nfs_clstate.c revision 317474
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 317474 2017-04-26 22:53:29Z 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 nfscl_cleanclient(clp); 1938 NFSLOCKCLSTATE(); 1939 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 1940 NFSCLFLAGS_RECOVER | NFSCLFLAGS_RECVRINPROG); 1941 wakeup(&clp->nfsc_flags); 1942 nfsv4_unlock(&clp->nfsc_lock, 0); 1943 NFSUNLOCKCLSTATE(); 1944 return; 1945 } 1946 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 1947 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 1948 1949 /* 1950 * Mark requests already queued on the server, so that they don't 1951 * initiate another recovery cycle. Any requests already in the 1952 * queue that handle state information will have the old stale 1953 * clientid/stateid and will get a NFSERR_STALESTATEID, 1954 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 1955 * This will be translated to NFSERR_STALEDONTRECOVER when 1956 * R_DONTRECOVER is set. 1957 */ 1958 NFSLOCKREQ(); 1959 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 1960 if (rep->r_nmp == nmp) 1961 rep->r_flags |= R_DONTRECOVER; 1962 } 1963 NFSUNLOCKREQ(); 1964 1965 /* 1966 * Now, mark all delegations "need reclaim". 1967 */ 1968 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 1969 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 1970 1971 TAILQ_INIT(&extra_deleg); 1972 LIST_INIT(&extra_open); 1973 /* 1974 * Now traverse the state lists, doing Open and Lock Reclaims. 1975 */ 1976 tcred = newnfs_getcred(); 1977 owp = LIST_FIRST(&clp->nfsc_owner); 1978 while (owp != NULL) { 1979 nowp = LIST_NEXT(owp, nfsow_list); 1980 owp->nfsow_seqid = 0; 1981 op = LIST_FIRST(&owp->nfsow_open); 1982 while (op != NULL) { 1983 nop = LIST_NEXT(op, nfso_list); 1984 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 1985 /* Search for a delegation to reclaim with the open */ 1986 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1987 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 1988 continue; 1989 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 1990 mode = NFSV4OPEN_ACCESSWRITE; 1991 delegtype = NFSV4OPEN_DELEGATEWRITE; 1992 } else { 1993 mode = NFSV4OPEN_ACCESSREAD; 1994 delegtype = NFSV4OPEN_DELEGATEREAD; 1995 } 1996 if ((op->nfso_mode & mode) == mode && 1997 op->nfso_fhlen == dp->nfsdl_fhlen && 1998 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 1999 break; 2000 } 2001 ndp = dp; 2002 if (dp == NULL) 2003 delegtype = NFSV4OPEN_DELEGATENONE; 2004 newnfs_copycred(&op->nfso_cred, tcred); 2005 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2006 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2007 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2008 tcred, p); 2009 if (!error) { 2010 /* Handle any replied delegation */ 2011 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2012 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2013 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2014 mode = NFSV4OPEN_ACCESSWRITE; 2015 else 2016 mode = NFSV4OPEN_ACCESSREAD; 2017 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2018 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2019 continue; 2020 if ((op->nfso_mode & mode) == mode && 2021 op->nfso_fhlen == dp->nfsdl_fhlen && 2022 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2023 op->nfso_fhlen)) { 2024 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2025 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2026 dp->nfsdl_ace = ndp->nfsdl_ace; 2027 dp->nfsdl_change = ndp->nfsdl_change; 2028 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2029 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2030 dp->nfsdl_flags |= NFSCLDL_RECALL; 2031 FREE((caddr_t)ndp, M_NFSCLDELEG); 2032 ndp = NULL; 2033 break; 2034 } 2035 } 2036 } 2037 if (ndp != NULL) 2038 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2039 2040 /* and reclaim all byte range locks */ 2041 lp = LIST_FIRST(&op->nfso_lock); 2042 while (lp != NULL) { 2043 nlp = LIST_NEXT(lp, nfsl_list); 2044 lp->nfsl_seqid = 0; 2045 firstlock = 1; 2046 lop = LIST_FIRST(&lp->nfsl_lock); 2047 while (lop != NULL) { 2048 nlop = LIST_NEXT(lop, nfslo_list); 2049 if (lop->nfslo_end == NFS64BITSSET) 2050 len = NFS64BITSSET; 2051 else 2052 len = lop->nfslo_end - lop->nfslo_first; 2053 error = nfscl_trylock(nmp, NULL, 2054 op->nfso_fh, op->nfso_fhlen, lp, 2055 firstlock, 1, lop->nfslo_first, len, 2056 lop->nfslo_type, tcred, p); 2057 if (error != 0) 2058 nfscl_freelock(lop, 0); 2059 else 2060 firstlock = 0; 2061 lop = nlop; 2062 } 2063 /* If no locks, but a lockowner, just delete it. */ 2064 if (LIST_EMPTY(&lp->nfsl_lock)) 2065 nfscl_freelockowner(lp, 0); 2066 lp = nlp; 2067 } 2068 } 2069 } 2070 if (error != 0 && error != NFSERR_BADSESSION) 2071 nfscl_freeopen(op, 0); 2072 op = nop; 2073 } 2074 owp = nowp; 2075 } 2076 2077 /* 2078 * Now, try and get any delegations not yet reclaimed by cobbling 2079 * to-gether an appropriate open. 2080 */ 2081 nowp = NULL; 2082 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2083 while (dp != NULL) { 2084 ndp = TAILQ_NEXT(dp, nfsdl_list); 2085 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2086 if (nowp == NULL) { 2087 MALLOC(nowp, struct nfsclowner *, 2088 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2089 /* 2090 * Name must be as long an largest possible 2091 * NFSV4CL_LOCKNAMELEN. 12 for now. 2092 */ 2093 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2094 NFSV4CL_LOCKNAMELEN); 2095 LIST_INIT(&nowp->nfsow_open); 2096 nowp->nfsow_clp = clp; 2097 nowp->nfsow_seqid = 0; 2098 nowp->nfsow_defunct = 0; 2099 nfscl_lockinit(&nowp->nfsow_rwlock); 2100 } 2101 nop = NULL; 2102 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2103 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 2104 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2105 nop->nfso_own = nowp; 2106 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2107 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2108 delegtype = NFSV4OPEN_DELEGATEWRITE; 2109 } else { 2110 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2111 delegtype = NFSV4OPEN_DELEGATEREAD; 2112 } 2113 nop->nfso_opencnt = 0; 2114 nop->nfso_posixlock = 1; 2115 nop->nfso_fhlen = dp->nfsdl_fhlen; 2116 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2117 LIST_INIT(&nop->nfso_lock); 2118 nop->nfso_stateid.seqid = 0; 2119 nop->nfso_stateid.other[0] = 0; 2120 nop->nfso_stateid.other[1] = 0; 2121 nop->nfso_stateid.other[2] = 0; 2122 newnfs_copycred(&dp->nfsdl_cred, tcred); 2123 newnfs_copyincred(tcred, &nop->nfso_cred); 2124 tdp = NULL; 2125 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2126 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2127 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2128 delegtype, tcred, p); 2129 if (tdp != NULL) { 2130 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2131 mode = NFSV4OPEN_ACCESSWRITE; 2132 else 2133 mode = NFSV4OPEN_ACCESSREAD; 2134 if ((nop->nfso_mode & mode) == mode && 2135 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2136 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2137 nop->nfso_fhlen)) { 2138 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2139 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2140 dp->nfsdl_ace = tdp->nfsdl_ace; 2141 dp->nfsdl_change = tdp->nfsdl_change; 2142 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2143 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2144 dp->nfsdl_flags |= NFSCLDL_RECALL; 2145 FREE((caddr_t)tdp, M_NFSCLDELEG); 2146 } else { 2147 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2148 } 2149 } 2150 } 2151 if (error) { 2152 if (nop != NULL) 2153 FREE((caddr_t)nop, M_NFSCLOPEN); 2154 /* 2155 * Couldn't reclaim it, so throw the state 2156 * away. Ouch!! 2157 */ 2158 nfscl_cleandeleg(dp); 2159 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2160 } else { 2161 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2162 } 2163 } 2164 dp = ndp; 2165 } 2166 2167 /* 2168 * Now, get rid of extra Opens and Delegations. 2169 */ 2170 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2171 do { 2172 newnfs_copycred(&op->nfso_cred, tcred); 2173 error = nfscl_tryclose(op, tcred, nmp, p); 2174 if (error == NFSERR_GRACE) 2175 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2176 } while (error == NFSERR_GRACE); 2177 LIST_REMOVE(op, nfso_list); 2178 FREE((caddr_t)op, M_NFSCLOPEN); 2179 } 2180 if (nowp != NULL) 2181 FREE((caddr_t)nowp, M_NFSCLOWNER); 2182 2183 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2184 do { 2185 newnfs_copycred(&dp->nfsdl_cred, tcred); 2186 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2187 if (error == NFSERR_GRACE) 2188 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2189 } while (error == NFSERR_GRACE); 2190 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2191 FREE((caddr_t)dp, M_NFSCLDELEG); 2192 } 2193 2194 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2195 if (NFSHASNFSV4N(nmp)) 2196 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2197 2198 NFSLOCKCLSTATE(); 2199 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2200 wakeup(&clp->nfsc_flags); 2201 nfsv4_unlock(&clp->nfsc_lock, 0); 2202 NFSUNLOCKCLSTATE(); 2203 NFSFREECRED(tcred); 2204} 2205 2206/* 2207 * This function is called when a server replies with NFSERR_EXPIRED. 2208 * It deletes all state for the client and does a fresh SetClientId/confirm. 2209 * XXX Someday it should post a signal to the process(es) that hold the 2210 * state, so they know that lock state has been lost. 2211 */ 2212APPLESTATIC int 2213nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2214{ 2215 struct nfsmount *nmp; 2216 struct ucred *cred; 2217 int igotlock = 0, error, trycnt; 2218 2219 /* 2220 * If the clientid has gone away or a new SetClientid has already 2221 * been done, just return ok. 2222 */ 2223 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2224 return (0); 2225 2226 /* 2227 * First, lock the client structure, so everyone else will 2228 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2229 * that only one thread does the work. 2230 */ 2231 NFSLOCKCLSTATE(); 2232 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2233 do { 2234 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2235 NFSCLSTATEMUTEXPTR, NULL); 2236 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2237 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2238 if (igotlock) 2239 nfsv4_unlock(&clp->nfsc_lock, 0); 2240 NFSUNLOCKCLSTATE(); 2241 return (0); 2242 } 2243 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2244 NFSUNLOCKCLSTATE(); 2245 2246 nmp = clp->nfsc_nmp; 2247 if (nmp == NULL) 2248 panic("nfscl expired"); 2249 cred = newnfs_getcred(); 2250 trycnt = 5; 2251 do { 2252 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 2253 } while ((error == NFSERR_STALECLIENTID || 2254 error == NFSERR_BADSESSION || 2255 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2256 if (error) { 2257 /* 2258 * Clear out any state. 2259 */ 2260 nfscl_cleanclient(clp); 2261 NFSLOCKCLSTATE(); 2262 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID | 2263 NFSCLFLAGS_RECOVER); 2264 } else { 2265 /* 2266 * Expire the state for the client. 2267 */ 2268 nfscl_expireclient(clp, nmp, cred, p); 2269 NFSLOCKCLSTATE(); 2270 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2271 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2272 } 2273 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2274 wakeup(&clp->nfsc_flags); 2275 nfsv4_unlock(&clp->nfsc_lock, 0); 2276 NFSUNLOCKCLSTATE(); 2277 NFSFREECRED(cred); 2278 return (error); 2279} 2280 2281/* 2282 * This function inserts a lock in the list after insert_lop. 2283 */ 2284static void 2285nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2286 struct nfscllock *insert_lop, int local) 2287{ 2288 2289 if ((struct nfscllockowner *)insert_lop == lp) 2290 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2291 else 2292 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2293 if (local) 2294 newnfsstats.cllocallocks++; 2295 else 2296 newnfsstats.cllocks++; 2297} 2298 2299/* 2300 * This function updates the locking for a lock owner and given file. It 2301 * maintains a list of lock ranges ordered on increasing file offset that 2302 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2303 * It always adds new_lop to the list and sometimes uses the one pointed 2304 * at by other_lopp. 2305 * Returns 1 if the locks were modified, 0 otherwise. 