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_unlinkopen(struct nfsclopen *); 111 static void nfscl_cleanclient(struct nfsclclient *); 112 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 113 struct ucred *, NFSPROC_T *); 114 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 115 struct nfsmount *, struct ucred *, NFSPROC_T *); 116 static void nfscl_recover(struct nfsclclient *, bool *, struct ucred *, 117 NFSPROC_T *); 118 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 119 struct nfscllock *, int); 120 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 121 struct nfscllock **, int); 122 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *, 123 struct nfscldeleghead *); 124 static u_int32_t nfscl_nextcbident(void); 125 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **); 126 static struct nfsclclient *nfscl_getclnt(u_int32_t); 127 static struct nfsclclient *nfscl_getclntsess(uint8_t *); 128 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 129 int); 130 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *, 131 int, struct nfsclrecalllayout **, struct nfscllayout **); 132 static void nfscl_reldevinfo_locked(struct nfscldevinfo *); 133 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *, 134 int); 135 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *); 136 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 137 u_int8_t *, struct nfscllock **); 138 static void nfscl_freealllocks(struct nfscllockownerhead *, int); 139 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 140 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 141 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 142 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 143 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *); 144 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 145 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 146 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 147 static void nfscl_totalrecall(struct nfsclclient *); 148 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 149 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 150 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 151 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 152 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 153 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 154 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 155 struct ucred *, NFSPROC_T *); 156 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 157 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 158 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *, 159 bool); 160 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t); 161 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 162 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 163 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int, 164 vnode_t *); 165 static void nfscl_freeopenowner(struct nfsclowner *, int); 166 static void nfscl_cleandeleg(struct nfscldeleg *); 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, bool firstref) 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, firstref, &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], lockown[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 (vp->v_type != VREG) 547 return (EISDIR); 548 np = VTONFS(vp); 549 nmp = VFSTONFS(vp->v_mount); 550 551 /* 552 * For "oneopenown" mounts, first check for a cached open in the 553 * NFS vnode, that can be used as a stateid. This can only be 554 * done if no delegations have been issued to the mount and no 555 * byte range file locking has been done for the file. 556 */ 557 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && fords == 0) { 558 NFSLOCKMNT(nmp); 559 NFSLOCKNODE(np); 560 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 && 561 (np->n_flag & NMIGHTBELOCKED) == 0 && 562 np->n_openstateid != NULL) { 563 stateidp->seqid = 0; 564 stateidp->other[0] = 565 np->n_openstateid->nfso_stateid.other[0]; 566 stateidp->other[1] = 567 np->n_openstateid->nfso_stateid.other[1]; 568 stateidp->other[2] = 569 np->n_openstateid->nfso_stateid.other[2]; 570 NFSUNLOCKNODE(np); 571 NFSUNLOCKMNT(nmp); 572 return (0); 573 } 574 NFSUNLOCKNODE(np); 575 NFSUNLOCKMNT(nmp); 576 } 577 578 NFSLOCKCLSTATE(); 579 clp = nfscl_findcl(nmp); 580 if (clp == NULL) { 581 NFSUNLOCKCLSTATE(); 582 return (EACCES); 583 } 584 585 /* 586 * Wait for recovery to complete. 587 */ 588 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 589 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 590 PZERO, "nfsrecvr", NULL); 591 592 /* 593 * First, look for a delegation. 594 */ 595 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 596 if (dp->nfsdl_fhlen == fhlen && 597 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 598 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 599 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 600 if (NFSHASNFSV4N(nmp)) 601 stateidp->seqid = 0; 602 else 603 stateidp->seqid = 604 dp->nfsdl_stateid.seqid; 605 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 606 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 607 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 608 if (!(np->n_flag & NDELEGRECALL)) { 609 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 610 nfsdl_list); 611 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 612 nfsdl_list); 613 dp->nfsdl_timestamp = NFSD_MONOSEC + 614 120; 615 dp->nfsdl_rwlock.nfslock_usecnt++; 616 *lckpp = (void *)&dp->nfsdl_rwlock; 617 } 618 NFSUNLOCKCLSTATE(); 619 return (0); 620 } 621 break; 622 } 623 } 624 625 if (p != NULL) { 626 /* 627 * If p != NULL, we want to search the parentage tree 628 * for a matching OpenOwner and use that. 629 */ 630 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) 631 nfscl_filllockowner(NULL, own, F_POSIX); 632 else 633 nfscl_filllockowner(p->td_proc, own, F_POSIX); 634 nfscl_filllockowner(p->td_proc, lockown, F_POSIX); 635 lp = NULL; 636 error = nfscl_getopen(NULL, clp->nfsc_openhash, nfhp, fhlen, 637 own, lockown, mode, &lp, &op); 638 if (error == 0 && lp != NULL && fords == 0) { 639 /* Don't return a lock stateid for a DS. */ 640 if (NFSHASNFSV4N(nmp)) 641 stateidp->seqid = 0; 642 else 643 stateidp->seqid = lp->nfsl_stateid.seqid; 644 stateidp->other[0] = 645 lp->nfsl_stateid.other[0]; 646 stateidp->other[1] = 647 lp->nfsl_stateid.other[1]; 648 stateidp->other[2] = 649 lp->nfsl_stateid.other[2]; 650 NFSUNLOCKCLSTATE(); 651 return (0); 652 } 653 } 654 if (op == NULL) { 655 /* If not found, just look for any OpenOwner that will work. */ 656 top = NULL; 657 done = false; 658 oph = NFSCLOPENHASH(clp, nfhp, fhlen); 659 LIST_FOREACH(op, oph, nfso_hash) { 660 if (op->nfso_fhlen == fhlen && 661 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) { 662 if (top == NULL && (op->nfso_mode & 663 NFSV4OPEN_ACCESSWRITE) != 0 && 664 (mode & NFSV4OPEN_ACCESSREAD) != 0) 665 top = op; 666 if ((mode & op->nfso_mode) == mode) { 667 /* LRU order the hash list. */ 668 LIST_REMOVE(op, nfso_hash); 669 LIST_INSERT_HEAD(oph, op, nfso_hash); 670 done = true; 671 break; 672 } 673 } 674 } 675 if (!done) { 676 NFSCL_DEBUG(2, "openmode top=%p\n", top); 677 if (top == NULL || NFSHASOPENMODE(nmp)) { 678 NFSUNLOCKCLSTATE(); 679 return (ENOENT); 680 } else 681 op = top; 682 } 683 /* 684 * For read aheads or write behinds, use the open cred. 685 * A read ahead or write behind is indicated by p == NULL. 686 */ 687 if (p == NULL) 688 newnfs_copycred(&op->nfso_cred, cred); 689 } 690 691 /* 692 * No lock stateid, so return the open stateid. 693 */ 694 if (NFSHASNFSV4N(nmp)) 695 stateidp->seqid = 0; 696 else 697 stateidp->seqid = op->nfso_stateid.seqid; 698 stateidp->other[0] = op->nfso_stateid.other[0]; 699 stateidp->other[1] = op->nfso_stateid.other[1]; 700 stateidp->other[2] = op->nfso_stateid.other[2]; 701 NFSUNLOCKCLSTATE(); 702 return (0); 703 } 704 705 /* 706 * Search for a matching file, mode and, optionally, lockowner. 707 */ 708 static int 709 nfscl_getopen(struct nfsclownerhead *ohp, struct nfsclopenhash *ohashp, 710 u_int8_t *nfhp, int fhlen, u_int8_t *openown, u_int8_t *lockown, 711 u_int32_t mode, struct nfscllockowner **lpp, struct nfsclopen **opp) 712 { 713 struct nfsclowner *owp; 714 struct nfsclopen *op, *rop, *rop2; 715 struct nfsclopenhash *oph; 716 bool keep_looping; 717 718 KASSERT(ohp == NULL || ohashp == NULL, ("nfscl_getopen: " 719 "only one of ohp and ohashp can be set")); 720 if (lpp != NULL) 721 *lpp = NULL; 722 /* 723 * rop will be set to the open to be returned. There are three 724 * variants of this, all for an open of the correct file: 725 * 1 - A match of lockown. 726 * 2 - A match of the openown, when no lockown match exists. 727 * 3 - A match for any open, if no openown or lockown match exists. 728 * Looking for #2 over #3 probably isn't necessary, but since 729 * RFC3530 is vague w.r.t. the relationship between openowners and 730 * lockowners, I think this is the safer way to go. 731 */ 732 rop = NULL; 733 rop2 = NULL; 734 keep_looping = true; 735 /* Search the client list */ 736 if (ohashp == NULL) { 737 /* Search the local opens on the delegation. */ 738 LIST_FOREACH(owp, ohp, nfsow_list) { 739 /* and look for the correct open */ 740 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 741 if (op->nfso_fhlen == fhlen && 742 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 743 && (op->nfso_mode & mode) == mode) 744 keep_looping = nfscl_checkown(owp, op, openown, 745 lockown, lpp, &rop, &rop2); 746 if (!keep_looping) 747 break; 748 } 749 if (!keep_looping) 750 break; 751 } 752 } else { 753 /* Search for matching opens on the hash list. */ 754 oph = &ohashp[NFSCLOPENHASHFUNC(nfhp, fhlen)]; 755 LIST_FOREACH(op, oph, nfso_hash) { 756 if (op->nfso_fhlen == fhlen && 757 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 758 && (op->nfso_mode & mode) == mode) 759 keep_looping = nfscl_checkown(op->nfso_own, op, 760 openown, lockown, lpp, &rop, &rop2); 761 if (!keep_looping) { 762 /* LRU order the hash list. */ 763 LIST_REMOVE(op, nfso_hash); 764 LIST_INSERT_HEAD(oph, op, nfso_hash); 765 break; 766 } 767 } 768 } 769 if (rop == NULL) 770 rop = rop2; 771 if (rop == NULL) 772 return (EBADF); 773 *opp = rop; 774 return (0); 775 } 776 777 /* Check for an owner match. */ 778 static bool 779 nfscl_checkown(struct nfsclowner *owp, struct nfsclopen *op, uint8_t *openown, 780 uint8_t *lockown, struct nfscllockowner **lpp, struct nfsclopen **ropp, 781 struct nfsclopen **ropp2) 782 { 783 struct nfscllockowner *lp; 784 bool keep_looping; 785 786 keep_looping = true; 787 if (lpp != NULL) { 788 /* Now look for a matching lockowner. */ 789 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 790 if (!NFSBCMP(lp->nfsl_owner, lockown, 791 NFSV4CL_LOCKNAMELEN)) { 792 *lpp = lp; 793 *ropp = op; 794 return (false); 795 } 796 } 797 } 798 if (*ropp == NULL && !NFSBCMP(owp->nfsow_owner, openown, 799 NFSV4CL_LOCKNAMELEN)) { 800 *ropp = op; 801 if (lpp == NULL) 802 keep_looping = false; 803 } 804 if (*ropp2 == NULL) 805 *ropp2 = op; 806 return (keep_looping); 807 } 808 809 /* 810 * Release use of an open owner. Called when open operations are done 811 * with the open owner. 812 */ 813 void 814 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp, 815 __unused int error, __unused int candelete, int unlocked) 816 { 817 818 if (owp == NULL) 819 return; 820 NFSLOCKCLSTATE(); 821 if (unlocked == 0) { 822 if (NFSHASONEOPENOWN(nmp)) 823 nfsv4_relref(&owp->nfsow_rwlock); 824 else 825 nfscl_lockunlock(&owp->nfsow_rwlock); 826 } 827 nfscl_clrelease(owp->nfsow_clp); 828 NFSUNLOCKCLSTATE(); 829 } 830 831 /* 832 * Release use of an open structure under an open owner. 833 */ 834 void 835 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error, 836 int candelete) 837 { 838 struct nfsclclient *clp; 839 struct nfsclowner *owp; 840 841 if (op == NULL) 842 return; 843 NFSLOCKCLSTATE(); 844 owp = op->nfso_own; 845 if (NFSHASONEOPENOWN(nmp)) 846 nfsv4_relref(&owp->nfsow_rwlock); 847 else 848 nfscl_lockunlock(&owp->nfsow_rwlock); 849 clp = owp->nfsow_clp; 850 if (error && candelete && op->nfso_opencnt == 0) 851 nfscl_freeopen(op, 0, true); 852 nfscl_clrelease(clp); 853 NFSUNLOCKCLSTATE(); 854 } 855 856 /* 857 * Called to get a clientid structure. It will optionally lock the 858 * client data structures to do the SetClientId/SetClientId_confirm, 859 * but will release that lock and return the clientid with a reference 860 * count on it. 861 * If the "cred" argument is NULL, a new clientid should not be created. 862 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 863 * be done. 864 * It always clpp with a reference count on it, unless returning an error. 865 */ 866 int 867 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p, 868 bool tryminvers, bool firstref, struct nfsclclient **clpp) 869 { 870 struct nfsclclient *clp; 871 struct nfsclclient *newclp = NULL; 872 struct nfsmount *nmp; 873 char uuid[HOSTUUIDLEN]; 874 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 875 u_int16_t idlen = 0; 876 877 nmp = VFSTONFS(mp); 878 if (cred != NULL) { 879 getcredhostuuid(cred, uuid, sizeof uuid); 880 idlen = strlen(uuid); 881 if (idlen > 0) 882 idlen += sizeof (u_int64_t); 883 else 884 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 885 newclp = malloc( 886 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 887 M_WAITOK | M_ZERO); 888 } 889 NFSLOCKCLSTATE(); 890 /* 891 * If a forced dismount is already in progress, don't 892 * allocate a new clientid and get out now. For the case where 893 * clp != NULL, this is a harmless optimization. 894 */ 895 if (NFSCL_FORCEDISM(mp)) { 896 NFSUNLOCKCLSTATE(); 897 if (newclp != NULL) 898 free(newclp, M_NFSCLCLIENT); 899 return (EBADF); 900 } 901 clp = nmp->nm_clp; 902 if (clp == NULL) { 903 if (newclp == NULL) { 904 NFSUNLOCKCLSTATE(); 905 return (EACCES); 906 } 907 clp = newclp; 908 clp->nfsc_idlen = idlen; 909 LIST_INIT(&clp->nfsc_owner); 910 TAILQ_INIT(&clp->nfsc_deleg); 911 TAILQ_INIT(&clp->nfsc_layout); 912 LIST_INIT(&clp->nfsc_devinfo); 913 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 914 LIST_INIT(&clp->nfsc_deleghash[i]); 915 for (i = 0; i < NFSCLOPENHASHSIZE; i++) 916 LIST_INIT(&clp->nfsc_openhash[i]); 917 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 918 LIST_INIT(&clp->nfsc_layouthash[i]); 919 clp->nfsc_flags = NFSCLFLAGS_INITED; 920 clp->nfsc_clientidrev = 1; 921 clp->nfsc_cbident = nfscl_nextcbident(); 922 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 923 clp->nfsc_idlen); 924 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 925 nmp->nm_clp = clp; 926 clp->nfsc_nmp = nmp; 927 } else { 928 if (newclp != NULL) 929 free(newclp, M_NFSCLCLIENT); 930 } 931 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 932 !NFSCL_FORCEDISM(mp)) 933 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 934 NFSCLSTATEMUTEXPTR, mp); 935 if (igotlock == 0) { 936 /* 937 * Call nfsv4_lock() with "iwantlock == 0" on the firstref so 938 * that it will wait for a pending exclusive lock request. 939 * This gives the exclusive lock request priority over this 940 * shared lock request. 941 * An exclusive lock on nfsc_lock is used mainly for server 942 * crash recoveries and delegation recalls. 943 */ 944 if (firstref) 945 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, 946 mp); 947 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 948 } 949 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) { 950 /* 951 * Both nfsv4_lock() and nfsv4_getref() know to check 952 * for NFSCL_FORCEDISM() and return without sleeping to 953 * wait for the exclusive lock to be released, since it 954 * might be held by nfscl_umount() and we need to get out 955 * now for that case and not wait until nfscl_umount() 956 * releases it. 957 */ 958 NFSUNLOCKCLSTATE(); 959 return (EBADF); 960 } 961 NFSUNLOCKCLSTATE(); 962 963 /* 964 * If it needs a clientid, do the setclientid now. 965 */ 966 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 967 if (!igotlock) 968 panic("nfscl_clget"); 969 if (p == NULL || cred == NULL) { 970 NFSLOCKCLSTATE(); 971 nfsv4_unlock(&clp->nfsc_lock, 0); 972 NFSUNLOCKCLSTATE(); 973 return (EACCES); 974 } 975 /* 976 * If RFC3530 Sec. 14.2.33 is taken literally, 977 * NFSERR_CLIDINUSE will be returned persistently for the 978 * case where a new mount of the same file system is using 979 * a different principal. In practice, NFSERR_CLIDINUSE is 980 * only returned when there is outstanding unexpired state 981 * on the clientid. As such, try for twice the lease 982 * interval, if we know what that is. Otherwise, make a 983 * wild ass guess. 984 * The case of returning NFSERR_STALECLIENTID is far less 985 * likely, but might occur if there is a significant delay 986 * between doing the SetClientID and SetClientIDConfirm Ops, 987 * such that the server throws away the clientid before 988 * receiving the SetClientIDConfirm. 989 */ 990 if (clp->nfsc_renew > 0) 991 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 992 else 993 clidinusedelay = 120; 994 trystalecnt = 3; 995 do { 996 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p); 997 if (error == NFSERR_STALECLIENTID || 998 error == NFSERR_STALEDONTRECOVER || 999 error == NFSERR_BADSESSION || 1000 error == NFSERR_CLIDINUSE) { 1001 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 1002 } else if (error == NFSERR_MINORVERMISMATCH && 1003 tryminvers) { 1004 if (nmp->nm_minorvers > 0) 1005 nmp->nm_minorvers--; 1006 else 1007 tryminvers = false; 1008 } 1009 } while (((error == NFSERR_STALECLIENTID || 1010 error == NFSERR_BADSESSION || 1011 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 1012 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0) || 1013 (error == NFSERR_MINORVERMISMATCH && tryminvers)); 1014 if (error) { 1015 NFSLOCKCLSTATE(); 1016 nfsv4_unlock(&clp->nfsc_lock, 0); 1017 NFSUNLOCKCLSTATE(); 1018 return (error); 1019 } 1020 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 1021 } 1022 if (igotlock) { 1023 NFSLOCKCLSTATE(); 1024 nfsv4_unlock(&clp->nfsc_lock, 1); 1025 NFSUNLOCKCLSTATE(); 1026 } 1027 1028 *clpp = clp; 1029 return (0); 1030 } 1031 1032 /* 1033 * Get a reference to a clientid and return it, if valid. 1034 */ 1035 struct nfsclclient * 1036 nfscl_findcl(struct nfsmount *nmp) 1037 { 1038 struct nfsclclient *clp; 1039 1040 clp = nmp->nm_clp; 1041 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 1042 return (NULL); 1043 return (clp); 1044 } 1045 1046 /* 1047 * Release the clientid structure. It may be locked or reference counted. 1048 */ 1049 static void 1050 nfscl_clrelease(struct nfsclclient *clp) 1051 { 1052 1053 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 1054 nfsv4_unlock(&clp->nfsc_lock, 0); 1055 else 1056 nfsv4_relref(&clp->nfsc_lock); 1057 } 1058 1059 /* 1060 * External call for nfscl_clrelease. 1061 */ 1062 void 1063 nfscl_clientrelease(struct nfsclclient *clp) 1064 { 1065 1066 NFSLOCKCLSTATE(); 1067 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 1068 nfsv4_unlock(&clp->nfsc_lock, 0); 1069 else 1070 nfsv4_relref(&clp->nfsc_lock); 1071 NFSUNLOCKCLSTATE(); 1072 } 1073 1074 /* 1075 * Called when wanting to lock a byte region. 1076 */ 1077 int 1078 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1079 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 1080 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 1081 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 1082 { 1083 struct nfscllockowner *lp; 1084 struct nfsclopen *op; 1085 struct nfsclclient *clp; 1086 struct nfscllockowner *nlp; 1087 struct nfscllock *nlop, *otherlop; 1088 struct nfscldeleg *dp = NULL, *ldp = NULL; 1089 struct nfscllockownerhead *lhp = NULL; 1090 struct nfsnode *np; 1091 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 1092 u_int8_t *openownp; 1093 int error = 0, ret, donelocally = 0; 1094 u_int32_t mode; 1095 1096 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 1097 mode = 0; 1098 np = VTONFS(vp); 1099 *lpp = NULL; 1100 lp = NULL; 1101 *newonep = 0; 1102 *donelocallyp = 0; 1103 1104 /* 1105 * Might need these, so MALLOC them now, to 1106 * avoid a tsleep() in MALLOC later. 