nfs_nfsdstate.c revision 358035
1/*- 2 * Copyright (c) 2009 Rick Macklem, University of Guelph 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/10/sys/fs/nfsserver/nfs_nfsdstate.c 358035 2020-02-17 19:31:34Z rmacklem $"); 30 31#include "opt_inet.h" 32#include "opt_inet6.h" 33#ifndef APPLEKEXT 34#include <fs/nfs/nfsport.h> 35 36struct nfsrv_stablefirst nfsrv_stablefirst; 37int nfsrv_issuedelegs = 0; 38int nfsrv_dolocallocks = 0; 39struct nfsv4lock nfsv4rootfs_lock; 40 41extern int newnfs_numnfsd; 42extern struct nfsstats newnfsstats; 43extern int nfsrv_lease; 44extern struct timeval nfsboottime; 45extern u_int32_t newnfs_true, newnfs_false; 46extern int nfsd_debuglevel; 47NFSV4ROOTLOCKMUTEX; 48NFSSTATESPINLOCK; 49 50SYSCTL_DECL(_vfs_nfsd); 51int nfsrv_statehashsize = NFSSTATEHASHSIZE; 52TUNABLE_INT("vfs.nfsd.statehashsize", &nfsrv_statehashsize); 53SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN, 54 &nfsrv_statehashsize, 0, 55 "Size of state hash table set via loader.conf"); 56 57int nfsrv_clienthashsize = NFSCLIENTHASHSIZE; 58TUNABLE_INT("vfs.nfsd.clienthashsize", &nfsrv_clienthashsize); 59SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN, 60 &nfsrv_clienthashsize, 0, 61 "Size of client hash table set via loader.conf"); 62 63int nfsrv_lockhashsize = NFSLOCKHASHSIZE; 64TUNABLE_INT("vfs.nfsd.fhhashsize", &nfsrv_lockhashsize); 65SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN, 66 &nfsrv_lockhashsize, 0, 67 "Size of file handle hash table set via loader.conf"); 68 69int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE; 70TUNABLE_INT("vfs.nfsd.sessionhashsize", &nfsrv_sessionhashsize); 71SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN, 72 &nfsrv_sessionhashsize, 0, 73 "Size of session hash table set via loader.conf"); 74 75static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT; 76TUNABLE_INT("vfs.nfsd.v4statelimit", &nfsrv_v4statelimit); 77SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN, 78 &nfsrv_v4statelimit, 0, 79 "High water limit for NFSv4 opens+locks+delegations"); 80 81static int nfsrv_writedelegifpos = 0; 82SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW, 83 &nfsrv_writedelegifpos, 0, 84 "Issue a write delegation for read opens if possible"); 85 86static int nfsrv_allowreadforwriteopen = 1; 87SYSCTL_INT(_vfs_nfsd, OID_AUTO, allowreadforwriteopen, CTLFLAG_RW, 88 &nfsrv_allowreadforwriteopen, 0, 89 "Allow Reads to be done with Write Access StateIDs"); 90 91/* 92 * Hash lists for nfs V4. 93 */ 94struct nfsclienthashhead *nfsclienthash; 95struct nfslockhashhead *nfslockhash; 96struct nfssessionhash *nfssessionhash; 97#endif /* !APPLEKEXT */ 98 99static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 100static time_t nfsrvboottime; 101static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 102static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 103static int nfsrv_nogsscallback = 0; 104static volatile int nfsrv_writedelegcnt = 0; 105 106/* local functions */ 107static void nfsrv_dumpaclient(struct nfsclient *clp, 108 struct nfsd_dumpclients *dumpp); 109static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 110 NFSPROC_T *p); 111static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 112 NFSPROC_T *p); 113static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 114 NFSPROC_T *p); 115static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 116 int cansleep, NFSPROC_T *p); 117static void nfsrv_freenfslock(struct nfslock *lop); 118static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 119static void nfsrv_freedeleg(struct nfsstate *); 120static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 121 u_int32_t flags, struct nfsstate **stpp); 122static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 123 struct nfsstate **stpp); 124static int nfsrv_getlockfh(vnode_t vp, u_short flags, 125 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 126static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 127 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 128static void nfsrv_insertlock(struct nfslock *new_lop, 129 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 130static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 131 struct nfslock **other_lopp, struct nfslockfile *lfp); 132static int nfsrv_getipnumber(u_char *cp); 133static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 134 nfsv4stateid_t *stateidp, int specialid); 135static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 136 u_int32_t flags); 137static int nfsrv_docallback(struct nfsclient *clp, int procnum, 138 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 139 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p); 140static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 141 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp); 142static u_int32_t nfsrv_nextclientindex(void); 143static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 144static void nfsrv_markstable(struct nfsclient *clp); 145static void nfsrv_markreclaim(struct nfsclient *clp); 146static int nfsrv_checkstable(struct nfsclient *clp); 147static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 148 vnode *vp, NFSPROC_T *p); 149static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 150 NFSPROC_T *p, vnode_t vp); 151static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 152 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 153static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 154 struct nfsclient *clp); 155static time_t nfsrv_leaseexpiry(void); 156static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 157static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 158 struct nfsstate *stp, struct nfsrvcache *op); 159static int nfsrv_nootherstate(struct nfsstate *stp); 160static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 161 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 162static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 163 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 164static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 165 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 166 NFSPROC_T *p); 167static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 168 NFSPROC_T *p); 169static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 170 uint64_t first, uint64_t end); 171static void nfsrv_locklf(struct nfslockfile *lfp); 172static void nfsrv_unlocklf(struct nfslockfile *lfp); 173static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 174static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid); 175static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 176 int dont_replycache, struct nfsdsession **sepp); 177static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 178 179/* 180 * Scan the client list for a match and either return the current one, 181 * create a new entry or return an error. 182 * If returning a non-error, the clp structure must either be linked into 183 * the client list or free'd. 184 */ 185APPLESTATIC int 186nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 187 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 188{ 189 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 190 int i, error = 0, ret; 191 struct nfsstate *stp, *tstp; 192#ifdef INET 193 struct sockaddr_in *sin, *rin; 194#endif 195#ifdef INET6 196 struct sockaddr_in6 *sin6, *rin6; 197#endif 198 struct nfsdsession *sep, *nsep; 199 int zapit = 0, gotit, hasstate = 0, igotlock; 200 static u_int64_t confirm_index = 0; 201 202 /* 203 * Check for state resource limit exceeded. 204 */ 205 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 206 error = NFSERR_RESOURCE; 207 goto out; 208 } 209 210 if (nfsrv_issuedelegs == 0 || 211 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 212 /* 213 * Don't do callbacks when delegations are disabled or 214 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 215 * If establishing a callback connection is attempted 216 * when a firewall is blocking the callback path, the 217 * server may wait too long for the connect attempt to 218 * succeed during the Open. Some clients, such as Linux, 219 * may timeout and give up on the Open before the server 220 * replies. Also, since AUTH_GSS callbacks are not 221 * yet interoperability tested, they might cause the 222 * server to crap out, if they get past the Init call to 223 * the client. 224 */ 225 new_clp->lc_program = 0; 226 227 /* Lock out other nfsd threads */ 228 NFSLOCKV4ROOTMUTEX(); 229 nfsv4_relref(&nfsv4rootfs_lock); 230 do { 231 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 232 NFSV4ROOTLOCKMUTEXPTR, NULL); 233 } while (!igotlock); 234 NFSUNLOCKV4ROOTMUTEX(); 235 236 /* 237 * Search for a match in the client list. 238 */ 239 gotit = i = 0; 240 while (i < nfsrv_clienthashsize && !gotit) { 241 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 242 if (new_clp->lc_idlen == clp->lc_idlen && 243 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 244 gotit = 1; 245 break; 246 } 247 } 248 if (gotit == 0) 249 i++; 250 } 251 if (!gotit || 252 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 253 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 254 /* 255 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 256 * client is trying to update a confirmed clientid. 257 */ 258 NFSLOCKV4ROOTMUTEX(); 259 nfsv4_unlock(&nfsv4rootfs_lock, 1); 260 NFSUNLOCKV4ROOTMUTEX(); 261 confirmp->lval[1] = 0; 262 error = NFSERR_NOENT; 263 goto out; 264 } 265 /* 266 * Get rid of the old one. 267 */ 268 if (i != nfsrv_clienthashsize) { 269 LIST_REMOVE(clp, lc_hash); 270 nfsrv_cleanclient(clp, p); 271 nfsrv_freedeleglist(&clp->lc_deleg); 272 nfsrv_freedeleglist(&clp->lc_olddeleg); 273 zapit = 1; 274 } 275 /* 276 * Add it after assigning a client id to it. 277 */ 278 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 279 if ((nd->nd_flag & ND_NFSV41) != 0) 280 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 281 ++confirm_index; 282 else 283 confirmp->qval = new_clp->lc_confirm.qval = 284 ++confirm_index; 285 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 286 (u_int32_t)nfsrvboottime; 287 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 288 nfsrv_nextclientindex(); 289 new_clp->lc_stateindex = 0; 290 new_clp->lc_statemaxindex = 0; 291 new_clp->lc_cbref = 0; 292 new_clp->lc_expiry = nfsrv_leaseexpiry(); 293 LIST_INIT(&new_clp->lc_open); 294 LIST_INIT(&new_clp->lc_deleg); 295 LIST_INIT(&new_clp->lc_olddeleg); 296 LIST_INIT(&new_clp->lc_session); 297 for (i = 0; i < nfsrv_statehashsize; i++) 298 LIST_INIT(&new_clp->lc_stateid[i]); 299 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 300 lc_hash); 301 newnfsstats.srvclients++; 302 nfsrv_openpluslock++; 303 nfsrv_clients++; 304 NFSLOCKV4ROOTMUTEX(); 305 nfsv4_unlock(&nfsv4rootfs_lock, 1); 306 NFSUNLOCKV4ROOTMUTEX(); 307 if (zapit) 308 nfsrv_zapclient(clp, p); 309 *new_clpp = NULL; 310 goto out; 311 } 312 313 /* 314 * Now, handle the cases where the id is already issued. 315 */ 316 if (nfsrv_notsamecredname(nd, clp)) { 317 /* 318 * Check to see if there is expired state that should go away. 319 */ 320 if (clp->lc_expiry < NFSD_MONOSEC && 321 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 322 nfsrv_cleanclient(clp, p); 323 nfsrv_freedeleglist(&clp->lc_deleg); 324 } 325 326 /* 327 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 328 * RFC3530 Sec. 8.1.2 last para. 329 */ 330 if (!LIST_EMPTY(&clp->lc_deleg)) { 331 hasstate = 1; 332 } else if (LIST_EMPTY(&clp->lc_open)) { 333 hasstate = 0; 334 } else { 335 hasstate = 0; 336 /* Look for an Open on the OpenOwner */ 337 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 338 if (!LIST_EMPTY(&stp->ls_open)) { 339 hasstate = 1; 340 break; 341 } 342 } 343 } 344 if (hasstate) { 345 /* 346 * If the uid doesn't match, return NFSERR_CLIDINUSE after 347 * filling out the correct ipaddr and portnum. 348 */ 349 switch (clp->lc_req.nr_nam->sa_family) { 350#ifdef INET 351 case AF_INET: 352 sin = (struct sockaddr_in *)new_clp->lc_req.nr_nam; 353 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 354 sin->sin_addr.s_addr = rin->sin_addr.s_addr; 355 sin->sin_port = rin->sin_port; 356 break; 357#endif 358#ifdef INET6 359 case AF_INET6: 360 sin6 = (struct sockaddr_in6 *)new_clp->lc_req.nr_nam; 361 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 362 sin6->sin6_addr = rin6->sin6_addr; 363 sin6->sin6_port = rin6->sin6_port; 364 break; 365#endif 366 } 367 NFSLOCKV4ROOTMUTEX(); 368 nfsv4_unlock(&nfsv4rootfs_lock, 1); 369 NFSUNLOCKV4ROOTMUTEX(); 370 error = NFSERR_CLIDINUSE; 371 goto out; 372 } 373 } 374 375 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 376 /* 377 * If the verifier has changed, the client has rebooted 378 * and a new client id is issued. The old state info 379 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 380 */ 381 LIST_REMOVE(clp, lc_hash); 382 383 /* Get rid of all sessions on this clientid. */ 384 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) { 385 ret = nfsrv_freesession(sep, NULL); 386 if (ret != 0) 387 printf("nfsrv_setclient: verifier changed free" 388 " session failed=%d\n", ret); 389 } 390 391 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 392 if ((nd->nd_flag & ND_NFSV41) != 0) 393 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 394 ++confirm_index; 395 else 396 confirmp->qval = new_clp->lc_confirm.qval = 397 ++confirm_index; 398 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 399 nfsrvboottime; 400 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 401 nfsrv_nextclientindex(); 402 new_clp->lc_stateindex = 0; 403 new_clp->lc_statemaxindex = 0; 404 new_clp->lc_cbref = 0; 405 new_clp->lc_expiry = nfsrv_leaseexpiry(); 406 407 /* 408 * Save the state until confirmed. 409 */ 410 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 411 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 412 tstp->ls_clp = new_clp; 413 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 414 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 415 tstp->ls_clp = new_clp; 416 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 417 ls_list); 418 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 419 tstp->ls_clp = new_clp; 420 for (i = 0; i < nfsrv_statehashsize; i++) { 421 LIST_NEWHEAD(&new_clp->lc_stateid[i], 422 &clp->lc_stateid[i], ls_hash); 423 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 424 tstp->ls_clp = new_clp; 425 } 426 LIST_INIT(&new_clp->lc_session); 427 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 428 lc_hash); 429 newnfsstats.srvclients++; 430 nfsrv_openpluslock++; 431 nfsrv_clients++; 432 NFSLOCKV4ROOTMUTEX(); 433 nfsv4_unlock(&nfsv4rootfs_lock, 1); 434 NFSUNLOCKV4ROOTMUTEX(); 435 436 /* 437 * Must wait until any outstanding callback on the old clp 438 * completes. 439 */ 440 NFSLOCKSTATE(); 441 while (clp->lc_cbref) { 442 clp->lc_flags |= LCL_WAKEUPWANTED; 443 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 444 "nfsd clp", 10 * hz); 445 } 446 NFSUNLOCKSTATE(); 447 nfsrv_zapclient(clp, p); 448 *new_clpp = NULL; 449 goto out; 450 } 451 452 /* For NFSv4.1, mark that we found a confirmed clientid. */ 453 if ((nd->nd_flag & ND_NFSV41) != 0) { 454 clientidp->lval[0] = clp->lc_clientid.lval[0]; 455 clientidp->lval[1] = clp->lc_clientid.lval[1]; 456 confirmp->lval[0] = 0; /* Ignored by client */ 457 confirmp->lval[1] = 1; 458 } else { 459 /* 460 * id and verifier match, so update the net address info 461 * and get rid of any existing callback authentication 462 * handle, so a new one will be acquired. 463 */ 464 LIST_REMOVE(clp, lc_hash); 465 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 466 new_clp->lc_expiry = nfsrv_leaseexpiry(); 467 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 468 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 469 clp->lc_clientid.lval[0]; 470 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 471 clp->lc_clientid.lval[1]; 472 new_clp->lc_delegtime = clp->lc_delegtime; 473 new_clp->lc_stateindex = clp->lc_stateindex; 474 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 475 new_clp->lc_cbref = 0; 476 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 477 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 478 tstp->ls_clp = new_clp; 479 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 480 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 481 tstp->ls_clp = new_clp; 482 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 483 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 484 tstp->ls_clp = new_clp; 485 for (i = 0; i < nfsrv_statehashsize; i++) { 486 LIST_NEWHEAD(&new_clp->lc_stateid[i], 487 &clp->lc_stateid[i], ls_hash); 488 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 489 tstp->ls_clp = new_clp; 490 } 491 LIST_INIT(&new_clp->lc_session); 492 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 493 lc_hash); 494 newnfsstats.srvclients++; 495 nfsrv_openpluslock++; 496 nfsrv_clients++; 497 } 498 NFSLOCKV4ROOTMUTEX(); 499 nfsv4_unlock(&nfsv4rootfs_lock, 1); 500 NFSUNLOCKV4ROOTMUTEX(); 501 502 if ((nd->nd_flag & ND_NFSV41) == 0) { 503 /* 504 * Must wait until any outstanding callback on the old clp 505 * completes. 506 */ 507 NFSLOCKSTATE(); 508 while (clp->lc_cbref) { 509 clp->lc_flags |= LCL_WAKEUPWANTED; 510 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 511 "nfsdclp", 10 * hz); 512 } 513 NFSUNLOCKSTATE(); 514 nfsrv_zapclient(clp, p); 515 *new_clpp = NULL; 516 } 517 518out: 519 NFSEXITCODE2(error, nd); 520 return (error); 521} 522 523/* 524 * Check to see if the client id exists and optionally confirm it. 525 */ 526APPLESTATIC int 527nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 528 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 529 struct nfsrv_descript *nd, NFSPROC_T *p) 530{ 531 struct nfsclient *clp; 532 struct nfsstate *stp; 533 int i; 534 struct nfsclienthashhead *hp; 535 int error = 0, igotlock, doneok; 536 struct nfssessionhash *shp; 537 struct nfsdsession *sep; 538 uint64_t sessid[2]; 539 static uint64_t next_sess = 0; 540 541 if (clpp) 542 *clpp = NULL; 543 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 544 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) { 545 error = NFSERR_STALECLIENTID; 546 goto out; 547 } 548 549 /* 550 * If called with opflags == CLOPS_RENEW, the State Lock is 551 * already held. Otherwise, we need to get either that or, 552 * for the case of Confirm, lock out the nfsd threads. 553 */ 554 if (opflags & CLOPS_CONFIRM) { 555 NFSLOCKV4ROOTMUTEX(); 556 nfsv4_relref(&nfsv4rootfs_lock); 557 do { 558 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 559 NFSV4ROOTLOCKMUTEXPTR, NULL); 560 } while (!igotlock); 561 /* 562 * Create a new sessionid here, since we need to do it where 563 * there is a mutex held to serialize update of next_sess. 564 */ 565 if ((nd->nd_flag & ND_NFSV41) != 0) { 566 sessid[0] = ++next_sess; 567 sessid[1] = clientid.qval; 568 } 569 NFSUNLOCKV4ROOTMUTEX(); 570 } else if (opflags != CLOPS_RENEW) { 571 NFSLOCKSTATE(); 572 } 573 574 /* For NFSv4.1, the clp is acquired from the associated session. */ 575 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 576 opflags == CLOPS_RENEW) { 577 clp = NULL; 578 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 579 shp = NFSSESSIONHASH(nd->nd_sessionid); 580 NFSLOCKSESSION(shp); 581 sep = nfsrv_findsession(nd->nd_sessionid); 582 if (sep != NULL) 583 clp = sep->sess_clp; 584 NFSUNLOCKSESSION(shp); 585 } 586 } else { 587 hp = NFSCLIENTHASH(clientid); 588 LIST_FOREACH(clp, hp, lc_hash) { 589 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 590 break; 591 } 592 } 593 if (clp == NULL) { 594 if (opflags & CLOPS_CONFIRM) 595 error = NFSERR_STALECLIENTID; 596 else 597 error = NFSERR_EXPIRED; 598 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 599 /* 600 * If marked admin revoked, just return the error. 601 */ 602 error = NFSERR_ADMINREVOKED; 603 } 604 if (error) { 605 if (opflags & CLOPS_CONFIRM) { 606 NFSLOCKV4ROOTMUTEX(); 607 nfsv4_unlock(&nfsv4rootfs_lock, 1); 608 NFSUNLOCKV4ROOTMUTEX(); 609 } else if (opflags != CLOPS_RENEW) { 610 NFSUNLOCKSTATE(); 611 } 612 goto out; 613 } 614 615 /* 616 * Perform any operations specified by the opflags. 617 */ 618 if (opflags & CLOPS_CONFIRM) { 619 if (((nd->nd_flag & ND_NFSV41) != 0 && 620 clp->lc_confirm.lval[0] != confirm.lval[0]) || 621 ((nd->nd_flag & ND_NFSV41) == 0 && 622 clp->lc_confirm.qval != confirm.qval)) 623 error = NFSERR_STALECLIENTID; 624 else if (nfsrv_notsamecredname(nd, clp)) 625 error = NFSERR_CLIDINUSE; 626 627 if (!error) { 628 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 629 LCL_NEEDSCONFIRM) { 630 /* 631 * Hang onto the delegations (as old delegations) 632 * for an Open with CLAIM_DELEGATE_PREV unless in 633 * grace, but get rid of the rest of the state. 634 */ 635 nfsrv_cleanclient(clp, p); 636 nfsrv_freedeleglist(&clp->lc_olddeleg); 637 if (nfsrv_checkgrace(nd, clp, 0)) { 638 /* In grace, so just delete delegations */ 639 nfsrv_freedeleglist(&clp->lc_deleg); 640 } else { 641 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 642 stp->ls_flags |= NFSLCK_OLDDELEG; 643 clp->lc_delegtime = NFSD_MONOSEC + 644 nfsrv_lease + NFSRV_LEASEDELTA; 645 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 646 ls_list); 647 } 648 if ((nd->nd_flag & ND_NFSV41) != 0) 649 clp->lc_program = cbprogram; 650 } 651 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 652 if (clp->lc_program) 653 clp->lc_flags |= LCL_NEEDSCBNULL; 654 /* For NFSv4.1, link the session onto the client. */ 655 if (nsep != NULL) { 656 /* Hold a reference on the xprt for a backchannel. */ 657 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 658 != 0) { 659 if (clp->lc_req.nr_client == NULL) 660 clp->lc_req.nr_client = (struct __rpc_client *) 661 clnt_bck_create(nd->nd_xprt->xp_socket, 662 cbprogram, NFSV4_CBVERS); 663 if (clp->lc_req.nr_client != NULL) { 664 SVC_ACQUIRE(nd->nd_xprt); 665 nd->nd_xprt->xp_p2 = 666 clp->lc_req.nr_client->cl_private; 667 /* Disable idle timeout. */ 668 nd->nd_xprt->xp_idletimeout = 0; 669 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 670 } else 671 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 672 } 673 NFSBCOPY(sessid, nsep->sess_sessionid, 674 NFSX_V4SESSIONID); 675 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 676 NFSX_V4SESSIONID); 677 shp = NFSSESSIONHASH(nsep->sess_sessionid); 678 NFSLOCKSTATE(); 679 NFSLOCKSESSION(shp); 680 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 681 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 682 nsep->sess_clp = clp; 683 NFSUNLOCKSESSION(shp); 684 NFSUNLOCKSTATE(); 685 } 686 } 687 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 688 error = NFSERR_EXPIRED; 689 } 690 691 /* 692 * If called by the Renew Op, we must check the principal. 693 */ 694 if (!error && (opflags & CLOPS_RENEWOP)) { 695 if (nfsrv_notsamecredname(nd, clp)) { 696 doneok = 0; 697 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) { 698 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 699 if ((stp->ls_flags & NFSLCK_OPEN) && 700 stp->ls_uid == nd->nd_cred->cr_uid) { 701 doneok = 1; 702 break; 703 } 704 } 705 } 706 if (!doneok) 707 error = NFSERR_ACCES; 708 } 709 if (!error && (clp->lc_flags & LCL_CBDOWN)) 710 error = NFSERR_CBPATHDOWN; 711 } 712 if ((!error || error == NFSERR_CBPATHDOWN) && 713 (opflags & CLOPS_RENEW)) { 714 clp->lc_expiry = nfsrv_leaseexpiry(); 715 } 716 if (opflags & CLOPS_CONFIRM) { 717 NFSLOCKV4ROOTMUTEX(); 718 nfsv4_unlock(&nfsv4rootfs_lock, 1); 719 NFSUNLOCKV4ROOTMUTEX(); 720 } else if (opflags != CLOPS_RENEW) { 721 NFSUNLOCKSTATE(); 722 } 723 if (clpp) 724 *clpp = clp; 725 726out: 727 NFSEXITCODE2(error, nd); 728 return (error); 729} 730 731/* 732 * Perform the NFSv4.1 destroy clientid. 733 */ 734int 735nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p) 736{ 737 struct nfsclient *clp; 738 struct nfsclienthashhead *hp; 739 int error = 0, i, igotlock; 740 741 if (nfsrvboottime != clientid.lval[0]) { 742 error = NFSERR_STALECLIENTID; 743 goto out; 744 } 745 746 /* Lock out other nfsd threads */ 747 NFSLOCKV4ROOTMUTEX(); 748 nfsv4_relref(&nfsv4rootfs_lock); 749 do { 750 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 751 NFSV4ROOTLOCKMUTEXPTR, NULL); 752 } while (igotlock == 0); 753 NFSUNLOCKV4ROOTMUTEX(); 754 755 hp = NFSCLIENTHASH(clientid); 756 LIST_FOREACH(clp, hp, lc_hash) { 757 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 758 break; 759 } 760 if (clp == NULL) { 761 NFSLOCKV4ROOTMUTEX(); 762 nfsv4_unlock(&nfsv4rootfs_lock, 1); 763 NFSUNLOCKV4ROOTMUTEX(); 764 /* Just return ok, since it is gone. */ 765 goto out; 766 } 767 768 /* Scan for state on the clientid. */ 769 for (i = 0; i < nfsrv_statehashsize; i++) 770 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 771 NFSLOCKV4ROOTMUTEX(); 772 nfsv4_unlock(&nfsv4rootfs_lock, 1); 773 NFSUNLOCKV4ROOTMUTEX(); 774 error = NFSERR_CLIENTIDBUSY; 775 goto out; 776 } 777 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 778 NFSLOCKV4ROOTMUTEX(); 779 nfsv4_unlock(&nfsv4rootfs_lock, 1); 780 NFSUNLOCKV4ROOTMUTEX(); 781 error = NFSERR_CLIENTIDBUSY; 782 goto out; 783 } 784 785 /* Destroy the clientid and return ok. */ 786 nfsrv_cleanclient(clp, p); 787 nfsrv_freedeleglist(&clp->lc_deleg); 788 nfsrv_freedeleglist(&clp->lc_olddeleg); 789 LIST_REMOVE(clp, lc_hash); 790 NFSLOCKV4ROOTMUTEX(); 791 nfsv4_unlock(&nfsv4rootfs_lock, 1); 792 NFSUNLOCKV4ROOTMUTEX(); 793 nfsrv_zapclient(clp, p); 794out: 795 NFSEXITCODE2(error, nd); 796 return (error); 797} 798 799/* 800 * Called from the new nfssvc syscall to admin revoke a clientid. 