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 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * These functions implement the client side state handling for NFSv4. 33 * NFSv4 state handling: 34 * - A lockowner is used to determine lock contention, so it 35 * corresponds directly to a Posix pid. (1 to 1 mapping) 36 * - The correct granularity of an OpenOwner is not nearly so 37 * obvious. An OpenOwner does the following: 38 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner 39 * - is used to check for Open/SHare contention (not applicable to 40 * this client, since all Opens are Deny_None) 41 * As such, I considered both extrema. 42 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes 43 * all Open, Close and Lock (with a new lockowner) Ops. 44 * 1 OpenOwner for each Open - This one results in an OpenConfirm for 45 * every Open, for most servers. 46 * So, I chose to use the same mapping as I did for LockOwnwers. 47 * The main concern here is that you can end up with multiple Opens 48 * for the same File Handle, but on different OpenOwners (opens 49 * inherited from parents, grandparents...) and you do not know 50 * which of these the vnodeop close applies to. This is handled by 51 * delaying the Close Op(s) until all of the Opens have been closed. 52 * (It is not yet obvious if this is the correct granularity.) 53 * - How the code handles serailization: 54 * - For the ClientId, is uses an exclusive lock while getting its 55 * SetClientId and during recovery. Otherwise, it uses a shared 56 * lock via a reference count. 57 * - For the rest of the data structures, it uses an SMP mutex 58 * (once the nfs client is SMP safe) and doesn't sleep while 59 * manipulating the linked lists. 60 * - The serialization of Open/Close/Lock/LockU falls out in the 61 * "wash", since OpenOwners and LockOwners are both mapped from 62 * Posix pid. In other words, there is only one Posix pid using 63 * any given owner, so that owner is serialized. (If you change 64 * the granularity of the OpenOwner, then code must be added to 65 * serialize Ops on the OpenOwner.) 66 * - When to get rid of OpenOwners and LockOwners. 67 * - When a process exits, it calls nfscl_cleanup(), which goes 68 * through the client list looking for all Open and Lock Owners. 69 * When one is found, it is marked "defunct" or in the case of 70 * an OpenOwner without any Opens, freed. 71 * The renew thread scans for defunct Owners and gets rid of them, 72 * if it can. The LockOwners will also be deleted when the 73 * associated Open is closed. 74 * - If the LockU or Close Op(s) fail during close in a way 75 * that could be recovered upon retry, they are relinked to the 76 * ClientId's defunct open list and retried by the renew thread 77 * until they succeed or an unmount/recovery occurs. 78 * (Since we are done with them, they do not need to be recovered.) 79 */ 80 81 #ifndef APPLEKEXT 82 #include <fs/nfs/nfsport.h> 83 84 /* 85 * Global variables 86 */ 87 extern struct nfsstats newnfsstats; 88 extern struct nfsreqhead nfsd_reqq; 89 NFSREQSPINLOCK; 90 NFSCLSTATEMUTEX; 91 int nfscl_inited = 0; 92 struct nfsclhead nfsclhead; /* Head of clientid list */ 93 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER; 94 #endif /* !APPLEKEXT */ 95 96 static int nfscl_delegcnt = 0; 97 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *, 98 NFSPROC_T *, u_int32_t, struct nfsclowner **, struct nfsclopen **); 99 static void nfscl_clrelease(struct nfsclclient *); 100 static void nfscl_cleanclient(struct nfsclclient *); 101 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 102 struct ucred *, NFSPROC_T *); 103 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 104 struct nfsmount *, struct ucred *, NFSPROC_T *); 105 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *); 106 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 107 struct nfscllock *, int); 108 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 109 struct nfscllock **, int); 110 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *); 111 static u_int32_t nfscl_nextcbident(void); 112 static mount_t nfscl_getmnt(u_int32_t); 113 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 114 int); 115 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 116 u_int8_t *, struct nfscllock **); 117 static void nfscl_freelockowner(struct nfscllockowner *, int); 118 static void nfscl_freealllocks(struct nfscllockownerhead *, int); 119 static int nfscl_localconflict(struct nfsclclient *, struct nfscllock *, 120 u_int8_t *, struct nfscldeleg *, struct nfscllock **); 121 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 122 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 123 struct nfsclopen **, u_int8_t *, u_int8_t *, int, int *); 124 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 125 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 126 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 127 static void nfscl_totalrecall(struct nfsclclient *); 128 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 129 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 130 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 131 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 132 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 133 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 134 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 135 struct ucred *, NFSPROC_T *); 136 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 137 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 138 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *); 139 static int nfscl_errmap(struct nfsrv_descript *); 140 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 141 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 142 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *); 143 static void nfscl_freeopenowner(struct nfsclowner *, int); 144 static void nfscl_cleandeleg(struct nfscldeleg *); 145 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 146 struct nfsmount *, NFSPROC_T *); 147 148 static short nfscberr_null[] = { 149 0, 150 0, 151 }; 152 153 static short nfscberr_getattr[] = { 154 NFSERR_RESOURCE, 155 NFSERR_BADHANDLE, 156 NFSERR_BADXDR, 157 NFSERR_RESOURCE, 158 NFSERR_SERVERFAULT, 159 0, 160 }; 161 162 static short nfscberr_recall[] = { 163 NFSERR_RESOURCE, 164 NFSERR_BADHANDLE, 165 NFSERR_BADSTATEID, 166 NFSERR_BADXDR, 167 NFSERR_RESOURCE, 168 NFSERR_SERVERFAULT, 169 0, 170 }; 171 172 static short *nfscl_cberrmap[] = { 173 nfscberr_null, 174 nfscberr_null, 175 nfscberr_null, 176 nfscberr_getattr, 177 nfscberr_recall 178 }; 179 180 #define NETFAMILY(clp) \ 181 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 182 183 /* 184 * Called for an open operation. 185 * If the nfhp argument is NULL, just get an openowner. 186 */ 187 APPLESTATIC int 188 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 189 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 190 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 191 { 192 struct nfsclclient *clp; 193 struct nfsclowner *owp, *nowp; 194 struct nfsclopen *op = NULL, *nop = NULL; 195 struct nfscldeleg *dp; 196 struct nfsclownerhead *ohp; 197 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 198 int ret; 199 200 if (newonep != NULL) 201 *newonep = 0; 202 if (opp != NULL) 203 *opp = NULL; 204 if (owpp != NULL) 205 *owpp = NULL; 206 207 /* 208 * Might need one or both of these, so MALLOC them now, to 209 * avoid a tsleep() in MALLOC later. 210 */ 211 MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner), 212 M_NFSCLOWNER, M_WAITOK); 213 if (nfhp != NULL) 214 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 215 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 216 ret = nfscl_getcl(vp, cred, p, &clp); 217 if (ret != 0) { 218 FREE((caddr_t)nowp, M_NFSCLOWNER); 219 if (nop != NULL) 220 FREE((caddr_t)nop, M_NFSCLOPEN); 221 return (ret); 222 } 223 224 /* 225 * Get the Open iff it already exists. 226 * If none found, add the new one or return error, depending upon 227 * "create". 228 */ 229 nfscl_filllockowner(p, own); 230 NFSLOCKCLSTATE(); 231 dp = NULL; 232 /* First check the delegation list */ 233 if (nfhp != NULL && usedeleg) { 234 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 235 if (dp->nfsdl_fhlen == fhlen && 236 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 237 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 238 (dp->nfsdl_flags & NFSCLDL_WRITE)) 239 break; 240 dp = NULL; 241 break; 242 } 243 } 244 } 245 246 if (dp != NULL) 247 ohp = &dp->nfsdl_owner; 248 else 249 ohp = &clp->nfsc_owner; 250 /* Now, search for an openowner */ 251 LIST_FOREACH(owp, ohp, nfsow_list) { 252 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 253 break; 254 } 255 256 /* 257 * Create a new open, as required. 258 */ 259 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 260 newonep); 261 262 /* 263 * Serialize modifications to the open owner for multiple threads 264 * within the same process using a read/write sleep lock. 265 */ 266 if (lockit) 267 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 268 NFSUNLOCKCLSTATE(); 269 if (nowp != NULL) 270 FREE((caddr_t)nowp, M_NFSCLOWNER); 271 if (nop != NULL) 272 FREE((caddr_t)nop, M_NFSCLOPEN); 273 if (owpp != NULL) 274 *owpp = owp; 275 if (opp != NULL) 276 *opp = op; 277 if (retp != NULL) 278 *retp = NFSCLOPEN_OK; 279 280 /* 281 * Now, check the mode on the open and return the appropriate 282 * value. 283 */ 284 if (op != NULL && (amode & ~(op->nfso_mode))) { 285 op->nfso_mode |= amode; 286 if (retp != NULL && dp == NULL) 287 *retp = NFSCLOPEN_DOOPEN; 288 } 289 return (0); 290 } 291 292 /* 293 * Create a new open, as required. 294 */ 295 static void 296 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 297 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 298 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 299 int *newonep) 300 { 301 struct nfsclowner *owp = *owpp, *nowp; 302 struct nfsclopen *op, *nop; 303 304 if (nowpp != NULL) 305 nowp = *nowpp; 306 else 307 nowp = NULL; 308 if (nopp != NULL) 309 nop = *nopp; 310 else 311 nop = NULL; 312 if (owp == NULL && nowp != NULL) { 313 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 314 LIST_INIT(&nowp->nfsow_open); 315 nowp->nfsow_clp = clp; 316 nowp->nfsow_seqid = 0; 317 nowp->nfsow_defunct = 0; 318 nfscl_lockinit(&nowp->nfsow_rwlock); 319 if (dp != NULL) { 320 newnfsstats.cllocalopenowners++; 321 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 322 } else { 323 newnfsstats.clopenowners++; 324 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 325 } 326 owp = *owpp = nowp; 327 *nowpp = NULL; 328 if (newonep != NULL) 329 *newonep = 1; 330 } 331 332 /* If an fhp has been specified, create an Open as well. */ 333 if (fhp != NULL) { 334 /* and look for the correct open, based upon FH */ 335 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 336 if (op->nfso_fhlen == fhlen && 337 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 338 break; 339 } 340 if (op == NULL && nop != NULL) { 341 nop->nfso_own = owp; 342 nop->nfso_mode = 0; 343 nop->nfso_opencnt = 0; 344 nop->nfso_posixlock = 1; 345 nop->nfso_fhlen = fhlen; 346 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 347 LIST_INIT(&nop->nfso_lock); 348 nop->nfso_stateid.seqid = 0; 349 nop->nfso_stateid.other[0] = 0; 350 nop->nfso_stateid.other[1] = 0; 351 nop->nfso_stateid.other[2] = 0; 352 if (dp != NULL) { 353 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 354 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 355 nfsdl_list); 356 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 357 newnfsstats.cllocalopens++; 358 } else { 359 newnfsstats.clopens++; 360 } 361 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 362 *opp = nop; 363 *nopp = NULL; 364 if (newonep != NULL) 365 *newonep = 1; 366 } else { 367 *opp = op; 368 } 369 } 370 } 371 372 /* 373 * Called to find/add a delegation to a client. 374 */ 375 APPLESTATIC int 376 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 377 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 378 { 379 struct nfscldeleg *dp = *dpp, *tdp; 380 381 /* 382 * First, if we have received a Read delegation for a file on a 383 * read/write file system, just return it, because they aren't 384 * useful, imho. 385 */ 386 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) && 387 (dp->nfsdl_flags & NFSCLDL_READ)) { 388 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p); 389 FREE((caddr_t)dp, M_NFSCLDELEG); 390 *dpp = NULL; 391 return (0); 392 } 393 394 /* Look for the correct deleg, based upon FH */ 395 NFSLOCKCLSTATE(); 396 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 397 if (tdp == NULL) { 398 if (dp == NULL) { 399 NFSUNLOCKCLSTATE(); 400 return (NFSERR_BADSTATEID); 401 } 402 *dpp = NULL; 403 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 404 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 405 nfsdl_hash); 406 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 407 newnfsstats.cldelegates++; 408 nfscl_delegcnt++; 409 } else { 410 /* 411 * Delegation already exists, what do we do if a new one?? 412 */ 413 if (dp != NULL) { 414 printf("Deleg already exists!\n"); 415 FREE((caddr_t)dp, M_NFSCLDELEG); 416 *dpp = NULL; 417 } else { 418 *dpp = tdp; 419 } 420 } 421 NFSUNLOCKCLSTATE(); 422 return (0); 423 } 424 425 /* 426 * Find a delegation for this file handle. Return NULL upon failure. 427 */ 428 static struct nfscldeleg * 429 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 430 { 431 struct nfscldeleg *dp; 432 433 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 434 if (dp->nfsdl_fhlen == fhlen && 435 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 436 break; 437 } 438 return (dp); 439 } 440 441 /* 442 * Get a stateid for an I/O operation. First, look for an open and iff 443 * found, return either a lockowner stateid or the open stateid. 444 * If no Open is found, just return error and the special stateid of all zeros. 445 */ 446 APPLESTATIC int 447 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 448 struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 449 void **lckpp) 450 { 451 struct nfsclclient *clp; 452 struct nfsclowner *owp; 453 struct nfsclopen *op; 454 struct nfscllockowner *lp; 455 struct nfscldeleg *dp; 456 struct nfsnode *np; 457 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 458 int error, done; 459 460 *lckpp = NULL; 461 /* 462 * Initially, just set the special stateid of all zeros. 463 */ 464 stateidp->seqid = 0; 465 stateidp->other[0] = 0; 466 stateidp->other[1] = 0; 467 stateidp->other[2] = 0; 468 if (vnode_vtype(vp) != VREG) 469 return (EISDIR); 470 np = VTONFS(vp); 471 NFSLOCKCLSTATE(); 472 clp = nfscl_findcl(VFSTONFS(vnode_mount(vp))); 473 if (clp == NULL) { 474 NFSUNLOCKCLSTATE(); 475 return (EACCES); 476 } 477 478 /* 479 * First, look for a delegation. 480 */ 481 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 482 if (dp->nfsdl_fhlen == fhlen && 483 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 484 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 485 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 486 stateidp->seqid = dp->nfsdl_stateid.seqid; 487 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 488 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 489 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 490 if (!