1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. 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 8.9 (Berkeley) 05/14/95 11 */ 12 13 14 #ifndef _NFS_NFSNODE_H_ 15 #define _NFS_NFSNODE_H_ 16 17 #ifndef _NFS_NFS_H_ 18 #include <nfs/nfs.h> 19 #endif 20 21 /* 22 * Silly rename structure that hangs off the nfsnode until the name 23 * can be removed by nfs_inactive() 24 */ 25 struct sillyrename { 26 struct ucred *s_cred; 27 struct vnode *s_dvp; 28 long s_namlen; 29 char s_name[20]; 30 }; 31 32 /* 33 * This structure is used to save the logical directory offset to 34 * NFS cookie mappings. 35 * The mappings are stored in a list headed 36 * by n_cookies, as required. 37 * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information 38 * stored in increasing logical offset byte order. 39 */ 40 #define NFSNUMCOOKIES 31 41 42 struct nfsdmap { 43 LIST_ENTRY(nfsdmap) ndm_list; 44 int ndm_eocookie; 45 nfsuint64 ndm_cookies[NFSNUMCOOKIES]; 46 }; 47 48 /* 49 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 50 * is purely coincidental. 51 * There is a unique nfsnode allocated for each active file, 52 * each current directory, each mounted-on file, text file, and the root. 53 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 54 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite 55 * type definitions), file handles of > 32 bytes should probably be split out 56 * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by 57 * changing the definition in sys/mount.h of NFS_SMALLFH.) 58 * NB: Hopefully the current order of the fields is such that everything will 59 * be well aligned and, therefore, tightly packed. 60 */ 61 struct nfsnode { 62 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ 63 CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */ 64 u_quad_t n_size; /* Current size of file */ 65 u_quad_t n_brev; /* Modify rev when cached */ 66 u_quad_t n_lrev; /* Modify rev for lease */ 67 struct vattr n_vattr; /* Vnode attribute cache */ 68 time_t n_attrstamp; /* Attr. cache timestamp */ 69 time_t n_mtime; /* Prev modify time. */ 70 time_t n_ctime; /* Prev create time. */ 71 time_t n_expiry; /* Lease expiry time */ 72 nfsfh_t *n_fhp; /* NFS File Handle */ 73 struct vnode *n_vnode; /* associated vnode */ 74 struct lockf *n_lockf; /* Locking record of file */ 75 int n_error; /* Save write error value */ 76 union { 77 struct timespec nf_atim; /* Special file times */ 78 nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */ 79 } n_un1; 80 union { 81 struct timespec nf_mtim; 82 off_t nd_direof; /* Dir. EOF offset cache */ 83 } n_un2; 84 union { 85 struct sillyrename *nf_silly; /* Ptr to silly rename struct */ 86 LIST_HEAD(, nfsdmap) nd_cook; /* cookies */ 87 } n_un3; 88 short n_fhsize; /* size in bytes, of fh */ 89 short n_flag; /* Flag for locking.. */ 90 nfsfh_t n_fh; /* Small File Handle */ 91 }; 92 93 #define n_atim n_un1.nf_atim 94 #define n_mtim n_un2.nf_mtim 95 #define n_sillyrename n_un3.nf_silly 96 #define n_cookieverf n_un1.nd_cookieverf 97 #define n_direofoffset n_un2.nd_direof 98 #define n_cookies n_un3.nd_cook 99 100 /* 101 * Flags for n_flag 102 */ 103 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 104 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 105 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 106 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 107 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ 108 #define NQNFSWRITE 0x0040 /* Write lease */ 109 #define NQNFSEVICTED 0x0080 /* Has been evicted */ 110 #define NACC 0x0100 /* Special file accessed */ 111 #define NUPD 0x0200 /* Special file updated */ 112 #define NCHG 0x0400 /* Special file times changed */ 113 114 /* 115 * Convert between nfsnode pointers and