801 * Returns 0 for success, error otherwise. 802 */ 803APPLESTATIC int 804nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 805{ 806 struct nfsclient *clp = NULL; 807 int i, error = 0; 808 int gotit, igotlock; 809 810 /* 811 * First, lock out the nfsd so that state won't change while the 812 * revocation record is being written to the stable storage restart 813 * file. 814 */ 815 NFSLOCKV4ROOTMUTEX(); 816 do { 817 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 818 NFSV4ROOTLOCKMUTEXPTR, NULL); 819 } while (!igotlock); 820 NFSUNLOCKV4ROOTMUTEX(); 821 822 /* 823 * Search for a match in the client list. 824 */ 825 gotit = i = 0; 826 while (i < nfsrv_clienthashsize && !gotit) { 827 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 828 if (revokep->nclid_idlen == clp->lc_idlen && 829 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 830 gotit = 1; 831 break; 832 } 833 } 834 i++; 835 } 836 if (!gotit) { 837 NFSLOCKV4ROOTMUTEX(); 838 nfsv4_unlock(&nfsv4rootfs_lock, 0); 839 NFSUNLOCKV4ROOTMUTEX(); 840 error = EPERM; 841 goto out; 842 } 843 844 /* 845 * Now, write out the revocation record 846 */ 847 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 848 nfsrv_backupstable(); 849 850 /* 851 * and clear out the state, marking the clientid revoked. 852 */ 853 clp->lc_flags &= ~LCL_CALLBACKSON; 854 clp->lc_flags |= LCL_ADMINREVOKED; 855 nfsrv_cleanclient(clp, p); 856 nfsrv_freedeleglist(&clp->lc_deleg); 857 nfsrv_freedeleglist(&clp->lc_olddeleg); 858 NFSLOCKV4ROOTMUTEX(); 859 nfsv4_unlock(&nfsv4rootfs_lock, 0); 860 NFSUNLOCKV4ROOTMUTEX(); 861 862out: 863 NFSEXITCODE(error); 864 return (error); 865} 866 867/* 868 * Dump out stats for all clients. Called from nfssvc(2), that is used 869 * newnfsstats. 870 */ 871APPLESTATIC void 872nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 873{ 874 struct nfsclient *clp; 875 int i = 0, cnt = 0; 876 877 /* 878 * First, get a reference on the nfsv4rootfs_lock so that an 879 * exclusive lock cannot be acquired while dumping the clients. 880 */ 881 NFSLOCKV4ROOTMUTEX(); 882 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 883 NFSUNLOCKV4ROOTMUTEX(); 884 NFSLOCKSTATE(); 885 /* 886 * Rattle through the client lists until done. 887 */ 888 while (i < nfsrv_clienthashsize && cnt < maxcnt) { 889 clp = LIST_FIRST(&nfsclienthash[i]); 890 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 891 nfsrv_dumpaclient(clp, &dumpp[cnt]); 892 cnt++; 893 clp = LIST_NEXT(clp, lc_hash); 894 } 895 i++; 896 } 897 if (cnt < maxcnt) 898 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 899 NFSUNLOCKSTATE(); 900 NFSLOCKV4ROOTMUTEX(); 901 nfsv4_relref(&nfsv4rootfs_lock); 902 NFSUNLOCKV4ROOTMUTEX(); 903} 904 905/* 906 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 907 */ 908static void 909nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 910{ 911 struct nfsstate *stp, *openstp, *lckownstp; 912 struct nfslock *lop; 913 sa_family_t af; 914#ifdef INET 915 struct sockaddr_in *rin; 916#endif 917#ifdef INET6 918 struct sockaddr_in6 *rin6; 919#endif 920 921 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 922 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 923 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 924 dumpp->ndcl_flags = clp->lc_flags; 925 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 926 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 927 af = clp->lc_req.nr_nam->sa_family; 928 dumpp->ndcl_addrfam = af; 929 switch (af) { 930#ifdef INET 931 case AF_INET: 932 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 933 dumpp->ndcl_cbaddr.sin_addr = rin->sin_addr; 934 break; 935#endif 936#ifdef INET6 937 case AF_INET6: 938 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 939 dumpp->ndcl_cbaddr.sin6_addr = rin6->sin6_addr; 940 break; 941#endif 942 } 943 944 /* 945 * Now, scan the state lists and total up the opens and locks. 946 */ 947 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 948 dumpp->ndcl_nopenowners++; 949 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 950 dumpp->ndcl_nopens++; 951 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 952 dumpp->ndcl_nlockowners++; 953 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 954 dumpp->ndcl_nlocks++; 955 } 956 } 957 } 958 } 959 960 /* 961 * and the delegation lists. 962 */ 963 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 964 dumpp->ndcl_ndelegs++; 965 } 966 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 967 dumpp->ndcl_nolddelegs++; 968 } 969} 970 971/* 972 * Dump out lock stats for a file. 973 */ 974APPLESTATIC void 975nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 976 NFSPROC_T *p) 977{ 978 struct nfsstate *stp; 979 struct nfslock *lop; 980 int cnt = 0; 981 struct nfslockfile *lfp; 982 sa_family_t af; 983#ifdef INET 984 struct sockaddr_in *rin; 985#endif 986#ifdef INET6 987 struct sockaddr_in6 *rin6; 988#endif 989 int ret; 990 fhandle_t nfh; 991 992 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 993 /* 994 * First, get a reference on the nfsv4rootfs_lock so that an 995 * exclusive lock on it cannot be acquired while dumping the locks. 996 */ 997 NFSLOCKV4ROOTMUTEX(); 998 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 999 NFSUNLOCKV4ROOTMUTEX(); 1000 NFSLOCKSTATE(); 1001 if (!ret) 1002 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 1003 if (ret) { 1004 ldumpp[0].ndlck_clid.nclid_idlen = 0; 1005 NFSUNLOCKSTATE(); 1006 NFSLOCKV4ROOTMUTEX(); 1007 nfsv4_relref(&nfsv4rootfs_lock); 1008 NFSUNLOCKV4ROOTMUTEX(); 1009 return; 1010 } 1011 1012 /* 1013 * For each open share on file, dump it out. 1014 */ 1015 stp = LIST_FIRST(&lfp->lf_open); 1016 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 1017 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1018 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1019 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1020 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1021 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1022 ldumpp[cnt].ndlck_owner.nclid_idlen = 1023 stp->ls_openowner->ls_ownerlen; 1024 NFSBCOPY(stp->ls_openowner->ls_owner, 1025 ldumpp[cnt].ndlck_owner.nclid_id, 1026 stp->ls_openowner->ls_ownerlen); 1027 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1028 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1029 stp->ls_clp->lc_idlen); 1030 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1031 ldumpp[cnt].ndlck_addrfam = af; 1032 switch (af) { 1033#ifdef INET 1034 case AF_INET: 1035 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1036 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1037 break; 1038#endif 1039#ifdef INET6 1040 case AF_INET6: 1041 rin6 = (struct sockaddr_in6 *) 1042 stp->ls_clp->lc_req.nr_nam; 1043 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1044 break; 1045#endif 1046 } 1047 stp = LIST_NEXT(stp, ls_file); 1048 cnt++; 1049 } 1050 1051 /* 1052 * and all locks. 1053 */ 1054 lop = LIST_FIRST(&lfp->lf_lock); 1055 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 1056 stp = lop->lo_stp; 1057 ldumpp[cnt].ndlck_flags = lop->lo_flags; 1058 ldumpp[cnt].ndlck_first = lop->lo_first; 1059 ldumpp[cnt].ndlck_end = lop->lo_end; 1060 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1061 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1062 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1063 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1064 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 1065 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 1066 stp->ls_ownerlen); 1067 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1068 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1069 stp->ls_clp->lc_idlen); 1070 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1071 ldumpp[cnt].ndlck_addrfam = af; 1072 switch (af) { 1073#ifdef INET 1074 case AF_INET: 1075 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1076 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1077 break; 1078#endif 1079#ifdef INET6 1080 case AF_INET6: 1081 rin6 = (struct sockaddr_in6 *) 1082 stp->ls_clp->lc_req.nr_nam; 1083 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1084 break; 1085#endif 1086 } 1087 lop = LIST_NEXT(lop, lo_lckfile); 1088 cnt++; 1089 } 1090 1091 /* 1092 * and the delegations. 1093 */ 1094 stp = LIST_FIRST(&lfp->lf_deleg); 1095 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 1096 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1097 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1098 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1099 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1100 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1101 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 1102 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1103 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1104 stp->ls_clp->lc_idlen); 1105 af = stp->ls_clp->lc_req.nr_nam->sa_family; 1106 ldumpp[cnt].ndlck_addrfam = af; 1107 switch (af) { 1108#ifdef INET 1109 case AF_INET: 1110 rin = (struct sockaddr_in *)stp->ls_clp->lc_req.nr_nam; 1111 ldumpp[cnt].ndlck_cbaddr.sin_addr = rin->sin_addr; 1112 break; 1113#endif 1114#ifdef INET6 1115 case AF_INET6: 1116 rin6 = (struct sockaddr_in6 *) 1117 stp->ls_clp->lc_req.nr_nam; 1118 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rin6->sin6_addr; 1119 break; 1120#endif 1121 } 1122 stp = LIST_NEXT(stp, ls_file); 1123 cnt++; 1124 } 1125 1126 /* 1127 * If list isn't full, mark end of list by setting the client name 1128 * to zero length. 1129 */ 1130 if (cnt < maxcnt) 1131 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1132 NFSUNLOCKSTATE(); 1133 NFSLOCKV4ROOTMUTEX(); 1134 nfsv4_relref(&nfsv4rootfs_lock); 1135 NFSUNLOCKV4ROOTMUTEX(); 1136} 1137 1138/* 1139 * Server timer routine. It can scan any linked list, so long 1140 * as it holds the spin/mutex lock and there is no exclusive lock on 1141 * nfsv4rootfs_lock. 1142 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1143 * to do this from a callout, since the spin locks work. For 1144 * Darwin, I'm not sure what will work correctly yet.) 1145 * Should be called once per second. 1146 */ 1147APPLESTATIC void 1148nfsrv_servertimer(void) 1149{ 1150 struct nfsclient *clp, *nclp; 1151 struct nfsstate *stp, *nstp; 1152 int got_ref, i; 1153 1154 /* 1155 * Make sure nfsboottime is set. This is used by V3 as well 1156 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1157 * only used by the V4 server for leases. 1158 */ 1159 if (nfsboottime.tv_sec == 0) 1160 NFSSETBOOTTIME(nfsboottime); 1161 1162 /* 1163 * If server hasn't started yet, just return. 1164 */ 1165 NFSLOCKSTATE(); 1166 if (nfsrv_stablefirst.nsf_eograce == 0) { 1167 NFSUNLOCKSTATE(); 1168 return; 1169 } 1170 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 1171 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 1172 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 1173 nfsrv_stablefirst.nsf_flags |= 1174 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1175 NFSUNLOCKSTATE(); 1176 return; 1177 } 1178 1179 /* 1180 * Try and get a reference count on the nfsv4rootfs_lock so that 1181 * no nfsd thread can acquire an exclusive lock on it before this 1182 * call is done. If it is already exclusively locked, just return. 1183 */ 1184 NFSLOCKV4ROOTMUTEX(); 1185 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1186 NFSUNLOCKV4ROOTMUTEX(); 1187 if (got_ref == 0) { 1188 NFSUNLOCKSTATE(); 1189 return; 1190 } 1191 1192 /* 1193 * For each client... 1194 */ 1195 for (i = 0; i < nfsrv_clienthashsize; i++) { 1196 clp = LIST_FIRST(&nfsclienthash[i]); 1197 while (clp != LIST_END(&nfsclienthash[i])) { 1198 nclp = LIST_NEXT(clp, lc_hash); 1199 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1200 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1201 && ((LIST_EMPTY(&clp->lc_deleg) 1202 && LIST_EMPTY(&clp->lc_open)) || 1203 nfsrv_clients > nfsrv_clienthighwater)) || 1204 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1205 (clp->lc_expiry < NFSD_MONOSEC && 1206 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) { 1207 /* 1208 * Lease has expired several nfsrv_lease times ago: 1209 * PLUS 1210 * - no state is associated with it 1211 * OR 1212 * - above high water mark for number of clients 1213 * (nfsrv_clienthighwater should be large enough 1214 * that this only occurs when clients fail to 1215 * use the same nfs_client_id4.id. Maybe somewhat 1216 * higher that the maximum number of clients that 1217 * will mount this server?) 1218 * OR 1219 * Lease has expired a very long time ago 1220 * OR 1221 * Lease has expired PLUS the number of opens + locks 1222 * has exceeded 90% of capacity 1223 * 1224 * --> Mark for expiry. The actual expiry will be done 1225 * by an nfsd sometime soon. 1226 */ 1227 clp->lc_flags |= LCL_EXPIREIT; 1228 nfsrv_stablefirst.nsf_flags |= 1229 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1230 } else { 1231 /* 1232 * If there are no opens, increment no open tick cnt 1233 * If time exceeds NFSNOOPEN, mark it to be thrown away 1234 * otherwise, if there is an open, reset no open time 1235 * Hopefully, this will avoid excessive re-creation 1236 * of open owners and subsequent open confirms. 1237 */ 1238 stp = LIST_FIRST(&clp->lc_open); 1239 while (stp != LIST_END(&clp->lc_open)) { 1240 nstp = LIST_NEXT(stp, ls_list); 1241 if (LIST_EMPTY(&stp->ls_open)) { 1242 stp->ls_noopens++; 1243 if (stp->ls_noopens > NFSNOOPEN || 1244 (nfsrv_openpluslock * 2) > 1245 nfsrv_v4statelimit) 1246 nfsrv_stablefirst.nsf_flags |= 1247 NFSNSF_NOOPENS; 1248 } else { 1249 stp->ls_noopens = 0; 1250 } 1251 stp = nstp; 1252 } 1253 } 1254 } 1255 clp = nclp; 1256 } 1257 } 1258 NFSUNLOCKSTATE(); 1259 NFSLOCKV4ROOTMUTEX(); 1260 nfsv4_relref(&nfsv4rootfs_lock); 1261 NFSUNLOCKV4ROOTMUTEX(); 1262} 1263 1264/* 1265 * The following set of functions free up the various data structures. 1266 */ 1267/* 1268 * Clear out all open/lock state related to this nfsclient. 1269 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1270 * there are no other active nfsd threads. 1271 */ 1272APPLESTATIC void 1273nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1274{ 1275 struct nfsstate *stp, *nstp; 1276 struct nfsdsession *sep, *nsep; 1277 1278 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1279 nfsrv_freeopenowner(stp, 1, p); 1280 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1281 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1282 (void)nfsrv_freesession(sep, NULL); 1283} 1284 1285/* 1286 * Free a client that has been cleaned. It should also already have been 1287 * removed from the lists. 1288 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1289 * softclock interrupts are enabled.) 1290 */ 1291APPLESTATIC void 1292nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1293{ 1294 1295#ifdef notyet 1296 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1297 (LCL_GSS | LCL_CALLBACKSON) && 1298 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1299 clp->lc_handlelen > 0) { 1300 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1301 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1302 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1303 NULL, 0, NULL, NULL, NULL, p); 1304 } 1305#endif 1306 newnfs_disconnect(&clp->lc_req); 1307 NFSSOCKADDRFREE(clp->lc_req.nr_nam); 1308 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1309 free(clp->lc_stateid, M_NFSDCLIENT); 1310 free(clp, M_NFSDCLIENT); 1311 NFSLOCKSTATE(); 1312 newnfsstats.srvclients--; 1313 nfsrv_openpluslock--; 1314 nfsrv_clients--; 1315 NFSUNLOCKSTATE(); 1316} 1317 1318/* 1319 * Free a list of delegation state structures. 1320 * (This function will also free all nfslockfile structures that no 1321 * longer have associated state.) 1322 */ 1323APPLESTATIC void 1324nfsrv_freedeleglist(struct nfsstatehead *sthp) 1325{ 1326 struct nfsstate *stp, *nstp; 1327 1328 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1329 nfsrv_freedeleg(stp); 1330 } 1331 LIST_INIT(sthp); 1332} 1333 1334/* 1335 * Free up a delegation. 1336 */ 1337static void 1338nfsrv_freedeleg(struct nfsstate *stp) 1339{ 1340 struct nfslockfile *lfp; 1341 1342 LIST_REMOVE(stp, ls_hash); 1343 LIST_REMOVE(stp, ls_list); 1344 LIST_REMOVE(stp, ls_file); 1345 if ((stp->ls_flags & NFSLCK_DELEGWRITE) != 0) 1346 nfsrv_writedelegcnt--; 1347 lfp = stp->ls_lfp; 1348 if (LIST_EMPTY(&lfp->lf_open) && 1349 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1350 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1351 lfp->lf_usecount == 0 && 1352 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1353 nfsrv_freenfslockfile(lfp); 1354 FREE((caddr_t)stp, M_NFSDSTATE); 1355 newnfsstats.srvdelegates--; 1356 nfsrv_openpluslock--; 1357 nfsrv_delegatecnt--; 1358} 1359 1360/* 1361 * This function frees an open owner and all associated opens. 1362 */ 1363static void 1364nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1365{ 1366 struct nfsstate *nstp, *tstp; 1367 1368 LIST_REMOVE(stp, ls_list); 1369 /* 1370 * Now, free all associated opens. 1371 */ 1372 nstp = LIST_FIRST(&stp->ls_open); 1373 while (nstp != LIST_END(&stp->ls_open)) { 1374 tstp = nstp; 1375 nstp = LIST_NEXT(nstp, ls_list); 1376 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1377 } 1378 if (stp->ls_op) 1379 nfsrvd_derefcache(stp->ls_op); 1380 FREE((caddr_t)stp, M_NFSDSTATE); 1381 newnfsstats.srvopenowners--; 1382 nfsrv_openpluslock--; 1383} 1384 1385/* 1386 * This function frees an open (nfsstate open structure) with all associated 1387 * lock_owners and locks. It also frees the nfslockfile structure iff there 1388 * are no other opens on the file. 1389 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1390 */ 1391static int 1392nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1393{ 1394 struct nfsstate *nstp, *tstp; 1395 struct nfslockfile *lfp; 1396 int ret; 1397 1398 LIST_REMOVE(stp, ls_hash); 1399 LIST_REMOVE(stp, ls_list); 1400 LIST_REMOVE(stp, ls_file); 1401 1402 lfp = stp->ls_lfp; 1403 /* 1404 * Now, free all lockowners associated with this open. 1405 */ 1406 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1407 nfsrv_freelockowner(tstp, vp, cansleep, p); 1408 1409 /* 1410 * The nfslockfile is freed here if there are no locks 1411 * associated with the open. 1412 * If there are locks associated with the open, the 1413 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1414 * Acquire the state mutex to avoid races with calls to 1415 * nfsrv_getlockfile(). 1416 */ 1417 if (cansleep != 0) 1418 NFSLOCKSTATE(); 1419 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1420 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1421 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1422 lfp->lf_usecount == 0 && 1423 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1424 nfsrv_freenfslockfile(lfp); 1425 ret = 1; 1426 } else 1427 ret = 0; 1428 if (cansleep != 0) 1429 NFSUNLOCKSTATE(); 1430 FREE((caddr_t)stp, M_NFSDSTATE); 1431 newnfsstats.srvopens--; 1432 nfsrv_openpluslock--; 1433 return (ret); 1434} 1435 1436/* 1437 * Frees a lockowner and all associated locks. 1438 */ 1439static void 1440nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1441 NFSPROC_T *p) 1442{ 1443 1444 LIST_REMOVE(stp, ls_hash); 1445 LIST_REMOVE(stp, ls_list); 1446 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1447 if (stp->ls_op) 1448 nfsrvd_derefcache(stp->ls_op); 1449 FREE((caddr_t)stp, M_NFSDSTATE); 1450 newnfsstats.srvlockowners--; 1451 nfsrv_openpluslock--; 1452} 1453 1454/* 1455 * Free all the nfs locks on a lockowner. 1456 */ 1457static void 1458nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1459 NFSPROC_T *p) 1460{ 1461 struct nfslock *lop, *nlop; 1462 struct nfsrollback *rlp, *nrlp; 1463 struct nfslockfile *lfp = NULL; 1464 int gottvp = 0; 1465 vnode_t tvp = NULL; 1466 uint64_t first, end; 1467 1468 if (vp != NULL) 1469 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked"); 1470 lop = LIST_FIRST(&stp->ls_lock); 1471 while (lop != LIST_END(&stp->ls_lock)) { 1472 nlop = LIST_NEXT(lop, lo_lckowner); 1473 /* 1474 * Since all locks should be for the same file, lfp should 1475 * not change. 1476 */ 1477 if (lfp == NULL) 1478 lfp = lop->lo_lfp; 1479 else if (lfp != lop->lo_lfp) 1480 panic("allnfslocks"); 1481 /* 1482 * If vp is NULL and cansleep != 0, a vnode must be acquired 1483 * from the file handle. This only occurs when called from 1484 * nfsrv_cleanclient(). 1485 */ 1486 if (gottvp == 0) { 1487 if (nfsrv_dolocallocks == 0) 1488 tvp = NULL; 1489 else if (vp == NULL && cansleep != 0) { 1490 tvp = nfsvno_getvp(&lfp->lf_fh); 1491 if (tvp != NULL) 1492 NFSVOPUNLOCK(tvp, 0); 1493 } else 1494 tvp = vp; 1495 gottvp = 1; 1496 } 1497 1498 if (tvp != NULL) { 1499 if (cansleep == 0) 1500 panic("allnfs2"); 1501 first = lop->lo_first; 1502 end = lop->lo_end; 1503 nfsrv_freenfslock(lop); 1504 nfsrv_localunlock(tvp, lfp, first, end, p); 1505 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1506 nrlp) 1507 free(rlp, M_NFSDROLLBACK); 1508 LIST_INIT(&lfp->lf_rollback); 1509 } else 1510 nfsrv_freenfslock(lop); 1511 lop = nlop; 1512 } 1513 if (vp == NULL && tvp != NULL) 1514 vrele(tvp); 1515} 1516 1517/* 1518 * Free an nfslock structure. 1519 */ 1520static void 1521nfsrv_freenfslock(struct nfslock *lop) 1522{ 1523 1524 if (lop->lo_lckfile.le_prev != NULL) { 1525 LIST_REMOVE(lop, lo_lckfile); 1526 newnfsstats.srvlocks--; 1527 nfsrv_openpluslock--; 1528 } 1529 LIST_REMOVE(lop, lo_lckowner); 1530 FREE((caddr_t)lop, M_NFSDLOCK); 1531} 1532 1533/* 1534 * This function frees an nfslockfile structure. 1535 */ 1536static void 1537nfsrv_freenfslockfile(struct nfslockfile *lfp) 1538{ 1539 1540 LIST_REMOVE(lfp, lf_hash); 1541 FREE((caddr_t)lfp, M_NFSDLOCKFILE); 1542} 1543 1544/* 1545 * This function looks up an nfsstate structure via stateid. 1546 */ 1547static int 1548nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1549 struct nfsstate **stpp) 1550{ 1551 struct nfsstate *stp; 1552 struct nfsstatehead *hp; 1553 int error = 0; 1554 1555 *stpp = NULL; 1556 hp = NFSSTATEHASH(clp, *stateidp); 1557 LIST_FOREACH(stp, hp, ls_hash) { 1558 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1559 NFSX_STATEIDOTHER)) 1560 break; 1561 } 1562 1563 /* 1564 * If no state id in list, return NFSERR_BADSTATEID. 1565 */ 1566 if (stp == LIST_END(hp)) { 1567 error = NFSERR_BADSTATEID; 1568 goto out; 1569 } 1570 *stpp = stp; 1571 1572out: 1573 NFSEXITCODE(error); 1574 return (error); 1575} 1576 1577/* 1578 * This function gets an nfsstate structure via owner string. 1579 */ 1580static void 1581nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1582 struct nfsstate **stpp) 1583{ 1584 struct nfsstate *stp; 1585 1586 *stpp = NULL; 1587 LIST_FOREACH(stp, hp, ls_list) { 1588 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1589 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1590 *stpp = stp; 1591 return; 1592 } 1593 } 1594} 1595 1596/* 1597 * Lock control function called to update lock status. 1598 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1599 * that one isn't to be created and an NFSERR_xxx for other errors. 1600 * The structures new_stp and new_lop are passed in as pointers that should 1601 * be set to NULL if the structure is used and shouldn't be free'd. 1602 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1603 * never used and can safely be allocated on the stack. For all other 1604 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1605 * in case they are used. 1606 */ 1607APPLESTATIC int 1608nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1609 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1610 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1611 __unused struct nfsexstuff *exp, 1612 struct nfsrv_descript *nd, NFSPROC_T *p) 1613{ 1614 struct nfslock *lop; 1615 struct nfsstate *new_stp = *new_stpp; 1616 struct nfslock *new_lop = *new_lopp; 1617 struct nfsstate *tstp, *mystp, *nstp; 1618 int specialid = 0; 1619 struct nfslockfile *lfp; 1620 struct nfslock *other_lop = NULL; 1621 struct nfsstate *stp, *lckstp = NULL; 1622 struct nfsclient *clp = NULL; 1623 u_int32_t bits; 1624 int error = 0, haslock = 0, ret, reterr; 1625 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0; 1626 fhandle_t nfh; 1627 uint64_t first, end; 1628 uint32_t lock_flags; 1629 1630 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1631 /* 1632 * Note the special cases of "all 1s" or "all 0s" stateids and 1633 * let reads with all 1s go ahead. 1634 */ 1635 if (new_stp->ls_stateid.seqid == 0x0 && 1636 new_stp->ls_stateid.other[0] == 0x0 && 1637 new_stp->ls_stateid.other[1] == 0x0 && 1638 new_stp->ls_stateid.other[2] == 0x0) 1639 specialid = 1; 1640 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1641 new_stp->ls_stateid.other[0] == 0xffffffff && 1642 new_stp->ls_stateid.other[1] == 0xffffffff && 1643 new_stp->ls_stateid.other[2] == 0xffffffff) 1644 specialid = 2; 1645 } 1646 1647 /* 1648 * Check for restart conditions (client and server). 