nfs_nfsdstate.c revision 1.1.1.1
1 /* $NetBSD: nfs_nfsdstate.c,v 1.1.1.1 2013/09/30 07:19:52 dholland Exp $ */ 2 /*- 3 * Copyright (c) 2009 Rick Macklem, University of Guelph 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 /* __FBSDID("FreeBSD: head/sys/fs/nfsserver/nfs_nfsdstate.c 245909 2013-01-25 15:25:24Z jhb "); */ 31 __RCSID("$NetBSD: nfs_nfsdstate.c,v 1.1.1.1 2013/09/30 07:19:52 dholland Exp $"); 32 33 #ifndef APPLEKEXT 34 #include <fs/nfs/nfsport.h> 35 36 struct nfsrv_stablefirst nfsrv_stablefirst; 37 int nfsrv_issuedelegs = 0; 38 int nfsrv_dolocallocks = 0; 39 struct nfsv4lock nfsv4rootfs_lock; 40 41 extern int newnfs_numnfsd; 42 extern struct nfsstats newnfsstats; 43 extern int nfsrv_lease; 44 extern struct timeval nfsboottime; 45 extern u_int32_t newnfs_true, newnfs_false; 46 NFSV4ROOTLOCKMUTEX; 47 NFSSTATESPINLOCK; 48 49 /* 50 * Hash lists for nfs V4. 51 * (Some would put them in the .h file, but I don't like declaring storage 52 * in a .h) 53 */ 54 struct nfsclienthashhead nfsclienthash[NFSCLIENTHASHSIZE]; 55 struct nfslockhashhead nfslockhash[NFSLOCKHASHSIZE]; 56 #endif /* !APPLEKEXT */ 57 58 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 59 static time_t nfsrvboottime; 60 static int nfsrv_writedelegifpos = 1; 61 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 62 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 63 static int nfsrv_nogsscallback = 0; 64 65 /* local functions */ 66 static void nfsrv_dumpaclient(struct nfsclient *clp, 67 struct nfsd_dumpclients *dumpp); 68 static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 69 NFSPROC_T *p); 70 static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 71 NFSPROC_T *p); 72 static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 73 NFSPROC_T *p); 74 static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 75 int cansleep, NFSPROC_T *p); 76 static void nfsrv_freenfslock(struct nfslock *lop); 77 static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 78 static void nfsrv_freedeleg(struct nfsstate *); 79 static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 80 u_int32_t flags, struct nfsstate **stpp); 81 static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 82 struct nfsstate **stpp); 83 static int nfsrv_getlockfh(vnode_t vp, u_short flags, 84 struct nfslockfile **new_lfpp, fhandle_t *nfhp, NFSPROC_T *p); 85 static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 86 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 87 static void nfsrv_insertlock(struct nfslock *new_lop, 88 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 89 static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 90 struct nfslock **other_lopp, struct nfslockfile *lfp); 91 static int nfsrv_getipnumber(u_char *cp); 92 static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 93 nfsv4stateid_t *stateidp, int specialid); 94 static int nfsrv_checkgrace(u_int32_t flags); 95 static 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); 98 static u_int32_t nfsrv_nextclientindex(void); 99 static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 100 static void nfsrv_markstable(struct nfsclient *clp); 101 static int nfsrv_checkstable(struct nfsclient *clp); 102 static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 103 vnode *vp, NFSPROC_T *p); 104 static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 105 NFSPROC_T *p, vnode_t vp); 106 static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 107 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 108 static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 109 struct nfsclient *clp); 110 static time_t nfsrv_leaseexpiry(void); 111 static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 112 static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 113 struct nfsstate *stp, struct nfsrvcache *op); 114 static int nfsrv_nootherstate(struct nfsstate *stp); 115 static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 116 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 117 static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 118 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 119 static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 120 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 121 NFSPROC_T *p); 122 static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 123 NFSPROC_T *p); 124 static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 125 uint64_t first, uint64_t end); 126 static void nfsrv_locklf(struct nfslockfile *lfp); 127 static void nfsrv_unlocklf(struct nfslockfile *lfp); 128 129 /* 130 * Scan the client list for a match and either return the current one, 131 * create a new entry or return an error. 132 * If returning a non-error, the clp structure must either be linked into 133 * the client list or free'd. 134 */ 135 APPLESTATIC int 136 nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 137 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 138 { 139 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 140 int i, error = 0; 141 struct nfsstate *stp, *tstp; 142 struct sockaddr_in *sad, *rad; 143 int zapit = 0, gotit, hasstate = 0, igotlock; 144 static u_int64_t confirm_index = 0; 145 146 /* 147 * Check for state resource limit exceeded. 148 */ 149 if (nfsrv_openpluslock > NFSRV_V4STATELIMIT) { 150 error = NFSERR_RESOURCE; 151 goto out; 152 } 153 154 if (nfsrv_issuedelegs == 0 || 155 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 156 /* 157 * Don't do callbacks when delegations are disabled or 158 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 159 * If establishing a callback connection is attempted 160 * when a firewall is blocking the callback path, the 161 * server may wait too long for the connect attempt to 162 * succeed during the Open. Some clients, such as Linux, 163 * may timeout and give up on the Open before the server 164 * replies. Also, since AUTH_GSS callbacks are not 165 * yet interoperability tested, they might cause the 166 * server to crap out, if they get past the Init call to 167 * the client. 168 */ 169 new_clp->lc_program = 0; 170 171 /* Lock out other nfsd threads */ 172 NFSLOCKV4ROOTMUTEX(); 173 nfsv4_relref(&nfsv4rootfs_lock); 174 do { 175 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 176 NFSV4ROOTLOCKMUTEXPTR, NULL); 177 } while (!igotlock); 178 NFSUNLOCKV4ROOTMUTEX(); 179 180 /* 181 * Search for a match in the client list. 182 */ 183 gotit = i = 0; 184 while (i < NFSCLIENTHASHSIZE && !gotit) { 185 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 186 if (new_clp->lc_idlen == clp->lc_idlen && 187 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 188 gotit = 1; 189 break; 190 } 191 } 192 i++; 193 } 194 if (!gotit || 195 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 196 /* 197 * Get rid of the old one. 198 */ 199 if (i != NFSCLIENTHASHSIZE) { 200 LIST_REMOVE(clp, lc_hash); 201 nfsrv_cleanclient(clp, p); 202 nfsrv_freedeleglist(&clp->lc_deleg); 203 nfsrv_freedeleglist(&clp->lc_olddeleg); 204 zapit = 1; 205 } 206 /* 207 * Add it after assigning a client id to it. 208 */ 209 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 210 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 211 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 212 (u_int32_t)nfsrvboottime; 213 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 214 nfsrv_nextclientindex(); 215 new_clp->lc_stateindex = 0; 216 new_clp->lc_statemaxindex = 0; 217 new_clp->lc_cbref = 0; 218 new_clp->lc_expiry = nfsrv_leaseexpiry(); 219 LIST_INIT(&new_clp->lc_open); 220 LIST_INIT(&new_clp->lc_deleg); 221 LIST_INIT(&new_clp->lc_olddeleg); 222 for (i = 0; i < NFSSTATEHASHSIZE; i++) 223 LIST_INIT(&new_clp->lc_stateid[i]); 224 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 225 lc_hash); 226 newnfsstats.srvclients++; 227 nfsrv_openpluslock++; 228 nfsrv_clients++; 229 NFSLOCKV4ROOTMUTEX(); 230 nfsv4_unlock(&nfsv4rootfs_lock, 1); 231 NFSUNLOCKV4ROOTMUTEX(); 232 if (zapit) 233 nfsrv_zapclient(clp, p); 234 *new_clpp = NULL; 235 goto out; 236 } 237 238 /* 239 * Now, handle the cases where the id is already issued. 240 */ 241 if (nfsrv_notsamecredname(nd, clp)) { 242 /* 243 * Check to see if there is expired state that should go away. 244 */ 245 if (clp->lc_expiry < NFSD_MONOSEC && 246 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 247 nfsrv_cleanclient(clp, p); 248 nfsrv_freedeleglist(&clp->lc_deleg); 249 } 250 251 /* 252 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 253 * RFC3530 Sec. 8.1.2 last para. 254 */ 255 if (!LIST_EMPTY(&clp->lc_deleg)) { 256 hasstate = 1; 257 } else if (LIST_EMPTY(&clp->lc_open)) { 258 hasstate = 0; 259 } else { 260 hasstate = 0; 261 /* Look for an Open on the OpenOwner */ 262 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 263 if (!LIST_EMPTY(&stp->ls_open)) { 264 hasstate = 1; 265 break; 266 } 267 } 268 } 269 if (hasstate) { 270 /* 271 * If the uid doesn't match, return NFSERR_CLIDINUSE after 272 * filling out the correct ipaddr and portnum. 273 */ 274 sad = NFSSOCKADDR(new_clp->lc_req.nr_nam, struct sockaddr_in *); 275 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 276 sad->sin_addr.s_addr = rad->sin_addr.s_addr; 277 sad->sin_port = rad->sin_port; 278 NFSLOCKV4ROOTMUTEX(); 279 nfsv4_unlock(&nfsv4rootfs_lock, 1); 280 NFSUNLOCKV4ROOTMUTEX(); 281 error = NFSERR_CLIDINUSE; 282 goto out; 283 } 284 } 285 286 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 287 /* 288 * If the verifier has changed, the client has rebooted 289 * and a new client id is issued. The old state info 290 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 291 */ 292 LIST_REMOVE(clp, lc_hash); 293 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 294 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 295 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 296 nfsrvboottime; 297 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 298 nfsrv_nextclientindex(); 299 new_clp->lc_stateindex = 0; 300 new_clp->lc_statemaxindex = 0; 301 new_clp->lc_cbref = 0; 302 new_clp->lc_expiry = nfsrv_leaseexpiry(); 303 304 /* 305 * Save the state until confirmed. 306 */ 307 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 308 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 309 tstp->ls_clp = new_clp; 310 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 311 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 312 tstp->ls_clp = new_clp; 313 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 314 ls_list); 315 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 316 tstp->ls_clp = new_clp; 317 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 318 LIST_NEWHEAD(&new_clp->lc_stateid[i], 319 &clp->lc_stateid[i], ls_hash); 320 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 321 tstp->ls_clp = new_clp; 322 } 323 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 324 lc_hash); 325 newnfsstats.srvclients++; 326 nfsrv_openpluslock++; 327 nfsrv_clients++; 328 NFSLOCKV4ROOTMUTEX(); 329 nfsv4_unlock(&nfsv4rootfs_lock, 1); 330 NFSUNLOCKV4ROOTMUTEX(); 331 332 /* 333 * Must wait until any outstanding callback on the old clp 334 * completes. 335 */ 336 NFSLOCKSTATE(); 337 while (clp->lc_cbref) { 338 clp->lc_flags |= LCL_WAKEUPWANTED; 339 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 340 "nfsd clp", 10 * hz); 341 } 342 NFSUNLOCKSTATE(); 343 nfsrv_zapclient(clp, p); 344 *new_clpp = NULL; 345 goto out; 346 } 347 /* 348 * id and verifier match, so update the net address info 349 * and get rid of any existing callback authentication 350 * handle, so a new one will be acquired. 351 */ 352 LIST_REMOVE(clp, lc_hash); 353 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 354 new_clp->lc_expiry = nfsrv_leaseexpiry(); 355 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 356 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 357 clp->lc_clientid.lval[0]; 358 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 359 clp->lc_clientid.lval[1]; 360 new_clp->lc_delegtime = clp->lc_delegtime; 361 new_clp->lc_stateindex = clp->lc_stateindex; 362 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 363 new_clp->lc_cbref = 0; 364 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 365 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 366 tstp->ls_clp = new_clp; 367 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 368 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 369 tstp->ls_clp = new_clp; 370 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 371 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 372 tstp->ls_clp = new_clp; 373 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 374 LIST_NEWHEAD(&new_clp->lc_stateid[i], &clp->lc_stateid[i], 375 ls_hash); 376 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 377 tstp->ls_clp = new_clp; 378 } 379 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 380 lc_hash); 381 newnfsstats.srvclients++; 382 nfsrv_openpluslock++; 383 nfsrv_clients++; 384 NFSLOCKV4ROOTMUTEX(); 385 nfsv4_unlock(&nfsv4rootfs_lock, 1); 386 NFSUNLOCKV4ROOTMUTEX(); 387 388 /* 389 * Must wait until any outstanding callback on the old clp 390 * completes. 391 */ 392 NFSLOCKSTATE(); 393 while (clp->lc_cbref) { 394 clp->lc_flags |= LCL_WAKEUPWANTED; 395 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, "nfsd clp", 396 10 * hz); 397 } 398 NFSUNLOCKSTATE(); 399 nfsrv_zapclient(clp, p); 400 *new_clpp = NULL; 401 402 out: 403 NFSEXITCODE2(error, nd); 404 return (error); 405 } 406 407 /* 408 * Check to see if the client id exists and optionally confirm it. 409 */ 410 APPLESTATIC int 411 nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 412 nfsquad_t confirm, struct nfsrv_descript *nd, NFSPROC_T *p) 413 { 414 struct nfsclient *clp; 415 struct nfsstate *stp; 416 int i; 417 struct nfsclienthashhead *hp; 418 int error = 0, igotlock, doneok; 419 420 if (clpp) 421 *clpp = NULL; 422 if (nfsrvboottime != clientid.lval[0]) { 423 error = NFSERR_STALECLIENTID; 424 goto out; 425 } 426 427 /* 428 * If called with opflags == CLOPS_RENEW, the State Lock is 429 * already held. Otherwise, we need to get either that or, 430 * for the case of Confirm, lock out the nfsd threads. 431 */ 432 if (opflags & CLOPS_CONFIRM) { 433 NFSLOCKV4ROOTMUTEX(); 434 nfsv4_relref(&nfsv4rootfs_lock); 435 do { 436 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 437 NFSV4ROOTLOCKMUTEXPTR, NULL); 438 } while (!igotlock); 439 NFSUNLOCKV4ROOTMUTEX(); 440 } else if (opflags != CLOPS_RENEW) { 441 NFSLOCKSTATE(); 442 } 443 444 hp = NFSCLIENTHASH(clientid); 445 LIST_FOREACH(clp, hp, lc_hash) { 446 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 447 break; 448 } 449 if (clp == LIST_END(hp)) { 450 if (opflags & CLOPS_CONFIRM) 451 error = NFSERR_STALECLIENTID; 452 else 453 error = NFSERR_EXPIRED; 454 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 455 /* 456 * If marked admin revoked, just return the error. 457 */ 458 error = NFSERR_ADMINREVOKED; 459 } 460 if (error) { 461 if (opflags & CLOPS_CONFIRM) { 462 NFSLOCKV4ROOTMUTEX(); 463 nfsv4_unlock(&nfsv4rootfs_lock, 1); 464 NFSUNLOCKV4ROOTMUTEX(); 465 } else if (opflags != CLOPS_RENEW) { 466 NFSUNLOCKSTATE(); 467 } 468 goto out; 469 } 470 471 /* 472 * Perform any operations specified by the opflags. 473 */ 474 if (opflags & CLOPS_CONFIRM) { 475 if (clp->lc_confirm.qval != confirm.qval) 476 error = NFSERR_STALECLIENTID; 477 else if (nfsrv_notsamecredname(nd, clp)) 478 error = NFSERR_CLIDINUSE; 479 480 if (!error) { 481 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 482 LCL_NEEDSCONFIRM) { 483 /* 484 * Hang onto the delegations (as old delegations) 485 * for an Open with CLAIM_DELEGATE_PREV unless in 486 * grace, but get rid of the rest of the state. 487 */ 488 nfsrv_cleanclient(clp, p); 489 nfsrv_freedeleglist(&clp->lc_olddeleg); 490 if (nfsrv_checkgrace(0)) { 491 /* In grace, so just delete delegations */ 492 nfsrv_freedeleglist(&clp->lc_deleg); 493 } else { 494 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 495 stp->ls_flags |= NFSLCK_OLDDELEG; 496 clp->lc_delegtime = NFSD_MONOSEC + 497 nfsrv_lease + NFSRV_LEASEDELTA; 498 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 499 ls_list); 500 } 501 } 502 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 503 if (clp->lc_program) 504 clp->lc_flags |= LCL_NEEDSCBNULL; 505 } 506 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 507 error = NFSERR_EXPIRED; 508 } 509 510 /* 511 * If called by the Renew Op, we must check the principal. 512 */ 513 if (!error && (opflags & CLOPS_RENEWOP)) { 514 if (nfsrv_notsamecredname(nd, clp)) { 515 doneok = 0; 516 for (i = 0; i < NFSSTATEHASHSIZE && doneok == 0; i++) { 517 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 518 if ((stp->ls_flags & NFSLCK_OPEN) && 519 stp->ls_uid == nd->nd_cred->cr_uid) { 520 doneok = 1; 521 break; 522 } 523 } 524 } 525 if (!doneok) 526 error = NFSERR_ACCES; 527 } 528 if (!error && (clp->lc_flags & LCL_CBDOWN)) 529 error = NFSERR_CBPATHDOWN; 530 } 531 if ((!error || error == NFSERR_CBPATHDOWN) && 532 (opflags & CLOPS_RENEW)) { 533 clp->lc_expiry = nfsrv_leaseexpiry(); 534 } 535 if (opflags & CLOPS_CONFIRM) { 536 NFSLOCKV4ROOTMUTEX(); 537 nfsv4_unlock(&nfsv4rootfs_lock, 1); 538 NFSUNLOCKV4ROOTMUTEX(); 539 } else if (opflags != CLOPS_RENEW) { 540 NFSUNLOCKSTATE(); 541 } 542 if (clpp) 543 *clpp = clp; 544 545 out: 546 NFSEXITCODE2(error, nd); 547 return (error); 548 } 549 550 /* 551 * Called from the new nfssvc syscall to admin revoke a clientid. 552 * Returns 0 for success, error otherwise. 553 */ 554 APPLESTATIC int 555 nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 556 { 557 struct nfsclient *clp = NULL; 558 int i, error = 0; 559 int gotit, igotlock; 560 561 /* 562 * First, lock out the nfsd so that state won't change while the 563 * revocation record is being written to the stable storage restart 564 * file. 565 */ 566 NFSLOCKV4ROOTMUTEX(); 567 do { 568 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 569 NFSV4ROOTLOCKMUTEXPTR, NULL); 570 } while (!igotlock); 571 NFSUNLOCKV4ROOTMUTEX(); 572 573 /* 574 * Search for a match in the client list. 575 */ 576 gotit = i = 0; 577 while (i < NFSCLIENTHASHSIZE && !gotit) { 578 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 579 if (revokep->nclid_idlen == clp->lc_idlen && 580 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 581 gotit = 1; 582 break; 583 } 584 } 585 i++; 586 } 587 if (!gotit) { 588 NFSLOCKV4ROOTMUTEX(); 589 nfsv4_unlock(&nfsv4rootfs_lock, 0); 590 NFSUNLOCKV4ROOTMUTEX(); 591 error = EPERM; 592 goto out; 593 } 594 595 /* 596 * Now, write out the revocation record 597 */ 598 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 599 nfsrv_backupstable(); 600 601 /* 602 * and clear out the state, marking the clientid revoked. 603 */ 604 clp->lc_flags &= ~LCL_CALLBACKSON; 605 clp->lc_flags |= LCL_ADMINREVOKED; 606 nfsrv_cleanclient(clp, p); 607 nfsrv_freedeleglist(&clp->lc_deleg); 608 nfsrv_freedeleglist(&clp->lc_olddeleg); 609 NFSLOCKV4ROOTMUTEX(); 610 nfsv4_unlock(&nfsv4rootfs_lock, 0); 611 NFSUNLOCKV4ROOTMUTEX(); 612 613 out: 614 NFSEXITCODE(error); 615 return (error); 616 } 617 618 /* 619 * Dump out stats for all clients. Called from nfssvc(2), that is used 620 * newnfsstats. 621 */ 622 APPLESTATIC void 623 nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 624 { 625 struct nfsclient *clp; 626 int i = 0, cnt = 0; 627 628 /* 629 * First, get a reference on the nfsv4rootfs_lock so that an 630 * exclusive lock cannot be acquired while dumping the clients. 631 */ 632 NFSLOCKV4ROOTMUTEX(); 633 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 634 NFSUNLOCKV4ROOTMUTEX(); 635 NFSLOCKSTATE(); 636 /* 637 * Rattle through the client lists until done. 638 */ 639 while (i < NFSCLIENTHASHSIZE && cnt < maxcnt) { 640 clp = LIST_FIRST(&nfsclienthash[i]); 641 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 642 nfsrv_dumpaclient(clp, &dumpp[cnt]); 643 cnt++; 644 clp = LIST_NEXT(clp, lc_hash); 645 } 646 i++; 647 } 648 if (cnt < maxcnt) 649 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 650 NFSUNLOCKSTATE(); 651 NFSLOCKV4ROOTMUTEX(); 652 nfsv4_relref(&nfsv4rootfs_lock); 653 NFSUNLOCKV4ROOTMUTEX(); 654 } 655 656 /* 657 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 658 */ 659 static void 660 nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 661 { 662 struct nfsstate *stp, *openstp, *lckownstp; 663 struct nfslock *lop; 664 struct sockaddr *sad; 665 struct sockaddr_in *rad; 666 struct sockaddr_in6 *rad6; 667 668 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 669 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 670 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 671 dumpp->ndcl_flags = clp->lc_flags; 672 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 673 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 674 sad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr *); 675 dumpp->ndcl_addrfam = sad->sa_family; 676 if (sad->sa_family == AF_INET) { 677 rad = (struct sockaddr_in *)sad; 678 dumpp->ndcl_cbaddr.sin_addr = rad->sin_addr; 679 } else { 680 rad6 = (struct sockaddr_in6 *)sad; 681 dumpp->ndcl_cbaddr.sin6_addr = rad6->sin6_addr; 682 } 683 684 /* 685 * Now, scan the state lists and total up the opens and locks. 