1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Rick Macklem, University of Guelph 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * These functions implement the client side state handling for NFSv4. 35 * NFSv4 state handling: 36 * - A lockowner is used to determine lock contention, so it 37 * corresponds directly to a Posix pid. (1 to 1 mapping) 38 * - The correct granularity of an OpenOwner is not nearly so 39 * obvious. An OpenOwner does the following: 40 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner 41 * - is used to check for Open/Share contention (not applicable to 42 * this client, since all Opens are Deny_None) 43 * As such, I considered both extreme. 44 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes 45 * all Open, Close and Lock (with a new lockowner) Ops. 46 * 1 OpenOwner for each Open - This one results in an OpenConfirm for 47 * every Open, for most servers. 48 * So, I chose to use the same mapping as I did for LockOwnwers. 49 * The main concern here is that you can end up with multiple Opens 50 * for the same File Handle, but on different OpenOwners (opens 51 * inherited from parents, grandparents...) and you do not know 52 * which of these the vnodeop close applies to. This is handled by 53 * delaying the Close Op(s) until all of the Opens have been closed. 54 * (It is not yet obvious if this is the correct granularity.) 55 * - How the code handles serialization: 56 * - For the ClientId, it uses an exclusive lock while getting its 57 * SetClientId and during recovery. Otherwise, it uses a shared 58 * lock via a reference count. 59 * - For the rest of the data structures, it uses an SMP mutex 60 * (once the nfs client is SMP safe) and doesn't sleep while 61 * manipulating the linked lists. 62 * - The serialization of Open/Close/Lock/LockU falls out in the 63 * "wash", since OpenOwners and LockOwners are both mapped from 64 * Posix pid. In other words, there is only one Posix pid using 65 * any given owner, so that owner is serialized. (If you change 66 * the granularity of the OpenOwner, then code must be added to 67 * serialize Ops on the OpenOwner.) 68 * - When to get rid of OpenOwners and LockOwners. 69 * - The function nfscl_cleanup_common() is executed after a process exits. 70 * It goes through the client list looking for all Open and Lock Owners. 71 * When one is found, it is marked "defunct" or in the case of 72 * an OpenOwner without any Opens, freed. 73 * The renew thread scans for defunct Owners and gets rid of them, 74 * if it can. The LockOwners will also be deleted when the 75 * associated Open is closed. 76 * - If the LockU or Close Op(s) fail during close in a way 77 * that could be recovered upon retry, they are relinked to the 78 * ClientId's defunct open list and retried by the renew thread 79 * until they succeed or an unmount/recovery occurs. 80 * (Since we are done with them, they do not need to be recovered.) 81 */ 82 83 #ifndef APPLEKEXT 84 #include <fs/nfs/nfsport.h> 85 86 /* 87 * Global variables 88 */ 89 extern struct nfsstatsv1 nfsstatsv1; 90 extern struct nfsreqhead nfsd_reqq; 91 extern u_int32_t newnfs_false, newnfs_true; 92 extern int nfscl_debuglevel; 93 extern int nfscl_enablecallb; 94 extern int nfs_numnfscbd; 95 NFSREQSPINLOCK; 96 NFSCLSTATEMUTEX; 97 int nfscl_inited = 0; 98 struct nfsclhead nfsclhead; /* Head of clientid list */ 99 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER; 100 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER; 101 #endif /* !APPLEKEXT */ 102 103 static int nfscl_delegcnt = 0; 104 static int nfscl_layoutcnt = 0; 105 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *, 106 u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **); 107 static void nfscl_clrelease(struct nfsclclient *); 108 static void nfscl_cleanclient(struct nfsclclient *); 109 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 110 struct ucred *, NFSPROC_T *); 111 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 112 struct nfsmount *, struct ucred *, NFSPROC_T *); 113 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *); 114 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 115 struct nfscllock *, int); 116 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 117 struct nfscllock **, int); 118 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *); 119 static u_int32_t nfscl_nextcbident(void); 120 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **); 121 static struct nfsclclient *nfscl_getclnt(u_int32_t); 122 static struct nfsclclient *nfscl_getclntsess(uint8_t *); 123 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 124 int); 125 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *, 126 int, struct nfsclrecalllayout **); 127 static void nfscl_reldevinfo_locked(struct nfscldevinfo *); 128 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *, 129 int); 130 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *); 131 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 132 u_int8_t *, struct nfscllock **); 133 static void nfscl_freealllocks(struct nfscllockownerhead *, int); 134 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 135 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 136 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 137 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 138 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *); 139 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 140 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 141 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 142 static void nfscl_totalrecall(struct nfsclclient *); 143 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 144 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 145 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 146 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 147 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 148 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 149 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 150 struct ucred *, NFSPROC_T *); 151 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 152 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 153 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *); 154 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t); 155 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 156 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 157 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int); 158 static void nfscl_freeopenowner(struct nfsclowner *, int); 159 static void nfscl_cleandeleg(struct nfscldeleg *); 160 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 161 struct nfsmount *, NFSPROC_T *); 162 static void nfscl_emptylockowner(struct nfscllockowner *, 163 struct nfscllockownerfhhead *); 164 static void nfscl_mergeflayouts(struct nfsclflayouthead *, 165 struct nfsclflayouthead *); 166 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t, 167 uint64_t, uint32_t, uint32_t, uint32_t, char *, struct nfsclrecalllayout *); 168 static int nfscl_seq(uint32_t, uint32_t); 169 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *, 170 struct ucred *, NFSPROC_T *); 171 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *, 172 struct ucred *, NFSPROC_T *); 173 174 static short nfscberr_null[] = { 175 0, 176 0, 177 }; 178 179 static short nfscberr_getattr[] = { 180 NFSERR_RESOURCE, 181 NFSERR_BADHANDLE, 182 NFSERR_BADXDR, 183 NFSERR_RESOURCE, 184 NFSERR_SERVERFAULT, 185 0, 186 }; 187 188 static short nfscberr_recall[] = { 189 NFSERR_RESOURCE, 190 NFSERR_BADHANDLE, 191 NFSERR_BADSTATEID, 192 NFSERR_BADXDR, 193 NFSERR_RESOURCE, 194 NFSERR_SERVERFAULT, 195 0, 196 }; 197 198 static short *nfscl_cberrmap[] = { 199 nfscberr_null, 200 nfscberr_null, 201 nfscberr_null, 202 nfscberr_getattr, 203 nfscberr_recall 204 }; 205 206 #define NETFAMILY(clp) \ 207 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 208 209 /* 210 * Called for an open operation. 211 * If the nfhp argument is NULL, just get an openowner. 212 */ 213 APPLESTATIC int 214 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 215 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 216 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 217 { 218 struct nfsclclient *clp; 219 struct nfsclowner *owp, *nowp; 220 struct nfsclopen *op = NULL, *nop = NULL; 221 struct nfscldeleg *dp; 222 struct nfsclownerhead *ohp; 223 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 224 int ret; 225 226 if (newonep != NULL) 227 *newonep = 0; 228 if (opp != NULL) 229 *opp = NULL; 230 if (owpp != NULL) 231 *owpp = NULL; 232 233 /* 234 * Might need one or both of these, so MALLOC them now, to 235 * avoid a tsleep() in MALLOC later. 236 */ 237 nowp = malloc(sizeof (struct nfsclowner), 238 M_NFSCLOWNER, M_WAITOK); 239 if (nfhp != NULL) 240 nop = malloc(sizeof (struct nfsclopen) + 241 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 242 ret = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 243 if (ret != 0) { 244 free(nowp, M_NFSCLOWNER); 245 if (nop != NULL) 246 free(nop, M_NFSCLOPEN); 247 return (ret); 248 } 249 250 /* 251 * Get the Open iff it already exists. 252 * If none found, add the new one or return error, depending upon 253 * "create". 254 */ 255 NFSLOCKCLSTATE(); 256 dp = NULL; 257 /* First check the delegation list */ 258 if (nfhp != NULL && usedeleg) { 259 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 260 if (dp->nfsdl_fhlen == fhlen && 261 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 262 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 263 (dp->nfsdl_flags & NFSCLDL_WRITE)) 264 break; 265 dp = NULL; 266 break; 267 } 268 } 269 } 270 271 if (dp != NULL) { 272 nfscl_filllockowner(p->td_proc, own, F_POSIX); 273 ohp = &dp->nfsdl_owner; 274 } else { 275 /* For NFSv4.1 and this option, use a single open_owner. */ 276 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 277 nfscl_filllockowner(NULL, own, F_POSIX); 278 else 279 nfscl_filllockowner(p->td_proc, own, F_POSIX); 280 ohp = &clp->nfsc_owner; 281 } 282 /* Now, search for an openowner */ 283 LIST_FOREACH(owp, ohp, nfsow_list) { 284 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 285 break; 286 } 287 288 /* 289 * Create a new open, as required. 290 */ 291 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 292 cred, newonep); 293 294 /* 295 * Now, check the mode on the open and return the appropriate 296 * value. 297 */ 298 if (retp != NULL) { 299 if (nfhp != NULL && dp != NULL && nop == NULL) 300 /* new local open on delegation */ 301 *retp = NFSCLOPEN_SETCRED; 302 else 303 *retp = NFSCLOPEN_OK; 304 } 305 if (op != NULL && (amode & ~(op->nfso_mode))) { 306 op->nfso_mode |= amode; 307 if (retp != NULL && dp == NULL) 308 *retp = NFSCLOPEN_DOOPEN; 309 } 310 311 /* 312 * Serialize modifications to the open owner for multiple threads 313 * within the same process using a read/write sleep lock. 314 * For NFSv4.1 and a single OpenOwner, allow concurrent open operations 315 * by acquiring a shared lock. The close operations still use an 316 * exclusive lock for this case. 317 */ 318 if (lockit != 0) { 319 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) { 320 /* 321 * Get a shared lock on the OpenOwner, but first 322 * wait for any pending exclusive lock, so that the 323 * exclusive locker gets priority. 324 */ 325 nfsv4_lock(&owp->nfsow_rwlock, 0, NULL, 326 NFSCLSTATEMUTEXPTR, NULL); 327 nfsv4_getref(&owp->nfsow_rwlock, NULL, 328 NFSCLSTATEMUTEXPTR, NULL); 329 } else 330 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 331 } 332 NFSUNLOCKCLSTATE(); 333 if (nowp != NULL) 334 free(nowp, M_NFSCLOWNER); 335 if (nop != NULL) 336 free(nop, M_NFSCLOPEN); 337 if (owpp != NULL) 338 *owpp = owp; 339 if (opp != NULL) 340 *opp = op; 341 return (0); 342 } 343 344 /* 345 * Create a new open, as required. 346 */ 347 static void 348 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 349 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 350 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 351 struct ucred *cred, int *newonep) 352 { 353 struct nfsclowner *owp = *owpp, *nowp; 354 struct nfsclopen *op, *nop; 355 356 if (nowpp != NULL) 357 nowp = *nowpp; 358 else 359 nowp = NULL; 360 if (nopp != NULL) 361 nop = *nopp; 362 else 363 nop = NULL; 364 if (owp == NULL && nowp != NULL) { 365 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 366 LIST_INIT(&nowp->nfsow_open); 367 nowp->nfsow_clp = clp; 368 nowp->nfsow_seqid = 0; 369 nowp->nfsow_defunct = 0; 370 nfscl_lockinit(&nowp->nfsow_rwlock); 371 if (dp != NULL) { 372 nfsstatsv1.cllocalopenowners++; 373 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 374 } else { 375 nfsstatsv1.clopenowners++; 376 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 377 } 378 owp = *owpp = nowp; 379 *nowpp = NULL; 380 if (newonep != NULL) 381 *newonep = 1; 382 } 383 384 /* If an fhp has been specified, create an Open as well. */ 385 if (fhp != NULL) { 386 /* and look for the correct open, based upon FH */ 387 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 388 if (op->nfso_fhlen == fhlen && 389 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 390 break; 391 } 392 if (op == NULL && nop != NULL) { 393 nop->nfso_own = owp; 394 nop->nfso_mode = 0; 395 nop->nfso_opencnt = 0; 396 nop->nfso_posixlock = 1; 397 nop->nfso_fhlen = fhlen; 398 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 399 LIST_INIT(&nop->nfso_lock); 400 nop->nfso_stateid.seqid = 0; 401 nop->nfso_stateid.other[0] = 0; 402 nop->nfso_stateid.other[1] = 0; 403 nop->nfso_stateid.other[2] = 0; 404 KASSERT(cred != NULL, ("%s: cred NULL\n", __func__)); 405 newnfs_copyincred(cred, &nop->nfso_cred); 406 if (dp != NULL) { 407 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 408 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 409 nfsdl_list); 410 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 411 nfsstatsv1.cllocalopens++; 412 } else { 413 nfsstatsv1.clopens++; 414 } 415 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 416 *opp = nop; 417 *nopp = NULL; 418 if (newonep != NULL) 419 *newonep = 1; 420 } else { 421 *opp = op; 422 } 423 } 424 } 425 426 /* 427 * Called to find/add a delegation to a client. 428 */ 429 APPLESTATIC int 430 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 431 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 432 { 433 struct nfscldeleg *dp = *dpp, *tdp; 434 435 /* 436 * First, if we have received a Read delegation for a file on a 437 * read/write file system, just return it, because they aren't 438 * useful, imho. 439 */ 440 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) && 441 (dp->nfsdl_flags & NFSCLDL_READ)) { 442 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p); 443 free(dp, M_NFSCLDELEG); 444 *dpp = NULL; 445 return (0); 446 } 447 448 /* Look for the correct deleg, based upon FH */ 449 NFSLOCKCLSTATE(); 450 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 451 if (tdp == NULL) { 452 if (dp == NULL) { 453 NFSUNLOCKCLSTATE(); 454 return (NFSERR_BADSTATEID); 455 } 456 *dpp = NULL; 457 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 458 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 459 nfsdl_hash); 460 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 461 nfsstatsv1.cldelegates++; 462 nfscl_delegcnt++; 463 } else { 464 /* 465 * Delegation already exists, what do we do if a new one?? 466 */ 467 if (dp != NULL) { 468 printf("Deleg already exists!\n"); 469 free(dp, M_NFSCLDELEG); 470 *dpp = NULL; 471 } else { 472 *dpp = tdp; 473 } 474 } 475 NFSUNLOCKCLSTATE(); 476 return (0); 477 } 478 479 /* 480 * Find a delegation for this file handle. Return NULL upon failure. 481 */ 482 static struct nfscldeleg * 483 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 484 { 485 struct nfscldeleg *dp; 486 487 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 488 if (dp->nfsdl_fhlen == fhlen && 489 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 490 break; 491 } 492 return (dp); 493 } 494 495 /* 496 * Get a stateid for an I/O operation. First, look for an open and iff 497 * found, return either a lockowner stateid or the open stateid. 498 * If no Open is found, just return error and the special stateid of all zeros. 499 */ 500 APPLESTATIC int 501 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 502 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 503 void **lckpp) 504 { 505 struct nfsclclient *clp; 506 struct nfsclowner *owp; 507 struct nfsclopen *op = NULL, *top; 508 struct nfscllockowner *lp; 509 struct nfscldeleg *dp; 510 struct nfsnode *np; 511 struct nfsmount *nmp; 512 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 513 int error, done; 514 515 *lckpp = NULL; 516 /* 517 * Initially, just set the special stateid of all zeros. 518 * (Don't do this for a DS, since the special stateid can't be used.) 519 */ 520 if (fords == 0) { 521 stateidp->seqid = 0; 522 stateidp->other[0] = 0; 523 stateidp->other[1] = 0; 524 stateidp->other[2] = 0; 525 } 526 if (vnode_vtype(vp) != VREG) 527 return (EISDIR); 528 np = VTONFS(vp); 529 nmp = VFSTONFS(vnode_mount(vp)); 530 NFSLOCKCLSTATE(); 531 clp = nfscl_findcl(nmp); 532 if (clp == NULL) { 533 NFSUNLOCKCLSTATE(); 534 return (EACCES); 535 } 536 537 /* 538 * Wait for recovery to complete. 539 */ 540 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 541 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 542 PZERO, "nfsrecvr", NULL); 543 544 /* 545 * First, look for a delegation. 546 */ 547 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 548 if (dp->nfsdl_fhlen == fhlen && 549 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 550 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 551 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 552 stateidp->seqid = dp->nfsdl_stateid.seqid; 553 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 554 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 555 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 556 if (!(np->n_flag & NDELEGRECALL)) { 557 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 558 nfsdl_list); 559 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 560 nfsdl_list); 561 dp->nfsdl_timestamp = NFSD_MONOSEC + 562 120; 563 dp->nfsdl_rwlock.nfslock_usecnt++; 564 *lckpp = (void *)&dp->nfsdl_rwlock; 565 } 566 NFSUNLOCKCLSTATE(); 567 return (0); 568 } 569 break; 570 } 571 } 572 573 if (p != NULL) { 574 /* 575 * If p != NULL, we want to search the parentage tree 576 * for a matching OpenOwner and use that. 577 */ 578 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 579 nfscl_filllockowner(NULL, own, F_POSIX); 580 else 581 nfscl_filllockowner(p->td_proc, own, F_POSIX); 582 lp = NULL; 583 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own, 584 mode, &lp, &op); 585 if (error == 0 && lp != NULL && fords == 0) { 586 /* Don't return a lock stateid for a DS. */ 587 stateidp->seqid = 588 lp->nfsl_stateid.seqid; 589 stateidp->other[0] = 590 lp->nfsl_stateid.other[0]; 591 stateidp->other[1] = 592 lp->nfsl_stateid.other[1]; 593 stateidp->other[2] = 594 lp->nfsl_stateid.other[2]; 595 NFSUNLOCKCLSTATE(); 596 return (0); 597 } 598 } 599 if (op == NULL) { 600 /* If not found, just look for any OpenOwner that will work. */ 601 top = NULL; 602 done = 0; 603 owp = LIST_FIRST(&clp->nfsc_owner); 604 while (!done && owp != NULL) { 605 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 606 if (op->nfso_fhlen == fhlen && 607 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) { 608 if (top == NULL && (op->nfso_mode & 609 NFSV4OPEN_ACCESSWRITE) != 0 && 610 (mode & NFSV4OPEN_ACCESSREAD) != 0) 611 top = op; 612 if ((mode & op->nfso_mode) == mode) { 613 done = 1; 614 break; 615 } 616 } 617 } 618 if (!done) 619 owp = LIST_NEXT(owp, nfsow_list); 620 } 621 if (!done) { 622 NFSCL_DEBUG(2, "openmode top=%p\n", top); 623 if (top == NULL || NFSHASOPENMODE(nmp)) { 624 NFSUNLOCKCLSTATE(); 625 return (ENOENT); 626 } else 627 op = top; 628 } 629 /* 630 * For read aheads or write behinds, use the open cred. 631 * A read ahead or write behind is indicated by p == NULL. 632 */ 633 if (p == NULL) 634 newnfs_copycred(&op->nfso_cred, cred); 635 } 636 637 /* 638 * No lock stateid, so return the open stateid. 