2306 */ 2307static int 2308nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2309 struct nfscllock **other_lopp, int local) 2310{ 2311 struct nfscllock *new_lop = *new_lopp; 2312 struct nfscllock *lop, *tlop, *ilop; 2313 struct nfscllock *other_lop; 2314 int unlock = 0, modified = 0; 2315 u_int64_t tmp; 2316 2317 /* 2318 * Work down the list until the lock is merged. 2319 */ 2320 if (new_lop->nfslo_type == F_UNLCK) 2321 unlock = 1; 2322 ilop = (struct nfscllock *)lp; 2323 lop = LIST_FIRST(&lp->nfsl_lock); 2324 while (lop != NULL) { 2325 /* 2326 * Only check locks for this file that aren't before the start of 2327 * new lock's range. 2328 */ 2329 if (lop->nfslo_end >= new_lop->nfslo_first) { 2330 if (new_lop->nfslo_end < lop->nfslo_first) { 2331 /* 2332 * If the new lock ends before the start of the 2333 * current lock's range, no merge, just insert 2334 * the new lock. 2335 */ 2336 break; 2337 } 2338 if (new_lop->nfslo_type == lop->nfslo_type || 2339 (new_lop->nfslo_first <= lop->nfslo_first && 2340 new_lop->nfslo_end >= lop->nfslo_end)) { 2341 /* 2342 * This lock can be absorbed by the new lock/unlock. 2343 * This happens when it covers the entire range 2344 * of the old lock or is contiguous 2345 * with the old lock and is of the same type or an 2346 * unlock. 2347 */ 2348 if (new_lop->nfslo_type != lop->nfslo_type || 2349 new_lop->nfslo_first != lop->nfslo_first || 2350 new_lop->nfslo_end != lop->nfslo_end) 2351 modified = 1; 2352 if (lop->nfslo_first < new_lop->nfslo_first) 2353 new_lop->nfslo_first = lop->nfslo_first; 2354 if (lop->nfslo_end > new_lop->nfslo_end) 2355 new_lop->nfslo_end = lop->nfslo_end; 2356 tlop = lop; 2357 lop = LIST_NEXT(lop, nfslo_list); 2358 nfscl_freelock(tlop, local); 2359 continue; 2360 } 2361 2362 /* 2363 * All these cases are for contiguous locks that are not the 2364 * same type, so they can't be merged. 2365 */ 2366 if (new_lop->nfslo_first <= lop->nfslo_first) { 2367 /* 2368 * This case is where the new lock overlaps with the 2369 * first part of the old lock. Move the start of the 2370 * old lock to just past the end of the new lock. The 2371 * new lock will be inserted in front of the old, since 2372 * ilop hasn't been updated. (We are done now.) 2373 */ 2374 if (lop->nfslo_first != new_lop->nfslo_end) { 2375 lop->nfslo_first = new_lop->nfslo_end; 2376 modified = 1; 2377 } 2378 break; 2379 } 2380 if (new_lop->nfslo_end >= lop->nfslo_end) { 2381 /* 2382 * This case is where the new lock overlaps with the 2383 * end of the old lock's range. Move the old lock's 2384 * end to just before the new lock's first and insert 2385 * the new lock after the old lock. 2386 * Might not be done yet, since the new lock could 2387 * overlap further locks with higher ranges. 2388 */ 2389 if (lop->nfslo_end != new_lop->nfslo_first) { 2390 lop->nfslo_end = new_lop->nfslo_first; 2391 modified = 1; 2392 } 2393 ilop = lop; 2394 lop = LIST_NEXT(lop, nfslo_list); 2395 continue; 2396 } 2397 /* 2398 * The final case is where the new lock's range is in the 2399 * middle of the current lock's and splits the current lock 2400 * up. Use *other_lopp to handle the second part of the 2401 * split old lock range. (We are done now.) 2402 * For unlock, we use new_lop as other_lop and tmp, since 2403 * other_lop and new_lop are the same for this case. 2404 * We noted the unlock case above, so we don't need 2405 * new_lop->nfslo_type any longer. 2406 */ 2407 tmp = new_lop->nfslo_first; 2408 if (unlock) { 2409 other_lop = new_lop; 2410 *new_lopp = NULL; 2411 } else { 2412 other_lop = *other_lopp; 2413 *other_lopp = NULL; 2414 } 2415 other_lop->nfslo_first = new_lop->nfslo_end; 2416 other_lop->nfslo_end = lop->nfslo_end; 2417 other_lop->nfslo_type = lop->nfslo_type; 2418 lop->nfslo_end = tmp; 2419 nfscl_insertlock(lp, other_lop, lop, local); 2420 ilop = lop; 2421 modified = 1; 2422 break; 2423 } 2424 ilop = lop; 2425 lop = LIST_NEXT(lop, nfslo_list); 2426 if (lop == NULL) 2427 break; 2428 } 2429 2430 /* 2431 * Insert the new lock in the list at the appropriate place. 2432 */ 2433 if (!unlock) { 2434 nfscl_insertlock(lp, new_lop, ilop, local); 2435 *new_lopp = NULL; 2436 modified = 1; 2437 } 2438 return (modified); 2439} 2440 2441/* 2442 * This function must be run as a kernel thread. 2443 * It does Renew Ops and recovery, when required. 2444 */ 2445APPLESTATIC void 2446nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2447{ 2448 struct nfsclowner *owp, *nowp; 2449 struct nfsclopen *op; 2450 struct nfscllockowner *lp, *nlp; 2451 struct nfscldeleghead dh; 2452 struct nfscldeleg *dp, *ndp; 2453 struct ucred *cred; 2454 u_int32_t clidrev; 2455 int error, cbpathdown, islept, igotlock, ret, clearok; 2456 uint32_t recover_done_time = 0; 2457 time_t mytime; 2458 static time_t prevsec = 0; 2459 struct nfscllockownerfh *lfhp, *nlfhp; 2460 struct nfscllockownerfhhead lfh; 2461 struct nfscllayout *lyp, *nlyp; 2462 struct nfscldevinfo *dip, *ndip; 2463 struct nfscllayouthead rlh; 2464 struct nfsclrecalllayout *recallp; 2465 struct nfsclds *dsp; 2466 2467 cred = newnfs_getcred(); 2468 NFSLOCKCLSTATE(); 2469 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2470 NFSUNLOCKCLSTATE(); 2471 for(;;) { 2472 newnfs_setroot(cred); 2473 cbpathdown = 0; 2474 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2475 /* 2476 * Only allow one recover within 1/2 of the lease 2477 * duration (nfsc_renew). 2478 */ 2479 if (recover_done_time < NFSD_MONOSEC) { 2480 recover_done_time = NFSD_MONOSEC + 2481 clp->nfsc_renew; 2482 NFSCL_DEBUG(1, "Doing recovery..\n"); 2483 nfscl_recover(clp, cred, p); 2484 } else { 2485 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n", 2486 recover_done_time, (intmax_t)NFSD_MONOSEC); 2487 NFSLOCKCLSTATE(); 2488 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2489 NFSUNLOCKCLSTATE(); 2490 } 2491 } 2492 if (clp->nfsc_expire <= NFSD_MONOSEC && 2493 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2494 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2495 clidrev = clp->nfsc_clientidrev; 2496 error = nfsrpc_renew(clp, NULL, cred, p); 2497 if (error == NFSERR_CBPATHDOWN) 2498 cbpathdown = 1; 2499 else if (error == NFSERR_STALECLIENTID || 2500 error == NFSERR_BADSESSION) { 2501 NFSLOCKCLSTATE(); 2502 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2503 NFSUNLOCKCLSTATE(); 2504 } else if (error == NFSERR_EXPIRED) 2505 (void) nfscl_hasexpired(clp, clidrev, p); 2506 } 2507 2508checkdsrenew: 2509 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2510 /* Do renews for any DS sessions. */ 2511 NFSLOCKMNT(clp->nfsc_nmp); 2512 /* Skip first entry, since the MDS is handled above. */ 2513 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2514 if (dsp != NULL) 2515 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2516 while (dsp != NULL) { 2517 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2518 dsp->nfsclds_sess.nfsess_defunct == 0) { 2519 dsp->nfsclds_expire = NFSD_MONOSEC + 2520 clp->nfsc_renew; 2521 NFSUNLOCKMNT(clp->nfsc_nmp); 2522 (void)nfsrpc_renew(clp, dsp, cred, p); 2523 goto checkdsrenew; 2524 } 2525 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2526 } 2527 NFSUNLOCKMNT(clp->nfsc_nmp); 2528 } 2529 2530 TAILQ_INIT(&dh); 2531 NFSLOCKCLSTATE(); 2532 if (cbpathdown) 2533 /* It's a Total Recall! */ 2534 nfscl_totalrecall(clp); 2535 2536 /* 2537 * Now, handle defunct owners. 2538 */ 2539 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2540 if (LIST_EMPTY(&owp->nfsow_open)) { 2541 if (owp->nfsow_defunct != 0) 2542 nfscl_freeopenowner(owp, 0); 2543 } 2544 } 2545 2546 /* 2547 * Do the recall on any delegations. To avoid trouble, always 2548 * come back up here after having slept. 2549 */ 2550 igotlock = 0; 2551tryagain: 2552 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2553 while (dp != NULL) { 2554 ndp = TAILQ_NEXT(dp, nfsdl_list); 2555 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2556 /* 2557 * Wait for outstanding I/O ops to be done. 2558 */ 2559 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2560 if (igotlock) { 2561 nfsv4_unlock(&clp->nfsc_lock, 0); 2562 igotlock = 0; 2563 } 2564 dp->nfsdl_rwlock.nfslock_lock |= 2565 NFSV4LOCK_WANTED; 2566 (void) nfsmsleep(&dp->nfsdl_rwlock, 2567 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2568 NULL); 2569 goto tryagain; 2570 } 2571 while (!igotlock) { 2572 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2573 &islept, NFSCLSTATEMUTEXPTR, NULL); 2574 if (islept) 2575 goto tryagain; 2576 } 2577 NFSUNLOCKCLSTATE(); 2578 newnfs_copycred(&dp->nfsdl_cred, cred); 2579 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2580 NULL, cred, p, 1); 2581 if (!ret) { 2582 nfscl_cleandeleg(dp); 2583 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2584 nfsdl_list); 2585 LIST_REMOVE(dp, nfsdl_hash); 2586 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2587 nfscl_delegcnt--; 2588 newnfsstats.cldelegates--; 2589 } 2590 NFSLOCKCLSTATE(); 2591 } 2592 dp = ndp; 2593 } 2594 2595 /* 2596 * Clear out old delegations, if we are above the high water 2597 * mark. Only clear out ones with no state related to them. 2598 * The tailq list is in LRU order. 2599 */ 2600 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2601 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2602 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2603 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2604 dp->nfsdl_rwlock.nfslock_lock == 0 && 2605 dp->nfsdl_timestamp < NFSD_MONOSEC && 2606 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2607 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2608 clearok = 1; 2609 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2610 op = LIST_FIRST(&owp->nfsow_open); 2611 if (op != NULL) { 2612 clearok = 0; 2613 break; 2614 } 2615 } 2616 if (clearok) { 2617 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2618 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2619 clearok = 0; 2620 break; 2621 } 2622 } 2623 } 2624 if (clearok) { 2625 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2626 LIST_REMOVE(dp, nfsdl_hash); 2627 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2628 nfscl_delegcnt--; 2629 newnfsstats.cldelegates--; 2630 } 2631 } 2632 dp = ndp; 2633 } 2634 if (igotlock) 2635 nfsv4_unlock(&clp->nfsc_lock, 0); 2636 2637 /* 2638 * Do the recall on any layouts. To avoid trouble, always 2639 * come back up here after having slept. 2640 */ 2641 TAILQ_INIT(&rlh); 2642tryagain2: 2643 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2644 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2645 /* 2646 * Wait for outstanding I/O ops to be done. 2647 */ 2648 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2649 (lyp->nfsly_lock.nfslock_lock & 2650 NFSV4LOCK_LOCK) != 0) { 2651 lyp->nfsly_lock.nfslock_lock |= 2652 NFSV4LOCK_WANTED; 2653 (void)nfsmsleep(&lyp->nfsly_lock, 2654 NFSCLSTATEMUTEXPTR, PZERO, "nfslyp", 2655 NULL); 2656 goto tryagain2; 2657 } 2658 /* Move the layout to the recall list. */ 2659 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2660 nfsly_list); 2661 LIST_REMOVE(lyp, nfsly_hash); 2662 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2663 2664 /* Handle any layout commits. */ 2665 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2666 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2667 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2668 NFSUNLOCKCLSTATE(); 2669 NFSCL_DEBUG(3, "do layoutcommit\n"); 2670 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2671 cred, p); 2672 NFSLOCKCLSTATE(); 2673 goto tryagain2; 2674 } 2675 } 2676 } 2677 2678 /* Now, look for stale layouts. */ 2679 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2680 while (lyp != NULL) { 2681 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2682 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2683 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2684 lyp->nfsly_lock.nfslock_usecnt == 0 && 2685 lyp->nfsly_lock.nfslock_lock == 0) { 2686 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2687 nfscl_layoutcnt); 2688 recallp = malloc(sizeof(*recallp), 2689 M_NFSLAYRECALL, M_NOWAIT); 2690 if (recallp == NULL) 2691 break; 2692 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2693 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2694 lyp->nfsly_stateid.seqid, recallp); 2695 } 2696 lyp = nlyp; 2697 } 2698 2699 /* 2700 * Free up any unreferenced device info structures. 