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 * 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: releng/5.0/sys/sys/vnode.h 106057 2002-10-27 18:07:41Z wollman $
35 */
36
37 #ifndef _SYS_VNODE_H_
38 #define _SYS_VNODE_H_
39
40 /*
41 * XXX - compatability until lockmgr() goes away or all the #includes are
42 * updated.
43 */
44 #include <sys/lockmgr.h>
45
46 #include <sys/queue.h>
47 #include <sys/_label.h>
48 #include <sys/_lock.h>
49 #include <sys/lock.h>
50 #include <sys/_mutex.h>
51 #include <sys/mutex.h>
52 #include <sys/selinfo.h>
53 #include <sys/uio.h>
54 #include <sys/acl.h>
55 #include <sys/ktr.h>
56
57 /*
58 * The vnode is the focus of all file activity in UNIX. There is a
59 * unique vnode allocated for each active file, each current directory,
60 * each mounted-on file, text file, and the root.
61 */
62
63 /*
64 * Vnode types. VNON means no type.
65 */
66 enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
67
68 /*
69 * Each underlying filesystem allocates its own private area and hangs
70 * it from v_data. If non-null, this area is freed in getnewvnode().
71 */
72 TAILQ_HEAD(buflists, buf);
73
74 typedef int vop_t(void *);
75 struct namecache;
76
77 struct vpollinfo {
78 struct mtx vpi_lock; /* lock to protect below */
79 struct selinfo vpi_selinfo; /* identity of poller(s) */
80 short vpi_events; /* what they are looking for */
81 short vpi_revents; /* what has happened */
82 };
83
84 /*
85 * Reading or writing any of these items requires holding the appropriate lock.
86 *
87 * Lock reference:
88 * c - namecache mutex
89 * f - freelist mutex
90 * i - interlock
91 * m - mntvnodes mutex
92 * p - pollinfo lock
93 * s - spechash mutex
94 * S - syncer mutex
95 * u - Only a reference to the vnode is needed to read.
96 * v - vnode lock
97 *
98 * XXX Not all fields are locked yet and some fields that are marked are not
99 * locked consistently. This is a work in progress.
100 */
101
102 struct vnode {
103 struct mtx v_interlock; /* lock for "i" things */
104 u_long v_iflag; /* i vnode flags (see below) */
105 int v_usecount; /* i ref count of users */
106 long v_numoutput; /* i writes in progress */
107 struct thread *v_vxproc; /* i thread owning VXLOCK */
108 int v_holdcnt; /* i page & buffer references */
109 struct buflists v_cleanblkhd; /* i SORTED clean blocklist */
110 struct buf *v_cleanblkroot; /* i clean buf splay tree */
111 struct buflists v_dirtyblkhd; /* i SORTED dirty blocklist */
112 struct buf *v_dirtyblkroot; /* i dirty buf splay tree */
113 u_long v_vflag; /* v vnode flags */
114 int v_writecount; /* v ref count of writers */
115 struct vm_object *v_object; /* v Place to store VM object */
116 daddr_t v_lastw; /* v last write (write cluster) */
117 daddr_t v_cstart; /* v start block of cluster */
118 daddr_t v_lasta; /* v last allocation (cluster) */
119 int v_clen; /* v length of current cluster */
120 union {
121 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */
122 struct socket *vu_socket; /* v unix ipc (VSOCK) */
123 struct {
124 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
125 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */
126 } vu_spec;
127 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
128 } v_un;
129 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
130 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
131 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */
132 enum vtype v_type; /* u vnode type */
133 const char *v_tag; /* u type of underlying data */
134 void *v_data; /* u private data for fs */
135 struct lock v_lock; /* u used if fs don't have one */
136 struct lock *v_vnlock; /* u pointer to vnode lock */
137 vop_t **v_op; /* u vnode operations vector */
138 struct mount *v_mount; /* u ptr to vfs we are in */
139 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
140 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
141 u_long v_id; /* c capability identifier */
142 struct vnode *v_dd; /* c .. vnode */
143 u_long v_ddid; /* c .. capability identifier */
144 struct vpollinfo *v_pollinfo; /* p Poll events */
145 struct label v_label; /* MAC label for vnode */
146 #ifdef DEBUG_LOCKS
147 const char *filename; /* Source file doing locking */
148 int line; /* Line number doing locking */
149 #endif
150 udev_t v_cachedfs; /* cached fs id */
151 ino_t v_cachedid; /* cached file id */
152 };
153 #define v_mountedhere v_un.vu_mountedhere
154 #define v_socket v_un.vu_socket
155 #define v_rdev v_un.vu_spec.vu_cdev
156 #define v_specnext v_un.vu_spec.vu_specnext
157 #define v_fifoinfo v_un.vu_fifoinfo
158
159 /*
160 * Userland version of struct vnode, for sysctl.
