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 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Rick Macklem, University of Guelph 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _NFS_NFSCLSTATE_H_ 32 #define _NFS_NFSCLSTATE_H_ 33 34 /* 35 * Definitions for NFS V4 client state handling. 36 */ 37 LIST_HEAD(nfsclopenhead, nfsclopen); 38 LIST_HEAD(nfscllockownerhead, nfscllockowner); 39 SLIST_HEAD(nfscllockownerfhhead, nfscllockownerfh); 40 LIST_HEAD(nfscllockhead, nfscllock); 41 LIST_HEAD(nfsclhead, nfsclclient); 42 LIST_HEAD(nfsclownerhead, nfsclowner); 43 TAILQ_HEAD(nfscldeleghead, nfscldeleg); 44 LIST_HEAD(nfscldeleghash, nfscldeleg); 45 LIST_HEAD(nfsclopenhash, nfsclopen); 46 TAILQ_HEAD(nfscllayouthead, nfscllayout); 47 LIST_HEAD(nfscllayouthash, nfscllayout); 48 LIST_HEAD(nfsclflayouthead, nfsclflayout); 49 LIST_HEAD(nfscldevinfohead, nfscldevinfo); 50 LIST_HEAD(nfsclrecalllayouthead, nfsclrecalllayout); 51 #define NFSCLDELEGHASHSIZE 256 52 #define NFSCLDELEGHASH(c, f, l) \ 53 (&((c)->nfsc_deleghash[ncl_hash((f), (l)) % NFSCLDELEGHASHSIZE])) 54 #define NFSCLOPENHASHSIZE 256 55 #define NFSCLOPENHASHFUNC(f, l) (ncl_hash((f), (l)) % NFSCLOPENHASHSIZE) 56 #define NFSCLOPENHASH(c, f, l) \ 57 (&((c)->nfsc_openhash[NFSCLOPENHASHFUNC((f), (l))])) 58 #define NFSCLLAYOUTHASHSIZE 256 59 #define NFSCLLAYOUTHASH(c, f, l) \ 60 (&((c)->nfsc_layouthash[ncl_hash((f), (l)) % NFSCLLAYOUTHASHSIZE])) 61 62 /* Structure for NFSv4.1 session stuff. */ 63 struct nfsclsession { 64 struct mtx nfsess_mtx; 65 struct nfsslot nfsess_cbslots[NFSV4_CBSLOTS]; 66 nfsquad_t nfsess_clientid; 67 SVCXPRT *nfsess_xprt; /* For backchannel callback */ 68 uint32_t nfsess_slotseq[64]; /* Max for 64bit nm_slots */ 69 uint64_t nfsess_slots; 70 uint64_t nfsess_badslots; /* Slots possibly broken */ 71 uint32_t nfsess_sequenceid; 72 uint32_t nfsess_maxcache; /* Max size for cached reply. */ 73 uint32_t nfsess_maxreq; /* Max request size. */ 74 uint32_t nfsess_maxresp; /* Max reply size. */ 75 uint16_t nfsess_foreslots; 76 uint16_t nfsess_backslots; 77 uint8_t nfsess_sessionid[NFSX_V4SESSIONID]; 78 uint8_t nfsess_defunct; /* Non-zero for old sessions */ 79 }; 80 81 /* 82 * This structure holds the session, clientid and related information 83 * needed for an NFSv4.1 or NFSv4.2 Meta Data Server (MDS) or Data Server (DS). 84 * It is malloc'd to the correct length. 85 */ 86 struct nfsclds { 87 TAILQ_ENTRY(nfsclds) nfsclds_list; 88 struct nfsclsession nfsclds_sess; 89 struct mtx nfsclds_mtx; 90 struct nfssockreq *nfsclds_sockp; 91 time_t nfsclds_expire; 92 uint16_t nfsclds_flags; 93 uint16_t nfsclds_servownlen; 94 uint8_t nfsclds_verf[NFSX_VERF]; 95 uint8_t nfsclds_serverown[0]; 96 }; 97 98 /* 99 * Flags for nfsclds_flags. 