1 /*- 2 * Copyright (c) 2009 Rick Macklem, University of Guelph 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _NFS_NFSRVSTATE_H_ 30 #define _NFS_NFSRVSTATE_H_ 31 32 /* 33 * Definitions for NFS V4 server state handling. 34 */ 35 36 /* 37 * List heads for nfsclient, nfsstate and nfslockfile. 38 * (Some systems seem to like to dynamically size these things, but I 39 * don't see any point in doing so for these ones.) 40 */ 41 LIST_HEAD(nfsclienthashhead, nfsclient); 42 LIST_HEAD(nfsstatehead, nfsstate); 43 LIST_HEAD(nfslockhead, nfslock); 44 LIST_HEAD(nfslockhashhead, nfslockfile); 45 46 /* 47 * List head for nfsusrgrp. 48 */ 49 LIST_HEAD(nfsuserhashhead, nfsusrgrp); 50 TAILQ_HEAD(nfsuserlruhead, nfsusrgrp); 51 52 #define NFSCLIENTHASH(id) \ 53 (&nfsclienthash[(id).lval[1] % NFSCLIENTHASHSIZE]) 54 #define NFSSTATEHASH(clp, id) \ 55 (&((clp)->lc_stateid[(id).other[2] % NFSSTATEHASHSIZE])) 56 #define NFSUSERHASH(id) \ 57 (&nfsuserhash[(id) % NFSUSERHASHSIZE]) 58 #define NFSUSERNAMEHASH(p, l) \ 59 (&nfsusernamehash[((l)>=4?(*(p)+*((p)+1)+*((p)+2)+*((p)+3)):*(p)) \ 60 % NFSUSERHASHSIZE]) 61 #define NFSGROUPHASH(id) \ 62 (&nfsgrouphash[(id) % NFSGROUPHASHSIZE]) 63 #define NFSGROUPNAMEHASH(p, l) \ 64 (&nfsgroupnamehash[((l)>=4?(*(p)+*((p)+1)+*((p)+2)+*((p)+3)):*(p)) \ 65 % NFSGROUPHASHSIZE]) 66 67 /* 68 * Client server structure for V4. It is doubly linked into two lists. 69 * The first is a hash table based on the clientid and the second is a 70 * list of all clients maintained in LRU order. 71 * The actual size malloc'd is large enough to accomodate the id string. 72 */ 73 struct nfsclient { 74 LIST_ENTRY(nfsclient) lc_hash; /* Clientid hash list */ 75 struct nfsstatehead lc_stateid[NFSSTATEHASHSIZE]; /* stateid hash */ 76 struct nfsstatehead lc_open; /* Open owner list */ 77 struct nfsstatehead lc_deleg; /* Delegations */ 78 struct nfsstatehead lc_olddeleg; /* and old delegations */ 79 time_t lc_expiry; /* Expiry time (sec) */ 80 time_t lc_delegtime; /* Old deleg expiry (sec) */ 81 nfsquad_t lc_clientid; /* 64 bit clientid */ 82 nfsquad_t lc_confirm; /* 64 bit confirm value */ 83 u_int32_t lc_program; /* RPC Program # */ 84 u_int32_t lc_callback; /* Callback id */ 85 u_int32_t lc_stateindex; /* Current state index# */ 86 u_int32_t lc_statemaxindex; /* Max state index# */ 87 u_int32_t lc_cbref; /* Cnt of callbacks */ 88 uid_t lc_uid; /* User credential */ 89 gid_t lc_gid; 90 u_int16_t lc_namelen; 91 u_char *lc_name; 92 struct nfssockreq lc_req; /* Callback info */ 93 u_short lc_idlen; /* Length of id string */ 94 u_int32_t lc_flags; /* LCL_ flag bits */ 95 u_char lc_verf[NFSX_VERF]; /* client verifier */ 96 u_char lc_id[1]; /* Malloc'd correct size */ 97 }; 98 99 #define CLOPS_CONFIRM 0x0001 100 #define CLOPS_RENEW 0x0002 101 #define CLOPS_RENEWOP 0x0004 102 103 /* 104 * Nfs state structure. I couldn't resist overloading this one, since 105 * it makes cleanup, etc. simpler. These structures are used in four ways: 106 * - open_owner structures chained off of nfsclient 107 * - open file structures chained off an open_owner structure 108 * - lock_owner structures chained off an open file structure 109 * - delegated file structures chained off of nfsclient and nfslockfile 110 * - the ls_list field is used for the chain it is in 111 * - the ls_head structure is used to chain off the sibling structure 112 * (it is a union between an nfsstate and nfslock structure head) 113 * If it is a lockowner stateid, nfslock structures hang off it. 114 * For the open file and lockowner cases, it is in the hash table in 115 * nfsclient for stateid. 