FreeBSD/Linux Kernel Cross Reference
sys/sys/vnode.h
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 * 4. 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: releng/6.0/sys/sys/vnode.h 150275 2005-09-18 07:10:57Z phk $
31 */
32
33 #ifndef _SYS_VNODE_H_
34 #define _SYS_VNODE_H_
35
36 /*
37 * XXX - compatability until lockmgr() goes away or all the #includes are
38 * updated.
39 */
40 #include <sys/lockmgr.h>
41
42 #include <sys/bufobj.h>
43 #include <sys/queue.h>
44 #include <sys/_lock.h>
45 #include <sys/lock.h>
46 #include <sys/_mutex.h>
47 #include <sys/mutex.h>
48 #include <sys/selinfo.h>
49 #include <sys/uio.h>
50 #include <sys/acl.h>
51 #include <sys/ktr.h>
52
53 /*
54 * The vnode is the focus of all file activity in UNIX. There is a
55 * unique vnode allocated for each active file, each current directory,
56 * each mounted-on file, text file, and the root.
57 */
58
59 /*
60 * Vnode types. VNON means no type.
61 */
62 enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
63
64 /*
65 * Each underlying filesystem allocates its own private area and hangs
66 * it from v_data. If non-null, this area is freed in getnewvnode().
67 */
68
69 struct namecache;
70
71 struct vpollinfo {
72 struct mtx vpi_lock; /* lock to protect below */
73 struct selinfo vpi_selinfo; /* identity of poller(s) */
74 short vpi_events; /* what they are looking for */
75 short vpi_revents; /* what has happened */
76 };
77
78 /*
79 * Reading or writing any of these items requires holding the appropriate lock.
80 *
81 * Lock reference:
82 * c - namecache mutex
83 * f - freelist mutex
84 * G - Giant
85 * i - interlock
86 * m - mntvnodes mutex
87 * p - pollinfo lock
88 * s - spechash mutex
89 * S - syncer mutex
90 * u - Only a reference to the vnode is needed to read.
91 * v - vnode lock
92 *
93 * Vnodes may be found on many lists. The general way to deal with operating
94 * on a vnode that is on a list is:
95 * 1) Lock the list and find the vnode.
96 * 2) Lock interlock so that the vnode does not go away.
97 * 3) Unlock the list to avoid lock order reversals.
98 * 4) vget with LK_INTERLOCK and check for ENOENT, or
99 * 5) Check for DOOMED if the vnode lock is not required.
100 * 6) Perform your operation, then vput().
101 *
102 * XXX Not all fields are locked yet and some fields that are marked are not
103 * locked consistently. This is a work in progress. Requires Giant!
104 */
105
106 #if defined(_KERNEL) || defined(_KVM_VNODE)
107
108 struct vnode {
109 /*
110 * Fields which define the identity of the vnode. These fields are
111 * owned by the filesystem (XXX: and vgone() ?)
112 */
113 enum vtype v_type; /* u vnode type */
114 const char *v_tag; /* u type of underlying data */
115 struct vop_vector *v_op; /* u vnode operations vector */
116 void *v_data; /* u private data for fs */
117
118 /*
119 * Filesystem instance stuff
120 */
121 struct mount *v_mount; /* u ptr to vfs we are in */
122 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
123
124 /*
125 * Type specific fields, only one applies to any given vnode.
126 * See #defines below for renaming to v_* namespace.
127 */
128 union {
129 struct mount *vu_mount; /* v ptr to mountpoint (VDIR) */
130 struct socket *vu_socket; /* v unix domain net (VSOCK) */
131 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
132 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
133 } v_un;
134
135 /*
136 * vfs_hash: (mount + inode) -> vnode hash.