100 */ 101 #define NFSCLDS_HASWRITEVERF 0x0001 102 #define NFSCLDS_MDS 0x0002 103 #define NFSCLDS_DS 0x0004 104 #define NFSCLDS_CLOSED 0x0008 105 #define NFSCLDS_SAMECONN 0x0010 106 #define NFSCLDS_MINORV2 0x0020 107 108 struct nfsclclient { 109 LIST_ENTRY(nfsclclient) nfsc_list; 110 struct nfsclownerhead nfsc_owner; 111 struct nfscldeleghead nfsc_deleg; 112 struct nfscldeleghash nfsc_deleghash[NFSCLDELEGHASHSIZE]; 113 struct nfsclopenhash nfsc_openhash[NFSCLOPENHASHSIZE]; 114 struct nfscllayouthead nfsc_layout; 115 struct nfscllayouthash nfsc_layouthash[NFSCLLAYOUTHASHSIZE]; 116 struct nfscldevinfohead nfsc_devinfo; 117 struct nfsv4lock nfsc_lock; 118 struct proc *nfsc_renewthread; 119 struct nfsmount *nfsc_nmp; 120 time_t nfsc_expire; 121 u_int32_t nfsc_clientidrev; 122 u_int32_t nfsc_rev; 123 u_int32_t nfsc_renew; 124 u_int32_t nfsc_cbident; 125 u_int16_t nfsc_flags; 126 u_int16_t nfsc_idlen; 127 u_int8_t nfsc_id[1]; /* Malloc'd to correct length */ 128 }; 129 130 /* 131 * Bits for nfsc_flags. 132 */ 133 #define NFSCLFLAGS_INITED 0x0001 134 #define NFSCLFLAGS_HASCLIENTID 0x0002 135 #define NFSCLFLAGS_RECOVER 0x0004 136 #define NFSCLFLAGS_UMOUNT 0x0008 137 #define NFSCLFLAGS_HASTHREAD 0x0010 138 #define NFSCLFLAGS_AFINET6 0x0020 139 #define NFSCLFLAGS_EXPIREIT 0x0040 140 #define NFSCLFLAGS_FIRSTDELEG 0x0080 141 #define NFSCLFLAGS_GOTDELEG 0x0100 142 #define NFSCLFLAGS_RECVRINPROG 0x0200 143 144 struct nfsclowner { 145 LIST_ENTRY(nfsclowner) nfsow_list; 146 struct nfsclopenhead nfsow_open; 147 struct nfsclclient *nfsow_clp; 148 u_int32_t nfsow_seqid; 149 u_int32_t nfsow_defunct; 150 struct nfsv4lock nfsow_rwlock; 151 u_int8_t nfsow_owner[NFSV4CL_LOCKNAMELEN]; 152 }; 153 154 /* 155 * MALLOC'd to the correct length to accommodate the file handle. 156 */ 157 struct nfscldeleg { 158 TAILQ_ENTRY(nfscldeleg) nfsdl_list; 159 LIST_ENTRY(nfscldeleg) nfsdl_hash; 160 struct nfsclownerhead nfsdl_owner; /* locally issued state */ 161 struct nfscllockownerhead nfsdl_lock; 162 nfsv4stateid_t nfsdl_stateid; 163 struct acl_entry nfsdl_ace; /* Delegation ace */ 164 struct nfsclclient *nfsdl_clp; 165 struct nfsv4lock nfsdl_rwlock; /* for active I/O ops */ 166 struct nfscred nfsdl_cred; /* Cred. used for Open */ 167 time_t nfsdl_timestamp; /* used for stale cleanup */ 168 u_int64_t nfsdl_sizelimit; /* Limit for file growth */ 169 u_int64_t nfsdl_size; /* saved copy of file size */ 170 u_int64_t nfsdl_change; /* and change attribute */ 171 struct timespec nfsdl_modtime; /* local modify time */ 172 u_int16_t nfsdl_fhlen; 173 u_int8_t nfsdl_flags; 174 u_int8_t nfsdl_fh[1]; /* must be last */ 175 }; 176 177 /* 178 * nfsdl_flags bits. 179 */ 180 #define NFSCLDL_READ 0x01 181 #define NFSCLDL_WRITE 0x02 182 #define NFSCLDL_RECALL 0x04 183 #define NFSCLDL_NEEDRECLAIM 0x08 184 #define NFSCLDL_ZAPPED 0x10 185 #define NFSCLDL_MODTIMESET 0x20 186 #define NFSCLDL_DELEGRET 0x40 187 188 /* 189 * MALLOC'd to the correct length to accommodate the file handle. 