nfs_nfsdstate.c revision 269398
1/*- 2 * Copyright (c) 2009 Rick Macklem, University of Guelph 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/10/sys/fs/nfsserver/nfs_nfsdstate.c 269398 2014-08-01 21:10:41Z rmacklem $"); 30 31#ifndef APPLEKEXT 32#include <fs/nfs/nfsport.h> 33 34struct nfsrv_stablefirst nfsrv_stablefirst; 35int nfsrv_issuedelegs = 0; 36int nfsrv_dolocallocks = 0; 37struct nfsv4lock nfsv4rootfs_lock; 38 39extern int newnfs_numnfsd; 40extern struct nfsstats newnfsstats; 41extern int nfsrv_lease; 42extern struct timeval nfsboottime; 43extern u_int32_t newnfs_true, newnfs_false; 44NFSV4ROOTLOCKMUTEX; 45NFSSTATESPINLOCK; 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 */ 52struct nfsclienthashhead nfsclienthash[NFSCLIENTHASHSIZE]; 53struct nfslockhashhead nfslockhash[NFSLOCKHASHSIZE]; 54struct nfssessionhash nfssessionhash[NFSSESSIONHASHSIZE]; 55#endif /* !APPLEKEXT */ 56 57static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 58static time_t nfsrvboottime; 59static int nfsrv_writedelegifpos = 1; 60static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 61static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 62static int nfsrv_nogsscallback = 0; 63 64/* local functions */ 65static void nfsrv_dumpaclient(struct nfsclient *clp, 66 struct nfsd_dumpclients *dumpp); 67static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 68 NFSPROC_T *p); 69static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 70 NFSPROC_T *p); 71static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 72 NFSPROC_T *p); 73static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 74 int cansleep, NFSPROC_T *p); 75static void nfsrv_freenfslock(struct nfslock *lop); 76static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 77static void nfsrv_freedeleg(struct nfsstate *); 78static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 79 u_int32_t flags, struct nfsstate **stpp); 80static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 81 struct nfsstate **stpp); 82static int nfsrv_getlockfh(vnode_t vp, u_short flags, 83 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 84static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 85 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 86static void nfsrv_insertlock(struct nfslock *new_lop, 87 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 88static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 89 struct nfslock **other_lopp, struct nfslockfile *lfp); 90static int nfsrv_getipnumber(u_char *cp); 91static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 92 nfsv4stateid_t *stateidp, int specialid); 93static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 94 u_int32_t flags); 95static int nfsrv_docallback(struct nfsclient *clp, int procnum, 96 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 97 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p); 98static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 99 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp); 100static u_int32_t nfsrv_nextclientindex(void); 101static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 102static void nfsrv_markstable(struct nfsclient *clp); 103static int nfsrv_checkstable(struct nfsclient *clp); 104static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 105 vnode *vp, NFSPROC_T *p); 106static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 107 NFSPROC_T *p, vnode_t vp); 108static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 109 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 110static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 111 struct nfsclient *clp); 112static time_t nfsrv_leaseexpiry(void); 113static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 114static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 115 struct nfsstate *stp, struct nfsrvcache *op); 116static int nfsrv_nootherstate(struct nfsstate *stp); 117static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 118 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 119static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 120 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 121static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 122 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 123 NFSPROC_T *p); 124static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 125 NFSPROC_T *p); 126static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 127 uint64_t first, uint64_t end); 128static void nfsrv_locklf(struct nfslockfile *lfp); 129static void nfsrv_unlocklf(struct nfslockfile *lfp); 130static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 131static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid); 132static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 133 int dont_replycache, struct nfsdsession **sepp); 134static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 135 136/* 137 * Scan the client list for a match and either return the current one, 138 * create a new entry or return an error. 139 * If returning a non-error, the clp structure must either be linked into 140 * the client list or free'd. 141 */ 142APPLESTATIC int 143nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 144 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 145{ 146 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 147 int i, error = 0; 148 struct nfsstate *stp, *tstp; 149 struct sockaddr_in *sad, *rad; 150 int zapit = 0, gotit, hasstate = 0, igotlock; 151 static u_int64_t confirm_index = 0; 152 153 /* 154 * Check for state resource limit exceeded. 155 */ 156 if (nfsrv_openpluslock > NFSRV_V4STATELIMIT) { 157 error = NFSERR_RESOURCE; 158 goto out; 159 } 160 161 if (nfsrv_issuedelegs == 0 || 162 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 163 /* 164 * Don't do callbacks when delegations are disabled or 165 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 166 * If establishing a callback connection is attempted 167 * when a firewall is blocking the callback path, the 168 * server may wait too long for the connect attempt to 169 * succeed during the Open. Some clients, such as Linux, 170 * may timeout and give up on the Open before the server 171 * replies. Also, since AUTH_GSS callbacks are not 172 * yet interoperability tested, they might cause the 173 * server to crap out, if they get past the Init call to 174 * the client. 175 */ 176 new_clp->lc_program = 0; 177 178 /* Lock out other nfsd threads */ 179 NFSLOCKV4ROOTMUTEX(); 180 nfsv4_relref(&nfsv4rootfs_lock); 181 do { 182 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 183 NFSV4ROOTLOCKMUTEXPTR, NULL); 184 } while (!igotlock); 185 NFSUNLOCKV4ROOTMUTEX(); 186 187 /* 188 * Search for a match in the client list. 189 */ 190 gotit = i = 0; 191 while (i < NFSCLIENTHASHSIZE && !gotit) { 192 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 193 if (new_clp->lc_idlen == clp->lc_idlen && 194 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 195 gotit = 1; 196 break; 197 } 198 } 199 i++; 200 } 201 if (!gotit || 202 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 203 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 204 /* 205 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 206 * client is trying to update a confirmed clientid. 207 */ 208 NFSLOCKV4ROOTMUTEX(); 209 nfsv4_unlock(&nfsv4rootfs_lock, 1); 210 NFSUNLOCKV4ROOTMUTEX(); 211 confirmp->lval[1] = 0; 212 error = NFSERR_NOENT; 213 goto out; 214 } 215 /* 216 * Get rid of the old one. 217 */ 218 if (i != NFSCLIENTHASHSIZE) { 219 LIST_REMOVE(clp, lc_hash); 220 nfsrv_cleanclient(clp, p); 221 nfsrv_freedeleglist(&clp->lc_deleg); 222 nfsrv_freedeleglist(&clp->lc_olddeleg); 223 zapit = 1; 224 } 225 /* 226 * Add it after assigning a client id to it. 227 */ 228 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 229 if ((nd->nd_flag & ND_NFSV41) != 0) 230 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 231 ++confirm_index; 232 else 233 confirmp->qval = new_clp->lc_confirm.qval = 234 ++confirm_index; 235 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 236 (u_int32_t)nfsrvboottime; 237 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 238 nfsrv_nextclientindex(); 239 new_clp->lc_stateindex = 0; 240 new_clp->lc_statemaxindex = 0; 241 new_clp->lc_cbref = 0; 242 new_clp->lc_expiry = nfsrv_leaseexpiry(); 243 LIST_INIT(&new_clp->lc_open); 244 LIST_INIT(&new_clp->lc_deleg); 245 LIST_INIT(&new_clp->lc_olddeleg); 246 LIST_INIT(&new_clp->lc_session); 247 for (i = 0; i < NFSSTATEHASHSIZE; i++) 248 LIST_INIT(&new_clp->lc_stateid[i]); 249 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 250 lc_hash); 251 newnfsstats.srvclients++; 252 nfsrv_openpluslock++; 253 nfsrv_clients++; 254 NFSLOCKV4ROOTMUTEX(); 255 nfsv4_unlock(&nfsv4rootfs_lock, 1); 256 NFSUNLOCKV4ROOTMUTEX(); 257 if (zapit) 258 nfsrv_zapclient(clp, p); 259 *new_clpp = NULL; 260 goto out; 261 } 262 263 /* 264 * Now, handle the cases where the id is already issued. 265 */ 266 if (nfsrv_notsamecredname(nd, clp)) { 267 /* 268 * Check to see if there is expired state that should go away. 269 */ 270 if (clp->lc_expiry < NFSD_MONOSEC && 271 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 272 nfsrv_cleanclient(clp, p); 273 nfsrv_freedeleglist(&clp->lc_deleg); 274 } 275 276 /* 277 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 278 * RFC3530 Sec. 8.1.2 last para. 279 */ 280 if (!LIST_EMPTY(&clp->lc_deleg)) { 281 hasstate = 1; 282 } else if (LIST_EMPTY(&clp->lc_open)) { 283 hasstate = 0; 284 } else { 285 hasstate = 0; 286 /* Look for an Open on the OpenOwner */ 287 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 288 if (!LIST_EMPTY(&stp->ls_open)) { 289 hasstate = 1; 290 break; 291 } 292 } 293 } 294 if (hasstate) { 295 /* 296 * If the uid doesn't match, return NFSERR_CLIDINUSE after 297 * filling out the correct ipaddr and portnum. 298 */ 299 sad = NFSSOCKADDR(new_clp->lc_req.nr_nam, struct sockaddr_in *); 300 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 301 sad->sin_addr.s_addr = rad->sin_addr.s_addr; 302 sad->sin_port = rad->sin_port; 303 NFSLOCKV4ROOTMUTEX(); 304 nfsv4_unlock(&nfsv4rootfs_lock, 1); 305 NFSUNLOCKV4ROOTMUTEX(); 306 error = NFSERR_CLIDINUSE; 307 goto out; 308 } 309 } 310 311 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 312 /* 313 * If the verifier has changed, the client has rebooted 314 * and a new client id is issued. The old state info 315 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 316 */ 317 LIST_REMOVE(clp, lc_hash); 318 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 319 if ((nd->nd_flag & ND_NFSV41) != 0) 320 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 321 ++confirm_index; 322 else 323 confirmp->qval = new_clp->lc_confirm.qval = 324 ++confirm_index; 325 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 326 nfsrvboottime; 327 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 328 nfsrv_nextclientindex(); 329 new_clp->lc_stateindex = 0; 330 new_clp->lc_statemaxindex = 0; 331 new_clp->lc_cbref = 0; 332 new_clp->lc_expiry = nfsrv_leaseexpiry(); 333 334 /* 335 * Save the state until confirmed. 336 */ 337 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 338 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 339 tstp->ls_clp = new_clp; 340 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 341 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 342 tstp->ls_clp = new_clp; 343 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 344 ls_list); 345 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 346 tstp->ls_clp = new_clp; 347 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 348 LIST_NEWHEAD(&new_clp->lc_stateid[i], 349 &clp->lc_stateid[i], ls_hash); 350 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 351 tstp->ls_clp = new_clp; 352 } 353 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 354 lc_hash); 355 newnfsstats.srvclients++; 356 nfsrv_openpluslock++; 357 nfsrv_clients++; 358 NFSLOCKV4ROOTMUTEX(); 359 nfsv4_unlock(&nfsv4rootfs_lock, 1); 360 NFSUNLOCKV4ROOTMUTEX(); 361 362 /* 363 * Must wait until any outstanding callback on the old clp 364 * completes. 365 */ 366 NFSLOCKSTATE(); 367 while (clp->lc_cbref) { 368 clp->lc_flags |= LCL_WAKEUPWANTED; 369 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 370 "nfsd clp", 10 * hz); 371 } 372 NFSUNLOCKSTATE(); 373 nfsrv_zapclient(clp, p); 374 *new_clpp = NULL; 375 goto out; 376 } 377 378 /* For NFSv4.1, mark that we found a confirmed clientid. */ 379 if ((nd->nd_flag & ND_NFSV41) != 0) 380 confirmp->lval[1] = 1; 381 else { 382 /* 383 * id and verifier match, so update the net address info 384 * and get rid of any existing callback authentication 385 * handle, so a new one will be acquired. 386 */ 387 LIST_REMOVE(clp, lc_hash); 388 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 389 new_clp->lc_expiry = nfsrv_leaseexpiry(); 390 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 391 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 392 clp->lc_clientid.lval[0]; 393 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 394 clp->lc_clientid.lval[1]; 395 new_clp->lc_delegtime = clp->lc_delegtime; 396 new_clp->lc_stateindex = clp->lc_stateindex; 397 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 398 new_clp->lc_cbref = 0; 399 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 400 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 401 tstp->ls_clp = new_clp; 402 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 403 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 404 tstp->ls_clp = new_clp; 405 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 406 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 407 tstp->ls_clp = new_clp; 408 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 409 LIST_NEWHEAD(&new_clp->lc_stateid[i], 410 &clp->lc_stateid[i], ls_hash); 411 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 412 tstp->ls_clp = new_clp; 413 } 414 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 415 lc_hash); 416 newnfsstats.srvclients++; 417 nfsrv_openpluslock++; 418 nfsrv_clients++; 419 } 420 NFSLOCKV4ROOTMUTEX(); 421 nfsv4_unlock(&nfsv4rootfs_lock, 1); 422 NFSUNLOCKV4ROOTMUTEX(); 423 424 if ((nd->nd_flag & ND_NFSV41) == 0) { 425 /* 426 * Must wait until any outstanding callback on the old clp 427 * completes. 428 */ 429 NFSLOCKSTATE(); 430 while (clp->lc_cbref) { 431 clp->lc_flags |= LCL_WAKEUPWANTED; 432 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 433 "nfsdclp", 10 * hz); 434 } 435 NFSUNLOCKSTATE(); 436 nfsrv_zapclient(clp, p); 437 *new_clpp = NULL; 438 } 439 440out: 441 NFSEXITCODE2(error, nd); 442 return (error); 443} 444 445/* 446 * Check to see if the client id exists and optionally confirm it. 447 */ 448APPLESTATIC int 449nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 450 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 451 struct nfsrv_descript *nd, NFSPROC_T *p) 452{ 453 struct nfsclient *clp; 454 struct nfsstate *stp; 455 int i; 456 struct nfsclienthashhead *hp; 457 int error = 0, igotlock, doneok; 458 struct nfssessionhash *shp; 459 struct nfsdsession *sep; 460 uint64_t sessid[2]; 461 static uint64_t next_sess = 0; 462 463 if (clpp) 464 *clpp = NULL; 465 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 466 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) { 467 error = NFSERR_STALECLIENTID; 468 goto out; 469 } 470 471 /* 472 * If called with opflags == CLOPS_RENEW, the State Lock is 473 * already held. Otherwise, we need to get either that or, 474 * for the case of Confirm, lock out the nfsd threads. 475 */ 476 if (opflags & CLOPS_CONFIRM) { 477 NFSLOCKV4ROOTMUTEX(); 478 nfsv4_relref(&nfsv4rootfs_lock); 479 do { 480 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 481 NFSV4ROOTLOCKMUTEXPTR, NULL); 482 } while (!igotlock); 483 /* 484 * Create a new sessionid here, since we need to do it where 485 * there is a mutex held to serialize update of next_sess. 486 */ 487 if ((nd->nd_flag & ND_NFSV41) != 0) { 488 sessid[0] = ++next_sess; 489 sessid[1] = clientid.qval; 490 } 491 NFSUNLOCKV4ROOTMUTEX(); 492 } else if (opflags != CLOPS_RENEW) { 493 NFSLOCKSTATE(); 494 } 495 496 /* For NFSv4.1, the clp is acquired from the associated session. */ 497 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 498 opflags == CLOPS_RENEW) { 499 clp = NULL; 500 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 501 shp = NFSSESSIONHASH(nd->nd_sessionid); 502 NFSLOCKSESSION(shp); 503 sep = nfsrv_findsession(nd->nd_sessionid); 504 if (sep != NULL) 505 clp = sep->sess_clp; 506 NFSUNLOCKSESSION(shp); 507 } 508 } else { 509 hp = NFSCLIENTHASH(clientid); 510 LIST_FOREACH(clp, hp, lc_hash) { 511 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 512 break; 513 } 514 } 515 if (clp == NULL) { 516 if (opflags & CLOPS_CONFIRM) 517 error = NFSERR_STALECLIENTID; 518 else 519 error = NFSERR_EXPIRED; 520 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 521 /* 522 * If marked admin revoked, just return the error. 523 */ 524 error = NFSERR_ADMINREVOKED; 525 } 526 if (error) { 527 if (opflags & CLOPS_CONFIRM) { 528 NFSLOCKV4ROOTMUTEX(); 529 nfsv4_unlock(&nfsv4rootfs_lock, 1); 530 NFSUNLOCKV4ROOTMUTEX(); 531 } else if (opflags != CLOPS_RENEW) { 532 NFSUNLOCKSTATE(); 533 } 534 goto out; 535 } 536 537 /* 538 * Perform any operations specified by the opflags. 539 */ 540 if (opflags & CLOPS_CONFIRM) { 541 if (((nd->nd_flag & ND_NFSV41) != 0 && 542 clp->lc_confirm.lval[0] != confirm.lval[0]) || 543 ((nd->nd_flag & ND_NFSV41) == 0 && 544 clp->lc_confirm.qval != confirm.qval)) 545 error = NFSERR_STALECLIENTID; 546 else if (nfsrv_notsamecredname(nd, clp)) 547 error = NFSERR_CLIDINUSE; 548 549 if (!error) { 550 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 551 LCL_NEEDSCONFIRM) { 552 /* 553 * Hang onto the delegations (as old delegations) 554 * for an Open with CLAIM_DELEGATE_PREV unless in 555 * grace, but get rid of the rest of the state. 556 */ 557 nfsrv_cleanclient(clp, p); 558 nfsrv_freedeleglist(&clp->lc_olddeleg); 559 if (nfsrv_checkgrace(nd, clp, 0)) { 560 /* In grace, so just delete delegations */ 561 nfsrv_freedeleglist(&clp->lc_deleg); 562 } else { 563 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 564 stp->ls_flags |= NFSLCK_OLDDELEG; 565 clp->lc_delegtime = NFSD_MONOSEC + 566 nfsrv_lease + NFSRV_LEASEDELTA; 567 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 568 ls_list); 569 } 570 if ((nd->nd_flag & ND_NFSV41) != 0) 571 clp->lc_program = cbprogram; 572 } 573 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 574 if (clp->lc_program) 575 clp->lc_flags |= LCL_NEEDSCBNULL; 576 /* For NFSv4.1, link the session onto the client. */ 577 if (nsep != NULL) { 578 /* Hold a reference on the xprt for a backchannel. */ 579 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 580 != 0 && clp->lc_req.nr_client == NULL) { 581 clp->lc_req.nr_client = (struct __rpc_client *) 582 clnt_bck_create(nd->nd_xprt->xp_socket, 583 cbprogram, NFSV4_CBVERS); 584 if (clp->lc_req.nr_client != NULL) { 585 SVC_ACQUIRE(nd->nd_xprt); 586 nd->nd_xprt->xp_p2 = 587 clp->lc_req.nr_client->cl_private; 588 /* Disable idle timeout. */ 589 nd->nd_xprt->xp_idletimeout = 0; 590 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 591 } else 592 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 593 } 594 NFSBCOPY(sessid, nsep->sess_sessionid, 595 NFSX_V4SESSIONID); 596 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 597 NFSX_V4SESSIONID); 598 shp = NFSSESSIONHASH(nsep->sess_sessionid); 599 NFSLOCKSESSION(shp); 600 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 601 NFSLOCKSTATE(); 602 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 603 nsep->sess_clp = clp; 604 NFSUNLOCKSTATE(); 605 NFSUNLOCKSESSION(shp); 606 } 607 } 608 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 609 error = NFSERR_EXPIRED; 610 } 611 612 /* 613 * If called by the Renew Op, we must check the principal. 614 */ 615 if (!error && (opflags & CLOPS_RENEWOP)) { 616 if (nfsrv_notsamecredname(nd, clp)) { 617 doneok = 0; 618 for (i = 0; i < NFSSTATEHASHSIZE && doneok == 0; i++) { 619 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 620 if ((stp->ls_flags & NFSLCK_OPEN) && 621 stp->ls_uid == nd->nd_cred->cr_uid) { 622 doneok = 1; 623 break; 624 } 625 } 626 } 627 if (!doneok) 628 error = NFSERR_ACCES; 629 } 630 if (!error && (clp->lc_flags & LCL_CBDOWN)) 631 error = NFSERR_CBPATHDOWN; 632 } 633 if ((!error || error == NFSERR_CBPATHDOWN) && 634 (opflags & CLOPS_RENEW)) { 635 clp->lc_expiry = nfsrv_leaseexpiry(); 636 } 637 if (opflags & CLOPS_CONFIRM) { 638 NFSLOCKV4ROOTMUTEX(); 639 nfsv4_unlock(&nfsv4rootfs_lock, 1); 640 NFSUNLOCKV4ROOTMUTEX(); 641 } else if (opflags != CLOPS_RENEW) { 642 NFSUNLOCKSTATE(); 643 } 644 if (clpp) 645 *clpp = clp; 646 647out: 648 NFSEXITCODE2(error, nd); 649 return (error); 650} 651 652/* 653 * Perform the NFSv4.1 destroy clientid. 654 */ 655int 656nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p) 657{ 658 struct nfsclient *clp; 659 struct nfsclienthashhead *hp; 660 int error = 0, i, igotlock; 661 662 if (nfsrvboottime != clientid.lval[0]) { 663 error = NFSERR_STALECLIENTID; 664 goto out; 665 } 666 667 /* Lock out other nfsd threads */ 668 NFSLOCKV4ROOTMUTEX(); 669 nfsv4_relref(&nfsv4rootfs_lock); 670 do { 671 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 672 NFSV4ROOTLOCKMUTEXPTR, NULL); 673 } while (igotlock == 0); 674 NFSUNLOCKV4ROOTMUTEX(); 675 676 hp = NFSCLIENTHASH(clientid); 677 LIST_FOREACH(clp, hp, lc_hash) { 678 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 679 break; 680 } 681 if (clp == NULL) { 682 NFSLOCKV4ROOTMUTEX(); 683 nfsv4_unlock(&nfsv4rootfs_lock, 1); 684 NFSUNLOCKV4ROOTMUTEX(); 685 /* Just return ok, since it is gone. */ 686 goto out; 687 } 688 689 /* Scan for state on the clientid. */ 690 for (i = 0; i < NFSSTATEHASHSIZE; i++) 691 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 692 NFSLOCKV4ROOTMUTEX(); 693 nfsv4_unlock(&nfsv4rootfs_lock, 1); 694 NFSUNLOCKV4ROOTMUTEX(); 695 error = NFSERR_CLIENTIDBUSY; 696 goto out; 697 } 698 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 699 NFSLOCKV4ROOTMUTEX(); 700 nfsv4_unlock(&nfsv4rootfs_lock, 1); 701 NFSUNLOCKV4ROOTMUTEX(); 702 error = NFSERR_CLIENTIDBUSY; 703 goto out; 704 } 705 706 /* Destroy the clientid and return ok. */ 707 nfsrv_cleanclient(clp, p); 708 nfsrv_freedeleglist(&clp->lc_deleg); 709 nfsrv_freedeleglist(&clp->lc_olddeleg); 710 LIST_REMOVE(clp, lc_hash); 711 NFSLOCKV4ROOTMUTEX(); 712 nfsv4_unlock(&nfsv4rootfs_lock, 1); 713 NFSUNLOCKV4ROOTMUTEX(); 714 nfsrv_zapclient(clp, p); 715out: 716 NFSEXITCODE2(error, nd); 717 return (error); 718} 719 720/* 721 * Called from the new nfssvc syscall to admin revoke a clientid. 722 * Returns 0 for success, error otherwise. 