summaryrefslogtreecommitdiffstats
path: root/sys/nfsclient/nfs.h
blob: 1be86081b50943cd43f7fb7eaaeebb6e5d48aa0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
/*
 * Copyright (c) 1989, 1993, 1995
 *	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.
 *
 *	@(#)nfs.h	8.4 (Berkeley) 5/1/95
 * $FreeBSD$
 */

#ifndef _NFSCLIENT_NFS_H_
#define _NFSCLIENT_NFS_H_

#ifdef _KERNEL
#include "opt_nfs.h"
#endif

#include <nfsclient/nfsargs.h>

/*
 * Tunable constants for nfs
 */

#define NFS_TICKINTVL	5		/* Desired time for a tick (msec) */
#define NFS_HZ		(hz / nfs_ticks) /* Ticks/sec */
#define	NFS_TIMEO	(1 * NFS_HZ)	/* Default timeout = 1 second */
#define	NFS_MINTIMEO	(1 * NFS_HZ)	/* Min timeout to use */
#define	NFS_MAXTIMEO	(60 * NFS_HZ)	/* Max timeout to backoff to */
#define	NFS_MINIDEMTIMEO (5 * NFS_HZ)	/* Min timeout for non-idempotent ops*/
#define	NFS_MAXREXMIT	100		/* Stop counting after this many */
#define	NFS_RETRANS	10		/* Num of retrans for soft mounts */
#define	NFS_MAXGRPS	16		/* Max. size of groups list */
#ifndef NFS_MINATTRTIMO
#define	NFS_MINATTRTIMO 3		/* VREG attrib cache timeout in sec */
#endif
#ifndef NFS_MAXATTRTIMO
#define	NFS_MAXATTRTIMO 60
#endif
#ifndef NFS_MINDIRATTRTIMO
#define	NFS_MINDIRATTRTIMO 30		/* VDIR attrib cache timeout in sec */
#endif
#ifndef NFS_MAXDIRATTRTIMO
#define	NFS_MAXDIRATTRTIMO 60
#endif
#define	NFS_WSIZE	8192		/* Def. write data size <= 8192 */
#define	NFS_RSIZE	8192		/* Def. read data size <= 8192 */
#define NFS_READDIRSIZE	8192		/* Def. readdir size */
#define	NFS_DEFRAHEAD	1		/* Def. read ahead # blocks */
#define	NFS_MAXRAHEAD	4		/* Max. read ahead # blocks */
#define	NFS_MAXASYNCDAEMON 	64	/* Max. number async_daemons runnable */
#define	NFS_DIRBLKSIZ	4096		/* Must be a multiple of DIRBLKSIZ */
#ifdef _KERNEL
#define	DIRBLKSIZ	512		/* XXX we used to use ufs's DIRBLKSIZ */
#endif
#define NFS_MAXDEADTHRESH	9	/* How long till we say 'server not responding' */

/*
 * Oddballs
 */
#define NFS_CMPFH(n, f, s) \
	((n)->n_fhsize == (s) && !bcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))
#define NFS_ISV3(v)	(VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)

#define NFSSTA_HASWRITEVERF	0x00040000  /* Has write verifier for V3 */
#define NFSSTA_GOTFSINFO	0x00100000  /* Got the V3 fsinfo */
#define	NFSSTA_SNDLOCK		0x01000000  /* Send socket lock */
#define	NFSSTA_WANTSND		0x02000000  /* Want above */
#define	NFSSTA_RCVLOCK		0x04000000  /* Rcv socket lock */
#define	NFSSTA_WANTRCV		0x08000000  /* Want above */

/*
 * XXX to allow amd to include nfs.h without nfsproto.h
 */
#ifdef NFS_NPROCS
#include <nfsclient/nfsstats.h>
#endif
/*
 * Flags for nfsclnt() system call.
 */
#define	NFSCLNT_LOCKDANS 0x200

/*
 * vfs.nfs sysctl(3) identifiers
 */
#define NFS_NFSSTATS	1		/* struct: struct nfsstats */

#ifdef _KERNEL

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_NFSREQ);
MALLOC_DECLARE(M_NFSDIROFF);
MALLOC_DECLARE(M_NFSBIGFH);
MALLOC_DECLARE(M_NFSHASH);
#endif

extern uma_zone_t nfsmount_zone;

extern struct callout_handle nfs_timer_handle;
extern struct nfsstats nfsstats;

extern int nfs_numasync;
extern int nfs_pbuf_freecnt;
extern int nfs_ticks;

/* Data constants in XDR form */
extern u_int32_t nfs_true, nfs_false, nfs_xdrneg1;
extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers;
extern u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr;

extern int nfsv3_procid[NFS_NPROCS];

struct uio;
struct buf;
struct vattr;
struct nameidata;

/*
 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
 * What should be in this set is open to debate, but I believe that since
 * I/O system calls on ufs are never interrupted by signals the set should
 * be minimal. My reasoning is that many current programs that use signals
 * such as SIGALRM will not expect file I/O system calls to be interrupted
 * by them and break.
 */
#define	NFSINT_SIGMASK(set) 						\
	(SIGISMEMBER(set, SIGINT) || SIGISMEMBER(set, SIGTERM) ||	\
	 SIGISMEMBER(set, SIGHUP) || SIGISMEMBER(set, SIGKILL) ||	\
	 SIGISMEMBER(set, SIGQUIT))

/*
 * Socket errors ignored for connectionless sockets??
 * For now, ignore them all
 */
#define	NFSIGNORE_SOERROR(s, e) \
		((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
		((s) & PR_CONNREQUIRED) == 0)

