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 extreme. 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 serialization: 54 * - For the ClientId, it 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 * - The function nfscl_cleanup_common() is executed after a process exits. 68 * It goes 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 u_int8_t *, u_int32_t, struct nfscllockowner **, 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_freealllocks(struct nfscllockownerhead *, int); 118 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 119 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 120 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 121 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 122 struct nfsclopen **, u_int8_t *, u_int8_t *, int, int *); 123 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 124 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 125 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 126 static void nfscl_totalrecall(struct nfsclclient *); 127 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 128 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 129 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 130 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 131 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 132 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 133 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 134 struct ucred *, NFSPROC_T *); 135 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 136 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 137 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *); 138 static int nfscl_errmap(struct nfsrv_descript *); 139 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 140 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 141 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int); 142 static void nfscl_freeopenowner(struct nfsclowner *, int); 143 static void nfscl_cleandeleg(struct nfscldeleg *); 144 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 145 struct nfsmount *, NFSPROC_T *); 146 static void nfscl_emptylockowner(struct nfscllockowner *, 147 struct nfscllockownerfhhead *); 148 149 static short nfscberr_null[] = { 150 0, 151 0, 152 }; 153 154 static short nfscberr_getattr[] = { 155 NFSERR_RESOURCE, 156 NFSERR_BADHANDLE, 157 NFSERR_BADXDR, 158 NFSERR_RESOURCE, 159 NFSERR_SERVERFAULT, 160 0, 161 }; 162 163 static short nfscberr_recall[] = { 164 NFSERR_RESOURCE, 165 NFSERR_BADHANDLE, 166 NFSERR_BADSTATEID, 167 NFSERR_BADXDR, 168 NFSERR_RESOURCE, 169 NFSERR_SERVERFAULT, 170 0, 171 }; 172 173 static short *nfscl_cberrmap[] = { 174 nfscberr_null, 175 nfscberr_null, 176 nfscberr_null, 177 nfscberr_getattr, 178 nfscberr_recall 179 }; 180 181 #define NETFAMILY(clp) \ 182 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 183 184 /* 185 * Called for an open operation. 186 * If the nfhp argument is NULL, just get an openowner. 187 */ 188 APPLESTATIC int 189 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 190 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 191 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 192 { 193 struct nfsclclient *clp; 194 struct nfsclowner *owp, *nowp; 195 struct nfsclopen *op = NULL, *nop = NULL; 196 struct nfscldeleg *dp; 197 struct nfsclownerhead *ohp; 198 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 199 int ret; 200 201 if (newonep != NULL) 202 *newonep = 0; 203 if (opp != NULL) 204 *opp = NULL; 205 if (owpp != NULL) 206 *owpp = NULL; 207 208 /* 209 * Might need one or both of these, so MALLOC them now, to 210 * avoid a tsleep() in MALLOC later. 211 */ 212 MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner), 213 M_NFSCLOWNER, M_WAITOK); 214 if (nfhp != NULL) 215 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 216 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 217 ret = nfscl_getcl(vp, cred, p, &clp); 218 if (ret != 0) { 219 FREE((caddr_t)nowp, M_NFSCLOWNER); 220 if (nop != NULL) 221 FREE((caddr_t)nop, M_NFSCLOPEN); 222 return (ret); 223 } 224 225 /* 226 * Get the Open iff it already exists. 227 * If none found, add the new one or return error, depending upon 228 * "create". 229 */ 230 nfscl_filllockowner(p->td_proc, own, F_POSIX); 231 NFSLOCKCLSTATE(); 232 dp = NULL; 233 /* First check the delegation list */ 234 if (nfhp != NULL && usedeleg) { 235 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 236 if (dp->nfsdl_fhlen == fhlen && 237 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 238 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 239 (dp->nfsdl_flags & NFSCLDL_WRITE)) 240 break; 241 dp = NULL; 242 break; 243 } 244 } 245 } 246 247 if (dp != NULL) 248 ohp = &dp->nfsdl_owner; 249 else 250 ohp = &clp->nfsc_owner; 251 /* Now, search for an openowner */ 252 LIST_FOREACH(owp, ohp, nfsow_list) { 253 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 254 break; 255 } 256 257 /* 258 * Create a new open, as required. 259 */ 260 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 261 newonep); 262 263 /* 264 * Serialize modifications to the open owner for multiple threads 265 * within the same process using a read/write sleep lock. 266 */ 267 if (lockit) 268 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 269 NFSUNLOCKCLSTATE(); 270 if (nowp != NULL) 271 FREE((caddr_t)nowp, M_NFSCLOWNER); 272 if (nop != NULL) 273 FREE((caddr_t)nop, M_NFSCLOPEN); 274 if (owpp != NULL) 275 *owpp = owp; 276 if (opp != NULL) 277 *opp = op; 278 if (retp != NULL) { 279 if (nfhp != NULL && dp != NULL && nop == NULL) 280 /* new local open on delegation */ 281 *retp = NFSCLOPEN_SETCRED; 282 else 283 *retp = NFSCLOPEN_OK; 284 } 285 286 /* 287 * Now, check the mode on the open and return the appropriate 288 * value. 289 */ 290 if (op != NULL && (amode & ~(op->nfso_mode))) { 291 op->nfso_mode |= amode; 292 if (retp != NULL && dp == NULL) 293 *retp = NFSCLOPEN_DOOPEN; 294 } 295 return (0); 296 } 297 298 /* 299 * Create a new open, as required. 300 */ 301 static void 302 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 303 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 304 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 305 int *newonep) 306 { 307 struct nfsclowner *owp = *owpp, *nowp; 308 struct nfsclopen *op, *nop; 309 310 if (nowpp != NULL) 311 nowp = *nowpp; 312 else 313 nowp = NULL; 314 if (nopp != NULL) 315 nop = *nopp; 316 else 317 nop = NULL; 318 if (owp == NULL && nowp != NULL) { 319 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 320 LIST_INIT(&nowp->nfsow_open); 321 nowp->nfsow_clp = clp; 322 nowp->nfsow_seqid = 0; 323 nowp->nfsow_defunct = 0; 324 nfscl_lockinit(&nowp->nfsow_rwlock); 325 if (dp != NULL) { 326 newnfsstats.cllocalopenowners++; 327 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 328 } else { 329 newnfsstats.clopenowners++; 330 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 331 } 332 owp = *owpp = nowp; 333 *nowpp = NULL; 334 if (newonep != NULL) 335 *newonep = 1; 336 } 337 338 /* If an fhp has been specified, create an Open as well. */ 339 if (fhp != NULL) { 340 /* and look for the correct open, based upon FH */ 341 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 342 if (op->nfso_fhlen == fhlen && 343 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 344 break; 345 } 346 if (op == NULL && nop != NULL) { 347 nop->nfso_own = owp; 348 nop->nfso_mode = 0; 349 nop->nfso_opencnt = 0; 350 nop->nfso_posixlock = 1; 351 nop->nfso_fhlen = fhlen; 352 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 353 LIST_INIT(&nop->nfso_lock); 354 nop->nfso_stateid.seqid = 0; 355 nop->nfso_stateid.other[0] = 0; 356 nop->nfso_stateid.other[1] = 0; 357 nop->nfso_stateid.other[2] = 0; 358 if (dp != NULL) { 359 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 360 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 361 nfsdl_list); 362 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 363 newnfsstats.cllocalopens++; 364 } else { 365 newnfsstats.clopens++; 366 } 367 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 368 *opp = nop; 369 *nopp = NULL; 370 if (newonep != NULL) 371 *newonep = 1; 372 } else { 373 *opp = op; 374 } 375 } 376 } 377 378 /* 379 * Called to find/add a delegation to a client. 380 */ 381 APPLESTATIC int 382 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 383 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 384 { 385 struct nfscldeleg *dp = *dpp, *tdp; 386 387 /* 388 * First, if we have received a Read delegation for a file on a 389 * read/write file system, just return it, because they aren't 390 * useful, imho. 391 */ 392 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) && 393 (dp->nfsdl_flags & NFSCLDL_READ)) { 394 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p); 395 FREE((caddr_t)dp, M_NFSCLDELEG); 396 *dpp = NULL; 397 return (0); 398 } 399 400 /* Look for the correct deleg, based upon FH */ 401 NFSLOCKCLSTATE(); 402 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 403 if (tdp == NULL) { 404 if (dp == NULL) { 405 NFSUNLOCKCLSTATE(); 406 return (NFSERR_BADSTATEID); 407 } 408 *dpp = NULL; 409 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 410 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 411 nfsdl_hash); 412 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 413 newnfsstats.cldelegates++; 414 nfscl_delegcnt++; 415 } else { 416 /* 417 * Delegation already exists, what do we do if a new one?? 418 */ 419 if (dp != NULL) { 420 printf("Deleg already exists!\n"); 421 FREE((caddr_t)dp, M_NFSCLDELEG); 422 *dpp = NULL; 423 } else { 424 *dpp = tdp; 425 } 426 } 427 NFSUNLOCKCLSTATE(); 428 return (0); 429 } 430 431 /* 432 * Find a delegation for this file handle. Return NULL upon failure. 433 */ 434 static struct nfscldeleg * 435 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 436 { 437 struct nfscldeleg *dp; 438 439 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 440 if (dp->nfsdl_fhlen == fhlen && 441 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 442 break; 443 } 444 return (dp); 445 } 446 447 /* 448 * Get a stateid for an I/O operation. First, look for an open and iff 449 * found, return either a lockowner stateid or the open stateid. 450 * If no Open is found, just return error and the special stateid of all zeros. 451 */ 452 APPLESTATIC int 453 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 454 struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 455 void **lckpp) 456 { 457 struct nfsclclient *clp; 458 struct nfsclowner *owp; 459 struct nfsclopen *op = NULL; 460 struct nfscllockowner *lp; 461 struct nfscldeleg *dp; 462 struct nfsnode *np; 463 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 464 int error, done; 465 466 *lckpp = NULL; 467 /* 468 * Initially, just set the special stateid of all zeros. 469 */ 470 stateidp->seqid = 0; 471 stateidp->other[0] = 0; 472 stateidp->other[1] = 0; 473 stateidp->other[2] = 0; 474 if (vnode_vtype(vp) != VREG) 475 return (EISDIR); 476 np = VTONFS(vp); 477 NFSLOCKCLSTATE(); 478 clp = nfscl_findcl(VFSTONFS(vnode_mount(vp))); 479 if (clp == NULL) { 480 NFSUNLOCKCLSTATE(); 481 return (EACCES); 482 } 483 484 /* 485 * Wait for recovery to complete. 486 */ 487 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 488 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 489 PZERO, "nfsrecvr", NULL); 490 491 /* 492 * First, look for a delegation. 493 */ 494 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 495 if (dp->nfsdl_fhlen == fhlen && 496 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 497 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 498 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 499 stateidp->seqid = dp->nfsdl_stateid.seqid; 500 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 501 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 502 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 503 if (!(np->n_flag & NDELEGRECALL)) { 504 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 505 nfsdl_list); 506 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 507 nfsdl_list); 508 dp->nfsdl_timestamp = NFSD_MONOSEC + 509 120; 510 dp->nfsdl_rwlock.nfslock_usecnt++; 511 *lckpp = (void *)&dp->nfsdl_rwlock; 512 } 513 NFSUNLOCKCLSTATE(); 514 return (0); 515 } 516 break; 517 } 518 } 519 520 if (p != NULL) { 521 /* 522 * If p != NULL, we want to search the parentage tree 523 * for a matching OpenOwner and use that. 524 */ 525 nfscl_filllockowner(p->td_proc, own, F_POSIX); 526 lp = NULL; 527 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own, 528 mode, &lp, &op); 529 if (error == 0 && lp != NULL) { 530 stateidp->seqid = 531 lp->nfsl_stateid.seqid; 532 stateidp->other[0] = 533 lp->nfsl_stateid.other[0]; 534 stateidp->other[1] = 535 lp->nfsl_stateid.other[1]; 536 stateidp->other[2] = 537 lp->nfsl_stateid.other[2]; 538 NFSUNLOCKCLSTATE(); 539 return (0); 540 } 541 } 542 if (op == NULL) { 543 /* If not found, just look for any OpenOwner that will work. */ 544 done = 0; 545 owp = LIST_FIRST(&clp->nfsc_owner); 546 while (!done && owp != NULL) { 547 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 548 if (op->nfso_fhlen == fhlen && 549 !NFSBCMP(op->nfso_fh, nfhp, fhlen) && 550 (mode & op->nfso_mode) == mode) { 551 done = 1; 552 break; 553 } 554 } 555 if (!done) 556 owp = LIST_NEXT(owp, nfsow_list); 557 } 558 if (!done) { 559 NFSUNLOCKCLSTATE(); 560 return (ENOENT); 561 } 562 /* 563 * For read aheads or write behinds, use the open cred. 564 * A read ahead or write behind is indicated by p == NULL. 565 */ 566 if (p == NULL) 567 newnfs_copycred(&op->nfso_cred, cred); 568 } 569 570 /* 571 * No lock stateid, so return the open stateid. 572 */ 573 stateidp->seqid = op->nfso_stateid.seqid; 574 stateidp->other[0] = op->nfso_stateid.other[0]; 575 stateidp->other[1] = op->nfso_stateid.other[1]; 576 stateidp->other[2] = op->nfso_stateid.other[2]; 577 NFSUNLOCKCLSTATE(); 578 return (0); 579 } 580 581 /* 582 * Search for a matching file, mode and, optionally, lockowner. 583 */ 584 static int 585 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 586 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode, 587 struct nfscllockowner **lpp, struct nfsclopen **opp) 588 { 589 struct nfsclowner *owp; 590 struct nfsclopen *op, *rop, *rop2; 591 struct nfscllockowner *lp; 592 int keep_looping; 593 594 if (lpp != NULL) 595 *lpp = NULL; 596 /* 597 * rop will be set to the open to be returned. There are three 598 * variants of this, all for an open of the correct file: 599 * 1 - A match of lockown. 600 * 2 - A match of the openown, when no lockown match exists. 601 * 3 - A match for any open, if no openown or lockown match exists. 