639 */ 640 stateidp->seqid = op->nfso_stateid.seqid; 641 stateidp->other[0] = op->nfso_stateid.other[0]; 642 stateidp->other[1] = op->nfso_stateid.other[1]; 643 stateidp->other[2] = op->nfso_stateid.other[2]; 644 NFSUNLOCKCLSTATE(); 645 return (0); 646 } 647 648 /* 649 * Search for a matching file, mode and, optionally, lockowner. 650 */ 651 static int 652 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 653 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode, 654 struct nfscllockowner **lpp, struct nfsclopen **opp) 655 { 656 struct nfsclowner *owp; 657 struct nfsclopen *op, *rop, *rop2; 658 struct nfscllockowner *lp; 659 int keep_looping; 660 661 if (lpp != NULL) 662 *lpp = NULL; 663 /* 664 * rop will be set to the open to be returned. There are three 665 * variants of this, all for an open of the correct file: 666 * 1 - A match of lockown. 667 * 2 - A match of the openown, when no lockown match exists. 668 * 3 - A match for any open, if no openown or lockown match exists. 669 * Looking for #2 over #3 probably isn't necessary, but since 670 * RFC3530 is vague w.r.t. the relationship between openowners and 671 * lockowners, I think this is the safer way to go. 672 */ 673 rop = NULL; 674 rop2 = NULL; 675 keep_looping = 1; 676 /* Search the client list */ 677 owp = LIST_FIRST(ohp); 678 while (owp != NULL && keep_looping != 0) { 679 /* and look for the correct open */ 680 op = LIST_FIRST(&owp->nfsow_open); 681 while (op != NULL && keep_looping != 0) { 682 if (op->nfso_fhlen == fhlen && 683 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 684 && (op->nfso_mode & mode) == mode) { 685 if (lpp != NULL) { 686 /* Now look for a matching lockowner. */ 687 LIST_FOREACH(lp, &op->nfso_lock, 688 nfsl_list) { 689 if (!NFSBCMP(lp->nfsl_owner, 690 lockown, 691 NFSV4CL_LOCKNAMELEN)) { 692 *lpp = lp; 693 rop = op; 694 keep_looping = 0; 695 break; 696 } 697 } 698 } 699 if (rop == NULL && !NFSBCMP(owp->nfsow_owner, 700 openown, NFSV4CL_LOCKNAMELEN)) { 701 rop = op; 702 if (lpp == NULL) 703 keep_looping = 0; 704 } 705 if (rop2 == NULL) 706 rop2 = op; 707 } 708 op = LIST_NEXT(op, nfso_list); 709 } 710 owp = LIST_NEXT(owp, nfsow_list); 711 } 712 if (rop == NULL) 713 rop = rop2; 714 if (rop == NULL) 715 return (EBADF); 716 *opp = rop; 717 return (0); 718 } 719 720 /* 721 * Release use of an open owner. Called when open operations are done 722 * with the open owner. 723 */ 724 APPLESTATIC void 725 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp, 726 __unused int error, __unused int candelete, int unlocked) 727 { 728 729 if (owp == NULL) 730 return; 731 NFSLOCKCLSTATE(); 732 if (unlocked == 0) { 733 if (NFSHASONEOPENOWN(nmp)) 734 nfsv4_relref(&owp->nfsow_rwlock); 735 else 736 nfscl_lockunlock(&owp->nfsow_rwlock); 737 } 738 nfscl_clrelease(owp->nfsow_clp); 739 NFSUNLOCKCLSTATE(); 740 } 741 742 /* 743 * Release use of an open structure under an open owner. 744 */ 745 APPLESTATIC void 746 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error, 747 int candelete) 748 { 749 struct nfsclclient *clp; 750 struct nfsclowner *owp; 751 752 if (op == NULL) 753 return; 754 NFSLOCKCLSTATE(); 755 owp = op->nfso_own; 756 if (NFSHASONEOPENOWN(nmp)) 757 nfsv4_relref(&owp->nfsow_rwlock); 758 else 759 nfscl_lockunlock(&owp->nfsow_rwlock); 760 clp = owp->nfsow_clp; 761 if (error && candelete && op->nfso_opencnt == 0) 762 nfscl_freeopen(op, 0); 763 nfscl_clrelease(clp); 764 NFSUNLOCKCLSTATE(); 765 } 766 767 /* 768 * Called to get a clientid structure. It will optionally lock the 769 * client data structures to do the SetClientId/SetClientId_confirm, 770 * but will release that lock and return the clientid with a reference 771 * count on it. 772 * If the "cred" argument is NULL, a new clientid should not be created. 773 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 774 * be done. 775 * The start_renewthread argument tells nfscl_getcl() to start a renew 776 * thread if this creates a new clp. 777 * It always clpp with a reference count on it, unless returning an error. 778 */ 779 APPLESTATIC int 780 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p, 781 int start_renewthread, struct nfsclclient **clpp) 782 { 783 struct nfsclclient *clp; 784 struct nfsclclient *newclp = NULL; 785 struct nfsmount *nmp; 786 char uuid[HOSTUUIDLEN]; 787 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 788 u_int16_t idlen = 0; 789 790 nmp = VFSTONFS(mp); 791 if (cred != NULL) { 792 getcredhostuuid(cred, uuid, sizeof uuid); 793 idlen = strlen(uuid); 794 if (idlen > 0) 795 idlen += sizeof (u_int64_t); 796 else 797 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 798 newclp = malloc( 799 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 800 M_WAITOK | M_ZERO); 801 } 802 NFSLOCKCLSTATE(); 803 /* 804 * If a forced dismount is already in progress, don't 805 * allocate a new clientid and get out now. For the case where 806 * clp != NULL, this is a harmless optimization. 807 */ 808 if (NFSCL_FORCEDISM(mp)) { 809 NFSUNLOCKCLSTATE(); 810 if (newclp != NULL) 811 free(newclp, M_NFSCLCLIENT); 812 return (EBADF); 813 } 814 clp = nmp->nm_clp; 815 if (clp == NULL) { 816 if (newclp == NULL) { 817 NFSUNLOCKCLSTATE(); 818 return (EACCES); 819 } 820 clp = newclp; 821 clp->nfsc_idlen = idlen; 822 LIST_INIT(&clp->nfsc_owner); 823 TAILQ_INIT(&clp->nfsc_deleg); 824 TAILQ_INIT(&clp->nfsc_layout); 825 LIST_INIT(&clp->nfsc_devinfo); 826 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 827 LIST_INIT(&clp->nfsc_deleghash[i]); 828 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 829 LIST_INIT(&clp->nfsc_layouthash[i]); 830 clp->nfsc_flags = NFSCLFLAGS_INITED; 831 clp->nfsc_clientidrev = 1; 832 clp->nfsc_cbident = nfscl_nextcbident(); 833 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 834 clp->nfsc_idlen); 835 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 836 nmp->nm_clp = clp; 837 clp->nfsc_nmp = nmp; 838 NFSUNLOCKCLSTATE(); 839 if (start_renewthread != 0) 840 nfscl_start_renewthread(clp); 841 } else { 842 NFSUNLOCKCLSTATE(); 843 if (newclp != NULL) 844 free(newclp, M_NFSCLCLIENT); 845 } 846 NFSLOCKCLSTATE(); 847 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 848 !NFSCL_FORCEDISM(mp)) 849 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 850 NFSCLSTATEMUTEXPTR, mp); 851 if (igotlock == 0) { 852 /* 853 * Call nfsv4_lock() with "iwantlock == 0" so that it will 854 * wait for a pending exclusive lock request. This gives the 855 * exclusive lock request priority over this shared lock 856 * request. 857 * An exclusive lock on nfsc_lock is used mainly for server 858 * crash recoveries. 859 */ 860 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp); 861 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 862 } 863 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) { 864 /* 865 * Both nfsv4_lock() and nfsv4_getref() know to check 866 * for NFSCL_FORCEDISM() and return without sleeping to 867 * wait for the exclusive lock to be released, since it 868 * might be held by nfscl_umount() and we need to get out 869 * now for that case and not wait until nfscl_umount() 870 * releases it. 871 */ 872 NFSUNLOCKCLSTATE(); 873 return (EBADF); 874 } 875 NFSUNLOCKCLSTATE(); 876 877 /* 878 * If it needs a clientid, do the setclientid now. 879 */ 880 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 881 if (!igotlock) 882 panic("nfscl_clget"); 883 if (p == NULL || cred == NULL) { 884 NFSLOCKCLSTATE(); 885 nfsv4_unlock(&clp->nfsc_lock, 0); 886 NFSUNLOCKCLSTATE(); 887 return (EACCES); 888 } 889 /* 890 * If RFC3530 Sec. 14.2.33 is taken literally, 891 * NFSERR_CLIDINUSE will be returned persistently for the 892 * case where a new mount of the same file system is using 893 * a different principal. In practice, NFSERR_CLIDINUSE is 894 * only returned when there is outstanding unexpired state 895 * on the clientid. As such, try for twice the lease 896 * interval, if we know what that is. Otherwise, make a 897 * wild ass guess. 898 * The case of returning NFSERR_STALECLIENTID is far less 899 * likely, but might occur if there is a significant delay 900 * between doing the SetClientID and SetClientIDConfirm Ops, 901 * such that the server throws away the clientid before 902 * receiving the SetClientIDConfirm. 903 */ 904 if (clp->nfsc_renew > 0) 905 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 906 else 907 clidinusedelay = 120; 908 trystalecnt = 3; 909 do { 910 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 911 if (error == NFSERR_STALECLIENTID || 912 error == NFSERR_STALEDONTRECOVER || 913 error == NFSERR_BADSESSION || 914 error == NFSERR_CLIDINUSE) { 915 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 916 } 917 } while (((error == NFSERR_STALECLIENTID || 918 error == NFSERR_BADSESSION || 919 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 920 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 921 if (error) { 922 NFSLOCKCLSTATE(); 923 nfsv4_unlock(&clp->nfsc_lock, 0); 924 NFSUNLOCKCLSTATE(); 925 return (error); 926 } 927 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 928 } 929 if (igotlock) { 930 NFSLOCKCLSTATE(); 931 nfsv4_unlock(&clp->nfsc_lock, 1); 932 NFSUNLOCKCLSTATE(); 933 } 934 935 *clpp = clp; 936 return (0); 937 } 938 939 /* 940 * Get a reference to a clientid and return it, if valid. 941 */ 942 APPLESTATIC struct nfsclclient * 943 nfscl_findcl(struct nfsmount *nmp) 944 { 945 struct nfsclclient *clp; 946 947 clp = nmp->nm_clp; 948 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 949 return (NULL); 950 return (clp); 951 } 952 953 /* 954 * Release the clientid structure. It may be locked or reference counted. 955 */ 956 static void 957 nfscl_clrelease(struct nfsclclient *clp) 958 { 959 960 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 961 nfsv4_unlock(&clp->nfsc_lock, 0); 962 else 963 nfsv4_relref(&clp->nfsc_lock); 964 } 965 966 /* 967 * External call for nfscl_clrelease. 968 */ 969 APPLESTATIC void 970 nfscl_clientrelease(struct nfsclclient *clp) 971 { 972 973 NFSLOCKCLSTATE(); 974 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 975 nfsv4_unlock(&clp->nfsc_lock, 0); 976 else 977 nfsv4_relref(&clp->nfsc_lock); 978 NFSUNLOCKCLSTATE(); 979 } 980 981 /* 982 * Called when wanting to lock a byte region. 983 */ 984 APPLESTATIC int 985 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 986 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 987 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 988 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 989 { 990 struct nfscllockowner *lp; 991 struct nfsclopen *op; 992 struct nfsclclient *clp; 993 struct nfscllockowner *nlp; 994 struct nfscllock *nlop, *otherlop; 995 struct nfscldeleg *dp = NULL, *ldp = NULL; 996 struct nfscllockownerhead *lhp = NULL; 997 struct nfsnode *np; 998 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 999 u_int8_t *openownp; 1000 int error = 0, ret, donelocally = 0; 1001 u_int32_t mode; 1002 1003 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 1004 mode = 0; 1005 np = VTONFS(vp); 1006 *lpp = NULL; 1007 lp = NULL; 1008 *newonep = 0; 1009 *donelocallyp = 0; 1010 1011 /* 1012 * Might need these, so MALLOC them now, to 1013 * avoid a tsleep() in MALLOC later. 1014 */ 1015 nlp = malloc( 1016 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 1017 otherlop = malloc( 1018 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1019 nlop = malloc( 1020 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1021 nlop->nfslo_type = type; 1022 nlop->nfslo_first = off; 1023 if (len == NFS64BITSSET) { 1024 nlop->nfslo_end = NFS64BITSSET; 1025 } else { 1026 nlop->nfslo_end = off + len; 1027 if (nlop->nfslo_end <= nlop->nfslo_first) 1028 error = NFSERR_INVAL; 1029 } 1030 1031 if (!error) { 1032 if (recovery) 1033 clp = rclp; 1034 else 1035 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1036 } 1037 if (error) { 1038 free(nlp, M_NFSCLLOCKOWNER); 1039 free(otherlop, M_NFSCLLOCK); 1040 free(nlop, M_NFSCLLOCK); 1041 return (error); 1042 } 1043 1044 op = NULL; 1045 if (recovery) { 1046 ownp = rownp; 1047 openownp = ropenownp; 1048 } else { 1049 nfscl_filllockowner(id, own, flags); 1050 ownp = own; 1051 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 1052 nfscl_filllockowner(NULL, openown, F_POSIX); 1053 else 1054 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 1055 openownp = openown; 1056 } 1057 if (!recovery) { 1058 NFSLOCKCLSTATE(); 1059 /* 1060 * First, search for a delegation. If one exists for this file, 1061 * the lock can be done locally against it, so long as there 1062 * isn't a local lock conflict. 1063 */ 1064 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1065 np->n_fhp->nfh_len); 1066 /* Just sanity check for correct type of delegation */ 1067 if (dp != NULL && ((dp->nfsdl_flags & 1068 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 1069 (type == F_WRLCK && 1070 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 1071 dp = NULL; 1072 } 1073 if (dp != NULL) { 1074 /* Now, find an open and maybe a lockowner. */ 1075 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 1076 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 1077 if (ret) 1078 ret = nfscl_getopen(&clp->nfsc_owner, 1079 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1080 ownp, mode, NULL, &op); 1081 if (!ret) { 1082 lhp = &dp->nfsdl_lock; 1083 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 1084 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 1085 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 1086 donelocally = 1; 1087 } else { 1088 dp = NULL; 1089 } 1090 } 1091 if (!donelocally) { 1092 /* 1093 * Get the related Open and maybe lockowner. 1094 */ 1095 error = nfscl_getopen(&clp->nfsc_owner, 1096 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1097 ownp, mode, &lp, &op); 1098 if (!error) 1099 lhp = &op->nfso_lock; 1100 } 1101 if (!error && !recovery) 1102 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1103 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1104 if (error) { 1105 if (!recovery) { 1106 nfscl_clrelease(clp); 1107 NFSUNLOCKCLSTATE(); 1108 } 1109 free(nlp, M_NFSCLLOCKOWNER); 1110 free(otherlop, M_NFSCLLOCK); 1111 free(nlop, M_NFSCLLOCK); 1112 return (error); 1113 } 1114 1115 /* 1116 * Ok, see if a lockowner exists and create one, as required. 1117 */ 1118 if (lp == NULL) 1119 LIST_FOREACH(lp, lhp, nfsl_list) { 1120 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1121 break; 1122 } 1123 if (lp == NULL) { 1124 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1125 if (recovery) 1126 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1127 NFSV4CL_LOCKNAMELEN); 1128 else 1129 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1130 NFSV4CL_LOCKNAMELEN); 1131 nlp->nfsl_seqid = 0; 1132 nlp->nfsl_lockflags = flags; 1133 nlp->nfsl_inprog = NULL; 1134 nfscl_lockinit(&nlp->nfsl_rwlock); 1135 LIST_INIT(&nlp->nfsl_lock); 1136 if (donelocally) { 1137 nlp->nfsl_open = NULL; 1138 nfsstatsv1.cllocallockowners++; 1139 } else { 1140 nlp->nfsl_open = op; 1141 nfsstatsv1.cllockowners++; 1142 } 1143 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1144 lp = nlp; 1145 nlp = NULL; 1146 *newonep = 1; 1147 } 1148 1149 /* 1150 * Now, update the byte ranges for locks. 1151 */ 1152 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1153 if (!ret) 1154 donelocally = 1; 1155 if (donelocally) { 1156 *donelocallyp = 1; 1157 if (!recovery) 1158 nfscl_clrelease(clp); 1159 } else { 1160 /* 1161 * Serial modifications on the lock owner for multiple threads 1162 * for the same process using a read/write lock. 1163 */ 1164 if (!recovery) 1165 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1166 } 1167 if (!recovery) 1168 NFSUNLOCKCLSTATE(); 1169 1170 if (nlp) 1171 free(nlp, M_NFSCLLOCKOWNER); 1172 if (nlop) 1173 free(nlop, M_NFSCLLOCK); 1174 if (otherlop) 1175 free(otherlop, M_NFSCLLOCK); 1176 1177 *lpp = lp; 1178 return (0); 1179 } 1180 1181 /* 1182 * Called to unlock a byte range, for LockU. 1183 */ 1184 APPLESTATIC int 1185 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1186 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1187 struct nfsclclient *clp, void *id, int flags, 1188 struct nfscllockowner **lpp, int *dorpcp) 1189 { 1190 struct nfscllockowner *lp; 1191 struct nfsclowner *owp; 1192 struct nfsclopen *op; 1193 struct nfscllock *nlop, *other_lop = NULL; 1194 struct nfscldeleg *dp; 1195 struct nfsnode *np; 1196 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1197 int ret = 0, fnd; 1198 1199 np = VTONFS(vp); 1200 *lpp = NULL; 1201 *dorpcp = 0; 1202 1203 /* 1204 * Might need these, so MALLOC them now, to 1205 * avoid a tsleep() in MALLOC later. 1206 */ 1207 nlop = malloc( 1208 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1209 nlop->nfslo_type = F_UNLCK; 1210 nlop->nfslo_first = off; 1211 if (len == NFS64BITSSET) { 1212 nlop->nfslo_end = NFS64BITSSET; 1213 } else { 1214 nlop->nfslo_end = off + len; 1215 if (nlop->nfslo_end <= nlop->nfslo_first) { 1216 free(nlop, M_NFSCLLOCK); 1217 return (NFSERR_INVAL); 1218 } 1219 } 1220 if (callcnt == 0) { 1221 other_lop = malloc( 1222 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1223 *other_lop = *nlop; 1224 } 1225 nfscl_filllockowner(id, own, flags); 1226 dp = NULL; 1227 NFSLOCKCLSTATE(); 1228 if (callcnt == 0) 1229 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1230 np->n_fhp->nfh_len); 1231 1232 /* 1233 * First, unlock any local regions on a delegation. 1234 */ 1235 if (dp != NULL) { 1236 /* Look for this lockowner. */ 1237 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1238 if (!NFSBCMP(lp->nfsl_owner, own, 1239 NFSV4CL_LOCKNAMELEN)) 1240 break; 1241 } 1242 if (lp != NULL) 1243 /* Use other_lop, so nlop is still available */ 1244 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1245 } 1246 1247 /* 1248 * Now, find a matching open/lockowner that hasn't already been done, 1249 * as marked by nfsl_inprog. 1250 */ 1251 lp = NULL; 1252 fnd = 0; 1253 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1254 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1255 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1256 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1257 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1258 if (lp->nfsl_inprog == NULL && 1259 !NFSBCMP(lp->nfsl_owner, own, 1260 NFSV4CL_LOCKNAMELEN)) { 1261 fnd = 1; 1262 break; 1263 } 1264 } 1265 if (fnd) 1266 break; 1267 } 1268 } 1269 if (fnd) 1270 break; 1271 } 1272 1273 if (lp != NULL) { 1274 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1275 if (ret) 1276 *dorpcp = 1; 1277 /* 1278 * Serial modifications on the lock owner for multiple 1279 * threads for the same process using a read/write lock. 1280 */ 1281 lp->nfsl_inprog = p; 1282 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1283 *lpp = lp; 1284 } 1285 NFSUNLOCKCLSTATE(); 1286 if (nlop) 1287 free(nlop, M_NFSCLLOCK); 1288 if (other_lop) 1289 free(other_lop, M_NFSCLLOCK); 1290 return (0); 1291 } 1292 1293 /* 1294 * Release all lockowners marked in progess for this process and file. 1295 */ 1296 APPLESTATIC void 1297 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1298 void *id, int flags) 1299 { 1300 struct nfsclowner *owp; 1301 struct nfsclopen *op; 1302 struct nfscllockowner *lp; 1303 struct nfsnode *np; 1304 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1305 1306 np = VTONFS(vp); 1307 nfscl_filllockowner(id, own, flags); 1308 NFSLOCKCLSTATE(); 1309 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1310 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1311 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1312 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1313 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1314 if (lp->nfsl_inprog == p && 1315 !NFSBCMP(lp->nfsl_owner, own, 1316 NFSV4CL_LOCKNAMELEN)) { 1317 lp->nfsl_inprog = NULL; 1318 nfscl_lockunlock(&lp->nfsl_rwlock); 1319 } 1320 } 1321 } 1322 } 1323 } 1324 nfscl_clrelease(clp); 1325 NFSUNLOCKCLSTATE(); 1326 } 1327 1328 /* 1329 * Called to find out if any bytes within the byte range specified are 1330 * write locked by the calling process. Used to determine if flushing 1331 * is required before a LockU. 1332 * If in doubt, return 1, so the flush will occur. 