686 */ 687 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 688 dumpp->ndcl_nopenowners++; 689 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 690 dumpp->ndcl_nopens++; 691 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 692 dumpp->ndcl_nlockowners++; 693 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 694 dumpp->ndcl_nlocks++; 695 } 696 } 697 } 698 } 699 700 /* 701 * and the delegation lists. 702 */ 703 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 704 dumpp->ndcl_ndelegs++; 705 } 706 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 707 dumpp->ndcl_nolddelegs++; 708 } 709 } 710 711 /* 712 * Dump out lock stats for a file. 713 */ 714 APPLESTATIC void 715 nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 716 NFSPROC_T *p) 717 { 718 struct nfsstate *stp; 719 struct nfslock *lop; 720 int cnt = 0; 721 struct nfslockfile *lfp; 722 struct sockaddr *sad; 723 struct sockaddr_in *rad; 724 struct sockaddr_in6 *rad6; 725 int ret; 726 fhandle_t nfh; 727 728 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 729 /* 730 * First, get a reference on the nfsv4rootfs_lock so that an 731 * exclusive lock on it cannot be acquired while dumping the locks. 732 */ 733 NFSLOCKV4ROOTMUTEX(); 734 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 735 NFSUNLOCKV4ROOTMUTEX(); 736 NFSLOCKSTATE(); 737 if (!ret) 738 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 739 if (ret) { 740 ldumpp[0].ndlck_clid.nclid_idlen = 0; 741 NFSUNLOCKSTATE(); 742 NFSLOCKV4ROOTMUTEX(); 743 nfsv4_relref(&nfsv4rootfs_lock); 744 NFSUNLOCKV4ROOTMUTEX(); 745 return; 746 } 747 748 /* 749 * For each open share on file, dump it out. 750 */ 751 stp = LIST_FIRST(&lfp->lf_open); 752 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 753 ldumpp[cnt].ndlck_flags = stp->ls_flags; 754 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 755 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 756 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 757 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 758 ldumpp[cnt].ndlck_owner.nclid_idlen = 759 stp->ls_openowner->ls_ownerlen; 760 NFSBCOPY(stp->ls_openowner->ls_owner, 761 ldumpp[cnt].ndlck_owner.nclid_id, 762 stp->ls_openowner->ls_ownerlen); 763 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 764 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 765 stp->ls_clp->lc_idlen); 766 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 767 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 768 if (sad->sa_family == AF_INET) { 769 rad = (struct sockaddr_in *)sad; 770 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 771 } else { 772 rad6 = (struct sockaddr_in6 *)sad; 773 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 774 } 775 stp = LIST_NEXT(stp, ls_file); 776 cnt++; 777 } 778 779 /* 780 * and all locks. 781 */ 782 lop = LIST_FIRST(&lfp->lf_lock); 783 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 784 stp = lop->lo_stp; 785 ldumpp[cnt].ndlck_flags = lop->lo_flags; 786 ldumpp[cnt].ndlck_first = lop->lo_first; 787 ldumpp[cnt].ndlck_end = lop->lo_end; 788 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 789 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 790 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 791 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 792 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 793 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 794 stp->ls_ownerlen); 795 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 796 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 797 stp->ls_clp->lc_idlen); 798 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 799 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 800 if (sad->sa_family == AF_INET) { 801 rad = (struct sockaddr_in *)sad; 802 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 803 } else { 804 rad6 = (struct sockaddr_in6 *)sad; 805 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 806 } 807 lop = LIST_NEXT(lop, lo_lckfile); 808 cnt++; 809 } 810 811 /* 812 * and the delegations. 813 */ 814 stp = LIST_FIRST(&lfp->lf_deleg); 815 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 816 ldumpp[cnt].ndlck_flags = stp->ls_flags; 817 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 818 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 819 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 820 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 821 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 822 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 823 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 824 stp->ls_clp->lc_idlen); 825 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 826 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 827 if (sad->sa_family == AF_INET) { 828 rad = (struct sockaddr_in *)sad; 829 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 830 } else { 831 rad6 = (struct sockaddr_in6 *)sad; 832 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 833 } 834 stp = LIST_NEXT(stp, ls_file); 835 cnt++; 836 } 837 838 /* 839 * If list isn't full, mark end of list by setting the client name 840 * to zero length. 841 */ 842 if (cnt < maxcnt) 843 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 844 NFSUNLOCKSTATE(); 845 NFSLOCKV4ROOTMUTEX(); 846 nfsv4_relref(&nfsv4rootfs_lock); 847 NFSUNLOCKV4ROOTMUTEX(); 848 } 849 850 /* 851 * Server timer routine. It can scan any linked list, so long 852 * as it holds the spin/mutex lock and there is no exclusive lock on 853 * nfsv4rootfs_lock. 854 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 855 * to do this from a callout, since the spin locks work. For 856 * Darwin, I'm not sure what will work correctly yet.) 857 * Should be called once per second. 858 */ 859 APPLESTATIC void 860 nfsrv_servertimer(void) 861 { 862 struct nfsclient *clp, *nclp; 863 struct nfsstate *stp, *nstp; 864 int got_ref, i; 865 866 /* 867 * Make sure nfsboottime is set. This is used by V3 as well 868 * as V4. Note that nfsboottime is not nfsrvboottime, which is 869 * only used by the V4 server for leases. 870 */ 871 if (nfsboottime.tv_sec == 0) 872 NFSSETBOOTTIME(nfsboottime); 873 874 /* 875 * If server hasn't started yet, just return. 876 */ 877 NFSLOCKSTATE(); 878 if (nfsrv_stablefirst.nsf_eograce == 0) { 879 NFSUNLOCKSTATE(); 880 return; 881 } 882 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 883 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 884 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 885 nfsrv_stablefirst.nsf_flags |= 886 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 887 NFSUNLOCKSTATE(); 888 return; 889 } 890 891 /* 892 * Try and get a reference count on the nfsv4rootfs_lock so that 893 * no nfsd thread can acquire an exclusive lock on it before this 894 * call is done. If it is already exclusively locked, just return. 895 */ 896 NFSLOCKV4ROOTMUTEX(); 897 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 898 NFSUNLOCKV4ROOTMUTEX(); 899 if (got_ref == 0) { 900 NFSUNLOCKSTATE(); 901 return; 902 } 903 904 /* 905 * For each client... 906 */ 907 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 908 clp = LIST_FIRST(&nfsclienthash[i]); 909 while (clp != LIST_END(&nfsclienthash[i])) { 910 nclp = LIST_NEXT(clp, lc_hash); 911 if (!(clp->lc_flags & LCL_EXPIREIT)) { 912 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 913 && ((LIST_EMPTY(&clp->lc_deleg) 914 && LIST_EMPTY(&clp->lc_open)) || 915 nfsrv_clients > nfsrv_clienthighwater)) || 916 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 917 (clp->lc_expiry < NFSD_MONOSEC && 918 (nfsrv_openpluslock * 10 / 9) > NFSRV_V4STATELIMIT)) { 919 /* 920 * Lease has expired several nfsrv_lease times ago: 921 * PLUS 922 * - no state is associated with it 923 * OR 924 * - above high water mark for number of clients 925 * (nfsrv_clienthighwater should be large enough 926 * that this only occurs when clients fail to 927 * use the same nfs_client_id4.id. Maybe somewhat 928 * higher that the maximum number of clients that 929 * will mount this server?) 930 * OR 931 * Lease has expired a very long time ago 932 * OR 933 * Lease has expired PLUS the number of opens + locks 934 * has exceeded 90% of capacity 935 * 936 * --> Mark for expiry. The actual expiry will be done 937 * by an nfsd sometime soon. 938 */ 939 clp->lc_flags |= LCL_EXPIREIT; 940 nfsrv_stablefirst.nsf_flags |= 941 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 942 } else { 943 /* 944 * If there are no opens, increment no open tick cnt 945 * If time exceeds NFSNOOPEN, mark it to be thrown away 946 * otherwise, if there is an open, reset no open time 947 * Hopefully, this will avoid excessive re-creation 948 * of open owners and subsequent open confirms. 949 */ 950 stp = LIST_FIRST(&clp->lc_open); 951 while (stp != LIST_END(&clp->lc_open)) { 952 nstp = LIST_NEXT(stp, ls_list); 953 if (LIST_EMPTY(&stp->ls_open)) { 954 stp->ls_noopens++; 955 if (stp->ls_noopens > NFSNOOPEN || 956 (nfsrv_openpluslock * 2) > 957 NFSRV_V4STATELIMIT) 958 nfsrv_stablefirst.nsf_flags |= 959 NFSNSF_NOOPENS; 960 } else { 961 stp->ls_noopens = 0; 962 } 963 stp = nstp; 964 } 965 } 966 } 967 clp = nclp; 968 } 969 } 970 NFSUNLOCKSTATE(); 971 NFSLOCKV4ROOTMUTEX(); 972 nfsv4_relref(&nfsv4rootfs_lock); 973 NFSUNLOCKV4ROOTMUTEX(); 974 } 975 976 /* 977 * The following set of functions free up the various data structures. 978 */ 979 /* 980 * Clear out all open/lock state related to this nfsclient. 981 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 982 * there are no other active nfsd threads. 983 */ 984 APPLESTATIC void 985 nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 986 { 987 struct nfsstate *stp, *nstp; 988 989 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 990 nfsrv_freeopenowner(stp, 1, p); 991 } 992 993 /* 994 * Free a client that has been cleaned. It should also already have been 995 * removed from the lists. 996 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 997 * softclock interrupts are enabled.) 998 */ 999 APPLESTATIC void 1000 nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1001 { 1002 1003 #ifdef notyet 1004 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1005 (LCL_GSS | LCL_CALLBACKSON) && 1006 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1007 clp->lc_handlelen > 0) { 1008 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1009 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1010 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1011 NULL, 0, NULL, NULL, NULL, p); 1012 } 1013 #endif 1014 newnfs_disconnect(&clp->lc_req); 1015 NFSSOCKADDRFREE(clp->lc_req.nr_nam); 1016 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1017 free((caddr_t)clp, M_NFSDCLIENT); 1018 NFSLOCKSTATE(); 1019 newnfsstats.srvclients--; 1020 nfsrv_openpluslock--; 1021 nfsrv_clients--; 1022 NFSUNLOCKSTATE(); 1023 } 1024 1025 /* 1026 * Free a list of delegation state structures. 1027 * (This function will also free all nfslockfile structures that no 1028 * longer have associated state.) 1029 */ 1030 APPLESTATIC void 1031 nfsrv_freedeleglist(struct nfsstatehead *sthp) 1032 { 1033 struct nfsstate *stp, *nstp; 1034 1035 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1036 nfsrv_freedeleg(stp); 1037 } 1038 LIST_INIT(sthp); 1039 } 1040 1041 /* 1042 * Free up a delegation. 1043 */ 1044 static void 1045 nfsrv_freedeleg(struct nfsstate *stp) 1046 { 1047 struct nfslockfile *lfp; 1048 1049 LIST_REMOVE(stp, ls_hash); 1050 LIST_REMOVE(stp, ls_list); 1051 LIST_REMOVE(stp, ls_file); 1052 lfp = stp->ls_lfp; 1053 if (LIST_EMPTY(&lfp->lf_open) && 1054 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1055 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1056 lfp->lf_usecount == 0 && 1057 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1058 nfsrv_freenfslockfile(lfp); 1059 FREE((caddr_t)stp, M_NFSDSTATE); 1060 newnfsstats.srvdelegates--; 1061 nfsrv_openpluslock--; 1062 nfsrv_delegatecnt--; 1063 } 1064 1065 /* 1066 * This function frees an open owner and all associated opens. 1067 */ 1068 static void 1069 nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1070 { 1071 struct nfsstate *nstp, *tstp; 1072 1073 LIST_REMOVE(stp, ls_list); 1074 /* 1075 * Now, free all associated opens. 1076 */ 1077 nstp = LIST_FIRST(&stp->ls_open); 1078 while (nstp != LIST_END(&stp->ls_open)) { 1079 tstp = nstp; 1080 nstp = LIST_NEXT(nstp, ls_list); 1081 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1082 } 1083 if (stp->ls_op) 1084 nfsrvd_derefcache(stp->ls_op); 1085 FREE((caddr_t)stp, M_NFSDSTATE); 1086 newnfsstats.srvopenowners--; 1087 nfsrv_openpluslock--; 1088 } 1089 1090 /* 1091 * This function frees an open (nfsstate open structure) with all associated 1092 * lock_owners and locks. It also frees the nfslockfile structure iff there 1093 * are no other opens on the file. 1094 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1095 */ 1096 static int 1097 nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1098 { 1099 struct nfsstate *nstp, *tstp; 1100 struct nfslockfile *lfp; 1101 int ret; 1102 1103 LIST_REMOVE(stp, ls_hash); 1104 LIST_REMOVE(stp, ls_list); 1105 LIST_REMOVE(stp, ls_file); 1106 1107 lfp = stp->ls_lfp; 1108 /* 1109 * Now, free all lockowners associated with this open. 1110 */ 1111 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1112 nfsrv_freelockowner(tstp, vp, cansleep, p); 1113 1114 /* 1115 * The nfslockfile is freed here if there are no locks 1116 * associated with the open. 1117 * If there are locks associated with the open, the 1118 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1119 * Acquire the state mutex to avoid races with calls to 1120 * nfsrv_getlockfile(). 1121 */ 1122 if (cansleep != 0) 1123 NFSLOCKSTATE(); 1124 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1125 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1126 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1127 lfp->lf_usecount == 0 && 1128 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1129 nfsrv_freenfslockfile(lfp); 1130 ret = 1; 1131 } else 1132 ret = 0; 1133 if (cansleep != 0) 1134 NFSUNLOCKSTATE(); 1135 FREE((caddr_t)stp, M_NFSDSTATE); 1136 newnfsstats.srvopens--; 1137 nfsrv_openpluslock--; 1138 return (ret); 1139 } 1140 1141 /* 1142 * Frees a lockowner and all associated locks. 1143 */ 1144 static void 1145 nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1146 NFSPROC_T *p) 1147 { 1148 1149 LIST_REMOVE(stp, ls_hash); 1150 LIST_REMOVE(stp, ls_list); 1151 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1152 if (stp->ls_op) 1153 nfsrvd_derefcache(stp->ls_op); 1154 FREE((caddr_t)stp, M_NFSDSTATE); 1155 newnfsstats.srvlockowners--; 1156 nfsrv_openpluslock--; 1157 } 1158 1159 /* 1160 * Free all the nfs locks on a lockowner. 1161 */ 1162 static void 1163 nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1164 NFSPROC_T *p) 1165 { 1166 struct nfslock *lop, *nlop; 1167 struct nfsrollback *rlp, *nrlp; 1168 struct nfslockfile *lfp = NULL; 1169 int gottvp = 0; 1170 vnode_t tvp = NULL; 1171 uint64_t first, end; 1172 1173 lop = LIST_FIRST(&stp->ls_lock); 1174 while (lop != LIST_END(&stp->ls_lock)) { 1175 nlop = LIST_NEXT(lop, lo_lckowner); 1176 /* 1177 * Since all locks should be for the same file, lfp should 1178 * not change. 1179 */ 1180 if (lfp == NULL) 1181 lfp = lop->lo_lfp; 1182 else if (lfp != lop->lo_lfp) 1183 panic("allnfslocks"); 1184 /* 1185 * If vp is NULL and cansleep != 0, a vnode must be acquired 1186 * from the file handle. This only occurs when called from 1187 * nfsrv_cleanclient(). 1188 */ 1189 if (gottvp == 0) { 1190 if (nfsrv_dolocallocks == 0) 1191 tvp = NULL; 1192 else if (vp == NULL && cansleep != 0) 1193 tvp = nfsvno_getvp(&lfp->lf_fh); 1194 else 1195 tvp = vp; 1196 gottvp = 1; 1197 } 1198 1199 if (tvp != NULL) { 1200 if (cansleep == 0) 1201 panic("allnfs2"); 1202 first = lop->lo_first; 1203 end = lop->lo_end; 1204 nfsrv_freenfslock(lop); 1205 nfsrv_localunlock(tvp, lfp, first, end, p); 1206 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1207 nrlp) 1208 free(rlp, M_NFSDROLLBACK); 1209 LIST_INIT(&lfp->lf_rollback); 1210 } else 1211 nfsrv_freenfslock(lop); 1212 lop = nlop; 1213 } 1214 if (vp == NULL && tvp != NULL) 1215 vput(tvp); 1216 } 1217 1218 /* 1219 * Free an nfslock structure. 1220 */ 1221 static void 1222 nfsrv_freenfslock(struct nfslock *lop) 1223 { 1224 1225 if (lop->lo_lckfile.le_prev != NULL) { 1226 LIST_REMOVE(lop, lo_lckfile); 1227 newnfsstats.srvlocks--; 1228 nfsrv_openpluslock--; 1229 } 1230 LIST_REMOVE(lop, lo_lckowner); 1231 FREE((caddr_t)lop, M_NFSDLOCK); 1232 } 1233 1234 /* 1235 * This function frees an nfslockfile structure. 1236 */ 1237 static void 1238 nfsrv_freenfslockfile(struct nfslockfile *lfp) 1239 { 1240 1241 LIST_REMOVE(lfp, lf_hash); 1242 FREE((caddr_t)lfp, M_NFSDLOCKFILE); 1243 } 1244 1245 /* 1246 * This function looks up an nfsstate structure via stateid. 1247 */ 1248 static int 1249 nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1250 struct nfsstate **stpp) 1251 { 1252 struct nfsstate *stp; 1253 struct nfsstatehead *hp; 1254 int error = 0; 1255 1256 *stpp = NULL; 1257 hp = NFSSTATEHASH(clp, *stateidp); 1258 LIST_FOREACH(stp, hp, ls_hash) { 1259 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1260 NFSX_STATEIDOTHER)) 1261 break; 1262 } 1263 1264 /* 1265 * If no state id in list, return NFSERR_BADSTATEID. 1266 */ 1267 if (stp == LIST_END(hp)) { 1268 error = NFSERR_BADSTATEID; 1269 goto out; 1270 } 1271 *stpp = stp; 1272 1273 out: 1274 NFSEXITCODE(error); 1275 return (error); 1276 } 1277 1278 /* 1279 * This function gets an nfsstate structure via owner string. 1280 */ 1281 static void 1282 nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1283 struct nfsstate **stpp) 1284 { 1285 struct nfsstate *stp; 1286 1287 *stpp = NULL; 1288 LIST_FOREACH(stp, hp, ls_list) { 1289 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1290 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1291 *stpp = stp; 1292 return; 1293 } 1294 } 1295 } 1296 1297 /* 1298 * Lock control function called to update lock status. 1299 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1300 * that one isn't to be created and an NFSERR_xxx for other errors. 1301 * The structures new_stp and new_lop are passed in as pointers that should 1302 * be set to NULL if the structure is used and shouldn't be free'd. 1303 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1304 * never used and can safely be allocated on the stack. For all other 1305 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1306 * in case they are used. 1307 */ 1308 APPLESTATIC int 1309 nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1310 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1311 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1312 __unused struct nfsexstuff *exp, 1313 struct nfsrv_descript *nd, NFSPROC_T *p) 1314 { 1315 struct nfslock *lop; 1316 struct nfsstate *new_stp = *new_stpp; 1317 struct nfslock *new_lop = *new_lopp; 1318 struct nfsstate *tstp, *mystp, *nstp; 1319 int specialid = 0; 1320 struct nfslockfile *lfp; 1321 struct nfslock *other_lop = NULL; 1322 struct nfsstate *stp, *lckstp = NULL; 1323 struct nfsclient *clp = NULL; 1324 u_int32_t bits; 1325 int error = 0, haslock = 0, ret, reterr; 1326 int getlckret, delegation = 0, filestruct_locked; 1327 fhandle_t nfh; 1328 uint64_t first, end; 1329 uint32_t lock_flags; 1330 1331 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1332 /* 1333 * Note the special cases of "all 1s" or "all 0s" stateids and 1334 * let reads with all 1s go ahead. 1335 */ 1336 if (new_stp->ls_stateid.seqid == 0x0 && 1337 new_stp->ls_stateid.other[0] == 0x0 && 1338 new_stp->ls_stateid.other[1] == 0x0 && 1339 new_stp->ls_stateid.other[2] == 0x0) 1340 specialid = 1; 1341 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1342 new_stp->ls_stateid.other[0] == 0xffffffff && 1343 new_stp->ls_stateid.other[1] == 0xffffffff && 1344 new_stp->ls_stateid.other[2] == 0xffffffff) 1345 specialid = 2; 1346 } 1347 1348 /* 1349 * Check for restart conditions (client and server). 