137 */
138 LIST_ENTRY(vnode) v_hashlist;
139 u_int v_hash;
140
141 /*
142 * VFS_namecache stuff
143 */
144 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
145 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
146 struct vnode *v_dd; /* c .. vnode */
147
148 /*
149 * clustering stuff
150 */
151 daddr_t v_cstart; /* v start block of cluster */
152 daddr_t v_lasta; /* v last allocation */
153 daddr_t v_lastw; /* v last write */
154 int v_clen; /* v length of cur. cluster */
155
156 /*
157 * Locking
158 */
159 struct lock v_lock; /* u (if fs don't have one) */
160 struct mtx v_interlock; /* lock for "i" things */
161 struct lock *v_vnlock; /* u pointer to vnode lock */
162 #ifdef DEBUG_LOCKS
163 const char *filename; /* Source file doing locking */
164 int line; /* Line number doing locking */
165 #endif
166 int v_holdcnt; /* i prevents recycling. */
167 int v_usecount; /* i ref count of users */
168 u_long v_iflag; /* i vnode flags (see below) */
169 u_long v_vflag; /* v vnode flags */
170 int v_writecount; /* v ref count of writers */
171
172 /*
173 * The machinery of being a vnode
174 */
175 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
176 struct bufobj v_bufobj; /* * Buffer cache object */
177
178 /*
179 * Hooks for various subsystems and features.
180 */
181 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
182 struct label *v_label; /* MAC label for vnode */
183 };
184
185 #endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
186
187 #define v_mountedhere v_un.vu_mount
188 #define v_socket v_un.vu_socket
189 #define v_rdev v_un.vu_cdev
190 #define v_fifoinfo v_un.vu_fifoinfo
191
192 /* XXX: These are temporary to avoid a source sweep at this time */
193 #define v_object v_bufobj.bo_object
194
195 /*
196 * Userland version of struct vnode, for sysctl.
197 */
198 struct xvnode {
199 size_t xv_size; /* sizeof(struct xvnode) */
200 void *xv_vnode; /* address of real vnode */
201 u_long xv_flag; /* vnode vflags */
202 int xv_usecount; /* reference count of users */
203 int xv_writecount; /* reference count of writers */
204 int xv_holdcnt; /* page & buffer references */
205 u_long xv_id; /* capability identifier */
206 void *xv_mount; /* address of parent mount */
207 long xv_numoutput; /* num of writes in progress */
208 enum vtype xv_type; /* vnode type */
209 union {
210 void *xvu_socket; /* socket, if VSOCK */
211 void *xvu_fifo; /* fifo, if VFIFO */
212 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
213 struct {
214 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
215 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
216 } xv_uns;
217 } xv_un;
218 };
219 #define xv_socket xv_un.xvu_socket
220 #define xv_fifo xv_un.xvu_fifo
221 #define xv_rdev xv_un.xvu_rdev
222 #define xv_dev xv_un.xv_uns.xvu_dev
223 #define xv_ino xv_un.xv_uns.xvu_ino
224
225 /* We don't need to lock the knlist */
226 #define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \
227 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note))
228
229 #define VN_KNOTE(vp, b, a) \
230 do { \
231 if (!VN_KNLIST_EMPTY(vp)) \
232 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
233 } while (0)
234 #define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
235 #define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
236
237 /*
238 * Vnode flags.
239 * VI flags are protected by interlock and live in v_iflag
240 * VV flags are protected by the vnode lock and live in v_vflag
241 */
242 #define VI_MOUNT 0x0020 /* Mount in progress */
243 #define VI_AGE 0x0040 /* Insert vnode at head of free list */
244 #define VI_DOOMED 0x0080 /* This vnode is being recycled */
245 #define VI_FREE 0x0100 /* This vnode is on the freelist */
246 #define VI_OBJDIRTY 0x0400 /* object might be dirty */
247 #define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
248 #define VI_OWEINACT 0x1000 /* Need to call inactive */
249
250 #define VV_ROOT 0x0001 /* root of its filesystem */
251 #define VV_ISTTY 0x0002 /* vnode represents a tty */
252 #define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
253 #define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
254 #define VV_TEXT 0x0020 /* vnode is a pure text prototype */
255 #define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
256 #define VV_SYSTEM 0x0080 /* vnode being used by kernel */
257 #define VV_PROCDEP 0x0100 /* vnode is process dependent */
258 #define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */
259
260 /*
261 * Vnode attributes. A field value of VNOVAL represents a field whose value
262 * is unavailable (getattr) or which is not to be changed (setattr).
