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