1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Rick Macklem, University of Guelph 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * These functions implement the client side state handling for NFSv4. 35 * NFSv4 state handling: 36 * - A lockowner is used to determine lock contention, so it 37 * corresponds directly to a Posix pid. (1 to 1 mapping) 38 * - The correct granularity of an OpenOwner is not nearly so 39 * obvious. An OpenOwner does the following: 40 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner 41 * - is used to check for Open/Share contention (not applicable to 42 * this client, since all Opens are Deny_None) 43 * As such, I considered both extreme. 44 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes 45 * all Open, Close and Lock (with a new lockowner) Ops. 46 * 1 OpenOwner for each Open - This one results in an OpenConfirm for 47 * every Open, for most servers. 48 * So, I chose to use the same mapping as I did for LockOwnwers. 49 * The main concern here is that you can end up with multiple Opens 50 * for the same File Handle, but on different OpenOwners (opens 51 * inherited from parents, grandparents...) and you do not know 52 * which of these the vnodeop close applies to. This is handled by 53 * delaying the Close Op(s) until all of the Opens have been closed. 54 * (It is not yet obvious if this is the correct granularity.) 55 * - How the code handles serialization: 56 * - For the ClientId, it uses an exclusive lock while getting its 57 * SetClientId and during recovery. Otherwise, it uses a shared 58 * lock via a reference count. 59 * - For the rest of the data structures, it uses an SMP mutex 60 * (once the nfs client is SMP safe) and doesn't sleep while 61 * manipulating the linked lists. 62 * - The serialization of Open/Close/Lock/LockU falls out in the 63 * "wash", since OpenOwners and LockOwners are both mapped from 64 * Posix pid. In other words, there is only one Posix pid using 65 * any given owner, so that owner is serialized. (If you change 66 * the granularity of the OpenOwner, then code must be added to 67 * serialize Ops on the OpenOwner.) 68 * - When to get rid of OpenOwners and LockOwners. 69 * - The function nfscl_cleanup_common() is executed after a process exits. 70 * It goes through the client list looking for all Open and Lock Owners. 71 * When one is found, it is marked "defunct" or in the case of 72 * an OpenOwner without any Opens, freed. 73 * The renew thread scans for defunct Owners and gets rid of them, 74 * if it can. The LockOwners will also be deleted when the 75 * associated Open is closed. 76 * - If the LockU or Close Op(s) fail during close in a way 77 * that could be recovered upon retry, they are relinked to the 78 * ClientId's defunct open list and retried by the renew thread 79 * until they succeed or an unmount/recovery occurs. 80 * (Since we are done with them, they do not need to be recovered.) 81 */ 82 83 #ifndef APPLEKEXT 84 #include <fs/nfs/nfsport.h> 85 86 /* 87 * Global variables 88 */ 89 extern struct nfsstatsv1 nfsstatsv1; 90 extern struct nfsreqhead nfsd_reqq; 91 extern u_int32_t newnfs_false, newnfs_true; 92 extern int nfscl_debuglevel; 93 extern int nfscl_enablecallb; 94 extern int nfs_numnfscbd; 95 NFSREQSPINLOCK; 96 NFSCLSTATEMUTEX; 97 int nfscl_inited = 0; 98 struct nfsclhead nfsclhead; /* Head of clientid list */ 99 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER; 100 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER; 101 #endif /* !APPLEKEXT */ 102 103 static int nfscl_delegcnt = 0; 104 static int nfscl_layoutcnt = 0; 105 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *, 106 u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **); 107 static void nfscl_clrelease(struct nfsclclient *); 108 static void nfscl_cleanclient(struct nfsclclient *); 109 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 110 struct ucred *, NFSPROC_T *); 111 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 112 struct nfsmount *, struct ucred *, NFSPROC_T *); 113 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *); 114 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 115 struct nfscllock *, int); 116 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 117 struct nfscllock **, int); 118 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *); 119 static u_int32_t nfscl_nextcbident(void); 120 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **); 121 static struct nfsclclient *nfscl_getclnt(u_int32_t); 122 static struct nfsclclient *nfscl_getclntsess(uint8_t *); 123 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 124 int); 125 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *, 126 int, struct nfsclrecalllayout **); 127 static void nfscl_reldevinfo_locked(struct nfscldevinfo *); 128 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *, 129 int); 130 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *); 131 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 132 u_int8_t *, struct nfscllock **); 133 static void nfscl_freealllocks(struct nfscllockownerhead *, int); 134 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 135 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 136 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 137 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 138 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *); 139 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 140 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 141 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 142 static void nfscl_totalrecall(struct nfsclclient *); 143 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 144 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 145 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 146 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 147 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 148 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 149 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 150 struct ucred *, NFSPROC_T *); 151 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 152 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 153 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *); 154 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t); 155 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 156 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 157 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int); 158 static void nfscl_freeopenowner(struct nfsclowner *, int); 159 static void nfscl_cleandeleg(struct nfscldeleg *); 160 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 161 struct nfsmount *, NFSPROC_T *); 162 static void nfscl_emptylockowner(struct nfscllockowner *, 163 struct nfscllockownerfhhead *); 164 static void nfscl_mergeflayouts(struct nfsclflayouthead *, 165 struct nfsclflayouthead *); 166 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t, 167 uint64_t, uint32_t, struct nfsclrecalllayout *); 168 static int nfscl_seq(uint32_t, uint32_t); 169 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *, 170 struct ucred *, NFSPROC_T *); 171 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *, 172 struct ucred *, NFSPROC_T *); 173 174 static short nfscberr_null[] = { 175 0, 176 0, 177 }; 178 179 static short nfscberr_getattr[] = { 180 NFSERR_RESOURCE, 181 NFSERR_BADHANDLE, 182 NFSERR_BADXDR, 183 NFSERR_RESOURCE, 184 NFSERR_SERVERFAULT, 185 0, 186 }; 187 188 static short nfscberr_recall[] = { 189 NFSERR_RESOURCE, 190 NFSERR_BADHANDLE, 191 NFSERR_BADSTATEID, 192 NFSERR_BADXDR, 193 NFSERR_RESOURCE, 194 NFSERR_SERVERFAULT, 195 0, 196 }; 197 198 static short *nfscl_cberrmap[] = { 199 nfscberr_null, 200 nfscberr_null, 201 nfscberr_null, 202 nfscberr_getattr, 203 nfscberr_recall 204 }; 205 206 #define NETFAMILY(clp) \ 207 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 208 209 /* 210 * Called for an open operation. 211 * If the nfhp argument is NULL, just get an openowner. 212 */ 213 APPLESTATIC int 214 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 215 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 216 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 217 { 218 struct nfsclclient *clp; 219 struct nfsclowner *owp, *nowp; 220 struct nfsclopen *op = NULL, *nop = NULL; 221 struct nfscldeleg *dp; 222 struct nfsclownerhead *ohp; 223 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 224 int ret; 225 226 if (newonep != NULL) 227 *newonep = 0; 228 if (opp != NULL) 229 *opp = NULL; 230 if (owpp != NULL) 231 *owpp = NULL; 232 233 /* 234 * Might need one or both of these, so MALLOC them now, to 235 * avoid a tsleep() in MALLOC later. 236 */ 237 nowp = malloc(sizeof (struct nfsclowner), 238 M_NFSCLOWNER, M_WAITOK); 239 if (nfhp != NULL) 240 nop = malloc(sizeof (struct nfsclopen) + 241 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 242 ret = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 243 if (ret != 0) { 244 free(nowp, M_NFSCLOWNER); 245 if (nop != NULL) 246 free(nop, M_NFSCLOPEN); 247 return (ret); 248 } 249 250 /* 251 * Get the Open iff it already exists. 252 * If none found, add the new one or return error, depending upon 253 * "create". 254 */ 255 NFSLOCKCLSTATE(); 256 dp = NULL; 257 /* First check the delegation list */ 258 if (nfhp != NULL && usedeleg) { 259 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 260 if (dp->nfsdl_fhlen == fhlen && 261 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 262 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 263 (dp->nfsdl_flags & NFSCLDL_WRITE)) 264 break; 265 dp = NULL; 266 break; 267 } 268 } 269 } 270 271 if (dp != NULL) { 272 nfscl_filllockowner(p->td_proc, own, F_POSIX); 273 ohp = &dp->nfsdl_owner; 274 } else { 275 /* For NFSv4.1 and this option, use a single open_owner. */ 276 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 277 nfscl_filllockowner(NULL, own, F_POSIX); 278 else 279 nfscl_filllockowner(p->td_proc, own, F_POSIX); 280 ohp = &clp->nfsc_owner; 281 } 282 /* Now, search for an openowner */ 283 LIST_FOREACH(owp, ohp, nfsow_list) { 284 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 285 break; 286 } 287 288 /* 289 * Create a new open, as required. 290 */ 291 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 292 cred, newonep); 293 294 /* 295 * Now, check the mode on the open and return the appropriate 296 * value. 297 */ 298 if (retp != NULL) { 299 if (nfhp != NULL && dp != NULL && nop == NULL) 300 /* new local open on delegation */ 301 *retp = NFSCLOPEN_SETCRED; 302 else 303 *retp = NFSCLOPEN_OK; 304 } 305 if (op != NULL && (amode & ~(op->nfso_mode))) { 306 op->nfso_mode |= amode; 307 if (retp != NULL && dp == NULL) 308 *retp = NFSCLOPEN_DOOPEN; 309 } 310 311 /* 312 * Serialize modifications to the open owner for multiple threads 313 * within the same process using a read/write sleep lock. 314 * For NFSv4.1 and a single OpenOwner, allow concurrent open operations 315 * by acquiring a shared lock. The close operations still use an 316 * exclusive lock for this case. 317 */ 318 if (lockit != 0) { 319 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) { 320 /* 321 * Get a shared lock on the OpenOwner, but first 322 * wait for any pending exclusive lock, so that the 323 * exclusive locker gets priority. 324 */ 325 nfsv4_lock(&owp->nfsow_rwlock, 0, NULL, 326 NFSCLSTATEMUTEXPTR, NULL); 327 nfsv4_getref(&owp->nfsow_rwlock, NULL, 328 NFSCLSTATEMUTEXPTR, NULL); 329 } else 330 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 331 } 332 NFSUNLOCKCLSTATE(); 333 if (nowp != NULL) 334 free(nowp, M_NFSCLOWNER); 335 if (nop != NULL) 336 free(nop, M_NFSCLOPEN); 337 if (owpp != NULL) 338 *owpp = owp; 339 if (opp != NULL) 340 *opp = op; 341 return (0); 342 } 343 344 /* 345 * Create a new open, as required. 346 */ 347 static void 348 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 349 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 350 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 351 struct ucred *cred, int *newonep) 352 { 353 struct nfsclowner *owp = *owpp, *nowp; 354 struct nfsclopen *op, *nop; 355 356 if (nowpp != NULL) 357 nowp = *nowpp; 358 else 359 nowp = NULL; 360 if (nopp != NULL) 361 nop = *nopp; 362 else 363 nop = NULL; 364 if (owp == NULL && nowp != NULL) { 365 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 366 LIST_INIT(&nowp->nfsow_open); 367 nowp->nfsow_clp = clp; 368 nowp->nfsow_seqid = 0; 369 nowp->nfsow_defunct = 0; 370 nfscl_lockinit(&nowp->nfsow_rwlock); 371 if (dp != NULL) { 372 nfsstatsv1.cllocalopenowners++; 373 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 374 } else { 375 nfsstatsv1.clopenowners++; 376 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 377 } 378 owp = *owpp = nowp; 379 *nowpp = NULL; 380 if (newonep != NULL) 381 *newonep = 1; 382 } 383 384 /* If an fhp has been specified, create an Open as well. */ 385 if (fhp != NULL) { 386 /* and look for the correct open, based upon FH */ 387 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 388 if (op->nfso_fhlen == fhlen && 389 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 390 break; 391 } 392 if (op == NULL && nop != NULL) { 393 nop->nfso_own = owp; 394 nop->nfso_mode = 0; 395 nop->nfso_opencnt = 0; 396 nop->nfso_posixlock = 1; 397 nop->nfso_fhlen = fhlen; 398 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 399 LIST_INIT(&nop->nfso_lock); 400 nop->nfso_stateid.seqid = 0; 401 nop->nfso_stateid.other[0] = 0; 402 nop->nfso_stateid.other[1] = 0; 403 nop->nfso_stateid.other[2] = 0; 404 KASSERT(cred != NULL, ("%s: cred NULL\n", __func__)); 405 newnfs_copyincred(cred, &nop->nfso_cred); 406 if (dp != NULL) { 407 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 408 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 409 nfsdl_list); 410 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 411 nfsstatsv1.cllocalopens++; 412 } else { 413 nfsstatsv1.clopens++; 414 } 415 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 416 *opp = nop; 417 *nopp = NULL; 418 if (newonep != NULL) 419 *newonep = 1; 420 } else { 421 *opp = op; 422 } 423 } 424 } 425 426 /* 427 * Called to find/add a delegation to a client. 428 */ 429 APPLESTATIC int 430 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 431 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 432 { 433 struct nfscldeleg *dp = *dpp, *tdp; 434 435 /* 436 * First, if we have received a Read delegation for a file on a 437 * read/write file system, just return it, because they aren't 438 * useful, imho. 439 */ 440 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) && 441 (dp->nfsdl_flags & NFSCLDL_READ)) { 442 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p); 443 free(dp, M_NFSCLDELEG); 444 *dpp = NULL; 445 return (0); 446 } 447 448 /* Look for the correct deleg, based upon FH */ 449 NFSLOCKCLSTATE(); 450 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 451 if (tdp == NULL) { 452 if (dp == NULL) { 453 NFSUNLOCKCLSTATE(); 454 return (NFSERR_BADSTATEID); 455 } 456 *dpp = NULL; 457 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 458 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 459 nfsdl_hash); 460 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 461 nfsstatsv1.cldelegates++; 462 nfscl_delegcnt++; 463 } else { 464 /* 465 * Delegation already exists, what do we do if a new one?? 466 */ 467 if (dp != NULL) { 468 printf("Deleg already exists!\n"); 469 free(dp, M_NFSCLDELEG); 470 *dpp = NULL; 471 } else { 472 *dpp = tdp; 473 } 474 } 475 NFSUNLOCKCLSTATE(); 476 return (0); 477 } 478 479 /* 480 * Find a delegation for this file handle. Return NULL upon failure. 481 */ 482 static struct nfscldeleg * 483 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 484 { 485 struct nfscldeleg *dp; 486 487 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 488 if (dp->nfsdl_fhlen == fhlen && 489 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 490 break; 491 } 492 return (dp); 493 } 494 495 /* 496 * Get a stateid for an I/O operation. First, look for an open and iff 497 * found, return either a lockowner stateid or the open stateid. 498 * If no Open is found, just return error and the special stateid of all zeros. 499 */ 500 APPLESTATIC int 501 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 502 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 503 void **lckpp) 504 { 505 struct nfsclclient *clp; 506 struct nfsclowner *owp; 507 struct nfsclopen *op = NULL, *top; 508 struct nfscllockowner *lp; 509 struct nfscldeleg *dp; 510 struct nfsnode *np; 511 struct nfsmount *nmp; 512 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 513 int error, done; 514 515 *lckpp = NULL; 516 /* 517 * Initially, just set the special stateid of all zeros. 518 * (Don't do this for a DS, since the special stateid can't be used.) 519 */ 520 if (fords == 0) { 521 stateidp->seqid = 0; 522 stateidp->other[0] = 0; 523 stateidp->other[1] = 0; 524 stateidp->other[2] = 0; 525 } 526 if (vnode_vtype(vp) != VREG) 527 return (EISDIR); 528 np = VTONFS(vp); 529 nmp = VFSTONFS(vnode_mount(vp)); 530 NFSLOCKCLSTATE(); 531 clp = nfscl_findcl(nmp); 532 if (clp == NULL) { 533 NFSUNLOCKCLSTATE(); 534 return (EACCES); 535 } 536 537 /* 538 * Wait for recovery to complete. 539 */ 540 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 541 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 542 PZERO, "nfsrecvr", NULL); 543 544 /* 545 * First, look for a delegation. 546 */ 547 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 548 if (dp->nfsdl_fhlen == fhlen && 549 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 550 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 551 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 552 stateidp->seqid = dp->nfsdl_stateid.seqid; 553 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 554 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 555 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 556 if (!(np->n_flag & NDELEGRECALL)) { 557 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 558 nfsdl_list); 559 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 560 nfsdl_list); 561 dp->nfsdl_timestamp = NFSD_MONOSEC + 562 120; 563 dp->nfsdl_rwlock.nfslock_usecnt++; 564 *lckpp = (void *)&dp->nfsdl_rwlock; 565 } 566 NFSUNLOCKCLSTATE(); 567 return (0); 568 } 569 break; 570 } 571 } 572 573 if (p != NULL) { 574 /* 575 * If p != NULL, we want to search the parentage tree 576 * for a matching OpenOwner and use that. 577 */ 578 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 579 nfscl_filllockowner(NULL, own, F_POSIX); 580 else 581 nfscl_filllockowner(p->td_proc, own, F_POSIX); 582 lp = NULL; 583 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own, 584 mode, &lp, &op); 585 if (error == 0 && lp != NULL && fords == 0) { 586 /* Don't return a lock stateid for a DS. */ 587 stateidp->seqid = 588 lp->nfsl_stateid.seqid; 589 stateidp->other[0] = 590 lp->nfsl_stateid.other[0]; 591 stateidp->other[1] = 592 lp->nfsl_stateid.other[1]; 593 stateidp->other[2] = 594 lp->nfsl_stateid.other[2]; 595 NFSUNLOCKCLSTATE(); 596 return (0); 597 } 598 } 599 if (op == NULL) { 600 /* If not found, just look for any OpenOwner that will work. */ 601 top = NULL; 602 done = 0; 603 owp = LIST_FIRST(&clp->nfsc_owner); 604 while (!done && owp != NULL) { 605 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 606 if (op->nfso_fhlen == fhlen && 607 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) { 608 if (top == NULL && (op->nfso_mode & 609 NFSV4OPEN_ACCESSWRITE) != 0 && 610 (mode & NFSV4OPEN_ACCESSREAD) != 0) 611 top = op; 612 if ((mode & op->nfso_mode) == mode) { 613 done = 1; 614 break; 615 } 616 } 617 } 618 if (!done) 619 owp = LIST_NEXT(owp, nfsow_list); 620 } 621 if (!done) { 622 NFSCL_DEBUG(2, "openmode top=%p\n", top); 623 if (top == NULL || NFSHASOPENMODE(nmp)) { 624 NFSUNLOCKCLSTATE(); 625 return (ENOENT); 626 } else 627 op = top; 628 } 629 /* 630 * For read aheads or write behinds, use the open cred. 631 * A read ahead or write behind is indicated by p == NULL. 632 */ 633 if (p == NULL) 634 newnfs_copycred(&op->nfso_cred, cred); 635 } 636 637 /* 638 * No lock stateid, so return the open stateid. 