161 */
162 struct xvnode {
163 size_t xv_size; /* sizeof(struct xvnode) */
164 void *xv_vnode; /* address of real vnode */
165 u_long xv_flag; /* vnode vflags */
166 int xv_usecount; /* reference count of users */
167 int xv_writecount; /* reference count of writers */
168 int xv_holdcnt; /* page & buffer references */
169 u_long xv_id; /* capability identifier */
170 void *xv_mount; /* address of parent mount */
171 long xv_numoutput; /* num of writes in progress */
172 enum vtype xv_type; /* vnode type */
173 union {
174 void *xvu_socket; /* socket, if VSOCK */
175 void *xvu_fifo; /* fifo, if VFIFO */
176 udev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
177 struct {
178 udev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
179 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
180 } xv_uns;
181 } xv_un;
182 };
183 #define xv_socket xv_un.xvu_socket
184 #define xv_fifo xv_un.xvu_fifo
185 #define xv_rdev xv_un.xvu_rdev
186 #define xv_dev xv_un.xv_uns.xvu_dev
187 #define xv_ino xv_un.xv_uns.xvu_ino
188
189 #define VN_POLLEVENT(vp, events) \
190 do { \
191 if ((vp)->v_pollinfo != NULL && \
192 (vp)->v_pollinfo->vpi_events & (events)) \
193 vn_pollevent((vp), (events)); \
194 } while (0)
195
196 #define VN_KNOTE(vp, b) \
197 do { \
198 if ((vp)->v_pollinfo != NULL) \
199 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \
200 } while (0)
201
202 /*
203 * Vnode flags.
204 * VI flags are protected by interlock and live in v_iflag
205 * VV flags are protected by the vnode lock and live in v_vflag
206 */
207 #define VI_XLOCK 0x0001 /* vnode is locked to change vtype */
208 #define VI_XWANT 0x0002 /* thread is waiting for vnode */
209 #define VI_BWAIT 0x0004 /* waiting for output to complete */
210 #define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */
211 #define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */
212 #define VI_MOUNT 0x0020 /* Mount in progress */
213 #define VI_AGE 0x0040 /* Insert vnode at head of free list */
214 #define VI_DOOMED 0x0080 /* This vnode is being recycled */
215 #define VI_FREE 0x0100 /* This vnode is on the freelist */
216 #define VI_OBJDIRTY 0x0400 /* object might be dirty */
217 /*
218 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements
219 * in v_synclist.
220 */
221 #define VI_ONWORKLST 0x0200 /* On syncer work-list */
222
223 #define VV_ROOT 0x0001 /* root of its filesystem */
224 #define VV_ISTTY 0x0002 /* vnode represents a tty */
225 #define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
226 #define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */
227 #define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
228 #define VV_TEXT 0x0020 /* vnode is a pure text prototype */
229 #define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
230 #define VV_SYSTEM 0x0080 /* vnode being used by kernel */
231 #define VV_PROCDEP 0x0100 /* vnode is process dependent */
232
233 /*
234 * Vnode attributes. A field value of VNOVAL represents a field whose value
235 * is unavailable (getattr) or which is not to be changed (setattr).
236 */
237 struct vattr {
238 enum vtype va_type; /* vnode type (for create) */
239 u_short va_mode; /* files access mode and type */
240 short va_nlink; /* number of references to file */
241 uid_t va_uid; /* owner user id */
242 gid_t va_gid; /* owner group id */
243 udev_t va_fsid; /* filesystem id */
244 long va_fileid; /* file id */
245 u_quad_t va_size; /* file size in bytes */
246 long va_blocksize; /* blocksize preferred for i/o */
247 struct timespec va_atime; /* time of last access */
248 struct timespec va_mtime; /* time of last modification */
249 struct timespec va_ctime; /* time file changed */
250 struct timespec va_birthtime; /* time file created */
251 u_long va_gen; /* generation number of file */
252 u_long va_flags; /* flags defined for file */
253 udev_t va_rdev; /* device the special file represents */
254 u_quad_t va_bytes; /* bytes of disk space held by file */
255 u_quad_t va_filerev; /* file modification number */
256 u_int va_vaflags; /* operations flags, see below */
257 long va_spare; /* remain quad aligned */
258 };
259
260 /*
261 * Flags for va_vaflags.
