nfs_clstate.c revision 317475
1/*- 2 * Copyright (c) 2009 Rick Macklem, University of Guelph 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/10/sys/fs/nfsclient/nfs_clstate.c 317475 2017-04-26 23:01:49Z rmacklem $"); 30 31/* 32 * These functions implement the client side state handling for NFSv4. 33 * NFSv4 state handling: 34 * - A lockowner is used to determine lock contention, so it 35 * corresponds directly to a Posix pid. (1 to 1 mapping) 36 * - The correct granularity of an OpenOwner is not nearly so 37 * obvious. An OpenOwner does the following: 38 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner 39 * - is used to check for Open/Share contention (not applicable to 40 * this client, since all Opens are Deny_None) 41 * As such, I considered both extreme. 42 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes 43 * all Open, Close and Lock (with a new lockowner) Ops. 44 * 1 OpenOwner for each Open - This one results in an OpenConfirm for 45 * every Open, for most servers. 46 * So, I chose to use the same mapping as I did for LockOwnwers. 47 * The main concern here is that you can end up with multiple Opens 48 * for the same File Handle, but on different OpenOwners (opens 49 * inherited from parents, grandparents...) and you do not know 50 * which of these the vnodeop close applies to. This is handled by 51 * delaying the Close Op(s) until all of the Opens have been closed. 52 * (It is not yet obvious if this is the correct granularity.) 53 * - How the code handles serialization: 54 * - For the ClientId, it uses an exclusive lock while getting its 55 * SetClientId and during recovery. Otherwise, it uses a shared 56 * lock via a reference count. 57 * - For the rest of the data structures, it uses an SMP mutex 58 * (once the nfs client is SMP safe) and doesn't sleep while 59 * manipulating the linked lists. 60 * - The serialization of Open/Close/Lock/LockU falls out in the 61 * "wash", since OpenOwners and LockOwners are both mapped from 62 * Posix pid. In other words, there is only one Posix pid using 63 * any given owner, so that owner is serialized. (If you change 64 * the granularity of the OpenOwner, then code must be added to 65 * serialize Ops on the OpenOwner.) 66 * - When to get rid of OpenOwners and LockOwners. 67 * - The function nfscl_cleanup_common() is executed after a process exits. 68 * It goes through the client list looking for all Open and Lock Owners. 69 * When one is found, it is marked "defunct" or in the case of 70 * an OpenOwner without any Opens, freed. 71 * The renew thread scans for defunct Owners and gets rid of them, 72 * if it can. The LockOwners will also be deleted when the 73 * associated Open is closed. 74 * - If the LockU or Close Op(s) fail during close in a way 75 * that could be recovered upon retry, they are relinked to the 76 * ClientId's defunct open list and retried by the renew thread 77 * until they succeed or an unmount/recovery occurs. 78 * (Since we are done with them, they do not need to be recovered.) 79 */ 80 81#ifndef APPLEKEXT 82#include <fs/nfs/nfsport.h> 83 84/* 85 * Global variables 86 */ 87extern struct nfsstats newnfsstats; 88extern struct nfsreqhead nfsd_reqq; 89extern u_int32_t newnfs_false, newnfs_true; 90extern int nfscl_debuglevel; 91NFSREQSPINLOCK; 92NFSCLSTATEMUTEX; 93int nfscl_inited = 0; 94struct nfsclhead nfsclhead; /* Head of clientid list */ 95int nfscl_deleghighwater = NFSCLDELEGHIGHWATER; 96int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER; 97#endif /* !APPLEKEXT */ 98 99static int nfscl_delegcnt = 0; 100static int nfscl_layoutcnt = 0; 101static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *, 102 u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **); 103static void nfscl_clrelease(struct nfsclclient *); 104static void nfscl_cleanclient(struct nfsclclient *); 105static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 106 struct ucred *, NFSPROC_T *); 107static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 108 struct nfsmount *, struct ucred *, NFSPROC_T *); 109static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *); 110static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 111 struct nfscllock *, int); 112static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 113 struct nfscllock **, int); 114static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *); 115static u_int32_t nfscl_nextcbident(void); 116static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **); 117static struct nfsclclient *nfscl_getclnt(u_int32_t); 118static struct nfsclclient *nfscl_getclntsess(uint8_t *); 119static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 120 int); 121static void nfscl_retoncloselayout(struct nfsclclient *, uint8_t *, int); 122static void nfscl_reldevinfo_locked(struct nfscldevinfo *); 123static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *, 124 int); 125static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *); 126static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 127 u_int8_t *, struct nfscllock **); 128static void nfscl_freealllocks(struct nfscllockownerhead *, int); 129static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 130 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 131static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 132 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 133 struct nfsclopen **, u_int8_t *, u_int8_t *, int, int *); 134static int nfscl_moveopen(vnode_t , struct nfsclclient *, 135 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 136 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 137static void nfscl_totalrecall(struct nfsclclient *); 138static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 139 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 140static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 141 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 142 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 143static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 144 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 145 struct ucred *, NFSPROC_T *); 146static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 147 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 148static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *); 149static int nfscl_errmap(struct nfsrv_descript *, u_int32_t); 150static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 151static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 152 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int); 153static void nfscl_freeopenowner(struct nfsclowner *, int); 154static void nfscl_cleandeleg(struct nfscldeleg *); 155static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 156 struct nfsmount *, NFSPROC_T *); 157static void nfscl_emptylockowner(struct nfscllockowner *, 158 struct nfscllockownerfhhead *); 159static void nfscl_mergeflayouts(struct nfsclflayouthead *, 160 struct nfsclflayouthead *); 161static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t, 162 uint64_t, uint32_t, struct nfsclrecalllayout *); 163static int nfscl_seq(uint32_t, uint32_t); 164static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *, 165 struct ucred *, NFSPROC_T *); 166static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *, 167 struct ucred *, NFSPROC_T *); 168 169static short nfscberr_null[] = { 170 0, 171 0, 172}; 173 174static short nfscberr_getattr[] = { 175 NFSERR_RESOURCE, 176 NFSERR_BADHANDLE, 177 NFSERR_BADXDR, 178 NFSERR_RESOURCE, 179 NFSERR_SERVERFAULT, 180 0, 181}; 182 183static short nfscberr_recall[] = { 184 NFSERR_RESOURCE, 185 NFSERR_BADHANDLE, 186 NFSERR_BADSTATEID, 187 NFSERR_BADXDR, 188 NFSERR_RESOURCE, 189 NFSERR_SERVERFAULT, 190 0, 191}; 192 193static short *nfscl_cberrmap[] = { 194 nfscberr_null, 195 nfscberr_null, 196 nfscberr_null, 197 nfscberr_getattr, 198 nfscberr_recall 199}; 200 201#define NETFAMILY(clp) \ 202 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 203 204/* 205 * Called for an open operation. 206 * If the nfhp argument is NULL, just get an openowner. 207 */ 208APPLESTATIC int 209nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 210 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 211 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 212{ 213 struct nfsclclient *clp; 214 struct nfsclowner *owp, *nowp; 215 struct nfsclopen *op = NULL, *nop = NULL; 216 struct nfscldeleg *dp; 217 struct nfsclownerhead *ohp; 218 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 219 int ret; 220 221 if (newonep != NULL) 222 *newonep = 0; 223 if (opp != NULL) 224 *opp = NULL; 225 if (owpp != NULL) 226 *owpp = NULL; 227 228 /* 229 * Might need one or both of these, so MALLOC them now, to 230 * avoid a tsleep() in MALLOC later. 231 */ 232 MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner), 233 M_NFSCLOWNER, M_WAITOK); 234 if (nfhp != NULL) 235 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 236 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 237 ret = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 238 if (ret != 0) { 239 FREE((caddr_t)nowp, M_NFSCLOWNER); 240 if (nop != NULL) 241 FREE((caddr_t)nop, M_NFSCLOPEN); 242 return (ret); 243 } 244 245 /* 246 * Get the Open iff it already exists. 247 * If none found, add the new one or return error, depending upon 248 * "create". 249 */ 250 nfscl_filllockowner(p->td_proc, own, F_POSIX); 251 NFSLOCKCLSTATE(); 252 dp = NULL; 253 /* First check the delegation list */ 254 if (nfhp != NULL && usedeleg) { 255 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 256 if (dp->nfsdl_fhlen == fhlen && 257 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 258 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 259 (dp->nfsdl_flags & NFSCLDL_WRITE)) 260 break; 261 dp = NULL; 262 break; 263 } 264 } 265 } 266 267 if (dp != NULL) 268 ohp = &dp->nfsdl_owner; 269 else 270 ohp = &clp->nfsc_owner; 271 /* Now, search for an openowner */ 272 LIST_FOREACH(owp, ohp, nfsow_list) { 273 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 274 break; 275 } 276 277 /* 278 * Create a new open, as required. 279 */ 280 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 281 newonep); 282 283 /* 284 * Now, check the mode on the open and return the appropriate 285 * value. 286 */ 287 if (retp != NULL) { 288 if (nfhp != NULL && dp != NULL && nop == NULL) 289 /* new local open on delegation */ 290 *retp = NFSCLOPEN_SETCRED; 291 else 292 *retp = NFSCLOPEN_OK; 293 } 294 if (op != NULL && (amode & ~(op->nfso_mode))) { 295 op->nfso_mode |= amode; 296 if (retp != NULL && dp == NULL) 297 *retp = NFSCLOPEN_DOOPEN; 298 } 299 300 /* 301 * Serialize modifications to the open owner for multiple threads 302 * within the same process using a read/write sleep lock. 303 */ 304 if (lockit) 305 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 306 NFSUNLOCKCLSTATE(); 307 if (nowp != NULL) 308 FREE((caddr_t)nowp, M_NFSCLOWNER); 309 if (nop != NULL) 310 FREE((caddr_t)nop, M_NFSCLOPEN); 311 if (owpp != NULL) 312 *owpp = owp; 313 if (opp != NULL) 314 *opp = op; 315 return (0); 316} 317 318/* 319 * Create a new open, as required. 320 */ 321static void 322nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 323 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 324 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 325 int *newonep) 326{ 327 struct nfsclowner *owp = *owpp, *nowp; 328 struct nfsclopen *op, *nop; 329 330 if (nowpp != NULL) 331 nowp = *nowpp; 332 else 333 nowp = NULL; 334 if (nopp != NULL) 335 nop = *nopp; 336 else 337 nop = NULL; 338 if (owp == NULL && nowp != NULL) { 339 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 340 LIST_INIT(&nowp->nfsow_open); 341 nowp->nfsow_clp = clp; 342 nowp->nfsow_seqid = 0; 343 nowp->nfsow_defunct = 0; 344 nfscl_lockinit(&nowp->nfsow_rwlock); 345 if (dp != NULL) { 346 newnfsstats.cllocalopenowners++; 347 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 348 } else { 349 newnfsstats.clopenowners++; 350 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 351 } 352 owp = *owpp = nowp; 353 *nowpp = NULL; 354 if (newonep != NULL) 355 *newonep = 1; 356 } 357 358 /* If an fhp has been specified, create an Open as well. */ 359 if (fhp != NULL) { 360 /* and look for the correct open, based upon FH */ 361 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 362 if (op->nfso_fhlen == fhlen && 363 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 364 break; 365 } 366 if (op == NULL && nop != NULL) { 367 nop->nfso_own = owp; 368 nop->nfso_mode = 0; 369 nop->nfso_opencnt = 0; 370 nop->nfso_posixlock = 1; 371 nop->nfso_fhlen = fhlen; 372 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 373 LIST_INIT(&nop->nfso_lock); 374 nop->nfso_stateid.seqid = 0; 375 nop->nfso_stateid.other[0] = 0; 376 nop->nfso_stateid.other[1] = 0; 377 nop->nfso_stateid.other[2] = 0; 378 if (dp != NULL) { 379 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 380 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 381 nfsdl_list); 382 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 383 newnfsstats.cllocalopens++; 384 } else { 385 newnfsstats.clopens++; 386 } 387 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 388 *opp = nop; 389 *nopp = NULL; 390 if (newonep != NULL) 391 *newonep = 1; 392 } else { 393 *opp = op; 394 } 395 } 396} 397 398/* 399 * Called to find/add a delegation to a client. 400 */ 401APPLESTATIC int 402nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 403 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 404{ 405 struct nfscldeleg *dp = *dpp, *tdp; 406 407 /* 408 * First, if we have received a Read delegation for a file on a 409 * read/write file system, just return it, because they aren't 410 * useful, imho. 411 */ 412 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) && 413 (dp->nfsdl_flags & NFSCLDL_READ)) { 414 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p); 415 FREE((caddr_t)dp, M_NFSCLDELEG); 416 *dpp = NULL; 417 return (0); 418 } 419 420 /* Look for the correct deleg, based upon FH */ 421 NFSLOCKCLSTATE(); 422 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 423 if (tdp == NULL) { 424 if (dp == NULL) { 425 NFSUNLOCKCLSTATE(); 426 return (NFSERR_BADSTATEID); 427 } 428 *dpp = NULL; 429 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 430 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 431 nfsdl_hash); 432 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 433 newnfsstats.cldelegates++; 434 nfscl_delegcnt++; 435 } else { 436 /* 437 * Delegation already exists, what do we do if a new one?? 438 */ 439 if (dp != NULL) { 440 printf("Deleg already exists!\n"); 441 FREE((caddr_t)dp, M_NFSCLDELEG); 442 *dpp = NULL; 443 } else { 444 *dpp = tdp; 445 } 446 } 447 NFSUNLOCKCLSTATE(); 448 return (0); 449} 450 451/* 452 * Find a delegation for this file handle. Return NULL upon failure. 453 */ 454static struct nfscldeleg * 455nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 456{ 457 struct nfscldeleg *dp; 458 459 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 460 if (dp->nfsdl_fhlen == fhlen && 461 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 462 break; 463 } 464 return (dp); 465} 466 467/* 468 * Get a stateid for an I/O operation. First, look for an open and iff 469 * found, return either a lockowner stateid or the open stateid. 470 * If no Open is found, just return error and the special stateid of all zeros. 471 */ 472APPLESTATIC int 473nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 474 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 475 void **lckpp) 476{ 477 struct nfsclclient *clp; 478 struct nfsclowner *owp; 479 struct nfsclopen *op = NULL; 480 struct nfscllockowner *lp; 481 struct nfscldeleg *dp; 482 struct nfsnode *np; 483 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 484 int error, done; 485 486 *lckpp = NULL; 487 /* 488 * Initially, just set the special stateid of all zeros. 489 * (Don't do this for a DS, since the special stateid can't be used.) 490 */ 491 if (fords == 0) { 492 stateidp->seqid = 0; 493 stateidp->other[0] = 0; 494 stateidp->other[1] = 0; 495 stateidp->other[2] = 0; 496 } 497 if (vnode_vtype(vp) != VREG) 498 return (EISDIR); 499 np = VTONFS(vp); 500 NFSLOCKCLSTATE(); 501 clp = nfscl_findcl(VFSTONFS(vnode_mount(vp))); 502 if (clp == NULL) { 503 NFSUNLOCKCLSTATE(); 504 return (EACCES); 505 } 506 507 /* 508 * Wait for recovery to complete. 509 */ 510 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 511 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 512 PZERO, "nfsrecvr", NULL); 513 514 /* 515 * First, look for a delegation. 516 */ 517 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 518 if (dp->nfsdl_fhlen == fhlen && 519 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 520 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 521 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 522 stateidp->seqid = dp->nfsdl_stateid.seqid; 523 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 524 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 525 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 526 if (!(np->n_flag & NDELEGRECALL)) { 527 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 528 nfsdl_list); 529 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 530 nfsdl_list); 531 dp->nfsdl_timestamp = NFSD_MONOSEC + 532 120; 533 dp->nfsdl_rwlock.nfslock_usecnt++; 534 *lckpp = (void *)&dp->nfsdl_rwlock; 535 } 536 NFSUNLOCKCLSTATE(); 537 return (0); 538 } 539 break; 540 } 541 } 542 543 if (p != NULL) { 544 /* 545 * If p != NULL, we want to search the parentage tree 546 * for a matching OpenOwner and use that. 547 */ 548 nfscl_filllockowner(p->td_proc, own, F_POSIX); 549 lp = NULL; 550 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own, 551 mode, &lp, &op); 552 if (error == 0 && lp != NULL && fords == 0) { 553 /* Don't return a lock stateid for a DS. */ 554 stateidp->seqid = 555 lp->nfsl_stateid.seqid; 556 stateidp->other[0] = 557 lp->nfsl_stateid.other[0]; 558 stateidp->other[1] = 559 lp->nfsl_stateid.other[1]; 560 stateidp->other[2] = 561 lp->nfsl_stateid.other[2]; 562 NFSUNLOCKCLSTATE(); 563 return (0); 564 } 565 } 566 if (op == NULL) { 567 /* If not found, just look for any OpenOwner that will work. */ 568 done = 0; 569 owp = LIST_FIRST(&clp->nfsc_owner); 570 while (!done && owp != NULL) { 571 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 572 if (op->nfso_fhlen == fhlen && 573 !NFSBCMP(op->nfso_fh, nfhp, fhlen) && 574 (mode & op->nfso_mode) == mode) { 575 done = 1; 576 break; 577 } 578 } 579 if (!done) 580 owp = LIST_NEXT(owp, nfsow_list); 581 } 582 if (!done) { 583 NFSUNLOCKCLSTATE(); 584 return (ENOENT); 585 } 586 /* 587 * For read aheads or write behinds, use the open cred. 588 * A read ahead or write behind is indicated by p == NULL. 589 */ 590 if (p == NULL) 591 newnfs_copycred(&op->nfso_cred, cred); 592 } 593 594 /* 595 * No lock stateid, so return the open stateid. 596 */ 597 stateidp->seqid = op->nfso_stateid.seqid; 598 stateidp->other[0] = op->nfso_stateid.other[0]; 599 stateidp->other[1] = op->nfso_stateid.other[1]; 600 stateidp->other[2] = op->nfso_stateid.other[2]; 601 NFSUNLOCKCLSTATE(); 602 return (0); 603} 604 605/* 606 * Search for a matching file, mode and, optionally, lockowner. 