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 /* for read aheads or write behinds, use the open cred */ 563 newnfs_copycred(&op->nfso_cred, cred); 564 } 565 566 /* 567 * No lock stateid, so return the open stateid. 568 */ 569 stateidp->seqid = op->nfso_stateid.seqid; 570 stateidp->other[0] = op->nfso_stateid.other[0]; 571 stateidp->other[1] = op->nfso_stateid.other[1]; 572 stateidp->other[2] = op->nfso_stateid.other[2]; 573 NFSUNLOCKCLSTATE(); 574 return (0); 575 } 576 577 /* 578 * Search for a matching file, mode and, optionally, lockowner. 579 */ 580 static int 581 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 582 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode, 583 struct nfscllockowner **lpp, struct nfsclopen **opp) 584 { 585 struct nfsclowner *owp; 586 struct nfsclopen *op, *rop, *rop2; 587 struct nfscllockowner *lp; 588 int keep_looping; 589 590 if (lpp != NULL) 591 *lpp = NULL; 592 /* 593 * rop will be set to the open to be returned. There are three 594 * variants of this, all for an open of the correct file: 595 * 1 - A match of lockown. 596 * 2 - A match of the openown, when no lockown match exists. 597 * 3 - A match for any open, if no openown or lockown match exists. 598 * Looking for #2 over #3 probably isn't necessary, but since 599 * RFC3530 is vague w.r.t. the relationship between openowners and 600 * lockowners, I think this is the safer way to go. 601 */ 602 rop = NULL; 603 rop2 = NULL; 604 keep_looping = 1; 605 /* Search the client list */ 606 owp = LIST_FIRST(ohp); 607 while (owp != NULL && keep_looping != 0) { 608 /* and look for the correct open */ 609 op = LIST_FIRST(&owp->nfsow_open); 610 while (op != NULL && keep_looping != 0) { 611 if (op->nfso_fhlen == fhlen && 612 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 613 && (op->nfso_mode & mode) == mode) { 614 if (lpp != NULL) { 615 /* Now look for a matching lockowner. */ 616 LIST_FOREACH(lp, &op->nfso_lock, 617 nfsl_list) { 618 if (!NFSBCMP(lp->nfsl_owner, 619 lockown, 620 NFSV4CL_LOCKNAMELEN)) { 621 *lpp = lp; 622 rop = op; 623 keep_looping = 0; 624 break; 625 } 626 } 627 } 628 if (rop == NULL && !NFSBCMP(owp->nfsow_owner, 629 openown, NFSV4CL_LOCKNAMELEN)) { 630 rop = op; 631 if (lpp == NULL) 632 keep_looping = 0; 633 } 634 if (rop2 == NULL) 635 rop2 = op; 636 } 637 op = LIST_NEXT(op, nfso_list); 638 } 639 owp = LIST_NEXT(owp, nfsow_list); 640 } 641 if (rop == NULL) 642 rop = rop2; 643 if (rop == NULL) 644 return (EBADF); 645 *opp = rop; 646 return (0); 647 } 648 649 /* 650 * Release use of an open owner. Called when open operations are done 651 * with the open owner. 652 */ 653 APPLESTATIC void 654 nfscl_ownerrelease(struct nfsclowner *owp, __unused int error, 655 __unused int candelete, int unlocked) 656 { 657 658 if (owp == NULL) 659 return; 660 NFSLOCKCLSTATE(); 661 if (!unlocked) 662 nfscl_lockunlock(&owp->nfsow_rwlock); 663 nfscl_clrelease(owp->nfsow_clp); 664 NFSUNLOCKCLSTATE(); 665 } 666 667 /* 668 * Release use of an open structure under an open owner. 669 */ 670 APPLESTATIC void 671 nfscl_openrelease(struct nfsclopen *op, int error, int candelete) 672 { 673 struct nfsclclient *clp; 674 struct nfsclowner *owp; 675 676 if (op == NULL) 677 return; 678 NFSLOCKCLSTATE(); 679 owp = op->nfso_own; 680 nfscl_lockunlock(&owp->nfsow_rwlock); 681 clp = owp->nfsow_clp; 682 if (error && candelete && op->nfso_opencnt == 0) 683 nfscl_freeopen(op, 0); 684 nfscl_clrelease(clp); 685 NFSUNLOCKCLSTATE(); 686 } 687 688 /* 689 * Called to get a clientid structure. It will optionally lock the 690 * client data structures to do the SetClientId/SetClientId_confirm, 691 * but will release that lock and return the clientid with a refernce 692 * count on it. 693 * If the "cred" argument is NULL, a new clientid should not be created. 694 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 695 * be done. 696 * It always clpp with a reference count on it, unless returning an error. 697 */ 698 APPLESTATIC int 699 nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p, 700 struct nfsclclient **clpp) 701 { 702 struct nfsclclient *clp; 703 struct nfsclclient *newclp = NULL; 704 struct mount *mp; 705 struct nfsmount *nmp; 706 char uuid[HOSTUUIDLEN]; 707 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 708 u_int16_t idlen = 0; 709 710 mp = vnode_mount(vp); 711 nmp = VFSTONFS(mp); 712 if (cred != NULL) { 713 getcredhostuuid(cred, uuid, sizeof uuid); 714 idlen = strlen(uuid); 715 if (idlen > 0) 716 idlen += sizeof (u_int64_t); 717 else 718 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 719 MALLOC(newclp, struct nfsclclient *, 720 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 721 M_WAITOK); 722 } 723 NFSLOCKCLSTATE(); 724 /* 725 * If a forced dismount is already in progress, don't 726 * allocate a new clientid and get out now. For the case where 727 * clp != NULL, this is a harmless optimization. 728 */ 729 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 730 NFSUNLOCKCLSTATE(); 731 if (newclp != NULL) 732 free(newclp, M_NFSCLCLIENT); 733 return (EBADF); 734 } 735 clp = nmp->nm_clp; 736 if (clp == NULL) { 737 if (newclp == NULL) { 738 NFSUNLOCKCLSTATE(); 739 return (EACCES); 740 } 741 clp = newclp; 742 NFSBZERO((caddr_t)clp, sizeof(struct nfsclclient) + idlen - 1); 743 clp->nfsc_idlen = idlen; 744 LIST_INIT(&clp->nfsc_owner); 745 TAILQ_INIT(&clp->nfsc_deleg); 746 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 747 LIST_INIT(&clp->nfsc_deleghash[i]); 748 clp->nfsc_flags = NFSCLFLAGS_INITED; 749 clp->nfsc_clientidrev = 1; 750 clp->nfsc_cbident = nfscl_nextcbident(); 751 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 752 clp->nfsc_idlen); 753 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 754 nmp->nm_clp = clp; 755 clp->nfsc_nmp = nmp; 756 NFSUNLOCKCLSTATE(); 757 nfscl_start_renewthread(clp); 758 } else { 759 NFSUNLOCKCLSTATE(); 760 if (newclp != NULL) 761 FREE((caddr_t)newclp, M_NFSCLCLIENT); 762 } 763 NFSLOCKCLSTATE(); 764 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 765 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0) 766 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 767 NFSCLSTATEMUTEXPTR, mp); 768 if (!igotlock) 769 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 770 if (igotlock == 0 && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 771 /* 772 * Both nfsv4_lock() and nfsv4_getref() know to check 773 * for MNTK_UNMOUNTF and return without sleeping to 774 * wait for the exclusive lock to be released, since it 775 * might be held by nfscl_umount() and we need to get out 776 * now for that case and not wait until nfscl_umount() 777 * releases it. 778 */ 779 NFSUNLOCKCLSTATE(); 780 return (EBADF); 781 } 782 NFSUNLOCKCLSTATE(); 783 784 /* 785 * If it needs a clientid, do the setclientid now. 786 */ 787 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 788 if (!igotlock) 789 panic("nfscl_clget"); 790 if (p == NULL || cred == NULL) { 791 NFSLOCKCLSTATE(); 792 nfsv4_unlock(&clp->nfsc_lock, 0); 793 NFSUNLOCKCLSTATE(); 794 return (EACCES); 795 } 796 /* 797 * If RFC3530 Sec. 14.2.33 is taken literally, 798 * NFSERR_CLIDINUSE will be returned persistently for the 799 * case where a new mount of the same file system is using 800 * a different principal. In practice, NFSERR_CLIDINUSE is 801 * only returned when there is outstanding unexpired state 802 * on the clientid. As such, try for twice the lease 803 * interval, if we know what that is. Otherwise, make a 804 * wild ass guess. 805 * The case of returning NFSERR_STALECLIENTID is far less 806 * likely, but might occur if there is a significant delay 807 * between doing the SetClientID and SetClientIDConfirm Ops, 808 * such that the server throws away the clientid before 809 * receiving the SetClientIDConfirm. 810 */ 811 if (clp->nfsc_renew > 0) 812 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 813 else 814 clidinusedelay = 120; 815 trystalecnt = 3; 816 do { 817 error = nfsrpc_setclient(VFSTONFS(vnode_mount(vp)), 818 clp, cred, p); 819 if (error == NFSERR_STALECLIENTID || 820 error == NFSERR_STALEDONTRECOVER || 821 error == NFSERR_CLIDINUSE) { 822 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 823 } 824 } while (((error == NFSERR_STALECLIENTID || 825 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 826 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 827 if (error) { 828 NFSLOCKCLSTATE(); 829 nfsv4_unlock(&clp->nfsc_lock, 0); 830 NFSUNLOCKCLSTATE(); 831 return (error); 832 } 833 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 834 } 835 if (igotlock) { 836 NFSLOCKCLSTATE(); 837 nfsv4_unlock(&clp->nfsc_lock, 1); 838 NFSUNLOCKCLSTATE(); 839 } 840 841 *clpp = clp; 842 return (0); 843 } 844 845 /* 846 * Get a reference to a clientid and return it, if valid. 847 */ 848 APPLESTATIC struct nfsclclient * 849 nfscl_findcl(struct nfsmount *nmp) 850 { 851 struct nfsclclient *clp; 852 853 clp = nmp->nm_clp; 854 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 855 return (NULL); 856 return (clp); 857 } 858 859 /* 860 * Release the clientid structure. It may be locked or reference counted. 861 */ 862 static void 863 nfscl_clrelease(struct nfsclclient *clp) 864 { 865 866 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 867 nfsv4_unlock(&clp->nfsc_lock, 0); 868 else 869 nfsv4_relref(&clp->nfsc_lock); 870 } 871 872 /* 873 * External call for nfscl_clrelease. 874 */ 875 APPLESTATIC void 876 nfscl_clientrelease(struct nfsclclient *clp) 877 { 878 879 NFSLOCKCLSTATE(); 880 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 881 nfsv4_unlock(&clp->nfsc_lock, 0); 882 else 883 nfsv4_relref(&clp->nfsc_lock); 884 NFSUNLOCKCLSTATE(); 885 } 886 887 /* 888 * Called when wanting to lock a byte region. 889 */ 890 APPLESTATIC int 891 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 892 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 893 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 894 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 895 { 896 struct nfscllockowner *lp; 897 struct nfsclopen *op; 898 struct nfsclclient *clp; 899 struct nfscllockowner *nlp; 900 struct nfscllock *nlop, *otherlop; 901 struct nfscldeleg *dp = NULL, *ldp = NULL; 902 struct nfscllockownerhead *lhp = NULL; 903 struct nfsnode *np; 904 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 905 u_int8_t *openownp; 906 int error = 0, ret, donelocally = 0; 907 u_int32_t mode; 908 909 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 910 mode = 0; 911 np = VTONFS(vp); 912 *lpp = NULL; 913 lp = NULL; 914 *newonep = 0; 915 *donelocallyp = 0; 916 917 /* 918 * Might need these, so MALLOC them now, to 919 * avoid a tsleep() in MALLOC later. 920 */ 921 MALLOC(nlp, struct nfscllockowner *, 922 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 923 MALLOC(otherlop, struct nfscllock *, 924 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 925 MALLOC(nlop, struct nfscllock *, 926 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 927 nlop->nfslo_type = type; 928 nlop->nfslo_first = off; 929 if (len == NFS64BITSSET) { 930 nlop->nfslo_end = NFS64BITSSET; 931 } else { 932 nlop->nfslo_end = off + len; 933 if (nlop->nfslo_end <= nlop->nfslo_first) 934 error = NFSERR_INVAL; 935 } 936 937 if (!error) { 938 if (recovery) 939 clp = rclp; 940 else 941 error = nfscl_getcl(vp, cred, p, &clp); 942 } 943 if (error) { 944 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 945 FREE((caddr_t)otherlop, M_NFSCLLOCK); 946 FREE((caddr_t)nlop, M_NFSCLLOCK); 947 return (error); 948 } 949 950 op = NULL; 951 if (recovery) { 952 ownp = rownp; 953 openownp = ropenownp; 954 } else { 955 nfscl_filllockowner(id, own, flags); 956 ownp = own; 957 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 958 openownp = openown; 959 } 960 if (!recovery) { 961 NFSLOCKCLSTATE(); 962 /* 963 * First, search for a delegation. If one exists for this file, 964 * the lock can be done locally against it, so long as there 965 * isn't a local lock conflict. 966 */ 967 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 968 np->n_fhp->nfh_len); 969 /* Just sanity check for correct type of delegation */ 970 if (dp != NULL && ((dp->nfsdl_flags & 971 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 972 (type == F_WRLCK && 973 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 974 dp = NULL; 975 } 976 if (dp != NULL) { 977 /* Now, find an open and maybe a lockowner. */ 978 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 979 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 980 if (ret) 981 ret = nfscl_getopen(&clp->nfsc_owner, 982 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 983 ownp, mode, NULL, &op); 984 if (!ret) { 985 lhp = &dp->nfsdl_lock; 986 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 987 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 988 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 989 donelocally = 1; 990 } else { 991 dp = NULL; 992 } 993 } 994 if (!donelocally) { 995 /* 996 * Get the related Open and maybe lockowner. 997 */ 998 error = nfscl_getopen(&clp->nfsc_owner, 999 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1000 ownp, mode, &lp, &op); 1001 if (!error) 1002 lhp = &op->nfso_lock; 1003 } 1004 if (!error && !recovery) 1005 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1006 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1007 if (error) { 1008 if (!recovery) { 1009 nfscl_clrelease(clp); 1010 NFSUNLOCKCLSTATE(); 1011 } 1012 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1013 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1014 FREE((caddr_t)nlop, M_NFSCLLOCK); 1015 return (error); 1016 } 1017 1018 /* 1019 * Ok, see if a lockowner exists and create one, as required. 