nfs_nfsdstate.c revision 308241
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 308241 2016-11-03 00:58:50Z rmacklem $"); 30 31#ifndef APPLEKEXT 32#include <fs/nfs/nfsport.h> 33 34struct nfsrv_stablefirst nfsrv_stablefirst; 35int nfsrv_issuedelegs = 0; 36int nfsrv_dolocallocks = 0; 37struct nfsv4lock nfsv4rootfs_lock; 38 39extern int newnfs_numnfsd; 40extern struct nfsstats newnfsstats; 41extern int nfsrv_lease; 42extern struct timeval nfsboottime; 43extern u_int32_t newnfs_true, newnfs_false; 44NFSV4ROOTLOCKMUTEX; 45NFSSTATESPINLOCK; 46 47SYSCTL_DECL(_vfs_nfsd); 48int nfsrv_statehashsize = NFSSTATEHASHSIZE; 49TUNABLE_INT("vfs.nfsd.statehashsize", &nfsrv_statehashsize); 50SYSCTL_INT(_vfs_nfsd, OID_AUTO, statehashsize, CTLFLAG_RDTUN, 51 &nfsrv_statehashsize, 0, 52 "Size of state hash table set via loader.conf"); 53 54int nfsrv_clienthashsize = NFSCLIENTHASHSIZE; 55TUNABLE_INT("vfs.nfsd.clienthashsize", &nfsrv_clienthashsize); 56SYSCTL_INT(_vfs_nfsd, OID_AUTO, clienthashsize, CTLFLAG_RDTUN, 57 &nfsrv_clienthashsize, 0, 58 "Size of client hash table set via loader.conf"); 59 60int nfsrv_lockhashsize = NFSLOCKHASHSIZE; 61TUNABLE_INT("vfs.nfsd.fhhashsize", &nfsrv_lockhashsize); 62SYSCTL_INT(_vfs_nfsd, OID_AUTO, fhhashsize, CTLFLAG_RDTUN, 63 &nfsrv_lockhashsize, 0, 64 "Size of file handle hash table set via loader.conf"); 65 66int nfsrv_sessionhashsize = NFSSESSIONHASHSIZE; 67TUNABLE_INT("vfs.nfsd.sessionhashsize", &nfsrv_sessionhashsize); 68SYSCTL_INT(_vfs_nfsd, OID_AUTO, sessionhashsize, CTLFLAG_RDTUN, 69 &nfsrv_sessionhashsize, 0, 70 "Size of session hash table set via loader.conf"); 71 72static int nfsrv_v4statelimit = NFSRV_V4STATELIMIT; 73TUNABLE_INT("vfs.nfsd.v4statelimit", &nfsrv_v4statelimit); 74SYSCTL_INT(_vfs_nfsd, OID_AUTO, v4statelimit, CTLFLAG_RWTUN, 75 &nfsrv_v4statelimit, 0, 76 "High water limit for NFSv4 opens+locks+delegations"); 77 78static int nfsrv_writedelegifpos = 0; 79SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW, 80 &nfsrv_writedelegifpos, 0, 81 "Issue a write delegation for read opens if possible"); 82 83/* 84 * Hash lists for nfs V4. 85 */ 86struct nfsclienthashhead *nfsclienthash; 87struct nfslockhashhead *nfslockhash; 88struct nfssessionhash *nfssessionhash; 89#endif /* !APPLEKEXT */ 90 91static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0; 92static time_t nfsrvboottime; 93static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0; 94static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; 95static int nfsrv_nogsscallback = 0; 96 97/* local functions */ 98static void nfsrv_dumpaclient(struct nfsclient *clp, 99 struct nfsd_dumpclients *dumpp); 100static void nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, 101 NFSPROC_T *p); 102static int nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, 103 NFSPROC_T *p); 104static void nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 105 NFSPROC_T *p); 106static void nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, 107 int cansleep, NFSPROC_T *p); 108static void nfsrv_freenfslock(struct nfslock *lop); 109static void nfsrv_freenfslockfile(struct nfslockfile *lfp); 110static void nfsrv_freedeleg(struct nfsstate *); 111static int nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, 112 u_int32_t flags, struct nfsstate **stpp); 113static void nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 114 struct nfsstate **stpp); 115static int nfsrv_getlockfh(vnode_t vp, u_short flags, 116 struct nfslockfile *new_lfp, fhandle_t *nfhp, NFSPROC_T *p); 117static int nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 118 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit); 119static void nfsrv_insertlock(struct nfslock *new_lop, 120 struct nfslock *insert_lop, struct nfsstate *stp, struct nfslockfile *lfp); 121static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 122 struct nfslock **other_lopp, struct nfslockfile *lfp); 123static int nfsrv_getipnumber(u_char *cp); 124static int nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 125 nfsv4stateid_t *stateidp, int specialid); 126static int nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 127 u_int32_t flags); 128static int nfsrv_docallback(struct nfsclient *clp, int procnum, 129 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 130 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p); 131static int nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 132 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp); 133static u_int32_t nfsrv_nextclientindex(void); 134static u_int32_t nfsrv_nextstateindex(struct nfsclient *clp); 135static void nfsrv_markstable(struct nfsclient *clp); 136static int nfsrv_checkstable(struct nfsclient *clp); 137static int nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, struct 138 vnode *vp, NFSPROC_T *p); 139static int nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, 140 NFSPROC_T *p, vnode_t vp); 141static int nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 142 struct nfsclient *clp, int *haslockp, NFSPROC_T *p); 143static int nfsrv_notsamecredname(struct nfsrv_descript *nd, 144 struct nfsclient *clp); 145static time_t nfsrv_leaseexpiry(void); 146static void nfsrv_delaydelegtimeout(struct nfsstate *stp); 147static int nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 148 struct nfsstate *stp, struct nfsrvcache *op); 149static int nfsrv_nootherstate(struct nfsstate *stp); 150static int nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 151 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p); 152static void nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, 153 uint64_t init_first, uint64_t init_end, NFSPROC_T *p); 154static int nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, 155 int oldflags, uint64_t first, uint64_t end, struct nfslockconflict *cfp, 156 NFSPROC_T *p); 157static void nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, 158 NFSPROC_T *p); 159static void nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, 160 uint64_t first, uint64_t end); 161static void nfsrv_locklf(struct nfslockfile *lfp); 162static void nfsrv_unlocklf(struct nfslockfile *lfp); 163static struct nfsdsession *nfsrv_findsession(uint8_t *sessionid); 164static int nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid); 165static int nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 166 int dont_replycache, struct nfsdsession **sepp); 167static int nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp); 168 169/* 170 * Scan the client list for a match and either return the current one, 171 * create a new entry or return an error. 172 * If returning a non-error, the clp structure must either be linked into 173 * the client list or free'd. 174 */ 175APPLESTATIC int 176nfsrv_setclient(struct nfsrv_descript *nd, struct nfsclient **new_clpp, 177 nfsquad_t *clientidp, nfsquad_t *confirmp, NFSPROC_T *p) 178{ 179 struct nfsclient *clp = NULL, *new_clp = *new_clpp; 180 int i, error = 0; 181 struct nfsstate *stp, *tstp; 182 struct sockaddr_in *sad, *rad; 183 int zapit = 0, gotit, hasstate = 0, igotlock; 184 static u_int64_t confirm_index = 0; 185 186 /* 187 * Check for state resource limit exceeded. 188 */ 189 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 190 error = NFSERR_RESOURCE; 191 goto out; 192 } 193 194 if (nfsrv_issuedelegs == 0 || 195 ((nd->nd_flag & ND_GSS) != 0 && nfsrv_nogsscallback != 0)) 196 /* 197 * Don't do callbacks when delegations are disabled or 198 * for AUTH_GSS unless enabled via nfsrv_nogsscallback. 199 * If establishing a callback connection is attempted 200 * when a firewall is blocking the callback path, the 201 * server may wait too long for the connect attempt to 202 * succeed during the Open. Some clients, such as Linux, 203 * may timeout and give up on the Open before the server 204 * replies. Also, since AUTH_GSS callbacks are not 205 * yet interoperability tested, they might cause the 206 * server to crap out, if they get past the Init call to 207 * the client. 208 */ 209 new_clp->lc_program = 0; 210 211 /* Lock out other nfsd threads */ 212 NFSLOCKV4ROOTMUTEX(); 213 nfsv4_relref(&nfsv4rootfs_lock); 214 do { 215 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 216 NFSV4ROOTLOCKMUTEXPTR, NULL); 217 } while (!igotlock); 218 NFSUNLOCKV4ROOTMUTEX(); 219 220 /* 221 * Search for a match in the client list. 222 */ 223 gotit = i = 0; 224 while (i < nfsrv_clienthashsize && !gotit) { 225 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 226 if (new_clp->lc_idlen == clp->lc_idlen && 227 !NFSBCMP(new_clp->lc_id, clp->lc_id, clp->lc_idlen)) { 228 gotit = 1; 229 break; 230 } 231 } 232 if (gotit == 0) 233 i++; 234 } 235 if (!gotit || 236 (clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_ADMINREVOKED))) { 237 if ((nd->nd_flag & ND_NFSV41) != 0 && confirmp->lval[1] != 0) { 238 /* 239 * For NFSv4.1, if confirmp->lval[1] is non-zero, the 240 * client is trying to update a confirmed clientid. 241 */ 242 NFSLOCKV4ROOTMUTEX(); 243 nfsv4_unlock(&nfsv4rootfs_lock, 1); 244 NFSUNLOCKV4ROOTMUTEX(); 245 confirmp->lval[1] = 0; 246 error = NFSERR_NOENT; 247 goto out; 248 } 249 /* 250 * Get rid of the old one. 251 */ 252 if (i != nfsrv_clienthashsize) { 253 LIST_REMOVE(clp, lc_hash); 254 nfsrv_cleanclient(clp, p); 255 nfsrv_freedeleglist(&clp->lc_deleg); 256 nfsrv_freedeleglist(&clp->lc_olddeleg); 257 zapit = 1; 258 } 259 /* 260 * Add it after assigning a client id to it. 261 */ 262 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 263 if ((nd->nd_flag & ND_NFSV41) != 0) 264 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 265 ++confirm_index; 266 else 267 confirmp->qval = new_clp->lc_confirm.qval = 268 ++confirm_index; 269 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 270 (u_int32_t)nfsrvboottime; 271 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 272 nfsrv_nextclientindex(); 273 new_clp->lc_stateindex = 0; 274 new_clp->lc_statemaxindex = 0; 275 new_clp->lc_cbref = 0; 276 new_clp->lc_expiry = nfsrv_leaseexpiry(); 277 LIST_INIT(&new_clp->lc_open); 278 LIST_INIT(&new_clp->lc_deleg); 279 LIST_INIT(&new_clp->lc_olddeleg); 280 LIST_INIT(&new_clp->lc_session); 281 for (i = 0; i < nfsrv_statehashsize; i++) 282 LIST_INIT(&new_clp->lc_stateid[i]); 283 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 284 lc_hash); 285 newnfsstats.srvclients++; 286 nfsrv_openpluslock++; 287 nfsrv_clients++; 288 NFSLOCKV4ROOTMUTEX(); 289 nfsv4_unlock(&nfsv4rootfs_lock, 1); 290 NFSUNLOCKV4ROOTMUTEX(); 291 if (zapit) 292 nfsrv_zapclient(clp, p); 293 *new_clpp = NULL; 294 goto out; 295 } 296 297 /* 298 * Now, handle the cases where the id is already issued. 299 */ 300 if (nfsrv_notsamecredname(nd, clp)) { 301 /* 302 * Check to see if there is expired state that should go away. 303 */ 304 if (clp->lc_expiry < NFSD_MONOSEC && 305 (!LIST_EMPTY(&clp->lc_open) || !LIST_EMPTY(&clp->lc_deleg))) { 306 nfsrv_cleanclient(clp, p); 307 nfsrv_freedeleglist(&clp->lc_deleg); 308 } 309 310 /* 311 * If there is outstanding state, then reply NFSERR_CLIDINUSE per 312 * RFC3530 Sec. 8.1.2 last para. 313 */ 314 if (!LIST_EMPTY(&clp->lc_deleg)) { 315 hasstate = 1; 316 } else if (LIST_EMPTY(&clp->lc_open)) { 317 hasstate = 0; 318 } else { 319 hasstate = 0; 320 /* Look for an Open on the OpenOwner */ 321 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 322 if (!LIST_EMPTY(&stp->ls_open)) { 323 hasstate = 1; 324 break; 325 } 326 } 327 } 328 if (hasstate) { 329 /* 330 * If the uid doesn't match, return NFSERR_CLIDINUSE after 331 * filling out the correct ipaddr and portnum. 332 */ 333 sad = NFSSOCKADDR(new_clp->lc_req.nr_nam, struct sockaddr_in *); 334 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 335 sad->sin_addr.s_addr = rad->sin_addr.s_addr; 336 sad->sin_port = rad->sin_port; 337 NFSLOCKV4ROOTMUTEX(); 338 nfsv4_unlock(&nfsv4rootfs_lock, 1); 339 NFSUNLOCKV4ROOTMUTEX(); 340 error = NFSERR_CLIDINUSE; 341 goto out; 342 } 343 } 344 345 if (NFSBCMP(new_clp->lc_verf, clp->lc_verf, NFSX_VERF)) { 346 /* 347 * If the verifier has changed, the client has rebooted 348 * and a new client id is issued. The old state info 349 * can be thrown away once the SETCLIENTID_CONFIRM occurs. 350 */ 351 LIST_REMOVE(clp, lc_hash); 352 new_clp->lc_flags |= LCL_NEEDSCONFIRM; 353 if ((nd->nd_flag & ND_NFSV41) != 0) 354 new_clp->lc_confirm.lval[0] = confirmp->lval[0] = 355 ++confirm_index; 356 else 357 confirmp->qval = new_clp->lc_confirm.qval = 358 ++confirm_index; 359 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 360 nfsrvboottime; 361 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 362 nfsrv_nextclientindex(); 363 new_clp->lc_stateindex = 0; 364 new_clp->lc_statemaxindex = 0; 365 new_clp->lc_cbref = 0; 366 new_clp->lc_expiry = nfsrv_leaseexpiry(); 367 368 /* 369 * Save the state until confirmed. 370 */ 371 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 372 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 373 tstp->ls_clp = new_clp; 374 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 375 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 376 tstp->ls_clp = new_clp; 377 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, 378 ls_list); 379 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 380 tstp->ls_clp = new_clp; 381 for (i = 0; i < nfsrv_statehashsize; i++) { 382 LIST_NEWHEAD(&new_clp->lc_stateid[i], 383 &clp->lc_stateid[i], ls_hash); 384 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 385 tstp->ls_clp = new_clp; 386 } 387 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 388 lc_hash); 389 newnfsstats.srvclients++; 390 nfsrv_openpluslock++; 391 nfsrv_clients++; 392 NFSLOCKV4ROOTMUTEX(); 393 nfsv4_unlock(&nfsv4rootfs_lock, 1); 394 NFSUNLOCKV4ROOTMUTEX(); 395 396 /* 397 * Must wait until any outstanding callback on the old clp 398 * completes. 399 */ 400 NFSLOCKSTATE(); 401 while (clp->lc_cbref) { 402 clp->lc_flags |= LCL_WAKEUPWANTED; 403 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 404 "nfsd clp", 10 * hz); 405 } 406 NFSUNLOCKSTATE(); 407 nfsrv_zapclient(clp, p); 408 *new_clpp = NULL; 409 goto out; 410 } 411 412 /* For NFSv4.1, mark that we found a confirmed clientid. */ 413 if ((nd->nd_flag & ND_NFSV41) != 0) { 414 clientidp->lval[0] = clp->lc_clientid.lval[0]; 415 clientidp->lval[1] = clp->lc_clientid.lval[1]; 416 confirmp->lval[0] = 0; /* Ignored by client */ 417 confirmp->lval[1] = 1; 418 } else { 419 /* 420 * id and verifier match, so update the net address info 421 * and get rid of any existing callback authentication 422 * handle, so a new one will be acquired. 423 */ 424 LIST_REMOVE(clp, lc_hash); 425 new_clp->lc_flags |= (LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 426 new_clp->lc_expiry = nfsrv_leaseexpiry(); 427 confirmp->qval = new_clp->lc_confirm.qval = ++confirm_index; 428 clientidp->lval[0] = new_clp->lc_clientid.lval[0] = 429 clp->lc_clientid.lval[0]; 430 clientidp->lval[1] = new_clp->lc_clientid.lval[1] = 431 clp->lc_clientid.lval[1]; 432 new_clp->lc_delegtime = clp->lc_delegtime; 433 new_clp->lc_stateindex = clp->lc_stateindex; 434 new_clp->lc_statemaxindex = clp->lc_statemaxindex; 435 new_clp->lc_cbref = 0; 436 LIST_NEWHEAD(&new_clp->lc_open, &clp->lc_open, ls_list); 437 LIST_FOREACH(tstp, &new_clp->lc_open, ls_list) 438 tstp->ls_clp = new_clp; 439 LIST_NEWHEAD(&new_clp->lc_deleg, &clp->lc_deleg, ls_list); 440 LIST_FOREACH(tstp, &new_clp->lc_deleg, ls_list) 441 tstp->ls_clp = new_clp; 442 LIST_NEWHEAD(&new_clp->lc_olddeleg, &clp->lc_olddeleg, ls_list); 443 LIST_FOREACH(tstp, &new_clp->lc_olddeleg, ls_list) 444 tstp->ls_clp = new_clp; 445 for (i = 0; i < nfsrv_statehashsize; i++) { 446 LIST_NEWHEAD(&new_clp->lc_stateid[i], 447 &clp->lc_stateid[i], ls_hash); 448 LIST_FOREACH(tstp, &new_clp->lc_stateid[i], ls_hash) 449 tstp->ls_clp = new_clp; 450 } 451 LIST_INSERT_HEAD(NFSCLIENTHASH(new_clp->lc_clientid), new_clp, 452 lc_hash); 453 newnfsstats.srvclients++; 454 nfsrv_openpluslock++; 455 nfsrv_clients++; 456 } 457 NFSLOCKV4ROOTMUTEX(); 458 nfsv4_unlock(&nfsv4rootfs_lock, 1); 459 NFSUNLOCKV4ROOTMUTEX(); 460 461 if ((nd->nd_flag & ND_NFSV41) == 0) { 462 /* 463 * Must wait until any outstanding callback on the old clp 464 * completes. 465 */ 466 NFSLOCKSTATE(); 467 while (clp->lc_cbref) { 468 clp->lc_flags |= LCL_WAKEUPWANTED; 469 (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, 470 "nfsdclp", 10 * hz); 471 } 472 NFSUNLOCKSTATE(); 473 nfsrv_zapclient(clp, p); 474 *new_clpp = NULL; 475 } 476 477out: 478 NFSEXITCODE2(error, nd); 479 return (error); 480} 481 482/* 483 * Check to see if the client id exists and optionally confirm it. 484 */ 485APPLESTATIC int 486nfsrv_getclient(nfsquad_t clientid, int opflags, struct nfsclient **clpp, 487 struct nfsdsession *nsep, nfsquad_t confirm, uint32_t cbprogram, 488 struct nfsrv_descript *nd, NFSPROC_T *p) 489{ 490 struct nfsclient *clp; 491 struct nfsstate *stp; 492 int i; 493 struct nfsclienthashhead *hp; 494 int error = 0, igotlock, doneok; 495 struct nfssessionhash *shp; 496 struct nfsdsession *sep; 497 uint64_t sessid[2]; 498 static uint64_t next_sess = 0; 499 500 if (clpp) 501 *clpp = NULL; 502 if ((nd == NULL || (nd->nd_flag & ND_NFSV41) == 0 || 503 opflags != CLOPS_RENEW) && nfsrvboottime != clientid.lval[0]) { 504 error = NFSERR_STALECLIENTID; 505 goto out; 506 } 507 508 /* 509 * If called with opflags == CLOPS_RENEW, the State Lock is 510 * already held. Otherwise, we need to get either that or, 511 * for the case of Confirm, lock out the nfsd threads. 512 */ 513 if (opflags & CLOPS_CONFIRM) { 514 NFSLOCKV4ROOTMUTEX(); 515 nfsv4_relref(&nfsv4rootfs_lock); 516 do { 517 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 518 NFSV4ROOTLOCKMUTEXPTR, NULL); 519 } while (!igotlock); 520 /* 521 * Create a new sessionid here, since we need to do it where 522 * there is a mutex held to serialize update of next_sess. 523 */ 524 if ((nd->nd_flag & ND_NFSV41) != 0) { 525 sessid[0] = ++next_sess; 526 sessid[1] = clientid.qval; 527 } 528 NFSUNLOCKV4ROOTMUTEX(); 529 } else if (opflags != CLOPS_RENEW) { 530 NFSLOCKSTATE(); 531 } 532 533 /* For NFSv4.1, the clp is acquired from the associated session. */ 534 if (nd != NULL && (nd->nd_flag & ND_NFSV41) != 0 && 535 opflags == CLOPS_RENEW) { 536 clp = NULL; 537 if ((nd->nd_flag & ND_HASSEQUENCE) != 0) { 538 shp = NFSSESSIONHASH(nd->nd_sessionid); 539 NFSLOCKSESSION(shp); 540 sep = nfsrv_findsession(nd->nd_sessionid); 541 if (sep != NULL) 542 clp = sep->sess_clp; 543 NFSUNLOCKSESSION(shp); 544 } 545 } else { 546 hp = NFSCLIENTHASH(clientid); 547 LIST_FOREACH(clp, hp, lc_hash) { 548 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 549 break; 550 } 551 } 552 if (clp == NULL) { 553 if (opflags & CLOPS_CONFIRM) 554 error = NFSERR_STALECLIENTID; 555 else 556 error = NFSERR_EXPIRED; 557 } else if (clp->lc_flags & LCL_ADMINREVOKED) { 558 /* 559 * If marked admin revoked, just return the error. 560 */ 561 error = NFSERR_ADMINREVOKED; 562 } 563 if (error) { 564 if (opflags & CLOPS_CONFIRM) { 565 NFSLOCKV4ROOTMUTEX(); 566 nfsv4_unlock(&nfsv4rootfs_lock, 1); 567 NFSUNLOCKV4ROOTMUTEX(); 568 } else if (opflags != CLOPS_RENEW) { 569 NFSUNLOCKSTATE(); 570 } 571 goto out; 572 } 573 574 /* 575 * Perform any operations specified by the opflags. 576 */ 577 if (opflags & CLOPS_CONFIRM) { 578 if (((nd->nd_flag & ND_NFSV41) != 0 && 579 clp->lc_confirm.lval[0] != confirm.lval[0]) || 580 ((nd->nd_flag & ND_NFSV41) == 0 && 581 clp->lc_confirm.qval != confirm.qval)) 582 error = NFSERR_STALECLIENTID; 583 else if (nfsrv_notsamecredname(nd, clp)) 584 error = NFSERR_CLIDINUSE; 585 586 if (!error) { 587 if ((clp->lc_flags & (LCL_NEEDSCONFIRM | LCL_DONTCLEAN)) == 588 LCL_NEEDSCONFIRM) { 589 /* 590 * Hang onto the delegations (as old delegations) 591 * for an Open with CLAIM_DELEGATE_PREV unless in 592 * grace, but get rid of the rest of the state. 593 */ 594 nfsrv_cleanclient(clp, p); 595 nfsrv_freedeleglist(&clp->lc_olddeleg); 596 if (nfsrv_checkgrace(nd, clp, 0)) { 597 /* In grace, so just delete delegations */ 598 nfsrv_freedeleglist(&clp->lc_deleg); 599 } else { 600 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) 601 stp->ls_flags |= NFSLCK_OLDDELEG; 602 clp->lc_delegtime = NFSD_MONOSEC + 603 nfsrv_lease + NFSRV_LEASEDELTA; 604 LIST_NEWHEAD(&clp->lc_olddeleg, &clp->lc_deleg, 605 ls_list); 606 } 607 if ((nd->nd_flag & ND_NFSV41) != 0) 608 clp->lc_program = cbprogram; 609 } 610 clp->lc_flags &= ~(LCL_NEEDSCONFIRM | LCL_DONTCLEAN); 611 if (clp->lc_program) 612 clp->lc_flags |= LCL_NEEDSCBNULL; 613 /* For NFSv4.1, link the session onto the client. */ 614 if (nsep != NULL) { 615 /* Hold a reference on the xprt for a backchannel. */ 616 if ((nsep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) 617 != 0 && clp->lc_req.nr_client == NULL) { 618 clp->lc_req.nr_client = (struct __rpc_client *) 619 clnt_bck_create(nd->nd_xprt->xp_socket, 620 cbprogram, NFSV4_CBVERS); 621 if (clp->lc_req.nr_client != NULL) { 622 SVC_ACQUIRE(nd->nd_xprt); 623 nd->nd_xprt->xp_p2 = 624 clp->lc_req.nr_client->cl_private; 625 /* Disable idle timeout. */ 626 nd->nd_xprt->xp_idletimeout = 0; 627 nsep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 628 } else 629 nsep->sess_crflags &= ~NFSV4CRSESS_CONNBACKCHAN; 630 } 631 NFSBCOPY(sessid, nsep->sess_sessionid, 632 NFSX_V4SESSIONID); 633 NFSBCOPY(sessid, nsep->sess_cbsess.nfsess_sessionid, 634 NFSX_V4SESSIONID); 635 shp = NFSSESSIONHASH(nsep->sess_sessionid); 636 NFSLOCKSTATE(); 637 NFSLOCKSESSION(shp); 638 LIST_INSERT_HEAD(&shp->list, nsep, sess_hash); 639 LIST_INSERT_HEAD(&clp->lc_session, nsep, sess_list); 640 nsep->sess_clp = clp; 641 NFSUNLOCKSESSION(shp); 642 NFSUNLOCKSTATE(); 643 } 644 } 645 } else if (clp->lc_flags & LCL_NEEDSCONFIRM) { 646 error = NFSERR_EXPIRED; 647 } 648 649 /* 650 * If called by the Renew Op, we must check the principal. 651 */ 652 if (!error && (opflags & CLOPS_RENEWOP)) { 653 if (nfsrv_notsamecredname(nd, clp)) { 654 doneok = 0; 655 for (i = 0; i < nfsrv_statehashsize && doneok == 0; i++) { 656 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 657 if ((stp->ls_flags & NFSLCK_OPEN) && 658 stp->ls_uid == nd->nd_cred->cr_uid) { 659 doneok = 1; 660 break; 661 } 662 } 663 } 664 if (!doneok) 665 error = NFSERR_ACCES; 666 } 667 if (!error && (clp->lc_flags & LCL_CBDOWN)) 668 error = NFSERR_CBPATHDOWN; 669 } 670 if ((!error || error == NFSERR_CBPATHDOWN) && 671 (opflags & CLOPS_RENEW)) { 672 clp->lc_expiry = nfsrv_leaseexpiry(); 673 } 674 if (opflags & CLOPS_CONFIRM) { 675 NFSLOCKV4ROOTMUTEX(); 676 nfsv4_unlock(&nfsv4rootfs_lock, 1); 677 NFSUNLOCKV4ROOTMUTEX(); 678 } else if (opflags != CLOPS_RENEW) { 679 NFSUNLOCKSTATE(); 680 } 681 if (clpp) 682 *clpp = clp; 683 684out: 685 NFSEXITCODE2(error, nd); 686 return (error); 687} 688 689/* 690 * Perform the NFSv4.1 destroy clientid. 691 */ 692int 693nfsrv_destroyclient(nfsquad_t clientid, NFSPROC_T *p) 694{ 695 struct nfsclient *clp; 696 struct nfsclienthashhead *hp; 697 int error = 0, i, igotlock; 698 699 if (nfsrvboottime != clientid.lval[0]) { 700 error = NFSERR_STALECLIENTID; 701 goto out; 702 } 703 704 /* Lock out other nfsd threads */ 705 NFSLOCKV4ROOTMUTEX(); 706 nfsv4_relref(&nfsv4rootfs_lock); 707 do { 708 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 709 NFSV4ROOTLOCKMUTEXPTR, NULL); 710 } while (igotlock == 0); 711 NFSUNLOCKV4ROOTMUTEX(); 712 713 hp = NFSCLIENTHASH(clientid); 714 LIST_FOREACH(clp, hp, lc_hash) { 715 if (clp->lc_clientid.lval[1] == clientid.lval[1]) 716 break; 717 } 718 if (clp == NULL) { 719 NFSLOCKV4ROOTMUTEX(); 720 nfsv4_unlock(&nfsv4rootfs_lock, 1); 721 NFSUNLOCKV4ROOTMUTEX(); 722 /* Just return ok, since it is gone. */ 723 goto out; 724 } 725 726 /* Scan for state on the clientid. */ 727 for (i = 0; i < nfsrv_statehashsize; i++) 728 if (!LIST_EMPTY(&clp->lc_stateid[i])) { 729 NFSLOCKV4ROOTMUTEX(); 730 nfsv4_unlock(&nfsv4rootfs_lock, 1); 731 NFSUNLOCKV4ROOTMUTEX(); 732 error = NFSERR_CLIENTIDBUSY; 733 goto out; 734 } 735 if (!LIST_EMPTY(&clp->lc_session) || !LIST_EMPTY(&clp->lc_deleg)) { 736 NFSLOCKV4ROOTMUTEX(); 737 nfsv4_unlock(&nfsv4rootfs_lock, 1); 738 NFSUNLOCKV4ROOTMUTEX(); 739 error = NFSERR_CLIENTIDBUSY; 740 goto out; 741 } 742 743 /* Destroy the clientid and return ok. */ 744 nfsrv_cleanclient(clp, p); 745 nfsrv_freedeleglist(&clp->lc_deleg); 746 nfsrv_freedeleglist(&clp->lc_olddeleg); 747 LIST_REMOVE(clp, lc_hash); 748 NFSLOCKV4ROOTMUTEX(); 749 nfsv4_unlock(&nfsv4rootfs_lock, 1); 750 NFSUNLOCKV4ROOTMUTEX(); 751 nfsrv_zapclient(clp, p); 752out: 753 NFSEXITCODE2(error, nd); 754 return (error); 755} 756 757/* 758 * Called from the new nfssvc syscall to admin revoke a clientid. 