607 */ 608static int 609nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 610 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode, 611 struct nfscllockowner **lpp, struct nfsclopen **opp) 612{ 613 struct nfsclowner *owp; 614 struct nfsclopen *op, *rop, *rop2; 615 struct nfscllockowner *lp; 616 int keep_looping; 617 618 if (lpp != NULL) 619 *lpp = NULL; 620 /* 621 * rop will be set to the open to be returned. There are three 622 * variants of this, all for an open of the correct file: 623 * 1 - A match of lockown. 624 * 2 - A match of the openown, when no lockown match exists. 625 * 3 - A match for any open, if no openown or lockown match exists. 626 * Looking for #2 over #3 probably isn't necessary, but since 627 * RFC3530 is vague w.r.t. the relationship between openowners and 628 * lockowners, I think this is the safer way to go. 629 */ 630 rop = NULL; 631 rop2 = NULL; 632 keep_looping = 1; 633 /* Search the client list */ 634 owp = LIST_FIRST(ohp); 635 while (owp != NULL && keep_looping != 0) { 636 /* and look for the correct open */ 637 op = LIST_FIRST(&owp->nfsow_open); 638 while (op != NULL && keep_looping != 0) { 639 if (op->nfso_fhlen == fhlen && 640 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 641 && (op->nfso_mode & mode) == mode) { 642 if (lpp != NULL) { 643 /* Now look for a matching lockowner. */ 644 LIST_FOREACH(lp, &op->nfso_lock, 645 nfsl_list) { 646 if (!NFSBCMP(lp->nfsl_owner, 647 lockown, 648 NFSV4CL_LOCKNAMELEN)) { 649 *lpp = lp; 650 rop = op; 651 keep_looping = 0; 652 break; 653 } 654 } 655 } 656 if (rop == NULL && !NFSBCMP(owp->nfsow_owner, 657 openown, NFSV4CL_LOCKNAMELEN)) { 658 rop = op; 659 if (lpp == NULL) 660 keep_looping = 0; 661 } 662 if (rop2 == NULL) 663 rop2 = op; 664 } 665 op = LIST_NEXT(op, nfso_list); 666 } 667 owp = LIST_NEXT(owp, nfsow_list); 668 } 669 if (rop == NULL) 670 rop = rop2; 671 if (rop == NULL) 672 return (EBADF); 673 *opp = rop; 674 return (0); 675} 676 677/* 678 * Release use of an open owner. Called when open operations are done 679 * with the open owner. 680 */ 681APPLESTATIC void 682nfscl_ownerrelease(struct nfsclowner *owp, __unused int error, 683 __unused int candelete, int unlocked) 684{ 685 686 if (owp == NULL) 687 return; 688 NFSLOCKCLSTATE(); 689 if (!unlocked) 690 nfscl_lockunlock(&owp->nfsow_rwlock); 691 nfscl_clrelease(owp->nfsow_clp); 692 NFSUNLOCKCLSTATE(); 693} 694 695/* 696 * Release use of an open structure under an open owner. 697 */ 698APPLESTATIC void 699nfscl_openrelease(struct nfsclopen *op, int error, int candelete) 700{ 701 struct nfsclclient *clp; 702 struct nfsclowner *owp; 703 704 if (op == NULL) 705 return; 706 NFSLOCKCLSTATE(); 707 owp = op->nfso_own; 708 nfscl_lockunlock(&owp->nfsow_rwlock); 709 clp = owp->nfsow_clp; 710 if (error && candelete && op->nfso_opencnt == 0) 711 nfscl_freeopen(op, 0); 712 nfscl_clrelease(clp); 713 NFSUNLOCKCLSTATE(); 714} 715 716/* 717 * Called to get a clientid structure. It will optionally lock the 718 * client data structures to do the SetClientId/SetClientId_confirm, 719 * but will release that lock and return the clientid with a refernce 720 * count on it. 721 * If the "cred" argument is NULL, a new clientid should not be created. 722 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 723 * be done. 724 * The start_renewthread argument tells nfscl_getcl() to start a renew 725 * thread if this creates a new clp. 726 * It always clpp with a reference count on it, unless returning an error. 727 */ 728APPLESTATIC int 729nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p, 730 int start_renewthread, struct nfsclclient **clpp) 731{ 732 struct nfsclclient *clp; 733 struct nfsclclient *newclp = NULL; 734 struct nfsmount *nmp; 735 char uuid[HOSTUUIDLEN]; 736 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 737 u_int16_t idlen = 0; 738 739 nmp = VFSTONFS(mp); 740 if (cred != NULL) { 741 getcredhostuuid(cred, uuid, sizeof uuid); 742 idlen = strlen(uuid); 743 if (idlen > 0) 744 idlen += sizeof (u_int64_t); 745 else 746 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 747 MALLOC(newclp, struct nfsclclient *, 748 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 749 M_WAITOK | M_ZERO); 750 } 751 NFSLOCKCLSTATE(); 752 /* 753 * If a forced dismount is already in progress, don't 754 * allocate a new clientid and get out now. For the case where 755 * clp != NULL, this is a harmless optimization. 756 */ 757 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 758 NFSUNLOCKCLSTATE(); 759 if (newclp != NULL) 760 free(newclp, M_NFSCLCLIENT); 761 return (EBADF); 762 } 763 clp = nmp->nm_clp; 764 if (clp == NULL) { 765 if (newclp == NULL) { 766 NFSUNLOCKCLSTATE(); 767 return (EACCES); 768 } 769 clp = newclp; 770 clp->nfsc_idlen = idlen; 771 LIST_INIT(&clp->nfsc_owner); 772 TAILQ_INIT(&clp->nfsc_deleg); 773 TAILQ_INIT(&clp->nfsc_layout); 774 LIST_INIT(&clp->nfsc_devinfo); 775 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 776 LIST_INIT(&clp->nfsc_deleghash[i]); 777 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 778 LIST_INIT(&clp->nfsc_layouthash[i]); 779 clp->nfsc_flags = NFSCLFLAGS_INITED; 780 clp->nfsc_clientidrev = 1; 781 clp->nfsc_cbident = nfscl_nextcbident(); 782 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 783 clp->nfsc_idlen); 784 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 785 nmp->nm_clp = clp; 786 clp->nfsc_nmp = nmp; 787 NFSUNLOCKCLSTATE(); 788 if (start_renewthread != 0) 789 nfscl_start_renewthread(clp); 790 } else { 791 NFSUNLOCKCLSTATE(); 792 if (newclp != NULL) 793 free(newclp, M_NFSCLCLIENT); 794 } 795 NFSLOCKCLSTATE(); 796 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 797 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0) 798 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 799 NFSCLSTATEMUTEXPTR, mp); 800 if (igotlock == 0) { 801 /* 802 * Call nfsv4_lock() with "iwantlock == 0" so that it will 803 * wait for a pending exclusive lock request. This gives the 804 * exclusive lock request priority over this shared lock 805 * request. 806 * An exclusive lock on nfsc_lock is used mainly for server 807 * crash recoveries. 808 */ 809 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp); 810 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 811 } 812 if (igotlock == 0 && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 813 /* 814 * Both nfsv4_lock() and nfsv4_getref() know to check 815 * for MNTK_UNMOUNTF and return without sleeping to 816 * wait for the exclusive lock to be released, since it 817 * might be held by nfscl_umount() and we need to get out 818 * now for that case and not wait until nfscl_umount() 819 * releases it. 820 */ 821 NFSUNLOCKCLSTATE(); 822 return (EBADF); 823 } 824 NFSUNLOCKCLSTATE(); 825 826 /* 827 * If it needs a clientid, do the setclientid now. 828 */ 829 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 830 if (!igotlock) 831 panic("nfscl_clget"); 832 if (p == NULL || cred == NULL) { 833 NFSLOCKCLSTATE(); 834 nfsv4_unlock(&clp->nfsc_lock, 0); 835 NFSUNLOCKCLSTATE(); 836 return (EACCES); 837 } 838 /* 839 * If RFC3530 Sec. 14.2.33 is taken literally, 840 * NFSERR_CLIDINUSE will be returned persistently for the 841 * case where a new mount of the same file system is using 842 * a different principal. In practice, NFSERR_CLIDINUSE is 843 * only returned when there is outstanding unexpired state 844 * on the clientid. As such, try for twice the lease 845 * interval, if we know what that is. Otherwise, make a 846 * wild ass guess. 847 * The case of returning NFSERR_STALECLIENTID is far less 848 * likely, but might occur if there is a significant delay 849 * between doing the SetClientID and SetClientIDConfirm Ops, 850 * such that the server throws away the clientid before 851 * receiving the SetClientIDConfirm. 852 */ 853 if (clp->nfsc_renew > 0) 854 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 855 else 856 clidinusedelay = 120; 857 trystalecnt = 3; 858 do { 859 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 860 if (error == NFSERR_STALECLIENTID || 861 error == NFSERR_STALEDONTRECOVER || 862 error == NFSERR_BADSESSION || 863 error == NFSERR_CLIDINUSE) { 864 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 865 } 866 } while (((error == NFSERR_STALECLIENTID || 867 error == NFSERR_BADSESSION || 868 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 869 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 870 if (error) { 871 NFSLOCKCLSTATE(); 872 nfsv4_unlock(&clp->nfsc_lock, 0); 873 NFSUNLOCKCLSTATE(); 874 return (error); 875 } 876 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 877 } 878 if (igotlock) { 879 NFSLOCKCLSTATE(); 880 nfsv4_unlock(&clp->nfsc_lock, 1); 881 NFSUNLOCKCLSTATE(); 882 } 883 884 *clpp = clp; 885 return (0); 886} 887 888/* 889 * Get a reference to a clientid and return it, if valid. 890 */ 891APPLESTATIC struct nfsclclient * 892nfscl_findcl(struct nfsmount *nmp) 893{ 894 struct nfsclclient *clp; 895 896 clp = nmp->nm_clp; 897 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 898 return (NULL); 899 return (clp); 900} 901 902/* 903 * Release the clientid structure. It may be locked or reference counted. 904 */ 905static void 906nfscl_clrelease(struct nfsclclient *clp) 907{ 908 909 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 910 nfsv4_unlock(&clp->nfsc_lock, 0); 911 else 912 nfsv4_relref(&clp->nfsc_lock); 913} 914 915/* 916 * External call for nfscl_clrelease. 917 */ 918APPLESTATIC void 919nfscl_clientrelease(struct nfsclclient *clp) 920{ 921 922 NFSLOCKCLSTATE(); 923 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 924 nfsv4_unlock(&clp->nfsc_lock, 0); 925 else 926 nfsv4_relref(&clp->nfsc_lock); 927 NFSUNLOCKCLSTATE(); 928} 929 930/* 931 * Called when wanting to lock a byte region. 932 */ 933APPLESTATIC int 934nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 935 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 936 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 937 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 938{ 939 struct nfscllockowner *lp; 940 struct nfsclopen *op; 941 struct nfsclclient *clp; 942 struct nfscllockowner *nlp; 943 struct nfscllock *nlop, *otherlop; 944 struct nfscldeleg *dp = NULL, *ldp = NULL; 945 struct nfscllockownerhead *lhp = NULL; 946 struct nfsnode *np; 947 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 948 u_int8_t *openownp; 949 int error = 0, ret, donelocally = 0; 950 u_int32_t mode; 951 952 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 953 mode = 0; 954 np = VTONFS(vp); 955 *lpp = NULL; 956 lp = NULL; 957 *newonep = 0; 958 *donelocallyp = 0; 959 960 /* 961 * Might need these, so MALLOC them now, to 962 * avoid a tsleep() in MALLOC later. 963 */ 964 MALLOC(nlp, struct nfscllockowner *, 965 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 966 MALLOC(otherlop, struct nfscllock *, 967 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 968 MALLOC(nlop, struct nfscllock *, 969 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 970 nlop->nfslo_type = type; 971 nlop->nfslo_first = off; 972 if (len == NFS64BITSSET) { 973 nlop->nfslo_end = NFS64BITSSET; 974 } else { 975 nlop->nfslo_end = off + len; 976 if (nlop->nfslo_end <= nlop->nfslo_first) 977 error = NFSERR_INVAL; 978 } 979 980 if (!error) { 981 if (recovery) 982 clp = rclp; 983 else 984 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 985 } 986 if (error) { 987 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 988 FREE((caddr_t)otherlop, M_NFSCLLOCK); 989 FREE((caddr_t)nlop, M_NFSCLLOCK); 990 return (error); 991 } 992 993 op = NULL; 994 if (recovery) { 995 ownp = rownp; 996 openownp = ropenownp; 997 } else { 998 nfscl_filllockowner(id, own, flags); 999 ownp = own; 1000 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 1001 openownp = openown; 1002 } 1003 if (!recovery) { 1004 NFSLOCKCLSTATE(); 1005 /* 1006 * First, search for a delegation. If one exists for this file, 1007 * the lock can be done locally against it, so long as there 1008 * isn't a local lock conflict. 1009 */ 1010 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1011 np->n_fhp->nfh_len); 1012 /* Just sanity check for correct type of delegation */ 1013 if (dp != NULL && ((dp->nfsdl_flags & 1014 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 1015 (type == F_WRLCK && 1016 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 1017 dp = NULL; 1018 } 1019 if (dp != NULL) { 1020 /* Now, find an open and maybe a lockowner. */ 1021 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 1022 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 1023 if (ret) 1024 ret = nfscl_getopen(&clp->nfsc_owner, 1025 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1026 ownp, mode, NULL, &op); 1027 if (!ret) { 1028 lhp = &dp->nfsdl_lock; 1029 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 1030 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 1031 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 1032 donelocally = 1; 1033 } else { 1034 dp = NULL; 1035 } 1036 } 1037 if (!donelocally) { 1038 /* 1039 * Get the related Open and maybe lockowner. 1040 */ 1041 error = nfscl_getopen(&clp->nfsc_owner, 1042 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1043 ownp, mode, &lp, &op); 1044 if (!error) 1045 lhp = &op->nfso_lock; 1046 } 1047 if (!error && !recovery) 1048 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1049 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1050 if (error) { 1051 if (!recovery) { 1052 nfscl_clrelease(clp); 1053 NFSUNLOCKCLSTATE(); 1054 } 1055 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1056 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1057 FREE((caddr_t)nlop, M_NFSCLLOCK); 1058 return (error); 1059 } 1060 1061 /* 1062 * Ok, see if a lockowner exists and create one, as required. 1063 */ 1064 if (lp == NULL) 1065 LIST_FOREACH(lp, lhp, nfsl_list) { 1066 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1067 break; 1068 } 1069 if (lp == NULL) { 1070 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1071 if (recovery) 1072 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1073 NFSV4CL_LOCKNAMELEN); 1074 else 1075 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1076 NFSV4CL_LOCKNAMELEN); 1077 nlp->nfsl_seqid = 0; 1078 nlp->nfsl_lockflags = flags; 1079 nlp->nfsl_inprog = NULL; 1080 nfscl_lockinit(&nlp->nfsl_rwlock); 1081 LIST_INIT(&nlp->nfsl_lock); 1082 if (donelocally) { 1083 nlp->nfsl_open = NULL; 1084 newnfsstats.cllocallockowners++; 1085 } else { 1086 nlp->nfsl_open = op; 1087 newnfsstats.cllockowners++; 1088 } 1089 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1090 lp = nlp; 1091 nlp = NULL; 1092 *newonep = 1; 1093 } 1094 1095 /* 1096 * Now, update the byte ranges for locks. 1097 */ 1098 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1099 if (!ret) 1100 donelocally = 1; 1101 if (donelocally) { 1102 *donelocallyp = 1; 1103 if (!recovery) 1104 nfscl_clrelease(clp); 1105 } else { 1106 /* 1107 * Serial modifications on the lock owner for multiple threads 1108 * for the same process using a read/write lock. 1109 */ 1110 if (!recovery) 1111 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1112 } 1113 if (!recovery) 1114 NFSUNLOCKCLSTATE(); 1115 1116 if (nlp) 1117 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1118 if (nlop) 1119 FREE((caddr_t)nlop, M_NFSCLLOCK); 1120 if (otherlop) 1121 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1122 1123 *lpp = lp; 1124 return (0); 1125} 1126 1127/* 1128 * Called to unlock a byte range, for LockU. 1129 */ 1130APPLESTATIC int 1131nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1132 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1133 struct nfsclclient *clp, void *id, int flags, 1134 struct nfscllockowner **lpp, int *dorpcp) 1135{ 1136 struct nfscllockowner *lp; 1137 struct nfsclowner *owp; 1138 struct nfsclopen *op; 1139 struct nfscllock *nlop, *other_lop = NULL; 1140 struct nfscldeleg *dp; 1141 struct nfsnode *np; 1142 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1143 int ret = 0, fnd; 1144 1145 np = VTONFS(vp); 1146 *lpp = NULL; 1147 *dorpcp = 0; 1148 1149 /* 1150 * Might need these, so MALLOC them now, to 1151 * avoid a tsleep() in MALLOC later. 1152 */ 1153 MALLOC(nlop, struct nfscllock *, 1154 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1155 nlop->nfslo_type = F_UNLCK; 1156 nlop->nfslo_first = off; 1157 if (len == NFS64BITSSET) { 1158 nlop->nfslo_end = NFS64BITSSET; 1159 } else { 1160 nlop->nfslo_end = off + len; 1161 if (nlop->nfslo_end <= nlop->nfslo_first) { 1162 FREE((caddr_t)nlop, M_NFSCLLOCK); 1163 return (NFSERR_INVAL); 1164 } 1165 } 1166 if (callcnt == 0) { 1167 MALLOC(other_lop, struct nfscllock *, 1168 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1169 *other_lop = *nlop; 1170 } 1171 nfscl_filllockowner(id, own, flags); 1172 dp = NULL; 1173 NFSLOCKCLSTATE(); 1174 if (callcnt == 0) 1175 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1176 np->n_fhp->nfh_len); 1177 1178 /* 1179 * First, unlock any local regions on a delegation. 1180 */ 1181 if (dp != NULL) { 1182 /* Look for this lockowner. */ 1183 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1184 if (!NFSBCMP(lp->nfsl_owner, own, 1185 NFSV4CL_LOCKNAMELEN)) 1186 break; 1187 } 1188 if (lp != NULL) 1189 /* Use other_lop, so nlop is still available */ 1190 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1191 } 1192 1193 /* 1194 * Now, find a matching open/lockowner that hasn't already been done, 1195 * as marked by nfsl_inprog. 1196 */ 1197 lp = NULL; 1198 fnd = 0; 1199 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1200 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1201 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1202 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1203 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1204 if (lp->nfsl_inprog == NULL && 1205 !NFSBCMP(lp->nfsl_owner, own, 1206 NFSV4CL_LOCKNAMELEN)) { 1207 fnd = 1; 1208 break; 1209 } 1210 } 1211 if (fnd) 1212 break; 1213 } 1214 } 1215 if (fnd) 1216 break; 1217 } 1218 1219 if (lp != NULL) { 1220 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1221 if (ret) 1222 *dorpcp = 1; 1223 /* 1224 * Serial modifications on the lock owner for multiple 1225 * threads for the same process using a read/write lock. 1226 */ 1227 lp->nfsl_inprog = p; 1228 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1229 *lpp = lp; 1230 } 1231 NFSUNLOCKCLSTATE(); 1232 if (nlop) 1233 FREE((caddr_t)nlop, M_NFSCLLOCK); 1234 if (other_lop) 1235 FREE((caddr_t)other_lop, M_NFSCLLOCK); 1236 return (0); 1237} 1238 1239/* 1240 * Release all lockowners marked in progess for this process and file. 1241 */ 1242APPLESTATIC void 1243nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1244 void *id, int flags) 1245{ 1246 struct nfsclowner *owp; 1247 struct nfsclopen *op; 1248 struct nfscllockowner *lp; 1249 struct nfsnode *np; 1250 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1251 1252 np = VTONFS(vp); 1253 nfscl_filllockowner(id, own, flags); 1254 NFSLOCKCLSTATE(); 1255 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1256 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1257 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1258 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1259 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1260 if (lp->nfsl_inprog == p && 1261 !NFSBCMP(lp->nfsl_owner, own, 1262 NFSV4CL_LOCKNAMELEN)) { 1263 lp->nfsl_inprog = NULL; 1264 nfscl_lockunlock(&lp->nfsl_rwlock); 1265 } 1266 } 1267 } 1268 } 1269 } 1270 nfscl_clrelease(clp); 1271 NFSUNLOCKCLSTATE(); 1272} 1273 1274/* 1275 * Called to find out if any bytes within the byte range specified are 1276 * write locked by the calling process. Used to determine if flushing 1277 * is required before a LockU. 