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 #include <fs/nfs/nfsport.h> 84 85 /* 86 * Global variables 87 */ 88 extern struct nfsstatsv1 nfsstatsv1; 89 extern struct nfsreqhead nfsd_reqq; 90 extern u_int32_t newnfs_false, newnfs_true; 91 extern int nfscl_debuglevel; 92 extern int nfscl_enablecallb; 93 extern int nfs_numnfscbd; 94 NFSREQSPINLOCK; 95 NFSCLSTATEMUTEX; 96 int nfscl_inited = 0; 97 struct nfsclhead nfsclhead; /* Head of clientid list */ 98 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER; 99 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER; 100 101 static int nfscl_delegcnt = 0; 102 static int nfscl_layoutcnt = 0; 103 static int nfscl_getopen(struct nfsclownerhead *, struct nfsclopenhash *, 104 u_int8_t *, int, u_int8_t *, u_int8_t *, u_int32_t, 105 struct nfscllockowner **, struct nfsclopen **); 106 static bool nfscl_checkown(struct nfsclowner *, struct nfsclopen *, uint8_t *, 107 uint8_t *, struct nfscllockowner **, struct nfsclopen **, 108 struct nfsclopen **); 109 static void nfscl_clrelease(struct nfsclclient *); 110 static void nfscl_cleanclient(struct nfsclclient *); 111 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 112 struct ucred *, NFSPROC_T *); 113 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 114 struct nfsmount *, struct ucred *, NFSPROC_T *); 115 static void nfscl_recover(struct nfsclclient *, bool *, struct ucred *, 116 NFSPROC_T *); 117 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 118 struct nfscllock *, int); 119 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 120 struct nfscllock **, int); 121 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *); 122 static u_int32_t nfscl_nextcbident(void); 123 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **); 124 static struct nfsclclient *nfscl_getclnt(u_int32_t); 125 static struct nfsclclient *nfscl_getclntsess(uint8_t *); 126 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 127 int); 128 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *, 129 int, struct nfsclrecalllayout **); 130 static void nfscl_reldevinfo_locked(struct nfscldevinfo *); 131 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *, 132 int); 133 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *); 134 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 135 u_int8_t *, struct nfscllock **); 136 static void nfscl_freealllocks(struct nfscllockownerhead *, int); 137 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 138 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 139 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 140 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 141 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *); 142 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 143 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 144 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 145 static void nfscl_totalrecall(struct nfsclclient *); 146 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 147 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 148 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 149 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 150 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 151 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 152 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 153 struct ucred *, NFSPROC_T *); 154 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 155 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 156 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *, 157 bool); 158 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t); 159 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 160 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 161 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int, 162 vnode_t *); 163 static void nfscl_freeopenowner(struct nfsclowner *, int); 164 static void nfscl_cleandeleg(struct nfscldeleg *); 165 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 166 struct nfsmount *, NFSPROC_T *); 167 static void nfscl_emptylockowner(struct nfscllockowner *, 168 struct nfscllockownerfhhead *); 169 static void nfscl_mergeflayouts(struct nfsclflayouthead *, 170 struct nfsclflayouthead *); 171 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t, 172 uint64_t, uint32_t, uint32_t, uint32_t, char *, struct nfsclrecalllayout *); 173 static int nfscl_seq(uint32_t, uint32_t); 174 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *, 175 struct ucred *, NFSPROC_T *); 176 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *, 177 struct ucred *, NFSPROC_T *); 178 179 static short nfscberr_null[] = { 180 0, 181 0, 182 }; 183 184 static short nfscberr_getattr[] = { 185 NFSERR_RESOURCE, 186 NFSERR_BADHANDLE, 187 NFSERR_BADXDR, 188 NFSERR_RESOURCE, 189 NFSERR_SERVERFAULT, 190 0, 191 }; 192 193 static short nfscberr_recall[] = { 194 NFSERR_RESOURCE, 195 NFSERR_BADHANDLE, 196 NFSERR_BADSTATEID, 197 NFSERR_BADXDR, 198 NFSERR_RESOURCE, 199 NFSERR_SERVERFAULT, 200 0, 201 }; 202 203 static short *nfscl_cberrmap[] = { 204 nfscberr_null, 205 nfscberr_null, 206 nfscberr_null, 207 nfscberr_getattr, 208 nfscberr_recall 209 }; 210 211 #define NETFAMILY(clp) \ 212 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 213 214 /* 215 * Called for an open operation. 216 * If the nfhp argument is NULL, just get an openowner. 217 */ 218 int 219 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 220 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 221 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 222 { 223 struct nfsclclient *clp; 224 struct nfsclowner *owp, *nowp; 225 struct nfsclopen *op = NULL, *nop = NULL; 226 struct nfscldeleg *dp; 227 struct nfsclownerhead *ohp; 228 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 229 int ret; 230 231 if (newonep != NULL) 232 *newonep = 0; 233 if (opp != NULL) 234 *opp = NULL; 235 if (owpp != NULL) 236 *owpp = NULL; 237 238 /* 239 * Might need one or both of these, so MALLOC them now, to 240 * avoid a tsleep() in MALLOC later. 241 */ 242 nowp = malloc(sizeof (struct nfsclowner), 243 M_NFSCLOWNER, M_WAITOK); 244 if (nfhp != NULL) { 245 nop = malloc(sizeof (struct nfsclopen) + 246 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 247 nop->nfso_hash.le_prev = NULL; 248 } 249 ret = nfscl_getcl(vp->v_mount, cred, p, false, &clp); 250 if (ret != 0) { 251 free(nowp, M_NFSCLOWNER); 252 if (nop != NULL) 253 free(nop, M_NFSCLOPEN); 254 return (ret); 255 } 256 257 /* 258 * Get the Open iff it already exists. 259 * If none found, add the new one or return error, depending upon 260 * "create". 261 */ 262 NFSLOCKCLSTATE(); 263 dp = NULL; 264 /* First check the delegation list */ 265 if (nfhp != NULL && usedeleg) { 266 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 267 if (dp->nfsdl_fhlen == fhlen && 268 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 269 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 270 (dp->nfsdl_flags & NFSCLDL_WRITE)) 271 break; 272 dp = NULL; 273 break; 274 } 275 } 276 } 277 278 /* For NFSv4.1/4.2 and this option, use a single open_owner. */ 279 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) 280 nfscl_filllockowner(NULL, own, F_POSIX); 281 else 282 nfscl_filllockowner(p->td_proc, own, F_POSIX); 283 if (dp != NULL) 284 ohp = &dp->nfsdl_owner; 285 else 286 ohp = &clp->nfsc_owner; 287 /* Now, search for an openowner */ 288 LIST_FOREACH(owp, ohp, nfsow_list) { 289 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 290 break; 291 } 292 293 /* 294 * Create a new open, as required. 295 */ 296 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 297 cred, newonep); 298 299 /* 300 * Now, check the mode on the open and return the appropriate 301 * value. 302 */ 303 if (retp != NULL) { 304 if (nfhp != NULL && dp != NULL && nop == NULL) 305 /* new local open on delegation */ 306 *retp = NFSCLOPEN_SETCRED; 307 else 308 *retp = NFSCLOPEN_OK; 309 } 310 if (op != NULL && (amode & ~(op->nfso_mode))) { 311 op->nfso_mode |= amode; 312 if (retp != NULL && dp == NULL) 313 *retp = NFSCLOPEN_DOOPEN; 314 } 315 316 /* 317 * Serialize modifications to the open owner for multiple threads 318 * within the same process using a read/write sleep lock. 319 * For NFSv4.1 and a single OpenOwner, allow concurrent open operations 320 * by acquiring a shared lock. The close operations still use an 321 * exclusive lock for this case. 322 */ 323 if (lockit != 0) { 324 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) { 325 /* 326 * Get a shared lock on the OpenOwner, but first 327 * wait for any pending exclusive lock, so that the 328 * exclusive locker gets priority. 329 */ 330 nfsv4_lock(&owp->nfsow_rwlock, 0, NULL, 331 NFSCLSTATEMUTEXPTR, NULL); 332 nfsv4_getref(&owp->nfsow_rwlock, NULL, 333 NFSCLSTATEMUTEXPTR, NULL); 334 } else 335 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 336 } 337 NFSUNLOCKCLSTATE(); 338 if (nowp != NULL) 339 free(nowp, M_NFSCLOWNER); 340 if (nop != NULL) 341 free(nop, M_NFSCLOPEN); 342 if (owpp != NULL) 343 *owpp = owp; 344 if (opp != NULL) 345 *opp = op; 346 return (0); 347 } 348 349 /* 350 * Create a new open, as required. 351 */ 352 static void 353 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 354 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 355 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 356 struct ucred *cred, int *newonep) 357 { 358 struct nfsclowner *owp = *owpp, *nowp; 359 struct nfsclopen *op, *nop; 360 361 if (nowpp != NULL) 362 nowp = *nowpp; 363 else 364 nowp = NULL; 365 if (nopp != NULL) 366 nop = *nopp; 367 else 368 nop = NULL; 369 if (owp == NULL && nowp != NULL) { 370 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 371 LIST_INIT(&nowp->nfsow_open); 372 nowp->nfsow_clp = clp; 373 nowp->nfsow_seqid = 0; 374 nowp->nfsow_defunct = 0; 375 nfscl_lockinit(&nowp->nfsow_rwlock); 376 if (dp != NULL) { 377 nfsstatsv1.cllocalopenowners++; 378 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 379 } else { 380 nfsstatsv1.clopenowners++; 381 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 382 } 383 owp = *owpp = nowp; 384 *nowpp = NULL; 385 if (newonep != NULL) 386 *newonep = 1; 387 } 388 389 /* If an fhp has been specified, create an Open as well. */ 390 if (fhp != NULL) { 391 /* and look for the correct open, based upon FH */ 392 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 393 if (op->nfso_fhlen == fhlen && 394 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 395 break; 396 } 397 if (op == NULL && nop != NULL) { 398 nop->nfso_own = owp; 399 nop->nfso_mode = 0; 400 nop->nfso_opencnt = 0; 401 nop->nfso_posixlock = 1; 402 nop->nfso_fhlen = fhlen; 403 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 404 LIST_INIT(&nop->nfso_lock); 405 nop->nfso_stateid.seqid = 0; 406 nop->nfso_stateid.other[0] = 0; 407 nop->nfso_stateid.other[1] = 0; 408 nop->nfso_stateid.other[2] = 0; 409 KASSERT(cred != NULL, ("%s: cred NULL\n", __func__)); 410 newnfs_copyincred(cred, &nop->nfso_cred); 411 if (dp != NULL) { 412 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 413 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 414 nfsdl_list); 415 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 416 nfsstatsv1.cllocalopens++; 417 } else { 418 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, fhp, fhlen), 419 nop, nfso_hash); 420 nfsstatsv1.clopens++; 421 } 422 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 423 *opp = nop; 424 *nopp = NULL; 425 if (newonep != NULL) 426 *newonep = 1; 427 } else { 428 *opp = op; 429 } 430 } 431 } 432 433 /* 434 * Called to find/add a delegation to a client. 435 */ 436 int 437 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 438 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 439 { 440 struct nfscldeleg *dp = *dpp, *tdp; 441 struct nfsmount *nmp; 442 443 KASSERT(mp != NULL, ("nfscl_deleg: mp NULL")); 444 nmp = VFSTONFS(mp); 445 /* 446 * First, if we have received a Read delegation for a file on a 447 * read/write file system, just return it, because they aren't 448 * useful, imho. 449 */ 450 if (dp != NULL && !NFSMNT_RDONLY(mp) && 451 (dp->nfsdl_flags & NFSCLDL_READ)) { 452 nfscl_trydelegreturn(dp, cred, nmp, p); 453 free(dp, M_NFSCLDELEG); 454 *dpp = NULL; 455 return (0); 456 } 457 458 /* 459 * Since a delegation might be added to the mount, 460 * set NFSMNTP_DELEGISSUED now. If a delegation already 461 * exagain ists, setting this flag is harmless. 462 */ 463 NFSLOCKMNT(nmp); 464 nmp->nm_privflag |= NFSMNTP_DELEGISSUED; 465 NFSUNLOCKMNT(nmp); 466 467 /* Look for the correct deleg, based upon FH */ 468 NFSLOCKCLSTATE(); 469 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 470 if (tdp == NULL) { 471 if (dp == NULL) { 472 NFSUNLOCKCLSTATE(); 473 return (NFSERR_BADSTATEID); 474 } 475 *dpp = NULL; 476 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 477 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 478 nfsdl_hash); 479 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 480 nfsstatsv1.cldelegates++; 481 nfscl_delegcnt++; 482 } else { 483 /* 484 * Delegation already exists, what do we do if a new one?? 485 */ 486 if (dp != NULL) { 487 printf("Deleg already exists!\n"); 488 free(dp, M_NFSCLDELEG); 489 *dpp = NULL; 490 } else { 491 *dpp = tdp; 492 } 493 } 494 NFSUNLOCKCLSTATE(); 495 return (0); 496 } 497 498 /* 499 * Find a delegation for this file handle. Return NULL upon failure. 500 */ 501 static struct nfscldeleg * 502 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 503 { 504 struct nfscldeleg *dp; 505 506 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 507 if (dp->nfsdl_fhlen == fhlen && 508 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 509 break; 510 } 511 return (dp); 512 } 513 514 /* 515 * Get a stateid for an I/O operation. First, look for an open and iff 516 * found, return either a lockowner stateid or the open stateid. 517 * If no Open is found, just return error and the special stateid of all zeros. 518 */ 519 int 520 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 521 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 522 void **lckpp) 523 { 524 struct nfsclclient *clp; 525 struct nfsclopen *op = NULL, *top; 526 struct nfsclopenhash *oph; 527 struct nfscllockowner *lp; 528 struct nfscldeleg *dp; 529 struct nfsnode *np; 530 struct nfsmount *nmp; 531 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 532 int error; 533 bool done; 534 535 *lckpp = NULL; 536 /* 537 * Initially, just set the special stateid of all zeros. 538 * (Don't do this for a DS, since the special stateid can't be used.) 539 */ 540 if (fords == 0) { 541 stateidp->seqid = 0; 542 stateidp->other[0] = 0; 543 stateidp->other[1] = 0; 544 stateidp->other[2] = 0; 545 } 546 if (vnode_vtype(vp) != VREG) 547 return (EISDIR); 548 np = VTONFS(vp); 549 nmp = VFSTONFS(vp->v_mount); 550 NFSLOCKCLSTATE(); 551 clp = nfscl_findcl(nmp); 552 if (clp == NULL) { 553 NFSUNLOCKCLSTATE(); 554 return (EACCES); 555 } 556 557 /* 558 * Wait for recovery to complete. 559 */ 560 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 561 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 562 PZERO, "nfsrecvr", NULL); 563 564 /* 565 * First, look for a delegation. 566 */ 567 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 568 if (dp->nfsdl_fhlen == fhlen && 569 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 570 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 571 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 572 stateidp->seqid = dp->nfsdl_stateid.seqid; 573 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 574 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 575 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 576 if (!(np->n_flag & NDELEGRECALL)) { 577 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 578 nfsdl_list); 579 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 580 nfsdl_list); 581 dp->nfsdl_timestamp = NFSD_MONOSEC + 582 120; 583 dp->nfsdl_rwlock.nfslock_usecnt++; 584 *lckpp = (void *)&dp->nfsdl_rwlock; 585 } 586 NFSUNLOCKCLSTATE(); 587 return (0); 588 } 589 break; 590 } 591 } 592 593 if (p != NULL) { 594 /* 595 * If p != NULL, we want to search the parentage tree 596 * for a matching OpenOwner and use that. 597 */ 598 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) 599 nfscl_filllockowner(NULL, own, F_POSIX); 600 else 601 nfscl_filllockowner(p->td_proc, own, F_POSIX); 602 lp = NULL; 603 error = nfscl_getopen(NULL, clp->nfsc_openhash, nfhp, fhlen, 604 own, own, mode, &lp, &op); 605 if (error == 0 && lp != NULL && fords == 0) { 606 /* Don't return a lock stateid for a DS. */ 607 stateidp->seqid = 608 lp->nfsl_stateid.seqid; 609 stateidp->other[0] = 610 lp->nfsl_stateid.other[0]; 611 stateidp->other[1] = 612 lp->nfsl_stateid.other[1]; 613 stateidp->other[2] = 614 lp->nfsl_stateid.other[2]; 615 NFSUNLOCKCLSTATE(); 616 return (0); 617 } 618 } 619 if (op == NULL) { 620 /* If not found, just look for any OpenOwner that will work. */ 621 top = NULL; 622 done = false; 623 oph = NFSCLOPENHASH(clp, nfhp, fhlen); 624 LIST_FOREACH(op, oph, nfso_hash) { 625 if (op->nfso_fhlen == fhlen && 626 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) { 627 if (top == NULL && (op->nfso_mode & 628 NFSV4OPEN_ACCESSWRITE) != 0 && 629 (mode & NFSV4OPEN_ACCESSREAD) != 0) 630 top = op; 631 if ((mode & op->nfso_mode) == mode) { 632 /* LRU order the hash list. */ 633 LIST_REMOVE(op, nfso_hash); 634 LIST_INSERT_HEAD(oph, op, nfso_hash); 635 done = true; 636 break; 637 } 638 } 639 } 640 if (!done) { 641 NFSCL_DEBUG(2, "openmode top=%p\n", top); 642 if (top == NULL || NFSHASOPENMODE(nmp)) { 643 NFSUNLOCKCLSTATE(); 644 return (ENOENT); 645 } else 646 op = top; 647 } 648 /* 649 * For read aheads or write behinds, use the open cred. 650 * A read ahead or write behind is indicated by p == NULL. 651 */ 652 if (p == NULL) 653 newnfs_copycred(&op->nfso_cred, cred); 654 } 655 656 /* 657 * No lock stateid, so return the open stateid. 658 */ 659 stateidp->seqid = op->nfso_stateid.seqid; 660 stateidp->other[0] = op->nfso_stateid.other[0]; 661 stateidp->other[1] = op->nfso_stateid.other[1]; 662 stateidp->other[2] = op->nfso_stateid.other[2]; 663 NFSUNLOCKCLSTATE(); 664 return (0); 665 } 666 667 /* 668 * Search for a matching file, mode and, optionally, lockowner. 669 */ 670 static int 671 nfscl_getopen(struct nfsclownerhead *ohp, struct nfsclopenhash *ohashp, 672 u_int8_t *nfhp, int fhlen, u_int8_t *openown, u_int8_t *lockown, 673 u_int32_t mode, struct nfscllockowner **lpp, struct nfsclopen **opp) 674 { 675 struct nfsclowner *owp; 676 struct nfsclopen *op, *rop, *rop2; 677 struct nfsclopenhash *oph; 678 bool keep_looping; 679 680 KASSERT(ohp == NULL || ohashp == NULL, ("nfscl_getopen: " 681 "only one of ohp and ohashp can be set")); 682 if (lpp != NULL) 683 *lpp = NULL; 684 /* 685 * rop will be set to the open to be returned. There are three 686 * variants of this, all for an open of the correct file: 687 * 1 - A match of lockown. 688 * 2 - A match of the openown, when no lockown match exists. 689 * 3 - A match for any open, if no openown or lockown match exists. 690 * Looking for #2 over #3 probably isn't necessary, but since 691 * RFC3530 is vague w.r.t. the relationship between openowners and 692 * lockowners, I think this is the safer way to go. 693 */ 694 rop = NULL; 695 rop2 = NULL; 696 keep_looping = true; 697 /* Search the client list */ 698 if (ohashp == NULL) { 699 /* Search the local opens on the delegation. */ 700 LIST_FOREACH(owp, ohp, nfsow_list) { 701 /* and look for the correct open */ 702 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 703 if (op->nfso_fhlen == fhlen && 704 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 705 && (op->nfso_mode & mode) == mode) 706 keep_looping = nfscl_checkown(owp, op, openown, 707 lockown, lpp, &rop, &rop2); 708 if (!keep_looping) 709 break; 710 } 711 if (!keep_looping) 712 break; 713 } 714 } else { 715 /* Search for matching opens on the hash list. */ 716 oph = &ohashp[NFSCLOPENHASHFUNC(nfhp, fhlen)]; 717 LIST_FOREACH(op, oph, nfso_hash) { 718 if (op->nfso_fhlen == fhlen && 719 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 720 && (op->nfso_mode & mode) == mode) 721 keep_looping = nfscl_checkown(op->nfso_own, op, 722 openown, lockown, lpp, &rop, &rop2); 723 if (!keep_looping) { 724 /* LRU order the hash list. */ 725 LIST_REMOVE(op, nfso_hash); 726 LIST_INSERT_HEAD(oph, op, nfso_hash); 727 break; 728 } 729 } 730 } 731 if (rop == NULL) 732 rop = rop2; 733 if (rop == NULL) 734 return (EBADF); 735 *opp = rop; 736 return (0); 737 } 738 739 /* Check for an owner match. */ 740 static bool 741 nfscl_checkown(struct nfsclowner *owp, struct nfsclopen *op, uint8_t *openown, 742 uint8_t *lockown, struct nfscllockowner **lpp, struct nfsclopen **ropp, 743 struct nfsclopen **ropp2) 744 { 745 struct nfscllockowner *lp; 746 bool keep_looping; 747 748 keep_looping = true; 749 if (lpp != NULL) { 750 /* Now look for a matching lockowner. */ 751 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 752 if (!NFSBCMP(lp->nfsl_owner, lockown, 753 NFSV4CL_LOCKNAMELEN)) { 754 *lpp = lp; 755 *ropp = op; 756 return (false); 757 } 758 } 759 } 760 if (*ropp == NULL && !NFSBCMP(owp->nfsow_owner, openown, 761 NFSV4CL_LOCKNAMELEN)) { 762 *ropp = op; 763 if (lpp == NULL) 764 keep_looping = false; 765 } 766 if (*ropp2 == NULL) 767 *ropp2 = op; 768 return (keep_looping); 769 } 770 771 /* 772 * Release use of an open owner. Called when open operations are done 773 * with the open owner. 