/*
 * Nfs outstanding request list element
 */
struct nfsreq {
	TAILQ_ENTRY(nfsreq) r_chain;
	struct mbuf	*r_mreq;
	struct mbuf	*r_mrep;
	struct mbuf	*r_md;
	caddr_t		r_dpos;
	struct nfsmount *r_nmp;
	struct vnode	*r_vp;
	u_int32_t	r_xid;
	int		r_flags;	/* flags on request, see below */
	int		r_retry;	/* max retransmission count */
	int		r_rexmit;	/* current retrans count */
	int		r_timer;	/* tick counter on reply */
	u_int32_t	r_procnum;	/* NFS procedure number */
	int		r_rtt;		/* RTT for rpc */
	struct thread	*r_td;		/* Proc that did I/O system call */
};

/*
 * Queue head for nfsreq's
 */
extern TAILQ_HEAD(nfs_reqq, nfsreq) nfs_reqq;

/* Flag values for r_flags */
#define R_TIMING	0x01		/* timing request (in mntp) */
#define R_SENT		0x02		/* request has been sent */
#define	R_SOFTTERM	0x04		/* soft mnt, too many retries */
#define	R_INTR		0x08		/* intr mnt, signal pending */
#define	R_SOCKERR	0x10		/* Fatal error on socket */
#define	R_TPRINTFMSG	0x20		/* Did a tprintf msg. */
#define	R_MUSTRESEND	0x40		/* Must resend request */
#define	R_GETONEREP	0x80		/* Probe for one reply only */

extern struct nfsnodehashhead *nfsnodehashtbl;
extern u_long	nfsnodehash;

#define	NFSNOHASH(fhsum) \
	(&nfsnodehashtbl[(fhsum) & nfsnodehash])

/*
 * Defines for WebNFS
 */

#define WEBNFS_ESC_CHAR		'%'
#define WEBNFS_SPECCHAR_START	0x80

#define WEBNFS_NATIVE_CHAR	0x80
/*
 * ..
 * Possibly more here in the future.
 */

/*
 * Macro for converting escape characters in WebNFS pathnames.
 * Should really be in libkern.
 */

#define HEXTOC(c) \
	((c) >= 'a' ? ((c) - ('a' - 10)) : \
	    ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
#define HEXSTRTOI(p) \
	((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))

#ifdef NFS_DEBUG

extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO	1 /* asynchronous i/o */
#define NFS_DEBUG_WG		2 /* server write gathering */
#define NFS_DEBUG_RC		4 /* server request caching */

#define NFS_DPF(cat, args)					\
	do {							\
		if (nfs_debug & NFS_DEBUG_##cat) printf args;	\
	} while (0)

#else

#define NFS_DPF(cat, args)

#endif

int	nfs_init(struct vfsconf *vfsp);
int	nfs_uninit(struct vfsconf *vfsp);
int	nfs_mountroot(struct mount *mp, struct thread *td);
int	nfs_send(struct socket *, struct sockaddr *, struct mbuf *,
	    struct nfsreq *);
int	nfs_sndlock(struct nfsreq *);
void	nfs_sndunlock(struct nfsreq *);
int	nfs_vinvalbuf(struct vnode *, int, struct ucred *, struct thread *,
	    int);
int	nfs_readrpc(struct vnode *, struct uio *, struct ucred *);
int	nfs_writerpc(struct vnode *, struct uio *, struct ucred *, int *,
	    int *);
int	nfs_commit(struct vnode *vp, u_quad_t offset, int cnt,
	    struct ucred *cred, struct thread *td);
int	nfs_readdirrpc(struct vnode *, struct uio *, struct ucred *);
int	nfs_nfsiodnew(void);
int	nfs_asyncio(struct buf *, struct ucred *, struct thread *);
int	nfs_doio(struct buf *, struct ucred *, struct thread *);
int	nfs_readlinkrpc(struct vnode *, struct uio *, struct ucred *);
int	nfs_sigintr(struct nfsmount *, struct nfsreq *, struct thread *);
int	nfs_readdirplusrpc(struct vnode *, struct uio *, struct ucred *);
int	nfs_request(struct vnode *, struct mbuf *, int, struct thread *,
	    struct ucred *, struct mbuf **, struct mbuf **, caddr_t *);
int	nfs_loadattrcache(struct vnode **, struct mbuf **, caddr_t *,
	    struct vattr *, int);
int	nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *);
void	nfs_nhinit(void);
int	nfs_nmcancelreqs(struct nfsmount *);
void	nfs_timer(void*);
int	nfs_connect(struct nfsmount *, struct nfsreq *);
void	nfs_disconnect(struct nfsmount *);
void	nfs_safedisconnect(struct nfsmount *);
int	nfs_getattrcache(struct vnode *, struct vattr *);
int	nfsm_strtmbuf(struct mbuf **, char **, const char *, long);
int	nfs_bioread(struct vnode *, struct uio *, int, struct ucred *);
int	nfsm_uiotombuf(struct uio *, struct mbuf **, int, caddr_t *);
void	nfs_clearcommit(struct mount *);
int	nfs_writebp(struct buf *, int, struct thread *);
int	nfs_fsinfo(struct nfsmount *, struct vnode *, struct ucred *,
	    struct thread *);
int	nfs_meta_setsize (struct vnode *, struct ucred *,
	    struct thread *, u_quad_t);

#endif	/* _KERNEL */

#endif
OpenPOWER on IntegriCloud