1278 * If in doubt, return 1, so the flush will occur. 1279 */ 1280APPLESTATIC int 1281nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1282 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1283{ 1284 struct nfsclowner *owp; 1285 struct nfscllockowner *lp; 1286 struct nfsclopen *op; 1287 struct nfsclclient *clp; 1288 struct nfscllock *lop; 1289 struct nfscldeleg *dp; 1290 struct nfsnode *np; 1291 u_int64_t off, end; 1292 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1293 int error = 0; 1294 1295 np = VTONFS(vp); 1296 switch (fl->l_whence) { 1297 case SEEK_SET: 1298 case SEEK_CUR: 1299 /* 1300 * Caller is responsible for adding any necessary offset 1301 * when SEEK_CUR is used. 1302 */ 1303 off = fl->l_start; 1304 break; 1305 case SEEK_END: 1306 off = np->n_size + fl->l_start; 1307 break; 1308 default: 1309 return (1); 1310 }; 1311 if (fl->l_len != 0) { 1312 end = off + fl->l_len; 1313 if (end < off) 1314 return (1); 1315 } else { 1316 end = NFS64BITSSET; 1317 } 1318 1319 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1320 if (error) 1321 return (1); 1322 nfscl_filllockowner(id, own, flags); 1323 NFSLOCKCLSTATE(); 1324 1325 /* 1326 * First check the delegation locks. 1327 */ 1328 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1329 if (dp != NULL) { 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 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1337 if (lop->nfslo_first >= end) 1338 break; 1339 if (lop->nfslo_end <= off) 1340 continue; 1341 if (lop->nfslo_type == F_WRLCK) { 1342 nfscl_clrelease(clp); 1343 NFSUNLOCKCLSTATE(); 1344 return (1); 1345 } 1346 } 1347 } 1348 } 1349 1350 /* 1351 * Now, check state against the server. 1352 */ 1353 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1354 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1355 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1356 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1357 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1358 if (!NFSBCMP(lp->nfsl_owner, own, 1359 NFSV4CL_LOCKNAMELEN)) 1360 break; 1361 } 1362 if (lp != NULL) { 1363 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1364 if (lop->nfslo_first >= end) 1365 break; 1366 if (lop->nfslo_end <= off) 1367 continue; 1368 if (lop->nfslo_type == F_WRLCK) { 1369 nfscl_clrelease(clp); 1370 NFSUNLOCKCLSTATE(); 1371 return (1); 1372 } 1373 } 1374 } 1375 } 1376 } 1377 } 1378 nfscl_clrelease(clp); 1379 NFSUNLOCKCLSTATE(); 1380 return (0); 1381} 1382 1383/* 1384 * Release a byte range lock owner structure. 1385 */ 1386APPLESTATIC void 1387nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1388{ 1389 struct nfsclclient *clp; 1390 1391 if (lp == NULL) 1392 return; 1393 NFSLOCKCLSTATE(); 1394 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1395 if (error != 0 && candelete && 1396 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1397 nfscl_freelockowner(lp, 0); 1398 else 1399 nfscl_lockunlock(&lp->nfsl_rwlock); 1400 nfscl_clrelease(clp); 1401 NFSUNLOCKCLSTATE(); 1402} 1403 1404/* 1405 * Free up an open structure and any associated byte range lock structures. 1406 */ 1407APPLESTATIC void 1408nfscl_freeopen(struct nfsclopen *op, int local) 1409{ 1410 1411 LIST_REMOVE(op, nfso_list); 1412 nfscl_freealllocks(&op->nfso_lock, local); 1413 FREE((caddr_t)op, M_NFSCLOPEN); 1414 if (local) 1415 newnfsstats.cllocalopens--; 1416 else 1417 newnfsstats.clopens--; 1418} 1419 1420/* 1421 * Free up all lock owners and associated locks. 1422 */ 1423static void 1424nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1425{ 1426 struct nfscllockowner *lp, *nlp; 1427 1428 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1429 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1430 panic("nfscllckw"); 1431 nfscl_freelockowner(lp, local); 1432 } 1433} 1434 1435/* 1436 * Called for an Open when NFSERR_EXPIRED is received from the server. 1437 * If there are no byte range locks nor a Share Deny lost, try to do a 1438 * fresh Open. Otherwise, free the open. 1439 */ 1440static int 1441nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1442 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1443{ 1444 struct nfscllockowner *lp; 1445 struct nfscldeleg *dp; 1446 int mustdelete = 0, error; 1447 1448 /* 1449 * Look for any byte range lock(s). 1450 */ 1451 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1452 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1453 mustdelete = 1; 1454 break; 1455 } 1456 } 1457 1458 /* 1459 * If no byte range lock(s) nor a Share deny, try to re-open. 1460 */ 1461 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1462 newnfs_copycred(&op->nfso_cred, cred); 1463 dp = NULL; 1464 error = nfsrpc_reopen(nmp, op->nfso_fh, 1465 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1466 if (error) { 1467 mustdelete = 1; 1468 if (dp != NULL) { 1469 FREE((caddr_t)dp, M_NFSCLDELEG); 1470 dp = NULL; 1471 } 1472 } 1473 if (dp != NULL) 1474 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1475 op->nfso_fhlen, cred, p, &dp); 1476 } 1477 1478 /* 1479 * If a byte range lock or Share deny or couldn't re-open, free it. 1480 */ 1481 if (mustdelete) 1482 nfscl_freeopen(op, 0); 1483 return (mustdelete); 1484} 1485 1486/* 1487 * Free up an open owner structure. 1488 */ 1489static void 1490nfscl_freeopenowner(struct nfsclowner *owp, int local) 1491{ 1492 1493 LIST_REMOVE(owp, nfsow_list); 1494 FREE((caddr_t)owp, M_NFSCLOWNER); 1495 if (local) 1496 newnfsstats.cllocalopenowners--; 1497 else 1498 newnfsstats.clopenowners--; 1499} 1500 1501/* 1502 * Free up a byte range lock owner structure. 1503 */ 1504APPLESTATIC void 1505nfscl_freelockowner(struct nfscllockowner *lp, int local) 1506{ 1507 struct nfscllock *lop, *nlop; 1508 1509 LIST_REMOVE(lp, nfsl_list); 1510 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1511 nfscl_freelock(lop, local); 1512 } 1513 FREE((caddr_t)lp, M_NFSCLLOCKOWNER); 1514 if (local) 1515 newnfsstats.cllocallockowners--; 1516 else 1517 newnfsstats.cllockowners--; 1518} 1519 1520/* 1521 * Free up a byte range lock structure. 1522 */ 1523APPLESTATIC void 1524nfscl_freelock(struct nfscllock *lop, int local) 1525{ 1526 1527 LIST_REMOVE(lop, nfslo_list); 1528 FREE((caddr_t)lop, M_NFSCLLOCK); 1529 if (local) 1530 newnfsstats.cllocallocks--; 1531 else 1532 newnfsstats.cllocks--; 1533} 1534 1535/* 1536 * Clean out the state related to a delegation. 1537 */ 1538static void 1539nfscl_cleandeleg(struct nfscldeleg *dp) 1540{ 1541 struct nfsclowner *owp, *nowp; 1542 struct nfsclopen *op; 1543 1544 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1545 op = LIST_FIRST(&owp->nfsow_open); 1546 if (op != NULL) { 1547 if (LIST_NEXT(op, nfso_list) != NULL) 1548 panic("nfscleandel"); 1549 nfscl_freeopen(op, 1); 1550 } 1551 nfscl_freeopenowner(owp, 1); 1552 } 1553 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1554} 1555 1556/* 1557 * Free a delegation. 1558 */ 1559static void 1560nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1561{ 1562 1563 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1564 LIST_REMOVE(dp, nfsdl_hash); 1565 FREE((caddr_t)dp, M_NFSCLDELEG); 1566 newnfsstats.cldelegates--; 1567 nfscl_delegcnt--; 1568} 1569 1570/* 1571 * Free up all state related to this client structure. 1572 */ 1573static void 1574nfscl_cleanclient(struct nfsclclient *clp) 1575{ 1576 struct nfsclowner *owp, *nowp; 1577 struct nfsclopen *op, *nop; 1578 1579 /* Now, all the OpenOwners, etc. */ 1580 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1581 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1582 nfscl_freeopen(op, 0); 1583 } 1584 nfscl_freeopenowner(owp, 0); 1585 } 1586} 1587 1588/* 1589 * Called when an NFSERR_EXPIRED is received from the server. 1590 */ 1591static void 1592nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1593 struct ucred *cred, NFSPROC_T *p) 1594{ 1595 struct nfsclowner *owp, *nowp, *towp; 1596 struct nfsclopen *op, *nop, *top; 1597 struct nfscldeleg *dp, *ndp; 1598 int ret, printed = 0; 1599 1600 /* 1601 * First, merge locally issued Opens into the list for the server. 1602 */ 1603 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1604 while (dp != NULL) { 1605 ndp = TAILQ_NEXT(dp, nfsdl_list); 1606 owp = LIST_FIRST(&dp->nfsdl_owner); 1607 while (owp != NULL) { 1608 nowp = LIST_NEXT(owp, nfsow_list); 1609 op = LIST_FIRST(&owp->nfsow_open); 1610 if (op != NULL) { 1611 if (LIST_NEXT(op, nfso_list) != NULL) 1612 panic("nfsclexp"); 1613 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1614 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1615 NFSV4CL_LOCKNAMELEN)) 1616 break; 1617 } 1618 if (towp != NULL) { 1619 /* Merge opens in */ 1620 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1621 if (top->nfso_fhlen == op->nfso_fhlen && 1622 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1623 op->nfso_fhlen)) { 1624 top->nfso_mode |= op->nfso_mode; 1625 top->nfso_opencnt += op->nfso_opencnt; 1626 break; 1627 } 1628 } 1629 if (top == NULL) { 1630 /* Just add the open to the owner list */ 1631 LIST_REMOVE(op, nfso_list); 1632 op->nfso_own = towp; 1633 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1634 newnfsstats.cllocalopens--; 1635 newnfsstats.clopens++; 1636 } 1637 } else { 1638 /* Just add the openowner to the client list */ 1639 LIST_REMOVE(owp, nfsow_list); 1640 owp->nfsow_clp = clp; 1641 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1642 newnfsstats.cllocalopenowners--; 1643 newnfsstats.clopenowners++; 1644 newnfsstats.cllocalopens--; 1645 newnfsstats.clopens++; 1646 } 1647 } 1648 owp = nowp; 1649 } 1650 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1651 printed = 1; 1652 printf("nfsv4 expired locks lost\n"); 1653 } 1654 nfscl_cleandeleg(dp); 1655 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1656 dp = ndp; 1657 } 1658 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1659 panic("nfsclexp"); 1660 1661 /* 1662 * Now, try and reopen against the server. 1663 */ 1664 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1665 owp->nfsow_seqid = 0; 1666 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1667 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1668 if (ret && !printed) { 1669 printed = 1; 1670 printf("nfsv4 expired locks lost\n"); 1671 } 1672 } 1673 if (LIST_EMPTY(&owp->nfsow_open)) 1674 nfscl_freeopenowner(owp, 0); 1675 } 1676} 1677 1678/* 1679 * This function must be called after the process represented by "own" has 1680 * exited. Must be called with CLSTATE lock held. 1681 */ 1682static void 1683nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1684{ 1685 struct nfsclowner *owp, *nowp; 1686 struct nfscllockowner *lp, *nlp; 1687 struct nfscldeleg *dp; 1688 1689 /* First, get rid of local locks on delegations. */ 1690 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1691 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1692 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1693 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1694 panic("nfscllckw"); 1695 nfscl_freelockowner(lp, 1); 1696 } 1697 } 1698 } 1699 owp = LIST_FIRST(&clp->nfsc_owner); 1700 while (owp != NULL) { 1701 nowp = LIST_NEXT(owp, nfsow_list); 1702 if (!NFSBCMP(owp->nfsow_owner, own, 1703 NFSV4CL_LOCKNAMELEN)) { 1704 /* 1705 * If there are children that haven't closed the 1706 * file descriptors yet, the opens will still be 1707 * here. For that case, let the renew thread clear 1708 * out the OpenOwner later. 1709 */ 1710 if (LIST_EMPTY(&owp->nfsow_open)) 1711 nfscl_freeopenowner(owp, 0); 1712 else 1713 owp->nfsow_defunct = 1; 1714 } 1715 owp = nowp; 1716 } 1717} 1718 1719/* 1720 * Find open/lock owners for processes that have exited. 1721 */ 1722static void 1723nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1724{ 1725 struct nfsclowner *owp, *nowp; 1726 struct nfsclopen *op; 1727 struct nfscllockowner *lp, *nlp; 1728 1729 NFSPROCLISTLOCK(); 1730 NFSLOCKCLSTATE(); 1731 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1732 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1733 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1734 if (LIST_EMPTY(&lp->nfsl_lock)) 1735 nfscl_emptylockowner(lp, lhp); 1736 } 1737 } 1738 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1739 nfscl_cleanup_common(clp, owp->nfsow_owner); 1740 } 1741 NFSUNLOCKCLSTATE(); 1742 NFSPROCLISTUNLOCK(); 1743} 1744 1745/* 1746 * Take the empty lock owner and move it to the local lhp list if the 1747 * associated process no longer exists. 1748 */ 1749static void 1750nfscl_emptylockowner(struct nfscllockowner *lp, 1751 struct nfscllockownerfhhead *lhp) 1752{ 1753 struct nfscllockownerfh *lfhp, *mylfhp; 1754 struct nfscllockowner *nlp; 1755 int fnd_it; 1756 1757 /* If not a Posix lock owner, just return. */ 1758 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1759 return; 1760 1761 fnd_it = 0; 1762 mylfhp = NULL; 1763 /* 1764 * First, search to see if this lock owner is already in the list. 1765 * If it is, then the associated process no longer exists. 1766 */ 1767 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1768 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1769 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1770 lfhp->nfslfh_len)) 1771 mylfhp = lfhp; 1772 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1773 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1774 NFSV4CL_LOCKNAMELEN)) 1775 fnd_it = 1; 1776 } 1777 /* If not found, check if process still exists. */ 1778 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1779 return; 1780 1781 /* Move the lock owner over to the local list. */ 1782 if (mylfhp == NULL) { 1783 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1784 M_NOWAIT); 1785 if (mylfhp == NULL) 1786 return; 1787 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1788 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1789 mylfhp->nfslfh_len); 1790 LIST_INIT(&mylfhp->nfslfh_lock); 1791 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1792 } 1793 LIST_REMOVE(lp, nfsl_list); 1794 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1795} 1796 1797static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1798/* 1799 * Called from nfs umount to free up the clientid. 1800 */ 1801APPLESTATIC void 1802nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1803{ 1804 struct nfsclclient *clp; 1805 struct ucred *cred; 1806 int igotlock; 1807 1808 /* 1809 * For the case that matters, this is the thread that set 1810 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1811 * done to ensure that any thread executing nfscl_getcl() after 1812 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1813 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1814 * explanation, courtesy of Alan Cox. 1815 * What follows is a snippet from Alan Cox's email at: 1816 * http://docs.FreeBSD.org/cgi/ 1817 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1818 * 1819 * 1. Set MNTK_UNMOUNTF 1820 * 2. Acquire a standard FreeBSD mutex "m". 1821 * 3. Update some data structures. 1822 * 4. Release mutex "m". 1823 * 1824 * Then, other threads that acquire "m" after step 4 has occurred will 1825 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1826 * step 2 may or may not see MNTK_UNMOUNTF as set. 1827 */ 1828 NFSLOCKCLSTATE(); 1829 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1830 fake_global++; 1831 NFSUNLOCKCLSTATE(); 1832 NFSLOCKCLSTATE(); 1833 } 1834 1835 clp = nmp->nm_clp; 1836 if (clp != NULL) { 1837 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1838 panic("nfscl umount"); 1839 1840 /* 1841 * First, handshake with the nfscl renew thread, to terminate 1842 * it. 1843 */ 1844 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1845 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1846 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1847 "nfsclumnt", hz); 1848 1849 /* 1850 * Now, get the exclusive lock on the client state, so 1851 * that no uses of the state are still in progress. 1852 */ 1853 do { 1854 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1855 NFSCLSTATEMUTEXPTR, NULL); 1856 } while (!igotlock); 1857 NFSUNLOCKCLSTATE(); 1858 1859 /* 1860 * Free up all the state. It will expire on the server, but 1861 * maybe we should do a SetClientId/SetClientIdConfirm so 1862 * the server throws it away? 1863 */ 1864 LIST_REMOVE(clp, nfsc_list); 1865 nfscl_delegreturnall(clp, p); 1866 cred = newnfs_getcred(); 1867 if (NFSHASNFSV4N(nmp)) { 1868 (void)nfsrpc_destroysession(nmp, clp, cred, p); 1869 (void)nfsrpc_destroyclient(nmp, clp, cred, p); 1870 } else 1871 (void)nfsrpc_setclient(nmp, clp, 0, cred, p); 1872 nfscl_cleanclient(clp); 1873 nmp->nm_clp = NULL; 1874 NFSFREECRED(cred); 1875 free(clp, M_NFSCLCLIENT); 1876 } else 1877 NFSUNLOCKCLSTATE(); 1878} 1879 1880/* 1881 * This function is called when a server replies with NFSERR_STALECLIENTID 1882 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 1883 * doing Opens and Locks with reclaim. If these fail, it deletes the 1884 * corresponding state. 1885 */ 1886static void 1887nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1888{ 1889 struct nfsclowner *owp, *nowp; 1890 struct nfsclopen *op, *nop; 1891 struct nfscllockowner *lp, *nlp; 1892 struct nfscllock *lop, *nlop; 1893 struct nfscldeleg *dp, *ndp, *tdp; 1894 struct nfsmount *nmp; 1895 struct ucred *tcred; 1896 struct nfsclopenhead extra_open; 1897 struct nfscldeleghead extra_deleg; 1898 struct nfsreq *rep; 1899 u_int64_t len; 1900 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1901 int i, igotlock = 0, error, trycnt, firstlock; 1902 struct nfscllayout *lyp, *nlyp; 1903 1904 /* 1905 * First, lock the client structure, so everyone else will 1906 * block when trying to use state. 1907 */ 1908 NFSLOCKCLSTATE(); 1909 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1910 do { 1911 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1912 NFSCLSTATEMUTEXPTR, NULL); 1913 } while (!igotlock); 1914 NFSUNLOCKCLSTATE(); 1915 1916 nmp = clp->nfsc_nmp; 1917 if (nmp == NULL) 1918 panic("nfscl recover"); 1919 1920 /* 1921 * For now, just get rid of all layouts. There may be a need 1922 * to do LayoutCommit Ops with reclaim == true later. 1923 */ 1924 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 1925 nfscl_freelayout(lyp); 1926 TAILQ_INIT(&clp->nfsc_layout); 1927 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 1928 LIST_INIT(&clp->nfsc_layouthash[i]); 1929 1930 trycnt = 5; 1931 do { 1932 error = nfsrpc_setclient(nmp, clp, 1, cred, p); 1933 } while ((error == NFSERR_STALECLIENTID || 1934 error == NFSERR_BADSESSION || 1935 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 1936 if (error) { 1937 NFSLOCKCLSTATE(); 1938 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 1939 NFSCLFLAGS_RECVRINPROG); 1940 wakeup(&clp->nfsc_flags); 1941 nfsv4_unlock(&clp->nfsc_lock, 0); 1942 NFSUNLOCKCLSTATE(); 1943 return; 1944 } 1945 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 1946 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 1947 1948 /* 1949 * Mark requests already queued on the server, so that they don't 1950 * initiate another recovery cycle. Any requests already in the 1951 * queue that handle state information will have the old stale 1952 * clientid/stateid and will get a NFSERR_STALESTATEID, 1953 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 1954 * This will be translated to NFSERR_STALEDONTRECOVER when 1955 * R_DONTRECOVER is set. 1956 */ 1957 NFSLOCKREQ(); 1958 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 1959 if (rep->r_nmp == nmp) 1960 rep->r_flags |= R_DONTRECOVER; 1961 } 1962 NFSUNLOCKREQ(); 1963 1964 /* 1965 * Now, mark all delegations "need reclaim". 