2701 */ 2702 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 2703 if (dip->nfsdi_layoutrefs == 0 && 2704 dip->nfsdi_refcnt == 0) { 2705 NFSCL_DEBUG(4, "freeing devinfo\n"); 2706 LIST_REMOVE(dip, nfsdi_list); 2707 nfscl_freedevinfo(dip); 2708 } 2709 } 2710 NFSUNLOCKCLSTATE(); 2711 2712 /* Do layout return(s), as required. */ 2713 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 2714 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 2715 NFSCL_DEBUG(4, "ret layout\n"); 2716 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 2717 nfscl_freelayout(lyp); 2718 } 2719 2720 /* 2721 * Delegreturn any delegations cleaned out or recalled. 2722 */ 2723 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2724 newnfs_copycred(&dp->nfsdl_cred, cred); 2725 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2726 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2727 FREE((caddr_t)dp, M_NFSCLDELEG); 2728 } 2729 2730 SLIST_INIT(&lfh); 2731 /* 2732 * Call nfscl_cleanupkext() once per second to check for 2733 * open/lock owners where the process has exited. 2734 */ 2735 mytime = NFSD_MONOSEC; 2736 if (prevsec != mytime) { 2737 prevsec = mytime; 2738 nfscl_cleanupkext(clp, &lfh); 2739 } 2740 2741 /* 2742 * Do a ReleaseLockOwner for all lock owners where the 2743 * associated process no longer exists, as found by 2744 * nfscl_cleanupkext(). 2745 */ 2746 newnfs_setroot(cred); 2747 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2748 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2749 nlp) { 2750 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2751 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2752 p); 2753 nfscl_freelockowner(lp, 0); 2754 } 2755 free(lfhp, M_TEMP); 2756 } 2757 SLIST_INIT(&lfh); 2758 2759 NFSLOCKCLSTATE(); 2760 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2761 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2762 hz); 2763 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2764 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2765 NFSUNLOCKCLSTATE(); 2766 NFSFREECRED(cred); 2767 wakeup((caddr_t)clp); 2768 return; 2769 } 2770 NFSUNLOCKCLSTATE(); 2771 } 2772} 2773 2774/* 2775 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 2776 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 2777 */ 2778APPLESTATIC void 2779nfscl_initiate_recovery(struct nfsclclient *clp) 2780{ 2781 2782 if (clp == NULL) 2783 return; 2784 NFSLOCKCLSTATE(); 2785 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2786 NFSUNLOCKCLSTATE(); 2787 wakeup((caddr_t)clp); 2788} 2789 2790/* 2791 * Dump out the state stuff for debugging. 2792 */ 2793APPLESTATIC void 2794nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2795 int lockowner, int locks) 2796{ 2797 struct nfsclclient *clp; 2798 struct nfsclowner *owp; 2799 struct nfsclopen *op; 2800 struct nfscllockowner *lp; 2801 struct nfscllock *lop; 2802 struct nfscldeleg *dp; 2803 2804 clp = nmp->nm_clp; 2805 if (clp == NULL) { 2806 printf("nfscl dumpstate NULL clp\n"); 2807 return; 2808 } 2809 NFSLOCKCLSTATE(); 2810 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2811 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2812 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2813 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2814 owp->nfsow_owner[0], owp->nfsow_owner[1], 2815 owp->nfsow_owner[2], owp->nfsow_owner[3], 2816 owp->nfsow_seqid); 2817 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2818 if (opens) 2819 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2820 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2821 op->nfso_stateid.other[2], op->nfso_opencnt, 2822 op->nfso_fh[12]); 2823 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2824 if (lockowner) 2825 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2826 lp->nfsl_owner[0], lp->nfsl_owner[1], 2827 lp->nfsl_owner[2], lp->nfsl_owner[3], 2828 lp->nfsl_seqid, 2829 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2830 lp->nfsl_stateid.other[2]); 2831 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2832 if (locks) 2833#ifdef __FreeBSD__ 2834 printf("lck typ=%d fst=%ju end=%ju\n", 2835 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2836 (intmax_t)lop->nfslo_end); 2837#else 2838 printf("lck typ=%d fst=%qd end=%qd\n", 2839 lop->nfslo_type, lop->nfslo_first, 2840 lop->nfslo_end); 2841#endif 2842 } 2843 } 2844 } 2845 } 2846 } 2847 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2848 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2849 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2850 owp->nfsow_owner[0], owp->nfsow_owner[1], 2851 owp->nfsow_owner[2], owp->nfsow_owner[3], 2852 owp->nfsow_seqid); 2853 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2854 if (opens) 2855 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2856 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2857 op->nfso_stateid.other[2], op->nfso_opencnt, 2858 op->nfso_fh[12]); 2859 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2860 if (lockowner) 2861 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2862 lp->nfsl_owner[0], lp->nfsl_owner[1], 2863 lp->nfsl_owner[2], lp->nfsl_owner[3], 2864 lp->nfsl_seqid, 2865 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2866 lp->nfsl_stateid.other[2]); 2867 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2868 if (locks) 2869#ifdef __FreeBSD__ 2870 printf("lck typ=%d fst=%ju end=%ju\n", 2871 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2872 (intmax_t)lop->nfslo_end); 2873#else 2874 printf("lck typ=%d fst=%qd end=%qd\n", 2875 lop->nfslo_type, lop->nfslo_first, 2876 lop->nfslo_end); 2877#endif 2878 } 2879 } 2880 } 2881 } 2882 NFSUNLOCKCLSTATE(); 2883} 2884 2885/* 2886 * Check for duplicate open owners and opens. 2887 * (Only used as a diagnostic aid.) 2888 */ 2889APPLESTATIC void 2890nfscl_dupopen(vnode_t vp, int dupopens) 2891{ 2892 struct nfsclclient *clp; 2893 struct nfsclowner *owp, *owp2; 2894 struct nfsclopen *op, *op2; 2895 struct nfsfh *nfhp; 2896 2897 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2898 if (clp == NULL) { 2899 printf("nfscl dupopen NULL clp\n"); 2900 return; 2901 } 2902 nfhp = VTONFS(vp)->n_fhp; 2903 NFSLOCKCLSTATE(); 2904 2905 /* 2906 * First, search for duplicate owners. 2907 * These should never happen! 2908 */ 2909 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2910 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2911 if (owp != owp2 && 2912 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2913 NFSV4CL_LOCKNAMELEN)) { 2914 NFSUNLOCKCLSTATE(); 2915 printf("DUP OWNER\n"); 2916 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2917 return; 2918 } 2919 } 2920 } 2921 2922 /* 2923 * Now, search for duplicate stateids. 2924 * These shouldn't happen, either. 2925 */ 2926 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2927 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2928 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2929 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2930 if (op != op2 && 2931 (op->nfso_stateid.other[0] != 0 || 2932 op->nfso_stateid.other[1] != 0 || 2933 op->nfso_stateid.other[2] != 0) && 2934 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 2935 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 2936 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 2937 NFSUNLOCKCLSTATE(); 2938 printf("DUP STATEID\n"); 2939 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 2940 0); 2941 return; 2942 } 2943 } 2944 } 2945 } 2946 } 2947 2948 /* 2949 * Now search for duplicate opens. 2950 * Duplicate opens for the same owner 2951 * should never occur. Other duplicates are 2952 * possible and are checked for if "dupopens" 2953 * is true. 2954 */ 2955 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2956 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2957 if (nfhp->nfh_len == op2->nfso_fhlen && 2958 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 2959 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2960 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2961 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 2962 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 2963 (!NFSBCMP(op->nfso_own->nfsow_owner, 2964 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 2965 dupopens)) { 2966 if (!NFSBCMP(op->nfso_own->nfsow_owner, 2967 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 2968 NFSUNLOCKCLSTATE(); 2969 printf("BADDUP OPEN\n"); 2970 } else { 2971 NFSUNLOCKCLSTATE(); 2972 printf("DUP OPEN\n"); 2973 } 2974 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 2975 0, 0); 2976 return; 2977 } 2978 } 2979 } 2980 } 2981 } 2982 } 2983 NFSUNLOCKCLSTATE(); 2984} 2985 2986/* 2987 * During close, find an open that needs to be dereferenced and 2988 * dereference it. If there are no more opens for this file, 2989 * log a message to that effect. 2990 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 2991 * on the file's vnode. 2992 * This is the safe way, since it is difficult to identify 2993 * which open the close is for and I/O can be performed after the 2994 * close(2) system call when a file is mmap'd. 2995 * If it returns 0 for success, there will be a referenced 2996 * clp returned via clpp. 2997 */ 2998APPLESTATIC int 2999nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 3000{ 3001 struct nfsclclient *clp; 3002 struct nfsclowner *owp; 3003 struct nfsclopen *op; 3004 struct nfscldeleg *dp; 3005 struct nfsfh *nfhp; 3006 int error, notdecr; 3007 3008 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3009 if (error) 3010 return (error); 3011 *clpp = clp; 3012 3013 nfhp = VTONFS(vp)->n_fhp; 3014 notdecr = 1; 3015 NFSLOCKCLSTATE(); 3016 /* 3017 * First, look for one under a delegation that was locally issued 3018 * and just decrement the opencnt for it. Since all my Opens against 3019 * the server are DENY_NONE, I don't see a problem with hanging 3020 * onto them. (It is much easier to use one of the extant Opens 3021 * that I already have on the server when a Delegation is recalled 3022 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3023 */ 3024 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3025 if (dp != NULL) { 3026 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3027 op = LIST_FIRST(&owp->nfsow_open); 3028 if (op != NULL) { 3029 /* 3030 * Since a delegation is for a file, there 3031 * should never be more than one open for 3032 * each openowner. 3033 */ 3034 if (LIST_NEXT(op, nfso_list) != NULL) 3035 panic("nfscdeleg opens"); 3036 if (notdecr && op->nfso_opencnt > 0) { 3037 notdecr = 0; 3038 op->nfso_opencnt--; 3039 break; 3040 } 3041 } 3042 } 3043 } 3044 3045 /* Now process the opens against the server. */ 3046 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3047 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3048 if (op->nfso_fhlen == nfhp->nfh_len && 3049 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3050 nfhp->nfh_len)) { 3051 /* Found an open, decrement cnt if possible */ 3052 if (notdecr && op->nfso_opencnt > 0) { 3053 notdecr = 0; 3054 op->nfso_opencnt--; 3055 } 3056 /* 3057 * There are more opens, so just return. 