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 #ifndef APPLEKEXT 32 #include <fs/nfs/nfsport.h> 33 34 struct nfsrv_stablefirst nfsrv_stablefirst; 35 int nfsrv_issuedelegs = 0; 36 int nfsrv_dolocallocks = 0; 37 struct nfsv4lock nfsv4rootfs_lock; 38 39 extern int newnfs_numnfsd; 40 extern struct nfsstats newnfsstats; 41 extern int nfsrv_lease; 42 extern struct timeval nfsboottime; 43 extern u_int32_t newnfs_true, newnfs_false; 44 NFSV4ROOTLOCKMUTEX; 45 NFSSTATESPINLOCK; 46 47 /* 48 * Hash lists for nfs V4. 49 * (Some would put them in the .h file, but I don't like declaring storage 50 * in a .h) 51 */ 52 struct nfsclienthashhead nfsclienthash[NFSCLIENTHASHSIZE]; 53 struct nfslockhashhead nfslockhash[NFSLOCKHASHSIZE]; 54 #endif /* !APPLEKEXT */ 55 56 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 57 static time_t nfsrvboottime; 58 static int nfsrv_writedelegifpos = 1; 59 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 60 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 61 static int nfsrv_nogsscallback = 0; 62 63 /* local functions */ 64 static void nfsrv_dumpaclient(struct nfsclient *clp, 65 struct nfsd_dumpclients *dumpp); 66 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 67 NFSPROC_T *p); 68 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 69 NFSPROC_T *p); 70 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 71 NFSPROC_T *p); 72 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 73 int cansleep, NFSPROC_T *p); 74 static void nfsrv_freenfslock(struct nfslock *lop); 75 static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 76 static void nfsrv_freedeleg(struct nfsstate *); 77 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 78 u_int32_t flags, struct nfsstate **stpp); 79 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 80 struct nfsstate **stpp); 81 static int nfsrv_getlockfh(vnode_t vp, u_short flags, 82 struct nfslockfile **new_lfpp, fhandle_t *nfhp, NFSPROC_T *p); 83 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 84 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 85 static void nfsrv_insertlock(struct nfslock *new_lop, 86 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 87 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 88 struct nfslock **other_lopp, struct nfslockfile *lfp); 89 static int nfsrv_getipnumber(u_char *cp); 90 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 91 nfsv4stateid_t *stateidp, int specialid); 92 static int nfsrv_checkgrace(u_int32_t flags); 93 static int nfsrv_docallback(struct nfsclient *clp, int procnum, 94 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 95 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p); 96 static u_int32_t nfsrv_nextclientindex(void); 97 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 98 static void nfsrv_markstable(struct nfsclient *clp); 99 static int nfsrv_checkstable(struct nfsclient *clp); 100 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 101 vnode *vp, NFSPROC_T *p); 102 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 103 NFSPROC_T *p, vnode_t vp); 104 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 105 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 106 static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 107 struct nfsclient *clp); 108 static time_t nfsrv_leaseexpiry(void); 109 static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 110 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 111 struct nfsstate *stp, struct nfsrvcache *op); 112 static int nfsrv_nootherstate(struct nfsstate *stp); 113 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 114 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 115 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 116 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 117 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 118 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 119 NFSPROC_T *p); 120 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 121 NFSPROC_T *p); 122 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 123 uint64_t first, uint64_t end); 124 static void nfsrv_locklf(struct nfslockfile *lfp); 125 static void nfsrv_unlocklf(struct nfslockfile *lfp); 126 127 /* 128 * Scan the client list for a match and either return the current one, 129 * create a new entry or return an error. 130 * If returning a non-error, the clp structure must either be linked into 131 * the client list or free'd. 132 */ 133 APPLESTATIC int 134 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 135 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 136 { 137 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 138 int i; 139 struct nfsstate *stp, *tstp; 140 struct sockaddr_in *sad, *rad; 141 int zapit = 0, gotit, hasstate = 0, igotlock; 142 static u_int64_t confirm_index = 0; 143 144 /* 145 * Check for state resource limit exceeded. 146 */ 147 if (nfsrv_openpluslock > NFSRV_V4STATELIMIT) 148 return (NFSERR_RESOURCE); 149 150 if ((nd->nd_flag & ND_GSS) && nfsrv_nogsscallback) 151 /* 152 * Don't do callbacks for AUTH_GSS. 153 * (Since these aren't yet debugged, they might cause the 154 * server to crap out, if they get past the Init call to 155 * the client.) 156 */ 157 new_clp->lc_program = 0; 158 159 /* Lock out other nfsd threads */ 160 NFSLOCKV4ROOTMUTEX(); 161 nfsv4_relref(&nfsv4rootfs_lock); 162 do { 163 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 164 NFSV4ROOTLOCKMUTEXPTR); 165 } while (!igotlock); 166 NFSUNLOCKV4ROOTMUTEX(); 167 168 /* 169 * Search for a match in the client list. 170 */ 171 gotit = i = 0; 172 while (i < NFSCLIENTHASHSIZE && !gotit) { 173 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 174 if (new_clp->lc_idlen == clp->lc_idlen && 175 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 176 gotit = 1; 177 break; 178 } 179 } 180 i++; 181 } 182 if (!gotit || 183 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 184 /* 185 * Get rid of the old one. 186 */ 187 if (i != NFSCLIENTHASHSIZE) { 188 LIST_REMOVE(clp, lc_hash); 189 nfsrv_cleanclient(clp, p); 190 nfsrv_freedeleglist(&clp->lc_deleg); 191 nfsrv_freedeleglist(&clp->lc_olddeleg); 192 zapit = 1; 193 } 194 /* 195 * Add it after assigning a client id to it. 196 */ 197 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 198 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 199 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 200 (u_int32_t)nfsrvboottime; 201 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 202 nfsrv_nextclientindex(); 203 new_clp->lc_stateindex = 0; 204 new_clp->lc_statemaxindex = 0; 205 new_clp->lc_cbref = 0; 206 new_clp->lc_expiry = nfsrv_leaseexpiry(); 207 LIST_INIT(&new_clp->lc_open); 208 LIST_INIT(&new_clp->lc_deleg); 209 LIST_INIT(&new_clp->lc_olddeleg); 210 for (i = 0; i < NFSSTATEHASHSIZE; i++) 211 LIST_INIT(&new_clp->lc_stateid[i]); 212 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 213 lc_hash); 214 newnfsstats.srvclients++; 215 nfsrv_openpluslock++; 216 nfsrv_clients++; 217 NFSLOCKV4ROOTMUTEX(); 218 nfsv4_unlock(&nfsv4rootfs_lock, 1); 219 NFSUNLOCKV4ROOTMUTEX(); 220 if (zapit) 221 nfsrv_zapclient(clp, p); 222 *new_clpp = NULL; 223 return (0); 224 } 225 226 /* 227 * Now, handle the cases where the id is already issued. 228 */ 229 if (nfsrv_notsamecredname(nd, clp)) { 230 /* 231 * Check to see if there is expired state that should go away. 232 */ 233 if (clp->lc_expiry < NFSD_MONOSEC && 234 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 235 nfsrv_cleanclient(clp, p); 236 nfsrv_freedeleglist(&clp->lc_deleg); 237 } 238 239 /* 240 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 241 * RFC3530 Sec. 8.1.2 last para. 242 */ 243 if (!LIST_EMPTY(&clp->lc_deleg)) { 244 hasstate = 1; 245 } else if (LIST_EMPTY(&clp->lc_open)) { 246 hasstate = 0; 247 } else { 248 hasstate = 0; 249 /* Look for an Open on the OpenOwner */ 250 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 251 if (!LIST_EMPTY(&stp->ls_open)) { 252 hasstate = 1; 253 break; 254 } 255 } 256 } 257 if (hasstate) { 258 /* 259 * If the uid doesn't match, return NFSERR_CLIDINUSE after 260 * filling out the correct ipaddr and portnum. 261 */ 262 sad = NFSSOCKADDR(new_clp->lc_req.nr_nam, struct sockaddr_in *); 263 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 264 sad->sin_addr.s_addr = rad->sin_addr.s_addr; 265 sad->sin_port = rad->sin_port; 266 NFSLOCKV4ROOTMUTEX(); 267 nfsv4_unlock(&nfsv4rootfs_lock, 1); 268 NFSUNLOCKV4ROOTMUTEX(); 269 return (NFSERR_CLIDINUSE); 270 } 271 } 272 273 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 274 /* 275 * If the verifier has changed, the client has rebooted 276 * and a new client id is issued. The old state info 277 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 278 */ 279 LIST_REMOVE(clp, lc_hash); 280 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 281 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 282 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 283 nfsrvboottime; 284 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 285 nfsrv_nextclientindex(); 286 new_clp->lc_stateindex = 0; 287 new_clp->lc_statemaxindex = 0; 288 new_clp->lc_cbref = 0; 289 new_clp->lc_expiry = nfsrv_leaseexpiry(); 290 291 /* 292 * Save the state until confirmed. 293 */ 294 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 295 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 296 tstp->ls_clp = new_clp; 297 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 298 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 299 tstp->ls_clp = new_clp; 300 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 301 ls_list); 302 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 303 tstp->ls_clp = new_clp; 304 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 305 LIST_NEWHEAD(&new_clp->lc_stateid[i], 306 &clp->lc_stateid[i], ls_hash); 307 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_list) 308 tstp->ls_clp = new_clp; 309 } 310 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 311 lc_hash); 312 newnfsstats.srvclients++; 313 nfsrv_openpluslock++; 314 nfsrv_clients++; 315 NFSLOCKV4ROOTMUTEX(); 316 nfsv4_unlock(&nfsv4rootfs_lock, 1); 317 NFSUNLOCKV4ROOTMUTEX(); 318 319 /* 320 * Must wait until any outstanding callback on the old clp 321 * completes. 322 */ 323 while (clp->lc_cbref) { 324 clp->lc_flags |= LCL_WAKEUPWANTED; 325 (void) tsleep((caddr_t)clp, PZERO - 1, 326 "nfsd clp", 10 * hz); 327 } 328 nfsrv_zapclient(clp, p); 329 *new_clpp = NULL; 330 return (0); 331 } 332 /* 333 * id and verifier match, so update the net address info 334 * and get rid of any existing callback authentication 335 * handle, so a new one will be acquired. 336 */ 337 LIST_REMOVE(clp, lc_hash); 338 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 339 new_clp->lc_expiry = nfsrv_leaseexpiry(); 340 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 341 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 342 clp->lc_clientid.lval[0]; 343 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 344 clp->lc_clientid.lval[1]; 345 new_clp->lc_delegtime = clp->lc_delegtime; 346 new_clp->lc_stateindex = clp->lc_stateindex; 347 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 348 new_clp->lc_cbref = 0; 349 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 350 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 351 tstp->ls_clp = new_clp; 352 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 353 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 354 tstp->ls_clp = new_clp; 355 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 356 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 357 tstp->ls_clp = new_clp; 358 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 359 LIST_NEWHEAD(&new_clp->lc_stateid[i], &clp->lc_stateid[i], 360 ls_hash); 361 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_list) 362 tstp->ls_clp = new_clp; 363 } 364 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 365 lc_hash); 366 newnfsstats.srvclients++; 367 nfsrv_openpluslock++; 368 nfsrv_clients++; 369 NFSLOCKV4ROOTMUTEX(); 370 nfsv4_unlock(&nfsv4rootfs_lock, 1); 371 NFSUNLOCKV4ROOTMUTEX(); 372 373 /* 374 * Must wait until any outstanding callback on the old clp 375 * completes. 376 */ 377 while (clp->lc_cbref) { 378 clp->lc_flags |= LCL_WAKEUPWANTED; 379 (void) tsleep((caddr_t)clp, PZERO - 1, "nfsd clp", 10 * hz); 380 } 381 nfsrv_zapclient(clp, p); 382 *new_clpp = NULL; 383 return (0); 384 } 385 386 /* 387 * Check to see if the client id exists and optionally confirm it. 388 */ 389 APPLESTATIC int 390 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 391 nfsquad_t confirm, struct nfsrv_descript *nd, NFSPROC_T *p) 392 { 393 struct nfsclient *clp; 394 struct nfsstate *stp; 395 int i; 396 struct nfsclienthashhead *hp; 397 int error = 0, igotlock, doneok; 398 399 if (clpp) 400 *clpp = NULL; 401 if (nfsrvboottime != clientid.lval[0]) 402 return (NFSERR_STALECLIENTID); 403 404 /* 405 * If called with opflags == CLOPS_RENEW, the State Lock is 406 * already held. Otherwise, we need to get either that or, 407 * for the case of Confirm, lock out the nfsd threads. 408 */ 409 if (opflags & CLOPS_CONFIRM) { 410 NFSLOCKV4ROOTMUTEX(); 411 nfsv4_relref(&nfsv4rootfs_lock); 412 do { 413 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 414 NFSV4ROOTLOCKMUTEXPTR); 415 } while (!igotlock); 416 NFSUNLOCKV4ROOTMUTEX(); 417 } else if (opflags != CLOPS_RENEW) { 418 NFSLOCKSTATE(); 419 } 420 421 hp = NFSCLIENTHASH(clientid); 422 LIST_FOREACH(clp, hp, lc_hash) { 423 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 424 break; 425 } 426 if (clp == LIST_END(hp)) { 427 if (opflags & CLOPS_CONFIRM) 428 error = NFSERR_STALECLIENTID; 429 else 430 error = NFSERR_EXPIRED; 431 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 432 /* 433 * If marked admin revoked, just return the error. 434 */ 435 error = NFSERR_ADMINREVOKED; 436 } 437 if (error) { 438 if (opflags & CLOPS_CONFIRM) { 439 NFSLOCKV4ROOTMUTEX(); 440 nfsv4_unlock(&nfsv4rootfs_lock, 1); 441 NFSUNLOCKV4ROOTMUTEX(); 442 } else if (opflags != CLOPS_RENEW) { 443 NFSUNLOCKSTATE(); 444 } 445 return (error); 446 } 447 448 /* 449 * Perform any operations specified by the opflags. 450 */ 451 if (opflags & CLOPS_CONFIRM) { 452 if (clp->lc_confirm.qval != confirm.qval) 453 error = NFSERR_STALECLIENTID; 454 else if (nfsrv_notsamecredname(nd, clp)) 455 error = NFSERR_CLIDINUSE; 456 457 if (!error) { 458 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 459 LCL_NEEDSCONFIRM) { 460 /* 461 * Hang onto the delegations (as old delegations) 462 * for an Open with CLAIM_DELEGATE_PREV unless in 463 * grace, but get rid of the rest of the state. 464 */ 465 nfsrv_cleanclient(clp, p); 466 nfsrv_freedeleglist(&clp->lc_olddeleg); 467 if (nfsrv_checkgrace(0)) { 468 /* In grace, so just delete delegations */ 469 nfsrv_freedeleglist(&clp->lc_deleg); 470 } else { 471 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 472 stp->ls_flags |= NFSLCK_OLDDELEG; 473 clp->lc_delegtime = NFSD_MONOSEC + 474 nfsrv_lease + NFSRV_LEASEDELTA; 475 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 476 ls_list); 477 } 478 } 479 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 480 if (clp->lc_program) 481 clp->lc_flags |= LCL_NEEDSCBNULL; 482 } 483 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 484 error = NFSERR_EXPIRED; 485 } 486 487 /* 488 * If called by the Renew Op, we must check the principal. 489 */ 490 if (!error && (opflags & CLOPS_RENEWOP)) { 491 if (nfsrv_notsamecredname(nd, clp)) { 492 doneok = 0; 493 for (i = 0; i < NFSSTATEHASHSIZE && doneok == 0; i++) { 494 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 495 if ((stp->ls_flags & NFSLCK_OPEN) && 496 stp->ls_uid == nd->nd_cred->cr_uid) { 497 doneok = 1; 498 break; 499 } 500 } 501 } 502 if (!doneok) 503 error = NFSERR_ACCES; 504 } 505 if (!error && (clp->lc_flags & LCL_CBDOWN)) 506 error = NFSERR_CBPATHDOWN; 507 } 508 if ((!error || error == NFSERR_CBPATHDOWN) && 509 (opflags & CLOPS_RENEW)) { 510 clp->lc_expiry = nfsrv_leaseexpiry(); 511 } 512 if (opflags & CLOPS_CONFIRM) { 513 NFSLOCKV4ROOTMUTEX(); 514 nfsv4_unlock(&nfsv4rootfs_lock, 1); 515 NFSUNLOCKV4ROOTMUTEX(); 516 } else if (opflags != CLOPS_RENEW) { 517 NFSUNLOCKSTATE(); 518 } 519 if (clpp) 520 *clpp = clp; 521 return (error); 522 } 523 524 /* 525 * Called from the new nfssvc syscall to admin revoke a clientid. 526 * Returns 0 for success, error otherwise. 527 */ 528 APPLESTATIC int 529 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 530 { 531 struct nfsclient *clp = NULL; 532 int i; 533 int gotit, igotlock; 534 535 /* 536 * First, lock out the nfsd so that state won't change while the 537 * revocation record is being written to the stable storage restart 538 * file. 539 */ 540 NFSLOCKV4ROOTMUTEX(); 541 do { 542 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 543 NFSV4ROOTLOCKMUTEXPTR); 544 } while (!igotlock); 545 NFSUNLOCKV4ROOTMUTEX(); 546 547 /* 548 * Search for a match in the client list. 549 */ 550 gotit = i = 0; 551 while (i < NFSCLIENTHASHSIZE && !gotit) { 552 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 553 if (revokep->nclid_idlen == clp->lc_idlen && 554 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 555 gotit = 1; 556 break; 557 } 558 } 559 i++; 560 } 561 if (!gotit) { 562 NFSLOCKV4ROOTMUTEX(); 563 nfsv4_unlock(&nfsv4rootfs_lock, 0); 564 NFSUNLOCKV4ROOTMUTEX(); 565 return (EPERM); 566 } 567 568 /* 569 * Now, write out the revocation record 570 */ 571 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 572 573 /* 574 * and clear out the state, marking the clientid revoked. 575 */ 576 clp->lc_flags &= ~LCL_CALLBACKSON; 577 clp->lc_flags |= LCL_ADMINREVOKED; 578 nfsrv_cleanclient(clp, p); 579 nfsrv_freedeleglist(&clp->lc_deleg); 580 nfsrv_freedeleglist(&clp->lc_olddeleg); 581 NFSLOCKV4ROOTMUTEX(); 582 nfsv4_unlock(&nfsv4rootfs_lock, 0); 583 NFSUNLOCKV4ROOTMUTEX(); 584 return (0); 585 } 586 587 /* 588 * Dump out stats for all clients. Called from nfssvc(2), that is used 589 * newnfsstats. 590 */ 591 APPLESTATIC void 592 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 593 { 594 struct nfsclient *clp; 595 int i = 0, cnt = 0; 596 597 /* 598 * First, get a reference on the nfsv4rootfs_lock so that an 599 * exclusive lock cannot be acquired while dumping the clients. 600 */ 601 NFSLOCKV4ROOTMUTEX(); 602 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR); 603 NFSUNLOCKV4ROOTMUTEX(); 604 NFSLOCKSTATE(); 605 /* 606 * Rattle through the client lists until done. 607 */ 608 while (i < NFSCLIENTHASHSIZE && cnt < maxcnt) { 609 clp = LIST_FIRST(&nfsclienthash[i]); 610 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 611 nfsrv_dumpaclient(clp, &dumpp[cnt]); 612 cnt++; 613 clp = LIST_NEXT(clp, lc_hash); 614 } 615 i++; 616 } 617 if (cnt < maxcnt) 618 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 619 NFSUNLOCKSTATE(); 620 NFSLOCKV4ROOTMUTEX(); 621 nfsv4_relref(&nfsv4rootfs_lock); 622 NFSUNLOCKV4ROOTMUTEX(); 623 } 624 625 /* 626 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 627 */ 628 static void 629 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 630 { 631 struct nfsstate *stp, *openstp, *lckownstp; 632 struct nfslock *lop; 633 struct sockaddr *sad; 634 struct sockaddr_in *rad; 635 struct sockaddr_in6 *rad6; 636 637 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 638 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 639 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 640 dumpp->ndcl_flags = clp->lc_flags; 641 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 642 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 643 sad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr *); 644 dumpp->ndcl_addrfam = sad->sa_family; 645 if (sad->sa_family == AF_INET) { 646 rad = (struct sockaddr_in *)sad; 647 dumpp->ndcl_cbaddr.sin_addr = rad->sin_addr; 648 } else { 649 rad6 = (struct sockaddr_in6 *)sad; 650 dumpp->ndcl_cbaddr.sin6_addr = rad6->sin6_addr; 651 } 652 653 /* 654 * Now, scan the state lists and total up the opens and locks. 