602 * Looking for #2 over #3 probably isn't necessary, but since 603 * RFC3530 is vague w.r.t. the relationship between openowners and 604 * lockowners, I think this is the safer way to go. 605 */ 606 rop = NULL; 607 rop2 = NULL; 608 keep_looping = 1; 609 /* Search the client list */ 610 owp = LIST_FIRST(ohp); 611 while (owp != NULL && keep_looping != 0) { 612 /* and look for the correct open */ 613 op = LIST_FIRST(&owp->nfsow_open); 614 while (op != NULL && keep_looping != 0) { 615 if (op->nfso_fhlen == fhlen && 616 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 617 && (op->nfso_mode & mode) == mode) { 618 if (lpp != NULL) { 619 /* Now look for a matching lockowner. */ 620 LIST_FOREACH(lp, &op->nfso_lock, 621 nfsl_list) { 622 if (!NFSBCMP(lp->nfsl_owner, 623 lockown, 624 NFSV4CL_LOCKNAMELEN)) { 625 *lpp = lp; 626 rop = op; 627 keep_looping = 0; 628 break; 629 } 630 } 631 } 632 if (rop == NULL && !NFSBCMP(owp->nfsow_owner, 633 openown, NFSV4CL_LOCKNAMELEN)) { 634 rop = op; 635 if (lpp == NULL) 636 keep_looping = 0; 637 } 638 if (rop2 == NULL) 639 rop2 = op; 640 } 641 op = LIST_NEXT(op, nfso_list); 642 } 643 owp = LIST_NEXT(owp, nfsow_list); 644 } 645 if (rop == NULL) 646 rop = rop2; 647 if (rop == NULL) 648 return (EBADF); 649 *opp = rop; 650 return (0); 651 } 652 653 /* 654 * Release use of an open owner. Called when open operations are done 655 * with the open owner. 656 */ 657 APPLESTATIC void 658 nfscl_ownerrelease(struct nfsclowner *owp, __unused int error, 659 __unused int candelete, int unlocked) 660 { 661 662 if (owp == NULL) 663 return; 664 NFSLOCKCLSTATE(); 665 if (!unlocked) 666 nfscl_lockunlock(&owp->nfsow_rwlock); 667 nfscl_clrelease(owp->nfsow_clp); 668 NFSUNLOCKCLSTATE(); 669 } 670 671 /* 672 * Release use of an open structure under an open owner. 673 */ 674 APPLESTATIC void 675 nfscl_openrelease(struct nfsclopen *op, int error, int candelete) 676 { 677 struct nfsclclient *clp; 678 struct nfsclowner *owp; 679 680 if (op == NULL) 681 return; 682 NFSLOCKCLSTATE(); 683 owp = op->nfso_own; 684 nfscl_lockunlock(&owp->nfsow_rwlock); 685 clp = owp->nfsow_clp; 686 if (error && candelete && op->nfso_opencnt == 0) 687 nfscl_freeopen(op, 0); 688 nfscl_clrelease(clp); 689 NFSUNLOCKCLSTATE(); 690 } 691 692 /* 693 * Called to get a clientid structure. It will optionally lock the 694 * client data structures to do the SetClientId/SetClientId_confirm, 695 * but will release that lock and return the clientid with a refernce 696 * count on it. 697 * If the "cred" argument is NULL, a new clientid should not be created. 698 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 699 * be done. 700 * It always clpp with a reference count on it, unless returning an error. 701 */ 702 APPLESTATIC int 703 nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p, 704 struct nfsclclient **clpp) 705 { 706 struct nfsclclient *clp; 707 struct nfsclclient *newclp = NULL; 708 struct mount *mp; 709 struct nfsmount *nmp; 710 char uuid[HOSTUUIDLEN]; 711 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 712 u_int16_t idlen = 0; 713 714 mp = vnode_mount(vp); 715 nmp = VFSTONFS(mp); 716 if (cred != NULL) { 717 getcredhostuuid(cred, uuid, sizeof uuid); 718 idlen = strlen(uuid); 719 if (idlen > 0) 720 idlen += sizeof (u_int64_t); 721 else 722 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 723 MALLOC(newclp, struct nfsclclient *, 724 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 725 M_WAITOK); 726 } 727 NFSLOCKCLSTATE(); 728 /* 729 * If a forced dismount is already in progress, don't 730 * allocate a new clientid and get out now. For the case where 731 * clp != NULL, this is a harmless optimization. 732 */ 733 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 734 NFSUNLOCKCLSTATE(); 735 if (newclp != NULL) 736 free(newclp, M_NFSCLCLIENT); 737 return (EBADF); 738 } 739 clp = nmp->nm_clp; 740 if (clp == NULL) { 741 if (newclp == NULL) { 742 NFSUNLOCKCLSTATE(); 743 return (EACCES); 744 } 745 clp = newclp; 746 NFSBZERO((caddr_t)clp, sizeof(struct nfsclclient) + idlen - 1); 747 clp->nfsc_idlen = idlen; 748 LIST_INIT(&clp->nfsc_owner); 749 TAILQ_INIT(&clp->nfsc_deleg); 750 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 751 LIST_INIT(&clp->nfsc_deleghash[i]); 752 clp->nfsc_flags = NFSCLFLAGS_INITED; 753 clp->nfsc_clientidrev = 1; 754 clp->nfsc_cbident = nfscl_nextcbident(); 755 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 756 clp->nfsc_idlen); 757 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 758 nmp->nm_clp = clp; 759 clp->nfsc_nmp = nmp; 760 NFSUNLOCKCLSTATE(); 761 nfscl_start_renewthread(clp); 762 } else { 763 NFSUNLOCKCLSTATE(); 764 if (newclp != NULL) 765 FREE((caddr_t)newclp, M_NFSCLCLIENT); 766 } 767 NFSLOCKCLSTATE(); 768 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 769 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0) 770 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 771 NFSCLSTATEMUTEXPTR, mp); 772 if (!igotlock) 773 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 774 if (igotlock == 0 && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 775 /* 776 * Both nfsv4_lock() and nfsv4_getref() know to check 777 * for MNTK_UNMOUNTF and return without sleeping to 778 * wait for the exclusive lock to be released, since it 779 * might be held by nfscl_umount() and we need to get out 780 * now for that case and not wait until nfscl_umount() 781 * releases it. 782 */ 783 NFSUNLOCKCLSTATE(); 784 return (EBADF); 785 } 786 NFSUNLOCKCLSTATE(); 787 788 /* 789 * If it needs a clientid, do the setclientid now. 790 */ 791 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 792 if (!igotlock) 793 panic("nfscl_clget"); 794 if (p == NULL || cred == NULL) { 795 NFSLOCKCLSTATE(); 796 nfsv4_unlock(&clp->nfsc_lock, 0); 797 NFSUNLOCKCLSTATE(); 798 return (EACCES); 799 } 800 /* 801 * If RFC3530 Sec. 14.2.33 is taken literally, 802 * NFSERR_CLIDINUSE will be returned persistently for the 803 * case where a new mount of the same file system is using 804 * a different principal. In practice, NFSERR_CLIDINUSE is 805 * only returned when there is outstanding unexpired state 806 * on the clientid. As such, try for twice the lease 807 * interval, if we know what that is. Otherwise, make a 808 * wild ass guess. 809 * The case of returning NFSERR_STALECLIENTID is far less 810 * likely, but might occur if there is a significant delay 811 * between doing the SetClientID and SetClientIDConfirm Ops, 812 * such that the server throws away the clientid before 813 * receiving the SetClientIDConfirm. 814 */ 815 if (clp->nfsc_renew > 0) 816 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 817 else 818 clidinusedelay = 120; 819 trystalecnt = 3; 820 do { 821 error = nfsrpc_setclient(VFSTONFS(vnode_mount(vp)), 822 clp, cred, p); 823 if (error == NFSERR_STALECLIENTID || 824 error == NFSERR_STALEDONTRECOVER || 825 error == NFSERR_CLIDINUSE) { 826 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 827 } 828 } while (((error == NFSERR_STALECLIENTID || 829 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 830 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 831 if (error) { 832 NFSLOCKCLSTATE(); 833 nfsv4_unlock(&clp->nfsc_lock, 0); 834 NFSUNLOCKCLSTATE(); 835 return (error); 836 } 837 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 838 } 839 if (igotlock) { 840 NFSLOCKCLSTATE(); 841 nfsv4_unlock(&clp->nfsc_lock, 1); 842 NFSUNLOCKCLSTATE(); 843 } 844 845 *clpp = clp; 846 return (0); 847 } 848 849 /* 850 * Get a reference to a clientid and return it, if valid. 851 */ 852 APPLESTATIC struct nfsclclient * 853 nfscl_findcl(struct nfsmount *nmp) 854 { 855 struct nfsclclient *clp; 856 857 clp = nmp->nm_clp; 858 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 859 return (NULL); 860 return (clp); 861 } 862 863 /* 864 * Release the clientid structure. It may be locked or reference counted. 865 */ 866 static void 867 nfscl_clrelease(struct nfsclclient *clp) 868 { 869 870 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 871 nfsv4_unlock(&clp->nfsc_lock, 0); 872 else 873 nfsv4_relref(&clp->nfsc_lock); 874 } 875 876 /* 877 * External call for nfscl_clrelease. 878 */ 879 APPLESTATIC void 880 nfscl_clientrelease(struct nfsclclient *clp) 881 { 882 883 NFSLOCKCLSTATE(); 884 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 885 nfsv4_unlock(&clp->nfsc_lock, 0); 886 else 887 nfsv4_relref(&clp->nfsc_lock); 888 NFSUNLOCKCLSTATE(); 889 } 890 891 /* 892 * Called when wanting to lock a byte region. 893 */ 894 APPLESTATIC int 895 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 896 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 897 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 898 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 899 { 900 struct nfscllockowner *lp; 901 struct nfsclopen *op; 902 struct nfsclclient *clp; 903 struct nfscllockowner *nlp; 904 struct nfscllock *nlop, *otherlop; 905 struct nfscldeleg *dp = NULL, *ldp = NULL; 906 struct nfscllockownerhead *lhp = NULL; 907 struct nfsnode *np; 908 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 909 u_int8_t *openownp; 910 int error = 0, ret, donelocally = 0; 911 u_int32_t mode; 912 913 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 914 mode = 0; 915 np = VTONFS(vp); 916 *lpp = NULL; 917 lp = NULL; 918 *newonep = 0; 919 *donelocallyp = 0; 920 921 /* 922 * Might need these, so MALLOC them now, to 923 * avoid a tsleep() in MALLOC later. 924 */ 925 MALLOC(nlp, struct nfscllockowner *, 926 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 927 MALLOC(otherlop, struct nfscllock *, 928 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 929 MALLOC(nlop, struct nfscllock *, 930 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 931 nlop->nfslo_type = type; 932 nlop->nfslo_first = off; 933 if (len == NFS64BITSSET) { 934 nlop->nfslo_end = NFS64BITSSET; 935 } else { 936 nlop->nfslo_end = off + len; 937 if (nlop->nfslo_end <= nlop->nfslo_first) 938 error = NFSERR_INVAL; 939 } 940 941 if (!error) { 942 if (recovery) 943 clp = rclp; 944 else 945 error = nfscl_getcl(vp, cred, p, &clp); 946 } 947 if (error) { 948 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 949 FREE((caddr_t)otherlop, M_NFSCLLOCK); 950 FREE((caddr_t)nlop, M_NFSCLLOCK); 951 return (error); 952 } 953 954 op = NULL; 955 if (recovery) { 956 ownp = rownp; 957 openownp = ropenownp; 958 } else { 959 nfscl_filllockowner(id, own, flags); 960 ownp = own; 961 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 962 openownp = openown; 963 } 964 if (!recovery) { 965 NFSLOCKCLSTATE(); 966 /* 967 * First, search for a delegation. If one exists for this file, 968 * the lock can be done locally against it, so long as there 969 * isn't a local lock conflict. 970 */ 971 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 972 np->n_fhp->nfh_len); 973 /* Just sanity check for correct type of delegation */ 974 if (dp != NULL && ((dp->nfsdl_flags & 975 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 976 (type == F_WRLCK && 977 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 978 dp = NULL; 979 } 980 if (dp != NULL) { 981 /* Now, find an open and maybe a lockowner. */ 982 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 983 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 984 if (ret) 985 ret = nfscl_getopen(&clp->nfsc_owner, 986 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 987 ownp, mode, NULL, &op); 988 if (!ret) { 989 lhp = &dp->nfsdl_lock; 990 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 991 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 992 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 993 donelocally = 1; 994 } else { 995 dp = NULL; 996 } 997 } 998 if (!donelocally) { 999 /* 1000 * Get the related Open and maybe lockowner. 1001 */ 1002 error = nfscl_getopen(&clp->nfsc_owner, 1003 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1004 ownp, mode, &lp, &op); 1005 if (!error) 1006 lhp = &op->nfso_lock; 1007 } 1008 if (!error && !recovery) 1009 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1010 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1011 if (error) { 1012 if (!recovery) { 1013 nfscl_clrelease(clp); 1014 NFSUNLOCKCLSTATE(); 1015 } 1016 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1017 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1018 FREE((caddr_t)nlop, M_NFSCLLOCK); 1019 return (error); 1020 } 1021 1022 /* 1023 * Ok, see if a lockowner exists and create one, as required. 1024 */ 1025 if (lp == NULL) 1026 LIST_FOREACH(lp, lhp, nfsl_list) { 1027 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1028 break; 1029 } 1030 if (lp == NULL) { 1031 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1032 if (recovery) 1033 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1034 NFSV4CL_LOCKNAMELEN); 1035 else 1036 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1037 NFSV4CL_LOCKNAMELEN); 1038 nlp->nfsl_seqid = 0; 1039 nlp->nfsl_lockflags = flags; 1040 nlp->nfsl_inprog = NULL; 1041 nfscl_lockinit(&nlp->nfsl_rwlock); 1042 LIST_INIT(&nlp->nfsl_lock); 1043 if (donelocally) { 1044 nlp->nfsl_open = NULL; 1045 newnfsstats.cllocallockowners++; 1046 } else { 1047 nlp->nfsl_open = op; 1048 newnfsstats.cllockowners++; 1049 } 1050 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1051 lp = nlp; 1052 nlp = NULL; 1053 *newonep = 1; 1054 } 1055 1056 /* 1057 * Now, update the byte ranges for locks. 1058 */ 1059 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1060 if (!ret) 1061 donelocally = 1; 1062 if (donelocally) { 1063 *donelocallyp = 1; 1064 if (!recovery) 1065 nfscl_clrelease(clp); 1066 } else { 1067 /* 1068 * Serial modifications on the lock owner for multiple threads 1069 * for the same process using a read/write lock. 1070 */ 1071 if (!recovery) 1072 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1073 } 1074 if (!recovery) 1075 NFSUNLOCKCLSTATE(); 1076 1077 if (nlp) 1078 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1079 if (nlop) 1080 FREE((caddr_t)nlop, M_NFSCLLOCK); 1081 if (otherlop) 1082 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1083 1084 *lpp = lp; 1085 return (0); 1086 } 1087 1088 /* 1089 * Called to unlock a byte range, for LockU. 1090 */ 1091 APPLESTATIC int 1092 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1093 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1094 struct nfsclclient *clp, void *id, int flags, 1095 struct nfscllockowner **lpp, int *dorpcp) 1096 { 1097 struct nfscllockowner *lp; 1098 struct nfsclowner *owp; 1099 struct nfsclopen *op; 1100 struct nfscllock *nlop, *other_lop = NULL; 1101 struct nfscldeleg *dp; 1102 struct nfsnode *np; 1103 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1104 int ret = 0, fnd; 1105 1106 np = VTONFS(vp); 1107 *lpp = NULL; 1108 *dorpcp = 0; 1109 1110 /* 1111 * Might need these, so MALLOC them now, to 1112 * avoid a tsleep() in MALLOC later. 1113 */ 1114 MALLOC(nlop, struct nfscllock *, 1115 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1116 nlop->nfslo_type = F_UNLCK; 1117 nlop->nfslo_first = off; 1118 if (len == NFS64BITSSET) { 1119 nlop->nfslo_end = NFS64BITSSET; 1120 } else { 1121 nlop->nfslo_end = off + len; 1122 if (nlop->nfslo_end <= nlop->nfslo_first) { 1123 FREE((caddr_t)nlop, M_NFSCLLOCK); 1124 return (NFSERR_INVAL); 1125 } 1126 } 1127 if (callcnt == 0) { 1128 MALLOC(other_lop, struct nfscllock *, 1129 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1130 *other_lop = *nlop; 1131 } 1132 nfscl_filllockowner(id, own, flags); 1133 dp = NULL; 1134 NFSLOCKCLSTATE(); 1135 if (callcnt == 0) 1136 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1137 np->n_fhp->nfh_len); 1138 1139 /* 1140 * First, unlock any local regions on a delegation. 