1649 */ 1650 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1651 &new_stp->ls_stateid, specialid); 1652 if (error) 1653 goto out; 1654 1655 /* 1656 * Check for state resource limit exceeded. 1657 */ 1658 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1659 nfsrv_openpluslock > nfsrv_v4statelimit) { 1660 error = NFSERR_RESOURCE; 1661 goto out; 1662 } 1663 1664 /* 1665 * For the lock case, get another nfslock structure, 1666 * just in case we need it. 1667 * Malloc now, before we start sifting through the linked lists, 1668 * in case we have to wait for memory. 1669 */ 1670tryagain: 1671 if (new_stp->ls_flags & NFSLCK_LOCK) 1672 MALLOC(other_lop, struct nfslock *, sizeof (struct nfslock), 1673 M_NFSDLOCK, M_WAITOK); 1674 filestruct_locked = 0; 1675 reterr = 0; 1676 lfp = NULL; 1677 1678 /* 1679 * Get the lockfile structure for CFH now, so we can do a sanity 1680 * check against the stateid, before incrementing the seqid#, since 1681 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1682 * shouldn't be incremented for this case. 1683 * If nfsrv_getlockfile() returns -1, it means "not found", which 1684 * will be handled later. 1685 * If we are doing Lock/LockU and local locking is enabled, sleep 1686 * lock the nfslockfile structure. 1687 */ 1688 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1689 NFSLOCKSTATE(); 1690 if (getlckret == 0) { 1691 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1692 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1693 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1694 &lfp, &nfh, 1); 1695 if (getlckret == 0) 1696 filestruct_locked = 1; 1697 } else 1698 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1699 &lfp, &nfh, 0); 1700 } 1701 if (getlckret != 0 && getlckret != -1) 1702 reterr = getlckret; 1703 1704 if (filestruct_locked != 0) { 1705 LIST_INIT(&lfp->lf_rollback); 1706 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1707 /* 1708 * For local locking, do the advisory locking now, so 1709 * that any conflict can be detected. A failure later 1710 * can be rolled back locally. If an error is returned, 1711 * struct nfslockfile has been unlocked and any local 1712 * locking rolled back. 1713 */ 1714 NFSUNLOCKSTATE(); 1715 if (vnode_unlocked == 0) { 1716 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1"); 1717 vnode_unlocked = 1; 1718 NFSVOPUNLOCK(vp, 0); 1719 } 1720 reterr = nfsrv_locallock(vp, lfp, 1721 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1722 new_lop->lo_first, new_lop->lo_end, cfp, p); 1723 NFSLOCKSTATE(); 1724 } 1725 } 1726 1727 if (specialid == 0) { 1728 if (new_stp->ls_flags & NFSLCK_TEST) { 1729 /* 1730 * RFC 3530 does not list LockT as an op that renews a 1731 * lease, but the concensus seems to be that it is ok 1732 * for a server to do so. 1733 */ 1734 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1735 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1736 1737 /* 1738 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1739 * error returns for LockT, just go ahead and test for a lock, 1740 * since there are no locks for this client, but other locks 1741 * can conflict. (ie. same client will always be false) 1742 */ 1743 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1744 error = 0; 1745 lckstp = new_stp; 1746 } else { 1747 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1748 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1749 if (error == 0) 1750 /* 1751 * Look up the stateid 1752 */ 1753 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1754 new_stp->ls_flags, &stp); 1755 /* 1756 * do some sanity checks for an unconfirmed open or a 1757 * stateid that refers to the wrong file, for an open stateid 1758 */ 1759 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1760 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1761 (getlckret == 0 && stp->ls_lfp != lfp))) 1762 error = NFSERR_BADSTATEID; 1763 if (error == 0 && 1764 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1765 getlckret == 0 && stp->ls_lfp != lfp) 1766 error = NFSERR_BADSTATEID; 1767 1768 /* 1769 * If the lockowner stateid doesn't refer to the same file, 1770 * I believe that is considered ok, since some clients will 1771 * only create a single lockowner and use that for all locks 1772 * on all files. 1773 * For now, log it as a diagnostic, instead of considering it 1774 * a BadStateid. 1775 */ 1776 if (error == 0 && (stp->ls_flags & 1777 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1778 getlckret == 0 && stp->ls_lfp != lfp) { 1779#ifdef DIAGNOSTIC 1780 printf("Got a lock statid for different file open\n"); 1781#endif 1782 /* 1783 error = NFSERR_BADSTATEID; 1784 */ 1785 } 1786 1787 if (error == 0) { 1788 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1789 /* 1790 * If haslock set, we've already checked the seqid. 1791 */ 1792 if (!haslock) { 1793 if (stp->ls_flags & NFSLCK_OPEN) 1794 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1795 stp->ls_openowner, new_stp->ls_op); 1796 else 1797 error = NFSERR_BADSTATEID; 1798 } 1799 if (!error) 1800 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1801 if (lckstp) 1802 /* 1803 * I believe this should be an error, but it 1804 * isn't obvious what NFSERR_xxx would be 1805 * appropriate, so I'll use NFSERR_INVAL for now. 1806 */ 1807 error = NFSERR_INVAL; 1808 else 1809 lckstp = new_stp; 1810 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1811 /* 1812 * If haslock set, ditto above. 1813 */ 1814 if (!haslock) { 1815 if (stp->ls_flags & NFSLCK_OPEN) 1816 error = NFSERR_BADSTATEID; 1817 else 1818 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1819 stp, new_stp->ls_op); 1820 } 1821 lckstp = stp; 1822 } else { 1823 lckstp = stp; 1824 } 1825 } 1826 /* 1827 * If the seqid part of the stateid isn't the same, return 1828 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1829 * For I/O Ops, only return NFSERR_OLDSTATEID if 1830 * nfsrv_returnoldstateid is set. (The concensus on the email 1831 * list was that most clients would prefer to not receive 1832 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1833 * is what will happen, so I use the nfsrv_returnoldstateid to 1834 * allow for either server configuration.) 1835 */ 1836 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1837 (((nd->nd_flag & ND_NFSV41) == 0 && 1838 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1839 nfsrv_returnoldstateid)) || 1840 ((nd->nd_flag & ND_NFSV41) != 0 && 1841 new_stp->ls_stateid.seqid != 0))) 1842 error = NFSERR_OLDSTATEID; 1843 } 1844 } 1845 1846 /* 1847 * Now we can check for grace. 1848 */ 1849 if (!error) 1850 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1851 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1852 nfsrv_checkstable(clp)) 1853 error = NFSERR_NOGRACE; 1854 /* 1855 * If we successfully Reclaimed state, note that. 1856 */ 1857 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1858 nfsrv_markstable(clp); 1859 1860 /* 1861 * At this point, either error == NFSERR_BADSTATEID or the 1862 * seqid# has been updated, so we can return any error. 1863 * If error == 0, there may be an error in: 1864 * nd_repstat - Set by the calling function. 1865 * reterr - Set above, if getting the nfslockfile structure 1866 * or acquiring the local lock failed. 1867 * (If both of these are set, nd_repstat should probably be 1868 * returned, since that error was detected before this 1869 * function call.) 1870 */ 1871 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1872 if (error == 0) { 1873 if (nd->nd_repstat != 0) 1874 error = nd->nd_repstat; 1875 else 1876 error = reterr; 1877 } 1878 if (filestruct_locked != 0) { 1879 /* Roll back local locks. */ 1880 NFSUNLOCKSTATE(); 1881 if (vnode_unlocked == 0) { 1882 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2"); 1883 vnode_unlocked = 1; 1884 NFSVOPUNLOCK(vp, 0); 1885 } 1886 nfsrv_locallock_rollback(vp, lfp, p); 1887 NFSLOCKSTATE(); 1888 nfsrv_unlocklf(lfp); 1889 } 1890 NFSUNLOCKSTATE(); 1891 goto out; 1892 } 1893 1894 /* 1895 * Check the nfsrv_getlockfile return. 1896 * Returned -1 if no structure found. 1897 */ 1898 if (getlckret == -1) { 1899 error = NFSERR_EXPIRED; 1900 /* 1901 * Called from lockt, so no lock is OK. 1902 */ 1903 if (new_stp->ls_flags & NFSLCK_TEST) { 1904 error = 0; 1905 } else if (new_stp->ls_flags & 1906 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1907 /* 1908 * Called to check for a lock, OK if the stateid is all 1909 * 1s or all 0s, but there should be an nfsstate 1910 * otherwise. 1911 * (ie. If there is no open, I'll assume no share 1912 * deny bits.) 1913 */ 1914 if (specialid) 1915 error = 0; 1916 else 1917 error = NFSERR_BADSTATEID; 1918 } 1919 NFSUNLOCKSTATE(); 1920 goto out; 1921 } 1922 1923 /* 1924 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 1925 * For NFSLCK_CHECK, allow a read if write access is granted, 1926 * but check for a deny. For NFSLCK_LOCK, require correct access, 1927 * which implies a conflicting deny can't exist. 1928 */ 1929 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 1930 /* 1931 * Four kinds of state id: 1932 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 1933 * - stateid for an open 1934 * - stateid for a delegation 1935 * - stateid for a lock owner 1936 */ 1937 if (!specialid) { 1938 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 1939 delegation = 1; 1940 mystp = stp; 1941 nfsrv_delaydelegtimeout(stp); 1942 } else if (stp->ls_flags & NFSLCK_OPEN) { 1943 mystp = stp; 1944 } else { 1945 mystp = stp->ls_openstp; 1946 } 1947 /* 1948 * If locking or checking, require correct access 1949 * bit set. 1950 */ 1951 if (((new_stp->ls_flags & NFSLCK_LOCK) && 1952 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 1953 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 1954 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 1955 (NFSLCK_CHECK | NFSLCK_READACCESS) && 1956 !(mystp->ls_flags & NFSLCK_READACCESS) && 1957 nfsrv_allowreadforwriteopen == 0) || 1958 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 1959 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 1960 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 1961 if (filestruct_locked != 0) { 1962 /* Roll back local locks. */ 1963 NFSUNLOCKSTATE(); 1964 if (vnode_unlocked == 0) { 1965 ASSERT_VOP_ELOCKED(vp, 1966 "nfsrv_lockctrl3"); 1967 vnode_unlocked = 1; 1968 NFSVOPUNLOCK(vp, 0); 1969 } 1970 nfsrv_locallock_rollback(vp, lfp, p); 1971 NFSLOCKSTATE(); 1972 nfsrv_unlocklf(lfp); 1973 } 1974 NFSUNLOCKSTATE(); 1975 error = NFSERR_OPENMODE; 1976 goto out; 1977 } 1978 } else 1979 mystp = NULL; 1980 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 1981 /* 1982 * Check for a conflicting deny bit. 1983 */ 1984 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 1985 if (tstp != mystp) { 1986 bits = tstp->ls_flags; 1987 bits >>= NFSLCK_SHIFT; 1988 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 1989 KASSERT(vnode_unlocked == 0, 1990 ("nfsrv_lockctrl: vnode unlocked1")); 1991 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 1992 vp, p); 1993 if (ret == 1) { 1994 /* 1995 * nfsrv_clientconflict unlocks state 1996 * when it returns non-zero. 1997 */ 1998 lckstp = NULL; 1999 goto tryagain; 2000 } 2001 if (ret == 0) 2002 NFSUNLOCKSTATE(); 2003 if (ret == 2) 2004 error = NFSERR_PERM; 2005 else 2006 error = NFSERR_OPENMODE; 2007 goto out; 2008 } 2009 } 2010 } 2011 2012 /* We're outta here */ 2013 NFSUNLOCKSTATE(); 2014 goto out; 2015 } 2016 } 2017 2018 /* 2019 * For setattr, just get rid of all the Delegations for other clients. 2020 */ 2021 if (new_stp->ls_flags & NFSLCK_SETATTR) { 2022 KASSERT(vnode_unlocked == 0, 2023 ("nfsrv_lockctrl: vnode unlocked2")); 2024 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 2025 if (ret) { 2026 /* 2027 * nfsrv_cleandeleg() unlocks state when it 2028 * returns non-zero. 2029 */ 2030 if (ret == -1) { 2031 lckstp = NULL; 2032 goto tryagain; 2033 } 2034 error = ret; 2035 goto out; 2036 } 2037 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 2038 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 2039 LIST_EMPTY(&lfp->lf_deleg))) { 2040 NFSUNLOCKSTATE(); 2041 goto out; 2042 } 2043 } 2044 2045 /* 2046 * Check for a conflicting delegation. If one is found, call 2047 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2048 * been set yet, it will get the lock. Otherwise, it will recall 2049 * the delegation. Then, we try try again... 2050 * I currently believe the conflict algorithm to be: 2051 * For Lock Ops (Lock/LockT/LockU) 2052 * - there is a conflict iff a different client has a write delegation 2053 * For Reading (Read Op) 2054 * - there is a conflict iff a different client has a write delegation 2055 * (the specialids are always a different client) 2056 * For Writing (Write/Setattr of size) 2057 * - there is a conflict if a different client has any delegation 2058 * - there is a conflict if the same client has a read delegation 2059 * (I don't understand why this isn't allowed, but that seems to be 2060 * the current concensus?) 2061 */ 2062 tstp = LIST_FIRST(&lfp->lf_deleg); 2063 while (tstp != LIST_END(&lfp->lf_deleg)) { 2064 nstp = LIST_NEXT(tstp, ls_file); 2065 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 2066 ((new_stp->ls_flags & NFSLCK_CHECK) && 2067 (new_lop->lo_flags & NFSLCK_READ))) && 2068 clp != tstp->ls_clp && 2069 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 2070 ((new_stp->ls_flags & NFSLCK_CHECK) && 2071 (new_lop->lo_flags & NFSLCK_WRITE) && 2072 (clp != tstp->ls_clp || 2073 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 2074 ret = 0; 2075 if (filestruct_locked != 0) { 2076 /* Roll back local locks. */ 2077 NFSUNLOCKSTATE(); 2078 if (vnode_unlocked == 0) { 2079 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4"); 2080 NFSVOPUNLOCK(vp, 0); 2081 } 2082 nfsrv_locallock_rollback(vp, lfp, p); 2083 NFSLOCKSTATE(); 2084 nfsrv_unlocklf(lfp); 2085 NFSUNLOCKSTATE(); 2086 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2087 vnode_unlocked = 0; 2088 if ((vp->v_iflag & VI_DOOMED) != 0) 2089 ret = NFSERR_SERVERFAULT; 2090 NFSLOCKSTATE(); 2091 } 2092 if (ret == 0) 2093 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 2094 if (ret) { 2095 /* 2096 * nfsrv_delegconflict unlocks state when it 2097 * returns non-zero, which it always does. 2098 */ 2099 if (other_lop) { 2100 FREE((caddr_t)other_lop, M_NFSDLOCK); 2101 other_lop = NULL; 2102 } 2103 if (ret == -1) { 2104 lckstp = NULL; 2105 goto tryagain; 2106 } 2107 error = ret; 2108 goto out; 2109 } 2110 /* Never gets here. */ 2111 } 2112 tstp = nstp; 2113 } 2114 2115 /* 2116 * Handle the unlock case by calling nfsrv_updatelock(). 2117 * (Should I have done some access checking above for unlock? For now, 2118 * just let it happen.) 2119 */ 2120 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 2121 first = new_lop->lo_first; 2122 end = new_lop->lo_end; 2123 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 2124 stateidp->seqid = ++(stp->ls_stateid.seqid); 2125 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2126 stateidp->seqid = stp->ls_stateid.seqid = 1; 2127 stateidp->other[0] = stp->ls_stateid.other[0]; 2128 stateidp->other[1] = stp->ls_stateid.other[1]; 2129 stateidp->other[2] = stp->ls_stateid.other[2]; 2130 if (filestruct_locked != 0) { 2131 NFSUNLOCKSTATE(); 2132 if (vnode_unlocked == 0) { 2133 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5"); 2134 vnode_unlocked = 1; 2135 NFSVOPUNLOCK(vp, 0); 2136 } 2137 /* Update the local locks. */ 2138 nfsrv_localunlock(vp, lfp, first, end, p); 2139 NFSLOCKSTATE(); 2140 nfsrv_unlocklf(lfp); 2141 } 2142 NFSUNLOCKSTATE(); 2143 goto out; 2144 } 2145 2146 /* 2147 * Search for a conflicting lock. A lock conflicts if: 2148 * - the lock range overlaps and 2149 * - at least one lock is a write lock and 2150 * - it is not owned by the same lock owner 2151 */ 2152 if (!delegation) { 2153 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 2154 if (new_lop->lo_end > lop->lo_first && 2155 new_lop->lo_first < lop->lo_end && 2156 (new_lop->lo_flags == NFSLCK_WRITE || 2157 lop->lo_flags == NFSLCK_WRITE) && 2158 lckstp != lop->lo_stp && 2159 (clp != lop->lo_stp->ls_clp || 2160 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 2161 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 2162 lckstp->ls_ownerlen))) { 2163 if (other_lop) { 2164 FREE((caddr_t)other_lop, M_NFSDLOCK); 2165 other_lop = NULL; 2166 } 2167 if (vnode_unlocked != 0) 2168 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2169 NULL, p); 2170 else 2171 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2172 vp, p); 2173 if (ret == 1) { 2174 if (filestruct_locked != 0) { 2175 if (vnode_unlocked == 0) { 2176 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6"); 2177 NFSVOPUNLOCK(vp, 0); 2178 } 2179 /* Roll back local locks. */ 2180 nfsrv_locallock_rollback(vp, lfp, p); 2181 NFSLOCKSTATE(); 2182 nfsrv_unlocklf(lfp); 2183 NFSUNLOCKSTATE(); 2184 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2185 vnode_unlocked = 0; 2186 if ((vp->v_iflag & VI_DOOMED) != 0) { 2187 error = NFSERR_SERVERFAULT; 2188 goto out; 2189 } 2190 } 2191 /* 2192 * nfsrv_clientconflict() unlocks state when it 2193 * returns non-zero. 2194 */ 2195 lckstp = NULL; 2196 goto tryagain; 2197 } 2198 /* 2199 * Found a conflicting lock, so record the conflict and 2200 * return the error. 2201 */ 2202 if (cfp != NULL && ret == 0) { 2203 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2204 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2205 cfp->cl_first = lop->lo_first; 2206 cfp->cl_end = lop->lo_end; 2207 cfp->cl_flags = lop->lo_flags; 2208 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2209 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2210 cfp->cl_ownerlen); 2211 } 2212 if (ret == 2) 2213 error = NFSERR_PERM; 2214 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2215 error = NFSERR_RECLAIMCONFLICT; 2216 else if (new_stp->ls_flags & NFSLCK_CHECK) 2217 error = NFSERR_LOCKED; 2218 else 2219 error = NFSERR_DENIED; 2220 if (filestruct_locked != 0 && ret == 0) { 2221 /* Roll back local locks. */ 2222 NFSUNLOCKSTATE(); 2223 if (vnode_unlocked == 0) { 2224 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7"); 2225 vnode_unlocked = 1; 2226 NFSVOPUNLOCK(vp, 0); 2227 } 2228 nfsrv_locallock_rollback(vp, lfp, p); 2229 NFSLOCKSTATE(); 2230 nfsrv_unlocklf(lfp); 2231 } 2232 if (ret == 0) 2233 NFSUNLOCKSTATE(); 2234 goto out; 2235 } 2236 } 2237 } 2238 2239 /* 2240 * We only get here if there was no lock that conflicted. 2241 */ 2242 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2243 NFSUNLOCKSTATE(); 2244 goto out; 2245 } 2246 2247 /* 2248 * We only get here when we are creating or modifying a lock. 2249 * There are two variants: 2250 * - exist_lock_owner where lock_owner exists 2251 * - open_to_lock_owner with new lock_owner 2252 */ 2253 first = new_lop->lo_first; 2254 end = new_lop->lo_end; 2255 lock_flags = new_lop->lo_flags; 2256 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2257 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2258 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2259 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2260 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2261 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2262 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2263 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2264 } else { 2265 /* 2266 * The new open_to_lock_owner case. 2267 * Link the new nfsstate into the lists. 2268 */ 2269 new_stp->ls_seq = new_stp->ls_opentolockseq; 2270 nfsrvd_refcache(new_stp->ls_op); 2271 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2272 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2273 clp->lc_clientid.lval[0]; 2274 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2275 clp->lc_clientid.lval[1]; 2276 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2277 nfsrv_nextstateindex(clp); 2278 new_stp->ls_clp = clp; 2279 LIST_INIT(&new_stp->ls_lock); 2280 new_stp->ls_openstp = stp; 2281 new_stp->ls_lfp = lfp; 2282 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2283 lfp); 2284 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2285 new_stp, ls_hash); 2286 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2287 *new_lopp = NULL; 2288 *new_stpp = NULL; 2289 newnfsstats.srvlockowners++; 2290 nfsrv_openpluslock++; 2291 } 2292 if (filestruct_locked != 0) { 2293 NFSUNLOCKSTATE(); 2294 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2295 NFSLOCKSTATE(); 2296 nfsrv_unlocklf(lfp); 2297 } 2298 NFSUNLOCKSTATE(); 2299 2300out: 2301 if (haslock) { 2302 NFSLOCKV4ROOTMUTEX(); 2303 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2304 NFSUNLOCKV4ROOTMUTEX(); 2305 } 2306 if (vnode_unlocked != 0) { 2307 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2308 if (error == 0 && (vp->v_iflag & VI_DOOMED) != 0) 2309 error = NFSERR_SERVERFAULT; 2310 } 2311 if (other_lop) 2312 FREE((caddr_t)other_lop, M_NFSDLOCK); 2313 NFSEXITCODE2(error, nd); 2314 return (error); 2315} 2316 2317/* 2318 * Check for state errors for Open. 2319 * repstat is passed back out as an error if more critical errors 2320 * are not detected. 2321 */ 2322APPLESTATIC int 2323nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2324 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2325 NFSPROC_T *p, int repstat) 2326{ 2327 struct nfsstate *stp, *nstp; 2328 struct nfsclient *clp; 2329 struct nfsstate *ownerstp; 2330 struct nfslockfile *lfp, *new_lfp; 2331 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2332 2333 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2334 readonly = 1; 2335 /* 2336 * Check for restart conditions (client and server). 2337 */ 2338 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2339 &new_stp->ls_stateid, 0); 2340 if (error) 2341 goto out; 2342 2343 /* 2344 * Check for state resource limit exceeded. 2345 * Technically this should be SMP protected, but the worst 2346 * case error is "out by one or two" on the count when it 2347 * returns NFSERR_RESOURCE and the limit is just a rather 2348 * arbitrary high water mark, so no harm is done. 2349 */ 2350 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 2351 error = NFSERR_RESOURCE; 2352 goto out; 2353 } 2354 2355tryagain: 2356 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2357 M_NFSDLOCKFILE, M_WAITOK); 2358 if (vp) 2359 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2360 NULL, p); 2361 NFSLOCKSTATE(); 2362 /* 2363 * Get the nfsclient structure. 2364 */ 2365 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2366 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2367 2368 /* 2369 * Look up the open owner. See if it needs confirmation and 2370 * check the seq#, as required. 2371 */ 2372 if (!error) 2373 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2374 2375 if (!error && ownerstp) { 2376 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2377 new_stp->ls_op); 2378 /* 2379 * If the OpenOwner hasn't been confirmed, assume the 2380 * old one was a replay and this one is ok. 2381 * See: RFC3530 Sec. 14.2.18. 2382 */ 2383 if (error == NFSERR_BADSEQID && 2384 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2385 error = 0; 2386 } 2387 2388 /* 2389 * Check for grace. 2390 */ 2391 if (!error) 2392 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2393 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2394 nfsrv_checkstable(clp)) 2395 error = NFSERR_NOGRACE; 2396 2397 /* 2398 * If none of the above errors occurred, let repstat be 2399 * returned. 2400 */ 2401 if (repstat && !error) 2402 error = repstat; 2403 if (error) { 2404 NFSUNLOCKSTATE(); 2405 if (haslock) { 2406 NFSLOCKV4ROOTMUTEX(); 2407 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2408 NFSUNLOCKV4ROOTMUTEX(); 2409 } 2410 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2411 goto out; 2412 } 2413 2414 /* 2415 * If vp == NULL, the file doesn't exist yet, so return ok. 2416 * (This always happens on the first pass, so haslock must be 0.) 2417 */ 2418 if (vp == NULL) { 2419 NFSUNLOCKSTATE(); 2420 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2421 goto out; 2422 } 2423 2424 /* 2425 * Get the structure for the underlying file. 2426 */ 2427 if (getfhret) 2428 error = getfhret; 2429 else 2430 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2431 NULL, 0); 2432 if (new_lfp) 2433 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2434 if (error) { 2435 NFSUNLOCKSTATE(); 2436 if (haslock) { 2437 NFSLOCKV4ROOTMUTEX(); 2438 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2439 NFSUNLOCKV4ROOTMUTEX(); 2440 } 2441 goto out; 2442 } 2443 2444 /* 2445 * Search for a conflicting open/share. 2446 */ 2447 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2448 /* 2449 * For Delegate_Cur, search for the matching Delegation, 2450 * which indicates no conflict. 