1350 */ 1351 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1352 &new_stp->ls_stateid, specialid); 1353 if (error) 1354 goto out; 1355 1356 /* 1357 * Check for state resource limit exceeded. 1358 */ 1359 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1360 nfsrv_openpluslock > NFSRV_V4STATELIMIT) { 1361 error = NFSERR_RESOURCE; 1362 goto out; 1363 } 1364 1365 /* 1366 * For the lock case, get another nfslock structure, 1367 * just in case we need it. 1368 * Malloc now, before we start sifting through the linked lists, 1369 * in case we have to wait for memory. 1370 */ 1371 tryagain: 1372 if (new_stp->ls_flags & NFSLCK_LOCK) 1373 MALLOC(other_lop, struct nfslock *, sizeof (struct nfslock), 1374 M_NFSDLOCK, M_WAITOK); 1375 filestruct_locked = 0; 1376 reterr = 0; 1377 lfp = NULL; 1378 1379 /* 1380 * Get the lockfile structure for CFH now, so we can do a sanity 1381 * check against the stateid, before incrementing the seqid#, since 1382 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1383 * shouldn't be incremented for this case. 1384 * If nfsrv_getlockfile() returns -1, it means "not found", which 1385 * will be handled later. 1386 * If we are doing Lock/LockU and local locking is enabled, sleep 1387 * lock the nfslockfile structure. 1388 */ 1389 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1390 NFSLOCKSTATE(); 1391 if (getlckret == 0) { 1392 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1393 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1394 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1395 &lfp, &nfh, 1); 1396 if (getlckret == 0) 1397 filestruct_locked = 1; 1398 } else 1399 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1400 &lfp, &nfh, 0); 1401 } 1402 if (getlckret != 0 && getlckret != -1) 1403 reterr = getlckret; 1404 1405 if (filestruct_locked != 0) { 1406 LIST_INIT(&lfp->lf_rollback); 1407 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1408 /* 1409 * For local locking, do the advisory locking now, so 1410 * that any conflict can be detected. A failure later 1411 * can be rolled back locally. If an error is returned, 1412 * struct nfslockfile has been unlocked and any local 1413 * locking rolled back. 1414 */ 1415 NFSUNLOCKSTATE(); 1416 reterr = nfsrv_locallock(vp, lfp, 1417 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1418 new_lop->lo_first, new_lop->lo_end, cfp, p); 1419 NFSLOCKSTATE(); 1420 } 1421 } 1422 1423 if (specialid == 0) { 1424 if (new_stp->ls_flags & NFSLCK_TEST) { 1425 /* 1426 * RFC 3530 does not list LockT as an op that renews a 1427 * lease, but the concensus seems to be that it is ok 1428 * for a server to do so. 1429 */ 1430 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 1431 (nfsquad_t)((u_quad_t)0), NULL, p); 1432 1433 /* 1434 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1435 * error returns for LockT, just go ahead and test for a lock, 1436 * since there are no locks for this client, but other locks 1437 * can conflict. (ie. same client will always be false) 1438 */ 1439 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1440 error = 0; 1441 lckstp = new_stp; 1442 } else { 1443 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 1444 (nfsquad_t)((u_quad_t)0), NULL, p); 1445 if (error == 0) 1446 /* 1447 * Look up the stateid 1448 */ 1449 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1450 new_stp->ls_flags, &stp); 1451 /* 1452 * do some sanity checks for an unconfirmed open or a 1453 * stateid that refers to the wrong file, for an open stateid 1454 */ 1455 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1456 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1457 (getlckret == 0 && stp->ls_lfp != lfp))) 1458 error = NFSERR_BADSTATEID; 1459 if (error == 0 && 1460 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1461 getlckret == 0 && stp->ls_lfp != lfp) 1462 error = NFSERR_BADSTATEID; 1463 1464 /* 1465 * If the lockowner stateid doesn't refer to the same file, 1466 * I believe that is considered ok, since some clients will 1467 * only create a single lockowner and use that for all locks 1468 * on all files. 1469 * For now, log it as a diagnostic, instead of considering it 1470 * a BadStateid. 1471 */ 1472 if (error == 0 && (stp->ls_flags & 1473 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1474 getlckret == 0 && stp->ls_lfp != lfp) { 1475 #ifdef DIAGNOSTIC 1476 printf("Got a lock statid for different file open\n"); 1477 #endif 1478 /* 1479 error = NFSERR_BADSTATEID; 1480 */ 1481 } 1482 1483 if (error == 0) { 1484 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1485 /* 1486 * If haslock set, we've already checked the seqid. 1487 */ 1488 if (!haslock) { 1489 if (stp->ls_flags & NFSLCK_OPEN) 1490 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1491 stp->ls_openowner, new_stp->ls_op); 1492 else 1493 error = NFSERR_BADSTATEID; 1494 } 1495 if (!error) 1496 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1497 if (lckstp) 1498 /* 1499 * I believe this should be an error, but it 1500 * isn't obvious what NFSERR_xxx would be 1501 * appropriate, so I'll use NFSERR_INVAL for now. 1502 */ 1503 error = NFSERR_INVAL; 1504 else 1505 lckstp = new_stp; 1506 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1507 /* 1508 * If haslock set, ditto above. 1509 */ 1510 if (!haslock) { 1511 if (stp->ls_flags & NFSLCK_OPEN) 1512 error = NFSERR_BADSTATEID; 1513 else 1514 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1515 stp, new_stp->ls_op); 1516 } 1517 lckstp = stp; 1518 } else { 1519 lckstp = stp; 1520 } 1521 } 1522 /* 1523 * If the seqid part of the stateid isn't the same, return 1524 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1525 * For I/O Ops, only return NFSERR_OLDSTATEID if 1526 * nfsrv_returnoldstateid is set. (The concensus on the email 1527 * list was that most clients would prefer to not receive 1528 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1529 * is what will happen, so I use the nfsrv_returnoldstateid to 1530 * allow for either server configuration.) 1531 */ 1532 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1533 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1534 nfsrv_returnoldstateid)) 1535 error = NFSERR_OLDSTATEID; 1536 } 1537 } 1538 1539 /* 1540 * Now we can check for grace. 1541 */ 1542 if (!error) 1543 error = nfsrv_checkgrace(new_stp->ls_flags); 1544 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1545 nfsrv_checkstable(clp)) 1546 error = NFSERR_NOGRACE; 1547 /* 1548 * If we successfully Reclaimed state, note that. 1549 */ 1550 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1551 nfsrv_markstable(clp); 1552 1553 /* 1554 * At this point, either error == NFSERR_BADSTATEID or the 1555 * seqid# has been updated, so we can return any error. 1556 * If error == 0, there may be an error in: 1557 * nd_repstat - Set by the calling function. 1558 * reterr - Set above, if getting the nfslockfile structure 1559 * or acquiring the local lock failed. 1560 * (If both of these are set, nd_repstat should probably be 1561 * returned, since that error was detected before this 1562 * function call.) 1563 */ 1564 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1565 if (error == 0) { 1566 if (nd->nd_repstat != 0) 1567 error = nd->nd_repstat; 1568 else 1569 error = reterr; 1570 } 1571 if (filestruct_locked != 0) { 1572 /* Roll back local locks. */ 1573 NFSUNLOCKSTATE(); 1574 nfsrv_locallock_rollback(vp, lfp, p); 1575 NFSLOCKSTATE(); 1576 nfsrv_unlocklf(lfp); 1577 } 1578 NFSUNLOCKSTATE(); 1579 goto out; 1580 } 1581 1582 /* 1583 * Check the nfsrv_getlockfile return. 1584 * Returned -1 if no structure found. 1585 */ 1586 if (getlckret == -1) { 1587 error = NFSERR_EXPIRED; 1588 /* 1589 * Called from lockt, so no lock is OK. 1590 */ 1591 if (new_stp->ls_flags & NFSLCK_TEST) { 1592 error = 0; 1593 } else if (new_stp->ls_flags & 1594 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1595 /* 1596 * Called to check for a lock, OK if the stateid is all 1597 * 1s or all 0s, but there should be an nfsstate 1598 * otherwise. 1599 * (ie. If there is no open, I'll assume no share 1600 * deny bits.) 1601 */ 1602 if (specialid) 1603 error = 0; 1604 else 1605 error = NFSERR_BADSTATEID; 1606 } 1607 NFSUNLOCKSTATE(); 1608 goto out; 1609 } 1610 1611 /* 1612 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 1613 * For NFSLCK_CHECK, allow a read if write access is granted, 1614 * but check for a deny. For NFSLCK_LOCK, require correct access, 1615 * which implies a conflicting deny can't exist. 1616 */ 1617 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 1618 /* 1619 * Four kinds of state id: 1620 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 1621 * - stateid for an open 1622 * - stateid for a delegation 1623 * - stateid for a lock owner 1624 */ 1625 if (!specialid) { 1626 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 1627 delegation = 1; 1628 mystp = stp; 1629 nfsrv_delaydelegtimeout(stp); 1630 } else if (stp->ls_flags & NFSLCK_OPEN) { 1631 mystp = stp; 1632 } else { 1633 mystp = stp->ls_openstp; 1634 } 1635 /* 1636 * If locking or checking, require correct access 1637 * bit set. 1638 */ 1639 if (((new_stp->ls_flags & NFSLCK_LOCK) && 1640 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 1641 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 1642 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 1643 (NFSLCK_CHECK | NFSLCK_READACCESS) && 1644 !(mystp->ls_flags & NFSLCK_READACCESS)) || 1645 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 1646 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 1647 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 1648 if (filestruct_locked != 0) { 1649 /* Roll back local locks. */ 1650 NFSUNLOCKSTATE(); 1651 nfsrv_locallock_rollback(vp, lfp, p); 1652 NFSLOCKSTATE(); 1653 nfsrv_unlocklf(lfp); 1654 } 1655 NFSUNLOCKSTATE(); 1656 error = NFSERR_OPENMODE; 1657 goto out; 1658 } 1659 } else 1660 mystp = NULL; 1661 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 1662 /* 1663 * Check for a conflicting deny bit. 1664 */ 1665 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 1666 if (tstp != mystp) { 1667 bits = tstp->ls_flags; 1668 bits >>= NFSLCK_SHIFT; 1669 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 1670 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 1671 vp, p); 1672 if (ret == 1) { 1673 /* 1674 * nfsrv_clientconflict unlocks state 1675 * when it returns non-zero. 1676 */ 1677 lckstp = NULL; 1678 goto tryagain; 1679 } 1680 if (ret == 0) 1681 NFSUNLOCKSTATE(); 1682 if (ret == 2) 1683 error = NFSERR_PERM; 1684 else 1685 error = NFSERR_OPENMODE; 1686 goto out; 1687 } 1688 } 1689 } 1690 1691 /* We're outta here */ 1692 NFSUNLOCKSTATE(); 1693 goto out; 1694 } 1695 } 1696 1697 /* 1698 * For setattr, just get rid of all the Delegations for other clients. 1699 */ 1700 if (new_stp->ls_flags & NFSLCK_SETATTR) { 1701 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 1702 if (ret) { 1703 /* 1704 * nfsrv_cleandeleg() unlocks state when it 1705 * returns non-zero. 1706 */ 1707 if (ret == -1) { 1708 lckstp = NULL; 1709 goto tryagain; 1710 } 1711 error = ret; 1712 goto out; 1713 } 1714 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 1715 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 1716 LIST_EMPTY(&lfp->lf_deleg))) { 1717 NFSUNLOCKSTATE(); 1718 goto out; 1719 } 1720 } 1721 1722 /* 1723 * Check for a conflicting delegation. If one is found, call 1724 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 1725 * been set yet, it will get the lock. Otherwise, it will recall 1726 * the delegation. Then, we try try again... 1727 * I currently believe the conflict algorithm to be: 1728 * For Lock Ops (Lock/LockT/LockU) 1729 * - there is a conflict iff a different client has a write delegation 1730 * For Reading (Read Op) 1731 * - there is a conflict iff a different client has a write delegation 1732 * (the specialids are always a different client) 1733 * For Writing (Write/Setattr of size) 1734 * - there is a conflict if a different client has any delegation 1735 * - there is a conflict if the same client has a read delegation 1736 * (I don't understand why this isn't allowed, but that seems to be 1737 * the current concensus?) 1738 */ 1739 tstp = LIST_FIRST(&lfp->lf_deleg); 1740 while (tstp != LIST_END(&lfp->lf_deleg)) { 1741 nstp = LIST_NEXT(tstp, ls_file); 1742 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 1743 ((new_stp->ls_flags & NFSLCK_CHECK) && 1744 (new_lop->lo_flags & NFSLCK_READ))) && 1745 clp != tstp->ls_clp && 1746 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 1747 ((new_stp->ls_flags & NFSLCK_CHECK) && 1748 (new_lop->lo_flags & NFSLCK_WRITE) && 1749 (clp != tstp->ls_clp || 1750 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 1751 if (filestruct_locked != 0) { 1752 /* Roll back local locks. */ 1753 NFSUNLOCKSTATE(); 1754 nfsrv_locallock_rollback(vp, lfp, p); 1755 NFSLOCKSTATE(); 1756 nfsrv_unlocklf(lfp); 1757 } 1758 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 1759 if (ret) { 1760 /* 1761 * nfsrv_delegconflict unlocks state when it 1762 * returns non-zero, which it always does. 1763 */ 1764 if (other_lop) { 1765 FREE((caddr_t)other_lop, M_NFSDLOCK); 1766 other_lop = NULL; 1767 } 1768 if (ret == -1) { 1769 lckstp = NULL; 1770 goto tryagain; 1771 } 1772 error = ret; 1773 goto out; 1774 } 1775 /* Never gets here. */ 1776 } 1777 tstp = nstp; 1778 } 1779 1780 /* 1781 * Handle the unlock case by calling nfsrv_updatelock(). 1782 * (Should I have done some access checking above for unlock? For now, 1783 * just let it happen.) 1784 */ 1785 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 1786 first = new_lop->lo_first; 1787 end = new_lop->lo_end; 1788 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 1789 stateidp->seqid = ++(stp->ls_stateid.seqid); 1790 stateidp->other[0] = stp->ls_stateid.other[0]; 1791 stateidp->other[1] = stp->ls_stateid.other[1]; 1792 stateidp->other[2] = stp->ls_stateid.other[2]; 1793 if (filestruct_locked != 0) { 1794 NFSUNLOCKSTATE(); 1795 /* Update the local locks. */ 1796 nfsrv_localunlock(vp, lfp, first, end, p); 1797 NFSLOCKSTATE(); 1798 nfsrv_unlocklf(lfp); 1799 } 1800 NFSUNLOCKSTATE(); 1801 goto out; 1802 } 1803 1804 /* 1805 * Search for a conflicting lock. A lock conflicts if: 1806 * - the lock range overlaps and 1807 * - at least one lock is a write lock and 1808 * - it is not owned by the same lock owner 1809 */ 1810 if (!delegation) { 1811 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 1812 if (new_lop->lo_end > lop->lo_first && 1813 new_lop->lo_first < lop->lo_end && 1814 (new_lop->lo_flags == NFSLCK_WRITE || 1815 lop->lo_flags == NFSLCK_WRITE) && 1816 lckstp != lop->lo_stp && 1817 (clp != lop->lo_stp->ls_clp || 1818 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 1819 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 1820 lckstp->ls_ownerlen))) { 1821 if (other_lop) { 1822 FREE((caddr_t)other_lop, M_NFSDLOCK); 1823 other_lop = NULL; 1824 } 1825 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp,&haslock,vp,p); 1826 if (ret == 1) { 1827 if (filestruct_locked != 0) { 1828 /* Roll back local locks. */ 1829 nfsrv_locallock_rollback(vp, lfp, p); 1830 NFSLOCKSTATE(); 1831 nfsrv_unlocklf(lfp); 1832 NFSUNLOCKSTATE(); 1833 } 1834 /* 1835 * nfsrv_clientconflict() unlocks state when it 1836 * returns non-zero. 1837 */ 1838 lckstp = NULL; 1839 goto tryagain; 1840 } 1841 /* 1842 * Found a conflicting lock, so record the conflict and 1843 * return the error. 1844 */ 1845 if (cfp != NULL && ret == 0) { 1846 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 1847 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 1848 cfp->cl_first = lop->lo_first; 1849 cfp->cl_end = lop->lo_end; 1850 cfp->cl_flags = lop->lo_flags; 1851 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 1852 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 1853 cfp->cl_ownerlen); 1854 } 1855 if (ret == 2) 1856 error = NFSERR_PERM; 1857 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 1858 error = NFSERR_RECLAIMCONFLICT; 1859 else if (new_stp->ls_flags & NFSLCK_CHECK) 1860 error = NFSERR_LOCKED; 1861 else 1862 error = NFSERR_DENIED; 1863 if (filestruct_locked != 0 && ret == 0) { 1864 /* Roll back local locks. */ 1865 NFSUNLOCKSTATE(); 1866 nfsrv_locallock_rollback(vp, lfp, p); 1867 NFSLOCKSTATE(); 1868 nfsrv_unlocklf(lfp); 1869 } 1870 if (ret == 0) 1871 NFSUNLOCKSTATE(); 1872 goto out; 1873 } 1874 } 1875 } 1876 1877 /* 1878 * We only get here if there was no lock that conflicted. 1879 */ 1880 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 1881 NFSUNLOCKSTATE(); 1882 goto out; 1883 } 1884 1885 /* 1886 * We only get here when we are creating or modifying a lock. 1887 * There are two variants: 1888 * - exist_lock_owner where lock_owner exists 1889 * - open_to_lock_owner with new lock_owner 1890 */ 1891 first = new_lop->lo_first; 1892 end = new_lop->lo_end; 1893 lock_flags = new_lop->lo_flags; 1894 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 1895 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 1896 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 1897 stateidp->other[0] = lckstp->ls_stateid.other[0]; 1898 stateidp->other[1] = lckstp->ls_stateid.other[1]; 1899 stateidp->other[2] = lckstp->ls_stateid.other[2]; 1900 } else { 1901 /* 1902 * The new open_to_lock_owner case. 1903 * Link the new nfsstate into the lists. 1904 */ 1905 new_stp->ls_seq = new_stp->ls_opentolockseq; 1906 nfsrvd_refcache(new_stp->ls_op); 1907 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 1908 stateidp->other[0] = new_stp->ls_stateid.other[0] = 1909 clp->lc_clientid.lval[0]; 1910 stateidp->other[1] = new_stp->ls_stateid.other[1] = 1911 clp->lc_clientid.lval[1]; 1912 stateidp->other[2] = new_stp->ls_stateid.other[2] = 1913 nfsrv_nextstateindex(clp); 1914 new_stp->ls_clp = clp; 1915 LIST_INIT(&new_stp->ls_lock); 1916 new_stp->ls_openstp = stp; 1917 new_stp->ls_lfp = lfp; 1918 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 1919 lfp); 1920 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 1921 new_stp, ls_hash); 1922 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 1923 *new_lopp = NULL; 1924 *new_stpp = NULL; 1925 newnfsstats.srvlockowners++; 1926 nfsrv_openpluslock++; 1927 } 1928 if (filestruct_locked != 0) { 1929 NFSUNLOCKSTATE(); 1930 nfsrv_locallock_commit(lfp, lock_flags, first, end); 1931 NFSLOCKSTATE(); 1932 nfsrv_unlocklf(lfp); 1933 } 1934 NFSUNLOCKSTATE(); 1935 1936 out: 1937 if (haslock) { 1938 NFSLOCKV4ROOTMUTEX(); 1939 nfsv4_unlock(&nfsv4rootfs_lock, 1); 1940 NFSUNLOCKV4ROOTMUTEX(); 1941 } 1942 if (other_lop) 1943 FREE((caddr_t)other_lop, M_NFSDLOCK); 1944 NFSEXITCODE2(error, nd); 1945 return (error); 1946 } 1947 1948 /* 1949 * Check for state errors for Open. 1950 * repstat is passed back out as an error if more critical errors 1951 * are not detected. 1952 */ 1953 APPLESTATIC int 1954 nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 1955 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 1956 NFSPROC_T *p, int repstat) 1957 { 1958 struct nfsstate *stp, *nstp; 1959 struct nfsclient *clp; 1960 struct nfsstate *ownerstp; 1961 struct nfslockfile *lfp, *new_lfp; 1962 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 1963 1964 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 1965 readonly = 1; 1966 /* 1967 * Check for restart conditions (client and server). 1968 */ 1969 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1970 &new_stp->ls_stateid, 0); 1971 if (error) 1972 goto out; 1973 1974 /* 1975 * Check for state resource limit exceeded. 1976 * Technically this should be SMP protected, but the worst 1977 * case error is "out by one or two" on the count when it 1978 * returns NFSERR_RESOURCE and the limit is just a rather 1979 * arbitrary high water mark, so no harm is done. 1980 */ 1981 if (nfsrv_openpluslock > NFSRV_V4STATELIMIT) { 1982 error = NFSERR_RESOURCE; 1983 goto out; 1984 } 1985 1986 tryagain: 1987 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 1988 M_NFSDLOCKFILE, M_WAITOK); 1989 if (vp) 1990 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, &new_lfp, 1991 NULL, p); 1992 NFSLOCKSTATE(); 1993 /* 1994 * Get the nfsclient structure. 1995 */ 1996 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 1997 (nfsquad_t)((u_quad_t)0), NULL, p); 1998 1999 /* 2000 * Look up the open owner. See if it needs confirmation and 2001 * check the seq#, as required. 