1141 */ 1142 if (dp != NULL) { 1143 /* Look for this lockowner. */ 1144 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1145 if (!NFSBCMP(lp->nfsl_owner, own, 1146 NFSV4CL_LOCKNAMELEN)) 1147 break; 1148 } 1149 if (lp != NULL) 1150 /* Use other_lop, so nlop is still available */ 1151 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1152 } 1153 1154 /* 1155 * Now, find a matching open/lockowner that hasn't already been done, 1156 * as marked by nfsl_inprog. 1157 */ 1158 lp = NULL; 1159 fnd = 0; 1160 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1161 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1162 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1163 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1164 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1165 if (lp->nfsl_inprog == NULL && 1166 !NFSBCMP(lp->nfsl_owner, own, 1167 NFSV4CL_LOCKNAMELEN)) { 1168 fnd = 1; 1169 break; 1170 } 1171 } 1172 if (fnd) 1173 break; 1174 } 1175 } 1176 if (fnd) 1177 break; 1178 } 1179 1180 if (lp != NULL) { 1181 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1182 if (ret) 1183 *dorpcp = 1; 1184 /* 1185 * Serial modifications on the lock owner for multiple 1186 * threads for the same process using a read/write lock. 1187 */ 1188 lp->nfsl_inprog = p; 1189 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1190 *lpp = lp; 1191 } 1192 NFSUNLOCKCLSTATE(); 1193 if (nlop) 1194 FREE((caddr_t)nlop, M_NFSCLLOCK); 1195 if (other_lop) 1196 FREE((caddr_t)other_lop, M_NFSCLLOCK); 1197 return (0); 1198 } 1199 1200 /* 1201 * Release all lockowners marked in progess for this process and file. 1202 */ 1203 APPLESTATIC void 1204 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1205 void *id, int flags) 1206 { 1207 struct nfsclowner *owp; 1208 struct nfsclopen *op; 1209 struct nfscllockowner *lp; 1210 struct nfsnode *np; 1211 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1212 1213 np = VTONFS(vp); 1214 nfscl_filllockowner(id, own, flags); 1215 NFSLOCKCLSTATE(); 1216 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1217 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1218 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1219 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1220 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1221 if (lp->nfsl_inprog == p && 1222 !NFSBCMP(lp->nfsl_owner, own, 1223 NFSV4CL_LOCKNAMELEN)) { 1224 lp->nfsl_inprog = NULL; 1225 nfscl_lockunlock(&lp->nfsl_rwlock); 1226 } 1227 } 1228 } 1229 } 1230 } 1231 nfscl_clrelease(clp); 1232 NFSUNLOCKCLSTATE(); 1233 } 1234 1235 /* 1236 * Called to find out if any bytes within the byte range specified are 1237 * write locked by the calling process. Used to determine if flushing 1238 * is required before a LockU. 1239 * If in doubt, return 1, so the flush will occur. 1240 */ 1241 APPLESTATIC int 1242 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1243 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1244 { 1245 struct nfsclowner *owp; 1246 struct nfscllockowner *lp; 1247 struct nfsclopen *op; 1248 struct nfsclclient *clp; 1249 struct nfscllock *lop; 1250 struct nfscldeleg *dp; 1251 struct nfsnode *np; 1252 u_int64_t off, end; 1253 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1254 int error = 0; 1255 1256 np = VTONFS(vp); 1257 switch (fl->l_whence) { 1258 case SEEK_SET: 1259 case SEEK_CUR: 1260 /* 1261 * Caller is responsible for adding any necessary offset 1262 * when SEEK_CUR is used. 1263 */ 1264 off = fl->l_start; 1265 break; 1266 case SEEK_END: 1267 off = np->n_size + fl->l_start; 1268 break; 1269 default: 1270 return (1); 1271 }; 1272 if (fl->l_len != 0) { 1273 end = off + fl->l_len; 1274 if (end < off) 1275 return (1); 1276 } else { 1277 end = NFS64BITSSET; 1278 } 1279 1280 error = nfscl_getcl(vp, cred, p, &clp); 1281 if (error) 1282 return (1); 1283 nfscl_filllockowner(id, own, flags); 1284 NFSLOCKCLSTATE(); 1285 1286 /* 1287 * First check the delegation locks. 1288 */ 1289 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1290 if (dp != NULL) { 1291 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1292 if (!NFSBCMP(lp->nfsl_owner, own, 1293 NFSV4CL_LOCKNAMELEN)) 1294 break; 1295 } 1296 if (lp != NULL) { 1297 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1298 if (lop->nfslo_first >= end) 1299 break; 1300 if (lop->nfslo_end <= off) 1301 continue; 1302 if (lop->nfslo_type == F_WRLCK) { 1303 nfscl_clrelease(clp); 1304 NFSUNLOCKCLSTATE(); 1305 return (1); 1306 } 1307 } 1308 } 1309 } 1310 1311 /* 1312 * Now, check state against the server. 1313 */ 1314 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1315 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1316 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1317 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1318 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1319 if (!NFSBCMP(lp->nfsl_owner, own, 1320 NFSV4CL_LOCKNAMELEN)) 1321 break; 1322 } 1323 if (lp != NULL) { 1324 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1325 if (lop->nfslo_first >= end) 1326 break; 1327 if (lop->nfslo_end <= off) 1328 continue; 1329 if (lop->nfslo_type == F_WRLCK) { 1330 nfscl_clrelease(clp); 1331 NFSUNLOCKCLSTATE(); 1332 return (1); 1333 } 1334 } 1335 } 1336 } 1337 } 1338 } 1339 nfscl_clrelease(clp); 1340 NFSUNLOCKCLSTATE(); 1341 return (0); 1342 } 1343 1344 /* 1345 * Release a byte range lock owner structure. 1346 */ 1347 APPLESTATIC void 1348 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1349 { 1350 struct nfsclclient *clp; 1351 1352 if (lp == NULL) 1353 return; 1354 NFSLOCKCLSTATE(); 1355 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1356 if (error != 0 && candelete && 1357 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1358 nfscl_freelockowner(lp, 0); 1359 else 1360 nfscl_lockunlock(&lp->nfsl_rwlock); 1361 nfscl_clrelease(clp); 1362 NFSUNLOCKCLSTATE(); 1363 } 1364 1365 /* 1366 * Free up an open structure and any associated byte range lock structures. 1367 */ 1368 APPLESTATIC void 1369 nfscl_freeopen(struct nfsclopen *op, int local) 1370 { 1371 1372 LIST_REMOVE(op, nfso_list); 1373 nfscl_freealllocks(&op->nfso_lock, local); 1374 FREE((caddr_t)op, M_NFSCLOPEN); 1375 if (local) 1376 newnfsstats.cllocalopens--; 1377 else 1378 newnfsstats.clopens--; 1379 } 1380 1381 /* 1382 * Free up all lock owners and associated locks. 1383 */ 1384 static void 1385 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1386 { 1387 struct nfscllockowner *lp, *nlp; 1388 1389 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1390 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1391 panic("nfscllckw"); 1392 nfscl_freelockowner(lp, local); 1393 } 1394 } 1395 1396 /* 1397 * Called for an Open when NFSERR_EXPIRED is received from the server. 1398 * If there are no byte range locks nor a Share Deny lost, try to do a 1399 * fresh Open. Otherwise, free the open. 1400 */ 1401 static int 1402 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1403 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1404 { 1405 struct nfscllockowner *lp; 1406 struct nfscldeleg *dp; 1407 int mustdelete = 0, error; 1408 1409 /* 1410 * Look for any byte range lock(s). 1411 */ 1412 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1413 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1414 mustdelete = 1; 1415 break; 1416 } 1417 } 1418 1419 /* 1420 * If no byte range lock(s) nor a Share deny, try to re-open. 1421 */ 1422 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1423 newnfs_copycred(&op->nfso_cred, cred); 1424 dp = NULL; 1425 error = nfsrpc_reopen(nmp, op->nfso_fh, 1426 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1427 if (error) { 1428 mustdelete = 1; 1429 if (dp != NULL) { 1430 FREE((caddr_t)dp, M_NFSCLDELEG); 1431 dp = NULL; 1432 } 1433 } 1434 if (dp != NULL) 1435 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1436 op->nfso_fhlen, cred, p, &dp); 1437 } 1438 1439 /* 1440 * If a byte range lock or Share deny or couldn't re-open, free it. 1441 */ 1442 if (mustdelete) 1443 nfscl_freeopen(op, 0); 1444 return (mustdelete); 1445 } 1446 1447 /* 1448 * Free up an open owner structure. 1449 */ 1450 static void 1451 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1452 { 1453 1454 LIST_REMOVE(owp, nfsow_list); 1455 FREE((caddr_t)owp, M_NFSCLOWNER); 1456 if (local) 1457 newnfsstats.cllocalopenowners--; 1458 else 1459 newnfsstats.clopenowners--; 1460 } 1461 1462 /* 1463 * Free up a byte range lock owner structure. 1464 */ 1465 APPLESTATIC void 1466 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1467 { 1468 struct nfscllock *lop, *nlop; 1469 1470 LIST_REMOVE(lp, nfsl_list); 1471 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1472 nfscl_freelock(lop, local); 1473 } 1474 FREE((caddr_t)lp, M_NFSCLLOCKOWNER); 1475 if (local) 1476 newnfsstats.cllocallockowners--; 1477 else 1478 newnfsstats.cllockowners--; 1479 } 1480 1481 /* 1482 * Free up a byte range lock structure. 1483 */ 1484 APPLESTATIC void 1485 nfscl_freelock(struct nfscllock *lop, int local) 1486 { 1487 1488 LIST_REMOVE(lop, nfslo_list); 1489 FREE((caddr_t)lop, M_NFSCLLOCK); 1490 if (local) 1491 newnfsstats.cllocallocks--; 1492 else 1493 newnfsstats.cllocks--; 1494 } 1495 1496 /* 1497 * Clean out the state related to a delegation. 1498 */ 1499 static void 1500 nfscl_cleandeleg(struct nfscldeleg *dp) 1501 { 1502 struct nfsclowner *owp, *nowp; 1503 struct nfsclopen *op; 1504 1505 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1506 op = LIST_FIRST(&owp->nfsow_open); 1507 if (op != NULL) { 1508 if (LIST_NEXT(op, nfso_list) != NULL) 1509 panic("nfscleandel"); 1510 nfscl_freeopen(op, 1); 1511 } 1512 nfscl_freeopenowner(owp, 1); 1513 } 1514 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1515 } 1516 1517 /* 1518 * Free a delegation. 1519 */ 1520 static void 1521 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1522 { 1523 1524 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1525 LIST_REMOVE(dp, nfsdl_hash); 1526 FREE((caddr_t)dp, M_NFSCLDELEG); 1527 newnfsstats.cldelegates--; 1528 nfscl_delegcnt--; 1529 } 1530 1531 /* 1532 * Free up all state related to this client structure. 1533 */ 1534 static void 1535 nfscl_cleanclient(struct nfsclclient *clp) 1536 { 1537 struct nfsclowner *owp, *nowp; 1538 struct nfsclopen *op, *nop; 1539 1540 /* Now, all the OpenOwners, etc. */ 1541 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1542 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1543 nfscl_freeopen(op, 0); 1544 } 1545 nfscl_freeopenowner(owp, 0); 1546 } 1547 } 1548 1549 /* 1550 * Called when an NFSERR_EXPIRED is received from the server. 1551 */ 1552 static void 1553 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1554 struct ucred *cred, NFSPROC_T *p) 1555 { 1556 struct nfsclowner *owp, *nowp, *towp; 1557 struct nfsclopen *op, *nop, *top; 1558 struct nfscldeleg *dp, *ndp; 1559 int ret, printed = 0; 1560 1561 /* 1562 * First, merge locally issued Opens into the list for the server. 1563 */ 1564 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1565 while (dp != NULL) { 1566 ndp = TAILQ_NEXT(dp, nfsdl_list); 1567 owp = LIST_FIRST(&dp->nfsdl_owner); 1568 while (owp != NULL) { 1569 nowp = LIST_NEXT(owp, nfsow_list); 1570 op = LIST_FIRST(&owp->nfsow_open); 1571 if (op != NULL) { 1572 if (LIST_NEXT(op, nfso_list) != NULL) 1573 panic("nfsclexp"); 1574 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1575 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1576 NFSV4CL_LOCKNAMELEN)) 1577 break; 1578 } 1579 if (towp != NULL) { 1580 /* Merge opens in */ 1581 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1582 if (top->nfso_fhlen == op->nfso_fhlen && 1583 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1584 op->nfso_fhlen)) { 1585 top->nfso_mode |= op->nfso_mode; 1586 top->nfso_opencnt += op->nfso_opencnt; 1587 break; 1588 } 1589 } 1590 if (top == NULL) { 1591 /* Just add the open to the owner list */ 1592 LIST_REMOVE(op, nfso_list); 1593 op->nfso_own = towp; 1594 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1595 newnfsstats.cllocalopens--; 1596 newnfsstats.clopens++; 1597 } 1598 } else { 1599 /* Just add the openowner to the client list */ 1600 LIST_REMOVE(owp, nfsow_list); 1601 owp->nfsow_clp = clp; 1602 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1603 newnfsstats.cllocalopenowners--; 1604 newnfsstats.clopenowners++; 1605 newnfsstats.cllocalopens--; 1606 newnfsstats.clopens++; 1607 } 1608 } 1609 owp = nowp; 1610 } 1611 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1612 printed = 1; 1613 printf("nfsv4 expired locks lost\n"); 1614 } 1615 nfscl_cleandeleg(dp); 1616 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1617 dp = ndp; 1618 } 1619 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1620 panic("nfsclexp"); 1621 1622 /* 1623 * Now, try and reopen against the server. 1624 */ 1625 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1626 owp->nfsow_seqid = 0; 1627 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1628 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1629 if (ret && !printed) { 1630 printed = 1; 1631 printf("nfsv4 expired locks lost\n"); 1632 } 1633 } 1634 if (LIST_EMPTY(&owp->nfsow_open)) 1635 nfscl_freeopenowner(owp, 0); 1636 } 1637 } 1638 1639 /* 1640 * This function must be called after the process represented by "own" has 1641 * exited. Must be called with CLSTATE lock held. 1642 */ 1643 static void 1644 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1645 { 1646 struct nfsclowner *owp, *nowp; 1647 struct nfscllockowner *lp, *nlp; 1648 struct nfscldeleg *dp; 1649 1650 /* First, get rid of local locks on delegations. */ 1651 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1652 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1653 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1654 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1655 panic("nfscllckw"); 1656 nfscl_freelockowner(lp, 1); 1657 } 1658 } 1659 } 1660 owp = LIST_FIRST(&clp->nfsc_owner); 1661 while (owp != NULL) { 1662 nowp = LIST_NEXT(owp, nfsow_list); 1663 if (!NFSBCMP(owp->nfsow_owner, own, 1664 NFSV4CL_LOCKNAMELEN)) { 1665 /* 1666 * If there are children that haven't closed the 1667 * file descriptors yet, the opens will still be 1668 * here. For that case, let the renew thread clear 1669 * out the OpenOwner later. 1670 */ 1671 if (LIST_EMPTY(&owp->nfsow_open)) 1672 nfscl_freeopenowner(owp, 0); 1673 else 1674 owp->nfsow_defunct = 1; 1675 } 1676 owp = nowp; 1677 } 1678 } 1679 1680 /* 1681 * Find open/lock owners for processes that have exited. 