2451 * An old delegation should have been recovered by the 2452 * client doing a Claim_DELEGATE_Prev, so I won't let 2453 * it match and return NFSERR_EXPIRED. Should I let it 2454 * match? 2455 */ 2456 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2457 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2458 (((nd->nd_flag & ND_NFSV41) != 0 && 2459 stateidp->seqid == 0) || 2460 stateidp->seqid == stp->ls_stateid.seqid) && 2461 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2462 NFSX_STATEIDOTHER)) 2463 break; 2464 } 2465 if (stp == LIST_END(&lfp->lf_deleg) || 2466 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2467 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2468 NFSUNLOCKSTATE(); 2469 if (haslock) { 2470 NFSLOCKV4ROOTMUTEX(); 2471 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2472 NFSUNLOCKV4ROOTMUTEX(); 2473 } 2474 error = NFSERR_EXPIRED; 2475 goto out; 2476 } 2477 } 2478 2479 /* 2480 * Check for access/deny bit conflicts. I check for the same 2481 * owner as well, in case the client didn't bother. 2482 */ 2483 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2484 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2485 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2486 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2487 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2488 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2489 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2490 if (ret == 1) { 2491 /* 2492 * nfsrv_clientconflict() unlocks 2493 * state when it returns non-zero. 2494 */ 2495 goto tryagain; 2496 } 2497 if (ret == 2) 2498 error = NFSERR_PERM; 2499 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2500 error = NFSERR_RECLAIMCONFLICT; 2501 else 2502 error = NFSERR_SHAREDENIED; 2503 if (ret == 0) 2504 NFSUNLOCKSTATE(); 2505 if (haslock) { 2506 NFSLOCKV4ROOTMUTEX(); 2507 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2508 NFSUNLOCKV4ROOTMUTEX(); 2509 } 2510 goto out; 2511 } 2512 } 2513 2514 /* 2515 * Check for a conflicting delegation. If one is found, call 2516 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2517 * been set yet, it will get the lock. Otherwise, it will recall 2518 * the delegation. Then, we try try again... 2519 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2520 * isn't a conflict.) 2521 * I currently believe the conflict algorithm to be: 2522 * For Open with Read Access and Deny None 2523 * - there is a conflict iff a different client has a write delegation 2524 * For Open with other Write Access or any Deny except None 2525 * - there is a conflict if a different client has any delegation 2526 * - there is a conflict if the same client has a read delegation 2527 * (The current concensus is that this last case should be 2528 * considered a conflict since the client with a read delegation 2529 * could have done an Open with ReadAccess and WriteDeny 2530 * locally and then not have checked for the WriteDeny.) 2531 * Don't check for a Reclaim, since that will be dealt with 2532 * by nfsrv_openctrl(). 2533 */ 2534 if (!(new_stp->ls_flags & 2535 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2536 stp = LIST_FIRST(&lfp->lf_deleg); 2537 while (stp != LIST_END(&lfp->lf_deleg)) { 2538 nstp = LIST_NEXT(stp, ls_file); 2539 if ((readonly && stp->ls_clp != clp && 2540 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2541 (!readonly && (stp->ls_clp != clp || 2542 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2543 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2544 if (ret) { 2545 /* 2546 * nfsrv_delegconflict() unlocks state 2547 * when it returns non-zero. 2548 */ 2549 if (ret == -1) 2550 goto tryagain; 2551 error = ret; 2552 goto out; 2553 } 2554 } 2555 stp = nstp; 2556 } 2557 } 2558 NFSUNLOCKSTATE(); 2559 if (haslock) { 2560 NFSLOCKV4ROOTMUTEX(); 2561 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2562 NFSUNLOCKV4ROOTMUTEX(); 2563 } 2564 2565out: 2566 NFSEXITCODE2(error, nd); 2567 return (error); 2568} 2569 2570/* 2571 * Open control function to create/update open state for an open. 2572 */ 2573APPLESTATIC int 2574nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2575 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2576 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2577 NFSPROC_T *p, u_quad_t filerev) 2578{ 2579 struct nfsstate *new_stp = *new_stpp; 2580 struct nfsstate *stp, *nstp; 2581 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2582 struct nfslockfile *lfp, *new_lfp; 2583 struct nfsclient *clp; 2584 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2585 int readonly = 0, cbret = 1, getfhret = 0; 2586 int gotstate = 0, len = 0; 2587 u_char *clidp = NULL; 2588 2589 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2590 readonly = 1; 2591 /* 2592 * Check for restart conditions (client and server). 2593 * (Paranoia, should have been detected by nfsrv_opencheck().) 2594 * If an error does show up, return NFSERR_EXPIRED, since the 2595 * the seqid# has already been incremented. 2596 */ 2597 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2598 &new_stp->ls_stateid, 0); 2599 if (error) { 2600 printf("Nfsd: openctrl unexpected restart err=%d\n", 2601 error); 2602 error = NFSERR_EXPIRED; 2603 goto out; 2604 } 2605 2606 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 2607tryagain: 2608 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2609 M_NFSDLOCKFILE, M_WAITOK); 2610 MALLOC(new_open, struct nfsstate *, sizeof (struct nfsstate), 2611 M_NFSDSTATE, M_WAITOK); 2612 MALLOC(new_deleg, struct nfsstate *, sizeof (struct nfsstate), 2613 M_NFSDSTATE, M_WAITOK); 2614 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2615 NULL, p); 2616 NFSLOCKSTATE(); 2617 /* 2618 * Get the client structure. Since the linked lists could be changed 2619 * by other nfsd processes if this process does a tsleep(), one of 2620 * two things must be done. 2621 * 1 - don't tsleep() 2622 * or 2623 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2624 * before using the lists, since this lock stops the other 2625 * nfsd. This should only be used for rare cases, since it 2626 * essentially single threads the nfsd. 2627 * At this time, it is only done for cases where the stable 2628 * storage file must be written prior to completion of state 2629 * expiration. 2630 */ 2631 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2632 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2633 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2634 clp->lc_program) { 2635 /* 2636 * This happens on the first open for a client 2637 * that supports callbacks. 2638 */ 2639 NFSUNLOCKSTATE(); 2640 /* 2641 * Although nfsrv_docallback() will sleep, clp won't 2642 * go away, since they are only removed when the 2643 * nfsv4_lock() has blocked the nfsd threads. The 2644 * fields in clp can change, but having multiple 2645 * threads do this Null callback RPC should be 2646 * harmless. 2647 */ 2648 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2649 NULL, 0, NULL, NULL, NULL, p); 2650 NFSLOCKSTATE(); 2651 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2652 if (!cbret) 2653 clp->lc_flags |= LCL_CALLBACKSON; 2654 } 2655 2656 /* 2657 * Look up the open owner. See if it needs confirmation and 2658 * check the seq#, as required. 2659 */ 2660 if (!error) 2661 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2662 2663 if (error) { 2664 NFSUNLOCKSTATE(); 2665 printf("Nfsd: openctrl unexpected state err=%d\n", 2666 error); 2667 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2668 free((caddr_t)new_open, M_NFSDSTATE); 2669 free((caddr_t)new_deleg, M_NFSDSTATE); 2670 if (haslock) { 2671 NFSLOCKV4ROOTMUTEX(); 2672 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2673 NFSUNLOCKV4ROOTMUTEX(); 2674 } 2675 error = NFSERR_EXPIRED; 2676 goto out; 2677 } 2678 2679 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2680 nfsrv_markstable(clp); 2681 2682 /* 2683 * Get the structure for the underlying file. 2684 */ 2685 if (getfhret) 2686 error = getfhret; 2687 else 2688 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2689 NULL, 0); 2690 if (new_lfp) 2691 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2692 if (error) { 2693 NFSUNLOCKSTATE(); 2694 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2695 error); 2696 free((caddr_t)new_open, M_NFSDSTATE); 2697 free((caddr_t)new_deleg, M_NFSDSTATE); 2698 if (haslock) { 2699 NFSLOCKV4ROOTMUTEX(); 2700 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2701 NFSUNLOCKV4ROOTMUTEX(); 2702 } 2703 goto out; 2704 } 2705 2706 /* 2707 * Search for a conflicting open/share. 2708 */ 2709 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2710 /* 2711 * For Delegate_Cur, search for the matching Delegation, 2712 * which indicates no conflict. 2713 * An old delegation should have been recovered by the 2714 * client doing a Claim_DELEGATE_Prev, so I won't let 2715 * it match and return NFSERR_EXPIRED. Should I let it 2716 * match? 2717 */ 2718 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2719 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2720 (((nd->nd_flag & ND_NFSV41) != 0 && 2721 stateidp->seqid == 0) || 2722 stateidp->seqid == stp->ls_stateid.seqid) && 2723 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2724 NFSX_STATEIDOTHER)) 2725 break; 2726 } 2727 if (stp == LIST_END(&lfp->lf_deleg) || 2728 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2729 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2730 NFSUNLOCKSTATE(); 2731 printf("Nfsd openctrl unexpected expiry\n"); 2732 free((caddr_t)new_open, M_NFSDSTATE); 2733 free((caddr_t)new_deleg, M_NFSDSTATE); 2734 if (haslock) { 2735 NFSLOCKV4ROOTMUTEX(); 2736 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2737 NFSUNLOCKV4ROOTMUTEX(); 2738 } 2739 error = NFSERR_EXPIRED; 2740 goto out; 2741 } 2742 2743 /* 2744 * Don't issue a Delegation, since one already exists and 2745 * delay delegation timeout, as required. 2746 */ 2747 delegate = 0; 2748 nfsrv_delaydelegtimeout(stp); 2749 } 2750 2751 /* 2752 * Check for access/deny bit conflicts. I also check for the 2753 * same owner, since the client might not have bothered to check. 2754 * Also, note an open for the same file and owner, if found, 2755 * which is all we do here for Delegate_Cur, since conflict 2756 * checking is already done. 2757 */ 2758 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2759 if (ownerstp && stp->ls_openowner == ownerstp) 2760 openstp = stp; 2761 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2762 /* 2763 * If another client has the file open, the only 2764 * delegation that can be issued is a Read delegation 2765 * and only if it is a Read open with Deny none. 2766 */ 2767 if (clp != stp->ls_clp) { 2768 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2769 NFSLCK_READACCESS) 2770 writedeleg = 0; 2771 else 2772 delegate = 0; 2773 } 2774 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2775 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2776 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2777 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2778 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2779 if (ret == 1) { 2780 /* 2781 * nfsrv_clientconflict() unlocks state 2782 * when it returns non-zero. 2783 */ 2784 free((caddr_t)new_open, M_NFSDSTATE); 2785 free((caddr_t)new_deleg, M_NFSDSTATE); 2786 openstp = NULL; 2787 goto tryagain; 2788 } 2789 if (ret == 2) 2790 error = NFSERR_PERM; 2791 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2792 error = NFSERR_RECLAIMCONFLICT; 2793 else 2794 error = NFSERR_SHAREDENIED; 2795 if (ret == 0) 2796 NFSUNLOCKSTATE(); 2797 if (haslock) { 2798 NFSLOCKV4ROOTMUTEX(); 2799 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2800 NFSUNLOCKV4ROOTMUTEX(); 2801 } 2802 free((caddr_t)new_open, M_NFSDSTATE); 2803 free((caddr_t)new_deleg, M_NFSDSTATE); 2804 printf("nfsd openctrl unexpected client cnfl\n"); 2805 goto out; 2806 } 2807 } 2808 } 2809 2810 /* 2811 * Check for a conflicting delegation. If one is found, call 2812 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2813 * been set yet, it will get the lock. Otherwise, it will recall 2814 * the delegation. Then, we try try again... 2815 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2816 * isn't a conflict.) 2817 * I currently believe the conflict algorithm to be: 2818 * For Open with Read Access and Deny None 2819 * - there is a conflict iff a different client has a write delegation 2820 * For Open with other Write Access or any Deny except None 2821 * - there is a conflict if a different client has any delegation 2822 * - there is a conflict if the same client has a read delegation 2823 * (The current concensus is that this last case should be 2824 * considered a conflict since the client with a read delegation 2825 * could have done an Open with ReadAccess and WriteDeny 2826 * locally and then not have checked for the WriteDeny.) 2827 */ 2828 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2829 stp = LIST_FIRST(&lfp->lf_deleg); 2830 while (stp != LIST_END(&lfp->lf_deleg)) { 2831 nstp = LIST_NEXT(stp, ls_file); 2832 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2833 writedeleg = 0; 2834 else 2835 delegate = 0; 2836 if ((readonly && stp->ls_clp != clp && 2837 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2838 (!readonly && (stp->ls_clp != clp || 2839 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2840 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2841 delegate = 2; 2842 } else { 2843 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2844 if (ret) { 2845 /* 2846 * nfsrv_delegconflict() unlocks state 2847 * when it returns non-zero. 2848 */ 2849 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2850 free((caddr_t)new_open, M_NFSDSTATE); 2851 free((caddr_t)new_deleg, M_NFSDSTATE); 2852 if (ret == -1) { 2853 openstp = NULL; 2854 goto tryagain; 2855 } 2856 error = ret; 2857 goto out; 2858 } 2859 } 2860 } 2861 stp = nstp; 2862 } 2863 } 2864 2865 /* 2866 * We only get here if there was no open that conflicted. 2867 * If an open for the owner exists, or in the access/deny bits. 2868 * Otherwise it is a new open. If the open_owner hasn't been 2869 * confirmed, replace the open with the new one needing confirmation, 2870 * otherwise add the open. 2871 */ 2872 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2873 /* 2874 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2875 * a match. If found, just move the old delegation to the current 2876 * delegation list and issue open. If not found, return 2877 * NFSERR_EXPIRED. 2878 */ 2879 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2880 if (stp->ls_lfp == lfp) { 2881 /* Found it */ 2882 if (stp->ls_clp != clp) 2883 panic("olddeleg clp"); 2884 LIST_REMOVE(stp, ls_list); 2885 LIST_REMOVE(stp, ls_hash); 2886 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2887 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 2888 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2889 clp->lc_clientid.lval[0]; 2890 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2891 clp->lc_clientid.lval[1]; 2892 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2893 nfsrv_nextstateindex(clp); 2894 stp->ls_compref = nd->nd_compref; 2895 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2896 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2897 stp->ls_stateid), stp, ls_hash); 2898 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2899 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2900 else 2901 *rflagsp |= NFSV4OPEN_READDELEGATE; 2902 clp->lc_delegtime = NFSD_MONOSEC + 2903 nfsrv_lease + NFSRV_LEASEDELTA; 2904 2905 /* 2906 * Now, do the associated open. 2907 */ 2908 new_open->ls_stateid.seqid = 1; 2909 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2910 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2911 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2912 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2913 NFSLCK_OPEN; 2914 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2915 new_open->ls_flags |= (NFSLCK_READACCESS | 2916 NFSLCK_WRITEACCESS); 2917 else 2918 new_open->ls_flags |= NFSLCK_READACCESS; 2919 new_open->ls_uid = new_stp->ls_uid; 2920 new_open->ls_lfp = lfp; 2921 new_open->ls_clp = clp; 2922 LIST_INIT(&new_open->ls_open); 2923 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2924 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2925 new_open, ls_hash); 2926 /* 2927 * and handle the open owner 2928 */ 2929 if (ownerstp) { 2930 new_open->ls_openowner = ownerstp; 2931 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 2932 } else { 2933 new_open->ls_openowner = new_stp; 2934 new_stp->ls_flags = 0; 2935 nfsrvd_refcache(new_stp->ls_op); 2936 new_stp->ls_noopens = 0; 2937 LIST_INIT(&new_stp->ls_open); 2938 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2939 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2940 *new_stpp = NULL; 2941 newnfsstats.srvopenowners++; 2942 nfsrv_openpluslock++; 2943 } 2944 openstp = new_open; 2945 new_open = NULL; 2946 newnfsstats.srvopens++; 2947 nfsrv_openpluslock++; 2948 break; 2949 } 2950 } 2951 if (stp == LIST_END(&clp->lc_olddeleg)) 2952 error = NFSERR_EXPIRED; 2953 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2954 /* 2955 * Scan to see that no delegation for this client and file 2956 * doesn't already exist. 2957 * There also shouldn't yet be an Open for this file and 2958 * openowner. 2959 */ 2960 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2961 if (stp->ls_clp == clp) 2962 break; 2963 } 2964 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 2965 /* 2966 * This is the Claim_Previous case with a delegation 2967 * type != Delegate_None. 2968 */ 2969 /* 2970 * First, add the delegation. (Although we must issue the 2971 * delegation, we can also ask for an immediate return.) 2972 */ 2973 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 2974 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 2975 clp->lc_clientid.lval[0]; 2976 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 2977 clp->lc_clientid.lval[1]; 2978 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 2979 nfsrv_nextstateindex(clp); 2980 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 2981 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2982 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2983 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2984 nfsrv_writedelegcnt++; 2985 } else { 2986 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2987 NFSLCK_READACCESS); 2988 *rflagsp |= NFSV4OPEN_READDELEGATE; 2989 } 2990 new_deleg->ls_uid = new_stp->ls_uid; 2991 new_deleg->ls_lfp = lfp; 2992 new_deleg->ls_clp = clp; 2993 new_deleg->ls_filerev = filerev; 2994 new_deleg->ls_compref = nd->nd_compref; 2995 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2996 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2997 new_deleg->ls_stateid), new_deleg, ls_hash); 2998 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2999 new_deleg = NULL; 3000 if (delegate == 2 || nfsrv_issuedelegs == 0 || 3001 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3002 LCL_CALLBACKSON || 3003 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 3004 !NFSVNO_DELEGOK(vp)) 3005 *rflagsp |= NFSV4OPEN_RECALL; 3006 newnfsstats.srvdelegates++; 3007 nfsrv_openpluslock++; 3008 nfsrv_delegatecnt++; 3009 3010 /* 3011 * Now, do the associated open. 3012 */ 3013 new_open->ls_stateid.seqid = 1; 3014 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3015 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3016 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3017 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 3018 NFSLCK_OPEN; 3019 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 3020 new_open->ls_flags |= (NFSLCK_READACCESS | 3021 NFSLCK_WRITEACCESS); 3022 else 3023 new_open->ls_flags |= NFSLCK_READACCESS; 3024 new_open->ls_uid = new_stp->ls_uid; 3025 new_open->ls_lfp = lfp; 3026 new_open->ls_clp = clp; 3027 LIST_INIT(&new_open->ls_open); 3028 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3029 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3030 new_open, ls_hash); 3031 /* 3032 * and handle the open owner 3033 */ 3034 if (ownerstp) { 3035 new_open->ls_openowner = ownerstp; 3036 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3037 } else { 3038 new_open->ls_openowner = new_stp; 3039 new_stp->ls_flags = 0; 3040 nfsrvd_refcache(new_stp->ls_op); 3041 new_stp->ls_noopens = 0; 3042 LIST_INIT(&new_stp->ls_open); 3043 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3044 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3045 *new_stpp = NULL; 3046 newnfsstats.srvopenowners++; 3047 nfsrv_openpluslock++; 3048 } 3049 openstp = new_open; 3050 new_open = NULL; 3051 newnfsstats.srvopens++; 3052 nfsrv_openpluslock++; 3053 } else { 3054 error = NFSERR_RECLAIMCONFLICT; 3055 } 3056 } else if (ownerstp) { 3057 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 3058 /* Replace the open */ 3059 if (ownerstp->ls_op) 3060 nfsrvd_derefcache(ownerstp->ls_op); 3061 ownerstp->ls_op = new_stp->ls_op; 3062 nfsrvd_refcache(ownerstp->ls_op); 3063 ownerstp->ls_seq = new_stp->ls_seq; 3064 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3065 stp = LIST_FIRST(&ownerstp->ls_open); 3066 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3067 NFSLCK_OPEN; 3068 stp->ls_stateid.seqid = 1; 3069 stp->ls_uid = new_stp->ls_uid; 3070 if (lfp != stp->ls_lfp) { 3071 LIST_REMOVE(stp, ls_file); 3072 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 3073 stp->ls_lfp = lfp; 3074 } 3075 openstp = stp; 3076 } else if (openstp) { 3077 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 3078 openstp->ls_stateid.seqid++; 3079 if ((nd->nd_flag & ND_NFSV41) != 0 && 3080 openstp->ls_stateid.seqid == 0) 3081 openstp->ls_stateid.seqid = 1; 3082 3083 /* 3084 * This is where we can choose to issue a delegation. 3085 */ 3086 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3087 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3088 else if (nfsrv_issuedelegs == 0) 3089 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3090 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3091 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3092 else if (delegate == 0 || writedeleg == 0 || 3093 NFSVNO_EXRDONLY(exp) || (readonly != 0 && 3094 nfsrv_writedelegifpos == 0) || 3095 !NFSVNO_DELEGOK(vp) || 3096 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 || 3097 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3098 LCL_CALLBACKSON) 3099 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3100 else { 3101 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3102 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3103 = clp->lc_clientid.lval[0]; 3104 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3105 = clp->lc_clientid.lval[1]; 3106 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3107 = nfsrv_nextstateindex(clp); 3108 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3109 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3110 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3111 new_deleg->ls_uid = new_stp->ls_uid; 3112 new_deleg->ls_lfp = lfp; 3113 new_deleg->ls_clp = clp; 3114 new_deleg->ls_filerev = filerev; 3115 new_deleg->ls_compref = nd->nd_compref; 3116 nfsrv_writedelegcnt++; 3117 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3118 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3119 new_deleg->ls_stateid), new_deleg, ls_hash); 3120 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3121 new_deleg = NULL; 3122 newnfsstats.srvdelegates++; 3123 nfsrv_openpluslock++; 3124 nfsrv_delegatecnt++; 3125 } 3126 } else { 3127 new_open->ls_stateid.seqid = 1; 3128 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3129 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3130 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3131 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 3132 NFSLCK_OPEN; 3133 new_open->ls_uid = new_stp->ls_uid; 3134 new_open->ls_openowner = ownerstp; 3135 new_open->ls_lfp = lfp; 3136 new_open->ls_clp = clp; 3137 LIST_INIT(&new_open->ls_open); 3138 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3139 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3140 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3141 new_open, ls_hash); 3142 openstp = new_open; 3143 new_open = NULL; 3144 newnfsstats.srvopens++; 3145 nfsrv_openpluslock++; 3146 3147 /* 3148 * This is where we can choose to issue a delegation. 