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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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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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) */
127 * vfs_hash: (mount + inode) -> vnode hash.
129 LIST_ENTRY(vnode) v_hashlist;
133 * VFS_namecache stuff
135 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
136 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
137 struct namecache *v_cache_dd; /* c Cache entry for .. vnode */
142 daddr_t v_cstart; /* v start block of cluster */
143 daddr_t v_lasta; /* v last allocation */
144 daddr_t v_lastw; /* v last write */
145 int v_clen; /* v length of cur. cluster */
150 struct lock v_lock; /* u (if fs don't have one) */
151 struct mtx v_interlock; /* lock for "i" things */
152 struct lock *v_vnlock; /* u pointer to vnode lock */
153 int v_holdcnt; /* i prevents recycling. */
154 int v_usecount; /* i ref count of users */
155 u_long v_iflag; /* i vnode flags (see below) */
156 u_long v_vflag; /* v vnode flags */
157 int v_writecount; /* v ref count of writers */
160 * The machinery of being a vnode
162 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
163 struct bufobj v_bufobj; /* * Buffer cache object */
166 * Hooks for various subsystems and features.
168 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
169 struct label *v_label; /* MAC label for vnode */
170 struct lockf *v_lockf; /* Byte-level lock list */
173 #endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
175 #define v_mountedhere v_un.vu_mount
176 #define v_socket v_un.vu_socket
177 #define v_rdev v_un.vu_cdev
178 #define v_fifoinfo v_un.vu_fifoinfo
180 /* XXX: These are temporary to avoid a source sweep at this time */
181 #define v_object v_bufobj.bo_object
184 * Userland version of struct vnode, for sysctl.
187 size_t xv_size; /* sizeof(struct xvnode) */
188 void *xv_vnode; /* address of real vnode */
189 u_long xv_flag; /* vnode vflags */
190 int xv_usecount; /* reference count of users */
191 int xv_writecount; /* reference count of writers */
192 int xv_holdcnt; /* page & buffer references */
193 u_long xv_id; /* capability identifier */
194 void *xv_mount; /* address of parent mount */
195 long xv_numoutput; /* num of writes in progress */
196 enum vtype xv_type; /* vnode type */
198 void *xvu_socket; /* socket, if VSOCK */
199 void *xvu_fifo; /* fifo, if VFIFO */
200 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
202 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
203 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
207 #define xv_socket xv_un.xvu_socket
208 #define xv_fifo xv_un.xvu_fifo
209 #define xv_rdev xv_un.xvu_rdev
210 #define xv_dev xv_un.xv_uns.xvu_dev
211 #define xv_ino xv_un.xv_uns.xvu_ino
213 /* We don't need to lock the knlist */
214 #define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \
215 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note))
217 #define VN_KNOTE(vp, b, a) \
219 if (!VN_KNLIST_EMPTY(vp)) \
220 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), \
221 (a) | KNF_NOKQLOCK); \
223 #define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, KNF_LISTLOCKED)
224 #define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
228 * VI flags are protected by interlock and live in v_iflag
229 * VV flags are protected by the vnode lock and live in v_vflag
231 * VI_DOOMED is doubly protected by the interlock and vnode lock. Both
232 * are required for writing but the status may be checked with either.
234 #define VI_MOUNT 0x0020 /* Mount in progress */
235 #define VI_AGE 0x0040 /* Insert vnode at head of free list */
236 #define VI_DOOMED 0x0080 /* This vnode is being recycled */
237 #define VI_FREE 0x0100 /* This vnode is on the freelist */
238 #define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
239 #define VI_OWEINACT 0x1000 /* Need to call inactive */
241 #define VV_ROOT 0x0001 /* root of its filesystem */
242 #define VV_ISTTY 0x0002 /* vnode represents a tty */
243 #define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
244 #define VV_ETERNALDEV 0x0008 /* device that is never destroyed */
245 #define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
246 #define VV_TEXT 0x0020 /* vnode is a pure text prototype */
247 #define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
248 #define VV_SYSTEM 0x0080 /* vnode being used by kernel */
249 #define VV_PROCDEP 0x0100 /* vnode is process dependent */
250 #define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */
251 #define VV_DELETED 0x0400 /* should be removed */
252 #define VV_MD 0x0800 /* vnode backs the md device */
253 #define VV_FORCEINSMQ 0x1000 /* force the insmntque to succeed */
256 * Vnode attributes. A field value of VNOVAL represents a field whose value
257 * is unavailable (getattr) or which is not to be changed (setattr).