2002 */ 2003 if (!error) 2004 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2005 2006 if (!error && ownerstp) { 2007 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2008 new_stp->ls_op); 2009 /* 2010 * If the OpenOwner hasn't been confirmed, assume the 2011 * old one was a replay and this one is ok. 2012 * See: RFC3530 Sec. 14.2.18. 2013 */ 2014 if (error == NFSERR_BADSEQID && 2015 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2016 error = 0; 2017 } 2018 2019 /* 2020 * Check for grace. 2021 */ 2022 if (!error) 2023 error = nfsrv_checkgrace(new_stp->ls_flags); 2024 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2025 nfsrv_checkstable(clp)) 2026 error = NFSERR_NOGRACE; 2027 2028 /* 2029 * If none of the above errors occurred, let repstat be 2030 * returned. 2031 */ 2032 if (repstat && !error) 2033 error = repstat; 2034 if (error) { 2035 NFSUNLOCKSTATE(); 2036 if (haslock) { 2037 NFSLOCKV4ROOTMUTEX(); 2038 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2039 NFSUNLOCKV4ROOTMUTEX(); 2040 } 2041 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2042 goto out; 2043 } 2044 2045 /* 2046 * If vp == NULL, the file doesn't exist yet, so return ok. 2047 * (This always happens on the first pass, so haslock must be 0.) 2048 */ 2049 if (vp == NULL) { 2050 NFSUNLOCKSTATE(); 2051 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2052 goto out; 2053 } 2054 2055 /* 2056 * Get the structure for the underlying file. 2057 */ 2058 if (getfhret) 2059 error = getfhret; 2060 else 2061 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2062 NULL, 0); 2063 if (new_lfp) 2064 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2065 if (error) { 2066 NFSUNLOCKSTATE(); 2067 if (haslock) { 2068 NFSLOCKV4ROOTMUTEX(); 2069 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2070 NFSUNLOCKV4ROOTMUTEX(); 2071 } 2072 goto out; 2073 } 2074 2075 /* 2076 * Search for a conflicting open/share. 2077 */ 2078 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2079 /* 2080 * For Delegate_Cur, search for the matching Delegation, 2081 * which indicates no conflict. 2082 * An old delegation should have been recovered by the 2083 * client doing a Claim_DELEGATE_Prev, so I won't let 2084 * it match and return NFSERR_EXPIRED. Should I let it 2085 * match? 2086 */ 2087 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2088 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2089 stateidp->seqid == stp->ls_stateid.seqid && 2090 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2091 NFSX_STATEIDOTHER)) 2092 break; 2093 } 2094 if (stp == LIST_END(&lfp->lf_deleg) || 2095 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2096 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2097 NFSUNLOCKSTATE(); 2098 if (haslock) { 2099 NFSLOCKV4ROOTMUTEX(); 2100 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2101 NFSUNLOCKV4ROOTMUTEX(); 2102 } 2103 error = NFSERR_EXPIRED; 2104 goto out; 2105 } 2106 } 2107 2108 /* 2109 * Check for access/deny bit conflicts. I check for the same 2110 * owner as well, in case the client didn't bother. 2111 */ 2112 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2113 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2114 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2115 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2116 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2117 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2118 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2119 if (ret == 1) { 2120 /* 2121 * nfsrv_clientconflict() unlocks 2122 * state when it returns non-zero. 2123 */ 2124 goto tryagain; 2125 } 2126 if (ret == 2) 2127 error = NFSERR_PERM; 2128 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2129 error = NFSERR_RECLAIMCONFLICT; 2130 else 2131 error = NFSERR_SHAREDENIED; 2132 if (ret == 0) 2133 NFSUNLOCKSTATE(); 2134 if (haslock) { 2135 NFSLOCKV4ROOTMUTEX(); 2136 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2137 NFSUNLOCKV4ROOTMUTEX(); 2138 } 2139 goto out; 2140 } 2141 } 2142 2143 /* 2144 * Check for a conflicting delegation. If one is found, call 2145 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2146 * been set yet, it will get the lock. Otherwise, it will recall 2147 * the delegation. Then, we try try again... 2148 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2149 * isn't a conflict.) 2150 * I currently believe the conflict algorithm to be: 2151 * For Open with Read Access and Deny None 2152 * - there is a conflict iff a different client has a write delegation 2153 * For Open with other Write Access or any Deny except None 2154 * - there is a conflict if a different client has any delegation 2155 * - there is a conflict if the same client has a read delegation 2156 * (The current concensus is that this last case should be 2157 * considered a conflict since the client with a read delegation 2158 * could have done an Open with ReadAccess and WriteDeny 2159 * locally and then not have checked for the WriteDeny.) 2160 * Don't check for a Reclaim, since that will be dealt with 2161 * by nfsrv_openctrl(). 2162 */ 2163 if (!(new_stp->ls_flags & 2164 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2165 stp = LIST_FIRST(&lfp->lf_deleg); 2166 while (stp != LIST_END(&lfp->lf_deleg)) { 2167 nstp = LIST_NEXT(stp, ls_file); 2168 if ((readonly && stp->ls_clp != clp && 2169 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2170 (!readonly && (stp->ls_clp != clp || 2171 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2172 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2173 if (ret) { 2174 /* 2175 * nfsrv_delegconflict() unlocks state 2176 * when it returns non-zero. 2177 */ 2178 if (ret == -1) 2179 goto tryagain; 2180 error = ret; 2181 goto out; 2182 } 2183 } 2184 stp = nstp; 2185 } 2186 } 2187 NFSUNLOCKSTATE(); 2188 if (haslock) { 2189 NFSLOCKV4ROOTMUTEX(); 2190 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2191 NFSUNLOCKV4ROOTMUTEX(); 2192 } 2193 2194 out: 2195 NFSEXITCODE2(error, nd); 2196 return (error); 2197 } 2198 2199 /* 2200 * Open control function to create/update open state for an open. 2201 */ 2202 APPLESTATIC int 2203 nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2204 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2205 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2206 NFSPROC_T *p, u_quad_t filerev) 2207 { 2208 struct nfsstate *new_stp = *new_stpp; 2209 struct nfsstate *stp, *nstp; 2210 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2211 struct nfslockfile *lfp, *new_lfp; 2212 struct nfsclient *clp; 2213 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2214 int readonly = 0, cbret = 1, getfhret = 0; 2215 2216 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2217 readonly = 1; 2218 /* 2219 * Check for restart conditions (client and server). 2220 * (Paranoia, should have been detected by nfsrv_opencheck().) 2221 * If an error does show up, return NFSERR_EXPIRED, since the 2222 * the seqid# has already been incremented. 2223 */ 2224 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2225 &new_stp->ls_stateid, 0); 2226 if (error) { 2227 printf("Nfsd: openctrl unexpected restart err=%d\n", 2228 error); 2229 error = NFSERR_EXPIRED; 2230 goto out; 2231 } 2232 2233 tryagain: 2234 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2235 M_NFSDLOCKFILE, M_WAITOK); 2236 MALLOC(new_open, struct nfsstate *, sizeof (struct nfsstate), 2237 M_NFSDSTATE, M_WAITOK); 2238 MALLOC(new_deleg, struct nfsstate *, sizeof (struct nfsstate), 2239 M_NFSDSTATE, M_WAITOK); 2240 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, &new_lfp, 2241 NULL, p); 2242 NFSLOCKSTATE(); 2243 /* 2244 * Get the client structure. Since the linked lists could be changed 2245 * by other nfsd processes if this process does a tsleep(), one of 2246 * two things must be done. 2247 * 1 - don't tsleep() 2248 * or 2249 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2250 * before using the lists, since this lock stops the other 2251 * nfsd. This should only be used for rare cases, since it 2252 * essentially single threads the nfsd. 2253 * At this time, it is only done for cases where the stable 2254 * storage file must be written prior to completion of state 2255 * expiration. 2256 */ 2257 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 2258 (nfsquad_t)((u_quad_t)0), NULL, p); 2259 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2260 clp->lc_program) { 2261 /* 2262 * This happens on the first open for a client 2263 * that supports callbacks. 2264 */ 2265 NFSUNLOCKSTATE(); 2266 /* 2267 * Although nfsrv_docallback() will sleep, clp won't 2268 * go away, since they are only removed when the 2269 * nfsv4_lock() has blocked the nfsd threads. The 2270 * fields in clp can change, but having multiple 2271 * threads do this Null callback RPC should be 2272 * harmless. 2273 */ 2274 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2275 NULL, 0, NULL, NULL, NULL, p); 2276 NFSLOCKSTATE(); 2277 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2278 if (!cbret) 2279 clp->lc_flags |= LCL_CALLBACKSON; 2280 } 2281 2282 /* 2283 * Look up the open owner. See if it needs confirmation and 2284 * check the seq#, as required. 2285 */ 2286 if (!error) 2287 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2288 2289 if (error) { 2290 NFSUNLOCKSTATE(); 2291 printf("Nfsd: openctrl unexpected state err=%d\n", 2292 error); 2293 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2294 free((caddr_t)new_open, M_NFSDSTATE); 2295 free((caddr_t)new_deleg, M_NFSDSTATE); 2296 if (haslock) { 2297 NFSLOCKV4ROOTMUTEX(); 2298 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2299 NFSUNLOCKV4ROOTMUTEX(); 2300 } 2301 error = NFSERR_EXPIRED; 2302 goto out; 2303 } 2304 2305 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2306 nfsrv_markstable(clp); 2307 2308 /* 2309 * Get the structure for the underlying file. 2310 */ 2311 if (getfhret) 2312 error = getfhret; 2313 else 2314 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2315 NULL, 0); 2316 if (new_lfp) 2317 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2318 if (error) { 2319 NFSUNLOCKSTATE(); 2320 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2321 error); 2322 free((caddr_t)new_open, M_NFSDSTATE); 2323 free((caddr_t)new_deleg, M_NFSDSTATE); 2324 if (haslock) { 2325 NFSLOCKV4ROOTMUTEX(); 2326 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2327 NFSUNLOCKV4ROOTMUTEX(); 2328 } 2329 goto out; 2330 } 2331 2332 /* 2333 * Search for a conflicting open/share. 2334 */ 2335 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2336 /* 2337 * For Delegate_Cur, search for the matching Delegation, 2338 * which indicates no conflict. 2339 * An old delegation should have been recovered by the 2340 * client doing a Claim_DELEGATE_Prev, so I won't let 2341 * it match and return NFSERR_EXPIRED. Should I let it 2342 * match? 2343 */ 2344 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2345 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2346 stateidp->seqid == stp->ls_stateid.seqid && 2347 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2348 NFSX_STATEIDOTHER)) 2349 break; 2350 } 2351 if (stp == LIST_END(&lfp->lf_deleg) || 2352 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2353 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2354 NFSUNLOCKSTATE(); 2355 printf("Nfsd openctrl unexpected expiry\n"); 2356 free((caddr_t)new_open, M_NFSDSTATE); 2357 free((caddr_t)new_deleg, M_NFSDSTATE); 2358 if (haslock) { 2359 NFSLOCKV4ROOTMUTEX(); 2360 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2361 NFSUNLOCKV4ROOTMUTEX(); 2362 } 2363 error = NFSERR_EXPIRED; 2364 goto out; 2365 } 2366 2367 /* 2368 * Don't issue a Delegation, since one already exists and 2369 * delay delegation timeout, as required. 2370 */ 2371 delegate = 0; 2372 nfsrv_delaydelegtimeout(stp); 2373 } 2374 2375 /* 2376 * Check for access/deny bit conflicts. I also check for the 2377 * same owner, since the client might not have bothered to check. 2378 * Also, note an open for the same file and owner, if found, 2379 * which is all we do here for Delegate_Cur, since conflict 2380 * checking is already done. 2381 */ 2382 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2383 if (ownerstp && stp->ls_openowner == ownerstp) 2384 openstp = stp; 2385 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2386 /* 2387 * If another client has the file open, the only 2388 * delegation that can be issued is a Read delegation 2389 * and only if it is a Read open with Deny none. 2390 */ 2391 if (clp != stp->ls_clp) { 2392 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2393 NFSLCK_READACCESS) 2394 writedeleg = 0; 2395 else 2396 delegate = 0; 2397 } 2398 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2399 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2400 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2401 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2402 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2403 if (ret == 1) { 2404 /* 2405 * nfsrv_clientconflict() unlocks state 2406 * when it returns non-zero. 2407 */ 2408 free((caddr_t)new_open, M_NFSDSTATE); 2409 free((caddr_t)new_deleg, M_NFSDSTATE); 2410 openstp = NULL; 2411 goto tryagain; 2412 } 2413 if (ret == 2) 2414 error = NFSERR_PERM; 2415 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2416 error = NFSERR_RECLAIMCONFLICT; 2417 else 2418 error = NFSERR_SHAREDENIED; 2419 if (ret == 0) 2420 NFSUNLOCKSTATE(); 2421 if (haslock) { 2422 NFSLOCKV4ROOTMUTEX(); 2423 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2424 NFSUNLOCKV4ROOTMUTEX(); 2425 } 2426 free((caddr_t)new_open, M_NFSDSTATE); 2427 free((caddr_t)new_deleg, M_NFSDSTATE); 2428 printf("nfsd openctrl unexpected client cnfl\n"); 2429 goto out; 2430 } 2431 } 2432 } 2433 2434 /* 2435 * Check for a conflicting delegation. If one is found, call 2436 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2437 * been set yet, it will get the lock. Otherwise, it will recall 2438 * the delegation. Then, we try try again... 2439 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2440 * isn't a conflict.) 2441 * I currently believe the conflict algorithm to be: 2442 * For Open with Read Access and Deny None 2443 * - there is a conflict iff a different client has a write delegation 2444 * For Open with other Write Access or any Deny except None 2445 * - there is a conflict if a different client has any delegation 2446 * - there is a conflict if the same client has a read delegation 2447 * (The current concensus is that this last case should be 2448 * considered a conflict since the client with a read delegation 2449 * could have done an Open with ReadAccess and WriteDeny 2450 * locally and then not have checked for the WriteDeny.) 2451 */ 2452 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2453 stp = LIST_FIRST(&lfp->lf_deleg); 2454 while (stp != LIST_END(&lfp->lf_deleg)) { 2455 nstp = LIST_NEXT(stp, ls_file); 2456 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2457 writedeleg = 0; 2458 else 2459 delegate = 0; 2460 if ((readonly && stp->ls_clp != clp && 2461 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2462 (!readonly && (stp->ls_clp != clp || 2463 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2464 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2465 delegate = 2; 2466 } else { 2467 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2468 if (ret) { 2469 /* 2470 * nfsrv_delegconflict() unlocks state 2471 * when it returns non-zero. 2472 */ 2473 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2474 free((caddr_t)new_open, M_NFSDSTATE); 2475 free((caddr_t)new_deleg, M_NFSDSTATE); 2476 if (ret == -1) { 2477 openstp = NULL; 2478 goto tryagain; 2479 } 2480 error = ret; 2481 goto out; 2482 } 2483 } 2484 } 2485 stp = nstp; 2486 } 2487 } 2488 2489 /* 2490 * We only get here if there was no open that conflicted. 2491 * If an open for the owner exists, or in the access/deny bits. 2492 * Otherwise it is a new open. If the open_owner hasn't been 2493 * confirmed, replace the open with the new one needing confirmation, 2494 * otherwise add the open. 2495 */ 2496 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2497 /* 2498 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2499 * a match. If found, just move the old delegation to the current 2500 * delegation list and issue open. If not found, return 2501 * NFSERR_EXPIRED. 2502 */ 2503 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2504 if (stp->ls_lfp == lfp) { 2505 /* Found it */ 2506 if (stp->ls_clp != clp) 2507 panic("olddeleg clp"); 2508 LIST_REMOVE(stp, ls_list); 2509 LIST_REMOVE(stp, ls_hash); 2510 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2511 stp->ls_stateid.seqid = delegstateidp->seqid = 0; 2512 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2513 clp->lc_clientid.lval[0]; 2514 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2515 clp->lc_clientid.lval[1]; 2516 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2517 nfsrv_nextstateindex(clp); 2518 stp->ls_compref = nd->nd_compref; 2519 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2520 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2521 stp->ls_stateid), stp, ls_hash); 2522 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2523 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2524 else 2525 *rflagsp |= NFSV4OPEN_READDELEGATE; 2526 clp->lc_delegtime = NFSD_MONOSEC + 2527 nfsrv_lease + NFSRV_LEASEDELTA; 2528 2529 /* 2530 * Now, do the associated open. 2531 */ 2532 new_open->ls_stateid.seqid = 0; 2533 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2534 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2535 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2536 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2537 NFSLCK_OPEN; 2538 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2539 new_open->ls_flags |= (NFSLCK_READACCESS | 2540 NFSLCK_WRITEACCESS); 2541 else 2542 new_open->ls_flags |= NFSLCK_READACCESS; 2543 new_open->ls_uid = new_stp->ls_uid; 2544 new_open->ls_lfp = lfp; 2545 new_open->ls_clp = clp; 2546 LIST_INIT(&new_open->ls_open); 2547 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2548 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2549 new_open, ls_hash); 2550 /* 2551 * and handle the open owner 2552 */ 2553 if (ownerstp) { 2554 new_open->ls_openowner = ownerstp; 2555 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 2556 } else { 2557 new_open->ls_openowner = new_stp; 2558 new_stp->ls_flags = 0; 2559 nfsrvd_refcache(new_stp->ls_op); 2560 new_stp->ls_noopens = 0; 2561 LIST_INIT(&new_stp->ls_open); 2562 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2563 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2564 *new_stpp = NULL; 2565 newnfsstats.srvopenowners++; 2566 nfsrv_openpluslock++; 2567 } 2568 openstp = new_open; 2569 new_open = NULL; 2570 newnfsstats.srvopens++; 2571 nfsrv_openpluslock++; 2572 break; 2573 } 2574 } 2575 if (stp == LIST_END(&clp->lc_olddeleg)) 2576 error = NFSERR_EXPIRED; 2577 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2578 /* 2579 * Scan to see that no delegation for this client and file 2580 * doesn't already exist. 2581 * There also shouldn't yet be an Open for this file and 2582 * openowner. 2583 */ 2584 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2585 if (stp->ls_clp == clp) 2586 break; 2587 } 2588 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 2589 /* 2590 * This is the Claim_Previous case with a delegation 2591 * type != Delegate_None. 2592 */ 2593 /* 2594 * First, add the delegation. (Although we must issue the 2595 * delegation, we can also ask for an immediate return.) 