3149 */ 3150 if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3151 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3152 else if (nfsrv_issuedelegs == 0) 3153 *rflagsp |= NFSV4OPEN_WDSUPPFTYPE; 3154 else if (NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3155 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3156 else if (delegate == 0 || (writedeleg == 0 && 3157 readonly == 0) || !NFSVNO_DELEGOK(vp) || 3158 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3159 LCL_CALLBACKSON) 3160 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3161 else { 3162 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3163 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3164 = clp->lc_clientid.lval[0]; 3165 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3166 = clp->lc_clientid.lval[1]; 3167 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3168 = nfsrv_nextstateindex(clp); 3169 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3170 (nfsrv_writedelegifpos || !readonly) && 3171 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) { 3172 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3173 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3174 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3175 nfsrv_writedelegcnt++; 3176 } else { 3177 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3178 NFSLCK_READACCESS); 3179 *rflagsp |= NFSV4OPEN_READDELEGATE; 3180 } 3181 new_deleg->ls_uid = new_stp->ls_uid; 3182 new_deleg->ls_lfp = lfp; 3183 new_deleg->ls_clp = clp; 3184 new_deleg->ls_filerev = filerev; 3185 new_deleg->ls_compref = nd->nd_compref; 3186 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3187 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3188 new_deleg->ls_stateid), new_deleg, ls_hash); 3189 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3190 new_deleg = NULL; 3191 newnfsstats.srvdelegates++; 3192 nfsrv_openpluslock++; 3193 nfsrv_delegatecnt++; 3194 } 3195 } 3196 } else { 3197 /* 3198 * New owner case. Start the open_owner sequence with a 3199 * Needs confirmation (unless a reclaim) and hang the 3200 * new open off it. 3201 */ 3202 new_open->ls_stateid.seqid = 1; 3203 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3204 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3205 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3206 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3207 NFSLCK_OPEN; 3208 new_open->ls_uid = new_stp->ls_uid; 3209 LIST_INIT(&new_open->ls_open); 3210 new_open->ls_openowner = new_stp; 3211 new_open->ls_lfp = lfp; 3212 new_open->ls_clp = clp; 3213 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3214 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3215 new_stp->ls_flags = 0; 3216 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3217 /* NFSv4.1 never needs confirmation. */ 3218 new_stp->ls_flags = 0; 3219 3220 /* 3221 * This is where we can choose to issue a delegation. 3222 */ 3223 if (delegate && nfsrv_issuedelegs && 3224 (writedeleg || readonly) && 3225 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 3226 LCL_CALLBACKSON && 3227 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 3228 NFSVNO_DELEGOK(vp) && 3229 ((nd->nd_flag & ND_NFSV41) == 0 || 3230 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) { 3231 new_deleg->ls_stateid.seqid = 3232 delegstateidp->seqid = 1; 3233 new_deleg->ls_stateid.other[0] = 3234 delegstateidp->other[0] 3235 = clp->lc_clientid.lval[0]; 3236 new_deleg->ls_stateid.other[1] = 3237 delegstateidp->other[1] 3238 = clp->lc_clientid.lval[1]; 3239 new_deleg->ls_stateid.other[2] = 3240 delegstateidp->other[2] 3241 = nfsrv_nextstateindex(clp); 3242 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3243 (nfsrv_writedelegifpos || !readonly) && 3244 ((nd->nd_flag & ND_NFSV41) == 0 || 3245 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 3246 0)) { 3247 new_deleg->ls_flags = 3248 (NFSLCK_DELEGWRITE | 3249 NFSLCK_READACCESS | 3250 NFSLCK_WRITEACCESS); 3251 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3252 nfsrv_writedelegcnt++; 3253 } else { 3254 new_deleg->ls_flags = 3255 (NFSLCK_DELEGREAD | 3256 NFSLCK_READACCESS); 3257 *rflagsp |= NFSV4OPEN_READDELEGATE; 3258 } 3259 new_deleg->ls_uid = new_stp->ls_uid; 3260 new_deleg->ls_lfp = lfp; 3261 new_deleg->ls_clp = clp; 3262 new_deleg->ls_filerev = filerev; 3263 new_deleg->ls_compref = nd->nd_compref; 3264 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, 3265 ls_file); 3266 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3267 new_deleg->ls_stateid), new_deleg, ls_hash); 3268 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, 3269 ls_list); 3270 new_deleg = NULL; 3271 newnfsstats.srvdelegates++; 3272 nfsrv_openpluslock++; 3273 nfsrv_delegatecnt++; 3274 } 3275 /* 3276 * Since NFSv4.1 never does an OpenConfirm, the first 3277 * open state will be acquired here. 3278 */ 3279 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3280 clp->lc_flags |= LCL_STAMPEDSTABLE; 3281 len = clp->lc_idlen; 3282 NFSBCOPY(clp->lc_id, clidp, len); 3283 gotstate = 1; 3284 } 3285 } else { 3286 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3287 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3288 } 3289 nfsrvd_refcache(new_stp->ls_op); 3290 new_stp->ls_noopens = 0; 3291 LIST_INIT(&new_stp->ls_open); 3292 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3293 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3294 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3295 new_open, ls_hash); 3296 openstp = new_open; 3297 new_open = NULL; 3298 *new_stpp = NULL; 3299 newnfsstats.srvopens++; 3300 nfsrv_openpluslock++; 3301 newnfsstats.srvopenowners++; 3302 nfsrv_openpluslock++; 3303 } 3304 if (!error) { 3305 stateidp->seqid = openstp->ls_stateid.seqid; 3306 stateidp->other[0] = openstp->ls_stateid.other[0]; 3307 stateidp->other[1] = openstp->ls_stateid.other[1]; 3308 stateidp->other[2] = openstp->ls_stateid.other[2]; 3309 } 3310 NFSUNLOCKSTATE(); 3311 if (haslock) { 3312 NFSLOCKV4ROOTMUTEX(); 3313 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3314 NFSUNLOCKV4ROOTMUTEX(); 3315 } 3316 if (new_open) 3317 FREE((caddr_t)new_open, M_NFSDSTATE); 3318 if (new_deleg) 3319 FREE((caddr_t)new_deleg, M_NFSDSTATE); 3320 3321 /* 3322 * If the NFSv4.1 client just acquired its first open, write a timestamp 3323 * to the stable storage file. 3324 */ 3325 if (gotstate != 0) { 3326 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3327 nfsrv_backupstable(); 3328 } 3329 3330out: 3331 free(clidp, M_TEMP); 3332 NFSEXITCODE2(error, nd); 3333 return (error); 3334} 3335 3336/* 3337 * Open update. Does the confirm, downgrade and close. 3338 */ 3339APPLESTATIC int 3340nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3341 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p) 3342{ 3343 struct nfsstate *stp, *ownerstp; 3344 struct nfsclient *clp; 3345 struct nfslockfile *lfp; 3346 u_int32_t bits; 3347 int error = 0, gotstate = 0, len = 0; 3348 u_char *clidp = NULL; 3349 3350 /* 3351 * Check for restart conditions (client and server). 3352 */ 3353 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3354 &new_stp->ls_stateid, 0); 3355 if (error) 3356 goto out; 3357 3358 clidp = malloc(NFSV4_OPAQUELIMIT, M_TEMP, M_WAITOK); 3359 NFSLOCKSTATE(); 3360 /* 3361 * Get the open structure via clientid and stateid. 3362 */ 3363 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3364 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3365 if (!error) 3366 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3367 new_stp->ls_flags, &stp); 3368 3369 /* 3370 * Sanity check the open. 3371 */ 3372 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3373 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3374 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3375 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3376 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3377 error = NFSERR_BADSTATEID; 3378 3379 if (!error) 3380 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3381 stp->ls_openowner, new_stp->ls_op); 3382 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3383 (((nd->nd_flag & ND_NFSV41) == 0 && 3384 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3385 ((nd->nd_flag & ND_NFSV41) != 0 && 3386 new_stp->ls_stateid.seqid != 0))) 3387 error = NFSERR_OLDSTATEID; 3388 if (!error && vnode_vtype(vp) != VREG) { 3389 if (vnode_vtype(vp) == VDIR) 3390 error = NFSERR_ISDIR; 3391 else 3392 error = NFSERR_INVAL; 3393 } 3394 3395 if (error) { 3396 /* 3397 * If a client tries to confirm an Open with a bad 3398 * seqid# and there are no byte range locks or other Opens 3399 * on the openowner, just throw it away, so the next use of the 3400 * openowner will start a fresh seq#. 3401 */ 3402 if (error == NFSERR_BADSEQID && 3403 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3404 nfsrv_nootherstate(stp)) 3405 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3406 NFSUNLOCKSTATE(); 3407 goto out; 3408 } 3409 3410 /* 3411 * Set the return stateid. 3412 */ 3413 stateidp->seqid = stp->ls_stateid.seqid + 1; 3414 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3415 stateidp->seqid = 1; 3416 stateidp->other[0] = stp->ls_stateid.other[0]; 3417 stateidp->other[1] = stp->ls_stateid.other[1]; 3418 stateidp->other[2] = stp->ls_stateid.other[2]; 3419 /* 3420 * Now, handle the three cases. 3421 */ 3422 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3423 /* 3424 * If the open doesn't need confirmation, it seems to me that 3425 * there is a client error, but I'll just log it and keep going? 3426 */ 3427 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3428 printf("Nfsv4d: stray open confirm\n"); 3429 stp->ls_openowner->ls_flags = 0; 3430 stp->ls_stateid.seqid++; 3431 if ((nd->nd_flag & ND_NFSV41) != 0 && 3432 stp->ls_stateid.seqid == 0) 3433 stp->ls_stateid.seqid = 1; 3434 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3435 clp->lc_flags |= LCL_STAMPEDSTABLE; 3436 len = clp->lc_idlen; 3437 NFSBCOPY(clp->lc_id, clidp, len); 3438 gotstate = 1; 3439 } 3440 NFSUNLOCKSTATE(); 3441 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3442 ownerstp = stp->ls_openowner; 3443 lfp = stp->ls_lfp; 3444 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3445 /* Get the lf lock */ 3446 nfsrv_locklf(lfp); 3447 NFSUNLOCKSTATE(); 3448 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate"); 3449 NFSVOPUNLOCK(vp, 0); 3450 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3451 NFSLOCKSTATE(); 3452 nfsrv_unlocklf(lfp); 3453 NFSUNLOCKSTATE(); 3454 } 3455 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3456 } else { 3457 (void) nfsrv_freeopen(stp, NULL, 0, p); 3458 NFSUNLOCKSTATE(); 3459 } 3460 } else { 3461 /* 3462 * Update the share bits, making sure that the new set are a 3463 * subset of the old ones. 3464 */ 3465 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3466 if (~(stp->ls_flags) & bits) { 3467 NFSUNLOCKSTATE(); 3468 error = NFSERR_INVAL; 3469 goto out; 3470 } 3471 stp->ls_flags = (bits | NFSLCK_OPEN); 3472 stp->ls_stateid.seqid++; 3473 if ((nd->nd_flag & ND_NFSV41) != 0 && 3474 stp->ls_stateid.seqid == 0) 3475 stp->ls_stateid.seqid = 1; 3476 NFSUNLOCKSTATE(); 3477 } 3478 3479 /* 3480 * If the client just confirmed its first open, write a timestamp 3481 * to the stable storage file. 3482 */ 3483 if (gotstate != 0) { 3484 nfsrv_writestable(clidp, len, NFSNST_NEWSTATE, p); 3485 nfsrv_backupstable(); 3486 } 3487 3488out: 3489 free(clidp, M_TEMP); 3490 NFSEXITCODE2(error, nd); 3491 return (error); 3492} 3493 3494/* 3495 * Delegation update. Does the purge and return. 3496 */ 3497APPLESTATIC int 3498nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3499 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3500 NFSPROC_T *p) 3501{ 3502 struct nfsstate *stp; 3503 struct nfsclient *clp; 3504 int error = 0; 3505 fhandle_t fh; 3506 3507 /* 3508 * Do a sanity check against the file handle for DelegReturn. 3509 */ 3510 if (vp) { 3511 error = nfsvno_getfh(vp, &fh, p); 3512 if (error) 3513 goto out; 3514 } 3515 /* 3516 * Check for restart conditions (client and server). 3517 */ 3518 if (op == NFSV4OP_DELEGRETURN) 3519 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3520 stateidp, 0); 3521 else 3522 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3523 stateidp, 0); 3524 3525 NFSLOCKSTATE(); 3526 /* 3527 * Get the open structure via clientid and stateid. 3528 */ 3529 if (!error) 3530 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3531 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3532 if (error) { 3533 if (error == NFSERR_CBPATHDOWN) 3534 error = 0; 3535 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3536 error = NFSERR_STALESTATEID; 3537 } 3538 if (!error && op == NFSV4OP_DELEGRETURN) { 3539 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3540 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3541 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3542 error = NFSERR_OLDSTATEID; 3543 } 3544 /* 3545 * NFSERR_EXPIRED means that the state has gone away, 3546 * so Delegations have been purged. Just return ok. 3547 */ 3548 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3549 NFSUNLOCKSTATE(); 3550 error = 0; 3551 goto out; 3552 } 3553 if (error) { 3554 NFSUNLOCKSTATE(); 3555 goto out; 3556 } 3557 3558 if (op == NFSV4OP_DELEGRETURN) { 3559 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3560 sizeof (fhandle_t))) { 3561 NFSUNLOCKSTATE(); 3562 error = NFSERR_BADSTATEID; 3563 goto out; 3564 } 3565 nfsrv_freedeleg(stp); 3566 } else { 3567 nfsrv_freedeleglist(&clp->lc_olddeleg); 3568 } 3569 NFSUNLOCKSTATE(); 3570 error = 0; 3571 3572out: 3573 NFSEXITCODE(error); 3574 return (error); 3575} 3576 3577/* 3578 * Release lock owner. 3579 */ 3580APPLESTATIC int 3581nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3582 NFSPROC_T *p) 3583{ 3584 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3585 struct nfsclient *clp; 3586 int error = 0; 3587 3588 /* 3589 * Check for restart conditions (client and server). 3590 */ 3591 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3592 &new_stp->ls_stateid, 0); 3593 if (error) 3594 goto out; 3595 3596 NFSLOCKSTATE(); 3597 /* 3598 * Get the lock owner by name. 3599 */ 3600 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3601 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3602 if (error) { 3603 NFSUNLOCKSTATE(); 3604 goto out; 3605 } 3606 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3607 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3608 stp = LIST_FIRST(&openstp->ls_open); 3609 while (stp != LIST_END(&openstp->ls_open)) { 3610 nstp = LIST_NEXT(stp, ls_list); 3611 /* 3612 * If the owner matches, check for locks and 3613 * then free or return an error. 3614 */ 3615 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3616 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3617 stp->ls_ownerlen)){ 3618 if (LIST_EMPTY(&stp->ls_lock)) { 3619 nfsrv_freelockowner(stp, NULL, 0, p); 3620 } else { 3621 NFSUNLOCKSTATE(); 3622 error = NFSERR_LOCKSHELD; 3623 goto out; 3624 } 3625 } 3626 stp = nstp; 3627 } 3628 } 3629 } 3630 NFSUNLOCKSTATE(); 3631 3632out: 3633 NFSEXITCODE(error); 3634 return (error); 3635} 3636 3637/* 3638 * Get the file handle for a lock structure. 3639 */ 3640static int 3641nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3642 fhandle_t *nfhp, NFSPROC_T *p) 3643{ 3644 fhandle_t *fhp = NULL; 3645 int error; 3646 3647 /* 3648 * For lock, use the new nfslock structure, otherwise just 3649 * a fhandle_t on the stack. 3650 */ 3651 if (flags & NFSLCK_OPEN) { 3652 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3653 fhp = &new_lfp->lf_fh; 3654 } else if (nfhp) { 3655 fhp = nfhp; 3656 } else { 3657 panic("nfsrv_getlockfh"); 3658 } 3659 error = nfsvno_getfh(vp, fhp, p); 3660 NFSEXITCODE(error); 3661 return (error); 3662} 3663 3664/* 3665 * Get an nfs lock structure. Allocate one, as required, and return a 3666 * pointer to it. 3667 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3668 */ 3669static int 3670nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3671 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3672{ 3673 struct nfslockfile *lfp; 3674 fhandle_t *fhp = NULL, *tfhp; 3675 struct nfslockhashhead *hp; 3676 struct nfslockfile *new_lfp = NULL; 3677 3678 /* 3679 * For lock, use the new nfslock structure, otherwise just 3680 * a fhandle_t on the stack. 3681 */ 3682 if (flags & NFSLCK_OPEN) { 3683 new_lfp = *new_lfpp; 3684 fhp = &new_lfp->lf_fh; 3685 } else if (nfhp) { 3686 fhp = nfhp; 3687 } else { 3688 panic("nfsrv_getlockfile"); 3689 } 3690 3691 hp = NFSLOCKHASH(fhp); 3692 LIST_FOREACH(lfp, hp, lf_hash) { 3693 tfhp = &lfp->lf_fh; 3694 if (NFSVNO_CMPFH(fhp, tfhp)) { 3695 if (lockit) 3696 nfsrv_locklf(lfp); 3697 *lfpp = lfp; 3698 return (0); 3699 } 3700 } 3701 if (!(flags & NFSLCK_OPEN)) 3702 return (-1); 3703 3704 /* 3705 * No match, so chain the new one into the list. 3706 */ 3707 LIST_INIT(&new_lfp->lf_open); 3708 LIST_INIT(&new_lfp->lf_lock); 3709 LIST_INIT(&new_lfp->lf_deleg); 3710 LIST_INIT(&new_lfp->lf_locallock); 3711 LIST_INIT(&new_lfp->lf_rollback); 3712 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3713 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3714 new_lfp->lf_usecount = 0; 3715 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3716 *lfpp = new_lfp; 3717 *new_lfpp = NULL; 3718 return (0); 3719} 3720 3721/* 3722 * This function adds a nfslock lock structure to the list for the associated 3723 * nfsstate and nfslockfile structures. It will be inserted after the 3724 * entry pointed at by insert_lop. 3725 */ 3726static void 3727nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3728 struct nfsstate *stp, struct nfslockfile *lfp) 3729{ 3730 struct nfslock *lop, *nlop; 3731 3732 new_lop->lo_stp = stp; 3733 new_lop->lo_lfp = lfp; 3734 3735 if (stp != NULL) { 3736 /* Insert in increasing lo_first order */ 3737 lop = LIST_FIRST(&lfp->lf_lock); 3738 if (lop == LIST_END(&lfp->lf_lock) || 3739 new_lop->lo_first <= lop->lo_first) { 3740 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3741 } else { 3742 nlop = LIST_NEXT(lop, lo_lckfile); 3743 while (nlop != LIST_END(&lfp->lf_lock) && 3744 nlop->lo_first < new_lop->lo_first) { 3745 lop = nlop; 3746 nlop = LIST_NEXT(lop, lo_lckfile); 3747 } 3748 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3749 } 3750 } else { 3751 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3752 } 3753 3754 /* 3755 * Insert after insert_lop, which is overloaded as stp or lfp for 3756 * an empty list. 3757 */ 3758 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3759 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3760 else if ((struct nfsstate *)insert_lop == stp) 3761 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3762 else 3763 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3764 if (stp != NULL) { 3765 newnfsstats.srvlocks++; 3766 nfsrv_openpluslock++; 3767 } 3768} 3769 3770/* 3771 * This function updates the locking for a lock owner and given file. It 3772 * maintains a list of lock ranges ordered on increasing file offset that 3773 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3774 * It always adds new_lop to the list and sometimes uses the one pointed 3775 * at by other_lopp. 3776 */ 3777static void 3778nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3779 struct nfslock **other_lopp, struct nfslockfile *lfp) 3780{ 3781 struct nfslock *new_lop = *new_lopp; 3782 struct nfslock *lop, *tlop, *ilop; 3783 struct nfslock *other_lop = *other_lopp; 3784 int unlock = 0, myfile = 0; 3785 u_int64_t tmp; 3786 3787 /* 3788 * Work down the list until the lock is merged. 3789 */ 3790 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3791 unlock = 1; 3792 if (stp != NULL) { 3793 ilop = (struct nfslock *)stp; 3794 lop = LIST_FIRST(&stp->ls_lock); 3795 } else { 3796 ilop = (struct nfslock *)lfp; 3797 lop = LIST_FIRST(&lfp->lf_locallock); 3798 } 3799 while (lop != NULL) { 3800 /* 3801 * Only check locks for this file that aren't before the start of 3802 * new lock's range. 3803 */ 3804 if (lop->lo_lfp == lfp) { 3805 myfile = 1; 3806 if (lop->lo_end >= new_lop->lo_first) { 3807 if (new_lop->lo_end < lop->lo_first) { 3808 /* 3809 * If the new lock ends before the start of the 3810 * current lock's range, no merge, just insert 3811 * the new lock. 3812 */ 3813 break; 3814 } 3815 if (new_lop->lo_flags == lop->lo_flags || 3816 (new_lop->lo_first <= lop->lo_first && 3817 new_lop->lo_end >= lop->lo_end)) { 3818 /* 3819 * This lock can be absorbed by the new lock/unlock. 3820 * This happens when it covers the entire range 3821 * of the old lock or is contiguous 3822 * with the old lock and is of the same type or an 3823 * unlock. 3824 */ 3825 if (lop->lo_first < new_lop->lo_first) 3826 new_lop->lo_first = lop->lo_first; 3827 if (lop->lo_end > new_lop->lo_end) 3828 new_lop->lo_end = lop->lo_end; 3829 tlop = lop; 3830 lop = LIST_NEXT(lop, lo_lckowner); 3831 nfsrv_freenfslock(tlop); 3832 continue; 3833 } 3834 3835 /* 3836 * All these cases are for contiguous locks that are not the 3837 * same type, so they can't be merged. 3838 */ 3839 if (new_lop->lo_first <= lop->lo_first) { 3840 /* 3841 * This case is where the new lock overlaps with the 3842 * first part of the old lock. Move the start of the 3843 * old lock to just past the end of the new lock. The 3844 * new lock will be inserted in front of the old, since 3845 * ilop hasn't been updated. (We are done now.) 3846 */ 3847 lop->lo_first = new_lop->lo_end; 3848 break; 3849 } 3850 if (new_lop->lo_end >= lop->lo_end) { 3851 /* 3852 * This case is where the new lock overlaps with the 3853 * end of the old lock's range. Move the old lock's 3854 * end to just before the new lock's first and insert 3855 * the new lock after the old lock. 3856 * Might not be done yet, since the new lock could 3857 * overlap further locks with higher ranges. 3858 */ 3859 lop->lo_end = new_lop->lo_first; 3860 ilop = lop; 3861 lop = LIST_NEXT(lop, lo_lckowner); 3862 continue; 3863 } 3864 /* 3865 * The final case is where the new lock's range is in the 3866 * middle of the current lock's and splits the current lock 3867 * up. Use *other_lopp to handle the second part of the 3868 * split old lock range. (We are done now.) 3869 * For unlock, we use new_lop as other_lop and tmp, since 3870 * other_lop and new_lop are the same for this case. 3871 * We noted the unlock case above, so we don't need 3872 * new_lop->lo_flags any longer. 3873 */ 3874 tmp = new_lop->lo_first; 3875 if (other_lop == NULL) { 3876 if (!unlock) 3877 panic("nfsd srv update unlock"); 3878 other_lop = new_lop; 3879 *new_lopp = NULL; 3880 } 3881 other_lop->lo_first = new_lop->lo_end; 3882 other_lop->lo_end = lop->lo_end; 3883 other_lop->lo_flags = lop->lo_flags; 3884 other_lop->lo_stp = stp; 3885 other_lop->lo_lfp = lfp; 3886 lop->lo_end = tmp; 3887 nfsrv_insertlock(other_lop, lop, stp, lfp); 3888 *other_lopp = NULL; 3889 ilop = lop; 3890 break; 3891 } 3892 } 3893 ilop = lop; 3894 lop = LIST_NEXT(lop, lo_lckowner); 3895 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3896 break; 3897 } 3898 3899 /* 3900 * Insert the new lock in the list at the appropriate place. 3901 */ 3902 if (!unlock) { 3903 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3904 *new_lopp = NULL; 3905 } 3906} 3907 3908/* 3909 * This function handles sequencing of locks, etc. 3910 * It returns an error that indicates what the caller should do. 3911 */ 3912static int 3913nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3914 struct nfsstate *stp, struct nfsrvcache *op) 3915{ 3916 int error = 0; 3917 3918 if ((nd->nd_flag & ND_NFSV41) != 0) 3919 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 3920 goto out; 3921 if (op != nd->nd_rp) 3922 panic("nfsrvstate checkseqid"); 3923 if (!(op->rc_flag & RC_INPROG)) 3924 panic("nfsrvstate not inprog"); 3925 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3926 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3927 panic("nfsrvstate op refcnt"); 3928 } 3929 if ((stp->ls_seq + 1) == seqid) { 3930 if (stp->ls_op) 3931 nfsrvd_derefcache(stp->ls_op); 3932 stp->ls_op = op; 3933 nfsrvd_refcache(op); 3934 stp->ls_seq = seqid; 3935 goto out; 3936 } else if (stp->ls_seq == seqid && stp->ls_op && 3937 op->rc_xid == stp->ls_op->rc_xid && 3938 op->rc_refcnt == 0 && 3939 op->rc_reqlen == stp->ls_op->rc_reqlen && 3940 op->rc_cksum == stp->ls_op->rc_cksum) { 3941 if (stp->ls_op->rc_flag & RC_INPROG) { 3942 error = NFSERR_DONTREPLY; 3943 goto out; 3944 } 3945 nd->nd_rp = stp->ls_op; 3946 nd->nd_rp->rc_flag |= RC_INPROG; 3947 nfsrvd_delcache(op); 3948 error = NFSERR_REPLYFROMCACHE; 3949 goto out; 3950 } 3951 error = NFSERR_BADSEQID; 3952 3953out: 3954 NFSEXITCODE2(error, nd); 3955 return (error); 3956} 3957 3958/* 3959 * Get the client ip address for callbacks. If the strings can't be parsed, 3960 * just set lc_program to 0 to indicate no callbacks are possible. 3961 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3962 * the address to the client's transport address. This won't be used 3963 * for callbacks, but can be printed out by newnfsstats for info.) 3964 * Return error if the xdr can't be parsed, 0 otherwise. 