[apple/xnu.git] / bsd / nfs / nfsnode.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)nfsnode.h	8.9 (Berkeley) 5/14/95
 * FreeBSD-Id: nfsnode.h,v 1.24 1997/10/28 14:06:25 bde Exp $
 */


#ifndef _NFS_NFSNODE_H_
#define _NFS_NFSNODE_H_

#ifndef _NFS_NFS_H_
#include <nfs/nfs.h>
#endif

/*
 * Silly rename structure that hangs off the nfsnode until the name
 * can be removed by nfs_inactive()
 */
struct sillyrename {
	struct	ucred *s_cred;
	struct	vnode *s_dvp;
	long	s_namlen;
	char	s_name[20];
};

/*
 * This structure is used to save the logical directory offset to
 * NFS cookie mappings.
 * The mappings are stored in a list headed
 * by n_cookies, as required.
 * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
 * stored in increasing logical offset byte order.
 */
#define NFSNUMCOOKIES		31

struct nfsdmap {
	LIST_ENTRY(nfsdmap)	ndm_list;
	int			ndm_eocookie;
	nfsuint64		ndm_cookies[NFSNUMCOOKIES];
};

/*
 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity
 * is purely coincidental.
 * There is a unique nfsnode allocated for each active file,
 * each current directory, each mounted-on file, text file, and the root.
 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
 * type definitions), file handles of > 32 bytes should probably be split out
 * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
 * changing the definition in sys/mount.h of NFS_SMALLFH.)
 * NB: Hopefully the current order of the fields is such that everything will
 *     be well aligned and, therefore, tightly packed.
 */
struct nfsnode {
	LIST_ENTRY(nfsnode)	n_hash;		/* Hash chain */
	CIRCLEQ_ENTRY(nfsnode)	n_timer;	/* Nqnfs timer chain */
	u_quad_t		n_size;		/* Current size of file */
	u_quad_t		n_brev;		/* Modify rev when cached */
	u_quad_t		n_lrev;		/* Modify rev for lease */
	struct vattr		n_vattr;	/* Vnode attribute cache */
	time_t			n_attrstamp;	/* Attr. cache timestamp */
        u_int32_t               n_mode;         /* ACCESS mode cache */
        uid_t                   n_modeuid;      /* credentials having mode */
        time_t                  n_modestamp;    /* mode cache timestamp */
	time_t			n_mtime;	/* Prev modify time. */
	time_t			n_ctime;	/* Prev create time. */
	time_t			n_expiry;	/* Lease expiry time */
	nfsfh_t			*n_fhp;		/* NFS File Handle */
	struct vnode		*n_vnode;	/* associated vnode */
	struct lockf		*n_lockf;	/* Locking record of file */
	int			n_error;	/* Save write error value */
	union {
		struct timespec	nf_atim;	/* Special file times */
		nfsuint64	nd_cookieverf;	/* Cookie verifier (dir only) */
	} n_un1;
	union {
		struct timespec	nf_mtim;
		off_t		nd_direof;	/* Dir. EOF offset cache */
	} n_un2;
	union {
		struct sillyrename *nf_silly;	/* Ptr to silly rename struct */
		LIST_HEAD(, nfsdmap) nd_cook;	/* cookies */
	} n_un3;
	short			n_fhsize;	/* size in bytes, of fh */
	short			n_flag;		/* Flag for locking.. */
	nfsfh_t			n_fh;		/* Small File Handle */
};

#define n_atim		n_un1.nf_atim
#define n_mtim		n_un2.nf_mtim
#define n_sillyrename	n_un3.nf_silly
#define n_cookieverf	n_un1.nd_cookieverf
#define n_direofoffset	n_un2.nd_direof
#define n_cookies	n_un3.nd_cook

/*
 * Flags for n_flag
 */
#define	NFLUSHWANT	0x0001	/* Want wakeup from a flush in prog. */
#define	NFLUSHINPROG	0x0002	/* Avoid multiple calls to vinvalbuf() */
#define	NMODIFIED	0x0004	/* Might have a modified buffer in bio */
#define	NWRITEERR	0x0008	/* Flag write errors so close will know */
#define	NQNFSNONCACHE	0x0020	/* Non-cachable lease */
#define	NQNFSWRITE	0x0040	/* Write lease */
#define	NQNFSEVICTED	0x0080	/* Has been evicted */
#define	NACC		0x0100	/* Special file accessed */
#define	NUPD		0x0200	/* Special file updated */
#define	NCHG		0x0400	/* Special file times changed */
#define NLOCKED		0x0800  /* node is locked */
#define NWANTED		0x0100  /* someone wants to lock */

