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, uint32_t, uint32_t, char *, 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 * https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1894 * 1895 * 1. Set MNTK_UNMOUNTF 1896 * 2. Acquire a standard FreeBSD mutex "m". 1897 * 3. Update some data structures. 1898 * 4. Release mutex "m". 1899 * 1900 * Then, other threads that acquire "m" after step 4 has occurred will 1901 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1902 * step 2 may or may not see MNTK_UNMOUNTF as set. 1903 */ 1904 NFSLOCKCLSTATE(); 1905 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1906 fake_global++; 1907 NFSUNLOCKCLSTATE(); 1908 NFSLOCKCLSTATE(); 1909 } 1910 1911 clp = nmp->nm_clp; 1912 if (clp != NULL) { 1913 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1914 panic("nfscl umount"); 1915 1916 /* 1917 * First, handshake with the nfscl renew thread, to terminate 1918 * it. 1919 */ 1920 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1921 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1922 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1923 "nfsclumnt", hz); 1924 1925 /* 1926 * Now, get the exclusive lock on the client state, so 1927 * that no uses of the state are still in progress. 1928 */ 1929 do { 1930 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1931 NFSCLSTATEMUTEXPTR, NULL); 1932 } while (!igotlock); 1933 NFSUNLOCKCLSTATE(); 1934 1935 /* 1936 * Free up all the state. It will expire on the server, but 1937 * maybe we should do a SetClientId/SetClientIdConfirm so 1938 * the server throws it away? 1939 */ 1940 LIST_REMOVE(clp, nfsc_list); 1941 nfscl_delegreturnall(clp, p); 1942 cred = newnfs_getcred(); 1943 if (NFSHASNFSV4N(nmp)) { 1944 (void)nfsrpc_destroysession(nmp, clp, cred, p); 1945 (void)nfsrpc_destroyclient(nmp, clp, cred, p); 1946 } else 1947 (void)nfsrpc_setclient(nmp, clp, 0, cred, p); 1948 nfscl_cleanclient(clp); 1949 nmp->nm_clp = NULL; 1950 NFSFREECRED(cred); 1951 free(clp, M_NFSCLCLIENT); 1952 } else 1953 NFSUNLOCKCLSTATE(); 1954 } 1955 1956 /* 1957 * This function is called when a server replies with NFSERR_STALECLIENTID 1958 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 1959 * doing Opens and Locks with reclaim. If these fail, it deletes the 1960 * corresponding state. 1961 */ 1962 static void 1963 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1964 { 1965 struct nfsclowner *owp, *nowp; 1966 struct nfsclopen *op, *nop; 1967 struct nfscllockowner *lp, *nlp; 1968 struct nfscllock *lop, *nlop; 1969 struct nfscldeleg *dp, *ndp, *tdp; 1970 struct nfsmount *nmp; 1971 struct ucred *tcred; 1972 struct nfsclopenhead extra_open; 1973 struct nfscldeleghead extra_deleg; 1974 struct nfsreq *rep; 1975 u_int64_t len; 1976 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1977 int i, igotlock = 0, error, trycnt, firstlock; 1978 struct nfscllayout *lyp, *nlyp; 1979 1980 /* 1981 * First, lock the client structure, so everyone else will 1982 * block when trying to use state. 1983 */ 1984 NFSLOCKCLSTATE(); 1985 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1986 do { 1987 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1988 NFSCLSTATEMUTEXPTR, NULL); 1989 } while (!igotlock); 1990 NFSUNLOCKCLSTATE(); 1991 1992 nmp = clp->nfsc_nmp; 1993 if (nmp == NULL) 1994 panic("nfscl recover"); 1995 1996 /* 1997 * For now, just get rid of all layouts. There may be a need 1998 * to do LayoutCommit Ops with reclaim == true later. 1999 */ 2000 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 2001 nfscl_freelayout(lyp); 2002 TAILQ_INIT(&clp->nfsc_layout); 2003 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 2004 LIST_INIT(&clp->nfsc_layouthash[i]); 2005 2006 trycnt = 5; 2007 do { 2008 error = nfsrpc_setclient(nmp, clp, 1, cred, p); 2009 } while ((error == NFSERR_STALECLIENTID || 2010 error == NFSERR_BADSESSION || 2011 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2012 if (error) { 2013 NFSLOCKCLSTATE(); 2014 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 2015 NFSCLFLAGS_RECVRINPROG); 2016 wakeup(&clp->nfsc_flags); 2017 nfsv4_unlock(&clp->nfsc_lock, 0); 2018 NFSUNLOCKCLSTATE(); 2019 return; 2020 } 2021 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2022 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2023 2024 /* 2025 * Mark requests already queued on the server, so that they don't 2026 * initiate another recovery cycle. Any requests already in the 2027 * queue that handle state information will have the old stale 2028 * clientid/stateid and will get a NFSERR_STALESTATEID, 2029 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 2030 * This will be translated to NFSERR_STALEDONTRECOVER when 2031 * R_DONTRECOVER is set. 2032 */ 2033 NFSLOCKREQ(); 2034 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 2035 if (rep->r_nmp == nmp) 2036 rep->r_flags |= R_DONTRECOVER; 2037 } 2038 NFSUNLOCKREQ(); 2039 2040 /* 2041 * Now, mark all delegations "need reclaim". 2042 */ 2043 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 2044 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 2045 2046 TAILQ_INIT(&extra_deleg); 2047 LIST_INIT(&extra_open); 2048 /* 2049 * Now traverse the state lists, doing Open and Lock Reclaims. 2050 */ 2051 tcred = newnfs_getcred(); 2052 owp = LIST_FIRST(&clp->nfsc_owner); 2053 while (owp != NULL) { 2054 nowp = LIST_NEXT(owp, nfsow_list); 2055 owp->nfsow_seqid = 0; 2056 op = LIST_FIRST(&owp->nfsow_open); 2057 while (op != NULL) { 2058 nop = LIST_NEXT(op, nfso_list); 2059 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2060 /* Search for a delegation to reclaim with the open */ 2061 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2062 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2063 continue; 2064 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2065 mode = NFSV4OPEN_ACCESSWRITE; 2066 delegtype = NFSV4OPEN_DELEGATEWRITE; 2067 } else { 2068 mode = NFSV4OPEN_ACCESSREAD; 2069 delegtype = NFSV4OPEN_DELEGATEREAD; 2070 } 2071 if ((op->nfso_mode & mode) == mode && 2072 op->nfso_fhlen == dp->nfsdl_fhlen && 2073 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 2074 break; 2075 } 2076 ndp = dp; 2077 if (dp == NULL) 2078 delegtype = NFSV4OPEN_DELEGATENONE; 2079 newnfs_copycred(&op->nfso_cred, tcred); 2080 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2081 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2082 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2083 tcred, p); 2084 if (!error) { 2085 /* Handle any replied delegation */ 2086 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2087 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2088 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2089 mode = NFSV4OPEN_ACCESSWRITE; 2090 else 2091 mode = NFSV4OPEN_ACCESSREAD; 2092 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2093 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2094 continue; 2095 if ((op->nfso_mode & mode) == mode && 2096 op->nfso_fhlen == dp->nfsdl_fhlen && 2097 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2098 op->nfso_fhlen)) { 2099 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2100 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2101 dp->nfsdl_ace = ndp->nfsdl_ace; 2102 dp->nfsdl_change = ndp->nfsdl_change; 2103 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2104 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2105 dp->nfsdl_flags |= NFSCLDL_RECALL; 2106 free(ndp, M_NFSCLDELEG); 2107 ndp = NULL; 2108 break; 2109 } 2110 } 2111 } 2112 if (ndp != NULL) 2113 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2114 2115 /* and reclaim all byte range locks */ 2116 lp = LIST_FIRST(&op->nfso_lock); 2117 while (lp != NULL) { 2118 nlp = LIST_NEXT(lp, nfsl_list); 2119 lp->nfsl_seqid = 0; 2120 firstlock = 1; 2121 lop = LIST_FIRST(&lp->nfsl_lock); 2122 while (lop != NULL) { 2123 nlop = LIST_NEXT(lop, nfslo_list); 2124 if (lop->nfslo_end == NFS64BITSSET) 2125 len = NFS64BITSSET; 2126 else 2127 len = lop->nfslo_end - lop->nfslo_first; 2128 error = nfscl_trylock(nmp, NULL, 2129 op->nfso_fh, op->nfso_fhlen, lp, 2130 firstlock, 1, lop->nfslo_first, len, 2131 lop->nfslo_type, tcred, p); 2132 if (error != 0) 2133 nfscl_freelock(lop, 0); 2134 else 2135 firstlock = 0; 2136 lop = nlop; 2137 } 2138 /* If no locks, but a lockowner, just delete it. */ 2139 if (LIST_EMPTY(&lp->nfsl_lock)) 2140 nfscl_freelockowner(lp, 0); 2141 lp = nlp; 2142 } 2143 } 2144 } 2145 if (error != 0 && error != NFSERR_BADSESSION) 2146 nfscl_freeopen(op, 0); 2147 op = nop; 2148 } 2149 owp = nowp; 2150 } 2151 2152 /* 2153 * Now, try and get any delegations not yet reclaimed by cobbling 2154 * to-gether an appropriate open. 2155 */ 2156 nowp = NULL; 2157 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2158 while (dp != NULL) { 2159 ndp = TAILQ_NEXT(dp, nfsdl_list); 2160 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2161 if (nowp == NULL) { 2162 nowp = malloc( 2163 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2164 /* 2165 * Name must be as long an largest possible 2166 * NFSV4CL_LOCKNAMELEN. 12 for now. 2167 */ 2168 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2169 NFSV4CL_LOCKNAMELEN); 2170 LIST_INIT(&nowp->nfsow_open); 2171 nowp->nfsow_clp = clp; 2172 nowp->nfsow_seqid = 0; 2173 nowp->nfsow_defunct = 0; 2174 nfscl_lockinit(&nowp->nfsow_rwlock); 2175 } 2176 nop = NULL; 2177 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2178 nop = malloc(sizeof (struct nfsclopen) + 2179 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2180 nop->nfso_own = nowp; 2181 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2182 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2183 delegtype = NFSV4OPEN_DELEGATEWRITE; 2184 } else { 2185 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2186 delegtype = NFSV4OPEN_DELEGATEREAD; 2187 } 2188 nop->nfso_opencnt = 0; 2189 nop->nfso_posixlock = 1; 2190 nop->nfso_fhlen = dp->nfsdl_fhlen; 2191 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2192 LIST_INIT(&nop->nfso_lock); 2193 nop->nfso_stateid.seqid = 0; 2194 nop->nfso_stateid.other[0] = 0; 2195 nop->nfso_stateid.other[1] = 0; 2196 nop->nfso_stateid.other[2] = 0; 2197 newnfs_copycred(&dp->nfsdl_cred, tcred); 2198 newnfs_copyincred(tcred, &nop->nfso_cred); 2199 tdp = NULL; 2200 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2201 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2202 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2203 delegtype, tcred, p); 2204 if (tdp != NULL) { 2205 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2206 mode = NFSV4OPEN_ACCESSWRITE; 2207 else 2208 mode = NFSV4OPEN_ACCESSREAD; 2209 if ((nop->nfso_mode & mode) == mode && 2210 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2211 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2212 nop->nfso_fhlen)) { 2213 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2214 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2215 dp->nfsdl_ace = tdp->nfsdl_ace; 2216 dp->nfsdl_change = tdp->nfsdl_change; 2217 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2218 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2219 dp->nfsdl_flags |= NFSCLDL_RECALL; 2220 free(tdp, M_NFSCLDELEG); 2221 } else { 2222 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2223 } 2224 } 2225 } 2226 if (error) { 2227 if (nop != NULL) 2228 free(nop, M_NFSCLOPEN); 2229 /* 2230 * Couldn't reclaim it, so throw the state 2231 * away. Ouch!! 2232 */ 2233 nfscl_cleandeleg(dp); 2234 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2235 } else { 2236 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2237 } 2238 } 2239 dp = ndp; 2240 } 2241 2242 /* 2243 * Now, get rid of extra Opens and Delegations. 