(np->n_flag & NDELEGRECALL)) { 491 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 492 nfsdl_list); 493 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 494 nfsdl_list); 495 dp->nfsdl_timestamp = NFSD_MONOSEC + 496 120; 497 dp->nfsdl_rwlock.nfslock_usecnt++; 498 *lckpp = (void *)&dp->nfsdl_rwlock; 499 } 500 NFSUNLOCKCLSTATE(); 501 return (0); 502 } 503 break; 504 } 505 } 506 507 if (p != NULL) { 508 /* 509 * If p != NULL, we want to search the parentage tree 510 * for a matching OpenOwner and use that. 511 */ 512 nfscl_filllockowner(p, own); 513 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, NULL, p, 514 mode, NULL, &op); 515 if (error) { 516 NFSUNLOCKCLSTATE(); 517 return (error); 518 } 519 520 /* now look for a lockowner */ 521 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 522 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 523 stateidp->seqid = lp->nfsl_stateid.seqid; 524 stateidp->other[0] = lp->nfsl_stateid.other[0]; 525 stateidp->other[1] = lp->nfsl_stateid.other[1]; 526 stateidp->other[2] = lp->nfsl_stateid.other[2]; 527 NFSUNLOCKCLSTATE(); 528 return (0); 529 } 530 } 531 } else { 532 /* 533 * If p == NULL, it is a read ahead or write behind, 534 * so just look for any OpenOwner that will work. 535 */ 536 done = 0; 537 owp = LIST_FIRST(&clp->nfsc_owner); 538 while (!done && owp != NULL) { 539 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 540 if (op->nfso_fhlen == fhlen && 541 !NFSBCMP(op->nfso_fh, nfhp, fhlen) && 542 (mode & op->nfso_mode) == mode) { 543 done = 1; 544 break; 545 } 546 } 547 if (!done) 548 owp = LIST_NEXT(owp, nfsow_list); 549 } 550 if (!done) { 551 NFSUNLOCKCLSTATE(); 552 return (ENOENT); 553 } 554 /* for read aheads or write behinds, use the open cred */ 555 newnfs_copycred(&op->nfso_cred, cred); 556 } 557 558 /* 559 * No lock stateid, so return the open stateid. 560 */ 561 stateidp->seqid = op->nfso_stateid.seqid; 562 stateidp->other[0] = op->nfso_stateid.other[0]; 563 stateidp->other[1] = op->nfso_stateid.other[1]; 564 stateidp->other[2] = op->nfso_stateid.other[2]; 565 NFSUNLOCKCLSTATE(); 566 return (0); 567 } 568 569 /* 570 * Get an existing open. Search up the parentage tree for a match and 571 * return with the first one found. 572 */ 573 static int 574 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 575 u_int8_t *rown, NFSPROC_T *p, u_int32_t mode, struct nfsclowner **owpp, 576 struct nfsclopen **opp) 577 { 578 struct nfsclowner *owp = NULL; 579 struct nfsclopen *op; 580 NFSPROC_T *nproc; 581 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp; 582 583 nproc = p; 584 op = NULL; 585 while (op == NULL && (nproc != NULL || rown != NULL)) { 586 if (nproc != NULL) { 587 nfscl_filllockowner(nproc, own); 588 ownp = own; 589 } else { 590 ownp = rown; 591 } 592 /* Search the client list */ 593 LIST_FOREACH(owp, ohp, nfsow_list) { 594 if (!NFSBCMP(owp->nfsow_owner, ownp, 595 NFSV4CL_LOCKNAMELEN)) 596 break; 597 } 598 if (owp != NULL) { 599 /* and look for the correct open */ 600 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 601 if (op->nfso_fhlen == fhlen && 602 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 603 && (op->nfso_mode & mode) == mode) { 604 break; 605 } 606 } 607 } 608 if (rown != NULL) 609 break; 610 if (op == NULL) 611 nproc = nfscl_getparent(nproc); 612 } 613 if (op == NULL) { 614 return (EBADF); 615 } 616 if (owpp) 617 *owpp = owp; 618 *opp = op; 619 return (0); 620 } 621 622 /* 623 * Release use of an open owner. Called when open operations are done 624 * with the open owner. 625 */ 626 APPLESTATIC void 627 nfscl_ownerrelease(struct nfsclowner *owp, __unused int error, 628 __unused int candelete, int unlocked) 629 { 630 631 if (owp == NULL) 632 return; 633 NFSLOCKCLSTATE(); 634 if (!unlocked) 635 nfscl_lockunlock(&owp->nfsow_rwlock); 636 nfscl_clrelease(owp->nfsow_clp); 637 NFSUNLOCKCLSTATE(); 638 } 639 640 /* 641 * Release use of an open structure under an open owner. 642 */ 643 APPLESTATIC void 644 nfscl_openrelease(struct nfsclopen *op, int error, int candelete) 645 { 646 struct nfsclclient *clp; 647 struct nfsclowner *owp; 648 649 if (op == NULL) 650 return; 651 NFSLOCKCLSTATE(); 652 owp = op->nfso_own; 653 nfscl_lockunlock(&owp->nfsow_rwlock); 654 clp = owp->nfsow_clp; 655 if (error && candelete && op->nfso_opencnt == 0) 656 nfscl_freeopen(op, 0); 657 nfscl_clrelease(clp); 658 NFSUNLOCKCLSTATE(); 659 } 660 661 /* 662 * Called to get a clientid structure. It will optionally lock the 663 * client data structures to do the SetClientId/SetClientId_confirm, 664 * but will release that lock and return the clientid with a refernce 665 * count on it. 666 * If the "cred" argument is NULL, a new clientid should not be created. 667 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 668 * be done. 669 * It always clpp with a reference count on it, unless returning an error. 670 */ 671 APPLESTATIC int 672 nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p, 673 struct nfsclclient **clpp) 674 { 675 struct nfsclclient *clp; 676 struct nfsclclient *newclp = NULL; 677 struct nfscllockowner *lp, *nlp; 678 struct nfsmount *nmp = VFSTONFS(vnode_mount(vp)); 679 char uuid[HOSTUUIDLEN]; 680 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 681 u_int16_t idlen = 0; 682 683 if (cred != NULL) { 684 getcredhostuuid(cred, uuid, sizeof uuid); 685 idlen = strlen(uuid); 686 if (idlen > 0) 687 idlen += sizeof (u_int64_t); 688 else 689 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 690 MALLOC(newclp, struct nfsclclient *, 691 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 692 M_WAITOK); 693 } 694 NFSLOCKCLSTATE(); 695 clp = nmp->nm_clp; 696 if (clp == NULL) { 697 if (newclp == NULL) { 698 NFSUNLOCKCLSTATE(); 699 return (EACCES); 700 } 701 clp = newclp; 702 NFSBZERO((caddr_t)clp, sizeof(struct nfsclclient) + idlen - 1); 703 clp->nfsc_idlen = idlen; 704 LIST_INIT(&clp->nfsc_owner); 705 TAILQ_INIT(&clp->nfsc_deleg); 706 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 707 LIST_INIT(&clp->nfsc_deleghash[i]); 708 LIST_INIT(&clp->nfsc_defunctlockowner); 709 clp->nfsc_flags = NFSCLFLAGS_INITED; 710 clp->nfsc_clientidrev = 1; 711 clp->nfsc_cbident = nfscl_nextcbident(); 712 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 713 clp->nfsc_idlen); 714 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 715 nmp->nm_clp = clp; 716 clp->nfsc_nmp = nmp; 717 NFSUNLOCKCLSTATE(); 718 nfscl_start_renewthread(clp); 719 } else { 720 NFSUNLOCKCLSTATE(); 721 if (newclp != NULL) 722 FREE((caddr_t)newclp, M_NFSCLCLIENT); 723 } 724 NFSLOCKCLSTATE(); 725 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock) 726 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 727 NFSCLSTATEMUTEXPTR); 728 if (!igotlock) 729 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR); 730 NFSUNLOCKCLSTATE(); 731 732 /* 733 * If it needs a clientid, do the setclientid now. 734 */ 735 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 736 if (!igotlock) 737 panic("nfscl_clget"); 738 if (p == NULL || cred == NULL) { 739 NFSLOCKCLSTATE(); 740 nfsv4_unlock(&clp->nfsc_lock, 0); 741 NFSUNLOCKCLSTATE(); 742 return (EACCES); 743 } 744 /* get rid of defunct lockowners */ 745 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, 746 nlp) { 747 nfscl_freelockowner(lp, 0); 748 } 749 /* 750 * If RFC3530 Sec. 14.2.33 is taken literally, 751 * NFSERR_CLIDINUSE will be returned persistently for the 752 * case where a new mount of the same file system is using 753 * a different principal. In practice, NFSERR_CLIDINUSE is 754 * only returned when there is outstanding unexpired state 755 * on the clientid. As such, try for twice the lease 756 * interval, if we know what that is. Otherwise, make a 757 * wild ass guess. 758 * The case of returning NFSERR_STALECLIENTID is far less 759 * likely, but might occur if there is a significant delay 760 * between doing the SetClientID and SetClientIDConfirm Ops, 761 * such that the server throws away the clientid before 762 * receiving the SetClientIDConfirm. 763 */ 764 if (clp->nfsc_renew > 0) 765 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 766 else 767 clidinusedelay = 120; 768 trystalecnt = 3; 769 do { 770 error = nfsrpc_setclient(VFSTONFS(vnode_mount(vp)), 771 clp, cred, p); 772 if (error == NFSERR_STALECLIENTID || 773 error == NFSERR_STALEDONTRECOVER || 774 error == NFSERR_CLIDINUSE) { 775 (void) nfs_catnap(PZERO, "nfs_setcl"); 776 } 777 } while (((error == NFSERR_STALECLIENTID || 778 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 779 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 780 if (error) { 781 NFSLOCKCLSTATE(); 782 nfsv4_unlock(&clp->nfsc_lock, 0); 783 NFSUNLOCKCLSTATE(); 784 return (error); 785 } 786 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 787 } 788 if (igotlock) { 789 NFSLOCKCLSTATE(); 790 nfsv4_unlock(&clp->nfsc_lock, 1); 791 NFSUNLOCKCLSTATE(); 792 } 793 794 *clpp = clp; 795 return (0); 796 } 797 798 /* 799 * Get a reference to a clientid and return it, if valid. 800 */ 801 APPLESTATIC struct nfsclclient * 802 nfscl_findcl(struct nfsmount *nmp) 803 { 804 struct nfsclclient *clp; 805 806 clp = nmp->nm_clp; 807 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 808 return (NULL); 809 return (clp); 810 } 811 812 /* 813 * Release the clientid structure. It may be locked or reference counted. 814 */ 815 static void 816 nfscl_clrelease(struct nfsclclient *clp) 817 { 818 819 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 820 nfsv4_unlock(&clp->nfsc_lock, 0); 821 else 822 nfsv4_relref(&clp->nfsc_lock); 823 } 824 825 /* 826 * External call for nfscl_clrelease. 827 */ 828 APPLESTATIC void 829 nfscl_clientrelease(struct nfsclclient *clp) 830 { 831 832 NFSLOCKCLSTATE(); 833 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 834 nfsv4_unlock(&clp->nfsc_lock, 0); 835 else 836 nfsv4_relref(&clp->nfsc_lock); 837 NFSUNLOCKCLSTATE(); 838 } 839 840 /* 841 * Called when wanting to lock a byte region. 842 */ 843 APPLESTATIC int 844 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 845 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 846 int recovery, u_int8_t *rownp, u_int8_t *ropenownp, 847 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 848 { 849 struct nfscllockowner *lp; 850 struct nfsclopen *op; 851 struct nfsclclient *clp; 852 struct nfscllockowner *nlp; 853 struct nfscllock *nlop, *otherlop; 854 struct nfscldeleg *dp = NULL, *ldp = NULL; 855 struct nfscllockownerhead *lhp = NULL; 856 struct nfsnode *np; 857 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp; 858 int error = 0, ret, donelocally = 0; 859 u_int32_t mode; 860 861 if (type == F_WRLCK) 862 mode = NFSV4OPEN_ACCESSWRITE; 863 else 864 mode = NFSV4OPEN_ACCESSREAD; 865 np = VTONFS(vp); 866 *lpp = NULL; 867 *newonep = 0; 868 *donelocallyp = 0; 869 870 /* 871 * Might need these, so MALLOC them now, to 872 * avoid a tsleep() in MALLOC later. 873 */ 874 MALLOC(nlp, struct nfscllockowner *, 875 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 876 MALLOC(otherlop, struct nfscllock *, 877 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 878 MALLOC(nlop, struct nfscllock *, 879 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 880 nlop->nfslo_type = type; 881 nlop->nfslo_first = off; 882 if (len == NFS64BITSSET) { 883 nlop->nfslo_end = NFS64BITSSET; 884 } else { 885 nlop->nfslo_end = off + len; 886 if (nlop->nfslo_end <= nlop->nfslo_first) 887 error = NFSERR_INVAL; 888 } 889 890 if (!error) { 891 if (recovery) 892 clp = rclp; 893 else 894 error = nfscl_getcl(vp, cred, p, &clp); 895 } 896 if (error) { 897 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 898 FREE((caddr_t)otherlop, M_NFSCLLOCK); 899 FREE((caddr_t)nlop, M_NFSCLLOCK); 900 return (error); 901 } 902 903 op = NULL; 904 if (recovery) { 905 ownp = rownp; 906 } else { 907 nfscl_filllockowner(p, own); 908 ownp = own; 909 } 910 if (!recovery) { 911 NFSLOCKCLSTATE(); 912 /* 913 * First, search for a delegation. If one exists for this file, 914 * the lock can be done locally against it, so long as there 915 * isn't a local lock conflict. 916 */ 917 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 918 np->n_fhp->nfh_len); 919 /* Just sanity check for correct type of delegation */ 920 if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_RECALL) || 921 (type == F_WRLCK && !(dp->nfsdl_flags & NFSCLDL_WRITE)))) 922 dp = NULL; 923 } 924 if (dp != NULL) { 925 /* Now, find the associated open to get the correct openowner */ 926 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 927 np->n_fhp->nfh_len, NULL, p, mode, NULL, &op); 928 if (ret) 929 ret = nfscl_getopen(&clp->nfsc_owner, 930 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, NULL, p, 931 mode, NULL, &op); 932 if (!ret) { 933 lhp = &dp->nfsdl_lock; 934 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 935 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 936 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 937 donelocally = 1; 938 } else { 939 dp = NULL; 940 } 941 } 942 if (!donelocally) { 943 /* 944 * Get the related Open. 945 */ 946 if (recovery) 947 error = nfscl_getopen(&clp->nfsc_owner, 948 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, ropenownp, 949 NULL, mode, NULL, &op); 950 else 951 error = nfscl_getopen(&clp->nfsc_owner, 952 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, NULL, p, 953 mode, NULL, &op); 954 if (!error) 955 lhp = &op->nfso_lock; 956 } 957 if (!error && !recovery) 958 error = nfscl_localconflict(clp, nlop, ownp, ldp, NULL); 959 if (error) { 960 if (!recovery) { 961 nfscl_clrelease(clp); 962 NFSUNLOCKCLSTATE(); 963 } 964 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 965 FREE((caddr_t)otherlop, M_NFSCLLOCK); 966 FREE((caddr_t)nlop, M_NFSCLLOCK); 967 return (error); 968 } 969 970 /* 971 * Ok, see if a lockowner exists and create one, as required. 972 */ 973 LIST_FOREACH(lp, lhp, nfsl_list) { 974 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 975 break; 976 } 977 if (lp == NULL) { 978 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 979 if (recovery) 980 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 981 NFSV4CL_LOCKNAMELEN); 982 else 983 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 984 NFSV4CL_LOCKNAMELEN); 985 nlp->nfsl_seqid = 0; 986 nlp->nfsl_defunct = 0; 987 nlp->nfsl_inprog = NULL; 988 nfscl_lockinit(&nlp->nfsl_rwlock); 989 LIST_INIT(&nlp->nfsl_lock); 990 if (donelocally) { 991 nlp->nfsl_open = NULL; 992 newnfsstats.cllocallockowners++; 993 } else { 994 nlp->nfsl_open = op; 995 newnfsstats.cllockowners++; 996 } 997 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 998 lp = nlp; 999 nlp = NULL; 1000 *newonep = 1; 1001 } 1002 1003 /* 1004 * Now, update the byte ranges for locks. 