2596 */ 2597 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 0; 2598 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 2599 clp->lc_clientid.lval[0]; 2600 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 2601 clp->lc_clientid.lval[1]; 2602 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 2603 nfsrv_nextstateindex(clp); 2604 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 2605 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2606 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2607 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2608 } else { 2609 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2610 NFSLCK_READACCESS); 2611 *rflagsp |= NFSV4OPEN_READDELEGATE; 2612 } 2613 new_deleg->ls_uid = new_stp->ls_uid; 2614 new_deleg->ls_lfp = lfp; 2615 new_deleg->ls_clp = clp; 2616 new_deleg->ls_filerev = filerev; 2617 new_deleg->ls_compref = nd->nd_compref; 2618 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2619 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2620 new_deleg->ls_stateid), new_deleg, ls_hash); 2621 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2622 new_deleg = NULL; 2623 if (delegate == 2 || nfsrv_issuedelegs == 0 || 2624 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 2625 LCL_CALLBACKSON || 2626 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 2627 !NFSVNO_DELEGOK(vp)) 2628 *rflagsp |= NFSV4OPEN_RECALL; 2629 newnfsstats.srvdelegates++; 2630 nfsrv_openpluslock++; 2631 nfsrv_delegatecnt++; 2632 2633 /* 2634 * Now, do the associated open. 2635 */ 2636 new_open->ls_stateid.seqid = 0; 2637 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2638 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2639 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2640 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 2641 NFSLCK_OPEN; 2642 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 2643 new_open->ls_flags |= (NFSLCK_READACCESS | 2644 NFSLCK_WRITEACCESS); 2645 else 2646 new_open->ls_flags |= NFSLCK_READACCESS; 2647 new_open->ls_uid = new_stp->ls_uid; 2648 new_open->ls_lfp = lfp; 2649 new_open->ls_clp = clp; 2650 LIST_INIT(&new_open->ls_open); 2651 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2652 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2653 new_open, ls_hash); 2654 /* 2655 * and handle the open owner 2656 */ 2657 if (ownerstp) { 2658 new_open->ls_openowner = ownerstp; 2659 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2660 } else { 2661 new_open->ls_openowner = new_stp; 2662 new_stp->ls_flags = 0; 2663 nfsrvd_refcache(new_stp->ls_op); 2664 new_stp->ls_noopens = 0; 2665 LIST_INIT(&new_stp->ls_open); 2666 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2667 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2668 *new_stpp = NULL; 2669 newnfsstats.srvopenowners++; 2670 nfsrv_openpluslock++; 2671 } 2672 openstp = new_open; 2673 new_open = NULL; 2674 newnfsstats.srvopens++; 2675 nfsrv_openpluslock++; 2676 } else { 2677 error = NFSERR_RECLAIMCONFLICT; 2678 } 2679 } else if (ownerstp) { 2680 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 2681 /* Replace the open */ 2682 if (ownerstp->ls_op) 2683 nfsrvd_derefcache(ownerstp->ls_op); 2684 ownerstp->ls_op = new_stp->ls_op; 2685 nfsrvd_refcache(ownerstp->ls_op); 2686 ownerstp->ls_seq = new_stp->ls_seq; 2687 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 2688 stp = LIST_FIRST(&ownerstp->ls_open); 2689 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 2690 NFSLCK_OPEN; 2691 stp->ls_stateid.seqid = 0; 2692 stp->ls_uid = new_stp->ls_uid; 2693 if (lfp != stp->ls_lfp) { 2694 LIST_REMOVE(stp, ls_file); 2695 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 2696 stp->ls_lfp = lfp; 2697 } 2698 openstp = stp; 2699 } else if (openstp) { 2700 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 2701 openstp->ls_stateid.seqid++; 2702 2703 /* 2704 * This is where we can choose to issue a delegation. 2705 */ 2706 if (delegate && nfsrv_issuedelegs && 2707 writedeleg && !NFSVNO_EXRDONLY(exp) && 2708 (nfsrv_writedelegifpos || !readonly) && 2709 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 2710 LCL_CALLBACKSON && 2711 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 2712 NFSVNO_DELEGOK(vp)) { 2713 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 0; 2714 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 2715 = clp->lc_clientid.lval[0]; 2716 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 2717 = clp->lc_clientid.lval[1]; 2718 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 2719 = nfsrv_nextstateindex(clp); 2720 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2721 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2722 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2723 new_deleg->ls_uid = new_stp->ls_uid; 2724 new_deleg->ls_lfp = lfp; 2725 new_deleg->ls_clp = clp; 2726 new_deleg->ls_filerev = filerev; 2727 new_deleg->ls_compref = nd->nd_compref; 2728 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2729 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2730 new_deleg->ls_stateid), new_deleg, ls_hash); 2731 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2732 new_deleg = NULL; 2733 newnfsstats.srvdelegates++; 2734 nfsrv_openpluslock++; 2735 nfsrv_delegatecnt++; 2736 } 2737 } else { 2738 new_open->ls_stateid.seqid = 0; 2739 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2740 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2741 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2742 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 2743 NFSLCK_OPEN; 2744 new_open->ls_uid = new_stp->ls_uid; 2745 new_open->ls_openowner = ownerstp; 2746 new_open->ls_lfp = lfp; 2747 new_open->ls_clp = clp; 2748 LIST_INIT(&new_open->ls_open); 2749 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2750 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2751 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2752 new_open, ls_hash); 2753 openstp = new_open; 2754 new_open = NULL; 2755 newnfsstats.srvopens++; 2756 nfsrv_openpluslock++; 2757 2758 /* 2759 * This is where we can choose to issue a delegation. 2760 */ 2761 if (delegate && nfsrv_issuedelegs && 2762 (writedeleg || readonly) && 2763 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 2764 LCL_CALLBACKSON && 2765 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 2766 NFSVNO_DELEGOK(vp)) { 2767 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 0; 2768 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 2769 = clp->lc_clientid.lval[0]; 2770 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 2771 = clp->lc_clientid.lval[1]; 2772 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 2773 = nfsrv_nextstateindex(clp); 2774 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 2775 (nfsrv_writedelegifpos || !readonly)) { 2776 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2777 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2778 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2779 } else { 2780 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2781 NFSLCK_READACCESS); 2782 *rflagsp |= NFSV4OPEN_READDELEGATE; 2783 } 2784 new_deleg->ls_uid = new_stp->ls_uid; 2785 new_deleg->ls_lfp = lfp; 2786 new_deleg->ls_clp = clp; 2787 new_deleg->ls_filerev = filerev; 2788 new_deleg->ls_compref = nd->nd_compref; 2789 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2790 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2791 new_deleg->ls_stateid), new_deleg, ls_hash); 2792 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2793 new_deleg = NULL; 2794 newnfsstats.srvdelegates++; 2795 nfsrv_openpluslock++; 2796 nfsrv_delegatecnt++; 2797 } 2798 } 2799 } else { 2800 /* 2801 * New owner case. Start the open_owner sequence with a 2802 * Needs confirmation (unless a reclaim) and hang the 2803 * new open off it. 2804 */ 2805 new_open->ls_stateid.seqid = 0; 2806 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2807 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2808 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2809 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 2810 NFSLCK_OPEN; 2811 new_open->ls_uid = new_stp->ls_uid; 2812 LIST_INIT(&new_open->ls_open); 2813 new_open->ls_openowner = new_stp; 2814 new_open->ls_lfp = lfp; 2815 new_open->ls_clp = clp; 2816 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2817 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2818 new_stp->ls_flags = 0; 2819 } else { 2820 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 2821 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 2822 } 2823 nfsrvd_refcache(new_stp->ls_op); 2824 new_stp->ls_noopens = 0; 2825 LIST_INIT(&new_stp->ls_open); 2826 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2827 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2828 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2829 new_open, ls_hash); 2830 openstp = new_open; 2831 new_open = NULL; 2832 *new_stpp = NULL; 2833 newnfsstats.srvopens++; 2834 nfsrv_openpluslock++; 2835 newnfsstats.srvopenowners++; 2836 nfsrv_openpluslock++; 2837 } 2838 if (!error) { 2839 stateidp->seqid = openstp->ls_stateid.seqid; 2840 stateidp->other[0] = openstp->ls_stateid.other[0]; 2841 stateidp->other[1] = openstp->ls_stateid.other[1]; 2842 stateidp->other[2] = openstp->ls_stateid.other[2]; 2843 } 2844 NFSUNLOCKSTATE(); 2845 if (haslock) { 2846 NFSLOCKV4ROOTMUTEX(); 2847 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2848 NFSUNLOCKV4ROOTMUTEX(); 2849 } 2850 if (new_open) 2851 FREE((caddr_t)new_open, M_NFSDSTATE); 2852 if (new_deleg) 2853 FREE((caddr_t)new_deleg, M_NFSDSTATE); 2854 2855 out: 2856 NFSEXITCODE2(error, nd); 2857 return (error); 2858 } 2859 2860 /* 2861 * Open update. Does the confirm, downgrade and close. 2862 */ 2863 APPLESTATIC int 2864 nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 2865 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p) 2866 { 2867 struct nfsstate *stp, *ownerstp; 2868 struct nfsclient *clp; 2869 struct nfslockfile *lfp; 2870 u_int32_t bits; 2871 int error = 0, gotstate = 0, len = 0; 2872 u_char client[NFSV4_OPAQUELIMIT]; 2873 2874 /* 2875 * Check for restart conditions (client and server). 2876 */ 2877 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2878 &new_stp->ls_stateid, 0); 2879 if (error) 2880 goto out; 2881 2882 NFSLOCKSTATE(); 2883 /* 2884 * Get the open structure via clientid and stateid. 2885 */ 2886 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 2887 (nfsquad_t)((u_quad_t)0), NULL, p); 2888 if (!error) 2889 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 2890 new_stp->ls_flags, &stp); 2891 2892 /* 2893 * Sanity check the open. 2894 */ 2895 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 2896 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 2897 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 2898 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 2899 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 2900 error = NFSERR_BADSTATEID; 2901 2902 if (!error) 2903 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 2904 stp->ls_openowner, new_stp->ls_op); 2905 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 2906 !(new_stp->ls_flags & NFSLCK_CONFIRM)) 2907 error = NFSERR_OLDSTATEID; 2908 if (!error && vnode_vtype(vp) != VREG) { 2909 if (vnode_vtype(vp) == VDIR) 2910 error = NFSERR_ISDIR; 2911 else 2912 error = NFSERR_INVAL; 2913 } 2914 2915 if (error) { 2916 /* 2917 * If a client tries to confirm an Open with a bad 2918 * seqid# and there are no byte range locks or other Opens 2919 * on the openowner, just throw it away, so the next use of the 2920 * openowner will start a fresh seq#. 2921 */ 2922 if (error == NFSERR_BADSEQID && 2923 (new_stp->ls_flags & NFSLCK_CONFIRM) && 2924 nfsrv_nootherstate(stp)) 2925 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 2926 NFSUNLOCKSTATE(); 2927 goto out; 2928 } 2929 2930 /* 2931 * Set the return stateid. 2932 */ 2933 stateidp->seqid = stp->ls_stateid.seqid + 1; 2934 stateidp->other[0] = stp->ls_stateid.other[0]; 2935 stateidp->other[1] = stp->ls_stateid.other[1]; 2936 stateidp->other[2] = stp->ls_stateid.other[2]; 2937 /* 2938 * Now, handle the three cases. 2939 */ 2940 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 2941 /* 2942 * If the open doesn't need confirmation, it seems to me that 2943 * there is a client error, but I'll just log it and keep going? 2944 */ 2945 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 2946 printf("Nfsv4d: stray open confirm\n"); 2947 stp->ls_openowner->ls_flags = 0; 2948 stp->ls_stateid.seqid++; 2949 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 2950 clp->lc_flags |= LCL_STAMPEDSTABLE; 2951 len = clp->lc_idlen; 2952 NFSBCOPY(clp->lc_id, client, len); 2953 gotstate = 1; 2954 } 2955 NFSUNLOCKSTATE(); 2956 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 2957 ownerstp = stp->ls_openowner; 2958 lfp = stp->ls_lfp; 2959 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 2960 /* Get the lf lock */ 2961 nfsrv_locklf(lfp); 2962 NFSUNLOCKSTATE(); 2963 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 2964 NFSLOCKSTATE(); 2965 nfsrv_unlocklf(lfp); 2966 NFSUNLOCKSTATE(); 2967 } 2968 } else { 2969 (void) nfsrv_freeopen(stp, NULL, 0, p); 2970 NFSUNLOCKSTATE(); 2971 } 2972 } else { 2973 /* 2974 * Update the share bits, making sure that the new set are a 2975 * subset of the old ones. 2976 */ 2977 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 2978 if (~(stp->ls_flags) & bits) { 2979 NFSUNLOCKSTATE(); 2980 error = NFSERR_INVAL; 2981 goto out; 2982 } 2983 stp->ls_flags = (bits | NFSLCK_OPEN); 2984 stp->ls_stateid.seqid++; 2985 NFSUNLOCKSTATE(); 2986 } 2987 2988 /* 2989 * If the client just confirmed its first open, write a timestamp 2990 * to the stable storage file. 2991 */ 2992 if (gotstate != 0) { 2993 nfsrv_writestable(client, len, NFSNST_NEWSTATE, p); 2994 nfsrv_backupstable(); 2995 } 2996 2997 out: 2998 NFSEXITCODE2(error, nd); 2999 return (error); 3000 } 3001 3002 /* 3003 * Delegation update. Does the purge and return. 3004 */ 3005 APPLESTATIC int 3006 nfsrv_delegupdate(nfsquad_t clientid, nfsv4stateid_t *stateidp, 3007 vnode_t vp, int op, struct ucred *cred, NFSPROC_T *p) 3008 { 3009 struct nfsstate *stp; 3010 struct nfsclient *clp; 3011 int error = 0; 3012 fhandle_t fh; 3013 3014 /* 3015 * Do a sanity check against the file handle for DelegReturn. 3016 */ 3017 if (vp) { 3018 error = nfsvno_getfh(vp, &fh, p); 3019 if (error) 3020 goto out; 3021 } 3022 /* 3023 * Check for restart conditions (client and server). 3024 */ 3025 if (op == NFSV4OP_DELEGRETURN) 3026 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3027 stateidp, 0); 3028 else 3029 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3030 stateidp, 0); 3031 3032 NFSLOCKSTATE(); 3033 /* 3034 * Get the open structure via clientid and stateid. 3035 */ 3036 if (!error) 3037 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 3038 (nfsquad_t)((u_quad_t)0), NULL, p); 3039 if (error) { 3040 if (error == NFSERR_CBPATHDOWN) 3041 error = 0; 3042 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3043 error = NFSERR_STALESTATEID; 3044 } 3045 if (!error && op == NFSV4OP_DELEGRETURN) { 3046 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3047 if (!error && stp->ls_stateid.seqid != stateidp->seqid) 3048 error = NFSERR_OLDSTATEID; 3049 } 3050 /* 3051 * NFSERR_EXPIRED means that the state has gone away, 3052 * so Delegations have been purged. Just return ok. 3053 */ 3054 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3055 NFSUNLOCKSTATE(); 3056 error = 0; 3057 goto out; 3058 } 3059 if (error) { 3060 NFSUNLOCKSTATE(); 3061 goto out; 3062 } 3063 3064 if (op == NFSV4OP_DELEGRETURN) { 3065 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3066 sizeof (fhandle_t))) { 3067 NFSUNLOCKSTATE(); 3068 error = NFSERR_BADSTATEID; 3069 goto out; 3070 } 3071 nfsrv_freedeleg(stp); 3072 } else { 3073 nfsrv_freedeleglist(&clp->lc_olddeleg); 3074 } 3075 NFSUNLOCKSTATE(); 3076 error = 0; 3077 3078 out: 3079 NFSEXITCODE(error); 3080 return (error); 3081 } 3082 3083 /* 3084 * Release lock owner. 3085 */ 3086 APPLESTATIC int 3087 nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3088 NFSPROC_T *p) 3089 { 3090 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3091 struct nfsclient *clp; 3092 int error = 0; 3093 3094 /* 3095 * Check for restart conditions (client and server). 3096 */ 3097 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3098 &new_stp->ls_stateid, 0); 3099 if (error) 3100 goto out; 3101 3102 NFSLOCKSTATE(); 3103 /* 3104 * Get the lock owner by name. 3105 */ 3106 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, 3107 (nfsquad_t)((u_quad_t)0), NULL, p); 3108 if (error) { 3109 NFSUNLOCKSTATE(); 3110 goto out; 3111 } 3112 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3113 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3114 stp = LIST_FIRST(&openstp->ls_open); 3115 while (stp != LIST_END(&openstp->ls_open)) { 3116 nstp = LIST_NEXT(stp, ls_list); 3117 /* 3118 * If the owner matches, check for locks and 3119 * then free or return an error. 3120 */ 3121 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3122 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3123 stp->ls_ownerlen)){ 3124 if (LIST_EMPTY(&stp->ls_lock)) { 3125 nfsrv_freelockowner(stp, NULL, 0, p); 3126 } else { 3127 NFSUNLOCKSTATE(); 3128 error = NFSERR_LOCKSHELD; 3129 goto out; 3130 } 3131 } 3132 stp = nstp; 3133 } 3134 } 3135 } 3136 NFSUNLOCKSTATE(); 3137 3138 out: 3139 NFSEXITCODE(error); 3140 return (error); 3141 } 3142 3143 /* 3144 * Get the file handle for a lock structure. 3145 */ 3146 static int 3147 nfsrv_getlockfh(vnode_t vp, u_short flags, 3148 struct nfslockfile **new_lfpp, fhandle_t *nfhp, NFSPROC_T *p) 3149 { 3150 fhandle_t *fhp = NULL; 3151 struct nfslockfile *new_lfp; 3152 int error; 3153 3154 /* 3155 * For lock, use the new nfslock structure, otherwise just 3156 * a fhandle_t on the stack. 3157 */ 3158 if (flags & NFSLCK_OPEN) { 3159 new_lfp = *new_lfpp; 3160 fhp = &new_lfp->lf_fh; 3161 } else if (nfhp) { 3162 fhp = nfhp; 3163 } else { 3164 panic("nfsrv_getlockfh"); 3165 } 3166 error = nfsvno_getfh(vp, fhp, p); 3167 NFSEXITCODE(error); 3168 return (error); 3169 } 3170 3171 /* 3172 * Get an nfs lock structure. Allocate one, as required, and return a 3173 * pointer to it. 3174 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3175 */ 3176 static int 3177 nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3178 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3179 { 3180 struct nfslockfile *lfp; 3181 fhandle_t *fhp = NULL, *tfhp; 3182 struct nfslockhashhead *hp; 3183 struct nfslockfile *new_lfp = NULL; 3184 3185 /* 3186 * For lock, use the new nfslock structure, otherwise just 3187 * a fhandle_t on the stack. 3188 */ 3189 if (flags & NFSLCK_OPEN) { 3190 new_lfp = *new_lfpp; 3191 fhp = &new_lfp->lf_fh; 3192 } else if (nfhp) { 3193 fhp = nfhp; 3194 } else { 3195 panic("nfsrv_getlockfile"); 3196 } 3197 3198 hp = NFSLOCKHASH(fhp); 3199 LIST_FOREACH(lfp, hp, lf_hash) { 3200 tfhp = &lfp->lf_fh; 3201 if (NFSVNO_CMPFH(fhp, tfhp)) { 3202 if (lockit) 3203 nfsrv_locklf(lfp); 3204 *lfpp = lfp; 3205 return (0); 3206 } 3207 } 3208 if (!(flags & NFSLCK_OPEN)) 3209 return (-1); 3210 3211 /* 3212 * No match, so chain the new one into the list. 3213 */ 3214 LIST_INIT(&new_lfp->lf_open); 3215 LIST_INIT(&new_lfp->lf_lock); 3216 LIST_INIT(&new_lfp->lf_deleg); 3217 LIST_INIT(&new_lfp->lf_locallock); 3218 LIST_INIT(&new_lfp->lf_rollback); 3219 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3220 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3221 new_lfp->lf_usecount = 0; 3222 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3223 *lfpp = new_lfp; 3224 *new_lfpp = NULL; 3225 return (0); 3226 } 3227 3228 /* 3229 * This function adds a nfslock lock structure to the list for the associated 3230 * nfsstate and nfslockfile structures. It will be inserted after the 3231 * entry pointed at by insert_lop. 3232 */ 3233 static void 3234 nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3235 struct nfsstate *stp, struct nfslockfile *lfp) 3236 { 3237 struct nfslock *lop, *nlop; 3238 3239 new_lop->lo_stp = stp; 3240 new_lop->lo_lfp = lfp; 3241 3242 if (stp != NULL) { 3243 /* Insert in increasing lo_first order */ 3244 lop = LIST_FIRST(&lfp->lf_lock); 3245 if (lop == LIST_END(&lfp->lf_lock) || 3246 new_lop->lo_first <= lop->lo_first) { 3247 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3248 } else { 3249 nlop = LIST_NEXT(lop, lo_lckfile); 3250 while (nlop != LIST_END(&lfp->lf_lock) && 3251 nlop->lo_first < new_lop->lo_first) { 3252 lop = nlop; 3253 nlop = LIST_NEXT(lop, lo_lckfile); 3254 } 3255 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3256 } 3257 } else { 3258 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3259 } 3260 3261 /* 3262 * Insert after insert_lop, which is overloaded as stp or lfp for 3263 * an empty list. 3264 */ 3265 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3266 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3267 else if ((struct nfsstate *)insert_lop == stp) 3268 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3269 else 3270 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3271 if (stp != NULL) { 3272 newnfsstats.srvlocks++; 3273 nfsrv_openpluslock++; 3274 } 3275 } 3276 3277 /* 3278 * This function updates the locking for a lock owner and given file. It 3279 * maintains a list of lock ranges ordered on increasing file offset that 3280 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3281 * It always adds new_lop to the list and sometimes uses the one pointed 3282 * at by other_lopp. 3283 */ 3284 static void 3285 nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3286 struct nfslock **other_lopp, struct nfslockfile *lfp) 3287 { 3288 struct nfslock *new_lop = *new_lopp; 3289 struct nfslock *lop, *tlop, *ilop; 3290 struct nfslock *other_lop = *other_lopp; 3291 int unlock = 0, myfile = 0; 3292 u_int64_t tmp; 3293 3294 /* 3295 * Work down the list until the lock is merged. 