projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a2907882 KM |
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 are permitted | |
| 9 | * provided that the above copyright notice and this paragraph are | |
| 10 | * duplicated in all such forms and that any documentation, | |
| 11 | * advertising materials, and other materials related to such | |
| 12 | * distribution and use acknowledge that the software was developed | |
| 13 | * by the University of California, Berkeley. The name of the | |
| 14 | * University may not be used to endorse or promote products derived | |
| 15 | * from this software without specific prior written permission. | |
| 16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 19 | * | |
| 9238aa59 | 20 | * @(#)nfsnode.h 7.2 (Berkeley) %G% |
| a2907882 KM |
21 | */ |
| 22 | ||
| 23 | /* | |
| 24 | * The nfsnode is the nfs equivalent to ufs's inode. Any similarity | |
| 25 | * is purely coincidental. | |
| 26 | * There is a unique nfsnode allocated for each active file, | |
| 27 | * each current directory, each mounted-on file, text file, and the root. | |
| 28 | * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) | |
| 29 | */ | |
| 30 | ||
| 31 | struct nfsnode { | |
| 32 | struct nfsnode *n_chain[2]; /* must be first */ | |
| 33 | nfsv2fh_t n_fh; /* NFS File Handle */ | |
| 34 | long n_flag; /* Flag for locking.. */ | |
| 35 | long n_id; /* unique identifier */ | |
| 36 | struct vnode n_vnode; /* vnode associated with this nfsnode */ | |
| 37 | long n_attrstamp; /* Time stamp (sec) for attributes */ | |
| 38 | struct vattr n_vattr; /* Vnode attribute cache */ | |
| 39 | struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */ | |
| 40 | struct nfsnode *n_freef; /* free list forward */ | |
| 41 | struct nfsnode **n_freeb; /* free list back */ | |
| 9238aa59 RM |
42 | daddr_t n_lastr; /* Last block read for read ahead */ |
| 43 | u_long n_size; /* Current size of file */ | |
| 44 | time_t n_mtime; /* Prev modify time to maintain data cache consistency*/ | |
| a2907882 KM |
45 | }; |
| 46 | ||
| 47 | #define n_forw n_chain[0] | |
| 48 | #define n_back n_chain[1] | |
| 49 | ||
| 50 | #ifdef KERNEL | |
| 51 | struct nfsnode *nfsnode; /* the nfsnode table itself */ | |
| 52 | struct nfsnode *nfsnodeNNFSNODE; /* the end of the nfsnode table */ | |
| 53 | int nnfsnode; /* number of slots in the table */ | |
| 54 | long nextnfsnodeid; /* unique id generator */ | |
| 55 | ||
| 56 | extern struct vnodeops nfsv2_vnodeops; /* vnode operations for nfsv2 */ | |
| 57 | extern struct vnodeops nfsv2chr_vnodeops; /* vnode operations for chr devices */ | |
| 58 | ||
| 59 | /* | |
| 60 | * Convert between nfsnode pointers and vnode pointers | |
| 61 | */ | |
| 62 | #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) | |
| 63 | #define NFSTOV(np) ((struct vnode *)&(np)->n_vnode) | |
| 64 | #endif | |
| 65 | /* | |
| 66 | * Flags for n_flag | |
| 67 | */ | |
| 68 | #define NLOCKED 0x1 | |
| 69 | #define NWANT 0x2 | |
| 9238aa59 | 70 | #define NMODIFIED 0x4 |