1682 */ 1683 static void 1684 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1685 { 1686 struct nfsclowner *owp, *nowp; 1687 struct nfsclopen *op; 1688 struct nfscllockowner *lp, *nlp; 1689 1690 NFSPROCLISTLOCK(); 1691 NFSLOCKCLSTATE(); 1692 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1693 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1694 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1695 if (LIST_EMPTY(&lp->nfsl_lock)) 1696 nfscl_emptylockowner(lp, lhp); 1697 } 1698 } 1699 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1700 nfscl_cleanup_common(clp, owp->nfsow_owner); 1701 } 1702 NFSUNLOCKCLSTATE(); 1703 NFSPROCLISTUNLOCK(); 1704 } 1705 1706 /* 1707 * Take the empty lock owner and move it to the local lhp list if the 1708 * associated process no longer exists. 1709 */ 1710 static void 1711 nfscl_emptylockowner(struct nfscllockowner *lp, 1712 struct nfscllockownerfhhead *lhp) 1713 { 1714 struct nfscllockownerfh *lfhp, *mylfhp; 1715 struct nfscllockowner *nlp; 1716 int fnd_it; 1717 1718 /* If not a Posix lock owner, just return. */ 1719 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1720 return; 1721 1722 fnd_it = 0; 1723 mylfhp = NULL; 1724 /* 1725 * First, search to see if this lock owner is already in the list. 1726 * If it is, then the associated process no longer exists. 1727 */ 1728 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1729 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1730 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1731 lfhp->nfslfh_len)) 1732 mylfhp = lfhp; 1733 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1734 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1735 NFSV4CL_LOCKNAMELEN)) 1736 fnd_it = 1; 1737 } 1738 /* If not found, check if process still exists. */ 1739 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1740 return; 1741 1742 /* Move the lock owner over to the local list. */ 1743 if (mylfhp == NULL) { 1744 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1745 M_NOWAIT); 1746 if (mylfhp == NULL) 1747 return; 1748 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1749 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1750 mylfhp->nfslfh_len); 1751 LIST_INIT(&mylfhp->nfslfh_lock); 1752 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1753 } 1754 LIST_REMOVE(lp, nfsl_list); 1755 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1756 } 1757 1758 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1759 /* 1760 * Called from nfs umount to free up the clientid. 1761 */ 1762 APPLESTATIC void 1763 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1764 { 1765 struct nfsclclient *clp; 1766 struct ucred *cred; 1767 int igotlock; 1768 1769 /* 1770 * For the case that matters, this is the thread that set 1771 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1772 * done to ensure that any thread executing nfscl_getcl() after 1773 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1774 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1775 * explanation, courtesy of Alan Cox. 1776 * What follows is a snippet from Alan Cox's email at: 1777 * http://docs.FreeBSD.org/cgi/ 1778 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1779 * 1780 * 1. Set MNTK_UNMOUNTF 1781 * 2. Acquire a standard FreeBSD mutex "m". 1782 * 3. Update some data structures. 1783 * 4. Release mutex "m". 1784 * 1785 * Then, other threads that acquire "m" after step 4 has occurred will 1786 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1787 * step 2 may or may not see MNTK_UNMOUNTF as set. 1788 */ 1789 NFSLOCKCLSTATE(); 1790 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1791 fake_global++; 1792 NFSUNLOCKCLSTATE(); 1793 NFSLOCKCLSTATE(); 1794 } 1795 1796 clp = nmp->nm_clp; 1797 if (clp != NULL) { 1798 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1799 panic("nfscl umount"); 1800 1801 /* 1802 * First, handshake with the nfscl renew thread, to terminate 1803 * it. 1804 */ 1805 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1806 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1807 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1808 "nfsclumnt", hz); 1809 1810 /* 1811 * Now, get the exclusive lock on the client state, so 1812 * that no uses of the state are still in progress. 1813 */ 1814 do { 1815 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1816 NFSCLSTATEMUTEXPTR, NULL); 1817 } while (!igotlock); 1818 NFSUNLOCKCLSTATE(); 1819 1820 /* 1821 * Free up all the state. It will expire on the server, but 1822 * maybe we should do a SetClientId/SetClientIdConfirm so 1823 * the server throws it away? 1824 */ 1825 LIST_REMOVE(clp, nfsc_list); 1826 nfscl_delegreturnall(clp, p); 1827 cred = newnfs_getcred(); 1828 (void) nfsrpc_setclient(nmp, clp, cred, p); 1829 nfscl_cleanclient(clp); 1830 nmp->nm_clp = NULL; 1831 NFSFREECRED(cred); 1832 FREE((caddr_t)clp, M_NFSCLCLIENT); 1833 } else 1834 NFSUNLOCKCLSTATE(); 1835 } 1836 1837 /* 1838 * This function is called when a server replies with NFSERR_STALECLIENTID 1839 * or NFSERR_STALESTATEID. It traverses the clientid lists, doing Opens 1840 * and Locks with reclaim. If these fail, it deletes the corresponding state. 1841 */ 1842 static void 1843 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1844 { 1845 struct nfsclowner *owp, *nowp; 1846 struct nfsclopen *op, *nop; 1847 struct nfscllockowner *lp, *nlp; 1848 struct nfscllock *lop, *nlop; 1849 struct nfscldeleg *dp, *ndp, *tdp; 1850 struct nfsmount *nmp; 1851 struct ucred *tcred; 1852 struct nfsclopenhead extra_open; 1853 struct nfscldeleghead extra_deleg; 1854 struct nfsreq *rep; 1855 u_int64_t len; 1856 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1857 int igotlock = 0, error, trycnt, firstlock, s; 1858 1859 /* 1860 * First, lock the client structure, so everyone else will 1861 * block when trying to use state. 1862 */ 1863 NFSLOCKCLSTATE(); 1864 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1865 do { 1866 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1867 NFSCLSTATEMUTEXPTR, NULL); 1868 } while (!igotlock); 1869 NFSUNLOCKCLSTATE(); 1870 1871 nmp = clp->nfsc_nmp; 1872 if (nmp == NULL) 1873 panic("nfscl recover"); 1874 trycnt = 5; 1875 do { 1876 error = nfsrpc_setclient(nmp, clp, cred, p); 1877 } while ((error == NFSERR_STALECLIENTID || 1878 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 1879 if (error) { 1880 nfscl_cleanclient(clp); 1881 NFSLOCKCLSTATE(); 1882 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 1883 NFSCLFLAGS_RECOVER | NFSCLFLAGS_RECVRINPROG); 1884 wakeup(&clp->nfsc_flags); 1885 nfsv4_unlock(&clp->nfsc_lock, 0); 1886 NFSUNLOCKCLSTATE(); 1887 return; 1888 } 1889 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 1890 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 1891 1892 /* 1893 * Mark requests already queued on the server, so that they don't 1894 * initiate another recovery cycle. Any requests already in the 1895 * queue that handle state information will have the old stale 1896 * clientid/stateid and will get a NFSERR_STALESTATEID or 1897 * NFSERR_STALECLIENTID reply from the server. This will be 1898 * translated to NFSERR_STALEDONTRECOVER when R_DONTRECOVER is set. 1899 */ 1900 s = splsoftclock(); 1901 NFSLOCKREQ(); 1902 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 1903 if (rep->r_nmp == nmp) 1904 rep->r_flags |= R_DONTRECOVER; 1905 } 1906 NFSUNLOCKREQ(); 1907 splx(s); 1908 1909 /* 1910 * Now, mark all delegations "need reclaim". 1911 */ 1912 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 1913 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 1914 1915 TAILQ_INIT(&extra_deleg); 1916 LIST_INIT(&extra_open); 1917 /* 1918 * Now traverse the state lists, doing Open and Lock Reclaims. 1919 */ 1920 tcred = newnfs_getcred(); 1921 owp = LIST_FIRST(&clp->nfsc_owner); 1922 while (owp != NULL) { 1923 nowp = LIST_NEXT(owp, nfsow_list); 1924 owp->nfsow_seqid = 0; 1925 op = LIST_FIRST(&owp->nfsow_open); 1926 while (op != NULL) { 1927 nop = LIST_NEXT(op, nfso_list); 1928 if (error != NFSERR_NOGRACE) { 1929 /* Search for a delegation to reclaim with the open */ 1930 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1931 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1932 continue; 1933 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 1934 mode = NFSV4OPEN_ACCESSWRITE; 1935 delegtype = NFSV4OPEN_DELEGATEWRITE; 1936 } else { 1937 mode = NFSV4OPEN_ACCESSREAD; 1938 delegtype = NFSV4OPEN_DELEGATEREAD; 1939 } 1940 if ((op->nfso_mode & mode) == mode && 1941 op->nfso_fhlen == dp->nfsdl_fhlen && 1942 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 1943 break; 1944 } 1945 ndp = dp; 1946 if (dp == NULL) 1947 delegtype = NFSV4OPEN_DELEGATENONE; 1948 newnfs_copycred(&op->nfso_cred, tcred); 1949 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 1950 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 1951 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 1952 tcred, p); 1953 if (!error) { 1954 /* Handle any replied delegation */ 1955 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 1956 || NFSMNT_RDONLY(nmp->nm_mountp))) { 1957 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 1958 mode = NFSV4OPEN_ACCESSWRITE; 1959 else 1960 mode = NFSV4OPEN_ACCESSREAD; 1961 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1962 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1963 continue; 1964 if ((op->nfso_mode & mode) == mode && 1965 op->nfso_fhlen == dp->nfsdl_fhlen && 1966 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 1967 op->nfso_fhlen)) { 1968 dp->nfsdl_stateid = ndp->nfsdl_stateid; 1969 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 1970 dp->nfsdl_ace = ndp->nfsdl_ace; 1971 dp->nfsdl_change = ndp->nfsdl_change; 1972 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 1973 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 1974 dp->nfsdl_flags |= NFSCLDL_RECALL; 1975 FREE((caddr_t)ndp, M_NFSCLDELEG); 1976 ndp = NULL; 1977 break; 1978 } 1979 } 1980 } 1981 if (ndp != NULL) 1982 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 1983 1984 /* and reclaim all byte range locks */ 1985 lp = LIST_FIRST(&op->nfso_lock); 1986 while (lp != NULL) { 1987 nlp = LIST_NEXT(lp, nfsl_list); 1988 lp->nfsl_seqid = 0; 1989 firstlock = 1; 1990 lop = LIST_FIRST(&lp->nfsl_lock); 1991 while (lop != NULL) { 1992 nlop = LIST_NEXT(lop, nfslo_list); 1993 if (lop->nfslo_end == NFS64BITSSET) 1994 len = NFS64BITSSET; 1995 else 1996 len = lop->nfslo_end - lop->nfslo_first; 1997 if (error != NFSERR_NOGRACE) 1998 error = nfscl_trylock(nmp, NULL, 1999 op->nfso_fh, op->nfso_fhlen, lp, 2000 firstlock, 1, lop->nfslo_first, len, 2001 lop->nfslo_type, tcred, p); 2002 if (error != 0) 2003 nfscl_freelock(lop, 0); 2004 else 2005 firstlock = 0; 2006 lop = nlop; 2007 } 2008 /* If no locks, but a lockowner, just delete it. */ 2009 if (LIST_EMPTY(&lp->nfsl_lock)) 2010 nfscl_freelockowner(lp, 0); 2011 lp = nlp; 2012 } 2013 } else { 2014 nfscl_freeopen(op, 0); 2015 } 2016 } 2017 op = nop; 2018 } 2019 owp = nowp; 2020 } 2021 2022 /* 2023 * Now, try and get any delegations not yet reclaimed by cobbling 2024 * to-gether an appropriate open. 2025 */ 2026 nowp = NULL; 2027 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2028 while (dp != NULL) { 2029 ndp = TAILQ_NEXT(dp, nfsdl_list); 2030 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2031 if (nowp == NULL) { 2032 MALLOC(nowp, struct nfsclowner *, 2033 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2034 /* 2035 * Name must be as long an largest possible 2036 * NFSV4CL_LOCKNAMELEN. 12 for now. 2037 */ 2038 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2039 NFSV4CL_LOCKNAMELEN); 2040 LIST_INIT(&nowp->nfsow_open); 2041 nowp->nfsow_clp = clp; 2042 nowp->nfsow_seqid = 0; 2043 nowp->nfsow_defunct = 0; 2044 nfscl_lockinit(&nowp->nfsow_rwlock); 2045 } 2046 nop = NULL; 2047 if (error != NFSERR_NOGRACE) { 2048 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 2049 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2050 nop->nfso_own = nowp; 2051 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2052 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2053 delegtype = NFSV4OPEN_DELEGATEWRITE; 2054 } else { 2055 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2056 delegtype = NFSV4OPEN_DELEGATEREAD; 2057 } 2058 nop->nfso_opencnt = 0; 2059 nop->nfso_posixlock = 1; 2060 nop->nfso_fhlen = dp->nfsdl_fhlen; 2061 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2062 LIST_INIT(&nop->nfso_lock); 2063 nop->nfso_stateid.seqid = 0; 2064 nop->nfso_stateid.other[0] = 0; 2065 nop->nfso_stateid.other[1] = 0; 2066 nop->nfso_stateid.other[2] = 0; 2067 newnfs_copycred(&dp->nfsdl_cred, tcred); 2068 newnfs_copyincred(tcred, &nop->nfso_cred); 2069 tdp = NULL; 2070 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2071 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2072 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2073 delegtype, tcred, p); 2074 if (tdp != NULL) { 2075 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2076 mode = NFSV4OPEN_ACCESSWRITE; 2077 else 2078 mode = NFSV4OPEN_ACCESSREAD; 2079 if ((nop->nfso_mode & mode) == mode && 2080 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2081 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2082 nop->nfso_fhlen)) { 2083 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2084 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2085 dp->nfsdl_ace = tdp->nfsdl_ace; 2086 dp->nfsdl_change = tdp->nfsdl_change; 2087 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2088 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2089 dp->nfsdl_flags |= NFSCLDL_RECALL; 2090 FREE((caddr_t)tdp, M_NFSCLDELEG); 2091 } else { 2092 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2093 } 2094 } 2095 } 2096 if (error) { 2097 if (nop != NULL) 2098 FREE((caddr_t)nop, M_NFSCLOPEN); 2099 /* 2100 * Couldn't reclaim it, so throw the state 2101 * away. Ouch!! 2102 */ 2103 nfscl_cleandeleg(dp); 2104 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2105 } else { 2106 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2107 } 2108 } 2109 dp = ndp; 2110 } 2111 2112 /* 2113 * Now, get rid of extra Opens and Delegations. 2114 */ 2115 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2116 do { 2117 newnfs_copycred(&op->nfso_cred, tcred); 2118 error = nfscl_tryclose(op, tcred, nmp, p); 2119 if (error == NFSERR_GRACE) 2120 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2121 } while (error == NFSERR_GRACE); 2122 LIST_REMOVE(op, nfso_list); 2123 FREE((caddr_t)op, M_NFSCLOPEN); 2124 } 2125 if (nowp != NULL) 2126 FREE((caddr_t)nowp, M_NFSCLOWNER); 2127 2128 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2129 do { 2130 newnfs_copycred(&dp->nfsdl_cred, tcred); 2131 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2132 if (error == NFSERR_GRACE) 2133 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2134 } while (error == NFSERR_GRACE); 2135 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2136 FREE((caddr_t)dp, M_NFSCLDELEG); 2137 } 2138 2139 NFSLOCKCLSTATE(); 2140 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2141 wakeup(&clp->nfsc_flags); 2142 nfsv4_unlock(&clp->nfsc_lock, 0); 2143 NFSUNLOCKCLSTATE(); 2144 NFSFREECRED(tcred); 2145 } 2146 2147 /* 2148 * This function is called when a server replies with NFSERR_EXPIRED. 