774 */ 775 void 776 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp, 777 __unused int error, __unused int candelete, int unlocked) 778 { 779 780 if (owp == NULL) 781 return; 782 NFSLOCKCLSTATE(); 783 if (unlocked == 0) { 784 if (NFSHASONEOPENOWN(nmp)) 785 nfsv4_relref(&owp->nfsow_rwlock); 786 else 787 nfscl_lockunlock(&owp->nfsow_rwlock); 788 } 789 nfscl_clrelease(owp->nfsow_clp); 790 NFSUNLOCKCLSTATE(); 791 } 792 793 /* 794 * Release use of an open structure under an open owner. 795 */ 796 void 797 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error, 798 int candelete) 799 { 800 struct nfsclclient *clp; 801 struct nfsclowner *owp; 802 803 if (op == NULL) 804 return; 805 NFSLOCKCLSTATE(); 806 owp = op->nfso_own; 807 if (NFSHASONEOPENOWN(nmp)) 808 nfsv4_relref(&owp->nfsow_rwlock); 809 else 810 nfscl_lockunlock(&owp->nfsow_rwlock); 811 clp = owp->nfsow_clp; 812 if (error && candelete && op->nfso_opencnt == 0) 813 nfscl_freeopen(op, 0); 814 nfscl_clrelease(clp); 815 NFSUNLOCKCLSTATE(); 816 } 817 818 /* 819 * Called to get a clientid structure. It will optionally lock the 820 * client data structures to do the SetClientId/SetClientId_confirm, 821 * but will release that lock and return the clientid with a reference 822 * count on it. 823 * If the "cred" argument is NULL, a new clientid should not be created. 824 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 825 * be done. 826 * It always clpp with a reference count on it, unless returning an error. 827 */ 828 int 829 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p, 830 bool tryminvers, struct nfsclclient **clpp) 831 { 832 struct nfsclclient *clp; 833 struct nfsclclient *newclp = NULL; 834 struct nfsmount *nmp; 835 char uuid[HOSTUUIDLEN]; 836 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 837 u_int16_t idlen = 0; 838 839 nmp = VFSTONFS(mp); 840 if (cred != NULL) { 841 getcredhostuuid(cred, uuid, sizeof uuid); 842 idlen = strlen(uuid); 843 if (idlen > 0) 844 idlen += sizeof (u_int64_t); 845 else 846 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 847 newclp = malloc( 848 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 849 M_WAITOK | M_ZERO); 850 } 851 NFSLOCKCLSTATE(); 852 /* 853 * If a forced dismount is already in progress, don't 854 * allocate a new clientid and get out now. For the case where 855 * clp != NULL, this is a harmless optimization. 856 */ 857 if (NFSCL_FORCEDISM(mp)) { 858 NFSUNLOCKCLSTATE(); 859 if (newclp != NULL) 860 free(newclp, M_NFSCLCLIENT); 861 return (EBADF); 862 } 863 clp = nmp->nm_clp; 864 if (clp == NULL) { 865 if (newclp == NULL) { 866 NFSUNLOCKCLSTATE(); 867 return (EACCES); 868 } 869 clp = newclp; 870 clp->nfsc_idlen = idlen; 871 LIST_INIT(&clp->nfsc_owner); 872 TAILQ_INIT(&clp->nfsc_deleg); 873 TAILQ_INIT(&clp->nfsc_layout); 874 LIST_INIT(&clp->nfsc_devinfo); 875 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 876 LIST_INIT(&clp->nfsc_deleghash[i]); 877 for (i = 0; i < NFSCLOPENHASHSIZE; i++) 878 LIST_INIT(&clp->nfsc_openhash[i]); 879 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 880 LIST_INIT(&clp->nfsc_layouthash[i]); 881 clp->nfsc_flags = NFSCLFLAGS_INITED; 882 clp->nfsc_clientidrev = 1; 883 clp->nfsc_cbident = nfscl_nextcbident(); 884 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 885 clp->nfsc_idlen); 886 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 887 nmp->nm_clp = clp; 888 clp->nfsc_nmp = nmp; 889 } else { 890 if (newclp != NULL) 891 free(newclp, M_NFSCLCLIENT); 892 } 893 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 894 !NFSCL_FORCEDISM(mp)) 895 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 896 NFSCLSTATEMUTEXPTR, mp); 897 if (igotlock == 0) { 898 /* 899 * Call nfsv4_lock() with "iwantlock == 0" so that it will 900 * wait for a pending exclusive lock request. This gives the 901 * exclusive lock request priority over this shared lock 902 * request. 903 * An exclusive lock on nfsc_lock is used mainly for server 904 * crash recoveries. 905 */ 906 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp); 907 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 908 } 909 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) { 910 /* 911 * Both nfsv4_lock() and nfsv4_getref() know to check 912 * for NFSCL_FORCEDISM() and return without sleeping to 913 * wait for the exclusive lock to be released, since it 914 * might be held by nfscl_umount() and we need to get out 915 * now for that case and not wait until nfscl_umount() 916 * releases it. 917 */ 918 NFSUNLOCKCLSTATE(); 919 return (EBADF); 920 } 921 NFSUNLOCKCLSTATE(); 922 923 /* 924 * If it needs a clientid, do the setclientid now. 925 */ 926 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 927 if (!igotlock) 928 panic("nfscl_clget"); 929 if (p == NULL || cred == NULL) { 930 NFSLOCKCLSTATE(); 931 nfsv4_unlock(&clp->nfsc_lock, 0); 932 NFSUNLOCKCLSTATE(); 933 return (EACCES); 934 } 935 /* 936 * If RFC3530 Sec. 14.2.33 is taken literally, 937 * NFSERR_CLIDINUSE will be returned persistently for the 938 * case where a new mount of the same file system is using 939 * a different principal. In practice, NFSERR_CLIDINUSE is 940 * only returned when there is outstanding unexpired state 941 * on the clientid. As such, try for twice the lease 942 * interval, if we know what that is. Otherwise, make a 943 * wild ass guess. 944 * The case of returning NFSERR_STALECLIENTID is far less 945 * likely, but might occur if there is a significant delay 946 * between doing the SetClientID and SetClientIDConfirm Ops, 947 * such that the server throws away the clientid before 948 * receiving the SetClientIDConfirm. 949 */ 950 if (clp->nfsc_renew > 0) 951 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 952 else 953 clidinusedelay = 120; 954 trystalecnt = 3; 955 do { 956 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p); 957 if (error == NFSERR_STALECLIENTID || 958 error == NFSERR_STALEDONTRECOVER || 959 error == NFSERR_BADSESSION || 960 error == NFSERR_CLIDINUSE) { 961 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 962 } 963 } while (((error == NFSERR_STALECLIENTID || 964 error == NFSERR_BADSESSION || 965 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 966 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 967 if (error) { 968 NFSLOCKCLSTATE(); 969 nfsv4_unlock(&clp->nfsc_lock, 0); 970 NFSUNLOCKCLSTATE(); 971 return (error); 972 } 973 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 974 } 975 if (igotlock) { 976 NFSLOCKCLSTATE(); 977 nfsv4_unlock(&clp->nfsc_lock, 1); 978 NFSUNLOCKCLSTATE(); 979 } 980 981 *clpp = clp; 982 return (0); 983 } 984 985 /* 986 * Get a reference to a clientid and return it, if valid. 987 */ 988 struct nfsclclient * 989 nfscl_findcl(struct nfsmount *nmp) 990 { 991 struct nfsclclient *clp; 992 993 clp = nmp->nm_clp; 994 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 995 return (NULL); 996 return (clp); 997 } 998 999 /* 1000 * Release the clientid structure. It may be locked or reference counted. 1001 */ 1002 static void 1003 nfscl_clrelease(struct nfsclclient *clp) 1004 { 1005 1006 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 1007 nfsv4_unlock(&clp->nfsc_lock, 0); 1008 else 1009 nfsv4_relref(&clp->nfsc_lock); 1010 } 1011 1012 /* 1013 * External call for nfscl_clrelease. 1014 */ 1015 void 1016 nfscl_clientrelease(struct nfsclclient *clp) 1017 { 1018 1019 NFSLOCKCLSTATE(); 1020 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 1021 nfsv4_unlock(&clp->nfsc_lock, 0); 1022 else 1023 nfsv4_relref(&clp->nfsc_lock); 1024 NFSUNLOCKCLSTATE(); 1025 } 1026 1027 /* 1028 * Called when wanting to lock a byte region. 1029 */ 1030 int 1031 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1032 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 1033 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 1034 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 1035 { 1036 struct nfscllockowner *lp; 1037 struct nfsclopen *op; 1038 struct nfsclclient *clp; 1039 struct nfscllockowner *nlp; 1040 struct nfscllock *nlop, *otherlop; 1041 struct nfscldeleg *dp = NULL, *ldp = NULL; 1042 struct nfscllockownerhead *lhp = NULL; 1043 struct nfsnode *np; 1044 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 1045 u_int8_t *openownp; 1046 int error = 0, ret, donelocally = 0; 1047 u_int32_t mode; 1048 1049 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 1050 mode = 0; 1051 np = VTONFS(vp); 1052 *lpp = NULL; 1053 lp = NULL; 1054 *newonep = 0; 1055 *donelocallyp = 0; 1056 1057 /* 1058 * Might need these, so MALLOC them now, to 1059 * avoid a tsleep() in MALLOC later. 1060 */ 1061 nlp = malloc( 1062 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 1063 otherlop = malloc( 1064 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1065 nlop = malloc( 1066 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1067 nlop->nfslo_type = type; 1068 nlop->nfslo_first = off; 1069 if (len == NFS64BITSSET) { 1070 nlop->nfslo_end = NFS64BITSSET; 1071 } else { 1072 nlop->nfslo_end = off + len; 1073 if (nlop->nfslo_end <= nlop->nfslo_first) 1074 error = NFSERR_INVAL; 1075 } 1076 1077 if (!error) { 1078 if (recovery) 1079 clp = rclp; 1080 else 1081 error = nfscl_getcl(vp->v_mount, cred, p, false, &clp); 1082 } 1083 if (error) { 1084 free(nlp, M_NFSCLLOCKOWNER); 1085 free(otherlop, M_NFSCLLOCK); 1086 free(nlop, M_NFSCLLOCK); 1087 return (error); 1088 } 1089 1090 op = NULL; 1091 if (recovery) { 1092 ownp = rownp; 1093 openownp = ropenownp; 1094 } else { 1095 nfscl_filllockowner(id, own, flags); 1096 ownp = own; 1097 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) 1098 nfscl_filllockowner(NULL, openown, F_POSIX); 1099 else 1100 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 1101 openownp = openown; 1102 } 1103 if (!recovery) { 1104 NFSLOCKCLSTATE(); 1105 /* 1106 * First, search for a delegation. If one exists for this file, 1107 * the lock can be done locally against it, so long as there 1108 * isn't a local lock conflict. 1109 */ 1110 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1111 np->n_fhp->nfh_len); 1112 /* Just sanity check for correct type of delegation */ 1113 if (dp != NULL && ((dp->nfsdl_flags & 1114 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 1115 (type == F_WRLCK && 1116 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 1117 dp = NULL; 1118 } 1119 if (dp != NULL) { 1120 /* Now, find an open and maybe a lockowner. */ 1121 ret = nfscl_getopen(&dp->nfsdl_owner, NULL, np->n_fhp->nfh_fh, 1122 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 1123 if (ret) 1124 ret = nfscl_getopen(NULL, clp->nfsc_openhash, 1125 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1126 ownp, mode, NULL, &op); 1127 if (!ret) { 1128 lhp = &dp->nfsdl_lock; 1129 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 1130 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 1131 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 1132 donelocally = 1; 1133 } else { 1134 dp = NULL; 1135 } 1136 } 1137 if (!donelocally) { 1138 /* 1139 * Get the related Open and maybe lockowner. 1140 */ 1141 error = nfscl_getopen(NULL, clp->nfsc_openhash, 1142 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1143 ownp, mode, &lp, &op); 1144 if (!error) 1145 lhp = &op->nfso_lock; 1146 } 1147 if (!error && !recovery) 1148 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1149 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1150 if (error) { 1151 if (!recovery) { 1152 nfscl_clrelease(clp); 1153 NFSUNLOCKCLSTATE(); 1154 } 1155 free(nlp, M_NFSCLLOCKOWNER); 1156 free(otherlop, M_NFSCLLOCK); 1157 free(nlop, M_NFSCLLOCK); 1158 return (error); 1159 } 1160 1161 /* 1162 * Ok, see if a lockowner exists and create one, as required. 1163 */ 1164 if (lp == NULL) 1165 LIST_FOREACH(lp, lhp, nfsl_list) { 1166 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1167 break; 1168 } 1169 if (lp == NULL) { 1170 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1171 if (recovery) 1172 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1173 NFSV4CL_LOCKNAMELEN); 1174 else 1175 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1176 NFSV4CL_LOCKNAMELEN); 1177 nlp->nfsl_seqid = 0; 1178 nlp->nfsl_lockflags = flags; 1179 nlp->nfsl_inprog = NULL; 1180 nfscl_lockinit(&nlp->nfsl_rwlock); 1181 LIST_INIT(&nlp->nfsl_lock); 1182 if (donelocally) { 1183 nlp->nfsl_open = NULL; 1184 nfsstatsv1.cllocallockowners++; 1185 } else { 1186 nlp->nfsl_open = op; 1187 nfsstatsv1.cllockowners++; 1188 } 1189 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1190 lp = nlp; 1191 nlp = NULL; 1192 *newonep = 1; 1193 } 1194 1195 /* 1196 * Now, update the byte ranges for locks. 1197 */ 1198 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1199 if (!ret) 1200 donelocally = 1; 1201 if (donelocally) { 1202 *donelocallyp = 1; 1203 if (!recovery) 1204 nfscl_clrelease(clp); 1205 } else { 1206 /* 1207 * Serial modifications on the lock owner for multiple threads 1208 * for the same process using a read/write lock. 1209 */ 1210 if (!recovery) 1211 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1212 } 1213 if (!recovery) 1214 NFSUNLOCKCLSTATE(); 1215 1216 if (nlp) 1217 free(nlp, M_NFSCLLOCKOWNER); 1218 if (nlop) 1219 free(nlop, M_NFSCLLOCK); 1220 if (otherlop) 1221 free(otherlop, M_NFSCLLOCK); 1222 1223 *lpp = lp; 1224 return (0); 1225 } 1226 1227 /* 1228 * Called to unlock a byte range, for LockU. 1229 */ 1230 int 1231 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1232 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1233 struct nfsclclient *clp, void *id, int flags, 1234 struct nfscllockowner **lpp, int *dorpcp) 1235 { 1236 struct nfscllockowner *lp; 1237 struct nfsclopen *op; 1238 struct nfscllock *nlop, *other_lop = NULL; 1239 struct nfscldeleg *dp; 1240 struct nfsnode *np; 1241 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1242 int ret = 0, fnd; 1243 1244 np = VTONFS(vp); 1245 *lpp = NULL; 1246 *dorpcp = 0; 1247 1248 /* 1249 * Might need these, so MALLOC them now, to 1250 * avoid a tsleep() in MALLOC later. 1251 */ 1252 nlop = malloc( 1253 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1254 nlop->nfslo_type = F_UNLCK; 1255 nlop->nfslo_first = off; 1256 if (len == NFS64BITSSET) { 1257 nlop->nfslo_end = NFS64BITSSET; 1258 } else { 1259 nlop->nfslo_end = off + len; 1260 if (nlop->nfslo_end <= nlop->nfslo_first) { 1261 free(nlop, M_NFSCLLOCK); 1262 return (NFSERR_INVAL); 1263 } 1264 } 1265 if (callcnt == 0) { 1266 other_lop = malloc( 1267 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1268 *other_lop = *nlop; 1269 } 1270 nfscl_filllockowner(id, own, flags); 1271 dp = NULL; 1272 NFSLOCKCLSTATE(); 1273 if (callcnt == 0) 1274 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1275 np->n_fhp->nfh_len); 1276 1277 /* 1278 * First, unlock any local regions on a delegation. 1279 */ 1280 if (dp != NULL) { 1281 /* Look for this lockowner. */ 1282 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1283 if (!NFSBCMP(lp->nfsl_owner, own, 1284 NFSV4CL_LOCKNAMELEN)) 1285 break; 1286 } 1287 if (lp != NULL) 1288 /* Use other_lop, so nlop is still available */ 1289 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1290 } 1291 1292 /* 1293 * Now, find a matching open/lockowner that hasn't already been done, 1294 * as marked by nfsl_inprog. 1295 */ 1296 lp = NULL; 1297 fnd = 0; 1298 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh, 1299 np->n_fhp->nfh_len), nfso_hash) { 1300 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1301 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1302 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1303 if (lp->nfsl_inprog == NULL && 1304 !NFSBCMP(lp->nfsl_owner, own, 1305 NFSV4CL_LOCKNAMELEN)) { 1306 fnd = 1; 1307 break; 1308 } 1309 } 1310 } 1311 if (fnd) 1312 break; 1313 } 1314 1315 if (lp != NULL) { 1316 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1317 if (ret) 1318 *dorpcp = 1; 1319 /* 1320 * Serial modifications on the lock owner for multiple 1321 * threads for the same process using a read/write lock. 1322 */ 1323 lp->nfsl_inprog = p; 1324 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1325 *lpp = lp; 1326 } 1327 NFSUNLOCKCLSTATE(); 1328 if (nlop) 1329 free(nlop, M_NFSCLLOCK); 1330 if (other_lop) 1331 free(other_lop, M_NFSCLLOCK); 1332 return (0); 1333 } 1334 1335 /* 1336 * Release all lockowners marked in progess for this process and file. 1337 */ 1338 void 1339 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1340 void *id, int flags) 1341 { 1342 struct nfsclopen *op; 1343 struct nfscllockowner *lp; 1344 struct nfsnode *np; 1345 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1346 1347 np = VTONFS(vp); 1348 nfscl_filllockowner(id, own, flags); 1349 NFSLOCKCLSTATE(); 1350 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh, 1351 np->n_fhp->nfh_len), nfso_hash) { 1352 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1353 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1354 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1355 if (lp->nfsl_inprog == p && 1356 !NFSBCMP(lp->nfsl_owner, own, 1357 NFSV4CL_LOCKNAMELEN)) { 1358 lp->nfsl_inprog = NULL; 1359 nfscl_lockunlock(&lp->nfsl_rwlock); 1360 } 1361 } 1362 } 1363 } 1364 nfscl_clrelease(clp); 1365 NFSUNLOCKCLSTATE(); 1366 } 1367 1368 /* 1369 * Called to find out if any bytes within the byte range specified are 1370 * write locked by the calling process. Used to determine if flushing 1371 * is required before a LockU. 1372 * If in doubt, return 1, so the flush will occur. 1373 */ 1374 int 1375 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1376 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1377 { 1378 struct nfscllockowner *lp; 1379 struct nfsclopen *op; 1380 struct nfsclclient *clp; 1381 struct nfscllock *lop; 1382 struct nfscldeleg *dp; 1383 struct nfsnode *np; 1384 u_int64_t off, end; 1385 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1386 int error = 0; 1387 1388 np = VTONFS(vp); 1389 switch (fl->l_whence) { 1390 case SEEK_SET: 1391 case SEEK_CUR: 1392 /* 1393 * Caller is responsible for adding any necessary offset 1394 * when SEEK_CUR is used. 1395 */ 1396 off = fl->l_start; 1397 break; 1398 case SEEK_END: 1399 off = np->n_size + fl->l_start; 1400 break; 1401 default: 1402 return (1); 1403 } 1404 if (fl->l_len != 0) { 1405 end = off + fl->l_len; 1406 if (end < off) 1407 return (1); 1408 } else { 1409 end = NFS64BITSSET; 1410 } 1411 1412 error = nfscl_getcl(vp->v_mount, cred, p, false, &clp); 1413 if (error) 1414 return (1); 1415 nfscl_filllockowner(id, own, flags); 1416 NFSLOCKCLSTATE(); 1417 1418 /* 1419 * First check the delegation locks. 1420 */ 1421 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1422 if (dp != NULL) { 1423 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1424 if (!NFSBCMP(lp->nfsl_owner, own, 1425 NFSV4CL_LOCKNAMELEN)) 1426 break; 1427 } 1428 if (lp != NULL) { 1429 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1430 if (lop->nfslo_first >= end) 1431 break; 1432 if (lop->nfslo_end <= off) 1433 continue; 1434 if (lop->nfslo_type == F_WRLCK) { 1435 nfscl_clrelease(clp); 1436 NFSUNLOCKCLSTATE(); 1437 return (1); 1438 } 1439 } 1440 } 1441 } 1442 1443 /* 1444 * Now, check state against the server. 1445 */ 1446 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh, 1447 np->n_fhp->nfh_len), nfso_hash) { 1448 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1449 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1450 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1451 if (!NFSBCMP(lp->nfsl_owner, own, 1452 NFSV4CL_LOCKNAMELEN)) 1453 break; 1454 } 1455 if (lp != NULL) { 1456 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1457 if (lop->nfslo_first >= end) 1458 break; 1459 if (lop->nfslo_end <= off) 1460 continue; 1461 if (lop->nfslo_type == F_WRLCK) { 1462 nfscl_clrelease(clp); 1463 NFSUNLOCKCLSTATE(); 1464 return (1); 1465 } 1466 } 1467 } 1468 } 1469 } 1470 nfscl_clrelease(clp); 1471 NFSUNLOCKCLSTATE(); 1472 return (0); 1473 } 1474 1475 /* 1476 * Release a byte range lock owner structure. 