1966 */ 1967 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 1968 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 1969 1970 TAILQ_INIT(&extra_deleg); 1971 LIST_INIT(&extra_open); 1972 /* 1973 * Now traverse the state lists, doing Open and Lock Reclaims. 1974 */ 1975 tcred = newnfs_getcred(); 1976 owp = LIST_FIRST(&clp->nfsc_owner); 1977 while (owp != NULL) { 1978 nowp = LIST_NEXT(owp, nfsow_list); 1979 owp->nfsow_seqid = 0; 1980 op = LIST_FIRST(&owp->nfsow_open); 1981 while (op != NULL) { 1982 nop = LIST_NEXT(op, nfso_list); 1983 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 1984 /* Search for a delegation to reclaim with the open */ 1985 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1986 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1987 continue; 1988 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 1989 mode = NFSV4OPEN_ACCESSWRITE; 1990 delegtype = NFSV4OPEN_DELEGATEWRITE; 1991 } else { 1992 mode = NFSV4OPEN_ACCESSREAD; 1993 delegtype = NFSV4OPEN_DELEGATEREAD; 1994 } 1995 if ((op->nfso_mode & mode) == mode && 1996 op->nfso_fhlen == dp->nfsdl_fhlen && 1997 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 1998 break; 1999 } 2000 ndp = dp; 2001 if (dp == NULL) 2002 delegtype = NFSV4OPEN_DELEGATENONE; 2003 newnfs_copycred(&op->nfso_cred, tcred); 2004 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2005 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2006 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2007 tcred, p); 2008 if (!error) { 2009 /* Handle any replied delegation */ 2010 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2011 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2012 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2013 mode = NFSV4OPEN_ACCESSWRITE; 2014 else 2015 mode = NFSV4OPEN_ACCESSREAD; 2016 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2017 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2018 continue; 2019 if ((op->nfso_mode & mode) == mode && 2020 op->nfso_fhlen == dp->nfsdl_fhlen && 2021 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2022 op->nfso_fhlen)) { 2023 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2024 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2025 dp->nfsdl_ace = ndp->nfsdl_ace; 2026 dp->nfsdl_change = ndp->nfsdl_change; 2027 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2028 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2029 dp->nfsdl_flags |= NFSCLDL_RECALL; 2030 FREE((caddr_t)ndp, M_NFSCLDELEG); 2031 ndp = NULL; 2032 break; 2033 } 2034 } 2035 } 2036 if (ndp != NULL) 2037 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2038 2039 /* and reclaim all byte range locks */ 2040 lp = LIST_FIRST(&op->nfso_lock); 2041 while (lp != NULL) { 2042 nlp = LIST_NEXT(lp, nfsl_list); 2043 lp->nfsl_seqid = 0; 2044 firstlock = 1; 2045 lop = LIST_FIRST(&lp->nfsl_lock); 2046 while (lop != NULL) { 2047 nlop = LIST_NEXT(lop, nfslo_list); 2048 if (lop->nfslo_end == NFS64BITSSET) 2049 len = NFS64BITSSET; 2050 else 2051 len = lop->nfslo_end - lop->nfslo_first; 2052 error = nfscl_trylock(nmp, NULL, 2053 op->nfso_fh, op->nfso_fhlen, lp, 2054 firstlock, 1, lop->nfslo_first, len, 2055 lop->nfslo_type, tcred, p); 2056 if (error != 0) 2057 nfscl_freelock(lop, 0); 2058 else 2059 firstlock = 0; 2060 lop = nlop; 2061 } 2062 /* If no locks, but a lockowner, just delete it. */ 2063 if (LIST_EMPTY(&lp->nfsl_lock)) 2064 nfscl_freelockowner(lp, 0); 2065 lp = nlp; 2066 } 2067 } 2068 } 2069 if (error != 0 && error != NFSERR_BADSESSION) 2070 nfscl_freeopen(op, 0); 2071 op = nop; 2072 } 2073 owp = nowp; 2074 } 2075 2076 /* 2077 * Now, try and get any delegations not yet reclaimed by cobbling 2078 * to-gether an appropriate open. 2079 */ 2080 nowp = NULL; 2081 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2082 while (dp != NULL) { 2083 ndp = TAILQ_NEXT(dp, nfsdl_list); 2084 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2085 if (nowp == NULL) { 2086 MALLOC(nowp, struct nfsclowner *, 2087 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2088 /* 2089 * Name must be as long an largest possible 2090 * NFSV4CL_LOCKNAMELEN. 12 for now. 2091 */ 2092 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2093 NFSV4CL_LOCKNAMELEN); 2094 LIST_INIT(&nowp->nfsow_open); 2095 nowp->nfsow_clp = clp; 2096 nowp->nfsow_seqid = 0; 2097 nowp->nfsow_defunct = 0; 2098 nfscl_lockinit(&nowp->nfsow_rwlock); 2099 } 2100 nop = NULL; 2101 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2102 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 2103 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2104 nop->nfso_own = nowp; 2105 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2106 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2107 delegtype = NFSV4OPEN_DELEGATEWRITE; 2108 } else { 2109 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2110 delegtype = NFSV4OPEN_DELEGATEREAD; 2111 } 2112 nop->nfso_opencnt = 0; 2113 nop->nfso_posixlock = 1; 2114 nop->nfso_fhlen = dp->nfsdl_fhlen; 2115 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2116 LIST_INIT(&nop->nfso_lock); 2117 nop->nfso_stateid.seqid = 0; 2118 nop->nfso_stateid.other[0] = 0; 2119 nop->nfso_stateid.other[1] = 0; 2120 nop->nfso_stateid.other[2] = 0; 2121 newnfs_copycred(&dp->nfsdl_cred, tcred); 2122 newnfs_copyincred(tcred, &nop->nfso_cred); 2123 tdp = NULL; 2124 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2125 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2126 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2127 delegtype, tcred, p); 2128 if (tdp != NULL) { 2129 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2130 mode = NFSV4OPEN_ACCESSWRITE; 2131 else 2132 mode = NFSV4OPEN_ACCESSREAD; 2133 if ((nop->nfso_mode & mode) == mode && 2134 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2135 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2136 nop->nfso_fhlen)) { 2137 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2138 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2139 dp->nfsdl_ace = tdp->nfsdl_ace; 2140 dp->nfsdl_change = tdp->nfsdl_change; 2141 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2142 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2143 dp->nfsdl_flags |= NFSCLDL_RECALL; 2144 FREE((caddr_t)tdp, M_NFSCLDELEG); 2145 } else { 2146 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2147 } 2148 } 2149 } 2150 if (error) { 2151 if (nop != NULL) 2152 FREE((caddr_t)nop, M_NFSCLOPEN); 2153 /* 2154 * Couldn't reclaim it, so throw the state 2155 * away. Ouch!! 2156 */ 2157 nfscl_cleandeleg(dp); 2158 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2159 } else { 2160 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2161 } 2162 } 2163 dp = ndp; 2164 } 2165 2166 /* 2167 * Now, get rid of extra Opens and Delegations. 2168 */ 2169 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2170 do { 2171 newnfs_copycred(&op->nfso_cred, tcred); 2172 error = nfscl_tryclose(op, tcred, nmp, p); 2173 if (error == NFSERR_GRACE) 2174 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2175 } while (error == NFSERR_GRACE); 2176 LIST_REMOVE(op, nfso_list); 2177 FREE((caddr_t)op, M_NFSCLOPEN); 2178 } 2179 if (nowp != NULL) 2180 FREE((caddr_t)nowp, M_NFSCLOWNER); 2181 2182 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2183 do { 2184 newnfs_copycred(&dp->nfsdl_cred, tcred); 2185 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2186 if (error == NFSERR_GRACE) 2187 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2188 } while (error == NFSERR_GRACE); 2189 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2190 FREE((caddr_t)dp, M_NFSCLDELEG); 2191 } 2192 2193 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2194 if (NFSHASNFSV4N(nmp)) 2195 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2196 2197 NFSLOCKCLSTATE(); 2198 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2199 wakeup(&clp->nfsc_flags); 2200 nfsv4_unlock(&clp->nfsc_lock, 0); 2201 NFSUNLOCKCLSTATE(); 2202 NFSFREECRED(tcred); 2203} 2204 2205/* 2206 * This function is called when a server replies with NFSERR_EXPIRED. 2207 * It deletes all state for the client and does a fresh SetClientId/confirm. 2208 * XXX Someday it should post a signal to the process(es) that hold the 2209 * state, so they know that lock state has been lost. 2210 */ 2211APPLESTATIC int 2212nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2213{ 2214 struct nfsmount *nmp; 2215 struct ucred *cred; 2216 int igotlock = 0, error, trycnt; 2217 2218 /* 2219 * If the clientid has gone away or a new SetClientid has already 2220 * been done, just return ok. 2221 */ 2222 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2223 return (0); 2224 2225 /* 2226 * First, lock the client structure, so everyone else will 2227 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2228 * that only one thread does the work. 2229 */ 2230 NFSLOCKCLSTATE(); 2231 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2232 do { 2233 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2234 NFSCLSTATEMUTEXPTR, NULL); 2235 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2236 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2237 if (igotlock) 2238 nfsv4_unlock(&clp->nfsc_lock, 0); 2239 NFSUNLOCKCLSTATE(); 2240 return (0); 2241 } 2242 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2243 NFSUNLOCKCLSTATE(); 2244 2245 nmp = clp->nfsc_nmp; 2246 if (nmp == NULL) 2247 panic("nfscl expired"); 2248 cred = newnfs_getcred(); 2249 trycnt = 5; 2250 do { 2251 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 2252 } while ((error == NFSERR_STALECLIENTID || 2253 error == NFSERR_BADSESSION || 2254 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2255 if (error) { 2256 NFSLOCKCLSTATE(); 2257 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2258 } else { 2259 /* 2260 * Expire the state for the client. 2261 */ 2262 nfscl_expireclient(clp, nmp, cred, p); 2263 NFSLOCKCLSTATE(); 2264 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2265 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2266 } 2267 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2268 wakeup(&clp->nfsc_flags); 2269 nfsv4_unlock(&clp->nfsc_lock, 0); 2270 NFSUNLOCKCLSTATE(); 2271 NFSFREECRED(cred); 2272 return (error); 2273} 2274 2275/* 2276 * This function inserts a lock in the list after insert_lop. 2277 */ 2278static void 2279nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2280 struct nfscllock *insert_lop, int local) 2281{ 2282 2283 if ((struct nfscllockowner *)insert_lop == lp) 2284 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2285 else 2286 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2287 if (local) 2288 newnfsstats.cllocallocks++; 2289 else 2290 newnfsstats.cllocks++; 2291} 2292 2293/* 2294 * This function updates the locking for a lock owner and given file. It 2295 * maintains a list of lock ranges ordered on increasing file offset that 2296 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2297 * It always adds new_lop to the list and sometimes uses the one pointed 2298 * at by other_lopp. 2299 * Returns 1 if the locks were modified, 0 otherwise. 2300 */ 2301static int 2302nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2303 struct nfscllock **other_lopp, int local) 2304{ 2305 struct nfscllock *new_lop = *new_lopp; 2306 struct nfscllock *lop, *tlop, *ilop; 2307 struct nfscllock *other_lop; 2308 int unlock = 0, modified = 0; 2309 u_int64_t tmp; 2310 2311 /* 2312 * Work down the list until the lock is merged. 2313 */ 2314 if (new_lop->nfslo_type == F_UNLCK) 2315 unlock = 1; 2316 ilop = (struct nfscllock *)lp; 2317 lop = LIST_FIRST(&lp->nfsl_lock); 2318 while (lop != NULL) { 2319 /* 2320 * Only check locks for this file that aren't before the start of 2321 * new lock's range. 2322 */ 2323 if (lop->nfslo_end >= new_lop->nfslo_first) { 2324 if (new_lop->nfslo_end < lop->nfslo_first) { 2325 /* 2326 * If the new lock ends before the start of the 2327 * current lock's range, no merge, just insert 2328 * the new lock. 2329 */ 2330 break; 2331 } 2332 if (new_lop->nfslo_type == lop->nfslo_type || 2333 (new_lop->nfslo_first <= lop->nfslo_first && 2334 new_lop->nfslo_end >= lop->nfslo_end)) { 2335 /* 2336 * This lock can be absorbed by the new lock/unlock. 2337 * This happens when it covers the entire range 2338 * of the old lock or is contiguous 2339 * with the old lock and is of the same type or an 2340 * unlock. 2341 */ 2342 if (new_lop->nfslo_type != lop->nfslo_type || 2343 new_lop->nfslo_first != lop->nfslo_first || 2344 new_lop->nfslo_end != lop->nfslo_end) 2345 modified = 1; 2346 if (lop->nfslo_first < new_lop->nfslo_first) 2347 new_lop->nfslo_first = lop->nfslo_first; 2348 if (lop->nfslo_end > new_lop->nfslo_end) 2349 new_lop->nfslo_end = lop->nfslo_end; 2350 tlop = lop; 2351 lop = LIST_NEXT(lop, nfslo_list); 2352 nfscl_freelock(tlop, local); 2353 continue; 2354 } 2355 2356 /* 2357 * All these cases are for contiguous locks that are not the 2358 * same type, so they can't be merged. 2359 */ 2360 if (new_lop->nfslo_first <= lop->nfslo_first) { 2361 /* 2362 * This case is where the new lock overlaps with the 2363 * first part of the old lock. Move the start of the 2364 * old lock to just past the end of the new lock. The 2365 * new lock will be inserted in front of the old, since 2366 * ilop hasn't been updated. (We are done now.) 2367 */ 2368 if (lop->nfslo_first != new_lop->nfslo_end) { 2369 lop->nfslo_first = new_lop->nfslo_end; 2370 modified = 1; 2371 } 2372 break; 2373 } 2374 if (new_lop->nfslo_end >= lop->nfslo_end) { 2375 /* 2376 * This case is where the new lock overlaps with the 2377 * end of the old lock's range. Move the old lock's 2378 * end to just before the new lock's first and insert 2379 * the new lock after the old lock. 2380 * Might not be done yet, since the new lock could 2381 * overlap further locks with higher ranges. 2382 */ 2383 if (lop->nfslo_end != new_lop->nfslo_first) { 2384 lop->nfslo_end = new_lop->nfslo_first; 2385 modified = 1; 2386 } 2387 ilop = lop; 2388 lop = LIST_NEXT(lop, nfslo_list); 2389 continue; 2390 } 2391 /* 2392 * The final case is where the new lock's range is in the 2393 * middle of the current lock's and splits the current lock 2394 * up. Use *other_lopp to handle the second part of the 2395 * split old lock range. (We are done now.) 2396 * For unlock, we use new_lop as other_lop and tmp, since 2397 * other_lop and new_lop are the same for this case. 2398 * We noted the unlock case above, so we don't need 2399 * new_lop->nfslo_type any longer. 2400 */ 2401 tmp = new_lop->nfslo_first; 2402 if (unlock) { 2403 other_lop = new_lop; 2404 *new_lopp = NULL; 2405 } else { 2406 other_lop = *other_lopp; 2407 *other_lopp = NULL; 2408 } 2409 other_lop->nfslo_first = new_lop->nfslo_end; 2410 other_lop->nfslo_end = lop->nfslo_end; 2411 other_lop->nfslo_type = lop->nfslo_type; 2412 lop->nfslo_end = tmp; 2413 nfscl_insertlock(lp, other_lop, lop, local); 2414 ilop = lop; 2415 modified = 1; 2416 break; 2417 } 2418 ilop = lop; 2419 lop = LIST_NEXT(lop, nfslo_list); 2420 if (lop == NULL) 2421 break; 2422 } 2423 2424 /* 2425 * Insert the new lock in the list at the appropriate place. 2426 */ 2427 if (!unlock) { 2428 nfscl_insertlock(lp, new_lop, ilop, local); 2429 *new_lopp = NULL; 2430 modified = 1; 2431 } 2432 return (modified); 2433} 2434 2435/* 2436 * This function must be run as a kernel thread. 2437 * It does Renew Ops and recovery, when required. 2438 */ 2439APPLESTATIC void 2440nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2441{ 2442 struct nfsclowner *owp, *nowp; 2443 struct nfsclopen *op; 2444 struct nfscllockowner *lp, *nlp; 2445 struct nfscldeleghead dh; 2446 struct nfscldeleg *dp, *ndp; 2447 struct ucred *cred; 2448 u_int32_t clidrev; 2449 int error, cbpathdown, islept, igotlock, ret, clearok; 2450 uint32_t recover_done_time = 0; 2451 time_t mytime; 2452 static time_t prevsec = 0; 2453 struct nfscllockownerfh *lfhp, *nlfhp; 2454 struct nfscllockownerfhhead lfh; 2455 struct nfscllayout *lyp, *nlyp; 2456 struct nfscldevinfo *dip, *ndip; 2457 struct nfscllayouthead rlh; 2458 struct nfsclrecalllayout *recallp; 2459 struct nfsclds *dsp; 2460 2461 cred = newnfs_getcred(); 2462 NFSLOCKCLSTATE(); 2463 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2464 NFSUNLOCKCLSTATE(); 2465 for(;;) { 2466 newnfs_setroot(cred); 2467 cbpathdown = 0; 2468 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2469 /* 2470 * Only allow one recover within 1/2 of the lease 2471 * duration (nfsc_renew). 2472 */ 2473 if (recover_done_time < NFSD_MONOSEC) { 2474 recover_done_time = NFSD_MONOSEC + 2475 clp->nfsc_renew; 2476 NFSCL_DEBUG(1, "Doing recovery..\n"); 2477 nfscl_recover(clp, cred, p); 2478 } else { 2479 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n", 2480 recover_done_time, (intmax_t)NFSD_MONOSEC); 2481 NFSLOCKCLSTATE(); 2482 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2483 NFSUNLOCKCLSTATE(); 2484 } 2485 } 2486 if (clp->nfsc_expire <= NFSD_MONOSEC && 2487 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2488 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2489 clidrev = clp->nfsc_clientidrev; 2490 error = nfsrpc_renew(clp, NULL, cred, p); 2491 if (error == NFSERR_CBPATHDOWN) 2492 cbpathdown = 1; 2493 else if (error == NFSERR_STALECLIENTID || 2494 error == NFSERR_BADSESSION) { 2495 NFSLOCKCLSTATE(); 2496 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2497 NFSUNLOCKCLSTATE(); 2498 } else if (error == NFSERR_EXPIRED) 2499 (void) nfscl_hasexpired(clp, clidrev, p); 2500 } 2501 2502checkdsrenew: 2503 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2504 /* Do renews for any DS sessions. */ 2505 NFSLOCKMNT(clp->nfsc_nmp); 2506 /* Skip first entry, since the MDS is handled above. */ 2507 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2508 if (dsp != NULL) 2509 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2510 while (dsp != NULL) { 2511 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2512 dsp->nfsclds_sess.nfsess_defunct == 0) { 2513 dsp->nfsclds_expire = NFSD_MONOSEC + 2514 clp->nfsc_renew; 2515 NFSUNLOCKMNT(clp->nfsc_nmp); 2516 (void)nfsrpc_renew(clp, dsp, cred, p); 2517 goto checkdsrenew; 2518 } 2519 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2520 } 2521 NFSUNLOCKMNT(clp->nfsc_nmp); 2522 } 2523 2524 TAILQ_INIT(&dh); 2525 NFSLOCKCLSTATE(); 2526 if (cbpathdown) 2527 /* It's a Total Recall! */ 2528 nfscl_totalrecall(clp); 2529 2530 /* 2531 * Now, handle defunct owners. 2532 */ 2533 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2534 if (LIST_EMPTY(&owp->nfsow_open)) { 2535 if (owp->nfsow_defunct != 0) 2536 nfscl_freeopenowner(owp, 0); 2537 } 2538 } 2539 2540 /* 2541 * Do the recall on any delegations. To avoid trouble, always 2542 * come back up here after having slept. 