655 */ 656 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 657 dumpp->ndcl_nopenowners++; 658 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 659 dumpp->ndcl_nopens++; 660 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 661 dumpp->ndcl_nlockowners++; 662 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 663 dumpp->ndcl_nlocks++; 664 } 665 } 666 } 667 } 668 669 /* 670 * and the delegation lists. 671 */ 672 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 673 dumpp->ndcl_ndelegs++; 674 } 675 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 676 dumpp->ndcl_nolddelegs++; 677 } 678 } 679 680 /* 681 * Dump out lock stats for a file. 682 */ 683 APPLESTATIC void 684 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 685 NFSPROC_T *p) 686 { 687 struct nfsstate *stp; 688 struct nfslock *lop; 689 int cnt = 0; 690 struct nfslockfile *lfp; 691 struct sockaddr *sad; 692 struct sockaddr_in *rad; 693 struct sockaddr_in6 *rad6; 694 int ret; 695 fhandle_t nfh; 696 697 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 698 /* 699 * First, get a reference on the nfsv4rootfs_lock so that an 700 * exclusive lock on it cannot be acquired while dumping the locks. 701 */ 702 NFSLOCKV4ROOTMUTEX(); 703 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR); 704 NFSUNLOCKV4ROOTMUTEX(); 705 NFSLOCKSTATE(); 706 if (!ret) 707 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 708 if (ret) { 709 ldumpp[0].ndlck_clid.nclid_idlen = 0; 710 NFSUNLOCKSTATE(); 711 NFSLOCKV4ROOTMUTEX(); 712 nfsv4_relref(&nfsv4rootfs_lock); 713 NFSUNLOCKV4ROOTMUTEX(); 714 return; 715 } 716 717 /* 718 * For each open share on file, dump it out. 719 */ 720 stp = LIST_FIRST(&lfp->lf_open); 721 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 722 ldumpp[cnt].ndlck_flags = stp->ls_flags; 723 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 724 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 725 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 726 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 727 ldumpp[cnt].ndlck_owner.nclid_idlen = 728 stp->ls_openowner->ls_ownerlen; 729 NFSBCOPY(stp->ls_openowner->ls_owner, 730 ldumpp[cnt].ndlck_owner.nclid_id, 731 stp->ls_openowner->ls_ownerlen); 732 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 733 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 734 stp->ls_clp->lc_idlen); 735 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 736 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 737 if (sad->sa_family == AF_INET) { 738 rad = (struct sockaddr_in *)sad; 739 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 740 } else { 741 rad6 = (struct sockaddr_in6 *)sad; 742 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 743 } 744 stp = LIST_NEXT(stp, ls_file); 745 cnt++; 746 } 747 748 /* 749 * and all locks. 750 */ 751 lop = LIST_FIRST(&lfp->lf_lock); 752 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 753 stp = lop->lo_stp; 754 ldumpp[cnt].ndlck_flags = lop->lo_flags; 755 ldumpp[cnt].ndlck_first = lop->lo_first; 756 ldumpp[cnt].ndlck_end = lop->lo_end; 757 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 758 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 759 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 760 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 761 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 762 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 763 stp->ls_ownerlen); 764 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 765 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 766 stp->ls_clp->lc_idlen); 767 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 768 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 769 if (sad->sa_family == AF_INET) { 770 rad = (struct sockaddr_in *)sad; 771 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 772 } else { 773 rad6 = (struct sockaddr_in6 *)sad; 774 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 775 } 776 lop = LIST_NEXT(lop, lo_lckfile); 777 cnt++; 778 } 779 780 /* 781 * and the delegations. 782 */ 783 stp = LIST_FIRST(&lfp->lf_deleg); 784 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 785 ldumpp[cnt].ndlck_flags = stp->ls_flags; 786 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 787 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 788 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 789 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 790 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 791 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 792 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 793 stp->ls_clp->lc_idlen); 794 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 795 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 796 if (sad->sa_family == AF_INET) { 797 rad = (struct sockaddr_in *)sad; 798 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 799 } else { 800 rad6 = (struct sockaddr_in6 *)sad; 801 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 802 } 803 stp = LIST_NEXT(stp, ls_file); 804 cnt++; 805 } 806 807 /* 808 * If list isn't full, mark end of list by setting the client name 809 * to zero length. 810 */ 811 if (cnt < maxcnt) 812 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 813 NFSUNLOCKSTATE(); 814 NFSLOCKV4ROOTMUTEX(); 815 nfsv4_relref(&nfsv4rootfs_lock); 816 NFSUNLOCKV4ROOTMUTEX(); 817 } 818 819 /* 820 * Server timer routine. It can scan any linked list, so long 821 * as it holds the spin/mutex lock and there is no exclusive lock on 822 * nfsv4rootfs_lock. 823 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 824 * to do this from a callout, since the spin locks work. For 825 * Darwin, I'm not sure what will work correctly yet.) 826 * Should be called once per second. 827 */ 828 APPLESTATIC void 829 nfsrv_servertimer(void) 830 { 831 struct nfsclient *clp, *nclp; 832 struct nfsstate *stp, *nstp; 833 int got_ref, i; 834 835 /* 836 * Make sure nfsboottime is set. This is used by V3 as well 837 * as V4. Note that nfsboottime is not nfsrvboottime, which is 838 * only used by the V4 server for leases. 839 */ 840 if (nfsboottime.tv_sec == 0) 841 NFSSETBOOTTIME(nfsboottime); 842 843 /* 844 * If server hasn't started yet, just return. 845 */ 846 NFSLOCKSTATE(); 847 if (nfsrv_stablefirst.nsf_eograce == 0) { 848 NFSUNLOCKSTATE(); 849 return; 850 } 851 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 852 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 853 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 854 nfsrv_stablefirst.nsf_flags |= 855 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 856 NFSUNLOCKSTATE(); 857 return; 858 } 859 860 /* 861 * Try and get a reference count on the nfsv4rootfs_lock so that 862 * no nfsd thread can acquire an exclusive lock on it before this 863 * call is done. If it is already exclusively locked, just return. 864 */ 865 NFSLOCKV4ROOTMUTEX(); 866 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 867 NFSUNLOCKV4ROOTMUTEX(); 868 if (got_ref == 0) { 869 NFSUNLOCKSTATE(); 870 return; 871 } 872 873 /* 874 * For each client... 875 */ 876 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 877 clp = LIST_FIRST(&nfsclienthash[i]); 878 while (clp != LIST_END(&nfsclienthash[i])) { 879 nclp = LIST_NEXT(clp, lc_hash); 880 if (!(clp->lc_flags & LCL_EXPIREIT)) { 881 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 882 && ((LIST_EMPTY(&clp->lc_deleg) 883 && LIST_EMPTY(&clp->lc_open)) || 884 nfsrv_clients > nfsrv_clienthighwater)) || 885 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 886 (clp->lc_expiry < NFSD_MONOSEC && 887 (nfsrv_openpluslock * 10 / 9) > NFSRV_V4STATELIMIT)) { 888 /* 889 * Lease has expired several nfsrv_lease times ago: 890 * PLUS 891 * - no state is associated with it 892 * OR 893 * - above high water mark for number of clients 894 * (nfsrv_clienthighwater should be large enough 895 * that this only occurs when clients fail to 896 * use the same nfs_client_id4.id. Maybe somewhat 897 * higher that the maximum number of clients that 898 * will mount this server?) 899 * OR 900 * Lease has expired a very long time ago 901 * OR 902 * Lease has expired PLUS the number of opens + locks 903 * has exceeded 90% of capacity 904 * 905 * --> Mark for expiry. The actual expiry will be done 906 * by an nfsd sometime soon. 907 */ 908 clp->lc_flags |= LCL_EXPIREIT; 909 nfsrv_stablefirst.nsf_flags |= 910 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 911 } else { 912 /* 913 * If there are no opens, increment no open tick cnt 914 * If time exceeds NFSNOOPEN, mark it to be thrown away 915 * otherwise, if there is an open, reset no open time 916 * Hopefully, this will avoid excessive re-creation 917 * of open owners and subsequent open confirms. 918 */ 919 stp = LIST_FIRST(&clp->lc_open); 920 while (stp != LIST_END(&clp->lc_open)) { 921 nstp = LIST_NEXT(stp, ls_list); 922 if (LIST_EMPTY(&stp->ls_open)) { 923 stp->ls_noopens++; 924 if (stp->ls_noopens > NFSNOOPEN || 925 (nfsrv_openpluslock * 2) > 926 NFSRV_V4STATELIMIT) 927 nfsrv_stablefirst.nsf_flags |= 928 NFSNSF_NOOPENS; 929 } else { 930 stp->ls_noopens = 0; 931 } 932 stp = nstp; 933 } 934 } 935 } 936 clp = nclp; 937 } 938 } 939 NFSUNLOCKSTATE(); 940 NFSLOCKV4ROOTMUTEX(); 941 nfsv4_relref(&nfsv4rootfs_lock); 942 NFSUNLOCKV4ROOTMUTEX(); 943 } 944 945 /* 946 * The following set of functions free up the various data structures. 947 */ 948 /* 949 * Clear out all open/lock state related to this nfsclient. 950 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 951 * there are no other active nfsd threads. 952 */ 953 APPLESTATIC void 954 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 955 { 956 struct nfsstate *stp, *nstp; 957 958 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 959 nfsrv_freeopenowner(stp, 1, p); 960 } 961 962 /* 963 * Free a client that has been cleaned. It should also already have been 964 * removed from the lists. 965 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 966 * softclock interrupts are enabled.) 967 */ 968 APPLESTATIC void 969 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 970 { 971 972 #ifdef notyet 973 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 974 (LCL_GSS | LCL_CALLBACKSON) && 975 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 976 clp->lc_handlelen > 0) { 977 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 978 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 979 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 980 NULL, 0, NULL, NULL, NULL, p); 981 } 982 #endif 983 newnfs_disconnect(&clp->lc_req); 984 NFSSOCKADDRFREE(clp->lc_req.nr_nam); 985 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 986 free((caddr_t)clp, M_NFSDCLIENT); 987 NFSLOCKSTATE(); 988 newnfsstats.srvclients--; 989 nfsrv_openpluslock--; 990 nfsrv_clients--; 991 NFSUNLOCKSTATE(); 992 } 993 994 /* 995 * Free a list of delegation state structures. 996 * (This function will also free all nfslockfile structures that no 997 * longer have associated state.) 998 */ 999 APPLESTATIC void 1000 nfsrv_freedeleglist(struct nfsstatehead *sthp) 1001 { 1002 struct nfsstate *stp, *nstp; 1003 1004 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1005 nfsrv_freedeleg(stp); 1006 } 1007 LIST_INIT(sthp); 1008 } 1009 1010 /* 1011 * Free up a delegation. 1012 */ 1013 static void 1014 nfsrv_freedeleg(struct nfsstate *stp) 1015 { 1016 struct nfslockfile *lfp; 1017 1018 LIST_REMOVE(stp, ls_hash); 1019 LIST_REMOVE(stp, ls_list); 1020 LIST_REMOVE(stp, ls_file); 1021 lfp = stp->ls_lfp; 1022 if (LIST_EMPTY(&lfp->lf_open) && 1023 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1024 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1025 lfp->lf_usecount == 0 && 1026 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1027 nfsrv_freenfslockfile(lfp); 1028 FREE((caddr_t)stp, M_NFSDSTATE); 1029 newnfsstats.srvdelegates--; 1030 nfsrv_openpluslock--; 1031 nfsrv_delegatecnt--; 1032 } 1033 1034 /* 1035 * This function frees an open owner and all associated opens. 1036 */ 1037 static void 1038 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1039 { 1040 struct nfsstate *nstp, *tstp; 1041 1042 LIST_REMOVE(stp, ls_list); 1043 /* 1044 * Now, free all associated opens. 1045 */ 1046 nstp = LIST_FIRST(&stp->ls_open); 1047 while (nstp != LIST_END(&stp->ls_open)) { 1048 tstp = nstp; 1049 nstp = LIST_NEXT(nstp, ls_list); 1050 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1051 } 1052 if (stp->ls_op) 1053 nfsrvd_derefcache(stp->ls_op); 1054 FREE((caddr_t)stp, M_NFSDSTATE); 1055 newnfsstats.srvopenowners--; 1056 nfsrv_openpluslock--; 1057 } 1058 1059 /* 1060 * This function frees an open (nfsstate open structure) with all associated 1061 * lock_owners and locks. It also frees the nfslockfile structure iff there 1062 * are no other opens on the file. 1063 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1064 */ 1065 static int 1066 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1067 { 1068 struct nfsstate *nstp, *tstp; 1069 struct nfslockfile *lfp; 1070 int ret; 1071 1072 LIST_REMOVE(stp, ls_hash); 1073 LIST_REMOVE(stp, ls_list); 1074 LIST_REMOVE(stp, ls_file); 1075 1076 lfp = stp->ls_lfp; 1077 /* 1078 * Now, free all lockowners associated with this open. 1079 */ 1080 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1081 nfsrv_freelockowner(tstp, vp, cansleep, p); 1082 1083 /* 1084 * The nfslockfile is freed here if there are no locks 1085 * associated with the open. 1086 * If there are locks associated with the open, the 1087 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1088 * (That is why the call must be here instead of after the loop.) 1089 */ 1090 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1091 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1092 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1093 lfp->lf_usecount == 0 && 1094 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1095 nfsrv_freenfslockfile(lfp); 1096 ret = 1; 1097 } else 1098 ret = 0; 1099 FREE((caddr_t)stp, M_NFSDSTATE); 1100 newnfsstats.srvopens--; 1101 nfsrv_openpluslock--; 1102 return (ret); 1103 } 1104 1105 /* 1106 * Frees a lockowner and all associated locks. 1107 */ 1108 static void 1109 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1110 NFSPROC_T *p) 1111 { 1112 1113 LIST_REMOVE(stp, ls_hash); 1114 LIST_REMOVE(stp, ls_list); 1115 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1116 if (stp->ls_op) 1117 nfsrvd_derefcache(stp->ls_op); 1118 FREE((caddr_t)stp, M_NFSDSTATE); 1119 newnfsstats.srvlockowners--; 1120 nfsrv_openpluslock--; 1121 } 1122 1123 /* 1124 * Free all the nfs locks on a lockowner. 1125 */ 1126 static void 1127 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1128 NFSPROC_T *p) 1129 { 1130 struct nfslock *lop, *nlop; 1131 struct nfsrollback *rlp, *nrlp; 1132 struct nfslockfile *lfp = NULL; 1133 int gottvp = 0; 1134 vnode_t tvp = NULL; 1135 1136 lop = LIST_FIRST(&stp->ls_lock); 1137 while (lop != LIST_END(&stp->ls_lock)) { 1138 nlop = LIST_NEXT(lop, lo_lckowner); 1139 /* 1140 * Since all locks should be for the same file, lfp should 1141 * not change. 1142 */ 1143 if (lfp == NULL) 1144 lfp = lop->lo_lfp; 1145 else if (lfp != lop->lo_lfp) 1146 panic("allnfslocks"); 1147 /* 1148 * If vp is NULL and cansleep != 0, a vnode must be acquired 1149 * from the file handle. This only occurs when called from 1150 * nfsrv_cleanclient(). 1151 */ 1152 if (gottvp == 0) { 1153 if (nfsrv_dolocallocks == 0) 1154 tvp = NULL; 1155 else if (vp == NULL && cansleep != 0) 1156 tvp = nfsvno_getvp(&lfp->lf_fh); 1157 else 1158 tvp = vp; 1159 gottvp = 1; 1160 } 1161 1162 if (tvp != NULL) { 1163 if (cansleep == 0) 1164 panic("allnfs2"); 1165 nfsrv_localunlock(tvp, lfp, lop->lo_first, 1166 lop->lo_end, p); 1167 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1168 nrlp) 1169 free(rlp, M_NFSDROLLBACK); 1170 LIST_INIT(&lfp->lf_rollback); 1171 } 1172 nfsrv_freenfslock(lop); 1173 lop = nlop; 1174 } 1175 if (vp == NULL && tvp != NULL) 1176 vput(tvp); 1177 } 1178 1179 /* 1180 * Free an nfslock structure. 1181 */ 1182 static void 1183 nfsrv_freenfslock(struct nfslock *lop) 1184 { 1185 1186 if (lop->lo_lckfile.le_prev != NULL) { 1187 LIST_REMOVE(lop, lo_lckfile); 1188 newnfsstats.srvlocks--; 1189 nfsrv_openpluslock--; 1190 } 1191 LIST_REMOVE(lop, lo_lckowner); 1192 FREE((caddr_t)lop, M_NFSDLOCK); 1193 } 1194 1195 /* 1196 * This function frees an nfslockfile structure. 1197 */ 1198 static void 1199 nfsrv_freenfslockfile(struct nfslockfile *lfp) 1200 { 1201 1202 LIST_REMOVE(lfp, lf_hash); 1203 FREE((caddr_t)lfp, M_NFSDLOCKFILE); 1204 } 1205 1206 /* 1207 * This function looks up an nfsstate structure via stateid. 1208 */ 1209 static int 1210 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1211 struct nfsstate **stpp) 1212 { 1213 struct nfsstate *stp; 1214 struct nfsstatehead *hp; 1215 1216 *stpp = NULL; 1217 hp = NFSSTATEHASH(clp, *stateidp); 1218 LIST_FOREACH(stp, hp, ls_hash) { 1219 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1220 NFSX_STATEIDOTHER)) 1221 break; 1222 } 1223 1224 /* 1225 * If no state id in list, return NFSERR_BADSTATEID. 1226 */ 1227 if (stp == LIST_END(hp)) 1228 return (NFSERR_BADSTATEID); 1229 *stpp = stp; 1230 return (0); 1231 } 1232 1233 /* 1234 * This function gets an nfsstate structure via owner string. 1235 */ 1236 static void 1237 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1238 struct nfsstate **stpp) 1239 { 1240 struct nfsstate *stp; 1241 1242 *stpp = NULL; 1243 LIST_FOREACH(stp, hp, ls_list) { 1244 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1245 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1246 *stpp = stp; 1247 return; 1248 } 1249 } 1250 } 1251 1252 /* 1253 * Lock control function called to update lock status. 1254 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1255 * that one isn't to be created and an NFSERR_xxx for other errors. 1256 * The structures new_stp and new_lop are passed in as pointers that should 1257 * be set to NULL if the structure is used and shouldn't be free'd. 1258 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1259 * never used and can safely be allocated on the stack. For all other 1260 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1261 * in case they are used. 1262 */ 1263 APPLESTATIC int 1264 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1265 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1266 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1267 __unused struct nfsexstuff *exp, 1268 struct nfsrv_descript *nd, NFSPROC_T *p) 1269 { 1270 struct nfslock *lop; 1271 struct nfsstate *new_stp = *new_stpp; 1272 struct nfslock *new_lop = *new_lopp; 1273 struct nfsstate *tstp, *mystp, *nstp; 1274 int specialid = 0; 1275 struct nfslockfile *lfp; 1276 struct nfslock *other_lop = NULL; 1277 struct nfsstate *stp, *lckstp = NULL; 1278 struct nfsclient *clp = NULL; 1279 u_int32_t bits; 1280 int error = 0, haslock = 0, ret, reterr; 1281 int getlckret, delegation = 0, filestruct_locked; 1282 fhandle_t nfh; 1283 uint64_t first, end; 1284 uint32_t lock_flags; 1285 1286 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1287 /* 1288 * Note the special cases of "all 1s" or "all 0s" stateids and 1289 * let reads with all 1s go ahead. 1290 */ 1291 if (new_stp->ls_stateid.seqid == 0x0 && 1292 new_stp->ls_stateid.other[0] == 0x0 && 1293 new_stp->ls_stateid.other[1] == 0x0 && 1294 new_stp->ls_stateid.other[2] == 0x0) 1295 specialid = 1; 1296 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1297 new_stp->ls_stateid.other[0] == 0xffffffff && 1298 new_stp->ls_stateid.other[1] == 0xffffffff && 1299 new_stp->ls_stateid.other[2] == 0xffffffff) 1300 specialid = 2; 1301 } 1302 1303 /* 1304 * Check for restart conditions (client and server). 1305 */ 1306 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1307 &new_stp->ls_stateid, specialid); 1308 if (error) 1309 return (error); 1310 1311 /* 1312 * Check for state resource limit exceeded. 