260 enum vtype va_type; /* vnode type (for create) */
261 u_short va_mode; /* files access mode and type */
262 short va_nlink; /* number of references to file */
263 uid_t va_uid; /* owner user id */
264 gid_t va_gid; /* owner group id */
265 dev_t va_fsid; /* filesystem id */
266 long va_fileid; /* file id */
267 u_quad_t va_size; /* file size in bytes */
268 long va_blocksize; /* blocksize preferred for i/o */
269 struct timespec va_atime; /* time of last access */
270 struct timespec va_mtime; /* time of last modification */
271 struct timespec va_ctime; /* time file changed */
272 struct timespec va_birthtime; /* time file created */
273 u_long va_gen; /* generation number of file */
274 u_long va_flags; /* flags defined for file */
275 dev_t va_rdev; /* device the special file represents */
276 u_quad_t va_bytes; /* bytes of disk space held by file */
277 u_quad_t va_filerev; /* file modification number */
278 u_int va_vaflags; /* operations flags, see below */
279 long va_spare; /* remain quad aligned */
283 * Flags for va_vaflags.
285 #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
286 #define VA_EXCLUSIVE 0x02 /* exclusive create request */
289 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
290 * help with write clustering)
291 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
293 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
294 #define IO_APPEND 0x0002 /* append write to end */
295 #define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
296 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
297 #define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
298 #define IO_VMIO 0x0020 /* data already in VMIO space */
299 #define IO_INVAL 0x0040 /* invalidate after I/O */
300 #define IO_SYNC 0x0080 /* do I/O synchronously */
301 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
302 #define IO_EXT 0x0400 /* operate on external attributes */
303 #define IO_NORMAL 0x0800 /* operate on regular data */
304 #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
306 #define IO_SEQMAX 0x7F /* seq heuristic max value */
307 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
310 * Flags for accmode_t.
312 #define VEXEC 000000000100 /* execute/search permission */
313 #define VWRITE 000000000200 /* write permission */
314 #define VREAD 000000000400 /* read permission */
315 #define VADMIN 000000010000 /* being the file owner */
316 #define VAPPEND 000000040000 /* permission to write/append */
318 * VEXPLICIT_DENY makes VOP_ACCESSX(9) return EPERM or EACCES only
319 * if permission was denied explicitly, by a "deny" rule in NFSv4 ACL,
320 * and 0 otherwise. This never happens with ordinary unix access rights
321 * or POSIX.1e ACLs. Obviously, VEXPLICIT_DENY must be OR-ed with
322 * some other V* constant.
324 #define VEXPLICIT_DENY 000000100000
325 #define VREAD_NAMED_ATTRS 000000200000 /* not used */
326 #define VWRITE_NAMED_ATTRS 000000400000 /* not used */
327 #define VDELETE_CHILD 000001000000
328 #define VREAD_ATTRIBUTES 000002000000 /* permission to stat(2) */
329 #define VWRITE_ATTRIBUTES 000004000000 /* change {m,c,a}time */
330 #define VDELETE 000010000000
331 #define VREAD_ACL 000020000000 /* read ACL and file mode */
332 #define VWRITE_ACL 000040000000 /* change ACL and/or file mode */
333 #define VWRITE_OWNER 000100000000 /* change file owner */
334 #define VSYNCHRONIZE 000200000000 /* not used */
337 * Permissions that were traditionally granted only to the file owner.
339 #define VADMIN_PERMS (VADMIN | VWRITE_ATTRIBUTES | VWRITE_ACL | \
343 * Permissions that were traditionally granted to everyone.
345 #define VSTAT_PERMS (VREAD_ATTRIBUTES | VREAD_ACL)
348 * Permissions that allow to change the state of the file in any way.
350 #define VMODIFY_PERMS (VWRITE | VAPPEND | VADMIN_PERMS | VDELETE_CHILD | \
354 * Token indicating no attribute value yet assigned.
359 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
361 #define VLKTIMEOUT (hz / 20 + 1)
365 #ifdef MALLOC_DECLARE
366 MALLOC_DECLARE(M_VNODE);
370 * Convert between vnode types and inode formats (since POSIX.1
371 * defines mode word of stat structure in terms of inode formats).
373 extern enum vtype iftovt_tab[];
374 extern int vttoif_tab[];
375 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
376 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
377 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
380 * Flags to various vnode functions.
