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: src/sys/sys/vnode.h,v 1.243.2.3 2005/03/01 11:32:32 phk Exp $
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/queue.h>
43 #include <sys/_lock.h>
44 #include <sys/lock.h>
45 #include <sys/_mutex.h>
46 #include <sys/mutex.h>
47 #include <sys/selinfo.h>
48 #include <sys/uio.h>
49 #include <sys/acl.h>
50 #include <sys/ktr.h>
51
52 /*
53 * The vnode is the focus of all file activity in UNIX. There is a
54 * unique vnode allocated for each active file, each current directory,
55 * each mounted-on file, text file, and the root.
56 */
57
58 /*
59 * Vnode types. VNON means no type.
60 */
61 enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
62
63 /*
64 * Each underlying filesystem allocates its own private area and hangs
65 * it from v_data. If non-null, this area is freed in getnewvnode().
66 */
67 TAILQ_HEAD(buflists, buf);
68
69 typedef int vop_t(void *);
70 struct namecache;
71
72 struct vpollinfo {
73 struct mtx vpi_lock; /* lock to protect below */
74 struct selinfo vpi_selinfo; /* identity of poller(s) */
75 short vpi_events; /* what they are looking for */
76 short vpi_revents; /* what has happened */
77 };
78
79 /*
80 * Reading or writing any of these items requires holding the appropriate lock.
81 *
82 * Lock reference:
83 * c - namecache mutex
84 * f - freelist mutex
85 * G - Giant
86 * i - interlock
87 * m - mntvnodes mutex
88 * p - pollinfo lock
89 * s - spechash mutex
90 * S - syncer mutex
91 * u - Only a reference to the vnode is needed to read.
92 * v - vnode lock
93 *
94 * Vnodes may be found on many lists. The general way to deal with operating
95 * on a vnode that is on a list is:
96 * 1) Lock the list and find the vnode.
97 * 2) Lock interlock so that the vnode does not go away.
98 * 3) Unlock the list to avoid lock order reversals.
99 * 4) vget with LK_INTERLOCK and check for ENOENT, or
100 * 5) Check for XLOCK if the vnode lock is not required.
101 * 6) Perform your operation, then vput().
102 *
103 * XXX Not all fields are locked yet and some fields that are marked are not
104 * locked consistently. This is a work in progress. Requires Giant!
105 */
106
107 struct vnode {
108 struct mtx v_interlock; /* lock for "i" things */
109 u_long v_iflag; /* i vnode flags (see below) */
110 int v_usecount; /* i ref count of users */
111 long v_numoutput; /* i writes in progress */
112 struct thread *v_vxthread; /* i thread owning VXLOCK */
113 int v_holdcnt; /* i page & buffer references */
114 struct buflists v_cleanblkhd; /* i SORTED clean blocklist */
115 struct buf *v_cleanblkroot; /* i clean buf splay tree */
116 int v_cleanbufcnt; /* i number of clean buffers */
117 struct buflists v_dirtyblkhd; /* i SORTED dirty blocklist */
118 struct buf *v_dirtyblkroot; /* i dirty buf splay tree */
119 int v_dirtybufcnt; /* i number of dirty buffers */
120 u_long v_vflag; /* v vnode flags */
121 int v_writecount; /* v ref count of writers */
122 struct vm_object *v_object; /* v Place to store VM object */
123 daddr_t v_lastw; /* v last write (write cluster) */
124 daddr_t v_cstart; /* v start block of cluster */
125 daddr_t v_lasta; /* v last allocation (cluster) */
126 int v_clen; /* v length of current cluster */
127 union {
128 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */
129 struct socket *vu_socket; /* v unix ipc (VSOCK) */
130 struct {
131 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */
132 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */
133 } vu_spec;
134 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */
135 } v_un;
136 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */
137 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */
138 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */
139 enum vtype v_type; /* u vnode type */
140 const char *v_tag; /* u type of underlying data */
141 void *v_data; /* u private data for fs */
142 struct lock v_lock; /* u used if fs don't have one */
143 struct lock *v_vnlock; /* u pointer to vnode lock */
144 vop_t **v_op; /* u vnode operations vector */
145 struct mount *v_mount; /* u ptr to vfs we are in */
146 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */
147 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */
148 u_long v_id; /* c capability identifier */
149 struct vnode *v_dd; /* c .. vnode */
150 u_long v_ddid; /* c .. capability identifier */
151 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */
152 struct label *v_label; /* MAC label for vnode */
153 #ifdef DEBUG_LOCKS
154 const char *filename; /* Source file doing locking */
155 int line; /* Line number doing locking */
156 #endif
157 dev_t v_cachedfs; /* cached fs id */
158 ino_t v_cachedid; /* cached file id */
159 int v_bsize; /* block size for I/O */
160 };
161 #define v_mountedhere v_un.vu_mountedhere
162 #define v_socket v_un.vu_socket
163 #define v_rdev v_un.vu_spec.vu_cdev
164 #define v_specnext v_un.vu_spec.vu_specnext
165 #define v_fifoinfo v_un.vu_fifoinfo
166
167 /*
168 * Userland version of struct vnode, for sysctl.