1107 */ 1108 nlp = malloc( 1109 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 1110 otherlop = malloc( 1111 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1112 nlop = malloc( 1113 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1114 nlop->nfslo_type = type; 1115 nlop->nfslo_first = off; 1116 if (len == NFS64BITSSET) { 1117 nlop->nfslo_end = NFS64BITSSET; 1118 } else { 1119 nlop->nfslo_end = off + len; 1120 if (nlop->nfslo_end <= nlop->nfslo_first) 1121 error = NFSERR_INVAL; 1122 } 1123 1124 if (!error) { 1125 if (recovery) 1126 clp = rclp; 1127 else 1128 error = nfscl_getcl(vp->v_mount, cred, p, false, true, 1129 &clp); 1130 } 1131 if (error) { 1132 free(nlp, M_NFSCLLOCKOWNER); 1133 free(otherlop, M_NFSCLLOCK); 1134 free(nlop, M_NFSCLLOCK); 1135 return (error); 1136 } 1137 1138 op = NULL; 1139 if (recovery) { 1140 ownp = rownp; 1141 openownp = ropenownp; 1142 } else { 1143 nfscl_filllockowner(id, own, flags); 1144 ownp = own; 1145 if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) 1146 nfscl_filllockowner(NULL, openown, F_POSIX); 1147 else 1148 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 1149 openownp = openown; 1150 } 1151 if (!recovery) { 1152 NFSLOCKCLSTATE(); 1153 /* 1154 * First, search for a delegation. If one exists for this file, 1155 * the lock can be done locally against it, so long as there 1156 * isn't a local lock conflict. 1157 */ 1158 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1159 np->n_fhp->nfh_len); 1160 /* Just sanity check for correct type of delegation */ 1161 if (dp != NULL && ((dp->nfsdl_flags & 1162 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 1163 (type == F_WRLCK && 1164 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 1165 dp = NULL; 1166 } 1167 if (dp != NULL) { 1168 /* Now, find an open and maybe a lockowner. */ 1169 ret = nfscl_getopen(&dp->nfsdl_owner, NULL, np->n_fhp->nfh_fh, 1170 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 1171 if (ret) 1172 ret = nfscl_getopen(NULL, clp->nfsc_openhash, 1173 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1174 ownp, mode, NULL, &op); 1175 if (!ret) { 1176 lhp = &dp->nfsdl_lock; 1177 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 1178 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 1179 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 1180 donelocally = 1; 1181 } else { 1182 dp = NULL; 1183 } 1184 } 1185 if (!donelocally) { 1186 /* 1187 * Get the related Open and maybe lockowner. 1188 */ 1189 error = nfscl_getopen(NULL, clp->nfsc_openhash, 1190 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1191 ownp, mode, &lp, &op); 1192 if (!error) 1193 lhp = &op->nfso_lock; 1194 } 1195 if (!error && !recovery) 1196 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1197 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1198 if (error) { 1199 if (!recovery) { 1200 nfscl_clrelease(clp); 1201 NFSUNLOCKCLSTATE(); 1202 } 1203 free(nlp, M_NFSCLLOCKOWNER); 1204 free(otherlop, M_NFSCLLOCK); 1205 free(nlop, M_NFSCLLOCK); 1206 return (error); 1207 } 1208 1209 /* 1210 * Ok, see if a lockowner exists and create one, as required. 1211 */ 1212 if (lp == NULL) 1213 LIST_FOREACH(lp, lhp, nfsl_list) { 1214 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1215 break; 1216 } 1217 if (lp == NULL) { 1218 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1219 if (recovery) 1220 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1221 NFSV4CL_LOCKNAMELEN); 1222 else 1223 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1224 NFSV4CL_LOCKNAMELEN); 1225 nlp->nfsl_seqid = 0; 1226 nlp->nfsl_lockflags = flags; 1227 nlp->nfsl_inprog = NULL; 1228 nfscl_lockinit(&nlp->nfsl_rwlock); 1229 LIST_INIT(&nlp->nfsl_lock); 1230 if (donelocally) { 1231 nlp->nfsl_open = NULL; 1232 nfsstatsv1.cllocallockowners++; 1233 } else { 1234 nlp->nfsl_open = op; 1235 nfsstatsv1.cllockowners++; 1236 } 1237 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1238 lp = nlp; 1239 nlp = NULL; 1240 *newonep = 1; 1241 } 1242 1243 /* 1244 * Now, update the byte ranges for locks. 1245 */ 1246 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1247 if (!ret) 1248 donelocally = 1; 1249 if (donelocally) { 1250 *donelocallyp = 1; 1251 if (!recovery) 1252 nfscl_clrelease(clp); 1253 } else { 1254 /* 1255 * Serial modifications on the lock owner for multiple threads 1256 * for the same process using a read/write lock. 1257 */ 1258 if (!recovery) 1259 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1260 } 1261 if (!recovery) 1262 NFSUNLOCKCLSTATE(); 1263 1264 if (nlp) 1265 free(nlp, M_NFSCLLOCKOWNER); 1266 if (nlop) 1267 free(nlop, M_NFSCLLOCK); 1268 if (otherlop) 1269 free(otherlop, M_NFSCLLOCK); 1270 1271 *lpp = lp; 1272 return (0); 1273 } 1274 1275 /* 1276 * Called to unlock a byte range, for LockU. 1277 */ 1278 int 1279 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1280 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1281 struct nfsclclient *clp, void *id, int flags, 1282 struct nfscllockowner **lpp, int *dorpcp) 1283 { 1284 struct nfscllockowner *lp; 1285 struct nfsclopen *op; 1286 struct nfscllock *nlop, *other_lop = NULL; 1287 struct nfscldeleg *dp; 1288 struct nfsnode *np; 1289 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1290 int ret = 0, fnd; 1291 1292 np = VTONFS(vp); 1293 *lpp = NULL; 1294 *dorpcp = 0; 1295 1296 /* 1297 * Might need these, so MALLOC them now, to 1298 * avoid a tsleep() in MALLOC later. 1299 */ 1300 nlop = malloc( 1301 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1302 nlop->nfslo_type = F_UNLCK; 1303 nlop->nfslo_first = off; 1304 if (len == NFS64BITSSET) { 1305 nlop->nfslo_end = NFS64BITSSET; 1306 } else { 1307 nlop->nfslo_end = off + len; 1308 if (nlop->nfslo_end <= nlop->nfslo_first) { 1309 free(nlop, M_NFSCLLOCK); 1310 return (NFSERR_INVAL); 1311 } 1312 } 1313 if (callcnt == 0) { 1314 other_lop = malloc( 1315 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1316 *other_lop = *nlop; 1317 } 1318 nfscl_filllockowner(id, own, flags); 1319 dp = NULL; 1320 NFSLOCKCLSTATE(); 1321 if (callcnt == 0) 1322 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1323 np->n_fhp->nfh_len); 1324 1325 /* 1326 * First, unlock any local regions on a delegation. 1327 */ 1328 if (dp != NULL) { 1329 /* Look for this lockowner. */ 1330 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1331 if (!NFSBCMP(lp->nfsl_owner, own, 1332 NFSV4CL_LOCKNAMELEN)) 1333 break; 1334 } 1335 if (lp != NULL) 1336 /* Use other_lop, so nlop is still available */ 1337 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1338 } 1339 1340 /* 1341 * Now, find a matching open/lockowner that hasn't already been done, 1342 * as marked by nfsl_inprog. 1343 */ 1344 lp = NULL; 1345 fnd = 0; 1346 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh, 1347 np->n_fhp->nfh_len), nfso_hash) { 1348 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1349 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1350 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1351 if (lp->nfsl_inprog == NULL && 1352 !NFSBCMP(lp->nfsl_owner, own, 1353 NFSV4CL_LOCKNAMELEN)) { 1354 fnd = 1; 1355 break; 1356 } 1357 } 1358 } 1359 if (fnd) 1360 break; 1361 } 1362 1363 if (lp != NULL) { 1364 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1365 if (ret) 1366 *dorpcp = 1; 1367 /* 1368 * Serial modifications on the lock owner for multiple 1369 * threads for the same process using a read/write lock. 1370 */ 1371 lp->nfsl_inprog = p; 1372 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1373 *lpp = lp; 1374 } 1375 NFSUNLOCKCLSTATE(); 1376 if (nlop) 1377 free(nlop, M_NFSCLLOCK); 1378 if (other_lop) 1379 free(other_lop, M_NFSCLLOCK); 1380 return (0); 1381 } 1382 1383 /* 1384 * Release all lockowners marked in progess for this process and file. 1385 */ 1386 void 1387 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1388 void *id, int flags) 1389 { 1390 struct nfsclopen *op; 1391 struct nfscllockowner *lp; 1392 struct nfsnode *np; 1393 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1394 1395 np = VTONFS(vp); 1396 nfscl_filllockowner(id, own, flags); 1397 NFSLOCKCLSTATE(); 1398 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh, 1399 np->n_fhp->nfh_len), nfso_hash) { 1400 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1401 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1402 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1403 if (lp->nfsl_inprog == p && 1404 !NFSBCMP(lp->nfsl_owner, own, 1405 NFSV4CL_LOCKNAMELEN)) { 1406 lp->nfsl_inprog = NULL; 1407 nfscl_lockunlock(&lp->nfsl_rwlock); 1408 } 1409 } 1410 } 1411 } 1412 nfscl_clrelease(clp); 1413 NFSUNLOCKCLSTATE(); 1414 } 1415 1416 /* 1417 * Called to find out if any bytes within the byte range specified are 1418 * write locked by the calling process. Used to determine if flushing 1419 * is required before a LockU. 1420 * If in doubt, return 1, so the flush will occur. 1421 */ 1422 int 1423 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1424 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1425 { 1426 struct nfscllockowner *lp; 1427 struct nfsclopen *op; 1428 struct nfsclclient *clp; 1429 struct nfscllock *lop; 1430 struct nfscldeleg *dp; 1431 struct nfsnode *np; 1432 u_int64_t off, end; 1433 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1434 int error = 0; 1435 1436 np = VTONFS(vp); 1437 switch (fl->l_whence) { 1438 case SEEK_SET: 1439 case SEEK_CUR: 1440 /* 1441 * Caller is responsible for adding any necessary offset 1442 * when SEEK_CUR is used. 1443 */ 1444 off = fl->l_start; 1445 break; 1446 case SEEK_END: 1447 off = np->n_size + fl->l_start; 1448 break; 1449 default: 1450 return (1); 1451 } 1452 if (fl->l_len != 0) { 1453 end = off + fl->l_len; 1454 if (end < off) 1455 return (1); 1456 } else { 1457 end = NFS64BITSSET; 1458 } 1459 1460 error = nfscl_getcl(vp->v_mount, cred, p, false, true, &clp); 1461 if (error) 1462 return (1); 1463 nfscl_filllockowner(id, own, flags); 1464 NFSLOCKCLSTATE(); 1465 1466 /* 1467 * First check the delegation locks. 1468 */ 1469 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1470 if (dp != NULL) { 1471 /* No need to flush if it is a write delegation. */ 1472 if ((dp->nfsdl_flags & NFSCLDL_WRITE) != 0) { 1473 nfscl_clrelease(clp); 1474 NFSUNLOCKCLSTATE(); 1475 return (0); 1476 } 1477 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1478 if (!NFSBCMP(lp->nfsl_owner, own, 1479 NFSV4CL_LOCKNAMELEN)) 1480 break; 1481 } 1482 if (lp != NULL) { 1483 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1484 if (lop->nfslo_first >= end) 1485 break; 1486 if (lop->nfslo_end <= off) 1487 continue; 1488 if (lop->nfslo_type == F_WRLCK) { 1489 nfscl_clrelease(clp); 1490 NFSUNLOCKCLSTATE(); 1491 return (1); 1492 } 1493 } 1494 } 1495 } 1496 1497 /* 1498 * Now, check state against the server. 1499 */ 1500 LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh, 1501 np->n_fhp->nfh_len), nfso_hash) { 1502 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1503 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1504 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1505 if (!NFSBCMP(lp->nfsl_owner, own, 1506 NFSV4CL_LOCKNAMELEN)) 1507 break; 1508 } 1509 if (lp != NULL) { 1510 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1511 if (lop->nfslo_first >= end) 1512 break; 1513 if (lop->nfslo_end <= off) 1514 continue; 1515 if (lop->nfslo_type == F_WRLCK) { 1516 nfscl_clrelease(clp); 1517 NFSUNLOCKCLSTATE(); 1518 return (1); 1519 } 1520 } 1521 } 1522 } 1523 } 1524 nfscl_clrelease(clp); 1525 NFSUNLOCKCLSTATE(); 1526 return (0); 1527 } 1528 1529 /* 1530 * Release a byte range lock owner structure. 1531 */ 1532 void 1533 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1534 { 1535 struct nfsclclient *clp; 1536 1537 if (lp == NULL) 1538 return; 1539 NFSLOCKCLSTATE(); 1540 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1541 if (error != 0 && candelete && 1542 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1543 nfscl_freelockowner(lp, 0); 1544 else 1545 nfscl_lockunlock(&lp->nfsl_rwlock); 1546 nfscl_clrelease(clp); 1547 NFSUNLOCKCLSTATE(); 1548 } 1549 1550 /* 1551 * Unlink the open structure. 1552 */ 1553 static void 1554 nfscl_unlinkopen(struct nfsclopen *op) 1555 { 1556 1557 LIST_REMOVE(op, nfso_list); 1558 if (op->nfso_hash.le_prev != NULL) 1559 LIST_REMOVE(op, nfso_hash); 1560 } 1561 1562 /* 1563 * Free up an open structure and any associated byte range lock structures. 1564 */ 1565 void 1566 nfscl_freeopen(struct nfsclopen *op, int local, bool unlink) 1567 { 1568 1569 if (unlink) 1570 nfscl_unlinkopen(op); 1571 nfscl_freealllocks(&op->nfso_lock, local); 1572 free(op, M_NFSCLOPEN); 1573 if (local) 1574 nfsstatsv1.cllocalopens--; 1575 else 1576 nfsstatsv1.clopens--; 1577 } 1578 1579 /* 1580 * Free up all lock owners and associated locks. 1581 */ 1582 static void 1583 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1584 { 1585 struct nfscllockowner *lp, *nlp; 1586 1587 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1588 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1589 panic("nfscllckw"); 1590 nfscl_freelockowner(lp, local); 1591 } 1592 } 1593 1594 /* 1595 * Called for an Open when NFSERR_EXPIRED is received from the server. 1596 * If there are no byte range locks nor a Share Deny lost, try to do a 1597 * fresh Open. Otherwise, free the open. 1598 */ 1599 static int 1600 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1601 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1602 { 1603 struct nfscllockowner *lp; 1604 struct nfscldeleg *dp; 1605 int mustdelete = 0, error; 1606 1607 /* 1608 * Look for any byte range lock(s). 1609 */ 1610 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1611 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1612 mustdelete = 1; 1613 break; 1614 } 1615 } 1616 1617 /* 1618 * If no byte range lock(s) nor a Share deny, try to re-open. 1619 */ 1620 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1621 newnfs_copycred(&op->nfso_cred, cred); 1622 dp = NULL; 1623 error = nfsrpc_reopen(nmp, op->nfso_fh, 1624 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1625 if (error) { 1626 mustdelete = 1; 1627 if (dp != NULL) { 1628 free(dp, M_NFSCLDELEG); 1629 dp = NULL; 1630 } 1631 } 1632 if (dp != NULL) 1633 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1634 op->nfso_fhlen, cred, p, &dp); 1635 } 1636 1637 /* 1638 * If a byte range lock or Share deny or couldn't re-open, free it. 1639 */ 1640 if (mustdelete) 1641 nfscl_freeopen(op, 0, true); 1642 return (mustdelete); 1643 } 1644 1645 /* 1646 * Free up an open owner structure. 1647 */ 1648 static void 1649 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1650 { 1651 int owned; 1652 1653 /* 1654 * Make sure the NFSCLSTATE mutex is held, to avoid races with 1655 * calls in nfscl_renewthread() that do not hold a reference 1656 * count on the nfsclclient and just the mutex. 1657 * The mutex will not be held for calls done with the exclusive 1658 * nfsclclient lock held, in particular, nfscl_hasexpired() 1659 * and nfscl_recalldeleg() might do this. 1660 */ 1661 owned = mtx_owned(NFSCLSTATEMUTEXPTR); 1662 if (owned == 0) 1663 NFSLOCKCLSTATE(); 1664 LIST_REMOVE(owp, nfsow_list); 1665 if (owned == 0) 1666 NFSUNLOCKCLSTATE(); 1667 free(owp, M_NFSCLOWNER); 1668 if (local) 1669 nfsstatsv1.cllocalopenowners--; 1670 else 1671 nfsstatsv1.clopenowners--; 1672 } 1673 1674 /* 1675 * Free up a byte range lock owner structure. 1676 */ 1677 void 1678 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1679 { 1680 struct nfscllock *lop, *nlop; 1681 int owned; 1682 1683 /* 1684 * Make sure the NFSCLSTATE mutex is held, to avoid races with 1685 * calls in nfscl_renewthread() that do not hold a reference 1686 * count on the nfsclclient and just the mutex. 1687 * The mutex will not be held for calls done with the exclusive 1688 * nfsclclient lock held, in particular, nfscl_hasexpired() 1689 * and nfscl_recalldeleg() might do this. 1690 */ 1691 owned = mtx_owned(NFSCLSTATEMUTEXPTR); 1692 if (owned == 0) 1693 NFSLOCKCLSTATE(); 1694 LIST_REMOVE(lp, nfsl_list); 1695 if (owned == 0) 1696 NFSUNLOCKCLSTATE(); 1697 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1698 nfscl_freelock(lop, local); 1699 } 1700 free(lp, M_NFSCLLOCKOWNER); 1701 if (local) 1702 nfsstatsv1.cllocallockowners--; 1703 else 1704 nfsstatsv1.cllockowners--; 1705 } 1706 1707 /* 1708 * Free up a byte range lock structure. 1709 */ 1710 void 1711 nfscl_freelock(struct nfscllock *lop, int local) 1712 { 1713 1714 LIST_REMOVE(lop, nfslo_list); 1715 free(lop, M_NFSCLLOCK); 1716 if (local) 1717 nfsstatsv1.cllocallocks--; 1718 else 1719 nfsstatsv1.cllocks--; 1720 } 1721 1722 /* 1723 * Clean out the state related to a delegation. 1724 */ 1725 static void 1726 nfscl_cleandeleg(struct nfscldeleg *dp) 1727 { 1728 struct nfsclowner *owp, *nowp; 1729 struct nfsclopen *op; 1730 1731 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1732 op = LIST_FIRST(&owp->nfsow_open); 1733 if (op != NULL) { 1734 if (LIST_NEXT(op, nfso_list) != NULL) 1735 panic("nfscleandel"); 1736 nfscl_freeopen(op, 1, true); 1737 } 1738 nfscl_freeopenowner(owp, 1); 1739 } 1740 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1741 } 1742 1743 /* 1744 * Free a delegation. 1745 */ 1746 static void 1747 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp, bool freeit) 1748 { 1749 1750 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1751 LIST_REMOVE(dp, nfsdl_hash); 1752 if (freeit) 1753 free(dp, M_NFSCLDELEG); 1754 nfsstatsv1.cldelegates--; 1755 nfscl_delegcnt--; 1756 } 1757 1758 /* 1759 * Free up all state related to this client structure. 1760 */ 1761 static void 1762 nfscl_cleanclient(struct nfsclclient *clp) 1763 { 1764 struct nfsclowner *owp, *nowp; 1765 struct nfsclopen *op, *nop; 1766 struct nfscllayout *lyp, *nlyp; 1767 struct nfscldevinfo *dip, *ndip; 1768 1769 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 1770 nfscl_freelayout(lyp); 1771 1772 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) 1773 nfscl_freedevinfo(dip); 1774 1775 /* Now, all the OpenOwners, etc. */ 1776 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1777 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1778 nfscl_freeopen(op, 0, true); 1779 } 1780 nfscl_freeopenowner(owp, 0); 1781 } 1782 } 1783 1784 /* 1785 * Called when an NFSERR_EXPIRED is received from the server. 1786 */ 1787 static void 1788 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1789 struct ucred *cred, NFSPROC_T *p) 1790 { 1791 struct nfsclowner *owp, *nowp, *towp; 1792 struct nfsclopen *op, *nop, *top; 1793 struct nfscldeleg *dp, *ndp; 1794 int ret, printed = 0; 1795 1796 /* 1797 * First, merge locally issued Opens into the list for the server. 1798 */ 1799 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1800 while (dp != NULL) { 1801 ndp = TAILQ_NEXT(dp, nfsdl_list); 1802 owp = LIST_FIRST(&dp->nfsdl_owner); 1803 while (owp != NULL) { 1804 nowp = LIST_NEXT(owp, nfsow_list); 1805 op = LIST_FIRST(&owp->nfsow_open); 1806 if (op != NULL) { 1807 if (LIST_NEXT(op, nfso_list) != NULL) 1808 panic("nfsclexp"); 1809 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1810 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1811 NFSV4CL_LOCKNAMELEN)) 1812 break; 1813 } 1814 if (towp != NULL) { 1815 /* Merge opens in */ 1816 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1817 if (top->nfso_fhlen == op->nfso_fhlen && 1818 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1819 op->nfso_fhlen)) { 1820 top->nfso_mode |= op->nfso_mode; 1821 top->nfso_opencnt += op->nfso_opencnt; 1822 break; 1823 } 1824 } 1825 if (top == NULL) { 1826 /* Just add the open to the owner list */ 1827 LIST_REMOVE(op, nfso_list); 1828 op->nfso_own = towp; 1829 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1830 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh, 1831 op->nfso_fhlen), op, nfso_hash); 1832 nfsstatsv1.cllocalopens--; 1833 nfsstatsv1.clopens++; 1834 } 1835 } else { 1836 /* Just add the openowner to the client list */ 1837 LIST_REMOVE(owp, nfsow_list); 1838 owp->nfsow_clp = clp; 1839 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1840 LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh, 1841 op->nfso_fhlen), op, nfso_hash); 1842 nfsstatsv1.cllocalopenowners--; 1843 nfsstatsv1.clopenowners++; 1844 nfsstatsv1.cllocalopens--; 1845 nfsstatsv1.clopens++; 1846 } 1847 } 1848 owp = nowp; 1849 } 1850 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1851 printed = 1; 1852 printf("nfsv4 expired locks lost\n"); 1853 } 1854 nfscl_cleandeleg(dp); 1855 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 1856 dp = ndp; 1857 } 1858 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1859 panic("nfsclexp"); 1860 1861 /* 1862 * Now, try and reopen against the server. 