1333 */ 1334 APPLESTATIC int 1335 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1336 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1337 { 1338 struct nfsclowner *owp; 1339 struct nfscllockowner *lp; 1340 struct nfsclopen *op; 1341 struct nfsclclient *clp; 1342 struct nfscllock *lop; 1343 struct nfscldeleg *dp; 1344 struct nfsnode *np; 1345 u_int64_t off, end; 1346 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1347 int error = 0; 1348 1349 np = VTONFS(vp); 1350 switch (fl->l_whence) { 1351 case SEEK_SET: 1352 case SEEK_CUR: 1353 /* 1354 * Caller is responsible for adding any necessary offset 1355 * when SEEK_CUR is used. 1356 */ 1357 off = fl->l_start; 1358 break; 1359 case SEEK_END: 1360 off = np->n_size + fl->l_start; 1361 break; 1362 default: 1363 return (1); 1364 } 1365 if (fl->l_len != 0) { 1366 end = off + fl->l_len; 1367 if (end < off) 1368 return (1); 1369 } else { 1370 end = NFS64BITSSET; 1371 } 1372 1373 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1374 if (error) 1375 return (1); 1376 nfscl_filllockowner(id, own, flags); 1377 NFSLOCKCLSTATE(); 1378 1379 /* 1380 * First check the delegation locks. 1381 */ 1382 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1383 if (dp != NULL) { 1384 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1385 if (!NFSBCMP(lp->nfsl_owner, own, 1386 NFSV4CL_LOCKNAMELEN)) 1387 break; 1388 } 1389 if (lp != NULL) { 1390 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1391 if (lop->nfslo_first >= end) 1392 break; 1393 if (lop->nfslo_end <= off) 1394 continue; 1395 if (lop->nfslo_type == F_WRLCK) { 1396 nfscl_clrelease(clp); 1397 NFSUNLOCKCLSTATE(); 1398 return (1); 1399 } 1400 } 1401 } 1402 } 1403 1404 /* 1405 * Now, check state against the server. 1406 */ 1407 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1408 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1409 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1410 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1411 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1412 if (!NFSBCMP(lp->nfsl_owner, own, 1413 NFSV4CL_LOCKNAMELEN)) 1414 break; 1415 } 1416 if (lp != NULL) { 1417 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1418 if (lop->nfslo_first >= end) 1419 break; 1420 if (lop->nfslo_end <= off) 1421 continue; 1422 if (lop->nfslo_type == F_WRLCK) { 1423 nfscl_clrelease(clp); 1424 NFSUNLOCKCLSTATE(); 1425 return (1); 1426 } 1427 } 1428 } 1429 } 1430 } 1431 } 1432 nfscl_clrelease(clp); 1433 NFSUNLOCKCLSTATE(); 1434 return (0); 1435 } 1436 1437 /* 1438 * Release a byte range lock owner structure. 1439 */ 1440 APPLESTATIC void 1441 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1442 { 1443 struct nfsclclient *clp; 1444 1445 if (lp == NULL) 1446 return; 1447 NFSLOCKCLSTATE(); 1448 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1449 if (error != 0 && candelete && 1450 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1451 nfscl_freelockowner(lp, 0); 1452 else 1453 nfscl_lockunlock(&lp->nfsl_rwlock); 1454 nfscl_clrelease(clp); 1455 NFSUNLOCKCLSTATE(); 1456 } 1457 1458 /* 1459 * Free up an open structure and any associated byte range lock structures. 1460 */ 1461 APPLESTATIC void 1462 nfscl_freeopen(struct nfsclopen *op, int local) 1463 { 1464 1465 LIST_REMOVE(op, nfso_list); 1466 nfscl_freealllocks(&op->nfso_lock, local); 1467 free(op, M_NFSCLOPEN); 1468 if (local) 1469 nfsstatsv1.cllocalopens--; 1470 else 1471 nfsstatsv1.clopens--; 1472 } 1473 1474 /* 1475 * Free up all lock owners and associated locks. 1476 */ 1477 static void 1478 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1479 { 1480 struct nfscllockowner *lp, *nlp; 1481 1482 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1483 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1484 panic("nfscllckw"); 1485 nfscl_freelockowner(lp, local); 1486 } 1487 } 1488 1489 /* 1490 * Called for an Open when NFSERR_EXPIRED is received from the server. 1491 * If there are no byte range locks nor a Share Deny lost, try to do a 1492 * fresh Open. Otherwise, free the open. 1493 */ 1494 static int 1495 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1496 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1497 { 1498 struct nfscllockowner *lp; 1499 struct nfscldeleg *dp; 1500 int mustdelete = 0, error; 1501 1502 /* 1503 * Look for any byte range lock(s). 1504 */ 1505 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1506 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1507 mustdelete = 1; 1508 break; 1509 } 1510 } 1511 1512 /* 1513 * If no byte range lock(s) nor a Share deny, try to re-open. 1514 */ 1515 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1516 newnfs_copycred(&op->nfso_cred, cred); 1517 dp = NULL; 1518 error = nfsrpc_reopen(nmp, op->nfso_fh, 1519 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1520 if (error) { 1521 mustdelete = 1; 1522 if (dp != NULL) { 1523 free(dp, M_NFSCLDELEG); 1524 dp = NULL; 1525 } 1526 } 1527 if (dp != NULL) 1528 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1529 op->nfso_fhlen, cred, p, &dp); 1530 } 1531 1532 /* 1533 * If a byte range lock or Share deny or couldn't re-open, free it. 1534 */ 1535 if (mustdelete) 1536 nfscl_freeopen(op, 0); 1537 return (mustdelete); 1538 } 1539 1540 /* 1541 * Free up an open owner structure. 1542 */ 1543 static void 1544 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1545 { 1546 1547 LIST_REMOVE(owp, nfsow_list); 1548 free(owp, M_NFSCLOWNER); 1549 if (local) 1550 nfsstatsv1.cllocalopenowners--; 1551 else 1552 nfsstatsv1.clopenowners--; 1553 } 1554 1555 /* 1556 * Free up a byte range lock owner structure. 1557 */ 1558 APPLESTATIC void 1559 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1560 { 1561 struct nfscllock *lop, *nlop; 1562 1563 LIST_REMOVE(lp, nfsl_list); 1564 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1565 nfscl_freelock(lop, local); 1566 } 1567 free(lp, M_NFSCLLOCKOWNER); 1568 if (local) 1569 nfsstatsv1.cllocallockowners--; 1570 else 1571 nfsstatsv1.cllockowners--; 1572 } 1573 1574 /* 1575 * Free up a byte range lock structure. 1576 */ 1577 APPLESTATIC void 1578 nfscl_freelock(struct nfscllock *lop, int local) 1579 { 1580 1581 LIST_REMOVE(lop, nfslo_list); 1582 free(lop, M_NFSCLLOCK); 1583 if (local) 1584 nfsstatsv1.cllocallocks--; 1585 else 1586 nfsstatsv1.cllocks--; 1587 } 1588 1589 /* 1590 * Clean out the state related to a delegation. 1591 */ 1592 static void 1593 nfscl_cleandeleg(struct nfscldeleg *dp) 1594 { 1595 struct nfsclowner *owp, *nowp; 1596 struct nfsclopen *op; 1597 1598 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1599 op = LIST_FIRST(&owp->nfsow_open); 1600 if (op != NULL) { 1601 if (LIST_NEXT(op, nfso_list) != NULL) 1602 panic("nfscleandel"); 1603 nfscl_freeopen(op, 1); 1604 } 1605 nfscl_freeopenowner(owp, 1); 1606 } 1607 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1608 } 1609 1610 /* 1611 * Free a delegation. 1612 */ 1613 static void 1614 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1615 { 1616 1617 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1618 LIST_REMOVE(dp, nfsdl_hash); 1619 free(dp, M_NFSCLDELEG); 1620 nfsstatsv1.cldelegates--; 1621 nfscl_delegcnt--; 1622 } 1623 1624 /* 1625 * Free up all state related to this client structure. 1626 */ 1627 static void 1628 nfscl_cleanclient(struct nfsclclient *clp) 1629 { 1630 struct nfsclowner *owp, *nowp; 1631 struct nfsclopen *op, *nop; 1632 struct nfscllayout *lyp, *nlyp; 1633 struct nfscldevinfo *dip, *ndip; 1634 1635 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 1636 nfscl_freelayout(lyp); 1637 1638 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) 1639 nfscl_freedevinfo(dip); 1640 1641 /* Now, all the OpenOwners, etc. */ 1642 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1643 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1644 nfscl_freeopen(op, 0); 1645 } 1646 nfscl_freeopenowner(owp, 0); 1647 } 1648 } 1649 1650 /* 1651 * Called when an NFSERR_EXPIRED is received from the server. 1652 */ 1653 static void 1654 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1655 struct ucred *cred, NFSPROC_T *p) 1656 { 1657 struct nfsclowner *owp, *nowp, *towp; 1658 struct nfsclopen *op, *nop, *top; 1659 struct nfscldeleg *dp, *ndp; 1660 int ret, printed = 0; 1661 1662 /* 1663 * First, merge locally issued Opens into the list for the server. 1664 */ 1665 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1666 while (dp != NULL) { 1667 ndp = TAILQ_NEXT(dp, nfsdl_list); 1668 owp = LIST_FIRST(&dp->nfsdl_owner); 1669 while (owp != NULL) { 1670 nowp = LIST_NEXT(owp, nfsow_list); 1671 op = LIST_FIRST(&owp->nfsow_open); 1672 if (op != NULL) { 1673 if (LIST_NEXT(op, nfso_list) != NULL) 1674 panic("nfsclexp"); 1675 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1676 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1677 NFSV4CL_LOCKNAMELEN)) 1678 break; 1679 } 1680 if (towp != NULL) { 1681 /* Merge opens in */ 1682 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1683 if (top->nfso_fhlen == op->nfso_fhlen && 1684 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1685 op->nfso_fhlen)) { 1686 top->nfso_mode |= op->nfso_mode; 1687 top->nfso_opencnt += op->nfso_opencnt; 1688 break; 1689 } 1690 } 1691 if (top == NULL) { 1692 /* Just add the open to the owner list */ 1693 LIST_REMOVE(op, nfso_list); 1694 op->nfso_own = towp; 1695 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1696 nfsstatsv1.cllocalopens--; 1697 nfsstatsv1.clopens++; 1698 } 1699 } else { 1700 /* Just add the openowner to the client list */ 1701 LIST_REMOVE(owp, nfsow_list); 1702 owp->nfsow_clp = clp; 1703 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1704 nfsstatsv1.cllocalopenowners--; 1705 nfsstatsv1.clopenowners++; 1706 nfsstatsv1.cllocalopens--; 1707 nfsstatsv1.clopens++; 1708 } 1709 } 1710 owp = nowp; 1711 } 1712 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1713 printed = 1; 1714 printf("nfsv4 expired locks lost\n"); 1715 } 1716 nfscl_cleandeleg(dp); 1717 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1718 dp = ndp; 1719 } 1720 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1721 panic("nfsclexp"); 1722 1723 /* 1724 * Now, try and reopen against the server. 1725 */ 1726 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1727 owp->nfsow_seqid = 0; 1728 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1729 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1730 if (ret && !printed) { 1731 printed = 1; 1732 printf("nfsv4 expired locks lost\n"); 1733 } 1734 } 1735 if (LIST_EMPTY(&owp->nfsow_open)) 1736 nfscl_freeopenowner(owp, 0); 1737 } 1738 } 1739 1740 /* 1741 * This function must be called after the process represented by "own" has 1742 * exited. Must be called with CLSTATE lock held. 1743 */ 1744 static void 1745 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1746 { 1747 struct nfsclowner *owp, *nowp; 1748 struct nfscllockowner *lp, *nlp; 1749 struct nfscldeleg *dp; 1750 1751 /* First, get rid of local locks on delegations. */ 1752 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1753 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1754 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1755 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1756 panic("nfscllckw"); 1757 nfscl_freelockowner(lp, 1); 1758 } 1759 } 1760 } 1761 owp = LIST_FIRST(&clp->nfsc_owner); 1762 while (owp != NULL) { 1763 nowp = LIST_NEXT(owp, nfsow_list); 1764 if (!NFSBCMP(owp->nfsow_owner, own, 1765 NFSV4CL_LOCKNAMELEN)) { 1766 /* 1767 * If there are children that haven't closed the 1768 * file descriptors yet, the opens will still be 1769 * here. For that case, let the renew thread clear 1770 * out the OpenOwner later. 1771 */ 1772 if (LIST_EMPTY(&owp->nfsow_open)) 1773 nfscl_freeopenowner(owp, 0); 1774 else 1775 owp->nfsow_defunct = 1; 1776 } 1777 owp = nowp; 1778 } 1779 } 1780 1781 /* 1782 * Find open/lock owners for processes that have exited. 1783 */ 1784 static void 1785 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1786 { 1787 struct nfsclowner *owp, *nowp; 1788 struct nfsclopen *op; 1789 struct nfscllockowner *lp, *nlp; 1790 struct nfscldeleg *dp; 1791 1792 /* 1793 * All the pidhash locks must be acquired, since they are sx locks 1794 * and must be acquired before the mutexes. The pid(s) that will 1795 * be used aren't known yet, so all the locks need to be acquired. 1796 * Fortunately, this function is only performed once/sec. 1797 */ 1798 pidhash_slockall(); 1799 NFSLOCKCLSTATE(); 1800 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1801 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1802 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1803 if (LIST_EMPTY(&lp->nfsl_lock)) 1804 nfscl_emptylockowner(lp, lhp); 1805 } 1806 } 1807 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1808 nfscl_cleanup_common(clp, owp->nfsow_owner); 1809 } 1810 1811 /* 1812 * For the single open_owner case, these lock owners need to be 1813 * checked to see if they still exist separately. 1814 * This is because nfscl_procdoesntexist() never returns true for 1815 * the single open_owner so that the above doesn't ever call 1816 * nfscl_cleanup_common(). 1817 */ 1818 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1819 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1820 if (nfscl_procdoesntexist(lp->nfsl_owner)) 1821 nfscl_cleanup_common(clp, lp->nfsl_owner); 1822 } 1823 } 1824 NFSUNLOCKCLSTATE(); 1825 pidhash_sunlockall(); 1826 } 1827 1828 /* 1829 * Take the empty lock owner and move it to the local lhp list if the 1830 * associated process no longer exists. 1831 */ 1832 static void 1833 nfscl_emptylockowner(struct nfscllockowner *lp, 1834 struct nfscllockownerfhhead *lhp) 1835 { 1836 struct nfscllockownerfh *lfhp, *mylfhp; 1837 struct nfscllockowner *nlp; 1838 int fnd_it; 1839 1840 /* If not a Posix lock owner, just return. */ 1841 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1842 return; 1843 1844 fnd_it = 0; 1845 mylfhp = NULL; 1846 /* 1847 * First, search to see if this lock owner is already in the list. 1848 * If it is, then the associated process no longer exists. 1849 */ 1850 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1851 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1852 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1853 lfhp->nfslfh_len)) 1854 mylfhp = lfhp; 1855 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1856 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1857 NFSV4CL_LOCKNAMELEN)) 1858 fnd_it = 1; 1859 } 1860 /* If not found, check if process still exists. */ 1861 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1862 return; 1863 1864 /* Move the lock owner over to the local list. */ 1865 if (mylfhp == NULL) { 1866 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1867 M_NOWAIT); 1868 if (mylfhp == NULL) 1869 return; 1870 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1871 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1872 mylfhp->nfslfh_len); 1873 LIST_INIT(&mylfhp->nfslfh_lock); 1874 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1875 } 1876 LIST_REMOVE(lp, nfsl_list); 1877 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1878 } 1879 1880 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1881 /* 1882 * Called from nfs umount to free up the clientid. 1883 */ 1884 APPLESTATIC void 1885 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1886 { 1887 struct nfsclclient *clp; 1888 struct ucred *cred; 1889 int igotlock; 1890 1891 /* 1892 * For the case that matters, this is the thread that set 1893 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1894 * done to ensure that any thread executing nfscl_getcl() after 1895 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1896 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1897 * explanation, courtesy of Alan Cox. 1898 * What follows is a snippet from Alan Cox's email at: 1899 * https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1900 * 1901 * 1. Set MNTK_UNMOUNTF 1902 * 2. Acquire a standard FreeBSD mutex "m". 1903 * 3. Update some data structures. 1904 * 4. Release mutex "m". 1905 * 1906 * Then, other threads that acquire "m" after step 4 has occurred will 1907 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1908 * step 2 may or may not see MNTK_UNMOUNTF as set. 1909 */ 1910 NFSLOCKCLSTATE(); 1911 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1912 fake_global++; 1913 NFSUNLOCKCLSTATE(); 1914 NFSLOCKCLSTATE(); 1915 } 1916 1917 clp = nmp->nm_clp; 1918 if (clp != NULL) { 1919 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1920 panic("nfscl umount"); 1921 1922 /* 1923 * First, handshake with the nfscl renew thread, to terminate 1924 * it. 1925 */ 1926 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1927 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1928 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1929 "nfsclumnt", hz); 1930 1931 /* 1932 * Now, get the exclusive lock on the client state, so 1933 * that no uses of the state are still in progress. 1934 */ 1935 do { 1936 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1937 NFSCLSTATEMUTEXPTR, NULL); 1938 } while (!igotlock); 1939 NFSUNLOCKCLSTATE(); 1940 1941 /* 1942 * Free up all the state. It will expire on the server, but 1943 * maybe we should do a SetClientId/SetClientIdConfirm so 1944 * the server throws it away? 1945 */ 1946 LIST_REMOVE(clp, nfsc_list); 1947 nfscl_delegreturnall(clp, p); 1948 cred = newnfs_getcred(); 1949 if (NFSHASNFSV4N(nmp)) { 1950 (void)nfsrpc_destroysession(nmp, clp, cred, p); 1951 (void)nfsrpc_destroyclient(nmp, clp, cred, p); 1952 } else 1953 (void)nfsrpc_setclient(nmp, clp, 0, cred, p); 1954 nfscl_cleanclient(clp); 1955 nmp->nm_clp = NULL; 1956 NFSFREECRED(cred); 1957 free(clp, M_NFSCLCLIENT); 1958 } else 1959 NFSUNLOCKCLSTATE(); 1960 } 1961 1962 /* 1963 * This function is called when a server replies with NFSERR_STALECLIENTID 1964 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 1965 * doing Opens and Locks with reclaim. If these fail, it deletes the 1966 * corresponding state. 1967 */ 1968 static void 1969 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1970 { 1971 struct nfsclowner *owp, *nowp; 1972 struct nfsclopen *op, *nop; 1973 struct nfscllockowner *lp, *nlp; 1974 struct nfscllock *lop, *nlop; 1975 struct nfscldeleg *dp, *ndp, *tdp; 1976 struct nfsmount *nmp; 1977 struct ucred *tcred; 1978 struct nfsclopenhead extra_open; 1979 struct nfscldeleghead extra_deleg; 1980 struct nfsreq *rep; 1981 u_int64_t len; 1982 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1983 int i, igotlock = 0, error, trycnt, firstlock; 1984 struct nfscllayout *lyp, *nlyp; 1985 1986 /* 1987 * First, lock the client structure, so everyone else will 1988 * block when trying to use state. 1989 */ 1990 NFSLOCKCLSTATE(); 1991 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1992 do { 1993 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1994 NFSCLSTATEMUTEXPTR, NULL); 1995 } while (!igotlock); 1996 NFSUNLOCKCLSTATE(); 1997 1998 nmp = clp->nfsc_nmp; 1999 if (nmp == NULL) 2000 panic("nfscl recover"); 2001 2002 /* 2003 * For now, just get rid of all layouts. There may be a need 2004 * to do LayoutCommit Ops with reclaim == true later. 2005 */ 2006 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 2007 nfscl_freelayout(lyp); 2008 TAILQ_INIT(&clp->nfsc_layout); 2009 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 2010 LIST_INIT(&clp->nfsc_layouthash[i]); 2011 2012 trycnt = 5; 2013 do { 2014 error = nfsrpc_setclient(nmp, clp, 1, cred, p); 2015 } while ((error == NFSERR_STALECLIENTID || 2016 error == NFSERR_BADSESSION || 2017 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2018 if (error) { 2019 NFSLOCKCLSTATE(); 2020 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 2021 NFSCLFLAGS_RECVRINPROG); 2022 wakeup(&clp->nfsc_flags); 2023 nfsv4_unlock(&clp->nfsc_lock, 0); 2024 NFSUNLOCKCLSTATE(); 2025 return; 2026 } 2027 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2028 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2029 2030 /* 2031 * Mark requests already queued on the server, so that they don't 2032 * initiate another recovery cycle. Any requests already in the 2033 * queue that handle state information will have the old stale 2034 * clientid/stateid and will get a NFSERR_STALESTATEID, 2035 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 2036 * This will be translated to NFSERR_STALEDONTRECOVER when 2037 * R_DONTRECOVER is set. 2038 */ 2039 NFSLOCKREQ(); 2040 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 2041 if (rep->r_nmp == nmp) 2042 rep->r_flags |= R_DONTRECOVER; 2043 } 2044 NFSUNLOCKREQ(); 2045 2046 /* 2047 * Now, mark all delegations "need reclaim". 