2244 */ 2245 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2246 do { 2247 newnfs_copycred(&op->nfso_cred, tcred); 2248 error = nfscl_tryclose(op, tcred, nmp, p); 2249 if (error == NFSERR_GRACE) 2250 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2251 } while (error == NFSERR_GRACE); 2252 LIST_REMOVE(op, nfso_list); 2253 free(op, M_NFSCLOPEN); 2254 } 2255 if (nowp != NULL) 2256 free(nowp, M_NFSCLOWNER); 2257 2258 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2259 do { 2260 newnfs_copycred(&dp->nfsdl_cred, tcred); 2261 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2262 if (error == NFSERR_GRACE) 2263 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2264 } while (error == NFSERR_GRACE); 2265 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2266 free(dp, M_NFSCLDELEG); 2267 } 2268 2269 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2270 if (NFSHASNFSV4N(nmp)) 2271 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2272 2273 NFSLOCKCLSTATE(); 2274 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2275 wakeup(&clp->nfsc_flags); 2276 nfsv4_unlock(&clp->nfsc_lock, 0); 2277 NFSUNLOCKCLSTATE(); 2278 NFSFREECRED(tcred); 2279 } 2280 2281 /* 2282 * This function is called when a server replies with NFSERR_EXPIRED. 2283 * It deletes all state for the client and does a fresh SetClientId/confirm. 2284 * XXX Someday it should post a signal to the process(es) that hold the 2285 * state, so they know that lock state has been lost. 2286 */ 2287 APPLESTATIC int 2288 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2289 { 2290 struct nfsmount *nmp; 2291 struct ucred *cred; 2292 int igotlock = 0, error, trycnt; 2293 2294 /* 2295 * If the clientid has gone away or a new SetClientid has already 2296 * been done, just return ok. 2297 */ 2298 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2299 return (0); 2300 2301 /* 2302 * First, lock the client structure, so everyone else will 2303 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2304 * that only one thread does the work. 2305 */ 2306 NFSLOCKCLSTATE(); 2307 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2308 do { 2309 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2310 NFSCLSTATEMUTEXPTR, NULL); 2311 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2312 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2313 if (igotlock) 2314 nfsv4_unlock(&clp->nfsc_lock, 0); 2315 NFSUNLOCKCLSTATE(); 2316 return (0); 2317 } 2318 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2319 NFSUNLOCKCLSTATE(); 2320 2321 nmp = clp->nfsc_nmp; 2322 if (nmp == NULL) 2323 panic("nfscl expired"); 2324 cred = newnfs_getcred(); 2325 trycnt = 5; 2326 do { 2327 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 2328 } while ((error == NFSERR_STALECLIENTID || 2329 error == NFSERR_BADSESSION || 2330 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2331 if (error) { 2332 NFSLOCKCLSTATE(); 2333 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2334 } else { 2335 /* 2336 * Expire the state for the client. 2337 */ 2338 nfscl_expireclient(clp, nmp, cred, p); 2339 NFSLOCKCLSTATE(); 2340 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2341 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2342 } 2343 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2344 wakeup(&clp->nfsc_flags); 2345 nfsv4_unlock(&clp->nfsc_lock, 0); 2346 NFSUNLOCKCLSTATE(); 2347 NFSFREECRED(cred); 2348 return (error); 2349 } 2350 2351 /* 2352 * This function inserts a lock in the list after insert_lop. 2353 */ 2354 static void 2355 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2356 struct nfscllock *insert_lop, int local) 2357 { 2358 2359 if ((struct nfscllockowner *)insert_lop == lp) 2360 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2361 else 2362 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2363 if (local) 2364 nfsstatsv1.cllocallocks++; 2365 else 2366 nfsstatsv1.cllocks++; 2367 } 2368 2369 /* 2370 * This function updates the locking for a lock owner and given file. It 2371 * maintains a list of lock ranges ordered on increasing file offset that 2372 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2373 * It always adds new_lop to the list and sometimes uses the one pointed 2374 * at by other_lopp. 2375 * Returns 1 if the locks were modified, 0 otherwise. 2376 */ 2377 static int 2378 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2379 struct nfscllock **other_lopp, int local) 2380 { 2381 struct nfscllock *new_lop = *new_lopp; 2382 struct nfscllock *lop, *tlop, *ilop; 2383 struct nfscllock *other_lop; 2384 int unlock = 0, modified = 0; 2385 u_int64_t tmp; 2386 2387 /* 2388 * Work down the list until the lock is merged. 2389 */ 2390 if (new_lop->nfslo_type == F_UNLCK) 2391 unlock = 1; 2392 ilop = (struct nfscllock *)lp; 2393 lop = LIST_FIRST(&lp->nfsl_lock); 2394 while (lop != NULL) { 2395 /* 2396 * Only check locks for this file that aren't before the start of 2397 * new lock's range. 2398 */ 2399 if (lop->nfslo_end >= new_lop->nfslo_first) { 2400 if (new_lop->nfslo_end < lop->nfslo_first) { 2401 /* 2402 * If the new lock ends before the start of the 2403 * current lock's range, no merge, just insert 2404 * the new lock. 2405 */ 2406 break; 2407 } 2408 if (new_lop->nfslo_type == lop->nfslo_type || 2409 (new_lop->nfslo_first <= lop->nfslo_first && 2410 new_lop->nfslo_end >= lop->nfslo_end)) { 2411 /* 2412 * This lock can be absorbed by the new lock/unlock. 2413 * This happens when it covers the entire range 2414 * of the old lock or is contiguous 2415 * with the old lock and is of the same type or an 2416 * unlock. 2417 */ 2418 if (new_lop->nfslo_type != lop->nfslo_type || 2419 new_lop->nfslo_first != lop->nfslo_first || 2420 new_lop->nfslo_end != lop->nfslo_end) 2421 modified = 1; 2422 if (lop->nfslo_first < new_lop->nfslo_first) 2423 new_lop->nfslo_first = lop->nfslo_first; 2424 if (lop->nfslo_end > new_lop->nfslo_end) 2425 new_lop->nfslo_end = lop->nfslo_end; 2426 tlop = lop; 2427 lop = LIST_NEXT(lop, nfslo_list); 2428 nfscl_freelock(tlop, local); 2429 continue; 2430 } 2431 2432 /* 2433 * All these cases are for contiguous locks that are not the 2434 * same type, so they can't be merged. 2435 */ 2436 if (new_lop->nfslo_first <= lop->nfslo_first) { 2437 /* 2438 * This case is where the new lock overlaps with the 2439 * first part of the old lock. Move the start of the 2440 * old lock to just past the end of the new lock. The 2441 * new lock will be inserted in front of the old, since 2442 * ilop hasn't been updated. (We are done now.) 2443 */ 2444 if (lop->nfslo_first != new_lop->nfslo_end) { 2445 lop->nfslo_first = new_lop->nfslo_end; 2446 modified = 1; 2447 } 2448 break; 2449 } 2450 if (new_lop->nfslo_end >= lop->nfslo_end) { 2451 /* 2452 * This case is where the new lock overlaps with the 2453 * end of the old lock's range. Move the old lock's 2454 * end to just before the new lock's first and insert 2455 * the new lock after the old lock. 2456 * Might not be done yet, since the new lock could 2457 * overlap further locks with higher ranges. 2458 */ 2459 if (lop->nfslo_end != new_lop->nfslo_first) { 2460 lop->nfslo_end = new_lop->nfslo_first; 2461 modified = 1; 2462 } 2463 ilop = lop; 2464 lop = LIST_NEXT(lop, nfslo_list); 2465 continue; 2466 } 2467 /* 2468 * The final case is where the new lock's range is in the 2469 * middle of the current lock's and splits the current lock 2470 * up. Use *other_lopp to handle the second part of the 2471 * split old lock range. (We are done now.) 2472 * For unlock, we use new_lop as other_lop and tmp, since 2473 * other_lop and new_lop are the same for this case. 2474 * We noted the unlock case above, so we don't need 2475 * new_lop->nfslo_type any longer. 2476 */ 2477 tmp = new_lop->nfslo_first; 2478 if (unlock) { 2479 other_lop = new_lop; 2480 *new_lopp = NULL; 2481 } else { 2482 other_lop = *other_lopp; 2483 *other_lopp = NULL; 2484 } 2485 other_lop->nfslo_first = new_lop->nfslo_end; 2486 other_lop->nfslo_end = lop->nfslo_end; 2487 other_lop->nfslo_type = lop->nfslo_type; 2488 lop->nfslo_end = tmp; 2489 nfscl_insertlock(lp, other_lop, lop, local); 2490 ilop = lop; 2491 modified = 1; 2492 break; 2493 } 2494 ilop = lop; 2495 lop = LIST_NEXT(lop, nfslo_list); 2496 if (lop == NULL) 2497 break; 2498 } 2499 2500 /* 2501 * Insert the new lock in the list at the appropriate place. 2502 */ 2503 if (!unlock) { 2504 nfscl_insertlock(lp, new_lop, ilop, local); 2505 *new_lopp = NULL; 2506 modified = 1; 2507 } 2508 return (modified); 2509 } 2510 2511 /* 2512 * This function must be run as a kernel thread. 2513 * It does Renew Ops and recovery, when required. 2514 */ 2515 APPLESTATIC void 2516 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2517 { 2518 struct nfsclowner *owp, *nowp; 2519 struct nfsclopen *op; 2520 struct nfscllockowner *lp, *nlp; 2521 struct nfscldeleghead dh; 2522 struct nfscldeleg *dp, *ndp; 2523 struct ucred *cred; 2524 u_int32_t clidrev; 2525 int error, cbpathdown, islept, igotlock, ret, clearok; 2526 uint32_t recover_done_time = 0; 2527 time_t mytime; 2528 static time_t prevsec = 0; 2529 struct nfscllockownerfh *lfhp, *nlfhp; 2530 struct nfscllockownerfhhead lfh; 2531 struct nfscllayout *lyp, *nlyp; 2532 struct nfscldevinfo *dip, *ndip; 2533 struct nfscllayouthead rlh; 2534 struct nfsclrecalllayout *recallp; 2535 struct nfsclds *dsp; 2536 2537 cred = newnfs_getcred(); 2538 NFSLOCKCLSTATE(); 2539 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2540 NFSUNLOCKCLSTATE(); 2541 for(;;) { 2542 newnfs_setroot(cred); 2543 cbpathdown = 0; 2544 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2545 /* 2546 * Only allow one recover within 1/2 of the lease 2547 * duration (nfsc_renew). 2548 */ 2549 if (recover_done_time < NFSD_MONOSEC) { 2550 recover_done_time = NFSD_MONOSEC + 2551 clp->nfsc_renew; 2552 NFSCL_DEBUG(1, "Doing recovery..\n"); 2553 nfscl_recover(clp, cred, p); 2554 } else { 2555 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n", 2556 recover_done_time, (intmax_t)NFSD_MONOSEC); 2557 NFSLOCKCLSTATE(); 2558 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2559 NFSUNLOCKCLSTATE(); 2560 } 2561 } 2562 if (clp->nfsc_expire <= NFSD_MONOSEC && 2563 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2564 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2565 clidrev = clp->nfsc_clientidrev; 2566 error = nfsrpc_renew(clp, NULL, cred, p); 2567 if (error == NFSERR_CBPATHDOWN) 2568 cbpathdown = 1; 2569 else if (error == NFSERR_STALECLIENTID || 2570 error == NFSERR_BADSESSION) { 2571 NFSLOCKCLSTATE(); 2572 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2573 NFSUNLOCKCLSTATE(); 2574 } else if (error == NFSERR_EXPIRED) 2575 (void) nfscl_hasexpired(clp, clidrev, p); 2576 } 2577 2578 checkdsrenew: 2579 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2580 /* Do renews for any DS sessions. */ 2581 NFSLOCKMNT(clp->nfsc_nmp); 2582 /* Skip first entry, since the MDS is handled above. */ 2583 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2584 if (dsp != NULL) 2585 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2586 while (dsp != NULL) { 2587 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2588 dsp->nfsclds_sess.nfsess_defunct == 0) { 2589 dsp->nfsclds_expire = NFSD_MONOSEC + 2590 clp->nfsc_renew; 2591 NFSUNLOCKMNT(clp->nfsc_nmp); 2592 (void)nfsrpc_renew(clp, dsp, cred, p); 2593 goto checkdsrenew; 2594 } 2595 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2596 } 2597 NFSUNLOCKMNT(clp->nfsc_nmp); 2598 } 2599 2600 TAILQ_INIT(&dh); 2601 NFSLOCKCLSTATE(); 2602 if (cbpathdown) 2603 /* It's a Total Recall! */ 2604 nfscl_totalrecall(clp); 2605 2606 /* 2607 * Now, handle defunct owners. 