1005 */ 1006 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1007 if (!ret) 1008 donelocally = 1; 1009 if (donelocally) { 1010 *donelocallyp = 1; 1011 if (!recovery) 1012 nfscl_clrelease(clp); 1013 } else { 1014 /* 1015 * Serial modifications on the lock owner for multiple threads 1016 * for the same process using a read/write lock. 1017 */ 1018 if (!recovery) 1019 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1020 } 1021 if (!recovery) 1022 NFSUNLOCKCLSTATE(); 1023 1024 if (nlp) 1025 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1026 if (nlop) 1027 FREE((caddr_t)nlop, M_NFSCLLOCK); 1028 if (otherlop) 1029 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1030 1031 *lpp = lp; 1032 return (0); 1033 } 1034 1035 /* 1036 * Called to unlock a byte range, for LockU. 1037 */ 1038 APPLESTATIC int 1039 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1040 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1041 struct nfsclclient *clp, struct nfscllockowner **lpp, int *dorpcp) 1042 { 1043 struct nfscllockowner *lp; 1044 struct nfsclowner *owp; 1045 struct nfsclopen *op; 1046 struct nfscllock *nlop, *other_lop = NULL; 1047 struct nfscldeleg *dp; 1048 struct nfsnode *np; 1049 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1050 int ret = 0, fnd, error; 1051 1052 np = VTONFS(vp); 1053 *lpp = NULL; 1054 *dorpcp = 0; 1055 1056 /* 1057 * Might need these, so MALLOC them now, to 1058 * avoid a tsleep() in MALLOC later. 1059 */ 1060 MALLOC(nlop, struct nfscllock *, 1061 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1062 nlop->nfslo_type = F_UNLCK; 1063 nlop->nfslo_first = off; 1064 if (len == NFS64BITSSET) { 1065 nlop->nfslo_end = NFS64BITSSET; 1066 } else { 1067 nlop->nfslo_end = off + len; 1068 if (nlop->nfslo_end <= nlop->nfslo_first) { 1069 FREE((caddr_t)nlop, M_NFSCLLOCK); 1070 return (NFSERR_INVAL); 1071 } 1072 } 1073 if (callcnt == 0) { 1074 MALLOC(other_lop, struct nfscllock *, 1075 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1076 *other_lop = *nlop; 1077 } 1078 nfscl_filllockowner(p, own); 1079 dp = NULL; 1080 NFSLOCKCLSTATE(); 1081 if (callcnt == 0) 1082 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1083 np->n_fhp->nfh_len); 1084 1085 /* Search for a local conflict. */ 1086 error = nfscl_localconflict(clp, nlop, own, dp, NULL); 1087 if (error) { 1088 NFSUNLOCKCLSTATE(); 1089 FREE((caddr_t)nlop, M_NFSCLLOCK); 1090 if (other_lop != NULL) 1091 FREE((caddr_t)other_lop, M_NFSCLLOCK); 1092 return (error); 1093 } 1094 1095 /* 1096 * First, unlock any local regions on a delegation. 1097 */ 1098 if (dp != NULL) { 1099 /* Look for this lockowner. */ 1100 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1101 if (!NFSBCMP(lp->nfsl_owner, own, 1102 NFSV4CL_LOCKNAMELEN)) 1103 break; 1104 } 1105 if (lp != NULL) 1106 /* Use other_lop, so nlop is still available */ 1107 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1108 } 1109 1110 /* 1111 * Now, find a matching open/lockowner that hasn't already been done, 1112 * as marked by nfsl_inprog. 1113 */ 1114 lp = NULL; 1115 fnd = 0; 1116 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1117 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1118 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1119 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1120 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1121 if (lp->nfsl_inprog == NULL && 1122 !NFSBCMP(lp->nfsl_owner, own, 1123 NFSV4CL_LOCKNAMELEN)) { 1124 fnd = 1; 1125 break; 1126 } 1127 } 1128 if (fnd) 1129 break; 1130 } 1131 } 1132 if (fnd) 1133 break; 1134 } 1135 1136 if (lp != NULL) { 1137 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1138 if (ret) 1139 *dorpcp = 1; 1140 /* 1141 * Serial modifications on the lock owner for multiple 1142 * threads for the same process using a read/write lock. 1143 */ 1144 lp->nfsl_inprog = p; 1145 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1146 *lpp = lp; 1147 } 1148 NFSUNLOCKCLSTATE(); 1149 if (nlop) 1150 FREE((caddr_t)nlop, M_NFSCLLOCK); 1151 if (other_lop) 1152 FREE((caddr_t)other_lop, M_NFSCLLOCK); 1153 return (0); 1154 } 1155 1156 /* 1157 * Release all lockowners marked in progess for this process and file. 1158 */ 1159 APPLESTATIC void 1160 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p) 1161 { 1162 struct nfsclowner *owp; 1163 struct nfsclopen *op; 1164 struct nfscllockowner *lp; 1165 struct nfsnode *np; 1166 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1167 1168 np = VTONFS(vp); 1169 nfscl_filllockowner(p, own); 1170 NFSLOCKCLSTATE(); 1171 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1172 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1173 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1174 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1175 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1176 if (lp->nfsl_inprog == p && 1177 !NFSBCMP(lp->nfsl_owner, own, 1178 NFSV4CL_LOCKNAMELEN)) { 1179 lp->nfsl_inprog = NULL; 1180 nfscl_lockunlock(&lp->nfsl_rwlock); 1181 } 1182 } 1183 } 1184 } 1185 } 1186 nfscl_clrelease(clp); 1187 NFSUNLOCKCLSTATE(); 1188 } 1189 1190 /* 1191 * Called to find out if any bytes within the byte range specified are 1192 * write locked by the calling process. Used to determine if flushing 1193 * is required before a LockU. 1194 * If in doubt, return 1, so the flush will occur. 1195 */ 1196 APPLESTATIC int 1197 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1198 struct ucred *cred, NFSPROC_T *p) 1199 { 1200 struct nfsclowner *owp; 1201 struct nfscllockowner *lp; 1202 struct nfsclopen *op; 1203 struct nfsclclient *clp; 1204 struct nfscllock *lop; 1205 struct nfscldeleg *dp; 1206 struct nfsnode *np; 1207 u_int64_t off, end; 1208 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1209 int error = 0; 1210 1211 np = VTONFS(vp); 1212 switch (fl->l_whence) { 1213 case SEEK_SET: 1214 case SEEK_CUR: 1215 /* 1216 * Caller is responsible for adding any necessary offset 1217 * when SEEK_CUR is used. 1218 */ 1219 off = fl->l_start; 1220 break; 1221 case SEEK_END: 1222 off = np->n_size + fl->l_start; 1223 break; 1224 default: 1225 return (1); 1226 }; 1227 if (fl->l_len != 0) { 1228 end = off + fl->l_len; 1229 if (end < off) 1230 return (1); 1231 } else { 1232 end = NFS64BITSSET; 1233 } 1234 1235 error = nfscl_getcl(vp, cred, p, &clp); 1236 if (error) 1237 return (1); 1238 nfscl_filllockowner(p, own); 1239 NFSLOCKCLSTATE(); 1240 1241 /* 1242 * First check the delegation locks. 1243 */ 1244 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1245 if (dp != NULL) { 1246 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1247 if (!NFSBCMP(lp->nfsl_owner, own, 1248 NFSV4CL_LOCKNAMELEN)) 1249 break; 1250 } 1251 if (lp != NULL) { 1252 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1253 if (lop->nfslo_first >= end) 1254 break; 1255 if (lop->nfslo_end <= off) 1256 continue; 1257 if (lop->nfslo_type == F_WRLCK) { 1258 nfscl_clrelease(clp); 1259 NFSUNLOCKCLSTATE(); 1260 return (1); 1261 } 1262 } 1263 } 1264 } 1265 1266 /* 1267 * Now, check state against the server. 1268 */ 1269 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1270 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1271 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1272 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1273 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1274 if (!NFSBCMP(lp->nfsl_owner, own, 1275 NFSV4CL_LOCKNAMELEN)) 1276 break; 1277 } 1278 if (lp != NULL) { 1279 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1280 if (lop->nfslo_first >= end) 1281 break; 1282 if (lop->nfslo_end <= off) 1283 continue; 1284 if (lop->nfslo_type == F_WRLCK) { 1285 nfscl_clrelease(clp); 1286 NFSUNLOCKCLSTATE(); 1287 return (1); 1288 } 1289 } 1290 } 1291 } 1292 } 1293 } 1294 nfscl_clrelease(clp); 1295 NFSUNLOCKCLSTATE(); 1296 return (0); 1297 } 1298 1299 /* 1300 * Release a byte range lock owner structure. 1301 */ 1302 APPLESTATIC void 1303 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1304 { 1305 struct nfsclclient *clp; 1306 1307 if (lp == NULL) 1308 return; 1309 NFSLOCKCLSTATE(); 1310 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1311 if (error != 0 && candelete && 1312 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1313 nfscl_freelockowner(lp, 0); 1314 else 1315 nfscl_lockunlock(&lp->nfsl_rwlock); 1316 nfscl_clrelease(clp); 1317 NFSUNLOCKCLSTATE(); 1318 } 1319 1320 /* 1321 * Free up an open structure and any associated byte range lock structures. 1322 */ 1323 APPLESTATIC void 1324 nfscl_freeopen(struct nfsclopen *op, int local) 1325 { 1326 1327 LIST_REMOVE(op, nfso_list); 1328 nfscl_freealllocks(&op->nfso_lock, local); 1329 FREE((caddr_t)op, M_NFSCLOPEN); 1330 if (local) 1331 newnfsstats.cllocalopens--; 1332 else 1333 newnfsstats.clopens--; 1334 } 1335 1336 /* 1337 * Free up all lock owners and associated locks. 1338 */ 1339 static void 1340 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1341 { 1342 struct nfscllockowner *lp, *nlp; 1343 1344 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1345 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1346 panic("nfscllckw"); 1347 nfscl_freelockowner(lp, local); 1348 } 1349 } 1350 1351 /* 1352 * Called for an Open when NFSERR_EXPIRED is received from the server. 1353 * If there are no byte range locks nor a Share Deny lost, try to do a 1354 * fresh Open. Otherwise, free the open. 1355 */ 1356 static int 1357 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1358 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1359 { 1360 struct nfscllockowner *lp; 1361 struct nfscldeleg *dp; 1362 int mustdelete = 0, error; 1363 1364 /* 1365 * Look for any byte range lock(s). 1366 */ 1367 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1368 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1369 mustdelete = 1; 1370 break; 1371 } 1372 } 1373 1374 /* 1375 * If no byte range lock(s) nor a Share deny, try to re-open. 1376 */ 1377 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1378 newnfs_copycred(&op->nfso_cred, cred); 1379 dp = NULL; 1380 error = nfsrpc_reopen(nmp, op->nfso_fh, 1381 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1382 if (error) { 1383 mustdelete = 1; 1384 if (dp != NULL) { 1385 FREE((caddr_t)dp, M_NFSCLDELEG); 1386 dp = NULL; 1387 } 1388 } 1389 if (dp != NULL) 1390 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1391 op->nfso_fhlen, cred, p, &dp); 1392 } 1393 1394 /* 1395 * If a byte range lock or Share deny or couldn't re-open, free it. 1396 */ 1397 if (mustdelete) 1398 nfscl_freeopen(op, 0); 1399 return (mustdelete); 1400 } 1401 1402 /* 1403 * Free up an open owner structure. 1404 */ 1405 static void 1406 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1407 { 1408 1409 LIST_REMOVE(owp, nfsow_list); 1410 FREE((caddr_t)owp, M_NFSCLOWNER); 1411 if (local) 1412 newnfsstats.cllocalopenowners--; 1413 else 1414 newnfsstats.clopenowners--; 1415 } 1416 1417 /* 1418 * Free up a byte range lock owner structure. 1419 */ 1420 static void 1421 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1422 { 1423 struct nfscllock *lop, *nlop; 1424 1425 LIST_REMOVE(lp, nfsl_list); 1426 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1427 nfscl_freelock(lop, local); 1428 } 1429 FREE((caddr_t)lp, M_NFSCLLOCKOWNER); 1430 if (local) 1431 newnfsstats.cllocallockowners--; 1432 else 1433 newnfsstats.cllockowners--; 1434 } 1435 1436 /* 1437 * Free up a byte range lock structure. 1438 */ 1439 APPLESTATIC void 1440 nfscl_freelock(struct nfscllock *lop, int local) 1441 { 1442 1443 LIST_REMOVE(lop, nfslo_list); 1444 FREE((caddr_t)lop, M_NFSCLLOCK); 1445 if (local) 1446 newnfsstats.cllocallocks--; 1447 else 1448 newnfsstats.cllocks--; 1449 } 1450 1451 /* 1452 * Clean out the state related to a delegation. 1453 */ 1454 static void 1455 nfscl_cleandeleg(struct nfscldeleg *dp) 1456 { 1457 struct nfsclowner *owp, *nowp; 1458 struct nfsclopen *op; 1459 1460 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1461 op = LIST_FIRST(&owp->nfsow_open); 1462 if (op != NULL) { 1463 if (LIST_NEXT(op, nfso_list) != NULL) 1464 panic("nfscleandel"); 1465 nfscl_freeopen(op, 1); 1466 } 1467 nfscl_freeopenowner(owp, 1); 1468 } 1469 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1470 } 1471 1472 /* 1473 * Free a delegation. 1474 */ 1475 static void 1476 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1477 { 1478 1479 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1480 LIST_REMOVE(dp, nfsdl_hash); 1481 FREE((caddr_t)dp, M_NFSCLDELEG); 1482 newnfsstats.cldelegates--; 1483 nfscl_delegcnt--; 1484 } 1485 1486 /* 1487 * Free up all state related to this client structure. 1488 */ 1489 static void 1490 nfscl_cleanclient(struct nfsclclient *clp) 1491 { 1492 struct nfsclowner *owp, *nowp; 1493 struct nfsclopen *op, *nop; 1494 struct nfscllockowner *lp, *nlp; 1495 1496 1497 /* get rid of defunct lockowners */ 1498 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, nlp) { 1499 nfscl_freelockowner(lp, 0); 1500 } 1501 1502 /* Now, all the OpenOwners, etc. */ 1503 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1504 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1505 nfscl_freeopen(op, 0); 1506 } 1507 nfscl_freeopenowner(owp, 0); 1508 } 1509 } 1510 1511 /* 1512 * Called when an NFSERR_EXPIRED is received from the server. 1513 */ 1514 static void 1515 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1516 struct ucred *cred, NFSPROC_T *p) 1517 { 1518 struct nfsclowner *owp, *nowp, *towp; 1519 struct nfsclopen *op, *nop, *top; 1520 struct nfscldeleg *dp, *ndp; 1521 int ret, printed = 0; 1522 1523 /* 1524 * First, merge locally issued Opens into the list for the server. 1525 */ 1526 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1527 while (dp != NULL) { 1528 ndp = TAILQ_NEXT(dp, nfsdl_list); 1529 owp = LIST_FIRST(&dp->nfsdl_owner); 1530 while (owp != NULL) { 1531 nowp = LIST_NEXT(owp, nfsow_list); 1532 op = LIST_FIRST(&owp->nfsow_open); 1533 if (op != NULL) { 1534 if (LIST_NEXT(op, nfso_list) != NULL) 1535 panic("nfsclexp"); 1536 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1537 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1538 NFSV4CL_LOCKNAMELEN)) 1539 break; 1540 } 1541 if (towp != NULL) { 1542 /* Merge opens in */ 1543 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1544 if (top->nfso_fhlen == op->nfso_fhlen && 1545 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1546 op->nfso_fhlen)) { 1547 top->nfso_mode |= op->nfso_mode; 1548 top->nfso_opencnt += op->nfso_opencnt; 1549 break; 1550 } 1551 } 1552 if (top == NULL) { 1553 /* Just add the open to the owner list */ 1554 LIST_REMOVE(op, nfso_list); 1555 op->nfso_own = towp; 1556 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1557 newnfsstats.cllocalopens--; 1558 newnfsstats.clopens++; 1559 } 1560 } else { 1561 /* Just add the openowner to the client list */ 1562 LIST_REMOVE(owp, nfsow_list); 1563 owp->nfsow_clp = clp; 1564 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1565 newnfsstats.cllocalopenowners--; 1566 newnfsstats.clopenowners++; 1567 newnfsstats.cllocalopens--; 1568 newnfsstats.clopens++; 1569 } 1570 } 1571 owp = nowp; 1572 } 1573 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1574 printed = 1; 1575 printf("nfsv4 expired locks lost\n"); 1576 } 1577 nfscl_cleandeleg(dp); 1578 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1579 dp = ndp; 1580 } 1581 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1582 panic("nfsclexp"); 1583 1584 /* 1585 * Now, try and reopen against the server. 