1/*
2 * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29/*
30 * Copyright (c) 1989, 1993
31 * The Regents of the University of California. All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by the University of
44 * California, Berkeley and its contributors.
45 * 4. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)vnode.h 8.17 (Berkeley) 5/20/95
62 */
63/*
64 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
65 * support for mandatory and extensible security protections. This notice
66 * is included in support of clause 2.2 (b) of the Apple Public License,
67 * Version 2.0.
68 */
69
70#ifndef _SYS_VNODE_INTERNAL_H_
71#define _SYS_VNODE_INTERNAL_H_
72
73#include <sys/appleapiopts.h>
74#include <sys/cdefs.h>
75#include <sys/queue.h>
76#include <sys/lock.h>
77
78#include <sys/time.h>
79#include <sys/uio.h>
80
81#include <sys/vm.h>
82#include <sys/systm.h>
83#include <kern/locks.h>
84#include <vm/vm_kern.h>
85#include <sys/vnode.h>
86#include <sys/namei.h>
87#include <sys/vfs_context.h>
88#include <sys/sysctl.h>
89
90
91struct lockf;
92struct label;
93
94LIST_HEAD(buflists, buf);
95
96#if CONFIG_TRIGGERS
97/*
98 * VFS Internal (private) trigger vnode resolver info.
99 */
100struct vnode_resolve {
101 lck_mtx_t vr_lock; /* protects vnode_resolve_t fields */
102 trigger_vnode_resolve_callback_t vr_resolve_func;
103 trigger_vnode_unresolve_callback_t vr_unresolve_func;
104 trigger_vnode_rearm_callback_t vr_rearm_func;
105 trigger_vnode_reclaim_callback_t vr_reclaim_func;
106 void * vr_data; /* private data for resolver */
107 uint32_t vr_flags;
108 uint32_t vr_lastseq;
109};
110typedef struct vnode_resolve *vnode_resolve_t;
111
112/* private vr_flags */
113#define VNT_RESOLVED (1UL << 31)
114#define VNT_VFS_UNMOUNTED (1UL << 30)
115#define VNT_EXTERNAL (1UL << 29)
116
117#endif /* CONFIG_TRIGGERS */
118
119/*
120 * Reading or writing any of these items requires holding the appropriate lock.
121 * v_freelist is locked by the global vnode_list_lock
122 * v_mntvnodes is locked by the mount_lock
123 * v_nclinks and v_ncchildren are protected by the global name_cache_lock
124 * v_cleanblkhd and v_dirtyblkhd and v_iterblkflags are locked via the global buf_mtxp
125 * the rest of the structure is protected by the vnode_lock
126 */
127struct vnode {
128 lck_mtx_t v_lock; /* vnode mutex */
129 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
130 TAILQ_ENTRY(vnode) v_mntvnodes; /* vnodes for mount point */
131 TAILQ_HEAD(, namecache) v_ncchildren; /* name cache entries that regard us as their parent */
132 LIST_HEAD(, namecache) v_nclinks; /* name cache entries that name this vnode */
133 vnode_t v_defer_reclaimlist; /* in case we have to defer the reclaim to avoid recursion */
134 uint32_t v_listflag; /* flags protected by the vnode_list_lock (see below) */
135 uint32_t v_flag; /* vnode flags (see below) */
136 uint16_t v_lflag; /* vnode local and named ref flags */
137 uint8_t v_iterblkflags; /* buf iterator flags */
138 uint8_t v_references; /* number of times io_count has been granted */
139 int32_t v_kusecount; /* count of in-kernel refs */
140 int32_t v_usecount; /* reference count of users */
141 int32_t v_iocount; /* iocounters */
142 void * v_owner; /* act that owns the vnode */
143 uint16_t v_type; /* vnode type */
144 uint16_t v_tag; /* type of underlying data */
145 uint32_t v_id; /* identity of vnode contents */
146 union {
147 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
148 struct socket *vu_socket; /* unix ipc (VSOCK) */
149 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */
150 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
151 struct ubc_info *vu_ubcinfo; /* valid for (VREG) */
152 } v_un;
153 struct buflists v_cleanblkhd; /* clean blocklist head */
154 struct buflists v_dirtyblkhd; /* dirty blocklist head */
155 struct klist v_knotes; /* knotes attached to this vnode */
156 /*
157 * the following 4 fields are protected
158 * by the name_cache_lock held in
159 * excluive mode
160 */
161 kauth_cred_t v_cred; /* last authorized credential */
162 kauth_action_t v_authorized_actions; /* current authorized actions for v_cred */
163 int v_cred_timestamp; /* determine if entry is stale for MNTK_AUTH_OPAQUE */
164 int v_nc_generation; /* changes when nodes are removed from the name cache */
165 /*
166 * back to the vnode lock for protection
167 */
168 int32_t v_numoutput; /* num of writes in progress */
169 int32_t v_writecount; /* reference count of writers */
170 const char *v_name; /* name component of the vnode */
171 vnode_t v_parent; /* pointer to parent vnode */
172 struct lockf *v_lockf; /* advisory lock list head */
173 int (**v_op)(void *); /* vnode operations vector */
174 mount_t v_mount; /* ptr to vfs we are in */
175 void * v_data; /* private data for fs */
176#if CONFIG_MACF
177 struct label *v_label; /* MAC security label */
178#endif
179#if CONFIG_TRIGGERS
180 vnode_resolve_t v_resolve; /* trigger vnode resolve info (VDIR only) */
181#endif /* CONFIG_TRIGGERS */
182};
183
184#define v_mountedhere v_un.vu_mountedhere
185#define v_socket v_un.vu_socket
186#define v_specinfo v_un.vu_specinfo
187#define v_fifoinfo v_un.vu_fifoinfo
188#define v_ubcinfo v_un.vu_ubcinfo
189
190
191/*
192 * v_iterblkflags
193 */
194#define VBI_ITER 0x1
195#define VBI_ITERWANT 0x2
196#define VBI_CLEAN 0x4
197#define VBI_DIRTY 0x8
198#define VBI_NEWBUF 0x10
199
200/*
201 * v_listflag
202 */
203#define VLIST_RAGE 0x01 /* vnode is currently in the rapid age list */
204#define VLIST_DEAD 0x02 /* vnode is currently in the dead list */
205#define VLIST_ASYNC_WORK 0x04 /* vnode is currently on the deferred async work queue */
206
207/*
208 * v_lflags
209 */
210#define VL_SUSPENDED 0x0001 /* vnode is suspended */
211#define VL_DRAIN 0x0002 /* vnode is being drained */
212#define VL_TERMINATE 0x0004 /* vnode is in the process of being recycled */
213#define VL_TERMWANT 0x0008 /* there's a waiter for recycle finish (vnode_getiocount)*/
214#define VL_DEAD 0x0010 /* vnode is dead, cleaned of filesystem-specific info */
215#define VL_MARKTERM 0x0020 /* vnode should be recycled when no longer referenced */
216#define VL_NEEDINACTIVE 0x0080 /* delay VNOP_INACTIVE until iocount goes to 0 */
217
218#define VL_LABEL 0x0100 /* vnode is marked for labeling */
219#define VL_LABELWAIT 0x0200 /* vnode is marked for labeling */
220#define VL_LABELED 0x0400 /* vnode is labeled */
221#define VL_LWARNED 0x0800
222#define VL_HASSTREAMS 0x1000 /* vnode has had at least one associated named stream vnode (may not have one any longer) */
223
224#define VNAMED_UBC 0x2000 /* ubc named reference */
225#define VNAMED_MOUNT 0x4000 /* mount point named reference */
226#define VNAMED_FSHASH 0x8000 /* FS hash named reference */
227
228/*
229 * v_flags
230 */
231#define VROOT 0x000001 /* root of its file system */
232#define VTEXT 0x000002 /* vnode is a pure text prototype */
233#define VSYSTEM 0x000004 /* vnode being used by kernel */
234#define VISTTY 0x000008 /* vnode represents a tty */
235#define VRAGE 0x000010 /* vnode is in rapid age state */
236#define VBDEVVP 0x000020 /* vnode created by bdevvp */