2608 */ 2609 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2610 if (LIST_EMPTY(&owp->nfsow_open)) { 2611 if (owp->nfsow_defunct != 0) 2612 nfscl_freeopenowner(owp, 0); 2613 } 2614 } 2615 2616 /* 2617 * Do the recall on any delegations. To avoid trouble, always 2618 * come back up here after having slept. 2619 */ 2620 igotlock = 0; 2621 tryagain: 2622 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2623 while (dp != NULL) { 2624 ndp = TAILQ_NEXT(dp, nfsdl_list); 2625 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2626 /* 2627 * Wait for outstanding I/O ops to be done. 2628 */ 2629 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2630 if (igotlock) { 2631 nfsv4_unlock(&clp->nfsc_lock, 0); 2632 igotlock = 0; 2633 } 2634 dp->nfsdl_rwlock.nfslock_lock |= 2635 NFSV4LOCK_WANTED; 2636 (void) nfsmsleep(&dp->nfsdl_rwlock, 2637 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2638 NULL); 2639 goto tryagain; 2640 } 2641 while (!igotlock) { 2642 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2643 &islept, NFSCLSTATEMUTEXPTR, NULL); 2644 if (islept) 2645 goto tryagain; 2646 } 2647 NFSUNLOCKCLSTATE(); 2648 newnfs_copycred(&dp->nfsdl_cred, cred); 2649 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2650 NULL, cred, p, 1); 2651 if (!ret) { 2652 nfscl_cleandeleg(dp); 2653 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2654 nfsdl_list); 2655 LIST_REMOVE(dp, nfsdl_hash); 2656 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2657 nfscl_delegcnt--; 2658 nfsstatsv1.cldelegates--; 2659 } 2660 NFSLOCKCLSTATE(); 2661 } 2662 dp = ndp; 2663 } 2664 2665 /* 2666 * Clear out old delegations, if we are above the high water 2667 * mark. Only clear out ones with no state related to them. 2668 * The tailq list is in LRU order. 2669 */ 2670 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2671 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2672 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2673 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2674 dp->nfsdl_rwlock.nfslock_lock == 0 && 2675 dp->nfsdl_timestamp < NFSD_MONOSEC && 2676 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2677 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2678 clearok = 1; 2679 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2680 op = LIST_FIRST(&owp->nfsow_open); 2681 if (op != NULL) { 2682 clearok = 0; 2683 break; 2684 } 2685 } 2686 if (clearok) { 2687 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2688 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2689 clearok = 0; 2690 break; 2691 } 2692 } 2693 } 2694 if (clearok) { 2695 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2696 LIST_REMOVE(dp, nfsdl_hash); 2697 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2698 nfscl_delegcnt--; 2699 nfsstatsv1.cldelegates--; 2700 } 2701 } 2702 dp = ndp; 2703 } 2704 if (igotlock) 2705 nfsv4_unlock(&clp->nfsc_lock, 0); 2706 2707 /* 2708 * Do the recall on any layouts. To avoid trouble, always 2709 * come back up here after having slept. 2710 */ 2711 TAILQ_INIT(&rlh); 2712 tryagain2: 2713 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2714 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2715 /* 2716 * Wait for outstanding I/O ops to be done. 2717 */ 2718 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2719 (lyp->nfsly_lock.nfslock_lock & 2720 NFSV4LOCK_LOCK) != 0) { 2721 lyp->nfsly_lock.nfslock_lock |= 2722 NFSV4LOCK_WANTED; 2723 nfsmsleep(&lyp->nfsly_lock.nfslock_lock, 2724 NFSCLSTATEMUTEXPTR, PZERO, "nfslyp", 2725 NULL); 2726 goto tryagain2; 2727 } 2728 /* Move the layout to the recall list. */ 2729 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2730 nfsly_list); 2731 LIST_REMOVE(lyp, nfsly_hash); 2732 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2733 2734 /* Handle any layout commits. */ 2735 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2736 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2737 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2738 NFSUNLOCKCLSTATE(); 2739 NFSCL_DEBUG(3, "do layoutcommit\n"); 2740 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2741 cred, p); 2742 NFSLOCKCLSTATE(); 2743 goto tryagain2; 2744 } 2745 } 2746 } 2747 2748 /* Now, look for stale layouts. */ 2749 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2750 while (lyp != NULL) { 2751 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2752 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2753 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2754 lyp->nfsly_lock.nfslock_usecnt == 0 && 2755 lyp->nfsly_lock.nfslock_lock == 0) { 2756 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2757 nfscl_layoutcnt); 2758 recallp = malloc(sizeof(*recallp), 2759 M_NFSLAYRECALL, M_NOWAIT); 2760 if (recallp == NULL) 2761 break; 2762 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2763 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2764 lyp->nfsly_stateid.seqid, 0, 0, NULL, 2765 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 #ifdef DIAGNOSTIC 3192 KASSERT((op->nfso_opencnt == 0), 3193 ("nfscl: bad open cnt on server (%d)", 3194 op->nfso_opencnt)); 3195 #endif 3196 NFSUNLOCKCLSTATE(); 3197 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 3198 p); 3199 NFSLOCKCLSTATE(); 3200 goto lookformore; 3201 } 3202 op = LIST_NEXT(op, nfso_list); 3203 } 3204 } 3205 NFSUNLOCKCLSTATE(); 3206 /* 3207 * recallp has been set NULL by nfscl_retoncloselayout() if it was 3208 * used by the function, but calling free() with a NULL pointer is ok. 3209 */ 3210 free(recallp, M_NFSLAYRECALL); 3211 return (0); 3212 } 3213 3214 /* 3215 * Return all delegations on this client. 3216 * (Must be called with client sleep lock.) 3217 */ 3218 static void 3219 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3220 { 3221 struct nfscldeleg *dp, *ndp; 3222 struct ucred *cred; 3223 3224 cred = newnfs_getcred(); 3225 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3226 nfscl_cleandeleg(dp); 3227 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3228 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3229 } 3230 NFSFREECRED(cred); 3231 } 3232 3233 /* 3234 * Do a callback RPC. 3235 */ 3236 APPLESTATIC void 3237 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3238 { 3239 int clist, gotseq_ok, i, j, k, op, rcalls; 3240 u_int32_t *tl; 3241 struct nfsclclient *clp; 3242 struct nfscldeleg *dp = NULL; 3243 int numops, taglen = -1, error = 0, trunc __unused; 3244 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3245 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3246 vnode_t vp = NULL; 3247 struct nfsnode *np; 3248 struct vattr va; 3249 struct nfsfh *nfhp; 3250 mount_t mp; 3251 nfsattrbit_t attrbits, rattrbits; 3252 nfsv4stateid_t stateid; 3253 uint32_t seqid, slotid = 0, highslot, cachethis __unused; 3254 uint8_t sessionid[NFSX_V4SESSIONID]; 3255 struct mbuf *rep; 3256 struct nfscllayout *lyp; 3257 uint64_t filesid[2], len, off; 3258 int changed, gotone, laytype, recalltype; 3259 uint32_t iomode; 3260 struct nfsclrecalllayout *recallp = NULL; 3261 struct nfsclsession *tsep; 3262 3263 gotseq_ok = 0; 3264 nfsrvd_rephead(nd); 3265 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3266 taglen = fxdr_unsigned(int, *tl); 3267 if (taglen < 0) { 3268 error = EBADRPC; 3269 goto nfsmout; 3270 } 3271 if (taglen <= NFSV4_SMALLSTR) 3272 tagstr = tag; 3273 else 3274 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3275 error = nfsrv_mtostr(nd, tagstr, taglen); 3276 if (error) { 3277 if (taglen > NFSV4_SMALLSTR) 3278 free(tagstr, M_TEMP); 3279 taglen = -1; 3280 goto nfsmout; 3281 } 3282 (void) nfsm_strtom(nd, tag, taglen); 3283 if (taglen > NFSV4_SMALLSTR) { 3284 free(tagstr, M_TEMP); 3285 } 3286 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3287 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3288 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3289 if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION) 3290 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3291 cbident = fxdr_unsigned(u_int32_t, *tl++); 3292 if (nd->nd_repstat) 3293 numops = 0; 3294 else 3295 numops = fxdr_unsigned(int, *tl); 3296 /* 3297 * Loop around doing the sub ops. 3298 */ 3299 for (i = 0; i < numops; i++) { 3300 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3301 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3302 *repp++ = *tl; 3303 op = fxdr_unsigned(int, *tl); 3304 if (op < NFSV4OP_CBGETATTR || 3305 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3306 (op > NFSV4OP_CBNOTIFYDEVID && 3307 minorvers == NFSV41_MINORVERSION)) { 3308 nd->nd_repstat = NFSERR_OPILLEGAL; 3309 *repp = nfscl_errmap(nd, minorvers); 3310 retops++; 3311 break; 3312 } 3313 nd->nd_procnum = op; 3314 if (op < NFSV41_CBNOPS) 3315 nfsstatsv1.cbrpccnt[nd->nd_procnum]++; 3316 switch (op) { 3317 case NFSV4OP_CBGETATTR: 3318 NFSCL_DEBUG(4, "cbgetattr\n"); 3319 mp = NULL; 3320 vp = NULL; 3321 error = nfsm_getfh(nd, &nfhp); 3322 if (!error) 3323 error = nfsrv_getattrbits(nd, &attrbits, 3324 NULL, NULL); 3325 if (error == 0 && i == 0 && 3326 minorvers != NFSV4_MINORVERSION) 3327 error = NFSERR_OPNOTINSESS; 3328 if (!error) { 3329 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3330 &clp); 3331 if (mp == NULL) 3332 error = NFSERR_SERVERFAULT; 3333 } 3334 if (!error) { 3335 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3336 nfhp->nfh_len, p, &np); 3337 if (!error) 3338 vp = NFSTOV(np); 3339 } 3340 if (!error) { 3341 NFSZERO_ATTRBIT(&rattrbits); 3342 NFSLOCKCLSTATE(); 3343 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3344 nfhp->nfh_len); 3345 if (dp != NULL) { 3346 if (NFSISSET_ATTRBIT(&attrbits, 3347 NFSATTRBIT_SIZE)) { 3348 if (vp != NULL) 3349 va.va_size = np->n_size; 3350 else 3351 va.va_size = 3352 dp->nfsdl_size; 3353 NFSSETBIT_ATTRBIT(&rattrbits, 3354 NFSATTRBIT_SIZE); 3355 } 3356 if (NFSISSET_ATTRBIT(&attrbits, 3357 NFSATTRBIT_CHANGE)) { 3358 va.va_filerev = 3359 dp->nfsdl_change; 3360 if (vp == NULL || 3361 (np->n_flag & NDELEGMOD)) 3362 va.va_filerev++; 3363 NFSSETBIT_ATTRBIT(&rattrbits, 3364 NFSATTRBIT_CHANGE); 3365 } 3366 } else 3367 error = NFSERR_SERVERFAULT; 3368 NFSUNLOCKCLSTATE(); 3369 } 3370 if (vp != NULL) 3371 vrele(vp); 3372 if (mp != NULL) 3373 vfs_unbusy(mp); 3374 if (nfhp != NULL) 3375 free(nfhp, M_NFSFH); 3376 if (!error) 3377 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3378 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3379 (uint64_t)0, NULL); 3380 break; 3381 case NFSV4OP_CBRECALL: 3382 NFSCL_DEBUG(4, "cbrecall\n"); 3383 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3384 NFSX_UNSIGNED); 3385 stateid.seqid = *tl++; 3386 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3387 NFSX_STATEIDOTHER); 3388 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3389 trunc = fxdr_unsigned(int, *tl); 3390 error = nfsm_getfh(nd, &nfhp); 3391 if (error == 0 && i == 0 && 3392 minorvers != NFSV4_MINORVERSION) 3393 error = NFSERR_OPNOTINSESS; 3394 if (!error) { 3395 NFSLOCKCLSTATE(); 3396 if (minorvers == NFSV4_MINORVERSION) 3397 clp = nfscl_getclnt(cbident); 3398 else 3399 clp = nfscl_getclntsess(sessionid); 3400 if (clp != NULL) { 3401 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3402 nfhp->nfh_len); 3403 if (dp != NULL && (dp->nfsdl_flags & 3404 NFSCLDL_DELEGRET) == 0) { 3405 dp->nfsdl_flags |= 3406 NFSCLDL_RECALL; 3407 wakeup((caddr_t)clp); 3408 } 3409 } else { 3410 error = NFSERR_SERVERFAULT; 3411 } 3412 NFSUNLOCKCLSTATE(); 3413 } 3414 if (nfhp != NULL) 3415 free(nfhp, M_NFSFH); 3416 break; 3417 case NFSV4OP_CBLAYOUTRECALL: 3418 NFSCL_DEBUG(4, "cblayrec\n"); 3419 nfhp = NULL; 3420 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3421 laytype = fxdr_unsigned(int, *tl++); 3422 iomode = fxdr_unsigned(uint32_t, *tl++); 3423 if (newnfs_true == *tl++) 3424 changed = 1; 3425 else 3426 changed = 0; 3427 recalltype = fxdr_unsigned(int, *tl); 3428 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n", 3429 laytype, iomode, changed, recalltype); 3430 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3431 M_WAITOK); 3432 if (laytype != NFSLAYOUT_NFSV4_1_FILES && 3433 laytype != NFSLAYOUT_FLEXFILE) 3434 error = NFSERR_NOMATCHLAYOUT; 3435 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3436 error = nfsm_getfh(nd, &nfhp); 3437 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3438 if (error != 0) 3439 goto nfsmout; 3440 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3441 NFSX_STATEID); 3442 off = fxdr_hyper(tl); tl += 2; 3443 len = fxdr_hyper(tl); tl += 2; 3444 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3445 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3446 if (minorvers == NFSV4_MINORVERSION) 3447 error = NFSERR_NOTSUPP; 3448 else if (i == 0) 3449 error = NFSERR_OPNOTINSESS; 3450 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n", 3451 (uintmax_t)off, (uintmax_t)len, 3452 stateid.seqid, error); 3453 if (error == 0) { 3454 NFSLOCKCLSTATE(); 3455 clp = nfscl_getclntsess(sessionid); 3456 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3457 if (clp != NULL) { 3458 lyp = nfscl_findlayout(clp, 3459 nfhp->nfh_fh, 3460 nfhp->nfh_len); 3461 NFSCL_DEBUG(4, "cblyp=%p\n", 3462 lyp); 3463 if (lyp != NULL && 3464 (lyp->nfsly_flags & 3465 (NFSLY_FILES | 3466 NFSLY_FLEXFILE)) != 0 && 3467 !NFSBCMP(stateid.other, 3468 lyp->nfsly_stateid.other, 3469 NFSX_STATEIDOTHER)) { 3470 error = 3471 nfscl_layoutrecall( 3472 recalltype, 3473 lyp, iomode, off, 3474 len, stateid.seqid, 3475 0, 0, NULL, 3476 recallp); 3477 recallp = NULL; 3478 wakeup(clp); 3479 NFSCL_DEBUG(4, 3480 "aft layrcal=%d\n", 3481 error); 3482 } else 3483 error = 3484 NFSERR_NOMATCHLAYOUT; 3485 } else 3486 error = NFSERR_NOMATCHLAYOUT; 3487 NFSUNLOCKCLSTATE(); 3488 } 3489 free(nfhp, M_NFSFH); 3490 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3491 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3492 filesid[0] = fxdr_hyper(tl); tl += 2; 3493 filesid[1] = fxdr_hyper(tl); tl += 2; 3494 gotone = 0; 3495 NFSLOCKCLSTATE(); 3496 clp = nfscl_getclntsess(sessionid); 3497 if (clp != NULL) { 3498 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3499 nfsly_list) { 3500 if (lyp->nfsly_filesid[0] == 3501 filesid[0] && 3502 lyp->nfsly_filesid[1] == 3503 filesid[1]) { 3504 error = 3505 nfscl_layoutrecall( 3506 recalltype, 3507 lyp, iomode, 0, 3508 UINT64_MAX, 3509 lyp->nfsly_stateid.seqid, 3510 0, 0, NULL, 3511 recallp); 3512 recallp = NULL; 3513 gotone = 1; 3514 } 3515 } 3516 if (gotone != 0) 3517 wakeup(clp); 3518 else 3519 error = NFSERR_NOMATCHLAYOUT; 3520 } else 3521 error = NFSERR_NOMATCHLAYOUT; 3522 NFSUNLOCKCLSTATE(); 3523 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3524 gotone = 0; 3525 NFSLOCKCLSTATE(); 3526 clp = nfscl_getclntsess(sessionid); 3527 if (clp != NULL) { 3528 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3529 nfsly_list) { 3530 error = nfscl_layoutrecall( 3531 recalltype, lyp, iomode, 0, 3532 UINT64_MAX, 3533 lyp->nfsly_stateid.seqid, 3534 0, 0, NULL, recallp); 3535 recallp = NULL; 3536 gotone = 1; 3537 } 3538 if (gotone != 0) 3539 wakeup(clp); 3540 else 3541 error = NFSERR_NOMATCHLAYOUT; 3542 } else 3543 error = NFSERR_NOMATCHLAYOUT; 3544 NFSUNLOCKCLSTATE(); 3545 } else 3546 error = NFSERR_NOMATCHLAYOUT; 3547 if (recallp != NULL) { 3548 free(recallp, M_NFSLAYRECALL); 3549 recallp = NULL; 3550 } 3551 break; 3552 case NFSV4OP_CBSEQUENCE: 3553 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3554 5 * NFSX_UNSIGNED); 3555 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3556 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3557 seqid = fxdr_unsigned(uint32_t, *tl++); 3558 slotid = fxdr_unsigned(uint32_t, *tl++); 3559 highslot = fxdr_unsigned(uint32_t, *tl++); 3560 cachethis = *tl++; 3561 /* Throw away the referring call stuff. */ 3562 clist = fxdr_unsigned(int, *tl); 3563 for (j = 0; j < clist; j++) { 3564 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3565 NFSX_UNSIGNED); 3566 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3567 rcalls = fxdr_unsigned(int, *tl); 3568 for (k = 0; k < rcalls; k++) { 3569 NFSM_DISSECT(tl, uint32_t *, 3570 2 * NFSX_UNSIGNED); 3571 } 3572 } 3573 NFSLOCKCLSTATE(); 3574 if (i == 0) { 3575 clp = nfscl_getclntsess(sessionid); 3576 if (clp == NULL) 3577 error = NFSERR_SERVERFAULT; 3578 } else 3579 error = NFSERR_SEQUENCEPOS; 3580 if (error == 0) { 3581 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3582 error = nfsv4_seqsession(seqid, slotid, 3583 highslot, tsep->nfsess_cbslots, &rep, 3584 tsep->nfsess_backslots); 3585 } 3586 NFSUNLOCKCLSTATE(); 3587 if (error == 0 || error == NFSERR_REPLYFROMCACHE) { 3588 gotseq_ok = 1; 3589 if (rep != NULL) { 3590 /* 3591 * Handle a reply for a retried 3592 * callback. The reply will be 3593 * re-inserted in the session cache 3594 * by the nfsv4_seqsess_cacherep() call 3595 * after out: 3596 */ 3597 KASSERT(error == NFSERR_REPLYFROMCACHE, 3598 ("cbsequence: non-NULL rep")); 3599 NFSCL_DEBUG(4, "Got cbretry\n"); 3600 m_freem(nd->nd_mreq); 3601 nd->nd_mreq = rep; 3602 rep = NULL; 3603 goto out; 3604 } 3605 NFSM_BUILD(tl, uint32_t *, 3606 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3607 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3608 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3609 *tl++ = txdr_unsigned(seqid); 3610 *tl++ = txdr_unsigned(slotid); 3611 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3612 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3613 } 3614 break; 3615 default: 3616 if (i == 0 && minorvers == NFSV41_MINORVERSION) 3617 error = NFSERR_OPNOTINSESS; 3618 else { 3619 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3620 error = NFSERR_NOTSUPP; 3621 } 3622 break; 3623 } 3624 if (error) { 3625 if (error == EBADRPC || error == NFSERR_BADXDR) { 3626 nd->nd_repstat = NFSERR_BADXDR; 3627 } else { 3628 nd->nd_repstat = error; 3629 } 3630 error = 0; 3631 } 3632 retops++; 3633 if (nd->nd_repstat) { 3634 *repp = nfscl_errmap(nd, minorvers); 3635 break; 3636 } else 3637 *repp = 0; /* NFS4_OK */ 3638 } 3639 nfsmout: 3640 if (recallp != NULL) 3641 free(recallp, M_NFSLAYRECALL); 3642 if (error) { 3643 if (error == EBADRPC || error == NFSERR_BADXDR) 3644 nd->nd_repstat = NFSERR_BADXDR; 3645 else 3646 printf("nfsv4 comperr1=%d\n", error); 3647 } 3648 if (taglen == -1) { 3649 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3650 *tl++ = 0; 3651 *tl = 0; 3652 } else { 3653 *retopsp = txdr_unsigned(retops); 3654 } 3655 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3656 out: 3657 if (gotseq_ok != 0) { 3658 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3659 NFSLOCKCLSTATE(); 3660 clp = nfscl_getclntsess(sessionid); 3661 if (clp != NULL) { 3662 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3663 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3664 NFSERR_OK, &rep); 3665 NFSUNLOCKCLSTATE(); 3666 } else { 3667 NFSUNLOCKCLSTATE(); 3668 m_freem(rep); 3669 } 3670 } 3671 } 3672 3673 /* 3674 * Generate the next cbident value. Basically just increment a static value 3675 * and then check that it isn't already in the list, if it has wrapped around. 3676 */ 3677 static u_int32_t 3678 nfscl_nextcbident(void) 3679 { 3680 struct nfsclclient *clp; 3681 int matched; 3682 static u_int32_t nextcbident = 0; 3683 static int haswrapped = 0; 3684 3685 nextcbident++; 3686 if (nextcbident == 0) 3687 haswrapped = 1; 3688 if (haswrapped) { 3689 /* 3690 * Search the clientid list for one already using this cbident. 3691 */ 3692 do { 3693 matched = 0; 3694 NFSLOCKCLSTATE(); 3695 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3696 if (clp->nfsc_cbident == nextcbident) { 3697 matched = 1; 3698 break; 3699 } 3700 } 3701 NFSUNLOCKCLSTATE(); 3702 if (matched == 1) 3703 nextcbident++; 3704 } while (matched); 3705 } 3706 return (nextcbident); 3707 } 3708 3709 /* 3710 * Get the mount point related to a given cbident or session and busy it. 3711 */ 3712 static mount_t 3713 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3714 struct nfsclclient **clpp) 3715 { 3716 struct nfsclclient *clp; 3717 mount_t mp; 3718 int error; 3719 struct nfsclsession *tsep; 3720 3721 *clpp = NULL; 3722 NFSLOCKCLSTATE(); 3723 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3724 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3725 if (minorvers == NFSV4_MINORVERSION) { 3726 if (clp->nfsc_cbident == cbident) 3727 break; 3728 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3729 NFSX_V4SESSIONID)) 3730 break; 3731 } 3732 if (clp == NULL) { 3733 NFSUNLOCKCLSTATE(); 3734 return (NULL); 3735 } 3736 mp = clp->nfsc_nmp->nm_mountp; 3737 vfs_ref(mp); 3738 NFSUNLOCKCLSTATE(); 3739 error = vfs_busy(mp, 0); 3740 vfs_rel(mp); 3741 if (error != 0) 3742 return (NULL); 3743 *clpp = clp; 3744 return (mp); 3745 } 3746 3747 /* 3748 * Get the clientid pointer related to a given cbident. 3749 */ 3750 static struct nfsclclient * 3751 nfscl_getclnt(u_int32_t cbident) 3752 { 3753 struct nfsclclient *clp; 3754 3755 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3756 if (clp->nfsc_cbident == cbident) 3757 break; 3758 return (clp); 3759 } 3760 3761 /* 3762 * Get the clientid pointer related to a given sessionid. 3763 */ 3764 static struct nfsclclient * 3765 nfscl_getclntsess(uint8_t *sessionid) 3766 { 3767 struct nfsclclient *clp; 3768 struct nfsclsession *tsep; 3769 3770 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3771 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3772 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3773 NFSX_V4SESSIONID)) 3774 break; 3775 } 3776 return (clp); 3777 } 3778 3779 /* 3780 * Search for a lock conflict locally on the client. A conflict occurs if 3781 * - not same owner and overlapping byte range and at least one of them is 3782 * a write lock or this is an unlock. 3783 */ 3784 static int 3785 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3786 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3787 struct nfscllock **lopp) 3788 { 3789 struct nfsclowner *owp; 3790 struct nfsclopen *op; 3791 int ret; 3792 3793 if (dp != NULL) { 3794 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3795 if (ret) 3796 return (ret); 3797 } 3798 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3799 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3800 if (op->nfso_fhlen == fhlen && 3801 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3802 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3803 own, lopp); 3804 if (ret) 3805 return (ret); 3806 } 3807 } 3808 } 3809 return (0); 3810 } 3811 3812 static int 3813 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3814 u_int8_t *own, struct nfscllock **lopp) 3815 { 3816 struct nfscllockowner *lp; 3817 struct nfscllock *lop; 3818 3819 LIST_FOREACH(lp, lhp, nfsl_list) { 3820 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3821 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3822 if (lop->nfslo_first >= nlop->nfslo_end) 3823 break; 3824 if (lop->nfslo_end <= nlop->nfslo_first) 3825 continue; 3826 if (lop->nfslo_type == F_WRLCK || 3827 nlop->nfslo_type == F_WRLCK || 3828 nlop->nfslo_type == F_UNLCK) { 3829 if (lopp != NULL) 3830 *lopp = lop; 3831 return (NFSERR_DENIED); 3832 } 3833 } 3834 } 3835 } 3836 return (0); 3837 } 3838 3839 /* 3840 * Check for a local conflicting lock. 3841 */ 3842 APPLESTATIC int 3843 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3844 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3845 { 3846 struct nfscllock *lop, nlck; 3847 struct nfscldeleg *dp; 3848 struct nfsnode *np; 3849 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3850 int error; 3851 3852 nlck.nfslo_type = fl->l_type; 3853 nlck.nfslo_first = off; 3854 if (len == NFS64BITSSET) { 3855 nlck.nfslo_end = NFS64BITSSET; 3856 } else { 3857 nlck.nfslo_end = off + len; 3858 if (nlck.nfslo_end <= nlck.nfslo_first) 3859 return (NFSERR_INVAL); 3860 } 3861 np = VTONFS(vp); 3862 nfscl_filllockowner(id, own, flags); 3863 NFSLOCKCLSTATE(); 3864 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3865 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3866 &nlck, own, dp, &lop); 3867 if (error != 0) { 3868 fl->l_whence = SEEK_SET; 3869 fl->l_start = lop->nfslo_first; 3870 if (lop->nfslo_end == NFS64BITSSET) 3871 fl->l_len = 0; 3872 else 3873 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3874 fl->l_pid = (pid_t)0; 3875 fl->l_type = lop->nfslo_type; 3876 error = -1; /* no RPC required */ 3877 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3878 fl->l_type == F_RDLCK)) { 3879 /* 3880 * The delegation ensures that there isn't a conflicting 3881 * lock on the server, so return -1 to indicate an RPC 3882 * isn't required. 