169 */
170 struct xvnode {
171 size_t xv_size; /* sizeof(struct xvnode) */
172 void *xv_vnode; /* address of real vnode */
173 u_long xv_flag; /* vnode vflags */
174 int xv_usecount; /* reference count of users */
175 int xv_writecount; /* reference count of writers */
176 int xv_holdcnt; /* page & buffer references */
177 u_long xv_id; /* capability identifier */
178 void *xv_mount; /* address of parent mount */
179 long xv_numoutput; /* num of writes in progress */
180 enum vtype xv_type; /* vnode type */
181 union {
182 void *xvu_socket; /* socket, if VSOCK */
183 void *xvu_fifo; /* fifo, if VFIFO */
184 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */
185 struct {
186 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */
187 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */
188 } xv_uns;
189 } xv_un;
190 };
191 #define xv_socket xv_un.xvu_socket
192 #define xv_fifo xv_un.xvu_fifo
193 #define xv_rdev xv_un.xvu_rdev
194 #define xv_dev xv_un.xv_uns.xvu_dev
195 #define xv_ino xv_un.xv_uns.xvu_ino
196
197 #define VN_POLLEVENT(vp, events) \
198 do { \
199 if ((vp)->v_pollinfo != NULL && \
200 (vp)->v_pollinfo->vpi_events & (events)) \
201 vn_pollevent((vp), (events)); \
202 } while (0)
203
204 #define VN_KNOTE(vp, b, a) \
205 do { \
206 if ((vp)->v_pollinfo != NULL) \
207 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \
208 } while (0)
209 #define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1)
210 #define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0)
211
212 /*
213 * Vnode flags.
214 * VI flags are protected by interlock and live in v_iflag
215 * VV flags are protected by the vnode lock and live in v_vflag
216 */
217 #define VI_XLOCK 0x0001 /* vnode is locked to change vtype */
218 #define VI_XWANT 0x0002 /* thread is waiting for vnode */
219 #define VI_BWAIT 0x0004 /* waiting for output to complete */
220 #define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */
221 #define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */
222 #define VI_MOUNT 0x0020 /* Mount in progress */
223 #define VI_AGE 0x0040 /* Insert vnode at head of free list */
224 #define VI_DOOMED 0x0080 /* This vnode is being recycled */
225 #define VI_FREE 0x0100 /* This vnode is on the freelist */
226 #define VI_OBJDIRTY 0x0400 /* object might be dirty */
227 #define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */
228 /*
229 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements
230 * in v_synclist.
231 */
232 #define VI_ONWORKLST 0x0200 /* On syncer work-list */
233
234 #define VV_ROOT 0x0001 /* root of its filesystem */
235 #define VV_ISTTY 0x0002 /* vnode represents a tty */
236 #define VV_NOSYNC 0x0004 /* unlinked, stop syncing */
237 #define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */
238 #define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */
239 #define VV_TEXT 0x0020 /* vnode is a pure text prototype */
240 #define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */
241 #define VV_SYSTEM 0x0080 /* vnode being used by kernel */
242 #define VV_PROCDEP 0x0100 /* vnode is process dependent */
243
244 /*
245 * Vnode attributes. A field value of VNOVAL represents a field whose value
246 * is unavailable (getattr) or which is not to be changed (setattr).