237#define VDEVFLUSH 0x000040 /* device vnode after vflush */
238#define VMOUNT 0x000080 /* mount operation in progress */
239#define VBWAIT 0x000100 /* waiting for output to complete */
240#define VSHARED_DYLD 0x000200 /* vnode is a dyld shared cache file */
241#define VNOCACHE_DATA 0x000400 /* don't keep data cached once it's been consumed */
242#define VSTANDARD 0x000800 /* vnode obtained from common pool */
243#define VAGE 0x001000 /* Insert vnode at head of free list */
244#define VRAOFF 0x002000 /* read ahead disabled */
245#define VNCACHEABLE 0x004000 /* vnode is allowed to be put back in name cache */
246#if NAMEDSTREAMS
247#define VISSHADOW 0x008000 /* vnode is a shadow file */
248#endif
249#define VSWAP 0x010000 /* vnode is being used as swapfile */
250#define VTHROTTLED 0x020000 /* writes or pageouts have been throttled */
251 /* wakeup tasks waiting when count falls below threshold */
252#define VNOFLUSH 0x040000 /* don't vflush() if SKIPSYSTEM */
253#define VLOCKLOCAL 0x080000 /* this vnode does adv locking in vfs */
254#define VISHARDLINK 0x100000 /* hard link needs special processing on lookup and in volfs */
255#define VISUNION 0x200000 /* union special processing */
256#define VISNAMEDSTREAM 0x400000 /* vnode is a named stream (eg HFS resource fork) */
257#define VOPENEVT 0x800000 /* if process is P_CHECKOPENEVT, then or in the O_EVTONLY flag on open */
258#define VNEEDSSNAPSHOT 0x1000000
259#define VNOCS 0x2000000 /* is there no code signature available */
260#define VISDIRTY 0x4000000 /* vnode will need IO if reclaimed */
261#define VFASTDEVCANDIDATE 0x8000000 /* vnode is a candidate to store on a fast device */
262#define VAUTOCANDIDATE 0x10000000 /* vnode was automatically marked as a fast-dev candidate */
263/*
264 0x20000000 not used
265 0x40000000 not used
266 0x80000000 not used.
267*/
268
269/*
270 * This structure describes vnode data which is specific to a file descriptor.
271 * It is currently used only for file descriptors which are for opened for
272 * directories.
273 */
274struct fd_vn_data {
275 lck_mtx_t fv_lock; /* Used to serialize directory enumeration on fd */
276 off_t fv_offset; /* Offset to be used */
277 void *fv_dircookie; /* If FS doesn't like offsets in directories */
278 caddr_t fv_buf; /* Temporary buffer to store directory entries */
279 size_t fv_bufsiz; /* Valid size of fv_buf */
280 size_t fv_bufdone; /* How much of fv_buf is processed */
281 size_t fv_bufallocsiz; /* Allocation size determined for Buffer*/
282 off_t fv_soff; /* Starting FS offset for this buffer */
283 off_t fv_eoff; /* Ending FS offset for this buffer */
284 int fv_eofflag;/* Does fv_eoff represent EOF ? */
285};
286
287/*
288 * FV_DIRBUF_START_SIZ is the initial size of the buffer passed to VNOP_READDIR.
289 * That may not be enough for some filesytems so the current algorithm works its
290 * way upto FV_DIRBUF_MAX_SIZ
291 */
292#define FV_DIRBUF_DIRENTRY_SIZ (sizeof(struct direntry))
293#define FV_DIRBUF_START_SIZ FV_DIRBUF_DIRENTRY_SIZ
294#define FV_DIRBUF_MAX_SIZ (4*(sizeof(struct direntry)))
295
296#define FV_LOCK(fvd) lck_mtx_lock(&(((struct fd_vn_data *)fvd)->fv_lock))
297#define FV_UNLOCK(fvd) lck_mtx_unlock(&(((struct fd_vn_data *)fvd)->fv_lock))
298
299/*
300 * Global vnode data.
301 */
302extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
303
304#ifdef CONFIG_IMGSRC_ACCESS
305#define MAX_IMAGEBOOT_NESTING 2
306extern struct vnode *imgsrc_rootvnodes[];
307#endif /* CONFIG_IMGSRC_ACCESS */
308
309
310/*
311 * Mods for exensibility.