3058 */ 3059 if (op->nfso_opencnt > 0) { 3060 NFSUNLOCKCLSTATE(); 3061 return (0); 3062 } 3063 } 3064 } 3065 } 3066 NFSUNLOCKCLSTATE(); 3067 if (notdecr) 3068 printf("nfscl: never fnd open\n"); 3069 return (0); 3070} 3071 3072APPLESTATIC int 3073nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3074{ 3075 struct nfsclclient *clp; 3076 struct nfsclowner *owp, *nowp; 3077 struct nfsclopen *op; 3078 struct nfscldeleg *dp; 3079 struct nfsfh *nfhp; 3080 int error; 3081 3082 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3083 if (error) 3084 return (error); 3085 *clpp = clp; 3086 3087 nfhp = VTONFS(vp)->n_fhp; 3088 NFSLOCKCLSTATE(); 3089 /* 3090 * First get rid of the local Open structures, which should be no 3091 * longer in use. 3092 */ 3093 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3094 if (dp != NULL) { 3095 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3096 op = LIST_FIRST(&owp->nfsow_open); 3097 if (op != NULL) { 3098 KASSERT((op->nfso_opencnt == 0), 3099 ("nfscl: bad open cnt on deleg")); 3100 nfscl_freeopen(op, 1); 3101 } 3102 nfscl_freeopenowner(owp, 1); 3103 } 3104 } 3105 3106 /* Return any layouts marked return on close. */ 3107 nfscl_retoncloselayout(clp, nfhp->nfh_fh, nfhp->nfh_len); 3108 3109 /* Now process the opens against the server. */ 3110lookformore: 3111 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3112 op = LIST_FIRST(&owp->nfsow_open); 3113 while (op != NULL) { 3114 if (op->nfso_fhlen == nfhp->nfh_len && 3115 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3116 nfhp->nfh_len)) { 3117 /* Found an open, close it. */ 3118 KASSERT((op->nfso_opencnt == 0), 3119 ("nfscl: bad open cnt on server")); 3120 NFSUNLOCKCLSTATE(); 3121 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 3122 p); 3123 NFSLOCKCLSTATE(); 3124 goto lookformore; 3125 } 3126 op = LIST_NEXT(op, nfso_list); 3127 } 3128 } 3129 NFSUNLOCKCLSTATE(); 3130 return (0); 3131} 3132 3133/* 3134 * Return all delegations on this client. 3135 * (Must be called with client sleep lock.) 3136 */ 3137static void 3138nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3139{ 3140 struct nfscldeleg *dp, *ndp; 3141 struct ucred *cred; 3142 3143 cred = newnfs_getcred(); 3144 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3145 nfscl_cleandeleg(dp); 3146 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3147 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3148 } 3149 NFSFREECRED(cred); 3150} 3151 3152/* 3153 * Do a callback RPC. 3154 */ 3155APPLESTATIC void 3156nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3157{ 3158 int clist, gotseq_ok, i, j, k, op, rcalls; 3159 u_int32_t *tl; 3160 struct nfsclclient *clp; 3161 struct nfscldeleg *dp = NULL; 3162 int numops, taglen = -1, error = 0, trunc; 3163 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3164 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3165 vnode_t vp = NULL; 3166 struct nfsnode *np; 3167 struct vattr va; 3168 struct nfsfh *nfhp; 3169 mount_t mp; 3170 nfsattrbit_t attrbits, rattrbits; 3171 nfsv4stateid_t stateid; 3172 uint32_t seqid, slotid = 0, highslot, cachethis; 3173 uint8_t sessionid[NFSX_V4SESSIONID]; 3174 struct mbuf *rep; 3175 struct nfscllayout *lyp; 3176 uint64_t filesid[2], len, off; 3177 int changed, gotone, laytype, recalltype; 3178 uint32_t iomode; 3179 struct nfsclrecalllayout *recallp = NULL; 3180 struct nfsclsession *tsep; 3181 3182 gotseq_ok = 0; 3183 nfsrvd_rephead(nd); 3184 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3185 taglen = fxdr_unsigned(int, *tl); 3186 if (taglen < 0) { 3187 error = EBADRPC; 3188 goto nfsmout; 3189 } 3190 if (taglen <= NFSV4_SMALLSTR) 3191 tagstr = tag; 3192 else 3193 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3194 error = nfsrv_mtostr(nd, tagstr, taglen); 3195 if (error) { 3196 if (taglen > NFSV4_SMALLSTR) 3197 free(tagstr, M_TEMP); 3198 taglen = -1; 3199 goto nfsmout; 3200 } 3201 (void) nfsm_strtom(nd, tag, taglen); 3202 if (taglen > NFSV4_SMALLSTR) { 3203 free(tagstr, M_TEMP); 3204 } 3205 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3206 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3207 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3208 if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION) 3209 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3210 cbident = fxdr_unsigned(u_int32_t, *tl++); 3211 if (nd->nd_repstat) 3212 numops = 0; 3213 else 3214 numops = fxdr_unsigned(int, *tl); 3215 /* 3216 * Loop around doing the sub ops. 3217 */ 3218 for (i = 0; i < numops; i++) { 3219 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3220 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3221 *repp++ = *tl; 3222 op = fxdr_unsigned(int, *tl); 3223 if (op < NFSV4OP_CBGETATTR || 3224 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3225 (op > NFSV4OP_CBNOTIFYDEVID && 3226 minorvers == NFSV41_MINORVERSION)) { 3227 nd->nd_repstat = NFSERR_OPILLEGAL; 3228 *repp = nfscl_errmap(nd, minorvers); 3229 retops++; 3230 break; 3231 } 3232 nd->nd_procnum = op; 3233 if (op < NFSV4OP_CBNOPS) 3234 newnfsstats.cbrpccnt[nd->nd_procnum]++; 3235 switch (op) { 3236 case NFSV4OP_CBGETATTR: 3237 NFSCL_DEBUG(4, "cbgetattr\n"); 3238 mp = NULL; 3239 vp = NULL; 3240 error = nfsm_getfh(nd, &nfhp); 3241 if (!error) 3242 error = nfsrv_getattrbits(nd, &attrbits, 3243 NULL, NULL); 3244 if (error == 0 && i == 0 && 3245 minorvers != NFSV4_MINORVERSION) 3246 error = NFSERR_OPNOTINSESS; 3247 if (!error) { 3248 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3249 &clp); 3250 if (mp == NULL) 3251 error = NFSERR_SERVERFAULT; 3252 } 3253 if (!error) { 3254 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3255 nfhp->nfh_len, p, &np); 3256 if (!error) 3257 vp = NFSTOV(np); 3258 } 3259 if (!error) { 3260 NFSZERO_ATTRBIT(&rattrbits); 3261 NFSLOCKCLSTATE(); 3262 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3263 nfhp->nfh_len); 3264 if (dp != NULL) { 3265 if (NFSISSET_ATTRBIT(&attrbits, 3266 NFSATTRBIT_SIZE)) { 3267 if (vp != NULL) 3268 va.va_size = np->n_size; 3269 else 3270 va.va_size = 3271 dp->nfsdl_size; 3272 NFSSETBIT_ATTRBIT(&rattrbits, 3273 NFSATTRBIT_SIZE); 3274 } 3275 if (NFSISSET_ATTRBIT(&attrbits, 3276 NFSATTRBIT_CHANGE)) { 3277 va.va_filerev = 3278 dp->nfsdl_change; 3279 if (vp == NULL || 3280 (np->n_flag & NDELEGMOD)) 3281 va.va_filerev++; 3282 NFSSETBIT_ATTRBIT(&rattrbits, 3283 NFSATTRBIT_CHANGE); 3284 } 3285 } else 3286 error = NFSERR_SERVERFAULT; 3287 NFSUNLOCKCLSTATE(); 3288 } 3289 if (vp != NULL) 3290 vrele(vp); 3291 if (mp != NULL) 3292 vfs_unbusy(mp); 3293 if (nfhp != NULL) 3294 FREE((caddr_t)nfhp, M_NFSFH); 3295 if (!error) 3296 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3297 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3298 (uint64_t)0); 3299 break; 3300 case NFSV4OP_CBRECALL: 3301 NFSCL_DEBUG(4, "cbrecall\n"); 3302 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3303 NFSX_UNSIGNED); 3304 stateid.seqid = *tl++; 3305 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3306 NFSX_STATEIDOTHER); 3307 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3308 trunc = fxdr_unsigned(int, *tl); 3309 error = nfsm_getfh(nd, &nfhp); 3310 if (error == 0 && i == 0 && 3311 minorvers != NFSV4_MINORVERSION) 3312 error = NFSERR_OPNOTINSESS; 3313 if (!error) { 3314 NFSLOCKCLSTATE(); 3315 if (minorvers == NFSV4_MINORVERSION) 3316 clp = nfscl_getclnt(cbident); 3317 else 3318 clp = nfscl_getclntsess(sessionid); 3319 if (clp != NULL) { 3320 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3321 nfhp->nfh_len); 3322 if (dp != NULL && (dp->nfsdl_flags & 3323 NFSCLDL_DELEGRET) == 0) { 3324 dp->nfsdl_flags |= 3325 NFSCLDL_RECALL; 3326 wakeup((caddr_t)clp); 3327 } 3328 } else { 3329 error = NFSERR_SERVERFAULT; 3330 } 3331 NFSUNLOCKCLSTATE(); 3332 } 3333 if (nfhp != NULL) 3334 FREE((caddr_t)nfhp, M_NFSFH); 3335 break; 3336 case NFSV4OP_CBLAYOUTRECALL: 3337 NFSCL_DEBUG(4, "cblayrec\n"); 3338 nfhp = NULL; 3339 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3340 laytype = fxdr_unsigned(int, *tl++); 3341 iomode = fxdr_unsigned(uint32_t, *tl++); 3342 if (newnfs_true == *tl++) 3343 changed = 1; 3344 else 3345 changed = 0; 3346 recalltype = fxdr_unsigned(int, *tl); 3347 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3348 M_WAITOK); 3349 if (laytype != NFSLAYOUT_NFSV4_1_FILES) 3350 error = NFSERR_NOMATCHLAYOUT; 3351 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3352 error = nfsm_getfh(nd, &nfhp); 3353 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3354 if (error != 0) 3355 goto nfsmout; 3356 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3357 NFSX_STATEID); 3358 off = fxdr_hyper(tl); tl += 2; 3359 len = fxdr_hyper(tl); tl += 2; 3360 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3361 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3362 if (minorvers == NFSV4_MINORVERSION) 3363 error = NFSERR_NOTSUPP; 3364 else if (i == 0) 3365 error = NFSERR_OPNOTINSESS; 3366 if (error == 0) { 3367 NFSLOCKCLSTATE(); 3368 clp = nfscl_getclntsess(sessionid); 3369 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3370 if (clp != NULL) { 3371 lyp = nfscl_findlayout(clp, 3372 nfhp->nfh_fh, 3373 nfhp->nfh_len); 3374 NFSCL_DEBUG(4, "cblyp=%p\n", 3375 lyp); 3376 if (lyp != NULL && 3377 (lyp->nfsly_flags & 3378 NFSLY_FILES) != 0 && 3379 !NFSBCMP(stateid.other, 3380 lyp->nfsly_stateid.other, 3381 NFSX_STATEIDOTHER)) { 3382 error = 3383 nfscl_layoutrecall( 3384 recalltype, 3385 lyp, iomode, off, 3386 len, stateid.seqid, 3387 recallp); 3388 recallp = NULL; 3389 wakeup(clp); 3390 NFSCL_DEBUG(4, 3391 "aft layrcal=%d\n", 3392 error); 3393 } else 3394 error = 3395 NFSERR_NOMATCHLAYOUT; 3396 } else 3397 error = NFSERR_NOMATCHLAYOUT; 3398 NFSUNLOCKCLSTATE(); 3399 } 3400 free(nfhp, M_NFSFH); 3401 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3402 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3403 filesid[0] = fxdr_hyper(tl); tl += 2; 3404 filesid[1] = fxdr_hyper(tl); tl += 2; 3405 gotone = 0; 3406 NFSLOCKCLSTATE(); 3407 clp = nfscl_getclntsess(sessionid); 3408 if (clp != NULL) { 3409 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3410 nfsly_list) { 3411 if (lyp->nfsly_filesid[0] == 3412 filesid[0] && 3413 lyp->nfsly_filesid[1] == 3414 filesid[1]) { 3415 error = 3416 nfscl_layoutrecall( 3417 recalltype, 3418 lyp, iomode, 0, 3419 UINT64_MAX, 3420 lyp->nfsly_stateid.seqid, 3421 recallp); 3422 recallp = NULL; 3423 gotone = 1; 3424 } 3425 } 3426 if (gotone != 0) 3427 wakeup(clp); 3428 else 3429 error = NFSERR_NOMATCHLAYOUT; 3430 } else 3431 error = NFSERR_NOMATCHLAYOUT; 3432 NFSUNLOCKCLSTATE(); 3433 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3434 gotone = 0; 3435 NFSLOCKCLSTATE(); 3436 clp = nfscl_getclntsess(sessionid); 3437 if (clp != NULL) { 3438 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3439 nfsly_list) { 3440 error = nfscl_layoutrecall( 3441 recalltype, lyp, iomode, 0, 3442 UINT64_MAX, 3443 lyp->nfsly_stateid.seqid, 3444 recallp); 3445 recallp = NULL; 3446 gotone = 1; 3447 } 3448 if (gotone != 0) 3449 wakeup(clp); 3450 else 3451 error = NFSERR_NOMATCHLAYOUT; 3452 } else 3453 error = NFSERR_NOMATCHLAYOUT; 3454 NFSUNLOCKCLSTATE(); 3455 } else 3456 error = NFSERR_NOMATCHLAYOUT; 3457 if (recallp != NULL) { 3458 free(recallp, M_NFSLAYRECALL); 3459 recallp = NULL; 3460 } 3461 break; 3462 case NFSV4OP_CBSEQUENCE: 3463 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3464 5 * NFSX_UNSIGNED); 3465 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3466 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3467 seqid = fxdr_unsigned(uint32_t, *tl++); 3468 slotid = fxdr_unsigned(uint32_t, *tl++); 3469 highslot = fxdr_unsigned(uint32_t, *tl++); 3470 cachethis = *tl++; 3471 /* Throw away the referring call stuff. */ 3472 clist = fxdr_unsigned(int, *tl); 3473 for (j = 0; j < clist; j++) { 3474 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3475 NFSX_UNSIGNED); 3476 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3477 rcalls = fxdr_unsigned(int, *tl); 3478 for (k = 0; k < rcalls; k++) { 3479 NFSM_DISSECT(tl, uint32_t *, 3480 2 * NFSX_UNSIGNED); 3481 } 3482 } 3483 NFSLOCKCLSTATE(); 3484 if (i == 0) { 3485 clp = nfscl_getclntsess(sessionid); 3486 if (clp == NULL) 3487 error = NFSERR_SERVERFAULT; 3488 } else 3489 error = NFSERR_SEQUENCEPOS; 3490 if (error == 0) { 3491 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3492 error = nfsv4_seqsession(seqid, slotid, 3493 highslot, tsep->nfsess_cbslots, &rep, 3494 tsep->nfsess_backslots); 3495 } 3496 NFSUNLOCKCLSTATE(); 3497 if (error == 0) { 3498 gotseq_ok = 1; 3499 if (rep != NULL) { 3500 NFSCL_DEBUG(4, "Got cbretry\n"); 3501 m_freem(nd->nd_mreq); 3502 nd->nd_mreq = rep; 3503 rep = NULL; 3504 goto out; 3505 } 3506 NFSM_BUILD(tl, uint32_t *, 3507 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3508 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3509 