1 /*- 2 * Copyright (c) 2009 Rick Macklem, University of Guelph 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * These functions implement the client side state handling for NFSv4. 33 * NFSv4 state handling: 34 * - A lockowner is used to determine lock contention, so it 35 * corresponds directly to a Posix pid. (1 to 1 mapping) 36 * - The correct granularity of an OpenOwner is not nearly so 37 * obvious. An OpenOwner does the following: 38 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner 39 * - is used to check for Open/Share contention (not applicable to 40 * this client, since all Opens are Deny_None) 41 * As such, I considered both extreme. 42 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes 43 * all Open, Close and Lock (with a new lockowner) Ops. 44 * 1 OpenOwner for each Open - This one results in an OpenConfirm for 45 * every Open, for most servers. 46 * So, I chose to use the same mapping as I did for LockOwnwers. 47 * The main concern here is that you can end up with multiple Opens 48 * for the same File Handle, but on different OpenOwners (opens 49 * inherited from parents, grandparents...) and you do not know 50 * which of these the vnodeop close applies to. This is handled by 51 * delaying the Close Op(s) until all of the Opens have been closed. 52 * (It is not yet obvious if this is the correct granularity.) 53 * - How the code handles serialization: 54 * - For the ClientId, it uses an exclusive lock while getting its 55 * SetClientId and during recovery. Otherwise, it uses a shared 56 * lock via a reference count. 57 * - For the rest of the data structures, it uses an SMP mutex 58 * (once the nfs client is SMP safe) and doesn't sleep while 59 * manipulating the linked lists. 60 * - The serialization of Open/Close/Lock/LockU falls out in the 61 * "wash", since OpenOwners and LockOwners are both mapped from 62 * Posix pid. In other words, there is only one Posix pid using 63 * any given owner, so that owner is serialized. (If you change 64 * the granularity of the OpenOwner, then code must be added to 65 * serialize Ops on the OpenOwner.) 66 * - When to get rid of OpenOwners and LockOwners. 67 * - The function nfscl_cleanup_common() is executed after a process exits. 68 * It goes through the client list looking for all Open and Lock Owners. 69 * When one is found, it is marked "defunct" or in the case of 70 * an OpenOwner without any Opens, freed. 71 * The renew thread scans for defunct Owners and gets rid of them, 72 * if it can. The LockOwners will also be deleted when the 73 * associated Open is closed. 74 * - If the LockU or Close Op(s) fail during close in a way 75 * that could be recovered upon retry, they are relinked to the 76 * ClientId's defunct open list and retried by the renew thread 77 * until they succeed or an unmount/recovery occurs. 78 * (Since we are done with them, they do not need to be recovered.) 79 */ 80 81 #ifndef APPLEKEXT 82 #include <fs/nfs/nfsport.h> 83 84 /* 85 * Global variables 86 */ 87 extern struct nfsstatsv1 nfsstatsv1; 88 extern struct nfsreqhead nfsd_reqq; 89 extern u_int32_t newnfs_false, newnfs_true; 90 extern int nfscl_debuglevel; 91 extern int nfscl_enablecallb; 92 extern int nfs_numnfscbd; 93 NFSREQSPINLOCK; 94 NFSCLSTATEMUTEX; 95 int nfscl_inited = 0; 96 struct nfsclhead nfsclhead; /* Head of clientid list */ 97 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER; 98 int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER; 99 #endif /* !APPLEKEXT */ 100 101 static int nfscl_delegcnt = 0; 102 static int nfscl_layoutcnt = 0; 103 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *, 104 u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **); 105 static void nfscl_clrelease(struct nfsclclient *); 106 static void nfscl_cleanclient(struct nfsclclient *); 107 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *, 108 struct ucred *, NFSPROC_T *); 109 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *, 110 struct nfsmount *, struct ucred *, NFSPROC_T *); 111 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *); 112 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *, 113 struct nfscllock *, int); 114 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **, 115 struct nfscllock **, int); 116 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *); 117 static u_int32_t nfscl_nextcbident(void); 118 static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **); 119 static struct nfsclclient *nfscl_getclnt(u_int32_t); 120 static struct nfsclclient *nfscl_getclntsess(uint8_t *); 121 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *, 122 int); 123 static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *, 124 int, struct nfsclrecalllayout **); 125 static void nfscl_reldevinfo_locked(struct nfscldevinfo *); 126 static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *, 127 int); 128 static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *); 129 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *, 130 u_int8_t *, struct nfscllock **); 131 static void nfscl_freealllocks(struct nfscllockownerhead *, int); 132 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int, 133 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **); 134 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *, 135 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **, 136 struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *); 137 static int nfscl_moveopen(vnode_t , struct nfsclclient *, 138 struct nfsmount *, struct nfsclopen *, struct nfsclowner *, 139 struct nfscldeleg *, struct ucred *, NFSPROC_T *); 140 static void nfscl_totalrecall(struct nfsclclient *); 141 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *, 142 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *); 143 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int, 144 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int, 145 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *); 146 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *, 147 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short, 148 struct ucred *, NFSPROC_T *); 149 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t, 150 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *); 151 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *); 152 static int nfscl_errmap(struct nfsrv_descript *, u_int32_t); 153 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *); 154 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *, 155 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int); 156 static void nfscl_freeopenowner(struct nfsclowner *, int); 157 static void nfscl_cleandeleg(struct nfscldeleg *); 158 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *, 159 struct nfsmount *, NFSPROC_T *); 160 static void nfscl_emptylockowner(struct nfscllockowner *, 161 struct nfscllockownerfhhead *); 162 static void nfscl_mergeflayouts(struct nfsclflayouthead *, 163 struct nfsclflayouthead *); 164 static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t, 165 uint64_t, uint32_t, struct nfsclrecalllayout *); 166 static int nfscl_seq(uint32_t, uint32_t); 167 static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *, 168 struct ucred *, NFSPROC_T *); 169 static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *, 170 struct ucred *, NFSPROC_T *); 171 172 static short nfscberr_null[] = { 173 0, 174 0, 175 }; 176 177 static short nfscberr_getattr[] = { 178 NFSERR_RESOURCE, 179 NFSERR_BADHANDLE, 180 NFSERR_BADXDR, 181 NFSERR_RESOURCE, 182 NFSERR_SERVERFAULT, 183 0, 184 }; 185 186 static short nfscberr_recall[] = { 187 NFSERR_RESOURCE, 188 NFSERR_BADHANDLE, 189 NFSERR_BADSTATEID, 190 NFSERR_BADXDR, 191 NFSERR_RESOURCE, 192 NFSERR_SERVERFAULT, 193 0, 194 }; 195 196 static short *nfscl_cberrmap[] = { 197 nfscberr_null, 198 nfscberr_null, 199 nfscberr_null, 200 nfscberr_getattr, 201 nfscberr_recall 202 }; 203 204 #define NETFAMILY(clp) \ 205 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET) 206 207 /* 208 * Called for an open operation. 209 * If the nfhp argument is NULL, just get an openowner. 210 */ 211 APPLESTATIC int 212 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg, 213 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp, 214 struct nfsclopen **opp, int *newonep, int *retp, int lockit) 215 { 216 struct nfsclclient *clp; 217 struct nfsclowner *owp, *nowp; 218 struct nfsclopen *op = NULL, *nop = NULL; 219 struct nfscldeleg *dp; 220 struct nfsclownerhead *ohp; 221 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 222 int ret; 223 224 if (newonep != NULL) 225 *newonep = 0; 226 if (opp != NULL) 227 *opp = NULL; 228 if (owpp != NULL) 229 *owpp = NULL; 230 231 /* 232 * Might need one or both of these, so MALLOC them now, to 233 * avoid a tsleep() in MALLOC later. 234 */ 235 MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner), 236 M_NFSCLOWNER, M_WAITOK); 237 if (nfhp != NULL) 238 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 239 fhlen - 1, M_NFSCLOPEN, M_WAITOK); 240 ret = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 241 if (ret != 0) { 242 FREE((caddr_t)nowp, M_NFSCLOWNER); 243 if (nop != NULL) 244 FREE((caddr_t)nop, M_NFSCLOPEN); 245 return (ret); 246 } 247 248 /* 249 * Get the Open iff it already exists. 250 * If none found, add the new one or return error, depending upon 251 * "create". 252 */ 253 NFSLOCKCLSTATE(); 254 dp = NULL; 255 /* First check the delegation list */ 256 if (nfhp != NULL && usedeleg) { 257 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 258 if (dp->nfsdl_fhlen == fhlen && 259 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 260 if (!(amode & NFSV4OPEN_ACCESSWRITE) || 261 (dp->nfsdl_flags & NFSCLDL_WRITE)) 262 break; 263 dp = NULL; 264 break; 265 } 266 } 267 } 268 269 if (dp != NULL) { 270 nfscl_filllockowner(p->td_proc, own, F_POSIX); 271 ohp = &dp->nfsdl_owner; 272 } else { 273 /* For NFSv4.1 and this option, use a single open_owner. */ 274 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 275 nfscl_filllockowner(NULL, own, F_POSIX); 276 else 277 nfscl_filllockowner(p->td_proc, own, F_POSIX); 278 ohp = &clp->nfsc_owner; 279 } 280 /* Now, search for an openowner */ 281 LIST_FOREACH(owp, ohp, nfsow_list) { 282 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN)) 283 break; 284 } 285 286 /* 287 * Create a new open, as required. 288 */ 289 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen, 290 cred, newonep); 291 292 /* 293 * Now, check the mode on the open and return the appropriate 294 * value. 295 */ 296 if (retp != NULL) { 297 if (nfhp != NULL && dp != NULL && nop == NULL) 298 /* new local open on delegation */ 299 *retp = NFSCLOPEN_SETCRED; 300 else 301 *retp = NFSCLOPEN_OK; 302 } 303 if (op != NULL && (amode & ~(op->nfso_mode))) { 304 op->nfso_mode |= amode; 305 if (retp != NULL && dp == NULL) 306 *retp = NFSCLOPEN_DOOPEN; 307 } 308 309 /* 310 * Serialize modifications to the open owner for multiple threads 311 * within the same process using a read/write sleep lock. 312 * For NFSv4.1 and a single OpenOwner, allow concurrent open operations 313 * by acquiring a shared lock. The close operations still use an 314 * exclusive lock for this case. 315 */ 316 if (lockit != 0) { 317 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) { 318 /* 319 * Get a shared lock on the OpenOwner, but first 320 * wait for any pending exclusive lock, so that the 321 * exclusive locker gets priority. 322 */ 323 nfsv4_lock(&owp->nfsow_rwlock, 0, NULL, 324 NFSCLSTATEMUTEXPTR, NULL); 325 nfsv4_getref(&owp->nfsow_rwlock, NULL, 326 NFSCLSTATEMUTEXPTR, NULL); 327 } else 328 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR); 329 } 330 NFSUNLOCKCLSTATE(); 331 if (nowp != NULL) 332 FREE((caddr_t)nowp, M_NFSCLOWNER); 333 if (nop != NULL) 334 FREE((caddr_t)nop, M_NFSCLOPEN); 335 if (owpp != NULL) 336 *owpp = owp; 337 if (opp != NULL) 338 *opp = op; 339 return (0); 340 } 341 342 /* 343 * Create a new open, as required. 344 */ 345 static void 346 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp, 347 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp, 348 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen, 349 struct ucred *cred, int *newonep) 350 { 351 struct nfsclowner *owp = *owpp, *nowp; 352 struct nfsclopen *op, *nop; 353 354 if (nowpp != NULL) 355 nowp = *nowpp; 356 else 357 nowp = NULL; 358 if (nopp != NULL) 359 nop = *nopp; 360 else 361 nop = NULL; 362 if (owp == NULL && nowp != NULL) { 363 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN); 364 LIST_INIT(&nowp->nfsow_open); 365 nowp->nfsow_clp = clp; 366 nowp->nfsow_seqid = 0; 367 nowp->nfsow_defunct = 0; 368 nfscl_lockinit(&nowp->nfsow_rwlock); 369 if (dp != NULL) { 370 nfsstatsv1.cllocalopenowners++; 371 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list); 372 } else { 373 nfsstatsv1.clopenowners++; 374 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list); 375 } 376 owp = *owpp = nowp; 377 *nowpp = NULL; 378 if (newonep != NULL) 379 *newonep = 1; 380 } 381 382 /* If an fhp has been specified, create an Open as well. */ 383 if (fhp != NULL) { 384 /* and look for the correct open, based upon FH */ 385 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 386 if (op->nfso_fhlen == fhlen && 387 !NFSBCMP(op->nfso_fh, fhp, fhlen)) 388 break; 389 } 390 if (op == NULL && nop != NULL) { 391 nop->nfso_own = owp; 392 nop->nfso_mode = 0; 393 nop->nfso_opencnt = 0; 394 nop->nfso_posixlock = 1; 395 nop->nfso_fhlen = fhlen; 396 NFSBCOPY(fhp, nop->nfso_fh, fhlen); 397 LIST_INIT(&nop->nfso_lock); 398 nop->nfso_stateid.seqid = 0; 399 nop->nfso_stateid.other[0] = 0; 400 nop->nfso_stateid.other[1] = 0; 401 nop->nfso_stateid.other[2] = 0; 402 KASSERT(cred != NULL, ("%s: cred NULL\n", __func__)); 403 newnfs_copyincred(cred, &nop->nfso_cred); 404 if (dp != NULL) { 405 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 406 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 407 nfsdl_list); 408 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 409 nfsstatsv1.cllocalopens++; 410 } else { 411 nfsstatsv1.clopens++; 412 } 413 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list); 414 *opp = nop; 415 *nopp = NULL; 416 if (newonep != NULL) 417 *newonep = 1; 418 } else { 419 *opp = op; 420 } 421 } 422 } 423 424 /* 425 * Called to find/add a delegation to a client. 426 */ 427 APPLESTATIC int 428 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp, 429 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp) 430 { 431 struct nfscldeleg *dp = *dpp, *tdp; 432 433 /* 434 * First, if we have received a Read delegation for a file on a 435 * read/write file system, just return it, because they aren't 436 * useful, imho. 437 */ 438 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) && 439 (dp->nfsdl_flags & NFSCLDL_READ)) { 440 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p); 441 FREE((caddr_t)dp, M_NFSCLDELEG); 442 *dpp = NULL; 443 return (0); 444 } 445 446 /* Look for the correct deleg, based upon FH */ 447 NFSLOCKCLSTATE(); 448 tdp = nfscl_finddeleg(clp, nfhp, fhlen); 449 if (tdp == NULL) { 450 if (dp == NULL) { 451 NFSUNLOCKCLSTATE(); 452 return (NFSERR_BADSTATEID); 453 } 454 *dpp = NULL; 455 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 456 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp, 457 nfsdl_hash); 458 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 459 nfsstatsv1.cldelegates++; 460 nfscl_delegcnt++; 461 } else { 462 /* 463 * Delegation already exists, what do we do if a new one?? 464 */ 465 if (dp != NULL) { 466 printf("Deleg already exists!\n"); 467 FREE((caddr_t)dp, M_NFSCLDELEG); 468 *dpp = NULL; 469 } else { 470 *dpp = tdp; 471 } 472 } 473 NFSUNLOCKCLSTATE(); 474 return (0); 475 } 476 477 /* 478 * Find a delegation for this file handle. Return NULL upon failure. 479 */ 480 static struct nfscldeleg * 481 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 482 { 483 struct nfscldeleg *dp; 484 485 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) { 486 if (dp->nfsdl_fhlen == fhlen && 487 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen)) 488 break; 489 } 490 return (dp); 491 } 492 493 /* 494 * Get a stateid for an I/O operation. First, look for an open and iff 495 * found, return either a lockowner stateid or the open stateid. 496 * If no Open is found, just return error and the special stateid of all zeros. 497 */ 498 APPLESTATIC int 499 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode, 500 int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp, 501 void **lckpp) 502 { 503 struct nfsclclient *clp; 504 struct nfsclowner *owp; 505 struct nfsclopen *op = NULL, *top; 506 struct nfscllockowner *lp; 507 struct nfscldeleg *dp; 508 struct nfsnode *np; 509 struct nfsmount *nmp; 510 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 511 int error, done; 512 513 *lckpp = NULL; 514 /* 515 * Initially, just set the special stateid of all zeros. 516 * (Don't do this for a DS, since the special stateid can't be used.) 517 */ 518 if (fords == 0) { 519 stateidp->seqid = 0; 520 stateidp->other[0] = 0; 521 stateidp->other[1] = 0; 522 stateidp->other[2] = 0; 523 } 524 if (vnode_vtype(vp) != VREG) 525 return (EISDIR); 526 np = VTONFS(vp); 527 nmp = VFSTONFS(vnode_mount(vp)); 528 NFSLOCKCLSTATE(); 529 clp = nfscl_findcl(nmp); 530 if (clp == NULL) { 531 NFSUNLOCKCLSTATE(); 532 return (EACCES); 533 } 534 535 /* 536 * Wait for recovery to complete. 537 */ 538 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG)) 539 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR, 540 PZERO, "nfsrecvr", NULL); 541 542 /* 543 * First, look for a delegation. 544 */ 545 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) { 546 if (dp->nfsdl_fhlen == fhlen && 547 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) { 548 if (!(mode & NFSV4OPEN_ACCESSWRITE) || 549 (dp->nfsdl_flags & NFSCLDL_WRITE)) { 550 stateidp->seqid = dp->nfsdl_stateid.seqid; 551 stateidp->other[0] = dp->nfsdl_stateid.other[0]; 552 stateidp->other[1] = dp->nfsdl_stateid.other[1]; 553 stateidp->other[2] = dp->nfsdl_stateid.other[2]; 554 if (!(np->n_flag & NDELEGRECALL)) { 555 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 556 nfsdl_list); 557 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, 558 nfsdl_list); 559 dp->nfsdl_timestamp = NFSD_MONOSEC + 560 120; 561 dp->nfsdl_rwlock.nfslock_usecnt++; 562 *lckpp = (void *)&dp->nfsdl_rwlock; 563 } 564 NFSUNLOCKCLSTATE(); 565 return (0); 566 } 567 break; 568 } 569 } 570 571 if (p != NULL) { 572 /* 573 * If p != NULL, we want to search the parentage tree 574 * for a matching OpenOwner and use that. 575 */ 576 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 577 nfscl_filllockowner(NULL, own, F_POSIX); 578 else 579 nfscl_filllockowner(p->td_proc, own, F_POSIX); 580 lp = NULL; 581 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own, 582 mode, &lp, &op); 583 if (error == 0 && lp != NULL && fords == 0) { 584 /* Don't return a lock stateid for a DS. */ 585 stateidp->seqid = 586 lp->nfsl_stateid.seqid; 587 stateidp->other[0] = 588 lp->nfsl_stateid.other[0]; 589 stateidp->other[1] = 590 lp->nfsl_stateid.other[1]; 591 stateidp->other[2] = 592 lp->nfsl_stateid.other[2]; 593 NFSUNLOCKCLSTATE(); 594 return (0); 595 } 596 } 597 if (op == NULL) { 598 /* If not found, just look for any OpenOwner that will work. */ 599 top = NULL; 600 done = 0; 601 owp = LIST_FIRST(&clp->nfsc_owner); 602 while (!done && owp != NULL) { 603 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 604 if (op->nfso_fhlen == fhlen && 605 !NFSBCMP(op->nfso_fh, nfhp, fhlen)) { 606 if (top == NULL && (op->nfso_mode & 607 NFSV4OPEN_ACCESSWRITE) != 0 && 608 (mode & NFSV4OPEN_ACCESSREAD) != 0) 609 top = op; 610 if ((mode & op->nfso_mode) == mode) { 611 done = 1; 612 break; 613 } 614 } 615 } 616 if (!done) 617 owp = LIST_NEXT(owp, nfsow_list); 618 } 619 if (!done) { 620 NFSCL_DEBUG(2, "openmode top=%p\n", top); 621 if (top == NULL || NFSHASOPENMODE(nmp)) { 622 NFSUNLOCKCLSTATE(); 623 return (ENOENT); 624 } else 625 op = top; 626 } 627 /* 628 * For read aheads or write behinds, use the open cred. 629 * A read ahead or write behind is indicated by p == NULL. 630 */ 631 if (p == NULL) 632 newnfs_copycred(&op->nfso_cred, cred); 633 } 634 635 /* 636 * No lock stateid, so return the open stateid. 