1313 */ 1314 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1315 nfsrv_openpluslock > NFSRV_V4STATELIMIT) 1316 return (NFSERR_RESOURCE); 1317 1318 /* 1319 * For the lock case, get another nfslock structure, 1320 * just in case we need it. 1321 * Malloc now, before we start sifting through the linked lists, 1322 * in case we have to wait for memory. 1323 */ 1324 tryagain: 1325 if (new_stp->ls_flags & NFSLCK_LOCK) 1326 MALLOC(other_lop, struct nfslock *, sizeof (struct nfslock), 1327 M_NFSDLOCK, M_WAITOK); 1328 filestruct_locked = 0; 1329 reterr = 0; 1330 lfp = NULL; 1331 1332 /* 1333 * Get the lockfile structure for CFH now, so we can do a sanity 1334 * check against the stateid, before incrementing the seqid#, since 1335 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1336 * shouldn't be incremented for this case. 1337 * If nfsrv_getlockfile() returns -1, it means "not found", which 1338 * will be handled later. 1339 * If we are doing Lock/LockU and local locking is enabled, sleep 1340 * lock the nfslockfile structure. 1341 */ 1342 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1343 NFSLOCKSTATE(); 1344 if (getlckret == 0) { 1345 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1346 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1347 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1348 &lfp, &nfh, 1); 1349 if (getlckret == 0) 1350 filestruct_locked = 1; 1351 } else 1352 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1353 &lfp, &nfh, 0); 1354 } 1355 if (getlckret != 0 && getlckret != -1) 1356 reterr = getlckret; 1357 1358 if (filestruct_locked != 0) { 1359 LIST_INIT(&lfp->lf_rollback); 1360 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1361 /* 1362 * For local locking, do the advisory locking now, so 1363 * that any conflict can be detected. A failure later 1364 * can be rolled back locally. If an error is returned, 1365 * struct nfslockfile has been unlocked and any local 1366 * locking rolled back. 1367 */ 1368 NFSUNLOCKSTATE(); 1369 reterr = nfsrv_locallock(vp, lfp, 1370 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1371 new_lop->lo_first, new_lop->lo_end, cfp, p); 1372 NFSLOCKSTATE(); 1373 } 1374 } 1375 1376 if (specialid == 0) { 1377 if (new_stp->ls_flags & NFSLCK_TEST) { 1378 /* 1379 * RFC 3530 does not list LockT as an op that renews a 1380 * lease, but the concensus seems to be that it is ok 1381 * for a server to do so. 1382 */ 1383 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 1384 (nfsquad_t)((u_quad_t)0), NULL, p); 1385 1386 /* 1387 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1388 * error returns for LockT, just go ahead and test for a lock, 1389 * since there are no locks for this client, but other locks 1390 * can conflict. (ie. same client will always be false) 1391 */ 1392 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1393 error = 0; 1394 lckstp = new_stp; 1395 } else { 1396 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 1397 (nfsquad_t)((u_quad_t)0), NULL, p); 1398 if (error == 0) 1399 /* 1400 * Look up the stateid 1401 */ 1402 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1403 new_stp->ls_flags, &stp); 1404 /* 1405 * do some sanity checks for an unconfirmed open or a 1406 * stateid that refers to the wrong file, for an open stateid 1407 */ 1408 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1409 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1410 (getlckret == 0 && stp->ls_lfp != lfp))) 1411 error = NFSERR_BADSTATEID; 1412 if (error == 0 && 1413 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1414 getlckret == 0 && stp->ls_lfp != lfp) 1415 error = NFSERR_BADSTATEID; 1416 1417 /* 1418 * If the lockowner stateid doesn't refer to the same file, 1419 * I believe that is considered ok, since some clients will 1420 * only create a single lockowner and use that for all locks 1421 * on all files. 1422 * For now, log it as a diagnostic, instead of considering it 1423 * a BadStateid. 1424 */ 1425 if (error == 0 && (stp->ls_flags & 1426 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1427 getlckret == 0 && stp->ls_lfp != lfp) { 1428 #ifdef DIAGNOSTIC 1429 printf("Got a lock statid for different file open\n"); 1430 #endif 1431 /* 1432 error = NFSERR_BADSTATEID; 1433 */ 1434 } 1435 1436 if (error == 0) { 1437 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1438 /* 1439 * If haslock set, we've already checked the seqid. 1440 */ 1441 if (!haslock) { 1442 if (stp->ls_flags & NFSLCK_OPEN) 1443 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1444 stp->ls_openowner, new_stp->ls_op); 1445 else 1446 error = NFSERR_BADSTATEID; 1447 } 1448 if (!error) 1449 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1450 if (lckstp) 1451 /* 1452 * I believe this should be an error, but it 1453 * isn't obvious what NFSERR_xxx would be 1454 * appropriate, so I'll use NFSERR_INVAL for now. 1455 */ 1456 error = NFSERR_INVAL; 1457 else 1458 lckstp = new_stp; 1459 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1460 /* 1461 * If haslock set, ditto above. 1462 */ 1463 if (!haslock) { 1464 if (stp->ls_flags & NFSLCK_OPEN) 1465 error = NFSERR_BADSTATEID; 1466 else 1467 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1468 stp, new_stp->ls_op); 1469 } 1470 lckstp = stp; 1471 } else { 1472 lckstp = stp; 1473 } 1474 } 1475 /* 1476 * If the seqid part of the stateid isn't the same, return 1477 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1478 * For I/O Ops, only return NFSERR_OLDSTATEID if 1479 * nfsrv_returnoldstateid is set. (The concensus on the email 1480 * list was that most clients would prefer to not receive 1481 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1482 * is what will happen, so I use the nfsrv_returnoldstateid to 1483 * allow for either server configuration.) 1484 */ 1485 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1486 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1487 nfsrv_returnoldstateid)) 1488 error = NFSERR_OLDSTATEID; 1489 } 1490 } 1491 1492 /* 1493 * Now we can check for grace. 1494 */ 1495 if (!error) 1496 error = nfsrv_checkgrace(new_stp->ls_flags); 1497 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1498 nfsrv_checkstable(clp)) 1499 error = NFSERR_NOGRACE; 1500 /* 1501 * If we successfully Reclaimed state, note that. 1502 */ 1503 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1504 nfsrv_markstable(clp); 1505 1506 /* 1507 * At this point, either error == NFSERR_BADSTATEID or the 1508 * seqid# has been updated, so we can return any error. 1509 * If error == 0, there may be an error in: 1510 * nd_repstat - Set by the calling function. 1511 * reterr - Set above, if getting the nfslockfile structure 1512 * or acquiring the local lock failed. 1513 * (If both of these are set, nd_repstat should probably be 1514 * returned, since that error was detected before this 1515 * function call.) 1516 */ 1517 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1518 if (error == 0) { 1519 if (nd->nd_repstat != 0) 1520 error = nd->nd_repstat; 1521 else 1522 error = reterr; 1523 } 1524 if (filestruct_locked != 0) { 1525 /* Roll back local locks. */ 1526 NFSUNLOCKSTATE(); 1527 nfsrv_locallock_rollback(vp, lfp, p); 1528 NFSLOCKSTATE(); 1529 nfsrv_unlocklf(lfp); 1530 } 1531 NFSUNLOCKSTATE(); 1532 if (other_lop) 1533 FREE((caddr_t)other_lop, M_NFSDLOCK); 1534 if (haslock) { 1535 NFSLOCKV4ROOTMUTEX(); 1536 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1537 NFSUNLOCKV4ROOTMUTEX(); 1538 } 1539 return (error); 1540 } 1541 1542 /* 1543 * Check the nfsrv_getlockfile return. 1544 * Returned -1 if no structure found. 1545 */ 1546 if (getlckret == -1) { 1547 error = NFSERR_EXPIRED; 1548 /* 1549 * Called from lockt, so no lock is OK. 1550 */ 1551 if (new_stp->ls_flags & NFSLCK_TEST) { 1552 error = 0; 1553 } else if (new_stp->ls_flags & 1554 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1555 /* 1556 * Called to check for a lock, OK if the stateid is all 1557 * 1s or all 0s, but there should be an nfsstate 1558 * otherwise. 1559 * (ie. If there is no open, I'll assume no share 1560 * deny bits.) 1561 */ 1562 if (specialid) 1563 error = 0; 1564 else 1565 error = NFSERR_BADSTATEID; 1566 } 1567 NFSUNLOCKSTATE(); 1568 if (haslock) { 1569 NFSLOCKV4ROOTMUTEX(); 1570 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1571 NFSUNLOCKV4ROOTMUTEX(); 1572 } 1573 /* 1574 * Called to lock or unlock, so the lock has gone away. 1575 */ 1576 return (error); 1577 } 1578 1579 /* 1580 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 1581 * For NFSLCK_CHECK, allow a read if write access is granted, 1582 * but check for a deny. For NFSLCK_LOCK, require correct access, 1583 * which implies a conflicting deny can't exist. 1584 */ 1585 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 1586 /* 1587 * Four kinds of state id: 1588 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 1589 * - stateid for an open 1590 * - stateid for a delegation 1591 * - stateid for a lock owner 1592 */ 1593 if (!specialid) { 1594 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 1595 delegation = 1; 1596 mystp = stp; 1597 nfsrv_delaydelegtimeout(stp); 1598 } else if (stp->ls_flags & NFSLCK_OPEN) { 1599 mystp = stp; 1600 } else { 1601 mystp = stp->ls_openstp; 1602 } 1603 /* 1604 * If locking or checking, require correct access 1605 * bit set. 1606 */ 1607 if (((new_stp->ls_flags & NFSLCK_LOCK) && 1608 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 1609 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 1610 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 1611 (NFSLCK_CHECK | NFSLCK_READACCESS) && 1612 !(mystp->ls_flags & NFSLCK_READACCESS)) || 1613 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 1614 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 1615 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 1616 if (filestruct_locked != 0) { 1617 /* Roll back local locks. */ 1618 NFSUNLOCKSTATE(); 1619 nfsrv_locallock_rollback(vp, lfp, p); 1620 NFSLOCKSTATE(); 1621 nfsrv_unlocklf(lfp); 1622 } 1623 NFSUNLOCKSTATE(); 1624 if (other_lop) 1625 FREE((caddr_t)other_lop, M_NFSDLOCK); 1626 if (haslock) { 1627 NFSLOCKV4ROOTMUTEX(); 1628 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1629 NFSUNLOCKV4ROOTMUTEX(); 1630 } 1631 return (NFSERR_OPENMODE); 1632 } 1633 } else 1634 mystp = NULL; 1635 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 1636 /* 1637 * Check for a conflicting deny bit. 1638 */ 1639 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 1640 if (tstp != mystp) { 1641 bits = tstp->ls_flags; 1642 bits >>= NFSLCK_SHIFT; 1643 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 1644 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 1645 vp, p); 1646 if (ret) { 1647 /* 1648 * nfsrv_clientconflict unlocks state 1649 * when it returns non-zero. 1650 */ 1651 lckstp = NULL; 1652 goto tryagain; 1653 } 1654 NFSUNLOCKSTATE(); 1655 if (haslock) { 1656 NFSLOCKV4ROOTMUTEX(); 1657 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1658 NFSUNLOCKV4ROOTMUTEX(); 1659 } 1660 return (NFSERR_OPENMODE); 1661 } 1662 } 1663 } 1664 1665 /* We're outta here */ 1666 NFSUNLOCKSTATE(); 1667 if (haslock) { 1668 NFSLOCKV4ROOTMUTEX(); 1669 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1670 NFSUNLOCKV4ROOTMUTEX(); 1671 } 1672 return (0); 1673 } 1674 } 1675 1676 /* 1677 * For setattr, just get rid of all the Delegations for other clients. 1678 */ 1679 if (new_stp->ls_flags & NFSLCK_SETATTR) { 1680 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 1681 if (ret) { 1682 /* 1683 * nfsrv_cleandeleg() unlocks state when it 1684 * returns non-zero. 1685 */ 1686 if (ret == -1) { 1687 lckstp = NULL; 1688 goto tryagain; 1689 } 1690 return (ret); 1691 } 1692 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 1693 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 1694 LIST_EMPTY(&lfp->lf_deleg))) { 1695 NFSUNLOCKSTATE(); 1696 if (haslock) { 1697 NFSLOCKV4ROOTMUTEX(); 1698 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1699 NFSUNLOCKV4ROOTMUTEX(); 1700 } 1701 return (0); 1702 } 1703 } 1704 1705 /* 1706 * Check for a conflicting delegation. If one is found, call 1707 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 1708 * been set yet, it will get the lock. Otherwise, it will recall 1709 * the delegation. Then, we try try again... 1710 * I currently believe the conflict algorithm to be: 1711 * For Lock Ops (Lock/LockT/LockU) 1712 * - there is a conflict iff a different client has a write delegation 1713 * For Reading (Read Op) 1714 * - there is a conflict iff a different client has a write delegation 1715 * (the specialids are always a different client) 1716 * For Writing (Write/Setattr of size) 1717 * - there is a conflict if a different client has any delegation 1718 * - there is a conflict if the same client has a read delegation 1719 * (I don't understand why this isn't allowed, but that seems to be 1720 * the current concensus?) 1721 */ 1722 tstp = LIST_FIRST(&lfp->lf_deleg); 1723 while (tstp != LIST_END(&lfp->lf_deleg)) { 1724 nstp = LIST_NEXT(tstp, ls_file); 1725 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 1726 ((new_stp->ls_flags & NFSLCK_CHECK) && 1727 (new_lop->lo_flags & NFSLCK_READ))) && 1728 clp != tstp->ls_clp && 1729 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 1730 ((new_stp->ls_flags & NFSLCK_CHECK) && 1731 (new_lop->lo_flags & NFSLCK_WRITE) && 1732 (clp != tstp->ls_clp || 1733 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 1734 if (filestruct_locked != 0) { 1735 /* Roll back local locks. */ 1736 NFSUNLOCKSTATE(); 1737 nfsrv_locallock_rollback(vp, lfp, p); 1738 NFSLOCKSTATE(); 1739 nfsrv_unlocklf(lfp); 1740 } 1741 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 1742 if (ret) { 1743 /* 1744 * nfsrv_delegconflict unlocks state when it 1745 * returns non-zero, which it always does. 1746 */ 1747 if (other_lop) { 1748 FREE((caddr_t)other_lop, M_NFSDLOCK); 1749 other_lop = NULL; 1750 } 1751 if (ret == -1) { 1752 lckstp = NULL; 1753 goto tryagain; 1754 } 1755 return (ret); 1756 } 1757 /* Never gets here. */ 1758 } 1759 tstp = nstp; 1760 } 1761 1762 /* 1763 * Handle the unlock case by calling nfsrv_updatelock(). 1764 * (Should I have done some access checking above for unlock? For now, 1765 * just let it happen.) 1766 */ 1767 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 1768 first = new_lop->lo_first; 1769 end = new_lop->lo_end; 1770 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 1771 stateidp->seqid = ++(stp->ls_stateid.seqid); 1772 stateidp->other[0] = stp->ls_stateid.other[0]; 1773 stateidp->other[1] = stp->ls_stateid.other[1]; 1774 stateidp->other[2] = stp->ls_stateid.other[2]; 1775 if (filestruct_locked != 0) { 1776 NFSUNLOCKSTATE(); 1777 /* Update the local locks. */ 1778 nfsrv_localunlock(vp, lfp, first, end, p); 1779 NFSLOCKSTATE(); 1780 nfsrv_unlocklf(lfp); 1781 } 1782 NFSUNLOCKSTATE(); 1783 if (haslock) { 1784 NFSLOCKV4ROOTMUTEX(); 1785 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1786 NFSUNLOCKV4ROOTMUTEX(); 1787 } 1788 return (0); 1789 } 1790 1791 /* 1792 * Search for a conflicting lock. A lock conflicts if: 1793 * - the lock range overlaps and 1794 * - at least one lock is a write lock and 1795 * - it is not owned by the same lock owner 1796 */ 1797 if (!delegation) { 1798 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 1799 if (new_lop->lo_end > lop->lo_first && 1800 new_lop->lo_first < lop->lo_end && 1801 (new_lop->lo_flags == NFSLCK_WRITE || 1802 lop->lo_flags == NFSLCK_WRITE) && 1803 lckstp != lop->lo_stp && 1804 (clp != lop->lo_stp->ls_clp || 1805 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 1806 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 1807 lckstp->ls_ownerlen))) { 1808 if (other_lop) { 1809 FREE((caddr_t)other_lop, M_NFSDLOCK); 1810 other_lop = NULL; 1811 } 1812 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp,&haslock,vp,p); 1813 if (ret) { 1814 if (filestruct_locked != 0) { 1815 /* Roll back local locks. */ 1816 nfsrv_locallock_rollback(vp, lfp, p); 1817 NFSLOCKSTATE(); 1818 nfsrv_unlocklf(lfp); 1819 NFSUNLOCKSTATE(); 1820 } 1821 /* 1822 * nfsrv_clientconflict() unlocks state when it 1823 * returns non-zero. 1824 */ 1825 lckstp = NULL; 1826 goto tryagain; 1827 } 1828 /* 1829 * Found a conflicting lock, so record the conflict and 1830 * return the error. 1831 */ 1832 if (cfp) { 1833 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 1834 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 1835 cfp->cl_first = lop->lo_first; 1836 cfp->cl_end = lop->lo_end; 1837 cfp->cl_flags = lop->lo_flags; 1838 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 1839 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 1840 cfp->cl_ownerlen); 1841 } 1842 if (new_stp->ls_flags & NFSLCK_RECLAIM) 1843 error = NFSERR_RECLAIMCONFLICT; 1844 else if (new_stp->ls_flags & NFSLCK_CHECK) 1845 error = NFSERR_LOCKED; 1846 else 1847 error = NFSERR_DENIED; 1848 if (filestruct_locked != 0) { 1849 /* Roll back local locks. */ 1850 NFSUNLOCKSTATE(); 1851 nfsrv_locallock_rollback(vp, lfp, p); 1852 NFSLOCKSTATE(); 1853 nfsrv_unlocklf(lfp); 1854 } 1855 NFSUNLOCKSTATE(); 1856 if (haslock) { 1857 NFSLOCKV4ROOTMUTEX(); 1858 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1859 NFSUNLOCKV4ROOTMUTEX(); 1860 } 1861 return (error); 1862 } 1863 } 1864 } 1865 1866 /* 1867 * We only get here if there was no lock that conflicted. 1868 */ 1869 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 1870 NFSUNLOCKSTATE(); 1871 if (haslock) { 1872 NFSLOCKV4ROOTMUTEX(); 1873 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1874 NFSUNLOCKV4ROOTMUTEX(); 1875 } 1876 return (0); 1877 } 1878 1879 /* 1880 * We only get here when we are creating or modifying a lock. 1881 * There are two variants: 1882 * - exist_lock_owner where lock_owner exists 1883 * - open_to_lock_owner with new lock_owner 1884 */ 1885 first = new_lop->lo_first; 1886 end = new_lop->lo_end; 1887 lock_flags = new_lop->lo_flags; 1888 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 1889 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 1890 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 1891 stateidp->other[0] = lckstp->ls_stateid.other[0]; 1892 stateidp->other[1] = lckstp->ls_stateid.other[1]; 1893 stateidp->other[2] = lckstp->ls_stateid.other[2]; 1894 } else { 1895 /* 1896 * The new open_to_lock_owner case. 1897 * Link the new nfsstate into the lists. 1898 */ 1899 new_stp->ls_seq = new_stp->ls_opentolockseq; 1900 nfsrvd_refcache(new_stp->ls_op); 1901 stateidp->seqid = new_stp->ls_stateid.seqid = 0; 1902 stateidp->other[0] = new_stp->ls_stateid.other[0] = 1903 clp->lc_clientid.lval[0]; 1904 stateidp->other[1] = new_stp->ls_stateid.other[1] = 1905 clp->lc_clientid.lval[1]; 1906 stateidp->other[2] = new_stp->ls_stateid.other[2] = 1907 nfsrv_nextstateindex(clp); 1908 new_stp->ls_clp = clp; 1909 LIST_INIT(&new_stp->ls_lock); 1910 new_stp->ls_openstp = stp; 1911 new_stp->ls_lfp = lfp; 1912 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 1913 lfp); 1914 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 1915 new_stp, ls_hash); 1916 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 1917 *new_lopp = NULL; 1918 *new_stpp = NULL; 1919 newnfsstats.srvlockowners++; 1920 nfsrv_openpluslock++; 1921 } 1922 if (filestruct_locked != 0) { 1923 NFSUNLOCKSTATE(); 1924 nfsrv_locallock_commit(lfp, lock_flags, first, end); 1925 NFSLOCKSTATE(); 1926 nfsrv_unlocklf(lfp); 1927 } 1928 NFSUNLOCKSTATE(); 1929 if (haslock) { 1930 NFSLOCKV4ROOTMUTEX(); 1931 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1932 NFSUNLOCKV4ROOTMUTEX(); 1933 } 1934 if (other_lop) 1935 FREE((caddr_t)other_lop, M_NFSDLOCK); 1936 return (0); 1937 } 1938 1939 /* 1940 * Check for state errors for Open. 1941 * repstat is passed back out as an error if more critical errors 1942 * are not detected. 1943 */ 1944 APPLESTATIC int 1945 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 1946 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 1947 NFSPROC_T *p, int repstat) 1948 { 1949 struct nfsstate *stp, *nstp; 1950 struct nfsclient *clp; 1951 struct nfsstate *ownerstp; 1952 struct nfslockfile *lfp, *new_lfp; 1953 int error, haslock = 0, ret, readonly = 0, getfhret = 0; 1954 1955 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 1956 readonly = 1; 1957 /* 1958 * Check for restart conditions (client and server). 