1020 */ 1021 if (lp == NULL) 1022 LIST_FOREACH(lp, lhp, nfsl_list) { 1023 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1024 break; 1025 } 1026 if (lp == NULL) { 1027 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1028 if (recovery) 1029 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1030 NFSV4CL_LOCKNAMELEN); 1031 else 1032 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1033 NFSV4CL_LOCKNAMELEN); 1034 nlp->nfsl_seqid = 0; 1035 nlp->nfsl_lockflags = flags; 1036 nlp->nfsl_inprog = NULL; 1037 nfscl_lockinit(&nlp->nfsl_rwlock); 1038 LIST_INIT(&nlp->nfsl_lock); 1039 if (donelocally) { 1040 nlp->nfsl_open = NULL; 1041 newnfsstats.cllocallockowners++; 1042 } else { 1043 nlp->nfsl_open = op; 1044 newnfsstats.cllockowners++; 1045 } 1046 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1047 lp = nlp; 1048 nlp = NULL; 1049 *newonep = 1; 1050 } 1051 1052 /* 1053 * Now, update the byte ranges for locks. 1054 */ 1055 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1056 if (!ret) 1057 donelocally = 1; 1058 if (donelocally) { 1059 *donelocallyp = 1; 1060 if (!recovery) 1061 nfscl_clrelease(clp); 1062 } else { 1063 /* 1064 * Serial modifications on the lock owner for multiple threads 1065 * for the same process using a read/write lock. 1066 */ 1067 if (!recovery) 1068 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1069 } 1070 if (!recovery) 1071 NFSUNLOCKCLSTATE(); 1072 1073 if (nlp) 1074 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1075 if (nlop) 1076 FREE((caddr_t)nlop, M_NFSCLLOCK); 1077 if (otherlop) 1078 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1079 1080 *lpp = lp; 1081 return (0); 1082 } 1083 1084 /* 1085 * Called to unlock a byte range, for LockU. 1086 */ 1087 APPLESTATIC int 1088 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1089 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1090 struct nfsclclient *clp, void *id, int flags, 1091 struct nfscllockowner **lpp, int *dorpcp) 1092 { 1093 struct nfscllockowner *lp; 1094 struct nfsclowner *owp; 1095 struct nfsclopen *op; 1096 struct nfscllock *nlop, *other_lop = NULL; 1097 struct nfscldeleg *dp; 1098 struct nfsnode *np; 1099 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1100 int ret = 0, fnd; 1101 1102 np = VTONFS(vp); 1103 *lpp = NULL; 1104 *dorpcp = 0; 1105 1106 /* 1107 * Might need these, so MALLOC them now, to 1108 * avoid a tsleep() in MALLOC later. 1109 */ 1110 MALLOC(nlop, struct nfscllock *, 1111 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1112 nlop->nfslo_type = F_UNLCK; 1113 nlop->nfslo_first = off; 1114 if (len == NFS64BITSSET) { 1115 nlop->nfslo_end = NFS64BITSSET; 1116 } else { 1117 nlop->nfslo_end = off + len; 1118 if (nlop->nfslo_end <= nlop->nfslo_first) { 1119 FREE((caddr_t)nlop, M_NFSCLLOCK); 1120 return (NFSERR_INVAL); 1121 } 1122 } 1123 if (callcnt == 0) { 1124 MALLOC(other_lop, struct nfscllock *, 1125 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1126 *other_lop = *nlop; 1127 } 1128 nfscl_filllockowner(id, own, flags); 1129 dp = NULL; 1130 NFSLOCKCLSTATE(); 1131 if (callcnt == 0) 1132 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1133 np->n_fhp->nfh_len); 1134 1135 /* 1136 * First, unlock any local regions on a delegation. 1137 */ 1138 if (dp != NULL) { 1139 /* Look for this lockowner. */ 1140 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1141 if (!NFSBCMP(lp->nfsl_owner, own, 1142 NFSV4CL_LOCKNAMELEN)) 1143 break; 1144 } 1145 if (lp != NULL) 1146 /* Use other_lop, so nlop is still available */ 1147 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1148 } 1149 1150 /* 1151 * Now, find a matching open/lockowner that hasn't already been done, 1152 * as marked by nfsl_inprog. 1153 */ 1154 lp = NULL; 1155 fnd = 0; 1156 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1157 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1158 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1159 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1160 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1161 if (lp->nfsl_inprog == NULL && 1162 !NFSBCMP(lp->nfsl_owner, own, 1163 NFSV4CL_LOCKNAMELEN)) { 1164 fnd = 1; 1165 break; 1166 } 1167 } 1168 if (fnd) 1169 break; 1170 } 1171 } 1172 if (fnd) 1173 break; 1174 } 1175 1176 if (lp != NULL) { 1177 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1178 if (ret) 1179 *dorpcp = 1; 1180 /* 1181 * Serial modifications on the lock owner for multiple 1182 * threads for the same process using a read/write lock. 1183 */ 1184 lp->nfsl_inprog = p; 1185 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1186 *lpp = lp; 1187 } 1188 NFSUNLOCKCLSTATE(); 1189 if (nlop) 1190 FREE((caddr_t)nlop, M_NFSCLLOCK); 1191 if (other_lop) 1192 FREE((caddr_t)other_lop, M_NFSCLLOCK); 1193 return (0); 1194 } 1195 1196 /* 1197 * Release all lockowners marked in progess for this process and file. 1198 */ 1199 APPLESTATIC void 1200 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1201 void *id, int flags) 1202 { 1203 struct nfsclowner *owp; 1204 struct nfsclopen *op; 1205 struct nfscllockowner *lp; 1206 struct nfsnode *np; 1207 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1208 1209 np = VTONFS(vp); 1210 nfscl_filllockowner(id, own, flags); 1211 NFSLOCKCLSTATE(); 1212 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1213 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1214 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1215 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1216 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1217 if (lp->nfsl_inprog == p && 1218 !NFSBCMP(lp->nfsl_owner, own, 1219 NFSV4CL_LOCKNAMELEN)) { 1220 lp->nfsl_inprog = NULL; 1221 nfscl_lockunlock(&lp->nfsl_rwlock); 1222 } 1223 } 1224 } 1225 } 1226 } 1227 nfscl_clrelease(clp); 1228 NFSUNLOCKCLSTATE(); 1229 } 1230 1231 /* 1232 * Called to find out if any bytes within the byte range specified are 1233 * write locked by the calling process. Used to determine if flushing 1234 * is required before a LockU. 1235 * If in doubt, return 1, so the flush will occur. 1236 */ 1237 APPLESTATIC int 1238 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1239 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1240 { 1241 struct nfsclowner *owp; 1242 struct nfscllockowner *lp; 1243 struct nfsclopen *op; 1244 struct nfsclclient *clp; 1245 struct nfscllock *lop; 1246 struct nfscldeleg *dp; 1247 struct nfsnode *np; 1248 u_int64_t off, end; 1249 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1250 int error = 0; 1251 1252 np = VTONFS(vp); 1253 switch (fl->l_whence) { 1254 case SEEK_SET: 1255 case SEEK_CUR: 1256 /* 1257 * Caller is responsible for adding any necessary offset 1258 * when SEEK_CUR is used. 1259 */ 1260 off = fl->l_start; 1261 break; 1262 case SEEK_END: 1263 off = np->n_size + fl->l_start; 1264 break; 1265 default: 1266 return (1); 1267 }; 1268 if (fl->l_len != 0) { 1269 end = off + fl->l_len; 1270 if (end < off) 1271 return (1); 1272 } else { 1273 end = NFS64BITSSET; 1274 } 1275 1276 error = nfscl_getcl(vp, cred, p, &clp); 1277 if (error) 1278 return (1); 1279 nfscl_filllockowner(id, own, flags); 1280 NFSLOCKCLSTATE(); 1281 1282 /* 1283 * First check the delegation locks. 1284 */ 1285 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1286 if (dp != NULL) { 1287 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1288 if (!NFSBCMP(lp->nfsl_owner, own, 1289 NFSV4CL_LOCKNAMELEN)) 1290 break; 1291 } 1292 if (lp != NULL) { 1293 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1294 if (lop->nfslo_first >= end) 1295 break; 1296 if (lop->nfslo_end <= off) 1297 continue; 1298 if (lop->nfslo_type == F_WRLCK) { 1299 nfscl_clrelease(clp); 1300 NFSUNLOCKCLSTATE(); 1301 return (1); 1302 } 1303 } 1304 } 1305 } 1306 1307 /* 1308 * Now, check state against the server. 1309 */ 1310 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1311 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1312 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1313 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1314 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1315 if (!NFSBCMP(lp->nfsl_owner, own, 1316 NFSV4CL_LOCKNAMELEN)) 1317 break; 1318 } 1319 if (lp != NULL) { 1320 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1321 if (lop->nfslo_first >= end) 1322 break; 1323 if (lop->nfslo_end <= off) 1324 continue; 1325 if (lop->nfslo_type == F_WRLCK) { 1326 nfscl_clrelease(clp); 1327 NFSUNLOCKCLSTATE(); 1328 return (1); 1329 } 1330 } 1331 } 1332 } 1333 } 1334 } 1335 nfscl_clrelease(clp); 1336 NFSUNLOCKCLSTATE(); 1337 return (0); 1338 } 1339 1340 /* 1341 * Release a byte range lock owner structure. 1342 */ 1343 APPLESTATIC void 1344 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1345 { 1346 struct nfsclclient *clp; 1347 1348 if (lp == NULL) 1349 return; 1350 NFSLOCKCLSTATE(); 1351 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1352 if (error != 0 && candelete && 1353 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1354 nfscl_freelockowner(lp, 0); 1355 else 1356 nfscl_lockunlock(&lp->nfsl_rwlock); 1357 nfscl_clrelease(clp); 1358 NFSUNLOCKCLSTATE(); 1359 } 1360 1361 /* 1362 * Free up an open structure and any associated byte range lock structures. 1363 */ 1364 APPLESTATIC void 1365 nfscl_freeopen(struct nfsclopen *op, int local) 1366 { 1367 1368 LIST_REMOVE(op, nfso_list); 1369 nfscl_freealllocks(&op->nfso_lock, local); 1370 FREE((caddr_t)op, M_NFSCLOPEN); 1371 if (local) 1372 newnfsstats.cllocalopens--; 1373 else 1374 newnfsstats.clopens--; 1375 } 1376 1377 /* 1378 * Free up all lock owners and associated locks. 1379 */ 1380 static void 1381 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1382 { 1383 struct nfscllockowner *lp, *nlp; 1384 1385 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1386 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1387 panic("nfscllckw"); 1388 nfscl_freelockowner(lp, local); 1389 } 1390 } 1391 1392 /* 1393 * Called for an Open when NFSERR_EXPIRED is received from the server. 1394 * If there are no byte range locks nor a Share Deny lost, try to do a 1395 * fresh Open. Otherwise, free the open. 1396 */ 1397 static int 1398 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1399 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1400 { 1401 struct nfscllockowner *lp; 1402 struct nfscldeleg *dp; 1403 int mustdelete = 0, error; 1404 1405 /* 1406 * Look for any byte range lock(s). 1407 */ 1408 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1409 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1410 mustdelete = 1; 1411 break; 1412 } 1413 } 1414 1415 /* 1416 * If no byte range lock(s) nor a Share deny, try to re-open. 1417 */ 1418 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1419 newnfs_copycred(&op->nfso_cred, cred); 1420 dp = NULL; 1421 error = nfsrpc_reopen(nmp, op->nfso_fh, 1422 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1423 if (error) { 1424 mustdelete = 1; 1425 if (dp != NULL) { 1426 FREE((caddr_t)dp, M_NFSCLDELEG); 1427 dp = NULL; 1428 } 1429 } 1430 if (dp != NULL) 1431 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1432 op->nfso_fhlen, cred, p, &dp); 1433 } 1434 1435 /* 1436 * If a byte range lock or Share deny or couldn't re-open, free it. 1437 */ 1438 if (mustdelete) 1439 nfscl_freeopen(op, 0); 1440 return (mustdelete); 1441 } 1442 1443 /* 1444 * Free up an open owner structure. 1445 */ 1446 static void 1447 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1448 { 1449 1450 LIST_REMOVE(owp, nfsow_list); 1451 FREE((caddr_t)owp, M_NFSCLOWNER); 1452 if (local) 1453 newnfsstats.cllocalopenowners--; 1454 else 1455 newnfsstats.clopenowners--; 1456 } 1457 1458 /* 1459 * Free up a byte range lock owner structure. 1460 */ 1461 APPLESTATIC void 1462 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1463 { 1464 struct nfscllock *lop, *nlop; 1465 1466 LIST_REMOVE(lp, nfsl_list); 1467 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1468 nfscl_freelock(lop, local); 1469 } 1470 FREE((caddr_t)lp, M_NFSCLLOCKOWNER); 1471 if (local) 1472 newnfsstats.cllocallockowners--; 1473 else 1474 newnfsstats.cllockowners--; 1475 } 1476 1477 /* 1478 * Free up a byte range lock structure. 1479 */ 1480 APPLESTATIC void 1481 nfscl_freelock(struct nfscllock *lop, int local) 1482 { 1483 1484 LIST_REMOVE(lop, nfslo_list); 1485 FREE((caddr_t)lop, M_NFSCLLOCK); 1486 if (local) 1487 newnfsstats.cllocallocks--; 1488 else 1489 newnfsstats.cllocks--; 1490 } 1491 1492 /* 1493 * Clean out the state related to a delegation. 1494 */ 1495 static void 1496 nfscl_cleandeleg(struct nfscldeleg *dp) 1497 { 1498 struct nfsclowner *owp, *nowp; 1499 struct nfsclopen *op; 1500 1501 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1502 op = LIST_FIRST(&owp->nfsow_open); 1503 if (op != NULL) { 1504 if (LIST_NEXT(op, nfso_list) != NULL) 1505 panic("nfscleandel"); 1506 nfscl_freeopen(op, 1); 1507 } 1508 nfscl_freeopenowner(owp, 1); 1509 } 1510 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1511 } 1512 1513 /* 1514 * Free a delegation. 