/*
 * Convert between nfsnode pointers and vnode pointers
 */
#define VTONFS(vp)	((struct nfsnode *)(vp)->v_data)
#define NFSTOV(np)	((struct vnode *)(np)->n_vnode)

/*
 * Queue head for nfsiod's
 */
extern TAILQ_HEAD(nfs_bufq, buf) nfs_bufq;
extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];

#if defined(KERNEL)
typedef int     vop_t __P((void *));
extern	vop_t	**fifo_nfsv2nodeop_p;
extern	vop_t	**nfsv2_vnodeop_p;
extern	vop_t	**spec_nfsv2nodeop_p;

/*
 * Prototypes for NFS vnode operations
 */
int	nfs_write __P((struct vop_write_args *));
#define	nfs_lease_check ((int (*) __P((struct  vop_lease_args *)))nullop)
#define nqnfs_vop_lease_check	lease_check
int	nqnfs_vop_lease_check __P((struct vop_lease_args *));
#define nfs_revoke vop_revoke
#define nfs_seek ((int (*) __P((struct  vop_seek_args *)))nullop)
int	nfs_abortop __P((struct vop_abortop_args *));
int	nfs_inactive __P((struct vop_inactive_args *));
int	nfs_reclaim __P((struct vop_reclaim_args *));
#define nfs_lock ((int (*) __P((struct vop_lock_args *)))vop_nolock)
#define nfs_unlock ((int (*) __P((struct vop_unlock_args *)))vop_nounlock)
#define nfs_islocked ((int (*) __P((struct vop_islocked_args *)))vop_noislocked)
#define nfs_reallocblks \
	((int (*) __P((struct  vop_reallocblks_args *)))eopnotsupp)

/* other stuff */
int	nfs_removeit __P((struct sillyrename *));
int	nfs_nget __P((struct mount *,nfsfh_t *,int,struct nfsnode **));
nfsuint64 *nfs_getcookie __P((struct nfsnode *, off_t, int));
void nfs_invaldir __P((struct vnode *));