263 */
264 struct vattr {
265 enum vtype va_type; /* vnode type (for create) */
266 u_short va_mode; /* files access mode and type */
267 short va_nlink; /* number of references to file */
268 uid_t va_uid; /* owner user id */
269 gid_t va_gid; /* owner group id */
270 dev_t va_fsid; /* filesystem id */
271 long va_fileid; /* file id */
272 u_quad_t va_size; /* file size in bytes */
273 long va_blocksize; /* blocksize preferred for i/o */
274 struct timespec va_atime; /* time of last access */
275 struct timespec va_mtime; /* time of last modification */
276 struct timespec va_ctime; /* time file changed */
277 struct timespec va_birthtime; /* time file created */
278 u_long va_gen; /* generation number of file */
279 u_long va_flags; /* flags defined for file */
280 dev_t va_rdev; /* device the special file represents */
281 u_quad_t va_bytes; /* bytes of disk space held by file */
282 u_quad_t va_filerev; /* file modification number */
283 u_int va_vaflags; /* operations flags, see below */
284 long va_spare; /* remain quad aligned */
285 };
286
287 /*
288 * Flags for va_vaflags.
289 */
290 #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
291 #define VA_EXCLUSIVE 0x02 /* exclusive create request */
292 #define VA_EXECVE_ATIME 0x04 /* setting atime for execve */
293
294 /*
295 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
296 * help with write clustering)
297 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
298 */
299 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
300 #define IO_APPEND 0x0002 /* append write to end */
301 #define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
302 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
303 #define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
304 #define IO_VMIO 0x0020 /* data already in VMIO space */
305 #define IO_INVAL 0x0040 /* invalidate after I/O */
306 #define IO_SYNC 0x0080 /* do I/O synchronously */
307 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
308 #define IO_EXT 0x0400 /* operate on external attributes */
309 #define IO_NORMAL 0x0800 /* operate on regular data */
310 #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
311
312 #define IO_SEQMAX 0x7F /* seq heuristic max value */
313 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
314
315 /*
316 * Modes. Some values same as Ixxx entries from inode.h for now.
317 */
318 #define VEXEC 000100 /* execute/search permission */
319 #define VWRITE 000200 /* write permission */
320 #define VREAD 000400 /* read permission */
321 #define VSVTX 001000 /* save swapped text even after use */
322 #define VSGID 002000 /* set group id on execution */
323 #define VSUID 004000 /* set user id on execution */
324 #define VADMIN 010000 /* permission to administer */
325 #define VSTAT 020000 /* permission to retrieve attrs */
326 #define VAPPEND 040000 /* permission to write/append */
327 #define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
328
329 /*
330 * Token indicating no attribute value yet assigned.
331 */
332 #define VNOVAL (-1)
333
334 /*
335 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
336 */
337 #define VLKTIMEOUT (hz / 20 + 1)
338
339 #ifdef _KERNEL
340
341 #ifdef MALLOC_DECLARE
342 MALLOC_DECLARE(M_VNODE);
343 #endif
344
345 /*
346 * Convert between vnode types and inode formats (since POSIX.1
347 * defines mode word of stat structure in terms of inode formats).
348 */
349 extern enum vtype iftovt_tab[];
350 extern int vttoif_tab[];
351 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
352 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
353 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
354
355 /*
356 * Flags to various vnode functions.
357 */
358 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
359 #define FORCECLOSE 0x0002 /* vflush: force file closure */
360 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
361 #define DOCLOSE 0x0008 /* vclean: close active files */
362 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
363 #define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
364 #define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
365 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
366 #define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
367 #define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
368 #define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
369
370 #define VREF(vp) vref(vp)
371
372 #ifdef DIAGNOSTIC
373 #define VATTR_NULL(vap) vattr_null(vap)
374 #else
375 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
376 #endif /* DIAGNOSTIC */
377
378 #define NULLVP ((struct vnode *)NULL)
379
380 /*
381 * Global vnode data.
382 */
383 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
384 extern int async_io_version; /* 0 or POSIX version of AIO i'face */
385 extern int desiredvnodes; /* number of vnodes desired */
386 extern struct uma_zone *namei_zone;
387 extern int prtactive; /* nonzero to call vprint() */
388 extern struct vattr va_null; /* predefined null vattr structure */
389
390 /*
391 * Macro/function to check for client cache inconsistency w.r.t. leasing.
392 */
393 #define LEASE_READ 0x1 /* Check lease for readers */
394 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
395
396 extern void (*lease_updatetime)(int deltat);
397
398 #define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
399 #define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags))
400 #define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
401 #define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
402 #define VI_MTX(vp) (&(vp)->v_interlock)
403
404 #endif /* _KERNEL */
405
406 /*
407 * Mods for extensibility.
