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 7.12 (Berkeley) 04/16/91 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 56 /* 57 * Prototypes for NFS vnode operations 58 */ 59 int nfs_lookup __P(( 60 struct vnode *vp, 61 struct nameidata *ndp, 62 struct proc *p)); 63 int nfs_create __P(( 64 struct nameidata *ndp, 65 struct vattr *vap, 66 struct proc *p)); 67 int nfs_mknod __P(( 68 struct nameidata *ndp, 69 struct vattr *vap, 70 struct ucred *cred, 71 struct proc *p)); 72 int nfs_open __P(( 73 struct vnode *vp, 74 int mode, 75 struct ucred *cred, 76 struct proc *p)); 77 int nfs_close __P(( 78 struct vnode *vp, 79 int fflag, 80 struct ucred *cred, 81 struct proc *p)); 82 int nfs_access __P(( 83 struct vnode *vp, 84 int mode, 85 struct ucred *cred, 86 struct proc *p)); 87 int nfs_getattr __P(( 88 struct vnode *vp, 89 struct vattr *vap, 90 struct ucred *cred, 91 struct proc *p)); 92 int nfs_setattr __P(( 93 struct vnode *vp, 94 struct vattr *vap, 95 struct ucred *cred, 96 struct proc *p)); 97 int nfs_read __P(( 98 struct vnode *vp, 99 struct uio *uio, 100 int ioflag, 101 struct ucred *cred)); 102 int nfs_write __P(( 103 struct vnode *vp, 104 struct uio *uio, 105 int ioflag, 106 struct ucred *cred)); 107 #define nfs_ioctl ((int (*) __P(( \ 108 struct vnode *vp, \ 109 int command, \ 110 caddr_t data, \ 111 int fflag, \ 112 struct ucred *cred, \ 113 struct proc *p))) enoioctl) 114 #define nfs_select ((int (*) __P(( \ 115 struct vnode *vp, \ 116 int which, \ 117 int fflags, \ 118 struct ucred *cred, \ 119 struct proc *p))) seltrue) 120 int nfs_mmap __P(( 121 struct vnode *vp, 122 int fflags, 123 struct ucred *cred, 124 struct proc *p)); 125 int nfs_fsync __P(( 126 struct vnode *vp, 127 int fflags, 128 struct ucred *cred, 129 int waitfor, 130 struct proc *p)); 131 #define nfs_seek ((int (*) __P(( \ 132 struct vnode *vp, \ 133 off_t oldoff, \ 134 off_t newoff, \ 135 struct ucred *cred))) nullop) 136 int nfs_remove __P(( 137 struct nameidata *ndp, 138 struct proc *p)); 139 int nfs_link __P(( 140 struct vnode *vp, 141 struct nameidata *ndp, 142 struct proc *p)); 143 int nfs_rename __P(( 144 struct nameidata *fndp, 145 struct nameidata *tdnp, 146 struct proc *p)); 147 int nfs_mkdir __P(( 148 struct nameidata *ndp, 149 struct vattr *vap, 150 struct proc *p)); 151 int nfs_rmdir __P(( 152 struct nameidata *ndp, 153 struct proc *p)); 154 int nfs_symlink __P(( 155 struct nameidata *ndp, 156 struct vattr *vap, 157 char *target, 158 struct proc *p)); 159 int nfs_readdir __P(( 160 struct vnode *vp, 161 struct uio *uio, 162 struct ucred *cred, 163 int *eofflagp)); 164 int nfs_readlink __P(( 165 struct vnode *vp, 166 struct uio *uio, 167 struct ucred *cred)); 168 int nfs_abortop __P(( 169 struct nameidata *ndp)); 170 int nfs_inactive __P(( 171 struct vnode *vp, 172 struct proc *p)); 173 int nfs_reclaim __P(( 174 struct vnode *vp)); 175 int nfs_lock __P(( 176 struct vnode *vp)); 177 int nfs_unlock __P(( 178 struct vnode *vp)); 179 int nfs_bmap __P(( 180 struct vnode *vp, 181 daddr_t bn, 182 struct vnode **vpp, 183 daddr_t *bnp)); 184 int nfs_strategy __P(( 185 struct buf *bp)); 186 int nfs_print __P(( 187 struct vnode *vp)); 188 int nfs_islocked __P(( 189 struct vnode *vp)); 190 int nfs_advlock __P(( 191 struct vnode *vp, 192 caddr_t id, 193 int op, 194 struct flock *fl, 195 int flags)); 196