FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfsnode.h
1 /*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)nfsnode.h 8.4 (Berkeley) 2/13/94
37 * $FreeBSD: src/sys/nfs/nfsnode.h,v 1.15.4.4 1999/09/05 08:19:51 peter Exp $
38 */
39
40 #ifndef _NFS_NFSNODE_H_
41 #define _NFS_NFSNODE_H_
42
43 #ifndef _NFS_NFS_H_
44 #include <nfs/nfs.h>
45 #endif
46
47 /*
48 * Silly rename structure that hangs off the nfsnode until the name
49 * can be removed by nfs_inactive()
50 */
51 struct sillyrename {
52 struct ucred *s_cred;
53 struct vnode *s_dvp;
54 long s_namlen;
55 char s_name[20];
56 };
57
58 /*
59 * This structure is used to save the logical directory offset to
60 * NFS cookie mappings.
61 * The mappings are stored in a list headed
62 * by n_cookies, as required.
63 * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
64 * stored in increasing logical offset byte order.
65 */
66 #define NFSNUMCOOKIES 31
67
68 struct nfsdmap {
69 LIST_ENTRY(nfsdmap) ndm_list;
70 int ndm_eocookie;
71 nfsuint64 ndm_cookies[NFSNUMCOOKIES];
72 };
73
74 /*
75 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity
76 * is purely coincidental.
77 * There is a unique nfsnode allocated for each active file,
78 * each current directory, each mounted-on file, text file, and the root.
79 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
80 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
81 * type definitions), file handles of > 32 bytes should probably be split out
82 * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
83 * changing the definition in sys/mount.h of NFS_SMALLFH.)
84 * NB: Hopefully the current order of the fields is such that everything will
85 * be well aligned and, therefore, tightly packed.
86 */
87 struct nfsnode {
88 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */
89 CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */
90 u_quad_t n_size; /* Current size of file */
91 u_quad_t n_brev; /* Modify rev when cached */
92 u_quad_t n_lrev; /* Modify rev for lease */
93 struct vattr n_vattr; /* Vnode attribute cache */
94 time_t n_attrstamp; /* Attr. cache timestamp */
95 u_int32_t n_mode; /* ACCESS mode cache */
96 uid_t n_modeuid; /* credentials having mode */
97 time_t n_modestamp; /* mode cache timestamp */
98 time_t n_mtime; /* Prev modify time. */
99 time_t n_ctime; /* Prev create time. */
100 time_t n_expiry; /* Lease expiry time */
101 nfsfh_t *n_fhp; /* NFS File Handle */
102 struct vnode *n_vnode; /* associated vnode */
103 struct lockf *n_lockf; /* Locking record of file */
104 int n_error; /* Save write error value */
105 union {
106 struct timespec nf_atim; /* Special file times */
107 nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
108 } n_un1;
109 union {
110 struct timespec nf_mtim;
111 off_t nd_direof; /* Dir. EOF offset cache */
112 } n_un2;
113 union {
114 struct sillyrename *nf_silly; /* Ptr to silly rename struct */
115 LIST_HEAD(, nfsdmap) nd_cook; /* cookies */
116 } n_un3;
117 short n_fhsize; /* size in bytes, of fh */
118 short n_flag; /* Flag for locking.. */
119 nfsfh_t n_fh; /* Small File Handle */
120 };
121
122 #define n_atim n_un1.nf_atim
123 #define n_mtim n_un2.nf_mtim
124 #define n_sillyrename n_un3.nf_silly
125 #define n_cookieverf n_un1.nd_cookieverf
126 #define n_direofoffset n_un2.nd_direof
127 #define n_cookies n_un3.nd_cook
128
129 /*
130 * Flags for n_flag
131 */
132 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */
133 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */
134 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */
135 #define NWRITEERR 0x0008 /* Flag write errors so close will know */
136 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */
137 #define NQNFSWRITE 0x0040 /* Write lease */
138 #define NQNFSEVICTED 0x0080 /* Has been evicted */
139 #define NACC 0x0100 /* Special file accessed */
140 #define NUPD 0x0200 /* Special file updated */
141 #define NCHG 0x0400 /* Special file times changed */
142 #define NLOCKED 0x0800 /* node is locked */
143 #define NWANTED 0x0100 /* someone wants to lock */
144
145 /*
146 * Convert between nfsnode pointers and vnode pointers
147 */
148 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
149 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode)
150
151 /*
152 * Queue head for nfsiod's
153 */
154 extern TAILQ_HEAD(nfs_bufq, buf) nfs_bufq;
155 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
156 extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
157
158 #if defined(KERNEL) || defined(_KERNEL)
159 extern vop_t **fifo_nfsv2nodeop_p;
160 extern vop_t **nfsv2_vnodeop_p;
161 extern vop_t **spec_nfsv2nodeop_p;
162
163 /*
164 * Prototypes for NFS vnode operations
165 */
166 int nfs_getpages __P((struct vop_getpages_args *));
167 int nfs_write __P((struct vop_write_args *));
168 #ifdef HAS_VOPLEASE
169 #define nfs_lease_check ((int (*) __P((struct vop_lease_args *)))nullop)
170 #define nqnfs_vop_lease_check lease_check
171 #else
172 #ifdef __FreeBSD__
173 #define nqnfs_lease_check nfs_lease_check
174 #else
175 #define nqnfs_lease_check lease_check
176 #endif
177 #endif
178 #ifdef HAS_VOPREVOKE
179 #define nfs_revoke vop_revoke
180 #endif
181 #define nfs_seek ((int (*) __P((struct vop_seek_args *)))nullop)
182 int nfs_abortop __P((struct vop_abortop_args *));
183 int nfs_inactive __P((struct vop_inactive_args *));
184 int nfs_reclaim __P((struct vop_reclaim_args *));
185 int nfs_lock __P((struct vop_lock_args *));
186 int nfs_unlock __P((struct vop_unlock_args *));
187 int nfs_islocked __P((struct vop_islocked_args *));
188 #define nfs_reallocblks \
189 ((int (*) __P((struct vop_reallocblks_args *)))eopnotsupp)
190
191 /* other stuff */
192 int nfs_removeit __P((struct sillyrename *));
193 int nfs_nget __P((struct mount *,nfsfh_t *,int,struct nfsnode **));
194 nfsuint64 *nfs_getcookie __P((struct nfsnode *, off_t, int));
195 void nfs_invaldir __P((struct vnode *));
196
197 #ifdef __FreeBSD__
198 #define nqnfs_lease_updatetime nfs_lease_updatetime
199 #else
200 #define nqnfs_lease_updatetime lease_updatetime
201 #endif
202
203 #endif /* KERNEL */
204
205 #endif
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