639 */ 640 stateidp->seqid = op->nfso_stateid.seqid; 641 stateidp->other[0] = op->nfso_stateid.other[0]; 642 stateidp->other[1] = op->nfso_stateid.other[1]; 643 stateidp->other[2] = op->nfso_stateid.other[2]; 644 NFSUNLOCKCLSTATE(); 645 return (0); 646 } 647 648 /* 649 * Search for a matching file, mode and, optionally, lockowner. 650 */ 651 static int 652 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 653 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode, 654 struct nfscllockowner **lpp, struct nfsclopen **opp) 655 { 656 struct nfsclowner *owp; 657 struct nfsclopen *op, *rop, *rop2; 658 struct nfscllockowner *lp; 659 int keep_looping; 660 661 if (lpp != NULL) 662 *lpp = NULL; 663 /* 664 * rop will be set to the open to be returned. There are three 665 * variants of this, all for an open of the correct file: 666 * 1 - A match of lockown. 667 * 2 - A match of the openown, when no lockown match exists. 668 * 3 - A match for any open, if no openown or lockown match exists. 669 * Looking for #2 over #3 probably isn't necessary, but since 670 * RFC3530 is vague w.r.t. the relationship between openowners and 671 * lockowners, I think this is the safer way to go. 672 */ 673 rop = NULL; 674 rop2 = NULL; 675 keep_looping = 1; 676 /* Search the client list */ 677 owp = LIST_FIRST(ohp); 678 while (owp != NULL && keep_looping != 0) { 679 /* and look for the correct open */ 680 op = LIST_FIRST(&owp->nfsow_open); 681 while (op != NULL && keep_looping != 0) { 682 if (op->nfso_fhlen == fhlen && 683 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 684 && (op->nfso_mode & mode) == mode) { 685 if (lpp != NULL) { 686 /* Now look for a matching lockowner. */ 687 LIST_FOREACH(lp, &op->nfso_lock, 688 nfsl_list) { 689 if (!NFSBCMP(lp->nfsl_owner, 690 lockown, 691 NFSV4CL_LOCKNAMELEN)) { 692 *lpp = lp; 693 rop = op; 694 keep_looping = 0; 695 break; 696 } 697 } 698 } 699 if (rop == NULL && !NFSBCMP(owp->nfsow_owner, 700 openown, NFSV4CL_LOCKNAMELEN)) { 701 rop = op; 702 if (lpp == NULL) 703 keep_looping = 0; 704 } 705 if (rop2 == NULL) 706 rop2 = op; 707 } 708 op = LIST_NEXT(op, nfso_list); 709 } 710 owp = LIST_NEXT(owp, nfsow_list); 711 } 712 if (rop == NULL) 713 rop = rop2; 714 if (rop == NULL) 715 return (EBADF); 716 *opp = rop; 717 return (0); 718 } 719 720 /* 721 * Release use of an open owner. Called when open operations are done 722 * with the open owner. 723 */ 724 APPLESTATIC void 725 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp, 726 __unused int error, __unused int candelete, int unlocked) 727 { 728 729 if (owp == NULL) 730 return; 731 NFSLOCKCLSTATE(); 732 if (unlocked == 0) { 733 if (NFSHASONEOPENOWN(nmp)) 734 nfsv4_relref(&owp->nfsow_rwlock); 735 else 736 nfscl_lockunlock(&owp->nfsow_rwlock); 737 } 738 nfscl_clrelease(owp->nfsow_clp); 739 NFSUNLOCKCLSTATE(); 740 } 741 742 /* 743 * Release use of an open structure under an open owner. 744 */ 745 APPLESTATIC void 746 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error, 747 int candelete) 748 { 749 struct nfsclclient *clp; 750 struct nfsclowner *owp; 751 752 if (op == NULL) 753 return; 754 NFSLOCKCLSTATE(); 755 owp = op->nfso_own; 756 if (NFSHASONEOPENOWN(nmp)) 757 nfsv4_relref(&owp->nfsow_rwlock); 758 else 759 nfscl_lockunlock(&owp->nfsow_rwlock); 760 clp = owp->nfsow_clp; 761 if (error && candelete && op->nfso_opencnt == 0) 762 nfscl_freeopen(op, 0); 763 nfscl_clrelease(clp); 764 NFSUNLOCKCLSTATE(); 765 } 766 767 /* 768 * Called to get a clientid structure. It will optionally lock the 769 * client data structures to do the SetClientId/SetClientId_confirm, 770 * but will release that lock and return the clientid with a reference 771 * count on it. 772 * If the "cred" argument is NULL, a new clientid should not be created. 773 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 774 * be done. 775 * The start_renewthread argument tells nfscl_getcl() to start a renew 776 * thread if this creates a new clp. 777 * It always clpp with a reference count on it, unless returning an error. 778 */ 779 APPLESTATIC int 780 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p, 781 int start_renewthread, struct nfsclclient **clpp) 782 { 783 struct nfsclclient *clp; 784 struct nfsclclient *newclp = NULL; 785 struct nfsmount *nmp; 786 char uuid[HOSTUUIDLEN]; 787 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 788 u_int16_t idlen = 0; 789 790 nmp = VFSTONFS(mp); 791 if (cred != NULL) { 792 getcredhostuuid(cred, uuid, sizeof uuid); 793 idlen = strlen(uuid); 794 if (idlen > 0) 795 idlen += sizeof (u_int64_t); 796 else 797 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 798 newclp = malloc( 799 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 800 M_WAITOK | M_ZERO); 801 } 802 NFSLOCKCLSTATE(); 803 /* 804 * If a forced dismount is already in progress, don't 805 * allocate a new clientid and get out now. For the case where 806 * clp != NULL, this is a harmless optimization. 807 */ 808 if (NFSCL_FORCEDISM(mp)) { 809 NFSUNLOCKCLSTATE(); 810 if (newclp != NULL) 811 free(newclp, M_NFSCLCLIENT); 812 return (EBADF); 813 } 814 clp = nmp->nm_clp; 815 if (clp == NULL) { 816 if (newclp == NULL) { 817 NFSUNLOCKCLSTATE(); 818 return (EACCES); 819 } 820 clp = newclp; 821 clp->nfsc_idlen = idlen; 822 LIST_INIT(&clp->nfsc_owner); 823 TAILQ_INIT(&clp->nfsc_deleg); 824 TAILQ_INIT(&clp->nfsc_layout); 825 LIST_INIT(&clp->nfsc_devinfo); 826 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 827 LIST_INIT(&clp->nfsc_deleghash[i]); 828 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 829 LIST_INIT(&clp->nfsc_layouthash[i]); 830 clp->nfsc_flags = NFSCLFLAGS_INITED; 831 clp->nfsc_clientidrev = 1; 832 clp->nfsc_cbident = nfscl_nextcbident(); 833 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 834 clp->nfsc_idlen); 835 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 836 nmp->nm_clp = clp; 837 clp->nfsc_nmp = nmp; 838 NFSUNLOCKCLSTATE(); 839 if (start_renewthread != 0) 840 nfscl_start_renewthread(clp); 841 } else { 842 NFSUNLOCKCLSTATE(); 843 if (newclp != NULL) 844 free(newclp, M_NFSCLCLIENT); 845 } 846 NFSLOCKCLSTATE(); 847 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 848 !NFSCL_FORCEDISM(mp)) 849 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 850 NFSCLSTATEMUTEXPTR, mp); 851 if (igotlock == 0) { 852 /* 853 * Call nfsv4_lock() with "iwantlock == 0" so that it will 854 * wait for a pending exclusive lock request. This gives the 855 * exclusive lock request priority over this shared lock 856 * request. 857 * An exclusive lock on nfsc_lock is used mainly for server 858 * crash recoveries. 859 */ 860 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp); 861 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 862 } 863 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) { 864 /* 865 * Both nfsv4_lock() and nfsv4_getref() know to check 866 * for NFSCL_FORCEDISM() and return without sleeping to 867 * wait for the exclusive lock to be released, since it 868 * might be held by nfscl_umount() and we need to get out 869 * now for that case and not wait until nfscl_umount() 870 * releases it. 871 */ 872 NFSUNLOCKCLSTATE(); 873 return (EBADF); 874 } 875 NFSUNLOCKCLSTATE(); 876 877 /* 878 * If it needs a clientid, do the setclientid now. 879 */ 880 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 881 if (!igotlock) 882 panic("nfscl_clget"); 883 if (p == NULL || cred == NULL) { 884 NFSLOCKCLSTATE(); 885 nfsv4_unlock(&clp->nfsc_lock, 0); 886 NFSUNLOCKCLSTATE(); 887 return (EACCES); 888 } 889 /* 890 * If RFC3530 Sec. 14.2.33 is taken literally, 891 * NFSERR_CLIDINUSE will be returned persistently for the 892 * case where a new mount of the same file system is using 893 * a different principal. In practice, NFSERR_CLIDINUSE is 894 * only returned when there is outstanding unexpired state 895 * on the clientid. As such, try for twice the lease 896 * interval, if we know what that is. Otherwise, make a 897 * wild ass guess. 898 * The case of returning NFSERR_STALECLIENTID is far less 899 * likely, but might occur if there is a significant delay 900 * between doing the SetClientID and SetClientIDConfirm Ops, 901 * such that the server throws away the clientid before 902 * receiving the SetClientIDConfirm. 903 */ 904 if (clp->nfsc_renew > 0) 905 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 906 else 907 clidinusedelay = 120; 908 trystalecnt = 3; 909 do { 910 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 911 if (error == NFSERR_STALECLIENTID || 912 error == NFSERR_STALEDONTRECOVER || 913 error == NFSERR_BADSESSION || 914 error == NFSERR_CLIDINUSE) { 915 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 916 } 917 } while (((error == NFSERR_STALECLIENTID || 918 error == NFSERR_BADSESSION || 919 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 920 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 921 if (error) { 922 NFSLOCKCLSTATE(); 923 nfsv4_unlock(&clp->nfsc_lock, 0); 924 NFSUNLOCKCLSTATE(); 925 return (error); 926 } 927 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 928 } 929 if (igotlock) { 930 NFSLOCKCLSTATE(); 931 nfsv4_unlock(&clp->nfsc_lock, 1); 932 NFSUNLOCKCLSTATE(); 933 } 934 935 *clpp = clp; 936 return (0); 937 } 938 939 /* 940 * Get a reference to a clientid and return it, if valid. 941 */ 942 APPLESTATIC struct nfsclclient * 943 nfscl_findcl(struct nfsmount *nmp) 944 { 945 struct nfsclclient *clp; 946 947 clp = nmp->nm_clp; 948 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 949 return (NULL); 950 return (clp); 951 } 952 953 /* 954 * Release the clientid structure. It may be locked or reference counted. 955 */ 956 static void 957 nfscl_clrelease(struct nfsclclient *clp) 958 { 959 960 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 961 nfsv4_unlock(&clp->nfsc_lock, 0); 962 else 963 nfsv4_relref(&clp->nfsc_lock); 964 } 965 966 /* 967 * External call for nfscl_clrelease. 968 */ 969 APPLESTATIC void 970 nfscl_clientrelease(struct nfsclclient *clp) 971 { 972 973 NFSLOCKCLSTATE(); 974 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 975 nfsv4_unlock(&clp->nfsc_lock, 0); 976 else 977 nfsv4_relref(&clp->nfsc_lock); 978 NFSUNLOCKCLSTATE(); 979 } 980 981 /* 982 * Called when wanting to lock a byte region. 983 */ 984 APPLESTATIC int 985 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 986 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 987 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 988 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 989 { 990 struct nfscllockowner *lp; 991 struct nfsclopen *op; 992 struct nfsclclient *clp; 993 struct nfscllockowner *nlp; 994 struct nfscllock *nlop, *otherlop; 995 struct nfscldeleg *dp = NULL, *ldp = NULL; 996 struct nfscllockownerhead *lhp = NULL; 997 struct nfsnode *np; 998 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 999 u_int8_t *openownp; 1000 int error = 0, ret, donelocally = 0; 1001 u_int32_t mode; 1002 1003 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 1004 mode = 0; 1005 np = VTONFS(vp); 1006 *lpp = NULL; 1007 lp = NULL; 1008 *newonep = 0; 1009 *donelocallyp = 0; 1010 1011 /* 1012 * Might need these, so MALLOC them now, to 1013 * avoid a tsleep() in MALLOC later. 1014 */ 1015 nlp = malloc( 1016 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 1017 otherlop = malloc( 1018 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1019 nlop = malloc( 1020 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1021 nlop->nfslo_type = type; 1022 nlop->nfslo_first = off; 1023 if (len == NFS64BITSSET) { 1024 nlop->nfslo_end = NFS64BITSSET; 1025 } else { 1026 nlop->nfslo_end = off + len; 1027 if (nlop->nfslo_end <= nlop->nfslo_first) 1028 error = NFSERR_INVAL; 1029 } 1030 1031 if (!error) { 1032 if (recovery) 1033 clp = rclp; 1034 else 1035 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1036 } 1037 if (error) { 1038 free(nlp, M_NFSCLLOCKOWNER); 1039 free(otherlop, M_NFSCLLOCK); 1040 free(nlop, M_NFSCLLOCK); 1041 return (error); 1042 } 1043 1044 op = NULL; 1045 if (recovery) { 1046 ownp = rownp; 1047 openownp = ropenownp; 1048 } else { 1049 nfscl_filllockowner(id, own, flags); 1050 ownp = own; 1051 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 1052 nfscl_filllockowner(NULL, openown, F_POSIX); 1053 else 1054 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 1055 openownp = openown; 1056 } 1057 if (!recovery) { 1058 NFSLOCKCLSTATE(); 1059 /* 1060 * First, search for a delegation. If one exists for this file, 1061 * the lock can be done locally against it, so long as there 1062 * isn't a local lock conflict. 1063 */ 1064 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1065 np->n_fhp->nfh_len); 1066 /* Just sanity check for correct type of delegation */ 1067 if (dp != NULL && ((dp->nfsdl_flags & 1068 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 1069 (type == F_WRLCK && 1070 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 1071 dp = NULL; 1072 } 1073 if (dp != NULL) { 1074 /* Now, find an open and maybe a lockowner. */ 1075 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 1076 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 1077 if (ret) 1078 ret = nfscl_getopen(&clp->nfsc_owner, 1079 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1080 ownp, mode, NULL, &op); 1081 if (!ret) { 1082 lhp = &dp->nfsdl_lock; 1083 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 1084 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 1085 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 1086 donelocally = 1; 1087 } else { 1088 dp = NULL; 1089 } 1090 } 1091 if (!donelocally) { 1092 /* 1093 * Get the related Open and maybe lockowner. 1094 */ 1095 error = nfscl_getopen(&clp->nfsc_owner, 1096 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1097 ownp, mode, &lp, &op); 1098 if (!error) 1099 lhp = &op->nfso_lock; 1100 } 1101 if (!error && !recovery) 1102 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1103 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1104 if (error) { 1105 if (!recovery) { 1106 nfscl_clrelease(clp); 1107 NFSUNLOCKCLSTATE(); 1108 } 1109 free(nlp, M_NFSCLLOCKOWNER); 1110 free(otherlop, M_NFSCLLOCK); 1111 free(nlop, M_NFSCLLOCK); 1112 return (error); 1113 } 1114 1115 /* 1116 * Ok, see if a lockowner exists and create one, as required. 1117 */ 1118 if (lp == NULL) 1119 LIST_FOREACH(lp, lhp, nfsl_list) { 1120 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1121 break; 1122 } 1123 if (lp == NULL) { 1124 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1125 if (recovery) 1126 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1127 NFSV4CL_LOCKNAMELEN); 1128 else 1129 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1130 NFSV4CL_LOCKNAMELEN); 1131 nlp->nfsl_seqid = 0; 1132 nlp->nfsl_lockflags = flags; 1133 nlp->nfsl_inprog = NULL; 1134 nfscl_lockinit(&nlp->nfsl_rwlock); 1135 LIST_INIT(&nlp->nfsl_lock); 1136 if (donelocally) { 1137 nlp->nfsl_open = NULL; 1138 nfsstatsv1.cllocallockowners++; 1139 } else { 1140 nlp->nfsl_open = op; 1141 nfsstatsv1.cllockowners++; 1142 } 1143 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1144 lp = nlp; 1145 nlp = NULL; 1146 *newonep = 1; 1147 } 1148 1149 /* 1150 * Now, update the byte ranges for locks. 1151 */ 1152 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1153 if (!ret) 1154 donelocally = 1; 1155 if (donelocally) { 1156 *donelocallyp = 1; 1157 if (!recovery) 1158 nfscl_clrelease(clp); 1159 } else { 1160 /* 1161 * Serial modifications on the lock owner for multiple threads 1162 * for the same process using a read/write lock. 1163 */ 1164 if (!recovery) 1165 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1166 } 1167 if (!recovery) 1168 NFSUNLOCKCLSTATE(); 1169 1170 if (nlp) 1171 free(nlp, M_NFSCLLOCKOWNER); 1172 if (nlop) 1173 free(nlop, M_NFSCLLOCK); 1174 if (otherlop) 1175 free(otherlop, M_NFSCLLOCK); 1176 1177 *lpp = lp; 1178 return (0); 1179 } 1180 1181 /* 1182 * Called to unlock a byte range, for LockU. 1183 */ 1184 APPLESTATIC int 1185 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1186 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1187 struct nfsclclient *clp, void *id, int flags, 1188 struct nfscllockowner **lpp, int *dorpcp) 1189 { 1190 struct nfscllockowner *lp; 1191 struct nfsclowner *owp; 1192 struct nfsclopen *op; 1193 struct nfscllock *nlop, *other_lop = NULL; 1194 struct nfscldeleg *dp; 1195 struct nfsnode *np; 1196 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1197 int ret = 0, fnd; 1198 1199 np = VTONFS(vp); 1200 *lpp = NULL; 1201 *dorpcp = 0; 1202 1203 /* 1204 * Might need these, so MALLOC them now, to 1205 * avoid a tsleep() in MALLOC later. 1206 */ 1207 nlop = malloc( 1208 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1209 nlop->nfslo_type = F_UNLCK; 1210 nlop->nfslo_first = off; 1211 if (len == NFS64BITSSET) { 1212 nlop->nfslo_end = NFS64BITSSET; 1213 } else { 1214 nlop->nfslo_end = off + len; 1215 if (nlop->nfslo_end <= nlop->nfslo_first) { 1216 free(nlop, M_NFSCLLOCK); 1217 return (NFSERR_INVAL); 1218 } 1219 } 1220 if (callcnt == 0) { 1221 other_lop = malloc( 1222 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1223 *other_lop = *nlop; 1224 } 1225 nfscl_filllockowner(id, own, flags); 1226 dp = NULL; 1227 NFSLOCKCLSTATE(); 1228 if (callcnt == 0) 1229 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1230 np->n_fhp->nfh_len); 1231 1232 /* 1233 * First, unlock any local regions on a delegation. 1234 */ 1235 if (dp != NULL) { 1236 /* Look for this lockowner. */ 1237 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1238 if (!NFSBCMP(lp->nfsl_owner, own, 1239 NFSV4CL_LOCKNAMELEN)) 1240 break; 1241 } 1242 if (lp != NULL) 1243 /* Use other_lop, so nlop is still available */ 1244 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1245 } 1246 1247 /* 1248 * Now, find a matching open/lockowner that hasn't already been done, 1249 * as marked by nfsl_inprog. 1250 */ 1251 lp = NULL; 1252 fnd = 0; 1253 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1254 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1255 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1256 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1257 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1258 if (lp->nfsl_inprog == NULL && 1259 !NFSBCMP(lp->nfsl_owner, own, 1260 NFSV4CL_LOCKNAMELEN)) { 1261 fnd = 1; 1262 break; 1263 } 1264 } 1265 if (fnd) 1266 break; 1267 } 1268 } 1269 if (fnd) 1270 break; 1271 } 1272 1273 if (lp != NULL) { 1274 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1275 if (ret) 1276 *dorpcp = 1; 1277 /* 1278 * Serial modifications on the lock owner for multiple 1279 * threads for the same process using a read/write lock. 1280 */ 1281 lp->nfsl_inprog = p; 1282 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1283 *lpp = lp; 1284 } 1285 NFSUNLOCKCLSTATE(); 1286 if (nlop) 1287 free(nlop, M_NFSCLLOCK); 1288 if (other_lop) 1289 free(other_lop, M_NFSCLLOCK); 1290 return (0); 1291 } 1292 1293 /* 1294 * Release all lockowners marked in progess for this process and file. 1295 */ 1296 APPLESTATIC void 1297 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1298 void *id, int flags) 1299 { 1300 struct nfsclowner *owp; 1301 struct nfsclopen *op; 1302 struct nfscllockowner *lp; 1303 struct nfsnode *np; 1304 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1305 1306 np = VTONFS(vp); 1307 nfscl_filllockowner(id, own, flags); 1308 NFSLOCKCLSTATE(); 1309 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1310 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1311 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1312 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1313 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1314 if (lp->nfsl_inprog == p && 1315 !NFSBCMP(lp->nfsl_owner, own, 1316 NFSV4CL_LOCKNAMELEN)) { 1317 lp->nfsl_inprog = NULL; 1318 nfscl_lockunlock(&lp->nfsl_rwlock); 1319 } 1320 } 1321 } 1322 } 1323 } 1324 nfscl_clrelease(clp); 1325 NFSUNLOCKCLSTATE(); 1326 } 1327 1328 /* 1329 * Called to find out if any bytes within the byte range specified are 1330 * write locked by the calling process. Used to determine if flushing 1331 * is required before a LockU. 