1477 */ 1478 void 1479 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1480 { 1481 struct nfsclclient *clp; 1482 1483 if (lp == NULL) 1484 return; 1485 NFSLOCKCLSTATE(); 1486 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1487 if (error != 0 && candelete && 1488 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1489 nfscl_freelockowner(lp, 0); 1490 else 1491 nfscl_lockunlock(&lp->nfsl_rwlock); 1492 nfscl_clrelease(clp); 1493 NFSUNLOCKCLSTATE(); 1494 } 1495 1496 /* 1497 * Free up an open structure and any associated byte range lock structures. 1498 */ 1499 void 1500 nfscl_freeopen(struct nfsclopen *op, int local) 1501 { 1502 1503 LIST_REMOVE(op, nfso_list); 1504 if (op->nfso_hash.le_prev != NULL) 1505 LIST_REMOVE(op, nfso_hash); 1506 nfscl_freealllocks(&op->nfso_lock, local); 1507 free(op, M_NFSCLOPEN); 1508 if (local) 1509 nfsstatsv1.cllocalopens--; 1510 else 1511 nfsstatsv1.clopens--; 1512 } 1513 1514 /* 1515 * Free up all lock owners and associated locks. 1516 */ 1517 static void 1518 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1519 { 1520 struct nfscllockowner *lp, *nlp; 1521 1522 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1523 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1524 panic("nfscllckw"); 1525 nfscl_freelockowner(lp, local); 1526 } 1527 } 1528 1529 /* 1530 * Called for an Open when NFSERR_EXPIRED is received from the server. 1531 * If there are no byte range locks nor a Share Deny lost, try to do a 1532 * fresh Open. Otherwise, free the open. 1533 */ 1534 static int 1535 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1536 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1537 { 1538 struct nfscllockowner *lp; 1539 struct nfscldeleg *dp; 1540 int mustdelete = 0, error; 1541 1542 /* 1543 * Look for any byte range lock(s). 1544 */ 1545 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1546 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1547 mustdelete = 1; 1548 break; 1549 } 1550 } 1551 1552 /* 1553 * If no byte range lock(s) nor a Share deny, try to re-open. 1554 */ 1555 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1556 newnfs_copycred(&op->nfso_cred, cred); 1557 dp = NULL; 1558 error = nfsrpc_reopen(nmp, op->nfso_fh, 1559 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1560 if (error) { 1561 mustdelete = 1; 1562 if (dp != NULL) { 1563 free(dp, M_NFSCLDELEG); 1564 dp = NULL; 1565 } 1566 } 1567 if (dp != NULL) 1568 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1569 op->nfso_fhlen, cred, p, &dp); 1570 } 1571 1572 /* 1573 * If a byte range lock or Share deny or couldn't re-open, free it. 1574 */ 1575 if (mustdelete) 1576 nfscl_freeopen(op, 0); 1577 return (mustdelete); 1578 } 1579 1580 /* 1581 * Free up an open owner structure. 1582 */ 1583 static void 1584 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1585 { 1586 1587 LIST_REMOVE(owp, nfsow_list); 1588 free(owp, M_NFSCLOWNER); 1589 if (local) 1590 nfsstatsv1.cllocalopenowners--; 1591 else 1592 nfsstatsv1.clopenowners--; 1593 } 1594 1595 /* 1596 * Free up a byte range lock owner structure. 1597 */ 1598 void 1599 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1600 { 1601 struct nfscllock *lop, *nlop; 1602 1603 LIST_REMOVE(lp, nfsl_list); 1604 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1605 nfscl_freelock(lop, local); 1606 } 1607 free(lp, M_NFSCLLOCKOWNER); 1608 if (local) 1609 nfsstatsv1.cllocallockowners--; 1610 else 1611 nfsstatsv1.cllockowners--; 1612 } 1613 1614 /* 1615 * Free up a byte range lock structure. 1616 */ 1617 void 1618 nfscl_freelock(struct nfscllock *lop, int local) 1619 { 1620 1621 LIST_REMOVE(lop, nfslo_list); 1622 free(lop, M_NFSCLLOCK); 1623 if (local) 1624 nfsstatsv1.cllocallocks--; 1625 else 1626 nfsstatsv1.cllocks--; 1627 } 1628 1629 /* 1630 * Clean out the state related to a delegation. 1631 */ 1632 static void 1633 nfscl_cleandeleg(struct nfscldeleg *dp) 1634 { 1635 struct nfsclowner *owp, *nowp; 1636 struct nfsclopen *op; 1637 1638 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1639 op = LIST_FIRST(&owp->nfsow_open); 1640 if (op != NULL) { 1641 if (LIST_NEXT(op, nfso_list) != NULL) 1642 panic("nfscleandel"); 1643 nfscl_freeopen(op, 1); 1644 } 1645 nfscl_freeopenowner(owp, 1); 1646 } 1647 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1648 } 1649 1650 /* 1651 * Free a delegation. 1652 */ 1653 static void 1654 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp, bool freeit) 1655 { 1656 1657 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1658 LIST_REMOVE(dp, nfsdl_hash); 1659 if (freeit) 1660 free(dp, M_NFSCLDELEG); 1661 nfsstatsv1.cldelegates--; 1662 nfscl_delegcnt--; 1663 } 1664 1665 /* 1666 * Free up all state related to this client structure. 1667 */ 1668 static void 1669 nfscl_cleanclient(struct nfsclclient *clp) 1670 { 1671 struct nfsclowner *owp, *nowp; 1672 struct nfsclopen *op, *nop; 1673 struct nfscllayout *lyp, *nlyp; 1674 struct nfscldevinfo *dip, *ndip; 1675 1676 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 1677 nfscl_freelayout(lyp); 1678 1679 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) 1680 nfscl_freedevinfo(dip); 1681 1682 /* Now, all the OpenOwners, etc. */ 1683 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1684 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1685 nfscl_freeopen(op, 0); 1686 } 1687 nfscl_freeopenowner(owp, 0); 1688 } 1689 } 1690 1691 /* 1692 * Called when an NFSERR_EXPIRED is received from the server. 1693 */ 1694 static void 1695 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1696 struct ucred *cred, NFSPROC_T *p) 1697 { 1698 struct nfsclowner *owp, *nowp, *towp; 1699 struct nfsclopen *op, *nop, *top; 1700 struct nfscldeleg *dp, *ndp; 1701 int ret, printed = 0; 1702 1703 /* 1704 * First, merge locally issued Opens into the list for the server. 1705 */ 1706 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1707 while (dp != NULL) { 1708 ndp = TAILQ_NEXT(dp, nfsdl_list); 1709 owp = LIST_FIRST(&dp->nfsdl_owner); 1710 while (owp != NULL) { 1711 nowp = LIST_NEXT(owp, nfsow_list); 1712 op = LIST_FIRST(&owp->nfsow_open); 1713 if (op != NULL) { 1714 if (LIST_NEXT(op, nfso_list) != NULL) 1715 panic("nfsclexp"); 1716 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1717 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1718 NFSV4CL_LOCKNAMELEN)) 1719 break; 1720 } 1721 if (towp != NULL) { 1722 /* Merge opens in */ 1723 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1724 if (top->nfso_fhlen == op->nfso_fhlen && 1725 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1726 op->nfso_fhlen)) { 1727 top->nfso_mode |= op->nfso_mode; 1728 top->nfso_opencnt += op->nfso_opencnt; 1729 break; 1730 } 1731 } 1732 if (top == NULL) { 1733 /* Just add the open to the owner list */ 1734 LIST_REMOVE(op, nfso_list); 1735 op->nfso_own = towp; 1736 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1737 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh, 1738 op->nfso_fhlen), op, nfso_hash); 1739 nfsstatsv1.cllocalopens--; 1740 nfsstatsv1.clopens++; 1741 } 1742 } else { 1743 /* Just add the openowner to the client list */ 1744 LIST_REMOVE(owp, nfsow_list); 1745 owp->nfsow_clp = clp; 1746 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1747 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh, 1748 op->nfso_fhlen), op, nfso_hash); 1749 nfsstatsv1.cllocalopenowners--; 1750 nfsstatsv1.clopenowners++; 1751 nfsstatsv1.cllocalopens--; 1752 nfsstatsv1.clopens++; 1753 } 1754 } 1755 owp = nowp; 1756 } 1757 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1758 printed = 1; 1759 printf("nfsv4 expired locks lost\n"); 1760 } 1761 nfscl_cleandeleg(dp); 1762 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 1763 dp = ndp; 1764 } 1765 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1766 panic("nfsclexp"); 1767 1768 /* 1769 * Now, try and reopen against the server. 1770 */ 1771 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1772 owp->nfsow_seqid = 0; 1773 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1774 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1775 if (ret && !printed) { 1776 printed = 1; 1777 printf("nfsv4 expired locks lost\n"); 1778 } 1779 } 1780 if (LIST_EMPTY(&owp->nfsow_open)) 1781 nfscl_freeopenowner(owp, 0); 1782 } 1783 } 1784 1785 /* 1786 * This function must be called after the process represented by "own" has 1787 * exited. Must be called with CLSTATE lock held. 1788 */ 1789 static void 1790 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1791 { 1792 struct nfsclowner *owp, *nowp; 1793 struct nfscllockowner *lp, *nlp; 1794 struct nfscldeleg *dp; 1795 1796 /* First, get rid of local locks on delegations. */ 1797 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1798 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1799 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1800 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1801 panic("nfscllckw"); 1802 nfscl_freelockowner(lp, 1); 1803 } 1804 } 1805 } 1806 owp = LIST_FIRST(&clp->nfsc_owner); 1807 while (owp != NULL) { 1808 nowp = LIST_NEXT(owp, nfsow_list); 1809 if (!NFSBCMP(owp->nfsow_owner, own, 1810 NFSV4CL_LOCKNAMELEN)) { 1811 /* 1812 * If there are children that haven't closed the 1813 * file descriptors yet, the opens will still be 1814 * here. For that case, let the renew thread clear 1815 * out the OpenOwner later. 1816 */ 1817 if (LIST_EMPTY(&owp->nfsow_open)) 1818 nfscl_freeopenowner(owp, 0); 1819 else 1820 owp->nfsow_defunct = 1; 1821 } 1822 owp = nowp; 1823 } 1824 } 1825 1826 /* 1827 * Find open/lock owners for processes that have exited. 1828 */ 1829 static void 1830 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1831 { 1832 struct nfsclowner *owp, *nowp; 1833 struct nfsclopen *op; 1834 struct nfscllockowner *lp, *nlp; 1835 struct nfscldeleg *dp; 1836 1837 /* 1838 * All the pidhash locks must be acquired, since they are sx locks 1839 * and must be acquired before the mutexes. The pid(s) that will 1840 * be used aren't known yet, so all the locks need to be acquired. 1841 * Fortunately, this function is only performed once/sec. 1842 */ 1843 pidhash_slockall(); 1844 NFSLOCKCLSTATE(); 1845 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1846 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1847 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1848 if (LIST_EMPTY(&lp->nfsl_lock)) 1849 nfscl_emptylockowner(lp, lhp); 1850 } 1851 } 1852 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1853 nfscl_cleanup_common(clp, owp->nfsow_owner); 1854 } 1855 1856 /* 1857 * For the single open_owner case, these lock owners need to be 1858 * checked to see if they still exist separately. 1859 * This is because nfscl_procdoesntexist() never returns true for 1860 * the single open_owner so that the above doesn't ever call 1861 * nfscl_cleanup_common(). 1862 */ 1863 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1864 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1865 if (nfscl_procdoesntexist(lp->nfsl_owner)) 1866 nfscl_cleanup_common(clp, lp->nfsl_owner); 1867 } 1868 } 1869 NFSUNLOCKCLSTATE(); 1870 pidhash_sunlockall(); 1871 } 1872 1873 /* 1874 * Take the empty lock owner and move it to the local lhp list if the 1875 * associated process no longer exists. 1876 */ 1877 static void 1878 nfscl_emptylockowner(struct nfscllockowner *lp, 1879 struct nfscllockownerfhhead *lhp) 1880 { 1881 struct nfscllockownerfh *lfhp, *mylfhp; 1882 struct nfscllockowner *nlp; 1883 int fnd_it; 1884 1885 /* If not a Posix lock owner, just return. */ 1886 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1887 return; 1888 1889 fnd_it = 0; 1890 mylfhp = NULL; 1891 /* 1892 * First, search to see if this lock owner is already in the list. 1893 * If it is, then the associated process no longer exists. 1894 */ 1895 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1896 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1897 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1898 lfhp->nfslfh_len)) 1899 mylfhp = lfhp; 1900 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1901 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1902 NFSV4CL_LOCKNAMELEN)) 1903 fnd_it = 1; 1904 } 1905 /* If not found, check if process still exists. */ 1906 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1907 return; 1908 1909 /* Move the lock owner over to the local list. */ 1910 if (mylfhp == NULL) { 1911 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1912 M_NOWAIT); 1913 if (mylfhp == NULL) 1914 return; 1915 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1916 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1917 mylfhp->nfslfh_len); 1918 LIST_INIT(&mylfhp->nfslfh_lock); 1919 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1920 } 1921 LIST_REMOVE(lp, nfsl_list); 1922 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1923 } 1924 1925 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1926 /* 1927 * Called from nfs umount to free up the clientid. 1928 */ 1929 void 1930 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1931 { 1932 struct nfsclclient *clp; 1933 struct ucred *cred; 1934 int igotlock; 1935 1936 /* 1937 * For the case that matters, this is the thread that set 1938 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1939 * done to ensure that any thread executing nfscl_getcl() after 1940 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1941 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1942 * explanation, courtesy of Alan Cox. 1943 * What follows is a snippet from Alan Cox's email at: 1944 * https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1945 * 1946 * 1. Set MNTK_UNMOUNTF 1947 * 2. Acquire a standard FreeBSD mutex "m". 1948 * 3. Update some data structures. 1949 * 4. Release mutex "m". 1950 * 1951 * Then, other threads that acquire "m" after step 4 has occurred will 1952 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1953 * step 2 may or may not see MNTK_UNMOUNTF as set. 1954 */ 1955 NFSLOCKCLSTATE(); 1956 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1957 fake_global++; 1958 NFSUNLOCKCLSTATE(); 1959 NFSLOCKCLSTATE(); 1960 } 1961 1962 clp = nmp->nm_clp; 1963 if (clp != NULL) { 1964 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1965 panic("nfscl umount"); 1966 1967 /* 1968 * First, handshake with the nfscl renew thread, to terminate 1969 * it. 1970 */ 1971 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1972 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1973 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1974 "nfsclumnt", hz); 1975 1976 /* 1977 * Now, get the exclusive lock on the client state, so 1978 * that no uses of the state are still in progress. 1979 */ 1980 do { 1981 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1982 NFSCLSTATEMUTEXPTR, NULL); 1983 } while (!igotlock); 1984 NFSUNLOCKCLSTATE(); 1985 1986 /* 1987 * Free up all the state. It will expire on the server, but 1988 * maybe we should do a SetClientId/SetClientIdConfirm so 1989 * the server throws it away? 1990 */ 1991 LIST_REMOVE(clp, nfsc_list); 1992 nfscl_delegreturnall(clp, p); 1993 cred = newnfs_getcred(); 1994 if (NFSHASNFSV4N(nmp)) { 1995 (void)nfsrpc_destroysession(nmp, clp, cred, p); 1996 (void)nfsrpc_destroyclient(nmp, clp, cred, p); 1997 } else 1998 (void)nfsrpc_setclient(nmp, clp, 0, NULL, cred, p); 1999 nfscl_cleanclient(clp); 2000 nmp->nm_clp = NULL; 2001 NFSFREECRED(cred); 2002 free(clp, M_NFSCLCLIENT); 2003 } else 2004 NFSUNLOCKCLSTATE(); 2005 } 2006 2007 /* 2008 * This function is called when a server replies with NFSERR_STALECLIENTID 2009 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 2010 * doing Opens and Locks with reclaim. If these fail, it deletes the 2011 * corresponding state. 2012 */ 2013 static void 2014 nfscl_recover(struct nfsclclient *clp, bool *retokp, struct ucred *cred, 2015 NFSPROC_T *p) 2016 { 2017 struct nfsclowner *owp, *nowp; 2018 struct nfsclopen *op, *nop; 2019 struct nfscllockowner *lp, *nlp; 2020 struct nfscllock *lop, *nlop; 2021 struct nfscldeleg *dp, *ndp, *tdp; 2022 struct nfsmount *nmp; 2023 struct ucred *tcred; 2024 struct nfsclopenhead extra_open; 2025 struct nfscldeleghead extra_deleg; 2026 struct nfsreq *rep; 2027 u_int64_t len; 2028 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 2029 int i, igotlock = 0, error, trycnt, firstlock; 2030 struct nfscllayout *lyp, *nlyp; 2031 bool recovered_one; 2032 2033 /* 2034 * First, lock the client structure, so everyone else will 2035 * block when trying to use state. 2036 */ 2037 NFSLOCKCLSTATE(); 2038 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2039 do { 2040 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2041 NFSCLSTATEMUTEXPTR, NULL); 2042 } while (!igotlock); 2043 NFSUNLOCKCLSTATE(); 2044 2045 nmp = clp->nfsc_nmp; 2046 if (nmp == NULL) 2047 panic("nfscl recover"); 2048 2049 /* 2050 * For now, just get rid of all layouts. There may be a need 2051 * to do LayoutCommit Ops with reclaim == true later. 2052 */ 2053 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 2054 nfscl_freelayout(lyp); 2055 TAILQ_INIT(&clp->nfsc_layout); 2056 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 2057 LIST_INIT(&clp->nfsc_layouthash[i]); 2058 2059 trycnt = 5; 2060 tcred = NULL; 2061 do { 2062 error = nfsrpc_setclient(nmp, clp, 1, retokp, cred, p); 2063 } while ((error == NFSERR_STALECLIENTID || 2064 error == NFSERR_BADSESSION || 2065 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2066 if (error) { 2067 NFSLOCKCLSTATE(); 2068 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 2069 NFSCLFLAGS_RECVRINPROG); 2070 wakeup(&clp->nfsc_flags); 2071 nfsv4_unlock(&clp->nfsc_lock, 0); 2072 NFSUNLOCKCLSTATE(); 2073 return; 2074 } 2075 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2076 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2077 2078 /* 2079 * Mark requests already queued on the server, so that they don't 2080 * initiate another recovery cycle. Any requests already in the 2081 * queue that handle state information will have the old stale 2082 * clientid/stateid and will get a NFSERR_STALESTATEID, 2083 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 2084 * This will be translated to NFSERR_STALEDONTRECOVER when 2085 * R_DONTRECOVER is set. 2086 */ 2087 NFSLOCKREQ(); 2088 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 2089 if (rep->r_nmp == nmp) 2090 rep->r_flags |= R_DONTRECOVER; 2091 } 2092 NFSUNLOCKREQ(); 2093 2094 /* 2095 * If nfsrpc_setclient() returns *retokp == true, 2096 * no more recovery is needed. 2097 */ 2098 if (*retokp) 2099 goto out; 2100 2101 /* 2102 * Now, mark all delegations "need reclaim". 2103 */ 2104 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 2105 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 2106 2107 TAILQ_INIT(&extra_deleg); 2108 LIST_INIT(&extra_open); 2109 /* 2110 * Now traverse the state lists, doing Open and Lock Reclaims. 