190 */ 191 struct nfsclopen { 192 LIST_ENTRY(nfsclopen) nfso_list; 193 LIST_ENTRY(nfsclopen) nfso_hash; 194 struct nfscllockownerhead nfso_lock; 195 nfsv4stateid_t nfso_stateid; 196 struct nfsclowner *nfso_own; 197 struct nfscred nfso_cred; /* Cred. used for Open */ 198 u_int32_t nfso_mode; 199 u_int32_t nfso_opencnt; 200 u_int16_t nfso_fhlen; 201 u_int8_t nfso_posixlock; /* 1 for POSIX type locking */ 202 u_int8_t nfso_fh[1]; /* must be last */ 203 }; 204 205 /* 206 * Return values for nfscl_open(). NFSCLOPEN_OK must == 0. 207 */ 208 #define NFSCLOPEN_OK 0 209 #define NFSCLOPEN_DOOPEN 1 210 #define NFSCLOPEN_DOOPENDOWNGRADE 2 211 #define NFSCLOPEN_SETCRED 3 212 213 struct nfscllockowner { 214 LIST_ENTRY(nfscllockowner) nfsl_list; 215 struct nfscllockhead nfsl_lock; 216 struct nfsclopen *nfsl_open; 217 NFSPROC_T *nfsl_inprog; 218 nfsv4stateid_t nfsl_stateid; 219 int nfsl_lockflags; 220 u_int32_t nfsl_seqid; 221 struct nfsv4lock nfsl_rwlock; 222 u_int8_t nfsl_owner[NFSV4CL_LOCKNAMELEN]; 223 u_int8_t nfsl_openowner[NFSV4CL_LOCKNAMELEN]; 224 }; 225 226 /* 227 * Byte range entry for the above lock owner. 228 */ 229 struct nfscllock { 230 LIST_ENTRY(nfscllock) nfslo_list; 231 u_int64_t nfslo_first; 232 u_int64_t nfslo_end; 233 short nfslo_type; 234 }; 235 236 /* This structure is used to collect a list of lockowners to free up. */ 237 struct nfscllockownerfh { 238 SLIST_ENTRY(nfscllockownerfh) nfslfh_list; 239 struct nfscllockownerhead nfslfh_lock; 240 int nfslfh_len; 241 uint8_t nfslfh_fh[NFSX_V4FHMAX]; 242 }; 243 244 /* 245 * MALLOC'd to the correct length to accommodate the file handle. 246 */ 247 struct nfscllayout { 248 TAILQ_ENTRY(nfscllayout) nfsly_list; 249 LIST_ENTRY(nfscllayout) nfsly_hash; 250 nfsv4stateid_t nfsly_stateid; 251 struct nfsv4lock nfsly_lock; 252 uint64_t nfsly_filesid[2]; 253 uint64_t nfsly_lastbyte; 254 struct nfsclflayouthead nfsly_flayread; 255 struct nfsclflayouthead nfsly_flayrw; 256 struct nfsclrecalllayouthead nfsly_recall; 257 time_t nfsly_timestamp; 258 struct nfsclclient *nfsly_clp; 259 uint16_t nfsly_flags; 260 uint16_t nfsly_fhlen; 261 uint8_t nfsly_fh[1]; 262 }; 263 264 /* 265 * Flags for nfsly_flags. 