1332 * If in doubt, return 1, so the flush will occur. 1333 */ 1334 APPLESTATIC int 1335 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1336 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1337 { 1338 struct nfsclowner *owp; 1339 struct nfscllockowner *lp; 1340 struct nfsclopen *op; 1341 struct nfsclclient *clp; 1342 struct nfscllock *lop; 1343 struct nfscldeleg *dp; 1344 struct nfsnode *np; 1345 u_int64_t off, end; 1346 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1347 int error = 0; 1348 1349 np = VTONFS(vp); 1350 switch (fl->l_whence) { 1351 case SEEK_SET: 1352 case SEEK_CUR: 1353 /* 1354 * Caller is responsible for adding any necessary offset 1355 * when SEEK_CUR is used. 1356 */ 1357 off = fl->l_start; 1358 break; 1359 case SEEK_END: 1360 off = np->n_size + fl->l_start; 1361 break; 1362 default: 1363 return (1); 1364 } 1365 if (fl->l_len != 0) { 1366 end = off + fl->l_len; 1367 if (end < off) 1368 return (1); 1369 } else { 1370 end = NFS64BITSSET; 1371 } 1372 1373 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1374 if (error) 1375 return (1); 1376 nfscl_filllockowner(id, own, flags); 1377 NFSLOCKCLSTATE(); 1378 1379 /* 1380 * First check the delegation locks. 1381 */ 1382 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1383 if (dp != NULL) { 1384 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1385 if (!NFSBCMP(lp->nfsl_owner, own, 1386 NFSV4CL_LOCKNAMELEN)) 1387 break; 1388 } 1389 if (lp != NULL) { 1390 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1391 if (lop->nfslo_first >= end) 1392 break; 1393 if (lop->nfslo_end <= off) 1394 continue; 1395 if (lop->nfslo_type == F_WRLCK) { 1396 nfscl_clrelease(clp); 1397 NFSUNLOCKCLSTATE(); 1398 return (1); 1399 } 1400 } 1401 } 1402 } 1403 1404 /* 1405 * Now, check state against the server. 1406 */ 1407 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1408 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1409 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1410 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1411 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1412 if (!NFSBCMP(lp->nfsl_owner, own, 1413 NFSV4CL_LOCKNAMELEN)) 1414 break; 1415 } 1416 if (lp != NULL) { 1417 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1418 if (lop->nfslo_first >= end) 1419 break; 1420 if (lop->nfslo_end <= off) 1421 continue; 1422 if (lop->nfslo_type == F_WRLCK) { 1423 nfscl_clrelease(clp); 1424 NFSUNLOCKCLSTATE(); 1425 return (1); 1426 } 1427 } 1428 } 1429 } 1430 } 1431 } 1432 nfscl_clrelease(clp); 1433 NFSUNLOCKCLSTATE(); 1434 return (0); 1435 } 1436 1437 /* 1438 * Release a byte range lock owner structure. 1439 */ 1440 APPLESTATIC void 1441 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1442 { 1443 struct nfsclclient *clp; 1444 1445 if (lp == NULL) 1446 return; 1447 NFSLOCKCLSTATE(); 1448 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1449 if (error != 0 && candelete && 1450 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1451 nfscl_freelockowner(lp, 0); 1452 else 1453 nfscl_lockunlock(&lp->nfsl_rwlock); 1454 nfscl_clrelease(clp); 1455 NFSUNLOCKCLSTATE(); 1456 } 1457 1458 /* 1459 * Free up an open structure and any associated byte range lock structures. 1460 */ 1461 APPLESTATIC void 1462 nfscl_freeopen(struct nfsclopen *op, int local) 1463 { 1464 1465 LIST_REMOVE(op, nfso_list); 1466 nfscl_freealllocks(&op->nfso_lock, local); 1467 free(op, M_NFSCLOPEN); 1468 if (local) 1469 nfsstatsv1.cllocalopens--; 1470 else 1471 nfsstatsv1.clopens--; 1472 } 1473 1474 /* 1475 * Free up all lock owners and associated locks. 1476 */ 1477 static void 1478 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1479 { 1480 struct nfscllockowner *lp, *nlp; 1481 1482 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1483 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1484 panic("nfscllckw"); 1485 nfscl_freelockowner(lp, local); 1486 } 1487 } 1488 1489 /* 1490 * Called for an Open when NFSERR_EXPIRED is received from the server. 1491 * If there are no byte range locks nor a Share Deny lost, try to do a 1492 * fresh Open. Otherwise, free the open. 1493 */ 1494 static int 1495 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1496 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1497 { 1498 struct nfscllockowner *lp; 1499 struct nfscldeleg *dp; 1500 int mustdelete = 0, error; 1501 1502 /* 1503 * Look for any byte range lock(s). 1504 */ 1505 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1506 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1507 mustdelete = 1; 1508 break; 1509 } 1510 } 1511 1512 /* 1513 * If no byte range lock(s) nor a Share deny, try to re-open. 1514 */ 1515 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1516 newnfs_copycred(&op->nfso_cred, cred); 1517 dp = NULL; 1518 error = nfsrpc_reopen(nmp, op->nfso_fh, 1519 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1520 if (error) { 1521 mustdelete = 1; 1522 if (dp != NULL) { 1523 free(dp, M_NFSCLDELEG); 1524 dp = NULL; 1525 } 1526 } 1527 if (dp != NULL) 1528 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1529 op->nfso_fhlen, cred, p, &dp); 1530 } 1531 1532 /* 1533 * If a byte range lock or Share deny or couldn't re-open, free it. 1534 */ 1535 if (mustdelete) 1536 nfscl_freeopen(op, 0); 1537 return (mustdelete); 1538 } 1539 1540 /* 1541 * Free up an open owner structure. 1542 */ 1543 static void 1544 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1545 { 1546 1547 LIST_REMOVE(owp, nfsow_list); 1548 free(owp, M_NFSCLOWNER); 1549 if (local) 1550 nfsstatsv1.cllocalopenowners--; 1551 else 1552 nfsstatsv1.clopenowners--; 1553 } 1554 1555 /* 1556 * Free up a byte range lock owner structure. 1557 */ 1558 APPLESTATIC void 1559 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1560 { 1561 struct nfscllock *lop, *nlop; 1562 1563 LIST_REMOVE(lp, nfsl_list); 1564 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1565 nfscl_freelock(lop, local); 1566 } 1567 free(lp, M_NFSCLLOCKOWNER); 1568 if (local) 1569 nfsstatsv1.cllocallockowners--; 1570 else 1571 nfsstatsv1.cllockowners--; 1572 } 1573 1574 /* 1575 * Free up a byte range lock structure. 1576 */ 1577 APPLESTATIC void 1578 nfscl_freelock(struct nfscllock *lop, int local) 1579 { 1580 1581 LIST_REMOVE(lop, nfslo_list); 1582 free(lop, M_NFSCLLOCK); 1583 if (local) 1584 nfsstatsv1.cllocallocks--; 1585 else 1586 nfsstatsv1.cllocks--; 1587 } 1588 1589 /* 1590 * Clean out the state related to a delegation. 1591 */ 1592 static void 1593 nfscl_cleandeleg(struct nfscldeleg *dp) 1594 { 1595 struct nfsclowner *owp, *nowp; 1596 struct nfsclopen *op; 1597 1598 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1599 op = LIST_FIRST(&owp->nfsow_open); 1600 if (op != NULL) { 1601 if (LIST_NEXT(op, nfso_list) != NULL) 1602 panic("nfscleandel"); 1603 nfscl_freeopen(op, 1); 1604 } 1605 nfscl_freeopenowner(owp, 1); 1606 } 1607 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1608 } 1609 1610 /* 1611 * Free a delegation. 1612 */ 1613 static void 1614 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1615 { 1616 1617 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1618 LIST_REMOVE(dp, nfsdl_hash); 1619 free(dp, M_NFSCLDELEG); 1620 nfsstatsv1.cldelegates--; 1621 nfscl_delegcnt--; 1622 } 1623 1624 /* 1625 * Free up all state related to this client structure. 1626 */ 1627 static void 1628 nfscl_cleanclient(struct nfsclclient *clp) 1629 { 1630 struct nfsclowner *owp, *nowp; 1631 struct nfsclopen *op, *nop; 1632 struct nfscllayout *lyp, *nlyp; 1633 struct nfscldevinfo *dip, *ndip; 1634 1635 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 1636 nfscl_freelayout(lyp); 1637 1638 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) 1639 nfscl_freedevinfo(dip); 1640 1641 /* Now, all the OpenOwners, etc. */ 1642 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1643 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1644 nfscl_freeopen(op, 0); 1645 } 1646 nfscl_freeopenowner(owp, 0); 1647 } 1648 } 1649 1650 /* 1651 * Called when an NFSERR_EXPIRED is received from the server. 1652 */ 1653 static void 1654 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1655 struct ucred *cred, NFSPROC_T *p) 1656 { 1657 struct nfsclowner *owp, *nowp, *towp; 1658 struct nfsclopen *op, *nop, *top; 1659 struct nfscldeleg *dp, *ndp; 1660 int ret, printed = 0; 1661 1662 /* 1663 * First, merge locally issued Opens into the list for the server. 1664 */ 1665 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1666 while (dp != NULL) { 1667 ndp = TAILQ_NEXT(dp, nfsdl_list); 1668 owp = LIST_FIRST(&dp->nfsdl_owner); 1669 while (owp != NULL) { 1670 nowp = LIST_NEXT(owp, nfsow_list); 1671 op = LIST_FIRST(&owp->nfsow_open); 1672 if (op != NULL) { 1673 if (LIST_NEXT(op, nfso_list) != NULL) 1674 panic("nfsclexp"); 1675 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1676 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1677 NFSV4CL_LOCKNAMELEN)) 1678 break; 1679 } 1680 if (towp != NULL) { 1681 /* Merge opens in */ 1682 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1683 if (top->nfso_fhlen == op->nfso_fhlen && 1684 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1685 op->nfso_fhlen)) { 1686 top->nfso_mode |= op->nfso_mode; 1687 top->nfso_opencnt += op->nfso_opencnt; 1688 break; 1689 } 1690 } 1691 if (top == NULL) { 1692 /* Just add the open to the owner list */ 1693 LIST_REMOVE(op, nfso_list); 1694 op->nfso_own = towp; 1695 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1696 nfsstatsv1.cllocalopens--; 1697 nfsstatsv1.clopens++; 1698 } 1699 } else { 1700 /* Just add the openowner to the client list */ 1701 LIST_REMOVE(owp, nfsow_list); 1702 owp->nfsow_clp = clp; 1703 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1704 nfsstatsv1.cllocalopenowners--; 1705 nfsstatsv1.clopenowners++; 1706 nfsstatsv1.cllocalopens--; 1707 nfsstatsv1.clopens++; 1708 } 1709 } 1710 owp = nowp; 1711 } 1712 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1713 printed = 1; 1714 printf("nfsv4 expired locks lost\n"); 1715 } 1716 nfscl_cleandeleg(dp); 1717 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1718 dp = ndp; 1719 } 1720 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1721 panic("nfsclexp"); 1722 1723 /* 1724 * Now, try and reopen against the server. 1725 */ 1726 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1727 owp->nfsow_seqid = 0; 1728 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1729 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1730 if (ret && !printed) { 1731 printed = 1; 1732 printf("nfsv4 expired locks lost\n"); 1733 } 1734 } 1735 if (LIST_EMPTY(&owp->nfsow_open)) 1736 nfscl_freeopenowner(owp, 0); 1737 } 1738 } 1739 1740 /* 1741 * This function must be called after the process represented by "own" has 1742 * exited. Must be called with CLSTATE lock held. 1743 */ 1744 static void 1745 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1746 { 1747 struct nfsclowner *owp, *nowp; 1748 struct nfscllockowner *lp, *nlp; 1749 struct nfscldeleg *dp; 1750 1751 /* First, get rid of local locks on delegations. */ 1752 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1753 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1754 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1755 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1756 panic("nfscllckw"); 1757 nfscl_freelockowner(lp, 1); 1758 } 1759 } 1760 } 1761 owp = LIST_FIRST(&clp->nfsc_owner); 1762 while (owp != NULL) { 1763 nowp = LIST_NEXT(owp, nfsow_list); 1764 if (!NFSBCMP(owp->nfsow_owner, own, 1765 NFSV4CL_LOCKNAMELEN)) { 1766 /* 1767 * If there are children that haven't closed the 1768 * file descriptors yet, the opens will still be 1769 * here. For that case, let the renew thread clear 1770 * out the OpenOwner later. 1771 */ 1772 if (LIST_EMPTY(&owp->nfsow_open)) 1773 nfscl_freeopenowner(owp, 0); 1774 else 1775 owp->nfsow_defunct = 1; 1776 } 1777 owp = nowp; 1778 } 1779 } 1780 1781 /* 1782 * Find open/lock owners for processes that have exited. 1783 */ 1784 static void 1785 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1786 { 1787 struct nfsclowner *owp, *nowp; 1788 struct nfsclopen *op; 1789 struct nfscllockowner *lp, *nlp; 1790 struct nfscldeleg *dp; 1791 1792 NFSPROCLISTLOCK(); 1793 NFSLOCKCLSTATE(); 1794 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1795 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1796 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1797 if (LIST_EMPTY(&lp->nfsl_lock)) 1798 nfscl_emptylockowner(lp, lhp); 1799 } 1800 } 1801 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1802 nfscl_cleanup_common(clp, owp->nfsow_owner); 1803 } 1804 1805 /* 1806 * For the single open_owner case, these lock owners need to be 1807 * checked to see if they still exist separately. 1808 * This is because nfscl_procdoesntexist() never returns true for 1809 * the single open_owner so that the above doesn't ever call 1810 * nfscl_cleanup_common(). 1811 */ 1812 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1813 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1814 if (nfscl_procdoesntexist(lp->nfsl_owner)) 1815 nfscl_cleanup_common(clp, lp->nfsl_owner); 1816 } 1817 } 1818 NFSUNLOCKCLSTATE(); 1819 NFSPROCLISTUNLOCK(); 1820 } 1821 1822 /* 1823 * Take the empty lock owner and move it to the local lhp list if the 1824 * associated process no longer exists. 1825 */ 1826 static void 1827 nfscl_emptylockowner(struct nfscllockowner *lp, 1828 struct nfscllockownerfhhead *lhp) 1829 { 1830 struct nfscllockownerfh *lfhp, *mylfhp; 1831 struct nfscllockowner *nlp; 1832 int fnd_it; 1833 1834 /* If not a Posix lock owner, just return. */ 1835 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1836 return; 1837 1838 fnd_it = 0; 1839 mylfhp = NULL; 1840 /* 1841 * First, search to see if this lock owner is already in the list. 1842 * If it is, then the associated process no longer exists. 1843 */ 1844 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1845 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1846 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1847 lfhp->nfslfh_len)) 1848 mylfhp = lfhp; 1849 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1850 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1851 NFSV4CL_LOCKNAMELEN)) 1852 fnd_it = 1; 1853 } 1854 /* If not found, check if process still exists. */ 1855 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1856 return; 1857 1858 /* Move the lock owner over to the local list. */ 1859 if (mylfhp == NULL) { 1860 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1861 M_NOWAIT); 1862 if (mylfhp == NULL) 1863 return; 1864 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1865 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1866 mylfhp->nfslfh_len); 1867 LIST_INIT(&mylfhp->nfslfh_lock); 1868 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1869 } 1870 LIST_REMOVE(lp, nfsl_list); 1871 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1872 } 1873 1874 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1875 /* 1876 * Called from nfs umount to free up the clientid. 1877 */ 1878 APPLESTATIC void 1879 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1880 { 1881 struct nfsclclient *clp; 1882 struct ucred *cred; 1883 int igotlock; 1884 1885 /* 1886 * For the case that matters, this is the thread that set 1887 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1888 * done to ensure that any thread executing nfscl_getcl() after 1889 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1890 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1891 * explanation, courtesy of Alan Cox. 1892 * What follows is a snippet from Alan Cox's email at: 1893 * http://docs.FreeBSD.org/cgi/ 1894 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1895 * 1896 * 1. Set MNTK_UNMOUNTF 1897 * 2. Acquire a standard FreeBSD mutex "m". 1898 * 3. Update some data structures. 1899 * 4. Release mutex "m". 1900 * 1901 * Then, other threads that acquire "m" after step 4 has occurred will 1902 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1903 * step 2 may or may not see MNTK_UNMOUNTF as set. 1904 */ 1905 NFSLOCKCLSTATE(); 1906 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1907 fake_global++; 1908 NFSUNLOCKCLSTATE(); 1909 NFSLOCKCLSTATE(); 1910 } 1911 1912 clp = nmp->nm_clp; 1913 if (clp != NULL) { 1914 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1915 panic("nfscl umount"); 1916 1917 /* 1918 * First, handshake with the nfscl renew thread, to terminate 1919 * it. 1920 */ 1921 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1922 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1923 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1924 "nfsclumnt", hz); 1925 1926 /* 1927 * Now, get the exclusive lock on the client state, so 1928 * that no uses of the state are still in progress. 1929 */ 1930 do { 1931 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1932 NFSCLSTATEMUTEXPTR, NULL); 1933 } while (!igotlock); 1934 NFSUNLOCKCLSTATE(); 1935 1936 /* 1937 * Free up all the state. It will expire on the server, but 1938 * maybe we should do a SetClientId/SetClientIdConfirm so 1939 * the server throws it away? 1940 */ 1941 LIST_REMOVE(clp, nfsc_list); 1942 nfscl_delegreturnall(clp, p); 1943 cred = newnfs_getcred(); 1944 if (NFSHASNFSV4N(nmp)) { 1945 (void)nfsrpc_destroysession(nmp, clp, cred, p); 1946 (void)nfsrpc_destroyclient(nmp, clp, cred, p); 1947 } else 1948 (void)nfsrpc_setclient(nmp, clp, 0, cred, p); 1949 nfscl_cleanclient(clp); 1950 nmp->nm_clp = NULL; 1951 NFSFREECRED(cred); 1952 free(clp, M_NFSCLCLIENT); 1953 } else 1954 NFSUNLOCKCLSTATE(); 1955 } 1956 1957 /* 1958 * This function is called when a server replies with NFSERR_STALECLIENTID 1959 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 1960 * doing Opens and Locks with reclaim. If these fail, it deletes the 1961 * corresponding state. 1962 */ 1963 static void 1964 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1965 { 1966 struct nfsclowner *owp, *nowp; 1967 struct nfsclopen *op, *nop; 1968 struct nfscllockowner *lp, *nlp; 1969 struct nfscllock *lop, *nlop; 1970 struct nfscldeleg *dp, *ndp, *tdp; 1971 struct nfsmount *nmp; 1972 struct ucred *tcred; 1973 struct nfsclopenhead extra_open; 1974 struct nfscldeleghead extra_deleg; 1975 struct nfsreq *rep; 1976 u_int64_t len; 1977 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1978 int i, igotlock = 0, error, trycnt, firstlock; 1979 struct nfscllayout *lyp, *nlyp; 1980 1981 /* 1982 * First, lock the client structure, so everyone else will 1983 * block when trying to use state. 1984 */ 1985 NFSLOCKCLSTATE(); 1986 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1987 do { 1988 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1989 NFSCLSTATEMUTEXPTR, NULL); 1990 } while (!igotlock); 1991 NFSUNLOCKCLSTATE(); 1992 1993 nmp = clp->nfsc_nmp; 1994 if (nmp == NULL) 1995 panic("nfscl recover"); 1996 1997 /* 1998 * For now, just get rid of all layouts. There may be a need 1999 * to do LayoutCommit Ops with reclaim == true later. 