138414Smckusick /* 238414Smckusick * Copyright (c) 1989 The Regents of the University of California. 338414Smckusick * All rights reserved. 438414Smckusick * 538414Smckusick * This code is derived from software contributed to Berkeley by 638414Smckusick * Rick Macklem at The University of Guelph. 738414Smckusick * 838414Smckusick * Redistribution and use in source and binary forms are permitted 938414Smckusick * provided that the above copyright notice and this paragraph are 1038414Smckusick * duplicated in all such forms and that any documentation, 1138414Smckusick * advertising materials, and other materials related to such 1238414Smckusick * distribution and use acknowledge that the software was developed 1338414Smckusick * by the University of California, Berkeley. The name of the 1438414Smckusick * University may not be used to endorse or promote products derived 1538414Smckusick * from this software without specific prior written permission. 1638414Smckusick * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1738414Smckusick * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 1838414Smckusick * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1938414Smckusick * 20*38884Smacklem * @(#)nfsnode.h 7.2 (Berkeley) 08/30/89 2138414Smckusick */ 2238414Smckusick 2338414Smckusick /* 2438414Smckusick * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 2538414Smckusick * is purely coincidental. 2638414Smckusick * There is a unique nfsnode allocated for each active file, 2738414Smckusick * each current directory, each mounted-on file, text file, and the root. 2838414Smckusick * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 2938414Smckusick */ 3038414Smckusick 3138414Smckusick struct nfsnode { 3238414Smckusick struct nfsnode *n_chain[2]; /* must be first */ 3338414Smckusick nfsv2fh_t n_fh; /* NFS File Handle */ 3438414Smckusick long n_flag; /* Flag for locking.. */ 3538414Smckusick long n_id; /* unique identifier */ 3638414Smckusick struct vnode n_vnode; /* vnode associated with this nfsnode */ 3738414Smckusick long n_attrstamp; /* Time stamp (sec) for attributes */ 3838414Smckusick struct vattr n_vattr; /* Vnode attribute cache */ 3938414Smckusick struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */ 4038414Smckusick struct nfsnode *n_freef; /* free list forward */ 4138414Smckusick struct nfsnode **n_freeb; /* free list back */ 42*38884Smacklem daddr_t n_lastr; /* Last block read for read ahead */ 43*38884Smacklem u_long n_size; /* Current size of file */ 44*38884Smacklem time_t n_mtime; /* Prev modify time to maintain data cache consistency*/ 4538414Smckusick }; 4638414Smckusick 4738414Smckusick #define n_forw n_chain[0] 4838414Smckusick #define n_back n_chain[1] 4938414Smckusick 5038414Smckusick #ifdef KERNEL 5138414Smckusick struct nfsnode *nfsnode; /* the nfsnode table itself */ 5238414Smckusick struct nfsnode *nfsnodeNNFSNODE; /* the end of the nfsnode table */ 5338414Smckusick int nnfsnode; /* number of slots in the table */ 5438414Smckusick long nextnfsnodeid; /* unique id generator */ 5538414Smckusick 5638414Smckusick extern struct vnodeops nfsv2_vnodeops; /* vnode operations for nfsv2 */ 5738414Smckusick extern struct vnodeops nfsv2chr_vnodeops; /* vnode operations for chr devices */ 5838414Smckusick 5938414Smckusick /* 6038414Smckusick * Convert between nfsnode pointers and vnode pointers 6138414Smckusick */ 6238414Smckusick #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 6338414Smckusick #define NFSTOV(np) ((struct vnode *)&(np)->n_vnode) 6438414Smckusick #endif 6538414Smckusick /* 6638414Smckusick * Flags for n_flag 6738414Smckusick */ 6838414Smckusick #define NLOCKED 0x1 6938414Smckusick #define NWANT 0x2 70*38884Smacklem #define NMODIFIED 0x4 71