3296 */ 3297 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3298 unlock = 1; 3299 if (stp != NULL) { 3300 ilop = (struct nfslock *)stp; 3301 lop = LIST_FIRST(&stp->ls_lock); 3302 } else { 3303 ilop = (struct nfslock *)lfp; 3304 lop = LIST_FIRST(&lfp->lf_locallock); 3305 } 3306 while (lop != NULL) { 3307 /* 3308 * Only check locks for this file that aren't before the start of 3309 * new lock's range. 3310 */ 3311 if (lop->lo_lfp == lfp) { 3312 myfile = 1; 3313 if (lop->lo_end >= new_lop->lo_first) { 3314 if (new_lop->lo_end < lop->lo_first) { 3315 /* 3316 * If the new lock ends before the start of the 3317 * current lock's range, no merge, just insert 3318 * the new lock. 3319 */ 3320 break; 3321 } 3322 if (new_lop->lo_flags == lop->lo_flags || 3323 (new_lop->lo_first <= lop->lo_first && 3324 new_lop->lo_end >= lop->lo_end)) { 3325 /* 3326 * This lock can be absorbed by the new lock/unlock. 3327 * This happens when it covers the entire range 3328 * of the old lock or is contiguous 3329 * with the old lock and is of the same type or an 3330 * unlock. 3331 */ 3332 if (lop->lo_first < new_lop->lo_first) 3333 new_lop->lo_first = lop->lo_first; 3334 if (lop->lo_end > new_lop->lo_end) 3335 new_lop->lo_end = lop->lo_end; 3336 tlop = lop; 3337 lop = LIST_NEXT(lop, lo_lckowner); 3338 nfsrv_freenfslock(tlop); 3339 continue; 3340 } 3341 3342 /* 3343 * All these cases are for contiguous locks that are not the 3344 * same type, so they can't be merged. 3345 */ 3346 if (new_lop->lo_first <= lop->lo_first) { 3347 /* 3348 * This case is where the new lock overlaps with the 3349 * first part of the old lock. Move the start of the 3350 * old lock to just past the end of the new lock. The 3351 * new lock will be inserted in front of the old, since 3352 * ilop hasn't been updated. (We are done now.) 3353 */ 3354 lop->lo_first = new_lop->lo_end; 3355 break; 3356 } 3357 if (new_lop->lo_end >= lop->lo_end) { 3358 /* 3359 * This case is where the new lock overlaps with the 3360 * end of the old lock's range. Move the old lock's 3361 * end to just before the new lock's first and insert 3362 * the new lock after the old lock. 3363 * Might not be done yet, since the new lock could 3364 * overlap further locks with higher ranges. 3365 */ 3366 lop->lo_end = new_lop->lo_first; 3367 ilop = lop; 3368 lop = LIST_NEXT(lop, lo_lckowner); 3369 continue; 3370 } 3371 /* 3372 * The final case is where the new lock's range is in the 3373 * middle of the current lock's and splits the current lock 3374 * up. Use *other_lopp to handle the second part of the 3375 * split old lock range. (We are done now.) 3376 * For unlock, we use new_lop as other_lop and tmp, since 3377 * other_lop and new_lop are the same for this case. 3378 * We noted the unlock case above, so we don't need 3379 * new_lop->lo_flags any longer. 3380 */ 3381 tmp = new_lop->lo_first; 3382 if (other_lop == NULL) { 3383 if (!unlock) 3384 panic("nfsd srv update unlock"); 3385 other_lop = new_lop; 3386 *new_lopp = NULL; 3387 } 3388 other_lop->lo_first = new_lop->lo_end; 3389 other_lop->lo_end = lop->lo_end; 3390 other_lop->lo_flags = lop->lo_flags; 3391 other_lop->lo_stp = stp; 3392 other_lop->lo_lfp = lfp; 3393 lop->lo_end = tmp; 3394 nfsrv_insertlock(other_lop, lop, stp, lfp); 3395 *other_lopp = NULL; 3396 ilop = lop; 3397 break; 3398 } 3399 } 3400 ilop = lop; 3401 lop = LIST_NEXT(lop, lo_lckowner); 3402 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3403 break; 3404 } 3405 3406 /* 3407 * Insert the new lock in the list at the appropriate place. 3408 */ 3409 if (!unlock) { 3410 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3411 *new_lopp = NULL; 3412 } 3413 } 3414 3415 /* 3416 * This function handles sequencing of locks, etc. 3417 * It returns an error that indicates what the caller should do. 3418 */ 3419 static int 3420 nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3421 struct nfsstate *stp, struct nfsrvcache *op) 3422 { 3423 int error = 0; 3424 3425 if (op != nd->nd_rp) 3426 panic("nfsrvstate checkseqid"); 3427 if (!(op->rc_flag & RC_INPROG)) 3428 panic("nfsrvstate not inprog"); 3429 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3430 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3431 panic("nfsrvstate op refcnt"); 3432 } 3433 if ((stp->ls_seq + 1) == seqid) { 3434 if (stp->ls_op) 3435 nfsrvd_derefcache(stp->ls_op); 3436 stp->ls_op = op; 3437 nfsrvd_refcache(op); 3438 stp->ls_seq = seqid; 3439 goto out; 3440 } else if (stp->ls_seq == seqid && stp->ls_op && 3441 op->rc_xid == stp->ls_op->rc_xid && 3442 op->rc_refcnt == 0 && 3443 op->rc_reqlen == stp->ls_op->rc_reqlen && 3444 op->rc_cksum == stp->ls_op->rc_cksum) { 3445 if (stp->ls_op->rc_flag & RC_INPROG) { 3446 error = NFSERR_DONTREPLY; 3447 goto out; 3448 } 3449 nd->nd_rp = stp->ls_op; 3450 nd->nd_rp->rc_flag |= RC_INPROG; 3451 nfsrvd_delcache(op); 3452 error = NFSERR_REPLYFROMCACHE; 3453 goto out; 3454 } 3455 error = NFSERR_BADSEQID; 3456 3457 out: 3458 NFSEXITCODE2(error, nd); 3459 return (error); 3460 } 3461 3462 /* 3463 * Get the client ip address for callbacks. If the strings can't be parsed, 3464 * just set lc_program to 0 to indicate no callbacks are possible. 3465 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3466 * the address to the client's transport address. This won't be used 3467 * for callbacks, but can be printed out by newnfsstats for info.) 3468 * Return error if the xdr can't be parsed, 0 otherwise. 3469 */ 3470 APPLESTATIC int 3471 nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3472 { 3473 u_int32_t *tl; 3474 u_char *cp, *cp2; 3475 int i, j; 3476 struct sockaddr_in *rad, *sad; 3477 u_char protocol[5], addr[24]; 3478 int error = 0, cantparse = 0; 3479 union { 3480 u_long ival; 3481 u_char cval[4]; 3482 } ip; 3483 union { 3484 u_short sval; 3485 u_char cval[2]; 3486 } port; 3487 3488 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 3489 rad->sin_family = AF_INET; 3490 rad->sin_len = sizeof (struct sockaddr_in); 3491 rad->sin_addr.s_addr = 0; 3492 rad->sin_port = 0; 3493 clp->lc_req.nr_client = NULL; 3494 clp->lc_req.nr_lock = 0; 3495 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3496 i = fxdr_unsigned(int, *tl); 3497 if (i >= 3 && i <= 4) { 3498 error = nfsrv_mtostr(nd, protocol, i); 3499 if (error) 3500 goto nfsmout; 3501 if (!strcmp(protocol, "tcp")) { 3502 clp->lc_flags |= LCL_TCPCALLBACK; 3503 clp->lc_req.nr_sotype = SOCK_STREAM; 3504 clp->lc_req.nr_soproto = IPPROTO_TCP; 3505 } else if (!strcmp(protocol, "udp")) { 3506 clp->lc_req.nr_sotype = SOCK_DGRAM; 3507 clp->lc_req.nr_soproto = IPPROTO_UDP; 3508 } else { 3509 cantparse = 1; 3510 } 3511 } else { 3512 cantparse = 1; 3513 if (i > 0) { 3514 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3515 if (error) 3516 goto nfsmout; 3517 } 3518 } 3519 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3520 i = fxdr_unsigned(int, *tl); 3521 if (i < 0) { 3522 error = NFSERR_BADXDR; 3523 goto nfsmout; 3524 } else if (i == 0) { 3525 cantparse = 1; 3526 } else if (!cantparse && i <= 23 && i >= 11) { 3527 error = nfsrv_mtostr(nd, addr, i); 3528 if (error) 3529 goto nfsmout; 3530 3531 /* 3532 * Parse out the address fields. We expect 6 decimal numbers 3533 * separated by '.'s. 3534 */ 3535 cp = addr; 3536 i = 0; 3537 while (*cp && i < 6) { 3538 cp2 = cp; 3539 while (*cp2 && *cp2 != '.') 3540 cp2++; 3541 if (*cp2) 3542 *cp2++ = '\0'; 3543 else if (i != 5) { 3544 cantparse = 1; 3545 break; 3546 } 3547 j = nfsrv_getipnumber(cp); 3548 if (j >= 0) { 3549 if (i < 4) 3550 ip.cval[3 - i] = j; 3551 else 3552 port.cval[5 - i] = j; 3553 } else { 3554 cantparse = 1; 3555 break; 3556 } 3557 cp = cp2; 3558 i++; 3559 } 3560 if (!cantparse) { 3561 if (ip.ival != 0x0) { 3562 rad->sin_addr.s_addr = htonl(ip.ival); 3563 rad->sin_port = htons(port.sval); 3564 } else { 3565 cantparse = 1; 3566 } 3567 } 3568 } else { 3569 cantparse = 1; 3570 if (i > 0) { 3571 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3572 if (error) 3573 goto nfsmout; 3574 } 3575 } 3576 if (cantparse) { 3577 sad = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3578 rad->sin_addr.s_addr = sad->sin_addr.s_addr; 3579 rad->sin_port = 0x0; 3580 clp->lc_program = 0; 3581 } 3582 nfsmout: 3583 NFSEXITCODE2(error, nd); 3584 return (error); 3585 } 3586 3587 /* 3588 * Turn a string of up to three decimal digits into a number. Return -1 upon 3589 * error. 3590 */ 3591 static int 3592 nfsrv_getipnumber(u_char *cp) 3593 { 3594 int i = 0, j = 0; 3595 3596 while (*cp) { 3597 if (j > 2 || *cp < '0' || *cp > '9') 3598 return (-1); 3599 i *= 10; 3600 i += (*cp - '0'); 3601 cp++; 3602 j++; 3603 } 3604 if (i < 256) 3605 return (i); 3606 return (-1); 3607 } 3608 3609 /* 3610 * This function checks for restart conditions. 3611 */ 3612 static int 3613 nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 3614 nfsv4stateid_t *stateidp, int specialid) 3615 { 3616 int ret = 0; 3617 3618 /* 3619 * First check for a server restart. Open, LockT, ReleaseLockOwner 3620 * and DelegPurge have a clientid, the rest a stateid. 3621 */ 3622 if (flags & 3623 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 3624 if (clientid.lval[0] != nfsrvboottime) { 3625 ret = NFSERR_STALECLIENTID; 3626 goto out; 3627 } 3628 } else if (stateidp->other[0] != nfsrvboottime && 3629 specialid == 0) { 3630 ret = NFSERR_STALESTATEID; 3631 goto out; 3632 } 3633 3634 /* 3635 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 3636 * not use a lock/open owner seqid#, so the check can be done now. 3637 * (The others will be checked, as required, later.) 3638 */ 3639 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 3640 goto out; 3641 3642 NFSLOCKSTATE(); 3643 ret = nfsrv_checkgrace(flags); 3644 NFSUNLOCKSTATE(); 3645 3646 out: 3647 NFSEXITCODE(ret); 3648 return (ret); 3649 } 3650 3651 /* 3652 * Check for grace. 3653 */ 3654 static int 3655 nfsrv_checkgrace(u_int32_t flags) 3656 { 3657 int error = 0; 3658 3659 if (nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) { 3660 if (flags & NFSLCK_RECLAIM) { 3661 error = NFSERR_NOGRACE; 3662 goto out; 3663 } 3664 } else { 3665 if (!(flags & NFSLCK_RECLAIM)) { 3666 error = NFSERR_GRACE; 3667 goto out; 3668 } 3669 3670 /* 3671 * If grace is almost over and we are still getting Reclaims, 3672 * extend grace a bit. 3673 */ 3674 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 3675 nfsrv_stablefirst.nsf_eograce) 3676 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 3677 NFSRV_LEASEDELTA; 3678 } 3679 3680 out: 3681 NFSEXITCODE(error); 3682 return (error); 3683 } 3684 3685 /* 3686 * Do a server callback. 3687 */ 3688 static int 3689 nfsrv_docallback(struct nfsclient *clp, int procnum, 3690 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 3691 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 3692 { 3693 mbuf_t m; 3694 u_int32_t *tl; 3695 struct nfsrv_descript nfsd, *nd = &nfsd; 3696 struct ucred *cred; 3697 int error = 0; 3698 u_int32_t callback; 3699 3700 cred = newnfs_getcred(); 3701 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 3702 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 3703 NFSUNLOCKSTATE(); 3704 panic("docallb"); 3705 } 3706 clp->lc_cbref++; 3707 3708 /* 3709 * Fill the callback program# and version into the request 3710 * structure for newnfs_connect() to use. 3711 */ 3712 clp->lc_req.nr_prog = clp->lc_program; 3713 clp->lc_req.nr_vers = NFSV4_CBVERS; 3714 3715 /* 3716 * First, fill in some of the fields of nd and cr. 3717 */ 3718 nd->nd_flag = ND_NFSV4; 3719 if (clp->lc_flags & LCL_GSS) 3720 nd->nd_flag |= ND_KERBV; 3721 nd->nd_repstat = 0; 3722 cred->cr_uid = clp->lc_uid; 3723 cred->cr_gid = clp->lc_gid; 3724 callback = clp->lc_callback; 3725 NFSUNLOCKSTATE(); 3726 cred->cr_ngroups = 1; 3727 3728 /* 3729 * Get the first mbuf for the request. 3730 */ 3731 MGET(m, M_WAITOK, MT_DATA); 3732 mbuf_setlen(m, 0); 3733 nd->nd_mreq = nd->nd_mb = m; 3734 nd->nd_bpos = NFSMTOD(m, caddr_t); 3735 3736 /* 3737 * and build the callback request. 3738 */ 3739 if (procnum == NFSV4OP_CBGETATTR) { 3740 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 3741 (void) nfsm_strtom(nd, "CB Getattr", 10); 3742 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 3743 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 3744 *tl++ = txdr_unsigned(callback); 3745 *tl++ = txdr_unsigned(1); 3746 *tl = txdr_unsigned(NFSV4OP_CBGETATTR); 3747 (void) nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 3748 (void) nfsrv_putattrbit(nd, attrbitp); 3749 } else if (procnum == NFSV4OP_CBRECALL) { 3750 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 3751 (void) nfsm_strtom(nd, "CB Recall", 9); 3752 NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED + NFSX_STATEID); 3753 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 3754 *tl++ = txdr_unsigned(callback); 3755 *tl++ = txdr_unsigned(1); 3756 *tl++ = txdr_unsigned(NFSV4OP_CBRECALL); 3757 *tl++ = txdr_unsigned(stateidp->seqid); 3758 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 3759 NFSX_STATEIDOTHER); 3760 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 3761 if (trunc) 3762 *tl = newnfs_true; 3763 else 3764 *tl = newnfs_false; 3765 (void) nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 3766 } else { 3767 nd->nd_procnum = NFSV4PROC_CBNULL; 3768 } 3769 3770 /* 3771 * Call newnfs_connect(), as required, and then newnfs_request(). 3772 */ 3773 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 3774 if (clp->lc_req.nr_client == NULL) { 3775 if (nd->nd_procnum == NFSV4PROC_CBNULL) 3776 error = newnfs_connect(NULL, &clp->lc_req, cred, 3777 NULL, 1); 3778 else 3779 error = newnfs_connect(NULL, &clp->lc_req, cred, 3780 NULL, 3); 3781 } 3782 newnfs_sndunlock(&clp->lc_req.nr_lock); 3783 if (!error) { 3784 error = newnfs_request(nd, NULL, clp, &clp->lc_req, NULL, 3785 NULL, cred, clp->lc_program, NFSV4_CBVERS, NULL, 1, NULL, 3786 NULL); 3787 } 3788 NFSFREECRED(cred); 3789 3790 /* 3791 * If error is set here, the Callback path isn't working 3792 * properly, so twiddle the appropriate LCL_ flags. 3793 * (nd_repstat != 0 indicates the Callback path is working, 3794 * but the callback failed on the client.) 3795 */ 3796 if (error) { 3797 /* 3798 * Mark the callback pathway down, which disabled issuing 3799 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 3800 */ 3801 NFSLOCKSTATE(); 3802 clp->lc_flags |= LCL_CBDOWN; 3803 NFSUNLOCKSTATE(); 3804 } else { 3805 /* 3806 * Callback worked. If the callback path was down, disable 3807 * callbacks, so no more delegations will be issued. (This 3808 * is done on the assumption that the callback pathway is 3809 * flakey.) 3810 */ 3811 NFSLOCKSTATE(); 3812 if (clp->lc_flags & LCL_CBDOWN) 3813 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 3814 NFSUNLOCKSTATE(); 3815 if (nd->nd_repstat) 3816 error = nd->nd_repstat; 3817 else if (procnum == NFSV4OP_CBGETATTR) 3818 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 3819 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 3820 p, NULL); 3821 mbuf_freem(nd->nd_mrep); 3822 } 3823 NFSLOCKSTATE(); 3824 clp->lc_cbref--; 3825 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 3826 clp->lc_flags &= ~LCL_WAKEUPWANTED; 3827 wakeup(clp); 3828 } 3829 NFSUNLOCKSTATE(); 3830 3831 NFSEXITCODE(error); 3832 return (error); 3833 } 3834 3835 /* 3836 * Return the next index# for a clientid. Mostly just increment and return 3837 * the next one, but... if the 32bit unsigned does actually wrap around, 3838 * it should be rebooted. 3839 * At an average rate of one new client per second, it will wrap around in 3840 * approximately 136 years. (I think the server will have been shut 3841 * down or rebooted before then.) 3842 */ 3843 static u_int32_t 3844 nfsrv_nextclientindex(void) 3845 { 3846 static u_int32_t client_index = 0; 3847 3848 client_index++; 3849 if (client_index != 0) 3850 return (client_index); 3851 3852 printf("%s: out of clientids\n", __func__); 3853 return (client_index); 3854 } 3855 3856 /* 3857 * Return the next index# for a stateid. Mostly just increment and return 3858 * the next one, but... if the 32bit unsigned does actually wrap around 3859 * (will a BSD server stay up that long?), find 3860 * new start and end values. 3861 */ 3862 static u_int32_t 3863 nfsrv_nextstateindex(struct nfsclient *clp) 3864 { 3865 struct nfsstate *stp; 3866 int i; 3867 u_int32_t canuse, min_index, max_index; 3868 3869 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 3870 clp->lc_stateindex++; 3871 if (clp->lc_stateindex != clp->lc_statemaxindex) 3872 return (clp->lc_stateindex); 3873 } 3874 3875 /* 3876 * Yuck, we've hit the end. 3877 * Look for a new min and max. 3878 */ 3879 min_index = 0; 3880 max_index = 0xffffffff; 3881 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 3882 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 3883 if (stp->ls_stateid.other[2] > 0x80000000) { 3884 if (stp->ls_stateid.other[2] < max_index) 3885 max_index = stp->ls_stateid.other[2]; 3886 } else { 3887 if (stp->ls_stateid.other[2] > min_index) 3888 min_index = stp->ls_stateid.other[2]; 3889 } 3890 } 3891 } 3892 3893 /* 3894 * Yikes, highly unlikely, but I'll handle it anyhow. 3895 */ 3896 if (min_index == 0x80000000 && max_index == 0x80000001) { 3897 canuse = 0; 3898 /* 3899 * Loop around until we find an unused entry. Return that 3900 * and set LCL_INDEXNOTOK, so the search will continue next time. 3901 * (This is one of those rare cases where a goto is the 3902 * cleanest way to code the loop.) 3903 */ 3904 tryagain: 3905 for (i = 0; i < NFSSTATEHASHSIZE; i++) { 3906 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 3907 if (stp->ls_stateid.other[2] == canuse) { 3908 canuse++; 3909 goto tryagain; 3910 } 3911 } 3912 } 3913 clp->lc_flags |= LCL_INDEXNOTOK; 3914 return (canuse); 3915 } 3916 3917 /* 3918 * Ok to start again from min + 1. 3919 */ 3920 clp->lc_stateindex = min_index + 1; 3921 clp->lc_statemaxindex = max_index; 3922 clp->lc_flags &= ~LCL_INDEXNOTOK; 3923 return (clp->lc_stateindex); 3924 } 3925 3926 /* 3927 * The following functions handle the stable storage file that deals with 3928 * the edge conditions described in RFC3530 Sec. 8.6.3. 3929 * The file is as follows: 3930 * - a single record at the beginning that has the lease time of the 3931 * previous server instance (before the last reboot) and the nfsrvboottime 3932 * values for the previous server boots. 3933 * These previous boot times are used to ensure that the current 3934 * nfsrvboottime does not, somehow, get set to a previous one. 3935 * (This is important so that Stale ClientIDs and StateIDs can 3936 * be recognized.) 3937 * The number of previous nfsvrboottime values preceeds the list. 3938 * - followed by some number of appended records with: 3939 * - client id string 3940 * - flag that indicates it is a record revoking state via lease 3941 * expiration or similar 3942 * OR has successfully acquired state. 3943 * These structures vary in length, with the client string at the end, up 3944 * to NFSV4_OPAQUELIMIT in size. 3945 * 3946 * At the end of the grace period, the file is truncated, the first 3947 * record is rewritten with updated information and any acquired state 3948 * records for successful reclaims of state are written. 3949 * 3950 * Subsequent records are appended when the first state is issued to 3951 * a client and when state is revoked for a client. 3952 * 3953 * When reading the file in, state issued records that come later in 3954 * the file override older ones, since the append log is in cronological order. 3955 * If, for some reason, the file can't be read, the grace period is 3956 * immediately terminated and all reclaims get NFSERR_NOGRACE. 3957 */ 3958 3959 /* 3960 * Read in the stable storage file. Called by nfssvc() before the nfsd 3961 * processes start servicing requests. 