312 */
313
314/*
315 * Flags for vdesc_flags:
316 */
317#define VDESC_MAX_VPS 16
318/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
319#define VDESC_VP0_WILLRELE 0x00001
320#define VDESC_VP1_WILLRELE 0x00002
321#define VDESC_VP2_WILLRELE 0x00004
322#define VDESC_VP3_WILLRELE 0x00008
323#define VDESC_NOMAP_VPP 0x00100
324#define VDESC_VPP_WILLRELE 0x00200
325
326#define VDESC_DISABLED 0x10000 /* descriptor defined but op is unused, has no op slot */
327
328/*
329 * VDESC_NO_OFFSET is used to identify the end of the offset list
330 * and in places where no such field exists.
331 */
332#define VDESC_NO_OFFSET -1
333
334/*
335 * This structure describes the vnode operation taking place.
336 */
337struct vnodeop_desc {
338 int vdesc_offset; /* offset in vector--first for speed */
339 const char *vdesc_name; /* a readable name for debugging */
340 int vdesc_flags; /* VDESC_* flags */
341
342 /*
343 * These ops are used by bypass routines to map and locate arguments.
344 * Creds and procs are not needed in bypass routines, but sometimes
345 * they are useful to (for example) transport layers.
346 * Nameidata is useful because it has a cred in it.
347 */
348 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
349 int vdesc_vpp_offset; /* return vpp location */
350 int vdesc_cred_offset; /* cred location, if any */
351 int vdesc_proc_offset; /* proc location, if any */
352 int vdesc_componentname_offset; /* if any */
353 int vdesc_context_offset; /* context location, if any */
354 /*
355 * Finally, we've got a list of private data (about each operation)
356 * for each transport layer. (Support to manage this list is not
357 * yet part of BSD.)
358 */
359 caddr_t *vdesc_transports;
360};
361
362/*
363 * A list of all the operation descs.
364 */
365extern struct vnodeop_desc *vnodeop_descs[];
366
367
368/*
369 * This macro is very helpful in defining those offsets in the vdesc struct.
370 *
371 * This is stolen from X11R4. I ingored all the fancy stuff for
372 * Crays, so if you decide to port this to such a serious machine,
373 * you might want to consult Intrisics.h's XtOffset{,Of,To}.
374 */
375#define VOPARG_OFFSET(p_type,field) \
376 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
377#define VOPARG_OFFSETOF(s_type,field) \
378 VOPARG_OFFSET(s_type*,field)
379#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
380 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
381
382
383
384/*
385 * VOCALL calls an op given an ops vector. We break it out because BSD's
386 * vclean changes the ops vector and then wants to call ops with the old
387 * vector.
388 */
389#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
390
391/*
392 * This call works for vnodes in the kernel.
393 */
394#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
395#define VDESC(OP) (& __CONCAT(OP,_desc))
396#define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
397
398struct ostat;
399
400/* bdevvp moved to vnode.h as private KPI */
401void cvtstat(struct stat *st, struct ostat *ost);
402void vprint(const char *label, struct vnode *vp);
403
404
405__private_extern__ int set_package_extensions_table(user_addr_t data, int nentries, int maxwidth);
406int vn_rdwr_64(enum uio_rw rw, struct vnode *vp, uint64_t base,
407 int64_t len, off_t offset, enum uio_seg segflg,
408 int ioflg, kauth_cred_t cred, int64_t *aresid,
409 struct proc *p);
410#if CONFIG_MACF
411int vn_setlabel (struct vnode *vp, struct label *intlabel,
412 vfs_context_t context);
413#endif
414void fifo_printinfo(struct vnode *vp);
415int vn_open(struct nameidata *ndp, int fmode, int cmode);
416int vn_open_modflags(struct nameidata *ndp, int *fmode, int cmode);
417int vn_open_auth(struct nameidata *ndp, int *fmode, struct vnode_attr *);
418int vn_close(vnode_t, int flags, vfs_context_t ctx);