2048 */ 2049 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 2050 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 2051 2052 TAILQ_INIT(&extra_deleg); 2053 LIST_INIT(&extra_open); 2054 /* 2055 * Now traverse the state lists, doing Open and Lock Reclaims. 2056 */ 2057 tcred = newnfs_getcred(); 2058 owp = LIST_FIRST(&clp->nfsc_owner); 2059 while (owp != NULL) { 2060 nowp = LIST_NEXT(owp, nfsow_list); 2061 owp->nfsow_seqid = 0; 2062 op = LIST_FIRST(&owp->nfsow_open); 2063 while (op != NULL) { 2064 nop = LIST_NEXT(op, nfso_list); 2065 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2066 /* Search for a delegation to reclaim with the open */ 2067 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2068 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2069 continue; 2070 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2071 mode = NFSV4OPEN_ACCESSWRITE; 2072 delegtype = NFSV4OPEN_DELEGATEWRITE; 2073 } else { 2074 mode = NFSV4OPEN_ACCESSREAD; 2075 delegtype = NFSV4OPEN_DELEGATEREAD; 2076 } 2077 if ((op->nfso_mode & mode) == mode && 2078 op->nfso_fhlen == dp->nfsdl_fhlen && 2079 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 2080 break; 2081 } 2082 ndp = dp; 2083 if (dp == NULL) 2084 delegtype = NFSV4OPEN_DELEGATENONE; 2085 newnfs_copycred(&op->nfso_cred, tcred); 2086 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2087 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2088 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2089 tcred, p); 2090 if (!error) { 2091 /* Handle any replied delegation */ 2092 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2093 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2094 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2095 mode = NFSV4OPEN_ACCESSWRITE; 2096 else 2097 mode = NFSV4OPEN_ACCESSREAD; 2098 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2099 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2100 continue; 2101 if ((op->nfso_mode & mode) == mode && 2102 op->nfso_fhlen == dp->nfsdl_fhlen && 2103 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2104 op->nfso_fhlen)) { 2105 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2106 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2107 dp->nfsdl_ace = ndp->nfsdl_ace; 2108 dp->nfsdl_change = ndp->nfsdl_change; 2109 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2110 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2111 dp->nfsdl_flags |= NFSCLDL_RECALL; 2112 free(ndp, M_NFSCLDELEG); 2113 ndp = NULL; 2114 break; 2115 } 2116 } 2117 } 2118 if (ndp != NULL) 2119 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2120 2121 /* and reclaim all byte range locks */ 2122 lp = LIST_FIRST(&op->nfso_lock); 2123 while (lp != NULL) { 2124 nlp = LIST_NEXT(lp, nfsl_list); 2125 lp->nfsl_seqid = 0; 2126 firstlock = 1; 2127 lop = LIST_FIRST(&lp->nfsl_lock); 2128 while (lop != NULL) { 2129 nlop = LIST_NEXT(lop, nfslo_list); 2130 if (lop->nfslo_end == NFS64BITSSET) 2131 len = NFS64BITSSET; 2132 else 2133 len = lop->nfslo_end - lop->nfslo_first; 2134 error = nfscl_trylock(nmp, NULL, 2135 op->nfso_fh, op->nfso_fhlen, lp, 2136 firstlock, 1, lop->nfslo_first, len, 2137 lop->nfslo_type, tcred, p); 2138 if (error != 0) 2139 nfscl_freelock(lop, 0); 2140 else 2141 firstlock = 0; 2142 lop = nlop; 2143 } 2144 /* If no locks, but a lockowner, just delete it. */ 2145 if (LIST_EMPTY(&lp->nfsl_lock)) 2146 nfscl_freelockowner(lp, 0); 2147 lp = nlp; 2148 } 2149 } 2150 } 2151 if (error != 0 && error != NFSERR_BADSESSION) 2152 nfscl_freeopen(op, 0); 2153 op = nop; 2154 } 2155 owp = nowp; 2156 } 2157 2158 /* 2159 * Now, try and get any delegations not yet reclaimed by cobbling 2160 * to-gether an appropriate open. 2161 */ 2162 nowp = NULL; 2163 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2164 while (dp != NULL) { 2165 ndp = TAILQ_NEXT(dp, nfsdl_list); 2166 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2167 if (nowp == NULL) { 2168 nowp = malloc( 2169 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2170 /* 2171 * Name must be as long an largest possible 2172 * NFSV4CL_LOCKNAMELEN. 12 for now. 2173 */ 2174 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2175 NFSV4CL_LOCKNAMELEN); 2176 LIST_INIT(&nowp->nfsow_open); 2177 nowp->nfsow_clp = clp; 2178 nowp->nfsow_seqid = 0; 2179 nowp->nfsow_defunct = 0; 2180 nfscl_lockinit(&nowp->nfsow_rwlock); 2181 } 2182 nop = NULL; 2183 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2184 nop = malloc(sizeof (struct nfsclopen) + 2185 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2186 nop->nfso_own = nowp; 2187 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2188 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2189 delegtype = NFSV4OPEN_DELEGATEWRITE; 2190 } else { 2191 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2192 delegtype = NFSV4OPEN_DELEGATEREAD; 2193 } 2194 nop->nfso_opencnt = 0; 2195 nop->nfso_posixlock = 1; 2196 nop->nfso_fhlen = dp->nfsdl_fhlen; 2197 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2198 LIST_INIT(&nop->nfso_lock); 2199 nop->nfso_stateid.seqid = 0; 2200 nop->nfso_stateid.other[0] = 0; 2201 nop->nfso_stateid.other[1] = 0; 2202 nop->nfso_stateid.other[2] = 0; 2203 newnfs_copycred(&dp->nfsdl_cred, tcred); 2204 newnfs_copyincred(tcred, &nop->nfso_cred); 2205 tdp = NULL; 2206 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2207 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2208 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2209 delegtype, tcred, p); 2210 if (tdp != NULL) { 2211 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2212 mode = NFSV4OPEN_ACCESSWRITE; 2213 else 2214 mode = NFSV4OPEN_ACCESSREAD; 2215 if ((nop->nfso_mode & mode) == mode && 2216 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2217 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2218 nop->nfso_fhlen)) { 2219 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2220 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2221 dp->nfsdl_ace = tdp->nfsdl_ace; 2222 dp->nfsdl_change = tdp->nfsdl_change; 2223 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2224 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2225 dp->nfsdl_flags |= NFSCLDL_RECALL; 2226 free(tdp, M_NFSCLDELEG); 2227 } else { 2228 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2229 } 2230 } 2231 } 2232 if (error) { 2233 if (nop != NULL) 2234 free(nop, M_NFSCLOPEN); 2235 /* 2236 * Couldn't reclaim it, so throw the state 2237 * away. Ouch!! 2238 */ 2239 nfscl_cleandeleg(dp); 2240 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2241 } else { 2242 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2243 } 2244 } 2245 dp = ndp; 2246 } 2247 2248 /* 2249 * Now, get rid of extra Opens and Delegations. 2250 */ 2251 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2252 do { 2253 newnfs_copycred(&op->nfso_cred, tcred); 2254 error = nfscl_tryclose(op, tcred, nmp, p); 2255 if (error == NFSERR_GRACE) 2256 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2257 } while (error == NFSERR_GRACE); 2258 LIST_REMOVE(op, nfso_list); 2259 free(op, M_NFSCLOPEN); 2260 } 2261 if (nowp != NULL) 2262 free(nowp, M_NFSCLOWNER); 2263 2264 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2265 do { 2266 newnfs_copycred(&dp->nfsdl_cred, tcred); 2267 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2268 if (error == NFSERR_GRACE) 2269 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2270 } while (error == NFSERR_GRACE); 2271 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2272 free(dp, M_NFSCLDELEG); 2273 } 2274 2275 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2276 if (NFSHASNFSV4N(nmp)) 2277 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2278 2279 NFSLOCKCLSTATE(); 2280 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2281 wakeup(&clp->nfsc_flags); 2282 nfsv4_unlock(&clp->nfsc_lock, 0); 2283 NFSUNLOCKCLSTATE(); 2284 NFSFREECRED(tcred); 2285 } 2286 2287 /* 2288 * This function is called when a server replies with NFSERR_EXPIRED. 2289 * It deletes all state for the client and does a fresh SetClientId/confirm. 2290 * XXX Someday it should post a signal to the process(es) that hold the 2291 * state, so they know that lock state has been lost. 2292 */ 2293 APPLESTATIC int 2294 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2295 { 2296 struct nfsmount *nmp; 2297 struct ucred *cred; 2298 int igotlock = 0, error, trycnt; 2299 2300 /* 2301 * If the clientid has gone away or a new SetClientid has already 2302 * been done, just return ok. 2303 */ 2304 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2305 return (0); 2306 2307 /* 2308 * First, lock the client structure, so everyone else will 2309 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2310 * that only one thread does the work. 2311 */ 2312 NFSLOCKCLSTATE(); 2313 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2314 do { 2315 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2316 NFSCLSTATEMUTEXPTR, NULL); 2317 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2318 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2319 if (igotlock) 2320 nfsv4_unlock(&clp->nfsc_lock, 0); 2321 NFSUNLOCKCLSTATE(); 2322 return (0); 2323 } 2324 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2325 NFSUNLOCKCLSTATE(); 2326 2327 nmp = clp->nfsc_nmp; 2328 if (nmp == NULL) 2329 panic("nfscl expired"); 2330 cred = newnfs_getcred(); 2331 trycnt = 5; 2332 do { 2333 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 2334 } while ((error == NFSERR_STALECLIENTID || 2335 error == NFSERR_BADSESSION || 2336 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2337 if (error) { 2338 NFSLOCKCLSTATE(); 2339 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2340 } else { 2341 /* 2342 * Expire the state for the client. 2343 */ 2344 nfscl_expireclient(clp, nmp, cred, p); 2345 NFSLOCKCLSTATE(); 2346 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2347 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2348 } 2349 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2350 wakeup(&clp->nfsc_flags); 2351 nfsv4_unlock(&clp->nfsc_lock, 0); 2352 NFSUNLOCKCLSTATE(); 2353 NFSFREECRED(cred); 2354 return (error); 2355 } 2356 2357 /* 2358 * This function inserts a lock in the list after insert_lop. 2359 */ 2360 static void 2361 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2362 struct nfscllock *insert_lop, int local) 2363 { 2364 2365 if ((struct nfscllockowner *)insert_lop == lp) 2366 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2367 else 2368 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2369 if (local) 2370 nfsstatsv1.cllocallocks++; 2371 else 2372 nfsstatsv1.cllocks++; 2373 } 2374 2375 /* 2376 * This function updates the locking for a lock owner and given file. It 2377 * maintains a list of lock ranges ordered on increasing file offset that 2378 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2379 * It always adds new_lop to the list and sometimes uses the one pointed 2380 * at by other_lopp. 2381 * Returns 1 if the locks were modified, 0 otherwise. 2382 */ 2383 static int 2384 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2385 struct nfscllock **other_lopp, int local) 2386 { 2387 struct nfscllock *new_lop = *new_lopp; 2388 struct nfscllock *lop, *tlop, *ilop; 2389 struct nfscllock *other_lop; 2390 int unlock = 0, modified = 0; 2391 u_int64_t tmp; 2392 2393 /* 2394 * Work down the list until the lock is merged. 2395 */ 2396 if (new_lop->nfslo_type == F_UNLCK) 2397 unlock = 1; 2398 ilop = (struct nfscllock *)lp; 2399 lop = LIST_FIRST(&lp->nfsl_lock); 2400 while (lop != NULL) { 2401 /* 2402 * Only check locks for this file that aren't before the start of 2403 * new lock's range. 2404 */ 2405 if (lop->nfslo_end >= new_lop->nfslo_first) { 2406 if (new_lop->nfslo_end < lop->nfslo_first) { 2407 /* 2408 * If the new lock ends before the start of the 2409 * current lock's range, no merge, just insert 2410 * the new lock. 2411 */ 2412 break; 2413 } 2414 if (new_lop->nfslo_type == lop->nfslo_type || 2415 (new_lop->nfslo_first <= lop->nfslo_first && 2416 new_lop->nfslo_end >= lop->nfslo_end)) { 2417 /* 2418 * This lock can be absorbed by the new lock/unlock. 2419 * This happens when it covers the entire range 2420 * of the old lock or is contiguous 2421 * with the old lock and is of the same type or an 2422 * unlock. 2423 */ 2424 if (new_lop->nfslo_type != lop->nfslo_type || 2425 new_lop->nfslo_first != lop->nfslo_first || 2426 new_lop->nfslo_end != lop->nfslo_end) 2427 modified = 1; 2428 if (lop->nfslo_first < new_lop->nfslo_first) 2429 new_lop->nfslo_first = lop->nfslo_first; 2430 if (lop->nfslo_end > new_lop->nfslo_end) 2431 new_lop->nfslo_end = lop->nfslo_end; 2432 tlop = lop; 2433 lop = LIST_NEXT(lop, nfslo_list); 2434 nfscl_freelock(tlop, local); 2435 continue; 2436 } 2437 2438 /* 2439 * All these cases are for contiguous locks that are not the 2440 * same type, so they can't be merged. 2441 */ 2442 if (new_lop->nfslo_first <= lop->nfslo_first) { 2443 /* 2444 * This case is where the new lock overlaps with the 2445 * first part of the old lock. Move the start of the 2446 * old lock to just past the end of the new lock. The 2447 * new lock will be inserted in front of the old, since 2448 * ilop hasn't been updated. (We are done now.) 2449 */ 2450 if (lop->nfslo_first != new_lop->nfslo_end) { 2451 lop->nfslo_first = new_lop->nfslo_end; 2452 modified = 1; 2453 } 2454 break; 2455 } 2456 if (new_lop->nfslo_end >= lop->nfslo_end) { 2457 /* 2458 * This case is where the new lock overlaps with the 2459 * end of the old lock's range. Move the old lock's 2460 * end to just before the new lock's first and insert 2461 * the new lock after the old lock. 2462 * Might not be done yet, since the new lock could 2463 * overlap further locks with higher ranges. 2464 */ 2465 if (lop->nfslo_end != new_lop->nfslo_first) { 2466 lop->nfslo_end = new_lop->nfslo_first; 2467 modified = 1; 2468 } 2469 ilop = lop; 2470 lop = LIST_NEXT(lop, nfslo_list); 2471 continue; 2472 } 2473 /* 2474 * The final case is where the new lock's range is in the 2475 * middle of the current lock's and splits the current lock 2476 * up. Use *other_lopp to handle the second part of the 2477 * split old lock range. (We are done now.) 2478 * For unlock, we use new_lop as other_lop and tmp, since 2479 * other_lop and new_lop are the same for this case. 2480 * We noted the unlock case above, so we don't need 2481 * new_lop->nfslo_type any longer. 2482 */ 2483 tmp = new_lop->nfslo_first; 2484 if (unlock) { 2485 other_lop = new_lop; 2486 *new_lopp = NULL; 2487 } else { 2488 other_lop = *other_lopp; 2489 *other_lopp = NULL; 2490 } 2491 other_lop->nfslo_first = new_lop->nfslo_end; 2492 other_lop->nfslo_end = lop->nfslo_end; 2493 other_lop->nfslo_type = lop->nfslo_type; 2494 lop->nfslo_end = tmp; 2495 nfscl_insertlock(lp, other_lop, lop, local); 2496 ilop = lop; 2497 modified = 1; 2498 break; 2499 } 2500 ilop = lop; 2501 lop = LIST_NEXT(lop, nfslo_list); 2502 if (lop == NULL) 2503 break; 2504 } 2505 2506 /* 2507 * Insert the new lock in the list at the appropriate place. 2508 */ 2509 if (!unlock) { 2510 nfscl_insertlock(lp, new_lop, ilop, local); 2511 *new_lopp = NULL; 2512 modified = 1; 2513 } 2514 return (modified); 2515 } 2516 2517 /* 2518 * This function must be run as a kernel thread. 2519 * It does Renew Ops and recovery, when required. 2520 */ 2521 APPLESTATIC void 2522 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2523 { 2524 struct nfsclowner *owp, *nowp; 2525 struct nfsclopen *op; 2526 struct nfscllockowner *lp, *nlp; 2527 struct nfscldeleghead dh; 2528 struct nfscldeleg *dp, *ndp; 2529 struct ucred *cred; 2530 u_int32_t clidrev; 2531 int error, cbpathdown, islept, igotlock, ret, clearok; 2532 uint32_t recover_done_time = 0; 2533 time_t mytime; 2534 static time_t prevsec = 0; 2535 struct nfscllockownerfh *lfhp, *nlfhp; 2536 struct nfscllockownerfhhead lfh; 2537 struct nfscllayout *lyp, *nlyp; 2538 struct nfscldevinfo *dip, *ndip; 2539 struct nfscllayouthead rlh; 2540 struct nfsclrecalllayout *recallp; 2541 struct nfsclds *dsp; 2542 2543 cred = newnfs_getcred(); 2544 NFSLOCKCLSTATE(); 2545 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2546 NFSUNLOCKCLSTATE(); 2547 for(;;) { 2548 newnfs_setroot(cred); 2549 cbpathdown = 0; 2550 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2551 /* 2552 * Only allow one recover within 1/2 of the lease 2553 * duration (nfsc_renew). 2554 */ 2555 if (recover_done_time < NFSD_MONOSEC) { 2556 recover_done_time = NFSD_MONOSEC + 2557 clp->nfsc_renew; 2558 NFSCL_DEBUG(1, "Doing recovery..\n"); 2559 nfscl_recover(clp, cred, p); 2560 } else { 2561 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n", 2562 recover_done_time, (intmax_t)NFSD_MONOSEC); 2563 NFSLOCKCLSTATE(); 2564 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2565 NFSUNLOCKCLSTATE(); 2566 } 2567 } 2568 if (clp->nfsc_expire <= NFSD_MONOSEC && 2569 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2570 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2571 clidrev = clp->nfsc_clientidrev; 2572 error = nfsrpc_renew(clp, NULL, cred, p); 2573 if (error == NFSERR_CBPATHDOWN) 2574 cbpathdown = 1; 2575 else if (error == NFSERR_STALECLIENTID || 2576 error == NFSERR_BADSESSION) { 2577 NFSLOCKCLSTATE(); 2578 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2579 NFSUNLOCKCLSTATE(); 2580 } else if (error == NFSERR_EXPIRED) 2581 (void) nfscl_hasexpired(clp, clidrev, p); 2582 } 2583 2584 checkdsrenew: 2585 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2586 /* Do renews for any DS sessions. */ 2587 NFSLOCKMNT(clp->nfsc_nmp); 2588 /* Skip first entry, since the MDS is handled above. */ 2589 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2590 if (dsp != NULL) 2591 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2592 while (dsp != NULL) { 2593 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2594 dsp->nfsclds_sess.nfsess_defunct == 0) { 2595 dsp->nfsclds_expire = NFSD_MONOSEC + 2596 clp->nfsc_renew; 2597 NFSUNLOCKMNT(clp->nfsc_nmp); 2598 (void)nfsrpc_renew(clp, dsp, cred, p); 2599 goto checkdsrenew; 2600 } 2601 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2602 } 2603 NFSUNLOCKMNT(clp->nfsc_nmp); 2604 } 2605 2606 TAILQ_INIT(&dh); 2607 NFSLOCKCLSTATE(); 2608 if (cbpathdown) 2609 /* It's a Total Recall! */ 2610 nfscl_totalrecall(clp); 2611 2612 /* 2613 * Now, handle defunct owners. 2614 */ 2615 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2616 if (LIST_EMPTY(&owp->nfsow_open)) { 2617 if (owp->nfsow_defunct != 0) 2618 nfscl_freeopenowner(owp, 0); 2619 } 2620 } 2621 2622 /* 2623 * Do the recall on any delegations. To avoid trouble, always 2624 * come back up here after having slept. 2625 */ 2626 igotlock = 0; 2627 tryagain: 2628 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2629 while (dp != NULL) { 2630 ndp = TAILQ_NEXT(dp, nfsdl_list); 2631 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2632 /* 2633 * Wait for outstanding I/O ops to be done. 2634 */ 2635 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2636 if (igotlock) { 2637 nfsv4_unlock(&clp->nfsc_lock, 0); 2638 igotlock = 0; 2639 } 2640 dp->nfsdl_rwlock.nfslock_lock |= 2641 NFSV4LOCK_WANTED; 2642 (void) nfsmsleep(&dp->nfsdl_rwlock, 2643 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2644 NULL); 2645 goto tryagain; 2646 } 2647 while (!igotlock) { 2648 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2649 &islept, NFSCLSTATEMUTEXPTR, NULL); 2650 if (islept) 2651 goto tryagain; 2652 } 2653 NFSUNLOCKCLSTATE(); 2654 newnfs_copycred(&dp->nfsdl_cred, cred); 2655 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2656 NULL, cred, p, 1); 2657 if (!ret) { 2658 nfscl_cleandeleg(dp); 2659 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2660 nfsdl_list); 2661 LIST_REMOVE(dp, nfsdl_hash); 2662 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2663 nfscl_delegcnt--; 2664 nfsstatsv1.cldelegates--; 2665 } 2666 NFSLOCKCLSTATE(); 2667 } 2668 dp = ndp; 2669 } 2670 2671 /* 2672 * Clear out old delegations, if we are above the high water 2673 * mark. Only clear out ones with no state related to them. 2674 * The tailq list is in LRU order. 