2111 */ 2112 tcred = newnfs_getcred(); 2113 recovered_one = false; 2114 owp = LIST_FIRST(&clp->nfsc_owner); 2115 while (owp != NULL) { 2116 nowp = LIST_NEXT(owp, nfsow_list); 2117 owp->nfsow_seqid = 0; 2118 op = LIST_FIRST(&owp->nfsow_open); 2119 while (op != NULL) { 2120 nop = LIST_NEXT(op, nfso_list); 2121 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2122 /* Search for a delegation to reclaim with the open */ 2123 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2124 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2125 continue; 2126 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2127 mode = NFSV4OPEN_ACCESSWRITE; 2128 delegtype = NFSV4OPEN_DELEGATEWRITE; 2129 } else { 2130 mode = NFSV4OPEN_ACCESSREAD; 2131 delegtype = NFSV4OPEN_DELEGATEREAD; 2132 } 2133 if ((op->nfso_mode & mode) == mode && 2134 op->nfso_fhlen == dp->nfsdl_fhlen && 2135 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 2136 break; 2137 } 2138 ndp = dp; 2139 if (dp == NULL) 2140 delegtype = NFSV4OPEN_DELEGATENONE; 2141 newnfs_copycred(&op->nfso_cred, tcred); 2142 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2143 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2144 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2145 tcred, p); 2146 if (!error) { 2147 recovered_one = true; 2148 /* Handle any replied delegation */ 2149 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2150 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2151 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2152 mode = NFSV4OPEN_ACCESSWRITE; 2153 else 2154 mode = NFSV4OPEN_ACCESSREAD; 2155 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2156 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2157 continue; 2158 if ((op->nfso_mode & mode) == mode && 2159 op->nfso_fhlen == dp->nfsdl_fhlen && 2160 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2161 op->nfso_fhlen)) { 2162 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2163 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2164 dp->nfsdl_ace = ndp->nfsdl_ace; 2165 dp->nfsdl_change = ndp->nfsdl_change; 2166 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2167 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2168 dp->nfsdl_flags |= NFSCLDL_RECALL; 2169 free(ndp, M_NFSCLDELEG); 2170 ndp = NULL; 2171 break; 2172 } 2173 } 2174 } 2175 if (ndp != NULL) 2176 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2177 2178 /* and reclaim all byte range locks */ 2179 lp = LIST_FIRST(&op->nfso_lock); 2180 while (lp != NULL) { 2181 nlp = LIST_NEXT(lp, nfsl_list); 2182 lp->nfsl_seqid = 0; 2183 firstlock = 1; 2184 lop = LIST_FIRST(&lp->nfsl_lock); 2185 while (lop != NULL) { 2186 nlop = LIST_NEXT(lop, nfslo_list); 2187 if (lop->nfslo_end == NFS64BITSSET) 2188 len = NFS64BITSSET; 2189 else 2190 len = lop->nfslo_end - lop->nfslo_first; 2191 error = nfscl_trylock(nmp, NULL, 2192 op->nfso_fh, op->nfso_fhlen, lp, 2193 firstlock, 1, lop->nfslo_first, len, 2194 lop->nfslo_type, tcred, p); 2195 if (error != 0) 2196 nfscl_freelock(lop, 0); 2197 else 2198 firstlock = 0; 2199 lop = nlop; 2200 } 2201 /* If no locks, but a lockowner, just delete it. */ 2202 if (LIST_EMPTY(&lp->nfsl_lock)) 2203 nfscl_freelockowner(lp, 0); 2204 lp = nlp; 2205 } 2206 } else if (error == NFSERR_NOGRACE && !recovered_one && 2207 NFSHASNFSV4N(nmp)) { 2208 /* 2209 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will 2210 * actually end up here, since the client will do 2211 * a recovery for NFSERR_BADSESSION, but will get 2212 * an NFSERR_NOGRACE reply for the first "reclaim" 2213 * attempt. 2214 * So, call nfscl_expireclient() to recover the 2215 * opens as best we can and then do a reclaim 2216 * complete and return. 2217 */ 2218 nfsrpc_reclaimcomplete(nmp, cred, p); 2219 nfscl_expireclient(clp, nmp, tcred, p); 2220 goto out; 2221 } 2222 } 2223 if (error != 0 && error != NFSERR_BADSESSION) 2224 nfscl_freeopen(op, 0); 2225 op = nop; 2226 } 2227 owp = nowp; 2228 } 2229 2230 /* 2231 * Now, try and get any delegations not yet reclaimed by cobbling 2232 * to-gether an appropriate open. 2233 */ 2234 nowp = NULL; 2235 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2236 while (dp != NULL) { 2237 ndp = TAILQ_NEXT(dp, nfsdl_list); 2238 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2239 if (nowp == NULL) { 2240 nowp = malloc( 2241 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2242 /* 2243 * Name must be as long an largest possible 2244 * NFSV4CL_LOCKNAMELEN. 12 for now. 2245 */ 2246 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2247 NFSV4CL_LOCKNAMELEN); 2248 LIST_INIT(&nowp->nfsow_open); 2249 nowp->nfsow_clp = clp; 2250 nowp->nfsow_seqid = 0; 2251 nowp->nfsow_defunct = 0; 2252 nfscl_lockinit(&nowp->nfsow_rwlock); 2253 } 2254 nop = NULL; 2255 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2256 nop = malloc(sizeof (struct nfsclopen) + 2257 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2258 nop->nfso_own = nowp; 2259 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2260 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2261 delegtype = NFSV4OPEN_DELEGATEWRITE; 2262 } else { 2263 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2264 delegtype = NFSV4OPEN_DELEGATEREAD; 2265 } 2266 nop->nfso_opencnt = 0; 2267 nop->nfso_posixlock = 1; 2268 nop->nfso_fhlen = dp->nfsdl_fhlen; 2269 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2270 LIST_INIT(&nop->nfso_lock); 2271 nop->nfso_stateid.seqid = 0; 2272 nop->nfso_stateid.other[0] = 0; 2273 nop->nfso_stateid.other[1] = 0; 2274 nop->nfso_stateid.other[2] = 0; 2275 newnfs_copycred(&dp->nfsdl_cred, tcred); 2276 newnfs_copyincred(tcred, &nop->nfso_cred); 2277 tdp = NULL; 2278 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2279 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2280 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2281 delegtype, tcred, p); 2282 if (tdp != NULL) { 2283 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2284 mode = NFSV4OPEN_ACCESSWRITE; 2285 else 2286 mode = NFSV4OPEN_ACCESSREAD; 2287 if ((nop->nfso_mode & mode) == mode && 2288 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2289 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2290 nop->nfso_fhlen)) { 2291 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2292 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2293 dp->nfsdl_ace = tdp->nfsdl_ace; 2294 dp->nfsdl_change = tdp->nfsdl_change; 2295 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2296 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2297 dp->nfsdl_flags |= NFSCLDL_RECALL; 2298 free(tdp, M_NFSCLDELEG); 2299 } else { 2300 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2301 } 2302 } 2303 } 2304 if (error) { 2305 if (nop != NULL) 2306 free(nop, M_NFSCLOPEN); 2307 if (error == NFSERR_NOGRACE && !recovered_one && 2308 NFSHASNFSV4N(nmp)) { 2309 /* 2310 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will 2311 * actually end up here, since the client will do 2312 * a recovery for NFSERR_BADSESSION, but will get 2313 * an NFSERR_NOGRACE reply for the first "reclaim" 2314 * attempt. 2315 * So, call nfscl_expireclient() to recover the 2316 * opens as best we can and then do a reclaim 2317 * complete and return. 2318 */ 2319 nfsrpc_reclaimcomplete(nmp, cred, p); 2320 nfscl_expireclient(clp, nmp, tcred, p); 2321 free(nowp, M_NFSCLOWNER); 2322 goto out; 2323 } 2324 /* 2325 * Couldn't reclaim it, so throw the state 2326 * away. Ouch!! 2327 */ 2328 nfscl_cleandeleg(dp); 2329 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 2330 } else { 2331 recovered_one = true; 2332 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2333 } 2334 } 2335 dp = ndp; 2336 } 2337 2338 /* 2339 * Now, get rid of extra Opens and Delegations. 2340 */ 2341 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2342 do { 2343 newnfs_copycred(&op->nfso_cred, tcred); 2344 error = nfscl_tryclose(op, tcred, nmp, p); 2345 if (error == NFSERR_GRACE) 2346 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2347 } while (error == NFSERR_GRACE); 2348 LIST_REMOVE(op, nfso_list); 2349 free(op, M_NFSCLOPEN); 2350 } 2351 if (nowp != NULL) 2352 free(nowp, M_NFSCLOWNER); 2353 2354 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2355 do { 2356 newnfs_copycred(&dp->nfsdl_cred, tcred); 2357 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2358 if (error == NFSERR_GRACE) 2359 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2360 } while (error == NFSERR_GRACE); 2361 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2362 free(dp, M_NFSCLDELEG); 2363 } 2364 2365 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2366 if (NFSHASNFSV4N(nmp)) 2367 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2368 2369 out: 2370 NFSLOCKCLSTATE(); 2371 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2372 wakeup(&clp->nfsc_flags); 2373 nfsv4_unlock(&clp->nfsc_lock, 0); 2374 NFSUNLOCKCLSTATE(); 2375 if (tcred != NULL) 2376 NFSFREECRED(tcred); 2377 } 2378 2379 /* 2380 * This function is called when a server replies with NFSERR_EXPIRED. 2381 * It deletes all state for the client and does a fresh SetClientId/confirm. 2382 * XXX Someday it should post a signal to the process(es) that hold the 2383 * state, so they know that lock state has been lost. 2384 */ 2385 int 2386 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2387 { 2388 struct nfsmount *nmp; 2389 struct ucred *cred; 2390 int igotlock = 0, error, trycnt; 2391 2392 /* 2393 * If the clientid has gone away or a new SetClientid has already 2394 * been done, just return ok. 2395 */ 2396 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2397 return (0); 2398 2399 /* 2400 * First, lock the client structure, so everyone else will 2401 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2402 * that only one thread does the work. 2403 */ 2404 NFSLOCKCLSTATE(); 2405 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2406 do { 2407 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2408 NFSCLSTATEMUTEXPTR, NULL); 2409 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2410 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2411 if (igotlock) 2412 nfsv4_unlock(&clp->nfsc_lock, 0); 2413 NFSUNLOCKCLSTATE(); 2414 return (0); 2415 } 2416 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2417 NFSUNLOCKCLSTATE(); 2418 2419 nmp = clp->nfsc_nmp; 2420 if (nmp == NULL) 2421 panic("nfscl expired"); 2422 cred = newnfs_getcred(); 2423 trycnt = 5; 2424 do { 2425 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p); 2426 } while ((error == NFSERR_STALECLIENTID || 2427 error == NFSERR_BADSESSION || 2428 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2429 if (error) { 2430 NFSLOCKCLSTATE(); 2431 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2432 } else { 2433 /* 2434 * Expire the state for the client. 2435 */ 2436 nfscl_expireclient(clp, nmp, cred, p); 2437 NFSLOCKCLSTATE(); 2438 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2439 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2440 } 2441 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2442 wakeup(&clp->nfsc_flags); 2443 nfsv4_unlock(&clp->nfsc_lock, 0); 2444 NFSUNLOCKCLSTATE(); 2445 NFSFREECRED(cred); 2446 return (error); 2447 } 2448 2449 /* 2450 * This function inserts a lock in the list after insert_lop. 2451 */ 2452 static void 2453 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2454 struct nfscllock *insert_lop, int local) 2455 { 2456 2457 if ((struct nfscllockowner *)insert_lop == lp) 2458 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2459 else 2460 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2461 if (local) 2462 nfsstatsv1.cllocallocks++; 2463 else 2464 nfsstatsv1.cllocks++; 2465 } 2466 2467 /* 2468 * This function updates the locking for a lock owner and given file. It 2469 * maintains a list of lock ranges ordered on increasing file offset that 2470 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2471 * It always adds new_lop to the list and sometimes uses the one pointed 2472 * at by other_lopp. 2473 * Returns 1 if the locks were modified, 0 otherwise. 2474 */ 2475 static int 2476 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2477 struct nfscllock **other_lopp, int local) 2478 { 2479 struct nfscllock *new_lop = *new_lopp; 2480 struct nfscllock *lop, *tlop, *ilop; 2481 struct nfscllock *other_lop; 2482 int unlock = 0, modified = 0; 2483 u_int64_t tmp; 2484 2485 /* 2486 * Work down the list until the lock is merged. 2487 */ 2488 if (new_lop->nfslo_type == F_UNLCK) 2489 unlock = 1; 2490 ilop = (struct nfscllock *)lp; 2491 lop = LIST_FIRST(&lp->nfsl_lock); 2492 while (lop != NULL) { 2493 /* 2494 * Only check locks for this file that aren't before the start of 2495 * new lock's range. 2496 */ 2497 if (lop->nfslo_end >= new_lop->nfslo_first) { 2498 if (new_lop->nfslo_end < lop->nfslo_first) { 2499 /* 2500 * If the new lock ends before the start of the 2501 * current lock's range, no merge, just insert 2502 * the new lock. 2503 */ 2504 break; 2505 } 2506 if (new_lop->nfslo_type == lop->nfslo_type || 2507 (new_lop->nfslo_first <= lop->nfslo_first && 2508 new_lop->nfslo_end >= lop->nfslo_end)) { 2509 /* 2510 * This lock can be absorbed by the new lock/unlock. 2511 * This happens when it covers the entire range 2512 * of the old lock or is contiguous 2513 * with the old lock and is of the same type or an 2514 * unlock. 2515 */ 2516 if (new_lop->nfslo_type != lop->nfslo_type || 2517 new_lop->nfslo_first != lop->nfslo_first || 2518 new_lop->nfslo_end != lop->nfslo_end) 2519 modified = 1; 2520 if (lop->nfslo_first < new_lop->nfslo_first) 2521 new_lop->nfslo_first = lop->nfslo_first; 2522 if (lop->nfslo_end > new_lop->nfslo_end) 2523 new_lop->nfslo_end = lop->nfslo_end; 2524 tlop = lop; 2525 lop = LIST_NEXT(lop, nfslo_list); 2526 nfscl_freelock(tlop, local); 2527 continue; 2528 } 2529 2530 /* 2531 * All these cases are for contiguous locks that are not the 2532 * same type, so they can't be merged. 2533 */ 2534 if (new_lop->nfslo_first <= lop->nfslo_first) { 2535 /* 2536 * This case is where the new lock overlaps with the 2537 * first part of the old lock. Move the start of the 2538 * old lock to just past the end of the new lock. The 2539 * new lock will be inserted in front of the old, since 2540 * ilop hasn't been updated. (We are done now.) 2541 */ 2542 if (lop->nfslo_first != new_lop->nfslo_end) { 2543 lop->nfslo_first = new_lop->nfslo_end; 2544 modified = 1; 2545 } 2546 break; 2547 } 2548 if (new_lop->nfslo_end >= lop->nfslo_end) { 2549 /* 2550 * This case is where the new lock overlaps with the 2551 * end of the old lock's range. Move the old lock's 2552 * end to just before the new lock's first and insert 2553 * the new lock after the old lock. 2554 * Might not be done yet, since the new lock could 2555 * overlap further locks with higher ranges. 2556 */ 2557 if (lop->nfslo_end != new_lop->nfslo_first) { 2558 lop->nfslo_end = new_lop->nfslo_first; 2559 modified = 1; 2560 } 2561 ilop = lop; 2562 lop = LIST_NEXT(lop, nfslo_list); 2563 continue; 2564 } 2565 /* 2566 * The final case is where the new lock's range is in the 2567 * middle of the current lock's and splits the current lock 2568 * up. Use *other_lopp to handle the second part of the 2569 * split old lock range. (We are done now.) 2570 * For unlock, we use new_lop as other_lop and tmp, since 2571 * other_lop and new_lop are the same for this case. 2572 * We noted the unlock case above, so we don't need 2573 * new_lop->nfslo_type any longer. 2574 */ 2575 tmp = new_lop->nfslo_first; 2576 if (unlock) { 2577 other_lop = new_lop; 2578 *new_lopp = NULL; 2579 } else { 2580 other_lop = *other_lopp; 2581 *other_lopp = NULL; 2582 } 2583 other_lop->nfslo_first = new_lop->nfslo_end; 2584 other_lop->nfslo_end = lop->nfslo_end; 2585 other_lop->nfslo_type = lop->nfslo_type; 2586 lop->nfslo_end = tmp; 2587 nfscl_insertlock(lp, other_lop, lop, local); 2588 ilop = lop; 2589 modified = 1; 2590 break; 2591 } 2592 ilop = lop; 2593 lop = LIST_NEXT(lop, nfslo_list); 2594 if (lop == NULL) 2595 break; 2596 } 2597 2598 /* 2599 * Insert the new lock in the list at the appropriate place. 2600 */ 2601 if (!unlock) { 2602 nfscl_insertlock(lp, new_lop, ilop, local); 2603 *new_lopp = NULL; 2604 modified = 1; 2605 } 2606 return (modified); 2607 } 2608 2609 /* 2610 * This function must be run as a kernel thread. 2611 * It does Renew Ops and recovery, when required. 2612 */ 2613 void 2614 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2615 { 2616 struct nfsclowner *owp, *nowp; 2617 struct nfsclopen *op; 2618 struct nfscllockowner *lp, *nlp; 2619 struct nfscldeleghead dh; 2620 struct nfscldeleg *dp, *ndp; 2621 struct ucred *cred; 2622 u_int32_t clidrev; 2623 int error, cbpathdown, islept, igotlock, ret, clearok; 2624 uint32_t recover_done_time = 0; 2625 time_t mytime; 2626 static time_t prevsec = 0; 2627 struct nfscllockownerfh *lfhp, *nlfhp; 2628 struct nfscllockownerfhhead lfh; 2629 struct nfscllayout *lyp, *nlyp; 2630 struct nfscldevinfo *dip, *ndip; 2631 struct nfscllayouthead rlh; 2632 struct nfsclrecalllayout *recallp; 2633 struct nfsclds *dsp; 2634 bool retok; 2635 struct mount *mp; 2636 vnode_t vp; 2637 2638 cred = newnfs_getcred(); 2639 NFSLOCKCLSTATE(); 2640 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2641 mp = clp->nfsc_nmp->nm_mountp; 2642 NFSUNLOCKCLSTATE(); 2643 for(;;) { 2644 newnfs_setroot(cred); 2645 cbpathdown = 0; 2646 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2647 /* 2648 * Only allow one full recover within 1/2 of the lease 2649 * duration (nfsc_renew). 2650 * retok is value/result. If passed in set to true, 2651 * it indicates only a CreateSession operation should 2652 * be attempted. 2653 * If it is returned true, it indicates that the 2654 * recovery only required a CreateSession. 2655 */ 2656 retok = true; 2657 if (recover_done_time < NFSD_MONOSEC) { 2658 recover_done_time = NFSD_MONOSEC + 2659 clp->nfsc_renew; 2660 retok = false; 2661 } 2662 NFSCL_DEBUG(1, "Doing recovery, only " 2663 "createsession=%d\n", retok); 2664 nfscl_recover(clp, &retok, cred, p); 2665 } 2666 if (clp->nfsc_expire <= NFSD_MONOSEC && 2667 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2668 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2669 clidrev = clp->nfsc_clientidrev; 2670 error = nfsrpc_renew(clp, NULL, cred, p); 2671 if (error == NFSERR_CBPATHDOWN) 2672 cbpathdown = 1; 2673 else if (error == NFSERR_STALECLIENTID || 2674 error == NFSERR_BADSESSION) { 2675 NFSLOCKCLSTATE(); 2676 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2677 NFSUNLOCKCLSTATE(); 2678 } else if (error == NFSERR_EXPIRED) 2679 (void) nfscl_hasexpired(clp, clidrev, p); 2680 } 2681 2682 checkdsrenew: 2683 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2684 /* Do renews for any DS sessions. */ 2685 NFSLOCKMNT(clp->nfsc_nmp); 2686 /* Skip first entry, since the MDS is handled above. */ 2687 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2688 if (dsp != NULL) 2689 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2690 while (dsp != NULL) { 2691 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2692 dsp->nfsclds_sess.nfsess_defunct == 0) { 2693 dsp->nfsclds_expire = NFSD_MONOSEC + 2694 clp->nfsc_renew; 2695 NFSUNLOCKMNT(clp->nfsc_nmp); 2696 (void)nfsrpc_renew(clp, dsp, cred, p); 2697 goto checkdsrenew; 2698 } 2699 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2700 } 2701 NFSUNLOCKMNT(clp->nfsc_nmp); 2702 } 2703 2704 TAILQ_INIT(&dh); 2705 NFSLOCKCLSTATE(); 2706 if (cbpathdown) 2707 /* It's a Total Recall! */ 2708 nfscl_totalrecall(clp); 2709 2710 /* 2711 * Now, handle defunct owners. 2712 */ 2713 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2714 if (LIST_EMPTY(&owp->nfsow_open)) { 2715 if (owp->nfsow_defunct != 0) 2716 nfscl_freeopenowner(owp, 0); 2717 } 2718 } 2719 2720 /* 2721 * Do the recall on any delegations. To avoid trouble, always 2722 * come back up here after having slept. 2723 */ 2724 igotlock = 0; 2725 tryagain: 2726 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2727 while (dp != NULL) { 2728 ndp = TAILQ_NEXT(dp, nfsdl_list); 2729 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2730 /* 2731 * Wait for outstanding I/O ops to be done. 2732 */ 2733 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2734 if (igotlock) { 2735 nfsv4_unlock(&clp->nfsc_lock, 0); 2736 igotlock = 0; 2737 } 2738 dp->nfsdl_rwlock.nfslock_lock |= 2739 NFSV4LOCK_WANTED; 2740 msleep(&dp->nfsdl_rwlock, 2741 NFSCLSTATEMUTEXPTR, PVFS, "nfscld", 2742 5 * hz); 2743 if (NFSCL_FORCEDISM(mp)) 2744 goto terminate; 2745 goto tryagain; 2746 } 2747 while (!igotlock) { 2748 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2749 &islept, NFSCLSTATEMUTEXPTR, mp); 2750 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) 2751 goto terminate; 2752 if (islept) 2753 goto tryagain; 2754 } 2755 NFSUNLOCKCLSTATE(); 2756 newnfs_copycred(&dp->nfsdl_cred, cred); 2757 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2758 NULL, cred, p, 1, &vp); 2759 if (!ret) { 2760 nfscl_cleandeleg(dp); 2761 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2762 nfsdl_list); 2763 LIST_REMOVE(dp, nfsdl_hash); 2764 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2765 nfscl_delegcnt--; 2766 nfsstatsv1.cldelegates--; 2767 } 2768 NFSLOCKCLSTATE(); 2769 /* 2770 * The nfsc_lock must be released before doing 2771 * vrele(), since it might call nfs_inactive(). 2772 * For the unlikely case where the vnode failed 2773 * to be acquired by nfscl_recalldeleg(), a 2774 * VOP_RECLAIM() should be in progress and it 2775 * will return the delegation. 2776 */ 2777 nfsv4_unlock(&clp->nfsc_lock, 0); 2778 igotlock = 0; 2779 if (vp != NULL) { 2780 NFSUNLOCKCLSTATE(); 2781 vrele(vp); 2782 NFSLOCKCLSTATE(); 2783 } 2784 goto tryagain; 2785 } 2786 dp = ndp; 2787 } 2788 2789 /* 2790 * Clear out old delegations, if we are above the high water 2791 * mark. Only clear out ones with no state related to them. 2792 * The tailq list is in LRU order. 