723 */ 724APPLESTATIC int 725nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 726{ 727 struct nfsclient *clp = NULL; 728 int i, error = 0; 729 int gotit, igotlock; 730 731 /* 732 * First, lock out the nfsd so that state won't change while the 733 * revocation record is being written to the stable storage restart 734 * file. 735 */ 736 NFSLOCKV4ROOTMUTEX(); 737 do { 738 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 739 NFSV4ROOTLOCKMUTEXPTR, NULL); 740 } while (!igotlock); 741 NFSUNLOCKV4ROOTMUTEX(); 742 743 /* 744 * Search for a match in the client list. 745 */ 746 gotit = i = 0; 747 while (i < NFSCLIENTHASHSIZE && !gotit) { 748 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 749 if (revokep->nclid_idlen == clp->lc_idlen && 750 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 751 gotit = 1; 752 break; 753 } 754 } 755 i++; 756 } 757 if (!gotit) { 758 NFSLOCKV4ROOTMUTEX(); 759 nfsv4_unlock(&nfsv4rootfs_lock, 0); 760 NFSUNLOCKV4ROOTMUTEX(); 761 error = EPERM; 762 goto out; 763 } 764 765 /* 766 * Now, write out the revocation record 767 */ 768 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 769 nfsrv_backupstable(); 770 771 /* 772 * and clear out the state, marking the clientid revoked. 773 */ 774 clp->lc_flags &= ~LCL_CALLBACKSON; 775 clp->lc_flags |= LCL_ADMINREVOKED; 776 nfsrv_cleanclient(clp, p); 777 nfsrv_freedeleglist(&clp->lc_deleg); 778 nfsrv_freedeleglist(&clp->lc_olddeleg); 779 NFSLOCKV4ROOTMUTEX(); 780 nfsv4_unlock(&nfsv4rootfs_lock, 0); 781 NFSUNLOCKV4ROOTMUTEX(); 782 783out: 784 NFSEXITCODE(error); 785 return (error); 786} 787 788/* 789 * Dump out stats for all clients. Called from nfssvc(2), that is used 790 * newnfsstats. 791 */ 792APPLESTATIC void 793nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 794{ 795 struct nfsclient *clp; 796 int i = 0, cnt = 0; 797 798 /* 799 * First, get a reference on the nfsv4rootfs_lock so that an 800 * exclusive lock cannot be acquired while dumping the clients. 801 */ 802 NFSLOCKV4ROOTMUTEX(); 803 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 804 NFSUNLOCKV4ROOTMUTEX(); 805 NFSLOCKSTATE(); 806 /* 807 * Rattle through the client lists until done. 808 */ 809 while (i < NFSCLIENTHASHSIZE && cnt < maxcnt) { 810 clp = LIST_FIRST(&nfsclienthash[i]); 811 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 812 nfsrv_dumpaclient(clp, &dumpp[cnt]); 813 cnt++; 814 clp = LIST_NEXT(clp, lc_hash); 815 } 816 i++; 817 } 818 if (cnt < maxcnt) 819 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 820 NFSUNLOCKSTATE(); 821 NFSLOCKV4ROOTMUTEX(); 822 nfsv4_relref(&nfsv4rootfs_lock); 823 NFSUNLOCKV4ROOTMUTEX(); 824} 825 826/* 827 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 828 */ 829static void 830nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 831{ 832 struct nfsstate *stp, *openstp, *lckownstp; 833 struct nfslock *lop; 834 struct sockaddr *sad; 835 struct sockaddr_in *rad; 836 struct sockaddr_in6 *rad6; 837 838 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 839 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 840 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 841 dumpp->ndcl_flags = clp->lc_flags; 842 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 843 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 844 sad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr *); 845 dumpp->ndcl_addrfam = sad->sa_family; 846 if (sad->sa_family == AF_INET) { 847 rad = (struct sockaddr_in *)sad; 848 dumpp->ndcl_cbaddr.sin_addr = rad->sin_addr; 849 } else { 850 rad6 = (struct sockaddr_in6 *)sad; 851 dumpp->ndcl_cbaddr.sin6_addr = rad6->sin6_addr; 852 } 853 854 /* 855 * Now, scan the state lists and total up the opens and locks. 856 */ 857 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 858 dumpp->ndcl_nopenowners++; 859 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 860 dumpp->ndcl_nopens++; 861 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 862 dumpp->ndcl_nlockowners++; 863 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 864 dumpp->ndcl_nlocks++; 865 } 866 } 867 } 868 } 869 870 /* 871 * and the delegation lists. 872 */ 873 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 874 dumpp->ndcl_ndelegs++; 875 } 876 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 877 dumpp->ndcl_nolddelegs++; 878 } 879} 880 881/* 882 * Dump out lock stats for a file. 883 */ 884APPLESTATIC void 885nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 886 NFSPROC_T *p) 887{ 888 struct nfsstate *stp; 889 struct nfslock *lop; 890 int cnt = 0; 891 struct nfslockfile *lfp; 892 struct sockaddr *sad; 893 struct sockaddr_in *rad; 894 struct sockaddr_in6 *rad6; 895 int ret; 896 fhandle_t nfh; 897 898 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 899 /* 900 * First, get a reference on the nfsv4rootfs_lock so that an 901 * exclusive lock on it cannot be acquired while dumping the locks. 902 */ 903 NFSLOCKV4ROOTMUTEX(); 904 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 905 NFSUNLOCKV4ROOTMUTEX(); 906 NFSLOCKSTATE(); 907 if (!ret) 908 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 909 if (ret) { 910 ldumpp[0].ndlck_clid.nclid_idlen = 0; 911 NFSUNLOCKSTATE(); 912 NFSLOCKV4ROOTMUTEX(); 913 nfsv4_relref(&nfsv4rootfs_lock); 914 NFSUNLOCKV4ROOTMUTEX(); 915 return; 916 } 917 918 /* 919 * For each open share on file, dump it out. 920 */ 921 stp = LIST_FIRST(&lfp->lf_open); 922 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 923 ldumpp[cnt].ndlck_flags = stp->ls_flags; 924 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 925 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 926 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 927 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 928 ldumpp[cnt].ndlck_owner.nclid_idlen = 929 stp->ls_openowner->ls_ownerlen; 930 NFSBCOPY(stp->ls_openowner->ls_owner, 931 ldumpp[cnt].ndlck_owner.nclid_id, 932 stp->ls_openowner->ls_ownerlen); 933 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 934 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 935 stp->ls_clp->lc_idlen); 936 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 937 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 938 if (sad->sa_family == AF_INET) { 939 rad = (struct sockaddr_in *)sad; 940 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 941 } else { 942 rad6 = (struct sockaddr_in6 *)sad; 943 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 944 } 945 stp = LIST_NEXT(stp, ls_file); 946 cnt++; 947 } 948 949 /* 950 * and all locks. 951 */ 952 lop = LIST_FIRST(&lfp->lf_lock); 953 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 954 stp = lop->lo_stp; 955 ldumpp[cnt].ndlck_flags = lop->lo_flags; 956 ldumpp[cnt].ndlck_first = lop->lo_first; 957 ldumpp[cnt].ndlck_end = lop->lo_end; 958 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 959 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 960 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 961 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 962 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 963 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 964 stp->ls_ownerlen); 965 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 966 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 967 stp->ls_clp->lc_idlen); 968 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 969 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 970 if (sad->sa_family == AF_INET) { 971 rad = (struct sockaddr_in *)sad; 972 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 973 } else { 974 rad6 = (struct sockaddr_in6 *)sad; 975 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 976 } 977 lop = LIST_NEXT(lop, lo_lckfile); 978 cnt++; 979 } 980 981 /* 982 * and the delegations. 983 */ 984 stp = LIST_FIRST(&lfp->lf_deleg); 985 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 986 ldumpp[cnt].ndlck_flags = stp->ls_flags; 987 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 988 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 989 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 990 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 991 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 992 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 993 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 994 stp->ls_clp->lc_idlen); 995 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 996 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 997 if (sad->sa_family == AF_INET) { 998 rad = (struct sockaddr_in *)sad; 999 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 1000 } else { 1001 rad6 = (struct sockaddr_in6 *)sad; 1002 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 1003 } 1004 stp = LIST_NEXT(stp, ls_file); 1005 cnt++; 1006 } 1007 1008 /* 1009 * If list isn't full, mark end of list by setting the client name 1010 * to zero length. 1011 */ 1012 if (cnt < maxcnt) 1013 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1014 NFSUNLOCKSTATE(); 1015 NFSLOCKV4ROOTMUTEX(); 1016 nfsv4_relref(&nfsv4rootfs_lock); 1017 NFSUNLOCKV4ROOTMUTEX(); 1018} 1019 1020/* 1021 * Server timer routine. It can scan any linked list, so long 1022 * as it holds the spin/mutex lock and there is no exclusive lock on 1023 * nfsv4rootfs_lock. 1024 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1025 * to do this from a callout, since the spin locks work. For 1026 * Darwin, I'm not sure what will work correctly yet.) 1027 * Should be called once per second. 1028 */ 1029APPLESTATIC void 1030nfsrv_servertimer(void) 1031{ 1032 struct nfsclient *clp, *nclp; 1033 struct nfsstate *stp, *nstp; 1034 int got_ref, i; 1035 1036 /* 1037 * Make sure nfsboottime is set. This is used by V3 as well 1038 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1039 * only used by the V4 server for leases. 1040 */ 1041 if (nfsboottime.tv_sec == 0) 1042 NFSSETBOOTTIME(nfsboottime); 1043 1044 /* 1045 * If server hasn't started yet, just return. 1046 */ 1047 NFSLOCKSTATE(); 1048 if (nfsrv_stablefirst.nsf_eograce == 0) { 1049 NFSUNLOCKSTATE(); 1050 return; 1051 } 1052 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 1053 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 1054 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 1055 nfsrv_stablefirst.nsf_flags |= 1056 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1057 NFSUNLOCKSTATE(); 1058 return; 1059 } 1060 1061 /* 1062 * Try and get a reference count on the nfsv4rootfs_lock so that 1063 * no nfsd thread can acquire an exclusive lock on it before this 1064 * call is done. If it is already exclusively locked, just return. 1065 */ 1066 NFSLOCKV4ROOTMUTEX(); 1067 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1068 NFSUNLOCKV4ROOTMUTEX(); 1069 if (got_ref == 0) { 1070 NFSUNLOCKSTATE(); 1071 return; 1072 } 1073 1074 /* 1075 * For each client... 1076 */ 1077 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 1078 clp = LIST_FIRST(&nfsclienthash[i]); 1079 while (clp != LIST_END(&nfsclienthash[i])) { 1080 nclp = LIST_NEXT(clp, lc_hash); 1081 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1082 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1083 && ((LIST_EMPTY(&clp->lc_deleg) 1084 && LIST_EMPTY(&clp->lc_open)) || 1085 nfsrv_clients > nfsrv_clienthighwater)) || 1086 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1087 (clp->lc_expiry < NFSD_MONOSEC && 1088 (nfsrv_openpluslock * 10 / 9) > NFSRV_V4STATELIMIT)) { 1089 /* 1090 * Lease has expired several nfsrv_lease times ago: 1091 * PLUS 1092 * - no state is associated with it 1093 * OR 1094 * - above high water mark for number of clients 1095 * (nfsrv_clienthighwater should be large enough 1096 * that this only occurs when clients fail to 1097 * use the same nfs_client_id4.id. Maybe somewhat 1098 * higher that the maximum number of clients that 1099 * will mount this server?) 1100 * OR 1101 * Lease has expired a very long time ago 1102 * OR 1103 * Lease has expired PLUS the number of opens + locks 1104 * has exceeded 90% of capacity 1105 * 1106 * --> Mark for expiry. The actual expiry will be done 1107 * by an nfsd sometime soon. 1108 */ 1109 clp->lc_flags |= LCL_EXPIREIT; 1110 nfsrv_stablefirst.nsf_flags |= 1111 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1112 } else { 1113 /* 1114 * If there are no opens, increment no open tick cnt 1115 * If time exceeds NFSNOOPEN, mark it to be thrown away 1116 * otherwise, if there is an open, reset no open time 1117 * Hopefully, this will avoid excessive re-creation 1118 * of open owners and subsequent open confirms. 1119 */ 1120 stp = LIST_FIRST(&clp->lc_open); 1121 while (stp != LIST_END(&clp->lc_open)) { 1122 nstp = LIST_NEXT(stp, ls_list); 1123 if (LIST_EMPTY(&stp->ls_open)) { 1124 stp->ls_noopens++; 1125 if (stp->ls_noopens > NFSNOOPEN || 1126 (nfsrv_openpluslock * 2) > 1127 NFSRV_V4STATELIMIT) 1128 nfsrv_stablefirst.nsf_flags |= 1129 NFSNSF_NOOPENS; 1130 } else { 1131 stp->ls_noopens = 0; 1132 } 1133 stp = nstp; 1134 } 1135 } 1136 } 1137 clp = nclp; 1138 } 1139 } 1140 NFSUNLOCKSTATE(); 1141 NFSLOCKV4ROOTMUTEX(); 1142 nfsv4_relref(&nfsv4rootfs_lock); 1143 NFSUNLOCKV4ROOTMUTEX(); 1144} 1145 1146/* 1147 * The following set of functions free up the various data structures. 1148 */ 1149/* 1150 * Clear out all open/lock state related to this nfsclient. 1151 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1152 * there are no other active nfsd threads. 1153 */ 1154APPLESTATIC void 1155nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1156{ 1157 struct nfsstate *stp, *nstp; 1158 struct nfsdsession *sep, *nsep; 1159 1160 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1161 nfsrv_freeopenowner(stp, 1, p); 1162 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1163 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1164 (void)nfsrv_freesession(sep, NULL); 1165} 1166 1167/* 1168 * Free a client that has been cleaned. It should also already have been 1169 * removed from the lists. 1170 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1171 * softclock interrupts are enabled.) 1172 */ 1173APPLESTATIC void 1174nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1175{ 1176 1177#ifdef notyet 1178 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1179 (LCL_GSS | LCL_CALLBACKSON) && 1180 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1181 clp->lc_handlelen > 0) { 1182 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1183 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1184 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1185 NULL, 0, NULL, NULL, NULL, p); 1186 } 1187#endif 1188 newnfs_disconnect(&clp->lc_req); 1189 NFSSOCKADDRFREE(clp->lc_req.nr_nam); 1190 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1191 free((caddr_t)clp, M_NFSDCLIENT); 1192 NFSLOCKSTATE(); 1193 newnfsstats.srvclients--; 1194 nfsrv_openpluslock--; 1195 nfsrv_clients--; 1196 NFSUNLOCKSTATE(); 1197} 1198 1199/* 1200 * Free a list of delegation state structures. 1201 * (This function will also free all nfslockfile structures that no 1202 * longer have associated state.) 1203 */ 1204APPLESTATIC void 1205nfsrv_freedeleglist(struct nfsstatehead *sthp) 1206{ 1207 struct nfsstate *stp, *nstp; 1208 1209 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1210 nfsrv_freedeleg(stp); 1211 } 1212 LIST_INIT(sthp); 1213} 1214 1215/* 1216 * Free up a delegation. 1217 */ 1218static void 1219nfsrv_freedeleg(struct nfsstate *stp) 1220{ 1221 struct nfslockfile *lfp; 1222 1223 LIST_REMOVE(stp, ls_hash); 1224 LIST_REMOVE(stp, ls_list); 1225 LIST_REMOVE(stp, ls_file); 1226 lfp = stp->ls_lfp; 1227 if (LIST_EMPTY(&lfp->lf_open) && 1228 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1229 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1230 lfp->lf_usecount == 0 && 1231 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1232 nfsrv_freenfslockfile(lfp); 1233 FREE((caddr_t)stp, M_NFSDSTATE); 1234 newnfsstats.srvdelegates--; 1235 nfsrv_openpluslock--; 1236 nfsrv_delegatecnt--; 1237} 1238 1239/* 1240 * This function frees an open owner and all associated opens. 1241 */ 1242static void 1243nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1244{ 1245 struct nfsstate *nstp, *tstp; 1246 1247 LIST_REMOVE(stp, ls_list); 1248 /* 1249 * Now, free all associated opens. 1250 */ 1251 nstp = LIST_FIRST(&stp->ls_open); 1252 while (nstp != LIST_END(&stp->ls_open)) { 1253 tstp = nstp; 1254 nstp = LIST_NEXT(nstp, ls_list); 1255 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1256 } 1257 if (stp->ls_op) 1258 nfsrvd_derefcache(stp->ls_op); 1259 FREE((caddr_t)stp, M_NFSDSTATE); 1260 newnfsstats.srvopenowners--; 1261 nfsrv_openpluslock--; 1262} 1263 1264/* 1265 * This function frees an open (nfsstate open structure) with all associated 1266 * lock_owners and locks. It also frees the nfslockfile structure iff there 1267 * are no other opens on the file. 1268 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1269 */ 1270static int 1271nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1272{ 1273 struct nfsstate *nstp, *tstp; 1274 struct nfslockfile *lfp; 1275 int ret; 1276 1277 LIST_REMOVE(stp, ls_hash); 1278 LIST_REMOVE(stp, ls_list); 1279 LIST_REMOVE(stp, ls_file); 1280 1281 lfp = stp->ls_lfp; 1282 /* 1283 * Now, free all lockowners associated with this open. 1284 */ 1285 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1286 nfsrv_freelockowner(tstp, vp, cansleep, p); 1287 1288 /* 1289 * The nfslockfile is freed here if there are no locks 1290 * associated with the open. 1291 * If there are locks associated with the open, the 1292 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1293 * Acquire the state mutex to avoid races with calls to 1294 * nfsrv_getlockfile(). 1295 */ 1296 if (cansleep != 0) 1297 NFSLOCKSTATE(); 1298 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1299 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1300 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1301 lfp->lf_usecount == 0 && 1302 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1303 nfsrv_freenfslockfile(lfp); 1304 ret = 1; 1305 } else 1306 ret = 0; 1307 if (cansleep != 0) 1308 NFSUNLOCKSTATE(); 1309 FREE((caddr_t)stp, M_NFSDSTATE); 1310 newnfsstats.srvopens--; 1311 nfsrv_openpluslock--; 1312 return (ret); 1313} 1314 1315/* 1316 * Frees a lockowner and all associated locks. 1317 */ 1318static void 1319nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1320 NFSPROC_T *p) 1321{ 1322 1323 LIST_REMOVE(stp, ls_hash); 1324 LIST_REMOVE(stp, ls_list); 1325 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1326 if (stp->ls_op) 1327 nfsrvd_derefcache(stp->ls_op); 1328 FREE((caddr_t)stp, M_NFSDSTATE); 1329 newnfsstats.srvlockowners--; 1330 nfsrv_openpluslock--; 1331} 1332 1333/* 1334 * Free all the nfs locks on a lockowner. 1335 */ 1336static void 1337nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1338 NFSPROC_T *p) 1339{ 1340 struct nfslock *lop, *nlop; 1341 struct nfsrollback *rlp, *nrlp; 1342 struct nfslockfile *lfp = NULL; 1343 int gottvp = 0; 1344 vnode_t tvp = NULL; 1345 uint64_t first, end; 1346 1347 lop = LIST_FIRST(&stp->ls_lock); 1348 while (lop != LIST_END(&stp->ls_lock)) { 1349 nlop = LIST_NEXT(lop, lo_lckowner); 1350 /* 1351 * Since all locks should be for the same file, lfp should 1352 * not change. 1353 */ 1354 if (lfp == NULL) 1355 lfp = lop->lo_lfp; 1356 else if (lfp != lop->lo_lfp) 1357 panic("allnfslocks"); 1358 /* 1359 * If vp is NULL and cansleep != 0, a vnode must be acquired 1360 * from the file handle. This only occurs when called from 1361 * nfsrv_cleanclient(). 1362 */ 1363 if (gottvp == 0) { 1364 if (nfsrv_dolocallocks == 0) 1365 tvp = NULL; 1366 else if (vp == NULL && cansleep != 0) 1367 tvp = nfsvno_getvp(&lfp->lf_fh); 1368 else 1369 tvp = vp; 1370 gottvp = 1; 1371 } 1372 1373 if (tvp != NULL) { 1374 if (cansleep == 0) 1375 panic("allnfs2"); 1376 first = lop->lo_first; 1377 end = lop->lo_end; 1378 nfsrv_freenfslock(lop); 1379 nfsrv_localunlock(tvp, lfp, first, end, p); 1380 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1381 nrlp) 1382 free(rlp, M_NFSDROLLBACK); 1383 LIST_INIT(&lfp->lf_rollback); 1384 } else 1385 nfsrv_freenfslock(lop); 1386 lop = nlop; 1387 } 1388 if (vp == NULL && tvp != NULL) 1389 vput(tvp); 1390} 1391 1392/* 1393 * Free an nfslock structure. 1394 */ 1395static void 1396nfsrv_freenfslock(struct nfslock *lop) 1397{ 1398 1399 if (lop->lo_lckfile.le_prev != NULL) { 1400 LIST_REMOVE(lop, lo_lckfile); 1401 newnfsstats.srvlocks--; 1402 nfsrv_openpluslock--; 1403 } 1404 LIST_REMOVE(lop, lo_lckowner); 1405 FREE((caddr_t)lop, M_NFSDLOCK); 1406} 1407 1408/* 1409 * This function frees an nfslockfile structure. 1410 */ 1411static void 1412nfsrv_freenfslockfile(struct nfslockfile *lfp) 1413{ 1414 1415 LIST_REMOVE(lfp, lf_hash); 1416 FREE((caddr_t)lfp, M_NFSDLOCKFILE); 1417} 1418 1419/* 1420 * This function looks up an nfsstate structure via stateid. 1421 */ 1422static int 1423nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1424 struct nfsstate **stpp) 1425{ 1426 struct nfsstate *stp; 1427 struct nfsstatehead *hp; 1428 int error = 0; 1429 1430 *stpp = NULL; 1431 hp = NFSSTATEHASH(clp, *stateidp); 1432 LIST_FOREACH(stp, hp, ls_hash) { 1433 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1434 NFSX_STATEIDOTHER)) 1435 break; 1436 } 1437 1438 /* 1439 * If no state id in list, return NFSERR_BADSTATEID. 1440 */ 1441 if (stp == LIST_END(hp)) { 1442 error = NFSERR_BADSTATEID; 1443 goto out; 1444 } 1445 *stpp = stp; 1446 1447out: 1448 NFSEXITCODE(error); 1449 return (error); 1450} 1451 1452/* 1453 * This function gets an nfsstate structure via owner string. 1454 */ 1455static void 1456nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1457 struct nfsstate **stpp) 1458{ 1459 struct nfsstate *stp; 1460 1461 *stpp = NULL; 1462 LIST_FOREACH(stp, hp, ls_list) { 1463 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1464 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1465 *stpp = stp; 1466 return; 1467 } 1468 } 1469} 1470 1471/* 1472 * Lock control function called to update lock status. 1473 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1474 * that one isn't to be created and an NFSERR_xxx for other errors. 1475 * The structures new_stp and new_lop are passed in as pointers that should 1476 * be set to NULL if the structure is used and shouldn't be free'd. 1477 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1478 * never used and can safely be allocated on the stack. For all other 1479 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1480 * in case they are used. 1481 */ 1482APPLESTATIC int 1483nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1484 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1485 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1486 __unused struct nfsexstuff *exp, 1487 struct nfsrv_descript *nd, NFSPROC_T *p) 1488{ 1489 struct nfslock *lop; 1490 struct nfsstate *new_stp = *new_stpp; 1491 struct nfslock *new_lop = *new_lopp; 1492 struct nfsstate *tstp, *mystp, *nstp; 1493 int specialid = 0; 1494 struct nfslockfile *lfp; 1495 struct nfslock *other_lop = NULL; 1496 struct nfsstate *stp, *lckstp = NULL; 1497 struct nfsclient *clp = NULL; 1498 u_int32_t bits; 1499 int error = 0, haslock = 0, ret, reterr; 1500 int getlckret, delegation = 0, filestruct_locked; 1501 fhandle_t nfh; 1502 uint64_t first, end; 1503 uint32_t lock_flags; 1504 1505 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1506 /* 1507 * Note the special cases of "all 1s" or "all 0s" stateids and 1508 * let reads with all 1s go ahead. 