1863 */ 1864 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1865 owp->nfsow_seqid = 0; 1866 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1867 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1868 if (ret && !printed) { 1869 printed = 1; 1870 printf("nfsv4 expired locks lost\n"); 1871 } 1872 } 1873 if (LIST_EMPTY(&owp->nfsow_open)) 1874 nfscl_freeopenowner(owp, 0); 1875 } 1876 } 1877 1878 /* 1879 * This function must be called after the process represented by "own" has 1880 * exited. Must be called with CLSTATE lock held. 1881 */ 1882 static void 1883 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1884 { 1885 struct nfsclowner *owp, *nowp; 1886 struct nfscllockowner *lp; 1887 struct nfscldeleg *dp; 1888 1889 /* First, get rid of local locks on delegations. */ 1890 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1891 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1892 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1893 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1894 panic("nfscllckw"); 1895 nfscl_freelockowner(lp, 1); 1896 break; 1897 } 1898 } 1899 } 1900 owp = LIST_FIRST(&clp->nfsc_owner); 1901 while (owp != NULL) { 1902 nowp = LIST_NEXT(owp, nfsow_list); 1903 if (!NFSBCMP(owp->nfsow_owner, own, 1904 NFSV4CL_LOCKNAMELEN)) { 1905 /* 1906 * If there are children that haven't closed the 1907 * file descriptors yet, the opens will still be 1908 * here. For that case, let the renew thread clear 1909 * out the OpenOwner later. 1910 */ 1911 if (LIST_EMPTY(&owp->nfsow_open)) 1912 nfscl_freeopenowner(owp, 0); 1913 else 1914 owp->nfsow_defunct = 1; 1915 break; 1916 } 1917 owp = nowp; 1918 } 1919 } 1920 1921 /* 1922 * Find open/lock owners for processes that have exited. 1923 */ 1924 static void 1925 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1926 { 1927 struct nfsclowner *owp, *nowp; 1928 struct nfsclopen *op; 1929 struct nfscllockowner *lp, *nlp; 1930 struct nfscldeleg *dp; 1931 uint8_t own[NFSV4CL_LOCKNAMELEN]; 1932 1933 /* 1934 * All the pidhash locks must be acquired, since they are sx locks 1935 * and must be acquired before the mutexes. The pid(s) that will 1936 * be used aren't known yet, so all the locks need to be acquired. 1937 * Fortunately, this function is only performed once/sec. 1938 */ 1939 pidhash_slockall(); 1940 NFSLOCKCLSTATE(); 1941 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1942 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1943 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1944 if (LIST_EMPTY(&lp->nfsl_lock)) 1945 nfscl_emptylockowner(lp, lhp); 1946 } 1947 } 1948 if (nfscl_procdoesntexist(owp->nfsow_owner)) { 1949 memcpy(own, owp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 1950 nfscl_cleanup_common(clp, own); 1951 } 1952 } 1953 1954 /* 1955 * For the single open_owner case, these lock owners need to be 1956 * checked to see if they still exist separately. 1957 * This is because nfscl_procdoesntexist() never returns true for 1958 * the single open_owner so that the above doesn't ever call 1959 * nfscl_cleanup_common(). 1960 */ 1961 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1962 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1963 if (nfscl_procdoesntexist(lp->nfsl_owner)) { 1964 memcpy(own, lp->nfsl_owner, 1965 NFSV4CL_LOCKNAMELEN); 1966 nfscl_cleanup_common(clp, own); 1967 } 1968 } 1969 } 1970 NFSUNLOCKCLSTATE(); 1971 pidhash_sunlockall(); 1972 } 1973 1974 /* 1975 * Take the empty lock owner and move it to the local lhp list if the 1976 * associated process no longer exists. 1977 */ 1978 static void 1979 nfscl_emptylockowner(struct nfscllockowner *lp, 1980 struct nfscllockownerfhhead *lhp) 1981 { 1982 struct nfscllockownerfh *lfhp, *mylfhp; 1983 struct nfscllockowner *nlp; 1984 int fnd_it; 1985 1986 /* If not a Posix lock owner, just return. */ 1987 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1988 return; 1989 1990 fnd_it = 0; 1991 mylfhp = NULL; 1992 /* 1993 * First, search to see if this lock owner is already in the list. 1994 * If it is, then the associated process no longer exists. 1995 */ 1996 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1997 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1998 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1999 lfhp->nfslfh_len)) 2000 mylfhp = lfhp; 2001 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 2002 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 2003 NFSV4CL_LOCKNAMELEN)) 2004 fnd_it = 1; 2005 } 2006 /* If not found, check if process still exists. */ 2007 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 2008 return; 2009 2010 /* Move the lock owner over to the local list. */ 2011 if (mylfhp == NULL) { 2012 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 2013 M_NOWAIT); 2014 if (mylfhp == NULL) 2015 return; 2016 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 2017 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 2018 mylfhp->nfslfh_len); 2019 LIST_INIT(&mylfhp->nfslfh_lock); 2020 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 2021 } 2022 LIST_REMOVE(lp, nfsl_list); 2023 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 2024 } 2025 2026 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 2027 /* 2028 * Called from nfs umount to free up the clientid. 2029 */ 2030 void 2031 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p, struct nfscldeleghead *dhp) 2032 { 2033 struct nfsclclient *clp; 2034 struct ucred *cred; 2035 int igotlock; 2036 2037 /* 2038 * For the case that matters, this is the thread that set 2039 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 2040 * done to ensure that any thread executing nfscl_getcl() after 2041 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 2042 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 2043 * explanation, courtesy of Alan Cox. 2044 * What follows is a snippet from Alan Cox's email at: 2045 * https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 2046 * 2047 * 1. Set MNTK_UNMOUNTF 2048 * 2. Acquire a standard FreeBSD mutex "m". 2049 * 3. Update some data structures. 2050 * 4. Release mutex "m". 2051 * 2052 * Then, other threads that acquire "m" after step 4 has occurred will 2053 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 2054 * step 2 may or may not see MNTK_UNMOUNTF as set. 2055 */ 2056 NFSLOCKCLSTATE(); 2057 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 2058 fake_global++; 2059 NFSUNLOCKCLSTATE(); 2060 NFSLOCKCLSTATE(); 2061 } 2062 2063 clp = nmp->nm_clp; 2064 if (clp != NULL) { 2065 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 2066 panic("nfscl umount"); 2067 2068 /* 2069 * First, handshake with the nfscl renew thread, to terminate 2070 * it. 2071 */ 2072 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 2073 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 2074 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 2075 "nfsclumnt", hz); 2076 2077 /* 2078 * Now, get the exclusive lock on the client state, so 2079 * that no uses of the state are still in progress. 2080 */ 2081 do { 2082 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2083 NFSCLSTATEMUTEXPTR, NULL); 2084 } while (!igotlock); 2085 NFSUNLOCKCLSTATE(); 2086 2087 /* 2088 * Free up all the state. It will expire on the server, but 2089 * maybe we should do a SetClientId/SetClientIdConfirm so 2090 * the server throws it away? 2091 */ 2092 LIST_REMOVE(clp, nfsc_list); 2093 nfscl_delegreturnall(clp, p, dhp); 2094 cred = newnfs_getcred(); 2095 if (NFSHASNFSV4N(nmp)) { 2096 nfsrpc_destroysession(nmp, NULL, cred, p); 2097 nfsrpc_destroyclient(nmp, clp, cred, p); 2098 } else 2099 nfsrpc_setclient(nmp, clp, 0, NULL, cred, p); 2100 nfscl_cleanclient(clp); 2101 nmp->nm_clp = NULL; 2102 NFSFREECRED(cred); 2103 free(clp, M_NFSCLCLIENT); 2104 } else 2105 NFSUNLOCKCLSTATE(); 2106 } 2107 2108 /* 2109 * This function is called when a server replies with NFSERR_STALECLIENTID 2110 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 2111 * doing Opens and Locks with reclaim. If these fail, it deletes the 2112 * corresponding state. 2113 */ 2114 static void 2115 nfscl_recover(struct nfsclclient *clp, bool *retokp, struct ucred *cred, 2116 NFSPROC_T *p) 2117 { 2118 struct nfsclowner *owp, *nowp; 2119 struct nfsclopen *op, *nop; 2120 struct nfscllockowner *lp, *nlp; 2121 struct nfscllock *lop, *nlop; 2122 struct nfscldeleg *dp, *ndp, *tdp; 2123 struct nfsmount *nmp; 2124 struct ucred *tcred; 2125 struct nfsclopenhead extra_open; 2126 struct nfscldeleghead extra_deleg; 2127 struct nfsreq *rep; 2128 u_int64_t len; 2129 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 2130 int i, igotlock = 0, error, trycnt, firstlock; 2131 struct nfscllayout *lyp, *nlyp; 2132 bool recovered_one; 2133 2134 /* 2135 * First, lock the client structure, so everyone else will 2136 * block when trying to use state. 2137 */ 2138 NFSLOCKCLSTATE(); 2139 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2140 do { 2141 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2142 NFSCLSTATEMUTEXPTR, NULL); 2143 } while (!igotlock); 2144 NFSUNLOCKCLSTATE(); 2145 2146 nmp = clp->nfsc_nmp; 2147 if (nmp == NULL) 2148 panic("nfscl recover"); 2149 2150 /* 2151 * For now, just get rid of all layouts. There may be a need 2152 * to do LayoutCommit Ops with reclaim == true later. 2153 */ 2154 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 2155 nfscl_freelayout(lyp); 2156 TAILQ_INIT(&clp->nfsc_layout); 2157 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 2158 LIST_INIT(&clp->nfsc_layouthash[i]); 2159 2160 trycnt = 5; 2161 tcred = NULL; 2162 do { 2163 error = nfsrpc_setclient(nmp, clp, 1, retokp, cred, p); 2164 } while ((error == NFSERR_STALECLIENTID || 2165 error == NFSERR_BADSESSION || 2166 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2167 if (error) { 2168 NFSLOCKCLSTATE(); 2169 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 2170 NFSCLFLAGS_RECVRINPROG); 2171 wakeup(&clp->nfsc_flags); 2172 nfsv4_unlock(&clp->nfsc_lock, 0); 2173 NFSUNLOCKCLSTATE(); 2174 return; 2175 } 2176 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2177 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2178 2179 /* 2180 * Mark requests already queued on the server, so that they don't 2181 * initiate another recovery cycle. Any requests already in the 2182 * queue that handle state information will have the old stale 2183 * clientid/stateid and will get a NFSERR_STALESTATEID, 2184 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 2185 * This will be translated to NFSERR_STALEDONTRECOVER when 2186 * R_DONTRECOVER is set. 2187 */ 2188 NFSLOCKREQ(); 2189 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 2190 if (rep->r_nmp == nmp) 2191 rep->r_flags |= R_DONTRECOVER; 2192 } 2193 NFSUNLOCKREQ(); 2194 2195 /* 2196 * If nfsrpc_setclient() returns *retokp == true, 2197 * no more recovery is needed. 2198 */ 2199 if (*retokp) 2200 goto out; 2201 2202 /* 2203 * Now, mark all delegations "need reclaim". 2204 */ 2205 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 2206 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 2207 2208 TAILQ_INIT(&extra_deleg); 2209 LIST_INIT(&extra_open); 2210 /* 2211 * Now traverse the state lists, doing Open and Lock Reclaims. 2212 */ 2213 tcred = newnfs_getcred(); 2214 recovered_one = false; 2215 owp = LIST_FIRST(&clp->nfsc_owner); 2216 while (owp != NULL) { 2217 nowp = LIST_NEXT(owp, nfsow_list); 2218 owp->nfsow_seqid = 0; 2219 op = LIST_FIRST(&owp->nfsow_open); 2220 while (op != NULL) { 2221 nop = LIST_NEXT(op, nfso_list); 2222 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2223 /* Search for a delegation to reclaim with the open */ 2224 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2225 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2226 continue; 2227 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2228 mode = NFSV4OPEN_ACCESSWRITE; 2229 delegtype = NFSV4OPEN_DELEGATEWRITE; 2230 } else { 2231 mode = NFSV4OPEN_ACCESSREAD; 2232 delegtype = NFSV4OPEN_DELEGATEREAD; 2233 } 2234 if ((op->nfso_mode & mode) == mode && 2235 op->nfso_fhlen == dp->nfsdl_fhlen && 2236 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 2237 break; 2238 } 2239 ndp = dp; 2240 if (dp == NULL) 2241 delegtype = NFSV4OPEN_DELEGATENONE; 2242 newnfs_copycred(&op->nfso_cred, tcred); 2243 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2244 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2245 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2246 tcred, p); 2247 if (!error) { 2248 recovered_one = true; 2249 /* Handle any replied delegation */ 2250 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2251 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2252 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2253 mode = NFSV4OPEN_ACCESSWRITE; 2254 else 2255 mode = NFSV4OPEN_ACCESSREAD; 2256 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2257 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2258 continue; 2259 if ((op->nfso_mode & mode) == mode && 2260 op->nfso_fhlen == dp->nfsdl_fhlen && 2261 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2262 op->nfso_fhlen)) { 2263 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2264 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2265 dp->nfsdl_ace = ndp->nfsdl_ace; 2266 dp->nfsdl_change = ndp->nfsdl_change; 2267 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2268 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2269 dp->nfsdl_flags |= NFSCLDL_RECALL; 2270 free(ndp, M_NFSCLDELEG); 2271 ndp = NULL; 2272 break; 2273 } 2274 } 2275 } 2276 if (ndp != NULL) 2277 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2278 2279 /* and reclaim all byte range locks */ 2280 lp = LIST_FIRST(&op->nfso_lock); 2281 while (lp != NULL) { 2282 nlp = LIST_NEXT(lp, nfsl_list); 2283 lp->nfsl_seqid = 0; 2284 firstlock = 1; 2285 lop = LIST_FIRST(&lp->nfsl_lock); 2286 while (lop != NULL) { 2287 nlop = LIST_NEXT(lop, nfslo_list); 2288 if (lop->nfslo_end == NFS64BITSSET) 2289 len = NFS64BITSSET; 2290 else 2291 len = lop->nfslo_end - lop->nfslo_first; 2292 error = nfscl_trylock(nmp, NULL, 2293 op->nfso_fh, op->nfso_fhlen, lp, 2294 firstlock, 1, lop->nfslo_first, len, 2295 lop->nfslo_type, tcred, p); 2296 if (error != 0) 2297 nfscl_freelock(lop, 0); 2298 else 2299 firstlock = 0; 2300 lop = nlop; 2301 } 2302 /* If no locks, but a lockowner, just delete it. */ 2303 if (LIST_EMPTY(&lp->nfsl_lock)) 2304 nfscl_freelockowner(lp, 0); 2305 lp = nlp; 2306 } 2307 } else 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 goto out; 2322 } 2323 } 2324 if (error != 0 && error != NFSERR_BADSESSION) 2325 nfscl_freeopen(op, 0, true); 2326 op = nop; 2327 } 2328 owp = nowp; 2329 } 2330 2331 /* 2332 * Now, try and get any delegations not yet reclaimed by cobbling 2333 * to-gether an appropriate open. 2334 */ 2335 nowp = NULL; 2336 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2337 while (dp != NULL) { 2338 ndp = TAILQ_NEXT(dp, nfsdl_list); 2339 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2340 if (nowp == NULL) { 2341 nowp = malloc( 2342 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2343 /* 2344 * Name must be as long an largest possible 2345 * NFSV4CL_LOCKNAMELEN. 12 for now. 2346 */ 2347 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2348 NFSV4CL_LOCKNAMELEN); 2349 LIST_INIT(&nowp->nfsow_open); 2350 nowp->nfsow_clp = clp; 2351 nowp->nfsow_seqid = 0; 2352 nowp->nfsow_defunct = 0; 2353 nfscl_lockinit(&nowp->nfsow_rwlock); 2354 } 2355 nop = NULL; 2356 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2357 nop = malloc(sizeof (struct nfsclopen) + 2358 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2359 nop->nfso_own = nowp; 2360 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2361 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2362 delegtype = NFSV4OPEN_DELEGATEWRITE; 2363 } else { 2364 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2365 delegtype = NFSV4OPEN_DELEGATEREAD; 2366 } 2367 nop->nfso_opencnt = 0; 2368 nop->nfso_posixlock = 1; 2369 nop->nfso_fhlen = dp->nfsdl_fhlen; 2370 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2371 LIST_INIT(&nop->nfso_lock); 2372 nop->nfso_stateid.seqid = 0; 2373 nop->nfso_stateid.other[0] = 0; 2374 nop->nfso_stateid.other[1] = 0; 2375 nop->nfso_stateid.other[2] = 0; 2376 newnfs_copycred(&dp->nfsdl_cred, tcred); 2377 newnfs_copyincred(tcred, &nop->nfso_cred); 2378 tdp = NULL; 2379 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2380 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2381 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2382 delegtype, tcred, p); 2383 if (tdp != NULL) { 2384 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2385 mode = NFSV4OPEN_ACCESSWRITE; 2386 else 2387 mode = NFSV4OPEN_ACCESSREAD; 2388 if ((nop->nfso_mode & mode) == mode && 2389 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2390 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2391 nop->nfso_fhlen)) { 2392 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2393 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2394 dp->nfsdl_ace = tdp->nfsdl_ace; 2395 dp->nfsdl_change = tdp->nfsdl_change; 2396 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2397 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2398 dp->nfsdl_flags |= NFSCLDL_RECALL; 2399 free(tdp, M_NFSCLDELEG); 2400 } else { 2401 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2402 } 2403 } 2404 } 2405 if (error) { 2406 if (nop != NULL) 2407 free(nop, M_NFSCLOPEN); 2408 if (error == NFSERR_NOGRACE && !recovered_one && 2409 NFSHASNFSV4N(nmp)) { 2410 /* 2411 * For NFSv4.1/4.2, the NFSERR_EXPIRED case will 2412 * actually end up here, since the client will do 2413 * a recovery for NFSERR_BADSESSION, but will get 2414 * an NFSERR_NOGRACE reply for the first "reclaim" 2415 * attempt. 2416 * So, call nfscl_expireclient() to recover the 2417 * opens as best we can and then do a reclaim 2418 * complete and return. 2419 */ 2420 nfsrpc_reclaimcomplete(nmp, cred, p); 2421 nfscl_expireclient(clp, nmp, tcred, p); 2422 free(nowp, M_NFSCLOWNER); 2423 goto out; 2424 } 2425 /* 2426 * Couldn't reclaim it, so throw the state 2427 * away. Ouch!! 2428 */ 2429 nfscl_cleandeleg(dp); 2430 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 2431 } else { 2432 recovered_one = true; 2433 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2434 } 2435 } 2436 dp = ndp; 2437 } 2438 2439 /* 2440 * Now, get rid of extra Opens and Delegations. 2441 */ 2442 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2443 do { 2444 newnfs_copycred(&op->nfso_cred, tcred); 2445 error = nfscl_tryclose(op, tcred, nmp, p, true); 2446 if (error == NFSERR_GRACE) 2447 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2448 } while (error == NFSERR_GRACE); 2449 LIST_REMOVE(op, nfso_list); 2450 free(op, M_NFSCLOPEN); 2451 } 2452 if (nowp != NULL) 2453 free(nowp, M_NFSCLOWNER); 2454 2455 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2456 do { 2457 newnfs_copycred(&dp->nfsdl_cred, tcred); 2458 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2459 if (error == NFSERR_GRACE) 2460 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2461 } while (error == NFSERR_GRACE); 2462 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2463 free(dp, M_NFSCLDELEG); 2464 } 2465 2466 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2467 if (NFSHASNFSV4N(nmp)) 2468 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2469 2470 out: 2471 NFSLOCKCLSTATE(); 2472 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2473 wakeup(&clp->nfsc_flags); 2474 nfsv4_unlock(&clp->nfsc_lock, 0); 2475 NFSUNLOCKCLSTATE(); 2476 if (tcred != NULL) 2477 NFSFREECRED(tcred); 2478 } 2479 2480 /* 2481 * This function is called when a server replies with NFSERR_EXPIRED. 