2000 */ 2001 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 2002 nfscl_freelayout(lyp); 2003 TAILQ_INIT(&clp->nfsc_layout); 2004 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 2005 LIST_INIT(&clp->nfsc_layouthash[i]); 2006 2007 trycnt = 5; 2008 do { 2009 error = nfsrpc_setclient(nmp, clp, 1, cred, p); 2010 } while ((error == NFSERR_STALECLIENTID || 2011 error == NFSERR_BADSESSION || 2012 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2013 if (error) { 2014 NFSLOCKCLSTATE(); 2015 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 2016 NFSCLFLAGS_RECVRINPROG); 2017 wakeup(&clp->nfsc_flags); 2018 nfsv4_unlock(&clp->nfsc_lock, 0); 2019 NFSUNLOCKCLSTATE(); 2020 return; 2021 } 2022 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2023 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2024 2025 /* 2026 * Mark requests already queued on the server, so that they don't 2027 * initiate another recovery cycle. Any requests already in the 2028 * queue that handle state information will have the old stale 2029 * clientid/stateid and will get a NFSERR_STALESTATEID, 2030 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 2031 * This will be translated to NFSERR_STALEDONTRECOVER when 2032 * R_DONTRECOVER is set. 2033 */ 2034 NFSLOCKREQ(); 2035 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 2036 if (rep->r_nmp == nmp) 2037 rep->r_flags |= R_DONTRECOVER; 2038 } 2039 NFSUNLOCKREQ(); 2040 2041 /* 2042 * Now, mark all delegations "need reclaim". 2043 */ 2044 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 2045 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 2046 2047 TAILQ_INIT(&extra_deleg); 2048 LIST_INIT(&extra_open); 2049 /* 2050 * Now traverse the state lists, doing Open and Lock Reclaims. 2051 */ 2052 tcred = newnfs_getcred(); 2053 owp = LIST_FIRST(&clp->nfsc_owner); 2054 while (owp != NULL) { 2055 nowp = LIST_NEXT(owp, nfsow_list); 2056 owp->nfsow_seqid = 0; 2057 op = LIST_FIRST(&owp->nfsow_open); 2058 while (op != NULL) { 2059 nop = LIST_NEXT(op, nfso_list); 2060 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2061 /* Search for a delegation to reclaim with the open */ 2062 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2063 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2064 continue; 2065 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2066 mode = NFSV4OPEN_ACCESSWRITE; 2067 delegtype = NFSV4OPEN_DELEGATEWRITE; 2068 } else { 2069 mode = NFSV4OPEN_ACCESSREAD; 2070 delegtype = NFSV4OPEN_DELEGATEREAD; 2071 } 2072 if ((op->nfso_mode & mode) == mode && 2073 op->nfso_fhlen == dp->nfsdl_fhlen && 2074 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 2075 break; 2076 } 2077 ndp = dp; 2078 if (dp == NULL) 2079 delegtype = NFSV4OPEN_DELEGATENONE; 2080 newnfs_copycred(&op->nfso_cred, tcred); 2081 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2082 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2083 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2084 tcred, p); 2085 if (!error) { 2086 /* Handle any replied delegation */ 2087 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2088 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2089 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2090 mode = NFSV4OPEN_ACCESSWRITE; 2091 else 2092 mode = NFSV4OPEN_ACCESSREAD; 2093 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2094 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2095 continue; 2096 if ((op->nfso_mode & mode) == mode && 2097 op->nfso_fhlen == dp->nfsdl_fhlen && 2098 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2099 op->nfso_fhlen)) { 2100 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2101 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2102 dp->nfsdl_ace = ndp->nfsdl_ace; 2103 dp->nfsdl_change = ndp->nfsdl_change; 2104 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2105 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2106 dp->nfsdl_flags |= NFSCLDL_RECALL; 2107 free(ndp, M_NFSCLDELEG); 2108 ndp = NULL; 2109 break; 2110 } 2111 } 2112 } 2113 if (ndp != NULL) 2114 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2115 2116 /* and reclaim all byte range locks */ 2117 lp = LIST_FIRST(&op->nfso_lock); 2118 while (lp != NULL) { 2119 nlp = LIST_NEXT(lp, nfsl_list); 2120 lp->nfsl_seqid = 0; 2121 firstlock = 1; 2122 lop = LIST_FIRST(&lp->nfsl_lock); 2123 while (lop != NULL) { 2124 nlop = LIST_NEXT(lop, nfslo_list); 2125 if (lop->nfslo_end == NFS64BITSSET) 2126 len = NFS64BITSSET; 2127 else 2128 len = lop->nfslo_end - lop->nfslo_first; 2129 error = nfscl_trylock(nmp, NULL, 2130 op->nfso_fh, op->nfso_fhlen, lp, 2131 firstlock, 1, lop->nfslo_first, len, 2132 lop->nfslo_type, tcred, p); 2133 if (error != 0) 2134 nfscl_freelock(lop, 0); 2135 else 2136 firstlock = 0; 2137 lop = nlop; 2138 } 2139 /* If no locks, but a lockowner, just delete it. */ 2140 if (LIST_EMPTY(&lp->nfsl_lock)) 2141 nfscl_freelockowner(lp, 0); 2142 lp = nlp; 2143 } 2144 } 2145 } 2146 if (error != 0 && error != NFSERR_BADSESSION) 2147 nfscl_freeopen(op, 0); 2148 op = nop; 2149 } 2150 owp = nowp; 2151 } 2152 2153 /* 2154 * Now, try and get any delegations not yet reclaimed by cobbling 2155 * to-gether an appropriate open. 2156 */ 2157 nowp = NULL; 2158 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2159 while (dp != NULL) { 2160 ndp = TAILQ_NEXT(dp, nfsdl_list); 2161 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2162 if (nowp == NULL) { 2163 nowp = malloc( 2164 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2165 /* 2166 * Name must be as long an largest possible 2167 * NFSV4CL_LOCKNAMELEN. 12 for now. 2168 */ 2169 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2170 NFSV4CL_LOCKNAMELEN); 2171 LIST_INIT(&nowp->nfsow_open); 2172 nowp->nfsow_clp = clp; 2173 nowp->nfsow_seqid = 0; 2174 nowp->nfsow_defunct = 0; 2175 nfscl_lockinit(&nowp->nfsow_rwlock); 2176 } 2177 nop = NULL; 2178 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2179 nop = malloc(sizeof (struct nfsclopen) + 2180 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2181 nop->nfso_own = nowp; 2182 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2183 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2184 delegtype = NFSV4OPEN_DELEGATEWRITE; 2185 } else { 2186 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2187 delegtype = NFSV4OPEN_DELEGATEREAD; 2188 } 2189 nop->nfso_opencnt = 0; 2190 nop->nfso_posixlock = 1; 2191 nop->nfso_fhlen = dp->nfsdl_fhlen; 2192 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2193 LIST_INIT(&nop->nfso_lock); 2194 nop->nfso_stateid.seqid = 0; 2195 nop->nfso_stateid.other[0] = 0; 2196 nop->nfso_stateid.other[1] = 0; 2197 nop->nfso_stateid.other[2] = 0; 2198 newnfs_copycred(&dp->nfsdl_cred, tcred); 2199 newnfs_copyincred(tcred, &nop->nfso_cred); 2200 tdp = NULL; 2201 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2202 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2203 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2204 delegtype, tcred, p); 2205 if (tdp != NULL) { 2206 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2207 mode = NFSV4OPEN_ACCESSWRITE; 2208 else 2209 mode = NFSV4OPEN_ACCESSREAD; 2210 if ((nop->nfso_mode & mode) == mode && 2211 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2212 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2213 nop->nfso_fhlen)) { 2214 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2215 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2216 dp->nfsdl_ace = tdp->nfsdl_ace; 2217 dp->nfsdl_change = tdp->nfsdl_change; 2218 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2219 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2220 dp->nfsdl_flags |= NFSCLDL_RECALL; 2221 free(tdp, M_NFSCLDELEG); 2222 } else { 2223 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2224 } 2225 } 2226 } 2227 if (error) { 2228 if (nop != NULL) 2229 free(nop, M_NFSCLOPEN); 2230 /* 2231 * Couldn't reclaim it, so throw the state 2232 * away. Ouch!! 2233 */ 2234 nfscl_cleandeleg(dp); 2235 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2236 } else { 2237 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2238 } 2239 } 2240 dp = ndp; 2241 } 2242 2243 /* 2244 * Now, get rid of extra Opens and Delegations. 2245 */ 2246 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2247 do { 2248 newnfs_copycred(&op->nfso_cred, tcred); 2249 error = nfscl_tryclose(op, tcred, nmp, p); 2250 if (error == NFSERR_GRACE) 2251 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2252 } while (error == NFSERR_GRACE); 2253 LIST_REMOVE(op, nfso_list); 2254 free(op, M_NFSCLOPEN); 2255 } 2256 if (nowp != NULL) 2257 free(nowp, M_NFSCLOWNER); 2258 2259 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2260 do { 2261 newnfs_copycred(&dp->nfsdl_cred, tcred); 2262 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2263 if (error == NFSERR_GRACE) 2264 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2265 } while (error == NFSERR_GRACE); 2266 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2267 free(dp, M_NFSCLDELEG); 2268 } 2269 2270 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2271 if (NFSHASNFSV4N(nmp)) 2272 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2273 2274 NFSLOCKCLSTATE(); 2275 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2276 wakeup(&clp->nfsc_flags); 2277 nfsv4_unlock(&clp->nfsc_lock, 0); 2278 NFSUNLOCKCLSTATE(); 2279 NFSFREECRED(tcred); 2280 } 2281 2282 /* 2283 * This function is called when a server replies with NFSERR_EXPIRED. 2284 * It deletes all state for the client and does a fresh SetClientId/confirm. 2285 * XXX Someday it should post a signal to the process(es) that hold the 2286 * state, so they know that lock state has been lost. 2287 */ 2288 APPLESTATIC int 2289 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2290 { 2291 struct nfsmount *nmp; 2292 struct ucred *cred; 2293 int igotlock = 0, error, trycnt; 2294 2295 /* 2296 * If the clientid has gone away or a new SetClientid has already 2297 * been done, just return ok. 2298 */ 2299 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2300 return (0); 2301 2302 /* 2303 * First, lock the client structure, so everyone else will 2304 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2305 * that only one thread does the work. 2306 */ 2307 NFSLOCKCLSTATE(); 2308 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2309 do { 2310 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2311 NFSCLSTATEMUTEXPTR, NULL); 2312 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2313 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2314 if (igotlock) 2315 nfsv4_unlock(&clp->nfsc_lock, 0); 2316 NFSUNLOCKCLSTATE(); 2317 return (0); 2318 } 2319 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2320 NFSUNLOCKCLSTATE(); 2321 2322 nmp = clp->nfsc_nmp; 2323 if (nmp == NULL) 2324 panic("nfscl expired"); 2325 cred = newnfs_getcred(); 2326 trycnt = 5; 2327 do { 2328 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 2329 } while ((error == NFSERR_STALECLIENTID || 2330 error == NFSERR_BADSESSION || 2331 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2332 if (error) { 2333 NFSLOCKCLSTATE(); 2334 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2335 } else { 2336 /* 2337 * Expire the state for the client. 2338 */ 2339 nfscl_expireclient(clp, nmp, cred, p); 2340 NFSLOCKCLSTATE(); 2341 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2342 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2343 } 2344 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2345 wakeup(&clp->nfsc_flags); 2346 nfsv4_unlock(&clp->nfsc_lock, 0); 2347 NFSUNLOCKCLSTATE(); 2348 NFSFREECRED(cred); 2349 return (error); 2350 } 2351 2352 /* 2353 * This function inserts a lock in the list after insert_lop. 2354 */ 2355 static void 2356 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2357 struct nfscllock *insert_lop, int local) 2358 { 2359 2360 if ((struct nfscllockowner *)insert_lop == lp) 2361 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2362 else 2363 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2364 if (local) 2365 nfsstatsv1.cllocallocks++; 2366 else 2367 nfsstatsv1.cllocks++; 2368 } 2369 2370 /* 2371 * This function updates the locking for a lock owner and given file. It 2372 * maintains a list of lock ranges ordered on increasing file offset that 2373 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2374 * It always adds new_lop to the list and sometimes uses the one pointed 2375 * at by other_lopp. 2376 * Returns 1 if the locks were modified, 0 otherwise. 2377 */ 2378 static int 2379 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2380 struct nfscllock **other_lopp, int local) 2381 { 2382 struct nfscllock *new_lop = *new_lopp; 2383 struct nfscllock *lop, *tlop, *ilop; 2384 struct nfscllock *other_lop; 2385 int unlock = 0, modified = 0; 2386 u_int64_t tmp; 2387 2388 /* 2389 * Work down the list until the lock is merged. 2390 */ 2391 if (new_lop->nfslo_type == F_UNLCK) 2392 unlock = 1; 2393 ilop = (struct nfscllock *)lp; 2394 lop = LIST_FIRST(&lp->nfsl_lock); 2395 while (lop != NULL) { 2396 /* 2397 * Only check locks for this file that aren't before the start of 2398 * new lock's range. 2399 */ 2400 if (lop->nfslo_end >= new_lop->nfslo_first) { 2401 if (new_lop->nfslo_end < lop->nfslo_first) { 2402 /* 2403 * If the new lock ends before the start of the 2404 * current lock's range, no merge, just insert 2405 * the new lock. 2406 */ 2407 break; 2408 } 2409 if (new_lop->nfslo_type == lop->nfslo_type || 2410 (new_lop->nfslo_first <= lop->nfslo_first && 2411 new_lop->nfslo_end >= lop->nfslo_end)) { 2412 /* 2413 * This lock can be absorbed by the new lock/unlock. 2414 * This happens when it covers the entire range 2415 * of the old lock or is contiguous 2416 * with the old lock and is of the same type or an 2417 * unlock. 2418 */ 2419 if (new_lop->nfslo_type != lop->nfslo_type || 2420 new_lop->nfslo_first != lop->nfslo_first || 2421 new_lop->nfslo_end != lop->nfslo_end) 2422 modified = 1; 2423 if (lop->nfslo_first < new_lop->nfslo_first) 2424 new_lop->nfslo_first = lop->nfslo_first; 2425 if (lop->nfslo_end > new_lop->nfslo_end) 2426 new_lop->nfslo_end = lop->nfslo_end; 2427 tlop = lop; 2428 lop = LIST_NEXT(lop, nfslo_list); 2429 nfscl_freelock(tlop, local); 2430 continue; 2431 } 2432 2433 /* 2434 * All these cases are for contiguous locks that are not the 2435 * same type, so they can't be merged. 2436 */ 2437 if (new_lop->nfslo_first <= lop->nfslo_first) { 2438 /* 2439 * This case is where the new lock overlaps with the 2440 * first part of the old lock. Move the start of the 2441 * old lock to just past the end of the new lock. The 2442 * new lock will be inserted in front of the old, since 2443 * ilop hasn't been updated. (We are done now.) 2444 */ 2445 if (lop->nfslo_first != new_lop->nfslo_end) { 2446 lop->nfslo_first = new_lop->nfslo_end; 2447 modified = 1; 2448 } 2449 break; 2450 } 2451 if (new_lop->nfslo_end >= lop->nfslo_end) { 2452 /* 2453 * This case is where the new lock overlaps with the 2454 * end of the old lock's range. Move the old lock's 2455 * end to just before the new lock's first and insert 2456 * the new lock after the old lock. 2457 * Might not be done yet, since the new lock could 2458 * overlap further locks with higher ranges. 2459 */ 2460 if (lop->nfslo_end != new_lop->nfslo_first) { 2461 lop->nfslo_end = new_lop->nfslo_first; 2462 modified = 1; 2463 } 2464 ilop = lop; 2465 lop = LIST_NEXT(lop, nfslo_list); 2466 continue; 2467 } 2468 /* 2469 * The final case is where the new lock's range is in the 2470 * middle of the current lock's and splits the current lock 2471 * up. Use *other_lopp to handle the second part of the 2472 * split old lock range. (We are done now.) 2473 * For unlock, we use new_lop as other_lop and tmp, since 2474 * other_lop and new_lop are the same for this case. 2475 * We noted the unlock case above, so we don't need 2476 * new_lop->nfslo_type any longer. 2477 */ 2478 tmp = new_lop->nfslo_first; 2479 if (unlock) { 2480 other_lop = new_lop; 2481 *new_lopp = NULL; 2482 } else { 2483 other_lop = *other_lopp; 2484 *other_lopp = NULL; 2485 } 2486 other_lop->nfslo_first = new_lop->nfslo_end; 2487 other_lop->nfslo_end = lop->nfslo_end; 2488 other_lop->nfslo_type = lop->nfslo_type; 2489 lop->nfslo_end = tmp; 2490 nfscl_insertlock(lp, other_lop, lop, local); 2491 ilop = lop; 2492 modified = 1; 2493 break; 2494 } 2495 ilop = lop; 2496 lop = LIST_NEXT(lop, nfslo_list); 2497 if (lop == NULL) 2498 break; 2499 } 2500 2501 /* 2502 * Insert the new lock in the list at the appropriate place. 2503 */ 2504 if (!unlock) { 2505 nfscl_insertlock(lp, new_lop, ilop, local); 2506 *new_lopp = NULL; 2507 modified = 1; 2508 } 2509 return (modified); 2510 } 2511 2512 /* 2513 * This function must be run as a kernel thread. 2514 * It does Renew Ops and recovery, when required. 2515 */ 2516 APPLESTATIC void 2517 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2518 { 2519 struct nfsclowner *owp, *nowp; 2520 struct nfsclopen *op; 2521 struct nfscllockowner *lp, *nlp; 2522 struct nfscldeleghead dh; 2523 struct nfscldeleg *dp, *ndp; 2524 struct ucred *cred; 2525 u_int32_t clidrev; 2526 int error, cbpathdown, islept, igotlock, ret, clearok; 2527 uint32_t recover_done_time = 0; 2528 time_t mytime; 2529 static time_t prevsec = 0; 2530 struct nfscllockownerfh *lfhp, *nlfhp; 2531 struct nfscllockownerfhhead lfh; 2532 struct nfscllayout *lyp, *nlyp; 2533 struct nfscldevinfo *dip, *ndip; 2534 struct nfscllayouthead rlh; 2535 struct nfsclrecalllayout *recallp; 2536 struct nfsclds *dsp; 2537 2538 cred = newnfs_getcred(); 2539 NFSLOCKCLSTATE(); 2540 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2541 NFSUNLOCKCLSTATE(); 2542 for(;;) { 2543 newnfs_setroot(cred); 2544 cbpathdown = 0; 2545 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2546 /* 2547 * Only allow one recover within 1/2 of the lease 2548 * duration (nfsc_renew). 2549 */ 2550 if (recover_done_time < NFSD_MONOSEC) { 2551 recover_done_time = NFSD_MONOSEC + 2552 clp->nfsc_renew; 2553 NFSCL_DEBUG(1, "Doing recovery..\n"); 2554 nfscl_recover(clp, cred, p); 2555 } else { 2556 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n", 2557 recover_done_time, (intmax_t)NFSD_MONOSEC); 2558 NFSLOCKCLSTATE(); 2559 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2560 NFSUNLOCKCLSTATE(); 2561 } 2562 } 2563 if (clp->nfsc_expire <= NFSD_MONOSEC && 2564 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2565 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2566 clidrev = clp->nfsc_clientidrev; 2567 error = nfsrpc_renew(clp, NULL, cred, p); 2568 if (error == NFSERR_CBPATHDOWN) 2569 cbpathdown = 1; 2570 else if (error == NFSERR_STALECLIENTID || 2571 error == NFSERR_BADSESSION) { 2572 NFSLOCKCLSTATE(); 2573 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2574 NFSUNLOCKCLSTATE(); 2575 } else if (error == NFSERR_EXPIRED) 2576 (void) nfscl_hasexpired(clp, clidrev, p); 2577 } 2578 2579 checkdsrenew: 2580 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2581 /* Do renews for any DS sessions. */ 2582 NFSLOCKMNT(clp->nfsc_nmp); 2583 /* Skip first entry, since the MDS is handled above. */ 2584 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2585 if (dsp != NULL) 2586 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2587 while (dsp != NULL) { 2588 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2589 dsp->nfsclds_sess.nfsess_defunct == 0) { 2590 dsp->nfsclds_expire = NFSD_MONOSEC + 2591 clp->nfsc_renew; 2592 NFSUNLOCKMNT(clp->nfsc_nmp); 2593 (void)nfsrpc_renew(clp, dsp, cred, p); 2594 goto checkdsrenew; 2595 } 2596 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2597 } 2598 NFSUNLOCKMNT(clp->nfsc_nmp); 2599 } 2600 2601 TAILQ_INIT(&dh); 2602 NFSLOCKCLSTATE(); 2603 if (cbpathdown) 2604 /* It's a Total Recall! */ 2605 nfscl_totalrecall(clp); 2606 2607 /* 2608 * Now, handle defunct owners. 2609 */ 2610 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2611 if (LIST_EMPTY(&owp->nfsow_open)) { 2612 if (owp->nfsow_defunct != 0) 2613 nfscl_freeopenowner(owp, 0); 2614 } 2615 } 2616 2617 /* 2618 * Do the recall on any delegations. To avoid trouble, always 2619 * come back up here after having slept. 