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3510 *tl++ = txdr_unsigned(seqid); 3511 *tl++ = txdr_unsigned(slotid); 3512 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3513 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3514 } 3515 break; 3516 default: 3517 if (i == 0 && minorvers == NFSV41_MINORVERSION) 3518 error = NFSERR_OPNOTINSESS; 3519 else { 3520 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3521 error = NFSERR_NOTSUPP; 3522 } 3523 break; 3524 }; 3525 if (error) { 3526 if (error == EBADRPC || error == NFSERR_BADXDR) { 3527 nd->nd_repstat = NFSERR_BADXDR; 3528 } else { 3529 nd->nd_repstat = error; 3530 } 3531 error = 0; 3532 } 3533 retops++; 3534 if (nd->nd_repstat) { 3535 *repp = nfscl_errmap(nd, minorvers); 3536 break; 3537 } else 3538 *repp = 0; /* NFS4_OK */ 3539 } 3540nfsmout: 3541 if (recallp != NULL) 3542 free(recallp, M_NFSLAYRECALL); 3543 if (error) { 3544 if (error == EBADRPC || error == NFSERR_BADXDR) 3545 nd->nd_repstat = NFSERR_BADXDR; 3546 else 3547 printf("nfsv4 comperr1=%d\n", error); 3548 } 3549 if (taglen == -1) { 3550 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3551 *tl++ = 0; 3552 *tl = 0; 3553 } else { 3554 *retopsp = txdr_unsigned(retops); 3555 } 3556 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3557out: 3558 if (gotseq_ok != 0) { 3559 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3560 NFSLOCKCLSTATE(); 3561 clp = nfscl_getclntsess(sessionid); 3562 if (clp != NULL) { 3563 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3564 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3565 NFSERR_OK, &rep); 3566 NFSUNLOCKCLSTATE(); 3567 } else { 3568 NFSUNLOCKCLSTATE(); 3569 m_freem(rep); 3570 } 3571 } 3572} 3573 3574/* 3575 * Generate the next cbident value. Basically just increment a static value 3576 * and then check that it isn't already in the list, if it has wrapped around. 3577 */ 3578static u_int32_t 3579nfscl_nextcbident(void) 3580{ 3581 struct nfsclclient *clp; 3582 int matched; 3583 static u_int32_t nextcbident = 0; 3584 static int haswrapped = 0; 3585 3586 nextcbident++; 3587 if (nextcbident == 0) 3588 haswrapped = 1; 3589 if (haswrapped) { 3590 /* 3591 * Search the clientid list for one already using this cbident. 3592 */ 3593 do { 3594 matched = 0; 3595 NFSLOCKCLSTATE(); 3596 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3597 if (clp->nfsc_cbident == nextcbident) { 3598 matched = 1; 3599 break; 3600 } 3601 } 3602 NFSUNLOCKCLSTATE(); 3603 if (matched == 1) 3604 nextcbident++; 3605 } while (matched); 3606 } 3607 return (nextcbident); 3608} 3609 3610/* 3611 * Get the mount point related to a given cbident or session and busy it. 3612 */ 3613static mount_t 3614nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3615 struct nfsclclient **clpp) 3616{ 3617 struct nfsclclient *clp; 3618 mount_t mp; 3619 int error; 3620 struct nfsclsession *tsep; 3621 3622 *clpp = NULL; 3623 NFSLOCKCLSTATE(); 3624 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3625 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3626 if (minorvers == NFSV4_MINORVERSION) { 3627 if (clp->nfsc_cbident == cbident) 3628 break; 3629 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3630 NFSX_V4SESSIONID)) 3631 break; 3632 } 3633 if (clp == NULL) { 3634 NFSUNLOCKCLSTATE(); 3635 return (NULL); 3636 } 3637 mp = clp->nfsc_nmp->nm_mountp; 3638 vfs_ref(mp); 3639 NFSUNLOCKCLSTATE(); 3640 error = vfs_busy(mp, 0); 3641 vfs_rel(mp); 3642 if (error != 0) 3643 return (NULL); 3644 *clpp = clp; 3645 return (mp); 3646} 3647 3648/* 3649 * Get the clientid pointer related to a given cbident. 3650 */ 3651static struct nfsclclient * 3652nfscl_getclnt(u_int32_t cbident) 3653{ 3654 struct nfsclclient *clp; 3655 3656 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3657 if (clp->nfsc_cbident == cbident) 3658 break; 3659 return (clp); 3660} 3661 3662/* 3663 * Get the clientid pointer related to a given sessionid. 3664 */ 3665static struct nfsclclient * 3666nfscl_getclntsess(uint8_t *sessionid) 3667{ 3668 struct nfsclclient *clp; 3669 struct nfsclsession *tsep; 3670 3671 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3672 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3673 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3674 NFSX_V4SESSIONID)) 3675 break; 3676 } 3677 return (clp); 3678} 3679 3680/* 3681 * Search for a lock conflict locally on the client. A conflict occurs if 3682 * - not same owner and overlapping byte range and at least one of them is 3683 * a write lock or this is an unlock. 3684 */ 3685static int 3686nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3687 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3688 struct nfscllock **lopp) 3689{ 3690 struct nfsclowner *owp; 3691 struct nfsclopen *op; 3692 int ret; 3693 3694 if (dp != NULL) { 3695 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3696 if (ret) 3697 return (ret); 3698 } 3699 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3700 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3701 if (op->nfso_fhlen == fhlen && 3702 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3703 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3704 own, lopp); 3705 if (ret) 3706 return (ret); 3707 } 3708 } 3709 } 3710 return (0); 3711} 3712 3713static int 3714nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3715 u_int8_t *own, struct nfscllock **lopp) 3716{ 3717 struct nfscllockowner *lp; 3718 struct nfscllock *lop; 3719 3720 LIST_FOREACH(lp, lhp, nfsl_list) { 3721 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3722 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3723 if (lop->nfslo_first >= nlop->nfslo_end) 3724 break; 3725 if (lop->nfslo_end <= nlop->nfslo_first) 3726 continue; 3727 if (lop->nfslo_type == F_WRLCK || 3728 nlop->nfslo_type == F_WRLCK || 3729 nlop->nfslo_type == F_UNLCK) { 3730 if (lopp != NULL) 3731 *lopp = lop; 3732 return (NFSERR_DENIED); 3733 } 3734 } 3735 } 3736 } 3737 return (0); 3738} 3739 3740/* 3741 * Check for a local conflicting lock. 3742 */ 3743APPLESTATIC int 3744nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3745 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3746{ 3747 struct nfscllock *lop, nlck; 3748 struct nfscldeleg *dp; 3749 struct nfsnode *np; 3750 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3751 int error; 3752 3753 nlck.nfslo_type = fl->l_type; 3754 nlck.nfslo_first = off; 3755 if (len == NFS64BITSSET) { 3756 nlck.nfslo_end = NFS64BITSSET; 3757 } else { 3758 nlck.nfslo_end = off + len; 3759 if (nlck.nfslo_end <= nlck.nfslo_first) 3760 return (NFSERR_INVAL); 3761 } 3762 np = VTONFS(vp); 3763 nfscl_filllockowner(id, own, flags); 3764 NFSLOCKCLSTATE(); 3765 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3766 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3767 &nlck, own, dp, &lop); 3768 if (error != 0) { 3769 fl->l_whence = SEEK_SET; 3770 fl->l_start = lop->nfslo_first; 3771 if (lop->nfslo_end == NFS64BITSSET) 3772 fl->l_len = 0; 3773 else 3774 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3775 fl->l_pid = (pid_t)0; 3776 fl->l_type = lop->nfslo_type; 3777 error = -1; /* no RPC required */ 3778 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3779 fl->l_type == F_RDLCK)) { 3780 /* 3781 * The delegation ensures that there isn't a conflicting 3782 * lock on the server, so return -1 to indicate an RPC 3783 * isn't required. 3784 */ 3785 fl->l_type = F_UNLCK; 3786 error = -1; 3787 } 3788 NFSUNLOCKCLSTATE(); 3789 return (error); 3790} 3791 3792/* 3793 * Handle Recall of a delegation. 3794 * The clp must be exclusive locked when this is called. 3795 */ 3796static int 3797nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3798 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3799 int called_from_renewthread) 3800{ 3801 struct nfsclowner *owp, *lowp, *nowp; 3802 struct nfsclopen *op, *lop; 3803 struct nfscllockowner *lp; 3804 struct nfscllock *lckp; 3805 struct nfsnode *np; 3806 int error = 0, ret, gotvp = 0; 3807 3808 if (vp == NULL) { 3809 /* 3810 * First, get a vnode for the file. This is needed to do RPCs. 3811 */ 3812 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3813 dp->nfsdl_fhlen, p, &np); 3814 if (ret) { 3815 /* 3816 * File isn't open, so nothing to move over to the 3817 * server. 3818 */ 3819 return (0); 3820 } 3821 vp = NFSTOV(np); 3822 gotvp = 1; 3823 } else { 3824 np = VTONFS(vp); 3825 } 3826 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3827 3828 /* 3829 * Ok, if it's a write delegation, flush data to the server, so 3830 * that close/open consistency is retained. 3831 */ 3832 ret = 0; 3833 NFSLOCKNODE(np); 3834 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3835 np->n_flag |= NDELEGRECALL; 3836 NFSUNLOCKNODE(np); 3837 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1, 3838 called_from_renewthread); 3839 NFSLOCKNODE(np); 3840 np->n_flag &= ~NDELEGRECALL; 3841 } 3842 NFSINVALATTRCACHE(np); 3843 NFSUNLOCKNODE(np); 3844 if (ret == EIO && called_from_renewthread != 0) { 3845 /* 3846 * If the flush failed with EIO for the renew thread, 3847 * return now, so that the dirty buffer will be flushed 3848 * later. 3849 */ 3850 if (gotvp != 0) 3851 vrele(vp); 3852 return (ret); 3853 } 3854 3855 /* 3856 * Now, for each openowner with opens issued locally, move them 3857 * over to state against the server. 3858 */ 3859 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3860 lop = LIST_FIRST(&lowp->nfsow_open); 3861 if (lop != NULL) { 3862 if (LIST_NEXT(lop, nfso_list) != NULL) 3863 panic("nfsdlg mult opens"); 3864 /* 3865 * Look for the same openowner against the server. 3866 */ 3867 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3868 if (!NFSBCMP(lowp->nfsow_owner, 3869 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3870 newnfs_copycred(&dp->nfsdl_cred, cred); 3871 ret = nfscl_moveopen(vp, clp, nmp, lop, 3872 owp, dp, cred, p); 3873 if (ret == NFSERR_STALECLIENTID || 3874 ret == NFSERR_STALEDONTRECOVER || 3875 ret == NFSERR_BADSESSION) { 3876 if (gotvp) 3877 vrele(vp); 3878 return (ret); 3879 } 3880 if (ret) { 3881 nfscl_freeopen(lop, 1); 3882 if (!error) 3883 error = ret; 3884 } 3885 break; 3886 } 3887 } 3888 3889 /* 3890 * If no openowner found, create one and get an open 3891 * for it. 3892 */ 3893 if (owp == NULL) { 3894 MALLOC(nowp, struct nfsclowner *, 3895 sizeof (struct nfsclowner), M_NFSCLOWNER, 3896 M_WAITOK); 3897 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3898 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3899 dp->nfsdl_fhlen, NULL); 3900 newnfs_copycred(&dp->nfsdl_cred, cred); 3901 ret = nfscl_moveopen(vp, clp, nmp, lop, 3902 owp, dp, cred, p); 3903 if (ret) { 3904 nfscl_freeopenowner(owp, 0); 3905 if (ret == NFSERR_STALECLIENTID || 3906 ret == NFSERR_STALEDONTRECOVER || 3907 ret == NFSERR_BADSESSION) { 3908 if (gotvp) 3909 vrele(vp); 3910 return (ret); 3911 } 3912 if (ret) { 3913 nfscl_freeopen(lop, 1); 3914 if (!error) 3915 error = ret; 3916 } 3917 } 3918 } 3919 } 3920 } 3921 3922 /* 3923 * Now, get byte range locks for any locks done locally. 3924 */ 3925 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 3926 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 3927 newnfs_copycred(&dp->nfsdl_cred, cred); 3928 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 3929 if (ret == NFSERR_STALESTATEID || 3930 ret == NFSERR_STALEDONTRECOVER || 3931 ret == NFSERR_STALECLIENTID || 3932 ret == NFSERR_BADSESSION) { 3933 if (gotvp) 3934 vrele(vp); 3935 return (ret); 3936 } 3937 if (ret && !error) 3938 error = ret; 3939 } 3940 } 3941 if (gotvp) 3942 vrele(vp); 3943 return (error); 3944} 3945 3946/* 3947 * Move a locally issued open over to an owner on the state list. 3948 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 3949 * returns with it unlocked. 