408 */
409
410 /*
411 * Flags for vdesc_flags:
412 */
413 #define VDESC_MAX_VPS 16
414 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
415 #define VDESC_VP0_WILLRELE 0x0001
416 #define VDESC_VP1_WILLRELE 0x0002
417 #define VDESC_VP2_WILLRELE 0x0004
418 #define VDESC_VP3_WILLRELE 0x0008
419 #define VDESC_NOMAP_VPP 0x0100
420 #define VDESC_VPP_WILLRELE 0x0200
421
422 /*
423 * A generic structure.
424 * This can be used by bypass routines to identify generic arguments.
425 */
426 struct vop_generic_args {
427 struct vnodeop_desc *a_desc;
428 /* other random data follows, presumably */
429 };
430
431 typedef int vop_bypass_t(struct vop_generic_args *);
432
433 /*
434 * VDESC_NO_OFFSET is used to identify the end of the offset list
435 * and in places where no such field exists.
436 */
437 #define VDESC_NO_OFFSET -1
438
439 /*
440 * This structure describes the vnode operation taking place.
441 */
442 struct vnodeop_desc {
443 char *vdesc_name; /* a readable name for debugging */
444 int vdesc_flags; /* VDESC_* flags */
445 vop_bypass_t *vdesc_call; /* Function to call */
446
447 /*
448 * These ops are used by bypass routines to map and locate arguments.
449 * Creds and procs are not needed in bypass routines, but sometimes
450 * they are useful to (for example) transport layers.
451 * Nameidata is useful because it has a cred in it.
452 */
453 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
454 int vdesc_vpp_offset; /* return vpp location */
455 int vdesc_cred_offset; /* cred location, if any */
456 int vdesc_thread_offset; /* thread location, if any */
457 int vdesc_componentname_offset; /* if any */
458 /*
459 * Finally, we've got a list of private data (about each operation)
460 * for each transport layer. (Support to manage this list is not
461 * yet part of BSD.)
462 */
463 caddr_t *vdesc_transports;
464 };
465
466 #ifdef _KERNEL
467 /*
468 * A list of all the operation descs.
469 */
470 extern struct vnodeop_desc *vnodeop_descs[];
471
472 #define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
473 #define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
474 ((s_type)(((char*)(struct_p)) + (s_offset)))
475
476
477 #ifdef DEBUG_VFS_LOCKS
478 /*
479 * Support code to aid in debugging VFS locking problems. Not totally
480 * reliable since if the thread sleeps between changing the lock
481 * state and checking it with the assert, some other thread could
482 * change the state. They are good enough for debugging a single
483 * filesystem using a single-threaded test.
484 */
485 void assert_vi_locked(struct vnode *vp, const char *str);
486 void assert_vi_unlocked(struct vnode *vp, const char *str);
487 void assert_vop_elocked(struct vnode *vp, const char *str);
488 #if 0
489 void assert_vop_elocked_other(struct vnode *vp, const char *str);
490 #endif
491 void assert_vop_locked(struct vnode *vp, const char *str);
492 #if 0
493 voi0 assert_vop_slocked(struct vnode *vp, const char *str);
494 #endif
495 void assert_vop_unlocked(struct vnode *vp, const char *str);
496
497 #define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
498 #define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
499 #define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
500 #if 0
501 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
502 #endif
503 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
504 #if 0
505 #define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
506 #endif
507 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
508
509 #else /* !DEBUG_VFS_LOCKS */
510
511 #define ASSERT_VI_LOCKED(vp, str)
512 #define ASSERT_VI_UNLOCKED(vp, str)
513 #define ASSERT_VOP_ELOCKED(vp, str)
514 #if 0
515 #define ASSERT_VOP_ELOCKED_OTHER(vp, str)
516 #endif
517 #define ASSERT_VOP_LOCKED(vp, str)
518 #if 0
519 #define ASSERT_VOP_SLOCKED(vp, str)
520 #endif
521 #define ASSERT_VOP_UNLOCKED(vp, str)
522 #endif /* DEBUG_VFS_LOCKS */
523
524
525 /*
526 * This call works for vnodes in the kernel.