266 */ 267 #define NFSLY_FILES 0x0001 268 #define NFSLY_BLOCK 0x0002 269 #define NFSLY_OBJECT 0x0004 270 #define NFSLY_RECALL 0x0008 271 #define NFSLY_RECALLFILE 0x0010 272 #define NFSLY_RECALLFSID 0x0020 273 #define NFSLY_RECALLALL 0x0040 274 #define NFSLY_RETONCLOSE 0x0080 275 #define NFSLY_WRITTEN 0x0100 /* Has been used to write to a DS. */ 276 #define NFSLY_FLEXFILE 0x0200 277 #define NFSLY_RETURNED 0x0400 278 279 /* 280 * Flex file layout mirror specific stuff for nfsclflayout. 281 */ 282 struct nfsffm { 283 nfsv4stateid_t st; 284 struct nfscldevinfo *devp; 285 char dev[NFSX_V4DEVICEID]; 286 uint32_t eff; 287 uid_t user; 288 gid_t group; 289 struct nfsfh *fh[NFSDEV_MAXVERS]; 290 uint16_t fhcnt; 291 }; 292 293 /* 294 * MALLOC'd to the correct length to accommodate the file handle list for File 295 * layout and the list of mirrors for the Flex File Layout. 296 * These hang off of nfsly_flayread and nfsly_flayrw, sorted in increasing 297 * offset order. 298 * The nfsly_flayread list holds the ones with iomode == NFSLAYOUTIOMODE_READ, 299 * whereas the nfsly_flayrw holds the ones with iomode == NFSLAYOUTIOMODE_RW. 300 */ 301 struct nfsclflayout { 302 LIST_ENTRY(nfsclflayout) nfsfl_list; 303 uint64_t nfsfl_off; 304 uint64_t nfsfl_end; 305 uint32_t nfsfl_iomode; 306 uint16_t nfsfl_flags; 307 union { 308 struct { 309 uint64_t patoff; 310 uint32_t util; 311 uint32_t stripe1; 312 uint8_t dev[NFSX_V4DEVICEID]; 313 uint16_t fhcnt; 314 struct nfscldevinfo *devp; 315 } fl; 316 struct { 317 uint64_t stripeunit; 318 uint32_t fflags; 319 uint32_t statshint; 320 uint16_t mirrorcnt; 321 } ff; 322 } nfsfl_un; 323 union { 324 struct nfsfh *fh[0]; /* FH list for DS File layout */ 325 struct nfsffm ffm[0]; /* Mirror list for Flex File */ 326 } nfsfl_un2; /* Must be last. Malloc'd to correct array length */ 327 }; 328 #define nfsfl_patoff nfsfl_un.fl.patoff 329 #define nfsfl_util nfsfl_un.fl.util 330 #define nfsfl_stripe1 nfsfl_un.fl.stripe1 331 #define nfsfl_dev nfsfl_un.fl.dev 332 #define nfsfl_fhcnt nfsfl_un.fl.fhcnt 333 #define nfsfl_devp nfsfl_un.fl.devp 334 #define nfsfl_stripeunit nfsfl_un.ff.stripeunit 335 #define nfsfl_fflags nfsfl_un.ff.fflags 336 #define nfsfl_statshint nfsfl_un.ff.statshint 337 #define nfsfl_mirrorcnt nfsfl_un.ff.mirrorcnt 338 #define nfsfl_fh nfsfl_un2.fh 339 #define nfsfl_ffm nfsfl_un2.ffm 340 341 /* 342 * Flags for nfsfl_flags. 343 */ 344 #define NFSFL_RECALL 0x0001 /* File layout has been recalled */ 345 #define NFSFL_FILE 0x0002 /* File layout */ 346 #define NFSFL_FLEXFILE 0x0004 /* Flex File layout */ 347 348 /* 349 * Structure that is used to store a LAYOUTRECALL. 350 */ 351 struct nfsclrecalllayout { 352 LIST_ENTRY(nfsclrecalllayout) nfsrecly_list; 353 uint64_t nfsrecly_off; 354 uint64_t nfsrecly_len; 355 int nfsrecly_recalltype; 356 uint32_t nfsrecly_iomode; 357 uint32_t nfsrecly_stateseqid; 358 uint32_t nfsrecly_stat; 359 uint32_t nfsrecly_op; 360 char nfsrecly_devid[NFSX_V4DEVICEID]; 361 }; 362 363 /* 364 * Stores the NFSv4.1 Device Info. Malloc'd to the correct length to 365 * store the list of network connections and list of indices. 