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        LIST_HEAD(, namecache) v_nclinks;	/* name cache entries that name this vnode */
132        LIST_HEAD(, namecache) v_ncchildren;	/* name cache entries that regard us as their parent */
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#if NAMEDSTREAMS
257#define	VISNAMEDSTREAM	0x400000	/* vnode is a named stream (eg HFS resource fork) */
258#endif
259#define VOPENEVT        0x800000        /* if process is P_CHECKOPENEVT, then or in the O_EVTONLY flag on open */
260#define VNEEDSSNAPSHOT 0x1000000
261#define VNOCS	       0x2000000	/* is there no code signature available */
262#define VISDIRTY       0x4000000        /* vnode will need IO if reclaimed */
263
264/*
265 * This structure describes vnode data which is specific to a file descriptor.
266 * It is currently used only for file descriptors which are for opened for
267 * directories.
268 */
269struct fd_vn_data {
270	lck_mtx_t fv_lock;   /* Used to serialize directory enumeration on fd */
271	off_t     fv_offset; /* Offset to be used */
272	void      *fv_dircookie; /* If FS doesn't like offsets in directories */
273	caddr_t   fv_buf;    /* Temporary buffer to store directory entries */
274	size_t    fv_bufsiz;  /* Valid size of fv_buf */
275	size_t    fv_bufdone; /* How much of fv_buf is processed */
276	size_t    fv_bufallocsiz; /* Allocation size determined for Buffer*/
277	off_t     fv_soff;   /* Starting FS offset for this buffer */
278	off_t     fv_eoff;   /* Ending FS offset for this buffer */
279	int       fv_eofflag;/* Does fv_eoff represent EOF ? */
280};
281
282/*
283 * FV_DIRBUF_START_SIZ is the initial size of the buffer passed to VNOP_READDIR.
284 * That may not be enough for some filesytems so the current algorithm works its
285 * way upto FV_DIRBUF_MAX_SIZ
286 */
287#define FV_DIRBUF_DIRENTRY_SIZ	(sizeof(struct direntry))
288#define FV_DIRBUF_START_SIZ	FV_DIRBUF_DIRENTRY_SIZ
289#define FV_DIRBUF_MAX_SIZ	(4*(sizeof(struct direntry)))
290
291#define FV_LOCK(fvd) lck_mtx_lock(&(((struct fd_vn_data *)fvd)->fv_lock))
292#define FV_UNLOCK(fvd) lck_mtx_unlock(&(((struct fd_vn_data *)fvd)->fv_lock))
293#define FV_BUF_FREE(fvd, tag)      \
294do {                               \
295	FREE(fvd->fv_buf, tag);    \
296	fvd->fv_buf = NULL;        \
297	fvd->fv_bufsiz = 0;        \
298	fvd->fv_bufdone = 0;       \
299	fvd->fv_soff = 0;          \
300	fvd->fv_eoff = 0;          \
301	fvd->fv_eofflag = 0;       \
302} while (0);
303
304/*
305 * Global vnode data.
306 */
307extern	struct vnode *rootvnode;	/* root (i.e. "/") vnode */
308
309#ifdef CONFIG_IMGSRC_ACCESS
310#define MAX_IMAGEBOOT_NESTING	2
311extern	struct vnode *imgsrc_rootvnodes[];
312#endif /* CONFIG_IMGSRC_ACCESS */
313
314
315/*
316 * Mods for exensibility.
317 */
318
319/*
320 * Flags for vdesc_flags:
321 */
322#define VDESC_MAX_VPS		16
323/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
324#define VDESC_VP0_WILLRELE	0x0001
325#define VDESC_VP1_WILLRELE	0x0002
326#define VDESC_VP2_WILLRELE	0x0004
327#define VDESC_VP3_WILLRELE	0x0008
328#define VDESC_NOMAP_VPP		0x0100
329#define VDESC_VPP_WILLRELE	0x0200
330
331/*
332 * VDESC_NO_OFFSET is used to identify the end of the offset list
333 * and in places where no such field exists.