3950 */ 3951static int 3952nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 3953 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 3954 struct ucred *cred, NFSPROC_T *p) 3955{ 3956 struct nfsclopen *op, *nop; 3957 struct nfscldeleg *ndp; 3958 struct nfsnode *np; 3959 int error = 0, newone; 3960 3961 /* 3962 * First, look for an appropriate open, If found, just increment the 3963 * opencnt in it. 3964 */ 3965 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3966 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 3967 op->nfso_fhlen == lop->nfso_fhlen && 3968 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 3969 op->nfso_opencnt += lop->nfso_opencnt; 3970 nfscl_freeopen(lop, 1); 3971 return (0); 3972 } 3973 } 3974 3975 /* No appropriate open, so we have to do one against the server. */ 3976 np = VTONFS(vp); 3977 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 3978 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 3979 newone = 0; 3980 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 3981 lop->nfso_fh, lop->nfso_fhlen, &newone); 3982 ndp = dp; 3983 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 3984 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 3985 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 3986 if (error) { 3987 if (newone) 3988 nfscl_freeopen(op, 0); 3989 } else { 3990 if (newone) 3991 newnfs_copyincred(cred, &op->nfso_cred); 3992 op->nfso_mode |= lop->nfso_mode; 3993 op->nfso_opencnt += lop->nfso_opencnt; 3994 nfscl_freeopen(lop, 1); 3995 } 3996 if (nop != NULL) 3997 FREE((caddr_t)nop, M_NFSCLOPEN); 3998 if (ndp != NULL) { 3999 /* 4000 * What should I do with the returned delegation, since the 4001 * delegation is being recalled? For now, just printf and 4002 * through it away. 4003 */ 4004 printf("Moveopen returned deleg\n"); 4005 FREE((caddr_t)ndp, M_NFSCLDELEG); 4006 } 4007 return (error); 4008} 4009 4010/* 4011 * Recall all delegations on this client. 4012 */ 4013static void 4014nfscl_totalrecall(struct nfsclclient *clp) 4015{ 4016 struct nfscldeleg *dp; 4017 4018 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4019 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4020 dp->nfsdl_flags |= NFSCLDL_RECALL; 4021 } 4022} 4023 4024/* 4025 * Relock byte ranges. Called for delegation recall and state expiry. 4026 */ 4027static int 4028nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4029 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4030 NFSPROC_T *p) 4031{ 4032 struct nfscllockowner *nlp; 4033 struct nfsfh *nfhp; 4034 u_int64_t off, len; 4035 u_int32_t clidrev = 0; 4036 int error, newone, donelocally; 4037 4038 off = lop->nfslo_first; 4039 len = lop->nfslo_end - lop->nfslo_first; 4040 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4041 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4042 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4043 if (error || donelocally) 4044 return (error); 4045 if (nmp->nm_clp != NULL) 4046 clidrev = nmp->nm_clp->nfsc_clientidrev; 4047 else 4048 clidrev = 0; 4049 nfhp = VTONFS(vp)->n_fhp; 4050 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4051 nfhp->nfh_len, nlp, newone, 0, off, 4052 len, lop->nfslo_type, cred, p); 4053 if (error) 4054 nfscl_freelockowner(nlp, 0); 4055 return (error); 4056} 4057 4058/* 4059 * Called to re-open a file. Basically get a vnode for the file handle 4060 * and then call nfsrpc_openrpc() to do the rest. 4061 */ 4062static int 4063nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4064 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4065 struct ucred *cred, NFSPROC_T *p) 4066{ 4067 struct nfsnode *np; 4068 vnode_t vp; 4069 int error; 4070 4071 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4072 if (error) 4073 return (error); 4074 vp = NFSTOV(np); 4075 if (np->n_v4 != NULL) { 4076 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4077 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4078 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4079 cred, p); 4080 } else { 4081 error = EINVAL; 4082 } 4083 vrele(vp); 4084 return (error); 4085} 4086 4087/* 4088 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4089 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4090 * fail. 4091 */ 4092static int 4093nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4094 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4095 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4096 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4097{ 4098 int error; 4099 4100 do { 4101 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4102 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4103 0, 0); 4104 if (error == NFSERR_DELAY) 4105 (void) nfs_catnap(PZERO, error, "nfstryop"); 4106 } while (error == NFSERR_DELAY); 4107 if (error == EAUTH || error == EACCES) { 4108 /* Try again using system credentials */ 4109 newnfs_setroot(cred); 4110 do { 4111 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4112 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4113 delegtype, cred, p, 1, 0); 4114 if (error == NFSERR_DELAY) 4115 (void) nfs_catnap(PZERO, error, "nfstryop"); 4116 } while (error == NFSERR_DELAY); 4117 } 4118 return (error); 4119} 4120 4121/* 4122 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4123 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4124 * cred don't work. 4125 */ 4126static int 4127nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4128 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4129 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4130{ 4131 struct nfsrv_descript nfsd, *nd = &nfsd; 4132 int error; 4133 4134 do { 4135 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4136 reclaim, off, len, type, cred, p, 0); 4137 if (!error && nd->nd_repstat == NFSERR_DELAY) 4138 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4139 "nfstrylck"); 4140 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4141 if (!error) 4142 error = nd->nd_repstat; 4143 if (error == EAUTH || error == EACCES) { 4144 /* Try again using root credentials */ 4145 newnfs_setroot(cred); 4146 do { 4147 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4148 newone, reclaim, off, len, type, cred, p, 1); 4149 if (!error && nd->nd_repstat == NFSERR_DELAY) 4150 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4151 "nfstrylck"); 4152 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4153 if (!error) 4154 error = nd->nd_repstat; 4155 } 4156 return (error); 4157} 4158 4159/* 4160 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4161 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4162 * credentials fail. 4163 */ 4164static int 4165nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4166 struct nfsmount *nmp, NFSPROC_T *p) 4167{ 4168 int error; 4169 4170 do { 4171 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4172 if (error == NFSERR_DELAY) 4173 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4174 } while (error == NFSERR_DELAY); 4175 if (error == EAUTH || error == EACCES) { 4176 /* Try again using system credentials */ 4177 newnfs_setroot(cred); 4178 do { 4179 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4180 if (error == NFSERR_DELAY) 4181 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4182 } while (error == NFSERR_DELAY); 4183 } 4184 return (error); 4185} 4186 4187/* 4188 * Try a close against the server. Just call nfsrpc_closerpc(), 4189 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4190 * credentials fail. 4191 */ 4192APPLESTATIC int 4193nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4194 struct nfsmount *nmp, NFSPROC_T *p) 4195{ 4196 struct nfsrv_descript nfsd, *nd = &nfsd; 4197 int error; 4198 4199 do { 4200 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4201 if (error == NFSERR_DELAY) 4202 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4203 } while (error == NFSERR_DELAY); 4204 if (error == EAUTH || error == EACCES) { 4205 /* Try again using system credentials */ 4206 newnfs_setroot(cred); 4207 do { 4208 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4209 if (error == NFSERR_DELAY) 4210 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4211 } while (error == NFSERR_DELAY); 4212 } 4213 return (error); 4214} 4215 4216/* 4217 * Decide if a delegation on a file permits close without flushing writes 4218 * to the server. This might be a big performance win in some environments. 4219 * (Not useful until the client does caching on local stable storage.) 4220 */ 4221APPLESTATIC int 4222nfscl_mustflush(vnode_t vp) 4223{ 4224 struct nfsclclient *clp; 4225 struct nfscldeleg *dp; 4226 struct nfsnode *np; 4227 struct nfsmount *nmp; 4228 4229 np = VTONFS(vp); 4230 nmp = VFSTONFS(vnode_mount(vp)); 4231 if (!NFSHASNFSV4(nmp)) 4232 return (1); 4233 NFSLOCKCLSTATE(); 4234 clp = nfscl_findcl(nmp); 4235 if (clp == NULL) { 4236 NFSUNLOCKCLSTATE(); 4237 return (1); 4238 } 4239 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4240 if (dp != NULL && (dp->nfsdl_flags & 4241 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4242 NFSCLDL_WRITE && 4243 (dp->nfsdl_sizelimit >= np->n_size || 4244 !NFSHASSTRICT3530(nmp))) { 4245 NFSUNLOCKCLSTATE(); 4246 return (0); 4247 } 4248 NFSUNLOCKCLSTATE(); 4249 return (1); 4250} 4251 4252/* 4253 * See if a (write) delegation exists for this file. 4254 */ 4255APPLESTATIC int 4256nfscl_nodeleg(vnode_t vp, int writedeleg) 4257{ 4258 struct nfsclclient *clp; 4259 struct nfscldeleg *dp; 4260 struct nfsnode *np; 4261 struct nfsmount *nmp; 4262 4263 np = VTONFS(vp); 4264 nmp = VFSTONFS(vnode_mount(vp)); 4265 if (!NFSHASNFSV4(nmp)) 4266 return (1); 4267 NFSLOCKCLSTATE(); 4268 clp = nfscl_findcl(nmp); 4269 if (clp == NULL) { 4270 NFSUNLOCKCLSTATE(); 4271 return (1); 4272 } 4273 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4274 if (dp != NULL && 4275 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4276 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4277 NFSCLDL_WRITE)) { 4278 NFSUNLOCKCLSTATE(); 4279 return (0); 4280 } 4281 NFSUNLOCKCLSTATE(); 4282 return (1); 4283} 4284 4285/* 4286 * Look for an associated delegation that should be DelegReturned. 4287 */ 4288APPLESTATIC int 4289nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4290{ 4291 struct nfsclclient *clp; 4292 struct nfscldeleg *dp; 4293 struct nfsclowner *owp; 4294 struct nfscllockowner *lp; 4295 struct nfsmount *nmp; 4296 struct ucred *cred; 4297 struct nfsnode *np; 4298 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4299 4300 nmp = VFSTONFS(vnode_mount(vp)); 4301 np = VTONFS(vp); 4302 NFSLOCKCLSTATE(); 4303 /* 4304 * Loop around waiting for: 4305 * - outstanding I/O operations on delegations to complete 4306 * - for a delegation on vp that has state, lock the client and 4307 * do a recall 4308 * - return delegation with no state 4309 */ 4310 while (1) { 4311 clp = nfscl_findcl(nmp); 4312 if (clp == NULL) { 4313 NFSUNLOCKCLSTATE(); 4314 return (retcnt); 4315 } 4316 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4317 np->n_fhp->nfh_len); 4318 if (dp != NULL) { 4319 /* 4320 * Wait for outstanding I/O ops to be done. 4321 */ 4322 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4323 if (igotlock) { 4324 nfsv4_unlock(&clp->nfsc_lock, 0); 4325 igotlock = 0; 4326 } 4327 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4328 (void) nfsmsleep(&dp->nfsdl_rwlock, 4329 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4330 continue; 4331 } 4332 needsrecall = 0; 4333 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4334 if (!LIST_EMPTY(&owp->nfsow_open)) { 4335 needsrecall = 1; 4336 break; 4337 } 4338 } 4339 if (!needsrecall) { 4340 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4341 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4342 needsrecall = 1; 4343 break; 4344 } 4345 } 4346 } 4347 if (needsrecall && !triedrecall) { 4348 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4349 islept = 0; 4350 while (!igotlock) { 4351 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4352 &islept, NFSCLSTATEMUTEXPTR, NULL); 4353 if (islept) 4354 break; 4355 } 4356 if (islept) 4357 continue; 4358 NFSUNLOCKCLSTATE(); 4359 cred = newnfs_getcred(); 4360 newnfs_copycred(&dp->nfsdl_cred, cred); 4361 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 4362 NFSFREECRED(cred); 4363 triedrecall = 1; 4364 NFSLOCKCLSTATE(); 4365 nfsv4_unlock(&clp->nfsc_lock, 0); 4366 igotlock = 0; 4367 continue; 4368 } 4369 *stp = dp->nfsdl_stateid; 4370 retcnt = 1; 4371 nfscl_cleandeleg(dp); 4372 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4373 } 4374 if (igotlock) 4375 nfsv4_unlock(&clp->nfsc_lock, 0); 4376 NFSUNLOCKCLSTATE(); 4377 return (retcnt); 4378 } 4379} 4380 4381/* 4382 * Look for associated delegation(s) that should be DelegReturned. 