3965 */ 3966APPLESTATIC int 3967nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3968{ 3969 u_int32_t *tl; 3970 u_char *cp, *cp2; 3971 int i, j, maxalen = 0, minalen = 0; 3972 sa_family_t af; 3973#ifdef INET 3974 struct sockaddr_in *rin, *sin; 3975#endif 3976#ifdef INET6 3977 struct sockaddr_in6 *rin6, *sin6; 3978#endif 3979 u_char *addr; 3980 int error = 0, cantparse = 0; 3981 union { 3982 in_addr_t ival; 3983 u_char cval[4]; 3984 } ip; 3985 union { 3986 in_port_t sval; 3987 u_char cval[2]; 3988 } port; 3989 3990 /* 8 is the maximum length of the port# string. */ 3991 addr = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK); 3992 clp->lc_req.nr_client = NULL; 3993 clp->lc_req.nr_lock = 0; 3994 af = AF_UNSPEC; 3995 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3996 i = fxdr_unsigned(int, *tl); 3997 if (i >= 3 && i <= 4) { 3998 error = nfsrv_mtostr(nd, addr, i); 3999 if (error) 4000 goto nfsmout; 4001#ifdef INET 4002 if (!strcmp(addr, "tcp")) { 4003 clp->lc_flags |= LCL_TCPCALLBACK; 4004 clp->lc_req.nr_sotype = SOCK_STREAM; 4005 clp->lc_req.nr_soproto = IPPROTO_TCP; 4006 af = AF_INET; 4007 } else if (!strcmp(addr, "udp")) { 4008 clp->lc_req.nr_sotype = SOCK_DGRAM; 4009 clp->lc_req.nr_soproto = IPPROTO_UDP; 4010 af = AF_INET; 4011 } 4012#endif 4013#ifdef INET6 4014 if (af == AF_UNSPEC) { 4015 if (!strcmp(addr, "tcp6")) { 4016 clp->lc_flags |= LCL_TCPCALLBACK; 4017 clp->lc_req.nr_sotype = SOCK_STREAM; 4018 clp->lc_req.nr_soproto = IPPROTO_TCP; 4019 af = AF_INET6; 4020 } else if (!strcmp(addr, "udp6")) { 4021 clp->lc_req.nr_sotype = SOCK_DGRAM; 4022 clp->lc_req.nr_soproto = IPPROTO_UDP; 4023 af = AF_INET6; 4024 } 4025 } 4026#endif 4027 if (af == AF_UNSPEC) { 4028 cantparse = 1; 4029 } 4030 } else { 4031 cantparse = 1; 4032 if (i > 0) { 4033 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4034 if (error) 4035 goto nfsmout; 4036 } 4037 } 4038 /* 4039 * The caller has allocated clp->lc_req.nr_nam to be large enough 4040 * for either AF_INET or AF_INET6 and zeroed out the contents. 4041 * maxalen is set to the maximum length of the host IP address string 4042 * plus 8 for the maximum length of the port#. 4043 * minalen is set to the minimum length of the host IP address string 4044 * plus 4 for the minimum length of the port#. 4045 * These lengths do not include NULL termination, 4046 * so INET[6]_ADDRSTRLEN - 1 is used in the calculations. 4047 */ 4048 switch (af) { 4049#ifdef INET 4050 case AF_INET: 4051 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4052 rin->sin_family = AF_INET; 4053 rin->sin_len = sizeof(struct sockaddr_in); 4054 maxalen = INET_ADDRSTRLEN - 1 + 8; 4055 minalen = 7 + 4; 4056 break; 4057#endif 4058#ifdef INET6 4059 case AF_INET6: 4060 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4061 rin6->sin6_family = AF_INET6; 4062 rin6->sin6_len = sizeof(struct sockaddr_in6); 4063 maxalen = INET6_ADDRSTRLEN - 1 + 8; 4064 minalen = 3 + 4; 4065 break; 4066#endif 4067 } 4068 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 4069 i = fxdr_unsigned(int, *tl); 4070 if (i < 0) { 4071 error = NFSERR_BADXDR; 4072 goto nfsmout; 4073 } else if (i == 0) { 4074 cantparse = 1; 4075 } else if (!cantparse && i <= maxalen && i >= minalen) { 4076 error = nfsrv_mtostr(nd, addr, i); 4077 if (error) 4078 goto nfsmout; 4079 4080 /* 4081 * Parse out the address fields. We expect 6 decimal numbers 4082 * separated by '.'s for AF_INET and two decimal numbers 4083 * preceeded by '.'s for AF_INET6. 4084 */ 4085 cp = NULL; 4086 switch (af) { 4087#ifdef INET6 4088 /* 4089 * For AF_INET6, first parse the host address. 4090 */ 4091 case AF_INET6: 4092 cp = strchr(addr, '.'); 4093 if (cp != NULL) { 4094 *cp++ = '\0'; 4095 if (inet_pton(af, addr, &rin6->sin6_addr) == 1) 4096 i = 4; 4097 else { 4098 cp = NULL; 4099 cantparse = 1; 4100 } 4101 } 4102 break; 4103#endif 4104#ifdef INET 4105 case AF_INET: 4106 cp = addr; 4107 i = 0; 4108 break; 4109#endif 4110 } 4111 while (cp != NULL && *cp && i < 6) { 4112 cp2 = cp; 4113 while (*cp2 && *cp2 != '.') 4114 cp2++; 4115 if (*cp2) 4116 *cp2++ = '\0'; 4117 else if (i != 5) { 4118 cantparse = 1; 4119 break; 4120 } 4121 j = nfsrv_getipnumber(cp); 4122 if (j >= 0) { 4123 if (i < 4) 4124 ip.cval[3 - i] = j; 4125 else 4126 port.cval[5 - i] = j; 4127 } else { 4128 cantparse = 1; 4129 break; 4130 } 4131 cp = cp2; 4132 i++; 4133 } 4134 if (!cantparse) { 4135 /* 4136 * The host address INADDR_ANY is (mis)used to indicate 4137 * "there is no valid callback address". 4138 */ 4139 switch (af) { 4140#ifdef INET6 4141 case AF_INET6: 4142 if (!IN6_ARE_ADDR_EQUAL(&rin6->sin6_addr, 4143 &in6addr_any)) 4144 rin6->sin6_port = htons(port.sval); 4145 else 4146 cantparse = 1; 4147 break; 4148#endif 4149#ifdef INET 4150 case AF_INET: 4151 if (ip.ival != INADDR_ANY) { 4152 rin->sin_addr.s_addr = htonl(ip.ival); 4153 rin->sin_port = htons(port.sval); 4154 } else { 4155 cantparse = 1; 4156 } 4157 break; 4158#endif 4159 } 4160 } 4161 } else { 4162 cantparse = 1; 4163 if (i > 0) { 4164 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 4165 if (error) 4166 goto nfsmout; 4167 } 4168 } 4169 if (cantparse) { 4170 switch (nd->nd_nam->sa_family) { 4171#ifdef INET 4172 case AF_INET: 4173 sin = (struct sockaddr_in *)nd->nd_nam; 4174 rin = (struct sockaddr_in *)clp->lc_req.nr_nam; 4175 rin->sin_family = AF_INET; 4176 rin->sin_len = sizeof(struct sockaddr_in); 4177 rin->sin_addr.s_addr = sin->sin_addr.s_addr; 4178 rin->sin_port = 0x0; 4179 break; 4180#endif 4181#ifdef INET6 4182 case AF_INET6: 4183 sin6 = (struct sockaddr_in6 *)nd->nd_nam; 4184 rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam; 4185 rin6->sin6_family = AF_INET6; 4186 rin6->sin6_len = sizeof(struct sockaddr_in6); 4187 rin6->sin6_addr = sin6->sin6_addr; 4188 rin6->sin6_port = 0x0; 4189 break; 4190#endif 4191 } 4192 clp->lc_program = 0; 4193 } 4194nfsmout: 4195 free(addr, M_TEMP); 4196 NFSEXITCODE2(error, nd); 4197 return (error); 4198} 4199 4200/* 4201 * Turn a string of up to three decimal digits into a number. Return -1 upon 4202 * error. 4203 */ 4204static int 4205nfsrv_getipnumber(u_char *cp) 4206{ 4207 int i = 0, j = 0; 4208 4209 while (*cp) { 4210 if (j > 2 || *cp < '0' || *cp > '9') 4211 return (-1); 4212 i *= 10; 4213 i += (*cp - '0'); 4214 cp++; 4215 j++; 4216 } 4217 if (i < 256) 4218 return (i); 4219 return (-1); 4220} 4221 4222/* 4223 * This function checks for restart conditions. 4224 */ 4225static int 4226nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 4227 nfsv4stateid_t *stateidp, int specialid) 4228{ 4229 int ret = 0; 4230 4231 /* 4232 * First check for a server restart. Open, LockT, ReleaseLockOwner 4233 * and DelegPurge have a clientid, the rest a stateid. 4234 */ 4235 if (flags & 4236 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 4237 if (clientid.lval[0] != nfsrvboottime) { 4238 ret = NFSERR_STALECLIENTID; 4239 goto out; 4240 } 4241 } else if (stateidp->other[0] != nfsrvboottime && 4242 specialid == 0) { 4243 ret = NFSERR_STALESTATEID; 4244 goto out; 4245 } 4246 4247 /* 4248 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 4249 * not use a lock/open owner seqid#, so the check can be done now. 4250 * (The others will be checked, as required, later.) 4251 */ 4252 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 4253 goto out; 4254 4255 NFSLOCKSTATE(); 4256 ret = nfsrv_checkgrace(NULL, NULL, flags); 4257 NFSUNLOCKSTATE(); 4258 4259out: 4260 NFSEXITCODE(ret); 4261 return (ret); 4262} 4263 4264/* 4265 * Check for grace. 4266 */ 4267static int 4268nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 4269 u_int32_t flags) 4270{ 4271 int error = 0, notreclaimed; 4272 struct nfsrv_stable *sp; 4273 4274 if ((nfsrv_stablefirst.nsf_flags & (NFSNSF_UPDATEDONE | 4275 NFSNSF_GRACEOVER)) == 0) { 4276 /* 4277 * First, check to see if all of the clients have done a 4278 * ReclaimComplete. If so, grace can end now. 4279 */ 4280 notreclaimed = 0; 4281 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4282 if ((sp->nst_flag & NFSNST_RECLAIMED) == 0) { 4283 notreclaimed = 1; 4284 break; 4285 } 4286 } 4287 if (notreclaimed == 0) 4288 nfsrv_stablefirst.nsf_flags |= (NFSNSF_GRACEOVER | 4289 NFSNSF_NEEDLOCK); 4290 } 4291 4292 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) { 4293 if (flags & NFSLCK_RECLAIM) { 4294 error = NFSERR_NOGRACE; 4295 goto out; 4296 } 4297 } else { 4298 if (!(flags & NFSLCK_RECLAIM)) { 4299 error = NFSERR_GRACE; 4300 goto out; 4301 } 4302 if (nd != NULL && clp != NULL && 4303 (nd->nd_flag & ND_NFSV41) != 0 && 4304 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 4305 error = NFSERR_NOGRACE; 4306 goto out; 4307 } 4308 4309 /* 4310 * If grace is almost over and we are still getting Reclaims, 4311 * extend grace a bit. 4312 */ 4313 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 4314 nfsrv_stablefirst.nsf_eograce) 4315 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 4316 NFSRV_LEASEDELTA; 4317 } 4318 4319out: 4320 NFSEXITCODE(error); 4321 return (error); 4322} 4323 4324/* 4325 * Do a server callback. 4326 */ 4327static int 4328nfsrv_docallback(struct nfsclient *clp, int procnum, 4329 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 4330 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 4331{ 4332 mbuf_t m; 4333 u_int32_t *tl; 4334 struct nfsrv_descript nfsd, *nd = &nfsd; 4335 struct ucred *cred; 4336 int error = 0; 4337 u_int32_t callback; 4338 struct nfsdsession *sep = NULL; 4339 4340 cred = newnfs_getcred(); 4341 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 4342 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 4343 NFSUNLOCKSTATE(); 4344 panic("docallb"); 4345 } 4346 clp->lc_cbref++; 4347 4348 /* 4349 * Fill the callback program# and version into the request 4350 * structure for newnfs_connect() to use. 4351 */ 4352 clp->lc_req.nr_prog = clp->lc_program; 4353#ifdef notnow 4354 if ((clp->lc_flags & LCL_NFSV41) != 0) 4355 clp->lc_req.nr_vers = NFSV41_CBVERS; 4356 else 4357#endif 4358 clp->lc_req.nr_vers = NFSV4_CBVERS; 4359 4360 /* 4361 * First, fill in some of the fields of nd and cr. 4362 */ 4363 nd->nd_flag = ND_NFSV4; 4364 if (clp->lc_flags & LCL_GSS) 4365 nd->nd_flag |= ND_KERBV; 4366 if ((clp->lc_flags & LCL_NFSV41) != 0) 4367 nd->nd_flag |= ND_NFSV41; 4368 nd->nd_repstat = 0; 4369 cred->cr_uid = clp->lc_uid; 4370 cred->cr_gid = clp->lc_gid; 4371 callback = clp->lc_callback; 4372 NFSUNLOCKSTATE(); 4373 cred->cr_ngroups = 1; 4374 4375 /* 4376 * Get the first mbuf for the request. 4377 */ 4378 MGET(m, M_WAITOK, MT_DATA); 4379 mbuf_setlen(m, 0); 4380 nd->nd_mreq = nd->nd_mb = m; 4381 nd->nd_bpos = NFSMTOD(m, caddr_t); 4382 4383 /* 4384 * and build the callback request. 4385 */ 4386 if (procnum == NFSV4OP_CBGETATTR) { 4387 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4388 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4389 "CB Getattr", &sep); 4390 if (error != 0) { 4391 mbuf_freem(nd->nd_mreq); 4392 goto errout; 4393 } 4394 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4395 (void)nfsrv_putattrbit(nd, attrbitp); 4396 } else if (procnum == NFSV4OP_CBRECALL) { 4397 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4398 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4399 "CB Recall", &sep); 4400 if (error != 0) { 4401 mbuf_freem(nd->nd_mreq); 4402 goto errout; 4403 } 4404 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4405 *tl++ = txdr_unsigned(stateidp->seqid); 4406 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4407 NFSX_STATEIDOTHER); 4408 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4409 if (trunc) 4410 *tl = newnfs_true; 4411 else 4412 *tl = newnfs_false; 4413 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4414 } else if (procnum == NFSV4PROC_CBNULL) { 4415 nd->nd_procnum = NFSV4PROC_CBNULL; 4416 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4417 error = nfsv4_getcbsession(clp, &sep); 4418 if (error != 0) { 4419 mbuf_freem(nd->nd_mreq); 4420 goto errout; 4421 } 4422 } 4423 } else { 4424 error = NFSERR_SERVERFAULT; 4425 mbuf_freem(nd->nd_mreq); 4426 goto errout; 4427 } 4428 4429 /* 4430 * Call newnfs_connect(), as required, and then newnfs_request(). 4431 */ 4432 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4433 if (clp->lc_req.nr_client == NULL) { 4434 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4435 error = ECONNREFUSED; 4436 nfsrv_freesession(sep, NULL); 4437 } else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4438 error = newnfs_connect(NULL, &clp->lc_req, cred, 4439 NULL, 1); 4440 else 4441 error = newnfs_connect(NULL, &clp->lc_req, cred, 4442 NULL, 3); 4443 } 4444 newnfs_sndunlock(&clp->lc_req.nr_lock); 4445 if (!error) { 4446 if ((nd->nd_flag & ND_NFSV41) != 0) { 4447 KASSERT(sep != NULL, ("sep NULL")); 4448 if (sep->sess_cbsess.nfsess_xprt != NULL) 4449 error = newnfs_request(nd, NULL, clp, 4450 &clp->lc_req, NULL, NULL, cred, 4451 clp->lc_program, clp->lc_req.nr_vers, NULL, 4452 1, NULL, &sep->sess_cbsess); 4453 else { 4454 /* 4455 * This should probably never occur, but if a 4456 * client somehow does an RPC without a 4457 * SequenceID Op that causes a callback just 4458 * after the nfsd threads have been terminated 4459 * and restared we could conceivably get here 4460 * without a backchannel xprt. 4461 */ 4462 printf("nfsrv_docallback: no xprt\n"); 4463 error = ECONNREFUSED; 4464 } 4465 nfsrv_freesession(sep, NULL); 4466 } else 4467 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4468 NULL, NULL, cred, clp->lc_program, 4469 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4470 } 4471errout: 4472 NFSFREECRED(cred); 4473 4474 /* 4475 * If error is set here, the Callback path isn't working 4476 * properly, so twiddle the appropriate LCL_ flags. 4477 * (nd_repstat != 0 indicates the Callback path is working, 4478 * but the callback failed on the client.) 4479 */ 4480 if (error) { 4481 /* 4482 * Mark the callback pathway down, which disabled issuing 4483 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4484 */ 4485 NFSLOCKSTATE(); 4486 clp->lc_flags |= LCL_CBDOWN; 4487 NFSUNLOCKSTATE(); 4488 } else { 4489 /* 4490 * Callback worked. If the callback path was down, disable 4491 * callbacks, so no more delegations will be issued. (This 4492 * is done on the assumption that the callback pathway is 4493 * flakey.) 4494 */ 4495 NFSLOCKSTATE(); 4496 if (clp->lc_flags & LCL_CBDOWN) 4497 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4498 NFSUNLOCKSTATE(); 4499 if (nd->nd_repstat) 4500 error = nd->nd_repstat; 4501 else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4502 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4503 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4504 p, NULL); 4505 mbuf_freem(nd->nd_mrep); 4506 } 4507 NFSLOCKSTATE(); 4508 clp->lc_cbref--; 4509 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4510 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4511 wakeup(clp); 4512 } 4513 NFSUNLOCKSTATE(); 4514 4515 NFSEXITCODE(error); 4516 return (error); 4517} 4518 4519/* 4520 * Set up the compound RPC for the callback. 4521 */ 4522static int 4523nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4524 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp) 4525{ 4526 uint32_t *tl; 4527 int error, len; 4528 4529 len = strlen(optag); 4530 (void)nfsm_strtom(nd, optag, len); 4531 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4532 if ((nd->nd_flag & ND_NFSV41) != 0) { 4533 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4534 *tl++ = txdr_unsigned(callback); 4535 *tl++ = txdr_unsigned(2); 4536 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4537 error = nfsv4_setcbsequence(nd, clp, 1, sepp); 4538 if (error != 0) 4539 return (error); 4540 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4541 *tl = txdr_unsigned(op); 4542 } else { 4543 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4544 *tl++ = txdr_unsigned(callback); 4545 *tl++ = txdr_unsigned(1); 4546 *tl = txdr_unsigned(op); 4547 } 4548 return (0); 4549} 4550 4551/* 4552 * Return the next index# for a clientid. Mostly just increment and return 4553 * the next one, but... if the 32bit unsigned does actually wrap around, 4554 * it should be rebooted. 4555 * At an average rate of one new client per second, it will wrap around in 4556 * approximately 136 years. (I think the server will have been shut 4557 * down or rebooted before then.) 4558 */ 4559static u_int32_t 4560nfsrv_nextclientindex(void) 4561{ 4562 static u_int32_t client_index = 0; 4563 4564 client_index++; 4565 if (client_index != 0) 4566 return (client_index); 4567 4568 printf("%s: out of clientids\n", __func__); 4569 return (client_index); 4570} 4571 4572/* 4573 * Return the next index# for a stateid. Mostly just increment and return 4574 * the next one, but... if the 32bit unsigned does actually wrap around 4575 * (will a BSD server stay up that long?), find 4576 * new start and end values. 4577 */ 4578static u_int32_t 4579nfsrv_nextstateindex(struct nfsclient *clp) 4580{ 4581 struct nfsstate *stp; 4582 int i; 4583 u_int32_t canuse, min_index, max_index; 4584 4585 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4586 clp->lc_stateindex++; 4587 if (clp->lc_stateindex != clp->lc_statemaxindex) 4588 return (clp->lc_stateindex); 4589 } 4590 4591 /* 4592 * Yuck, we've hit the end. 4593 * Look for a new min and max. 4594 */ 4595 min_index = 0; 4596 max_index = 0xffffffff; 4597 for (i = 0; i < nfsrv_statehashsize; i++) { 4598 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4599 if (stp->ls_stateid.other[2] > 0x80000000) { 4600 if (stp->ls_stateid.other[2] < max_index) 4601 max_index = stp->ls_stateid.other[2]; 4602 } else { 4603 if (stp->ls_stateid.other[2] > min_index) 4604 min_index = stp->ls_stateid.other[2]; 4605 } 4606 } 4607 } 4608 4609 /* 4610 * Yikes, highly unlikely, but I'll handle it anyhow. 4611 */ 4612 if (min_index == 0x80000000 && max_index == 0x80000001) { 4613 canuse = 0; 4614 /* 4615 * Loop around until we find an unused entry. Return that 4616 * and set LCL_INDEXNOTOK, so the search will continue next time. 4617 * (This is one of those rare cases where a goto is the 4618 * cleanest way to code the loop.) 4619 */ 4620tryagain: 4621 for (i = 0; i < nfsrv_statehashsize; i++) { 4622 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4623 if (stp->ls_stateid.other[2] == canuse) { 4624 canuse++; 4625 goto tryagain; 4626 } 4627 } 4628 } 4629 clp->lc_flags |= LCL_INDEXNOTOK; 4630 return (canuse); 4631 } 4632 4633 /* 4634 * Ok to start again from min + 1. 4635 */ 4636 clp->lc_stateindex = min_index + 1; 4637 clp->lc_statemaxindex = max_index; 4638 clp->lc_flags &= ~LCL_INDEXNOTOK; 4639 return (clp->lc_stateindex); 4640} 4641 4642/* 4643 * The following functions handle the stable storage file that deals with 4644 * the edge conditions described in RFC3530 Sec. 8.6.3. 4645 * The file is as follows: 4646 * - a single record at the beginning that has the lease time of the 4647 * previous server instance (before the last reboot) and the nfsrvboottime 4648 * values for the previous server boots. 4649 * These previous boot times are used to ensure that the current 4650 * nfsrvboottime does not, somehow, get set to a previous one. 4651 * (This is important so that Stale ClientIDs and StateIDs can 4652 * be recognized.) 4653 * The number of previous nfsvrboottime values preceeds the list. 4654 * - followed by some number of appended records with: 4655 * - client id string 4656 * - flag that indicates it is a record revoking state via lease 4657 * expiration or similar 4658 * OR has successfully acquired state. 4659 * These structures vary in length, with the client string at the end, up 4660 * to NFSV4_OPAQUELIMIT in size. 4661 * 4662 * At the end of the grace period, the file is truncated, the first 4663 * record is rewritten with updated information and any acquired state 4664 * records for successful reclaims of state are written. 4665 * 4666 * Subsequent records are appended when the first state is issued to 4667 * a client and when state is revoked for a client. 4668 * 4669 * When reading the file in, state issued records that come later in 4670 * the file override older ones, since the append log is in cronological order. 4671 * If, for some reason, the file can't be read, the grace period is 4672 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4673 */ 4674 4675/* 4676 * Read in the stable storage file. Called by nfssvc() before the nfsd 4677 * processes start servicing requests. 4678 */ 4679APPLESTATIC void 4680nfsrv_setupstable(NFSPROC_T *p) 4681{ 4682 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4683 struct nfsrv_stable *sp, *nsp; 4684 struct nfst_rec *tsp; 4685 int error, i, tryagain; 4686 off_t off = 0; 4687 ssize_t aresid, len; 4688 4689 /* 4690 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4691 * a reboot, so state has not been lost. 4692 */ 4693 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4694 return; 4695 /* 4696 * Set Grace over just until the file reads successfully. 4697 */ 4698 nfsrvboottime = time_second; 4699 LIST_INIT(&sf->nsf_head); 4700 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4701 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4702 if (sf->nsf_fp == NULL) 4703 return; 4704 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4705 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4706 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4707 if (error || aresid || sf->nsf_numboots == 0 || 4708 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4709 return; 4710 4711 /* 4712 * Now, read in the boottimes. 4713 */ 4714 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4715 sizeof (time_t), M_TEMP, M_WAITOK); 4716 off = sizeof (struct nfsf_rec); 4717 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4718 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4719 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4720 if (error || aresid) { 4721 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4722 sf->nsf_bootvals = NULL; 4723 return; 4724 } 4725 4726 /* 4727 * Make sure this nfsrvboottime is different from all recorded 4728 * previous ones. 4729 */ 4730 do { 4731 tryagain = 0; 4732 for (i = 0; i < sf->nsf_numboots; i++) { 4733 if (nfsrvboottime == sf->nsf_bootvals[i]) { 4734 nfsrvboottime++; 4735 tryagain = 1; 4736 break; 4737 } 4738 } 4739 } while (tryagain); 4740 4741 sf->nsf_flags |= NFSNSF_OK; 4742 off += (sf->nsf_numboots * sizeof (time_t)); 4743 4744 /* 4745 * Read through the file, building a list of records for grace 4746 * checking. 4747 * Each record is between sizeof (struct nfst_rec) and 4748 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4749 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4750 */ 4751 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4752 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4753 do { 4754 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4755 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4756 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4757 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4758 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4759 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4760 /* 4761 * Yuck, the file has been corrupted, so just return 4762 * after clearing out any restart state, so the grace period 4763 * is over. 4764 */ 4765 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4766 LIST_REMOVE(sp, nst_list); 4767 free((caddr_t)sp, M_TEMP); 4768 } 4769 free((caddr_t)tsp, M_TEMP); 4770 sf->nsf_flags &= ~NFSNSF_OK; 4771 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4772 sf->nsf_bootvals = NULL; 4773 return; 4774 } 4775 if (len > 0) { 4776 off += sizeof (struct nfst_rec) + tsp->len - 1; 4777 /* 4778 * Search the list for a matching client. 4779 */ 4780 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4781 if (tsp->len == sp->nst_len && 4782 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4783 break; 4784 } 4785 if (sp == LIST_END(&sf->nsf_head)) { 4786 sp = (struct nfsrv_stable *)malloc(tsp->len + 4787 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4788 M_WAITOK); 4789 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4790 sizeof (struct nfst_rec) + tsp->len - 1); 4791 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4792 } else { 4793 if (tsp->flag == NFSNST_REVOKE) 4794 sp->nst_flag |= NFSNST_REVOKE; 4795 else 4796 /* 4797 * A subsequent timestamp indicates the client 4798 * did a setclientid/confirm and any previous 4799 * revoke is no longer relevant. 