Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/nfs/nfsclstate.h
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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_NFSCLSTATE_H_ 30 #define _NFS_NFSCLSTATE_H_ 31 32 /* 33 * Definitions for NFS V4 client state handling. 34 */ 35 LIST_HEAD(nfsclopenhead, nfsclopen); 36 LIST_HEAD(nfscllockownerhead, nfscllockowner); 37 SLIST_HEAD(nfscllockownerfhhead, nfscllockownerfh); 38 LIST_HEAD(nfscllockhead, nfscllock); 39 LIST_HEAD(nfsclhead, nfsclclient); 40 LIST_HEAD(nfsclownerhead, nfsclowner); 41 TAILQ_HEAD(nfscldeleghead, nfscldeleg); 42 LIST_HEAD(nfscldeleghash, nfscldeleg); 43 TAILQ_HEAD(nfscllayouthead, nfscllayout); 44 LIST_HEAD(nfscllayouthash, nfscllayout); 45 LIST_HEAD(nfsclflayouthead, nfsclflayout); 46 LIST_HEAD(nfscldevinfohead, nfscldevinfo); 47 LIST_HEAD(nfsclrecalllayouthead, nfsclrecalllayout); 48 #define NFSCLDELEGHASHSIZE 256 49 #define NFSCLDELEGHASH(c, f, l) \ 50 (&((c)->nfsc_deleghash[ncl_hash((f), (l)) % NFSCLDELEGHASHSIZE])) 51 #define NFSCLLAYOUTHASHSIZE 256 52 #define NFSCLLAYOUTHASH(c, f, l) \ 53 (&((c)->nfsc_layouthash[ncl_hash((f), (l)) % NFSCLLAYOUTHASHSIZE])) 54 55 /* Structure for NFSv4.1 session stuff. */ 56 struct nfsclsession { 57 struct mtx nfsess_mtx; 58 struct nfsslot nfsess_cbslots[NFSV4_CBSLOTS]; 59 nfsquad_t nfsess_clientid; 60 SVCXPRT *nfsess_xprt; /* For backchannel callback */ 61 uint32_t nfsess_slotseq[64]; /* Max for 64bit nm_slots */ 62 uint64_t nfsess_slots; 63 uint32_t nfsess_sequenceid; 64 uint32_t nfsess_maxcache; /* Max size for cached reply. */ 65 uint16_t nfsess_foreslots; 66 uint16_t nfsess_backslots; 67 uint8_t nfsess_sessionid[NFSX_V4SESSIONID]; 68 uint8_t nfsess_defunct; /* Non-zero for old sessions */ 69 }; 70 71 /* 72 * This structure holds the session, clientid and related information 73 * needed for an NFSv4.1 Meta Data Server (MDS) or Data Server (DS). 74 * It is malloc'd to the correct length. 75 */ 76 struct nfsclds { 77 TAILQ_ENTRY(nfsclds) nfsclds_list; 78 struct nfsclsession nfsclds_sess; 79 struct mtx nfsclds_mtx; 80 struct nfssockreq *nfsclds_sockp; 81 time_t nfsclds_expire; 82 uint16_t nfsclds_flags; 83 uint16_t nfsclds_servownlen; 84 uint8_t nfsclds_verf[NFSX_VERF]; 85 uint8_t nfsclds_serverown[0]; 86 }; 87 88 /* 89 * Flags for nfsclds_flags. 