#define nqnfs_lease_updatetime	lease_updatetime

#endif /* KERNEL */

#endif
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*
	24	* Copyright (c) 1989, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* This code is derived from software contributed to Berkeley by
	28	* Rick Macklem at The University of Guelph.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by the University of
	41	* California, Berkeley and its contributors.
	42	* 4. Neither the name of the University nor the names of its contributors
	43	* may be used to endorse or promote products derived from this software
	44	* without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	47	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	49	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	50	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	51	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	52	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	53	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	54	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	*
	58	* @(#)nfsnode.h 8.9 (Berkeley) 5/14/95
	59	* FreeBSD-Id: nfsnode.h,v 1.24 1997/10/28 14:06:25 bde Exp $
	60	*/
	61
	62
	63	#ifndef _NFS_NFSNODE_H_
	64	#define _NFS_NFSNODE_H_
65
66	#ifndef _NFS_NFS_H_
67	#include <nfs/nfs.h>
68	#endif
69
70	/*
71	* Silly rename structure that hangs off the nfsnode until the name
72	* can be removed by nfs_inactive()
73	*/
74	struct sillyrename {
75	struct ucred *s_cred;
76	struct vnode *s_dvp;
77	long s_namlen;
78	char s_name[20];
79	};
80
81	/*
82	* This structure is used to save the logical directory offset to
83	* NFS cookie mappings.
84	* The mappings are stored in a list headed
85	* by n_cookies, as required.
86	* There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
87	* stored in increasing logical offset byte order.
88	*/
89	#define NFSNUMCOOKIES 31
90
91	struct nfsdmap {
92	LIST_ENTRY(nfsdmap) ndm_list;
93	int ndm_eocookie;
94	nfsuint64 ndm_cookies[NFSNUMCOOKIES];
95	};
96
97	/*
98	* The nfsnode is the nfs equivalent to ufs's inode. Any similarity
99	* is purely coincidental.
100	* There is a unique nfsnode allocated for each active file,
101	* each current directory, each mounted-on file, text file, and the root.
102	* An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
103	* If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
104	* type definitions), file handles of > 32 bytes should probably be split out
105	* into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
106	* changing the definition in sys/mount.h of NFS_SMALLFH.)
107	* NB: Hopefully the current order of the fields is such that everything will
108	* be well aligned and, therefore, tightly packed.
109	*/
110	struct nfsnode {
111	LIST_ENTRY(nfsnode) n_hash; /* Hash chain */
112	CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */
113	u_quad_t n_size; /* Current size of file */
114	u_quad_t n_brev; /* Modify rev when cached */
115	u_quad_t n_lrev; /* Modify rev for lease */
116	struct vattr n_vattr; /* Vnode attribute cache */
117	time_t n_attrstamp; /* Attr. cache timestamp */
118	u_int32_t n_mode; /* ACCESS mode cache */
119	uid_t n_modeuid; /* credentials having mode */
120	time_t n_modestamp; /* mode cache timestamp */
121	time_t n_mtime; /* Prev modify time. */
122	time_t n_ctime; /* Prev create time. */
123	time_t n_expiry; /* Lease expiry time */
124	nfsfh_t n_fhp; / NFS File Handle */
125	struct vnode n_vnode; / associated vnode */
126	struct lockf n_lockf; / Locking record of file */
127	int n_error; /* Save write error value */
128	union {
129	struct timespec nf_atim; /* Special file times */
130	nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
131	} n_un1;
132	union {
133	struct timespec nf_mtim;
134	off_t nd_direof; /* Dir. EOF offset cache */
135	} n_un2;
136	union {
137	struct sillyrename nf_silly; / Ptr to silly rename struct */
138	LIST_HEAD(, nfsdmap) nd_cook; /* cookies */
139	} n_un3;
140	short n_fhsize; /* size in bytes, of fh */
141	short n_flag; /* Flag for locking.. */
142	nfsfh_t n_fh; /* Small File Handle */
143	};
144
145	#define n_atim n_un1.nf_atim
146	#define n_mtim n_un2.nf_mtim
147	#define n_sillyrename n_un3.nf_silly
148	#define n_cookieverf n_un1.nd_cookieverf
149	#define n_direofoffset n_un2.nd_direof
150	#define n_cookies n_un3.nd_cook
151
152	/*
153	* Flags for n_flag
154	*/
155	#define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */
156	#define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */
157	#define NMODIFIED 0x0004 /* Might have a modified buffer in bio */
158	#define NWRITEERR 0x0008 /* Flag write errors so close will know */
159	#define NQNFSNONCACHE 0x0020 /* Non-cachable lease */
160	#define NQNFSWRITE 0x0040 /* Write lease */
161	#define NQNFSEVICTED 0x0080 /* Has been evicted */
162	#define NACC 0x0100 /* Special file accessed */
163	#define NUPD 0x0200 /* Special file updated */
164	#define NCHG 0x0400 /* Special file times changed */
165	#define NLOCKED 0x0800 /* node is locked */
166	#define NWANTED 0x0100 /* someone wants to lock */
167
168	/*
169	* Convert between nfsnode pointers and vnode pointers
170	*/
171	#define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
172	#define NFSTOV(np) ((struct vnode *)(np)->n_vnode)
173
174	/*
175	* Queue head for nfsiod's
176	*/
177	extern TAILQ_HEAD(nfs_bufq, buf) nfs_bufq;
178	extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
179	extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
180
181	#if defined(KERNEL)
182	typedef int vop_t __P((void *));
183	extern vop_t **fifo_nfsv2nodeop_p;
184	extern vop_t **nfsv2_vnodeop_p;
185	extern vop_t **spec_nfsv2nodeop_p;
186
187	/*
188	* Prototypes for NFS vnode operations
189	*/
190	int nfs_write __P((struct vop_write_args *));
191	#define nfs_lease_check ((int () __P((struct vop_lease_args )))nullop)
192	#define nqnfs_vop_lease_check lease_check
193	int nqnfs_vop_lease_check __P((struct vop_lease_args *));
194	#define nfs_revoke vop_revoke
195	#define nfs_seek ((int () __P((struct vop_seek_args )))nullop)
196	int nfs_abortop __P((struct vop_abortop_args *));
197	int nfs_inactive __P((struct vop_inactive_args *));
198	int nfs_reclaim __P((struct vop_reclaim_args *));
199	#define nfs_lock ((int () __P((struct vop_lock_args )))vop_nolock)
200	#define nfs_unlock ((int () __P((struct vop_unlock_args )))vop_nounlock)
201	#define nfs_islocked ((int () __P((struct vop_islocked_args )))vop_noislocked)
202	#define nfs_reallocblks \
203	((int () __P((struct vop_reallocblks_args )))eopnotsupp)
204
205	/* other stuff */
206	int nfs_removeit __P((struct sillyrename *));
207	int nfs_nget __P((struct mount ,nfsfh_t ,int,struct nfsnode **));
208	nfsuint64 nfs_getcookie __P((struct nfsnode , off_t, int));
209	void nfs_invaldir __P((struct vnode *));
210
211	#define nqnfs_lease_updatetime lease_updatetime
212
213	#endif /* KERNEL */
214
215	#endif