1515 */ 1516 static void 1517 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1518 { 1519 1520 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1521 LIST_REMOVE(dp, nfsdl_hash); 1522 FREE((caddr_t)dp, M_NFSCLDELEG); 1523 newnfsstats.cldelegates--; 1524 nfscl_delegcnt--; 1525 } 1526 1527 /* 1528 * Free up all state related to this client structure. 1529 */ 1530 static void 1531 nfscl_cleanclient(struct nfsclclient *clp) 1532 { 1533 struct nfsclowner *owp, *nowp; 1534 struct nfsclopen *op, *nop; 1535 1536 /* Now, all the OpenOwners, etc. */ 1537 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1538 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1539 nfscl_freeopen(op, 0); 1540 } 1541 nfscl_freeopenowner(owp, 0); 1542 } 1543 } 1544 1545 /* 1546 * Called when an NFSERR_EXPIRED is received from the server. 1547 */ 1548 static void 1549 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1550 struct ucred *cred, NFSPROC_T *p) 1551 { 1552 struct nfsclowner *owp, *nowp, *towp; 1553 struct nfsclopen *op, *nop, *top; 1554 struct nfscldeleg *dp, *ndp; 1555 int ret, printed = 0; 1556 1557 /* 1558 * First, merge locally issued Opens into the list for the server. 1559 */ 1560 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1561 while (dp != NULL) { 1562 ndp = TAILQ_NEXT(dp, nfsdl_list); 1563 owp = LIST_FIRST(&dp->nfsdl_owner); 1564 while (owp != NULL) { 1565 nowp = LIST_NEXT(owp, nfsow_list); 1566 op = LIST_FIRST(&owp->nfsow_open); 1567 if (op != NULL) { 1568 if (LIST_NEXT(op, nfso_list) != NULL) 1569 panic("nfsclexp"); 1570 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1571 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1572 NFSV4CL_LOCKNAMELEN)) 1573 break; 1574 } 1575 if (towp != NULL) { 1576 /* Merge opens in */ 1577 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1578 if (top->nfso_fhlen == op->nfso_fhlen && 1579 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1580 op->nfso_fhlen)) { 1581 top->nfso_mode |= op->nfso_mode; 1582 top->nfso_opencnt += op->nfso_opencnt; 1583 break; 1584 } 1585 } 1586 if (top == NULL) { 1587 /* Just add the open to the owner list */ 1588 LIST_REMOVE(op, nfso_list); 1589 op->nfso_own = towp; 1590 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1591 newnfsstats.cllocalopens--; 1592 newnfsstats.clopens++; 1593 } 1594 } else { 1595 /* Just add the openowner to the client list */ 1596 LIST_REMOVE(owp, nfsow_list); 1597 owp->nfsow_clp = clp; 1598 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1599 newnfsstats.cllocalopenowners--; 1600 newnfsstats.clopenowners++; 1601 newnfsstats.cllocalopens--; 1602 newnfsstats.clopens++; 1603 } 1604 } 1605 owp = nowp; 1606 } 1607 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1608 printed = 1; 1609 printf("nfsv4 expired locks lost\n"); 1610 } 1611 nfscl_cleandeleg(dp); 1612 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1613 dp = ndp; 1614 } 1615 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1616 panic("nfsclexp"); 1617 1618 /* 1619 * Now, try and reopen against the server. 1620 */ 1621 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1622 owp->nfsow_seqid = 0; 1623 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1624 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1625 if (ret && !printed) { 1626 printed = 1; 1627 printf("nfsv4 expired locks lost\n"); 1628 } 1629 } 1630 if (LIST_EMPTY(&owp->nfsow_open)) 1631 nfscl_freeopenowner(owp, 0); 1632 } 1633 } 1634 1635 /* 1636 * This function must be called after the process represented by "own" has 1637 * exited. Must be called with CLSTATE lock held. 1638 */ 1639 static void 1640 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1641 { 1642 struct nfsclowner *owp, *nowp; 1643 struct nfscllockowner *lp, *nlp; 1644 struct nfscldeleg *dp; 1645 1646 /* First, get rid of local locks on delegations. */ 1647 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1648 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1649 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1650 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1651 panic("nfscllckw"); 1652 nfscl_freelockowner(lp, 1); 1653 } 1654 } 1655 } 1656 owp = LIST_FIRST(&clp->nfsc_owner); 1657 while (owp != NULL) { 1658 nowp = LIST_NEXT(owp, nfsow_list); 1659 if (!NFSBCMP(owp->nfsow_owner, own, 1660 NFSV4CL_LOCKNAMELEN)) { 1661 /* 1662 * If there are children that haven't closed the 1663 * file descriptors yet, the opens will still be 1664 * here. For that case, let the renew thread clear 1665 * out the OpenOwner later. 1666 */ 1667 if (LIST_EMPTY(&owp->nfsow_open)) 1668 nfscl_freeopenowner(owp, 0); 1669 else 1670 owp->nfsow_defunct = 1; 1671 } 1672 owp = nowp; 1673 } 1674 } 1675 1676 /* 1677 * Find open/lock owners for processes that have exited. 1678 */ 1679 static void 1680 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1681 { 1682 struct nfsclowner *owp, *nowp; 1683 struct nfsclopen *op; 1684 struct nfscllockowner *lp, *nlp; 1685 1686 NFSPROCLISTLOCK(); 1687 NFSLOCKCLSTATE(); 1688 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1689 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1690 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1691 if (LIST_EMPTY(&lp->nfsl_lock)) 1692 nfscl_emptylockowner(lp, lhp); 1693 } 1694 } 1695 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1696 nfscl_cleanup_common(clp, owp->nfsow_owner); 1697 } 1698 NFSUNLOCKCLSTATE(); 1699 NFSPROCLISTUNLOCK(); 1700 } 1701 1702 /* 1703 * Take the empty lock owner and move it to the local lhp list if the 1704 * associated process no longer exists. 1705 */ 1706 static void 1707 nfscl_emptylockowner(struct nfscllockowner *lp, 1708 struct nfscllockownerfhhead *lhp) 1709 { 1710 struct nfscllockownerfh *lfhp, *mylfhp; 1711 struct nfscllockowner *nlp; 1712 int fnd_it; 1713 1714 /* If not a Posix lock owner, just return. */ 1715 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1716 return; 1717 1718 fnd_it = 0; 1719 mylfhp = NULL; 1720 /* 1721 * First, search to see if this lock owner is already in the list. 1722 * If it is, then the associated process no longer exists. 1723 */ 1724 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1725 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1726 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1727 lfhp->nfslfh_len)) 1728 mylfhp = lfhp; 1729 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1730 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1731 NFSV4CL_LOCKNAMELEN)) 1732 fnd_it = 1; 1733 } 1734 /* If not found, check if process still exists. */ 1735 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1736 return; 1737 1738 /* Move the lock owner over to the local list. */ 1739 if (mylfhp == NULL) { 1740 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1741 M_NOWAIT); 1742 if (mylfhp == NULL) 1743 return; 1744 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1745 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1746 mylfhp->nfslfh_len); 1747 LIST_INIT(&mylfhp->nfslfh_lock); 1748 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1749 } 1750 LIST_REMOVE(lp, nfsl_list); 1751 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1752 } 1753 1754 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1755 /* 1756 * Called from nfs umount to free up the clientid. 1757 */ 1758 APPLESTATIC void 1759 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1760 { 1761 struct nfsclclient *clp; 1762 struct ucred *cred; 1763 int igotlock; 1764 1765 /* 1766 * For the case that matters, this is the thread that set 1767 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1768 * done to ensure that any thread executing nfscl_getcl() after 1769 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1770 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1771 * explanation, courtesy of Alan Cox. 1772 * What follows is a snippet from Alan Cox's email at: 1773 * http://docs.FreeBSD.org/cgi/ 1774 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1775 * 1776 * 1. Set MNTK_UNMOUNTF 1777 * 2. Acquire a standard FreeBSD mutex "m". 1778 * 3. Update some data structures. 1779 * 4. Release mutex "m". 1780 * 1781 * Then, other threads that acquire "m" after step 4 has occurred will 1782 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1783 * step 2 may or may not see MNTK_UNMOUNTF as set. 1784 */ 1785 NFSLOCKCLSTATE(); 1786 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1787 fake_global++; 1788 NFSUNLOCKCLSTATE(); 1789 NFSLOCKCLSTATE(); 1790 } 1791 1792 clp = nmp->nm_clp; 1793 if (clp != NULL) { 1794 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1795 panic("nfscl umount"); 1796 1797 /* 1798 * First, handshake with the nfscl renew thread, to terminate 1799 * it. 1800 */ 1801 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1802 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1803 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1804 "nfsclumnt", hz); 1805 1806 /* 1807 * Now, get the exclusive lock on the client state, so 1808 * that no uses of the state are still in progress. 1809 */ 1810 do { 1811 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1812 NFSCLSTATEMUTEXPTR, NULL); 1813 } while (!igotlock); 1814 NFSUNLOCKCLSTATE(); 1815 1816 /* 1817 * Free up all the state. It will expire on the server, but 1818 * maybe we should do a SetClientId/SetClientIdConfirm so 1819 * the server throws it away? 1820 */ 1821 LIST_REMOVE(clp, nfsc_list); 1822 nfscl_delegreturnall(clp, p); 1823 cred = newnfs_getcred(); 1824 (void) nfsrpc_setclient(nmp, clp, cred, p); 1825 nfscl_cleanclient(clp); 1826 nmp->nm_clp = NULL; 1827 NFSFREECRED(cred); 1828 FREE((caddr_t)clp, M_NFSCLCLIENT); 1829 } else 1830 NFSUNLOCKCLSTATE(); 1831 } 1832 1833 /* 1834 * This function is called when a server replies with NFSERR_STALECLIENTID 1835 * or NFSERR_STALESTATEID. It traverses the clientid lists, doing Opens 1836 * and Locks with reclaim. If these fail, it deletes the corresponding state. 1837 */ 1838 static void 1839 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1840 { 1841 struct nfsclowner *owp, *nowp; 1842 struct nfsclopen *op, *nop; 1843 struct nfscllockowner *lp, *nlp; 1844 struct nfscllock *lop, *nlop; 1845 struct nfscldeleg *dp, *ndp, *tdp; 1846 struct nfsmount *nmp; 1847 struct ucred *tcred; 1848 struct nfsclopenhead extra_open; 1849 struct nfscldeleghead extra_deleg; 1850 struct nfsreq *rep; 1851 u_int64_t len; 1852 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1853 int igotlock = 0, error, trycnt, firstlock, s; 1854 1855 /* 1856 * First, lock the client structure, so everyone else will 1857 * block when trying to use state. 1858 */ 1859 NFSLOCKCLSTATE(); 1860 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1861 do { 1862 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1863 NFSCLSTATEMUTEXPTR, NULL); 1864 } while (!igotlock); 1865 NFSUNLOCKCLSTATE(); 1866 1867 nmp = clp->nfsc_nmp; 1868 if (nmp == NULL) 1869 panic("nfscl recover"); 1870 trycnt = 5; 1871 do { 1872 error = nfsrpc_setclient(nmp, clp, cred, p); 1873 } while ((error == NFSERR_STALECLIENTID || 1874 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 1875 if (error) { 1876 nfscl_cleanclient(clp); 1877 NFSLOCKCLSTATE(); 1878 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 1879 NFSCLFLAGS_RECOVER | NFSCLFLAGS_RECVRINPROG); 1880 wakeup(&clp->nfsc_flags); 1881 nfsv4_unlock(&clp->nfsc_lock, 0); 1882 NFSUNLOCKCLSTATE(); 1883 return; 1884 } 1885 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 1886 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 1887 1888 /* 1889 * Mark requests already queued on the server, so that they don't 1890 * initiate another recovery cycle. Any requests already in the 1891 * queue that handle state information will have the old stale 1892 * clientid/stateid and will get a NFSERR_STALESTATEID or 1893 * NFSERR_STALECLIENTID reply from the server. This will be 1894 * translated to NFSERR_STALEDONTRECOVER when R_DONTRECOVER is set. 1895 */ 1896 s = splsoftclock(); 1897 NFSLOCKREQ(); 1898 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 1899 if (rep->r_nmp == nmp) 1900 rep->r_flags |= R_DONTRECOVER; 1901 } 1902 NFSUNLOCKREQ(); 1903 splx(s); 1904 1905 /* 1906 * Now, mark all delegations "need reclaim". 1907 */ 1908 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 1909 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 1910 1911 TAILQ_INIT(&extra_deleg); 1912 LIST_INIT(&extra_open); 1913 /* 1914 * Now traverse the state lists, doing Open and Lock Reclaims. 