637 */ 638 stateidp->seqid = op->nfso_stateid.seqid; 639 stateidp->other[0] = op->nfso_stateid.other[0]; 640 stateidp->other[1] = op->nfso_stateid.other[1]; 641 stateidp->other[2] = op->nfso_stateid.other[2]; 642 NFSUNLOCKCLSTATE(); 643 return (0); 644 } 645 646 /* 647 * Search for a matching file, mode and, optionally, lockowner. 648 */ 649 static int 650 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen, 651 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode, 652 struct nfscllockowner **lpp, struct nfsclopen **opp) 653 { 654 struct nfsclowner *owp; 655 struct nfsclopen *op, *rop, *rop2; 656 struct nfscllockowner *lp; 657 int keep_looping; 658 659 if (lpp != NULL) 660 *lpp = NULL; 661 /* 662 * rop will be set to the open to be returned. There are three 663 * variants of this, all for an open of the correct file: 664 * 1 - A match of lockown. 665 * 2 - A match of the openown, when no lockown match exists. 666 * 3 - A match for any open, if no openown or lockown match exists. 667 * Looking for #2 over #3 probably isn't necessary, but since 668 * RFC3530 is vague w.r.t. the relationship between openowners and 669 * lockowners, I think this is the safer way to go. 670 */ 671 rop = NULL; 672 rop2 = NULL; 673 keep_looping = 1; 674 /* Search the client list */ 675 owp = LIST_FIRST(ohp); 676 while (owp != NULL && keep_looping != 0) { 677 /* and look for the correct open */ 678 op = LIST_FIRST(&owp->nfsow_open); 679 while (op != NULL && keep_looping != 0) { 680 if (op->nfso_fhlen == fhlen && 681 !NFSBCMP(op->nfso_fh, nfhp, fhlen) 682 && (op->nfso_mode & mode) == mode) { 683 if (lpp != NULL) { 684 /* Now look for a matching lockowner. */ 685 LIST_FOREACH(lp, &op->nfso_lock, 686 nfsl_list) { 687 if (!NFSBCMP(lp->nfsl_owner, 688 lockown, 689 NFSV4CL_LOCKNAMELEN)) { 690 *lpp = lp; 691 rop = op; 692 keep_looping = 0; 693 break; 694 } 695 } 696 } 697 if (rop == NULL && !NFSBCMP(owp->nfsow_owner, 698 openown, NFSV4CL_LOCKNAMELEN)) { 699 rop = op; 700 if (lpp == NULL) 701 keep_looping = 0; 702 } 703 if (rop2 == NULL) 704 rop2 = op; 705 } 706 op = LIST_NEXT(op, nfso_list); 707 } 708 owp = LIST_NEXT(owp, nfsow_list); 709 } 710 if (rop == NULL) 711 rop = rop2; 712 if (rop == NULL) 713 return (EBADF); 714 *opp = rop; 715 return (0); 716 } 717 718 /* 719 * Release use of an open owner. Called when open operations are done 720 * with the open owner. 721 */ 722 APPLESTATIC void 723 nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp, 724 __unused int error, __unused int candelete, int unlocked) 725 { 726 727 if (owp == NULL) 728 return; 729 NFSLOCKCLSTATE(); 730 if (unlocked == 0) { 731 if (NFSHASONEOPENOWN(nmp)) 732 nfsv4_relref(&owp->nfsow_rwlock); 733 else 734 nfscl_lockunlock(&owp->nfsow_rwlock); 735 } 736 nfscl_clrelease(owp->nfsow_clp); 737 NFSUNLOCKCLSTATE(); 738 } 739 740 /* 741 * Release use of an open structure under an open owner. 742 */ 743 APPLESTATIC void 744 nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error, 745 int candelete) 746 { 747 struct nfsclclient *clp; 748 struct nfsclowner *owp; 749 750 if (op == NULL) 751 return; 752 NFSLOCKCLSTATE(); 753 owp = op->nfso_own; 754 if (NFSHASONEOPENOWN(nmp)) 755 nfsv4_relref(&owp->nfsow_rwlock); 756 else 757 nfscl_lockunlock(&owp->nfsow_rwlock); 758 clp = owp->nfsow_clp; 759 if (error && candelete && op->nfso_opencnt == 0) 760 nfscl_freeopen(op, 0); 761 nfscl_clrelease(clp); 762 NFSUNLOCKCLSTATE(); 763 } 764 765 /* 766 * Called to get a clientid structure. It will optionally lock the 767 * client data structures to do the SetClientId/SetClientId_confirm, 768 * but will release that lock and return the clientid with a reference 769 * count on it. 770 * If the "cred" argument is NULL, a new clientid should not be created. 771 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot 772 * be done. 773 * The start_renewthread argument tells nfscl_getcl() to start a renew 774 * thread if this creates a new clp. 775 * It always clpp with a reference count on it, unless returning an error. 776 */ 777 APPLESTATIC int 778 nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p, 779 int start_renewthread, struct nfsclclient **clpp) 780 { 781 struct nfsclclient *clp; 782 struct nfsclclient *newclp = NULL; 783 struct nfsmount *nmp; 784 char uuid[HOSTUUIDLEN]; 785 int igotlock = 0, error, trystalecnt, clidinusedelay, i; 786 u_int16_t idlen = 0; 787 788 nmp = VFSTONFS(mp); 789 if (cred != NULL) { 790 getcredhostuuid(cred, uuid, sizeof uuid); 791 idlen = strlen(uuid); 792 if (idlen > 0) 793 idlen += sizeof (u_int64_t); 794 else 795 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */ 796 MALLOC(newclp, struct nfsclclient *, 797 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT, 798 M_WAITOK | M_ZERO); 799 } 800 NFSLOCKCLSTATE(); 801 /* 802 * If a forced dismount is already in progress, don't 803 * allocate a new clientid and get out now. For the case where 804 * clp != NULL, this is a harmless optimization. 805 */ 806 if (NFSCL_FORCEDISM(mp)) { 807 NFSUNLOCKCLSTATE(); 808 if (newclp != NULL) 809 free(newclp, M_NFSCLCLIENT); 810 return (EBADF); 811 } 812 clp = nmp->nm_clp; 813 if (clp == NULL) { 814 if (newclp == NULL) { 815 NFSUNLOCKCLSTATE(); 816 return (EACCES); 817 } 818 clp = newclp; 819 clp->nfsc_idlen = idlen; 820 LIST_INIT(&clp->nfsc_owner); 821 TAILQ_INIT(&clp->nfsc_deleg); 822 TAILQ_INIT(&clp->nfsc_layout); 823 LIST_INIT(&clp->nfsc_devinfo); 824 for (i = 0; i < NFSCLDELEGHASHSIZE; i++) 825 LIST_INIT(&clp->nfsc_deleghash[i]); 826 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 827 LIST_INIT(&clp->nfsc_layouthash[i]); 828 clp->nfsc_flags = NFSCLFLAGS_INITED; 829 clp->nfsc_clientidrev = 1; 830 clp->nfsc_cbident = nfscl_nextcbident(); 831 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id, 832 clp->nfsc_idlen); 833 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list); 834 nmp->nm_clp = clp; 835 clp->nfsc_nmp = nmp; 836 NFSUNLOCKCLSTATE(); 837 if (start_renewthread != 0) 838 nfscl_start_renewthread(clp); 839 } else { 840 NFSUNLOCKCLSTATE(); 841 if (newclp != NULL) 842 free(newclp, M_NFSCLCLIENT); 843 } 844 NFSLOCKCLSTATE(); 845 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock && 846 !NFSCL_FORCEDISM(mp)) 847 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 848 NFSCLSTATEMUTEXPTR, mp); 849 if (igotlock == 0) { 850 /* 851 * Call nfsv4_lock() with "iwantlock == 0" so that it will 852 * wait for a pending exclusive lock request. This gives the 853 * exclusive lock request priority over this shared lock 854 * request. 855 * An exclusive lock on nfsc_lock is used mainly for server 856 * crash recoveries. 857 */ 858 nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR, mp); 859 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 860 } 861 if (igotlock == 0 && NFSCL_FORCEDISM(mp)) { 862 /* 863 * Both nfsv4_lock() and nfsv4_getref() know to check 864 * for NFSCL_FORCEDISM() and return without sleeping to 865 * wait for the exclusive lock to be released, since it 866 * might be held by nfscl_umount() and we need to get out 867 * now for that case and not wait until nfscl_umount() 868 * releases it. 869 */ 870 NFSUNLOCKCLSTATE(); 871 return (EBADF); 872 } 873 NFSUNLOCKCLSTATE(); 874 875 /* 876 * If it needs a clientid, do the setclientid now. 877 */ 878 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) { 879 if (!igotlock) 880 panic("nfscl_clget"); 881 if (p == NULL || cred == NULL) { 882 NFSLOCKCLSTATE(); 883 nfsv4_unlock(&clp->nfsc_lock, 0); 884 NFSUNLOCKCLSTATE(); 885 return (EACCES); 886 } 887 /* 888 * If RFC3530 Sec. 14.2.33 is taken literally, 889 * NFSERR_CLIDINUSE will be returned persistently for the 890 * case where a new mount of the same file system is using 891 * a different principal. In practice, NFSERR_CLIDINUSE is 892 * only returned when there is outstanding unexpired state 893 * on the clientid. As such, try for twice the lease 894 * interval, if we know what that is. Otherwise, make a 895 * wild ass guess. 896 * The case of returning NFSERR_STALECLIENTID is far less 897 * likely, but might occur if there is a significant delay 898 * between doing the SetClientID and SetClientIDConfirm Ops, 899 * such that the server throws away the clientid before 900 * receiving the SetClientIDConfirm. 901 */ 902 if (clp->nfsc_renew > 0) 903 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2; 904 else 905 clidinusedelay = 120; 906 trystalecnt = 3; 907 do { 908 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 909 if (error == NFSERR_STALECLIENTID || 910 error == NFSERR_STALEDONTRECOVER || 911 error == NFSERR_BADSESSION || 912 error == NFSERR_CLIDINUSE) { 913 (void) nfs_catnap(PZERO, error, "nfs_setcl"); 914 } 915 } while (((error == NFSERR_STALECLIENTID || 916 error == NFSERR_BADSESSION || 917 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) || 918 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0)); 919 if (error) { 920 NFSLOCKCLSTATE(); 921 nfsv4_unlock(&clp->nfsc_lock, 0); 922 NFSUNLOCKCLSTATE(); 923 return (error); 924 } 925 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 926 } 927 if (igotlock) { 928 NFSLOCKCLSTATE(); 929 nfsv4_unlock(&clp->nfsc_lock, 1); 930 NFSUNLOCKCLSTATE(); 931 } 932 933 *clpp = clp; 934 return (0); 935 } 936 937 /* 938 * Get a reference to a clientid and return it, if valid. 939 */ 940 APPLESTATIC struct nfsclclient * 941 nfscl_findcl(struct nfsmount *nmp) 942 { 943 struct nfsclclient *clp; 944 945 clp = nmp->nm_clp; 946 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) 947 return (NULL); 948 return (clp); 949 } 950 951 /* 952 * Release the clientid structure. It may be locked or reference counted. 953 */ 954 static void 955 nfscl_clrelease(struct nfsclclient *clp) 956 { 957 958 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 959 nfsv4_unlock(&clp->nfsc_lock, 0); 960 else 961 nfsv4_relref(&clp->nfsc_lock); 962 } 963 964 /* 965 * External call for nfscl_clrelease. 966 */ 967 APPLESTATIC void 968 nfscl_clientrelease(struct nfsclclient *clp) 969 { 970 971 NFSLOCKCLSTATE(); 972 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK) 973 nfsv4_unlock(&clp->nfsc_lock, 0); 974 else 975 nfsv4_relref(&clp->nfsc_lock); 976 NFSUNLOCKCLSTATE(); 977 } 978 979 /* 980 * Called when wanting to lock a byte region. 981 */ 982 APPLESTATIC int 983 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 984 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp, 985 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp, 986 struct nfscllockowner **lpp, int *newonep, int *donelocallyp) 987 { 988 struct nfscllockowner *lp; 989 struct nfsclopen *op; 990 struct nfsclclient *clp; 991 struct nfscllockowner *nlp; 992 struct nfscllock *nlop, *otherlop; 993 struct nfscldeleg *dp = NULL, *ldp = NULL; 994 struct nfscllockownerhead *lhp = NULL; 995 struct nfsnode *np; 996 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN]; 997 u_int8_t *openownp; 998 int error = 0, ret, donelocally = 0; 999 u_int32_t mode; 1000 1001 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */ 1002 mode = 0; 1003 np = VTONFS(vp); 1004 *lpp = NULL; 1005 lp = NULL; 1006 *newonep = 0; 1007 *donelocallyp = 0; 1008 1009 /* 1010 * Might need these, so MALLOC them now, to 1011 * avoid a tsleep() in MALLOC later. 1012 */ 1013 MALLOC(nlp, struct nfscllockowner *, 1014 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK); 1015 MALLOC(otherlop, struct nfscllock *, 1016 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1017 MALLOC(nlop, struct nfscllock *, 1018 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1019 nlop->nfslo_type = type; 1020 nlop->nfslo_first = off; 1021 if (len == NFS64BITSSET) { 1022 nlop->nfslo_end = NFS64BITSSET; 1023 } else { 1024 nlop->nfslo_end = off + len; 1025 if (nlop->nfslo_end <= nlop->nfslo_first) 1026 error = NFSERR_INVAL; 1027 } 1028 1029 if (!error) { 1030 if (recovery) 1031 clp = rclp; 1032 else 1033 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1034 } 1035 if (error) { 1036 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1037 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1038 FREE((caddr_t)nlop, M_NFSCLLOCK); 1039 return (error); 1040 } 1041 1042 op = NULL; 1043 if (recovery) { 1044 ownp = rownp; 1045 openownp = ropenownp; 1046 } else { 1047 nfscl_filllockowner(id, own, flags); 1048 ownp = own; 1049 if (NFSHASONEOPENOWN(VFSTONFS(vnode_mount(vp)))) 1050 nfscl_filllockowner(NULL, openown, F_POSIX); 1051 else 1052 nfscl_filllockowner(p->td_proc, openown, F_POSIX); 1053 openownp = openown; 1054 } 1055 if (!recovery) { 1056 NFSLOCKCLSTATE(); 1057 /* 1058 * First, search for a delegation. If one exists for this file, 1059 * the lock can be done locally against it, so long as there 1060 * isn't a local lock conflict. 1061 */ 1062 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1063 np->n_fhp->nfh_len); 1064 /* Just sanity check for correct type of delegation */ 1065 if (dp != NULL && ((dp->nfsdl_flags & 1066 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 || 1067 (type == F_WRLCK && 1068 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0))) 1069 dp = NULL; 1070 } 1071 if (dp != NULL) { 1072 /* Now, find an open and maybe a lockowner. */ 1073 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh, 1074 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op); 1075 if (ret) 1076 ret = nfscl_getopen(&clp->nfsc_owner, 1077 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1078 ownp, mode, NULL, &op); 1079 if (!ret) { 1080 lhp = &dp->nfsdl_lock; 1081 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 1082 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list); 1083 dp->nfsdl_timestamp = NFSD_MONOSEC + 120; 1084 donelocally = 1; 1085 } else { 1086 dp = NULL; 1087 } 1088 } 1089 if (!donelocally) { 1090 /* 1091 * Get the related Open and maybe lockowner. 1092 */ 1093 error = nfscl_getopen(&clp->nfsc_owner, 1094 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp, 1095 ownp, mode, &lp, &op); 1096 if (!error) 1097 lhp = &op->nfso_lock; 1098 } 1099 if (!error && !recovery) 1100 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, 1101 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL); 1102 if (error) { 1103 if (!recovery) { 1104 nfscl_clrelease(clp); 1105 NFSUNLOCKCLSTATE(); 1106 } 1107 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1108 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1109 FREE((caddr_t)nlop, M_NFSCLLOCK); 1110 return (error); 1111 } 1112 1113 /* 1114 * Ok, see if a lockowner exists and create one, as required. 1115 */ 1116 if (lp == NULL) 1117 LIST_FOREACH(lp, lhp, nfsl_list) { 1118 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN)) 1119 break; 1120 } 1121 if (lp == NULL) { 1122 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN); 1123 if (recovery) 1124 NFSBCOPY(ropenownp, nlp->nfsl_openowner, 1125 NFSV4CL_LOCKNAMELEN); 1126 else 1127 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner, 1128 NFSV4CL_LOCKNAMELEN); 1129 nlp->nfsl_seqid = 0; 1130 nlp->nfsl_lockflags = flags; 1131 nlp->nfsl_inprog = NULL; 1132 nfscl_lockinit(&nlp->nfsl_rwlock); 1133 LIST_INIT(&nlp->nfsl_lock); 1134 if (donelocally) { 1135 nlp->nfsl_open = NULL; 1136 nfsstatsv1.cllocallockowners++; 1137 } else { 1138 nlp->nfsl_open = op; 1139 nfsstatsv1.cllockowners++; 1140 } 1141 LIST_INSERT_HEAD(lhp, nlp, nfsl_list); 1142 lp = nlp; 1143 nlp = NULL; 1144 *newonep = 1; 1145 } 1146 1147 /* 1148 * Now, update the byte ranges for locks. 1149 */ 1150 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally); 1151 if (!ret) 1152 donelocally = 1; 1153 if (donelocally) { 1154 *donelocallyp = 1; 1155 if (!recovery) 1156 nfscl_clrelease(clp); 1157 } else { 1158 /* 1159 * Serial modifications on the lock owner for multiple threads 1160 * for the same process using a read/write lock. 1161 */ 1162 if (!recovery) 1163 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1164 } 1165 if (!recovery) 1166 NFSUNLOCKCLSTATE(); 1167 1168 if (nlp) 1169 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER); 1170 if (nlop) 1171 FREE((caddr_t)nlop, M_NFSCLLOCK); 1172 if (otherlop) 1173 FREE((caddr_t)otherlop, M_NFSCLLOCK); 1174 1175 *lpp = lp; 1176 return (0); 1177 } 1178 1179 /* 1180 * Called to unlock a byte range, for LockU. 1181 */ 1182 APPLESTATIC int 1183 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len, 1184 __unused struct ucred *cred, NFSPROC_T *p, int callcnt, 1185 struct nfsclclient *clp, void *id, int flags, 1186 struct nfscllockowner **lpp, int *dorpcp) 1187 { 1188 struct nfscllockowner *lp; 1189 struct nfsclowner *owp; 1190 struct nfsclopen *op; 1191 struct nfscllock *nlop, *other_lop = NULL; 1192 struct nfscldeleg *dp; 1193 struct nfsnode *np; 1194 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1195 int ret = 0, fnd; 1196 1197 np = VTONFS(vp); 1198 *lpp = NULL; 1199 *dorpcp = 0; 1200 1201 /* 1202 * Might need these, so MALLOC them now, to 1203 * avoid a tsleep() in MALLOC later. 1204 */ 1205 MALLOC(nlop, struct nfscllock *, 1206 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1207 nlop->nfslo_type = F_UNLCK; 1208 nlop->nfslo_first = off; 1209 if (len == NFS64BITSSET) { 1210 nlop->nfslo_end = NFS64BITSSET; 1211 } else { 1212 nlop->nfslo_end = off + len; 1213 if (nlop->nfslo_end <= nlop->nfslo_first) { 1214 FREE((caddr_t)nlop, M_NFSCLLOCK); 1215 return (NFSERR_INVAL); 1216 } 1217 } 1218 if (callcnt == 0) { 1219 MALLOC(other_lop, struct nfscllock *, 1220 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK); 1221 *other_lop = *nlop; 1222 } 1223 nfscl_filllockowner(id, own, flags); 1224 dp = NULL; 1225 NFSLOCKCLSTATE(); 1226 if (callcnt == 0) 1227 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 1228 np->n_fhp->nfh_len); 1229 1230 /* 1231 * First, unlock any local regions on a delegation. 1232 */ 1233 if (dp != NULL) { 1234 /* Look for this lockowner. */ 1235 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1236 if (!NFSBCMP(lp->nfsl_owner, own, 1237 NFSV4CL_LOCKNAMELEN)) 1238 break; 1239 } 1240 if (lp != NULL) 1241 /* Use other_lop, so nlop is still available */ 1242 (void)nfscl_updatelock(lp, &other_lop, NULL, 1); 1243 } 1244 1245 /* 1246 * Now, find a matching open/lockowner that hasn't already been done, 1247 * as marked by nfsl_inprog. 1248 */ 1249 lp = NULL; 1250 fnd = 0; 1251 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1252 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1253 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1254 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1255 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1256 if (lp->nfsl_inprog == NULL && 1257 !NFSBCMP(lp->nfsl_owner, own, 1258 NFSV4CL_LOCKNAMELEN)) { 1259 fnd = 1; 1260 break; 1261 } 1262 } 1263 if (fnd) 1264 break; 1265 } 1266 } 1267 if (fnd) 1268 break; 1269 } 1270 1271 if (lp != NULL) { 1272 ret = nfscl_updatelock(lp, &nlop, NULL, 0); 1273 if (ret) 1274 *dorpcp = 1; 1275 /* 1276 * Serial modifications on the lock owner for multiple 1277 * threads for the same process using a read/write lock. 1278 */ 1279 lp->nfsl_inprog = p; 1280 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR); 1281 *lpp = lp; 1282 } 1283 NFSUNLOCKCLSTATE(); 1284 if (nlop) 1285 FREE((caddr_t)nlop, M_NFSCLLOCK); 1286 if (other_lop) 1287 FREE((caddr_t)other_lop, M_NFSCLLOCK); 1288 return (0); 1289 } 1290 1291 /* 1292 * Release all lockowners marked in progess for this process and file. 1293 */ 1294 APPLESTATIC void 1295 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p, 1296 void *id, int flags) 1297 { 1298 struct nfsclowner *owp; 1299 struct nfsclopen *op; 1300 struct nfscllockowner *lp; 1301 struct nfsnode *np; 1302 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1303 1304 np = VTONFS(vp); 1305 nfscl_filllockowner(id, own, flags); 1306 NFSLOCKCLSTATE(); 1307 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1308 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1309 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1310 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1311 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1312 if (lp->nfsl_inprog == p && 1313 !NFSBCMP(lp->nfsl_owner, own, 1314 NFSV4CL_LOCKNAMELEN)) { 1315 lp->nfsl_inprog = NULL; 1316 nfscl_lockunlock(&lp->nfsl_rwlock); 1317 } 1318 } 1319 } 1320 } 1321 } 1322 nfscl_clrelease(clp); 1323 NFSUNLOCKCLSTATE(); 1324 } 1325 1326 /* 1327 * Called to find out if any bytes within the byte range specified are 1328 * write locked by the calling process. Used to determine if flushing 1329 * is required before a LockU. 