1509 */ 1510 if (new_stp->ls_stateid.seqid == 0x0 && 1511 new_stp->ls_stateid.other[0] == 0x0 && 1512 new_stp->ls_stateid.other[1] == 0x0 && 1513 new_stp->ls_stateid.other[2] == 0x0) 1514 specialid = 1; 1515 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1516 new_stp->ls_stateid.other[0] == 0xffffffff && 1517 new_stp->ls_stateid.other[1] == 0xffffffff && 1518 new_stp->ls_stateid.other[2] == 0xffffffff) 1519 specialid = 2; 1520 } 1521 1522 /* 1523 * Check for restart conditions (client and server). 1524 */ 1525 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1526 &new_stp->ls_stateid, specialid); 1527 if (error) 1528 goto out; 1529 1530 /* 1531 * Check for state resource limit exceeded. 1532 */ 1533 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1534 nfsrv_openpluslock > NFSRV_V4STATELIMIT) { 1535 error = NFSERR_RESOURCE; 1536 goto out; 1537 } 1538 1539 /* 1540 * For the lock case, get another nfslock structure, 1541 * just in case we need it. 1542 * Malloc now, before we start sifting through the linked lists, 1543 * in case we have to wait for memory. 1544 */ 1545tryagain: 1546 if (new_stp->ls_flags & NFSLCK_LOCK) 1547 MALLOC(other_lop, struct nfslock *, sizeof (struct nfslock), 1548 M_NFSDLOCK, M_WAITOK); 1549 filestruct_locked = 0; 1550 reterr = 0; 1551 lfp = NULL; 1552 1553 /* 1554 * Get the lockfile structure for CFH now, so we can do a sanity 1555 * check against the stateid, before incrementing the seqid#, since 1556 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1557 * shouldn't be incremented for this case. 1558 * If nfsrv_getlockfile() returns -1, it means "not found", which 1559 * will be handled later. 1560 * If we are doing Lock/LockU and local locking is enabled, sleep 1561 * lock the nfslockfile structure. 1562 */ 1563 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1564 NFSLOCKSTATE(); 1565 if (getlckret == 0) { 1566 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1567 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1568 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1569 &lfp, &nfh, 1); 1570 if (getlckret == 0) 1571 filestruct_locked = 1; 1572 } else 1573 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1574 &lfp, &nfh, 0); 1575 } 1576 if (getlckret != 0 && getlckret != -1) 1577 reterr = getlckret; 1578 1579 if (filestruct_locked != 0) { 1580 LIST_INIT(&lfp->lf_rollback); 1581 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1582 /* 1583 * For local locking, do the advisory locking now, so 1584 * that any conflict can be detected. A failure later 1585 * can be rolled back locally. If an error is returned, 1586 * struct nfslockfile has been unlocked and any local 1587 * locking rolled back. 1588 */ 1589 NFSUNLOCKSTATE(); 1590 reterr = nfsrv_locallock(vp, lfp, 1591 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1592 new_lop->lo_first, new_lop->lo_end, cfp, p); 1593 NFSLOCKSTATE(); 1594 } 1595 } 1596 1597 if (specialid == 0) { 1598 if (new_stp->ls_flags & NFSLCK_TEST) { 1599 /* 1600 * RFC 3530 does not list LockT as an op that renews a 1601 * lease, but the concensus seems to be that it is ok 1602 * for a server to do so. 1603 */ 1604 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1605 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1606 1607 /* 1608 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1609 * error returns for LockT, just go ahead and test for a lock, 1610 * since there are no locks for this client, but other locks 1611 * can conflict. (ie. same client will always be false) 1612 */ 1613 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1614 error = 0; 1615 lckstp = new_stp; 1616 } else { 1617 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1618 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1619 if (error == 0) 1620 /* 1621 * Look up the stateid 1622 */ 1623 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1624 new_stp->ls_flags, &stp); 1625 /* 1626 * do some sanity checks for an unconfirmed open or a 1627 * stateid that refers to the wrong file, for an open stateid 1628 */ 1629 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1630 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1631 (getlckret == 0 && stp->ls_lfp != lfp))) 1632 error = NFSERR_BADSTATEID; 1633 if (error == 0 && 1634 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1635 getlckret == 0 && stp->ls_lfp != lfp) 1636 error = NFSERR_BADSTATEID; 1637 1638 /* 1639 * If the lockowner stateid doesn't refer to the same file, 1640 * I believe that is considered ok, since some clients will 1641 * only create a single lockowner and use that for all locks 1642 * on all files. 1643 * For now, log it as a diagnostic, instead of considering it 1644 * a BadStateid. 1645 */ 1646 if (error == 0 && (stp->ls_flags & 1647 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1648 getlckret == 0 && stp->ls_lfp != lfp) { 1649#ifdef DIAGNOSTIC 1650 printf("Got a lock statid for different file open\n"); 1651#endif 1652 /* 1653 error = NFSERR_BADSTATEID; 1654 */ 1655 } 1656 1657 if (error == 0) { 1658 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1659 /* 1660 * If haslock set, we've already checked the seqid. 1661 */ 1662 if (!haslock) { 1663 if (stp->ls_flags & NFSLCK_OPEN) 1664 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1665 stp->ls_openowner, new_stp->ls_op); 1666 else 1667 error = NFSERR_BADSTATEID; 1668 } 1669 if (!error) 1670 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1671 if (lckstp) 1672 /* 1673 * I believe this should be an error, but it 1674 * isn't obvious what NFSERR_xxx would be 1675 * appropriate, so I'll use NFSERR_INVAL for now. 1676 */ 1677 error = NFSERR_INVAL; 1678 else 1679 lckstp = new_stp; 1680 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1681 /* 1682 * If haslock set, ditto above. 1683 */ 1684 if (!haslock) { 1685 if (stp->ls_flags & NFSLCK_OPEN) 1686 error = NFSERR_BADSTATEID; 1687 else 1688 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1689 stp, new_stp->ls_op); 1690 } 1691 lckstp = stp; 1692 } else { 1693 lckstp = stp; 1694 } 1695 } 1696 /* 1697 * If the seqid part of the stateid isn't the same, return 1698 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1699 * For I/O Ops, only return NFSERR_OLDSTATEID if 1700 * nfsrv_returnoldstateid is set. (The concensus on the email 1701 * list was that most clients would prefer to not receive 1702 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1703 * is what will happen, so I use the nfsrv_returnoldstateid to 1704 * allow for either server configuration.) 1705 */ 1706 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1707 (((nd->nd_flag & ND_NFSV41) == 0 && 1708 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1709 nfsrv_returnoldstateid)) || 1710 ((nd->nd_flag & ND_NFSV41) != 0 && 1711 new_stp->ls_stateid.seqid != 0))) 1712 error = NFSERR_OLDSTATEID; 1713 } 1714 } 1715 1716 /* 1717 * Now we can check for grace. 1718 */ 1719 if (!error) 1720 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1721 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1722 nfsrv_checkstable(clp)) 1723 error = NFSERR_NOGRACE; 1724 /* 1725 * If we successfully Reclaimed state, note that. 1726 */ 1727 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1728 nfsrv_markstable(clp); 1729 1730 /* 1731 * At this point, either error == NFSERR_BADSTATEID or the 1732 * seqid# has been updated, so we can return any error. 1733 * If error == 0, there may be an error in: 1734 * nd_repstat - Set by the calling function. 1735 * reterr - Set above, if getting the nfslockfile structure 1736 * or acquiring the local lock failed. 1737 * (If both of these are set, nd_repstat should probably be 1738 * returned, since that error was detected before this 1739 * function call.) 1740 */ 1741 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1742 if (error == 0) { 1743 if (nd->nd_repstat != 0) 1744 error = nd->nd_repstat; 1745 else 1746 error = reterr; 1747 } 1748 if (filestruct_locked != 0) { 1749 /* Roll back local locks. */ 1750 NFSUNLOCKSTATE(); 1751 nfsrv_locallock_rollback(vp, lfp, p); 1752 NFSLOCKSTATE(); 1753 nfsrv_unlocklf(lfp); 1754 } 1755 NFSUNLOCKSTATE(); 1756 goto out; 1757 } 1758 1759 /* 1760 * Check the nfsrv_getlockfile return. 1761 * Returned -1 if no structure found. 1762 */ 1763 if (getlckret == -1) { 1764 error = NFSERR_EXPIRED; 1765 /* 1766 * Called from lockt, so no lock is OK. 1767 */ 1768 if (new_stp->ls_flags & NFSLCK_TEST) { 1769 error = 0; 1770 } else if (new_stp->ls_flags & 1771 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1772 /* 1773 * Called to check for a lock, OK if the stateid is all 1774 * 1s or all 0s, but there should be an nfsstate 1775 * otherwise. 1776 * (ie. If there is no open, I'll assume no share 1777 * deny bits.) 1778 */ 1779 if (specialid) 1780 error = 0; 1781 else 1782 error = NFSERR_BADSTATEID; 1783 } 1784 NFSUNLOCKSTATE(); 1785 goto out; 1786 } 1787 1788 /* 1789 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 1790 * For NFSLCK_CHECK, allow a read if write access is granted, 1791 * but check for a deny. For NFSLCK_LOCK, require correct access, 1792 * which implies a conflicting deny can't exist. 1793 */ 1794 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 1795 /* 1796 * Four kinds of state id: 1797 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 1798 * - stateid for an open 1799 * - stateid for a delegation 1800 * - stateid for a lock owner 1801 */ 1802 if (!specialid) { 1803 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 1804 delegation = 1; 1805 mystp = stp; 1806 nfsrv_delaydelegtimeout(stp); 1807 } else if (stp->ls_flags & NFSLCK_OPEN) { 1808 mystp = stp; 1809 } else { 1810 mystp = stp->ls_openstp; 1811 } 1812 /* 1813 * If locking or checking, require correct access 1814 * bit set. 1815 */ 1816 if (((new_stp->ls_flags & NFSLCK_LOCK) && 1817 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 1818 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 1819 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 1820 (NFSLCK_CHECK | NFSLCK_READACCESS) && 1821 !(mystp->ls_flags & NFSLCK_READACCESS)) || 1822 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 1823 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 1824 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 1825 if (filestruct_locked != 0) { 1826 /* Roll back local locks. */ 1827 NFSUNLOCKSTATE(); 1828 nfsrv_locallock_rollback(vp, lfp, p); 1829 NFSLOCKSTATE(); 1830 nfsrv_unlocklf(lfp); 1831 } 1832 NFSUNLOCKSTATE(); 1833 error = NFSERR_OPENMODE; 1834 goto out; 1835 } 1836 } else 1837 mystp = NULL; 1838 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 1839 /* 1840 * Check for a conflicting deny bit. 1841 */ 1842 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 1843 if (tstp != mystp) { 1844 bits = tstp->ls_flags; 1845 bits >>= NFSLCK_SHIFT; 1846 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 1847 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 1848 vp, p); 1849 if (ret == 1) { 1850 /* 1851 * nfsrv_clientconflict unlocks state 1852 * when it returns non-zero. 1853 */ 1854 lckstp = NULL; 1855 goto tryagain; 1856 } 1857 if (ret == 0) 1858 NFSUNLOCKSTATE(); 1859 if (ret == 2) 1860 error = NFSERR_PERM; 1861 else 1862 error = NFSERR_OPENMODE; 1863 goto out; 1864 } 1865 } 1866 } 1867 1868 /* We're outta here */ 1869 NFSUNLOCKSTATE(); 1870 goto out; 1871 } 1872 } 1873 1874 /* 1875 * For setattr, just get rid of all the Delegations for other clients. 1876 */ 1877 if (new_stp->ls_flags & NFSLCK_SETATTR) { 1878 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 1879 if (ret) { 1880 /* 1881 * nfsrv_cleandeleg() unlocks state when it 1882 * returns non-zero. 1883 */ 1884 if (ret == -1) { 1885 lckstp = NULL; 1886 goto tryagain; 1887 } 1888 error = ret; 1889 goto out; 1890 } 1891 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 1892 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 1893 LIST_EMPTY(&lfp->lf_deleg))) { 1894 NFSUNLOCKSTATE(); 1895 goto out; 1896 } 1897 } 1898 1899 /* 1900 * Check for a conflicting delegation. If one is found, call 1901 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 1902 * been set yet, it will get the lock. Otherwise, it will recall 1903 * the delegation. Then, we try try again... 1904 * I currently believe the conflict algorithm to be: 1905 * For Lock Ops (Lock/LockT/LockU) 1906 * - there is a conflict iff a different client has a write delegation 1907 * For Reading (Read Op) 1908 * - there is a conflict iff a different client has a write delegation 1909 * (the specialids are always a different client) 1910 * For Writing (Write/Setattr of size) 1911 * - there is a conflict if a different client has any delegation 1912 * - there is a conflict if the same client has a read delegation 1913 * (I don't understand why this isn't allowed, but that seems to be 1914 * the current concensus?) 1915 */ 1916 tstp = LIST_FIRST(&lfp->lf_deleg); 1917 while (tstp != LIST_END(&lfp->lf_deleg)) { 1918 nstp = LIST_NEXT(tstp, ls_file); 1919 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 1920 ((new_stp->ls_flags & NFSLCK_CHECK) && 1921 (new_lop->lo_flags & NFSLCK_READ))) && 1922 clp != tstp->ls_clp && 1923 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 1924 ((new_stp->ls_flags & NFSLCK_CHECK) && 1925 (new_lop->lo_flags & NFSLCK_WRITE) && 1926 (clp != tstp->ls_clp || 1927 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 1928 if (filestruct_locked != 0) { 1929 /* Roll back local locks. */ 1930 NFSUNLOCKSTATE(); 1931 nfsrv_locallock_rollback(vp, lfp, p); 1932 NFSLOCKSTATE(); 1933 nfsrv_unlocklf(lfp); 1934 } 1935 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 1936 if (ret) { 1937 /* 1938 * nfsrv_delegconflict unlocks state when it 1939 * returns non-zero, which it always does. 1940 */ 1941 if (other_lop) { 1942 FREE((caddr_t)other_lop, M_NFSDLOCK); 1943 other_lop = NULL; 1944 } 1945 if (ret == -1) { 1946 lckstp = NULL; 1947 goto tryagain; 1948 } 1949 error = ret; 1950 goto out; 1951 } 1952 /* Never gets here. */ 1953 } 1954 tstp = nstp; 1955 } 1956 1957 /* 1958 * Handle the unlock case by calling nfsrv_updatelock(). 1959 * (Should I have done some access checking above for unlock? For now, 1960 * just let it happen.) 1961 */ 1962 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 1963 first = new_lop->lo_first; 1964 end = new_lop->lo_end; 1965 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 1966 stateidp->seqid = ++(stp->ls_stateid.seqid); 1967 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 1968 stateidp->seqid = stp->ls_stateid.seqid = 1; 1969 stateidp->other[0] = stp->ls_stateid.other[0]; 1970 stateidp->other[1] = stp->ls_stateid.other[1]; 1971 stateidp->other[2] = stp->ls_stateid.other[2]; 1972 if (filestruct_locked != 0) { 1973 NFSUNLOCKSTATE(); 1974 /* Update the local locks. */ 1975 nfsrv_localunlock(vp, lfp, first, end, p); 1976 NFSLOCKSTATE(); 1977 nfsrv_unlocklf(lfp); 1978 } 1979 NFSUNLOCKSTATE(); 1980 goto out; 1981 } 1982 1983 /* 1984 * Search for a conflicting lock. A lock conflicts if: 1985 * - the lock range overlaps and 1986 * - at least one lock is a write lock and 1987 * - it is not owned by the same lock owner 1988 */ 1989 if (!delegation) { 1990 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 1991 if (new_lop->lo_end > lop->lo_first && 1992 new_lop->lo_first < lop->lo_end && 1993 (new_lop->lo_flags == NFSLCK_WRITE || 1994 lop->lo_flags == NFSLCK_WRITE) && 1995 lckstp != lop->lo_stp && 1996 (clp != lop->lo_stp->ls_clp || 1997 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 1998 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 1999 lckstp->ls_ownerlen))) { 2000 if (other_lop) { 2001 FREE((caddr_t)other_lop, M_NFSDLOCK); 2002 other_lop = NULL; 2003 } 2004 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp,&haslock,vp,p); 2005 if (ret == 1) { 2006 if (filestruct_locked != 0) { 2007 /* Roll back local locks. */ 2008 nfsrv_locallock_rollback(vp, lfp, p); 2009 NFSLOCKSTATE(); 2010 nfsrv_unlocklf(lfp); 2011 NFSUNLOCKSTATE(); 2012 } 2013 /* 2014 * nfsrv_clientconflict() unlocks state when it 2015 * returns non-zero. 2016 */ 2017 lckstp = NULL; 2018 goto tryagain; 2019 } 2020 /* 2021 * Found a conflicting lock, so record the conflict and 2022 * return the error. 2023 */ 2024 if (cfp != NULL && ret == 0) { 2025 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2026 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2027 cfp->cl_first = lop->lo_first; 2028 cfp->cl_end = lop->lo_end; 2029 cfp->cl_flags = lop->lo_flags; 2030 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2031 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2032 cfp->cl_ownerlen); 2033 } 2034 if (ret == 2) 2035 error = NFSERR_PERM; 2036 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2037 error = NFSERR_RECLAIMCONFLICT; 2038 else if (new_stp->ls_flags & NFSLCK_CHECK) 2039 error = NFSERR_LOCKED; 2040 else 2041 error = NFSERR_DENIED; 2042 if (filestruct_locked != 0 && ret == 0) { 2043 /* Roll back local locks. */ 2044 NFSUNLOCKSTATE(); 2045 nfsrv_locallock_rollback(vp, lfp, p); 2046 NFSLOCKSTATE(); 2047 nfsrv_unlocklf(lfp); 2048 } 2049 if (ret == 0) 2050 NFSUNLOCKSTATE(); 2051 goto out; 2052 } 2053 } 2054 } 2055 2056 /* 2057 * We only get here if there was no lock that conflicted. 2058 */ 2059 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2060 NFSUNLOCKSTATE(); 2061 goto out; 2062 } 2063 2064 /* 2065 * We only get here when we are creating or modifying a lock. 2066 * There are two variants: 2067 * - exist_lock_owner where lock_owner exists 2068 * - open_to_lock_owner with new lock_owner 2069 */ 2070 first = new_lop->lo_first; 2071 end = new_lop->lo_end; 2072 lock_flags = new_lop->lo_flags; 2073 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2074 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2075 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2076 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2077 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2078 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2079 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2080 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2081 } else { 2082 /* 2083 * The new open_to_lock_owner case. 2084 * Link the new nfsstate into the lists. 2085 */ 2086 new_stp->ls_seq = new_stp->ls_opentolockseq; 2087 nfsrvd_refcache(new_stp->ls_op); 2088 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2089 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2090 clp->lc_clientid.lval[0]; 2091 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2092 clp->lc_clientid.lval[1]; 2093 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2094 nfsrv_nextstateindex(clp); 2095 new_stp->ls_clp = clp; 2096 LIST_INIT(&new_stp->ls_lock); 2097 new_stp->ls_openstp = stp; 2098 new_stp->ls_lfp = lfp; 2099 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2100 lfp); 2101 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2102 new_stp, ls_hash); 2103 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2104 *new_lopp = NULL; 2105 *new_stpp = NULL; 2106 newnfsstats.srvlockowners++; 2107 nfsrv_openpluslock++; 2108 } 2109 if (filestruct_locked != 0) { 2110 NFSUNLOCKSTATE(); 2111 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2112 NFSLOCKSTATE(); 2113 nfsrv_unlocklf(lfp); 2114 } 2115 NFSUNLOCKSTATE(); 2116 2117out: 2118 if (haslock) { 2119 NFSLOCKV4ROOTMUTEX(); 2120 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2121 NFSUNLOCKV4ROOTMUTEX(); 2122 } 2123 if (other_lop) 2124 FREE((caddr_t)other_lop, M_NFSDLOCK); 2125 NFSEXITCODE2(error, nd); 2126 return (error); 2127} 2128 2129/* 2130 * Check for state errors for Open. 2131 * repstat is passed back out as an error if more critical errors 2132 * are not detected. 2133 */ 2134APPLESTATIC int 2135nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2136 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2137 NFSPROC_T *p, int repstat) 2138{ 2139 struct nfsstate *stp, *nstp; 2140 struct nfsclient *clp; 2141 struct nfsstate *ownerstp; 2142 struct nfslockfile *lfp, *new_lfp; 2143 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2144 2145 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2146 readonly = 1; 2147 /* 2148 * Check for restart conditions (client and server). 2149 */ 2150 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2151 &new_stp->ls_stateid, 0); 2152 if (error) 2153 goto out; 2154 2155 /* 2156 * Check for state resource limit exceeded. 2157 * Technically this should be SMP protected, but the worst 2158 * case error is "out by one or two" on the count when it 2159 * returns NFSERR_RESOURCE and the limit is just a rather 2160 * arbitrary high water mark, so no harm is done. 2161 */ 2162 if (nfsrv_openpluslock > NFSRV_V4STATELIMIT) { 2163 error = NFSERR_RESOURCE; 2164 goto out; 2165 } 2166 2167tryagain: 2168 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2169 M_NFSDLOCKFILE, M_WAITOK); 2170 if (vp) 2171 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2172 NULL, p); 2173 NFSLOCKSTATE(); 2174 /* 2175 * Get the nfsclient structure. 2176 */ 2177 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2178 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2179 2180 /* 2181 * Look up the open owner. See if it needs confirmation and 2182 * check the seq#, as required. 2183 */ 2184 if (!error) 2185 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2186 2187 if (!error && ownerstp) { 2188 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2189 new_stp->ls_op); 2190 /* 2191 * If the OpenOwner hasn't been confirmed, assume the 2192 * old one was a replay and this one is ok. 2193 * See: RFC3530 Sec. 14.2.18. 2194 */ 2195 if (error == NFSERR_BADSEQID && 2196 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2197 error = 0; 2198 } 2199 2200 /* 2201 * Check for grace. 2202 */ 2203 if (!error) 2204 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2205 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2206 nfsrv_checkstable(clp)) 2207 error = NFSERR_NOGRACE; 2208 2209 /* 2210 * If none of the above errors occurred, let repstat be 2211 * returned. 2212 */ 2213 if (repstat && !error) 2214 error = repstat; 2215 if (error) { 2216 NFSUNLOCKSTATE(); 2217 if (haslock) { 2218 NFSLOCKV4ROOTMUTEX(); 2219 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2220 NFSUNLOCKV4ROOTMUTEX(); 2221 } 2222 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2223 goto out; 2224 } 2225 2226 /* 2227 * If vp == NULL, the file doesn't exist yet, so return ok. 2228 * (This always happens on the first pass, so haslock must be 0.) 