1959 */ 1960 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1961 &new_stp->ls_stateid, 0); 1962 if (error) 1963 return (error); 1964 1965 /* 1966 * Check for state resource limit exceeded. 1967 * Technically this should be SMP protected, but the worst 1968 * case error is "out by one or two" on the count when it 1969 * returns NFSERR_RESOURCE and the limit is just a rather 1970 * arbitrary high water mark, so no harm is done. 1971 */ 1972 if (nfsrv_openpluslock > NFSRV_V4STATELIMIT) 1973 return (NFSERR_RESOURCE); 1974 1975 tryagain: 1976 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 1977 M_NFSDLOCKFILE, M_WAITOK); 1978 if (vp) 1979 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, &new_lfp, 1980 NULL, p); 1981 NFSLOCKSTATE(); 1982 /* 1983 * Get the nfsclient structure. 1984 */ 1985 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 1986 (nfsquad_t)((u_quad_t)0), NULL, p); 1987 1988 /* 1989 * Look up the open owner. See if it needs confirmation and 1990 * check the seq#, as required. 1991 */ 1992 if (!error) 1993 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 1994 1995 if (!error && ownerstp) { 1996 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 1997 new_stp->ls_op); 1998 /* 1999 * If the OpenOwner hasn't been confirmed, assume the 2000 * old one was a replay and this one is ok. 2001 * See: RFC3530 Sec. 14.2.18. 2002 */ 2003 if (error == NFSERR_BADSEQID && 2004 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2005 error = 0; 2006 } 2007 2008 /* 2009 * Check for grace. 2010 */ 2011 if (!error) 2012 error = nfsrv_checkgrace(new_stp->ls_flags); 2013 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2014 nfsrv_checkstable(clp)) 2015 error = NFSERR_NOGRACE; 2016 2017 /* 2018 * If none of the above errors occurred, let repstat be 2019 * returned. 2020 */ 2021 if (repstat && !error) 2022 error = repstat; 2023 if (error) { 2024 NFSUNLOCKSTATE(); 2025 if (haslock) { 2026 NFSLOCKV4ROOTMUTEX(); 2027 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2028 NFSUNLOCKV4ROOTMUTEX(); 2029 } 2030 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2031 return (error); 2032 } 2033 2034 /* 2035 * If vp == NULL, the file doesn't exist yet, so return ok. 2036 * (This always happens on the first pass, so haslock must be 0.) 2037 */ 2038 if (vp == NULL) { 2039 NFSUNLOCKSTATE(); 2040 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2041 return (0); 2042 } 2043 2044 /* 2045 * Get the structure for the underlying file. 2046 */ 2047 if (getfhret) 2048 error = getfhret; 2049 else 2050 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2051 NULL, 0); 2052 if (new_lfp) 2053 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2054 if (error) { 2055 NFSUNLOCKSTATE(); 2056 if (haslock) { 2057 NFSLOCKV4ROOTMUTEX(); 2058 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2059 NFSUNLOCKV4ROOTMUTEX(); 2060 } 2061 return (error); 2062 } 2063 2064 /* 2065 * Search for a conflicting open/share. 2066 */ 2067 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2068 /* 2069 * For Delegate_Cur, search for the matching Delegation, 2070 * which indicates no conflict. 2071 * An old delegation should have been recovered by the 2072 * client doing a Claim_DELEGATE_Prev, so I won't let 2073 * it match and return NFSERR_EXPIRED. Should I let it 2074 * match? 2075 */ 2076 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2077 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2078 stateidp->seqid == stp->ls_stateid.seqid && 2079 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2080 NFSX_STATEIDOTHER)) 2081 break; 2082 } 2083 if (stp == LIST_END(&lfp->lf_deleg) || 2084 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2085 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2086 NFSUNLOCKSTATE(); 2087 if (haslock) { 2088 NFSLOCKV4ROOTMUTEX(); 2089 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2090 NFSUNLOCKV4ROOTMUTEX(); 2091 } 2092 return (NFSERR_EXPIRED); 2093 } 2094 } 2095 2096 /* 2097 * Check for access/deny bit conflicts. I check for the same 2098 * owner as well, in case the client didn't bother. 2099 */ 2100 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2101 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2102 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2103 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2104 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2105 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2106 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2107 if (ret) { 2108 /* 2109 * nfsrv_clientconflict() unlocks 2110 * state when it returns non-zero. 2111 */ 2112 goto tryagain; 2113 } 2114 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2115 error = NFSERR_RECLAIMCONFLICT; 2116 else 2117 error = NFSERR_SHAREDENIED; 2118 NFSUNLOCKSTATE(); 2119 if (haslock) { 2120 NFSLOCKV4ROOTMUTEX(); 2121 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2122 NFSUNLOCKV4ROOTMUTEX(); 2123 } 2124 return (error); 2125 } 2126 } 2127 2128 /* 2129 * Check for a conflicting delegation. If one is found, call 2130 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2131 * been set yet, it will get the lock. Otherwise, it will recall 2132 * the delegation. Then, we try try again... 2133 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2134 * isn't a conflict.) 2135 * I currently believe the conflict algorithm to be: 2136 * For Open with Read Access and Deny None 2137 * - there is a conflict iff a different client has a write delegation 2138 * For Open with other Write Access or any Deny except None 2139 * - there is a conflict if a different client has any delegation 2140 * - there is a conflict if the same client has a read delegation 2141 * (The current concensus is that this last case should be 2142 * considered a conflict since the client with a read delegation 2143 * could have done an Open with ReadAccess and WriteDeny 2144 * locally and then not have checked for the WriteDeny.) 2145 * Don't check for a Reclaim, since that will be dealt with 2146 * by nfsrv_openctrl(). 2147 */ 2148 if (!(new_stp->ls_flags & 2149 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2150 stp = LIST_FIRST(&lfp->lf_deleg); 2151 while (stp != LIST_END(&lfp->lf_deleg)) { 2152 nstp = LIST_NEXT(stp, ls_file); 2153 if ((readonly && stp->ls_clp != clp && 2154 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2155 (!readonly && (stp->ls_clp != clp || 2156 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2157 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2158 if (ret) { 2159 /* 2160 * nfsrv_delegconflict() unlocks state 2161 * when it returns non-zero. 2162 */ 2163 if (ret == -1) 2164 goto tryagain; 2165 return (ret); 2166 } 2167 } 2168 stp = nstp; 2169 } 2170 } 2171 NFSUNLOCKSTATE(); 2172 if (haslock) { 2173 NFSLOCKV4ROOTMUTEX(); 2174 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2175 NFSUNLOCKV4ROOTMUTEX(); 2176 } 2177 return (0); 2178 } 2179 2180 /* 2181 * Open control function to create/update open state for an open. 2182 */ 2183 APPLESTATIC int 2184 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2185 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2186 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2187 NFSPROC_T *p, u_quad_t filerev) 2188 { 2189 struct nfsstate *new_stp = *new_stpp; 2190 struct nfsstate *stp, *nstp; 2191 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2192 struct nfslockfile *lfp, *new_lfp; 2193 struct nfsclient *clp; 2194 int error, haslock = 0, ret, delegate = 1, writedeleg = 1; 2195 int readonly = 0, cbret = 1, getfhret = 0; 2196 2197 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2198 readonly = 1; 2199 /* 2200 * Check for restart conditions (client and server). 2201 * (Paranoia, should have been detected by nfsrv_opencheck().) 2202 * If an error does show up, return NFSERR_EXPIRED, since the 2203 * the seqid# has already been incremented. 2204 */ 2205 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2206 &new_stp->ls_stateid, 0); 2207 if (error) { 2208 printf("Nfsd: openctrl unexpected restart err=%d\n", 2209 error); 2210 return (NFSERR_EXPIRED); 2211 } 2212 2213 tryagain: 2214 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2215 M_NFSDLOCKFILE, M_WAITOK); 2216 MALLOC(new_open, struct nfsstate *, sizeof (struct nfsstate), 2217 M_NFSDSTATE, M_WAITOK); 2218 MALLOC(new_deleg, struct nfsstate *, sizeof (struct nfsstate), 2219 M_NFSDSTATE, M_WAITOK); 2220 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, &new_lfp, 2221 NULL, p); 2222 NFSLOCKSTATE(); 2223 /* 2224 * Get the client structure. Since the linked lists could be changed 2225 * by other nfsd processes if this process does a tsleep(), one of 2226 * two things must be done. 2227 * 1 - don't tsleep() 2228 * or 2229 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2230 * before using the lists, since this lock stops the other 2231 * nfsd. This should only be used for rare cases, since it 2232 * essentially single threads the nfsd. 2233 * At this time, it is only done for cases where the stable 2234 * storage file must be written prior to completion of state 2235 * expiration. 2236 */ 2237 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 2238 (nfsquad_t)((u_quad_t)0), NULL, p); 2239 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2240 clp->lc_program) { 2241 /* 2242 * This happens on the first open for a client 2243 * that supports callbacks. 2244 */ 2245 NFSUNLOCKSTATE(); 2246 /* 2247 * Although nfsrv_docallback() will sleep, clp won't 2248 * go away, since they are only removed when the 2249 * nfsv4_lock() has blocked the nfsd threads. The 2250 * fields in clp can change, but having multiple 2251 * threads do this Null callback RPC should be 2252 * harmless. 2253 */ 2254 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2255 NULL, 0, NULL, NULL, NULL, p); 2256 NFSLOCKSTATE(); 2257 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2258 if (!cbret) 2259 clp->lc_flags |= LCL_CALLBACKSON; 2260 } 2261 2262 /* 2263 * Look up the open owner. See if it needs confirmation and 2264 * check the seq#, as required. 2265 */ 2266 if (!error) 2267 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2268 2269 if (error) { 2270 NFSUNLOCKSTATE(); 2271 printf("Nfsd: openctrl unexpected state err=%d\n", 2272 error); 2273 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2274 free((caddr_t)new_open, M_NFSDSTATE); 2275 free((caddr_t)new_deleg, M_NFSDSTATE); 2276 if (haslock) { 2277 NFSLOCKV4ROOTMUTEX(); 2278 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2279 NFSUNLOCKV4ROOTMUTEX(); 2280 } 2281 return (NFSERR_EXPIRED); 2282 } 2283 2284 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2285 nfsrv_markstable(clp); 2286 2287 /* 2288 * Get the structure for the underlying file. 2289 */ 2290 if (getfhret) 2291 error = getfhret; 2292 else 2293 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2294 NULL, 0); 2295 if (new_lfp) 2296 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2297 if (error) { 2298 NFSUNLOCKSTATE(); 2299 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2300 error); 2301 free((caddr_t)new_open, M_NFSDSTATE); 2302 free((caddr_t)new_deleg, M_NFSDSTATE); 2303 if (haslock) { 2304 NFSLOCKV4ROOTMUTEX(); 2305 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2306 NFSUNLOCKV4ROOTMUTEX(); 2307 } 2308 return (error); 2309 } 2310 2311 /* 2312 * Search for a conflicting open/share. 2313 */ 2314 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2315 /* 2316 * For Delegate_Cur, search for the matching Delegation, 2317 * which indicates no conflict. 2318 * An old delegation should have been recovered by the 2319 * client doing a Claim_DELEGATE_Prev, so I won't let 2320 * it match and return NFSERR_EXPIRED. Should I let it 2321 * match? 2322 */ 2323 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2324 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2325 stateidp->seqid == stp->ls_stateid.seqid && 2326 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2327 NFSX_STATEIDOTHER)) 2328 break; 2329 } 2330 if (stp == LIST_END(&lfp->lf_deleg) || 2331 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2332 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2333 NFSUNLOCKSTATE(); 2334 printf("Nfsd openctrl unexpected expiry\n"); 2335 free((caddr_t)new_open, M_NFSDSTATE); 2336 free((caddr_t)new_deleg, M_NFSDSTATE); 2337 if (haslock) { 2338 NFSLOCKV4ROOTMUTEX(); 2339 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2340 NFSUNLOCKV4ROOTMUTEX(); 2341 } 2342 return (NFSERR_EXPIRED); 2343 } 2344 2345 /* 2346 * Don't issue a Delegation, since one already exists and 2347 * delay delegation timeout, as required. 2348 */ 2349 delegate = 0; 2350 nfsrv_delaydelegtimeout(stp); 2351 } 2352 2353 /* 2354 * Check for access/deny bit conflicts. I also check for the 2355 * same owner, since the client might not have bothered to check. 2356 * Also, note an open for the same file and owner, if found, 2357 * which is all we do here for Delegate_Cur, since conflict 2358 * checking is already done. 2359 */ 2360 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2361 if (ownerstp && stp->ls_openowner == ownerstp) 2362 openstp = stp; 2363 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2364 /* 2365 * If another client has the file open, the only 2366 * delegation that can be issued is a Read delegation 2367 * and only if it is a Read open with Deny none. 2368 */ 2369 if (clp != stp->ls_clp) { 2370 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2371 NFSLCK_READACCESS) 2372 writedeleg = 0; 2373 else 2374 delegate = 0; 2375 } 2376 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2377 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2378 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2379 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2380 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2381 if (ret) { 2382 /* 2383 * nfsrv_clientconflict() unlocks state 2384 * when it returns non-zero. 2385 */ 2386 free((caddr_t)new_open, M_NFSDSTATE); 2387 free((caddr_t)new_deleg, M_NFSDSTATE); 2388 openstp = NULL; 2389 goto tryagain; 2390 } 2391 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2392 error = NFSERR_RECLAIMCONFLICT; 2393 else 2394 error = NFSERR_SHAREDENIED; 2395 NFSUNLOCKSTATE(); 2396 if (haslock) { 2397 NFSLOCKV4ROOTMUTEX(); 2398 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2399 NFSUNLOCKV4ROOTMUTEX(); 2400 } 2401 free((caddr_t)new_open, M_NFSDSTATE); 2402 free((caddr_t)new_deleg, M_NFSDSTATE); 2403 printf("nfsd openctrl unexpected client cnfl\n"); 2404 return (error); 2405 } 2406 } 2407 } 2408 2409 /* 2410 * Check for a conflicting delegation. If one is found, call 2411 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2412 * been set yet, it will get the lock. Otherwise, it will recall 2413 * the delegation. Then, we try try again... 2414 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2415 * isn't a conflict.) 2416 * I currently believe the conflict algorithm to be: 2417 * For Open with Read Access and Deny None 2418 * - there is a conflict iff a different client has a write delegation 2419 * For Open with other Write Access or any Deny except None 2420 * - there is a conflict if a different client has any delegation 2421 * - there is a conflict if the same client has a read delegation 2422 * (The current concensus is that this last case should be 2423 * considered a conflict since the client with a read delegation 2424 * could have done an Open with ReadAccess and WriteDeny 2425 * locally and then not have checked for the WriteDeny.) 2426 */ 2427 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2428 stp = LIST_FIRST(&lfp->lf_deleg); 2429 while (stp != LIST_END(&lfp->lf_deleg)) { 2430 nstp = LIST_NEXT(stp, ls_file); 2431 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2432 writedeleg = 0; 2433 else 2434 delegate = 0; 2435 if ((readonly && stp->ls_clp != clp && 2436 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2437 (!readonly && (stp->ls_clp != clp || 2438 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2439 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2440 delegate = 2; 2441 } else { 2442 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2443 if (ret) { 2444 /* 2445 * nfsrv_delegconflict() unlocks state 2446 * when it returns non-zero. 2447 */ 2448 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2449 free((caddr_t)new_open, M_NFSDSTATE); 2450 free((caddr_t)new_deleg, M_NFSDSTATE); 2451 if (ret == -1) { 2452 openstp = NULL; 2453 goto tryagain; 2454 } 2455 return (ret); 2456 } 2457 } 2458 } 2459 stp = nstp; 2460 } 2461 } 2462 2463 /* 2464 * We only get here if there was no open that conflicted. 2465 * If an open for the owner exists, or in the access/deny bits. 2466 * Otherwise it is a new open. If the open_owner hasn't been 2467 * confirmed, replace the open with the new one needing confirmation, 2468 * otherwise add the open. 2469 */ 2470 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2471 /* 2472 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2473 * a match. If found, just move the old delegation to the current 2474 * delegation list and issue open. If not found, return 2475 * NFSERR_EXPIRED. 2476 */ 2477 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2478 if (stp->ls_lfp == lfp) { 2479 /* Found it */ 2480 if (stp->ls_clp != clp) 2481 panic("olddeleg clp"); 2482 LIST_REMOVE(stp, ls_list); 2483 LIST_REMOVE(stp, ls_hash); 2484 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2485 stp->ls_stateid.seqid = delegstateidp->seqid = 0; 2486 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2487 clp->lc_clientid.lval[0]; 2488 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2489 clp->lc_clientid.lval[1]; 2490 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2491 nfsrv_nextstateindex(clp); 2492 stp->ls_compref = nd->nd_compref; 2493 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2494 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2495 stp->ls_stateid), stp, ls_hash); 2496 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2497 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2498 else 2499 *rflagsp |= NFSV4OPEN_READDELEGATE; 2500 clp->lc_delegtime = NFSD_MONOSEC + 2501 nfsrv_lease + NFSRV_LEASEDELTA; 2502 2503 /* 2504 * Now, do the associated open. 2505 */ 2506 new_open->ls_stateid.seqid = 0; 2507 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2508 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2509 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2510 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2511 NFSLCK_OPEN; 2512 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2513 new_open->ls_flags |= (NFSLCK_READACCESS | 2514 NFSLCK_WRITEACCESS); 2515 else 2516 new_open->ls_flags |= NFSLCK_READACCESS; 2517 new_open->ls_uid = new_stp->ls_uid; 2518 new_open->ls_lfp = lfp; 2519 new_open->ls_clp = clp; 2520 LIST_INIT(&new_open->ls_open); 2521 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2522 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2523 new_open, ls_hash); 2524 /* 2525 * and handle the open owner 2526 */ 2527 if (ownerstp) { 2528 new_open->ls_openowner = ownerstp; 2529 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 2530 } else { 2531 new_open->ls_openowner = new_stp; 2532 new_stp->ls_flags = 0; 2533 nfsrvd_refcache(new_stp->ls_op); 2534 new_stp->ls_noopens = 0; 2535 LIST_INIT(&new_stp->ls_open); 2536 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2537 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2538 *new_stpp = NULL; 2539 newnfsstats.srvopenowners++; 2540 nfsrv_openpluslock++; 2541 } 2542 openstp = new_open; 2543 new_open = NULL; 2544 newnfsstats.srvopens++; 2545 nfsrv_openpluslock++; 2546 break; 2547 } 2548 } 2549 if (stp == LIST_END(&clp->lc_olddeleg)) 2550 error = NFSERR_EXPIRED; 2551 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2552 /* 2553 * Scan to see that no delegation for this client and file 2554 * doesn't already exist. 