1330 * If in doubt, return 1, so the flush will occur. 1331 */ 1332 APPLESTATIC int 1333 nfscl_checkwritelocked(vnode_t vp, struct flock *fl, 1334 struct ucred *cred, NFSPROC_T *p, void *id, int flags) 1335 { 1336 struct nfsclowner *owp; 1337 struct nfscllockowner *lp; 1338 struct nfsclopen *op; 1339 struct nfsclclient *clp; 1340 struct nfscllock *lop; 1341 struct nfscldeleg *dp; 1342 struct nfsnode *np; 1343 u_int64_t off, end; 1344 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 1345 int error = 0; 1346 1347 np = VTONFS(vp); 1348 switch (fl->l_whence) { 1349 case SEEK_SET: 1350 case SEEK_CUR: 1351 /* 1352 * Caller is responsible for adding any necessary offset 1353 * when SEEK_CUR is used. 1354 */ 1355 off = fl->l_start; 1356 break; 1357 case SEEK_END: 1358 off = np->n_size + fl->l_start; 1359 break; 1360 default: 1361 return (1); 1362 } 1363 if (fl->l_len != 0) { 1364 end = off + fl->l_len; 1365 if (end < off) 1366 return (1); 1367 } else { 1368 end = NFS64BITSSET; 1369 } 1370 1371 error = nfscl_getcl(vnode_mount(vp), cred, p, 1, &clp); 1372 if (error) 1373 return (1); 1374 nfscl_filllockowner(id, own, flags); 1375 NFSLOCKCLSTATE(); 1376 1377 /* 1378 * First check the delegation locks. 1379 */ 1380 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 1381 if (dp != NULL) { 1382 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 1383 if (!NFSBCMP(lp->nfsl_owner, own, 1384 NFSV4CL_LOCKNAMELEN)) 1385 break; 1386 } 1387 if (lp != NULL) { 1388 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1389 if (lop->nfslo_first >= end) 1390 break; 1391 if (lop->nfslo_end <= off) 1392 continue; 1393 if (lop->nfslo_type == F_WRLCK) { 1394 nfscl_clrelease(clp); 1395 NFSUNLOCKCLSTATE(); 1396 return (1); 1397 } 1398 } 1399 } 1400 } 1401 1402 /* 1403 * Now, check state against the server. 1404 */ 1405 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 1406 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1407 if (op->nfso_fhlen == np->n_fhp->nfh_len && 1408 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) { 1409 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1410 if (!NFSBCMP(lp->nfsl_owner, own, 1411 NFSV4CL_LOCKNAMELEN)) 1412 break; 1413 } 1414 if (lp != NULL) { 1415 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 1416 if (lop->nfslo_first >= end) 1417 break; 1418 if (lop->nfslo_end <= off) 1419 continue; 1420 if (lop->nfslo_type == F_WRLCK) { 1421 nfscl_clrelease(clp); 1422 NFSUNLOCKCLSTATE(); 1423 return (1); 1424 } 1425 } 1426 } 1427 } 1428 } 1429 } 1430 nfscl_clrelease(clp); 1431 NFSUNLOCKCLSTATE(); 1432 return (0); 1433 } 1434 1435 /* 1436 * Release a byte range lock owner structure. 1437 */ 1438 APPLESTATIC void 1439 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete) 1440 { 1441 struct nfsclclient *clp; 1442 1443 if (lp == NULL) 1444 return; 1445 NFSLOCKCLSTATE(); 1446 clp = lp->nfsl_open->nfso_own->nfsow_clp; 1447 if (error != 0 && candelete && 1448 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0) 1449 nfscl_freelockowner(lp, 0); 1450 else 1451 nfscl_lockunlock(&lp->nfsl_rwlock); 1452 nfscl_clrelease(clp); 1453 NFSUNLOCKCLSTATE(); 1454 } 1455 1456 /* 1457 * Free up an open structure and any associated byte range lock structures. 1458 */ 1459 APPLESTATIC void 1460 nfscl_freeopen(struct nfsclopen *op, int local) 1461 { 1462 1463 LIST_REMOVE(op, nfso_list); 1464 nfscl_freealllocks(&op->nfso_lock, local); 1465 FREE((caddr_t)op, M_NFSCLOPEN); 1466 if (local) 1467 nfsstatsv1.cllocalopens--; 1468 else 1469 nfsstatsv1.clopens--; 1470 } 1471 1472 /* 1473 * Free up all lock owners and associated locks. 1474 */ 1475 static void 1476 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local) 1477 { 1478 struct nfscllockowner *lp, *nlp; 1479 1480 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) { 1481 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1482 panic("nfscllckw"); 1483 nfscl_freelockowner(lp, local); 1484 } 1485 } 1486 1487 /* 1488 * Called for an Open when NFSERR_EXPIRED is received from the server. 1489 * If there are no byte range locks nor a Share Deny lost, try to do a 1490 * fresh Open. Otherwise, free the open. 1491 */ 1492 static int 1493 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op, 1494 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p) 1495 { 1496 struct nfscllockowner *lp; 1497 struct nfscldeleg *dp; 1498 int mustdelete = 0, error; 1499 1500 /* 1501 * Look for any byte range lock(s). 1502 */ 1503 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 1504 if (!LIST_EMPTY(&lp->nfsl_lock)) { 1505 mustdelete = 1; 1506 break; 1507 } 1508 } 1509 1510 /* 1511 * If no byte range lock(s) nor a Share deny, try to re-open. 1512 */ 1513 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) { 1514 newnfs_copycred(&op->nfso_cred, cred); 1515 dp = NULL; 1516 error = nfsrpc_reopen(nmp, op->nfso_fh, 1517 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p); 1518 if (error) { 1519 mustdelete = 1; 1520 if (dp != NULL) { 1521 FREE((caddr_t)dp, M_NFSCLDELEG); 1522 dp = NULL; 1523 } 1524 } 1525 if (dp != NULL) 1526 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh, 1527 op->nfso_fhlen, cred, p, &dp); 1528 } 1529 1530 /* 1531 * If a byte range lock or Share deny or couldn't re-open, free it. 1532 */ 1533 if (mustdelete) 1534 nfscl_freeopen(op, 0); 1535 return (mustdelete); 1536 } 1537 1538 /* 1539 * Free up an open owner structure. 1540 */ 1541 static void 1542 nfscl_freeopenowner(struct nfsclowner *owp, int local) 1543 { 1544 1545 LIST_REMOVE(owp, nfsow_list); 1546 FREE((caddr_t)owp, M_NFSCLOWNER); 1547 if (local) 1548 nfsstatsv1.cllocalopenowners--; 1549 else 1550 nfsstatsv1.clopenowners--; 1551 } 1552 1553 /* 1554 * Free up a byte range lock owner structure. 1555 */ 1556 APPLESTATIC void 1557 nfscl_freelockowner(struct nfscllockowner *lp, int local) 1558 { 1559 struct nfscllock *lop, *nlop; 1560 1561 LIST_REMOVE(lp, nfsl_list); 1562 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) { 1563 nfscl_freelock(lop, local); 1564 } 1565 FREE((caddr_t)lp, M_NFSCLLOCKOWNER); 1566 if (local) 1567 nfsstatsv1.cllocallockowners--; 1568 else 1569 nfsstatsv1.cllockowners--; 1570 } 1571 1572 /* 1573 * Free up a byte range lock structure. 1574 */ 1575 APPLESTATIC void 1576 nfscl_freelock(struct nfscllock *lop, int local) 1577 { 1578 1579 LIST_REMOVE(lop, nfslo_list); 1580 FREE((caddr_t)lop, M_NFSCLLOCK); 1581 if (local) 1582 nfsstatsv1.cllocallocks--; 1583 else 1584 nfsstatsv1.cllocks--; 1585 } 1586 1587 /* 1588 * Clean out the state related to a delegation. 1589 */ 1590 static void 1591 nfscl_cleandeleg(struct nfscldeleg *dp) 1592 { 1593 struct nfsclowner *owp, *nowp; 1594 struct nfsclopen *op; 1595 1596 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 1597 op = LIST_FIRST(&owp->nfsow_open); 1598 if (op != NULL) { 1599 if (LIST_NEXT(op, nfso_list) != NULL) 1600 panic("nfscleandel"); 1601 nfscl_freeopen(op, 1); 1602 } 1603 nfscl_freeopenowner(owp, 1); 1604 } 1605 nfscl_freealllocks(&dp->nfsdl_lock, 1); 1606 } 1607 1608 /* 1609 * Free a delegation. 1610 */ 1611 static void 1612 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp) 1613 { 1614 1615 TAILQ_REMOVE(hdp, dp, nfsdl_list); 1616 LIST_REMOVE(dp, nfsdl_hash); 1617 FREE((caddr_t)dp, M_NFSCLDELEG); 1618 nfsstatsv1.cldelegates--; 1619 nfscl_delegcnt--; 1620 } 1621 1622 /* 1623 * Free up all state related to this client structure. 1624 */ 1625 static void 1626 nfscl_cleanclient(struct nfsclclient *clp) 1627 { 1628 struct nfsclowner *owp, *nowp; 1629 struct nfsclopen *op, *nop; 1630 1631 /* Now, all the OpenOwners, etc. */ 1632 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1633 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1634 nfscl_freeopen(op, 0); 1635 } 1636 nfscl_freeopenowner(owp, 0); 1637 } 1638 } 1639 1640 /* 1641 * Called when an NFSERR_EXPIRED is received from the server. 1642 */ 1643 static void 1644 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp, 1645 struct ucred *cred, NFSPROC_T *p) 1646 { 1647 struct nfsclowner *owp, *nowp, *towp; 1648 struct nfsclopen *op, *nop, *top; 1649 struct nfscldeleg *dp, *ndp; 1650 int ret, printed = 0; 1651 1652 /* 1653 * First, merge locally issued Opens into the list for the server. 1654 */ 1655 dp = TAILQ_FIRST(&clp->nfsc_deleg); 1656 while (dp != NULL) { 1657 ndp = TAILQ_NEXT(dp, nfsdl_list); 1658 owp = LIST_FIRST(&dp->nfsdl_owner); 1659 while (owp != NULL) { 1660 nowp = LIST_NEXT(owp, nfsow_list); 1661 op = LIST_FIRST(&owp->nfsow_open); 1662 if (op != NULL) { 1663 if (LIST_NEXT(op, nfso_list) != NULL) 1664 panic("nfsclexp"); 1665 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) { 1666 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner, 1667 NFSV4CL_LOCKNAMELEN)) 1668 break; 1669 } 1670 if (towp != NULL) { 1671 /* Merge opens in */ 1672 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) { 1673 if (top->nfso_fhlen == op->nfso_fhlen && 1674 !NFSBCMP(top->nfso_fh, op->nfso_fh, 1675 op->nfso_fhlen)) { 1676 top->nfso_mode |= op->nfso_mode; 1677 top->nfso_opencnt += op->nfso_opencnt; 1678 break; 1679 } 1680 } 1681 if (top == NULL) { 1682 /* Just add the open to the owner list */ 1683 LIST_REMOVE(op, nfso_list); 1684 op->nfso_own = towp; 1685 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list); 1686 nfsstatsv1.cllocalopens--; 1687 nfsstatsv1.clopens++; 1688 } 1689 } else { 1690 /* Just add the openowner to the client list */ 1691 LIST_REMOVE(owp, nfsow_list); 1692 owp->nfsow_clp = clp; 1693 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list); 1694 nfsstatsv1.cllocalopenowners--; 1695 nfsstatsv1.clopenowners++; 1696 nfsstatsv1.cllocalopens--; 1697 nfsstatsv1.clopens++; 1698 } 1699 } 1700 owp = nowp; 1701 } 1702 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) { 1703 printed = 1; 1704 printf("nfsv4 expired locks lost\n"); 1705 } 1706 nfscl_cleandeleg(dp); 1707 nfscl_freedeleg(&clp->nfsc_deleg, dp); 1708 dp = ndp; 1709 } 1710 if (!TAILQ_EMPTY(&clp->nfsc_deleg)) 1711 panic("nfsclexp"); 1712 1713 /* 1714 * Now, try and reopen against the server. 1715 */ 1716 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1717 owp->nfsow_seqid = 0; 1718 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) { 1719 ret = nfscl_expireopen(clp, op, nmp, cred, p); 1720 if (ret && !printed) { 1721 printed = 1; 1722 printf("nfsv4 expired locks lost\n"); 1723 } 1724 } 1725 if (LIST_EMPTY(&owp->nfsow_open)) 1726 nfscl_freeopenowner(owp, 0); 1727 } 1728 } 1729 1730 /* 1731 * This function must be called after the process represented by "own" has 1732 * exited. Must be called with CLSTATE lock held. 1733 */ 1734 static void 1735 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own) 1736 { 1737 struct nfsclowner *owp, *nowp; 1738 struct nfscllockowner *lp, *nlp; 1739 struct nfscldeleg *dp; 1740 1741 /* First, get rid of local locks on delegations. */ 1742 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1743 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1744 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 1745 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED)) 1746 panic("nfscllckw"); 1747 nfscl_freelockowner(lp, 1); 1748 } 1749 } 1750 } 1751 owp = LIST_FIRST(&clp->nfsc_owner); 1752 while (owp != NULL) { 1753 nowp = LIST_NEXT(owp, nfsow_list); 1754 if (!NFSBCMP(owp->nfsow_owner, own, 1755 NFSV4CL_LOCKNAMELEN)) { 1756 /* 1757 * If there are children that haven't closed the 1758 * file descriptors yet, the opens will still be 1759 * here. For that case, let the renew thread clear 1760 * out the OpenOwner later. 1761 */ 1762 if (LIST_EMPTY(&owp->nfsow_open)) 1763 nfscl_freeopenowner(owp, 0); 1764 else 1765 owp->nfsow_defunct = 1; 1766 } 1767 owp = nowp; 1768 } 1769 } 1770 1771 /* 1772 * Find open/lock owners for processes that have exited. 1773 */ 1774 static void 1775 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp) 1776 { 1777 struct nfsclowner *owp, *nowp; 1778 struct nfsclopen *op; 1779 struct nfscllockowner *lp, *nlp; 1780 struct nfscldeleg *dp; 1781 1782 NFSPROCLISTLOCK(); 1783 NFSLOCKCLSTATE(); 1784 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 1785 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 1786 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) { 1787 if (LIST_EMPTY(&lp->nfsl_lock)) 1788 nfscl_emptylockowner(lp, lhp); 1789 } 1790 } 1791 if (nfscl_procdoesntexist(owp->nfsow_owner)) 1792 nfscl_cleanup_common(clp, owp->nfsow_owner); 1793 } 1794 1795 /* 1796 * For the single open_owner case, these lock owners need to be 1797 * checked to see if they still exist separately. 1798 * This is because nfscl_procdoesntexist() never returns true for 1799 * the single open_owner so that the above doesn't ever call 1800 * nfscl_cleanup_common(). 1801 */ 1802 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 1803 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) { 1804 if (nfscl_procdoesntexist(lp->nfsl_owner)) 1805 nfscl_cleanup_common(clp, lp->nfsl_owner); 1806 } 1807 } 1808 NFSUNLOCKCLSTATE(); 1809 NFSPROCLISTUNLOCK(); 1810 } 1811 1812 /* 1813 * Take the empty lock owner and move it to the local lhp list if the 1814 * associated process no longer exists. 1815 */ 1816 static void 1817 nfscl_emptylockowner(struct nfscllockowner *lp, 1818 struct nfscllockownerfhhead *lhp) 1819 { 1820 struct nfscllockownerfh *lfhp, *mylfhp; 1821 struct nfscllockowner *nlp; 1822 int fnd_it; 1823 1824 /* If not a Posix lock owner, just return. */ 1825 if ((lp->nfsl_lockflags & F_POSIX) == 0) 1826 return; 1827 1828 fnd_it = 0; 1829 mylfhp = NULL; 1830 /* 1831 * First, search to see if this lock owner is already in the list. 1832 * If it is, then the associated process no longer exists. 1833 */ 1834 SLIST_FOREACH(lfhp, lhp, nfslfh_list) { 1835 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen && 1836 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh, 1837 lfhp->nfslfh_len)) 1838 mylfhp = lfhp; 1839 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list) 1840 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner, 1841 NFSV4CL_LOCKNAMELEN)) 1842 fnd_it = 1; 1843 } 1844 /* If not found, check if process still exists. */ 1845 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0) 1846 return; 1847 1848 /* Move the lock owner over to the local list. */ 1849 if (mylfhp == NULL) { 1850 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP, 1851 M_NOWAIT); 1852 if (mylfhp == NULL) 1853 return; 1854 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen; 1855 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh, 1856 mylfhp->nfslfh_len); 1857 LIST_INIT(&mylfhp->nfslfh_lock); 1858 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list); 1859 } 1860 LIST_REMOVE(lp, nfsl_list); 1861 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list); 1862 } 1863 1864 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */ 1865 /* 1866 * Called from nfs umount to free up the clientid. 1867 */ 1868 APPLESTATIC void 1869 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p) 1870 { 1871 struct nfsclclient *clp; 1872 struct ucred *cred; 1873 int igotlock; 1874 1875 /* 1876 * For the case that matters, this is the thread that set 1877 * MNTK_UNMOUNTF, so it will see it set. The code that follows is 1878 * done to ensure that any thread executing nfscl_getcl() after 1879 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the 1880 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following 1881 * explanation, courtesy of Alan Cox. 1882 * What follows is a snippet from Alan Cox's email at: 1883 * http://docs.FreeBSD.org/cgi/ 1884 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw 1885 * 1886 * 1. Set MNTK_UNMOUNTF 1887 * 2. Acquire a standard FreeBSD mutex "m". 1888 * 3. Update some data structures. 1889 * 4. Release mutex "m". 1890 * 1891 * Then, other threads that acquire "m" after step 4 has occurred will 1892 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to 1893 * step 2 may or may not see MNTK_UNMOUNTF as set. 1894 */ 1895 NFSLOCKCLSTATE(); 1896 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { 1897 fake_global++; 1898 NFSUNLOCKCLSTATE(); 1899 NFSLOCKCLSTATE(); 1900 } 1901 1902 clp = nmp->nm_clp; 1903 if (clp != NULL) { 1904 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0) 1905 panic("nfscl umount"); 1906 1907 /* 1908 * First, handshake with the nfscl renew thread, to terminate 1909 * it. 1910 */ 1911 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT; 1912 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD) 1913 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, 1914 "nfsclumnt", hz); 1915 1916 /* 1917 * Now, get the exclusive lock on the client state, so 1918 * that no uses of the state are still in progress. 1919 */ 1920 do { 1921 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1922 NFSCLSTATEMUTEXPTR, NULL); 1923 } while (!igotlock); 1924 NFSUNLOCKCLSTATE(); 1925 1926 /* 1927 * Free up all the state. It will expire on the server, but 1928 * maybe we should do a SetClientId/SetClientIdConfirm so 1929 * the server throws it away? 1930 */ 1931 LIST_REMOVE(clp, nfsc_list); 1932 nfscl_delegreturnall(clp, p); 1933 cred = newnfs_getcred(); 1934 if (NFSHASNFSV4N(nmp)) { 1935 (void)nfsrpc_destroysession(nmp, clp, cred, p); 1936 (void)nfsrpc_destroyclient(nmp, clp, cred, p); 1937 } else 1938 (void)nfsrpc_setclient(nmp, clp, 0, cred, p); 1939 nfscl_cleanclient(clp); 1940 nmp->nm_clp = NULL; 1941 NFSFREECRED(cred); 1942 free(clp, M_NFSCLCLIENT); 1943 } else 1944 NFSUNLOCKCLSTATE(); 1945 } 1946 1947 /* 1948 * This function is called when a server replies with NFSERR_STALECLIENTID 1949 * NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists, 1950 * doing Opens and Locks with reclaim. If these fail, it deletes the 1951 * corresponding state. 1952 */ 1953 static void 1954 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p) 1955 { 1956 struct nfsclowner *owp, *nowp; 1957 struct nfsclopen *op, *nop; 1958 struct nfscllockowner *lp, *nlp; 1959 struct nfscllock *lop, *nlop; 1960 struct nfscldeleg *dp, *ndp, *tdp; 1961 struct nfsmount *nmp; 1962 struct ucred *tcred; 1963 struct nfsclopenhead extra_open; 1964 struct nfscldeleghead extra_deleg; 1965 struct nfsreq *rep; 1966 u_int64_t len; 1967 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode; 1968 int i, igotlock = 0, error, trycnt, firstlock; 1969 struct nfscllayout *lyp, *nlyp; 1970 1971 /* 1972 * First, lock the client structure, so everyone else will 1973 * block when trying to use state. 1974 */ 1975 NFSLOCKCLSTATE(); 1976 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 1977 do { 1978 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 1979 NFSCLSTATEMUTEXPTR, NULL); 1980 } while (!igotlock); 1981 NFSUNLOCKCLSTATE(); 1982 1983 nmp = clp->nfsc_nmp; 1984 if (nmp == NULL) 1985 panic("nfscl recover"); 1986 1987 /* 1988 * For now, just get rid of all layouts. There may be a need 1989 * to do LayoutCommit Ops with reclaim == true later. 