247 */
248 struct vattr {
249 enum vtype va_type; /* vnode type (for create) */
250 u_short va_mode; /* files access mode and type */
251 short va_nlink; /* number of references to file */
252 uid_t va_uid; /* owner user id */
253 gid_t va_gid; /* owner group id */
254 dev_t va_fsid; /* filesystem id */
255 long va_fileid; /* file id */
256 u_quad_t va_size; /* file size in bytes */
257 long va_blocksize; /* blocksize preferred for i/o */
258 struct timespec va_atime; /* time of last access */
259 struct timespec va_mtime; /* time of last modification */
260 struct timespec va_ctime; /* time file changed */
261 struct timespec va_birthtime; /* time file created */
262 u_long va_gen; /* generation number of file */
263 u_long va_flags; /* flags defined for file */
264 dev_t va_rdev; /* device the special file represents */
265 u_quad_t va_bytes; /* bytes of disk space held by file */
266 u_quad_t va_filerev; /* file modification number */
267 u_int va_vaflags; /* operations flags, see below */
268 long va_spare; /* remain quad aligned */
269 };
270
271 /*
272 * Flags for va_vaflags.
273 */
274 #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
275 #define VA_EXCLUSIVE 0x02 /* exclusive create request */
276
277 /*
278 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
279 * help with write clustering)
280 */
281 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
282 #define IO_APPEND 0x0002 /* append write to end */
283 #define IO_SYNC 0x0004 /* do I/O synchronously */
284 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
285 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
286 #define IO_VMIO 0x0020 /* data already in VMIO space */
287 #define IO_INVAL 0x0040 /* invalidate after I/O */
288 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
289 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
290 #define IO_EXT 0x0400 /* operate on external attributes */
291 #define IO_NORMAL 0x0800 /* operate on regular data */
292 #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
293
294 #define IO_SEQMAX 0x7F /* seq heuristic max value */
295 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
296
297 /*
298 * Modes. Some values same as Ixxx entries from inode.h for now.
299 */
300 #define VEXEC 000100 /* execute/search permission */
301 #define VWRITE 000200 /* write permission */
302 #define VREAD 000400 /* read permission */
303 #define VSVTX 001000 /* save swapped text even after use */
304 #define VSGID 002000 /* set group id on execution */
305 #define VSUID 004000 /* set user id on execution */
306 #define VADMIN 010000 /* permission to administer */
307 #define VSTAT 020000 /* permission to retrieve attrs */
308 #define VAPPEND 040000 /* permission to write/append */
309 #define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
310
311 /*
312 * Token indicating no attribute value yet assigned.
313 */
314 #define VNOVAL (-1)
315
316 /*
317 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
318 */
319 #define VLKTIMEOUT (hz / 20 + 1)
320
321 #ifdef _KERNEL
322
323 #ifdef MALLOC_DECLARE
324 MALLOC_DECLARE(M_VNODE);
325 #endif
326
327 /*
328 * Convert between vnode types and inode formats (since POSIX.1
329 * defines mode word of stat structure in terms of inode formats).
330 */
331 extern enum vtype iftovt_tab[];
332 extern int vttoif_tab[];
333 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
334 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
335 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
336
337 /*
338 * Flags to various vnode functions.
339 */
340 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
341 #define FORCECLOSE 0x0002 /* vflush: force file closure */
342 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
343 #define DOCLOSE 0x0008 /* vclean: close active files */
344 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
345 #define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */
346 #define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */
347 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
348 #define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */
349 #define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */
350 #define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */
351
352 #define VREF(vp) vref(vp)
353
354 #ifdef DIAGNOSTIC
355 #define VATTR_NULL(vap) vattr_null(vap)
356 #else
357 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
358 #endif /* DIAGNOSTIC */
359
360 #define NULLVP ((struct vnode *)NULL)
361
362 #define VNODEOP_SET(f) \
363 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \
364 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f);
365
366 /*
367 * Global vnode data.
368 */
369 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
370 extern int async_io_version; /* 0 or POSIX version of AIO i'face */
371 extern int desiredvnodes; /* number of vnodes desired */
372 extern struct uma_zone *namei_zone;
373 extern int prtactive; /* nonzero to call vprint() */
374 extern struct vattr va_null; /* predefined null vattr structure */
375
376 /*
377 * Macro/function to check for client cache inconsistency w.r.t. leasing.