759 * Returns 0 for success, error otherwise. 760 */ 761APPLESTATIC int 762nfsrv_adminrevoke(struct nfsd_clid *revokep, NFSPROC_T *p) 763{ 764 struct nfsclient *clp = NULL; 765 int i, error = 0; 766 int gotit, igotlock; 767 768 /* 769 * First, lock out the nfsd so that state won't change while the 770 * revocation record is being written to the stable storage restart 771 * file. 772 */ 773 NFSLOCKV4ROOTMUTEX(); 774 do { 775 igotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 776 NFSV4ROOTLOCKMUTEXPTR, NULL); 777 } while (!igotlock); 778 NFSUNLOCKV4ROOTMUTEX(); 779 780 /* 781 * Search for a match in the client list. 782 */ 783 gotit = i = 0; 784 while (i < nfsrv_clienthashsize && !gotit) { 785 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 786 if (revokep->nclid_idlen == clp->lc_idlen && 787 !NFSBCMP(revokep->nclid_id, clp->lc_id, clp->lc_idlen)) { 788 gotit = 1; 789 break; 790 } 791 } 792 i++; 793 } 794 if (!gotit) { 795 NFSLOCKV4ROOTMUTEX(); 796 nfsv4_unlock(&nfsv4rootfs_lock, 0); 797 NFSUNLOCKV4ROOTMUTEX(); 798 error = EPERM; 799 goto out; 800 } 801 802 /* 803 * Now, write out the revocation record 804 */ 805 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 806 nfsrv_backupstable(); 807 808 /* 809 * and clear out the state, marking the clientid revoked. 810 */ 811 clp->lc_flags &= ~LCL_CALLBACKSON; 812 clp->lc_flags |= LCL_ADMINREVOKED; 813 nfsrv_cleanclient(clp, p); 814 nfsrv_freedeleglist(&clp->lc_deleg); 815 nfsrv_freedeleglist(&clp->lc_olddeleg); 816 NFSLOCKV4ROOTMUTEX(); 817 nfsv4_unlock(&nfsv4rootfs_lock, 0); 818 NFSUNLOCKV4ROOTMUTEX(); 819 820out: 821 NFSEXITCODE(error); 822 return (error); 823} 824 825/* 826 * Dump out stats for all clients. Called from nfssvc(2), that is used 827 * newnfsstats. 828 */ 829APPLESTATIC void 830nfsrv_dumpclients(struct nfsd_dumpclients *dumpp, int maxcnt) 831{ 832 struct nfsclient *clp; 833 int i = 0, cnt = 0; 834 835 /* 836 * First, get a reference on the nfsv4rootfs_lock so that an 837 * exclusive lock cannot be acquired while dumping the clients. 838 */ 839 NFSLOCKV4ROOTMUTEX(); 840 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 841 NFSUNLOCKV4ROOTMUTEX(); 842 NFSLOCKSTATE(); 843 /* 844 * Rattle through the client lists until done. 845 */ 846 while (i < nfsrv_clienthashsize && cnt < maxcnt) { 847 clp = LIST_FIRST(&nfsclienthash[i]); 848 while (clp != LIST_END(&nfsclienthash[i]) && cnt < maxcnt) { 849 nfsrv_dumpaclient(clp, &dumpp[cnt]); 850 cnt++; 851 clp = LIST_NEXT(clp, lc_hash); 852 } 853 i++; 854 } 855 if (cnt < maxcnt) 856 dumpp[cnt].ndcl_clid.nclid_idlen = 0; 857 NFSUNLOCKSTATE(); 858 NFSLOCKV4ROOTMUTEX(); 859 nfsv4_relref(&nfsv4rootfs_lock); 860 NFSUNLOCKV4ROOTMUTEX(); 861} 862 863/* 864 * Dump stats for a client. Must be called with the NFSSTATELOCK and spl'd. 865 */ 866static void 867nfsrv_dumpaclient(struct nfsclient *clp, struct nfsd_dumpclients *dumpp) 868{ 869 struct nfsstate *stp, *openstp, *lckownstp; 870 struct nfslock *lop; 871 struct sockaddr *sad; 872 struct sockaddr_in *rad; 873 struct sockaddr_in6 *rad6; 874 875 dumpp->ndcl_nopenowners = dumpp->ndcl_nlockowners = 0; 876 dumpp->ndcl_nopens = dumpp->ndcl_nlocks = 0; 877 dumpp->ndcl_ndelegs = dumpp->ndcl_nolddelegs = 0; 878 dumpp->ndcl_flags = clp->lc_flags; 879 dumpp->ndcl_clid.nclid_idlen = clp->lc_idlen; 880 NFSBCOPY(clp->lc_id, dumpp->ndcl_clid.nclid_id, clp->lc_idlen); 881 sad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr *); 882 dumpp->ndcl_addrfam = sad->sa_family; 883 if (sad->sa_family == AF_INET) { 884 rad = (struct sockaddr_in *)sad; 885 dumpp->ndcl_cbaddr.sin_addr = rad->sin_addr; 886 } else { 887 rad6 = (struct sockaddr_in6 *)sad; 888 dumpp->ndcl_cbaddr.sin6_addr = rad6->sin6_addr; 889 } 890 891 /* 892 * Now, scan the state lists and total up the opens and locks. 893 */ 894 LIST_FOREACH(stp, &clp->lc_open, ls_list) { 895 dumpp->ndcl_nopenowners++; 896 LIST_FOREACH(openstp, &stp->ls_open, ls_list) { 897 dumpp->ndcl_nopens++; 898 LIST_FOREACH(lckownstp, &openstp->ls_open, ls_list) { 899 dumpp->ndcl_nlockowners++; 900 LIST_FOREACH(lop, &lckownstp->ls_lock, lo_lckowner) { 901 dumpp->ndcl_nlocks++; 902 } 903 } 904 } 905 } 906 907 /* 908 * and the delegation lists. 909 */ 910 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 911 dumpp->ndcl_ndelegs++; 912 } 913 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 914 dumpp->ndcl_nolddelegs++; 915 } 916} 917 918/* 919 * Dump out lock stats for a file. 920 */ 921APPLESTATIC void 922nfsrv_dumplocks(vnode_t vp, struct nfsd_dumplocks *ldumpp, int maxcnt, 923 NFSPROC_T *p) 924{ 925 struct nfsstate *stp; 926 struct nfslock *lop; 927 int cnt = 0; 928 struct nfslockfile *lfp; 929 struct sockaddr *sad; 930 struct sockaddr_in *rad; 931 struct sockaddr_in6 *rad6; 932 int ret; 933 fhandle_t nfh; 934 935 ret = nfsrv_getlockfh(vp, 0, NULL, &nfh, p); 936 /* 937 * First, get a reference on the nfsv4rootfs_lock so that an 938 * exclusive lock on it cannot be acquired while dumping the locks. 939 */ 940 NFSLOCKV4ROOTMUTEX(); 941 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 942 NFSUNLOCKV4ROOTMUTEX(); 943 NFSLOCKSTATE(); 944 if (!ret) 945 ret = nfsrv_getlockfile(0, NULL, &lfp, &nfh, 0); 946 if (ret) { 947 ldumpp[0].ndlck_clid.nclid_idlen = 0; 948 NFSUNLOCKSTATE(); 949 NFSLOCKV4ROOTMUTEX(); 950 nfsv4_relref(&nfsv4rootfs_lock); 951 NFSUNLOCKV4ROOTMUTEX(); 952 return; 953 } 954 955 /* 956 * For each open share on file, dump it out. 957 */ 958 stp = LIST_FIRST(&lfp->lf_open); 959 while (stp != LIST_END(&lfp->lf_open) && cnt < maxcnt) { 960 ldumpp[cnt].ndlck_flags = stp->ls_flags; 961 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 962 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 963 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 964 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 965 ldumpp[cnt].ndlck_owner.nclid_idlen = 966 stp->ls_openowner->ls_ownerlen; 967 NFSBCOPY(stp->ls_openowner->ls_owner, 968 ldumpp[cnt].ndlck_owner.nclid_id, 969 stp->ls_openowner->ls_ownerlen); 970 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 971 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 972 stp->ls_clp->lc_idlen); 973 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 974 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 975 if (sad->sa_family == AF_INET) { 976 rad = (struct sockaddr_in *)sad; 977 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 978 } else { 979 rad6 = (struct sockaddr_in6 *)sad; 980 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 981 } 982 stp = LIST_NEXT(stp, ls_file); 983 cnt++; 984 } 985 986 /* 987 * and all locks. 988 */ 989 lop = LIST_FIRST(&lfp->lf_lock); 990 while (lop != LIST_END(&lfp->lf_lock) && cnt < maxcnt) { 991 stp = lop->lo_stp; 992 ldumpp[cnt].ndlck_flags = lop->lo_flags; 993 ldumpp[cnt].ndlck_first = lop->lo_first; 994 ldumpp[cnt].ndlck_end = lop->lo_end; 995 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 996 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 997 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 998 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 999 ldumpp[cnt].ndlck_owner.nclid_idlen = stp->ls_ownerlen; 1000 NFSBCOPY(stp->ls_owner, ldumpp[cnt].ndlck_owner.nclid_id, 1001 stp->ls_ownerlen); 1002 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1003 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1004 stp->ls_clp->lc_idlen); 1005 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 1006 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 1007 if (sad->sa_family == AF_INET) { 1008 rad = (struct sockaddr_in *)sad; 1009 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 1010 } else { 1011 rad6 = (struct sockaddr_in6 *)sad; 1012 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 1013 } 1014 lop = LIST_NEXT(lop, lo_lckfile); 1015 cnt++; 1016 } 1017 1018 /* 1019 * and the delegations. 1020 */ 1021 stp = LIST_FIRST(&lfp->lf_deleg); 1022 while (stp != LIST_END(&lfp->lf_deleg) && cnt < maxcnt) { 1023 ldumpp[cnt].ndlck_flags = stp->ls_flags; 1024 ldumpp[cnt].ndlck_stateid.seqid = stp->ls_stateid.seqid; 1025 ldumpp[cnt].ndlck_stateid.other[0] = stp->ls_stateid.other[0]; 1026 ldumpp[cnt].ndlck_stateid.other[1] = stp->ls_stateid.other[1]; 1027 ldumpp[cnt].ndlck_stateid.other[2] = stp->ls_stateid.other[2]; 1028 ldumpp[cnt].ndlck_owner.nclid_idlen = 0; 1029 ldumpp[cnt].ndlck_clid.nclid_idlen = stp->ls_clp->lc_idlen; 1030 NFSBCOPY(stp->ls_clp->lc_id, ldumpp[cnt].ndlck_clid.nclid_id, 1031 stp->ls_clp->lc_idlen); 1032 sad=NFSSOCKADDR(stp->ls_clp->lc_req.nr_nam, struct sockaddr *); 1033 ldumpp[cnt].ndlck_addrfam = sad->sa_family; 1034 if (sad->sa_family == AF_INET) { 1035 rad = (struct sockaddr_in *)sad; 1036 ldumpp[cnt].ndlck_cbaddr.sin_addr = rad->sin_addr; 1037 } else { 1038 rad6 = (struct sockaddr_in6 *)sad; 1039 ldumpp[cnt].ndlck_cbaddr.sin6_addr = rad6->sin6_addr; 1040 } 1041 stp = LIST_NEXT(stp, ls_file); 1042 cnt++; 1043 } 1044 1045 /* 1046 * If list isn't full, mark end of list by setting the client name 1047 * to zero length. 1048 */ 1049 if (cnt < maxcnt) 1050 ldumpp[cnt].ndlck_clid.nclid_idlen = 0; 1051 NFSUNLOCKSTATE(); 1052 NFSLOCKV4ROOTMUTEX(); 1053 nfsv4_relref(&nfsv4rootfs_lock); 1054 NFSUNLOCKV4ROOTMUTEX(); 1055} 1056 1057/* 1058 * Server timer routine. It can scan any linked list, so long 1059 * as it holds the spin/mutex lock and there is no exclusive lock on 1060 * nfsv4rootfs_lock. 1061 * (For OpenBSD, a kthread is ok. For FreeBSD, I think it is ok 1062 * to do this from a callout, since the spin locks work. For 1063 * Darwin, I'm not sure what will work correctly yet.) 1064 * Should be called once per second. 1065 */ 1066APPLESTATIC void 1067nfsrv_servertimer(void) 1068{ 1069 struct nfsclient *clp, *nclp; 1070 struct nfsstate *stp, *nstp; 1071 int got_ref, i; 1072 1073 /* 1074 * Make sure nfsboottime is set. This is used by V3 as well 1075 * as V4. Note that nfsboottime is not nfsrvboottime, which is 1076 * only used by the V4 server for leases. 1077 */ 1078 if (nfsboottime.tv_sec == 0) 1079 NFSSETBOOTTIME(nfsboottime); 1080 1081 /* 1082 * If server hasn't started yet, just return. 1083 */ 1084 NFSLOCKSTATE(); 1085 if (nfsrv_stablefirst.nsf_eograce == 0) { 1086 NFSUNLOCKSTATE(); 1087 return; 1088 } 1089 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) { 1090 if (!(nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) && 1091 NFSD_MONOSEC > nfsrv_stablefirst.nsf_eograce) 1092 nfsrv_stablefirst.nsf_flags |= 1093 (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 1094 NFSUNLOCKSTATE(); 1095 return; 1096 } 1097 1098 /* 1099 * Try and get a reference count on the nfsv4rootfs_lock so that 1100 * no nfsd thread can acquire an exclusive lock on it before this 1101 * call is done. If it is already exclusively locked, just return. 1102 */ 1103 NFSLOCKV4ROOTMUTEX(); 1104 got_ref = nfsv4_getref_nonblock(&nfsv4rootfs_lock); 1105 NFSUNLOCKV4ROOTMUTEX(); 1106 if (got_ref == 0) { 1107 NFSUNLOCKSTATE(); 1108 return; 1109 } 1110 1111 /* 1112 * For each client... 1113 */ 1114 for (i = 0; i < nfsrv_clienthashsize; i++) { 1115 clp = LIST_FIRST(&nfsclienthash[i]); 1116 while (clp != LIST_END(&nfsclienthash[i])) { 1117 nclp = LIST_NEXT(clp, lc_hash); 1118 if (!(clp->lc_flags & LCL_EXPIREIT)) { 1119 if (((clp->lc_expiry + NFSRV_STALELEASE) < NFSD_MONOSEC 1120 && ((LIST_EMPTY(&clp->lc_deleg) 1121 && LIST_EMPTY(&clp->lc_open)) || 1122 nfsrv_clients > nfsrv_clienthighwater)) || 1123 (clp->lc_expiry + NFSRV_MOULDYLEASE) < NFSD_MONOSEC || 1124 (clp->lc_expiry < NFSD_MONOSEC && 1125 (nfsrv_openpluslock * 10 / 9) > nfsrv_v4statelimit)) { 1126 /* 1127 * Lease has expired several nfsrv_lease times ago: 1128 * PLUS 1129 * - no state is associated with it 1130 * OR 1131 * - above high water mark for number of clients 1132 * (nfsrv_clienthighwater should be large enough 1133 * that this only occurs when clients fail to 1134 * use the same nfs_client_id4.id. Maybe somewhat 1135 * higher that the maximum number of clients that 1136 * will mount this server?) 1137 * OR 1138 * Lease has expired a very long time ago 1139 * OR 1140 * Lease has expired PLUS the number of opens + locks 1141 * has exceeded 90% of capacity 1142 * 1143 * --> Mark for expiry. The actual expiry will be done 1144 * by an nfsd sometime soon. 1145 */ 1146 clp->lc_flags |= LCL_EXPIREIT; 1147 nfsrv_stablefirst.nsf_flags |= 1148 (NFSNSF_NEEDLOCK | NFSNSF_EXPIREDCLIENT); 1149 } else { 1150 /* 1151 * If there are no opens, increment no open tick cnt 1152 * If time exceeds NFSNOOPEN, mark it to be thrown away 1153 * otherwise, if there is an open, reset no open time 1154 * Hopefully, this will avoid excessive re-creation 1155 * of open owners and subsequent open confirms. 1156 */ 1157 stp = LIST_FIRST(&clp->lc_open); 1158 while (stp != LIST_END(&clp->lc_open)) { 1159 nstp = LIST_NEXT(stp, ls_list); 1160 if (LIST_EMPTY(&stp->ls_open)) { 1161 stp->ls_noopens++; 1162 if (stp->ls_noopens > NFSNOOPEN || 1163 (nfsrv_openpluslock * 2) > 1164 nfsrv_v4statelimit) 1165 nfsrv_stablefirst.nsf_flags |= 1166 NFSNSF_NOOPENS; 1167 } else { 1168 stp->ls_noopens = 0; 1169 } 1170 stp = nstp; 1171 } 1172 } 1173 } 1174 clp = nclp; 1175 } 1176 } 1177 NFSUNLOCKSTATE(); 1178 NFSLOCKV4ROOTMUTEX(); 1179 nfsv4_relref(&nfsv4rootfs_lock); 1180 NFSUNLOCKV4ROOTMUTEX(); 1181} 1182 1183/* 1184 * The following set of functions free up the various data structures. 1185 */ 1186/* 1187 * Clear out all open/lock state related to this nfsclient. 1188 * Caller must hold an exclusive lock on nfsv4rootfs_lock, so that 1189 * there are no other active nfsd threads. 1190 */ 1191APPLESTATIC void 1192nfsrv_cleanclient(struct nfsclient *clp, NFSPROC_T *p) 1193{ 1194 struct nfsstate *stp, *nstp; 1195 struct nfsdsession *sep, *nsep; 1196 1197 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) 1198 nfsrv_freeopenowner(stp, 1, p); 1199 if ((clp->lc_flags & LCL_ADMINREVOKED) == 0) 1200 LIST_FOREACH_SAFE(sep, &clp->lc_session, sess_list, nsep) 1201 (void)nfsrv_freesession(sep, NULL); 1202} 1203 1204/* 1205 * Free a client that has been cleaned. It should also already have been 1206 * removed from the lists. 1207 * (Just to be safe w.r.t. newnfs_disconnect(), call this function when 1208 * softclock interrupts are enabled.) 1209 */ 1210APPLESTATIC void 1211nfsrv_zapclient(struct nfsclient *clp, NFSPROC_T *p) 1212{ 1213 1214#ifdef notyet 1215 if ((clp->lc_flags & (LCL_GSS | LCL_CALLBACKSON)) == 1216 (LCL_GSS | LCL_CALLBACKSON) && 1217 (clp->lc_hand.nfsh_flag & NFSG_COMPLETE) && 1218 clp->lc_handlelen > 0) { 1219 clp->lc_hand.nfsh_flag &= ~NFSG_COMPLETE; 1220 clp->lc_hand.nfsh_flag |= NFSG_DESTROYED; 1221 (void) nfsrv_docallback(clp, NFSV4PROC_CBNULL, 1222 NULL, 0, NULL, NULL, NULL, p); 1223 } 1224#endif 1225 newnfs_disconnect(&clp->lc_req); 1226 NFSSOCKADDRFREE(clp->lc_req.nr_nam); 1227 NFSFREEMUTEX(&clp->lc_req.nr_mtx); 1228 free(clp->lc_stateid, M_NFSDCLIENT); 1229 free(clp, M_NFSDCLIENT); 1230 NFSLOCKSTATE(); 1231 newnfsstats.srvclients--; 1232 nfsrv_openpluslock--; 1233 nfsrv_clients--; 1234 NFSUNLOCKSTATE(); 1235} 1236 1237/* 1238 * Free a list of delegation state structures. 1239 * (This function will also free all nfslockfile structures that no 1240 * longer have associated state.) 1241 */ 1242APPLESTATIC void 1243nfsrv_freedeleglist(struct nfsstatehead *sthp) 1244{ 1245 struct nfsstate *stp, *nstp; 1246 1247 LIST_FOREACH_SAFE(stp, sthp, ls_list, nstp) { 1248 nfsrv_freedeleg(stp); 1249 } 1250 LIST_INIT(sthp); 1251} 1252 1253/* 1254 * Free up a delegation. 1255 */ 1256static void 1257nfsrv_freedeleg(struct nfsstate *stp) 1258{ 1259 struct nfslockfile *lfp; 1260 1261 LIST_REMOVE(stp, ls_hash); 1262 LIST_REMOVE(stp, ls_list); 1263 LIST_REMOVE(stp, ls_file); 1264 lfp = stp->ls_lfp; 1265 if (LIST_EMPTY(&lfp->lf_open) && 1266 LIST_EMPTY(&lfp->lf_lock) && LIST_EMPTY(&lfp->lf_deleg) && 1267 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1268 lfp->lf_usecount == 0 && 1269 nfsv4_testlock(&lfp->lf_locallock_lck) == 0) 1270 nfsrv_freenfslockfile(lfp); 1271 FREE((caddr_t)stp, M_NFSDSTATE); 1272 newnfsstats.srvdelegates--; 1273 nfsrv_openpluslock--; 1274 nfsrv_delegatecnt--; 1275} 1276 1277/* 1278 * This function frees an open owner and all associated opens. 1279 */ 1280static void 1281nfsrv_freeopenowner(struct nfsstate *stp, int cansleep, NFSPROC_T *p) 1282{ 1283 struct nfsstate *nstp, *tstp; 1284 1285 LIST_REMOVE(stp, ls_list); 1286 /* 1287 * Now, free all associated opens. 1288 */ 1289 nstp = LIST_FIRST(&stp->ls_open); 1290 while (nstp != LIST_END(&stp->ls_open)) { 1291 tstp = nstp; 1292 nstp = LIST_NEXT(nstp, ls_list); 1293 (void) nfsrv_freeopen(tstp, NULL, cansleep, p); 1294 } 1295 if (stp->ls_op) 1296 nfsrvd_derefcache(stp->ls_op); 1297 FREE((caddr_t)stp, M_NFSDSTATE); 1298 newnfsstats.srvopenowners--; 1299 nfsrv_openpluslock--; 1300} 1301 1302/* 1303 * This function frees an open (nfsstate open structure) with all associated 1304 * lock_owners and locks. It also frees the nfslockfile structure iff there 1305 * are no other opens on the file. 1306 * Returns 1 if it free'd the nfslockfile, 0 otherwise. 1307 */ 1308static int 1309nfsrv_freeopen(struct nfsstate *stp, vnode_t vp, int cansleep, NFSPROC_T *p) 1310{ 1311 struct nfsstate *nstp, *tstp; 1312 struct nfslockfile *lfp; 1313 int ret; 1314 1315 LIST_REMOVE(stp, ls_hash); 1316 LIST_REMOVE(stp, ls_list); 1317 LIST_REMOVE(stp, ls_file); 1318 1319 lfp = stp->ls_lfp; 1320 /* 1321 * Now, free all lockowners associated with this open. 1322 */ 1323 LIST_FOREACH_SAFE(tstp, &stp->ls_open, ls_list, nstp) 1324 nfsrv_freelockowner(tstp, vp, cansleep, p); 1325 1326 /* 1327 * The nfslockfile is freed here if there are no locks 1328 * associated with the open. 1329 * If there are locks associated with the open, the 1330 * nfslockfile structure can be freed via nfsrv_freelockowner(). 1331 * Acquire the state mutex to avoid races with calls to 1332 * nfsrv_getlockfile(). 1333 */ 1334 if (cansleep != 0) 1335 NFSLOCKSTATE(); 1336 if (lfp != NULL && LIST_EMPTY(&lfp->lf_open) && 1337 LIST_EMPTY(&lfp->lf_deleg) && LIST_EMPTY(&lfp->lf_lock) && 1338 LIST_EMPTY(&lfp->lf_locallock) && LIST_EMPTY(&lfp->lf_rollback) && 1339 lfp->lf_usecount == 0 && 1340 (cansleep != 0 || nfsv4_testlock(&lfp->lf_locallock_lck) == 0)) { 1341 nfsrv_freenfslockfile(lfp); 1342 ret = 1; 1343 } else 1344 ret = 0; 1345 if (cansleep != 0) 1346 NFSUNLOCKSTATE(); 1347 FREE((caddr_t)stp, M_NFSDSTATE); 1348 newnfsstats.srvopens--; 1349 nfsrv_openpluslock--; 1350 return (ret); 1351} 1352 1353/* 1354 * Frees a lockowner and all associated locks. 1355 */ 1356static void 1357nfsrv_freelockowner(struct nfsstate *stp, vnode_t vp, int cansleep, 1358 NFSPROC_T *p) 1359{ 1360 1361 LIST_REMOVE(stp, ls_hash); 1362 LIST_REMOVE(stp, ls_list); 1363 nfsrv_freeallnfslocks(stp, vp, cansleep, p); 1364 if (stp->ls_op) 1365 nfsrvd_derefcache(stp->ls_op); 1366 FREE((caddr_t)stp, M_NFSDSTATE); 1367 newnfsstats.srvlockowners--; 1368 nfsrv_openpluslock--; 1369} 1370 1371/* 1372 * Free all the nfs locks on a lockowner. 1373 */ 1374static void 1375nfsrv_freeallnfslocks(struct nfsstate *stp, vnode_t vp, int cansleep, 1376 NFSPROC_T *p) 1377{ 1378 struct nfslock *lop, *nlop; 1379 struct nfsrollback *rlp, *nrlp; 1380 struct nfslockfile *lfp = NULL; 1381 int gottvp = 0; 1382 vnode_t tvp = NULL; 1383 uint64_t first, end; 1384 1385 if (vp != NULL) 1386 ASSERT_VOP_UNLOCKED(vp, "nfsrv_freeallnfslocks: vnode locked"); 1387 lop = LIST_FIRST(&stp->ls_lock); 1388 while (lop != LIST_END(&stp->ls_lock)) { 1389 nlop = LIST_NEXT(lop, lo_lckowner); 1390 /* 1391 * Since all locks should be for the same file, lfp should 1392 * not change. 1393 */ 1394 if (lfp == NULL) 1395 lfp = lop->lo_lfp; 1396 else if (lfp != lop->lo_lfp) 1397 panic("allnfslocks"); 1398 /* 1399 * If vp is NULL and cansleep != 0, a vnode must be acquired 1400 * from the file handle. This only occurs when called from 1401 * nfsrv_cleanclient(). 1402 */ 1403 if (gottvp == 0) { 1404 if (nfsrv_dolocallocks == 0) 1405 tvp = NULL; 1406 else if (vp == NULL && cansleep != 0) { 1407 tvp = nfsvno_getvp(&lfp->lf_fh); 1408 NFSVOPUNLOCK(tvp, 0); 1409 } else 1410 tvp = vp; 1411 gottvp = 1; 1412 } 1413 1414 if (tvp != NULL) { 1415 if (cansleep == 0) 1416 panic("allnfs2"); 1417 first = lop->lo_first; 1418 end = lop->lo_end; 1419 nfsrv_freenfslock(lop); 1420 nfsrv_localunlock(tvp, lfp, first, end, p); 1421 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, 1422 nrlp) 1423 free(rlp, M_NFSDROLLBACK); 1424 LIST_INIT(&lfp->lf_rollback); 1425 } else 1426 nfsrv_freenfslock(lop); 1427 lop = nlop; 1428 } 1429 if (vp == NULL && tvp != NULL) 1430 vrele(tvp); 1431} 1432 1433/* 1434 * Free an nfslock structure. 1435 */ 1436static void 1437nfsrv_freenfslock(struct nfslock *lop) 1438{ 1439 1440 if (lop->lo_lckfile.le_prev != NULL) { 1441 LIST_REMOVE(lop, lo_lckfile); 1442 newnfsstats.srvlocks--; 1443 nfsrv_openpluslock--; 1444 } 1445 LIST_REMOVE(lop, lo_lckowner); 1446 FREE((caddr_t)lop, M_NFSDLOCK); 1447} 1448 1449/* 1450 * This function frees an nfslockfile structure. 1451 */ 1452static void 1453nfsrv_freenfslockfile(struct nfslockfile *lfp) 1454{ 1455 1456 LIST_REMOVE(lfp, lf_hash); 1457 FREE((caddr_t)lfp, M_NFSDLOCKFILE); 1458} 1459 1460/* 1461 * This function looks up an nfsstate structure via stateid. 1462 */ 1463static int 1464nfsrv_getstate(struct nfsclient *clp, nfsv4stateid_t *stateidp, __unused u_int32_t flags, 1465 struct nfsstate **stpp) 1466{ 1467 struct nfsstate *stp; 1468 struct nfsstatehead *hp; 1469 int error = 0; 1470 1471 *stpp = NULL; 1472 hp = NFSSTATEHASH(clp, *stateidp); 1473 LIST_FOREACH(stp, hp, ls_hash) { 1474 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 1475 NFSX_STATEIDOTHER)) 1476 break; 1477 } 1478 1479 /* 1480 * If no state id in list, return NFSERR_BADSTATEID. 1481 */ 1482 if (stp == LIST_END(hp)) { 1483 error = NFSERR_BADSTATEID; 1484 goto out; 1485 } 1486 *stpp = stp; 1487 1488out: 1489 NFSEXITCODE(error); 1490 return (error); 1491} 1492 1493/* 1494 * This function gets an nfsstate structure via owner string. 1495 */ 1496static void 1497nfsrv_getowner(struct nfsstatehead *hp, struct nfsstate *new_stp, 1498 struct nfsstate **stpp) 1499{ 1500 struct nfsstate *stp; 1501 1502 *stpp = NULL; 1503 LIST_FOREACH(stp, hp, ls_list) { 1504 if (new_stp->ls_ownerlen == stp->ls_ownerlen && 1505 !NFSBCMP(new_stp->ls_owner,stp->ls_owner,stp->ls_ownerlen)) { 1506 *stpp = stp; 1507 return; 1508 } 1509 } 1510} 1511 1512/* 1513 * Lock control function called to update lock status. 1514 * Returns 0 upon success, -1 if there is no lock and the flags indicate 1515 * that one isn't to be created and an NFSERR_xxx for other errors. 