2149 * It deletes all state for the client and does a fresh SetClientId/confirm. 2150 * XXX Someday it should post a signal to the process(es) that hold the 2151 * state, so they know that lock state has been lost. 2152 */ 2153 APPLESTATIC int 2154 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2155 { 2156 struct nfsmount *nmp; 2157 struct ucred *cred; 2158 int igotlock = 0, error, trycnt; 2159 2160 /* 2161 * If the clientid has gone away or a new SetClientid has already 2162 * been done, just return ok. 2163 */ 2164 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2165 return (0); 2166 2167 /* 2168 * First, lock the client structure, so everyone else will 2169 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2170 * that only one thread does the work. 2171 */ 2172 NFSLOCKCLSTATE(); 2173 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2174 do { 2175 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2176 NFSCLSTATEMUTEXPTR, NULL); 2177 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2178 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2179 if (igotlock) 2180 nfsv4_unlock(&clp->nfsc_lock, 0); 2181 NFSUNLOCKCLSTATE(); 2182 return (0); 2183 } 2184 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2185 NFSUNLOCKCLSTATE(); 2186 2187 nmp = clp->nfsc_nmp; 2188 if (nmp == NULL) 2189 panic("nfscl expired"); 2190 cred = newnfs_getcred(); 2191 trycnt = 5; 2192 do { 2193 error = nfsrpc_setclient(nmp, clp, cred, p); 2194 } while ((error == NFSERR_STALECLIENTID || 2195 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2196 if (error) { 2197 /* 2198 * Clear out any state. 2199 */ 2200 nfscl_cleanclient(clp); 2201 NFSLOCKCLSTATE(); 2202 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 2203 NFSCLFLAGS_RECOVER); 2204 } else { 2205 /* 2206 * Expire the state for the client. 2207 */ 2208 nfscl_expireclient(clp, nmp, cred, p); 2209 NFSLOCKCLSTATE(); 2210 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2211 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2212 } 2213 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2214 wakeup(&clp->nfsc_flags); 2215 nfsv4_unlock(&clp->nfsc_lock, 0); 2216 NFSUNLOCKCLSTATE(); 2217 NFSFREECRED(cred); 2218 return (error); 2219 } 2220 2221 /* 2222 * This function inserts a lock in the list after insert_lop. 2223 */ 2224 static void 2225 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2226 struct nfscllock *insert_lop, int local) 2227 { 2228 2229 if ((struct nfscllockowner *)insert_lop == lp) 2230 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2231 else 2232 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2233 if (local) 2234 newnfsstats.cllocallocks++; 2235 else 2236 newnfsstats.cllocks++; 2237 } 2238 2239 /* 2240 * This function updates the locking for a lock owner and given file. It 2241 * maintains a list of lock ranges ordered on increasing file offset that 2242 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2243 * It always adds new_lop to the list and sometimes uses the one pointed 2244 * at by other_lopp. 2245 * Returns 1 if the locks were modified, 0 otherwise. 2246 */ 2247 static int 2248 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2249 struct nfscllock **other_lopp, int local) 2250 { 2251 struct nfscllock *new_lop = *new_lopp; 2252 struct nfscllock *lop, *tlop, *ilop; 2253 struct nfscllock *other_lop; 2254 int unlock = 0, modified = 0; 2255 u_int64_t tmp; 2256 2257 /* 2258 * Work down the list until the lock is merged. 2259 */ 2260 if (new_lop->nfslo_type == F_UNLCK) 2261 unlock = 1; 2262 ilop = (struct nfscllock *)lp; 2263 lop = LIST_FIRST(&lp->nfsl_lock); 2264 while (lop != NULL) { 2265 /* 2266 * Only check locks for this file that aren't before the start of 2267 * new lock's range. 2268 */ 2269 if (lop->nfslo_end >= new_lop->nfslo_first) { 2270 if (new_lop->nfslo_end < lop->nfslo_first) { 2271 /* 2272 * If the new lock ends before the start of the 2273 * current lock's range, no merge, just insert 2274 * the new lock. 2275 */ 2276 break; 2277 } 2278 if (new_lop->nfslo_type == lop->nfslo_type || 2279 (new_lop->nfslo_first <= lop->nfslo_first && 2280 new_lop->nfslo_end >= lop->nfslo_end)) { 2281 /* 2282 * This lock can be absorbed by the new lock/unlock. 2283 * This happens when it covers the entire range 2284 * of the old lock or is contiguous 2285 * with the old lock and is of the same type or an 2286 * unlock. 2287 */ 2288 if (new_lop->nfslo_type != lop->nfslo_type || 2289 new_lop->nfslo_first != lop->nfslo_first || 2290 new_lop->nfslo_end != lop->nfslo_end) 2291 modified = 1; 2292 if (lop->nfslo_first < new_lop->nfslo_first) 2293 new_lop->nfslo_first = lop->nfslo_first; 2294 if (lop->nfslo_end > new_lop->nfslo_end) 2295 new_lop->nfslo_end = lop->nfslo_end; 2296 tlop = lop; 2297 lop = LIST_NEXT(lop, nfslo_list); 2298 nfscl_freelock(tlop, local); 2299 continue; 2300 } 2301 2302 /* 2303 * All these cases are for contiguous locks that are not the 2304 * same type, so they can't be merged. 2305 */ 2306 if (new_lop->nfslo_first <= lop->nfslo_first) { 2307 /* 2308 * This case is where the new lock overlaps with the 2309 * first part of the old lock. Move the start of the 2310 * old lock to just past the end of the new lock. The 2311 * new lock will be inserted in front of the old, since 2312 * ilop hasn't been updated. (We are done now.) 2313 */ 2314 if (lop->nfslo_first != new_lop->nfslo_end) { 2315 lop->nfslo_first = new_lop->nfslo_end; 2316 modified = 1; 2317 } 2318 break; 2319 } 2320 if (new_lop->nfslo_end >= lop->nfslo_end) { 2321 /* 2322 * This case is where the new lock overlaps with the 2323 * end of the old lock's range. Move the old lock's 2324 * end to just before the new lock's first and insert 2325 * the new lock after the old lock. 2326 * Might not be done yet, since the new lock could 2327 * overlap further locks with higher ranges. 2328 */ 2329 if (lop->nfslo_end != new_lop->nfslo_first) { 2330 lop->nfslo_end = new_lop->nfslo_first; 2331 modified = 1; 2332 } 2333 ilop = lop; 2334 lop = LIST_NEXT(lop, nfslo_list); 2335 continue; 2336 } 2337 /* 2338 * The final case is where the new lock's range is in the 2339 * middle of the current lock's and splits the current lock 2340 * up. Use *other_lopp to handle the second part of the 2341 * split old lock range. (We are done now.) 2342 * For unlock, we use new_lop as other_lop and tmp, since 2343 * other_lop and new_lop are the same for this case. 2344 * We noted the unlock case above, so we don't need 2345 * new_lop->nfslo_type any longer. 2346 */ 2347 tmp = new_lop->nfslo_first; 2348 if (unlock) { 2349 other_lop = new_lop; 2350 *new_lopp = NULL; 2351 } else { 2352 other_lop = *other_lopp; 2353 *other_lopp = NULL; 2354 } 2355 other_lop->nfslo_first = new_lop->nfslo_end; 2356 other_lop->nfslo_end = lop->nfslo_end; 2357 other_lop->nfslo_type = lop->nfslo_type; 2358 lop->nfslo_end = tmp; 2359 nfscl_insertlock(lp, other_lop, lop, local); 2360 ilop = lop; 2361 modified = 1; 2362 break; 2363 } 2364 ilop = lop; 2365 lop = LIST_NEXT(lop, nfslo_list); 2366 if (lop == NULL) 2367 break; 2368 } 2369 2370 /* 2371 * Insert the new lock in the list at the appropriate place. 2372 */ 2373 if (!unlock) { 2374 nfscl_insertlock(lp, new_lop, ilop, local); 2375 *new_lopp = NULL; 2376 modified = 1; 2377 } 2378 return (modified); 2379 } 2380 2381 /* 2382 * This function must be run as a kernel thread. 2383 * It does Renew Ops and recovery, when required. 2384 */ 2385 APPLESTATIC void 2386 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2387 { 2388 struct nfsclowner *owp, *nowp; 2389 struct nfsclopen *op; 2390 struct nfscllockowner *lp, *nlp; 2391 struct nfscldeleghead dh; 2392 struct nfscldeleg *dp, *ndp; 2393 struct ucred *cred; 2394 u_int32_t clidrev; 2395 int error, cbpathdown, islept, igotlock, ret, clearok; 2396 uint32_t recover_done_time = 0; 2397 struct timespec mytime; 2398 static time_t prevsec = 0; 2399 struct nfscllockownerfh *lfhp, *nlfhp; 2400 struct nfscllockownerfhhead lfh; 2401 2402 cred = newnfs_getcred(); 2403 NFSLOCKCLSTATE(); 2404 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2405 NFSUNLOCKCLSTATE(); 2406 for(;;) { 2407 newnfs_setroot(cred); 2408 cbpathdown = 0; 2409 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2410 /* 2411 * Only allow one recover within 1/2 of the lease 2412 * duration (nfsc_renew). 2413 */ 2414 if (recover_done_time < NFSD_MONOSEC) { 2415 recover_done_time = NFSD_MONOSEC + 2416 clp->nfsc_renew; 2417 nfscl_recover(clp, cred, p); 2418 } else { 2419 NFSLOCKCLSTATE(); 2420 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2421 NFSUNLOCKCLSTATE(); 2422 } 2423 } 2424 if (clp->nfsc_expire <= NFSD_MONOSEC && 2425 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2426 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2427 clidrev = clp->nfsc_clientidrev; 2428 error = nfsrpc_renew(clp, cred, p); 2429 if (error == NFSERR_CBPATHDOWN) 2430 cbpathdown = 1; 2431 else if (error == NFSERR_STALECLIENTID) { 2432 NFSLOCKCLSTATE(); 2433 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2434 NFSUNLOCKCLSTATE(); 2435 } else if (error == NFSERR_EXPIRED) 2436 (void) nfscl_hasexpired(clp, clidrev, p); 2437 } 2438 2439 TAILQ_INIT(&dh); 2440 NFSLOCKCLSTATE(); 2441 if (cbpathdown) 2442 /* It's a Total Recall! */ 2443 nfscl_totalrecall(clp); 2444 2445 /* 2446 * Now, handle defunct owners. 2447 */ 2448 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2449 if (LIST_EMPTY(&owp->nfsow_open)) { 2450 if (owp->nfsow_defunct != 0) 2451 nfscl_freeopenowner(owp, 0); 2452 } 2453 } 2454 2455 /* 2456 * Do the recall on any delegations. To avoid trouble, always 2457 * come back up here after having slept. 2458 */ 2459 igotlock = 0; 2460 tryagain: 2461 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2462 while (dp != NULL) { 2463 ndp = TAILQ_NEXT(dp, nfsdl_list); 2464 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2465 /* 2466 * Wait for outstanding I/O ops to be done. 2467 */ 2468 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2469 if (igotlock) { 2470 nfsv4_unlock(&clp->nfsc_lock, 0); 2471 igotlock = 0; 2472 } 2473 dp->nfsdl_rwlock.nfslock_lock |= 2474 NFSV4LOCK_WANTED; 2475 (void) nfsmsleep(&dp->nfsdl_rwlock, 2476 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2477 NULL); 2478 goto tryagain; 2479 } 2480 while (!igotlock) { 2481 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2482 &islept, NFSCLSTATEMUTEXPTR, NULL); 2483 if (islept) 2484 goto tryagain; 2485 } 2486 NFSUNLOCKCLSTATE(); 2487 newnfs_copycred(&dp->nfsdl_cred, cred); 2488 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2489 NULL, cred, p, 1); 2490 if (!ret) { 2491 nfscl_cleandeleg(dp); 2492 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2493 nfsdl_list); 2494 LIST_REMOVE(dp, nfsdl_hash); 2495 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2496 nfscl_delegcnt--; 2497 newnfsstats.cldelegates--; 2498 } 2499 NFSLOCKCLSTATE(); 2500 } 2501 dp = ndp; 2502 } 2503 2504 /* 2505 * Clear out old delegations, if we are above the high water 2506 * mark. Only clear out ones with no state related to them. 2507 * The tailq list is in LRU order. 2508 */ 2509 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2510 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2511 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2512 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2513 dp->nfsdl_rwlock.nfslock_lock == 0 && 2514 dp->nfsdl_timestamp < NFSD_MONOSEC && 2515 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2516 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2517 clearok = 1; 2518 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2519 op = LIST_FIRST(&owp->nfsow_open); 2520 if (op != NULL) { 2521 clearok = 0; 2522 break; 2523 } 2524 } 2525 if (clearok) { 2526 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2527 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2528 clearok = 0; 2529 break; 2530 } 2531 } 2532 } 2533 if (clearok) { 2534 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2535 LIST_REMOVE(dp, nfsdl_hash); 2536 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2537 nfscl_delegcnt--; 2538 newnfsstats.cldelegates--; 2539 } 2540 } 2541 dp = ndp; 2542 } 2543 if (igotlock) 2544 nfsv4_unlock(&clp->nfsc_lock, 0); 2545 NFSUNLOCKCLSTATE(); 2546 2547 /* 2548 * Delegreturn any delegations cleaned out or recalled. 2549 */ 2550 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2551 newnfs_copycred(&dp->nfsdl_cred, cred); 2552 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2553 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2554 FREE((caddr_t)dp, M_NFSCLDELEG); 2555 } 2556 2557 SLIST_INIT(&lfh); 2558 /* 2559 * Call nfscl_cleanupkext() once per second to check for 2560 * open/lock owners where the process has exited. 2561 */ 2562 NFSGETNANOTIME(&mytime); 2563 if (prevsec != mytime.tv_sec) { 2564 prevsec = mytime.tv_sec; 2565 nfscl_cleanupkext(clp, &lfh); 2566 } 2567 2568 /* 2569 * Do a ReleaseLockOwner for all lock owners where the 2570 * associated process no longer exists, as found by 2571 * nfscl_cleanupkext(). 2572 */ 2573 newnfs_setroot(cred); 2574 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2575 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2576 nlp) { 2577 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2578 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2579 p); 2580 nfscl_freelockowner(lp, 0); 2581 } 2582 free(lfhp, M_TEMP); 2583 } 2584 SLIST_INIT(&lfh); 2585 2586 NFSLOCKCLSTATE(); 2587 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2588 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2589 hz); 2590 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2591 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2592 NFSUNLOCKCLSTATE(); 2593 NFSFREECRED(cred); 2594 wakeup((caddr_t)clp); 2595 return; 2596 } 2597 NFSUNLOCKCLSTATE(); 2598 } 2599 } 2600 2601 /* 2602 * Initiate state recovery. Called when NFSERR_STALECLIENTID or 2603 * NFSERR_STALESTATEID is received. 2604 */ 2605 APPLESTATIC void 2606 nfscl_initiate_recovery(struct nfsclclient *clp) 2607 { 2608 2609 if (clp == NULL) 2610 return; 2611 NFSLOCKCLSTATE(); 2612 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2613 NFSUNLOCKCLSTATE(); 2614 wakeup((caddr_t)clp); 2615 } 2616 2617 /* 2618 * Dump out the state stuff for debugging. 