3883 */ 3884 fl->l_type = F_UNLCK; 3885 error = -1; 3886 } 3887 NFSUNLOCKCLSTATE(); 3888 return (error); 3889 } 3890 3891 /* 3892 * Handle Recall of a delegation. 3893 * The clp must be exclusive locked when this is called. 3894 */ 3895 static int 3896 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3897 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3898 int called_from_renewthread) 3899 { 3900 struct nfsclowner *owp, *lowp, *nowp; 3901 struct nfsclopen *op, *lop; 3902 struct nfscllockowner *lp; 3903 struct nfscllock *lckp; 3904 struct nfsnode *np; 3905 int error = 0, ret, gotvp = 0; 3906 3907 if (vp == NULL) { 3908 /* 3909 * First, get a vnode for the file. This is needed to do RPCs. 3910 */ 3911 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3912 dp->nfsdl_fhlen, p, &np); 3913 if (ret) { 3914 /* 3915 * File isn't open, so nothing to move over to the 3916 * server. 3917 */ 3918 return (0); 3919 } 3920 vp = NFSTOV(np); 3921 gotvp = 1; 3922 } else { 3923 np = VTONFS(vp); 3924 } 3925 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3926 3927 /* 3928 * Ok, if it's a write delegation, flush data to the server, so 3929 * that close/open consistency is retained. 3930 */ 3931 ret = 0; 3932 NFSLOCKNODE(np); 3933 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3934 np->n_flag |= NDELEGRECALL; 3935 NFSUNLOCKNODE(np); 3936 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread); 3937 NFSLOCKNODE(np); 3938 np->n_flag &= ~NDELEGRECALL; 3939 } 3940 NFSINVALATTRCACHE(np); 3941 NFSUNLOCKNODE(np); 3942 if (ret == EIO && called_from_renewthread != 0) { 3943 /* 3944 * If the flush failed with EIO for the renew thread, 3945 * return now, so that the dirty buffer will be flushed 3946 * later. 3947 */ 3948 if (gotvp != 0) 3949 vrele(vp); 3950 return (ret); 3951 } 3952 3953 /* 3954 * Now, for each openowner with opens issued locally, move them 3955 * over to state against the server. 3956 */ 3957 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3958 lop = LIST_FIRST(&lowp->nfsow_open); 3959 if (lop != NULL) { 3960 if (LIST_NEXT(lop, nfso_list) != NULL) 3961 panic("nfsdlg mult opens"); 3962 /* 3963 * Look for the same openowner against the server. 3964 */ 3965 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3966 if (!NFSBCMP(lowp->nfsow_owner, 3967 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3968 newnfs_copycred(&dp->nfsdl_cred, cred); 3969 ret = nfscl_moveopen(vp, clp, nmp, lop, 3970 owp, dp, cred, p); 3971 if (ret == NFSERR_STALECLIENTID || 3972 ret == NFSERR_STALEDONTRECOVER || 3973 ret == NFSERR_BADSESSION) { 3974 if (gotvp) 3975 vrele(vp); 3976 return (ret); 3977 } 3978 if (ret) { 3979 nfscl_freeopen(lop, 1); 3980 if (!error) 3981 error = ret; 3982 } 3983 break; 3984 } 3985 } 3986 3987 /* 3988 * If no openowner found, create one and get an open 3989 * for it. 3990 */ 3991 if (owp == NULL) { 3992 nowp = malloc( 3993 sizeof (struct nfsclowner), M_NFSCLOWNER, 3994 M_WAITOK); 3995 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3996 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3997 dp->nfsdl_fhlen, NULL, NULL); 3998 newnfs_copycred(&dp->nfsdl_cred, cred); 3999 ret = nfscl_moveopen(vp, clp, nmp, lop, 4000 owp, dp, cred, p); 4001 if (ret) { 4002 nfscl_freeopenowner(owp, 0); 4003 if (ret == NFSERR_STALECLIENTID || 4004 ret == NFSERR_STALEDONTRECOVER || 4005 ret == NFSERR_BADSESSION) { 4006 if (gotvp) 4007 vrele(vp); 4008 return (ret); 4009 } 4010 if (ret) { 4011 nfscl_freeopen(lop, 1); 4012 if (!error) 4013 error = ret; 4014 } 4015 } 4016 } 4017 } 4018 } 4019 4020 /* 4021 * Now, get byte range locks for any locks done locally. 4022 */ 4023 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4024 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 4025 newnfs_copycred(&dp->nfsdl_cred, cred); 4026 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 4027 if (ret == NFSERR_STALESTATEID || 4028 ret == NFSERR_STALEDONTRECOVER || 4029 ret == NFSERR_STALECLIENTID || 4030 ret == NFSERR_BADSESSION) { 4031 if (gotvp) 4032 vrele(vp); 4033 return (ret); 4034 } 4035 if (ret && !error) 4036 error = ret; 4037 } 4038 } 4039 if (gotvp) 4040 vrele(vp); 4041 return (error); 4042 } 4043 4044 /* 4045 * Move a locally issued open over to an owner on the state list. 4046 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 4047 * returns with it unlocked. 4048 */ 4049 static int 4050 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4051 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 4052 struct ucred *cred, NFSPROC_T *p) 4053 { 4054 struct nfsclopen *op, *nop; 4055 struct nfscldeleg *ndp; 4056 struct nfsnode *np; 4057 int error = 0, newone; 4058 4059 /* 4060 * First, look for an appropriate open, If found, just increment the 4061 * opencnt in it. 4062 */ 4063 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 4064 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 4065 op->nfso_fhlen == lop->nfso_fhlen && 4066 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 4067 op->nfso_opencnt += lop->nfso_opencnt; 4068 nfscl_freeopen(lop, 1); 4069 return (0); 4070 } 4071 } 4072 4073 /* No appropriate open, so we have to do one against the server. */ 4074 np = VTONFS(vp); 4075 nop = malloc(sizeof (struct nfsclopen) + 4076 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 4077 newone = 0; 4078 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 4079 lop->nfso_fh, lop->nfso_fhlen, cred, &newone); 4080 ndp = dp; 4081 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 4082 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 4083 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 4084 if (error) { 4085 if (newone) 4086 nfscl_freeopen(op, 0); 4087 } else { 4088 op->nfso_mode |= lop->nfso_mode; 4089 op->nfso_opencnt += lop->nfso_opencnt; 4090 nfscl_freeopen(lop, 1); 4091 } 4092 if (nop != NULL) 4093 free(nop, M_NFSCLOPEN); 4094 if (ndp != NULL) { 4095 /* 4096 * What should I do with the returned delegation, since the 4097 * delegation is being recalled? For now, just printf and 4098 * through it away. 4099 */ 4100 printf("Moveopen returned deleg\n"); 4101 free(ndp, M_NFSCLDELEG); 4102 } 4103 return (error); 4104 } 4105 4106 /* 4107 * Recall all delegations on this client. 4108 */ 4109 static void 4110 nfscl_totalrecall(struct nfsclclient *clp) 4111 { 4112 struct nfscldeleg *dp; 4113 4114 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4115 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4116 dp->nfsdl_flags |= NFSCLDL_RECALL; 4117 } 4118 } 4119 4120 /* 4121 * Relock byte ranges. Called for delegation recall and state expiry. 4122 */ 4123 static int 4124 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4125 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4126 NFSPROC_T *p) 4127 { 4128 struct nfscllockowner *nlp; 4129 struct nfsfh *nfhp; 4130 u_int64_t off, len; 4131 int error, newone, donelocally; 4132 4133 off = lop->nfslo_first; 4134 len = lop->nfslo_end - lop->nfslo_first; 4135 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4136 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4137 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4138 if (error || donelocally) 4139 return (error); 4140 nfhp = VTONFS(vp)->n_fhp; 4141 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4142 nfhp->nfh_len, nlp, newone, 0, off, 4143 len, lop->nfslo_type, cred, p); 4144 if (error) 4145 nfscl_freelockowner(nlp, 0); 4146 return (error); 4147 } 4148 4149 /* 4150 * Called to re-open a file. Basically get a vnode for the file handle 4151 * and then call nfsrpc_openrpc() to do the rest. 4152 */ 4153 static int 4154 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4155 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4156 struct ucred *cred, NFSPROC_T *p) 4157 { 4158 struct nfsnode *np; 4159 vnode_t vp; 4160 int error; 4161 4162 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4163 if (error) 4164 return (error); 4165 vp = NFSTOV(np); 4166 if (np->n_v4 != NULL) { 4167 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4168 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4169 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4170 cred, p); 4171 } else { 4172 error = EINVAL; 4173 } 4174 vrele(vp); 4175 return (error); 4176 } 4177 4178 /* 4179 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4180 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4181 * fail. 4182 */ 4183 static int 4184 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4185 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4186 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4187 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4188 { 4189 int error; 4190 4191 do { 4192 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4193 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4194 0, 0); 4195 if (error == NFSERR_DELAY) 4196 (void) nfs_catnap(PZERO, error, "nfstryop"); 4197 } while (error == NFSERR_DELAY); 4198 if (error == EAUTH || error == EACCES) { 4199 /* Try again using system credentials */ 4200 newnfs_setroot(cred); 4201 do { 4202 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4203 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4204 delegtype, cred, p, 1, 0); 4205 if (error == NFSERR_DELAY) 4206 (void) nfs_catnap(PZERO, error, "nfstryop"); 4207 } while (error == NFSERR_DELAY); 4208 } 4209 return (error); 4210 } 4211 4212 /* 4213 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4214 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4215 * cred don't work. 4216 */ 4217 static int 4218 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4219 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4220 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4221 { 4222 struct nfsrv_descript nfsd, *nd = &nfsd; 4223 int error; 4224 4225 do { 4226 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4227 reclaim, off, len, type, cred, p, 0); 4228 if (!error && nd->nd_repstat == NFSERR_DELAY) 4229 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4230 "nfstrylck"); 4231 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4232 if (!error) 4233 error = nd->nd_repstat; 4234 if (error == EAUTH || error == EACCES) { 4235 /* Try again using root credentials */ 4236 newnfs_setroot(cred); 4237 do { 4238 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4239 newone, reclaim, off, len, type, cred, p, 1); 4240 if (!error && nd->nd_repstat == NFSERR_DELAY) 4241 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4242 "nfstrylck"); 4243 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4244 if (!error) 4245 error = nd->nd_repstat; 4246 } 4247 return (error); 4248 } 4249 4250 /* 4251 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4252 