366 * nfsdi_data[] is allocated the following way: 367 * - nfsdi_addrcnt * struct nfsclds 368 * - stripe indices, each stored as one byte, since there can be many 369 * of them. (This implies a limit of 256 on nfsdi_addrcnt, since the 370 * indices select which address.) 371 * For Flex File, the addrcnt is always one and no stripe indices exist. 372 */ 373 struct nfscldevinfo { 374 LIST_ENTRY(nfscldevinfo) nfsdi_list; 375 uint8_t nfsdi_deviceid[NFSX_V4DEVICEID]; 376 struct nfsclclient *nfsdi_clp; 377 uint32_t nfsdi_refcnt; 378 uint32_t nfsdi_layoutrefs; 379 union { 380 struct { 381 uint16_t stripecnt; 382 } fl; 383 struct { 384 int versindex; 385 uint32_t vers; 386 uint32_t minorvers; 387 uint32_t rsize; 388 uint32_t wsize; 389 } ff; 390 } nfsdi_un; 391 uint16_t nfsdi_addrcnt; 392 uint16_t nfsdi_flags; 393 struct nfsclds *nfsdi_data[0]; 394 }; 395 #define nfsdi_stripecnt nfsdi_un.fl.stripecnt 396 #define nfsdi_versindex nfsdi_un.ff.versindex 397 #define nfsdi_vers nfsdi_un.ff.vers 398 #define nfsdi_minorvers nfsdi_un.ff.minorvers 399 #define nfsdi_rsize nfsdi_un.ff.rsize 400 #define nfsdi_wsize nfsdi_un.ff.wsize 401 402 /* Flags for nfsdi_flags. */ 403 #define NFSDI_FILELAYOUT 0x0001 404 #define NFSDI_FLEXFILE 0x0002 405 #define NFSDI_TIGHTCOUPLED 0X0004 406 407 /* These inline functions return values from nfsdi_data[]. */ 408 /* 409 * Return a pointer to the address at "pos". 410 */ 411 static __inline struct nfsclds ** 412 nfsfldi_addr(struct nfscldevinfo *ndi, int pos) 413 { 414 415 if (pos >= ndi->nfsdi_addrcnt) 416 return (NULL); 417 return (&ndi->nfsdi_data[pos]); 418 } 419 420 /* 421 * Return the Nth ("pos") stripe index. 422 */ 423 static __inline int 424 nfsfldi_stripeindex(struct nfscldevinfo *ndi, int pos) 425 { 426 uint8_t *valp; 427 428 if (pos >= ndi->nfsdi_stripecnt) 429 return (-1); 430 valp = (uint8_t *)&ndi->nfsdi_data[ndi->nfsdi_addrcnt]; 431 valp += pos; 432 return ((int)*valp); 433 } 434 435 /* 436 * Set the Nth ("pos") stripe index to "val". 437 */ 438 static __inline void 439 nfsfldi_setstripeindex(struct nfscldevinfo *ndi, int pos, uint8_t val) 440 { 441 uint8_t *valp; 442 443 if (pos >= ndi->nfsdi_stripecnt) 444 return; 445 valp = (uint8_t *)&ndi->nfsdi_data[ndi->nfsdi_addrcnt]; 446 valp += pos; 447 *valp = val; 448 } 449 450 /* 451 * Macro for incrementing the seqid#. 452 */ 453 #define NFSCL_INCRSEQID(s, n) do { \ 454 if (((n)->nd_flag & ND_INCRSEQID)) \ 455 (s)++; \ 456 } while (0) 457 458 #endif /* _NFS_NFSCLSTATE_H_ */
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