2620 */ 2621 igotlock = 0; 2622 tryagain: 2623 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2624 while (dp != NULL) { 2625 ndp = TAILQ_NEXT(dp, nfsdl_list); 2626 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2627 /* 2628 * Wait for outstanding I/O ops to be done. 2629 */ 2630 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2631 if (igotlock) { 2632 nfsv4_unlock(&clp->nfsc_lock, 0); 2633 igotlock = 0; 2634 } 2635 dp->nfsdl_rwlock.nfslock_lock |= 2636 NFSV4LOCK_WANTED; 2637 (void) nfsmsleep(&dp->nfsdl_rwlock, 2638 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2639 NULL); 2640 goto tryagain; 2641 } 2642 while (!igotlock) { 2643 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2644 &islept, NFSCLSTATEMUTEXPTR, NULL); 2645 if (islept) 2646 goto tryagain; 2647 } 2648 NFSUNLOCKCLSTATE(); 2649 newnfs_copycred(&dp->nfsdl_cred, cred); 2650 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2651 NULL, cred, p, 1); 2652 if (!ret) { 2653 nfscl_cleandeleg(dp); 2654 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2655 nfsdl_list); 2656 LIST_REMOVE(dp, nfsdl_hash); 2657 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2658 nfscl_delegcnt--; 2659 nfsstatsv1.cldelegates--; 2660 } 2661 NFSLOCKCLSTATE(); 2662 } 2663 dp = ndp; 2664 } 2665 2666 /* 2667 * Clear out old delegations, if we are above the high water 2668 * mark. Only clear out ones with no state related to them. 2669 * The tailq list is in LRU order. 2670 */ 2671 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2672 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2673 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2674 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2675 dp->nfsdl_rwlock.nfslock_lock == 0 && 2676 dp->nfsdl_timestamp < NFSD_MONOSEC && 2677 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2678 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2679 clearok = 1; 2680 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2681 op = LIST_FIRST(&owp->nfsow_open); 2682 if (op != NULL) { 2683 clearok = 0; 2684 break; 2685 } 2686 } 2687 if (clearok) { 2688 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2689 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2690 clearok = 0; 2691 break; 2692 } 2693 } 2694 } 2695 if (clearok) { 2696 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2697 LIST_REMOVE(dp, nfsdl_hash); 2698 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2699 nfscl_delegcnt--; 2700 nfsstatsv1.cldelegates--; 2701 } 2702 } 2703 dp = ndp; 2704 } 2705 if (igotlock) 2706 nfsv4_unlock(&clp->nfsc_lock, 0); 2707 2708 /* 2709 * Do the recall on any layouts. To avoid trouble, always 2710 * come back up here after having slept. 2711 */ 2712 TAILQ_INIT(&rlh); 2713 tryagain2: 2714 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2715 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2716 /* 2717 * Wait for outstanding I/O ops to be done. 2718 */ 2719 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2720 (lyp->nfsly_lock.nfslock_lock & 2721 NFSV4LOCK_LOCK) != 0) { 2722 lyp->nfsly_lock.nfslock_lock |= 2723 NFSV4LOCK_WANTED; 2724 nfsmsleep(&lyp->nfsly_lock.nfslock_lock, 2725 NFSCLSTATEMUTEXPTR, PZERO, "nfslyp", 2726 NULL); 2727 goto tryagain2; 2728 } 2729 /* Move the layout to the recall list. */ 2730 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2731 nfsly_list); 2732 LIST_REMOVE(lyp, nfsly_hash); 2733 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2734 2735 /* Handle any layout commits. */ 2736 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2737 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2738 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2739 NFSUNLOCKCLSTATE(); 2740 NFSCL_DEBUG(3, "do layoutcommit\n"); 2741 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2742 cred, p); 2743 NFSLOCKCLSTATE(); 2744 goto tryagain2; 2745 } 2746 } 2747 } 2748 2749 /* Now, look for stale layouts. */ 2750 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2751 while (lyp != NULL) { 2752 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2753 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2754 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2755 lyp->nfsly_lock.nfslock_usecnt == 0 && 2756 lyp->nfsly_lock.nfslock_lock == 0) { 2757 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2758 nfscl_layoutcnt); 2759 recallp = malloc(sizeof(*recallp), 2760 M_NFSLAYRECALL, M_NOWAIT); 2761 if (recallp == NULL) 2762 break; 2763 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2764 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2765 lyp->nfsly_stateid.seqid, recallp); 2766 } 2767 lyp = nlyp; 2768 } 2769 2770 /* 2771 * Free up any unreferenced device info structures. 2772 */ 2773 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 2774 if (dip->nfsdi_layoutrefs == 0 && 2775 dip->nfsdi_refcnt == 0) { 2776 NFSCL_DEBUG(4, "freeing devinfo\n"); 2777 LIST_REMOVE(dip, nfsdi_list); 2778 nfscl_freedevinfo(dip); 2779 } 2780 } 2781 NFSUNLOCKCLSTATE(); 2782 2783 /* Do layout return(s), as required. */ 2784 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 2785 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 2786 NFSCL_DEBUG(4, "ret layout\n"); 2787 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 2788 nfscl_freelayout(lyp); 2789 } 2790 2791 /* 2792 * Delegreturn any delegations cleaned out or recalled. 2793 */ 2794 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2795 newnfs_copycred(&dp->nfsdl_cred, cred); 2796 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2797 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2798 free(dp, M_NFSCLDELEG); 2799 } 2800 2801 SLIST_INIT(&lfh); 2802 /* 2803 * Call nfscl_cleanupkext() once per second to check for 2804 * open/lock owners where the process has exited. 2805 */ 2806 mytime = NFSD_MONOSEC; 2807 if (prevsec != mytime) { 2808 prevsec = mytime; 2809 nfscl_cleanupkext(clp, &lfh); 2810 } 2811 2812 /* 2813 * Do a ReleaseLockOwner for all lock owners where the 2814 * associated process no longer exists, as found by 2815 * nfscl_cleanupkext(). 2816 */ 2817 newnfs_setroot(cred); 2818 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2819 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2820 nlp) { 2821 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2822 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2823 p); 2824 nfscl_freelockowner(lp, 0); 2825 } 2826 free(lfhp, M_TEMP); 2827 } 2828 SLIST_INIT(&lfh); 2829 2830 NFSLOCKCLSTATE(); 2831 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2832 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2833 hz); 2834 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2835 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2836 NFSUNLOCKCLSTATE(); 2837 NFSFREECRED(cred); 2838 wakeup((caddr_t)clp); 2839 return; 2840 } 2841 NFSUNLOCKCLSTATE(); 2842 } 2843 } 2844 2845 /* 2846 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 2847 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 2848 */ 2849 APPLESTATIC void 2850 nfscl_initiate_recovery(struct nfsclclient *clp) 2851 { 2852 2853 if (clp == NULL) 2854 return; 2855 NFSLOCKCLSTATE(); 2856 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2857 NFSUNLOCKCLSTATE(); 2858 wakeup((caddr_t)clp); 2859 } 2860 2861 /* 2862 * Dump out the state stuff for debugging. 2863 */ 2864 APPLESTATIC void 2865 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2866 int lockowner, int locks) 2867 { 2868 struct nfsclclient *clp; 2869 struct nfsclowner *owp; 2870 struct nfsclopen *op; 2871 struct nfscllockowner *lp; 2872 struct nfscllock *lop; 2873 struct nfscldeleg *dp; 2874 2875 clp = nmp->nm_clp; 2876 if (clp == NULL) { 2877 printf("nfscl dumpstate NULL clp\n"); 2878 return; 2879 } 2880 NFSLOCKCLSTATE(); 2881 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2882 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2883 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2884 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2885 owp->nfsow_owner[0], owp->nfsow_owner[1], 2886 owp->nfsow_owner[2], owp->nfsow_owner[3], 2887 owp->nfsow_seqid); 2888 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2889 if (opens) 2890 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2891 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2892 op->nfso_stateid.other[2], op->nfso_opencnt, 2893 op->nfso_fh[12]); 2894 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2895 if (lockowner) 2896 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2897 lp->nfsl_owner[0], lp->nfsl_owner[1], 2898 lp->nfsl_owner[2], lp->nfsl_owner[3], 2899 lp->nfsl_seqid, 2900 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2901 lp->nfsl_stateid.other[2]); 2902 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2903 if (locks) 2904 #ifdef __FreeBSD__ 2905 printf("lck typ=%d fst=%ju end=%ju\n", 2906 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2907 (intmax_t)lop->nfslo_end); 2908 #else 2909 printf("lck typ=%d fst=%qd end=%qd\n", 2910 lop->nfslo_type, lop->nfslo_first, 2911 lop->nfslo_end); 2912 #endif 2913 } 2914 } 2915 } 2916 } 2917 } 2918 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2919 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2920 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2921 owp->nfsow_owner[0], owp->nfsow_owner[1], 2922 owp->nfsow_owner[2], owp->nfsow_owner[3], 2923 owp->nfsow_seqid); 2924 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2925 if (opens) 2926 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2927 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2928 op->nfso_stateid.other[2], op->nfso_opencnt, 2929 op->nfso_fh[12]); 2930 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2931 if (lockowner) 2932 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2933 lp->nfsl_owner[0], lp->nfsl_owner[1], 2934 lp->nfsl_owner[2], lp->nfsl_owner[3], 2935 lp->nfsl_seqid, 2936 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2937 lp->nfsl_stateid.other[2]); 2938 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2939 if (locks) 2940 #ifdef __FreeBSD__ 2941 printf("lck typ=%d fst=%ju end=%ju\n", 2942 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2943 (intmax_t)lop->nfslo_end); 2944 #else 2945 printf("lck typ=%d fst=%qd end=%qd\n", 2946 lop->nfslo_type, lop->nfslo_first, 2947 lop->nfslo_end); 2948 #endif 2949 } 2950 } 2951 } 2952 } 2953 NFSUNLOCKCLSTATE(); 2954 } 2955 2956 /* 2957 * Check for duplicate open owners and opens. 2958 * (Only used as a diagnostic aid.) 2959 */ 2960 APPLESTATIC void 2961 nfscl_dupopen(vnode_t vp, int dupopens) 2962 { 2963 struct nfsclclient *clp; 2964 struct nfsclowner *owp, *owp2; 2965 struct nfsclopen *op, *op2; 2966 struct nfsfh *nfhp; 2967 2968 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2969 if (clp == NULL) { 2970 printf("nfscl dupopen NULL clp\n"); 2971 return; 2972 } 2973 nfhp = VTONFS(vp)->n_fhp; 2974 NFSLOCKCLSTATE(); 2975 2976 /* 2977 * First, search for duplicate owners. 2978 * These should never happen! 2979 */ 2980 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2981 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2982 if (owp != owp2 && 2983 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2984 NFSV4CL_LOCKNAMELEN)) { 2985 NFSUNLOCKCLSTATE(); 2986 printf("DUP OWNER\n"); 2987 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2988 return; 2989 } 2990 } 2991 } 2992 2993 /* 2994 * Now, search for duplicate stateids. 2995 * These shouldn't happen, either. 2996 */ 2997 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2998 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2999 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3000 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3001 if (op != op2 && 3002 (op->nfso_stateid.other[0] != 0 || 3003 op->nfso_stateid.other[1] != 0 || 3004 op->nfso_stateid.other[2] != 0) && 3005 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 3006 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 3007 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 3008 NFSUNLOCKCLSTATE(); 3009 printf("DUP STATEID\n"); 3010 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 3011 0); 3012 return; 3013 } 3014 } 3015 } 3016 } 3017 } 3018 3019 /* 3020 * Now search for duplicate opens. 3021 * Duplicate opens for the same owner 3022 * should never occur. Other duplicates are 3023 * possible and are checked for if "dupopens" 3024 * is true. 3025 */ 3026 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3027 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3028 if (nfhp->nfh_len == op2->nfso_fhlen && 3029 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 3030 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3031 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3032 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 3033 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 3034 (!NFSBCMP(op->nfso_own->nfsow_owner, 3035 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 3036 dupopens)) { 3037 if (!NFSBCMP(op->nfso_own->nfsow_owner, 3038 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3039 NFSUNLOCKCLSTATE(); 3040 printf("BADDUP OPEN\n"); 3041 } else { 3042 NFSUNLOCKCLSTATE(); 3043 printf("DUP OPEN\n"); 3044 } 3045 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 3046 0, 0); 3047 return; 3048 } 3049 } 3050 } 3051 } 3052 } 3053 } 3054 NFSUNLOCKCLSTATE(); 3055 } 3056 3057 /* 3058 * During close, find an open that needs to be dereferenced and 3059 * dereference it. If there are no more opens for this file, 3060 * log a message to that effect. 3061 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 3062 * on the file's vnode. 3063 * This is the safe way, since it is difficult to identify 3064 * which open the close is for and I/O can be performed after the 3065 * close(2) system call when a file is mmap'd. 3066 * If it returns 0 for success, there will be a referenced 3067 * clp returned via clpp. 3068 */ 3069 APPLESTATIC int 3070 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 3071 { 3072 struct nfsclclient *clp; 3073 struct nfsclowner *owp; 3074 struct nfsclopen *op; 3075 struct nfscldeleg *dp; 3076 struct nfsfh *nfhp; 3077 int error, notdecr; 3078 3079 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3080 if (error) 3081 return (error); 3082 *clpp = clp; 3083 3084 nfhp = VTONFS(vp)->n_fhp; 3085 notdecr = 1; 3086 NFSLOCKCLSTATE(); 3087 /* 3088 * First, look for one under a delegation that was locally issued 3089 * and just decrement the opencnt for it. Since all my Opens against 3090 * the server are DENY_NONE, I don't see a problem with hanging 3091 * onto them. (It is much easier to use one of the extant Opens 3092 * that I already have on the server when a Delegation is recalled 3093 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3094 */ 3095 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3096 if (dp != NULL) { 3097 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3098 op = LIST_FIRST(&owp->nfsow_open); 3099 if (op != NULL) { 3100 /* 3101 * Since a delegation is for a file, there 3102 * should never be more than one open for 3103 * each openowner. 3104 */ 3105 if (LIST_NEXT(op, nfso_list) != NULL) 3106 panic("nfscdeleg opens"); 3107 if (notdecr && op->nfso_opencnt > 0) { 3108 notdecr = 0; 3109 op->nfso_opencnt--; 3110 break; 3111 } 3112 } 3113 } 3114 } 3115 3116 /* Now process the opens against the server. */ 3117 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3118 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3119 if (op->nfso_fhlen == nfhp->nfh_len && 3120 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3121 nfhp->nfh_len)) { 3122 /* Found an open, decrement cnt if possible */ 3123 if (notdecr && op->nfso_opencnt > 0) { 3124 notdecr = 0; 3125 op->nfso_opencnt--; 3126 } 3127 /* 3128 * There are more opens, so just return. 3129 */ 3130 if (op->nfso_opencnt > 0) { 3131 NFSUNLOCKCLSTATE(); 3132 return (0); 3133 } 3134 } 3135 } 3136 } 3137 NFSUNLOCKCLSTATE(); 3138 if (notdecr) 3139 printf("nfscl: never fnd open\n"); 3140 return (0); 3141 } 3142 3143 APPLESTATIC int 3144 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3145 { 3146 struct nfsclclient *clp; 3147 struct nfsclowner *owp, *nowp; 3148 struct nfsclopen *op; 3149 struct nfscldeleg *dp; 3150 struct nfsfh *nfhp; 3151 struct nfsclrecalllayout *recallp; 3152 int error; 3153 3154 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3155 if (error) 3156 return (error); 3157 *clpp = clp; 3158 3159 nfhp = VTONFS(vp)->n_fhp; 3160 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 3161 NFSLOCKCLSTATE(); 3162 /* 3163 * First get rid of the local Open structures, which should be no 3164 * longer in use. 3165 */ 3166 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3167 if (dp != NULL) { 3168 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3169 op = LIST_FIRST(&owp->nfsow_open); 3170 if (op != NULL) { 3171 KASSERT((op->nfso_opencnt == 0), 3172 ("nfscl: bad open cnt on deleg")); 3173 nfscl_freeopen(op, 1); 3174 } 3175 nfscl_freeopenowner(owp, 1); 3176 } 3177 } 3178 3179 /* Return any layouts marked return on close. */ 3180 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp); 3181 3182 /* Now process the opens against the server. */ 3183 lookformore: 3184 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3185 op = LIST_FIRST(&owp->nfsow_open); 3186 while (op != NULL) { 3187 if (op->nfso_fhlen == nfhp->nfh_len && 3188 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3189 nfhp->nfh_len)) { 3190 /* Found an open, close it. */ 3191 KASSERT((op->nfso_opencnt == 0), 3192 ("nfscl: bad open cnt on server")); 3193 NFSUNLOCKCLSTATE(); 3194 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 3195 p); 3196 NFSLOCKCLSTATE(); 3197 goto lookformore; 3198 } 3199 op = LIST_NEXT(op, nfso_list); 3200 } 3201 } 3202 NFSUNLOCKCLSTATE(); 3203 /* 3204 * recallp has been set NULL by nfscl_retoncloselayout() if it was 3205 * used by the function, but calling free() with a NULL pointer is ok. 3206 */ 3207 free(recallp, M_NFSLAYRECALL); 3208 return (0); 3209 } 3210 3211 /* 3212 * Return all delegations on this client. 