1586 */ 1587 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1588 owp->nfsow_seqid = 0; 1589 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1590 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1591 if (ret && !printed) { 1592 printed = 1; 1593 printf("nfsv4 expired locks lost\n"); 1594 } 1595 } 1596 if (LIST_EMPTY(&owp->nfsow_open)) 1597 nfscl_freeopenowner(owp, 0); 1598 } 1599 } 1600 1601 #ifndef __FreeBSD__ 1602 /* 1603 * Called from exit() upon process termination. 1604 */ 1605 APPLESTATIC void 1606 nfscl_cleanup(NFSPROC_T *p) 1607 { 1608 struct nfsclclient *clp; 1609 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1610 1611 if (!nfscl_inited) 1612 return; 1613 nfscl_filllockowner(p, own); 1614 1615 NFSLOCKCLSTATE(); 1616 /* 1617 * Loop through all the clientids, looking for the OpenOwners. 1618 */ 1619 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 1620 nfscl_cleanup_common(clp, own); 1621 NFSUNLOCKCLSTATE(); 1622 } 1623 #endif /* !__FreeBSD__ */ 1624 1625 /* 1626 * Common code used by nfscl_cleanup() and nfscl_cleanupkext(). 1627 * Must be called with CLSTATE lock held. 1628 */ 1629 static void 1630 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1631 { 1632 struct nfsclowner *owp, *nowp; 1633 struct nfsclopen *op; 1634 struct nfscllockowner *lp, *nlp; 1635 struct nfscldeleg *dp; 1636 1637 /* First, get rid of local locks on delegations. */ 1638 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1639 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1640 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1641 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1642 panic("nfscllckw"); 1643 nfscl_freelockowner(lp, 1); 1644 } 1645 } 1646 } 1647 owp = LIST_FIRST(&clp->nfsc_owner); 1648 while (owp != NULL) { 1649 nowp = LIST_NEXT(owp, nfsow_list); 1650 if (!NFSBCMP(owp->nfsow_owner, own, 1651 NFSV4CL_LOCKNAMELEN)) { 1652 /* 1653 * If there are children that haven't closed the 1654 * file descriptors yet, the opens will still be 1655 * here. For that case, let the renew thread clear 1656 * out the OpenOwner later. 1657 */ 1658 if (LIST_EMPTY(&owp->nfsow_open)) 1659 nfscl_freeopenowner(owp, 0); 1660 else 1661 owp->nfsow_defunct = 1; 1662 } else { 1663 /* look for lockowners on other opens */ 1664 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1665 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1666 if (!NFSBCMP(lp->nfsl_owner, own, 1667 NFSV4CL_LOCKNAMELEN)) 1668 lp->nfsl_defunct = 1; 1669 } 1670 } 1671 } 1672 owp = nowp; 1673 } 1674 1675 /* and check the defunct list */ 1676 LIST_FOREACH(lp, &clp->nfsc_defunctlockowner, nfsl_list) { 1677 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) 1678 lp->nfsl_defunct = 1; 1679 } 1680 } 1681 1682 #if defined(APPLEKEXT) || defined(__FreeBSD__) 1683 /* 1684 * Simulate the call nfscl_cleanup() by looking for open owners associated 1685 * with processes that no longer exist, since a call to nfscl_cleanup() 1686 * can't be patched into exit(). 1687 */ 1688 static void 1689 nfscl_cleanupkext(struct nfsclclient *clp) 1690 { 1691 struct nfsclowner *owp, *nowp; 1692 struct nfscllockowner *lp; 1693 1694 NFSPROCLISTLOCK(); 1695 NFSLOCKCLSTATE(); 1696 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1697 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1698 nfscl_cleanup_common(clp, owp->nfsow_owner); 1699 } 1700 1701 /* and check the defunct list */ 1702 LIST_FOREACH(lp, &clp->nfsc_defunctlockowner, nfsl_list) { 1703 if (nfscl_procdoesntexist(lp->nfsl_owner)) 1704 lp->nfsl_defunct = 1; 1705 } 1706 NFSUNLOCKCLSTATE(); 1707 NFSPROCLISTUNLOCK(); 1708 } 1709 #endif /* APPLEKEXT || __FreeBSD__ */ 1710 1711 /* 1712 * Called from nfs umount to free up the clientid. 1713 */ 1714 APPLESTATIC void 1715 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1716 { 1717 struct nfsclclient *clp; 1718 struct ucred *cred; 1719 int igotlock; 1720 1721 clp = nmp->nm_clp; 1722 if (clp != NULL) { 1723 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1724 panic("nfscl umount"); 1725 1726 /* 1727 * First, handshake with the nfscl renew thread, to terminate 1728 * it. 1729 */ 1730 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1731 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1732 (void) tsleep((caddr_t)clp, PWAIT, "nfsclumnt", hz); 1733 1734 NFSLOCKCLSTATE(); 1735 do { 1736 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1737 NFSCLSTATEMUTEXPTR); 1738 } while (!igotlock); 1739 NFSUNLOCKCLSTATE(); 1740 1741 /* 1742 * Free up all the state. It will expire on the server, but 1743 * maybe we should do a SetClientId/SetClientIdConfirm so 1744 * the server throws it away? 1745 */ 1746 LIST_REMOVE(clp, nfsc_list); 1747 nfscl_delegreturnall(clp, p); 1748 cred = newnfs_getcred(); 1749 (void) nfsrpc_setclient(nmp, clp, cred, p); 1750 nfscl_cleanclient(clp); 1751 nmp->nm_clp = NULL; 1752 NFSFREECRED(cred); 1753 FREE((caddr_t)clp, M_NFSCLCLIENT); 1754 } 1755 1756 } 1757 1758 /* 1759 * This function is called when a server replies with NFSERR_STALECLIENTID 1760 * or NFSERR_STALESTATEID. It traverses the clientid lists, doing Opens 1761 * and Locks with reclaim. If these fail, it deletes the corresponding state. 1762 */ 1763 static void 1764 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1765 { 1766 struct nfsclowner *owp, *nowp; 1767 struct nfsclopen *op, *nop; 1768 struct nfscllockowner *lp, *nlp; 1769 struct nfscllock *lop, *nlop; 1770 struct nfscldeleg *dp, *ndp, *tdp; 1771 struct nfsmount *nmp; 1772 struct ucred *tcred; 1773 struct nfsclopenhead extra_open; 1774 struct nfscldeleghead extra_deleg; 1775 struct nfsreq *rep; 1776 u_int64_t len; 1777 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1778 int igotlock = 0, error, trycnt, firstlock, s; 1779 1780 /* 1781 * First, lock the client structure, so everyone else will 1782 * block when trying to use state. 1783 */ 1784 NFSLOCKCLSTATE(); 1785 do { 1786 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1787 NFSCLSTATEMUTEXPTR); 1788 } while (!igotlock); 1789 NFSUNLOCKCLSTATE(); 1790 1791 nmp = clp->nfsc_nmp; 1792 if (nmp == NULL) 1793 panic("nfscl recover"); 1794 trycnt = 5; 1795 do { 1796 error = nfsrpc_setclient(nmp, clp, cred, p); 1797 } while ((error == NFSERR_STALECLIENTID || 1798 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 1799 if (error) { 1800 nfscl_cleanclient(clp); 1801 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 1802 NFSCLFLAGS_RECOVER); 1803 NFSLOCKCLSTATE(); 1804 nfsv4_unlock(&clp->nfsc_lock, 0); 1805 NFSUNLOCKCLSTATE(); 1806 return; 1807 } 1808 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 1809 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 1810 1811 /* 1812 * Mark requests already queued on the server, so that they don't 1813 * initiate another recovery cycle. Any requests already in the 1814 * queue that handle state information will have the old stale 1815 * clientid/stateid and will get a NFSERR_STALESTATEID or 1816 * NFSERR_STALECLIENTID reply from the server. This will be 1817 * translated to NFSERR_STALEDONTRECOVER when R_DONTRECOVER is set. 1818 */ 1819 s = splsoftclock(); 1820 NFSLOCKREQ(); 1821 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 1822 if (rep->r_nmp == nmp) 1823 rep->r_flags |= R_DONTRECOVER; 1824 } 1825 NFSUNLOCKREQ(); 1826 splx(s); 1827 1828 /* get rid of defunct lockowners */ 1829 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, nlp) { 1830 nfscl_freelockowner(lp, 0); 1831 } 1832 1833 /* 1834 * Now, mark all delegations "need reclaim". 1835 */ 1836 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 1837 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 1838 1839 TAILQ_INIT(&extra_deleg); 1840 LIST_INIT(&extra_open); 1841 /* 1842 * Now traverse the state lists, doing Open and Lock Reclaims. 1843 */ 1844 tcred = newnfs_getcred(); 1845 owp = LIST_FIRST(&clp->nfsc_owner); 1846 while (owp != NULL) { 1847 nowp = LIST_NEXT(owp, nfsow_list); 1848 owp->nfsow_seqid = 0; 1849 op = LIST_FIRST(&owp->nfsow_open); 1850 while (op != NULL) { 1851 nop = LIST_NEXT(op, nfso_list); 1852 if (error != NFSERR_NOGRACE) { 1853 /* Search for a delegation to reclaim with the open */ 1854 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1855 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1856 continue; 1857 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 1858 mode = NFSV4OPEN_ACCESSWRITE; 1859 delegtype = NFSV4OPEN_DELEGATEWRITE; 1860 } else { 1861 mode = NFSV4OPEN_ACCESSREAD; 1862 delegtype = NFSV4OPEN_DELEGATEREAD; 1863 } 1864 if ((op->nfso_mode & mode) == mode && 1865 op->nfso_fhlen == dp->nfsdl_fhlen && 1866 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 1867 break; 1868 } 1869 ndp = dp; 1870 if (dp == NULL) 1871 delegtype = NFSV4OPEN_DELEGATENONE; 1872 newnfs_copycred(&op->nfso_cred, tcred); 1873 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 1874 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 1875 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 1876 tcred, p); 1877 if (!error) { 1878 /* Handle any replied delegation */ 1879 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 1880 || NFSMNT_RDONLY(nmp->nm_mountp))) { 1881 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 1882 mode = NFSV4OPEN_ACCESSWRITE; 1883 else 1884 mode = NFSV4OPEN_ACCESSREAD; 1885 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1886 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1887 continue; 1888 if ((op->nfso_mode & mode) == mode && 1889 op->nfso_fhlen == dp->nfsdl_fhlen && 1890 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 1891 op->nfso_fhlen)) { 1892 dp->nfsdl_stateid = ndp->nfsdl_stateid; 1893 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 1894 dp->nfsdl_ace = ndp->nfsdl_ace; 1895 dp->nfsdl_change = ndp->nfsdl_change; 1896 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 1897 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 1898 dp->nfsdl_flags |= NFSCLDL_RECALL; 1899 FREE((caddr_t)ndp, M_NFSCLDELEG); 1900 ndp = NULL; 1901 break; 1902 } 1903 } 1904 } 1905 if (ndp != NULL) 1906 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 1907 1908 /* and reclaim all byte range locks */ 1909 lp = LIST_FIRST(&op->nfso_lock); 1910 while (lp != NULL) { 1911 nlp = LIST_NEXT(lp, nfsl_list); 1912 lp->nfsl_seqid = 0; 1913 firstlock = 1; 1914 lop = LIST_FIRST(&lp->nfsl_lock); 1915 while (lop != NULL) { 1916 nlop = LIST_NEXT(lop, nfslo_list); 1917 if (lop->nfslo_end == NFS64BITSSET) 1918 len = NFS64BITSSET; 1919 else 1920 len = lop->nfslo_end - lop->nfslo_first; 1921 if (error != NFSERR_NOGRACE) 1922 error = nfscl_trylock(nmp, NULL, 1923 op->nfso_fh, op->nfso_fhlen, lp, 1924 firstlock, 1, lop->nfslo_first, len, 1925 lop->nfslo_type, tcred, p); 1926 if (error != 0) 1927 nfscl_freelock(lop, 0); 1928 else 1929 firstlock = 0; 1930 lop = nlop; 1931 } 1932 /* If no locks, but a lockowner, just delete it. */ 1933 if (LIST_EMPTY(&lp->nfsl_lock)) 1934 nfscl_freelockowner(lp, 0); 1935 lp = nlp; 1936 } 1937 } else { 1938 nfscl_freeopen(op, 0); 1939 } 1940 } 1941 op = nop; 1942 } 1943 owp = nowp; 1944 } 1945 1946 /* 1947 * Now, try and get any delegations not yet reclaimed by cobbling 1948 * to-gether an appropriate open. 1949 */ 1950 nowp = NULL; 1951 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1952 while (dp != NULL) { 1953 ndp = TAILQ_NEXT(dp, nfsdl_list); 1954 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 1955 if (nowp == NULL) { 1956 MALLOC(nowp, struct nfsclowner *, 1957 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 1958 /* 1959 * Name must be as long an largest possible 1960 * NFSV4CL_LOCKNAMELEN. 12 for now. 1961 */ 1962 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 1963 NFSV4CL_LOCKNAMELEN); 1964 LIST_INIT(&nowp->nfsow_open); 1965 nowp->nfsow_clp = clp; 1966 nowp->nfsow_seqid = 0; 1967 nowp->nfsow_defunct = 0; 1968 nfscl_lockinit(&nowp->nfsow_rwlock); 1969 } 1970 nop = NULL; 1971 if (error != NFSERR_NOGRACE) { 1972 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 1973 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 1974 nop->nfso_own = nowp; 1975 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 1976 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 1977 delegtype = NFSV4OPEN_DELEGATEWRITE; 1978 } else { 1979 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 1980 delegtype = NFSV4OPEN_DELEGATEREAD; 1981 } 1982 nop->nfso_opencnt = 0; 1983 nop->nfso_posixlock = 1; 1984 nop->nfso_fhlen = dp->nfsdl_fhlen; 1985 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 1986 LIST_INIT(&nop->nfso_lock); 1987 nop->nfso_stateid.seqid = 0; 1988 nop->nfso_stateid.other[0] = 0; 1989 nop->nfso_stateid.other[1] = 0; 1990 nop->nfso_stateid.other[2] = 0; 1991 newnfs_copycred(&dp->nfsdl_cred, tcred); 1992 newnfs_copyincred(tcred, &nop->nfso_cred); 1993 tdp = NULL; 1994 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 1995 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 1996 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 1997 delegtype, tcred, p); 1998 if (tdp != NULL) { 1999 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2000 mode = NFSV4OPEN_ACCESSWRITE; 2001 else 2002 mode = NFSV4OPEN_ACCESSREAD; 2003 if ((nop->nfso_mode & mode) == mode && 2004 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2005 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2006 nop->nfso_fhlen)) { 2007 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2008 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2009 dp->nfsdl_ace = tdp->nfsdl_ace; 2010 dp->nfsdl_change = tdp->nfsdl_change; 2011 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2012 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2013 dp->nfsdl_flags |= NFSCLDL_RECALL; 2014 FREE((caddr_t)tdp, M_NFSCLDELEG); 2015 } else { 2016 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2017 } 2018 } 2019 } 2020 if (error) { 2021 if (nop != NULL) 2022 FREE((caddr_t)nop, M_NFSCLOPEN); 2023 /* 2024 * Couldn't reclaim it, so throw the state 2025 * away. Ouch!! 2026 */ 2027 nfscl_cleandeleg(dp); 2028 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2029 } else { 2030 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2031 } 2032 } 2033 dp = ndp; 2034 } 2035 2036 /* 2037 * Now, get rid of extra Opens and Delegations. 2038 */ 2039 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2040 do { 2041 newnfs_copycred(&op->nfso_cred, tcred); 2042 error = nfscl_tryclose(op, tcred, nmp, p); 2043 if (error == NFSERR_GRACE) 2044 (void) nfs_catnap(PZERO, "nfsexcls"); 2045 } while (error == NFSERR_GRACE); 2046 LIST_REMOVE(op, nfso_list); 2047 FREE((caddr_t)op, M_NFSCLOPEN); 2048 } 2049 if (nowp != NULL) 2050 FREE((caddr_t)nowp, M_NFSCLOWNER); 2051 2052 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2053 do { 2054 newnfs_copycred(&dp->nfsdl_cred, tcred); 2055 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2056 if (error == NFSERR_GRACE) 2057 (void) nfs_catnap(PZERO, "nfsexdlg"); 2058 } while (error == NFSERR_GRACE); 2059 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2060 FREE((caddr_t)dp, M_NFSCLDELEG); 2061 } 2062 2063 NFSLOCKCLSTATE(); 2064 nfsv4_unlock(&clp->nfsc_lock, 0); 2065 NFSUNLOCKCLSTATE(); 2066 NFSFREECRED(tcred); 2067 } 2068 2069 /* 2070 * This function is called when a server replies with NFSERR_EXPIRED. 