2675 */ 2676 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2677 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2678 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2679 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2680 dp->nfsdl_rwlock.nfslock_lock == 0 && 2681 dp->nfsdl_timestamp < NFSD_MONOSEC && 2682 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2683 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2684 clearok = 1; 2685 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2686 op = LIST_FIRST(&owp->nfsow_open); 2687 if (op != NULL) { 2688 clearok = 0; 2689 break; 2690 } 2691 } 2692 if (clearok) { 2693 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2694 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2695 clearok = 0; 2696 break; 2697 } 2698 } 2699 } 2700 if (clearok) { 2701 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2702 LIST_REMOVE(dp, nfsdl_hash); 2703 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2704 nfscl_delegcnt--; 2705 nfsstatsv1.cldelegates--; 2706 } 2707 } 2708 dp = ndp; 2709 } 2710 if (igotlock) 2711 nfsv4_unlock(&clp->nfsc_lock, 0); 2712 2713 /* 2714 * Do the recall on any layouts. To avoid trouble, always 2715 * come back up here after having slept. 2716 */ 2717 TAILQ_INIT(&rlh); 2718 tryagain2: 2719 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2720 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2721 /* 2722 * Wait for outstanding I/O ops to be done. 2723 */ 2724 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2725 (lyp->nfsly_lock.nfslock_lock & 2726 NFSV4LOCK_LOCK) != 0) { 2727 lyp->nfsly_lock.nfslock_lock |= 2728 NFSV4LOCK_WANTED; 2729 nfsmsleep(&lyp->nfsly_lock.nfslock_lock, 2730 NFSCLSTATEMUTEXPTR, PZERO, "nfslyp", 2731 NULL); 2732 goto tryagain2; 2733 } 2734 /* Move the layout to the recall list. */ 2735 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2736 nfsly_list); 2737 LIST_REMOVE(lyp, nfsly_hash); 2738 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2739 2740 /* Handle any layout commits. */ 2741 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2742 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2743 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2744 NFSUNLOCKCLSTATE(); 2745 NFSCL_DEBUG(3, "do layoutcommit\n"); 2746 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2747 cred, p); 2748 NFSLOCKCLSTATE(); 2749 goto tryagain2; 2750 } 2751 } 2752 } 2753 2754 /* Now, look for stale layouts. */ 2755 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2756 while (lyp != NULL) { 2757 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2758 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2759 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2760 lyp->nfsly_lock.nfslock_usecnt == 0 && 2761 lyp->nfsly_lock.nfslock_lock == 0) { 2762 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2763 nfscl_layoutcnt); 2764 recallp = malloc(sizeof(*recallp), 2765 M_NFSLAYRECALL, M_NOWAIT); 2766 if (recallp == NULL) 2767 break; 2768 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2769 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2770 lyp->nfsly_stateid.seqid, 0, 0, NULL, 2771 recallp); 2772 } 2773 lyp = nlyp; 2774 } 2775 2776 /* 2777 * Free up any unreferenced device info structures. 2778 */ 2779 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 2780 if (dip->nfsdi_layoutrefs == 0 && 2781 dip->nfsdi_refcnt == 0) { 2782 NFSCL_DEBUG(4, "freeing devinfo\n"); 2783 LIST_REMOVE(dip, nfsdi_list); 2784 nfscl_freedevinfo(dip); 2785 } 2786 } 2787 NFSUNLOCKCLSTATE(); 2788 2789 /* Do layout return(s), as required. */ 2790 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 2791 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 2792 NFSCL_DEBUG(4, "ret layout\n"); 2793 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 2794 nfscl_freelayout(lyp); 2795 } 2796 2797 /* 2798 * Delegreturn any delegations cleaned out or recalled. 2799 */ 2800 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2801 newnfs_copycred(&dp->nfsdl_cred, cred); 2802 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2803 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2804 free(dp, M_NFSCLDELEG); 2805 } 2806 2807 SLIST_INIT(&lfh); 2808 /* 2809 * Call nfscl_cleanupkext() once per second to check for 2810 * open/lock owners where the process has exited. 2811 */ 2812 mytime = NFSD_MONOSEC; 2813 if (prevsec != mytime) { 2814 prevsec = mytime; 2815 nfscl_cleanupkext(clp, &lfh); 2816 } 2817 2818 /* 2819 * Do a ReleaseLockOwner for all lock owners where the 2820 * associated process no longer exists, as found by 2821 * nfscl_cleanupkext(). 2822 */ 2823 newnfs_setroot(cred); 2824 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2825 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2826 nlp) { 2827 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2828 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2829 p); 2830 nfscl_freelockowner(lp, 0); 2831 } 2832 free(lfhp, M_TEMP); 2833 } 2834 SLIST_INIT(&lfh); 2835 2836 NFSLOCKCLSTATE(); 2837 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2838 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2839 hz); 2840 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2841 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2842 NFSUNLOCKCLSTATE(); 2843 NFSFREECRED(cred); 2844 wakeup((caddr_t)clp); 2845 return; 2846 } 2847 NFSUNLOCKCLSTATE(); 2848 } 2849 } 2850 2851 /* 2852 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 2853 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 2854 */ 2855 APPLESTATIC void 2856 nfscl_initiate_recovery(struct nfsclclient *clp) 2857 { 2858 2859 if (clp == NULL) 2860 return; 2861 NFSLOCKCLSTATE(); 2862 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2863 NFSUNLOCKCLSTATE(); 2864 wakeup((caddr_t)clp); 2865 } 2866 2867 /* 2868 * Dump out the state stuff for debugging. 2869 */ 2870 APPLESTATIC void 2871 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2872 int lockowner, int locks) 2873 { 2874 struct nfsclclient *clp; 2875 struct nfsclowner *owp; 2876 struct nfsclopen *op; 2877 struct nfscllockowner *lp; 2878 struct nfscllock *lop; 2879 struct nfscldeleg *dp; 2880 2881 clp = nmp->nm_clp; 2882 if (clp == NULL) { 2883 printf("nfscl dumpstate NULL clp\n"); 2884 return; 2885 } 2886 NFSLOCKCLSTATE(); 2887 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2888 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2889 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2890 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2891 owp->nfsow_owner[0], owp->nfsow_owner[1], 2892 owp->nfsow_owner[2], owp->nfsow_owner[3], 2893 owp->nfsow_seqid); 2894 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2895 if (opens) 2896 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2897 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2898 op->nfso_stateid.other[2], op->nfso_opencnt, 2899 op->nfso_fh[12]); 2900 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2901 if (lockowner) 2902 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2903 lp->nfsl_owner[0], lp->nfsl_owner[1], 2904 lp->nfsl_owner[2], lp->nfsl_owner[3], 2905 lp->nfsl_seqid, 2906 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2907 lp->nfsl_stateid.other[2]); 2908 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2909 if (locks) 2910 #ifdef __FreeBSD__ 2911 printf("lck typ=%d fst=%ju end=%ju\n", 2912 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2913 (intmax_t)lop->nfslo_end); 2914 #else 2915 printf("lck typ=%d fst=%qd end=%qd\n", 2916 lop->nfslo_type, lop->nfslo_first, 2917 lop->nfslo_end); 2918 #endif 2919 } 2920 } 2921 } 2922 } 2923 } 2924 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2925 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2926 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2927 owp->nfsow_owner[0], owp->nfsow_owner[1], 2928 owp->nfsow_owner[2], owp->nfsow_owner[3], 2929 owp->nfsow_seqid); 2930 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2931 if (opens) 2932 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2933 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2934 op->nfso_stateid.other[2], op->nfso_opencnt, 2935 op->nfso_fh[12]); 2936 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2937 if (lockowner) 2938 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2939 lp->nfsl_owner[0], lp->nfsl_owner[1], 2940 lp->nfsl_owner[2], lp->nfsl_owner[3], 2941 lp->nfsl_seqid, 2942 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2943 lp->nfsl_stateid.other[2]); 2944 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2945 if (locks) 2946 #ifdef __FreeBSD__ 2947 printf("lck typ=%d fst=%ju end=%ju\n", 2948 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2949 (intmax_t)lop->nfslo_end); 2950 #else 2951 printf("lck typ=%d fst=%qd end=%qd\n", 2952 lop->nfslo_type, lop->nfslo_first, 2953 lop->nfslo_end); 2954 #endif 2955 } 2956 } 2957 } 2958 } 2959 NFSUNLOCKCLSTATE(); 2960 } 2961 2962 /* 2963 * Check for duplicate open owners and opens. 2964 * (Only used as a diagnostic aid.) 2965 */ 2966 APPLESTATIC void 2967 nfscl_dupopen(vnode_t vp, int dupopens) 2968 { 2969 struct nfsclclient *clp; 2970 struct nfsclowner *owp, *owp2; 2971 struct nfsclopen *op, *op2; 2972 struct nfsfh *nfhp; 2973 2974 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2975 if (clp == NULL) { 2976 printf("nfscl dupopen NULL clp\n"); 2977 return; 2978 } 2979 nfhp = VTONFS(vp)->n_fhp; 2980 NFSLOCKCLSTATE(); 2981 2982 /* 2983 * First, search for duplicate owners. 2984 * These should never happen! 2985 */ 2986 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2987 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2988 if (owp != owp2 && 2989 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2990 NFSV4CL_LOCKNAMELEN)) { 2991 NFSUNLOCKCLSTATE(); 2992 printf("DUP OWNER\n"); 2993 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2994 return; 2995 } 2996 } 2997 } 2998 2999 /* 3000 * Now, search for duplicate stateids. 3001 * These shouldn't happen, either. 3002 */ 3003 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3004 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3005 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3006 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3007 if (op != op2 && 3008 (op->nfso_stateid.other[0] != 0 || 3009 op->nfso_stateid.other[1] != 0 || 3010 op->nfso_stateid.other[2] != 0) && 3011 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 3012 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 3013 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 3014 NFSUNLOCKCLSTATE(); 3015 printf("DUP STATEID\n"); 3016 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 3017 0); 3018 return; 3019 } 3020 } 3021 } 3022 } 3023 } 3024 3025 /* 3026 * Now search for duplicate opens. 3027 * Duplicate opens for the same owner 3028 * should never occur. Other duplicates are 3029 * possible and are checked for if "dupopens" 3030 * is true. 3031 */ 3032 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3033 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3034 if (nfhp->nfh_len == op2->nfso_fhlen && 3035 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 3036 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3037 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3038 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 3039 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 3040 (!NFSBCMP(op->nfso_own->nfsow_owner, 3041 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 3042 dupopens)) { 3043 if (!NFSBCMP(op->nfso_own->nfsow_owner, 3044 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3045 NFSUNLOCKCLSTATE(); 3046 printf("BADDUP OPEN\n"); 3047 } else { 3048 NFSUNLOCKCLSTATE(); 3049 printf("DUP OPEN\n"); 3050 } 3051 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 3052 0, 0); 3053 return; 3054 } 3055 } 3056 } 3057 } 3058 } 3059 } 3060 NFSUNLOCKCLSTATE(); 3061 } 3062 3063 /* 3064 * During close, find an open that needs to be dereferenced and 3065 * dereference it. If there are no more opens for this file, 3066 * log a message to that effect. 3067 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 3068 * on the file's vnode. 3069 * This is the safe way, since it is difficult to identify 3070 * which open the close is for and I/O can be performed after the 3071 * close(2) system call when a file is mmap'd. 3072 * If it returns 0 for success, there will be a referenced 3073 * clp returned via clpp. 3074 */ 3075 APPLESTATIC int 3076 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 3077 { 3078 struct nfsclclient *clp; 3079 struct nfsclowner *owp; 3080 struct nfsclopen *op; 3081 struct nfscldeleg *dp; 3082 struct nfsfh *nfhp; 3083 int error, notdecr; 3084 3085 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3086 if (error) 3087 return (error); 3088 *clpp = clp; 3089 3090 nfhp = VTONFS(vp)->n_fhp; 3091 notdecr = 1; 3092 NFSLOCKCLSTATE(); 3093 /* 3094 * First, look for one under a delegation that was locally issued 3095 * and just decrement the opencnt for it. Since all my Opens against 3096 * the server are DENY_NONE, I don't see a problem with hanging 3097 * onto them. (It is much easier to use one of the extant Opens 3098 * that I already have on the server when a Delegation is recalled 3099 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3100 */ 3101 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3102 if (dp != NULL) { 3103 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3104 op = LIST_FIRST(&owp->nfsow_open); 3105 if (op != NULL) { 3106 /* 3107 * Since a delegation is for a file, there 3108 * should never be more than one open for 3109 * each openowner. 3110 */ 3111 if (LIST_NEXT(op, nfso_list) != NULL) 3112 panic("nfscdeleg opens"); 3113 if (notdecr && op->nfso_opencnt > 0) { 3114 notdecr = 0; 3115 op->nfso_opencnt--; 3116 break; 3117 } 3118 } 3119 } 3120 } 3121 3122 /* Now process the opens against the server. */ 3123 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3124 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3125 if (op->nfso_fhlen == nfhp->nfh_len && 3126 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3127 nfhp->nfh_len)) { 3128 /* Found an open, decrement cnt if possible */ 3129 if (notdecr && op->nfso_opencnt > 0) { 3130 notdecr = 0; 3131 op->nfso_opencnt--; 3132 } 3133 /* 3134 * There are more opens, so just return. 3135 */ 3136 if (op->nfso_opencnt > 0) { 3137 NFSUNLOCKCLSTATE(); 3138 return (0); 3139 } 3140 } 3141 } 3142 } 3143 NFSUNLOCKCLSTATE(); 3144 if (notdecr) 3145 printf("nfscl: never fnd open\n"); 3146 return (0); 3147 } 3148 3149 APPLESTATIC int 3150 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3151 { 3152 struct nfsclclient *clp; 3153 struct nfsclowner *owp, *nowp; 3154 struct nfsclopen *op; 3155 struct nfscldeleg *dp; 3156 struct nfsfh *nfhp; 3157 struct nfsclrecalllayout *recallp; 3158 int error; 3159 3160 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3161 if (error) 3162 return (error); 3163 *clpp = clp; 3164 3165 nfhp = VTONFS(vp)->n_fhp; 3166 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 3167 NFSLOCKCLSTATE(); 3168 /* 3169 * First get rid of the local Open structures, which should be no 3170 * longer in use. 3171 */ 3172 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3173 if (dp != NULL) { 3174 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3175 op = LIST_FIRST(&owp->nfsow_open); 3176 if (op != NULL) { 3177 KASSERT((op->nfso_opencnt == 0), 3178 ("nfscl: bad open cnt on deleg")); 3179 nfscl_freeopen(op, 1); 3180 } 3181 nfscl_freeopenowner(owp, 1); 3182 } 3183 } 3184 3185 /* Return any layouts marked return on close. */ 3186 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp); 3187 3188 /* Now process the opens against the server. */ 3189 lookformore: 3190 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3191 op = LIST_FIRST(&owp->nfsow_open); 3192 while (op != NULL) { 3193 if (op->nfso_fhlen == nfhp->nfh_len && 3194 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3195 nfhp->nfh_len)) { 3196 /* Found an open, close it. */ 3197 #ifdef DIAGNOSTIC 3198 KASSERT((op->nfso_opencnt == 0), 3199 ("nfscl: bad open cnt on server (%d)", 3200 op->nfso_opencnt)); 3201 #endif 3202 NFSUNLOCKCLSTATE(); 3203 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 3204 p); 3205 NFSLOCKCLSTATE(); 3206 goto lookformore; 3207 } 3208 op = LIST_NEXT(op, nfso_list); 3209 } 3210 } 3211 NFSUNLOCKCLSTATE(); 3212 /* 3213 * recallp has been set NULL by nfscl_retoncloselayout() if it was 3214 * used by the function, but calling free() with a NULL pointer is ok. 3215 */ 3216 free(recallp, M_NFSLAYRECALL); 3217 return (0); 3218 } 3219 3220 /* 3221 * Return all delegations on this client. 3222 * (Must be called with client sleep lock.) 3223 */ 3224 static void 3225 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3226 { 3227 struct nfscldeleg *dp, *ndp; 3228 struct ucred *cred; 3229 3230 cred = newnfs_getcred(); 3231 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3232 nfscl_cleandeleg(dp); 3233 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3234 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3235 } 3236 NFSFREECRED(cred); 3237 } 3238 3239 /* 3240 * Do a callback RPC. 3241 */ 3242 APPLESTATIC void 3243 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3244 { 3245 int clist, gotseq_ok, i, j, k, op, rcalls; 3246 u_int32_t *tl; 3247 struct nfsclclient *clp; 3248 struct nfscldeleg *dp = NULL; 3249 int numops, taglen = -1, error = 0, trunc __unused; 3250 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3251 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3252 vnode_t vp = NULL; 3253 struct nfsnode *np; 3254 struct vattr va; 3255 struct nfsfh *nfhp; 3256 mount_t mp; 3257 nfsattrbit_t attrbits, rattrbits; 3258 nfsv4stateid_t stateid; 3259 uint32_t seqid, slotid = 0, highslot, cachethis __unused; 3260 uint8_t sessionid[NFSX_V4SESSIONID]; 3261 struct mbuf *rep; 3262 struct nfscllayout *lyp; 3263 uint64_t filesid[2], len, off; 3264 int changed, gotone, laytype, recalltype; 3265 uint32_t iomode; 3266 struct nfsclrecalllayout *recallp = NULL; 3267 struct nfsclsession *tsep; 3268 3269 gotseq_ok = 0; 3270 nfsrvd_rephead(nd); 3271 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3272 taglen = fxdr_unsigned(int, *tl); 3273 if (taglen < 0) { 3274 error = EBADRPC; 3275 goto nfsmout; 3276 } 3277 if (taglen <= NFSV4_SMALLSTR) 3278 tagstr = tag; 3279 else 3280 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3281 error = nfsrv_mtostr(nd, tagstr, taglen); 3282 if (error) { 3283 if (taglen > NFSV4_SMALLSTR) 3284 free(tagstr, M_TEMP); 3285 taglen = -1; 3286 goto nfsmout; 3287 } 3288 (void) nfsm_strtom(nd, tag, taglen); 3289 if (taglen > NFSV4_SMALLSTR) { 3290 free(tagstr, M_TEMP); 3291 } 3292 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3293 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3294 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3295 if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION) 3296 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3297 cbident = fxdr_unsigned(u_int32_t, *tl++); 3298 if (nd->nd_repstat) 3299 numops = 0; 3300 else 3301 numops = fxdr_unsigned(int, *tl); 3302 /* 3303 * Loop around doing the sub ops. 3304 */ 3305 for (i = 0; i < numops; i++) { 3306 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3307 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3308 *repp++ = *tl; 3309 op = fxdr_unsigned(int, *tl); 3310 if (op < NFSV4OP_CBGETATTR || 3311 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3312 (op > NFSV4OP_CBNOTIFYDEVID && 3313 minorvers == NFSV41_MINORVERSION)) { 3314 nd->nd_repstat = NFSERR_OPILLEGAL; 3315 *repp = nfscl_errmap(nd, minorvers); 3316 retops++; 3317 break; 3318 } 3319 nd->nd_procnum = op; 3320 if (op < NFSV41_CBNOPS) 3321 nfsstatsv1.cbrpccnt[nd->nd_procnum]++; 3322 switch (op) { 3323 case NFSV4OP_CBGETATTR: 3324 NFSCL_DEBUG(4, "cbgetattr\n"); 3325 mp = NULL; 3326 vp = NULL; 3327 error = nfsm_getfh(nd, &nfhp); 3328 if (!error) 3329 error = nfsrv_getattrbits(nd, &attrbits, 3330 NULL, NULL); 3331 if (error == 0 && i == 0 && 3332 minorvers != NFSV4_MINORVERSION) 3333 error = NFSERR_OPNOTINSESS; 3334 if (!error) { 3335 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3336 &clp); 3337 if (mp == NULL) 3338 error = NFSERR_SERVERFAULT; 3339 } 3340 if (!error) { 3341 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3342 nfhp->nfh_len, p, &np); 3343 if (!error) 3344 vp = NFSTOV(np); 3345 } 3346 if (!error) { 3347 NFSZERO_ATTRBIT(&rattrbits); 3348 NFSLOCKCLSTATE(); 3349 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3350 nfhp->nfh_len); 3351 if (dp != NULL) { 3352 if (NFSISSET_ATTRBIT(&attrbits, 3353 NFSATTRBIT_SIZE)) { 3354 if (vp != NULL) 3355 va.va_size = np->n_size; 3356 else 3357 va.va_size = 3358 dp->nfsdl_size; 3359 NFSSETBIT_ATTRBIT(&rattrbits, 3360 NFSATTRBIT_SIZE); 3361 } 3362 if (NFSISSET_ATTRBIT(&attrbits, 3363 NFSATTRBIT_CHANGE)) { 3364 va.va_filerev = 3365 dp->nfsdl_change; 3366 if (vp == NULL || 3367 (np->n_flag & NDELEGMOD)) 3368 va.va_filerev++; 3369 NFSSETBIT_ATTRBIT(&rattrbits, 3370 NFSATTRBIT_CHANGE); 3371 } 3372 } else 3373 error = NFSERR_SERVERFAULT; 3374 NFSUNLOCKCLSTATE(); 3375 } 3376 if (vp != NULL) 3377 vrele(vp); 3378 if (mp != NULL) 3379 vfs_unbusy(mp); 3380 if (nfhp != NULL) 3381 free(nfhp, M_NFSFH); 3382 if (!error) 3383 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3384 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3385 (uint64_t)0, NULL); 3386 break; 3387 case NFSV4OP_CBRECALL: 3388 NFSCL_DEBUG(4, "cbrecall\n"); 3389 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3390 NFSX_UNSIGNED); 3391 stateid.seqid = *tl++; 3392 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3393 NFSX_STATEIDOTHER); 3394 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3395 trunc = fxdr_unsigned(int, *tl); 3396 error = nfsm_getfh(nd, &nfhp); 3397 if (error == 0 && i == 0 && 3398 minorvers != NFSV4_MINORVERSION) 3399 error = NFSERR_OPNOTINSESS; 3400 if (!error) { 3401 NFSLOCKCLSTATE(); 3402 if (minorvers == NFSV4_MINORVERSION) 3403 clp = nfscl_getclnt(cbident); 3404 else 3405 clp = nfscl_getclntsess(sessionid); 3406 if (clp != NULL) { 3407 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3408 nfhp->nfh_len); 3409 if (dp != NULL && (dp->nfsdl_flags & 3410 NFSCLDL_DELEGRET) == 0) { 3411 dp->nfsdl_flags |= 3412 NFSCLDL_RECALL; 3413 wakeup((caddr_t)clp); 3414 } 3415 } else { 3416 error = NFSERR_SERVERFAULT; 3417 } 3418 NFSUNLOCKCLSTATE(); 3419 } 3420 if (nfhp != NULL) 3421 free(nfhp, M_NFSFH); 3422 break; 3423 case NFSV4OP_CBLAYOUTRECALL: 3424 NFSCL_DEBUG(4, "cblayrec\n"); 3425 nfhp = NULL; 3426 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3427 laytype = fxdr_unsigned(int, *tl++); 3428 iomode = fxdr_unsigned(uint32_t, *tl++); 3429 if (newnfs_true == *tl++) 3430 changed = 1; 3431 else 3432 changed = 0; 3433 recalltype = fxdr_unsigned(int, *tl); 3434 NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n", 3435 laytype, iomode, changed, recalltype); 3436 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3437 M_WAITOK); 3438 if (laytype != NFSLAYOUT_NFSV4_1_FILES && 3439 laytype != NFSLAYOUT_FLEXFILE) 3440 error = NFSERR_NOMATCHLAYOUT; 3441 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3442 error = nfsm_getfh(nd, &nfhp); 3443 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3444 if (error != 0) 3445 goto nfsmout; 3446 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3447 NFSX_STATEID); 3448 off = fxdr_hyper(tl); tl += 2; 3449 len = fxdr_hyper(tl); tl += 2; 3450 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3451 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3452 if (minorvers == NFSV4_MINORVERSION) 3453 error = NFSERR_NOTSUPP; 3454 else if (i == 0) 3455 error = NFSERR_OPNOTINSESS; 3456 NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n", 3457 (uintmax_t)off, (uintmax_t)len, 3458 stateid.seqid, error); 3459 if (error == 0) { 3460 NFSLOCKCLSTATE(); 3461 clp = nfscl_getclntsess(sessionid); 3462 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3463 if (clp != NULL) { 3464 lyp = nfscl_findlayout(clp, 3465 nfhp->nfh_fh, 3466 nfhp->nfh_len); 3467 NFSCL_DEBUG(4, "cblyp=%p\n", 3468 lyp); 3469 if (lyp != NULL && 3470 (lyp->nfsly_flags & 3471 (NFSLY_FILES | 3472 NFSLY_FLEXFILE)) != 0 && 3473 !NFSBCMP(stateid.other, 3474 lyp->nfsly_stateid.other, 3475 NFSX_STATEIDOTHER)) { 3476 error = 3477 nfscl_layoutrecall( 3478 recalltype, 3479 lyp, iomode, off, 3480 len, stateid.seqid, 3481 0, 0, NULL, 3482 recallp); 3483 recallp = NULL; 3484 wakeup(clp); 3485 NFSCL_DEBUG(4, 3486 "aft layrcal=%d\n", 3487 error); 3488 } else 3489 error = 3490 NFSERR_NOMATCHLAYOUT; 3491 } else 3492 error = NFSERR_NOMATCHLAYOUT; 3493 NFSUNLOCKCLSTATE(); 3494 } 3495 free(nfhp, M_NFSFH); 3496 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3497 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3498 filesid[0] = fxdr_hyper(tl); tl += 2; 3499 filesid[1] = fxdr_hyper(tl); tl += 2; 3500 gotone = 0; 3501 NFSLOCKCLSTATE(); 3502 clp = nfscl_getclntsess(sessionid); 3503 if (clp != NULL) { 3504 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3505 nfsly_list) { 3506 if (lyp->nfsly_filesid[0] == 3507 filesid[0] && 3508 lyp->nfsly_filesid[1] == 3509 filesid[1]) { 3510 error = 3511 nfscl_layoutrecall( 3512 recalltype, 3513 lyp, iomode, 0, 3514 UINT64_MAX, 3515 lyp->nfsly_stateid.seqid, 3516 0, 0, NULL, 3517 recallp); 3518 recallp = NULL; 3519 gotone = 1; 3520 } 3521 } 3522 if (gotone != 0) 3523 wakeup(clp); 3524 else 3525 error = NFSERR_NOMATCHLAYOUT; 3526 } else 3527 error = NFSERR_NOMATCHLAYOUT; 3528 NFSUNLOCKCLSTATE(); 3529 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3530 gotone = 0; 3531 NFSLOCKCLSTATE(); 3532 clp = nfscl_getclntsess(sessionid); 3533 if (clp != NULL) { 3534 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3535 nfsly_list) { 3536 error = nfscl_layoutrecall( 3537 recalltype, lyp, iomode, 0, 3538 UINT64_MAX, 3539 lyp->nfsly_stateid.seqid, 3540 0, 0, NULL, recallp); 3541 recallp = NULL; 3542 gotone = 1; 3543 } 3544 if (gotone != 0) 3545 wakeup(clp); 3546 else 3547 error = NFSERR_NOMATCHLAYOUT; 3548 } else 3549 error = NFSERR_NOMATCHLAYOUT; 3550 NFSUNLOCKCLSTATE(); 3551 } else 3552 error = NFSERR_NOMATCHLAYOUT; 3553 if (recallp != NULL) { 3554 free(recallp, M_NFSLAYRECALL); 3555 recallp = NULL; 3556 } 3557 break; 3558 case NFSV4OP_CBSEQUENCE: 3559 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3560 5 * NFSX_UNSIGNED); 3561 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3562 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3563 seqid = fxdr_unsigned(uint32_t, *tl++); 3564 slotid = fxdr_unsigned(uint32_t, *tl++); 3565 highslot = fxdr_unsigned(uint32_t, *tl++); 3566 cachethis = *tl++; 3567 /* Throw away the referring call stuff. */ 3568 clist = fxdr_unsigned(int, *tl); 3569 for (j = 0; j < clist; j++) { 3570 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3571 NFSX_UNSIGNED); 3572 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3573 rcalls = fxdr_unsigned(int, *tl); 3574 for (k = 0; k < rcalls; k++) { 3575 NFSM_DISSECT(tl, uint32_t *, 3576 2 * NFSX_UNSIGNED); 3577 } 3578 } 3579 NFSLOCKCLSTATE(); 3580 if (i == 0) { 3581 clp = nfscl_getclntsess(sessionid); 3582 if (clp == NULL) 3583 error = NFSERR_SERVERFAULT; 3584 } else 3585 error = NFSERR_SEQUENCEPOS; 3586 if (error == 0) { 3587 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3588 error = nfsv4_seqsession(seqid, slotid, 3589 highslot, tsep->nfsess_cbslots, &rep, 3590 tsep->nfsess_backslots); 3591 } 3592 NFSUNLOCKCLSTATE(); 3593 if (error == 0 || error == NFSERR_REPLYFROMCACHE) { 3594 gotseq_ok = 1; 3595 if (rep != NULL) { 3596 /* 3597 * Handle a reply for a retried 3598 * callback. The reply will be 3599 * re-inserted in the session cache 3600 * by the nfsv4_seqsess_cacherep() call 3601 * after out: 3602 */ 3603 KASSERT(error == NFSERR_REPLYFROMCACHE, 3604 ("cbsequence: non-NULL rep")); 3605 NFSCL_DEBUG(4, "Got cbretry\n"); 3606 m_freem(nd->nd_mreq); 3607 nd->nd_mreq = rep; 3608 rep = NULL; 3609 goto out; 3610 } 3611 NFSM_BUILD(tl, uint32_t *, 3612 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3613 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3614 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3615 *tl++ = txdr_unsigned(seqid); 3616 *tl++ = txdr_unsigned(slotid); 3617 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3618 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3619 } 3620 break; 3621 default: 3622 if (i == 0 && minorvers == NFSV41_MINORVERSION) 3623 error = NFSERR_OPNOTINSESS; 3624 else { 3625 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3626 error = NFSERR_NOTSUPP; 3627 } 3628 break; 3629 } 3630 if (error) { 3631 if (error == EBADRPC || error == NFSERR_BADXDR) { 3632 nd->nd_repstat = NFSERR_BADXDR; 3633 } else { 3634 nd->nd_repstat = error; 3635 } 3636 error = 0; 3637 } 3638 retops++; 3639 if (nd->nd_repstat) { 3640 *repp = nfscl_errmap(nd, minorvers); 3641 break; 3642 } else 3643 *repp = 0; /* NFS4_OK */ 3644 } 3645 nfsmout: 3646 if (recallp != NULL) 3647 free(recallp, M_NFSLAYRECALL); 3648 if (error) { 3649 if (error == EBADRPC || error == NFSERR_BADXDR) 3650 nd->nd_repstat = NFSERR_BADXDR; 3651 else 3652 printf("nfsv4 comperr1=%d\n", error); 3653 } 3654 if (taglen == -1) { 3655 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3656 *tl++ = 0; 3657 *tl = 0; 3658 } else { 3659 *retopsp = txdr_unsigned(retops); 3660 } 3661 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3662 out: 3663 if (gotseq_ok != 0) { 3664 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3665 NFSLOCKCLSTATE(); 3666 clp = nfscl_getclntsess(sessionid); 3667 if (clp != NULL) { 3668 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3669 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3670 NFSERR_OK, &rep); 3671 NFSUNLOCKCLSTATE(); 3672 } else { 3673 NFSUNLOCKCLSTATE(); 3674 m_freem(rep); 3675 } 3676 } 3677 } 3678 3679 /* 3680 * Generate the next cbident value. Basically just increment a static value 3681 * and then check that it isn't already in the list, if it has wrapped around. 3682 */ 3683 static u_int32_t 3684 nfscl_nextcbident(void) 3685 { 3686 struct nfsclclient *clp; 3687 int matched; 3688 static u_int32_t nextcbident = 0; 3689 static int haswrapped = 0; 3690 3691 nextcbident++; 3692 if (nextcbident == 0) 3693 haswrapped = 1; 3694 if (haswrapped) { 3695 /* 3696 * Search the clientid list for one already using this cbident. 3697 */ 3698 do { 3699 matched = 0; 3700 NFSLOCKCLSTATE(); 3701 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3702 if (clp->nfsc_cbident == nextcbident) { 3703 matched = 1; 3704 break; 3705 } 3706 } 3707 NFSUNLOCKCLSTATE(); 3708 if (matched == 1) 3709 nextcbident++; 3710 } while (matched); 3711 } 3712 return (nextcbident); 3713 } 3714 3715 /* 3716 * Get the mount point related to a given cbident or session and busy it. 3717 */ 3718 static mount_t 3719 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3720 struct nfsclclient **clpp) 3721 { 3722 struct nfsclclient *clp; 3723 mount_t mp; 3724 int error; 3725 struct nfsclsession *tsep; 3726 3727 *clpp = NULL; 3728 NFSLOCKCLSTATE(); 3729 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3730 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3731 if (minorvers == NFSV4_MINORVERSION) { 3732 if (clp->nfsc_cbident == cbident) 3733 break; 3734 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3735 NFSX_V4SESSIONID)) 3736 break; 3737 } 3738 if (clp == NULL) { 3739 NFSUNLOCKCLSTATE(); 3740 return (NULL); 3741 } 3742 mp = clp->nfsc_nmp->nm_mountp; 3743 vfs_ref(mp); 3744 NFSUNLOCKCLSTATE(); 3745 error = vfs_busy(mp, 0); 3746 vfs_rel(mp); 3747 if (error != 0) 3748 return (NULL); 3749 *clpp = clp; 3750 return (mp); 3751 } 3752 3753 /* 3754 * Get the clientid pointer related to a given cbident. 3755 */ 3756 static struct nfsclclient * 3757 nfscl_getclnt(u_int32_t cbident) 3758 { 3759 struct nfsclclient *clp; 3760 3761 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3762 if (clp->nfsc_cbident == cbident) 3763 break; 3764 return (clp); 3765 } 3766 3767 /* 3768 * Get the clientid pointer related to a given sessionid. 3769 */ 3770 static struct nfsclclient * 3771 nfscl_getclntsess(uint8_t *sessionid) 3772 { 3773 struct nfsclclient *clp; 3774 struct nfsclsession *tsep; 3775 3776 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3777 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3778 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3779 NFSX_V4SESSIONID)) 3780 break; 3781 } 3782 return (clp); 3783 } 3784 3785 /* 3786 * Search for a lock conflict locally on the client. A conflict occurs if 3787 * - not same owner and overlapping byte range and at least one of them is 3788 * a write lock or this is an unlock. 3789 */ 3790 static int 3791 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3792 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3793 struct nfscllock **lopp) 3794 { 3795 struct nfsclowner *owp; 3796 struct nfsclopen *op; 3797 int ret; 3798 3799 if (dp != NULL) { 3800 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3801 if (ret) 3802 return (ret); 3803 } 3804 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3805 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3806 if (op->nfso_fhlen == fhlen && 3807 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3808 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3809 own, lopp); 3810 if (ret) 3811 return (ret); 3812 } 3813 } 3814 } 3815 return (0); 3816 } 3817 3818 static int 3819 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3820 u_int8_t *own, struct nfscllock **lopp) 3821 { 3822 struct nfscllockowner *lp; 3823 struct nfscllock *lop; 3824 3825 LIST_FOREACH(lp, lhp, nfsl_list) { 3826 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3827 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3828 if (lop->nfslo_first >= nlop->nfslo_end) 3829 break; 3830 if (lop->nfslo_end <= nlop->nfslo_first) 3831 continue; 3832 if (lop->nfslo_type == F_WRLCK || 3833 nlop->nfslo_type == F_WRLCK || 3834 nlop->nfslo_type == F_UNLCK) { 3835 if (lopp != NULL) 3836 *lopp = lop; 3837 return (NFSERR_DENIED); 3838 } 3839 } 3840 } 3841 } 3842 return (0); 3843 } 3844 3845 /* 3846 * Check for a local conflicting lock. 3847 */ 3848 APPLESTATIC int 3849 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3850 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3851 { 3852 struct nfscllock *lop, nlck; 3853 struct nfscldeleg *dp; 3854 struct nfsnode *np; 3855 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3856 int error; 3857 3858 nlck.nfslo_type = fl->l_type; 3859 nlck.nfslo_first = off; 3860 if (len == NFS64BITSSET) { 3861 nlck.nfslo_end = NFS64BITSSET; 3862 } else { 3863 nlck.nfslo_end = off + len; 3864 if (nlck.nfslo_end <= nlck.nfslo_first) 3865 return (NFSERR_INVAL); 3866 } 3867 np = VTONFS(vp); 3868 nfscl_filllockowner(id, own, flags); 3869 NFSLOCKCLSTATE(); 3870 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3871 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3872 &nlck, own, dp, &lop); 3873 if (error != 0) { 3874 fl->l_whence = SEEK_SET; 3875 fl->l_start = lop->nfslo_first; 3876 if (lop->nfslo_end == NFS64BITSSET) 3877 fl->l_len = 0; 3878 else 3879 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3880 fl->l_pid = (pid_t)0; 3881 fl->l_type = lop->nfslo_type; 3882 error = -1; /* no RPC required */ 3883 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3884 fl->l_type == F_RDLCK)) { 3885 /* 3886 * The delegation ensures that there isn't a conflicting 3887 * lock on the server, so return -1 to indicate an RPC 3888 * isn't required. 3889 */ 3890 fl->l_type = F_UNLCK; 3891 error = -1; 3892 } 3893 NFSUNLOCKCLSTATE(); 3894 return (error); 3895 } 3896 3897 /* 3898 * Handle Recall of a delegation. 3899 * The clp must be exclusive locked when this is called. 3900 */ 3901 static int 3902 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3903 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3904 int called_from_renewthread) 3905 { 3906 struct nfsclowner *owp, *lowp, *nowp; 3907 struct nfsclopen *op, *lop; 3908 struct nfscllockowner *lp; 3909 struct nfscllock *lckp; 3910 struct nfsnode *np; 3911 int error = 0, ret, gotvp = 0; 3912 3913 if (vp == NULL) { 3914 /* 3915 * First, get a vnode for the file. This is needed to do RPCs. 3916 */ 3917 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3918 dp->nfsdl_fhlen, p, &np); 3919 if (ret) { 3920 /* 3921 * File isn't open, so nothing to move over to the 3922 * server. 3923 */ 3924 return (0); 3925 } 3926 vp = NFSTOV(np); 3927 gotvp = 1; 3928 } else { 3929 np = VTONFS(vp); 3930 } 3931 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3932 3933 /* 3934 * Ok, if it's a write delegation, flush data to the server, so 3935 * that close/open consistency is retained. 3936 */ 3937 ret = 0; 3938 NFSLOCKNODE(np); 3939 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3940 np->n_flag |= NDELEGRECALL; 3941 NFSUNLOCKNODE(np); 3942 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread); 3943 NFSLOCKNODE(np); 3944 np->n_flag &= ~NDELEGRECALL; 3945 } 3946 NFSINVALATTRCACHE(np); 3947 NFSUNLOCKNODE(np); 3948 if (ret == EIO && called_from_renewthread != 0) { 3949 /* 3950 * If the flush failed with EIO for the renew thread, 3951 * return now, so that the dirty buffer will be flushed 3952 * later. 3953 */ 3954 if (gotvp != 0) 3955 vrele(vp); 3956 return (ret); 3957 } 3958 3959 /* 3960 * Now, for each openowner with opens issued locally, move them 3961 * over to state against the server. 3962 */ 3963 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3964 lop = LIST_FIRST(&lowp->nfsow_open); 3965 if (lop != NULL) { 3966 if (LIST_NEXT(lop, nfso_list) != NULL) 3967 panic("nfsdlg mult opens"); 3968 /* 3969 * Look for the same openowner against the server. 3970 */ 3971 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3972 if (!NFSBCMP(lowp->nfsow_owner, 3973 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3974 newnfs_copycred(&dp->nfsdl_cred, cred); 3975 ret = nfscl_moveopen(vp, clp, nmp, lop, 3976 owp, dp, cred, p); 3977 if (ret == NFSERR_STALECLIENTID || 3978 ret == NFSERR_STALEDONTRECOVER || 3979 ret == NFSERR_BADSESSION) { 3980 if (gotvp) 3981 vrele(vp); 3982 return (ret); 3983 } 3984 if (ret) { 3985 nfscl_freeopen(lop, 1); 3986 if (!error) 3987 error = ret; 3988 } 3989 break; 3990 } 3991 } 3992 3993 /* 3994 * If no openowner found, create one and get an open 3995 * for it. 3996 */ 3997 if (owp == NULL) { 3998 nowp = malloc( 3999 sizeof (struct nfsclowner), M_NFSCLOWNER, 4000 M_WAITOK); 4001 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 4002 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 4003 dp->nfsdl_fhlen, NULL, NULL); 4004 newnfs_copycred(&dp->nfsdl_cred, cred); 4005 ret = nfscl_moveopen(vp, clp, nmp, lop, 4006 owp, dp, cred, p); 4007 if (ret) { 4008 nfscl_freeopenowner(owp, 0); 4009 if (ret == NFSERR_STALECLIENTID || 4010 ret == NFSERR_STALEDONTRECOVER || 4011 ret == NFSERR_BADSESSION) { 4012 if (gotvp) 4013 vrele(vp); 4014 return (ret); 4015 } 4016 if (ret) { 4017 nfscl_freeopen(lop, 1); 4018 if (!error) 4019 error = ret; 4020 } 4021 } 4022 } 4023 } 4024 } 4025 4026 /* 4027 * Now, get byte range locks for any locks done locally. 4028 */ 4029 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4030 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 4031 newnfs_copycred(&dp->nfsdl_cred, cred); 4032 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 4033 if (ret == NFSERR_STALESTATEID || 4034 ret == NFSERR_STALEDONTRECOVER || 4035 ret == NFSERR_STALECLIENTID || 4036 ret == NFSERR_BADSESSION) { 4037 if (gotvp) 4038 vrele(vp); 4039 return (ret); 4040 } 4041 if (ret && !error) 4042 error = ret; 4043 } 4044 } 4045 if (gotvp) 4046 vrele(vp); 4047 return (error); 4048 } 4049 4050 /* 4051 * Move a locally issued open over to an owner on the state list. 4052 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 4053 * returns with it unlocked. 