3213 * (Must be called with client sleep lock.) 3214 */ 3215 static void 3216 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3217 { 3218 struct nfscldeleg *dp, *ndp; 3219 struct ucred *cred; 3220 3221 cred = newnfs_getcred(); 3222 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3223 nfscl_cleandeleg(dp); 3224 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3225 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3226 } 3227 NFSFREECRED(cred); 3228 } 3229 3230 /* 3231 * Do a callback RPC. 3232 */ 3233 APPLESTATIC void 3234 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3235 { 3236 int clist, gotseq_ok, i, j, k, op, rcalls; 3237 u_int32_t *tl; 3238 struct nfsclclient *clp; 3239 struct nfscldeleg *dp = NULL; 3240 int numops, taglen = -1, error = 0, trunc; 3241 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3242 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3243 vnode_t vp = NULL; 3244 struct nfsnode *np; 3245 struct vattr va; 3246 struct nfsfh *nfhp; 3247 mount_t mp; 3248 nfsattrbit_t attrbits, rattrbits; 3249 nfsv4stateid_t stateid; 3250 uint32_t seqid, slotid = 0, highslot, cachethis; 3251 uint8_t sessionid[NFSX_V4SESSIONID]; 3252 struct mbuf *rep; 3253 struct nfscllayout *lyp; 3254 uint64_t filesid[2], len, off; 3255 int changed, gotone, laytype, recalltype; 3256 uint32_t iomode; 3257 struct nfsclrecalllayout *recallp = NULL; 3258 struct nfsclsession *tsep; 3259 3260 gotseq_ok = 0; 3261 nfsrvd_rephead(nd); 3262 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3263 taglen = fxdr_unsigned(int, *tl); 3264 if (taglen < 0) { 3265 error = EBADRPC; 3266 goto nfsmout; 3267 } 3268 if (taglen <= NFSV4_SMALLSTR) 3269 tagstr = tag; 3270 else 3271 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3272 error = nfsrv_mtostr(nd, tagstr, taglen); 3273 if (error) { 3274 if (taglen > NFSV4_SMALLSTR) 3275 free(tagstr, M_TEMP); 3276 taglen = -1; 3277 goto nfsmout; 3278 } 3279 (void) nfsm_strtom(nd, tag, taglen); 3280 if (taglen > NFSV4_SMALLSTR) { 3281 free(tagstr, M_TEMP); 3282 } 3283 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3284 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3285 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3286 if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION) 3287 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3288 cbident = fxdr_unsigned(u_int32_t, *tl++); 3289 if (nd->nd_repstat) 3290 numops = 0; 3291 else 3292 numops = fxdr_unsigned(int, *tl); 3293 /* 3294 * Loop around doing the sub ops. 3295 */ 3296 for (i = 0; i < numops; i++) { 3297 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3298 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3299 *repp++ = *tl; 3300 op = fxdr_unsigned(int, *tl); 3301 if (op < NFSV4OP_CBGETATTR || 3302 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3303 (op > NFSV4OP_CBNOTIFYDEVID && 3304 minorvers == NFSV41_MINORVERSION)) { 3305 nd->nd_repstat = NFSERR_OPILLEGAL; 3306 *repp = nfscl_errmap(nd, minorvers); 3307 retops++; 3308 break; 3309 } 3310 nd->nd_procnum = op; 3311 if (op < NFSV41_CBNOPS) 3312 nfsstatsv1.cbrpccnt[nd->nd_procnum]++; 3313 switch (op) { 3314 case NFSV4OP_CBGETATTR: 3315 NFSCL_DEBUG(4, "cbgetattr\n"); 3316 mp = NULL; 3317 vp = NULL; 3318 error = nfsm_getfh(nd, &nfhp); 3319 if (!error) 3320 error = nfsrv_getattrbits(nd, &attrbits, 3321 NULL, NULL); 3322 if (error == 0 && i == 0 && 3323 minorvers != NFSV4_MINORVERSION) 3324 error = NFSERR_OPNOTINSESS; 3325 if (!error) { 3326 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3327 &clp); 3328 if (mp == NULL) 3329 error = NFSERR_SERVERFAULT; 3330 } 3331 if (!error) { 3332 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3333 nfhp->nfh_len, p, &np); 3334 if (!error) 3335 vp = NFSTOV(np); 3336 } 3337 if (!error) { 3338 NFSZERO_ATTRBIT(&rattrbits); 3339 NFSLOCKCLSTATE(); 3340 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3341 nfhp->nfh_len); 3342 if (dp != NULL) { 3343 if (NFSISSET_ATTRBIT(&attrbits, 3344 NFSATTRBIT_SIZE)) { 3345 if (vp != NULL) 3346 va.va_size = np->n_size; 3347 else 3348 va.va_size = 3349 dp->nfsdl_size; 3350 NFSSETBIT_ATTRBIT(&rattrbits, 3351 NFSATTRBIT_SIZE); 3352 } 3353 if (NFSISSET_ATTRBIT(&attrbits, 3354 NFSATTRBIT_CHANGE)) { 3355 va.va_filerev = 3356 dp->nfsdl_change; 3357 if (vp == NULL || 3358 (np->n_flag & NDELEGMOD)) 3359 va.va_filerev++; 3360 NFSSETBIT_ATTRBIT(&rattrbits, 3361 NFSATTRBIT_CHANGE); 3362 } 3363 } else 3364 error = NFSERR_SERVERFAULT; 3365 NFSUNLOCKCLSTATE(); 3366 } 3367 if (vp != NULL) 3368 vrele(vp); 3369 if (mp != NULL) 3370 vfs_unbusy(mp); 3371 if (nfhp != NULL) 3372 free(nfhp, M_NFSFH); 3373 if (!error) 3374 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3375 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3376 (uint64_t)0); 3377 break; 3378 case NFSV4OP_CBRECALL: 3379 NFSCL_DEBUG(4, "cbrecall\n"); 3380 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3381 NFSX_UNSIGNED); 3382 stateid.seqid = *tl++; 3383 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3384 NFSX_STATEIDOTHER); 3385 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3386 trunc = fxdr_unsigned(int, *tl); 3387 error = nfsm_getfh(nd, &nfhp); 3388 if (error == 0 && i == 0 && 3389 minorvers != NFSV4_MINORVERSION) 3390 error = NFSERR_OPNOTINSESS; 3391 if (!error) { 3392 NFSLOCKCLSTATE(); 3393 if (minorvers == NFSV4_MINORVERSION) 3394 clp = nfscl_getclnt(cbident); 3395 else 3396 clp = nfscl_getclntsess(sessionid); 3397 if (clp != NULL) { 3398 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3399 nfhp->nfh_len); 3400 if (dp != NULL && (dp->nfsdl_flags & 3401 NFSCLDL_DELEGRET) == 0) { 3402 dp->nfsdl_flags |= 3403 NFSCLDL_RECALL; 3404 wakeup((caddr_t)clp); 3405 } 3406 } else { 3407 error = NFSERR_SERVERFAULT; 3408 } 3409 NFSUNLOCKCLSTATE(); 3410 } 3411 if (nfhp != NULL) 3412 free(nfhp, M_NFSFH); 3413 break; 3414 case NFSV4OP_CBLAYOUTRECALL: 3415 NFSCL_DEBUG(4, "cblayrec\n"); 3416 nfhp = NULL; 3417 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3418 laytype = fxdr_unsigned(int, *tl++); 3419 iomode = fxdr_unsigned(uint32_t, *tl++); 3420 if (newnfs_true == *tl++) 3421 changed = 1; 3422 else 3423 changed = 0; 3424 recalltype = fxdr_unsigned(int, *tl); 3425 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n", 3426 laytype, iomode, changed, recalltype); 3427 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3428 M_WAITOK); 3429 if (laytype != NFSLAYOUT_NFSV4_1_FILES && 3430 laytype != NFSLAYOUT_FLEXFILE) 3431 error = NFSERR_NOMATCHLAYOUT; 3432 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3433 error = nfsm_getfh(nd, &nfhp); 3434 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3435 if (error != 0) 3436 goto nfsmout; 3437 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3438 NFSX_STATEID); 3439 off = fxdr_hyper(tl); tl += 2; 3440 len = fxdr_hyper(tl); tl += 2; 3441 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3442 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3443 if (minorvers == NFSV4_MINORVERSION) 3444 error = NFSERR_NOTSUPP; 3445 else if (i == 0) 3446 error = NFSERR_OPNOTINSESS; 3447 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n", 3448 (uintmax_t)off, (uintmax_t)len, 3449 stateid.seqid, error); 3450 if (error == 0) { 3451 NFSLOCKCLSTATE(); 3452 clp = nfscl_getclntsess(sessionid); 3453 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3454 if (clp != NULL) { 3455 lyp = nfscl_findlayout(clp, 3456 nfhp->nfh_fh, 3457 nfhp->nfh_len); 3458 NFSCL_DEBUG(4, "cblyp=%p\n", 3459 lyp); 3460 if (lyp != NULL && 3461 (lyp->nfsly_flags & 3462 (NFSLY_FILES | 3463 NFSLY_FLEXFILE)) != 0 && 3464 !NFSBCMP(stateid.other, 3465 lyp->nfsly_stateid.other, 3466 NFSX_STATEIDOTHER)) { 3467 error = 3468 nfscl_layoutrecall( 3469 recalltype, 3470 lyp, iomode, off, 3471 len, stateid.seqid, 3472 recallp); 3473 recallp = NULL; 3474 wakeup(clp); 3475 NFSCL_DEBUG(4, 3476 "aft layrcal=%d\n", 3477 error); 3478 } else 3479 error = 3480 NFSERR_NOMATCHLAYOUT; 3481 } else 3482 error = NFSERR_NOMATCHLAYOUT; 3483 NFSUNLOCKCLSTATE(); 3484 } 3485 free(nfhp, M_NFSFH); 3486 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3487 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3488 filesid[0] = fxdr_hyper(tl); tl += 2; 3489 filesid[1] = fxdr_hyper(tl); tl += 2; 3490 gotone = 0; 3491 NFSLOCKCLSTATE(); 3492 clp = nfscl_getclntsess(sessionid); 3493 if (clp != NULL) { 3494 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3495 nfsly_list) { 3496 if (lyp->nfsly_filesid[0] == 3497 filesid[0] && 3498 lyp->nfsly_filesid[1] == 3499 filesid[1]) { 3500 error = 3501 nfscl_layoutrecall( 3502 recalltype, 3503 lyp, iomode, 0, 3504 UINT64_MAX, 3505 lyp->nfsly_stateid.seqid, 3506 recallp); 3507 recallp = NULL; 3508 gotone = 1; 3509 } 3510 } 3511 if (gotone != 0) 3512 wakeup(clp); 3513 else 3514 error = NFSERR_NOMATCHLAYOUT; 3515 } else 3516 error = NFSERR_NOMATCHLAYOUT; 3517 NFSUNLOCKCLSTATE(); 3518 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3519 gotone = 0; 3520 NFSLOCKCLSTATE(); 3521 clp = nfscl_getclntsess(sessionid); 3522 if (clp != NULL) { 3523 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3524 nfsly_list) { 3525 error = nfscl_layoutrecall( 3526 recalltype, lyp, iomode, 0, 3527 UINT64_MAX, 3528 lyp->nfsly_stateid.seqid, 3529 recallp); 3530 recallp = NULL; 3531 gotone = 1; 3532 } 3533 if (gotone != 0) 3534 wakeup(clp); 3535 else 3536 error = NFSERR_NOMATCHLAYOUT; 3537 } else 3538 error = NFSERR_NOMATCHLAYOUT; 3539 NFSUNLOCKCLSTATE(); 3540 } else 3541 error = NFSERR_NOMATCHLAYOUT; 3542 if (recallp != NULL) { 3543 free(recallp, M_NFSLAYRECALL); 3544 recallp = NULL; 3545 } 3546 break; 3547 case NFSV4OP_CBSEQUENCE: 3548 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3549 5 * NFSX_UNSIGNED); 3550 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3551 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3552 seqid = fxdr_unsigned(uint32_t, *tl++); 3553 slotid = fxdr_unsigned(uint32_t, *tl++); 3554 highslot = fxdr_unsigned(uint32_t, *tl++); 3555 cachethis = *tl++; 3556 /* Throw away the referring call stuff. */ 3557 clist = fxdr_unsigned(int, *tl); 3558 for (j = 0; j < clist; j++) { 3559 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3560 NFSX_UNSIGNED); 3561 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3562 rcalls = fxdr_unsigned(int, *tl); 3563 for (k = 0; k < rcalls; k++) { 3564 NFSM_DISSECT(tl, uint32_t *, 3565 2 * NFSX_UNSIGNED); 3566 } 3567 } 3568 NFSLOCKCLSTATE(); 3569 if (i == 0) { 3570 clp = nfscl_getclntsess(sessionid); 3571 if (clp == NULL) 3572 error = NFSERR_SERVERFAULT; 3573 } else 3574 error = NFSERR_SEQUENCEPOS; 3575 if (error == 0) { 3576 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3577 error = nfsv4_seqsession(seqid, slotid, 3578 highslot, tsep->nfsess_cbslots, &rep, 3579 tsep->nfsess_backslots); 3580 } 3581 NFSUNLOCKCLSTATE(); 3582 if (error == 0 || error == NFSERR_REPLYFROMCACHE) { 3583 gotseq_ok = 1; 3584 if (rep != NULL) { 3585 /* 3586 * Handle a reply for a retried 3587 * callback. The reply will be 3588 * re-inserted in the session cache 3589 * by the nfsv4_seqsess_cacherep() call 3590 * after out: 3591 */ 3592 KASSERT(error == NFSERR_REPLYFROMCACHE, 3593 ("cbsequence: non-NULL rep")); 3594 NFSCL_DEBUG(4, "Got cbretry\n"); 3595 m_freem(nd->nd_mreq); 3596 nd->nd_mreq = rep; 3597 rep = NULL; 3598 goto out; 3599 } 3600 NFSM_BUILD(tl, uint32_t *, 3601 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3602 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3603 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3604 *tl++ = txdr_unsigned(seqid); 3605 *tl++ = txdr_unsigned(slotid); 3606 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3607 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3608 } 3609 break; 3610 default: 3611 if (i == 0 && minorvers == NFSV41_MINORVERSION) 3612 error = NFSERR_OPNOTINSESS; 3613 else { 3614 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3615 error = NFSERR_NOTSUPP; 3616 } 3617 break; 3618 } 3619 if (error) { 3620 if (error == EBADRPC || error == NFSERR_BADXDR) { 3621 nd->nd_repstat = NFSERR_BADXDR; 3622 } else { 3623 nd->nd_repstat = error; 3624 } 3625 error = 0; 3626 } 3627 retops++; 3628 if (nd->nd_repstat) { 3629 *repp = nfscl_errmap(nd, minorvers); 3630 break; 3631 } else 3632 *repp = 0; /* NFS4_OK */ 3633 } 3634 nfsmout: 3635 if (recallp != NULL) 3636 free(recallp, M_NFSLAYRECALL); 3637 if (error) { 3638 if (error == EBADRPC || error == NFSERR_BADXDR) 3639 nd->nd_repstat = NFSERR_BADXDR; 3640 else 3641 printf("nfsv4 comperr1=%d\n", error); 3642 } 3643 if (taglen == -1) { 3644 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3645 *tl++ = 0; 3646 *tl = 0; 3647 } else { 3648 *retopsp = txdr_unsigned(retops); 3649 } 3650 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3651 out: 3652 if (gotseq_ok != 0) { 3653 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3654 NFSLOCKCLSTATE(); 3655 clp = nfscl_getclntsess(sessionid); 3656 if (clp != NULL) { 3657 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3658 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3659 NFSERR_OK, &rep); 3660 NFSUNLOCKCLSTATE(); 3661 } else { 3662 NFSUNLOCKCLSTATE(); 3663 m_freem(rep); 3664 } 3665 } 3666 } 3667 3668 /* 3669 * Generate the next cbident value. Basically just increment a static value 3670 * and then check that it isn't already in the list, if it has wrapped around. 3671 */ 3672 static u_int32_t 3673 nfscl_nextcbident(void) 3674 { 3675 struct nfsclclient *clp; 3676 int matched; 3677 static u_int32_t nextcbident = 0; 3678 static int haswrapped = 0; 3679 3680 nextcbident++; 3681 if (nextcbident == 0) 3682 haswrapped = 1; 3683 if (haswrapped) { 3684 /* 3685 * Search the clientid list for one already using this cbident. 3686 */ 3687 do { 3688 matched = 0; 3689 NFSLOCKCLSTATE(); 3690 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3691 if (clp->nfsc_cbident == nextcbident) { 3692 matched = 1; 3693 break; 3694 } 3695 } 3696 NFSUNLOCKCLSTATE(); 3697 if (matched == 1) 3698 nextcbident++; 3699 } while (matched); 3700 } 3701 return (nextcbident); 3702 } 3703 3704 /* 3705 * Get the mount point related to a given cbident or session and busy it. 3706 */ 3707 static mount_t 3708 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3709 struct nfsclclient **clpp) 3710 { 3711 struct nfsclclient *clp; 3712 mount_t mp; 3713 int error; 3714 struct nfsclsession *tsep; 3715 3716 *clpp = NULL; 3717 NFSLOCKCLSTATE(); 3718 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3719 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3720 if (minorvers == NFSV4_MINORVERSION) { 3721 if (clp->nfsc_cbident == cbident) 3722 break; 3723 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3724 NFSX_V4SESSIONID)) 3725 break; 3726 } 3727 if (clp == NULL) { 3728 NFSUNLOCKCLSTATE(); 3729 return (NULL); 3730 } 3731 mp = clp->nfsc_nmp->nm_mountp; 3732 vfs_ref(mp); 3733 NFSUNLOCKCLSTATE(); 3734 error = vfs_busy(mp, 0); 3735 vfs_rel(mp); 3736 if (error != 0) 3737 return (NULL); 3738 *clpp = clp; 3739 return (mp); 3740 } 3741 3742 /* 3743 * Get the clientid pointer related to a given cbident. 3744 */ 3745 static struct nfsclclient * 3746 nfscl_getclnt(u_int32_t cbident) 3747 { 3748 struct nfsclclient *clp; 3749 3750 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3751 if (clp->nfsc_cbident == cbident) 3752 break; 3753 return (clp); 3754 } 3755 3756 /* 3757 * Get the clientid pointer related to a given sessionid. 3758 */ 3759 static struct nfsclclient * 3760 nfscl_getclntsess(uint8_t *sessionid) 3761 { 3762 struct nfsclclient *clp; 3763 struct nfsclsession *tsep; 3764 3765 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3766 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3767 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3768 NFSX_V4SESSIONID)) 3769 break; 3770 } 3771 return (clp); 3772 } 3773 3774 /* 3775 * Search for a lock conflict locally on the client. A conflict occurs if 3776 * - not same owner and overlapping byte range and at least one of them is 3777 * a write lock or this is an unlock. 3778 */ 3779 static int 3780 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3781 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3782 struct nfscllock **lopp) 3783 { 3784 struct nfsclowner *owp; 3785 struct nfsclopen *op; 3786 int ret; 3787 3788 if (dp != NULL) { 3789 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3790 if (ret) 3791 return (ret); 3792 } 3793 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3794 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3795 if (op->nfso_fhlen == fhlen && 3796 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3797 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3798 own, lopp); 3799 if (ret) 3800 return (ret); 3801 } 3802 } 3803 } 3804 return (0); 3805 } 3806 3807 static int 3808 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3809 u_int8_t *own, struct nfscllock **lopp) 3810 { 3811 struct nfscllockowner *lp; 3812 struct nfscllock *lop; 3813 3814 LIST_FOREACH(lp, lhp, nfsl_list) { 3815 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3816 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3817 if (lop->nfslo_first >= nlop->nfslo_end) 3818 break; 3819 if (lop->nfslo_end <= nlop->nfslo_first) 3820 continue; 3821 if (lop->nfslo_type == F_WRLCK || 3822 nlop->nfslo_type == F_WRLCK || 3823 nlop->nfslo_type == F_UNLCK) { 3824 if (lopp != NULL) 3825 *lopp = lop; 3826 return (NFSERR_DENIED); 3827 } 3828 } 3829 } 3830 } 3831 return (0); 3832 } 3833 3834 /* 3835 * Check for a local conflicting lock. 3836 */ 3837 APPLESTATIC int 3838 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3839 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3840 { 3841 struct nfscllock *lop, nlck; 3842 struct nfscldeleg *dp; 3843 struct nfsnode *np; 3844 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3845 int error; 3846 3847 nlck.nfslo_type = fl->l_type; 3848 nlck.nfslo_first = off; 3849 if (len == NFS64BITSSET) { 3850 nlck.nfslo_end = NFS64BITSSET; 3851 } else { 3852 nlck.nfslo_end = off + len; 3853 if (nlck.nfslo_end <= nlck.nfslo_first) 3854 return (NFSERR_INVAL); 3855 } 3856 np = VTONFS(vp); 3857 nfscl_filllockowner(id, own, flags); 3858 NFSLOCKCLSTATE(); 3859 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3860 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3861 &nlck, own, dp, &lop); 3862 if (error != 0) { 3863 fl->l_whence = SEEK_SET; 3864 fl->l_start = lop->nfslo_first; 3865 if (lop->nfslo_end == NFS64BITSSET) 3866 fl->l_len = 0; 3867 else 3868 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3869 fl->l_pid = (pid_t)0; 3870 fl->l_type = lop->nfslo_type; 3871 error = -1; /* no RPC required */ 3872 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3873 fl->l_type == F_RDLCK)) { 3874 /* 3875 * The delegation ensures that there isn't a conflicting 3876 * lock on the server, so return -1 to indicate an RPC 3877 * isn't required. 3878 */ 3879 fl->l_type = F_UNLCK; 3880 error = -1; 3881 } 3882 NFSUNLOCKCLSTATE(); 3883 return (error); 3884 } 3885 3886 /* 3887 * Handle Recall of a delegation. 3888 * The clp must be exclusive locked when this is called. 3889 */ 3890 static int 3891 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3892 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3893 int called_from_renewthread) 3894 { 3895 struct nfsclowner *owp, *lowp, *nowp; 3896 struct nfsclopen *op, *lop; 3897 struct nfscllockowner *lp; 3898 struct nfscllock *lckp; 3899 struct nfsnode *np; 3900 int error = 0, ret, gotvp = 0; 3901 3902 if (vp == NULL) { 3903 /* 3904 * First, get a vnode for the file. This is needed to do RPCs. 3905 */ 3906 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3907 dp->nfsdl_fhlen, p, &np); 3908 if (ret) { 3909 /* 3910 * File isn't open, so nothing to move over to the 3911 * server. 3912 */ 3913 return (0); 3914 } 3915 vp = NFSTOV(np); 3916 gotvp = 1; 3917 } else { 3918 np = VTONFS(vp); 3919 } 3920 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3921 3922 /* 3923 * Ok, if it's a write delegation, flush data to the server, so 3924 * that close/open consistency is retained. 3925 */ 3926 ret = 0; 3927 NFSLOCKNODE(np); 3928 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3929 np->n_flag |= NDELEGRECALL; 3930 NFSUNLOCKNODE(np); 3931 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread); 3932 NFSLOCKNODE(np); 3933 np->n_flag &= ~NDELEGRECALL; 3934 } 3935 NFSINVALATTRCACHE(np); 3936 NFSUNLOCKNODE(np); 3937 if (ret == EIO && called_from_renewthread != 0) { 3938 /* 3939 * If the flush failed with EIO for the renew thread, 3940 * return now, so that the dirty buffer will be flushed 3941 * later. 3942 */ 3943 if (gotvp != 0) 3944 vrele(vp); 3945 return (ret); 3946 } 3947 3948 /* 3949 * Now, for each openowner with opens issued locally, move them 3950 * over to state against the server. 3951 */ 3952 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3953 lop = LIST_FIRST(&lowp->nfsow_open); 3954 if (lop != NULL) { 3955 if (LIST_NEXT(lop, nfso_list) != NULL) 3956 panic("nfsdlg mult opens"); 3957 /* 3958 * Look for the same openowner against the server. 3959 */ 3960 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3961 if (!NFSBCMP(lowp->nfsow_owner, 3962 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3963 newnfs_copycred(&dp->nfsdl_cred, cred); 3964 ret = nfscl_moveopen(vp, clp, nmp, lop, 3965 owp, dp, cred, p); 3966 if (ret == NFSERR_STALECLIENTID || 3967 ret == NFSERR_STALEDONTRECOVER || 3968 ret == NFSERR_BADSESSION) { 3969 if (gotvp) 3970 vrele(vp); 3971 return (ret); 3972 } 3973 if (ret) { 3974 nfscl_freeopen(lop, 1); 3975 if (!error) 3976 error = ret; 3977 } 3978 break; 3979 } 3980 } 3981 3982 /* 3983 * If no openowner found, create one and get an open 3984 * for it. 3985 */ 3986 if (owp == NULL) { 3987 nowp = malloc( 3988 sizeof (struct nfsclowner), M_NFSCLOWNER, 3989 M_WAITOK); 3990 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3991 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3992 dp->nfsdl_fhlen, NULL, NULL); 3993 newnfs_copycred(&dp->nfsdl_cred, cred); 3994 ret = nfscl_moveopen(vp, clp, nmp, lop, 3995 owp, dp, cred, p); 3996 if (ret) { 3997 nfscl_freeopenowner(owp, 0); 3998 if (ret == NFSERR_STALECLIENTID || 3999 ret == NFSERR_STALEDONTRECOVER || 4000 ret == NFSERR_BADSESSION) { 4001 if (gotvp) 4002 vrele(vp); 4003 return (ret); 4004 } 4005 if (ret) { 4006 nfscl_freeopen(lop, 1); 4007 if (!error) 4008 error = ret; 4009 } 4010 } 4011 } 4012 } 4013 } 4014 4015 /* 4016 * Now, get byte range locks for any locks done locally. 