2555 * There also shouldn't yet be an Open for this file and 2556 * openowner. 2557 */ 2558 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2559 if (stp->ls_clp == clp) 2560 break; 2561 } 2562 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 2563 /* 2564 * This is the Claim_Previous case with a delegation 2565 * type != Delegate_None. 2566 */ 2567 /* 2568 * First, add the delegation. (Although we must issue the 2569 * delegation, we can also ask for an immediate return.) 2570 */ 2571 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 0; 2572 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 2573 clp->lc_clientid.lval[0]; 2574 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 2575 clp->lc_clientid.lval[1]; 2576 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 2577 nfsrv_nextstateindex(clp); 2578 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 2579 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2580 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2581 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2582 } else { 2583 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2584 NFSLCK_READACCESS); 2585 *rflagsp |= NFSV4OPEN_READDELEGATE; 2586 } 2587 new_deleg->ls_uid = new_stp->ls_uid; 2588 new_deleg->ls_lfp = lfp; 2589 new_deleg->ls_clp = clp; 2590 new_deleg->ls_filerev = filerev; 2591 new_deleg->ls_compref = nd->nd_compref; 2592 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2593 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2594 new_deleg->ls_stateid), new_deleg, ls_hash); 2595 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2596 new_deleg = NULL; 2597 if (delegate == 2 || nfsrv_issuedelegs == 0 || 2598 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 2599 LCL_CALLBACKSON || 2600 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 2601 !NFSVNO_DELEGOK(vp)) 2602 *rflagsp |= NFSV4OPEN_RECALL; 2603 newnfsstats.srvdelegates++; 2604 nfsrv_openpluslock++; 2605 nfsrv_delegatecnt++; 2606 2607 /* 2608 * Now, do the associated open. 2609 */ 2610 new_open->ls_stateid.seqid = 0; 2611 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2612 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2613 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2614 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 2615 NFSLCK_OPEN; 2616 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 2617 new_open->ls_flags |= (NFSLCK_READACCESS | 2618 NFSLCK_WRITEACCESS); 2619 else 2620 new_open->ls_flags |= NFSLCK_READACCESS; 2621 new_open->ls_uid = new_stp->ls_uid; 2622 new_open->ls_lfp = lfp; 2623 new_open->ls_clp = clp; 2624 LIST_INIT(&new_open->ls_open); 2625 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2626 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2627 new_open, ls_hash); 2628 /* 2629 * and handle the open owner 2630 */ 2631 if (ownerstp) { 2632 new_open->ls_openowner = ownerstp; 2633 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2634 } else { 2635 new_open->ls_openowner = new_stp; 2636 new_stp->ls_flags = 0; 2637 nfsrvd_refcache(new_stp->ls_op); 2638 new_stp->ls_noopens = 0; 2639 LIST_INIT(&new_stp->ls_open); 2640 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2641 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2642 *new_stpp = NULL; 2643 newnfsstats.srvopenowners++; 2644 nfsrv_openpluslock++; 2645 } 2646 openstp = new_open; 2647 new_open = NULL; 2648 newnfsstats.srvopens++; 2649 nfsrv_openpluslock++; 2650 } else { 2651 error = NFSERR_RECLAIMCONFLICT; 2652 } 2653 } else if (ownerstp) { 2654 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 2655 /* Replace the open */ 2656 if (ownerstp->ls_op) 2657 nfsrvd_derefcache(ownerstp->ls_op); 2658 ownerstp->ls_op = new_stp->ls_op; 2659 nfsrvd_refcache(ownerstp->ls_op); 2660 ownerstp->ls_seq = new_stp->ls_seq; 2661 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 2662 stp = LIST_FIRST(&ownerstp->ls_open); 2663 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 2664 NFSLCK_OPEN; 2665 stp->ls_stateid.seqid = 0; 2666 stp->ls_uid = new_stp->ls_uid; 2667 if (lfp != stp->ls_lfp) { 2668 LIST_REMOVE(stp, ls_file); 2669 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 2670 stp->ls_lfp = lfp; 2671 } 2672 openstp = stp; 2673 } else if (openstp) { 2674 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 2675 openstp->ls_stateid.seqid++; 2676 2677 /* 2678 * This is where we can choose to issue a delegation. 2679 */ 2680 if (delegate && nfsrv_issuedelegs && 2681 writedeleg && !NFSVNO_EXRDONLY(exp) && 2682 (nfsrv_writedelegifpos || !readonly) && 2683 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 2684 LCL_CALLBACKSON && 2685 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 2686 NFSVNO_DELEGOK(vp)) { 2687 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 0; 2688 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 2689 = clp->lc_clientid.lval[0]; 2690 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 2691 = clp->lc_clientid.lval[1]; 2692 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 2693 = nfsrv_nextstateindex(clp); 2694 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2695 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2696 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2697 new_deleg->ls_uid = new_stp->ls_uid; 2698 new_deleg->ls_lfp = lfp; 2699 new_deleg->ls_clp = clp; 2700 new_deleg->ls_filerev = filerev; 2701 new_deleg->ls_compref = nd->nd_compref; 2702 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2703 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2704 new_deleg->ls_stateid), new_deleg, ls_hash); 2705 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2706 new_deleg = NULL; 2707 newnfsstats.srvdelegates++; 2708 nfsrv_openpluslock++; 2709 nfsrv_delegatecnt++; 2710 } 2711 } else { 2712 new_open->ls_stateid.seqid = 0; 2713 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2714 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2715 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2716 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 2717 NFSLCK_OPEN; 2718 new_open->ls_uid = new_stp->ls_uid; 2719 new_open->ls_openowner = ownerstp; 2720 new_open->ls_lfp = lfp; 2721 new_open->ls_clp = clp; 2722 LIST_INIT(&new_open->ls_open); 2723 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2724 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2725 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2726 new_open, ls_hash); 2727 openstp = new_open; 2728 new_open = NULL; 2729 newnfsstats.srvopens++; 2730 nfsrv_openpluslock++; 2731 2732 /* 2733 * This is where we can choose to issue a delegation. 2734 */ 2735 if (delegate && nfsrv_issuedelegs && 2736 (writedeleg || readonly) && 2737 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 2738 LCL_CALLBACKSON && 2739 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 2740 NFSVNO_DELEGOK(vp)) { 2741 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 0; 2742 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 2743 = clp->lc_clientid.lval[0]; 2744 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 2745 = clp->lc_clientid.lval[1]; 2746 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 2747 = nfsrv_nextstateindex(clp); 2748 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 2749 (nfsrv_writedelegifpos || !readonly)) { 2750 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2751 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2752 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2753 } else { 2754 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2755 NFSLCK_READACCESS); 2756 *rflagsp |= NFSV4OPEN_READDELEGATE; 2757 } 2758 new_deleg->ls_uid = new_stp->ls_uid; 2759 new_deleg->ls_lfp = lfp; 2760 new_deleg->ls_clp = clp; 2761 new_deleg->ls_filerev = filerev; 2762 new_deleg->ls_compref = nd->nd_compref; 2763 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2764 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2765 new_deleg->ls_stateid), new_deleg, ls_hash); 2766 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2767 new_deleg = NULL; 2768 newnfsstats.srvdelegates++; 2769 nfsrv_openpluslock++; 2770 nfsrv_delegatecnt++; 2771 } 2772 } 2773 } else { 2774 /* 2775 * New owner case. Start the open_owner sequence with a 2776 * Needs confirmation (unless a reclaim) and hang the 2777 * new open off it. 2778 */ 2779 new_open->ls_stateid.seqid = 0; 2780 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2781 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2782 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2783 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 2784 NFSLCK_OPEN; 2785 new_open->ls_uid = new_stp->ls_uid; 2786 LIST_INIT(&new_open->ls_open); 2787 new_open->ls_openowner = new_stp; 2788 new_open->ls_lfp = lfp; 2789 new_open->ls_clp = clp; 2790 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2791 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2792 new_stp->ls_flags = 0; 2793 } else { 2794 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 2795 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 2796 } 2797 nfsrvd_refcache(new_stp->ls_op); 2798 new_stp->ls_noopens = 0; 2799 LIST_INIT(&new_stp->ls_open); 2800 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2801 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2802 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2803 new_open, ls_hash); 2804 openstp = new_open; 2805 new_open = NULL; 2806 *new_stpp = NULL; 2807 newnfsstats.srvopens++; 2808 nfsrv_openpluslock++; 2809 newnfsstats.srvopenowners++; 2810 nfsrv_openpluslock++; 2811 } 2812 if (!error) { 2813 stateidp->seqid = openstp->ls_stateid.seqid; 2814 stateidp->other[0] = openstp->ls_stateid.other[0]; 2815 stateidp->other[1] = openstp->ls_stateid.other[1]; 2816 stateidp->other[2] = openstp->ls_stateid.other[2]; 2817 } 2818 NFSUNLOCKSTATE(); 2819 if (haslock) { 2820 NFSLOCKV4ROOTMUTEX(); 2821 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2822 NFSUNLOCKV4ROOTMUTEX(); 2823 } 2824 if (new_open) 2825 FREE((caddr_t)new_open, M_NFSDSTATE); 2826 if (new_deleg) 2827 FREE((caddr_t)new_deleg, M_NFSDSTATE); 2828 return (error); 2829 } 2830 2831 /* 2832 * Open update. Does the confirm, downgrade and close. 2833 */ 2834 APPLESTATIC int 2835 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 2836 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p) 2837 { 2838 struct nfsstate *stp, *ownerstp; 2839 struct nfsclient *clp; 2840 struct nfslockfile *lfp; 2841 u_int32_t bits; 2842 int error, gotstate = 0, len = 0; 2843 u_char client[NFSV4_OPAQUELIMIT]; 2844 2845 /* 2846 * Check for restart conditions (client and server). 2847 */ 2848 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2849 &new_stp->ls_stateid, 0); 2850 if (error) 2851 return (error); 2852 2853 NFSLOCKSTATE(); 2854 /* 2855 * Get the open structure via clientid and stateid. 2856 */ 2857 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 2858 (nfsquad_t)((u_quad_t)0), NULL, p); 2859 if (!error) 2860 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 2861 new_stp->ls_flags, &stp); 2862 2863 /* 2864 * Sanity check the open. 2865 */ 2866 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 2867 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 2868 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 2869 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 2870 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 2871 error = NFSERR_BADSTATEID; 2872 2873 if (!error) 2874 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 2875 stp->ls_openowner, new_stp->ls_op); 2876 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 2877 !(new_stp->ls_flags & NFSLCK_CONFIRM)) 2878 error = NFSERR_OLDSTATEID; 2879 if (!error && vnode_vtype(vp) != VREG) { 2880 if (vnode_vtype(vp) == VDIR) 2881 error = NFSERR_ISDIR; 2882 else 2883 error = NFSERR_INVAL; 2884 } 2885 2886 if (error) { 2887 /* 2888 * If a client tries to confirm an Open with a bad 2889 * seqid# and there are no byte range locks or other Opens 2890 * on the openowner, just throw it away, so the next use of the 2891 * openowner will start a fresh seq#. 2892 */ 2893 if (error == NFSERR_BADSEQID && 2894 (new_stp->ls_flags & NFSLCK_CONFIRM) && 2895 nfsrv_nootherstate(stp)) 2896 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 2897 NFSUNLOCKSTATE(); 2898 return (error); 2899 } 2900 2901 /* 2902 * Set the return stateid. 2903 */ 2904 stateidp->seqid = stp->ls_stateid.seqid + 1; 2905 stateidp->other[0] = stp->ls_stateid.other[0]; 2906 stateidp->other[1] = stp->ls_stateid.other[1]; 2907 stateidp->other[2] = stp->ls_stateid.other[2]; 2908 /* 2909 * Now, handle the three cases. 2910 */ 2911 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 2912 /* 2913 * If the open doesn't need confirmation, it seems to me that 2914 * there is a client error, but I'll just log it and keep going? 2915 */ 2916 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 2917 printf("Nfsv4d: stray open confirm\n"); 2918 stp->ls_openowner->ls_flags = 0; 2919 stp->ls_stateid.seqid++; 2920 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 2921 clp->lc_flags |= LCL_STAMPEDSTABLE; 2922 len = clp->lc_idlen; 2923 NFSBCOPY(clp->lc_id, client, len); 2924 gotstate = 1; 2925 } 2926 NFSUNLOCKSTATE(); 2927 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 2928 ownerstp = stp->ls_openowner; 2929 lfp = stp->ls_lfp; 2930 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 2931 /* Get the lf lock */ 2932 nfsrv_locklf(lfp); 2933 NFSUNLOCKSTATE(); 2934 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 2935 NFSLOCKSTATE(); 2936 nfsrv_unlocklf(lfp); 2937 NFSUNLOCKSTATE(); 2938 } 2939 } else { 2940 (void) nfsrv_freeopen(stp, NULL, 0, p); 2941 NFSUNLOCKSTATE(); 2942 } 2943 } else { 2944 /* 2945 * Update the share bits, making sure that the new set are a 2946 * subset of the old ones. 2947 */ 2948 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 2949 if (~(stp->ls_flags) & bits) { 2950 NFSUNLOCKSTATE(); 2951 return (NFSERR_INVAL); 2952 } 2953 stp->ls_flags = (bits | NFSLCK_OPEN); 2954 stp->ls_stateid.seqid++; 2955 NFSUNLOCKSTATE(); 2956 } 2957 2958 /* 2959 * If the client just confirmed its first open, write a timestamp 2960 * to the stable storage file. 2961 */ 2962 if (gotstate) 2963 nfsrv_writestable(client, len, NFSNST_NEWSTATE, p); 2964 return (error); 2965 } 2966 2967 /* 2968 * Delegation update. Does the purge and return. 2969 */ 2970 APPLESTATIC int 2971 nfsrv_delegupdate(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2972 vnode_t vp, int op, struct ucred *cred, NFSPROC_T *p) 2973 { 2974 struct nfsstate *stp; 2975 struct nfsclient *clp; 2976 int error; 2977 fhandle_t fh; 2978 2979 /* 2980 * Do a sanity check against the file handle for DelegReturn. 2981 */ 2982 if (vp) { 2983 error = nfsvno_getfh(vp, &fh, p); 2984 if (error) 2985 return (error); 2986 } 2987 /* 2988 * Check for restart conditions (client and server). 2989 */ 2990 if (op == NFSV4OP_DELEGRETURN) 2991 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 2992 stateidp, 0); 2993 else 2994 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 2995 stateidp, 0); 2996 2997 NFSLOCKSTATE(); 2998 /* 2999 * Get the open structure via clientid and stateid. 3000 */ 3001 if (!error) 3002 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 3003 (nfsquad_t)((u_quad_t)0), NULL, p); 3004 if (error) { 3005 if (error == NFSERR_CBPATHDOWN) 3006 error = 0; 3007 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3008 error = NFSERR_STALESTATEID; 3009 } 3010 if (!error && op == NFSV4OP_DELEGRETURN) { 3011 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3012 if (!error && stp->ls_stateid.seqid != stateidp->seqid) 3013 error = NFSERR_OLDSTATEID; 3014 } 3015 /* 3016 * NFSERR_EXPIRED means that the state has gone away, 3017 * so Delegations have been purged. Just return ok. 3018 */ 3019 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3020 NFSUNLOCKSTATE(); 3021 return (0); 3022 } 3023 if (error) { 3024 NFSUNLOCKSTATE(); 3025 return (error); 3026 } 3027 3028 if (op == NFSV4OP_DELEGRETURN) { 3029 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3030 sizeof (fhandle_t))) { 3031 NFSUNLOCKSTATE(); 3032 return (NFSERR_BADSTATEID); 3033 } 3034 nfsrv_freedeleg(stp); 3035 } else { 3036 nfsrv_freedeleglist(&clp->lc_olddeleg); 3037 } 3038 NFSUNLOCKSTATE(); 3039 return (0); 3040 } 3041 3042 /* 3043 * Release lock owner. 3044 */ 3045 APPLESTATIC int 3046 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3047 NFSPROC_T *p) 3048 { 3049 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3050 struct nfsclient *clp; 3051 int error; 3052 3053 /* 3054 * Check for restart conditions (client and server). 3055 */ 3056 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3057 &new_stp->ls_stateid, 0); 3058 if (error) 3059 return (error); 3060 3061 NFSLOCKSTATE(); 3062 /* 3063 * Get the lock owner by name. 3064 */ 3065 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 3066 (nfsquad_t)((u_quad_t)0), NULL, p); 3067 if (error) { 3068 NFSUNLOCKSTATE(); 3069 return (error); 3070 } 3071 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3072 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3073 stp = LIST_FIRST(&openstp->ls_open); 3074 while (stp != LIST_END(&openstp->ls_open)) { 3075 nstp = LIST_NEXT(stp, ls_list); 3076 /* 3077 * If the owner matches, check for locks and 3078 * then free or return an error. 3079 */ 3080 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3081 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3082 stp->ls_ownerlen)){ 3083 if (LIST_EMPTY(&stp->ls_lock)) { 3084 nfsrv_freelockowner(stp, NULL, 0, p); 3085 } else { 3086 NFSUNLOCKSTATE(); 3087 return (NFSERR_LOCKSHELD); 3088 } 3089 } 3090 stp = nstp; 3091 } 3092 } 3093 } 3094 NFSUNLOCKSTATE(); 3095 return (0); 3096 } 3097 3098 /* 3099 * Get the file handle for a lock structure. 3100 */ 3101 static int 3102 nfsrv_getlockfh(vnode_t vp, u_short flags, 3103 struct nfslockfile **new_lfpp, fhandle_t *nfhp, NFSPROC_T *p) 3104 { 3105 fhandle_t *fhp = NULL; 3106 struct nfslockfile *new_lfp; 3107 int error; 3108 3109 /* 3110 * For lock, use the new nfslock structure, otherwise just 3111 * a fhandle_t on the stack. 3112 */ 3113 if (flags & NFSLCK_OPEN) { 3114 new_lfp = *new_lfpp; 3115 fhp = &new_lfp->lf_fh; 3116 } else if (nfhp) { 3117 fhp = nfhp; 3118 } else { 3119 panic("nfsrv_getlockfh"); 3120 } 3121 error = nfsvno_getfh(vp, fhp, p); 3122 return (error); 3123 } 3124 3125 /* 3126 * Get an nfs lock structure. Allocate one, as required, and return a 3127 * pointer to it. 3128 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3129 */ 3130 static int 3131 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3132 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3133 { 3134 struct nfslockfile *lfp; 3135 fhandle_t *fhp = NULL, *tfhp; 3136 struct nfslockhashhead *hp; 3137 struct nfslockfile *new_lfp = NULL; 3138 3139 /* 3140 * For lock, use the new nfslock structure, otherwise just 3141 * a fhandle_t on the stack. 3142 */ 3143 if (flags & NFSLCK_OPEN) { 3144 new_lfp = *new_lfpp; 3145 fhp = &new_lfp->lf_fh; 3146 } else if (nfhp) { 3147 fhp = nfhp; 3148 } else { 3149 panic("nfsrv_getlockfile"); 3150 } 3151 3152 hp = NFSLOCKHASH(fhp); 3153 LIST_FOREACH(lfp, hp, lf_hash) { 3154 tfhp = &lfp->lf_fh; 3155 if (NFSVNO_CMPFH(fhp, tfhp)) { 3156 if (lockit) 3157 nfsrv_locklf(lfp); 3158 *lfpp = lfp; 3159 return (0); 3160 } 3161 } 3162 if (!