4800 */ 4801 sp->nst_flag &= ~NFSNST_REVOKE; 4802 } 4803 } 4804 } while (len > 0); 4805 free((caddr_t)tsp, M_TEMP); 4806 sf->nsf_flags = NFSNSF_OK; 4807 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4808 NFSRV_LEASEDELTA; 4809} 4810 4811/* 4812 * Update the stable storage file, now that the grace period is over. 4813 */ 4814APPLESTATIC void 4815nfsrv_updatestable(NFSPROC_T *p) 4816{ 4817 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4818 struct nfsrv_stable *sp, *nsp; 4819 int i; 4820 struct nfsvattr nva; 4821 vnode_t vp; 4822#if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4823 mount_t mp = NULL; 4824#endif 4825 int error; 4826 4827 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4828 return; 4829 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4830 /* 4831 * Ok, we need to rewrite the stable storage file. 4832 * - truncate to 0 length 4833 * - write the new first structure 4834 * - loop through the data structures, writing out any that 4835 * have timestamps older than the old boot 4836 */ 4837 if (sf->nsf_bootvals) { 4838 sf->nsf_numboots++; 4839 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4840 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4841 } else { 4842 sf->nsf_numboots = 1; 4843 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4844 M_TEMP, M_WAITOK); 4845 } 4846 sf->nsf_bootvals[0] = nfsrvboottime; 4847 sf->nsf_lease = nfsrv_lease; 4848 NFSVNO_ATTRINIT(&nva); 4849 NFSVNO_SETATTRVAL(&nva, size, 0); 4850 vp = NFSFPVNODE(sf->nsf_fp); 4851 vn_start_write(vp, &mp, V_WAIT); 4852 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4853 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4854 NULL); 4855 NFSVOPUNLOCK(vp, 0); 4856 } else 4857 error = EPERM; 4858 vn_finished_write(mp); 4859 if (!error) 4860 error = NFSD_RDWR(UIO_WRITE, vp, 4861 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4862 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4863 if (!error) 4864 error = NFSD_RDWR(UIO_WRITE, vp, 4865 (caddr_t)sf->nsf_bootvals, 4866 sf->nsf_numboots * sizeof (time_t), 4867 (off_t)(sizeof (struct nfsf_rec)), 4868 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4869 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4870 sf->nsf_bootvals = NULL; 4871 if (error) { 4872 sf->nsf_flags &= ~NFSNSF_OK; 4873 printf("EEK! Can't write NfsV4 stable storage file\n"); 4874 return; 4875 } 4876 sf->nsf_flags |= NFSNSF_OK; 4877 4878 /* 4879 * Loop through the list and write out timestamp records for 4880 * any clients that successfully reclaimed state. 4881 */ 4882 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4883 if (sp->nst_flag & NFSNST_GOTSTATE) { 4884 nfsrv_writestable(sp->nst_client, sp->nst_len, 4885 NFSNST_NEWSTATE, p); 4886 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4887 } 4888 LIST_REMOVE(sp, nst_list); 4889 free((caddr_t)sp, M_TEMP); 4890 } 4891 nfsrv_backupstable(); 4892} 4893 4894/* 4895 * Append a record to the stable storage file. 4896 */ 4897APPLESTATIC void 4898nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4899{ 4900 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4901 struct nfst_rec *sp; 4902 int error; 4903 4904 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4905 return; 4906 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4907 len - 1, M_TEMP, M_WAITOK); 4908 sp->len = len; 4909 NFSBCOPY(client, sp->client, len); 4910 sp->flag = flag; 4911 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 4912 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 4913 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 4914 free((caddr_t)sp, M_TEMP); 4915 if (error) { 4916 sf->nsf_flags &= ~NFSNSF_OK; 4917 printf("EEK! Can't write NfsV4 stable storage file\n"); 4918 } 4919} 4920 4921/* 4922 * This function is called during the grace period to mark a client 4923 * that successfully reclaimed state. 4924 */ 4925static void 4926nfsrv_markstable(struct nfsclient *clp) 4927{ 4928 struct nfsrv_stable *sp; 4929 4930 /* 4931 * First find the client structure. 4932 */ 4933 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4934 if (sp->nst_len == clp->lc_idlen && 4935 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4936 break; 4937 } 4938 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4939 return; 4940 4941 /* 4942 * Now, just mark it and set the nfsclient back pointer. 4943 */ 4944 sp->nst_flag |= NFSNST_GOTSTATE; 4945 sp->nst_clp = clp; 4946} 4947 4948/* 4949 * This function is called when a NFSv4.1 client does a ReclaimComplete. 4950 * Very similar to nfsrv_markstable(), except for the flag being set. 4951 */ 4952static void 4953nfsrv_markreclaim(struct nfsclient *clp) 4954{ 4955 struct nfsrv_stable *sp; 4956 4957 /* 4958 * First find the client structure. 4959 */ 4960 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4961 if (sp->nst_len == clp->lc_idlen && 4962 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4963 break; 4964 } 4965 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4966 return; 4967 4968 /* 4969 * Now, just set the flag. 4970 */ 4971 sp->nst_flag |= NFSNST_RECLAIMED; 4972} 4973 4974/* 4975 * This function is called for a reclaim, to see if it gets grace. 4976 * It returns 0 if a reclaim is allowed, 1 otherwise. 4977 */ 4978static int 4979nfsrv_checkstable(struct nfsclient *clp) 4980{ 4981 struct nfsrv_stable *sp; 4982 4983 /* 4984 * First, find the entry for the client. 4985 */ 4986 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4987 if (sp->nst_len == clp->lc_idlen && 4988 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4989 break; 4990 } 4991 4992 /* 4993 * If not in the list, state was revoked or no state was issued 4994 * since the previous reboot, a reclaim is denied. 4995 */ 4996 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 4997 (sp->nst_flag & NFSNST_REVOKE) || 4998 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 4999 return (1); 5000 return (0); 5001} 5002 5003/* 5004 * Test for and try to clear out a conflicting client. This is called by 5005 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 5006 * a found. 5007 * The trick here is that it can't revoke a conflicting client with an 5008 * expired lease unless it holds the v4root lock, so... 5009 * If no v4root lock, get the lock and return 1 to indicate "try again". 5010 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 5011 * the revocation worked and the conflicting client is "bye, bye", so it 5012 * can be tried again. 5013 * Return 2 to indicate that the vnode is VI_DOOMED after NFSVOPLOCK(). 5014 * Unlocks State before a non-zero value is returned. 5015 */ 5016static int 5017nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 5018 NFSPROC_T *p) 5019{ 5020 int gotlock, lktype = 0; 5021 5022 /* 5023 * If lease hasn't expired, we can't fix it. 5024 */ 5025 if (clp->lc_expiry >= NFSD_MONOSEC || 5026 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 5027 return (0); 5028 if (*haslockp == 0) { 5029 NFSUNLOCKSTATE(); 5030 if (vp != NULL) { 5031 lktype = NFSVOPISLOCKED(vp); 5032 NFSVOPUNLOCK(vp, 0); 5033 } 5034 NFSLOCKV4ROOTMUTEX(); 5035 nfsv4_relref(&nfsv4rootfs_lock); 5036 do { 5037 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5038 NFSV4ROOTLOCKMUTEXPTR, NULL); 5039 } while (!gotlock); 5040 NFSUNLOCKV4ROOTMUTEX(); 5041 *haslockp = 1; 5042 if (vp != NULL) { 5043 NFSVOPLOCK(vp, lktype | LK_RETRY); 5044 if ((vp->v_iflag & VI_DOOMED) != 0) 5045 return (2); 5046 } 5047 return (1); 5048 } 5049 NFSUNLOCKSTATE(); 5050 5051 /* 5052 * Ok, we can expire the conflicting client. 5053 */ 5054 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5055 nfsrv_backupstable(); 5056 nfsrv_cleanclient(clp, p); 5057 nfsrv_freedeleglist(&clp->lc_deleg); 5058 nfsrv_freedeleglist(&clp->lc_olddeleg); 5059 LIST_REMOVE(clp, lc_hash); 5060 nfsrv_zapclient(clp, p); 5061 return (1); 5062} 5063 5064/* 5065 * Resolve a delegation conflict. 5066 * Returns 0 to indicate the conflict was resolved without sleeping. 5067 * Return -1 to indicate that the caller should check for conflicts again. 5068 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 5069 * 5070 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 5071 * for a return of 0, since there was no sleep and it could be required 5072 * later. It is released for a return of NFSERR_DELAY, since the caller 5073 * will return that error. It is released when a sleep was done waiting 5074 * for the delegation to be returned or expire (so that other nfsds can 5075 * handle ops). Then, it must be acquired for the write to stable storage. 5076 * (This function is somewhat similar to nfsrv_clientconflict(), but 5077 * the semantics differ in a couple of subtle ways. The return of 0 5078 * indicates the conflict was resolved without sleeping here, not 5079 * that the conflict can't be resolved and the handling of nfsv4root_lock 5080 * differs, as noted above.) 5081 * Unlocks State before returning a non-zero value. 5082 */ 5083static int 5084nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 5085 vnode_t vp) 5086{ 5087 struct nfsclient *clp = stp->ls_clp; 5088 int gotlock, error, lktype = 0, retrycnt, zapped_clp; 5089 nfsv4stateid_t tstateid; 5090 fhandle_t tfh; 5091 5092 /* 5093 * If the conflict is with an old delegation... 5094 */ 5095 if (stp->ls_flags & NFSLCK_OLDDELEG) { 5096 /* 5097 * You can delete it, if it has expired. 5098 */ 5099 if (clp->lc_delegtime < NFSD_MONOSEC) { 5100 nfsrv_freedeleg(stp); 5101 NFSUNLOCKSTATE(); 5102 error = -1; 5103 goto out; 5104 } 5105 NFSUNLOCKSTATE(); 5106 /* 5107 * During this delay, the old delegation could expire or it 5108 * could be recovered by the client via an Open with 5109 * CLAIM_DELEGATE_PREV. 5110 * Release the nfsv4root_lock, if held. 5111 */ 5112 if (*haslockp) { 5113 *haslockp = 0; 5114 NFSLOCKV4ROOTMUTEX(); 5115 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5116 NFSUNLOCKV4ROOTMUTEX(); 5117 } 5118 error = NFSERR_DELAY; 5119 goto out; 5120 } 5121 5122 /* 5123 * It's a current delegation, so: 5124 * - check to see if the delegation has expired 5125 * - if so, get the v4root lock and then expire it 5126 */ 5127 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 5128 /* 5129 * - do a recall callback, since not yet done 5130 * For now, never allow truncate to be set. To use 5131 * truncate safely, it must be guaranteed that the 5132 * Remove, Rename or Setattr with size of 0 will 5133 * succeed and that would require major changes to 5134 * the VFS/Vnode OPs. 5135 * Set the expiry time large enough so that it won't expire 5136 * until after the callback, then set it correctly, once 5137 * the callback is done. (The delegation will now time 5138 * out whether or not the Recall worked ok. The timeout 5139 * will be extended when ops are done on the delegation 5140 * stateid, up to the timelimit.) 5141 */ 5142 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 5143 NFSRV_LEASEDELTA; 5144 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 5145 NFSRV_LEASEDELTA; 5146 stp->ls_flags |= NFSLCK_DELEGRECALL; 5147 5148 /* 5149 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 5150 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 5151 * in order to try and avoid a race that could happen 5152 * when a CBRecall request passed the Open reply with 5153 * the delegation in it when transitting the network. 5154 * Since nfsrv_docallback will sleep, don't use stp after 5155 * the call. 5156 */ 5157 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 5158 sizeof (tstateid)); 5159 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 5160 sizeof (tfh)); 5161 NFSUNLOCKSTATE(); 5162 if (*haslockp) { 5163 *haslockp = 0; 5164 NFSLOCKV4ROOTMUTEX(); 5165 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5166 NFSUNLOCKV4ROOTMUTEX(); 5167 } 5168 retrycnt = 0; 5169 do { 5170 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 5171 &tstateid, 0, &tfh, NULL, NULL, p); 5172 retrycnt++; 5173 } while ((error == NFSERR_BADSTATEID || 5174 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 5175 error = NFSERR_DELAY; 5176 goto out; 5177 } 5178 5179 if (clp->lc_expiry >= NFSD_MONOSEC && 5180 stp->ls_delegtime >= NFSD_MONOSEC) { 5181 NFSUNLOCKSTATE(); 5182 /* 5183 * A recall has been done, but it has not yet expired. 5184 * So, RETURN_DELAY. 5185 */ 5186 if (*haslockp) { 5187 *haslockp = 0; 5188 NFSLOCKV4ROOTMUTEX(); 5189 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5190 NFSUNLOCKV4ROOTMUTEX(); 5191 } 5192 error = NFSERR_DELAY; 5193 goto out; 5194 } 5195 5196 /* 5197 * If we don't yet have the lock, just get it and then return, 5198 * since we need that before deleting expired state, such as 5199 * this delegation. 5200 * When getting the lock, unlock the vnode, so other nfsds that 5201 * are in progress, won't get stuck waiting for the vnode lock. 5202 */ 5203 if (*haslockp == 0) { 5204 NFSUNLOCKSTATE(); 5205 if (vp != NULL) { 5206 lktype = NFSVOPISLOCKED(vp); 5207 NFSVOPUNLOCK(vp, 0); 5208 } 5209 NFSLOCKV4ROOTMUTEX(); 5210 nfsv4_relref(&nfsv4rootfs_lock); 5211 do { 5212 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 5213 NFSV4ROOTLOCKMUTEXPTR, NULL); 5214 } while (!gotlock); 5215 NFSUNLOCKV4ROOTMUTEX(); 5216 *haslockp = 1; 5217 if (vp != NULL) { 5218 NFSVOPLOCK(vp, lktype | LK_RETRY); 5219 if ((vp->v_iflag & VI_DOOMED) != 0) { 5220 *haslockp = 0; 5221 NFSLOCKV4ROOTMUTEX(); 5222 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5223 NFSUNLOCKV4ROOTMUTEX(); 5224 error = NFSERR_PERM; 5225 goto out; 5226 } 5227 } 5228 error = -1; 5229 goto out; 5230 } 5231 5232 NFSUNLOCKSTATE(); 5233 /* 5234 * Ok, we can delete the expired delegation. 5235 * First, write the Revoke record to stable storage and then 5236 * clear out the conflict. 5237 * Since all other nfsd threads are now blocked, we can safely 5238 * sleep without the state changing. 5239 */ 5240 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 5241 nfsrv_backupstable(); 5242 if (clp->lc_expiry < NFSD_MONOSEC) { 5243 nfsrv_cleanclient(clp, p); 5244 nfsrv_freedeleglist(&clp->lc_deleg); 5245 nfsrv_freedeleglist(&clp->lc_olddeleg); 5246 LIST_REMOVE(clp, lc_hash); 5247 zapped_clp = 1; 5248 } else { 5249 nfsrv_freedeleg(stp); 5250 zapped_clp = 0; 5251 } 5252 if (zapped_clp) 5253 nfsrv_zapclient(clp, p); 5254 error = -1; 5255 5256out: 5257 NFSEXITCODE(error); 5258 return (error); 5259} 5260 5261/* 5262 * Check for a remove allowed, if remove is set to 1 and get rid of 5263 * delegations. 5264 */ 5265APPLESTATIC int 5266nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p) 5267{ 5268 struct nfsstate *stp; 5269 struct nfslockfile *lfp; 5270 int error, haslock = 0; 5271 fhandle_t nfh; 5272 5273 /* 5274 * First, get the lock file structure. 5275 * (A return of -1 means no associated state, so remove ok.) 5276 */ 5277 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5278tryagain: 5279 NFSLOCKSTATE(); 5280 if (!error) 5281 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5282 if (error) { 5283 NFSUNLOCKSTATE(); 5284 if (haslock) { 5285 NFSLOCKV4ROOTMUTEX(); 5286 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5287 NFSUNLOCKV4ROOTMUTEX(); 5288 } 5289 if (error == -1) 5290 error = 0; 5291 goto out; 5292 } 5293 5294 /* 5295 * Now, we must Recall any delegations. 5296 */ 5297 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p); 5298 if (error) { 5299 /* 5300 * nfsrv_cleandeleg() unlocks state for non-zero 5301 * return. 5302 */ 5303 if (error == -1) 5304 goto tryagain; 5305 if (haslock) { 5306 NFSLOCKV4ROOTMUTEX(); 5307 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5308 NFSUNLOCKV4ROOTMUTEX(); 5309 } 5310 goto out; 5311 } 5312 5313 /* 5314 * Now, look for a conflicting open share. 5315 */ 5316 if (remove) { 5317 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 5318 if (stp->ls_flags & NFSLCK_WRITEDENY) { 5319 error = NFSERR_FILEOPEN; 5320 break; 5321 } 5322 } 5323 } 5324 5325 NFSUNLOCKSTATE(); 5326 if (haslock) { 5327 NFSLOCKV4ROOTMUTEX(); 5328 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5329 NFSUNLOCKV4ROOTMUTEX(); 5330 } 5331 5332out: 5333 NFSEXITCODE(error); 5334 return (error); 5335} 5336 5337/* 5338 * Clear out all delegations for the file referred to by lfp. 5339 * May return NFSERR_DELAY, if there will be a delay waiting for 5340 * delegations to expire. 5341 * Returns -1 to indicate it slept while recalling a delegation. 5342 * This function has the side effect of deleting the nfslockfile structure, 5343 * if it no longer has associated state and didn't have to sleep. 5344 * Unlocks State before a non-zero value is returned. 5345 */ 5346static int 5347nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 5348 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 5349{ 5350 struct nfsstate *stp, *nstp; 5351 int ret = 0; 5352 5353 stp = LIST_FIRST(&lfp->lf_deleg); 5354 while (stp != LIST_END(&lfp->lf_deleg)) { 5355 nstp = LIST_NEXT(stp, ls_file); 5356 if (stp->ls_clp != clp) { 5357 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 5358 if (ret) { 5359 /* 5360 * nfsrv_delegconflict() unlocks state 5361 * when it returns non-zero. 5362 */ 5363 goto out; 5364 } 5365 } 5366 stp = nstp; 5367 } 5368out: 5369 NFSEXITCODE(ret); 5370 return (ret); 5371} 5372 5373/* 5374 * There are certain operations that, when being done outside of NFSv4, 5375 * require that any NFSv4 delegation for the file be recalled. 5376 * This function is to be called for those cases: 5377 * VOP_RENAME() - When a delegation is being recalled for any reason, 5378 * the client may have to do Opens against the server, using the file's 5379 * final component name. If the file has been renamed on the server, 5380 * that component name will be incorrect and the Open will fail. 5381 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 5382 * been removed on the server, if there is a delegation issued to 5383 * that client for the file. I say "theoretically" since clients 5384 * normally do an Access Op before the Open and that Access Op will 5385 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 5386 * they will detect the file's removal in the same manner. (There is 5387 * one case where RFC3530 allows a client to do an Open without first 5388 * doing an Access Op, which is passage of a check against the ACE 5389 * returned with a Write delegation, but current practice is to ignore 5390 * the ACE and always do an Access Op.) 5391 * Since the functions can only be called with an unlocked vnode, this 5392 * can't be done at this time. 5393 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 5394 * locks locally in the client, which are not visible to the server. To 5395 * deal with this, issuing of delegations for a vnode must be disabled 5396 * and all delegations for the vnode recalled. This is done via the 5397 * second function, using the VV_DISABLEDELEG vflag on the vnode. 5398 */ 5399APPLESTATIC void 5400nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 5401{ 5402 time_t starttime; 5403 int error; 5404 5405 /* 5406 * First, check to see if the server is currently running and it has 5407 * been called for a regular file when issuing delegations. 5408 */ 5409 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 5410 nfsrv_issuedelegs == 0) 5411 return; 5412 5413 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5414 /* 5415 * First, get a reference on the nfsv4rootfs_lock so that an 5416 * exclusive lock cannot be acquired by another thread. 5417 */ 5418 NFSLOCKV4ROOTMUTEX(); 5419 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5420 NFSUNLOCKV4ROOTMUTEX(); 5421 5422 /* 5423 * Now, call nfsrv_checkremove() in a loop while it returns 5424 * NFSERR_DELAY. Return upon any other error or when timed out. 5425 */ 5426 starttime = NFSD_MONOSEC; 5427 do { 5428 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5429 error = nfsrv_checkremove(vp, 0, p); 5430 NFSVOPUNLOCK(vp, 0); 5431 } else 5432 error = EPERM; 5433 if (error == NFSERR_DELAY) { 5434 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5435 break; 5436 /* Sleep for a short period of time */ 5437 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5438 } 5439 } while (error == NFSERR_DELAY); 5440 NFSLOCKV4ROOTMUTEX(); 5441 nfsv4_relref(&nfsv4rootfs_lock); 5442 NFSUNLOCKV4ROOTMUTEX(); 5443} 5444 5445APPLESTATIC void 5446nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5447{ 5448 5449#ifdef VV_DISABLEDELEG 5450 /* 5451 * First, flag issuance of delegations disabled. 5452 */ 5453 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5454#endif 5455 5456 /* 5457 * Then call nfsd_recalldelegation() to get rid of all extant 5458 * delegations. 5459 */ 5460 nfsd_recalldelegation(vp, p); 5461} 5462 5463/* 5464 * Check for conflicting locks, etc. and then get rid of delegations. 5465 * (At one point I thought that I should get rid of delegations for any 5466 * Setattr, since it could potentially disallow the I/O op (read or write) 5467 * allowed by the delegation. However, Setattr Ops that aren't changing 5468 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5469 * for the same client or a different one, so I decided to only get rid 5470 * of delegations for other clients when the size is being changed.) 5471 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5472 * as Write backs, even if there is no delegation, so it really isn't any 5473 * different?) 5474 */ 5475APPLESTATIC int 5476nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5477 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5478 struct nfsexstuff *exp, NFSPROC_T *p) 5479{ 5480 struct nfsstate st, *stp = &st; 5481 struct nfslock lo, *lop = &lo; 5482 int error = 0; 5483 nfsquad_t clientid; 5484 5485 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5486 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5487 lop->lo_first = nvap->na_size; 5488 } else { 5489 stp->ls_flags = 0; 5490 lop->lo_first = 0; 5491 } 5492 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5493 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5494 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5495 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5496 stp->ls_flags |= NFSLCK_SETATTR; 5497 if (stp->ls_flags == 0) 5498 goto out; 5499 lop->lo_end = NFS64BITSSET; 5500 lop->lo_flags = NFSLCK_WRITE; 5501 stp->ls_ownerlen = 0; 5502 stp->ls_op = NULL; 5503 stp->ls_uid = nd->nd_cred->cr_uid; 5504 stp->ls_stateid.seqid = stateidp->seqid; 5505 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5506 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5507 stp->ls_stateid.other[2] = stateidp->other[2]; 5508 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5509 stateidp, exp, nd, p); 5510 5511out: 5512 NFSEXITCODE2(error, nd); 5513 return (error); 5514} 5515 5516/* 5517 * Check for a write delegation and do a CBGETATTR if there is one, updating 5518 * the attributes, as required. 5519 * Should I return an error if I can't get the attributes? (For now, I'll 5520 * just return ok. 5521 */ 5522APPLESTATIC int 5523nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5524 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, struct ucred *cred, 5525 NFSPROC_T *p) 5526{ 5527 struct nfsstate *stp; 5528 struct nfslockfile *lfp; 5529 struct nfsclient *clp; 5530 struct nfsvattr nva; 5531 fhandle_t nfh; 5532 int error = 0; 5533 nfsattrbit_t cbbits; 5534 u_quad_t delegfilerev; 5535 5536 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5537 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5538 goto out; 5539 if (nfsrv_writedelegcnt == 0) 5540 goto out; 5541 5542 /* 5543 * Get the lock file structure. 5544 * (A return of -1 means no associated state, so return ok.) 5545 */ 5546 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5547 NFSLOCKSTATE(); 5548 if (!error) 5549 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5550 if (error) { 5551 NFSUNLOCKSTATE(); 5552 if (error == -1) 5553 error = 0; 5554 goto out; 5555 } 5556 5557 /* 5558 * Now, look for a write delegation. 5559 */ 5560 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5561 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5562 break; 5563 } 5564 if (stp == LIST_END(&lfp->lf_deleg)) { 5565 NFSUNLOCKSTATE(); 5566 goto out; 5567 } 5568 clp = stp->ls_clp; 5569 delegfilerev = stp->ls_filerev; 5570 5571 /* 5572 * If the Write delegation was issued as a part of this Compound RPC 5573 * or if we have an Implied Clientid (used in a previous Op in this 5574 * compound) and it is the client the delegation was issued to, 5575 * just return ok. 5576 * I also assume that it is from the same client iff the network 5577 * host IP address is the same as the callback address. (Not 5578 * exactly correct by the RFC, but avoids a lot of Getattr 5579 * callbacks.) 5580 */ 5581 if (nd->nd_compref == stp->ls_compref || 5582 ((nd->nd_flag & ND_IMPLIEDCLID) && 5583 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5584 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5585 NFSUNLOCKSTATE(); 5586 goto out; 5587 } 5588 5589 /* 5590 * We are now done with the delegation state structure, 5591 * so the statelock can be released and we can now tsleep(). 5592 */ 5593 5594 /* 5595 * Now, we must do the CB Getattr callback, to see if Change or Size 5596 * has changed. 5597 */ 5598 if (clp->lc_expiry >= NFSD_MONOSEC) { 5599 NFSUNLOCKSTATE(); 5600 NFSVNO_ATTRINIT(&nva); 5601 nva.na_filerev = NFS64BITSSET; 5602 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5603 0, &nfh, &nva, &cbbits, p); 5604 if (!error) { 5605 if ((nva.na_filerev != NFS64BITSSET && 5606 nva.na_filerev > delegfilerev) || 5607 (NFSVNO_ISSETSIZE(&nva) && 5608 nva.na_size != nvap->na_size)) { 5609 error = nfsvno_updfilerev(vp, nvap, cred, p); 5610 if (NFSVNO_ISSETSIZE(&nva)) 5611 nvap->na_size = nva.na_size; 5612 } 5613 } else 5614 error = 0; /* Ignore callback errors for now. */ 5615 } else { 5616 NFSUNLOCKSTATE(); 5617 } 5618 5619out: 5620 NFSEXITCODE2(error, nd); 5621 return (error); 5622} 5623 5624/* 5625 * This function looks for openowners that haven't had any opens for 5626 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5627 * is set. 5628 */ 5629APPLESTATIC void 5630nfsrv_throwawayopens(NFSPROC_T *p) 5631{ 5632 struct nfsclient *clp, *nclp; 5633 struct nfsstate *stp, *nstp; 5634 int i; 5635 5636 NFSLOCKSTATE(); 5637 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 5638 /* 5639 * For each client... 