2071 * It deletes all state for the client and does a fresh SetClientId/confirm. 2072 * XXX Someday it should post a signal to the process(es) that hold the 2073 * state, so they know that lock state has been lost. 2074 */ 2075 APPLESTATIC int 2076 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2077 { 2078 struct nfscllockowner *lp, *nlp; 2079 struct nfsmount *nmp; 2080 struct ucred *cred; 2081 int igotlock = 0, error, trycnt; 2082 2083 /* 2084 * If the clientid has gone away or a new SetClientid has already 2085 * been done, just return ok. 2086 */ 2087 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2088 return (0); 2089 2090 /* 2091 * First, lock the client structure, so everyone else will 2092 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2093 * that only one thread does the work. 2094 */ 2095 NFSLOCKCLSTATE(); 2096 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2097 do { 2098 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2099 NFSCLSTATEMUTEXPTR); 2100 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2101 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2102 if (igotlock) 2103 nfsv4_unlock(&clp->nfsc_lock, 0); 2104 NFSUNLOCKCLSTATE(); 2105 return (0); 2106 } 2107 NFSUNLOCKCLSTATE(); 2108 2109 nmp = clp->nfsc_nmp; 2110 if (nmp == NULL) 2111 panic("nfscl expired"); 2112 cred = newnfs_getcred(); 2113 trycnt = 5; 2114 do { 2115 error = nfsrpc_setclient(nmp, clp, cred, p); 2116 } while ((error == NFSERR_STALECLIENTID || 2117 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2118 if (error) { 2119 /* 2120 * Clear out any state. 2121 */ 2122 nfscl_cleanclient(clp); 2123 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 2124 NFSCLFLAGS_RECOVER); 2125 } else { 2126 /* get rid of defunct lockowners */ 2127 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, 2128 nlp) { 2129 nfscl_freelockowner(lp, 0); 2130 } 2131 2132 /* 2133 * Expire the state for the client. 2134 */ 2135 nfscl_expireclient(clp, nmp, cred, p); 2136 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2137 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2138 } 2139 NFSFREECRED(cred); 2140 clp->nfsc_flags &= ~NFSCLFLAGS_EXPIREIT; 2141 NFSLOCKCLSTATE(); 2142 nfsv4_unlock(&clp->nfsc_lock, 0); 2143 NFSUNLOCKCLSTATE(); 2144 return (error); 2145 } 2146 2147 /* 2148 * This function inserts a lock in the list after insert_lop. 2149 */ 2150 static void 2151 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2152 struct nfscllock *insert_lop, int local) 2153 { 2154 2155 if ((struct nfscllockowner *)insert_lop == lp) 2156 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2157 else 2158 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2159 if (local) 2160 newnfsstats.cllocallocks++; 2161 else 2162 newnfsstats.cllocks++; 2163 } 2164 2165 /* 2166 * This function updates the locking for a lock owner and given file. It 2167 * maintains a list of lock ranges ordered on increasing file offset that 2168 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2169 * It always adds new_lop to the list and sometimes uses the one pointed 2170 * at by other_lopp. 2171 * Returns 1 if the locks were modified, 0 otherwise. 2172 */ 2173 static int 2174 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2175 struct nfscllock **other_lopp, int local) 2176 { 2177 struct nfscllock *new_lop = *new_lopp; 2178 struct nfscllock *lop, *tlop, *ilop; 2179 struct nfscllock *other_lop; 2180 int unlock = 0, modified = 0; 2181 u_int64_t tmp; 2182 2183 /* 2184 * Work down the list until the lock is merged. 2185 */ 2186 if (new_lop->nfslo_type == F_UNLCK) 2187 unlock = 1; 2188 ilop = (struct nfscllock *)lp; 2189 lop = LIST_FIRST(&lp->nfsl_lock); 2190 while (lop != NULL) { 2191 /* 2192 * Only check locks for this file that aren't before the start of 2193 * new lock's range. 2194 */ 2195 if (lop->nfslo_end >= new_lop->nfslo_first) { 2196 if (new_lop->nfslo_end < lop->nfslo_first) { 2197 /* 2198 * If the new lock ends before the start of the 2199 * current lock's range, no merge, just insert 2200 * the new lock. 2201 */ 2202 break; 2203 } 2204 if (new_lop->nfslo_type == lop->nfslo_type || 2205 (new_lop->nfslo_first <= lop->nfslo_first && 2206 new_lop->nfslo_end >= lop->nfslo_end)) { 2207 /* 2208 * This lock can be absorbed by the new lock/unlock. 2209 * This happens when it covers the entire range 2210 * of the old lock or is contiguous 2211 * with the old lock and is of the same type or an 2212 * unlock. 2213 */ 2214 if (new_lop->nfslo_type != lop->nfslo_type || 2215 new_lop->nfslo_first != lop->nfslo_first || 2216 new_lop->nfslo_end != lop->nfslo_end) 2217 modified = 1; 2218 if (lop->nfslo_first < new_lop->nfslo_first) 2219 new_lop->nfslo_first = lop->nfslo_first; 2220 if (lop->nfslo_end > new_lop->nfslo_end) 2221 new_lop->nfslo_end = lop->nfslo_end; 2222 tlop = lop; 2223 lop = LIST_NEXT(lop, nfslo_list); 2224 nfscl_freelock(tlop, local); 2225 continue; 2226 } 2227 2228 /* 2229 * All these cases are for contiguous locks that are not the 2230 * same type, so they can't be merged. 2231 */ 2232 if (new_lop->nfslo_first <= lop->nfslo_first) { 2233 /* 2234 * This case is where the new lock overlaps with the 2235 * first part of the old lock. Move the start of the 2236 * old lock to just past the end of the new lock. The 2237 * new lock will be inserted in front of the old, since 2238 * ilop hasn't been updated. (We are done now.) 2239 */ 2240 if (lop->nfslo_first != new_lop->nfslo_end) { 2241 lop->nfslo_first = new_lop->nfslo_end; 2242 modified = 1; 2243 } 2244 break; 2245 } 2246 if (new_lop->nfslo_end >= lop->nfslo_end) { 2247 /* 2248 * This case is where the new lock overlaps with the 2249 * end of the old lock's range. Move the old lock's 2250 * end to just before the new lock's first and insert 2251 * the new lock after the old lock. 2252 * Might not be done yet, since the new lock could 2253 * overlap further locks with higher ranges. 2254 */ 2255 if (lop->nfslo_end != new_lop->nfslo_first) { 2256 lop->nfslo_end = new_lop->nfslo_first; 2257 modified = 1; 2258 } 2259 ilop = lop; 2260 lop = LIST_NEXT(lop, nfslo_list); 2261 continue; 2262 } 2263 /* 2264 * The final case is where the new lock's range is in the 2265 * middle of the current lock's and splits the current lock 2266 * up. Use *other_lopp to handle the second part of the 2267 * split old lock range. (We are done now.) 2268 * For unlock, we use new_lop as other_lop and tmp, since 2269 * other_lop and new_lop are the same for this case. 2270 * We noted the unlock case above, so we don't need 2271 * new_lop->nfslo_type any longer. 2272 */ 2273 tmp = new_lop->nfslo_first; 2274 if (unlock) { 2275 other_lop = new_lop; 2276 *new_lopp = NULL; 2277 } else { 2278 other_lop = *other_lopp; 2279 *other_lopp = NULL; 2280 } 2281 other_lop->nfslo_first = new_lop->nfslo_end; 2282 other_lop->nfslo_end = lop->nfslo_end; 2283 other_lop->nfslo_type = lop->nfslo_type; 2284 lop->nfslo_end = tmp; 2285 nfscl_insertlock(lp, other_lop, lop, local); 2286 ilop = lop; 2287 modified = 1; 2288 break; 2289 } 2290 ilop = lop; 2291 lop = LIST_NEXT(lop, nfslo_list); 2292 if (lop == NULL) 2293 break; 2294 } 2295 2296 /* 2297 * Insert the new lock in the list at the appropriate place. 2298 */ 2299 if (!unlock) { 2300 nfscl_insertlock(lp, new_lop, ilop, local); 2301 *new_lopp = NULL; 2302 modified = 1; 2303 } 2304 return (modified); 2305 } 2306 2307 /* 2308 * This function must be run as a kernel thread. 2309 * It does Renew Ops and recovery, when required. 2310 */ 2311 APPLESTATIC void 2312 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2313 { 2314 struct nfsclowner *owp, *nowp; 2315 struct nfsclopen *op; 2316 struct nfscllockowner *lp, *nlp, *olp; 2317 struct nfscldeleghead dh; 2318 struct nfscllockownerhead lh; 2319 struct nfscldeleg *dp, *ndp; 2320 struct ucred *cred; 2321 u_int32_t clidrev; 2322 int error, cbpathdown, islept, igotlock, ret, clearok; 2323 2324 cred = newnfs_getcred(); 2325 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2326 for(;;) { 2327 newnfs_setroot(cred); 2328 cbpathdown = 0; 2329 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) 2330 nfscl_recover(clp, cred, p); 2331 if (clp->nfsc_expire <= NFSD_MONOSEC && 2332 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2333 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2334 clidrev = clp->nfsc_clientidrev; 2335 error = nfsrpc_renew(clp, cred, p); 2336 if (error == NFSERR_CBPATHDOWN) 2337 cbpathdown = 1; 2338 else if (error == NFSERR_STALECLIENTID) 2339 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2340 else if (error == NFSERR_EXPIRED) 2341 (void) nfscl_hasexpired(clp, clidrev, p); 2342 } 2343 2344 LIST_INIT(&lh); 2345 TAILQ_INIT(&dh); 2346 NFSLOCKCLSTATE(); 2347 if (cbpathdown) 2348 /* It's a Total Recall! */ 2349 nfscl_totalrecall(clp); 2350 2351 /* 2352 * Now, handle defunct owners. 2353 */ 2354 owp = LIST_FIRST(&clp->nfsc_owner); 2355 while (owp != NULL) { 2356 nowp = LIST_NEXT(owp, nfsow_list); 2357 if (LIST_EMPTY(&owp->nfsow_open)) { 2358 if (owp->nfsow_defunct) 2359 nfscl_freeopenowner(owp, 0); 2360 } else { 2361 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2362 lp = LIST_FIRST(&op->nfso_lock); 2363 while (lp != NULL) { 2364 nlp = LIST_NEXT(lp, nfsl_list); 2365 if (lp->nfsl_defunct && 2366 LIST_EMPTY(&lp->nfsl_lock)) { 2367 LIST_FOREACH(olp, &lh, nfsl_list) { 2368 if (!NFSBCMP(olp->nfsl_owner, 2369 lp->nfsl_owner,NFSV4CL_LOCKNAMELEN)) 2370 break; 2371 } 2372 if (olp == NULL) { 2373 LIST_REMOVE(lp, nfsl_list); 2374 LIST_INSERT_HEAD(&lh, lp, nfsl_list); 2375 } else { 2376 nfscl_freelockowner(lp, 0); 2377 } 2378 } 2379 lp = nlp; 2380 } 2381 } 2382 } 2383 owp = nowp; 2384 } 2385 2386 /* also search the defunct list */ 2387 lp = LIST_FIRST(&clp->nfsc_defunctlockowner); 2388 while (lp != NULL) { 2389 nlp = LIST_NEXT(lp, nfsl_list); 2390 if (lp->nfsl_defunct) { 2391 LIST_FOREACH(olp, &lh, nfsl_list) { 2392 if (!NFSBCMP(olp->nfsl_owner, lp->nfsl_owner, 2393 NFSV4CL_LOCKNAMELEN)) 2394 break; 2395 } 2396 if (olp == NULL) { 2397 LIST_REMOVE(lp, nfsl_list); 2398 LIST_INSERT_HEAD(&lh, lp, nfsl_list); 2399 } else { 2400 nfscl_freelockowner(lp, 0); 2401 } 2402 } 2403 lp = nlp; 2404 } 2405 /* and release defunct lock owners */ 2406 LIST_FOREACH_SAFE(lp, &lh, nfsl_list, nlp) { 2407 nfscl_freelockowner(lp, 0); 2408 } 2409 2410 /* 2411 * Do the recall on any delegations. To avoid trouble, always 2412 * come back up here after having slept. 2413 */ 2414 igotlock = 0; 2415 tryagain: 2416 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2417 while (dp != NULL) { 2418 ndp = TAILQ_NEXT(dp, nfsdl_list); 2419 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2420 /* 2421 * Wait for outstanding I/O ops to be done. 2422 */ 2423 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2424 if (igotlock) { 2425 nfsv4_unlock(&clp->nfsc_lock, 0); 2426 igotlock = 0; 2427 } 2428 dp->nfsdl_rwlock.nfslock_lock |= 2429 NFSV4LOCK_WANTED; 2430 (void) nfsmsleep(&dp->nfsdl_rwlock, 2431 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2432 NULL); 2433 goto tryagain; 2434 } 2435 while (!igotlock) { 2436 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2437 &islept, NFSCLSTATEMUTEXPTR); 2438 if (islept) 2439 goto tryagain; 2440 } 2441 NFSUNLOCKCLSTATE(); 2442 newnfs_copycred(&dp->nfsdl_cred, cred); 2443 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2444 NULL, cred, p); 2445 if (!ret) { 2446 nfscl_cleandeleg(dp); 2447 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2448 nfsdl_list); 2449 LIST_REMOVE(dp, nfsdl_hash); 2450 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2451 nfscl_delegcnt--; 2452 newnfsstats.cldelegates--; 2453 } 2454 NFSLOCKCLSTATE(); 2455 } 2456 dp = ndp; 2457 } 2458 2459 /* 2460 * Clear out old delegations, if we are above the high water 2461 * mark. Only clear out ones with no state related to them. 2462 * The tailq list is in LRU order. 2463 */ 2464 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2465 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2466 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2467 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2468 dp->nfsdl_rwlock.nfslock_lock == 0 && 2469 dp->nfsdl_timestamp < NFSD_MONOSEC && 2470 !(dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2471 NFSCLDL_NEEDRECLAIM))) { 2472 clearok = 1; 2473 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2474 op = LIST_FIRST(&owp->nfsow_open); 2475 if (op != NULL && op->nfso_opencnt > 0) { 2476 clearok = 0; 2477 break; 2478 } 2479 } 2480 if (clearok) { 2481 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2482 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2483 clearok = 0; 2484 break; 2485 } 2486 } 2487 } 2488 if (clearok) { 2489 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2490 LIST_REMOVE(dp, nfsdl_hash); 2491 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2492 nfscl_delegcnt--; 2493 newnfsstats.cldelegates--; 2494 } 2495 } 2496 dp = ndp; 2497 } 2498 if (igotlock) 2499 nfsv4_unlock(&clp->nfsc_lock, 0); 2500 NFSUNLOCKCLSTATE(); 2501 2502 /* 2503 * Delegreturn any delegations cleaned out or recalled. 2504 */ 2505 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2506 newnfs_copycred(&dp->nfsdl_cred, cred); 2507 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2508 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2509 FREE((caddr_t)dp, M_NFSCLDELEG); 2510 } 2511 2512 #if defined(APPLEKEXT) || defined(__FreeBSD__) 2513 /* 2514 * Simulate the calls to nfscl_cleanup() when a process 2515 * exits, since the call can't be patched into exit(). 2516 */ 2517 { 2518 struct timespec mytime; 2519 static time_t prevsec = 0; 2520 2521 NFSGETNANOTIME(&mytime); 2522 if (prevsec != mytime.tv_sec) { 2523 prevsec = mytime.tv_sec; 2524 nfscl_cleanupkext(clp); 2525 } 2526 } 2527 #endif /* APPLEKEXT || __FreeBSD__ */ 2528 2529 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2530 (void) tsleep((caddr_t)clp, PWAIT, "nfscl", hz); 2531 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2532 NFSFREECRED(cred); 2533 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2534 wakeup((caddr_t)clp); 2535 return; 2536 } 2537 } 2538 } 2539 2540 /* 2541 * Initiate state recovery. Called when NFSERR_STALECLIENTID or 2542 * NFSERR_STALESTATEID is received. 2543 */ 2544 APPLESTATIC void 2545 nfscl_initiate_recovery(struct nfsclclient *clp) 2546 { 2547 2548 if (clp == NULL) 2549 return; 2550 NFSLOCKCLSTATE(); 2551 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2552 NFSUNLOCKCLSTATE(); 2553 wakeup((caddr_t)clp); 2554 } 2555 2556 /* 2557 * Dump out the state stuff for debugging. 