378 */
379 #define LEASE_READ 0x1 /* Check lease for readers */
380 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
381
382 extern void (*lease_updatetime)(int deltat);
383
384 /* Requires interlock. */
385 #define VSHOULDFREE(vp) \
386 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \
387 !(vp)->v_holdcnt && !(vp)->v_usecount && \
388 (!(vp)->v_object || \
389 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
390
391 /* Requires interlock. */
392 #define VMIGHTFREE(vp) \
393 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \
394 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
395
396 /* Requires interlock. */
397 #define VSHOULDBUSY(vp) \
398 (((vp)->v_iflag & VI_FREE) && \
399 ((vp)->v_holdcnt || (vp)->v_usecount))
400
401 #define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock)
402 #define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock)
403 #define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock)
404 #define VI_MTX(vp) (&(vp)->v_interlock)
405
406 #endif /* _KERNEL */
407
408 /*
409 * Mods for extensibility.
410 */
411
412 /*
413 * Flags for vdesc_flags:
414 */
415 #define VDESC_MAX_VPS 16
416 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
417 #define VDESC_VP0_WILLRELE 0x0001
418 #define VDESC_VP1_WILLRELE 0x0002
419 #define VDESC_VP2_WILLRELE 0x0004
420 #define VDESC_VP3_WILLRELE 0x0008
421 #define VDESC_NOMAP_VPP 0x0100
422 #define VDESC_VPP_WILLRELE 0x0200
423
424 /*
425 * VDESC_NO_OFFSET is used to identify the end of the offset list
426 * and in places where no such field exists.
427 */
428 #define VDESC_NO_OFFSET -1
429
430 /*
431 * This structure describes the vnode operation taking place.
432 */
433 struct vnodeop_desc {
434 int vdesc_offset; /* offset in vector,first for speed */
435 char *vdesc_name; /* a readable name for debugging */
436 int vdesc_flags; /* VDESC_* flags */
437
438 /*
439 * These ops are used by bypass routines to map and locate arguments.
440 * Creds and procs are not needed in bypass routines, but sometimes
441 * they are useful to (for example) transport layers.
442 * Nameidata is useful because it has a cred in it.
443 */
444 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
445 int vdesc_vpp_offset; /* return vpp location */
446 int vdesc_cred_offset; /* cred location, if any */
447 int vdesc_thread_offset; /* thread location, if any */
448 int vdesc_componentname_offset; /* if any */
449 /*
450 * Finally, we've got a list of private data (about each operation)
451 * for each transport layer. (Support to manage this list is not
452 * yet part of BSD.)
453 */
454 caddr_t *vdesc_transports;
455 };
456
457 #ifdef _KERNEL
458 /*
459 * A list of all the operation descs.
460 */
461 extern struct vnodeop_desc *vnodeop_descs[];
462
463 #define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field)
464 #define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \
465 ((s_type)(((char*)(struct_p)) + (s_offset)))
466
467 /*
468 * This structure is used to configure the new vnodeops vector.
469 */
470 struct vnodeopv_entry_desc {
471 struct vnodeop_desc *opve_op; /* which operation this is */
472 vop_t *opve_impl; /* code implementing this operation */
473 };
474 struct vnodeopv_desc {
475 /* ptr to the ptr to the vector where op should go */
476 vop_t ***opv_desc_vector_p;
477 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
478 };
479
480 /*
481 * A generic structure.
482 * This can be used by bypass routines to identify generic arguments.
483 */
484 struct vop_generic_args {
485 struct vnodeop_desc *a_desc;
486 /* other random data follows, presumably */
487 };
488
489 #ifdef DEBUG_VFS_LOCKS
490 /*
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.