1990 */ 1991 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) 1992 nfscl_freelayout(lyp); 1993 TAILQ_INIT(&clp->nfsc_layout); 1994 for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++) 1995 LIST_INIT(&clp->nfsc_layouthash[i]); 1996 1997 trycnt = 5; 1998 do { 1999 error = nfsrpc_setclient(nmp, clp, 1, cred, p); 2000 } while ((error == NFSERR_STALECLIENTID || 2001 error == NFSERR_BADSESSION || 2002 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2003 if (error) { 2004 NFSLOCKCLSTATE(); 2005 clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER | 2006 NFSCLFLAGS_RECVRINPROG); 2007 wakeup(&clp->nfsc_flags); 2008 nfsv4_unlock(&clp->nfsc_lock, 0); 2009 NFSUNLOCKCLSTATE(); 2010 return; 2011 } 2012 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2013 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2014 2015 /* 2016 * Mark requests already queued on the server, so that they don't 2017 * initiate another recovery cycle. Any requests already in the 2018 * queue that handle state information will have the old stale 2019 * clientid/stateid and will get a NFSERR_STALESTATEID, 2020 * NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server. 2021 * This will be translated to NFSERR_STALEDONTRECOVER when 2022 * R_DONTRECOVER is set. 2023 */ 2024 NFSLOCKREQ(); 2025 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) { 2026 if (rep->r_nmp == nmp) 2027 rep->r_flags |= R_DONTRECOVER; 2028 } 2029 NFSUNLOCKREQ(); 2030 2031 /* 2032 * Now, mark all delegations "need reclaim". 2033 */ 2034 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) 2035 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM; 2036 2037 TAILQ_INIT(&extra_deleg); 2038 LIST_INIT(&extra_open); 2039 /* 2040 * Now traverse the state lists, doing Open and Lock Reclaims. 2041 */ 2042 tcred = newnfs_getcred(); 2043 owp = LIST_FIRST(&clp->nfsc_owner); 2044 while (owp != NULL) { 2045 nowp = LIST_NEXT(owp, nfsow_list); 2046 owp->nfsow_seqid = 0; 2047 op = LIST_FIRST(&owp->nfsow_open); 2048 while (op != NULL) { 2049 nop = LIST_NEXT(op, nfso_list); 2050 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2051 /* Search for a delegation to reclaim with the open */ 2052 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2053 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2054 continue; 2055 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2056 mode = NFSV4OPEN_ACCESSWRITE; 2057 delegtype = NFSV4OPEN_DELEGATEWRITE; 2058 } else { 2059 mode = NFSV4OPEN_ACCESSREAD; 2060 delegtype = NFSV4OPEN_DELEGATEREAD; 2061 } 2062 if ((op->nfso_mode & mode) == mode && 2063 op->nfso_fhlen == dp->nfsdl_fhlen && 2064 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen)) 2065 break; 2066 } 2067 ndp = dp; 2068 if (dp == NULL) 2069 delegtype = NFSV4OPEN_DELEGATENONE; 2070 newnfs_copycred(&op->nfso_cred, tcred); 2071 error = nfscl_tryopen(nmp, NULL, op->nfso_fh, 2072 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen, 2073 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype, 2074 tcred, p); 2075 if (!error) { 2076 /* Handle any replied delegation */ 2077 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE) 2078 || NFSMNT_RDONLY(nmp->nm_mountp))) { 2079 if ((ndp->nfsdl_flags & NFSCLDL_WRITE)) 2080 mode = NFSV4OPEN_ACCESSWRITE; 2081 else 2082 mode = NFSV4OPEN_ACCESSREAD; 2083 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2084 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) 2085 continue; 2086 if ((op->nfso_mode & mode) == mode && 2087 op->nfso_fhlen == dp->nfsdl_fhlen && 2088 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, 2089 op->nfso_fhlen)) { 2090 dp->nfsdl_stateid = ndp->nfsdl_stateid; 2091 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit; 2092 dp->nfsdl_ace = ndp->nfsdl_ace; 2093 dp->nfsdl_change = ndp->nfsdl_change; 2094 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2095 if ((ndp->nfsdl_flags & NFSCLDL_RECALL)) 2096 dp->nfsdl_flags |= NFSCLDL_RECALL; 2097 FREE((caddr_t)ndp, M_NFSCLDELEG); 2098 ndp = NULL; 2099 break; 2100 } 2101 } 2102 } 2103 if (ndp != NULL) 2104 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list); 2105 2106 /* and reclaim all byte range locks */ 2107 lp = LIST_FIRST(&op->nfso_lock); 2108 while (lp != NULL) { 2109 nlp = LIST_NEXT(lp, nfsl_list); 2110 lp->nfsl_seqid = 0; 2111 firstlock = 1; 2112 lop = LIST_FIRST(&lp->nfsl_lock); 2113 while (lop != NULL) { 2114 nlop = LIST_NEXT(lop, nfslo_list); 2115 if (lop->nfslo_end == NFS64BITSSET) 2116 len = NFS64BITSSET; 2117 else 2118 len = lop->nfslo_end - lop->nfslo_first; 2119 error = nfscl_trylock(nmp, NULL, 2120 op->nfso_fh, op->nfso_fhlen, lp, 2121 firstlock, 1, lop->nfslo_first, len, 2122 lop->nfslo_type, tcred, p); 2123 if (error != 0) 2124 nfscl_freelock(lop, 0); 2125 else 2126 firstlock = 0; 2127 lop = nlop; 2128 } 2129 /* If no locks, but a lockowner, just delete it. */ 2130 if (LIST_EMPTY(&lp->nfsl_lock)) 2131 nfscl_freelockowner(lp, 0); 2132 lp = nlp; 2133 } 2134 } 2135 } 2136 if (error != 0 && error != NFSERR_BADSESSION) 2137 nfscl_freeopen(op, 0); 2138 op = nop; 2139 } 2140 owp = nowp; 2141 } 2142 2143 /* 2144 * Now, try and get any delegations not yet reclaimed by cobbling 2145 * to-gether an appropriate open. 2146 */ 2147 nowp = NULL; 2148 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2149 while (dp != NULL) { 2150 ndp = TAILQ_NEXT(dp, nfsdl_list); 2151 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) { 2152 if (nowp == NULL) { 2153 MALLOC(nowp, struct nfsclowner *, 2154 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK); 2155 /* 2156 * Name must be as long an largest possible 2157 * NFSV4CL_LOCKNAMELEN. 12 for now. 2158 */ 2159 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner, 2160 NFSV4CL_LOCKNAMELEN); 2161 LIST_INIT(&nowp->nfsow_open); 2162 nowp->nfsow_clp = clp; 2163 nowp->nfsow_seqid = 0; 2164 nowp->nfsow_defunct = 0; 2165 nfscl_lockinit(&nowp->nfsow_rwlock); 2166 } 2167 nop = NULL; 2168 if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) { 2169 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 2170 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 2171 nop->nfso_own = nowp; 2172 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) { 2173 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE; 2174 delegtype = NFSV4OPEN_DELEGATEWRITE; 2175 } else { 2176 nop->nfso_mode = NFSV4OPEN_ACCESSREAD; 2177 delegtype = NFSV4OPEN_DELEGATEREAD; 2178 } 2179 nop->nfso_opencnt = 0; 2180 nop->nfso_posixlock = 1; 2181 nop->nfso_fhlen = dp->nfsdl_fhlen; 2182 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen); 2183 LIST_INIT(&nop->nfso_lock); 2184 nop->nfso_stateid.seqid = 0; 2185 nop->nfso_stateid.other[0] = 0; 2186 nop->nfso_stateid.other[1] = 0; 2187 nop->nfso_stateid.other[2] = 0; 2188 newnfs_copycred(&dp->nfsdl_cred, tcred); 2189 newnfs_copyincred(tcred, &nop->nfso_cred); 2190 tdp = NULL; 2191 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh, 2192 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen, 2193 nop->nfso_mode, nop, NULL, 0, &tdp, 1, 2194 delegtype, tcred, p); 2195 if (tdp != NULL) { 2196 if ((tdp->nfsdl_flags & NFSCLDL_WRITE)) 2197 mode = NFSV4OPEN_ACCESSWRITE; 2198 else 2199 mode = NFSV4OPEN_ACCESSREAD; 2200 if ((nop->nfso_mode & mode) == mode && 2201 nop->nfso_fhlen == tdp->nfsdl_fhlen && 2202 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh, 2203 nop->nfso_fhlen)) { 2204 dp->nfsdl_stateid = tdp->nfsdl_stateid; 2205 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit; 2206 dp->nfsdl_ace = tdp->nfsdl_ace; 2207 dp->nfsdl_change = tdp->nfsdl_change; 2208 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM; 2209 if ((tdp->nfsdl_flags & NFSCLDL_RECALL)) 2210 dp->nfsdl_flags |= NFSCLDL_RECALL; 2211 FREE((caddr_t)tdp, M_NFSCLDELEG); 2212 } else { 2213 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list); 2214 } 2215 } 2216 } 2217 if (error) { 2218 if (nop != NULL) 2219 FREE((caddr_t)nop, M_NFSCLOPEN); 2220 /* 2221 * Couldn't reclaim it, so throw the state 2222 * away. Ouch!! 2223 */ 2224 nfscl_cleandeleg(dp); 2225 nfscl_freedeleg(&clp->nfsc_deleg, dp); 2226 } else { 2227 LIST_INSERT_HEAD(&extra_open, nop, nfso_list); 2228 } 2229 } 2230 dp = ndp; 2231 } 2232 2233 /* 2234 * Now, get rid of extra Opens and Delegations. 2235 */ 2236 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) { 2237 do { 2238 newnfs_copycred(&op->nfso_cred, tcred); 2239 error = nfscl_tryclose(op, tcred, nmp, p); 2240 if (error == NFSERR_GRACE) 2241 (void) nfs_catnap(PZERO, error, "nfsexcls"); 2242 } while (error == NFSERR_GRACE); 2243 LIST_REMOVE(op, nfso_list); 2244 FREE((caddr_t)op, M_NFSCLOPEN); 2245 } 2246 if (nowp != NULL) 2247 FREE((caddr_t)nowp, M_NFSCLOWNER); 2248 2249 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) { 2250 do { 2251 newnfs_copycred(&dp->nfsdl_cred, tcred); 2252 error = nfscl_trydelegreturn(dp, tcred, nmp, p); 2253 if (error == NFSERR_GRACE) 2254 (void) nfs_catnap(PZERO, error, "nfsexdlg"); 2255 } while (error == NFSERR_GRACE); 2256 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list); 2257 FREE((caddr_t)dp, M_NFSCLDELEG); 2258 } 2259 2260 /* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */ 2261 if (NFSHASNFSV4N(nmp)) 2262 (void)nfsrpc_reclaimcomplete(nmp, cred, p); 2263 2264 NFSLOCKCLSTATE(); 2265 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG; 2266 wakeup(&clp->nfsc_flags); 2267 nfsv4_unlock(&clp->nfsc_lock, 0); 2268 NFSUNLOCKCLSTATE(); 2269 NFSFREECRED(tcred); 2270 } 2271 2272 /* 2273 * This function is called when a server replies with NFSERR_EXPIRED. 2274 * It deletes all state for the client and does a fresh SetClientId/confirm. 2275 * XXX Someday it should post a signal to the process(es) that hold the 2276 * state, so they know that lock state has been lost. 2277 */ 2278 APPLESTATIC int 2279 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p) 2280 { 2281 struct nfsmount *nmp; 2282 struct ucred *cred; 2283 int igotlock = 0, error, trycnt; 2284 2285 /* 2286 * If the clientid has gone away or a new SetClientid has already 2287 * been done, just return ok. 2288 */ 2289 if (clp == NULL || clidrev != clp->nfsc_clientidrev) 2290 return (0); 2291 2292 /* 2293 * First, lock the client structure, so everyone else will 2294 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so 2295 * that only one thread does the work. 2296 */ 2297 NFSLOCKCLSTATE(); 2298 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT; 2299 do { 2300 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL, 2301 NFSCLSTATEMUTEXPTR, NULL); 2302 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT)); 2303 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) { 2304 if (igotlock) 2305 nfsv4_unlock(&clp->nfsc_lock, 0); 2306 NFSUNLOCKCLSTATE(); 2307 return (0); 2308 } 2309 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG; 2310 NFSUNLOCKCLSTATE(); 2311 2312 nmp = clp->nfsc_nmp; 2313 if (nmp == NULL) 2314 panic("nfscl expired"); 2315 cred = newnfs_getcred(); 2316 trycnt = 5; 2317 do { 2318 error = nfsrpc_setclient(nmp, clp, 0, cred, p); 2319 } while ((error == NFSERR_STALECLIENTID || 2320 error == NFSERR_BADSESSION || 2321 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0); 2322 if (error) { 2323 NFSLOCKCLSTATE(); 2324 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2325 } else { 2326 /* 2327 * Expire the state for the client. 2328 */ 2329 nfscl_expireclient(clp, nmp, cred, p); 2330 NFSLOCKCLSTATE(); 2331 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID; 2332 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2333 } 2334 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG); 2335 wakeup(&clp->nfsc_flags); 2336 nfsv4_unlock(&clp->nfsc_lock, 0); 2337 NFSUNLOCKCLSTATE(); 2338 NFSFREECRED(cred); 2339 return (error); 2340 } 2341 2342 /* 2343 * This function inserts a lock in the list after insert_lop. 2344 */ 2345 static void 2346 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop, 2347 struct nfscllock *insert_lop, int local) 2348 { 2349 2350 if ((struct nfscllockowner *)insert_lop == lp) 2351 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list); 2352 else 2353 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list); 2354 if (local) 2355 nfsstatsv1.cllocallocks++; 2356 else 2357 nfsstatsv1.cllocks++; 2358 } 2359 2360 /* 2361 * This function updates the locking for a lock owner and given file. It 2362 * maintains a list of lock ranges ordered on increasing file offset that 2363 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style). 2364 * It always adds new_lop to the list and sometimes uses the one pointed 2365 * at by other_lopp. 2366 * Returns 1 if the locks were modified, 0 otherwise. 2367 */ 2368 static int 2369 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp, 2370 struct nfscllock **other_lopp, int local) 2371 { 2372 struct nfscllock *new_lop = *new_lopp; 2373 struct nfscllock *lop, *tlop, *ilop; 2374 struct nfscllock *other_lop; 2375 int unlock = 0, modified = 0; 2376 u_int64_t tmp; 2377 2378 /* 2379 * Work down the list until the lock is merged. 2380 */ 2381 if (new_lop->nfslo_type == F_UNLCK) 2382 unlock = 1; 2383 ilop = (struct nfscllock *)lp; 2384 lop = LIST_FIRST(&lp->nfsl_lock); 2385 while (lop != NULL) { 2386 /* 2387 * Only check locks for this file that aren't before the start of 2388 * new lock's range. 2389 */ 2390 if (lop->nfslo_end >= new_lop->nfslo_first) { 2391 if (new_lop->nfslo_end < lop->nfslo_first) { 2392 /* 2393 * If the new lock ends before the start of the 2394 * current lock's range, no merge, just insert 2395 * the new lock. 2396 */ 2397 break; 2398 } 2399 if (new_lop->nfslo_type == lop->nfslo_type || 2400 (new_lop->nfslo_first <= lop->nfslo_first && 2401 new_lop->nfslo_end >= lop->nfslo_end)) { 2402 /* 2403 * This lock can be absorbed by the new lock/unlock. 2404 * This happens when it covers the entire range 2405 * of the old lock or is contiguous 2406 * with the old lock and is of the same type or an 2407 * unlock. 2408 */ 2409 if (new_lop->nfslo_type != lop->nfslo_type || 2410 new_lop->nfslo_first != lop->nfslo_first || 2411 new_lop->nfslo_end != lop->nfslo_end) 2412 modified = 1; 2413 if (lop->nfslo_first < new_lop->nfslo_first) 2414 new_lop->nfslo_first = lop->nfslo_first; 2415 if (lop->nfslo_end > new_lop->nfslo_end) 2416 new_lop->nfslo_end = lop->nfslo_end; 2417 tlop = lop; 2418 lop = LIST_NEXT(lop, nfslo_list); 2419 nfscl_freelock(tlop, local); 2420 continue; 2421 } 2422 2423 /* 2424 * All these cases are for contiguous locks that are not the 2425 * same type, so they can't be merged. 2426 */ 2427 if (new_lop->nfslo_first <= lop->nfslo_first) { 2428 /* 2429 * This case is where the new lock overlaps with the 2430 * first part of the old lock. Move the start of the 2431 * old lock to just past the end of the new lock. The 2432 * new lock will be inserted in front of the old, since 2433 * ilop hasn't been updated. (We are done now.) 2434 */ 2435 if (lop->nfslo_first != new_lop->nfslo_end) { 2436 lop->nfslo_first = new_lop->nfslo_end; 2437 modified = 1; 2438 } 2439 break; 2440 } 2441 if (new_lop->nfslo_end >= lop->nfslo_end) { 2442 /* 2443 * This case is where the new lock overlaps with the 2444 * end of the old lock's range. Move the old lock's 2445 * end to just before the new lock's first and insert 2446 * the new lock after the old lock. 2447 * Might not be done yet, since the new lock could 2448 * overlap further locks with higher ranges. 2449 */ 2450 if (lop->nfslo_end != new_lop->nfslo_first) { 2451 lop->nfslo_end = new_lop->nfslo_first; 2452 modified = 1; 2453 } 2454 ilop = lop; 2455 lop = LIST_NEXT(lop, nfslo_list); 2456 continue; 2457 } 2458 /* 2459 * The final case is where the new lock's range is in the 2460 * middle of the current lock's and splits the current lock 2461 * up. Use *other_lopp to handle the second part of the 2462 * split old lock range. (We are done now.) 2463 * For unlock, we use new_lop as other_lop and tmp, since 2464 * other_lop and new_lop are the same for this case. 2465 * We noted the unlock case above, so we don't need 2466 * new_lop->nfslo_type any longer. 2467 */ 2468 tmp = new_lop->nfslo_first; 2469 if (unlock) { 2470 other_lop = new_lop; 2471 *new_lopp = NULL; 2472 } else { 2473 other_lop = *other_lopp; 2474 *other_lopp = NULL; 2475 } 2476 other_lop->nfslo_first = new_lop->nfslo_end; 2477 other_lop->nfslo_end = lop->nfslo_end; 2478 other_lop->nfslo_type = lop->nfslo_type; 2479 lop->nfslo_end = tmp; 2480 nfscl_insertlock(lp, other_lop, lop, local); 2481 ilop = lop; 2482 modified = 1; 2483 break; 2484 } 2485 ilop = lop; 2486 lop = LIST_NEXT(lop, nfslo_list); 2487 if (lop == NULL) 2488 break; 2489 } 2490 2491 /* 2492 * Insert the new lock in the list at the appropriate place. 2493 */ 2494 if (!unlock) { 2495 nfscl_insertlock(lp, new_lop, ilop, local); 2496 *new_lopp = NULL; 2497 modified = 1; 2498 } 2499 return (modified); 2500 } 2501 2502 /* 2503 * This function must be run as a kernel thread. 2504 * It does Renew Ops and recovery, when required. 2505 */ 2506 APPLESTATIC void 2507 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p) 2508 { 2509 struct nfsclowner *owp, *nowp; 2510 struct nfsclopen *op; 2511 struct nfscllockowner *lp, *nlp; 2512 struct nfscldeleghead dh; 2513 struct nfscldeleg *dp, *ndp; 2514 struct ucred *cred; 2515 u_int32_t clidrev; 2516 int error, cbpathdown, islept, igotlock, ret, clearok; 2517 uint32_t recover_done_time = 0; 2518 time_t mytime; 2519 static time_t prevsec = 0; 2520 struct nfscllockownerfh *lfhp, *nlfhp; 2521 struct nfscllockownerfhhead lfh; 2522 struct nfscllayout *lyp, *nlyp; 2523 struct nfscldevinfo *dip, *ndip; 2524 struct nfscllayouthead rlh; 2525 struct nfsclrecalllayout *recallp; 2526 struct nfsclds *dsp; 2527 2528 cred = newnfs_getcred(); 2529 NFSLOCKCLSTATE(); 2530 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD; 2531 NFSUNLOCKCLSTATE(); 2532 for(;;) { 2533 newnfs_setroot(cred); 2534 cbpathdown = 0; 2535 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) { 2536 /* 2537 * Only allow one recover within 1/2 of the lease 2538 * duration (nfsc_renew). 2539 */ 2540 if (recover_done_time < NFSD_MONOSEC) { 2541 recover_done_time = NFSD_MONOSEC + 2542 clp->nfsc_renew; 2543 NFSCL_DEBUG(1, "Doing recovery..\n"); 2544 nfscl_recover(clp, cred, p); 2545 } else { 2546 NFSCL_DEBUG(1, "Clear Recovery dt=%u ms=%jd\n", 2547 recover_done_time, (intmax_t)NFSD_MONOSEC); 2548 NFSLOCKCLSTATE(); 2549 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER; 2550 NFSUNLOCKCLSTATE(); 2551 } 2552 } 2553 if (clp->nfsc_expire <= NFSD_MONOSEC && 2554 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) { 2555 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; 2556 clidrev = clp->nfsc_clientidrev; 2557 error = nfsrpc_renew(clp, NULL, cred, p); 2558 if (error == NFSERR_CBPATHDOWN) 2559 cbpathdown = 1; 2560 else if (error == NFSERR_STALECLIENTID || 2561 error == NFSERR_BADSESSION) { 2562 NFSLOCKCLSTATE(); 2563 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2564 NFSUNLOCKCLSTATE(); 2565 } else if (error == NFSERR_EXPIRED) 2566 (void) nfscl_hasexpired(clp, clidrev, p); 2567 } 2568 2569 checkdsrenew: 2570 if (NFSHASNFSV4N(clp->nfsc_nmp)) { 2571 /* Do renews for any DS sessions. */ 2572 NFSLOCKMNT(clp->nfsc_nmp); 2573 /* Skip first entry, since the MDS is handled above. */ 2574 dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess); 2575 if (dsp != NULL) 2576 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2577 while (dsp != NULL) { 2578 if (dsp->nfsclds_expire <= NFSD_MONOSEC && 2579 dsp->nfsclds_sess.nfsess_defunct == 0) { 2580 dsp->nfsclds_expire = NFSD_MONOSEC + 2581 clp->nfsc_renew; 2582 NFSUNLOCKMNT(clp->nfsc_nmp); 2583 (void)nfsrpc_renew(clp, dsp, cred, p); 2584 goto checkdsrenew; 2585 } 2586 dsp = TAILQ_NEXT(dsp, nfsclds_list); 2587 } 2588 NFSUNLOCKMNT(clp->nfsc_nmp); 2589 } 2590 2591 TAILQ_INIT(&dh); 2592 NFSLOCKCLSTATE(); 2593 if (cbpathdown) 2594 /* It's a Total Recall! */ 2595 nfscl_totalrecall(clp); 2596 2597 /* 2598 * Now, handle defunct owners. 