2482 * It deletes all state for the client and does a fresh SetClientId/confirm. 2483 * XXX Someday it should post a signal to the process(es) that hold the 2484 * state, so they know that lock state has been lost. 2485 */ 2486 int 2487 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2488 { 2489 struct nfsmount *nmp; 2490 struct ucred *cred; 2491 int igotlock = 0, error, trycnt; 2492 2493 /* 2494 * If the clientid has gone away or a new SetClientid has already 2495 * been done, just return ok. 2496 */ 2497 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2498 return (0); 2499 2500 /* 2501 * First, lock the client structure, so everyone else will 2502 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2503 * that only one thread does the work. 2504 */ 2505 NFSLOCKCLSTATE(); 2506 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2507 do { 2508 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2509 NFSCLSTATEMUTEXPTR, NULL); 2510 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2511 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2512 if (igotlock) 2513 nfsv4_unlock(&clp->nfsc_lock, 0); 2514 NFSUNLOCKCLSTATE(); 2515 return (0); 2516 } 2517 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2518 NFSUNLOCKCLSTATE(); 2519 2520 nmp = clp->nfsc_nmp; 2521 if (nmp == NULL) 2522 panic("nfscl expired"); 2523 cred = newnfs_getcred(); 2524 trycnt = 5; 2525 do { 2526 error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p); 2527 } while ((error == NFSERR_STALECLIENTID || 2528 error == NFSERR_BADSESSION || 2529 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2530 if (error) { 2531 NFSLOCKCLSTATE(); 2532 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2533 } else { 2534 /* 2535 * Expire the state for the client. 2536 */ 2537 nfscl_expireclient(clp, nmp, cred, p); 2538 NFSLOCKCLSTATE(); 2539 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2540 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2541 } 2542 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2543 wakeup(&clp->nfsc_flags); 2544 nfsv4_unlock(&clp->nfsc_lock, 0); 2545 NFSUNLOCKCLSTATE(); 2546 NFSFREECRED(cred); 2547 return (error); 2548 } 2549 2550 /* 2551 * This function inserts a lock in the list after insert_lop. 2552 */ 2553 static void 2554 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2555 struct nfscllock *insert_lop, int local) 2556 { 2557 2558 if ((struct nfscllockowner *)insert_lop == lp) 2559 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2560 else 2561 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2562 if (local) 2563 nfsstatsv1.cllocallocks++; 2564 else 2565 nfsstatsv1.cllocks++; 2566 } 2567 2568 /* 2569 * This function updates the locking for a lock owner and given file. It 2570 * maintains a list of lock ranges ordered on increasing file offset that 2571 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2572 * It always adds new_lop to the list and sometimes uses the one pointed 2573 * at by other_lopp. 2574 * Returns 1 if the locks were modified, 0 otherwise. 2575 */ 2576 static int 2577 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2578 struct nfscllock **other_lopp, int local) 2579 { 2580 struct nfscllock *new_lop = *new_lopp; 2581 struct nfscllock *lop, *tlop, *ilop; 2582 struct nfscllock *other_lop; 2583 int unlock = 0, modified = 0; 2584 u_int64_t tmp; 2585 2586 /* 2587 * Work down the list until the lock is merged. 2588 */ 2589 if (new_lop->nfslo_type == F_UNLCK) 2590 unlock = 1; 2591 ilop = (struct nfscllock *)lp; 2592 lop = LIST_FIRST(&lp->nfsl_lock); 2593 while (lop != NULL) { 2594 /* 2595 * Only check locks for this file that aren't before the start of 2596 * new lock's range. 2597 */ 2598 if (lop->nfslo_end >= new_lop->nfslo_first) { 2599 if (new_lop->nfslo_end < lop->nfslo_first) { 2600 /* 2601 * If the new lock ends before the start of the 2602 * current lock's range, no merge, just insert 2603 * the new lock. 2604 */ 2605 break; 2606 } 2607 if (new_lop->nfslo_type == lop->nfslo_type || 2608 (new_lop->nfslo_first <= lop->nfslo_first && 2609 new_lop->nfslo_end >= lop->nfslo_end)) { 2610 /* 2611 * This lock can be absorbed by the new lock/unlock. 2612 * This happens when it covers the entire range 2613 * of the old lock or is contiguous 2614 * with the old lock and is of the same type or an 2615 * unlock. 2616 */ 2617 if (new_lop->nfslo_type != lop->nfslo_type || 2618 new_lop->nfslo_first != lop->nfslo_first || 2619 new_lop->nfslo_end != lop->nfslo_end) 2620 modified = 1; 2621 if (lop->nfslo_first < new_lop->nfslo_first) 2622 new_lop->nfslo_first = lop->nfslo_first; 2623 if (lop->nfslo_end > new_lop->nfslo_end) 2624 new_lop->nfslo_end = lop->nfslo_end; 2625 tlop = lop; 2626 lop = LIST_NEXT(lop, nfslo_list); 2627 nfscl_freelock(tlop, local); 2628 continue; 2629 } 2630 2631 /* 2632 * All these cases are for contiguous locks that are not the 2633 * same type, so they can't be merged. 2634 */ 2635 if (new_lop->nfslo_first <= lop->nfslo_first) { 2636 /* 2637 * This case is where the new lock overlaps with the 2638 * first part of the old lock. Move the start of the 2639 * old lock to just past the end of the new lock. The 2640 * new lock will be inserted in front of the old, since 2641 * ilop hasn't been updated. (We are done now.) 2642 */ 2643 if (lop->nfslo_first != new_lop->nfslo_end) { 2644 lop->nfslo_first = new_lop->nfslo_end; 2645 modified = 1; 2646 } 2647 break; 2648 } 2649 if (new_lop->nfslo_end >= lop->nfslo_end) { 2650 /* 2651 * This case is where the new lock overlaps with the 2652 * end of the old lock's range. Move the old lock's 2653 * end to just before the new lock's first and insert 2654 * the new lock after the old lock. 2655 * Might not be done yet, since the new lock could 2656 * overlap further locks with higher ranges. 2657 */ 2658 if (lop->nfslo_end != new_lop->nfslo_first) { 2659 lop->nfslo_end = new_lop->nfslo_first; 2660 modified = 1; 2661 } 2662 ilop = lop; 2663 lop = LIST_NEXT(lop, nfslo_list); 2664 continue; 2665 } 2666 /* 2667 * The final case is where the new lock's range is in the 2668 * middle of the current lock's and splits the current lock 2669 * up. Use *other_lopp to handle the second part of the 2670 * split old lock range. (We are done now.) 2671 * For unlock, we use new_lop as other_lop and tmp, since 2672 * other_lop and new_lop are the same for this case. 2673 * We noted the unlock case above, so we don't need 2674 * new_lop->nfslo_type any longer. 2675 */ 2676 tmp = new_lop->nfslo_first; 2677 if (unlock) { 2678 other_lop = new_lop; 2679 *new_lopp = NULL; 2680 } else { 2681 other_lop = *other_lopp; 2682 *other_lopp = NULL; 2683 } 2684 other_lop->nfslo_first = new_lop->nfslo_end; 2685 other_lop->nfslo_end = lop->nfslo_end; 2686 other_lop->nfslo_type = lop->nfslo_type; 2687 lop->nfslo_end = tmp; 2688 nfscl_insertlock(lp, other_lop, lop, local); 2689 ilop = lop; 2690 modified = 1; 2691 break; 2692 } 2693 ilop = lop; 2694 lop = LIST_NEXT(lop, nfslo_list); 2695 if (lop == NULL) 2696 break; 2697 } 2698 2699 /* 2700 * Insert the new lock in the list at the appropriate place. 2701 */ 2702 if (!unlock) { 2703 nfscl_insertlock(lp, new_lop, ilop, local); 2704 *new_lopp = NULL; 2705 modified = 1; 2706 } 2707 return (modified); 2708 } 2709 2710 /* 2711 * This function must be run as a kernel thread. 2712 * It does Renew Ops and recovery, when required. 2713 */ 2714 void 2715 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2716 { 2717 struct nfsclowner *owp, *nowp; 2718 struct nfsclopen *op; 2719 struct nfscllockowner *lp, *nlp; 2720 struct nfscldeleghead dh; 2721 struct nfscldeleg *dp, *ndp; 2722 struct ucred *cred; 2723 u_int32_t clidrev; 2724 int error, cbpathdown, islept, igotlock, ret, clearok; 2725 uint32_t recover_done_time = 0; 2726 time_t mytime; 2727 static time_t prevsec = 0; 2728 struct nfscllockownerfh *lfhp, *nlfhp; 2729 struct nfscllockownerfhhead lfh; 2730 struct nfscllayout *lyp, *nlyp; 2731 struct nfscldevinfo *dip, *ndip; 2732 struct nfscllayouthead rlh; 2733 struct nfsclrecalllayout *recallp; 2734 struct nfsclds *dsp; 2735 bool retok; 2736 struct mount *mp; 2737 vnode_t vp; 2738 2739 cred = newnfs_getcred(); 2740 NFSLOCKCLSTATE(); 2741 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2742 mp = clp->nfsc_nmp->nm_mountp; 2743 NFSUNLOCKCLSTATE(); 2744 for(;;) { 2745 newnfs_setroot(cred); 2746 cbpathdown = 0; 2747 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2748 /* 2749 * Only allow one full recover within 1/2 of the lease 2750 * duration (nfsc_renew). 2751 * retok is value/result. If passed in set to true, 2752 * it indicates only a CreateSession operation should 2753 * be attempted. 2754 * If it is returned true, it indicates that the 2755 * recovery only required a CreateSession. 2756 */ 2757 retok = true; 2758 if (recover_done_time < NFSD_MONOSEC) { 2759 recover_done_time = NFSD_MONOSEC + 2760 clp->nfsc_renew; 2761 retok = false; 2762 } 2763 NFSCL_DEBUG(1, "Doing recovery, only " 2764 "createsession=%d\n", retok); 2765 nfscl_recover(clp, &retok, cred, p); 2766 } 2767 if (clp->nfsc_expire <= NFSD_MONOSEC && 2768 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2769 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2770 clidrev = clp->nfsc_clientidrev; 2771 error = nfsrpc_renew(clp, NULL, cred, p); 2772 if (error == NFSERR_CBPATHDOWN) 2773 cbpathdown = 1; 2774 else if (error == NFSERR_STALECLIENTID) { 2775 NFSLOCKCLSTATE(); 2776 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2777 NFSUNLOCKCLSTATE(); 2778 } else if (error == NFSERR_EXPIRED) 2779 (void) nfscl_hasexpired(clp, clidrev, p); 2780 } 2781 2782 checkdsrenew: 2783 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2784 /* Do renews for any DS sessions. */ 2785 NFSLOCKMNT(clp->nfsc_nmp); 2786 /* Skip first entry, since the MDS is handled above. */ 2787 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2788 if (dsp != NULL) 2789 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2790 while (dsp != NULL) { 2791 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2792 dsp->nfsclds_sess.nfsess_defunct == 0) { 2793 dsp->nfsclds_expire = NFSD_MONOSEC + 2794 clp->nfsc_renew; 2795 NFSUNLOCKMNT(clp->nfsc_nmp); 2796 (void)nfsrpc_renew(clp, dsp, cred, p); 2797 goto checkdsrenew; 2798 } 2799 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2800 } 2801 NFSUNLOCKMNT(clp->nfsc_nmp); 2802 } 2803 2804 TAILQ_INIT(&dh); 2805 NFSLOCKCLSTATE(); 2806 if (cbpathdown) 2807 /* It's a Total Recall! */ 2808 nfscl_totalrecall(clp); 2809 2810 /* 2811 * Now, handle defunct owners. 2812 */ 2813 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2814 if (LIST_EMPTY(&owp->nfsow_open)) { 2815 if (owp->nfsow_defunct != 0) 2816 nfscl_freeopenowner(owp, 0); 2817 } 2818 } 2819 2820 /* 2821 * Do the recall on any delegations. To avoid trouble, always 2822 * come back up here after having slept. 2823 */ 2824 igotlock = 0; 2825 tryagain: 2826 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2827 while (dp != NULL) { 2828 ndp = TAILQ_NEXT(dp, nfsdl_list); 2829 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2830 /* 2831 * Wait for outstanding I/O ops to be done. 2832 */ 2833 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2834 if (igotlock) { 2835 nfsv4_unlock(&clp->nfsc_lock, 0); 2836 igotlock = 0; 2837 } 2838 dp->nfsdl_rwlock.nfslock_lock |= 2839 NFSV4LOCK_WANTED; 2840 msleep(&dp->nfsdl_rwlock, 2841 NFSCLSTATEMUTEXPTR, PVFS, "nfscld", 2842 5 * hz); 2843 if (NFSCL_FORCEDISM(mp)) 2844 goto terminate; 2845 goto tryagain; 2846 } 2847 while (!igotlock) { 2848 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2849 &islept, NFSCLSTATEMUTEXPTR, mp); 2850 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) 2851 goto terminate; 2852 if (islept) 2853 goto tryagain; 2854 } 2855 NFSUNLOCKCLSTATE(); 2856 newnfs_copycred(&dp->nfsdl_cred, cred); 2857 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2858 NULL, cred, p, 1, &vp); 2859 if (!ret) { 2860 nfscl_cleandeleg(dp); 2861 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2862 nfsdl_list); 2863 LIST_REMOVE(dp, nfsdl_hash); 2864 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2865 nfscl_delegcnt--; 2866 nfsstatsv1.cldelegates--; 2867 } 2868 NFSLOCKCLSTATE(); 2869 /* 2870 * The nfsc_lock must be released before doing 2871 * vrele(), since it might call nfs_inactive(). 2872 * For the unlikely case where the vnode failed 2873 * to be acquired by nfscl_recalldeleg(), a 2874 * VOP_RECLAIM() should be in progress and it 2875 * will return the delegation. 2876 */ 2877 nfsv4_unlock(&clp->nfsc_lock, 0); 2878 igotlock = 0; 2879 if (vp != NULL) { 2880 NFSUNLOCKCLSTATE(); 2881 vrele(vp); 2882 NFSLOCKCLSTATE(); 2883 } 2884 goto tryagain; 2885 } 2886 dp = ndp; 2887 } 2888 2889 /* 2890 * Clear out old delegations, if we are above the high water 2891 * mark. Only clear out ones with no state related to them. 2892 * The tailq list is in LRU order. 2893 */ 2894 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2895 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2896 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2897 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2898 dp->nfsdl_rwlock.nfslock_lock == 0 && 2899 dp->nfsdl_timestamp < NFSD_MONOSEC && 2900 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2901 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2902 clearok = 1; 2903 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2904 op = LIST_FIRST(&owp->nfsow_open); 2905 if (op != NULL) { 2906 clearok = 0; 2907 break; 2908 } 2909 } 2910 if (clearok) { 2911 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2912 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2913 clearok = 0; 2914 break; 2915 } 2916 } 2917 } 2918 if (clearok) { 2919 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2920 LIST_REMOVE(dp, nfsdl_hash); 2921 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2922 nfscl_delegcnt--; 2923 nfsstatsv1.cldelegates--; 2924 } 2925 } 2926 dp = ndp; 2927 } 2928 if (igotlock) 2929 nfsv4_unlock(&clp->nfsc_lock, 0); 2930 2931 /* 2932 * Do the recall on any layouts. To avoid trouble, always 2933 * come back up here after having slept. 2934 */ 2935 TAILQ_INIT(&rlh); 2936 tryagain2: 2937 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2938 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2939 /* 2940 * Wait for outstanding I/O ops to be done. 2941 */ 2942 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2943 (lyp->nfsly_lock.nfslock_lock & 2944 NFSV4LOCK_LOCK) != 0) { 2945 lyp->nfsly_lock.nfslock_lock |= 2946 NFSV4LOCK_WANTED; 2947 msleep(&lyp->nfsly_lock.nfslock_lock, 2948 NFSCLSTATEMUTEXPTR, PVFS, "nfslyp", 2949 5 * hz); 2950 if (NFSCL_FORCEDISM(mp)) 2951 goto terminate; 2952 goto tryagain2; 2953 } 2954 /* Move the layout to the recall list. */ 2955 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2956 nfsly_list); 2957 LIST_REMOVE(lyp, nfsly_hash); 2958 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2959 2960 /* Handle any layout commits. */ 2961 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2962 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2963 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2964 NFSUNLOCKCLSTATE(); 2965 NFSCL_DEBUG(3, "do layoutcommit\n"); 2966 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2967 cred, p); 2968 NFSLOCKCLSTATE(); 2969 goto tryagain2; 2970 } 2971 } 2972 } 2973 2974 /* Now, look for stale layouts. */ 2975 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2976 while (lyp != NULL) { 2977 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2978 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2979 (lyp->nfsly_flags & (NFSLY_RECALL | 2980 NFSLY_RETONCLOSE)) == 0 && 2981 lyp->nfsly_lock.nfslock_usecnt == 0 && 2982 lyp->nfsly_lock.nfslock_lock == 0) { 2983 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2984 nfscl_layoutcnt); 2985 recallp = malloc(sizeof(*recallp), 2986 M_NFSLAYRECALL, M_NOWAIT); 2987 if (recallp == NULL) 2988 break; 2989 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2990 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2991 lyp->nfsly_stateid.seqid, 0, 0, NULL, 2992 recallp); 2993 } 2994 lyp = nlyp; 2995 } 2996 2997 /* 2998 * Free up any unreferenced device info structures. 2999 */ 3000 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 3001 if (dip->nfsdi_layoutrefs == 0 && 3002 dip->nfsdi_refcnt == 0) { 3003 NFSCL_DEBUG(4, "freeing devinfo\n"); 3004 LIST_REMOVE(dip, nfsdi_list); 3005 nfscl_freedevinfo(dip); 3006 } 3007 } 3008 NFSUNLOCKCLSTATE(); 3009 3010 /* Do layout return(s), as required. */ 3011 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 3012 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 3013 NFSCL_DEBUG(4, "ret layout\n"); 3014 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 3015 if ((lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) { 3016 NFSLOCKCLSTATE(); 3017 lyp->nfsly_flags |= NFSLY_RETURNED; 3018 wakeup(lyp); 3019 NFSUNLOCKCLSTATE(); 3020 } else 3021 nfscl_freelayout(lyp); 3022 } 3023 3024 /* 3025 * Delegreturn any delegations cleaned out or recalled. 3026 */ 3027 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 3028 newnfs_copycred(&dp->nfsdl_cred, cred); 3029 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3030 TAILQ_REMOVE(&dh, dp, nfsdl_list); 3031 free(dp, M_NFSCLDELEG); 3032 } 3033 3034 SLIST_INIT(&lfh); 3035 /* 3036 * Call nfscl_cleanupkext() once per second to check for 3037 * open/lock owners where the process has exited. 3038 */ 3039 mytime = NFSD_MONOSEC; 3040 if (prevsec != mytime) { 3041 prevsec = mytime; 3042 nfscl_cleanupkext(clp, &lfh); 3043 } 3044 3045 /* 3046 * Do a ReleaseLockOwner for all lock owners where the 3047 * associated process no longer exists, as found by 3048 * nfscl_cleanupkext(). 3049 */ 3050 newnfs_setroot(cred); 3051 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 3052 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 3053 nlp) { 3054 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 3055 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 3056 p); 3057 nfscl_freelockowner(lp, 0); 3058 } 3059 free(lfhp, M_TEMP); 3060 } 3061 SLIST_INIT(&lfh); 3062 3063 NFSLOCKCLSTATE(); 3064 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 3065 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 3066 hz); 3067 terminate: 3068 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 3069 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 3070 NFSUNLOCKCLSTATE(); 3071 NFSFREECRED(cred); 3072 wakeup((caddr_t)clp); 3073 return; 3074 } 3075 NFSUNLOCKCLSTATE(); 3076 } 3077 } 3078 3079 /* 3080 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 3081 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 3082 */ 3083 void 3084 nfscl_initiate_recovery(struct nfsclclient *clp) 3085 { 3086 3087 if (clp == NULL) 3088 return; 3089 NFSLOCKCLSTATE(); 3090 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 3091 NFSUNLOCKCLSTATE(); 3092 wakeup((caddr_t)clp); 3093 } 3094 3095 /* 3096 * Dump out the state stuff for debugging. 