262 */
263 #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
264 #define VA_EXCLUSIVE 0x02 /* exclusive create request */
265
266 /*
267 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
268 * help with write clustering)
269 */
270 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
271 #define IO_APPEND 0x0002 /* append write to end */
272 #define IO_SYNC 0x0004 /* do I/O synchronously */
273 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
274 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
275 #define IO_VMIO 0x0020 /* data already in VMIO space */
276 #define IO_INVAL 0x0040 /* invalidate after I/O */
277 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
278 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
279 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */
280 #define IO_EXT 0x0400 /* operate on external attributes */
281 #define IO_NORMAL 0x0800 /* operate on regular data */
282 #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
283
284 /*
285 * Modes. Some values same as Ixxx entries from inode.h for now.
286 */
287 #define VEXEC 000100 /* execute/search permission */
288 #define VWRITE 000200 /* write permission */
289 #define VREAD 000400 /* read permission */
290 #define VSVTX 001000 /* save swapped text even after use */
291 #define VSGID 002000 /* set group id on execution */
292 #define VSUID 004000 /* set user id on execution */
293 #define VADMIN 010000 /* permission to administer */
294 #define VSTAT 020000 /* permission to retrieve attrs */
295 #define VAPPEND 040000 /* permission to write/append */
296 #define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
297
298 /*
299 * Token indicating no attribute value yet assigned.
300 */
301 #define VNOVAL (-1)
302
303 /*
304 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
305 */
306 #define VLKTIMEOUT (hz / 20 + 1)
307
308 #ifdef _KERNEL
309
310 #ifdef MALLOC_DECLARE
311 MALLOC_DECLARE(M_VNODE);
312 #endif
313
314 /*
315 * Convert between vnode types and inode formats (since POSIX.1
316 * defines mode word of stat structure in terms of inode formats).
317 */
318 extern enum vtype iftovt_tab[];
319 extern int vttoif_tab[];
320 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
321 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
322 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
323
324 /*
325 * Flags to various vnode functions.
326 */
327 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
328 #define FORCECLOSE 0x0002 /* vflush: force file closure */
329 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
330 #define DOCLOSE 0x0008 /* vclean: close active files */
331 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
332 #define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
333 #define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
334 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
335 #define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
336 #define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
337 #define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
338
339 #define VREF(vp) vref(vp)
340
341
342 #ifdef DIAGNOSTIC
343 #define VATTR_NULL(vap) vattr_null(vap)
344 #else
345 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
346 #endif /* DIAGNOSTIC */
347
348 #define NULLVP ((struct vnode *)NULL)
349
350 #define VNODEOP_SET(f) \
351 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \
352 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f);
353
354 /*
355 * Global vnode data.
356 */
357 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
358 extern int async_io_version; /* 0 or POSIX version of AIO i'face */
359 extern int desiredvnodes; /* number of vnodes desired */
360 extern struct uma_zone *namei_zone;
361 extern int prtactive; /* nonzero to call vprint() */
362 extern struct vattr va_null; /* predefined null vattr structure */
363 extern int vfs_ioopt;
364
365 /*
366 * Macro/function to check for client cache inconsistency w.r.t. leasing.
367 */
368 #define LEASE_READ 0x1 /* Check lease for readers */
369 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
370
371
372 extern void (*lease_updatetime)(int deltat);
373
374 /* Requires interlock */
375 #define VSHOULDFREE(vp) \
376 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED)) && \
377 !(vp)->v_holdcnt && !(vp)->v_usecount && \
378 (!(vp)->v_object || \
379 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
380
381 /* Requires interlock */
382 #define VMIGHTFREE(vp) \
383 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK)) && \
384 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
385
386 /* Requires interlock */
387 #define VSHOULDBUSY(vp) \
388 (((vp)->v_iflag & VI_FREE) && \
389 ((vp)->v_holdcnt || (vp)->v_usecount))
390
391 #define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
392 #define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
393 #define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
394 #define VI_MTX(vp) (&(vp)->v_interlock)
395
396 #endif /* _KERNEL */
397
398
399 /*
400 * Mods for extensibility.