1915 */ 1916 tcred = newnfs_getcred(); 1917 owp = LIST_FIRST(&clp->nfsc_owner); 1918 while (owp != NULL) { 1919 nowp = LIST_NEXT(owp, nfsow_list); 1920 owp->nfsow_seqid = 0; 1921 op = LIST_FIRST(&owp->nfsow_open); 1922 while (op != NULL) { 1923 nop = LIST_NEXT(op, nfso_list); 1924 if (error != NFSERR_NOGRACE) { 1925 /* Search for a delegation to reclaim with the open */ 1926 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1927 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1928 continue; 1929 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 1930 mode = NFSV4OPEN_ACCESSWRITE; 1931 delegtype = NFSV4OPEN_DELEGATEWRITE; 1932 } else { 1933 mode = NFSV4OPEN_ACCESSREAD; 1934 delegtype = NFSV4OPEN_DELEGATEREAD; 1935 } 1936 if ((op->nfso_mode & mode) == mode && 1937 op->nfso_fhlen == dp->nfsdl_fhlen && 1938 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 1939 break; 1940 } 1941 ndp = dp; 1942 if (dp == NULL) 1943 delegtype = NFSV4OPEN_DELEGATENONE; 1944 newnfs_copycred(&op->nfso_cred, tcred); 1945 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 1946 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 1947 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 1948 tcred, p); 1949 if (!error) { 1950 /* Handle any replied delegation */ 1951 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 1952 || NFSMNT_RDONLY(nmp->nm_mountp))) { 1953 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 1954 mode = NFSV4OPEN_ACCESSWRITE; 1955 else 1956 mode = NFSV4OPEN_ACCESSREAD; 1957 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1958 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1959 continue; 1960 if ((op->nfso_mode & mode) == mode && 1961 op->nfso_fhlen == dp->nfsdl_fhlen && 1962 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 1963 op->nfso_fhlen)) { 1964 dp->nfsdl_stateid = ndp->nfsdl_stateid; 1965 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 1966 dp->nfsdl_ace = ndp->nfsdl_ace; 1967 dp->nfsdl_change = ndp->nfsdl_change; 1968 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 1969 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 1970 dp->nfsdl_flags |= NFSCLDL_RECALL; 1971 FREE((caddr_t)ndp, M_NFSCLDELEG); 1972 ndp = NULL; 1973 break; 1974 } 1975 } 1976 } 1977 if (ndp != NULL) 1978 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 1979 1980 /* and reclaim all byte range locks */ 1981 lp = LIST_FIRST(&op->nfso_lock); 1982 while (lp != NULL) { 1983 nlp = LIST_NEXT(lp, nfsl_list); 1984 lp->nfsl_seqid = 0; 1985 firstlock = 1; 1986 lop = LIST_FIRST(&lp->nfsl_lock); 1987 while (lop != NULL) { 1988 nlop = LIST_NEXT(lop, nfslo_list); 1989 if (lop->nfslo_end == NFS64BITSSET) 1990 len = NFS64BITSSET; 1991 else 1992 len = lop->nfslo_end - lop->nfslo_first; 1993 if (error != NFSERR_NOGRACE) 1994 error = nfscl_trylock(nmp, NULL, 1995 op->nfso_fh, op->nfso_fhlen, lp, 1996 firstlock, 1, lop->nfslo_first, len, 1997 lop->nfslo_type, tcred, p); 1998 if (error != 0) 1999 nfscl_freelock(lop, 0); 2000 else 2001 firstlock = 0; 2002 lop = nlop; 2003 } 2004 /* If no locks, but a lockowner, just delete it. */ 2005 if (LIST_EMPTY(&lp->nfsl_lock)) 2006 nfscl_freelockowner(lp, 0); 2007 lp = nlp; 2008 } 2009 } else { 2010 nfscl_freeopen(op, 0); 2011 } 2012 } 2013 op = nop; 2014 } 2015 owp = nowp; 2016 } 2017 2018 /* 2019 * Now, try and get any delegations not yet reclaimed by cobbling 2020 * to-gether an appropriate open. 2021 */ 2022 nowp = NULL; 2023 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2024 while (dp != NULL) { 2025 ndp = TAILQ_NEXT(dp, nfsdl_list); 2026 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2027 if (nowp == NULL) { 2028 MALLOC(nowp, struct nfsclowner *, 2029 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2030 /* 2031 * Name must be as long an largest possible 2032 * NFSV4CL_LOCKNAMELEN. 12 for now. 2033 */ 2034 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2035 NFSV4CL_LOCKNAMELEN); 2036 LIST_INIT(&nowp->nfsow_open); 2037 nowp->nfsow_clp = clp; 2038 nowp->nfsow_seqid = 0; 2039 nowp->nfsow_defunct = 0; 2040 nfscl_lockinit(&nowp->nfsow_rwlock); 2041 } 2042 nop = NULL; 2043 if (error != NFSERR_NOGRACE) { 2044 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 2045 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2046 nop->nfso_own = nowp; 2047 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2048 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2049 delegtype = NFSV4OPEN_DELEGATEWRITE; 2050 } else { 2051 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2052 delegtype = NFSV4OPEN_DELEGATEREAD; 2053 } 2054 nop->nfso_opencnt = 0; 2055 nop->nfso_posixlock = 1; 2056 nop->nfso_fhlen = dp->nfsdl_fhlen; 2057 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2058 LIST_INIT(&nop->nfso_lock); 2059 nop->nfso_stateid.seqid = 0; 2060 nop->nfso_stateid.other[0] = 0; 2061 nop->nfso_stateid.other[1] = 0; 2062 nop->nfso_stateid.other[2] = 0; 2063 newnfs_copycred(&dp->nfsdl_cred, tcred); 2064 newnfs_copyincred(tcred, &nop->nfso_cred); 2065 tdp = NULL; 2066 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2067 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2068 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2069 delegtype, tcred, p); 2070 if (tdp != NULL) { 2071 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2072 mode = NFSV4OPEN_ACCESSWRITE; 2073 else 2074 mode = NFSV4OPEN_ACCESSREAD; 2075 if ((nop->nfso_mode & mode) == mode && 2076 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2077 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2078 nop->nfso_fhlen)) { 2079 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2080 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2081 dp->nfsdl_ace = tdp->nfsdl_ace; 2082 dp->nfsdl_change = tdp->nfsdl_change; 2083 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2084 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2085 dp->nfsdl_flags |= NFSCLDL_RECALL; 2086 FREE((caddr_t)tdp, M_NFSCLDELEG); 2087 } else { 2088 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2089 } 2090 } 2091 } 2092 if (error) { 2093 if (nop != NULL) 2094 FREE((caddr_t)nop, M_NFSCLOPEN); 2095 /* 2096 * Couldn't reclaim it, so throw the state 2097 * away. Ouch!! 2098 */ 2099 nfscl_cleandeleg(dp); 2100 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2101 } else { 2102 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2103 } 2104 } 2105 dp = ndp; 2106 } 2107 2108 /* 2109 * Now, get rid of extra Opens and Delegations. 2110 */ 2111 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2112 do { 2113 newnfs_copycred(&op->nfso_cred, tcred); 2114 error = nfscl_tryclose(op, tcred, nmp, p); 2115 if (error == NFSERR_GRACE) 2116 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2117 } while (error == NFSERR_GRACE); 2118 LIST_REMOVE(op, nfso_list); 2119 FREE((caddr_t)op, M_NFSCLOPEN); 2120 } 2121 if (nowp != NULL) 2122 FREE((caddr_t)nowp, M_NFSCLOWNER); 2123 2124 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2125 do { 2126 newnfs_copycred(&dp->nfsdl_cred, tcred); 2127 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2128 if (error == NFSERR_GRACE) 2129 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2130 } while (error == NFSERR_GRACE); 2131 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2132 FREE((caddr_t)dp, M_NFSCLDELEG); 2133 } 2134 2135 NFSLOCKCLSTATE(); 2136 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2137 wakeup(&clp->nfsc_flags); 2138 nfsv4_unlock(&clp->nfsc_lock, 0); 2139 NFSUNLOCKCLSTATE(); 2140 NFSFREECRED(tcred); 2141 } 2142 2143 /* 2144 * This function is called when a server replies with NFSERR_EXPIRED. 2145 * It deletes all state for the client and does a fresh SetClientId/confirm. 2146 * XXX Someday it should post a signal to the process(es) that hold the 2147 * state, so they know that lock state has been lost. 2148 */ 2149 APPLESTATIC int 2150 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2151 { 2152 struct nfsmount *nmp; 2153 struct ucred *cred; 2154 int igotlock = 0, error, trycnt; 2155 2156 /* 2157 * If the clientid has gone away or a new SetClientid has already 2158 * been done, just return ok. 2159 */ 2160 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2161 return (0); 2162 2163 /* 2164 * First, lock the client structure, so everyone else will 2165 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2166 * that only one thread does the work. 2167 */ 2168 NFSLOCKCLSTATE(); 2169 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2170 do { 2171 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2172 NFSCLSTATEMUTEXPTR, NULL); 2173 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2174 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2175 if (igotlock) 2176 nfsv4_unlock(&clp->nfsc_lock, 0); 2177 NFSUNLOCKCLSTATE(); 2178 return (0); 2179 } 2180 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2181 NFSUNLOCKCLSTATE(); 2182 2183 nmp = clp->nfsc_nmp; 2184 if (nmp == NULL) 2185 panic("nfscl expired"); 2186 cred = newnfs_getcred(); 2187 trycnt = 5; 2188 do { 2189 error = nfsrpc_setclient(nmp, clp, cred, p); 2190 } while ((error == NFSERR_STALECLIENTID || 2191 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2192 if (error) { 2193 /* 2194 * Clear out any state. 2195 */ 2196 nfscl_cleanclient(clp); 2197 NFSLOCKCLSTATE(); 2198 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 2199 NFSCLFLAGS_RECOVER); 2200 } else { 2201 /* 2202 * Expire the state for the client. 2203 */ 2204 nfscl_expireclient(clp, nmp, cred, p); 2205 NFSLOCKCLSTATE(); 2206 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2207 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2208 } 2209 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2210 wakeup(&clp->nfsc_flags); 2211 nfsv4_unlock(&clp->nfsc_lock, 0); 2212 NFSUNLOCKCLSTATE(); 2213 NFSFREECRED(cred); 2214 return (error); 2215 } 2216 2217 /* 2218 * This function inserts a lock in the list after insert_lop. 2219 */ 2220 static void 2221 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2222 struct nfscllock *insert_lop, int local) 2223 { 2224 2225 if ((struct nfscllockowner *)insert_lop == lp) 2226 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2227 else 2228 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2229 if (local) 2230 newnfsstats.cllocallocks++; 2231 else 2232 newnfsstats.cllocks++; 2233 } 2234 2235 /* 2236 * This function updates the locking for a lock owner and given file. It 2237 * maintains a list of lock ranges ordered on increasing file offset that 2238 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2239 * It always adds new_lop to the list and sometimes uses the one pointed 2240 * at by other_lopp. 2241 * Returns 1 if the locks were modified, 0 otherwise. 2242 */ 2243 static int 2244 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2245 struct nfscllock **other_lopp, int local) 2246 { 2247 struct nfscllock *new_lop = *new_lopp; 2248 struct nfscllock *lop, *tlop, *ilop; 2249 struct nfscllock *other_lop; 2250 int unlock = 0, modified = 0; 2251 u_int64_t tmp; 2252 2253 /* 2254 * Work down the list until the lock is merged. 2255 */ 2256 if (new_lop->nfslo_type == F_UNLCK) 2257 unlock = 1; 2258 ilop = (struct nfscllock *)lp; 2259 lop = LIST_FIRST(&lp->nfsl_lock); 2260 while (lop != NULL) { 2261 /* 2262 * Only check locks for this file that aren't before the start of 2263 * new lock's range. 2264 */ 2265 if (lop->nfslo_end >= new_lop->nfslo_first) { 2266 if (new_lop->nfslo_end < lop->nfslo_first) { 2267 /* 2268 * If the new lock ends before the start of the 2269 * current lock's range, no merge, just insert 2270 * the new lock. 2271 */ 2272 break; 2273 } 2274 if (new_lop->nfslo_type == lop->nfslo_type || 2275 (new_lop->nfslo_first <= lop->nfslo_first && 2276 new_lop->nfslo_end >= lop->nfslo_end)) { 2277 /* 2278 * This lock can be absorbed by the new lock/unlock. 2279 * This happens when it covers the entire range 2280 * of the old lock or is contiguous 2281 * with the old lock and is of the same type or an 2282 * unlock. 2283 */ 2284 if (new_lop->nfslo_type != lop->nfslo_type || 2285 new_lop->nfslo_first != lop->nfslo_first || 2286 new_lop->nfslo_end != lop->nfslo_end) 2287 modified = 1; 2288 if (lop->nfslo_first < new_lop->nfslo_first) 2289 new_lop->nfslo_first = lop->nfslo_first; 2290 if (lop->nfslo_end > new_lop->nfslo_end) 2291 new_lop->nfslo_end = lop->nfslo_end; 2292 tlop = lop; 2293 lop = LIST_NEXT(lop, nfslo_list); 2294 nfscl_freelock(tlop, local); 2295 continue; 2296 } 2297 2298 /* 2299 * All these cases are for contiguous locks that are not the 2300 * same type, so they can't be merged. 2301 */ 2302 if (new_lop->nfslo_first <= lop->nfslo_first) { 2303 /* 2304 * This case is where the new lock overlaps with the 2305 * first part of the old lock. Move the start of the 2306 * old lock to just past the end of the new lock. The 2307 * new lock will be inserted in front of the old, since 2308 * ilop hasn't been updated. (We are done now.) 2309 */ 2310 if (lop->nfslo_first != new_lop->nfslo_end) { 2311 lop->nfslo_first = new_lop->nfslo_end; 2312 modified = 1; 2313 } 2314 break; 2315 } 2316 if (new_lop->nfslo_end >= lop->nfslo_end) { 2317 /* 2318 * This case is where the new lock overlaps with the 2319 * end of the old lock's range. Move the old lock's 2320 * end to just before the new lock's first and insert 2321 * the new lock after the old lock. 2322 * Might not be done yet, since the new lock could 2323 * overlap further locks with higher ranges. 2324 */ 2325 if (lop->nfslo_end != new_lop->nfslo_first) { 2326 lop->nfslo_end = new_lop->nfslo_first; 2327 modified = 1; 2328 } 2329 ilop = lop; 2330 lop = LIST_NEXT(lop, nfslo_list); 2331 continue; 2332 } 2333 /* 2334 * The final case is where the new lock's range is in the 2335 * middle of the current lock's and splits the current lock 2336 * up. Use *other_lopp to handle the second part of the 2337 * split old lock range. (We are done now.) 2338 * For unlock, we use new_lop as other_lop and tmp, since 2339 * other_lop and new_lop are the same for this case. 2340 * We noted the unlock case above, so we don't need 2341 * new_lop->nfslo_type any longer. 