2558 */ 2559 APPLESTATIC void 2560 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2561 int lockowner, int locks) 2562 { 2563 struct nfsclclient *clp; 2564 struct nfsclowner *owp; 2565 struct nfsclopen *op; 2566 struct nfscllockowner *lp; 2567 struct nfscllock *lop; 2568 struct nfscldeleg *dp; 2569 2570 clp = nmp->nm_clp; 2571 if (clp == NULL) { 2572 printf("nfscl dumpstate NULL clp\n"); 2573 return; 2574 } 2575 NFSLOCKCLSTATE(); 2576 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2577 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2578 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2579 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2580 owp->nfsow_owner[0], owp->nfsow_owner[1], 2581 owp->nfsow_owner[2], owp->nfsow_owner[3], 2582 owp->nfsow_seqid); 2583 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2584 if (opens) 2585 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2586 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2587 op->nfso_stateid.other[2], op->nfso_opencnt, 2588 op->nfso_fh[12]); 2589 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2590 if (lockowner) 2591 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2592 lp->nfsl_owner[0], lp->nfsl_owner[1], 2593 lp->nfsl_owner[2], lp->nfsl_owner[3], 2594 lp->nfsl_seqid, 2595 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2596 lp->nfsl_stateid.other[2]); 2597 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2598 if (locks) 2599 #ifdef __FreeBSD__ 2600 printf("lck typ=%d fst=%ju end=%ju\n", 2601 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2602 (intmax_t)lop->nfslo_end); 2603 #else 2604 printf("lck typ=%d fst=%qd end=%qd\n", 2605 lop->nfslo_type, lop->nfslo_first, 2606 lop->nfslo_end); 2607 #endif 2608 } 2609 } 2610 } 2611 } 2612 } 2613 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2614 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2615 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2616 owp->nfsow_owner[0], owp->nfsow_owner[1], 2617 owp->nfsow_owner[2], owp->nfsow_owner[3], 2618 owp->nfsow_seqid); 2619 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2620 if (opens) 2621 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2622 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2623 op->nfso_stateid.other[2], op->nfso_opencnt, 2624 op->nfso_fh[12]); 2625 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2626 if (lockowner) 2627 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2628 lp->nfsl_owner[0], lp->nfsl_owner[1], 2629 lp->nfsl_owner[2], lp->nfsl_owner[3], 2630 lp->nfsl_seqid, 2631 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2632 lp->nfsl_stateid.other[2]); 2633 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2634 if (locks) 2635 #ifdef __FreeBSD__ 2636 printf("lck typ=%d fst=%ju end=%ju\n", 2637 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2638 (intmax_t)lop->nfslo_end); 2639 #else 2640 printf("lck typ=%d fst=%qd end=%qd\n", 2641 lop->nfslo_type, lop->nfslo_first, 2642 lop->nfslo_end); 2643 #endif 2644 } 2645 } 2646 } 2647 } 2648 NFSUNLOCKCLSTATE(); 2649 } 2650 2651 /* 2652 * Check for duplicate open owners and opens. 2653 * (Only used as a diagnostic aid.) 2654 */ 2655 APPLESTATIC void 2656 nfscl_dupopen(vnode_t vp, int dupopens) 2657 { 2658 struct nfsclclient *clp; 2659 struct nfsclowner *owp, *owp2; 2660 struct nfsclopen *op, *op2; 2661 struct nfsfh *nfhp; 2662 2663 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2664 if (clp == NULL) { 2665 printf("nfscl dupopen NULL clp\n"); 2666 return; 2667 } 2668 nfhp = VTONFS(vp)->n_fhp; 2669 NFSLOCKCLSTATE(); 2670 2671 /* 2672 * First, search for duplicate owners. 2673 * These should never happen! 2674 */ 2675 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2676 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2677 if (owp != owp2 && 2678 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2679 NFSV4CL_LOCKNAMELEN)) { 2680 NFSUNLOCKCLSTATE(); 2681 printf("DUP OWNER\n"); 2682 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2683 return; 2684 } 2685 } 2686 } 2687 2688 /* 2689 * Now, search for duplicate stateids. 2690 * These shouldn't happen, either. 2691 */ 2692 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2693 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2694 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2695 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2696 if (op != op2 && 2697 (op->nfso_stateid.other[0] != 0 || 2698 op->nfso_stateid.other[1] != 0 || 2699 op->nfso_stateid.other[2] != 0) && 2700 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 2701 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 2702 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 2703 NFSUNLOCKCLSTATE(); 2704 printf("DUP STATEID\n"); 2705 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 2706 0); 2707 return; 2708 } 2709 } 2710 } 2711 } 2712 } 2713 2714 /* 2715 * Now search for duplicate opens. 2716 * Duplicate opens for the same owner 2717 * should never occur. Other duplicates are 2718 * possible and are checked for if "dupopens" 2719 * is true. 2720 */ 2721 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2722 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2723 if (nfhp->nfh_len == op2->nfso_fhlen && 2724 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 2725 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2726 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2727 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 2728 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 2729 (!NFSBCMP(op->nfso_own->nfsow_owner, 2730 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 2731 dupopens)) { 2732 if (!NFSBCMP(op->nfso_own->nfsow_owner, 2733 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 2734 NFSUNLOCKCLSTATE(); 2735 printf("BADDUP OPEN\n"); 2736 } else { 2737 NFSUNLOCKCLSTATE(); 2738 printf("DUP OPEN\n"); 2739 } 2740 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 2741 0, 0); 2742 return; 2743 } 2744 } 2745 } 2746 } 2747 } 2748 } 2749 NFSUNLOCKCLSTATE(); 2750 } 2751 2752 /* 2753 * During close, find an open that needs to be dereferenced and 2754 * dereference it. If there are no more opens for this file, 2755 * return the list of opens, so they can be closed on the 2756 * server. As such, opens aren't closed on the server until 2757 * all the opens for the file are closed off. 2758 * This is the safe way, since it is difficult to identify 2759 * which open the close is for. 2760 * If it returns 0 for success, there will be a referenced 2761 * clp returned via clpp and a list of opens to close/free 2762 * on ohp. 2763 */ 2764 APPLESTATIC int 2765 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp, 2766 struct nfsclopenhead *ohp) 2767 { 2768 struct nfsclclient *clp; 2769 struct nfsclowner *owp, *nowp; 2770 struct nfsclopen *op, *nop; 2771 struct nfscldeleg *dp; 2772 struct nfsfh *nfhp; 2773 int error, notdecr, candelete; 2774 2775 error = nfscl_getcl(vp, NULL, NULL, &clp); 2776 if (error) 2777 return (error); 2778 *clpp = clp; 2779 2780 if (ohp != NULL) 2781 LIST_INIT(ohp); 2782 nfhp = VTONFS(vp)->n_fhp; 2783 notdecr = 1; 2784 NFSLOCKCLSTATE(); 2785 /* 2786 * First, look for one under a delegation that was locally issued 2787 * and just decrement the opencnt for it. Since all my Opens against 2788 * the server are DENY_NONE, I don't see a problem with hanging 2789 * onto them. (It is much easier to use one of the extant Opens 2790 * that I already have on the server when a Delegation is recalled 2791 * than to do fresh Opens.) Someday, I might need to rethink this, but.. 2792 */ 2793 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 2794 if (dp != NULL) { 2795 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2796 op = LIST_FIRST(&owp->nfsow_open); 2797 if (op != NULL) { 2798 /* 2799 * Since a delegation is for a file, there 2800 * should never be more than one open for 2801 * each openowner. 2802 */ 2803 if (LIST_NEXT(op, nfso_list) != NULL) 2804 panic("nfscdeleg opens"); 2805 if (notdecr && op->nfso_opencnt > 0) { 2806 notdecr = 0; 2807 op->nfso_opencnt--; 2808 break; 2809 } 2810 } 2811 } 2812 } 2813 2814 /* Now process the opens against the server. */ 2815 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2816 op = LIST_FIRST(&owp->nfsow_open); 2817 while (op != NULL) { 2818 nop = LIST_NEXT(op, nfso_list); 2819 if (op->nfso_fhlen == nfhp->nfh_len && 2820 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 2821 nfhp->nfh_len)) { 2822 /* Found an open, decrement cnt if possible */ 2823 if (notdecr && op->nfso_opencnt > 0) { 2824 notdecr = 0; 2825 op->nfso_opencnt--; 2826 } 2827 /* 2828 * There are more opens, so just return after 2829 * putting any opens already found back in the 2830 * state list. 2831 */ 2832 if (op->nfso_opencnt > 0) { 2833 if (ohp != NULL) { 2834 /* Reattach open until later */ 2835 op = LIST_FIRST(ohp); 2836 while (op != NULL) { 2837 nop = LIST_NEXT(op, nfso_list); 2838 LIST_REMOVE(op, nfso_list); 2839 LIST_INSERT_HEAD( 2840 &op->nfso_own->nfsow_open, 2841 op, nfso_list); 2842 op = nop; 2843 } 2844 LIST_INIT(ohp); 2845 } 2846 NFSUNLOCKCLSTATE(); 2847 return (0); 2848 } 2849 2850 /* 2851 * Move this entry to the list of opens to be 2852 * returned. (If we find other open(s) still in 2853 * use, it will be put back in the state list 2854 * in the code just above.) 2855 */ 2856 if (ohp != NULL) { 2857 LIST_REMOVE(op, nfso_list); 2858 LIST_INSERT_HEAD(ohp, op, nfso_list); 2859 } 2860 } 2861 op = nop; 2862 } 2863 } 2864 2865 if (dp != NULL && ohp != NULL) { 2866 /* 2867 * If we are flushing all writes against the server for this 2868 * file upon close, we do not need to keep the local opens 2869 * (against the delegation) if they all have an opencnt == 0, 2870 * since there are now no opens on the file and no dirty blocks. 2871 * If the writes aren't being flushed upon close, 2872 * a test for "no dirty blocks to write back" would have to 2873 * be added to this code. 2874 */ 2875 candelete = 1; 2876 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2877 op = LIST_FIRST(&owp->nfsow_open); 2878 if (op != NULL && op->nfso_opencnt > 0) { 2879 candelete = 0; 2880 break; 2881 } 2882 } 2883 if (candelete) { 2884 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, 2885 nowp) { 2886 op = LIST_FIRST(&owp->nfsow_open); 2887 if (op != NULL) 2888 nfscl_freeopen(op, 1); 2889 nfscl_freeopenowner(owp, 1); 2890 } 2891 } 2892 } 2893 NFSUNLOCKCLSTATE(); 2894 if (notdecr && ohp == NULL) 2895 printf("nfscl: never fnd open\n"); 2896 return (0); 2897 } 2898 2899 /* 2900 * Return all delegations on this client. 2901 * (Must be called with client sleep lock.) 2902 */ 2903 static void 2904 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 2905 { 2906 struct nfscldeleg *dp, *ndp; 2907 struct ucred *cred; 2908 2909 cred = newnfs_getcred(); 2910 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 2911 nfscl_cleandeleg(dp); 2912 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2913 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2914 } 2915 NFSFREECRED(cred); 2916 } 2917 2918 /* 2919 * Do a callback RPC. 2920 */ 2921 APPLESTATIC void 2922 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 2923 { 2924 int i, op; 2925 u_int32_t *tl; 2926 struct nfsclclient *clp; 2927 struct nfscldeleg *dp = NULL; 2928 int numops, taglen = -1, error = 0, trunc, ret = 0; 2929 u_int32_t minorvers, retops = 0, *retopsp = NULL, *repp, cbident; 2930 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 2931 vnode_t vp = NULL; 2932 struct nfsnode *np; 2933 struct vattr va; 2934 struct nfsfh *nfhp; 2935 mount_t mp; 2936 nfsattrbit_t attrbits, rattrbits; 2937 nfsv4stateid_t stateid; 2938 2939 nfsrvd_rephead(nd); 2940 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2941 taglen = fxdr_unsigned(int, *tl); 2942 if (taglen < 0) { 2943 error = EBADRPC; 2944 goto nfsmout; 2945 } 2946 if (taglen <= NFSV4_SMALLSTR) 2947 tagstr = tag; 2948 else 2949 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 2950 error = nfsrv_mtostr(nd, tagstr, taglen); 2951 if (error) { 2952 if (taglen > NFSV4_SMALLSTR) 2953 free(tagstr, M_TEMP); 2954 taglen = -1; 2955 goto nfsmout; 2956 } 2957 (void) nfsm_strtom(nd, tag, taglen); 2958 if (taglen > NFSV4_SMALLSTR) { 2959 free(tagstr, M_TEMP); 2960 } 2961 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 2962 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2963 minorvers = fxdr_unsigned(u_int32_t, *tl++); 2964 if (minorvers != NFSV4_MINORVERSION) 2965 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 2966 cbident = fxdr_unsigned(u_int32_t, *tl++); 2967 if (nd->nd_repstat) 2968 numops = 0; 2969 else 2970 numops = fxdr_unsigned(int, *tl); 2971 /* 2972 * Loop around doing the sub ops. 2973 */ 2974 for (i = 0; i < numops; i++) { 2975 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2976 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 2977 *repp++ = *tl; 2978 op = fxdr_unsigned(int, *tl); 2979 if (op < NFSV4OP_CBGETATTR || op > NFSV4OP_CBRECALL) { 2980 nd->nd_repstat = NFSERR_OPILLEGAL; 2981 *repp = nfscl_errmap(nd); 2982 retops++; 2983 break; 2984 } 2985 nd->nd_procnum = op; 2986 newnfsstats.cbrpccnt[nd->nd_procnum]++; 2987 switch (op) { 2988 case NFSV4OP_CBGETATTR: 2989 clp = NULL; 2990 error = nfsm_getfh(nd, &nfhp); 2991 if (!error) 2992 error = nfsrv_getattrbits(nd, &attrbits, 2993 NULL, NULL); 2994 if (!error) { 2995 mp = nfscl_getmnt(cbident); 2996 if (mp == NULL) 2997 error = NFSERR_SERVERFAULT; 2998 } 2999 if (!error) { 3000 dp = NULL; 3001 NFSLOCKCLSTATE(); 3002 clp = nfscl_findcl(VFSTONFS(mp)); 3003 if (clp != NULL) 3004 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3005 nfhp->nfh_len); 3006 NFSUNLOCKCLSTATE(); 3007 if (dp == NULL) 3008 error = NFSERR_SERVERFAULT; 3009 } 3010 if (!error) { 3011 ret = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3012 nfhp->nfh_len, p, &np); 3013 if (!ret) 3014 vp = NFSTOV(np); 3015 } 3016 if (nfhp != NULL) 3017 FREE((caddr_t)nfhp, M_NFSFH); 3018 if (!error) { 3019 NFSZERO_ATTRBIT(&rattrbits); 3020 if (NFSISSET_ATTRBIT(&attrbits, 3021 NFSATTRBIT_SIZE)) { 3022 if (!ret) 3023 va.va_size = np->n_size; 3024 else 3025 va.va_size = dp->nfsdl_size; 3026 NFSSETBIT_ATTRBIT(&rattrbits, 3027 NFSATTRBIT_SIZE); 3028 } 3029 if (NFSISSET_ATTRBIT(&attrbits, 3030 NFSATTRBIT_CHANGE)) { 3031 va.va_filerev = dp->nfsdl_change; 3032 if (ret || (np->n_flag & NDELEGMOD)) 3033 va.va_filerev++; 3034 NFSSETBIT_ATTRBIT(&rattrbits, 3035 NFSATTRBIT_CHANGE); 3036 } 3037 (void) nfsv4_fillattr(nd, NULL, NULL, &va, 3038 NULL, 0, &rattrbits, NULL, NULL, 0, 0); 3039 if (!ret) 3040 vrele(vp); 3041 } 3042 break; 3043 case NFSV4OP_CBRECALL: 3044 clp = NULL; 3045 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3046 NFSX_UNSIGNED); 3047 stateid.seqid = *tl++; 3048 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3049 NFSX_STATEIDOTHER); 3050 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3051 trunc = fxdr_unsigned(int, *tl); 3052 error = nfsm_getfh(nd, &nfhp); 3053 if (!error) { 3054 mp = nfscl_getmnt(cbident); 3055 if (mp == NULL) 3056 error = NFSERR_SERVERFAULT; 3057 } 3058 if (!error) { 3059 NFSLOCKCLSTATE(); 3060 clp = nfscl_findcl(VFSTONFS(mp)); 3061 if (clp != NULL) { 3062 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3063 nfhp->nfh_len); 3064 if (dp != NULL) { 3065 dp->nfsdl_flags |= 3066 NFSCLDL_RECALL; 3067 wakeup((caddr_t)clp); 3068 } 3069 } else { 3070 error = NFSERR_SERVERFAULT; 3071 } 3072 NFSUNLOCKCLSTATE(); 3073 } 3074 if (nfhp != NULL) 3075 FREE((caddr_t)nfhp, M_NFSFH); 3076 break; 3077 }; 3078 if (error) { 3079 if (error == EBADRPC || error == NFSERR_BADXDR) { 3080 nd->nd_repstat = NFSERR_BADXDR; 3081 } else { 3082 nd->nd_repstat = error; 3083 } 3084 error = 0; 3085 } 3086 retops++; 3087 if (nd->nd_repstat) { 3088 *repp = nfscl_errmap(nd); 3089 break; 3090 } else 3091 *repp = 0; /* NFS4_OK */ 3092 } 3093 nfsmout: 3094 if (error) { 3095 if (error == EBADRPC || error == NFSERR_BADXDR) 3096 nd->nd_repstat = NFSERR_BADXDR; 3097 else 3098 printf("nfsv4 comperr1=%d\n", error); 3099 } 3100 if (taglen == -1) { 3101 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3102 *tl++ = 0; 3103 *tl = 0; 3104 } else { 3105 *retopsp = txdr_unsigned(retops); 3106 } 3107 *nd->nd_errp = nfscl_errmap(nd); 3108 } 3109 3110 /* 3111 * Generate the next cbident value. Basically just increment a static value 3112 * and then check that it isn't already in the list, if it has wrapped around. 