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1.1 root 1: /*
2: * Copyright (c) 1989 The Regents of the University of California.
3: * 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 7.12 (Berkeley) 4/16/91
37: */
38:
39: /*
40: * The nfsnode is the nfs equivalent to ufs's inode. Any similarity
41: * is purely coincidental.
42: * There is a unique nfsnode allocated for each active file,
43: * each current directory, each mounted-on file, text file, and the root.
44: * An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
45: */
46:
47: struct nfsnode {
48: struct nfsnode *n_chain[2]; /* must be first */
49: nfsv2fh_t n_fh; /* NFS File Handle */
50: long n_flag; /* Flag for locking.. */
51: struct vnode *n_vnode; /* vnode associated with this nfsnode */
52: time_t n_attrstamp; /* Time stamp (sec) for attributes */
53: struct vattr n_vattr; /* Vnode attribute cache */
54: struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */
55: u_long n_size; /* Current size of file */
56: time_t n_mtime; /* Prev modify time to maintain data cache consistency*/
57: time_t n_ctime; /* Prev create time for name cache consistency*/
58: int n_error; /* Save write error value */
59: pid_t n_lockholder; /* holder of nfsnode lock */
60: pid_t n_lockwaiter; /* most recent waiter for nfsnode lock */
61: u_long n_direofoffset; /* Dir. EOF offset cache */
62: };
63:
64: #define n_forw n_chain[0]
65: #define n_back n_chain[1]
66:
67: #ifdef KERNEL
68: /*
69: * Convert between nfsnode pointers and vnode pointers
70: */
71: #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
72: #define NFSTOV(np) ((struct vnode *)(np)->n_vnode)
73: #endif
74: /*
75: * Flags for n_flag
76: */
77: #define NLOCKED 0x1 /* Lock the node for other local accesses */
78: #define NWANT 0x2 /* Want above lock */
79: #define NMODIFIED 0x4 /* Might have a modified buffer in bio */
80: #define NWRITEERR 0x8 /* Flag write errors so close will know */
81:
82: /*
83: * Prototypes for NFS vnode operations
84: */
85: int nfs_lookup __P((
86: struct vnode *vp,
87: struct nameidata *ndp,
88: struct proc *p));
89: int nfs_create __P((
90: struct nameidata *ndp,
91: struct vattr *vap,
92: struct proc *p));
93: int nfs_mknod __P((
94: struct nameidata *ndp,
95: struct vattr *vap,
96: struct ucred *cred,
97: struct proc *p));
98: int nfs_open __P((
99: struct vnode *vp,
100: int mode,
101: struct ucred *cred,
102: struct proc *p));
103: int nfs_close __P((
104: struct vnode *vp,
105: int fflag,
106: struct ucred *cred,
107: struct proc *p));
108: int nfs_access __P((
109: struct vnode *vp,
110: int mode,
111: struct ucred *cred,
112: struct proc *p));
113: int nfs_getattr __P((
114: struct vnode *vp,
115: struct vattr *vap,
116: struct ucred *cred,
117: struct proc *p));
118: int nfs_setattr __P((
119: struct vnode *vp,
120: struct vattr *vap,
121: struct ucred *cred,
122: struct proc *p));
123: int nfs_read __P((
124: struct vnode *vp,
125: struct uio *uio,
126: int ioflag,
127: struct ucred *cred));
128: int nfs_write __P((
129: struct vnode *vp,
130: struct uio *uio,
131: int ioflag,
132: struct ucred *cred));
133: #define nfs_ioctl ((int (*) __P(( \
134: struct vnode *vp, \
135: int command, \
136: caddr_t data, \
137: int fflag, \
138: struct ucred *cred, \
139: struct proc *p))) enoioctl)
140: #define nfs_select ((int (*) __P(( \
141: struct vnode *vp, \
142: int which, \
143: int fflags, \
144: struct ucred *cred, \
145: struct proc *p))) seltrue)
146: int nfs_mmap __P((
147: struct vnode *vp,
148: int fflags,
149: struct ucred *cred,
150: struct proc *p));
151: int nfs_fsync __P((
152: struct vnode *vp,
153: int fflags,
154: struct ucred *cred,
155: int waitfor,
156: struct proc *p));
157: #define nfs_seek ((int (*) __P(( \
158: struct vnode *vp, \
159: off_t oldoff, \
160: off_t newoff, \
161: struct ucred *cred))) nullop)
162: int nfs_remove __P((
163: struct nameidata *ndp,
164: struct proc *p));
165: int nfs_link __P((
166: struct vnode *vp,
167: struct nameidata *ndp,
168: struct proc *p));
169: int nfs_rename __P((
170: struct nameidata *fndp,
171: struct nameidata *tdnp,
172: struct proc *p));
173: int nfs_mkdir __P((
174: struct nameidata *ndp,
175: struct vattr *vap,
176: struct proc *p));
177: int nfs_rmdir __P((
178: struct nameidata *ndp,
179: struct proc *p));
180: int nfs_symlink __P((
181: struct nameidata *ndp,
182: struct vattr *vap,
183: char *target,
184: struct proc *p));
185: int nfs_readdir __P((
186: struct vnode *vp,
187: struct uio *uio,
188: struct ucred *cred,
189: int *eofflagp));
190: int nfs_readlink __P((
191: struct vnode *vp,
192: struct uio *uio,
193: struct ucred *cred));
194: int nfs_abortop __P((
195: struct nameidata *ndp));
196: int nfs_inactive __P((
197: struct vnode *vp,
198: struct proc *p));
199: int nfs_reclaim __P((
200: struct vnode *vp));
201: int nfs_lock __P((
202: struct vnode *vp));
203: int nfs_unlock __P((
204: struct vnode *vp));
205: int nfs_bmap __P((
206: struct vnode *vp,
207: daddr_t bn,
208: struct vnode **vpp,
209: daddr_t *bnp));
210: int nfs_strategy __P((
211: struct buf *bp));
212: int nfs_print __P((
213: struct vnode *vp));
214: int nfs_islocked __P((
215: struct vnode *vp));
216: int nfs_advlock __P((
217: struct vnode *vp,
218: caddr_t id,
219: int op,
220: struct flock *fl,
221: int flags));
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