2342 */ 2343 tmp = new_lop->nfslo_first; 2344 if (unlock) { 2345 other_lop = new_lop; 2346 *new_lopp = NULL; 2347 } else { 2348 other_lop = *other_lopp; 2349 *other_lopp = NULL; 2350 } 2351 other_lop->nfslo_first = new_lop->nfslo_end; 2352 other_lop->nfslo_end = lop->nfslo_end; 2353 other_lop->nfslo_type = lop->nfslo_type; 2354 lop->nfslo_end = tmp; 2355 nfscl_insertlock(lp, other_lop, lop, local); 2356 ilop = lop; 2357 modified = 1; 2358 break; 2359 } 2360 ilop = lop; 2361 lop = LIST_NEXT(lop, nfslo_list); 2362 if (lop == NULL) 2363 break; 2364 } 2365 2366 /* 2367 * Insert the new lock in the list at the appropriate place. 2368 */ 2369 if (!unlock) { 2370 nfscl_insertlock(lp, new_lop, ilop, local); 2371 *new_lopp = NULL; 2372 modified = 1; 2373 } 2374 return (modified); 2375 } 2376 2377 /* 2378 * This function must be run as a kernel thread. 2379 * It does Renew Ops and recovery, when required. 2380 */ 2381 APPLESTATIC void 2382 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2383 { 2384 struct nfsclowner *owp, *nowp; 2385 struct nfsclopen *op; 2386 struct nfscllockowner *lp, *nlp; 2387 struct nfscldeleghead dh; 2388 struct nfscldeleg *dp, *ndp; 2389 struct ucred *cred; 2390 u_int32_t clidrev; 2391 int error, cbpathdown, islept, igotlock, ret, clearok; 2392 uint32_t recover_done_time = 0; 2393 struct timespec mytime; 2394 static time_t prevsec = 0; 2395 struct nfscllockownerfh *lfhp, *nlfhp; 2396 struct nfscllockownerfhhead lfh; 2397 2398 cred = newnfs_getcred(); 2399 NFSLOCKCLSTATE(); 2400 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2401 NFSUNLOCKCLSTATE(); 2402 for(;;) { 2403 newnfs_setroot(cred); 2404 cbpathdown = 0; 2405 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2406 /* 2407 * Only allow one recover within 1/2 of the lease 2408 * duration (nfsc_renew). 2409 */ 2410 if (recover_done_time < NFSD_MONOSEC) { 2411 recover_done_time = NFSD_MONOSEC + 2412 clp->nfsc_renew; 2413 nfscl_recover(clp, cred, p); 2414 } else { 2415 NFSLOCKCLSTATE(); 2416 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2417 NFSUNLOCKCLSTATE(); 2418 } 2419 } 2420 if (clp->nfsc_expire <= NFSD_MONOSEC && 2421 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2422 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2423 clidrev = clp->nfsc_clientidrev; 2424 error = nfsrpc_renew(clp, cred, p); 2425 if (error == NFSERR_CBPATHDOWN) 2426 cbpathdown = 1; 2427 else if (error == NFSERR_STALECLIENTID) { 2428 NFSLOCKCLSTATE(); 2429 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2430 NFSUNLOCKCLSTATE(); 2431 } else if (error == NFSERR_EXPIRED) 2432 (void) nfscl_hasexpired(clp, clidrev, p); 2433 } 2434 2435 TAILQ_INIT(&dh); 2436 NFSLOCKCLSTATE(); 2437 if (cbpathdown) 2438 /* It's a Total Recall! */ 2439 nfscl_totalrecall(clp); 2440 2441 /* 2442 * Now, handle defunct owners. 2443 */ 2444 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2445 if (LIST_EMPTY(&owp->nfsow_open)) { 2446 if (owp->nfsow_defunct != 0) 2447 nfscl_freeopenowner(owp, 0); 2448 } 2449 } 2450 2451 /* 2452 * Do the recall on any delegations. To avoid trouble, always 2453 * come back up here after having slept. 2454 */ 2455 igotlock = 0; 2456 tryagain: 2457 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2458 while (dp != NULL) { 2459 ndp = TAILQ_NEXT(dp, nfsdl_list); 2460 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2461 /* 2462 * Wait for outstanding I/O ops to be done. 2463 */ 2464 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2465 if (igotlock) { 2466 nfsv4_unlock(&clp->nfsc_lock, 0); 2467 igotlock = 0; 2468 } 2469 dp->nfsdl_rwlock.nfslock_lock |= 2470 NFSV4LOCK_WANTED; 2471 (void) nfsmsleep(&dp->nfsdl_rwlock, 2472 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2473 NULL); 2474 goto tryagain; 2475 } 2476 while (!igotlock) { 2477 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2478 &islept, NFSCLSTATEMUTEXPTR, NULL); 2479 if (islept) 2480 goto tryagain; 2481 } 2482 NFSUNLOCKCLSTATE(); 2483 newnfs_copycred(&dp->nfsdl_cred, cred); 2484 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2485 NULL, cred, p, 1); 2486 if (!ret) { 2487 nfscl_cleandeleg(dp); 2488 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2489 nfsdl_list); 2490 LIST_REMOVE(dp, nfsdl_hash); 2491 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2492 nfscl_delegcnt--; 2493 newnfsstats.cldelegates--; 2494 } 2495 NFSLOCKCLSTATE(); 2496 } 2497 dp = ndp; 2498 } 2499 2500 /* 2501 * Clear out old delegations, if we are above the high water 2502 * mark. Only clear out ones with no state related to them. 2503 * The tailq list is in LRU order. 2504 */ 2505 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2506 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2507 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2508 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2509 dp->nfsdl_rwlock.nfslock_lock == 0 && 2510 dp->nfsdl_timestamp < NFSD_MONOSEC && 2511 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2512 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2513 clearok = 1; 2514 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2515 op = LIST_FIRST(&owp->nfsow_open); 2516 if (op != NULL) { 2517 clearok = 0; 2518 break; 2519 } 2520 } 2521 if (clearok) { 2522 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2523 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2524 clearok = 0; 2525 break; 2526 } 2527 } 2528 } 2529 if (clearok) { 2530 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2531 LIST_REMOVE(dp, nfsdl_hash); 2532 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2533 nfscl_delegcnt--; 2534 newnfsstats.cldelegates--; 2535 } 2536 } 2537 dp = ndp; 2538 } 2539 if (igotlock) 2540 nfsv4_unlock(&clp->nfsc_lock, 0); 2541 NFSUNLOCKCLSTATE(); 2542 2543 /* 2544 * Delegreturn any delegations cleaned out or recalled. 2545 */ 2546 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2547 newnfs_copycred(&dp->nfsdl_cred, cred); 2548 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2549 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2550 FREE((caddr_t)dp, M_NFSCLDELEG); 2551 } 2552 2553 SLIST_INIT(&lfh); 2554 /* 2555 * Call nfscl_cleanupkext() once per second to check for 2556 * open/lock owners where the process has exited. 2557 */ 2558 NFSGETNANOTIME(&mytime); 2559 if (prevsec != mytime.tv_sec) { 2560 prevsec = mytime.tv_sec; 2561 nfscl_cleanupkext(clp, &lfh); 2562 } 2563 2564 /* 2565 * Do a ReleaseLockOwner for all lock owners where the 2566 * associated process no longer exists, as found by 2567 * nfscl_cleanupkext(). 2568 */ 2569 newnfs_setroot(cred); 2570 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2571 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2572 nlp) { 2573 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2574 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2575 p); 2576 nfscl_freelockowner(lp, 0); 2577 } 2578 free(lfhp, M_TEMP); 2579 } 2580 SLIST_INIT(&lfh); 2581 2582 NFSLOCKCLSTATE(); 2583 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2584 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2585 hz); 2586 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2587 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2588 NFSUNLOCKCLSTATE(); 2589 NFSFREECRED(cred); 2590 wakeup((caddr_t)clp); 2591 return; 2592 } 2593 NFSUNLOCKCLSTATE(); 2594 } 2595 } 2596 2597 /* 2598 * Initiate state recovery. Called when NFSERR_STALECLIENTID or 2599 * NFSERR_STALESTATEID is received. 2600 */ 2601 APPLESTATIC void 2602 nfscl_initiate_recovery(struct nfsclclient *clp) 2603 { 2604 2605 if (clp == NULL) 2606 return; 2607 NFSLOCKCLSTATE(); 2608 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2609 NFSUNLOCKCLSTATE(); 2610 wakeup((caddr_t)clp); 2611 } 2612 2613 /* 2614 * Dump out the state stuff for debugging. 2615 */ 2616 APPLESTATIC void 2617 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2618 int lockowner, int locks) 2619 { 2620 struct nfsclclient *clp; 2621 struct nfsclowner *owp; 2622 struct nfsclopen *op; 2623 struct nfscllockowner *lp; 2624 struct nfscllock *lop; 2625 struct nfscldeleg *dp; 2626 2627 clp = nmp->nm_clp; 2628 if (clp == NULL) { 2629 printf("nfscl dumpstate NULL clp\n"); 2630 return; 2631 } 2632 NFSLOCKCLSTATE(); 2633 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2634 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2635 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2636 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2637 owp->nfsow_owner[0], owp->nfsow_owner[1], 2638 owp->nfsow_owner[2], owp->nfsow_owner[3], 2639 owp->nfsow_seqid); 2640 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2641 if (opens) 2642 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2643 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2644 op->nfso_stateid.other[2], op->nfso_opencnt, 2645 op->nfso_fh[12]); 2646 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2647 if (lockowner) 2648 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2649 lp->nfsl_owner[0], lp->nfsl_owner[1], 2650 lp->nfsl_owner[2], lp->nfsl_owner[3], 2651 lp->nfsl_seqid, 2652 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2653 lp->nfsl_stateid.other[2]); 2654 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2655 if (locks) 2656 #ifdef __FreeBSD__ 2657 printf("lck typ=%d fst=%ju end=%ju\n", 2658 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2659 (intmax_t)lop->nfslo_end); 2660 #else 2661 printf("lck typ=%d fst=%qd end=%qd\n", 2662 lop->nfslo_type, lop->nfslo_first, 2663 lop->nfslo_end); 2664 #endif 2665 } 2666 } 2667 } 2668 } 2669 } 2670 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2671 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2672 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2673 owp->nfsow_owner[0], owp->nfsow_owner[1], 2674 owp->nfsow_owner[2], owp->nfsow_owner[3], 2675 owp->nfsow_seqid); 2676 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2677 if (opens) 2678 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2679 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2680 op->nfso_stateid.other[2], op->nfso_opencnt, 2681 op->nfso_fh[12]); 2682 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2683 if (lockowner) 2684 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2685 lp->nfsl_owner[0], lp->nfsl_owner[1], 2686 lp->nfsl_owner[2], lp->nfsl_owner[3], 2687 lp->nfsl_seqid, 2688 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2689 lp->nfsl_stateid.other[2]); 2690 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2691 if (locks) 2692 #ifdef __FreeBSD__ 2693 printf("lck typ=%d fst=%ju end=%ju\n", 2694 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2695 (intmax_t)lop->nfslo_end); 2696 #else 2697 printf("lck typ=%d fst=%qd end=%qd\n", 2698 lop->nfslo_type, lop->nfslo_first, 2699 lop->nfslo_end); 2700 #endif 2701 } 2702 } 2703 } 2704 } 2705 NFSUNLOCKCLSTATE(); 2706 } 2707 2708 /* 2709 * Check for duplicate open owners and opens. 2710 * (Only used as a diagnostic aid.) 2711 */ 2712 APPLESTATIC void 2713 nfscl_dupopen(vnode_t vp, int dupopens) 2714 { 2715 struct nfsclclient *clp; 2716 struct nfsclowner *owp, *owp2; 2717 struct nfsclopen *op, *op2; 2718 struct nfsfh *nfhp; 2719 2720 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2721 if (clp == NULL) { 2722 printf("nfscl dupopen NULL clp\n"); 2723 return; 2724 } 2725 nfhp = VTONFS(vp)->n_fhp; 2726 NFSLOCKCLSTATE(); 2727 2728 /* 2729 * First, search for duplicate owners. 2730 * These should never happen! 2731 */ 2732 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2733 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2734 if (owp != owp2 && 2735 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2736 NFSV4CL_LOCKNAMELEN)) { 2737 NFSUNLOCKCLSTATE(); 2738 printf("DUP OWNER\n"); 2739 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2740 return; 2741 } 2742 } 2743 } 2744 2745 /* 2746 * Now, search for duplicate stateids. 2747 * These shouldn't happen, either. 2748 */ 2749 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2750 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2751 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2752 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2753 if (op != op2 && 2754 (op->nfso_stateid.other[0] != 0 || 2755 op->nfso_stateid.other[1] != 0 || 2756 op->nfso_stateid.other[2] != 0) && 2757 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 2758 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 2759 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 2760 NFSUNLOCKCLSTATE(); 2761 printf("DUP STATEID\n"); 2762 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 2763 0); 2764 return; 2765 } 2766 } 2767 } 2768 } 2769 } 2770 2771 /* 2772 * Now search for duplicate opens. 2773 * Duplicate opens for the same owner 2774 * should never occur. Other duplicates are 2775 * possible and are checked for if "dupopens" 2776 * is true. 2777 */ 2778 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2779 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2780 if (nfhp->nfh_len == op2->nfso_fhlen && 2781 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 2782 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2783 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2784 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 2785 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 2786 (!NFSBCMP(op->nfso_own->nfsow_owner, 2787 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 2788 dupopens)) { 2789 if (!NFSBCMP(op->nfso_own->nfsow_owner, 2790 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 2791 NFSUNLOCKCLSTATE(); 2792 printf("BADDUP OPEN\n"); 2793 } else { 2794 NFSUNLOCKCLSTATE(); 2795 printf("DUP OPEN\n"); 2796 } 2797 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 2798 0, 0); 2799 return; 2800 } 2801 } 2802 } 2803 } 2804 } 2805 } 2806 NFSUNLOCKCLSTATE(); 2807 } 2808 2809 /* 2810 * During close, find an open that needs to be dereferenced and 2811 * dereference it. If there are no more opens for this file, 2812 * log a message to that effect. 