1516 * The structures new_stp and new_lop are passed in as pointers that should 1517 * be set to NULL if the structure is used and shouldn't be free'd. 1518 * For the NFSLCK_TEST and NFSLCK_CHECK cases, the structures are 1519 * never used and can safely be allocated on the stack. For all other 1520 * cases, *new_stpp and *new_lopp should be malloc'd before the call, 1521 * in case they are used. 1522 */ 1523APPLESTATIC int 1524nfsrv_lockctrl(vnode_t vp, struct nfsstate **new_stpp, 1525 struct nfslock **new_lopp, struct nfslockconflict *cfp, 1526 nfsquad_t clientid, nfsv4stateid_t *stateidp, 1527 __unused struct nfsexstuff *exp, 1528 struct nfsrv_descript *nd, NFSPROC_T *p) 1529{ 1530 struct nfslock *lop; 1531 struct nfsstate *new_stp = *new_stpp; 1532 struct nfslock *new_lop = *new_lopp; 1533 struct nfsstate *tstp, *mystp, *nstp; 1534 int specialid = 0; 1535 struct nfslockfile *lfp; 1536 struct nfslock *other_lop = NULL; 1537 struct nfsstate *stp, *lckstp = NULL; 1538 struct nfsclient *clp = NULL; 1539 u_int32_t bits; 1540 int error = 0, haslock = 0, ret, reterr; 1541 int getlckret, delegation = 0, filestruct_locked, vnode_unlocked = 0; 1542 fhandle_t nfh; 1543 uint64_t first, end; 1544 uint32_t lock_flags; 1545 1546 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1547 /* 1548 * Note the special cases of "all 1s" or "all 0s" stateids and 1549 * let reads with all 1s go ahead. 1550 */ 1551 if (new_stp->ls_stateid.seqid == 0x0 && 1552 new_stp->ls_stateid.other[0] == 0x0 && 1553 new_stp->ls_stateid.other[1] == 0x0 && 1554 new_stp->ls_stateid.other[2] == 0x0) 1555 specialid = 1; 1556 else if (new_stp->ls_stateid.seqid == 0xffffffff && 1557 new_stp->ls_stateid.other[0] == 0xffffffff && 1558 new_stp->ls_stateid.other[1] == 0xffffffff && 1559 new_stp->ls_stateid.other[2] == 0xffffffff) 1560 specialid = 2; 1561 } 1562 1563 /* 1564 * Check for restart conditions (client and server). 1565 */ 1566 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 1567 &new_stp->ls_stateid, specialid); 1568 if (error) 1569 goto out; 1570 1571 /* 1572 * Check for state resource limit exceeded. 1573 */ 1574 if ((new_stp->ls_flags & NFSLCK_LOCK) && 1575 nfsrv_openpluslock > nfsrv_v4statelimit) { 1576 error = NFSERR_RESOURCE; 1577 goto out; 1578 } 1579 1580 /* 1581 * For the lock case, get another nfslock structure, 1582 * just in case we need it. 1583 * Malloc now, before we start sifting through the linked lists, 1584 * in case we have to wait for memory. 1585 */ 1586tryagain: 1587 if (new_stp->ls_flags & NFSLCK_LOCK) 1588 MALLOC(other_lop, struct nfslock *, sizeof (struct nfslock), 1589 M_NFSDLOCK, M_WAITOK); 1590 filestruct_locked = 0; 1591 reterr = 0; 1592 lfp = NULL; 1593 1594 /* 1595 * Get the lockfile structure for CFH now, so we can do a sanity 1596 * check against the stateid, before incrementing the seqid#, since 1597 * we want to return NFSERR_BADSTATEID on failure and the seqid# 1598 * shouldn't be incremented for this case. 1599 * If nfsrv_getlockfile() returns -1, it means "not found", which 1600 * will be handled later. 1601 * If we are doing Lock/LockU and local locking is enabled, sleep 1602 * lock the nfslockfile structure. 1603 */ 1604 getlckret = nfsrv_getlockfh(vp, new_stp->ls_flags, NULL, &nfh, p); 1605 NFSLOCKSTATE(); 1606 if (getlckret == 0) { 1607 if ((new_stp->ls_flags & (NFSLCK_LOCK | NFSLCK_UNLOCK)) != 0 && 1608 nfsrv_dolocallocks != 0 && nd->nd_repstat == 0) { 1609 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1610 &lfp, &nfh, 1); 1611 if (getlckret == 0) 1612 filestruct_locked = 1; 1613 } else 1614 getlckret = nfsrv_getlockfile(new_stp->ls_flags, NULL, 1615 &lfp, &nfh, 0); 1616 } 1617 if (getlckret != 0 && getlckret != -1) 1618 reterr = getlckret; 1619 1620 if (filestruct_locked != 0) { 1621 LIST_INIT(&lfp->lf_rollback); 1622 if ((new_stp->ls_flags & NFSLCK_LOCK)) { 1623 /* 1624 * For local locking, do the advisory locking now, so 1625 * that any conflict can be detected. A failure later 1626 * can be rolled back locally. If an error is returned, 1627 * struct nfslockfile has been unlocked and any local 1628 * locking rolled back. 1629 */ 1630 NFSUNLOCKSTATE(); 1631 if (vnode_unlocked == 0) { 1632 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl1"); 1633 vnode_unlocked = 1; 1634 NFSVOPUNLOCK(vp, 0); 1635 } 1636 reterr = nfsrv_locallock(vp, lfp, 1637 (new_lop->lo_flags & (NFSLCK_READ | NFSLCK_WRITE)), 1638 new_lop->lo_first, new_lop->lo_end, cfp, p); 1639 NFSLOCKSTATE(); 1640 } 1641 } 1642 1643 if (specialid == 0) { 1644 if (new_stp->ls_flags & NFSLCK_TEST) { 1645 /* 1646 * RFC 3530 does not list LockT as an op that renews a 1647 * lease, but the concensus seems to be that it is ok 1648 * for a server to do so. 1649 */ 1650 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1651 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1652 1653 /* 1654 * Since NFSERR_EXPIRED, NFSERR_ADMINREVOKED are not valid 1655 * error returns for LockT, just go ahead and test for a lock, 1656 * since there are no locks for this client, but other locks 1657 * can conflict. (ie. same client will always be false) 1658 */ 1659 if (error == NFSERR_EXPIRED || error == NFSERR_ADMINREVOKED) 1660 error = 0; 1661 lckstp = new_stp; 1662 } else { 1663 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 1664 (nfsquad_t)((u_quad_t)0), 0, nd, p); 1665 if (error == 0) 1666 /* 1667 * Look up the stateid 1668 */ 1669 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 1670 new_stp->ls_flags, &stp); 1671 /* 1672 * do some sanity checks for an unconfirmed open or a 1673 * stateid that refers to the wrong file, for an open stateid 1674 */ 1675 if (error == 0 && (stp->ls_flags & NFSLCK_OPEN) && 1676 ((stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM) || 1677 (getlckret == 0 && stp->ls_lfp != lfp))) 1678 error = NFSERR_BADSTATEID; 1679 if (error == 0 && 1680 (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) && 1681 getlckret == 0 && stp->ls_lfp != lfp) 1682 error = NFSERR_BADSTATEID; 1683 1684 /* 1685 * If the lockowner stateid doesn't refer to the same file, 1686 * I believe that is considered ok, since some clients will 1687 * only create a single lockowner and use that for all locks 1688 * on all files. 1689 * For now, log it as a diagnostic, instead of considering it 1690 * a BadStateid. 1691 */ 1692 if (error == 0 && (stp->ls_flags & 1693 (NFSLCK_OPEN | NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) == 0 && 1694 getlckret == 0 && stp->ls_lfp != lfp) { 1695#ifdef DIAGNOSTIC 1696 printf("Got a lock statid for different file open\n"); 1697#endif 1698 /* 1699 error = NFSERR_BADSTATEID; 1700 */ 1701 } 1702 1703 if (error == 0) { 1704 if (new_stp->ls_flags & NFSLCK_OPENTOLOCK) { 1705 /* 1706 * If haslock set, we've already checked the seqid. 1707 */ 1708 if (!haslock) { 1709 if (stp->ls_flags & NFSLCK_OPEN) 1710 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1711 stp->ls_openowner, new_stp->ls_op); 1712 else 1713 error = NFSERR_BADSTATEID; 1714 } 1715 if (!error) 1716 nfsrv_getowner(&stp->ls_open, new_stp, &lckstp); 1717 if (lckstp) 1718 /* 1719 * I believe this should be an error, but it 1720 * isn't obvious what NFSERR_xxx would be 1721 * appropriate, so I'll use NFSERR_INVAL for now. 1722 */ 1723 error = NFSERR_INVAL; 1724 else 1725 lckstp = new_stp; 1726 } else if (new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK)) { 1727 /* 1728 * If haslock set, ditto above. 1729 */ 1730 if (!haslock) { 1731 if (stp->ls_flags & NFSLCK_OPEN) 1732 error = NFSERR_BADSTATEID; 1733 else 1734 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 1735 stp, new_stp->ls_op); 1736 } 1737 lckstp = stp; 1738 } else { 1739 lckstp = stp; 1740 } 1741 } 1742 /* 1743 * If the seqid part of the stateid isn't the same, return 1744 * NFSERR_OLDSTATEID for cases other than I/O Ops. 1745 * For I/O Ops, only return NFSERR_OLDSTATEID if 1746 * nfsrv_returnoldstateid is set. (The concensus on the email 1747 * list was that most clients would prefer to not receive 1748 * NFSERR_OLDSTATEID for I/O Ops, but the RFC suggests that that 1749 * is what will happen, so I use the nfsrv_returnoldstateid to 1750 * allow for either server configuration.) 1751 */ 1752 if (!error && stp->ls_stateid.seqid!=new_stp->ls_stateid.seqid && 1753 (((nd->nd_flag & ND_NFSV41) == 0 && 1754 (!(new_stp->ls_flags & NFSLCK_CHECK) || 1755 nfsrv_returnoldstateid)) || 1756 ((nd->nd_flag & ND_NFSV41) != 0 && 1757 new_stp->ls_stateid.seqid != 0))) 1758 error = NFSERR_OLDSTATEID; 1759 } 1760 } 1761 1762 /* 1763 * Now we can check for grace. 1764 */ 1765 if (!error) 1766 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 1767 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 1768 nfsrv_checkstable(clp)) 1769 error = NFSERR_NOGRACE; 1770 /* 1771 * If we successfully Reclaimed state, note that. 1772 */ 1773 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error) 1774 nfsrv_markstable(clp); 1775 1776 /* 1777 * At this point, either error == NFSERR_BADSTATEID or the 1778 * seqid# has been updated, so we can return any error. 1779 * If error == 0, there may be an error in: 1780 * nd_repstat - Set by the calling function. 1781 * reterr - Set above, if getting the nfslockfile structure 1782 * or acquiring the local lock failed. 1783 * (If both of these are set, nd_repstat should probably be 1784 * returned, since that error was detected before this 1785 * function call.) 1786 */ 1787 if (error != 0 || nd->nd_repstat != 0 || reterr != 0) { 1788 if (error == 0) { 1789 if (nd->nd_repstat != 0) 1790 error = nd->nd_repstat; 1791 else 1792 error = reterr; 1793 } 1794 if (filestruct_locked != 0) { 1795 /* Roll back local locks. */ 1796 NFSUNLOCKSTATE(); 1797 if (vnode_unlocked == 0) { 1798 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl2"); 1799 vnode_unlocked = 1; 1800 NFSVOPUNLOCK(vp, 0); 1801 } 1802 nfsrv_locallock_rollback(vp, lfp, p); 1803 NFSLOCKSTATE(); 1804 nfsrv_unlocklf(lfp); 1805 } 1806 NFSUNLOCKSTATE(); 1807 goto out; 1808 } 1809 1810 /* 1811 * Check the nfsrv_getlockfile return. 1812 * Returned -1 if no structure found. 1813 */ 1814 if (getlckret == -1) { 1815 error = NFSERR_EXPIRED; 1816 /* 1817 * Called from lockt, so no lock is OK. 1818 */ 1819 if (new_stp->ls_flags & NFSLCK_TEST) { 1820 error = 0; 1821 } else if (new_stp->ls_flags & 1822 (NFSLCK_CHECK | NFSLCK_SETATTR)) { 1823 /* 1824 * Called to check for a lock, OK if the stateid is all 1825 * 1s or all 0s, but there should be an nfsstate 1826 * otherwise. 1827 * (ie. If there is no open, I'll assume no share 1828 * deny bits.) 1829 */ 1830 if (specialid) 1831 error = 0; 1832 else 1833 error = NFSERR_BADSTATEID; 1834 } 1835 NFSUNLOCKSTATE(); 1836 goto out; 1837 } 1838 1839 /* 1840 * For NFSLCK_CHECK and NFSLCK_LOCK, test for a share conflict. 1841 * For NFSLCK_CHECK, allow a read if write access is granted, 1842 * but check for a deny. For NFSLCK_LOCK, require correct access, 1843 * which implies a conflicting deny can't exist. 1844 */ 1845 if (new_stp->ls_flags & (NFSLCK_CHECK | NFSLCK_LOCK)) { 1846 /* 1847 * Four kinds of state id: 1848 * - specialid (all 0s or all 1s), only for NFSLCK_CHECK 1849 * - stateid for an open 1850 * - stateid for a delegation 1851 * - stateid for a lock owner 1852 */ 1853 if (!specialid) { 1854 if (stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 1855 delegation = 1; 1856 mystp = stp; 1857 nfsrv_delaydelegtimeout(stp); 1858 } else if (stp->ls_flags & NFSLCK_OPEN) { 1859 mystp = stp; 1860 } else { 1861 mystp = stp->ls_openstp; 1862 } 1863 /* 1864 * If locking or checking, require correct access 1865 * bit set. 1866 */ 1867 if (((new_stp->ls_flags & NFSLCK_LOCK) && 1868 !((new_lop->lo_flags >> NFSLCK_LOCKSHIFT) & 1869 mystp->ls_flags & NFSLCK_ACCESSBITS)) || 1870 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_READACCESS)) == 1871 (NFSLCK_CHECK | NFSLCK_READACCESS) && 1872 !(mystp->ls_flags & NFSLCK_READACCESS)) || 1873 ((new_stp->ls_flags & (NFSLCK_CHECK|NFSLCK_WRITEACCESS)) == 1874 (NFSLCK_CHECK | NFSLCK_WRITEACCESS) && 1875 !(mystp->ls_flags & NFSLCK_WRITEACCESS))) { 1876 if (filestruct_locked != 0) { 1877 /* Roll back local locks. */ 1878 NFSUNLOCKSTATE(); 1879 if (vnode_unlocked == 0) { 1880 ASSERT_VOP_ELOCKED(vp, 1881 "nfsrv_lockctrl3"); 1882 vnode_unlocked = 1; 1883 NFSVOPUNLOCK(vp, 0); 1884 } 1885 nfsrv_locallock_rollback(vp, lfp, p); 1886 NFSLOCKSTATE(); 1887 nfsrv_unlocklf(lfp); 1888 } 1889 NFSUNLOCKSTATE(); 1890 error = NFSERR_OPENMODE; 1891 goto out; 1892 } 1893 } else 1894 mystp = NULL; 1895 if ((new_stp->ls_flags & NFSLCK_CHECK) && !delegation) { 1896 /* 1897 * Check for a conflicting deny bit. 1898 */ 1899 LIST_FOREACH(tstp, &lfp->lf_open, ls_file) { 1900 if (tstp != mystp) { 1901 bits = tstp->ls_flags; 1902 bits >>= NFSLCK_SHIFT; 1903 if (new_stp->ls_flags & bits & NFSLCK_ACCESSBITS) { 1904 KASSERT(vnode_unlocked == 0, 1905 ("nfsrv_lockctrl: vnode unlocked1")); 1906 ret = nfsrv_clientconflict(tstp->ls_clp, &haslock, 1907 vp, p); 1908 if (ret == 1) { 1909 /* 1910 * nfsrv_clientconflict unlocks state 1911 * when it returns non-zero. 1912 */ 1913 lckstp = NULL; 1914 goto tryagain; 1915 } 1916 if (ret == 0) 1917 NFSUNLOCKSTATE(); 1918 if (ret == 2) 1919 error = NFSERR_PERM; 1920 else 1921 error = NFSERR_OPENMODE; 1922 goto out; 1923 } 1924 } 1925 } 1926 1927 /* We're outta here */ 1928 NFSUNLOCKSTATE(); 1929 goto out; 1930 } 1931 } 1932 1933 /* 1934 * For setattr, just get rid of all the Delegations for other clients. 1935 */ 1936 if (new_stp->ls_flags & NFSLCK_SETATTR) { 1937 KASSERT(vnode_unlocked == 0, 1938 ("nfsrv_lockctrl: vnode unlocked2")); 1939 ret = nfsrv_cleandeleg(vp, lfp, clp, &haslock, p); 1940 if (ret) { 1941 /* 1942 * nfsrv_cleandeleg() unlocks state when it 1943 * returns non-zero. 1944 */ 1945 if (ret == -1) { 1946 lckstp = NULL; 1947 goto tryagain; 1948 } 1949 error = ret; 1950 goto out; 1951 } 1952 if (!(new_stp->ls_flags & NFSLCK_CHECK) || 1953 (LIST_EMPTY(&lfp->lf_open) && LIST_EMPTY(&lfp->lf_lock) && 1954 LIST_EMPTY(&lfp->lf_deleg))) { 1955 NFSUNLOCKSTATE(); 1956 goto out; 1957 } 1958 } 1959 1960 /* 1961 * Check for a conflicting delegation. If one is found, call 1962 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 1963 * been set yet, it will get the lock. Otherwise, it will recall 1964 * the delegation. Then, we try try again... 1965 * I currently believe the conflict algorithm to be: 1966 * For Lock Ops (Lock/LockT/LockU) 1967 * - there is a conflict iff a different client has a write delegation 1968 * For Reading (Read Op) 1969 * - there is a conflict iff a different client has a write delegation 1970 * (the specialids are always a different client) 1971 * For Writing (Write/Setattr of size) 1972 * - there is a conflict if a different client has any delegation 1973 * - there is a conflict if the same client has a read delegation 1974 * (I don't understand why this isn't allowed, but that seems to be 1975 * the current concensus?) 1976 */ 1977 tstp = LIST_FIRST(&lfp->lf_deleg); 1978 while (tstp != LIST_END(&lfp->lf_deleg)) { 1979 nstp = LIST_NEXT(tstp, ls_file); 1980 if ((((new_stp->ls_flags&(NFSLCK_LOCK|NFSLCK_UNLOCK|NFSLCK_TEST))|| 1981 ((new_stp->ls_flags & NFSLCK_CHECK) && 1982 (new_lop->lo_flags & NFSLCK_READ))) && 1983 clp != tstp->ls_clp && 1984 (tstp->ls_flags & NFSLCK_DELEGWRITE)) || 1985 ((new_stp->ls_flags & NFSLCK_CHECK) && 1986 (new_lop->lo_flags & NFSLCK_WRITE) && 1987 (clp != tstp->ls_clp || 1988 (tstp->ls_flags & NFSLCK_DELEGREAD)))) { 1989 ret = 0; 1990 if (filestruct_locked != 0) { 1991 /* Roll back local locks. */ 1992 NFSUNLOCKSTATE(); 1993 if (vnode_unlocked == 0) { 1994 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl4"); 1995 NFSVOPUNLOCK(vp, 0); 1996 } 1997 nfsrv_locallock_rollback(vp, lfp, p); 1998 NFSLOCKSTATE(); 1999 nfsrv_unlocklf(lfp); 2000 NFSUNLOCKSTATE(); 2001 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2002 vnode_unlocked = 0; 2003 if ((vp->v_iflag & VI_DOOMED) != 0) 2004 ret = NFSERR_SERVERFAULT; 2005 NFSLOCKSTATE(); 2006 } 2007 if (ret == 0) 2008 ret = nfsrv_delegconflict(tstp, &haslock, p, vp); 2009 if (ret) { 2010 /* 2011 * nfsrv_delegconflict unlocks state when it 2012 * returns non-zero, which it always does. 2013 */ 2014 if (other_lop) { 2015 FREE((caddr_t)other_lop, M_NFSDLOCK); 2016 other_lop = NULL; 2017 } 2018 if (ret == -1) { 2019 lckstp = NULL; 2020 goto tryagain; 2021 } 2022 error = ret; 2023 goto out; 2024 } 2025 /* Never gets here. */ 2026 } 2027 tstp = nstp; 2028 } 2029 2030 /* 2031 * Handle the unlock case by calling nfsrv_updatelock(). 2032 * (Should I have done some access checking above for unlock? For now, 2033 * just let it happen.) 2034 */ 2035 if (new_stp->ls_flags & NFSLCK_UNLOCK) { 2036 first = new_lop->lo_first; 2037 end = new_lop->lo_end; 2038 nfsrv_updatelock(stp, new_lopp, &other_lop, lfp); 2039 stateidp->seqid = ++(stp->ls_stateid.seqid); 2040 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2041 stateidp->seqid = stp->ls_stateid.seqid = 1; 2042 stateidp->other[0] = stp->ls_stateid.other[0]; 2043 stateidp->other[1] = stp->ls_stateid.other[1]; 2044 stateidp->other[2] = stp->ls_stateid.other[2]; 2045 if (filestruct_locked != 0) { 2046 NFSUNLOCKSTATE(); 2047 if (vnode_unlocked == 0) { 2048 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl5"); 2049 vnode_unlocked = 1; 2050 NFSVOPUNLOCK(vp, 0); 2051 } 2052 /* Update the local locks. */ 2053 nfsrv_localunlock(vp, lfp, first, end, p); 2054 NFSLOCKSTATE(); 2055 nfsrv_unlocklf(lfp); 2056 } 2057 NFSUNLOCKSTATE(); 2058 goto out; 2059 } 2060 2061 /* 2062 * Search for a conflicting lock. A lock conflicts if: 2063 * - the lock range overlaps and 2064 * - at least one lock is a write lock and 2065 * - it is not owned by the same lock owner 2066 */ 2067 if (!delegation) { 2068 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 2069 if (new_lop->lo_end > lop->lo_first && 2070 new_lop->lo_first < lop->lo_end && 2071 (new_lop->lo_flags == NFSLCK_WRITE || 2072 lop->lo_flags == NFSLCK_WRITE) && 2073 lckstp != lop->lo_stp && 2074 (clp != lop->lo_stp->ls_clp || 2075 lckstp->ls_ownerlen != lop->lo_stp->ls_ownerlen || 2076 NFSBCMP(lckstp->ls_owner, lop->lo_stp->ls_owner, 2077 lckstp->ls_ownerlen))) { 2078 if (other_lop) { 2079 FREE((caddr_t)other_lop, M_NFSDLOCK); 2080 other_lop = NULL; 2081 } 2082 if (vnode_unlocked != 0) 2083 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2084 NULL, p); 2085 else 2086 ret = nfsrv_clientconflict(lop->lo_stp->ls_clp, &haslock, 2087 vp, p); 2088 if (ret == 1) { 2089 if (filestruct_locked != 0) { 2090 if (vnode_unlocked == 0) { 2091 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl6"); 2092 NFSVOPUNLOCK(vp, 0); 2093 } 2094 /* Roll back local locks. */ 2095 nfsrv_locallock_rollback(vp, lfp, p); 2096 NFSLOCKSTATE(); 2097 nfsrv_unlocklf(lfp); 2098 NFSUNLOCKSTATE(); 2099 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2100 vnode_unlocked = 0; 2101 if ((vp->v_iflag & VI_DOOMED) != 0) { 2102 error = NFSERR_SERVERFAULT; 2103 goto out; 2104 } 2105 } 2106 /* 2107 * nfsrv_clientconflict() unlocks state when it 2108 * returns non-zero. 2109 */ 2110 lckstp = NULL; 2111 goto tryagain; 2112 } 2113 /* 2114 * Found a conflicting lock, so record the conflict and 2115 * return the error. 2116 */ 2117 if (cfp != NULL && ret == 0) { 2118 cfp->cl_clientid.lval[0]=lop->lo_stp->ls_stateid.other[0]; 2119 cfp->cl_clientid.lval[1]=lop->lo_stp->ls_stateid.other[1]; 2120 cfp->cl_first = lop->lo_first; 2121 cfp->cl_end = lop->lo_end; 2122 cfp->cl_flags = lop->lo_flags; 2123 cfp->cl_ownerlen = lop->lo_stp->ls_ownerlen; 2124 NFSBCOPY(lop->lo_stp->ls_owner, cfp->cl_owner, 2125 cfp->cl_ownerlen); 2126 } 2127 if (ret == 2) 2128 error = NFSERR_PERM; 2129 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2130 error = NFSERR_RECLAIMCONFLICT; 2131 else if (new_stp->ls_flags & NFSLCK_CHECK) 2132 error = NFSERR_LOCKED; 2133 else 2134 error = NFSERR_DENIED; 2135 if (filestruct_locked != 0 && ret == 0) { 2136 /* Roll back local locks. */ 2137 NFSUNLOCKSTATE(); 2138 if (vnode_unlocked == 0) { 2139 ASSERT_VOP_ELOCKED(vp, "nfsrv_lockctrl7"); 2140 vnode_unlocked = 1; 2141 NFSVOPUNLOCK(vp, 0); 2142 } 2143 nfsrv_locallock_rollback(vp, lfp, p); 2144 NFSLOCKSTATE(); 2145 nfsrv_unlocklf(lfp); 2146 } 2147 if (ret == 0) 2148 NFSUNLOCKSTATE(); 2149 goto out; 2150 } 2151 } 2152 } 2153 2154 /* 2155 * We only get here if there was no lock that conflicted. 2156 */ 2157 if (new_stp->ls_flags & (NFSLCK_TEST | NFSLCK_CHECK)) { 2158 NFSUNLOCKSTATE(); 2159 goto out; 2160 } 2161 2162 /* 2163 * We only get here when we are creating or modifying a lock. 2164 * There are two variants: 2165 * - exist_lock_owner where lock_owner exists 2166 * - open_to_lock_owner with new lock_owner 2167 */ 2168 first = new_lop->lo_first; 2169 end = new_lop->lo_end; 2170 lock_flags = new_lop->lo_flags; 2171 if (!(new_stp->ls_flags & NFSLCK_OPENTOLOCK)) { 2172 nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp); 2173 stateidp->seqid = ++(lckstp->ls_stateid.seqid); 2174 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 2175 stateidp->seqid = lckstp->ls_stateid.seqid = 1; 2176 stateidp->other[0] = lckstp->ls_stateid.other[0]; 2177 stateidp->other[1] = lckstp->ls_stateid.other[1]; 2178 stateidp->other[2] = lckstp->ls_stateid.other[2]; 2179 } else { 2180 /* 2181 * The new open_to_lock_owner case. 2182 * Link the new nfsstate into the lists. 2183 */ 2184 new_stp->ls_seq = new_stp->ls_opentolockseq; 2185 nfsrvd_refcache(new_stp->ls_op); 2186 stateidp->seqid = new_stp->ls_stateid.seqid = 1; 2187 stateidp->other[0] = new_stp->ls_stateid.other[0] = 2188 clp->lc_clientid.lval[0]; 2189 stateidp->other[1] = new_stp->ls_stateid.other[1] = 2190 clp->lc_clientid.lval[1]; 2191 stateidp->other[2] = new_stp->ls_stateid.other[2] = 2192 nfsrv_nextstateindex(clp); 2193 new_stp->ls_clp = clp; 2194 LIST_INIT(&new_stp->ls_lock); 2195 new_stp->ls_openstp = stp; 2196 new_stp->ls_lfp = lfp; 2197 nfsrv_insertlock(new_lop, (struct nfslock *)new_stp, new_stp, 2198 lfp); 2199 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_stp->ls_stateid), 2200 new_stp, ls_hash); 2201 LIST_INSERT_HEAD(&stp->ls_open, new_stp, ls_list); 2202 *new_lopp = NULL; 2203 *new_stpp = NULL; 2204 newnfsstats.srvlockowners++; 2205 nfsrv_openpluslock++; 2206 } 2207 if (filestruct_locked != 0) { 2208 NFSUNLOCKSTATE(); 2209 nfsrv_locallock_commit(lfp, lock_flags, first, end); 2210 NFSLOCKSTATE(); 2211 nfsrv_unlocklf(lfp); 2212 } 2213 NFSUNLOCKSTATE(); 2214 2215out: 2216 if (haslock) { 2217 NFSLOCKV4ROOTMUTEX(); 2218 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2219 NFSUNLOCKV4ROOTMUTEX(); 2220 } 2221 if (vnode_unlocked != 0) { 2222 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 2223 if (error == 0 && (vp->v_iflag & VI_DOOMED) != 0) 2224 error = NFSERR_SERVERFAULT; 2225 } 2226 if (other_lop) 2227 FREE((caddr_t)other_lop, M_NFSDLOCK); 2228 NFSEXITCODE2(error, nd); 2229 return (error); 2230} 2231 2232/* 2233 * Check for state errors for Open. 2234 * repstat is passed back out as an error if more critical errors 2235 * are not detected. 2236 */ 2237APPLESTATIC int 2238nfsrv_opencheck(nfsquad_t clientid, nfsv4stateid_t *stateidp, 2239 struct nfsstate *new_stp, vnode_t vp, struct nfsrv_descript *nd, 2240 NFSPROC_T *p, int repstat) 2241{ 2242 struct nfsstate *stp, *nstp; 2243 struct nfsclient *clp; 2244 struct nfsstate *ownerstp; 2245 struct nfslockfile *lfp, *new_lfp; 2246 int error = 0, haslock = 0, ret, readonly = 0, getfhret = 0; 2247 2248 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2249 readonly = 1; 2250 /* 2251 * Check for restart conditions (client and server). 2252 */ 2253 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2254 &new_stp->ls_stateid, 0); 2255 if (error) 2256 goto out; 2257 2258 /* 2259 * Check for state resource limit exceeded. 2260 * Technically this should be SMP protected, but the worst 2261 * case error is "out by one or two" on the count when it 2262 * returns NFSERR_RESOURCE and the limit is just a rather 2263 * arbitrary high water mark, so no harm is done. 2264 */ 2265 if (nfsrv_openpluslock > nfsrv_v4statelimit) { 2266 error = NFSERR_RESOURCE; 2267 goto out; 2268 } 2269 2270tryagain: 2271 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2272 M_NFSDLOCKFILE, M_WAITOK); 2273 if (vp) 2274 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2275 NULL, p); 2276 NFSLOCKSTATE(); 2277 /* 2278 * Get the nfsclient structure. 