116 */ 117 struct nfsstate { 118 LIST_ENTRY(nfsstate) ls_hash; /* Hash list entry */ 119 LIST_ENTRY(nfsstate) ls_list; /* List of opens/delegs */ 120 LIST_ENTRY(nfsstate) ls_file; /* Opens/Delegs for a file */ 121 union { 122 struct nfsstatehead open; /* Opens list */ 123 struct nfslockhead lock; /* Locks list */ 124 } ls_head; 125 nfsv4stateid_t ls_stateid; /* The state id */ 126 u_int32_t ls_seq; /* seq id */ 127 uid_t ls_uid; /* uid of locker */ 128 u_int32_t ls_flags; /* Type of lock, etc. */ 129 union { 130 struct nfsstate *openowner; /* Open only */ 131 u_int32_t opentolockseq; /* Lock call only */ 132 u_int32_t noopens; /* Openowner only */ 133 struct { 134 u_quad_t filerev; /* Delegations only */ 135 time_t expiry; 136 time_t limit; 137 u_int64_t compref; 138 } deleg; 139 } ls_un; 140 struct nfslockfile *ls_lfp; /* Back pointer */ 141 struct nfsrvcache *ls_op; /* Op cache reference */ 142 struct nfsclient *ls_clp; /* Back pointer */ 143 u_short ls_ownerlen; /* Length of ls_owner */ 144 u_char ls_owner[1]; /* malloc'd the correct size */ 145 }; 146 #define ls_lock ls_head.lock 147 #define ls_open ls_head.open 148 #define ls_opentolockseq ls_un.opentolockseq 149 #define ls_openowner ls_un.openowner 150 #define ls_openstp ls_un.openowner 151 #define ls_noopens ls_un.noopens 152 #define ls_filerev ls_un.deleg.filerev 153 #define ls_delegtime ls_un.deleg.expiry 154 #define ls_delegtimelimit ls_un.deleg.limit 155 #define ls_compref ls_un.deleg.compref 156 157 /* 158 * Nfs lock structure. 159 * This structure is chained off of the nfsstate (the lockowner) and 160 * nfslockfile (the file) structures, for the file and owner it 161 * refers to. It holds flags and a byte range. 162 * It also has back pointers to the associated lock_owner and lockfile. 163 */ 164 struct nfslock { 165 LIST_ENTRY(nfslock) lo_lckowner; 166 LIST_ENTRY(nfslock) lo_lckfile; 167 struct nfsstate *lo_stp; 168 struct nfslockfile *lo_lfp; 169 u_int64_t lo_first; 170 u_int64_t lo_end; 171 u_int32_t lo_flags; 172 }; 173 174 /* 175 * Structure used to return a conflicting lock. (Must be large 176 * enough for the largest lock owner we can have.) 177 */ 178 struct nfslockconflict { 179 nfsquad_t cl_clientid; 180 u_int64_t cl_first; 181 u_int64_t cl_end; 182 u_int32_t cl_flags; 183 u_short cl_ownerlen; 184 u_char cl_owner[NFSV4_OPAQUELIMIT]; 185 }; 186 187 /* 188 * This structure is used to keep track of local locks that might need 189 * to be rolled back. 190 */ 191 struct nfsrollback { 192 LIST_ENTRY(nfsrollback) rlck_list; 193 uint64_t rlck_first; 194 uint64_t rlck_end; 195 int rlck_type; 196 }; 197 198 /* 199 * This structure refers to a file for which lock(s) and/or open(s) exist. 200 * Searched via hash table on file handle or found via the back pointer from an 201 * open or lock owner. 202 */ 203 struct nfslockfile { 204 LIST_HEAD(, nfsstate) lf_open; /* Open list */ 205 LIST_HEAD(, nfsstate) lf_deleg; /* Delegation list */ 206 LIST_HEAD(, nfslock) lf_lock; /* Lock list */ 207 LIST_HEAD(, nfslock) lf_locallock; /* Local lock list */ 208 LIST_HEAD(, nfsrollback) lf_rollback; /* Local lock rollback list */ 209 LIST_ENTRY(nfslockfile) lf_hash; /* Hash list entry */ 210 fhandle_t lf_fh; /* The file handle */ 211 struct nfsv4lock lf_locallock_lck; /* serialize local locking */ 212 int lf_usecount; /* Ref count for locking */ 213 }; 214 215 /* 216 * This structure is malloc'd an chained off hash lists for user/group 217 * names. 218 */ 219 struct nfsusrgrp { 220 TAILQ_ENTRY(nfsusrgrp) lug_lru; /* LRU list */ 221 LIST_ENTRY(nfsusrgrp) lug_numhash; /* Hash by id# */ 222 LIST_ENTRY(nfsusrgrp) lug_namehash; /* and by name */ 223 time_t lug_expiry; /* Expiry time in sec */ 224 union { 225 uid_t un_uid; /* id# */ 226 gid_t un_gid; 227 } lug_un; 228 int lug_namelen; /* Name length */ 229 u_char lug_name[1]; /* malloc'd correct length */ 230 }; 231 #define lug_uid lug_un.un_uid 232 #define lug_gid lug_un.un_gid 233 234 /* 235 * These structures are used for the stable storage restart stuff. 236 */ 237 /* 238 * Record at beginning of file. 239 */ 240 struct nfsf_rec { 241 u_int32_t lease; /* Lease duration */ 242 u_int32_t numboots; /* Number of boottimes */ 243 }; 244 245 #if defined(_KERNEL) || defined(KERNEL) 246 void nfsrv_cleanclient(struct nfsclient *, NFSPROC_T *); 247 void nfsrv_freedeleglist(struct nfsstatehead *); 248 #endif 249 250 #endif /* _NFS_NFSRVSTATE_H_ */ 251