2229 */ 2230 if (vp == NULL) { 2231 NFSUNLOCKSTATE(); 2232 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2233 goto out; 2234 } 2235 2236 /* 2237 * Get the structure for the underlying file. 2238 */ 2239 if (getfhret) 2240 error = getfhret; 2241 else 2242 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2243 NULL, 0); 2244 if (new_lfp) 2245 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2246 if (error) { 2247 NFSUNLOCKSTATE(); 2248 if (haslock) { 2249 NFSLOCKV4ROOTMUTEX(); 2250 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2251 NFSUNLOCKV4ROOTMUTEX(); 2252 } 2253 goto out; 2254 } 2255 2256 /* 2257 * Search for a conflicting open/share. 2258 */ 2259 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2260 /* 2261 * For Delegate_Cur, search for the matching Delegation, 2262 * which indicates no conflict. 2263 * An old delegation should have been recovered by the 2264 * client doing a Claim_DELEGATE_Prev, so I won't let 2265 * it match and return NFSERR_EXPIRED. Should I let it 2266 * match? 2267 */ 2268 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2269 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2270 (((nd->nd_flag & ND_NFSV41) != 0 && 2271 stateidp->seqid == 0) || 2272 stateidp->seqid == stp->ls_stateid.seqid) && 2273 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2274 NFSX_STATEIDOTHER)) 2275 break; 2276 } 2277 if (stp == LIST_END(&lfp->lf_deleg) || 2278 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2279 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2280 NFSUNLOCKSTATE(); 2281 if (haslock) { 2282 NFSLOCKV4ROOTMUTEX(); 2283 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2284 NFSUNLOCKV4ROOTMUTEX(); 2285 } 2286 error = NFSERR_EXPIRED; 2287 goto out; 2288 } 2289 } 2290 2291 /* 2292 * Check for access/deny bit conflicts. I check for the same 2293 * owner as well, in case the client didn't bother. 2294 */ 2295 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2296 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2297 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2298 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2299 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2300 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2301 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2302 if (ret == 1) { 2303 /* 2304 * nfsrv_clientconflict() unlocks 2305 * state when it returns non-zero. 2306 */ 2307 goto tryagain; 2308 } 2309 if (ret == 2) 2310 error = NFSERR_PERM; 2311 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2312 error = NFSERR_RECLAIMCONFLICT; 2313 else 2314 error = NFSERR_SHAREDENIED; 2315 if (ret == 0) 2316 NFSUNLOCKSTATE(); 2317 if (haslock) { 2318 NFSLOCKV4ROOTMUTEX(); 2319 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2320 NFSUNLOCKV4ROOTMUTEX(); 2321 } 2322 goto out; 2323 } 2324 } 2325 2326 /* 2327 * Check for a conflicting delegation. If one is found, call 2328 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2329 * been set yet, it will get the lock. Otherwise, it will recall 2330 * the delegation. Then, we try try again... 2331 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2332 * isn't a conflict.) 2333 * I currently believe the conflict algorithm to be: 2334 * For Open with Read Access and Deny None 2335 * - there is a conflict iff a different client has a write delegation 2336 * For Open with other Write Access or any Deny except None 2337 * - there is a conflict if a different client has any delegation 2338 * - there is a conflict if the same client has a read delegation 2339 * (The current concensus is that this last case should be 2340 * considered a conflict since the client with a read delegation 2341 * could have done an Open with ReadAccess and WriteDeny 2342 * locally and then not have checked for the WriteDeny.) 2343 * Don't check for a Reclaim, since that will be dealt with 2344 * by nfsrv_openctrl(). 2345 */ 2346 if (!(new_stp->ls_flags & 2347 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2348 stp = LIST_FIRST(&lfp->lf_deleg); 2349 while (stp != LIST_END(&lfp->lf_deleg)) { 2350 nstp = LIST_NEXT(stp, ls_file); 2351 if ((readonly && stp->ls_clp != clp && 2352 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2353 (!readonly && (stp->ls_clp != clp || 2354 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2355 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2356 if (ret) { 2357 /* 2358 * nfsrv_delegconflict() unlocks state 2359 * when it returns non-zero. 2360 */ 2361 if (ret == -1) 2362 goto tryagain; 2363 error = ret; 2364 goto out; 2365 } 2366 } 2367 stp = nstp; 2368 } 2369 } 2370 NFSUNLOCKSTATE(); 2371 if (haslock) { 2372 NFSLOCKV4ROOTMUTEX(); 2373 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2374 NFSUNLOCKV4ROOTMUTEX(); 2375 } 2376 2377out: 2378 NFSEXITCODE2(error, nd); 2379 return (error); 2380} 2381 2382/* 2383 * Open control function to create/update open state for an open. 2384 */ 2385APPLESTATIC int 2386nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2387 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2388 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2389 NFSPROC_T *p, u_quad_t filerev) 2390{ 2391 struct nfsstate *new_stp = *new_stpp; 2392 struct nfsstate *stp, *nstp; 2393 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2394 struct nfslockfile *lfp, *new_lfp; 2395 struct nfsclient *clp; 2396 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2397 int readonly = 0, cbret = 1, getfhret = 0; 2398 2399 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2400 readonly = 1; 2401 /* 2402 * Check for restart conditions (client and server). 2403 * (Paranoia, should have been detected by nfsrv_opencheck().) 2404 * If an error does show up, return NFSERR_EXPIRED, since the 2405 * the seqid# has already been incremented. 2406 */ 2407 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2408 &new_stp->ls_stateid, 0); 2409 if (error) { 2410 printf("Nfsd: openctrl unexpected restart err=%d\n", 2411 error); 2412 error = NFSERR_EXPIRED; 2413 goto out; 2414 } 2415 2416tryagain: 2417 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2418 M_NFSDLOCKFILE, M_WAITOK); 2419 MALLOC(new_open, struct nfsstate *, sizeof (struct nfsstate), 2420 M_NFSDSTATE, M_WAITOK); 2421 MALLOC(new_deleg, struct nfsstate *, sizeof (struct nfsstate), 2422 M_NFSDSTATE, M_WAITOK); 2423 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2424 NULL, p); 2425 NFSLOCKSTATE(); 2426 /* 2427 * Get the client structure. Since the linked lists could be changed 2428 * by other nfsd processes if this process does a tsleep(), one of 2429 * two things must be done. 2430 * 1 - don't tsleep() 2431 * or 2432 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2433 * before using the lists, since this lock stops the other 2434 * nfsd. This should only be used for rare cases, since it 2435 * essentially single threads the nfsd. 2436 * At this time, it is only done for cases where the stable 2437 * storage file must be written prior to completion of state 2438 * expiration. 2439 */ 2440 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2441 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2442 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2443 clp->lc_program) { 2444 /* 2445 * This happens on the first open for a client 2446 * that supports callbacks. 2447 */ 2448 NFSUNLOCKSTATE(); 2449 /* 2450 * Although nfsrv_docallback() will sleep, clp won't 2451 * go away, since they are only removed when the 2452 * nfsv4_lock() has blocked the nfsd threads. The 2453 * fields in clp can change, but having multiple 2454 * threads do this Null callback RPC should be 2455 * harmless. 2456 */ 2457 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2458 NULL, 0, NULL, NULL, NULL, p); 2459 NFSLOCKSTATE(); 2460 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2461 if (!cbret) 2462 clp->lc_flags |= LCL_CALLBACKSON; 2463 } 2464 2465 /* 2466 * Look up the open owner. See if it needs confirmation and 2467 * check the seq#, as required. 2468 */ 2469 if (!error) 2470 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2471 2472 if (error) { 2473 NFSUNLOCKSTATE(); 2474 printf("Nfsd: openctrl unexpected state err=%d\n", 2475 error); 2476 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2477 free((caddr_t)new_open, M_NFSDSTATE); 2478 free((caddr_t)new_deleg, M_NFSDSTATE); 2479 if (haslock) { 2480 NFSLOCKV4ROOTMUTEX(); 2481 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2482 NFSUNLOCKV4ROOTMUTEX(); 2483 } 2484 error = NFSERR_EXPIRED; 2485 goto out; 2486 } 2487 2488 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2489 nfsrv_markstable(clp); 2490 2491 /* 2492 * Get the structure for the underlying file. 2493 */ 2494 if (getfhret) 2495 error = getfhret; 2496 else 2497 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2498 NULL, 0); 2499 if (new_lfp) 2500 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2501 if (error) { 2502 NFSUNLOCKSTATE(); 2503 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2504 error); 2505 free((caddr_t)new_open, M_NFSDSTATE); 2506 free((caddr_t)new_deleg, M_NFSDSTATE); 2507 if (haslock) { 2508 NFSLOCKV4ROOTMUTEX(); 2509 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2510 NFSUNLOCKV4ROOTMUTEX(); 2511 } 2512 goto out; 2513 } 2514 2515 /* 2516 * Search for a conflicting open/share. 2517 */ 2518 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2519 /* 2520 * For Delegate_Cur, search for the matching Delegation, 2521 * which indicates no conflict. 2522 * An old delegation should have been recovered by the 2523 * client doing a Claim_DELEGATE_Prev, so I won't let 2524 * it match and return NFSERR_EXPIRED. Should I let it 2525 * match? 2526 */ 2527 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2528 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2529 (((nd->nd_flag & ND_NFSV41) != 0 && 2530 stateidp->seqid == 0) || 2531 stateidp->seqid == stp->ls_stateid.seqid) && 2532 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2533 NFSX_STATEIDOTHER)) 2534 break; 2535 } 2536 if (stp == LIST_END(&lfp->lf_deleg) || 2537 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2538 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2539 NFSUNLOCKSTATE(); 2540 printf("Nfsd openctrl unexpected expiry\n"); 2541 free((caddr_t)new_open, M_NFSDSTATE); 2542 free((caddr_t)new_deleg, M_NFSDSTATE); 2543 if (haslock) { 2544 NFSLOCKV4ROOTMUTEX(); 2545 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2546 NFSUNLOCKV4ROOTMUTEX(); 2547 } 2548 error = NFSERR_EXPIRED; 2549 goto out; 2550 } 2551 2552 /* 2553 * Don't issue a Delegation, since one already exists and 2554 * delay delegation timeout, as required. 2555 */ 2556 delegate = 0; 2557 nfsrv_delaydelegtimeout(stp); 2558 } 2559 2560 /* 2561 * Check for access/deny bit conflicts. I also check for the 2562 * same owner, since the client might not have bothered to check. 2563 * Also, note an open for the same file and owner, if found, 2564 * which is all we do here for Delegate_Cur, since conflict 2565 * checking is already done. 2566 */ 2567 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2568 if (ownerstp && stp->ls_openowner == ownerstp) 2569 openstp = stp; 2570 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2571 /* 2572 * If another client has the file open, the only 2573 * delegation that can be issued is a Read delegation 2574 * and only if it is a Read open with Deny none. 2575 */ 2576 if (clp != stp->ls_clp) { 2577 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2578 NFSLCK_READACCESS) 2579 writedeleg = 0; 2580 else 2581 delegate = 0; 2582 } 2583 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2584 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2585 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2586 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2587 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2588 if (ret == 1) { 2589 /* 2590 * nfsrv_clientconflict() unlocks state 2591 * when it returns non-zero. 2592 */ 2593 free((caddr_t)new_open, M_NFSDSTATE); 2594 free((caddr_t)new_deleg, M_NFSDSTATE); 2595 openstp = NULL; 2596 goto tryagain; 2597 } 2598 if (ret == 2) 2599 error = NFSERR_PERM; 2600 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2601 error = NFSERR_RECLAIMCONFLICT; 2602 else 2603 error = NFSERR_SHAREDENIED; 2604 if (ret == 0) 2605 NFSUNLOCKSTATE(); 2606 if (haslock) { 2607 NFSLOCKV4ROOTMUTEX(); 2608 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2609 NFSUNLOCKV4ROOTMUTEX(); 2610 } 2611 free((caddr_t)new_open, M_NFSDSTATE); 2612 free((caddr_t)new_deleg, M_NFSDSTATE); 2613 printf("nfsd openctrl unexpected client cnfl\n"); 2614 goto out; 2615 } 2616 } 2617 } 2618 2619 /* 2620 * Check for a conflicting delegation. If one is found, call 2621 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2622 * been set yet, it will get the lock. Otherwise, it will recall 2623 * the delegation. Then, we try try again... 2624 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2625 * isn't a conflict.) 2626 * I currently believe the conflict algorithm to be: 2627 * For Open with Read Access and Deny None 2628 * - there is a conflict iff a different client has a write delegation 2629 * For Open with other Write Access or any Deny except None 2630 * - there is a conflict if a different client has any delegation 2631 * - there is a conflict if the same client has a read delegation 2632 * (The current concensus is that this last case should be 2633 * considered a conflict since the client with a read delegation 2634 * could have done an Open with ReadAccess and WriteDeny 2635 * locally and then not have checked for the WriteDeny.) 2636 */ 2637 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2638 stp = LIST_FIRST(&lfp->lf_deleg); 2639 while (stp != LIST_END(&lfp->lf_deleg)) { 2640 nstp = LIST_NEXT(stp, ls_file); 2641 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2642 writedeleg = 0; 2643 else 2644 delegate = 0; 2645 if ((readonly && stp->ls_clp != clp && 2646 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2647 (!readonly && (stp->ls_clp != clp || 2648 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2649 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2650 delegate = 2; 2651 } else { 2652 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2653 if (ret) { 2654 /* 2655 * nfsrv_delegconflict() unlocks state 2656 * when it returns non-zero. 2657 */ 2658 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2659 free((caddr_t)new_open, M_NFSDSTATE); 2660 free((caddr_t)new_deleg, M_NFSDSTATE); 2661 if (ret == -1) { 2662 openstp = NULL; 2663 goto tryagain; 2664 } 2665 error = ret; 2666 goto out; 2667 } 2668 } 2669 } 2670 stp = nstp; 2671 } 2672 } 2673 2674 /* 2675 * We only get here if there was no open that conflicted. 2676 * If an open for the owner exists, or in the access/deny bits. 2677 * Otherwise it is a new open. If the open_owner hasn't been 2678 * confirmed, replace the open with the new one needing confirmation, 2679 * otherwise add the open. 2680 */ 2681 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2682 /* 2683 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2684 * a match. If found, just move the old delegation to the current 2685 * delegation list and issue open. If not found, return 2686 * NFSERR_EXPIRED. 2687 */ 2688 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2689 if (stp->ls_lfp == lfp) { 2690 /* Found it */ 2691 if (stp->ls_clp != clp) 2692 panic("olddeleg clp"); 2693 LIST_REMOVE(stp, ls_list); 2694 LIST_REMOVE(stp, ls_hash); 2695 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2696 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 2697 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2698 clp->lc_clientid.lval[0]; 2699 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2700 clp->lc_clientid.lval[1]; 2701 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2702 nfsrv_nextstateindex(clp); 2703 stp->ls_compref = nd->nd_compref; 2704 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2705 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2706 stp->ls_stateid), stp, ls_hash); 2707 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2708 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2709 else 2710 *rflagsp |= NFSV4OPEN_READDELEGATE; 2711 clp->lc_delegtime = NFSD_MONOSEC + 2712 nfsrv_lease + NFSRV_LEASEDELTA; 2713 2714 /* 2715 * Now, do the associated open. 2716 */ 2717 new_open->ls_stateid.seqid = 1; 2718 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2719 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2720 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2721 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2722 NFSLCK_OPEN; 2723 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2724 new_open->ls_flags |= (NFSLCK_READACCESS | 2725 NFSLCK_WRITEACCESS); 2726 else 2727 new_open->ls_flags |= NFSLCK_READACCESS; 2728 new_open->ls_uid = new_stp->ls_uid; 2729 new_open->ls_lfp = lfp; 2730 new_open->ls_clp = clp; 2731 LIST_INIT(&new_open->ls_open); 2732 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2733 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2734 new_open, ls_hash); 2735 /* 2736 * and handle the open owner 2737 */ 2738 if (ownerstp) { 2739 new_open->ls_openowner = ownerstp; 2740 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 2741 } else { 2742 new_open->ls_openowner = new_stp; 2743 new_stp->ls_flags = 0; 2744 nfsrvd_refcache(new_stp->ls_op); 2745 new_stp->ls_noopens = 0; 2746 LIST_INIT(&new_stp->ls_open); 2747 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2748 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2749 *new_stpp = NULL; 2750 newnfsstats.srvopenowners++; 2751 nfsrv_openpluslock++; 2752 } 2753 openstp = new_open; 2754 new_open = NULL; 2755 newnfsstats.srvopens++; 2756 nfsrv_openpluslock++; 2757 break; 2758 } 2759 } 2760 if (stp == LIST_END(&clp->lc_olddeleg)) 2761 error = NFSERR_EXPIRED; 2762 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2763 /* 2764 * Scan to see that no delegation for this client and file 2765 * doesn't already exist. 2766 * There also shouldn't yet be an Open for this file and 2767 * openowner. 2768 */ 2769 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2770 if (stp->ls_clp == clp) 2771 break; 2772 } 2773 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 2774 /* 2775 * This is the Claim_Previous case with a delegation 2776 * type != Delegate_None. 2777 */ 2778 /* 2779 * First, add the delegation. (Although we must issue the 2780 * delegation, we can also ask for an immediate return.) 2781 */ 2782 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 2783 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 2784 clp->lc_clientid.lval[0]; 2785 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 2786 clp->lc_clientid.lval[1]; 2787 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 2788 nfsrv_nextstateindex(clp); 2789 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 2790 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2791 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2792 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2793 } else { 2794 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2795 NFSLCK_READACCESS); 2796 *rflagsp |= NFSV4OPEN_READDELEGATE; 2797 } 2798 new_deleg->ls_uid = new_stp->ls_uid; 2799 new_deleg->ls_lfp = lfp; 2800 new_deleg->ls_clp = clp; 2801 new_deleg->ls_filerev = filerev; 2802 new_deleg->ls_compref = nd->nd_compref; 2803 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2804 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2805 new_deleg->ls_stateid), new_deleg, ls_hash); 2806 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2807 new_deleg = NULL; 2808 if (delegate == 2 || nfsrv_issuedelegs == 0 || 2809 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 2810 LCL_CALLBACKSON || 2811 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 2812 !NFSVNO_DELEGOK(vp)) 2813 *rflagsp |= NFSV4OPEN_RECALL; 2814 newnfsstats.srvdelegates++; 2815 nfsrv_openpluslock++; 2816 nfsrv_delegatecnt++; 2817 2818 /* 2819 * Now, do the associated open. 2820 */ 2821 new_open->ls_stateid.seqid = 1; 2822 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2823 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2824 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2825 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 2826 NFSLCK_OPEN; 2827 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 2828 new_open->ls_flags |= (NFSLCK_READACCESS | 2829 NFSLCK_WRITEACCESS); 2830 else 2831 new_open->ls_flags |= NFSLCK_READACCESS; 2832 new_open->ls_uid = new_stp->ls_uid; 2833 new_open->ls_lfp = lfp; 2834 new_open->ls_clp = clp; 2835 LIST_INIT(&new_open->ls_open); 2836 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2837 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2838 new_open, ls_hash); 2839 /* 2840 * and handle the open owner 2841 */ 2842 if (ownerstp) { 2843 new_open->ls_openowner = ownerstp; 2844 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2845 } else { 2846 new_open->ls_openowner = new_stp; 2847 new_stp->ls_flags = 0; 2848 nfsrvd_refcache(new_stp->ls_op); 2849 new_stp->ls_noopens = 0; 2850 LIST_INIT(&new_stp->ls_open); 2851 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2852 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2853 *new_stpp = NULL; 2854 newnfsstats.srvopenowners++; 2855 nfsrv_openpluslock++; 2856 } 2857 openstp = new_open; 2858 new_open = NULL; 2859 newnfsstats.srvopens++; 2860 nfsrv_openpluslock++; 2861 } else { 2862 error = NFSERR_RECLAIMCONFLICT; 2863 } 2864 } else if (ownerstp) { 2865 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 2866 /* Replace the open */ 2867 if (ownerstp->ls_op) 2868 nfsrvd_derefcache(ownerstp->ls_op); 2869 ownerstp->ls_op = new_stp->ls_op; 2870 nfsrvd_refcache(ownerstp->ls_op); 2871 ownerstp->ls_seq = new_stp->ls_seq; 2872 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 2873 stp = LIST_FIRST(&ownerstp->ls_open); 2874 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 2875 NFSLCK_OPEN; 2876 stp->ls_stateid.seqid = 1; 2877 stp->ls_uid = new_stp->ls_uid; 2878 if (lfp != stp->ls_lfp) { 2879 LIST_REMOVE(stp, ls_file); 2880 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 2881 stp->ls_lfp = lfp; 2882 } 2883 openstp = stp; 2884 } else if (openstp) { 2885 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 2886 openstp->ls_stateid.seqid++; 2887 if ((nd->nd_flag & ND_NFSV41) != 0 && 2888 openstp->ls_stateid.seqid == 0) 2889 openstp->ls_stateid.seqid = 1; 2890 2891 /* 2892 * This is where we can choose to issue a delegation. 