2543 */ 2544 igotlock = 0; 2545tryagain: 2546 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2547 while (dp != NULL) { 2548 ndp = TAILQ_NEXT(dp, nfsdl_list); 2549 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2550 /* 2551 * Wait for outstanding I/O ops to be done. 2552 */ 2553 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2554 if (igotlock) { 2555 nfsv4_unlock(&clp->nfsc_lock, 0); 2556 igotlock = 0; 2557 } 2558 dp->nfsdl_rwlock.nfslock_lock |= 2559 NFSV4LOCK_WANTED; 2560 (void) nfsmsleep(&dp->nfsdl_rwlock, 2561 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2562 NULL); 2563 goto tryagain; 2564 } 2565 while (!igotlock) { 2566 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2567 &islept, NFSCLSTATEMUTEXPTR, NULL); 2568 if (islept) 2569 goto tryagain; 2570 } 2571 NFSUNLOCKCLSTATE(); 2572 newnfs_copycred(&dp->nfsdl_cred, cred); 2573 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2574 NULL, cred, p, 1); 2575 if (!ret) { 2576 nfscl_cleandeleg(dp); 2577 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2578 nfsdl_list); 2579 LIST_REMOVE(dp, nfsdl_hash); 2580 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2581 nfscl_delegcnt--; 2582 newnfsstats.cldelegates--; 2583 } 2584 NFSLOCKCLSTATE(); 2585 } 2586 dp = ndp; 2587 } 2588 2589 /* 2590 * Clear out old delegations, if we are above the high water 2591 * mark. Only clear out ones with no state related to them. 2592 * The tailq list is in LRU order. 2593 */ 2594 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2595 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2596 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2597 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2598 dp->nfsdl_rwlock.nfslock_lock == 0 && 2599 dp->nfsdl_timestamp < NFSD_MONOSEC && 2600 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2601 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2602 clearok = 1; 2603 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2604 op = LIST_FIRST(&owp->nfsow_open); 2605 if (op != NULL) { 2606 clearok = 0; 2607 break; 2608 } 2609 } 2610 if (clearok) { 2611 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2612 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2613 clearok = 0; 2614 break; 2615 } 2616 } 2617 } 2618 if (clearok) { 2619 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2620 LIST_REMOVE(dp, nfsdl_hash); 2621 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2622 nfscl_delegcnt--; 2623 newnfsstats.cldelegates--; 2624 } 2625 } 2626 dp = ndp; 2627 } 2628 if (igotlock) 2629 nfsv4_unlock(&clp->nfsc_lock, 0); 2630 2631 /* 2632 * Do the recall on any layouts. To avoid trouble, always 2633 * come back up here after having slept. 2634 */ 2635 TAILQ_INIT(&rlh); 2636tryagain2: 2637 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2638 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2639 /* 2640 * Wait for outstanding I/O ops to be done. 2641 */ 2642 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2643 (lyp->nfsly_lock.nfslock_lock & 2644 NFSV4LOCK_LOCK) != 0) { 2645 lyp->nfsly_lock.nfslock_lock |= 2646 NFSV4LOCK_WANTED; 2647 (void)nfsmsleep(&lyp->nfsly_lock, 2648 NFSCLSTATEMUTEXPTR, PZERO, "nfslyp", 2649 NULL); 2650 goto tryagain2; 2651 } 2652 /* Move the layout to the recall list. */ 2653 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2654 nfsly_list); 2655 LIST_REMOVE(lyp, nfsly_hash); 2656 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2657 2658 /* Handle any layout commits. */ 2659 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2660 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2661 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2662 NFSUNLOCKCLSTATE(); 2663 NFSCL_DEBUG(3, "do layoutcommit\n"); 2664 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2665 cred, p); 2666 NFSLOCKCLSTATE(); 2667 goto tryagain2; 2668 } 2669 } 2670 } 2671 2672 /* Now, look for stale layouts. */ 2673 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2674 while (lyp != NULL) { 2675 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2676 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2677 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2678 lyp->nfsly_lock.nfslock_usecnt == 0 && 2679 lyp->nfsly_lock.nfslock_lock == 0) { 2680 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2681 nfscl_layoutcnt); 2682 recallp = malloc(sizeof(*recallp), 2683 M_NFSLAYRECALL, M_NOWAIT); 2684 if (recallp == NULL) 2685 break; 2686 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2687 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2688 lyp->nfsly_stateid.seqid, recallp); 2689 } 2690 lyp = nlyp; 2691 } 2692 2693 /* 2694 * Free up any unreferenced device info structures. 2695 */ 2696 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 2697 if (dip->nfsdi_layoutrefs == 0 && 2698 dip->nfsdi_refcnt == 0) { 2699 NFSCL_DEBUG(4, "freeing devinfo\n"); 2700 LIST_REMOVE(dip, nfsdi_list); 2701 nfscl_freedevinfo(dip); 2702 } 2703 } 2704 NFSUNLOCKCLSTATE(); 2705 2706 /* Do layout return(s), as required. */ 2707 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 2708 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 2709 NFSCL_DEBUG(4, "ret layout\n"); 2710 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 2711 nfscl_freelayout(lyp); 2712 } 2713 2714 /* 2715 * Delegreturn any delegations cleaned out or recalled. 2716 */ 2717 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2718 newnfs_copycred(&dp->nfsdl_cred, cred); 2719 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2720 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2721 FREE((caddr_t)dp, M_NFSCLDELEG); 2722 } 2723 2724 SLIST_INIT(&lfh); 2725 /* 2726 * Call nfscl_cleanupkext() once per second to check for 2727 * open/lock owners where the process has exited. 2728 */ 2729 mytime = NFSD_MONOSEC; 2730 if (prevsec != mytime) { 2731 prevsec = mytime; 2732 nfscl_cleanupkext(clp, &lfh); 2733 } 2734 2735 /* 2736 * Do a ReleaseLockOwner for all lock owners where the 2737 * associated process no longer exists, as found by 2738 * nfscl_cleanupkext(). 2739 */ 2740 newnfs_setroot(cred); 2741 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2742 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2743 nlp) { 2744 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2745 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2746 p); 2747 nfscl_freelockowner(lp, 0); 2748 } 2749 free(lfhp, M_TEMP); 2750 } 2751 SLIST_INIT(&lfh); 2752 2753 NFSLOCKCLSTATE(); 2754 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2755 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2756 hz); 2757 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2758 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2759 NFSUNLOCKCLSTATE(); 2760 NFSFREECRED(cred); 2761 wakeup((caddr_t)clp); 2762 return; 2763 } 2764 NFSUNLOCKCLSTATE(); 2765 } 2766} 2767 2768/* 2769 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 2770 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 2771 */ 2772APPLESTATIC void 2773nfscl_initiate_recovery(struct nfsclclient *clp) 2774{ 2775 2776 if (clp == NULL) 2777 return; 2778 NFSLOCKCLSTATE(); 2779 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2780 NFSUNLOCKCLSTATE(); 2781 wakeup((caddr_t)clp); 2782} 2783 2784/* 2785 * Dump out the state stuff for debugging. 2786 */ 2787APPLESTATIC void 2788nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2789 int lockowner, int locks) 2790{ 2791 struct nfsclclient *clp; 2792 struct nfsclowner *owp; 2793 struct nfsclopen *op; 2794 struct nfscllockowner *lp; 2795 struct nfscllock *lop; 2796 struct nfscldeleg *dp; 2797 2798 clp = nmp->nm_clp; 2799 if (clp == NULL) { 2800 printf("nfscl dumpstate NULL clp\n"); 2801 return; 2802 } 2803 NFSLOCKCLSTATE(); 2804 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2805 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2806 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2807 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2808 owp->nfsow_owner[0], owp->nfsow_owner[1], 2809 owp->nfsow_owner[2], owp->nfsow_owner[3], 2810 owp->nfsow_seqid); 2811 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2812 if (opens) 2813 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2814 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2815 op->nfso_stateid.other[2], op->nfso_opencnt, 2816 op->nfso_fh[12]); 2817 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2818 if (lockowner) 2819 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2820 lp->nfsl_owner[0], lp->nfsl_owner[1], 2821 lp->nfsl_owner[2], lp->nfsl_owner[3], 2822 lp->nfsl_seqid, 2823 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2824 lp->nfsl_stateid.other[2]); 2825 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2826 if (locks) 2827#ifdef __FreeBSD__ 2828 printf("lck typ=%d fst=%ju end=%ju\n", 2829 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2830 (intmax_t)lop->nfslo_end); 2831#else 2832 printf("lck typ=%d fst=%qd end=%qd\n", 2833 lop->nfslo_type, lop->nfslo_first, 2834 lop->nfslo_end); 2835#endif 2836 } 2837 } 2838 } 2839 } 2840 } 2841 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2842 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2843 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2844 owp->nfsow_owner[0], owp->nfsow_owner[1], 2845 owp->nfsow_owner[2], owp->nfsow_owner[3], 2846 owp->nfsow_seqid); 2847 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2848 if (opens) 2849 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2850 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2851 op->nfso_stateid.other[2], op->nfso_opencnt, 2852 op->nfso_fh[12]); 2853 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2854 if (lockowner) 2855 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2856 lp->nfsl_owner[0], lp->nfsl_owner[1], 2857 lp->nfsl_owner[2], lp->nfsl_owner[3], 2858 lp->nfsl_seqid, 2859 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2860 lp->nfsl_stateid.other[2]); 2861 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2862 if (locks) 2863#ifdef __FreeBSD__ 2864 printf("lck typ=%d fst=%ju end=%ju\n", 2865 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2866 (intmax_t)lop->nfslo_end); 2867#else 2868 printf("lck typ=%d fst=%qd end=%qd\n", 2869 lop->nfslo_type, lop->nfslo_first, 2870 lop->nfslo_end); 2871#endif 2872 } 2873 } 2874 } 2875 } 2876 NFSUNLOCKCLSTATE(); 2877} 2878 2879/* 2880 * Check for duplicate open owners and opens. 2881 * (Only used as a diagnostic aid.) 2882 */ 2883APPLESTATIC void 2884nfscl_dupopen(vnode_t vp, int dupopens) 2885{ 2886 struct nfsclclient *clp; 2887 struct nfsclowner *owp, *owp2; 2888 struct nfsclopen *op, *op2; 2889 struct nfsfh *nfhp; 2890 2891 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2892 if (clp == NULL) { 2893 printf("nfscl dupopen NULL clp\n"); 2894 return; 2895 } 2896 nfhp = VTONFS(vp)->n_fhp; 2897 NFSLOCKCLSTATE(); 2898 2899 /* 2900 * First, search for duplicate owners. 2901 * These should never happen! 2902 */ 2903 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2904 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2905 if (owp != owp2 && 2906 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2907 NFSV4CL_LOCKNAMELEN)) { 2908 NFSUNLOCKCLSTATE(); 2909 printf("DUP OWNER\n"); 2910 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2911 return; 2912 } 2913 } 2914 } 2915 2916 /* 2917 * Now, search for duplicate stateids. 2918 * These shouldn't happen, either. 2919 */ 2920 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2921 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2922 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2923 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2924 if (op != op2 && 2925 (op->nfso_stateid.other[0] != 0 || 2926 op->nfso_stateid.other[1] != 0 || 2927 op->nfso_stateid.other[2] != 0) && 2928 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 2929 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 2930 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 2931 NFSUNLOCKCLSTATE(); 2932 printf("DUP STATEID\n"); 2933 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 2934 0); 2935 return; 2936 } 2937 } 2938 } 2939 } 2940 } 2941 2942 /* 2943 * Now search for duplicate opens. 2944 * Duplicate opens for the same owner 2945 * should never occur. Other duplicates are 2946 * possible and are checked for if "dupopens" 2947 * is true. 2948 */ 2949 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2950 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2951 if (nfhp->nfh_len == op2->nfso_fhlen && 2952 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 2953 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2954 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2955 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 2956 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 2957 (!NFSBCMP(op->nfso_own->nfsow_owner, 2958 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 2959 dupopens)) { 2960 if (!NFSBCMP(op->nfso_own->nfsow_owner, 2961 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 2962 NFSUNLOCKCLSTATE(); 2963 printf("BADDUP OPEN\n"); 2964 } else { 2965 NFSUNLOCKCLSTATE(); 2966 printf("DUP OPEN\n"); 2967 } 2968 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 2969 0, 0); 2970 return; 2971 } 2972 } 2973 } 2974 } 2975 } 2976 } 2977 NFSUNLOCKCLSTATE(); 2978} 2979 2980/* 2981 * During close, find an open that needs to be dereferenced and 2982 * dereference it. If there are no more opens for this file, 2983 * log a message to that effect. 2984 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 2985 * on the file's vnode. 2986 * This is the safe way, since it is difficult to identify 2987 * which open the close is for and I/O can be performed after the 2988 * close(2) system call when a file is mmap'd. 2989 * If it returns 0 for success, there will be a referenced 2990 * clp returned via clpp. 2991 */ 2992APPLESTATIC int 2993nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 2994{ 2995 struct nfsclclient *clp; 2996 struct nfsclowner *owp; 2997 struct nfsclopen *op; 2998 struct nfscldeleg *dp; 2999 struct nfsfh *nfhp; 3000 int error, notdecr; 3001 3002 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3003 if (error) 3004 return (error); 3005 *clpp = clp; 3006 3007 nfhp = VTONFS(vp)->n_fhp; 3008 notdecr = 1; 3009 NFSLOCKCLSTATE(); 3010 /* 3011 * First, look for one under a delegation that was locally issued 3012 * and just decrement the opencnt for it. Since all my Opens against 3013 * the server are DENY_NONE, I don't see a problem with hanging 3014 * onto them. (It is much easier to use one of the extant Opens 3015 * that I already have on the server when a Delegation is recalled 3016 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3017 */ 3018 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3019 if (dp != NULL) { 3020 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3021 op = LIST_FIRST(&owp->nfsow_open); 3022 if (op != NULL) { 3023 /* 3024 * Since a delegation is for a file, there 3025 * should never be more than one open for 3026 * each openowner. 3027 */ 3028 if (LIST_NEXT(op, nfso_list) != NULL) 3029 panic("nfscdeleg opens"); 3030 if (notdecr && op->nfso_opencnt > 0) { 3031 notdecr = 0; 3032 op->nfso_opencnt--; 3033 break; 3034 } 3035 } 3036 } 3037 } 3038 3039 /* Now process the opens against the server. */ 3040 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3041 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3042 if (op->nfso_fhlen == nfhp->nfh_len && 3043 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3044 nfhp->nfh_len)) { 3045 /* Found an open, decrement cnt if possible */ 3046 if (notdecr && op->nfso_opencnt > 0) { 3047 notdecr = 0; 3048 op->nfso_opencnt--; 3049 } 3050 /* 3051 * There are more opens, so just return. 3052 */ 3053 if (op->nfso_opencnt > 0) { 3054 NFSUNLOCKCLSTATE(); 3055 return (0); 3056 } 3057 } 3058 } 3059 } 3060 NFSUNLOCKCLSTATE(); 3061 if (notdecr) 3062 printf("nfscl: never fnd open\n"); 3063 return (0); 3064} 3065 3066APPLESTATIC int 3067nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3068{ 3069 struct nfsclclient *clp; 3070 struct nfsclowner *owp, *nowp; 3071 struct nfsclopen *op; 3072 struct nfscldeleg *dp; 3073 struct nfsfh *nfhp; 3074 int error; 3075 3076 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3077 if (error) 3078 return (error); 3079 *clpp = clp; 3080 3081 nfhp = VTONFS(vp)->n_fhp; 3082 NFSLOCKCLSTATE(); 3083 /* 3084 * First get rid of the local Open structures, which should be no 3085 * longer in use. 3086 */ 3087 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3088 if (dp != NULL) { 3089 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3090 op = LIST_FIRST(&owp->nfsow_open); 3091 if (op != NULL) { 3092 KASSERT((op->nfso_opencnt == 0), 3093 ("nfscl: bad open cnt on deleg")); 3094 nfscl_freeopen(op, 1); 3095 } 3096 nfscl_freeopenowner(owp, 1); 3097 } 3098 } 3099 3100 /* Return any layouts marked return on close. */ 3101 nfscl_retoncloselayout(clp, nfhp->nfh_fh, nfhp->nfh_len); 3102 3103 /* Now process the opens against the server. */ 3104lookformore: 3105 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3106 op = LIST_FIRST(&owp->nfsow_open); 3107 while (op != NULL) { 3108 if (op->nfso_fhlen == nfhp->nfh_len && 3109 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3110 nfhp->nfh_len)) { 3111 /* Found an open, close it. */ 3112 KASSERT((op->nfso_opencnt == 0), 3113 ("nfscl: bad open cnt on server")); 3114 NFSUNLOCKCLSTATE(); 3115 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 3116 p); 3117 NFSLOCKCLSTATE(); 3118 goto lookformore; 3119 } 3120 op = LIST_NEXT(op, nfso_list); 3121 } 3122 } 3123 NFSUNLOCKCLSTATE(); 3124 return (0); 3125} 3126 3127/* 3128 * Return all delegations on this client. 