419errno_t vn_remove(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, struct vnode_attr *vap, vfs_context_t ctx);
420errno_t vn_rename(struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
421 struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
422 uint32_t flags, vfs_context_t ctx);
423
424void lock_vnode_and_post(vnode_t, int);
425
426#define post_event_if_success(_vp, _error, _event) \
427 do { \
428 if (0 == (_error)) { \
429 lock_vnode_and_post((_vp), (_event)); \
430 } \
431 } while (0)
432
433/* Authorization subroutines */
434int vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs_context_t ctx, void *reserved);
435int vn_authorize_create(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
436int vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fieldsp, vfs_context_t ctx);
437void vn_attribute_cleanup(struct vnode_attr *vap, uint32_t defaulted_fields);
438int vn_authorize_unlink(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_context_t ctx, void *reserved);
439int vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
440 struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
441 vfs_context_t ctx, void *reserved);
442int vn_authorize_renamex(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
443 struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
444 vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved);
445int vn_authorize_renamex_with_paths(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, const char *from_path,
446 struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, const char *to_path,
447 vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved);
448int vn_authorize_rmdir(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_context_t ctx, void *reserved);
449
450typedef int (*vn_create_authorizer_t)(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
451int vn_authorize_mkdir(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
452int vn_authorize_null(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
453int vnode_attr_authorize_dir_clone(struct vnode_attr *vap, kauth_action_t action,
454 struct vnode_attr *dvap, vnode_t sdvp, mount_t mp, dir_clone_authorizer_op_t vattr_op,
455 uint32_t flags, vfs_context_t ctx, void *reserved);
456/* End of authorization subroutines */
457
458#define VN_CREATE_NOAUTH (1<<0)
459#define VN_CREATE_NOINHERIT (1<<1)
460#define VN_CREATE_UNION (1<<2)
461#define VN_CREATE_NOLABEL (1<<3)
462#define VN_CREATE_DOOPEN (1<<4) /* Open file if a batched operation is available */
463errno_t vn_create(vnode_t, vnode_t *, struct nameidata *, struct vnode_attr *, uint32_t, int, uint32_t*, vfs_context_t);
464int vn_mkdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx);
465int vn_rmdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx);
466
467int vn_getxattr(vnode_t, const char *, uio_t, size_t *, int, vfs_context_t);
468int vn_setxattr(vnode_t, const char *, uio_t, int, vfs_context_t);
469int vn_removexattr(vnode_t, const char *, int, vfs_context_t);
470int vn_listxattr(vnode_t, uio_t, size_t *, int, vfs_context_t);
471
472#if NAMEDSTREAMS
473errno_t vnode_getnamedstream(vnode_t, vnode_t *, const char *, enum nsoperation, int, vfs_context_t);
474errno_t vnode_makenamedstream(vnode_t, vnode_t *, const char *, int, vfs_context_t);
475errno_t vnode_removenamedstream(vnode_t, vnode_t, const char *, int, vfs_context_t);
476errno_t vnode_flushnamedstream(vnode_t vp, vnode_t svp, vfs_context_t context);
477errno_t vnode_relenamedstream(vnode_t vp, vnode_t svp);
478errno_t vnode_verifynamedstream (vnode_t vp);
479#endif
480
481
482void nchinit(void);
483int resize_namecache(int newsize);
484void name_cache_lock_shared(void);
485void name_cache_lock(void);
486void name_cache_unlock(void);
487void cache_enter_with_gen(vnode_t dvp, vnode_t vp, struct componentname *cnp, int gen);