4017 */ 4018 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4019 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 4020 newnfs_copycred(&dp->nfsdl_cred, cred); 4021 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 4022 if (ret == NFSERR_STALESTATEID || 4023 ret == NFSERR_STALEDONTRECOVER || 4024 ret == NFSERR_STALECLIENTID || 4025 ret == NFSERR_BADSESSION) { 4026 if (gotvp) 4027 vrele(vp); 4028 return (ret); 4029 } 4030 if (ret && !error) 4031 error = ret; 4032 } 4033 } 4034 if (gotvp) 4035 vrele(vp); 4036 return (error); 4037 } 4038 4039 /* 4040 * Move a locally issued open over to an owner on the state list. 4041 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 4042 * returns with it unlocked. 4043 */ 4044 static int 4045 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4046 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 4047 struct ucred *cred, NFSPROC_T *p) 4048 { 4049 struct nfsclopen *op, *nop; 4050 struct nfscldeleg *ndp; 4051 struct nfsnode *np; 4052 int error = 0, newone; 4053 4054 /* 4055 * First, look for an appropriate open, If found, just increment the 4056 * opencnt in it. 4057 */ 4058 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 4059 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 4060 op->nfso_fhlen == lop->nfso_fhlen && 4061 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 4062 op->nfso_opencnt += lop->nfso_opencnt; 4063 nfscl_freeopen(lop, 1); 4064 return (0); 4065 } 4066 } 4067 4068 /* No appropriate open, so we have to do one against the server. */ 4069 np = VTONFS(vp); 4070 nop = malloc(sizeof (struct nfsclopen) + 4071 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 4072 newone = 0; 4073 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 4074 lop->nfso_fh, lop->nfso_fhlen, cred, &newone); 4075 ndp = dp; 4076 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 4077 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 4078 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 4079 if (error) { 4080 if (newone) 4081 nfscl_freeopen(op, 0); 4082 } else { 4083 op->nfso_mode |= lop->nfso_mode; 4084 op->nfso_opencnt += lop->nfso_opencnt; 4085 nfscl_freeopen(lop, 1); 4086 } 4087 if (nop != NULL) 4088 free(nop, M_NFSCLOPEN); 4089 if (ndp != NULL) { 4090 /* 4091 * What should I do with the returned delegation, since the 4092 * delegation is being recalled? For now, just printf and 4093 * through it away. 4094 */ 4095 printf("Moveopen returned deleg\n"); 4096 free(ndp, M_NFSCLDELEG); 4097 } 4098 return (error); 4099 } 4100 4101 /* 4102 * Recall all delegations on this client. 4103 */ 4104 static void 4105 nfscl_totalrecall(struct nfsclclient *clp) 4106 { 4107 struct nfscldeleg *dp; 4108 4109 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4110 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4111 dp->nfsdl_flags |= NFSCLDL_RECALL; 4112 } 4113 } 4114 4115 /* 4116 * Relock byte ranges. Called for delegation recall and state expiry. 4117 */ 4118 static int 4119 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4120 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4121 NFSPROC_T *p) 4122 { 4123 struct nfscllockowner *nlp; 4124 struct nfsfh *nfhp; 4125 u_int64_t off, len; 4126 int error, newone, donelocally; 4127 4128 off = lop->nfslo_first; 4129 len = lop->nfslo_end - lop->nfslo_first; 4130 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4131 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4132 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4133 if (error || donelocally) 4134 return (error); 4135 nfhp = VTONFS(vp)->n_fhp; 4136 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4137 nfhp->nfh_len, nlp, newone, 0, off, 4138 len, lop->nfslo_type, cred, p); 4139 if (error) 4140 nfscl_freelockowner(nlp, 0); 4141 return (error); 4142 } 4143 4144 /* 4145 * Called to re-open a file. Basically get a vnode for the file handle 4146 * and then call nfsrpc_openrpc() to do the rest. 4147 */ 4148 static int 4149 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4150 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4151 struct ucred *cred, NFSPROC_T *p) 4152 { 4153 struct nfsnode *np; 4154 vnode_t vp; 4155 int error; 4156 4157 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4158 if (error) 4159 return (error); 4160 vp = NFSTOV(np); 4161 if (np->n_v4 != NULL) { 4162 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4163 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4164 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4165 cred, p); 4166 } else { 4167 error = EINVAL; 4168 } 4169 vrele(vp); 4170 return (error); 4171 } 4172 4173 /* 4174 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4175 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4176 * fail. 4177 */ 4178 static int 4179 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4180 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4181 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4182 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4183 { 4184 int error; 4185 4186 do { 4187 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4188 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4189 0, 0); 4190 if (error == NFSERR_DELAY) 4191 (void) nfs_catnap(PZERO, error, "nfstryop"); 4192 } while (error == NFSERR_DELAY); 4193 if (error == EAUTH || error == EACCES) { 4194 /* Try again using system credentials */ 4195 newnfs_setroot(cred); 4196 do { 4197 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4198 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4199 delegtype, cred, p, 1, 0); 4200 if (error == NFSERR_DELAY) 4201 (void) nfs_catnap(PZERO, error, "nfstryop"); 4202 } while (error == NFSERR_DELAY); 4203 } 4204 return (error); 4205 } 4206 4207 /* 4208 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4209 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4210 * cred don't work. 4211 */ 4212 static int 4213 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4214 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4215 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4216 { 4217 struct nfsrv_descript nfsd, *nd = &nfsd; 4218 int error; 4219 4220 do { 4221 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4222 reclaim, off, len, type, cred, p, 0); 4223 if (!error && nd->nd_repstat == NFSERR_DELAY) 4224 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4225 "nfstrylck"); 4226 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4227 if (!error) 4228 error = nd->nd_repstat; 4229 if (error == EAUTH || error == EACCES) { 4230 /* Try again using root credentials */ 4231 newnfs_setroot(cred); 4232 do { 4233 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4234 newone, reclaim, off, len, type, cred, p, 1); 4235 if (!error && nd->nd_repstat == NFSERR_DELAY) 4236 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4237 "nfstrylck"); 4238 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4239 if (!error) 4240 error = nd->nd_repstat; 4241 } 4242 return (error); 4243 } 4244 4245 /* 4246 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4247 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4248 * credentials fail. 4249 */ 4250 static int 4251 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4252 struct nfsmount *nmp, NFSPROC_T *p) 4253 { 4254 int error; 4255 4256 do { 4257 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4258 if (error == NFSERR_DELAY) 4259 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4260 } while (error == NFSERR_DELAY); 4261 if (error == EAUTH || error == EACCES) { 4262 /* Try again using system credentials */ 4263 newnfs_setroot(cred); 4264 do { 4265 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4266 if (error == NFSERR_DELAY) 4267 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4268 } while (error == NFSERR_DELAY); 4269 } 4270 return (error); 4271 } 4272 4273 /* 4274 * Try a close against the server. Just call nfsrpc_closerpc(), 4275 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4276 * credentials fail. 4277 */ 4278 APPLESTATIC int 4279 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4280 struct nfsmount *nmp, NFSPROC_T *p) 4281 { 4282 struct nfsrv_descript nfsd, *nd = &nfsd; 4283 int error; 4284 4285 do { 4286 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4287 if (error == NFSERR_DELAY) 4288 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4289 } while (error == NFSERR_DELAY); 4290 if (error == EAUTH || error == EACCES) { 4291 /* Try again using system credentials */ 4292 newnfs_setroot(cred); 4293 do { 4294 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4295 if (error == NFSERR_DELAY) 4296 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4297 } while (error == NFSERR_DELAY); 4298 } 4299 return (error); 4300 } 4301 4302 /* 4303 * Decide if a delegation on a file permits close without flushing writes 4304 * to the server. This might be a big performance win in some environments. 4305 * (Not useful until the client does caching on local stable storage.) 4306 */ 4307 APPLESTATIC int 4308 nfscl_mustflush(vnode_t vp) 4309 { 4310 struct nfsclclient *clp; 4311 struct nfscldeleg *dp; 4312 struct nfsnode *np; 4313 struct nfsmount *nmp; 4314 4315 np = VTONFS(vp); 4316 nmp = VFSTONFS(vnode_mount(vp)); 4317 if (!NFSHASNFSV4(nmp)) 4318 return (1); 4319 NFSLOCKCLSTATE(); 4320 clp = nfscl_findcl(nmp); 4321 if (clp == NULL) { 4322 NFSUNLOCKCLSTATE(); 4323 return (1); 4324 } 4325 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4326 if (dp != NULL && (dp->nfsdl_flags & 4327 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4328 NFSCLDL_WRITE && 4329 (dp->nfsdl_sizelimit >= np->n_size || 4330 !NFSHASSTRICT3530(nmp))) { 4331 NFSUNLOCKCLSTATE(); 4332 return (0); 4333 } 4334 NFSUNLOCKCLSTATE(); 4335 return (1); 4336 } 4337 4338 /* 4339 * See if a (write) delegation exists for this file. 4340 */ 4341 APPLESTATIC int 4342 nfscl_nodeleg(vnode_t vp, int writedeleg) 4343 { 4344 struct nfsclclient *clp; 4345 struct nfscldeleg *dp; 4346 struct nfsnode *np; 4347 struct nfsmount *nmp; 4348 4349 np = VTONFS(vp); 4350 nmp = VFSTONFS(vnode_mount(vp)); 4351 if (!NFSHASNFSV4(nmp)) 4352 return (1); 4353 NFSLOCKCLSTATE(); 4354 clp = nfscl_findcl(nmp); 4355 if (clp == NULL) { 4356 NFSUNLOCKCLSTATE(); 4357 return (1); 4358 } 4359 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4360 if (dp != NULL && 4361 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4362 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4363 NFSCLDL_WRITE)) { 4364 NFSUNLOCKCLSTATE(); 4365 return (0); 4366 } 4367 NFSUNLOCKCLSTATE(); 4368 return (1); 4369 } 4370 4371 /* 4372 * Look for an associated delegation that should be DelegReturned. 4373 */ 4374 APPLESTATIC int 4375 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4376 { 4377 struct nfsclclient *clp; 4378 struct nfscldeleg *dp; 4379 struct nfsclowner *owp; 4380 struct nfscllockowner *lp; 4381 struct nfsmount *nmp; 4382 struct ucred *cred; 4383 struct nfsnode *np; 4384 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4385 4386 nmp = VFSTONFS(vnode_mount(vp)); 4387 np = VTONFS(vp); 4388 NFSLOCKCLSTATE(); 4389 /* 4390 * Loop around waiting for: 4391 * - outstanding I/O operations on delegations to complete 4392 * - for a delegation on vp that has state, lock the client and 4393 * do a recall 4394 * - return delegation with no state 4395 */ 4396 while (1) { 4397 clp = nfscl_findcl(nmp); 4398 if (clp == NULL) { 4399 NFSUNLOCKCLSTATE(); 4400 return (retcnt); 4401 } 4402 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4403 np->n_fhp->nfh_len); 4404 if (dp != NULL) { 4405 /* 4406 * Wait for outstanding I/O ops to be done. 4407 */ 4408 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4409 if (igotlock) { 4410 nfsv4_unlock(&clp->nfsc_lock, 0); 4411 igotlock = 0; 4412 } 4413 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4414 (void) nfsmsleep(&dp->nfsdl_rwlock, 4415 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4416 continue; 4417 } 4418 needsrecall = 0; 4419 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4420 if (!LIST_EMPTY(&owp->nfsow_open)) { 4421 needsrecall = 1; 4422 break; 4423 } 4424 } 4425 if (!needsrecall) { 4426 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4427 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4428 needsrecall = 1; 4429 break; 4430 } 4431 } 4432 } 4433 if (needsrecall && !triedrecall) { 4434 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4435 islept = 0; 4436 while (!igotlock) { 4437 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4438 &islept, NFSCLSTATEMUTEXPTR, NULL); 4439 if (islept) 4440 break; 4441 } 4442 if (islept) 4443 continue; 4444 NFSUNLOCKCLSTATE(); 4445 cred = newnfs_getcred(); 4446 newnfs_copycred(&dp->nfsdl_cred, cred); 4447 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 4448 NFSFREECRED(cred); 4449 triedrecall = 1; 4450 NFSLOCKCLSTATE(); 4451 nfsv4_unlock(&clp->nfsc_lock, 0); 4452 igotlock = 0; 4453 continue; 4454 } 4455 *stp = dp->nfsdl_stateid; 4456 retcnt = 1; 4457 nfscl_cleandeleg(dp); 4458 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4459 } 4460 if (igotlock) 4461 nfsv4_unlock(&clp->nfsc_lock, 0); 4462 NFSUNLOCKCLSTATE(); 4463 return (retcnt); 4464 } 4465 } 4466 4467 /* 4468 * Look for associated delegation(s) that should be DelegReturned. 4469 */ 4470 APPLESTATIC int 4471 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4472 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4473 { 4474 struct nfsclclient *clp; 4475 struct nfscldeleg *dp; 4476 struct nfsclowner *owp; 4477 struct nfscllockowner *lp; 4478 struct nfsmount *nmp; 4479 struct ucred *cred; 4480 struct nfsnode *np; 4481 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4482 4483 nmp = VFSTONFS(vnode_mount(fvp)); 4484 *gotfdp = 0; 4485 *gottdp = 0; 4486 NFSLOCKCLSTATE(); 4487 /* 4488 * Loop around waiting for: 4489 * - outstanding I/O operations on delegations to complete 4490 * - for a delegation on fvp that has state, lock the client and 4491 * do a recall 4492 * - return delegation(s) with no state. 4493 */ 4494 while (1) { 4495 clp = nfscl_findcl(nmp); 4496 if (clp == NULL) { 4497 NFSUNLOCKCLSTATE(); 4498 return (retcnt); 4499 } 4500 np = VTONFS(fvp); 4501 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4502 np->n_fhp->nfh_len); 4503 if (dp != NULL && *gotfdp == 0) { 4504 /* 4505 * Wait for outstanding I/O ops to be done. 4506 */ 4507 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4508 if (igotlock) { 4509 nfsv4_unlock(&clp->nfsc_lock, 0); 4510 igotlock = 0; 4511 } 4512 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4513 (void) nfsmsleep(&dp->nfsdl_rwlock, 4514 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4515 continue; 4516 } 4517 needsrecall = 0; 4518 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4519 if (!LIST_EMPTY(&owp->nfsow_open)) { 4520 needsrecall = 1; 4521 break; 4522 } 4523 } 4524 if (!needsrecall) { 4525 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4526 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4527 needsrecall = 1; 4528 break; 4529 } 4530 } 4531 } 4532 if (needsrecall && !triedrecall) { 4533 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4534 islept = 0; 4535 while (!igotlock) { 4536 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4537 &islept, NFSCLSTATEMUTEXPTR, NULL); 4538 if (islept) 4539 break; 4540 } 4541 if (islept) 4542 continue; 4543 NFSUNLOCKCLSTATE(); 4544 cred = newnfs_getcred(); 4545 newnfs_copycred(&dp->nfsdl_cred, cred); 4546 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4547 NFSFREECRED(cred); 4548 triedrecall = 1; 4549 NFSLOCKCLSTATE(); 4550 nfsv4_unlock(&clp->nfsc_lock, 0); 4551 igotlock = 0; 4552 continue; 4553 } 4554 *fstp = dp->nfsdl_stateid; 4555 retcnt++; 4556 *gotfdp = 1; 4557 nfscl_cleandeleg(dp); 4558 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4559 } 4560 if (igotlock) { 4561 nfsv4_unlock(&clp->nfsc_lock, 0); 4562 igotlock = 0; 4563 } 4564 if (tvp != NULL) { 4565 np = VTONFS(tvp); 4566 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4567 np->n_fhp->nfh_len); 4568 if (dp != NULL && *gottdp == 0) { 4569 /* 4570 * Wait for outstanding I/O ops to be done. 4571 */ 4572 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4573 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4574 (void) nfsmsleep(&dp->nfsdl_rwlock, 4575 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4576 continue; 4577 } 4578 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4579 if (!LIST_EMPTY(&owp->nfsow_open)) { 4580 NFSUNLOCKCLSTATE(); 4581 return (retcnt); 4582 } 4583 } 4584 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4585 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4586 NFSUNLOCKCLSTATE(); 4587 return (retcnt); 4588 } 4589 } 4590 *tstp = dp->nfsdl_stateid; 4591 retcnt++; 4592 *gottdp = 1; 4593 nfscl_cleandeleg(dp); 4594 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4595 } 4596 } 4597 NFSUNLOCKCLSTATE(); 4598 return (retcnt); 4599 } 4600 } 4601 4602 /* 4603 * Get a reference on the clientid associated with the mount point. 4604 * Return 1 if success, 0 otherwise. 4605 */ 4606 APPLESTATIC int 4607 nfscl_getref(struct nfsmount *nmp) 4608 { 4609 struct nfsclclient *clp; 4610 4611 NFSLOCKCLSTATE(); 4612 clp = nfscl_findcl(nmp); 4613 if (clp == NULL) { 4614 NFSUNLOCKCLSTATE(); 4615 return (0); 4616 } 4617 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4618 NFSUNLOCKCLSTATE(); 4619 return (1); 4620 } 4621 4622 /* 4623 * Release a reference on a clientid acquired with the above call. 4624 */ 4625 APPLESTATIC void 4626 nfscl_relref(struct nfsmount *nmp) 4627 { 4628 struct nfsclclient *clp; 4629 4630 NFSLOCKCLSTATE(); 4631 clp = nfscl_findcl(nmp); 4632 if (clp == NULL) { 4633 NFSUNLOCKCLSTATE(); 4634 return; 4635 } 4636 nfsv4_relref(&clp->nfsc_lock); 4637 NFSUNLOCKCLSTATE(); 4638 } 4639 4640 /* 4641 * Save the size attribute in the delegation, since the nfsnode 4642 * is going away. 4643 */ 4644 APPLESTATIC void 4645 nfscl_reclaimnode(vnode_t vp) 4646 { 4647 struct nfsclclient *clp; 4648 struct nfscldeleg *dp; 4649 struct nfsnode *np = VTONFS(vp); 4650 struct nfsmount *nmp; 4651 4652 nmp = VFSTONFS(vnode_mount(vp)); 4653 if (!NFSHASNFSV4(nmp)) 4654 return; 4655 NFSLOCKCLSTATE(); 4656 clp = nfscl_findcl(nmp); 4657 if (clp == NULL) { 4658 NFSUNLOCKCLSTATE(); 4659 return; 4660 } 4661 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4662 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4663 dp->nfsdl_size = np->n_size; 4664 NFSUNLOCKCLSTATE(); 4665 } 4666 4667 /* 4668 * Get the saved size attribute in the delegation, since it is a 4669 * newly allocated nfsnode. 