2279 */ 2280 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2281 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2282 2283 /* 2284 * Look up the open owner. See if it needs confirmation and 2285 * check the seq#, as required. 2286 */ 2287 if (!error) 2288 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2289 2290 if (!error && ownerstp) { 2291 error = nfsrv_checkseqid(nd, new_stp->ls_seq, ownerstp, 2292 new_stp->ls_op); 2293 /* 2294 * If the OpenOwner hasn't been confirmed, assume the 2295 * old one was a replay and this one is ok. 2296 * See: RFC3530 Sec. 14.2.18. 2297 */ 2298 if (error == NFSERR_BADSEQID && 2299 (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM)) 2300 error = 0; 2301 } 2302 2303 /* 2304 * Check for grace. 2305 */ 2306 if (!error) 2307 error = nfsrv_checkgrace(nd, clp, new_stp->ls_flags); 2308 if ((new_stp->ls_flags & NFSLCK_RECLAIM) && !error && 2309 nfsrv_checkstable(clp)) 2310 error = NFSERR_NOGRACE; 2311 2312 /* 2313 * If none of the above errors occurred, let repstat be 2314 * returned. 2315 */ 2316 if (repstat && !error) 2317 error = repstat; 2318 if (error) { 2319 NFSUNLOCKSTATE(); 2320 if (haslock) { 2321 NFSLOCKV4ROOTMUTEX(); 2322 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2323 NFSUNLOCKV4ROOTMUTEX(); 2324 } 2325 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2326 goto out; 2327 } 2328 2329 /* 2330 * If vp == NULL, the file doesn't exist yet, so return ok. 2331 * (This always happens on the first pass, so haslock must be 0.) 2332 */ 2333 if (vp == NULL) { 2334 NFSUNLOCKSTATE(); 2335 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2336 goto out; 2337 } 2338 2339 /* 2340 * Get the structure for the underlying file. 2341 */ 2342 if (getfhret) 2343 error = getfhret; 2344 else 2345 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2346 NULL, 0); 2347 if (new_lfp) 2348 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2349 if (error) { 2350 NFSUNLOCKSTATE(); 2351 if (haslock) { 2352 NFSLOCKV4ROOTMUTEX(); 2353 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2354 NFSUNLOCKV4ROOTMUTEX(); 2355 } 2356 goto out; 2357 } 2358 2359 /* 2360 * Search for a conflicting open/share. 2361 */ 2362 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2363 /* 2364 * For Delegate_Cur, search for the matching Delegation, 2365 * which indicates no conflict. 2366 * An old delegation should have been recovered by the 2367 * client doing a Claim_DELEGATE_Prev, so I won't let 2368 * it match and return NFSERR_EXPIRED. Should I let it 2369 * match? 2370 */ 2371 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2372 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2373 (((nd->nd_flag & ND_NFSV41) != 0 && 2374 stateidp->seqid == 0) || 2375 stateidp->seqid == stp->ls_stateid.seqid) && 2376 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2377 NFSX_STATEIDOTHER)) 2378 break; 2379 } 2380 if (stp == LIST_END(&lfp->lf_deleg) || 2381 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2382 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2383 NFSUNLOCKSTATE(); 2384 if (haslock) { 2385 NFSLOCKV4ROOTMUTEX(); 2386 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2387 NFSUNLOCKV4ROOTMUTEX(); 2388 } 2389 error = NFSERR_EXPIRED; 2390 goto out; 2391 } 2392 } 2393 2394 /* 2395 * Check for access/deny bit conflicts. I check for the same 2396 * owner as well, in case the client didn't bother. 2397 */ 2398 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2399 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR) && 2400 (((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2401 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2402 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2403 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS)))){ 2404 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2405 if (ret == 1) { 2406 /* 2407 * nfsrv_clientconflict() unlocks 2408 * state when it returns non-zero. 2409 */ 2410 goto tryagain; 2411 } 2412 if (ret == 2) 2413 error = NFSERR_PERM; 2414 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2415 error = NFSERR_RECLAIMCONFLICT; 2416 else 2417 error = NFSERR_SHAREDENIED; 2418 if (ret == 0) 2419 NFSUNLOCKSTATE(); 2420 if (haslock) { 2421 NFSLOCKV4ROOTMUTEX(); 2422 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2423 NFSUNLOCKV4ROOTMUTEX(); 2424 } 2425 goto out; 2426 } 2427 } 2428 2429 /* 2430 * Check for a conflicting delegation. If one is found, call 2431 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2432 * been set yet, it will get the lock. Otherwise, it will recall 2433 * the delegation. Then, we try try again... 2434 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2435 * isn't a conflict.) 2436 * I currently believe the conflict algorithm to be: 2437 * For Open with Read Access and Deny None 2438 * - there is a conflict iff a different client has a write delegation 2439 * For Open with other Write Access or any Deny except None 2440 * - there is a conflict if a different client has any delegation 2441 * - there is a conflict if the same client has a read delegation 2442 * (The current concensus is that this last case should be 2443 * considered a conflict since the client with a read delegation 2444 * could have done an Open with ReadAccess and WriteDeny 2445 * locally and then not have checked for the WriteDeny.) 2446 * Don't check for a Reclaim, since that will be dealt with 2447 * by nfsrv_openctrl(). 2448 */ 2449 if (!(new_stp->ls_flags & 2450 (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR | NFSLCK_RECLAIM))) { 2451 stp = LIST_FIRST(&lfp->lf_deleg); 2452 while (stp != LIST_END(&lfp->lf_deleg)) { 2453 nstp = LIST_NEXT(stp, ls_file); 2454 if ((readonly && stp->ls_clp != clp && 2455 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2456 (!readonly && (stp->ls_clp != clp || 2457 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2458 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2459 if (ret) { 2460 /* 2461 * nfsrv_delegconflict() unlocks state 2462 * when it returns non-zero. 2463 */ 2464 if (ret == -1) 2465 goto tryagain; 2466 error = ret; 2467 goto out; 2468 } 2469 } 2470 stp = nstp; 2471 } 2472 } 2473 NFSUNLOCKSTATE(); 2474 if (haslock) { 2475 NFSLOCKV4ROOTMUTEX(); 2476 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2477 NFSUNLOCKV4ROOTMUTEX(); 2478 } 2479 2480out: 2481 NFSEXITCODE2(error, nd); 2482 return (error); 2483} 2484 2485/* 2486 * Open control function to create/update open state for an open. 2487 */ 2488APPLESTATIC int 2489nfsrv_openctrl(struct nfsrv_descript *nd, vnode_t vp, 2490 struct nfsstate **new_stpp, nfsquad_t clientid, nfsv4stateid_t *stateidp, 2491 nfsv4stateid_t *delegstateidp, u_int32_t *rflagsp, struct nfsexstuff *exp, 2492 NFSPROC_T *p, u_quad_t filerev) 2493{ 2494 struct nfsstate *new_stp = *new_stpp; 2495 struct nfsstate *stp, *nstp; 2496 struct nfsstate *openstp = NULL, *new_open, *ownerstp, *new_deleg; 2497 struct nfslockfile *lfp, *new_lfp; 2498 struct nfsclient *clp; 2499 int error = 0, haslock = 0, ret, delegate = 1, writedeleg = 1; 2500 int readonly = 0, cbret = 1, getfhret = 0; 2501 2502 if ((new_stp->ls_flags & NFSLCK_SHAREBITS) == NFSLCK_READACCESS) 2503 readonly = 1; 2504 /* 2505 * Check for restart conditions (client and server). 2506 * (Paranoia, should have been detected by nfsrv_opencheck().) 2507 * If an error does show up, return NFSERR_EXPIRED, since the 2508 * the seqid# has already been incremented. 2509 */ 2510 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 2511 &new_stp->ls_stateid, 0); 2512 if (error) { 2513 printf("Nfsd: openctrl unexpected restart err=%d\n", 2514 error); 2515 error = NFSERR_EXPIRED; 2516 goto out; 2517 } 2518 2519tryagain: 2520 MALLOC(new_lfp, struct nfslockfile *, sizeof (struct nfslockfile), 2521 M_NFSDLOCKFILE, M_WAITOK); 2522 MALLOC(new_open, struct nfsstate *, sizeof (struct nfsstate), 2523 M_NFSDSTATE, M_WAITOK); 2524 MALLOC(new_deleg, struct nfsstate *, sizeof (struct nfsstate), 2525 M_NFSDSTATE, M_WAITOK); 2526 getfhret = nfsrv_getlockfh(vp, new_stp->ls_flags, new_lfp, 2527 NULL, p); 2528 NFSLOCKSTATE(); 2529 /* 2530 * Get the client structure. Since the linked lists could be changed 2531 * by other nfsd processes if this process does a tsleep(), one of 2532 * two things must be done. 2533 * 1 - don't tsleep() 2534 * or 2535 * 2 - get the nfsv4_lock() { indicated by haslock == 1 } 2536 * before using the lists, since this lock stops the other 2537 * nfsd. This should only be used for rare cases, since it 2538 * essentially single threads the nfsd. 2539 * At this time, it is only done for cases where the stable 2540 * storage file must be written prior to completion of state 2541 * expiration. 2542 */ 2543 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 2544 (nfsquad_t)((u_quad_t)0), 0, nd, p); 2545 if (!error && (clp->lc_flags & LCL_NEEDSCBNULL) && 2546 clp->lc_program) { 2547 /* 2548 * This happens on the first open for a client 2549 * that supports callbacks. 2550 */ 2551 NFSUNLOCKSTATE(); 2552 /* 2553 * Although nfsrv_docallback() will sleep, clp won't 2554 * go away, since they are only removed when the 2555 * nfsv4_lock() has blocked the nfsd threads. The 2556 * fields in clp can change, but having multiple 2557 * threads do this Null callback RPC should be 2558 * harmless. 2559 */ 2560 cbret = nfsrv_docallback(clp, NFSV4PROC_CBNULL, 2561 NULL, 0, NULL, NULL, NULL, p); 2562 NFSLOCKSTATE(); 2563 clp->lc_flags &= ~LCL_NEEDSCBNULL; 2564 if (!cbret) 2565 clp->lc_flags |= LCL_CALLBACKSON; 2566 } 2567 2568 /* 2569 * Look up the open owner. See if it needs confirmation and 2570 * check the seq#, as required. 2571 */ 2572 if (!error) 2573 nfsrv_getowner(&clp->lc_open, new_stp, &ownerstp); 2574 2575 if (error) { 2576 NFSUNLOCKSTATE(); 2577 printf("Nfsd: openctrl unexpected state err=%d\n", 2578 error); 2579 free((caddr_t)new_lfp, M_NFSDLOCKFILE); 2580 free((caddr_t)new_open, M_NFSDSTATE); 2581 free((caddr_t)new_deleg, M_NFSDSTATE); 2582 if (haslock) { 2583 NFSLOCKV4ROOTMUTEX(); 2584 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2585 NFSUNLOCKV4ROOTMUTEX(); 2586 } 2587 error = NFSERR_EXPIRED; 2588 goto out; 2589 } 2590 2591 if (new_stp->ls_flags & NFSLCK_RECLAIM) 2592 nfsrv_markstable(clp); 2593 2594 /* 2595 * Get the structure for the underlying file. 2596 */ 2597 if (getfhret) 2598 error = getfhret; 2599 else 2600 error = nfsrv_getlockfile(new_stp->ls_flags, &new_lfp, &lfp, 2601 NULL, 0); 2602 if (new_lfp) 2603 FREE((caddr_t)new_lfp, M_NFSDLOCKFILE); 2604 if (error) { 2605 NFSUNLOCKSTATE(); 2606 printf("Nfsd openctrl unexpected getlockfile err=%d\n", 2607 error); 2608 free((caddr_t)new_open, M_NFSDSTATE); 2609 free((caddr_t)new_deleg, M_NFSDSTATE); 2610 if (haslock) { 2611 NFSLOCKV4ROOTMUTEX(); 2612 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2613 NFSUNLOCKV4ROOTMUTEX(); 2614 } 2615 goto out; 2616 } 2617 2618 /* 2619 * Search for a conflicting open/share. 2620 */ 2621 if (new_stp->ls_flags & NFSLCK_DELEGCUR) { 2622 /* 2623 * For Delegate_Cur, search for the matching Delegation, 2624 * which indicates no conflict. 2625 * An old delegation should have been recovered by the 2626 * client doing a Claim_DELEGATE_Prev, so I won't let 2627 * it match and return NFSERR_EXPIRED. Should I let it 2628 * match? 2629 */ 2630 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2631 if (!(stp->ls_flags & NFSLCK_OLDDELEG) && 2632 (((nd->nd_flag & ND_NFSV41) != 0 && 2633 stateidp->seqid == 0) || 2634 stateidp->seqid == stp->ls_stateid.seqid) && 2635 !NFSBCMP(stateidp->other, stp->ls_stateid.other, 2636 NFSX_STATEIDOTHER)) 2637 break; 2638 } 2639 if (stp == LIST_END(&lfp->lf_deleg) || 2640 ((new_stp->ls_flags & NFSLCK_WRITEACCESS) && 2641 (stp->ls_flags & NFSLCK_DELEGREAD))) { 2642 NFSUNLOCKSTATE(); 2643 printf("Nfsd openctrl unexpected expiry\n"); 2644 free((caddr_t)new_open, M_NFSDSTATE); 2645 free((caddr_t)new_deleg, M_NFSDSTATE); 2646 if (haslock) { 2647 NFSLOCKV4ROOTMUTEX(); 2648 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2649 NFSUNLOCKV4ROOTMUTEX(); 2650 } 2651 error = NFSERR_EXPIRED; 2652 goto out; 2653 } 2654 2655 /* 2656 * Don't issue a Delegation, since one already exists and 2657 * delay delegation timeout, as required. 2658 */ 2659 delegate = 0; 2660 nfsrv_delaydelegtimeout(stp); 2661 } 2662 2663 /* 2664 * Check for access/deny bit conflicts. I also check for the 2665 * same owner, since the client might not have bothered to check. 2666 * Also, note an open for the same file and owner, if found, 2667 * which is all we do here for Delegate_Cur, since conflict 2668 * checking is already done. 2669 */ 2670 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 2671 if (ownerstp && stp->ls_openowner == ownerstp) 2672 openstp = stp; 2673 if (!(new_stp->ls_flags & NFSLCK_DELEGCUR)) { 2674 /* 2675 * If another client has the file open, the only 2676 * delegation that can be issued is a Read delegation 2677 * and only if it is a Read open with Deny none. 2678 */ 2679 if (clp != stp->ls_clp) { 2680 if ((stp->ls_flags & NFSLCK_SHAREBITS) == 2681 NFSLCK_READACCESS) 2682 writedeleg = 0; 2683 else 2684 delegate = 0; 2685 } 2686 if(((new_stp->ls_flags & NFSLCK_ACCESSBITS) & 2687 ((stp->ls_flags>>NFSLCK_SHIFT) & NFSLCK_ACCESSBITS))|| 2688 ((stp->ls_flags & NFSLCK_ACCESSBITS) & 2689 ((new_stp->ls_flags>>NFSLCK_SHIFT)&NFSLCK_ACCESSBITS))){ 2690 ret = nfsrv_clientconflict(stp->ls_clp,&haslock,vp,p); 2691 if (ret == 1) { 2692 /* 2693 * nfsrv_clientconflict() unlocks state 2694 * when it returns non-zero. 2695 */ 2696 free((caddr_t)new_open, M_NFSDSTATE); 2697 free((caddr_t)new_deleg, M_NFSDSTATE); 2698 openstp = NULL; 2699 goto tryagain; 2700 } 2701 if (ret == 2) 2702 error = NFSERR_PERM; 2703 else if (new_stp->ls_flags & NFSLCK_RECLAIM) 2704 error = NFSERR_RECLAIMCONFLICT; 2705 else 2706 error = NFSERR_SHAREDENIED; 2707 if (ret == 0) 2708 NFSUNLOCKSTATE(); 2709 if (haslock) { 2710 NFSLOCKV4ROOTMUTEX(); 2711 nfsv4_unlock(&nfsv4rootfs_lock, 1); 2712 NFSUNLOCKV4ROOTMUTEX(); 2713 } 2714 free((caddr_t)new_open, M_NFSDSTATE); 2715 free((caddr_t)new_deleg, M_NFSDSTATE); 2716 printf("nfsd openctrl unexpected client cnfl\n"); 2717 goto out; 2718 } 2719 } 2720 } 2721 2722 /* 2723 * Check for a conflicting delegation. If one is found, call 2724 * nfsrv_delegconflict() to handle it. If the v4root lock hasn't 2725 * been set yet, it will get the lock. Otherwise, it will recall 2726 * the delegation. Then, we try try again... 2727 * (If NFSLCK_DELEGCUR is set, it has a delegation, so there 2728 * isn't a conflict.) 2729 * I currently believe the conflict algorithm to be: 2730 * For Open with Read Access and Deny None 2731 * - there is a conflict iff a different client has a write delegation 2732 * For Open with other Write Access or any Deny except None 2733 * - there is a conflict if a different client has any delegation 2734 * - there is a conflict if the same client has a read delegation 2735 * (The current concensus is that this last case should be 2736 * considered a conflict since the client with a read delegation 2737 * could have done an Open with ReadAccess and WriteDeny 2738 * locally and then not have checked for the WriteDeny.) 2739 */ 2740 if (!(new_stp->ls_flags & (NFSLCK_DELEGPREV | NFSLCK_DELEGCUR))) { 2741 stp = LIST_FIRST(&lfp->lf_deleg); 2742 while (stp != LIST_END(&lfp->lf_deleg)) { 2743 nstp = LIST_NEXT(stp, ls_file); 2744 if (stp->ls_clp != clp && (stp->ls_flags & NFSLCK_DELEGREAD)) 2745 writedeleg = 0; 2746 else 2747 delegate = 0; 2748 if ((readonly && stp->ls_clp != clp && 2749 (stp->ls_flags & NFSLCK_DELEGWRITE)) || 2750 (!readonly && (stp->ls_clp != clp || 2751 (stp->ls_flags & NFSLCK_DELEGREAD)))) { 2752 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 2753 delegate = 2; 2754 } else { 2755 ret = nfsrv_delegconflict(stp, &haslock, p, vp); 2756 if (ret) { 2757 /* 2758 * nfsrv_delegconflict() unlocks state 2759 * when it returns non-zero. 2760 */ 2761 printf("Nfsd openctrl unexpected deleg cnfl\n"); 2762 free((caddr_t)new_open, M_NFSDSTATE); 2763 free((caddr_t)new_deleg, M_NFSDSTATE); 2764 if (ret == -1) { 2765 openstp = NULL; 2766 goto tryagain; 2767 } 2768 error = ret; 2769 goto out; 2770 } 2771 } 2772 } 2773 stp = nstp; 2774 } 2775 } 2776 2777 /* 2778 * We only get here if there was no open that conflicted. 2779 * If an open for the owner exists, or in the access/deny bits. 2780 * Otherwise it is a new open. If the open_owner hasn't been 2781 * confirmed, replace the open with the new one needing confirmation, 2782 * otherwise add the open. 2783 */ 2784 if (new_stp->ls_flags & NFSLCK_DELEGPREV) { 2785 /* 2786 * Handle NFSLCK_DELEGPREV by searching the old delegations for 2787 * a match. If found, just move the old delegation to the current 2788 * delegation list and issue open. If not found, return 2789 * NFSERR_EXPIRED. 2790 */ 2791 LIST_FOREACH(stp, &clp->lc_olddeleg, ls_list) { 2792 if (stp->ls_lfp == lfp) { 2793 /* Found it */ 2794 if (stp->ls_clp != clp) 2795 panic("olddeleg clp"); 2796 LIST_REMOVE(stp, ls_list); 2797 LIST_REMOVE(stp, ls_hash); 2798 stp->ls_flags &= ~NFSLCK_OLDDELEG; 2799 stp->ls_stateid.seqid = delegstateidp->seqid = 1; 2800 stp->ls_stateid.other[0] = delegstateidp->other[0] = 2801 clp->lc_clientid.lval[0]; 2802 stp->ls_stateid.other[1] = delegstateidp->other[1] = 2803 clp->lc_clientid.lval[1]; 2804 stp->ls_stateid.other[2] = delegstateidp->other[2] = 2805 nfsrv_nextstateindex(clp); 2806 stp->ls_compref = nd->nd_compref; 2807 LIST_INSERT_HEAD(&clp->lc_deleg, stp, ls_list); 2808 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2809 stp->ls_stateid), stp, ls_hash); 2810 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2811 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2812 else 2813 *rflagsp |= NFSV4OPEN_READDELEGATE; 2814 clp->lc_delegtime = NFSD_MONOSEC + 2815 nfsrv_lease + NFSRV_LEASEDELTA; 2816 2817 /* 2818 * Now, do the associated open. 2819 */ 2820 new_open->ls_stateid.seqid = 1; 2821 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2822 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2823 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2824 new_open->ls_flags = (new_stp->ls_flags&NFSLCK_DENYBITS)| 2825 NFSLCK_OPEN; 2826 if (stp->ls_flags & NFSLCK_DELEGWRITE) 2827 new_open->ls_flags |= (NFSLCK_READACCESS | 2828 NFSLCK_WRITEACCESS); 2829 else 2830 new_open->ls_flags |= NFSLCK_READACCESS; 2831 new_open->ls_uid = new_stp->ls_uid; 2832 new_open->ls_lfp = lfp; 2833 new_open->ls_clp = clp; 2834 LIST_INIT(&new_open->ls_open); 2835 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2836 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2837 new_open, ls_hash); 2838 /* 2839 * and handle the open owner 2840 */ 2841 if (ownerstp) { 2842 new_open->ls_openowner = ownerstp; 2843 LIST_INSERT_HEAD(&ownerstp->ls_open,new_open,ls_list); 2844 } else { 2845 new_open->ls_openowner = new_stp; 2846 new_stp->ls_flags = 0; 2847 nfsrvd_refcache(new_stp->ls_op); 2848 new_stp->ls_noopens = 0; 2849 LIST_INIT(&new_stp->ls_open); 2850 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2851 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2852 *new_stpp = NULL; 2853 newnfsstats.srvopenowners++; 2854 nfsrv_openpluslock++; 2855 } 2856 openstp = new_open; 2857 new_open = NULL; 2858 newnfsstats.srvopens++; 2859 nfsrv_openpluslock++; 2860 break; 2861 } 2862 } 2863 if (stp == LIST_END(&clp->lc_olddeleg)) 2864 error = NFSERR_EXPIRED; 2865 } else if (new_stp->ls_flags & (NFSLCK_DELEGREAD | NFSLCK_DELEGWRITE)) { 2866 /* 2867 * Scan to see that no delegation for this client and file 2868 * doesn't already exist. 2869 * There also shouldn't yet be an Open for this file and 2870 * openowner. 2871 */ 2872 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 2873 if (stp->ls_clp == clp) 2874 break; 2875 } 2876 if (stp == LIST_END(&lfp->lf_deleg) && openstp == NULL) { 2877 /* 2878 * This is the Claim_Previous case with a delegation 2879 * type != Delegate_None. 2880 */ 2881 /* 2882 * First, add the delegation. (Although we must issue the 2883 * delegation, we can also ask for an immediate return.) 2884 */ 2885 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 2886 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] = 2887 clp->lc_clientid.lval[0]; 2888 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] = 2889 clp->lc_clientid.lval[1]; 2890 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] = 2891 nfsrv_nextstateindex(clp); 2892 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) { 2893 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 2894 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 2895 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 2896 } else { 2897 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 2898 NFSLCK_READACCESS); 2899 *rflagsp |= NFSV4OPEN_READDELEGATE; 2900 } 2901 new_deleg->ls_uid = new_stp->ls_uid; 2902 new_deleg->ls_lfp = lfp; 2903 new_deleg->ls_clp = clp; 2904 new_deleg->ls_filerev = filerev; 2905 new_deleg->ls_compref = nd->nd_compref; 2906 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 2907 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 2908 new_deleg->ls_stateid), new_deleg, ls_hash); 2909 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 2910 new_deleg = NULL; 2911 if (delegate == 2 || nfsrv_issuedelegs == 0 || 2912 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 2913 LCL_CALLBACKSON || 2914 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) || 2915 !NFSVNO_DELEGOK(vp)) 2916 *rflagsp |= NFSV4OPEN_RECALL; 2917 newnfsstats.srvdelegates++; 2918 nfsrv_openpluslock++; 2919 nfsrv_delegatecnt++; 2920 2921 /* 2922 * Now, do the associated open. 2923 */ 2924 new_open->ls_stateid.seqid = 1; 2925 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 2926 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 2927 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 2928 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_DENYBITS) | 2929 NFSLCK_OPEN; 2930 if (new_stp->ls_flags & NFSLCK_DELEGWRITE) 2931 new_open->ls_flags |= (NFSLCK_READACCESS | 2932 NFSLCK_WRITEACCESS); 2933 else 2934 new_open->ls_flags |= NFSLCK_READACCESS; 2935 new_open->ls_uid = new_stp->ls_uid; 2936 new_open->ls_lfp = lfp; 2937 new_open->ls_clp = clp; 2938 LIST_INIT(&new_open->ls_open); 2939 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 2940 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 2941 new_open, ls_hash); 2942 /* 2943 * and handle the open owner 2944 */ 2945 if (ownerstp) { 2946 new_open->ls_openowner = ownerstp; 2947 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 2948 } else { 2949 new_open->ls_openowner = new_stp; 2950 new_stp->ls_flags = 0; 2951 nfsrvd_refcache(new_stp->ls_op); 2952 new_stp->ls_noopens = 0; 2953 LIST_INIT(&new_stp->ls_open); 2954 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 2955 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 2956 *new_stpp = NULL; 2957 newnfsstats.srvopenowners++; 2958 nfsrv_openpluslock++; 2959 } 2960 openstp = new_open; 2961 new_open = NULL; 2962 newnfsstats.srvopens++; 2963 nfsrv_openpluslock++; 2964 } else { 2965 error = NFSERR_RECLAIMCONFLICT; 2966 } 2967 } else if (ownerstp) { 2968 if (ownerstp->ls_flags & NFSLCK_NEEDSCONFIRM) { 2969 /* Replace the open */ 2970 if (ownerstp->ls_op) 2971 nfsrvd_derefcache(ownerstp->ls_op); 2972 ownerstp->ls_op = new_stp->ls_op; 2973 nfsrvd_refcache(ownerstp->ls_op); 2974 ownerstp->ls_seq = new_stp->ls_seq; 2975 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 2976 stp = LIST_FIRST(&ownerstp->ls_open); 2977 stp->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 2978 NFSLCK_OPEN; 2979 stp->ls_stateid.seqid = 1; 2980 stp->ls_uid = new_stp->ls_uid; 2981 if (lfp != stp->ls_lfp) { 2982 LIST_REMOVE(stp, ls_file); 2983 LIST_INSERT_HEAD(&lfp->lf_open, stp, ls_file); 2984 stp->ls_lfp = lfp; 2985 } 2986 openstp = stp; 2987 } else if (openstp) { 2988 openstp->ls_flags |= (new_stp->ls_flags & NFSLCK_SHAREBITS); 2989 openstp->ls_stateid.seqid++; 2990 if ((nd->nd_flag & ND_NFSV41) != 0 && 2991 openstp->ls_stateid.seqid == 0) 2992 openstp->ls_stateid.seqid = 1; 2993 2994 /* 2995 * This is where we can choose to issue a delegation. 