90 */ 91 #define NFSCLDS_HASWRITEVERF 0x0001 92 #define NFSCLDS_MDS 0x0002 93 #define NFSCLDS_DS 0x0004 94 #define NFSCLDS_CLOSED 0x0008 95 96 struct nfsclclient { 97 LIST_ENTRY(nfsclclient) nfsc_list; 98 struct nfsclownerhead nfsc_owner; 99 struct nfscldeleghead nfsc_deleg; 100 struct nfscldeleghash nfsc_deleghash[NFSCLDELEGHASHSIZE]; 101 struct nfscllayouthead nfsc_layout; 102 struct nfscllayouthash nfsc_layouthash[NFSCLLAYOUTHASHSIZE]; 103 struct nfscldevinfohead nfsc_devinfo; 104 struct nfsv4lock nfsc_lock; 105 struct proc *nfsc_renewthread; 106 struct nfsmount *nfsc_nmp; 107 time_t nfsc_expire; 108 u_int32_t nfsc_clientidrev; 109 u_int32_t nfsc_rev; 110 u_int32_t nfsc_renew; 111 u_int32_t nfsc_cbident; 112 u_int16_t nfsc_flags; 113 u_int16_t nfsc_idlen; 114 u_int8_t nfsc_id[1]; /* Malloc'd to correct length */ 115 }; 116 117 /* 118 * Bits for nfsc_flags. 119 */ 120 #define NFSCLFLAGS_INITED 0x0001 121 #define NFSCLFLAGS_HASCLIENTID 0x0002 122 #define NFSCLFLAGS_RECOVER 0x0004 123 #define NFSCLFLAGS_UMOUNT 0x0008 124 #define NFSCLFLAGS_HASTHREAD 0x0010 125 #define NFSCLFLAGS_AFINET6 0x0020 126 #define NFSCLFLAGS_EXPIREIT 0x0040 127 #define NFSCLFLAGS_FIRSTDELEG 0x0080 128 #define NFSCLFLAGS_GOTDELEG 0x0100 129 #define NFSCLFLAGS_RECVRINPROG 0x0200 130 131 struct nfsclowner { 132 LIST_ENTRY(nfsclowner) nfsow_list; 133 struct nfsclopenhead nfsow_open; 134 struct nfsclclient *nfsow_clp; 135 u_int32_t nfsow_seqid; 136 u_int32_t nfsow_defunct; 137 struct nfsv4lock nfsow_rwlock; 138 u_int8_t nfsow_owner[NFSV4CL_LOCKNAMELEN]; 139 }; 140 141 /* 142 * MALLOC'd to the correct length to accommodate the file handle. 143 */ 144 struct nfscldeleg { 145 TAILQ_ENTRY(nfscldeleg) nfsdl_list; 146 LIST_ENTRY(nfscldeleg) nfsdl_hash; 147 struct nfsclownerhead nfsdl_owner; /* locally issued state */ 148 struct nfscllockownerhead nfsdl_lock; 149 nfsv4stateid_t nfsdl_stateid; 150 struct acl_entry nfsdl_ace; /* Delegation ace */ 151 struct nfsclclient *nfsdl_clp; 152 struct nfsv4lock nfsdl_rwlock; /* for active I/O ops */ 153 struct nfscred nfsdl_cred; /* Cred. used for Open */ 154 time_t nfsdl_timestamp; /* used for stale cleanup */ 155 u_int64_t nfsdl_sizelimit; /* Limit for file growth */ 156 u_int64_t nfsdl_size; /* saved copy of file size */ 157 u_int64_t nfsdl_change; /* and change attribute */ 158 struct timespec nfsdl_modtime; /* local modify time */ 159 u_int16_t nfsdl_fhlen; 160 u_int8_t nfsdl_flags; 161 u_int8_t nfsdl_fh[1]; /* must be last */ 162 }; 163 164 /* 165 * nfsdl_flags bits. 166 */ 167 #define NFSCLDL_READ 0x01 168 #define NFSCLDL_WRITE 0x02 169 #define NFSCLDL_RECALL 0x04 170 #define NFSCLDL_NEEDRECLAIM 0x08 171 #define NFSCLDL_ZAPPED 0x10 172 #define NFSCLDL_MODTIMESET 0x20 173 #define NFSCLDL_DELEGRET 0x40 174 175 /* 176 * MALLOC'd to the correct length to accommodate the file handle. 177 */ 178 struct nfsclopen { 179 LIST_ENTRY(nfsclopen) nfso_list; 180 struct nfscllockownerhead nfso_lock; 181 nfsv4stateid_t nfso_stateid; 182 struct nfsclowner *nfso_own; 183 struct nfscred nfso_cred; /* Cred. used for Open */ 184 u_int32_t nfso_mode; 185 u_int32_t nfso_opencnt; 186 u_int16_t nfso_fhlen; 187 u_int8_t nfso_posixlock; /* 1 for POSIX type locking */ 188 u_int8_t nfso_fh[1]; /* must be last */ 189 }; 190 191 /* 192 * Return values for nfscl_open(). NFSCLOPEN_OK must == 0. 