4383 */ 4384APPLESTATIC int 4385nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4386 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4387{ 4388 struct nfsclclient *clp; 4389 struct nfscldeleg *dp; 4390 struct nfsclowner *owp; 4391 struct nfscllockowner *lp; 4392 struct nfsmount *nmp; 4393 struct ucred *cred; 4394 struct nfsnode *np; 4395 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4396 4397 nmp = VFSTONFS(vnode_mount(fvp)); 4398 *gotfdp = 0; 4399 *gottdp = 0; 4400 NFSLOCKCLSTATE(); 4401 /* 4402 * Loop around waiting for: 4403 * - outstanding I/O operations on delegations to complete 4404 * - for a delegation on fvp that has state, lock the client and 4405 * do a recall 4406 * - return delegation(s) with no state. 4407 */ 4408 while (1) { 4409 clp = nfscl_findcl(nmp); 4410 if (clp == NULL) { 4411 NFSUNLOCKCLSTATE(); 4412 return (retcnt); 4413 } 4414 np = VTONFS(fvp); 4415 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4416 np->n_fhp->nfh_len); 4417 if (dp != NULL && *gotfdp == 0) { 4418 /* 4419 * Wait for outstanding I/O ops to be done. 4420 */ 4421 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4422 if (igotlock) { 4423 nfsv4_unlock(&clp->nfsc_lock, 0); 4424 igotlock = 0; 4425 } 4426 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4427 (void) nfsmsleep(&dp->nfsdl_rwlock, 4428 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4429 continue; 4430 } 4431 needsrecall = 0; 4432 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4433 if (!LIST_EMPTY(&owp->nfsow_open)) { 4434 needsrecall = 1; 4435 break; 4436 } 4437 } 4438 if (!needsrecall) { 4439 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4440 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4441 needsrecall = 1; 4442 break; 4443 } 4444 } 4445 } 4446 if (needsrecall && !triedrecall) { 4447 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4448 islept = 0; 4449 while (!igotlock) { 4450 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4451 &islept, NFSCLSTATEMUTEXPTR, NULL); 4452 if (islept) 4453 break; 4454 } 4455 if (islept) 4456 continue; 4457 NFSUNLOCKCLSTATE(); 4458 cred = newnfs_getcred(); 4459 newnfs_copycred(&dp->nfsdl_cred, cred); 4460 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4461 NFSFREECRED(cred); 4462 triedrecall = 1; 4463 NFSLOCKCLSTATE(); 4464 nfsv4_unlock(&clp->nfsc_lock, 0); 4465 igotlock = 0; 4466 continue; 4467 } 4468 *fstp = dp->nfsdl_stateid; 4469 retcnt++; 4470 *gotfdp = 1; 4471 nfscl_cleandeleg(dp); 4472 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4473 } 4474 if (igotlock) { 4475 nfsv4_unlock(&clp->nfsc_lock, 0); 4476 igotlock = 0; 4477 } 4478 if (tvp != NULL) { 4479 np = VTONFS(tvp); 4480 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4481 np->n_fhp->nfh_len); 4482 if (dp != NULL && *gottdp == 0) { 4483 /* 4484 * Wait for outstanding I/O ops to be done. 4485 */ 4486 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4487 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4488 (void) nfsmsleep(&dp->nfsdl_rwlock, 4489 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4490 continue; 4491 } 4492 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4493 if (!LIST_EMPTY(&owp->nfsow_open)) { 4494 NFSUNLOCKCLSTATE(); 4495 return (retcnt); 4496 } 4497 } 4498 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4499 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4500 NFSUNLOCKCLSTATE(); 4501 return (retcnt); 4502 } 4503 } 4504 *tstp = dp->nfsdl_stateid; 4505 retcnt++; 4506 *gottdp = 1; 4507 nfscl_cleandeleg(dp); 4508 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4509 } 4510 } 4511 NFSUNLOCKCLSTATE(); 4512 return (retcnt); 4513 } 4514} 4515 4516/* 4517 * Get a reference on the clientid associated with the mount point. 4518 * Return 1 if success, 0 otherwise. 4519 */ 4520APPLESTATIC int 4521nfscl_getref(struct nfsmount *nmp) 4522{ 4523 struct nfsclclient *clp; 4524 4525 NFSLOCKCLSTATE(); 4526 clp = nfscl_findcl(nmp); 4527 if (clp == NULL) { 4528 NFSUNLOCKCLSTATE(); 4529 return (0); 4530 } 4531 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4532 NFSUNLOCKCLSTATE(); 4533 return (1); 4534} 4535 4536/* 4537 * Release a reference on a clientid acquired with the above call. 4538 */ 4539APPLESTATIC void 4540nfscl_relref(struct nfsmount *nmp) 4541{ 4542 struct nfsclclient *clp; 4543 4544 NFSLOCKCLSTATE(); 4545 clp = nfscl_findcl(nmp); 4546 if (clp == NULL) { 4547 NFSUNLOCKCLSTATE(); 4548 return; 4549 } 4550 nfsv4_relref(&clp->nfsc_lock); 4551 NFSUNLOCKCLSTATE(); 4552} 4553 4554/* 4555 * Save the size attribute in the delegation, since the nfsnode 4556 * is going away. 4557 */ 4558APPLESTATIC void 4559nfscl_reclaimnode(vnode_t vp) 4560{ 4561 struct nfsclclient *clp; 4562 struct nfscldeleg *dp; 4563 struct nfsnode *np = VTONFS(vp); 4564 struct nfsmount *nmp; 4565 4566 nmp = VFSTONFS(vnode_mount(vp)); 4567 if (!NFSHASNFSV4(nmp)) 4568 return; 4569 NFSLOCKCLSTATE(); 4570 clp = nfscl_findcl(nmp); 4571 if (clp == NULL) { 4572 NFSUNLOCKCLSTATE(); 4573 return; 4574 } 4575 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4576 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4577 dp->nfsdl_size = np->n_size; 4578 NFSUNLOCKCLSTATE(); 4579} 4580 4581/* 4582 * Get the saved size attribute in the delegation, since it is a 4583 * newly allocated nfsnode. 4584 */ 4585APPLESTATIC void 4586nfscl_newnode(vnode_t vp) 4587{ 4588 struct nfsclclient *clp; 4589 struct nfscldeleg *dp; 4590 struct nfsnode *np = VTONFS(vp); 4591 struct nfsmount *nmp; 4592 4593 nmp = VFSTONFS(vnode_mount(vp)); 4594 if (!NFSHASNFSV4(nmp)) 4595 return; 4596 NFSLOCKCLSTATE(); 4597 clp = nfscl_findcl(nmp); 4598 if (clp == NULL) { 4599 NFSUNLOCKCLSTATE(); 4600 return; 4601 } 4602 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4603 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4604 np->n_size = dp->nfsdl_size; 4605 NFSUNLOCKCLSTATE(); 4606} 4607 4608/* 4609 * If there is a valid write delegation for this file, set the modtime 4610 * to the local clock time. 4611 */ 4612APPLESTATIC void 4613nfscl_delegmodtime(vnode_t vp) 4614{ 4615 struct nfsclclient *clp; 4616 struct nfscldeleg *dp; 4617 struct nfsnode *np = VTONFS(vp); 4618 struct nfsmount *nmp; 4619 4620 nmp = VFSTONFS(vnode_mount(vp)); 4621 if (!NFSHASNFSV4(nmp)) 4622 return; 4623 NFSLOCKCLSTATE(); 4624 clp = nfscl_findcl(nmp); 4625 if (clp == NULL) { 4626 NFSUNLOCKCLSTATE(); 4627 return; 4628 } 4629 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4630 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4631 nanotime(&dp->nfsdl_modtime); 4632 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4633 } 4634 NFSUNLOCKCLSTATE(); 4635} 4636 4637/* 4638 * If there is a valid write delegation for this file with a modtime set, 4639 * put that modtime in mtime. 4640 */ 4641APPLESTATIC void 4642nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4643{ 4644 struct nfsclclient *clp; 4645 struct nfscldeleg *dp; 4646 struct nfsnode *np = VTONFS(vp); 4647 struct nfsmount *nmp; 4648 4649 nmp = VFSTONFS(vnode_mount(vp)); 4650 if (!NFSHASNFSV4(nmp)) 4651 return; 4652 NFSLOCKCLSTATE(); 4653 clp = nfscl_findcl(nmp); 4654 if (clp == NULL) { 4655 NFSUNLOCKCLSTATE(); 4656 return; 4657 } 4658 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4659 if (dp != NULL && 4660 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4661 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4662 *mtime = dp->nfsdl_modtime; 4663 NFSUNLOCKCLSTATE(); 4664} 4665 4666static int 4667nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4668{ 4669 short *defaulterrp, *errp; 4670 4671 if (!nd->nd_repstat) 4672 return (0); 4673 if (nd->nd_procnum == NFSPROC_NOOP) 4674 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4675 if (nd->nd_repstat == EBADRPC) 4676 return (txdr_unsigned(NFSERR_BADXDR)); 4677 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4678 nd->nd_repstat == NFSERR_OPILLEGAL) 4679 return (txdr_unsigned(nd->nd_repstat)); 4680 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4681 minorvers > NFSV4_MINORVERSION) { 4682 /* NFSv4.n error. */ 4683 return (txdr_unsigned(nd->nd_repstat)); 4684 } 4685 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4686 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4687 else 4688 return (txdr_unsigned(nd->nd_repstat)); 4689 while (*++errp) 4690 if (*errp == (short)nd->nd_repstat) 4691 return (txdr_unsigned(nd->nd_repstat)); 4692 return (txdr_unsigned(*defaulterrp)); 4693} 4694 4695/* 4696 * Called to find/add a layout to a client. 4697 * This function returns the layout with a refcnt (shared lock) upon 4698 * success (returns 0) or with no lock/refcnt on the layout when an 4699 * error is returned. 4700 * If a layout is passed in via lypp, it is locked (exclusively locked). 4701 */ 4702APPLESTATIC int 4703nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4704 nfsv4stateid_t *stateidp, int retonclose, 4705 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4706 struct ucred *cred, NFSPROC_T *p) 4707{ 4708 struct nfsclclient *clp; 4709 struct nfscllayout *lyp, *tlyp; 4710 struct nfsclflayout *flp; 4711 struct nfsnode *np = VTONFS(vp); 4712 mount_t mp; 4713 int layout_passed_in; 4714 4715 mp = nmp->nm_mountp; 4716 layout_passed_in = 1; 4717 tlyp = NULL; 4718 lyp = *lypp; 4719 if (lyp == NULL) { 4720 layout_passed_in = 0; 4721 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4722 M_WAITOK | M_ZERO); 4723 } 4724 4725 NFSLOCKCLSTATE(); 4726 clp = nmp->nm_clp; 4727 if (clp == NULL) { 4728 if (layout_passed_in != 0) 4729 nfsv4_unlock(&lyp->nfsly_lock, 0); 4730 NFSUNLOCKCLSTATE(); 4731 if (tlyp != NULL) 4732 free(tlyp, M_NFSLAYOUT); 4733 return (EPERM); 4734 } 4735 if (lyp == NULL) { 4736 /* 4737 * Although no lyp was passed in, another thread might have 4738 * allocated one. If one is found, just increment it's ref 4739 * count and return it. 4740 */ 4741 lyp = nfscl_findlayout(clp, fhp, fhlen); 4742 if (lyp == NULL) { 4743 lyp = tlyp; 4744 tlyp = NULL; 4745 lyp->nfsly_stateid.seqid = stateidp->seqid; 4746 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 4747 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 4748 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 4749 lyp->nfsly_lastbyte = 0; 4750 LIST_INIT(&lyp->nfsly_flayread); 4751 LIST_INIT(&lyp->nfsly_flayrw); 4752 LIST_INIT(&lyp->nfsly_recall); 4753 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 4754 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 4755 lyp->nfsly_clp = clp; 4756 lyp->nfsly_flags = (retonclose != 0) ? 4757 (NFSLY_FILES | NFSLY_RETONCLOSE) : NFSLY_FILES; 4758 lyp->nfsly_fhlen = fhlen; 4759 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 4760 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4761 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 4762 nfsly_hash); 4763 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4764 nfscl_layoutcnt++; 4765 } else { 4766 if (retonclose != 0) 4767 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4768 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4769 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4770 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4771 } 4772 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 4773 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 4774 NFSUNLOCKCLSTATE(); 4775 if (tlyp != NULL) 4776 free(tlyp, M_NFSLAYOUT); 4777 return (EPERM); 4778 } 4779 *lypp = lyp; 4780 } else 4781 lyp->nfsly_stateid.seqid = stateidp->seqid; 4782 4783 /* Merge the new list of File Layouts into the list. */ 4784 flp = LIST_FIRST(fhlp); 4785 if (flp != NULL) { 4786 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 4787 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 4788 else 4789 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 4790 } 4791 if (layout_passed_in != 0) 4792 nfsv4_unlock(&lyp->nfsly_lock, 1); 4793 NFSUNLOCKCLSTATE(); 4794 if (tlyp != NULL) 4795 free(tlyp, M_NFSLAYOUT); 4796 return (0); 4797} 4798 4799/* 4800 * Search for a layout by MDS file handle. 