2996 */ 2997 if (delegate == 0 || writedeleg == 0 || 2998 NFSVNO_EXRDONLY(exp) || (readonly != 0 && 2999 nfsrv_writedelegifpos == 0) || 3000 !NFSVNO_DELEGOK(vp) || 3001 (new_stp->ls_flags & NFSLCK_WANTRDELEG) != 0 || 3002 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3003 LCL_CALLBACKSON) 3004 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3005 else if (nfsrv_issuedelegs == 0 || 3006 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3007 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3008 else if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3009 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3010 else { 3011 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3012 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3013 = clp->lc_clientid.lval[0]; 3014 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3015 = clp->lc_clientid.lval[1]; 3016 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3017 = nfsrv_nextstateindex(clp); 3018 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3019 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3020 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3021 new_deleg->ls_uid = new_stp->ls_uid; 3022 new_deleg->ls_lfp = lfp; 3023 new_deleg->ls_clp = clp; 3024 new_deleg->ls_filerev = filerev; 3025 new_deleg->ls_compref = nd->nd_compref; 3026 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3027 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3028 new_deleg->ls_stateid), new_deleg, ls_hash); 3029 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3030 new_deleg = NULL; 3031 newnfsstats.srvdelegates++; 3032 nfsrv_openpluslock++; 3033 nfsrv_delegatecnt++; 3034 } 3035 } else { 3036 new_open->ls_stateid.seqid = 1; 3037 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3038 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3039 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3040 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS)| 3041 NFSLCK_OPEN; 3042 new_open->ls_uid = new_stp->ls_uid; 3043 new_open->ls_openowner = ownerstp; 3044 new_open->ls_lfp = lfp; 3045 new_open->ls_clp = clp; 3046 LIST_INIT(&new_open->ls_open); 3047 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3048 LIST_INSERT_HEAD(&ownerstp->ls_open, new_open, ls_list); 3049 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3050 new_open, ls_hash); 3051 openstp = new_open; 3052 new_open = NULL; 3053 newnfsstats.srvopens++; 3054 nfsrv_openpluslock++; 3055 3056 /* 3057 * This is where we can choose to issue a delegation. 3058 */ 3059 if (delegate == 0 || (writedeleg == 0 && readonly == 0) || 3060 !NFSVNO_DELEGOK(vp) || 3061 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) != 3062 LCL_CALLBACKSON) 3063 *rflagsp |= NFSV4OPEN_WDCONTENTION; 3064 else if (nfsrv_issuedelegs == 0 || 3065 NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt)) 3066 *rflagsp |= NFSV4OPEN_WDRESOURCE; 3067 else if ((new_stp->ls_flags & NFSLCK_WANTNODELEG) != 0) 3068 *rflagsp |= NFSV4OPEN_WDNOTWANTED; 3069 else { 3070 new_deleg->ls_stateid.seqid = delegstateidp->seqid = 1; 3071 new_deleg->ls_stateid.other[0] = delegstateidp->other[0] 3072 = clp->lc_clientid.lval[0]; 3073 new_deleg->ls_stateid.other[1] = delegstateidp->other[1] 3074 = clp->lc_clientid.lval[1]; 3075 new_deleg->ls_stateid.other[2] = delegstateidp->other[2] 3076 = nfsrv_nextstateindex(clp); 3077 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3078 (nfsrv_writedelegifpos || !readonly) && 3079 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 0) { 3080 new_deleg->ls_flags = (NFSLCK_DELEGWRITE | 3081 NFSLCK_READACCESS | NFSLCK_WRITEACCESS); 3082 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3083 } else { 3084 new_deleg->ls_flags = (NFSLCK_DELEGREAD | 3085 NFSLCK_READACCESS); 3086 *rflagsp |= NFSV4OPEN_READDELEGATE; 3087 } 3088 new_deleg->ls_uid = new_stp->ls_uid; 3089 new_deleg->ls_lfp = lfp; 3090 new_deleg->ls_clp = clp; 3091 new_deleg->ls_filerev = filerev; 3092 new_deleg->ls_compref = nd->nd_compref; 3093 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, ls_file); 3094 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3095 new_deleg->ls_stateid), new_deleg, ls_hash); 3096 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, ls_list); 3097 new_deleg = NULL; 3098 newnfsstats.srvdelegates++; 3099 nfsrv_openpluslock++; 3100 nfsrv_delegatecnt++; 3101 } 3102 } 3103 } else { 3104 /* 3105 * New owner case. Start the open_owner sequence with a 3106 * Needs confirmation (unless a reclaim) and hang the 3107 * new open off it. 3108 */ 3109 new_open->ls_stateid.seqid = 1; 3110 new_open->ls_stateid.other[0] = clp->lc_clientid.lval[0]; 3111 new_open->ls_stateid.other[1] = clp->lc_clientid.lval[1]; 3112 new_open->ls_stateid.other[2] = nfsrv_nextstateindex(clp); 3113 new_open->ls_flags = (new_stp->ls_flags & NFSLCK_SHAREBITS) | 3114 NFSLCK_OPEN; 3115 new_open->ls_uid = new_stp->ls_uid; 3116 LIST_INIT(&new_open->ls_open); 3117 new_open->ls_openowner = new_stp; 3118 new_open->ls_lfp = lfp; 3119 new_open->ls_clp = clp; 3120 LIST_INSERT_HEAD(&lfp->lf_open, new_open, ls_file); 3121 if (new_stp->ls_flags & NFSLCK_RECLAIM) { 3122 new_stp->ls_flags = 0; 3123 } else if ((nd->nd_flag & ND_NFSV41) != 0) { 3124 /* NFSv4.1 never needs confirmation. */ 3125 new_stp->ls_flags = 0; 3126 3127 /* 3128 * This is where we can choose to issue a delegation. 3129 */ 3130 if (delegate && nfsrv_issuedelegs && 3131 (writedeleg || readonly) && 3132 (clp->lc_flags & (LCL_CALLBACKSON | LCL_CBDOWN)) == 3133 LCL_CALLBACKSON && 3134 !NFSRV_V4DELEGLIMIT(nfsrv_delegatecnt) && 3135 NFSVNO_DELEGOK(vp) && 3136 ((nd->nd_flag & ND_NFSV41) == 0 || 3137 (new_stp->ls_flags & NFSLCK_WANTNODELEG) == 0)) { 3138 new_deleg->ls_stateid.seqid = 3139 delegstateidp->seqid = 1; 3140 new_deleg->ls_stateid.other[0] = 3141 delegstateidp->other[0] 3142 = clp->lc_clientid.lval[0]; 3143 new_deleg->ls_stateid.other[1] = 3144 delegstateidp->other[1] 3145 = clp->lc_clientid.lval[1]; 3146 new_deleg->ls_stateid.other[2] = 3147 delegstateidp->other[2] 3148 = nfsrv_nextstateindex(clp); 3149 if (writedeleg && !NFSVNO_EXRDONLY(exp) && 3150 (nfsrv_writedelegifpos || !readonly) && 3151 ((nd->nd_flag & ND_NFSV41) == 0 || 3152 (new_stp->ls_flags & NFSLCK_WANTRDELEG) == 3153 0)) { 3154 new_deleg->ls_flags = 3155 (NFSLCK_DELEGWRITE | 3156 NFSLCK_READACCESS | 3157 NFSLCK_WRITEACCESS); 3158 *rflagsp |= NFSV4OPEN_WRITEDELEGATE; 3159 } else { 3160 new_deleg->ls_flags = 3161 (NFSLCK_DELEGREAD | 3162 NFSLCK_READACCESS); 3163 *rflagsp |= NFSV4OPEN_READDELEGATE; 3164 } 3165 new_deleg->ls_uid = new_stp->ls_uid; 3166 new_deleg->ls_lfp = lfp; 3167 new_deleg->ls_clp = clp; 3168 new_deleg->ls_filerev = filerev; 3169 new_deleg->ls_compref = nd->nd_compref; 3170 LIST_INSERT_HEAD(&lfp->lf_deleg, new_deleg, 3171 ls_file); 3172 LIST_INSERT_HEAD(NFSSTATEHASH(clp, 3173 new_deleg->ls_stateid), new_deleg, ls_hash); 3174 LIST_INSERT_HEAD(&clp->lc_deleg, new_deleg, 3175 ls_list); 3176 new_deleg = NULL; 3177 newnfsstats.srvdelegates++; 3178 nfsrv_openpluslock++; 3179 nfsrv_delegatecnt++; 3180 } 3181 } else { 3182 *rflagsp |= NFSV4OPEN_RESULTCONFIRM; 3183 new_stp->ls_flags = NFSLCK_NEEDSCONFIRM; 3184 } 3185 nfsrvd_refcache(new_stp->ls_op); 3186 new_stp->ls_noopens = 0; 3187 LIST_INIT(&new_stp->ls_open); 3188 LIST_INSERT_HEAD(&new_stp->ls_open, new_open, ls_list); 3189 LIST_INSERT_HEAD(&clp->lc_open, new_stp, ls_list); 3190 LIST_INSERT_HEAD(NFSSTATEHASH(clp, new_open->ls_stateid), 3191 new_open, ls_hash); 3192 openstp = new_open; 3193 new_open = NULL; 3194 *new_stpp = NULL; 3195 newnfsstats.srvopens++; 3196 nfsrv_openpluslock++; 3197 newnfsstats.srvopenowners++; 3198 nfsrv_openpluslock++; 3199 } 3200 if (!error) { 3201 stateidp->seqid = openstp->ls_stateid.seqid; 3202 stateidp->other[0] = openstp->ls_stateid.other[0]; 3203 stateidp->other[1] = openstp->ls_stateid.other[1]; 3204 stateidp->other[2] = openstp->ls_stateid.other[2]; 3205 } 3206 NFSUNLOCKSTATE(); 3207 if (haslock) { 3208 NFSLOCKV4ROOTMUTEX(); 3209 nfsv4_unlock(&nfsv4rootfs_lock, 1); 3210 NFSUNLOCKV4ROOTMUTEX(); 3211 } 3212 if (new_open) 3213 FREE((caddr_t)new_open, M_NFSDSTATE); 3214 if (new_deleg) 3215 FREE((caddr_t)new_deleg, M_NFSDSTATE); 3216 3217out: 3218 NFSEXITCODE2(error, nd); 3219 return (error); 3220} 3221 3222/* 3223 * Open update. Does the confirm, downgrade and close. 3224 */ 3225APPLESTATIC int 3226nfsrv_openupdate(vnode_t vp, struct nfsstate *new_stp, nfsquad_t clientid, 3227 nfsv4stateid_t *stateidp, struct nfsrv_descript *nd, NFSPROC_T *p) 3228{ 3229 struct nfsstate *stp, *ownerstp; 3230 struct nfsclient *clp; 3231 struct nfslockfile *lfp; 3232 u_int32_t bits; 3233 int error = 0, gotstate = 0, len = 0; 3234 u_char client[NFSV4_OPAQUELIMIT]; 3235 3236 /* 3237 * Check for restart conditions (client and server). 3238 */ 3239 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3240 &new_stp->ls_stateid, 0); 3241 if (error) 3242 goto out; 3243 3244 NFSLOCKSTATE(); 3245 /* 3246 * Get the open structure via clientid and stateid. 3247 */ 3248 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3249 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3250 if (!error) 3251 error = nfsrv_getstate(clp, &new_stp->ls_stateid, 3252 new_stp->ls_flags, &stp); 3253 3254 /* 3255 * Sanity check the open. 3256 */ 3257 if (!error && (!(stp->ls_flags & NFSLCK_OPEN) || 3258 (!(new_stp->ls_flags & NFSLCK_CONFIRM) && 3259 (stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) || 3260 ((new_stp->ls_flags & NFSLCK_CONFIRM) && 3261 (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM))))) 3262 error = NFSERR_BADSTATEID; 3263 3264 if (!error) 3265 error = nfsrv_checkseqid(nd, new_stp->ls_seq, 3266 stp->ls_openowner, new_stp->ls_op); 3267 if (!error && stp->ls_stateid.seqid != new_stp->ls_stateid.seqid && 3268 (((nd->nd_flag & ND_NFSV41) == 0 && 3269 !(new_stp->ls_flags & NFSLCK_CONFIRM)) || 3270 ((nd->nd_flag & ND_NFSV41) != 0 && 3271 new_stp->ls_stateid.seqid != 0))) 3272 error = NFSERR_OLDSTATEID; 3273 if (!error && vnode_vtype(vp) != VREG) { 3274 if (vnode_vtype(vp) == VDIR) 3275 error = NFSERR_ISDIR; 3276 else 3277 error = NFSERR_INVAL; 3278 } 3279 3280 if (error) { 3281 /* 3282 * If a client tries to confirm an Open with a bad 3283 * seqid# and there are no byte range locks or other Opens 3284 * on the openowner, just throw it away, so the next use of the 3285 * openowner will start a fresh seq#. 3286 */ 3287 if (error == NFSERR_BADSEQID && 3288 (new_stp->ls_flags & NFSLCK_CONFIRM) && 3289 nfsrv_nootherstate(stp)) 3290 nfsrv_freeopenowner(stp->ls_openowner, 0, p); 3291 NFSUNLOCKSTATE(); 3292 goto out; 3293 } 3294 3295 /* 3296 * Set the return stateid. 3297 */ 3298 stateidp->seqid = stp->ls_stateid.seqid + 1; 3299 if ((nd->nd_flag & ND_NFSV41) != 0 && stateidp->seqid == 0) 3300 stateidp->seqid = 1; 3301 stateidp->other[0] = stp->ls_stateid.other[0]; 3302 stateidp->other[1] = stp->ls_stateid.other[1]; 3303 stateidp->other[2] = stp->ls_stateid.other[2]; 3304 /* 3305 * Now, handle the three cases. 3306 */ 3307 if (new_stp->ls_flags & NFSLCK_CONFIRM) { 3308 /* 3309 * If the open doesn't need confirmation, it seems to me that 3310 * there is a client error, but I'll just log it and keep going? 3311 */ 3312 if (!(stp->ls_openowner->ls_flags & NFSLCK_NEEDSCONFIRM)) 3313 printf("Nfsv4d: stray open confirm\n"); 3314 stp->ls_openowner->ls_flags = 0; 3315 stp->ls_stateid.seqid++; 3316 if ((nd->nd_flag & ND_NFSV41) != 0 && 3317 stp->ls_stateid.seqid == 0) 3318 stp->ls_stateid.seqid = 1; 3319 if (!(clp->lc_flags & LCL_STAMPEDSTABLE)) { 3320 clp->lc_flags |= LCL_STAMPEDSTABLE; 3321 len = clp->lc_idlen; 3322 NFSBCOPY(clp->lc_id, client, len); 3323 gotstate = 1; 3324 } 3325 NFSUNLOCKSTATE(); 3326 } else if (new_stp->ls_flags & NFSLCK_CLOSE) { 3327 ownerstp = stp->ls_openowner; 3328 lfp = stp->ls_lfp; 3329 if (nfsrv_dolocallocks != 0 && !LIST_EMPTY(&stp->ls_open)) { 3330 /* Get the lf lock */ 3331 nfsrv_locklf(lfp); 3332 NFSUNLOCKSTATE(); 3333 ASSERT_VOP_ELOCKED(vp, "nfsrv_openupdate"); 3334 NFSVOPUNLOCK(vp, 0); 3335 if (nfsrv_freeopen(stp, vp, 1, p) == 0) { 3336 NFSLOCKSTATE(); 3337 nfsrv_unlocklf(lfp); 3338 NFSUNLOCKSTATE(); 3339 } 3340 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 3341 } else { 3342 (void) nfsrv_freeopen(stp, NULL, 0, p); 3343 NFSUNLOCKSTATE(); 3344 } 3345 } else { 3346 /* 3347 * Update the share bits, making sure that the new set are a 3348 * subset of the old ones. 3349 */ 3350 bits = (new_stp->ls_flags & NFSLCK_SHAREBITS); 3351 if (~(stp->ls_flags) & bits) { 3352 NFSUNLOCKSTATE(); 3353 error = NFSERR_INVAL; 3354 goto out; 3355 } 3356 stp->ls_flags = (bits | NFSLCK_OPEN); 3357 stp->ls_stateid.seqid++; 3358 if ((nd->nd_flag & ND_NFSV41) != 0 && 3359 stp->ls_stateid.seqid == 0) 3360 stp->ls_stateid.seqid = 1; 3361 NFSUNLOCKSTATE(); 3362 } 3363 3364 /* 3365 * If the client just confirmed its first open, write a timestamp 3366 * to the stable storage file. 3367 */ 3368 if (gotstate != 0) { 3369 nfsrv_writestable(client, len, NFSNST_NEWSTATE, p); 3370 nfsrv_backupstable(); 3371 } 3372 3373out: 3374 NFSEXITCODE2(error, nd); 3375 return (error); 3376} 3377 3378/* 3379 * Delegation update. Does the purge and return. 3380 */ 3381APPLESTATIC int 3382nfsrv_delegupdate(struct nfsrv_descript *nd, nfsquad_t clientid, 3383 nfsv4stateid_t *stateidp, vnode_t vp, int op, struct ucred *cred, 3384 NFSPROC_T *p) 3385{ 3386 struct nfsstate *stp; 3387 struct nfsclient *clp; 3388 int error = 0; 3389 fhandle_t fh; 3390 3391 /* 3392 * Do a sanity check against the file handle for DelegReturn. 3393 */ 3394 if (vp) { 3395 error = nfsvno_getfh(vp, &fh, p); 3396 if (error) 3397 goto out; 3398 } 3399 /* 3400 * Check for restart conditions (client and server). 3401 */ 3402 if (op == NFSV4OP_DELEGRETURN) 3403 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGRETURN, 3404 stateidp, 0); 3405 else 3406 error = nfsrv_checkrestart(clientid, NFSLCK_DELEGPURGE, 3407 stateidp, 0); 3408 3409 NFSLOCKSTATE(); 3410 /* 3411 * Get the open structure via clientid and stateid. 3412 */ 3413 if (!error) 3414 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3415 (nfsquad_t)((u_quad_t)0), 0, nd, p); 3416 if (error) { 3417 if (error == NFSERR_CBPATHDOWN) 3418 error = 0; 3419 if (error == NFSERR_STALECLIENTID && op == NFSV4OP_DELEGRETURN) 3420 error = NFSERR_STALESTATEID; 3421 } 3422 if (!error && op == NFSV4OP_DELEGRETURN) { 3423 error = nfsrv_getstate(clp, stateidp, NFSLCK_DELEGRETURN, &stp); 3424 if (!error && stp->ls_stateid.seqid != stateidp->seqid && 3425 ((nd->nd_flag & ND_NFSV41) == 0 || stateidp->seqid != 0)) 3426 error = NFSERR_OLDSTATEID; 3427 } 3428 /* 3429 * NFSERR_EXPIRED means that the state has gone away, 3430 * so Delegations have been purged. Just return ok. 3431 */ 3432 if (error == NFSERR_EXPIRED && op == NFSV4OP_DELEGPURGE) { 3433 NFSUNLOCKSTATE(); 3434 error = 0; 3435 goto out; 3436 } 3437 if (error) { 3438 NFSUNLOCKSTATE(); 3439 goto out; 3440 } 3441 3442 if (op == NFSV4OP_DELEGRETURN) { 3443 if (NFSBCMP((caddr_t)&fh, (caddr_t)&stp->ls_lfp->lf_fh, 3444 sizeof (fhandle_t))) { 3445 NFSUNLOCKSTATE(); 3446 error = NFSERR_BADSTATEID; 3447 goto out; 3448 } 3449 nfsrv_freedeleg(stp); 3450 } else { 3451 nfsrv_freedeleglist(&clp->lc_olddeleg); 3452 } 3453 NFSUNLOCKSTATE(); 3454 error = 0; 3455 3456out: 3457 NFSEXITCODE(error); 3458 return (error); 3459} 3460 3461/* 3462 * Release lock owner. 3463 */ 3464APPLESTATIC int 3465nfsrv_releaselckown(struct nfsstate *new_stp, nfsquad_t clientid, 3466 NFSPROC_T *p) 3467{ 3468 struct nfsstate *stp, *nstp, *openstp, *ownstp; 3469 struct nfsclient *clp; 3470 int error = 0; 3471 3472 /* 3473 * Check for restart conditions (client and server). 3474 */ 3475 error = nfsrv_checkrestart(clientid, new_stp->ls_flags, 3476 &new_stp->ls_stateid, 0); 3477 if (error) 3478 goto out; 3479 3480 NFSLOCKSTATE(); 3481 /* 3482 * Get the lock owner by name. 3483 */ 3484 error = nfsrv_getclient(clientid, CLOPS_RENEW, &clp, NULL, 3485 (nfsquad_t)((u_quad_t)0), 0, NULL, p); 3486 if (error) { 3487 NFSUNLOCKSTATE(); 3488 goto out; 3489 } 3490 LIST_FOREACH(ownstp, &clp->lc_open, ls_list) { 3491 LIST_FOREACH(openstp, &ownstp->ls_open, ls_list) { 3492 stp = LIST_FIRST(&openstp->ls_open); 3493 while (stp != LIST_END(&openstp->ls_open)) { 3494 nstp = LIST_NEXT(stp, ls_list); 3495 /* 3496 * If the owner matches, check for locks and 3497 * then free or return an error. 3498 */ 3499 if (stp->ls_ownerlen == new_stp->ls_ownerlen && 3500 !NFSBCMP(stp->ls_owner, new_stp->ls_owner, 3501 stp->ls_ownerlen)){ 3502 if (LIST_EMPTY(&stp->ls_lock)) { 3503 nfsrv_freelockowner(stp, NULL, 0, p); 3504 } else { 3505 NFSUNLOCKSTATE(); 3506 error = NFSERR_LOCKSHELD; 3507 goto out; 3508 } 3509 } 3510 stp = nstp; 3511 } 3512 } 3513 } 3514 NFSUNLOCKSTATE(); 3515 3516out: 3517 NFSEXITCODE(error); 3518 return (error); 3519} 3520 3521/* 3522 * Get the file handle for a lock structure. 3523 */ 3524static int 3525nfsrv_getlockfh(vnode_t vp, u_short flags, struct nfslockfile *new_lfp, 3526 fhandle_t *nfhp, NFSPROC_T *p) 3527{ 3528 fhandle_t *fhp = NULL; 3529 int error; 3530 3531 /* 3532 * For lock, use the new nfslock structure, otherwise just 3533 * a fhandle_t on the stack. 3534 */ 3535 if (flags & NFSLCK_OPEN) { 3536 KASSERT(new_lfp != NULL, ("nfsrv_getlockfh: new_lfp NULL")); 3537 fhp = &new_lfp->lf_fh; 3538 } else if (nfhp) { 3539 fhp = nfhp; 3540 } else { 3541 panic("nfsrv_getlockfh"); 3542 } 3543 error = nfsvno_getfh(vp, fhp, p); 3544 NFSEXITCODE(error); 3545 return (error); 3546} 3547 3548/* 3549 * Get an nfs lock structure. Allocate one, as required, and return a 3550 * pointer to it. 3551 * Returns an NFSERR_xxx upon failure or -1 to indicate no current lock. 3552 */ 3553static int 3554nfsrv_getlockfile(u_short flags, struct nfslockfile **new_lfpp, 3555 struct nfslockfile **lfpp, fhandle_t *nfhp, int lockit) 3556{ 3557 struct nfslockfile *lfp; 3558 fhandle_t *fhp = NULL, *tfhp; 3559 struct nfslockhashhead *hp; 3560 struct nfslockfile *new_lfp = NULL; 3561 3562 /* 3563 * For lock, use the new nfslock structure, otherwise just 3564 * a fhandle_t on the stack. 3565 */ 3566 if (flags & NFSLCK_OPEN) { 3567 new_lfp = *new_lfpp; 3568 fhp = &new_lfp->lf_fh; 3569 } else if (nfhp) { 3570 fhp = nfhp; 3571 } else { 3572 panic("nfsrv_getlockfile"); 3573 } 3574 3575 hp = NFSLOCKHASH(fhp); 3576 LIST_FOREACH(lfp, hp, lf_hash) { 3577 tfhp = &lfp->lf_fh; 3578 if (NFSVNO_CMPFH(fhp, tfhp)) { 3579 if (lockit) 3580 nfsrv_locklf(lfp); 3581 *lfpp = lfp; 3582 return (0); 3583 } 3584 } 3585 if (!(flags & NFSLCK_OPEN)) 3586 return (-1); 3587 3588 /* 3589 * No match, so chain the new one into the list. 3590 */ 3591 LIST_INIT(&new_lfp->lf_open); 3592 LIST_INIT(&new_lfp->lf_lock); 3593 LIST_INIT(&new_lfp->lf_deleg); 3594 LIST_INIT(&new_lfp->lf_locallock); 3595 LIST_INIT(&new_lfp->lf_rollback); 3596 new_lfp->lf_locallock_lck.nfslock_usecnt = 0; 3597 new_lfp->lf_locallock_lck.nfslock_lock = 0; 3598 new_lfp->lf_usecount = 0; 3599 LIST_INSERT_HEAD(hp, new_lfp, lf_hash); 3600 *lfpp = new_lfp; 3601 *new_lfpp = NULL; 3602 return (0); 3603} 3604 3605/* 3606 * This function adds a nfslock lock structure to the list for the associated 3607 * nfsstate and nfslockfile structures. It will be inserted after the 3608 * entry pointed at by insert_lop. 3609 */ 3610static void 3611nfsrv_insertlock(struct nfslock *new_lop, struct nfslock *insert_lop, 3612 struct nfsstate *stp, struct nfslockfile *lfp) 3613{ 3614 struct nfslock *lop, *nlop; 3615 3616 new_lop->lo_stp = stp; 3617 new_lop->lo_lfp = lfp; 3618 3619 if (stp != NULL) { 3620 /* Insert in increasing lo_first order */ 3621 lop = LIST_FIRST(&lfp->lf_lock); 3622 if (lop == LIST_END(&lfp->lf_lock) || 3623 new_lop->lo_first <= lop->lo_first) { 3624 LIST_INSERT_HEAD(&lfp->lf_lock, new_lop, lo_lckfile); 3625 } else { 3626 nlop = LIST_NEXT(lop, lo_lckfile); 3627 while (nlop != LIST_END(&lfp->lf_lock) && 3628 nlop->lo_first < new_lop->lo_first) { 3629 lop = nlop; 3630 nlop = LIST_NEXT(lop, lo_lckfile); 3631 } 3632 LIST_INSERT_AFTER(lop, new_lop, lo_lckfile); 3633 } 3634 } else { 3635 new_lop->lo_lckfile.le_prev = NULL; /* list not used */ 3636 } 3637 3638 /* 3639 * Insert after insert_lop, which is overloaded as stp or lfp for 3640 * an empty list. 3641 */ 3642 if (stp == NULL && (struct nfslockfile *)insert_lop == lfp) 3643 LIST_INSERT_HEAD(&lfp->lf_locallock, new_lop, lo_lckowner); 3644 else if ((struct nfsstate *)insert_lop == stp) 3645 LIST_INSERT_HEAD(&stp->ls_lock, new_lop, lo_lckowner); 3646 else 3647 LIST_INSERT_AFTER(insert_lop, new_lop, lo_lckowner); 3648 if (stp != NULL) { 3649 newnfsstats.srvlocks++; 3650 nfsrv_openpluslock++; 3651 } 3652} 3653 3654/* 3655 * This function updates the locking for a lock owner and given file. It 3656 * maintains a list of lock ranges ordered on increasing file offset that 3657 * are NFSLCK_READ or NFSLCK_WRITE and non-overlapping (aka POSIX style). 3658 * It always adds new_lop to the list and sometimes uses the one pointed 3659 * at by other_lopp. 3660 */ 3661static void 3662nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp, 3663 struct nfslock **other_lopp, struct nfslockfile *lfp) 3664{ 3665 struct nfslock *new_lop = *new_lopp; 3666 struct nfslock *lop, *tlop, *ilop; 3667 struct nfslock *other_lop = *other_lopp; 3668 int unlock = 0, myfile = 0; 3669 u_int64_t tmp; 3670 3671 /* 3672 * Work down the list until the lock is merged. 3673 */ 3674 if (new_lop->lo_flags & NFSLCK_UNLOCK) 3675 unlock = 1; 3676 if (stp != NULL) { 3677 ilop = (struct nfslock *)stp; 3678 lop = LIST_FIRST(&stp->ls_lock); 3679 } else { 3680 ilop = (struct nfslock *)lfp; 3681 lop = LIST_FIRST(&lfp->lf_locallock); 3682 } 3683 while (lop != NULL) { 3684 /* 3685 * Only check locks for this file that aren't before the start of 3686 * new lock's range. 3687 */ 3688 if (lop->lo_lfp == lfp) { 3689 myfile = 1; 3690 if (lop->lo_end >= new_lop->lo_first) { 3691 if (new_lop->lo_end < lop->lo_first) { 3692 /* 3693 * If the new lock ends before the start of the 3694 * current lock's range, no merge, just insert 3695 * the new lock. 3696 */ 3697 break; 3698 } 3699 if (new_lop->lo_flags == lop->lo_flags || 3700 (new_lop->lo_first <= lop->lo_first && 3701 new_lop->lo_end >= lop->lo_end)) { 3702 /* 3703 * This lock can be absorbed by the new lock/unlock. 3704 * This happens when it covers the entire range 3705 * of the old lock or is contiguous 3706 * with the old lock and is of the same type or an 3707 * unlock. 3708 */ 3709 if (lop->lo_first < new_lop->lo_first) 3710 new_lop->lo_first = lop->lo_first; 3711 if (lop->lo_end > new_lop->lo_end) 3712 new_lop->lo_end = lop->lo_end; 3713 tlop = lop; 3714 lop = LIST_NEXT(lop, lo_lckowner); 3715 nfsrv_freenfslock(tlop); 3716 continue; 3717 } 3718 3719 /* 3720 * All these cases are for contiguous locks that are not the 3721 * same type, so they can't be merged. 3722 */ 3723 if (new_lop->lo_first <= lop->lo_first) { 3724 /* 3725 * This case is where the new lock overlaps with the 3726 * first part of the old lock. Move the start of the 3727 * old lock to just past the end of the new lock. The 3728 * new lock will be inserted in front of the old, since 3729 * ilop hasn't been updated. (We are done now.) 3730 */ 3731 lop->lo_first = new_lop->lo_end; 3732 break; 3733 } 3734 if (new_lop->lo_end >= lop->lo_end) { 3735 /* 3736 * This case is where the new lock overlaps with the 3737 * end of the old lock's range. Move the old lock's 3738 * end to just before the new lock's first and insert 3739 * the new lock after the old lock. 3740 * Might not be done yet, since the new lock could 3741 * overlap further locks with higher ranges. 