488const char *cache_enter_create(vnode_t dvp, vnode_t vp, struct componentname *cnp);
489
490extern int nc_disabled;
491
492#define vnode_lock_convert(v) lck_mtx_convert_spin(&(v)->v_lock)
493
494void vnode_lock_spin(vnode_t);
495
496
497void vnode_list_lock(void);
498void vnode_list_unlock(void);
499
500#define VNODE_REF_FORCE 0x1
501int vnode_ref_ext(vnode_t, int, int);
502
503void vnode_rele_internal(vnode_t, int, int, int);
504#ifdef BSD_KERNEL_PRIVATE
505int vnode_getalways(vnode_t);
506int vget_internal(vnode_t, int, int);
507errno_t vnode_getiocount(vnode_t, unsigned int, int);
508#endif /* BSD_KERNEL_PRIVATE */
509int vnode_get_locked(vnode_t);
510int vnode_put_locked(vnode_t);
511
512int vnode_issock(vnode_t);
513int vnode_isaliased(vnode_t);
514
515void unlock_fsnode(vnode_t, int *);
516int lock_fsnode(vnode_t, int *);
517
518errno_t vnode_resume(vnode_t);
519errno_t vnode_suspend(vnode_t);
520
521
522errno_t vnode_mtime(vnode_t, struct timespec *, vfs_context_t);
523errno_t vnode_flags(vnode_t, uint32_t *, vfs_context_t);
524
525errno_t vnode_size(vnode_t, off_t *, vfs_context_t);
526errno_t vnode_setsize(vnode_t, off_t, int ioflag, vfs_context_t);
527int vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx);
528int vnode_isspec(vnode_t vp);
529
530
531#ifdef BSD_KERNEL_PRIVATE
532
533typedef uint32_t compound_vnop_id_t;
534#define COMPOUND_VNOP_OPEN 0x01
535#define COMPOUND_VNOP_MKDIR 0x02
536#define COMPOUND_VNOP_RENAME 0x04
537#define COMPOUND_VNOP_REMOVE 0x08
538#define COMPOUND_VNOP_RMDIR 0x10
539
540int vnode_compound_rename_available(vnode_t vp);
541int vnode_compound_rmdir_available(vnode_t vp);
542int vnode_compound_mkdir_available(vnode_t vp);
543int vnode_compound_remove_available(vnode_t vp);
544int vnode_compound_open_available(vnode_t vp);
545int vnode_compound_op_available(vnode_t, compound_vnop_id_t);
546#endif /* BSD_KERNEL_PRIVATE */
547
548void vn_setunionwait(vnode_t);
549void vn_checkunionwait(vnode_t);
550void vn_clearunionwait(vnode_t, int);
551
552void SPECHASH_LOCK(void);
553void SPECHASH_UNLOCK(void);
554
555void vnode_authorize_init(void);
556
557void vfsinit(void);
558void vnode_lock(vnode_t);
559void vnode_unlock(vnode_t);
560
561void vn_print_state(vnode_t /* vp */, const char * /* fmt */, ...)
562 __printflike(2,3);
563
564#if DEVELOPMENT || DEBUG
565#define VNASSERT(exp, vp, msg) \
566do { \
567 if (__improbable(!(exp))) { \
568 vn_print_state(vp, "VNASSERT failed %s:%d\n", __FILE__, \
569 __LINE__); \
570 panic msg; \
571 } \
572} while (0)
573#else
574#define VNASSERT(exp, vp, msg)
575#endif /* DEVELOPMENT || DEBUG */
576
577/*
578 * XXX exported symbols; should be static
579 */
580void vfs_op_init(void);
581void vfs_opv_init(void);
582
583#ifdef BSD_KERNEL_PRIVATE
584int vfs_sysctl_node SYSCTL_HANDLER_ARGS;
585void vnode_setneedinactive(vnode_t);
586int vnode_hasnamedstreams(vnode_t); /* Does this vnode have associated named streams? */
587
588void nspace_proc_exit(struct proc *p);
589
590errno_t
591vnode_readdir64(struct vnode *vp, struct uio *uio, int flags, int *eofflag,
592 int *numdirent, vfs_context_t ctxp);
593
594void vnode_setswapmount(vnode_t);
595int64_t vnode_getswappin_avail(vnode_t);
596
597int vnode_get_snapdir(vnode_t , vnode_t *, vfs_context_t);
598
599#if CONFIG_TRIGGERS
600/* VFS Internal Vnode Trigger Interfaces (Private) */
601int vnode_trigger_resolve(vnode_t, struct nameidata *, vfs_context_t);
602void vnode_trigger_rearm(vnode_t, vfs_context_t);
603void vfs_nested_trigger_unmounts(mount_t, int, vfs_context_t);
604#endif /* CONFIG_TRIGGERS */
605
606int build_path_with_parent(vnode_t, vnode_t /* parent */, char *, int, int *, int, vfs_context_t);
607
608#endif /* BSD_KERNEL_PRIVATE */
609
610#endif /* !_SYS_VNODE_INTERNAL_H_ */
611