2793 */ 2794 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2795 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2796 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2797 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2798 dp->nfsdl_rwlock.nfslock_lock == 0 && 2799 dp->nfsdl_timestamp < NFSD_MONOSEC && 2800 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2801 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2802 clearok = 1; 2803 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2804 op = LIST_FIRST(&owp->nfsow_open); 2805 if (op != NULL) { 2806 clearok = 0; 2807 break; 2808 } 2809 } 2810 if (clearok) { 2811 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2812 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2813 clearok = 0; 2814 break; 2815 } 2816 } 2817 } 2818 if (clearok) { 2819 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2820 LIST_REMOVE(dp, nfsdl_hash); 2821 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2822 nfscl_delegcnt--; 2823 nfsstatsv1.cldelegates--; 2824 } 2825 } 2826 dp = ndp; 2827 } 2828 if (igotlock) 2829 nfsv4_unlock(&clp->nfsc_lock, 0); 2830 2831 /* 2832 * Do the recall on any layouts. To avoid trouble, always 2833 * come back up here after having slept. 2834 */ 2835 TAILQ_INIT(&rlh); 2836 tryagain2: 2837 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2838 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2839 /* 2840 * Wait for outstanding I/O ops to be done. 2841 */ 2842 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2843 (lyp->nfsly_lock.nfslock_lock & 2844 NFSV4LOCK_LOCK) != 0) { 2845 lyp->nfsly_lock.nfslock_lock |= 2846 NFSV4LOCK_WANTED; 2847 msleep(&lyp->nfsly_lock.nfslock_lock, 2848 NFSCLSTATEMUTEXPTR, PVFS, "nfslyp", 2849 5 * hz); 2850 if (NFSCL_FORCEDISM(mp)) 2851 goto terminate; 2852 goto tryagain2; 2853 } 2854 /* Move the layout to the recall list. */ 2855 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2856 nfsly_list); 2857 LIST_REMOVE(lyp, nfsly_hash); 2858 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2859 2860 /* Handle any layout commits. */ 2861 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2862 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2863 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2864 NFSUNLOCKCLSTATE(); 2865 NFSCL_DEBUG(3, "do layoutcommit\n"); 2866 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2867 cred, p); 2868 NFSLOCKCLSTATE(); 2869 goto tryagain2; 2870 } 2871 } 2872 } 2873 2874 /* Now, look for stale layouts. */ 2875 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2876 while (lyp != NULL) { 2877 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2878 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2879 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2880 lyp->nfsly_lock.nfslock_usecnt == 0 && 2881 lyp->nfsly_lock.nfslock_lock == 0) { 2882 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2883 nfscl_layoutcnt); 2884 recallp = malloc(sizeof(*recallp), 2885 M_NFSLAYRECALL, M_NOWAIT); 2886 if (recallp == NULL) 2887 break; 2888 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2889 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2890 lyp->nfsly_stateid.seqid, 0, 0, NULL, 2891 recallp); 2892 } 2893 lyp = nlyp; 2894 } 2895 2896 /* 2897 * Free up any unreferenced device info structures. 2898 */ 2899 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 2900 if (dip->nfsdi_layoutrefs == 0 && 2901 dip->nfsdi_refcnt == 0) { 2902 NFSCL_DEBUG(4, "freeing devinfo\n"); 2903 LIST_REMOVE(dip, nfsdi_list); 2904 nfscl_freedevinfo(dip); 2905 } 2906 } 2907 NFSUNLOCKCLSTATE(); 2908 2909 /* Do layout return(s), as required. */ 2910 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 2911 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 2912 NFSCL_DEBUG(4, "ret layout\n"); 2913 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 2914 nfscl_freelayout(lyp); 2915 } 2916 2917 /* 2918 * Delegreturn any delegations cleaned out or recalled. 2919 */ 2920 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2921 newnfs_copycred(&dp->nfsdl_cred, cred); 2922 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2923 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2924 free(dp, M_NFSCLDELEG); 2925 } 2926 2927 SLIST_INIT(&lfh); 2928 /* 2929 * Call nfscl_cleanupkext() once per second to check for 2930 * open/lock owners where the process has exited. 2931 */ 2932 mytime = NFSD_MONOSEC; 2933 if (prevsec != mytime) { 2934 prevsec = mytime; 2935 nfscl_cleanupkext(clp, &lfh); 2936 } 2937 2938 /* 2939 * Do a ReleaseLockOwner for all lock owners where the 2940 * associated process no longer exists, as found by 2941 * nfscl_cleanupkext(). 2942 */ 2943 newnfs_setroot(cred); 2944 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2945 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2946 nlp) { 2947 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2948 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2949 p); 2950 nfscl_freelockowner(lp, 0); 2951 } 2952 free(lfhp, M_TEMP); 2953 } 2954 SLIST_INIT(&lfh); 2955 2956 NFSLOCKCLSTATE(); 2957 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2958 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2959 hz); 2960 terminate: 2961 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2962 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2963 NFSUNLOCKCLSTATE(); 2964 NFSFREECRED(cred); 2965 wakeup((caddr_t)clp); 2966 return; 2967 } 2968 NFSUNLOCKCLSTATE(); 2969 } 2970 } 2971 2972 /* 2973 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 2974 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 2975 */ 2976 void 2977 nfscl_initiate_recovery(struct nfsclclient *clp) 2978 { 2979 2980 if (clp == NULL) 2981 return; 2982 NFSLOCKCLSTATE(); 2983 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2984 NFSUNLOCKCLSTATE(); 2985 wakeup((caddr_t)clp); 2986 } 2987 2988 /* 2989 * Dump out the state stuff for debugging. 2990 */ 2991 void 2992 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2993 int lockowner, int locks) 2994 { 2995 struct nfsclclient *clp; 2996 struct nfsclowner *owp; 2997 struct nfsclopen *op; 2998 struct nfscllockowner *lp; 2999 struct nfscllock *lop; 3000 struct nfscldeleg *dp; 3001 3002 clp = nmp->nm_clp; 3003 if (clp == NULL) { 3004 printf("nfscl dumpstate NULL clp\n"); 3005 return; 3006 } 3007 NFSLOCKCLSTATE(); 3008 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 3009 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3010 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 3011 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 3012 owp->nfsow_owner[0], owp->nfsow_owner[1], 3013 owp->nfsow_owner[2], owp->nfsow_owner[3], 3014 owp->nfsow_seqid); 3015 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3016 if (opens) 3017 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 3018 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 3019 op->nfso_stateid.other[2], op->nfso_opencnt, 3020 op->nfso_fh[12]); 3021 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 3022 if (lockowner) 3023 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 3024 lp->nfsl_owner[0], lp->nfsl_owner[1], 3025 lp->nfsl_owner[2], lp->nfsl_owner[3], 3026 lp->nfsl_seqid, 3027 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 3028 lp->nfsl_stateid.other[2]); 3029 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3030 if (locks) 3031 #ifdef __FreeBSD__ 3032 printf("lck typ=%d fst=%ju end=%ju\n", 3033 lop->nfslo_type, (intmax_t)lop->nfslo_first, 3034 (intmax_t)lop->nfslo_end); 3035 #else 3036 printf("lck typ=%d fst=%qd end=%qd\n", 3037 lop->nfslo_type, lop->nfslo_first, 3038 lop->nfslo_end); 3039 #endif 3040 } 3041 } 3042 } 3043 } 3044 } 3045 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3046 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 3047 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 3048 owp->nfsow_owner[0], owp->nfsow_owner[1], 3049 owp->nfsow_owner[2], owp->nfsow_owner[3], 3050 owp->nfsow_seqid); 3051 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3052 if (opens) 3053 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 3054 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 3055 op->nfso_stateid.other[2], op->nfso_opencnt, 3056 op->nfso_fh[12]); 3057 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 3058 if (lockowner) 3059 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 3060 lp->nfsl_owner[0], lp->nfsl_owner[1], 3061 lp->nfsl_owner[2], lp->nfsl_owner[3], 3062 lp->nfsl_seqid, 3063 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 3064 lp->nfsl_stateid.other[2]); 3065 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3066 if (locks) 3067 #ifdef __FreeBSD__ 3068 printf("lck typ=%d fst=%ju end=%ju\n", 3069 lop->nfslo_type, (intmax_t)lop->nfslo_first, 3070 (intmax_t)lop->nfslo_end); 3071 #else 3072 printf("lck typ=%d fst=%qd end=%qd\n", 3073 lop->nfslo_type, lop->nfslo_first, 3074 lop->nfslo_end); 3075 #endif 3076 } 3077 } 3078 } 3079 } 3080 NFSUNLOCKCLSTATE(); 3081 } 3082 3083 /* 3084 * Check for duplicate open owners and opens. 3085 * (Only used as a diagnostic aid.) 3086 */ 3087 void 3088 nfscl_dupopen(vnode_t vp, int dupopens) 3089 { 3090 struct nfsclclient *clp; 3091 struct nfsclowner *owp, *owp2; 3092 struct nfsclopen *op, *op2; 3093 struct nfsfh *nfhp; 3094 3095 clp = VFSTONFS(vp->v_mount)->nm_clp; 3096 if (clp == NULL) { 3097 printf("nfscl dupopen NULL clp\n"); 3098 return; 3099 } 3100 nfhp = VTONFS(vp)->n_fhp; 3101 NFSLOCKCLSTATE(); 3102 3103 /* 3104 * First, search for duplicate owners. 3105 * These should never happen! 3106 */ 3107 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3108 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3109 if (owp != owp2 && 3110 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 3111 NFSV4CL_LOCKNAMELEN)) { 3112 NFSUNLOCKCLSTATE(); 3113 printf("DUP OWNER\n"); 3114 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0); 3115 return; 3116 } 3117 } 3118 } 3119 3120 /* 3121 * Now, search for duplicate stateids. 3122 * These shouldn't happen, either. 3123 */ 3124 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3125 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3126 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3127 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3128 if (op != op2 && 3129 (op->nfso_stateid.other[0] != 0 || 3130 op->nfso_stateid.other[1] != 0 || 3131 op->nfso_stateid.other[2] != 0) && 3132 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 3133 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 3134 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 3135 NFSUNLOCKCLSTATE(); 3136 printf("DUP STATEID\n"); 3137 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0); 3138 return; 3139 } 3140 } 3141 } 3142 } 3143 } 3144 3145 /* 3146 * Now search for duplicate opens. 3147 * Duplicate opens for the same owner 3148 * should never occur. Other duplicates are 3149 * possible and are checked for if "dupopens" 3150 * is true. 3151 */ 3152 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3153 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3154 if (nfhp->nfh_len == op2->nfso_fhlen && 3155 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 3156 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3157 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3158 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 3159 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 3160 (!NFSBCMP(op->nfso_own->nfsow_owner, 3161 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 3162 dupopens)) { 3163 if (!NFSBCMP(op->nfso_own->nfsow_owner, 3164 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3165 NFSUNLOCKCLSTATE(); 3166 printf("BADDUP OPEN\n"); 3167 } else { 3168 NFSUNLOCKCLSTATE(); 3169 printf("DUP OPEN\n"); 3170 } 3171 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 3172 0); 3173 return; 3174 } 3175 } 3176 } 3177 } 3178 } 3179 } 3180 NFSUNLOCKCLSTATE(); 3181 } 3182 3183 /* 3184 * During close, find an open that needs to be dereferenced and 3185 * dereference it. If there are no more opens for this file, 3186 * log a message to that effect. 3187 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 3188 * on the file's vnode. 3189 * This is the safe way, since it is difficult to identify 3190 * which open the close is for and I/O can be performed after the 3191 * close(2) system call when a file is mmap'd. 3192 * If it returns 0 for success, there will be a referenced 3193 * clp returned via clpp. 3194 */ 3195 int 3196 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 3197 { 3198 struct nfsclclient *clp; 3199 struct nfsclowner *owp; 3200 struct nfsclopen *op; 3201 struct nfscldeleg *dp; 3202 struct nfsfh *nfhp; 3203 int error, notdecr; 3204 3205 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, &clp); 3206 if (error) 3207 return (error); 3208 *clpp = clp; 3209 3210 nfhp = VTONFS(vp)->n_fhp; 3211 notdecr = 1; 3212 NFSLOCKCLSTATE(); 3213 /* 3214 * First, look for one under a delegation that was locally issued 3215 * and just decrement the opencnt for it. Since all my Opens against 3216 * the server are DENY_NONE, I don't see a problem with hanging 3217 * onto them. (It is much easier to use one of the extant Opens 3218 * that I already have on the server when a Delegation is recalled 3219 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3220 */ 3221 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3222 if (dp != NULL) { 3223 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3224 op = LIST_FIRST(&owp->nfsow_open); 3225 if (op != NULL) { 3226 /* 3227 * Since a delegation is for a file, there 3228 * should never be more than one open for 3229 * each openowner. 3230 */ 3231 if (LIST_NEXT(op, nfso_list) != NULL) 3232 panic("nfscdeleg opens"); 3233 if (notdecr && op->nfso_opencnt > 0) { 3234 notdecr = 0; 3235 op->nfso_opencnt--; 3236 break; 3237 } 3238 } 3239 } 3240 } 3241 3242 /* Now process the opens against the server. */ 3243 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len), 3244 nfso_hash) { 3245 if (op->nfso_fhlen == nfhp->nfh_len && 3246 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3247 nfhp->nfh_len)) { 3248 /* Found an open, decrement cnt if possible */ 3249 if (notdecr && op->nfso_opencnt > 0) { 3250 notdecr = 0; 3251 op->nfso_opencnt--; 3252 } 3253 /* 3254 * There are more opens, so just return. 3255 */ 3256 if (op->nfso_opencnt > 0) { 3257 NFSUNLOCKCLSTATE(); 3258 return (0); 3259 } 3260 } 3261 } 3262 NFSUNLOCKCLSTATE(); 3263 if (notdecr) 3264 printf("nfscl: never fnd open\n"); 3265 return (0); 3266 } 3267 3268 int 3269 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3270 { 3271 struct nfsclclient *clp; 3272 struct nfsclowner *owp, *nowp; 3273 struct nfsclopen *op; 3274 struct nfscldeleg *dp; 3275 struct nfsfh *nfhp; 3276 struct nfsclrecalllayout *recallp; 3277 int error; 3278 3279 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, &clp); 3280 if (error) 3281 return (error); 3282 *clpp = clp; 3283 3284 nfhp = VTONFS(vp)->n_fhp; 3285 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 3286 NFSLOCKCLSTATE(); 3287 /* 3288 * First get rid of the local Open structures, which should be no 3289 * longer in use. 3290 */ 3291 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3292 if (dp != NULL) { 3293 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3294 op = LIST_FIRST(&owp->nfsow_open); 3295 if (op != NULL) { 3296 KASSERT((op->nfso_opencnt == 0), 3297 ("nfscl: bad open cnt on deleg")); 3298 nfscl_freeopen(op, 1); 3299 } 3300 nfscl_freeopenowner(owp, 1); 3301 } 3302 } 3303 3304 /* Return any layouts marked return on close. */ 3305 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp); 3306 3307 /* Now process the opens against the server. */ 3308 lookformore: 3309 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len), 3310 nfso_hash) { 3311 if (op->nfso_fhlen == nfhp->nfh_len && 3312 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3313 nfhp->nfh_len)) { 3314 /* Found an open, close it. */ 3315 #ifdef DIAGNOSTIC 3316 KASSERT((op->nfso_opencnt == 0), 3317 ("nfscl: bad open cnt on server (%d)", 3318 op->nfso_opencnt)); 3319 #endif 3320 NFSUNLOCKCLSTATE(); 3321 nfsrpc_doclose(VFSTONFS(vp->v_mount), op, p); 3322 NFSLOCKCLSTATE(); 3323 goto lookformore; 3324 } 3325 } 3326 NFSUNLOCKCLSTATE(); 3327 /* 3328 * recallp has been set NULL by nfscl_retoncloselayout() if it was 3329 * used by the function, but calling free() with a NULL pointer is ok. 3330 */ 3331 free(recallp, M_NFSLAYRECALL); 3332 return (0); 3333 } 3334 3335 /* 3336 * Return all delegations on this client. 3337 * (Must be called with client sleep lock.) 3338 */ 3339 static void 3340 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3341 { 3342 struct nfscldeleg *dp, *ndp; 3343 struct ucred *cred; 3344 3345 cred = newnfs_getcred(); 3346 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3347 nfscl_cleandeleg(dp); 3348 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3349 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 3350 } 3351 NFSFREECRED(cred); 3352 } 3353 3354 /* 3355 * Return any delegation for this vp. 3356 */ 3357 void 3358 nfscl_delegreturnvp(vnode_t vp, NFSPROC_T *p) 3359 { 3360 struct nfsclclient *clp; 3361 struct nfscldeleg *dp; 3362 struct ucred *cred; 3363 struct nfsnode *np; 3364 struct nfsmount *nmp; 3365 3366 nmp = VFSTONFS(vp->v_mount); 3367 NFSLOCKMNT(nmp); 3368 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 3369 NFSUNLOCKMNT(nmp); 3370 return; 3371 } 3372 NFSUNLOCKMNT(nmp); 3373 np = VTONFS(vp); 3374 cred = newnfs_getcred(); 3375 dp = NULL; 3376 NFSLOCKCLSTATE(); 3377 clp = nmp->nm_clp; 3378 if (clp != NULL) 3379 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3380 np->n_fhp->nfh_len); 3381 if (dp != NULL) { 3382 nfscl_cleandeleg(dp); 3383 nfscl_freedeleg(&clp->nfsc_deleg, dp, false); 3384 NFSUNLOCKCLSTATE(); 3385 newnfs_copycred(&dp->nfsdl_cred, cred); 3386 nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3387 free(dp, M_NFSCLDELEG); 3388 } else 3389 NFSUNLOCKCLSTATE(); 3390 NFSFREECRED(cred); 3391 } 3392 3393 /* 3394 * Do a callback RPC. 3395 */ 3396 void 3397 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3398 { 3399 int clist, gotseq_ok, i, j, k, op, rcalls; 3400 u_int32_t *tl; 3401 struct nfsclclient *clp; 3402 struct nfscldeleg *dp = NULL; 3403 int numops, taglen = -1, error = 0, trunc __unused; 3404 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3405 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3406 vnode_t vp = NULL; 3407 struct nfsnode *np; 3408 struct vattr va; 3409 struct nfsfh *nfhp; 3410 mount_t mp; 3411 nfsattrbit_t attrbits, rattrbits; 3412 nfsv4stateid_t stateid; 3413 uint32_t seqid, slotid = 0, highslot, cachethis __unused; 3414 uint8_t sessionid[NFSX_V4SESSIONID]; 3415 struct mbuf *rep; 3416 struct nfscllayout *lyp; 3417 uint64_t filesid[2], len, off; 3418 int changed, gotone, laytype, recalltype; 3419 uint32_t iomode; 3420 struct nfsclrecalllayout *recallp = NULL; 3421 struct nfsclsession *tsep; 3422 3423 gotseq_ok = 0; 3424 nfsrvd_rephead(nd); 3425 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3426 taglen = fxdr_unsigned(int, *tl); 3427 if (taglen < 0) { 3428 error = EBADRPC; 3429 goto nfsmout; 3430 } 3431 if (taglen <= NFSV4_SMALLSTR) 3432 tagstr = tag; 3433 else 3434 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3435 error = nfsrv_mtostr(nd, tagstr, taglen); 3436 if (error) { 3437 if (taglen > NFSV4_SMALLSTR) 3438 free(tagstr, M_TEMP); 3439 taglen = -1; 3440 goto nfsmout; 3441 } 3442 (void) nfsm_strtom(nd, tag, taglen); 3443 if (taglen > NFSV4_SMALLSTR) { 3444 free(tagstr, M_TEMP); 3445 } 3446 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3447 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3448 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3449 if (minorvers != NFSV4_MINORVERSION && 3450 minorvers != NFSV41_MINORVERSION && 3451 minorvers != NFSV42_MINORVERSION) 3452 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3453 cbident = fxdr_unsigned(u_int32_t, *tl++); 3454 if (nd->nd_repstat) 3455 numops = 0; 3456 else 3457 numops = fxdr_unsigned(int, *tl); 3458 /* 3459 * Loop around doing the sub ops. 3460 */ 3461 for (i = 0; i < numops; i++) { 3462 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3463 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3464 *repp++ = *tl; 3465 op = fxdr_unsigned(int, *tl); 3466 if (op < NFSV4OP_CBGETATTR || 3467 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3468 (op > NFSV4OP_CBNOTIFYDEVID && 3469 minorvers == NFSV41_MINORVERSION) || 3470 (op > NFSV4OP_CBOFFLOAD && 3471 minorvers == NFSV42_MINORVERSION)) { 3472 nd->nd_repstat = NFSERR_OPILLEGAL; 3473 *repp = nfscl_errmap(nd, minorvers); 3474 retops++; 3475 break; 3476 } 3477 nd->nd_procnum = op; 3478 if (op < NFSV42_CBNOPS) 3479 nfsstatsv1.cbrpccnt[nd->nd_procnum]++; 3480 switch (op) { 3481 case NFSV4OP_CBGETATTR: 3482 NFSCL_DEBUG(4, "cbgetattr\n"); 3483 mp = NULL; 3484 vp = NULL; 3485 