5640 */ 5641 for (i = 0; i < nfsrv_clienthashsize; i++) { 5642 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5643 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5644 if (LIST_EMPTY(&stp->ls_open) && 5645 (stp->ls_noopens > NFSNOOPEN || 5646 (nfsrv_openpluslock * 2) > 5647 nfsrv_v4statelimit)) 5648 nfsrv_freeopenowner(stp, 0, p); 5649 } 5650 } 5651 } 5652 NFSUNLOCKSTATE(); 5653} 5654 5655/* 5656 * This function checks to see if the credentials are the same. 5657 * Returns 1 for not same, 0 otherwise. 5658 */ 5659static int 5660nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 5661{ 5662 5663 if (nd->nd_flag & ND_GSS) { 5664 if (!(clp->lc_flags & LCL_GSS)) 5665 return (1); 5666 if (clp->lc_flags & LCL_NAME) { 5667 if (nd->nd_princlen != clp->lc_namelen || 5668 NFSBCMP(nd->nd_principal, clp->lc_name, 5669 clp->lc_namelen)) 5670 return (1); 5671 else 5672 return (0); 5673 } 5674 if (nd->nd_cred->cr_uid == clp->lc_uid) 5675 return (0); 5676 else 5677 return (1); 5678 } else if (clp->lc_flags & LCL_GSS) 5679 return (1); 5680 /* 5681 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5682 * in RFC3530, which talks about principals, but doesn't say anything 5683 * about uids for AUTH_SYS.) 5684 */ 5685 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5686 return (0); 5687 else 5688 return (1); 5689} 5690 5691/* 5692 * Calculate the lease expiry time. 5693 */ 5694static time_t 5695nfsrv_leaseexpiry(void) 5696{ 5697 5698 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 5699 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5700 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5701} 5702 5703/* 5704 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5705 */ 5706static void 5707nfsrv_delaydelegtimeout(struct nfsstate *stp) 5708{ 5709 5710 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5711 return; 5712 5713 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5714 stp->ls_delegtime < stp->ls_delegtimelimit) { 5715 stp->ls_delegtime += nfsrv_lease; 5716 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5717 stp->ls_delegtime = stp->ls_delegtimelimit; 5718 } 5719} 5720 5721/* 5722 * This function checks to see if there is any other state associated 5723 * with the openowner for this Open. 5724 * It returns 1 if there is no other state, 0 otherwise. 5725 */ 5726static int 5727nfsrv_nootherstate(struct nfsstate *stp) 5728{ 5729 struct nfsstate *tstp; 5730 5731 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5732 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5733 return (0); 5734 } 5735 return (1); 5736} 5737 5738/* 5739 * Create a list of lock deltas (changes to local byte range locking 5740 * that can be rolled back using the list) and apply the changes via 5741 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5742 * the rollback or update function will be called after this. 5743 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5744 * call fails. If it returns an error, it will unlock the list. 5745 */ 5746static int 5747nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5748 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5749{ 5750 struct nfslock *lop, *nlop; 5751 int error = 0; 5752 5753 /* Loop through the list of locks. */ 5754 lop = LIST_FIRST(&lfp->lf_locallock); 5755 while (first < end && lop != NULL) { 5756 nlop = LIST_NEXT(lop, lo_lckowner); 5757 if (first >= lop->lo_end) { 5758 /* not there yet */ 5759 lop = nlop; 5760 } else if (first < lop->lo_first) { 5761 /* new one starts before entry in list */ 5762 if (end <= lop->lo_first) { 5763 /* no overlap between old and new */ 5764 error = nfsrv_dolocal(vp, lfp, flags, 5765 NFSLCK_UNLOCK, first, end, cfp, p); 5766 if (error != 0) 5767 break; 5768 first = end; 5769 } else { 5770 /* handle fragment overlapped with new one */ 5771 error = nfsrv_dolocal(vp, lfp, flags, 5772 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5773 p); 5774 if (error != 0) 5775 break; 5776 first = lop->lo_first; 5777 } 5778 } else { 5779 /* new one overlaps this entry in list */ 5780 if (end <= lop->lo_end) { 5781 /* overlaps all of new one */ 5782 error = nfsrv_dolocal(vp, lfp, flags, 5783 lop->lo_flags, first, end, cfp, p); 5784 if (error != 0) 5785 break; 5786 first = end; 5787 } else { 5788 /* handle fragment overlapped with new one */ 5789 error = nfsrv_dolocal(vp, lfp, flags, 5790 lop->lo_flags, first, lop->lo_end, cfp, p); 5791 if (error != 0) 5792 break; 5793 first = lop->lo_end; 5794 lop = nlop; 5795 } 5796 } 5797 } 5798 if (first < end && error == 0) 5799 /* handle fragment past end of list */ 5800 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5801 end, cfp, p); 5802 5803 NFSEXITCODE(error); 5804 return (error); 5805} 5806 5807/* 5808 * Local lock unlock. Unlock all byte ranges that are no longer locked 5809 * by NFSv4. To do this, unlock any subranges of first-->end that 5810 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5811 * list. This list has all locks for the file held by other 5812 * <clientid, lockowner> tuples. The list is ordered by increasing 5813 * lo_first value, but may have entries that overlap each other, for 5814 * the case of read locks. 5815 */ 5816static void 5817nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5818 uint64_t init_end, NFSPROC_T *p) 5819{ 5820 struct nfslock *lop; 5821 uint64_t first, end, prevfirst; 5822 5823 first = init_first; 5824 end = init_end; 5825 while (first < init_end) { 5826 /* Loop through all nfs locks, adjusting first and end */ 5827 prevfirst = 0; 5828 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5829 KASSERT(prevfirst <= lop->lo_first, 5830 ("nfsv4 locks out of order")); 5831 KASSERT(lop->lo_first < lop->lo_end, 5832 ("nfsv4 bogus lock")); 5833 prevfirst = lop->lo_first; 5834 if (first >= lop->lo_first && 5835 first < lop->lo_end) 5836 /* 5837 * Overlaps with initial part, so trim 5838 * off that initial part by moving first past 5839 * it. 5840 */ 5841 first = lop->lo_end; 5842 else if (end > lop->lo_first && 5843 lop->lo_first > first) { 5844 /* 5845 * This lock defines the end of the 5846 * segment to unlock, so set end to the 5847 * start of it and break out of the loop. 5848 */ 5849 end = lop->lo_first; 5850 break; 5851 } 5852 if (first >= end) 5853 /* 5854 * There is no segment left to do, so 5855 * break out of this loop and then exit 5856 * the outer while() since first will be set 5857 * to end, which must equal init_end here. 5858 */ 5859 break; 5860 } 5861 if (first < end) { 5862 /* Unlock this segment */ 5863 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 5864 NFSLCK_READ, first, end, NULL, p); 5865 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 5866 first, end); 5867 } 5868 /* 5869 * Now move past this segment and look for any further 5870 * segment in the range, if there is one. 5871 */ 5872 first = end; 5873 end = init_end; 5874 } 5875} 5876 5877/* 5878 * Do the local lock operation and update the rollback list, as required. 5879 * Perform the rollback and return the error if nfsvno_advlock() fails. 5880 */ 5881static int 5882nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 5883 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5884{ 5885 struct nfsrollback *rlp; 5886 int error = 0, ltype, oldltype; 5887 5888 if (flags & NFSLCK_WRITE) 5889 ltype = F_WRLCK; 5890 else if (flags & NFSLCK_READ) 5891 ltype = F_RDLCK; 5892 else 5893 ltype = F_UNLCK; 5894 if (oldflags & NFSLCK_WRITE) 5895 oldltype = F_WRLCK; 5896 else if (oldflags & NFSLCK_READ) 5897 oldltype = F_RDLCK; 5898 else 5899 oldltype = F_UNLCK; 5900 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 5901 /* nothing to do */ 5902 goto out; 5903 error = nfsvno_advlock(vp, ltype, first, end, p); 5904 if (error != 0) { 5905 if (cfp != NULL) { 5906 cfp->cl_clientid.lval[0] = 0; 5907 cfp->cl_clientid.lval[1] = 0; 5908 cfp->cl_first = 0; 5909 cfp->cl_end = NFS64BITSSET; 5910 cfp->cl_flags = NFSLCK_WRITE; 5911 cfp->cl_ownerlen = 5; 5912 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 5913 } 5914 nfsrv_locallock_rollback(vp, lfp, p); 5915 } else if (ltype != F_UNLCK) { 5916 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 5917 M_WAITOK); 5918 rlp->rlck_first = first; 5919 rlp->rlck_end = end; 5920 rlp->rlck_type = oldltype; 5921 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 5922 } 5923 5924out: 5925 NFSEXITCODE(error); 5926 return (error); 5927} 5928 5929/* 5930 * Roll back local lock changes and free up the rollback list. 5931 */ 5932static void 5933nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 5934{ 5935 struct nfsrollback *rlp, *nrlp; 5936 5937 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 5938 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 5939 rlp->rlck_end, p); 5940 free(rlp, M_NFSDROLLBACK); 5941 } 5942 LIST_INIT(&lfp->lf_rollback); 5943} 5944 5945/* 5946 * Update local lock list and delete rollback list (ie now committed to the 5947 * local locks). Most of the work is done by the internal function. 5948 */ 5949static void 5950nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 5951 uint64_t end) 5952{ 5953 struct nfsrollback *rlp, *nrlp; 5954 struct nfslock *new_lop, *other_lop; 5955 5956 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 5957 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 5958 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 5959 M_WAITOK); 5960 else 5961 other_lop = NULL; 5962 new_lop->lo_flags = flags; 5963 new_lop->lo_first = first; 5964 new_lop->lo_end = end; 5965 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 5966 if (new_lop != NULL) 5967 free(new_lop, M_NFSDLOCK); 5968 if (other_lop != NULL) 5969 free(other_lop, M_NFSDLOCK); 5970 5971 /* and get rid of the rollback list */ 5972 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 5973 free(rlp, M_NFSDROLLBACK); 5974 LIST_INIT(&lfp->lf_rollback); 5975} 5976 5977/* 5978 * Lock the struct nfslockfile for local lock updating. 5979 */ 5980static void 5981nfsrv_locklf(struct nfslockfile *lfp) 5982{ 5983 int gotlock; 5984 5985 /* lf_usecount ensures *lfp won't be free'd */ 5986 lfp->lf_usecount++; 5987 do { 5988 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 5989 NFSSTATEMUTEXPTR, NULL); 5990 } while (gotlock == 0); 5991 lfp->lf_usecount--; 5992} 5993 5994/* 5995 * Unlock the struct nfslockfile after local lock updating. 5996 */ 5997static void 5998nfsrv_unlocklf(struct nfslockfile *lfp) 5999{ 6000 6001 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 6002} 6003 6004/* 6005 * Clear out all state for the NFSv4 server. 6006 * Must be called by a thread that can sleep when no nfsds are running. 6007 */ 6008void 6009nfsrv_throwawayallstate(NFSPROC_T *p) 6010{ 6011 struct nfsclient *clp, *nclp; 6012 struct nfslockfile *lfp, *nlfp; 6013 int i; 6014 6015 /* 6016 * For each client, clean out the state and then free the structure. 6017 */ 6018 for (i = 0; i < nfsrv_clienthashsize; i++) { 6019 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 6020 nfsrv_cleanclient(clp, p); 6021 nfsrv_freedeleglist(&clp->lc_deleg); 6022 nfsrv_freedeleglist(&clp->lc_olddeleg); 6023 free(clp->lc_stateid, M_NFSDCLIENT); 6024 free(clp, M_NFSDCLIENT); 6025 } 6026 } 6027 6028 /* 6029 * Also, free up any remaining lock file structures. 6030 */ 6031 for (i = 0; i < nfsrv_lockhashsize; i++) { 6032 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) { 6033 printf("nfsd unload: fnd a lock file struct\n"); 6034 nfsrv_freenfslockfile(lfp); 6035 } 6036 } 6037} 6038 6039/* 6040 * Check the sequence# for the session and slot provided as an argument. 6041 * Also, renew the lease if the session will return NFS_OK. 6042 */ 6043int 6044nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 6045 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 6046 uint32_t *sflagsp, NFSPROC_T *p) 6047{ 6048 struct nfsdsession *sep; 6049 struct nfssessionhash *shp; 6050 int error; 6051 SVCXPRT *savxprt; 6052 6053 shp = NFSSESSIONHASH(nd->nd_sessionid); 6054 NFSLOCKSESSION(shp); 6055 sep = nfsrv_findsession(nd->nd_sessionid); 6056 if (sep == NULL) { 6057 NFSUNLOCKSESSION(shp); 6058 return (NFSERR_BADSESSION); 6059 } 6060 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 6061 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 6062 if (error != 0) { 6063 NFSUNLOCKSESSION(shp); 6064 return (error); 6065 } 6066 if (cache_this != 0) 6067 nd->nd_flag |= ND_SAVEREPLY; 6068 /* Renew the lease. */ 6069 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 6070 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 6071 nd->nd_flag |= ND_IMPLIEDCLID; 6072 6073 /* 6074 * If this session handles the backchannel, save the nd_xprt for this 6075 * RPC, since this is the one being used. 6076 * RFC-5661 specifies that the fore channel will be implicitly 6077 * bound by a Sequence operation. However, since some NFSv4.1 clients 6078 * erroneously assumed that the back channel would be implicitly 6079 * bound as well, do the implicit binding unless a 6080 * BindConnectiontoSession has already been done on the session. 6081 */ 6082 if (sep->sess_clp->lc_req.nr_client != NULL && 6083 sep->sess_cbsess.nfsess_xprt != nd->nd_xprt && 6084 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0 && 6085 (sep->sess_clp->lc_flags & LCL_DONEBINDCONN) == 0) { 6086 NFSD_DEBUG(2, 6087 "nfsrv_checksequence: implicit back channel bind\n"); 6088 savxprt = sep->sess_cbsess.nfsess_xprt; 6089 SVC_ACQUIRE(nd->nd_xprt); 6090 nd->nd_xprt->xp_p2 = 6091 sep->sess_clp->lc_req.nr_client->cl_private; 6092 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */ 6093 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6094 if (savxprt != NULL) 6095 SVC_RELEASE(savxprt); 6096 } 6097 6098 *sflagsp = 0; 6099 if (sep->sess_clp->lc_req.nr_client == NULL) 6100 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 6101 NFSUNLOCKSESSION(shp); 6102 if (error == NFSERR_EXPIRED) { 6103 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 6104 error = 0; 6105 } else if (error == NFSERR_ADMINREVOKED) { 6106 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 6107 error = 0; 6108 } 6109 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 6110 return (0); 6111} 6112 6113/* 6114 * Check/set reclaim complete for this session/clientid. 6115 */ 6116int 6117nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd, int onefs) 6118{ 6119 struct nfsdsession *sep; 6120 struct nfssessionhash *shp; 6121 int error = 0; 6122 6123 shp = NFSSESSIONHASH(nd->nd_sessionid); 6124 NFSLOCKSTATE(); 6125 NFSLOCKSESSION(shp); 6126 sep = nfsrv_findsession(nd->nd_sessionid); 6127 if (sep == NULL) { 6128 NFSUNLOCKSESSION(shp); 6129 NFSUNLOCKSTATE(); 6130 return (NFSERR_BADSESSION); 6131 } 6132 6133 if (onefs != 0) 6134 sep->sess_clp->lc_flags |= LCL_RECLAIMONEFS; 6135 /* Check to see if reclaim complete has already happened. */ 6136 else if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 6137 error = NFSERR_COMPLETEALREADY; 6138 else { 6139 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 6140 nfsrv_markreclaim(sep->sess_clp); 6141 } 6142 NFSUNLOCKSESSION(shp); 6143 NFSUNLOCKSTATE(); 6144 return (error); 6145} 6146 6147/* 6148 * Cache the reply in a session slot. 6149 */ 6150void 6151nfsrv_cache_session(uint8_t *sessionid, uint32_t slotid, int repstat, 6152 struct mbuf **m) 6153{ 6154 struct nfsdsession *sep; 6155 struct nfssessionhash *shp; 6156 6157 shp = NFSSESSIONHASH(sessionid); 6158 NFSLOCKSESSION(shp); 6159 sep = nfsrv_findsession(sessionid); 6160 if (sep == NULL) { 6161 NFSUNLOCKSESSION(shp); 6162 printf("nfsrv_cache_session: no session\n"); 6163 m_freem(*m); 6164 return; 6165 } 6166 nfsv4_seqsess_cacherep(slotid, sep->sess_slots, repstat, m); 6167 NFSUNLOCKSESSION(shp); 6168} 6169 6170/* 6171 * Search for a session that matches the sessionid. 6172 */ 6173static struct nfsdsession * 6174nfsrv_findsession(uint8_t *sessionid) 6175{ 6176 struct nfsdsession *sep; 6177 struct nfssessionhash *shp; 6178 6179 shp = NFSSESSIONHASH(sessionid); 6180 LIST_FOREACH(sep, &shp->list, sess_hash) { 6181 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 6182 break; 6183 } 6184 return (sep); 6185} 6186 6187/* 6188 * Destroy a session. 6189 */ 6190int 6191nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 6192{ 6193 int error, igotlock, samesess; 6194 6195 samesess = 0; 6196 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID) && 6197 (nd->nd_flag & ND_HASSEQUENCE) != 0) { 6198 samesess = 1; 6199 if ((nd->nd_flag & ND_LASTOP) == 0) 6200 return (NFSERR_BADSESSION); 6201 } 6202 6203 /* Lock out other nfsd threads */ 6204 NFSLOCKV4ROOTMUTEX(); 6205 nfsv4_relref(&nfsv4rootfs_lock); 6206 do { 6207 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 6208 NFSV4ROOTLOCKMUTEXPTR, NULL); 6209 } while (igotlock == 0); 6210 NFSUNLOCKV4ROOTMUTEX(); 6211 6212 error = nfsrv_freesession(NULL, sessionid); 6213 if (error == 0 && samesess != 0) 6214 nd->nd_flag &= ~ND_HASSEQUENCE; 6215 6216 NFSLOCKV4ROOTMUTEX(); 6217 nfsv4_unlock(&nfsv4rootfs_lock, 1); 6218 NFSUNLOCKV4ROOTMUTEX(); 6219 return (error); 6220} 6221 6222/* 6223 * Bind a connection to a session. 6224 * For now, only certain variants are supported, since the current session 6225 * structure can only handle a single backchannel entry, which will be 6226 * applied to all connections if it is set. 6227 */ 6228int 6229nfsrv_bindconnsess(struct nfsrv_descript *nd, uint8_t *sessionid, int *foreaftp) 6230{ 6231 struct nfssessionhash *shp; 6232 struct nfsdsession *sep; 6233 struct nfsclient *clp; 6234 SVCXPRT *savxprt; 6235 int error; 6236 6237 error = 0; 6238 shp = NFSSESSIONHASH(sessionid); 6239 NFSLOCKSTATE(); 6240 NFSLOCKSESSION(shp); 6241 sep = nfsrv_findsession(sessionid); 6242 if (sep != NULL) { 6243 clp = sep->sess_clp; 6244 if (*foreaftp == NFSCDFC4_BACK || 6245 *foreaftp == NFSCDFC4_BACK_OR_BOTH || 6246 *foreaftp == NFSCDFC4_FORE_OR_BOTH) { 6247 /* Try to set up a backchannel. */ 6248 if (clp->lc_req.nr_client == NULL) { 6249 NFSD_DEBUG(2, "nfsrv_bindconnsess: acquire " 6250 "backchannel\n"); 6251 clp->lc_req.nr_client = (struct __rpc_client *) 6252 clnt_bck_create(nd->nd_xprt->xp_socket, 6253 sep->sess_cbprogram, NFSV4_CBVERS); 6254 } 6255 if (clp->lc_req.nr_client != NULL) { 6256 NFSD_DEBUG(2, "nfsrv_bindconnsess: set up " 6257 "backchannel\n"); 6258 savxprt = sep->sess_cbsess.nfsess_xprt; 6259 SVC_ACQUIRE(nd->nd_xprt); 6260 nd->nd_xprt->xp_p2 = 6261 clp->lc_req.nr_client->cl_private; 6262 /* Disable idle timeout. */ 6263 nd->nd_xprt->xp_idletimeout = 0; 6264 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 6265 if (savxprt != NULL) 6266 SVC_RELEASE(savxprt); 6267 sep->sess_crflags |= NFSV4CRSESS_CONNBACKCHAN; 6268 clp->lc_flags |= LCL_DONEBINDCONN; 6269 if (*foreaftp == NFSCDFS4_BACK) 6270 *foreaftp = NFSCDFS4_BACK; 6271 else 6272 *foreaftp = NFSCDFS4_BOTH; 6273 } else if (*foreaftp != NFSCDFC4_BACK) { 6274 NFSD_DEBUG(2, "nfsrv_bindconnsess: can't set " 6275 "up backchannel\n"); 6276 sep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 6277 clp->lc_flags |= LCL_DONEBINDCONN; 6278 *foreaftp = NFSCDFS4_FORE; 6279 } else { 6280 error = NFSERR_NOTSUPP; 6281 printf("nfsrv_bindconnsess: Can't add " 6282 "backchannel\n"); 6283 } 6284 } else { 6285 NFSD_DEBUG(2, "nfsrv_bindconnsess: Set forechannel\n"); 6286 clp->lc_flags |= LCL_DONEBINDCONN; 6287 *foreaftp = NFSCDFS4_FORE; 6288 } 6289 } else 6290 error = NFSERR_BADSESSION; 6291 NFSUNLOCKSESSION(shp); 6292 NFSUNLOCKSTATE(); 6293 return (error); 6294} 6295 6296/* 6297 * Free up a session structure. 6298 */ 6299static int 6300nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid) 6301{ 6302 struct nfssessionhash *shp; 6303 int i; 6304 6305 NFSLOCKSTATE(); 6306 if (sep == NULL) { 6307 shp = NFSSESSIONHASH(sessionid); 6308 NFSLOCKSESSION(shp); 6309 sep = nfsrv_findsession(sessionid); 6310 } else { 6311 shp = NFSSESSIONHASH(sep->sess_sessionid); 6312 NFSLOCKSESSION(shp); 6313 } 6314 if (sep != NULL) { 6315 sep->sess_refcnt--; 6316 if (sep->sess_refcnt > 0) { 6317 NFSUNLOCKSESSION(shp); 6318 NFSUNLOCKSTATE(); 6319 return (NFSERR_BACKCHANBUSY); 6320 } 6321 LIST_REMOVE(sep, sess_hash); 6322 LIST_REMOVE(sep, sess_list); 6323 } 6324 NFSUNLOCKSESSION(shp); 6325 NFSUNLOCKSTATE(); 6326 if (sep == NULL) 6327 return (NFSERR_BADSESSION); 6328 for (i = 0; i < NFSV4_SLOTS; i++) 6329 if (sep->sess_slots[i].nfssl_reply != NULL) 6330 m_freem(sep->sess_slots[i].nfssl_reply); 6331 if (sep->sess_cbsess.nfsess_xprt != NULL) 6332 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 6333 free(sep, M_NFSDSESSION); 6334 return (0); 6335} 6336 6337/* 6338 * Free a stateid. 6339 * RFC5661 says that it should fail when there are associated opens, locks 6340 * or delegations. Since stateids represent opens, I don't see how you can 6341 * free an open stateid (it will be free'd when closed), so this function 6342 * only works for lock stateids (freeing the lock_owner) or delegations. 6343 */ 6344int 6345nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6346 NFSPROC_T *p) 6347{ 6348 struct nfsclient *clp; 6349 struct nfsstate *stp; 6350 int error; 6351 6352 NFSLOCKSTATE(); 6353 /* 6354 * Look up the stateid 6355 */ 6356 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6357 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6358 if (error == 0) { 6359 /* First, check for a delegation. */ 6360 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 6361 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 6362 NFSX_STATEIDOTHER)) 6363 break; 6364 } 6365 if (stp != NULL) { 6366 nfsrv_freedeleg(stp); 6367 NFSUNLOCKSTATE(); 6368 return (error); 6369 } 6370 } 6371 /* Not a delegation, try for a lock_owner. */ 6372 if (error == 0) 6373 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6374 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 6375 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 6376 /* Not a lock_owner stateid. */ 6377 error = NFSERR_LOCKSHELD; 6378 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 6379 error = NFSERR_LOCKSHELD; 6380 if (error == 0) 6381 nfsrv_freelockowner(stp, NULL, 0, p); 6382 NFSUNLOCKSTATE(); 6383 return (error); 6384} 6385 6386/* 6387 * Test a stateid. 6388 */ 6389int 6390nfsrv_teststateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 6391 NFSPROC_T *p) 6392{ 6393 struct nfsclient *clp; 6394 struct nfsstate *stp; 6395 int error; 6396 6397 NFSLOCKSTATE(); 6398 /* 6399 * Look up the stateid 6400 */ 6401 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 6402 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 6403 if (error == 0) 6404 error = nfsrv_getstate(clp, stateidp, 0, &stp); 6405 if (error == 0 && stateidp->seqid != 0 && 6406 SEQ_LT(stateidp->seqid, stp->ls_stateid.seqid)) 6407 error = NFSERR_OLDSTATEID; 6408 NFSUNLOCKSTATE(); 6409 return (error); 6410} 6411 6412/* 6413 * Generate the xdr for an NFSv4.1 CBSequence Operation. 6414 */ 6415static int 6416nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 6417 int dont_replycache, struct nfsdsession **sepp) 6418{ 6419 struct nfsdsession *sep; 6420 uint32_t *tl, slotseq = 0; 6421 int maxslot, slotpos; 6422 uint8_t sessionid[NFSX_V4SESSIONID]; 6423 int error; 6424 6425 error = nfsv4_getcbsession(clp, sepp); 6426 if (error != 0) 6427 return (error); 6428 sep = *sepp; 6429 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot, 6430 &slotseq, sessionid); 6431 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 6432 6433 /* Build the Sequence arguments. */ 6434 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 6435 bcopy(sessionid, tl, NFSX_V4SESSIONID); 6436 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 6437 nd->nd_slotseq = tl; 6438 *tl++ = txdr_unsigned(slotseq); 6439 *tl++ = txdr_unsigned(slotpos); 6440 *tl++ = txdr_unsigned(maxslot); 6441 if (dont_replycache == 0) 6442 *tl++ = newnfs_true; 6443 else 6444 *tl++ = newnfs_false; 6445 *tl = 0; /* No referring call list, for now. */ 6446 nd->nd_flag |= ND_HASSEQUENCE; 6447 return (0); 6448} 6449 6450/* 6451 * Get a session for the callback. 6452 */ 6453static int 6454nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 6455{ 6456 struct nfsdsession *sep; 6457 6458 NFSLOCKSTATE(); 6459 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6460 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 6461 break; 6462 } 6463 if (sep == NULL) { 6464 NFSUNLOCKSTATE(); 6465 return (NFSERR_BADSESSION); 6466 } 6467 sep->sess_refcnt++; 6468 *sepp = sep; 6469 NFSUNLOCKSTATE(); 6470 return (0); 6471} 6472 6473/* 6474 * Free up all backchannel xprts. This needs to be done when the nfsd threads 6475 * exit, since those transports will all be going away. 6476 * This is only called after all the nfsd threads are done performing RPCs, 6477 * so locking shouldn't be an issue. 6478 */ 6479APPLESTATIC void 6480nfsrv_freeallbackchannel_xprts(void) 6481{ 6482 struct nfsdsession *sep; 6483 struct nfsclient *clp; 6484 SVCXPRT *xprt; 6485 int i; 6486 6487 for (i = 0; i < nfsrv_clienthashsize; i++) { 6488 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 6489 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6490 xprt = sep->sess_cbsess.nfsess_xprt; 6491 sep->sess_cbsess.nfsess_xprt = NULL; 6492 if (xprt != NULL) 6493 SVC_RELEASE(xprt); 6494 } 6495 } 6496 } 6497} 6498 6499