496 */
497 void assert_vi_locked(struct vnode *vp, const char *str);
498 void assert_vi_unlocked(struct vnode *vp, const char *str);
499 #if 0
500 void assert_vop_elocked(struct vnode *vp, const char *str);
501 void assert_vop_elocked_other(struct vnode *vp, const char *str);
502 #endif
503 void assert_vop_locked(struct vnode *vp, const char *str);
504 #if 0
505 voi0 assert_vop_slocked(struct vnode *vp, const char *str);
506 #endif
507 void assert_vop_unlocked(struct vnode *vp, const char *str);
508
509 /* These are called from within the actual VOPS. */
510 void vop_lock_pre(void *a);
511 void vop_lock_post(void *a, int rc);
512 void vop_lookup_post(void *a, int rc);
513 void vop_lookup_pre(void *a);
514 void vop_rename_pre(void *a);
515 void vop_strategy_pre(void *a);
516 void vop_unlock_post(void *a, int rc);
517 void vop_unlock_pre(void *a);
518
519 #define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str))
520 #define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str))
521 #if 0
522 #define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str))
523 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
524 #endif
525 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str))
526 #if 0
527 #define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str))
528 #endif
529 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str))
530
531 #else /* !DEBUG_VFS_LOCKS */
532
533 #define ASSERT_VI_LOCKED(vp, str)
534 #define ASSERT_VI_UNLOCKED(vp, str)
535 #if 0
536 #define ASSERT_VOP_ELOCKED(vp, str)
537 #define ASSERT_VOP_ELOCKED_OTHER(vp, str)
538 #endif
539 #define ASSERT_VOP_LOCKED(vp, str)
540 #if 0
541 #define ASSERT_VOP_SLOCKED(vp, str)
542 #endif
543 #define ASSERT_VOP_UNLOCKED(vp, str)
544 #endif /* DEBUG_VFS_LOCKS */
545
546 /*
547 * VOCALL calls an op given an ops vector. We break it out because BSD's
548 * vclean changes the ops vector and then wants to call ops with the old
549 * vector.
550 */
551 #define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
552
553 /*
554 * This call works for vnodes in the kernel.
555 */
556 #define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
557 #define VDESC(OP) (& __CONCAT(OP,_desc))
558 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
559
560 /*
561 * VMIO support inline
562 */
563
564 extern int vmiodirenable;
565
566 static __inline int
567 vn_canvmio(struct vnode *vp)
568 {
569 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
570 return(TRUE);
571 return(FALSE);
572 }
573
574 /*
575 * Finally, include the default set of vnode operations.
576 */
577 #include "vnode_if.h"
578
579 /*
580 * Public vnode manipulation functions.
581 */
582 struct componentname;
583 struct file;
584 struct mount;
585 struct nameidata;
586 struct ostat;
587 struct thread;
588 struct proc;
589 struct stat;
590 struct nstat;
591 struct ucred;
592 struct uio;
593 struct vattr;
594 struct vnode;
595
596 extern int (*lease_check_hook)(struct vop_lease_args *);
597 extern int (*softdep_fsync_hook)(struct vnode *);
598 extern int (*softdep_process_worklist_hook)(struct mount *);
599
600 struct vnode *addaliasu(struct vnode *vp, dev_t nvp_rdev);
601 int bdevvp(struct cdev *dev, struct vnode **vpp);
602 /* cache_* may belong in namei.h. */
603 void cache_enter(struct vnode *dvp, struct vnode *vp,
604 struct componentname *cnp);
605 int cache_lookup(struct vnode *dvp, struct vnode **vpp,
606 struct componentname *cnp);
607 void cache_purge(struct vnode *vp);
608 void cache_purgevfs(struct mount *mp);
609 int cache_leaf_test(struct vnode *vp);
610 int change_dir(struct vnode *vp, struct thread *td);
611 int change_root(struct vnode *vp, struct thread *td);
612 void cvtstat(struct stat *st, struct ostat *ost);
613 void cvtnstat(struct stat *sb, struct nstat *nsb);
614 int getnewvnode(const char *tag, struct mount *mp, vop_t **vops,
615 struct vnode **vpp);
616 int lease_check(struct vop_lease_args *ap);
617 int spec_vnoperate(struct vop_generic_args *);
618 int speedup_syncer(void);
619 #define textvp_fullpath(p, rb, rfb) \
620 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
621 int vn_fullpath(struct thread *td, struct vnode *vn,
622 char **retbuf, char **freebuf);
623 int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid,
624 mode_t acc_mode, struct ucred *cred, int *privused);
625 int vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
626 gid_t file_gid, struct acl *acl, mode_t acc_mode,
627 struct ucred *cred, int *privused);
628 void vattr_null(struct vattr *vap);