527 */
528 #define VCALL(c) ((c)->a_desc->vdesc_call(c))
529
530 /*
531 * VMIO support inline
532 */
533
534 extern int vmiodirenable;
535
536 static __inline int
537 vn_canvmio(struct vnode *vp)
538 {
539 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
540 return(TRUE);
541 return(FALSE);
542 }
543
544 /*
545 * Finally, include the default set of vnode operations.
546 */
547 #include "vnode_if.h"
548
549 /*
550 * Public vnode manipulation functions.
551 */
552 struct componentname;
553 struct file;
554 struct mount;
555 struct nameidata;
556 struct ostat;
557 struct thread;
558 struct proc;
559 struct stat;
560 struct nstat;
561 struct ucred;
562 struct uio;
563 struct vattr;
564 struct vnode;
565
566 extern int (*lease_check_hook)(struct vop_lease_args *);
567 extern int (*softdep_process_worklist_hook)(struct mount *);
568
569 /* cache_* may belong in namei.h. */
570 void cache_enter(struct vnode *dvp, struct vnode *vp,
571 struct componentname *cnp);
572 int cache_lookup(struct vnode *dvp, struct vnode **vpp,
573 struct componentname *cnp);
574 void cache_purge(struct vnode *vp);
575 void cache_purgevfs(struct mount *mp);
576 int cache_leaf_test(struct vnode *vp);
577 int change_dir(struct vnode *vp, struct thread *td);
578 int change_root(struct vnode *vp, struct thread *td);
579 void cvtstat(struct stat *st, struct ostat *ost);
580 void cvtnstat(struct stat *sb, struct nstat *nsb);
581 int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
582 struct vnode **vpp);
583 u_quad_t init_va_filerev(void);
584 int lease_check(struct vop_lease_args *ap);
585 int speedup_syncer(void);
586 #define textvp_fullpath(p, rb, rfb) \
587 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
588 int vn_fullpath(struct thread *td, struct vnode *vn,
589 char **retbuf, char **freebuf);
590 int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid,
591 mode_t acc_mode, struct ucred *cred, int *privused);
592 int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
593 gid_t file_gid, struct acl *acl, mode_t acc_mode,
594 struct ucred *cred, int *privused);
595 void vattr_null(struct vattr *vap);
596 int vcount(struct vnode *vp);
597 void vdrop(struct vnode *);
598 void vfs_add_vnodeops(const void *);
599 void vfs_rm_vnodeops(const void *);
600 int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
601 int vget(struct vnode *vp, int lockflag, struct thread *td);
602 void vgone(struct vnode *vp);
603 void vhold(struct vnode *);
604 void vholdl(struct vnode *);
605 int vinvalbuf(struct vnode *vp, int save,
606 struct thread *td, int slpflag, int slptimeo);
607 int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
608 off_t length, int blksize);
609 void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3);
610 #define vprint(label, vp) vn_printf((vp), "%s\n", (label))
611 int vrecycle(struct vnode *vp, struct thread *td);
612 int vn_close(struct vnode *vp,
613 int flags, struct ucred *file_cred, struct thread *td);
614 void vn_finished_write(struct mount *mp);
615 int vn_isdisk(struct vnode *vp, int *errp);
616 int vn_lock(struct vnode *vp, int flags, struct thread *td);
617 #ifdef DEBUG_LOCKS
618 int debug_vn_lock(struct vnode *vp, int flags, struct thread *p,
619 const char *filename, int line);
620 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
621 #endif
622 int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx);
623 int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
624 struct ucred *cred, int fdidx);
625 int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
626 int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
627 int len, off_t offset, enum uio_seg segflg, int ioflg,
628 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
629 struct thread *td);
630 int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base,
631 size_t len, off_t offset, enum uio_seg segflg, int ioflg,
632 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
633 struct thread *td);
634 int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
635 struct ucred *file_cred, struct thread *td);
636 int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
637 int vn_write_suspend_wait(struct vnode *vp, struct mount *mp,
638 int flags);
639 int vn_writechk(struct vnode *vp);