(flags & NFSLCK_OPEN)) 3163 return (-1); 3164 3165 /* 3166 * No match, so chain the new one into the list. 3167 */ 3168 LIST_INIT(&new_lfp->lf_open); 3169 LIST_INIT(&new_lfp->lf_lock); 3170 LIST_INIT(&new_lfp->lf_deleg); 3171 LIST_INIT(&new_lfp->lf_locallock); 3172 LIST_INIT(&new_lfp->lf_rollback); 3173 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3174 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3175 new_lfp->lf_usecount = 0; 3176 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3177 *lfpp = new_lfp; 3178 *new_lfpp = NULL; 3179 return (0); 3180 } 3181 3182 /* 3183 * This function adds a nfslock lock structure to the list for the associated 3184 * nfsstate and nfslockfile structures. It will be inserted after the 3185 * entry pointed at by insert_lop. 3186 */ 3187 static void 3188 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3189 struct nfsstate *stp, struct nfslockfile *lfp) 3190 { 3191 struct nfslock *lop, *nlop; 3192 3193 new_lop->lo_stp = stp; 3194 new_lop->lo_lfp = lfp; 3195 3196 if (stp != NULL) { 3197 /* Insert in increasing lo_first order */ 3198 lop = LIST_FIRST(&lfp->lf_lock); 3199 if (lop == LIST_END(&lfp->lf_lock) || 3200 new_lop->lo_first <= lop->lo_first) { 3201 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3202 } else { 3203 nlop = LIST_NEXT(lop, lo_lckfile); 3204 while (nlop != LIST_END(&lfp->lf_lock) && 3205 nlop->lo_first < new_lop->lo_first) { 3206 lop = nlop; 3207 nlop = LIST_NEXT(lop, lo_lckfile); 3208 } 3209 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3210 } 3211 } else { 3212 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3213 } 3214 3215 /* 3216 * Insert after insert_lop, which is overloaded as stp or lfp for 3217 * an empty list. 3218 */ 3219 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3220 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3221 else if ((struct nfsstate *)insert_lop == stp) 3222 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3223 else 3224 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3225 if (stp != NULL) { 3226 newnfsstats.srvlocks++; 3227 nfsrv_openpluslock++; 3228 } 3229 } 3230 3231 /* 3232 * This function updates the locking for a lock owner and given file. It 3233 * maintains a list of lock ranges ordered on increasing file offset that 3234 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3235 * It always adds new_lop to the list and sometimes uses the one pointed 3236 * at by other_lopp. 3237 */ 3238 static void 3239 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3240 struct nfslock **other_lopp, struct nfslockfile *lfp) 3241 { 3242 struct nfslock *new_lop = *new_lopp; 3243 struct nfslock *lop, *tlop, *ilop; 3244 struct nfslock *other_lop = *other_lopp; 3245 int unlock = 0, myfile = 0; 3246 u_int64_t tmp; 3247 3248 /* 3249 * Work down the list until the lock is merged. 3250 */ 3251 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3252 unlock = 1; 3253 if (stp != NULL) { 3254 ilop = (struct nfslock *)stp; 3255 lop = LIST_FIRST(&stp->ls_lock); 3256 } else { 3257 ilop = (struct nfslock *)lfp; 3258 lop = LIST_FIRST(&lfp->lf_locallock); 3259 } 3260 while (lop != NULL) { 3261 /* 3262 * Only check locks for this file that aren't before the start of 3263 * new lock's range. 3264 */ 3265 if (lop->lo_lfp == lfp) { 3266 myfile = 1; 3267 if (lop->lo_end >= new_lop->lo_first) { 3268 if (new_lop->lo_end < lop->lo_first) { 3269 /* 3270 * If the new lock ends before the start of the 3271 * current lock's range, no merge, just insert 3272 * the new lock. 3273 */ 3274 break; 3275 } 3276 if (new_lop->lo_flags == lop->lo_flags || 3277 (new_lop->lo_first <= lop->lo_first && 3278 new_lop->lo_end >= lop->lo_end)) { 3279 /* 3280 * This lock can be absorbed by the new lock/unlock. 3281 * This happens when it covers the entire range 3282 * of the old lock or is contiguous 3283 * with the old lock and is of the same type or an 3284 * unlock. 3285 */ 3286 if (lop->lo_first < new_lop->lo_first) 3287 new_lop->lo_first = lop->lo_first; 3288 if (lop->lo_end > new_lop->lo_end) 3289 new_lop->lo_end = lop->lo_end; 3290 tlop = lop; 3291 lop = LIST_NEXT(lop, lo_lckowner); 3292 nfsrv_freenfslock(tlop); 3293 continue; 3294 } 3295 3296 /* 3297 * All these cases are for contiguous locks that are not the 3298 * same type, so they can't be merged. 3299 */ 3300 if (new_lop->lo_first <= lop->lo_first) { 3301 /* 3302 * This case is where the new lock overlaps with the 3303 * first part of the old lock. Move the start of the 3304 * old lock to just past the end of the new lock. The 3305 * new lock will be inserted in front of the old, since 3306 * ilop hasn't been updated. (We are done now.) 3307 */ 3308 lop->lo_first = new_lop->lo_end; 3309 break; 3310 } 3311 if (new_lop->lo_end >= lop->lo_end) { 3312 /* 3313 * This case is where the new lock overlaps with the 3314 * end of the old lock's range. Move the old lock's 3315 * end to just before the new lock's first and insert 3316 * the new lock after the old lock. 3317 * Might not be done yet, since the new lock could 3318 * overlap further locks with higher ranges. 3319 */ 3320 lop->lo_end = new_lop->lo_first; 3321 ilop = lop; 3322 lop = LIST_NEXT(lop, lo_lckowner); 3323 continue; 3324 } 3325 /* 3326 * The final case is where the new lock's range is in the 3327 * middle of the current lock's and splits the current lock 3328 * up. Use *other_lopp to handle the second part of the 3329 * split old lock range. (We are done now.) 3330 * For unlock, we use new_lop as other_lop and tmp, since 3331 * other_lop and new_lop are the same for this case. 3332 * We noted the unlock case above, so we don't need 3333 * new_lop->lo_flags any longer. 3334 */ 3335 tmp = new_lop->lo_first; 3336 if (other_lop == NULL) { 3337 if (!unlock) 3338 panic("nfsd srv update unlock"); 3339 other_lop = new_lop; 3340 *new_lopp = NULL; 3341 } 3342 other_lop->lo_first = new_lop->lo_end; 3343 other_lop->lo_end = lop->lo_end; 3344 other_lop->lo_flags = lop->lo_flags; 3345 other_lop->lo_stp = stp; 3346 other_lop->lo_lfp = lfp; 3347 lop->lo_end = tmp; 3348 nfsrv_insertlock(other_lop, lop, stp, lfp); 3349 *other_lopp = NULL; 3350 ilop = lop; 3351 break; 3352 } 3353 } 3354 ilop = lop; 3355 lop = LIST_NEXT(lop, lo_lckowner); 3356 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3357 break; 3358 } 3359 3360 /* 3361 * Insert the new lock in the list at the appropriate place. 3362 */ 3363 if (!unlock) { 3364 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3365 *new_lopp = NULL; 3366 } 3367 } 3368 3369 /* 3370 * This function handles sequencing of locks, etc. 3371 * It returns an error that indicates what the caller should do. 3372 */ 3373 static int 3374 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3375 struct nfsstate *stp, struct nfsrvcache *op) 3376 { 3377 3378 if (op != nd->nd_rp) 3379 panic("nfsrvstate checkseqid"); 3380 if (!(op->rc_flag & RC_INPROG)) 3381 panic("nfsrvstate not inprog"); 3382 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3383 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3384 panic("nfsrvstate op refcnt"); 3385 } 3386 if ((stp->ls_seq + 1) == seqid) { 3387 if (stp->ls_op) 3388 nfsrvd_derefcache(stp->ls_op); 3389 stp->ls_op = op; 3390 nfsrvd_refcache(op); 3391 stp->ls_seq = seqid; 3392 return (0); 3393 } else if (stp->ls_seq == seqid && stp->ls_op && 3394 op->rc_xid == stp->ls_op->rc_xid && 3395 op->rc_refcnt == 0 && 3396 op->rc_reqlen == stp->ls_op->rc_reqlen && 3397 op->rc_cksum == stp->ls_op->rc_cksum) { 3398 if (stp->ls_op->rc_flag & RC_INPROG) 3399 return (NFSERR_DONTREPLY); 3400 nd->nd_rp = stp->ls_op; 3401 nd->nd_rp->rc_flag |= RC_INPROG; 3402 nfsrvd_delcache(op); 3403 return (NFSERR_REPLYFROMCACHE); 3404 } 3405 return (NFSERR_BADSEQID); 3406 } 3407 3408 /* 3409 * Get the client ip address for callbacks. If the strings can't be parsed, 3410 * just set lc_program to 0 to indicate no callbacks are possible. 3411 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3412 * the address to the client's transport address. This won't be used 3413 * for callbacks, but can be printed out by newnfsstats for info.) 3414 * Return error if the xdr can't be parsed, 0 otherwise. 3415 */ 3416 APPLESTATIC int 3417 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3418 { 3419 u_int32_t *tl; 3420 u_char *cp, *cp2; 3421 int i, j; 3422 struct sockaddr_in *rad, *sad; 3423 u_char protocol[5], addr[24]; 3424 int error = 0, cantparse = 0; 3425 union { 3426 u_long ival; 3427 u_char cval[4]; 3428 } ip; 3429 union { 3430 u_short sval; 3431 u_char cval[2]; 3432 } port; 3433 3434 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 3435 rad->sin_family = AF_INET; 3436 rad->sin_len = sizeof (struct sockaddr_in); 3437 rad->sin_addr.s_addr = 0; 3438 rad->sin_port = 0; 3439 clp->lc_req.nr_client = NULL; 3440 clp->lc_req.nr_lock = 0; 3441 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3442 i = fxdr_unsigned(int, *tl); 3443 if (i >= 3 && i <= 4) { 3444 error = nfsrv_mtostr(nd, protocol, i); 3445 if (error) 3446 goto nfsmout; 3447 if (!strcmp(protocol, "tcp")) { 3448 clp->lc_flags |= LCL_TCPCALLBACK; 3449 clp->lc_req.nr_sotype = SOCK_STREAM; 3450 clp->lc_req.nr_soproto = IPPROTO_TCP; 3451 } else if (!strcmp(protocol, "udp")) { 3452 clp->lc_req.nr_sotype = SOCK_DGRAM; 3453 clp->lc_req.nr_soproto = IPPROTO_UDP; 3454 } else { 3455 cantparse = 1; 3456 } 3457 } else { 3458 cantparse = 1; 3459 if (i > 0) { 3460 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3461 if (error) 3462 goto nfsmout; 3463 } 3464 } 3465 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3466 i = fxdr_unsigned(int, *tl); 3467 if (i < 0) { 3468 error = NFSERR_BADXDR; 3469 goto nfsmout; 3470 } else if (i == 0) { 3471 cantparse = 1; 3472 } else if (!cantparse && i <= 23 && i >= 11) { 3473 error = nfsrv_mtostr(nd, addr, i); 3474 if (error) 3475 goto nfsmout; 3476 3477 /* 3478 * Parse out the address fields. We expect 6 decimal numbers 3479 * separated by '.'s. 3480 */ 3481 cp = addr; 3482 i = 0; 3483 while (*cp && i < 6) { 3484 cp2 = cp; 3485 while (*cp2 && *cp2 != '.') 3486 cp2++; 3487 if (*cp2) 3488 *cp2++ = '\0'; 3489 else if (i != 5) { 3490 cantparse = 1; 3491 break; 3492 } 3493 j = nfsrv_getipnumber(cp); 3494 if (j >= 0) { 3495 if (i < 4) 3496 ip.cval[3 - i] = j; 3497 else 3498 port.cval[5 - i] = j; 3499 } else { 3500 cantparse = 1; 3501 break; 3502 } 3503 cp = cp2; 3504 i++; 3505 } 3506 if (!cantparse) { 3507 if (ip.ival != 0x0) { 3508 rad->sin_addr.s_addr = htonl(ip.ival); 3509 rad->sin_port = htons(port.sval); 3510 } else { 3511 cantparse = 1; 3512 } 3513 } 3514 } else { 3515 cantparse = 1; 3516 if (i > 0) { 3517 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3518 if (error) 3519 goto nfsmout; 3520 } 3521 } 3522 if (cantparse) { 3523 sad = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3524 rad->sin_addr.s_addr = sad->sin_addr.s_addr; 3525 rad->sin_port = 0x0; 3526 clp->lc_program = 0; 3527 } 3528 nfsmout: 3529 return (error); 3530 } 3531 3532 /* 3533 * Turn a string of up to three decimal digits into a number. Return -1 upon 3534 * error. 3535 */ 3536 static int 3537 nfsrv_getipnumber(u_char *cp) 3538 { 3539 int i = 0, j = 0; 3540 3541 while (*cp) { 3542 if (j > 2 || *cp < '0' || *cp > '9') 3543 return (-1); 3544 i *= 10; 3545 i += (*cp - '0'); 3546 cp++; 3547 j++; 3548 } 3549 if (i < 256) 3550 return (i); 3551 return (-1); 3552 } 3553 3554 /* 3555 * This function checks for restart conditions. 3556 */ 3557 static int 3558 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 3559 nfsv4stateid_t *stateidp, int specialid) 3560 { 3561 int ret; 3562 3563 /* 3564 * First check for a server restart. Open, LockT, ReleaseLockOwner 3565 * and DelegPurge have a clientid, the rest a stateid. 3566 */ 3567 if (flags & 3568 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 3569 if (clientid.lval[0] != nfsrvboottime) 3570 return (NFSERR_STALECLIENTID); 3571 } else if (stateidp->other[0] != nfsrvboottime && 3572 specialid == 0) 3573 return (NFSERR_STALESTATEID); 3574 3575 /* 3576 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 3577 * not use a lock/open owner seqid#, so the check can be done now. 3578 * (The others will be checked, as required, later.) 3579 */ 3580 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 3581 return (0); 3582 3583 NFSLOCKSTATE(); 3584 ret = nfsrv_checkgrace(flags); 3585 NFSUNLOCKSTATE(); 3586 return (ret); 3587 } 3588 3589 /* 3590 * Check for grace. 3591 */ 3592 static int 3593 nfsrv_checkgrace(u_int32_t flags) 3594 { 3595 3596 if (nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) { 3597 if (flags & NFSLCK_RECLAIM) 3598 return (NFSERR_NOGRACE); 3599 } else { 3600 if (!(flags & NFSLCK_RECLAIM)) 3601 return (NFSERR_GRACE); 3602 3603 /* 3604 * If grace is almost over and we are still getting Reclaims, 3605 * extend grace a bit. 3606 */ 3607 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 3608 nfsrv_stablefirst.nsf_eograce) 3609 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 3610 NFSRV_LEASEDELTA; 3611 } 3612 return (0); 3613 } 3614 3615 /* 3616 * Do a server callback. 3617 */ 3618 static int 3619 nfsrv_docallback(struct nfsclient *clp, int procnum, 3620 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 3621 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 3622 { 3623 mbuf_t m; 3624 u_int32_t *tl; 3625 struct nfsrv_descript nfsd, *nd = &nfsd; 3626 struct ucred *cred; 3627 int error = 0; 3628 u_int32_t callback; 3629 3630 cred = newnfs_getcred(); 3631 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 3632 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 3633 NFSUNLOCKSTATE(); 3634 panic("docallb"); 3635 } 3636 clp->lc_cbref++; 3637 3638 /* 3639 * Fill the callback program# and version into the request 3640 * structure for newnfs_connect() to use. 3641 */ 3642 clp->lc_req.nr_prog = clp->lc_program; 3643 clp->lc_req.nr_vers = NFSV4_CBVERS; 3644 3645 /* 3646 * First, fill in some of the fields of nd and cr. 3647 */ 3648 nd->nd_flag = ND_NFSV4; 3649 if (clp->lc_flags & LCL_GSS) 3650 nd->nd_flag |= ND_KERBV; 3651 nd->nd_repstat = 0; 3652 cred->cr_uid = clp->lc_uid; 3653 cred->cr_gid = clp->lc_gid; 3654 callback = clp->lc_callback; 3655 NFSUNLOCKSTATE(); 3656 cred->cr_ngroups = 1; 3657 3658 /* 3659 * Get the first mbuf for the request. 3660 */ 3661 MGET(m, M_WAIT, MT_DATA); 3662 mbuf_setlen(m, 0); 3663 nd->nd_mreq = nd->nd_mb = m; 3664 nd->nd_bpos = NFSMTOD(m, caddr_t); 3665 3666 /* 3667 * and build the callback request. 3668 */ 3669 if (procnum == NFSV4OP_CBGETATTR) { 3670 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 3671 (void) nfsm_strtom(nd, "CB Getattr", 10); 3672 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3673 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 3674 *tl++ = txdr_unsigned(callback); 3675 *tl++ = txdr_unsigned(1); 3676 *tl = txdr_unsigned(NFSV4OP_CBGETATTR); 3677 (void) nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 3678 (void) nfsrv_putattrbit(nd, attrbitp); 3679 } else if (procnum == NFSV4OP_CBRECALL) { 3680 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 3681 (void) nfsm_strtom(nd, "CB Recall", 9); 3682 NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED + NFSX_STATEID); 3683 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 3684 *tl++ = txdr_unsigned(callback); 3685 *tl++ = txdr_unsigned(1); 3686 *tl++ = txdr_unsigned(NFSV4OP_CBRECALL); 3687 *tl++ = txdr_unsigned(stateidp->seqid); 3688 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 3689 NFSX_STATEIDOTHER); 3690 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3691 if (trunc) 3692 *tl = newnfs_true; 3693 else 3694 *tl = newnfs_false; 3695 (void) nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 3696 } else { 3697 nd->nd_procnum = NFSV4PROC_CBNULL; 3698 } 3699 3700 /* 3701 * Call newnfs_connect(), as required, and then newnfs_request(). 3702 */ 3703 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 3704 if (clp->lc_req.nr_client == NULL) { 3705 if (nd->nd_procnum == NFSV4PROC_CBNULL) 3706 error = newnfs_connect(NULL, &clp->lc_req, cred, 3707 NULL, 1); 3708 else 3709 error = newnfs_connect(NULL, &clp->lc_req, cred, 3710 NULL, 3); 3711 } 3712 newnfs_sndunlock(&clp->lc_req.nr_lock); 3713 if (!error) { 3714 error = newnfs_request(nd, NULL, clp, &clp->lc_req, NULL, 3715 NULL, cred, clp->lc_program, NFSV4_CBVERS, NULL, 1, NULL); 3716 } 3717 NFSFREECRED(cred); 3718 3719 /* 3720 * If error is set here, the Callback path isn't working 3721 * properly, so twiddle the appropriate LCL_ flags. 3722 * (nd_repstat != 0 indicates the Callback path is working, 3723 * but the callback failed on the client.) 3724 */ 3725 if (error) { 3726 /* 3727 * Mark the callback pathway down, which disabled issuing 3728 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 3729 */ 3730 NFSLOCKSTATE(); 3731 clp->lc_flags |= LCL_CBDOWN; 3732 NFSUNLOCKSTATE(); 3733 } else { 3734 /* 3735 * Callback worked. If the callback path was down, disable 3736 * callbacks, so no more delegations will be issued. (This 3737 * is done on the assumption that the callback pathway is 3738 * flakey.) 3739 */ 3740 NFSLOCKSTATE(); 3741 if (clp->lc_flags & LCL_CBDOWN) 3742 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 3743 NFSUNLOCKSTATE(); 3744 if (nd->nd_repstat) 3745 error = nd->nd_repstat; 3746 else if (procnum == NFSV4OP_CBGETATTR) 3747 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 3748 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 3749 p, NULL); 3750 mbuf_freem(nd->nd_mrep); 3751 } 3752 NFSLOCKSTATE(); 3753 clp->lc_cbref--; 3754 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 3755 clp->lc_flags &= ~LCL_WAKEUPWANTED; 3756 NFSUNLOCKSTATE(); 3757 wakeup((caddr_t)clp); 3758 } else { 3759 NFSUNLOCKSTATE(); 3760 } 3761 return (error); 3762 } 3763 3764 /* 3765 * Return the next index# for a clientid. Mostly just increment and return 3766 * the next one, but... if the 32bit unsigned does actually wrap around, 3767 * it should be rebooted. 3768 * At an average rate of one new client per second, it will wrap around in 3769 * approximately 136 years. (I think the server will have been shut 3770 * down or rebooted before then.) 3771 */ 3772 static u_int32_t 3773 nfsrv_nextclientindex(void) 3774 { 3775 static u_int32_t client_index = 0; 3776 3777 client_index++; 3778 if (client_index != 0) 3779 return (client_index); 3780 3781 printf("%s: out of clientids\n", __func__); 3782 return (client_index); 3783 } 3784 3785 /* 3786 * Return the next index# for a stateid. Mostly just increment and return 3787 * the next one, but... if the 32bit unsigned does actually wrap around 3788 * (will a BSD server stay up that long?), find 3789 * new start and end values. 3790 */ 3791 static u_int32_t 3792 nfsrv_nextstateindex(struct nfsclient *clp) 3793 { 3794 struct nfsstate *stp; 3795 int i; 3796 u_int32_t canuse, min_index, max_index; 3797 3798 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 3799 clp->lc_stateindex++; 3800 if (clp->lc_stateindex != clp->lc_statemaxindex) 3801 return (clp->lc_stateindex); 3802 } 3803 3804 /* 3805 * Yuck, we've hit the end. 3806 * Look for a new min and max. 3807 */ 3808 min_index = 0; 3809 max_index = 0xffffffff; 3810 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 3811 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 3812 if (stp->ls_stateid.other[2] > 0x80000000) { 3813 if (stp->ls_stateid.other[2] < max_index) 3814 max_index = stp->ls_stateid.other[2]; 3815 } else { 3816 if (stp->ls_stateid.other[2] > min_index) 3817 min_index = stp->ls_stateid.other[2]; 3818 } 3819 } 3820 } 3821 3822 /* 3823 * Yikes, highly unlikely, but I'll handle it anyhow. 3824 */ 3825 if (min_index == 0x80000000 && max_index == 0x80000001) { 3826 canuse = 0; 3827 /* 3828 * Loop around until we find an unused entry. Return that 3829 * and set LCL_INDEXNOTOK, so the search will continue next time. 3830 * (This is one of those rare cases where a goto is the 3831 * cleanest way to code the loop.) 3832 */ 3833 tryagain: 3834 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 3835 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 3836 if (stp->ls_stateid.other[2] == canuse) { 3837 canuse++; 3838 goto tryagain; 3839 } 3840 } 3841 } 3842 clp->lc_flags |= LCL_INDEXNOTOK; 3843 return (canuse); 3844 } 3845 3846 /* 3847 * Ok to start again from min + 1. 3848 */ 3849 clp->lc_stateindex = min_index + 1; 3850 clp->lc_statemaxindex = max_index; 3851 clp->lc_flags &= ~LCL_INDEXNOTOK; 3852 return (clp->lc_stateindex); 3853 } 3854 3855 /* 3856 * The following functions handle the stable storage file that deals with 3857 * the edge conditions described in RFC3530 Sec. 8.6.3. 