4054 */ 4055 static int 4056 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4057 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 4058 struct ucred *cred, NFSPROC_T *p) 4059 { 4060 struct nfsclopen *op, *nop; 4061 struct nfscldeleg *ndp; 4062 struct nfsnode *np; 4063 int error = 0, newone; 4064 4065 /* 4066 * First, look for an appropriate open, If found, just increment the 4067 * opencnt in it. 4068 */ 4069 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 4070 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 4071 op->nfso_fhlen == lop->nfso_fhlen && 4072 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 4073 op->nfso_opencnt += lop->nfso_opencnt; 4074 nfscl_freeopen(lop, 1); 4075 return (0); 4076 } 4077 } 4078 4079 /* No appropriate open, so we have to do one against the server. */ 4080 np = VTONFS(vp); 4081 nop = malloc(sizeof (struct nfsclopen) + 4082 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 4083 newone = 0; 4084 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 4085 lop->nfso_fh, lop->nfso_fhlen, cred, &newone); 4086 ndp = dp; 4087 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 4088 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 4089 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 4090 if (error) { 4091 if (newone) 4092 nfscl_freeopen(op, 0); 4093 } else { 4094 op->nfso_mode |= lop->nfso_mode; 4095 op->nfso_opencnt += lop->nfso_opencnt; 4096 nfscl_freeopen(lop, 1); 4097 } 4098 if (nop != NULL) 4099 free(nop, M_NFSCLOPEN); 4100 if (ndp != NULL) { 4101 /* 4102 * What should I do with the returned delegation, since the 4103 * delegation is being recalled? For now, just printf and 4104 * through it away. 4105 */ 4106 printf("Moveopen returned deleg\n"); 4107 free(ndp, M_NFSCLDELEG); 4108 } 4109 return (error); 4110 } 4111 4112 /* 4113 * Recall all delegations on this client. 4114 */ 4115 static void 4116 nfscl_totalrecall(struct nfsclclient *clp) 4117 { 4118 struct nfscldeleg *dp; 4119 4120 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4121 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4122 dp->nfsdl_flags |= NFSCLDL_RECALL; 4123 } 4124 } 4125 4126 /* 4127 * Relock byte ranges. Called for delegation recall and state expiry. 4128 */ 4129 static int 4130 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4131 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4132 NFSPROC_T *p) 4133 { 4134 struct nfscllockowner *nlp; 4135 struct nfsfh *nfhp; 4136 u_int64_t off, len; 4137 int error, newone, donelocally; 4138 4139 off = lop->nfslo_first; 4140 len = lop->nfslo_end - lop->nfslo_first; 4141 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4142 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4143 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4144 if (error || donelocally) 4145 return (error); 4146 nfhp = VTONFS(vp)->n_fhp; 4147 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4148 nfhp->nfh_len, nlp, newone, 0, off, 4149 len, lop->nfslo_type, cred, p); 4150 if (error) 4151 nfscl_freelockowner(nlp, 0); 4152 return (error); 4153 } 4154 4155 /* 4156 * Called to re-open a file. Basically get a vnode for the file handle 4157 * and then call nfsrpc_openrpc() to do the rest. 4158 */ 4159 static int 4160 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4161 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4162 struct ucred *cred, NFSPROC_T *p) 4163 { 4164 struct nfsnode *np; 4165 vnode_t vp; 4166 int error; 4167 4168 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4169 if (error) 4170 return (error); 4171 vp = NFSTOV(np); 4172 if (np->n_v4 != NULL) { 4173 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4174 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4175 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4176 cred, p); 4177 } else { 4178 error = EINVAL; 4179 } 4180 vrele(vp); 4181 return (error); 4182 } 4183 4184 /* 4185 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4186 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4187 * fail. 4188 */ 4189 static int 4190 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4191 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4192 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4193 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4194 { 4195 int error; 4196 4197 do { 4198 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4199 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4200 0, 0); 4201 if (error == NFSERR_DELAY) 4202 (void) nfs_catnap(PZERO, error, "nfstryop"); 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_openrpc(nmp, vp, fhp, fhlen, newfhp, 4209 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4210 delegtype, cred, p, 1, 0); 4211 if (error == NFSERR_DELAY) 4212 (void) nfs_catnap(PZERO, error, "nfstryop"); 4213 } while (error == NFSERR_DELAY); 4214 } 4215 return (error); 4216 } 4217 4218 /* 4219 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4220 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4221 * cred don't work. 4222 */ 4223 static int 4224 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4225 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4226 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4227 { 4228 struct nfsrv_descript nfsd, *nd = &nfsd; 4229 int error; 4230 4231 do { 4232 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4233 reclaim, off, len, type, cred, p, 0); 4234 if (!error && nd->nd_repstat == NFSERR_DELAY) 4235 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4236 "nfstrylck"); 4237 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4238 if (!error) 4239 error = nd->nd_repstat; 4240 if (error == EAUTH || error == EACCES) { 4241 /* Try again using root credentials */ 4242 newnfs_setroot(cred); 4243 do { 4244 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4245 newone, reclaim, off, len, type, cred, p, 1); 4246 if (!error && nd->nd_repstat == NFSERR_DELAY) 4247 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4248 "nfstrylck"); 4249 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4250 if (!error) 4251 error = nd->nd_repstat; 4252 } 4253 return (error); 4254 } 4255 4256 /* 4257 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4258 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4259 * credentials fail. 4260 */ 4261 static int 4262 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4263 struct nfsmount *nmp, NFSPROC_T *p) 4264 { 4265 int error; 4266 4267 do { 4268 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4269 if (error == NFSERR_DELAY) 4270 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4271 } while (error == NFSERR_DELAY); 4272 if (error == EAUTH || error == EACCES) { 4273 /* Try again using system credentials */ 4274 newnfs_setroot(cred); 4275 do { 4276 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4277 if (error == NFSERR_DELAY) 4278 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4279 } while (error == NFSERR_DELAY); 4280 } 4281 return (error); 4282 } 4283 4284 /* 4285 * Try a close against the server. Just call nfsrpc_closerpc(), 4286 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4287 * credentials fail. 4288 */ 4289 APPLESTATIC int 4290 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4291 struct nfsmount *nmp, NFSPROC_T *p) 4292 { 4293 struct nfsrv_descript nfsd, *nd = &nfsd; 4294 int error; 4295 4296 do { 4297 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4298 if (error == NFSERR_DELAY) 4299 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4300 } while (error == NFSERR_DELAY); 4301 if (error == EAUTH || error == EACCES) { 4302 /* Try again using system credentials */ 4303 newnfs_setroot(cred); 4304 do { 4305 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4306 if (error == NFSERR_DELAY) 4307 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4308 } while (error == NFSERR_DELAY); 4309 } 4310 return (error); 4311 } 4312 4313 /* 4314 * Decide if a delegation on a file permits close without flushing writes 4315 * to the server. This might be a big performance win in some environments. 4316 * (Not useful until the client does caching on local stable storage.) 4317 */ 4318 APPLESTATIC int 4319 nfscl_mustflush(vnode_t vp) 4320 { 4321 struct nfsclclient *clp; 4322 struct nfscldeleg *dp; 4323 struct nfsnode *np; 4324 struct nfsmount *nmp; 4325 4326 np = VTONFS(vp); 4327 nmp = VFSTONFS(vnode_mount(vp)); 4328 if (!NFSHASNFSV4(nmp)) 4329 return (1); 4330 NFSLOCKCLSTATE(); 4331 clp = nfscl_findcl(nmp); 4332 if (clp == NULL) { 4333 NFSUNLOCKCLSTATE(); 4334 return (1); 4335 } 4336 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4337 if (dp != NULL && (dp->nfsdl_flags & 4338 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4339 NFSCLDL_WRITE && 4340 (dp->nfsdl_sizelimit >= np->n_size || 4341 !NFSHASSTRICT3530(nmp))) { 4342 NFSUNLOCKCLSTATE(); 4343 return (0); 4344 } 4345 NFSUNLOCKCLSTATE(); 4346 return (1); 4347 } 4348 4349 /* 4350 * See if a (write) delegation exists for this file. 4351 */ 4352 APPLESTATIC int 4353 nfscl_nodeleg(vnode_t vp, int writedeleg) 4354 { 4355 struct nfsclclient *clp; 4356 struct nfscldeleg *dp; 4357 struct nfsnode *np; 4358 struct nfsmount *nmp; 4359 4360 np = VTONFS(vp); 4361 nmp = VFSTONFS(vnode_mount(vp)); 4362 if (!NFSHASNFSV4(nmp)) 4363 return (1); 4364 NFSLOCKCLSTATE(); 4365 clp = nfscl_findcl(nmp); 4366 if (clp == NULL) { 4367 NFSUNLOCKCLSTATE(); 4368 return (1); 4369 } 4370 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4371 if (dp != NULL && 4372 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4373 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4374 NFSCLDL_WRITE)) { 4375 NFSUNLOCKCLSTATE(); 4376 return (0); 4377 } 4378 NFSUNLOCKCLSTATE(); 4379 return (1); 4380 } 4381 4382 /* 4383 * Look for an associated delegation that should be DelegReturned. 4384 */ 4385 APPLESTATIC int 4386 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 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(vp)); 4398 np = VTONFS(vp); 4399 NFSLOCKCLSTATE(); 4400 /* 4401 * Loop around waiting for: 4402 * - outstanding I/O operations on delegations to complete 4403 * - for a delegation on vp that has state, lock the client and 4404 * do a recall 4405 * - return delegation with no state 4406 */ 4407 while (1) { 4408 clp = nfscl_findcl(nmp); 4409 if (clp == NULL) { 4410 NFSUNLOCKCLSTATE(); 4411 return (retcnt); 4412 } 4413 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4414 np->n_fhp->nfh_len); 4415 if (dp != NULL) { 4416 /* 4417 * Wait for outstanding I/O ops to be done. 4418 */ 4419 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4420 if (igotlock) { 4421 nfsv4_unlock(&clp->nfsc_lock, 0); 4422 igotlock = 0; 4423 } 4424 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4425 (void) nfsmsleep(&dp->nfsdl_rwlock, 4426 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4427 continue; 4428 } 4429 needsrecall = 0; 4430 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4431 if (!LIST_EMPTY(&owp->nfsow_open)) { 4432 needsrecall = 1; 4433 break; 4434 } 4435 } 4436 if (!needsrecall) { 4437 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4438 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4439 needsrecall = 1; 4440 break; 4441 } 4442 } 4443 } 4444 if (needsrecall && !triedrecall) { 4445 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4446 islept = 0; 4447 while (!igotlock) { 4448 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4449 &islept, NFSCLSTATEMUTEXPTR, NULL); 4450 if (islept) 4451 break; 4452 } 4453 if (islept) 4454 continue; 4455 NFSUNLOCKCLSTATE(); 4456 cred = newnfs_getcred(); 4457 newnfs_copycred(&dp->nfsdl_cred, cred); 4458 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 4459 NFSFREECRED(cred); 4460 triedrecall = 1; 4461 NFSLOCKCLSTATE(); 4462 nfsv4_unlock(&clp->nfsc_lock, 0); 4463 igotlock = 0; 4464 continue; 4465 } 4466 *stp = dp->nfsdl_stateid; 4467 retcnt = 1; 4468 nfscl_cleandeleg(dp); 4469 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4470 } 4471 if (igotlock) 4472 nfsv4_unlock(&clp->nfsc_lock, 0); 4473 NFSUNLOCKCLSTATE(); 4474 return (retcnt); 4475 } 4476 } 4477 4478 /* 4479 * Look for associated delegation(s) that should be DelegReturned. 4480 */ 4481 APPLESTATIC int 4482 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4483 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4484 { 4485 struct nfsclclient *clp; 4486 struct nfscldeleg *dp; 4487 struct nfsclowner *owp; 4488 struct nfscllockowner *lp; 4489 struct nfsmount *nmp; 4490 struct ucred *cred; 4491 struct nfsnode *np; 4492 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4493 4494 nmp = VFSTONFS(vnode_mount(fvp)); 4495 *gotfdp = 0; 4496 *gottdp = 0; 4497 NFSLOCKCLSTATE(); 4498 /* 4499 * Loop around waiting for: 4500 * - outstanding I/O operations on delegations to complete 4501 * - for a delegation on fvp that has state, lock the client and 4502 * do a recall 4503 * - return delegation(s) with no state. 4504 */ 4505 while (1) { 4506 clp = nfscl_findcl(nmp); 4507 if (clp == NULL) { 4508 NFSUNLOCKCLSTATE(); 4509 return (retcnt); 4510 } 4511 np = VTONFS(fvp); 4512 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4513 np->n_fhp->nfh_len); 4514 if (dp != NULL && *gotfdp == 0) { 4515 /* 4516 * Wait for outstanding I/O ops to be done. 4517 */ 4518 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4519 if (igotlock) { 4520 nfsv4_unlock(&clp->nfsc_lock, 0); 4521 igotlock = 0; 4522 } 4523 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4524 (void) nfsmsleep(&dp->nfsdl_rwlock, 4525 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4526 continue; 4527 } 4528 needsrecall = 0; 4529 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4530 if (!LIST_EMPTY(&owp->nfsow_open)) { 4531 needsrecall = 1; 4532 break; 4533 } 4534 } 4535 if (!needsrecall) { 4536 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4537 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4538 needsrecall = 1; 4539 break; 4540 } 4541 } 4542 } 4543 if (needsrecall && !triedrecall) { 4544 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4545 islept = 0; 4546 while (!igotlock) { 4547 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4548 &islept, NFSCLSTATEMUTEXPTR, NULL); 4549 if (islept) 4550 break; 4551 } 4552 if (islept) 4553 continue; 4554 NFSUNLOCKCLSTATE(); 4555 cred = newnfs_getcred(); 4556 newnfs_copycred(&dp->nfsdl_cred, cred); 4557 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4558 NFSFREECRED(cred); 4559 triedrecall = 1; 4560 NFSLOCKCLSTATE(); 4561 nfsv4_unlock(&clp->nfsc_lock, 0); 4562 igotlock = 0; 4563 continue; 4564 } 4565 *fstp = dp->nfsdl_stateid; 4566 retcnt++; 4567 *gotfdp = 1; 4568 nfscl_cleandeleg(dp); 4569 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4570 } 4571 if (igotlock) { 4572 nfsv4_unlock(&clp->nfsc_lock, 0); 4573 igotlock = 0; 4574 } 4575 if (tvp != NULL) { 4576 np = VTONFS(tvp); 4577 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4578 np->n_fhp->nfh_len); 4579 if (dp != NULL && *gottdp == 0) { 4580 /* 4581 * Wait for outstanding I/O ops to be done. 4582 */ 4583 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4584 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4585 (void) nfsmsleep(&dp->nfsdl_rwlock, 4586 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4587 continue; 4588 } 4589 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4590 if (!LIST_EMPTY(&owp->nfsow_open)) { 4591 NFSUNLOCKCLSTATE(); 4592 return (retcnt); 4593 } 4594 } 4595 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4596 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4597 NFSUNLOCKCLSTATE(); 4598 return (retcnt); 4599 } 4600 } 4601 *tstp = dp->nfsdl_stateid; 4602 retcnt++; 4603 *gottdp = 1; 4604 nfscl_cleandeleg(dp); 4605 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4606 } 4607 } 4608 NFSUNLOCKCLSTATE(); 4609 return (retcnt); 4610 } 4611 } 4612 4613 /* 4614 * Get a reference on the clientid associated with the mount point. 4615 * Return 1 if success, 0 otherwise. 4616 */ 4617 APPLESTATIC int 4618 nfscl_getref(struct nfsmount *nmp) 4619 { 4620 struct nfsclclient *clp; 4621 4622 NFSLOCKCLSTATE(); 4623 clp = nfscl_findcl(nmp); 4624 if (clp == NULL) { 4625 NFSUNLOCKCLSTATE(); 4626 return (0); 4627 } 4628 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4629 NFSUNLOCKCLSTATE(); 4630 return (1); 4631 } 4632 4633 /* 4634 * Release a reference on a clientid acquired with the above call. 4635 */ 4636 APPLESTATIC void 4637 nfscl_relref(struct nfsmount *nmp) 4638 { 4639 struct nfsclclient *clp; 4640 4641 NFSLOCKCLSTATE(); 4642 clp = nfscl_findcl(nmp); 4643 if (clp == NULL) { 4644 NFSUNLOCKCLSTATE(); 4645 return; 4646 } 4647 nfsv4_relref(&clp->nfsc_lock); 4648 NFSUNLOCKCLSTATE(); 4649 } 4650 4651 /* 4652 * Save the size attribute in the delegation, since the nfsnode 4653 * is going away. 4654 */ 4655 APPLESTATIC void 4656 nfscl_reclaimnode(vnode_t vp) 4657 { 4658 struct nfsclclient *clp; 4659 struct nfscldeleg *dp; 4660 struct nfsnode *np = VTONFS(vp); 4661 struct nfsmount *nmp; 4662 4663 nmp = VFSTONFS(vnode_mount(vp)); 4664 if (!NFSHASNFSV4(nmp)) 4665 return; 4666 NFSLOCKCLSTATE(); 4667 clp = nfscl_findcl(nmp); 4668 if (clp == NULL) { 4669 NFSUNLOCKCLSTATE(); 4670 return; 4671 } 4672 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4673 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4674 dp->nfsdl_size = np->n_size; 4675 NFSUNLOCKCLSTATE(); 4676 } 4677 4678 /* 4679 * Get the saved size attribute in the delegation, since it is a 4680 * newly allocated nfsnode. 4681 */ 4682 APPLESTATIC void 4683 nfscl_newnode(vnode_t vp) 4684 { 4685 struct nfsclclient *clp; 4686 struct nfscldeleg *dp; 4687 struct nfsnode *np = VTONFS(vp); 4688 struct nfsmount *nmp; 4689 4690 nmp = VFSTONFS(vnode_mount(vp)); 4691 if (!NFSHASNFSV4(nmp)) 4692 return; 4693 NFSLOCKCLSTATE(); 4694 clp = nfscl_findcl(nmp); 4695 if (clp == NULL) { 4696 NFSUNLOCKCLSTATE(); 4697 return; 4698 } 4699 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4700 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4701 np->n_size = dp->nfsdl_size; 4702 NFSUNLOCKCLSTATE(); 4703 } 4704 4705 /* 4706 * If there is a valid write delegation for this file, set the modtime 4707 * to the local clock time. 4708 */ 4709 APPLESTATIC void 4710 nfscl_delegmodtime(vnode_t vp) 4711 { 4712 struct nfsclclient *clp; 4713 struct nfscldeleg *dp; 4714 struct nfsnode *np = VTONFS(vp); 4715 struct nfsmount *nmp; 4716 4717 nmp = VFSTONFS(vnode_mount(vp)); 4718 if (!NFSHASNFSV4(nmp)) 4719 return; 4720 NFSLOCKCLSTATE(); 4721 clp = nfscl_findcl(nmp); 4722 if (clp == NULL) { 4723 NFSUNLOCKCLSTATE(); 4724 return; 4725 } 4726 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4727 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4728 nanotime(&dp->nfsdl_modtime); 4729 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4730 } 4731 NFSUNLOCKCLSTATE(); 4732 } 4733 4734 /* 4735 * If there is a valid write delegation for this file with a modtime set, 4736 * put that modtime in mtime. 4737 */ 4738 APPLESTATIC void 4739 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4740 { 4741 struct nfsclclient *clp; 4742 struct nfscldeleg *dp; 4743 struct nfsnode *np = VTONFS(vp); 4744 struct nfsmount *nmp; 4745 4746 nmp = VFSTONFS(vnode_mount(vp)); 4747 if (!NFSHASNFSV4(nmp)) 4748 return; 4749 NFSLOCKCLSTATE(); 4750 clp = nfscl_findcl(nmp); 4751 if (clp == NULL) { 4752 NFSUNLOCKCLSTATE(); 4753 return; 4754 } 4755 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4756 if (dp != NULL && 4757 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4758 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4759 *mtime = dp->nfsdl_modtime; 4760 NFSUNLOCKCLSTATE(); 4761 } 4762 4763 static int 4764 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4765 { 4766 short *defaulterrp, *errp; 4767 4768 if (!nd->nd_repstat) 4769 return (0); 4770 if (nd->nd_procnum == NFSPROC_NOOP) 4771 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4772 if (nd->nd_repstat == EBADRPC) 4773 return (txdr_unsigned(NFSERR_BADXDR)); 4774 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4775 nd->nd_repstat == NFSERR_OPILLEGAL) 4776 return (txdr_unsigned(nd->nd_repstat)); 4777 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4778 minorvers > NFSV4_MINORVERSION) { 4779 /* NFSv4.n error. */ 4780 return (txdr_unsigned(nd->nd_repstat)); 4781 } 4782 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4783 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4784 else 4785 return (txdr_unsigned(nd->nd_repstat)); 4786 while (*++errp) 4787 if (*errp == (short)nd->nd_repstat) 4788 return (txdr_unsigned(nd->nd_repstat)); 4789 return (txdr_unsigned(*defaulterrp)); 4790 } 4791 4792 /* 4793 * Called to find/add a layout to a client. 