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 7.28 (Berkeley) 07/24/92 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_forw; /* hash, forward */ 34 struct nfsnode **n_back; /* hash, backward */ 35 nfsv2fh_t n_fh; /* NFS File Handle */ 36 long n_flag; /* Flag for locking.. */ 37 struct vnode *n_vnode; /* vnode associated with this node */ 38 struct vattr n_vattr; /* Vnode attribute cache */ 39 time_t n_attrstamp; /* Time stamp for cached attributes */ 40 struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */ 41 off_t n_size; /* Current size of file */ 42 int n_error; /* Save write error value */ 43 u_long n_direofoffset; /* Dir. EOF offset cache */ 44 union { 45 struct { 46 time_t un_mtime; /* Prev modify time. */ 47 time_t un_ctime; /* Prev create time. */ 48 } un_nfs; 49 struct { 50 u_quad_t un_brev; /* Modify rev when cached */ 51 u_quad_t un_lrev; /* Modify rev for lease */ 52 time_t un_expiry; /* Lease expiry time */ 53 struct nfsnode *un_tnext; /* Nqnfs timer chain */ 54 struct nfsnode *un_tprev; 55 long un_spare; /* pad to 8-byte boundary */ 56 } un_nqnfs; 57 } n_un; 58 struct sillyrename n_silly; /* Silly rename struct */ 59 struct timeval n_atim; /* Special file times */ 60 struct timeval n_mtim; 61 long n_spare[4]; /* Up to a power of 2 */ 62 }; 63 64 #define n_mtime n_un.un_nfs.un_mtime 65 #define n_ctime n_un.un_nfs.un_ctime 66 #define n_brev n_un.un_nqnfs.un_brev 67 #define n_lrev n_un.un_nqnfs.un_lrev 68 #define n_expiry n_un.un_nqnfs.un_expiry 69 #define n_tnext n_un.un_nqnfs.un_tnext 70 #define n_tprev n_un.un_nqnfs.un_tprev 71 72 /* 73 * Flags for n_flag 74 */ 75 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 76 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 77 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ 78 #define NQNFSWRITE 0x0040 /* Write lease */ 79 #define NQNFSEVICTED 0x0080 /* Has been evicted */ 80 #define NACC 0x0100 /* Special file accessed */ 81 #define NUPD 0x0200 /* Special file updated */ 82 #define NCHG 0x0400 /* Special file times changed */ 83 84 /* 85 * Convert between nfsnode pointers and vnode pointers 86 */ 87 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 88 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 89 90 #ifdef KERNEL 91 /* 92 * Prototypes for NFS vnode operations 93 */ 94 int nfs_lookup __P((struct vop_lookup_args *)); 95 int nfs_create __P((struct vop_create_args *)); 96 int nfs_mknod __P((struct vop_mknod_args *)); 97 int nfs_open __P((struct vop_open_args *)); 98 int nfs_close __P((struct vop_close_args *)); 99 int nfsspec_close __P((struct vop_close_args *)); 100 #ifdef FIFO 101 int nfsfifo_close __P((struct vop_close_args *)); 102 #endif 103 int nfs_access __P((struct vop_access_args *)); 104 int nfs_getattr __P((struct vop_getattr_args *)); 105 int nfs_setattr __P((struct vop_setattr_args *)); 106 int nfs_read __P((struct vop_read_args *)); 107 int nfs_write __P((struct vop_write_args *)); 108 int nfsspec_read __P((struct vop_read_args *)); 109 int nfsspec_write __P((struct vop_write_args *)); 110 #ifdef FIFO 111 int nfsfifo_read __P((struct vop_read_args *)); 112 int nfsfifo_write __P((struct vop_write_args *)); 113 #endif 114 #define nfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))enoioctl) 115 #define nfs_select ((int (*) __P((struct vop_select_args *)))seltrue) 116 int nfs_mmap __P((struct vop_mmap_args *)); 117 int nfs_fsync __P((struct vop_fsync_args *)); 118 #define nfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) 119 int nfs_remove __P((struct vop_remove_args *)); 120 int nfs_link __P((struct vop_link_args *)); 121 int nfs_rename __P((struct vop_rename_args *)); 122 int nfs_mkdir __P((struct vop_mkdir_args *)); 123 int nfs_rmdir __P((struct vop_rmdir_args *)); 124 int nfs_symlink __P((struct vop_symlink_args *)); 125 int nfs_readdir __P((struct vop_readdir_args *)); 126 int nfs_readlink __P((struct vop_readlink_args *)); 127 int nfs_abortop __P((struct vop_abortop_args *)); 128 int nfs_inactive __P((struct vop_inactive_args *)); 129 int nfs_reclaim __P((struct vop_reclaim_args *)); 130 int nfs_lock __P((struct vop_lock_args *)); 131 int nfs_unlock __P((struct vop_unlock_args *)); 132 int nfs_bmap __P((struct vop_bmap_args *)); 133 int nfs_strategy __P((struct vop_strategy_args *)); 134 int nfs_print __P((struct vop_print_args *)); 135 int nfs_islocked __P((struct vop_islocked_args *)); 136 int nfs_advlock __P((struct vop_advlock_args *)); 137 int nfs_blkatoff __P((struct vop_blkatoff_args *)); 138 int nfs_vget __P((struct mount *, ino_t, struct vnode **)); 139 int nfs_valloc __P((struct vop_valloc_args *)); 140 int nfs_vfree __P((struct vop_vfree_args *)); 141 int nfs_truncate __P((struct vop_truncate_args *)); 142 int nfs_update __P((struct vop_update_args *)); 143 int bwrite(); /* NFS needs a bwrite routine */ 144 #endif /* KERNEL */ 145