2893 */ 2894 if (delegate == 0 || writedeleg == 0 || 2895 NFSVNO_EXRDONLY(exp) || (readonly != 0 && 2896 nfsrv_writedelegifpos == 0) || 2897 !NFSVNO_DELEGOK(vp) || 2898 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 || 2899 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 2900 LCL_CALLBACKSON) 2901 *rflagsp |= NFSV4OPEN_WDCONTENTION; 2902 else if (nfsrv_issuedelegs == 0 || 2903 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 2904 *rflagsp |= NFSV4OPEN_WDRESOURCE; 2905 else if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 2906 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 2907 else { 2908 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 2909 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 2910 = clp->lc_clientid.lval[0]; 2911 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 2912 = clp->lc_clientid.lval[1]; 2913 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 2914 = nfsrv_nextstateindex(clp); 2915 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2916 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2917 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2918 new_deleg->ls_uid = new_stp->ls_uid; 2919 new_deleg->ls_lfp = lfp; 2920 new_deleg->ls_clp = clp; 2921 new_deleg->ls_filerev = filerev; 2922 new_deleg->ls_compref = nd->nd_compref; 2923 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2924 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2925 new_deleg->ls_stateid), new_deleg, ls_hash); 2926 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2927 new_deleg = NULL; 2928 newnfsstats.srvdelegates++; 2929 nfsrv_openpluslock++; 2930 nfsrv_delegatecnt++; 2931 } 2932 } else { 2933 new_open->ls_stateid.seqid = 1; 2934 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2935 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2936 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2937 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 2938 NFSLCK_OPEN; 2939 new_open->ls_uid = new_stp->ls_uid; 2940 new_open->ls_openowner = ownerstp; 2941 new_open->ls_lfp = lfp; 2942 new_open->ls_clp = clp; 2943 LIST_INIT(&new_open->ls_open); 2944 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2945 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2946 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2947 new_open, ls_hash); 2948 openstp = new_open; 2949 new_open = NULL; 2950 newnfsstats.srvopens++; 2951 nfsrv_openpluslock++; 2952 2953 /* 2954 * This is where we can choose to issue a delegation. 2955 */ 2956 if (delegate == 0 || (writedeleg == 0 && readonly == 0) || 2957 !NFSVNO_DELEGOK(vp) || 2958 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 2959 LCL_CALLBACKSON) 2960 *rflagsp |= NFSV4OPEN_WDCONTENTION; 2961 else if (nfsrv_issuedelegs == 0 || 2962 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 2963 *rflagsp |= NFSV4OPEN_WDRESOURCE; 2964 else if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 2965 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 2966 else { 2967 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 2968 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 2969 = clp->lc_clientid.lval[0]; 2970 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 2971 = clp->lc_clientid.lval[1]; 2972 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 2973 = nfsrv_nextstateindex(clp); 2974 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 2975 (nfsrv_writedelegifpos || !readonly) && 2976 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) { 2977 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2978 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2979 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2980 } else { 2981 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2982 NFSLCK_READACCESS); 2983 *rflagsp |= NFSV4OPEN_READDELEGATE; 2984 } 2985 new_deleg->ls_uid = new_stp->ls_uid; 2986 new_deleg->ls_lfp = lfp; 2987 new_deleg->ls_clp = clp; 2988 new_deleg->ls_filerev = filerev; 2989 new_deleg->ls_compref = nd->nd_compref; 2990 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2991 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2992 new_deleg->ls_stateid), new_deleg, ls_hash); 2993 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2994 new_deleg = NULL; 2995 newnfsstats.srvdelegates++; 2996 nfsrv_openpluslock++; 2997 nfsrv_delegatecnt++; 2998 } 2999 } 3000 } else { 3001 /* 3002 * New owner case. Start the open_owner sequence with a 3003 * Needs confirmation (unless a reclaim) and hang the 3004 * new open off it. 3005 */ 3006 new_open->ls_stateid.seqid = 1; 3007 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3008 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3009 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3010 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3011 NFSLCK_OPEN; 3012 new_open->ls_uid = new_stp->ls_uid; 3013 LIST_INIT(&new_open->ls_open); 3014 new_open->ls_openowner = new_stp; 3015 new_open->ls_lfp = lfp; 3016 new_open->ls_clp = clp; 3017 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3018 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3019 new_stp->ls_flags = 0; 3020 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3021 /* NFSv4.1 never needs confirmation. */ 3022 new_stp->ls_flags = 0; 3023 3024 /* 3025 * This is where we can choose to issue a delegation. 3026 */ 3027 if (delegate && nfsrv_issuedelegs && 3028 (writedeleg || readonly) && 3029 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 3030 LCL_CALLBACKSON && 3031 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 3032 NFSVNO_DELEGOK(vp) && 3033 ((nd->nd_flag & ND_NFSV41) == 0 || 3034 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) { 3035 new_deleg->ls_stateid.seqid = 3036 delegstateidp->seqid = 1; 3037 new_deleg->ls_stateid.other[0] = 3038 delegstateidp->other[0] 3039 = clp->lc_clientid.lval[0]; 3040 new_deleg->ls_stateid.other[1] = 3041 delegstateidp->other[1] 3042 = clp->lc_clientid.lval[1]; 3043 new_deleg->ls_stateid.other[2] = 3044 delegstateidp->other[2] 3045 = nfsrv_nextstateindex(clp); 3046 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3047 (nfsrv_writedelegifpos || !readonly) && 3048 ((nd->nd_flag & ND_NFSV41) == 0 || 3049 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 3050 0)) { 3051 new_deleg->ls_flags = 3052 (NFSLCK_DELEGWRITE | 3053 NFSLCK_READACCESS | 3054 NFSLCK_WRITEACCESS); 3055 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3056 } else { 3057 new_deleg->ls_flags = 3058 (NFSLCK_DELEGREAD | 3059 NFSLCK_READACCESS); 3060 *rflagsp |= NFSV4OPEN_READDELEGATE; 3061 } 3062 new_deleg->ls_uid = new_stp->ls_uid; 3063 new_deleg->ls_lfp = lfp; 3064 new_deleg->ls_clp = clp; 3065 new_deleg->ls_filerev = filerev; 3066 new_deleg->ls_compref = nd->nd_compref; 3067 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, 3068 ls_file); 3069 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3070 new_deleg->ls_stateid), new_deleg, ls_hash); 3071 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, 3072 ls_list); 3073 new_deleg = NULL; 3074 newnfsstats.srvdelegates++; 3075 nfsrv_openpluslock++; 3076 nfsrv_delegatecnt++; 3077 } 3078 } else { 3079 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3080 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3081 } 3082 nfsrvd_refcache(new_stp->ls_op); 3083 new_stp->ls_noopens = 0; 3084 LIST_INIT(&new_stp->ls_open); 3085 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3086 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3087 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3088 new_open, ls_hash); 3089 openstp = new_open; 3090 new_open = NULL; 3091 *new_stpp = NULL; 3092 newnfsstats.srvopens++; 3093 nfsrv_openpluslock++; 3094 newnfsstats.srvopenowners++; 3095 nfsrv_openpluslock++; 3096 } 3097 if (!error) { 3098 stateidp->seqid = openstp->ls_stateid.seqid; 3099 stateidp->other[0] = openstp->ls_stateid.other[0]; 3100 stateidp->other[1] = openstp->ls_stateid.other[1]; 3101 stateidp->other[2] = openstp->ls_stateid.other[2]; 3102 } 3103 NFSUNLOCKSTATE(); 3104 if (haslock) { 3105 NFSLOCKV4ROOTMUTEX(); 3106 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3107 NFSUNLOCKV4ROOTMUTEX(); 3108 } 3109 if (new_open) 3110 FREE((caddr_t)new_open, M_NFSDSTATE); 3111 if (new_deleg) 3112 FREE((caddr_t)new_deleg, M_NFSDSTATE); 3113 3114out: 3115 NFSEXITCODE2(error, nd); 3116 return (error); 3117} 3118 3119/* 3120 * Open update. Does the confirm, downgrade and close. 3121 */ 3122APPLESTATIC int 3123nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3124 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p) 3125{ 3126 struct nfsstate *stp, *ownerstp; 3127 struct nfsclient *clp; 3128 struct nfslockfile *lfp; 3129 u_int32_t bits; 3130 int error = 0, gotstate = 0, len = 0; 3131 u_char client[NFSV4_OPAQUELIMIT]; 3132 3133 /* 3134 * Check for restart conditions (client and server). 3135 */ 3136 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3137 &new_stp->ls_stateid, 0); 3138 if (error) 3139 goto out; 3140 3141 NFSLOCKSTATE(); 3142 /* 3143 * Get the open structure via clientid and stateid. 3144 */ 3145 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3146 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3147 if (!error) 3148 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3149 new_stp->ls_flags, &stp); 3150 3151 /* 3152 * Sanity check the open. 3153 */ 3154 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3155 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3156 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3157 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3158 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3159 error = NFSERR_BADSTATEID; 3160 3161 if (!error) 3162 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3163 stp->ls_openowner, new_stp->ls_op); 3164 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3165 (((nd->nd_flag & ND_NFSV41) == 0 && 3166 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3167 ((nd->nd_flag & ND_NFSV41) != 0 && 3168 new_stp->ls_stateid.seqid != 0))) 3169 error = NFSERR_OLDSTATEID; 3170 if (!error && vnode_vtype(vp) != VREG) { 3171 if (vnode_vtype(vp) == VDIR) 3172 error = NFSERR_ISDIR; 3173 else 3174 error = NFSERR_INVAL; 3175 } 3176 3177 if (error) { 3178 /* 3179 * If a client tries to confirm an Open with a bad 3180 * seqid# and there are no byte range locks or other Opens 3181 * on the openowner, just throw it away, so the next use of the 3182 * openowner will start a fresh seq#. 3183 */ 3184 if (error == NFSERR_BADSEQID && 3185 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3186 nfsrv_nootherstate(stp)) 3187 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3188 NFSUNLOCKSTATE(); 3189 goto out; 3190 } 3191 3192 /* 3193 * Set the return stateid. 3194 */ 3195 stateidp->seqid = stp->ls_stateid.seqid + 1; 3196 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3197 stateidp->seqid = 1; 3198 stateidp->other[0] = stp->ls_stateid.other[0]; 3199 stateidp->other[1] = stp->ls_stateid.other[1]; 3200 stateidp->other[2] = stp->ls_stateid.other[2]; 3201 /* 3202 * Now, handle the three cases. 3203 */ 3204 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3205 /* 3206 * If the open doesn't need confirmation, it seems to me that 3207 * there is a client error, but I'll just log it and keep going? 3208 */ 3209 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3210 printf("Nfsv4d: stray open confirm\n"); 3211 stp->ls_openowner->ls_flags = 0; 3212 stp->ls_stateid.seqid++; 3213 if ((nd->nd_flag & ND_NFSV41) != 0 && 3214 stp->ls_stateid.seqid == 0) 3215 stp->ls_stateid.seqid = 1; 3216 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3217 clp->lc_flags |= LCL_STAMPEDSTABLE; 3218 len = clp->lc_idlen; 3219 NFSBCOPY(clp->lc_id, client, len); 3220 gotstate = 1; 3221 } 3222 NFSUNLOCKSTATE(); 3223 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3224 ownerstp = stp->ls_openowner; 3225 lfp = stp->ls_lfp; 3226 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3227 /* Get the lf lock */ 3228 nfsrv_locklf(lfp); 3229 NFSUNLOCKSTATE(); 3230 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3231 NFSLOCKSTATE(); 3232 nfsrv_unlocklf(lfp); 3233 NFSUNLOCKSTATE(); 3234 } 3235 } else { 3236 (void) nfsrv_freeopen(stp, NULL, 0, p); 3237 NFSUNLOCKSTATE(); 3238 } 3239 } else { 3240 /* 3241 * Update the share bits, making sure that the new set are a 3242 * subset of the old ones. 3243 */ 3244 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3245 if (~(stp->ls_flags) & bits) { 3246 NFSUNLOCKSTATE(); 3247 error = NFSERR_INVAL; 3248 goto out; 3249 } 3250 stp->ls_flags = (bits | NFSLCK_OPEN); 3251 stp->ls_stateid.seqid++; 3252 if ((nd->nd_flag & ND_NFSV41) != 0 && 3253 stp->ls_stateid.seqid == 0) 3254 stp->ls_stateid.seqid = 1; 3255 NFSUNLOCKSTATE(); 3256 } 3257 3258 /* 3259 * If the client just confirmed its first open, write a timestamp 3260 * to the stable storage file. 3261 */ 3262 if (gotstate != 0) { 3263 nfsrv_writestable(client, len, NFSNST_NEWSTATE, p); 3264 nfsrv_backupstable(); 3265 } 3266 3267out: 3268 NFSEXITCODE2(error, nd); 3269 return (error); 3270} 3271 3272/* 3273 * Delegation update. Does the purge and return. 3274 */ 3275APPLESTATIC int 3276nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3277 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3278 NFSPROC_T *p) 3279{ 3280 struct nfsstate *stp; 3281 struct nfsclient *clp; 3282 int error = 0; 3283 fhandle_t fh; 3284 3285 /* 3286 * Do a sanity check against the file handle for DelegReturn. 3287 */ 3288 if (vp) { 3289 error = nfsvno_getfh(vp, &fh, p); 3290 if (error) 3291 goto out; 3292 } 3293 /* 3294 * Check for restart conditions (client and server). 3295 */ 3296 if (op == NFSV4OP_DELEGRETURN) 3297 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3298 stateidp, 0); 3299 else 3300 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3301 stateidp, 0); 3302 3303 NFSLOCKSTATE(); 3304 /* 3305 * Get the open structure via clientid and stateid. 3306 */ 3307 if (!error) 3308 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3309 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3310 if (error) { 3311 if (error == NFSERR_CBPATHDOWN) 3312 error = 0; 3313 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3314 error = NFSERR_STALESTATEID; 3315 } 3316 if (!error && op == NFSV4OP_DELEGRETURN) { 3317 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3318 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3319 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3320 error = NFSERR_OLDSTATEID; 3321 } 3322 /* 3323 * NFSERR_EXPIRED means that the state has gone away, 3324 * so Delegations have been purged. Just return ok. 3325 */ 3326 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3327 NFSUNLOCKSTATE(); 3328 error = 0; 3329 goto out; 3330 } 3331 if (error) { 3332 NFSUNLOCKSTATE(); 3333 goto out; 3334 } 3335 3336 if (op == NFSV4OP_DELEGRETURN) { 3337 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3338 sizeof (fhandle_t))) { 3339 NFSUNLOCKSTATE(); 3340 error = NFSERR_BADSTATEID; 3341 goto out; 3342 } 3343 nfsrv_freedeleg(stp); 3344 } else { 3345 nfsrv_freedeleglist(&clp->lc_olddeleg); 3346 } 3347 NFSUNLOCKSTATE(); 3348 error = 0; 3349 3350out: 3351 NFSEXITCODE(error); 3352 return (error); 3353} 3354 3355/* 3356 * Release lock owner. 3357 */ 3358APPLESTATIC int 3359nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3360 NFSPROC_T *p) 3361{ 3362 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3363 struct nfsclient *clp; 3364 int error = 0; 3365 3366 /* 3367 * Check for restart conditions (client and server). 3368 */ 3369 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3370 &new_stp->ls_stateid, 0); 3371 if (error) 3372 goto out; 3373 3374 NFSLOCKSTATE(); 3375 /* 3376 * Get the lock owner by name. 3377 */ 3378 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3379 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3380 if (error) { 3381 NFSUNLOCKSTATE(); 3382 goto out; 3383 } 3384 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3385 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3386 stp = LIST_FIRST(&openstp->ls_open); 3387 while (stp != LIST_END(&openstp->ls_open)) { 3388 nstp = LIST_NEXT(stp, ls_list); 3389 /* 3390 * If the owner matches, check for locks and 3391 * then free or return an error. 3392 */ 3393 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3394 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3395 stp->ls_ownerlen)){ 3396 if (LIST_EMPTY(&stp->ls_lock)) { 3397 nfsrv_freelockowner(stp, NULL, 0, p); 3398 } else { 3399 NFSUNLOCKSTATE(); 3400 error = NFSERR_LOCKSHELD; 3401 goto out; 3402 } 3403 } 3404 stp = nstp; 3405 } 3406 } 3407 } 3408 NFSUNLOCKSTATE(); 3409 3410out: 3411 NFSEXITCODE(error); 3412 return (error); 3413} 3414 3415/* 3416 * Get the file handle for a lock structure. 3417 */ 3418static int 3419nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3420 fhandle_t *nfhp, NFSPROC_T *p) 3421{ 3422 fhandle_t *fhp = NULL; 3423 int error; 3424 3425 /* 3426 * For lock, use the new nfslock structure, otherwise just 3427 * a fhandle_t on the stack. 3428 */ 3429 if (flags & NFSLCK_OPEN) { 3430 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3431 fhp = &new_lfp->lf_fh; 3432 } else if (nfhp) { 3433 fhp = nfhp; 3434 } else { 3435 panic("nfsrv_getlockfh"); 3436 } 3437 error = nfsvno_getfh(vp, fhp, p); 3438 NFSEXITCODE(error); 3439 return (error); 3440} 3441 3442/* 3443 * Get an nfs lock structure. Allocate one, as required, and return a 3444 * pointer to it. 3445 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3446 */ 3447static int 3448nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3449 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3450{ 3451 struct nfslockfile *lfp; 3452 fhandle_t *fhp = NULL, *tfhp; 3453 struct nfslockhashhead *hp; 3454 struct nfslockfile *new_lfp = NULL; 3455 3456 /* 3457 * For lock, use the new nfslock structure, otherwise just 3458 * a fhandle_t on the stack. 3459 */ 3460 if (flags & NFSLCK_OPEN) { 3461 new_lfp = *new_lfpp; 3462 fhp = &new_lfp->lf_fh; 3463 } else if (nfhp) { 3464 fhp = nfhp; 3465 } else { 3466 panic("nfsrv_getlockfile"); 3467 } 3468 3469 hp = NFSLOCKHASH(fhp); 3470 LIST_FOREACH(lfp, hp, lf_hash) { 3471 tfhp = &lfp->lf_fh; 3472 if (NFSVNO_CMPFH(fhp, tfhp)) { 3473 if (lockit) 3474 nfsrv_locklf(lfp); 3475 *lfpp = lfp; 3476 return (0); 3477 } 3478 } 3479 if (!(flags & NFSLCK_OPEN)) 3480 return (-1); 3481 3482 /* 3483 * No match, so chain the new one into the list. 3484 */ 3485 LIST_INIT(&new_lfp->lf_open); 3486 LIST_INIT(&new_lfp->lf_lock); 3487 LIST_INIT(&new_lfp->lf_deleg); 3488 LIST_INIT(&new_lfp->lf_locallock); 3489 LIST_INIT(&new_lfp->lf_rollback); 3490 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3491 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3492 new_lfp->lf_usecount = 0; 3493 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3494 *lfpp = new_lfp; 3495 *new_lfpp = NULL; 3496 return (0); 3497} 3498 3499/* 3500 * This function adds a nfslock lock structure to the list for the associated 3501 * nfsstate and nfslockfile structures. It will be inserted after the 3502 * entry pointed at by insert_lop. 3503 */ 3504static void 3505nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3506 struct nfsstate *stp, struct nfslockfile *lfp) 3507{ 3508 struct nfslock *lop, *nlop; 3509 3510 new_lop->lo_stp = stp; 3511 new_lop->lo_lfp = lfp; 3512 3513 if (stp != NULL) { 3514 /* Insert in increasing lo_first order */ 3515 lop = LIST_FIRST(&lfp->lf_lock); 3516 if (lop == LIST_END(&lfp->lf_lock) || 3517 new_lop->lo_first <= lop->lo_first) { 3518 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3519 } else { 3520 nlop = LIST_NEXT(lop, lo_lckfile); 3521 while (nlop != LIST_END(&lfp->lf_lock) && 3522 nlop->lo_first < new_lop->lo_first) { 3523 lop = nlop; 3524 nlop = LIST_NEXT(lop, lo_lckfile); 3525 } 3526 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3527 } 3528 } else { 3529 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3530 } 3531 3532 /* 3533 * Insert after insert_lop, which is overloaded as stp or lfp for 3534 * an empty list. 3535 */ 3536 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3537 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3538 else if ((struct nfsstate *)insert_lop == stp) 3539 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3540 else 3541 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3542 if (stp != NULL) { 3543 newnfsstats.srvlocks++; 3544 nfsrv_openpluslock++; 3545 } 3546} 3547 3548/* 3549 * This function updates the locking for a lock owner and given file. It 3550 * maintains a list of lock ranges ordered on increasing file offset that 3551 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3552 * It always adds new_lop to the list and sometimes uses the one pointed 3553 * at by other_lopp. 3554 */ 3555static void 3556nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3557 struct nfslock **other_lopp, struct nfslockfile *lfp) 3558{ 3559 struct nfslock *new_lop = *new_lopp; 3560 struct nfslock *lop, *tlop, *ilop; 3561 struct nfslock *other_lop = *other_lopp; 3562 int unlock = 0, myfile = 0; 3563 u_int64_t tmp; 3564 3565 /* 3566 * Work down the list until the lock is merged. 3567 */ 3568 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3569 unlock = 1; 3570 if (stp != NULL) { 3571 ilop = (struct nfslock *)stp; 3572 lop = LIST_FIRST(&stp->ls_lock); 3573 } else { 3574 ilop = (struct nfslock *)lfp; 3575 lop = LIST_FIRST(&lfp->lf_locallock); 3576 } 3577 while (lop != NULL) { 3578 /* 3579 * Only check locks for this file that aren't before the start of 3580 * new lock's range. 3581 */ 3582 if (lop->lo_lfp == lfp) { 3583 myfile = 1; 3584 if (lop->lo_end >= new_lop->lo_first) { 3585 if (new_lop->lo_end < lop->lo_first) { 3586 /* 3587 * If the new lock ends before the start of the 3588 * current lock's range, no merge, just insert 3589 * the new lock. 3590 */ 3591 break; 3592 } 3593 if (new_lop->lo_flags == lop->lo_flags || 3594 (new_lop->lo_first <= lop->lo_first && 3595 new_lop->lo_end >= lop->lo_end)) { 3596 /* 3597 * This lock can be absorbed by the new lock/unlock. 3598 * This happens when it covers the entire range 3599 * of the old lock or is contiguous 3600 * with the old lock and is of the same type or an 3601 * unlock. 3602 */ 3603 if (lop->lo_first < new_lop->lo_first) 3604 new_lop->lo_first = lop->lo_first; 3605 if (lop->lo_end > new_lop->lo_end) 3606 new_lop->lo_end = lop->lo_end; 3607 tlop = lop; 3608 lop = LIST_NEXT(lop, lo_lckowner); 3609 nfsrv_freenfslock(tlop); 3610 continue; 3611 } 3612 3613 /* 3614 * All these cases are for contiguous locks that are not the 3615 * same type, so they can't be merged. 3616 */ 3617 if (new_lop->lo_first <= lop->lo_first) { 3618 /* 3619 * This case is where the new lock overlaps with the 3620 * first part of the old lock. Move the start of the 3621 * old lock to just past the end of the new lock. The 3622 * new lock will be inserted in front of the old, since 3623 * ilop hasn't been updated. (We are done now.) 3624 */ 3625 lop->lo_first = new_lop->lo_end; 3626 break; 3627 } 3628 if (new_lop->lo_end >= lop->lo_end) { 3629 /* 3630 * This case is where the new lock overlaps with the 3631 * end of the old lock's range. Move the old lock's 3632 * end to just before the new lock's first and insert 3633 * the new lock after the old lock. 3634 * Might not be done yet, since the new lock could 3635 * overlap further locks with higher ranges. 