4794 * This function returns the layout with a refcnt (shared lock) upon 4795 * success (returns 0) or with no lock/refcnt on the layout when an 4796 * error is returned. 4797 * If a layout is passed in via lypp, it is locked (exclusively locked). 4798 */ 4799 APPLESTATIC int 4800 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4801 nfsv4stateid_t *stateidp, int layouttype, int retonclose, 4802 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4803 struct ucred *cred, NFSPROC_T *p) 4804 { 4805 struct nfsclclient *clp; 4806 struct nfscllayout *lyp, *tlyp; 4807 struct nfsclflayout *flp; 4808 struct nfsnode *np = VTONFS(vp); 4809 mount_t mp; 4810 int layout_passed_in; 4811 4812 mp = nmp->nm_mountp; 4813 layout_passed_in = 1; 4814 tlyp = NULL; 4815 lyp = *lypp; 4816 if (lyp == NULL) { 4817 layout_passed_in = 0; 4818 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4819 M_WAITOK | M_ZERO); 4820 } 4821 4822 NFSLOCKCLSTATE(); 4823 clp = nmp->nm_clp; 4824 if (clp == NULL) { 4825 if (layout_passed_in != 0) 4826 nfsv4_unlock(&lyp->nfsly_lock, 0); 4827 NFSUNLOCKCLSTATE(); 4828 if (tlyp != NULL) 4829 free(tlyp, M_NFSLAYOUT); 4830 return (EPERM); 4831 } 4832 if (lyp == NULL) { 4833 /* 4834 * Although no lyp was passed in, another thread might have 4835 * allocated one. If one is found, just increment it's ref 4836 * count and return it. 4837 */ 4838 lyp = nfscl_findlayout(clp, fhp, fhlen); 4839 if (lyp == NULL) { 4840 lyp = tlyp; 4841 tlyp = NULL; 4842 lyp->nfsly_stateid.seqid = stateidp->seqid; 4843 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 4844 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 4845 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 4846 lyp->nfsly_lastbyte = 0; 4847 LIST_INIT(&lyp->nfsly_flayread); 4848 LIST_INIT(&lyp->nfsly_flayrw); 4849 LIST_INIT(&lyp->nfsly_recall); 4850 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 4851 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 4852 lyp->nfsly_clp = clp; 4853 if (layouttype == NFSLAYOUT_FLEXFILE) 4854 lyp->nfsly_flags = NFSLY_FLEXFILE; 4855 else 4856 lyp->nfsly_flags = NFSLY_FILES; 4857 if (retonclose != 0) 4858 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4859 lyp->nfsly_fhlen = fhlen; 4860 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 4861 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4862 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 4863 nfsly_hash); 4864 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4865 nfscl_layoutcnt++; 4866 } else { 4867 if (retonclose != 0) 4868 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4869 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4870 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4871 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4872 } 4873 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 4874 if (NFSCL_FORCEDISM(mp)) { 4875 NFSUNLOCKCLSTATE(); 4876 if (tlyp != NULL) 4877 free(tlyp, M_NFSLAYOUT); 4878 return (EPERM); 4879 } 4880 *lypp = lyp; 4881 } else 4882 lyp->nfsly_stateid.seqid = stateidp->seqid; 4883 4884 /* Merge the new list of File Layouts into the list. */ 4885 flp = LIST_FIRST(fhlp); 4886 if (flp != NULL) { 4887 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 4888 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 4889 else 4890 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 4891 } 4892 if (layout_passed_in != 0) 4893 nfsv4_unlock(&lyp->nfsly_lock, 1); 4894 NFSUNLOCKCLSTATE(); 4895 if (tlyp != NULL) 4896 free(tlyp, M_NFSLAYOUT); 4897 return (0); 4898 } 4899 4900 /* 4901 * Search for a layout by MDS file handle. 4902 * If one is found, it is returned with a refcnt (shared lock) iff 4903 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 4904 * returned NULL. 4905 */ 4906 struct nfscllayout * 4907 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 4908 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 4909 { 4910 struct nfscllayout *lyp; 4911 mount_t mp; 4912 int error, igotlock; 4913 4914 mp = clp->nfsc_nmp->nm_mountp; 4915 *recalledp = 0; 4916 *retflpp = NULL; 4917 NFSLOCKCLSTATE(); 4918 lyp = nfscl_findlayout(clp, fhp, fhlen); 4919 if (lyp != NULL) { 4920 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4921 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4922 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4923 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4924 error = nfscl_findlayoutforio(lyp, off, 4925 NFSV4OPEN_ACCESSREAD, retflpp); 4926 if (error == 0) 4927 nfsv4_getref(&lyp->nfsly_lock, NULL, 4928 NFSCLSTATEMUTEXPTR, mp); 4929 else { 4930 do { 4931 igotlock = nfsv4_lock(&lyp->nfsly_lock, 4932 1, NULL, NFSCLSTATEMUTEXPTR, mp); 4933 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp)); 4934 *retflpp = NULL; 4935 } 4936 if (NFSCL_FORCEDISM(mp)) { 4937 lyp = NULL; 4938 *recalledp = 1; 4939 } 4940 } else { 4941 lyp = NULL; 4942 *recalledp = 1; 4943 } 4944 } 4945 NFSUNLOCKCLSTATE(); 4946 return (lyp); 4947 } 4948 4949 /* 4950 * Search for a layout by MDS file handle. If one is found, mark in to be 4951 * recalled, if it already marked "return on close". 4952 */ 4953 static void 4954 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp, 4955 int fhlen, struct nfsclrecalllayout **recallpp) 4956 { 4957 struct nfscllayout *lyp; 4958 uint32_t iomode; 4959 4960 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) || 4961 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 || 4962 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0) 4963 return; 4964 lyp = nfscl_findlayout(clp, fhp, fhlen); 4965 if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE | 4966 NFSLY_RECALL)) == NFSLY_RETONCLOSE) { 4967 iomode = 0; 4968 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 4969 iomode |= NFSLAYOUTIOMODE_READ; 4970 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 4971 iomode |= NFSLAYOUTIOMODE_RW; 4972 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 4973 0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL, 4974 *recallpp); 4975 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode); 4976 *recallpp = NULL; 4977 } 4978 } 4979 4980 /* 4981 * Mark the layout to be recalled and with an error. 4982 * Also, disable the dsp from further use. 4983 */ 4984 void 4985 nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp, 4986 struct nfscllayout *lyp, struct nfsclds *dsp) 4987 { 4988 struct nfsclrecalllayout *recallp; 4989 uint32_t iomode; 4990 4991 printf("DS being disabled, error=%d\n", stat); 4992 /* Set up the return of the layout. */ 4993 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 4994 iomode = 0; 4995 NFSLOCKCLSTATE(); 4996 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4997 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 4998 iomode |= NFSLAYOUTIOMODE_READ; 4999 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 5000 iomode |= NFSLAYOUTIOMODE_RW; 5001 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 5002 0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op, 5003 dp->nfsdi_deviceid, recallp); 5004 NFSUNLOCKCLSTATE(); 5005 NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode); 5006 } else { 5007 NFSUNLOCKCLSTATE(); 5008 free(recallp, M_NFSLAYRECALL); 5009 } 5010 5011 /* And shut the TCP connection down. */ 5012 nfscl_cancelreqs(dsp); 5013 } 5014 5015 /* 5016 * Cancel all RPCs for this "dsp" by closing the connection. 5017 * Also, mark the session as defunct. 5018 * If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and 5019 * cannot be shut down. 5020 */ 5021 APPLESTATIC void 5022 nfscl_cancelreqs(struct nfsclds *dsp) 5023 { 5024 struct __rpc_client *cl; 5025 static int non_event; 5026 5027 NFSLOCKDS(dsp); 5028 if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 && 5029 dsp->nfsclds_sockp != NULL && 5030 dsp->nfsclds_sockp->nr_client != NULL) { 5031 dsp->nfsclds_flags |= NFSCLDS_CLOSED; 5032 cl = dsp->nfsclds_sockp->nr_client; 5033 dsp->nfsclds_sess.nfsess_defunct = 1; 5034 NFSUNLOCKDS(dsp); 5035 CLNT_CLOSE(cl); 5036 /* 5037 * This 1sec sleep is done to reduce the number of reconnect 5038 * attempts made on the DS while it has failed. 5039 */ 5040 tsleep(&non_event, PVFS, "ndscls", hz); 5041 return; 5042 } 5043 NFSUNLOCKDS(dsp); 5044 } 5045 5046 /* 5047 * Dereference a layout. 5048 */ 5049 void 5050 nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 5051 { 5052 5053 NFSLOCKCLSTATE(); 5054 if (exclocked != 0) 5055 nfsv4_unlock(&lyp->nfsly_lock, 0); 5056 else 5057 nfsv4_relref(&lyp->nfsly_lock); 5058 NFSUNLOCKCLSTATE(); 5059 } 5060 5061 /* 5062 * Search for a devinfo by deviceid. If one is found, return it after 5063 * acquiring a reference count on it. 5064 */ 5065 struct nfscldevinfo * 5066 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 5067 struct nfscldevinfo *dip) 5068 { 5069 5070 NFSLOCKCLSTATE(); 5071 if (dip == NULL) 5072 dip = nfscl_finddevinfo(clp, deviceid); 5073 if (dip != NULL) 5074 dip->nfsdi_refcnt++; 5075 NFSUNLOCKCLSTATE(); 5076 return (dip); 5077 } 5078 5079 /* 5080 * Dereference a devinfo structure. 5081 */ 5082 static void 5083 nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 5084 { 5085 5086 dip->nfsdi_refcnt--; 5087 if (dip->nfsdi_refcnt == 0) 5088 wakeup(&dip->nfsdi_refcnt); 5089 } 5090 5091 /* 5092 * Dereference a devinfo structure. 5093 */ 5094 void 5095 nfscl_reldevinfo(struct nfscldevinfo *dip) 5096 { 5097 5098 NFSLOCKCLSTATE(); 5099 nfscl_reldevinfo_locked(dip); 5100 NFSUNLOCKCLSTATE(); 5101 } 5102 5103 /* 5104 * Find a layout for this file handle. Return NULL upon failure. 5105 */ 5106 static struct nfscllayout * 5107 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 5108 { 5109 struct nfscllayout *lyp; 5110 5111 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 5112 if (lyp->nfsly_fhlen == fhlen && 5113 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 5114 break; 5115 return (lyp); 5116 } 5117 5118 /* 5119 * Find a devinfo for this deviceid. Return NULL upon failure. 5120 */ 5121 static struct nfscldevinfo * 5122 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 5123 { 5124 struct nfscldevinfo *dip; 5125 5126 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 5127 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 5128 == 0) 5129 break; 5130 return (dip); 5131 } 5132 5133 /* 5134 * Merge the new file layout list into the main one, maintaining it in 5135 * increasing offset order. 5136 */ 5137 static void 5138 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 5139 struct nfsclflayouthead *newfhlp) 5140 { 5141 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 5142 5143 flp = LIST_FIRST(fhlp); 5144 prevflp = NULL; 5145 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 5146 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 5147 prevflp = flp; 5148 flp = LIST_NEXT(flp, nfsfl_list); 5149 } 5150 if (prevflp == NULL) 5151 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 5152 else 5153 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 5154 prevflp = nflp; 5155 } 5156 } 5157 5158 /* 5159 * Add this nfscldevinfo to the client, if it doesn't already exist. 5160 * This function consumes the structure pointed at by dip, if not NULL. 5161 */ 5162 APPLESTATIC int 5163 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind, 5164 struct nfsclflayout *flp) 5165 { 5166 struct nfsclclient *clp; 5167 struct nfscldevinfo *tdip; 5168 uint8_t *dev; 5169 5170 NFSLOCKCLSTATE(); 5171 clp = nmp->nm_clp; 5172 if (clp == NULL) { 5173 NFSUNLOCKCLSTATE(); 5174 if (dip != NULL) 5175 free(dip, M_NFSDEVINFO); 5176 return (ENODEV); 5177 } 5178 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5179 dev = flp->nfsfl_dev; 5180 else 5181 dev = flp->nfsfl_ffm[ind].dev; 5182 tdip = nfscl_finddevinfo(clp, dev); 5183 if (tdip != NULL) { 5184 tdip->nfsdi_layoutrefs++; 5185 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5186 flp->nfsfl_devp = tdip; 5187 else 5188 flp->nfsfl_ffm[ind].devp = tdip; 5189 nfscl_reldevinfo_locked(tdip); 5190 NFSUNLOCKCLSTATE(); 5191 if (dip != NULL) 5192 free(dip, M_NFSDEVINFO); 5193 return (0); 5194 } 5195 if (dip != NULL) { 5196 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5197 dip->nfsdi_layoutrefs = 1; 5198 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) 5199 flp->nfsfl_devp = dip; 5200 else 5201 flp->nfsfl_ffm[ind].devp = dip; 5202 } 5203 NFSUNLOCKCLSTATE(); 5204 if (dip == NULL) 5205 return (ENODEV); 5206 return (0); 5207 } 5208 5209 /* 5210 * Free up a layout structure and associated file layout structure(s). 5211 */ 5212 APPLESTATIC void 5213 nfscl_freelayout(struct nfscllayout *layp) 5214 { 5215 struct nfsclflayout *flp, *nflp; 5216 struct nfsclrecalllayout *rp, *nrp; 5217 5218 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5219 LIST_REMOVE(flp, nfsfl_list); 5220 nfscl_freeflayout(flp); 5221 } 5222 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5223 LIST_REMOVE(flp, nfsfl_list); 5224 nfscl_freeflayout(flp); 5225 } 5226 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5227 LIST_REMOVE(rp, nfsrecly_list); 5228 free(rp, M_NFSLAYRECALL); 5229 } 5230 nfscl_layoutcnt--; 5231 free(layp, M_NFSLAYOUT); 5232 } 5233 5234 /* 5235 * Free up a file layout structure. 5236 */ 5237 APPLESTATIC void 5238 nfscl_freeflayout(struct nfsclflayout *flp) 5239 { 5240 int i, j; 5241 5242 if ((flp->nfsfl_flags & NFSFL_FILE) != 0) { 5243 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5244 free(flp->nfsfl_fh[i], M_NFSFH); 5245 if (flp->nfsfl_devp != NULL) 5246 flp->nfsfl_devp->nfsdi_layoutrefs--; 5247 } 5248 if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0) 5249 for (i = 0; i < flp->nfsfl_mirrorcnt; i++) { 5250 for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++) 5251 free(flp->nfsfl_ffm[i].fh[j], M_NFSFH); 5252 if (flp->nfsfl_ffm[i].devp != NULL) 5253 flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--; 5254 } 5255 free(flp, M_NFSFLAYOUT); 5256 } 5257 5258 /* 5259 * Free up a file layout devinfo structure. 5260 */ 5261 APPLESTATIC void 5262 nfscl_freedevinfo(struct nfscldevinfo *dip) 5263 { 5264 5265 free(dip, M_NFSDEVINFO); 5266 } 5267 5268 /* 5269 * Mark any layouts that match as recalled. 5270 */ 5271 static int 5272 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5273 uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op, 5274 char *devid, struct nfsclrecalllayout *recallp) 5275 { 5276 struct nfsclrecalllayout *rp, *orp; 5277 5278 recallp->nfsrecly_recalltype = recalltype; 5279 recallp->nfsrecly_iomode = iomode; 5280 recallp->nfsrecly_stateseqid = stateseqid; 5281 recallp->nfsrecly_off = off; 5282 recallp->nfsrecly_len = len; 5283 recallp->nfsrecly_stat = stat; 5284 recallp->nfsrecly_op = op; 5285 if (devid != NULL) 5286 NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID); 5287 /* 5288 * Order the list as file returns first, followed by fsid and any 5289 * returns, both in increasing stateseqid order. 5290 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5291 * (I'm not sure this is correct because I find RFC5661 confusing 5292 * on this, but hopefully it will work ok.) 5293 */ 5294 orp = NULL; 5295 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5296 orp = rp; 5297 if ((recalltype == NFSLAYOUTRETURN_FILE && 5298 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5299 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5300 (recalltype != NFSLAYOUTRETURN_FILE && 5301 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5302 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5303 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5304 break; 5305 } 5306 5307 /* 5308 * Put any error return on all the file returns that will 5309 * preceed this one. 5310 */ 5311 if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE && 5312 stat != 0 && rp->nfsrecly_stat == 0) { 5313 rp->nfsrecly_stat = stat; 5314 rp->nfsrecly_op = op; 5315 if (devid != NULL) 5316 NFSBCOPY(devid, rp->nfsrecly_devid, 5317 NFSX_V4DEVICEID); 5318 } 5319 } 5320 if (rp == NULL) { 5321 if (orp == NULL) 5322 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5323 nfsrecly_list); 5324 else 5325 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5326 } 5327 lyp->nfsly_flags |= NFSLY_RECALL; 5328 wakeup(lyp->nfsly_clp); 5329 return (0); 5330 } 5331 5332 /* 5333 * Compare the two seqids for ordering. The trick is that the seqids can 5334 * wrap around from 0xffffffff->0, so check for the cases where one 5335 * has wrapped around. 5336 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5337 */ 5338 static int 5339 nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5340 { 5341 5342 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5343 /* seqid2 has wrapped around. */ 5344 return (0); 5345 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5346 /* seqid1 has wrapped around. */ 5347 return (1); 5348 if (seqid1 <= seqid2) 5349 return (1); 5350 return (0); 5351 } 5352 5353 /* 5354 * Do a layout return for each of the recalls. 5355 */ 5356 static void 5357 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5358 struct ucred *cred, NFSPROC_T *p) 5359 { 5360 struct nfsclrecalllayout *rp; 5361 nfsv4stateid_t stateid; 5362 int layouttype; 5363 5364 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5365 stateid.seqid = lyp->nfsly_stateid.seqid; 5366 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5367 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5368 else 5369 layouttype = NFSLAYOUT_FLEXFILE; 5370 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5371 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5372 lyp->nfsly_fhlen, 0, layouttype, 5373 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5374 rp->nfsrecly_off, rp->nfsrecly_len, 5375 &stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op, 5376 rp->nfsrecly_devid); 5377 } 5378 } 5379 5380 /* 5381 * Do the layout commit for a file layout. 5382 */ 5383 static void 5384 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5385 struct ucred *cred, NFSPROC_T *p) 5386 { 5387 struct nfsclflayout *flp; 5388 uint64_t len; 5389 int error, layouttype; 5390 5391 if ((lyp->nfsly_flags & NFSLY_FILES) != 0) 5392 layouttype = NFSLAYOUT_NFSV4_1_FILES; 5393 else 5394 layouttype = NFSLAYOUT_FLEXFILE; 5395 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5396 if (layouttype == NFSLAYOUT_FLEXFILE && 5397 (flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) { 5398 NFSCL_DEBUG(4, "Flex file: no layoutcommit\n"); 5399 /* If not supported, don't bother doing it. */ 5400 NFSLOCKMNT(nmp); 5401 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5402 NFSUNLOCKMNT(nmp); 5403 break; 5404 } else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5405 len = flp->nfsfl_end - flp->nfsfl_off; 5406 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5407 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5408 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5409 layouttype, cred, p, NULL); 5410 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5411 if (error == NFSERR_NOTSUPP) { 5412 /* If not supported, don't bother doing it. */ 5413 NFSLOCKMNT(nmp); 5414 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5415 NFSUNLOCKMNT(nmp); 5416 break; 5417 } 5418 } 5419 } 5420 } 5421 5422 /* 5423 * Commit all layouts for a file (vnode). 5424 */ 5425 int 5426 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5427 { 5428 struct nfsclclient *clp; 5429 struct nfscllayout *lyp; 5430 struct nfsnode *np = VTONFS(vp); 5431 mount_t mp; 5432 struct nfsmount *nmp; 5433 5434 mp = vnode_mount(vp); 5435 nmp = VFSTONFS(mp); 5436 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5437 return (0); 5438 NFSLOCKCLSTATE(); 5439 clp = nmp->nm_clp; 5440 if (clp == NULL) { 5441 NFSUNLOCKCLSTATE(); 5442 return (EPERM); 5443 } 5444 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5445 if (lyp == NULL) { 5446 NFSUNLOCKCLSTATE(); 5447 return (EPERM); 5448 } 5449 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5450 if (NFSCL_FORCEDISM(mp)) { 5451 NFSUNLOCKCLSTATE(); 5452 return (EPERM); 5453 } 5454 tryagain: 5455 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5456 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5457 NFSUNLOCKCLSTATE(); 5458 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5459 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5460 NFSLOCKCLSTATE(); 5461 goto tryagain; 5462 } 5463 nfsv4_relref(&lyp->nfsly_lock); 5464 NFSUNLOCKCLSTATE(); 5465 return (0); 5466 } 5467 5468