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4253 * credentials fail. 4254 */ 4255 static int 4256 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4257 struct nfsmount *nmp, NFSPROC_T *p) 4258 { 4259 int error; 4260 4261 do { 4262 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4263 if (error == NFSERR_DELAY) 4264 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4265 } while (error == NFSERR_DELAY); 4266 if (error == EAUTH || error == EACCES) { 4267 /* Try again using system credentials */ 4268 newnfs_setroot(cred); 4269 do { 4270 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4271 if (error == NFSERR_DELAY) 4272 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4273 } while (error == NFSERR_DELAY); 4274 } 4275 return (error); 4276 } 4277 4278 /* 4279 * Try a close against the server. Just call nfsrpc_closerpc(), 4280 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4281 * credentials fail. 4282 */ 4283 APPLESTATIC int 4284 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4285 struct nfsmount *nmp, NFSPROC_T *p) 4286 { 4287 struct nfsrv_descript nfsd, *nd = &nfsd; 4288 int error; 4289 4290 do { 4291 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4292 if (error == NFSERR_DELAY) 4293 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4294 } while (error == NFSERR_DELAY); 4295 if (error == EAUTH || error == EACCES) { 4296 /* Try again using system credentials */ 4297 newnfs_setroot(cred); 4298 do { 4299 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4300 if (error == NFSERR_DELAY) 4301 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4302 } while (error == NFSERR_DELAY); 4303 } 4304 return (error); 4305 } 4306 4307 /* 4308 * Decide if a delegation on a file permits close without flushing writes 4309 * to the server. This might be a big performance win in some environments. 4310 * (Not useful until the client does caching on local stable storage.) 4311 */ 4312 APPLESTATIC int 4313 nfscl_mustflush(vnode_t vp) 4314 { 4315 struct nfsclclient *clp; 4316 struct nfscldeleg *dp; 4317 struct nfsnode *np; 4318 struct nfsmount *nmp; 4319 4320 np = VTONFS(vp); 4321 nmp = VFSTONFS(vnode_mount(vp)); 4322 if (!NFSHASNFSV4(nmp)) 4323 return (1); 4324 NFSLOCKCLSTATE(); 4325 clp = nfscl_findcl(nmp); 4326 if (clp == NULL) { 4327 NFSUNLOCKCLSTATE(); 4328 return (1); 4329 } 4330 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4331 if (dp != NULL && (dp->nfsdl_flags & 4332 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4333 NFSCLDL_WRITE && 4334 (dp->nfsdl_sizelimit >= np->n_size || 4335 !NFSHASSTRICT3530(nmp))) { 4336 NFSUNLOCKCLSTATE(); 4337 return (0); 4338 } 4339 NFSUNLOCKCLSTATE(); 4340 return (1); 4341 } 4342 4343 /* 4344 * See if a (write) delegation exists for this file. 4345 */ 4346 APPLESTATIC int 4347 nfscl_nodeleg(vnode_t vp, int writedeleg) 4348 { 4349 struct nfsclclient *clp; 4350 struct nfscldeleg *dp; 4351 struct nfsnode *np; 4352 struct nfsmount *nmp; 4353 4354 np = VTONFS(vp); 4355 nmp = VFSTONFS(vnode_mount(vp)); 4356 if (!NFSHASNFSV4(nmp)) 4357 return (1); 4358 NFSLOCKCLSTATE(); 4359 clp = nfscl_findcl(nmp); 4360 if (clp == NULL) { 4361 NFSUNLOCKCLSTATE(); 4362 return (1); 4363 } 4364 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4365 if (dp != NULL && 4366 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4367 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4368 NFSCLDL_WRITE)) { 4369 NFSUNLOCKCLSTATE(); 4370 return (0); 4371 } 4372 NFSUNLOCKCLSTATE(); 4373 return (1); 4374 } 4375 4376 /* 4377 * Look for an associated delegation that should be DelegReturned. 4378 */ 4379 APPLESTATIC int 4380 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4381 { 4382 struct nfsclclient *clp; 4383 struct nfscldeleg *dp; 4384 struct nfsclowner *owp; 4385 struct nfscllockowner *lp; 4386 struct nfsmount *nmp; 4387 struct ucred *cred; 4388 struct nfsnode *np; 4389 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4390 4391 nmp = VFSTONFS(vnode_mount(vp)); 4392 np = VTONFS(vp); 4393 NFSLOCKCLSTATE(); 4394 /* 4395 * Loop around waiting for: 4396 * - outstanding I/O operations on delegations to complete 4397 * - for a delegation on vp that has state, lock the client and 4398 * do a recall 4399 * - return delegation with no state 4400 */ 4401 while (1) { 4402 clp = nfscl_findcl(nmp); 4403 if (clp == NULL) { 4404 NFSUNLOCKCLSTATE(); 4405 return (retcnt); 4406 } 4407 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4408 np->n_fhp->nfh_len); 4409 if (dp != NULL) { 4410 /* 4411 * Wait for outstanding I/O ops to be done. 4412 */ 4413 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4414 if (igotlock) { 4415 nfsv4_unlock(&clp->nfsc_lock, 0); 4416 igotlock = 0; 4417 } 4418 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4419 (void) nfsmsleep(&dp->nfsdl_rwlock, 4420 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4421 continue; 4422 } 4423 needsrecall = 0; 4424 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4425 if (!LIST_EMPTY(&owp->nfsow_open)) { 4426 needsrecall = 1; 4427 break; 4428 } 4429 } 4430 if (!needsrecall) { 4431 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4432 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4433 needsrecall = 1; 4434 break; 4435 } 4436 } 4437 } 4438 if (needsrecall && !triedrecall) { 4439 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4440 islept = 0; 4441 while (!igotlock) { 4442 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4443 &islept, NFSCLSTATEMUTEXPTR, NULL); 4444 if (islept) 4445 break; 4446 } 4447 if (islept) 4448 continue; 4449 NFSUNLOCKCLSTATE(); 4450 cred = newnfs_getcred(); 4451 newnfs_copycred(&dp->nfsdl_cred, cred); 4452 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 4453 NFSFREECRED(cred); 4454 triedrecall = 1; 4455 NFSLOCKCLSTATE(); 4456 nfsv4_unlock(&clp->nfsc_lock, 0); 4457 igotlock = 0; 4458 continue; 4459 } 4460 *stp = dp->nfsdl_stateid; 4461 retcnt = 1; 4462 nfscl_cleandeleg(dp); 4463 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4464 } 4465 if (igotlock) 4466 nfsv4_unlock(&clp->nfsc_lock, 0); 4467 NFSUNLOCKCLSTATE(); 4468 return (retcnt); 4469 } 4470 } 4471 4472 /* 4473 * Look for associated delegation(s) that should be DelegReturned. 4474 */ 4475 APPLESTATIC int 4476 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4477 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4478 { 4479 struct nfsclclient *clp; 4480 struct nfscldeleg *dp; 4481 struct nfsclowner *owp; 4482 struct nfscllockowner *lp; 4483 struct nfsmount *nmp; 4484 struct ucred *cred; 4485 struct nfsnode *np; 4486 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4487 4488 nmp = VFSTONFS(vnode_mount(fvp)); 4489 *gotfdp = 0; 4490 *gottdp = 0; 4491 NFSLOCKCLSTATE(); 4492 /* 4493 * Loop around waiting for: 4494 * - outstanding I/O operations on delegations to complete 4495 * - for a delegation on fvp that has state, lock the client and 4496 * do a recall 4497 * - return delegation(s) with no state. 4498 */ 4499 while (1) { 4500 clp = nfscl_findcl(nmp); 4501 if (clp == NULL) { 4502 NFSUNLOCKCLSTATE(); 4503 return (retcnt); 4504 } 4505 np = VTONFS(fvp); 4506 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4507 np->n_fhp->nfh_len); 4508 if (dp != NULL && *gotfdp == 0) { 4509 /* 4510 * Wait for outstanding I/O ops to be done. 4511 */ 4512 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4513 if (igotlock) { 4514 nfsv4_unlock(&clp->nfsc_lock, 0); 4515 igotlock = 0; 4516 } 4517 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4518 (void) nfsmsleep(&dp->nfsdl_rwlock, 4519 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4520 continue; 4521 } 4522 needsrecall = 0; 4523 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4524 if (!LIST_EMPTY(&owp->nfsow_open)) { 4525 needsrecall = 1; 4526 break; 4527 } 4528 } 4529 if (!needsrecall) { 4530 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4531 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4532 needsrecall = 1; 4533 break; 4534 } 4535 } 4536 } 4537 if (needsrecall && !triedrecall) { 4538 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4539 islept = 0; 4540 while (!igotlock) { 4541 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4542 &islept, NFSCLSTATEMUTEXPTR, NULL); 4543 if (islept) 4544 break; 4545 } 4546 if (islept) 4547 continue; 4548 NFSUNLOCKCLSTATE(); 4549 cred = newnfs_getcred(); 4550 newnfs_copycred(&dp->nfsdl_cred, cred); 4551 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4552 NFSFREECRED(cred); 4553 triedrecall = 1; 4554 NFSLOCKCLSTATE(); 4555 nfsv4_unlock(&clp->nfsc_lock, 0); 4556 igotlock = 0; 4557 continue; 4558 } 4559 *fstp = dp->nfsdl_stateid; 4560 retcnt++; 4561 *gotfdp = 1; 4562 nfscl_cleandeleg(dp); 4563 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4564 } 4565 if (igotlock) { 4566 nfsv4_unlock(&clp->nfsc_lock, 0); 4567 igotlock = 0; 4568 } 4569 if (tvp != NULL) { 4570 np = VTONFS(tvp); 4571 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4572 np->n_fhp->nfh_len); 4573 if (dp != NULL && *gottdp == 0) { 4574 /* 4575 * Wait for outstanding I/O ops to be done. 4576 */ 4577 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4578 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4579 (void) nfsmsleep(&dp->nfsdl_rwlock, 4580 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4581 continue; 4582 } 4583 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4584 if (!LIST_EMPTY(&owp->nfsow_open)) { 4585 NFSUNLOCKCLSTATE(); 4586 return (retcnt); 4587 } 4588 } 4589 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4590 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4591 NFSUNLOCKCLSTATE(); 4592 return (retcnt); 4593 } 4594 } 4595 *tstp = dp->nfsdl_stateid; 4596 retcnt++; 4597 *gottdp = 1; 4598 nfscl_cleandeleg(dp); 4599 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4600 } 4601 } 4602 NFSUNLOCKCLSTATE(); 4603 return (retcnt); 4604 } 4605 } 4606 4607 /* 4608 * Get a reference on the clientid associated with the mount point. 4609 * Return 1 if success, 0 otherwise. 4610 */ 4611 APPLESTATIC int 4612 nfscl_getref(struct nfsmount *nmp) 4613 { 4614 struct nfsclclient *clp; 4615 4616 NFSLOCKCLSTATE(); 4617 clp = nfscl_findcl(nmp); 4618 if (clp == NULL) { 4619 NFSUNLOCKCLSTATE(); 4620 return (0); 4621 } 4622 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4623 NFSUNLOCKCLSTATE(); 4624 return (1); 4625 } 4626 4627 /* 4628 * Release a reference on a clientid acquired with the above call. 4629 */ 4630 APPLESTATIC void 4631 nfscl_relref(struct nfsmount *nmp) 4632 { 4633 struct nfsclclient *clp; 4634 4635 NFSLOCKCLSTATE(); 4636 clp = nfscl_findcl(nmp); 4637 if (clp == NULL) { 4638 NFSUNLOCKCLSTATE(); 4639 return; 4640 } 4641 nfsv4_relref(&clp->nfsc_lock); 4642 NFSUNLOCKCLSTATE(); 4643 } 4644 4645 /* 4646 * Save the size attribute in the delegation, since the nfsnode 4647 * is going away. 4648 */ 4649 APPLESTATIC void 4650 nfscl_reclaimnode(vnode_t vp) 4651 { 4652 struct nfsclclient *clp; 4653 struct nfscldeleg *dp; 4654 struct nfsnode *np = VTONFS(vp); 4655 struct nfsmount *nmp; 4656 4657 nmp = VFSTONFS(vnode_mount(vp)); 4658 if (!NFSHASNFSV4(nmp)) 4659 return; 4660 NFSLOCKCLSTATE(); 4661 clp = nfscl_findcl(nmp); 4662 if (clp == NULL) { 4663 NFSUNLOCKCLSTATE(); 4664 return; 4665 } 4666 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4667 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4668 dp->nfsdl_size = np->n_size; 4669 NFSUNLOCKCLSTATE(); 4670 } 4671 4672 /* 4673 * Get the saved size attribute in the delegation, since it is a 4674 * newly allocated nfsnode. 