193 */ 194 #define NFSCLOPEN_OK 0 195 #define NFSCLOPEN_DOOPEN 1 196 #define NFSCLOPEN_DOOPENDOWNGRADE 2 197 #define NFSCLOPEN_SETCRED 3 198 199 struct nfscllockowner { 200 LIST_ENTRY(nfscllockowner) nfsl_list; 201 struct nfscllockhead nfsl_lock; 202 struct nfsclopen *nfsl_open; 203 NFSPROC_T *nfsl_inprog; 204 nfsv4stateid_t nfsl_stateid; 205 int nfsl_lockflags; 206 u_int32_t nfsl_seqid; 207 struct nfsv4lock nfsl_rwlock; 208 u_int8_t nfsl_owner[NFSV4CL_LOCKNAMELEN]; 209 u_int8_t nfsl_openowner[NFSV4CL_LOCKNAMELEN]; 210 }; 211 212 /* 213 * Byte range entry for the above lock owner. 214 */ 215 struct nfscllock { 216 LIST_ENTRY(nfscllock) nfslo_list; 217 u_int64_t nfslo_first; 218 u_int64_t nfslo_end; 219 short nfslo_type; 220 }; 221 222 /* This structure is used to collect a list of lockowners to free up. */ 223 struct nfscllockownerfh { 224 SLIST_ENTRY(nfscllockownerfh) nfslfh_list; 225 struct nfscllockownerhead nfslfh_lock; 226 int nfslfh_len; 227 uint8_t nfslfh_fh[NFSX_V4FHMAX]; 228 }; 229 230 /* 231 * MALLOC'd to the correct length to accommodate the file handle. 232 */ 233 struct nfscllayout { 234 TAILQ_ENTRY(nfscllayout) nfsly_list; 235 LIST_ENTRY(nfscllayout) nfsly_hash; 236 nfsv4stateid_t nfsly_stateid; 237 struct nfsv4lock nfsly_lock; 238 uint64_t nfsly_filesid[2]; 239 uint64_t nfsly_lastbyte; 240 struct nfsclflayouthead nfsly_flayread; 241 struct nfsclflayouthead nfsly_flayrw; 242 struct nfsclrecalllayouthead nfsly_recall; 243 time_t nfsly_timestamp; 244 struct nfsclclient *nfsly_clp; 245 uint16_t nfsly_flags; 246 uint16_t nfsly_fhlen; 247 uint8_t nfsly_fh[1]; 248 }; 249 250 /* 251 * Flags for nfsly_flags. 252 */ 253 #define NFSLY_FILES 0x0001 254 #define NFSLY_BLOCK 0x0002 255 #define NFSLY_OBJECT 0x0004 256 #define NFSLY_RECALL 0x0008 257 #define NFSLY_RECALLFILE 0x0010 258 #define NFSLY_RECALLFSID 0x0020 259 #define NFSLY_RECALLALL 0x0040 260 #define NFSLY_RETONCLOSE 0x0080 261 #define NFSLY_WRITTEN 0x0100 /* Has been used to write to a DS. */ 262 263 /* 264 * MALLOC'd to the correct length to accommodate the file handle list. 265 * These hang off of nfsly_flayread and nfsly_flayrw, sorted in increasing 266 * offset order. 