3636 */ 3637 lop->lo_end = new_lop->lo_first; 3638 ilop = lop; 3639 lop = LIST_NEXT(lop, lo_lckowner); 3640 continue; 3641 } 3642 /* 3643 * The final case is where the new lock's range is in the 3644 * middle of the current lock's and splits the current lock 3645 * up. Use *other_lopp to handle the second part of the 3646 * split old lock range. (We are done now.) 3647 * For unlock, we use new_lop as other_lop and tmp, since 3648 * other_lop and new_lop are the same for this case. 3649 * We noted the unlock case above, so we don't need 3650 * new_lop->lo_flags any longer. 3651 */ 3652 tmp = new_lop->lo_first; 3653 if (other_lop == NULL) { 3654 if (!unlock) 3655 panic("nfsd srv update unlock"); 3656 other_lop = new_lop; 3657 *new_lopp = NULL; 3658 } 3659 other_lop->lo_first = new_lop->lo_end; 3660 other_lop->lo_end = lop->lo_end; 3661 other_lop->lo_flags = lop->lo_flags; 3662 other_lop->lo_stp = stp; 3663 other_lop->lo_lfp = lfp; 3664 lop->lo_end = tmp; 3665 nfsrv_insertlock(other_lop, lop, stp, lfp); 3666 *other_lopp = NULL; 3667 ilop = lop; 3668 break; 3669 } 3670 } 3671 ilop = lop; 3672 lop = LIST_NEXT(lop, lo_lckowner); 3673 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3674 break; 3675 } 3676 3677 /* 3678 * Insert the new lock in the list at the appropriate place. 3679 */ 3680 if (!unlock) { 3681 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3682 *new_lopp = NULL; 3683 } 3684} 3685 3686/* 3687 * This function handles sequencing of locks, etc. 3688 * It returns an error that indicates what the caller should do. 3689 */ 3690static int 3691nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3692 struct nfsstate *stp, struct nfsrvcache *op) 3693{ 3694 int error = 0; 3695 3696 if ((nd->nd_flag & ND_NFSV41) != 0) 3697 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 3698 goto out; 3699 if (op != nd->nd_rp) 3700 panic("nfsrvstate checkseqid"); 3701 if (!(op->rc_flag & RC_INPROG)) 3702 panic("nfsrvstate not inprog"); 3703 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3704 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3705 panic("nfsrvstate op refcnt"); 3706 } 3707 if ((stp->ls_seq + 1) == seqid) { 3708 if (stp->ls_op) 3709 nfsrvd_derefcache(stp->ls_op); 3710 stp->ls_op = op; 3711 nfsrvd_refcache(op); 3712 stp->ls_seq = seqid; 3713 goto out; 3714 } else if (stp->ls_seq == seqid && stp->ls_op && 3715 op->rc_xid == stp->ls_op->rc_xid && 3716 op->rc_refcnt == 0 && 3717 op->rc_reqlen == stp->ls_op->rc_reqlen && 3718 op->rc_cksum == stp->ls_op->rc_cksum) { 3719 if (stp->ls_op->rc_flag & RC_INPROG) { 3720 error = NFSERR_DONTREPLY; 3721 goto out; 3722 } 3723 nd->nd_rp = stp->ls_op; 3724 nd->nd_rp->rc_flag |= RC_INPROG; 3725 nfsrvd_delcache(op); 3726 error = NFSERR_REPLYFROMCACHE; 3727 goto out; 3728 } 3729 error = NFSERR_BADSEQID; 3730 3731out: 3732 NFSEXITCODE2(error, nd); 3733 return (error); 3734} 3735 3736/* 3737 * Get the client ip address for callbacks. If the strings can't be parsed, 3738 * just set lc_program to 0 to indicate no callbacks are possible. 3739 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3740 * the address to the client's transport address. This won't be used 3741 * for callbacks, but can be printed out by newnfsstats for info.) 3742 * Return error if the xdr can't be parsed, 0 otherwise. 3743 */ 3744APPLESTATIC int 3745nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3746{ 3747 u_int32_t *tl; 3748 u_char *cp, *cp2; 3749 int i, j; 3750 struct sockaddr_in *rad, *sad; 3751 u_char protocol[5], addr[24]; 3752 int error = 0, cantparse = 0; 3753 union { 3754 u_long ival; 3755 u_char cval[4]; 3756 } ip; 3757 union { 3758 u_short sval; 3759 u_char cval[2]; 3760 } port; 3761 3762 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 3763 rad->sin_family = AF_INET; 3764 rad->sin_len = sizeof (struct sockaddr_in); 3765 rad->sin_addr.s_addr = 0; 3766 rad->sin_port = 0; 3767 clp->lc_req.nr_client = NULL; 3768 clp->lc_req.nr_lock = 0; 3769 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3770 i = fxdr_unsigned(int, *tl); 3771 if (i >= 3 && i <= 4) { 3772 error = nfsrv_mtostr(nd, protocol, i); 3773 if (error) 3774 goto nfsmout; 3775 if (!strcmp(protocol, "tcp")) { 3776 clp->lc_flags |= LCL_TCPCALLBACK; 3777 clp->lc_req.nr_sotype = SOCK_STREAM; 3778 clp->lc_req.nr_soproto = IPPROTO_TCP; 3779 } else if (!strcmp(protocol, "udp")) { 3780 clp->lc_req.nr_sotype = SOCK_DGRAM; 3781 clp->lc_req.nr_soproto = IPPROTO_UDP; 3782 } else { 3783 cantparse = 1; 3784 } 3785 } else { 3786 cantparse = 1; 3787 if (i > 0) { 3788 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3789 if (error) 3790 goto nfsmout; 3791 } 3792 } 3793 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3794 i = fxdr_unsigned(int, *tl); 3795 if (i < 0) { 3796 error = NFSERR_BADXDR; 3797 goto nfsmout; 3798 } else if (i == 0) { 3799 cantparse = 1; 3800 } else if (!cantparse && i <= 23 && i >= 11) { 3801 error = nfsrv_mtostr(nd, addr, i); 3802 if (error) 3803 goto nfsmout; 3804 3805 /* 3806 * Parse out the address fields. We expect 6 decimal numbers 3807 * separated by '.'s. 3808 */ 3809 cp = addr; 3810 i = 0; 3811 while (*cp && i < 6) { 3812 cp2 = cp; 3813 while (*cp2 && *cp2 != '.') 3814 cp2++; 3815 if (*cp2) 3816 *cp2++ = '\0'; 3817 else if (i != 5) { 3818 cantparse = 1; 3819 break; 3820 } 3821 j = nfsrv_getipnumber(cp); 3822 if (j >= 0) { 3823 if (i < 4) 3824 ip.cval[3 - i] = j; 3825 else 3826 port.cval[5 - i] = j; 3827 } else { 3828 cantparse = 1; 3829 break; 3830 } 3831 cp = cp2; 3832 i++; 3833 } 3834 if (!cantparse) { 3835 if (ip.ival != 0x0) { 3836 rad->sin_addr.s_addr = htonl(ip.ival); 3837 rad->sin_port = htons(port.sval); 3838 } else { 3839 cantparse = 1; 3840 } 3841 } 3842 } else { 3843 cantparse = 1; 3844 if (i > 0) { 3845 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3846 if (error) 3847 goto nfsmout; 3848 } 3849 } 3850 if (cantparse) { 3851 sad = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3852 rad->sin_addr.s_addr = sad->sin_addr.s_addr; 3853 rad->sin_port = 0x0; 3854 clp->lc_program = 0; 3855 } 3856nfsmout: 3857 NFSEXITCODE2(error, nd); 3858 return (error); 3859} 3860 3861/* 3862 * Turn a string of up to three decimal digits into a number. Return -1 upon 3863 * error. 3864 */ 3865static int 3866nfsrv_getipnumber(u_char *cp) 3867{ 3868 int i = 0, j = 0; 3869 3870 while (*cp) { 3871 if (j > 2 || *cp < '0' || *cp > '9') 3872 return (-1); 3873 i *= 10; 3874 i += (*cp - '0'); 3875 cp++; 3876 j++; 3877 } 3878 if (i < 256) 3879 return (i); 3880 return (-1); 3881} 3882 3883/* 3884 * This function checks for restart conditions. 3885 */ 3886static int 3887nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 3888 nfsv4stateid_t *stateidp, int specialid) 3889{ 3890 int ret = 0; 3891 3892 /* 3893 * First check for a server restart. Open, LockT, ReleaseLockOwner 3894 * and DelegPurge have a clientid, the rest a stateid. 3895 */ 3896 if (flags & 3897 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 3898 if (clientid.lval[0] != nfsrvboottime) { 3899 ret = NFSERR_STALECLIENTID; 3900 goto out; 3901 } 3902 } else if (stateidp->other[0] != nfsrvboottime && 3903 specialid == 0) { 3904 ret = NFSERR_STALESTATEID; 3905 goto out; 3906 } 3907 3908 /* 3909 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 3910 * not use a lock/open owner seqid#, so the check can be done now. 3911 * (The others will be checked, as required, later.) 3912 */ 3913 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 3914 goto out; 3915 3916 NFSLOCKSTATE(); 3917 ret = nfsrv_checkgrace(NULL, NULL, flags); 3918 NFSUNLOCKSTATE(); 3919 3920out: 3921 NFSEXITCODE(ret); 3922 return (ret); 3923} 3924 3925/* 3926 * Check for grace. 3927 */ 3928static int 3929nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 3930 u_int32_t flags) 3931{ 3932 int error = 0; 3933 3934 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) { 3935 if (flags & NFSLCK_RECLAIM) { 3936 error = NFSERR_NOGRACE; 3937 goto out; 3938 } 3939 } else { 3940 if (!(flags & NFSLCK_RECLAIM)) { 3941 error = NFSERR_GRACE; 3942 goto out; 3943 } 3944 if (nd != NULL && clp != NULL && 3945 (nd->nd_flag & ND_NFSV41) != 0 && 3946 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 3947 error = NFSERR_NOGRACE; 3948 goto out; 3949 } 3950 3951 /* 3952 * If grace is almost over and we are still getting Reclaims, 3953 * extend grace a bit. 3954 */ 3955 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 3956 nfsrv_stablefirst.nsf_eograce) 3957 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 3958 NFSRV_LEASEDELTA; 3959 } 3960 3961out: 3962 NFSEXITCODE(error); 3963 return (error); 3964} 3965 3966/* 3967 * Do a server callback. 3968 */ 3969static int 3970nfsrv_docallback(struct nfsclient *clp, int procnum, 3971 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 3972 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 3973{ 3974 mbuf_t m; 3975 u_int32_t *tl; 3976 struct nfsrv_descript nfsd, *nd = &nfsd; 3977 struct ucred *cred; 3978 int error = 0; 3979 u_int32_t callback; 3980 struct nfsdsession *sep = NULL; 3981 3982 cred = newnfs_getcred(); 3983 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 3984 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 3985 NFSUNLOCKSTATE(); 3986 panic("docallb"); 3987 } 3988 clp->lc_cbref++; 3989 3990 /* 3991 * Fill the callback program# and version into the request 3992 * structure for newnfs_connect() to use. 3993 */ 3994 clp->lc_req.nr_prog = clp->lc_program; 3995#ifdef notnow 3996 if ((clp->lc_flags & LCL_NFSV41) != 0) 3997 clp->lc_req.nr_vers = NFSV41_CBVERS; 3998 else 3999#endif 4000 clp->lc_req.nr_vers = NFSV4_CBVERS; 4001 4002 /* 4003 * First, fill in some of the fields of nd and cr. 4004 */ 4005 nd->nd_flag = ND_NFSV4; 4006 if (clp->lc_flags & LCL_GSS) 4007 nd->nd_flag |= ND_KERBV; 4008 if ((clp->lc_flags & LCL_NFSV41) != 0) 4009 nd->nd_flag |= ND_NFSV41; 4010 nd->nd_repstat = 0; 4011 cred->cr_uid = clp->lc_uid; 4012 cred->cr_gid = clp->lc_gid; 4013 callback = clp->lc_callback; 4014 NFSUNLOCKSTATE(); 4015 cred->cr_ngroups = 1; 4016 4017 /* 4018 * Get the first mbuf for the request. 4019 */ 4020 MGET(m, M_WAITOK, MT_DATA); 4021 mbuf_setlen(m, 0); 4022 nd->nd_mreq = nd->nd_mb = m; 4023 nd->nd_bpos = NFSMTOD(m, caddr_t); 4024 4025 /* 4026 * and build the callback request. 4027 */ 4028 if (procnum == NFSV4OP_CBGETATTR) { 4029 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4030 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4031 "CB Getattr", &sep); 4032 if (error != 0) { 4033 mbuf_freem(nd->nd_mreq); 4034 goto errout; 4035 } 4036 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4037 (void)nfsrv_putattrbit(nd, attrbitp); 4038 } else if (procnum == NFSV4OP_CBRECALL) { 4039 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4040 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4041 "CB Recall", &sep); 4042 if (error != 0) { 4043 mbuf_freem(nd->nd_mreq); 4044 goto errout; 4045 } 4046 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4047 *tl++ = txdr_unsigned(stateidp->seqid); 4048 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4049 NFSX_STATEIDOTHER); 4050 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4051 if (trunc) 4052 *tl = newnfs_true; 4053 else 4054 *tl = newnfs_false; 4055 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4056 } else if (procnum == NFSV4PROC_CBNULL) { 4057 nd->nd_procnum = NFSV4PROC_CBNULL; 4058 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4059 error = nfsv4_getcbsession(clp, &sep); 4060 if (error != 0) { 4061 mbuf_freem(nd->nd_mreq); 4062 goto errout; 4063 } 4064 } 4065 } else { 4066 error = NFSERR_SERVERFAULT; 4067 mbuf_freem(nd->nd_mreq); 4068 goto errout; 4069 } 4070 4071 /* 4072 * Call newnfs_connect(), as required, and then newnfs_request(). 4073 */ 4074 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4075 if (clp->lc_req.nr_client == NULL) { 4076 if ((clp->lc_flags & LCL_NFSV41) != 0) 4077 error = ECONNREFUSED; 4078 else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4079 error = newnfs_connect(NULL, &clp->lc_req, cred, 4080 NULL, 1); 4081 else 4082 error = newnfs_connect(NULL, &clp->lc_req, cred, 4083 NULL, 3); 4084 } 4085 newnfs_sndunlock(&clp->lc_req.nr_lock); 4086 if (!error) { 4087 if ((nd->nd_flag & ND_NFSV41) != 0) { 4088 KASSERT(sep != NULL, ("sep NULL")); 4089 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4090 NULL, NULL, cred, clp->lc_program, 4091 clp->lc_req.nr_vers, NULL, 1, NULL, 4092 &sep->sess_cbsess); 4093 nfsrv_freesession(sep, NULL); 4094 } else 4095 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4096 NULL, NULL, cred, clp->lc_program, 4097 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4098 } 4099errout: 4100 NFSFREECRED(cred); 4101 4102 /* 4103 * If error is set here, the Callback path isn't working 4104 * properly, so twiddle the appropriate LCL_ flags. 4105 * (nd_repstat != 0 indicates the Callback path is working, 4106 * but the callback failed on the client.) 4107 */ 4108 if (error) { 4109 /* 4110 * Mark the callback pathway down, which disabled issuing 4111 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4112 */ 4113 NFSLOCKSTATE(); 4114 clp->lc_flags |= LCL_CBDOWN; 4115 NFSUNLOCKSTATE(); 4116 } else { 4117 /* 4118 * Callback worked. If the callback path was down, disable 4119 * callbacks, so no more delegations will be issued. (This 4120 * is done on the assumption that the callback pathway is 4121 * flakey.) 4122 */ 4123 NFSLOCKSTATE(); 4124 if (clp->lc_flags & LCL_CBDOWN) 4125 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4126 NFSUNLOCKSTATE(); 4127 if (nd->nd_repstat) 4128 error = nd->nd_repstat; 4129 else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4130 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4131 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4132 p, NULL); 4133 mbuf_freem(nd->nd_mrep); 4134 } 4135 NFSLOCKSTATE(); 4136 clp->lc_cbref--; 4137 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4138 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4139 wakeup(clp); 4140 } 4141 NFSUNLOCKSTATE(); 4142 4143 NFSEXITCODE(error); 4144 return (error); 4145} 4146 4147/* 4148 * Set up the compound RPC for the callback. 4149 */ 4150static int 4151nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4152 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp) 4153{ 4154 uint32_t *tl; 4155 int error, len; 4156 4157 len = strlen(optag); 4158 (void)nfsm_strtom(nd, optag, len); 4159 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4160 if ((nd->nd_flag & ND_NFSV41) != 0) { 4161 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4162 *tl++ = txdr_unsigned(callback); 4163 *tl++ = txdr_unsigned(2); 4164 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4165 error = nfsv4_setcbsequence(nd, clp, 1, sepp); 4166 if (error != 0) 4167 return (error); 4168 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4169 *tl = txdr_unsigned(op); 4170 } else { 4171 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4172 *tl++ = txdr_unsigned(callback); 4173 *tl++ = txdr_unsigned(1); 4174 *tl = txdr_unsigned(op); 4175 } 4176 return (0); 4177} 4178 4179/* 4180 * Return the next index# for a clientid. Mostly just increment and return 4181 * the next one, but... if the 32bit unsigned does actually wrap around, 4182 * it should be rebooted. 4183 * At an average rate of one new client per second, it will wrap around in 4184 * approximately 136 years. (I think the server will have been shut 4185 * down or rebooted before then.) 4186 */ 4187static u_int32_t 4188nfsrv_nextclientindex(void) 4189{ 4190 static u_int32_t client_index = 0; 4191 4192 client_index++; 4193 if (client_index != 0) 4194 return (client_index); 4195 4196 printf("%s: out of clientids\n", __func__); 4197 return (client_index); 4198} 4199 4200/* 4201 * Return the next index# for a stateid. Mostly just increment and return 4202 * the next one, but... if the 32bit unsigned does actually wrap around 4203 * (will a BSD server stay up that long?), find 4204 * new start and end values. 4205 */ 4206static u_int32_t 4207nfsrv_nextstateindex(struct nfsclient *clp) 4208{ 4209 struct nfsstate *stp; 4210 int i; 4211 u_int32_t canuse, min_index, max_index; 4212 4213 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4214 clp->lc_stateindex++; 4215 if (clp->lc_stateindex != clp->lc_statemaxindex) 4216 return (clp->lc_stateindex); 4217 } 4218 4219 /* 4220 * Yuck, we've hit the end. 4221 * Look for a new min and max. 4222 */ 4223 min_index = 0; 4224 max_index = 0xffffffff; 4225 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 4226 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4227 if (stp->ls_stateid.other[2] > 0x80000000) { 4228 if (stp->ls_stateid.other[2] < max_index) 4229 max_index = stp->ls_stateid.other[2]; 4230 } else { 4231 if (stp->ls_stateid.other[2] > min_index) 4232 min_index = stp->ls_stateid.other[2]; 4233 } 4234 } 4235 } 4236 4237 /* 4238 * Yikes, highly unlikely, but I'll handle it anyhow. 4239 */ 4240 if (min_index == 0x80000000 && max_index == 0x80000001) { 4241 canuse = 0; 4242 /* 4243 * Loop around until we find an unused entry. Return that 4244 * and set LCL_INDEXNOTOK, so the search will continue next time. 4245 * (This is one of those rare cases where a goto is the 4246 * cleanest way to code the loop.) 4247 */ 4248tryagain: 4249 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 4250 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4251 if (stp->ls_stateid.other[2] == canuse) { 4252 canuse++; 4253 goto tryagain; 4254 } 4255 } 4256 } 4257 clp->lc_flags |= LCL_INDEXNOTOK; 4258 return (canuse); 4259 } 4260 4261 /* 4262 * Ok to start again from min + 1. 4263 */ 4264 clp->lc_stateindex = min_index + 1; 4265 clp->lc_statemaxindex = max_index; 4266 clp->lc_flags &= ~LCL_INDEXNOTOK; 4267 return (clp->lc_stateindex); 4268} 4269 4270/* 4271 * The following functions handle the stable storage file that deals with 4272 * the edge conditions described in RFC3530 Sec. 8.6.3. 4273 * The file is as follows: 4274 * - a single record at the beginning that has the lease time of the 4275 * previous server instance (before the last reboot) and the nfsrvboottime 4276 * values for the previous server boots. 4277 * These previous boot times are used to ensure that the current 4278 * nfsrvboottime does not, somehow, get set to a previous one. 4279 * (This is important so that Stale ClientIDs and StateIDs can 4280 * be recognized.) 4281 * The number of previous nfsvrboottime values preceeds the list. 4282 * - followed by some number of appended records with: 4283 * - client id string 4284 * - flag that indicates it is a record revoking state via lease 4285 * expiration or similar 4286 * OR has successfully acquired state. 4287 * These structures vary in length, with the client string at the end, up 4288 * to NFSV4_OPAQUELIMIT in size. 4289 * 4290 * At the end of the grace period, the file is truncated, the first 4291 * record is rewritten with updated information and any acquired state 4292 * records for successful reclaims of state are written. 4293 * 4294 * Subsequent records are appended when the first state is issued to 4295 * a client and when state is revoked for a client. 4296 * 4297 * When reading the file in, state issued records that come later in 4298 * the file override older ones, since the append log is in cronological order. 4299 * If, for some reason, the file can't be read, the grace period is 4300 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4301 */ 4302 4303/* 4304 * Read in the stable storage file. Called by nfssvc() before the nfsd 4305 * processes start servicing requests. 4306 */ 4307APPLESTATIC void 4308nfsrv_setupstable(NFSPROC_T *p) 4309{ 4310 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4311 struct nfsrv_stable *sp, *nsp; 4312 struct nfst_rec *tsp; 4313 int error, i, tryagain; 4314 off_t off = 0; 4315 ssize_t aresid, len; 4316 4317 /* 4318 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4319 * a reboot, so state has not been lost. 4320 */ 4321 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4322 return; 4323 /* 4324 * Set Grace over just until the file reads successfully. 4325 */ 4326 nfsrvboottime = time_second; 4327 LIST_INIT(&sf->nsf_head); 4328 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4329 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4330 if (sf->nsf_fp == NULL) 4331 return; 4332 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4333 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4334 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4335 if (error || aresid || sf->nsf_numboots == 0 || 4336 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4337 return; 4338 4339 /* 4340 * Now, read in the boottimes. 4341 */ 4342 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4343 sizeof (time_t), M_TEMP, M_WAITOK); 4344 off = sizeof (struct nfsf_rec); 4345 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4346 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4347 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4348 if (error || aresid) { 4349 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4350 sf->nsf_bootvals = NULL; 4351 return; 4352 } 4353 4354 /* 4355 * Make sure this nfsrvboottime is different from all recorded 4356 * previous ones. 4357 */ 4358 do { 4359 tryagain = 0; 4360 for (i = 0; i < sf->nsf_numboots; i++) { 4361 if (nfsrvboottime == sf->nsf_bootvals[i]) { 4362 nfsrvboottime++; 4363 tryagain = 1; 4364 break; 4365 } 4366 } 4367 } while (tryagain); 4368 4369 sf->nsf_flags |= NFSNSF_OK; 4370 off += (sf->nsf_numboots * sizeof (time_t)); 4371 4372 /* 4373 * Read through the file, building a list of records for grace 4374 * checking. 4375 * Each record is between sizeof (struct nfst_rec) and 4376 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4377 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4378 */ 4379 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4380 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4381 do { 4382 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4383 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4384 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4385 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4386 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4387 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4388 /* 4389 * Yuck, the file has been corrupted, so just return 4390 * after clearing out any restart state, so the grace period 4391 * is over. 4392 */ 4393 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4394 LIST_REMOVE(sp, nst_list); 4395 free((caddr_t)sp, M_TEMP); 4396 } 4397 free((caddr_t)tsp, M_TEMP); 4398 sf->nsf_flags &= ~NFSNSF_OK; 4399 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4400 sf->nsf_bootvals = NULL; 4401 return; 4402 } 4403 if (len > 0) { 4404 off += sizeof (struct nfst_rec) + tsp->len - 1; 4405 /* 4406 * Search the list for a matching client. 