2813 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 2814 * on the file's vnode. 2815 * This is the safe way, since it is difficult to identify 2816 * which open the close is for and I/O can be performed after the 2817 * close(2) system call when a file is mmap'd. 2818 * If it returns 0 for success, there will be a referenced 2819 * clp returned via clpp. 2820 */ 2821 APPLESTATIC int 2822 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 2823 { 2824 struct nfsclclient *clp; 2825 struct nfsclowner *owp; 2826 struct nfsclopen *op; 2827 struct nfscldeleg *dp; 2828 struct nfsfh *nfhp; 2829 int error, notdecr; 2830 2831 error = nfscl_getcl(vp, NULL, NULL, &clp); 2832 if (error) 2833 return (error); 2834 *clpp = clp; 2835 2836 nfhp = VTONFS(vp)->n_fhp; 2837 notdecr = 1; 2838 NFSLOCKCLSTATE(); 2839 /* 2840 * First, look for one under a delegation that was locally issued 2841 * and just decrement the opencnt for it. Since all my Opens against 2842 * the server are DENY_NONE, I don't see a problem with hanging 2843 * onto them. (It is much easier to use one of the extant Opens 2844 * that I already have on the server when a Delegation is recalled 2845 * than to do fresh Opens.) Someday, I might need to rethink this, but. 2846 */ 2847 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 2848 if (dp != NULL) { 2849 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2850 op = LIST_FIRST(&owp->nfsow_open); 2851 if (op != NULL) { 2852 /* 2853 * Since a delegation is for a file, there 2854 * should never be more than one open for 2855 * each openowner. 2856 */ 2857 if (LIST_NEXT(op, nfso_list) != NULL) 2858 panic("nfscdeleg opens"); 2859 if (notdecr && op->nfso_opencnt > 0) { 2860 notdecr = 0; 2861 op->nfso_opencnt--; 2862 break; 2863 } 2864 } 2865 } 2866 } 2867 2868 /* Now process the opens against the server. */ 2869 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2870 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2871 if (op->nfso_fhlen == nfhp->nfh_len && 2872 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 2873 nfhp->nfh_len)) { 2874 /* Found an open, decrement cnt if possible */ 2875 if (notdecr && op->nfso_opencnt > 0) { 2876 notdecr = 0; 2877 op->nfso_opencnt--; 2878 } 2879 /* 2880 * There are more opens, so just return. 2881 */ 2882 if (op->nfso_opencnt > 0) { 2883 NFSUNLOCKCLSTATE(); 2884 return (0); 2885 } 2886 } 2887 } 2888 } 2889 NFSUNLOCKCLSTATE(); 2890 if (notdecr) 2891 printf("nfscl: never fnd open\n"); 2892 return (0); 2893 } 2894 2895 APPLESTATIC int 2896 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 2897 { 2898 struct nfsclclient *clp; 2899 struct nfsclowner *owp, *nowp; 2900 struct nfsclopen *op; 2901 struct nfscldeleg *dp; 2902 struct nfsfh *nfhp; 2903 int error; 2904 2905 error = nfscl_getcl(vp, NULL, NULL, &clp); 2906 if (error) 2907 return (error); 2908 *clpp = clp; 2909 2910 nfhp = VTONFS(vp)->n_fhp; 2911 NFSLOCKCLSTATE(); 2912 /* 2913 * First get rid of the local Open structures, which should be no 2914 * longer in use. 2915 */ 2916 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 2917 if (dp != NULL) { 2918 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 2919 op = LIST_FIRST(&owp->nfsow_open); 2920 if (op != NULL) { 2921 KASSERT((op->nfso_opencnt == 0), 2922 ("nfscl: bad open cnt on deleg")); 2923 nfscl_freeopen(op, 1); 2924 } 2925 nfscl_freeopenowner(owp, 1); 2926 } 2927 } 2928 2929 /* Now process the opens against the server. */ 2930 lookformore: 2931 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2932 op = LIST_FIRST(&owp->nfsow_open); 2933 while (op != NULL) { 2934 if (op->nfso_fhlen == nfhp->nfh_len && 2935 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 2936 nfhp->nfh_len)) { 2937 /* Found an open, close it. */ 2938 KASSERT((op->nfso_opencnt == 0), 2939 ("nfscl: bad open cnt on server")); 2940 NFSUNLOCKCLSTATE(); 2941 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 2942 p); 2943 NFSLOCKCLSTATE(); 2944 goto lookformore; 2945 } 2946 op = LIST_NEXT(op, nfso_list); 2947 } 2948 } 2949 NFSUNLOCKCLSTATE(); 2950 return (0); 2951 } 2952 2953 /* 2954 * Return all delegations on this client. 2955 * (Must be called with client sleep lock.) 2956 */ 2957 static void 2958 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 2959 { 2960 struct nfscldeleg *dp, *ndp; 2961 struct ucred *cred; 2962 2963 cred = newnfs_getcred(); 2964 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 2965 nfscl_cleandeleg(dp); 2966 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2967 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2968 } 2969 NFSFREECRED(cred); 2970 } 2971 2972 /* 2973 * Do a callback RPC. 2974 */ 2975 APPLESTATIC void 2976 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 2977 { 2978 int i, op; 2979 u_int32_t *tl; 2980 struct nfsclclient *clp; 2981 struct nfscldeleg *dp = NULL; 2982 int numops, taglen = -1, error = 0, trunc, ret = 0; 2983 u_int32_t minorvers, retops = 0, *retopsp = NULL, *repp, cbident; 2984 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 2985 vnode_t vp = NULL; 2986 struct nfsnode *np; 2987 struct vattr va; 2988 struct nfsfh *nfhp; 2989 mount_t mp; 2990 nfsattrbit_t attrbits, rattrbits; 2991 nfsv4stateid_t stateid; 2992 2993 nfsrvd_rephead(nd); 2994 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2995 taglen = fxdr_unsigned(int, *tl); 2996 if (taglen < 0) { 2997 error = EBADRPC; 2998 goto nfsmout; 2999 } 3000 if (taglen <= NFSV4_SMALLSTR) 3001 tagstr = tag; 3002 else 3003 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3004 error = nfsrv_mtostr(nd, tagstr, taglen); 3005 if (error) { 3006 if (taglen > NFSV4_SMALLSTR) 3007 free(tagstr, M_TEMP); 3008 taglen = -1; 3009 goto nfsmout; 3010 } 3011 (void) nfsm_strtom(nd, tag, taglen); 3012 if (taglen > NFSV4_SMALLSTR) { 3013 free(tagstr, M_TEMP); 3014 } 3015 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3016 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3017 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3018 if (minorvers != NFSV4_MINORVERSION) 3019 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3020 cbident = fxdr_unsigned(u_int32_t, *tl++); 3021 if (nd->nd_repstat) 3022 numops = 0; 3023 else 3024 numops = fxdr_unsigned(int, *tl); 3025 /* 3026 * Loop around doing the sub ops. 3027 */ 3028 for (i = 0; i < numops; i++) { 3029 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3030 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3031 *repp++ = *tl; 3032 op = fxdr_unsigned(int, *tl); 3033 if (op < NFSV4OP_CBGETATTR || op > NFSV4OP_CBRECALL) { 3034 nd->nd_repstat = NFSERR_OPILLEGAL; 3035 *repp = nfscl_errmap(nd); 3036 retops++; 3037 break; 3038 } 3039 nd->nd_procnum = op; 3040 newnfsstats.cbrpccnt[nd->nd_procnum]++; 3041 switch (op) { 3042 case NFSV4OP_CBGETATTR: 3043 clp = NULL; 3044 error = nfsm_getfh(nd, &nfhp); 3045 if (!error) 3046 error = nfsrv_getattrbits(nd, &attrbits, 3047 NULL, NULL); 3048 if (!error) { 3049 mp = nfscl_getmnt(cbident); 3050 if (mp == NULL) 3051 error = NFSERR_SERVERFAULT; 3052 } 3053 if (!error) { 3054 dp = NULL; 3055 NFSLOCKCLSTATE(); 3056 clp = nfscl_findcl(VFSTONFS(mp)); 3057 if (clp != NULL) 3058 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3059 nfhp->nfh_len); 3060 NFSUNLOCKCLSTATE(); 3061 if (dp == NULL) 3062 error = NFSERR_SERVERFAULT; 3063 } 3064 if (!error) { 3065 ret = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3066 nfhp->nfh_len, p, &np); 3067 if (!ret) 3068 vp = NFSTOV(np); 3069 } 3070 if (nfhp != NULL) 3071 FREE((caddr_t)nfhp, M_NFSFH); 3072 if (!error) { 3073 NFSZERO_ATTRBIT(&rattrbits); 3074 if (NFSISSET_ATTRBIT(&attrbits, 3075 NFSATTRBIT_SIZE)) { 3076 if (!ret) 3077 va.va_size = np->n_size; 3078 else 3079 va.va_size = dp->nfsdl_size; 3080 NFSSETBIT_ATTRBIT(&rattrbits, 3081 NFSATTRBIT_SIZE); 3082 } 3083 if (NFSISSET_ATTRBIT(&attrbits, 3084 NFSATTRBIT_CHANGE)) { 3085 va.va_filerev = dp->nfsdl_change; 3086 if (ret || (np->n_flag & NDELEGMOD)) 3087 va.va_filerev++; 3088 NFSSETBIT_ATTRBIT(&rattrbits, 3089 NFSATTRBIT_CHANGE); 3090 } 3091 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3092 NULL, 0, &rattrbits, NULL, NULL, 0, 0, 0, 0, 3093 (uint64_t)0); 3094 if (!ret) 3095 vrele(vp); 3096 } 3097 break; 3098 case NFSV4OP_CBRECALL: 3099 clp = NULL; 3100 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3101 NFSX_UNSIGNED); 3102 stateid.seqid = *tl++; 3103 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3104 NFSX_STATEIDOTHER); 3105 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3106 trunc = fxdr_unsigned(int, *tl); 3107 error = nfsm_getfh(nd, &nfhp); 3108 if (!error) { 3109 mp = nfscl_getmnt(cbident); 3110 if (mp == NULL) 3111 error = NFSERR_SERVERFAULT; 3112 } 3113 if (!error) { 3114 NFSLOCKCLSTATE(); 3115 clp = nfscl_findcl(VFSTONFS(mp)); 3116 if (clp != NULL) { 3117 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3118 nfhp->nfh_len); 3119 if (dp != NULL && (dp->nfsdl_flags & 3120 NFSCLDL_DELEGRET) == 0) { 3121 dp->nfsdl_flags |= 3122 NFSCLDL_RECALL; 3123 wakeup((caddr_t)clp); 3124 } 3125 } else { 3126 error = NFSERR_SERVERFAULT; 3127 } 3128 NFSUNLOCKCLSTATE(); 3129 } 3130 if (nfhp != NULL) 3131 FREE((caddr_t)nfhp, M_NFSFH); 3132 break; 3133 }; 3134 if (error) { 3135 if (error == EBADRPC || error == NFSERR_BADXDR) { 3136 nd->nd_repstat = NFSERR_BADXDR; 3137 } else { 3138 nd->nd_repstat = error; 3139 } 3140 error = 0; 3141 } 3142 retops++; 3143 if (nd->nd_repstat) { 3144 *repp = nfscl_errmap(nd); 3145 break; 3146 } else 3147 *repp = 0; /* NFS4_OK */ 3148 } 3149 nfsmout: 3150 if (error) { 3151 if (error == EBADRPC || error == NFSERR_BADXDR) 3152 nd->nd_repstat = NFSERR_BADXDR; 3153 else 3154 printf("nfsv4 comperr1=%d\n", error); 3155 } 3156 if (taglen == -1) { 3157 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3158 *tl++ = 0; 3159 *tl = 0; 3160 } else { 3161 *retopsp = txdr_unsigned(retops); 3162 } 3163 *nd->nd_errp = nfscl_errmap(nd); 3164 } 3165 3166 /* 3167 * Generate the next cbident value. Basically just increment a static value 3168 * and then check that it isn't already in the list, if it has wrapped around. 3169 */ 3170 static u_int32_t 3171 nfscl_nextcbident(void) 3172 { 3173 struct nfsclclient *clp; 3174 int matched; 3175 static u_int32_t nextcbident = 0; 3176 static int haswrapped = 0; 3177 3178 nextcbident++; 3179 if (nextcbident == 0) 3180 haswrapped = 1; 3181 if (haswrapped) { 3182 /* 3183 * Search the clientid list for one already using this cbident. 3184 */ 3185 do { 3186 matched = 0; 3187 NFSLOCKCLSTATE(); 3188 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3189 if (clp->nfsc_cbident == nextcbident) { 3190 matched = 1; 3191 break; 3192 } 3193 } 3194 NFSUNLOCKCLSTATE(); 3195 if (matched == 1) 3196 nextcbident++; 3197 } while (matched); 3198 } 3199 return (nextcbident); 3200 } 3201 3202 /* 3203 * Get the mount point related to a given cbident. 3204 */ 3205 static mount_t 3206 nfscl_getmnt(u_int32_t cbident) 3207 { 3208 struct nfsclclient *clp; 3209 struct nfsmount *nmp; 3210 3211 NFSLOCKCLSTATE(); 3212 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3213 if (clp->nfsc_cbident == cbident) 3214 break; 3215 } 3216 if (clp == NULL) { 3217 NFSUNLOCKCLSTATE(); 3218 return (NULL); 3219 } 3220 nmp = clp->nfsc_nmp; 3221 NFSUNLOCKCLSTATE(); 3222 return (nmp->nm_mountp); 3223 } 3224 3225 /* 3226 * Search for a lock conflict locally on the client. A conflict occurs if 3227 * - not same owner and overlapping byte range and at least one of them is 3228 * a write lock or this is an unlock. 