3097 */ 3098 void 3099 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 3100 int lockowner, int locks) 3101 { 3102 struct nfsclclient *clp; 3103 struct nfsclowner *owp; 3104 struct nfsclopen *op; 3105 struct nfscllockowner *lp; 3106 struct nfscllock *lop; 3107 struct nfscldeleg *dp; 3108 3109 clp = nmp->nm_clp; 3110 if (clp == NULL) { 3111 printf("nfscl dumpstate NULL clp\n"); 3112 return; 3113 } 3114 NFSLOCKCLSTATE(); 3115 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 3116 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3117 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 3118 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 3119 owp->nfsow_owner[0], owp->nfsow_owner[1], 3120 owp->nfsow_owner[2], owp->nfsow_owner[3], 3121 owp->nfsow_seqid); 3122 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3123 if (opens) 3124 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 3125 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 3126 op->nfso_stateid.other[2], op->nfso_opencnt, 3127 op->nfso_fh[12]); 3128 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 3129 if (lockowner) 3130 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 3131 lp->nfsl_owner[0], lp->nfsl_owner[1], 3132 lp->nfsl_owner[2], lp->nfsl_owner[3], 3133 lp->nfsl_seqid, 3134 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 3135 lp->nfsl_stateid.other[2]); 3136 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3137 if (locks) 3138 #ifdef __FreeBSD__ 3139 printf("lck typ=%d fst=%ju end=%ju\n", 3140 lop->nfslo_type, (intmax_t)lop->nfslo_first, 3141 (intmax_t)lop->nfslo_end); 3142 #else 3143 printf("lck typ=%d fst=%qd end=%qd\n", 3144 lop->nfslo_type, lop->nfslo_first, 3145 lop->nfslo_end); 3146 #endif 3147 } 3148 } 3149 } 3150 } 3151 } 3152 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3153 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 3154 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 3155 owp->nfsow_owner[0], owp->nfsow_owner[1], 3156 owp->nfsow_owner[2], owp->nfsow_owner[3], 3157 owp->nfsow_seqid); 3158 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3159 if (opens) 3160 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 3161 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 3162 op->nfso_stateid.other[2], op->nfso_opencnt, 3163 op->nfso_fh[12]); 3164 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 3165 if (lockowner) 3166 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 3167 lp->nfsl_owner[0], lp->nfsl_owner[1], 3168 lp->nfsl_owner[2], lp->nfsl_owner[3], 3169 lp->nfsl_seqid, 3170 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 3171 lp->nfsl_stateid.other[2]); 3172 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3173 if (locks) 3174 #ifdef __FreeBSD__ 3175 printf("lck typ=%d fst=%ju end=%ju\n", 3176 lop->nfslo_type, (intmax_t)lop->nfslo_first, 3177 (intmax_t)lop->nfslo_end); 3178 #else 3179 printf("lck typ=%d fst=%qd end=%qd\n", 3180 lop->nfslo_type, lop->nfslo_first, 3181 lop->nfslo_end); 3182 #endif 3183 } 3184 } 3185 } 3186 } 3187 NFSUNLOCKCLSTATE(); 3188 } 3189 3190 /* 3191 * Check for duplicate open owners and opens. 3192 * (Only used as a diagnostic aid.) 3193 */ 3194 void 3195 nfscl_dupopen(vnode_t vp, int dupopens) 3196 { 3197 struct nfsclclient *clp; 3198 struct nfsclowner *owp, *owp2; 3199 struct nfsclopen *op, *op2; 3200 struct nfsfh *nfhp; 3201 3202 clp = VFSTONFS(vp->v_mount)->nm_clp; 3203 if (clp == NULL) { 3204 printf("nfscl dupopen NULL clp\n"); 3205 return; 3206 } 3207 nfhp = VTONFS(vp)->n_fhp; 3208 NFSLOCKCLSTATE(); 3209 3210 /* 3211 * First, search for duplicate owners. 3212 * These should never happen! 3213 */ 3214 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3215 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3216 if (owp != owp2 && 3217 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 3218 NFSV4CL_LOCKNAMELEN)) { 3219 NFSUNLOCKCLSTATE(); 3220 printf("DUP OWNER\n"); 3221 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0); 3222 return; 3223 } 3224 } 3225 } 3226 3227 /* 3228 * Now, search for duplicate stateids. 3229 * These shouldn't happen, either. 3230 */ 3231 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3232 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3233 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3234 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3235 if (op != op2 && 3236 (op->nfso_stateid.other[0] != 0 || 3237 op->nfso_stateid.other[1] != 0 || 3238 op->nfso_stateid.other[2] != 0) && 3239 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 3240 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 3241 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 3242 NFSUNLOCKCLSTATE(); 3243 printf("DUP STATEID\n"); 3244 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0); 3245 return; 3246 } 3247 } 3248 } 3249 } 3250 } 3251 3252 /* 3253 * Now search for duplicate opens. 3254 * Duplicate opens for the same owner 3255 * should never occur. Other duplicates are 3256 * possible and are checked for if "dupopens" 3257 * is true. 3258 */ 3259 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3260 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3261 if (nfhp->nfh_len == op2->nfso_fhlen && 3262 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 3263 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3264 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3265 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 3266 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 3267 (!NFSBCMP(op->nfso_own->nfsow_owner, 3268 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 3269 dupopens)) { 3270 if (!NFSBCMP(op->nfso_own->nfsow_owner, 3271 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3272 NFSUNLOCKCLSTATE(); 3273 printf("BADDUP OPEN\n"); 3274 } else { 3275 NFSUNLOCKCLSTATE(); 3276 printf("DUP OPEN\n"); 3277 } 3278 nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 3279 0); 3280 return; 3281 } 3282 } 3283 } 3284 } 3285 } 3286 } 3287 NFSUNLOCKCLSTATE(); 3288 } 3289 3290 /* 3291 * During close, find an open that needs to be dereferenced and 3292 * dereference it. If there are no more opens for this file, 3293 * log a message to that effect. 3294 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 3295 * on the file's vnode. 3296 * This is the safe way, since it is difficult to identify 3297 * which open the close is for and I/O can be performed after the 3298 * close(2) system call when a file is mmap'd. 3299 * If it returns 0 for success, there will be a referenced 3300 * clp returned via clpp. 3301 */ 3302 int 3303 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 3304 { 3305 struct nfsclclient *clp; 3306 struct nfsclowner *owp; 3307 struct nfsclopen *op; 3308 struct nfscldeleg *dp; 3309 struct nfsfh *nfhp; 3310 int error, notdecr; 3311 3312 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp); 3313 if (error) 3314 return (error); 3315 *clpp = clp; 3316 3317 nfhp = VTONFS(vp)->n_fhp; 3318 notdecr = 1; 3319 NFSLOCKCLSTATE(); 3320 /* 3321 * First, look for one under a delegation that was locally issued 3322 * and just decrement the opencnt for it. Since all my Opens against 3323 * the server are DENY_NONE, I don't see a problem with hanging 3324 * onto them. (It is much easier to use one of the extant Opens 3325 * that I already have on the server when a Delegation is recalled 3326 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3327 */ 3328 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3329 if (dp != NULL) { 3330 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3331 op = LIST_FIRST(&owp->nfsow_open); 3332 if (op != NULL) { 3333 /* 3334 * Since a delegation is for a file, there 3335 * should never be more than one open for 3336 * each openowner. 3337 */ 3338 if (LIST_NEXT(op, nfso_list) != NULL) 3339 panic("nfscdeleg opens"); 3340 if (notdecr && op->nfso_opencnt > 0) { 3341 notdecr = 0; 3342 op->nfso_opencnt--; 3343 break; 3344 } 3345 } 3346 } 3347 } 3348 3349 /* Now process the opens against the server. */ 3350 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len), 3351 nfso_hash) { 3352 if (op->nfso_fhlen == nfhp->nfh_len && 3353 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3354 nfhp->nfh_len)) { 3355 /* Found an open, decrement cnt if possible */ 3356 if (notdecr && op->nfso_opencnt > 0) { 3357 notdecr = 0; 3358 op->nfso_opencnt--; 3359 } 3360 /* 3361 * There are more opens, so just return. 3362 */ 3363 if (op->nfso_opencnt > 0) { 3364 NFSUNLOCKCLSTATE(); 3365 return (0); 3366 } 3367 } 3368 } 3369 NFSUNLOCKCLSTATE(); 3370 if (notdecr) 3371 printf("nfscl: never fnd open\n"); 3372 return (0); 3373 } 3374 3375 int 3376 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3377 { 3378 struct nfsclclient *clp; 3379 struct nfsmount *nmp; 3380 struct nfsclowner *owp, *nowp; 3381 struct nfsclopen *op, *nop; 3382 struct nfsclopenhead delayed; 3383 struct nfscldeleg *dp; 3384 struct nfsfh *nfhp; 3385 struct nfsclrecalllayout *recallp; 3386 struct nfscllayout *lyp; 3387 int error; 3388 3389 error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp); 3390 if (error) 3391 return (error); 3392 *clpp = clp; 3393 3394 nmp = VFSTONFS(vp->v_mount); 3395 nfhp = VTONFS(vp)->n_fhp; 3396 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 3397 NFSLOCKCLSTATE(); 3398 /* 3399 * First get rid of the local Open structures, which should be no 3400 * longer in use. 3401 */ 3402 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3403 if (dp != NULL) { 3404 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3405 op = LIST_FIRST(&owp->nfsow_open); 3406 if (op != NULL) { 3407 KASSERT((op->nfso_opencnt == 0), 3408 ("nfscl: bad open cnt on deleg")); 3409 nfscl_freeopen(op, 1, true); 3410 } 3411 nfscl_freeopenowner(owp, 1); 3412 } 3413 } 3414 3415 /* Return any layouts marked return on close. */ 3416 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp, 3417 &lyp); 3418 3419 /* Now process the opens against the server. */ 3420 LIST_INIT(&delayed); 3421 lookformore: 3422 LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len), 3423 nfso_hash) { 3424 if (op->nfso_fhlen == nfhp->nfh_len && 3425 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3426 nfhp->nfh_len)) { 3427 /* Found an open, close it. */ 3428 #ifdef DIAGNOSTIC 3429 KASSERT((op->nfso_opencnt == 0), 3430 ("nfscl: bad open cnt on server (%d)", 3431 op->nfso_opencnt)); 3432 #endif 3433 NFSUNLOCKCLSTATE(); 3434 if (NFSHASNFSV4N(nmp)) 3435 error = nfsrpc_doclose(nmp, op, p, false, true); 3436 else 3437 error = nfsrpc_doclose(nmp, op, p, true, true); 3438 NFSLOCKCLSTATE(); 3439 if (error == NFSERR_DELAY) { 3440 nfscl_unlinkopen(op); 3441 op->nfso_own = NULL; 3442 LIST_INSERT_HEAD(&delayed, op, nfso_list); 3443 } 3444 goto lookformore; 3445 } 3446 } 3447 nfscl_clrelease(clp); 3448 3449 /* Now, wait for any layout that is returned upon close. */ 3450 if (lyp != NULL) { 3451 while ((lyp->nfsly_flags & NFSLY_RETURNED) == 0) { 3452 if (NFSCL_FORCEDISM(nmp->nm_mountp)) { 3453 lyp = NULL; 3454 break; 3455 } 3456 msleep(lyp, NFSCLSTATEMUTEXPTR, PZERO, "nfslroc", hz); 3457 } 3458 if (lyp != NULL) 3459 nfscl_freelayout(lyp); 3460 } 3461 3462 NFSUNLOCKCLSTATE(); 3463 /* 3464 * recallp has been set NULL by nfscl_retoncloselayout() if it was 3465 * used by the function, but calling free() with a NULL pointer is ok. 3466 */ 3467 free(recallp, M_NFSLAYRECALL); 3468 3469 /* Now, loop retrying the delayed closes. */ 3470 LIST_FOREACH_SAFE(op, &delayed, nfso_list, nop) { 3471 nfsrpc_doclose(nmp, op, p, true, false); 3472 LIST_REMOVE(op, nfso_list); 3473 nfscl_freeopen(op, 0, false); 3474 } 3475 return (0); 3476 } 3477 3478 /* 3479 * Return all delegations on this client. 3480 * (Must be called with client sleep lock.) 3481 */ 3482 static void 3483 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p, 3484 struct nfscldeleghead *dhp) 3485 { 3486 struct nfscldeleg *dp, *ndp; 3487 struct ucred *cred; 3488 3489 cred = newnfs_getcred(); 3490 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3491 nfscl_cleandeleg(dp); 3492 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3493 if (dhp != NULL) { 3494 nfscl_freedeleg(&clp->nfsc_deleg, dp, false); 3495 TAILQ_INSERT_HEAD(dhp, dp, nfsdl_list); 3496 } else 3497 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 3498 } 3499 NFSFREECRED(cred); 3500 } 3501 3502 /* 3503 * Return any delegation for this vp. 3504 */ 3505 void 3506 nfscl_delegreturnvp(vnode_t vp, NFSPROC_T *p) 3507 { 3508 struct nfsclclient *clp; 3509 struct nfscldeleg *dp; 3510 struct ucred *cred; 3511 struct nfsnode *np; 3512 struct nfsmount *nmp; 3513 3514 nmp = VFSTONFS(vp->v_mount); 3515 NFSLOCKMNT(nmp); 3516 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 3517 NFSUNLOCKMNT(nmp); 3518 return; 3519 } 3520 NFSUNLOCKMNT(nmp); 3521 np = VTONFS(vp); 3522 cred = newnfs_getcred(); 3523 dp = NULL; 3524 NFSLOCKCLSTATE(); 3525 clp = nmp->nm_clp; 3526 if (clp != NULL) 3527 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 3528 np->n_fhp->nfh_len); 3529 if (dp != NULL) { 3530 nfscl_cleandeleg(dp); 3531 nfscl_freedeleg(&clp->nfsc_deleg, dp, false); 3532 NFSUNLOCKCLSTATE(); 3533 newnfs_copycred(&dp->nfsdl_cred, cred); 3534 nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3535 free(dp, M_NFSCLDELEG); 3536 } else 3537 NFSUNLOCKCLSTATE(); 3538 NFSFREECRED(cred); 3539 } 3540 3541 /* 3542 * Do a callback RPC. 3543 */ 3544 void 3545 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3546 { 3547 int clist, gotseq_ok, i, j, k, op, rcalls; 3548 u_int32_t *tl; 3549 struct nfsclclient *clp; 3550 struct nfscldeleg *dp = NULL; 3551 int numops, taglen = -1, error = 0, trunc __unused; 3552 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3553 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3554 vnode_t vp = NULL; 3555 struct nfsnode *np; 3556 struct vattr va; 3557 struct nfsfh *nfhp; 3558 mount_t mp; 3559 nfsattrbit_t attrbits, rattrbits; 3560 nfsv4stateid_t stateid; 3561 uint32_t seqid, slotid = 0, highslot, cachethis __unused; 3562 uint8_t sessionid[NFSX_V4SESSIONID]; 3563 struct mbuf *rep; 3564 struct nfscllayout *lyp; 3565 uint64_t filesid[2], len, off; 3566 int changed, gotone, laytype, recalltype; 3567 uint32_t iomode; 3568 struct nfsclrecalllayout *recallp = NULL; 3569 struct nfsclsession *tsep; 3570 3571 gotseq_ok = 0; 3572 nfsrvd_rephead(nd); 3573 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3574 taglen = fxdr_unsigned(int, *tl); 3575 if (taglen < 0 || taglen > NFSV4_OPAQUELIMIT) { 3576 error = EBADRPC; 3577 taglen = -1; 3578 goto nfsmout; 3579 } 3580 if (taglen <= NFSV4_SMALLSTR) 3581 tagstr = tag; 3582 else 3583 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3584 error = nfsrv_mtostr(nd, tagstr, taglen); 3585 if (error) { 3586 if (taglen > NFSV4_SMALLSTR) 3587 free(tagstr, M_TEMP); 3588 taglen = -1; 3589 goto nfsmout; 3590 } 3591 (void) nfsm_strtom(nd, tag, taglen); 3592 if (taglen > NFSV4_SMALLSTR) { 3593 free(tagstr, M_TEMP); 3594 } 3595 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3596 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3597 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3598 if (minorvers != NFSV4_MINORVERSION && 3599 minorvers != NFSV41_MINORVERSION && 3600 minorvers != NFSV42_MINORVERSION) 3601 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3602 cbident = fxdr_unsigned(u_int32_t, *tl++); 3603 if (nd->nd_repstat) 3604 numops = 0; 3605 else 3606 numops = fxdr_unsigned(int, *tl); 3607 /* 3608 * Loop around doing the sub ops. 3609 */ 3610 for (i = 0; i < numops; i++) { 3611 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3612 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3613 *repp++ = *tl; 3614 op = fxdr_unsigned(int, *tl); 3615 nd->nd_procnum = op; 3616 if (i == 0 && op != NFSV4OP_CBSEQUENCE && minorvers != 3617 NFSV4_MINORVERSION) { 3618 nd->nd_repstat = NFSERR_OPNOTINSESS; 3619 *repp = nfscl_errmap(nd, minorvers); 3620 retops++; 3621 break; 3622 } 3623 if (op < NFSV4OP_CBGETATTR || 3624 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3625 (op > NFSV4OP_CBNOTIFYDEVID && 3626 minorvers == NFSV41_MINORVERSION) || 3627 (op > NFSV4OP_CBOFFLOAD && 3628 minorvers == NFSV42_MINORVERSION)) { 3629 nd->nd_repstat = NFSERR_OPILLEGAL; 3630 *repp = nfscl_errmap(nd, minorvers); 3631 retops++; 3632 break; 3633 } 3634 if (op < NFSV42_CBNOPS) 3635 nfsstatsv1.cbrpccnt[nd->nd_procnum]++; 3636 switch (op) { 3637 case NFSV4OP_CBGETATTR: 3638 NFSCL_DEBUG(4, "cbgetattr\n"); 3639 mp = NULL; 3640 vp = NULL; 3641 error = nfsm_getfh(nd, &nfhp); 3642 if (!error) 3643 error = nfsrv_getattrbits(nd, &attrbits, 3644 NULL, NULL); 3645 if (!error) { 3646 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3647 &clp); 3648 if (mp == NULL) 3649 error = NFSERR_SERVERFAULT; 3650 } 3651 if (!error) { 3652 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3653 nfhp->nfh_len, p, &np); 3654 if (!error) 3655 vp = NFSTOV(np); 3656 } 3657 if (!error) { 3658 NFSZERO_ATTRBIT(&rattrbits); 3659 NFSLOCKCLSTATE(); 3660 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3661 nfhp->nfh_len); 3662 if (dp != NULL) { 3663 if (NFSISSET_ATTRBIT(&attrbits, 3664 NFSATTRBIT_SIZE)) { 3665 if (vp != NULL) 3666 va.va_size = np->n_size; 3667 else 3668 va.va_size = 3669 dp->nfsdl_size; 3670 NFSSETBIT_ATTRBIT(&rattrbits, 3671 NFSATTRBIT_SIZE); 3672 } 3673 if (NFSISSET_ATTRBIT(&attrbits, 3674 NFSATTRBIT_CHANGE)) { 3675 va.va_filerev = 3676 dp->nfsdl_change; 3677 if (vp == NULL || 3678 (np->n_flag & NDELEGMOD)) 3679 va.va_filerev++; 3680 NFSSETBIT_ATTRBIT(&rattrbits, 3681 NFSATTRBIT_CHANGE); 3682 } 3683 } else 3684 error = NFSERR_SERVERFAULT; 3685 NFSUNLOCKCLSTATE(); 3686 } 3687 if (vp != NULL) 3688 vrele(vp); 3689 if (mp != NULL) 3690 vfs_unbusy(mp); 3691 if (nfhp != NULL) 3692 free(nfhp, M_NFSFH); 3693 if (!error) 3694 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3695 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3696 (uint64_t)0, NULL); 3697 break; 3698 case NFSV4OP_CBRECALL: 3699 NFSCL_DEBUG(4, "cbrecall\n"); 3700 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3701 NFSX_UNSIGNED); 3702 stateid.seqid = *tl++; 3703 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3704 NFSX_STATEIDOTHER); 3705 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3706 trunc = fxdr_unsigned(int, *tl); 3707 error = nfsm_getfh(nd, &nfhp); 3708 if (!error) { 3709 NFSLOCKCLSTATE(); 3710 if (minorvers == NFSV4_MINORVERSION) 3711 clp = nfscl_getclnt(cbident); 3712 else 3713 clp = nfscl_getclntsess(sessionid); 3714 if (clp != NULL) { 3715 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3716 nfhp->nfh_len); 3717 if (dp != NULL && (dp->nfsdl_flags & 3718 NFSCLDL_DELEGRET) == 0) { 3719 dp->nfsdl_flags |= 3720 NFSCLDL_RECALL; 3721 wakeup((caddr_t)clp); 3722 } 3723 } else { 3724 error = NFSERR_SERVERFAULT; 3725 } 3726 NFSUNLOCKCLSTATE(); 3727 } 3728 if (nfhp != NULL) 3729 free(nfhp, M_NFSFH); 3730 break; 3731 case NFSV4OP_CBLAYOUTRECALL: 3732 NFSCL_DEBUG(4, "cblayrec\n"); 3733 nfhp = NULL; 3734 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3735 laytype = fxdr_unsigned(int, *tl++); 3736 iomode = fxdr_unsigned(uint32_t, *tl++); 3737 if (newnfs_true == *tl++) 3738 changed = 1; 3739 else 3740 changed = 0; 3741 recalltype = fxdr_unsigned(int, *tl); 3742 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n", 3743 laytype, iomode, changed, recalltype); 3744 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3745 M_WAITOK); 3746 if (laytype != NFSLAYOUT_NFSV4_1_FILES && 3747 laytype != NFSLAYOUT_FLEXFILE) 3748 error = NFSERR_NOMATCHLAYOUT; 3749 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3750 error = nfsm_getfh(nd, &nfhp); 3751 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3752 if (error != 0) 3753 goto nfsmout; 3754 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3755 NFSX_STATEID); 3756 off = fxdr_hyper(tl); tl += 2; 3757 len = fxdr_hyper(tl); tl += 2; 3758 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3759 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3760 if (minorvers == NFSV4_MINORVERSION) 3761 error = NFSERR_NOTSUPP; 3762 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n", 3763 (uintmax_t)off, (uintmax_t)len, 3764 stateid.seqid, error); 3765 if (error == 0) { 3766 NFSLOCKCLSTATE(); 3767 clp = nfscl_getclntsess(sessionid); 3768 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3769 if (clp != NULL) { 