2619 */ 2620 APPLESTATIC void 2621 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2622 int lockowner, int locks) 2623 { 2624 struct nfsclclient *clp; 2625 struct nfsclowner *owp; 2626 struct nfsclopen *op; 2627 struct nfscllockowner *lp; 2628 struct nfscllock *lop; 2629 struct nfscldeleg *dp; 2630 2631 clp = nmp->nm_clp; 2632 if (clp == NULL) { 2633 printf("nfscl dumpstate NULL clp\n"); 2634 return; 2635 } 2636 NFSLOCKCLSTATE(); 2637 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2638 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2639 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2640 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2641 owp->nfsow_owner[0], owp->nfsow_owner[1], 2642 owp->nfsow_owner[2], owp->nfsow_owner[3], 2643 owp->nfsow_seqid); 2644 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2645 if (opens) 2646 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2647 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2648 op->nfso_stateid.other[2], op->nfso_opencnt, 2649 op->nfso_fh[12]); 2650 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2651 if (lockowner) 2652 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2653 lp->nfsl_owner[0], lp->nfsl_owner[1], 2654 lp->nfsl_owner[2], lp->nfsl_owner[3], 2655 lp->nfsl_seqid, 2656 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2657 lp->nfsl_stateid.other[2]); 2658 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2659 if (locks) 2660 #ifdef __FreeBSD__ 2661 printf("lck typ=%d fst=%ju end=%ju\n", 2662 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2663 (intmax_t)lop->nfslo_end); 2664 #else 2665 printf("lck typ=%d fst=%qd end=%qd\n", 2666 lop->nfslo_type, lop->nfslo_first, 2667 lop->nfslo_end); 2668 #endif 2669 } 2670 } 2671 } 2672 } 2673 } 2674 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2675 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2676 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2677 owp->nfsow_owner[0], owp->nfsow_owner[1], 2678 owp->nfsow_owner[2], owp->nfsow_owner[3], 2679 owp->nfsow_seqid); 2680 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2681 if (opens) 2682 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2683 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2684 op->nfso_stateid.other[2], op->nfso_opencnt, 2685 op->nfso_fh[12]); 2686 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2687 if (lockowner) 2688 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2689 lp->nfsl_owner[0], lp->nfsl_owner[1], 2690 lp->nfsl_owner[2], lp->nfsl_owner[3], 2691 lp->nfsl_seqid, 2692 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2693 lp->nfsl_stateid.other[2]); 2694 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2695 if (locks) 2696 #ifdef __FreeBSD__ 2697 printf("lck typ=%d fst=%ju end=%ju\n", 2698 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2699 (intmax_t)lop->nfslo_end); 2700 #else 2701 printf("lck typ=%d fst=%qd end=%qd\n", 2702 lop->nfslo_type, lop->nfslo_first, 2703 lop->nfslo_end); 2704 #endif 2705 } 2706 } 2707 } 2708 } 2709 NFSUNLOCKCLSTATE(); 2710 } 2711 2712 /* 2713 * Check for duplicate open owners and opens. 2714 * (Only used as a diagnostic aid.) 2715 */ 2716 APPLESTATIC void 2717 nfscl_dupopen(vnode_t vp, int dupopens) 2718 { 2719 struct nfsclclient *clp; 2720 struct nfsclowner *owp, *owp2; 2721 struct nfsclopen *op, *op2; 2722 struct nfsfh *nfhp; 2723 2724 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2725 if (clp == NULL) { 2726 printf("nfscl dupopen NULL clp\n"); 2727 return; 2728 } 2729 nfhp = VTONFS(vp)->n_fhp; 2730 NFSLOCKCLSTATE(); 2731 2732 /* 2733 * First, search for duplicate owners. 2734 * These should never happen! 2735 */ 2736 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2737 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2738 if (owp != owp2 && 2739 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2740 NFSV4CL_LOCKNAMELEN)) { 2741 NFSUNLOCKCLSTATE(); 2742 printf("DUP OWNER\n"); 2743 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2744 return; 2745 } 2746 } 2747 } 2748 2749 /* 2750 * Now, search for duplicate stateids. 2751 * These shouldn't happen, either. 2752 */ 2753 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2754 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2755 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2756 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2757 if (op != op2 && 2758 (op->nfso_stateid.other[0] != 0 || 2759 op->nfso_stateid.other[1] != 0 || 2760 op->nfso_stateid.other[2] != 0) && 2761 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 2762 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 2763 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 2764 NFSUNLOCKCLSTATE(); 2765 printf("DUP STATEID\n"); 2766 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 2767 0); 2768 return; 2769 } 2770 } 2771 } 2772 } 2773 } 2774 2775 /* 2776 * Now search for duplicate opens. 2777 * Duplicate opens for the same owner 2778 * should never occur. Other duplicates are 2779 * possible and are checked for if "dupopens" 2780 * is true. 2781 */ 2782 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2783 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2784 if (nfhp->nfh_len == op2->nfso_fhlen && 2785 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 2786 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2787 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2788 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 2789 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 2790 (!NFSBCMP(op->nfso_own->nfsow_owner, 2791 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 2792 dupopens)) { 2793 if (!NFSBCMP(op->nfso_own->nfsow_owner, 2794 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 2795 NFSUNLOCKCLSTATE(); 2796 printf("BADDUP OPEN\n"); 2797 } else { 2798 NFSUNLOCKCLSTATE(); 2799 printf("DUP OPEN\n"); 2800 } 2801 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 2802 0, 0); 2803 return; 2804 } 2805 } 2806 } 2807 } 2808 } 2809 } 2810 NFSUNLOCKCLSTATE(); 2811 } 2812 2813 /* 2814 * During close, find an open that needs to be dereferenced and 2815 * dereference it. If there are no more opens for this file, 2816 * log a message to that effect. 2817 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 2818 * on the file's vnode. 2819 * This is the safe way, since it is difficult to identify 2820 * which open the close is for and I/O can be performed after the 2821 * close(2) system call when a file is mmap'd. 2822 * If it returns 0 for success, there will be a referenced 2823 * clp returned via clpp. 2824 */ 2825 APPLESTATIC int 2826 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 2827 { 2828 struct nfsclclient *clp; 2829 struct nfsclowner *owp; 2830 struct nfsclopen *op; 2831 struct nfscldeleg *dp; 2832 struct nfsfh *nfhp; 2833 int error, notdecr; 2834 2835 error = nfscl_getcl(vp, NULL, NULL, &clp); 2836 if (error) 2837 return (error); 2838 *clpp = clp; 2839 2840 nfhp = VTONFS(vp)->n_fhp; 2841 notdecr = 1; 2842 NFSLOCKCLSTATE(); 2843 /* 2844 * First, look for one under a delegation that was locally issued 2845 * and just decrement the opencnt for it. Since all my Opens against 2846 * the server are DENY_NONE, I don't see a problem with hanging 2847 * onto them. (It is much easier to use one of the extant Opens 2848 * that I already have on the server when a Delegation is recalled 2849 * than to do fresh Opens.) Someday, I might need to rethink this, but. 2850 */ 2851 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 2852 if (dp != NULL) { 2853 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2854 op = LIST_FIRST(&owp->nfsow_open); 2855 if (op != NULL) { 2856 /* 2857 * Since a delegation is for a file, there 2858 * should never be more than one open for 2859 * each openowner. 2860 */ 2861 if (LIST_NEXT(op, nfso_list) != NULL) 2862 panic("nfscdeleg opens"); 2863 if (notdecr && op->nfso_opencnt > 0) { 2864 notdecr = 0; 2865 op->nfso_opencnt--; 2866 break; 2867 } 2868 } 2869 } 2870 } 2871 2872 /* Now process the opens against the server. */ 2873 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2874 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2875 if (op->nfso_fhlen == nfhp->nfh_len && 2876 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 2877 nfhp->nfh_len)) { 2878 /* Found an open, decrement cnt if possible */ 2879 if (notdecr && op->nfso_opencnt > 0) { 2880 notdecr = 0; 2881 op->nfso_opencnt--; 2882 } 2883 /* 2884 * There are more opens, so just return. 2885 */ 2886 if (op->nfso_opencnt > 0) { 2887 NFSUNLOCKCLSTATE(); 2888 return (0); 2889 } 2890 } 2891 } 2892 } 2893 NFSUNLOCKCLSTATE(); 2894 if (notdecr) 2895 printf("nfscl: never fnd open\n"); 2896 return (0); 2897 } 2898 2899 APPLESTATIC int 2900 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 2901 { 2902 struct nfsclclient *clp; 2903 struct nfsclowner *owp, *nowp; 2904 struct nfsclopen *op; 2905 struct nfscldeleg *dp; 2906 struct nfsfh *nfhp; 2907 int error; 2908 2909 error = nfscl_getcl(vp, NULL, NULL, &clp); 2910 if (error) 2911 return (error); 2912 *clpp = clp; 2913 2914 nfhp = VTONFS(vp)->n_fhp; 2915 NFSLOCKCLSTATE(); 2916 /* 2917 * First get rid of the local Open structures, which should be no 2918 * longer in use. 2919 */ 2920 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 2921 if (dp != NULL) { 2922 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 2923 op = LIST_FIRST(&owp->nfsow_open); 2924 if (op != NULL) { 2925 KASSERT((op->nfso_opencnt == 0), 2926 ("nfscl: bad open cnt on deleg")); 2927 nfscl_freeopen(op, 1); 2928 } 2929 nfscl_freeopenowner(owp, 1); 2930 } 2931 } 2932 2933 /* Now process the opens against the server. */ 2934 lookformore: 2935 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2936 op = LIST_FIRST(&owp->nfsow_open); 2937 while (op != NULL) { 2938 if (op->nfso_fhlen == nfhp->nfh_len && 2939 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 2940 nfhp->nfh_len)) { 2941 /* Found an open, close it. */ 2942 KASSERT((op->nfso_opencnt == 0), 2943 ("nfscl: bad open cnt on server")); 2944 NFSUNLOCKCLSTATE(); 2945 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 2946 p); 2947 NFSLOCKCLSTATE(); 2948 goto lookformore; 2949 } 2950 op = LIST_NEXT(op, nfso_list); 2951 } 2952 } 2953 NFSUNLOCKCLSTATE(); 2954 return (0); 2955 } 2956 2957 /* 2958 * Return all delegations on this client. 2959 * (Must be called with client sleep lock.) 2960 */ 2961 static void 2962 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 2963 { 2964 struct nfscldeleg *dp, *ndp; 2965 struct ucred *cred; 2966 2967 cred = newnfs_getcred(); 2968 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 2969 nfscl_cleandeleg(dp); 2970 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2971 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2972 } 2973 NFSFREECRED(cred); 2974 } 2975 2976 /* 2977 * Do a callback RPC. 2978 */ 2979 APPLESTATIC void 2980 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 2981 { 2982 int i, op; 2983 u_int32_t *tl; 2984 struct nfsclclient *clp; 2985 struct nfscldeleg *dp = NULL; 2986 int numops, taglen = -1, error = 0, trunc, ret = 0; 2987 u_int32_t minorvers, retops = 0, *retopsp = NULL, *repp, cbident; 2988 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 2989 vnode_t vp = NULL; 2990 struct nfsnode *np; 2991 struct vattr va; 2992 struct nfsfh *nfhp; 2993 mount_t mp; 2994 nfsattrbit_t attrbits, rattrbits; 2995 nfsv4stateid_t stateid; 2996 2997 nfsrvd_rephead(nd); 2998 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2999 taglen = fxdr_unsigned(int, *tl); 3000 if (taglen < 0) { 3001 error = EBADRPC; 3002 goto nfsmout; 3003 } 3004 if (taglen <= NFSV4_SMALLSTR) 3005 tagstr = tag; 3006 else 3007 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3008 error = nfsrv_mtostr(nd, tagstr, taglen); 3009 if (error) { 3010 if (taglen > NFSV4_SMALLSTR) 3011 free(tagstr, M_TEMP); 3012 taglen = -1; 3013 goto nfsmout; 3014 } 3015 (void) nfsm_strtom(nd, tag, taglen); 3016 if (taglen > NFSV4_SMALLSTR) { 3017 free(tagstr, M_TEMP); 3018 } 3019 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3020 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3021 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3022 if (minorvers != NFSV4_MINORVERSION) 3023 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3024 cbident = fxdr_unsigned(u_int32_t, *tl++); 3025 if (nd->nd_repstat) 3026 numops = 0; 3027 else 3028 numops = fxdr_unsigned(int, *tl); 3029 /* 3030 * Loop around doing the sub ops. 3031 */ 3032 for (i = 0; i < numops; i++) { 3033 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3034 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3035 *repp++ = *tl; 3036 op = fxdr_unsigned(int, *tl); 3037 if (op < NFSV4OP_CBGETATTR || op > NFSV4OP_CBRECALL) { 3038 nd->nd_repstat = NFSERR_OPILLEGAL; 3039 *repp = nfscl_errmap(nd); 3040 retops++; 3041 break; 3042 } 3043 nd->nd_procnum = op; 3044 newnfsstats.cbrpccnt[nd->nd_procnum]++; 3045 switch (op) { 3046 case NFSV4OP_CBGETATTR: 3047 clp = NULL; 3048 error = nfsm_getfh(nd, &nfhp); 3049 if (!error) 3050 error = nfsrv_getattrbits(nd, &attrbits, 3051 NULL, NULL); 3052 if (!error) { 3053 mp = nfscl_getmnt(cbident); 3054 if (mp == NULL) 3055 error = NFSERR_SERVERFAULT; 3056 } 3057 if (!error) { 3058 dp = NULL; 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 NFSUNLOCKCLSTATE(); 3065 if (dp == NULL) 3066 error = NFSERR_SERVERFAULT; 3067 } 3068 if (!error) { 3069 ret = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3070 nfhp->nfh_len, p, &np); 3071 if (!ret) 3072 vp = NFSTOV(np); 3073 } 3074 if (nfhp != NULL) 3075 FREE((caddr_t)nfhp, M_NFSFH); 3076 if (!error) { 3077 NFSZERO_ATTRBIT(&rattrbits); 3078 if (NFSISSET_ATTRBIT(&attrbits, 3079 NFSATTRBIT_SIZE)) { 3080 if (!ret) 3081 va.va_size = np->n_size; 3082 else 3083 va.va_size = dp->nfsdl_size; 3084 NFSSETBIT_ATTRBIT(&rattrbits, 3085 NFSATTRBIT_SIZE); 3086 } 3087 if (NFSISSET_ATTRBIT(&attrbits, 3088 NFSATTRBIT_CHANGE)) { 3089 va.va_filerev = dp->nfsdl_change; 3090 if (ret || (np->n_flag & NDELEGMOD)) 3091 va.va_filerev++; 3092 NFSSETBIT_ATTRBIT(&rattrbits, 3093 NFSATTRBIT_CHANGE); 3094 } 3095 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3096 NULL, 0, &rattrbits, NULL, NULL, 0, 0, 0, 0, 3097 (uint64_t)0); 3098 if (!ret) 3099 vrele(vp); 3100 } 3101 break; 3102 case NFSV4OP_CBRECALL: 3103 clp = NULL; 3104 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3105 NFSX_UNSIGNED); 3106 stateid.seqid = *tl++; 3107 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3108 NFSX_STATEIDOTHER); 3109 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3110 trunc = fxdr_unsigned(int, *tl); 3111 error = nfsm_getfh(nd, &nfhp); 3112 if (!error) { 3113 mp = nfscl_getmnt(cbident); 3114 if (mp == NULL) 3115 error = NFSERR_SERVERFAULT; 3116 } 3117 if (!error) { 3118 NFSLOCKCLSTATE(); 3119 clp = nfscl_findcl(VFSTONFS(mp)); 3120 if (clp != NULL) { 3121 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3122 nfhp->nfh_len); 3123 if (dp != NULL && (dp->nfsdl_flags & 3124 NFSCLDL_DELEGRET) == 0) { 3125 dp->nfsdl_flags |= 3126 NFSCLDL_RECALL; 3127 wakeup((caddr_t)clp); 3128 } 3129 } else { 3130 error = NFSERR_SERVERFAULT; 3131 } 3132 NFSUNLOCKCLSTATE(); 3133 } 3134 if (nfhp != NULL) 3135 FREE((caddr_t)nfhp, M_NFSFH); 3136 break; 3137 }; 3138 if (error) { 3139 if (error == EBADRPC || error == NFSERR_BADXDR) { 3140 nd->nd_repstat = NFSERR_BADXDR; 3141 } else { 3142 nd->nd_repstat = error; 3143 } 3144 error = 0; 3145 } 3146 retops++; 3147 if (nd->nd_repstat) { 3148 *repp = nfscl_errmap(nd); 3149 break; 3150 } else 3151 *repp = 0; /* NFS4_OK */ 3152 } 3153 nfsmout: 3154 if (error) { 3155 if (error == EBADRPC || error == NFSERR_BADXDR) 3156 nd->nd_repstat = NFSERR_BADXDR; 3157 else 3158 printf("nfsv4 comperr1=%d\n", error); 3159 } 3160 if (taglen == -1) { 3161 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3162 *tl++ = 0; 3163 *tl = 0; 3164 } else { 3165 *retopsp = txdr_unsigned(retops); 3166 } 3167 *nd->nd_errp = nfscl_errmap(nd); 3168 } 3169 3170 /* 3171 * Generate the next cbident value. Basically just increment a static value 3172 * and then check that it isn't already in the list, if it has wrapped around. 