3742 */ 3743 lop->lo_end = new_lop->lo_first; 3744 ilop = lop; 3745 lop = LIST_NEXT(lop, lo_lckowner); 3746 continue; 3747 } 3748 /* 3749 * The final case is where the new lock's range is in the 3750 * middle of the current lock's and splits the current lock 3751 * up. Use *other_lopp to handle the second part of the 3752 * split old lock range. (We are done now.) 3753 * For unlock, we use new_lop as other_lop and tmp, since 3754 * other_lop and new_lop are the same for this case. 3755 * We noted the unlock case above, so we don't need 3756 * new_lop->lo_flags any longer. 3757 */ 3758 tmp = new_lop->lo_first; 3759 if (other_lop == NULL) { 3760 if (!unlock) 3761 panic("nfsd srv update unlock"); 3762 other_lop = new_lop; 3763 *new_lopp = NULL; 3764 } 3765 other_lop->lo_first = new_lop->lo_end; 3766 other_lop->lo_end = lop->lo_end; 3767 other_lop->lo_flags = lop->lo_flags; 3768 other_lop->lo_stp = stp; 3769 other_lop->lo_lfp = lfp; 3770 lop->lo_end = tmp; 3771 nfsrv_insertlock(other_lop, lop, stp, lfp); 3772 *other_lopp = NULL; 3773 ilop = lop; 3774 break; 3775 } 3776 } 3777 ilop = lop; 3778 lop = LIST_NEXT(lop, lo_lckowner); 3779 if (myfile && (lop == NULL || lop->lo_lfp != lfp)) 3780 break; 3781 } 3782 3783 /* 3784 * Insert the new lock in the list at the appropriate place. 3785 */ 3786 if (!unlock) { 3787 nfsrv_insertlock(new_lop, ilop, stp, lfp); 3788 *new_lopp = NULL; 3789 } 3790} 3791 3792/* 3793 * This function handles sequencing of locks, etc. 3794 * It returns an error that indicates what the caller should do. 3795 */ 3796static int 3797nfsrv_checkseqid(struct nfsrv_descript *nd, u_int32_t seqid, 3798 struct nfsstate *stp, struct nfsrvcache *op) 3799{ 3800 int error = 0; 3801 3802 if ((nd->nd_flag & ND_NFSV41) != 0) 3803 /* NFSv4.1 ignores the open_seqid and lock_seqid. */ 3804 goto out; 3805 if (op != nd->nd_rp) 3806 panic("nfsrvstate checkseqid"); 3807 if (!(op->rc_flag & RC_INPROG)) 3808 panic("nfsrvstate not inprog"); 3809 if (stp->ls_op && stp->ls_op->rc_refcnt <= 0) { 3810 printf("refcnt=%d\n", stp->ls_op->rc_refcnt); 3811 panic("nfsrvstate op refcnt"); 3812 } 3813 if ((stp->ls_seq + 1) == seqid) { 3814 if (stp->ls_op) 3815 nfsrvd_derefcache(stp->ls_op); 3816 stp->ls_op = op; 3817 nfsrvd_refcache(op); 3818 stp->ls_seq = seqid; 3819 goto out; 3820 } else if (stp->ls_seq == seqid && stp->ls_op && 3821 op->rc_xid == stp->ls_op->rc_xid && 3822 op->rc_refcnt == 0 && 3823 op->rc_reqlen == stp->ls_op->rc_reqlen && 3824 op->rc_cksum == stp->ls_op->rc_cksum) { 3825 if (stp->ls_op->rc_flag & RC_INPROG) { 3826 error = NFSERR_DONTREPLY; 3827 goto out; 3828 } 3829 nd->nd_rp = stp->ls_op; 3830 nd->nd_rp->rc_flag |= RC_INPROG; 3831 nfsrvd_delcache(op); 3832 error = NFSERR_REPLYFROMCACHE; 3833 goto out; 3834 } 3835 error = NFSERR_BADSEQID; 3836 3837out: 3838 NFSEXITCODE2(error, nd); 3839 return (error); 3840} 3841 3842/* 3843 * Get the client ip address for callbacks. If the strings can't be parsed, 3844 * just set lc_program to 0 to indicate no callbacks are possible. 3845 * (For cases where the address can't be parsed or is 0.0.0.0.0.0, set 3846 * the address to the client's transport address. This won't be used 3847 * for callbacks, but can be printed out by newnfsstats for info.) 3848 * Return error if the xdr can't be parsed, 0 otherwise. 3849 */ 3850APPLESTATIC int 3851nfsrv_getclientipaddr(struct nfsrv_descript *nd, struct nfsclient *clp) 3852{ 3853 u_int32_t *tl; 3854 u_char *cp, *cp2; 3855 int i, j; 3856 struct sockaddr_in *rad, *sad; 3857 u_char protocol[5], addr[24]; 3858 int error = 0, cantparse = 0; 3859 union { 3860 u_long ival; 3861 u_char cval[4]; 3862 } ip; 3863 union { 3864 u_short sval; 3865 u_char cval[2]; 3866 } port; 3867 3868 rad = NFSSOCKADDR(clp->lc_req.nr_nam, struct sockaddr_in *); 3869 rad->sin_family = AF_INET; 3870 rad->sin_len = sizeof (struct sockaddr_in); 3871 rad->sin_addr.s_addr = 0; 3872 rad->sin_port = 0; 3873 clp->lc_req.nr_client = NULL; 3874 clp->lc_req.nr_lock = 0; 3875 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3876 i = fxdr_unsigned(int, *tl); 3877 if (i >= 3 && i <= 4) { 3878 error = nfsrv_mtostr(nd, protocol, i); 3879 if (error) 3880 goto nfsmout; 3881 if (!strcmp(protocol, "tcp")) { 3882 clp->lc_flags |= LCL_TCPCALLBACK; 3883 clp->lc_req.nr_sotype = SOCK_STREAM; 3884 clp->lc_req.nr_soproto = IPPROTO_TCP; 3885 } else if (!strcmp(protocol, "udp")) { 3886 clp->lc_req.nr_sotype = SOCK_DGRAM; 3887 clp->lc_req.nr_soproto = IPPROTO_UDP; 3888 } else { 3889 cantparse = 1; 3890 } 3891 } else { 3892 cantparse = 1; 3893 if (i > 0) { 3894 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3895 if (error) 3896 goto nfsmout; 3897 } 3898 } 3899 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3900 i = fxdr_unsigned(int, *tl); 3901 if (i < 0) { 3902 error = NFSERR_BADXDR; 3903 goto nfsmout; 3904 } else if (i == 0) { 3905 cantparse = 1; 3906 } else if (!cantparse && i <= 23 && i >= 11) { 3907 error = nfsrv_mtostr(nd, addr, i); 3908 if (error) 3909 goto nfsmout; 3910 3911 /* 3912 * Parse out the address fields. We expect 6 decimal numbers 3913 * separated by '.'s. 3914 */ 3915 cp = addr; 3916 i = 0; 3917 while (*cp && i < 6) { 3918 cp2 = cp; 3919 while (*cp2 && *cp2 != '.') 3920 cp2++; 3921 if (*cp2) 3922 *cp2++ = '\0'; 3923 else if (i != 5) { 3924 cantparse = 1; 3925 break; 3926 } 3927 j = nfsrv_getipnumber(cp); 3928 if (j >= 0) { 3929 if (i < 4) 3930 ip.cval[3 - i] = j; 3931 else 3932 port.cval[5 - i] = j; 3933 } else { 3934 cantparse = 1; 3935 break; 3936 } 3937 cp = cp2; 3938 i++; 3939 } 3940 if (!cantparse) { 3941 if (ip.ival != 0x0) { 3942 rad->sin_addr.s_addr = htonl(ip.ival); 3943 rad->sin_port = htons(port.sval); 3944 } else { 3945 cantparse = 1; 3946 } 3947 } 3948 } else { 3949 cantparse = 1; 3950 if (i > 0) { 3951 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3952 if (error) 3953 goto nfsmout; 3954 } 3955 } 3956 if (cantparse) { 3957 sad = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3958 rad->sin_addr.s_addr = sad->sin_addr.s_addr; 3959 rad->sin_port = 0x0; 3960 clp->lc_program = 0; 3961 } 3962nfsmout: 3963 NFSEXITCODE2(error, nd); 3964 return (error); 3965} 3966 3967/* 3968 * Turn a string of up to three decimal digits into a number. Return -1 upon 3969 * error. 3970 */ 3971static int 3972nfsrv_getipnumber(u_char *cp) 3973{ 3974 int i = 0, j = 0; 3975 3976 while (*cp) { 3977 if (j > 2 || *cp < '0' || *cp > '9') 3978 return (-1); 3979 i *= 10; 3980 i += (*cp - '0'); 3981 cp++; 3982 j++; 3983 } 3984 if (i < 256) 3985 return (i); 3986 return (-1); 3987} 3988 3989/* 3990 * This function checks for restart conditions. 3991 */ 3992static int 3993nfsrv_checkrestart(nfsquad_t clientid, u_int32_t flags, 3994 nfsv4stateid_t *stateidp, int specialid) 3995{ 3996 int ret = 0; 3997 3998 /* 3999 * First check for a server restart. Open, LockT, ReleaseLockOwner 4000 * and DelegPurge have a clientid, the rest a stateid. 4001 */ 4002 if (flags & 4003 (NFSLCK_OPEN | NFSLCK_TEST | NFSLCK_RELEASE | NFSLCK_DELEGPURGE)) { 4004 if (clientid.lval[0] != nfsrvboottime) { 4005 ret = NFSERR_STALECLIENTID; 4006 goto out; 4007 } 4008 } else if (stateidp->other[0] != nfsrvboottime && 4009 specialid == 0) { 4010 ret = NFSERR_STALESTATEID; 4011 goto out; 4012 } 4013 4014 /* 4015 * Read, Write, Setattr and LockT can return NFSERR_GRACE and do 4016 * not use a lock/open owner seqid#, so the check can be done now. 4017 * (The others will be checked, as required, later.) 4018 */ 4019 if (!(flags & (NFSLCK_CHECK | NFSLCK_TEST))) 4020 goto out; 4021 4022 NFSLOCKSTATE(); 4023 ret = nfsrv_checkgrace(NULL, NULL, flags); 4024 NFSUNLOCKSTATE(); 4025 4026out: 4027 NFSEXITCODE(ret); 4028 return (ret); 4029} 4030 4031/* 4032 * Check for grace. 4033 */ 4034static int 4035nfsrv_checkgrace(struct nfsrv_descript *nd, struct nfsclient *clp, 4036 u_int32_t flags) 4037{ 4038 int error = 0; 4039 4040 if ((nfsrv_stablefirst.nsf_flags & NFSNSF_GRACEOVER) != 0) { 4041 if (flags & NFSLCK_RECLAIM) { 4042 error = NFSERR_NOGRACE; 4043 goto out; 4044 } 4045 } else { 4046 if (!(flags & NFSLCK_RECLAIM)) { 4047 error = NFSERR_GRACE; 4048 goto out; 4049 } 4050 if (nd != NULL && clp != NULL && 4051 (nd->nd_flag & ND_NFSV41) != 0 && 4052 (clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) { 4053 error = NFSERR_NOGRACE; 4054 goto out; 4055 } 4056 4057 /* 4058 * If grace is almost over and we are still getting Reclaims, 4059 * extend grace a bit. 4060 */ 4061 if ((NFSD_MONOSEC + NFSRV_LEASEDELTA) > 4062 nfsrv_stablefirst.nsf_eograce) 4063 nfsrv_stablefirst.nsf_eograce = NFSD_MONOSEC + 4064 NFSRV_LEASEDELTA; 4065 } 4066 4067out: 4068 NFSEXITCODE(error); 4069 return (error); 4070} 4071 4072/* 4073 * Do a server callback. 4074 */ 4075static int 4076nfsrv_docallback(struct nfsclient *clp, int procnum, 4077 nfsv4stateid_t *stateidp, int trunc, fhandle_t *fhp, 4078 struct nfsvattr *nap, nfsattrbit_t *attrbitp, NFSPROC_T *p) 4079{ 4080 mbuf_t m; 4081 u_int32_t *tl; 4082 struct nfsrv_descript nfsd, *nd = &nfsd; 4083 struct ucred *cred; 4084 int error = 0; 4085 u_int32_t callback; 4086 struct nfsdsession *sep = NULL; 4087 4088 cred = newnfs_getcred(); 4089 NFSLOCKSTATE(); /* mostly for lc_cbref++ */ 4090 if (clp->lc_flags & LCL_NEEDSCONFIRM) { 4091 NFSUNLOCKSTATE(); 4092 panic("docallb"); 4093 } 4094 clp->lc_cbref++; 4095 4096 /* 4097 * Fill the callback program# and version into the request 4098 * structure for newnfs_connect() to use. 4099 */ 4100 clp->lc_req.nr_prog = clp->lc_program; 4101#ifdef notnow 4102 if ((clp->lc_flags & LCL_NFSV41) != 0) 4103 clp->lc_req.nr_vers = NFSV41_CBVERS; 4104 else 4105#endif 4106 clp->lc_req.nr_vers = NFSV4_CBVERS; 4107 4108 /* 4109 * First, fill in some of the fields of nd and cr. 4110 */ 4111 nd->nd_flag = ND_NFSV4; 4112 if (clp->lc_flags & LCL_GSS) 4113 nd->nd_flag |= ND_KERBV; 4114 if ((clp->lc_flags & LCL_NFSV41) != 0) 4115 nd->nd_flag |= ND_NFSV41; 4116 nd->nd_repstat = 0; 4117 cred->cr_uid = clp->lc_uid; 4118 cred->cr_gid = clp->lc_gid; 4119 callback = clp->lc_callback; 4120 NFSUNLOCKSTATE(); 4121 cred->cr_ngroups = 1; 4122 4123 /* 4124 * Get the first mbuf for the request. 4125 */ 4126 MGET(m, M_WAITOK, MT_DATA); 4127 mbuf_setlen(m, 0); 4128 nd->nd_mreq = nd->nd_mb = m; 4129 nd->nd_bpos = NFSMTOD(m, caddr_t); 4130 4131 /* 4132 * and build the callback request. 4133 */ 4134 if (procnum == NFSV4OP_CBGETATTR) { 4135 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4136 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBGETATTR, 4137 "CB Getattr", &sep); 4138 if (error != 0) { 4139 mbuf_freem(nd->nd_mreq); 4140 goto errout; 4141 } 4142 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4143 (void)nfsrv_putattrbit(nd, attrbitp); 4144 } else if (procnum == NFSV4OP_CBRECALL) { 4145 nd->nd_procnum = NFSV4PROC_CBCOMPOUND; 4146 error = nfsrv_cbcallargs(nd, clp, callback, NFSV4OP_CBRECALL, 4147 "CB Recall", &sep); 4148 if (error != 0) { 4149 mbuf_freem(nd->nd_mreq); 4150 goto errout; 4151 } 4152 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID); 4153 *tl++ = txdr_unsigned(stateidp->seqid); 4154 NFSBCOPY((caddr_t)stateidp->other, (caddr_t)tl, 4155 NFSX_STATEIDOTHER); 4156 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED); 4157 if (trunc) 4158 *tl = newnfs_true; 4159 else 4160 *tl = newnfs_false; 4161 (void)nfsm_fhtom(nd, (u_int8_t *)fhp, NFSX_MYFH, 0); 4162 } else if (procnum == NFSV4PROC_CBNULL) { 4163 nd->nd_procnum = NFSV4PROC_CBNULL; 4164 if ((clp->lc_flags & LCL_NFSV41) != 0) { 4165 error = nfsv4_getcbsession(clp, &sep); 4166 if (error != 0) { 4167 mbuf_freem(nd->nd_mreq); 4168 goto errout; 4169 } 4170 } 4171 } else { 4172 error = NFSERR_SERVERFAULT; 4173 mbuf_freem(nd->nd_mreq); 4174 goto errout; 4175 } 4176 4177 /* 4178 * Call newnfs_connect(), as required, and then newnfs_request(). 4179 */ 4180 (void) newnfs_sndlock(&clp->lc_req.nr_lock); 4181 if (clp->lc_req.nr_client == NULL) { 4182 if ((clp->lc_flags & LCL_NFSV41) != 0) 4183 error = ECONNREFUSED; 4184 else if (nd->nd_procnum == NFSV4PROC_CBNULL) 4185 error = newnfs_connect(NULL, &clp->lc_req, cred, 4186 NULL, 1); 4187 else 4188 error = newnfs_connect(NULL, &clp->lc_req, cred, 4189 NULL, 3); 4190 } 4191 newnfs_sndunlock(&clp->lc_req.nr_lock); 4192 if (!error) { 4193 if ((nd->nd_flag & ND_NFSV41) != 0) { 4194 KASSERT(sep != NULL, ("sep NULL")); 4195 if (sep->sess_cbsess.nfsess_xprt != NULL) 4196 error = newnfs_request(nd, NULL, clp, 4197 &clp->lc_req, NULL, NULL, cred, 4198 clp->lc_program, clp->lc_req.nr_vers, NULL, 4199 1, NULL, &sep->sess_cbsess); 4200 else { 4201 /* 4202 * This should probably never occur, but if a 4203 * client somehow does an RPC without a 4204 * SequenceID Op that causes a callback just 4205 * after the nfsd threads have been terminated 4206 * and restared we could conceivably get here 4207 * without a backchannel xprt. 4208 */ 4209 printf("nfsrv_docallback: no xprt\n"); 4210 error = ECONNREFUSED; 4211 } 4212 nfsrv_freesession(sep, NULL); 4213 } else 4214 error = newnfs_request(nd, NULL, clp, &clp->lc_req, 4215 NULL, NULL, cred, clp->lc_program, 4216 clp->lc_req.nr_vers, NULL, 1, NULL, NULL); 4217 } 4218errout: 4219 NFSFREECRED(cred); 4220 4221 /* 4222 * If error is set here, the Callback path isn't working 4223 * properly, so twiddle the appropriate LCL_ flags. 4224 * (nd_repstat != 0 indicates the Callback path is working, 4225 * but the callback failed on the client.) 4226 */ 4227 if (error) { 4228 /* 4229 * Mark the callback pathway down, which disabled issuing 4230 * of delegations and gets Renew to return NFSERR_CBPATHDOWN. 4231 */ 4232 NFSLOCKSTATE(); 4233 clp->lc_flags |= LCL_CBDOWN; 4234 NFSUNLOCKSTATE(); 4235 } else { 4236 /* 4237 * Callback worked. If the callback path was down, disable 4238 * callbacks, so no more delegations will be issued. (This 4239 * is done on the assumption that the callback pathway is 4240 * flakey.) 4241 */ 4242 NFSLOCKSTATE(); 4243 if (clp->lc_flags & LCL_CBDOWN) 4244 clp->lc_flags &= ~(LCL_CBDOWN | LCL_CALLBACKSON); 4245 NFSUNLOCKSTATE(); 4246 if (nd->nd_repstat) 4247 error = nd->nd_repstat; 4248 else if (error == 0 && procnum == NFSV4OP_CBGETATTR) 4249 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 4250 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 4251 p, NULL); 4252 mbuf_freem(nd->nd_mrep); 4253 } 4254 NFSLOCKSTATE(); 4255 clp->lc_cbref--; 4256 if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { 4257 clp->lc_flags &= ~LCL_WAKEUPWANTED; 4258 wakeup(clp); 4259 } 4260 NFSUNLOCKSTATE(); 4261 4262 NFSEXITCODE(error); 4263 return (error); 4264} 4265 4266/* 4267 * Set up the compound RPC for the callback. 4268 */ 4269static int 4270nfsrv_cbcallargs(struct nfsrv_descript *nd, struct nfsclient *clp, 4271 uint32_t callback, int op, const char *optag, struct nfsdsession **sepp) 4272{ 4273 uint32_t *tl; 4274 int error, len; 4275 4276 len = strlen(optag); 4277 (void)nfsm_strtom(nd, optag, len); 4278 NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED); 4279 if ((nd->nd_flag & ND_NFSV41) != 0) { 4280 *tl++ = txdr_unsigned(NFSV41_MINORVERSION); 4281 *tl++ = txdr_unsigned(callback); 4282 *tl++ = txdr_unsigned(2); 4283 *tl = txdr_unsigned(NFSV4OP_CBSEQUENCE); 4284 error = nfsv4_setcbsequence(nd, clp, 1, sepp); 4285 if (error != 0) 4286 return (error); 4287 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 4288 *tl = txdr_unsigned(op); 4289 } else { 4290 *tl++ = txdr_unsigned(NFSV4_MINORVERSION); 4291 *tl++ = txdr_unsigned(callback); 4292 *tl++ = txdr_unsigned(1); 4293 *tl = txdr_unsigned(op); 4294 } 4295 return (0); 4296} 4297 4298/* 4299 * Return the next index# for a clientid. Mostly just increment and return 4300 * the next one, but... if the 32bit unsigned does actually wrap around, 4301 * it should be rebooted. 4302 * At an average rate of one new client per second, it will wrap around in 4303 * approximately 136 years. (I think the server will have been shut 4304 * down or rebooted before then.) 4305 */ 4306static u_int32_t 4307nfsrv_nextclientindex(void) 4308{ 4309 static u_int32_t client_index = 0; 4310 4311 client_index++; 4312 if (client_index != 0) 4313 return (client_index); 4314 4315 printf("%s: out of clientids\n", __func__); 4316 return (client_index); 4317} 4318 4319/* 4320 * Return the next index# for a stateid. Mostly just increment and return 4321 * the next one, but... if the 32bit unsigned does actually wrap around 4322 * (will a BSD server stay up that long?), find 4323 * new start and end values. 4324 */ 4325static u_int32_t 4326nfsrv_nextstateindex(struct nfsclient *clp) 4327{ 4328 struct nfsstate *stp; 4329 int i; 4330 u_int32_t canuse, min_index, max_index; 4331 4332 if (!(clp->lc_flags & LCL_INDEXNOTOK)) { 4333 clp->lc_stateindex++; 4334 if (clp->lc_stateindex != clp->lc_statemaxindex) 4335 return (clp->lc_stateindex); 4336 } 4337 4338 /* 4339 * Yuck, we've hit the end. 4340 * Look for a new min and max. 4341 */ 4342 min_index = 0; 4343 max_index = 0xffffffff; 4344 for (i = 0; i < nfsrv_statehashsize; i++) { 4345 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4346 if (stp->ls_stateid.other[2] > 0x80000000) { 4347 if (stp->ls_stateid.other[2] < max_index) 4348 max_index = stp->ls_stateid.other[2]; 4349 } else { 4350 if (stp->ls_stateid.other[2] > min_index) 4351 min_index = stp->ls_stateid.other[2]; 4352 } 4353 } 4354 } 4355 4356 /* 4357 * Yikes, highly unlikely, but I'll handle it anyhow. 4358 */ 4359 if (min_index == 0x80000000 && max_index == 0x80000001) { 4360 canuse = 0; 4361 /* 4362 * Loop around until we find an unused entry. Return that 4363 * and set LCL_INDEXNOTOK, so the search will continue next time. 4364 * (This is one of those rare cases where a goto is the 4365 * cleanest way to code the loop.) 4366 */ 4367tryagain: 4368 for (i = 0; i < nfsrv_statehashsize; i++) { 4369 LIST_FOREACH(stp, &clp->lc_stateid[i], ls_hash) { 4370 if (stp->ls_stateid.other[2] == canuse) { 4371 canuse++; 4372 goto tryagain; 4373 } 4374 } 4375 } 4376 clp->lc_flags |= LCL_INDEXNOTOK; 4377 return (canuse); 4378 } 4379 4380 /* 4381 * Ok to start again from min + 1. 4382 */ 4383 clp->lc_stateindex = min_index + 1; 4384 clp->lc_statemaxindex = max_index; 4385 clp->lc_flags &= ~LCL_INDEXNOTOK; 4386 return (clp->lc_stateindex); 4387} 4388 4389/* 4390 * The following functions handle the stable storage file that deals with 4391 * the edge conditions described in RFC3530 Sec. 8.6.3. 4392 * The file is as follows: 4393 * - a single record at the beginning that has the lease time of the 4394 * previous server instance (before the last reboot) and the nfsrvboottime 4395 * values for the previous server boots. 4396 * These previous boot times are used to ensure that the current 4397 * nfsrvboottime does not, somehow, get set to a previous one. 4398 * (This is important so that Stale ClientIDs and StateIDs can 4399 * be recognized.) 4400 * The number of previous nfsvrboottime values preceeds the list. 4401 * - followed by some number of appended records with: 4402 * - client id string 4403 * - flag that indicates it is a record revoking state via lease 4404 * expiration or similar 4405 * OR has successfully acquired state. 4406 * These structures vary in length, with the client string at the end, up 4407 * to NFSV4_OPAQUELIMIT in size. 4408 * 4409 * At the end of the grace period, the file is truncated, the first 4410 * record is rewritten with updated information and any acquired state 4411 * records for successful reclaims of state are written. 4412 * 4413 * Subsequent records are appended when the first state is issued to 4414 * a client and when state is revoked for a client. 4415 * 4416 * When reading the file in, state issued records that come later in 4417 * the file override older ones, since the append log is in cronological order. 4418 * If, for some reason, the file can't be read, the grace period is 4419 * immediately terminated and all reclaims get NFSERR_NOGRACE. 4420 */ 4421 4422/* 4423 * Read in the stable storage file. Called by nfssvc() before the nfsd 4424 * processes start servicing requests. 4425 */ 4426APPLESTATIC void 4427nfsrv_setupstable(NFSPROC_T *p) 4428{ 4429 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4430 struct nfsrv_stable *sp, *nsp; 4431 struct nfst_rec *tsp; 4432 int error, i, tryagain; 4433 off_t off = 0; 4434 ssize_t aresid, len; 4435 4436 /* 4437 * If NFSNSF_UPDATEDONE is set, this is a restart of the nfsds without 4438 * a reboot, so state has not been lost. 4439 */ 4440 if (sf->nsf_flags & NFSNSF_UPDATEDONE) 4441 return; 4442 /* 4443 * Set Grace over just until the file reads successfully. 4444 */ 4445 nfsrvboottime = time_second; 4446 LIST_INIT(&sf->nsf_head); 4447 sf->nsf_flags = (NFSNSF_GRACEOVER | NFSNSF_NEEDLOCK); 4448 sf->nsf_eograce = NFSD_MONOSEC + NFSRV_LEASEDELTA; 4449 if (sf->nsf_fp == NULL) 4450 return; 4451 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4452 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), off, UIO_SYSSPACE, 4453 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4454 if (error || aresid || sf->nsf_numboots == 0 || 4455 sf->nsf_numboots > NFSNSF_MAXNUMBOOTS) 4456 return; 4457 4458 /* 4459 * Now, read in the boottimes. 4460 */ 4461 sf->nsf_bootvals = (time_t *)malloc((sf->nsf_numboots + 1) * 4462 sizeof (time_t), M_TEMP, M_WAITOK); 4463 off = sizeof (struct nfsf_rec); 4464 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4465 (caddr_t)sf->nsf_bootvals, sf->nsf_numboots * sizeof (time_t), off, 4466 UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4467 if (error || aresid) { 4468 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4469 sf->nsf_bootvals = NULL; 4470 return; 4471 } 4472 4473 /* 4474 * Make sure this nfsrvboottime is different from all recorded 4475 * previous ones. 4476 */ 4477 do { 4478 tryagain = 0; 4479 for (i = 0; i < sf->nsf_numboots; i++) { 4480 if (nfsrvboottime == sf->nsf_bootvals[i]) { 4481 nfsrvboottime++; 4482 tryagain = 1; 4483 break; 4484 } 4485 } 4486 } while (tryagain); 4487 4488 sf->nsf_flags |= NFSNSF_OK; 4489 off += (sf->nsf_numboots * sizeof (time_t)); 4490 4491 /* 4492 * Read through the file, building a list of records for grace 4493 * checking. 4494 * Each record is between sizeof (struct nfst_rec) and 4495 * sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1 4496 * and is actually sizeof (struct nfst_rec) + nst_len - 1. 4497 */ 4498 tsp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4499 NFSV4_OPAQUELIMIT - 1, M_TEMP, M_WAITOK); 4500 do { 4501 error = NFSD_RDWR(UIO_READ, NFSFPVNODE(sf->nsf_fp), 4502 (caddr_t)tsp, sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1, 4503 off, UIO_SYSSPACE, 0, NFSFPCRED(sf->nsf_fp), &aresid, p); 4504 len = (sizeof (struct nfst_rec) + NFSV4_OPAQUELIMIT - 1) - aresid; 4505 if (error || (len > 0 && (len < sizeof (struct nfst_rec) || 4506 len < (sizeof (struct nfst_rec) + tsp->len - 1)))) { 4507 /* 4508 * Yuck, the file has been corrupted, so just return 4509 * after clearing out any restart state, so the grace period 4510 * is over. 4511 */ 4512 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4513 LIST_REMOVE(sp, nst_list); 4514 free((caddr_t)sp, M_TEMP); 4515 } 4516 free((caddr_t)tsp, M_TEMP); 4517 sf->nsf_flags &= ~NFSNSF_OK; 4518 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4519 sf->nsf_bootvals = NULL; 4520 return; 4521 } 4522 if (len > 0) { 4523 off += sizeof (struct nfst_rec) + tsp->len - 1; 4524 /* 4525 * Search the list for a matching client. 