3770 lyp = nfscl_findlayout(clp, 3771 nfhp->nfh_fh, 3772 nfhp->nfh_len); 3773 NFSCL_DEBUG(4, "cblyp=%p\n", 3774 lyp); 3775 if (lyp != NULL && 3776 (lyp->nfsly_flags & 3777 (NFSLY_FILES | 3778 NFSLY_FLEXFILE)) != 0 && 3779 !NFSBCMP(stateid.other, 3780 lyp->nfsly_stateid.other, 3781 NFSX_STATEIDOTHER)) { 3782 error = 3783 nfscl_layoutrecall( 3784 recalltype, 3785 lyp, iomode, off, 3786 len, stateid.seqid, 3787 0, 0, NULL, 3788 recallp); 3789 if (error == 0 && 3790 stateid.seqid > 3791 lyp->nfsly_stateid.seqid) 3792 lyp->nfsly_stateid.seqid = 3793 stateid.seqid; 3794 recallp = NULL; 3795 wakeup(clp); 3796 NFSCL_DEBUG(4, 3797 "aft layrcal=%d " 3798 "layseqid=%d\n", 3799 error, 3800 lyp->nfsly_stateid.seqid); 3801 } else 3802 error = 3803 NFSERR_NOMATCHLAYOUT; 3804 } else 3805 error = NFSERR_NOMATCHLAYOUT; 3806 NFSUNLOCKCLSTATE(); 3807 } 3808 free(nfhp, M_NFSFH); 3809 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3810 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3811 filesid[0] = fxdr_hyper(tl); tl += 2; 3812 filesid[1] = fxdr_hyper(tl); tl += 2; 3813 gotone = 0; 3814 NFSLOCKCLSTATE(); 3815 clp = nfscl_getclntsess(sessionid); 3816 if (clp != NULL) { 3817 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3818 nfsly_list) { 3819 if (lyp->nfsly_filesid[0] == 3820 filesid[0] && 3821 lyp->nfsly_filesid[1] == 3822 filesid[1]) { 3823 error = 3824 nfscl_layoutrecall( 3825 recalltype, 3826 lyp, iomode, 0, 3827 UINT64_MAX, 3828 lyp->nfsly_stateid.seqid, 3829 0, 0, NULL, 3830 recallp); 3831 recallp = NULL; 3832 gotone = 1; 3833 } 3834 } 3835 if (gotone != 0) 3836 wakeup(clp); 3837 else 3838 error = NFSERR_NOMATCHLAYOUT; 3839 } else 3840 error = NFSERR_NOMATCHLAYOUT; 3841 NFSUNLOCKCLSTATE(); 3842 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3843 gotone = 0; 3844 NFSLOCKCLSTATE(); 3845 clp = nfscl_getclntsess(sessionid); 3846 if (clp != NULL) { 3847 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3848 nfsly_list) { 3849 error = nfscl_layoutrecall( 3850 recalltype, lyp, iomode, 0, 3851 UINT64_MAX, 3852 lyp->nfsly_stateid.seqid, 3853 0, 0, NULL, recallp); 3854 recallp = NULL; 3855 gotone = 1; 3856 } 3857 if (gotone != 0) 3858 wakeup(clp); 3859 else 3860 error = NFSERR_NOMATCHLAYOUT; 3861 } else 3862 error = NFSERR_NOMATCHLAYOUT; 3863 NFSUNLOCKCLSTATE(); 3864 } else 3865 error = NFSERR_NOMATCHLAYOUT; 3866 if (recallp != NULL) { 3867 free(recallp, M_NFSLAYRECALL); 3868 recallp = NULL; 3869 } 3870 break; 3871 case NFSV4OP_CBSEQUENCE: 3872 if (i != 0) { 3873 error = NFSERR_SEQUENCEPOS; 3874 break; 3875 } 3876 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3877 5 * NFSX_UNSIGNED); 3878 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3879 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3880 seqid = fxdr_unsigned(uint32_t, *tl++); 3881 slotid = fxdr_unsigned(uint32_t, *tl++); 3882 highslot = fxdr_unsigned(uint32_t, *tl++); 3883 cachethis = *tl++; 3884 /* Throw away the referring call stuff. */ 3885 clist = fxdr_unsigned(int, *tl); 3886 for (j = 0; j < clist; j++) { 3887 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3888 NFSX_UNSIGNED); 3889 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3890 rcalls = fxdr_unsigned(int, *tl); 3891 for (k = 0; k < rcalls; k++) { 3892 NFSM_DISSECT(tl, uint32_t *, 3893 2 * NFSX_UNSIGNED); 3894 } 3895 } 3896 NFSLOCKCLSTATE(); 3897 clp = nfscl_getclntsess(sessionid); 3898 if (clp == NULL) 3899 error = NFSERR_SERVERFAULT; 3900 if (error == 0) { 3901 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3902 error = nfsv4_seqsession(seqid, slotid, 3903 highslot, tsep->nfsess_cbslots, &rep, 3904 tsep->nfsess_backslots); 3905 } 3906 NFSUNLOCKCLSTATE(); 3907 if (error == 0 || error == NFSERR_REPLYFROMCACHE) { 3908 gotseq_ok = 1; 3909 if (rep != NULL) { 3910 /* 3911 * Handle a reply for a retried 3912 * callback. The reply will be 3913 * re-inserted in the session cache 3914 * by the nfsv4_seqsess_cacherep() call 3915 * after out: 3916 */ 3917 KASSERT(error == NFSERR_REPLYFROMCACHE, 3918 ("cbsequence: non-NULL rep")); 3919 NFSCL_DEBUG(4, "Got cbretry\n"); 3920 m_freem(nd->nd_mreq); 3921 nd->nd_mreq = rep; 3922 rep = NULL; 3923 goto out; 3924 } 3925 NFSM_BUILD(tl, uint32_t *, 3926 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3927 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3928 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3929 *tl++ = txdr_unsigned(seqid); 3930 *tl++ = txdr_unsigned(slotid); 3931 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3932 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3933 } 3934 break; 3935 default: 3936 if (i == 0 && minorvers != NFSV4_MINORVERSION) 3937 error = NFSERR_OPNOTINSESS; 3938 else { 3939 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3940 error = NFSERR_NOTSUPP; 3941 } 3942 break; 3943 } 3944 if (error) { 3945 if (error == EBADRPC || error == NFSERR_BADXDR) { 3946 nd->nd_repstat = NFSERR_BADXDR; 3947 } else { 3948 nd->nd_repstat = error; 3949 } 3950 error = 0; 3951 } 3952 retops++; 3953 if (nd->nd_repstat) { 3954 *repp = nfscl_errmap(nd, minorvers); 3955 break; 3956 } else 3957 *repp = 0; /* NFS4_OK */ 3958 } 3959 nfsmout: 3960 if (recallp != NULL) 3961 free(recallp, M_NFSLAYRECALL); 3962 if (error) { 3963 if (error == EBADRPC || error == NFSERR_BADXDR) 3964 nd->nd_repstat = NFSERR_BADXDR; 3965 else 3966 printf("nfsv4 comperr1=%d\n", error); 3967 } 3968 if (taglen == -1) { 3969 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3970 *tl++ = 0; 3971 *tl = 0; 3972 } else { 3973 *retopsp = txdr_unsigned(retops); 3974 } 3975 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3976 out: 3977 if (gotseq_ok != 0) { 3978 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3979 NFSLOCKCLSTATE(); 3980 clp = nfscl_getclntsess(sessionid); 3981 if (clp != NULL) { 3982 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3983 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3984 NFSERR_OK, &rep); 3985 NFSUNLOCKCLSTATE(); 3986 } else { 3987 NFSUNLOCKCLSTATE(); 3988 m_freem(rep); 3989 } 3990 } 3991 } 3992 3993 /* 3994 * Generate the next cbident value. Basically just increment a static value 3995 * and then check that it isn't already in the list, if it has wrapped around. 3996 */ 3997 static u_int32_t 3998 nfscl_nextcbident(void) 3999 { 4000 struct nfsclclient *clp; 4001 int matched; 4002 static u_int32_t nextcbident = 0; 4003 static int haswrapped = 0; 4004 4005 nextcbident++; 4006 if (nextcbident == 0) 4007 haswrapped = 1; 4008 if (haswrapped) { 4009 /* 4010 * Search the clientid list for one already using this cbident. 4011 */ 4012 do { 4013 matched = 0; 4014 NFSLOCKCLSTATE(); 4015 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 4016 if (clp->nfsc_cbident == nextcbident) { 4017 matched = 1; 4018 break; 4019 } 4020 } 4021 NFSUNLOCKCLSTATE(); 4022 if (matched == 1) 4023 nextcbident++; 4024 } while (matched); 4025 } 4026 return (nextcbident); 4027 } 4028 4029 /* 4030 * Get the mount point related to a given cbident or session and busy it. 4031 */ 4032 static mount_t 4033 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 4034 struct nfsclclient **clpp) 4035 { 4036 struct nfsclclient *clp; 4037 mount_t mp; 4038 int error; 4039 struct nfsclsession *tsep; 4040 4041 *clpp = NULL; 4042 NFSLOCKCLSTATE(); 4043 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 4044 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 4045 if (minorvers == NFSV4_MINORVERSION) { 4046 if (clp->nfsc_cbident == cbident) 4047 break; 4048 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 4049 NFSX_V4SESSIONID)) 4050 break; 4051 } 4052 if (clp == NULL) { 4053 NFSUNLOCKCLSTATE(); 4054 return (NULL); 4055 } 4056 mp = clp->nfsc_nmp->nm_mountp; 4057 vfs_ref(mp); 4058 NFSUNLOCKCLSTATE(); 4059 error = vfs_busy(mp, 0); 4060 vfs_rel(mp); 4061 if (error != 0) 4062 return (NULL); 4063 *clpp = clp; 4064 return (mp); 4065 } 4066 4067 /* 4068 * Get the clientid pointer related to a given cbident. 4069 */ 4070 static struct nfsclclient * 4071 nfscl_getclnt(u_int32_t cbident) 4072 { 4073 struct nfsclclient *clp; 4074 4075 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 4076 if (clp->nfsc_cbident == cbident) 4077 break; 4078 return (clp); 4079 } 4080 4081 /* 4082 * Get the clientid pointer related to a given sessionid. 4083 */ 4084 static struct nfsclclient * 4085 nfscl_getclntsess(uint8_t *sessionid) 4086 { 4087 struct nfsclclient *clp; 4088 struct nfsclsession *tsep; 4089 4090 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 4091 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 4092 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 4093 NFSX_V4SESSIONID)) 4094 break; 4095 } 4096 return (clp); 4097 } 4098 4099 /* 4100 * Search for a lock conflict locally on the client. A conflict occurs if 4101 * - not same owner and overlapping byte range and at least one of them is 4102 * a write lock or this is an unlock. 4103 */ 4104 static int 4105 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 4106 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 4107 struct nfscllock **lopp) 4108 { 4109 struct nfsclopen *op; 4110 int ret; 4111 4112 if (dp != NULL) { 4113 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 4114 if (ret) 4115 return (ret); 4116 } 4117 LIST_FOREACH(op, NFSCLOPENHASH(clp, fhp, fhlen), nfso_hash) { 4118 if (op->nfso_fhlen == fhlen && 4119 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 4120 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 4121 own, lopp); 4122 if (ret) 4123 return (ret); 4124 } 4125 } 4126 return (0); 4127 } 4128 4129 static int 4130 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 4131 u_int8_t *own, struct nfscllock **lopp) 4132 { 4133 struct nfscllockowner *lp; 4134 struct nfscllock *lop; 4135 4136 LIST_FOREACH(lp, lhp, nfsl_list) { 4137 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 4138 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 4139 if (lop->nfslo_first >= nlop->nfslo_end) 4140 break; 4141 if (lop->nfslo_end <= nlop->nfslo_first) 4142 continue; 4143 if (lop->nfslo_type == F_WRLCK || 4144 nlop->nfslo_type == F_WRLCK || 4145 nlop->nfslo_type == F_UNLCK) { 4146 if (lopp != NULL) 4147 *lopp = lop; 4148 return (NFSERR_DENIED); 4149 } 4150 } 4151 } 4152 } 4153 return (0); 4154 } 4155 4156 /* 4157 * Check for a local conflicting lock. 4158 */ 4159 int 4160 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 4161 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 4162 { 4163 struct nfscllock *lop, nlck; 4164 struct nfscldeleg *dp; 4165 struct nfsnode *np; 4166 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 4167 int error; 4168 4169 nlck.nfslo_type = fl->l_type; 4170 nlck.nfslo_first = off; 4171 if (len == NFS64BITSSET) { 4172 nlck.nfslo_end = NFS64BITSSET; 4173 } else { 4174 nlck.nfslo_end = off + len; 4175 if (nlck.nfslo_end <= nlck.nfslo_first) 4176 return (NFSERR_INVAL); 4177 } 4178 np = VTONFS(vp); 4179 nfscl_filllockowner(id, own, flags); 4180 NFSLOCKCLSTATE(); 4181 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4182 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 4183 &nlck, own, dp, &lop); 4184 if (error != 0) { 4185 fl->l_whence = SEEK_SET; 4186 fl->l_start = lop->nfslo_first; 4187 if (lop->nfslo_end == NFS64BITSSET) 4188 fl->l_len = 0; 4189 else 4190 fl->l_len = lop->nfslo_end - lop->nfslo_first; 4191 fl->l_pid = (pid_t)0; 4192 fl->l_type = lop->nfslo_type; 4193 error = -1; /* no RPC required */ 4194 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 4195 fl->l_type == F_RDLCK)) { 4196 /* 4197 * The delegation ensures that there isn't a conflicting 4198 * lock on the server, so return -1 to indicate an RPC 4199 * isn't required. 4200 */ 4201 fl->l_type = F_UNLCK; 4202 error = -1; 4203 } 4204 NFSUNLOCKCLSTATE(); 4205 return (error); 4206 } 4207 4208 /* 4209 * Handle Recall of a delegation. 4210 * The clp must be exclusive locked when this is called. 4211 */ 4212 static int 4213 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 4214 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 4215 int called_from_renewthread, vnode_t *vpp) 4216 { 4217 struct nfsclowner *owp, *lowp, *nowp; 4218 struct nfsclopen *op, *lop; 4219 struct nfscllockowner *lp; 4220 struct nfscllock *lckp; 4221 struct nfsnode *np; 4222 int error = 0, ret; 4223 4224 if (vp == NULL) { 4225 KASSERT(vpp != NULL, ("nfscl_recalldeleg: vpp NULL")); 4226 *vpp = NULL; 4227 /* 4228 * First, get a vnode for the file. This is needed to do RPCs. 4229 */ 4230 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 4231 dp->nfsdl_fhlen, p, &np); 4232 if (ret) { 4233 /* 4234 * File isn't open, so nothing to move over to the 4235 * server. 4236 */ 4237 return (0); 4238 } 4239 vp = NFSTOV(np); 4240 *vpp = vp; 4241 } else { 4242 np = VTONFS(vp); 4243 } 4244 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 4245 4246 /* 4247 * Ok, if it's a write delegation, flush data to the server, so 4248 * that close/open consistency is retained. 4249 */ 4250 ret = 0; 4251 NFSLOCKNODE(np); 4252 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 4253 np->n_flag |= NDELEGRECALL; 4254 NFSUNLOCKNODE(np); 4255 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread); 4256 NFSLOCKNODE(np); 4257 np->n_flag &= ~NDELEGRECALL; 4258 } 4259 NFSINVALATTRCACHE(np); 4260 NFSUNLOCKNODE(np); 4261 if (ret == EIO && called_from_renewthread != 0) { 4262 /* 4263 * If the flush failed with EIO for the renew thread, 4264 * return now, so that the dirty buffer will be flushed 4265 * later. 4266 */ 4267 return (ret); 4268 } 4269 4270 /* 4271 * Now, for each openowner with opens issued locally, move them 4272 * over to state against the server. 4273 */ 4274 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 4275 lop = LIST_FIRST(&lowp->nfsow_open); 4276 if (lop != NULL) { 4277 if (LIST_NEXT(lop, nfso_list) != NULL) 4278 panic("nfsdlg mult opens"); 4279 /* 4280 * Look for the same openowner against the server. 4281 */ 4282 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 4283 if (!NFSBCMP(lowp->nfsow_owner, 4284 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 4285 newnfs_copycred(&dp->nfsdl_cred, cred); 4286 ret = nfscl_moveopen(vp, clp, nmp, lop, 4287 owp, dp, cred, p); 4288 if (ret == NFSERR_STALECLIENTID || 4289 ret == NFSERR_STALEDONTRECOVER || 4290 ret == NFSERR_BADSESSION) 4291 return (ret); 4292 if (ret) { 4293 nfscl_freeopen(lop, 1, true); 4294 if (!error) 4295 error = ret; 4296 } 4297 break; 4298 } 4299 } 4300 4301 /* 4302 * If no openowner found, create one and get an open 4303 * for it. 4304 */ 4305 if (owp == NULL) { 4306 nowp = malloc( 4307 sizeof (struct nfsclowner), M_NFSCLOWNER, 4308 M_WAITOK); 4309 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 4310 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 4311 dp->nfsdl_fhlen, NULL, NULL); 4312 newnfs_copycred(&dp->nfsdl_cred, cred); 4313 ret = nfscl_moveopen(vp, clp, nmp, lop, 4314 owp, dp, cred, p); 4315 if (ret) { 4316 nfscl_freeopenowner(owp, 0); 4317 if (ret == NFSERR_STALECLIENTID || 4318 ret == NFSERR_STALEDONTRECOVER || 4319 ret == NFSERR_BADSESSION) 4320 return (ret); 4321 if (ret) { 4322 nfscl_freeopen(lop, 1, true); 4323 if (!error) 4324 error = ret; 4325 } 4326 } 4327 } 4328 } 4329 } 4330 4331 /* 4332 * Now, get byte range locks for any locks done locally. 4333 */ 4334 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4335 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 4336 newnfs_copycred(&dp->nfsdl_cred, cred); 4337 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 4338 if (ret == NFSERR_STALESTATEID || 4339 ret == NFSERR_STALEDONTRECOVER || 4340 ret == NFSERR_STALECLIENTID || 4341 ret == NFSERR_BADSESSION) 4342 return (ret); 4343 if (ret && !error) 4344 error = ret; 4345 } 4346 } 4347 return (error); 4348 } 4349 4350 /* 4351 * Move a locally issued open over to an owner on the state list. 4352 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 4353 * returns with it unlocked. 4354 */ 4355 static int 4356 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4357 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 4358 struct ucred *cred, NFSPROC_T *p) 4359 { 4360 struct nfsclopen *op, *nop; 4361 struct nfscldeleg *ndp; 4362 struct nfsnode *np; 4363 int error = 0, newone; 4364 4365 /* 4366 * First, look for an appropriate open, If found, just increment the 4367 * opencnt in it. 4368 */ 4369 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 4370 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 4371 op->nfso_fhlen == lop->nfso_fhlen && 4372 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 4373 op->nfso_opencnt += lop->nfso_opencnt; 4374 nfscl_freeopen(lop, 1, true); 4375 return (0); 4376 } 4377 } 4378 4379 /* No appropriate open, so we have to do one against the server. */ 4380 np = VTONFS(vp); 4381 nop = malloc(sizeof (struct nfsclopen) + 4382 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 4383 nop->nfso_hash.le_prev = NULL; 4384 newone = 0; 4385 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 4386 lop->nfso_fh, lop->nfso_fhlen, cred, &newone); 4387 ndp = dp; 4388 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 4389 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 4390 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 4391 if (error) { 4392 if (newone) 4393 nfscl_freeopen(op, 0, true); 4394 } else { 4395 op->nfso_mode |= lop->nfso_mode; 4396 op->nfso_opencnt += lop->nfso_opencnt; 4397 nfscl_freeopen(lop, 1, true); 4398 } 4399 if (nop != NULL) 4400 free(nop, M_NFSCLOPEN); 4401 if (ndp != NULL) { 4402 /* 4403 * What should I do with the returned delegation, since the 4404 * delegation is being recalled? For now, just printf and 4405 * through it away. 4406 */ 4407 printf("Moveopen returned deleg\n"); 4408 free(ndp, M_NFSCLDELEG); 4409 } 4410 return (error); 4411 } 4412 4413 /* 4414 * Recall all delegations on this client. 4415 */ 4416 static void 4417 nfscl_totalrecall(struct nfsclclient *clp) 4418 { 4419 struct nfscldeleg *dp; 4420 4421 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4422 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4423 dp->nfsdl_flags |= NFSCLDL_RECALL; 4424 } 4425 } 4426 4427 /* 4428 * Relock byte ranges. Called for delegation recall and state expiry. 