401 */
402
403 /*
404 * Flags for vdesc_flags:
405 */
406 #define VDESC_MAX_VPS 16
407 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
408 #define VDESC_VP0_WILLRELE 0x0001
409 #define VDESC_VP1_WILLRELE 0x0002
410 #define VDESC_VP2_WILLRELE 0x0004
411 #define VDESC_VP3_WILLRELE 0x0008
412 #define VDESC_NOMAP_VPP 0x0100
413 #define VDESC_VPP_WILLRELE 0x0200
414
415 /*
416 * VDESC_NO_OFFSET is used to identify the end of the offset list
417 * and in places where no such field exists.
418 */
419 #define VDESC_NO_OFFSET -1
420
421 /*
422 * This structure describes the vnode operation taking place.
423 */
424 struct vnodeop_desc {
425 int vdesc_offset; /* offset in vector,first for speed */
426 char *vdesc_name; /* a readable name for debugging */
427 int vdesc_flags; /* VDESC_* flags */
428
429 /*
430 * These ops are used by bypass routines to map and locate arguments.
431 * Creds and procs are not needed in bypass routines, but sometimes
432 * they are useful to (for example) transport layers.
433 * Nameidata is useful because it has a cred in it.
434 */
435 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
436 int vdesc_vpp_offset; /* return vpp location */
437 int vdesc_cred_offset; /* cred location, if any */
438 int vdesc_thread_offset; /* thread location, if any */
439 int vdesc_componentname_offset; /* if any */
440 /*
441 * Finally, we've got a list of private data (about each operation)
442 * for each transport layer. (Support to manage this list is not
443 * yet part of BSD.)
444 */
445 caddr_t *vdesc_transports;
446 };
447
448 #ifdef _KERNEL
449 /*
450 * A list of all the operation descs.
451 */
452 extern struct vnodeop_desc *vnodeop_descs[];
453
454 /*
455 * Interlock for scanning list of vnodes attached to a mountpoint
456 */
457 extern struct mtx mntvnode_mtx;
458
459 /*
460 * This macro is very helpful in defining those offsets in the vdesc struct.
461 *
462 * This is stolen from X11R4. I ignored all the fancy stuff for
463 * Crays, so if you decide to port this to such a serious machine,
464 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
465 */
466 #define VOPARG_OFFSET(p_type,field) \
467 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
468 #define VOPARG_OFFSETOF(s_type,field) \
469 VOPARG_OFFSET(s_type*,field)
470 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
471 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
472
473
474 /*
475 * This structure is used to configure the new vnodeops vector.
476 */
477 struct vnodeopv_entry_desc {
478 struct vnodeop_desc *opve_op; /* which operation this is */
479 vop_t *opve_impl; /* code implementing this operation */
480 };
481 struct vnodeopv_desc {
482 /* ptr to the ptr to the vector where op should go */
483 vop_t ***opv_desc_vector_p;
484 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
485 };
486
487 /*
488 * A generic structure.
489 * This can be used by bypass routines to identify generic arguments.
490 */
491 struct vop_generic_args {
492 struct vnodeop_desc *a_desc;
493 /* other random data follows, presumably */
494 };
495
496 /*
497 * Support code to aid in debugging VFS locking problems. Not totally
498 * reliable since if the thread sleeps between changing the lock
499 * state and checking it with the assert, some other thread could
500 * change the state. They are good enough for debugging a single
501 * filesystem using a single-threaded test.