3858 * The file is as follows: 3859 * - a single record at the beginning that has the lease time of the 3860 * previous server instance (before the last reboot) and the nfsrvboottime 3861 * values for the previous server boots. 3862 * These previous boot times are used to ensure that the current 3863 * nfsrvboottime does not, somehow, get set to a previous one. 3864 * (This is important so that Stale ClientIDs and StateIDs can 3865 * be recognized.) 3866 * The number of previous nfsvrboottime values preceeds the list. 3867 * - followed by some number of appended records with: 3868 * - client id string 3869 * - flag that indicates it is a record revoking state via lease 3870 * expiration or similar 3871 * OR has successfully acquired state. 3872 * These structures vary in length, with the client string at the end, up 3873 * to NFSV4_OPAQUELIMIT in size. 3874 * 3875 * At the end of the grace period, the file is truncated, the first 3876 * record is rewritten with updated information and any acquired state 3877 * records for successful reclaims of state are written. 3878 * 3879 * Subsequent records are appended when the first state is issued to 3880 * a client and when state is revoked for a client. 3881 * 3882 * When reading the file in, state issued records that come later in 3883 * the file override older ones, since the append log is in cronological order. 3884 * If, for some reason, the file can't be read, the grace period is 3885 * immediately terminated and all reclaims get NFSERR_NOGRACE. 3886 */ 3887 3888 /* 3889 * Read in the stable storage file. Called by nfssvc() before the nfsd 3890 * processes start servicing requests. 3891 */ 3892 APPLESTATIC void 3893 nfsrv_setupstable(NFSPROC_T *p) 3894 { 3895 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 3896 struct nfsrv_stable *sp, *nsp; 3897 struct nfst_rec *tsp; 3898 int error, i, tryagain; 3899 off_t off = 0; 3900 int aresid, len; 3901 struct timeval curtime; 3902 3903 /* 3904 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 3905 * a reboot, so state has not been lost. 3906 */ 3907 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 3908 return; 3909 /* 3910 * Set Grace over just until the file reads successfully. 3911 */ 3912 NFSGETTIME(&curtime); 3913 nfsrvboottime = curtime.tv_sec; 3914 LIST_INIT(&sf->nsf_head); 3915 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 3916 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 3917 if (sf->nsf_fp == NULL) 3918 return; 3919 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 3920 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 3921 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 3922 if (error || aresid || sf->nsf_numboots == 0 || 3923 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 3924 return; 3925 3926 /* 3927 * Now, read in the boottimes. 3928 */ 3929 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 3930 sizeof (time_t), M_TEMP, M_WAITOK); 3931 off = sizeof (struct nfsf_rec); 3932 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 3933 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 3934 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 3935 if (error || aresid) { 3936 free((caddr_t)sf->nsf_bootvals, M_TEMP); 3937 sf->nsf_bootvals = NULL; 3938 return; 3939 } 3940 3941 /* 3942 * Make sure this nfsrvboottime is different from all recorded 3943 * previous ones. 3944 */ 3945 do { 3946 tryagain = 0; 3947 for (i = 0; i < sf->nsf_numboots; i++) { 3948 if (nfsrvboottime == sf->nsf_bootvals[i]) { 3949 nfsrvboottime++; 3950 tryagain = 1; 3951 break; 3952 } 3953 } 3954 } while (tryagain); 3955 3956 sf->nsf_flags |= NFSNSF_OK; 3957 off += (sf->nsf_numboots * sizeof (time_t)); 3958 3959 /* 3960 * Read through the file, building a list of records for grace 3961 * checking. 3962 * Each record is between sizeof (struct nfst_rec) and 3963 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 3964 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 3965 */ 3966 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 3967 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 3968 do { 3969 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 3970 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 3971 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 3972 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 3973 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 3974 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 3975 /* 3976 * Yuck, the file has been corrupted, so just return 3977 * after clearing out any restart state, so the grace period 3978 * is over. 3979 */ 3980 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 3981 LIST_REMOVE(sp, nst_list); 3982 free((caddr_t)sp, M_TEMP); 3983 } 3984 free((caddr_t)tsp, M_TEMP); 3985 sf->nsf_flags &= ~NFSNSF_OK; 3986 free((caddr_t)sf->nsf_bootvals, M_TEMP); 3987 sf->nsf_bootvals = NULL; 3988 return; 3989 } 3990 if (len > 0) { 3991 off += sizeof (struct nfst_rec) + tsp->len - 1; 3992 /* 3993 * Search the list for a matching client. 3994 */ 3995 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 3996 if (tsp->len == sp->nst_len && 3997 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 3998 break; 3999 } 4000 if (sp == LIST_END(&sf->nsf_head)) { 4001 sp = (struct nfsrv_stable *)malloc(tsp->len + 4002 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4003 M_WAITOK); 4004 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4005 sizeof (struct nfst_rec) + tsp->len - 1); 4006 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4007 } else { 4008 if (tsp->flag == NFSNST_REVOKE) 4009 sp->nst_flag |= NFSNST_REVOKE; 4010 else 4011 /* 4012 * A subsequent timestamp indicates the client 4013 * did a setclientid/confirm and any previous 4014 * revoke is no longer relevant. 4015 */ 4016 sp->nst_flag &= ~NFSNST_REVOKE; 4017 } 4018 } 4019 } while (len > 0); 4020 free((caddr_t)tsp, M_TEMP); 4021 sf->nsf_flags = NFSNSF_OK; 4022 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4023 NFSRV_LEASEDELTA; 4024 } 4025 4026 /* 4027 * Update the stable storage file, now that the grace period is over. 4028 */ 4029 APPLESTATIC void 4030 nfsrv_updatestable(NFSPROC_T *p) 4031 { 4032 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4033 struct nfsrv_stable *sp, *nsp; 4034 int i; 4035 struct nfsvattr nva; 4036 vnode_t vp; 4037 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4038 mount_t mp = NULL; 4039 #endif 4040 int error; 4041 4042 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4043 return; 4044 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4045 /* 4046 * Ok, we need to rewrite the stable storage file. 4047 * - truncate to 0 length 4048 * - write the new first structure 4049 * - loop through the data structures, writing out any that 4050 * have timestamps older than the old boot 4051 */ 4052 if (sf->nsf_bootvals) { 4053 sf->nsf_numboots++; 4054 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4055 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4056 } else { 4057 sf->nsf_numboots = 1; 4058 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4059 M_TEMP, M_WAITOK); 4060 } 4061 sf->nsf_bootvals[0] = nfsrvboottime; 4062 sf->nsf_lease = nfsrv_lease; 4063 NFSVNO_ATTRINIT(&nva); 4064 NFSVNO_SETATTRVAL(&nva, size, 0); 4065 vp = NFSFPVNODE(sf->nsf_fp); 4066 NFS_STARTWRITE(vp, &mp); 4067 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 4068 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, NULL); 4069 NFS_ENDWRITE(mp); 4070 NFSVOPUNLOCK(vp, 0, p); 4071 if (!error) 4072 error = NFSD_RDWR(UIO_WRITE, vp, 4073 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4074 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4075 if (!error) 4076 error = NFSD_RDWR(UIO_WRITE, vp, 4077 (caddr_t)sf->nsf_bootvals, 4078 sf->nsf_numboots * sizeof (time_t), 4079 (off_t)(sizeof (struct nfsf_rec)), 4080 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4081 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4082 sf->nsf_bootvals = NULL; 4083 if (error) { 4084 sf->nsf_flags &= ~NFSNSF_OK; 4085 printf("EEK! Can't write NfsV4 stable storage file\n"); 4086 return; 4087 } 4088 sf->nsf_flags |= NFSNSF_OK; 4089 4090 /* 4091 * Loop through the list and write out timestamp records for 4092 * any clients that successfully reclaimed state. 4093 */ 4094 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4095 if (sp->nst_flag & NFSNST_GOTSTATE) { 4096 nfsrv_writestable(sp->nst_client, sp->nst_len, 4097 NFSNST_NEWSTATE, p); 4098 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4099 } 4100 LIST_REMOVE(sp, nst_list); 4101 free((caddr_t)sp, M_TEMP); 4102 } 4103 } 4104 4105 /* 4106 * Append a record to the stable storage file. 4107 */ 4108 APPLESTATIC void 4109 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4110 { 4111 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4112 struct nfst_rec *sp; 4113 int error; 4114 4115 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4116 return; 4117 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4118 len - 1, M_TEMP, M_WAITOK); 4119 sp->len = len; 4120 NFSBCOPY(client, sp->client, len); 4121 sp->flag = flag; 4122 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 4123 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 4124 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 4125 free((caddr_t)sp, M_TEMP); 4126 if (error) { 4127 sf->nsf_flags &= ~NFSNSF_OK; 4128 printf("EEK! Can't write NfsV4 stable storage file\n"); 4129 } 4130 } 4131 4132 /* 4133 * This function is called during the grace period to mark a client 4134 * that successfully reclaimed state. 4135 */ 4136 static void 4137 nfsrv_markstable(struct nfsclient *clp) 4138 { 4139 struct nfsrv_stable *sp; 4140 4141 /* 4142 * First find the client structure. 4143 */ 4144 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4145 if (sp->nst_len == clp->lc_idlen && 4146 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4147 break; 4148 } 4149 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4150 return; 4151 4152 /* 4153 * Now, just mark it and set the nfsclient back pointer. 4154 */ 4155 sp->nst_flag |= NFSNST_GOTSTATE; 4156 sp->nst_clp = clp; 4157 } 4158 4159 /* 4160 * This function is called for a reclaim, to see if it gets grace. 4161 * It returns 0 if a reclaim is allowed, 1 otherwise. 4162 */ 4163 static int 4164 nfsrv_checkstable(struct nfsclient *clp) 4165 { 4166 struct nfsrv_stable *sp; 4167 4168 /* 4169 * First, find the entry for the client. 4170 */ 4171 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4172 if (sp->nst_len == clp->lc_idlen && 4173 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4174 break; 4175 } 4176 4177 /* 4178 * If not in the list, state was revoked or no state was issued 4179 * since the previous reboot, a reclaim is denied. 4180 */ 4181 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 4182 (sp->nst_flag & NFSNST_REVOKE) || 4183 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 4184 return (1); 4185 return (0); 4186 } 4187 4188 /* 4189 * Test for and try to clear out a conflicting client. This is called by 4190 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 4191 * a found. 4192 * The trick here is that it can't revoke a conflicting client with an 4193 * expired lease unless it holds the v4root lock, so... 4194 * If no v4root lock, get the lock and return 1 to indicate "try again". 4195 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 4196 * the revocation worked and the conflicting client is "bye, bye", so it 4197 * can be tried again. 4198 * Unlocks State before a non-zero value is returned. 4199 */ 4200 static int 4201 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, __unused vnode_t vp, 4202 NFSPROC_T *p) 4203 { 4204 int gotlock; 4205 4206 /* 4207 * If lease hasn't expired, we can't fix it. 4208 */ 4209 if (clp->lc_expiry >= NFSD_MONOSEC || 4210 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 4211 return (0); 4212 if (*haslockp == 0) { 4213 NFSUNLOCKSTATE(); 4214 NFSVOPUNLOCK(vp, 0, p); 4215 NFSLOCKV4ROOTMUTEX(); 4216 nfsv4_relref(&nfsv4rootfs_lock); 4217 do { 4218 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4219 NFSV4ROOTLOCKMUTEXPTR); 4220 } while (!gotlock); 4221 NFSUNLOCKV4ROOTMUTEX(); 4222 *haslockp = 1; 4223 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 4224 return (1); 4225 } 4226 NFSUNLOCKSTATE(); 4227 4228 /* 4229 * Ok, we can expire the conflicting client. 4230 */ 4231 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4232 nfsrv_cleanclient(clp, p); 4233 nfsrv_freedeleglist(&clp->lc_deleg); 4234 nfsrv_freedeleglist(&clp->lc_olddeleg); 4235 LIST_REMOVE(clp, lc_hash); 4236 nfsrv_zapclient(clp, p); 4237 return (1); 4238 } 4239 4240 4241 /* 4242 * Resolve a delegation conflict. 4243 * Returns 0 to indicate the conflict was resolved without sleeping. 4244 * Return -1 to indicate that the caller should check for conflicts again. 4245 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 4246 * 4247 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 4248 * for a return of 0, since there was no sleep and it could be required 4249 * later. It is released for a return of NFSERR_DELAY, since the caller 4250 * will return that error. It is released when a sleep was done waiting 4251 * for the delegation to be returned or expire (so that other nfsds can 4252 * handle ops). Then, it must be acquired for the write to stable storage. 4253 * (This function is somewhat similar to nfsrv_clientconflict(), but 4254 * the semantics differ in a couple of subtle ways. The return of 0 4255 * indicates the conflict was resolved without sleeping here, not 4256 * that the conflict can't be resolved and the handling of nfsv4root_lock 4257 * differs, as noted above.) 4258 * Unlocks State before returning a non-zero value. 4259 */ 4260 static int 4261 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 4262 __unused vnode_t vp) 4263 { 4264 struct nfsclient *clp = stp->ls_clp; 4265 int gotlock, error, retrycnt, zapped_clp; 4266 nfsv4stateid_t tstateid; 4267 fhandle_t tfh; 4268 4269 /* 4270 * If the conflict is with an old delegation... 4271 */ 4272 if (stp->ls_flags & NFSLCK_OLDDELEG) { 4273 /* 4274 * You can delete it, if it has expired. 4275 */ 4276 if (clp->lc_delegtime < NFSD_MONOSEC) { 4277 nfsrv_freedeleg(stp); 4278 NFSUNLOCKSTATE(); 4279 return (-1); 4280 } 4281 NFSUNLOCKSTATE(); 4282 /* 4283 * During this delay, the old delegation could expire or it 4284 * could be recovered by the client via an Open with 4285 * CLAIM_DELEGATE_PREV. 4286 * Release the nfsv4root_lock, if held. 4287 */ 4288 if (*haslockp) { 4289 *haslockp = 0; 4290 NFSLOCKV4ROOTMUTEX(); 4291 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4292 NFSUNLOCKV4ROOTMUTEX(); 4293 } 4294 return (NFSERR_DELAY); 4295 } 4296 4297 /* 4298 * It's a current delegation, so: 4299 * - check to see if the delegation has expired 4300 * - if so, get the v4root lock and then expire it 4301 */ 4302 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 4303 /* 4304 * - do a recall callback, since not yet done 4305 * For now, never allow truncate to be set. To use 4306 * truncate safely, it must be guaranteed that the 4307 * Remove, Rename or Setattr with size of 0 will 4308 * succeed and that would require major changes to 4309 * the VFS/Vnode OPs. 4310 * Set the expiry time large enough so that it won't expire 4311 * until after the callback, then set it correctly, once 4312 * the callback is done. (The delegation will now time 4313 * out whether or not the Recall worked ok. The timeout 4314 * will be extended when ops are done on the delegation 4315 * stateid, up to the timelimit.) 4316 */ 4317 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 4318 NFSRV_LEASEDELTA; 4319 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 4320 NFSRV_LEASEDELTA; 4321 stp->ls_flags |= NFSLCK_DELEGRECALL; 4322 4323 /* 4324 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 4325 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 4326 * in order to try and avoid a race that could happen 4327 * when a CBRecall request passed the Open reply with 4328 * the delegation in it when transitting the network. 4329 * Since nfsrv_docallback will sleep, don't use stp after 4330 * the call. 4331 */ 4332 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 4333 sizeof (tstateid)); 4334 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 4335 sizeof (tfh)); 4336 NFSUNLOCKSTATE(); 4337 if (*haslockp) { 4338 *haslockp = 0; 4339 NFSLOCKV4ROOTMUTEX(); 4340 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4341 NFSUNLOCKV4ROOTMUTEX(); 4342 } 4343 retrycnt = 0; 4344 do { 4345 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 4346 &tstateid, 0, &tfh, NULL, NULL, p); 4347 retrycnt++; 4348 } while ((error == NFSERR_BADSTATEID || 4349 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 4350 return (NFSERR_DELAY); 4351 } 4352 4353 if (clp->lc_expiry >= NFSD_MONOSEC && 4354 stp->ls_delegtime >= NFSD_MONOSEC) { 4355 NFSUNLOCKSTATE(); 4356 /* 4357 * A recall has been done, but it has not yet expired. 4358 * So, RETURN_DELAY. 4359 */ 4360 if (*haslockp) { 4361 *haslockp = 0; 4362 NFSLOCKV4ROOTMUTEX(); 4363 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4364 NFSUNLOCKV4ROOTMUTEX(); 4365 } 4366 return (NFSERR_DELAY); 4367 } 4368 4369 /* 4370 * If we don't yet have the lock, just get it and then return, 4371 * since we need that before deleting expired state, such as 4372 * this delegation. 4373 * When getting the lock, unlock the vnode, so other nfsds that 4374 * are in progress, won't get stuck waiting for the vnode lock. 4375 */ 4376 if (*haslockp == 0) { 4377 NFSUNLOCKSTATE(); 4378 NFSVOPUNLOCK(vp, 0, p); 4379 NFSLOCKV4ROOTMUTEX(); 4380 nfsv4_relref(&nfsv4rootfs_lock); 4381 do { 4382 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4383 NFSV4ROOTLOCKMUTEXPTR); 4384 } while (!gotlock); 4385 NFSUNLOCKV4ROOTMUTEX(); 4386 *haslockp = 1; 4387 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY, p); 4388 return (-1); 4389 } 4390 4391 NFSUNLOCKSTATE(); 4392 /* 4393 * Ok, we can delete the expired delegation. 4394 * First, write the Revoke record to stable storage and then 4395 * clear out the conflict. 4396 * Since all other nfsd threads are now blocked, we can safely 4397 * sleep without the state changing. 4398 */ 4399 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4400 if (clp->lc_expiry < NFSD_MONOSEC) { 4401 nfsrv_cleanclient(clp, p); 4402 nfsrv_freedeleglist(&clp->lc_deleg); 4403 nfsrv_freedeleglist(&clp->lc_olddeleg); 4404 LIST_REMOVE(clp, lc_hash); 4405 zapped_clp = 1; 4406 } else { 4407 nfsrv_freedeleg(stp); 4408 zapped_clp = 0; 4409 } 4410 if (zapped_clp) 4411 nfsrv_zapclient(clp, p); 4412 return (-1); 4413 } 4414 4415 /* 4416 * Check for a remove allowed, if remove is set to 1 and get rid of 4417 * delegations. 4418 */ 4419 APPLESTATIC int 4420 nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p) 4421 { 4422 struct nfsstate *stp; 4423 struct nfslockfile *lfp; 4424 int error, haslock = 0; 4425 fhandle_t nfh; 4426 4427 /* 4428 * First, get the lock file structure. 4429 * (A return of -1 means no associated state, so remove ok.) 4430 */ 4431 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 4432 tryagain: 4433 NFSLOCKSTATE(); 4434 if (!error) 4435 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 4436 if (error) { 4437 NFSUNLOCKSTATE(); 4438 if (haslock) { 4439 NFSLOCKV4ROOTMUTEX(); 4440 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4441 NFSUNLOCKV4ROOTMUTEX(); 4442 } 4443 if (error == -1) 4444 return (0); 4445 return (error); 4446 } 4447 4448 /* 4449 * Now, we must Recall any delegations. 4450 */ 4451 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p); 4452 if (error) { 4453 /* 4454 * nfsrv_cleandeleg() unlocks state for non-zero 4455 * return. 4456 */ 4457 if (error == -1) 4458 goto tryagain; 4459 if (haslock) { 4460 NFSLOCKV4ROOTMUTEX(); 4461 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4462 NFSUNLOCKV4ROOTMUTEX(); 4463 } 4464 return (error); 4465 } 4466 4467 /* 4468 * Now, look for a conflicting open share. 