3173 */ 3174 static u_int32_t 3175 nfscl_nextcbident(void) 3176 { 3177 struct nfsclclient *clp; 3178 int matched; 3179 static u_int32_t nextcbident = 0; 3180 static int haswrapped = 0; 3181 3182 nextcbident++; 3183 if (nextcbident == 0) 3184 haswrapped = 1; 3185 if (haswrapped) { 3186 /* 3187 * Search the clientid list for one already using this cbident. 3188 */ 3189 do { 3190 matched = 0; 3191 NFSLOCKCLSTATE(); 3192 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3193 if (clp->nfsc_cbident == nextcbident) { 3194 matched = 1; 3195 break; 3196 } 3197 } 3198 NFSUNLOCKCLSTATE(); 3199 if (matched == 1) 3200 nextcbident++; 3201 } while (matched); 3202 } 3203 return (nextcbident); 3204 } 3205 3206 /* 3207 * Get the mount point related to a given cbident. 3208 */ 3209 static mount_t 3210 nfscl_getmnt(u_int32_t cbident) 3211 { 3212 struct nfsclclient *clp; 3213 struct nfsmount *nmp; 3214 3215 NFSLOCKCLSTATE(); 3216 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3217 if (clp->nfsc_cbident == cbident) 3218 break; 3219 } 3220 if (clp == NULL) { 3221 NFSUNLOCKCLSTATE(); 3222 return (NULL); 3223 } 3224 nmp = clp->nfsc_nmp; 3225 NFSUNLOCKCLSTATE(); 3226 return (nmp->nm_mountp); 3227 } 3228 3229 /* 3230 * Search for a lock conflict locally on the client. A conflict occurs if 3231 * - not same owner and overlapping byte range and at least one of them is 3232 * a write lock or this is an unlock. 3233 */ 3234 static int 3235 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3236 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3237 struct nfscllock **lopp) 3238 { 3239 struct nfsclowner *owp; 3240 struct nfsclopen *op; 3241 int ret; 3242 3243 if (dp != NULL) { 3244 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3245 if (ret) 3246 return (ret); 3247 } 3248 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3249 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3250 if (op->nfso_fhlen == fhlen && 3251 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3252 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3253 own, lopp); 3254 if (ret) 3255 return (ret); 3256 } 3257 } 3258 } 3259 return (0); 3260 } 3261 3262 static int 3263 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3264 u_int8_t *own, struct nfscllock **lopp) 3265 { 3266 struct nfscllockowner *lp; 3267 struct nfscllock *lop; 3268 3269 LIST_FOREACH(lp, lhp, nfsl_list) { 3270 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3271 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3272 if (lop->nfslo_first >= nlop->nfslo_end) 3273 break; 3274 if (lop->nfslo_end <= nlop->nfslo_first) 3275 continue; 3276 if (lop->nfslo_type == F_WRLCK || 3277 nlop->nfslo_type == F_WRLCK || 3278 nlop->nfslo_type == F_UNLCK) { 3279 if (lopp != NULL) 3280 *lopp = lop; 3281 return (NFSERR_DENIED); 3282 } 3283 } 3284 } 3285 } 3286 return (0); 3287 } 3288 3289 /* 3290 * Check for a local conflicting lock. 3291 */ 3292 APPLESTATIC int 3293 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3294 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3295 { 3296 struct nfscllock *lop, nlck; 3297 struct nfscldeleg *dp; 3298 struct nfsnode *np; 3299 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3300 int error; 3301 3302 nlck.nfslo_type = fl->l_type; 3303 nlck.nfslo_first = off; 3304 if (len == NFS64BITSSET) { 3305 nlck.nfslo_end = NFS64BITSSET; 3306 } else { 3307 nlck.nfslo_end = off + len; 3308 if (nlck.nfslo_end <= nlck.nfslo_first) 3309 return (NFSERR_INVAL); 3310 } 3311 np = VTONFS(vp); 3312 nfscl_filllockowner(id, own, flags); 3313 NFSLOCKCLSTATE(); 3314 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3315 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3316 &nlck, own, dp, &lop); 3317 if (error != 0) { 3318 fl->l_whence = SEEK_SET; 3319 fl->l_start = lop->nfslo_first; 3320 if (lop->nfslo_end == NFS64BITSSET) 3321 fl->l_len = 0; 3322 else 3323 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3324 fl->l_pid = (pid_t)0; 3325 fl->l_type = lop->nfslo_type; 3326 error = -1; /* no RPC required */ 3327 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3328 fl->l_type == F_RDLCK)) { 3329 /* 3330 * The delegation ensures that there isn't a conflicting 3331 * lock on the server, so return -1 to indicate an RPC 3332 * isn't required. 3333 */ 3334 fl->l_type = F_UNLCK; 3335 error = -1; 3336 } 3337 NFSUNLOCKCLSTATE(); 3338 return (error); 3339 } 3340 3341 /* 3342 * Handle Recall of a delegation. 3343 * The clp must be exclusive locked when this is called. 3344 */ 3345 static int 3346 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3347 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3348 int called_from_renewthread) 3349 { 3350 struct nfsclowner *owp, *lowp, *nowp; 3351 struct nfsclopen *op, *lop; 3352 struct nfscllockowner *lp; 3353 struct nfscllock *lckp; 3354 struct nfsnode *np; 3355 int error = 0, ret, gotvp = 0; 3356 3357 if (vp == NULL) { 3358 /* 3359 * First, get a vnode for the file. This is needed to do RPCs. 3360 */ 3361 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3362 dp->nfsdl_fhlen, p, &np); 3363 if (ret) { 3364 /* 3365 * File isn't open, so nothing to move over to the 3366 * server. 3367 */ 3368 return (0); 3369 } 3370 vp = NFSTOV(np); 3371 gotvp = 1; 3372 } else { 3373 np = VTONFS(vp); 3374 } 3375 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3376 3377 /* 3378 * Ok, if it's a write delegation, flush data to the server, so 3379 * that close/open consistency is retained. 3380 */ 3381 ret = 0; 3382 NFSLOCKNODE(np); 3383 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3384 np->n_flag |= NDELEGRECALL; 3385 NFSUNLOCKNODE(np); 3386 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1, 3387 called_from_renewthread); 3388 NFSLOCKNODE(np); 3389 np->n_flag &= ~NDELEGRECALL; 3390 } 3391 NFSINVALATTRCACHE(np); 3392 NFSUNLOCKNODE(np); 3393 if (ret == EIO && called_from_renewthread != 0) { 3394 /* 3395 * If the flush failed with EIO for the renew thread, 3396 * return now, so that the dirty buffer will be flushed 3397 * later. 3398 */ 3399 if (gotvp != 0) 3400 vrele(vp); 3401 return (ret); 3402 } 3403 3404 /* 3405 * Now, for each openowner with opens issued locally, move them 3406 * over to state against the server. 3407 */ 3408 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3409 lop = LIST_FIRST(&lowp->nfsow_open); 3410 if (lop != NULL) { 3411 if (LIST_NEXT(lop, nfso_list) != NULL) 3412 panic("nfsdlg mult opens"); 3413 /* 3414 * Look for the same openowner against the server. 3415 */ 3416 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3417 if (!NFSBCMP(lowp->nfsow_owner, 3418 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3419 newnfs_copycred(&dp->nfsdl_cred, cred); 3420 ret = nfscl_moveopen(vp, clp, nmp, lop, 3421 owp, dp, cred, p); 3422 if (ret == NFSERR_STALECLIENTID || 3423 ret == NFSERR_STALEDONTRECOVER) { 3424 if (gotvp) 3425 vrele(vp); 3426 return (ret); 3427 } 3428 if (ret) { 3429 nfscl_freeopen(lop, 1); 3430 if (!error) 3431 error = ret; 3432 } 3433 break; 3434 } 3435 } 3436 3437 /* 3438 * If no openowner found, create one and get an open 3439 * for it. 3440 */ 3441 if (owp == NULL) { 3442 MALLOC(nowp, struct nfsclowner *, 3443 sizeof (struct nfsclowner), M_NFSCLOWNER, 3444 M_WAITOK); 3445 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3446 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3447 dp->nfsdl_fhlen, NULL); 3448 newnfs_copycred(&dp->nfsdl_cred, cred); 3449 ret = nfscl_moveopen(vp, clp, nmp, lop, 3450 owp, dp, cred, p); 3451 if (ret) { 3452 nfscl_freeopenowner(owp, 0); 3453 if (ret == NFSERR_STALECLIENTID || 3454 ret == NFSERR_STALEDONTRECOVER) { 3455 if (gotvp) 3456 vrele(vp); 3457 return (ret); 3458 } 3459 if (ret) { 3460 nfscl_freeopen(lop, 1); 3461 if (!error) 3462 error = ret; 3463 } 3464 } 3465 } 3466 } 3467 } 3468 3469 /* 3470 * Now, get byte range locks for any locks done locally. 3471 */ 3472 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3473 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 3474 newnfs_copycred(&dp->nfsdl_cred, cred); 3475 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 3476 if (ret == NFSERR_STALESTATEID || 3477 ret == NFSERR_STALEDONTRECOVER || 3478 ret == NFSERR_STALECLIENTID) { 3479 if (gotvp) 3480 vrele(vp); 3481 return (ret); 3482 } 3483 if (ret && !error) 3484 error = ret; 3485 } 3486 } 3487 if (gotvp) 3488 vrele(vp); 3489 return (error); 3490 } 3491 3492 /* 3493 * Move a locally issued open over to an owner on the state list. 3494 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 3495 * returns with it unlocked. 3496 */ 3497 static int 3498 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3499 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 3500 struct ucred *cred, NFSPROC_T *p) 3501 { 3502 struct nfsclopen *op, *nop; 3503 struct nfscldeleg *ndp; 3504 struct nfsnode *np; 3505 int error = 0, newone; 3506 3507 /* 3508 * First, look for an appropriate open, If found, just increment the 3509 * opencnt in it. 3510 */ 3511 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3512 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 3513 op->nfso_fhlen == lop->nfso_fhlen && 3514 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 3515 op->nfso_opencnt += lop->nfso_opencnt; 3516 nfscl_freeopen(lop, 1); 3517 return (0); 3518 } 3519 } 3520 3521 /* No appropriate open, so we have to do one against the server. */ 3522 np = VTONFS(vp); 3523 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 3524 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 3525 newone = 0; 3526 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 3527 lop->nfso_fh, lop->nfso_fhlen, &newone); 3528 ndp = dp; 3529 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 3530 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 3531 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 3532 if (error) { 3533 if (newone) 3534 nfscl_freeopen(op, 0); 3535 } else { 3536 if (newone) 3537 newnfs_copyincred(cred, &op->nfso_cred); 3538 op->nfso_mode |= lop->nfso_mode; 3539 op->nfso_opencnt += lop->nfso_opencnt; 3540 nfscl_freeopen(lop, 1); 3541 } 3542 if (nop != NULL) 3543 FREE((caddr_t)nop, M_NFSCLOPEN); 3544 if (ndp != NULL) { 3545 /* 3546 * What should I do with the returned delegation, since the 3547 * delegation is being recalled? For now, just printf and 3548 * through it away. 3549 */ 3550 printf("Moveopen returned deleg\n"); 3551 FREE((caddr_t)ndp, M_NFSCLDELEG); 3552 } 3553 return (error); 3554 } 3555 3556 /* 3557 * Recall all delegations on this client. 3558 */ 3559 static void 3560 nfscl_totalrecall(struct nfsclclient *clp) 3561 { 3562 struct nfscldeleg *dp; 3563 3564 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 3565 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 3566 dp->nfsdl_flags |= NFSCLDL_RECALL; 3567 } 3568 } 3569 3570 /* 3571 * Relock byte ranges. Called for delegation recall and state expiry. 3572 */ 3573 static int 3574 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3575 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 3576 NFSPROC_T *p) 3577 { 3578 struct nfscllockowner *nlp; 3579 struct nfsfh *nfhp; 3580 u_int64_t off, len; 3581 u_int32_t clidrev = 0; 3582 int error, newone, donelocally; 3583 3584 off = lop->nfslo_first; 3585 len = lop->nfslo_end - lop->nfslo_first; 3586 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 3587 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 3588 lp->nfsl_openowner, &nlp, &newone, &donelocally); 3589 if (error || donelocally) 3590 return (error); 3591 if (nmp->nm_clp != NULL) 3592 clidrev = nmp->nm_clp->nfsc_clientidrev; 3593 else 3594 clidrev = 0; 3595 nfhp = VTONFS(vp)->n_fhp; 3596 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 3597 nfhp->nfh_len, nlp, newone, 0, off, 3598 len, lop->nfslo_type, cred, p); 3599 if (error) 3600 nfscl_freelockowner(nlp, 0); 3601 return (error); 3602 } 3603 3604 /* 3605 * Called to re-open a file. Basically get a vnode for the file handle 3606 * and then call nfsrpc_openrpc() to do the rest. 3607 */ 3608 static int 3609 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 3610 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 3611 struct ucred *cred, NFSPROC_T *p) 3612 { 3613 struct nfsnode *np; 3614 vnode_t vp; 3615 int error; 3616 3617 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 3618 if (error) 3619 return (error); 3620 vp = NFSTOV(np); 3621 if (np->n_v4 != NULL) { 3622 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 3623 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 3624 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 3625 cred, p); 3626 } else { 3627 error = EINVAL; 3628 } 3629 vrele(vp); 3630 return (error); 3631 } 3632 3633 /* 3634 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 3635 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 3636 * fail. 3637 */ 3638 static int 3639 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 3640 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 3641 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 3642 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 3643 { 3644 int error; 3645 3646 do { 3647 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 3648 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 3649 0, 0); 3650 if (error == NFSERR_DELAY) 3651 (void) nfs_catnap(PZERO, error, "nfstryop"); 3652 } while (error == NFSERR_DELAY); 3653 if (error == EAUTH || error == EACCES) { 3654 /* Try again using system credentials */ 3655 newnfs_setroot(cred); 3656 do { 3657 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 3658 newfhlen, mode, op, name, namelen, ndpp, reclaim, 3659 delegtype, cred, p, 1, 0); 3660 if (error == NFSERR_DELAY) 3661 (void) nfs_catnap(PZERO, error, "nfstryop"); 3662 } while (error == NFSERR_DELAY); 3663 } 3664 return (error); 3665 } 3666 3667 /* 3668 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 3669 * NFSERR_DELAY. Also, retry with system credentials, if the provided 3670 * cred don't work. 3671 */ 3672 static int 3673 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 3674 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 3675 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 3676 { 3677 struct nfsrv_descript nfsd, *nd = &nfsd; 3678 int error; 3679 3680 do { 3681 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 3682 reclaim, off, len, type, cred, p, 0); 3683 if (!error && nd->nd_repstat == NFSERR_DELAY) 3684 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 3685 "nfstrylck"); 3686 } while (!error && nd->nd_repstat == NFSERR_DELAY); 3687 if (!error) 3688 error = nd->nd_repstat; 3689 if (error == EAUTH || error == EACCES) { 3690 /* Try again using root credentials */ 3691 newnfs_setroot(cred); 3692 do { 3693 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 3694 newone, reclaim, off, len, type, cred, p, 1); 3695 if (!error && nd->nd_repstat == NFSERR_DELAY) 3696 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 3697 "nfstrylck"); 3698 } while (!error && nd->nd_repstat == NFSERR_DELAY); 3699 if (!error) 3700 error = nd->nd_repstat; 3701 } 3702 return (error); 3703 } 3704 3705 /* 3706 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 3707 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 3708 * credentials fail. 3709 */ 3710 static int 3711 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 3712 struct nfsmount *nmp, NFSPROC_T *p) 3713 { 3714 int error; 3715 3716 do { 3717 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 3718 if (error == NFSERR_DELAY) 3719 (void) nfs_catnap(PZERO, error, "nfstrydp"); 3720 } while (error == NFSERR_DELAY); 3721 if (error == EAUTH || error == EACCES) { 3722 /* Try again using system credentials */ 3723 newnfs_setroot(cred); 3724 do { 3725 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 3726 if (error == NFSERR_DELAY) 3727 (void) nfs_catnap(PZERO, error, "nfstrydp"); 3728 } while (error == NFSERR_DELAY); 3729 } 3730 return (error); 3731 } 3732 3733 /* 3734 * Try a close against the server. Just call nfsrpc_closerpc(), 3735 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 3736 * credentials fail. 3737 */ 3738 APPLESTATIC int 3739 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 3740 struct nfsmount *nmp, NFSPROC_T *p) 3741 { 3742 struct nfsrv_descript nfsd, *nd = &nfsd; 3743 int error; 3744 3745 do { 3746 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 3747 if (error == NFSERR_DELAY) 3748 (void) nfs_catnap(PZERO, error, "nfstrycl"); 3749 } while (error == NFSERR_DELAY); 3750 if (error == EAUTH || error == EACCES) { 3751 /* Try again using system credentials */ 3752 newnfs_setroot(cred); 3753 do { 3754 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 3755 if (error == NFSERR_DELAY) 3756 (void) nfs_catnap(PZERO, error, "nfstrycl"); 3757 } while (error == NFSERR_DELAY); 3758 } 3759 return (error); 3760 } 3761 3762 /* 3763 * Decide if a delegation on a file permits close without flushing writes 3764 * to the server. This might be a big performance win in some environments. 3765 * (Not useful until the client does caching on local stable storage.) 3766 */ 3767 APPLESTATIC int 3768 nfscl_mustflush(vnode_t vp) 3769 { 3770 struct nfsclclient *clp; 3771 struct nfscldeleg *dp; 3772 struct nfsnode *np; 3773 struct nfsmount *nmp; 3774 3775 np = VTONFS(vp); 3776 nmp = VFSTONFS(vnode_mount(vp)); 3777 if (!NFSHASNFSV4(nmp)) 3778 return (1); 3779 NFSLOCKCLSTATE(); 3780 clp = nfscl_findcl(nmp); 3781 if (clp == NULL) { 3782 NFSUNLOCKCLSTATE(); 3783 return (1); 3784 } 3785 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3786 if (dp != NULL && (dp->nfsdl_flags & 3787 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 3788 NFSCLDL_WRITE && 3789 (dp->nfsdl_sizelimit >= np->n_size || 3790 !NFSHASSTRICT3530(nmp))) { 3791 NFSUNLOCKCLSTATE(); 3792 return (0); 3793 } 3794 NFSUNLOCKCLSTATE(); 3795 return (1); 3796 } 3797 3798 /* 3799 * See if a (write) delegation exists for this file. 3800 */ 3801 APPLESTATIC int 3802 nfscl_nodeleg(vnode_t vp, int writedeleg) 3803 { 3804 struct nfsclclient *clp; 3805 struct nfscldeleg *dp; 3806 struct nfsnode *np; 3807 struct nfsmount *nmp; 3808 3809 np = VTONFS(vp); 3810 nmp = VFSTONFS(vnode_mount(vp)); 3811 if (!NFSHASNFSV4(nmp)) 3812 return (1); 3813 NFSLOCKCLSTATE(); 3814 clp = nfscl_findcl(nmp); 3815 if (clp == NULL) { 3816 NFSUNLOCKCLSTATE(); 3817 return (1); 3818 } 3819 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3820 if (dp != NULL && 3821 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 3822 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 3823 NFSCLDL_WRITE)) { 3824 NFSUNLOCKCLSTATE(); 3825 return (0); 3826 } 3827 NFSUNLOCKCLSTATE(); 3828 return (1); 3829 } 3830 3831 /* 3832 * Look for an associated delegation that should be DelegReturned. 3833 */ 3834 APPLESTATIC int 3835 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 3836 { 3837 struct nfsclclient *clp; 3838 struct nfscldeleg *dp; 3839 struct nfsclowner *owp; 3840 struct nfscllockowner *lp; 3841 struct nfsmount *nmp; 3842 struct ucred *cred; 3843 struct nfsnode *np; 3844 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 3845 3846 nmp = VFSTONFS(vnode_mount(vp)); 3847 np = VTONFS(vp); 3848 NFSLOCKCLSTATE(); 3849 /* 3850 * Loop around waiting for: 3851 * - outstanding I/O operations on delegations to complete 3852 * - for a delegation on vp that has state, lock the client and 3853 * do a recall 3854 * - return delegation with no state 3855 */ 3856 while (1) { 3857 clp = nfscl_findcl(nmp); 3858 if (clp == NULL) { 3859 NFSUNLOCKCLSTATE(); 3860 return (retcnt); 3861 } 3862 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3863 np->n_fhp->nfh_len); 3864 if (dp != NULL) { 3865 /* 3866 * Wait for outstanding I/O ops to be done. 3867 */ 3868 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3869 if (igotlock) { 3870 nfsv4_unlock(&clp->nfsc_lock, 0); 3871 igotlock = 0; 3872 } 3873 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3874 (void) nfsmsleep(&dp->nfsdl_rwlock, 3875 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3876 continue; 3877 } 3878 needsrecall = 0; 3879 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3880 if (!LIST_EMPTY(&owp->nfsow_open)) { 3881 needsrecall = 1; 3882 break; 3883 } 3884 } 3885 if (!needsrecall) { 3886 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3887 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3888 needsrecall = 1; 3889 break; 3890 } 3891 } 3892 } 3893 if (needsrecall && !triedrecall) { 3894 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 3895 islept = 0; 3896 while (!igotlock) { 3897 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 3898 &islept, NFSCLSTATEMUTEXPTR, NULL); 3899 if (islept) 3900 break; 3901 } 3902 if (islept) 3903 continue; 3904 NFSUNLOCKCLSTATE(); 3905 cred = newnfs_getcred(); 3906 newnfs_copycred(&dp->nfsdl_cred, cred); 3907 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 3908 NFSFREECRED(cred); 3909 triedrecall = 1; 3910 NFSLOCKCLSTATE(); 3911 nfsv4_unlock(&clp->nfsc_lock, 0); 3912 igotlock = 0; 3913 continue; 3914 } 3915 *stp = dp->nfsdl_stateid; 3916 retcnt = 1; 3917 nfscl_cleandeleg(dp); 3918 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3919 } 3920 if (igotlock) 3921 nfsv4_unlock(&clp->nfsc_lock, 0); 3922 NFSUNLOCKCLSTATE(); 3923 return (retcnt); 3924 } 3925 } 3926 3927 /* 3928 * Look for associated delegation(s) that should be DelegReturned. 3929 */ 3930 APPLESTATIC int 3931 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 3932 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 3933 { 3934 struct nfsclclient *clp; 3935 struct nfscldeleg *dp; 3936 struct nfsclowner *owp; 3937 struct nfscllockowner *lp; 3938 struct nfsmount *nmp; 3939 struct ucred *cred; 3940 struct nfsnode *np; 3941 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 3942 3943 nmp = VFSTONFS(vnode_mount(fvp)); 3944 *gotfdp = 0; 3945 *gottdp = 0; 3946 NFSLOCKCLSTATE(); 3947 /* 3948 * Loop around waiting for: 3949 * - outstanding I/O operations on delegations to complete 3950 * - for a delegation on fvp that has state, lock the client and 3951 * do a recall 3952 * - return delegation(s) with no state. 3953 */ 3954 while (1) { 3955 clp = nfscl_findcl(nmp); 3956 if (clp == NULL) { 3957 NFSUNLOCKCLSTATE(); 3958 return (retcnt); 3959 } 3960 np = VTONFS(fvp); 3961 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3962 np->n_fhp->nfh_len); 3963 if (dp != NULL && *gotfdp == 0) { 3964 /* 3965 * Wait for outstanding I/O ops to be done. 3966 */ 3967 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3968 if (igotlock) { 3969 nfsv4_unlock(&clp->nfsc_lock, 0); 3970 igotlock = 0; 3971 } 3972 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3973 (void) nfsmsleep(&dp->nfsdl_rwlock, 3974 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3975 continue; 3976 } 3977 needsrecall = 0; 3978 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3979 if (!LIST_EMPTY(&owp->nfsow_open)) { 3980 needsrecall = 1; 3981 break; 3982 } 3983 } 3984 if (!needsrecall) { 3985 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3986 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3987 needsrecall = 1; 3988 break; 3989 } 3990 } 3991 } 3992 if (needsrecall && !triedrecall) { 3993 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 3994 islept = 0; 3995 while (!igotlock) { 3996 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 3997 &islept, NFSCLSTATEMUTEXPTR, NULL); 3998 if (islept) 3999 break; 4000 } 4001 if (islept) 4002 continue; 4003 NFSUNLOCKCLSTATE(); 4004 cred = newnfs_getcred(); 4005 newnfs_copycred(&dp->nfsdl_cred, cred); 4006 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4007 NFSFREECRED(cred); 4008 triedrecall = 1; 4009 NFSLOCKCLSTATE(); 4010 nfsv4_unlock(&clp->nfsc_lock, 0); 4011 igotlock = 0; 4012 continue; 4013 } 4014 *fstp = dp->nfsdl_stateid; 4015 retcnt++; 4016 *gotfdp = 1; 4017 nfscl_cleandeleg(dp); 4018 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4019 } 4020 if (igotlock) { 4021 nfsv4_unlock(&clp->nfsc_lock, 0); 4022 igotlock = 0; 4023 } 4024 if (tvp != NULL) { 4025 np = VTONFS(tvp); 4026 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4027 np->n_fhp->nfh_len); 4028 if (dp != NULL && *gottdp == 0) { 4029 /* 4030 * Wait for outstanding I/O ops to be done. 4031 */ 4032 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4033 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4034 (void) nfsmsleep(&dp->nfsdl_rwlock, 4035 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4036 continue; 4037 } 4038 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4039 if (!LIST_EMPTY(&owp->nfsow_open)) { 4040 NFSUNLOCKCLSTATE(); 4041 return (retcnt); 4042 } 4043 } 4044 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4045 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4046 NFSUNLOCKCLSTATE(); 4047 return (retcnt); 4048 } 4049 } 4050 *tstp = dp->nfsdl_stateid; 4051 retcnt++; 4052 *gottdp = 1; 4053 nfscl_cleandeleg(dp); 4054 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4055 } 4056 } 4057 NFSUNLOCKCLSTATE(); 4058 return (retcnt); 4059 } 4060 } 4061 4062 /* 4063 * Get a reference on the clientid associated with the mount point. 4064 * Return 1 if success, 0 otherwise. 4065 */ 4066 APPLESTATIC int 4067 nfscl_getref(struct nfsmount *nmp) 4068 { 4069 struct nfsclclient *clp; 4070 4071 NFSLOCKCLSTATE(); 4072 clp = nfscl_findcl(nmp); 4073 if (clp == NULL) { 4074 NFSUNLOCKCLSTATE(); 4075 return (0); 4076 } 4077 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4078 NFSUNLOCKCLSTATE(); 4079 return (1); 4080 } 4081 4082 /* 4083 * Release a reference on a clientid acquired with the above call. 4084 */ 4085 APPLESTATIC void 4086 nfscl_relref(struct nfsmount *nmp) 4087 { 4088 struct nfsclclient *clp; 4089 4090 NFSLOCKCLSTATE(); 4091 clp = nfscl_findcl(nmp); 4092 if (clp == NULL) { 4093 NFSUNLOCKCLSTATE(); 4094 return; 4095 } 4096 nfsv4_relref(&clp->nfsc_lock); 4097 NFSUNLOCKCLSTATE(); 4098 } 4099 4100 /* 4101 * Save the size attribute in the delegation, since the nfsnode 4102 * is going away. 4103 */ 4104 APPLESTATIC void 4105 nfscl_reclaimnode(vnode_t vp) 4106 { 4107 struct nfsclclient *clp; 4108 struct nfscldeleg *dp; 4109 struct nfsnode *np = VTONFS(vp); 4110 struct nfsmount *nmp; 4111 4112 nmp = VFSTONFS(vnode_mount(vp)); 4113 if (!NFSHASNFSV4(nmp)) 4114 return; 4115 NFSLOCKCLSTATE(); 4116 clp = nfscl_findcl(nmp); 4117 if (clp == NULL) { 4118 NFSUNLOCKCLSTATE(); 4119 return; 4120 } 4121 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4122 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4123 dp->nfsdl_size = np->n_size; 4124 NFSUNLOCKCLSTATE(); 4125 } 4126 4127 /* 4128 * Get the saved size attribute in the delegation, since it is a 4129 * newly allocated nfsnode. 4130 */ 4131 APPLESTATIC void 4132 nfscl_newnode(vnode_t vp) 4133 { 4134 struct nfsclclient *clp; 4135 struct nfscldeleg *dp; 4136 struct nfsnode *np = VTONFS(vp); 4137 struct nfsmount *nmp; 4138 4139 nmp = VFSTONFS(vnode_mount(vp)); 4140 if (!NFSHASNFSV4(nmp)) 4141 return; 4142 NFSLOCKCLSTATE(); 4143 clp = nfscl_findcl(nmp); 4144 if (clp == NULL) { 4145 NFSUNLOCKCLSTATE(); 4146 return; 4147 } 4148 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4149 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4150 np->n_size = dp->nfsdl_size; 4151 NFSUNLOCKCLSTATE(); 4152 } 4153 4154 /* 4155 * If there is a valid write delegation for this file, set the modtime 4156 * to the local clock time. 4157 */ 4158 APPLESTATIC void 4159 nfscl_delegmodtime(vnode_t vp) 4160 { 4161 struct nfsclclient *clp; 4162 struct nfscldeleg *dp; 4163 struct nfsnode *np = VTONFS(vp); 4164 struct nfsmount *nmp; 4165 4166 nmp = VFSTONFS(vnode_mount(vp)); 4167 if (!NFSHASNFSV4(nmp)) 4168 return; 4169 NFSLOCKCLSTATE(); 4170 clp = nfscl_findcl(nmp); 4171 if (clp == NULL) { 4172 NFSUNLOCKCLSTATE(); 4173 return; 4174 } 4175 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4176 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4177 NFSGETNANOTIME(&dp->nfsdl_modtime); 4178 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4179 } 4180 NFSUNLOCKCLSTATE(); 4181 } 4182 4183 /* 4184 * If there is a valid write delegation for this file with a modtime set, 4185 * put that modtime in mtime. 4186 */ 4187 APPLESTATIC void 4188 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4189 { 4190 struct nfsclclient *clp; 4191 struct nfscldeleg *dp; 4192 struct nfsnode *np = VTONFS(vp); 4193 struct nfsmount *nmp; 4194 4195 nmp = VFSTONFS(vnode_mount(vp)); 4196 if (!NFSHASNFSV4(nmp)) 4197 return; 4198 NFSLOCKCLSTATE(); 4199 clp = nfscl_findcl(nmp); 4200 if (clp == NULL) { 4201 NFSUNLOCKCLSTATE(); 4202 return; 4203 } 4204 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4205 if (dp != NULL && 4206 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4207 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4208 *mtime = dp->nfsdl_modtime; 4209 NFSUNLOCKCLSTATE(); 4210 } 4211 4212 static int 4213 nfscl_errmap(struct nfsrv_descript *nd) 4214 { 4215 short *defaulterrp, *errp; 4216 4217 if (!nd->nd_repstat) 4218 return (0); 4219 if (nd->nd_procnum == NFSPROC_NOOP) 4220 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4221 if (nd->nd_repstat == EBADRPC) 4222 return (txdr_unsigned(NFSERR_BADXDR)); 4223 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4224 nd->nd_repstat == NFSERR_OPILLEGAL) 4225 return (txdr_unsigned(nd->nd_repstat)); 4226 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4227 while (*++errp) 4228 if (*errp == (short)nd->nd_repstat) 4229 return (txdr_unsigned(nd->nd_repstat)); 4230 return (txdr_unsigned(*defaulterrp)); 4231 } 4232 4233