error = nfsm_getfh(nd, &nfhp); 3486 if (!error) 3487 error = nfsrv_getattrbits(nd, &attrbits, 3488 NULL, NULL); 3489 if (error == 0 && i == 0 && 3490 minorvers != NFSV4_MINORVERSION) 3491 error = NFSERR_OPNOTINSESS; 3492 if (!error) { 3493 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3494 &clp); 3495 if (mp == NULL) 3496 error = NFSERR_SERVERFAULT; 3497 } 3498 if (!error) { 3499 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3500 nfhp->nfh_len, p, &np); 3501 if (!error) 3502 vp = NFSTOV(np); 3503 } 3504 if (!error) { 3505 NFSZERO_ATTRBIT(&rattrbits); 3506 NFSLOCKCLSTATE(); 3507 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3508 nfhp->nfh_len); 3509 if (dp != NULL) { 3510 if (NFSISSET_ATTRBIT(&attrbits, 3511 NFSATTRBIT_SIZE)) { 3512 if (vp != NULL) 3513 va.va_size = np->n_size; 3514 else 3515 va.va_size = 3516 dp->nfsdl_size; 3517 NFSSETBIT_ATTRBIT(&rattrbits, 3518 NFSATTRBIT_SIZE); 3519 } 3520 if (NFSISSET_ATTRBIT(&attrbits, 3521 NFSATTRBIT_CHANGE)) { 3522 va.va_filerev = 3523 dp->nfsdl_change; 3524 if (vp == NULL || 3525 (np->n_flag & NDELEGMOD)) 3526 va.va_filerev++; 3527 NFSSETBIT_ATTRBIT(&rattrbits, 3528 NFSATTRBIT_CHANGE); 3529 } 3530 } else 3531 error = NFSERR_SERVERFAULT; 3532 NFSUNLOCKCLSTATE(); 3533 } 3534 if (vp != NULL) 3535 vrele(vp); 3536 if (mp != NULL) 3537 vfs_unbusy(mp); 3538 if (nfhp != NULL) 3539 free(nfhp, M_NFSFH); 3540 if (!error) 3541 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3542 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3543 (uint64_t)0, NULL); 3544 break; 3545 case NFSV4OP_CBRECALL: 3546 NFSCL_DEBUG(4, "cbrecall\n"); 3547 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3548 NFSX_UNSIGNED); 3549 stateid.seqid = *tl++; 3550 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3551 NFSX_STATEIDOTHER); 3552 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3553 trunc = fxdr_unsigned(int, *tl); 3554 error = nfsm_getfh(nd, &nfhp); 3555 if (error == 0 && i == 0 && 3556 minorvers != NFSV4_MINORVERSION) 3557 error = NFSERR_OPNOTINSESS; 3558 if (!error) { 3559 NFSLOCKCLSTATE(); 3560 if (minorvers == NFSV4_MINORVERSION) 3561 clp = nfscl_getclnt(cbident); 3562 else 3563 clp = nfscl_getclntsess(sessionid); 3564 if (clp != NULL) { 3565 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3566 nfhp->nfh_len); 3567 if (dp != NULL && (dp->nfsdl_flags & 3568 NFSCLDL_DELEGRET) == 0) { 3569 dp->nfsdl_flags |= 3570 NFSCLDL_RECALL; 3571 wakeup((caddr_t)clp); 3572 } 3573 } else { 3574 error = NFSERR_SERVERFAULT; 3575 } 3576 NFSUNLOCKCLSTATE(); 3577 } 3578 if (nfhp != NULL) 3579 free(nfhp, M_NFSFH); 3580 break; 3581 case NFSV4OP_CBLAYOUTRECALL: 3582 NFSCL_DEBUG(4, "cblayrec\n"); 3583 nfhp = NULL; 3584 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3585 laytype = fxdr_unsigned(int, *tl++); 3586 iomode = fxdr_unsigned(uint32_t, *tl++); 3587 if (newnfs_true == *tl++) 3588 changed = 1; 3589 else 3590 changed = 0; 3591 recalltype = fxdr_unsigned(int, *tl); 3592 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n", 3593 laytype, iomode, changed, recalltype); 3594 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3595 M_WAITOK); 3596 if (laytype != NFSLAYOUT_NFSV4_1_FILES && 3597 laytype != NFSLAYOUT_FLEXFILE) 3598 error = NFSERR_NOMATCHLAYOUT; 3599 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3600 error = nfsm_getfh(nd, &nfhp); 3601 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3602 if (error != 0) 3603 goto nfsmout; 3604 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3605 NFSX_STATEID); 3606 off = fxdr_hyper(tl); tl += 2; 3607 len = fxdr_hyper(tl); tl += 2; 3608 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3609 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3610 if (minorvers == NFSV4_MINORVERSION) 3611 error = NFSERR_NOTSUPP; 3612 else if (i == 0) 3613 error = NFSERR_OPNOTINSESS; 3614 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n", 3615 (uintmax_t)off, (uintmax_t)len, 3616 stateid.seqid, error); 3617 if (error == 0) { 3618 NFSLOCKCLSTATE(); 3619 clp = nfscl_getclntsess(sessionid); 3620 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3621 if (clp != NULL) { 3622 lyp = nfscl_findlayout(clp, 3623 nfhp->nfh_fh, 3624 nfhp->nfh_len); 3625 NFSCL_DEBUG(4, "cblyp=%p\n", 3626 lyp); 3627 if (lyp != NULL && 3628 (lyp->nfsly_flags & 3629 (NFSLY_FILES | 3630 NFSLY_FLEXFILE)) != 0 && 3631 !NFSBCMP(stateid.other, 3632 lyp->nfsly_stateid.other, 3633 NFSX_STATEIDOTHER)) { 3634 error = 3635 nfscl_layoutrecall( 3636 recalltype, 3637 lyp, iomode, off, 3638 len, stateid.seqid, 3639 0, 0, NULL, 3640 recallp); 3641 if (error == 0 && 3642 stateid.seqid > 3643 lyp->nfsly_stateid.seqid) 3644 lyp->nfsly_stateid.seqid = 3645 stateid.seqid; 3646 recallp = NULL; 3647 wakeup(clp); 3648 NFSCL_DEBUG(4, 3649 "aft layrcal=%d " 3650 "layseqid=%d\n", 3651 error, 3652 lyp->nfsly_stateid.seqid); 3653 } else 3654 error = 3655 NFSERR_NOMATCHLAYOUT; 3656 } else 3657 error = NFSERR_NOMATCHLAYOUT; 3658 NFSUNLOCKCLSTATE(); 3659 } 3660 free(nfhp, M_NFSFH); 3661 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3662 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3663 filesid[0] = fxdr_hyper(tl); tl += 2; 3664 filesid[1] = fxdr_hyper(tl); tl += 2; 3665 gotone = 0; 3666 NFSLOCKCLSTATE(); 3667 clp = nfscl_getclntsess(sessionid); 3668 if (clp != NULL) { 3669 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3670 nfsly_list) { 3671 if (lyp->nfsly_filesid[0] == 3672 filesid[0] && 3673 lyp->nfsly_filesid[1] == 3674 filesid[1]) { 3675 error = 3676 nfscl_layoutrecall( 3677 recalltype, 3678 lyp, iomode, 0, 3679 UINT64_MAX, 3680 lyp->nfsly_stateid.seqid, 3681 0, 0, NULL, 3682 recallp); 3683 recallp = NULL; 3684 gotone = 1; 3685 } 3686 } 3687 if (gotone != 0) 3688 wakeup(clp); 3689 else 3690 error = NFSERR_NOMATCHLAYOUT; 3691 } else 3692 error = NFSERR_NOMATCHLAYOUT; 3693 NFSUNLOCKCLSTATE(); 3694 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3695 gotone = 0; 3696 NFSLOCKCLSTATE(); 3697 clp = nfscl_getclntsess(sessionid); 3698 if (clp != NULL) { 3699 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3700 nfsly_list) { 3701 error = nfscl_layoutrecall( 3702 recalltype, lyp, iomode, 0, 3703 UINT64_MAX, 3704 lyp->nfsly_stateid.seqid, 3705 0, 0, NULL, recallp); 3706 recallp = NULL; 3707 gotone = 1; 3708 } 3709 if (gotone != 0) 3710 wakeup(clp); 3711 else 3712 error = NFSERR_NOMATCHLAYOUT; 3713 } else 3714 error = NFSERR_NOMATCHLAYOUT; 3715 NFSUNLOCKCLSTATE(); 3716 } else 3717 error = NFSERR_NOMATCHLAYOUT; 3718 if (recallp != NULL) { 3719 free(recallp, M_NFSLAYRECALL); 3720 recallp = NULL; 3721 } 3722 break; 3723 case NFSV4OP_CBSEQUENCE: 3724 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3725 5 * NFSX_UNSIGNED); 3726 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3727 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3728 seqid = fxdr_unsigned(uint32_t, *tl++); 3729 slotid = fxdr_unsigned(uint32_t, *tl++); 3730 highslot = fxdr_unsigned(uint32_t, *tl++); 3731 cachethis = *tl++; 3732 /* Throw away the referring call stuff. */ 3733 clist = fxdr_unsigned(int, *tl); 3734 for (j = 0; j < clist; j++) { 3735 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3736 NFSX_UNSIGNED); 3737 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3738 rcalls = fxdr_unsigned(int, *tl); 3739 for (k = 0; k < rcalls; k++) { 3740 NFSM_DISSECT(tl, uint32_t *, 3741 2 * NFSX_UNSIGNED); 3742 } 3743 } 3744 NFSLOCKCLSTATE(); 3745 if (i == 0) { 3746 clp = nfscl_getclntsess(sessionid); 3747 if (clp == NULL) 3748 error = NFSERR_SERVERFAULT; 3749 } else 3750 error = NFSERR_SEQUENCEPOS; 3751 if (error == 0) { 3752 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3753 error = nfsv4_seqsession(seqid, slotid, 3754 highslot, tsep->nfsess_cbslots, &rep, 3755 tsep->nfsess_backslots); 3756 } 3757 NFSUNLOCKCLSTATE(); 3758 if (error == 0 || error == NFSERR_REPLYFROMCACHE) { 3759 gotseq_ok = 1; 3760 if (rep != NULL) { 3761 /* 3762 * Handle a reply for a retried 3763 * callback. The reply will be 3764 * re-inserted in the session cache 3765 * by the nfsv4_seqsess_cacherep() call 3766 * after out: 3767 */ 3768 KASSERT(error == NFSERR_REPLYFROMCACHE, 3769 ("cbsequence: non-NULL rep")); 3770 NFSCL_DEBUG(4, "Got cbretry\n"); 3771 m_freem(nd->nd_mreq); 3772 nd->nd_mreq = rep; 3773 rep = NULL; 3774 goto out; 3775 } 3776 NFSM_BUILD(tl, uint32_t *, 3777 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3778 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3779 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3780 *tl++ = txdr_unsigned(seqid); 3781 *tl++ = txdr_unsigned(slotid); 3782 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3783 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3784 } 3785 break; 3786 default: 3787 if (i == 0 && minorvers != NFSV4_MINORVERSION) 3788 error = NFSERR_OPNOTINSESS; 3789 else { 3790 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3791 error = NFSERR_NOTSUPP; 3792 } 3793 break; 3794 } 3795 if (error) { 3796 if (error == EBADRPC || error == NFSERR_BADXDR) { 3797 nd->nd_repstat = NFSERR_BADXDR; 3798 } else { 3799 nd->nd_repstat = error; 3800 } 3801 error = 0; 3802 } 3803 retops++; 3804 if (nd->nd_repstat) { 3805 *repp = nfscl_errmap(nd, minorvers); 3806 break; 3807 } else 3808 *repp = 0; /* NFS4_OK */ 3809 } 3810 nfsmout: 3811 if (recallp != NULL) 3812 free(recallp, M_NFSLAYRECALL); 3813 if (error) { 3814 if (error == EBADRPC || error == NFSERR_BADXDR) 3815 nd->nd_repstat = NFSERR_BADXDR; 3816 else 3817 printf("nfsv4 comperr1=%d\n", error); 3818 } 3819 if (taglen == -1) { 3820 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3821 *tl++ = 0; 3822 *tl = 0; 3823 } else { 3824 *retopsp = txdr_unsigned(retops); 3825 } 3826 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3827 out: 3828 if (gotseq_ok != 0) { 3829 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3830 NFSLOCKCLSTATE(); 3831 clp = nfscl_getclntsess(sessionid); 3832 if (clp != NULL) { 3833 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3834 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3835 NFSERR_OK, &rep); 3836 NFSUNLOCKCLSTATE(); 3837 } else { 3838 NFSUNLOCKCLSTATE(); 3839 m_freem(rep); 3840 } 3841 } 3842 } 3843 3844 /* 3845 * Generate the next cbident value. Basically just increment a static value 3846 * and then check that it isn't already in the list, if it has wrapped around. 3847 */ 3848 static u_int32_t 3849 nfscl_nextcbident(void) 3850 { 3851 struct nfsclclient *clp; 3852 int matched; 3853 static u_int32_t nextcbident = 0; 3854 static int haswrapped = 0; 3855 3856 nextcbident++; 3857 if (nextcbident == 0) 3858 haswrapped = 1; 3859 if (haswrapped) { 3860 /* 3861 * Search the clientid list for one already using this cbident. 3862 */ 3863 do { 3864 matched = 0; 3865 NFSLOCKCLSTATE(); 3866 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3867 if (clp->nfsc_cbident == nextcbident) { 3868 matched = 1; 3869 break; 3870 } 3871 } 3872 NFSUNLOCKCLSTATE(); 3873 if (matched == 1) 3874 nextcbident++; 3875 } while (matched); 3876 } 3877 return (nextcbident); 3878 } 3879 3880 /* 3881 * Get the mount point related to a given cbident or session and busy it. 3882 */ 3883 static mount_t 3884 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3885 struct nfsclclient **clpp) 3886 { 3887 struct nfsclclient *clp; 3888 mount_t mp; 3889 int error; 3890 struct nfsclsession *tsep; 3891 3892 *clpp = NULL; 3893 NFSLOCKCLSTATE(); 3894 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3895 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3896 if (minorvers == NFSV4_MINORVERSION) { 3897 if (clp->nfsc_cbident == cbident) 3898 break; 3899 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3900 NFSX_V4SESSIONID)) 3901 break; 3902 } 3903 if (clp == NULL) { 3904 NFSUNLOCKCLSTATE(); 3905 return (NULL); 3906 } 3907 mp = clp->nfsc_nmp->nm_mountp; 3908 vfs_ref(mp); 3909 NFSUNLOCKCLSTATE(); 3910 error = vfs_busy(mp, 0); 3911 vfs_rel(mp); 3912 if (error != 0) 3913 return (NULL); 3914 *clpp = clp; 3915 return (mp); 3916 } 3917 3918 /* 3919 * Get the clientid pointer related to a given cbident. 3920 */ 3921 static struct nfsclclient * 3922 nfscl_getclnt(u_int32_t cbident) 3923 { 3924 struct nfsclclient *clp; 3925 3926 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3927 if (clp->nfsc_cbident == cbident) 3928 break; 3929 return (clp); 3930 } 3931 3932 /* 3933 * Get the clientid pointer related to a given sessionid. 3934 */ 3935 static struct nfsclclient * 3936 nfscl_getclntsess(uint8_t *sessionid) 3937 { 3938 struct nfsclclient *clp; 3939 struct nfsclsession *tsep; 3940 3941 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3942 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3943 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3944 NFSX_V4SESSIONID)) 3945 break; 3946 } 3947 return (clp); 3948 } 3949 3950 /* 3951 * Search for a lock conflict locally on the client. A conflict occurs if 3952 * - not same owner and overlapping byte range and at least one of them is 3953 * a write lock or this is an unlock. 3954 */ 3955 static int 3956 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3957 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3958 struct nfscllock **lopp) 3959 { 3960 struct nfsclopen *op; 3961 int ret; 3962 3963 if (dp != NULL) { 3964 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3965 if (ret) 3966 return (ret); 3967 } 3968 LIST_FOREACH(op, NFSCLOPENHASH(clp, fhp, fhlen), nfso_hash) { 3969 if (op->nfso_fhlen == fhlen && 3970 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3971 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3972 own, lopp); 3973 if (ret) 3974 return (ret); 3975 } 3976 } 3977 return (0); 3978 } 3979 3980 static int 3981 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3982 u_int8_t *own, struct nfscllock **lopp) 3983 { 3984 struct nfscllockowner *lp; 3985 struct nfscllock *lop; 3986 3987 LIST_FOREACH(lp, lhp, nfsl_list) { 3988 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3989 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3990 if (lop->nfslo_first >= nlop->nfslo_end) 3991 break; 3992 if (lop->nfslo_end <= nlop->nfslo_first) 3993 continue; 3994 if (lop->nfslo_type == F_WRLCK || 3995 nlop->nfslo_type == F_WRLCK || 3996 nlop->nfslo_type == F_UNLCK) { 3997 if (lopp != NULL) 3998 *lopp = lop; 3999 return (NFSERR_DENIED); 4000 } 4001 } 4002 } 4003 } 4004 return (0); 4005 } 4006 4007 /* 4008 * Check for a local conflicting lock. 4009 */ 4010 int 4011 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 4012 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 4013 { 4014 struct nfscllock *lop, nlck; 4015 struct nfscldeleg *dp; 4016 struct nfsnode *np; 4017 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 4018 int error; 4019 4020 nlck.nfslo_type = fl->l_type; 4021 nlck.nfslo_first = off; 4022 if (len == NFS64BITSSET) { 4023 nlck.nfslo_end = NFS64BITSSET; 4024 } else { 4025 nlck.nfslo_end = off + len; 4026 if (nlck.nfslo_end <= nlck.nfslo_first) 4027 return (NFSERR_INVAL); 4028 } 4029 np = VTONFS(vp); 4030 nfscl_filllockowner(id, own, flags); 4031 NFSLOCKCLSTATE(); 4032 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4033 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 4034 &nlck, own, dp, &lop); 4035 if (error != 0) { 4036 fl->l_whence = SEEK_SET; 4037 fl->l_start = lop->nfslo_first; 4038 if (lop->nfslo_end == NFS64BITSSET) 4039 fl->l_len = 0; 4040 else 4041 fl->l_len = lop->nfslo_end - lop->nfslo_first; 4042 fl->l_pid = (pid_t)0; 4043 fl->l_type = lop->nfslo_type; 4044 error = -1; /* no RPC required */ 4045 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 4046 fl->l_type == F_RDLCK)) { 4047 /* 4048 * The delegation ensures that there isn't a conflicting 4049 * lock on the server, so return -1 to indicate an RPC 4050 * isn't required. 4051 */ 4052 fl->l_type = F_UNLCK; 4053 error = -1; 4054 } 4055 NFSUNLOCKCLSTATE(); 4056 return (error); 4057 } 4058 4059 /* 4060 * Handle Recall of a delegation. 4061 * The clp must be exclusive locked when this is called. 4062 */ 4063 static int 4064 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 4065 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 4066 int called_from_renewthread, vnode_t *vpp) 4067 { 4068 struct nfsclowner *owp, *lowp, *nowp; 4069 struct nfsclopen *op, *lop; 4070 struct nfscllockowner *lp; 4071 struct nfscllock *lckp; 4072 struct nfsnode *np; 4073 int error = 0, ret; 4074 4075 if (vp == NULL) { 4076 KASSERT(vpp != NULL, ("nfscl_recalldeleg: vpp NULL")); 4077 *vpp = NULL; 4078 /* 4079 * First, get a vnode for the file. This is needed to do RPCs. 4080 */ 4081 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 4082 dp->nfsdl_fhlen, p, &np); 4083 if (ret) { 4084 /* 4085 * File isn't open, so nothing to move over to the 4086 * server. 4087 */ 4088 return (0); 4089 } 4090 vp = NFSTOV(np); 4091 *vpp = vp; 4092 } else { 4093 np = VTONFS(vp); 4094 } 4095 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 4096 4097 /* 4098 * Ok, if it's a write delegation, flush data to the server, so 4099 * that close/open consistency is retained. 4100 */ 4101 ret = 0; 4102 NFSLOCKNODE(np); 4103 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 4104 np->n_flag |= NDELEGRECALL; 4105 NFSUNLOCKNODE(np); 4106 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread); 4107 NFSLOCKNODE(np); 4108 np->n_flag &= ~NDELEGRECALL; 4109 } 4110 NFSINVALATTRCACHE(np); 4111 NFSUNLOCKNODE(np); 4112 if (ret == EIO && called_from_renewthread != 0) { 4113 /* 4114 * If the flush failed with EIO for the renew thread, 4115 * return now, so that the dirty buffer will be flushed 4116 * later. 4117 */ 4118 return (ret); 4119 } 4120 4121 /* 4122 * Now, for each openowner with opens issued locally, move them 4123 * over to state against the server. 4124 */ 4125 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 4126 lop = LIST_FIRST(&lowp->nfsow_open); 4127 if (lop != NULL) { 4128 if (LIST_NEXT(lop, nfso_list) != NULL) 4129 panic("nfsdlg mult opens"); 4130 /* 4131 * Look for the same openowner against the server. 4132 */ 4133 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 4134 if (!NFSBCMP(lowp->nfsow_owner, 4135 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 4136 newnfs_copycred(&dp->nfsdl_cred, cred); 4137 ret = nfscl_moveopen(vp, clp, nmp, lop, 4138 owp, dp, cred, p); 4139 if (ret == NFSERR_STALECLIENTID || 4140 ret == NFSERR_STALEDONTRECOVER || 4141 ret == NFSERR_BADSESSION) 4142 return (ret); 4143 if (ret) { 4144 nfscl_freeopen(lop, 1); 4145 if (!error) 4146 error = ret; 4147 } 4148 break; 4149 } 4150 } 4151 4152 /* 4153 * If no openowner found, create one and get an open 4154 * for it. 4155 */ 4156 if (owp == NULL) { 4157 nowp = malloc( 4158 sizeof (struct nfsclowner), M_NFSCLOWNER, 4159 M_WAITOK); 4160 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 4161 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 4162 dp->nfsdl_fhlen, NULL, NULL); 4163 newnfs_copycred(&dp->nfsdl_cred, cred); 4164 ret = nfscl_moveopen(vp, clp, nmp, lop, 4165 owp, dp, cred, p); 4166 if (ret) { 4167 nfscl_freeopenowner(owp, 0); 4168 if (ret == NFSERR_STALECLIENTID || 4169 ret == NFSERR_STALEDONTRECOVER || 4170 ret == NFSERR_BADSESSION) 4171 return (ret); 4172 if (ret) { 4173 nfscl_freeopen(lop, 1); 4174 if (!error) 4175 error = ret; 4176 } 4177 } 4178 } 4179 } 4180 } 4181 4182 /* 4183 * Now, get byte range locks for any locks done locally. 4184 */ 4185 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4186 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 4187 newnfs_copycred(&dp->nfsdl_cred, cred); 4188 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 4189 if (ret == NFSERR_STALESTATEID || 4190 ret == NFSERR_STALEDONTRECOVER || 4191 ret == NFSERR_STALECLIENTID || 4192 ret == NFSERR_BADSESSION) 4193 return (ret); 4194 if (ret && !error) 4195 error = ret; 4196 } 4197 } 4198 return (error); 4199 } 4200 4201 /* 4202 * Move a locally issued open over to an owner on the state list. 4203 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 4204 * returns with it unlocked. 