2599 */ 2600 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) { 2601 if (LIST_EMPTY(&owp->nfsow_open)) { 2602 if (owp->nfsow_defunct != 0) 2603 nfscl_freeopenowner(owp, 0); 2604 } 2605 } 2606 2607 /* 2608 * Do the recall on any delegations. To avoid trouble, always 2609 * come back up here after having slept. 2610 */ 2611 igotlock = 0; 2612 tryagain: 2613 dp = TAILQ_FIRST(&clp->nfsc_deleg); 2614 while (dp != NULL) { 2615 ndp = TAILQ_NEXT(dp, nfsdl_list); 2616 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) { 2617 /* 2618 * Wait for outstanding I/O ops to be done. 2619 */ 2620 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 2621 if (igotlock) { 2622 nfsv4_unlock(&clp->nfsc_lock, 0); 2623 igotlock = 0; 2624 } 2625 dp->nfsdl_rwlock.nfslock_lock |= 2626 NFSV4LOCK_WANTED; 2627 (void) nfsmsleep(&dp->nfsdl_rwlock, 2628 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", 2629 NULL); 2630 goto tryagain; 2631 } 2632 while (!igotlock) { 2633 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 2634 &islept, NFSCLSTATEMUTEXPTR, NULL); 2635 if (islept) 2636 goto tryagain; 2637 } 2638 NFSUNLOCKCLSTATE(); 2639 newnfs_copycred(&dp->nfsdl_cred, cred); 2640 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp, 2641 NULL, cred, p, 1); 2642 if (!ret) { 2643 nfscl_cleandeleg(dp); 2644 TAILQ_REMOVE(&clp->nfsc_deleg, dp, 2645 nfsdl_list); 2646 LIST_REMOVE(dp, nfsdl_hash); 2647 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2648 nfscl_delegcnt--; 2649 nfsstatsv1.cldelegates--; 2650 } 2651 NFSLOCKCLSTATE(); 2652 } 2653 dp = ndp; 2654 } 2655 2656 /* 2657 * Clear out old delegations, if we are above the high water 2658 * mark. Only clear out ones with no state related to them. 2659 * The tailq list is in LRU order. 2660 */ 2661 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead); 2662 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) { 2663 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list); 2664 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 && 2665 dp->nfsdl_rwlock.nfslock_lock == 0 && 2666 dp->nfsdl_timestamp < NFSD_MONOSEC && 2667 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED | 2668 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) { 2669 clearok = 1; 2670 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2671 op = LIST_FIRST(&owp->nfsow_open); 2672 if (op != NULL) { 2673 clearok = 0; 2674 break; 2675 } 2676 } 2677 if (clearok) { 2678 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 2679 if (!LIST_EMPTY(&lp->nfsl_lock)) { 2680 clearok = 0; 2681 break; 2682 } 2683 } 2684 } 2685 if (clearok) { 2686 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list); 2687 LIST_REMOVE(dp, nfsdl_hash); 2688 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list); 2689 nfscl_delegcnt--; 2690 nfsstatsv1.cldelegates--; 2691 } 2692 } 2693 dp = ndp; 2694 } 2695 if (igotlock) 2696 nfsv4_unlock(&clp->nfsc_lock, 0); 2697 2698 /* 2699 * Do the recall on any layouts. To avoid trouble, always 2700 * come back up here after having slept. 2701 */ 2702 TAILQ_INIT(&rlh); 2703 tryagain2: 2704 TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) { 2705 if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) { 2706 /* 2707 * Wait for outstanding I/O ops to be done. 2708 */ 2709 if (lyp->nfsly_lock.nfslock_usecnt > 0 || 2710 (lyp->nfsly_lock.nfslock_lock & 2711 NFSV4LOCK_LOCK) != 0) { 2712 lyp->nfsly_lock.nfslock_lock |= 2713 NFSV4LOCK_WANTED; 2714 (void)nfsmsleep(&lyp->nfsly_lock, 2715 NFSCLSTATEMUTEXPTR, PZERO, "nfslyp", 2716 NULL); 2717 goto tryagain2; 2718 } 2719 /* Move the layout to the recall list. */ 2720 TAILQ_REMOVE(&clp->nfsc_layout, lyp, 2721 nfsly_list); 2722 LIST_REMOVE(lyp, nfsly_hash); 2723 TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list); 2724 2725 /* Handle any layout commits. */ 2726 if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) && 2727 (lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 2728 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 2729 NFSUNLOCKCLSTATE(); 2730 NFSCL_DEBUG(3, "do layoutcommit\n"); 2731 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, 2732 cred, p); 2733 NFSLOCKCLSTATE(); 2734 goto tryagain2; 2735 } 2736 } 2737 } 2738 2739 /* Now, look for stale layouts. */ 2740 lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead); 2741 while (lyp != NULL) { 2742 nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list); 2743 if (lyp->nfsly_timestamp < NFSD_MONOSEC && 2744 (lyp->nfsly_flags & NFSLY_RECALL) == 0 && 2745 lyp->nfsly_lock.nfslock_usecnt == 0 && 2746 lyp->nfsly_lock.nfslock_lock == 0) { 2747 NFSCL_DEBUG(4, "ret stale lay=%d\n", 2748 nfscl_layoutcnt); 2749 recallp = malloc(sizeof(*recallp), 2750 M_NFSLAYRECALL, M_NOWAIT); 2751 if (recallp == NULL) 2752 break; 2753 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, 2754 lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX, 2755 lyp->nfsly_stateid.seqid, recallp); 2756 } 2757 lyp = nlyp; 2758 } 2759 2760 /* 2761 * Free up any unreferenced device info structures. 2762 */ 2763 LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) { 2764 if (dip->nfsdi_layoutrefs == 0 && 2765 dip->nfsdi_refcnt == 0) { 2766 NFSCL_DEBUG(4, "freeing devinfo\n"); 2767 LIST_REMOVE(dip, nfsdi_list); 2768 nfscl_freedevinfo(dip); 2769 } 2770 } 2771 NFSUNLOCKCLSTATE(); 2772 2773 /* Do layout return(s), as required. */ 2774 TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) { 2775 TAILQ_REMOVE(&rlh, lyp, nfsly_list); 2776 NFSCL_DEBUG(4, "ret layout\n"); 2777 nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p); 2778 nfscl_freelayout(lyp); 2779 } 2780 2781 /* 2782 * Delegreturn any delegations cleaned out or recalled. 2783 */ 2784 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) { 2785 newnfs_copycred(&dp->nfsdl_cred, cred); 2786 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 2787 TAILQ_REMOVE(&dh, dp, nfsdl_list); 2788 FREE((caddr_t)dp, M_NFSCLDELEG); 2789 } 2790 2791 SLIST_INIT(&lfh); 2792 /* 2793 * Call nfscl_cleanupkext() once per second to check for 2794 * open/lock owners where the process has exited. 2795 */ 2796 mytime = NFSD_MONOSEC; 2797 if (prevsec != mytime) { 2798 prevsec = mytime; 2799 nfscl_cleanupkext(clp, &lfh); 2800 } 2801 2802 /* 2803 * Do a ReleaseLockOwner for all lock owners where the 2804 * associated process no longer exists, as found by 2805 * nfscl_cleanupkext(). 2806 */ 2807 newnfs_setroot(cred); 2808 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) { 2809 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list, 2810 nlp) { 2811 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp, 2812 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred, 2813 p); 2814 nfscl_freelockowner(lp, 0); 2815 } 2816 free(lfhp, M_TEMP); 2817 } 2818 SLIST_INIT(&lfh); 2819 2820 NFSLOCKCLSTATE(); 2821 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0) 2822 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl", 2823 hz); 2824 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) { 2825 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD; 2826 NFSUNLOCKCLSTATE(); 2827 NFSFREECRED(cred); 2828 wakeup((caddr_t)clp); 2829 return; 2830 } 2831 NFSUNLOCKCLSTATE(); 2832 } 2833 } 2834 2835 /* 2836 * Initiate state recovery. Called when NFSERR_STALECLIENTID, 2837 * NFSERR_STALESTATEID or NFSERR_BADSESSION is received. 2838 */ 2839 APPLESTATIC void 2840 nfscl_initiate_recovery(struct nfsclclient *clp) 2841 { 2842 2843 if (clp == NULL) 2844 return; 2845 NFSLOCKCLSTATE(); 2846 clp->nfsc_flags |= NFSCLFLAGS_RECOVER; 2847 NFSUNLOCKCLSTATE(); 2848 wakeup((caddr_t)clp); 2849 } 2850 2851 /* 2852 * Dump out the state stuff for debugging. 2853 */ 2854 APPLESTATIC void 2855 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens, 2856 int lockowner, int locks) 2857 { 2858 struct nfsclclient *clp; 2859 struct nfsclowner *owp; 2860 struct nfsclopen *op; 2861 struct nfscllockowner *lp; 2862 struct nfscllock *lop; 2863 struct nfscldeleg *dp; 2864 2865 clp = nmp->nm_clp; 2866 if (clp == NULL) { 2867 printf("nfscl dumpstate NULL clp\n"); 2868 return; 2869 } 2870 NFSLOCKCLSTATE(); 2871 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 2872 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 2873 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2874 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2875 owp->nfsow_owner[0], owp->nfsow_owner[1], 2876 owp->nfsow_owner[2], owp->nfsow_owner[3], 2877 owp->nfsow_seqid); 2878 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2879 if (opens) 2880 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2881 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2882 op->nfso_stateid.other[2], op->nfso_opencnt, 2883 op->nfso_fh[12]); 2884 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2885 if (lockowner) 2886 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2887 lp->nfsl_owner[0], lp->nfsl_owner[1], 2888 lp->nfsl_owner[2], lp->nfsl_owner[3], 2889 lp->nfsl_seqid, 2890 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2891 lp->nfsl_stateid.other[2]); 2892 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2893 if (locks) 2894 #ifdef __FreeBSD__ 2895 printf("lck typ=%d fst=%ju end=%ju\n", 2896 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2897 (intmax_t)lop->nfslo_end); 2898 #else 2899 printf("lck typ=%d fst=%qd end=%qd\n", 2900 lop->nfslo_type, lop->nfslo_first, 2901 lop->nfslo_end); 2902 #endif 2903 } 2904 } 2905 } 2906 } 2907 } 2908 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2909 if (openowner && !LIST_EMPTY(&owp->nfsow_open)) 2910 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n", 2911 owp->nfsow_owner[0], owp->nfsow_owner[1], 2912 owp->nfsow_owner[2], owp->nfsow_owner[3], 2913 owp->nfsow_seqid); 2914 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2915 if (opens) 2916 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n", 2917 op->nfso_stateid.other[0], op->nfso_stateid.other[1], 2918 op->nfso_stateid.other[2], op->nfso_opencnt, 2919 op->nfso_fh[12]); 2920 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) { 2921 if (lockowner) 2922 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n", 2923 lp->nfsl_owner[0], lp->nfsl_owner[1], 2924 lp->nfsl_owner[2], lp->nfsl_owner[3], 2925 lp->nfsl_seqid, 2926 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1], 2927 lp->nfsl_stateid.other[2]); 2928 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 2929 if (locks) 2930 #ifdef __FreeBSD__ 2931 printf("lck typ=%d fst=%ju end=%ju\n", 2932 lop->nfslo_type, (intmax_t)lop->nfslo_first, 2933 (intmax_t)lop->nfslo_end); 2934 #else 2935 printf("lck typ=%d fst=%qd end=%qd\n", 2936 lop->nfslo_type, lop->nfslo_first, 2937 lop->nfslo_end); 2938 #endif 2939 } 2940 } 2941 } 2942 } 2943 NFSUNLOCKCLSTATE(); 2944 } 2945 2946 /* 2947 * Check for duplicate open owners and opens. 2948 * (Only used as a diagnostic aid.) 2949 */ 2950 APPLESTATIC void 2951 nfscl_dupopen(vnode_t vp, int dupopens) 2952 { 2953 struct nfsclclient *clp; 2954 struct nfsclowner *owp, *owp2; 2955 struct nfsclopen *op, *op2; 2956 struct nfsfh *nfhp; 2957 2958 clp = VFSTONFS(vnode_mount(vp))->nm_clp; 2959 if (clp == NULL) { 2960 printf("nfscl dupopen NULL clp\n"); 2961 return; 2962 } 2963 nfhp = VTONFS(vp)->n_fhp; 2964 NFSLOCKCLSTATE(); 2965 2966 /* 2967 * First, search for duplicate owners. 2968 * These should never happen! 2969 */ 2970 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2971 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2972 if (owp != owp2 && 2973 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner, 2974 NFSV4CL_LOCKNAMELEN)) { 2975 NFSUNLOCKCLSTATE(); 2976 printf("DUP OWNER\n"); 2977 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0); 2978 return; 2979 } 2980 } 2981 } 2982 2983 /* 2984 * Now, search for duplicate stateids. 2985 * These shouldn't happen, either. 2986 */ 2987 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 2988 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 2989 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 2990 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 2991 if (op != op2 && 2992 (op->nfso_stateid.other[0] != 0 || 2993 op->nfso_stateid.other[1] != 0 || 2994 op->nfso_stateid.other[2] != 0) && 2995 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] && 2996 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] && 2997 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) { 2998 NFSUNLOCKCLSTATE(); 2999 printf("DUP STATEID\n"); 3000 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 3001 0); 3002 return; 3003 } 3004 } 3005 } 3006 } 3007 } 3008 3009 /* 3010 * Now search for duplicate opens. 3011 * Duplicate opens for the same owner 3012 * should never occur. Other duplicates are 3013 * possible and are checked for if "dupopens" 3014 * is true. 3015 */ 3016 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) { 3017 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) { 3018 if (nfhp->nfh_len == op2->nfso_fhlen && 3019 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) { 3020 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3021 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3022 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen && 3023 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) && 3024 (!NFSBCMP(op->nfso_own->nfsow_owner, 3025 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) || 3026 dupopens)) { 3027 if (!NFSBCMP(op->nfso_own->nfsow_owner, 3028 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3029 NFSUNLOCKCLSTATE(); 3030 printf("BADDUP OPEN\n"); 3031 } else { 3032 NFSUNLOCKCLSTATE(); 3033 printf("DUP OPEN\n"); 3034 } 3035 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 3036 0, 0); 3037 return; 3038 } 3039 } 3040 } 3041 } 3042 } 3043 } 3044 NFSUNLOCKCLSTATE(); 3045 } 3046 3047 /* 3048 * During close, find an open that needs to be dereferenced and 3049 * dereference it. If there are no more opens for this file, 3050 * log a message to that effect. 3051 * Opens aren't actually Close'd until VOP_INACTIVE() is performed 3052 * on the file's vnode. 3053 * This is the safe way, since it is difficult to identify 3054 * which open the close is for and I/O can be performed after the 3055 * close(2) system call when a file is mmap'd. 3056 * If it returns 0 for success, there will be a referenced 3057 * clp returned via clpp. 3058 */ 3059 APPLESTATIC int 3060 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp) 3061 { 3062 struct nfsclclient *clp; 3063 struct nfsclowner *owp; 3064 struct nfsclopen *op; 3065 struct nfscldeleg *dp; 3066 struct nfsfh *nfhp; 3067 int error, notdecr; 3068 3069 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3070 if (error) 3071 return (error); 3072 *clpp = clp; 3073 3074 nfhp = VTONFS(vp)->n_fhp; 3075 notdecr = 1; 3076 NFSLOCKCLSTATE(); 3077 /* 3078 * First, look for one under a delegation that was locally issued 3079 * and just decrement the opencnt for it. Since all my Opens against 3080 * the server are DENY_NONE, I don't see a problem with hanging 3081 * onto them. (It is much easier to use one of the extant Opens 3082 * that I already have on the server when a Delegation is recalled 3083 * than to do fresh Opens.) Someday, I might need to rethink this, but. 3084 */ 3085 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3086 if (dp != NULL) { 3087 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 3088 op = LIST_FIRST(&owp->nfsow_open); 3089 if (op != NULL) { 3090 /* 3091 * Since a delegation is for a file, there 3092 * should never be more than one open for 3093 * each openowner. 3094 */ 3095 if (LIST_NEXT(op, nfso_list) != NULL) 3096 panic("nfscdeleg opens"); 3097 if (notdecr && op->nfso_opencnt > 0) { 3098 notdecr = 0; 3099 op->nfso_opencnt--; 3100 break; 3101 } 3102 } 3103 } 3104 } 3105 3106 /* Now process the opens against the server. */ 3107 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3108 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3109 if (op->nfso_fhlen == nfhp->nfh_len && 3110 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3111 nfhp->nfh_len)) { 3112 /* Found an open, decrement cnt if possible */ 3113 if (notdecr && op->nfso_opencnt > 0) { 3114 notdecr = 0; 3115 op->nfso_opencnt--; 3116 } 3117 /* 3118 * There are more opens, so just return. 3119 */ 3120 if (op->nfso_opencnt > 0) { 3121 NFSUNLOCKCLSTATE(); 3122 return (0); 3123 } 3124 } 3125 } 3126 } 3127 NFSUNLOCKCLSTATE(); 3128 if (notdecr) 3129 printf("nfscl: never fnd open\n"); 3130 return (0); 3131 } 3132 3133 APPLESTATIC int 3134 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p) 3135 { 3136 struct nfsclclient *clp; 3137 struct nfsclowner *owp, *nowp; 3138 struct nfsclopen *op; 3139 struct nfscldeleg *dp; 3140 struct nfsfh *nfhp; 3141 struct nfsclrecalllayout *recallp; 3142 int error; 3143 3144 error = nfscl_getcl(vnode_mount(vp), NULL, NULL, 1, &clp); 3145 if (error) 3146 return (error); 3147 *clpp = clp; 3148 3149 nfhp = VTONFS(vp)->n_fhp; 3150 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK); 3151 NFSLOCKCLSTATE(); 3152 /* 3153 * First get rid of the local Open structures, which should be no 3154 * longer in use. 3155 */ 3156 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len); 3157 if (dp != NULL) { 3158 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) { 3159 op = LIST_FIRST(&owp->nfsow_open); 3160 if (op != NULL) { 3161 KASSERT((op->nfso_opencnt == 0), 3162 ("nfscl: bad open cnt on deleg")); 3163 nfscl_freeopen(op, 1); 3164 } 3165 nfscl_freeopenowner(owp, 1); 3166 } 3167 } 3168 3169 /* Return any layouts marked return on close. */ 3170 nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp); 3171 3172 /* Now process the opens against the server. */ 3173 lookformore: 3174 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3175 op = LIST_FIRST(&owp->nfsow_open); 3176 while (op != NULL) { 3177 if (op->nfso_fhlen == nfhp->nfh_len && 3178 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh, 3179 nfhp->nfh_len)) { 3180 /* Found an open, close it. */ 3181 KASSERT((op->nfso_opencnt == 0), 3182 ("nfscl: bad open cnt on server")); 3183 NFSUNLOCKCLSTATE(); 3184 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op, 3185 p); 3186 NFSLOCKCLSTATE(); 3187 goto lookformore; 3188 } 3189 op = LIST_NEXT(op, nfso_list); 3190 } 3191 } 3192 NFSUNLOCKCLSTATE(); 3193 /* 3194 * recallp has been set NULL by nfscl_retoncloselayout() if it was 3195 * used by the function, but calling free() with a NULL pointer is ok. 3196 */ 3197 free(recallp, M_NFSLAYRECALL); 3198 return (0); 3199 } 3200 3201 /* 3202 * Return all delegations on this client. 