3962 */ 3963 APPLESTATIC void 3964 nfsrv_setupstable(NFSPROC_T *p) 3965 { 3966 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 3967 struct nfsrv_stable *sp, *nsp; 3968 struct nfst_rec *tsp; 3969 int error, i, tryagain; 3970 off_t off = 0; 3971 ssize_t aresid, len; 3972 3973 /* 3974 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 3975 * a reboot, so state has not been lost. 3976 */ 3977 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 3978 return; 3979 /* 3980 * Set Grace over just until the file reads successfully. 3981 */ 3982 nfsrvboottime = time_second; 3983 LIST_INIT(&sf->nsf_head); 3984 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 3985 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 3986 if (sf->nsf_fp == NULL) 3987 return; 3988 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 3989 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 3990 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 3991 if (error || aresid || sf->nsf_numboots == 0 || 3992 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 3993 return; 3994 3995 /* 3996 * Now, read in the boottimes. 3997 */ 3998 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 3999 sizeof (time_t), M_TEMP, M_WAITOK); 4000 off = sizeof (struct nfsf_rec); 4001 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4002 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4003 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4004 if (error || aresid) { 4005 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4006 sf->nsf_bootvals = NULL; 4007 return; 4008 } 4009 4010 /* 4011 * Make sure this nfsrvboottime is different from all recorded 4012 * previous ones. 4013 */ 4014 do { 4015 tryagain = 0; 4016 for (i = 0; i < sf->nsf_numboots; i++) { 4017 if (nfsrvboottime == sf->nsf_bootvals[i]) { 4018 nfsrvboottime++; 4019 tryagain = 1; 4020 break; 4021 } 4022 } 4023 } while (tryagain); 4024 4025 sf->nsf_flags |= NFSNSF_OK; 4026 off += (sf->nsf_numboots * sizeof (time_t)); 4027 4028 /* 4029 * Read through the file, building a list of records for grace 4030 * checking. 4031 * Each record is between sizeof (struct nfst_rec) and 4032 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4033 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4034 */ 4035 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4036 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4037 do { 4038 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4039 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4040 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4041 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4042 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4043 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4044 /* 4045 * Yuck, the file has been corrupted, so just return 4046 * after clearing out any restart state, so the grace period 4047 * is over. 4048 */ 4049 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4050 LIST_REMOVE(sp, nst_list); 4051 free((caddr_t)sp, M_TEMP); 4052 } 4053 free((caddr_t)tsp, M_TEMP); 4054 sf->nsf_flags &= ~NFSNSF_OK; 4055 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4056 sf->nsf_bootvals = NULL; 4057 return; 4058 } 4059 if (len > 0) { 4060 off += sizeof (struct nfst_rec) + tsp->len - 1; 4061 /* 4062 * Search the list for a matching client. 4063 */ 4064 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4065 if (tsp->len == sp->nst_len && 4066 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4067 break; 4068 } 4069 if (sp == LIST_END(&sf->nsf_head)) { 4070 sp = (struct nfsrv_stable *)malloc(tsp->len + 4071 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4072 M_WAITOK); 4073 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4074 sizeof (struct nfst_rec) + tsp->len - 1); 4075 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4076 } else { 4077 if (tsp->flag == NFSNST_REVOKE) 4078 sp->nst_flag |= NFSNST_REVOKE; 4079 else 4080 /* 4081 * A subsequent timestamp indicates the client 4082 * did a setclientid/confirm and any previous 4083 * revoke is no longer relevant. 4084 */ 4085 sp->nst_flag &= ~NFSNST_REVOKE; 4086 } 4087 } 4088 } while (len > 0); 4089 free((caddr_t)tsp, M_TEMP); 4090 sf->nsf_flags = NFSNSF_OK; 4091 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4092 NFSRV_LEASEDELTA; 4093 } 4094 4095 /* 4096 * Update the stable storage file, now that the grace period is over. 4097 */ 4098 APPLESTATIC void 4099 nfsrv_updatestable(NFSPROC_T *p) 4100 { 4101 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4102 struct nfsrv_stable *sp, *nsp; 4103 int i; 4104 struct nfsvattr nva; 4105 vnode_t vp; 4106 #if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4107 mount_t mp = NULL; 4108 #endif 4109 int error; 4110 4111 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4112 return; 4113 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4114 /* 4115 * Ok, we need to rewrite the stable storage file. 4116 * - truncate to 0 length 4117 * - write the new first structure 4118 * - loop through the data structures, writing out any that 4119 * have timestamps older than the old boot 4120 */ 4121 if (sf->nsf_bootvals) { 4122 sf->nsf_numboots++; 4123 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4124 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4125 } else { 4126 sf->nsf_numboots = 1; 4127 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4128 M_TEMP, M_WAITOK); 4129 } 4130 sf->nsf_bootvals[0] = nfsrvboottime; 4131 sf->nsf_lease = nfsrv_lease; 4132 NFSVNO_ATTRINIT(&nva); 4133 NFSVNO_SETATTRVAL(&nva, size, 0); 4134 vp = NFSFPVNODE(sf->nsf_fp); 4135 vn_start_write(vp, &mp, V_WAIT); 4136 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4137 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4138 NULL); 4139 NFSVOPUNLOCK(vp, 0); 4140 } else 4141 error = EPERM; 4142 vn_finished_write(mp); 4143 if (!error) 4144 error = NFSD_RDWR(UIO_WRITE, vp, 4145 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4146 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4147 if (!error) 4148 error = NFSD_RDWR(UIO_WRITE, vp, 4149 (caddr_t)sf->nsf_bootvals, 4150 sf->nsf_numboots * sizeof (time_t), 4151 (off_t)(sizeof (struct nfsf_rec)), 4152 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4153 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4154 sf->nsf_bootvals = NULL; 4155 if (error) { 4156 sf->nsf_flags &= ~NFSNSF_OK; 4157 printf("EEK! Can't write NfsV4 stable storage file\n"); 4158 return; 4159 } 4160 sf->nsf_flags |= NFSNSF_OK; 4161 4162 /* 4163 * Loop through the list and write out timestamp records for 4164 * any clients that successfully reclaimed state. 4165 */ 4166 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4167 if (sp->nst_flag & NFSNST_GOTSTATE) { 4168 nfsrv_writestable(sp->nst_client, sp->nst_len, 4169 NFSNST_NEWSTATE, p); 4170 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4171 } 4172 LIST_REMOVE(sp, nst_list); 4173 free((caddr_t)sp, M_TEMP); 4174 } 4175 nfsrv_backupstable(); 4176 } 4177 4178 /* 4179 * Append a record to the stable storage file. 4180 */ 4181 APPLESTATIC void 4182 nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4183 { 4184 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4185 struct nfst_rec *sp; 4186 int error; 4187 4188 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4189 return; 4190 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4191 len - 1, M_TEMP, M_WAITOK); 4192 sp->len = len; 4193 NFSBCOPY(client, sp->client, len); 4194 sp->flag = flag; 4195 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 4196 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 4197 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 4198 free((caddr_t)sp, M_TEMP); 4199 if (error) { 4200 sf->nsf_flags &= ~NFSNSF_OK; 4201 printf("EEK! Can't write NfsV4 stable storage file\n"); 4202 } 4203 } 4204 4205 /* 4206 * This function is called during the grace period to mark a client 4207 * that successfully reclaimed state. 4208 */ 4209 static void 4210 nfsrv_markstable(struct nfsclient *clp) 4211 { 4212 struct nfsrv_stable *sp; 4213 4214 /* 4215 * First find the client structure. 4216 */ 4217 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4218 if (sp->nst_len == clp->lc_idlen && 4219 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4220 break; 4221 } 4222 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4223 return; 4224 4225 /* 4226 * Now, just mark it and set the nfsclient back pointer. 4227 */ 4228 sp->nst_flag |= NFSNST_GOTSTATE; 4229 sp->nst_clp = clp; 4230 } 4231 4232 /* 4233 * This function is called for a reclaim, to see if it gets grace. 4234 * It returns 0 if a reclaim is allowed, 1 otherwise. 4235 */ 4236 static int 4237 nfsrv_checkstable(struct nfsclient *clp) 4238 { 4239 struct nfsrv_stable *sp; 4240 4241 /* 4242 * First, find the entry for the client. 4243 */ 4244 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4245 if (sp->nst_len == clp->lc_idlen && 4246 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4247 break; 4248 } 4249 4250 /* 4251 * If not in the list, state was revoked or no state was issued 4252 * since the previous reboot, a reclaim is denied. 4253 */ 4254 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 4255 (sp->nst_flag & NFSNST_REVOKE) || 4256 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 4257 return (1); 4258 return (0); 4259 } 4260 4261 /* 4262 * Test for and try to clear out a conflicting client. This is called by 4263 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 4264 * a found. 4265 * The trick here is that it can't revoke a conflicting client with an 4266 * expired lease unless it holds the v4root lock, so... 4267 * If no v4root lock, get the lock and return 1 to indicate "try again". 4268 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 4269 * the revocation worked and the conflicting client is "bye, bye", so it 4270 * can be tried again. 4271 * Return 2 to indicate that the vnode is VI_DOOMED after NFSVOPLOCK(). 4272 * Unlocks State before a non-zero value is returned. 4273 */ 4274 static int 4275 nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 4276 NFSPROC_T *p) 4277 { 4278 int gotlock, lktype; 4279 4280 /* 4281 * If lease hasn't expired, we can't fix it. 4282 */ 4283 if (clp->lc_expiry >= NFSD_MONOSEC || 4284 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 4285 return (0); 4286 if (*haslockp == 0) { 4287 NFSUNLOCKSTATE(); 4288 lktype = NFSVOPISLOCKED(vp); 4289 NFSVOPUNLOCK(vp, 0); 4290 NFSLOCKV4ROOTMUTEX(); 4291 nfsv4_relref(&nfsv4rootfs_lock); 4292 do { 4293 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4294 NFSV4ROOTLOCKMUTEXPTR, NULL); 4295 } while (!gotlock); 4296 NFSUNLOCKV4ROOTMUTEX(); 4297 *haslockp = 1; 4298 NFSVOPLOCK(vp, lktype | LK_RETRY); 4299 if ((vp->v_iflag & VI_DOOMED) != 0) 4300 return (2); 4301 else 4302 return (1); 4303 } 4304 NFSUNLOCKSTATE(); 4305 4306 /* 4307 * Ok, we can expire the conflicting client. 4308 */ 4309 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4310 nfsrv_backupstable(); 4311 nfsrv_cleanclient(clp, p); 4312 nfsrv_freedeleglist(&clp->lc_deleg); 4313 nfsrv_freedeleglist(&clp->lc_olddeleg); 4314 LIST_REMOVE(clp, lc_hash); 4315 nfsrv_zapclient(clp, p); 4316 return (1); 4317 } 4318 4319 /* 4320 * Resolve a delegation conflict. 4321 * Returns 0 to indicate the conflict was resolved without sleeping. 4322 * Return -1 to indicate that the caller should check for conflicts again. 4323 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 4324 * 4325 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 4326 * for a return of 0, since there was no sleep and it could be required 4327 * later. It is released for a return of NFSERR_DELAY, since the caller 4328 * will return that error. It is released when a sleep was done waiting 4329 * for the delegation to be returned or expire (so that other nfsds can 4330 * handle ops). Then, it must be acquired for the write to stable storage. 4331 * (This function is somewhat similar to nfsrv_clientconflict(), but 4332 * the semantics differ in a couple of subtle ways. The return of 0 4333 * indicates the conflict was resolved without sleeping here, not 4334 * that the conflict can't be resolved and the handling of nfsv4root_lock 4335 * differs, as noted above.) 4336 * Unlocks State before returning a non-zero value. 4337 */ 4338 static int 4339 nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 4340 vnode_t vp) 4341 { 4342 struct nfsclient *clp = stp->ls_clp; 4343 int gotlock, error, lktype, retrycnt, zapped_clp; 4344 nfsv4stateid_t tstateid; 4345 fhandle_t tfh; 4346 4347 /* 4348 * If the conflict is with an old delegation... 4349 */ 4350 if (stp->ls_flags & NFSLCK_OLDDELEG) { 4351 /* 4352 * You can delete it, if it has expired. 4353 */ 4354 if (clp->lc_delegtime < NFSD_MONOSEC) { 4355 nfsrv_freedeleg(stp); 4356 NFSUNLOCKSTATE(); 4357 error = -1; 4358 goto out; 4359 } 4360 NFSUNLOCKSTATE(); 4361 /* 4362 * During this delay, the old delegation could expire or it 4363 * could be recovered by the client via an Open with 4364 * CLAIM_DELEGATE_PREV. 4365 * Release the nfsv4root_lock, if held. 4366 */ 4367 if (*haslockp) { 4368 *haslockp = 0; 4369 NFSLOCKV4ROOTMUTEX(); 4370 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4371 NFSUNLOCKV4ROOTMUTEX(); 4372 } 4373 error = NFSERR_DELAY; 4374 goto out; 4375 } 4376 4377 /* 4378 * It's a current delegation, so: 4379 * - check to see if the delegation has expired 4380 * - if so, get the v4root lock and then expire it 4381 */ 4382 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 4383 /* 4384 * - do a recall callback, since not yet done 4385 * For now, never allow truncate to be set. To use 4386 * truncate safely, it must be guaranteed that the 4387 * Remove, Rename or Setattr with size of 0 will 4388 * succeed and that would require major changes to 4389 * the VFS/Vnode OPs. 4390 * Set the expiry time large enough so that it won't expire 4391 * until after the callback, then set it correctly, once 4392 * the callback is done. (The delegation will now time 4393 * out whether or not the Recall worked ok. The timeout 4394 * will be extended when ops are done on the delegation 4395 * stateid, up to the timelimit.) 4396 */ 4397 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 4398 NFSRV_LEASEDELTA; 4399 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 4400 NFSRV_LEASEDELTA; 4401 stp->ls_flags |= NFSLCK_DELEGRECALL; 4402 4403 /* 4404 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 4405 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 4406 * in order to try and avoid a race that could happen 4407 * when a CBRecall request passed the Open reply with 4408 * the delegation in it when transitting the network. 4409 * Since nfsrv_docallback will sleep, don't use stp after 4410 * the call. 4411 */ 4412 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 4413 sizeof (tstateid)); 4414 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 4415 sizeof (tfh)); 4416 NFSUNLOCKSTATE(); 4417 if (*haslockp) { 4418 *haslockp = 0; 4419 NFSLOCKV4ROOTMUTEX(); 4420 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4421 NFSUNLOCKV4ROOTMUTEX(); 4422 } 4423 retrycnt = 0; 4424 do { 4425 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 4426 &tstateid, 0, &tfh, NULL, NULL, p); 4427 retrycnt++; 4428 } while ((error == NFSERR_BADSTATEID || 4429 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 4430 error = NFSERR_DELAY; 4431 goto out; 4432 } 4433 4434 if (clp->lc_expiry >= NFSD_MONOSEC && 4435 stp->ls_delegtime >= NFSD_MONOSEC) { 4436 NFSUNLOCKSTATE(); 4437 /* 4438 * A recall has been done, but it has not yet expired. 4439 * So, RETURN_DELAY. 4440 */ 4441 if (*haslockp) { 4442 *haslockp = 0; 4443 NFSLOCKV4ROOTMUTEX(); 4444 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4445 NFSUNLOCKV4ROOTMUTEX(); 4446 } 4447 error = NFSERR_DELAY; 4448 goto out; 4449 } 4450 4451 /* 4452 * If we don't yet have the lock, just get it and then return, 4453 * since we need that before deleting expired state, such as 4454 * this delegation. 4455 * When getting the lock, unlock the vnode, so other nfsds that 4456 * are in progress, won't get stuck waiting for the vnode lock. 4457 */ 4458 if (*haslockp == 0) { 4459 NFSUNLOCKSTATE(); 4460 lktype = NFSVOPISLOCKED(vp); 4461 NFSVOPUNLOCK(vp, 0); 4462 NFSLOCKV4ROOTMUTEX(); 4463 nfsv4_relref(&nfsv4rootfs_lock); 4464 do { 4465 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4466 NFSV4ROOTLOCKMUTEXPTR, NULL); 4467 } while (!gotlock); 4468 NFSUNLOCKV4ROOTMUTEX(); 4469 *haslockp = 1; 4470 NFSVOPLOCK(vp, lktype | LK_RETRY); 4471 if ((vp->v_iflag & VI_DOOMED) != 0) { 4472 *haslockp = 0; 4473 NFSLOCKV4ROOTMUTEX(); 4474 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4475 NFSUNLOCKV4ROOTMUTEX(); 4476 error = NFSERR_PERM; 4477 goto out; 4478 } 4479 error = -1; 4480 goto out; 4481 } 4482 4483 NFSUNLOCKSTATE(); 4484 /* 4485 * Ok, we can delete the expired delegation. 4486 * First, write the Revoke record to stable storage and then 4487 * clear out the conflict. 4488 * Since all other nfsd threads are now blocked, we can safely 4489 * sleep without the state changing. 4490 */ 4491 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4492 nfsrv_backupstable(); 4493 if (clp->lc_expiry < NFSD_MONOSEC) { 4494 nfsrv_cleanclient(clp, p); 4495 nfsrv_freedeleglist(&clp->lc_deleg); 4496 nfsrv_freedeleglist(&clp->lc_olddeleg); 4497 LIST_REMOVE(clp, lc_hash); 4498 zapped_clp = 1; 4499 } else { 4500 nfsrv_freedeleg(stp); 4501 zapped_clp = 0; 4502 } 4503 if (zapped_clp) 4504 nfsrv_zapclient(clp, p); 4505 error = -1; 4506 4507 out: 4508 NFSEXITCODE(error); 4509 return (error); 4510 } 4511 4512 /* 4513 * Check for a remove allowed, if remove is set to 1 and get rid of 4514 * delegations. 4515 */ 4516 APPLESTATIC int 4517 nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p) 4518 { 4519 struct nfsstate *stp; 4520 struct nfslockfile *lfp; 4521 int error, haslock = 0; 4522 fhandle_t nfh; 4523 4524 /* 4525 * First, get the lock file structure. 4526 * (A return of -1 means no associated state, so remove ok.) 4527 */ 4528 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 4529 tryagain: 4530 NFSLOCKSTATE(); 4531 if (!error) 4532 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 4533 if (error) { 4534 NFSUNLOCKSTATE(); 4535 if (haslock) { 4536 NFSLOCKV4ROOTMUTEX(); 4537 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4538 NFSUNLOCKV4ROOTMUTEX(); 4539 } 4540 if (error == -1) 4541 error = 0; 4542 goto out; 4543 } 4544 4545 /* 4546 * Now, we must Recall any delegations. 4547 */ 4548 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p); 4549 if (error) { 4550 /* 4551 * nfsrv_cleandeleg() unlocks state for non-zero 4552 * return. 4553 */ 4554 if (error == -1) 4555 goto tryagain; 4556 if (haslock) { 4557 NFSLOCKV4ROOTMUTEX(); 4558 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4559 NFSUNLOCKV4ROOTMUTEX(); 4560 } 4561 goto out; 4562 } 4563 4564 /* 4565 * Now, look for a conflicting open share. 4566 */ 4567 if (remove) { 4568 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 4569 if (stp->ls_flags & NFSLCK_WRITEDENY) { 4570 error = NFSERR_FILEOPEN; 4571 break; 4572 } 4573 } 4574 } 4575 4576 NFSUNLOCKSTATE(); 4577 if (haslock) { 4578 NFSLOCKV4ROOTMUTEX(); 4579 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4580 NFSUNLOCKV4ROOTMUTEX(); 4581 } 4582 4583 out: 4584 NFSEXITCODE(error); 4585 return (error); 4586 } 4587 4588 /* 4589 * Clear out all delegations for the file referred to by lfp. 4590 * May return NFSERR_DELAY, if there will be a delay waiting for 4591 * delegations to expire. 4592 * Returns -1 to indicate it slept while recalling a delegation. 4593 * This function has the side effect of deleting the nfslockfile structure, 4594 * if it no longer has associated state and didn't have to sleep. 4595 * Unlocks State before a non-zero value is returned. 4596 */ 4597 static int 4598 nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 4599 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 4600 { 4601 struct nfsstate *stp, *nstp; 4602 int ret = 0; 4603 4604 stp = LIST_FIRST(&lfp->lf_deleg); 4605 while (stp != LIST_END(&lfp->lf_deleg)) { 4606 nstp = LIST_NEXT(stp, ls_file); 4607 if (stp->ls_clp != clp) { 4608 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 4609 if (ret) { 4610 /* 4611 * nfsrv_delegconflict() unlocks state 4612 * when it returns non-zero. 4613 */ 4614 goto out; 4615 } 4616 } 4617 stp = nstp; 4618 } 4619 out: 4620 NFSEXITCODE(ret); 4621 return (ret); 4622 } 4623 4624 /* 4625 * There are certain operations that, when being done outside of NFSv4, 4626 * require that any NFSv4 delegation for the file be recalled. 