4429 */ 4430 static int 4431 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4432 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4433 NFSPROC_T *p) 4434 { 4435 struct nfscllockowner *nlp; 4436 struct nfsfh *nfhp; 4437 struct nfsnode *np; 4438 u_int64_t off, len; 4439 int error, newone, donelocally; 4440 4441 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) { 4442 np = VTONFS(vp); 4443 NFSLOCKNODE(np); 4444 np->n_flag |= NMIGHTBELOCKED; 4445 NFSUNLOCKNODE(np); 4446 } 4447 4448 off = lop->nfslo_first; 4449 len = lop->nfslo_end - lop->nfslo_first; 4450 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4451 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4452 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4453 if (error || donelocally) 4454 return (error); 4455 nfhp = VTONFS(vp)->n_fhp; 4456 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4457 nfhp->nfh_len, nlp, newone, 0, off, 4458 len, lop->nfslo_type, cred, p); 4459 if (error) 4460 nfscl_freelockowner(nlp, 0); 4461 return (error); 4462 } 4463 4464 /* 4465 * Called to re-open a file. Basically get a vnode for the file handle 4466 * and then call nfsrpc_openrpc() to do the rest. 4467 */ 4468 static int 4469 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4470 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4471 struct ucred *cred, NFSPROC_T *p) 4472 { 4473 struct nfsnode *np; 4474 vnode_t vp; 4475 int error; 4476 4477 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4478 if (error) 4479 return (error); 4480 vp = NFSTOV(np); 4481 if (np->n_v4 != NULL) { 4482 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4483 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4484 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4485 cred, p); 4486 } else { 4487 error = EINVAL; 4488 } 4489 vrele(vp); 4490 return (error); 4491 } 4492 4493 /* 4494 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4495 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4496 * fail. 4497 */ 4498 static int 4499 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4500 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4501 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4502 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4503 { 4504 int error; 4505 4506 do { 4507 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4508 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4509 0, 0); 4510 if (error == NFSERR_DELAY) 4511 (void) nfs_catnap(PZERO, error, "nfstryop"); 4512 } while (error == NFSERR_DELAY); 4513 if (error == EAUTH || error == EACCES) { 4514 /* Try again using system credentials */ 4515 newnfs_setroot(cred); 4516 do { 4517 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4518 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4519 delegtype, cred, p, 1, 0); 4520 if (error == NFSERR_DELAY) 4521 (void) nfs_catnap(PZERO, error, "nfstryop"); 4522 } while (error == NFSERR_DELAY); 4523 } 4524 return (error); 4525 } 4526 4527 /* 4528 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4529 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4530 * cred don't work. 4531 */ 4532 static int 4533 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4534 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4535 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4536 { 4537 struct nfsrv_descript nfsd, *nd = &nfsd; 4538 int error; 4539 4540 do { 4541 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4542 reclaim, off, len, type, cred, p, 0); 4543 if (!error && nd->nd_repstat == NFSERR_DELAY) 4544 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4545 "nfstrylck"); 4546 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4547 if (!error) 4548 error = nd->nd_repstat; 4549 if (error == EAUTH || error == EACCES) { 4550 /* Try again using root credentials */ 4551 newnfs_setroot(cred); 4552 do { 4553 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4554 newone, reclaim, off, len, type, cred, p, 1); 4555 if (!error && nd->nd_repstat == NFSERR_DELAY) 4556 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4557 "nfstrylck"); 4558 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4559 if (!error) 4560 error = nd->nd_repstat; 4561 } 4562 return (error); 4563 } 4564 4565 /* 4566 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4567 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4568 * credentials fail. 4569 */ 4570 int 4571 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4572 struct nfsmount *nmp, NFSPROC_T *p) 4573 { 4574 int error; 4575 4576 do { 4577 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4578 if (error == NFSERR_DELAY) 4579 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4580 } while (error == NFSERR_DELAY); 4581 if (error == EAUTH || error == EACCES) { 4582 /* Try again using system credentials */ 4583 newnfs_setroot(cred); 4584 do { 4585 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4586 if (error == NFSERR_DELAY) 4587 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4588 } while (error == NFSERR_DELAY); 4589 } 4590 return (error); 4591 } 4592 4593 /* 4594 * Try a close against the server. Just call nfsrpc_closerpc(), 4595 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4596 * credentials fail. 4597 */ 4598 int 4599 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4600 struct nfsmount *nmp, NFSPROC_T *p, bool loop_on_delayed) 4601 { 4602 struct nfsrv_descript nfsd, *nd = &nfsd; 4603 int error; 4604 4605 do { 4606 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4607 if (loop_on_delayed && error == NFSERR_DELAY) 4608 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4609 } while (loop_on_delayed && error == NFSERR_DELAY); 4610 if (error == EAUTH || error == EACCES) { 4611 /* Try again using system credentials */ 4612 newnfs_setroot(cred); 4613 do { 4614 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4615 if (loop_on_delayed && error == NFSERR_DELAY) 4616 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4617 } while (loop_on_delayed && error == NFSERR_DELAY); 4618 } 4619 return (error); 4620 } 4621 4622 /* 4623 * Decide if a delegation on a file permits close without flushing writes 4624 * to the server. This might be a big performance win in some environments. 4625 * (Not useful until the client does caching on local stable storage.) 4626 */ 4627 int 4628 nfscl_mustflush(vnode_t vp) 4629 { 4630 struct nfsclclient *clp; 4631 struct nfscldeleg *dp; 4632 struct nfsnode *np; 4633 struct nfsmount *nmp; 4634 4635 np = VTONFS(vp); 4636 nmp = VFSTONFS(vp->v_mount); 4637 if (!NFSHASNFSV4(nmp)) 4638 return (1); 4639 NFSLOCKMNT(nmp); 4640 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4641 NFSUNLOCKMNT(nmp); 4642 return (1); 4643 } 4644 NFSUNLOCKMNT(nmp); 4645 NFSLOCKCLSTATE(); 4646 clp = nfscl_findcl(nmp); 4647 if (clp == NULL) { 4648 NFSUNLOCKCLSTATE(); 4649 return (1); 4650 } 4651 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4652 if (dp != NULL && (dp->nfsdl_flags & 4653 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4654 NFSCLDL_WRITE && 4655 (dp->nfsdl_sizelimit >= np->n_size || 4656 !NFSHASSTRICT3530(nmp))) { 4657 NFSUNLOCKCLSTATE(); 4658 return (0); 4659 } 4660 NFSUNLOCKCLSTATE(); 4661 return (1); 4662 } 4663 4664 /* 4665 * See if a (write) delegation exists for this file. 4666 */ 4667 int 4668 nfscl_nodeleg(vnode_t vp, int writedeleg) 4669 { 4670 struct nfsclclient *clp; 4671 struct nfscldeleg *dp; 4672 struct nfsnode *np; 4673 struct nfsmount *nmp; 4674 4675 np = VTONFS(vp); 4676 nmp = VFSTONFS(vp->v_mount); 4677 if (!NFSHASNFSV4(nmp)) 4678 return (1); 4679 NFSLOCKMNT(nmp); 4680 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4681 NFSUNLOCKMNT(nmp); 4682 return (1); 4683 } 4684 NFSUNLOCKMNT(nmp); 4685 NFSLOCKCLSTATE(); 4686 clp = nfscl_findcl(nmp); 4687 if (clp == NULL) { 4688 NFSUNLOCKCLSTATE(); 4689 return (1); 4690 } 4691 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4692 if (dp != NULL && 4693 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4694 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4695 NFSCLDL_WRITE)) { 4696 NFSUNLOCKCLSTATE(); 4697 return (0); 4698 } 4699 NFSUNLOCKCLSTATE(); 4700 return (1); 4701 } 4702 4703 /* 4704 * Look for an associated delegation that should be DelegReturned. 4705 */ 4706 int 4707 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4708 { 4709 struct nfsclclient *clp; 4710 struct nfscldeleg *dp; 4711 struct nfsclowner *owp; 4712 struct nfscllockowner *lp; 4713 struct nfsmount *nmp; 4714 struct mount *mp; 4715 struct ucred *cred; 4716 struct nfsnode *np; 4717 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4718 4719 nmp = VFSTONFS(vp->v_mount); 4720 if (NFSHASPNFS(nmp)) 4721 return (retcnt); 4722 NFSLOCKMNT(nmp); 4723 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4724 NFSUNLOCKMNT(nmp); 4725 return (retcnt); 4726 } 4727 NFSUNLOCKMNT(nmp); 4728 np = VTONFS(vp); 4729 mp = nmp->nm_mountp; 4730 NFSLOCKCLSTATE(); 4731 /* 4732 * Loop around waiting for: 4733 * - outstanding I/O operations on delegations to complete 4734 * - for a delegation on vp that has state, lock the client and 4735 * do a recall 4736 * - return delegation with no state 4737 */ 4738 while (1) { 4739 clp = nfscl_findcl(nmp); 4740 if (clp == NULL) { 4741 NFSUNLOCKCLSTATE(); 4742 return (retcnt); 4743 } 4744 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4745 np->n_fhp->nfh_len); 4746 if (dp != NULL) { 4747 /* 4748 * Wait for outstanding I/O ops to be done. 4749 */ 4750 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4751 if (igotlock) { 4752 nfsv4_unlock(&clp->nfsc_lock, 0); 4753 igotlock = 0; 4754 } 4755 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4756 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO, 4757 "nfscld", hz); 4758 if (NFSCL_FORCEDISM(mp)) { 4759 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET; 4760 NFSUNLOCKCLSTATE(); 4761 return (0); 4762 } 4763 continue; 4764 } 4765 needsrecall = 0; 4766 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4767 if (!LIST_EMPTY(&owp->nfsow_open)) { 4768 needsrecall = 1; 4769 break; 4770 } 4771 } 4772 if (!needsrecall) { 4773 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4774 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4775 needsrecall = 1; 4776 break; 4777 } 4778 } 4779 } 4780 if (needsrecall && !triedrecall) { 4781 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4782 islept = 0; 4783 while (!igotlock) { 4784 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4785 &islept, NFSCLSTATEMUTEXPTR, mp); 4786 if (NFSCL_FORCEDISM(mp)) { 4787 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET; 4788 if (igotlock) 4789 nfsv4_unlock(&clp->nfsc_lock, 0); 4790 NFSUNLOCKCLSTATE(); 4791 return (0); 4792 } 4793 if (islept) 4794 break; 4795 } 4796 if (islept) 4797 continue; 4798 NFSUNLOCKCLSTATE(); 4799 cred = newnfs_getcred(); 4800 newnfs_copycred(&dp->nfsdl_cred, cred); 4801 nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0, NULL); 4802 NFSFREECRED(cred); 4803 triedrecall = 1; 4804 NFSLOCKCLSTATE(); 4805 nfsv4_unlock(&clp->nfsc_lock, 0); 4806 igotlock = 0; 4807 continue; 4808 } 4809 *stp = dp->nfsdl_stateid; 4810 retcnt = 1; 4811 nfscl_cleandeleg(dp); 4812 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 4813 } 4814 if (igotlock) 4815 nfsv4_unlock(&clp->nfsc_lock, 0); 4816 NFSUNLOCKCLSTATE(); 4817 return (retcnt); 4818 } 4819 } 4820 4821 /* 4822 * Look for associated delegation(s) that should be DelegReturned. 4823 */ 4824 int 4825 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4826 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4827 { 4828 struct nfsclclient *clp; 4829 struct nfscldeleg *dp; 4830 struct nfsclowner *owp; 4831 struct nfscllockowner *lp; 4832 struct nfsmount *nmp; 4833 struct mount *mp; 4834 struct ucred *cred; 4835 struct nfsnode *np; 4836 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4837 4838 nmp = VFSTONFS(fvp->v_mount); 4839 *gotfdp = 0; 4840 *gottdp = 0; 4841 if (NFSHASPNFS(nmp)) 4842 return (retcnt); 4843 NFSLOCKMNT(nmp); 4844 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 4845 NFSUNLOCKMNT(nmp); 4846 return (retcnt); 4847 } 4848 NFSUNLOCKMNT(nmp); 4849 mp = nmp->nm_mountp; 4850 NFSLOCKCLSTATE(); 4851 /* 4852 * Loop around waiting for: 4853 * - outstanding I/O operations on delegations to complete 4854 * - for a delegation on fvp that has state, lock the client and 4855 * do a recall 4856 * - return delegation(s) with no state. 4857 */ 4858 while (1) { 4859 clp = nfscl_findcl(nmp); 4860 if (clp == NULL) { 4861 NFSUNLOCKCLSTATE(); 4862 return (retcnt); 4863 } 4864 np = VTONFS(fvp); 4865 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4866 np->n_fhp->nfh_len); 4867 if (dp != NULL && *gotfdp == 0) { 4868 /* 4869 * Wait for outstanding I/O ops to be done. 4870 */ 4871 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4872 if (igotlock) { 4873 nfsv4_unlock(&clp->nfsc_lock, 0); 4874 igotlock = 0; 4875 } 4876 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4877 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO, 4878 "nfscld", hz); 4879 if (NFSCL_FORCEDISM(mp)) { 4880 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET; 4881 NFSUNLOCKCLSTATE(); 4882 *gotfdp = 0; 4883 *gottdp = 0; 4884 return (0); 4885 } 4886 continue; 4887 } 4888 needsrecall = 0; 4889 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4890 if (!LIST_EMPTY(&owp->nfsow_open)) { 4891 needsrecall = 1; 4892 break; 4893 } 4894 } 4895 if (!needsrecall) { 4896 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4897 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4898 needsrecall = 1; 4899 break; 4900 } 4901 } 4902 } 4903 if (needsrecall && !triedrecall) { 4904 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4905 islept = 0; 4906 while (!igotlock) { 4907 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4908 &islept, NFSCLSTATEMUTEXPTR, mp); 4909 if (NFSCL_FORCEDISM(mp)) { 4910 dp->nfsdl_flags &= ~NFSCLDL_DELEGRET; 4911 if (igotlock) 4912 nfsv4_unlock(&clp->nfsc_lock, 0); 4913 NFSUNLOCKCLSTATE(); 4914 *gotfdp = 0; 4915 *gottdp = 0; 4916 return (0); 4917 } 4918 if (islept) 4919 break; 4920 } 4921 if (islept) 4922 continue; 4923 NFSUNLOCKCLSTATE(); 4924 cred = newnfs_getcred(); 4925 newnfs_copycred(&dp->nfsdl_cred, cred); 4926 nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0, NULL); 4927 NFSFREECRED(cred); 4928 triedrecall = 1; 4929 NFSLOCKCLSTATE(); 4930 nfsv4_unlock(&clp->nfsc_lock, 0); 4931 igotlock = 0; 4932 continue; 4933 } 4934 *fstp = dp->nfsdl_stateid; 4935 retcnt++; 4936 *gotfdp = 1; 4937 nfscl_cleandeleg(dp); 4938 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 4939 } 4940 if (igotlock) { 4941 nfsv4_unlock(&clp->nfsc_lock, 0); 4942 igotlock = 0; 4943 } 4944 if (tvp != NULL) { 4945 np = VTONFS(tvp); 4946 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4947 np->n_fhp->nfh_len); 4948 if (dp != NULL && *gottdp == 0) { 4949 /* 4950 * Wait for outstanding I/O ops to be done. 4951 */ 4952 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4953 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4954 msleep(&dp->nfsdl_rwlock, NFSCLSTATEMUTEXPTR, PZERO, 4955 "nfscld", hz); 4956 if (NFSCL_FORCEDISM(mp)) { 4957 NFSUNLOCKCLSTATE(); 4958 *gotfdp = 0; 4959 *gottdp = 0; 4960 return (0); 4961 } 4962 continue; 4963 } 4964 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4965 if (!LIST_EMPTY(&owp->nfsow_open)) { 4966 NFSUNLOCKCLSTATE(); 4967 return (retcnt); 4968 } 4969 } 4970 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4971 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4972 NFSUNLOCKCLSTATE(); 4973 return (retcnt); 4974 } 4975 } 4976 *tstp = dp->nfsdl_stateid; 4977 retcnt++; 4978 *gottdp = 1; 4979 nfscl_cleandeleg(dp); 4980 nfscl_freedeleg(&clp->nfsc_deleg, dp, true); 4981 } 4982 } 4983 NFSUNLOCKCLSTATE(); 4984 return (retcnt); 4985 } 4986 } 4987 4988 /* 4989 * Get a reference on the clientid associated with the mount point. 4990 * Return 1 if success, 0 otherwise. 4991 */ 4992 int 4993 nfscl_getref(struct nfsmount *nmp) 4994 { 4995 struct nfsclclient *clp; 4996 int ret; 4997 4998 NFSLOCKCLSTATE(); 4999 clp = nfscl_findcl(nmp); 5000 if (clp == NULL) { 5001 NFSUNLOCKCLSTATE(); 5002 return (0); 5003 } 5004 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, nmp->nm_mountp); 5005 ret = 1; 5006 if (NFSCL_FORCEDISM(nmp->nm_mountp)) 5007 ret = 0; 5008 NFSUNLOCKCLSTATE(); 5009 return (ret); 5010 } 5011 5012 /* 5013 * Release a reference on a clientid acquired with the above call. 5014 */ 5015 void 5016 nfscl_relref(struct nfsmount *nmp) 5017 { 5018 struct nfsclclient *clp; 5019 5020 NFSLOCKCLSTATE(); 5021 clp = nfscl_findcl(nmp); 5022 if (clp == NULL) { 5023 NFSUNLOCKCLSTATE(); 5024 return; 5025 } 5026 nfsv4_relref(&clp->nfsc_lock); 5027 NFSUNLOCKCLSTATE(); 5028 } 5029 5030 /* 5031 * Save the size attribute in the delegation, since the nfsnode 5032 * is going away. 5033 */ 5034 void 5035 nfscl_reclaimnode(vnode_t vp) 5036 { 5037 struct nfsclclient *clp; 5038 struct nfscldeleg *dp; 5039 struct nfsnode *np = VTONFS(vp); 5040 struct nfsmount *nmp; 5041 5042 nmp = VFSTONFS(vp->v_mount); 5043 if (!NFSHASNFSV4(nmp)) 5044 return; 5045 NFSLOCKCLSTATE(); 5046 clp = nfscl_findcl(nmp); 5047 if (clp == NULL) { 5048 NFSUNLOCKCLSTATE(); 5049 return; 5050 } 5051 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5052 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 5053 dp->nfsdl_size = np->n_size; 5054 NFSUNLOCKCLSTATE(); 5055 } 5056 5057 /* 5058 * Get the saved size attribute in the delegation, since it is a 5059 * newly allocated nfsnode. 5060 */ 5061 void 5062 nfscl_newnode(vnode_t vp) 5063 { 5064 struct nfsclclient *clp; 5065 struct nfscldeleg *dp; 5066 struct nfsnode *np = VTONFS(vp); 5067 struct nfsmount *nmp; 5068 5069 nmp = VFSTONFS(vp->v_mount); 5070 if (!NFSHASNFSV4(nmp)) 5071 return; 5072 NFSLOCKCLSTATE(); 5073 clp = nfscl_findcl(nmp); 5074 if (clp == NULL) { 5075 NFSUNLOCKCLSTATE(); 5076 return; 5077 } 5078 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5079 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 5080 np->n_size = dp->nfsdl_size; 5081 NFSUNLOCKCLSTATE(); 5082 } 5083 5084 /* 5085 * If there is a valid write delegation for this file, set the modtime 5086 * to the local clock time. 5087 */ 5088 void 5089 nfscl_delegmodtime(vnode_t vp) 5090 { 5091 struct nfsclclient *clp; 5092 struct nfscldeleg *dp; 5093 struct nfsnode *np = VTONFS(vp); 5094 struct nfsmount *nmp; 5095 5096 nmp = VFSTONFS(vp->v_mount); 5097 if (!NFSHASNFSV4(nmp)) 5098 return; 5099 NFSLOCKMNT(nmp); 5100 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 5101 NFSUNLOCKMNT(nmp); 5102 return; 5103 } 5104 NFSUNLOCKMNT(nmp); 5105 NFSLOCKCLSTATE(); 5106 clp = nfscl_findcl(nmp); 5107 if (clp == NULL) { 5108 NFSUNLOCKCLSTATE(); 5109 return; 5110 } 5111 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5112 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 5113 nanotime(&dp->nfsdl_modtime); 5114 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 5115 } 5116 NFSUNLOCKCLSTATE(); 5117 } 5118 5119 /* 5120 * If there is a valid write delegation for this file with a modtime set, 5121 * put that modtime in mtime. 5122 */ 5123 void 5124 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 5125 { 5126 struct nfsclclient *clp; 5127 struct nfscldeleg *dp; 5128 struct nfsnode *np = VTONFS(vp); 5129 struct nfsmount *nmp; 5130 5131 nmp = VFSTONFS(vp->v_mount); 5132 if (!NFSHASNFSV4(nmp)) 5133 return; 5134 NFSLOCKMNT(nmp); 5135 if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) { 5136 NFSUNLOCKMNT(nmp); 5137 return; 5138 } 5139 NFSUNLOCKMNT(nmp); 5140 NFSLOCKCLSTATE(); 5141 clp = nfscl_findcl(nmp); 5142 if (clp == NULL) { 5143 NFSUNLOCKCLSTATE(); 5144 return; 5145 } 5146 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5147 if (dp != NULL && 5148 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 5149 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 5150 *mtime = dp->nfsdl_modtime; 5151 NFSUNLOCKCLSTATE(); 5152 } 5153 5154 static int 5155 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 5156 { 5157 short *defaulterrp, *errp; 5158 5159 if (!nd->nd_repstat) 5160 return (0); 5161 if (nd->nd_procnum == NFSPROC_NOOP) 5162 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 5163 if (nd->nd_repstat == EBADRPC) 5164 return (txdr_unsigned(NFSERR_BADXDR)); 5165 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 5166 nd->nd_repstat == NFSERR_OPILLEGAL) 5167 return (txdr_unsigned(nd->nd_repstat)); 5168 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 5169 minorvers > NFSV4_MINORVERSION) { 5170 /* NFSv4.n error. */ 5171 return (txdr_unsigned(nd->nd_repstat)); 5172 } 5173 if (nd->nd_procnum < NFSV4OP_CBNOPS) 5174 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 5175 else 5176 return (txdr_unsigned(nd->nd_repstat)); 5177 while (*++errp) 5178 if (*errp == (short)nd->nd_repstat) 5179 return (txdr_unsigned(nd->nd_repstat)); 5180 return (txdr_unsigned(*defaulterrp)); 5181 } 5182 5183 /* 5184 * Called to find/add a layout to a client. 5185 * This function returns the layout with a refcnt (shared lock) upon 5186 * success (returns 0) or with no lock/refcnt on the layout when an 5187 * error is returned. 5188 * If a layout is passed in via lypp, it is locked (exclusively locked). 