4205 */ 4206 static int 4207 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4208 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 4209 struct ucred *cred, NFSPROC_T *p) 4210 { 4211 struct nfsclopen *op, *nop; 4212 struct nfscldeleg *ndp; 4213 struct nfsnode *np; 4214 int error = 0, newone; 4215 4216 /* 4217 * First, look for an appropriate open, If found, just increment the 4218 * opencnt in it. 4219 */ 4220 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 4221 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 4222 op->nfso_fhlen == lop->nfso_fhlen && 4223 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 4224 op->nfso_opencnt += lop->nfso_opencnt; 4225 nfscl_freeopen(lop, 1); 4226 return (0); 4227 } 4228 } 4229 4230 /* No appropriate open, so we have to do one against the server. */ 4231 np = VTONFS(vp); 4232 nop = malloc(sizeof (struct nfsclopen) + 4233 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 4234 nop->nfso_hash.le_prev = NULL; 4235 newone = 0; 4236 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 4237 lop->nfso_fh, lop->nfso_fhlen, cred, &newone); 4238 ndp = dp; 4239 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 4240 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 4241 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 4242 if (error) { 4243 if (newone) 4244 nfscl_freeopen(op, 0); 4245 } else { 4246 op->nfso_mode |= lop->nfso_mode; 4247 op->nfso_opencnt += lop->nfso_opencnt; 4248 nfscl_freeopen(lop, 1); 4249 } 4250 if (nop != NULL) 4251 free(nop, M_NFSCLOPEN); 4252 if (ndp != NULL) { 4253 /* 4254 * What should I do with the returned delegation, since the 4255 * delegation is being recalled? For now, just printf and 4256 * through it away. 4257 */ 4258 printf("Moveopen returned deleg\n"); 4259 free(ndp, M_NFSCLDELEG); 4260 } 4261 return (error); 4262 } 4263 4264 /* 4265 * Recall all delegations on this client. 4266 */ 4267 static void 4268 nfscl_totalrecall(struct nfsclclient *clp) 4269 { 4270 struct nfscldeleg *dp; 4271 4272 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4273 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4274 dp->nfsdl_flags |= NFSCLDL_RECALL; 4275 } 4276 } 4277 4278 /* 4279 * Relock byte ranges. Called for delegation recall and state expiry. 4280 */ 4281 static int 4282 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4283 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4284 NFSPROC_T *p) 4285 { 4286 struct nfscllockowner *nlp; 4287 struct nfsfh *nfhp; 4288 u_int64_t off, len; 4289 int error, newone, donelocally; 4290 4291 off = lop->nfslo_first; 4292 len = lop->nfslo_end - lop->nfslo_first; 4293 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4294 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4295 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4296 if (error || donelocally) 4297 return (error); 4298 nfhp = VTONFS(vp)->n_fhp; 4299 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4300 nfhp->nfh_len, nlp, newone, 0, off, 4301 len, lop->nfslo_type, cred, p); 4302 if (error) 4303 nfscl_freelockowner(nlp, 0); 4304 return (error); 4305 } 4306 4307 /* 4308 * Called to re-open a file. Basically get a vnode for the file handle 4309 * and then call nfsrpc_openrpc() to do the rest. 4310 */ 4311 static int 4312 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4313 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4314 struct ucred *cred, NFSPROC_T *p) 4315 { 4316 struct nfsnode *np; 4317 vnode_t vp; 4318 int error; 4319 4320 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4321 if (error) 4322 return (error); 4323 vp = NFSTOV(np); 4324 if (np->n_v4 != NULL) { 4325 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4326 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4327 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4328 cred, p); 4329 } else { 4330 error = EINVAL; 4331 } 4332 vrele(vp); 4333 return (error); 4334 } 4335 4336 /* 4337 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4338 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4339 * fail. 4340 */ 4341 static int 4342 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4343 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4344 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4345 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4346 { 4347 int error; 4348 4349 do { 4350 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4351 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4352 0, 0); 4353 if (error == NFSERR_DELAY) 4354 (void) nfs_catnap(PZERO, error, "nfstryop"); 4355 } while (error == NFSERR_DELAY); 4356 if (error == EAUTH || error == EACCES) { 4357 /* Try again using system credentials */ 4358 newnfs_setroot(cred); 4359 do { 4360 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4361 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4362 delegtype, cred, p, 1, 0); 4363 if (error == NFSERR_DELAY) 4364 (void) nfs_catnap(PZERO, error, "nfstryop"); 4365 } while (error == NFSERR_DELAY); 4366 } 4367 return (error); 4368 } 4369 4370 /* 4371 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4372 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4373 * cred don't work. 4374 */ 4375 static int 4376 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4377 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4378 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4379 { 4380 struct nfsrv_descript nfsd, *nd = &nfsd; 4381 int error; 4382 4383 do { 4384 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4385 reclaim, off, len, type, cred, p, 0); 4386 if (!error && nd->nd_repstat == NFSERR_DELAY) 4387 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4388 "nfstrylck"); 4389 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4390 if (!error) 4391 error = nd->nd_repstat; 4392 if (error == EAUTH || error == EACCES) { 4393 /* Try again using root credentials */ 4394 newnfs_setroot(cred); 4395 do { 4396 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4397 newone, reclaim, off, len, type, cred, p, 1); 4398 if (!error && nd->nd_repstat == NFSERR_DELAY) 4399 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4400 "nfstrylck"); 4401 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4402 if (!error) 4403 error = nd->nd_repstat; 4404 } 4405 return (error); 4406 } 4407 4408 /* 4409 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4410 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4411 * credentials fail. 4412 */ 4413 static int 4414 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4415 struct nfsmount *nmp, NFSPROC_T *p) 4416 { 4417 int error; 4418 4419 do { 4420 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4421 if (error == NFSERR_DELAY) 4422 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4423 } while (error == NFSERR_DELAY); 4424 if (error == EAUTH || error == EACCES) { 4425 /* Try again using system credentials */ 4426 newnfs_setroot(cred); 4427 do { 4428 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4429 if (error == NFSERR_DELAY) 4430 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4431 } while (error == NFSERR_DELAY); 4432 } 4433 return (error); 4434 } 4435 4436 /* 4437 * Try a close against the server. Just call nfsrpc_closerpc(), 4438 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4439 * credentials fail. 4440 */ 4441 int 4442 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4443 struct nfsmount *nmp, NFSPROC_T *p) 4444 { 4445 struct nfsrv_descript nfsd, *nd = &nfsd; 4446 int error; 4447 4448 do { 4449 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4450 if (error == NFSERR_DELAY) 4451 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4452 } while (error == NFSERR_DELAY); 4453 if (error == EAUTH || error == EACCES) { 4454 /* Try again using system credentials */ 4455 newnfs_setroot(cred); 4456 do { 4457 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4458 if (error == NFSERR_DELAY) 4459 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4460 } while (error == NFSERR_DELAY); 4461 } 4462 return (error); 4463 } 4464 4465 /* 4466 * Decide if a delegation on a file permits close without flushing writes 4467 * to the server. This might be a big performance win in some environments. 4468 * (Not useful until the client does caching on local stable storage.) 4469 */ 4470 int 4471 nfscl_mustflush(vnode_t vp) 4472 { 4473 struct nfsclclient *clp; 4474 struct nfscldeleg *dp; 4475 struct nfsnode *np; 4476 struct nfsmount *nmp; 4477 4478 np = VTONFS(vp); 4479 nmp = VFSTONFS(vp->v_mount); 4480 if (!NFSHASNFSV4(nmp)) 4481 return (1); 4482 NFSLOCKCLSTATE(); 4483 clp = nfscl_findcl(nmp); 4484 if (clp == NULL) { 4485 NFSUNLOCKCLSTATE(); 4486 return (1); 4487 } 4488 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4489 if (dp != NULL && (dp->nfsdl_flags & 4490 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4491 NFSCLDL_WRITE && 4492 (dp->nfsdl_sizelimit >= np->n_size || 4493 !NFSHASSTRICT3530(nmp))) { 4494 NFSUNLOCKCLSTATE(); 4495 return (0); 4496 } 4497 NFSUNLOCKCLSTATE(); 4498 return (1); 4499 } 4500 4501 /* 4502 * See if a (write) delegation exists for this file. 4503 */ 4504 int 4505 nfscl_nodeleg(vnode_t vp, int writedeleg) 4506 { 4507 struct nfsclclient *clp; 4508 struct nfscldeleg *dp; 4509 struct nfsnode *np; 4510 struct nfsmount *nmp; 4511 4512 np = VTONFS(vp); 4513 nmp = VFSTONFS(vp->v_mount); 4514 if (!NFSHASNFSV4(nmp)) 4515 return (1); 4516 NFSLOCKMNT(nmp); 4517 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4518 NFSUNLOCKMNT(nmp); 4519 return (1); 4520 } 4521 NFSUNLOCKMNT(nmp); 4522 NFSLOCKCLSTATE(); 4523 clp = nfscl_findcl(nmp); 4524 if (clp == NULL) { 4525 NFSUNLOCKCLSTATE(); 4526 return (1); 4527 } 4528 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4529 if (dp != NULL && 4530 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4531 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4532 NFSCLDL_WRITE)) { 4533 NFSUNLOCKCLSTATE(); 4534 return (0); 4535 } 4536 NFSUNLOCKCLSTATE(); 4537 return (1); 4538 } 4539 4540 /* 4541 * Look for an associated delegation that should be DelegReturned. 4542 */ 4543 int 4544 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4545 { 4546 struct nfsclclient *clp; 4547 struct nfscldeleg *dp; 4548 struct nfsclowner *owp; 4549 struct nfscllockowner *lp; 4550 struct nfsmount *nmp; 4551 struct ucred *cred; 4552 struct nfsnode *np; 4553 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4554 4555 nmp = VFSTONFS(vp->v_mount); 4556 np = VTONFS(vp); 4557 NFSLOCKCLSTATE(); 4558 /* 4559 * Loop around waiting for: 4560 * - outstanding I/O operations on delegations to complete 4561 * - for a delegation on vp that has state, lock the client and 4562 * do a recall 4563 * - return delegation with no state 4564 */ 4565 while (1) { 4566 clp = nfscl_findcl(nmp); 4567 if (clp == NULL) { 4568 NFSUNLOCKCLSTATE(); 4569 return (retcnt); 4570 } 4571 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4572 np->n_fhp->nfh_len); 4573 if (dp != NULL) { 4574 /* 4575 * Wait for outstanding I/O ops to be done. 4576 */ 4577 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4578 if (igotlock) { 4579 nfsv4_unlock(&clp->nfsc_lock, 0); 4580 igotlock = 0; 4581 } 4582 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4583 (void) nfsmsleep(&dp->nfsdl_rwlock, 4584 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4585 continue; 4586 } 4587 needsrecall = 0; 4588 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4589 if (!LIST_EMPTY(&owp->nfsow_open)) { 4590 needsrecall = 1; 4591 break; 4592 } 4593 } 4594 if (!needsrecall) { 4595 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4596 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4597 needsrecall = 1; 4598 break; 4599 } 4600 } 4601 } 4602 if (needsrecall && !triedrecall) { 4603 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4604 islept = 0; 4605 while (!igotlock) { 4606 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4607 &islept, NFSCLSTATEMUTEXPTR, NULL); 4608 if (islept) 4609 break; 4610 } 4611 if (islept) 4612 continue; 4613 NFSUNLOCKCLSTATE(); 4614 cred = newnfs_getcred(); 4615 newnfs_copycred(&dp->nfsdl_cred, cred); 4616 nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0, NULL); 4617 NFSFREECRED(cred); 4618 triedrecall = 1; 4619 NFSLOCKCLSTATE(); 4620 nfsv4_unlock(&clp->nfsc_lock, 0); 4621 igotlock = 0; 4622 continue; 4623 } 4624 *stp = dp->nfsdl_stateid; 4625 retcnt = 1; 4626 nfscl_cleandeleg(dp); 4627 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 4628 } 4629 if (igotlock) 4630 nfsv4_unlock(&clp->nfsc_lock, 0); 4631 NFSUNLOCKCLSTATE(); 4632 return (retcnt); 4633 } 4634 } 4635 4636 /* 4637 * Look for associated delegation(s) that should be DelegReturned. 4638 */ 4639 int 4640 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4641 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4642 { 4643 struct nfsclclient *clp; 4644 struct nfscldeleg *dp; 4645 struct nfsclowner *owp; 4646 struct nfscllockowner *lp; 4647 struct nfsmount *nmp; 4648 struct ucred *cred; 4649 struct nfsnode *np; 4650 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4651 4652 nmp = VFSTONFS(fvp->v_mount); 4653 *gotfdp = 0; 4654 *gottdp = 0; 4655 NFSLOCKCLSTATE(); 4656 /* 4657 * Loop around waiting for: 4658 * - outstanding I/O operations on delegations to complete 4659 * - for a delegation on fvp that has state, lock the client and 4660 * do a recall 4661 * - return delegation(s) with no state. 4662 */ 4663 while (1) { 4664 clp = nfscl_findcl(nmp); 4665 if (clp == NULL) { 4666 NFSUNLOCKCLSTATE(); 4667 return (retcnt); 4668 } 4669 np = VTONFS(fvp); 4670 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4671 np->n_fhp->nfh_len); 4672 if (dp != NULL && *gotfdp == 0) { 4673 /* 4674 * Wait for outstanding I/O ops to be done. 4675 */ 4676 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4677 if (igotlock) { 4678 nfsv4_unlock(&clp->nfsc_lock, 0); 4679 igotlock = 0; 4680 } 4681 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4682 (void) nfsmsleep(&dp->nfsdl_rwlock, 4683 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4684 continue; 4685 } 4686 needsrecall = 0; 4687 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4688 if (!LIST_EMPTY(&owp->nfsow_open)) { 4689 needsrecall = 1; 4690 break; 4691 } 4692 } 4693 if (!needsrecall) { 4694 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4695 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4696 needsrecall = 1; 4697 break; 4698 } 4699 } 4700 } 4701 if (needsrecall && !triedrecall) { 4702 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4703 islept = 0; 4704 while (!igotlock) { 4705 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4706 &islept, NFSCLSTATEMUTEXPTR, NULL); 4707 if (islept) 4708 break; 4709 } 4710 if (islept) 4711 continue; 4712 NFSUNLOCKCLSTATE(); 4713 cred = newnfs_getcred(); 4714 newnfs_copycred(&dp->nfsdl_cred, cred); 4715 nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0, NULL); 4716 NFSFREECRED(cred); 4717 triedrecall = 1; 4718 NFSLOCKCLSTATE(); 4719 nfsv4_unlock(&clp->nfsc_lock, 0); 4720 igotlock = 0; 4721 continue; 4722 } 4723 *fstp = dp->nfsdl_stateid; 4724 retcnt++; 4725 *gotfdp = 1; 4726 nfscl_cleandeleg(dp); 4727 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 4728 } 4729 if (igotlock) { 4730 nfsv4_unlock(&clp->nfsc_lock, 0); 4731 igotlock = 0; 4732 } 4733 if (tvp != NULL) { 4734 np = VTONFS(tvp); 4735 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4736 np->n_fhp->nfh_len); 4737 if (dp != NULL && *gottdp == 0) { 4738 /* 4739 * Wait for outstanding I/O ops to be done. 4740 */ 4741 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4742 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4743 (void) nfsmsleep(&dp->nfsdl_rwlock, 4744 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4745 continue; 4746 } 4747 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4748 if (!LIST_EMPTY(&owp->nfsow_open)) { 4749 NFSUNLOCKCLSTATE(); 4750 return (retcnt); 4751 } 4752 } 4753 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4754 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4755 NFSUNLOCKCLSTATE(); 4756 return (retcnt); 4757 } 4758 } 4759 *tstp = dp->nfsdl_stateid; 4760 retcnt++; 4761 *gottdp = 1; 4762 nfscl_cleandeleg(dp); 4763 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 4764 } 4765 } 4766 NFSUNLOCKCLSTATE(); 4767 return (retcnt); 4768 } 4769 } 4770 4771 /* 4772 * Get a reference on the clientid associated with the mount point. 4773 * Return 1 if success, 0 otherwise. 4774 */ 4775 int 4776 nfscl_getref(struct nfsmount *nmp) 4777 { 4778 struct nfsclclient *clp; 4779 4780 NFSLOCKCLSTATE(); 4781 clp = nfscl_findcl(nmp); 4782 if (clp == NULL) { 4783 NFSUNLOCKCLSTATE(); 4784 return (0); 4785 } 4786 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4787 NFSUNLOCKCLSTATE(); 4788 return (1); 4789 } 4790 4791 /* 4792 * Release a reference on a clientid acquired with the above call. 4793 */ 4794 void 4795 nfscl_relref(struct nfsmount *nmp) 4796 { 4797 struct nfsclclient *clp; 4798 4799 NFSLOCKCLSTATE(); 4800 clp = nfscl_findcl(nmp); 4801 if (clp == NULL) { 4802 NFSUNLOCKCLSTATE(); 4803 return; 4804 } 4805 nfsv4_relref(&clp->nfsc_lock); 4806 NFSUNLOCKCLSTATE(); 4807 } 4808 4809 /* 4810 * Save the size attribute in the delegation, since the nfsnode 4811 * is going away. 4812 */ 4813 void 4814 nfscl_reclaimnode(vnode_t vp) 4815 { 4816 struct nfsclclient *clp; 4817 struct nfscldeleg *dp; 4818 struct nfsnode *np = VTONFS(vp); 4819 struct nfsmount *nmp; 4820 4821 nmp = VFSTONFS(vp->v_mount); 4822 if (!NFSHASNFSV4(nmp)) 4823 return; 4824 NFSLOCKCLSTATE(); 4825 clp = nfscl_findcl(nmp); 4826 if (clp == NULL) { 4827 NFSUNLOCKCLSTATE(); 4828 return; 4829 } 4830 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4831 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4832 dp->nfsdl_size = np->n_size; 4833 NFSUNLOCKCLSTATE(); 4834 } 4835 4836 /* 4837 * Get the saved size attribute in the delegation, since it is a 4838 * newly allocated nfsnode. 4839 */ 4840 void 4841 nfscl_newnode(vnode_t vp) 4842 { 4843 struct nfsclclient *clp; 4844 struct nfscldeleg *dp; 4845 struct nfsnode *np = VTONFS(vp); 4846 struct nfsmount *nmp; 4847 4848 nmp = VFSTONFS(vp->v_mount); 4849 if (!NFSHASNFSV4(nmp)) 4850 return; 4851 NFSLOCKCLSTATE(); 4852 clp = nfscl_findcl(nmp); 4853 if (clp == NULL) { 4854 NFSUNLOCKCLSTATE(); 4855 return; 4856 } 4857 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4858 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4859 np->n_size = dp->nfsdl_size; 4860 NFSUNLOCKCLSTATE(); 4861 } 4862 4863 /* 4864 * If there is a valid write delegation for this file, set the modtime 4865 * to the local clock time. 4866 */ 4867 void 4868 nfscl_delegmodtime(vnode_t vp) 4869 { 4870 struct nfsclclient *clp; 4871 struct nfscldeleg *dp; 4872 struct nfsnode *np = VTONFS(vp); 4873 struct nfsmount *nmp; 4874 4875 nmp = VFSTONFS(vp->v_mount); 4876 if (!NFSHASNFSV4(nmp)) 4877 return; 4878 NFSLOCKMNT(nmp); 4879 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4880 NFSUNLOCKMNT(nmp); 4881 return; 4882 } 4883 NFSUNLOCKMNT(nmp); 4884 NFSLOCKCLSTATE(); 4885 clp = nfscl_findcl(nmp); 4886 if (clp == NULL) { 4887 NFSUNLOCKCLSTATE(); 4888 return; 4889 } 4890 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4891 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4892 nanotime(&dp->nfsdl_modtime); 4893 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4894 } 4895 NFSUNLOCKCLSTATE(); 4896 } 4897 4898 /* 4899 * If there is a valid write delegation for this file with a modtime set, 4900 * put that modtime in mtime. 4901 */ 4902 void 4903 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4904 { 4905 struct nfsclclient *clp; 4906 struct nfscldeleg *dp; 4907 struct nfsnode *np = VTONFS(vp); 4908 struct nfsmount *nmp; 4909 4910 nmp = VFSTONFS(vp->v_mount); 4911 if (!NFSHASNFSV4(nmp)) 4912 return; 4913 NFSLOCKMNT(nmp); 4914 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4915 NFSUNLOCKMNT(nmp); 4916 return; 4917 } 4918 NFSUNLOCKMNT(nmp); 4919 NFSLOCKCLSTATE(); 4920 clp = nfscl_findcl(nmp); 4921 if (clp == NULL) { 4922 NFSUNLOCKCLSTATE(); 4923 return; 4924 } 4925 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4926 if (dp != NULL && 4927 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4928 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4929 *mtime = dp->nfsdl_modtime; 4930 NFSUNLOCKCLSTATE(); 4931 } 4932 4933 static int 4934 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4935 { 4936 short *defaulterrp, *errp; 4937 4938 if (!nd->nd_repstat) 4939 return (0); 4940 if (nd->nd_procnum == NFSPROC_NOOP) 4941 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4942 if (nd->nd_repstat == EBADRPC) 4943 return (txdr_unsigned(NFSERR_BADXDR)); 4944 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4945 nd->nd_repstat == NFSERR_OPILLEGAL) 4946 return (txdr_unsigned(nd->nd_repstat)); 4947 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4948 minorvers > NFSV4_MINORVERSION) { 4949 /* NFSv4.n error. */ 4950 return (txdr_unsigned(nd->nd_repstat)); 4951 } 4952 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4953 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4954 else 4955 return (txdr_unsigned(nd->nd_repstat)); 4956 while (*++errp) 4957 if (*errp == (short)nd->nd_repstat) 4958 return (txdr_unsigned(nd->nd_repstat)); 4959 return (txdr_unsigned(*defaulterrp)); 4960 } 4961 4962 /* 4963 * Called to find/add a layout to a client. 