4670 */ 4671 APPLESTATIC void 4672 nfscl_newnode(vnode_t vp) 4673 { 4674 struct nfsclclient *clp; 4675 struct nfscldeleg *dp; 4676 struct nfsnode *np = VTONFS(vp); 4677 struct nfsmount *nmp; 4678 4679 nmp = VFSTONFS(vnode_mount(vp)); 4680 if (!NFSHASNFSV4(nmp)) 4681 return; 4682 NFSLOCKCLSTATE(); 4683 clp = nfscl_findcl(nmp); 4684 if (clp == NULL) { 4685 NFSUNLOCKCLSTATE(); 4686 return; 4687 } 4688 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4689 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4690 np->n_size = dp->nfsdl_size; 4691 NFSUNLOCKCLSTATE(); 4692 } 4693 4694 /* 4695 * If there is a valid write delegation for this file, set the modtime 4696 * to the local clock time. 4697 */ 4698 APPLESTATIC void 4699 nfscl_delegmodtime(vnode_t vp) 4700 { 4701 struct nfsclclient *clp; 4702 struct nfscldeleg *dp; 4703 struct nfsnode *np = VTONFS(vp); 4704 struct nfsmount *nmp; 4705 4706 nmp = VFSTONFS(vnode_mount(vp)); 4707 if (!NFSHASNFSV4(nmp)) 4708 return; 4709 NFSLOCKCLSTATE(); 4710 clp = nfscl_findcl(nmp); 4711 if (clp == NULL) { 4712 NFSUNLOCKCLSTATE(); 4713 return; 4714 } 4715 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4716 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4717 nanotime(&dp->nfsdl_modtime); 4718 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4719 } 4720 NFSUNLOCKCLSTATE(); 4721 } 4722 4723 /* 4724 * If there is a valid write delegation for this file with a modtime set, 4725 * put that modtime in mtime. 4726 */ 4727 APPLESTATIC void 4728 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4729 { 4730 struct nfsclclient *clp; 4731 struct nfscldeleg *dp; 4732 struct nfsnode *np = VTONFS(vp); 4733 struct nfsmount *nmp; 4734 4735 nmp = VFSTONFS(vnode_mount(vp)); 4736 if (!NFSHASNFSV4(nmp)) 4737 return; 4738 NFSLOCKCLSTATE(); 4739 clp = nfscl_findcl(nmp); 4740 if (clp == NULL) { 4741 NFSUNLOCKCLSTATE(); 4742 return; 4743 } 4744 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4745 if (dp != NULL && 4746 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4747 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4748 *mtime = dp->nfsdl_modtime; 4749 NFSUNLOCKCLSTATE(); 4750 } 4751 4752 static int 4753 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4754 { 4755 short *defaulterrp, *errp; 4756 4757 if (!nd->nd_repstat) 4758 return (0); 4759 if (nd->nd_procnum == NFSPROC_NOOP) 4760 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4761 if (nd->nd_repstat == EBADRPC) 4762 return (txdr_unsigned(NFSERR_BADXDR)); 4763 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4764 nd->nd_repstat == NFSERR_OPILLEGAL) 4765 return (txdr_unsigned(nd->nd_repstat)); 4766 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4767 minorvers > NFSV4_MINORVERSION) { 4768 /* NFSv4.n error. */ 4769 return (txdr_unsigned(nd->nd_repstat)); 4770 } 4771 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4772 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4773 else 4774 return (txdr_unsigned(nd->nd_repstat)); 4775 while (*++errp) 4776 if (*errp == (short)nd->nd_repstat) 4777 return (txdr_unsigned(nd->nd_repstat)); 4778 return (txdr_unsigned(*defaulterrp)); 4779 } 4780 4781 /* 4782 * Called to find/add a layout to a client. 4783 * This function returns the layout with a refcnt (shared lock) upon 4784 * success (returns 0) or with no lock/refcnt on the layout when an 4785 * error is returned. 4786 * If a layout is passed in via lypp, it is locked (exclusively locked). 4787 */ 4788 APPLESTATIC int 4789 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4790 nfsv4stateid_t *stateidp, int layouttype, int retonclose, 4791 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4792 struct ucred *cred, NFSPROC_T *p) 4793 { 4794 struct nfsclclient *clp; 4795 struct nfscllayout *lyp, *tlyp; 4796 struct nfsclflayout *flp; 4797 struct nfsnode *np = VTONFS(vp); 4798 mount_t mp; 4799 int layout_passed_in; 4800 4801 mp = nmp->nm_mountp; 4802 layout_passed_in = 1; 4803 tlyp = NULL; 4804 lyp = *lypp; 4805 if (lyp == NULL) { 4806 layout_passed_in = 0; 4807 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4808 M_WAITOK | M_ZERO); 4809 } 4810 4811 NFSLOCKCLSTATE(); 4812 clp = nmp->nm_clp; 4813 if (clp == NULL) { 4814 if (layout_passed_in != 0) 4815 nfsv4_unlock(&lyp->nfsly_lock, 0); 4816 NFSUNLOCKCLSTATE(); 4817 if (tlyp != NULL) 4818 free(tlyp, M_NFSLAYOUT); 4819 return (EPERM); 4820 } 4821 if (lyp == NULL) { 4822 /* 4823 * Although no lyp was passed in, another thread might have 4824 * allocated one. If one is found, just increment it's ref 4825 * count and return it. 4826 */ 4827 lyp = nfscl_findlayout(clp, fhp, fhlen); 4828 if (lyp == NULL) { 4829 lyp = tlyp; 4830 tlyp = NULL; 4831 lyp->nfsly_stateid.seqid = stateidp->seqid; 4832 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 4833 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 4834 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 4835 lyp->nfsly_lastbyte = 0; 4836 LIST_INIT(&lyp->nfsly_flayread); 4837 LIST_INIT(&lyp->nfsly_flayrw); 4838 LIST_INIT(&lyp->nfsly_recall); 4839 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 4840 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 4841 lyp->nfsly_clp = clp; 4842 if (layouttype == NFSLAYOUT_FLEXFILE) 4843 lyp->nfsly_flags = NFSLY_FLEXFILE; 4844 else 4845 lyp->nfsly_flags = NFSLY_FILES; 4846 if (retonclose != 0) 4847 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4848 lyp->nfsly_fhlen = fhlen; 4849 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 4850 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4851 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 4852 nfsly_hash); 4853 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4854 nfscl_layoutcnt++; 4855 } else { 4856 if (retonclose != 0) 4857 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4858 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4859 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4860 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4861 } 4862 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 4863 if (NFSCL_FORCEDISM(mp)) { 4864 NFSUNLOCKCLSTATE(); 4865 if (tlyp != NULL) 4866 free(tlyp, M_NFSLAYOUT); 4867 return (EPERM); 4868 } 4869 *lypp = lyp; 4870 } else 4871 lyp->nfsly_stateid.seqid = stateidp->seqid; 4872 4873 /* Merge the new list of File Layouts into the list. */ 4874 flp = LIST_FIRST(fhlp); 4875 if (flp != NULL) { 4876 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 4877 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 4878 else 4879 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 4880 } 4881 if (layout_passed_in != 0) 4882 nfsv4_unlock(&lyp->nfsly_lock, 1); 4883 NFSUNLOCKCLSTATE(); 4884 if (tlyp != NULL) 4885 free(tlyp, M_NFSLAYOUT); 4886 return (0); 4887 } 4888 4889 /* 4890 * Search for a layout by MDS file handle. 4891 * If one is found, it is returned with a refcnt (shared lock) iff 4892 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 4893 * returned NULL. 4894 */ 4895 struct nfscllayout * 4896 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 4897 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 4898 { 4899 struct nfscllayout *lyp; 4900 mount_t mp; 4901 int error, igotlock; 4902 4903 mp = clp->nfsc_nmp->nm_mountp; 4904 *recalledp = 0; 4905 *retflpp = NULL; 4906 NFSLOCKCLSTATE(); 4907 lyp = nfscl_findlayout(clp, fhp, fhlen); 4908 if (lyp != NULL) { 4909 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4910 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4911 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4912 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4913 error = nfscl_findlayoutforio(lyp, off, 4914 NFSV4OPEN_ACCESSREAD, retflpp); 4915 if (error == 0) 4916 nfsv4_getref(&lyp->nfsly_lock, NULL, 4917 NFSCLSTATEMUTEXPTR, mp); 4918 else { 4919 do { 4920 igotlock = nfsv4_lock(&lyp->nfsly_lock, 4921 1, NULL, NFSCLSTATEMUTEXPTR, mp); 4922 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp)); 4923 *retflpp = NULL; 4924 } 4925 if (NFSCL_FORCEDISM(mp)) { 4926 lyp = NULL; 4927 *recalledp = 1; 4928 } 4929 } else { 4930 lyp = NULL; 4931 *recalledp = 1; 4932 } 4933 } 4934 NFSUNLOCKCLSTATE(); 4935 return (lyp); 4936 } 4937 4938 /* 4939 * Search for a layout by MDS file handle. If one is found, mark in to be 4940 * recalled, if it already marked "return on close". 4941 */ 4942 static void 4943 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp, 4944 int fhlen, struct nfsclrecalllayout **recallpp) 4945 { 4946 struct nfscllayout *lyp; 4947 uint32_t iomode; 4948 4949 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) || 4950 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 || 4951 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0) 4952 return; 4953 lyp = nfscl_findlayout(clp, fhp, fhlen); 4954 if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE | 4955 NFSLY_RECALL)) == NFSLY_RETONCLOSE) { 4956 iomode = 0; 4957 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 4958 iomode |= NFSLAYOUTIOMODE_READ; 4959 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 4960 iomode |= NFSLAYOUTIOMODE_RW; 4961 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 4962 0, UINT64_MAX, lyp->nfsly_stateid.seqid, *recallpp); 4963 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode); 4964 *recallpp = NULL; 4965 } 4966 } 4967 4968 /* 4969 * Dereference a layout. 4970 */ 4971 void 4972 nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 4973 { 4974 4975 NFSLOCKCLSTATE(); 4976 if (exclocked != 0) 4977 nfsv4_unlock(&lyp->nfsly_lock, 0); 4978 else 4979 nfsv4_relref(&lyp->nfsly_lock); 4980 NFSUNLOCKCLSTATE(); 4981 } 4982 4983 /* 4984 * Search for a devinfo by deviceid. If one is found, return it after 4985 * acquiring a reference count on it. 4986 */ 4987 struct nfscldevinfo * 4988 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 4989 struct nfscldevinfo *dip) 4990 { 4991 4992 NFSLOCKCLSTATE(); 4993 if (dip == NULL) 4994 dip = nfscl_finddevinfo(clp, deviceid); 4995 if (dip != NULL) 4996 dip->nfsdi_refcnt++; 4997 NFSUNLOCKCLSTATE(); 4998 return (dip); 4999 } 5000 5001 /* 5002 * Dereference a devinfo structure. 5003 */ 5004 static void 5005 nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 5006 { 5007 5008 dip->nfsdi_refcnt--; 5009 if (dip->nfsdi_refcnt == 0) 5010 wakeup(&dip->nfsdi_refcnt); 5011 } 5012 5013 /* 5014 * Dereference a devinfo structure. 5015 */ 5016 void 5017 nfscl_reldevinfo(struct nfscldevinfo *dip) 5018 { 5019 5020 NFSLOCKCLSTATE(); 5021 nfscl_reldevinfo_locked(dip); 5022 NFSUNLOCKCLSTATE(); 5023 } 5024 5025 /* 5026 * Find a layout for this file handle. Return NULL upon failure. 5027 */ 5028 static struct nfscllayout * 5029 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 5030 { 5031 struct nfscllayout *lyp; 5032 5033 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 5034 if (lyp->nfsly_fhlen == fhlen && 5035 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 5036 break; 5037 return (lyp); 5038 } 5039 5040 /* 5041 * Find a devinfo for this deviceid. Return NULL upon failure. 5042 */ 5043 static struct nfscldevinfo * 5044 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 5045 { 5046 struct nfscldevinfo *dip; 5047 5048 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 5049 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 5050 == 0) 5051 break; 5052 return (dip); 5053 } 5054 5055 /* 5056 * Merge the new file layout list into the main one, maintaining it in 5057 * increasing offset order. 5058 */ 5059 static void 5060 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 5061 struct nfsclflayouthead *newfhlp) 5062 { 5063 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 5064 5065 flp = LIST_FIRST(fhlp); 5066 prevflp = NULL; 5067 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 5068 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 5069 prevflp = flp; 5070 flp = LIST_NEXT(flp, nfsfl_list); 5071 } 5072 if (prevflp == NULL) 5073 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 5074 else 5075 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 5076 prevflp = nflp; 5077 } 5078 } 5079 5080 /* 5081 * Add this nfscldevinfo to the client, if it doesn't already exist. 5082 * This function consumes the structure pointed at by dip, if not NULL. 5083 */ 5084 APPLESTATIC int 5085 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, 5086 struct nfsclflayout *flp) 5087 { 5088 struct nfsclclient *clp; 5089 struct nfscldevinfo *tdip; 5090 uint8_t *dev; 5091 5092 NFSLOCKCLSTATE(); 5093 clp = nmp->nm_clp; 5094 if (clp == NULL) { 5095 NFSUNLOCKCLSTATE(); 5096 if (dip != NULL) 5097 free(dip, M_NFSDEVINFO); 5098 return (ENODEV); 5099 } 5100 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5101 dev = flp->nfsfl_dev; 5102 else 5103 dev = flp->nfsfl_ffm[0].dev; 5104 tdip = nfscl_finddevinfo(clp, dev); 5105 if (tdip != NULL) { 5106 tdip->nfsdi_layoutrefs++; 5107 flp->nfsfl_devp = tdip; 5108 nfscl_reldevinfo_locked(tdip); 5109 NFSUNLOCKCLSTATE(); 5110 if (dip != NULL) 5111 free(dip, M_NFSDEVINFO); 5112 return (0); 5113 } 5114 if (dip != NULL) { 5115 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5116 dip->nfsdi_layoutrefs = 1; 5117 flp->nfsfl_devp = dip; 5118 } 5119 NFSUNLOCKCLSTATE(); 5120 if (dip == NULL) 5121 return (ENODEV); 5122 return (0); 5123 } 5124 5125 /* 5126 * Free up a layout structure and associated file layout structure(s). 5127 */ 5128 APPLESTATIC void 5129 nfscl_freelayout(struct nfscllayout *layp) 5130 { 5131 struct nfsclflayout *flp, *nflp; 5132 struct nfsclrecalllayout *rp, *nrp; 5133 5134 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5135 LIST_REMOVE(flp, nfsfl_list); 5136 nfscl_freeflayout(flp); 5137 } 5138 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5139 LIST_REMOVE(flp, nfsfl_list); 5140 nfscl_freeflayout(flp); 5141 } 5142 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5143 LIST_REMOVE(rp, nfsrecly_list); 5144 free(rp, M_NFSLAYRECALL); 5145 } 5146 nfscl_layoutcnt--; 5147 free(layp, M_NFSLAYOUT); 5148 } 5149 5150 /* 5151 * Free up a file layout structure. 5152 */ 5153 APPLESTATIC void 5154 nfscl_freeflayout(struct nfsclflayout *flp) 5155 { 5156 int i, j; 5157 5158 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5159 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5160 free(flp->nfsfl_fh[i], M_NFSFH); 5161 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0) 5162 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) 5163 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++) 5164 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH); 5165 if (flp->nfsfl_devp != NULL) 5166 flp->nfsfl_devp->nfsdi_layoutrefs--; 5167 free(flp, M_NFSFLAYOUT); 5168 } 5169 5170 /* 5171 * Free up a file layout devinfo structure. 5172 */ 5173 APPLESTATIC void 5174 nfscl_freedevinfo(struct nfscldevinfo *dip) 5175 { 5176 5177 free(dip, M_NFSDEVINFO); 5178 } 5179 5180 /* 5181 * Mark any layouts that match as recalled. 5182 */ 5183 static int 5184 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5185 uint64_t off, uint64_t len, uint32_t stateseqid, 5186 struct nfsclrecalllayout *recallp) 5187 { 5188 struct nfsclrecalllayout *rp, *orp; 5189 5190 recallp->nfsrecly_recalltype = recalltype; 5191 recallp->nfsrecly_iomode = iomode; 5192 recallp->nfsrecly_stateseqid = stateseqid; 5193 recallp->nfsrecly_off = off; 5194 recallp->nfsrecly_len = len; 5195 /* 5196 * Order the list as file returns first, followed by fsid and any 5197 * returns, both in increasing stateseqid order. 5198 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5199 * (I'm not sure this is correct because I find RFC5661 confusing 5200 * on this, but hopefully it will work ok.) 5201 */ 5202 orp = NULL; 5203 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5204 orp = rp; 5205 if ((recalltype == NFSLAYOUTRETURN_FILE && 5206 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5207 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5208 (recalltype != NFSLAYOUTRETURN_FILE && 5209 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5210 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5211 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5212 break; 5213 } 5214 } 5215 if (rp == NULL) { 5216 if (orp == NULL) 5217 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5218 nfsrecly_list); 5219 else 5220 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5221 } 5222 lyp->nfsly_flags |= NFSLY_RECALL; 5223 return (0); 5224 } 5225 5226 /* 5227 * Compare the two seqids for ordering. The trick is that the seqids can 5228 * wrap around from 0xffffffff->0, so check for the cases where one 5229 * has wrapped around. 5230 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5231 */ 5232 static int 5233 nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5234 { 5235 5236 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5237 /* seqid2 has wrapped around. */ 5238 return (0); 5239 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5240 /* seqid1 has wrapped around. */ 5241 return (1); 5242 if (seqid1 <= seqid2) 5243 return (1); 5244 return (0); 5245 } 5246 5247 /* 5248 * Do a layout return for each of the recalls. 5249 */ 5250 static void 5251 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5252 struct ucred *cred, NFSPROC_T *p) 5253 { 5254 struct nfsclrecalllayout *rp; 5255 nfsv4stateid_t stateid; 5256 int layouttype; 5257 5258 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5259 stateid.seqid = lyp->nfsly_stateid.seqid; 5260 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5261 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5262 else 5263 layouttype = NFSLAYOUT_FLEXFILE; 5264 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5265 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5266 lyp->nfsly_fhlen, 0, layouttype, 5267 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5268 rp->nfsrecly_off, rp->nfsrecly_len, 5269 &stateid, cred, p, NULL); 5270 } 5271 } 5272 5273 /* 5274 * Do the layout commit for a file layout. 5275 */ 5276 static void 5277 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5278 struct ucred *cred, NFSPROC_T *p) 5279 { 5280 struct nfsclflayout *flp; 5281 uint64_t len; 5282 int error, layouttype; 5283 5284 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5285 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5286 else 5287 layouttype = NFSLAYOUT_FLEXFILE; 5288 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5289 if (layouttype == NFSLAYOUT_FLEXFILE && 5290 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) { 5291 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n"); 5292 /* If not supported, don't bother doing it. */ 5293 NFSLOCKMNT(nmp); 5294 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5295 NFSUNLOCKMNT(nmp); 5296 break; 5297 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5298 len = flp->nfsfl_end - flp->nfsfl_off; 5299 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5300 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5301 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5302 layouttype, cred, p, NULL); 5303 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5304 if (error == NFSERR_NOTSUPP) { 5305 /* If not supported, don't bother doing it. */ 5306 NFSLOCKMNT(nmp); 5307 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5308 NFSUNLOCKMNT(nmp); 5309 break; 5310 } 5311 } 5312 } 5313 } 5314 5315 /* 5316 * Commit all layouts for a file (vnode). 5317 */ 5318 int 5319 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5320 { 5321 struct nfsclclient *clp; 5322 struct nfscllayout *lyp; 5323 struct nfsnode *np = VTONFS(vp); 5324 mount_t mp; 5325 struct nfsmount *nmp; 5326 5327 mp = vnode_mount(vp); 5328 nmp = VFSTONFS(mp); 5329 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5330 return (0); 5331 NFSLOCKCLSTATE(); 5332 clp = nmp->nm_clp; 5333 if (clp == NULL) { 5334 NFSUNLOCKCLSTATE(); 5335 return (EPERM); 5336 } 5337 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5338 if (lyp == NULL) { 5339 NFSUNLOCKCLSTATE(); 5340 return (EPERM); 5341 } 5342 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5343 if (NFSCL_FORCEDISM(mp)) { 5344 NFSUNLOCKCLSTATE(); 5345 return (EPERM); 5346 } 5347 tryagain: 5348 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5349 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5350 NFSUNLOCKCLSTATE(); 5351 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5352 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5353 NFSLOCKCLSTATE(); 5354 goto tryagain; 5355 } 5356 nfsv4_relref(&lyp->nfsly_lock); 5357 NFSUNLOCKCLSTATE(); 5358 return (0); 5359 } 5360 5361