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 * %sccs.include.redist.c% 9 * 10 * @(#)nfsnode.h 7.11 (Berkeley) 06/28/90 11 */ 12 13 /* 14 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 15 * is purely coincidental. 16 * There is a unique nfsnode allocated for each active file, 17 * each current directory, each mounted-on file, text file, and the root. 18 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 19 */ 20 21 struct nfsnode { 22 struct nfsnode *n_chain[2]; /* must be first */ 23 nfsv2fh_t n_fh; /* NFS File Handle */ 24 long n_flag; /* Flag for locking.. */ 25 struct vnode *n_vnode; /* vnode associated with this nfsnode */ 26 time_t n_attrstamp; /* Time stamp (sec) for attributes */ 27 struct vattr n_vattr; /* Vnode attribute cache */ 28 struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */ 29 u_long n_size; /* Current size of file */ 30 time_t n_mtime; /* Prev modify time to maintain data cache consistency*/ 31 time_t n_ctime; /* Prev create time for name cache consistency*/ 32 int n_error; /* Save write error value */ 33 pid_t n_lockholder; /* holder of nfsnode lock */ 34 pid_t n_lockwaiter; /* most recent waiter for nfsnode lock */ 35 u_long n_direofoffset; /* Dir. EOF offset cache */ 36 }; 37 38 #define n_forw n_chain[0] 39 #define n_back n_chain[1] 40 41 #ifdef KERNEL 42 /* 43 * Convert between nfsnode pointers and vnode pointers 44 */ 45 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 46 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 47 #endif 48 /* 49 * Flags for n_flag 50 */ 51 #define NLOCKED 0x1 /* Lock the node for other local accesses */ 52 #define NWANT 0x2 /* Want above lock */ 53 #define NMODIFIED 0x4 /* Might have a modified buffer in bio */ 54 #define NWRITEERR 0x8 /* Flag write errors so close will know */ 55