3229 */ 3230 static int 3231 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3232 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3233 struct nfscllock **lopp) 3234 { 3235 struct nfsclowner *owp; 3236 struct nfsclopen *op; 3237 int ret; 3238 3239 if (dp != NULL) { 3240 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3241 if (ret) 3242 return (ret); 3243 } 3244 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3245 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3246 if (op->nfso_fhlen == fhlen && 3247 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3248 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3249 own, lopp); 3250 if (ret) 3251 return (ret); 3252 } 3253 } 3254 } 3255 return (0); 3256 } 3257 3258 static int 3259 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3260 u_int8_t *own, struct nfscllock **lopp) 3261 { 3262 struct nfscllockowner *lp; 3263 struct nfscllock *lop; 3264 3265 LIST_FOREACH(lp, lhp, nfsl_list) { 3266 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3267 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3268 if (lop->nfslo_first >= nlop->nfslo_end) 3269 break; 3270 if (lop->nfslo_end <= nlop->nfslo_first) 3271 continue; 3272 if (lop->nfslo_type == F_WRLCK || 3273 nlop->nfslo_type == F_WRLCK || 3274 nlop->nfslo_type == F_UNLCK) { 3275 if (lopp != NULL) 3276 *lopp = lop; 3277 return (NFSERR_DENIED); 3278 } 3279 } 3280 } 3281 } 3282 return (0); 3283 } 3284 3285 /* 3286 * Check for a local conflicting lock. 3287 */ 3288 APPLESTATIC int 3289 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3290 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3291 { 3292 struct nfscllock *lop, nlck; 3293 struct nfscldeleg *dp; 3294 struct nfsnode *np; 3295 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3296 int error; 3297 3298 nlck.nfslo_type = fl->l_type; 3299 nlck.nfslo_first = off; 3300 if (len == NFS64BITSSET) { 3301 nlck.nfslo_end = NFS64BITSSET; 3302 } else { 3303 nlck.nfslo_end = off + len; 3304 if (nlck.nfslo_end <= nlck.nfslo_first) 3305 return (NFSERR_INVAL); 3306 } 3307 np = VTONFS(vp); 3308 nfscl_filllockowner(id, own, flags); 3309 NFSLOCKCLSTATE(); 3310 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3311 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3312 &nlck, own, dp, &lop); 3313 if (error != 0) { 3314 fl->l_whence = SEEK_SET; 3315 fl->l_start = lop->nfslo_first; 3316 if (lop->nfslo_end == NFS64BITSSET) 3317 fl->l_len = 0; 3318 else 3319 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3320 fl->l_pid = (pid_t)0; 3321 fl->l_type = lop->nfslo_type; 3322 error = -1; /* no RPC required */ 3323 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3324 fl->l_type == F_RDLCK)) { 3325 /* 3326 * The delegation ensures that there isn't a conflicting 3327 * lock on the server, so return -1 to indicate an RPC 3328 * isn't required. 3329 */ 3330 fl->l_type = F_UNLCK; 3331 error = -1; 3332 } 3333 NFSUNLOCKCLSTATE(); 3334 return (error); 3335 } 3336 3337 /* 3338 * Handle Recall of a delegation. 3339 * The clp must be exclusive locked when this is called. 3340 */ 3341 static int 3342 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3343 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3344 int called_from_renewthread) 3345 { 3346 struct nfsclowner *owp, *lowp, *nowp; 3347 struct nfsclopen *op, *lop; 3348 struct nfscllockowner *lp; 3349 struct nfscllock *lckp; 3350 struct nfsnode *np; 3351 int error = 0, ret, gotvp = 0; 3352 3353 if (vp == NULL) { 3354 /* 3355 * First, get a vnode for the file. This is needed to do RPCs. 3356 */ 3357 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3358 dp->nfsdl_fhlen, p, &np); 3359 if (ret) { 3360 /* 3361 * File isn't open, so nothing to move over to the 3362 * server. 3363 */ 3364 return (0); 3365 } 3366 vp = NFSTOV(np); 3367 gotvp = 1; 3368 } else { 3369 np = VTONFS(vp); 3370 } 3371 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3372 3373 /* 3374 * Ok, if it's a write delegation, flush data to the server, so 3375 * that close/open consistency is retained. 3376 */ 3377 ret = 0; 3378 NFSLOCKNODE(np); 3379 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3380 np->n_flag |= NDELEGRECALL; 3381 NFSUNLOCKNODE(np); 3382 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1, 3383 called_from_renewthread); 3384 NFSLOCKNODE(np); 3385 np->n_flag &= ~NDELEGRECALL; 3386 } 3387 NFSINVALATTRCACHE(np); 3388 NFSUNLOCKNODE(np); 3389 if (ret == EIO && called_from_renewthread != 0) { 3390 /* 3391 * If the flush failed with EIO for the renew thread, 3392 * return now, so that the dirty buffer will be flushed 3393 * later. 3394 */ 3395 if (gotvp != 0) 3396 vrele(vp); 3397 return (ret); 3398 } 3399 3400 /* 3401 * Now, for each openowner with opens issued locally, move them 3402 * over to state against the server. 3403 */ 3404 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3405 lop = LIST_FIRST(&lowp->nfsow_open); 3406 if (lop != NULL) { 3407 if (LIST_NEXT(lop, nfso_list) != NULL) 3408 panic("nfsdlg mult opens"); 3409 /* 3410 * Look for the same openowner against the server. 3411 */ 3412 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3413 if (!NFSBCMP(lowp->nfsow_owner, 3414 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3415 newnfs_copycred(&dp->nfsdl_cred, cred); 3416 ret = nfscl_moveopen(vp, clp, nmp, lop, 3417 owp, dp, cred, p); 3418 if (ret == NFSERR_STALECLIENTID || 3419 ret == NFSERR_STALEDONTRECOVER) { 3420 if (gotvp) 3421 vrele(vp); 3422 return (ret); 3423 } 3424 if (ret) { 3425 nfscl_freeopen(lop, 1); 3426 if (!error) 3427 error = ret; 3428 } 3429 break; 3430 } 3431 } 3432 3433 /* 3434 * If no openowner found, create one and get an open 3435 * for it. 3436 */ 3437 if (owp == NULL) { 3438 MALLOC(nowp, struct nfsclowner *, 3439 sizeof (struct nfsclowner), M_NFSCLOWNER, 3440 M_WAITOK); 3441 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3442 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3443 dp->nfsdl_fhlen, NULL); 3444 newnfs_copycred(&dp->nfsdl_cred, cred); 3445 ret = nfscl_moveopen(vp, clp, nmp, lop, 3446 owp, dp, cred, p); 3447 if (ret) { 3448 nfscl_freeopenowner(owp, 0); 3449 if (ret == NFSERR_STALECLIENTID || 3450 ret == NFSERR_STALEDONTRECOVER) { 3451 if (gotvp) 3452 vrele(vp); 3453 return (ret); 3454 } 3455 if (ret) { 3456 nfscl_freeopen(lop, 1); 3457 if (!error) 3458 error = ret; 3459 } 3460 } 3461 } 3462 } 3463 } 3464 3465 /* 3466 * Now, get byte range locks for any locks done locally. 3467 */ 3468 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3469 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 3470 newnfs_copycred(&dp->nfsdl_cred, cred); 3471 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 3472 if (ret == NFSERR_STALESTATEID || 3473 ret == NFSERR_STALEDONTRECOVER || 3474 ret == NFSERR_STALECLIENTID) { 3475 if (gotvp) 3476 vrele(vp); 3477 return (ret); 3478 } 3479 if (ret && !error) 3480 error = ret; 3481 } 3482 } 3483 if (gotvp) 3484 vrele(vp); 3485 return (error); 3486 } 3487 3488 /* 3489 * Move a locally issued open over to an owner on the state list. 3490 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 3491 * returns with it unlocked. 3492 */ 3493 static int 3494 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3495 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 3496 struct ucred *cred, NFSPROC_T *p) 3497 { 3498 struct nfsclopen *op, *nop; 3499 struct nfscldeleg *ndp; 3500 struct nfsnode *np; 3501 int error = 0, newone; 3502 3503 /* 3504 * First, look for an appropriate open, If found, just increment the 3505 * opencnt in it. 3506 */ 3507 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3508 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 3509 op->nfso_fhlen == lop->nfso_fhlen && 3510 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 3511 op->nfso_opencnt += lop->nfso_opencnt; 3512 nfscl_freeopen(lop, 1); 3513 return (0); 3514 } 3515 } 3516 3517 /* No appropriate open, so we have to do one against the server. */ 3518 np = VTONFS(vp); 3519 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 3520 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 3521 newone = 0; 3522 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 3523 lop->nfso_fh, lop->nfso_fhlen, &newone); 3524 ndp = dp; 3525 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 3526 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 3527 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 3528 if (error) { 3529 if (newone) 3530 nfscl_freeopen(op, 0); 3531 } else { 3532 if (newone) 3533 newnfs_copyincred(cred, &op->nfso_cred); 3534 op->nfso_mode |= lop->nfso_mode; 3535 op->nfso_opencnt += lop->nfso_opencnt; 3536 nfscl_freeopen(lop, 1); 3537 } 3538 if (nop != NULL) 3539 FREE((caddr_t)nop, M_NFSCLOPEN); 3540 if (ndp != NULL) { 3541 /* 3542 * What should I do with the returned delegation, since the 3543 * delegation is being recalled? For now, just printf and 3544 * through it away. 3545 */ 3546 printf("Moveopen returned deleg\n"); 3547 FREE((caddr_t)ndp, M_NFSCLDELEG); 3548 } 3549 return (error); 3550 } 3551 3552 /* 3553 * Recall all delegations on this client. 3554 */ 3555 static void 3556 nfscl_totalrecall(struct nfsclclient *clp) 3557 { 3558 struct nfscldeleg *dp; 3559 3560 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 3561 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 3562 dp->nfsdl_flags |= NFSCLDL_RECALL; 3563 } 3564 } 3565 3566 /* 3567 * Relock byte ranges. Called for delegation recall and state expiry. 3568 */ 3569 static int 3570 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3571 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 3572 NFSPROC_T *p) 3573 { 3574 struct nfscllockowner *nlp; 3575 struct nfsfh *nfhp; 3576 u_int64_t off, len; 3577 u_int32_t clidrev = 0; 3578 int error, newone, donelocally; 3579 3580 off = lop->nfslo_first; 3581 len = lop->nfslo_end - lop->nfslo_first; 3582 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 3583 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 3584 lp->nfsl_openowner, &nlp, &newone, &donelocally); 3585 if (error || donelocally) 3586 return (error); 3587 if (nmp->nm_clp != NULL) 3588 clidrev = nmp->nm_clp->nfsc_clientidrev; 3589 else 3590 clidrev = 0; 3591 nfhp = VTONFS(vp)->n_fhp; 3592 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 3593 nfhp->nfh_len, nlp, newone, 0, off, 3594 len, lop->nfslo_type, cred, p); 3595 if (error) 3596 nfscl_freelockowner(nlp, 0); 3597 return (error); 3598 } 3599 3600 /* 3601 * Called to re-open a file. Basically get a vnode for the file handle 3602 * and then call nfsrpc_openrpc() to do the rest. 3603 */ 3604 static int 3605 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 3606 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 3607 struct ucred *cred, NFSPROC_T *p) 3608 { 3609 struct nfsnode *np; 3610 vnode_t vp; 3611 int error; 3612 3613 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 3614 if (error) 3615 return (error); 3616 vp = NFSTOV(np); 3617 if (np->n_v4 != NULL) { 3618 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 3619 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 3620 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 3621 cred, p); 3622 } else { 3623 error = EINVAL; 3624 } 3625 vrele(vp); 3626 return (error); 3627 } 3628 3629 /* 3630 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 3631 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 3632 * fail. 3633 */ 3634 static int 3635 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 3636 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 3637 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 3638 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 3639 { 3640 int error; 3641 3642 do { 3643 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 3644 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 3645 0, 0); 3646 if (error == NFSERR_DELAY) 3647 (void) nfs_catnap(PZERO, error, "nfstryop"); 3648 } while (error == NFSERR_DELAY); 3649 if (error == EAUTH || error == EACCES) { 3650 /* Try again using system credentials */ 3651 newnfs_setroot(cred); 3652 do { 3653 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 3654 newfhlen, mode, op, name, namelen, ndpp, reclaim, 3655 delegtype, cred, p, 1, 0); 3656 if (error == NFSERR_DELAY) 3657 (void) nfs_catnap(PZERO, error, "nfstryop"); 3658 } while (error == NFSERR_DELAY); 3659 } 3660 return (error); 3661 } 3662 3663 /* 3664 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 3665 * NFSERR_DELAY. Also, retry with system credentials, if the provided 3666 * cred don't work. 3667 */ 3668 static int 3669 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 3670 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 3671 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 3672 { 3673 struct nfsrv_descript nfsd, *nd = &nfsd; 3674 int error; 3675 3676 do { 3677 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 3678 reclaim, off, len, type, cred, p, 0); 3679 if (!error && nd->nd_repstat == NFSERR_DELAY) 3680 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 3681 "nfstrylck"); 3682 } while (!error && nd->nd_repstat == NFSERR_DELAY); 3683 if (!error) 3684 error = nd->nd_repstat; 3685 if (error == EAUTH || error == EACCES) { 3686 /* Try again using root credentials */ 3687 newnfs_setroot(cred); 3688 do { 3689 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 3690 newone, reclaim, off, len, type, cred, p, 1); 3691 if (!error && nd->nd_repstat == NFSERR_DELAY) 3692 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 3693 "nfstrylck"); 3694 } while (!error && nd->nd_repstat == NFSERR_DELAY); 3695 if (!error) 3696 error = nd->nd_repstat; 3697 } 3698 return (error); 3699 } 3700 3701 /* 3702 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 3703 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 3704 * credentials fail. 3705 */ 3706 static int 3707 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 3708 struct nfsmount *nmp, NFSPROC_T *p) 3709 { 3710 int error; 3711 3712 do { 3713 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 3714 if (error == NFSERR_DELAY) 3715 (void) nfs_catnap(PZERO, error, "nfstrydp"); 3716 } while (error == NFSERR_DELAY); 3717 if (error == EAUTH || error == EACCES) { 3718 /* Try again using system credentials */ 3719 newnfs_setroot(cred); 3720 do { 3721 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 3722 if (error == NFSERR_DELAY) 3723 (void) nfs_catnap(PZERO, error, "nfstrydp"); 3724 } while (error == NFSERR_DELAY); 3725 } 3726 return (error); 3727 } 3728 3729 /* 3730 * Try a close against the server. Just call nfsrpc_closerpc(), 3731 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 3732 * credentials fail. 3733 */ 3734 APPLESTATIC int 3735 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 3736 struct nfsmount *nmp, NFSPROC_T *p) 3737 { 3738 struct nfsrv_descript nfsd, *nd = &nfsd; 3739 int error; 3740 3741 do { 3742 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 3743 if (error == NFSERR_DELAY) 3744 (void) nfs_catnap(PZERO, error, "nfstrycl"); 3745 } while (error == NFSERR_DELAY); 3746 if (error == EAUTH || error == EACCES) { 3747 /* Try again using system credentials */ 3748 newnfs_setroot(cred); 3749 do { 3750 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 3751 if (error == NFSERR_DELAY) 3752 (void) nfs_catnap(PZERO, error, "nfstrycl"); 3753 } while (error == NFSERR_DELAY); 3754 } 3755 return (error); 3756 } 3757 3758 /* 3759 * Decide if a delegation on a file permits close without flushing writes 3760 * to the server. This might be a big performance win in some environments. 