3113 */ 3114 static u_int32_t 3115 nfscl_nextcbident(void) 3116 { 3117 struct nfsclclient *clp; 3118 int matched; 3119 static u_int32_t nextcbident = 0; 3120 static int haswrapped = 0; 3121 3122 nextcbident++; 3123 if (nextcbident == 0) 3124 haswrapped = 1; 3125 if (haswrapped) { 3126 /* 3127 * Search the clientid list for one already using this cbident. 3128 */ 3129 do { 3130 matched = 0; 3131 NFSLOCKCLSTATE(); 3132 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3133 if (clp->nfsc_cbident == nextcbident) { 3134 matched = 1; 3135 break; 3136 } 3137 } 3138 NFSUNLOCKCLSTATE(); 3139 if (matched == 1) 3140 nextcbident++; 3141 } while (matched); 3142 } 3143 return (nextcbident); 3144 } 3145 3146 /* 3147 * Get the mount point related to a given cbident. 3148 */ 3149 static mount_t 3150 nfscl_getmnt(u_int32_t cbident) 3151 { 3152 struct nfsclclient *clp; 3153 struct nfsmount *nmp; 3154 3155 NFSLOCKCLSTATE(); 3156 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3157 if (clp->nfsc_cbident == cbident) 3158 break; 3159 } 3160 if (clp == NULL) { 3161 NFSUNLOCKCLSTATE(); 3162 return (NULL); 3163 } 3164 nmp = clp->nfsc_nmp; 3165 NFSUNLOCKCLSTATE(); 3166 return (nmp->nm_mountp); 3167 } 3168 3169 /* 3170 * Search for a lock conflict locally on the client. A conflict occurs if 3171 * - not same owner and overlapping byte range and at least one of them is 3172 * a write lock or this is an unlock. 3173 */ 3174 static int 3175 nfscl_localconflict(struct nfsclclient *clp, struct nfscllock *nlop, 3176 u_int8_t *own, struct nfscldeleg *dp, struct nfscllock **lopp) 3177 { 3178 struct nfsclowner *owp; 3179 struct nfsclopen *op; 3180 int ret; 3181 3182 if (dp != NULL) { 3183 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3184 if (ret) 3185 return (ret); 3186 } 3187 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3188 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3189 ret = nfscl_checkconflict(&op->nfso_lock, nlop, own, 3190 lopp); 3191 if (ret) 3192 return (ret); 3193 } 3194 } 3195 return (0); 3196 } 3197 3198 static int 3199 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3200 u_int8_t *own, struct nfscllock **lopp) 3201 { 3202 struct nfscllockowner *lp; 3203 struct nfscllock *lop; 3204 3205 LIST_FOREACH(lp, lhp, nfsl_list) { 3206 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3207 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3208 if (lop->nfslo_first >= nlop->nfslo_end) 3209 break; 3210 if (lop->nfslo_end <= nlop->nfslo_first) 3211 continue; 3212 if (lop->nfslo_type == F_WRLCK || 3213 nlop->nfslo_type == F_WRLCK || 3214 nlop->nfslo_type == F_UNLCK) { 3215 if (lopp != NULL) 3216 *lopp = lop; 3217 return (NFSERR_DENIED); 3218 } 3219 } 3220 } 3221 } 3222 return (0); 3223 } 3224 3225 /* 3226 * Check for a local conflicting lock. 3227 */ 3228 APPLESTATIC int 3229 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3230 u_int64_t len, struct flock *fl, NFSPROC_T *p) 3231 { 3232 struct nfscllock *lop, nlck; 3233 struct nfscldeleg *dp; 3234 struct nfsnode *np; 3235 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3236 int error; 3237 3238 nlck.nfslo_type = fl->l_type; 3239 nlck.nfslo_first = off; 3240 if (len == NFS64BITSSET) { 3241 nlck.nfslo_end = NFS64BITSSET; 3242 } else { 3243 nlck.nfslo_end = off + len; 3244 if (nlck.nfslo_end <= nlck.nfslo_first) 3245 return (NFSERR_INVAL); 3246 } 3247 np = VTONFS(vp); 3248 nfscl_filllockowner(p, own); 3249 NFSLOCKCLSTATE(); 3250 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3251 error = nfscl_localconflict(clp, &nlck, own, dp, &lop); 3252 if (error == NFSERR_DENIED) 3253 error = EACCES; 3254 if (error) { 3255 fl->l_whence = SEEK_SET; 3256 fl->l_start = lop->nfslo_first; 3257 if (lop->nfslo_end == NFS64BITSSET) 3258 fl->l_len = 0; 3259 else 3260 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3261 fl->l_pid = (pid_t)0; 3262 fl->l_type = lop->nfslo_type; 3263 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3264 fl->l_type == F_RDLCK)) { 3265 /* 3266 * The delegation ensures that there isn't a conflicting 3267 * lock on the server, so return -1 to indicate an RPC 3268 * isn't required. 3269 */ 3270 fl->l_type = F_UNLCK; 3271 error = -1; 3272 } 3273 NFSUNLOCKCLSTATE(); 3274 return (error); 3275 } 3276 3277 /* 3278 * Handle Recall of a delegation. 3279 * The clp must be exclusive locked when this is called. 3280 */ 3281 static int 3282 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3283 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p) 3284 { 3285 struct nfsclowner *owp, *lowp, *nowp; 3286 struct nfsclopen *op, *lop; 3287 struct nfscllockowner *lp; 3288 struct nfscllock *lckp; 3289 struct nfsnode *np; 3290 int error = 0, ret, gotvp = 0; 3291 3292 if (vp == NULL) { 3293 /* 3294 * First, get a vnode for the file. This is needed to do RPCs. 3295 */ 3296 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3297 dp->nfsdl_fhlen, p, &np); 3298 if (ret) { 3299 /* 3300 * File isn't open, so nothing to move over to the 3301 * server. 3302 */ 3303 return (0); 3304 } 3305 vp = NFSTOV(np); 3306 gotvp = 1; 3307 } else { 3308 np = VTONFS(vp); 3309 } 3310 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3311 NFSINVALATTRCACHE(np); 3312 3313 /* 3314 * Ok, if it's a write delegation, flush data to the server, so 3315 * that close/open consistency is retained. 3316 */ 3317 NFSLOCKNODE(np); 3318 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3319 #ifdef APPLE 3320 OSBitOrAtomic((u_int32_t)NDELEGRECALL, (UInt32 *)&np->n_flag); 3321 #else 3322 np->n_flag |= NDELEGRECALL; 3323 #endif 3324 NFSUNLOCKNODE(np); 3325 (void) ncl_flush(vp, MNT_WAIT, cred, p, 1); 3326 NFSLOCKNODE(np); 3327 #ifdef APPLE 3328 OSBitAndAtomic((int32_t)~(NMODIFIED | NDELEGRECALL), (UInt32 *)&np->n_flag); 3329 #else 3330 np->n_flag &= ~(NMODIFIED | NDELEGRECALL); 3331 #endif 3332 } 3333 NFSUNLOCKNODE(np); 3334 3335 /* 3336 * Now, for each openowner with opens issued locally, move them 3337 * over to state against the server. 3338 */ 3339 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3340 lop = LIST_FIRST(&lowp->nfsow_open); 3341 if (lop != NULL) { 3342 if (LIST_NEXT(lop, nfso_list) != NULL) 3343 panic("nfsdlg mult opens"); 3344 /* 3345 * Look for the same openowner against the server. 3346 */ 3347 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3348 if (!NFSBCMP(lowp->nfsow_owner, 3349 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3350 newnfs_copycred(&dp->nfsdl_cred, cred); 3351 ret = nfscl_moveopen(vp, clp, nmp, lop, 3352 owp, dp, cred, p); 3353 if (ret == NFSERR_STALECLIENTID || 3354 ret == NFSERR_STALEDONTRECOVER) { 3355 if (gotvp) 3356 vrele(vp); 3357 return (ret); 3358 } 3359 if (ret) { 3360 nfscl_freeopen(lop, 1); 3361 if (!error) 3362 error = ret; 3363 } 3364 break; 3365 } 3366 } 3367 3368 /* 3369 * If no openowner found, create one and get an open 3370 * for it. 3371 */ 3372 if (owp == NULL) { 3373 MALLOC(nowp, struct nfsclowner *, 3374 sizeof (struct nfsclowner), M_NFSCLOWNER, 3375 M_WAITOK); 3376 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3377 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3378 dp->nfsdl_fhlen, NULL); 3379 newnfs_copycred(&dp->nfsdl_cred, cred); 3380 ret = nfscl_moveopen(vp, clp, nmp, lop, 3381 owp, dp, cred, p); 3382 if (ret) { 3383 nfscl_freeopenowner(owp, 0); 3384 if (ret == NFSERR_STALECLIENTID || 3385 ret == NFSERR_STALEDONTRECOVER) { 3386 if (gotvp) 3387 vrele(vp); 3388 return (ret); 3389 } 3390 if (ret) { 3391 nfscl_freeopen(lop, 1); 3392 if (!error) 3393 error = ret; 3394 } 3395 } 3396 } 3397 } 3398 } 3399 3400 /* 3401 * Now, get byte range locks for any locks done locally. 3402 */ 3403 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3404 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 3405 newnfs_copycred(&dp->nfsdl_cred, cred); 3406 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 3407 if (ret == NFSERR_STALESTATEID || 3408 ret == NFSERR_STALEDONTRECOVER || 3409 ret == NFSERR_STALECLIENTID) { 3410 if (gotvp) 3411 vrele(vp); 3412 return (ret); 3413 } 3414 if (ret && !error) 3415 error = ret; 3416 } 3417 } 3418 if (gotvp) 3419 vrele(vp); 3420 return (error); 3421 } 3422 3423 /* 3424 * Move a locally issued open over to an owner on the state list. 3425 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 3426 * returns with it unlocked. 3427 */ 3428 static int 3429 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3430 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 3431 struct ucred *cred, NFSPROC_T *p) 3432 { 3433 struct nfsclopen *op, *nop; 3434 struct nfscldeleg *ndp; 3435 struct nfsnode *np; 3436 int error = 0, newone; 3437 3438 /* 3439 * First, look for an appropriate open, If found, just increment the 3440 * opencnt in it. 3441 */ 3442 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3443 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 3444 op->nfso_fhlen == lop->nfso_fhlen && 3445 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 3446 op->nfso_opencnt += lop->nfso_opencnt; 3447 nfscl_freeopen(lop, 1); 3448 return (0); 3449 } 3450 } 3451 3452 /* No appropriate open, so we have to do one against the server. */ 3453 np = VTONFS(vp); 3454 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 3455 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 3456 newone = 0; 3457 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 3458 lop->nfso_fh, lop->nfso_fhlen, &newone); 3459 ndp = dp; 3460 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 3461 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 3462 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 3463 if (error) { 3464 if (newone) 3465 nfscl_freeopen(op, 0); 3466 } else { 3467 if (newone) 3468 newnfs_copyincred(cred, &op->nfso_cred); 3469 op->nfso_mode |= lop->nfso_mode; 3470 op->nfso_opencnt += lop->nfso_opencnt; 3471 nfscl_freeopen(lop, 1); 3472 } 3473 if (nop != NULL) 3474 FREE((caddr_t)nop, M_NFSCLOPEN); 3475 if (ndp != NULL) { 3476 /* 3477 * What should I do with the returned delegation, since the 3478 * delegation is being recalled? For now, just printf and 3479 * through it away. 3480 */ 3481 printf("Moveopen returned deleg\n"); 3482 FREE((caddr_t)ndp, M_NFSCLDELEG); 3483 } 3484 return (error); 3485 } 3486 3487 /* 3488 * Recall all delegations on this client. 3489 */ 3490 static void 3491 nfscl_totalrecall(struct nfsclclient *clp) 3492 { 3493 struct nfscldeleg *dp; 3494 3495 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 3496 dp->nfsdl_flags |= NFSCLDL_RECALL; 3497 } 3498 3499 /* 3500 * Relock byte ranges. Called for delegation recall and state expiry. 3501 */ 3502 static int 3503 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3504 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 3505 NFSPROC_T *p) 3506 { 3507 struct nfscllockowner *nlp; 3508 struct nfsfh *nfhp; 3509 u_int64_t off, len; 3510 u_int32_t clidrev = 0; 3511 int error, newone, donelocally; 3512 3513 off = lop->nfslo_first; 3514 len = lop->nfslo_end - lop->nfslo_first; 3515 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 3516 clp, 1, lp->nfsl_owner, lp->nfsl_openowner, &nlp, &newone, 3517 &donelocally); 3518 if (error || donelocally) 3519 return (error); 3520 if (nmp->nm_clp != NULL) 3521 clidrev = nmp->nm_clp->nfsc_clientidrev; 3522 else 3523 clidrev = 0; 3524 nfhp = VTONFS(vp)->n_fhp; 3525 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 3526 nfhp->nfh_len, nlp, newone, 0, off, 3527 len, lop->nfslo_type, cred, p); 3528 if (error) 3529 nfscl_freelockowner(nlp, 0); 3530 return (error); 3531 } 3532 3533 /* 3534 * Called to re-open a file. Basically get a vnode for the file handle 3535 * and then call nfsrpc_openrpc() to do the rest. 3536 */ 3537 static int 3538 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 3539 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 3540 struct ucred *cred, NFSPROC_T *p) 3541 { 3542 struct nfsnode *np; 3543 vnode_t vp; 3544 int error; 3545 3546 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 3547 if (error) 3548 return (error); 3549 vp = NFSTOV(np); 3550 if (np->n_v4 != NULL) { 3551 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 3552 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 3553 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 3554 cred, p); 3555 } else { 3556 error = EINVAL; 3557 } 3558 vrele(vp); 3559 return (error); 3560 } 3561 3562 /* 3563 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 3564 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 3565 * fail. 3566 */ 3567 static int 3568 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 3569 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 3570 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 3571 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 3572 { 3573 int error; 3574 3575 do { 3576 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 3577 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 3578 0, 0); 3579 if (error == NFSERR_DELAY) 3580 (void) nfs_catnap(PZERO, "nfstryop"); 3581 } while (error == NFSERR_DELAY); 3582 if (error == EAUTH || error == EACCES) { 3583 /* Try again using system credentials */ 3584 newnfs_setroot(cred); 3585 do { 3586 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 3587 newfhlen, mode, op, name, namelen, ndpp, reclaim, 3588 delegtype, cred, p, 1, 0); 3589 if (error == NFSERR_DELAY) 3590 (void) nfs_catnap(PZERO, "nfstryop"); 3591 } while (error == NFSERR_DELAY); 3592 } 3593 return (error); 3594 } 3595 3596 /* 3597 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 3598 * NFSERR_DELAY. Also, retry with system credentials, if the provided 3599 * cred don't work. 3600 */ 3601 static int 3602 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 3603 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 3604 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 3605 { 3606 struct nfsrv_descript nfsd, *nd = &nfsd; 