4526 */ 4527 LIST_FOREACH(sp, &sf->nsf_head, nst_list) { 4528 if (tsp->len == sp->nst_len && 4529 !NFSBCMP(tsp->client, sp->nst_client, tsp->len)) 4530 break; 4531 } 4532 if (sp == LIST_END(&sf->nsf_head)) { 4533 sp = (struct nfsrv_stable *)malloc(tsp->len + 4534 sizeof (struct nfsrv_stable) - 1, M_TEMP, 4535 M_WAITOK); 4536 NFSBCOPY((caddr_t)tsp, (caddr_t)&sp->nst_rec, 4537 sizeof (struct nfst_rec) + tsp->len - 1); 4538 LIST_INSERT_HEAD(&sf->nsf_head, sp, nst_list); 4539 } else { 4540 if (tsp->flag == NFSNST_REVOKE) 4541 sp->nst_flag |= NFSNST_REVOKE; 4542 else 4543 /* 4544 * A subsequent timestamp indicates the client 4545 * did a setclientid/confirm and any previous 4546 * revoke is no longer relevant. 4547 */ 4548 sp->nst_flag &= ~NFSNST_REVOKE; 4549 } 4550 } 4551 } while (len > 0); 4552 free((caddr_t)tsp, M_TEMP); 4553 sf->nsf_flags = NFSNSF_OK; 4554 sf->nsf_eograce = NFSD_MONOSEC + sf->nsf_lease + 4555 NFSRV_LEASEDELTA; 4556} 4557 4558/* 4559 * Update the stable storage file, now that the grace period is over. 4560 */ 4561APPLESTATIC void 4562nfsrv_updatestable(NFSPROC_T *p) 4563{ 4564 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4565 struct nfsrv_stable *sp, *nsp; 4566 int i; 4567 struct nfsvattr nva; 4568 vnode_t vp; 4569#if defined(__FreeBSD_version) && (__FreeBSD_version >= 500000) 4570 mount_t mp = NULL; 4571#endif 4572 int error; 4573 4574 if (sf->nsf_fp == NULL || (sf->nsf_flags & NFSNSF_UPDATEDONE)) 4575 return; 4576 sf->nsf_flags |= NFSNSF_UPDATEDONE; 4577 /* 4578 * Ok, we need to rewrite the stable storage file. 4579 * - truncate to 0 length 4580 * - write the new first structure 4581 * - loop through the data structures, writing out any that 4582 * have timestamps older than the old boot 4583 */ 4584 if (sf->nsf_bootvals) { 4585 sf->nsf_numboots++; 4586 for (i = sf->nsf_numboots - 2; i >= 0; i--) 4587 sf->nsf_bootvals[i + 1] = sf->nsf_bootvals[i]; 4588 } else { 4589 sf->nsf_numboots = 1; 4590 sf->nsf_bootvals = (time_t *)malloc(sizeof (time_t), 4591 M_TEMP, M_WAITOK); 4592 } 4593 sf->nsf_bootvals[0] = nfsrvboottime; 4594 sf->nsf_lease = nfsrv_lease; 4595 NFSVNO_ATTRINIT(&nva); 4596 NFSVNO_SETATTRVAL(&nva, size, 0); 4597 vp = NFSFPVNODE(sf->nsf_fp); 4598 vn_start_write(vp, &mp, V_WAIT); 4599 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 4600 error = nfsvno_setattr(vp, &nva, NFSFPCRED(sf->nsf_fp), p, 4601 NULL); 4602 NFSVOPUNLOCK(vp, 0); 4603 } else 4604 error = EPERM; 4605 vn_finished_write(mp); 4606 if (!error) 4607 error = NFSD_RDWR(UIO_WRITE, vp, 4608 (caddr_t)&sf->nsf_rec, sizeof (struct nfsf_rec), (off_t)0, 4609 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4610 if (!error) 4611 error = NFSD_RDWR(UIO_WRITE, vp, 4612 (caddr_t)sf->nsf_bootvals, 4613 sf->nsf_numboots * sizeof (time_t), 4614 (off_t)(sizeof (struct nfsf_rec)), 4615 UIO_SYSSPACE, IO_SYNC, NFSFPCRED(sf->nsf_fp), NULL, p); 4616 free((caddr_t)sf->nsf_bootvals, M_TEMP); 4617 sf->nsf_bootvals = NULL; 4618 if (error) { 4619 sf->nsf_flags &= ~NFSNSF_OK; 4620 printf("EEK! Can't write NfsV4 stable storage file\n"); 4621 return; 4622 } 4623 sf->nsf_flags |= NFSNSF_OK; 4624 4625 /* 4626 * Loop through the list and write out timestamp records for 4627 * any clients that successfully reclaimed state. 4628 */ 4629 LIST_FOREACH_SAFE(sp, &sf->nsf_head, nst_list, nsp) { 4630 if (sp->nst_flag & NFSNST_GOTSTATE) { 4631 nfsrv_writestable(sp->nst_client, sp->nst_len, 4632 NFSNST_NEWSTATE, p); 4633 sp->nst_clp->lc_flags |= LCL_STAMPEDSTABLE; 4634 } 4635 LIST_REMOVE(sp, nst_list); 4636 free((caddr_t)sp, M_TEMP); 4637 } 4638 nfsrv_backupstable(); 4639} 4640 4641/* 4642 * Append a record to the stable storage file. 4643 */ 4644APPLESTATIC void 4645nfsrv_writestable(u_char *client, int len, int flag, NFSPROC_T *p) 4646{ 4647 struct nfsrv_stablefirst *sf = &nfsrv_stablefirst; 4648 struct nfst_rec *sp; 4649 int error; 4650 4651 if (!(sf->nsf_flags & NFSNSF_OK) || sf->nsf_fp == NULL) 4652 return; 4653 sp = (struct nfst_rec *)malloc(sizeof (struct nfst_rec) + 4654 len - 1, M_TEMP, M_WAITOK); 4655 sp->len = len; 4656 NFSBCOPY(client, sp->client, len); 4657 sp->flag = flag; 4658 error = NFSD_RDWR(UIO_WRITE, NFSFPVNODE(sf->nsf_fp), 4659 (caddr_t)sp, sizeof (struct nfst_rec) + len - 1, (off_t)0, 4660 UIO_SYSSPACE, (IO_SYNC | IO_APPEND), NFSFPCRED(sf->nsf_fp), NULL, p); 4661 free((caddr_t)sp, M_TEMP); 4662 if (error) { 4663 sf->nsf_flags &= ~NFSNSF_OK; 4664 printf("EEK! Can't write NfsV4 stable storage file\n"); 4665 } 4666} 4667 4668/* 4669 * This function is called during the grace period to mark a client 4670 * that successfully reclaimed state. 4671 */ 4672static void 4673nfsrv_markstable(struct nfsclient *clp) 4674{ 4675 struct nfsrv_stable *sp; 4676 4677 /* 4678 * First find the client structure. 4679 */ 4680 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4681 if (sp->nst_len == clp->lc_idlen && 4682 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4683 break; 4684 } 4685 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head)) 4686 return; 4687 4688 /* 4689 * Now, just mark it and set the nfsclient back pointer. 4690 */ 4691 sp->nst_flag |= NFSNST_GOTSTATE; 4692 sp->nst_clp = clp; 4693} 4694 4695/* 4696 * This function is called for a reclaim, to see if it gets grace. 4697 * It returns 0 if a reclaim is allowed, 1 otherwise. 4698 */ 4699static int 4700nfsrv_checkstable(struct nfsclient *clp) 4701{ 4702 struct nfsrv_stable *sp; 4703 4704 /* 4705 * First, find the entry for the client. 4706 */ 4707 LIST_FOREACH(sp, &nfsrv_stablefirst.nsf_head, nst_list) { 4708 if (sp->nst_len == clp->lc_idlen && 4709 !NFSBCMP(sp->nst_client, clp->lc_id, sp->nst_len)) 4710 break; 4711 } 4712 4713 /* 4714 * If not in the list, state was revoked or no state was issued 4715 * since the previous reboot, a reclaim is denied. 4716 */ 4717 if (sp == LIST_END(&nfsrv_stablefirst.nsf_head) || 4718 (sp->nst_flag & NFSNST_REVOKE) || 4719 !(nfsrv_stablefirst.nsf_flags & NFSNSF_OK)) 4720 return (1); 4721 return (0); 4722} 4723 4724/* 4725 * Test for and try to clear out a conflicting client. This is called by 4726 * nfsrv_lockctrl() and nfsrv_openctrl() when conflicts with other clients 4727 * a found. 4728 * The trick here is that it can't revoke a conflicting client with an 4729 * expired lease unless it holds the v4root lock, so... 4730 * If no v4root lock, get the lock and return 1 to indicate "try again". 4731 * Return 0 to indicate the conflict can't be revoked and 1 to indicate 4732 * the revocation worked and the conflicting client is "bye, bye", so it 4733 * can be tried again. 4734 * Return 2 to indicate that the vnode is VI_DOOMED after NFSVOPLOCK(). 4735 * Unlocks State before a non-zero value is returned. 4736 */ 4737static int 4738nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, vnode_t vp, 4739 NFSPROC_T *p) 4740{ 4741 int gotlock, lktype = 0; 4742 4743 /* 4744 * If lease hasn't expired, we can't fix it. 4745 */ 4746 if (clp->lc_expiry >= NFSD_MONOSEC || 4747 !(nfsrv_stablefirst.nsf_flags & NFSNSF_UPDATEDONE)) 4748 return (0); 4749 if (*haslockp == 0) { 4750 NFSUNLOCKSTATE(); 4751 if (vp != NULL) { 4752 lktype = NFSVOPISLOCKED(vp); 4753 NFSVOPUNLOCK(vp, 0); 4754 } 4755 NFSLOCKV4ROOTMUTEX(); 4756 nfsv4_relref(&nfsv4rootfs_lock); 4757 do { 4758 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4759 NFSV4ROOTLOCKMUTEXPTR, NULL); 4760 } while (!gotlock); 4761 NFSUNLOCKV4ROOTMUTEX(); 4762 *haslockp = 1; 4763 if (vp != NULL) { 4764 NFSVOPLOCK(vp, lktype | LK_RETRY); 4765 if ((vp->v_iflag & VI_DOOMED) != 0) 4766 return (2); 4767 } 4768 return (1); 4769 } 4770 NFSUNLOCKSTATE(); 4771 4772 /* 4773 * Ok, we can expire the conflicting client. 4774 */ 4775 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4776 nfsrv_backupstable(); 4777 nfsrv_cleanclient(clp, p); 4778 nfsrv_freedeleglist(&clp->lc_deleg); 4779 nfsrv_freedeleglist(&clp->lc_olddeleg); 4780 LIST_REMOVE(clp, lc_hash); 4781 nfsrv_zapclient(clp, p); 4782 return (1); 4783} 4784 4785/* 4786 * Resolve a delegation conflict. 4787 * Returns 0 to indicate the conflict was resolved without sleeping. 4788 * Return -1 to indicate that the caller should check for conflicts again. 4789 * Return > 0 for an error that should be returned, normally NFSERR_DELAY. 4790 * 4791 * Also, manipulate the nfsv4root_lock, as required. It isn't changed 4792 * for a return of 0, since there was no sleep and it could be required 4793 * later. It is released for a return of NFSERR_DELAY, since the caller 4794 * will return that error. It is released when a sleep was done waiting 4795 * for the delegation to be returned or expire (so that other nfsds can 4796 * handle ops). Then, it must be acquired for the write to stable storage. 4797 * (This function is somewhat similar to nfsrv_clientconflict(), but 4798 * the semantics differ in a couple of subtle ways. The return of 0 4799 * indicates the conflict was resolved without sleeping here, not 4800 * that the conflict can't be resolved and the handling of nfsv4root_lock 4801 * differs, as noted above.) 4802 * Unlocks State before returning a non-zero value. 4803 */ 4804static int 4805nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p, 4806 vnode_t vp) 4807{ 4808 struct nfsclient *clp = stp->ls_clp; 4809 int gotlock, error, lktype = 0, retrycnt, zapped_clp; 4810 nfsv4stateid_t tstateid; 4811 fhandle_t tfh; 4812 4813 /* 4814 * If the conflict is with an old delegation... 4815 */ 4816 if (stp->ls_flags & NFSLCK_OLDDELEG) { 4817 /* 4818 * You can delete it, if it has expired. 4819 */ 4820 if (clp->lc_delegtime < NFSD_MONOSEC) { 4821 nfsrv_freedeleg(stp); 4822 NFSUNLOCKSTATE(); 4823 error = -1; 4824 goto out; 4825 } 4826 NFSUNLOCKSTATE(); 4827 /* 4828 * During this delay, the old delegation could expire or it 4829 * could be recovered by the client via an Open with 4830 * CLAIM_DELEGATE_PREV. 4831 * Release the nfsv4root_lock, if held. 4832 */ 4833 if (*haslockp) { 4834 *haslockp = 0; 4835 NFSLOCKV4ROOTMUTEX(); 4836 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4837 NFSUNLOCKV4ROOTMUTEX(); 4838 } 4839 error = NFSERR_DELAY; 4840 goto out; 4841 } 4842 4843 /* 4844 * It's a current delegation, so: 4845 * - check to see if the delegation has expired 4846 * - if so, get the v4root lock and then expire it 4847 */ 4848 if (!(stp->ls_flags & NFSLCK_DELEGRECALL)) { 4849 /* 4850 * - do a recall callback, since not yet done 4851 * For now, never allow truncate to be set. To use 4852 * truncate safely, it must be guaranteed that the 4853 * Remove, Rename or Setattr with size of 0 will 4854 * succeed and that would require major changes to 4855 * the VFS/Vnode OPs. 4856 * Set the expiry time large enough so that it won't expire 4857 * until after the callback, then set it correctly, once 4858 * the callback is done. (The delegation will now time 4859 * out whether or not the Recall worked ok. The timeout 4860 * will be extended when ops are done on the delegation 4861 * stateid, up to the timelimit.) 4862 */ 4863 stp->ls_delegtime = NFSD_MONOSEC + (2 * nfsrv_lease) + 4864 NFSRV_LEASEDELTA; 4865 stp->ls_delegtimelimit = NFSD_MONOSEC + (6 * nfsrv_lease) + 4866 NFSRV_LEASEDELTA; 4867 stp->ls_flags |= NFSLCK_DELEGRECALL; 4868 4869 /* 4870 * Loop NFSRV_CBRETRYCNT times while the CBRecall replies 4871 * NFSERR_BADSTATEID or NFSERR_BADHANDLE. This is done 4872 * in order to try and avoid a race that could happen 4873 * when a CBRecall request passed the Open reply with 4874 * the delegation in it when transitting the network. 4875 * Since nfsrv_docallback will sleep, don't use stp after 4876 * the call. 4877 */ 4878 NFSBCOPY((caddr_t)&stp->ls_stateid, (caddr_t)&tstateid, 4879 sizeof (tstateid)); 4880 NFSBCOPY((caddr_t)&stp->ls_lfp->lf_fh, (caddr_t)&tfh, 4881 sizeof (tfh)); 4882 NFSUNLOCKSTATE(); 4883 if (*haslockp) { 4884 *haslockp = 0; 4885 NFSLOCKV4ROOTMUTEX(); 4886 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4887 NFSUNLOCKV4ROOTMUTEX(); 4888 } 4889 retrycnt = 0; 4890 do { 4891 error = nfsrv_docallback(clp, NFSV4OP_CBRECALL, 4892 &tstateid, 0, &tfh, NULL, NULL, p); 4893 retrycnt++; 4894 } while ((error == NFSERR_BADSTATEID || 4895 error == NFSERR_BADHANDLE) && retrycnt < NFSV4_CBRETRYCNT); 4896 error = NFSERR_DELAY; 4897 goto out; 4898 } 4899 4900 if (clp->lc_expiry >= NFSD_MONOSEC && 4901 stp->ls_delegtime >= NFSD_MONOSEC) { 4902 NFSUNLOCKSTATE(); 4903 /* 4904 * A recall has been done, but it has not yet expired. 4905 * So, RETURN_DELAY. 4906 */ 4907 if (*haslockp) { 4908 *haslockp = 0; 4909 NFSLOCKV4ROOTMUTEX(); 4910 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4911 NFSUNLOCKV4ROOTMUTEX(); 4912 } 4913 error = NFSERR_DELAY; 4914 goto out; 4915 } 4916 4917 /* 4918 * If we don't yet have the lock, just get it and then return, 4919 * since we need that before deleting expired state, such as 4920 * this delegation. 4921 * When getting the lock, unlock the vnode, so other nfsds that 4922 * are in progress, won't get stuck waiting for the vnode lock. 4923 */ 4924 if (*haslockp == 0) { 4925 NFSUNLOCKSTATE(); 4926 if (vp != NULL) { 4927 lktype = NFSVOPISLOCKED(vp); 4928 NFSVOPUNLOCK(vp, 0); 4929 } 4930 NFSLOCKV4ROOTMUTEX(); 4931 nfsv4_relref(&nfsv4rootfs_lock); 4932 do { 4933 gotlock = nfsv4_lock(&nfsv4rootfs_lock, 1, NULL, 4934 NFSV4ROOTLOCKMUTEXPTR, NULL); 4935 } while (!gotlock); 4936 NFSUNLOCKV4ROOTMUTEX(); 4937 *haslockp = 1; 4938 if (vp != NULL) { 4939 NFSVOPLOCK(vp, lktype | LK_RETRY); 4940 if ((vp->v_iflag & VI_DOOMED) != 0) { 4941 *haslockp = 0; 4942 NFSLOCKV4ROOTMUTEX(); 4943 nfsv4_unlock(&nfsv4rootfs_lock, 1); 4944 NFSUNLOCKV4ROOTMUTEX(); 4945 error = NFSERR_PERM; 4946 goto out; 4947 } 4948 } 4949 error = -1; 4950 goto out; 4951 } 4952 4953 NFSUNLOCKSTATE(); 4954 /* 4955 * Ok, we can delete the expired delegation. 4956 * First, write the Revoke record to stable storage and then 4957 * clear out the conflict. 4958 * Since all other nfsd threads are now blocked, we can safely 4959 * sleep without the state changing. 4960 */ 4961 nfsrv_writestable(clp->lc_id, clp->lc_idlen, NFSNST_REVOKE, p); 4962 nfsrv_backupstable(); 4963 if (clp->lc_expiry < NFSD_MONOSEC) { 4964 nfsrv_cleanclient(clp, p); 4965 nfsrv_freedeleglist(&clp->lc_deleg); 4966 nfsrv_freedeleglist(&clp->lc_olddeleg); 4967 LIST_REMOVE(clp, lc_hash); 4968 zapped_clp = 1; 4969 } else { 4970 nfsrv_freedeleg(stp); 4971 zapped_clp = 0; 4972 } 4973 if (zapped_clp) 4974 nfsrv_zapclient(clp, p); 4975 error = -1; 4976 4977out: 4978 NFSEXITCODE(error); 4979 return (error); 4980} 4981 4982/* 4983 * Check for a remove allowed, if remove is set to 1 and get rid of 4984 * delegations. 4985 */ 4986APPLESTATIC int 4987nfsrv_checkremove(vnode_t vp, int remove, NFSPROC_T *p) 4988{ 4989 struct nfsstate *stp; 4990 struct nfslockfile *lfp; 4991 int error, haslock = 0; 4992 fhandle_t nfh; 4993 4994 /* 4995 * First, get the lock file structure. 4996 * (A return of -1 means no associated state, so remove ok.) 4997 */ 4998 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 4999tryagain: 5000 NFSLOCKSTATE(); 5001 if (!error) 5002 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5003 if (error) { 5004 NFSUNLOCKSTATE(); 5005 if (haslock) { 5006 NFSLOCKV4ROOTMUTEX(); 5007 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5008 NFSUNLOCKV4ROOTMUTEX(); 5009 } 5010 if (error == -1) 5011 error = 0; 5012 goto out; 5013 } 5014 5015 /* 5016 * Now, we must Recall any delegations. 5017 */ 5018 error = nfsrv_cleandeleg(vp, lfp, NULL, &haslock, p); 5019 if (error) { 5020 /* 5021 * nfsrv_cleandeleg() unlocks state for non-zero 5022 * return. 5023 */ 5024 if (error == -1) 5025 goto tryagain; 5026 if (haslock) { 5027 NFSLOCKV4ROOTMUTEX(); 5028 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5029 NFSUNLOCKV4ROOTMUTEX(); 5030 } 5031 goto out; 5032 } 5033 5034 /* 5035 * Now, look for a conflicting open share. 5036 */ 5037 if (remove) { 5038 LIST_FOREACH(stp, &lfp->lf_open, ls_file) { 5039 if (stp->ls_flags & NFSLCK_WRITEDENY) { 5040 error = NFSERR_FILEOPEN; 5041 break; 5042 } 5043 } 5044 } 5045 5046 NFSUNLOCKSTATE(); 5047 if (haslock) { 5048 NFSLOCKV4ROOTMUTEX(); 5049 nfsv4_unlock(&nfsv4rootfs_lock, 1); 5050 NFSUNLOCKV4ROOTMUTEX(); 5051 } 5052 5053out: 5054 NFSEXITCODE(error); 5055 return (error); 5056} 5057 5058/* 5059 * Clear out all delegations for the file referred to by lfp. 5060 * May return NFSERR_DELAY, if there will be a delay waiting for 5061 * delegations to expire. 5062 * Returns -1 to indicate it slept while recalling a delegation. 5063 * This function has the side effect of deleting the nfslockfile structure, 5064 * if it no longer has associated state and didn't have to sleep. 5065 * Unlocks State before a non-zero value is returned. 5066 */ 5067static int 5068nfsrv_cleandeleg(vnode_t vp, struct nfslockfile *lfp, 5069 struct nfsclient *clp, int *haslockp, NFSPROC_T *p) 5070{ 5071 struct nfsstate *stp, *nstp; 5072 int ret = 0; 5073 5074 stp = LIST_FIRST(&lfp->lf_deleg); 5075 while (stp != LIST_END(&lfp->lf_deleg)) { 5076 nstp = LIST_NEXT(stp, ls_file); 5077 if (stp->ls_clp != clp) { 5078 ret = nfsrv_delegconflict(stp, haslockp, p, vp); 5079 if (ret) { 5080 /* 5081 * nfsrv_delegconflict() unlocks state 5082 * when it returns non-zero. 5083 */ 5084 goto out; 5085 } 5086 } 5087 stp = nstp; 5088 } 5089out: 5090 NFSEXITCODE(ret); 5091 return (ret); 5092} 5093 5094/* 5095 * There are certain operations that, when being done outside of NFSv4, 5096 * require that any NFSv4 delegation for the file be recalled. 5097 * This function is to be called for those cases: 5098 * VOP_RENAME() - When a delegation is being recalled for any reason, 5099 * the client may have to do Opens against the server, using the file's 5100 * final component name. If the file has been renamed on the server, 5101 * that component name will be incorrect and the Open will fail. 5102 * VOP_REMOVE() - Theoretically, a client could Open a file after it has 5103 * been removed on the server, if there is a delegation issued to 5104 * that client for the file. I say "theoretically" since clients 5105 * normally do an Access Op before the Open and that Access Op will 5106 * fail with ESTALE. Note that NFSv2 and 3 don't even do Opens, so 5107 * they will detect the file's removal in the same manner. (There is 5108 * one case where RFC3530 allows a client to do an Open without first 5109 * doing an Access Op, which is passage of a check against the ACE 5110 * returned with a Write delegation, but current practice is to ignore 5111 * the ACE and always do an Access Op.) 5112 * Since the functions can only be called with an unlocked vnode, this 5113 * can't be done at this time. 5114 * VOP_ADVLOCK() - When a client holds a delegation, it can issue byte range 5115 * locks locally in the client, which are not visible to the server. To 5116 * deal with this, issuing of delegations for a vnode must be disabled 5117 * and all delegations for the vnode recalled. This is done via the 5118 * second function, using the VV_DISABLEDELEG vflag on the vnode. 5119 */ 5120APPLESTATIC void 5121nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p) 5122{ 5123 time_t starttime; 5124 int error; 5125 5126 /* 5127 * First, check to see if the server is currently running and it has 5128 * been called for a regular file when issuing delegations. 5129 */ 5130 if (newnfs_numnfsd == 0 || vp->v_type != VREG || 5131 nfsrv_issuedelegs == 0) 5132 return; 5133 5134 KASSERT((NFSVOPISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp)); 5135 /* 5136 * First, get a reference on the nfsv4rootfs_lock so that an 5137 * exclusive lock cannot be acquired by another thread. 5138 */ 5139 NFSLOCKV4ROOTMUTEX(); 5140 nfsv4_getref(&nfsv4rootfs_lock, NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 5141 NFSUNLOCKV4ROOTMUTEX(); 5142 5143 /* 5144 * Now, call nfsrv_checkremove() in a loop while it returns 5145 * NFSERR_DELAY. Return upon any other error or when timed out. 5146 */ 5147 starttime = NFSD_MONOSEC; 5148 do { 5149 if (NFSVOPLOCK(vp, LK_EXCLUSIVE) == 0) { 5150 error = nfsrv_checkremove(vp, 0, p); 5151 NFSVOPUNLOCK(vp, 0); 5152 } else 5153 error = EPERM; 5154 if (error == NFSERR_DELAY) { 5155 if (NFSD_MONOSEC - starttime > NFS_REMOVETIMEO) 5156 break; 5157 /* Sleep for a short period of time */ 5158 (void) nfs_catnap(PZERO, 0, "nfsremove"); 5159 } 5160 } while (error == NFSERR_DELAY); 5161 NFSLOCKV4ROOTMUTEX(); 5162 nfsv4_relref(&nfsv4rootfs_lock); 5163 NFSUNLOCKV4ROOTMUTEX(); 5164} 5165 5166APPLESTATIC void 5167nfsd_disabledelegation(vnode_t vp, NFSPROC_T *p) 5168{ 5169 5170#ifdef VV_DISABLEDELEG 5171 /* 5172 * First, flag issuance of delegations disabled. 5173 */ 5174 atomic_set_long(&vp->v_vflag, VV_DISABLEDELEG); 5175#endif 5176 5177 /* 5178 * Then call nfsd_recalldelegation() to get rid of all extant 5179 * delegations. 5180 */ 5181 nfsd_recalldelegation(vp, p); 5182} 5183 5184/* 5185 * Check for conflicting locks, etc. and then get rid of delegations. 5186 * (At one point I thought that I should get rid of delegations for any 5187 * Setattr, since it could potentially disallow the I/O op (read or write) 5188 * allowed by the delegation. However, Setattr Ops that aren't changing 5189 * the size get a stateid of all 0s, so you can't tell if it is a delegation 5190 * for the same client or a different one, so I decided to only get rid 5191 * of delegations for other clients when the size is being changed.) 5192 * In general, a Setattr can disable NFS I/O Ops that are outstanding, such 5193 * as Write backs, even if there is no delegation, so it really isn't any 5194 * different?) 5195 */ 5196APPLESTATIC int 5197nfsrv_checksetattr(vnode_t vp, struct nfsrv_descript *nd, 5198 nfsv4stateid_t *stateidp, struct nfsvattr *nvap, nfsattrbit_t *attrbitp, 5199 struct nfsexstuff *exp, NFSPROC_T *p) 5200{ 5201 struct nfsstate st, *stp = &st; 5202 struct nfslock lo, *lop = &lo; 5203 int error = 0; 5204 nfsquad_t clientid; 5205 5206 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE)) { 5207 stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS); 5208 lop->lo_first = nvap->na_size; 5209 } else { 5210 stp->ls_flags = 0; 5211 lop->lo_first = 0; 5212 } 5213 if (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNER) || 5214 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_OWNERGROUP) || 5215 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_MODE) || 5216 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_ACL)) 5217 stp->ls_flags |= NFSLCK_SETATTR; 5218 if (stp->ls_flags == 0) 5219 goto out; 5220 lop->lo_end = NFS64BITSSET; 5221 lop->lo_flags = NFSLCK_WRITE; 5222 stp->ls_ownerlen = 0; 5223 stp->ls_op = NULL; 5224 stp->ls_uid = nd->nd_cred->cr_uid; 5225 stp->ls_stateid.seqid = stateidp->seqid; 5226 clientid.lval[0] = stp->ls_stateid.other[0] = stateidp->other[0]; 5227 clientid.lval[1] = stp->ls_stateid.other[1] = stateidp->other[1]; 5228 stp->ls_stateid.other[2] = stateidp->other[2]; 5229 error = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid, 5230 stateidp, exp, nd, p); 5231 5232out: 5233 NFSEXITCODE2(error, nd); 5234 return (error); 5235} 5236 5237/* 5238 * Check for a write delegation and do a CBGETATTR if there is one, updating 5239 * the attributes, as required. 5240 * Should I return an error if I can't get the attributes? (For now, I'll 5241 * just return ok. 5242 */ 5243APPLESTATIC int 5244nfsrv_checkgetattr(struct nfsrv_descript *nd, vnode_t vp, 5245 struct nfsvattr *nvap, nfsattrbit_t *attrbitp, struct ucred *cred, 5246 NFSPROC_T *p) 5247{ 5248 struct nfsstate *stp; 5249 struct nfslockfile *lfp; 5250 struct nfsclient *clp; 5251 struct nfsvattr nva; 5252 fhandle_t nfh; 5253 int error = 0; 5254 nfsattrbit_t cbbits; 5255 u_quad_t delegfilerev; 5256 5257 NFSCBGETATTR_ATTRBIT(attrbitp, &cbbits); 5258 if (!NFSNONZERO_ATTRBIT(&cbbits)) 5259 goto out; 5260 5261 /* 5262 * Get the lock file structure. 5263 * (A return of -1 means no associated state, so return ok.) 5264 */ 5265 error = nfsrv_getlockfh(vp, NFSLCK_CHECK, NULL, &nfh, p); 5266 NFSLOCKSTATE(); 5267 if (!error) 5268 error = nfsrv_getlockfile(NFSLCK_CHECK, NULL, &lfp, &nfh, 0); 5269 if (error) { 5270 NFSUNLOCKSTATE(); 5271 if (error == -1) 5272 error = 0; 5273 goto out; 5274 } 5275 5276 /* 5277 * Now, look for a write delegation. 