502 */
503 void assert_vi_locked(struct vnode *vp, char *str);
504 void assert_vi_unlocked(struct vnode *vp, char *str);
505 void assert_vop_unlocked(struct vnode *vp, char *str);
506 void assert_vop_locked(struct vnode *vp, char *str);
507 void assert_vop_slocked(struct vnode *vp, char *str);
508 void assert_vop_elocked(struct vnode *vp, char *str);
509 void assert_vop_elocked_other(struct vnode *vp, char *str);
510
511 /* These are called from within the actuall VOPS */
512 void vop_rename_pre(void *a);
513 void vop_strategy_pre(void *a);
514 void vop_lookup_pre(void *a);
515 void vop_lookup_post(void *a, int rc);
516 void vop_lock_pre(void *a);
517 void vop_lock_post(void *a, int rc);
518 void vop_unlock_pre(void *a);
519 void vop_unlock_post(void *a, int rc);
520
521 #ifdef DEBUG_VFS_LOCKS
522
523 #define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
524 #define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
525 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
526 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
527 #define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
528 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
529 #define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
530
531 #else
532
533 #define ASSERT_VOP_LOCKED(vp, str)
534 #define ASSERT_VOP_UNLOCKED(vp, str)
535 #define ASSERT_VOP_ELOCKED(vp, str)
536 #define ASSERT_VOP_ELOCKED_OTHER(vp, str)
537 #define ASSERT_VOP_SLOCKED(vp, str)
538 #define ASSERT_VI_UNLOCKED(vp, str)
539 #define ASSERT_VI_LOCKED(vp, str)
540
541 #endif
542
543 /*
544 * VOCALL calls an op given an ops vector. We break it out because BSD's
545 * vclean changes the ops vector and then wants to call ops with the old
546 * vector.
547 */
548 #define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
549
550 /*
551 * This call works for vnodes in the kernel.
552 */
553 #define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
554 #define VDESC(OP) (& __CONCAT(OP,_desc))
555 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
556
557 /*
558 * VMIO support inline
559 */
560
561 extern int vmiodirenable;
562
563 static __inline int
564 vn_canvmio(struct vnode *vp)
565 {
566 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
567 return(TRUE);
568 return(FALSE);
569 }
570
571 /*
572 * Finally, include the default set of vnode operations.
573 */
574 #include "vnode_if.h"
575
576 /*
577 * Public vnode manipulation functions.
578 */
579 struct componentname;
580 struct file;
581 struct mount;
582 struct nameidata;
583 struct ostat;
584 struct thread;
585 struct proc;
586 struct stat;
587 struct nstat;
588 struct ucred;
589 struct uio;
590 struct vattr;
591 struct vnode;
592
593 extern int (*lease_check_hook)(struct vop_lease_args *);
594 extern int (*softdep_fsync_hook)(struct vnode *);
595 extern int (*softdep_process_worklist_hook)(struct mount *);
596
597 struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev);
598 int bdevvp(dev_t dev, struct vnode **vpp);
599 /* cache_* may belong in namei.h. */
600 void cache_enter(struct vnode *dvp, struct vnode *vp,
601 struct componentname *cnp);
602 int cache_lookup(struct vnode *dvp, struct vnode **vpp,
603 struct componentname *cnp);
604 void cache_purge(struct vnode *vp);
605 void cache_purgevfs(struct mount *mp);
606 int cache_leaf_test(struct vnode *vp);
607 void cvtstat(struct stat *st, struct ostat *ost);
608 void cvtnstat(struct stat *sb, struct nstat *nsb);
609 int getnewvnode(const char *tag, struct mount *mp, vop_t **vops,
610 struct vnode **vpp);
611 int lease_check(struct vop_lease_args *ap);
612 int spec_vnoperate(struct vop_generic_args *);
613 int speedup_syncer(void);
614 #define textvp_fullpath(p, rb, rfb) \
615 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
616 int vn_fullpath(struct thread *td, struct vnode *vn,
617 char **retbuf, char **freebuf);
618 int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid,
619 mode_t acc_mode, struct ucred *cred, int *privused);
620 int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
621 gid_t file_gid, struct acl *acl, mode_t acc_mode,
622 struct ucred *cred, int *privused);
623 void vattr_null(struct vattr *vap);
624 int vcount(struct vnode *vp);
625 void vdrop(struct vnode *);
626 void vdropl(struct vnode *);
627 int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp);
628 void vfs_add_vnodeops(const void *);
629 void vfs_rm_vnodeops(const void *);
630 int vflush(struct mount *mp, int rootrefs, int flags);