629 int vcount(struct vnode *vp);
630 void vdrop(struct vnode *);
631 void vdropl(struct vnode *);
632 int vfinddev(struct cdev *dev, struct vnode **vpp);
633 void vfs_add_vnodeops(const void *);
634 void vfs_rm_vnodeops(const void *);
635 int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td);
636 int vget(struct vnode *vp, int lockflag, struct thread *td);
637 void vgone(struct vnode *vp);
638 void vgonel(struct vnode *vp, struct thread *td);
639 void vhold(struct vnode *);
640 void vholdl(struct vnode *);
641 int vinvalbuf(struct vnode *vp, int save, struct ucred *cred,
642 struct thread *td, int slpflag, int slptimeo);
643 int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
644 off_t length, int blksize);
645 void vprint(char *label, struct vnode *vp);
646 int vrecycle(struct vnode *vp, void *dummyarg, struct thread *td);
647 int vn_close(struct vnode *vp,
648 int flags, struct ucred *file_cred, struct thread *td);
649 void vn_finished_write(struct mount *mp);
650 int vn_isdisk(struct vnode *vp, int *errp);
651 int vn_lock(struct vnode *vp, int flags, struct thread *td);
652 #ifdef DEBUG_LOCKS
653 int debug_vn_lock(struct vnode *vp, int flags, struct thread *p,
654 const char *filename, int line);
655 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
656 #endif
657 int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx);
658 int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
659 struct ucred *cred, int fdidx);
660 void vn_pollevent(struct vnode *vp, int events);
661 void vn_pollgone(struct vnode *vp);
662 int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
663 int vn_rdwr(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_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base,
668 size_t len, off_t offset, enum uio_seg segflg, int ioflg,
669 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid,
670 struct thread *td);
671 int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
672 struct ucred *file_cred, struct thread *td);
673 int vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
674 struct cdev *vn_todev(struct vnode *vp);
675 int vn_write_suspend_wait(struct vnode *vp, struct mount *mp,
676 int flags);
677 int vn_writechk(struct vnode *vp);
678 int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
679 const char *attrname, int *buflen, char *buf, struct thread *td);
680 int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
681 const char *attrname, int buflen, char *buf, struct thread *td);
682 int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
683 const char *attrname, struct thread *td);
684 int vfs_cache_lookup(struct vop_lookup_args *ap);
685 int vfs_object_create(struct vnode *vp, struct thread *td,
686 struct ucred *cred);
687 void vfs_timestamp(struct timespec *);
688 void vfs_write_resume(struct mount *mp);
689 int vfs_write_suspend(struct mount *mp);
690 int vop_stdbmap(struct vop_bmap_args *);
691 int vop_stdfsync(struct vop_fsync_args *);
692 int vop_stdgetwritemount(struct vop_getwritemount_args *);
693 int vop_stdgetpages(struct vop_getpages_args *);
694 int vop_stdinactive(struct vop_inactive_args *);
695 int vop_stdislocked(struct vop_islocked_args *);
696 int vop_stdlock(struct vop_lock_args *);
697 int vop_stdputpages(struct vop_putpages_args *);
698 int vop_stdunlock(struct vop_unlock_args *);
699 int vop_nopoll(struct vop_poll_args *);
700 int vop_stdpathconf(struct vop_pathconf_args *);
701 int vop_stdpoll(struct vop_poll_args *);
702 int vop_revoke(struct vop_revoke_args *);
703 int vop_eopnotsupp(struct vop_generic_args *ap);
704 int vop_ebadf(struct vop_generic_args *ap);
705 int vop_einval(struct vop_generic_args *ap);
706 int vop_enotty(struct vop_generic_args *ap);
707 int vop_defaultop(struct vop_generic_args *ap);
708 int vop_null(struct vop_generic_args *ap);
709 int vop_panic(struct vop_generic_args *ap);
710 int vop_stdcreatevobject(struct vop_createvobject_args *ap);
711 int vop_stddestroyvobject(struct vop_destroyvobject_args *ap);
712 int vop_stdgetvobject(struct vop_getvobject_args *ap);
713
714 void vfree(struct vnode *);
715 void vput(struct vnode *vp);
716 void vrele(struct vnode *vp);
717 void vref(struct vnode *vp);
718 int vrefcnt(struct vnode *vp);
719 void vbusy(struct vnode *vp);
720 void v_addpollinfo(struct vnode *vp);
721
722 extern vop_t **default_vnodeop_p;
723 extern vop_t **spec_vnodeop_p;
724 extern vop_t **dead_vnodeop_p;
725
726 #endif /* _KERNEL */
727
728 #endif /* !_SYS_VNODE_H_ */
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