382 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
383 #define FORCECLOSE 0x0002 /* vflush: force file closure */
384 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
385 #define DOCLOSE 0x0008 /* vclean: close active files */
386 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
387 #define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
388 #define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
389 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
390 #define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
391 #define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
392 #define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
394 #define VREF(vp) vref(vp)
397 #define VATTR_NULL(vap) vattr_null(vap)
399 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
400 #endif /* DIAGNOSTIC */
402 #define NULLVP ((struct vnode *)NULL)
407 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
408 extern int async_io_version; /* 0 or POSIX version of AIO i'face */
409 extern int desiredvnodes; /* number of vnodes desired */
410 extern struct uma_zone *namei_zone;
411 extern struct vattr va_null; /* predefined null vattr structure */
413 #define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
414 #define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags))
415 #define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
416 #define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
417 #define VI_MTX(vp) (&(vp)->v_interlock)
419 #define VN_LOCK_AREC(vp) lockallowrecurse((vp)->v_vnlock)
420 #define VN_LOCK_ASHARE(vp) lockallowshare((vp)->v_vnlock)
425 * Mods for extensibility.
429 * Flags for vdesc_flags:
431 #define VDESC_MAX_VPS 16
432 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
433 #define VDESC_VP0_WILLRELE 0x0001
434 #define VDESC_VP1_WILLRELE 0x0002
435 #define VDESC_VP2_WILLRELE 0x0004
436 #define VDESC_VP3_WILLRELE 0x0008
437 #define VDESC_NOMAP_VPP 0x0100
438 #define VDESC_VPP_WILLRELE 0x0200
441 * A generic structure.
442 * This can be used by bypass routines to identify generic arguments.
444 struct vop_generic_args {
445 struct vnodeop_desc *a_desc;
446 /* other random data follows, presumably */
449 typedef int vop_bypass_t(struct vop_generic_args *);
452 * VDESC_NO_OFFSET is used to identify the end of the offset list
453 * and in places where no such field exists.
455 #define VDESC_NO_OFFSET -1
458 * This structure describes the vnode operation taking place.
460 struct vnodeop_desc {
461 char *vdesc_name; /* a readable name for debugging */
462 int vdesc_flags; /* VDESC_* flags */
463 vop_bypass_t *vdesc_call; /* Function to call */
466 * These ops are used by bypass routines to map and locate arguments.
467 * Creds and procs are not needed in bypass routines, but sometimes
468 * they are useful to (for example) transport layers.
469 * Nameidata is useful because it has a cred in it.
471 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
472 int vdesc_vpp_offset; /* return vpp location */
473 int vdesc_cred_offset; /* cred location, if any */
474 int vdesc_thread_offset; /* thread location, if any */
475 int vdesc_componentname_offset; /* if any */
480 * A list of all the operation descs.
482 extern struct vnodeop_desc *vnodeop_descs[];
484 #define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
485 #define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
486 ((s_type)(((char*)(struct_p)) + (s_offset)))
489 #ifdef DEBUG_VFS_LOCKS
491 * Support code to aid in debugging VFS locking problems. Not totally
492 * reliable since if the thread sleeps between changing the lock
493 * state and checking it with the assert, some other thread could
494 * change the state. They are good enough for debugging a single
495 * filesystem using a single-threaded test.
497 void assert_vi_locked(struct vnode *vp, const char *str);
498 void assert_vi_unlocked(struct vnode *vp, const char *str);
499 void assert_vop_elocked(struct vnode *vp, const char *str);
501 void assert_vop_elocked_other(struct vnode *vp, const char *str);
503 void assert_vop_locked(struct vnode *vp, const char *str);
505 voi0 assert_vop_slocked(struct vnode *vp, const char *str);
507 void assert_vop_unlocked(struct vnode *vp, const char *str);
509 #define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
510 #define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
511 #define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
513 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
515 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
517 #define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
519 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
521 #else /* !DEBUG_VFS_LOCKS */
523 #define ASSERT_VI_LOCKED(vp, str) ((void)0)
524 #define ASSERT_VI_UNLOCKED(vp, str) ((void)0)
525 #define ASSERT_VOP_ELOCKED(vp, str) ((void)0)
527 #define ASSERT_VOP_ELOCKED_OTHER(vp, str)
529 #define ASSERT_VOP_LOCKED(vp, str) ((void)0)
531 #define ASSERT_VOP_SLOCKED(vp, str)
533 #define ASSERT_VOP_UNLOCKED(vp, str) ((void)0)
534 #endif /* DEBUG_VFS_LOCKS */
538 * This call works for vnodes in the kernel.
540 #define VCALL(c) ((c)->a_desc->vdesc_call(c))
543 * VMIO support inline
546 extern int vmiodirenable;
549 vn_canvmio(struct vnode *vp)
551 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
557 * Finally, include the default set of vnode operations.