4801 * If one is found, it is returned with a refcnt (shared lock) iff 4802 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 4803 * returned NULL. 4804 */ 4805struct nfscllayout * 4806nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 4807 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 4808{ 4809 struct nfscllayout *lyp; 4810 mount_t mp; 4811 int error, igotlock; 4812 4813 mp = clp->nfsc_nmp->nm_mountp; 4814 *recalledp = 0; 4815 *retflpp = NULL; 4816 NFSLOCKCLSTATE(); 4817 lyp = nfscl_findlayout(clp, fhp, fhlen); 4818 if (lyp != NULL) { 4819 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4820 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4821 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4822 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4823 error = nfscl_findlayoutforio(lyp, off, 4824 NFSV4OPEN_ACCESSREAD, retflpp); 4825 if (error == 0) 4826 nfsv4_getref(&lyp->nfsly_lock, NULL, 4827 NFSCLSTATEMUTEXPTR, mp); 4828 else { 4829 do { 4830 igotlock = nfsv4_lock(&lyp->nfsly_lock, 4831 1, NULL, NFSCLSTATEMUTEXPTR, mp); 4832 } while (igotlock == 0 && 4833 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0); 4834 *retflpp = NULL; 4835 } 4836 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 4837 lyp = NULL; 4838 *recalledp = 1; 4839 } 4840 } else { 4841 lyp = NULL; 4842 *recalledp = 1; 4843 } 4844 } 4845 NFSUNLOCKCLSTATE(); 4846 return (lyp); 4847} 4848 4849/* 4850 * Search for a layout by MDS file handle. If one is found that is marked 4851 * "return on close", delete it, since it should now be forgotten. 4852 */ 4853static void 4854nfscl_retoncloselayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen) 4855{ 4856 struct nfscllayout *lyp; 4857 4858tryagain: 4859 lyp = nfscl_findlayout(clp, fhp, fhlen); 4860 if (lyp != NULL && (lyp->nfsly_flags & NFSLY_RETONCLOSE) != 0) { 4861 /* 4862 * Wait for outstanding I/O ops to be done. 4863 */ 4864 if (lyp->nfsly_lock.nfslock_usecnt != 0 || 4865 lyp->nfsly_lock.nfslock_lock != 0) { 4866 lyp->nfsly_lock.nfslock_lock |= NFSV4LOCK_WANTED; 4867 (void)mtx_sleep(&lyp->nfsly_lock, 4868 NFSCLSTATEMUTEXPTR, PZERO, "nfslyc", 0); 4869 goto tryagain; 4870 } 4871 nfscl_freelayout(lyp); 4872 } 4873} 4874 4875/* 4876 * Dereference a layout. 4877 */ 4878void 4879nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 4880{ 4881 4882 NFSLOCKCLSTATE(); 4883 if (exclocked != 0) 4884 nfsv4_unlock(&lyp->nfsly_lock, 0); 4885 else 4886 nfsv4_relref(&lyp->nfsly_lock); 4887 NFSUNLOCKCLSTATE(); 4888} 4889 4890/* 4891 * Search for a devinfo by deviceid. If one is found, return it after 4892 * acquiring a reference count on it. 4893 */ 4894struct nfscldevinfo * 4895nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 4896 struct nfscldevinfo *dip) 4897{ 4898 4899 NFSLOCKCLSTATE(); 4900 if (dip == NULL) 4901 dip = nfscl_finddevinfo(clp, deviceid); 4902 if (dip != NULL) 4903 dip->nfsdi_refcnt++; 4904 NFSUNLOCKCLSTATE(); 4905 return (dip); 4906} 4907 4908/* 4909 * Dereference a devinfo structure. 4910 */ 4911static void 4912nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 4913{ 4914 4915 dip->nfsdi_refcnt--; 4916 if (dip->nfsdi_refcnt == 0) 4917 wakeup(&dip->nfsdi_refcnt); 4918} 4919 4920/* 4921 * Dereference a devinfo structure. 4922 */ 4923void 4924nfscl_reldevinfo(struct nfscldevinfo *dip) 4925{ 4926 4927 NFSLOCKCLSTATE(); 4928 nfscl_reldevinfo_locked(dip); 4929 NFSUNLOCKCLSTATE(); 4930} 4931 4932/* 4933 * Find a layout for this file handle. Return NULL upon failure. 4934 */ 4935static struct nfscllayout * 4936nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 4937{ 4938 struct nfscllayout *lyp; 4939 4940 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 4941 if (lyp->nfsly_fhlen == fhlen && 4942 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 4943 break; 4944 return (lyp); 4945} 4946 4947/* 4948 * Find a devinfo for this deviceid. Return NULL upon failure. 4949 */ 4950static struct nfscldevinfo * 4951nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 4952{ 4953 struct nfscldevinfo *dip; 4954 4955 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 4956 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 4957 == 0) 4958 break; 4959 return (dip); 4960} 4961 4962/* 4963 * Merge the new file layout list into the main one, maintaining it in 4964 * increasing offset order. 4965 */ 4966static void 4967nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 4968 struct nfsclflayouthead *newfhlp) 4969{ 4970 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 4971 4972 flp = LIST_FIRST(fhlp); 4973 prevflp = NULL; 4974 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 4975 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 4976 prevflp = flp; 4977 flp = LIST_NEXT(flp, nfsfl_list); 4978 } 4979 if (prevflp == NULL) 4980 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 4981 else 4982 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 4983 prevflp = nflp; 4984 } 4985} 4986 4987/* 4988 * Add this nfscldevinfo to the client, if it doesn't already exist. 4989 * This function consumes the structure pointed at by dip, if not NULL. 4990 */ 4991APPLESTATIC int 4992nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, 4993 struct nfsclflayout *flp) 4994{ 4995 struct nfsclclient *clp; 4996 struct nfscldevinfo *tdip; 4997 4998 NFSLOCKCLSTATE(); 4999 clp = nmp->nm_clp; 5000 if (clp == NULL) { 5001 NFSUNLOCKCLSTATE(); 5002 if (dip != NULL) 5003 free(dip, M_NFSDEVINFO); 5004 return (ENODEV); 5005 } 5006 tdip = nfscl_finddevinfo(clp, flp->nfsfl_dev); 5007 if (tdip != NULL) { 5008 tdip->nfsdi_layoutrefs++; 5009 flp->nfsfl_devp = tdip; 5010 nfscl_reldevinfo_locked(tdip); 5011 NFSUNLOCKCLSTATE(); 5012 if (dip != NULL) 5013 free(dip, M_NFSDEVINFO); 5014 return (0); 5015 } 5016 if (dip != NULL) { 5017 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5018 dip->nfsdi_layoutrefs = 1; 5019 flp->nfsfl_devp = dip; 5020 } 5021 NFSUNLOCKCLSTATE(); 5022 if (dip == NULL) 5023 return (ENODEV); 5024 return (0); 5025} 5026 5027/* 5028 * Free up a layout structure and associated file layout structure(s). 5029 */ 5030APPLESTATIC void 5031nfscl_freelayout(struct nfscllayout *layp) 5032{ 5033 struct nfsclflayout *flp, *nflp; 5034 struct nfsclrecalllayout *rp, *nrp; 5035 5036 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5037 LIST_REMOVE(flp, nfsfl_list); 5038 nfscl_freeflayout(flp); 5039 } 5040 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5041 LIST_REMOVE(flp, nfsfl_list); 5042 nfscl_freeflayout(flp); 5043 } 5044 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5045 LIST_REMOVE(rp, nfsrecly_list); 5046 free(rp, M_NFSLAYRECALL); 5047 } 5048 nfscl_layoutcnt--; 5049 free(layp, M_NFSLAYOUT); 5050} 5051 5052/* 5053 * Free up a file layout structure. 5054 */ 5055APPLESTATIC void 5056nfscl_freeflayout(struct nfsclflayout *flp) 5057{ 5058 int i; 5059 5060 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5061 free(flp->nfsfl_fh[i], M_NFSFH); 5062 if (flp->nfsfl_devp != NULL) 5063 flp->nfsfl_devp->nfsdi_layoutrefs--; 5064 free(flp, M_NFSFLAYOUT); 5065} 5066 5067/* 5068 * Free up a file layout devinfo structure. 5069 */ 5070APPLESTATIC void 5071nfscl_freedevinfo(struct nfscldevinfo *dip) 5072{ 5073 5074 free(dip, M_NFSDEVINFO); 5075} 5076 5077/* 5078 * Mark any layouts that match as recalled. 5079 */ 5080static int 5081nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5082 uint64_t off, uint64_t len, uint32_t stateseqid, 5083 struct nfsclrecalllayout *recallp) 5084{ 5085 struct nfsclrecalllayout *rp, *orp; 5086 5087 recallp->nfsrecly_recalltype = recalltype; 5088 recallp->nfsrecly_iomode = iomode; 5089 recallp->nfsrecly_stateseqid = stateseqid; 5090 recallp->nfsrecly_off = off; 5091 recallp->nfsrecly_len = len; 5092 /* 5093 * Order the list as file returns first, followed by fsid and any 5094 * returns, both in increasing stateseqid order. 5095 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5096 * (I'm not sure this is correct because I find RFC5661 confusing 5097 * on this, but hopefully it will work ok.) 5098 */ 5099 orp = NULL; 5100 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5101 orp = rp; 5102 if ((recalltype == NFSLAYOUTRETURN_FILE && 5103 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5104 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5105 (recalltype != NFSLAYOUTRETURN_FILE && 5106 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5107 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5108 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5109 break; 5110 } 5111 } 5112 if (rp == NULL) { 5113 if (orp == NULL) 5114 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5115 nfsrecly_list); 5116 else 5117 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5118 } 5119 lyp->nfsly_flags |= NFSLY_RECALL; 5120 return (0); 5121} 5122 5123/* 5124 * Compare the two seqids for ordering. The trick is that the seqids can 5125 * wrap around from 0xffffffff->0, so check for the cases where one 5126 * has wrapped around. 5127 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5128 */ 5129static int 5130nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5131{ 5132 5133 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5134 /* seqid2 has wrapped around. */ 5135 return (0); 5136 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5137 /* seqid1 has wrapped around. */ 5138 return (1); 5139 if (seqid1 <= seqid2) 5140 return (1); 5141 return (0); 5142} 5143 5144/* 5145 * Do a layout return for each of the recalls. 5146 */ 5147static void 5148nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5149 struct ucred *cred, NFSPROC_T *p) 5150{ 5151 struct nfsclrecalllayout *rp; 5152 nfsv4stateid_t stateid; 5153 5154 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5155 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5156 stateid.seqid = rp->nfsrecly_stateseqid; 5157 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5158 lyp->nfsly_fhlen, 0, NFSLAYOUT_NFSV4_1_FILES, 5159 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5160 rp->nfsrecly_off, rp->nfsrecly_len, 5161 &stateid, 0, NULL, cred, p, NULL); 5162 } 5163} 5164 5165/* 5166 * Do the layout commit for a file layout. 5167 */ 5168static void 5169nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5170 struct ucred *cred, NFSPROC_T *p) 5171{ 5172 struct nfsclflayout *flp; 5173 uint64_t len; 5174 int error; 5175 5176 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5177 if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5178 len = flp->nfsfl_end - flp->nfsfl_off; 5179 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5180 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5181 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5182 NFSLAYOUT_NFSV4_1_FILES, 0, NULL, cred, p, NULL); 5183 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5184 if (error == NFSERR_NOTSUPP) { 5185 /* If not supported, don't bother doing it. */ 5186 NFSLOCKMNT(nmp); 5187 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5188 NFSUNLOCKMNT(nmp); 5189 break; 5190 } 5191 } 5192 } 5193} 5194 5195/* 5196 * Commit all layouts for a file (vnode). 5197 */ 5198int 5199nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5200{ 5201 struct nfsclclient *clp; 5202 struct nfscllayout *lyp; 5203 struct nfsnode *np = VTONFS(vp); 5204 mount_t mp; 5205 struct nfsmount *nmp; 5206 5207 mp = vnode_mount(vp); 5208 nmp = VFSTONFS(mp); 5209 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5210 return (0); 5211 NFSLOCKCLSTATE(); 5212 clp = nmp->nm_clp; 5213 if (clp == NULL) { 5214 NFSUNLOCKCLSTATE(); 5215 return (EPERM); 5216 } 5217 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5218 if (lyp == NULL) { 5219 NFSUNLOCKCLSTATE(); 5220 return (EPERM); 5221 } 5222 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5223 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 5224 NFSUNLOCKCLSTATE(); 5225 return (EPERM); 5226 } 5227tryagain: 5228 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5229 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5230 NFSUNLOCKCLSTATE(); 5231 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5232 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5233 NFSLOCKCLSTATE(); 5234 goto tryagain; 5235 } 5236 nfsv4_relref(&lyp->nfsly_lock); 5237 NFSUNLOCKCLSTATE(); 5238 return (0); 5239} 5240 5241