1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef _NFSCLIENT_NFSNODE_H_ 36 #define _NFSCLIENT_NFSNODE_H_ 37 38 #include <sys/_task.h> 39 40 /* 41 * Silly rename structure that hangs off the nfsnode until the name 42 * can be removed by nfs_inactive() 43 */ 44 struct sillyrename { 45 struct task s_task; 46 struct ucred *s_cred; 47 struct vnode *s_dvp; 48 long s_namlen; 49 char s_name[32]; 50 }; 51 52 /* 53 * This structure is used to save the logical directory offset to 54 * NFS cookie mappings. 55 * The mappings are stored in a list headed 56 * by n_cookies, as required. 57 * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information 58 * stored in increasing logical offset byte order. 59 */ 60 #define NFSNUMCOOKIES 31 61 62 struct nfsdmap { 63 LIST_ENTRY(nfsdmap) ndm_list; 64 int ndm_eocookie; 65 union { 66 nfsuint64 ndmu3_cookies[NFSNUMCOOKIES]; 67 uint64_t ndmu4_cookies[NFSNUMCOOKIES]; 68 } ndm_un1; 69 }; 70 71 #define ndm_cookies ndm_un1.ndmu3_cookies 72 #define ndm4_cookies ndm_un1.ndmu4_cookies 73 74 struct nfs_accesscache { 75 u_int32_t mode; /* ACCESS mode cache */ 76 uid_t uid; /* credentials having mode */ 77 time_t stamp; /* mode cache timestamp */ 78 }; 79 80 /* 81 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 82 * is purely coincidental. 83 * There is a unique nfsnode allocated for each active file, 84 * each current directory, each mounted-on file, text file, and the root. 85 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 86 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite 87 * type definitions), file handles of > 32 bytes should probably be split out 88 * into a separate malloc()'d data structure. (Reduce the size of nfsfh_t by 89 * changing the definition in nfsproto.h of NFS_SMALLFH.) 90 * NB: Hopefully the current order of the fields is such that everything will 91 * be well aligned and, therefore, tightly packed. 92 */ 93 struct nfsnode { 94 struct mtx n_mtx; /* Protects all of these members */ 95 struct lock n_excl; /* Exclusive helper for shared 96 vnode lock */ 97 u_quad_t n_size; /* Current size of file */ 98 u_quad_t n_brev; /* Modify rev when cached */ 99 u_quad_t n_lrev; /* Modify rev for lease */ 100 struct nfsvattr n_vattr; /* Vnode attribute cache */ 101 time_t n_attrstamp; /* Attr. cache timestamp */ 102 struct nfs_accesscache n_accesscache[NFS_ACCESSCACHESIZE]; 103 struct timespec n_mtime; /* Prev modify time. */ 104 struct nfsfh *n_fhp; /* NFS File Handle */ 105 struct vnode *n_vnode; /* associated vnode */ 106 struct vnode *n_dvp; /* parent vnode */ 107 struct lockf *n_lockf; /* Locking record of file */ 108 int n_error; /* Save write error value */ 109 union { 110 struct timespec nf_atim; /* Special file times */ 111 nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */ 112 u_char nd4_cookieverf[NFSX_VERF]; 113 } n_un1; 114 union { 115 struct timespec nf_mtim; 116 off_t nd_direof; /* Dir. EOF offset cache */ 117 } n_un2; 118 union { 119 struct sillyrename *nf_silly; /* Ptr to silly rename struct */ 120 LIST_HEAD(, nfsdmap) nd_cook; /* cookies */ 121 } n_un3; 122 short n_fhsize; /* size in bytes, of fh */ 123 u_int32_t n_flag; /* Flag for locking.. */ 124 int n_directio_opens; 125 u_int64_t