4675 */ 4676 APPLESTATIC void 4677 nfscl_newnode(vnode_t vp) 4678 { 4679 struct nfsclclient *clp; 4680 struct nfscldeleg *dp; 4681 struct nfsnode *np = VTONFS(vp); 4682 struct nfsmount *nmp; 4683 4684 nmp = VFSTONFS(vnode_mount(vp)); 4685 if (!NFSHASNFSV4(nmp)) 4686 return; 4687 NFSLOCKCLSTATE(); 4688 clp = nfscl_findcl(nmp); 4689 if (clp == NULL) { 4690 NFSUNLOCKCLSTATE(); 4691 return; 4692 } 4693 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4694 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4695 np->n_size = dp->nfsdl_size; 4696 NFSUNLOCKCLSTATE(); 4697 } 4698 4699 /* 4700 * If there is a valid write delegation for this file, set the modtime 4701 * to the local clock time. 4702 */ 4703 APPLESTATIC void 4704 nfscl_delegmodtime(vnode_t vp) 4705 { 4706 struct nfsclclient *clp; 4707 struct nfscldeleg *dp; 4708 struct nfsnode *np = VTONFS(vp); 4709 struct nfsmount *nmp; 4710 4711 nmp = VFSTONFS(vnode_mount(vp)); 4712 if (!NFSHASNFSV4(nmp)) 4713 return; 4714 NFSLOCKCLSTATE(); 4715 clp = nfscl_findcl(nmp); 4716 if (clp == NULL) { 4717 NFSUNLOCKCLSTATE(); 4718 return; 4719 } 4720 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4721 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4722 nanotime(&dp->nfsdl_modtime); 4723 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4724 } 4725 NFSUNLOCKCLSTATE(); 4726 } 4727 4728 /* 4729 * If there is a valid write delegation for this file with a modtime set, 4730 * put that modtime in mtime. 4731 */ 4732 APPLESTATIC void 4733 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4734 { 4735 struct nfsclclient *clp; 4736 struct nfscldeleg *dp; 4737 struct nfsnode *np = VTONFS(vp); 4738 struct nfsmount *nmp; 4739 4740 nmp = VFSTONFS(vnode_mount(vp)); 4741 if (!NFSHASNFSV4(nmp)) 4742 return; 4743 NFSLOCKCLSTATE(); 4744 clp = nfscl_findcl(nmp); 4745 if (clp == NULL) { 4746 NFSUNLOCKCLSTATE(); 4747 return; 4748 } 4749 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4750 if (dp != NULL && 4751 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4752 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4753 *mtime = dp->nfsdl_modtime; 4754 NFSUNLOCKCLSTATE(); 4755 } 4756 4757 static int 4758 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4759 { 4760 short *defaulterrp, *errp; 4761 4762 if (!nd->nd_repstat) 4763 return (0); 4764 if (nd->nd_procnum == NFSPROC_NOOP) 4765 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4766 if (nd->nd_repstat == EBADRPC) 4767 return (txdr_unsigned(NFSERR_BADXDR)); 4768 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4769 nd->nd_repstat == NFSERR_OPILLEGAL) 4770 return (txdr_unsigned(nd->nd_repstat)); 4771 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4772 minorvers > NFSV4_MINORVERSION) { 4773 /* NFSv4.n error. */ 4774 return (txdr_unsigned(nd->nd_repstat)); 4775 } 4776 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4777 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4778 else 4779 return (txdr_unsigned(nd->nd_repstat)); 4780 while (*++errp) 4781 if (*errp == (short)nd->nd_repstat) 4782 return (txdr_unsigned(nd->nd_repstat)); 4783 return (txdr_unsigned(*defaulterrp)); 4784 } 4785 4786 /* 4787 * Called to find/add a layout to a client. 4788 * This function returns the layout with a refcnt (shared lock) upon 4789 * success (returns 0) or with no lock/refcnt on the layout when an 4790 * error is returned. 4791 * If a layout is passed in via lypp, it is locked (exclusively locked). 4792 */ 4793 APPLESTATIC int 4794 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4795 nfsv4stateid_t *stateidp, int layouttype, int retonclose, 4796 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4797 struct ucred *cred, NFSPROC_T *p) 4798 { 4799 struct nfsclclient *clp; 4800 struct nfscllayout *lyp, *tlyp; 4801 struct nfsclflayout *flp; 4802 struct nfsnode *np = VTONFS(vp); 4803 mount_t mp; 4804 int layout_passed_in; 4805 4806 mp = nmp->nm_mountp; 4807 layout_passed_in = 1; 4808 tlyp = NULL; 4809 lyp = *lypp; 4810 if (lyp == NULL) { 4811 layout_passed_in = 0; 4812 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4813 M_WAITOK | M_ZERO); 4814 } 4815 4816 NFSLOCKCLSTATE(); 4817 clp = nmp->nm_clp; 4818 if (clp == NULL) { 4819 if (layout_passed_in != 0) 4820 nfsv4_unlock(&lyp->nfsly_lock, 0); 4821 NFSUNLOCKCLSTATE(); 4822 if (tlyp != NULL) 4823 free(tlyp, M_NFSLAYOUT); 4824 return (EPERM); 4825 } 4826 if (lyp == NULL) { 4827 /* 4828 * Although no lyp was passed in, another thread might have 4829 * allocated one. If one is found, just increment it's ref 4830 * count and return it. 4831 */ 4832 lyp = nfscl_findlayout(clp, fhp, fhlen); 4833 if (lyp == NULL) { 4834 lyp = tlyp; 4835 tlyp = NULL; 4836 lyp->nfsly_stateid.seqid = stateidp->seqid; 4837 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 4838 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 4839 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 4840 lyp->nfsly_lastbyte = 0; 4841 LIST_INIT(&lyp->nfsly_flayread); 4842 LIST_INIT(&lyp->nfsly_flayrw); 4843 LIST_INIT(&lyp->nfsly_recall); 4844 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 4845 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 4846 lyp->nfsly_clp = clp; 4847 if (layouttype == NFSLAYOUT_FLEXFILE) 4848 lyp->nfsly_flags = NFSLY_FLEXFILE; 4849 else 4850 lyp->nfsly_flags = NFSLY_FILES; 4851 if (retonclose != 0) 4852 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4853 lyp->nfsly_fhlen = fhlen; 4854 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 4855 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4856 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 4857 nfsly_hash); 4858 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4859 nfscl_layoutcnt++; 4860 } else { 4861 if (retonclose != 0) 4862 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4863 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4864 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4865 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4866 } 4867 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 4868 if (NFSCL_FORCEDISM(mp)) { 4869 NFSUNLOCKCLSTATE(); 4870 if (tlyp != NULL) 4871 free(tlyp, M_NFSLAYOUT); 4872 return (EPERM); 4873 } 4874 *lypp = lyp; 4875 } else 4876 lyp->nfsly_stateid.seqid = stateidp->seqid; 4877 4878 /* Merge the new list of File Layouts into the list. */ 4879 flp = LIST_FIRST(fhlp); 4880 if (flp != NULL) { 4881 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 4882 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 4883 else 4884 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 4885 } 4886 if (layout_passed_in != 0) 4887 nfsv4_unlock(&lyp->nfsly_lock, 1); 4888 NFSUNLOCKCLSTATE(); 4889 if (tlyp != NULL) 4890 free(tlyp, M_NFSLAYOUT); 4891 return (0); 4892 } 4893 4894 /* 4895 * Search for a layout by MDS file handle. 4896 * If one is found, it is returned with a refcnt (shared lock) iff 4897 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 4898 * returned NULL. 4899 */ 4900 struct nfscllayout * 4901 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 4902 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 4903 { 4904 struct nfscllayout *lyp; 4905 mount_t mp; 4906 int error, igotlock; 4907 4908 mp = clp->nfsc_nmp->nm_mountp; 4909 *recalledp = 0; 4910 *retflpp = NULL; 4911 NFSLOCKCLSTATE(); 4912 lyp = nfscl_findlayout(clp, fhp, fhlen); 4913 if (lyp != NULL) { 4914 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4915 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4916 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4917 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4918 error = nfscl_findlayoutforio(lyp, off, 4919 NFSV4OPEN_ACCESSREAD, retflpp); 4920 if (error == 0) 4921 nfsv4_getref(&lyp->nfsly_lock, NULL, 4922 NFSCLSTATEMUTEXPTR, mp); 4923 else { 4924 do { 4925 igotlock = nfsv4_lock(&lyp->nfsly_lock, 4926 1, NULL, NFSCLSTATEMUTEXPTR, mp); 4927 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp)); 4928 *retflpp = NULL; 4929 } 4930 if (NFSCL_FORCEDISM(mp)) { 4931 lyp = NULL; 4932 *recalledp = 1; 4933 } 4934 } else { 4935 lyp = NULL; 4936 *recalledp = 1; 4937 } 4938 } 4939 NFSUNLOCKCLSTATE(); 4940 return (lyp); 4941 } 4942 4943 /* 4944 * Search for a layout by MDS file handle. If one is found, mark in to be 4945 * recalled, if it already marked "return on close". 4946 */ 4947 static void 4948 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp, 4949 int fhlen, struct nfsclrecalllayout **recallpp) 4950 { 4951 struct nfscllayout *lyp; 4952 uint32_t iomode; 4953 4954 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) || 4955 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 || 4956 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0) 4957 return; 4958 lyp = nfscl_findlayout(clp, fhp, fhlen); 4959 if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE | 4960 NFSLY_RECALL)) == NFSLY_RETONCLOSE) { 4961 iomode = 0; 4962 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 4963 iomode |= NFSLAYOUTIOMODE_READ; 4964 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 4965 iomode |= NFSLAYOUTIOMODE_RW; 4966 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 4967 0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL, 4968 *recallpp); 4969 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode); 4970 *recallpp = NULL; 4971 } 4972 } 4973 4974 /* 4975 * Mark the layout to be recalled and with an error. 4976 * Also, disable the dsp from further use. 4977 */ 4978 void 4979 nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp, 4980 struct nfscllayout *lyp, struct nfsclds *dsp) 4981 { 4982 struct nfsclrecalllayout *recallp; 4983 uint32_t iomode; 4984 4985 printf("DS being disabled, error=%d\n", stat); 4986 /* Set up the return of the layout. */ 4987 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 4988 iomode = 0; 4989 NFSLOCKCLSTATE(); 4990 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4991 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 4992 iomode |= NFSLAYOUTIOMODE_READ; 4993 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 4994 iomode |= NFSLAYOUTIOMODE_RW; 4995 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 4996 0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op, 4997 dp->nfsdi_deviceid, recallp); 4998 NFSUNLOCKCLSTATE(); 4999 NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode); 5000 } else { 5001 NFSUNLOCKCLSTATE(); 5002 free(recallp, M_NFSLAYRECALL); 5003 } 5004 5005 /* And shut the TCP connection down. */ 5006 nfscl_cancelreqs(dsp); 5007 } 5008 5009 /* 5010 * Cancel all RPCs for this "dsp" by closing the connection. 5011 * Also, mark the session as defunct. 5012 * If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and 5013 * cannot be shut down. 5014 */ 5015 APPLESTATIC void 5016 nfscl_cancelreqs(struct nfsclds *dsp) 5017 { 5018 struct __rpc_client *cl; 5019 static int non_event; 5020 5021 NFSLOCKDS(dsp); 5022 if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 && 5023 dsp->nfsclds_sockp != NULL && 5024 dsp->nfsclds_sockp->nr_client != NULL) { 5025 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 5026 cl = dsp->nfsclds_sockp->nr_client; 5027 dsp->nfsclds_sess.nfsess_defunct = 1; 5028 NFSUNLOCKDS(dsp); 5029 CLNT_CLOSE(cl); 5030 /* 5031 * This 1sec sleep is done to reduce the number of reconnect 5032 * attempts made on the DS while it has failed. 5033 */ 5034 tsleep(&non_event, PVFS, "ndscls", hz); 5035 return; 5036 } 5037 NFSUNLOCKDS(dsp); 5038 } 5039 5040 /* 5041 * Dereference a layout. 5042 */ 5043 void 5044 nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 5045 { 5046 5047 NFSLOCKCLSTATE(); 5048 if (exclocked != 0) 5049 nfsv4_unlock(&lyp->nfsly_lock, 0); 5050 else 5051 nfsv4_relref(&lyp->nfsly_lock); 5052 NFSUNLOCKCLSTATE(); 5053 } 5054 5055 /* 5056 * Search for a devinfo by deviceid. If one is found, return it after 5057 * acquiring a reference count on it. 5058 */ 5059 struct nfscldevinfo * 5060 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 5061 struct nfscldevinfo *dip) 5062 { 5063 5064 NFSLOCKCLSTATE(); 5065 if (dip == NULL) 5066 dip = nfscl_finddevinfo(clp, deviceid); 5067 if (dip != NULL) 5068 dip->nfsdi_refcnt++; 5069 NFSUNLOCKCLSTATE(); 5070 return (dip); 5071 } 5072 5073 /* 5074 * Dereference a devinfo structure. 