3129 * (Must be called with client sleep lock.) 3130 */ 3131static void 3132nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3133{ 3134 struct nfscldeleg *dp, *ndp; 3135 struct ucred *cred; 3136 3137 cred = newnfs_getcred(); 3138 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3139 nfscl_cleandeleg(dp); 3140 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3141 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3142 } 3143 NFSFREECRED(cred); 3144} 3145 3146/* 3147 * Do a callback RPC. 3148 */ 3149APPLESTATIC void 3150nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3151{ 3152 int clist, gotseq_ok, i, j, k, op, rcalls; 3153 u_int32_t *tl; 3154 struct nfsclclient *clp; 3155 struct nfscldeleg *dp = NULL; 3156 int numops, taglen = -1, error = 0, trunc; 3157 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3158 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3159 vnode_t vp = NULL; 3160 struct nfsnode *np; 3161 struct vattr va; 3162 struct nfsfh *nfhp; 3163 mount_t mp; 3164 nfsattrbit_t attrbits, rattrbits; 3165 nfsv4stateid_t stateid; 3166 uint32_t seqid, slotid = 0, highslot, cachethis; 3167 uint8_t sessionid[NFSX_V4SESSIONID]; 3168 struct mbuf *rep; 3169 struct nfscllayout *lyp; 3170 uint64_t filesid[2], len, off; 3171 int changed, gotone, laytype, recalltype; 3172 uint32_t iomode; 3173 struct nfsclrecalllayout *recallp = NULL; 3174 struct nfsclsession *tsep; 3175 3176 gotseq_ok = 0; 3177 nfsrvd_rephead(nd); 3178 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3179 taglen = fxdr_unsigned(int, *tl); 3180 if (taglen < 0) { 3181 error = EBADRPC; 3182 goto nfsmout; 3183 } 3184 if (taglen <= NFSV4_SMALLSTR) 3185 tagstr = tag; 3186 else 3187 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3188 error = nfsrv_mtostr(nd, tagstr, taglen); 3189 if (error) { 3190 if (taglen > NFSV4_SMALLSTR) 3191 free(tagstr, M_TEMP); 3192 taglen = -1; 3193 goto nfsmout; 3194 } 3195 (void) nfsm_strtom(nd, tag, taglen); 3196 if (taglen > NFSV4_SMALLSTR) { 3197 free(tagstr, M_TEMP); 3198 } 3199 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3200 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3201 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3202 if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION) 3203 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3204 cbident = fxdr_unsigned(u_int32_t, *tl++); 3205 if (nd->nd_repstat) 3206 numops = 0; 3207 else 3208 numops = fxdr_unsigned(int, *tl); 3209 /* 3210 * Loop around doing the sub ops. 3211 */ 3212 for (i = 0; i < numops; i++) { 3213 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3214 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3215 *repp++ = *tl; 3216 op = fxdr_unsigned(int, *tl); 3217 if (op < NFSV4OP_CBGETATTR || 3218 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3219 (op > NFSV4OP_CBNOTIFYDEVID && 3220 minorvers == NFSV41_MINORVERSION)) { 3221 nd->nd_repstat = NFSERR_OPILLEGAL; 3222 *repp = nfscl_errmap(nd, minorvers); 3223 retops++; 3224 break; 3225 } 3226 nd->nd_procnum = op; 3227 if (op < NFSV4OP_CBNOPS) 3228 newnfsstats.cbrpccnt[nd->nd_procnum]++; 3229 switch (op) { 3230 case NFSV4OP_CBGETATTR: 3231 NFSCL_DEBUG(4, "cbgetattr\n"); 3232 mp = NULL; 3233 vp = NULL; 3234 error = nfsm_getfh(nd, &nfhp); 3235 if (!error) 3236 error = nfsrv_getattrbits(nd, &attrbits, 3237 NULL, NULL); 3238 if (error == 0 && i == 0 && 3239 minorvers != NFSV4_MINORVERSION) 3240 error = NFSERR_OPNOTINSESS; 3241 if (!error) { 3242 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3243 &clp); 3244 if (mp == NULL) 3245 error = NFSERR_SERVERFAULT; 3246 } 3247 if (!error) { 3248 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3249 nfhp->nfh_len, p, &np); 3250 if (!error) 3251 vp = NFSTOV(np); 3252 } 3253 if (!error) { 3254 NFSZERO_ATTRBIT(&rattrbits); 3255 NFSLOCKCLSTATE(); 3256 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3257 nfhp->nfh_len); 3258 if (dp != NULL) { 3259 if (NFSISSET_ATTRBIT(&attrbits, 3260 NFSATTRBIT_SIZE)) { 3261 if (vp != NULL) 3262 va.va_size = np->n_size; 3263 else 3264 va.va_size = 3265 dp->nfsdl_size; 3266 NFSSETBIT_ATTRBIT(&rattrbits, 3267 NFSATTRBIT_SIZE); 3268 } 3269 if (NFSISSET_ATTRBIT(&attrbits, 3270 NFSATTRBIT_CHANGE)) { 3271 va.va_filerev = 3272 dp->nfsdl_change; 3273 if (vp == NULL || 3274 (np->n_flag & NDELEGMOD)) 3275 va.va_filerev++; 3276 NFSSETBIT_ATTRBIT(&rattrbits, 3277 NFSATTRBIT_CHANGE); 3278 } 3279 } else 3280 error = NFSERR_SERVERFAULT; 3281 NFSUNLOCKCLSTATE(); 3282 } 3283 if (vp != NULL) 3284 vrele(vp); 3285 if (mp != NULL) 3286 vfs_unbusy(mp); 3287 if (nfhp != NULL) 3288 FREE((caddr_t)nfhp, M_NFSFH); 3289 if (!error) 3290 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3291 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3292 (uint64_t)0); 3293 break; 3294 case NFSV4OP_CBRECALL: 3295 NFSCL_DEBUG(4, "cbrecall\n"); 3296 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3297 NFSX_UNSIGNED); 3298 stateid.seqid = *tl++; 3299 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3300 NFSX_STATEIDOTHER); 3301 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3302 trunc = fxdr_unsigned(int, *tl); 3303 error = nfsm_getfh(nd, &nfhp); 3304 if (error == 0 && i == 0 && 3305 minorvers != NFSV4_MINORVERSION) 3306 error = NFSERR_OPNOTINSESS; 3307 if (!error) { 3308 NFSLOCKCLSTATE(); 3309 if (minorvers == NFSV4_MINORVERSION) 3310 clp = nfscl_getclnt(cbident); 3311 else 3312 clp = nfscl_getclntsess(sessionid); 3313 if (clp != NULL) { 3314 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3315 nfhp->nfh_len); 3316 if (dp != NULL && (dp->nfsdl_flags & 3317 NFSCLDL_DELEGRET) == 0) { 3318 dp->nfsdl_flags |= 3319 NFSCLDL_RECALL; 3320 wakeup((caddr_t)clp); 3321 } 3322 } else { 3323 error = NFSERR_SERVERFAULT; 3324 } 3325 NFSUNLOCKCLSTATE(); 3326 } 3327 if (nfhp != NULL) 3328 FREE((caddr_t)nfhp, M_NFSFH); 3329 break; 3330 case NFSV4OP_CBLAYOUTRECALL: 3331 NFSCL_DEBUG(4, "cblayrec\n"); 3332 nfhp = NULL; 3333 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3334 laytype = fxdr_unsigned(int, *tl++); 3335 iomode = fxdr_unsigned(uint32_t, *tl++); 3336 if (newnfs_true == *tl++) 3337 changed = 1; 3338 else 3339 changed = 0; 3340 recalltype = fxdr_unsigned(int, *tl); 3341 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3342 M_WAITOK); 3343 if (laytype != NFSLAYOUT_NFSV4_1_FILES) 3344 error = NFSERR_NOMATCHLAYOUT; 3345 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3346 error = nfsm_getfh(nd, &nfhp); 3347 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3348 if (error != 0) 3349 goto nfsmout; 3350 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3351 NFSX_STATEID); 3352 off = fxdr_hyper(tl); tl += 2; 3353 len = fxdr_hyper(tl); tl += 2; 3354 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3355 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3356 if (minorvers == NFSV4_MINORVERSION) 3357 error = NFSERR_NOTSUPP; 3358 else if (i == 0) 3359 error = NFSERR_OPNOTINSESS; 3360 if (error == 0) { 3361 NFSLOCKCLSTATE(); 3362 clp = nfscl_getclntsess(sessionid); 3363 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3364 if (clp != NULL) { 3365 lyp = nfscl_findlayout(clp, 3366 nfhp->nfh_fh, 3367 nfhp->nfh_len); 3368 NFSCL_DEBUG(4, "cblyp=%p\n", 3369 lyp); 3370 if (lyp != NULL && 3371 (lyp->nfsly_flags & 3372 NFSLY_FILES) != 0 && 3373 !NFSBCMP(stateid.other, 3374 lyp->nfsly_stateid.other, 3375 NFSX_STATEIDOTHER)) { 3376 error = 3377 nfscl_layoutrecall( 3378 recalltype, 3379 lyp, iomode, off, 3380 len, stateid.seqid, 3381 recallp); 3382 recallp = NULL; 3383 wakeup(clp); 3384 NFSCL_DEBUG(4, 3385 "aft layrcal=%d\n", 3386 error); 3387 } else 3388 error = 3389 NFSERR_NOMATCHLAYOUT; 3390 } else 3391 error = NFSERR_NOMATCHLAYOUT; 3392 NFSUNLOCKCLSTATE(); 3393 } 3394 free(nfhp, M_NFSFH); 3395 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3396 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3397 filesid[0] = fxdr_hyper(tl); tl += 2; 3398 filesid[1] = fxdr_hyper(tl); tl += 2; 3399 gotone = 0; 3400 NFSLOCKCLSTATE(); 3401 clp = nfscl_getclntsess(sessionid); 3402 if (clp != NULL) { 3403 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3404 nfsly_list) { 3405 if (lyp->nfsly_filesid[0] == 3406 filesid[0] && 3407 lyp->nfsly_filesid[1] == 3408 filesid[1]) { 3409 error = 3410 nfscl_layoutrecall( 3411 recalltype, 3412 lyp, iomode, 0, 3413 UINT64_MAX, 3414 lyp->nfsly_stateid.seqid, 3415 recallp); 3416 recallp = NULL; 3417 gotone = 1; 3418 } 3419 } 3420 if (gotone != 0) 3421 wakeup(clp); 3422 else 3423 error = NFSERR_NOMATCHLAYOUT; 3424 } else 3425 error = NFSERR_NOMATCHLAYOUT; 3426 NFSUNLOCKCLSTATE(); 3427 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3428 gotone = 0; 3429 NFSLOCKCLSTATE(); 3430 clp = nfscl_getclntsess(sessionid); 3431 if (clp != NULL) { 3432 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3433 nfsly_list) { 3434 error = nfscl_layoutrecall( 3435 recalltype, lyp, iomode, 0, 3436 UINT64_MAX, 3437 lyp->nfsly_stateid.seqid, 3438 recallp); 3439 recallp = NULL; 3440 gotone = 1; 3441 } 3442 if (gotone != 0) 3443 wakeup(clp); 3444 else 3445 error = NFSERR_NOMATCHLAYOUT; 3446 } else 3447 error = NFSERR_NOMATCHLAYOUT; 3448 NFSUNLOCKCLSTATE(); 3449 } else 3450 error = NFSERR_NOMATCHLAYOUT; 3451 if (recallp != NULL) { 3452 free(recallp, M_NFSLAYRECALL); 3453 recallp = NULL; 3454 } 3455 break; 3456 case NFSV4OP_CBSEQUENCE: 3457 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3458 5 * NFSX_UNSIGNED); 3459 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3460 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3461 seqid = fxdr_unsigned(uint32_t, *tl++); 3462 slotid = fxdr_unsigned(uint32_t, *tl++); 3463 highslot = fxdr_unsigned(uint32_t, *tl++); 3464 cachethis = *tl++; 3465 /* Throw away the referring call stuff. */ 3466 clist = fxdr_unsigned(int, *tl); 3467 for (j = 0; j < clist; j++) { 3468 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3469 NFSX_UNSIGNED); 3470 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3471 rcalls = fxdr_unsigned(int, *tl); 3472 for (k = 0; k < rcalls; k++) { 3473 NFSM_DISSECT(tl, uint32_t *, 3474 2 * NFSX_UNSIGNED); 3475 } 3476 } 3477 NFSLOCKCLSTATE(); 3478 if (i == 0) { 3479 clp = nfscl_getclntsess(sessionid); 3480 if (clp == NULL) 3481 error = NFSERR_SERVERFAULT; 3482 } else 3483 error = NFSERR_SEQUENCEPOS; 3484 if (error == 0) { 3485 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3486 error = nfsv4_seqsession(seqid, slotid, 3487 highslot, tsep->nfsess_cbslots, &rep, 3488 tsep->nfsess_backslots); 3489 } 3490 NFSUNLOCKCLSTATE(); 3491 if (error == 0) { 3492 gotseq_ok = 1; 3493 if (rep != NULL) { 3494 NFSCL_DEBUG(4, "Got cbretry\n"); 3495 m_freem(nd->nd_mreq); 3496 nd->nd_mreq = rep; 3497 rep = NULL; 3498 goto out; 3499 } 3500 NFSM_BUILD(tl, uint32_t *, 3501 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3502 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3503 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3504 *tl++ = txdr_unsigned(seqid); 3505 *tl++ = txdr_unsigned(slotid); 3506 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3507 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3508 } 3509 break; 3510 default: 3511 if (i == 0 && minorvers == NFSV41_MINORVERSION) 3512 error = NFSERR_OPNOTINSESS; 3513 else { 3514 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3515 error = NFSERR_NOTSUPP; 3516 } 3517 break; 3518 }; 3519 if (error) { 3520 if (error == EBADRPC || error == NFSERR_BADXDR) { 3521 nd->nd_repstat = NFSERR_BADXDR; 3522 } else { 3523 nd->nd_repstat = error; 3524 } 3525 error = 0; 3526 } 3527 retops++; 3528 if (nd->nd_repstat) { 3529 *repp = nfscl_errmap(nd, minorvers); 3530 break; 3531 } else 3532 *repp = 0; /* NFS4_OK */ 3533 } 3534nfsmout: 3535 if (recallp != NULL) 3536 free(recallp, M_NFSLAYRECALL); 3537 if (error) { 3538 if (error == EBADRPC || error == NFSERR_BADXDR) 3539 nd->nd_repstat = NFSERR_BADXDR; 3540 else 3541 printf("nfsv4 comperr1=%d\n", error); 3542 } 3543 if (taglen == -1) { 3544 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3545 *tl++ = 0; 3546 *tl = 0; 3547 } else { 3548 *retopsp = txdr_unsigned(retops); 3549 } 3550 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3551out: 3552 if (gotseq_ok != 0) { 3553 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3554 NFSLOCKCLSTATE(); 3555 clp = nfscl_getclntsess(sessionid); 3556 if (clp != NULL) { 3557 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3558 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3559 NFSERR_OK, &rep); 3560 NFSUNLOCKCLSTATE(); 3561 } else { 3562 NFSUNLOCKCLSTATE(); 3563 m_freem(rep); 3564 } 3565 } 3566} 3567 3568/* 3569 * Generate the next cbident value. Basically just increment a static value 3570 * and then check that it isn't already in the list, if it has wrapped around. 3571 */ 3572static u_int32_t 3573nfscl_nextcbident(void) 3574{ 3575 struct nfsclclient *clp; 3576 int matched; 3577 static u_int32_t nextcbident = 0; 3578 static int haswrapped = 0; 3579 3580 nextcbident++; 3581 if (nextcbident == 0) 3582 haswrapped = 1; 3583 if (haswrapped) { 3584 /* 3585 * Search the clientid list for one already using this cbident. 3586 */ 3587 do { 3588 matched = 0; 3589 NFSLOCKCLSTATE(); 3590 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3591 if (clp->nfsc_cbident == nextcbident) { 3592 matched = 1; 3593 break; 3594 } 3595 } 3596 NFSUNLOCKCLSTATE(); 3597 if (matched == 1) 3598 nextcbident++; 3599 } while (matched); 3600 } 3601 return (nextcbident); 3602} 3603 3604/* 3605 * Get the mount point related to a given cbident or session and busy it. 3606 */ 3607static mount_t 3608nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3609 struct nfsclclient **clpp) 3610{ 3611 struct nfsclclient *clp; 3612 mount_t mp; 3613 int error; 3614 struct nfsclsession *tsep; 3615 3616 *clpp = NULL; 3617 NFSLOCKCLSTATE(); 3618 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3619 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3620 if (minorvers == NFSV4_MINORVERSION) { 3621 if (clp->nfsc_cbident == cbident) 3622 break; 3623 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3624 NFSX_V4SESSIONID)) 3625 break; 3626 } 3627 if (clp == NULL) { 3628 NFSUNLOCKCLSTATE(); 3629 return (NULL); 3630 } 3631 mp = clp->nfsc_nmp->nm_mountp; 3632 vfs_ref(mp); 3633 NFSUNLOCKCLSTATE(); 3634 error = vfs_busy(mp, 0); 3635 vfs_rel(mp); 3636 if (error != 0) 3637 return (NULL); 3638 *clpp = clp; 3639 return (mp); 3640} 3641 3642/* 3643 * Get the clientid pointer related to a given cbident. 3644 */ 3645static struct nfsclclient * 3646nfscl_getclnt(u_int32_t cbident) 3647{ 3648 struct nfsclclient *clp; 3649 3650 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3651 if (clp->nfsc_cbident == cbident) 3652 break; 3653 return (clp); 3654} 3655 3656/* 3657 * Get the clientid pointer related to a given sessionid. 3658 */ 3659static struct nfsclclient * 3660nfscl_getclntsess(uint8_t *sessionid) 3661{ 3662 struct nfsclclient *clp; 3663 struct nfsclsession *tsep; 3664 3665 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3666 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3667 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3668 NFSX_V4SESSIONID)) 3669 break; 3670 } 3671 return (clp); 3672} 3673 3674/* 3675 * Search for a lock conflict locally on the client. A conflict occurs if 3676 * - not same owner and overlapping byte range and at least one of them is 3677 * a write lock or this is an unlock. 3678 */ 3679static int 3680nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3681 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3682 struct nfscllock **lopp) 3683{ 3684 struct nfsclowner *owp; 3685 struct nfsclopen *op; 3686 int ret; 3687 3688 if (dp != NULL) { 3689 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3690 if (ret) 3691 return (ret); 3692 } 3693 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3694 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3695 if (op->nfso_fhlen == fhlen && 3696 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3697 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3698 own, lopp); 3699 if (ret) 3700 return (ret); 3701 } 3702 } 3703 } 3704 return (0); 3705} 3706 3707static int 3708nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3709 u_int8_t *own, struct nfscllock **lopp) 3710{ 3711 struct nfscllockowner *lp; 3712 struct nfscllock *lop; 3713 3714 LIST_FOREACH(lp, lhp, nfsl_list) { 3715 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3716 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3717 if (lop->nfslo_first >= nlop->nfslo_end) 3718 break; 3719 if (lop->nfslo_end <= nlop->nfslo_first) 3720 continue; 3721 if (lop->nfslo_type == F_WRLCK || 3722 nlop->nfslo_type == F_WRLCK || 3723 nlop->nfslo_type == F_UNLCK) { 3724 if (lopp != NULL) 3725 *lopp = lop; 3726 return (NFSERR_DENIED); 3727 } 3728 } 3729 } 3730 } 3731 return (0); 3732} 3733 3734/* 3735 * Check for a local conflicting lock. 3736 */ 3737APPLESTATIC int 3738nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3739 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3740{ 3741 struct nfscllock *lop, nlck; 3742 struct nfscldeleg *dp; 3743 struct nfsnode *np; 3744 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3745 int error; 3746 3747 nlck.nfslo_type = fl->l_type; 3748 nlck.nfslo_first = off; 3749 if (len == NFS64BITSSET) { 3750 nlck.nfslo_end = NFS64BITSSET; 3751 } else { 3752 nlck.nfslo_end = off + len; 3753 if (nlck.nfslo_end <= nlck.nfslo_first) 3754 return (NFSERR_INVAL); 3755 } 3756 np = VTONFS(vp); 3757 nfscl_filllockowner(id, own, flags); 3758 NFSLOCKCLSTATE(); 3759 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3760 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3761 &nlck, own, dp, &lop); 3762 if (error != 0) { 3763 fl->l_whence = SEEK_SET; 3764 fl->l_start = lop->nfslo_first; 3765 if (lop->nfslo_end == NFS64BITSSET) 3766 fl->l_len = 0; 3767 else 3768 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3769 fl->l_pid = (pid_t)0; 3770 fl->l_type = lop->nfslo_type; 3771 error = -1; /* no RPC required */ 3772 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3773 fl->l_type == F_RDLCK)) { 3774 /* 3775 * The delegation ensures that there isn't a conflicting 3776 * lock on the server, so return -1 to indicate an RPC 3777 * isn't required. 3778 */ 3779 fl->l_type = F_UNLCK; 3780 error = -1; 3781 } 3782 NFSUNLOCKCLSTATE(); 3783 return (error); 3784} 3785 3786/* 3787 * Handle Recall of a delegation. 3788 * The clp must be exclusive locked when this is called. 3789 */ 3790static int 3791nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3792 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3793 int called_from_renewthread) 3794{ 3795 struct nfsclowner *owp, *lowp, *nowp; 3796 struct nfsclopen *op, *lop; 3797 struct nfscllockowner *lp; 3798 struct nfscllock *lckp; 3799 struct nfsnode *np; 3800 int error = 0, ret, gotvp = 0; 3801 3802 if (vp == NULL) { 3803 /* 3804 * First, get a vnode for the file. This is needed to do RPCs. 3805 */ 3806 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3807 dp->nfsdl_fhlen, p, &np); 3808 if (ret) { 3809 /* 3810 * File isn't open, so nothing to move over to the 3811 * server. 3812 */ 3813 return (0); 3814 } 3815 vp = NFSTOV(np); 3816 gotvp = 1; 3817 } else { 3818 np = VTONFS(vp); 3819 } 3820 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3821 3822 /* 3823 * Ok, if it's a write delegation, flush data to the server, so 3824 * that close/open consistency is retained. 3825 */ 3826 ret = 0; 3827 NFSLOCKNODE(np); 3828 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3829 np->n_flag |= NDELEGRECALL; 3830 NFSUNLOCKNODE(np); 3831 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1, 3832 called_from_renewthread); 3833 NFSLOCKNODE(np); 3834 np->n_flag &= ~NDELEGRECALL; 3835 } 3836 NFSINVALATTRCACHE(np); 3837 NFSUNLOCKNODE(np); 3838 if (ret == EIO && called_from_renewthread != 0) { 3839 /* 3840 * If the flush failed with EIO for the renew thread, 3841 * return now, so that the dirty buffer will be flushed 3842 * later. 3843 */ 3844 if (gotvp != 0) 3845 vrele(vp); 3846 return (ret); 3847 } 3848 3849 /* 3850 * Now, for each openowner with opens issued locally, move them 3851 * over to state against the server. 3852 */ 3853 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3854 lop = LIST_FIRST(&lowp->nfsow_open); 3855 if (lop != NULL) { 3856 if (LIST_NEXT(lop, nfso_list) != NULL) 3857 panic("nfsdlg mult opens"); 3858 /* 3859 * Look for the same openowner against the server. 