4469 */ 4470 if (remove) { 4471 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 4472 if (stp->ls_flags & NFSLCK_WRITEDENY) { 4473 error = NFSERR_FILEOPEN; 4474 break; 4475 } 4476 } 4477 } 4478 4479 NFSUNLOCKSTATE(); 4480 if (haslock) { 4481 NFSLOCKV4ROOTMUTEX(); 4482 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4483 NFSUNLOCKV4ROOTMUTEX(); 4484 } 4485 return (error); 4486 } 4487 4488 /* 4489 * Clear out all delegations for the file referred to by lfp. 4490 * May return NFSERR_DELAY, if there will be a delay waiting for 4491 * delegations to expire. 4492 * Returns -1 to indicate it slept while recalling a delegation. 4493 * This function has the side effect of deleting the nfslockfile structure, 4494 * if it no longer has associated state and didn't have to sleep. 4495 * Unlocks State before a non-zero value is returned. 4496 */ 4497 static int 4498 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 4499 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 4500 { 4501 struct nfsstate *stp, *nstp; 4502 int ret; 4503 4504 stp = LIST_FIRST(&lfp->lf_deleg); 4505 while (stp != LIST_END(&lfp->lf_deleg)) { 4506 nstp = LIST_NEXT(stp, ls_file); 4507 if (stp->ls_clp != clp) { 4508 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 4509 if (ret) { 4510 /* 4511 * nfsrv_delegconflict() unlocks state 4512 * when it returns non-zero. 4513 */ 4514 return (ret); 4515 } 4516 } 4517 stp = nstp; 4518 } 4519 return (0); 4520 } 4521 4522 /* 4523 * There are certain operations that, when being done outside of NFSv4, 4524 * require that any NFSv4 delegation for the file be recalled. 4525 * This function is to be called for those cases: 4526 * VOP_RENAME() - When a delegation is being recalled for any reason, 4527 * the client may have to do Opens against the server, using the file's 4528 * final component name. If the file has been renamed on the server, 4529 * that component name will be incorrect and the Open will fail. 4530 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 4531 * been removed on the server, if there is a delegation issued to 4532 * that client for the file. I say "theoretically" since clients 4533 * normally do an Access Op before the Open and that Access Op will 4534 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 4535 * they will detect the file's removal in the same manner. (There is 4536 * one case where RFC3530 allows a client to do an Open without first 4537 * doing an Access Op, which is passage of a check against the ACE 4538 * returned with a Write delegation, but current practice is to ignore 4539 * the ACE and always do an Access Op.) 4540 * Since the functions can only be called with an unlocked vnode, this 4541 * can't be done at this time. 4542 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 4543 * locks locally in the client, which are not visible to the server. To 4544 * deal with this, issuing of delegations for a vnode must be disabled 4545 * and all delegations for the vnode recalled. This is done via the 4546 * second function, using the VV_DISABLEDELEG vflag on the vnode. 4547 */ 4548 APPLESTATIC void 4549 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 4550 { 4551 struct timespec mytime; 4552 int32_t starttime; 4553 int error; 4554 4555 KASSERT(!VOP_ISLOCKED(vp), ("vp %p is locked", vp)); 4556 4557 /* 4558 * First, check to see if the server is currently running and it has 4559 * been called for a regular file when issuing delegations. 4560 */ 4561 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 4562 nfsrv_issuedelegs == 0) 4563 return; 4564 4565 /* 4566 * First, get a reference on the nfsv4rootfs_lock so that an 4567 * exclusive lock cannot be acquired by another thread. 4568 */ 4569 NFSLOCKV4ROOTMUTEX(); 4570 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR); 4571 NFSUNLOCKV4ROOTMUTEX(); 4572 4573 /* 4574 * Now, call nfsrv_checkremove() in a loop while it returns 4575 * NFSERR_DELAY. Return upon any other error or when timed out. 4576 */ 4577 NFSGETNANOTIME(&mytime); 4578 starttime = (u_int32_t)mytime.tv_sec; 4579 do { 4580 error = nfsrv_checkremove(vp, 0, p); 4581 if (error == NFSERR_DELAY) { 4582 NFSGETNANOTIME(&mytime); 4583 if (((u_int32_t)mytime.tv_sec - starttime) > 4584 NFS_REMOVETIMEO && 4585 ((u_int32_t)mytime.tv_sec - starttime) < 4586 100000) 4587 break; 4588 /* Sleep for a short period of time */ 4589 (void) nfs_catnap(PZERO, 0, "nfsremove"); 4590 } 4591 } while (error == NFSERR_DELAY); 4592 NFSLOCKV4ROOTMUTEX(); 4593 nfsv4_relref(&nfsv4rootfs_lock); 4594 NFSUNLOCKV4ROOTMUTEX(); 4595 } 4596 4597 APPLESTATIC void 4598 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 4599 { 4600 4601 #ifdef VV_DISABLEDELEG 4602 /* 4603 * First, flag issuance of delegations disabled. 4604 */ 4605 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 4606 #endif 4607 4608 /* 4609 * Then call nfsd_recalldelegation() to get rid of all extant 4610 * delegations. 4611 */ 4612 nfsd_recalldelegation(vp, p); 4613 } 4614 4615 /* 4616 * Check for conflicting locks, etc. and then get rid of delegations. 4617 * (At one point I thought that I should get rid of delegations for any 4618 * Setattr, since it could potentially disallow the I/O op (read or write) 4619 * allowed by the delegation. However, Setattr Ops that aren't changing 4620 * the size get a stateid of all 0s, so you can't tell if it is a delegation 4621 * for the same client or a different one, so I decided to only get rid 4622 * of delegations for other clients when the size is being changed.) 4623 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 4624 * as Write backs, even if there is no delegation, so it really isn't any 4625 * different?) 4626 */ 4627 APPLESTATIC int 4628 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 4629 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 4630 struct nfsexstuff *exp, NFSPROC_T *p) 4631 { 4632 struct nfsstate st, *stp = &st; 4633 struct nfslock lo, *lop = &lo; 4634 int error = 0; 4635 nfsquad_t clientid; 4636 4637 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 4638 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 4639 lop->lo_first = nvap->na_size; 4640 } else { 4641 stp->ls_flags = 0; 4642 lop->lo_first = 0; 4643 } 4644 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 4645 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 4646 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 4647 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 4648 stp->ls_flags |= NFSLCK_SETATTR; 4649 if (stp->ls_flags == 0) 4650 return (0); 4651 lop->lo_end = NFS64BITSSET; 4652 lop->lo_flags = NFSLCK_WRITE; 4653 stp->ls_ownerlen = 0; 4654 stp->ls_op = NULL; 4655 stp->ls_uid = nd->nd_cred->cr_uid; 4656 stp->ls_stateid.seqid = stateidp->seqid; 4657 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 4658 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 4659 stp->ls_stateid.other[2] = stateidp->other[2]; 4660 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 4661 stateidp, exp, nd, p); 4662 return (error); 4663 } 4664 4665 /* 4666 * Check for a write delegation and do a CBGETATTR if there is one, updating 4667 * the attributes, as required. 4668 * Should I return an error if I can't get the attributes? (For now, I'll 4669 * just return ok. 4670 */ 4671 APPLESTATIC int 4672 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 4673 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, struct ucred *cred, 4674 NFSPROC_T *p) 4675 { 4676 struct nfsstate *stp; 4677 struct nfslockfile *lfp; 4678 struct nfsclient *clp; 4679 struct nfsvattr nva; 4680 fhandle_t nfh; 4681 int error; 4682 nfsattrbit_t cbbits; 4683 u_quad_t delegfilerev; 4684 4685 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 4686 if (!NFSNONZERO_ATTRBIT(&cbbits)) 4687 return (0); 4688 4689 /* 4690 * Get the lock file structure. 4691 * (A return of -1 means no associated state, so return ok.) 4692 */ 4693 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 4694 NFSLOCKSTATE(); 4695 if (!error) 4696 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 4697 if (error) { 4698 NFSUNLOCKSTATE(); 4699 if (error == -1) 4700 return (0); 4701 return (error); 4702 } 4703 4704 /* 4705 * Now, look for a write delegation. 4706 */ 4707 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 4708 if (stp->ls_flags & NFSLCK_DELEGWRITE) 4709 break; 4710 } 4711 if (stp == LIST_END(&lfp->lf_deleg)) { 4712 NFSUNLOCKSTATE(); 4713 return (0); 4714 } 4715 clp = stp->ls_clp; 4716 delegfilerev = stp->ls_filerev; 4717 4718 /* 4719 * If the Write delegation was issued as a part of this Compound RPC 4720 * or if we have an Implied Clientid (used in a previous Op in this 4721 * compound) and it is the client the delegation was issued to, 4722 * just return ok. 4723 * I also assume that it is from the same client iff the network 4724 * host IP address is the same as the callback address. (Not 4725 * exactly correct by the RFC, but avoids a lot of Getattr 4726 * callbacks.) 4727 */ 4728 if (nd->nd_compref == stp->ls_compref || 4729 ((nd->nd_flag & ND_IMPLIEDCLID) && 4730 clp->lc_clientid.qval == nd->nd_clientid.qval) || 4731 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 4732 NFSUNLOCKSTATE(); 4733 return (0); 4734 } 4735 4736 /* 4737 * We are now done with the delegation state structure, 4738 * so the statelock can be released and we can now tsleep(). 4739 */ 4740 4741 /* 4742 * Now, we must do the CB Getattr callback, to see if Change or Size 4743 * has changed. 4744 */ 4745 if (clp->lc_expiry >= NFSD_MONOSEC) { 4746 NFSUNLOCKSTATE(); 4747 NFSVNO_ATTRINIT(&nva); 4748 nva.na_filerev = NFS64BITSSET; 4749 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 4750 0, &nfh, &nva, &cbbits, p); 4751 if (!error) { 4752 if ((nva.na_filerev != NFS64BITSSET && 4753 nva.na_filerev > delegfilerev) || 4754 (NFSVNO_ISSETSIZE(&nva) && 4755 nva.na_size != nvap->na_size)) { 4756 nfsvno_updfilerev(vp, nvap, cred, p); 4757 if (NFSVNO_ISSETSIZE(&nva)) 4758 nvap->na_size = nva.na_size; 4759 } 4760 } 4761 } else { 4762 NFSUNLOCKSTATE(); 4763 } 4764 return (0); 4765 } 4766 4767 /* 4768 * This function looks for openowners that haven't had any opens for 4769 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 4770 * is set. 4771 */ 4772 APPLESTATIC void 4773 nfsrv_throwawayopens(NFSPROC_T *p) 4774 { 4775 struct nfsclient *clp, *nclp; 4776 struct nfsstate *stp, *nstp; 4777 int i; 4778 4779 NFSLOCKSTATE(); 4780 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 4781 /* 4782 * For each client... 4783 */ 4784 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 4785 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 4786 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 4787 if (LIST_EMPTY(&stp->ls_open) && 4788 (stp->ls_noopens > NFSNOOPEN || 4789 (nfsrv_openpluslock * 2) > 4790 NFSRV_V4STATELIMIT)) 4791 nfsrv_freeopenowner(stp, 0, p); 4792 } 4793 } 4794 } 4795 NFSUNLOCKSTATE(); 4796 } 4797 4798 /* 4799 * This function checks to see if the credentials are the same. 4800 * Returns 1 for not same, 0 otherwise. 4801 */ 4802 static int 4803 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 4804 { 4805 4806 if (nd->nd_flag & ND_GSS) { 4807 if (!(clp->lc_flags & LCL_GSS)) 4808 return (1); 4809 if (clp->lc_flags & LCL_NAME) { 4810 if (nd->nd_princlen != clp->lc_namelen || 4811 NFSBCMP(nd->nd_principal, clp->lc_name, 4812 clp->lc_namelen)) 4813 return (1); 4814 else 4815 return (0); 4816 } 4817 if (nd->nd_cred->cr_uid == clp->lc_uid) 4818 return (0); 4819 else 4820 return (1); 4821 } else if (clp->lc_flags & LCL_GSS) 4822 return (1); 4823 /* 4824 * For AUTH_SYS, allow the same uid or root. (This is underspecified 4825 * in RFC3530, which talks about principals, but doesn't say anything 4826 * about uids for AUTH_SYS.) 4827 */ 4828 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 4829 return (0); 4830 else 4831 return (1); 4832 } 4833 4834 /* 4835 * Calculate the lease expiry time. 4836 */ 4837 static time_t 4838 nfsrv_leaseexpiry(void) 4839 { 4840 struct timeval curtime; 4841 4842 NFSGETTIME(&curtime); 4843 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 4844 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 4845 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 4846 } 4847 4848 /* 4849 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 4850 */ 4851 static void 4852 nfsrv_delaydelegtimeout(struct nfsstate *stp) 4853 { 4854 4855 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 4856 return; 4857 4858 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 4859 stp->ls_delegtime < stp->ls_delegtimelimit) { 4860 stp->ls_delegtime += nfsrv_lease; 4861 if (stp->ls_delegtime > stp->ls_delegtimelimit) 4862 stp->ls_delegtime = stp->ls_delegtimelimit; 4863 } 4864 } 4865 4866 /* 4867 * This function checks to see if there is any other state associated 4868 * with the openowner for this Open. 4869 * It returns 1 if there is no other state, 0 otherwise. 4870 */ 4871 static int 4872 nfsrv_nootherstate(struct nfsstate *stp) 4873 { 4874 struct nfsstate *tstp; 4875 4876 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 4877 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 4878 return (0); 4879 } 4880 return (1); 4881 } 4882 4883 /* 4884 * Create a list of lock deltas (changes to local byte range locking 4885 * that can be rolled back using the list) and apply the changes via 4886 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 4887 * the rollback or update function will be called after this. 4888 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 4889 * call fails. If it returns an error, it will unlock the list. 4890 */ 4891 static int 4892 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 4893 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 4894 { 4895 struct nfslock *lop, *nlop; 4896 int error = 0; 4897 4898 /* Loop through the list of locks. */ 4899 lop = LIST_FIRST(&lfp->lf_locallock); 4900 while (first < end && lop != NULL) { 4901 nlop = LIST_NEXT(lop, lo_lckowner); 4902 if (first >= lop->lo_end) { 4903 /* not there yet */ 4904 lop = nlop; 4905 } else if (first < lop->lo_first) { 4906 /* new one starts before entry in list */ 4907 if (end <= lop->lo_first) { 4908 /* no overlap between old and new */ 4909 error = nfsrv_dolocal(vp, lfp, flags, 4910 NFSLCK_UNLOCK, first, end, cfp, p); 4911 if (error != 0) 4912 break; 4913 first = end; 4914 } else { 4915 /* handle fragment overlapped with new one */ 4916 error = nfsrv_dolocal(vp, lfp, flags, 4917 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 4918 p); 4919 if (error != 0) 4920 break; 4921 first = lop->lo_first; 4922 } 4923 } else { 4924 /* new one overlaps this entry in list */ 4925 if (end <= lop->lo_end) { 4926 /* overlaps all of new one */ 4927 error = nfsrv_dolocal(vp, lfp, flags, 4928 lop->lo_flags, first, end, cfp, p); 4929 if (error != 0) 4930 break; 4931 first = end; 4932 } else { 4933 /* handle fragment overlapped with new one */ 4934 error = nfsrv_dolocal(vp, lfp, flags, 4935 lop->lo_flags, first, lop->lo_end, cfp, p); 4936 if (error != 0) 4937 break; 4938 first = lop->lo_end; 4939 lop = nlop; 4940 } 4941 } 4942 } 4943 if (first < end && error == 0) 4944 /* handle fragment past end of list */ 4945 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 4946 end, cfp, p); 4947 return (error); 4948 } 4949 4950 /* 4951 * Local lock unlock. Unlock all byte ranges that are no longer locked 4952 * by NFSv4. 4953 */ 4954 static void 4955 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 4956 uint64_t init_end, NFSPROC_T *p) 4957 { 4958 struct nfslock *lop; 4959 4960 uint64_t first, end; 4961 4962 first = init_first; 4963 end = init_end; 4964 while (first < init_end) { 4965 /* Loop through all nfs locks, adjusting first and end */ 4966 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 4967 if (first >= lop->lo_first && 4968 first < lop->lo_end) 4969 /* Overlaps initial part */ 4970 first = lop->lo_end; 4971 else if (end > lop->lo_first && 4972 lop->lo_first >= first) 4973 /* Begins before end and past first */ 4974 end = lop->lo_first; 4975 if (first >= end) 4976 /* shrunk to 0 so this iteration is done */ 4977 break; 4978 } 4979 if (first < end) { 4980 /* Unlock this segment */ 4981 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 4982 NFSLCK_READ, first, end, NULL, p); 4983 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 4984 first, end); 4985 } 4986 /* and move on to the rest of the range */ 4987 first = end; 4988 end = init_end; 4989 } 4990 } 4991 4992 /* 4993 * Do the local lock operation and update the rollback list, as required. 4994 * Perform the rollback and return the error if nfsvno_advlock() fails. 4995 */ 4996 static int 4997 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 4998 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 4999 { 5000 struct nfsrollback *rlp; 5001 int error, ltype, oldltype; 5002 5003 if (flags & NFSLCK_WRITE) 5004 ltype = F_WRLCK; 5005 else if (flags & NFSLCK_READ) 5006 ltype = F_RDLCK; 5007 else 5008 ltype = F_UNLCK; 5009 if (oldflags & NFSLCK_WRITE) 5010 oldltype = F_WRLCK; 5011 else if (oldflags & NFSLCK_READ) 5012 oldltype = F_RDLCK; 5013 else 5014 oldltype = F_UNLCK; 5015 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 5016 /* nothing to do */ 5017 return (0); 5018 error = nfsvno_advlock(vp, ltype, first, end, p); 5019 if (error != 0) { 5020 if (cfp != NULL) { 5021 cfp->cl_clientid.lval[0] = 0; 5022 cfp->cl_clientid.lval[1] = 0; 5023 cfp->cl_first = 0; 5024 cfp->cl_end = NFS64BITSSET; 5025 cfp->cl_flags = NFSLCK_WRITE; 5026 cfp->cl_ownerlen = 5; 5027 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 5028 } 5029 nfsrv_locallock_rollback(vp, lfp, p); 5030 } else if (ltype != F_UNLCK) { 5031 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 5032 M_WAITOK); 5033 rlp->rlck_first = first; 5034 rlp->rlck_end = end; 5035 rlp->rlck_type = oldltype; 5036 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 5037 } 5038 return (error); 5039 } 5040 5041 /* 5042 * Roll back local lock changes and free up the rollback list. 5043 */ 5044 static void 5045 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 5046 { 5047 struct nfsrollback *rlp, *nrlp; 5048 5049 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 5050 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 5051 rlp->rlck_end, p); 5052 free(rlp, M_NFSDROLLBACK); 5053 } 5054 LIST_INIT(&lfp->lf_rollback); 5055 } 5056 5057 /* 5058 * Update local lock list and delete rollback list (ie now committed to the 5059 * local locks). Most of the work is done by the internal function. 5060 */ 5061 static void 5062 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 5063 uint64_t end) 5064 { 5065 struct nfsrollback *rlp, *nrlp; 5066 struct nfslock *new_lop, *other_lop; 5067 5068 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 5069 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 5070 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 5071 M_WAITOK); 5072 else 5073 other_lop = NULL; 5074 new_lop->lo_flags = flags; 5075 new_lop->lo_first = first; 5076 new_lop->lo_end = end; 5077 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 5078 if (new_lop != NULL) 5079 free(new_lop, M_NFSDLOCK); 5080 if (other_lop != NULL) 5081 free(other_lop, M_NFSDLOCK); 5082 5083 /* and get rid of the rollback list */ 5084 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 5085 free(rlp, M_NFSDROLLBACK); 5086 LIST_INIT(&lfp->lf_rollback); 5087 } 5088 5089 /* 5090 * Lock the struct nfslockfile for local lock updating. 5091 */ 5092 static void 5093 nfsrv_locklf(struct nfslockfile *lfp) 5094 { 5095 int gotlock; 5096 5097 /* lf_usecount ensures *lfp won't be free'd */ 5098 lfp->lf_usecount++; 5099 do { 5100 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 5101 NFSSTATEMUTEXPTR); 5102 } while (gotlock == 0); 5103 lfp->lf_usecount--; 5104 } 5105 5106 /* 5107 * Unlock the struct nfslockfile after local lock updating. 5108 */ 5109 static void 5110 nfsrv_unlocklf(struct nfslockfile *lfp) 5111 { 5112 5113 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 5114 } 5115 5116