334 */
335#define VDESC_NO_OFFSET -1
336
337/*
338 * This structure describes the vnode operation taking place.
339 */
340struct vnodeop_desc {
341	int	vdesc_offset;		/* offset in vector--first for speed */
342	const char *vdesc_name;		/* a readable name for debugging */
343	int	vdesc_flags;		/* VDESC_* flags */
344
345	/*
346	 * These ops are used by bypass routines to map and locate arguments.
347	 * Creds and procs are not needed in bypass routines, but sometimes
348	 * they are useful to (for example) transport layers.
349	 * Nameidata is useful because it has a cred in it.
350	 */
351	int	*vdesc_vp_offsets;	/* list ended by VDESC_NO_OFFSET */
352	int	vdesc_vpp_offset;	/* return vpp location */
353	int	vdesc_cred_offset;	/* cred location, if any */
354	int	vdesc_proc_offset;	/* proc location, if any */
355	int	vdesc_componentname_offset; /* if any */
356	int	vdesc_context_offset;	/* context location, if any */
357	/*
358	 * Finally, we've got a list of private data (about each operation)
359	 * for each transport layer.  (Support to manage this list is not
360	 * yet part of BSD.)
361	 */
362	caddr_t	*vdesc_transports;
363};
364
365/*
366 * A list of all the operation descs.
367 */
368extern struct vnodeop_desc *vnodeop_descs[];
369
370
371/*
372 * This macro is very helpful in defining those offsets in the vdesc struct.
373 *
374 * This is stolen from X11R4.  I ingored all the fancy stuff for
375 * Crays, so if you decide to port this to such a serious machine,
376 * you might want to consult Intrisics.h's XtOffset{,Of,To}.
377 */
378#define VOPARG_OFFSET(p_type,field) \
379        ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
380#define VOPARG_OFFSETOF(s_type,field) \
381	VOPARG_OFFSET(s_type*,field)
382#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
383	((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
384
385
386
387/*
388 * VOCALL calls an op given an ops vector.  We break it out because BSD's
389 * vclean changes the ops vector and then wants to call ops with the old
390 * vector.
391 */
392#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
393
394/*
395 * This call works for vnodes in the kernel.
396 */
397#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
398#define VDESC(OP) (& __CONCAT(OP,_desc))
399#define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
400
401struct ostat;
402
403#define BUILDPATH_NO_FS_ENTER     0x1 /* Use cache values, do not enter file system */
404#define BUILDPATH_CHECKACCESS     0x2 /* Check if parents have search rights */
405#define BUILDPATH_CHECK_MOVED     0x4 /* Return EAGAIN if the parent hierarchy is modified */
406#define BUILDPATH_VOLUME_RELATIVE 0x8 /* Return path relative to the nearest mount point */
407
408int	build_path(vnode_t first_vp, char *buff, int buflen, int *outlen, int flags, vfs_context_t ctx);
409
410int 	bdevvp(dev_t dev, struct vnode **vpp);
411void	cvtstat(struct stat *st, struct ostat *ost);
412void	vprint(const char *label, struct vnode *vp);
413
414
415__private_extern__ int is_package_name(const char *name, int len);
416__private_extern__ int set_package_extensions_table(user_addr_t data, int nentries, int maxwidth);
417int 	vn_rdwr_64(enum uio_rw rw, struct vnode *vp, uint64_t base,
418	    		int64_t len, off_t offset, enum uio_seg segflg,
419			int ioflg, kauth_cred_t cred, int64_t *aresid,
420			struct proc *p);
421#if CONFIG_MACF
422int	vn_setlabel (struct vnode *vp, struct label *intlabel,
