Annotation of sys/nfs/nfsnode.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: nfsnode.h,v 1.26 2007/06/21 22:59:49 thib Exp $ */
2: /* $NetBSD: nfsnode.h,v 1.16 1996/02/18 11:54:04 fvdl Exp $ */
3:
4: /*
5: * Copyright (c) 1989, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Rick Macklem at The University of Guelph.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95
36: */
37:
38:
39: #ifndef _NFS_NFSNODE_H_
40: #define _NFS_NFSNODE_H_
41:
42: #ifndef _NFS_NFS_H_
43: #include <nfs/nfs.h>
44: #endif
45:
46: #include <sys/rwlock.h>
47:
48: /*
49: * Silly rename structure that hangs off the nfsnode until the name
50: * can be removed by nfs_inactive()
51: */
52: struct sillyrename {
53: struct ucred *s_cred;
54: struct vnode *s_dvp;
55: long s_namlen;
56: char s_name[20];
57: };
58:
59: /*
60: * This structure is used to save the logical directory offset to
61: * NFS cookie mappings.
62: * The mappings are stored in a list headed
63: * by n_cookies, as required.
64: * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
65: * stored in increasing logical offset byte order.
66: */
67: #define NFSNUMCOOKIES 31
68:
69: struct nfsdmap {
70: LIST_ENTRY(nfsdmap) ndm_list;
71: int ndm_eocookie;
72: nfsuint64 ndm_cookies[NFSNUMCOOKIES];
73: };
74:
75: /*
76: * The nfsnode is the nfs equivalent to ufs's inode. Any similarity
77: * is purely coincidental.
78: * There is a unique nfsnode allocated for each active file,
79: * each current directory, each mounted-on file, text file, and the root.
80: * An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
81: * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
82: * type definitions), file handles of > 32 bytes should probably be split out
83: * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
84: * changing the definition in sys/mount.h of NFS_SMALLFH.)
85: * NB: Hopefully the current order of the fields is such that everything will
86: * be well aligned and, therefore, tightly packed.
87: */
88: struct nfsnode {
89: LIST_ENTRY(nfsnode) n_hash; /* Hash 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: time_t n_mtime; /* Prev modify time. */
96: time_t n_ctime; /* Prev create time. */
97: time_t n_expiry; /* Lease expiry time */
98: nfsfh_t *n_fhp; /* NFS File Handle */
99: struct vnode *n_vnode; /* associated vnode */
100: struct lockf *n_lockf; /* Locking record of file */
101: int n_error; /* Save write error value */
102: union {
103: struct timespec nf_atim; /* Special file times */
104: nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
105: } n_un1;
106: union {
107: struct timespec nf_mtim;
108: off_t nd_direof; /* Dir. EOF offset cache */
109: } n_un2;
110: union {
111: struct sillyrename *nf_silly; /* Ptr to silly rename struct */
112: LIST_HEAD(, nfsdmap) nd_cook; /* cookies */
113: } n_un3;
114: short n_fhsize; /* size in bytes, of fh */
115: short n_flag; /* Flag for locking.. */
116: nfsfh_t n_fh; /* Small File Handle */
117: struct ucred *n_rcred;
118: struct ucred *n_wcred;
119:
120: off_t n_pushedlo; /* 1st blk in commited range */
121: off_t n_pushedhi; /* Last block in range */
122: off_t n_pushlo; /* 1st block in commit range */
123: off_t n_pushhi; /* Last block in range */
124: struct rwlock n_commitlock; /* Serialize commits */
125: int n_commitflags;
126: };
127:
128: /*
129: * Values for n_commitflags
130: */
131: #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */
132: #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */
133:
134: #define n_atim n_un1.nf_atim
135: #define n_mtim n_un2.nf_mtim
136: #define n_sillyrename n_un3.nf_silly
137: #define n_cookieverf n_un1.nd_cookieverf
138: #define n_direofoffset n_un2.nd_direof
139: #define n_cookies n_un3.nd_cook
140:
141: /*
142: * Flags for n_flag
143: */
144: #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */
145: #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */
146: #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */
147: #define NWRITEERR 0x0008 /* Flag write errors so close will know */
148: #define NACC 0x0100 /* Special file accessed */
149: #define NUPD 0x0200 /* Special file updated */
150: #define NCHG 0x0400 /* Special file times changed */
151:
152: /*
153: * Convert between nfsnode pointers and vnode pointers
154: */
155: #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
156: #define NFSTOV(np) ((np)->n_vnode)
157:
158: /*
159: * Queue head for nfsiod's
160: */
161: extern TAILQ_HEAD(nfs_bufqhead, buf) nfs_bufq;
162:
163: #endif /* _NFS_NFSNODE_H_ */
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