3203 * (Must be called with client sleep lock.) 3204 */ 3205 static void 3206 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p) 3207 { 3208 struct nfscldeleg *dp, *ndp; 3209 struct ucred *cred; 3210 3211 cred = newnfs_getcred(); 3212 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) { 3213 nfscl_cleandeleg(dp); 3214 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p); 3215 nfscl_freedeleg(&clp->nfsc_deleg, dp); 3216 } 3217 NFSFREECRED(cred); 3218 } 3219 3220 /* 3221 * Do a callback RPC. 3222 */ 3223 APPLESTATIC void 3224 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p) 3225 { 3226 int clist, gotseq_ok, i, j, k, op, rcalls; 3227 u_int32_t *tl; 3228 struct nfsclclient *clp; 3229 struct nfscldeleg *dp = NULL; 3230 int numops, taglen = -1, error = 0, trunc; 3231 u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident; 3232 u_char tag[NFSV4_SMALLSTR + 1], *tagstr; 3233 vnode_t vp = NULL; 3234 struct nfsnode *np; 3235 struct vattr va; 3236 struct nfsfh *nfhp; 3237 mount_t mp; 3238 nfsattrbit_t attrbits, rattrbits; 3239 nfsv4stateid_t stateid; 3240 uint32_t seqid, slotid = 0, highslot, cachethis; 3241 uint8_t sessionid[NFSX_V4SESSIONID]; 3242 struct mbuf *rep; 3243 struct nfscllayout *lyp; 3244 uint64_t filesid[2], len, off; 3245 int changed, gotone, laytype, recalltype; 3246 uint32_t iomode; 3247 struct nfsclrecalllayout *recallp = NULL; 3248 struct nfsclsession *tsep; 3249 3250 gotseq_ok = 0; 3251 nfsrvd_rephead(nd); 3252 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3253 taglen = fxdr_unsigned(int, *tl); 3254 if (taglen < 0) { 3255 error = EBADRPC; 3256 goto nfsmout; 3257 } 3258 if (taglen <= NFSV4_SMALLSTR) 3259 tagstr = tag; 3260 else 3261 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK); 3262 error = nfsrv_mtostr(nd, tagstr, taglen); 3263 if (error) { 3264 if (taglen > NFSV4_SMALLSTR) 3265 free(tagstr, M_TEMP); 3266 taglen = -1; 3267 goto nfsmout; 3268 } 3269 (void) nfsm_strtom(nd, tag, taglen); 3270 if (taglen > NFSV4_SMALLSTR) { 3271 free(tagstr, M_TEMP); 3272 } 3273 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED); 3274 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 3275 minorvers = fxdr_unsigned(u_int32_t, *tl++); 3276 if (minorvers != NFSV4_MINORVERSION && minorvers != NFSV41_MINORVERSION) 3277 nd->nd_repstat = NFSERR_MINORVERMISMATCH; 3278 cbident = fxdr_unsigned(u_int32_t, *tl++); 3279 if (nd->nd_repstat) 3280 numops = 0; 3281 else 3282 numops = fxdr_unsigned(int, *tl); 3283 /* 3284 * Loop around doing the sub ops. 3285 */ 3286 for (i = 0; i < numops; i++) { 3287 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3288 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED); 3289 *repp++ = *tl; 3290 op = fxdr_unsigned(int, *tl); 3291 if (op < NFSV4OP_CBGETATTR || 3292 (op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) || 3293 (op > NFSV4OP_CBNOTIFYDEVID && 3294 minorvers == NFSV41_MINORVERSION)) { 3295 nd->nd_repstat = NFSERR_OPILLEGAL; 3296 *repp = nfscl_errmap(nd, minorvers); 3297 retops++; 3298 break; 3299 } 3300 nd->nd_procnum = op; 3301 if (op < NFSV41_CBNOPS) 3302 nfsstatsv1.cbrpccnt[nd->nd_procnum]++; 3303 switch (op) { 3304 case NFSV4OP_CBGETATTR: 3305 NFSCL_DEBUG(4, "cbgetattr\n"); 3306 mp = NULL; 3307 vp = NULL; 3308 error = nfsm_getfh(nd, &nfhp); 3309 if (!error) 3310 error = nfsrv_getattrbits(nd, &attrbits, 3311 NULL, NULL); 3312 if (error == 0 && i == 0 && 3313 minorvers != NFSV4_MINORVERSION) 3314 error = NFSERR_OPNOTINSESS; 3315 if (!error) { 3316 mp = nfscl_getmnt(minorvers, sessionid, cbident, 3317 &clp); 3318 if (mp == NULL) 3319 error = NFSERR_SERVERFAULT; 3320 } 3321 if (!error) { 3322 error = nfscl_ngetreopen(mp, nfhp->nfh_fh, 3323 nfhp->nfh_len, p, &np); 3324 if (!error) 3325 vp = NFSTOV(np); 3326 } 3327 if (!error) { 3328 NFSZERO_ATTRBIT(&rattrbits); 3329 NFSLOCKCLSTATE(); 3330 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3331 nfhp->nfh_len); 3332 if (dp != NULL) { 3333 if (NFSISSET_ATTRBIT(&attrbits, 3334 NFSATTRBIT_SIZE)) { 3335 if (vp != NULL) 3336 va.va_size = np->n_size; 3337 else 3338 va.va_size = 3339 dp->nfsdl_size; 3340 NFSSETBIT_ATTRBIT(&rattrbits, 3341 NFSATTRBIT_SIZE); 3342 } 3343 if (NFSISSET_ATTRBIT(&attrbits, 3344 NFSATTRBIT_CHANGE)) { 3345 va.va_filerev = 3346 dp->nfsdl_change; 3347 if (vp == NULL || 3348 (np->n_flag & NDELEGMOD)) 3349 va.va_filerev++; 3350 NFSSETBIT_ATTRBIT(&rattrbits, 3351 NFSATTRBIT_CHANGE); 3352 } 3353 } else 3354 error = NFSERR_SERVERFAULT; 3355 NFSUNLOCKCLSTATE(); 3356 } 3357 if (vp != NULL) 3358 vrele(vp); 3359 if (mp != NULL) 3360 vfs_unbusy(mp); 3361 if (nfhp != NULL) 3362 FREE((caddr_t)nfhp, M_NFSFH); 3363 if (!error) 3364 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va, 3365 NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0, 3366 (uint64_t)0); 3367 break; 3368 case NFSV4OP_CBRECALL: 3369 NFSCL_DEBUG(4, "cbrecall\n"); 3370 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3371 NFSX_UNSIGNED); 3372 stateid.seqid = *tl++; 3373 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, 3374 NFSX_STATEIDOTHER); 3375 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3376 trunc = fxdr_unsigned(int, *tl); 3377 error = nfsm_getfh(nd, &nfhp); 3378 if (error == 0 && i == 0 && 3379 minorvers != NFSV4_MINORVERSION) 3380 error = NFSERR_OPNOTINSESS; 3381 if (!error) { 3382 NFSLOCKCLSTATE(); 3383 if (minorvers == NFSV4_MINORVERSION) 3384 clp = nfscl_getclnt(cbident); 3385 else 3386 clp = nfscl_getclntsess(sessionid); 3387 if (clp != NULL) { 3388 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, 3389 nfhp->nfh_len); 3390 if (dp != NULL && (dp->nfsdl_flags & 3391 NFSCLDL_DELEGRET) == 0) { 3392 dp->nfsdl_flags |= 3393 NFSCLDL_RECALL; 3394 wakeup((caddr_t)clp); 3395 } 3396 } else { 3397 error = NFSERR_SERVERFAULT; 3398 } 3399 NFSUNLOCKCLSTATE(); 3400 } 3401 if (nfhp != NULL) 3402 FREE((caddr_t)nfhp, M_NFSFH); 3403 break; 3404 case NFSV4OP_CBLAYOUTRECALL: 3405 NFSCL_DEBUG(4, "cblayrec\n"); 3406 nfhp = NULL; 3407 NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED); 3408 laytype = fxdr_unsigned(int, *tl++); 3409 iomode = fxdr_unsigned(uint32_t, *tl++); 3410 if (newnfs_true == *tl++) 3411 changed = 1; 3412 else 3413 changed = 0; 3414 recalltype = fxdr_unsigned(int, *tl); 3415 recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, 3416 M_WAITOK); 3417 if (laytype != NFSLAYOUT_NFSV4_1_FILES) 3418 error = NFSERR_NOMATCHLAYOUT; 3419 else if (recalltype == NFSLAYOUTRETURN_FILE) { 3420 error = nfsm_getfh(nd, &nfhp); 3421 NFSCL_DEBUG(4, "retfile getfh=%d\n", error); 3422 if (error != 0) 3423 goto nfsmout; 3424 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER + 3425 NFSX_STATEID); 3426 off = fxdr_hyper(tl); tl += 2; 3427 len = fxdr_hyper(tl); tl += 2; 3428 stateid.seqid = fxdr_unsigned(uint32_t, *tl++); 3429 NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER); 3430 if (minorvers == NFSV4_MINORVERSION) 3431 error = NFSERR_NOTSUPP; 3432 else if (i == 0) 3433 error = NFSERR_OPNOTINSESS; 3434 if (error == 0) { 3435 NFSLOCKCLSTATE(); 3436 clp = nfscl_getclntsess(sessionid); 3437 NFSCL_DEBUG(4, "cbly clp=%p\n", clp); 3438 if (clp != NULL) { 3439 lyp = nfscl_findlayout(clp, 3440 nfhp->nfh_fh, 3441 nfhp->nfh_len); 3442 NFSCL_DEBUG(4, "cblyp=%p\n", 3443 lyp); 3444 if (lyp != NULL && 3445 (lyp->nfsly_flags & 3446 NFSLY_FILES) != 0 && 3447 !NFSBCMP(stateid.other, 3448 lyp->nfsly_stateid.other, 3449 NFSX_STATEIDOTHER)) { 3450 error = 3451 nfscl_layoutrecall( 3452 recalltype, 3453 lyp, iomode, off, 3454 len, stateid.seqid, 3455 recallp); 3456 recallp = NULL; 3457 wakeup(clp); 3458 NFSCL_DEBUG(4, 3459 "aft layrcal=%d\n", 3460 error); 3461 } else 3462 error = 3463 NFSERR_NOMATCHLAYOUT; 3464 } else 3465 error = NFSERR_NOMATCHLAYOUT; 3466 NFSUNLOCKCLSTATE(); 3467 } 3468 free(nfhp, M_NFSFH); 3469 } else if (recalltype == NFSLAYOUTRETURN_FSID) { 3470 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER); 3471 filesid[0] = fxdr_hyper(tl); tl += 2; 3472 filesid[1] = fxdr_hyper(tl); tl += 2; 3473 gotone = 0; 3474 NFSLOCKCLSTATE(); 3475 clp = nfscl_getclntsess(sessionid); 3476 if (clp != NULL) { 3477 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3478 nfsly_list) { 3479 if (lyp->nfsly_filesid[0] == 3480 filesid[0] && 3481 lyp->nfsly_filesid[1] == 3482 filesid[1]) { 3483 error = 3484 nfscl_layoutrecall( 3485 recalltype, 3486 lyp, iomode, 0, 3487 UINT64_MAX, 3488 lyp->nfsly_stateid.seqid, 3489 recallp); 3490 recallp = NULL; 3491 gotone = 1; 3492 } 3493 } 3494 if (gotone != 0) 3495 wakeup(clp); 3496 else 3497 error = NFSERR_NOMATCHLAYOUT; 3498 } else 3499 error = NFSERR_NOMATCHLAYOUT; 3500 NFSUNLOCKCLSTATE(); 3501 } else if (recalltype == NFSLAYOUTRETURN_ALL) { 3502 gotone = 0; 3503 NFSLOCKCLSTATE(); 3504 clp = nfscl_getclntsess(sessionid); 3505 if (clp != NULL) { 3506 TAILQ_FOREACH(lyp, &clp->nfsc_layout, 3507 nfsly_list) { 3508 error = nfscl_layoutrecall( 3509 recalltype, lyp, iomode, 0, 3510 UINT64_MAX, 3511 lyp->nfsly_stateid.seqid, 3512 recallp); 3513 recallp = NULL; 3514 gotone = 1; 3515 } 3516 if (gotone != 0) 3517 wakeup(clp); 3518 else 3519 error = NFSERR_NOMATCHLAYOUT; 3520 } else 3521 error = NFSERR_NOMATCHLAYOUT; 3522 NFSUNLOCKCLSTATE(); 3523 } else 3524 error = NFSERR_NOMATCHLAYOUT; 3525 if (recallp != NULL) { 3526 free(recallp, M_NFSLAYRECALL); 3527 recallp = NULL; 3528 } 3529 break; 3530 case NFSV4OP_CBSEQUENCE: 3531 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3532 5 * NFSX_UNSIGNED); 3533 bcopy(tl, sessionid, NFSX_V4SESSIONID); 3534 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3535 seqid = fxdr_unsigned(uint32_t, *tl++); 3536 slotid = fxdr_unsigned(uint32_t, *tl++); 3537 highslot = fxdr_unsigned(uint32_t, *tl++); 3538 cachethis = *tl++; 3539 /* Throw away the referring call stuff. */ 3540 clist = fxdr_unsigned(int, *tl); 3541 for (j = 0; j < clist; j++) { 3542 NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 3543 NFSX_UNSIGNED); 3544 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3545 rcalls = fxdr_unsigned(int, *tl); 3546 for (k = 0; k < rcalls; k++) { 3547 NFSM_DISSECT(tl, uint32_t *, 3548 2 * NFSX_UNSIGNED); 3549 } 3550 } 3551 NFSLOCKCLSTATE(); 3552 if (i == 0) { 3553 clp = nfscl_getclntsess(sessionid); 3554 if (clp == NULL) 3555 error = NFSERR_SERVERFAULT; 3556 } else 3557 error = NFSERR_SEQUENCEPOS; 3558 if (error == 0) { 3559 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3560 error = nfsv4_seqsession(seqid, slotid, 3561 highslot, tsep->nfsess_cbslots, &rep, 3562 tsep->nfsess_backslots); 3563 } 3564 NFSUNLOCKCLSTATE(); 3565 if (error == 0 || error == NFSERR_REPLYFROMCACHE) { 3566 gotseq_ok = 1; 3567 if (rep != NULL) { 3568 /* 3569 * Handle a reply for a retried 3570 * callback. The reply will be 3571 * re-inserted in the session cache 3572 * by the nfsv4_seqsess_cacherep() call 3573 * after out: 3574 */ 3575 KASSERT(error == NFSERR_REPLYFROMCACHE, 3576 ("cbsequence: non-NULL rep")); 3577 NFSCL_DEBUG(4, "Got cbretry\n"); 3578 m_freem(nd->nd_mreq); 3579 nd->nd_mreq = rep; 3580 rep = NULL; 3581 goto out; 3582 } 3583 NFSM_BUILD(tl, uint32_t *, 3584 NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED); 3585 bcopy(sessionid, tl, NFSX_V4SESSIONID); 3586 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 3587 *tl++ = txdr_unsigned(seqid); 3588 *tl++ = txdr_unsigned(slotid); 3589 *tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1); 3590 *tl = txdr_unsigned(NFSV4_CBSLOTS - 1); 3591 } 3592 break; 3593 default: 3594 if (i == 0 && minorvers == NFSV41_MINORVERSION) 3595 error = NFSERR_OPNOTINSESS; 3596 else { 3597 NFSCL_DEBUG(1, "unsupp callback %d\n", op); 3598 error = NFSERR_NOTSUPP; 3599 } 3600 break; 3601 } 3602 if (error) { 3603 if (error == EBADRPC || error == NFSERR_BADXDR) { 3604 nd->nd_repstat = NFSERR_BADXDR; 3605 } else { 3606 nd->nd_repstat = error; 3607 } 3608 error = 0; 3609 } 3610 retops++; 3611 if (nd->nd_repstat) { 3612 *repp = nfscl_errmap(nd, minorvers); 3613 break; 3614 } else 3615 *repp = 0; /* NFS4_OK */ 3616 } 3617 nfsmout: 3618 if (recallp != NULL) 3619 free(recallp, M_NFSLAYRECALL); 3620 if (error) { 3621 if (error == EBADRPC || error == NFSERR_BADXDR) 3622 nd->nd_repstat = NFSERR_BADXDR; 3623 else 3624 printf("nfsv4 comperr1=%d\n", error); 3625 } 3626 if (taglen == -1) { 3627 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 3628 *tl++ = 0; 3629 *tl = 0; 3630 } else { 3631 *retopsp = txdr_unsigned(retops); 3632 } 3633 *nd->nd_errp = nfscl_errmap(nd, minorvers); 3634 out: 3635 if (gotseq_ok != 0) { 3636 rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK); 3637 NFSLOCKCLSTATE(); 3638 clp = nfscl_getclntsess(sessionid); 3639 if (clp != NULL) { 3640 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3641 nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots, 3642 NFSERR_OK, &rep); 3643 NFSUNLOCKCLSTATE(); 3644 } else { 3645 NFSUNLOCKCLSTATE(); 3646 m_freem(rep); 3647 } 3648 } 3649 } 3650 3651 /* 3652 * Generate the next cbident value. Basically just increment a static value 3653 * and then check that it isn't already in the list, if it has wrapped around. 3654 */ 3655 static u_int32_t 3656 nfscl_nextcbident(void) 3657 { 3658 struct nfsclclient *clp; 3659 int matched; 3660 static u_int32_t nextcbident = 0; 3661 static int haswrapped = 0; 3662 3663 nextcbident++; 3664 if (nextcbident == 0) 3665 haswrapped = 1; 3666 if (haswrapped) { 3667 /* 3668 * Search the clientid list for one already using this cbident. 3669 */ 3670 do { 3671 matched = 0; 3672 NFSLOCKCLSTATE(); 3673 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3674 if (clp->nfsc_cbident == nextcbident) { 3675 matched = 1; 3676 break; 3677 } 3678 } 3679 NFSUNLOCKCLSTATE(); 3680 if (matched == 1) 3681 nextcbident++; 3682 } while (matched); 3683 } 3684 return (nextcbident); 3685 } 3686 3687 /* 3688 * Get the mount point related to a given cbident or session and busy it. 3689 */ 3690 static mount_t 3691 nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident, 3692 struct nfsclclient **clpp) 3693 { 3694 struct nfsclclient *clp; 3695 mount_t mp; 3696 int error; 3697 struct nfsclsession *tsep; 3698 3699 *clpp = NULL; 3700 NFSLOCKCLSTATE(); 3701 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3702 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3703 if (minorvers == NFSV4_MINORVERSION) { 3704 if (clp->nfsc_cbident == cbident) 3705 break; 3706 } else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3707 NFSX_V4SESSIONID)) 3708 break; 3709 } 3710 if (clp == NULL) { 3711 NFSUNLOCKCLSTATE(); 3712 return (NULL); 3713 } 3714 mp = clp->nfsc_nmp->nm_mountp; 3715 vfs_ref(mp); 3716 NFSUNLOCKCLSTATE(); 3717 error = vfs_busy(mp, 0); 3718 vfs_rel(mp); 3719 if (error != 0) 3720 return (NULL); 3721 *clpp = clp; 3722 return (mp); 3723 } 3724 3725 /* 3726 * Get the clientid pointer related to a given cbident. 3727 */ 3728 static struct nfsclclient * 3729 nfscl_getclnt(u_int32_t cbident) 3730 { 3731 struct nfsclclient *clp; 3732 3733 LIST_FOREACH(clp, &nfsclhead, nfsc_list) 3734 if (clp->nfsc_cbident == cbident) 3735 break; 3736 return (clp); 3737 } 3738 3739 /* 3740 * Get the clientid pointer related to a given sessionid. 3741 */ 3742 static struct nfsclclient * 3743 nfscl_getclntsess(uint8_t *sessionid) 3744 { 3745 struct nfsclclient *clp; 3746 struct nfsclsession *tsep; 3747 3748 LIST_FOREACH(clp, &nfsclhead, nfsc_list) { 3749 tsep = nfsmnt_mdssession(clp->nfsc_nmp); 3750 if (!NFSBCMP(tsep->nfsess_sessionid, sessionid, 3751 NFSX_V4SESSIONID)) 3752 break; 3753 } 3754 return (clp); 3755 } 3756 3757 /* 3758 * Search for a lock conflict locally on the client. A conflict occurs if 3759 * - not same owner and overlapping byte range and at least one of them is 3760 * a write lock or this is an unlock. 3761 */ 3762 static int 3763 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen, 3764 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp, 3765 struct nfscllock **lopp) 3766 { 3767 struct nfsclowner *owp; 3768 struct nfsclopen *op; 3769 int ret; 3770 3771 if (dp != NULL) { 3772 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp); 3773 if (ret) 3774 return (ret); 3775 } 3776 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3777 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 3778 if (op->nfso_fhlen == fhlen && 3779 !NFSBCMP(op->nfso_fh, fhp, fhlen)) { 3780 ret = nfscl_checkconflict(&op->nfso_lock, nlop, 3781 own, lopp); 3782 if (ret) 3783 return (ret); 3784 } 3785 } 3786 } 3787 return (0); 3788 } 3789 3790 static int 3791 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop, 3792 u_int8_t *own, struct nfscllock **lopp) 3793 { 3794 struct nfscllockowner *lp; 3795 struct nfscllock *lop; 3796 3797 LIST_FOREACH(lp, lhp, nfsl_list) { 3798 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) { 3799 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) { 3800 if (lop->nfslo_first >= nlop->nfslo_end) 3801 break; 3802 if (lop->nfslo_end <= nlop->nfslo_first) 3803 continue; 3804 if (lop->nfslo_type == F_WRLCK || 3805 nlop->nfslo_type == F_WRLCK || 3806 nlop->nfslo_type == F_UNLCK) { 3807 if (lopp != NULL) 3808 *lopp = lop; 3809 return (NFSERR_DENIED); 3810 } 3811 } 3812 } 3813 } 3814 return (0); 3815 } 3816 3817 /* 3818 * Check for a local conflicting lock. 3819 */ 3820 APPLESTATIC int 3821 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off, 3822 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags) 3823 { 3824 struct nfscllock *lop, nlck; 3825 struct nfscldeleg *dp; 3826 struct nfsnode *np; 3827 u_int8_t own[NFSV4CL_LOCKNAMELEN]; 3828 int error; 3829 3830 nlck.nfslo_type = fl->l_type; 3831 nlck.nfslo_first = off; 3832 if (len == NFS64BITSSET) { 3833 nlck.nfslo_end = NFS64BITSSET; 3834 } else { 3835 nlck.nfslo_end = off + len; 3836 if (nlck.nfslo_end <= nlck.nfslo_first) 3837 return (NFSERR_INVAL); 3838 } 3839 np = VTONFS(vp); 3840 nfscl_filllockowner(id, own, flags); 3841 NFSLOCKCLSTATE(); 3842 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 3843 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len, 3844 &nlck, own, dp, &lop); 3845 if (error != 0) { 3846 fl->l_whence = SEEK_SET; 3847 fl->l_start = lop->nfslo_first; 3848 if (lop->nfslo_end == NFS64BITSSET) 3849 fl->l_len = 0; 3850 else 3851 fl->l_len = lop->nfslo_end - lop->nfslo_first; 3852 fl->l_pid = (pid_t)0; 3853 fl->l_type = lop->nfslo_type; 3854 error = -1; /* no RPC required */ 3855 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) || 3856 fl->l_type == F_RDLCK)) { 3857 /* 3858 * The delegation ensures that there isn't a conflicting 3859 * lock on the server, so return -1 to indicate an RPC 3860 * isn't required. 3861 */ 3862 fl->l_type = F_UNLCK; 3863 error = -1; 3864 } 3865 NFSUNLOCKCLSTATE(); 3866 return (error); 3867 } 3868 3869 /* 3870 * Handle Recall of a delegation. 3871 * The clp must be exclusive locked when this is called. 3872 */ 3873 static int 3874 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp, 3875 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p, 3876 int called_from_renewthread) 3877 { 3878 struct nfsclowner *owp, *lowp, *nowp; 3879 struct nfsclopen *op, *lop; 3880 struct nfscllockowner *lp; 3881 struct nfscllock *lckp; 3882 struct nfsnode *np; 3883 int error = 0, ret, gotvp = 0; 3884 3885 if (vp == NULL) { 3886 /* 3887 * First, get a vnode for the file. This is needed to do RPCs. 3888 */ 3889 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh, 3890 dp->nfsdl_fhlen, p, &np); 3891 if (ret) { 3892 /* 3893 * File isn't open, so nothing to move over to the 3894 * server. 3895 */ 3896 return (0); 3897 } 3898 vp = NFSTOV(np); 3899 gotvp = 1; 3900 } else { 3901 np = VTONFS(vp); 3902 } 3903 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET; 3904 3905 /* 3906 * Ok, if it's a write delegation, flush data to the server, so 3907 * that close/open consistency is retained. 3908 */ 3909 ret = 0; 3910 NFSLOCKNODE(np); 3911 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) { 3912 np->n_flag |= NDELEGRECALL; 3913 NFSUNLOCKNODE(np); 3914 ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread); 3915 NFSLOCKNODE(np); 3916 np->n_flag &= ~NDELEGRECALL; 3917 } 3918 NFSINVALATTRCACHE(np); 3919 NFSUNLOCKNODE(np); 3920 if (ret == EIO && called_from_renewthread != 0) { 3921 /* 3922 * If the flush failed with EIO for the renew thread, 3923 * return now, so that the dirty buffer will be flushed 3924 * later. 3925 */ 3926 if (gotvp != 0) 3927 vrele(vp); 3928 return (ret); 3929 } 3930 3931 /* 3932 * Now, for each openowner with opens issued locally, move them 3933 * over to state against the server. 3934 */ 3935 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) { 3936 lop = LIST_FIRST(&lowp->nfsow_open); 3937 if (lop != NULL) { 3938 if (LIST_NEXT(lop, nfso_list) != NULL) 3939 panic("nfsdlg mult opens"); 3940 /* 3941 * Look for the same openowner against the server. 