631 int vget(struct vnode *vp, int lockflag, struct thread *td);
632 void vgone(struct vnode *vp);
633 void vgonel(struct vnode *vp, struct thread *td);
634 void vhold(struct vnode *);
635 void vholdl(struct vnode *);
636 int vinvalbuf(struct vnode *vp, int save, struct ucred *cred,
637 struct thread *td, int slpflag, int slptimeo);
638 int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
639 off_t length, int blksize);
640 void vprint(char *label, struct vnode *vp);
641 int vrecycle(struct vnode *vp, struct mtx *inter_lkp,
642 struct thread *td);
643 int vn_close(struct vnode *vp,
644 int flags, struct ucred *file_cred, struct thread *td);
645 void vn_finished_write(struct mount *mp);
646 int vn_isdisk(struct vnode *vp, int *errp);
647 int vn_lock(struct vnode *vp, int flags, struct thread *td);
648 #ifdef DEBUG_LOCKS
649 int debug_vn_lock(struct vnode *vp, int flags, struct thread *p,
650 const char *filename, int line);
651 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
652 #endif
653 int vn_open(struct nameidata *ndp, int *flagp, int cmode);
654 int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
655 struct ucred *cred);
656 void vn_pollevent(struct vnode *vp, int events);
657 void vn_pollgone(struct vnode *vp);
658 int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
659 int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
660 int len, off_t offset, enum uio_seg segflg, int ioflg,
661 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
662 struct thread *td);
663 int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base,
664 int len, off_t offset, enum uio_seg segflg, int ioflg,
665 struct ucred *active_cred, struct ucred *file_cred, int *aresid,
666 struct thread *td);
667 int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
668 struct ucred *file_cred, struct thread *td);
669 int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
670 dev_t vn_todev(struct vnode *vp);
671 int vn_write_suspend_wait(struct vnode *vp, struct mount *mp,
672 int flags);
673 int vn_writechk(struct vnode *vp);
674 int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
675 const char *attrname, int *buflen, char *buf, struct thread *td);
676 int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
677 const char *attrname, int buflen, char *buf, struct thread *td);
678 int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
679 const char *attrname, struct thread *td);
680 int vfs_cache_lookup(struct vop_lookup_args *ap);
681 int vfs_object_create(struct vnode *vp, struct thread *td,
682 struct ucred *cred);
683 void vfs_timestamp(struct timespec *);
684 void vfs_write_resume(struct mount *mp);
685 int vfs_write_suspend(struct mount *mp);
686 int vop_stdbmap(struct vop_bmap_args *);
687 int vop_stdgetwritemount(struct vop_getwritemount_args *);
688 int vop_stdgetpages(struct vop_getpages_args *);
689 int vop_stdinactive(struct vop_inactive_args *);
690 int vop_stdislocked(struct vop_islocked_args *);
691 int vop_stdlock(struct vop_lock_args *);
692 int vop_stdputpages(struct vop_putpages_args *);
693 int vop_stdunlock(struct vop_unlock_args *);
694 int vop_noislocked(struct vop_islocked_args *);
695 int vop_nolock(struct vop_lock_args *);
696 int vop_nopoll(struct vop_poll_args *);
697 int vop_nounlock(struct vop_unlock_args *);
698 int vop_stdpathconf(struct vop_pathconf_args *);
699 int vop_stdpoll(struct vop_poll_args *);
700 int vop_revoke(struct vop_revoke_args *);
701 int vop_sharedlock(struct vop_lock_args *);
702 int vop_eopnotsupp(struct vop_generic_args *ap);
703 int vop_ebadf(struct vop_generic_args *ap);
704 int vop_einval(struct vop_generic_args *ap);
705 int vop_enotty(struct vop_generic_args *ap);
706 int vop_defaultop(struct vop_generic_args *ap);
707 int vop_null(struct vop_generic_args *ap);
708 int vop_panic(struct vop_generic_args *ap);
709 int vop_stdcreatevobject(struct vop_createvobject_args *ap);
710 int vop_stddestroyvobject(struct vop_destroyvobject_args *ap);
711 int vop_stdgetvobject(struct vop_getvobject_args *ap);
712
713 void vfree(struct vnode *);
714 void vput(struct vnode *vp);
715 void vrele(struct vnode *vp);
716 void vref(struct vnode *vp);
717 int vrefcnt(struct vnode *vp);
718 void vbusy(struct vnode *vp);
719 void v_addpollinfo(struct vnode *vp);
720
721 extern vop_t **default_vnodeop_p;
722 extern vop_t **spec_vnodeop_p;
723 extern vop_t **dead_vnodeop_p;
724
725 #endif /* _KERNEL */
726
727 #endif /* !_SYS_VNODE_H_ */
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