5189 */ 5190 int 5191 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 5192 nfsv4stateid_t *stateidp, int layouttype, int retonclose, 5193 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 5194 struct ucred *cred, NFSPROC_T *p) 5195 { 5196 struct nfsclclient *clp; 5197 struct nfscllayout *lyp, *tlyp; 5198 struct nfsclflayout *flp; 5199 struct nfsnode *np = VTONFS(vp); 5200 mount_t mp; 5201 int layout_passed_in; 5202 5203 mp = nmp->nm_mountp; 5204 layout_passed_in = 1; 5205 tlyp = NULL; 5206 lyp = *lypp; 5207 if (lyp == NULL) { 5208 layout_passed_in = 0; 5209 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 5210 M_WAITOK | M_ZERO); 5211 } 5212 5213 NFSLOCKCLSTATE(); 5214 clp = nmp->nm_clp; 5215 if (clp == NULL) { 5216 if (layout_passed_in != 0) 5217 nfsv4_unlock(&lyp->nfsly_lock, 0); 5218 NFSUNLOCKCLSTATE(); 5219 if (tlyp != NULL) 5220 free(tlyp, M_NFSLAYOUT); 5221 return (EPERM); 5222 } 5223 if (lyp == NULL) { 5224 /* 5225 * Although no lyp was passed in, another thread might have 5226 * allocated one. If one is found, just increment it's ref 5227 * count and return it. 5228 */ 5229 lyp = nfscl_findlayout(clp, fhp, fhlen); 5230 if (lyp == NULL) { 5231 lyp = tlyp; 5232 tlyp = NULL; 5233 lyp->nfsly_stateid.seqid = stateidp->seqid; 5234 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 5235 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 5236 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 5237 lyp->nfsly_lastbyte = 0; 5238 LIST_INIT(&lyp->nfsly_flayread); 5239 LIST_INIT(&lyp->nfsly_flayrw); 5240 LIST_INIT(&lyp->nfsly_recall); 5241 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 5242 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 5243 lyp->nfsly_clp = clp; 5244 if (layouttype == NFSLAYOUT_FLEXFILE) 5245 lyp->nfsly_flags = NFSLY_FLEXFILE; 5246 else 5247 lyp->nfsly_flags = NFSLY_FILES; 5248 if (retonclose != 0) 5249 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 5250 lyp->nfsly_fhlen = fhlen; 5251 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 5252 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 5253 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 5254 nfsly_hash); 5255 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 5256 nfscl_layoutcnt++; 5257 nfsstatsv1.cllayouts++; 5258 } else { 5259 if (retonclose != 0) 5260 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 5261 if (stateidp->seqid > lyp->nfsly_stateid.seqid) 5262 lyp->nfsly_stateid.seqid = stateidp->seqid; 5263 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 5264 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 5265 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 5266 } 5267 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5268 if (NFSCL_FORCEDISM(mp)) { 5269 NFSUNLOCKCLSTATE(); 5270 if (tlyp != NULL) 5271 free(tlyp, M_NFSLAYOUT); 5272 return (EPERM); 5273 } 5274 *lypp = lyp; 5275 } else if (stateidp->seqid > lyp->nfsly_stateid.seqid) 5276 lyp->nfsly_stateid.seqid = stateidp->seqid; 5277 5278 /* Merge the new list of File Layouts into the list. */ 5279 flp = LIST_FIRST(fhlp); 5280 if (flp != NULL) { 5281 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 5282 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 5283 else 5284 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 5285 } 5286 if (layout_passed_in != 0) 5287 nfsv4_unlock(&lyp->nfsly_lock, 1); 5288 NFSUNLOCKCLSTATE(); 5289 if (tlyp != NULL) 5290 free(tlyp, M_NFSLAYOUT); 5291 return (0); 5292 } 5293 5294 /* 5295 * Search for a layout by MDS file handle. 5296 * If one is found, it is returned with a refcnt (shared lock) iff 5297 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 5298 * returned NULL. 5299 */ 5300 struct nfscllayout * 5301 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 5302 uint64_t off, uint32_t rwaccess, struct nfsclflayout **retflpp, 5303 int *recalledp) 5304 { 5305 struct nfscllayout *lyp; 5306 mount_t mp; 5307 int error, igotlock; 5308 5309 mp = clp->nfsc_nmp->nm_mountp; 5310 *recalledp = 0; 5311 *retflpp = NULL; 5312 NFSLOCKCLSTATE(); 5313 lyp = nfscl_findlayout(clp, fhp, fhlen); 5314 if (lyp != NULL) { 5315 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 5316 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 5317 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 5318 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 5319 error = nfscl_findlayoutforio(lyp, off, rwaccess, 5320 retflpp); 5321 if (error == 0) 5322 nfsv4_getref(&lyp->nfsly_lock, NULL, 5323 NFSCLSTATEMUTEXPTR, mp); 5324 else { 5325 do { 5326 igotlock = nfsv4_lock(&lyp->nfsly_lock, 5327 1, NULL, NFSCLSTATEMUTEXPTR, mp); 5328 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp)); 5329 *retflpp = NULL; 5330 } 5331 if (NFSCL_FORCEDISM(mp)) { 5332 lyp = NULL; 5333 *recalledp = 1; 5334 } 5335 } else { 5336 lyp = NULL; 5337 *recalledp = 1; 5338 } 5339 } 5340 NFSUNLOCKCLSTATE(); 5341 return (lyp); 5342 } 5343 5344 /* 5345 * Search for a layout by MDS file handle. If one is found, mark in to be 5346 * recalled, if it already marked "return on close". 5347 */ 5348 static void 5349 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp, 5350 int fhlen, struct nfsclrecalllayout **recallpp, struct nfscllayout **lypp) 5351 { 5352 struct nfscllayout *lyp; 5353 uint32_t iomode; 5354 5355 *lypp = NULL; 5356 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vp->v_mount)) || 5357 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 || 5358 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0) 5359 return; 5360 lyp = nfscl_findlayout(clp, fhp, fhlen); 5361 if (lyp != NULL && (lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) { 5362 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 5363 iomode = 0; 5364 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 5365 iomode |= NFSLAYOUTIOMODE_READ; 5366 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 5367 iomode |= NFSLAYOUTIOMODE_RW; 5368 nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 5369 0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL, 5370 *recallpp); 5371 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode); 5372 *recallpp = NULL; 5373 } 5374 5375 /* Now, wake up renew thread to do LayoutReturn. */ 5376 wakeup(clp); 5377 *lypp = lyp; 5378 } 5379 } 5380 5381 /* 5382 * Mark the layout to be recalled and with an error. 5383 * Also, disable the dsp from further use. 5384 */ 5385 void 5386 nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp, 5387 struct nfscllayout *lyp, struct nfsclds *dsp) 5388 { 5389 struct nfsclrecalllayout *recallp; 5390 uint32_t iomode; 5391 5392 printf("DS being disabled, error=%d\n", stat); 5393 /* Set up the return of the layout. */ 5394 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 5395 iomode = 0; 5396 NFSLOCKCLSTATE(); 5397 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 5398 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 5399 iomode |= NFSLAYOUTIOMODE_READ; 5400 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 5401 iomode |= NFSLAYOUTIOMODE_RW; 5402 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 5403 0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op, 5404 dp->nfsdi_deviceid, recallp); 5405 NFSUNLOCKCLSTATE(); 5406 NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode); 5407 } else { 5408 NFSUNLOCKCLSTATE(); 5409 free(recallp, M_NFSLAYRECALL); 5410 } 5411 5412 /* And shut the TCP connection down. */ 5413 nfscl_cancelreqs(dsp); 5414 } 5415 5416 /* 5417 * Cancel all RPCs for this "dsp" by closing the connection. 5418 * Also, mark the session as defunct. 5419 * If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and 5420 * cannot be shut down. 5421 */ 5422 void 5423 nfscl_cancelreqs(struct nfsclds *dsp) 5424 { 5425 struct __rpc_client *cl; 5426 static int non_event; 5427 5428 NFSLOCKDS(dsp); 5429 if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 && 5430 dsp->nfsclds_sockp != NULL && 5431 dsp->nfsclds_sockp->nr_client != NULL) { 5432 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 5433 cl = dsp->nfsclds_sockp->nr_client; 5434 dsp->nfsclds_sess.nfsess_defunct = 1; 5435 NFSUNLOCKDS(dsp); 5436 CLNT_CLOSE(cl); 5437 /* 5438 * This 1sec sleep is done to reduce the number of reconnect 5439 * attempts made on the DS while it has failed. 5440 */ 5441 tsleep(&non_event, PVFS, "ndscls", hz); 5442 return; 5443 } 5444 NFSUNLOCKDS(dsp); 5445 } 5446 5447 /* 5448 * Dereference a layout. 5449 */ 5450 void 5451 nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 5452 { 5453 5454 NFSLOCKCLSTATE(); 5455 if (exclocked != 0) 5456 nfsv4_unlock(&lyp->nfsly_lock, 0); 5457 else 5458 nfsv4_relref(&lyp->nfsly_lock); 5459 NFSUNLOCKCLSTATE(); 5460 } 5461 5462 /* 5463 * Search for a devinfo by deviceid. If one is found, return it after 5464 * acquiring a reference count on it. 5465 */ 5466 struct nfscldevinfo * 5467 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 5468 struct nfscldevinfo *dip) 5469 { 5470 5471 NFSLOCKCLSTATE(); 5472 if (dip == NULL) 5473 dip = nfscl_finddevinfo(clp, deviceid); 5474 if (dip != NULL) 5475 dip->nfsdi_refcnt++; 5476 NFSUNLOCKCLSTATE(); 5477 return (dip); 5478 } 5479 5480 /* 5481 * Dereference a devinfo structure. 5482 */ 5483 static void 5484 nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 5485 { 5486 5487 dip->nfsdi_refcnt--; 5488 if (dip->nfsdi_refcnt == 0) 5489 wakeup(&dip->nfsdi_refcnt); 5490 } 5491 5492 /* 5493 * Dereference a devinfo structure. 5494 */ 5495 void 5496 nfscl_reldevinfo(struct nfscldevinfo *dip) 5497 { 5498 5499 NFSLOCKCLSTATE(); 5500 nfscl_reldevinfo_locked(dip); 5501 NFSUNLOCKCLSTATE(); 5502 } 5503 5504 /* 5505 * Find a layout for this file handle. Return NULL upon failure. 5506 */ 5507 static struct nfscllayout * 5508 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 5509 { 5510 struct nfscllayout *lyp; 5511 5512 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 5513 if (lyp->nfsly_fhlen == fhlen && 5514 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 5515 break; 5516 return (lyp); 5517 } 5518 5519 /* 5520 * Find a devinfo for this deviceid. Return NULL upon failure. 5521 */ 5522 static struct nfscldevinfo * 5523 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 5524 { 5525 struct nfscldevinfo *dip; 5526 5527 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 5528 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 5529 == 0) 5530 break; 5531 return (dip); 5532 } 5533 5534 /* 5535 * Merge the new file layout list into the main one, maintaining it in 5536 * increasing offset order. 5537 */ 5538 static void 5539 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 5540 struct nfsclflayouthead *newfhlp) 5541 { 5542 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 5543 5544 flp = LIST_FIRST(fhlp); 5545 prevflp = NULL; 5546 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 5547 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 5548 prevflp = flp; 5549 flp = LIST_NEXT(flp, nfsfl_list); 5550 } 5551 if (prevflp == NULL) 5552 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 5553 else 5554 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 5555 prevflp = nflp; 5556 } 5557 } 5558 5559 /* 5560 * Add this nfscldevinfo to the client, if it doesn't already exist. 5561 * This function consumes the structure pointed at by dip, if not NULL. 5562 */ 5563 int 5564 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind, 5565 struct nfsclflayout *flp) 5566 { 5567 struct nfsclclient *clp; 5568 struct nfscldevinfo *tdip; 5569 uint8_t *dev; 5570 5571 NFSLOCKCLSTATE(); 5572 clp = nmp->nm_clp; 5573 if (clp == NULL) { 5574 NFSUNLOCKCLSTATE(); 5575 if (dip != NULL) 5576 free(dip, M_NFSDEVINFO); 5577 return (ENODEV); 5578 } 5579 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5580 dev = flp->nfsfl_dev; 5581 else 5582 dev = flp->nfsfl_ffm[ind].dev; 5583 tdip = nfscl_finddevinfo(clp, dev); 5584 if (tdip != NULL) { 5585 tdip->nfsdi_layoutrefs++; 5586 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5587 flp->nfsfl_devp = tdip; 5588 else 5589 flp->nfsfl_ffm[ind].devp = tdip; 5590 nfscl_reldevinfo_locked(tdip); 5591 NFSUNLOCKCLSTATE(); 5592 if (dip != NULL) 5593 free(dip, M_NFSDEVINFO); 5594 return (0); 5595 } 5596 if (dip != NULL) { 5597 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5598 dip->nfsdi_layoutrefs = 1; 5599 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5600 flp->nfsfl_devp = dip; 5601 else 5602 flp->nfsfl_ffm[ind].devp = dip; 5603 } 5604 NFSUNLOCKCLSTATE(); 5605 if (dip == NULL) 5606 return (ENODEV); 5607 return (0); 5608 } 5609 5610 /* 5611 * Free up a layout structure and associated file layout structure(s). 5612 */ 5613 void 5614 nfscl_freelayout(struct nfscllayout *layp) 5615 { 5616 struct nfsclflayout *flp, *nflp; 5617 struct nfsclrecalllayout *rp, *nrp; 5618 5619 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5620 LIST_REMOVE(flp, nfsfl_list); 5621 nfscl_freeflayout(flp); 5622 } 5623 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5624 LIST_REMOVE(flp, nfsfl_list); 5625 nfscl_freeflayout(flp); 5626 } 5627 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5628 LIST_REMOVE(rp, nfsrecly_list); 5629 free(rp, M_NFSLAYRECALL); 5630 } 5631 nfscl_layoutcnt--; 5632 nfsstatsv1.cllayouts--; 5633 free(layp, M_NFSLAYOUT); 5634 } 5635 5636 /* 5637 * Free up a file layout structure. 5638 */ 5639 void 5640 nfscl_freeflayout(struct nfsclflayout *flp) 5641 { 5642 int i, j; 5643 5644 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) { 5645 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5646 free(flp->nfsfl_fh[i], M_NFSFH); 5647 if (flp->nfsfl_devp != NULL) 5648 flp->nfsfl_devp->nfsdi_layoutrefs--; 5649 } 5650 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0) 5651 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) { 5652 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++) 5653 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH); 5654 if (flp->nfsfl_ffm[i].devp != NULL) 5655 flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--; 5656 } 5657 free(flp, M_NFSFLAYOUT); 5658 } 5659 5660 /* 5661 * Free up a file layout devinfo structure. 5662 */ 5663 void 5664 nfscl_freedevinfo(struct nfscldevinfo *dip) 5665 { 5666 5667 free(dip, M_NFSDEVINFO); 5668 } 5669 5670 /* 5671 * Mark any layouts that match as recalled. 5672 */ 5673 static int 5674 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5675 uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op, 5676 char *devid, struct nfsclrecalllayout *recallp) 5677 { 5678 struct nfsclrecalllayout *rp, *orp; 5679 5680 recallp->nfsrecly_recalltype = recalltype; 5681 recallp->nfsrecly_iomode = iomode; 5682 recallp->nfsrecly_stateseqid = stateseqid; 5683 recallp->nfsrecly_off = off; 5684 recallp->nfsrecly_len = len; 5685 recallp->nfsrecly_stat = stat; 5686 recallp->nfsrecly_op = op; 5687 if (devid != NULL) 5688 NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID); 5689 /* 5690 * Order the list as file returns first, followed by fsid and any 5691 * returns, both in increasing stateseqid order. 5692 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5693 * (I'm not sure this is correct because I find RFC5661 confusing 5694 * on this, but hopefully it will work ok.) 5695 */ 5696 orp = NULL; 5697 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5698 orp = rp; 5699 if ((recalltype == NFSLAYOUTRETURN_FILE && 5700 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5701 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5702 (recalltype != NFSLAYOUTRETURN_FILE && 5703 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5704 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5705 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5706 break; 5707 } 5708 5709 /* 5710 * Put any error return on all the file returns that will 5711 * preceed this one. 5712 */ 5713 if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE && 5714 stat != 0 && rp->nfsrecly_stat == 0) { 5715 rp->nfsrecly_stat = stat; 5716 rp->nfsrecly_op = op; 5717 if (devid != NULL) 5718 NFSBCOPY(devid, rp->nfsrecly_devid, 5719 NFSX_V4DEVICEID); 5720 } 5721 } 5722 if (rp == NULL) { 5723 if (orp == NULL) 5724 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5725 nfsrecly_list); 5726 else 5727 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5728 } 5729 lyp->nfsly_flags |= NFSLY_RECALL; 5730 wakeup(lyp->nfsly_clp); 5731 return (0); 5732 } 5733 5734 /* 5735 * Compare the two seqids for ordering. The trick is that the seqids can 5736 * wrap around from 0xffffffff->0, so check for the cases where one 5737 * has wrapped around. 5738 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5739 */ 5740 static int 5741 nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5742 { 5743 5744 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5745 /* seqid2 has wrapped around. */ 5746 return (0); 5747 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5748 /* seqid1 has wrapped around. */ 5749 return (1); 5750 if (seqid1 <= seqid2) 5751 return (1); 5752 return (0); 5753 } 5754 5755 /* 5756 * Do a layout return for each of the recalls. 5757 */ 5758 static void 5759 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5760 struct ucred *cred, NFSPROC_T *p) 5761 { 5762 struct nfsclrecalllayout *rp; 5763 nfsv4stateid_t stateid; 5764 int layouttype; 5765 5766 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5767 stateid.seqid = lyp->nfsly_stateid.seqid; 5768 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5769 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5770 else 5771 layouttype = NFSLAYOUT_FLEXFILE; 5772 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5773 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5774 lyp->nfsly_fhlen, 0, layouttype, 5775 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5776 rp->nfsrecly_off, rp->nfsrecly_len, 5777 &stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op, 5778 rp->nfsrecly_devid); 5779 } 5780 } 5781 5782 /* 5783 * Do the layout commit for a file layout. 5784 */ 5785 static void 5786 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5787 struct ucred *cred, NFSPROC_T *p) 5788 { 5789 struct nfsclflayout *flp; 5790 uint64_t len; 5791 int error, layouttype; 5792 5793 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5794 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5795 else 5796 layouttype = NFSLAYOUT_FLEXFILE; 5797 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5798 if (layouttype == NFSLAYOUT_FLEXFILE && 5799 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) { 5800 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n"); 5801 /* If not supported, don't bother doing it. */ 5802 NFSLOCKMNT(nmp); 5803 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5804 NFSUNLOCKMNT(nmp); 5805 break; 5806 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5807 len = flp->nfsfl_end - flp->nfsfl_off; 5808 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5809 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5810 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5811 layouttype, cred, p); 5812 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5813 if (error == NFSERR_NOTSUPP) { 5814 /* If not supported, don't bother doing it. */ 5815 NFSLOCKMNT(nmp); 5816 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5817 NFSUNLOCKMNT(nmp); 5818 break; 5819 } 5820 } 5821 } 5822 } 5823 5824 /* 5825 * Commit all layouts for a file (vnode). 5826 */ 5827 int 5828 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5829 { 5830 struct nfsclclient *clp; 5831 struct nfscllayout *lyp; 5832 struct nfsnode *np = VTONFS(vp); 5833 mount_t mp; 5834 struct nfsmount *nmp; 5835 5836 mp = vp->v_mount; 5837 nmp = VFSTONFS(mp); 5838 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5839 return (0); 5840 NFSLOCKCLSTATE(); 5841 clp = nmp->nm_clp; 5842 if (clp == NULL) { 5843 NFSUNLOCKCLSTATE(); 5844 return (EPERM); 5845 } 5846 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5847 if (lyp == NULL) { 5848 NFSUNLOCKCLSTATE(); 5849 return (EPERM); 5850 } 5851 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5852 if (NFSCL_FORCEDISM(mp)) { 5853 NFSUNLOCKCLSTATE(); 5854 return (EPERM); 5855 } 5856 tryagain: 5857 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5858 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5859 NFSUNLOCKCLSTATE(); 5860 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5861 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5862 NFSLOCKCLSTATE(); 5863 goto tryagain; 5864 } 5865 nfsv4_relref(&lyp->nfsly_lock); 5866 NFSUNLOCKCLSTATE(); 5867 return (0); 5868 } 5869