3942 */ 3943 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) { 3944 if (!NFSBCMP(lowp->nfsow_owner, 3945 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) { 3946 newnfs_copycred(&dp->nfsdl_cred, cred); 3947 ret = nfscl_moveopen(vp, clp, nmp, lop, 3948 owp, dp, cred, p); 3949 if (ret == NFSERR_STALECLIENTID || 3950 ret == NFSERR_STALEDONTRECOVER || 3951 ret == NFSERR_BADSESSION) { 3952 if (gotvp) 3953 vrele(vp); 3954 return (ret); 3955 } 3956 if (ret) { 3957 nfscl_freeopen(lop, 1); 3958 if (!error) 3959 error = ret; 3960 } 3961 break; 3962 } 3963 } 3964 3965 /* 3966 * If no openowner found, create one and get an open 3967 * for it. 3968 */ 3969 if (owp == NULL) { 3970 MALLOC(nowp, struct nfsclowner *, 3971 sizeof (struct nfsclowner), M_NFSCLOWNER, 3972 M_WAITOK); 3973 nfscl_newopen(clp, NULL, &owp, &nowp, &op, 3974 NULL, lowp->nfsow_owner, dp->nfsdl_fh, 3975 dp->nfsdl_fhlen, NULL, NULL); 3976 newnfs_copycred(&dp->nfsdl_cred, cred); 3977 ret = nfscl_moveopen(vp, clp, nmp, lop, 3978 owp, dp, cred, p); 3979 if (ret) { 3980 nfscl_freeopenowner(owp, 0); 3981 if (ret == NFSERR_STALECLIENTID || 3982 ret == NFSERR_STALEDONTRECOVER || 3983 ret == NFSERR_BADSESSION) { 3984 if (gotvp) 3985 vrele(vp); 3986 return (ret); 3987 } 3988 if (ret) { 3989 nfscl_freeopen(lop, 1); 3990 if (!error) 3991 error = ret; 3992 } 3993 } 3994 } 3995 } 3996 } 3997 3998 /* 3999 * Now, get byte range locks for any locks done locally. 4000 */ 4001 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4002 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) { 4003 newnfs_copycred(&dp->nfsdl_cred, cred); 4004 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p); 4005 if (ret == NFSERR_STALESTATEID || 4006 ret == NFSERR_STALEDONTRECOVER || 4007 ret == NFSERR_STALECLIENTID || 4008 ret == NFSERR_BADSESSION) { 4009 if (gotvp) 4010 vrele(vp); 4011 return (ret); 4012 } 4013 if (ret && !error) 4014 error = ret; 4015 } 4016 } 4017 if (gotvp) 4018 vrele(vp); 4019 return (error); 4020 } 4021 4022 /* 4023 * Move a locally issued open over to an owner on the state list. 4024 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and 4025 * returns with it unlocked. 4026 */ 4027 static int 4028 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4029 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp, 4030 struct ucred *cred, NFSPROC_T *p) 4031 { 4032 struct nfsclopen *op, *nop; 4033 struct nfscldeleg *ndp; 4034 struct nfsnode *np; 4035 int error = 0, newone; 4036 4037 /* 4038 * First, look for an appropriate open, If found, just increment the 4039 * opencnt in it. 4040 */ 4041 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) { 4042 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode && 4043 op->nfso_fhlen == lop->nfso_fhlen && 4044 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) { 4045 op->nfso_opencnt += lop->nfso_opencnt; 4046 nfscl_freeopen(lop, 1); 4047 return (0); 4048 } 4049 } 4050 4051 /* No appropriate open, so we have to do one against the server. */ 4052 np = VTONFS(vp); 4053 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) + 4054 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK); 4055 newone = 0; 4056 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner, 4057 lop->nfso_fh, lop->nfso_fhlen, cred, &newone); 4058 ndp = dp; 4059 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen, 4060 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op, 4061 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p); 4062 if (error) { 4063 if (newone) 4064 nfscl_freeopen(op, 0); 4065 } else { 4066 op->nfso_mode |= lop->nfso_mode; 4067 op->nfso_opencnt += lop->nfso_opencnt; 4068 nfscl_freeopen(lop, 1); 4069 } 4070 if (nop != NULL) 4071 FREE((caddr_t)nop, M_NFSCLOPEN); 4072 if (ndp != NULL) { 4073 /* 4074 * What should I do with the returned delegation, since the 4075 * delegation is being recalled? For now, just printf and 4076 * through it away. 4077 */ 4078 printf("Moveopen returned deleg\n"); 4079 FREE((caddr_t)ndp, M_NFSCLDELEG); 4080 } 4081 return (error); 4082 } 4083 4084 /* 4085 * Recall all delegations on this client. 4086 */ 4087 static void 4088 nfscl_totalrecall(struct nfsclclient *clp) 4089 { 4090 struct nfscldeleg *dp; 4091 4092 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) { 4093 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0) 4094 dp->nfsdl_flags |= NFSCLDL_RECALL; 4095 } 4096 } 4097 4098 /* 4099 * Relock byte ranges. Called for delegation recall and state expiry. 4100 */ 4101 static int 4102 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp, 4103 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred, 4104 NFSPROC_T *p) 4105 { 4106 struct nfscllockowner *nlp; 4107 struct nfsfh *nfhp; 4108 u_int64_t off, len; 4109 u_int32_t clidrev = 0; 4110 int error, newone, donelocally; 4111 4112 off = lop->nfslo_first; 4113 len = lop->nfslo_end - lop->nfslo_first; 4114 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p, 4115 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner, 4116 lp->nfsl_openowner, &nlp, &newone, &donelocally); 4117 if (error || donelocally) 4118 return (error); 4119 if (nmp->nm_clp != NULL) 4120 clidrev = nmp->nm_clp->nfsc_clientidrev; 4121 else 4122 clidrev = 0; 4123 nfhp = VTONFS(vp)->n_fhp; 4124 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh, 4125 nfhp->nfh_len, nlp, newone, 0, off, 4126 len, lop->nfslo_type, cred, p); 4127 if (error) 4128 nfscl_freelockowner(nlp, 0); 4129 return (error); 4130 } 4131 4132 /* 4133 * Called to re-open a file. Basically get a vnode for the file handle 4134 * and then call nfsrpc_openrpc() to do the rest. 4135 */ 4136 static int 4137 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen, 4138 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp, 4139 struct ucred *cred, NFSPROC_T *p) 4140 { 4141 struct nfsnode *np; 4142 vnode_t vp; 4143 int error; 4144 4145 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np); 4146 if (error) 4147 return (error); 4148 vp = NFSTOV(np); 4149 if (np->n_v4 != NULL) { 4150 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, 4151 np->n_v4->n4_fhlen, fhp, fhlen, mode, op, 4152 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0, 4153 cred, p); 4154 } else { 4155 error = EINVAL; 4156 } 4157 vrele(vp); 4158 return (error); 4159 } 4160 4161 /* 4162 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while 4163 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials 4164 * fail. 4165 */ 4166 static int 4167 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4168 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op, 4169 u_int8_t *name, int namelen, struct nfscldeleg **ndpp, 4170 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p) 4171 { 4172 int error; 4173 4174 do { 4175 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen, 4176 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p, 4177 0, 0); 4178 if (error == NFSERR_DELAY) 4179 (void) nfs_catnap(PZERO, error, "nfstryop"); 4180 } while (error == NFSERR_DELAY); 4181 if (error == EAUTH || error == EACCES) { 4182 /* Try again using system credentials */ 4183 newnfs_setroot(cred); 4184 do { 4185 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, 4186 newfhlen, mode, op, name, namelen, ndpp, reclaim, 4187 delegtype, cred, p, 1, 0); 4188 if (error == NFSERR_DELAY) 4189 (void) nfs_catnap(PZERO, error, "nfstryop"); 4190 } while (error == NFSERR_DELAY); 4191 } 4192 return (error); 4193 } 4194 4195 /* 4196 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns 4197 * NFSERR_DELAY. Also, retry with system credentials, if the provided 4198 * cred don't work. 4199 */ 4200 static int 4201 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, 4202 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim, 4203 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p) 4204 { 4205 struct nfsrv_descript nfsd, *nd = &nfsd; 4206 int error; 4207 4208 do { 4209 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone, 4210 reclaim, off, len, type, cred, p, 0); 4211 if (!error && nd->nd_repstat == NFSERR_DELAY) 4212 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4213 "nfstrylck"); 4214 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4215 if (!error) 4216 error = nd->nd_repstat; 4217 if (error == EAUTH || error == EACCES) { 4218 /* Try again using root credentials */ 4219 newnfs_setroot(cred); 4220 do { 4221 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, 4222 newone, reclaim, off, len, type, cred, p, 1); 4223 if (!error && nd->nd_repstat == NFSERR_DELAY) 4224 (void) nfs_catnap(PZERO, (int)nd->nd_repstat, 4225 "nfstrylck"); 4226 } while (!error && nd->nd_repstat == NFSERR_DELAY); 4227 if (!error) 4228 error = nd->nd_repstat; 4229 } 4230 return (error); 4231 } 4232 4233 /* 4234 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(), 4235 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4236 * credentials fail. 4237 */ 4238 static int 4239 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred, 4240 struct nfsmount *nmp, NFSPROC_T *p) 4241 { 4242 int error; 4243 4244 do { 4245 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0); 4246 if (error == NFSERR_DELAY) 4247 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4248 } while (error == NFSERR_DELAY); 4249 if (error == EAUTH || error == EACCES) { 4250 /* Try again using system credentials */ 4251 newnfs_setroot(cred); 4252 do { 4253 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1); 4254 if (error == NFSERR_DELAY) 4255 (void) nfs_catnap(PZERO, error, "nfstrydp"); 4256 } while (error == NFSERR_DELAY); 4257 } 4258 return (error); 4259 } 4260 4261 /* 4262 * Try a close against the server. Just call nfsrpc_closerpc(), 4263 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in 4264 * credentials fail. 4265 */ 4266 APPLESTATIC int 4267 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred, 4268 struct nfsmount *nmp, NFSPROC_T *p) 4269 { 4270 struct nfsrv_descript nfsd, *nd = &nfsd; 4271 int error; 4272 4273 do { 4274 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0); 4275 if (error == NFSERR_DELAY) 4276 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4277 } while (error == NFSERR_DELAY); 4278 if (error == EAUTH || error == EACCES) { 4279 /* Try again using system credentials */ 4280 newnfs_setroot(cred); 4281 do { 4282 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1); 4283 if (error == NFSERR_DELAY) 4284 (void) nfs_catnap(PZERO, error, "nfstrycl"); 4285 } while (error == NFSERR_DELAY); 4286 } 4287 return (error); 4288 } 4289 4290 /* 4291 * Decide if a delegation on a file permits close without flushing writes 4292 * to the server. This might be a big performance win in some environments. 4293 * (Not useful until the client does caching on local stable storage.) 4294 */ 4295 APPLESTATIC int 4296 nfscl_mustflush(vnode_t vp) 4297 { 4298 struct nfsclclient *clp; 4299 struct nfscldeleg *dp; 4300 struct nfsnode *np; 4301 struct nfsmount *nmp; 4302 4303 np = VTONFS(vp); 4304 nmp = VFSTONFS(vnode_mount(vp)); 4305 if (!NFSHASNFSV4(nmp)) 4306 return (1); 4307 NFSLOCKCLSTATE(); 4308 clp = nfscl_findcl(nmp); 4309 if (clp == NULL) { 4310 NFSUNLOCKCLSTATE(); 4311 return (1); 4312 } 4313 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4314 if (dp != NULL && (dp->nfsdl_flags & 4315 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 4316 NFSCLDL_WRITE && 4317 (dp->nfsdl_sizelimit >= np->n_size || 4318 !NFSHASSTRICT3530(nmp))) { 4319 NFSUNLOCKCLSTATE(); 4320 return (0); 4321 } 4322 NFSUNLOCKCLSTATE(); 4323 return (1); 4324 } 4325 4326 /* 4327 * See if a (write) delegation exists for this file. 4328 */ 4329 APPLESTATIC int 4330 nfscl_nodeleg(vnode_t vp, int writedeleg) 4331 { 4332 struct nfsclclient *clp; 4333 struct nfscldeleg *dp; 4334 struct nfsnode *np; 4335 struct nfsmount *nmp; 4336 4337 np = VTONFS(vp); 4338 nmp = VFSTONFS(vnode_mount(vp)); 4339 if (!NFSHASNFSV4(nmp)) 4340 return (1); 4341 NFSLOCKCLSTATE(); 4342 clp = nfscl_findcl(nmp); 4343 if (clp == NULL) { 4344 NFSUNLOCKCLSTATE(); 4345 return (1); 4346 } 4347 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4348 if (dp != NULL && 4349 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 && 4350 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) == 4351 NFSCLDL_WRITE)) { 4352 NFSUNLOCKCLSTATE(); 4353 return (0); 4354 } 4355 NFSUNLOCKCLSTATE(); 4356 return (1); 4357 } 4358 4359 /* 4360 * Look for an associated delegation that should be DelegReturned. 4361 */ 4362 APPLESTATIC int 4363 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp) 4364 { 4365 struct nfsclclient *clp; 4366 struct nfscldeleg *dp; 4367 struct nfsclowner *owp; 4368 struct nfscllockowner *lp; 4369 struct nfsmount *nmp; 4370 struct ucred *cred; 4371 struct nfsnode *np; 4372 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4373 4374 nmp = VFSTONFS(vnode_mount(vp)); 4375 np = VTONFS(vp); 4376 NFSLOCKCLSTATE(); 4377 /* 4378 * Loop around waiting for: 4379 * - outstanding I/O operations on delegations to complete 4380 * - for a delegation on vp that has state, lock the client and 4381 * do a recall 4382 * - return delegation with no state 4383 */ 4384 while (1) { 4385 clp = nfscl_findcl(nmp); 4386 if (clp == NULL) { 4387 NFSUNLOCKCLSTATE(); 4388 return (retcnt); 4389 } 4390 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4391 np->n_fhp->nfh_len); 4392 if (dp != NULL) { 4393 /* 4394 * Wait for outstanding I/O ops to be done. 4395 */ 4396 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4397 if (igotlock) { 4398 nfsv4_unlock(&clp->nfsc_lock, 0); 4399 igotlock = 0; 4400 } 4401 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4402 (void) nfsmsleep(&dp->nfsdl_rwlock, 4403 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4404 continue; 4405 } 4406 needsrecall = 0; 4407 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4408 if (!LIST_EMPTY(&owp->nfsow_open)) { 4409 needsrecall = 1; 4410 break; 4411 } 4412 } 4413 if (!needsrecall) { 4414 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4415 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4416 needsrecall = 1; 4417 break; 4418 } 4419 } 4420 } 4421 if (needsrecall && !triedrecall) { 4422 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4423 islept = 0; 4424 while (!igotlock) { 4425 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4426 &islept, NFSCLSTATEMUTEXPTR, NULL); 4427 if (islept) 4428 break; 4429 } 4430 if (islept) 4431 continue; 4432 NFSUNLOCKCLSTATE(); 4433 cred = newnfs_getcred(); 4434 newnfs_copycred(&dp->nfsdl_cred, cred); 4435 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0); 4436 NFSFREECRED(cred); 4437 triedrecall = 1; 4438 NFSLOCKCLSTATE(); 4439 nfsv4_unlock(&clp->nfsc_lock, 0); 4440 igotlock = 0; 4441 continue; 4442 } 4443 *stp = dp->nfsdl_stateid; 4444 retcnt = 1; 4445 nfscl_cleandeleg(dp); 4446 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4447 } 4448 if (igotlock) 4449 nfsv4_unlock(&clp->nfsc_lock, 0); 4450 NFSUNLOCKCLSTATE(); 4451 return (retcnt); 4452 } 4453 } 4454 4455 /* 4456 * Look for associated delegation(s) that should be DelegReturned. 4457 */ 4458 APPLESTATIC int 4459 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp, 4460 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p) 4461 { 4462 struct nfsclclient *clp; 4463 struct nfscldeleg *dp; 4464 struct nfsclowner *owp; 4465 struct nfscllockowner *lp; 4466 struct nfsmount *nmp; 4467 struct ucred *cred; 4468 struct nfsnode *np; 4469 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept; 4470 4471 nmp = VFSTONFS(vnode_mount(fvp)); 4472 *gotfdp = 0; 4473 *gottdp = 0; 4474 NFSLOCKCLSTATE(); 4475 /* 4476 * Loop around waiting for: 4477 * - outstanding I/O operations on delegations to complete 4478 * - for a delegation on fvp that has state, lock the client and 4479 * do a recall 4480 * - return delegation(s) with no state. 4481 */ 4482 while (1) { 4483 clp = nfscl_findcl(nmp); 4484 if (clp == NULL) { 4485 NFSUNLOCKCLSTATE(); 4486 return (retcnt); 4487 } 4488 np = VTONFS(fvp); 4489 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4490 np->n_fhp->nfh_len); 4491 if (dp != NULL && *gotfdp == 0) { 4492 /* 4493 * Wait for outstanding I/O ops to be done. 4494 */ 4495 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4496 if (igotlock) { 4497 nfsv4_unlock(&clp->nfsc_lock, 0); 4498 igotlock = 0; 4499 } 4500 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4501 (void) nfsmsleep(&dp->nfsdl_rwlock, 4502 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4503 continue; 4504 } 4505 needsrecall = 0; 4506 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4507 if (!LIST_EMPTY(&owp->nfsow_open)) { 4508 needsrecall = 1; 4509 break; 4510 } 4511 } 4512 if (!needsrecall) { 4513 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4514 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4515 needsrecall = 1; 4516 break; 4517 } 4518 } 4519 } 4520 if (needsrecall && !triedrecall) { 4521 dp->nfsdl_flags |= NFSCLDL_DELEGRET; 4522 islept = 0; 4523 while (!igotlock) { 4524 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, 4525 &islept, NFSCLSTATEMUTEXPTR, NULL); 4526 if (islept) 4527 break; 4528 } 4529 if (islept) 4530 continue; 4531 NFSUNLOCKCLSTATE(); 4532 cred = newnfs_getcred(); 4533 newnfs_copycred(&dp->nfsdl_cred, cred); 4534 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0); 4535 NFSFREECRED(cred); 4536 triedrecall = 1; 4537 NFSLOCKCLSTATE(); 4538 nfsv4_unlock(&clp->nfsc_lock, 0); 4539 igotlock = 0; 4540 continue; 4541 } 4542 *fstp = dp->nfsdl_stateid; 4543 retcnt++; 4544 *gotfdp = 1; 4545 nfscl_cleandeleg(dp); 4546 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4547 } 4548 if (igotlock) { 4549 nfsv4_unlock(&clp->nfsc_lock, 0); 4550 igotlock = 0; 4551 } 4552 if (tvp != NULL) { 4553 np = VTONFS(tvp); 4554 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, 4555 np->n_fhp->nfh_len); 4556 if (dp != NULL && *gottdp == 0) { 4557 /* 4558 * Wait for outstanding I/O ops to be done. 4559 */ 4560 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) { 4561 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED; 4562 (void) nfsmsleep(&dp->nfsdl_rwlock, 4563 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL); 4564 continue; 4565 } 4566 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) { 4567 if (!LIST_EMPTY(&owp->nfsow_open)) { 4568 NFSUNLOCKCLSTATE(); 4569 return (retcnt); 4570 } 4571 } 4572 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) { 4573 if (!LIST_EMPTY(&lp->nfsl_lock)) { 4574 NFSUNLOCKCLSTATE(); 4575 return (retcnt); 4576 } 4577 } 4578 *tstp = dp->nfsdl_stateid; 4579 retcnt++; 4580 *gottdp = 1; 4581 nfscl_cleandeleg(dp); 4582 nfscl_freedeleg(&clp->nfsc_deleg, dp); 4583 } 4584 } 4585 NFSUNLOCKCLSTATE(); 4586 return (retcnt); 4587 } 4588 } 4589 4590 /* 4591 * Get a reference on the clientid associated with the mount point. 4592 * Return 1 if success, 0 otherwise. 4593 */ 4594 APPLESTATIC int 4595 nfscl_getref(struct nfsmount *nmp) 4596 { 4597 struct nfsclclient *clp; 4598 4599 NFSLOCKCLSTATE(); 4600 clp = nfscl_findcl(nmp); 4601 if (clp == NULL) { 4602 NFSUNLOCKCLSTATE(); 4603 return (0); 4604 } 4605 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL); 4606 NFSUNLOCKCLSTATE(); 4607 return (1); 4608 } 4609 4610 /* 4611 * Release a reference on a clientid acquired with the above call. 4612 */ 4613 APPLESTATIC void 4614 nfscl_relref(struct nfsmount *nmp) 4615 { 4616 struct nfsclclient *clp; 4617 4618 NFSLOCKCLSTATE(); 4619 clp = nfscl_findcl(nmp); 4620 if (clp == NULL) { 4621 NFSUNLOCKCLSTATE(); 4622 return; 4623 } 4624 nfsv4_relref(&clp->nfsc_lock); 4625 NFSUNLOCKCLSTATE(); 4626 } 4627 4628 /* 4629 * Save the size attribute in the delegation, since the nfsnode 4630 * is going away. 4631 */ 4632 APPLESTATIC void 4633 nfscl_reclaimnode(vnode_t vp) 4634 { 4635 struct nfsclclient *clp; 4636 struct nfscldeleg *dp; 4637 struct nfsnode *np = VTONFS(vp); 4638 struct nfsmount *nmp; 4639 4640 nmp = VFSTONFS(vnode_mount(vp)); 4641 if (!NFSHASNFSV4(nmp)) 4642 return; 4643 NFSLOCKCLSTATE(); 4644 clp = nfscl_findcl(nmp); 4645 if (clp == NULL) { 4646 NFSUNLOCKCLSTATE(); 4647 return; 4648 } 4649 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4650 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4651 dp->nfsdl_size = np->n_size; 4652 NFSUNLOCKCLSTATE(); 4653 } 4654 4655 /* 4656 * Get the saved size attribute in the delegation, since it is a 4657 * newly allocated nfsnode. 