3860 */ 3861 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3862 if (!NFSBCMP(lowp->nfsow_owner, 3863 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3864 newnfs_copycred(&dp->nfsdl_cred, cred); 3865 ret = nfscl_moveopen(vp, clp, nmp, lop, 3866 owp, dp, cred, p); 3867 if (ret == NFSERR_STALECLIENTID || 3868 ret == NFSERR_STALEDONTRECOVER || 3869 ret == NFSERR_BADSESSION) { 3870 if (gotvp) 3871 vrele(vp); 3872 return (ret); 3873 } 3874 if (ret) { 3875 nfscl_freeopen(lop, 1); 3876 if (!error) 3877 error = ret; 3878 } 3879 break; 3880 } 3881 } 3882 3883 /* 3884 * If no openowner found, create one and get an open 3885 * for it. 3886 */ 3887 if (owp == NULL) { 3888 MALLOC(nowp, struct nfsclowner *, 3889 sizeof (struct nfsclowner), M_NFSCLOWNER, 3890 M_WAITOK); 3891 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3892 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3893 dp->nfsdl_fhlen, NULL); 3894 newnfs_copycred(&dp->nfsdl_cred, cred); 3895 ret = nfscl_moveopen(vp, clp, nmp, lop, 3896 owp, dp, cred, p); 3897 if (ret) { 3898 nfscl_freeopenowner(owp, 0); 3899 if (ret == NFSERR_STALECLIENTID || 3900 ret == NFSERR_STALEDONTRECOVER || 3901 ret == NFSERR_BADSESSION) { 3902 if (gotvp) 3903 vrele(vp); 3904 return (ret); 3905 } 3906 if (ret) { 3907 nfscl_freeopen(lop, 1); 3908 if (!error) 3909 error = ret; 3910 } 3911 } 3912 } 3913 } 3914 } 3915 3916 /* 3917 * Now, get byte range locks for any locks done locally. 3918 */ 3919 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3920 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 3921 newnfs_copycred(&dp->nfsdl_cred, cred); 3922 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 3923 if (ret == NFSERR_STALESTATEID || 3924 ret == NFSERR_STALEDONTRECOVER || 3925 ret == NFSERR_STALECLIENTID || 3926 ret == NFSERR_BADSESSION) { 3927 if (gotvp) 3928 vrele(vp); 3929 return (ret); 3930 } 3931 if (ret && !error) 3932 error = ret; 3933 } 3934 } 3935 if (gotvp) 3936 vrele(vp); 3937 return (error); 3938} 3939 3940/* 3941 * Move a locally issued open over to an owner on the state list. 3942 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 3943 * returns with it unlocked. 3944 */ 3945static int 3946nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3947 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 3948 struct ucred *cred, NFSPROC_T *p) 3949{ 3950 struct nfsclopen *op, *nop; 3951 struct nfscldeleg *ndp; 3952 struct nfsnode *np; 3953 int error = 0, newone; 3954 3955 /* 3956 * First, look for an appropriate open, If found, just increment the 3957 * opencnt in it. 3958 */ 3959 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3960 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 3961 op->nfso_fhlen == lop->nfso_fhlen && 3962 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 3963 op->nfso_opencnt += lop->nfso_opencnt; 3964 nfscl_freeopen(lop, 1); 3965 return (0); 3966 } 3967 } 3968 3969 /* No appropriate open, so we have to do one against the server. */ 3970 np = VTONFS(vp); 3971 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 3972 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 3973 newone = 0; 3974 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 3975 lop->nfso_fh, lop->nfso_fhlen, &newone); 3976 ndp = dp; 3977 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 3978 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 3979 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 3980 if (error) { 3981 if (newone) 3982 nfscl_freeopen(op, 0); 3983 } else { 3984 if (newone) 3985 newnfs_copyincred(cred, &op->nfso_cred); 3986 op->nfso_mode |= lop->nfso_mode; 3987 op->nfso_opencnt += lop->nfso_opencnt; 3988 nfscl_freeopen(lop, 1); 3989 } 3990 if (nop != NULL) 3991 FREE((caddr_t)nop, M_NFSCLOPEN); 3992 if (ndp != NULL) { 3993 /* 3994 * What should I do with the returned delegation, since the 3995 * delegation is being recalled? For now, just printf and 3996 * through it away. 3997 */ 3998 printf("Moveopen returned deleg\n"); 3999 FREE((caddr_t)ndp, M_NFSCLDELEG); 4000 } 4001 return (error); 4002} 4003 4004/* 4005 * Recall all delegations on this client. 4006 */ 4007static void 4008nfscl_totalrecall(struct nfsclclient *clp) 4009{ 4010 struct nfscldeleg *dp; 4011 4012 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4013 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4014 dp->nfsdl_flags |= NFSCLDL_RECALL; 4015 } 4016} 4017 4018/* 4019 * Relock byte ranges. Called for delegation recall and state expiry. 4020 */ 4021static int 4022nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4023 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4024 NFSPROC_T *p) 4025{ 4026 struct nfscllockowner *nlp; 4027 struct nfsfh *nfhp; 4028 u_int64_t off, len; 4029 u_int32_t clidrev = 0; 4030 int error, newone, donelocally; 4031 4032 off = lop->nfslo_first; 4033 len = lop->nfslo_end - lop->nfslo_first; 4034 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4035 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4036 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4037 if (error || donelocally) 4038 return (error); 4039 if (nmp->nm_clp != NULL) 4040 clidrev = nmp->nm_clp->nfsc_clientidrev; 4041 else 4042 clidrev = 0; 4043 nfhp = VTONFS(vp)->n_fhp; 4044 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4045 nfhp->nfh_len, nlp, newone, 0, off, 4046 len, lop->nfslo_type, cred, p); 4047 if (error) 4048 nfscl_freelockowner(nlp, 0); 4049 return (error); 4050} 4051 4052/* 4053 * Called to re-open a file. Basically get a vnode for the file handle 4054 * and then call nfsrpc_openrpc() to do the rest. 4055 */ 4056static int 4057nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4058 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4059 struct ucred *cred, NFSPROC_T *p) 4060{ 4061 struct nfsnode *np; 4062 vnode_t vp; 4063 int error; 4064 4065 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4066 if (error) 4067 return (error); 4068 vp = NFSTOV(np); 4069 if (np->n_v4 != NULL) { 4070 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4071 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4072 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4073 cred, p); 4074 } else { 4075 error = EINVAL; 4076 } 4077 vrele(vp); 4078 return (error); 4079} 4080 4081/* 4082 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4083 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4084 * fail. 4085 */ 4086static int 4087nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4088 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4089 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4090 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4091{ 4092 int error; 4093 4094 do { 4095 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4096 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4097 0, 0); 4098 if (error == NFSERR_DELAY) 4099 (void) nfs_catnap(PZERO, error, "nfstryop"); 4100 } while (error == NFSERR_DELAY); 4101 if (error == EAUTH || error == EACCES) { 4102 /* Try again using system credentials */ 4103 newnfs_setroot(cred); 4104 do { 4105 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4106 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4107 delegtype, cred, p, 1, 0); 4108 if (error == NFSERR_DELAY) 4109 (void) nfs_catnap(PZERO, error, "nfstryop"); 4110 } while (error == NFSERR_DELAY); 4111 } 4112 return (error); 4113} 4114 4115/* 4116 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4117 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4118 * cred don't work. 4119 */ 4120static int 4121nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4122 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4123 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4124{ 4125 struct nfsrv_descript nfsd, *nd = &nfsd; 4126 int error; 4127 4128 do { 4129 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4130 reclaim, off, len, type, cred, p, 0); 4131 if (!error && nd->nd_repstat == NFSERR_DELAY) 4132 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4133 "nfstrylck"); 4134 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4135 if (!error) 4136 error = nd->nd_repstat; 4137 if (error == EAUTH || error == EACCES) { 4138 /* Try again using root credentials */ 4139 newnfs_setroot(cred); 4140 do { 4141 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4142 newone, reclaim, off, len, type, cred, p, 1); 4143 if (!error && nd->nd_repstat == NFSERR_DELAY) 4144 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4145 "nfstrylck"); 4146 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4147 if (!error) 4148 error = nd->nd_repstat; 4149 } 4150 return (error); 4151} 4152 4153/* 4154 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4155 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4156 * credentials fail. 4157 */ 4158static int 4159nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4160 struct nfsmount *nmp, NFSPROC_T *p) 4161{ 4162 int error; 4163 4164 do { 4165 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4166 if (error == NFSERR_DELAY) 4167 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4168 } while (error == NFSERR_DELAY); 4169 if (error == EAUTH || error == EACCES) { 4170 /* Try again using system credentials */ 4171 newnfs_setroot(cred); 4172 do { 4173 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4174 if (error == NFSERR_DELAY) 4175 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4176 } while (error == NFSERR_DELAY); 4177 } 4178 return (error); 4179} 4180 4181/* 4182 * Try a close against the server. Just call nfsrpc_closerpc(), 4183 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4184 * credentials fail. 4185 */ 4186APPLESTATIC int 4187nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4188 struct nfsmount *nmp, NFSPROC_T *p) 4189{ 4190 struct nfsrv_descript nfsd, *nd = &nfsd; 4191 int error; 4192 4193 do { 4194 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4195 if (error == NFSERR_DELAY) 4196 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4197 } while (error == NFSERR_DELAY); 4198 if (error == EAUTH || error == EACCES) { 4199 /* Try again using system credentials */ 4200 newnfs_setroot(cred); 4201 do { 4202 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4203 if (error == NFSERR_DELAY) 4204 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4205 } while (error == NFSERR_DELAY); 4206 } 4207 return (error); 4208} 4209 4210/* 4211 * Decide if a delegation on a file permits close without flushing writes 4212 * to the server. This might be a big performance win in some environments. 4213 * (Not useful until the client does caching on local stable storage.) 4214 */ 4215APPLESTATIC int 4216nfscl_mustflush(vnode_t vp) 4217{ 4218 struct nfsclclient *clp; 4219 struct nfscldeleg *dp; 4220 struct nfsnode *np; 4221 struct nfsmount *nmp; 4222 4223 np = VTONFS(vp); 4224 nmp = VFSTONFS(vnode_mount(vp)); 4225 if (!NFSHASNFSV4(nmp)) 4226 return (1); 4227 NFSLOCKCLSTATE(); 4228 clp = nfscl_findcl(nmp); 4229 if (clp == NULL) { 4230 NFSUNLOCKCLSTATE(); 4231 return (1); 4232 } 4233 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4234 if (dp != NULL && (dp->nfsdl_flags & 4235 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4236 NFSCLDL_WRITE && 4237 (dp->nfsdl_sizelimit >= np->n_size || 4238 !NFSHASSTRICT3530(nmp))) { 4239 NFSUNLOCKCLSTATE(); 4240 return (0); 4241 } 4242 NFSUNLOCKCLSTATE(); 4243 return (1); 4244} 4245 4246/* 4247 * See if a (write) delegation exists for this file. 4248 */ 4249APPLESTATIC int 4250nfscl_nodeleg(vnode_t vp, int writedeleg) 4251{ 4252 struct nfsclclient *clp; 4253 struct nfscldeleg *dp; 4254 struct nfsnode *np; 4255 struct nfsmount *nmp; 4256 4257 np = VTONFS(vp); 4258 nmp = VFSTONFS(vnode_mount(vp)); 4259 if (!NFSHASNFSV4(nmp)) 4260 return (1); 4261 NFSLOCKCLSTATE(); 4262 clp = nfscl_findcl(nmp); 4263 if (clp == NULL) { 4264 NFSUNLOCKCLSTATE(); 4265 return (1); 4266 } 4267 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4268 if (dp != NULL && 4269 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4270 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4271 NFSCLDL_WRITE)) { 4272 NFSUNLOCKCLSTATE(); 4273 return (0); 4274 } 4275 NFSUNLOCKCLSTATE(); 4276 return (1); 4277} 4278 4279/* 4280 * Look for an associated delegation that should be DelegReturned. 4281 */ 4282APPLESTATIC int 4283nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4284{ 4285 struct nfsclclient *clp; 4286 struct nfscldeleg *dp; 4287 struct nfsclowner *owp; 4288 struct nfscllockowner *lp; 4289 struct nfsmount *nmp; 4290 struct ucred *cred; 4291 struct nfsnode *np; 4292 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4293 4294 nmp = VFSTONFS(vnode_mount(vp)); 4295 np = VTONFS(vp); 4296 NFSLOCKCLSTATE(); 4297 /* 4298 * Loop around waiting for: 4299 * - outstanding I/O operations on delegations to complete 4300 * - for a delegation on vp that has state, lock the client and 4301 * do a recall 4302 * - return delegation with no state 4303 */ 4304 while (1) { 4305 clp = nfscl_findcl(nmp); 4306 if (clp == NULL) { 4307 NFSUNLOCKCLSTATE(); 4308 return (retcnt); 4309 } 4310 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4311 np->n_fhp->nfh_len); 4312 if (dp != NULL) { 4313 /* 4314 * Wait for outstanding I/O ops to be done. 4315 */ 4316 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4317 if (igotlock) { 4318 nfsv4_unlock(&clp->nfsc_lock, 0); 4319 igotlock = 0; 4320 } 4321 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4322 (void) nfsmsleep(&dp->nfsdl_rwlock, 4323 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4324 continue; 4325 } 4326 needsrecall = 0; 4327 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4328 if (!LIST_EMPTY(&owp->nfsow_open)) { 4329 needsrecall = 1; 4330 break; 4331 } 4332 } 4333 if (!needsrecall) { 4334 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4335 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4336 needsrecall = 1; 4337 break; 4338 } 4339 } 4340 } 4341 if (needsrecall && !triedrecall) { 4342 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4343 islept = 0; 4344 while (!igotlock) { 4345 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4346 &islept, NFSCLSTATEMUTEXPTR, NULL); 4347 if (islept) 4348 break; 4349 } 4350 if (islept) 4351 continue; 4352 NFSUNLOCKCLSTATE(); 4353 cred = newnfs_getcred(); 4354 newnfs_copycred(&dp->nfsdl_cred, cred); 4355 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 4356 NFSFREECRED(cred); 4357 triedrecall = 1; 4358 NFSLOCKCLSTATE(); 4359 nfsv4_unlock(&clp->nfsc_lock, 0); 4360 igotlock = 0; 4361 continue; 4362 } 4363 *stp = dp->nfsdl_stateid; 4364 retcnt = 1; 4365 nfscl_cleandeleg(dp); 4366 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4367 } 4368 if (igotlock) 4369 nfsv4_unlock(&clp->nfsc_lock, 0); 4370 NFSUNLOCKCLSTATE(); 4371 return (retcnt); 4372 } 4373} 4374 4375/* 4376 * Look for associated delegation(s) that should be DelegReturned. 4377 */ 4378APPLESTATIC int 4379nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4380 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4381{ 4382 struct nfsclclient *clp; 4383 struct nfscldeleg *dp; 4384 struct nfsclowner *owp; 4385 struct nfscllockowner *lp; 4386 struct nfsmount *nmp; 4387 struct ucred *cred; 4388 struct nfsnode *np; 4389 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4390 4391 nmp = VFSTONFS(vnode_mount(fvp)); 4392 *gotfdp = 0; 4393 *gottdp = 0; 4394 NFSLOCKCLSTATE(); 4395 /* 4396 * Loop around waiting for: 4397 * - outstanding I/O operations on delegations to complete 4398 * - for a delegation on fvp that has state, lock the client and 4399 * do a recall 4400 * - return delegation(s) with no state. 4401 */ 4402 while (1) { 4403 clp = nfscl_findcl(nmp); 4404 if (clp == NULL) { 4405 NFSUNLOCKCLSTATE(); 4406 return (retcnt); 4407 } 4408 np = VTONFS(fvp); 4409 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4410 np->n_fhp->nfh_len); 4411 if (dp != NULL && *gotfdp == 0) { 4412 /* 4413 * Wait for outstanding I/O ops to be done. 4414 */ 4415 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4416 if (igotlock) { 4417 nfsv4_unlock(&clp->nfsc_lock, 0); 4418 igotlock = 0; 4419 } 4420 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4421 (void) nfsmsleep(&dp->nfsdl_rwlock, 4422 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4423 continue; 4424 } 4425 needsrecall = 0; 4426 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4427 if (!LIST_EMPTY(&owp->nfsow_open)) { 4428 needsrecall = 1; 4429 break; 4430 } 4431 } 4432 if (!needsrecall) { 4433 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4434 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4435 needsrecall = 1; 4436 break; 4437 } 4438 } 4439 } 4440 if (needsrecall && !triedrecall) { 4441 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4442 islept = 0; 4443 while (!igotlock) { 4444 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4445 &islept, NFSCLSTATEMUTEXPTR, NULL); 4446 if (islept) 4447 break; 4448 } 4449 if (islept) 4450 continue; 4451 NFSUNLOCKCLSTATE(); 4452 cred = newnfs_getcred(); 4453 newnfs_copycred(&dp->nfsdl_cred, cred); 4454 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4455 NFSFREECRED(cred); 4456 triedrecall = 1; 4457 NFSLOCKCLSTATE(); 4458 nfsv4_unlock(&clp->nfsc_lock, 0); 4459 igotlock = 0; 4460 continue; 4461 } 4462 *fstp = dp->nfsdl_stateid; 4463 retcnt++; 4464 *gotfdp = 1; 4465 nfscl_cleandeleg(dp); 4466 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4467 } 4468 if (igotlock) { 4469 nfsv4_unlock(&clp->nfsc_lock, 0); 4470 igotlock = 0; 4471 } 4472 if (tvp != NULL) { 4473 np = VTONFS(tvp); 4474 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4475 np->n_fhp->nfh_len); 4476 if (dp != NULL && *gottdp == 0) { 4477 /* 4478 * Wait for outstanding I/O ops to be done. 4479 */ 4480 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4481 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4482 (void) nfsmsleep(&dp->nfsdl_rwlock, 4483 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4484 continue; 4485 } 4486 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4487 if (!LIST_EMPTY(&owp->nfsow_open)) { 4488 NFSUNLOCKCLSTATE(); 4489 return (retcnt); 4490 } 4491 } 4492 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4493 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4494 NFSUNLOCKCLSTATE(); 4495 return (retcnt); 4496 } 4497 } 4498 *tstp = dp->nfsdl_stateid; 4499 retcnt++; 4500 *gottdp = 1; 4501 nfscl_cleandeleg(dp); 4502 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4503 } 4504 } 4505 NFSUNLOCKCLSTATE(); 4506 return (retcnt); 4507 } 4508} 4509 4510/* 4511 * Get a reference on the clientid associated with the mount point. 4512 * Return 1 if success, 0 otherwise. 4513 */ 4514APPLESTATIC int 4515nfscl_getref(struct nfsmount *nmp) 4516{ 4517 struct nfsclclient *clp; 4518 4519 NFSLOCKCLSTATE(); 4520 clp = nfscl_findcl(nmp); 4521 if (clp == NULL) { 4522 NFSUNLOCKCLSTATE(); 4523 return (0); 4524 } 4525 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4526 NFSUNLOCKCLSTATE(); 4527 return (1); 4528} 4529 4530/* 4531 * Release a reference on a clientid acquired with the above call. 4532 */ 4533APPLESTATIC void 4534nfscl_relref(struct nfsmount *nmp) 4535{ 4536 struct nfsclclient *clp; 4537 4538 NFSLOCKCLSTATE(); 4539 clp = nfscl_findcl(nmp); 4540 if (clp == NULL) { 4541 NFSUNLOCKCLSTATE(); 4542 return; 4543 } 4544 nfsv4_relref(&clp->nfsc_lock); 4545 NFSUNLOCKCLSTATE(); 4546} 4547 4548/* 4549 * Save the size attribute in the delegation, since the nfsnode 4550 * is going away. 4551 */ 4552APPLESTATIC void 4553nfscl_reclaimnode(vnode_t vp) 4554{ 4555 struct nfsclclient *clp; 4556 struct nfscldeleg *dp; 4557 struct nfsnode *np = VTONFS(vp); 4558 struct nfsmount *nmp; 4559 4560 nmp = VFSTONFS(vnode_mount(vp)); 4561 if (!NFSHASNFSV4(nmp)) 4562 return; 4563 NFSLOCKCLSTATE(); 4564 clp = nfscl_findcl(nmp); 4565 if (clp == NULL) { 4566 NFSUNLOCKCLSTATE(); 4567 return; 4568 } 4569 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4570 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4571 dp->nfsdl_size = np->n_size; 4572 NFSUNLOCKCLSTATE(); 4573} 4574 4575/* 4576 * Get the saved size attribute in the delegation, since it is a 4577 * newly allocated nfsnode. 