3761 * (Not useful until the client does caching on local stable storage.) 3762 */ 3763 APPLESTATIC int 3764 nfscl_mustflush(vnode_t vp) 3765 { 3766 struct nfsclclient *clp; 3767 struct nfscldeleg *dp; 3768 struct nfsnode *np; 3769 struct nfsmount *nmp; 3770 3771 np = VTONFS(vp); 3772 nmp = VFSTONFS(vnode_mount(vp)); 3773 if (!NFSHASNFSV4(nmp)) 3774 return (1); 3775 NFSLOCKCLSTATE(); 3776 clp = nfscl_findcl(nmp); 3777 if (clp == NULL) { 3778 NFSUNLOCKCLSTATE(); 3779 return (1); 3780 } 3781 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3782 if (dp != NULL && (dp->nfsdl_flags & 3783 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 3784 NFSCLDL_WRITE && 3785 (dp->nfsdl_sizelimit >= np->n_size || 3786 !NFSHASSTRICT3530(nmp))) { 3787 NFSUNLOCKCLSTATE(); 3788 return (0); 3789 } 3790 NFSUNLOCKCLSTATE(); 3791 return (1); 3792 } 3793 3794 /* 3795 * See if a (write) delegation exists for this file. 3796 */ 3797 APPLESTATIC int 3798 nfscl_nodeleg(vnode_t vp, int writedeleg) 3799 { 3800 struct nfsclclient *clp; 3801 struct nfscldeleg *dp; 3802 struct nfsnode *np; 3803 struct nfsmount *nmp; 3804 3805 np = VTONFS(vp); 3806 nmp = VFSTONFS(vnode_mount(vp)); 3807 if (!NFSHASNFSV4(nmp)) 3808 return (1); 3809 NFSLOCKCLSTATE(); 3810 clp = nfscl_findcl(nmp); 3811 if (clp == NULL) { 3812 NFSUNLOCKCLSTATE(); 3813 return (1); 3814 } 3815 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3816 if (dp != NULL && 3817 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 3818 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 3819 NFSCLDL_WRITE)) { 3820 NFSUNLOCKCLSTATE(); 3821 return (0); 3822 } 3823 NFSUNLOCKCLSTATE(); 3824 return (1); 3825 } 3826 3827 /* 3828 * Look for an associated delegation that should be DelegReturned. 3829 */ 3830 APPLESTATIC int 3831 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 3832 { 3833 struct nfsclclient *clp; 3834 struct nfscldeleg *dp; 3835 struct nfsclowner *owp; 3836 struct nfscllockowner *lp; 3837 struct nfsmount *nmp; 3838 struct ucred *cred; 3839 struct nfsnode *np; 3840 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 3841 3842 nmp = VFSTONFS(vnode_mount(vp)); 3843 np = VTONFS(vp); 3844 NFSLOCKCLSTATE(); 3845 /* 3846 * Loop around waiting for: 3847 * - outstanding I/O operations on delegations to complete 3848 * - for a delegation on vp that has state, lock the client and 3849 * do a recall 3850 * - return delegation with no state 3851 */ 3852 while (1) { 3853 clp = nfscl_findcl(nmp); 3854 if (clp == NULL) { 3855 NFSUNLOCKCLSTATE(); 3856 return (retcnt); 3857 } 3858 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3859 np->n_fhp->nfh_len); 3860 if (dp != NULL) { 3861 /* 3862 * Wait for outstanding I/O ops to be done. 3863 */ 3864 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3865 if (igotlock) { 3866 nfsv4_unlock(&clp->nfsc_lock, 0); 3867 igotlock = 0; 3868 } 3869 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3870 (void) nfsmsleep(&dp->nfsdl_rwlock, 3871 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3872 continue; 3873 } 3874 needsrecall = 0; 3875 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3876 if (!LIST_EMPTY(&owp->nfsow_open)) { 3877 needsrecall = 1; 3878 break; 3879 } 3880 } 3881 if (!needsrecall) { 3882 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3883 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3884 needsrecall = 1; 3885 break; 3886 } 3887 } 3888 } 3889 if (needsrecall && !triedrecall) { 3890 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 3891 islept = 0; 3892 while (!igotlock) { 3893 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 3894 &islept, NFSCLSTATEMUTEXPTR, NULL); 3895 if (islept) 3896 break; 3897 } 3898 if (islept) 3899 continue; 3900 NFSUNLOCKCLSTATE(); 3901 cred = newnfs_getcred(); 3902 newnfs_copycred(&dp->nfsdl_cred, cred); 3903 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 3904 NFSFREECRED(cred); 3905 triedrecall = 1; 3906 NFSLOCKCLSTATE(); 3907 nfsv4_unlock(&clp->nfsc_lock, 0); 3908 igotlock = 0; 3909 continue; 3910 } 3911 *stp = dp->nfsdl_stateid; 3912 retcnt = 1; 3913 nfscl_cleandeleg(dp); 3914 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3915 } 3916 if (igotlock) 3917 nfsv4_unlock(&clp->nfsc_lock, 0); 3918 NFSUNLOCKCLSTATE(); 3919 return (retcnt); 3920 } 3921 } 3922 3923 /* 3924 * Look for associated delegation(s) that should be DelegReturned. 3925 */ 3926 APPLESTATIC int 3927 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 3928 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 3929 { 3930 struct nfsclclient *clp; 3931 struct nfscldeleg *dp; 3932 struct nfsclowner *owp; 3933 struct nfscllockowner *lp; 3934 struct nfsmount *nmp; 3935 struct ucred *cred; 3936 struct nfsnode *np; 3937 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 3938 3939 nmp = VFSTONFS(vnode_mount(fvp)); 3940 *gotfdp = 0; 3941 *gottdp = 0; 3942 NFSLOCKCLSTATE(); 3943 /* 3944 * Loop around waiting for: 3945 * - outstanding I/O operations on delegations to complete 3946 * - for a delegation on fvp that has state, lock the client and 3947 * do a recall 3948 * - return delegation(s) with no state. 3949 */ 3950 while (1) { 3951 clp = nfscl_findcl(nmp); 3952 if (clp == NULL) { 3953 NFSUNLOCKCLSTATE(); 3954 return (retcnt); 3955 } 3956 np = VTONFS(fvp); 3957 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3958 np->n_fhp->nfh_len); 3959 if (dp != NULL && *gotfdp == 0) { 3960 /* 3961 * Wait for outstanding I/O ops to be done. 3962 */ 3963 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 3964 if (igotlock) { 3965 nfsv4_unlock(&clp->nfsc_lock, 0); 3966 igotlock = 0; 3967 } 3968 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 3969 (void) nfsmsleep(&dp->nfsdl_rwlock, 3970 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 3971 continue; 3972 } 3973 needsrecall = 0; 3974 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3975 if (!LIST_EMPTY(&owp->nfsow_open)) { 3976 needsrecall = 1; 3977 break; 3978 } 3979 } 3980 if (!needsrecall) { 3981 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3982 if (!LIST_EMPTY(&lp->nfsl_lock)) { 3983 needsrecall = 1; 3984 break; 3985 } 3986 } 3987 } 3988 if (needsrecall && !triedrecall) { 3989 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 3990 islept = 0; 3991 while (!igotlock) { 3992 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 3993 &islept, NFSCLSTATEMUTEXPTR, NULL); 3994 if (islept) 3995 break; 3996 } 3997 if (islept) 3998 continue; 3999 NFSUNLOCKCLSTATE(); 4000 cred = newnfs_getcred(); 4001 newnfs_copycred(&dp->nfsdl_cred, cred); 4002 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4003 NFSFREECRED(cred); 4004 triedrecall = 1; 4005 NFSLOCKCLSTATE(); 4006 nfsv4_unlock(&clp->nfsc_lock, 0); 4007 igotlock = 0; 4008 continue; 4009 } 4010 *fstp = dp->nfsdl_stateid; 4011 retcnt++; 4012 *gotfdp = 1; 4013 nfscl_cleandeleg(dp); 4014 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4015 } 4016 if (igotlock) { 4017 nfsv4_unlock(&clp->nfsc_lock, 0); 4018 igotlock = 0; 4019 } 4020 if (tvp != NULL) { 4021 np = VTONFS(tvp); 4022 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4023 np->n_fhp->nfh_len); 4024 if (dp != NULL && *gottdp == 0) { 4025 /* 4026 * Wait for outstanding I/O ops to be done. 4027 */ 4028 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4029 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4030 (void) nfsmsleep(&dp->nfsdl_rwlock, 4031 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4032 continue; 4033 } 4034 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4035 if (!LIST_EMPTY(&owp->nfsow_open)) { 4036 NFSUNLOCKCLSTATE(); 4037 return (retcnt); 4038 } 4039 } 4040 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4041 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4042 NFSUNLOCKCLSTATE(); 4043 return (retcnt); 4044 } 4045 } 4046 *tstp = dp->nfsdl_stateid; 4047 retcnt++; 4048 *gottdp = 1; 4049 nfscl_cleandeleg(dp); 4050 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4051 } 4052 } 4053 NFSUNLOCKCLSTATE(); 4054 return (retcnt); 4055 } 4056 } 4057 4058 /* 4059 * Get a reference on the clientid associated with the mount point. 4060 * Return 1 if success, 0 otherwise. 4061 */ 4062 APPLESTATIC int 4063 nfscl_getref(struct nfsmount *nmp) 4064 { 4065 struct nfsclclient *clp; 4066 4067 NFSLOCKCLSTATE(); 4068 clp = nfscl_findcl(nmp); 4069 if (clp == NULL) { 4070 NFSUNLOCKCLSTATE(); 4071 return (0); 4072 } 4073 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4074 NFSUNLOCKCLSTATE(); 4075 return (1); 4076 } 4077 4078 /* 4079 * Release a reference on a clientid acquired with the above call. 4080 */ 4081 APPLESTATIC void 4082 nfscl_relref(struct nfsmount *nmp) 4083 { 4084 struct nfsclclient *clp; 4085 4086 NFSLOCKCLSTATE(); 4087 clp = nfscl_findcl(nmp); 4088 if (clp == NULL) { 4089 NFSUNLOCKCLSTATE(); 4090 return; 4091 } 4092 nfsv4_relref(&clp->nfsc_lock); 4093 NFSUNLOCKCLSTATE(); 4094 } 4095 4096 /* 4097 * Save the size attribute in the delegation, since the nfsnode 4098 * is going away. 4099 */ 4100 APPLESTATIC void 4101 nfscl_reclaimnode(vnode_t vp) 4102 { 4103 struct nfsclclient *clp; 4104 struct nfscldeleg *dp; 4105 struct nfsnode *np = VTONFS(vp); 4106 struct nfsmount *nmp; 4107 4108 nmp = VFSTONFS(vnode_mount(vp)); 4109 if (!NFSHASNFSV4(nmp)) 4110 return; 4111 NFSLOCKCLSTATE(); 4112 clp = nfscl_findcl(nmp); 4113 if (clp == NULL) { 4114 NFSUNLOCKCLSTATE(); 4115 return; 4116 } 4117 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4118 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4119 dp->nfsdl_size = np->n_size; 4120 NFSUNLOCKCLSTATE(); 4121 } 4122 4123 /* 4124 * Get the saved size attribute in the delegation, since it is a 4125 * newly allocated nfsnode. 4126 */ 4127 APPLESTATIC void 4128 nfscl_newnode(vnode_t vp) 4129 { 4130 struct nfsclclient *clp; 4131 struct nfscldeleg *dp; 4132 struct nfsnode *np = VTONFS(vp); 4133 struct nfsmount *nmp; 4134 4135 nmp = VFSTONFS(vnode_mount(vp)); 4136 if (!NFSHASNFSV4(nmp)) 4137 return; 4138 NFSLOCKCLSTATE(); 4139 clp = nfscl_findcl(nmp); 4140 if (clp == NULL) { 4141 NFSUNLOCKCLSTATE(); 4142 return; 4143 } 4144 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4145 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4146 np->n_size = dp->nfsdl_size; 4147 NFSUNLOCKCLSTATE(); 4148 } 4149 4150 /* 4151 * If there is a valid write delegation for this file, set the modtime 4152 * to the local clock time. 4153 */ 4154 APPLESTATIC void 4155 nfscl_delegmodtime(vnode_t vp) 4156 { 4157 struct nfsclclient *clp; 4158 struct nfscldeleg *dp; 4159 struct nfsnode *np = VTONFS(vp); 4160 struct nfsmount *nmp; 4161 4162 nmp = VFSTONFS(vnode_mount(vp)); 4163 if (!NFSHASNFSV4(nmp)) 4164 return; 4165 NFSLOCKCLSTATE(); 4166 clp = nfscl_findcl(nmp); 4167 if (clp == NULL) { 4168 NFSUNLOCKCLSTATE(); 4169 return; 4170 } 4171 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4172 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4173 NFSGETNANOTIME(&dp->nfsdl_modtime); 4174 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4175 } 4176 NFSUNLOCKCLSTATE(); 4177 } 4178 4179 /* 4180 * If there is a valid write delegation for this file with a modtime set, 4181 * put that modtime in mtime. 4182 */ 4183 APPLESTATIC void 4184 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4185 { 4186 struct nfsclclient *clp; 4187 struct nfscldeleg *dp; 4188 struct nfsnode *np = VTONFS(vp); 4189 struct nfsmount *nmp; 4190 4191 nmp = VFSTONFS(vnode_mount(vp)); 4192 if (!NFSHASNFSV4(nmp)) 4193 return; 4194 NFSLOCKCLSTATE(); 4195 clp = nfscl_findcl(nmp); 4196 if (clp == NULL) { 4197 NFSUNLOCKCLSTATE(); 4198 return; 4199 } 4200 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4201 if (dp != NULL && 4202 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4203 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4204 *mtime = dp->nfsdl_modtime; 4205 NFSUNLOCKCLSTATE(); 4206 } 4207 4208 static int 4209 nfscl_errmap(struct nfsrv_descript *nd) 4210 { 4211 short *defaulterrp, *errp; 4212 4213 if (!nd->nd_repstat) 4214 return (0); 4215 if (nd->nd_procnum == NFSPROC_NOOP) 4216 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4217 if (nd->nd_repstat == EBADRPC) 4218 return (txdr_unsigned(NFSERR_BADXDR)); 4219 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4220 nd->nd_repstat == NFSERR_OPILLEGAL) 4221 return (txdr_unsigned(nd->nd_repstat)); 4222 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4223 while (*++errp) 4224 if (*errp == (short)nd->nd_repstat) 4225 return (txdr_unsigned(nd->nd_repstat)); 4226 return (txdr_unsigned(*defaulterrp)); 4227 } 4228 4229