n_change; /* old Change attribute */ 126 struct nfsv4node *n_v4; /* extra V4 stuff */ 127 struct ucred *n_writecred; /* Cred. for putpages */ 128 struct nfsclopen *n_openstateid; /* Cached open stateid */ 129 struct timespec n_localmodtime; /* Last local modify */ 130 }; 131 132 #define n_atim n_un1.nf_atim 133 #define n_mtim n_un2.nf_mtim 134 #define n_sillyrename n_un3.nf_silly 135 #define n_cookieverf n_un1.nd_cookieverf 136 #define n4_cookieverf n_un1.nd4_cookieverf 137 #define n_direofoffset n_un2.nd_direof 138 #define n_cookies n_un3.nd_cook 139 140 /* 141 * Flags for n_flag 142 */ 143 #define NDIRCOOKIELK 0x00000001 /* Lock to serialize access to directory cookies */ 144 #define NMODIFIED 0x00000004 /* Might have a modified buffer in bio */ 145 #define NWRITEERR 0x00000008 /* Flag write errors so close will know */ 146 #define NCREATED 0x00000010 /* Opened by nfs_create() */ 147 #define NTRUNCATE 0x00000020 /* Opened by nfs_setattr() */ 148 #define NSIZECHANGED 0x00000040 /* File size has changed: need cache inval */ 149 #define NNONCACHE 0x00000080 /* Node marked as noncacheable */ 150 #define NACC 0x00000100 /* Special file accessed */ 151 #define NUPD 0x00000200 /* Special file updated */ 152 #define NCHG 0x00000400 /* Special file times changed */ 153 #define NDELEGMOD 0x00000800 /* Modified delegation */ 154 #define NDELEGRECALL 0x00001000 /* Recall in progress */ 155 #define NREMOVEINPROG 0x00002000 /* Remove in progress */ 156 #define NREMOVEWANT 0x00004000 /* Want notification that remove is done */ 157 #define NLOCK 0x00008000 /* Sleep lock the node */ 158 #define NLOCKWANT 0x00010000 /* Want the sleep lock */ 159 #define NNOLAYOUT 0x00020000 /* Can't get a layout for this file */ 160 #define NWRITEOPENED 0x00040000 /* Has been opened for writing */ 161 #define NHASBEENLOCKED 0x00080000 /* Has been file locked. */ 162 #define NDSCOMMIT 0x00100000 /* Commit is done via the DS. */ 163 #define NVNSETSZSKIP 0x00200000 /* Skipped vnode_pager_setsize() */ 164 #define NMIGHTBELOCKED 0x00400000 /* Might be file locked. */ 165 166 /* 167 * Convert between nfsnode pointers and vnode pointers 168 */ 169 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 170 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 171 172 #define NFS_TIMESPEC_COMPARE(T1, T2) (((T1)->tv_sec != (T2)->tv_sec) || ((T1)->tv_nsec != (T2)->tv_nsec)) 173 174 #if defined(_KERNEL) 175 176 /* 177 * Prototypes for NFS vnode operations 178 */ 179 int ncl_getpages(struct vop_getpages_args *); 180 int ncl_putpages(struct vop_putpages_args *); 181 int ncl_write(struct vop_write_args *); 182 int ncl_inactive(struct vop_inactive_args *); 183 int ncl_reclaim(struct vop_reclaim_args *); 184 185 /* other stuff */ 186 int ncl_removeit(struct sillyrename *, struct vnode *); 187 int ncl_nget(struct mount *, u_int8_t *, int, struct nfsnode **, int); 188 nfsuint64 *ncl_getcookie(struct nfsnode *, off_t, int); 189 void ncl_invaldir(struct vnode *); 190 bool ncl_excl_start(struct vnode *); 191 void ncl_excl_finish(struct vnode *, bool old_lock); 192 void ncl_dircookie_lock(struct nfsnode *); 193 void ncl_dircookie_unlock(struct nfsnode *); 194 195 #endif /* _KERNEL */ 196 197 #endif /* _NFSCLIENT_NFSNODE_H_ */ 198