3607 int error; 3608 3609 do { 3610 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 3611 reclaim, off, len, type, cred, p, 0); 3612 if (!error && nd->nd_repstat == NFSERR_DELAY) 3613 (void) nfs_catnap(PZERO, "nfstrylck"); 3614 } while (!error && nd->nd_repstat == NFSERR_DELAY); 3615 if (!error) 3616 error = nd->nd_repstat; 3617 if (error == EAUTH || error == EACCES) { 3618 /* Try again using root credentials */ 3619 newnfs_setroot(cred); 3620 do { 3621 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 3622 newone, reclaim, off, len, type, cred, p, 1); 3623 if (!error && nd->nd_repstat == NFSERR_DELAY) 3624 (void) nfs_catnap(PZERO, "nfstrylck"); 3625 } while (!error && nd->nd_repstat == NFSERR_DELAY); 3626 if (!error) 3627 error = nd->nd_repstat; 3628 } 3629 return (error); 3630 } 3631 3632 /* 3633 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 3634 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 3635 * credentials fail. 3636 */ 3637 static int 3638 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 3639 struct nfsmount *nmp, NFSPROC_T *p) 3640 { 3641 int error; 3642 3643 do { 3644 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 3645 if (error == NFSERR_DELAY) 3646 (void) nfs_catnap(PZERO, "nfstrydp"); 3647 } while (error == NFSERR_DELAY); 3648 if (error == EAUTH || error == EACCES) { 3649 /* Try again using system credentials */ 3650 newnfs_setroot(cred); 3651 do { 3652 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 3653 if (error == NFSERR_DELAY) 3654 (void) nfs_catnap(PZERO, "nfstrydp"); 3655 } while (error == NFSERR_DELAY); 3656 } 3657 return (error); 3658 } 3659 3660 /* 3661 * Try a close against the server. Just call nfsrpc_closerpc(), 3662 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 3663 * credentials fail. 3664 */ 3665 APPLESTATIC int 3666 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 3667 struct nfsmount *nmp, NFSPROC_T *p) 3668 { 3669 struct nfsrv_descript nfsd, *nd = &nfsd; 3670 int error; 3671 3672 do { 3673 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 3674 if (error == NFSERR_DELAY) 3675 (void) nfs_catnap(PZERO, "nfstrycl"); 3676 } while (error == NFSERR_DELAY); 3677 if (error == EAUTH || error == EACCES) { 3678 /* Try again using system credentials */ 3679 newnfs_setroot(cred); 3680 do { 3681 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 3682 if (error == NFSERR_DELAY) 3683 (void) nfs_catnap(PZERO, "nfstrycl"); 3684 } while (error == NFSERR_DELAY); 3685 } 3686 return (error); 3687 } 3688 3689 /* 3690 * Decide if a delegation on a file permits close without flushing writes 3691 * to the server. This might be a big performance win in some environments. 3692 * (Not useful until the client does caching on local stable storage.) 3693 */ 3694 APPLESTATIC int 3695 nfscl_mustflush(vnode_t vp) 3696 { 3697 struct nfsclclient *clp; 3698 struct nfscldeleg *dp; 3699 struct nfsnode *np; 3700 struct nfsmount *nmp; 3701 3702 np = VTONFS(vp); 3703 nmp = VFSTONFS(vnode_mount(vp)); 3704 if (!NFSHASNFSV4(nmp)) 3705 return (1); 3706 NFSLOCKCLSTATE(); 3707 clp = nfscl_findcl(nmp); 3708 if (clp == NULL) { 3709 NFSUNLOCKCLSTATE(); 3710 return (1); 3711 } 3712 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3713 if (dp != NULL && (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_RECALL)) 3714 == NFSCLDL_WRITE && 3715 (dp->nfsdl_sizelimit >= np->n_size || 3716 !NFSHASSTRICT3530(nmp))) { 3717 NFSUNLOCKCLSTATE(); 3718 return (0); 3719 } 3720 NFSUNLOCKCLSTATE(); 3721 return (1); 3722 } 3723 3724 /* 3725 * See if a (write) delegation exists for this file. 3726 */ 3727 APPLESTATIC int 3728 nfscl_nodeleg(vnode_t vp, int writedeleg) 3729 { 3730 struct nfsclclient *clp; 3731 struct nfscldeleg *dp; 3732 struct nfsnode *np; 3733 struct nfsmount *nmp; 3734 3735 np = VTONFS(vp); 3736 nmp = VFSTONFS(vnode_mount(vp)); 3737 if (!NFSHASNFSV4(nmp)) 3738 return (1); 3739 NFSLOCKCLSTATE(); 3740 clp = nfscl_findcl(nmp); 3741 if (clp == NULL) { 3742 NFSUNLOCKCLSTATE(); 3743 return (1); 3744 } 3745 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3746 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_RECALL) == 0 && 3747 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) 3748 == NFSCLDL_WRITE)) { 3749 NFSUNLOCKCLSTATE(); 3750 return (0); 3751 } 3752 NFSUNLOCKCLSTATE(); 3753 return (1); 3754 } 3755 3756 /* 3757 * Look for an associated delegation that should be DelegReturned. 3758 */ 3759 APPLESTATIC int 3760 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 3761 { 3762 struct nfsclclient *clp; 3763 struct nfscldeleg *dp; 3764 struct nfsclowner *owp; 3765 struct nfscllockowner *lp; 3766 struct nfsmount *nmp; 3767 struct ucred *cred; 3768 struct nfsnode *np; 3769 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 3770 3771 nmp = VFSTONFS(vnode_mount(vp)); 3772 np = VTONFS(vp); 3773 NFSLOCKCLSTATE(); 3774 /* 3775 * Loop around waiting for: 3776 * - outstanding I/O operations on delegations to complete 3777 * - for a delegation on vp that has state, lock the client and 3778 * do a recall 3779 * - return delegation with no state 3780 */ 3781 while (1) { 3782 clp = nfscl_findcl(nmp); 3783 if (clp == NULL) { 3784 NFSUNLOCKCLSTATE(); 3785 return (retcnt); 3786 } 3787 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3788 np->n_fhp->nfh_len); 3789 if (dp != NULL) { 3790 /* 3791 * Wait for outstanding I/O ops to be done. 3792 */ 3793 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3794 if (igotlock) { 3795 nfsv4_unlock(&clp->nfsc_lock, 0); 3796 igotlock = 0; 3797 } 3798 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3799 (void) nfsmsleep(&dp->nfsdl_rwlock, 3800 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3801 continue; 3802 } 3803 needsrecall = 0; 3804 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3805 if (!LIST_EMPTY(&owp->nfsow_open)) { 3806 needsrecall = 1; 3807 break; 3808 } 3809 } 3810 if (!needsrecall) { 3811 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3812 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3813 needsrecall = 1; 3814 break; 3815 } 3816 } 3817 } 3818 if (needsrecall && !triedrecall) { 3819 islept = 0; 3820 while (!igotlock) { 3821 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 3822 &islept, NFSCLSTATEMUTEXPTR); 3823 if (islept) 3824 break; 3825 } 3826 if (islept) 3827 continue; 3828 NFSUNLOCKCLSTATE(); 3829 cred = newnfs_getcred(); 3830 newnfs_copycred(&dp->nfsdl_cred, cred); 3831 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p); 3832 NFSFREECRED(cred); 3833 triedrecall = 1; 3834 NFSLOCKCLSTATE(); 3835 nfsv4_unlock(&clp->nfsc_lock, 0); 3836 igotlock = 0; 3837 continue; 3838 } 3839 *stp = dp->nfsdl_stateid; 3840 retcnt = 1; 3841 nfscl_cleandeleg(dp); 3842 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3843 } 3844 if (igotlock) 3845 nfsv4_unlock(&clp->nfsc_lock, 0); 3846 NFSUNLOCKCLSTATE(); 3847 return (retcnt); 3848 } 3849 } 3850 3851 /* 3852 * Look for associated delegation(s) that should be DelegReturned. 3853 */ 3854 APPLESTATIC int 3855 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 3856 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 3857 { 3858 struct nfsclclient *clp; 3859 struct nfscldeleg *dp; 3860 struct nfsclowner *owp; 3861 struct nfscllockowner *lp; 3862 struct nfsmount *nmp; 3863 struct ucred *cred; 3864 struct nfsnode *np; 3865 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 3866 3867 nmp = VFSTONFS(vnode_mount(fvp)); 3868 *gotfdp = 0; 3869 *gottdp = 0; 3870 NFSLOCKCLSTATE(); 3871 /* 3872 * Loop around waiting for: 3873 * - outstanding I/O operations on delegations to complete 3874 * - for a delegation on fvp that has state, lock the client and 3875 * do a recall 3876 * - return delegation(s) with no state. 3877 */ 3878 while (1) { 3879 clp = nfscl_findcl(nmp); 3880 if (clp == NULL) { 3881 NFSUNLOCKCLSTATE(); 3882 return (retcnt); 3883 } 3884 np = VTONFS(fvp); 3885 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3886 np->n_fhp->nfh_len); 3887 if (dp != NULL && *gotfdp == 0) { 3888 /* 3889 * Wait for outstanding I/O ops to be done. 3890 */ 3891 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3892 if (igotlock) { 3893 nfsv4_unlock(&clp->nfsc_lock, 0); 3894 igotlock = 0; 3895 } 3896 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3897 (void) nfsmsleep(&dp->nfsdl_rwlock, 3898 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3899 continue; 3900 } 3901 needsrecall = 0; 3902 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3903 if (!LIST_EMPTY(&owp->nfsow_open)) { 3904 needsrecall = 1; 3905 break; 3906 } 3907 } 3908 if (!needsrecall) { 3909 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3910 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3911 needsrecall = 1; 3912 break; 3913 } 3914 } 3915 } 3916 if (needsrecall && !triedrecall) { 3917 islept = 0; 3918 while (!igotlock) { 3919 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 3920 &islept, NFSCLSTATEMUTEXPTR); 3921 if (islept) 3922 break; 3923 } 3924 if (islept) 3925 continue; 3926 NFSUNLOCKCLSTATE(); 3927 cred = newnfs_getcred(); 3928 newnfs_copycred(&dp->nfsdl_cred, cred); 3929 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p); 3930 NFSFREECRED(cred); 3931 triedrecall = 1; 3932 NFSLOCKCLSTATE(); 3933 nfsv4_unlock(&clp->nfsc_lock, 0); 3934 igotlock = 0; 3935 continue; 3936 } 3937 *fstp = dp->nfsdl_stateid; 3938 retcnt++; 3939 *gotfdp = 1; 3940 nfscl_cleandeleg(dp); 3941 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3942 } 3943 if (igotlock) { 3944 nfsv4_unlock(&clp->nfsc_lock, 0); 3945 igotlock = 0; 3946 } 3947 if (tvp != NULL) { 3948 np = VTONFS(tvp); 3949 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3950 np->n_fhp->nfh_len); 3951 if (dp != NULL && *gottdp == 0) { 3952 /* 3953 * Wait for outstanding I/O ops to be done. 3954 */ 3955 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3956 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3957 (void) nfsmsleep(&dp->nfsdl_rwlock, 3958 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3959 continue; 3960 } 3961 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3962 if (!LIST_EMPTY(&owp->nfsow_open)) { 3963 NFSUNLOCKCLSTATE(); 3964 return (retcnt); 3965 } 3966 } 3967 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3968 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3969 NFSUNLOCKCLSTATE(); 3970 return (retcnt); 3971 } 3972 } 3973 *tstp = dp->nfsdl_stateid; 3974 retcnt++; 3975 *gottdp = 1; 3976 nfscl_cleandeleg(dp); 3977 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3978 } 3979 } 3980 NFSUNLOCKCLSTATE(); 3981 return (retcnt); 3982 } 3983 } 3984 3985 /* 3986 * Get a reference on the clientid associated with the mount point. 3987 * Return 1 if success, 0 otherwise. 3988 */ 3989 APPLESTATIC int 3990 nfscl_getref(struct nfsmount *nmp) 3991 { 3992 struct nfsclclient *clp; 3993 3994 NFSLOCKCLSTATE(); 3995 clp = nfscl_findcl(nmp); 3996 if (clp == NULL) { 3997 NFSUNLOCKCLSTATE(); 3998 return (0); 3999 } 4000 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR); 4001 NFSUNLOCKCLSTATE(); 4002 return (1); 4003 } 4004 4005 /* 4006 * Release a reference on a clientid acquired with the above call. 4007 */ 4008 APPLESTATIC void 4009 nfscl_relref(struct nfsmount *nmp) 4010 { 4011 struct nfsclclient *clp; 4012 4013 NFSLOCKCLSTATE(); 4014 clp = nfscl_findcl(nmp); 4015 if (clp == NULL) { 4016 NFSUNLOCKCLSTATE(); 4017 return; 4018 } 4019 nfsv4_relref(&clp->nfsc_lock); 4020 NFSUNLOCKCLSTATE(); 4021 } 4022 4023 /* 4024 * Save the size attribute in the delegation, since the nfsnode 4025 * is going away. 4026 */ 4027 APPLESTATIC void 4028 nfscl_reclaimnode(vnode_t vp) 4029 { 4030 struct nfsclclient *clp; 4031 struct nfscldeleg *dp; 4032 struct nfsnode *np = VTONFS(vp); 4033 struct nfsmount *nmp; 4034 4035 nmp = VFSTONFS(vnode_mount(vp)); 4036 if (!NFSHASNFSV4(nmp)) 4037 return; 4038 NFSLOCKCLSTATE(); 4039 clp = nfscl_findcl(nmp); 4040 if (clp == NULL) { 4041 NFSUNLOCKCLSTATE(); 4042 return; 4043 } 4044 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4045 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4046 dp->nfsdl_size = np->n_size; 4047 NFSUNLOCKCLSTATE(); 4048 } 4049 4050 /* 4051 * Get the saved size attribute in the delegation, since it is a 4052 * newly allocated nfsnode. 4053 */ 4054 APPLESTATIC void 4055 nfscl_newnode(vnode_t vp) 4056 { 4057 struct nfsclclient *clp; 4058 struct nfscldeleg *dp; 4059 struct nfsnode *np = VTONFS(vp); 4060 struct nfsmount *nmp; 4061 4062 nmp = VFSTONFS(vnode_mount(vp)); 4063 if (!NFSHASNFSV4(nmp)) 4064 return; 4065 NFSLOCKCLSTATE(); 4066 clp = nfscl_findcl(nmp); 4067 if (clp == NULL) { 4068 NFSUNLOCKCLSTATE(); 4069 return; 4070 } 4071 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4072 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4073 np->n_size = dp->nfsdl_size; 4074 NFSUNLOCKCLSTATE(); 4075 } 4076 4077 /* 4078 * If there is a valid write delegation for this file, set the modtime 4079 * to the local clock time. 4080 */ 4081 APPLESTATIC void 4082 nfscl_delegmodtime(vnode_t vp) 4083 { 4084 struct nfsclclient *clp; 4085 struct nfscldeleg *dp; 4086 struct nfsnode *np = VTONFS(vp); 4087 struct nfsmount *nmp; 4088 4089 nmp = VFSTONFS(vnode_mount(vp)); 4090 if (!NFSHASNFSV4(nmp)) 4091 return; 4092 NFSLOCKCLSTATE(); 4093 clp = nfscl_findcl(nmp); 4094 if (clp == NULL) { 4095 NFSUNLOCKCLSTATE(); 4096 return; 4097 } 4098 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4099 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4100 NFSGETNANOTIME(&dp->nfsdl_modtime); 4101 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4102 } 4103 NFSUNLOCKCLSTATE(); 4104 } 4105 4106 /* 4107 * If there is a valid write delegation for this file with a modtime set, 4108 * put that modtime in mtime. 4109 */ 4110 APPLESTATIC void 4111 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4112 { 4113 struct nfsclclient *clp; 4114 struct nfscldeleg *dp; 4115 struct nfsnode *np = VTONFS(vp); 4116 struct nfsmount *nmp; 4117 4118 nmp = VFSTONFS(vnode_mount(vp)); 4119 if (!NFSHASNFSV4(nmp)) 4120 return; 4121 NFSLOCKCLSTATE(); 4122 clp = nfscl_findcl(nmp); 4123 if (clp == NULL) { 4124 NFSUNLOCKCLSTATE(); 4125 return; 4126 } 4127 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4128 if (dp != NULL && 4129 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4130 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4131 *mtime = dp->nfsdl_modtime; 4132 NFSUNLOCKCLSTATE(); 4133 } 4134 4135 static int 4136 nfscl_errmap(struct nfsrv_descript *nd) 4137 { 4138 short *defaulterrp, *errp; 4139 4140 if (!nd->nd_repstat) 4141 return (0); 4142 if (nd->nd_procnum == NFSPROC_NOOP) 4143 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4144 if (nd->nd_repstat == EBADRPC) 4145 return (txdr_unsigned(NFSERR_BADXDR)); 4146 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4147 nd->nd_repstat == NFSERR_OPILLEGAL) 4148 return (txdr_unsigned(nd->nd_repstat)); 4149 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4150 while (*++errp) 4151 if (*errp == (short)nd->nd_repstat) 4152 return (txdr_unsigned(nd->nd_repstat)); 4153 return (txdr_unsigned(*defaulterrp)); 4154 } 4155 4156