4658 */ 4659 APPLESTATIC void 4660 nfscl_newnode(vnode_t vp) 4661 { 4662 struct nfsclclient *clp; 4663 struct nfscldeleg *dp; 4664 struct nfsnode *np = VTONFS(vp); 4665 struct nfsmount *nmp; 4666 4667 nmp = VFSTONFS(vnode_mount(vp)); 4668 if (!NFSHASNFSV4(nmp)) 4669 return; 4670 NFSLOCKCLSTATE(); 4671 clp = nfscl_findcl(nmp); 4672 if (clp == NULL) { 4673 NFSUNLOCKCLSTATE(); 4674 return; 4675 } 4676 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4677 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) 4678 np->n_size = dp->nfsdl_size; 4679 NFSUNLOCKCLSTATE(); 4680 } 4681 4682 /* 4683 * If there is a valid write delegation for this file, set the modtime 4684 * to the local clock time. 4685 */ 4686 APPLESTATIC void 4687 nfscl_delegmodtime(vnode_t vp) 4688 { 4689 struct nfsclclient *clp; 4690 struct nfscldeleg *dp; 4691 struct nfsnode *np = VTONFS(vp); 4692 struct nfsmount *nmp; 4693 4694 nmp = VFSTONFS(vnode_mount(vp)); 4695 if (!NFSHASNFSV4(nmp)) 4696 return; 4697 NFSLOCKCLSTATE(); 4698 clp = nfscl_findcl(nmp); 4699 if (clp == NULL) { 4700 NFSUNLOCKCLSTATE(); 4701 return; 4702 } 4703 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4704 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) { 4705 nanotime(&dp->nfsdl_modtime); 4706 dp->nfsdl_flags |= NFSCLDL_MODTIMESET; 4707 } 4708 NFSUNLOCKCLSTATE(); 4709 } 4710 4711 /* 4712 * If there is a valid write delegation for this file with a modtime set, 4713 * put that modtime in mtime. 4714 */ 4715 APPLESTATIC void 4716 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime) 4717 { 4718 struct nfsclclient *clp; 4719 struct nfscldeleg *dp; 4720 struct nfsnode *np = VTONFS(vp); 4721 struct nfsmount *nmp; 4722 4723 nmp = VFSTONFS(vnode_mount(vp)); 4724 if (!NFSHASNFSV4(nmp)) 4725 return; 4726 NFSLOCKCLSTATE(); 4727 clp = nfscl_findcl(nmp); 4728 if (clp == NULL) { 4729 NFSUNLOCKCLSTATE(); 4730 return; 4731 } 4732 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 4733 if (dp != NULL && 4734 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) == 4735 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) 4736 *mtime = dp->nfsdl_modtime; 4737 NFSUNLOCKCLSTATE(); 4738 } 4739 4740 static int 4741 nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers) 4742 { 4743 short *defaulterrp, *errp; 4744 4745 if (!nd->nd_repstat) 4746 return (0); 4747 if (nd->nd_procnum == NFSPROC_NOOP) 4748 return (txdr_unsigned(nd->nd_repstat & 0xffff)); 4749 if (nd->nd_repstat == EBADRPC) 4750 return (txdr_unsigned(NFSERR_BADXDR)); 4751 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH || 4752 nd->nd_repstat == NFSERR_OPILLEGAL) 4753 return (txdr_unsigned(nd->nd_repstat)); 4754 if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 && 4755 minorvers > NFSV4_MINORVERSION) { 4756 /* NFSv4.n error. */ 4757 return (txdr_unsigned(nd->nd_repstat)); 4758 } 4759 if (nd->nd_procnum < NFSV4OP_CBNOPS) 4760 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum]; 4761 else 4762 return (txdr_unsigned(nd->nd_repstat)); 4763 while (*++errp) 4764 if (*errp == (short)nd->nd_repstat) 4765 return (txdr_unsigned(nd->nd_repstat)); 4766 return (txdr_unsigned(*defaulterrp)); 4767 } 4768 4769 /* 4770 * Called to find/add a layout to a client. 4771 * This function returns the layout with a refcnt (shared lock) upon 4772 * success (returns 0) or with no lock/refcnt on the layout when an 4773 * error is returned. 4774 * If a layout is passed in via lypp, it is locked (exclusively locked). 4775 */ 4776 APPLESTATIC int 4777 nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen, 4778 nfsv4stateid_t *stateidp, int retonclose, 4779 struct nfsclflayouthead *fhlp, struct nfscllayout **lypp, 4780 struct ucred *cred, NFSPROC_T *p) 4781 { 4782 struct nfsclclient *clp; 4783 struct nfscllayout *lyp, *tlyp; 4784 struct nfsclflayout *flp; 4785 struct nfsnode *np = VTONFS(vp); 4786 mount_t mp; 4787 int layout_passed_in; 4788 4789 mp = nmp->nm_mountp; 4790 layout_passed_in = 1; 4791 tlyp = NULL; 4792 lyp = *lypp; 4793 if (lyp == NULL) { 4794 layout_passed_in = 0; 4795 tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT, 4796 M_WAITOK | M_ZERO); 4797 } 4798 4799 NFSLOCKCLSTATE(); 4800 clp = nmp->nm_clp; 4801 if (clp == NULL) { 4802 if (layout_passed_in != 0) 4803 nfsv4_unlock(&lyp->nfsly_lock, 0); 4804 NFSUNLOCKCLSTATE(); 4805 if (tlyp != NULL) 4806 free(tlyp, M_NFSLAYOUT); 4807 return (EPERM); 4808 } 4809 if (lyp == NULL) { 4810 /* 4811 * Although no lyp was passed in, another thread might have 4812 * allocated one. If one is found, just increment it's ref 4813 * count and return it. 4814 */ 4815 lyp = nfscl_findlayout(clp, fhp, fhlen); 4816 if (lyp == NULL) { 4817 lyp = tlyp; 4818 tlyp = NULL; 4819 lyp->nfsly_stateid.seqid = stateidp->seqid; 4820 lyp->nfsly_stateid.other[0] = stateidp->other[0]; 4821 lyp->nfsly_stateid.other[1] = stateidp->other[1]; 4822 lyp->nfsly_stateid.other[2] = stateidp->other[2]; 4823 lyp->nfsly_lastbyte = 0; 4824 LIST_INIT(&lyp->nfsly_flayread); 4825 LIST_INIT(&lyp->nfsly_flayrw); 4826 LIST_INIT(&lyp->nfsly_recall); 4827 lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0]; 4828 lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1]; 4829 lyp->nfsly_clp = clp; 4830 lyp->nfsly_flags = (retonclose != 0) ? 4831 (NFSLY_FILES | NFSLY_RETONCLOSE) : NFSLY_FILES; 4832 lyp->nfsly_fhlen = fhlen; 4833 NFSBCOPY(fhp, lyp->nfsly_fh, fhlen); 4834 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4835 LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp, 4836 nfsly_hash); 4837 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4838 nfscl_layoutcnt++; 4839 } else { 4840 if (retonclose != 0) 4841 lyp->nfsly_flags |= NFSLY_RETONCLOSE; 4842 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4843 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4844 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4845 } 4846 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 4847 if (NFSCL_FORCEDISM(mp)) { 4848 NFSUNLOCKCLSTATE(); 4849 if (tlyp != NULL) 4850 free(tlyp, M_NFSLAYOUT); 4851 return (EPERM); 4852 } 4853 *lypp = lyp; 4854 } else 4855 lyp->nfsly_stateid.seqid = stateidp->seqid; 4856 4857 /* Merge the new list of File Layouts into the list. */ 4858 flp = LIST_FIRST(fhlp); 4859 if (flp != NULL) { 4860 if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ) 4861 nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp); 4862 else 4863 nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp); 4864 } 4865 if (layout_passed_in != 0) 4866 nfsv4_unlock(&lyp->nfsly_lock, 1); 4867 NFSUNLOCKCLSTATE(); 4868 if (tlyp != NULL) 4869 free(tlyp, M_NFSLAYOUT); 4870 return (0); 4871 } 4872 4873 /* 4874 * Search for a layout by MDS file handle. 4875 * If one is found, it is returned with a refcnt (shared lock) iff 4876 * retflpp returned non-NULL and locked (exclusive locked) iff retflpp is 4877 * returned NULL. 4878 */ 4879 struct nfscllayout * 4880 nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen, 4881 uint64_t off, struct nfsclflayout **retflpp, int *recalledp) 4882 { 4883 struct nfscllayout *lyp; 4884 mount_t mp; 4885 int error, igotlock; 4886 4887 mp = clp->nfsc_nmp->nm_mountp; 4888 *recalledp = 0; 4889 *retflpp = NULL; 4890 NFSLOCKCLSTATE(); 4891 lyp = nfscl_findlayout(clp, fhp, fhlen); 4892 if (lyp != NULL) { 4893 if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) { 4894 TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list); 4895 TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list); 4896 lyp->nfsly_timestamp = NFSD_MONOSEC + 120; 4897 error = nfscl_findlayoutforio(lyp, off, 4898 NFSV4OPEN_ACCESSREAD, retflpp); 4899 if (error == 0) 4900 nfsv4_getref(&lyp->nfsly_lock, NULL, 4901 NFSCLSTATEMUTEXPTR, mp); 4902 else { 4903 do { 4904 igotlock = nfsv4_lock(&lyp->nfsly_lock, 4905 1, NULL, NFSCLSTATEMUTEXPTR, mp); 4906 } while (igotlock == 0 && !NFSCL_FORCEDISM(mp)); 4907 *retflpp = NULL; 4908 } 4909 if (NFSCL_FORCEDISM(mp)) { 4910 lyp = NULL; 4911 *recalledp = 1; 4912 } 4913 } else { 4914 lyp = NULL; 4915 *recalledp = 1; 4916 } 4917 } 4918 NFSUNLOCKCLSTATE(); 4919 return (lyp); 4920 } 4921 4922 /* 4923 * Search for a layout by MDS file handle. If one is found, mark in to be 4924 * recalled, if it already marked "return on close". 4925 */ 4926 static void 4927 nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp, 4928 int fhlen, struct nfsclrecalllayout **recallpp) 4929 { 4930 struct nfscllayout *lyp; 4931 uint32_t iomode; 4932 4933 if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vnode_mount(vp))) || 4934 nfscl_enablecallb == 0 || nfs_numnfscbd == 0 || 4935 (VTONFS(vp)->n_flag & NNOLAYOUT) != 0) 4936 return; 4937 lyp = nfscl_findlayout(clp, fhp, fhlen); 4938 if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE | 4939 NFSLY_RECALL)) == NFSLY_RETONCLOSE) { 4940 iomode = 0; 4941 if (!LIST_EMPTY(&lyp->nfsly_flayread)) 4942 iomode |= NFSLAYOUTIOMODE_READ; 4943 if (!LIST_EMPTY(&lyp->nfsly_flayrw)) 4944 iomode |= NFSLAYOUTIOMODE_RW; 4945 (void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode, 4946 0, UINT64_MAX, lyp->nfsly_stateid.seqid, *recallpp); 4947 NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode); 4948 *recallpp = NULL; 4949 } 4950 } 4951 4952 /* 4953 * Dereference a layout. 4954 */ 4955 void 4956 nfscl_rellayout(struct nfscllayout *lyp, int exclocked) 4957 { 4958 4959 NFSLOCKCLSTATE(); 4960 if (exclocked != 0) 4961 nfsv4_unlock(&lyp->nfsly_lock, 0); 4962 else 4963 nfsv4_relref(&lyp->nfsly_lock); 4964 NFSUNLOCKCLSTATE(); 4965 } 4966 4967 /* 4968 * Search for a devinfo by deviceid. If one is found, return it after 4969 * acquiring a reference count on it. 4970 */ 4971 struct nfscldevinfo * 4972 nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid, 4973 struct nfscldevinfo *dip) 4974 { 4975 4976 NFSLOCKCLSTATE(); 4977 if (dip == NULL) 4978 dip = nfscl_finddevinfo(clp, deviceid); 4979 if (dip != NULL) 4980 dip->nfsdi_refcnt++; 4981 NFSUNLOCKCLSTATE(); 4982 return (dip); 4983 } 4984 4985 /* 4986 * Dereference a devinfo structure. 4987 */ 4988 static void 4989 nfscl_reldevinfo_locked(struct nfscldevinfo *dip) 4990 { 4991 4992 dip->nfsdi_refcnt--; 4993 if (dip->nfsdi_refcnt == 0) 4994 wakeup(&dip->nfsdi_refcnt); 4995 } 4996 4997 /* 4998 * Dereference a devinfo structure. 4999 */ 5000 void 5001 nfscl_reldevinfo(struct nfscldevinfo *dip) 5002 { 5003 5004 NFSLOCKCLSTATE(); 5005 nfscl_reldevinfo_locked(dip); 5006 NFSUNLOCKCLSTATE(); 5007 } 5008 5009 /* 5010 * Find a layout for this file handle. Return NULL upon failure. 5011 */ 5012 static struct nfscllayout * 5013 nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen) 5014 { 5015 struct nfscllayout *lyp; 5016 5017 LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash) 5018 if (lyp->nfsly_fhlen == fhlen && 5019 !NFSBCMP(lyp->nfsly_fh, fhp, fhlen)) 5020 break; 5021 return (lyp); 5022 } 5023 5024 /* 5025 * Find a devinfo for this deviceid. Return NULL upon failure. 5026 */ 5027 static struct nfscldevinfo * 5028 nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid) 5029 { 5030 struct nfscldevinfo *dip; 5031 5032 LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list) 5033 if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID) 5034 == 0) 5035 break; 5036 return (dip); 5037 } 5038 5039 /* 5040 * Merge the new file layout list into the main one, maintaining it in 5041 * increasing offset order. 5042 */ 5043 static void 5044 nfscl_mergeflayouts(struct nfsclflayouthead *fhlp, 5045 struct nfsclflayouthead *newfhlp) 5046 { 5047 struct nfsclflayout *flp, *nflp, *prevflp, *tflp; 5048 5049 flp = LIST_FIRST(fhlp); 5050 prevflp = NULL; 5051 LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) { 5052 while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) { 5053 prevflp = flp; 5054 flp = LIST_NEXT(flp, nfsfl_list); 5055 } 5056 if (prevflp == NULL) 5057 LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list); 5058 else 5059 LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list); 5060 prevflp = nflp; 5061 } 5062 } 5063 5064 /* 5065 * Add this nfscldevinfo to the client, if it doesn't already exist. 5066 * This function consumes the structure pointed at by dip, if not NULL. 5067 */ 5068 APPLESTATIC int 5069 nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, 5070 struct nfsclflayout *flp) 5071 { 5072 struct nfsclclient *clp; 5073 struct nfscldevinfo *tdip; 5074 5075 NFSLOCKCLSTATE(); 5076 clp = nmp->nm_clp; 5077 if (clp == NULL) { 5078 NFSUNLOCKCLSTATE(); 5079 if (dip != NULL) 5080 free(dip, M_NFSDEVINFO); 5081 return (ENODEV); 5082 } 5083 tdip = nfscl_finddevinfo(clp, flp->nfsfl_dev); 5084 if (tdip != NULL) { 5085 tdip->nfsdi_layoutrefs++; 5086 flp->nfsfl_devp = tdip; 5087 nfscl_reldevinfo_locked(tdip); 5088 NFSUNLOCKCLSTATE(); 5089 if (dip != NULL) 5090 free(dip, M_NFSDEVINFO); 5091 return (0); 5092 } 5093 if (dip != NULL) { 5094 LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list); 5095 dip->nfsdi_layoutrefs = 1; 5096 flp->nfsfl_devp = dip; 5097 } 5098 NFSUNLOCKCLSTATE(); 5099 if (dip == NULL) 5100 return (ENODEV); 5101 return (0); 5102 } 5103 5104 /* 5105 * Free up a layout structure and associated file layout structure(s). 5106 */ 5107 APPLESTATIC void 5108 nfscl_freelayout(struct nfscllayout *layp) 5109 { 5110 struct nfsclflayout *flp, *nflp; 5111 struct nfsclrecalllayout *rp, *nrp; 5112 5113 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) { 5114 LIST_REMOVE(flp, nfsfl_list); 5115 nfscl_freeflayout(flp); 5116 } 5117 LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) { 5118 LIST_REMOVE(flp, nfsfl_list); 5119 nfscl_freeflayout(flp); 5120 } 5121 LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) { 5122 LIST_REMOVE(rp, nfsrecly_list); 5123 free(rp, M_NFSLAYRECALL); 5124 } 5125 nfscl_layoutcnt--; 5126 free(layp, M_NFSLAYOUT); 5127 } 5128 5129 /* 5130 * Free up a file layout structure. 5131 */ 5132 APPLESTATIC void 5133 nfscl_freeflayout(struct nfsclflayout *flp) 5134 { 5135 int i; 5136 5137 for (i = 0; i < flp->nfsfl_fhcnt; i++) 5138 free(flp->nfsfl_fh[i], M_NFSFH); 5139 if (flp->nfsfl_devp != NULL) 5140 flp->nfsfl_devp->nfsdi_layoutrefs--; 5141 free(flp, M_NFSFLAYOUT); 5142 } 5143 5144 /* 5145 * Free up a file layout devinfo structure. 5146 */ 5147 APPLESTATIC void 5148 nfscl_freedevinfo(struct nfscldevinfo *dip) 5149 { 5150 5151 free(dip, M_NFSDEVINFO); 5152 } 5153 5154 /* 5155 * Mark any layouts that match as recalled. 5156 */ 5157 static int 5158 nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode, 5159 uint64_t off, uint64_t len, uint32_t stateseqid, 5160 struct nfsclrecalllayout *recallp) 5161 { 5162 struct nfsclrecalllayout *rp, *orp; 5163 5164 recallp->nfsrecly_recalltype = recalltype; 5165 recallp->nfsrecly_iomode = iomode; 5166 recallp->nfsrecly_stateseqid = stateseqid; 5167 recallp->nfsrecly_off = off; 5168 recallp->nfsrecly_len = len; 5169 /* 5170 * Order the list as file returns first, followed by fsid and any 5171 * returns, both in increasing stateseqid order. 5172 * Note that the seqids wrap around, so 1 is after 0xffffffff. 5173 * (I'm not sure this is correct because I find RFC5661 confusing 5174 * on this, but hopefully it will work ok.) 5175 */ 5176 orp = NULL; 5177 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5178 orp = rp; 5179 if ((recalltype == NFSLAYOUTRETURN_FILE && 5180 (rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE || 5181 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) || 5182 (recalltype != NFSLAYOUTRETURN_FILE && 5183 rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE && 5184 nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) { 5185 LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list); 5186 break; 5187 } 5188 } 5189 if (rp == NULL) { 5190 if (orp == NULL) 5191 LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp, 5192 nfsrecly_list); 5193 else 5194 LIST_INSERT_AFTER(orp, recallp, nfsrecly_list); 5195 } 5196 lyp->nfsly_flags |= NFSLY_RECALL; 5197 return (0); 5198 } 5199 5200 /* 5201 * Compare the two seqids for ordering. The trick is that the seqids can 5202 * wrap around from 0xffffffff->0, so check for the cases where one 5203 * has wrapped around. 5204 * Return 1 if seqid1 comes before seqid2, 0 otherwise. 5205 */ 5206 static int 5207 nfscl_seq(uint32_t seqid1, uint32_t seqid2) 5208 { 5209 5210 if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff) 5211 /* seqid2 has wrapped around. */ 5212 return (0); 5213 if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff) 5214 /* seqid1 has wrapped around. */ 5215 return (1); 5216 if (seqid1 <= seqid2) 5217 return (1); 5218 return (0); 5219 } 5220 5221 /* 5222 * Do a layout return for each of the recalls. 5223 */ 5224 static void 5225 nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp, 5226 struct ucred *cred, NFSPROC_T *p) 5227 { 5228 struct nfsclrecalllayout *rp; 5229 nfsv4stateid_t stateid; 5230 5231 NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER); 5232 stateid.seqid = lyp->nfsly_stateid.seqid; 5233 LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) { 5234 (void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh, 5235 lyp->nfsly_fhlen, 0, NFSLAYOUT_NFSV4_1_FILES, 5236 rp->nfsrecly_iomode, rp->nfsrecly_recalltype, 5237 rp->nfsrecly_off, rp->nfsrecly_len, 5238 &stateid, 0, NULL, cred, p, NULL); 5239 } 5240 } 5241 5242 /* 5243 * Do the layout commit for a file layout. 5244 */ 5245 static void 5246 nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp, 5247 struct ucred *cred, NFSPROC_T *p) 5248 { 5249 struct nfsclflayout *flp; 5250 uint64_t len; 5251 int error; 5252 5253 LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) { 5254 if (flp->nfsfl_off <= lyp->nfsly_lastbyte) { 5255 len = flp->nfsfl_end - flp->nfsfl_off; 5256 error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh, 5257 lyp->nfsly_fhlen, 0, flp->nfsfl_off, len, 5258 lyp->nfsly_lastbyte, &lyp->nfsly_stateid, 5259 NFSLAYOUT_NFSV4_1_FILES, 0, NULL, cred, p, NULL); 5260 NFSCL_DEBUG(4, "layoutcommit err=%d\n", error); 5261 if (error == NFSERR_NOTSUPP) { 5262 /* If not supported, don't bother doing it. */ 5263 NFSLOCKMNT(nmp); 5264 nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT; 5265 NFSUNLOCKMNT(nmp); 5266 break; 5267 } 5268 } 5269 } 5270 } 5271 5272 /* 5273 * Commit all layouts for a file (vnode). 5274 */ 5275 int 5276 nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p) 5277 { 5278 struct nfsclclient *clp; 5279 struct nfscllayout *lyp; 5280 struct nfsnode *np = VTONFS(vp); 5281 mount_t mp; 5282 struct nfsmount *nmp; 5283 5284 mp = vnode_mount(vp); 5285 nmp = VFSTONFS(mp); 5286 if (NFSHASNOLAYOUTCOMMIT(nmp)) 5287 return (0); 5288 NFSLOCKCLSTATE(); 5289 clp = nmp->nm_clp; 5290 if (clp == NULL) { 5291 NFSUNLOCKCLSTATE(); 5292 return (EPERM); 5293 } 5294 lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len); 5295 if (lyp == NULL) { 5296 NFSUNLOCKCLSTATE(); 5297 return (EPERM); 5298 } 5299 nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp); 5300 if (NFSCL_FORCEDISM(mp)) { 5301 NFSUNLOCKCLSTATE(); 5302 return (EPERM); 5303 } 5304 tryagain: 5305 if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) { 5306 lyp->nfsly_flags &= ~NFSLY_WRITTEN; 5307 NFSUNLOCKCLSTATE(); 5308 NFSCL_DEBUG(4, "do layoutcommit2\n"); 5309 nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p); 5310 NFSLOCKCLSTATE(); 5311 goto tryagain; 5312 } 5313 nfsv4_relref(&lyp->nfsly_lock); 5314 NFSUNLOCKCLSTATE(); 5315 return (0); 5316 } 5317 5318