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 7.16 (Berkeley) 01/14/92 11 */ 12 13 /* 14 * Silly rename structure that hangs off the nfsnode until the name 15 * can be removed by nfs_inactive() 16 */ 17 struct sillyrename { 18 struct ucred *s_cred; 19 struct vnode *s_dvp; 20 long s_namlen; 21 char s_name[20]; 22 }; 23 24 /* 25 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 26 * is purely coincidental. 27 * There is a unique nfsnode allocated for each active file, 28 * each current directory, each mounted-on file, text file, and the root. 29 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 30 */ 31 32 struct nfsnode { 33 struct nfsnode *n_chain[2]; /* must be first */ 34 nfsv2fh_t n_fh; /* NFS File Handle */ 35 long n_flag; /* Flag for locking.. */ 36 struct vnode *n_vnode; /* vnode associated with this node */ 37 time_t n_attrstamp; /* Time stamp for cached attributes */ 38 struct vattr n_vattr; /* Vnode attribute cache */ 39 struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */ 40 u_long n_size; /* Current size of file */ 41 int n_error; /* Save write error value */ 42 u_long n_direofoffset; /* Dir. EOF offset cache */ 43 union { 44 struct { 45 time_t un_mtime; /* Prev modify time. */ 46 time_t un_ctime; /* Prev create time. */ 47 } un_nfs; 48 struct { 49 u_quad_t un_brev; /* Modify rev when cached */ 50 u_quad_t un_lrev; /* Modify rev for lease */ 51 time_t un_expiry; /* Lease expiry time */ 52 struct nfsnode *un_tnext; /* Nqnfs timer chain */ 53 struct nfsnode *un_tprev; 54 } un_nqnfs; 55 } n_un; 56 struct sillyrename n_silly; /* Silly rename struct */ 57 long n_spare[11]; /* Up to a power of 2 */ 58 }; 59 60 #define n_mtime n_un.un_nfs.un_mtime 61 #define n_ctime n_un.un_nfs.un_ctime 62 #define n_brev n_un.un_nqnfs.un_brev 63 #define n_lrev n_un.un_nqnfs.un_lrev 64 #define n_expiry n_un.un_nqnfs.un_expiry 65 #define n_tnext n_un.un_nqnfs.un_tnext 66 #define n_tprev n_un.un_nqnfs.un_tprev 67 68 #define n_forw n_chain[0] 69 #define n_back n_chain[1] 70 71 #ifdef KERNEL 72 /* 73 * Convert between nfsnode pointers and vnode pointers 74 */ 75 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 76 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 77 #endif 78 /* 79 * Flags for n_flag 80 */ 81 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 82 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 83 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ 84 #define NQNFSWRITE 0x0040 /* Write lease */ 85 #define NQNFSEVICTED 0x0080 /* Has been evicted */ 86 87 /* 88 * Prototypes for NFS vnode operations 89 */ 90 int nfs_lookup __P(( 91 struct vnode *vp, 92 struct nameidata *ndp, 93 struct proc *p)); 94 int nfs_create __P(( 95 struct nameidata *ndp, 96 struct vattr *vap, 97 struct proc *p)); 98 int nfs_mknod __P(( 99 struct nameidata *ndp, 100 struct vattr *vap, 101 struct ucred *cred, 102 struct proc *p)); 103 int nfs_open __P(( 104 struct vnode *vp, 105 int mode, 106 struct ucred *cred, 107 struct proc *p)); 108 int nfs_close __P(( 109 struct vnode *vp, 110 int fflag, 111 struct ucred *cred, 112 struct proc *p)); 113 int nfs_access __P(( 114 struct vnode *vp, 115 int mode, 116 struct ucred *cred, 117 struct proc *p)); 118 int nfs_getattr __P(( 119 struct vnode *vp, 120 struct vattr *vap, 121 struct ucred *cred, 122 struct proc *p)); 123 int nfs_setattr __P(( 124 struct vnode *vp, 125 struct vattr *vap, 126 struct ucred *cred, 127 struct proc *p)); 128 int nfs_read __P(( 129 struct vnode *vp, 130 struct uio *uio, 131 int ioflag, 132 struct ucred *cred)); 133 int nfs_write __P(( 134 struct vnode *vp, 135 struct uio *uio, 136 int ioflag, 137 struct ucred *cred)); 138 #define nfs_ioctl ((int (*) __P(( \ 139 struct vnode *vp, \ 140 int command, \ 141 caddr_t data, \ 142 int fflag, \ 143 struct ucred *cred, \ 144 struct proc *p))) enoioctl) 145 #define nfs_select ((int (*) __P(( \ 146 struct vnode *vp, \ 147 int which, \ 148 int fflags, \ 149 struct ucred *cred, \ 150 struct proc *p))) seltrue) 151 int nfs_mmap __P(( 152 struct vnode *vp, 153 int fflags, 154 struct ucred *cred, 155 struct proc *p)); 156 int nfs_fsync __P(( 157 struct vnode *vp, 158 int fflags, 159 struct ucred *cred, 160 int waitfor, 161 struct proc *p)); 162 #define nfs_seek ((int (*) __P(( \ 163 struct vnode *vp, \ 164 off_t oldoff, \ 165 off_t newoff, \ 166 struct ucred *cred))) nullop) 167 int nfs_remove __P(( 168 struct nameidata *ndp, 169 struct proc *p)); 170 int nfs_link __P(( 171 struct vnode *vp, 172 struct nameidata *ndp, 173 struct proc *p)); 174 int nfs_rename __P(( 175 struct nameidata *fndp, 176 struct nameidata *tdnp, 177 struct proc *p)); 178 int nfs_mkdir __P(( 179 struct nameidata *ndp, 180 struct vattr *vap, 181 struct proc *p)); 182 int nfs_rmdir __P(( 183 struct nameidata *ndp, 184 struct proc *p)); 185 int nfs_symlink __P(( 186 struct nameidata *ndp, 187 struct vattr *vap, 188 char *target, 189 struct proc *p)); 190 int nfs_readdir __P(( 191 struct vnode *vp, 192 struct uio *uio, 193 struct ucred *cred, 194 int *eofflagp)); 195 int nfs_readlink __P(( 196 struct vnode *vp, 197 struct uio *uio, 198 struct ucred *cred)); 199 int nfs_abortop __P(( 200 struct nameidata *ndp)); 201 int nfs_inactive __P(( 202 struct vnode *vp, 203 struct proc *p)); 204 int nfs_reclaim __P(( 205 struct vnode *vp)); 206 int nfs_lock __P(( 207 struct vnode *vp)); 208 int nfs_unlock __P(( 209 struct vnode *vp)); 210 int nfs_bmap __P(( 211 struct vnode *vp, 212 daddr_t bn, 213 struct vnode **vpp, 214 daddr_t *bnp)); 215 int nfs_strategy __P(( 216 struct buf *bp)); 217 int nfs_print __P(( 218 struct vnode *vp)); 219 int nfs_islocked __P(( 220 struct vnode *vp)); 221 int nfs_advlock __P(( 222 struct vnode *vp, 223 caddr_t id, 224 int op, 225 struct flock *fl, 226 int flags)); 227 int nfs_blkatoff __P(( 228 struct vnode *vp, 229 off_t offset, 230 char **res, 231 struct buf **bpp)); 232 int nfs_vget __P(( 233 struct mount *mp, 234 ino_t ino, 235 struct vnode **vpp)); 236 int nfs_valloc __P(( 237 struct vnode *pvp, 238 int mode, 239 struct ucred *cred, 240 struct vnode **vpp)); 241 void nfs_vfree __P(( 242 struct vnode *pvp, 243 ino_t ino, 244 int mode)); 245 int nfs_truncate __P(( 246 struct vnode *vp, 247 u_long length, 248 int flags)); 249 int nfs_update __P(( 250 struct vnode *vp, 251 struct timeval *ta, 252 struct timeval *tm, 253 int waitfor)); 254 int bwrite(); /* NFS needs a bwrite routine */ 255