559 #include "vnode_if.h"
562 #define VN_OPEN_NOAUDIT 0x00000001
565 * Public vnode manipulation functions.
567 struct componentname;
581 /* cache_* may belong in namei.h. */
582 void cache_enter(struct vnode *dvp, struct vnode *vp,
583 struct componentname *cnp);
584 int cache_lookup(struct vnode *dvp, struct vnode **vpp,
585 struct componentname *cnp);
586 void cache_purge(struct vnode *vp);
587 void cache_purge_negative(struct vnode *vp);
588 void cache_purgevfs(struct mount *mp);
589 int change_dir(struct vnode *vp, struct thread *td);
590 int change_root(struct vnode *vp, struct thread *td);
591 void cvtstat(struct stat *st, struct ostat *ost);
592 void cvtnstat(struct stat *sb, struct nstat *nsb);
593 int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
595 int insmntque1(struct vnode *vp, struct mount *mp,
596 void (*dtr)(struct vnode *, void *), void *dtr_arg);
597 int insmntque(struct vnode *vp, struct mount *mp);
598 u_quad_t init_va_filerev(void);
599 int speedup_syncer(void);
600 int vn_vptocnp(struct vnode **vp, struct ucred *cred, char *buf,
602 #define textvp_fullpath(p, rb, rfb) \
603 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
604 int vn_fullpath(struct thread *td, struct vnode *vn,
605 char **retbuf, char **freebuf);
606 int vn_fullpath_global(struct thread *td, struct vnode *vn,
607 char **retbuf, char **freebuf);
608 int vn_commname(struct vnode *vn, char *buf, u_int buflen);
609 int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid,
610 gid_t file_gid, accmode_t accmode, struct ucred *cred,
612 int vaccess_acl_nfs4(enum vtype type, uid_t file_uid, gid_t file_gid,
613 struct acl *aclp, accmode_t accmode, struct ucred *cred,
615 int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
616 gid_t file_gid, struct acl *acl, accmode_t accmode,
617 struct ucred *cred, int *privused);
618 void vattr_null(struct vattr *vap);
619 int vcount(struct vnode *vp);
620 void vdrop(struct vnode *);
621 void vdropl(struct vnode *);
622 void vdestroy(struct vnode *);
623 int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
624 int vget(struct vnode *vp, int lockflag, struct thread *td);
625 void vgone(struct vnode *vp);
626 void vhold(struct vnode *);
627 void vholdl(struct vnode *);
628 int vinvalbuf(struct vnode *vp, int save, int slpflag, int slptimeo);
629 int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
630 off_t length, int blksize);
631 void vunref(struct vnode *);
632 void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3);
633 #define vprint(label, vp) vn_printf((vp), "%s\n", (label))
634 int vrecycle(struct vnode *vp, struct thread *td);
635 int vn_close(struct vnode *vp,
636 int flags, struct ucred *file_cred, struct thread *td);
637 void vn_finished_write(struct mount *mp);
638 void vn_finished_secondary_write(struct mount *mp);
639 int vn_isdisk(struct vnode *vp, int *errp);
640 int _vn_lock(struct vnode *vp, int flags, char *file, int line);
641 #define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__)
642 int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp);
643 int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
644 u_int vn_open_flags, struct ucred *cred, struct file *fp);
645 int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
646 int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base,
647 int len, off_t offset, enum uio_seg segflg, int ioflg,
648 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
650 int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base,
651 size_t len, off_t offset, enum uio_seg segflg, int ioflg,
652 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
654 int vn_rlimit_fsize(const struct vnode *vn, const struct uio *uio,
655 const struct thread *td);
656 int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
657 struct ucred *file_cred, struct thread *td);
658 int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
659 int vn_start_secondary_write(struct vnode *vp, struct mount **mpp,
661 int vn_writechk(struct vnode *vp);
662 int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
663 const char *attrname, int *buflen, char *buf, struct thread *td);
664 int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
665 const char *attrname, int buflen, char *buf, struct thread *td);
666 int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
667 const char *attrname, struct thread *td);