5278 */ 5279 LIST_FOREACH(stp, &lfp->lf_deleg, ls_file) { 5280 if (stp->ls_flags & NFSLCK_DELEGWRITE) 5281 break; 5282 } 5283 if (stp == LIST_END(&lfp->lf_deleg)) { 5284 NFSUNLOCKSTATE(); 5285 goto out; 5286 } 5287 clp = stp->ls_clp; 5288 delegfilerev = stp->ls_filerev; 5289 5290 /* 5291 * If the Write delegation was issued as a part of this Compound RPC 5292 * or if we have an Implied Clientid (used in a previous Op in this 5293 * compound) and it is the client the delegation was issued to, 5294 * just return ok. 5295 * I also assume that it is from the same client iff the network 5296 * host IP address is the same as the callback address. (Not 5297 * exactly correct by the RFC, but avoids a lot of Getattr 5298 * callbacks.) 5299 */ 5300 if (nd->nd_compref == stp->ls_compref || 5301 ((nd->nd_flag & ND_IMPLIEDCLID) && 5302 clp->lc_clientid.qval == nd->nd_clientid.qval) || 5303 nfsaddr2_match(clp->lc_req.nr_nam, nd->nd_nam)) { 5304 NFSUNLOCKSTATE(); 5305 goto out; 5306 } 5307 5308 /* 5309 * We are now done with the delegation state structure, 5310 * so the statelock can be released and we can now tsleep(). 5311 */ 5312 5313 /* 5314 * Now, we must do the CB Getattr callback, to see if Change or Size 5315 * has changed. 5316 */ 5317 if (clp->lc_expiry >= NFSD_MONOSEC) { 5318 NFSUNLOCKSTATE(); 5319 NFSVNO_ATTRINIT(&nva); 5320 nva.na_filerev = NFS64BITSSET; 5321 error = nfsrv_docallback(clp, NFSV4OP_CBGETATTR, NULL, 5322 0, &nfh, &nva, &cbbits, p); 5323 if (!error) { 5324 if ((nva.na_filerev != NFS64BITSSET && 5325 nva.na_filerev > delegfilerev) || 5326 (NFSVNO_ISSETSIZE(&nva) && 5327 nva.na_size != nvap->na_size)) { 5328 error = nfsvno_updfilerev(vp, nvap, cred, p); 5329 if (NFSVNO_ISSETSIZE(&nva)) 5330 nvap->na_size = nva.na_size; 5331 } 5332 } else 5333 error = 0; /* Ignore callback errors for now. */ 5334 } else { 5335 NFSUNLOCKSTATE(); 5336 } 5337 5338out: 5339 NFSEXITCODE2(error, nd); 5340 return (error); 5341} 5342 5343/* 5344 * This function looks for openowners that haven't had any opens for 5345 * a while and throws them away. Called by an nfsd when NFSNSF_NOOPENS 5346 * is set. 5347 */ 5348APPLESTATIC void 5349nfsrv_throwawayopens(NFSPROC_T *p) 5350{ 5351 struct nfsclient *clp, *nclp; 5352 struct nfsstate *stp, *nstp; 5353 int i; 5354 5355 NFSLOCKSTATE(); 5356 nfsrv_stablefirst.nsf_flags &= ~NFSNSF_NOOPENS; 5357 /* 5358 * For each client... 5359 */ 5360 for (i = 0; i < nfsrv_clienthashsize; i++) { 5361 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5362 LIST_FOREACH_SAFE(stp, &clp->lc_open, ls_list, nstp) { 5363 if (LIST_EMPTY(&stp->ls_open) && 5364 (stp->ls_noopens > NFSNOOPEN || 5365 (nfsrv_openpluslock * 2) > 5366 nfsrv_v4statelimit)) 5367 nfsrv_freeopenowner(stp, 0, p); 5368 } 5369 } 5370 } 5371 NFSUNLOCKSTATE(); 5372} 5373 5374/* 5375 * This function checks to see if the credentials are the same. 5376 * Returns 1 for not same, 0 otherwise. 5377 */ 5378static int 5379nfsrv_notsamecredname(struct nfsrv_descript *nd, struct nfsclient *clp) 5380{ 5381 5382 if (nd->nd_flag & ND_GSS) { 5383 if (!(clp->lc_flags & LCL_GSS)) 5384 return (1); 5385 if (clp->lc_flags & LCL_NAME) { 5386 if (nd->nd_princlen != clp->lc_namelen || 5387 NFSBCMP(nd->nd_principal, clp->lc_name, 5388 clp->lc_namelen)) 5389 return (1); 5390 else 5391 return (0); 5392 } 5393 if (nd->nd_cred->cr_uid == clp->lc_uid) 5394 return (0); 5395 else 5396 return (1); 5397 } else if (clp->lc_flags & LCL_GSS) 5398 return (1); 5399 /* 5400 * For AUTH_SYS, allow the same uid or root. (This is underspecified 5401 * in RFC3530, which talks about principals, but doesn't say anything 5402 * about uids for AUTH_SYS.) 5403 */ 5404 if (nd->nd_cred->cr_uid == clp->lc_uid || nd->nd_cred->cr_uid == 0) 5405 return (0); 5406 else 5407 return (1); 5408} 5409 5410/* 5411 * Calculate the lease expiry time. 5412 */ 5413static time_t 5414nfsrv_leaseexpiry(void) 5415{ 5416 5417 if (nfsrv_stablefirst.nsf_eograce > NFSD_MONOSEC) 5418 return (NFSD_MONOSEC + 2 * (nfsrv_lease + NFSRV_LEASEDELTA)); 5419 return (NFSD_MONOSEC + nfsrv_lease + NFSRV_LEASEDELTA); 5420} 5421 5422/* 5423 * Delay the delegation timeout as far as ls_delegtimelimit, as required. 5424 */ 5425static void 5426nfsrv_delaydelegtimeout(struct nfsstate *stp) 5427{ 5428 5429 if ((stp->ls_flags & NFSLCK_DELEGRECALL) == 0) 5430 return; 5431 5432 if ((stp->ls_delegtime + 15) > NFSD_MONOSEC && 5433 stp->ls_delegtime < stp->ls_delegtimelimit) { 5434 stp->ls_delegtime += nfsrv_lease; 5435 if (stp->ls_delegtime > stp->ls_delegtimelimit) 5436 stp->ls_delegtime = stp->ls_delegtimelimit; 5437 } 5438} 5439 5440/* 5441 * This function checks to see if there is any other state associated 5442 * with the openowner for this Open. 5443 * It returns 1 if there is no other state, 0 otherwise. 5444 */ 5445static int 5446nfsrv_nootherstate(struct nfsstate *stp) 5447{ 5448 struct nfsstate *tstp; 5449 5450 LIST_FOREACH(tstp, &stp->ls_openowner->ls_open, ls_list) { 5451 if (tstp != stp || !LIST_EMPTY(&tstp->ls_lock)) 5452 return (0); 5453 } 5454 return (1); 5455} 5456 5457/* 5458 * Create a list of lock deltas (changes to local byte range locking 5459 * that can be rolled back using the list) and apply the changes via 5460 * nfsvno_advlock(). Optionally, lock the list. It is expected that either 5461 * the rollback or update function will be called after this. 5462 * It returns an error (and rolls back, as required), if any nfsvno_advlock() 5463 * call fails. If it returns an error, it will unlock the list. 5464 */ 5465static int 5466nfsrv_locallock(vnode_t vp, struct nfslockfile *lfp, int flags, 5467 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5468{ 5469 struct nfslock *lop, *nlop; 5470 int error = 0; 5471 5472 /* Loop through the list of locks. */ 5473 lop = LIST_FIRST(&lfp->lf_locallock); 5474 while (first < end && lop != NULL) { 5475 nlop = LIST_NEXT(lop, lo_lckowner); 5476 if (first >= lop->lo_end) { 5477 /* not there yet */ 5478 lop = nlop; 5479 } else if (first < lop->lo_first) { 5480 /* new one starts before entry in list */ 5481 if (end <= lop->lo_first) { 5482 /* no overlap between old and new */ 5483 error = nfsrv_dolocal(vp, lfp, flags, 5484 NFSLCK_UNLOCK, first, end, cfp, p); 5485 if (error != 0) 5486 break; 5487 first = end; 5488 } else { 5489 /* handle fragment overlapped with new one */ 5490 error = nfsrv_dolocal(vp, lfp, flags, 5491 NFSLCK_UNLOCK, first, lop->lo_first, cfp, 5492 p); 5493 if (error != 0) 5494 break; 5495 first = lop->lo_first; 5496 } 5497 } else { 5498 /* new one overlaps this entry in list */ 5499 if (end <= lop->lo_end) { 5500 /* overlaps all of new one */ 5501 error = nfsrv_dolocal(vp, lfp, flags, 5502 lop->lo_flags, first, end, cfp, p); 5503 if (error != 0) 5504 break; 5505 first = end; 5506 } else { 5507 /* handle fragment overlapped with new one */ 5508 error = nfsrv_dolocal(vp, lfp, flags, 5509 lop->lo_flags, first, lop->lo_end, cfp, p); 5510 if (error != 0) 5511 break; 5512 first = lop->lo_end; 5513 lop = nlop; 5514 } 5515 } 5516 } 5517 if (first < end && error == 0) 5518 /* handle fragment past end of list */ 5519 error = nfsrv_dolocal(vp, lfp, flags, NFSLCK_UNLOCK, first, 5520 end, cfp, p); 5521 5522 NFSEXITCODE(error); 5523 return (error); 5524} 5525 5526/* 5527 * Local lock unlock. Unlock all byte ranges that are no longer locked 5528 * by NFSv4. To do this, unlock any subranges of first-->end that 5529 * do not overlap with the byte ranges of any lock in the lfp->lf_lock 5530 * list. This list has all locks for the file held by other 5531 * <clientid, lockowner> tuples. The list is ordered by increasing 5532 * lo_first value, but may have entries that overlap each other, for 5533 * the case of read locks. 5534 */ 5535static void 5536nfsrv_localunlock(vnode_t vp, struct nfslockfile *lfp, uint64_t init_first, 5537 uint64_t init_end, NFSPROC_T *p) 5538{ 5539 struct nfslock *lop; 5540 uint64_t first, end, prevfirst; 5541 5542 first = init_first; 5543 end = init_end; 5544 while (first < init_end) { 5545 /* Loop through all nfs locks, adjusting first and end */ 5546 prevfirst = 0; 5547 LIST_FOREACH(lop, &lfp->lf_lock, lo_lckfile) { 5548 KASSERT(prevfirst <= lop->lo_first, 5549 ("nfsv4 locks out of order")); 5550 KASSERT(lop->lo_first < lop->lo_end, 5551 ("nfsv4 bogus lock")); 5552 prevfirst = lop->lo_first; 5553 if (first >= lop->lo_first && 5554 first < lop->lo_end) 5555 /* 5556 * Overlaps with initial part, so trim 5557 * off that initial part by moving first past 5558 * it. 5559 */ 5560 first = lop->lo_end; 5561 else if (end > lop->lo_first && 5562 lop->lo_first > first) { 5563 /* 5564 * This lock defines the end of the 5565 * segment to unlock, so set end to the 5566 * start of it and break out of the loop. 5567 */ 5568 end = lop->lo_first; 5569 break; 5570 } 5571 if (first >= end) 5572 /* 5573 * There is no segment left to do, so 5574 * break out of this loop and then exit 5575 * the outer while() since first will be set 5576 * to end, which must equal init_end here. 5577 */ 5578 break; 5579 } 5580 if (first < end) { 5581 /* Unlock this segment */ 5582 (void) nfsrv_dolocal(vp, lfp, NFSLCK_UNLOCK, 5583 NFSLCK_READ, first, end, NULL, p); 5584 nfsrv_locallock_commit(lfp, NFSLCK_UNLOCK, 5585 first, end); 5586 } 5587 /* 5588 * Now move past this segment and look for any further 5589 * segment in the range, if there is one. 5590 */ 5591 first = end; 5592 end = init_end; 5593 } 5594} 5595 5596/* 5597 * Do the local lock operation and update the rollback list, as required. 5598 * Perform the rollback and return the error if nfsvno_advlock() fails. 5599 */ 5600static int 5601nfsrv_dolocal(vnode_t vp, struct nfslockfile *lfp, int flags, int oldflags, 5602 uint64_t first, uint64_t end, struct nfslockconflict *cfp, NFSPROC_T *p) 5603{ 5604 struct nfsrollback *rlp; 5605 int error = 0, ltype, oldltype; 5606 5607 if (flags & NFSLCK_WRITE) 5608 ltype = F_WRLCK; 5609 else if (flags & NFSLCK_READ) 5610 ltype = F_RDLCK; 5611 else 5612 ltype = F_UNLCK; 5613 if (oldflags & NFSLCK_WRITE) 5614 oldltype = F_WRLCK; 5615 else if (oldflags & NFSLCK_READ) 5616 oldltype = F_RDLCK; 5617 else 5618 oldltype = F_UNLCK; 5619 if (ltype == oldltype || (oldltype == F_WRLCK && ltype == F_RDLCK)) 5620 /* nothing to do */ 5621 goto out; 5622 error = nfsvno_advlock(vp, ltype, first, end, p); 5623 if (error != 0) { 5624 if (cfp != NULL) { 5625 cfp->cl_clientid.lval[0] = 0; 5626 cfp->cl_clientid.lval[1] = 0; 5627 cfp->cl_first = 0; 5628 cfp->cl_end = NFS64BITSSET; 5629 cfp->cl_flags = NFSLCK_WRITE; 5630 cfp->cl_ownerlen = 5; 5631 NFSBCOPY("LOCAL", cfp->cl_owner, 5); 5632 } 5633 nfsrv_locallock_rollback(vp, lfp, p); 5634 } else if (ltype != F_UNLCK) { 5635 rlp = malloc(sizeof (struct nfsrollback), M_NFSDROLLBACK, 5636 M_WAITOK); 5637 rlp->rlck_first = first; 5638 rlp->rlck_end = end; 5639 rlp->rlck_type = oldltype; 5640 LIST_INSERT_HEAD(&lfp->lf_rollback, rlp, rlck_list); 5641 } 5642 5643out: 5644 NFSEXITCODE(error); 5645 return (error); 5646} 5647 5648/* 5649 * Roll back local lock changes and free up the rollback list. 5650 */ 5651static void 5652nfsrv_locallock_rollback(vnode_t vp, struct nfslockfile *lfp, NFSPROC_T *p) 5653{ 5654 struct nfsrollback *rlp, *nrlp; 5655 5656 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) { 5657 (void) nfsvno_advlock(vp, rlp->rlck_type, rlp->rlck_first, 5658 rlp->rlck_end, p); 5659 free(rlp, M_NFSDROLLBACK); 5660 } 5661 LIST_INIT(&lfp->lf_rollback); 5662} 5663 5664/* 5665 * Update local lock list and delete rollback list (ie now committed to the 5666 * local locks). Most of the work is done by the internal function. 5667 */ 5668static void 5669nfsrv_locallock_commit(struct nfslockfile *lfp, int flags, uint64_t first, 5670 uint64_t end) 5671{ 5672 struct nfsrollback *rlp, *nrlp; 5673 struct nfslock *new_lop, *other_lop; 5674 5675 new_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, M_WAITOK); 5676 if (flags & (NFSLCK_READ | NFSLCK_WRITE)) 5677 other_lop = malloc(sizeof (struct nfslock), M_NFSDLOCK, 5678 M_WAITOK); 5679 else 5680 other_lop = NULL; 5681 new_lop->lo_flags = flags; 5682 new_lop->lo_first = first; 5683 new_lop->lo_end = end; 5684 nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp); 5685 if (new_lop != NULL) 5686 free(new_lop, M_NFSDLOCK); 5687 if (other_lop != NULL) 5688 free(other_lop, M_NFSDLOCK); 5689 5690 /* and get rid of the rollback list */ 5691 LIST_FOREACH_SAFE(rlp, &lfp->lf_rollback, rlck_list, nrlp) 5692 free(rlp, M_NFSDROLLBACK); 5693 LIST_INIT(&lfp->lf_rollback); 5694} 5695 5696/* 5697 * Lock the struct nfslockfile for local lock updating. 5698 */ 5699static void 5700nfsrv_locklf(struct nfslockfile *lfp) 5701{ 5702 int gotlock; 5703 5704 /* lf_usecount ensures *lfp won't be free'd */ 5705 lfp->lf_usecount++; 5706 do { 5707 gotlock = nfsv4_lock(&lfp->lf_locallock_lck, 1, NULL, 5708 NFSSTATEMUTEXPTR, NULL); 5709 } while (gotlock == 0); 5710 lfp->lf_usecount--; 5711} 5712 5713/* 5714 * Unlock the struct nfslockfile after local lock updating. 5715 */ 5716static void 5717nfsrv_unlocklf(struct nfslockfile *lfp) 5718{ 5719 5720 nfsv4_unlock(&lfp->lf_locallock_lck, 0); 5721} 5722 5723/* 5724 * Clear out all state for the NFSv4 server. 5725 * Must be called by a thread that can sleep when no nfsds are running. 5726 */ 5727void 5728nfsrv_throwawayallstate(NFSPROC_T *p) 5729{ 5730 struct nfsclient *clp, *nclp; 5731 struct nfslockfile *lfp, *nlfp; 5732 int i; 5733 5734 /* 5735 * For each client, clean out the state and then free the structure. 5736 */ 5737 for (i = 0; i < nfsrv_clienthashsize; i++) { 5738 LIST_FOREACH_SAFE(clp, &nfsclienthash[i], lc_hash, nclp) { 5739 nfsrv_cleanclient(clp, p); 5740 nfsrv_freedeleglist(&clp->lc_deleg); 5741 nfsrv_freedeleglist(&clp->lc_olddeleg); 5742 free(clp->lc_stateid, M_NFSDCLIENT); 5743 free(clp, M_NFSDCLIENT); 5744 } 5745 } 5746 5747 /* 5748 * Also, free up any remaining lock file structures. 5749 */ 5750 for (i = 0; i < nfsrv_lockhashsize; i++) { 5751 LIST_FOREACH_SAFE(lfp, &nfslockhash[i], lf_hash, nlfp) { 5752 printf("nfsd unload: fnd a lock file struct\n"); 5753 nfsrv_freenfslockfile(lfp); 5754 } 5755 } 5756} 5757 5758/* 5759 * Check the sequence# for the session and slot provided as an argument. 5760 * Also, renew the lease if the session will return NFS_OK. 5761 */ 5762int 5763nfsrv_checksequence(struct nfsrv_descript *nd, uint32_t sequenceid, 5764 uint32_t *highest_slotidp, uint32_t *target_highest_slotidp, int cache_this, 5765 uint32_t *sflagsp, NFSPROC_T *p) 5766{ 5767 struct nfsdsession *sep; 5768 struct nfssessionhash *shp; 5769 int error; 5770 SVCXPRT *savxprt; 5771 5772 shp = NFSSESSIONHASH(nd->nd_sessionid); 5773 NFSLOCKSESSION(shp); 5774 sep = nfsrv_findsession(nd->nd_sessionid); 5775 if (sep == NULL) { 5776 NFSUNLOCKSESSION(shp); 5777 return (NFSERR_BADSESSION); 5778 } 5779 error = nfsv4_seqsession(sequenceid, nd->nd_slotid, *highest_slotidp, 5780 sep->sess_slots, NULL, NFSV4_SLOTS - 1); 5781 if (error != 0) { 5782 NFSUNLOCKSESSION(shp); 5783 return (error); 5784 } 5785 if (cache_this != 0) 5786 nd->nd_flag |= ND_SAVEREPLY; 5787 /* Renew the lease. */ 5788 sep->sess_clp->lc_expiry = nfsrv_leaseexpiry(); 5789 nd->nd_clientid.qval = sep->sess_clp->lc_clientid.qval; 5790 nd->nd_flag |= ND_IMPLIEDCLID; 5791 5792 /* 5793 * If this session handles the backchannel, save the nd_xprt for this 5794 * RPC, since this is the one being used. 5795 */ 5796 if (sep->sess_clp->lc_req.nr_client != NULL && 5797 (sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) { 5798 savxprt = sep->sess_cbsess.nfsess_xprt; 5799 SVC_ACQUIRE(nd->nd_xprt); 5800 nd->nd_xprt->xp_p2 = 5801 sep->sess_clp->lc_req.nr_client->cl_private; 5802 nd->nd_xprt->xp_idletimeout = 0; /* Disable timeout. */ 5803 sep->sess_cbsess.nfsess_xprt = nd->nd_xprt; 5804 if (savxprt != NULL) 5805 SVC_RELEASE(savxprt); 5806 } 5807 5808 *sflagsp = 0; 5809 if (sep->sess_clp->lc_req.nr_client == NULL) 5810 *sflagsp |= NFSV4SEQ_CBPATHDOWN; 5811 NFSUNLOCKSESSION(shp); 5812 if (error == NFSERR_EXPIRED) { 5813 *sflagsp |= NFSV4SEQ_EXPIREDALLSTATEREVOKED; 5814 error = 0; 5815 } else if (error == NFSERR_ADMINREVOKED) { 5816 *sflagsp |= NFSV4SEQ_ADMINSTATEREVOKED; 5817 error = 0; 5818 } 5819 *highest_slotidp = *target_highest_slotidp = NFSV4_SLOTS - 1; 5820 return (0); 5821} 5822 5823/* 5824 * Check/set reclaim complete for this session/clientid. 5825 */ 5826int 5827nfsrv_checkreclaimcomplete(struct nfsrv_descript *nd) 5828{ 5829 struct nfsdsession *sep; 5830 struct nfssessionhash *shp; 5831 int error = 0; 5832 5833 shp = NFSSESSIONHASH(nd->nd_sessionid); 5834 NFSLOCKSTATE(); 5835 NFSLOCKSESSION(shp); 5836 sep = nfsrv_findsession(nd->nd_sessionid); 5837 if (sep == NULL) { 5838 NFSUNLOCKSESSION(shp); 5839 NFSUNLOCKSTATE(); 5840 return (NFSERR_BADSESSION); 5841 } 5842 5843 /* Check to see if reclaim complete has already happened. */ 5844 if ((sep->sess_clp->lc_flags & LCL_RECLAIMCOMPLETE) != 0) 5845 error = NFSERR_COMPLETEALREADY; 5846 else 5847 sep->sess_clp->lc_flags |= LCL_RECLAIMCOMPLETE; 5848 NFSUNLOCKSESSION(shp); 5849 NFSUNLOCKSTATE(); 5850 return (error); 5851} 5852 5853/* 5854 * Cache the reply in a session slot. 5855 */ 5856void 5857nfsrv_cache_session(uint8_t *sessionid, uint32_t slotid, int repstat, 5858 struct mbuf **m) 5859{ 5860 struct nfsdsession *sep; 5861 struct nfssessionhash *shp; 5862 5863 shp = NFSSESSIONHASH(sessionid); 5864 NFSLOCKSESSION(shp); 5865 sep = nfsrv_findsession(sessionid); 5866 if (sep == NULL) { 5867 NFSUNLOCKSESSION(shp); 5868 printf("nfsrv_cache_session: no session\n"); 5869 m_freem(*m); 5870 return; 5871 } 5872 nfsv4_seqsess_cacherep(slotid, sep->sess_slots, repstat, m); 5873 NFSUNLOCKSESSION(shp); 5874} 5875 5876/* 5877 * Search for a session that matches the sessionid. 5878 */ 5879static struct nfsdsession * 5880nfsrv_findsession(uint8_t *sessionid) 5881{ 5882 struct nfsdsession *sep; 5883 struct nfssessionhash *shp; 5884 5885 shp = NFSSESSIONHASH(sessionid); 5886 LIST_FOREACH(sep, &shp->list, sess_hash) { 5887 if (!NFSBCMP(sessionid, sep->sess_sessionid, NFSX_V4SESSIONID)) 5888 break; 5889 } 5890 return (sep); 5891} 5892 5893/* 5894 * Destroy a session. 5895 */ 5896int 5897nfsrv_destroysession(struct nfsrv_descript *nd, uint8_t *sessionid) 5898{ 5899 int error, samesess; 5900 5901 samesess = 0; 5902 if (!NFSBCMP(sessionid, nd->nd_sessionid, NFSX_V4SESSIONID)) { 5903 samesess = 1; 5904 if ((nd->nd_flag & ND_LASTOP) == 0) 5905 return (NFSERR_BADSESSION); 5906 } 5907 error = nfsrv_freesession(NULL, sessionid); 5908 if (error == 0 && samesess != 0) 5909 nd->nd_flag &= ~ND_HASSEQUENCE; 5910 return (error); 5911} 5912 5913/* 5914 * Free up a session structure. 5915 */ 5916static int 5917nfsrv_freesession(struct nfsdsession *sep, uint8_t *sessionid) 5918{ 5919 struct nfssessionhash *shp; 5920 int i; 5921 5922 NFSLOCKSTATE(); 5923 if (sep == NULL) { 5924 shp = NFSSESSIONHASH(sessionid); 5925 NFSLOCKSESSION(shp); 5926 sep = nfsrv_findsession(sessionid); 5927 } else { 5928 shp = NFSSESSIONHASH(sep->sess_sessionid); 5929 NFSLOCKSESSION(shp); 5930 } 5931 if (sep != NULL) { 5932 sep->sess_refcnt--; 5933 if (sep->sess_refcnt > 0) { 5934 NFSUNLOCKSESSION(shp); 5935 NFSUNLOCKSTATE(); 5936 return (0); 5937 } 5938 LIST_REMOVE(sep, sess_hash); 5939 LIST_REMOVE(sep, sess_list); 5940 } 5941 NFSUNLOCKSESSION(shp); 5942 NFSUNLOCKSTATE(); 5943 if (sep == NULL) 5944 return (NFSERR_BADSESSION); 5945 for (i = 0; i < NFSV4_SLOTS; i++) 5946 if (sep->sess_slots[i].nfssl_reply != NULL) 5947 m_freem(sep->sess_slots[i].nfssl_reply); 5948 if (sep->sess_cbsess.nfsess_xprt != NULL) 5949 SVC_RELEASE(sep->sess_cbsess.nfsess_xprt); 5950 free(sep, M_NFSDSESSION); 5951 return (0); 5952} 5953 5954/* 5955 * Free a stateid. 5956 * RFC5661 says that it should fail when there are associated opens, locks 5957 * or delegations. Since stateids represent opens, I don't see how you can 5958 * free an open stateid (it will be free'd when closed), so this function 5959 * only works for lock stateids (freeing the lock_owner) or delegations. 5960 */ 5961int 5962nfsrv_freestateid(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, 5963 NFSPROC_T *p) 5964{ 5965 struct nfsclient *clp; 5966 struct nfsstate *stp; 5967 int error; 5968 5969 NFSLOCKSTATE(); 5970 /* 5971 * Look up the stateid 5972 */ 5973 error = nfsrv_getclient((nfsquad_t)((u_quad_t)0), CLOPS_RENEW, &clp, 5974 NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p); 5975 if (error == 0) { 5976 /* First, check for a delegation. */ 5977 LIST_FOREACH(stp, &clp->lc_deleg, ls_list) { 5978 if (!NFSBCMP(stp->ls_stateid.other, stateidp->other, 5979 NFSX_STATEIDOTHER)) 5980 break; 5981 } 5982 if (stp != NULL) { 5983 nfsrv_freedeleg(stp); 5984 NFSUNLOCKSTATE(); 5985 return (error); 5986 } 5987 } 5988 /* Not a delegation, try for a lock_owner. */ 5989 if (error == 0) 5990 error = nfsrv_getstate(clp, stateidp, 0, &stp); 5991 if (error == 0 && ((stp->ls_flags & (NFSLCK_OPEN | NFSLCK_DELEGREAD | 5992 NFSLCK_DELEGWRITE)) != 0 || (stp->ls_flags & NFSLCK_LOCK) == 0)) 5993 /* Not a lock_owner stateid. */ 5994 error = NFSERR_LOCKSHELD; 5995 if (error == 0 && !LIST_EMPTY(&stp->ls_lock)) 5996 error = NFSERR_LOCKSHELD; 5997 if (error == 0) 5998 nfsrv_freelockowner(stp, NULL, 0, p); 5999 NFSUNLOCKSTATE(); 6000 return (error); 6001} 6002 6003/* 6004 * Generate the xdr for an NFSv4.1 CBSequence Operation. 6005 */ 6006static int 6007nfsv4_setcbsequence(struct nfsrv_descript *nd, struct nfsclient *clp, 6008 int dont_replycache, struct nfsdsession **sepp) 6009{ 6010 struct nfsdsession *sep; 6011 uint32_t *tl, slotseq = 0; 6012 int maxslot, slotpos; 6013 uint8_t sessionid[NFSX_V4SESSIONID]; 6014 int error; 6015 6016 error = nfsv4_getcbsession(clp, sepp); 6017 if (error != 0) 6018 return (error); 6019 sep = *sepp; 6020 (void)nfsv4_sequencelookup(NULL, &sep->sess_cbsess, &slotpos, &maxslot, 6021 &slotseq, sessionid); 6022 KASSERT(maxslot >= 0, ("nfsv4_setcbsequence neg maxslot")); 6023 6024 /* Build the Sequence arguments. */ 6025 NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 5 * NFSX_UNSIGNED); 6026 bcopy(sessionid, tl, NFSX_V4SESSIONID); 6027 tl += NFSX_V4SESSIONID / NFSX_UNSIGNED; 6028 nd->nd_slotseq = tl; 6029 *tl++ = txdr_unsigned(slotseq); 6030 *tl++ = txdr_unsigned(slotpos); 6031 *tl++ = txdr_unsigned(maxslot); 6032 if (dont_replycache == 0) 6033 *tl++ = newnfs_true; 6034 else 6035 *tl++ = newnfs_false; 6036 *tl = 0; /* No referring call list, for now. */ 6037 nd->nd_flag |= ND_HASSEQUENCE; 6038 return (0); 6039} 6040 6041/* 6042 * Get a session for the callback. 6043 */ 6044static int 6045nfsv4_getcbsession(struct nfsclient *clp, struct nfsdsession **sepp) 6046{ 6047 struct nfsdsession *sep; 6048 6049 NFSLOCKSTATE(); 6050 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6051 if ((sep->sess_crflags & NFSV4CRSESS_CONNBACKCHAN) != 0) 6052 break; 6053 } 6054 if (sep == NULL) { 6055 NFSUNLOCKSTATE(); 6056 return (NFSERR_BADSESSION); 6057 } 6058 sep->sess_refcnt++; 6059 *sepp = sep; 6060 NFSUNLOCKSTATE(); 6061 return (0); 6062} 6063 6064/* 6065 * Free up all backchannel xprts. This needs to be done when the nfsd threads 6066 * exit, since those transports will all be going away. 6067 * This is only called after all the nfsd threads are done performing RPCs, 6068 * so locking shouldn't be an issue. 6069 */ 6070APPLESTATIC void 6071nfsrv_freeallbackchannel_xprts(void) 6072{ 6073 struct nfsdsession *sep; 6074 struct nfsclient *clp; 6075 SVCXPRT *xprt; 6076 int i; 6077 6078 for (i = 0; i < nfsrv_clienthashsize; i++) { 6079 LIST_FOREACH(clp, &nfsclienthash[i], lc_hash) { 6080 LIST_FOREACH(sep, &clp->lc_session, sess_list) { 6081 xprt = sep->sess_cbsess.nfsess_xprt; 6082 sep->sess_cbsess.nfsess_xprt = NULL; 6083 if (xprt != NULL) 6084 SVC_RELEASE(xprt); 6085 } 6086 } 6087 } 6088} 6089 6090