4407 */ 4408 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4409 if (tsp->len == sp->nst_len && 4410 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4411 break; 4412 } 4413 if (sp == LIST_END(&sf->nsf_head)) { 4414 sp = (struct nfsrv_stable *)malloc(tsp->len + 4415 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4416 M_WAITOK); 4417 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4418 sizeof (struct nfst_rec) + tsp->len - 1); 4419 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4420 } else { 4421 if (tsp->flag == NFSNST_REVOKE) 4422 sp->nst_flag |= NFSNST_REVOKE; 4423 else 4424 /* 4425 * A subsequent timestamp indicates the client 4426 * did a setclientid/confirm and any previous 4427 * revoke is no longer relevant. 4428 */ 4429 sp->nst_flag &= ~NFSNST_REVOKE; 4430 } 4431 } 4432 } while (len > 0); 4433 free((caddr_t)tsp, M_TEMP); 4434 sf->nsf_flags = NFSNSF_OK; 4435 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4436 NFSRV_LEASEDELTA; 4437} 4438 4439/* 4440 * Update the stable storage file, now that the grace period is over. 4441 */ 4442APPLESTATIC void 4443nfsrv_updatestable(NFSPROC_T *p) 4444{ 4445 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4446 struct nfsrv_stable *sp, *nsp; 4447 int i; 4448 struct nfsvattr nva; 4449 vnode_t vp; 4450#if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4451 mount_t mp = NULL; 4452#endif 4453 int error; 4454 4455 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4456 return; 4457 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4458 /* 4459 * Ok, we need to rewrite the stable storage file. 4460 * - truncate to 0 length 4461 * - write the new first structure 4462 * - loop through the data structures, writing out any that 4463 * have timestamps older than the old boot 4464 */ 4465 if (sf->nsf_bootvals) { 4466 sf->nsf_numboots++; 4467 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4468 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4469 } else { 4470 sf->nsf_numboots = 1; 4471 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4472 M_TEMP, M_WAITOK); 4473 } 4474 sf->nsf_bootvals[0] = nfsrvboottime; 4475 sf->nsf_lease = nfsrv_lease; 4476 NFSVNO_ATTRINIT(&nva); 4477 NFSVNO_SETATTRVAL(&nva, size, 0); 4478 vp = NFSFPVNODE(sf->nsf_fp); 4479 vn_start_write(vp, &mp, V_WAIT); 4480 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4481 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4482 NULL); 4483 NFSVOPUNLOCK(vp, 0); 4484 } else 4485 error = EPERM; 4486 vn_finished_write(mp); 4487 if (!error) 4488 error = NFSD_RDWR(UIO_WRITE, vp, 4489 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4490 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4491 if (!error) 4492 error = NFSD_RDWR(UIO_WRITE, vp, 4493 (caddr_t)sf->nsf_bootvals, 4494 sf->nsf_numboots * sizeof (time_t), 4495 (off_t)(sizeof (struct nfsf_rec)), 4496 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4497 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4498 sf->nsf_bootvals = NULL; 4499 if (error) { 4500 sf->nsf_flags &= ~NFSNSF_OK; 4501 printf("EEK! Can't write NfsV4 stable storage file\n"); 4502 return; 4503 } 4504 sf->nsf_flags |= NFSNSF_OK; 4505 4506 /* 4507 * Loop through the list and write out timestamp records for 4508 * any clients that successfully reclaimed state. 4509 */ 4510 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4511 if (sp->nst_flag & NFSNST_GOTSTATE) { 4512 nfsrv_writestable(sp->nst_client, sp->nst_len, 4513 NFSNST_NEWSTATE, p); 4514 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4515 } 4516 LIST_REMOVE(sp, nst_list); 4517 free((caddr_t)sp, M_TEMP); 4518 } 4519 nfsrv_backupstable(); 4520} 4521 4522/* 4523 * Append a record to the stable storage file. 4524 */ 4525APPLESTATIC void 4526nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4527{ 4528 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4529 struct nfst_rec *sp; 4530 int error; 4531 4532 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4533 return; 4534 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4535 len - 1, M_TEMP, M_WAITOK); 4536 sp->len = len; 4537 NFSBCOPY(client, sp->client, len); 4538 sp->flag = flag; 4539 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 4540 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 4541 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 4542 free((caddr_t)sp, M_TEMP); 4543 if (error) { 4544 sf->nsf_flags &= ~NFSNSF_OK; 4545 printf("EEK! Can't write NfsV4 stable storage file\n"); 4546 } 4547} 4548 4549/* 4550 * This function is called during the grace period to mark a client 4551 * that successfully reclaimed state. 4552 */ 4553static void 4554nfsrv_markstable(struct nfsclient *clp) 4555{ 4556 struct nfsrv_stable *sp; 4557 4558 /* 4559 * First find the client structure. 4560 */ 4561 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4562 if (sp->nst_len == clp->lc_idlen && 4563 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4564 break; 4565 } 4566 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4567 return; 4568 4569 /* 4570 * Now, just mark it and set the nfsclient back pointer. 4571 */ 4572 sp->nst_flag |= NFSNST_GOTSTATE; 4573 sp->nst_clp = clp; 4574} 4575 4576/* 4577 * This function is called for a reclaim, to see if it gets grace. 4578 * It returns 0 if a reclaim is allowed, 1 otherwise. 4579 */ 4580static int 4581nfsrv_checkstable(struct nfsclient *clp) 4582{ 4583 struct nfsrv_stable *sp; 4584 4585 /* 4586 * First, find the entry for the client. 4587 */ 4588 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4589 if (sp->nst_len == clp->lc_idlen && 4590 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4591 break; 4592 } 4593 4594 /* 4595 * If not in the list, state was revoked or no state was issued 4596 * since the previous reboot, a reclaim is denied. 4597 */ 4598 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 4599 (sp->nst_flag & NFSNST_REVOKE) || 4600 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 4601 return (1); 4602 return (0); 4603} 4604 4605/* 4606 * Test for and try to clear out a conflicting client. This is called by 4607 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 4608 * a found. 4609 * The trick here is that it can't revoke a conflicting client with an 4610 * expired lease unless it holds the v4root lock, so... 4611 * If no v4root lock, get the lock and return 1 to indicate "try again". 4612 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 4613 * the revocation worked and the conflicting client is "bye, bye", so it 4614 * can be tried again. 4615 * Return 2 to indicate that the vnode is VI_DOOMED after NFSVOPLOCK(). 4616 * Unlocks State before a non-zero value is returned. 4617 */ 4618static int 4619nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 4620 NFSPROC_T *p) 4621{ 4622 int gotlock, lktype; 4623 4624 /* 4625 * If lease hasn't expired, we can't fix it. 4626 */ 4627 if (clp->lc_expiry >= NFSD_MONOSEC || 4628 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 4629 return (0); 4630 if (*haslockp == 0) { 4631 NFSUNLOCKSTATE(); 4632 lktype = NFSVOPISLOCKED(vp); 4633 NFSVOPUNLOCK(vp, 0); 4634 NFSLOCKV4ROOTMUTEX(); 4635 nfsv4_relref(&nfsv4rootfs_lock); 4636 do { 4637 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4638 NFSV4ROOTLOCKMUTEXPTR, NULL); 4639 } while (!gotlock); 4640 NFSUNLOCKV4ROOTMUTEX(); 4641 *haslockp = 1; 4642 NFSVOPLOCK(vp, lktype | LK_RETRY); 4643 if ((vp->v_iflag & VI_DOOMED) != 0) 4644 return (2); 4645 else 4646 return (1); 4647 } 4648 NFSUNLOCKSTATE(); 4649 4650 /* 4651 * Ok, we can expire the conflicting client. 4652 */ 4653 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4654 nfsrv_backupstable(); 4655 nfsrv_cleanclient(clp, p); 4656 nfsrv_freedeleglist(&clp->lc_deleg); 4657 nfsrv_freedeleglist(&clp->lc_olddeleg); 4658 LIST_REMOVE(clp, lc_hash); 4659 nfsrv_zapclient(clp, p); 4660 return (1); 4661} 4662 4663/* 4664 * Resolve a delegation conflict. 4665 * Returns 0 to indicate the conflict was resolved without sleeping. 4666 * Return -1 to indicate that the caller should check for conflicts again. 4667 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 4668 * 4669 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 4670 * for a return of 0, since there was no sleep and it could be required 4671 * later. It is released for a return of NFSERR_DELAY, since the caller 4672 * will return that error. It is released when a sleep was done waiting 4673 * for the delegation to be returned or expire (so that other nfsds can 4674 * handle ops). Then, it must be acquired for the write to stable storage. 4675 * (This function is somewhat similar to nfsrv_clientconflict(), but 4676 * the semantics differ in a couple of subtle ways. The return of 0 4677 * indicates the conflict was resolved without sleeping here, not 4678 * that the conflict can't be resolved and the handling of nfsv4root_lock 4679 * differs, as noted above.) 4680 * Unlocks State before returning a non-zero value. 4681 */ 4682static int 4683nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 4684 vnode_t vp) 4685{ 4686 struct nfsclient *clp = stp->ls_clp; 4687 int gotlock, error, lktype, retrycnt, zapped_clp; 4688 nfsv4stateid_t tstateid; 4689 fhandle_t tfh; 4690 4691 /* 4692 * If the conflict is with an old delegation... 4693 */ 4694 if (stp->ls_flags & NFSLCK_OLDDELEG) { 4695 /* 4696 * You can delete it, if it has expired. 4697 */ 4698 if (clp->lc_delegtime < NFSD_MONOSEC) { 4699 nfsrv_freedeleg(stp); 4700 NFSUNLOCKSTATE(); 4701 error = -1; 4702 goto out; 4703 } 4704 NFSUNLOCKSTATE(); 4705 /* 4706 * During this delay, the old delegation could expire or it 4707 * could be recovered by the client via an Open with 4708 * CLAIM_DELEGATE_PREV. 4709 * Release the nfsv4root_lock, if held. 4710 */ 4711 if (*haslockp) { 4712 *haslockp = 0; 4713 NFSLOCKV4ROOTMUTEX(); 4714 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4715 NFSUNLOCKV4ROOTMUTEX(); 4716 } 4717 error = NFSERR_DELAY; 4718 goto out; 4719 } 4720 4721 /* 4722 * It's a current delegation, so: 4723 * - check to see if the delegation has expired 4724 * - if so, get the v4root lock and then expire it 4725 */ 4726 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 4727 /* 4728 * - do a recall callback, since not yet done 4729 * For now, never allow truncate to be set. To use 4730 * truncate safely, it must be guaranteed that the 4731 * Remove, Rename or Setattr with size of 0 will 4732 * succeed and that would require major changes to 4733 * the VFS/Vnode OPs. 4734 * Set the expiry time large enough so that it won't expire 4735 * until after the callback, then set it correctly, once 4736 * the callback is done. (The delegation will now time 4737 * out whether or not the Recall worked ok. The timeout 4738 * will be extended when ops are done on the delegation 4739 * stateid, up to the timelimit.) 4740 */ 4741 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 4742 NFSRV_LEASEDELTA; 4743 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 4744 NFSRV_LEASEDELTA; 4745 stp->ls_flags |= NFSLCK_DELEGRECALL; 4746 4747 /* 4748 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 4749 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 4750 * in order to try and avoid a race that could happen 4751 * when a CBRecall request passed the Open reply with 4752 * the delegation in it when transitting the network. 4753 * Since nfsrv_docallback will sleep, don't use stp after 4754 * the call. 4755 */ 4756 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 4757 sizeof (tstateid)); 4758 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 4759 sizeof (tfh)); 4760 NFSUNLOCKSTATE(); 4761 if (*haslockp) { 4762 *haslockp = 0; 4763 NFSLOCKV4ROOTMUTEX(); 4764 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4765 NFSUNLOCKV4ROOTMUTEX(); 4766 } 4767 retrycnt = 0; 4768 do { 4769 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 4770 &tstateid, 0, &tfh, NULL, NULL, p); 4771 retrycnt++; 4772 } while ((error == NFSERR_BADSTATEID || 4773 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 4774 error = NFSERR_DELAY; 4775 goto out; 4776 } 4777 4778 if (clp->lc_expiry >= NFSD_MONOSEC && 4779 stp->ls_delegtime >= NFSD_MONOSEC) { 4780 NFSUNLOCKSTATE(); 4781 /* 4782 * A recall has been done, but it has not yet expired. 4783 * So, RETURN_DELAY. 4784 */ 4785 if (*haslockp) { 4786 *haslockp = 0; 4787 NFSLOCKV4ROOTMUTEX(); 4788 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4789 NFSUNLOCKV4ROOTMUTEX(); 4790 } 4791 error = NFSERR_DELAY; 4792 goto out; 4793 } 4794 4795 /* 4796 * If we don't yet have the lock, just get it and then return, 4797 * since we need that before deleting expired state, such as 4798 * this delegation. 4799 * When getting the lock, unlock the vnode, so other nfsds that 4800 * are in progress, won't get stuck waiting for the vnode lock. 4801 */ 4802 if (*haslockp == 0) { 4803 NFSUNLOCKSTATE(); 4804 lktype = NFSVOPISLOCKED(vp); 4805 NFSVOPUNLOCK(vp, 0); 4806 NFSLOCKV4ROOTMUTEX(); 4807 nfsv4_relref(&nfsv4rootfs_lock); 4808 do { 4809 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4810 NFSV4ROOTLOCKMUTEXPTR, NULL); 4811 } while (!gotlock); 4812 NFSUNLOCKV4ROOTMUTEX(); 4813 *haslockp = 1; 4814 NFSVOPLOCK(vp, lktype | LK_RETRY); 4815 if ((vp->v_iflag & VI_DOOMED) != 0) { 4816 *haslockp = 0; 4817 NFSLOCKV4ROOTMUTEX(); 4818 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4819 NFSUNLOCKV4ROOTMUTEX(); 4820 error = NFSERR_PERM; 4821 goto out; 4822 } 4823 error = -1; 4824 goto out; 4825 } 4826 4827 NFSUNLOCKSTATE(); 4828 /* 4829 * Ok, we can delete the expired delegation. 4830 * First, write the Revoke record to stable storage and then 4831 * clear out the conflict. 4832 * Since all other nfsd threads are now blocked, we can safely 4833 * sleep without the state changing. 4834 */ 4835 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4836 nfsrv_backupstable(); 4837 if (clp->lc_expiry < NFSD_MONOSEC) { 4838 nfsrv_cleanclient(clp, p); 4839 nfsrv_freedeleglist(&clp->lc_deleg); 4840 nfsrv_freedeleglist(&clp->lc_olddeleg); 4841 LIST_REMOVE(clp, lc_hash); 4842 zapped_clp = 1; 4843 } else { 4844 nfsrv_freedeleg(stp); 4845 zapped_clp = 0; 4846 } 4847 if (zapped_clp) 4848 nfsrv_zapclient(clp, p); 4849 error = -1; 4850 4851out: 4852 NFSEXITCODE(error); 4853 return (error); 4854} 4855 4856/* 4857 * Check for a remove allowed, if remove is set to 1 and get rid of 4858 * delegations. 4859 */ 4860APPLESTATIC int 4861nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p) 4862{ 4863 struct nfsstate *stp; 4864 struct nfslockfile *lfp; 4865 int error, haslock = 0; 4866 fhandle_t nfh; 4867 4868 /* 4869 * First, get the lock file structure. 4870 * (A return of -1 means no associated state, so remove ok.) 4871 */ 4872 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 4873tryagain: 4874 NFSLOCKSTATE(); 4875 if (!error) 4876 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 4877 if (error) { 4878 NFSUNLOCKSTATE(); 4879 if (haslock) { 4880 NFSLOCKV4ROOTMUTEX(); 4881 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4882 NFSUNLOCKV4ROOTMUTEX(); 4883 } 4884 if (error == -1) 4885 error = 0; 4886 goto out; 4887 } 4888 4889 /* 4890 * Now, we must Recall any delegations. 4891 */ 4892 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p); 4893 if (error) { 4894 /* 4895 * nfsrv_cleandeleg() unlocks state for non-zero 4896 * return. 4897 */ 4898 if (error == -1) 4899 goto tryagain; 4900 if (haslock) { 4901 NFSLOCKV4ROOTMUTEX(); 4902 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4903 NFSUNLOCKV4ROOTMUTEX(); 4904 } 4905 goto out; 4906 } 4907 4908 /* 4909 * Now, look for a conflicting open share. 4910 */ 4911 if (remove) { 4912 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 4913 if (stp->ls_flags & NFSLCK_WRITEDENY) { 4914 error = NFSERR_FILEOPEN; 4915 break; 4916 } 4917 } 4918 } 4919 4920 NFSUNLOCKSTATE(); 4921 if (haslock) { 4922 NFSLOCKV4ROOTMUTEX(); 4923 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4924 NFSUNLOCKV4ROOTMUTEX(); 4925 } 4926 4927out: 4928 NFSEXITCODE(error); 4929 return (error); 4930} 4931 4932/* 4933 * Clear out all delegations for the file referred to by lfp. 4934 * May return NFSERR_DELAY, if there will be a delay waiting for 4935 * delegations to expire. 4936 * Returns -1 to indicate it slept while recalling a delegation. 4937 * This function has the side effect of deleting the nfslockfile structure, 4938 * if it no longer has associated state and didn't have to sleep. 4939 * Unlocks State before a non-zero value is returned. 4940 */ 4941static int 4942nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 4943 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 4944{ 4945 struct nfsstate *stp, *nstp; 4946 int ret = 0; 4947 4948 stp = LIST_FIRST(&lfp->lf_deleg); 4949 while (stp != LIST_END(&lfp->lf_deleg)) { 4950 nstp = LIST_NEXT(stp, ls_file); 4951 if (stp->ls_clp != clp) { 4952 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 4953 if (ret) { 4954 /* 4955 * nfsrv_delegconflict() unlocks state 4956 * when it returns non-zero. 4957 */ 4958 goto out; 4959 } 4960 } 4961 stp = nstp; 4962 } 4963out: 4964 NFSEXITCODE(ret); 4965 return (ret); 4966} 4967 4968/* 4969 * There are certain operations that, when being done outside of NFSv4, 4970 * require that any NFSv4 delegation for the file be recalled. 4971 * This function is to be called for those cases: 4972 * VOP_RENAME() - When a delegation is being recalled for any reason, 4973 * the client may have to do Opens against the server, using the file's 4974 * final component name. If the file has been renamed on the server, 4975 * that component name will be incorrect and the Open will fail. 4976 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 4977 * been removed on the server, if there is a delegation issued to 4978 * that client for the file. I say "theoretically" since clients 4979 * normally do an Access Op before the Open and that Access Op will 4980 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 4981 * they will detect the file's removal in the same manner. (There is 4982 * one case where RFC3530 allows a client to do an Open without first 4983 * doing an Access Op, which is passage of a check against the ACE 4984 * returned with a Write delegation, but current practice is to ignore 4985 * the ACE and always do an Access Op.) 4986 * Since the functions can only be called with an unlocked vnode, this 4987 * can't be done at this time. 4988 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 4989 * locks locally in the client, which are not visible to the server. To 4990 * deal with this, issuing of delegations for a vnode must be disabled 4991 * and all delegations for the vnode recalled. This is done via the 4992 * second function, using the VV_DISABLEDELEG vflag on the vnode. 4993 */ 4994APPLESTATIC void 4995nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 4996{ 4997 time_t starttime; 4998 int error; 4999 5000 /* 5001 * First, check to see if the server is currently running and it has 5002 * been called for a regular file when issuing delegations. 5003 */ 5004 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 5005 nfsrv_issuedelegs == 0) 5006 return; 5007 5008 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5009 /* 5010 * First, get a reference on the nfsv4rootfs_lock so that an 5011 * exclusive lock cannot be acquired by another thread. 5012 */ 5013 NFSLOCKV4ROOTMUTEX(); 5014 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5015 NFSUNLOCKV4ROOTMUTEX(); 5016 5017 /* 5018 * Now, call nfsrv_checkremove() in a loop while it returns 5019 * NFSERR_DELAY. Return upon any other error or when timed out. 5020 */ 5021 starttime = NFSD_MONOSEC; 5022 do { 5023 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5024 error = nfsrv_checkremove(vp, 0, p); 5025 NFSVOPUNLOCK(vp, 0); 5026 } else 5027 error = EPERM; 5028 if (error == NFSERR_DELAY) { 5029 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5030 break; 5031 /* Sleep for a short period of time */ 5032 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5033 } 5034 } while (error == NFSERR_DELAY); 5035 NFSLOCKV4ROOTMUTEX(); 5036 nfsv4_relref(&nfsv4rootfs_lock); 5037 NFSUNLOCKV4ROOTMUTEX(); 5038} 5039 5040APPLESTATIC void 5041nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5042{ 5043 5044#ifdef VV_DISABLEDELEG 5045 /* 5046 * First, flag issuance of delegations disabled. 5047 */ 5048 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5049#endif 5050 5051 /* 5052 * Then call nfsd_recalldelegation() to get rid of all extant 5053 * delegations. 5054 */ 5055 nfsd_recalldelegation(vp, p); 5056} 5057 5058/* 5059 * Check for conflicting locks, etc. and then get rid of delegations. 5060 * (At one point I thought that I should get rid of delegations for any 5061 * Setattr, since it could potentially disallow the I/O op (read or write) 5062 * allowed by the delegation. However, Setattr Ops that aren't changing 5063 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5064 * for the same client or a different one, so I decided to only get rid 5065 * of delegations for other clients when the size is being changed.) 5066 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5067 * as Write backs, even if there is no delegation, so it really isn't any 5068 * different?) 5069 */ 5070APPLESTATIC int 5071nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5072 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5073 struct nfsexstuff *exp, NFSPROC_T *p) 5074{ 5075 struct nfsstate st, *stp = &st; 5076 struct nfslock lo, *lop = &lo; 5077 int error = 0; 5078 nfsquad_t clientid; 5079 5080 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5081 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5082 lop->lo_first = nvap->na_size; 5083 } else { 5084 stp->ls_flags = 0; 5085 lop->lo_first = 0; 5086 } 5087 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5088 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5089 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5090 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5091 stp->ls_flags |= NFSLCK_SETATTR; 5092 if (stp->ls_flags == 0) 5093 goto out; 5094 lop->lo_end = NFS64BITSSET; 5095 lop->lo_flags = NFSLCK_WRITE; 5096 stp->ls_ownerlen = 0; 5097 stp->ls_op = NULL; 5098 stp->ls_uid = nd->nd_cred->cr_uid; 5099 stp->ls_stateid.seqid = stateidp->seqid; 5100 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5101 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5102 stp->ls_stateid.other[2] = stateidp->other[2]; 5103 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5104 stateidp, exp, nd, p); 5105 5106out: 5107 NFSEXITCODE2(error, nd); 5108 return (error); 5109} 5110 5111/* 5112 * Check for a write delegation and do a CBGETATTR if there is one, updating 5113 * the attributes, as required. 5114 * Should I return an error if I can't get the attributes? (For now, I'll 5115 * just return ok. 5116 */ 5117APPLESTATIC int 5118nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5119 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, struct ucred *cred, 5120 NFSPROC_T *p) 5121{ 5122 struct nfsstate *stp; 5123 struct nfslockfile *lfp; 5124 struct nfsclient *clp; 5125 struct nfsvattr nva; 5126 fhandle_t nfh; 5127 int error = 0; 5128 nfsattrbit_t cbbits; 5129 u_quad_t delegfilerev; 5130 5131 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5132 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5133 goto out; 5134 5135 /* 5136 * Get the lock file structure. 