4964 * This function returns the layout with a refcnt (shared lock) upon 4965 * success (returns 0) or with no lock/refcnt on the layout when an 4966 * error is returned. 4967 * If a layout is passed in via lypp, it is locked (exclusively locked). 4968 */ 4969 int 4970 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4971 nfsv4stateid_t *stateidp, int layouttype, int retonclose, 4972 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4973 struct ucred *cred, NFSPROC_T *p) 4974 { 4975 struct nfsclclient *clp; 4976 struct nfscllayout *lyp, *tlyp; 4977 struct nfsclflayout *flp; 4978 struct nfsnode *np = VTONFS(vp); 4979 mount_t mp; 4980 int layout_passed_in; 4981 4982 mp = nmp->nm_mountp; 4983 layout_passed_in = 1; 4984 tlyp = NULL; 4985 lyp = *lypp; 4986 if (lyp == NULL) { 4987 layout_passed_in = 0; 4988 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4989 M_WAITOK | M_ZERO); 4990 } 4991 4992 NFSLOCKCLSTATE(); 4993 clp = nmp->nm_clp; 4994 if (clp == NULL) { 4995 if (layout_passed_in != 0) 4996 nfsv4_unlock(&lyp->nfsly_lock, 0); 4997 NFSUNLOCKCLSTATE(); 4998 if (tlyp != NULL) 4999 free(tlyp, M_NFSLAYOUT); 5000 return (EPERM); 5001 } 5002 if (lyp == NULL) { 5003 /* 5004 * Although no lyp was passed in, another thread might have 5005 * allocated one. If one is found, just increment it's ref 5006 * count and return it. 5007 */ 5008 lyp = nfscl_findlayout(clp, fhp, fhlen); 5009 if (lyp == NULL) { 5010 lyp = tlyp; 5011 tlyp = NULL; 5012 lyp->nfsly_stateid.seqid = stateidp->seqid; 5013 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 5014 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 5015 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 5016 lyp->nfsly_lastbyte = 0; 5017 LIST_INIT(&lyp->nfsly_flayread); 5018 LIST_INIT(&lyp->nfsly_flayrw); 5019 LIST_INIT(&lyp->nfsly_recall); 5020 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 5021 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 5022 lyp->nfsly_clp = clp; 5023 if (layouttype == NFSLAYOUT_FLEXFILE) 5024 lyp->nfsly_flags = NFSLY_FLEXFILE; 5025 else 5026 lyp->nfsly_flags = NFSLY_FILES; 5027 if (retonclose != 0) 5028 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 5029 lyp->nfsly_fhlen = fhlen; 5030 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 5031 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 5032 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 5033 nfsly_hash); 5034 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 5035 nfscl_layoutcnt++; 5036 } else { 5037 if (retonclose != 0) 5038 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 5039 if (stateidp->seqid > lyp->nfsly_stateid.seqid) 5040 lyp->nfsly_stateid.seqid = stateidp->seqid; 5041 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 5042 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 5043 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 5044 } 5045 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5046 if (NFSCL_FORCEDISM(mp)) { 5047 NFSUNLOCKCLSTATE(); 5048 if (tlyp != NULL) 5049 free(tlyp, M_NFSLAYOUT); 5050 return (EPERM); 5051 } 5052 *lypp = lyp; 5053 } else if (stateidp->seqid > lyp->nfsly_stateid.seqid) 5054 lyp->nfsly_stateid.seqid = stateidp->seqid; 5055 5056 /* Merge the new list of File Layouts into the list. */ 5057 flp = LIST_FIRST(fhlp); 5058 if (flp != NULL) { 5059 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 5060 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 5061 else 5062 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 5063 } 5064 if (layout_passed_in != 0) 5065 nfsv4_unlock(&lyp->nfsly_lock, 1); 5066 NFSUNLOCKCLSTATE(); 5067 if (tlyp != NULL) 5068 free(tlyp, M_NFSLAYOUT); 5069 return (0); 5070 } 5071 5072 /* 5073 * Search for a layout by MDS file handle. 5074 * If one is found, it is returned with a refcnt (shared lock) iff 5075 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 5076 * returned NULL. 5077 */ 5078 struct nfscllayout * 5079 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 5080 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 5081 { 5082 struct nfscllayout *lyp; 5083 mount_t mp; 5084 int error, igotlock; 5085 5086 mp = clp->nfsc_nmp->nm_mountp; 5087 *recalledp = 0; 5088 *retflpp = NULL; 5089 NFSLOCKCLSTATE(); 5090 lyp = nfscl_findlayout(clp, fhp, fhlen); 5091 if (lyp != NULL) { 5092 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 5093 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 5094 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 5095 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 5096 error = nfscl_findlayoutforio(lyp, off, 5097 NFSV4OPEN_ACCESSREAD, retflpp); 5098 if (error == 0) 5099 nfsv4_getref(&lyp->nfsly_lock, NULL, 5100 NFSCLSTATEMUTEXPTR, mp); 5101 else { 5102 do { 5103 igotlock = nfsv4_lock(&lyp->nfsly_lock, 5104 1, NULL, NFSCLSTATEMUTEXPTR, mp); 5105 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp)); 5106 *retflpp = NULL; 5107 } 5108 if (NFSCL_FORCEDISM(mp)) { 5109 lyp = NULL; 5110 *recalledp = 1; 5111 } 5112 } else { 5113 lyp = NULL; 5114 *recalledp = 1; 5115 } 5116 } 5117 NFSUNLOCKCLSTATE(); 5118 return (lyp); 5119 } 5120 5121 /* 5122 * Search for a layout by MDS file handle. If one is found, mark in to be 5123 * recalled, if it already marked "return on close". 5124 */ 5125 static void 5126 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp, 5127 int fhlen, struct nfsclrecalllayout **recallpp) 5128 { 5129 struct nfscllayout *lyp; 5130 uint32_t iomode; 5131 5132 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vp->v_mount)) || 5133 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 || 5134 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0) 5135 return; 5136 lyp = nfscl_findlayout(clp, fhp, fhlen); 5137 if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE | 5138 NFSLY_RECALL)) == NFSLY_RETONCLOSE) { 5139 iomode = 0; 5140 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 5141 iomode |= NFSLAYOUTIOMODE_READ; 5142 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 5143 iomode |= NFSLAYOUTIOMODE_RW; 5144 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 5145 0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL, 5146 *recallpp); 5147 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode); 5148 *recallpp = NULL; 5149 } 5150 } 5151 5152 /* 5153 * Mark the layout to be recalled and with an error. 5154 * Also, disable the dsp from further use. 5155 */ 5156 void 5157 nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp, 5158 struct nfscllayout *lyp, struct nfsclds *dsp) 5159 { 5160 struct nfsclrecalllayout *recallp; 5161 uint32_t iomode; 5162 5163 printf("DS being disabled, error=%d\n", stat); 5164 /* Set up the return of the layout. */ 5165 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 5166 iomode = 0; 5167 NFSLOCKCLSTATE(); 5168 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 5169 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 5170 iomode |= NFSLAYOUTIOMODE_READ; 5171 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 5172 iomode |= NFSLAYOUTIOMODE_RW; 5173 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 5174 0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op, 5175 dp->nfsdi_deviceid, recallp); 5176 NFSUNLOCKCLSTATE(); 5177 NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode); 5178 } else { 5179 NFSUNLOCKCLSTATE(); 5180 free(recallp, M_NFSLAYRECALL); 5181 } 5182 5183 /* And shut the TCP connection down. */ 5184 nfscl_cancelreqs(dsp); 5185 } 5186 5187 /* 5188 * Cancel all RPCs for this "dsp" by closing the connection. 5189 * Also, mark the session as defunct. 5190 * If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and 5191 * cannot be shut down. 5192 */ 5193 void 5194 nfscl_cancelreqs(struct nfsclds *dsp) 5195 { 5196 struct __rpc_client *cl; 5197 static int non_event; 5198 5199 NFSLOCKDS(dsp); 5200 if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 && 5201 dsp->nfsclds_sockp != NULL && 5202 dsp->nfsclds_sockp->nr_client != NULL) { 5203 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 5204 cl = dsp->nfsclds_sockp->nr_client; 5205 dsp->nfsclds_sess.nfsess_defunct = 1; 5206 NFSUNLOCKDS(dsp); 5207 CLNT_CLOSE(cl); 5208 /* 5209 * This 1sec sleep is done to reduce the number of reconnect 5210 * attempts made on the DS while it has failed. 5211 */ 5212 tsleep(&non_event, PVFS, "ndscls", hz); 5213 return; 5214 } 5215 NFSUNLOCKDS(dsp); 5216 } 5217 5218 /* 5219 * Dereference a layout. 5220 */ 5221 void 5222 nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 5223 { 5224 5225 NFSLOCKCLSTATE(); 5226 if (exclocked != 0) 5227 nfsv4_unlock(&lyp->nfsly_lock, 0); 5228 else 5229 nfsv4_relref(&lyp->nfsly_lock); 5230 NFSUNLOCKCLSTATE(); 5231 } 5232 5233 /* 5234 * Search for a devinfo by deviceid. If one is found, return it after 5235 * acquiring a reference count on it. 5236 */ 5237 struct nfscldevinfo * 5238 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 5239 struct nfscldevinfo *dip) 5240 { 5241 5242 NFSLOCKCLSTATE(); 5243 if (dip == NULL) 5244 dip = nfscl_finddevinfo(clp, deviceid); 5245 if (dip != NULL) 5246 dip->nfsdi_refcnt++; 5247 NFSUNLOCKCLSTATE(); 5248 return (dip); 5249 } 5250 5251 /* 5252 * Dereference a devinfo structure. 5253 */ 5254 static void 5255 nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 5256 { 5257 5258 dip->nfsdi_refcnt--; 5259 if (dip->nfsdi_refcnt == 0) 5260 wakeup(&dip->nfsdi_refcnt); 5261 } 5262 5263 /* 5264 * Dereference a devinfo structure. 5265 */ 5266 void 5267 nfscl_reldevinfo(struct nfscldevinfo *dip) 5268 { 5269 5270 NFSLOCKCLSTATE(); 5271 nfscl_reldevinfo_locked(dip); 5272 NFSUNLOCKCLSTATE(); 5273 } 5274 5275 /* 5276 * Find a layout for this file handle. Return NULL upon failure. 5277 */ 5278 static struct nfscllayout * 5279 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 5280 { 5281 struct nfscllayout *lyp; 5282 5283 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 5284 if (lyp->nfsly_fhlen == fhlen && 5285 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 5286 break; 5287 return (lyp); 5288 } 5289 5290 /* 5291 * Find a devinfo for this deviceid. Return NULL upon failure. 5292 */ 5293 static struct nfscldevinfo * 5294 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 5295 { 5296 struct nfscldevinfo *dip; 5297 5298 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 5299 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 5300 == 0) 5301 break; 5302 return (dip); 5303 } 5304 5305 /* 5306 * Merge the new file layout list into the main one, maintaining it in 5307 * increasing offset order. 5308 */ 5309 static void 5310 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 5311 struct nfsclflayouthead *newfhlp) 5312 { 5313 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 5314 5315 flp = LIST_FIRST(fhlp); 5316 prevflp = NULL; 5317 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 5318 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 5319 prevflp = flp; 5320 flp = LIST_NEXT(flp, nfsfl_list); 5321 } 5322 if (prevflp == NULL) 5323 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 5324 else 5325 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 5326 prevflp = nflp; 5327 } 5328 } 5329 5330 /* 5331 * Add this nfscldevinfo to the client, if it doesn't already exist. 5332 * This function consumes the structure pointed at by dip, if not NULL. 5333 */ 5334 int 5335 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind, 5336 struct nfsclflayout *flp) 5337 { 5338 struct nfsclclient *clp; 5339 struct nfscldevinfo *tdip; 5340 uint8_t *dev; 5341 5342 NFSLOCKCLSTATE(); 5343 clp = nmp->nm_clp; 5344 if (clp == NULL) { 5345 NFSUNLOCKCLSTATE(); 5346 if (dip != NULL) 5347 free(dip, M_NFSDEVINFO); 5348 return (ENODEV); 5349 } 5350 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5351 dev = flp->nfsfl_dev; 5352 else 5353 dev = flp->nfsfl_ffm[ind].dev; 5354 tdip = nfscl_finddevinfo(clp, dev); 5355 if (tdip != NULL) { 5356 tdip->nfsdi_layoutrefs++; 5357 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5358 flp->nfsfl_devp = tdip; 5359 else 5360 flp->nfsfl_ffm[ind].devp = tdip; 5361 nfscl_reldevinfo_locked(tdip); 5362 NFSUNLOCKCLSTATE(); 5363 if (dip != NULL) 5364 free(dip, M_NFSDEVINFO); 5365 return (0); 5366 } 5367 if (dip != NULL) { 5368 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5369 dip->nfsdi_layoutrefs = 1; 5370 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5371 flp->nfsfl_devp = dip; 5372 else 5373 flp->nfsfl_ffm[ind].devp = dip; 5374 } 5375 NFSUNLOCKCLSTATE(); 5376 if (dip == NULL) 5377 return (ENODEV); 5378 return (0); 5379 } 5380 5381 /* 5382 * Free up a layout structure and associated file layout structure(s). 5383 */ 5384 void 5385 nfscl_freelayout(struct nfscllayout *layp) 5386 { 5387 struct nfsclflayout *flp, *nflp; 5388 struct nfsclrecalllayout *rp, *nrp; 5389 5390 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5391 LIST_REMOVE(flp, nfsfl_list); 5392 nfscl_freeflayout(flp); 5393 } 5394 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5395 LIST_REMOVE(flp, nfsfl_list); 5396 nfscl_freeflayout(flp); 5397 } 5398 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5399 LIST_REMOVE(rp, nfsrecly_list); 5400 free(rp, M_NFSLAYRECALL); 5401 } 5402 nfscl_layoutcnt--; 5403 free(layp, M_NFSLAYOUT); 5404 } 5405 5406 /* 5407 * Free up a file layout structure. 5408 */ 5409 void 5410 nfscl_freeflayout(struct nfsclflayout *flp) 5411 { 5412 int i, j; 5413 5414 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) { 5415 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5416 free(flp->nfsfl_fh[i], M_NFSFH); 5417 if (flp->nfsfl_devp != NULL) 5418 flp->nfsfl_devp->nfsdi_layoutrefs--; 5419 } 5420 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0) 5421 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) { 5422 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++) 5423 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH); 5424 if (flp->nfsfl_ffm[i].devp != NULL) 5425 flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--; 5426 } 5427 free(flp, M_NFSFLAYOUT); 5428 } 5429 5430 /* 5431 * Free up a file layout devinfo structure. 5432 */ 5433 void 5434 nfscl_freedevinfo(struct nfscldevinfo *dip) 5435 { 5436 5437 free(dip, M_NFSDEVINFO); 5438 } 5439 5440 /* 5441 * Mark any layouts that match as recalled. 5442 */ 5443 static int 5444 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5445 uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op, 5446 char *devid, struct nfsclrecalllayout *recallp) 5447 { 5448 struct nfsclrecalllayout *rp, *orp; 5449 5450 recallp->nfsrecly_recalltype = recalltype; 5451 recallp->nfsrecly_iomode = iomode; 5452 recallp->nfsrecly_stateseqid = stateseqid; 5453 recallp->nfsrecly_off = off; 5454 recallp->nfsrecly_len = len; 5455 recallp->nfsrecly_stat = stat; 5456 recallp->nfsrecly_op = op; 5457 if (devid != NULL) 5458 NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID); 5459 /* 5460 * Order the list as file returns first, followed by fsid and any 5461 * returns, both in increasing stateseqid order. 5462 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5463 * (I'm not sure this is correct because I find RFC5661 confusing 5464 * on this, but hopefully it will work ok.) 5465 */ 5466 orp = NULL; 5467 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5468 orp = rp; 5469 if ((recalltype == NFSLAYOUTRETURN_FILE && 5470 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5471 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5472 (recalltype != NFSLAYOUTRETURN_FILE && 5473 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5474 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5475 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5476 break; 5477 } 5478 5479 /* 5480 * Put any error return on all the file returns that will 5481 * preceed this one. 5482 */ 5483 if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE && 5484 stat != 0 && rp->nfsrecly_stat == 0) { 5485 rp->nfsrecly_stat = stat; 5486 rp->nfsrecly_op = op; 5487 if (devid != NULL) 5488 NFSBCOPY(devid, rp->nfsrecly_devid, 5489 NFSX_V4DEVICEID); 5490 } 5491 } 5492 if (rp == NULL) { 5493 if (orp == NULL) 5494 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5495 nfsrecly_list); 5496 else 5497 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5498 } 5499 lyp->nfsly_flags |= NFSLY_RECALL; 5500 wakeup(lyp->nfsly_clp); 5501 return (0); 5502 } 5503 5504 /* 5505 * Compare the two seqids for ordering. The trick is that the seqids can 5506 * wrap around from 0xffffffff->0, so check for the cases where one 5507 * has wrapped around. 5508 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5509 */ 5510 static int 5511 nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5512 { 5513 5514 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5515 /* seqid2 has wrapped around. */ 5516 return (0); 5517 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5518 /* seqid1 has wrapped around. */ 5519 return (1); 5520 if (seqid1 <= seqid2) 5521 return (1); 5522 return (0); 5523 } 5524 5525 /* 5526 * Do a layout return for each of the recalls. 5527 */ 5528 static void 5529 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5530 struct ucred *cred, NFSPROC_T *p) 5531 { 5532 struct nfsclrecalllayout *rp; 5533 nfsv4stateid_t stateid; 5534 int layouttype; 5535 5536 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5537 stateid.seqid = lyp->nfsly_stateid.seqid; 5538 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5539 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5540 else 5541 layouttype = NFSLAYOUT_FLEXFILE; 5542 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5543 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5544 lyp->nfsly_fhlen, 0, layouttype, 5545 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5546 rp->nfsrecly_off, rp->nfsrecly_len, 5547 &stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op, 5548 rp->nfsrecly_devid); 5549 } 5550 } 5551 5552 /* 5553 * Do the layout commit for a file layout. 5554 */ 5555 static void 5556 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5557 struct ucred *cred, NFSPROC_T *p) 5558 { 5559 struct nfsclflayout *flp; 5560 uint64_t len; 5561 int error, layouttype; 5562 5563 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5564 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5565 else 5566 layouttype = NFSLAYOUT_FLEXFILE; 5567 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5568 if (layouttype == NFSLAYOUT_FLEXFILE && 5569 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) { 5570 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n"); 5571 /* If not supported, don't bother doing it. */ 5572 NFSLOCKMNT(nmp); 5573 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5574 NFSUNLOCKMNT(nmp); 5575 break; 5576 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5577 len = flp->nfsfl_end - flp->nfsfl_off; 5578 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5579 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5580 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5581 layouttype, cred, p, NULL); 5582 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5583 if (error == NFSERR_NOTSUPP) { 5584 /* If not supported, don't bother doing it. */ 5585 NFSLOCKMNT(nmp); 5586 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5587 NFSUNLOCKMNT(nmp); 5588 break; 5589 } 5590 } 5591 } 5592 } 5593 5594 /* 5595 * Commit all layouts for a file (vnode). 5596 */ 5597 int 5598 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5599 { 5600 struct nfsclclient *clp; 5601 struct nfscllayout *lyp; 5602 struct nfsnode *np = VTONFS(vp); 5603 mount_t mp; 5604 struct nfsmount *nmp; 5605 5606 mp = vp->v_mount; 5607 nmp = VFSTONFS(mp); 5608 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5609 return (0); 5610 NFSLOCKCLSTATE(); 5611 clp = nmp->nm_clp; 5612 if (clp == NULL) { 5613 NFSUNLOCKCLSTATE(); 5614 return (EPERM); 5615 } 5616 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5617 if (lyp == NULL) { 5618 NFSUNLOCKCLSTATE(); 5619 return (EPERM); 5620 } 5621 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5622 if (NFSCL_FORCEDISM(mp)) { 5623 NFSUNLOCKCLSTATE(); 5624 return (EPERM); 5625 } 5626 tryagain: 5627 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5628 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5629 NFSUNLOCKCLSTATE(); 5630 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5631 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5632 NFSLOCKCLSTATE(); 5633 goto tryagain; 5634 } 5635 nfsv4_relref(&lyp->nfsly_lock); 5636 NFSUNLOCKCLSTATE(); 5637 return (0); 5638 } 5639