640 int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
641 const char *attrname, int *buflen, char *buf, struct thread *td);
642 int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
643 const char *attrname, int buflen, char *buf, struct thread *td);
644 int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
645 const char *attrname, struct thread *td);
646 int vfs_cache_lookup(struct vop_lookup_args *ap);
647 void vfs_timestamp(struct timespec *);
648 void vfs_write_resume(struct mount *mp);
649 int vfs_write_suspend(struct mount *mp);
650 int vop_stdbmap(struct vop_bmap_args *);
651 int vop_stdfsync(struct vop_fsync_args *);
652 int vop_stdgetwritemount(struct vop_getwritemount_args *);
653 int vop_stdgetpages(struct vop_getpages_args *);
654 int vop_stdinactive(struct vop_inactive_args *);
655 int vop_stdislocked(struct vop_islocked_args *);
656 int vop_stdkqfilter(struct vop_kqfilter_args *);
657 int vop_stdlock(struct vop_lock_args *);
658 int vop_stdputpages(struct vop_putpages_args *);
659 int vop_stdunlock(struct vop_unlock_args *);
660 int vop_nopoll(struct vop_poll_args *);
661 int vop_stdpathconf(struct vop_pathconf_args *);
662 int vop_stdpoll(struct vop_poll_args *);
663 int vop_eopnotsupp(struct vop_generic_args *ap);
664 int vop_ebadf(struct vop_generic_args *ap);
665 int vop_einval(struct vop_generic_args *ap);
666 int vop_enotty(struct vop_generic_args *ap);
667 int vop_null(struct vop_generic_args *ap);
668 int vop_panic(struct vop_generic_args *ap);
669
670 /* These are called from within the actual VOPS. */
671 void vop_create_post(void *a, int rc);
672 void vop_link_post(void *a, int rc);
673 void vop_lock_pre(void *a);
674 void vop_lock_post(void *a, int rc);
675 void vop_lookup_post(void *a, int rc);
676 void vop_lookup_pre(void *a);
677 void vop_mkdir_post(void *a, int rc);
678 void vop_mknod_post(void *a, int rc);
679 void vop_remove_post(void *a, int rc);
680 void vop_rename_post(void *a, int rc);
681 void vop_rename_pre(void *a);
682 void vop_rmdir_post(void *a, int rc);
683 void vop_setattr_post(void *a, int rc);
684 void vop_strategy_pre(void *a);
685 void vop_symlink_post(void *a, int rc);
686 void vop_unlock_post(void *a, int rc);
687 void vop_unlock_pre(void *a);
688
689 #define VOP_WRITE_PRE(ap) \
690 struct vattr va; \
691 int error, osize, ooffset, noffset; \
692 \
693 osize = ooffset = noffset = 0; \
694 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \
695 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred, \
696 curthread); \
697 if (error) \
698 return (error); \
699 ooffset = (ap)->a_uio->uio_offset; \
700 osize = va.va_size; \
701 }
702
703 #define VOP_WRITE_POST(ap, ret) \
704 noffset = (ap)->a_uio->uio_offset; \
705 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \
706 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \
707 | (noffset > osize ? NOTE_EXTEND : 0)); \
708 }
709
710 void vput(struct vnode *vp);
711 void vrele(struct vnode *vp);
712 void vref(struct vnode *vp);
713 int vrefcnt(struct vnode *vp);
714 void v_addpollinfo(struct vnode *vp);
715
716 int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td);
717 void vnode_destroy_vobject(struct vnode *vp);
718
719 extern struct vop_vector fifo_specops;
720 extern struct vop_vector dead_vnodeops;
721 extern struct vop_vector default_vnodeops;
722
723 #define VOP_PANIC ((void*)(uintptr_t)vop_panic)
724 #define VOP_NULL ((void*)(uintptr_t)vop_null)
725 #define VOP_EBADF ((void*)(uintptr_t)vop_ebadf)
726 #define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty)
727 #define VOP_EINVAL ((void*)(uintptr_t)vop_einval)
728 #define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp)
729
730 /* vfs_hash.c */
731 typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg);
732
733 int vfs_hash_get(struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg);
734 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);
735 void vfs_hash_rehash(struct vnode *vp, u_int hash);
736 void vfs_hash_remove(struct vnode *vp);
737
738 int vfs_kqfilter(struct vop_kqfilter_args *);
739 struct dirent;
740 int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off);
741
742 #endif /* _KERNEL */
743
744 #endif /* !_SYS_VNODE_H_ */
Cache object: b70fc32ff13e3e9ea231458901a73c50
|