4627 * This function is to be called for those cases: 4628 * VOP_RENAME() - When a delegation is being recalled for any reason, 4629 * the client may have to do Opens against the server, using the file's 4630 * final component name. If the file has been renamed on the server, 4631 * that component name will be incorrect and the Open will fail. 4632 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 4633 * been removed on the server, if there is a delegation issued to 4634 * that client for the file. I say "theoretically" since clients 4635 * normally do an Access Op before the Open and that Access Op will 4636 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 4637 * they will detect the file's removal in the same manner. (There is 4638 * one case where RFC3530 allows a client to do an Open without first 4639 * doing an Access Op, which is passage of a check against the ACE 4640 * returned with a Write delegation, but current practice is to ignore 4641 * the ACE and always do an Access Op.) 4642 * Since the functions can only be called with an unlocked vnode, this 4643 * can't be done at this time. 4644 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 4645 * locks locally in the client, which are not visible to the server. To 4646 * deal with this, issuing of delegations for a vnode must be disabled 4647 * and all delegations for the vnode recalled. This is done via the 4648 * second function, using the VV_DISABLEDELEG vflag on the vnode. 4649 */ 4650 APPLESTATIC void 4651 nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 4652 { 4653 time_t starttime; 4654 int error; 4655 4656 /* 4657 * First, check to see if the server is currently running and it has 4658 * been called for a regular file when issuing delegations. 4659 */ 4660 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 4661 nfsrv_issuedelegs == 0) 4662 return; 4663 4664 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 4665 /* 4666 * First, get a reference on the nfsv4rootfs_lock so that an 4667 * exclusive lock cannot be acquired by another thread. 4668 */ 4669 NFSLOCKV4ROOTMUTEX(); 4670 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 4671 NFSUNLOCKV4ROOTMUTEX(); 4672 4673 /* 4674 * Now, call nfsrv_checkremove() in a loop while it returns 4675 * NFSERR_DELAY. Return upon any other error or when timed out. 4676 */ 4677 starttime = NFSD_MONOSEC; 4678 do { 4679 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4680 error = nfsrv_checkremove(vp, 0, p); 4681 NFSVOPUNLOCK(vp, 0); 4682 } else 4683 error = EPERM; 4684 if (error == NFSERR_DELAY) { 4685 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 4686 break; 4687 /* Sleep for a short period of time */ 4688 (void) nfs_catnap(PZERO, 0, "nfsremove"); 4689 } 4690 } while (error == NFSERR_DELAY); 4691 NFSLOCKV4ROOTMUTEX(); 4692 nfsv4_relref(&nfsv4rootfs_lock); 4693 NFSUNLOCKV4ROOTMUTEX(); 4694 } 4695 4696 APPLESTATIC void 4697 nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 4698 { 4699 4700 #ifdef VV_DISABLEDELEG 4701 /* 4702 * First, flag issuance of delegations disabled. 4703 */ 4704 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 4705 #endif 4706 4707 /* 4708 * Then call nfsd_recalldelegation() to get rid of all extant 4709 * delegations. 4710 */ 4711 nfsd_recalldelegation(vp, p); 4712 } 4713 4714 /* 4715 * Check for conflicting locks, etc. and then get rid of delegations. 4716 * (At one point I thought that I should get rid of delegations for any 4717 * Setattr, since it could potentially disallow the I/O op (read or write) 4718 * allowed by the delegation. However, Setattr Ops that aren't changing 4719 * the size get a stateid of all 0s, so you can't tell if it is a delegation 4720 * for the same client or a different one, so I decided to only get rid 4721 * of delegations for other clients when the size is being changed.) 4722 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 4723 * as Write backs, even if there is no delegation, so it really isn't any 4724 * different?) 4725 */ 4726 APPLESTATIC int 4727 nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 4728 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 4729 struct nfsexstuff *exp, NFSPROC_T *p) 4730 { 4731 struct nfsstate st, *stp = &st; 4732 struct nfslock lo, *lop = &lo; 4733 int error = 0; 4734 nfsquad_t clientid; 4735 4736 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 4737 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 4738 lop->lo_first = nvap->na_size; 4739 } else { 4740 stp->ls_flags = 0; 4741 lop->lo_first = 0; 4742 } 4743 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 4744 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 4745 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 4746 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 4747 stp->ls_flags |= NFSLCK_SETATTR; 4748 if (stp->ls_flags == 0) 4749 goto out; 4750 lop->lo_end = NFS64BITSSET; 4751 lop->lo_flags = NFSLCK_WRITE; 4752 stp->ls_ownerlen = 0; 4753 stp->ls_op = NULL; 4754 stp->ls_uid = nd->nd_cred->cr_uid; 4755 stp->ls_stateid.seqid = stateidp->seqid; 4756 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 4757 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 4758 stp->ls_stateid.other[2] = stateidp->other[2]; 4759 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 4760 stateidp, exp, nd, p); 4761 4762 out: 4763 NFSEXITCODE2(error, nd); 4764 return (error); 4765 } 4766 4767 /* 4768 * Check for a write delegation and do a CBGETATTR if there is one, updating 4769 * the attributes, as required. 4770 * Should I return an error if I can't get the attributes? (For now, I'll 4771 * just return ok. 4772 */ 4773 APPLESTATIC int 4774 nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 4775 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, struct ucred *cred, 4776 NFSPROC_T *p) 4777 { 4778 struct nfsstate *stp; 4779 struct nfslockfile *lfp; 4780 struct nfsclient *clp; 4781 struct nfsvattr nva; 4782 fhandle_t nfh; 4783 int error = 0; 4784 nfsattrbit_t cbbits; 4785 u_quad_t delegfilerev; 4786 4787 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 4788 if (!NFSNONZERO_ATTRBIT(&cbbits)) 4789 goto out; 4790 4791 /* 4792 * Get the lock file structure. 4793 * (A return of -1 means no associated state, so return ok.) 4794 */ 4795 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 4796 NFSLOCKSTATE(); 4797 if (!error) 4798 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 4799 if (error) { 4800 NFSUNLOCKSTATE(); 4801 if (error == -1) 4802 error = 0; 4803 goto out; 4804 } 4805 4806 /* 4807 * Now, look for a write delegation. 4808 */ 4809 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 4810 if (stp->ls_flags & NFSLCK_DELEGWRITE) 4811 break; 4812 } 4813 if (stp == LIST_END(&lfp->lf_deleg)) { 4814 NFSUNLOCKSTATE(); 4815 goto out; 4816 } 4817 clp = stp->ls_clp; 4818 delegfilerev = stp->ls_filerev; 4819 4820 /* 4821 * If the Write delegation was issued as a part of this Compound RPC 4822 * or if we have an Implied Clientid (used in a previous Op in this 4823 * compound) and it is the client the delegation was issued to, 4824 * just return ok. 4825 * I also assume that it is from the same client iff the network 4826 * host IP address is the same as the callback address. (Not 4827 * exactly correct by the RFC, but avoids a lot of Getattr 4828 * callbacks.) 4829 */ 4830 if (nd->nd_compref == stp->ls_compref || 4831 ((nd->nd_flag & ND_IMPLIEDCLID) && 4832 clp->lc_clientid.qval == nd->nd_clientid.qval) || 4833 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 4834 NFSUNLOCKSTATE(); 4835 goto out; 4836 } 4837 4838 /* 4839 * We are now done with the delegation state structure, 4840 * so the statelock can be released and we can now tsleep(). 4841 */ 4842 4843 /* 4844 * Now, we must do the CB Getattr callback, to see if Change or Size 4845 * has changed. 4846 */ 4847 if (clp->lc_expiry >= NFSD_MONOSEC) { 4848 NFSUNLOCKSTATE(); 4849 NFSVNO_ATTRINIT(&nva); 4850 nva.na_filerev = NFS64BITSSET; 4851 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 4852 0, &nfh, &nva, &cbbits, p); 4853 if (!error) { 4854 if ((nva.na_filerev != NFS64BITSSET && 4855 nva.na_filerev > delegfilerev) || 4856 (NFSVNO_ISSETSIZE(&nva) && 4857 nva.na_size != nvap->na_size)) { 4858 nfsvno_updfilerev(vp, nvap, cred, p); 4859 if (NFSVNO_ISSETSIZE(&nva)) 4860 nvap->na_size = nva.na_size; 4861 } 4862 } 4863 } else { 4864 NFSUNLOCKSTATE(); 4865 } 4866 error = 0; 4867 4868 out: 4869 NFSEXITCODE2(error, nd); 4870 return (error); 4871 } 4872 4873 /* 4874 * This function looks for openowners that haven't had any opens for 4875 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 4876 * is set. 4877 */ 4878 APPLESTATIC void 4879 nfsrv_throwawayopens(NFSPROC_T *p) 4880 { 4881 struct nfsclient *clp, *nclp; 4882 struct nfsstate *stp, *nstp; 4883 int i; 4884 4885 NFSLOCKSTATE(); 4886 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 4887 /* 4888 * For each client... 4889 */ 4890 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 4891 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 4892 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 4893 if (LIST_EMPTY(&stp->ls_open) && 4894 (stp->ls_noopens > NFSNOOPEN || 4895 (nfsrv_openpluslock * 2) > 4896 NFSRV_V4STATELIMIT)) 4897 nfsrv_freeopenowner(stp, 0, p); 4898 } 4899 } 4900 } 4901 NFSUNLOCKSTATE(); 4902 } 4903 4904 /* 4905 * This function checks to see if the credentials are the same. 4906 * Returns 1 for not same, 0 otherwise. 4907 */ 4908 static int 4909 nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 4910 { 4911 4912 if (nd->nd_flag & ND_GSS) { 4913 if (!(clp->lc_flags & LCL_GSS)) 4914 return (1); 4915 if (clp->lc_flags & LCL_NAME) { 4916 if (nd->nd_princlen != clp->lc_namelen || 4917 NFSBCMP(nd->nd_principal, clp->lc_name, 4918 clp->lc_namelen)) 4919 return (1); 4920 else 4921 return (0); 4922 } 4923 if (nd->nd_cred->cr_uid == clp->lc_uid) 4924 return (0); 4925 else 4926 return (1); 4927 } else if (clp->lc_flags & LCL_GSS) 4928 return (1); 4929 /* 4930 * For AUTH_SYS, allow the same uid or root. (This is underspecified 4931 * in RFC3530, which talks about principals, but doesn't say anything 4932 * about uids for AUTH_SYS.) 4933 */ 4934 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 4935 return (0); 4936 else 4937 return (1); 4938 } 4939 4940 /* 4941 * Calculate the lease expiry time. 4942 */ 4943 static time_t 4944 nfsrv_leaseexpiry(void) 4945 { 4946 4947 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 4948 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 4949 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 4950 } 4951 4952 /* 4953 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 4954 */ 4955 static void 4956 nfsrv_delaydelegtimeout(struct nfsstate *stp) 4957 { 4958 4959 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 4960 return; 4961 4962 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 4963 stp->ls_delegtime < stp->ls_delegtimelimit) { 4964 stp->ls_delegtime += nfsrv_lease; 4965 if (stp->ls_delegtime > stp->ls_delegtimelimit) 4966 stp->ls_delegtime = stp->ls_delegtimelimit; 4967 } 4968 } 4969 4970 /* 4971 * This function checks to see if there is any other state associated 4972 * with the openowner for this Open. 4973 * It returns 1 if there is no other state, 0 otherwise. 4974 */ 4975 static int 4976 nfsrv_nootherstate(struct nfsstate *stp) 4977 { 4978 struct nfsstate *tstp; 4979 4980 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 4981 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 4982 return (0); 4983 } 4984 return (1); 4985 } 4986 4987 /* 4988 * Create a list of lock deltas (changes to local byte range locking 4989 * that can be rolled back using the list) and apply the changes via 4990 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 4991 * the rollback or update function will be called after this. 4992 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 4993 * call fails. If it returns an error, it will unlock the list. 4994 */ 4995 static int 4996 nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 4997 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 4998 { 4999 struct nfslock *lop, *nlop; 5000 int error = 0; 5001 5002 /* Loop through the list of locks. */ 5003 lop = LIST_FIRST(&lfp->lf_locallock); 5004 while (first < end && lop != NULL) { 5005 nlop = LIST_NEXT(lop, lo_lckowner); 5006 if (first >= lop->lo_end) { 5007 /* not there yet */ 5008 lop = nlop; 5009 } else if (first < lop->lo_first) { 5010 /* new one starts before entry in list */ 5011 if (end <= lop->lo_first) { 5012 /* no overlap between old and new */ 5013 error = nfsrv_dolocal(vp, lfp, flags, 5014 NFSLCK_UNLOCK, first, end, cfp, p); 5015 if (error != 0) 5016 break; 5017 first = end; 5018 } else { 5019 /* handle fragment overlapped with new one */ 5020 error = nfsrv_dolocal(vp, lfp, flags, 5021 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5022 p); 5023 if (error != 0) 5024 break; 5025 first = lop->lo_first; 5026 } 5027 } else { 5028 /* new one overlaps this entry in list */ 5029 if (end <= lop->lo_end) { 5030 /* overlaps all of new one */ 5031 error = nfsrv_dolocal(vp, lfp, flags, 5032 lop->lo_flags, first, end, cfp, p); 5033 if (error != 0) 5034 break; 5035 first = end; 5036 } else { 5037 /* handle fragment overlapped with new one */ 5038 error = nfsrv_dolocal(vp, lfp, flags, 5039 lop->lo_flags, first, lop->lo_end, cfp, p); 5040 if (error != 0) 5041 break; 5042 first = lop->lo_end; 5043 lop = nlop; 5044 } 5045 } 5046 } 5047 if (first < end && error == 0) 5048 /* handle fragment past end of list */ 5049 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5050 end, cfp, p); 5051 5052 NFSEXITCODE(error); 5053 return (error); 5054 } 5055 5056 /* 5057 * Local lock unlock. Unlock all byte ranges that are no longer locked 5058 * by NFSv4. To do this, unlock any subranges of first-->end that 5059 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5060 * list. This list has all locks for the file held by other 5061 * <clientid, lockowner> tuples. The list is ordered by increasing 5062 * lo_first value, but may have entries that overlap each other, for 5063 * the case of read locks. 5064 */ 5065 static void 5066 nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5067 uint64_t init_end, NFSPROC_T *p) 5068 { 5069 struct nfslock *lop; 5070 uint64_t first, end, prevfirst; 5071 5072 first = init_first; 5073 end = init_end; 5074 while (first < init_end) { 5075 /* Loop through all nfs locks, adjusting first and end */ 5076 prevfirst = 0; 5077 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5078 KASSERT(prevfirst <= lop->lo_first, 5079 ("nfsv4 locks out of order")); 5080 KASSERT(lop->lo_first < lop->lo_end, 5081 ("nfsv4 bogus lock")); 5082 prevfirst = lop->lo_first; 5083 if (first >= lop->lo_first && 5084 first < lop->lo_end) 5085 /* 5086 * Overlaps with initial part, so trim 5087 * off that initial part by moving first past 5088 * it. 5089 */ 5090 first = lop->lo_end; 5091 else if (end > lop->lo_first && 5092 lop->lo_first > first) { 5093 /* 5094 * This lock defines the end of the 5095 * segment to unlock, so set end to the 5096 * start of it and break out of the loop. 5097 */ 5098 end = lop->lo_first; 5099 break; 5100 } 5101 if (first >= end) 5102 /* 5103 * There is no segment left to do, so 5104 * break out of this loop and then exit 5105 * the outer while() since first will be set 5106 * to end, which must equal init_end here. 5107 */ 5108 break; 5109 } 5110 if (first < end) { 5111 /* Unlock this segment */ 5112 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 5113 NFSLCK_READ, first, end, NULL, p); 5114 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 5115 first, end); 5116 } 5117 /* 5118 * Now move past this segment and look for any further 5119 * segment in the range, if there is one. 5120 */ 5121 first = end; 5122 end = init_end; 5123 } 5124 } 5125 5126 /* 5127 * Do the local lock operation and update the rollback list, as required. 5128 * Perform the rollback and return the error if nfsvno_advlock() fails. 5129 */ 5130 static int 5131 nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 5132 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5133 { 5134 struct nfsrollback *rlp; 5135 int error = 0, ltype, oldltype; 5136 5137 if (flags & NFSLCK_WRITE) 5138 ltype = F_WRLCK; 5139 else if (flags & NFSLCK_READ) 5140 ltype = F_RDLCK; 5141 else 5142 ltype = F_UNLCK; 5143 if (oldflags & NFSLCK_WRITE) 5144 oldltype = F_WRLCK; 5145 else if (oldflags & NFSLCK_READ) 5146 oldltype = F_RDLCK; 5147 else 5148 oldltype = F_UNLCK; 5149 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 5150 /* nothing to do */ 5151 goto out; 5152 error = nfsvno_advlock(vp, ltype, first, end, p); 5153 if (error != 0) { 5154 if (cfp != NULL) { 5155 cfp->cl_clientid.lval[0] = 0; 5156 cfp->cl_clientid.lval[1] = 0; 5157 cfp->cl_first = 0; 5158 cfp->cl_end = NFS64BITSSET; 5159 cfp->cl_flags = NFSLCK_WRITE; 5160 cfp->cl_ownerlen = 5; 5161 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 5162 } 5163 nfsrv_locallock_rollback(vp, lfp, p); 5164 } else if (ltype != F_UNLCK) { 5165 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 5166 M_WAITOK); 5167 rlp->rlck_first = first; 5168 rlp->rlck_end = end; 5169 rlp->rlck_type = oldltype; 5170 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 5171 } 5172 5173 out: 5174 NFSEXITCODE(error); 5175 return (error); 5176 } 5177 5178 /* 5179 * Roll back local lock changes and free up the rollback list. 5180 */ 5181 static void 5182 nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 5183 { 5184 struct nfsrollback *rlp, *nrlp; 5185 5186 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 5187 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 5188 rlp->rlck_end, p); 5189 free(rlp, M_NFSDROLLBACK); 5190 } 5191 LIST_INIT(&lfp->lf_rollback); 5192 } 5193 5194 /* 5195 * Update local lock list and delete rollback list (ie now committed to the 5196 * local locks). Most of the work is done by the internal function. 5197 */ 5198 static void 5199 nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 5200 uint64_t end) 5201 { 5202 struct nfsrollback *rlp, *nrlp; 5203 struct nfslock *new_lop, *other_lop; 5204 5205 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 5206 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 5207 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 5208 M_WAITOK); 5209 else 5210 other_lop = NULL; 5211 new_lop->lo_flags = flags; 5212 new_lop->lo_first = first; 5213 new_lop->lo_end = end; 5214 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 5215 if (new_lop != NULL) 5216 free(new_lop, M_NFSDLOCK); 5217 if (other_lop != NULL) 5218 free(other_lop, M_NFSDLOCK); 5219 5220 /* and get rid of the rollback list */ 5221 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 5222 free(rlp, M_NFSDROLLBACK); 5223 LIST_INIT(&lfp->lf_rollback); 5224 } 5225 5226 /* 5227 * Lock the struct nfslockfile for local lock updating. 5228 */ 5229 static void 5230 nfsrv_locklf(struct nfslockfile *lfp) 5231 { 5232 int gotlock; 5233 5234 /* lf_usecount ensures *lfp won't be free'd */ 5235 lfp->lf_usecount++; 5236 do { 5237 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 5238 NFSSTATEMUTEXPTR, NULL); 5239 } while (gotlock == 0); 5240 lfp->lf_usecount--; 5241 } 5242 5243 /* 5244 * Unlock the struct nfslockfile after local lock updating. 5245 */ 5246 static void 5247 nfsrv_unlocklf(struct nfslockfile *lfp) 5248 { 5249 5250 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 5251 } 5252 5253 /* 5254 * Clear out all state for the NFSv4 server. 5255 * Must be called by a thread that can sleep when no nfsds are running. 5256 */ 5257 void 5258 nfsrv_throwawayallstate(NFSPROC_T *p) 5259 { 5260 struct nfsclient *clp, *nclp; 5261 struct nfslockfile *lfp, *nlfp; 5262 int i; 5263 5264 /* 5265 * For each client, clean out the state and then free the structure. 5266 */ 5267 for (i = 0; i < NFSCLIENTHASHSIZE; i++) { 5268 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5269 nfsrv_cleanclient(clp, p); 5270 nfsrv_freedeleglist(&clp->lc_deleg); 5271 nfsrv_freedeleglist(&clp->lc_olddeleg); 5272 free(clp, M_NFSDCLIENT); 5273 } 5274 } 5275 5276 /* 5277 * Also, free up any remaining lock file structures. 5278 */ 5279 for (i = 0; i < NFSLOCKHASHSIZE; i++) { 5280 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) { 5281 printf("nfsd unload: fnd a lock file struct\n"); 5282 nfsrv_freenfslockfile(lfp); 5283 } 5284 } 5285 } 5286 5287
Indexes created Thu Oct 02 14:10:14 GMT 2025