423	    vfs_context_t context);
424#endif
425void	fifo_printinfo(struct vnode *vp);
426int 	vn_open(struct nameidata *ndp, int fmode, int cmode);
427int	vn_open_modflags(struct nameidata *ndp, int *fmode, int cmode);
428int	vn_open_auth(struct nameidata *ndp, int *fmode, struct vnode_attr *);
429int 	vn_close(vnode_t, int flags, vfs_context_t ctx);
430errno_t vn_remove(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, struct vnode_attr *vap, vfs_context_t ctx);
431errno_t vn_rename(struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap,
432       	     struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap,
433       	     uint32_t flags, vfs_context_t ctx);
434
435void	lock_vnode_and_post(vnode_t, int);
436
437#define post_event_if_success(_vp, _error, _event) \
438	do { \
439		if (0 == (_error)) {	\
440			lock_vnode_and_post((_vp), (_event)); \
441		} \
442	} while (0)
443
444/* Authorization subroutines */
445int	vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs_context_t ctx, void *reserved);
446int	vn_authorize_create(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
447int	vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fieldsp, vfs_context_t ctx);
448void	vn_attribute_cleanup(struct vnode_attr *vap, uint32_t defaulted_fields);
449int	vn_authorize_unlink(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_context_t ctx, void *reserved);
450int 	vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
451       		struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp,
452            	vfs_context_t ctx, void *reserved);
453int	vn_authorize_rmdir(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_context_t ctx, void *reserved);
454
455typedef int (*vn_create_authorizer_t)(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
456int vn_authorize_mkdir(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
457int vn_authorize_null(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*);
458/* End of authorization subroutines */
459
460#define VN_CREATE_NOAUTH		(1<<0)
461#define VN_CREATE_NOINHERIT		(1<<1)
462#define VN_CREATE_UNION			(1<<2)
463#define	VN_CREATE_NOLABEL		(1<<3)
464#define	VN_CREATE_DOOPEN		(1<<4)	/* Open file if a batched operation is available */
465errno_t vn_create(vnode_t, vnode_t *, struct nameidata *, struct vnode_attr *, uint32_t, int, uint32_t*, vfs_context_t);
466int	vn_mkdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx);
467int 	vn_rmdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx);
468
469int	vn_getxattr(vnode_t, const char *, uio_t, size_t *, int, vfs_context_t);
470int	vn_setxattr(vnode_t, const char *, uio_t, int, vfs_context_t);
471int	vn_removexattr(vnode_t, const char *, int, vfs_context_t);
472int	vn_listxattr(vnode_t, uio_t, size_t *, int, vfs_context_t);
473
474#if NAMEDSTREAMS
475errno_t  vnode_getnamedstream(vnode_t, vnode_t *, const char *, enum nsoperation, int, vfs_context_t);
476errno_t  vnode_makenamedstream(vnode_t, vnode_t *, const char *, int, vfs_context_t);
477errno_t  vnode_removenamedstream(vnode_t, vnode_t, const char *, int, vfs_context_t);
478errno_t  vnode_flushnamedstream(vnode_t vp, vnode_t svp, vfs_context_t context);
479errno_t  vnode_relenamedstream(vnode_t vp, vnode_t svp);
480errno_t  vnode_verifynamedstream (vnode_t vp);
481#endif
482
483
484void	nchinit(void);
485int	resize_namecache(uint32_t newsize);
486void	name_cache_lock_shared(void);