vnode pointers 116 */ 117 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 118 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 119 120 /* 121 * Queue head for nfsiod's 122 */ 123 TAILQ_HEAD(, buf) nfs_bufq; 124 125 #ifdef KERNEL 126 /* 127 * Prototypes for NFS vnode operations 128 */ 129 int nfs_lookup __P((struct vop_lookup_args *)); 130 int nfs_create __P((struct vop_create_args *)); 131 int nfs_mknod __P((struct vop_mknod_args *)); 132 int nfs_open __P((struct vop_open_args *)); 133 int nfs_close __P((struct vop_close_args *)); 134 int nfsspec_close __P((struct vop_close_args *)); 135 int nfsfifo_close __P((struct vop_close_args *)); 136 int nfs_access __P((struct vop_access_args *)); 137 int nfsspec_access __P((struct vop_access_args *)); 138 int nfs_getattr __P((struct vop_getattr_args *)); 139 int nfs_setattr __P((struct vop_setattr_args *)); 140 int nfs_read __P((struct vop_read_args *)); 141 int nfs_write __P((struct vop_write_args *)); 142 #define nfs_lease_check ((int (*) __P((struct vop_lease_args *)))nullop) 143 #define nqnfs_vop_lease_check lease_check 144 int nfsspec_read __P((struct vop_read_args *)); 145 int nfsspec_write __P((struct vop_write_args *)); 146 int nfsfifo_read __P((struct vop_read_args *)); 147 int nfsfifo_write __P((struct vop_write_args *)); 148 #define nfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))enoioctl) 149 #define nfs_select ((int (*) __P((struct vop_select_args *)))seltrue) 150 #define nfs_revoke vop_revoke 151 int nfs_mmap __P((struct vop_mmap_args *)); 152 int nfs_fsync __P((struct vop_fsync_args *)); 153 #define nfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) 154 int nfs_remove __P((struct vop_remove_args *)); 155 int nfs_link __P((struct vop_link_args *)); 156 int nfs_rename __P((struct vop_rename_args *)); 157 int nfs_mkdir __P((struct vop_mkdir_args *)); 158 int nfs_rmdir __P((struct vop_rmdir_args *)); 159 int nfs_symlink __P((struct vop_symlink_args *)); 160 int nfs_readdir __P((struct vop_readdir_args *)); 161 int nfs_readlink __P((struct vop_readlink_args *)); 162 int nfs_abortop __P((struct vop_abortop_args *)); 163 int nfs_inactive __P((struct vop_inactive_args *)); 164 int nfs_reclaim __P((struct vop_reclaim_args *)); 165 #define nfs_lock ((int (*) __P((struct vop_lock_args *)))vop_nolock) 166 #define nfs_unlock ((int (*) __P((struct vop_unlock_args *)))vop_nounlock) 167 #define nfs_islocked ((int (*) __P((struct vop_islocked_args *)))vop_noislocked) 168 int nfs_bmap __P((struct vop_bmap_args *)); 169 int nfs_strategy __P((struct vop_strategy_args *)); 170 int nfs_print __P((struct vop_print_args *)); 171 int nfs_pathconf __P((struct vop_pathconf_args *)); 172 int nfs_advlock __P((struct vop_advlock_args *)); 173 int nfs_blkatoff __P((struct vop_blkatoff_args *)); 174 int nfs_bwrite __P((struct vop_bwrite_args *)); 175 int nfs_vget __P((struct mount *, ino_t, struct vnode **)); 176 int nfs_valloc __P((struct vop_valloc_args *)); 177 #define nfs_reallocblks \ 178 ((int (*) __P((struct vop_reallocblks_args *)))eopnotsupp) 179 int nfs_vfree __P((struct vop_vfree_args *)); 180 int nfs_truncate __P((struct vop_truncate_args *)); 181 int nfs_update __P((struct vop_update_args *)); 182 183 /* other stuff */ 184 int nfs_removeit __P((struct sillyrename *)); 185 int nfs_nget __P((struct mount *,nfsfh_t *,int,struct nfsnode **)); 186 int nfs_lookitup __P((struct vnode *,char *,int,struct ucred *,struct proc *,struct nfsnode **)); 187 int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *)); 188 nfsuint64 *nfs_getcookie __P((struct nfsnode *, off_t, int)); 189 void nfs_invaldir __P((struct vnode *)); 190 #define nqnfs_lease_updatetime lease_updatetime 191 192 #endif /* KERNEL */ 193 194 #endif 195