struct vnode *vp);
735 int vfs_kqfilter(struct vop_kqfilter_args *);
736 void vfs_mark_atime(struct vnode *vp, struct ucred *cred);
738 int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off);
742 #endif /* !_SYS_VNODE_H_ */