267 * The nfsly_flayread list holds the ones with iomode == NFSLAYOUTIOMODE_READ, 268 * whereas the nfsly_flayrw holds the ones with iomode == NFSLAYOUTIOMODE_RW. 269 */ 270 struct nfsclflayout { 271 LIST_ENTRY(nfsclflayout) nfsfl_list; 272 uint8_t nfsfl_dev[NFSX_V4DEVICEID]; 273 uint64_t nfsfl_off; 274 uint64_t nfsfl_end; 275 uint64_t nfsfl_patoff; 276 struct nfscldevinfo *nfsfl_devp; 277 uint32_t nfsfl_iomode; 278 uint32_t nfsfl_util; 279 uint32_t nfsfl_stripe1; 280 uint16_t nfsfl_flags; 281 uint16_t nfsfl_fhcnt; 282 struct nfsfh *nfsfl_fh[1]; /* FH list for DS */ 283 }; 284 285 /* 286 * Flags for nfsfl_flags. 287 */ 288 #define NFSFL_RECALL 0x0001 /* File layout has been recalled */ 289 290 /* 291 * Structure that is used to store a LAYOUTRECALL. 292 */ 293 struct nfsclrecalllayout { 294 LIST_ENTRY(nfsclrecalllayout) nfsrecly_list; 295 uint64_t nfsrecly_off; 296 uint64_t nfsrecly_len; 297 int nfsrecly_recalltype; 298 uint32_t nfsrecly_iomode; 299 uint32_t nfsrecly_stateseqid; 300 }; 301 302 /* 303 * Stores the NFSv4.1 Device Info. Malloc'd to the correct length to 304 * store the list of network connections and list of indices. 305 * nfsdi_data[] is allocated the following way: 306 * - nfsdi_addrcnt * struct nfsclds 307 * - stripe indices, each stored as one byte, since there can be many 308 * of them. (This implies a limit of 256 on nfsdi_addrcnt, since the 309 * indices select which address.) 310 */ 311 struct nfscldevinfo { 312 LIST_ENTRY(nfscldevinfo) nfsdi_list; 313 uint8_t nfsdi_deviceid[NFSX_V4DEVICEID]; 314 struct nfsclclient *nfsdi_clp; 315 uint32_t nfsdi_refcnt; 316 uint32_t nfsdi_layoutrefs; 317 uint16_t nfsdi_stripecnt; 318 uint16_t nfsdi_addrcnt; 319 struct nfsclds *nfsdi_data[0]; 320 }; 321 322 /* These inline functions return values from nfsdi_data[]. */ 323 /* 324 * Return a pointer to the address at "pos". 325 */ 326 static __inline struct nfsclds ** 327 nfsfldi_addr(struct nfscldevinfo *ndi, int pos) 328 { 329 330 if (pos >= ndi->nfsdi_addrcnt) 331 return (NULL); 332 return (&ndi->nfsdi_data[pos]); 333 } 334 335 /* 336 * Return the Nth ("pos") stripe index. 337 */ 338 static __inline int 339 nfsfldi_stripeindex(struct nfscldevinfo *ndi, int pos) 340 { 341 uint8_t *valp; 342 343 if (pos >= ndi->nfsdi_stripecnt) 344 return (-1); 345 valp = (uint8_t *)&ndi->nfsdi_data[ndi->nfsdi_addrcnt]; 346 valp += pos; 347 return ((int)*valp); 348 } 349 350 /* 351 * Set the Nth ("pos") stripe index to "val". 352 */ 353 static __inline void 354 nfsfldi_setstripeindex(struct nfscldevinfo *ndi, int pos, uint8_t val) 355 { 356 uint8_t *valp; 357 358 if (pos >= ndi->nfsdi_stripecnt) 359 return; 360 valp = (uint8_t *)&ndi->nfsdi_data[ndi->nfsdi_addrcnt]; 361 valp += pos; 362 *valp = val; 363 } 364 365 /* 366 * Macro for incrementing the seqid#. 367 */ 368 #define NFSCL_INCRSEQID(s, n) do { \ 369 if (((n)->nd_flag & ND_INCRSEQID)) \ 370 (s)++; \ 371 } while (0) 372 373 #endif /* _NFS_NFSCLSTATE_H_ */
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