4578 */ 4579APPLESTATIC void 4580nfscl_newnode(vnode_t vp) 4581{ 4582 struct nfsclclient *clp; 4583 struct nfscldeleg *dp; 4584 struct nfsnode *np = VTONFS(vp); 4585 struct nfsmount *nmp; 4586 4587 nmp = VFSTONFS(vnode_mount(vp)); 4588 if (!NFSHASNFSV4(nmp)) 4589 return; 4590 NFSLOCKCLSTATE(); 4591 clp = nfscl_findcl(nmp); 4592 if (clp == NULL) { 4593 NFSUNLOCKCLSTATE(); 4594 return; 4595 } 4596 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4597 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4598 np->n_size = dp->nfsdl_size; 4599 NFSUNLOCKCLSTATE(); 4600} 4601 4602/* 4603 * If there is a valid write delegation for this file, set the modtime 4604 * to the local clock time. 4605 */ 4606APPLESTATIC void 4607nfscl_delegmodtime(vnode_t vp) 4608{ 4609 struct nfsclclient *clp; 4610 struct nfscldeleg *dp; 4611 struct nfsnode *np = VTONFS(vp); 4612 struct nfsmount *nmp; 4613 4614 nmp = VFSTONFS(vnode_mount(vp)); 4615 if (!NFSHASNFSV4(nmp)) 4616 return; 4617 NFSLOCKCLSTATE(); 4618 clp = nfscl_findcl(nmp); 4619 if (clp == NULL) { 4620 NFSUNLOCKCLSTATE(); 4621 return; 4622 } 4623 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4624 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4625 nanotime(&dp->nfsdl_modtime); 4626 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4627 } 4628 NFSUNLOCKCLSTATE(); 4629} 4630 4631/* 4632 * If there is a valid write delegation for this file with a modtime set, 4633 * put that modtime in mtime. 4634 */ 4635APPLESTATIC void 4636nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4637{ 4638 struct nfsclclient *clp; 4639 struct nfscldeleg *dp; 4640 struct nfsnode *np = VTONFS(vp); 4641 struct nfsmount *nmp; 4642 4643 nmp = VFSTONFS(vnode_mount(vp)); 4644 if (!NFSHASNFSV4(nmp)) 4645 return; 4646 NFSLOCKCLSTATE(); 4647 clp = nfscl_findcl(nmp); 4648 if (clp == NULL) { 4649 NFSUNLOCKCLSTATE(); 4650 return; 4651 } 4652 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4653 if (dp != NULL && 4654 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4655 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4656 *mtime = dp->nfsdl_modtime; 4657 NFSUNLOCKCLSTATE(); 4658} 4659 4660static int 4661nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4662{ 4663 short *defaulterrp, *errp; 4664 4665 if (!nd->nd_repstat) 4666 return (0); 4667 if (nd->nd_procnum == NFSPROC_NOOP) 4668 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4669 if (nd->nd_repstat == EBADRPC) 4670 return (txdr_unsigned(NFSERR_BADXDR)); 4671 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4672 nd->nd_repstat == NFSERR_OPILLEGAL) 4673 return (txdr_unsigned(nd->nd_repstat)); 4674 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4675 minorvers > NFSV4_MINORVERSION) { 4676 /* NFSv4.n error. */ 4677 return (txdr_unsigned(nd->nd_repstat)); 4678 } 4679 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4680 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4681 else 4682 return (txdr_unsigned(nd->nd_repstat)); 4683 while (*++errp) 4684 if (*errp == (short)nd->nd_repstat) 4685 return (txdr_unsigned(nd->nd_repstat)); 4686 return (txdr_unsigned(*defaulterrp)); 4687} 4688 4689/* 4690 * Called to find/add a layout to a client. 4691 * This function returns the layout with a refcnt (shared lock) upon 4692 * success (returns 0) or with no lock/refcnt on the layout when an 4693 * error is returned. 4694 * If a layout is passed in via lypp, it is locked (exclusively locked). 4695 */ 4696APPLESTATIC int 4697nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4698 nfsv4stateid_t *stateidp, int retonclose, 4699 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4700 struct ucred *cred, NFSPROC_T *p) 4701{ 4702 struct nfsclclient *clp; 4703 struct nfscllayout *lyp, *tlyp; 4704 struct nfsclflayout *flp; 4705 struct nfsnode *np = VTONFS(vp); 4706 mount_t mp; 4707 int layout_passed_in; 4708 4709 mp = nmp->nm_mountp; 4710 layout_passed_in = 1; 4711 tlyp = NULL; 4712 lyp = *lypp; 4713 if (lyp == NULL) { 4714 layout_passed_in = 0; 4715 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4716 M_WAITOK | M_ZERO); 4717 } 4718 4719 NFSLOCKCLSTATE(); 4720 clp = nmp->nm_clp; 4721 if (clp == NULL) { 4722 if (layout_passed_in != 0) 4723 nfsv4_unlock(&lyp->nfsly_lock, 0); 4724 NFSUNLOCKCLSTATE(); 4725 if (tlyp != NULL) 4726 free(tlyp, M_NFSLAYOUT); 4727 return (EPERM); 4728 } 4729 if (lyp == NULL) { 4730 /* 4731 * Although no lyp was passed in, another thread might have 4732 * allocated one. If one is found, just increment it's ref 4733 * count and return it. 4734 */ 4735 lyp = nfscl_findlayout(clp, fhp, fhlen); 4736 if (lyp == NULL) { 4737 lyp = tlyp; 4738 tlyp = NULL; 4739 lyp->nfsly_stateid.seqid = stateidp->seqid; 4740 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 4741 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 4742 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 4743 lyp->nfsly_lastbyte = 0; 4744 LIST_INIT(&lyp->nfsly_flayread); 4745 LIST_INIT(&lyp->nfsly_flayrw); 4746 LIST_INIT(&lyp->nfsly_recall); 4747 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 4748 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 4749 lyp->nfsly_clp = clp; 4750 lyp->nfsly_flags = (retonclose != 0) ? 4751 (NFSLY_FILES | NFSLY_RETONCLOSE) : NFSLY_FILES; 4752 lyp->nfsly_fhlen = fhlen; 4753 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 4754 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4755 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 4756 nfsly_hash); 4757 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4758 nfscl_layoutcnt++; 4759 } else { 4760 if (retonclose != 0) 4761 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4762 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4763 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4764 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4765 } 4766 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 4767 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 4768 NFSUNLOCKCLSTATE(); 4769 if (tlyp != NULL) 4770 free(tlyp, M_NFSLAYOUT); 4771 return (EPERM); 4772 } 4773 *lypp = lyp; 4774 } else 4775 lyp->nfsly_stateid.seqid = stateidp->seqid; 4776 4777 /* Merge the new list of File Layouts into the list. */ 4778 flp = LIST_FIRST(fhlp); 4779 if (flp != NULL) { 4780 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 4781 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 4782 else 4783 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 4784 } 4785 if (layout_passed_in != 0) 4786 nfsv4_unlock(&lyp->nfsly_lock, 1); 4787 NFSUNLOCKCLSTATE(); 4788 if (tlyp != NULL) 4789 free(tlyp, M_NFSLAYOUT); 4790 return (0); 4791} 4792 4793/* 4794 * Search for a layout by MDS file handle. 4795 * If one is found, it is returned with a refcnt (shared lock) iff 4796 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 4797 * returned NULL. 4798 */ 4799struct nfscllayout * 4800nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 4801 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 4802{ 4803 struct nfscllayout *lyp; 4804 mount_t mp; 4805 int error, igotlock; 4806 4807 mp = clp->nfsc_nmp->nm_mountp; 4808 *recalledp = 0; 4809 *retflpp = NULL; 4810 NFSLOCKCLSTATE(); 4811 lyp = nfscl_findlayout(clp, fhp, fhlen); 4812 if (lyp != NULL) { 4813 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4814 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4815 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4816 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4817 error = nfscl_findlayoutforio(lyp, off, 4818 NFSV4OPEN_ACCESSREAD, retflpp); 4819 if (error == 0) 4820 nfsv4_getref(&lyp->nfsly_lock, NULL, 4821 NFSCLSTATEMUTEXPTR, mp); 4822 else { 4823 do { 4824 igotlock = nfsv4_lock(&lyp->nfsly_lock, 4825 1, NULL, NFSCLSTATEMUTEXPTR, mp); 4826 } while (igotlock == 0 && 4827 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0); 4828 *retflpp = NULL; 4829 } 4830 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 4831 lyp = NULL; 4832 *recalledp = 1; 4833 } 4834 } else { 4835 lyp = NULL; 4836 *recalledp = 1; 4837 } 4838 } 4839 NFSUNLOCKCLSTATE(); 4840 return (lyp); 4841} 4842 4843/* 4844 * Search for a layout by MDS file handle. If one is found that is marked 4845 * "return on close", delete it, since it should now be forgotten. 4846 */ 4847static void 4848nfscl_retoncloselayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen) 4849{ 4850 struct nfscllayout *lyp; 4851 4852tryagain: 4853 lyp = nfscl_findlayout(clp, fhp, fhlen); 4854 if (lyp != NULL && (lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) { 4855 /* 4856 * Wait for outstanding I/O ops to be done. 4857 */ 4858 if (lyp->nfsly_lock.nfslock_usecnt != 0 || 4859 lyp->nfsly_lock.nfslock_lock != 0) { 4860 lyp->nfsly_lock.nfslock_lock |= NFSV4LOCK_WANTED; 4861 (void)mtx_sleep(&lyp->nfsly_lock, 4862 NFSCLSTATEMUTEXPTR, PZERO, "nfslyc", 0); 4863 goto tryagain; 4864 } 4865 nfscl_freelayout(lyp); 4866 } 4867} 4868 4869/* 4870 * Dereference a layout. 4871 */ 4872void 4873nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 4874{ 4875 4876 NFSLOCKCLSTATE(); 4877 if (exclocked != 0) 4878 nfsv4_unlock(&lyp->nfsly_lock, 0); 4879 else 4880 nfsv4_relref(&lyp->nfsly_lock); 4881 NFSUNLOCKCLSTATE(); 4882} 4883 4884/* 4885 * Search for a devinfo by deviceid. If one is found, return it after 4886 * acquiring a reference count on it. 4887 */ 4888struct nfscldevinfo * 4889nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 4890 struct nfscldevinfo *dip) 4891{ 4892 4893 NFSLOCKCLSTATE(); 4894 if (dip == NULL) 4895 dip = nfscl_finddevinfo(clp, deviceid); 4896 if (dip != NULL) 4897 dip->nfsdi_refcnt++; 4898 NFSUNLOCKCLSTATE(); 4899 return (dip); 4900} 4901 4902/* 4903 * Dereference a devinfo structure. 4904 */ 4905static void 4906nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 4907{ 4908 4909 dip->nfsdi_refcnt--; 4910 if (dip->nfsdi_refcnt == 0) 4911 wakeup(&dip->nfsdi_refcnt); 4912} 4913 4914/* 4915 * Dereference a devinfo structure. 4916 */ 4917void 4918nfscl_reldevinfo(struct nfscldevinfo *dip) 4919{ 4920 4921 NFSLOCKCLSTATE(); 4922 nfscl_reldevinfo_locked(dip); 4923 NFSUNLOCKCLSTATE(); 4924} 4925 4926/* 4927 * Find a layout for this file handle. Return NULL upon failure. 4928 */ 4929static struct nfscllayout * 4930nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 4931{ 4932 struct nfscllayout *lyp; 4933 4934 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 4935 if (lyp->nfsly_fhlen == fhlen && 4936 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 4937 break; 4938 return (lyp); 4939} 4940 4941/* 4942 * Find a devinfo for this deviceid. Return NULL upon failure. 4943 */ 4944static struct nfscldevinfo * 4945nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 4946{ 4947 struct nfscldevinfo *dip; 4948 4949 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 4950 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 4951 == 0) 4952 break; 4953 return (dip); 4954} 4955 4956/* 4957 * Merge the new file layout list into the main one, maintaining it in 4958 * increasing offset order. 4959 */ 4960static void 4961nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 4962 struct nfsclflayouthead *newfhlp) 4963{ 4964 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 4965 4966 flp = LIST_FIRST(fhlp); 4967 prevflp = NULL; 4968 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 4969 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 4970 prevflp = flp; 4971 flp = LIST_NEXT(flp, nfsfl_list); 4972 } 4973 if (prevflp == NULL) 4974 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 4975 else 4976 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 4977 prevflp = nflp; 4978 } 4979} 4980 4981/* 4982 * Add this nfscldevinfo to the client, if it doesn't already exist. 4983 * This function consumes the structure pointed at by dip, if not NULL. 4984 */ 4985APPLESTATIC int 4986nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, 4987 struct nfsclflayout *flp) 4988{ 4989 struct nfsclclient *clp; 4990 struct nfscldevinfo *tdip; 4991 4992 NFSLOCKCLSTATE(); 4993 clp = nmp->nm_clp; 4994 if (clp == NULL) { 4995 NFSUNLOCKCLSTATE(); 4996 if (dip != NULL) 4997 free(dip, M_NFSDEVINFO); 4998 return (ENODEV); 4999 } 5000 tdip = nfscl_finddevinfo(clp, flp->nfsfl_dev); 5001 if (tdip != NULL) { 5002 tdip->nfsdi_layoutrefs++; 5003 flp->nfsfl_devp = tdip; 5004 nfscl_reldevinfo_locked(tdip); 5005 NFSUNLOCKCLSTATE(); 5006 if (dip != NULL) 5007 free(dip, M_NFSDEVINFO); 5008 return (0); 5009 } 5010 if (dip != NULL) { 5011 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5012 dip->nfsdi_layoutrefs = 1; 5013 flp->nfsfl_devp = dip; 5014 } 5015 NFSUNLOCKCLSTATE(); 5016 if (dip == NULL) 5017 return (ENODEV); 5018 return (0); 5019} 5020 5021/* 5022 * Free up a layout structure and associated file layout structure(s). 5023 */ 5024APPLESTATIC void 5025nfscl_freelayout(struct nfscllayout *layp) 5026{ 5027 struct nfsclflayout *flp, *nflp; 5028 struct nfsclrecalllayout *rp, *nrp; 5029 5030 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5031 LIST_REMOVE(flp, nfsfl_list); 5032 nfscl_freeflayout(flp); 5033 } 5034 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5035 LIST_REMOVE(flp, nfsfl_list); 5036 nfscl_freeflayout(flp); 5037 } 5038 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5039 LIST_REMOVE(rp, nfsrecly_list); 5040 free(rp, M_NFSLAYRECALL); 5041 } 5042 nfscl_layoutcnt--; 5043 free(layp, M_NFSLAYOUT); 5044} 5045 5046/* 5047 * Free up a file layout structure. 5048 */ 5049APPLESTATIC void 5050nfscl_freeflayout(struct nfsclflayout *flp) 5051{ 5052 int i; 5053 5054 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5055 free(flp->nfsfl_fh[i], M_NFSFH); 5056 if (flp->nfsfl_devp != NULL) 5057 flp->nfsfl_devp->nfsdi_layoutrefs--; 5058 free(flp, M_NFSFLAYOUT); 5059} 5060 5061/* 5062 * Free up a file layout devinfo structure. 5063 */ 5064APPLESTATIC void 5065nfscl_freedevinfo(struct nfscldevinfo *dip) 5066{ 5067 5068 free(dip, M_NFSDEVINFO); 5069} 5070 5071/* 5072 * Mark any layouts that match as recalled. 5073 */ 5074static int 5075nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5076 uint64_t off, uint64_t len, uint32_t stateseqid, 5077 struct nfsclrecalllayout *recallp) 5078{ 5079 struct nfsclrecalllayout *rp, *orp; 5080 5081 recallp->nfsrecly_recalltype = recalltype; 5082 recallp->nfsrecly_iomode = iomode; 5083 recallp->nfsrecly_stateseqid = stateseqid; 5084 recallp->nfsrecly_off = off; 5085 recallp->nfsrecly_len = len; 5086 /* 5087 * Order the list as file returns first, followed by fsid and any 5088 * returns, both in increasing stateseqid order. 5089 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5090 * (I'm not sure this is correct because I find RFC5661 confusing 5091 * on this, but hopefully it will work ok.) 5092 */ 5093 orp = NULL; 5094 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5095 orp = rp; 5096 if ((recalltype == NFSLAYOUTRETURN_FILE && 5097 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5098 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5099 (recalltype != NFSLAYOUTRETURN_FILE && 5100 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5101 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5102 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5103 break; 5104 } 5105 } 5106 if (rp == NULL) { 5107 if (orp == NULL) 5108 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5109 nfsrecly_list); 5110 else 5111 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5112 } 5113 lyp->nfsly_flags |= NFSLY_RECALL; 5114 return (0); 5115} 5116 5117/* 5118 * Compare the two seqids for ordering. The trick is that the seqids can 5119 * wrap around from 0xffffffff->0, so check for the cases where one 5120 * has wrapped around. 5121 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5122 */ 5123static int 5124nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5125{ 5126 5127 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5128 /* seqid2 has wrapped around. */ 5129 return (0); 5130 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5131 /* seqid1 has wrapped around. */ 5132 return (1); 5133 if (seqid1 <= seqid2) 5134 return (1); 5135 return (0); 5136} 5137 5138/* 5139 * Do a layout return for each of the recalls. 5140 */ 5141static void 5142nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5143 struct ucred *cred, NFSPROC_T *p) 5144{ 5145 struct nfsclrecalllayout *rp; 5146 nfsv4stateid_t stateid; 5147 5148 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5149 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5150 stateid.seqid = rp->nfsrecly_stateseqid; 5151 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5152 lyp->nfsly_fhlen, 0, NFSLAYOUT_NFSV4_1_FILES, 5153 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5154 rp->nfsrecly_off, rp->nfsrecly_len, 5155 &stateid, 0, NULL, cred, p, NULL); 5156 } 5157} 5158 5159/* 5160 * Do the layout commit for a file layout. 5161 */ 5162static void 5163nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5164 struct ucred *cred, NFSPROC_T *p) 5165{ 5166 struct nfsclflayout *flp; 5167 uint64_t len; 5168 int error; 5169 5170 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5171 if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5172 len = flp->nfsfl_end - flp->nfsfl_off; 5173 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5174 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5175 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5176 NFSLAYOUT_NFSV4_1_FILES, 0, NULL, cred, p, NULL); 5177 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5178 if (error == NFSERR_NOTSUPP) { 5179 /* If not supported, don't bother doing it. */ 5180 NFSLOCKMNT(nmp); 5181 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5182 NFSUNLOCKMNT(nmp); 5183 break; 5184 } 5185 } 5186 } 5187} 5188 5189/* 5190 * Commit all layouts for a file (vnode). 5191 */ 5192int 5193nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5194{ 5195 struct nfsclclient *clp; 5196 struct nfscllayout *lyp; 5197 struct nfsnode *np = VTONFS(vp); 5198 mount_t mp; 5199 struct nfsmount *nmp; 5200 5201 mp = vnode_mount(vp); 5202 nmp = VFSTONFS(mp); 5203 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5204 return (0); 5205 NFSLOCKCLSTATE(); 5206 clp = nmp->nm_clp; 5207 if (clp == NULL) { 5208 NFSUNLOCKCLSTATE(); 5209 return (EPERM); 5210 } 5211 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5212 if (lyp == NULL) { 5213 NFSUNLOCKCLSTATE(); 5214 return (EPERM); 5215 } 5216 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5217 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 5218 NFSUNLOCKCLSTATE(); 5219 return (EPERM); 5220 } 5221tryagain: 5222 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5223 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5224 NFSUNLOCKCLSTATE(); 5225 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5226 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5227 NFSLOCKCLSTATE(); 5228 goto tryagain; 5229 } 5230 nfsv4_relref(&lyp->nfsly_lock); 5231 NFSUNLOCKCLSTATE(); 5232 return (0); 5233} 5234 5235