668 int vn_vget_ino(struct vnode *vp, ino_t ino, int lkflags,
672 int vfs_cache_lookup(struct vop_lookup_args *ap);
673 void vfs_timestamp(struct timespec *);
674 void vfs_write_resume(struct mount *mp);
675 int vfs_write_suspend(struct mount *mp);
676 int vop_stdbmap(struct vop_bmap_args *);
677 int vop_stdfsync(struct vop_fsync_args *);
678 int vop_stdgetwritemount(struct vop_getwritemount_args *);
679 int vop_stdgetpages(struct vop_getpages_args *);
680 int vop_stdinactive(struct vop_inactive_args *);
681 int vop_stdislocked(struct vop_islocked_args *);
682 int vop_stdkqfilter(struct vop_kqfilter_args *);
683 int vop_stdlock(struct vop_lock1_args *);
684 int vop_stdputpages(struct vop_putpages_args *);
685 int vop_stdunlock(struct vop_unlock_args *);
686 int vop_nopoll(struct vop_poll_args *);
687 int vop_stdaccess(struct vop_access_args *ap);
688 int vop_stdaccessx(struct vop_accessx_args *ap);
689 int vop_stdadvlock(struct vop_advlock_args *ap);
690 int vop_stdadvlockasync(struct vop_advlockasync_args *ap);
691 int vop_stdadvlockpurge(struct vop_advlockpurge_args *ap);
692 int vop_stdpathconf(struct vop_pathconf_args *);
693 int vop_stdpoll(struct vop_poll_args *);
694 int vop_stdvptocnp(struct vop_vptocnp_args *ap);
695 int vop_stdvptofh(struct vop_vptofh_args *ap);
696 int vop_eopnotsupp(struct vop_generic_args *ap);
697 int vop_ebadf(struct vop_generic_args *ap);
698 int vop_einval(struct vop_generic_args *ap);
699 int vop_enoent(struct vop_generic_args *ap);
700 int vop_enotty(struct vop_generic_args *ap);
701 int vop_null(struct vop_generic_args *ap);
702 int vop_panic(struct vop_generic_args *ap);
704 /* These are called from within the actual VOPS. */
705 void vop_create_post(void *a, int rc);
706 void vop_link_post(void *a, int rc);
707 void vop_lock_pre(void *a);
708 void vop_lock_post(void *a, int rc);
709 void vop_lookup_post(void *a, int rc);
710 void vop_lookup_pre(void *a);
711 void vop_mkdir_post(void *a, int rc);
712 void vop_mknod_post(void *a, int rc);
713 void vop_remove_post(void *a, int rc);
714 void vop_rename_post(void *a, int rc);
715 void vop_rename_pre(void *a);
716 void vop_rmdir_post(void *a, int rc);
717 void vop_setattr_post(void *a, int rc);
718 void vop_strategy_pre(void *a);
719 void vop_symlink_post(void *a, int rc);
720 void vop_unlock_post(void *a, int rc);
721 void vop_unlock_pre(void *a);
723 void vop_rename_fail(struct vop_rename_args *ap);
725 #define VOP_WRITE_PRE(ap) \
727 int error, osize, ooffset, noffset; \
729 osize = ooffset = noffset = 0; \
730 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \
731 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred); \
734 ooffset = (ap)->a_uio->uio_offset; \
735 osize = va.va_size; \
738 #define VOP_WRITE_POST(ap, ret) \
739 noffset = (ap)->a_uio->uio_offset; \
740 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \
741 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \
742 | (noffset > osize ? NOTE_EXTEND : 0)); \
745 #define VOP_LOCK(vp, flags) VOP_LOCK1(vp, flags, __FILE__, __LINE__)
748 void vput(struct vnode *vp);
749 void vrele(struct vnode *vp);
750 void vref(struct vnode *vp);
751 int vrefcnt(struct vnode *vp);
752 void v_addpollinfo(struct vnode *vp);
754 int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td);
755 void vnode_destroy_vobject(struct vnode *vp);
757 extern struct vop_vector fifo_specops;
758 extern struct vop_vector dead_vnodeops;
759 extern struct vop_vector default_vnodeops;
761 #define VOP_PANIC ((void*)(uintptr_t)vop_panic)
762 #define VOP_NULL ((void*)(uintptr_t)vop_null)
763 #define VOP_EBADF ((void*)(uintptr_t)vop_ebadf)
764 #define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty)
765 #define VOP_EINVAL ((void*)(uintptr_t)vop_einval)
766 #define VOP_ENOENT ((void*)(uintptr_t)vop_enoent)
767 #define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp)
770 typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg);
772 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);
773 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);
774 void vfs_hash_rehash(struct vnode *vp, u_int hash);
775 void vfs_hash_remove(struct vnode *vp);
777 int vfs_kqfilter(struct vop_kqfilter_args *);
778 void vfs_mark_atime(struct vnode *vp, struct ucred *cred);
780 int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off);
782 int vfs_unixify_accmode(accmode_t *accmode);
786 #endif /* !_SYS_VNODE_H_ */