5075 */ 5076 static void 5077 nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 5078 { 5079 5080 dip->nfsdi_refcnt--; 5081 if (dip->nfsdi_refcnt == 0) 5082 wakeup(&dip->nfsdi_refcnt); 5083 } 5084 5085 /* 5086 * Dereference a devinfo structure. 5087 */ 5088 void 5089 nfscl_reldevinfo(struct nfscldevinfo *dip) 5090 { 5091 5092 NFSLOCKCLSTATE(); 5093 nfscl_reldevinfo_locked(dip); 5094 NFSUNLOCKCLSTATE(); 5095 } 5096 5097 /* 5098 * Find a layout for this file handle. Return NULL upon failure. 5099 */ 5100 static struct nfscllayout * 5101 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 5102 { 5103 struct nfscllayout *lyp; 5104 5105 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 5106 if (lyp->nfsly_fhlen == fhlen && 5107 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 5108 break; 5109 return (lyp); 5110 } 5111 5112 /* 5113 * Find a devinfo for this deviceid. Return NULL upon failure. 5114 */ 5115 static struct nfscldevinfo * 5116 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 5117 { 5118 struct nfscldevinfo *dip; 5119 5120 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 5121 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 5122 == 0) 5123 break; 5124 return (dip); 5125 } 5126 5127 /* 5128 * Merge the new file layout list into the main one, maintaining it in 5129 * increasing offset order. 5130 */ 5131 static void 5132 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 5133 struct nfsclflayouthead *newfhlp) 5134 { 5135 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 5136 5137 flp = LIST_FIRST(fhlp); 5138 prevflp = NULL; 5139 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 5140 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 5141 prevflp = flp; 5142 flp = LIST_NEXT(flp, nfsfl_list); 5143 } 5144 if (prevflp == NULL) 5145 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 5146 else 5147 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 5148 prevflp = nflp; 5149 } 5150 } 5151 5152 /* 5153 * Add this nfscldevinfo to the client, if it doesn't already exist. 5154 * This function consumes the structure pointed at by dip, if not NULL. 5155 */ 5156 APPLESTATIC int 5157 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind, 5158 struct nfsclflayout *flp) 5159 { 5160 struct nfsclclient *clp; 5161 struct nfscldevinfo *tdip; 5162 uint8_t *dev; 5163 5164 NFSLOCKCLSTATE(); 5165 clp = nmp->nm_clp; 5166 if (clp == NULL) { 5167 NFSUNLOCKCLSTATE(); 5168 if (dip != NULL) 5169 free(dip, M_NFSDEVINFO); 5170 return (ENODEV); 5171 } 5172 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5173 dev = flp->nfsfl_dev; 5174 else 5175 dev = flp->nfsfl_ffm[ind].dev; 5176 tdip = nfscl_finddevinfo(clp, dev); 5177 if (tdip != NULL) { 5178 tdip->nfsdi_layoutrefs++; 5179 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5180 flp->nfsfl_devp = tdip; 5181 else 5182 flp->nfsfl_ffm[ind].devp = tdip; 5183 nfscl_reldevinfo_locked(tdip); 5184 NFSUNLOCKCLSTATE(); 5185 if (dip != NULL) 5186 free(dip, M_NFSDEVINFO); 5187 return (0); 5188 } 5189 if (dip != NULL) { 5190 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5191 dip->nfsdi_layoutrefs = 1; 5192 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5193 flp->nfsfl_devp = dip; 5194 else 5195 flp->nfsfl_ffm[ind].devp = dip; 5196 } 5197 NFSUNLOCKCLSTATE(); 5198 if (dip == NULL) 5199 return (ENODEV); 5200 return (0); 5201 } 5202 5203 /* 5204 * Free up a layout structure and associated file layout structure(s). 5205 */ 5206 APPLESTATIC void 5207 nfscl_freelayout(struct nfscllayout *layp) 5208 { 5209 struct nfsclflayout *flp, *nflp; 5210 struct nfsclrecalllayout *rp, *nrp; 5211 5212 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5213 LIST_REMOVE(flp, nfsfl_list); 5214 nfscl_freeflayout(flp); 5215 } 5216 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5217 LIST_REMOVE(flp, nfsfl_list); 5218 nfscl_freeflayout(flp); 5219 } 5220 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5221 LIST_REMOVE(rp, nfsrecly_list); 5222 free(rp, M_NFSLAYRECALL); 5223 } 5224 nfscl_layoutcnt--; 5225 free(layp, M_NFSLAYOUT); 5226 } 5227 5228 /* 5229 * Free up a file layout structure. 5230 */ 5231 APPLESTATIC void 5232 nfscl_freeflayout(struct nfsclflayout *flp) 5233 { 5234 int i, j; 5235 5236 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) { 5237 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5238 free(flp->nfsfl_fh[i], M_NFSFH); 5239 if (flp->nfsfl_devp != NULL) 5240 flp->nfsfl_devp->nfsdi_layoutrefs--; 5241 } 5242 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0) 5243 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) { 5244 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++) 5245 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH); 5246 if (flp->nfsfl_ffm[i].devp != NULL) 5247 flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--; 5248 } 5249 free(flp, M_NFSFLAYOUT); 5250 } 5251 5252 /* 5253 * Free up a file layout devinfo structure. 5254 */ 5255 APPLESTATIC void 5256 nfscl_freedevinfo(struct nfscldevinfo *dip) 5257 { 5258 5259 free(dip, M_NFSDEVINFO); 5260 } 5261 5262 /* 5263 * Mark any layouts that match as recalled. 5264 */ 5265 static int 5266 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5267 uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op, 5268 char *devid, struct nfsclrecalllayout *recallp) 5269 { 5270 struct nfsclrecalllayout *rp, *orp; 5271 5272 recallp->nfsrecly_recalltype = recalltype; 5273 recallp->nfsrecly_iomode = iomode; 5274 recallp->nfsrecly_stateseqid = stateseqid; 5275 recallp->nfsrecly_off = off; 5276 recallp->nfsrecly_len = len; 5277 recallp->nfsrecly_stat = stat; 5278 recallp->nfsrecly_op = op; 5279 if (devid != NULL) 5280 NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID); 5281 /* 5282 * Order the list as file returns first, followed by fsid and any 5283 * returns, both in increasing stateseqid order. 5284 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5285 * (I'm not sure this is correct because I find RFC5661 confusing 5286 * on this, but hopefully it will work ok.) 5287 */ 5288 orp = NULL; 5289 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5290 orp = rp; 5291 if ((recalltype == NFSLAYOUTRETURN_FILE && 5292 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5293 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5294 (recalltype != NFSLAYOUTRETURN_FILE && 5295 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5296 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5297 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5298 break; 5299 } 5300 5301 /* 5302 * Put any error return on all the file returns that will 5303 * preceed this one. 5304 */ 5305 if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE && 5306 stat != 0 && rp->nfsrecly_stat == 0) { 5307 rp->nfsrecly_stat = stat; 5308 rp->nfsrecly_op = op; 5309 if (devid != NULL) 5310 NFSBCOPY(devid, rp->nfsrecly_devid, 5311 NFSX_V4DEVICEID); 5312 } 5313 } 5314 if (rp == NULL) { 5315 if (orp == NULL) 5316 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5317 nfsrecly_list); 5318 else 5319 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5320 } 5321 lyp->nfsly_flags |= NFSLY_RECALL; 5322 wakeup(lyp->nfsly_clp); 5323 return (0); 5324 } 5325 5326 /* 5327 * Compare the two seqids for ordering. The trick is that the seqids can 5328 * wrap around from 0xffffffff->0, so check for the cases where one 5329 * has wrapped around. 5330 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5331 */ 5332 static int 5333 nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5334 { 5335 5336 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5337 /* seqid2 has wrapped around. */ 5338 return (0); 5339 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5340 /* seqid1 has wrapped around. */ 5341 return (1); 5342 if (seqid1 <= seqid2) 5343 return (1); 5344 return (0); 5345 } 5346 5347 /* 5348 * Do a layout return for each of the recalls. 5349 */ 5350 static void 5351 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5352 struct ucred *cred, NFSPROC_T *p) 5353 { 5354 struct nfsclrecalllayout *rp; 5355 nfsv4stateid_t stateid; 5356 int layouttype; 5357 5358 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5359 stateid.seqid = lyp->nfsly_stateid.seqid; 5360 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5361 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5362 else 5363 layouttype = NFSLAYOUT_FLEXFILE; 5364 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5365 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5366 lyp->nfsly_fhlen, 0, layouttype, 5367 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5368 rp->nfsrecly_off, rp->nfsrecly_len, 5369 &stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op, 5370 rp->nfsrecly_devid); 5371 } 5372 } 5373 5374 /* 5375 * Do the layout commit for a file layout. 5376 */ 5377 static void 5378 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5379 struct ucred *cred, NFSPROC_T *p) 5380 { 5381 struct nfsclflayout *flp; 5382 uint64_t len; 5383 int error, layouttype; 5384 5385 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5386 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5387 else 5388 layouttype = NFSLAYOUT_FLEXFILE; 5389 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5390 if (layouttype == NFSLAYOUT_FLEXFILE && 5391 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) { 5392 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n"); 5393 /* If not supported, don't bother doing it. */ 5394 NFSLOCKMNT(nmp); 5395 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5396 NFSUNLOCKMNT(nmp); 5397 break; 5398 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5399 len = flp->nfsfl_end - flp->nfsfl_off; 5400 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5401 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5402 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5403 layouttype, cred, p, NULL); 5404 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5405 if (error == NFSERR_NOTSUPP) { 5406 /* If not supported, don't bother doing it. */ 5407 NFSLOCKMNT(nmp); 5408 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5409 NFSUNLOCKMNT(nmp); 5410 break; 5411 } 5412 } 5413 } 5414 } 5415 5416 /* 5417 * Commit all layouts for a file (vnode). 5418 */ 5419 int 5420 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5421 { 5422 struct nfsclclient *clp; 5423 struct nfscllayout *lyp; 5424 struct nfsnode *np = VTONFS(vp); 5425 mount_t mp; 5426 struct nfsmount *nmp; 5427 5428 mp = vnode_mount(vp); 5429 nmp = VFSTONFS(mp); 5430 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5431 return (0); 5432 NFSLOCKCLSTATE(); 5433 clp = nmp->nm_clp; 5434 if (clp == NULL) { 5435 NFSUNLOCKCLSTATE(); 5436 return (EPERM); 5437 } 5438 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5439 if (lyp == NULL) { 5440 NFSUNLOCKCLSTATE(); 5441 return (EPERM); 5442 } 5443 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5444 if (NFSCL_FORCEDISM(mp)) { 5445 NFSUNLOCKCLSTATE(); 5446 return (EPERM); 5447 } 5448 tryagain: 5449 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5450 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5451 NFSUNLOCKCLSTATE(); 5452 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5453 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5454 NFSLOCKCLSTATE(); 5455 goto tryagain; 5456 } 5457 nfsv4_relref(&lyp->nfsly_lock); 5458 NFSUNLOCKCLSTATE(); 5459 return (0); 5460 } 5461 5462