487void	name_cache_lock(void);
488void	name_cache_unlock(void);
489void	cache_enter_with_gen(vnode_t dvp, vnode_t vp, struct componentname *cnp, int gen);
490const char *cache_enter_create(vnode_t dvp, vnode_t vp, struct componentname *cnp);
491
492int vn_pathconf(vnode_t, int, int32_t *, vfs_context_t);
493extern int nc_disabled;
494
495#define	vnode_lock_convert(v)	lck_mtx_convert_spin(&(v)->v_lock)
496
497void	vnode_lock_spin(vnode_t);
498
499
500void	vnode_list_lock(void);
501void	vnode_list_unlock(void);
502
503#define VNODE_REF_FORCE	0x1
504int	vnode_ref_ext(vnode_t, int, int);
505
506void	vnode_rele_ext(vnode_t, int, int);
507void	vnode_rele_internal(vnode_t, int, int, int);
508#ifdef BSD_KERNEL_PRIVATE
509int	vnode_getalways(vnode_t);
510int 	vget_internal(vnode_t, int, int);
511errno_t vnode_getiocount(vnode_t, unsigned int, int);
512#endif /* BSD_KERNEL_PRIVATE */
513int	vnode_get_locked(vnode_t);
514int	vnode_put_locked(vnode_t);
515
516int	vnode_issock(vnode_t);
517int	vnode_isaliased(vnode_t);
518
519void	unlock_fsnode(vnode_t, int *);
520int	lock_fsnode(vnode_t, int *);
521
522errno_t	vnode_resume(vnode_t);
523errno_t	vnode_suspend(vnode_t);
524
525
526errno_t	vnode_mtime(vnode_t, struct timespec *, vfs_context_t);
527errno_t vnode_flags(vnode_t, uint32_t *, vfs_context_t);
528
529errno_t	vnode_size(vnode_t, off_t *, vfs_context_t);
530errno_t	vnode_setsize(vnode_t, off_t, int ioflag, vfs_context_t);
531int	vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx);
532int	vnode_isspec(vnode_t vp);
533
534
535#ifdef BSD_KERNEL_PRIVATE
536
537typedef uint32_t compound_vnop_id_t;
538#define	COMPOUND_VNOP_OPEN		0x01
539#define	COMPOUND_VNOP_MKDIR		0x02
540#define	COMPOUND_VNOP_RENAME		0x04
541#define	COMPOUND_VNOP_REMOVE		0x08
542#define	COMPOUND_VNOP_RMDIR		0x10
543
544int 	vnode_compound_rename_available(vnode_t vp);
545int 	vnode_compound_rmdir_available(vnode_t vp);
546int 	vnode_compound_mkdir_available(vnode_t vp);
547int 	vnode_compound_remove_available(vnode_t vp);
548int 	vnode_compound_open_available(vnode_t vp);
549int    	vnode_compound_op_available(vnode_t, compound_vnop_id_t);
550#endif /* BSD_KERNEL_PRIVATE */
551
552void vn_setunionwait(vnode_t);
553void vn_checkunionwait(vnode_t);
554void vn_clearunionwait(vnode_t, int);
555
556void SPECHASH_LOCK(void);
557void SPECHASH_UNLOCK(void);
558
559void	vnode_authorize_init(void);
560
561void	vfsinit(void);
562void vnode_lock(vnode_t);
563void vnode_unlock(vnode_t);
564
565/*
566 * XXX exported symbols; should be static
567 */
568void	vfs_op_init(void);
569void	vfs_opv_init(void);
570
571#ifdef BSD_KERNEL_PRIVATE
572int vfs_sysctl_node SYSCTL_HANDLER_ARGS;
573void vnode_setneedinactive(vnode_t);
574int 	vnode_hasnamedstreams(vnode_t); /* Does this vnode have associated named streams? */
575
576void nspace_proc_exit(struct proc *p);
577
578errno_t
579vnode_readdir64(struct vnode *vp, struct uio *uio, int flags, int *eofflag,
580                int *numdirent, vfs_context_t ctxp);
581
582void vnode_setswapmount(vnode_t);
583
584#if CONFIG_TRIGGERS
585/* VFS Internal Vnode Trigger Interfaces (Private) */
586int vnode_trigger_resolve(vnode_t, struct nameidata *, vfs_context_t);
587void vnode_trigger_rearm(vnode_t, vfs_context_t);
588void vfs_nested_trigger_unmounts(mount_t, int, vfs_context_t);
589#endif /* CONFIG_TRIGGERS */
590
591#endif /* BSD_KERNEL_PRIVATE */
592
593#endif /* !_SYS_VNODE_INTERNAL_H_ */
594