5137 * (A return of -1 means no associated state, so return ok.) 5138 */ 5139 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5140 NFSLOCKSTATE(); 5141 if (!error) 5142 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5143 if (error) { 5144 NFSUNLOCKSTATE(); 5145 if (error == -1) 5146 error = 0; 5147 goto out; 5148 } 5149 5150 /* 5151 * Now, look for a write delegation. 5152 */ 5153 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5154 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5155 break; 5156 } 5157 if (stp == LIST_END(&lfp->lf_deleg)) { 5158 NFSUNLOCKSTATE(); 5159 goto out; 5160 } 5161 clp = stp->ls_clp; 5162 delegfilerev = stp->ls_filerev; 5163 5164 /* 5165 * If the Write delegation was issued as a part of this Compound RPC 5166 * or if we have an Implied Clientid (used in a previous Op in this 5167 * compound) and it is the client the delegation was issued to, 5168 * just return ok. 5169 * I also assume that it is from the same client iff the network 5170 * host IP address is the same as the callback address. (Not 5171 * exactly correct by the RFC, but avoids a lot of Getattr 5172 * callbacks.) 5173 */ 5174 if (nd->nd_compref == stp->ls_compref || 5175 ((nd->nd_flag & ND_IMPLIEDCLID) && 5176 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5177 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5178 NFSUNLOCKSTATE(); 5179 goto out; 5180 } 5181 5182 /* 5183 * We are now done with the delegation state structure, 5184 * so the statelock can be released and we can now tsleep(). 5185 */ 5186 5187 /* 5188 * Now, we must do the CB Getattr callback, to see if Change or Size 5189 * has changed. 5190 */ 5191 if (clp->lc_expiry >= NFSD_MONOSEC) { 5192 NFSUNLOCKSTATE(); 5193 NFSVNO_ATTRINIT(&nva); 5194 nva.na_filerev = NFS64BITSSET; 5195 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5196 0, &nfh, &nva, &cbbits, p); 5197 if (!error) { 5198 if ((nva.na_filerev != NFS64BITSSET && 5199 nva.na_filerev > delegfilerev) || 5200 (NFSVNO_ISSETSIZE(&nva) && 5201 nva.na_size != nvap->na_size)) { 5202 error = nfsvno_updfilerev(vp, nvap, cred, p); 5203 if (NFSVNO_ISSETSIZE(&nva)) 5204 nvap->na_size = nva.na_size; 5205 } 5206 } else 5207 error = 0; /* Ignore callback errors for now. */ 5208 } else { 5209 NFSUNLOCKSTATE(); 5210 } 5211 5212out: 5213 NFSEXITCODE2(error, nd); 5214 return (error); 5215} 5216 5217/* 5218 * This function looks for openowners that haven't had any opens for 5219 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5220 * is set. 5221 */ 5222APPLESTATIC void 5223nfsrv_throwawayopens(NFSPROC_T *p) 5224{ 5225 struct nfsclient *clp, *nclp; 5226 struct nfsstate *stp, *nstp; 5227 int i; 5228 5229 NFSLOCKSTATE(); 5230 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 5231 /* 5232 * For each client... 5233 */ 5234 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 5235 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5236 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5237 if (LIST_EMPTY(&stp->ls_open) && 5238 (stp->ls_noopens > NFSNOOPEN || 5239 (nfsrv_openpluslock * 2) > 5240 NFSRV_V4STATELIMIT)) 5241 nfsrv_freeopenowner(stp, 0, p); 5242 } 5243 } 5244 } 5245 NFSUNLOCKSTATE(); 5246} 5247 5248/* 5249 * This function checks to see if the credentials are the same. 5250 * Returns 1 for not same, 0 otherwise. 5251 */ 5252static int 5253nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 5254{ 5255 5256 if (nd->nd_flag & ND_GSS) { 5257 if (!(clp->lc_flags & LCL_GSS)) 5258 return (1); 5259 if (clp->lc_flags & LCL_NAME) { 5260 if (nd->nd_princlen != clp->lc_namelen || 5261 NFSBCMP(nd->nd_principal, clp->lc_name, 5262 clp->lc_namelen)) 5263 return (1); 5264 else 5265 return (0); 5266 } 5267 if (nd->nd_cred->cr_uid == clp->lc_uid) 5268 return (0); 5269 else 5270 return (1); 5271 } else if (clp->lc_flags & LCL_GSS) 5272 return (1); 5273 /* 5274 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5275 * in RFC3530, which talks about principals, but doesn't say anything 5276 * about uids for AUTH_SYS.) 5277 */ 5278 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5279 return (0); 5280 else 5281 return (1); 5282} 5283 5284/* 5285 * Calculate the lease expiry time. 5286 */ 5287static time_t 5288nfsrv_leaseexpiry(void) 5289{ 5290 5291 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 5292 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5293 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5294} 5295 5296/* 5297 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5298 */ 5299static void 5300nfsrv_delaydelegtimeout(struct nfsstate *stp) 5301{ 5302 5303 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5304 return; 5305 5306 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5307 stp->ls_delegtime < stp->ls_delegtimelimit) { 5308 stp->ls_delegtime += nfsrv_lease; 5309 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5310 stp->ls_delegtime = stp->ls_delegtimelimit; 5311 } 5312} 5313 5314/* 5315 * This function checks to see if there is any other state associated 5316 * with the openowner for this Open. 5317 * It returns 1 if there is no other state, 0 otherwise. 5318 */ 5319static int 5320nfsrv_nootherstate(struct nfsstate *stp) 5321{ 5322 struct nfsstate *tstp; 5323 5324 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5325 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5326 return (0); 5327 } 5328 return (1); 5329} 5330 5331/* 5332 * Create a list of lock deltas (changes to local byte range locking 5333 * that can be rolled back using the list) and apply the changes via 5334 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5335 * the rollback or update function will be called after this. 5336 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5337 * call fails. If it returns an error, it will unlock the list. 5338 */ 5339static int 5340nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5341 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5342{ 5343 struct nfslock *lop, *nlop; 5344 int error = 0; 5345 5346 /* Loop through the list of locks. */ 5347 lop = LIST_FIRST(&lfp->lf_locallock); 5348 while (first < end && lop != NULL) { 5349 nlop = LIST_NEXT(lop, lo_lckowner); 5350 if (first >= lop->lo_end) { 5351 /* not there yet */ 5352 lop = nlop; 5353 } else if (first < lop->lo_first) { 5354 /* new one starts before entry in list */ 5355 if (end <= lop->lo_first) { 5356 /* no overlap between old and new */ 5357 error = nfsrv_dolocal(vp, lfp, flags, 5358 NFSLCK_UNLOCK, first, end, cfp, p); 5359 if (error != 0) 5360 break; 5361 first = end; 5362 } else { 5363 /* handle fragment overlapped with new one */ 5364 error = nfsrv_dolocal(vp, lfp, flags, 5365 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5366 p); 5367 if (error != 0) 5368 break; 5369 first = lop->lo_first; 5370 } 5371 } else { 5372 /* new one overlaps this entry in list */ 5373 if (end <= lop->lo_end) { 5374 /* overlaps all of new one */ 5375 error = nfsrv_dolocal(vp, lfp, flags, 5376 lop->lo_flags, first, end, cfp, p); 5377 if (error != 0) 5378 break; 5379 first = end; 5380 } else { 5381 /* handle fragment overlapped with new one */ 5382 error = nfsrv_dolocal(vp, lfp, flags, 5383 lop->lo_flags, first, lop->lo_end, cfp, p); 5384 if (error != 0) 5385 break; 5386 first = lop->lo_end; 5387 lop = nlop; 5388 } 5389 } 5390 } 5391 if (first < end && error == 0) 5392 /* handle fragment past end of list */ 5393 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5394 end, cfp, p); 5395 5396 NFSEXITCODE(error); 5397 return (error); 5398} 5399 5400/* 5401 * Local lock unlock. Unlock all byte ranges that are no longer locked 5402 * by NFSv4. To do this, unlock any subranges of first-->end that 5403 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5404 * list. This list has all locks for the file held by other 5405 * <clientid, lockowner> tuples. The list is ordered by increasing 5406 * lo_first value, but may have entries that overlap each other, for 5407 * the case of read locks. 5408 */ 5409static void 5410nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5411 uint64_t init_end, NFSPROC_T *p) 5412{ 5413 struct nfslock *lop; 5414 uint64_t first, end, prevfirst; 5415 5416 first = init_first; 5417 end = init_end; 5418 while (first < init_end) { 5419 /* Loop through all nfs locks, adjusting first and end */ 5420 prevfirst = 0; 5421 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5422 KASSERT(prevfirst <= lop->lo_first, 5423 ("nfsv4 locks out of order")); 5424 KASSERT(lop->lo_first < lop->lo_end, 5425 ("nfsv4 bogus lock")); 5426 prevfirst = lop->lo_first; 5427 if (first >= lop->lo_first && 5428 first < lop->lo_end) 5429 /* 5430 * Overlaps with initial part, so trim 5431 * off that initial part by moving first past 5432 * it. 5433 */ 5434 first = lop->lo_end; 5435 else if (end > lop->lo_first && 5436 lop->lo_first > first) { 5437 /* 5438 * This lock defines the end of the 5439 * segment to unlock, so set end to the 5440 * start of it and break out of the loop. 5441 */ 5442 end = lop->lo_first; 5443 break; 5444 } 5445 if (first >= end) 5446 /* 5447 * There is no segment left to do, so 5448 * break out of this loop and then exit 5449 * the outer while() since first will be set 5450 * to end, which must equal init_end here. 5451 */ 5452 break; 5453 } 5454 if (first < end) { 5455 /* Unlock this segment */ 5456 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 5457 NFSLCK_READ, first, end, NULL, p); 5458 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 5459 first, end); 5460 } 5461 /* 5462 * Now move past this segment and look for any further 5463 * segment in the range, if there is one. 5464 */ 5465 first = end; 5466 end = init_end; 5467 } 5468} 5469 5470/* 5471 * Do the local lock operation and update the rollback list, as required. 5472 * Perform the rollback and return the error if nfsvno_advlock() fails. 5473 */ 5474static int 5475nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 5476 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5477{ 5478 struct nfsrollback *rlp; 5479 int error = 0, ltype, oldltype; 5480 5481 if (flags & NFSLCK_WRITE) 5482 ltype = F_WRLCK; 5483 else if (flags & NFSLCK_READ) 5484 ltype = F_RDLCK; 5485 else 5486 ltype = F_UNLCK; 5487 if (oldflags & NFSLCK_WRITE) 5488 oldltype = F_WRLCK; 5489 else if (oldflags & NFSLCK_READ) 5490 oldltype = F_RDLCK; 5491 else 5492 oldltype = F_UNLCK; 5493 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 5494 /* nothing to do */ 5495 goto out; 5496 error = nfsvno_advlock(vp, ltype, first, end, p); 5497 if (error != 0) { 5498 if (cfp != NULL) { 5499 cfp->cl_clientid.lval[0] = 0; 5500 cfp->cl_clientid.lval[1] = 0; 5501 cfp->cl_first = 0; 5502 cfp->cl_end = NFS64BITSSET; 5503 cfp->cl_flags = NFSLCK_WRITE; 5504 cfp->cl_ownerlen = 5; 5505 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 5506 } 5507 nfsrv_locallock_rollback(vp, lfp, p); 5508 } else if (ltype != F_UNLCK) { 5509 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 5510 M_WAITOK); 5511 rlp->rlck_first = first; 5512 rlp->rlck_end = end; 5513 rlp->rlck_type = oldltype; 5514 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 5515 } 5516 5517out: 5518 NFSEXITCODE(error); 5519 return (error); 5520} 5521 5522/* 5523 * Roll back local lock changes and free up the rollback list. 5524 */ 5525static void 5526nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 5527{ 5528 struct nfsrollback *rlp, *nrlp; 5529 5530 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 5531 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 5532 rlp->rlck_end, p); 5533 free(rlp, M_NFSDROLLBACK); 5534 } 5535 LIST_INIT(&lfp->lf_rollback); 5536} 5537 5538/* 5539 * Update local lock list and delete rollback list (ie now committed to the 5540 * local locks). Most of the work is done by the internal function. 5541 */ 5542static void 5543nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 5544 uint64_t end) 5545{ 5546 struct nfsrollback *rlp, *nrlp; 5547 struct nfslock *new_lop, *other_lop; 5548 5549 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 5550 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 5551 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 5552 M_WAITOK); 5553 else 5554 other_lop = NULL; 5555 new_lop->lo_flags = flags; 5556 new_lop->lo_first = first; 5557 new_lop->lo_end = end; 5558 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 5559 if (new_lop != NULL) 5560 free(new_lop, M_NFSDLOCK); 5561 if (other_lop != NULL) 5562 free(other_lop, M_NFSDLOCK); 5563 5564 /* and get rid of the rollback list */ 5565 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 5566 free(rlp, M_NFSDROLLBACK); 5567 LIST_INIT(&lfp->lf_rollback); 5568} 5569 5570/* 5571 * Lock the struct nfslockfile for local lock updating. 5572 */ 5573static void 5574nfsrv_locklf(struct nfslockfile *lfp) 5575{ 5576 int gotlock; 5577 5578 /* lf_usecount ensures *lfp won't be free'd */ 5579 lfp->lf_usecount++; 5580 do { 5581 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 5582 NFSSTATEMUTEXPTR, NULL); 5583 } while (gotlock == 0); 5584 lfp->lf_usecount--; 5585} 5586 5587/* 5588 * Unlock the struct nfslockfile after local lock updating. 5589 */ 5590static void 5591nfsrv_unlocklf(struct nfslockfile *lfp) 5592{ 5593 5594 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 5595} 5596 5597/* 5598 * Clear out all state for the NFSv4 server. 5599 * Must be called by a thread that can sleep when no nfsds are running. 5600 */ 5601void 5602nfsrv_throwawayallstate(NFSPROC_T *p) 5603{ 5604 struct nfsclient *clp, *nclp; 5605 struct nfslockfile *lfp, *nlfp; 5606 int i; 5607 5608 /* 5609 * For each client, clean out the state and then free the structure. 5610 */ 5611 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 5612 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5613 nfsrv_cleanclient(clp, p); 5614 nfsrv_freedeleglist(&clp->lc_deleg); 5615 nfsrv_freedeleglist(&clp->lc_olddeleg); 5616 free(clp, M_NFSDCLIENT); 5617 } 5618 } 5619 5620 /* 5621 * Also, free up any remaining lock file structures. 5622 */ 5623 for (i = 0; i < NFSLOCKHASHSIZE; i++) { 5624 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) { 5625 printf("nfsd unload: fnd a lock file struct\n"); 5626 nfsrv_freenfslockfile(lfp); 5627 } 5628 } 5629} 5630 5631/* 5632 * Check the sequence# for the session and slot provided as an argument. 5633 * Also, renew the lease if the session will return NFS_OK. 5634 */ 5635int 5636nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 5637 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 5638 uint32_t *sflagsp, NFSPROC_T *p) 5639{ 5640 struct nfsdsession *sep; 5641 struct nfssessionhash *shp; 5642 int error; 5643 SVCXPRT *savxprt; 5644 5645 shp = NFSSESSIONHASH(nd->nd_sessionid); 5646 NFSLOCKSESSION(shp); 5647 sep = nfsrv_findsession(nd->nd_sessionid); 5648 if (sep == NULL) { 5649 NFSUNLOCKSESSION(shp); 5650 return (NFSERR_BADSESSION); 5651 } 5652 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 5653 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 5654 if (error != 0) { 5655 NFSUNLOCKSESSION(shp); 5656 return (error); 5657 } 5658 if (cache_this != 0) 5659 nd->nd_flag |= ND_SAVEREPLY; 5660 /* Renew the lease. */ 5661 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 5662 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 5663 nd->nd_flag |= ND_IMPLIEDCLID; 5664 5665 /* 5666 * If this session handles the backchannel, save the nd_xprt for this 5667 * RPC, since this is the one being used. 5668 */ 5669 if (sep->sess_cbsess.nfsess_xprt != NULL && 5670 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) { 5671 savxprt = sep->sess_cbsess.nfsess_xprt; 5672 SVC_ACQUIRE(nd->nd_xprt); 5673 nd->nd_xprt->xp_p2 = savxprt->xp_p2; 5674 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */ 5675 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 5676 SVC_RELEASE(savxprt); 5677 } 5678 5679 *sflagsp = 0; 5680 if (sep->sess_clp->lc_req.nr_client == NULL) 5681 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 5682 NFSUNLOCKSESSION(shp); 5683 if (error == NFSERR_EXPIRED) { 5684 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 5685 error = 0; 5686 } else if (error == NFSERR_ADMINREVOKED) { 5687 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 5688 error = 0; 5689 } 5690 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 5691 return (0); 5692} 5693 5694/* 5695 * Check/set reclaim complete for this session/clientid. 5696 */ 5697int 5698nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd) 5699{ 5700 struct nfsdsession *sep; 5701 struct nfssessionhash *shp; 5702 int error = 0; 5703 5704 shp = NFSSESSIONHASH(nd->nd_sessionid); 5705 NFSLOCKSTATE(); 5706 NFSLOCKSESSION(shp); 5707 sep = nfsrv_findsession(nd->nd_sessionid); 5708 if (sep == NULL) { 5709 NFSUNLOCKSESSION(shp); 5710 NFSUNLOCKSTATE(); 5711 return (NFSERR_BADSESSION); 5712 } 5713 5714 /* Check to see if reclaim complete has already happened. */ 5715 if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 5716 error = NFSERR_COMPLETEALREADY; 5717 else 5718 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 5719 NFSUNLOCKSESSION(shp); 5720 NFSUNLOCKSTATE(); 5721 return (error); 5722} 5723 5724/* 5725 * Cache the reply in a session slot. 5726 */ 5727void 5728nfsrv_cache_session(uint8_t *sessionid, uint32_t slotid, int repstat, 5729 struct mbuf **m) 5730{ 5731 struct nfsdsession *sep; 5732 struct nfssessionhash *shp; 5733 5734 shp = NFSSESSIONHASH(sessionid); 5735 NFSLOCKSESSION(shp); 5736 sep = nfsrv_findsession(sessionid); 5737 if (sep == NULL) { 5738 NFSUNLOCKSESSION(shp); 5739 printf("nfsrv_cache_session: no session\n"); 5740 m_freem(*m); 5741 return; 5742 } 5743 nfsv4_seqsess_cacherep(slotid, sep->sess_slots, repstat, m); 5744 NFSUNLOCKSESSION(shp); 5745} 5746 5747/* 5748 * Search for a session that matches the sessionid. 5749 */ 5750static struct nfsdsession * 5751nfsrv_findsession(uint8_t *sessionid) 5752{ 5753 struct nfsdsession *sep; 5754 struct nfssessionhash *shp; 5755 5756 shp = NFSSESSIONHASH(sessionid); 5757 LIST_FOREACH(sep, &shp->list, sess_hash) { 5758 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 5759 break; 5760 } 5761 return (sep); 5762} 5763 5764/* 5765 * Destroy a session. 5766 */ 5767int 5768nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 5769{ 5770 int error, samesess; 5771 5772 samesess = 0; 5773 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID)) { 5774 samesess = 1; 5775 if ((nd->nd_flag & ND_LASTOP) == 0) 5776 return (NFSERR_BADSESSION); 5777 } 5778 error = nfsrv_freesession(NULL, sessionid); 5779 if (error == 0 && samesess != 0) 5780 nd->nd_flag &= ~ND_HASSEQUENCE; 5781 return (error); 5782} 5783 5784/* 5785 * Free up a session structure. 5786 */ 5787static int 5788nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid) 5789{ 5790 struct nfssessionhash *shp; 5791 int i; 5792 5793 if (sep == NULL) { 5794 shp = NFSSESSIONHASH(sessionid); 5795 NFSLOCKSESSION(shp); 5796 sep = nfsrv_findsession(sessionid); 5797 } else { 5798 shp = NFSSESSIONHASH(sep->sess_sessionid); 5799 NFSLOCKSESSION(shp); 5800 } 5801 if (sep != NULL) { 5802 NFSLOCKSTATE(); 5803 sep->sess_refcnt--; 5804 if (sep->sess_refcnt > 0) { 5805 NFSUNLOCKSTATE(); 5806 NFSUNLOCKSESSION(shp); 5807 return (0); 5808 } 5809 LIST_REMOVE(sep, sess_hash); 5810 LIST_REMOVE(sep, sess_list); 5811 NFSUNLOCKSTATE(); 5812 } 5813 NFSUNLOCKSESSION(shp); 5814 if (sep == NULL) 5815 return (NFSERR_BADSESSION); 5816 for (i = 0; i < NFSV4_SLOTS; i++) 5817 if (sep->sess_slots[i].nfssl_reply != NULL) 5818 m_freem(sep->sess_slots[i].nfssl_reply); 5819 if (sep->sess_cbsess.nfsess_xprt != NULL) 5820 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 5821 free(sep, M_NFSDSESSION); 5822 return (0); 5823} 5824 5825/* 5826 * Free a stateid. 5827 * RFC5661 says that it should fail when there are associated opens, locks 5828 * or delegations. Since stateids represent opens, I don't see how you can 5829 * free an open stateid (it will be free'd when closed), so this function 5830 * only works for lock stateids (freeing the lock_owner) or delegations. 5831 */ 5832int 5833nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 5834 NFSPROC_T *p) 5835{ 5836 struct nfsclient *clp; 5837 struct nfsstate *stp; 5838 int error; 5839 5840 NFSLOCKSTATE(); 5841 /* 5842 * Look up the stateid 5843 */ 5844 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 5845 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 5846 if (error == 0) { 5847 /* First, check for a delegation. */ 5848 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 5849 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 5850 NFSX_STATEIDOTHER)) 5851 break; 5852 } 5853 if (stp != NULL) { 5854 nfsrv_freedeleg(stp); 5855 NFSUNLOCKSTATE(); 5856 return (error); 5857 } 5858 } 5859 /* Not a delegation, try for a lock_owner. */ 5860 if (error == 0) 5861 error = nfsrv_getstate(clp, stateidp, 0, &stp); 5862 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 5863 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 5864 /* Not a lock_owner stateid. */ 5865 error = NFSERR_LOCKSHELD; 5866 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 5867 error = NFSERR_LOCKSHELD; 5868 if (error == 0) 5869 nfsrv_freelockowner(stp, NULL, 0, p); 5870 NFSUNLOCKSTATE(); 5871 return (error); 5872} 5873 5874/* 5875 * Generate the xdr for an NFSv4.1 CBSequence Operation. 5876 */ 5877static int 5878nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 5879 int dont_replycache, struct nfsdsession **sepp) 5880{ 5881 struct nfsdsession *sep; 5882 uint32_t *tl, slotseq = 0; 5883 int maxslot, slotpos; 5884 uint8_t sessionid[NFSX_V4SESSIONID]; 5885 int error; 5886 5887 error = nfsv4_getcbsession(clp, sepp); 5888 if (error != 0) 5889 return (error); 5890 sep = *sepp; 5891 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot, 5892 &slotseq, sessionid); 5893 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 5894 5895 /* Build the Sequence arguments. */ 5896 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 5897 bcopy(sessionid, tl, NFSX_V4SESSIONID); 5898 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 5899 nd->nd_slotseq = tl; 5900 *tl++ = txdr_unsigned(slotseq); 5901 *tl++ = txdr_unsigned(slotpos); 5902 *tl++ = txdr_unsigned(maxslot); 5903 if (dont_replycache == 0) 5904 *tl++ = newnfs_true; 5905 else 5906 *tl++ = newnfs_false; 5907 *tl = 0; /* No referring call list, for now. */ 5908 nd->nd_flag |= ND_HASSEQUENCE; 5909 return (0); 5910} 5911 5912/* 5913 * Get a session for the callback. 5914 */ 5915static int 5916nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 5917{ 5918 struct nfsdsession *sep; 5919 5920 NFSLOCKSTATE(); 5921 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 5922 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 5923 break; 5924 } 5925 if (sep == NULL) { 5926 NFSUNLOCKSTATE(); 5927 return (NFSERR_BADSESSION); 5928 } 5929 sep->sess_refcnt++; 5930 *sepp = sep; 5931 NFSUNLOCKSTATE(); 5932 return (0); 5933} 5934 5935